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Char/Misc driver patches for 4.3-rc1

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Here's the "big" char/misc driver update for 4.3-rc1.
 
 Not much really interesting here, just a number of little changes all
 over the place, and some nice consolidation of the nvmem drivers to a
 common framework.  As usual, the mei drivers stand out as the largest
 "churn" to handle new devices and features in their hardware.
 
 All have been in linux-next for a while with no issues.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'char-misc-4.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc

Pull char/misc driver patches from Greg KH:
 "Here's the "big" char/misc driver update for 4.3-rc1.

  Not much really interesting here, just a number of little changes all
  over the place, and some nice consolidation of the nvmem drivers to a
  common framework.  As usual, the mei drivers stand out as the largest
  "churn" to handle new devices and features in their hardware.

  All have been in linux-next for a while with no issues"

* tag 'char-misc-4.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (136 commits)
  auxdisplay: ks0108: initialize local parport variable
  extcon: palmas: Fix build break due to devm_gpiod_get_optional API change
  extcon: palmas: Support GPIO based USB ID detection
  extcon: Fix signedness bugs about break error handling
  extcon: Drop owner assignment from i2c_driver
  extcon: arizona: Simplify pdata symantics for micd_dbtime
  extcon: arizona: Declare 3-pole jack if we detect open circuit on mic
  extcon: Add exception handling to prevent the NULL pointer access
  extcon: arizona: Ensure variables are set for headphone detection
  extcon: arizona: Use gpiod inteface to handle micd_pol_gpio gpio
  extcon: arizona: Add basic microphone detection DT/ACPI bindings
  extcon: arizona: Update to use the new device properties API
  extcon: palmas: Remove the mutually_exclusive array
  extcon: Remove optional print_state() function pointer of struct extcon_dev
  extcon: Remove duplicate header file in extcon.h
  extcon: max77843: Clear IRQ bits state before request IRQ
  toshiba laptop: replace ioremap_cache with ioremap
  misc: eeprom: max6875: clean up max6875_read()
  misc: eeprom: clean up eeprom_read()
  misc: eeprom: 93xx46: clean up eeprom_93xx46_bin_read/write
  ...
This commit is contained in:
Linus Torvalds 2015-08-31 08:34:13 -07:00
commit 1c00038c76
136 changed files with 6021 additions and 1808 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

29
Documentation/ABI/stable/sysfs-bus-vmbus Normal file
View File

@ -0,0 +1,29 @@
What: /sys/bus/vmbus/devices/vmbus_*/id
Date: Jul 2009
KernelVersion: 2.6.31
Contact: K. Y. Srinivasan <kys@microsoft.com>
Description: The VMBus child_relid of the device's primary channel
Users: tools/hv/lsvmbus
What: /sys/bus/vmbus/devices/vmbus_*/class_id
Date: Jul 2009
KernelVersion: 2.6.31
Contact: K. Y. Srinivasan <kys@microsoft.com>
Description: The VMBus interface type GUID of the device
Users: tools/hv/lsvmbus
What: /sys/bus/vmbus/devices/vmbus_*/device_id
Date: Jul 2009
KernelVersion: 2.6.31
Contact: K. Y. Srinivasan <kys@microsoft.com>
Description: The VMBus interface instance GUID of the device
Users: tools/hv/lsvmbus
What: /sys/bus/vmbus/devices/vmbus_*/channel_vp_mapping
Date: Jul 2015
KernelVersion: 4.2.0
Contact: K. Y. Srinivasan <kys@microsoft.com>
Description: The mapping of which primary/sub channels are bound to which
Virtual Processors.
Format: <channel's child_relid:the bound cpu's number>
Users: tools/hv/lsvmbus

2
Documentation/ABI/testing/sysfs-bus-coresight-devices-etm3x
View File

@ -112,7 +112,7 @@ KernelVersion: 3.19
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
Description: (RW) Mask to apply to all the context ID comparator.
What: /sys/bus/coresight/devices/<memory_map>.[etm|ptm]/ctxid_val
What: /sys/bus/coresight/devices/<memory_map>.[etm|ptm]/ctxid_pid
Date: November 2014
KernelVersion: 3.19
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>

2
Documentation/ABI/testing/sysfs-bus-coresight-devices-etm4x
View File

@ -249,7 +249,7 @@ KernelVersion: 4.01
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
Description: (RW) Select which context ID comparator to work with.
What: /sys/bus/coresight/devices/<memory_map>.etm/ctxid_val
What: /sys/bus/coresight/devices/<memory_map>.etm/ctxid_pid
Date: April 2015
KernelVersion: 4.01
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>

22
Documentation/ABI/testing/sysfs-driver-sunxi-sid
View File

@ -1,22 +0,0 @@
What: /sys/devices/*/<our-device>/eeprom
Date: August 2013
Contact: Oliver Schinagl <oliver@schinagl.nl>
Description: read-only access to the SID (Security-ID) on current
A-series SoC's from Allwinner. Currently supports A10, A10s, A13
and A20 CPU's. The earlier A1x series of SoCs exports 16 bytes,
whereas the newer A20 SoC exposes 512 bytes split into sections.
Besides the 16 bytes of SID, there's also an SJTAG area,
HDMI-HDCP key and some custom keys. Below a quick overview, for
details see the user manual:
0x000 128 bit root-key (sun[457]i)
0x010 128 bit boot-key (sun7i)
0x020 64 bit security-jtag-key (sun7i)
0x028 16 bit key configuration (sun7i)
0x02b 16 bit custom-vendor-key (sun7i)
0x02c 320 bit low general key (sun7i)
0x040 32 bit read-control access (sun7i)
0x064 224 bit low general key (sun7i)
0x080 2304 bit HDCP-key (sun7i)
0x1a0 768 bit high general key (sun7i)
Users: any user space application which wants to read the SID on
Allwinner's A-series of CPU's.

1
Documentation/devicetree/bindings/arm/coresight.txt
View File

@ -17,6 +17,7 @@ its hardware characteristcs.
- "arm,coresight-tmc", "arm,primecell";
- "arm,coresight-funnel", "arm,primecell";
- "arm,coresight-etm3x", "arm,primecell";
- "arm,coresight-etm4x", "arm,primecell";
- "qcom,coresight-replicator1x", "arm,primecell";
* reg: physical base address and length of the register

5
Documentation/devicetree/bindings/extcon/extcon-palmas.txt
View File

@ -10,8 +10,11 @@ Required Properties:
Optional Properties:
- ti,wakeup : To enable the wakeup comparator in probe
- ti,enable-id-detection: Perform ID detection.
- ti,enable-id-detection: Perform ID detection. If id-gpio is specified
it performs id-detection using GPIO else using OTG core.
- ti,enable-vbus-detection: Perform VBUS detection.
- id-gpio: gpio for GPIO ID detection. See gpio binding.
- debounce-delay-ms: debounce delay for GPIO ID pin in milliseconds.
palmas-usb {
compatible = "ti,twl6035-usb", "ti,palmas-usb";

4
Documentation/devicetree/bindings/misc/allwinner,sunxi-sid.txt → Documentation/devicetree/bindings/nvmem/allwinner,sunxi-sid.txt
View File

@ -4,6 +4,10 @@ Required properties:
- compatible: "allwinner,sun4i-a10-sid" or "allwinner,sun7i-a20-sid"
- reg: Should contain registers location and length
= Data cells =
Are child nodes of qfprom, bindings of which as described in
bindings/nvmem/nvmem.txt
Example for sun4i:
sid@01c23800 {
compatible = "allwinner,sun4i-a10-sid";

80
Documentation/devicetree/bindings/nvmem/nvmem.txt Normal file
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@ -0,0 +1,80 @@
= NVMEM(Non Volatile Memory) Data Device Tree Bindings =
This binding is intended to represent the location of hardware
configuration data stored in NVMEMs like eeprom, efuses and so on.
On a significant proportion of boards, the manufacturer has stored
some data on NVMEM, for the OS to be able to retrieve these information
and act upon it. Obviously, the OS has to know about where to retrieve
these data from, and where they are stored on the storage device.
This document is here to document this.
= Data providers =
Contains bindings specific to provider drivers and data cells as children
of this node.
Optional properties:
read-only: Mark the provider as read only.
= Data cells =
These are the child nodes of the provider which contain data cell
information like offset and size in nvmem provider.
Required properties:
reg: specifies the offset in byte within the storage device.
Optional properties:
bits: Is pair of bit location and number of bits, which specifies offset
in bit and number of bits within the address range specified by reg property.
Offset takes values from 0-7.
For example:
/* Provider */
qfprom: qfprom@00700000 {
...
/* Data cells */
tsens_calibration: calib@404 {
reg = <0x404 0x10>;
};
tsens_calibration_bckp: calib_bckp@504 {
reg = <0x504 0x11>;
bits = <6 128>
};
pvs_version: pvs-version@6 {
reg = <0x6 0x2>
bits = <7 2>
};
speed_bin: speed-bin@c{
reg = <0xc 0x1>;
bits = <2 3>;
};
...
};
= Data consumers =
Are device nodes which consume nvmem data cells/providers.
Required-properties:
nvmem-cells: list of phandle to the nvmem data cells.
nvmem-cell-names: names for the each nvmem-cells specified. Required if
nvmem-cells is used.
Optional-properties:
nvmem : list of phandles to nvmem providers.
nvmem-names: names for the each nvmem provider. required if nvmem is used.
For example:
tsens {
...
nvmem-cells = <&tsens_calibration>;
nvmem-cell-names = "calibration";
};

35
Documentation/devicetree/bindings/nvmem/qfprom.txt Normal file
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@ -0,0 +1,35 @@
= Qualcomm QFPROM device tree bindings =
This binding is intended to represent QFPROM which is found in most QCOM SOCs.
Required properties:
- compatible: should be "qcom,qfprom"
- reg: Should contain registers location and length
= Data cells =
Are child nodes of qfprom, bindings of which as described in
bindings/nvmem/nvmem.txt
Example:
qfprom: qfprom@00700000 {
compatible = "qcom,qfprom";
reg = <0x00700000 0x8000>;
...
/* Data cells */
tsens_calibration: calib@404 {
reg = <0x4404 0x10>;
};
};
= Data consumers =
Are device nodes which consume nvmem data cells.
For example:
tsens {
...
nvmem-cells = <&tsens_calibration>;
nvmem-cell-names = "calibration";
};

48
Documentation/devicetree/bindings/power/qcom,coincell-charger.txt Normal file
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@ -0,0 +1,48 @@
Qualcomm Coincell Charger:
The hardware block controls charging for a coincell or capacitor that is
used to provide power backup for certain features of the power management
IC (PMIC)
- compatible:
Usage: required
Value type: <string>
Definition: must be: "qcom,pm8941-coincell"
- reg:
Usage: required
Value type: <u32>
Definition: base address of the coincell charger registers
- qcom,rset-ohms:
Usage: required
Value type: <u32>
Definition: resistance (in ohms) for current-limiting resistor
must be one of: 800, 1200, 1700, 2100
- qcom,vset-millivolts:
Usage: required
Value type: <u32>
Definition: voltage (in millivolts) to apply for charging
must be one of: 2500, 3000, 3100, 3200
- qcom,charger-disable:
Usage: optional
Value type: <boolean>
Definition: definining this property disables charging
This charger is a sub-node of one of the 8941 PMIC blocks, and is specified
as a child node in DTS of that node. See ../mfd/qcom,spmi-pmic.txt and
../mfd/qcom-pm8xxx.txt
Example:
pm8941@0 {
coincell@2800 {
compatible = "qcom,pm8941-coincell";
reg = <0x2800>;
qcom,rset-ohms = <2100>;
qcom,vset-millivolts = <3000>;
};
};

2
Documentation/ioctl/ioctl-number.txt
View File

@ -124,6 +124,8 @@ Code Seq#(hex) Include File Comments
'H' 00-7F linux/hiddev.h conflict!
'H' 00-0F linux/hidraw.h conflict!
'H' 01 linux/mei.h conflict!
'H' 02 linux/mei.h conflict!
'H' 03 linux/mei.h conflict!
'H' 00-0F sound/asound.h conflict!
'H' 20-40 sound/asound_fm.h conflict!
'H' 80-8F sound/sfnt_info.h conflict!

45
Documentation/misc-devices/mei/mei.txt
View File

@ -96,7 +96,7 @@ A code snippet for an application communicating with Intel AMTHI client:
IOCTL
=====
The Intel MEI Driver supports the following IOCTL command:
The Intel MEI Driver supports the following IOCTL commands:
IOCTL_MEI_CONNECT_CLIENT Connect to firmware Feature (client).
usage:
@ -125,6 +125,49 @@ The Intel MEI Driver supports the following IOCTL command:
data that can be sent or received. (e.g. if MTU=2K, can send
requests up to bytes 2k and received responses up to 2k bytes).
IOCTL_MEI_NOTIFY_SET: enable or disable event notifications
Usage:
uint32_t enable;
ioctl(fd, IOCTL_MEI_NOTIFY_SET, &enable);
Inputs:
uint32_t enable = 1;
or
uint32_t enable[disable] = 0;
Error returns:
EINVAL Wrong IOCTL Number
ENODEV Device is not initialized or the client not connected
ENOMEM Unable to allocate memory to client internal data.
EFAULT Fatal Error (e.g. Unable to access user input data)
EOPNOTSUPP if the device doesn't support the feature
Notes:
The client must be connected in order to enable notification events
IOCTL_MEI_NOTIFY_GET : retrieve event
Usage:
uint32_t event;
ioctl(fd, IOCTL_MEI_NOTIFY_GET, &event);
Outputs:
1 - if an event is pending
0 - if there is no even pending
Error returns:
EINVAL Wrong IOCTL Number
ENODEV Device is not initialized or the client not connected
ENOMEM Unable to allocate memory to client internal data.
EFAULT Fatal Error (e.g. Unable to access user input data)
EOPNOTSUPP if the device doesn't support the feature
Notes:
The client must be connected and event notification has to be enabled
in order to receive an event
Intel ME Applications
=====================

152
Documentation/nvmem/nvmem.txt Normal file
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@ -0,0 +1,152 @@
NVMEM SUBSYSTEM
Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
This document explains the NVMEM Framework along with the APIs provided,
and how to use it.
1. Introduction
===============
*NVMEM* is the abbreviation for Non Volatile Memory layer. It is used to
retrieve configuration of SOC or Device specific data from non volatile
memories like eeprom, efuses and so on.
Before this framework existed, NVMEM drivers like eeprom were stored in
drivers/misc, where they all had to duplicate pretty much the same code to
register a sysfs file, allow in-kernel users to access the content of the
devices they were driving, etc.
This was also a problem as far as other in-kernel users were involved, since
the solutions used were pretty much different from one driver to another, there
was a rather big abstraction leak.
This framework aims at solve these problems. It also introduces DT
representation for consumer devices to go get the data they require (MAC
Addresses, SoC/Revision ID, part numbers, and so on) from the NVMEMs. This
framework is based on regmap, so that most of the abstraction available in
regmap can be reused, across multiple types of buses.
NVMEM Providers
+++++++++++++++
NVMEM provider refers to an entity that implements methods to initialize, read
and write the non-volatile memory.
2. Registering/Unregistering the NVMEM provider
===============================================
A NVMEM provider can register with NVMEM core by supplying relevant
nvmem configuration to nvmem_register(), on success core would return a valid
nvmem_device pointer.
nvmem_unregister(nvmem) is used to unregister a previously registered provider.
For example, a simple qfprom case:
static struct nvmem_config econfig = {
.name = "qfprom",
.owner = THIS_MODULE,
};
static int qfprom_probe(struct platform_device *pdev)
{
...
econfig.dev = &pdev->dev;
nvmem = nvmem_register(&econfig);
...
}
It is mandatory that the NVMEM provider has a regmap associated with its
struct device. Failure to do would return error code from nvmem_register().
NVMEM Consumers
+++++++++++++++
NVMEM consumers are the entities which make use of the NVMEM provider to
read from and to NVMEM.
3. NVMEM cell based consumer APIs
=================================
NVMEM cells are the data entries/fields in the NVMEM.
The NVMEM framework provides 3 APIs to read/write NVMEM cells.
struct nvmem_cell *nvmem_cell_get(struct device *dev, const char *name);
struct nvmem_cell *devm_nvmem_cell_get(struct device *dev, const char *name);
void nvmem_cell_put(struct nvmem_cell *cell);
void devm_nvmem_cell_put(struct device *dev, struct nvmem_cell *cell);
void *nvmem_cell_read(struct nvmem_cell *cell, ssize_t *len);
int nvmem_cell_write(struct nvmem_cell *cell, void *buf, ssize_t len);
*nvmem_cell_get() apis will get a reference to nvmem cell for a given id,
and nvmem_cell_read/write() can then read or write to the cell.
Once the usage of the cell is finished the consumer should call *nvmem_cell_put()
to free all the allocation memory for the cell.
4. Direct NVMEM device based consumer APIs
==========================================
In some instances it is necessary to directly read/write the NVMEM.
To facilitate such consumers NVMEM framework provides below apis.
struct nvmem_device *nvmem_device_get(struct device *dev, const char *name);
struct nvmem_device *devm_nvmem_device_get(struct device *dev,
const char *name);
void nvmem_device_put(struct nvmem_device *nvmem);
int nvmem_device_read(struct nvmem_device *nvmem, unsigned int offset,
size_t bytes, void *buf);
int nvmem_device_write(struct nvmem_device *nvmem, unsigned int offset,
size_t bytes, void *buf);
int nvmem_device_cell_read(struct nvmem_device *nvmem,
struct nvmem_cell_info *info, void *buf);
int nvmem_device_cell_write(struct nvmem_device *nvmem,
struct nvmem_cell_info *info, void *buf);
Before the consumers can read/write NVMEM directly, it should get hold
of nvmem_controller from one of the *nvmem_device_get() api.
The difference between these apis and cell based apis is that these apis always
take nvmem_device as parameter.
5. Releasing a reference to the NVMEM
=====================================
When a consumers no longer needs the NVMEM, it has to release the reference
to the NVMEM it has obtained using the APIs mentioned in the above section.
The NVMEM framework provides 2 APIs to release a reference to the NVMEM.
void nvmem_cell_put(struct nvmem_cell *cell);
void devm_nvmem_cell_put(struct device *dev, struct nvmem_cell *cell);
void nvmem_device_put(struct nvmem_device *nvmem);
void devm_nvmem_device_put(struct device *dev, struct nvmem_device *nvmem);
Both these APIs are used to release a reference to the NVMEM and
devm_nvmem_cell_put and devm_nvmem_device_put destroys the devres associated
with this NVMEM.
Userspace
+++++++++
6. Userspace binary interface
==============================
Userspace can read/write the raw NVMEM file located at
/sys/bus/nvmem/devices/*/nvmem
ex:
hexdump /sys/bus/nvmem/devices/qfprom0/nvmem
0000000 0000 0000 0000 0000 0000 0000 0000 0000
*
00000a0 db10 2240 0000 e000 0c00 0c00 0000 0c00
0000000 0000 0000 0000 0000 0000 0000 0000 0000
...
*
0001000
7. DeviceTree Binding
=====================
See Documentation/devicetree/bindings/nvmem/nvmem.txt

6
Documentation/power/suspend-and-cpuhotplug.txt
View File

@ -72,7 +72,7 @@ More details follow:
|
v
Disable regular cpu hotplug
by setting cpu_hotplug_disabled=1
by increasing cpu_hotplug_disabled
|
v
Release cpu_add_remove_lock
@ -89,7 +89,7 @@ Resuming back is likewise, with the counterparts being (in the order of
execution during resume):
* enable_nonboot_cpus() which involves:
| Acquire cpu_add_remove_lock
| Reset cpu_hotplug_disabled to 0, thereby enabling regular cpu hotplug
| Decrease cpu_hotplug_disabled, thereby enabling regular cpu hotplug
| Call _cpu_up() [for all those cpus in the frozen_cpus mask, in a loop]
| Release cpu_add_remove_lock
v
@ -120,7 +120,7 @@ after the entire cycle is complete (i.e., suspend + resume).
Acquire cpu_add_remove_lock
|
v
If cpu_hotplug_disabled is 1
If cpu_hotplug_disabled > 0
return gracefully
|
|

4
Documentation/trace/coresight.txt
View File

@ -15,7 +15,7 @@ HW assisted tracing is becoming increasingly useful when dealing with systems
that have many SoCs and other components like GPU and DMA engines. ARM has
developed a HW assisted tracing solution by means of different components, each
being added to a design at synthesis time to cater to specific tracing needs.
Compoments are generally categorised as source, link and sinks and are
Components are generally categorised as source, link and sinks and are
(usually) discovered using the AMBA bus.
"Sources" generate a compressed stream representing the processor instruction
@ -138,7 +138,7 @@ void coresight_unregister(struct coresight_device *csdev);
The registering function is taking a "struct coresight_device *csdev" and
register the device with the core framework. The unregister function takes
a reference to a "strut coresight_device", obtained at registration time.
a reference to a "struct coresight_device", obtained at registration time.
If everything goes well during the registration process the new devices will
show up under /sys/bus/coresight/devices, as showns here for a TC2 platform:

10
MAINTAINERS
View File

@ -4966,6 +4966,7 @@ F: drivers/scsi/storvsc_drv.c
F: drivers/video/fbdev/hyperv_fb.c
F: include/linux/hyperv.h
F: tools/hv/
F: Documentation/ABI/stable/sysfs-bus-vmbus
I2C OVER PARALLEL PORT
M: Jean Delvare <jdelvare@suse.com>
@ -7298,6 +7299,15 @@ S: Supported
F: drivers/block/nvme*
F: include/linux/nvme.h
NVMEM FRAMEWORK
M: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
M: Maxime Ripard <maxime.ripard@free-electrons.com>
S: Maintained
F: drivers/nvmem/
F: Documentation/devicetree/bindings/nvmem/
F: include/linux/nvmem-consumer.h
F: include/linux/nvmem-provider.h
NXP-NCI NFC DRIVER
M: Clément Perrochaud <clement.perrochaud@effinnov.com>
R: Charles Gorand <charles.gorand@effinnov.com>

10
arch/arm/boot/dts/qcom-msm8974-sony-xperia-honami.dts
View File

@ -17,3 +17,13 @@
status = "ok";
};
};
&spmi_bus {
pm8941@0 {
coincell@2800 {
status = "ok";
qcom,rset-ohms = <2100>;
qcom,vset-millivolts = <3000>;
};
};
};

6
arch/arm/boot/dts/qcom-pm8941.dtsi
View File

@ -125,6 +125,12 @@
interrupts = <0x0 0x36 0x0 IRQ_TYPE_EDGE_RISING>;
qcom,external-resistor-micro-ohms = <10000>;
};
coincell@2800 {
compatible = "qcom,pm8941-coincell";
reg = <0x2800>;
status = "disabled";
};
};
usid1: pm8941@1 {

5
arch/x86/include/asm/mshyperv.h
View File

@ -7,6 +7,7 @@
struct ms_hyperv_info {
u32 features;
u32 misc_features;
u32 hints;
};
@ -20,4 +21,8 @@ void hyperv_vector_handler(struct pt_regs *regs);
void hv_setup_vmbus_irq(void (*handler)(void));
void hv_remove_vmbus_irq(void);
void hv_setup_kexec_handler(void (*handler)(void));
void hv_remove_kexec_handler(void);
void hv_setup_crash_handler(void (*handler)(struct pt_regs *regs));
void hv_remove_crash_handler(void);
#endif

2
arch/x86/include/uapi/asm/hyperv.h
View File

@ -27,6 +27,8 @@
#define HV_X64_MSR_VP_RUNTIME_AVAILABLE (1 << 0)
/* Partition Reference Counter (HV_X64_MSR_TIME_REF_COUNT) available*/
#define HV_X64_MSR_TIME_REF_COUNT_AVAILABLE (1 << 1)
/* Partition reference TSC MSR is available */
#define HV_X64_MSR_REFERENCE_TSC_AVAILABLE (1 << 9)
/* A partition's reference time stamp counter (TSC) page */
#define HV_X64_MSR_REFERENCE_TSC 0x40000021

47
arch/x86/kernel/cpu/mshyperv.c
View File

@ -18,6 +18,7 @@
#include <linux/efi.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/kexec.h>
#include <asm/processor.h>
#include <asm/hypervisor.h>
#include <asm/hyperv.h>
@ -28,10 +29,14 @@
#include <asm/i8259.h>
#include <asm/apic.h>
#include <asm/timer.h>
#include <asm/reboot.h>
struct ms_hyperv_info ms_hyperv;
EXPORT_SYMBOL_GPL(ms_hyperv);
static void (*hv_kexec_handler)(void);
static void (*hv_crash_handler)(struct pt_regs *regs);
#if IS_ENABLED(CONFIG_HYPERV)
static void (*vmbus_handler)(void);
@ -67,8 +72,47 @@ void hv_remove_vmbus_irq(void)
}
EXPORT_SYMBOL_GPL(hv_setup_vmbus_irq);
EXPORT_SYMBOL_GPL(hv_remove_vmbus_irq);
void hv_setup_kexec_handler(void (*handler)(void))
{
hv_kexec_handler = handler;
}
EXPORT_SYMBOL_GPL(hv_setup_kexec_handler);
void hv_remove_kexec_handler(void)
{
hv_kexec_handler = NULL;
}
EXPORT_SYMBOL_GPL(hv_remove_kexec_handler);
void hv_setup_crash_handler(void (*handler)(struct pt_regs *regs))
{
hv_crash_handler = handler;
}
EXPORT_SYMBOL_GPL(hv_setup_crash_handler);
void hv_remove_crash_handler(void)
{
hv_crash_handler = NULL;
}
EXPORT_SYMBOL_GPL(hv_remove_crash_handler);
#endif
static void hv_machine_shutdown(void)
{
if (kexec_in_progress && hv_kexec_handler)
hv_kexec_handler();
native_machine_shutdown();
}
static void hv_machine_crash_shutdown(struct pt_regs *regs)
{
if (hv_crash_handler)
hv_crash_handler(regs);
native_machine_crash_shutdown(regs);
}
static uint32_t __init ms_hyperv_platform(void)
{
u32 eax;
@ -114,6 +158,7 @@ static void __init ms_hyperv_init_platform(void)
* Extract the features and hints
*/
ms_hyperv.features = cpuid_eax(HYPERV_CPUID_FEATURES);
ms_hyperv.misc_features = cpuid_edx(HYPERV_CPUID_FEATURES);
ms_hyperv.hints = cpuid_eax(HYPERV_CPUID_ENLIGHTMENT_INFO);
printk(KERN_INFO "HyperV: features 0x%x, hints 0x%x\n",
@ -141,6 +186,8 @@ static void __init ms_hyperv_init_platform(void)
no_timer_check = 1;
#endif
machine_ops.shutdown = hv_machine_shutdown;
machine_ops.crash_shutdown = hv_machine_crash_shutdown;
}
const __refconst struct hypervisor_x86 x86_hyper_ms_hyperv = {

2
drivers/Kconfig
View File

@ -184,4 +184,6 @@ source "drivers/android/Kconfig"
source "drivers/nvdimm/Kconfig"
source "drivers/nvmem/Kconfig"
endmenu

1
drivers/Makefile
View File

@ -165,3 +165,4 @@ obj-$(CONFIG_RAS) += ras/
obj-$(CONFIG_THUNDERBOLT) += thunderbolt/
obj-$(CONFIG_CORESIGHT) += hwtracing/coresight/
obj-$(CONFIG_ANDROID) += android/
obj-$(CONFIG_NVMEM) += nvmem/

101
drivers/auxdisplay/ks0108.c
View File

@ -23,6 +23,8 @@
*
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/init.h>
#include <linux/module.h>
#include <linux/kernel.h>
@ -90,17 +92,19 @@ void ks0108_displaystate(unsigned char state)
void ks0108_startline(unsigned char startline)
{
ks0108_writedata(min(startline,(unsigned char)63) | bit(6) | bit(7));
ks0108_writedata(min_t(unsigned char, startline, 63) | bit(6) |
bit(7));
}
void ks0108_address(unsigned char address)
{
ks0108_writedata(min(address,(unsigned char)63) | bit(6));
ks0108_writedata(min_t(unsigned char, address, 63) | bit(6));
}
void ks0108_page(unsigned char page)
{
ks0108_writedata(min(page,(unsigned char)7) | bit(3) | bit(4) | bit(5) | bit(7));
ks0108_writedata(min_t(unsigned char, page, 7) | bit(3) | bit(4) |
bit(5) | bit(7));
}
EXPORT_SYMBOL_GPL(ks0108_writedata);
@ -121,52 +125,71 @@ unsigned char ks0108_isinited(void)
}
EXPORT_SYMBOL_GPL(ks0108_isinited);
static void ks0108_parport_attach(struct parport *port)
{
struct pardev_cb ks0108_cb;
if (port->base != ks0108_port)
return;
memset(&ks0108_cb, 0, sizeof(ks0108_cb));
ks0108_cb.flags = PARPORT_DEV_EXCL;
ks0108_pardevice = parport_register_dev_model(port, KS0108_NAME,
&ks0108_cb, 0);
if (!ks0108_pardevice) {
pr_err("ERROR: parport didn't register new device\n");
return;
}
if (parport_claim(ks0108_pardevice)) {
pr_err("could not claim access to parport %i. Aborting.\n",
ks0108_port);
goto err_unreg_device;
}
ks0108_parport = port;
ks0108_inited = 1;
return;
err_unreg_device:
parport_unregister_device(ks0108_pardevice);
ks0108_pardevice = NULL;
}
static void ks0108_parport_detach(struct parport *port)
{
if (port->base != ks0108_port)
return;
if (!ks0108_pardevice) {
pr_err("%s: already unregistered.\n", KS0108_NAME);
return;
}
parport_release(ks0108_pardevice);
parport_unregister_device(ks0108_pardevice);
ks0108_pardevice = NULL;
ks0108_parport = NULL;
}
/*
* Module Init & Exit
*/
static struct parport_driver ks0108_parport_driver = {
.name = "ks0108",
.match_port = ks0108_parport_attach,
.detach = ks0108_parport_detach,
.devmodel = true,
};
static int __init ks0108_init(void)
{
int result;
int ret = -EINVAL;
ks0108_parport = parport_find_base(ks0108_port);
if (ks0108_parport == NULL) {
printk(KERN_ERR KS0108_NAME ": ERROR: "
"parport didn't find %i port\n", ks0108_port);
goto none;
}
ks0108_pardevice = parport_register_device(ks0108_parport, KS0108_NAME,
NULL, NULL, NULL, PARPORT_DEV_EXCL, NULL);
if (ks0108_pardevice == NULL) {
printk(KERN_ERR KS0108_NAME ": ERROR: "
"parport didn't register new device\n");
goto none;
}
result = parport_claim(ks0108_pardevice);
if (result != 0) {
printk(KERN_ERR KS0108_NAME ": ERROR: "
"can't claim %i parport, maybe in use\n", ks0108_port);
ret = result;
goto registered;
}
ks0108_inited = 1;
return 0;
registered:
parport_unregister_device(ks0108_pardevice);
none:
return ret;
return parport_register_driver(&ks0108_parport_driver);
}
static void __exit ks0108_exit(void)
{
parport_release(ks0108_pardevice);
parport_unregister_device(ks0108_pardevice);
parport_unregister_driver(&ks0108_parport_driver);
}
module_init(ks0108_init);

