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TTY/Serial patches for 4.13-rc1

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Here is the large tty/serial patchset for 4.13-rc1.
 
 A lot of tty and serial driver updates are in here, along with some
 fixups for some __get/put_user usages that were reported.  Nothing huge,
 just lots of development by a number of different developers, full
 details in the shortlog.
 
 All of these have been in linux-next for a while.  There will be a merge
 issue with the arm-soc tree in the include/linux/platform_data/atmel.h
 file.  Stephen has sent out a fixup for it, so it shouldn't be that
 difficult to merge.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'tty-4.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty

Pull tty/serial updates from Greg KH:
 "Here is the large tty/serial patchset for 4.13-rc1.

  A lot of tty and serial driver updates are in here, along with some
  fixups for some __get/put_user usages that were reported. Nothing
  huge, just lots of development by a number of different developers,
  full details in the shortlog.

  All of these have been in linux-next for a while"

* tag 'tty-4.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (71 commits)
  tty: serial: lpuart: add a more accurate baud rate calculation method
  tty: serial: lpuart: add earlycon support for imx7ulp
  tty: serial: lpuart: add imx7ulp support
  dt-bindings: serial: fsl-lpuart: add i.MX7ULP support
  tty: serial: lpuart: add little endian 32 bit register support
  tty: serial: lpuart: refactor lpuart32_{read|write} prototype
  tty: serial: lpuart: introduce lpuart_soc_data to represent SoC property
  serial: imx-serial - move DMA buffer configuration to DT
  serial: imx: Enable RTSD only when needed
  serial: imx: Remove unused members from imx_port struct
  serial: 8250: 8250_omap: Fix race b/w dma completion and RX timeout
  serial: 8250: Fix THRE flag usage for CAP_MINI
  tty/serial: meson_uart: update to stable bindings
  dt-bindings: serial: Add bindings for the Amlogic Meson UARTs
  serial: Delete dead code for CIR serial ports
  serial: sirf: make of_device_ids const
  serial/mpsc: switch to dma_alloc_attrs
  tty: serial: Add Actions Semi Owl UART earlycon
  dt-bindings: serial: Document Actions Semi Owl UARTs
  tty/serial: atmel: make the driver DT only
  ...
This commit is contained in:
Linus Torvalds 2017-07-03 20:04:16 -07:00
commit 9a715cd543
66 changed files with 1406 additions and 713 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
Documentation/ABI/stable/sysfs-driver-aspeed-vuart Normal file
View File

@ -0,0 +1,15 @@
What: /sys/bus/platform/drivers/aspeed-vuart/*/lpc_address
Date: April 2017
Contact: Jeremy Kerr <jk@ozlabs.org>
Description: Configures which IO port the host side of the UART
will appear on the host <-> BMC LPC bus.
Users: OpenBMC. Proposed changes should be mailed to
openbmc@lists.ozlabs.org
What: /sys/bus/platform/drivers/aspeed-vuart*/sirq
Date: April 2017
Contact: Jeremy Kerr <jk@ozlabs.org>
Description: Configures which interrupt number the host side of
the UART will appear on the host <-> BMC LPC bus.
Users: OpenBMC. Proposed changes should be mailed to
openbmc@lists.ozlabs.org

6
Documentation/admin-guide/kernel-parameters.txt
View File

@ -954,6 +954,12 @@
must already be setup and configured. Options are not
yet supported.
owl,<addr>
Start an early, polled-mode console on a serial port
of an Actions Semi SoC, such as S500 or S900, at the
specified address. The serial port must already be
setup and configured. Options are not yet supported.
smh Use ARM semihosting calls for early console.
s3c2410,<addr>

3
Documentation/devicetree/bindings/serial/8250.txt
View File

@ -20,6 +20,8 @@ Required properties:
- "fsl,16550-FIFO64"
- "fsl,ns16550"
- "ti,da830-uart"
- "aspeed,ast2400-vuart"
- "aspeed,ast2500-vuart"
- "serial" if the port type is unknown.
- reg : offset and length of the register set for the device.
- interrupts : should contain uart interrupt.
@ -45,6 +47,7 @@ Optional properties:
property.
- tx-threshold: Specify the TX FIFO low water indication for parts with
programmable TX FIFO thresholds.
- resets : phandle + reset specifier pairs
Note:
* fsl,ns16550:

16
Documentation/devicetree/bindings/serial/actions,owl-uart.txt Normal file
View File

@ -0,0 +1,16 @@
Actions Semi Owl UART
Required properties:
- compatible : "actions,s500-uart", "actions,owl-uart" for S500
"actions,s900-uart", "actions,owl-uart" for S900
- reg : Offset and length of the register set for the device.
- interrupts : Should contain UART interrupt.
Example:
uart3: serial@b0126000 {
compatible = "actions,s500-uart", "actions,owl-uart";
reg = <0xb0126000 0x1000>;
interrupts = <GIC_SPI 32 IRQ_TYPE_LEVEL_HIGH>;
};

38
Documentation/devicetree/bindings/serial/amlogic,meson-uart.txt Normal file
View File

@ -0,0 +1,38 @@
Amlogic Meson SoC UART Serial Interface
=======================================
The Amlogic Meson SoC UART Serial Interface is present on a large range
of SoCs, and can be present either in the "Always-On" power domain or the
"Everything-Else" power domain.
The particularity of the "Always-On" Serial Interface is that the hardware
is active since power-on and does not need any clock gating and is usable
as very early serial console.
Required properties:
- compatible : compatible: value should be different for each SoC family as :
- Meson6 : "amlogic,meson6-uart"
- Meson8 : "amlogic,meson8-uart"
- Meson8b : "amlogic,meson8b-uart"
- GX (GXBB, GXL, GXM) : "amlogic,meson-gx-uart"
eventually followed by : "amlogic,meson-ao-uart" if this UART interface
is in the "Always-On" power domain.
- reg : offset and length of the register set for the device.
- interrupts : identifier to the device interrupt
- clocks : a list of phandle + clock-specifier pairs, one for each
entry in clock names.
- clocks-names :
* "xtal" for external xtal clock identifier
* "pclk" for the bus core clock, either the clk81 clock or the gate clock
* "baud" for the source of the baudrate generator, can be either the xtal
or the pclk.
e.g.
uart_A: serial@84c0 {
compatible = "amlogic,meson-gx-uart";
reg = <0x0 0x84c0 0x0 0x14>;
interrupts = <GIC_SPI 26 IRQ_TYPE_EDGE_RISING>;
/* Use xtal as baud rate clock source */
clocks = <&xtal>, <&clkc CLKID_UART0>, <&xtal>;
clock-names = "xtal", "pclk", "baud";
};

2
Documentation/devicetree/bindings/serial/fsl-imx-uart.txt
View File

@ -9,6 +9,7 @@ Optional properties:
- fsl,irda-mode : Indicate the uart supports irda mode
- fsl,dte-mode : Indicate the uart works in DTE mode. The uart works
in DCE mode by default.
- fsl,dma-size : Indicate the size of the DMA buffer and its periods
Please check Documentation/devicetree/bindings/serial/serial.txt
for the complete list of generic properties.
@ -28,4 +29,5 @@ uart1: serial@73fbc000 {
interrupts = <31>;
uart-has-rtscts;
fsl,dte-mode;
fsl,dma-size = <1024 4>;
};

2
Documentation/devicetree/bindings/serial/fsl-lpuart.txt
View File

@ -6,6 +6,8 @@ Required properties:
on Vybrid vf610 SoC with 8-bit register organization
- "fsl,ls1021a-lpuart" for lpuart compatible with the one integrated
on LS1021A SoC with 32-bit big-endian register organization
- "fsl,imx7ulp-lpuart" for lpuart compatible with the one integrated
on i.MX7ULP SoC with 32-bit little-endian register organization
- reg : Address and length of the register set for the device
- interrupts : Should contain uart interrupt
- clocks : phandle + clock specifier pairs, one for each entry in clock-names

7
Documentation/serial/n_gsm.txt
View File

@ -77,6 +77,13 @@ for example, it's possible :
6- first close all virtual ports before closing the physical port.
Note that after closing the physical port the modem is still in multiplexing
mode. This may prevent a successful re-opening of the port later. To avoid
this situation either reset the modem if your hardware allows that or send
a disconnect command frame manually before initializing the multiplexing mode
for the second time. The byte sequence for the disconnect command frame is:
0xf9, 0x03, 0xef, 0x03, 0xc3, 0x16, 0xf9.
Additional Documentation
------------------------
More practical details on the protocol and how it's supported by industrial

2
MAINTAINERS
View File

@ -8446,7 +8446,7 @@ T: git git://git.monstr.eu/linux-2.6-microblaze.git
S: Supported
F: arch/microblaze/
MICROCHIP / ATMEL AT91 / AT32 SERIAL DRIVER
MICROCHIP / ATMEL AT91 SERIAL DRIVER
M: Richard Genoud <richard.genoud@gmail.com>
S: Maintained
F: drivers/tty/serial/atmel_serial.c

1
arch/alpha/include/uapi/asm/ioctls.h
View File

@ -100,6 +100,7 @@
#define TIOCGPKT _IOR('T', 0x38, int) /* Get packet mode state */
#define TIOCGPTLCK _IOR('T', 0x39, int) /* Get Pty lock state */
#define TIOCGEXCL _IOR('T', 0x40, int) /* Get exclusive mode state */
#define TIOCGPTPEER _IOR('T', 0x41, int) /* Safely open the slave */
#define TIOCSERCONFIG 0x5453
#define TIOCSERGWILD 0x5454

13
arch/ia64/hp/sim/simserial.c
View File

@ -387,19 +387,6 @@ static int activate(struct tty_port *port, struct tty_struct *tty)
}
state->xmit.head = state->xmit.tail = 0;
/*
* Set up the tty->alt_speed kludge
*/
if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
tty->alt_speed = 57600;
if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
tty->alt_speed = 115200;
if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
tty->alt_speed = 230400;
if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
tty->alt_speed = 460800;
errout:
local_irq_restore(flags);
return retval;

1
arch/mips/include/uapi/asm/ioctls.h
View File

@ -91,6 +91,7 @@
#define TIOCGPKT _IOR('T', 0x38, int) /* Get packet mode state */
#define TIOCGPTLCK _IOR('T', 0x39, int) /* Get Pty lock state */
#define TIOCGEXCL _IOR('T', 0x40, int) /* Get exclusive mode state */
#define TIOCGPTPEER _IOR('T', 0x41, int) /* Safely open the slave */
/* I hope the range from 0x5480 on is free ... */
#define TIOCSCTTY 0x5480 /* become controlling tty */

1
arch/parisc/include/uapi/asm/ioctls.h
View File

@ -60,6 +60,7 @@
#define TIOCGPKT _IOR('T', 0x38, int) /* Get packet mode state */
#define TIOCGPTLCK _IOR('T', 0x39, int) /* Get Pty lock state */
#define TIOCGEXCL _IOR('T', 0x40, int) /* Get exclusive mode state */
#define TIOCGPTPEER _IOR('T', 0x41, int) /* Safely open the slave */
#define FIONCLEX 0x5450 /* these numbers need to be adjusted. */
#define FIOCLEX 0x5451