17
drivers/char/misc.c
View File

@ -243,17 +243,15 @@ int misc_register(struct miscdevice * misc)
* @misc: device to unregister
*
* Unregister a miscellaneous device that was previously
* successfully registered with misc_register(). Success
* is indicated by a zero return, a negative errno code
* indicates an error.
* successfully registered with misc_register().
*/
int misc_deregister(struct miscdevice *misc)
void misc_deregister(struct miscdevice *misc)
{
int i = DYNAMIC_MINORS - misc->minor - 1;
if (WARN_ON(list_empty(&misc->list)))
return -EINVAL;
return;
mutex_lock(&misc_mtx);
list_del(&misc->list);
@ -261,7 +259,6 @@ int misc_deregister(struct miscdevice *misc)
if (i < DYNAMIC_MINORS && i >= 0)
clear_bit(i, misc_minors);
mutex_unlock(&misc_mtx);
return 0;
}
EXPORT_SYMBOL(misc_register);
@ -281,10 +278,9 @@ static char *misc_devnode(struct device *dev, umode_t *mode)
static int __init misc_init(void)
{
int err;
struct proc_dir_entry *ret;
#ifdef CONFIG_PROC_FS
proc_create("misc", 0, NULL, &misc_proc_fops);
#endif
ret = proc_create("misc", 0, NULL, &misc_proc_fops);
misc_class = class_create(THIS_MODULE, "misc");
err = PTR_ERR(misc_class);
if (IS_ERR(misc_class))
@ -300,7 +296,8 @@ fail_printk:
printk("unable to get major %d for misc devices\n", MISC_MAJOR);
class_destroy(misc_class);
fail_remove:
remove_proc_entry("misc", NULL);
if (ret)
remove_proc_entry("misc", NULL);
return err;
}
subsys_initcall(misc_init);

2
drivers/char/nvram.c
View File

@ -702,7 +702,7 @@ static void atari_proc_infos(unsigned char *nvram, struct seq_file *seq,
seq_printf(seq, "%ds%s\n", nvram[10],
nvram[10] < 8 ? ", no memory test" : "");
vmode = (nvram[14] << 8) || nvram[15];
vmode = (nvram[14] << 8) | nvram[15];
seq_printf(seq,
"Video mode : %s colors, %d columns, %s %s monitor\n",
colors[vmode & 7],

2
drivers/char/toshiba.c
View File

@ -430,7 +430,7 @@ static int tosh_probe(void)
int i,major,minor,day,year,month,flag;
unsigned char signature[7] = { 0x54,0x4f,0x53,0x48,0x49,0x42,0x41 };
SMMRegisters regs;
void __iomem *bios = ioremap_cache(0xf0000, 0x10000);
void __iomem *bios = ioremap(0xf0000, 0x10000);
if (!bios)
return -ENOMEM;

10
drivers/char/xillybus/xillybus_pcie.c
View File

@ -193,14 +193,16 @@ static int xilly_probe(struct pci_dev *pdev,
}
/*
* In theory, an attempt to set the DMA mask to 64 and dma_using_dac=1
* is the right thing. But some unclever PCIe drivers report it's OK
* when the hardware drops those 64-bit PCIe packets. So trust
* nobody and use 32 bits DMA addressing in any case.
* Some (old and buggy?) hardware drops 64-bit addressed PCIe packets,
* even when the PCIe driver claims that a 64-bit mask is OK. On the
* other hand, on some architectures, 64-bit addressing is mandatory.
* So go for the 64-bit mask only when failing is the other option.
*/
if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(32))) {
endpoint->dma_using_dac = 0;
} else if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64))) {
endpoint->dma_using_dac = 1;
} else {
dev_err(endpoint->dev, "Failed to set DMA mask. Aborting.\n");
return -ENODEV;

101
drivers/extcon/extcon-arizona.c
View File

@ -20,10 +20,12 @@
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/err.h>
#include <linux/gpio/consumer.h>
#include <linux/gpio.h>
#include <linux/input.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/property.h>
#include <linux/regulator/consumer.h>
#include <linux/extcon.h>
@ -46,6 +48,9 @@
#define HPDET_DEBOUNCE 500
#define DEFAULT_MICD_TIMEOUT 2000
#define MICD_DBTIME_TWO_READINGS 2
#define MICD_DBTIME_FOUR_READINGS 4
#define MICD_LVL_1_TO_7 (ARIZONA_MICD_LVL_1 | ARIZONA_MICD_LVL_2 | \
ARIZONA_MICD_LVL_3 | ARIZONA_MICD_LVL_4 | \
ARIZONA_MICD_LVL_5 | ARIZONA_MICD_LVL_6 | \
@ -94,6 +99,8 @@ struct arizona_extcon_info {
int hpdet_ip_version;
struct extcon_dev *edev;
struct gpio_desc *micd_pol_gpio;
};
static const struct arizona_micd_config micd_default_modes[] = {
@ -204,6 +211,10 @@ static void arizona_extcon_set_mode(struct arizona_extcon_info *info, int mode)
if (arizona->pdata.micd_pol_gpio > 0)
gpio_set_value_cansleep(arizona->pdata.micd_pol_gpio,
info->micd_modes[mode].gpio);
else
gpiod_set_value_cansleep(info->micd_pol_gpio,
info->micd_modes[mode].gpio);
regmap_update_bits(arizona->regmap, ARIZONA_MIC_DETECT_1,
ARIZONA_MICD_BIAS_SRC_MASK,
info->micd_modes[mode].bias <<
@ -757,10 +768,11 @@ static void arizona_micd_timeout_work(struct work_struct *work)
mutex_lock(&info->lock);
dev_dbg(info->arizona->dev, "MICD timed out, reporting HP\n");
arizona_identify_headphone(info);
info->detecting = false;
arizona_identify_headphone(info);
arizona_stop_mic(info);
mutex_unlock(&info->lock);
@ -820,12 +832,18 @@ static void arizona_micd_detect(struct work_struct *work)
/* Due to jack detect this should never happen */
if (!(val & ARIZONA_MICD_STS)) {
dev_warn(arizona->dev, "Detected open circuit\n");
info->mic = false;
arizona_stop_mic(info);
info->detecting = false;
arizona_identify_headphone(info);
goto handled;
}
/* If we got a high impedence we should have a headset, report it. */
if (info->detecting && (val & ARIZONA_MICD_LVL_8)) {
info->mic = true;
info->detecting = false;
arizona_identify_headphone(info);
ret = extcon_set_cable_state_(info->edev,
@ -841,8 +859,6 @@ static void arizona_micd_detect(struct work_struct *work)
ret);
}
info->mic = true;
info->detecting = false;
goto handled;
}
@ -855,10 +871,11 @@ static void arizona_micd_detect(struct work_struct *work)
if (info->detecting && (val & MICD_LVL_1_TO_7)) {
if (info->jack_flips >= info->micd_num_modes * 10) {
dev_dbg(arizona->dev, "Detected HP/line\n");
arizona_identify_headphone(info);
info->detecting = false;
arizona_identify_headphone(info);
arizona_stop_mic(info);
} else {
info->micd_mode++;
@ -1110,12 +1127,12 @@ static void arizona_micd_set_level(struct arizona *arizona, int index,
regmap_update_bits(arizona->regmap, reg, mask, level);
}
static int arizona_extcon_of_get_pdata(struct arizona *arizona)
static int arizona_extcon_device_get_pdata(struct arizona *arizona)
{
struct arizona_pdata *pdata = &arizona->pdata;
unsigned int val = ARIZONA_ACCDET_MODE_HPL;
of_property_read_u32(arizona->dev->of_node, "wlf,hpdet-channel", &val);
device_property_read_u32(arizona->dev, "wlf,hpdet-channel", &val);
switch (val) {
case ARIZONA_ACCDET_MODE_HPL:
case ARIZONA_ACCDET_MODE_HPR:
@ -1127,6 +1144,24 @@ static int arizona_extcon_of_get_pdata(struct arizona *arizona)
pdata->hpdet_channel = ARIZONA_ACCDET_MODE_HPL;
}
device_property_read_u32(arizona->dev, "wlf,micd-detect-debounce",
&pdata->micd_detect_debounce);
device_property_read_u32(arizona->dev, "wlf,micd-bias-start-time",
&pdata->micd_bias_start_time);
device_property_read_u32(arizona->dev, "wlf,micd-rate",
&pdata->micd_rate);
device_property_read_u32(arizona->dev, "wlf,micd-dbtime",
&pdata->micd_dbtime);
device_property_read_u32(arizona->dev, "wlf,micd-timeout",
&pdata->micd_timeout);
pdata->micd_force_micbias = device_property_read_bool(arizona->dev,
"wlf,micd-force-micbias");
return 0;
}
@ -1147,10 +1182,8 @@ static int arizona_extcon_probe(struct platform_device *pdev)
if (!info)
return -ENOMEM;
if (IS_ENABLED(CONFIG_OF)) {
if (!dev_get_platdata(arizona->dev))
arizona_extcon_of_get_pdata(arizona);
}
if (!dev_get_platdata(arizona->dev))
arizona_extcon_device_get_pdata(arizona);
info->micvdd = devm_regulator_get(&pdev->dev, "MICVDD");
if (IS_ERR(info->micvdd)) {
@ -1241,6 +1274,27 @@ static int arizona_extcon_probe(struct platform_device *pdev)
arizona->pdata.micd_pol_gpio, ret);
goto err_register;
}
} else {
if (info->micd_modes[0].gpio)
mode = GPIOD_OUT_HIGH;
else
mode = GPIOD_OUT_LOW;
/* We can't use devm here because we need to do the get
* against the MFD device, as that is where the of_node
* will reside, but if we devm against that the GPIO
* will not be freed if the extcon driver is unloaded.
*/
info->micd_pol_gpio = gpiod_get_optional(arizona->dev,
"wlf,micd-pol",
GPIOD_OUT_LOW);
if (IS_ERR(info->micd_pol_gpio)) {
ret = PTR_ERR(info->micd_pol_gpio);
dev_err(arizona->dev,
"Failed to get microphone polarity GPIO: %d\n",
ret);
goto err_register;
}
}
if (arizona->pdata.hpdet_id_gpio > 0) {
@ -1251,7 +1305,7 @@ static int arizona_extcon_probe(struct platform_device *pdev)
if (ret != 0) {
dev_err(arizona->dev, "Failed to request GPIO%d: %d\n",
arizona->pdata.hpdet_id_gpio, ret);
goto err_register;
goto err_gpio;
}
}
@ -1267,11 +1321,19 @@ static int arizona_extcon_probe(struct platform_device *pdev)
arizona->pdata.micd_rate
<< ARIZONA_MICD_RATE_SHIFT);
if (arizona->pdata.micd_dbtime)
switch (arizona->pdata.micd_dbtime) {
case MICD_DBTIME_FOUR_READINGS:
regmap_update_bits(arizona->regmap, ARIZONA_MIC_DETECT_1,
ARIZONA_MICD_DBTIME_MASK,
arizona->pdata.micd_dbtime
<< ARIZONA_MICD_DBTIME_SHIFT);
ARIZONA_MICD_DBTIME);
break;
case MICD_DBTIME_TWO_READINGS:
regmap_update_bits(arizona->regmap, ARIZONA_MIC_DETECT_1,
ARIZONA_MICD_DBTIME_MASK, 0);
break;
default:
break;
}
BUILD_BUG_ON(ARRAY_SIZE(arizona_micd_levels) != 0x40);
@ -1295,7 +1357,7 @@ static int arizona_extcon_probe(struct platform_device *pdev)
dev_err(arizona->dev,
"MICD ranges must be sorted\n");
ret = -EINVAL;
goto err_input;
goto err_gpio;
}
}
}
@ -1314,7 +1376,7 @@ static int arizona_extcon_probe(struct platform_device *pdev)
dev_err(arizona->dev, "Unsupported MICD level %d\n",
info->micd_ranges[i].max);
ret = -EINVAL;
goto err_input;
goto err_gpio;
}
dev_dbg(arizona->dev, "%d ohms for MICD threshold %d\n",
@ -1387,7 +1449,7 @@ static int arizona_extcon_probe(struct platform_device *pdev)
if (ret != 0) {
dev_err(&pdev->dev, "Failed to get JACKDET rise IRQ: %d\n",
ret);
goto err_input;
goto err_gpio;
}
ret = arizona_set_irq_wake(arizona, jack_irq_rise, 1);
@ -1458,7 +1520,8 @@ err_rise_wake:
arizona_set_irq_wake(arizona, jack_irq_rise, 0);
err_rise:
arizona_free_irq(arizona, jack_irq_rise, info);
err_input:
err_gpio:
gpiod_put(info->micd_pol_gpio);
err_register:
pm_runtime_disable(&pdev->dev);
return ret;
@ -1470,6 +1533,8 @@ static int arizona_extcon_remove(struct platform_device *pdev)
struct arizona *arizona = info->arizona;
int jack_irq_rise, jack_irq_fall;
gpiod_put(info->micd_pol_gpio);
pm_runtime_disable(&pdev->dev);
regmap_update_bits(arizona->regmap,

18
drivers/extcon/extcon-gpio.c
View File

@ -65,22 +65,6 @@ static irqreturn_t gpio_irq_handler(int irq, void *dev_id)
return IRQ_HANDLED;
}
static ssize_t extcon_gpio_print_state(struct extcon_dev *edev, char *buf)
{
struct device *dev = edev->dev.parent;
struct gpio_extcon_data *extcon_data = dev_get_drvdata(dev);
const char *state;
if (extcon_get_state(edev))
state = extcon_data->state_on;
else
state = extcon_data->state_off;
if (state)
return sprintf(buf, "%s\n", state);
return -EINVAL;
}
static int gpio_extcon_probe(struct platform_device *pdev)
{
struct gpio_extcon_platform_data *pdata = dev_get_platdata(&pdev->dev);
@ -110,8 +94,6 @@ static int gpio_extcon_probe(struct platform_device *pdev)
extcon_data->state_on = pdata->state_on;
extcon_data->state_off = pdata->state_off;
extcon_data->check_on_resume = pdata->check_on_resume;
if (pdata->state_on && pdata->state_off)
extcon_data->edev->print_state = extcon_gpio_print_state;
ret = devm_gpio_request_one(&pdev->dev, extcon_data->gpio, GPIOF_DIR_IN,
pdev->name);

9
drivers/extcon/extcon-max77843.c
View File

@ -781,6 +781,15 @@ static int max77843_muic_probe(struct platform_device *pdev)
/* Support virtual irq domain for max77843 MUIC device */
INIT_WORK(&info->irq_work, max77843_muic_irq_work);
/* Clear IRQ bits before request IRQs */
ret = regmap_bulk_read(max77843->regmap_muic,
MAX77843_MUIC_REG_INT1, info->status,
MAX77843_MUIC_IRQ_NUM);
if (ret) {
dev_err(&pdev->dev, "Failed to Clear IRQ bits\n");
goto err_muic_irq;
}
for (i = 0; i < ARRAY_SIZE(max77843_muic_irqs); i++) {
struct max77843_muic_irq *muic_irq = &max77843_muic_irqs[i];
unsigned int virq = 0;

134
drivers/extcon/extcon-palmas.c
View File

@ -28,6 +28,11 @@
#include <linux/mfd/palmas.h>
#include <linux/of.h>
#include <linux/of_platform.h>
#include <linux/of_gpio.h>
#include <linux/gpio/consumer.h>
#include <linux/workqueue.h>
#define USB_GPIO_DEBOUNCE_MS 20 /* ms */
static const unsigned int palmas_extcon_cable[] = {
EXTCON_USB,
@ -35,8 +40,6 @@ static const unsigned int palmas_extcon_cable[] = {
EXTCON_NONE,
};
static const int mutually_exclusive[] = {0x3, 0x0};
static void palmas_usb_wakeup(struct palmas *palmas, int enable)
{
if (enable)
@ -120,19 +123,54 @@ static irqreturn_t palmas_id_irq_handler(int irq, void *_palmas_usb)
return IRQ_HANDLED;
}
static void palmas_gpio_id_detect(struct work_struct *work)
{
int id;
struct palmas_usb *palmas_usb = container_of(to_delayed_work(work),
struct palmas_usb,
wq_detectid);
struct extcon_dev *edev = palmas_usb->edev;
if (!palmas_usb->id_gpiod)
return;
id = gpiod_get_value_cansleep(palmas_usb->id_gpiod);
if (id) {
extcon_set_cable_state_(edev, EXTCON_USB_HOST, false);
dev_info(palmas_usb->dev, "USB-HOST cable is detached\n");
} else {
extcon_set_cable_state_(edev, EXTCON_USB_HOST, true);
dev_info(palmas_usb->dev, "USB-HOST cable is attached\n");
}
}
static irqreturn_t palmas_gpio_id_irq_handler(int irq, void *_palmas_usb)
{
struct palmas_usb *palmas_usb = _palmas_usb;
queue_delayed_work(system_power_efficient_wq, &palmas_usb->wq_detectid,
palmas_usb->sw_debounce_jiffies);
return IRQ_HANDLED;
}
static void palmas_enable_irq(struct palmas_usb *palmas_usb)
{
palmas_write(palmas_usb->palmas, PALMAS_USB_OTG_BASE,
PALMAS_USB_VBUS_CTRL_SET,
PALMAS_USB_VBUS_CTRL_SET_VBUS_ACT_COMP);
palmas_write(palmas_usb->palmas, PALMAS_USB_OTG_BASE,
PALMAS_USB_ID_CTRL_SET, PALMAS_USB_ID_CTRL_SET_ID_ACT_COMP);
if (palmas_usb->enable_id_detection) {
palmas_write(palmas_usb->palmas, PALMAS_USB_OTG_BASE,
PALMAS_USB_ID_CTRL_SET,
PALMAS_USB_ID_CTRL_SET_ID_ACT_COMP);
palmas_write(palmas_usb->palmas, PALMAS_USB_OTG_BASE,
PALMAS_USB_ID_INT_EN_HI_SET,
PALMAS_USB_ID_INT_EN_HI_SET_ID_GND |
PALMAS_USB_ID_INT_EN_HI_SET_ID_FLOAT);
palmas_write(palmas_usb->palmas, PALMAS_USB_OTG_BASE,
PALMAS_USB_ID_INT_EN_HI_SET,
PALMAS_USB_ID_INT_EN_HI_SET_ID_GND |
PALMAS_USB_ID_INT_EN_HI_SET_ID_FLOAT);
}
if (palmas_usb->enable_vbus_detection)
palmas_vbus_irq_handler(palmas_usb->vbus_irq, palmas_usb);
@ -171,20 +209,37 @@ static int palmas_usb_probe(struct platform_device *pdev)
palmas_usb->wakeup = pdata->wakeup;
}
palmas_usb->id_gpiod = devm_gpiod_get_optional(&pdev->dev, "id",
GPIOD_IN);
if (IS_ERR(palmas_usb->id_gpiod)) {
dev_err(&pdev->dev, "failed to get id gpio\n");
return PTR_ERR(palmas_usb->id_gpiod);
}
if (palmas_usb->enable_id_detection && palmas_usb->id_gpiod) {
palmas_usb->enable_id_detection = false;
palmas_usb->enable_gpio_id_detection = true;
}
if (palmas_usb->enable_gpio_id_detection) {
u32 debounce;
if (of_property_read_u32(node, "debounce-delay-ms", &debounce))
debounce = USB_GPIO_DEBOUNCE_MS;
status = gpiod_set_debounce(palmas_usb->id_gpiod,
debounce * 1000);
if (status < 0)
palmas_usb->sw_debounce_jiffies = msecs_to_jiffies(debounce);
}
INIT_DELAYED_WORK(&palmas_usb->wq_detectid, palmas_gpio_id_detect);
palmas->usb = palmas_usb;
palmas_usb->palmas = palmas;
palmas_usb->dev = &pdev->dev;
palmas_usb->id_otg_irq = regmap_irq_get_virq(palmas->irq_data,
PALMAS_ID_OTG_IRQ);
palmas_usb->id_irq = regmap_irq_get_virq(palmas->irq_data,
PALMAS_ID_IRQ);
palmas_usb->vbus_otg_irq = regmap_irq_get_virq(palmas->irq_data,
PALMAS_VBUS_OTG_IRQ);
palmas_usb->vbus_irq = regmap_irq_get_virq(palmas->irq_data,
PALMAS_VBUS_IRQ);
palmas_usb_wakeup(palmas, palmas_usb->wakeup);
platform_set_drvdata(pdev, palmas_usb);
@ -195,7 +250,6 @@ static int palmas_usb_probe(struct platform_device *pdev)
dev_err(&pdev->dev, "failed to allocate extcon device\n");
return -ENOMEM;
}
palmas_usb->edev->mutually_exclusive = mutually_exclusive;
status = devm_extcon_dev_register(&pdev->dev, palmas_usb->edev);
if (status) {
@ -204,6 +258,10 @@ static int palmas_usb_probe(struct platform_device *pdev)
}
if (palmas_usb->enable_id_detection) {
palmas_usb->id_otg_irq = regmap_irq_get_virq(palmas->irq_data,
PALMAS_ID_OTG_IRQ);
palmas_usb->id_irq = regmap_irq_get_virq(palmas->irq_data,
PALMAS_ID_IRQ);
status = devm_request_threaded_irq(palmas_usb->dev,
palmas_usb->id_irq,
NULL, palmas_id_irq_handler,
@ -215,9 +273,33 @@ static int palmas_usb_probe(struct platform_device *pdev)
palmas_usb->id_irq, status);
return status;
}
} else if (palmas_usb->enable_gpio_id_detection) {
palmas_usb->gpio_id_irq = gpiod_to_irq(palmas_usb->id_gpiod);
if (palmas_usb->gpio_id_irq < 0) {
dev_err(&pdev->dev, "failed to get id irq\n");
return palmas_usb->gpio_id_irq;
}
status = devm_request_threaded_irq(&pdev->dev,
palmas_usb->gpio_id_irq,
NULL,
palmas_gpio_id_irq_handler,
IRQF_TRIGGER_RISING |
IRQF_TRIGGER_FALLING |
IRQF_ONESHOT,
"palmas_usb_id",
palmas_usb);
if (status < 0) {
dev_err(&pdev->dev,
"failed to request handler for id irq\n");
return status;
}
}
if (palmas_usb->enable_vbus_detection) {
palmas_usb->vbus_otg_irq = regmap_irq_get_virq(palmas->irq_data,
PALMAS_VBUS_OTG_IRQ);
palmas_usb->vbus_irq = regmap_irq_get_virq(palmas->irq_data,
PALMAS_VBUS_IRQ);
status = devm_request_threaded_irq(palmas_usb->dev,
palmas_usb->vbus_irq, NULL,
palmas_vbus_irq_handler,
@ -232,10 +314,21 @@ static int palmas_usb_probe(struct platform_device *pdev)
}
palmas_enable_irq(palmas_usb);
/* perform initial detection */
palmas_gpio_id_detect(&palmas_usb->wq_detectid.work);
device_set_wakeup_capable(&pdev->dev, true);
return 0;
}
static int palmas_usb_remove(struct platform_device *pdev)
{
struct palmas_usb *palmas_usb = platform_get_drvdata(pdev);
cancel_delayed_work_sync(&palmas_usb->wq_detectid);
return 0;
}
#ifdef CONFIG_PM_SLEEP
static int palmas_usb_suspend(struct device *dev)
{
@ -246,6 +339,8 @@ static int palmas_usb_suspend(struct device *dev)
enable_irq_wake(palmas_usb->vbus_irq);
if (palmas_usb->enable_id_detection)
enable_irq_wake(palmas_usb->id_irq);
if (palmas_usb->enable_gpio_id_detection)
enable_irq_wake(palmas_usb->gpio_id_irq);
}
return 0;
}
@ -259,6 +354,8 @@ static int palmas_usb_resume(struct device *dev)
disable_irq_wake(palmas_usb->vbus_irq);
if (palmas_usb->enable_id_detection)
disable_irq_wake(palmas_usb->id_irq);
if (palmas_usb->enable_gpio_id_detection)
disable_irq_wake(palmas_usb->gpio_id_irq);
}
return 0;
};
@ -276,6 +373,7 @@ static const struct of_device_id of_palmas_match_tbl[] = {
static struct platform_driver palmas_usb_driver = {
.probe = palmas_usb_probe,
.remove = palmas_usb_remove,
.driver = {
.name = "palmas-usb",
.of_match_table = of_palmas_match_tbl,

1
drivers/extcon/extcon-rt8973a.c
View File

@ -693,7 +693,6 @@ MODULE_DEVICE_TABLE(i2c, rt8973a_i2c_id);
static struct i2c_driver rt8973a_muic_i2c_driver = {
.driver = {
.name = "rt8973a",
.owner = THIS_MODULE,
.pm = &rt8973a_muic_pm_ops,
.of_match_table = rt8973a_dt_match,
},

1
drivers/extcon/extcon-sm5502.c
View File

@ -685,7 +685,6 @@ MODULE_DEVICE_TABLE(i2c, sm5502_i2c_id);
static struct i2c_driver sm5502_muic_i2c_driver = {
.driver = {
.name = "sm5502",
.owner = THIS_MODULE,
.pm = &sm5502_muic_pm_ops,
.of_match_table = sm5502_dt_match,
},

1
drivers/extcon/extcon-usb-gpio.c
View File

@ -15,6 +15,7 @@
*/
#include <linux/extcon.h>
#include <linux/gpio.h>
#include <linux/gpio/consumer.h>
#include <linux/init.h>
#include <linux/interrupt.h>

48
drivers/extcon/extcon.c
View File

@ -126,7 +126,7 @@ static int find_cable_index_by_id(struct extcon_dev *edev, const unsigned int id
static int find_cable_id_by_name(struct extcon_dev *edev, const char *name)
{
unsigned int id = -EINVAL;
int id = -EINVAL;
int i = 0;
/* Find the id of extcon cable */
@ -143,7 +143,7 @@ static int find_cable_id_by_name(struct extcon_dev *edev, const char *name)
static int find_cable_index_by_name(struct extcon_dev *edev, const char *name)
{
unsigned int id;
int id;
if (edev->max_supported == 0)
return -EINVAL;
@ -172,14 +172,6 @@ static ssize_t state_show(struct device *dev, struct device_attribute *attr,
int i, count = 0;
struct extcon_dev *edev = dev_get_drvdata(dev);
if (edev->print_state) {
int ret = edev->print_state(edev, buf);
if (ret >= 0)
return ret;
/* Use default if failed */
}
if (edev->max_supported == 0)
return sprintf(buf, "%u\n", edev->state);
@ -272,6 +264,9 @@ int extcon_update_state(struct extcon_dev *edev, u32 mask, u32 state)
unsigned long flags;
bool attached;
if (!edev)
return -EINVAL;
spin_lock_irqsave(&edev->lock, flags);
if (edev->state != ((edev->state & ~mask) | (state & mask))) {
@ -345,6 +340,9 @@ EXPORT_SYMBOL_GPL(extcon_update_state);
*/
int extcon_set_state(struct extcon_dev *edev, u32 state)
{
if (!edev)
return -EINVAL;
return extcon_update_state(edev, 0xffffffff, state);
}
EXPORT_SYMBOL_GPL(extcon_set_state);
@ -358,6 +356,9 @@ int extcon_get_cable_state_(struct extcon_dev *edev, const unsigned int id)
{
int index;
if (!edev)
return -EINVAL;
index = find_cable_index_by_id(edev, id);
if (index < 0)
return index;
@ -378,7 +379,7 @@ EXPORT_SYMBOL_GPL(extcon_get_cable_state_);
*/
int extcon_get_cable_state(struct extcon_dev *edev, const char *cable_name)
{
unsigned int id;
int id;
id = find_cable_id_by_name(edev, cable_name);
if (id < 0)
@ -402,6 +403,9 @@ int extcon_set_cable_state_(struct extcon_dev *edev, unsigned int id,
u32 state;
int index;
if (!edev)
return -EINVAL;
index = find_cable_index_by_id(edev, id);
if (index < 0)
return index;
@ -426,7 +430,7 @@ EXPORT_SYMBOL_GPL(extcon_set_cable_state_);
int extcon_set_cable_state(struct extcon_dev *edev,
const char *cable_name, bool cable_state)
{
unsigned int id;
int id;
id = find_cable_id_by_name(edev, cable_name);
if (id < 0)
@ -444,6 +448,9 @@ struct extcon_dev *extcon_get_extcon_dev(const char *extcon_name)
{
struct extcon_dev *sd;
if (!extcon_name)
return ERR_PTR(-EINVAL);
mutex_lock(&extcon_dev_list_lock);
list_for_each_entry(sd, &extcon_dev_list, entry) {
if (!strcmp(sd->name, extcon_name))
@ -572,6 +579,9 @@ int extcon_register_notifier(struct extcon_dev *edev, unsigned int id,
unsigned long flags;
int ret, idx;
if (!edev || !nb)
return -EINVAL;
idx = find_cable_index_by_id(edev, id);
spin_lock_irqsave(&edev->lock, flags);
@ -594,6 +604,9 @@ int extcon_unregister_notifier(struct extcon_dev *edev, unsigned int id,
unsigned long flags;
int ret, idx;
if (!edev || !nb)
return -EINVAL;
idx = find_cable_index_by_id(edev, id);
spin_lock_irqsave(&edev->lock, flags);
@ -654,6 +667,9 @@ struct extcon_dev *extcon_dev_allocate(const unsigned int *supported_cable)
{
struct extcon_dev *edev;
if (!supported_cable)
return ERR_PTR(-EINVAL);
edev = kzalloc(sizeof(*edev), GFP_KERNEL);
if (!edev)
return ERR_PTR(-ENOMEM);
@ -754,7 +770,7 @@ int extcon_dev_register(struct extcon_dev *edev)
return ret;
}
if (!edev->supported_cable)
if (!edev || !edev->supported_cable)
return -EINVAL;
for (; edev->supported_cable[index] != EXTCON_NONE; index++);
@ -960,6 +976,9 @@ void extcon_dev_unregister(struct extcon_dev *edev)
{
int index;
if (!edev)
return;
mutex_lock(&extcon_dev_list_lock);
list_del(&edev->entry);
mutex_unlock(&extcon_dev_list_lock);
@ -1066,6 +1085,9 @@ struct extcon_dev *extcon_get_edev_by_phandle(struct device *dev, int index)
struct device_node *node;
struct extcon_dev *edev;
if (!dev)
return ERR_PTR(-EINVAL);
if (!dev->of_node) {
dev_err(dev, "device does not have a device node entry\n");
return ERR_PTR(-EINVAL);

4
drivers/hv/channel.c
View File

@ -601,6 +601,7 @@ int vmbus_sendpacket_ctl(struct vmbus_channel *channel, void *buffer,
u64 aligned_data = 0;
int ret;
bool signal = false;
int num_vecs = ((bufferlen != 0) ? 3 : 1);
/* Setup the descriptor */
@ -618,7 +619,8 @@ int vmbus_sendpacket_ctl(struct vmbus_channel *channel, void *buffer,
bufferlist[2].iov_base = &aligned_data;
bufferlist[2].iov_len = (packetlen_aligned - packetlen);
ret = hv_ringbuffer_write(&channel->outbound, bufferlist, 3, &signal);
ret = hv_ringbuffer_write(&channel->outbound, bufferlist, num_vecs,
&signal);
/*
* Signalling the host is conditional on many factors:

34
drivers/hv/channel_mgmt.c
View File

@ -347,6 +347,7 @@ enum {
IDE = 0,
SCSI,
NIC,
ND_NIC,
MAX_PERF_CHN,
};
@ -391,6 +392,7 @@ static void init_vp_index(struct vmbus_channel *channel, const uuid_le *type_gui
struct vmbus_channel *primary = channel->primary_channel;
int next_node;
struct cpumask available_mask;
struct cpumask *alloced_mask;
for (i = IDE; i < MAX_PERF_CHN; i++) {
if (!memcmp(type_guid->b, hp_devs[i].guid,
@ -408,7 +410,6 @@ static void init_vp_index(struct vmbus_channel *channel, const uuid_le *type_gui
* channel, bind it to cpu 0.
*/
channel->numa_node = 0;
cpumask_set_cpu(0, &channel->alloced_cpus_in_node);
channel->target_cpu = 0;
channel->target_vp = hv_context.vp_index[0];
return;
@ -433,21 +434,38 @@ static void init_vp_index(struct vmbus_channel *channel, const uuid_le *type_gui
channel->numa_node = next_node;
primary = channel;
}
alloced_mask = &hv_context.hv_numa_map[primary->numa_node];
if (cpumask_weight(&primary->alloced_cpus_in_node) ==
if (cpumask_weight(alloced_mask) ==
cpumask_weight(cpumask_of_node(primary->numa_node))) {
/*
* We have cycled through all the CPUs in the node;
* reset the alloced map.
*/
cpumask_clear(&primary->alloced_cpus_in_node);
cpumask_clear(alloced_mask);
}
cpumask_xor(&available_mask, &primary->alloced_cpus_in_node,
cpumask_xor(&available_mask, alloced_mask,
cpumask_of_node(primary->numa_node));
cur_cpu = cpumask_next(-1, &available_mask);
cpumask_set_cpu(cur_cpu, &primary->alloced_cpus_in_node);
cur_cpu = -1;
while (true) {
cur_cpu = cpumask_next(cur_cpu, &available_mask);
if (cur_cpu >= nr_cpu_ids) {
cur_cpu = -1;
cpumask_copy(&available_mask,
cpumask_of_node(primary->numa_node));
continue;
}
if (!cpumask_test_cpu(cur_cpu,
&primary->alloced_cpus_in_node)) {
cpumask_set_cpu(cur_cpu,
&primary->alloced_cpus_in_node);
cpumask_set_cpu(cur_cpu, alloced_mask);
break;
}
}
channel->target_cpu = cur_cpu;
channel->target_vp = hv_context.vp_index[cur_cpu];
@ -469,6 +487,10 @@ void vmbus_initiate_unload(void)
{
struct vmbus_channel_message_header hdr;
/* Pre-Win2012R2 hosts don't support reconnect */
if (vmbus_proto_version < VERSION_WIN8_1)
return;
init_completion(&vmbus_connection.unload_event);
memset(&hdr, 0, sizeof(struct vmbus_channel_message_header));
hdr.msgtype = CHANNELMSG_UNLOAD;

150
drivers/hv/hv.c
View File

@ -93,11 +93,14 @@ static int query_hypervisor_info(void)
*/
static u64 do_hypercall(u64 control, void *input, void *output)
{
#ifdef CONFIG_X86_64
u64 hv_status = 0;
u64 input_address = (input) ? virt_to_phys(input) : 0;
u64 output_address = (output) ? virt_to_phys(output) : 0;
void *hypercall_page = hv_context.hypercall_page;
#ifdef CONFIG_X86_64
u64 hv_status = 0;
if (!hypercall_page)
return (u64)ULLONG_MAX;
__asm__ __volatile__("mov %0, %%r8" : : "r" (output_address) : "r8");
__asm__ __volatile__("call *%3" : "=a" (hv_status) :
@ -112,13 +115,13 @@ static u64 do_hypercall(u64 control, void *input, void *output)
u32 control_lo = control & 0xFFFFFFFF;
u32 hv_status_hi = 1;
u32 hv_status_lo = 1;
u64 input_address = (input) ? virt_to_phys(input) : 0;
u32 input_address_hi = input_address >> 32;
u32 input_address_lo = input_address & 0xFFFFFFFF;
u64 output_address = (output) ? virt_to_phys(output) : 0;
u32 output_address_hi = output_address >> 32;
u32 output_address_lo = output_address & 0xFFFFFFFF;
void *hypercall_page = hv_context.hypercall_page;
if (!hypercall_page)
return (u64)ULLONG_MAX;
__asm__ __volatile__ ("call *%8" : "=d"(hv_status_hi),
"=a"(hv_status_lo) : "d" (control_hi),
@ -130,6 +133,56 @@ static u64 do_hypercall(u64 control, void *input, void *output)
#endif /* !x86_64 */
}
#ifdef CONFIG_X86_64
static cycle_t read_hv_clock_tsc(struct clocksource *arg)
{
cycle_t current_tick;
struct ms_hyperv_tsc_page *tsc_pg = hv_context.tsc_page;
if (tsc_pg->tsc_sequence != -1) {
/*
* Use the tsc page to compute the value.
*/
while (1) {
cycle_t tmp;
u32 sequence = tsc_pg->tsc_sequence;
u64 cur_tsc;
u64 scale = tsc_pg->tsc_scale;
s64 offset = tsc_pg->tsc_offset;
rdtscll(cur_tsc);
/* current_tick = ((cur_tsc *scale) >> 64) + offset */
asm("mulq %3"
: "=d" (current_tick), "=a" (tmp)
: "a" (cur_tsc), "r" (scale));
current_tick += offset;
if (tsc_pg->tsc_sequence == sequence)
return current_tick;
if (tsc_pg->tsc_sequence != -1)
continue;
/*
* Fallback using MSR method.
*/
break;
}
}
rdmsrl(HV_X64_MSR_TIME_REF_COUNT, current_tick);
return current_tick;
}
static struct clocksource hyperv_cs_tsc = {
.name = "hyperv_clocksource_tsc_page",
.rating = 425,
.read = read_hv_clock_tsc,
.mask = CLOCKSOURCE_MASK(64),
.flags = CLOCK_SOURCE_IS_CONTINUOUS,
};
#endif
/*
* hv_init - Main initialization routine.
*
@ -139,7 +192,9 @@ int hv_init(void)
{
int max_leaf;
union hv_x64_msr_hypercall_contents hypercall_msr;
union hv_x64_msr_hypercall_contents tsc_msr;
void *virtaddr = NULL;
void *va_tsc = NULL;
memset(hv_context.synic_event_page, 0, sizeof(void *) * NR_CPUS);
memset(hv_context.synic_message_page, 0,
@ -183,6 +238,22 @@ int hv_init(void)
hv_context.hypercall_page = virtaddr;
#ifdef CONFIG_X86_64
if (ms_hyperv.features & HV_X64_MSR_REFERENCE_TSC_AVAILABLE) {
va_tsc = __vmalloc(PAGE_SIZE, GFP_KERNEL, PAGE_KERNEL);
if (!va_tsc)
goto cleanup;
hv_context.tsc_page = va_tsc;
rdmsrl(HV_X64_MSR_REFERENCE_TSC, tsc_msr.as_uint64);
tsc_msr.enable = 1;
tsc_msr.guest_physical_address = vmalloc_to_pfn(va_tsc);
wrmsrl(HV_X64_MSR_REFERENCE_TSC, tsc_msr.as_uint64);
clocksource_register_hz(&hyperv_cs_tsc, NSEC_PER_SEC/100);
}
#endif
return 0;
cleanup:
@ -216,6 +287,21 @@ void hv_cleanup(void)
vfree(hv_context.hypercall_page);
hv_context.hypercall_page = NULL;
}
#ifdef CONFIG_X86_64
/*
* Cleanup the TSC page based CS.
*/
if (ms_hyperv.features & HV_X64_MSR_REFERENCE_TSC_AVAILABLE) {
clocksource_change_rating(&hyperv_cs_tsc, 10);
clocksource_unregister(&hyperv_cs_tsc);
hypercall_msr.as_uint64 = 0;
wrmsrl(HV_X64_MSR_REFERENCE_TSC, hypercall_msr.as_uint64);
vfree(hv_context.tsc_page);
hv_context.tsc_page = NULL;
}
#endif
}
/*
@ -271,7 +357,7 @@ static int hv_ce_set_next_event(unsigned long delta,
{
cycle_t current_tick;
WARN_ON(evt->mode != CLOCK_EVT_MODE_ONESHOT);
WARN_ON(!clockevent_state_oneshot(evt));
rdmsrl(HV_X64_MSR_TIME_REF_COUNT, current_tick);
current_tick += delta;
@ -279,31 +365,24 @@ static int hv_ce_set_next_event(unsigned long delta,
return 0;
}
static void hv_ce_setmode(enum clock_event_mode mode,
struct clock_event_device *evt)
static int hv_ce_shutdown(struct clock_event_device *evt)
{
wrmsrl(HV_X64_MSR_STIMER0_COUNT, 0);
wrmsrl(HV_X64_MSR_STIMER0_CONFIG, 0);
return 0;
}
static int hv_ce_set_oneshot(struct clock_event_device *evt)
{
union hv_timer_config timer_cfg;
switch (mode) {
case CLOCK_EVT_MODE_PERIODIC:
/* unsupported */
break;
timer_cfg.enable = 1;
timer_cfg.auto_enable = 1;
timer_cfg.sintx = VMBUS_MESSAGE_SINT;
wrmsrl(HV_X64_MSR_STIMER0_CONFIG, timer_cfg.as_uint64);
case CLOCK_EVT_MODE_ONESHOT:
timer_cfg.enable = 1;
timer_cfg.auto_enable = 1;
timer_cfg.sintx = VMBUS_MESSAGE_SINT;
wrmsrl(HV_X64_MSR_STIMER0_CONFIG, timer_cfg.as_uint64);
break;
case CLOCK_EVT_MODE_UNUSED:
case CLOCK_EVT_MODE_SHUTDOWN:
wrmsrl(HV_X64_MSR_STIMER0_COUNT, 0);
wrmsrl(HV_X64_MSR_STIMER0_CONFIG, 0);
break;
case CLOCK_EVT_MODE_RESUME:
break;
}
return 0;
}
static void hv_init_clockevent_device(struct clock_event_device *dev, int cpu)
@ -318,7 +397,8 @@ static void hv_init_clockevent_device(struct clock_event_device *dev, int cpu)
* references to the hv_vmbus module making it impossible to unload.
*/
dev->set_mode = hv_ce_setmode;
dev->set_state_shutdown = hv_ce_shutdown;
dev->set_state_oneshot = hv_ce_set_oneshot;
dev->set_next_event = hv_ce_set_next_event;
}
@ -329,6 +409,13 @@ int hv_synic_alloc(void)
size_t ced_size = sizeof(struct clock_event_device);
int cpu;
hv_context.hv_numa_map = kzalloc(sizeof(struct cpumask) * nr_node_ids,
GFP_ATOMIC);
if (hv_context.hv_numa_map == NULL) {
pr_err("Unable to allocate NUMA map\n");
goto err;
}
for_each_online_cpu(cpu) {
hv_context.event_dpc[cpu] = kmalloc(size, GFP_ATOMIC);
if (hv_context.event_dpc[cpu] == NULL) {
@ -342,6 +429,7 @@ int hv_synic_alloc(void)
pr_err("Unable to allocate clock event device\n");
goto err;
}
hv_init_clockevent_device(hv_context.clk_evt[cpu], cpu);
hv_context.synic_message_page[cpu] =
@ -390,6 +478,7 @@ void hv_synic_free(void)
{
int cpu;
kfree(hv_context.hv_numa_map);
for_each_online_cpu(cpu)
hv_synic_free_cpu(cpu);
}
@ -503,8 +592,7 @@ void hv_synic_cleanup(void *arg)
/* Turn off clockevent device */
if (ms_hyperv.features & HV_X64_MSR_SYNTIMER_AVAILABLE)
hv_ce_setmode(CLOCK_EVT_MODE_SHUTDOWN,
hv_context.clk_evt[cpu]);
hv_ce_shutdown(hv_context.clk_evt[cpu]);
rdmsrl(HV_X64_MSR_SINT0 + VMBUS_MESSAGE_SINT, shared_sint.as_uint64);
@ -530,6 +618,4 @@ void hv_synic_cleanup(void *arg)
rdmsrl(HV_X64_MSR_SCONTROL, sctrl.as_uint64);
sctrl.enable = 0;
wrmsrl(HV_X64_MSR_SCONTROL, sctrl.as_uint64);
hv_synic_free_cpu(cpu);
}

26
drivers/hv/hv_balloon.c
View File

@ -62,11 +62,13 @@
enum {
DYNMEM_PROTOCOL_VERSION_1 = DYNMEM_MAKE_VERSION(0, 3),
DYNMEM_PROTOCOL_VERSION_2 = DYNMEM_MAKE_VERSION(1, 0),
DYNMEM_PROTOCOL_VERSION_3 = DYNMEM_MAKE_VERSION(2, 0),
DYNMEM_PROTOCOL_VERSION_WIN7 = DYNMEM_PROTOCOL_VERSION_1,
DYNMEM_PROTOCOL_VERSION_WIN8 = DYNMEM_PROTOCOL_VERSION_2,
DYNMEM_PROTOCOL_VERSION_WIN10 = DYNMEM_PROTOCOL_VERSION_3,
DYNMEM_PROTOCOL_VERSION_CURRENT = DYNMEM_PROTOCOL_VERSION_WIN8
DYNMEM_PROTOCOL_VERSION_CURRENT = DYNMEM_PROTOCOL_VERSION_WIN10
};
@ -1296,13 +1298,25 @@ static void version_resp(struct hv_dynmem_device *dm,
if (dm->next_version == 0)
goto version_error;
dm->next_version = 0;
memset(&version_req, 0, sizeof(struct dm_version_request));
version_req.hdr.type = DM_VERSION_REQUEST;
version_req.hdr.size = sizeof(struct dm_version_request);
version_req.hdr.trans_id = atomic_inc_return(&trans_id);
version_req.version.version = DYNMEM_PROTOCOL_VERSION_WIN7;
version_req.is_last_attempt = 1;
version_req.version.version = dm->next_version;
/*
* Set the next version to try in case current version fails.
* Win7 protocol ought to be the last one to try.
*/
switch (version_req.version.version) {
case DYNMEM_PROTOCOL_VERSION_WIN8:
dm->next_version = DYNMEM_PROTOCOL_VERSION_WIN7;
version_req.is_last_attempt = 0;
break;
default:
dm->next_version = 0;
version_req.is_last_attempt = 1;
}
ret = vmbus_sendpacket(dm->dev->channel, &version_req,
sizeof(struct dm_version_request),
@ -1442,7 +1456,7 @@ static int balloon_probe(struct hv_device *dev,
dm_device.dev = dev;
dm_device.state = DM_INITIALIZING;
dm_device.next_version = DYNMEM_PROTOCOL_VERSION_WIN7;
dm_device.next_version = DYNMEM_PROTOCOL_VERSION_WIN8;
init_completion(&dm_device.host_event);
init_completion(&dm_device.config_event);
INIT_LIST_HEAD(&dm_device.ha_region_list);
@ -1474,7 +1488,7 @@ static int balloon_probe(struct hv_device *dev,
version_req.hdr.type = DM_VERSION_REQUEST;
version_req.hdr.size = sizeof(struct dm_version_request);
version_req.hdr.trans_id = atomic_inc_return(&trans_id);
version_req.version.version = DYNMEM_PROTOCOL_VERSION_WIN8;
version_req.version.version = DYNMEM_PROTOCOL_VERSION_WIN10;
version_req.is_last_attempt = 0;
ret = vmbus_sendpacket(dev->channel, &version_req,

21
drivers/hv/hv_fcopy.c
View File

@ -116,7 +116,7 @@ static int fcopy_handle_handshake(u32 version)
static void fcopy_send_data(struct work_struct *dummy)
{
struct hv_start_fcopy smsg_out;
struct hv_start_fcopy *smsg_out = NULL;
int operation = fcopy_transaction.fcopy_msg->operation;
struct hv_start_fcopy *smsg_in;
void *out_src;
@ -136,21 +136,24 @@ static void fcopy_send_data(struct work_struct *dummy)
switch (operation) {
case START_FILE_COPY:
out_len = sizeof(struct hv_start_fcopy);
memset(&smsg_out, 0, out_len);
smsg_out.hdr.operation = operation;
smsg_out = kzalloc(sizeof(*smsg_out), GFP_KERNEL);
if (!smsg_out)
return;
smsg_out->hdr.operation = operation;
smsg_in = (struct hv_start_fcopy *)fcopy_transaction.fcopy_msg;
utf16s_to_utf8s((wchar_t *)smsg_in->file_name, W_MAX_PATH,
UTF16_LITTLE_ENDIAN,
(__u8 *)&smsg_out.file_name, W_MAX_PATH - 1);
(__u8 *)&smsg_out->file_name, W_MAX_PATH - 1);
utf16s_to_utf8s((wchar_t *)smsg_in->path_name, W_MAX_PATH,
UTF16_LITTLE_ENDIAN,
(__u8 *)&smsg_out.path_name, W_MAX_PATH - 1);
(__u8 *)&smsg_out->path_name, W_MAX_PATH - 1);
smsg_out.copy_flags = smsg_in->copy_flags;
smsg_out.file_size = smsg_in->file_size;
out_src = &smsg_out;
smsg_out->copy_flags = smsg_in->copy_flags;
smsg_out->file_size = smsg_in->file_size;
out_src = smsg_out;
break;
default:
@ -168,6 +171,8 @@ static void fcopy_send_data(struct work_struct *dummy)
fcopy_transaction.state = HVUTIL_READY;
}
}
kfree(smsg_out);
return;
}

3
drivers/hv/hv_kvp.c
View File

@ -353,6 +353,9 @@ kvp_send_key(struct work_struct *dummy)
return;
message = kzalloc(sizeof(*message), GFP_KERNEL);
if (!message)
return;
message->kvp_hdr.operation = operation;
message->kvp_hdr.pool = pool;
in_msg = kvp_transaction.kvp_msg;

2
drivers/hv/hv_utils_transport.c
View File

@ -186,7 +186,7 @@ int hvutil_transport_send(struct hvutil_transport *hvt, void *msg, int len)
return -EINVAL;
} else if (hvt->mode == HVUTIL_TRANSPORT_NETLINK) {
cn_msg = kzalloc(sizeof(*cn_msg) + len, GFP_ATOMIC);
if (!msg)
if (!cn_msg)
return -ENOMEM;
cn_msg->id.idx = hvt->cn_id.idx;
cn_msg->id.val = hvt->cn_id.val;

16
drivers/hv/hyperv_vmbus.h
View File

@ -141,7 +141,7 @@ struct hv_port_info {
struct {
u32 target_sint;
u32 target_vp;
u16 base_flag_bumber;
u16 base_flag_number;
u16 flag_count;
u32 rsvdz;
} event_port_info;
@ -517,6 +517,7 @@ struct hv_context {
u64 guestid;
void *hypercall_page;
void *tsc_page;
bool synic_initialized;
@ -551,10 +552,23 @@ struct hv_context {
* Support PV clockevent device.
*/
struct clock_event_device *clk_evt[NR_CPUS];
/*
* To manage allocations in a NUMA node.
* Array indexed by numa node ID.
*/
struct cpumask *hv_numa_map;
};
extern struct hv_context hv_context;
struct ms_hyperv_tsc_page {
volatile u32 tsc_sequence;
u32 reserved1;
volatile u64 tsc_scale;
volatile s64 tsc_offset;
u64 reserved2[509];
};
struct hv_ring_buffer_debug_info {
u32 current_interrupt_mask;
u32 current_read_index;

14
drivers/hv/ring_buffer.c
View File

@ -103,10 +103,9 @@ static bool hv_need_to_signal(u32 old_write, struct hv_ring_buffer_info *rbi)
* there is room for the producer to send the pending packet.
*/
static bool hv_need_to_signal_on_read(u32 old_rd,
struct hv_ring_buffer_info *rbi)
static bool hv_need_to_signal_on_read(u32 prev_write_sz,
struct hv_ring_buffer_info *rbi)
{
u32 prev_write_sz;
u32 cur_write_sz;
u32 r_size;
u32 write_loc = rbi->ring_buffer->write_index;
@ -123,10 +122,6 @@ static bool hv_need_to_signal_on_read(u32 old_rd,
cur_write_sz = write_loc >= read_loc ? r_size - (write_loc - read_loc) :
read_loc - write_loc;
prev_write_sz = write_loc >= old_rd ? r_size - (write_loc - old_rd) :
old_rd - write_loc;
if ((prev_write_sz < pending_sz) && (cur_write_sz >= pending_sz))
return true;
@ -517,7 +512,6 @@ int hv_ringbuffer_read(struct hv_ring_buffer_info *inring_info, void *buffer,
u32 next_read_location = 0;
u64 prev_indices = 0;
unsigned long flags;
u32 old_read;
if (buflen <= 0)
return -EINVAL;
@ -528,8 +522,6 @@ int hv_ringbuffer_read(struct hv_ring_buffer_info *inring_info, void *buffer,
&bytes_avail_toread,
&bytes_avail_towrite);
old_read = bytes_avail_toread;
/* Make sure there is something to read */
if (bytes_avail_toread < buflen) {
spin_unlock_irqrestore(&inring_info->ring_lock, flags);
@ -560,7 +552,7 @@ int hv_ringbuffer_read(struct hv_ring_buffer_info *inring_info, void *buffer,
spin_unlock_irqrestore(&inring_info->ring_lock, flags);
*signal = hv_need_to_signal_on_read(old_read, inring_info);
*signal = hv_need_to_signal_on_read(bytes_avail_towrite, inring_info);
return 0;
}

353
drivers/hv/vmbus_drv.c
View File

@ -39,6 +39,8 @@
#include <asm/mshyperv.h>
#include <linux/notifier.h>
#include <linux/ptrace.h>
#include <linux/screen_info.h>
#include <linux/kdebug.h>
#include "hyperv_vmbus.h"
static struct acpi_device *hv_acpi_dev;
@ -48,12 +50,18 @@ static struct completion probe_event;
static int irq;
static int hyperv_panic_event(struct notifier_block *nb,
unsigned long event, void *ptr)
static void hyperv_report_panic(struct pt_regs *regs)
{
struct pt_regs *regs;
static bool panic_reported;
regs = current_pt_regs();
/*
* We prefer to report panic on 'die' chain as we have proper
* registers to report, but if we miss it (e.g. on BUG()) we need
* to report it on 'panic'.
*/
if (panic_reported)
return;
panic_reported = true;
wrmsrl(HV_X64_MSR_CRASH_P0, regs->ip);
wrmsrl(HV_X64_MSR_CRASH_P1, regs->ax);
@ -65,18 +73,37 @@ static int hyperv_panic_event(struct notifier_block *nb,
* Let Hyper-V know there is crash data available
*/
wrmsrl(HV_X64_MSR_CRASH_CTL, HV_CRASH_CTL_CRASH_NOTIFY);
}
static int hyperv_panic_event(struct notifier_block *nb, unsigned long val,
void *args)
{
struct pt_regs *regs;
regs = current_pt_regs();
hyperv_report_panic(regs);
return NOTIFY_DONE;
}
static int hyperv_die_event(struct notifier_block *nb, unsigned long val,
void *args)
{
struct die_args *die = (struct die_args *)args;
struct pt_regs *regs = die->regs;
hyperv_report_panic(regs);
return NOTIFY_DONE;
}
static struct notifier_block hyperv_die_block = {
.notifier_call = hyperv_die_event,
};
static struct notifier_block hyperv_panic_block = {
.notifier_call = hyperv_panic_event,
};
struct resource hyperv_mmio = {
.name = "hyperv mmio",
.flags = IORESOURCE_MEM,
};
EXPORT_SYMBOL_GPL(hyperv_mmio);
struct resource *hyperv_mmio;
static int vmbus_exists(void)
{
@ -414,6 +441,43 @@ static ssize_t in_write_bytes_avail_show(struct device *dev,
}
static DEVICE_ATTR_RO(in_write_bytes_avail);
static ssize_t channel_vp_mapping_show(struct device *dev,
struct device_attribute *dev_attr,
char *buf)
{
struct hv_device *hv_dev = device_to_hv_device(dev);
struct vmbus_channel *channel = hv_dev->channel, *cur_sc;
unsigned long flags;
int buf_size = PAGE_SIZE, n_written, tot_written;
struct list_head *cur;
if (!channel)
return -ENODEV;
tot_written = snprintf(buf, buf_size, "%u:%u\n",
channel->offermsg.child_relid, channel->target_cpu);
spin_lock_irqsave(&channel->lock, flags);
list_for_each(cur, &channel->sc_list) {
if (tot_written >= buf_size - 1)
break;
cur_sc = list_entry(cur, struct vmbus_channel, sc_list);
n_written = scnprintf(buf + tot_written,
buf_size - tot_written,
"%u:%u\n",
cur_sc->offermsg.child_relid,
cur_sc->target_cpu);
tot_written += n_written;
}
spin_unlock_irqrestore(&channel->lock, flags);
return tot_written;
}
static DEVICE_ATTR_RO(channel_vp_mapping);
/* Set up per device attributes in /sys/bus/vmbus/devices/<bus device> */
static struct attribute *vmbus_attrs[] = {
&dev_attr_id.attr,
@ -438,6 +502,7 @@ static struct attribute *vmbus_attrs[] = {
&dev_attr_in_write_index.attr,
&dev_attr_in_read_bytes_avail.attr,
&dev_attr_in_write_bytes_avail.attr,
&dev_attr_channel_vp_mapping.attr,
NULL,
};
ATTRIBUTE_GROUPS(vmbus);
@ -763,38 +828,6 @@ static void vmbus_isr(void)
}
}
#ifdef CONFIG_HOTPLUG_CPU
static int hyperv_cpu_disable(void)
{
return -ENOSYS;
}
static void hv_cpu_hotplug_quirk(bool vmbus_loaded)
{
static void *previous_cpu_disable;
/*
* Offlining a CPU when running on newer hypervisors (WS2012R2, Win8,
* ...) is not supported at this moment as channel interrupts are
* distributed across all of them.
*/
if ((vmbus_proto_version == VERSION_WS2008) ||
(vmbus_proto_version == VERSION_WIN7))
return;
if (vmbus_loaded) {
previous_cpu_disable = smp_ops.cpu_disable;
smp_ops.cpu_disable = hyperv_cpu_disable;
pr_notice("CPU offlining is not supported by hypervisor\n");
} else if (previous_cpu_disable)
smp_ops.cpu_disable = previous_cpu_disable;
}
#else
static void hv_cpu_hotplug_quirk(bool vmbus_loaded)
{
}
#endif
/*
* vmbus_bus_init -Main vmbus driver initialization routine.
@ -836,12 +869,14 @@ static int vmbus_bus_init(int irq)
if (ret)
goto err_alloc;
hv_cpu_hotplug_quirk(true);
if (vmbus_proto_version > VERSION_WIN7)
cpu_hotplug_disable();
/*
* Only register if the crash MSRs are available
*/
if (ms_hyperv.features & HV_FEATURE_GUEST_CRASH_MSR_AVAILABLE) {
if (ms_hyperv.misc_features & HV_FEATURE_GUEST_CRASH_MSR_AVAILABLE) {
register_die_notifier(&hyperv_die_block);
atomic_notifier_chain_register(&panic_notifier_list,
&hyperv_panic_block);
}
@ -863,8 +898,8 @@ err_cleanup:
}
/**
* __vmbus_child_driver_register - Register a vmbus's driver
* @drv: Pointer to driver structure you want to register
* __vmbus_child_driver_register() - Register a vmbus's driver
* @hv_driver: Pointer to driver structure you want to register
* @owner: owner module of the drv
* @mod_name: module name string
*
@ -896,7 +931,8 @@ EXPORT_SYMBOL_GPL(__vmbus_driver_register);
/**
* vmbus_driver_unregister() - Unregister a vmbus's driver
* @drv: Pointer to driver structure you want to un-register
* @hv_driver: Pointer to driver structure you want to
* un-register
*
* Un-register the given driver that was previous registered with a call to
* vmbus_driver_register()
@ -982,30 +1018,184 @@ void vmbus_device_unregister(struct hv_device *device_obj)
/*
* VMBUS is an acpi enumerated device. Get the the information we
* VMBUS is an acpi enumerated device. Get the information we
* need from DSDT.
*/
#define VTPM_BASE_ADDRESS 0xfed40000
static acpi_status vmbus_walk_resources(struct acpi_resource *res, void *ctx)
{
resource_size_t start = 0;
resource_size_t end = 0;
struct resource *new_res;
struct resource **old_res = &hyperv_mmio;
struct resource **prev_res = NULL;
switch (res->type) {
case ACPI_RESOURCE_TYPE_IRQ:
irq = res->data.irq.interrupts[0];
return AE_OK;
/*
* "Address" descriptors are for bus windows. Ignore
* "memory" descriptors, which are for registers on
* devices.
*/
case ACPI_RESOURCE_TYPE_ADDRESS32:
start = res->data.address32.address.minimum;
end = res->data.address32.address.maximum;
break;
case ACPI_RESOURCE_TYPE_ADDRESS64:
hyperv_mmio.start = res->data.address64.address.minimum;
hyperv_mmio.end = res->data.address64.address.maximum;
start = res->data.address64.address.minimum;
end = res->data.address64.address.maximum;
break;
default:
/* Unused resource type */
return AE_OK;
}
/*
* Ignore ranges that are below 1MB, as they're not
* necessary or useful here.
*/
if (end < 0x100000)
return AE_OK;
new_res = kzalloc(sizeof(*new_res), GFP_ATOMIC);
if (!new_res)
return AE_NO_MEMORY;
/* If this range overlaps the virtual TPM, truncate it. */
if (end > VTPM_BASE_ADDRESS && start < VTPM_BASE_ADDRESS)
end = VTPM_BASE_ADDRESS;
new_res->name = "hyperv mmio";
new_res->flags = IORESOURCE_MEM;
new_res->start = start;
new_res->end = end;
do {
if (!*old_res) {
*old_res = new_res;
break;
}
if ((*old_res)->end < new_res->start) {
new_res->sibling = *old_res;
if (prev_res)
(*prev_res)->sibling = new_res;
*old_res = new_res;
break;
}
prev_res = old_res;
old_res = &(*old_res)->sibling;
} while (1);
return AE_OK;
}
static int vmbus_acpi_remove(struct acpi_device *device)
{
struct resource *cur_res;
struct resource *next_res;
if (hyperv_mmio) {
for (cur_res = hyperv_mmio; cur_res; cur_res = next_res) {
next_res = cur_res->sibling;
kfree(cur_res);
}
}
return 0;
}
/**
* vmbus_allocate_mmio() - Pick a memory-mapped I/O range.
* @new: If successful, supplied a pointer to the
* allocated MMIO space.
* @device_obj: Identifies the caller
* @min: Minimum guest physical address of the
* allocation
* @max: Maximum guest physical address
* @size: Size of the range to be allocated
* @align: Alignment of the range to be allocated
* @fb_overlap_ok: Whether this allocation can be allowed
* to overlap the video frame buffer.
*
* This function walks the resources granted to VMBus by the
* _CRS object in the ACPI namespace underneath the parent
* "bridge" whether that's a root PCI bus in the Generation 1
* case or a Module Device in the Generation 2 case. It then
* attempts to allocate from the global MMIO pool in a way that
* matches the constraints supplied in these parameters and by
* that _CRS.
*
* Return: 0 on success, -errno on failure
*/
int vmbus_allocate_mmio(struct resource **new, struct hv_device *device_obj,
resource_size_t min, resource_size_t max,
resource_size_t size, resource_size_t align,
bool fb_overlap_ok)
{
struct resource *iter;
resource_size_t range_min, range_max, start, local_min, local_max;
const char *dev_n = dev_name(&device_obj->device);
u32 fb_end = screen_info.lfb_base + (screen_info.lfb_size << 1);
int i;
for (iter = hyperv_mmio; iter; iter = iter->sibling) {
if ((iter->start >= max) || (iter->end <= min))
continue;
range_min = iter->start;
range_max = iter->end;
/* If this range overlaps the frame buffer, split it into
two tries. */
for (i = 0; i < 2; i++) {
local_min = range_min;
local_max = range_max;
if (fb_overlap_ok || (range_min >= fb_end) ||
(range_max <= screen_info.lfb_base)) {
i++;
} else {
if ((range_min <= screen_info.lfb_base) &&
(range_max >= screen_info.lfb_base)) {
/*
* The frame buffer is in this window,
* so trim this into the part that
* preceeds the frame buffer.
*/
local_max = screen_info.lfb_base - 1;
range_min = fb_end;
} else {
range_min = fb_end;
continue;
}
}
start = (local_min + align - 1) & ~(align - 1);
for (; start + size - 1 <= local_max; start += align) {
*new = request_mem_region_exclusive(start, size,
dev_n);
if (*new)
return 0;
}
}
}
return -ENXIO;
}
EXPORT_SYMBOL_GPL(vmbus_allocate_mmio);
static int vmbus_acpi_add(struct acpi_device *device)
{
acpi_status result;
int ret_val = -ENODEV;
struct acpi_device *ancestor;
hv_acpi_dev = device;
@ -1015,35 +1205,27 @@ static int vmbus_acpi_add(struct acpi_device *device)
if (ACPI_FAILURE(result))
goto acpi_walk_err;
/*
* The parent of the vmbus acpi device (Gen2 firmware) is the VMOD that
* has the mmio ranges. Get that.
* Some ancestor of the vmbus acpi device (Gen1 or Gen2
* firmware) is the VMOD that has the mmio ranges. Get that.
*/
if (device->parent) {
result = acpi_walk_resources(device->parent->handle,
METHOD_NAME__CRS,
vmbus_walk_resources, NULL);
for (ancestor = device->parent; ancestor; ancestor = ancestor->parent) {
result = acpi_walk_resources(ancestor->handle, METHOD_NAME__CRS,
vmbus_walk_resources, NULL);
if (ACPI_FAILURE(result))
goto acpi_walk_err;
if (hyperv_mmio.start && hyperv_mmio.end)
request_resource(&iomem_resource, &hyperv_mmio);
continue;
if (hyperv_mmio)
break;
}
ret_val = 0;
acpi_walk_err:
complete(&probe_event);
if (ret_val)
vmbus_acpi_remove(device);
return ret_val;
}
static int vmbus_acpi_remove(struct acpi_device *device)
{
int ret = 0;
if (hyperv_mmio.start && hyperv_mmio.end)
ret = release_resource(&hyperv_mmio);
return ret;
}
static const struct acpi_device_id vmbus_acpi_device_ids[] = {
{"VMBUS", 0},
{"VMBus", 0},
@ -1060,6 +1242,29 @@ static struct acpi_driver vmbus_acpi_driver = {
},
};
static void hv_kexec_handler(void)
{
int cpu;
hv_synic_clockevents_cleanup();
vmbus_initiate_unload();
for_each_online_cpu(cpu)
smp_call_function_single(cpu, hv_synic_cleanup, NULL, 1);
hv_cleanup();
};
static void hv_crash_handler(struct pt_regs *regs)
{
vmbus_initiate_unload();
/*
* In crash handler we can't schedule synic cleanup for all CPUs,
* doing the cleanup for current CPU only. This should be sufficient
* for kdump.
*/
hv_synic_cleanup(NULL);
hv_cleanup();
};
static int __init hv_acpi_init(void)
{
int ret, t;
@ -1092,6 +1297,9 @@ static int __init hv_acpi_init(void)
if (ret)
goto cleanup;
hv_setup_kexec_handler(hv_kexec_handler);
hv_setup_crash_handler(hv_crash_handler);
return 0;
cleanup:
@ -1104,13 +1312,16 @@ static void __exit vmbus_exit(void)
{
int cpu;
hv_remove_kexec_handler();
hv_remove_crash_handler();
vmbus_connection.conn_state = DISCONNECTED;
hv_synic_clockevents_cleanup();
vmbus_disconnect();
hv_remove_vmbus_irq();
tasklet_kill(&msg_dpc);
vmbus_free_channels();
if (ms_hyperv.features & HV_FEATURE_GUEST_CRASH_MSR_AVAILABLE) {
if (ms_hyperv.misc_features & HV_FEATURE_GUEST_CRASH_MSR_AVAILABLE) {
unregister_die_notifier(&hyperv_die_block);
atomic_notifier_chain_unregister(&panic_notifier_list,
&hyperv_panic_block);
}
@ -1120,8 +1331,10 @@ static void __exit vmbus_exit(void)
tasklet_kill(hv_context.event_dpc[cpu]);
smp_call_function_single(cpu, hv_synic_cleanup, NULL, 1);
}
hv_synic_free();
acpi_bus_unregister_driver(&vmbus_acpi_driver);
hv_cpu_hotplug_quirk(false);
if (vmbus_proto_version > VERSION_WIN7)
cpu_hotplug_enable();
}