1
arch/powerpc/include/uapi/asm/ioctls.h
View File

@ -100,6 +100,7 @@
#define TIOCGPKT _IOR('T', 0x38, int) /* Get packet mode state */
#define TIOCGPTLCK _IOR('T', 0x39, int) /* Get Pty lock state */
#define TIOCGEXCL _IOR('T', 0x40, int) /* Get exclusive mode state */
#define TIOCGPTPEER _IOR('T', 0x41, int) /* Safely open the slave */
#define TIOCSERCONFIG 0x5453
#define TIOCSERGWILD 0x5454

1
arch/sh/include/uapi/asm/ioctls.h
View File

@ -93,6 +93,7 @@
#define TIOCGPKT _IOR('T', 0x38, int) /* Get packet mode state */
#define TIOCGPTLCK _IOR('T', 0x39, int) /* Get Pty lock state */
#define TIOCGEXCL _IOR('T', 0x40, int) /* Get exclusive mode state */
#define TIOCGPTPEER _IOR('T', 0x41, int) /* Safely open the slave */
#define TIOCSERCONFIG _IO('T', 83) /* 0x5453 */
#define TIOCSERGWILD _IOR('T', 84, int) /* 0x5454 */

3
arch/sparc/include/uapi/asm/ioctls.h
View File

@ -27,7 +27,7 @@
#define TIOCGRS485 _IOR('T', 0x41, struct serial_rs485)
#define TIOCSRS485 _IOWR('T', 0x42, struct serial_rs485)
/* Note that all the ioctls that are not available in Linux have a
/* Note that all the ioctls that are not available in Linux have a
* double underscore on the front to: a) avoid some programs to
* think we support some ioctls under Linux (autoconfiguration stuff)
*/
@ -88,6 +88,7 @@
#define TIOCGPTN _IOR('t', 134, unsigned int) /* Get Pty Number */
#define TIOCSPTLCK _IOW('t', 135, int) /* Lock/unlock PTY */
#define TIOCSIG _IOW('t', 136, int) /* Generate signal on Pty slave */
#define TIOCGPTPEER _IOR('t', 137, int) /* Safely open the slave */
/* Little f */
#define FIOCLEX _IO('f', 1)

1
arch/xtensa/include/uapi/asm/ioctls.h
View File

@ -105,6 +105,7 @@
#define TIOCGPKT _IOR('T', 0x38, int) /* Get packet mode state */
#define TIOCGPTLCK _IOR('T', 0x39, int) /* Get Pty lock state */
#define TIOCGEXCL _IOR('T', 0x40, int) /* Get exclusive mode state */
#define TIOCGPTPEER _IOR('T', 0x41, int) /* Safely open the slave */
#define TIOCSERCONFIG _IO('T', 83)
#define TIOCSERGWILD _IOR('T', 84, int)

3
drivers/tty/Makefile
View File

@ -1,6 +1,7 @@
obj-$(CONFIG_TTY) += tty_io.o n_tty.o tty_ioctl.o tty_ldisc.o \
tty_buffer.o tty_port.o tty_mutex.o \
tty_ldsem.o tty_baudrate.o tty_jobctrl.o
tty_ldsem.o tty_baudrate.o tty_jobctrl.o \
n_null.o
obj-$(CONFIG_LEGACY_PTYS) += pty.o
obj-$(CONFIG_UNIX98_PTYS) += pty.o
obj-$(CONFIG_AUDIT) += tty_audit.o

23
drivers/tty/amiserial.c
View File

@ -569,18 +569,6 @@ static int startup(struct tty_struct *tty, struct serial_state *info)
clear_bit(TTY_IO_ERROR, &tty->flags);
info->xmit.head = info->xmit.tail = 0;
/*
* Set up the tty->alt_speed kludge
*/
if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
tty->alt_speed = 57600;
if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
tty->alt_speed = 115200;
if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
tty->alt_speed = 230400;
if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
tty->alt_speed = 460800;
/*
* and set the speed of the serial port
*/
@ -1084,14 +1072,9 @@ static int set_serial_info(struct tty_struct *tty, struct serial_state *state,
check_and_exit:
if (tty_port_initialized(port)) {
if (change_spd) {
if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
tty->alt_speed = 57600;
if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
tty->alt_speed = 115200;
if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
tty->alt_speed = 230400;
if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
tty->alt_speed = 460800;
/* warn about deprecation unless clearing */
if (new_serial.flags & ASYNC_SPD_MASK)
dev_warn_ratelimited(tty->dev, "use of SPD flags is deprecated\n");
change_speed(tty, state, NULL);
}
} else

21
drivers/tty/cyclades.c
View File

@ -1975,18 +1975,6 @@ static void cy_set_line_char(struct cyclades_port *info, struct tty_struct *tty)
cflag = tty->termios.c_cflag;
iflag = tty->termios.c_iflag;
/*
* Set up the tty->alt_speed kludge
*/
if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
tty->alt_speed = 57600;
if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
tty->alt_speed = 115200;
if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
tty->alt_speed = 230400;
if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
tty->alt_speed = 460800;
card = info->card;
channel = info->line - card->first_line;
@ -2295,12 +2283,16 @@ cy_set_serial_info(struct cyclades_port *info, struct tty_struct *tty,
struct serial_struct __user *new_info)
{
struct serial_struct new_serial;
int old_flags;
int ret;
if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
return -EFAULT;
mutex_lock(&info->port.mutex);
old_flags = info->port.flags;
if (!capable(CAP_SYS_ADMIN)) {
if (new_serial.close_delay != info->port.close_delay ||
new_serial.baud_base != info->baud ||
@ -2332,6 +2324,11 @@ cy_set_serial_info(struct cyclades_port *info, struct tty_struct *tty,
check_and_exit:
if (tty_port_initialized(&info->port)) {
if ((new_serial.flags ^ old_flags) & ASYNC_SPD_MASK) {
/* warn about deprecation unless clearing */
if (new_serial.flags & ASYNC_SPD_MASK)
dev_warn_ratelimited(tty->dev, "use of SPD flags is deprecated\n");
}
cy_set_line_char(info, tty);
ret = 0;
} else {

3
drivers/tty/hvc/hvcs.c
View File

@ -1242,8 +1242,7 @@ static void hvcs_close(struct tty_struct *tty, struct file *filp)
free_irq(irq, hvcsd);
return;
} else if (hvcsd->port.count < 0) {
printk(KERN_ERR "HVCS: vty-server@%X open_count: %d"
" is missmanaged.\n",
printk(KERN_ERR "HVCS: vty-server@%X open_count: %d is mismanaged.\n",
hvcsd->vdev->unit_address, hvcsd->port.count);
}

54
drivers/tty/n_gsm.c
View File

@ -2015,6 +2015,33 @@ static void gsm_error(struct gsm_mux *gsm,
gsm->io_error++;
}
static int gsm_disconnect(struct gsm_mux *gsm)
{
struct gsm_dlci *dlci = gsm->dlci[0];
struct gsm_control *gc;
if (!dlci)
return 0;
/* In theory disconnecting DLCI 0 is sufficient but for some
modems this is apparently not the case. */
gc = gsm_control_send(gsm, CMD_CLD, NULL, 0);
if (gc)
gsm_control_wait(gsm, gc);
del_timer_sync(&gsm->t2_timer);
/* Now we are sure T2 has stopped */
gsm_dlci_begin_close(dlci);
wait_event_interruptible(gsm->event,
dlci->state == DLCI_CLOSED);
if (signal_pending(current))
return -EINTR;
return 0;
}
/**
* gsm_cleanup_mux - generic GSM protocol cleanup
* @gsm: our mux
@ -2029,7 +2056,6 @@ static void gsm_cleanup_mux(struct gsm_mux *gsm)
int i;
struct gsm_dlci *dlci = gsm->dlci[0];
struct gsm_msg *txq, *ntxq;
struct gsm_control *gc;
gsm->dead = 1;
@ -2045,21 +2071,11 @@ static void gsm_cleanup_mux(struct gsm_mux *gsm)
if (i == MAX_MUX)
return;
/* In theory disconnecting DLCI 0 is sufficient but for some
modems this is apparently not the case. */
if (dlci) {
gc = gsm_control_send(gsm, CMD_CLD, NULL, 0);
if (gc)
gsm_control_wait(gsm, gc);
}
del_timer_sync(&gsm->t2_timer);
/* Now we are sure T2 has stopped */
if (dlci) {
if (dlci)
dlci->dead = 1;
gsm_dlci_begin_close(dlci);
wait_event_interruptible(gsm->event,
dlci->state == DLCI_CLOSED);
}
/* Free up any link layer users */
mutex_lock(&gsm->mutex);
for (i = 0; i < NUM_DLCI; i++)
@ -2519,12 +2535,12 @@ static int gsmld_config(struct tty_struct *tty, struct gsm_mux *gsm,
*/
if (need_close || need_restart) {
gsm_dlci_begin_close(gsm->dlci[0]);
/* This will timeout if the link is down due to N2 expiring */
wait_event_interruptible(gsm->event,
gsm->dlci[0]->state == DLCI_CLOSED);
if (signal_pending(current))
return -EINTR;
int ret;
ret = gsm_disconnect(gsm);
if (ret)
return ret;
}
if (need_restart)
gsm_cleanup_mux(gsm);

80
drivers/tty/n_null.c Normal file
View File

@ -0,0 +1,80 @@
#include <linux/types.h>
#include <linux/errno.h>
#include <linux/tty.h>
#include <linux/module.h>
/*
* n_null.c - Null line discipline used in the failure path
*
* Copyright (C) Intel 2017
*
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License 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.
*
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
*/
static int n_null_open(struct tty_struct *tty)
{
return 0;
}
static void n_null_close(struct tty_struct *tty)
{
}
static ssize_t n_null_read(struct tty_struct *tty, struct file *file,
unsigned char __user * buf, size_t nr)
{
return -EOPNOTSUPP;
}
static ssize_t n_null_write(struct tty_struct *tty, struct file *file,
const unsigned char *buf, size_t nr)
{
return -EOPNOTSUPP;
}
static void n_null_receivebuf(struct tty_struct *tty,
const unsigned char *cp, char *fp,
int cnt)
{
}
static struct tty_ldisc_ops null_ldisc = {
.owner = THIS_MODULE,
.magic = TTY_LDISC_MAGIC,
.name = "n_null",
.open = n_null_open,
.close = n_null_close,
.read = n_null_read,
.write = n_null_write,
.receive_buf = n_null_receivebuf
};
static int __init n_null_init(void)
{
BUG_ON(tty_register_ldisc(N_NULL, &null_ldisc));
return 0;
}
static void __exit n_null_exit(void)
{
tty_unregister_ldisc(N_NULL);
}
module_init(n_null_init);
module_exit(n_null_exit);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Alan Cox");
MODULE_ALIAS_LDISC(N_NULL);
MODULE_DESCRIPTION("Null ldisc driver");