7
drivers/hwtracing/coresight/coresight-etm.h
View File

@ -183,7 +183,9 @@
* @seq_13_event: event causing the transition from 1 to 3.
* @seq_curr_state: current value of the sequencer register.
* @ctxid_idx: index for the context ID registers.
* @ctxid_val: value for the context ID to trigger on.
* @ctxid_pid: value for the context ID to trigger on.
* @ctxid_vpid: Virtual PID seen by users if PID namespace is enabled, otherwise
* the same value of ctxid_pid.
* @ctxid_mask: mask applicable to all the context IDs.
* @sync_freq: Synchronisation frequency.
* @timestamp_event: Defines an event that requests the insertion
@ -235,7 +237,8 @@ struct etm_drvdata {
u32 seq_13_event;
u32 seq_curr_state;
u8 ctxid_idx;
u32 ctxid_val[ETM_MAX_CTXID_CMP];
u32 ctxid_pid[ETM_MAX_CTXID_CMP];
u32 ctxid_vpid[ETM_MAX_CTXID_CMP];
u32 ctxid_mask;
u32 sync_freq;
u32 timestamp_event;

33
drivers/hwtracing/coresight/coresight-etm3x.c
View File

@ -237,8 +237,11 @@ static void etm_set_default(struct etm_drvdata *drvdata)
drvdata->seq_curr_state = 0x0;
drvdata->ctxid_idx = 0x0;
for (i = 0; i < drvdata->nr_ctxid_cmp; i++)
drvdata->ctxid_val[i] = 0x0;
for (i = 0; i < drvdata->nr_ctxid_cmp; i++) {
drvdata->ctxid_pid[i] = 0x0;
drvdata->ctxid_vpid[i] = 0x0;
}
drvdata->ctxid_mask = 0x0;
}
@ -289,7 +292,7 @@ static void etm_enable_hw(void *info)
for (i = 0; i < drvdata->nr_ext_out; i++)
etm_writel(drvdata, ETM_DEFAULT_EVENT_VAL, ETMEXTOUTEVRn(i));
for (i = 0; i < drvdata->nr_ctxid_cmp; i++)
etm_writel(drvdata, drvdata->ctxid_val[i], ETMCIDCVRn(i));
etm_writel(drvdata, drvdata->ctxid_pid[i], ETMCIDCVRn(i));
etm_writel(drvdata, drvdata->ctxid_mask, ETMCIDCMR);
etm_writel(drvdata, drvdata->sync_freq, ETMSYNCFR);
/* No external input selected */
@ -1386,38 +1389,41 @@ static ssize_t ctxid_idx_store(struct device *dev,
}
static DEVICE_ATTR_RW(ctxid_idx);
static ssize_t ctxid_val_show(struct device *dev,
static ssize_t ctxid_pid_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
unsigned long val;
struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
spin_lock(&drvdata->spinlock);
val = drvdata->ctxid_val[drvdata->ctxid_idx];
val = drvdata->ctxid_vpid[drvdata->ctxid_idx];
spin_unlock(&drvdata->spinlock);
return sprintf(buf, "%#lx\n", val);
}
static ssize_t ctxid_val_store(struct device *dev,
static ssize_t ctxid_pid_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t size)
{
int ret;
unsigned long val;
unsigned long vpid, pid;
struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
ret = kstrtoul(buf, 16, &val);
ret = kstrtoul(buf, 16, &vpid);
if (ret)
return ret;
pid = coresight_vpid_to_pid(vpid);
spin_lock(&drvdata->spinlock);
drvdata->ctxid_val[drvdata->ctxid_idx] = val;
drvdata->ctxid_pid[drvdata->ctxid_idx] = pid;
drvdata->ctxid_vpid[drvdata->ctxid_idx] = vpid;
spin_unlock(&drvdata->spinlock);
return size;
}
static DEVICE_ATTR_RW(ctxid_val);
static DEVICE_ATTR_RW(ctxid_pid);
static ssize_t ctxid_mask_show(struct device *dev,
struct device_attribute *attr, char *buf)
@ -1609,7 +1615,7 @@ static struct attribute *coresight_etm_attrs[] = {
&dev_attr_seq_13_event.attr,
&dev_attr_seq_curr_state.attr,
&dev_attr_ctxid_idx.attr,
&dev_attr_ctxid_val.attr,
&dev_attr_ctxid_pid.attr,
&dev_attr_ctxid_mask.attr,
&dev_attr_sync_freq.attr,
&dev_attr_timestamp_event.attr,
@ -1912,6 +1918,11 @@ static struct amba_id etm_ids[] = {
.mask = 0x0003ffff,
.data = "PTM 1.1",
},
{ /* PTM 1.1 Qualcomm */
.id = 0x0003006f,
.mask = 0x0003ffff,
.data = "PTM 1.1",
},
{ 0, 0},
};

37
drivers/hwtracing/coresight/coresight-etm4x.c
View File

@ -155,7 +155,7 @@ static void etm4_enable_hw(void *info)
drvdata->base + TRCACATRn(i));
}
for (i = 0; i < drvdata->numcidc; i++)
writeq_relaxed(drvdata->ctxid_val[i],
writeq_relaxed(drvdata->ctxid_pid[i],
drvdata->base + TRCCIDCVRn(i));
writel_relaxed(drvdata->ctxid_mask0, drvdata->base + TRCCIDCCTLR0);
writel_relaxed(drvdata->ctxid_mask1, drvdata->base + TRCCIDCCTLR1);
@ -506,8 +506,11 @@ static ssize_t reset_store(struct device *dev,
}
drvdata->ctxid_idx = 0x0;
for (i = 0; i < drvdata->numcidc; i++)
drvdata->ctxid_val[i] = 0x0;
for (i = 0; i < drvdata->numcidc; i++) {
drvdata->ctxid_pid[i] = 0x0;
drvdata->ctxid_vpid[i] = 0x0;
}
drvdata->ctxid_mask0 = 0x0;
drvdata->ctxid_mask1 = 0x0;
@ -1815,7 +1818,7 @@ static ssize_t ctxid_idx_store(struct device *dev,
}
static DEVICE_ATTR_RW(ctxid_idx);
static ssize_t ctxid_val_show(struct device *dev,
static ssize_t ctxid_pid_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
@ -1825,17 +1828,17 @@ static ssize_t ctxid_val_show(struct device *dev,
spin_lock(&drvdata->spinlock);
idx = drvdata->ctxid_idx;
val = (unsigned long)drvdata->ctxid_val[idx];
val = (unsigned long)drvdata->ctxid_vpid[idx];
spin_unlock(&drvdata->spinlock);
return scnprintf(buf, PAGE_SIZE, "%#lx\n", val);
}
static ssize_t ctxid_val_store(struct device *dev,
static ssize_t ctxid_pid_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t size)
{
u8 idx;
unsigned long val;
unsigned long vpid, pid;
struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent);
/*
@ -1845,16 +1848,19 @@ static ssize_t ctxid_val_store(struct device *dev,
*/
if (!drvdata->ctxid_size || !drvdata->numcidc)
return -EINVAL;
if (kstrtoul(buf, 16, &val))
if (kstrtoul(buf, 16, &vpid))
return -EINVAL;
pid = coresight_vpid_to_pid(vpid);
spin_lock(&drvdata->spinlock);
idx = drvdata->ctxid_idx;
drvdata->ctxid_val[idx] = (u64)val;
drvdata->ctxid_pid[idx] = (u64)pid;
drvdata->ctxid_vpid[idx] = (u64)vpid;
spin_unlock(&drvdata->spinlock);
return size;
}
static DEVICE_ATTR_RW(ctxid_val);
static DEVICE_ATTR_RW(ctxid_pid);
static ssize_t ctxid_masks_show(struct device *dev,
struct device_attribute *attr,
@ -1949,7 +1955,7 @@ static ssize_t ctxid_masks_store(struct device *dev,
*/
for (j = 0; j < 8; j++) {
if (maskbyte & 1)
drvdata->ctxid_val[i] &= ~(0xFF << (j * 8));
drvdata->ctxid_pid[i] &= ~(0xFF << (j * 8));
maskbyte >>= 1;
}
/* Select the next ctxid comparator mask value */
@ -2193,7 +2199,7 @@ static struct attribute *coresight_etmv4_attrs[] = {
&dev_attr_res_idx.attr,
&dev_attr_res_ctrl.attr,
&dev_attr_ctxid_idx.attr,
&dev_attr_ctxid_val.attr,
&dev_attr_ctxid_pid.attr,
&dev_attr_ctxid_masks.attr,
&dev_attr_vmid_idx.attr,
&dev_attr_vmid_val.attr,
@ -2513,8 +2519,11 @@ static void etm4_init_default_data(struct etmv4_drvdata *drvdata)
drvdata->addr_type[1] = ETM_ADDR_TYPE_RANGE;
}
for (i = 0; i < drvdata->numcidc; i++)
drvdata->ctxid_val[i] = 0x0;
for (i = 0; i < drvdata->numcidc; i++) {
drvdata->ctxid_pid[i] = 0x0;
drvdata->ctxid_vpid[i] = 0x0;
}
drvdata->ctxid_mask0 = 0x0;
drvdata->ctxid_mask1 = 0x0;

7
drivers/hwtracing/coresight/coresight-etm4x.h
View File

@ -265,7 +265,9 @@
* @addr_type: Current status of the comparator register.
* @ctxid_idx: Context ID index selector.
* @ctxid_size: Size of the context ID field to consider.
* @ctxid_val: Value of the context ID comparator.
* @ctxid_pid: Value of the context ID comparator.
* @ctxid_vpid: Virtual PID seen by users if PID namespace is enabled, otherwise
* the same value of ctxid_pid.
* @ctxid_mask0:Context ID comparator mask for comparator 0-3.
* @ctxid_mask1:Context ID comparator mask for comparator 4-7.
* @vmid_idx: VM ID index selector.
@ -352,7 +354,8 @@ struct etmv4_drvdata {
u8 addr_type[ETM_MAX_SINGLE_ADDR_CMP];
u8 ctxid_idx;
u8 ctxid_size;
u64 ctxid_val[ETMv4_MAX_CTXID_CMP];
u64 ctxid_pid[ETMv4_MAX_CTXID_CMP];
u64 ctxid_vpid[ETMv4_MAX_CTXID_CMP];
u32 ctxid_mask0;
u32 ctxid_mask1;
u8 vmid_idx;

13
drivers/hwtracing/coresight/coresight-replicator.c
View File

@ -12,7 +12,6 @@
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/device.h>
#include <linux/platform_device.h>
#include <linux/io.h>
@ -184,17 +183,7 @@ static struct platform_driver replicator_driver = {
},
};
static int __init replicator_init(void)
{
return platform_driver_register(&replicator_driver);
}
module_init(replicator_init);
static void __exit replicator_exit(void)
{
platform_driver_unregister(&replicator_driver);
}
module_exit(replicator_exit);
builtin_platform_driver(replicator_driver);
MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("CoreSight Replicator driver");

4
drivers/md/dm-ioctl.c
View File

@ -1919,9 +1919,7 @@ int __init dm_interface_init(void)
void dm_interface_exit(void)
{
if (misc_deregister(&_dm_misc) < 0)
DMERR("misc_deregister failed for control device");
misc_deregister(&_dm_misc);
dm_hash_exit();
}

10
drivers/misc/Kconfig
View File

@ -271,6 +271,16 @@ config HP_ILO
To compile this driver as a module, choose M here: the
module will be called hpilo.
config QCOM_COINCELL
tristate "Qualcomm coincell charger support"
depends on MFD_SPMI_PMIC || COMPILE_TEST
help
This driver supports the coincell block found inside of
Qualcomm PMICs. The coincell charger provides a means to
charge a coincell battery or backup capacitor which is used
to maintain PMIC register and RTC state in the absence of
external power.
config SGI_GRU
tristate "SGI GRU driver"
depends on X86_UV && SMP

1
drivers/misc/Makefile
View File

@ -18,6 +18,7 @@ obj-$(CONFIG_LKDTM) += lkdtm.o
obj-$(CONFIG_TIFM_CORE) += tifm_core.o
obj-$(CONFIG_TIFM_7XX1) += tifm_7xx1.o
obj-$(CONFIG_PHANTOM) += phantom.o
obj-$(CONFIG_QCOM_COINCELL) += qcom-coincell.o
obj-$(CONFIG_SENSORS_BH1780) += bh1780gli.o
obj-$(CONFIG_SENSORS_BH1770) += bh1770glc.o
obj-$(CONFIG_SENSORS_APDS990X) += apds990x.o

1
drivers/misc/ad525x_dpot-i2c.c
View File

@ -106,7 +106,6 @@ MODULE_DEVICE_TABLE(i2c, ad_dpot_id);
static struct i2c_driver ad_dpot_i2c_driver = {
.driver = {
.name = "ad_dpot",
.owner = THIS_MODULE,
},
.probe = ad_dpot_i2c_probe,
.remove = ad_dpot_i2c_remove,

1
drivers/misc/apds990x.c
View File

@ -1275,7 +1275,6 @@ static const struct dev_pm_ops apds990x_pm_ops = {
static struct i2c_driver apds990x_driver = {
.driver = {
.name = "apds990x",
.owner = THIS_MODULE,
.pm = &apds990x_pm_ops,
},
.probe = apds990x_probe,

1
drivers/misc/bh1770glc.c
View File

@ -1396,7 +1396,6 @@ static const struct dev_pm_ops bh1770_pm_ops = {
static struct i2c_driver bh1770_driver = {
.driver = {
.name = "bh1770glc",
.owner = THIS_MODULE,
.pm = &bh1770_pm_ops,
},
.probe = bh1770_probe,

1
drivers/misc/bmp085-i2c.c
View File

@ -66,7 +66,6 @@ MODULE_DEVICE_TABLE(i2c, bmp085_id);
static struct i2c_driver bmp085_i2c_driver = {
.driver = {
.owner = THIS_MODULE,
.name = BMP085_NAME,
},
.id_table = bmp085_id,

7
drivers/misc/cxl/sysfs.c
View File

@ -443,12 +443,7 @@ static ssize_t afu_read_config(struct file *filp, struct kobject *kobj,
struct afu_config_record *cr = to_cr(kobj);
struct cxl_afu *afu = to_cxl_afu(container_of(kobj->parent, struct device, kobj));
u64 i, j, val, size = afu->crs_len;
if (off > size)
return 0;
if (off + count > size)
count = size - off;
u64 i, j, val;
for (i = 0; i < count;) {
val = cxl_afu_cr_read64(afu, cr->cr, off & ~0x7);

12
drivers/misc/ds1682.c
View File

@ -148,12 +148,6 @@ static ssize_t ds1682_eeprom_read(struct file *filp, struct kobject *kobj,
dev_dbg(&client->dev, "ds1682_eeprom_read(p=%p, off=%lli, c=%zi)\n",
buf, off, count);
if (off >= DS1682_EEPROM_SIZE)
return 0;
if (off + count > DS1682_EEPROM_SIZE)
count = DS1682_EEPROM_SIZE - off;
rc = i2c_smbus_read_i2c_block_data(client, DS1682_REG_EEPROM + off,
count, buf);
if (rc < 0)
@ -171,12 +165,6 @@ static ssize_t ds1682_eeprom_write(struct file *filp, struct kobject *kobj,
dev_dbg(&client->dev, "ds1682_eeprom_write(p=%p, off=%lli, c=%zi)\n",
buf, off, count);
if (off >= DS1682_EEPROM_SIZE)
return -ENOSPC;
if (off + count > DS1682_EEPROM_SIZE)
count = DS1682_EEPROM_SIZE - off;
/* Write out to the device */
if (i2c_smbus_write_i2c_block_data(client, DS1682_REG_EEPROM + off,
count, buf) < 0)

13
drivers/misc/eeprom/Kconfig
View File

@ -96,17 +96,4 @@ config EEPROM_DIGSY_MTC_CFG
If unsure, say N.
config EEPROM_SUNXI_SID
tristate "Allwinner sunxi security ID support"
depends on ARCH_SUNXI && SYSFS
help
This is a driver for the 'security ID' available on various Allwinner
devices.
Due to the potential risks involved with changing e-fuses,
this driver is read-only.
This driver can also be built as a module. If so, the module
will be called sunxi_sid.
endmenu

1
drivers/misc/eeprom/Makefile
View File

@ -4,5 +4,4 @@ obj-$(CONFIG_EEPROM_LEGACY) += eeprom.o
obj-$(CONFIG_EEPROM_MAX6875) += max6875.o
obj-$(CONFIG_EEPROM_93CX6) += eeprom_93cx6.o
obj-$(CONFIG_EEPROM_93XX46) += eeprom_93xx46.o
obj-$(CONFIG_EEPROM_SUNXI_SID) += sunxi_sid.o
obj-$(CONFIG_EEPROM_DIGSY_MTC_CFG) += digsy_mtc_eeprom.o

1
drivers/misc/eeprom/at24.c
View File

@ -686,7 +686,6 @@ static int at24_remove(struct i2c_client *client)
static struct i2c_driver at24_driver = {
.driver = {
.name = "at24",
.owner = THIS_MODULE,
},
.probe = at24_probe,
.remove = at24_remove,

5
drivers/misc/eeprom/eeprom.c
View File

@ -88,11 +88,6 @@ static ssize_t eeprom_read(struct file *filp, struct kobject *kobj,
struct eeprom_data *data = i2c_get_clientdata(client);
u8 slice;
if (off > EEPROM_SIZE)
return 0;
if (off + count > EEPROM_SIZE)
count = EEPROM_SIZE - off;
/* Only refresh slices which contain requested bytes */
for (slice = off >> 5; slice <= (off + count - 1) >> 5; slice++)
eeprom_update_client(client, slice);

14
drivers/misc/eeprom/eeprom_93xx46.c
View File

@ -48,13 +48,6 @@ eeprom_93xx46_bin_read(struct file *filp, struct kobject *kobj,
dev = container_of(kobj, struct device, kobj);
edev = dev_get_drvdata(dev);
if (unlikely(off >= edev->bin.size))
return 0;
if ((off + count) > edev->bin.size)
count = edev->bin.size - off;
if (unlikely(!count))
return count;
cmd_addr = OP_READ << edev->addrlen;
if (edev->addrlen == 7) {
@ -200,13 +193,6 @@ eeprom_93xx46_bin_write(struct file *filp, struct kobject *kobj,
dev = container_of(kobj, struct device, kobj);
edev = dev_get_drvdata(dev);
if (unlikely(off >= edev->bin.size))
return -EFBIG;
if ((off + count) > edev->bin.size)
count = edev->bin.size - off;
if (unlikely(!count))
return count;
/* only write even number of bytes on 16-bit devices */
if (edev->addrlen == 6) {
step = 2;

6
drivers/misc/eeprom/max6875.c
View File

@ -114,12 +114,6 @@ static ssize_t max6875_read(struct file *filp, struct kobject *kobj,
struct max6875_data *data = i2c_get_clientdata(client);
int slice, max_slice;
if (off > USER_EEPROM_SIZE)
return 0;
if (off + count > USER_EEPROM_SIZE)
count = USER_EEPROM_SIZE - off;
/* refresh slices which contain requested bytes */
max_slice = (off + count - 1) >> SLICE_BITS;
for (slice = (off >> SLICE_BITS); slice <= max_slice; slice++)

156
drivers/misc/eeprom/sunxi_sid.c
View File

@ -1,156 +0,0 @@
/*
* Copyright (c) 2013 Oliver Schinagl <oliver@schinagl.nl>
* http://www.linux-sunxi.org
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* This driver exposes the Allwinner security ID, efuses exported in byte-
* sized chunks.
*/
#include <linux/compiler.h>
#include <linux/device.h>
#include <linux/err.h>
#include <linux/export.h>
#include <linux/fs.h>
#include <linux/io.h>
#include <linux/kernel.h>
#include <linux/kobject.h>
#include <linux/module.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
#include <linux/random.h>
#include <linux/slab.h>
#include <linux/stat.h>
#include <linux/sysfs.h>
#include <linux/types.h>
#define DRV_NAME "sunxi-sid"
struct sunxi_sid_data {
void __iomem *reg_base;
unsigned int keysize;
};
/* We read the entire key, due to a 32 bit read alignment requirement. Since we
* want to return the requested byte, this results in somewhat slower code and
* uses 4 times more reads as needed but keeps code simpler. Since the SID is
* only very rarely probed, this is not really an issue.
*/
static u8 sunxi_sid_read_byte(const struct sunxi_sid_data *sid_data,
const unsigned int offset)
{
u32 sid_key;
if (offset >= sid_data->keysize)
return 0;
sid_key = ioread32be(sid_data->reg_base + round_down(offset, 4));
sid_key >>= (offset % 4) * 8;
return sid_key; /* Only return the last byte */
}
static ssize_t sid_read(struct file *fd, struct kobject *kobj,
struct bin_attribute *attr, char *buf,
loff_t pos, size_t size)
{
struct platform_device *pdev;
struct sunxi_sid_data *sid_data;
int i;
pdev = to_platform_device(kobj_to_dev(kobj));
sid_data = platform_get_drvdata(pdev);
if (pos < 0 || pos >= sid_data->keysize)
return 0;
if (size > sid_data->keysize - pos)
size = sid_data->keysize - pos;
for (i = 0; i < size; i++)
buf[i] = sunxi_sid_read_byte(sid_data, pos + i);
return i;
}
static struct bin_attribute sid_bin_attr = {
.attr = { .name = "eeprom", .mode = S_IRUGO, },
.read = sid_read,
};
static int sunxi_sid_remove(struct platform_device *pdev)
{
device_remove_bin_file(&pdev->dev, &sid_bin_attr);
dev_dbg(&pdev->dev, "driver unloaded\n");
return 0;
}
static const struct of_device_id sunxi_sid_of_match[] = {
{ .compatible = "allwinner,sun4i-a10-sid", .data = (void *)16},
{ .compatible = "allwinner,sun7i-a20-sid", .data = (void *)512},
{/* sentinel */},
};
MODULE_DEVICE_TABLE(of, sunxi_sid_of_match);
static int sunxi_sid_probe(struct platform_device *pdev)
{
struct sunxi_sid_data *sid_data;
struct resource *res;
const struct of_device_id *of_dev_id;
u8 *entropy;
unsigned int i;
sid_data = devm_kzalloc(&pdev->dev, sizeof(struct sunxi_sid_data),
GFP_KERNEL);
if (!sid_data)
return -ENOMEM;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
sid_data->reg_base = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(sid_data->reg_base))
return PTR_ERR(sid_data->reg_base);
of_dev_id = of_match_device(sunxi_sid_of_match, &pdev->dev);
if (!of_dev_id)
return -ENODEV;
sid_data->keysize = (int)of_dev_id->data;
platform_set_drvdata(pdev, sid_data);
sid_bin_attr.size = sid_data->keysize;
if (device_create_bin_file(&pdev->dev, &sid_bin_attr))
return -ENODEV;
entropy = kzalloc(sizeof(u8) * sid_data->keysize, GFP_KERNEL);
for (i = 0; i < sid_data->keysize; i++)
entropy[i] = sunxi_sid_read_byte(sid_data, i);
add_device_randomness(entropy, sid_data->keysize);
kfree(entropy);
dev_dbg(&pdev->dev, "loaded\n");
return 0;
}
static struct platform_driver sunxi_sid_driver = {
.probe = sunxi_sid_probe,
.remove = sunxi_sid_remove,
.driver = {
.name = DRV_NAME,
.of_match_table = sunxi_sid_of_match,
},
};
module_platform_driver(sunxi_sid_driver);
MODULE_AUTHOR("Oliver Schinagl <oliver@schinagl.nl>");
MODULE_DESCRIPTION("Allwinner sunxi security id driver");
MODULE_LICENSE("GPL");

1
drivers/misc/isl29003.c
View File

@ -465,7 +465,6 @@ MODULE_DEVICE_TABLE(i2c, isl29003_id);
static struct i2c_driver isl29003_driver = {
.driver = {
.name = ISL29003_DRV_NAME,
.owner = THIS_MODULE,
.pm = ISL29003_PM_OPS,
},
.probe = isl29003_probe,

1
drivers/misc/lis3lv02d/lis3lv02d_i2c.c
View File

@ -274,7 +274,6 @@ static const struct dev_pm_ops lis3_pm_ops = {
static struct i2c_driver lis3lv02d_i2c_driver = {
.driver = {
.name = DRV_NAME,
.owner = THIS_MODULE,
.pm = &lis3_pm_ops,
.of_match_table = of_match_ptr(lis3lv02d_i2c_dt_ids),
},

2
drivers/misc/mei/Makefile
View File

@ -11,7 +11,7 @@ mei-objs += main.o
mei-objs += amthif.o
mei-objs += wd.o
mei-objs += bus.o
mei-objs += nfc.o
mei-objs += bus-fixup.o
mei-$(CONFIG_DEBUG_FS) += debugfs.o
obj-$(CONFIG_INTEL_MEI_ME) += mei-me.o

306
drivers/misc/mei/bus-fixup.c Normal file
View File

@ -0,0 +1,306 @@
/*
*
* Intel Management Engine Interface (Intel MEI) Linux driver
* Copyright (c) 2003-2013, Intel Corporation.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
*/
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/device.h>
#include <linux/slab.h>
#include <linux/uuid.h>
#include <linux/mei_cl_bus.h>
#include "mei_dev.h"
#include "client.h"
#define MEI_UUID_NFC_INFO UUID_LE(0xd2de1625, 0x382d, 0x417d, \
0x48, 0xa4, 0xef, 0xab, 0xba, 0x8a, 0x12, 0x06)
static const uuid_le mei_nfc_info_guid = MEI_UUID_NFC_INFO;
#define MEI_UUID_NFC_HCI UUID_LE(0x0bb17a78, 0x2a8e, 0x4c50, \
0x94, 0xd4, 0x50, 0x26, 0x67, 0x23, 0x77, 0x5c)
#define MEI_UUID_ANY NULL_UUID_LE
/**
* number_of_connections - determine whether an client be on the bus
* according number of connections
* We support only clients:
* 1. with single connection
* 2. and fixed clients (max_number_of_connections == 0)
*
* @cldev: me clients device
*/
static void number_of_connections(struct mei_cl_device *cldev)
{
dev_dbg(&cldev->dev, "running hook %s on %pUl\n",
__func__, mei_me_cl_uuid(cldev->me_cl));
if (cldev->me_cl->props.max_number_of_connections > 1)
cldev->do_match = 0;
}
/**
* blacklist - blacklist a client from the bus
*
* @cldev: me clients device
*/
static void blacklist(struct mei_cl_device *cldev)
{
dev_dbg(&cldev->dev, "running hook %s on %pUl\n",
__func__, mei_me_cl_uuid(cldev->me_cl));
cldev->do_match = 0;
}
struct mei_nfc_cmd {
u8 command;
u8 status;
u16 req_id;
u32 reserved;
u16 data_size;
u8 sub_command;
u8 data[];
} __packed;
struct mei_nfc_reply {
u8 command;
u8 status;
u16 req_id;
u32 reserved;
u16 data_size;
u8 sub_command;
u8 reply_status;
u8 data[];
} __packed;
struct mei_nfc_if_version {
u8 radio_version_sw[3];
u8 reserved[3];
u8 radio_version_hw[3];
u8 i2c_addr;
u8 fw_ivn;
u8 vendor_id;
u8 radio_type;
} __packed;
#define MEI_NFC_CMD_MAINTENANCE 0x00
#define MEI_NFC_SUBCMD_IF_VERSION 0x01
/* Vendors */
#define MEI_NFC_VENDOR_INSIDE 0x00
#define MEI_NFC_VENDOR_NXP 0x01
/* Radio types */
#define MEI_NFC_VENDOR_INSIDE_UREAD 0x00
#define MEI_NFC_VENDOR_NXP_PN544 0x01
/**
* mei_nfc_if_version - get NFC interface version
*
* @cl: host client (nfc info)
* @ver: NFC interface version to be filled in
*
* Return: 0 on success; < 0 otherwise
*/
static int mei_nfc_if_version(struct mei_cl *cl,
struct mei_nfc_if_version *ver)
{
struct mei_device *bus;
struct mei_nfc_cmd cmd = {
.command = MEI_NFC_CMD_MAINTENANCE,
.data_size = 1,
.sub_command = MEI_NFC_SUBCMD_IF_VERSION,
};
struct mei_nfc_reply *reply = NULL;
size_t if_version_length;
int bytes_recv, ret;
bus = cl->dev;
WARN_ON(mutex_is_locked(&bus->device_lock));
ret = __mei_cl_send(cl, (u8 *)&cmd, sizeof(struct mei_nfc_cmd), 1);
if (ret < 0) {
dev_err(bus->dev, "Could not send IF version cmd\n");
return ret;
}
/* to be sure on the stack we alloc memory */
if_version_length = sizeof(struct mei_nfc_reply) +
sizeof(struct mei_nfc_if_version);
reply = kzalloc(if_version_length, GFP_KERNEL);
if (!reply)
return -ENOMEM;
ret = 0;
bytes_recv = __mei_cl_recv(cl, (u8 *)reply, if_version_length);
if (bytes_recv < 0 || bytes_recv < sizeof(struct mei_nfc_reply)) {
dev_err(bus->dev, "Could not read IF version\n");
ret = -EIO;
goto err;
}
memcpy(ver, reply->data, sizeof(struct mei_nfc_if_version));
dev_info(bus->dev, "NFC MEI VERSION: IVN 0x%x Vendor ID 0x%x Type 0x%x\n",
ver->fw_ivn, ver->vendor_id, ver->radio_type);
err:
kfree(reply);
return ret;
}
/**
* mei_nfc_radio_name - derive nfc radio name from the interface version
*
* @ver: NFC radio version
*
* Return: radio name string
*/
static const char *mei_nfc_radio_name(struct mei_nfc_if_version *ver)
{
if (ver->vendor_id == MEI_NFC_VENDOR_INSIDE) {
if (ver->radio_type == MEI_NFC_VENDOR_INSIDE_UREAD)
return "microread";
}
if (ver->vendor_id == MEI_NFC_VENDOR_NXP) {
if (ver->radio_type == MEI_NFC_VENDOR_NXP_PN544)
return "pn544";
}
return NULL;
}
/**
* mei_nfc - The nfc fixup function. The function retrieves nfc radio
* name and set is as device attribute so we can load
* the proper device driver for it
*
* @cldev: me client device (nfc)
*/
static void mei_nfc(struct mei_cl_device *cldev)
{
struct mei_device *bus;
struct mei_cl *cl;
struct mei_me_client *me_cl = NULL;
struct mei_nfc_if_version ver;
const char *radio_name = NULL;
int ret;
bus = cldev->bus;
dev_dbg(bus->dev, "running hook %s: %pUl match=%d\n",
__func__, mei_me_cl_uuid(cldev->me_cl), cldev->do_match);
mutex_lock(&bus->device_lock);
/* we need to connect to INFO GUID */
cl = mei_cl_alloc_linked(bus, MEI_HOST_CLIENT_ID_ANY);
if (IS_ERR(cl)) {
ret = PTR_ERR(cl);
cl = NULL;
dev_err(bus->dev, "nfc hook alloc failed %d\n", ret);
goto out;
}
me_cl = mei_me_cl_by_uuid(bus, &mei_nfc_info_guid);
if (!me_cl) {
ret = -ENOTTY;
dev_err(bus->dev, "Cannot find nfc info %d\n", ret);
goto out;
}
ret = mei_cl_connect(cl, me_cl, NULL);
if (ret < 0) {
dev_err(&cldev->dev, "Can't connect to the NFC INFO ME ret = %d\n",
ret);
goto out;
}
mutex_unlock(&bus->device_lock);
ret = mei_nfc_if_version(cl, &ver);
if (ret)
goto disconnect;
radio_name = mei_nfc_radio_name(&ver);
if (!radio_name) {
ret = -ENOENT;
dev_err(&cldev->dev, "Can't get the NFC interface version ret = %d\n",
ret);
goto disconnect;
}
dev_dbg(bus->dev, "nfc radio %s\n", radio_name);
strlcpy(cldev->name, radio_name, sizeof(cldev->name));
disconnect:
mutex_lock(&bus->device_lock);
if (mei_cl_disconnect(cl) < 0)
dev_err(bus->dev, "Can't disconnect the NFC INFO ME\n");
mei_cl_flush_queues(cl, NULL);
out:
mei_cl_unlink(cl);
mutex_unlock(&bus->device_lock);
mei_me_cl_put(me_cl);
kfree(cl);
if (ret)
cldev->do_match = 0;
dev_dbg(bus->dev, "end of fixup match = %d\n", cldev->do_match);
}
#define MEI_FIXUP(_uuid, _hook) { _uuid, _hook }
static struct mei_fixup {
const uuid_le uuid;
void (*hook)(struct mei_cl_device *cldev);
} mei_fixups[] = {
MEI_FIXUP(MEI_UUID_ANY, number_of_connections),
MEI_FIXUP(MEI_UUID_NFC_INFO, blacklist),
MEI_FIXUP(MEI_UUID_NFC_HCI, mei_nfc),
};
/**
* mei_cl_dev_fixup - run fixup handlers
*
* @cldev: me client device
*/
void mei_cl_dev_fixup(struct mei_cl_device *cldev)
{
struct mei_fixup *f;
const uuid_le *uuid = mei_me_cl_uuid(cldev->me_cl);
int i;
for (i = 0; i < ARRAY_SIZE(mei_fixups); i++) {
f = &mei_fixups[i];
if (uuid_le_cmp(f->uuid, MEI_UUID_ANY) == 0 ||
uuid_le_cmp(f->uuid, *uuid) == 0)
f->hook(cldev);
}
}

1010
drivers/misc/mei/bus.c
View File

File diff suppressed because it is too large Load Diff

333
drivers/misc/mei/client.c
View File

@ -555,10 +555,10 @@ void mei_cl_init(struct mei_cl *cl, struct mei_device *dev)
init_waitqueue_head(&cl->wait);
init_waitqueue_head(&cl->rx_wait);
init_waitqueue_head(&cl->tx_wait);
init_waitqueue_head(&cl->ev_wait);
INIT_LIST_HEAD(&cl->rd_completed);
INIT_LIST_HEAD(&cl->rd_pending);
INIT_LIST_HEAD(&cl->link);
INIT_LIST_HEAD(&cl->device_link);
cl->writing_state = MEI_IDLE;
cl->state = MEI_FILE_INITIALIZING;
cl->dev = dev;
@ -690,16 +690,12 @@ void mei_host_client_init(struct work_struct *work)
mei_wd_host_init(dev, me_cl);
mei_me_cl_put(me_cl);
me_cl = mei_me_cl_by_uuid(dev, &mei_nfc_guid);
if (me_cl)
mei_nfc_host_init(dev, me_cl);
mei_me_cl_put(me_cl);
dev->dev_state = MEI_DEV_ENABLED;
dev->reset_count = 0;
mutex_unlock(&dev->device_lock);
mei_cl_bus_rescan(dev);
pm_runtime_mark_last_busy(dev->dev);
dev_dbg(dev->dev, "rpm: autosuspend\n");
pm_runtime_autosuspend(dev->dev);
@ -841,45 +837,22 @@ int mei_cl_irq_disconnect(struct mei_cl *cl, struct mei_cl_cb *cb,
return ret;
}
/**
* mei_cl_disconnect - disconnect host client from the me one
* __mei_cl_disconnect - disconnect host client from the me one
* internal function runtime pm has to be already acquired
*
* @cl: host client
*
* Locking: called under "dev->device_lock" lock
*
* Return: 0 on success, <0 on failure.
*/
int mei_cl_disconnect(struct mei_cl *cl)
static int __mei_cl_disconnect(struct mei_cl *cl)
{
struct mei_device *dev;
struct mei_cl_cb *cb;
int rets;
if (WARN_ON(!cl || !cl->dev))
return -ENODEV;
dev = cl->dev;
cl_dbg(dev, cl, "disconnecting");
if (!mei_cl_is_connected(cl))
return 0;
if (mei_cl_is_fixed_address(cl)) {
mei_cl_set_disconnected(cl);
return 0;
}
rets = pm_runtime_get(dev->dev);
if (rets < 0 && rets != -EINPROGRESS) {
pm_runtime_put_noidle(dev->dev);
cl_err(dev, cl, "rpm: get failed %d\n", rets);
return rets;
}
cl->state = MEI_FILE_DISCONNECTING;
cb = mei_io_cb_init(cl, MEI_FOP_DISCONNECT, NULL);
@ -915,11 +888,52 @@ out:
if (!rets)
cl_dbg(dev, cl, "successfully disconnected from FW client.\n");
mei_io_cb_free(cb);
return rets;
}
/**
* mei_cl_disconnect - disconnect host client from the me one
*
* @cl: host client
*
* Locking: called under "dev->device_lock" lock
*
* Return: 0 on success, <0 on failure.
*/
int mei_cl_disconnect(struct mei_cl *cl)
{
struct mei_device *dev;
int rets;
if (WARN_ON(!cl || !cl->dev))
return -ENODEV;
dev = cl->dev;
cl_dbg(dev, cl, "disconnecting");
if (!mei_cl_is_connected(cl))
return 0;
if (mei_cl_is_fixed_address(cl)) {
mei_cl_set_disconnected(cl);
return 0;
}
rets = pm_runtime_get(dev->dev);
if (rets < 0 && rets != -EINPROGRESS) {
pm_runtime_put_noidle(dev->dev);
cl_err(dev, cl, "rpm: get failed %d\n", rets);
return rets;
}
rets = __mei_cl_disconnect(cl);
cl_dbg(dev, cl, "rpm: autosuspend\n");
pm_runtime_mark_last_busy(dev->dev);
pm_runtime_put_autosuspend(dev->dev);
mei_io_cb_free(cb);
return rets;
}
@ -1064,11 +1078,23 @@ int mei_cl_connect(struct mei_cl *cl, struct mei_me_client *me_cl,
mutex_unlock(&dev->device_lock);
wait_event_timeout(cl->wait,
(cl->state == MEI_FILE_CONNECTED ||
cl->state == MEI_FILE_DISCONNECT_REQUIRED ||
cl->state == MEI_FILE_DISCONNECT_REPLY),
mei_secs_to_jiffies(MEI_CL_CONNECT_TIMEOUT));
mutex_lock(&dev->device_lock);
if (!mei_cl_is_connected(cl)) {
if (cl->state == MEI_FILE_DISCONNECT_REQUIRED) {
mei_io_list_flush(&dev->ctrl_rd_list, cl);
mei_io_list_flush(&dev->ctrl_wr_list, cl);
/* ignore disconnect return valuue;
* in case of failure reset will be invoked
*/
__mei_cl_disconnect(cl);
rets = -EFAULT;
goto out;
}
/* timeout or something went really wrong */
if (!cl->status)
cl->status = -EFAULT;
@ -1180,6 +1206,221 @@ int mei_cl_flow_ctrl_reduce(struct mei_cl *cl)
return 0;
}
/**
* mei_cl_notify_fop2req - convert fop to proper request
*
* @fop: client notification start response command
*
* Return: MEI_HBM_NOTIFICATION_START/STOP
*/
u8 mei_cl_notify_fop2req(enum mei_cb_file_ops fop)
{
if (fop == MEI_FOP_NOTIFY_START)
return MEI_HBM_NOTIFICATION_START;
else
return MEI_HBM_NOTIFICATION_STOP;
}
/**
* mei_cl_notify_req2fop - convert notification request top file operation type
*
* @req: hbm notification request type
*
* Return: MEI_FOP_NOTIFY_START/STOP
*/
enum mei_cb_file_ops mei_cl_notify_req2fop(u8 req)
{
if (req == MEI_HBM_NOTIFICATION_START)
return MEI_FOP_NOTIFY_START;
else
return MEI_FOP_NOTIFY_STOP;
}
/**
* mei_cl_irq_notify - send notification request in irq_thread context
*
* @cl: client
* @cb: callback block.
* @cmpl_list: complete list.
*
* Return: 0 on such and error otherwise.
*/
int mei_cl_irq_notify(struct mei_cl *cl, struct mei_cl_cb *cb,
struct mei_cl_cb *cmpl_list)
{
struct mei_device *dev = cl->dev;
u32 msg_slots;
int slots;
int ret;
bool request;
msg_slots = mei_data2slots(sizeof(struct hbm_client_connect_request));
slots = mei_hbuf_empty_slots(dev);
if (slots < msg_slots)
return -EMSGSIZE;
request = mei_cl_notify_fop2req(cb->fop_type);
ret = mei_hbm_cl_notify_req(dev, cl, request);
if (ret) {
cl->status = ret;
list_move_tail(&cb->list, &cmpl_list->list);
return ret;
}
list_move_tail(&cb->list, &dev->ctrl_rd_list.list);
return 0;
}
/**
* mei_cl_notify_request - send notification stop/start request
*
* @cl: host client
* @file: associate request with file
* @request: 1 for start or 0 for stop
*
* Locking: called under "dev->device_lock" lock
*
* Return: 0 on such and error otherwise.
*/
int mei_cl_notify_request(struct mei_cl *cl, struct file *file, u8 request)
{
struct mei_device *dev;
struct mei_cl_cb *cb;
enum mei_cb_file_ops fop_type;
int rets;
if (WARN_ON(!cl || !cl->dev))
return -ENODEV;
dev = cl->dev;
if (!dev->hbm_f_ev_supported) {
cl_dbg(dev, cl, "notifications not supported\n");
return -EOPNOTSUPP;
}
rets = pm_runtime_get(dev->dev);
if (rets < 0 && rets != -EINPROGRESS) {
pm_runtime_put_noidle(dev->dev);
cl_err(dev, cl, "rpm: get failed %d\n", rets);
return rets;
}
fop_type = mei_cl_notify_req2fop(request);
cb = mei_io_cb_init(cl, fop_type, file);
if (!cb) {
rets = -ENOMEM;
goto out;
}
if (mei_hbuf_acquire(dev)) {
if (mei_hbm_cl_notify_req(dev, cl, request)) {
rets = -ENODEV;
goto out;
}
list_add_tail(&cb->list, &dev->ctrl_rd_list.list);
} else {
list_add_tail(&cb->list, &dev->ctrl_wr_list.list);
}
mutex_unlock(&dev->device_lock);
wait_event_timeout(cl->wait, cl->notify_en == request,
mei_secs_to_jiffies(MEI_CL_CONNECT_TIMEOUT));
mutex_lock(&dev->device_lock);
if (cl->notify_en != request) {
mei_io_list_flush(&dev->ctrl_rd_list, cl);
mei_io_list_flush(&dev->ctrl_wr_list, cl);
if (!cl->status)
cl->status = -EFAULT;
}
rets = cl->status;
out:
cl_dbg(dev, cl, "rpm: autosuspend\n");
pm_runtime_mark_last_busy(dev->dev);
pm_runtime_put_autosuspend(dev->dev);
mei_io_cb_free(cb);
return rets;
}
/**
* mei_cl_notify - raise notification
*
* @cl: host client
*
* Locking: called under "dev->device_lock" lock
*/
void mei_cl_notify(struct mei_cl *cl)
{
struct mei_device *dev;
if (!cl || !cl->dev)
return;
dev = cl->dev;
if (!cl->notify_en)
return;
cl_dbg(dev, cl, "notify event");
cl->notify_ev = true;
wake_up_interruptible_all(&cl->ev_wait);
if (cl->ev_async)
kill_fasync(&cl->ev_async, SIGIO, POLL_PRI);
mei_cl_bus_notify_event(cl);
}
/**
* mei_cl_notify_get - get or wait for notification event
*
* @cl: host client
* @block: this request is blocking
* @notify_ev: true if notification event was received
*
* Locking: called under "dev->device_lock" lock
*
* Return: 0 on such and error otherwise.
*/
int mei_cl_notify_get(struct mei_cl *cl, bool block, bool *notify_ev)
{
struct mei_device *dev;
int rets;
*notify_ev = false;
if (WARN_ON(!cl || !cl->dev))
return -ENODEV;
dev = cl->dev;
if (!mei_cl_is_connected(cl))
return -ENODEV;
if (cl->notify_ev)
goto out;
if (!block)
return -EAGAIN;
mutex_unlock(&dev->device_lock);
rets = wait_event_interruptible(cl->ev_wait, cl->notify_ev);
mutex_lock(&dev->device_lock);
if (rets < 0)
return rets;
out:
*notify_ev = cl->notify_ev;
cl->notify_ev = false;
return 0;
}
/**
* mei_cl_read_start - the start read client message function.
*
@ -1356,6 +1597,7 @@ int mei_cl_write(struct mei_cl *cl, struct mei_cl_cb *cb, bool blocking)
struct mei_device *dev;
struct mei_msg_data *buf;
struct mei_msg_hdr mei_hdr;
int size;
int rets;
@ -1367,10 +1609,10 @@ int mei_cl_write(struct mei_cl *cl, struct mei_cl_cb *cb, bool blocking)
dev = cl->dev;
buf = &cb->buf;
size = buf->size;
cl_dbg(dev, cl, "size=%d\n", buf->size);
cl_dbg(dev, cl, "size=%d\n", size);
rets = pm_runtime_get(dev->dev);
if (rets < 0 && rets != -EINPROGRESS) {
@ -1394,21 +1636,21 @@ int mei_cl_write(struct mei_cl *cl, struct mei_cl_cb *cb, bool blocking)
if (rets == 0) {
cl_dbg(dev, cl, "No flow control credentials: not sending.\n");
rets = buf->size;
rets = size;
goto out;
}
if (!mei_hbuf_acquire(dev)) {
cl_dbg(dev, cl, "Cannot acquire the host buffer: not sending.\n");
rets = buf->size;
rets = size;
goto out;
}
/* Check for a maximum length */
if (buf->size > mei_hbuf_max_len(dev)) {
if (size > mei_hbuf_max_len(dev)) {
mei_hdr.length = mei_hbuf_max_len(dev);
mei_hdr.msg_complete = 0;
} else {
mei_hdr.length = buf->size;
mei_hdr.length = size;
mei_hdr.msg_complete = 1;
}
@ -1430,6 +1672,7 @@ out:
else
list_add_tail(&cb->list, &dev->write_list.list);
cb = NULL;
if (blocking && cl->writing_state != MEI_WRITE_COMPLETE) {
mutex_unlock(&dev->device_lock);
@ -1444,7 +1687,7 @@ out:
}
}
rets = buf->size;
rets = size;
err:
cl_dbg(dev, cl, "rpm: autosuspend\n");
pm_runtime_mark_last_busy(dev->dev);
@ -1486,6 +1729,8 @@ void mei_cl_complete(struct mei_cl *cl, struct mei_cl_cb *cb)
case MEI_FOP_CONNECT:
case MEI_FOP_DISCONNECT:
case MEI_FOP_NOTIFY_STOP:
case MEI_FOP_NOTIFY_START:
if (waitqueue_active(&cl->wait))
wake_up(&cl->wait);
@ -1528,6 +1773,12 @@ void mei_cl_all_wakeup(struct mei_device *dev)
cl_dbg(dev, cl, "Waking up writing client!\n");
wake_up_interruptible(&cl->tx_wait);
}
/* synchronized under device mutex */
if (waitqueue_active(&cl->ev_wait)) {
cl_dbg(dev, cl, "Waking up waiting for event clients!\n");
wake_up_interruptible(&cl->ev_wait);
}
}
}

8
drivers/misc/mei/client.h
View File

@ -219,6 +219,14 @@ void mei_cl_complete(struct mei_cl *cl, struct mei_cl_cb *cb);
void mei_host_client_init(struct work_struct *work);
u8 mei_cl_notify_fop2req(enum mei_cb_file_ops fop);
enum mei_cb_file_ops mei_cl_notify_req2fop(u8 request);
int mei_cl_notify_request(struct mei_cl *cl, struct file *file, u8 request);
int mei_cl_irq_notify(struct mei_cl *cl, struct mei_cl_cb *cb,
struct mei_cl_cb *cmpl_list);
int mei_cl_notify_get(struct mei_cl *cl, bool block, bool *notify_ev);
void mei_cl_notify(struct mei_cl *cl);
void mei_cl_all_disconnect(struct mei_device *dev);
void mei_cl_all_wakeup(struct mei_device *dev);
void mei_cl_all_write_clear(struct mei_device *dev);

6
drivers/misc/mei/debugfs.c
View File

@ -154,6 +154,12 @@ static ssize_t mei_dbgfs_read_devstate(struct file *fp, char __user *ubuf,
pos += scnprintf(buf + pos, bufsz - pos, "hbm features:\n");
pos += scnprintf(buf + pos, bufsz - pos, "\tPG: %01d\n",
dev->hbm_f_pg_supported);
pos += scnprintf(buf + pos, bufsz - pos, "\tDC: %01d\n",
dev->hbm_f_dc_supported);
pos += scnprintf(buf + pos, bufsz - pos, "\tDOT: %01d\n",
dev->hbm_f_dot_supported);
pos += scnprintf(buf + pos, bufsz - pos, "\tEV: %01d\n",
dev->hbm_f_ev_supported);
}
pos += scnprintf(buf + pos, bufsz - pos, "pg: %s, %s\n",

330
drivers/misc/mei/hbm.c
View File

@ -52,6 +52,7 @@ static const char *mei_cl_conn_status_str(enum mei_cl_connect_status status)
MEI_CL_CS(ALREADY_STARTED);
MEI_CL_CS(OUT_OF_RESOURCES);
MEI_CL_CS(MESSAGE_SMALL);
MEI_CL_CS(NOT_ALLOWED);
default: return "unknown";
}
#undef MEI_CL_CCS
@ -89,6 +90,7 @@ static int mei_cl_conn_status_to_errno(enum mei_cl_connect_status status)
case MEI_CL_CONN_ALREADY_STARTED: return -EBUSY;
case MEI_CL_CONN_OUT_OF_RESOURCES: return -EBUSY;
case MEI_CL_CONN_MESSAGE_SMALL: return -EINVAL;
case MEI_CL_CONN_NOT_ALLOWED: return -EBUSY;
default: return -EINVAL;
}
}
@ -299,6 +301,7 @@ static int mei_hbm_enum_clients_req(struct mei_device *dev)
enum_req = (struct hbm_host_enum_request *)dev->wr_msg.data;
memset(enum_req, 0, len);
enum_req->hbm_cmd = HOST_ENUM_REQ_CMD;
enum_req->allow_add = dev->hbm_f_dc_supported;
ret = mei_write_message(dev, mei_hdr, dev->wr_msg.data);
if (ret) {
@ -343,6 +346,180 @@ static int mei_hbm_me_cl_add(struct mei_device *dev,
return 0;
}
/**
* mei_hbm_add_cl_resp - send response to fw on client add request
*
* @dev: the device structure
* @addr: me address
* @status: response status
*
* Return: 0 on success and < 0 on failure
*/
static int mei_hbm_add_cl_resp(struct mei_device *dev, u8 addr, u8 status)
{
struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr;
struct hbm_add_client_response *resp;
const size_t len = sizeof(struct hbm_add_client_response);
int ret;
dev_dbg(dev->dev, "adding client response\n");
resp = (struct hbm_add_client_response *)dev->wr_msg.data;
mei_hbm_hdr(mei_hdr, len);
memset(resp, 0, sizeof(struct hbm_add_client_response));
resp->hbm_cmd = MEI_HBM_ADD_CLIENT_RES_CMD;
resp->me_addr = addr;
resp->status = status;
ret = mei_write_message(dev, mei_hdr, dev->wr_msg.data);
if (ret)
dev_err(dev->dev, "add client response write failed: ret = %d\n",
ret);
return ret;
}
/**
* mei_hbm_fw_add_cl_req - request from the fw to add a client
*
* @dev: the device structure
* @req: add client request
*
* Return: 0 on success and < 0 on failure
*/
static int mei_hbm_fw_add_cl_req(struct mei_device *dev,
struct hbm_add_client_request *req)
{
int ret;
u8 status = MEI_HBMS_SUCCESS;
BUILD_BUG_ON(sizeof(struct hbm_add_client_request) !=
sizeof(struct hbm_props_response));
ret = mei_hbm_me_cl_add(dev, (struct hbm_props_response *)req);
if (ret)
status = !MEI_HBMS_SUCCESS;
return mei_hbm_add_cl_resp(dev, req->me_addr, status);
}
/**
* mei_hbm_cl_notify_req - send notification request
*
* @dev: the device structure
* @cl: a client to disconnect from
* @start: true for start false for stop
*
* Return: 0 on success and -EIO on write failure
*/
int mei_hbm_cl_notify_req(struct mei_device *dev,
struct mei_cl *cl, u8 start)
{
struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr;
struct hbm_notification_request *req;
const size_t len = sizeof(struct hbm_notification_request);
int ret;
mei_hbm_hdr(mei_hdr, len);
mei_hbm_cl_hdr(cl, MEI_HBM_NOTIFY_REQ_CMD, dev->wr_msg.data, len);
req = (struct hbm_notification_request *)dev->wr_msg.data;
req->start = start;
ret = mei_write_message(dev, mei_hdr, dev->wr_msg.data);
if (ret)
dev_err(dev->dev, "notify request failed: ret = %d\n", ret);
return ret;
}
/**
* notify_res_to_fop - convert notification response to the proper
* notification FOP
*
* @cmd: client notification start response command
*
* Return: MEI_FOP_NOTIFY_START or MEI_FOP_NOTIFY_STOP;
*/
static inline enum mei_cb_file_ops notify_res_to_fop(struct mei_hbm_cl_cmd *cmd)
{
struct hbm_notification_response *rs =
(struct hbm_notification_response *)cmd;
return mei_cl_notify_req2fop(rs->start);
}
/**
* mei_hbm_cl_notify_start_res - update the client state according
* notify start response
*
* @dev: the device structure
* @cl: mei host client
* @cmd: client notification start response command
*/
static void mei_hbm_cl_notify_start_res(struct mei_device *dev,
struct mei_cl *cl,
struct mei_hbm_cl_cmd *cmd)
{
struct hbm_notification_response *rs =
(struct hbm_notification_response *)cmd;
cl_dbg(dev, cl, "hbm: notify start response status=%d\n", rs->status);
if (rs->status == MEI_HBMS_SUCCESS ||
rs->status == MEI_HBMS_ALREADY_STARTED) {
cl->notify_en = true;
cl->status = 0;
} else {
cl->status = -EINVAL;
}
}
/**
* mei_hbm_cl_notify_stop_res - update the client state according
* notify stop response
*
* @dev: the device structure
* @cl: mei host client
* @cmd: client notification stop response command
*/
static void mei_hbm_cl_notify_stop_res(struct mei_device *dev,
struct mei_cl *cl,
struct mei_hbm_cl_cmd *cmd)
{
struct hbm_notification_response *rs =
(struct hbm_notification_response *)cmd;
cl_dbg(dev, cl, "hbm: notify stop response status=%d\n", rs->status);
if (rs->status == MEI_HBMS_SUCCESS ||
rs->status == MEI_HBMS_NOT_STARTED) {
cl->notify_en = false;
cl->status = 0;
} else {
/* TODO: spec is not clear yet about other possible issues */
cl->status = -EINVAL;
}
}
/**
* mei_hbm_cl_notify - signal notification event
*
* @dev: the device structure
* @cmd: notification client message
*/
static void mei_hbm_cl_notify(struct mei_device *dev,
struct mei_hbm_cl_cmd *cmd)
{
struct mei_cl *cl;
cl = mei_hbm_cl_find_by_cmd(dev, cmd);
if (cl)
mei_cl_notify(cl);
}
/**
* mei_hbm_prop_req - request property for a single client
*
@ -610,8 +787,11 @@ static void mei_hbm_cl_connect_res(struct mei_device *dev, struct mei_cl *cl,
if (rs->status == MEI_CL_CONN_SUCCESS)
cl->state = MEI_FILE_CONNECTED;
else
else {
cl->state = MEI_FILE_DISCONNECT_REPLY;
if (rs->status == MEI_CL_CONN_NOT_FOUND)
mei_me_cl_del(dev, cl->me_cl);
}
cl->status = mei_cl_conn_status_to_errno(rs->status);
}
@ -654,6 +834,12 @@ static void mei_hbm_cl_res(struct mei_device *dev,
case MEI_FOP_DISCONNECT:
mei_hbm_cl_disconnect_res(dev, cl, rs);
break;
case MEI_FOP_NOTIFY_START:
mei_hbm_cl_notify_start_res(dev, cl, rs);
break;
case MEI_FOP_NOTIFY_STOP:
mei_hbm_cl_notify_stop_res(dev, cl, rs);
break;
default:
return;
}
@ -693,6 +879,79 @@ static int mei_hbm_fw_disconnect_req(struct mei_device *dev,
return 0;
}
/**
* mei_hbm_pg_enter_res - PG enter response received
*
* @dev: the device structure.
*
* Return: 0 on success, -EPROTO on state mismatch
*/
static int mei_hbm_pg_enter_res(struct mei_device *dev)
{
if (mei_pg_state(dev) != MEI_PG_OFF ||
dev->pg_event != MEI_PG_EVENT_WAIT) {
dev_err(dev->dev, "hbm: pg entry response: state mismatch [%s, %d]\n",
mei_pg_state_str(mei_pg_state(dev)), dev->pg_event);
return -EPROTO;
}
dev->pg_event = MEI_PG_EVENT_RECEIVED;
wake_up(&dev->wait_pg);
return 0;
}
/**
* mei_hbm_pg_resume - process with PG resume
*
* @dev: the device structure.
*/
void mei_hbm_pg_resume(struct mei_device *dev)
{
pm_request_resume(dev->dev);
}
EXPORT_SYMBOL_GPL(mei_hbm_pg_resume);
/**
* mei_hbm_pg_exit_res - PG exit response received
*
* @dev: the device structure.
*
* Return: 0 on success, -EPROTO on state mismatch
*/
static int mei_hbm_pg_exit_res(struct mei_device *dev)
{
if (mei_pg_state(dev) != MEI_PG_ON ||
(dev->pg_event != MEI_PG_EVENT_WAIT &&
dev->pg_event != MEI_PG_EVENT_IDLE)) {
dev_err(dev->dev, "hbm: pg exit response: state mismatch [%s, %d]\n",
mei_pg_state_str(mei_pg_state(dev)), dev->pg_event);
return -EPROTO;
}
switch (dev->pg_event) {
case MEI_PG_EVENT_WAIT:
dev->pg_event = MEI_PG_EVENT_RECEIVED;
wake_up(&dev->wait_pg);
break;
case MEI_PG_EVENT_IDLE:
/*
* If the driver is not waiting on this then
* this is HW initiated exit from PG.
* Start runtime pm resume sequence to exit from PG.
*/
dev->pg_event = MEI_PG_EVENT_RECEIVED;
mei_hbm_pg_resume(dev);
break;
default:
WARN(1, "hbm: pg exit response: unexpected pg event = %d\n",
dev->pg_event);
return -EPROTO;
}
return 0;
}
/**
* mei_hbm_config_features - check what hbm features and commands
* are supported by the fw
@ -709,6 +968,17 @@ static void mei_hbm_config_features(struct mei_device *dev)
if (dev->version.major_version == HBM_MAJOR_VERSION_PGI &&
dev->version.minor_version >= HBM_MINOR_VERSION_PGI)
dev->hbm_f_pg_supported = 1;
if (dev->version.major_version >= HBM_MAJOR_VERSION_DC)
dev->hbm_f_dc_supported = 1;
/* disconnect on connect timeout instead of link reset */
if (dev->version.major_version >= HBM_MAJOR_VERSION_DOT)
dev->hbm_f_dot_supported = 1;
/* Notification Event Support */
if (dev->version.major_version >= HBM_MAJOR_VERSION_EV)
dev->hbm_f_ev_supported = 1;
}
/**
@ -740,6 +1010,8 @@ int mei_hbm_dispatch(struct mei_device *dev, struct mei_msg_hdr *hdr)
struct hbm_host_version_response *version_res;
struct hbm_props_response *props_res;
struct hbm_host_enum_response *enum_res;
struct hbm_add_client_request *add_cl_req;
int ret;
struct mei_hbm_cl_cmd *cl_cmd;
struct hbm_client_connect_request *disconnect_req;
@ -828,24 +1100,17 @@ int mei_hbm_dispatch(struct mei_device *dev, struct mei_msg_hdr *hdr)
break;
case MEI_PG_ISOLATION_ENTRY_RES_CMD:
dev_dbg(dev->dev, "power gate isolation entry response received\n");
dev->pg_event = MEI_PG_EVENT_RECEIVED;
if (waitqueue_active(&dev->wait_pg))
wake_up(&dev->wait_pg);
dev_dbg(dev->dev, "hbm: power gate isolation entry response received\n");
ret = mei_hbm_pg_enter_res(dev);
if (ret)
return ret;
break;
case MEI_PG_ISOLATION_EXIT_REQ_CMD:
dev_dbg(dev->dev, "power gate isolation exit request received\n");
dev->pg_event = MEI_PG_EVENT_RECEIVED;
if (waitqueue_active(&dev->wait_pg))
wake_up(&dev->wait_pg);
else
/*
* If the driver is not waiting on this then
* this is HW initiated exit from PG.
* Start runtime pm resume sequence to exit from PG.
*/
pm_request_resume(dev->dev);
dev_dbg(dev->dev, "hbm: power gate isolation exit request received\n");
ret = mei_hbm_pg_exit_res(dev);
if (ret)
return ret;
break;
case HOST_CLIENT_PROPERTIES_RES_CMD:
@ -937,6 +1202,39 @@ int mei_hbm_dispatch(struct mei_device *dev, struct mei_msg_hdr *hdr)
return -EIO;
}
break;
case MEI_HBM_ADD_CLIENT_REQ_CMD:
dev_dbg(dev->dev, "hbm: add client request received\n");
/*
* after the host receives the enum_resp
* message clients may be added or removed
*/
if (dev->hbm_state <= MEI_HBM_ENUM_CLIENTS &&
dev->hbm_state >= MEI_HBM_STOPPED) {
dev_err(dev->dev, "hbm: add client: state mismatch, [%d, %d]\n",
dev->dev_state, dev->hbm_state);
return -EPROTO;
}
add_cl_req = (struct hbm_add_client_request *)mei_msg;
ret = mei_hbm_fw_add_cl_req(dev, add_cl_req);
if (ret) {
dev_err(dev->dev, "hbm: add client: failed to send response %d\n",
ret);
return -EIO;
}
dev_dbg(dev->dev, "hbm: add client request processed\n");
break;
case MEI_HBM_NOTIFY_RES_CMD:
dev_dbg(dev->dev, "hbm: notify response received\n");
mei_hbm_cl_res(dev, cl_cmd, notify_res_to_fop(cl_cmd));
break;
case MEI_HBM_NOTIFICATION_CMD:
dev_dbg(dev->dev, "hbm: notification\n");
mei_hbm_cl_notify(dev, cl_cmd);
break;
default:
BUG();
break;