93
drivers/tty/pty.c
View File

@ -24,6 +24,9 @@
#include <linux/slab.h>
#include <linux/mutex.h>
#include <linux/poll.h>
#include <linux/mount.h>
#include <linux/file.h>
#include <linux/ioctl.h>
#undef TTY_DEBUG_HANGUP
#ifdef TTY_DEBUG_HANGUP
@ -66,8 +69,13 @@ static void pty_close(struct tty_struct *tty, struct file *filp)
#ifdef CONFIG_UNIX98_PTYS
if (tty->driver == ptm_driver) {
mutex_lock(&devpts_mutex);
if (tty->link->driver_data)
devpts_pty_kill(tty->link->driver_data);
if (tty->link->driver_data) {
struct path *path = tty->link->driver_data;
devpts_pty_kill(path->dentry);
path_put(path);
kfree(path);
}
mutex_unlock(&devpts_mutex);
}
#endif
@ -440,6 +448,48 @@ err:
return retval;
}
/**
* pty_open_peer - open the peer of a pty
* @tty: the peer of the pty being opened
*
* Open the cached dentry in tty->link, providing a safe way for userspace
* to get the slave end of a pty (where they have the master fd and cannot
* access or trust the mount namespace /dev/pts was mounted inside).
*/
static struct file *pty_open_peer(struct tty_struct *tty, int flags)
{
if (tty->driver->subtype != PTY_TYPE_MASTER)
return ERR_PTR(-EIO);
return dentry_open(tty->link->driver_data, flags, current_cred());
}
static int pty_get_peer(struct tty_struct *tty, int flags)
{
int fd = -1;
struct file *filp = NULL;
int retval = -EINVAL;
fd = get_unused_fd_flags(0);
if (fd < 0) {
retval = fd;
goto err;
}
filp = pty_open_peer(tty, flags);
if (IS_ERR(filp)) {
retval = PTR_ERR(filp);
goto err_put;
}
fd_install(fd, filp);
return fd;
err_put:
put_unused_fd(fd);
err:
return retval;
}
static void pty_cleanup(struct tty_struct *tty)
{
tty_port_put(tty->port);
@ -481,6 +531,16 @@ static int pty_bsd_ioctl(struct tty_struct *tty,
return -ENOIOCTLCMD;
}
static long pty_bsd_compat_ioctl(struct tty_struct *tty,
unsigned int cmd, unsigned long arg)
{
/*
* PTY ioctls don't require any special translation between 32-bit and
* 64-bit userspace, they are already compatible.
*/
return pty_bsd_ioctl(tty, cmd, arg);
}
static int legacy_count = CONFIG_LEGACY_PTY_COUNT;
/*
* not really modular, but the easiest way to keep compat with existing
@ -502,6 +562,7 @@ static const struct tty_operations master_pty_ops_bsd = {
.chars_in_buffer = pty_chars_in_buffer,
.unthrottle = pty_unthrottle,
.ioctl = pty_bsd_ioctl,
.compat_ioctl = pty_bsd_compat_ioctl,
.cleanup = pty_cleanup,
.resize = pty_resize,
.remove = pty_remove
@ -602,6 +663,8 @@ static int pty_unix98_ioctl(struct tty_struct *tty,
return pty_get_pktmode(tty, (int __user *)arg);
case TIOCGPTN: /* Get PT Number */
return put_user(tty->index, (unsigned int __user *)arg);
case TIOCGPTPEER: /* Open the other end */
return pty_get_peer(tty, (int) arg);
case TIOCSIG: /* Send signal to other side of pty */
return pty_signal(tty, (int) arg);
}
@ -609,6 +672,16 @@ static int pty_unix98_ioctl(struct tty_struct *tty,
return -ENOIOCTLCMD;
}
static long pty_unix98_compat_ioctl(struct tty_struct *tty,
unsigned int cmd, unsigned long arg)
{
/*
* PTY ioctls don't require any special translation between 32-bit and
* 64-bit userspace, they are already compatible.
*/
return pty_unix98_ioctl(tty, cmd, arg);
}
/**
* ptm_unix98_lookup - find a pty master
* @driver: ptm driver
@ -681,6 +754,7 @@ static const struct tty_operations ptm_unix98_ops = {
.chars_in_buffer = pty_chars_in_buffer,
.unthrottle = pty_unthrottle,
.ioctl = pty_unix98_ioctl,
.compat_ioctl = pty_unix98_compat_ioctl,
.resize = pty_resize,
.cleanup = pty_cleanup
};
@ -718,6 +792,7 @@ static int ptmx_open(struct inode *inode, struct file *filp)
{
struct pts_fs_info *fsi;
struct tty_struct *tty;
struct path *pts_path;
struct dentry *dentry;
int retval;
int index;
@ -771,16 +846,26 @@ static int ptmx_open(struct inode *inode, struct file *filp)
retval = PTR_ERR(dentry);
goto err_release;
}
tty->link->driver_data = dentry;
/* We need to cache a fake path for TIOCGPTPEER. */
pts_path = kmalloc(sizeof(struct path), GFP_KERNEL);
if (!pts_path)
goto err_release;
pts_path->mnt = filp->f_path.mnt;
pts_path->dentry = dentry;
path_get(pts_path);
tty->link->driver_data = pts_path;
retval = ptm_driver->ops->open(tty, filp);
if (retval)
goto err_release;
goto err_path_put;
tty_debug_hangup(tty, "opening (count=%d)\n", tty->count);
tty_unlock(tty);
return 0;
err_path_put:
path_put(pts_path);
kfree(pts_path);
err_release:
tty_unlock(tty);
// This will also put-ref the fsi

27
drivers/tty/rocket.c
View File

@ -947,18 +947,6 @@ static int rp_open(struct tty_struct *tty, struct file *filp)
tty_port_set_initialized(&info->port, 1);
/*
* Set up the tty->alt_speed kludge
*/
if ((info->flags & ROCKET_SPD_MASK) == ROCKET_SPD_HI)
tty->alt_speed = 57600;
if ((info->flags & ROCKET_SPD_MASK) == ROCKET_SPD_VHI)
tty->alt_speed = 115200;
if ((info->flags & ROCKET_SPD_MASK) == ROCKET_SPD_SHI)
tty->alt_speed = 230400;
if ((info->flags & ROCKET_SPD_MASK) == ROCKET_SPD_WARP)
tty->alt_speed = 460800;
configure_r_port(tty, info, NULL);
if (C_BAUD(tty)) {
sSetDTR(cp);
@ -1219,23 +1207,20 @@ static int set_config(struct tty_struct *tty, struct r_port *info,
return -EPERM;
}
info->flags = ((info->flags & ~ROCKET_USR_MASK) | (new_serial.flags & ROCKET_USR_MASK));
configure_r_port(tty, info, NULL);
mutex_unlock(&info->port.mutex);
return 0;
}
if ((new_serial.flags ^ info->flags) & ROCKET_SPD_MASK) {
/* warn about deprecation, unless clearing */
if (new_serial.flags & ROCKET_SPD_MASK)
dev_warn_ratelimited(tty->dev, "use of SPD flags is deprecated\n");
}
info->flags = ((info->flags & ~ROCKET_FLAGS) | (new_serial.flags & ROCKET_FLAGS));
info->port.close_delay = new_serial.close_delay;
info->port.closing_wait = new_serial.closing_wait;
if ((info->flags & ROCKET_SPD_MASK) == ROCKET_SPD_HI)
tty->alt_speed = 57600;
if ((info->flags & ROCKET_SPD_MASK) == ROCKET_SPD_VHI)
tty->alt_speed = 115200;
if ((info->flags & ROCKET_SPD_MASK) == ROCKET_SPD_SHI)
tty->alt_speed = 230400;
if ((info->flags & ROCKET_SPD_MASK) == ROCKET_SPD_WARP)
tty->alt_speed = 460800;
mutex_unlock(&info->port.mutex);
configure_r_port(tty, info, NULL);

2
drivers/tty/serdev/serdev-ttyport.c
View File

@ -148,7 +148,7 @@ static unsigned int ttyport_set_baudrate(struct serdev_controller *ctrl, unsigne
/* tty_set_termios() return not checked as it is always 0 */
tty_set_termios(tty, &ktermios);
return speed;
return ktermios.c_ospeed;
}
static void ttyport_set_flow_control(struct serdev_controller *ctrl, bool enable)

3
drivers/tty/serial/8250/8250.h
View File

@ -81,6 +81,9 @@ struct serial8250_config {
#define UART_CAP_HFIFO (1 << 14) /* UART has a "hidden" FIFO */
#define UART_CAP_RPM (1 << 15) /* Runtime PM is active while idle */
#define UART_CAP_IRDA (1 << 16) /* UART supports IrDA line discipline */
#define UART_CAP_MINI (1 << 17) /* Mini UART on BCM283X family lacks:
* STOP PARITY EPAR SPAR WLEN5 WLEN6
*/
#define UART_BUG_QUOT (1 << 0) /* UART has buggy quot LSB */
#define UART_BUG_TXEN (1 << 1) /* UART has buggy TX IIR status */

323
drivers/tty/serial/8250/8250_aspeed_vuart.c Normal file
View File

@ -0,0 +1,323 @@
/*
* Serial Port driver for Aspeed VUART device
*
* Copyright (C) 2016 Jeremy Kerr <jk@ozlabs.org>, IBM Corp.
* Copyright (C) 2006 Arnd Bergmann <arnd@arndb.de>, IBM Corp.
*
* 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.
*/
#include <linux/device.h>
#include <linux/module.h>
#include <linux/of_address.h>
#include <linux/of_irq.h>
#include <linux/of_platform.h>
#include <linux/clk.h>
#include "8250.h"
#define ASPEED_VUART_GCRA 0x20
#define ASPEED_VUART_GCRA_VUART_EN BIT(0)
#define ASPEED_VUART_GCRA_DISABLE_HOST_TX_DISCARD BIT(5)
#define ASPEED_VUART_GCRB 0x24
#define ASPEED_VUART_GCRB_HOST_SIRQ_MASK GENMASK(7, 4)
#define ASPEED_VUART_GCRB_HOST_SIRQ_SHIFT 4
#define ASPEED_VUART_ADDRL 0x28
#define ASPEED_VUART_ADDRH 0x2c
struct aspeed_vuart {
struct device *dev;
void __iomem *regs;
struct clk *clk;
int line;
};
/*
* The VUART is basically two UART 'front ends' connected by their FIFO
* (no actual serial line in between). One is on the BMC side (management
* controller) and one is on the host CPU side.
*
* It allows the BMC to provide to the host a "UART" that pipes into
* the BMC itself and can then be turned by the BMC into a network console
* of some sort for example.
*
* This driver is for the BMC side. The sysfs files allow the BMC
* userspace which owns the system configuration policy, to specify
* at what IO port and interrupt number the host side will appear
* to the host on the Host <-> BMC LPC bus. It could be different on a
* different system (though most of them use 3f8/4).
*/
static ssize_t lpc_address_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct aspeed_vuart *vuart = dev_get_drvdata(dev);
u16 addr;
addr = (readb(vuart->regs + ASPEED_VUART_ADDRH) << 8) |
(readb(vuart->regs + ASPEED_VUART_ADDRL));
return snprintf(buf, PAGE_SIZE - 1, "0x%x\n", addr);
}
static ssize_t lpc_address_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct aspeed_vuart *vuart = dev_get_drvdata(dev);
unsigned long val;
int err;
err = kstrtoul(buf, 0, &val);
if (err)
return err;
writeb(val >> 8, vuart->regs + ASPEED_VUART_ADDRH);
writeb(val >> 0, vuart->regs + ASPEED_VUART_ADDRL);
return count;
}
static DEVICE_ATTR_RW(lpc_address);
static ssize_t sirq_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct aspeed_vuart *vuart = dev_get_drvdata(dev);
u8 reg;
reg = readb(vuart->regs + ASPEED_VUART_GCRB);
reg &= ASPEED_VUART_GCRB_HOST_SIRQ_MASK;
reg >>= ASPEED_VUART_GCRB_HOST_SIRQ_SHIFT;
return snprintf(buf, PAGE_SIZE - 1, "%u\n", reg);
}
static ssize_t sirq_store(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct aspeed_vuart *vuart = dev_get_drvdata(dev);
unsigned long val;
int err;
u8 reg;
err = kstrtoul(buf, 0, &val);
if (err)
return err;
val <<= ASPEED_VUART_GCRB_HOST_SIRQ_SHIFT;
val &= ASPEED_VUART_GCRB_HOST_SIRQ_MASK;
reg = readb(vuart->regs + ASPEED_VUART_GCRB);
reg &= ~ASPEED_VUART_GCRB_HOST_SIRQ_MASK;
reg |= val;
writeb(reg, vuart->regs + ASPEED_VUART_GCRB);
return count;
}
static DEVICE_ATTR_RW(sirq);
static struct attribute *aspeed_vuart_attrs[] = {
&dev_attr_sirq.attr,
&dev_attr_lpc_address.attr,
NULL,
};
static const struct attribute_group aspeed_vuart_attr_group = {
.attrs = aspeed_vuart_attrs,
};
static void aspeed_vuart_set_enabled(struct aspeed_vuart *vuart, bool enabled)
{
u8 reg = readb(vuart->regs + ASPEED_VUART_GCRA);
if (enabled)
reg |= ASPEED_VUART_GCRA_VUART_EN;
else
reg &= ~ASPEED_VUART_GCRA_VUART_EN;
writeb(reg, vuart->regs + ASPEED_VUART_GCRA);
}
static void aspeed_vuart_set_host_tx_discard(struct aspeed_vuart *vuart,
bool discard)
{
u8 reg;
reg = readb(vuart->regs + ASPEED_VUART_GCRA);
/* If the DISABLE_HOST_TX_DISCARD bit is set, discard is disabled */
if (!discard)
reg |= ASPEED_VUART_GCRA_DISABLE_HOST_TX_DISCARD;
else
reg &= ~ASPEED_VUART_GCRA_DISABLE_HOST_TX_DISCARD;
writeb(reg, vuart->regs + ASPEED_VUART_GCRA);
}
static int aspeed_vuart_startup(struct uart_port *uart_port)
{
struct uart_8250_port *uart_8250_port = up_to_u8250p(uart_port);
struct aspeed_vuart *vuart = uart_8250_port->port.private_data;
int rc;
rc = serial8250_do_startup(uart_port);
if (rc)
return rc;
aspeed_vuart_set_host_tx_discard(vuart, false);
return 0;
}
static void aspeed_vuart_shutdown(struct uart_port *uart_port)
{
struct uart_8250_port *uart_8250_port = up_to_u8250p(uart_port);
struct aspeed_vuart *vuart = uart_8250_port->port.private_data;
aspeed_vuart_set_host_tx_discard(vuart, true);
serial8250_do_shutdown(uart_port);
}
static int aspeed_vuart_probe(struct platform_device *pdev)
{
struct uart_8250_port port;
struct aspeed_vuart *vuart;
struct device_node *np;
struct resource *res;
u32 clk, prop;
int rc;
np = pdev->dev.of_node;
vuart = devm_kzalloc(&pdev->dev, sizeof(*vuart), GFP_KERNEL);
if (!vuart)
return -ENOMEM;
vuart->dev = &pdev->dev;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
vuart->regs = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(vuart->regs))
return PTR_ERR(vuart->regs);
memset(&port, 0, sizeof(port));
port.port.private_data = vuart;
port.port.membase = vuart->regs;
port.port.mapbase = res->start;
port.port.mapsize = resource_size(res);
port.port.startup = aspeed_vuart_startup;
port.port.shutdown = aspeed_vuart_shutdown;
port.port.dev = &pdev->dev;
rc = sysfs_create_group(&vuart->dev->kobj, &aspeed_vuart_attr_group);
if (rc < 0)
return rc;
if (of_property_read_u32(np, "clock-frequency", &clk)) {
vuart->clk = devm_clk_get(&pdev->dev, NULL);
if (IS_ERR(vuart->clk)) {
dev_warn(&pdev->dev,
"clk or clock-frequency not defined\n");
return PTR_ERR(vuart->clk);
}
rc = clk_prepare_enable(vuart->clk);
if (rc < 0)
return rc;
clk = clk_get_rate(vuart->clk);
}
/* If current-speed was set, then try not to change it. */
if (of_property_read_u32(np, "current-speed", &prop) == 0)
port.port.custom_divisor = clk / (16 * prop);
/* Check for shifted address mapping */
if (of_property_read_u32(np, "reg-offset", &prop) == 0)
port.port.mapbase += prop;
/* Check for registers offset within the devices address range */
if (of_property_read_u32(np, "reg-shift", &prop) == 0)
port.port.regshift = prop;
/* Check for fifo size */
if (of_property_read_u32(np, "fifo-size", &prop) == 0)
port.port.fifosize = prop;
/* Check for a fixed line number */
rc = of_alias_get_id(np, "serial");
if (rc >= 0)
port.port.line = rc;
port.port.irq = irq_of_parse_and_map(np, 0);
port.port.irqflags = IRQF_SHARED;
port.port.iotype = UPIO_MEM;
port.port.type = PORT_16550A;
port.port.uartclk = clk;
port.port.flags = UPF_SHARE_IRQ | UPF_BOOT_AUTOCONF
| UPF_FIXED_PORT | UPF_FIXED_TYPE | UPF_NO_THRE_TEST;
if (of_property_read_bool(np, "no-loopback-test"))
port.port.flags |= UPF_SKIP_TEST;
if (port.port.fifosize)
port.capabilities = UART_CAP_FIFO;
if (of_property_read_bool(np, "auto-flow-control"))
port.capabilities |= UART_CAP_AFE;
rc = serial8250_register_8250_port(&port);
if (rc < 0)
goto err_clk_disable;
vuart->line = rc;
aspeed_vuart_set_enabled(vuart, true);
aspeed_vuart_set_host_tx_discard(vuart, true);
platform_set_drvdata(pdev, vuart);
return 0;
err_clk_disable:
clk_disable_unprepare(vuart->clk);
irq_dispose_mapping(port.port.irq);
return rc;
}
static int aspeed_vuart_remove(struct platform_device *pdev)
{
struct aspeed_vuart *vuart = platform_get_drvdata(pdev);
aspeed_vuart_set_enabled(vuart, false);
serial8250_unregister_port(vuart->line);
sysfs_remove_group(&vuart->dev->kobj, &aspeed_vuart_attr_group);
clk_disable_unprepare(vuart->clk);
return 0;
}
static const struct of_device_id aspeed_vuart_table[] = {
{ .compatible = "aspeed,ast2400-vuart" },
{ .compatible = "aspeed,ast2500-vuart" },
{ },
};
static struct platform_driver aspeed_vuart_driver = {
.driver = {
.name = "aspeed-vuart",
.of_match_table = aspeed_vuart_table,
},
.probe = aspeed_vuart_probe,
.remove = aspeed_vuart_remove,
};
module_platform_driver(aspeed_vuart_driver);
MODULE_AUTHOR("Jeremy Kerr <jk@ozlabs.org>");
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Driver for Aspeed VUART device");

2
drivers/tty/serial/8250/8250_bcm2835aux.c
View File

@ -39,7 +39,7 @@ static int bcm2835aux_serial_probe(struct platform_device *pdev)
/* initialize data */
spin_lock_init(&data->uart.port.lock);
data->uart.capabilities = UART_CAP_FIFO;
data->uart.capabilities = UART_CAP_FIFO | UART_CAP_MINI;
data->uart.port.dev = &pdev->dev;
data->uart.port.regshift = 2;
data->uart.port.type = PORT_16550;

23
drivers/tty/serial/8250/8250_core.c
View File

@ -1043,24 +1043,13 @@ int serial8250_register_8250_port(struct uart_8250_port *up)
if (up->dl_write)
uart->dl_write = up->dl_write;
if (uart->port.type != PORT_8250_CIR) {
if (serial8250_isa_config != NULL)
serial8250_isa_config(0, &uart->port,
&uart->capabilities);
if (serial8250_isa_config != NULL)
serial8250_isa_config(0, &uart->port,
&uart->capabilities);
ret = uart_add_one_port(&serial8250_reg,
&uart->port);
if (ret == 0)
ret = uart->port.line;
} else {
dev_info(uart->port.dev,
"skipping CIR port at 0x%lx / 0x%llx, IRQ %d\n",
uart->port.iobase,
(unsigned long long)uart->port.mapbase,
uart->port.irq);
ret = 0;
}
ret = uart_add_one_port(&serial8250_reg, &uart->port);
if (ret == 0)
ret = uart->port.line;
}
mutex_unlock(&serial_mutex);

16
drivers/tty/serial/8250/8250_exar.c
View File

@ -109,7 +109,6 @@ pci_fastcom335_setup(struct exar8250 *priv, struct pci_dev *pcidev,
u8 __iomem *p;
int err;
port->port.flags |= UPF_EXAR_EFR;
port->port.uartclk = baud * 16;
err = default_setup(priv, pcidev, idx, offset, port);
@ -171,19 +170,26 @@ pci_xr17c154_setup(struct exar8250 *priv, struct pci_dev *pcidev,
return default_setup(priv, pcidev, idx, offset, port);
}
static void setup_gpio(u8 __iomem *p)
static void setup_gpio(struct pci_dev *pcidev, u8 __iomem *p)
{
/*
* The Commtech adapters required the MPIOs to be driven low. The Exar
* devices will export them as GPIOs, so we pre-configure them safely
* as inputs.
*/
u8 dir = pcidev->vendor == PCI_VENDOR_ID_EXAR ? 0xff : 0x00;
writeb(0x00, p + UART_EXAR_MPIOINT_7_0);
writeb(0x00, p + UART_EXAR_MPIOLVL_7_0);
writeb(0x00, p + UART_EXAR_MPIO3T_7_0);
writeb(0x00, p + UART_EXAR_MPIOINV_7_0);
writeb(0x00, p + UART_EXAR_MPIOSEL_7_0);
writeb(dir, p + UART_EXAR_MPIOSEL_7_0);
writeb(0x00, p + UART_EXAR_MPIOOD_7_0);
writeb(0x00, p + UART_EXAR_MPIOINT_15_8);
writeb(0x00, p + UART_EXAR_MPIOLVL_15_8);
writeb(0x00, p + UART_EXAR_MPIO3T_15_8);
writeb(0x00, p + UART_EXAR_MPIOINV_15_8);
writeb(0x00, p + UART_EXAR_MPIOSEL_15_8);
writeb(dir, p + UART_EXAR_MPIOSEL_15_8);
writeb(0x00, p + UART_EXAR_MPIOOD_15_8);
}
@ -236,7 +242,7 @@ pci_xr17v35x_setup(struct exar8250 *priv, struct pci_dev *pcidev,
if (idx == 0) {
/* Setup Multipurpose Input/Output pins. */
setup_gpio(p);
setup_gpio(pcidev, p);
port->port.private_data = xr17v35x_register_gpio(pcidev);
}

10
drivers/tty/serial/8250/8250_of.c
View File

@ -19,11 +19,13 @@
#include <linux/of_irq.h>
#include <linux/of_platform.h>
#include <linux/clk.h>
#include <linux/reset.h>
#include "8250.h"
struct of_serial_info {
struct clk *clk;
struct reset_control *rst;
int type;
int line;
};
@ -132,6 +134,13 @@ static int of_platform_serial_setup(struct platform_device *ofdev,
}
}
info->rst = devm_reset_control_get_optional_shared(&ofdev->dev, NULL);
if (IS_ERR(info->rst))
goto out;
ret = reset_control_deassert(info->rst);
if (ret)
goto out;
port->type = type;
port->uartclk = clk;
port->flags = UPF_SHARE_IRQ | UPF_BOOT_AUTOCONF | UPF_IOREMAP
@ -229,6 +238,7 @@ static int of_platform_serial_remove(struct platform_device *ofdev)
serial8250_unregister_port(info->line);
reset_control_assert(info->rst);
if (info->clk)
clk_disable_unprepare(info->clk);
kfree(info);