3
drivers/misc/mei/hbm.h
View File

@ -54,6 +54,9 @@ int mei_hbm_cl_disconnect_rsp(struct mei_device *dev, struct mei_cl *cl);
int mei_hbm_cl_connect_req(struct mei_device *dev, struct mei_cl *cl);
bool mei_hbm_version_is_supported(struct mei_device *dev);
int mei_hbm_pg(struct mei_device *dev, u8 pg_cmd);
void mei_hbm_pg_resume(struct mei_device *dev);
int mei_hbm_cl_notify_req(struct mei_device *dev,
struct mei_cl *cl, u8 request);
#endif /* _MEI_HBM_H_ */

27
drivers/misc/mei/hw-me-regs.h
View File

@ -117,12 +117,17 @@
#define MEI_DEV_ID_WPT_LP 0x9CBA /* Wildcat Point LP */
#define MEI_DEV_ID_WPT_LP_2 0x9CBB /* Wildcat Point LP 2 */
#define MEI_DEV_ID_SPT 0x9D3A /* Sunrise Point */
#define MEI_DEV_ID_SPT_2 0x9D3B /* Sunrise Point 2 */
#define MEI_DEV_ID_SPT_H 0xA13A /* Sunrise Point H */
#define MEI_DEV_ID_SPT_H_2 0xA13B /* Sunrise Point H 2 */
/*
* MEI HW Section
*/
/* Host Firmware Status Registers in PCI Config Space */
#define PCI_CFG_HFS_1 0x40
# define PCI_CFG_HFS_1_D0I3_MSK 0x80000000
#define PCI_CFG_HFS_2 0x48
#define PCI_CFG_HFS_3 0x60
#define PCI_CFG_HFS_4 0x64
@ -140,7 +145,8 @@
#define ME_CSR_HA 0xC
/* H_HGC_CSR - PGI register */
#define H_HPG_CSR 0x10
/* H_D0I3C - D0I3 Control */
#define H_D0I3C 0x800
/* register bits of H_CSR (Host Control Status register) */
/* Host Circular Buffer Depth - maximum number of 32-bit entries in CB */
@ -159,7 +165,14 @@
#define H_IS 0x00000002
/* Host Interrupt Enable */
#define H_IE 0x00000001
/* Host D0I3 Interrupt Enable */
#define H_D0I3C_IE 0x00000020
/* Host D0I3 Interrupt Status */
#define H_D0I3C_IS 0x00000040
/* H_CSR masks */
#define H_CSR_IE_MASK (H_IE | H_D0I3C_IE)
#define H_CSR_IS_MASK (H_IS | H_D0I3C_IS)
/* register bits of ME_CSR_HA (ME Control Status Host Access register) */
/* ME CB (Circular Buffer) Depth HRA (Host Read Access) - host read only
@ -183,8 +196,14 @@ access to ME_CBD */
#define ME_IE_HRA 0x00000001
/* register bits - H_HPG_CSR */
#define H_HPG_CSR_PGIHEXR 0x00000001
#define H_HPG_CSR_PGI 0x00000002
/* H_HPG_CSR register bits */
#define H_HPG_CSR_PGIHEXR 0x00000001
#define H_HPG_CSR_PGI 0x00000002
/* H_D0I3C register bits */
#define H_D0I3C_CIP 0x00000001
#define H_D0I3C_IR 0x00000002
#define H_D0I3C_I3 0x00000004
#define H_D0I3C_RR 0x00000008
#endif /* _MEI_HW_MEI_REGS_H_ */

499
drivers/misc/mei/hw-me.c
View File

@ -134,10 +134,39 @@ static inline void mei_hcsr_write(struct mei_device *dev, u32 reg)
*/
static inline void mei_hcsr_set(struct mei_device *dev, u32 reg)
{
reg &= ~H_IS;
reg &= ~H_CSR_IS_MASK;
mei_hcsr_write(dev, reg);
}
/**
* mei_me_d0i3c_read - Reads 32bit data from the D0I3C register
*
* @dev: the device structure
*
* Return: H_D0I3C register value (u32)
*/
static inline u32 mei_me_d0i3c_read(const struct mei_device *dev)
{
u32 reg;
reg = mei_me_reg_read(to_me_hw(dev), H_D0I3C);
trace_mei_reg_read(dev->dev, "H_D0I3C", H_CSR, reg);
return reg;
}
/**
* mei_me_d0i3c_write - writes H_D0I3C register to device
*
* @dev: the device structure
* @reg: new register value
*/
static inline void mei_me_d0i3c_write(struct mei_device *dev, u32 reg)
{
trace_mei_reg_write(dev->dev, "H_D0I3C", H_CSR, reg);
mei_me_reg_write(to_me_hw(dev), H_D0I3C, reg);
}
/**
* mei_me_fw_status - read fw status register from pci config space
*
@ -176,12 +205,25 @@ static int mei_me_fw_status(struct mei_device *dev,
*/
static void mei_me_hw_config(struct mei_device *dev)
{
struct pci_dev *pdev = to_pci_dev(dev->dev);
struct mei_me_hw *hw = to_me_hw(dev);
u32 hcsr = mei_hcsr_read(dev);
u32 hcsr, reg;
/* Doesn't change in runtime */
hcsr = mei_hcsr_read(dev);
dev->hbuf_depth = (hcsr & H_CBD) >> 24;
reg = 0;
pci_read_config_dword(pdev, PCI_CFG_HFS_1, &reg);
hw->d0i3_supported =
((reg & PCI_CFG_HFS_1_D0I3_MSK) == PCI_CFG_HFS_1_D0I3_MSK);
hw->pg_state = MEI_PG_OFF;
if (hw->d0i3_supported) {
reg = mei_me_d0i3c_read(dev);
if (reg & H_D0I3C_I3)
hw->pg_state = MEI_PG_ON;
}
}
/**
@ -208,7 +250,7 @@ static void mei_me_intr_clear(struct mei_device *dev)
{
u32 hcsr = mei_hcsr_read(dev);
if ((hcsr & H_IS) == H_IS)
if (hcsr & H_CSR_IS_MASK)
mei_hcsr_write(dev, hcsr);
}
/**
@ -220,7 +262,7 @@ static void mei_me_intr_enable(struct mei_device *dev)
{
u32 hcsr = mei_hcsr_read(dev);
hcsr |= H_IE;
hcsr |= H_CSR_IE_MASK;
mei_hcsr_set(dev, hcsr);
}
@ -233,7 +275,7 @@ static void mei_me_intr_disable(struct mei_device *dev)
{
u32 hcsr = mei_hcsr_read(dev);
hcsr &= ~H_IE;
hcsr &= ~H_CSR_IE_MASK;
mei_hcsr_set(dev, hcsr);
}
@ -253,57 +295,6 @@ static void mei_me_hw_reset_release(struct mei_device *dev)
/* complete this write before we set host ready on another CPU */
mmiowb();
}
/**
* mei_me_hw_reset - resets fw via mei csr register.
*
* @dev: the device structure
* @intr_enable: if interrupt should be enabled after reset.
*
* Return: always 0
*/
static int mei_me_hw_reset(struct mei_device *dev, bool intr_enable)
{
u32 hcsr = mei_hcsr_read(dev);
/* H_RST may be found lit before reset is started,
* for example if preceding reset flow hasn't completed.
* In that case asserting H_RST will be ignored, therefore
* we need to clean H_RST bit to start a successful reset sequence.
*/
if ((hcsr & H_RST) == H_RST) {
dev_warn(dev->dev, "H_RST is set = 0x%08X", hcsr);
hcsr &= ~H_RST;
mei_hcsr_set(dev, hcsr);
hcsr = mei_hcsr_read(dev);
}
hcsr |= H_RST | H_IG | H_IS;
if (intr_enable)
hcsr |= H_IE;
else
hcsr &= ~H_IE;
dev->recvd_hw_ready = false;
mei_hcsr_write(dev, hcsr);
/*
* Host reads the H_CSR once to ensure that the
* posted write to H_CSR completes.
*/
hcsr = mei_hcsr_read(dev);
if ((hcsr & H_RST) == 0)
dev_warn(dev->dev, "H_RST is not set = 0x%08X", hcsr);
if ((hcsr & H_RDY) == H_RDY)
dev_warn(dev->dev, "H_RDY is not cleared 0x%08X", hcsr);
if (intr_enable == false)
mei_me_hw_reset_release(dev);
return 0;
}
/**
* mei_me_host_set_ready - enable device
@ -314,7 +305,7 @@ static void mei_me_host_set_ready(struct mei_device *dev)
{
u32 hcsr = mei_hcsr_read(dev);
hcsr |= H_IE | H_IG | H_RDY;
hcsr |= H_CSR_IE_MASK | H_IG | H_RDY;
mei_hcsr_set(dev, hcsr);
}
@ -601,13 +592,13 @@ static void mei_me_pg_unset(struct mei_device *dev)
}
/**
* mei_me_pg_enter_sync - perform pg entry procedure
* mei_me_pg_legacy_enter_sync - perform legacy pg entry procedure
*
* @dev: the device structure
*
* Return: 0 on success an error code otherwise
*/
int mei_me_pg_enter_sync(struct mei_device *dev)
static int mei_me_pg_legacy_enter_sync(struct mei_device *dev)
{
struct mei_me_hw *hw = to_me_hw(dev);
unsigned long timeout = mei_secs_to_jiffies(MEI_PGI_TIMEOUT);
@ -638,13 +629,13 @@ int mei_me_pg_enter_sync(struct mei_device *dev)
}
/**
* mei_me_pg_exit_sync - perform pg exit procedure
* mei_me_pg_legacy_exit_sync - perform legacy pg exit procedure
*
* @dev: the device structure
*
* Return: 0 on success an error code otherwise
*/
int mei_me_pg_exit_sync(struct mei_device *dev)
static int mei_me_pg_legacy_exit_sync(struct mei_device *dev)
{
struct mei_me_hw *hw = to_me_hw(dev);
unsigned long timeout = mei_secs_to_jiffies(MEI_PGI_TIMEOUT);
@ -712,8 +703,12 @@ static bool mei_me_pg_in_transition(struct mei_device *dev)
*/
static bool mei_me_pg_is_enabled(struct mei_device *dev)
{
struct mei_me_hw *hw = to_me_hw(dev);
u32 reg = mei_me_mecsr_read(dev);
if (hw->d0i3_supported)
return true;
if ((reg & ME_PGIC_HRA) == 0)
goto notsupported;
@ -723,7 +718,8 @@ static bool mei_me_pg_is_enabled(struct mei_device *dev)
return true;
notsupported:
dev_dbg(dev->dev, "pg: not supported: HGP = %d hbm version %d.%d ?= %d.%d\n",
dev_dbg(dev->dev, "pg: not supported: d0i3 = %d HGP = %d hbm version %d.%d ?= %d.%d\n",
hw->d0i3_supported,
!!(reg & ME_PGIC_HRA),
dev->version.major_version,
dev->version.minor_version,
@ -734,11 +730,211 @@ notsupported:
}
/**
* mei_me_pg_intr - perform pg processing in interrupt thread handler
* mei_me_d0i3_set - write d0i3 register bit on mei device.
*
* @dev: the device structure
* @intr: ask for interrupt
*
* Return: D0I3C register value
*/
static u32 mei_me_d0i3_set(struct mei_device *dev, bool intr)
{
u32 reg = mei_me_d0i3c_read(dev);
reg |= H_D0I3C_I3;
if (intr)
reg |= H_D0I3C_IR;
else
reg &= ~H_D0I3C_IR;
mei_me_d0i3c_write(dev, reg);
/* read it to ensure HW consistency */
reg = mei_me_d0i3c_read(dev);
return reg;
}
/**
* mei_me_d0i3_unset - clean d0i3 register bit on mei device.
*
* @dev: the device structure
*
* Return: D0I3C register value
*/
static u32 mei_me_d0i3_unset(struct mei_device *dev)
{
u32 reg = mei_me_d0i3c_read(dev);
reg &= ~H_D0I3C_I3;
reg |= H_D0I3C_IR;
mei_me_d0i3c_write(dev, reg);
/* read it to ensure HW consistency */
reg = mei_me_d0i3c_read(dev);
return reg;
}
/**
* mei_me_d0i3_enter_sync - perform d0i3 entry procedure
*
* @dev: the device structure
*
* Return: 0 on success an error code otherwise
*/
static int mei_me_d0i3_enter_sync(struct mei_device *dev)
{
struct mei_me_hw *hw = to_me_hw(dev);
unsigned long d0i3_timeout = mei_secs_to_jiffies(MEI_D0I3_TIMEOUT);
unsigned long pgi_timeout = mei_secs_to_jiffies(MEI_PGI_TIMEOUT);
int ret;
u32 reg;
reg = mei_me_d0i3c_read(dev);
if (reg & H_D0I3C_I3) {
/* we are in d0i3, nothing to do */
dev_dbg(dev->dev, "d0i3 set not needed\n");
ret = 0;
goto on;
}
/* PGI entry procedure */
dev->pg_event = MEI_PG_EVENT_WAIT;
ret = mei_hbm_pg(dev, MEI_PG_ISOLATION_ENTRY_REQ_CMD);
if (ret)
/* FIXME: should we reset here? */
goto out;
mutex_unlock(&dev->device_lock);
wait_event_timeout(dev->wait_pg,
dev->pg_event == MEI_PG_EVENT_RECEIVED, pgi_timeout);
mutex_lock(&dev->device_lock);
if (dev->pg_event != MEI_PG_EVENT_RECEIVED) {
ret = -ETIME;
goto out;
}
/* end PGI entry procedure */
dev->pg_event = MEI_PG_EVENT_INTR_WAIT;
reg = mei_me_d0i3_set(dev, true);
if (!(reg & H_D0I3C_CIP)) {
dev_dbg(dev->dev, "d0i3 enter wait not needed\n");
ret = 0;
goto on;
}
mutex_unlock(&dev->device_lock);
wait_event_timeout(dev->wait_pg,
dev->pg_event == MEI_PG_EVENT_INTR_RECEIVED, d0i3_timeout);
mutex_lock(&dev->device_lock);
if (dev->pg_event != MEI_PG_EVENT_INTR_RECEIVED) {
reg = mei_me_d0i3c_read(dev);
if (!(reg & H_D0I3C_I3)) {
ret = -ETIME;
goto out;
}
}
ret = 0;
on:
hw->pg_state = MEI_PG_ON;
out:
dev->pg_event = MEI_PG_EVENT_IDLE;
dev_dbg(dev->dev, "d0i3 enter ret = %d\n", ret);
return ret;
}
/**
* mei_me_d0i3_enter - perform d0i3 entry procedure
* no hbm PG handshake
* no waiting for confirmation; runs with interrupts
* disabled
*
* @dev: the device structure
*
* Return: 0 on success an error code otherwise
*/
static int mei_me_d0i3_enter(struct mei_device *dev)
{
struct mei_me_hw *hw = to_me_hw(dev);
u32 reg;
reg = mei_me_d0i3c_read(dev);
if (reg & H_D0I3C_I3) {
/* we are in d0i3, nothing to do */
dev_dbg(dev->dev, "already d0i3 : set not needed\n");
goto on;
}
mei_me_d0i3_set(dev, false);
on:
hw->pg_state = MEI_PG_ON;
dev->pg_event = MEI_PG_EVENT_IDLE;
dev_dbg(dev->dev, "d0i3 enter\n");
return 0;
}
/**
* mei_me_d0i3_exit_sync - perform d0i3 exit procedure
*
* @dev: the device structure
*
* Return: 0 on success an error code otherwise
*/
static int mei_me_d0i3_exit_sync(struct mei_device *dev)
{
struct mei_me_hw *hw = to_me_hw(dev);
unsigned long timeout = mei_secs_to_jiffies(MEI_D0I3_TIMEOUT);
int ret;
u32 reg;
dev->pg_event = MEI_PG_EVENT_INTR_WAIT;
reg = mei_me_d0i3c_read(dev);
if (!(reg & H_D0I3C_I3)) {
/* we are not in d0i3, nothing to do */
dev_dbg(dev->dev, "d0i3 exit not needed\n");
ret = 0;
goto off;
}
reg = mei_me_d0i3_unset(dev);
if (!(reg & H_D0I3C_CIP)) {
dev_dbg(dev->dev, "d0i3 exit wait not needed\n");
ret = 0;
goto off;
}
mutex_unlock(&dev->device_lock);
wait_event_timeout(dev->wait_pg,
dev->pg_event == MEI_PG_EVENT_INTR_RECEIVED, timeout);
mutex_lock(&dev->device_lock);
if (dev->pg_event != MEI_PG_EVENT_INTR_RECEIVED) {
reg = mei_me_d0i3c_read(dev);
if (reg & H_D0I3C_I3) {
ret = -ETIME;
goto out;
}
}
ret = 0;
off:
hw->pg_state = MEI_PG_OFF;
out:
dev->pg_event = MEI_PG_EVENT_IDLE;
dev_dbg(dev->dev, "d0i3 exit ret = %d\n", ret);
return ret;
}
/**
* mei_me_pg_legacy_intr - perform legacy pg processing
* in interrupt thread handler
*
* @dev: the device structure
*/
static void mei_me_pg_intr(struct mei_device *dev)
static void mei_me_pg_legacy_intr(struct mei_device *dev)
{
struct mei_me_hw *hw = to_me_hw(dev);
@ -751,6 +947,162 @@ static void mei_me_pg_intr(struct mei_device *dev)
wake_up(&dev->wait_pg);
}
/**
* mei_me_d0i3_intr - perform d0i3 processing in interrupt thread handler
*
* @dev: the device structure
*/
static void mei_me_d0i3_intr(struct mei_device *dev)
{
struct mei_me_hw *hw = to_me_hw(dev);
if (dev->pg_event == MEI_PG_EVENT_INTR_WAIT &&
(hw->intr_source & H_D0I3C_IS)) {
dev->pg_event = MEI_PG_EVENT_INTR_RECEIVED;
if (hw->pg_state == MEI_PG_ON) {
hw->pg_state = MEI_PG_OFF;
if (dev->hbm_state != MEI_HBM_IDLE) {
/*
* force H_RDY because it could be
* wiped off during PG
*/
dev_dbg(dev->dev, "d0i3 set host ready\n");
mei_me_host_set_ready(dev);
}
} else {
hw->pg_state = MEI_PG_ON;
}
wake_up(&dev->wait_pg);
}
if (hw->pg_state == MEI_PG_ON && (hw->intr_source & H_IS)) {
/*
* HW sent some data and we are in D0i3, so
* we got here because of HW initiated exit from D0i3.
* Start runtime pm resume sequence to exit low power state.
*/
dev_dbg(dev->dev, "d0i3 want resume\n");
mei_hbm_pg_resume(dev);
}
}
/**
* mei_me_pg_intr - perform pg processing in interrupt thread handler
*
* @dev: the device structure
*/
static void mei_me_pg_intr(struct mei_device *dev)
{
struct mei_me_hw *hw = to_me_hw(dev);
if (hw->d0i3_supported)
mei_me_d0i3_intr(dev);
else
mei_me_pg_legacy_intr(dev);
}
/**
* mei_me_pg_enter_sync - perform runtime pm entry procedure
*
* @dev: the device structure
*
* Return: 0 on success an error code otherwise
*/
int mei_me_pg_enter_sync(struct mei_device *dev)
{
struct mei_me_hw *hw = to_me_hw(dev);
if (hw->d0i3_supported)
return mei_me_d0i3_enter_sync(dev);
else
return mei_me_pg_legacy_enter_sync(dev);
}
/**
* mei_me_pg_exit_sync - perform runtime pm exit procedure
*
* @dev: the device structure
*
* Return: 0 on success an error code otherwise
*/
int mei_me_pg_exit_sync(struct mei_device *dev)
{
struct mei_me_hw *hw = to_me_hw(dev);
if (hw->d0i3_supported)
return mei_me_d0i3_exit_sync(dev);
else
return mei_me_pg_legacy_exit_sync(dev);
}
/**
* mei_me_hw_reset - resets fw via mei csr register.
*
* @dev: the device structure
* @intr_enable: if interrupt should be enabled after reset.
*
* Return: 0 on success an error code otherwise
*/
static int mei_me_hw_reset(struct mei_device *dev, bool intr_enable)
{
struct mei_me_hw *hw = to_me_hw(dev);
int ret;
u32 hcsr;
if (intr_enable) {
mei_me_intr_enable(dev);
if (hw->d0i3_supported) {
ret = mei_me_d0i3_exit_sync(dev);
if (ret)
return ret;
}
}
hcsr = mei_hcsr_read(dev);
/* H_RST may be found lit before reset is started,
* for example if preceding reset flow hasn't completed.
* In that case asserting H_RST will be ignored, therefore
* we need to clean H_RST bit to start a successful reset sequence.
*/
if ((hcsr & H_RST) == H_RST) {
dev_warn(dev->dev, "H_RST is set = 0x%08X", hcsr);
hcsr &= ~H_RST;
mei_hcsr_set(dev, hcsr);
hcsr = mei_hcsr_read(dev);
}
hcsr |= H_RST | H_IG | H_CSR_IS_MASK;
if (!intr_enable)
hcsr &= ~H_CSR_IE_MASK;
dev->recvd_hw_ready = false;
mei_hcsr_write(dev, hcsr);
/*
* Host reads the H_CSR once to ensure that the
* posted write to H_CSR completes.
*/
hcsr = mei_hcsr_read(dev);
if ((hcsr & H_RST) == 0)
dev_warn(dev->dev, "H_RST is not set = 0x%08X", hcsr);
if ((hcsr & H_RDY) == H_RDY)
dev_warn(dev->dev, "H_RDY is not cleared 0x%08X", hcsr);
if (!intr_enable) {
mei_me_hw_reset_release(dev);
if (hw->d0i3_supported) {
ret = mei_me_d0i3_enter(dev);
if (ret)
return ret;
}
}
return 0;
}
/**
* mei_me_irq_quick_handler - The ISR of the MEI device
*
@ -759,16 +1111,20 @@ static void mei_me_pg_intr(struct mei_device *dev)
*
* Return: irqreturn_t
*/
irqreturn_t mei_me_irq_quick_handler(int irq, void *dev_id)
{
struct mei_device *dev = (struct mei_device *) dev_id;
u32 hcsr = mei_hcsr_read(dev);
struct mei_device *dev = (struct mei_device *)dev_id;
struct mei_me_hw *hw = to_me_hw(dev);
u32 hcsr;
if ((hcsr & H_IS) != H_IS)
hcsr = mei_hcsr_read(dev);
if (!(hcsr & H_CSR_IS_MASK))
return IRQ_NONE;
/* clear H_IS bit in H_CSR */
hw->intr_source = hcsr & H_CSR_IS_MASK;
dev_dbg(dev->dev, "interrupt source 0x%08X.\n", hw->intr_source);
/* clear H_IS and H_D0I3C_IS bits in H_CSR to clear the interrupts */
mei_hcsr_write(dev, hcsr);
return IRQ_WAKE_THREAD;
@ -796,11 +1152,6 @@ irqreturn_t mei_me_irq_thread_handler(int irq, void *dev_id)
mutex_lock(&dev->device_lock);
mei_io_list_init(&complete_list);
/* Ack the interrupt here
* In case of MSI we don't go through the quick handler */
if (pci_dev_msi_enabled(to_pci_dev(dev->dev)))
mei_clear_interrupts(dev);
/* check if ME wants a reset */
if (!mei_hw_is_ready(dev) && dev->dev_state != MEI_DEV_RESETTING) {
dev_warn(dev->dev, "FW not ready: resetting.\n");

8
drivers/misc/mei/hw-me.h
View File

@ -50,13 +50,17 @@ struct mei_cfg {
* struct mei_me_hw - me hw specific data
*
* @cfg: per device generation config and ops
* @mem_addr: io memory address
* @pg_state: power gating state
* @mem_addr: io memory address
* @intr_source: interrupt source
* @pg_state: power gating state
* @d0i3_supported: di03 support
*/
struct mei_me_hw {
const struct mei_cfg *cfg;
void __iomem *mem_addr;
u32 intr_source;
enum mei_pg_state pg_state;
bool d0i3_supported;
};
#define to_me_hw(dev) (struct mei_me_hw *)((dev)->hw)