27
drivers/tty/serial/8250/8250_omap.c
View File

@ -613,6 +613,10 @@ static int omap_8250_startup(struct uart_port *port)
up->lsr_saved_flags = 0;
up->msr_saved_flags = 0;
/* Disable DMA for console UART */
if (uart_console(port))
up->dma = NULL;
if (up->dma) {
ret = serial8250_request_dma(up);
if (ret) {
@ -782,8 +786,27 @@ unlock:
static void __dma_rx_complete(void *param)
{
__dma_rx_do_complete(param);
omap_8250_rx_dma(param);
struct uart_8250_port *p = param;
struct uart_8250_dma *dma = p->dma;
struct dma_tx_state state;
unsigned long flags;
spin_lock_irqsave(&p->port.lock, flags);
/*
* If the tx status is not DMA_COMPLETE, then this is a delayed
* completion callback. A previous RX timeout flush would have
* already pushed the data, so exit.
*/
if (dmaengine_tx_status(dma->rxchan, dma->rx_cookie, &state) !=
DMA_COMPLETE) {
spin_unlock_irqrestore(&p->port.lock, flags);
return;
}
__dma_rx_do_complete(p);
omap_8250_rx_dma(p);
spin_unlock_irqrestore(&p->port.lock, flags);
}
static void omap_8250_rx_dma_flush(struct uart_8250_port *p)

12
drivers/tty/serial/8250/8250_port.c
View File

@ -1764,6 +1764,10 @@ void serial8250_tx_chars(struct uart_8250_port *up)
if ((up->capabilities & UART_CAP_HFIFO) &&
(serial_in(up, UART_LSR) & BOTH_EMPTY) != BOTH_EMPTY)
break;
/* The BCM2835 MINI UART THRE bit is really a not-full bit. */
if ((up->capabilities & UART_CAP_MINI) &&
!(serial_in(up, UART_LSR) & UART_LSR_THRE))
break;
} while (--count > 0);
if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
@ -2228,7 +2232,7 @@ int serial8250_do_startup(struct uart_port *port)
}
}
if (port->irq) {
if (port->irq && !(up->port.flags & UPF_NO_THRE_TEST)) {
unsigned char iir1;
/*
* Test for UARTs that do not reassert THRE when the
@ -2585,6 +2589,12 @@ serial8250_do_set_termios(struct uart_port *port, struct ktermios *termios,
unsigned long flags;
unsigned int baud, quot, frac = 0;
if (up->capabilities & UART_CAP_MINI) {
termios->c_cflag &= ~(CSTOPB | PARENB | PARODD | CMSPAR);
if ((termios->c_cflag & CSIZE) == CS5 ||
(termios->c_cflag & CSIZE) == CS6)
termios->c_cflag = (termios->c_cflag & ~CSIZE) | CS7;
}
cval = serial8250_compute_lcr(up, termios->c_cflag);
baud = serial8250_get_baud_rate(port, termios, old);

10
drivers/tty/serial/8250/Kconfig
View File

@ -224,6 +224,16 @@ config SERIAL_8250_ACCENT
To compile this driver as a module, choose M here: the module
will be called 8250_accent.
config SERIAL_8250_ASPEED_VUART
tristate "Aspeed Virtual UART"
depends on SERIAL_8250
depends on OF
help
If you want to use the virtual UART (VUART) device on Aspeed
BMC platforms, enable this option. This enables the 16550A-
compatible device on the local LPC bus, giving a UART device
with no physical RS232 connections.
config SERIAL_8250_BOCA
tristate "Support Boca cards"
depends on SERIAL_8250 != n && ISA && SERIAL_8250_MANY_PORTS

1
drivers/tty/serial/8250/Makefile
View File

@ -14,6 +14,7 @@ obj-$(CONFIG_SERIAL_8250_EXAR) += 8250_exar.o
obj-$(CONFIG_SERIAL_8250_HP300) += 8250_hp300.o
obj-$(CONFIG_SERIAL_8250_CS) += serial_cs.o
obj-$(CONFIG_SERIAL_8250_ACORN) += 8250_acorn.o
obj-$(CONFIG_SERIAL_8250_ASPEED_VUART) += 8250_aspeed_vuart.o
obj-$(CONFIG_SERIAL_8250_BCM2835AUX) += 8250_bcm2835aux.o
obj-$(CONFIG_SERIAL_8250_CONSOLE) += 8250_early.o
obj-$(CONFIG_SERIAL_8250_FOURPORT) += 8250_fourport.o

35
drivers/tty/serial/Kconfig
View File

@ -114,32 +114,32 @@ config SERIAL_SB1250_DUART_CONSOLE
If unsure, say Y.
config SERIAL_ATMEL
bool "AT91 / AT32 on-chip serial port support"
bool "AT91 on-chip serial port support"
depends on HAS_DMA
depends on ARCH_AT91 || AVR32 || COMPILE_TEST
depends on ARCH_AT91 || COMPILE_TEST
select SERIAL_CORE
select SERIAL_MCTRL_GPIO if GPIOLIB
help
This enables the driver for the on-chip UARTs of the Atmel
AT91 and AT32 processors.
AT91 processors.
config SERIAL_ATMEL_CONSOLE
bool "Support for console on AT91 / AT32 serial port"
bool "Support for console on AT91 serial port"
depends on SERIAL_ATMEL=y
select SERIAL_CORE_CONSOLE
help
Say Y here if you wish to use an on-chip UART on a Atmel
AT91 or AT32 processor as the system console (the system
AT91 processor as the system console (the system
console is the device which receives all kernel messages and
warnings and which allows logins in single user mode).
config SERIAL_ATMEL_PDC
bool "Support DMA transfers on AT91 / AT32 serial port"
bool "Support DMA transfers on AT91 serial port"
depends on SERIAL_ATMEL
default y
help
Say Y here if you wish to use the PDC to do DMA transfers to
and from the Atmel AT91 / AT32 serial port. In order to
and from the Atmel AT91 serial port. In order to
actually use DMA transfers, make sure that the use_dma_tx
and use_dma_rx members in the atmel_uart_data struct is set
appropriately for each port.
@ -152,7 +152,7 @@ config SERIAL_ATMEL_TTYAT
bool "Install as device ttyATn instead of ttySn"
depends on SERIAL_ATMEL=y
help
Say Y here if you wish to have the internal AT91 / AT32 UARTs
Say Y here if you wish to have the internal AT91 UARTs
appear as /dev/ttyATn (major 204, minor starting at 154)
instead of the normal /dev/ttySn (major 4, minor starting at
64). This is necessary if you also want other UARTs, such as
@ -1688,6 +1688,25 @@ config SERIAL_MVEBU_CONSOLE
and warnings and which allows logins in single user mode)
Otherwise, say 'N'.
config SERIAL_OWL
bool "Actions Semi Owl serial port support"
depends on ARCH_ACTIONS || COMPILE_TEST
select SERIAL_CORE
help
This driver is for Actions Semiconductor S500/S900 SoC's UART.
Say 'Y' here if you wish to use the on-board serial port.
Otherwise, say 'N'.
config SERIAL_OWL_CONSOLE
bool "Console on Actions Semi Owl serial port"
depends on SERIAL_OWL=y
select SERIAL_CORE_CONSOLE
select SERIAL_EARLYCON
default y
help
Say 'Y' here if you wish to use Actions Semiconductor S500/S900 UART
as the system console. Only earlycon is implemented currently.
endmenu
config SERIAL_MCTRL_GPIO

1
drivers/tty/serial/Makefile
View File

@ -92,6 +92,7 @@ obj-$(CONFIG_SERIAL_STM32) += stm32-usart.o
obj-$(CONFIG_SERIAL_MVEBU_UART) += mvebu-uart.o
obj-$(CONFIG_SERIAL_PIC32) += pic32_uart.o
obj-$(CONFIG_SERIAL_MPS2_UART) += mps2-uart.o
obj-$(CONFIG_SERIAL_OWL) += owl-uart.o
# GPIOLIB helpers for modem control lines
obj-$(CONFIG_SERIAL_MCTRL_GPIO) += serial_mctrl_gpio.o

31
drivers/tty/serial/amba-pl010.c
View File

@ -697,6 +697,7 @@ static struct console amba_console = {
#define AMBA_CONSOLE NULL
#endif
static DEFINE_MUTEX(amba_reg_lock);
static struct uart_driver amba_reg = {
.owner = THIS_MODULE,
.driver_name = "ttyAM",
@ -749,6 +750,19 @@ static int pl010_probe(struct amba_device *dev, const struct amba_id *id)
amba_ports[i] = uap;
amba_set_drvdata(dev, uap);
mutex_lock(&amba_reg_lock);
if (!amba_reg.state) {
ret = uart_register_driver(&amba_reg);
if (ret < 0) {
mutex_unlock(&amba_reg_lock);
dev_err(uap->port.dev,
"Failed to register AMBA-PL010 driver\n");
return ret;
}
}
mutex_unlock(&amba_reg_lock);
ret = uart_add_one_port(&amba_reg, &uap->port);
if (ret)
amba_ports[i] = NULL;
@ -760,12 +774,18 @@ static int pl010_remove(struct amba_device *dev)
{
struct uart_amba_port *uap = amba_get_drvdata(dev);
int i;
bool busy = false;
uart_remove_one_port(&amba_reg, &uap->port);
for (i = 0; i < ARRAY_SIZE(amba_ports); i++)
if (amba_ports[i] == uap)
amba_ports[i] = NULL;
else if (amba_ports[i])
busy = true;
if (!busy)
uart_unregister_driver(&amba_reg);
return 0;
}
@ -816,23 +836,14 @@ static struct amba_driver pl010_driver = {
static int __init pl010_init(void)
{
int ret;
printk(KERN_INFO "Serial: AMBA driver\n");
ret = uart_register_driver(&amba_reg);
if (ret == 0) {
ret = amba_driver_register(&pl010_driver);
if (ret)
uart_unregister_driver(&amba_reg);
}
return ret;
return amba_driver_register(&pl010_driver);
}
static void __exit pl010_exit(void)
{
amba_driver_unregister(&pl010_driver);
uart_unregister_driver(&amba_reg);
}
module_init(pl010_init);

168
drivers/tty/serial/atmel_serial.c
View File

@ -1,5 +1,5 @@
/*
* Driver for Atmel AT91 / AT32 Serial ports
* Driver for Atmel AT91 Serial ports
* Copyright (C) 2003 Rick Bronson
*
* Based on drivers/char/serial_sa1100.c, by Deep Blue Solutions Ltd.
@ -46,6 +46,7 @@
#include <linux/err.h>
#include <linux/irq.h>
#include <linux/suspend.h>
#include <linux/mm.h>
#include <asm/io.h>
#include <asm/ioctls.h>
@ -118,7 +119,6 @@ struct atmel_uart_char {
/*
* at91: 6 USARTs and one DBGU port (SAM9260)
* avr32: 4
* samx7: 3 USARTs and 5 UARTs
*/
#define ATMEL_MAX_UART 8
@ -228,21 +228,6 @@ static inline void atmel_uart_writel(struct uart_port *port, u32 reg, u32 value)
__raw_writel(value, port->membase + reg);
}
#ifdef CONFIG_AVR32
/* AVR32 cannot handle 8 or 16bit I/O accesses but only 32bit I/O accesses */
static inline u8 atmel_uart_read_char(struct uart_port *port)
{
return __raw_readl(port->membase + ATMEL_US_RHR);
}
static inline void atmel_uart_write_char(struct uart_port *port, u8 value)
{
__raw_writel(value, port->membase + ATMEL_US_THR);
}
#else
static inline u8 atmel_uart_read_char(struct uart_port *port)
{
return __raw_readb(port->membase + ATMEL_US_RHR);
@ -253,8 +238,6 @@ static inline void atmel_uart_write_char(struct uart_port *port, u8 value)
__raw_writeb(value, port->membase + ATMEL_US_THR);
}
#endif
#ifdef CONFIG_SERIAL_ATMEL_PDC
static bool atmel_use_pdc_rx(struct uart_port *port)
{
@ -959,7 +942,7 @@ static int atmel_prepare_tx_dma(struct uart_port *port)
sg_set_page(&atmel_port->sg_tx,
virt_to_page(port->state->xmit.buf),
UART_XMIT_SIZE,
(unsigned long)port->state->xmit.buf & ~PAGE_MASK);
offset_in_page(port->state->xmit.buf));
nent = dma_map_sg(port->dev,
&atmel_port->sg_tx,
1,
@ -1141,7 +1124,7 @@ static int atmel_prepare_rx_dma(struct uart_port *port)
sg_set_page(&atmel_port->sg_rx,
virt_to_page(ring->buf),
sizeof(struct atmel_uart_char) * ATMEL_SERIAL_RINGSIZE,
(unsigned long)ring->buf & ~PAGE_MASK);
offset_in_page(ring->buf));
nent = dma_map_sg(port->dev,
&atmel_port->sg_rx,
1,
@ -1655,72 +1638,56 @@ static void atmel_init_property(struct atmel_uart_port *atmel_port,
struct platform_device *pdev)
{
struct device_node *np = pdev->dev.of_node;
struct atmel_uart_data *pdata = dev_get_platdata(&pdev->dev);
if (np) {
/* DMA/PDC usage specification */
if (of_property_read_bool(np, "atmel,use-dma-rx")) {
if (of_property_read_bool(np, "dmas")) {
atmel_port->use_dma_rx = true;
atmel_port->use_pdc_rx = false;
} else {
atmel_port->use_dma_rx = false;
atmel_port->use_pdc_rx = true;
}
/* DMA/PDC usage specification */
if (of_property_read_bool(np, "atmel,use-dma-rx")) {
if (of_property_read_bool(np, "dmas")) {
atmel_port->use_dma_rx = true;
atmel_port->use_pdc_rx = false;
} else {
atmel_port->use_dma_rx = false;
atmel_port->use_pdc_rx = false;
atmel_port->use_pdc_rx = true;
}
if (of_property_read_bool(np, "atmel,use-dma-tx")) {
if (of_property_read_bool(np, "dmas")) {
atmel_port->use_dma_tx = true;
atmel_port->use_pdc_tx = false;
} else {
atmel_port->use_dma_tx = false;
atmel_port->use_pdc_tx = true;
}
} else {
atmel_port->use_dma_tx = false;
atmel_port->use_pdc_tx = false;
}
} else {
atmel_port->use_pdc_rx = pdata->use_dma_rx;
atmel_port->use_pdc_tx = pdata->use_dma_tx;
atmel_port->use_dma_rx = false;
atmel_port->use_dma_tx = false;
atmel_port->use_pdc_rx = false;
}
if (of_property_read_bool(np, "atmel,use-dma-tx")) {
if (of_property_read_bool(np, "dmas")) {
atmel_port->use_dma_tx = true;
atmel_port->use_pdc_tx = false;
} else {
atmel_port->use_dma_tx = false;
atmel_port->use_pdc_tx = true;
}
} else {
atmel_port->use_dma_tx = false;
atmel_port->use_pdc_tx = false;
}
}
static void atmel_init_rs485(struct uart_port *port,
struct platform_device *pdev)
{
struct device_node *np = pdev->dev.of_node;
struct atmel_uart_data *pdata = dev_get_platdata(&pdev->dev);
if (np) {
struct serial_rs485 *rs485conf = &port->rs485;
u32 rs485_delay[2];
/* rs485 properties */
if (of_property_read_u32_array(np, "rs485-rts-delay",
rs485_delay, 2) == 0) {
rs485conf->delay_rts_before_send = rs485_delay[0];
rs485conf->delay_rts_after_send = rs485_delay[1];
rs485conf->flags = 0;
}
struct serial_rs485 *rs485conf = &port->rs485;
u32 rs485_delay[2];
if (of_get_property(np, "rs485-rx-during-tx", NULL))
rs485conf->flags |= SER_RS485_RX_DURING_TX;
if (of_get_property(np, "linux,rs485-enabled-at-boot-time",
NULL))
rs485conf->flags |= SER_RS485_ENABLED;
} else {
port->rs485 = pdata->rs485;
/* rs485 properties */
if (of_property_read_u32_array(np, "rs485-rts-delay",
rs485_delay, 2) == 0) {
rs485conf->delay_rts_before_send = rs485_delay[0];
rs485conf->delay_rts_after_send = rs485_delay[1];
rs485conf->flags = 0;
}
if (of_get_property(np, "rs485-rx-during-tx", NULL))
rs485conf->flags |= SER_RS485_RX_DURING_TX;
if (of_get_property(np, "linux,rs485-enabled-at-boot-time", NULL))
rs485conf->flags |= SER_RS485_ENABLED;
}
static void atmel_set_ops(struct uart_port *port)
@ -2402,7 +2369,6 @@ static int atmel_init_port(struct atmel_uart_port *atmel_port,
{
int ret;
struct uart_port *port = &atmel_port->uart;
struct atmel_uart_data *pdata = dev_get_platdata(&pdev->dev);
atmel_init_property(atmel_port, pdev);
atmel_set_ops(port);
@ -2410,24 +2376,17 @@ static int atmel_init_port(struct atmel_uart_port *atmel_port,
atmel_init_rs485(port, pdev);
port->iotype = UPIO_MEM;
port->flags = UPF_BOOT_AUTOCONF;
port->flags = UPF_BOOT_AUTOCONF | UPF_IOREMAP;
port->ops = &atmel_pops;
port->fifosize = 1;
port->dev = &pdev->dev;
port->mapbase = pdev->resource[0].start;
port->irq = pdev->resource[1].start;
port->rs485_config = atmel_config_rs485;
port->membase = NULL;
memset(&atmel_port->rx_ring, 0, sizeof(atmel_port->rx_ring));
if (pdata && pdata->regs) {
/* Already mapped by setup code */
port->membase = pdata->regs;
} else {
port->flags |= UPF_IOREMAP;
port->membase = NULL;
}
/* for console, the clock could already be configured */
if (!atmel_port->clk) {
atmel_port->clk = clk_get(&pdev->dev, "usart");
@ -2460,8 +2419,6 @@ static int atmel_init_port(struct atmel_uart_port *atmel_port,
return 0;
}
struct platform_device *atmel_default_console_device; /* the serial console device */
#ifdef CONFIG_SERIAL_ATMEL_CONSOLE
static void atmel_console_putchar(struct uart_port *port, int ch)
{
@ -2594,47 +2551,6 @@ static struct console atmel_console = {
#define ATMEL_CONSOLE_DEVICE (&atmel_console)
/*
* Early console initialization (before VM subsystem initialized).
*/
static int __init atmel_console_init(void)
{
int ret;
if (atmel_default_console_device) {
struct atmel_uart_data *pdata =
dev_get_platdata(&atmel_default_console_device->dev);
int id = pdata->num;
struct atmel_uart_port *atmel_port = &atmel_ports[id];
atmel_port->backup_imr = 0;
atmel_port->uart.line = id;
add_preferred_console(ATMEL_DEVICENAME, id, NULL);
ret = atmel_init_port(atmel_port, atmel_default_console_device);
if (ret)
return ret;
register_console(&atmel_console);
}
return 0;
}
console_initcall(atmel_console_init);
/*
* Late console initialization.
*/
static int __init atmel_late_console_init(void)
{
if (atmel_default_console_device
&& !(atmel_console.flags & CON_ENABLED))
register_console(&atmel_console);
return 0;
}
core_initcall(atmel_late_console_init);
static inline bool atmel_is_console_port(struct uart_port *port)
{
return port->cons && port->cons->index == port->line;
@ -2804,19 +2720,13 @@ static int atmel_serial_probe(struct platform_device *pdev)
{
struct atmel_uart_port *atmel_port;
struct device_node *np = pdev->dev.of_node;
struct atmel_uart_data *pdata = dev_get_platdata(&pdev->dev);
void *data;
int ret = -ENODEV;
bool rs485_enabled;
BUILD_BUG_ON(ATMEL_SERIAL_RINGSIZE & (ATMEL_SERIAL_RINGSIZE - 1));
if (np)
ret = of_alias_get_id(np, "serial");
else
if (pdata)
ret = pdata->num;
ret = of_alias_get_id(np, "serial");
if (ret < 0)
/* port id not found in platform data nor device-tree aliases:
* auto-enumerate it */