134
drivers/misc/mei/hw.h
View File

@ -31,14 +31,15 @@
#define MEI_IAMTHIF_STALL_TIMER 12 /* HPS */
#define MEI_IAMTHIF_READ_TIMER 10 /* HPS */
#define MEI_PGI_TIMEOUT 1 /* PG Isolation time response 1 sec */
#define MEI_HBM_TIMEOUT 1 /* 1 second */
#define MEI_PGI_TIMEOUT 1 /* PG Isolation time response 1 sec */
#define MEI_D0I3_TIMEOUT 5 /* D0i3 set/unset max response time */
#define MEI_HBM_TIMEOUT 1 /* 1 second */
/*
* MEI Version
*/
#define HBM_MINOR_VERSION 1
#define HBM_MAJOR_VERSION 1
#define HBM_MINOR_VERSION 0
#define HBM_MAJOR_VERSION 2
/*
* MEI version with PGI support
@ -46,6 +47,24 @@
#define HBM_MINOR_VERSION_PGI 1
#define HBM_MAJOR_VERSION_PGI 1
/*
* MEI version with Dynamic clients support
*/
#define HBM_MINOR_VERSION_DC 0
#define HBM_MAJOR_VERSION_DC 2
/*
* MEI version with disconnect on connection timeout support
*/
#define HBM_MINOR_VERSION_DOT 0
#define HBM_MAJOR_VERSION_DOT 2
/*
* MEI version with notifcation support
*/
#define HBM_MINOR_VERSION_EV 0
#define HBM_MAJOR_VERSION_EV 2
/* Host bus message command opcode */
#define MEI_HBM_CMD_OP_MSK 0x7f
/* Host bus message command RESPONSE */
@ -81,6 +100,13 @@
#define MEI_PG_ISOLATION_EXIT_REQ_CMD 0x0b
#define MEI_PG_ISOLATION_EXIT_RES_CMD 0x8b
#define MEI_HBM_ADD_CLIENT_REQ_CMD 0x0f
#define MEI_HBM_ADD_CLIENT_RES_CMD 0x8f
#define MEI_HBM_NOTIFY_REQ_CMD 0x10
#define MEI_HBM_NOTIFY_RES_CMD 0x90
#define MEI_HBM_NOTIFICATION_CMD 0x11
/*
* MEI Stop Reason
* used by hbm_host_stop_request.reason
@ -136,6 +162,7 @@ enum mei_cl_connect_status {
MEI_CL_CONN_ALREADY_STARTED = MEI_HBMS_ALREADY_EXISTS,
MEI_CL_CONN_OUT_OF_RESOURCES = MEI_HBMS_REJECTED,
MEI_CL_CONN_MESSAGE_SMALL = MEI_HBMS_INVALID_PARAMETER,
MEI_CL_CONN_NOT_ALLOWED = MEI_HBMS_NOT_ALLOWED,
};
/*
@ -213,9 +240,17 @@ struct hbm_me_stop_request {
u8 reserved[2];
} __packed;
/**
* struct hbm_host_enum_request - enumeration request from host to fw
*
* @hbm_cmd: bus message command header
* @allow_add: allow dynamic clients add HBM version >= 2.0
* @reserved: reserved
*/
struct hbm_host_enum_request {
u8 hbm_cmd;
u8 reserved[3];
u8 allow_add;
u8 reserved[2];
} __packed;
struct hbm_host_enum_response {
@ -247,6 +282,38 @@ struct hbm_props_response {
struct mei_client_properties client_properties;
} __packed;
/**
* struct hbm_add_client_request - request to add a client
* might be sent by fw after enumeration has already completed
*
* @hbm_cmd: bus message command header
* @me_addr: address of the client in ME
* @reserved: reserved
* @client_properties: client properties
*/
struct hbm_add_client_request {
u8 hbm_cmd;
u8 me_addr;
u8 reserved[2];
struct mei_client_properties client_properties;
} __packed;
/**
* struct hbm_add_client_response - response to add a client
* sent by the host to report client addition status to fw
*
* @hbm_cmd: bus message command header
* @me_addr: address of the client in ME
* @status: if HBMS_SUCCESS then the client can now accept connections.
* @reserved: reserved
*/
struct hbm_add_client_response {
u8 hbm_cmd;
u8 me_addr;
u8 status;
u8 reserved[1];
} __packed;
/**
* struct hbm_power_gate - power gate request/response
*
@ -298,5 +365,62 @@ struct hbm_flow_control {
u8 reserved[MEI_FC_MESSAGE_RESERVED_LENGTH];
} __packed;
#define MEI_HBM_NOTIFICATION_START 1
#define MEI_HBM_NOTIFICATION_STOP 0
/**
* struct hbm_notification_request - start/stop notification request
*
* @hbm_cmd: bus message command header
* @me_addr: address of the client in ME
* @host_addr: address of the client in the driver
* @start: start = 1 or stop = 0 asynchronous notifications
*/
struct hbm_notification_request {
u8 hbm_cmd;
u8 me_addr;
u8 host_addr;
u8 start;
} __packed;
/**
* struct hbm_notification_response - start/stop notification response
*
* @hbm_cmd: bus message command header
* @me_addr: address of the client in ME
* @host_addr: - address of the client in the driver
* @status: (mei_hbm_status) response status for the request
* - MEI_HBMS_SUCCESS: successful stop/start
* - MEI_HBMS_CLIENT_NOT_FOUND: if the connection could not be found.
* - MEI_HBMS_ALREADY_STARTED: for start requests for a previously
* started notification.
* - MEI_HBMS_NOT_STARTED: for stop request for a connected client for whom
* asynchronous notifications are currently disabled.
*
* @start: start = 1 or stop = 0 asynchronous notifications
* @reserved: reserved
*/
struct hbm_notification_response {
u8 hbm_cmd;
u8 me_addr;
u8 host_addr;
u8 status;
u8 start;
u8 reserved[3];
} __packed;
/**
* struct hbm_notification - notification event
*
* @hbm_cmd: bus message command header
* @me_addr: address of the client in ME
* @host_addr: address of the client in the driver
* @reserved: reserved for alignment
*/
struct hbm_notification {
u8 hbm_cmd;
u8 me_addr;
u8 host_addr;
u8 reserved[1];
} __packed;
#endif

3
drivers/misc/mei/init.c
View File

@ -331,7 +331,7 @@ void mei_stop(struct mei_device *dev)
mei_cancel_work(dev);
mei_nfc_host_exit(dev);
mei_cl_bus_remove_devices(dev);
mutex_lock(&dev->device_lock);
@ -390,6 +390,7 @@ void mei_device_init(struct mei_device *dev,
INIT_LIST_HEAD(&dev->me_clients);
mutex_init(&dev->device_lock);
init_rwsem(&dev->me_clients_rwsem);
mutex_init(&dev->cl_bus_lock);
init_waitqueue_head(&dev->wait_hw_ready);
init_waitqueue_head(&dev->wait_pg);
init_waitqueue_head(&dev->wait_hbm_start);

27
drivers/misc/mei/interrupt.c
View File

@ -403,6 +403,13 @@ int mei_irq_write_handler(struct mei_device *dev, struct mei_cl_cb *cmpl_list)
if (ret)
return ret;
break;
case MEI_FOP_NOTIFY_START:
case MEI_FOP_NOTIFY_STOP:
ret = mei_cl_irq_notify(cl, cb, cmpl_list);
if (ret)
return ret;
break;
default:
BUG();
}
@ -424,6 +431,24 @@ int mei_irq_write_handler(struct mei_device *dev, struct mei_cl_cb *cmpl_list)
EXPORT_SYMBOL_GPL(mei_irq_write_handler);
/**
* mei_connect_timeout - connect/disconnect timeouts
*
* @cl: host client
*/
static void mei_connect_timeout(struct mei_cl *cl)
{
struct mei_device *dev = cl->dev;
if (cl->state == MEI_FILE_CONNECTING) {
if (dev->hbm_f_dot_supported) {
cl->state = MEI_FILE_DISCONNECT_REQUIRED;
wake_up(&cl->wait);
return;
}
}
mei_reset(dev);
}
/**
* mei_timer - timer function.
@ -464,7 +489,7 @@ void mei_timer(struct work_struct *work)
if (cl->timer_count) {
if (--cl->timer_count == 0) {
dev_err(dev->dev, "timer: connect/disconnect timeout.\n");
mei_reset(dev);
mei_connect_timeout(cl);
goto out;
}
}

96
drivers/misc/mei/main.c
View File

@ -445,6 +445,45 @@ end:
return rets;
}
/**
* mei_ioctl_client_notify_request -
* propagate event notification request to client
*
* @file: pointer to file structure
* @request: 0 - disable, 1 - enable
*
* Return: 0 on success , <0 on error
*/
static int mei_ioctl_client_notify_request(struct file *file, u32 request)
{
struct mei_cl *cl = file->private_data;
return mei_cl_notify_request(cl, file, request);
}
/**
* mei_ioctl_client_notify_get - wait for notification request
*
* @file: pointer to file structure
* @notify_get: 0 - disable, 1 - enable
*
* Return: 0 on success , <0 on error
*/
static int mei_ioctl_client_notify_get(struct file *file, u32 *notify_get)
{
struct mei_cl *cl = file->private_data;
bool notify_ev;
bool block = (file->f_flags & O_NONBLOCK) == 0;
int rets;
rets = mei_cl_notify_get(cl, block, &notify_ev);
if (rets)
return rets;
*notify_get = notify_ev ? 1 : 0;
return 0;
}
/**
* mei_ioctl - the IOCTL function
*
@ -459,6 +498,7 @@ static long mei_ioctl(struct file *file, unsigned int cmd, unsigned long data)
struct mei_device *dev;
struct mei_cl *cl = file->private_data;
struct mei_connect_client_data connect_data;
u32 notify_get, notify_req;
int rets;
@ -499,6 +539,33 @@ static long mei_ioctl(struct file *file, unsigned int cmd, unsigned long data)
break;
case IOCTL_MEI_NOTIFY_SET:
dev_dbg(dev->dev, ": IOCTL_MEI_NOTIFY_SET.\n");
if (copy_from_user(&notify_req,
(char __user *)data, sizeof(notify_req))) {
dev_dbg(dev->dev, "failed to copy data from userland\n");
rets = -EFAULT;
goto out;
}
rets = mei_ioctl_client_notify_request(file, notify_req);
break;
case IOCTL_MEI_NOTIFY_GET:
dev_dbg(dev->dev, ": IOCTL_MEI_NOTIFY_GET.\n");
rets = mei_ioctl_client_notify_get(file, &notify_get);
if (rets)
goto out;
dev_dbg(dev->dev, "copy connect data to user\n");
if (copy_to_user((char __user *)data,
&notify_get, sizeof(notify_get))) {
dev_dbg(dev->dev, "failed to copy data to userland\n");
rets = -EFAULT;
goto out;
}
break;
default:
dev_err(dev->dev, ": unsupported ioctl %d.\n", cmd);
rets = -ENOIOCTLCMD;
@ -541,6 +608,7 @@ static unsigned int mei_poll(struct file *file, poll_table *wait)
struct mei_cl *cl = file->private_data;
struct mei_device *dev;
unsigned int mask = 0;
bool notify_en;
if (WARN_ON(!cl || !cl->dev))
return POLLERR;
@ -549,6 +617,7 @@ static unsigned int mei_poll(struct file *file, poll_table *wait)
mutex_lock(&dev->device_lock);
notify_en = cl->notify_en && (req_events & POLLPRI);
if (dev->dev_state != MEI_DEV_ENABLED ||
!mei_cl_is_connected(cl)) {
@ -561,6 +630,12 @@ static unsigned int mei_poll(struct file *file, poll_table *wait)
goto out;
}
if (notify_en) {
poll_wait(file, &cl->ev_wait, wait);
if (cl->notify_ev)
mask |= POLLPRI;
}
if (req_events & (POLLIN | POLLRDNORM)) {
poll_wait(file, &cl->rx_wait, wait);
@ -575,6 +650,26 @@ out:
return mask;
}
/**
* mei_fasync - asynchronous io support
*
* @fd: file descriptor
* @file: pointer to file structure
* @band: band bitmap
*
* Return: poll mask
*/
static int mei_fasync(int fd, struct file *file, int band)
{
struct mei_cl *cl = file->private_data;
if (!mei_cl_is_connected(cl))
return POLLERR;
return fasync_helper(fd, file, band, &cl->ev_async);
}
/**
* fw_status_show - mei device attribute show method
*
@ -627,6 +722,7 @@ static const struct file_operations mei_fops = {
.release = mei_release,
.write = mei_write,
.poll = mei_poll,
.fasync = mei_fasync,
.llseek = no_llseek
};

47
drivers/misc/mei/mei_dev.h
View File

@ -89,6 +89,7 @@ enum file_state {
MEI_FILE_CONNECTED,
MEI_FILE_DISCONNECTING,
MEI_FILE_DISCONNECT_REPLY,
MEI_FILE_DISCONNECT_REQUIRED,
MEI_FILE_DISCONNECTED,
};
@ -135,6 +136,8 @@ enum mei_wd_states {
* @MEI_FOP_CONNECT: connect
* @MEI_FOP_DISCONNECT: disconnect
* @MEI_FOP_DISCONNECT_RSP: disconnect response
* @MEI_FOP_NOTIFY_START: start notification
* @MEI_FOP_NOTIFY_STOP: stop notification
*/
enum mei_cb_file_ops {
MEI_FOP_READ = 0,
@ -142,6 +145,8 @@ enum mei_cb_file_ops {
MEI_FOP_CONNECT,
MEI_FOP_DISCONNECT,
MEI_FOP_DISCONNECT_RSP,
MEI_FOP_NOTIFY_START,
MEI_FOP_NOTIFY_STOP,
};
/*
@ -178,7 +183,7 @@ struct mei_fw_status {
* @client_id: me client id
* @mei_flow_ctrl_creds: flow control credits
* @connect_count: number connections to this client
* @reserved: reserved
* @bus_added: added to bus
*/
struct mei_me_client {
struct list_head list;
@ -187,7 +192,7 @@ struct mei_me_client {
u8 client_id;
u8 mei_flow_ctrl_creds;
u8 connect_count;
u8 reserved;
u8 bus_added;
};
@ -230,18 +235,21 @@ struct mei_cl_cb {
* @tx_wait: wait queue for tx completion
* @rx_wait: wait queue for rx completion
* @wait: wait queue for management operation
* @ev_wait: notification wait queue
* @ev_async: event async notification
* @status: connection status
* @me_cl: fw client connected
* @host_client_id: host id
* @mei_flow_ctrl_creds: transmit flow credentials
* @timer_count: watchdog timer for operation completion
* @reserved: reserved for alignment
* @notify_en: notification - enabled/disabled
* @notify_ev: pending notification event
* @writing_state: state of the tx
* @rd_pending: pending read credits
* @rd_completed: completed read
*
* @device: device on the mei client bus
* @device_link: link to bus clients
* @cldev: device on the mei client bus
*/
struct mei_cl {
struct list_head link;
@ -250,19 +258,21 @@ struct mei_cl {
wait_queue_head_t tx_wait;
wait_queue_head_t rx_wait;
wait_queue_head_t wait;
wait_queue_head_t ev_wait;
struct fasync_struct *ev_async;
int status;
struct mei_me_client *me_cl;
u8 host_client_id;
u8 mei_flow_ctrl_creds;
u8 timer_count;
u8 reserved;
u8 notify_en;
u8 notify_ev;
enum mei_file_transaction_states writing_state;
struct list_head rd_pending;
struct list_head rd_completed;
/* MEI CL bus data */
struct mei_cl_device *device;
struct list_head device_link;
struct mei_cl_device *cldev;
};
/** struct mei_hw_ops
@ -329,21 +339,16 @@ struct mei_hw_ops {
};
/* MEI bus API*/
struct mei_cl_device *mei_cl_add_device(struct mei_device *dev,
struct mei_me_client *me_cl,
struct mei_cl *cl,
char *name);
void mei_cl_remove_device(struct mei_cl_device *device);
void mei_cl_bus_rescan(struct mei_device *bus);
void mei_cl_dev_fixup(struct mei_cl_device *dev);
ssize_t __mei_cl_send(struct mei_cl *cl, u8 *buf, size_t length,
bool blocking);
ssize_t __mei_cl_recv(struct mei_cl *cl, u8 *buf, size_t length);
void mei_cl_bus_rx_event(struct mei_cl *cl);
void mei_cl_bus_remove_devices(struct mei_device *dev);
void mei_cl_bus_notify_event(struct mei_cl *cl);
void mei_cl_bus_remove_devices(struct mei_device *bus);
int mei_cl_bus_init(void);
void mei_cl_bus_exit(void);
struct mei_cl *mei_cl_bus_find_cl_by_uuid(struct mei_device *dev, uuid_le uuid);
/**
* enum mei_pg_event - power gating transition events
@ -416,7 +421,10 @@ const char *mei_pg_state_str(enum mei_pg_state state);
* @wr_msg : the buffer for hbm control messages
*
* @version : HBM protocol version in use
* @hbm_f_pg_supported : hbm feature pgi protocol
* @hbm_f_pg_supported : hbm feature pgi protocol
* @hbm_f_dc_supported : hbm feature dynamic clients
* @hbm_f_dot_supported : hbm feature disconnect on timeout
* @hbm_f_ev_supported : hbm feature event notification
*
* @me_clients_rwsem: rw lock over me_clients list
* @me_clients : list of FW clients
@ -447,6 +455,7 @@ const char *mei_pg_state_str(enum mei_pg_state state);
* @reset_work : work item for the device reset
*
* @device_list : mei client bus list
* @cl_bus_lock : client bus list lock
*
* @dbgfs_dir : debugfs mei root directory
*
@ -509,6 +518,9 @@ struct mei_device {
struct hbm_version version;
unsigned int hbm_f_pg_supported:1;
unsigned int hbm_f_dc_supported:1;
unsigned int hbm_f_dot_supported:1;
unsigned int hbm_f_ev_supported:1;
struct rw_semaphore me_clients_rwsem;
struct list_head me_clients;
@ -543,6 +555,7 @@ struct mei_device {
/* List of bus devices */
struct list_head device_list;
struct mutex cl_bus_lock;
#if IS_ENABLED(CONFIG_DEBUG_FS)
struct dentry *dbgfs_dir;

415
drivers/misc/mei/nfc.c
View File

@ -1,415 +0,0 @@
/*
*
* Intel Management Engine Interface (Intel MEI) Linux driver
* Copyright (c) 2003-2013, Intel Corporation.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
*/
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/device.h>
#include <linux/slab.h>
#include <linux/mei_cl_bus.h>
#include "mei_dev.h"
#include "client.h"
struct mei_nfc_cmd {
u8 command;
u8 status;
u16 req_id;
u32 reserved;
u16 data_size;
u8 sub_command;
u8 data[];
} __packed;
struct mei_nfc_reply {
u8 command;
u8 status;
u16 req_id;
u32 reserved;
u16 data_size;
u8 sub_command;
u8 reply_status;
u8 data[];
} __packed;
struct mei_nfc_if_version {
u8 radio_version_sw[3];
u8 reserved[3];
u8 radio_version_hw[3];
u8 i2c_addr;
u8 fw_ivn;
u8 vendor_id;
u8 radio_type;
} __packed;
struct mei_nfc_connect {
u8 fw_ivn;
u8 vendor_id;
} __packed;
struct mei_nfc_connect_resp {
u8 fw_ivn;
u8 vendor_id;
u16 me_major;
u16 me_minor;
u16 me_hotfix;
u16 me_build;
} __packed;
struct mei_nfc_hci_hdr {
u8 cmd;
u8 status;
u16 req_id;
u32 reserved;
u16 data_size;
} __packed;
#define MEI_NFC_CMD_MAINTENANCE 0x00
#define MEI_NFC_CMD_HCI_SEND 0x01
#define MEI_NFC_CMD_HCI_RECV 0x02
#define MEI_NFC_SUBCMD_CONNECT 0x00
#define MEI_NFC_SUBCMD_IF_VERSION 0x01
#define MEI_NFC_HEADER_SIZE 10
/**
* struct mei_nfc_dev - NFC mei device
*
* @me_cl: NFC me client
* @cl: NFC host client
* @cl_info: NFC info host client
* @init_work: perform connection to the info client
* @fw_ivn: NFC Interface Version Number
* @vendor_id: NFC manufacturer ID
* @radio_type: NFC radio type
* @bus_name: bus name
*
*/
struct mei_nfc_dev {
struct mei_me_client *me_cl;
struct mei_cl *cl;
struct mei_cl *cl_info;
struct work_struct init_work;
u8 fw_ivn;
u8 vendor_id;
u8 radio_type;
char *bus_name;
};
/* UUIDs for NFC F/W clients */
const uuid_le mei_nfc_guid = UUID_LE(0x0bb17a78, 0x2a8e, 0x4c50,
0x94, 0xd4, 0x50, 0x26,
0x67, 0x23, 0x77, 0x5c);
static const uuid_le mei_nfc_info_guid = UUID_LE(0xd2de1625, 0x382d, 0x417d,
0x48, 0xa4, 0xef, 0xab,
0xba, 0x8a, 0x12, 0x06);
/* Vendors */
#define MEI_NFC_VENDOR_INSIDE 0x00
#define MEI_NFC_VENDOR_NXP 0x01
/* Radio types */
#define MEI_NFC_VENDOR_INSIDE_UREAD 0x00
#define MEI_NFC_VENDOR_NXP_PN544 0x01
static void mei_nfc_free(struct mei_nfc_dev *ndev)
{
if (!ndev)
return;
if (ndev->cl) {
list_del(&ndev->cl->device_link);
mei_cl_unlink(ndev->cl);
kfree(ndev->cl);
}
if (ndev->cl_info) {
list_del(&ndev->cl_info->device_link);
mei_cl_unlink(ndev->cl_info);
kfree(ndev->cl_info);
}
mei_me_cl_put(ndev->me_cl);
kfree(ndev);
}
static int mei_nfc_build_bus_name(struct mei_nfc_dev *ndev)
{
struct mei_device *dev;
if (!ndev->cl)
return -ENODEV;
dev = ndev->cl->dev;
switch (ndev->vendor_id) {
case MEI_NFC_VENDOR_INSIDE:
switch (ndev->radio_type) {
case MEI_NFC_VENDOR_INSIDE_UREAD:
ndev->bus_name = "microread";
return 0;
default:
dev_err(dev->dev, "Unknown radio type 0x%x\n",
ndev->radio_type);
return -EINVAL;
}
case MEI_NFC_VENDOR_NXP:
switch (ndev->radio_type) {
case MEI_NFC_VENDOR_NXP_PN544:
ndev->bus_name = "pn544";
return 0;
default:
dev_err(dev->dev, "Unknown radio type 0x%x\n",
ndev->radio_type);
return -EINVAL;
}
default:
dev_err(dev->dev, "Unknown vendor ID 0x%x\n",
ndev->vendor_id);
return -EINVAL;
}
return 0;
}
static int mei_nfc_if_version(struct mei_nfc_dev *ndev)
{
struct mei_device *dev;
struct mei_cl *cl;
struct mei_nfc_cmd cmd;
struct mei_nfc_reply *reply = NULL;
struct mei_nfc_if_version *version;
size_t if_version_length;
int bytes_recv, ret;
cl = ndev->cl_info;
dev = cl->dev;
memset(&cmd, 0, sizeof(struct mei_nfc_cmd));
cmd.command = MEI_NFC_CMD_MAINTENANCE;
cmd.data_size = 1;
cmd.sub_command = MEI_NFC_SUBCMD_IF_VERSION;
ret = __mei_cl_send(cl, (u8 *)&cmd, sizeof(struct mei_nfc_cmd), 1);
if (ret < 0) {
dev_err(dev->dev, "Could not send IF version cmd\n");
return ret;
}
/* to be sure on the stack we alloc memory */
if_version_length = sizeof(struct mei_nfc_reply) +
sizeof(struct mei_nfc_if_version);
reply = kzalloc(if_version_length, GFP_KERNEL);
if (!reply)
return -ENOMEM;
bytes_recv = __mei_cl_recv(cl, (u8 *)reply, if_version_length);
if (bytes_recv < 0 || bytes_recv < sizeof(struct mei_nfc_reply)) {
dev_err(dev->dev, "Could not read IF version\n");
ret = -EIO;
goto err;
}
version = (struct mei_nfc_if_version *)reply->data;
ndev->fw_ivn = version->fw_ivn;
ndev->vendor_id = version->vendor_id;
ndev->radio_type = version->radio_type;
err:
kfree(reply);
return ret;
}
static void mei_nfc_init(struct work_struct *work)
{
struct mei_device *dev;
struct mei_cl_device *cldev;
struct mei_nfc_dev *ndev;
struct mei_cl *cl_info;
struct mei_me_client *me_cl_info;
ndev = container_of(work, struct mei_nfc_dev, init_work);
cl_info = ndev->cl_info;
dev = cl_info->dev;
mutex_lock(&dev->device_lock);
/* check for valid client id */
me_cl_info = mei_me_cl_by_uuid(dev, &mei_nfc_info_guid);
if (!me_cl_info) {
mutex_unlock(&dev->device_lock);
dev_info(dev->dev, "nfc: failed to find the info client\n");
goto err;
}
if (mei_cl_connect(cl_info, me_cl_info, NULL) < 0) {
mei_me_cl_put(me_cl_info);
mutex_unlock(&dev->device_lock);
dev_err(dev->dev, "Could not connect to the NFC INFO ME client");
goto err;
}
mei_me_cl_put(me_cl_info);
mutex_unlock(&dev->device_lock);
if (mei_nfc_if_version(ndev) < 0) {
dev_err(dev->dev, "Could not get the NFC interface version");
goto err;
}
dev_info(dev->dev, "NFC MEI VERSION: IVN 0x%x Vendor ID 0x%x Type 0x%x\n",
ndev->fw_ivn, ndev->vendor_id, ndev->radio_type);
mutex_lock(&dev->device_lock);
if (mei_cl_disconnect(cl_info) < 0) {
mutex_unlock(&dev->device_lock);
dev_err(dev->dev, "Could not disconnect the NFC INFO ME client");
goto err;
}
mutex_unlock(&dev->device_lock);
if (mei_nfc_build_bus_name(ndev) < 0) {
dev_err(dev->dev, "Could not build the bus ID name\n");
return;
}
cldev = mei_cl_add_device(dev, ndev->me_cl, ndev->cl,
ndev->bus_name);
if (!cldev) {
dev_err(dev->dev, "Could not add the NFC device to the MEI bus\n");
goto err;
}
cldev->priv_data = ndev;
return;
err:
mutex_lock(&dev->device_lock);
mei_nfc_free(ndev);
mutex_unlock(&dev->device_lock);
}
int mei_nfc_host_init(struct mei_device *dev, struct mei_me_client *me_cl)
{
struct mei_nfc_dev *ndev;
struct mei_cl *cl_info, *cl;
int ret;
/* in case of internal reset bail out
* as the device is already setup
*/
cl = mei_cl_bus_find_cl_by_uuid(dev, mei_nfc_guid);
if (cl)
return 0;
ndev = kzalloc(sizeof(struct mei_nfc_dev), GFP_KERNEL);
if (!ndev) {
ret = -ENOMEM;
goto err;
}
ndev->me_cl = mei_me_cl_get(me_cl);
if (!ndev->me_cl) {
ret = -ENODEV;
goto err;
}
cl_info = mei_cl_alloc_linked(dev, MEI_HOST_CLIENT_ID_ANY);
if (IS_ERR(cl_info)) {
ret = PTR_ERR(cl_info);
goto err;
}
list_add_tail(&cl_info->device_link, &dev->device_list);
ndev->cl_info = cl_info;
cl = mei_cl_alloc_linked(dev, MEI_HOST_CLIENT_ID_ANY);
if (IS_ERR(cl)) {
ret = PTR_ERR(cl);
goto err;
}
list_add_tail(&cl->device_link, &dev->device_list);
ndev->cl = cl;
INIT_WORK(&ndev->init_work, mei_nfc_init);
schedule_work(&ndev->init_work);
return 0;
err:
mei_nfc_free(ndev);
return ret;
}
void mei_nfc_host_exit(struct mei_device *dev)
{
struct mei_nfc_dev *ndev;
struct mei_cl *cl;
struct mei_cl_device *cldev;
cl = mei_cl_bus_find_cl_by_uuid(dev, mei_nfc_guid);
if (!cl)
return;
cldev = cl->device;
if (!cldev)
return;
ndev = (struct mei_nfc_dev *)cldev->priv_data;
if (ndev)
cancel_work_sync(&ndev->init_work);
cldev->priv_data = NULL;
/* Need to remove the device here
* since mei_nfc_free will unlink the clients
*/
mei_cl_remove_device(cldev);
mutex_lock(&dev->device_lock);
mei_nfc_free(ndev);
mutex_unlock(&dev->device_lock);
}

32
drivers/misc/mei/pci-me.c
View File

@ -82,6 +82,11 @@ static const struct pci_device_id mei_me_pci_tbl[] = {
{MEI_PCI_DEVICE(MEI_DEV_ID_WPT_LP, mei_me_pch8_cfg)},
{MEI_PCI_DEVICE(MEI_DEV_ID_WPT_LP_2, mei_me_pch8_cfg)},
{MEI_PCI_DEVICE(MEI_DEV_ID_SPT, mei_me_pch8_cfg)},
{MEI_PCI_DEVICE(MEI_DEV_ID_SPT_2, mei_me_pch8_cfg)},
{MEI_PCI_DEVICE(MEI_DEV_ID_SPT_H, mei_me_pch8_cfg)},
{MEI_PCI_DEVICE(MEI_DEV_ID_SPT_H_2, mei_me_pch8_cfg)},
/* required last entry */
{0, }
};
@ -128,6 +133,7 @@ static int mei_me_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
const struct mei_cfg *cfg = (struct mei_cfg *)(ent->driver_data);
struct mei_device *dev;
struct mei_me_hw *hw;
unsigned int irqflags;
int err;
@ -180,17 +186,12 @@ static int mei_me_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
pci_enable_msi(pdev);
/* request and enable interrupt */
if (pci_dev_msi_enabled(pdev))
err = request_threaded_irq(pdev->irq,
NULL,
mei_me_irq_thread_handler,
IRQF_ONESHOT, KBUILD_MODNAME, dev);
else
err = request_threaded_irq(pdev->irq,
irqflags = pci_dev_msi_enabled(pdev) ? IRQF_ONESHOT : IRQF_SHARED;
err = request_threaded_irq(pdev->irq,
mei_me_irq_quick_handler,
mei_me_irq_thread_handler,
IRQF_SHARED, KBUILD_MODNAME, dev);
irqflags, KBUILD_MODNAME, dev);
if (err) {
dev_err(&pdev->dev, "request_threaded_irq failure. irq = %d\n",
pdev->irq);
@ -319,6 +320,7 @@ static int mei_me_pci_resume(struct device *device)
{
struct pci_dev *pdev = to_pci_dev(device);
struct mei_device *dev;
unsigned int irqflags;
int err;
dev = pci_get_drvdata(pdev);
@ -327,17 +329,13 @@ static int mei_me_pci_resume(struct device *device)
pci_enable_msi(pdev);
irqflags = pci_dev_msi_enabled(pdev) ? IRQF_ONESHOT : IRQF_SHARED;
/* request and enable interrupt */
if (pci_dev_msi_enabled(pdev))
err = request_threaded_irq(pdev->irq,
NULL,
mei_me_irq_thread_handler,
IRQF_ONESHOT, KBUILD_MODNAME, dev);
else
err = request_threaded_irq(pdev->irq,
err = request_threaded_irq(pdev->irq,
mei_me_irq_quick_handler,
mei_me_irq_thread_handler,
IRQF_SHARED, KBUILD_MODNAME, dev);
irqflags, KBUILD_MODNAME, dev);
if (err) {
dev_err(&pdev->dev, "request_threaded_irq failed: irq = %d.\n",