286
drivers/tty/serial/fsl_lpuart.c
View File

@ -140,6 +140,8 @@
#define UARTBAUD_SBNS 0x00002000
#define UARTBAUD_SBR 0x00000000
#define UARTBAUD_SBR_MASK 0x1fff
#define UARTBAUD_OSR_MASK 0x1f
#define UARTBAUD_OSR_SHIFT 24
#define UARTSTAT_LBKDIF 0x80000000
#define UARTSTAT_RXEDGIF 0x40000000
@ -231,12 +233,14 @@
#define DEV_NAME "ttyLP"
#define UART_NR 6
/* IMX lpuart has four extra unused regs located at the beginning */
#define IMX_REG_OFF 0x10
struct lpuart_port {
struct uart_port port;
struct clk *clk;
unsigned int txfifo_size;
unsigned int rxfifo_size;
bool lpuart32;
bool lpuart_dma_tx_use;
bool lpuart_dma_rx_use;
@ -258,13 +262,28 @@ struct lpuart_port {
wait_queue_head_t dma_wait;
};
struct lpuart_soc_data {
char iotype;
u8 reg_off;
};
static const struct lpuart_soc_data vf_data = {
.iotype = UPIO_MEM,
};
static const struct lpuart_soc_data ls_data = {
.iotype = UPIO_MEM32BE,
};
static struct lpuart_soc_data imx_data = {
.iotype = UPIO_MEM32,
.reg_off = IMX_REG_OFF,
};
static const struct of_device_id lpuart_dt_ids[] = {
{
.compatible = "fsl,vf610-lpuart",
},
{
.compatible = "fsl,ls1021a-lpuart",
},
{ .compatible = "fsl,vf610-lpuart", .data = &vf_data, },
{ .compatible = "fsl,ls1021a-lpuart", .data = &ls_data, },
{ .compatible = "fsl,imx7ulp-lpuart", .data = &imx_data, },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, lpuart_dt_ids);
@ -272,14 +291,29 @@ MODULE_DEVICE_TABLE(of, lpuart_dt_ids);
/* Forward declare this for the dma callbacks*/
static void lpuart_dma_tx_complete(void *arg);
static u32 lpuart32_read(void __iomem *addr)
static inline u32 lpuart32_read(struct uart_port *port, u32 off)
{
return ioread32be(addr);
switch (port->iotype) {
case UPIO_MEM32:
return readl(port->membase + off);
case UPIO_MEM32BE:
return ioread32be(port->membase + off);
default:
return 0;
}
}
static void lpuart32_write(u32 val, void __iomem *addr)
static inline void lpuart32_write(struct uart_port *port, u32 val,
u32 off)
{
iowrite32be(val, addr);
switch (port->iotype) {
case UPIO_MEM32:
writel(val, port->membase + off);
break;
case UPIO_MEM32BE:
iowrite32be(val, port->membase + off);
break;
}
}
static void lpuart_stop_tx(struct uart_port *port)
@ -295,9 +329,9 @@ static void lpuart32_stop_tx(struct uart_port *port)
{
unsigned long temp;
temp = lpuart32_read(port->membase + UARTCTRL);
temp = lpuart32_read(port, UARTCTRL);
temp &= ~(UARTCTRL_TIE | UARTCTRL_TCIE);
lpuart32_write(temp, port->membase + UARTCTRL);
lpuart32_write(port, temp, UARTCTRL);
}
static void lpuart_stop_rx(struct uart_port *port)
@ -312,8 +346,8 @@ static void lpuart32_stop_rx(struct uart_port *port)
{
unsigned long temp;
temp = lpuart32_read(port->membase + UARTCTRL);
lpuart32_write(temp & ~UARTCTRL_RE, port->membase + UARTCTRL);
temp = lpuart32_read(port, UARTCTRL);
lpuart32_write(port, temp & ~UARTCTRL_RE, UARTCTRL);
}
static void lpuart_dma_tx(struct lpuart_port *sport)
@ -512,14 +546,14 @@ static inline void lpuart32_transmit_buffer(struct lpuart_port *sport)
struct circ_buf *xmit = &sport->port.state->xmit;
unsigned long txcnt;
txcnt = lpuart32_read(sport->port.membase + UARTWATER);
txcnt = lpuart32_read(&sport->port, UARTWATER);
txcnt = txcnt >> UARTWATER_TXCNT_OFF;
txcnt &= UARTWATER_COUNT_MASK;
while (!uart_circ_empty(xmit) && (txcnt < sport->txfifo_size)) {
lpuart32_write(xmit->buf[xmit->tail], sport->port.membase + UARTDATA);
lpuart32_write(&sport->port, xmit->buf[xmit->tail], UARTDATA);
xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
sport->port.icount.tx++;
txcnt = lpuart32_read(sport->port.membase + UARTWATER);
txcnt = lpuart32_read(&sport->port, UARTWATER);
txcnt = txcnt >> UARTWATER_TXCNT_OFF;
txcnt &= UARTWATER_COUNT_MASK;
}
@ -555,10 +589,10 @@ static void lpuart32_start_tx(struct uart_port *port)
struct lpuart_port *sport = container_of(port, struct lpuart_port, port);
unsigned long temp;
temp = lpuart32_read(port->membase + UARTCTRL);
lpuart32_write(temp | UARTCTRL_TIE, port->membase + UARTCTRL);
temp = lpuart32_read(port, UARTCTRL);
lpuart32_write(port, temp | UARTCTRL_TIE, UARTCTRL);
if (lpuart32_read(port->membase + UARTSTAT) & UARTSTAT_TDRE)
if (lpuart32_read(port, UARTSTAT) & UARTSTAT_TDRE)
lpuart32_transmit_buffer(sport);
}
@ -581,7 +615,7 @@ static unsigned int lpuart_tx_empty(struct uart_port *port)
static unsigned int lpuart32_tx_empty(struct uart_port *port)
{
return (lpuart32_read(port->membase + UARTSTAT) & UARTSTAT_TC) ?
return (lpuart32_read(port, UARTSTAT) & UARTSTAT_TC) ?
TIOCSER_TEMT : 0;
}
@ -593,22 +627,22 @@ static irqreturn_t lpuart_txint(int irq, void *dev_id)
spin_lock_irqsave(&sport->port.lock, flags);
if (sport->port.x_char) {
if (sport->lpuart32)
lpuart32_write(sport->port.x_char, sport->port.membase + UARTDATA);
if (sport->port.iotype & (UPIO_MEM32 | UPIO_MEM32BE))
lpuart32_write(&sport->port, sport->port.x_char, UARTDATA);
else
writeb(sport->port.x_char, sport->port.membase + UARTDR);
goto out;
}
if (uart_circ_empty(xmit) || uart_tx_stopped(&sport->port)) {
if (sport->lpuart32)
if (sport->port.iotype & (UPIO_MEM32 | UPIO_MEM32BE))
lpuart32_stop_tx(&sport->port);
else
lpuart_stop_tx(&sport->port);
goto out;
}
if (sport->lpuart32)
if (sport->port.iotype & (UPIO_MEM32 | UPIO_MEM32BE))
lpuart32_transmit_buffer(sport);
else
lpuart_transmit_buffer(sport);
@ -694,15 +728,15 @@ static irqreturn_t lpuart32_rxint(int irq, void *dev_id)
spin_lock_irqsave(&sport->port.lock, flags);
while (!(lpuart32_read(sport->port.membase + UARTFIFO) & UARTFIFO_RXEMPT)) {
while (!(lpuart32_read(&sport->port, UARTFIFO) & UARTFIFO_RXEMPT)) {
flg = TTY_NORMAL;
sport->port.icount.rx++;
/*
* to clear the FE, OR, NF, FE, PE flags,
* read STAT then read DATA reg
*/
sr = lpuart32_read(sport->port.membase + UARTSTAT);
rx = lpuart32_read(sport->port.membase + UARTDATA);
sr = lpuart32_read(&sport->port, UARTSTAT);
rx = lpuart32_read(&sport->port, UARTDATA);
rx &= 0x3ff;
if (uart_handle_sysrq_char(&sport->port, (unsigned char)rx))
@ -769,18 +803,18 @@ static irqreturn_t lpuart32_int(int irq, void *dev_id)
struct lpuart_port *sport = dev_id;
unsigned long sts, rxcount;
sts = lpuart32_read(sport->port.membase + UARTSTAT);
rxcount = lpuart32_read(sport->port.membase + UARTWATER);
sts = lpuart32_read(&sport->port, UARTSTAT);
rxcount = lpuart32_read(&sport->port, UARTWATER);
rxcount = rxcount >> UARTWATER_RXCNT_OFF;
if (sts & UARTSTAT_RDRF || rxcount > 0)
lpuart32_rxint(irq, dev_id);
if ((sts & UARTSTAT_TDRE) &&
!(lpuart32_read(sport->port.membase + UARTBAUD) & UARTBAUD_TDMAE))
!(lpuart32_read(&sport->port, UARTBAUD) & UARTBAUD_TDMAE))
lpuart_txint(irq, dev_id);
lpuart32_write(sts, sport->port.membase + UARTSTAT);
lpuart32_write(&sport->port, sts, UARTSTAT);
return IRQ_HANDLED;
}
@ -1041,7 +1075,7 @@ static unsigned int lpuart32_get_mctrl(struct uart_port *port)
unsigned int temp = 0;
unsigned long reg;
reg = lpuart32_read(port->membase + UARTMODIR);
reg = lpuart32_read(port, UARTMODIR);
if (reg & UARTMODIR_TXCTSE)
temp |= TIOCM_CTS;
@ -1076,7 +1110,7 @@ static void lpuart32_set_mctrl(struct uart_port *port, unsigned int mctrl)
{
unsigned long temp;
temp = lpuart32_read(port->membase + UARTMODIR) &
temp = lpuart32_read(port, UARTMODIR) &
~(UARTMODIR_RXRTSE | UARTMODIR_TXCTSE);
if (mctrl & TIOCM_RTS)
@ -1085,7 +1119,7 @@ static void lpuart32_set_mctrl(struct uart_port *port, unsigned int mctrl)
if (mctrl & TIOCM_CTS)
temp |= UARTMODIR_TXCTSE;
lpuart32_write(temp, port->membase + UARTMODIR);
lpuart32_write(port, temp, UARTMODIR);
}
static void lpuart_break_ctl(struct uart_port *port, int break_state)
@ -1104,12 +1138,12 @@ static void lpuart32_break_ctl(struct uart_port *port, int break_state)
{
unsigned long temp;
temp = lpuart32_read(port->membase + UARTCTRL) & ~UARTCTRL_SBK;
temp = lpuart32_read(port, UARTCTRL) & ~UARTCTRL_SBK;
if (break_state != 0)
temp |= UARTCTRL_SBK;
lpuart32_write(temp, port->membase + UARTCTRL);
lpuart32_write(port, temp, UARTCTRL);
}
static void lpuart_setup_watermark(struct lpuart_port *sport)
@ -1149,24 +1183,24 @@ static void lpuart32_setup_watermark(struct lpuart_port *sport)
unsigned long val, ctrl;
unsigned long ctrl_saved;
ctrl = lpuart32_read(sport->port.membase + UARTCTRL);
ctrl = lpuart32_read(&sport->port, UARTCTRL);
ctrl_saved = ctrl;
ctrl &= ~(UARTCTRL_TIE | UARTCTRL_TCIE | UARTCTRL_TE |
UARTCTRL_RIE | UARTCTRL_RE);
lpuart32_write(ctrl, sport->port.membase + UARTCTRL);
lpuart32_write(&sport->port, ctrl, UARTCTRL);
/* enable FIFO mode */
val = lpuart32_read(sport->port.membase + UARTFIFO);
val = lpuart32_read(&sport->port, UARTFIFO);
val |= UARTFIFO_TXFE | UARTFIFO_RXFE;
val |= UARTFIFO_TXFLUSH | UARTFIFO_RXFLUSH;
lpuart32_write(val, sport->port.membase + UARTFIFO);
lpuart32_write(&sport->port, val, UARTFIFO);
/* set the watermark */
val = (0x1 << UARTWATER_RXWATER_OFF) | (0x0 << UARTWATER_TXWATER_OFF);
lpuart32_write(val, sport->port.membase + UARTWATER);
lpuart32_write(&sport->port, val, UARTWATER);
/* Restore cr2 */
lpuart32_write(ctrl_saved, sport->port.membase + UARTCTRL);
lpuart32_write(&sport->port, ctrl_saved, UARTCTRL);
}
static void rx_dma_timer_init(struct lpuart_port *sport)
@ -1242,7 +1276,7 @@ static int lpuart32_startup(struct uart_port *port)