152
drivers/misc/qcom-coincell.c Normal file
View File

@ -0,0 +1,152 @@
/* Copyright (c) 2013, The Linux Foundation. All rights reserved.
* Copyright (c) 2015, Sony Mobile Communications Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/of.h>
#include <linux/regmap.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
struct qcom_coincell {
struct device *dev;
struct regmap *regmap;
u32 base_addr;
};
#define QCOM_COINCELL_REG_RSET 0x44
#define QCOM_COINCELL_REG_VSET 0x45
#define QCOM_COINCELL_REG_ENABLE 0x46
#define QCOM_COINCELL_ENABLE BIT(7)
static const int qcom_rset_map[] = { 2100, 1700, 1200, 800 };
static const int qcom_vset_map[] = { 2500, 3200, 3100, 3000 };
/* NOTE: for pm8921 and others, voltage of 2500 is 16 (10000b), not 0 */
/* if enable==0, rset and vset are ignored */
static int qcom_coincell_chgr_config(struct qcom_coincell *chgr, int rset,
int vset, bool enable)
{
int i, j, rc;
/* if disabling, just do that and skip other operations */
if (!enable)
return regmap_write(chgr->regmap,
chgr->base_addr + QCOM_COINCELL_REG_ENABLE, 0);
/* find index for current-limiting resistor */
for (i = 0; i < ARRAY_SIZE(qcom_rset_map); i++)
if (rset == qcom_rset_map[i])
break;
if (i >= ARRAY_SIZE(qcom_rset_map)) {
dev_err(chgr->dev, "invalid rset-ohms value %d\n", rset);
return -EINVAL;
}
/* find index for charge voltage */
for (j = 0; j < ARRAY_SIZE(qcom_vset_map); j++)
if (vset == qcom_vset_map[j])
break;
if (j >= ARRAY_SIZE(qcom_vset_map)) {
dev_err(chgr->dev, "invalid vset-millivolts value %d\n", vset);
return -EINVAL;
}
rc = regmap_write(chgr->regmap,
chgr->base_addr + QCOM_COINCELL_REG_RSET, i);
if (rc) {
/*
* This is mainly to flag a bad base_addr (reg) from dts.
* Other failures writing to the registers should be
* extremely rare, or indicative of problems that
* should be reported elsewhere (eg. spmi failure).
*/
dev_err(chgr->dev, "could not write to RSET register\n");
return rc;
}
rc = regmap_write(chgr->regmap,
chgr->base_addr + QCOM_COINCELL_REG_VSET, j);
if (rc)
return rc;
/* set 'enable' register */
return regmap_write(chgr->regmap,
chgr->base_addr + QCOM_COINCELL_REG_ENABLE,
QCOM_COINCELL_ENABLE);
}
static int qcom_coincell_probe(struct platform_device *pdev)
{
struct device_node *node = pdev->dev.of_node;
struct qcom_coincell chgr;
u32 rset, vset;
bool enable;
int rc;
chgr.dev = &pdev->dev;
chgr.regmap = dev_get_regmap(pdev->dev.parent, NULL);
if (!chgr.regmap) {
dev_err(chgr.dev, "Unable to get regmap\n");
return -EINVAL;
}
rc = of_property_read_u32(node, "reg", &chgr.base_addr);
if (rc)
return rc;
enable = !of_property_read_bool(node, "qcom,charger-disable");
if (enable) {
rc = of_property_read_u32(node, "qcom,rset-ohms", &rset);
if (rc) {
dev_err(chgr.dev,
"can't find 'qcom,rset-ohms' in DT block");
return rc;
}
rc = of_property_read_u32(node, "qcom,vset-millivolts", &vset);
if (rc) {
dev_err(chgr.dev,
"can't find 'qcom,vset-millivolts' in DT block");
return rc;
}
}
return qcom_coincell_chgr_config(&chgr, rset, vset, enable);
}
static const struct of_device_id qcom_coincell_match_table[] = {
{ .compatible = "qcom,pm8941-coincell", },
{}
};
MODULE_DEVICE_TABLE(of, qcom_coincell_match_table);
static struct platform_driver qcom_coincell_driver = {
.driver = {
.name = "qcom-spmi-coincell",
.of_match_table = qcom_coincell_match_table,
},
.probe = qcom_coincell_probe,
};
module_platform_driver(qcom_coincell_driver);
MODULE_DESCRIPTION("Qualcomm PMIC coincell charger driver");
MODULE_LICENSE("GPL v2");

105
drivers/misc/ti-st/st_kim.c
View File

@ -36,8 +36,6 @@
#include <linux/skbuff.h>
#include <linux/ti_wilink_st.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_device.h>
#define MAX_ST_DEVICES 3 /* Imagine 1 on each UART for now */
static struct platform_device *st_kim_devices[MAX_ST_DEVICES];
@ -45,9 +43,6 @@ static struct platform_device *st_kim_devices[MAX_ST_DEVICES];
/**********************************************************************/
/* internal functions */
struct ti_st_plat_data *dt_pdata;
static struct ti_st_plat_data *get_platform_data(struct device *dev);
/**
* st_get_plat_device -
* function which returns the reference to the platform device
@ -469,12 +464,7 @@ long st_kim_start(void *kim_data)
struct kim_data_s *kim_gdata = (struct kim_data_s *)kim_data;
pr_info(" %s", __func__);
if (kim_gdata->kim_pdev->dev.of_node) {
pr_debug("use device tree data");
pdata = dt_pdata;
} else {
pdata = kim_gdata->kim_pdev->dev.platform_data;
}
pdata = kim_gdata->kim_pdev->dev.platform_data;
do {
/* platform specific enabling code here */
@ -482,9 +472,9 @@ long st_kim_start(void *kim_data)
pdata->chip_enable(kim_gdata);
/* Configure BT nShutdown to HIGH state */
gpio_set_value(kim_gdata->nshutdown, GPIO_LOW);
gpio_set_value_cansleep(kim_gdata->nshutdown, GPIO_LOW);
mdelay(5); /* FIXME: a proper toggle */
gpio_set_value(kim_gdata->nshutdown, GPIO_HIGH);
gpio_set_value_cansleep(kim_gdata->nshutdown, GPIO_HIGH);
mdelay(100);
/* re-initialize the completion */
reinit_completion(&kim_gdata->ldisc_installed);
@ -534,18 +524,12 @@ long st_kim_stop(void *kim_data)
{
long err = 0;
struct kim_data_s *kim_gdata = (struct kim_data_s *)kim_data;
struct ti_st_plat_data *pdata;
struct ti_st_plat_data *pdata =
kim_gdata->kim_pdev->dev.platform_data;
struct tty_struct *tty = kim_gdata->core_data->tty;
reinit_completion(&kim_gdata->ldisc_installed);
if (kim_gdata->kim_pdev->dev.of_node) {
pr_debug("use device tree data");
pdata = dt_pdata;
} else
pdata = kim_gdata->kim_pdev->dev.platform_data;
if (tty) { /* can be called before ldisc is installed */
/* Flush any pending characters in the driver and discipline. */
tty_ldisc_flush(tty);
@ -566,11 +550,11 @@ long st_kim_stop(void *kim_data)
}
/* By default configure BT nShutdown to LOW state */
gpio_set_value(kim_gdata->nshutdown, GPIO_LOW);
gpio_set_value_cansleep(kim_gdata->nshutdown, GPIO_LOW);
mdelay(1);
gpio_set_value(kim_gdata->nshutdown, GPIO_HIGH);
gpio_set_value_cansleep(kim_gdata->nshutdown, GPIO_HIGH);
mdelay(1);
gpio_set_value(kim_gdata->nshutdown, GPIO_LOW);
gpio_set_value_cansleep(kim_gdata->nshutdown, GPIO_LOW);
/* platform specific disable */
if (pdata->chip_disable)
@ -737,52 +721,13 @@ static const struct file_operations list_debugfs_fops = {
* board-*.c file
*/
static const struct of_device_id kim_of_match[] = {
{
.compatible = "kim",
},
{}
};
MODULE_DEVICE_TABLE(of, kim_of_match);
static struct ti_st_plat_data *get_platform_data(struct device *dev)
{
struct device_node *np = dev->of_node;
const u32 *dt_property;
int len;
dt_pdata = kzalloc(sizeof(*dt_pdata), GFP_KERNEL);
if (!dt_pdata)
return NULL;
dt_property = of_get_property(np, "dev_name", &len);
if (dt_property)
memcpy(&dt_pdata->dev_name, dt_property, len);
of_property_read_u32(np, "nshutdown_gpio",
&dt_pdata->nshutdown_gpio);
of_property_read_u32(np, "flow_cntrl", &dt_pdata->flow_cntrl);
of_property_read_u32(np, "baud_rate", &dt_pdata->baud_rate);
return dt_pdata;
}
static struct dentry *kim_debugfs_dir;
static int kim_probe(struct platform_device *pdev)
{
struct kim_data_s *kim_gdata;
struct ti_st_plat_data *pdata;
struct ti_st_plat_data *pdata = pdev->dev.platform_data;
int err;
if (pdev->dev.of_node)
pdata = get_platform_data(&pdev->dev);
else
pdata = pdev->dev.platform_data;
if (pdata == NULL) {
dev_err(&pdev->dev, "Platform Data is missing\n");
return -ENXIO;
}
if ((pdev->id != -1) && (pdev->id < MAX_ST_DEVICES)) {
/* multiple devices could exist */
st_kim_devices[pdev->id] = pdev;
@ -863,16 +808,9 @@ err_core_init:
static int kim_remove(struct platform_device *pdev)
{
/* free the GPIOs requested */
struct ti_st_plat_data *pdata;
struct ti_st_plat_data *pdata = pdev->dev.platform_data;
struct kim_data_s *kim_gdata;
if (pdev->dev.of_node) {
pr_debug("use device tree data");
pdata = dt_pdata;
} else {
pdata = pdev->dev.platform_data;
}
kim_gdata = platform_get_drvdata(pdev);
/* Free the Bluetooth/FM/GPIO
@ -890,22 +828,12 @@ static int kim_remove(struct platform_device *pdev)
kfree(kim_gdata);
kim_gdata = NULL;
kfree(dt_pdata);
dt_pdata = NULL;
return 0;
}
static int kim_suspend(struct platform_device *pdev, pm_message_t state)
{
struct ti_st_plat_data *pdata;
if (pdev->dev.of_node) {
pr_debug("use device tree data");
pdata = dt_pdata;
} else {
pdata = pdev->dev.platform_data;
}
struct ti_st_plat_data *pdata = pdev->dev.platform_data;
if (pdata->suspend)
return pdata->suspend(pdev, state);
@ -915,14 +843,7 @@ static int kim_suspend(struct platform_device *pdev, pm_message_t state)
static int kim_resume(struct platform_device *pdev)
{
struct ti_st_plat_data *pdata;
if (pdev->dev.of_node) {
pr_debug("use device tree data");
pdata = dt_pdata;
} else {
pdata = pdev->dev.platform_data;
}
struct ti_st_plat_data *pdata = pdev->dev.platform_data;
if (pdata->resume)
return pdata->resume(pdev);
@ -939,8 +860,6 @@ static struct platform_driver kim_platform_driver = {
.resume = kim_resume,
.driver = {
.name = "kim",
.owner = THIS_MODULE,
.of_match_table = of_match_ptr(kim_of_match),
},
};

17
drivers/misc/ti-st/st_ll.c
View File

@ -26,7 +26,6 @@
#include <linux/ti_wilink_st.h>
/**********************************************************************/
/* internal functions */
static void send_ll_cmd(struct st_data_s *st_data,
unsigned char cmd)
@ -54,13 +53,7 @@ static void ll_device_want_to_sleep(struct st_data_s *st_data)
/* communicate to platform about chip asleep */
kim_data = st_data->kim_data;
if (kim_data->kim_pdev->dev.of_node) {
pr_debug("use device tree data");
pdata = dt_pdata;
} else {
pdata = kim_data->kim_pdev->dev.platform_data;
}
pdata = kim_data->kim_pdev->dev.platform_data;
if (pdata->chip_asleep)
pdata->chip_asleep(NULL);
}
@ -93,13 +86,7 @@ static void ll_device_want_to_wakeup(struct st_data_s *st_data)
/* communicate to platform about chip wakeup */
kim_data = st_data->kim_data;
if (kim_data->kim_pdev->dev.of_node) {
pr_debug("use device tree data");
pdata = dt_pdata;
} else {
pdata = kim_data->kim_pdev->dev.platform_data;
}
pdata = kim_data->kim_pdev->dev.platform_data;
if (pdata->chip_awake)
pdata->chip_awake(NULL);
}

1
drivers/misc/tsl2550.c
View File

@ -446,7 +446,6 @@ MODULE_DEVICE_TABLE(i2c, tsl2550_id);
static struct i2c_driver tsl2550_driver = {
.driver = {
.name = TSL2550_DRV_NAME,
.owner = THIS_MODULE,
.pm = TSL2550_PM_OPS,
},
.probe = tsl2550_probe,

166
drivers/misc/vmw_balloon.c
View File

@ -46,7 +46,7 @@
MODULE_AUTHOR("VMware, Inc.");
MODULE_DESCRIPTION("VMware Memory Control (Balloon) Driver");
MODULE_VERSION("1.2.1.3-k");
MODULE_VERSION("1.3.0.0-k");
MODULE_ALIAS("dmi:*:svnVMware*:*");
MODULE_ALIAS("vmware_vmmemctl");
MODULE_LICENSE("GPL");
@ -110,9 +110,18 @@ MODULE_LICENSE("GPL");
*/
#define VMW_BALLOON_HV_PORT 0x5670
#define VMW_BALLOON_HV_MAGIC 0x456c6d6f
#define VMW_BALLOON_PROTOCOL_VERSION 2
#define VMW_BALLOON_GUEST_ID 1 /* Linux */
enum vmwballoon_capabilities {
/*
* Bit 0 is reserved and not associated to any capability.
*/
VMW_BALLOON_BASIC_CMDS = (1 << 1),
VMW_BALLOON_BATCHED_CMDS = (1 << 2)
};
#define VMW_BALLOON_CAPABILITIES (VMW_BALLOON_BASIC_CMDS)
#define VMW_BALLOON_CMD_START 0
#define VMW_BALLOON_CMD_GET_TARGET 1
#define VMW_BALLOON_CMD_LOCK 2
@ -120,32 +129,36 @@ MODULE_LICENSE("GPL");
#define VMW_BALLOON_CMD_GUEST_ID 4
/* error codes */
#define VMW_BALLOON_SUCCESS 0
#define VMW_BALLOON_FAILURE -1
#define VMW_BALLOON_ERROR_CMD_INVALID 1
#define VMW_BALLOON_ERROR_PPN_INVALID 2
#define VMW_BALLOON_ERROR_PPN_LOCKED 3
#define VMW_BALLOON_ERROR_PPN_UNLOCKED 4
#define VMW_BALLOON_ERROR_PPN_PINNED 5
#define VMW_BALLOON_ERROR_PPN_NOTNEEDED 6
#define VMW_BALLOON_ERROR_RESET 7
#define VMW_BALLOON_ERROR_BUSY 8
#define VMW_BALLOON_SUCCESS 0
#define VMW_BALLOON_FAILURE -1
#define VMW_BALLOON_ERROR_CMD_INVALID 1
#define VMW_BALLOON_ERROR_PPN_INVALID 2
#define VMW_BALLOON_ERROR_PPN_LOCKED 3
#define VMW_BALLOON_ERROR_PPN_UNLOCKED 4
#define VMW_BALLOON_ERROR_PPN_PINNED 5
#define VMW_BALLOON_ERROR_PPN_NOTNEEDED 6
#define VMW_BALLOON_ERROR_RESET 7
#define VMW_BALLOON_ERROR_BUSY 8
#define VMWARE_BALLOON_CMD(cmd, data, result) \
({ \
unsigned long __stat, __dummy1, __dummy2; \
__asm__ __volatile__ ("inl %%dx" : \
"=a"(__stat), \
"=c"(__dummy1), \
"=d"(__dummy2), \
"=b"(result) : \
"0"(VMW_BALLOON_HV_MAGIC), \
"1"(VMW_BALLOON_CMD_##cmd), \
"2"(VMW_BALLOON_HV_PORT), \
"3"(data) : \
"memory"); \
result &= -1UL; \
__stat & -1UL; \
#define VMW_BALLOON_SUCCESS_WITH_CAPABILITIES (0x03000000)
#define VMWARE_BALLOON_CMD(cmd, data, result) \
({ \
unsigned long __status, __dummy1, __dummy2; \
__asm__ __volatile__ ("inl %%dx" : \
"=a"(__status), \
"=c"(__dummy1), \
"=d"(__dummy2), \
"=b"(result) : \
"0"(VMW_BALLOON_HV_MAGIC), \
"1"(VMW_BALLOON_CMD_##cmd), \
"2"(VMW_BALLOON_HV_PORT), \
"3"(data) : \
"memory"); \
if (VMW_BALLOON_CMD_##cmd == VMW_BALLOON_CMD_START) \
result = __dummy1; \
result &= -1UL; \
__status & -1UL; \
})
#ifdef CONFIG_DEBUG_FS
@ -223,11 +236,12 @@ static struct vmballoon balloon;
*/
static bool vmballoon_send_start(struct vmballoon *b)
{
unsigned long status, dummy;
unsigned long status, capabilities;
STATS_INC(b->stats.start);
status = VMWARE_BALLOON_CMD(START, VMW_BALLOON_PROTOCOL_VERSION, dummy);
status = VMWARE_BALLOON_CMD(START, VMW_BALLOON_CAPABILITIES,
capabilities);
if (status == VMW_BALLOON_SUCCESS)
return true;
@ -402,55 +416,37 @@ static void vmballoon_reset(struct vmballoon *b)
}
/*
* Allocate (or reserve) a page for the balloon and notify the host. If host
* refuses the page put it on "refuse" list and allocate another one until host
* is satisfied. "Refused" pages are released at the end of inflation cycle
* (when we allocate b->rate_alloc pages).
* Notify the host of a ballooned page. If host rejects the page put it on the
* refuse list, those refused page are then released at the end of the
* inflation cycle.
*/
static int vmballoon_reserve_page(struct vmballoon *b, bool can_sleep)
static int vmballoon_lock_page(struct vmballoon *b, struct page *page)
{
struct page *page;
gfp_t flags;
unsigned int hv_status;
int locked;
flags = can_sleep ? VMW_PAGE_ALLOC_CANSLEEP : VMW_PAGE_ALLOC_NOSLEEP;
int locked, hv_status;
do {
if (!can_sleep)
STATS_INC(b->stats.alloc);
else
STATS_INC(b->stats.sleep_alloc);
locked = vmballoon_send_lock_page(b, page_to_pfn(page), &hv_status);
if (locked > 0) {
STATS_INC(b->stats.refused_alloc);
page = alloc_page(flags);
if (!page) {
if (!can_sleep)
STATS_INC(b->stats.alloc_fail);
else
STATS_INC(b->stats.sleep_alloc_fail);
return -ENOMEM;
if (hv_status == VMW_BALLOON_ERROR_RESET ||
hv_status == VMW_BALLOON_ERROR_PPN_NOTNEEDED) {
__free_page(page);
return -EIO;
}
/* inform monitor */
locked = vmballoon_send_lock_page(b, page_to_pfn(page), &hv_status);
if (locked > 0) {
STATS_INC(b->stats.refused_alloc);
if (hv_status == VMW_BALLOON_ERROR_RESET ||
hv_status == VMW_BALLOON_ERROR_PPN_NOTNEEDED) {
__free_page(page);
return -EIO;
}
/*
* Place page on the list of non-balloonable pages
* and retry allocation, unless we already accumulated
* too many of them, in which case take a breather.
*/
/*
* Place page on the list of non-balloonable pages
* and retry allocation, unless we already accumulated
* too many of them, in which case take a breather.
*/
if (b->n_refused_pages < VMW_BALLOON_MAX_REFUSED) {
b->n_refused_pages++;
list_add(&page->lru, &b->refused_pages);
if (++b->n_refused_pages >= VMW_BALLOON_MAX_REFUSED)
return -EIO;
} else {
__free_page(page);
}
} while (locked != 0);
return -EIO;
}
/* track allocated page */
list_add(&page->lru, &b->pages);
@ -512,7 +508,7 @@ static void vmballoon_inflate(struct vmballoon *b)
unsigned int i;
unsigned int allocations = 0;
int error = 0;
bool alloc_can_sleep = false;
gfp_t flags = VMW_PAGE_ALLOC_NOSLEEP;
pr_debug("%s - size: %d, target %d\n", __func__, b->size, b->target);
@ -543,19 +539,16 @@ static void vmballoon_inflate(struct vmballoon *b)
__func__, goal, rate, b->rate_alloc);
for (i = 0; i < goal; i++) {
struct page *page;
error = vmballoon_reserve_page(b, alloc_can_sleep);
if (error) {
if (error != -ENOMEM) {
/*
* Not a page allocation failure, stop this
* cycle. Maybe we'll get new target from
* the host soon.
*/
break;
}
if (flags == VMW_PAGE_ALLOC_NOSLEEP)
STATS_INC(b->stats.alloc);
else
STATS_INC(b->stats.sleep_alloc);
if (alloc_can_sleep) {
page = alloc_page(flags);
if (!page) {
if (flags == VMW_PAGE_ALLOC_CANSLEEP) {
/*
* CANSLEEP page allocation failed, so guest
* is under severe memory pressure. Quickly
@ -563,8 +556,10 @@ static void vmballoon_inflate(struct vmballoon *b)
*/
b->rate_alloc = max(b->rate_alloc / 2,
VMW_BALLOON_RATE_ALLOC_MIN);
STATS_INC(b->stats.sleep_alloc_fail);
break;
}
STATS_INC(b->stats.alloc_fail);
/*
* NOSLEEP page allocation failed, so the guest is
@ -579,11 +574,16 @@ static void vmballoon_inflate(struct vmballoon *b)
if (i >= b->rate_alloc)
break;
alloc_can_sleep = true;
flags = VMW_PAGE_ALLOC_CANSLEEP;
/* Lower rate for sleeping allocations. */
rate = b->rate_alloc;
continue;
}
error = vmballoon_lock_page(b, page);
if (error)
break;
if (++allocations > VMW_BALLOON_YIELD_THRESHOLD) {
cond_resched();
allocations = 0;

7
drivers/misc/vmw_vmci/vmci_host.c
View File

@ -1031,14 +1031,9 @@ int __init vmci_host_init(void)
void __exit vmci_host_exit(void)
{
int error;
vmci_host_device_initialized = false;
error = misc_deregister(&vmci_host_miscdev);
if (error)
pr_warn("Error unregistering character device: %d\n", error);
misc_deregister(&vmci_host_miscdev);
vmci_ctx_destroy(host_context);
vmci_qp_broker_exit();

3
drivers/nfc/mei_phy.c
View File

@ -355,7 +355,8 @@ static int nfc_mei_phy_enable(void *phy_id)
goto err;
}
r = mei_cl_register_event_cb(phy->device, nfc_mei_event_cb, phy);
r = mei_cl_register_event_cb(phy->device, BIT(MEI_CL_EVENT_RX),
nfc_mei_event_cb, phy);
if (r) {
pr_err("Event cb registration failed %d\n", r);
goto err;

39
drivers/nvmem/Kconfig Normal file
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@ -0,0 +1,39 @@
menuconfig NVMEM
tristate "NVMEM Support"
select REGMAP
help
Support for NVMEM(Non Volatile Memory) devices like EEPROM, EFUSES...
This framework is designed to provide a generic interface to NVMEM
from both the Linux Kernel and the userspace.
This driver can also be built as a module. If so, the module
will be called nvmem_core.
If unsure, say no.
if NVMEM
config QCOM_QFPROM
tristate "QCOM QFPROM Support"
depends on ARCH_QCOM || COMPILE_TEST
select REGMAP_MMIO
help
Say y here to enable QFPROM support. The QFPROM provides access
functions for QFPROM data to rest of the drivers via nvmem interface.
This driver can also be built as a module. If so, the module
will be called nvmem_qfprom.
config NVMEM_SUNXI_SID
tristate "Allwinner SoCs SID support"
depends on ARCH_SUNXI
select REGMAP_MMIO
help
This is a driver for the 'security ID' available on various Allwinner
devices.
This driver can also be built as a module. If so, the module
will be called nvmem_sunxi_sid.
endif

12
drivers/nvmem/Makefile Normal file
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@ -0,0 +1,12 @@
#
# Makefile for nvmem drivers.
#
obj-$(CONFIG_NVMEM) += nvmem_core.o
nvmem_core-y := core.o
# Devices
obj-$(CONFIG_QCOM_QFPROM) += nvmem_qfprom.o
nvmem_qfprom-y := qfprom.o
obj-$(CONFIG_NVMEM_SUNXI_SID) += nvmem_sunxi_sid.o
nvmem_sunxi_sid-y := sunxi_sid.o

1083
drivers/nvmem/core.c Normal file
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File diff suppressed because it is too large Load Diff

85
drivers/nvmem/qfprom.c Normal file
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@ -0,0 +1,85 @@
/*
* Copyright (C) 2015 Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <linux/device.h>
#include <linux/module.h>
#include <linux/nvmem-provider.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
static struct regmap_config qfprom_regmap_config = {
.reg_bits = 32,
.val_bits = 8,
.reg_stride = 1,
};
static struct nvmem_config econfig = {
.name = "qfprom",
.owner = THIS_MODULE,
};
static int qfprom_remove(struct platform_device *pdev)
{
struct nvmem_device *nvmem = platform_get_drvdata(pdev);
return nvmem_unregister(nvmem);
}
static int qfprom_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct resource *res;
struct nvmem_device *nvmem;
struct regmap *regmap;
void __iomem *base;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
base = devm_ioremap_resource(dev, res);
if (IS_ERR(base))
return PTR_ERR(base);
qfprom_regmap_config.max_register = resource_size(res) - 1;
regmap = devm_regmap_init_mmio(dev, base, &qfprom_regmap_config);
if (IS_ERR(regmap)) {
dev_err(dev, "regmap init failed\n");
return PTR_ERR(regmap);
}
econfig.dev = dev;
nvmem = nvmem_register(&econfig);
if (IS_ERR(nvmem))
return PTR_ERR(nvmem);
platform_set_drvdata(pdev, nvmem);
return 0;
}
static const struct of_device_id qfprom_of_match[] = {
{ .compatible = "qcom,qfprom",},
{/* sentinel */},
};
MODULE_DEVICE_TABLE(of, qfprom_of_match);
static struct platform_driver qfprom_driver = {
.probe = qfprom_probe,
.remove = qfprom_remove,
.driver = {
.name = "qcom,qfprom",
.of_match_table = qfprom_of_match,
},
};
module_platform_driver(qfprom_driver);
MODULE_AUTHOR("Srinivas Kandagatla <srinivas.kandagatla@linaro.org>");
MODULE_DESCRIPTION("Qualcomm QFPROM driver");
MODULE_LICENSE("GPL v2");

171
drivers/nvmem/sunxi_sid.c Normal file
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@ -0,0 +1,171 @@
/*
* Allwinner sunXi SoCs Security ID support.
*
* Copyright (c) 2013 Oliver Schinagl <oliver@schinagl.nl>
* Copyright (C) 2014 Maxime Ripard <maxime.ripard@free-electrons.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*/
#include <linux/device.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/nvmem-provider.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <linux/slab.h>
#include <linux/random.h>
static struct nvmem_config econfig = {
.name = "sunxi-sid",
.read_only = true,
.owner = THIS_MODULE,
};
struct sunxi_sid {
void __iomem *base;
};
/* We read the entire key, due to a 32 bit read alignment requirement. Since we
* want to return the requested byte, this results in somewhat slower code and
* uses 4 times more reads as needed but keeps code simpler. Since the SID is
* only very rarely probed, this is not really an issue.
*/
static u8 sunxi_sid_read_byte(const struct sunxi_sid *sid,
const unsigned int offset)
{
u32 sid_key;
sid_key = ioread32be(sid->base + round_down(offset, 4));
sid_key >>= (offset % 4) * 8;
return sid_key; /* Only return the last byte */
}
static int sunxi_sid_read(void *context,
const void *reg, size_t reg_size,
void *val, size_t val_size)
{
struct sunxi_sid *sid = context;
unsigned int offset = *(u32 *)reg;
u8 *buf = val;
while (val_size) {
*buf++ = sunxi_sid_read_byte(sid, offset);
val_size--;
offset++;
}
return 0;
}
static int sunxi_sid_write(void *context, const void *data, size_t count)
{
/* Unimplemented, dummy to keep regmap core happy */
return 0;
}
static struct regmap_bus sunxi_sid_bus = {
.read = sunxi_sid_read,
.write = sunxi_sid_write,
.reg_format_endian_default = REGMAP_ENDIAN_NATIVE,
.val_format_endian_default = REGMAP_ENDIAN_NATIVE,
};
static bool sunxi_sid_writeable_reg(struct device *dev, unsigned int reg)
{
return false;
}
static struct regmap_config sunxi_sid_regmap_config = {
.reg_bits = 32,
.val_bits = 8,
.reg_stride = 1,
.writeable_reg = sunxi_sid_writeable_reg,
};
static int sunxi_sid_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct resource *res;
struct nvmem_device *nvmem;
struct regmap *regmap;
struct sunxi_sid *sid;
int i, size;
char *randomness;
sid = devm_kzalloc(dev, sizeof(*sid), GFP_KERNEL);
if (!sid)
return -ENOMEM;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
sid->base = devm_ioremap_resource(dev, res);
if (IS_ERR(sid->base))
return PTR_ERR(sid->base);
size = resource_size(res) - 1;
sunxi_sid_regmap_config.max_register = size;
regmap = devm_regmap_init(dev, &sunxi_sid_bus, sid,
&sunxi_sid_regmap_config);
if (IS_ERR(regmap)) {
dev_err(dev, "regmap init failed\n");
return PTR_ERR(regmap);
}
econfig.dev = dev;
nvmem = nvmem_register(&econfig);
if (IS_ERR(nvmem))
return PTR_ERR(nvmem);
randomness = kzalloc(sizeof(u8) * size, GFP_KERNEL);
for (i = 0; i < size; i++)
randomness[i] = sunxi_sid_read_byte(sid, i);
add_device_randomness(randomness, size);
kfree(randomness);
platform_set_drvdata(pdev, nvmem);
return 0;
}
static int sunxi_sid_remove(struct platform_device *pdev)
{
struct nvmem_device *nvmem = platform_get_drvdata(pdev);
return nvmem_unregister(nvmem);
}
static const struct of_device_id sunxi_sid_of_match[] = {
{ .compatible = "allwinner,sun4i-a10-sid" },
{ .compatible = "allwinner,sun7i-a20-sid" },
{/* sentinel */},
};
MODULE_DEVICE_TABLE(of, sunxi_sid_of_match);
static struct platform_driver sunxi_sid_driver = {
.probe = sunxi_sid_probe,
.remove = sunxi_sid_remove,
.driver = {
.name = "eeprom-sunxi-sid",
.of_match_table = sunxi_sid_of_match,
},
};
module_platform_driver(sunxi_sid_driver);
MODULE_AUTHOR("Oliver Schinagl <oliver@schinagl.nl>");
MODULE_DESCRIPTION("Allwinner sunxi security id driver");
MODULE_LICENSE("GPL");

5
drivers/rtc/rtc-ds1374.c
View File

@ -666,9 +666,8 @@ static int ds1374_remove(struct i2c_client *client)
#ifdef CONFIG_RTC_DRV_DS1374_WDT
int res;
res = misc_deregister(&ds1374_miscdev);
if (!res)
ds1374_miscdev.parent = NULL;
misc_deregister(&ds1374_miscdev);
ds1374_miscdev.parent = NULL;
unregister_reboot_notifier(&ds1374_wdt_notifier);
#endif

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