unsigned long temp;
/* determine FIFO size */
temp = lpuart32_read(sport->port.membase + UARTFIFO);
temp = lpuart32_read(&sport->port, UARTFIFO);
sport->txfifo_size = 0x1 << (((temp >> UARTFIFO_TXSIZE_OFF) &
UARTFIFO_FIFOSIZE_MASK) - 1);
@ -1259,10 +1293,10 @@ static int lpuart32_startup(struct uart_port *port)
lpuart32_setup_watermark(sport);
temp = lpuart32_read(sport->port.membase + UARTCTRL);
temp = lpuart32_read(&sport->port, UARTCTRL);
temp |= (UARTCTRL_RIE | UARTCTRL_TIE | UARTCTRL_RE | UARTCTRL_TE);
temp |= UARTCTRL_ILIE;
lpuart32_write(temp, sport->port.membase + UARTCTRL);
lpuart32_write(&sport->port, temp, UARTCTRL);
spin_unlock_irqrestore(&sport->port.lock, flags);
return 0;
@ -1311,10 +1345,10 @@ static void lpuart32_shutdown(struct uart_port *port)
spin_lock_irqsave(&port->lock, flags);
/* disable Rx/Tx and interrupts */
temp = lpuart32_read(port->membase + UARTCTRL);
temp = lpuart32_read(port, UARTCTRL);
temp &= ~(UARTCTRL_TE | UARTCTRL_RE |
UARTCTRL_TIE | UARTCTRL_TCIE | UARTCTRL_RIE);
lpuart32_write(temp, port->membase + UARTCTRL);
lpuart32_write(port, temp, UARTCTRL);
spin_unlock_irqrestore(&port->lock, flags);
@ -1478,6 +1512,75 @@ lpuart_set_termios(struct uart_port *port, struct ktermios *termios,
spin_unlock_irqrestore(&sport->port.lock, flags);
}
static void
lpuart32_serial_setbrg(struct lpuart_port *sport, unsigned int baudrate)
{
u32 sbr, osr, baud_diff, tmp_osr, tmp_sbr, tmp_diff, tmp;
u32 clk = sport->port.uartclk;
/*
* The idea is to use the best OSR (over-sampling rate) possible.
* Note, OSR is typically hard-set to 16 in other LPUART instantiations.
* Loop to find the best OSR value possible, one that generates minimum
* baud_diff iterate through the rest of the supported values of OSR.
*
* Calculation Formula:
* Baud Rate = baud clock / ((OSR+1) × SBR)
*/
baud_diff = baudrate;
osr = 0;
sbr = 0;
for (tmp_osr = 4; tmp_osr <= 32; tmp_osr++) {
/* calculate the temporary sbr value */
tmp_sbr = (clk / (baudrate * tmp_osr));
if (tmp_sbr == 0)
tmp_sbr = 1;
/*
* calculate the baud rate difference based on the temporary
* osr and sbr values
*/
tmp_diff = clk / (tmp_osr * tmp_sbr) - baudrate;
/* select best values between sbr and sbr+1 */
tmp = clk / (tmp_osr * (tmp_sbr + 1));
if (tmp_diff > (baudrate - tmp)) {
tmp_diff = baudrate - tmp;
tmp_sbr++;
}
if (tmp_diff <= baud_diff) {
baud_diff = tmp_diff;
osr = tmp_osr;
sbr = tmp_sbr;
if (!baud_diff)
break;
}
}
/* handle buadrate outside acceptable rate */
if (baud_diff > ((baudrate / 100) * 3))
dev_warn(sport->port.dev,
"unacceptable baud rate difference of more than 3%%\n");
tmp = lpuart32_read(&sport->port, UARTBAUD);
if ((osr > 3) && (osr < 8))
tmp |= UARTBAUD_BOTHEDGE;
tmp &= ~(UARTBAUD_OSR_MASK << UARTBAUD_OSR_SHIFT);
tmp |= (((osr-1) & UARTBAUD_OSR_MASK) << UARTBAUD_OSR_SHIFT);
tmp &= ~UARTBAUD_SBR_MASK;
tmp |= sbr & UARTBAUD_SBR_MASK;
tmp &= ~(UARTBAUD_TDMAE | UARTBAUD_RDMAE);
lpuart32_write(&sport->port, tmp, UARTBAUD);
}
static void
lpuart32_set_termios(struct uart_port *port, struct ktermios *termios,
struct ktermios *old)
@ -1487,11 +1590,10 @@ lpuart32_set_termios(struct uart_port *port, struct ktermios *termios,
unsigned long ctrl, old_ctrl, bd, modem;
unsigned int baud;
unsigned int old_csize = old ? old->c_cflag & CSIZE : CS8;
unsigned int sbr;
ctrl = old_ctrl = lpuart32_read(sport->port.membase + UARTCTRL);
bd = lpuart32_read(sport->port.membase + UARTBAUD);
modem = lpuart32_read(sport->port.membase + UARTMODIR);
ctrl = old_ctrl = lpuart32_read(&sport->port, UARTCTRL);
bd = lpuart32_read(&sport->port, UARTBAUD);
modem = lpuart32_read(&sport->port, UARTMODIR);
/*
* only support CS8 and CS7, and for CS7 must enable PE.
* supported mode:
@ -1577,21 +1679,16 @@ lpuart32_set_termios(struct uart_port *port, struct ktermios *termios,
uart_update_timeout(port, termios->c_cflag, baud);
/* wait transmit engin complete */
while (!(lpuart32_read(sport->port.membase + UARTSTAT) & UARTSTAT_TC))
while (!(lpuart32_read(&sport->port, UARTSTAT) & UARTSTAT_TC))
barrier();
/* disable transmit and receive */
lpuart32_write(old_ctrl & ~(UARTCTRL_TE | UARTCTRL_RE),
sport->port.membase + UARTCTRL);
lpuart32_write(&sport->port, old_ctrl & ~(UARTCTRL_TE | UARTCTRL_RE),
UARTCTRL);
sbr = sport->port.uartclk / (16 * baud);
bd &= ~UARTBAUD_SBR_MASK;
bd |= sbr & UARTBAUD_SBR_MASK;
bd |= UARTBAUD_BOTHEDGE;
bd &= ~(UARTBAUD_TDMAE | UARTBAUD_RDMAE);
lpuart32_write(bd, sport->port.membase + UARTBAUD);
lpuart32_write(modem, sport->port.membase + UARTMODIR);
lpuart32_write(ctrl, sport->port.membase + UARTCTRL);
lpuart32_serial_setbrg(sport, baud);
lpuart32_write(&sport->port, modem, UARTMODIR);
lpuart32_write(&sport->port, ctrl, UARTCTRL);
/* restore control register */
spin_unlock_irqrestore(&sport->port.lock, flags);
@ -1694,10 +1791,10 @@ static void lpuart_console_putchar(struct uart_port *port, int ch)
static void lpuart32_console_putchar(struct uart_port *port, int ch)
{
while (!(lpuart32_read(port->membase + UARTSTAT) & UARTSTAT_TDRE))
while (!(lpuart32_read(port, UARTSTAT) & UARTSTAT_TDRE))
barrier();
lpuart32_write(ch, port->membase + UARTDATA);
lpuart32_write(port, ch, UARTDATA);
}
static void
@ -1745,18 +1842,18 @@ lpuart32_console_write(struct console *co, const char *s, unsigned int count)
spin_lock_irqsave(&sport->port.lock, flags);
/* first save CR2 and then disable interrupts */
cr = old_cr = lpuart32_read(sport->port.membase + UARTCTRL);
cr = old_cr = lpuart32_read(&sport->port, UARTCTRL);
cr |= (UARTCTRL_TE | UARTCTRL_RE);
cr &= ~(UARTCTRL_TIE | UARTCTRL_TCIE | UARTCTRL_RIE);
lpuart32_write(cr, sport->port.membase + UARTCTRL);
lpuart32_write(&sport->port, cr, UARTCTRL);
uart_console_write(&sport->port, s, count, lpuart32_console_putchar);
/* wait for transmitter finish complete and restore CR2 */
while (!(lpuart32_read(sport->port.membase + UARTSTAT) & UARTSTAT_TC))
while (!(lpuart32_read(&sport->port, UARTSTAT) & UARTSTAT_TC))
barrier();
lpuart32_write(old_cr, sport->port.membase + UARTCTRL);
lpuart32_write(&sport->port, old_cr, UARTCTRL);
if (locked)
spin_unlock_irqrestore(&sport->port.lock, flags);
@ -1822,14 +1919,14 @@ lpuart32_console_get_options(struct lpuart_port *sport, int *baud,
unsigned long cr, bd;
unsigned int sbr, uartclk, baud_raw;
cr = lpuart32_read(sport->port.membase + UARTCTRL);
cr = lpuart32_read(&sport->port, UARTCTRL);
cr &= UARTCTRL_TE | UARTCTRL_RE;
if (!cr)
return;
/* ok, the port was enabled */
cr = lpuart32_read(sport->port.membase + UARTCTRL);
cr = lpuart32_read(&sport->port, UARTCTRL);
*parity = 'n';
if (cr & UARTCTRL_PE) {
@ -1844,7 +1941,7 @@ lpuart32_console_get_options(struct lpuart_port *sport, int *baud,
else
*bits = 8;
bd = lpuart32_read(sport->port.membase + UARTBAUD);
bd = lpuart32_read(&sport->port, UARTBAUD);
bd &= UARTBAUD_SBR_MASK;
sbr = bd;
uartclk = clk_get_rate(sport->clk);
@ -1881,12 +1978,12 @@ static int __init lpuart_console_setup(struct console *co, char *options)
if (options)
uart_parse_options(options, &baud, &parity, &bits, &flow);
else
if (sport->lpuart32)
if (sport->port.iotype & (UPIO_MEM32 | UPIO_MEM32BE))
lpuart32_console_get_options(sport, &baud, &parity, &bits);
else
lpuart_console_get_options(sport, &baud, &parity, &bits);
if (sport->lpuart32)
if (sport->port.iotype & (UPIO_MEM32 | UPIO_MEM32BE))
lpuart32_setup_watermark(sport);
else
lpuart_setup_watermark(sport);
@ -1945,12 +2042,26 @@ static int __init lpuart32_early_console_setup(struct earlycon_device *device,
if (!device->port.membase)
return -ENODEV;
device->port.iotype = UPIO_MEM32BE;
device->con->write = lpuart32_early_write;
return 0;
}
static int __init lpuart32_imx_early_console_setup(struct earlycon_device *device,
const char *opt)
{
if (!device->port.membase)
return -ENODEV;
device->port.iotype = UPIO_MEM32;
device->port.membase += IMX_REG_OFF;
device->con->write = lpuart32_early_write;
return 0;
}
OF_EARLYCON_DECLARE(lpuart, "fsl,vf610-lpuart", lpuart_early_console_setup);
OF_EARLYCON_DECLARE(lpuart32, "fsl,ls1021a-lpuart", lpuart32_early_console_setup);
OF_EARLYCON_DECLARE(lpuart32, "fsl,imx7ulp-lpuart", lpuart32_imx_early_console_setup);
EARLYCON_DECLARE(lpuart, lpuart_early_console_setup);
EARLYCON_DECLARE(lpuart32, lpuart32_early_console_setup);
@ -1971,6 +2082,9 @@ static struct uart_driver lpuart_reg = {
static int lpuart_probe(struct platform_device *pdev)
{
const struct of_device_id *of_id = of_match_device(lpuart_dt_ids,
&pdev->dev);
const struct lpuart_soc_data *sdata = of_id->data;
struct device_node *np = pdev->dev.of_node;
struct lpuart_port *sport;
struct resource *res;
@ -1988,25 +2102,23 @@ static int lpuart_probe(struct platform_device *pdev)
return ret;
}
sport->port.line = ret;
sport->lpuart32 = of_device_is_compatible(np, "fsl,ls1021a-lpuart");
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
sport->port.membase = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(sport->port.membase))
return PTR_ERR(sport->port.membase);
sport->port.membase += sdata->reg_off;
sport->port.mapbase = res->start;
sport->port.dev = &pdev->dev;
sport->port.type = PORT_LPUART;
sport->port.iotype = UPIO_MEM;
ret = platform_get_irq(pdev, 0);
if (ret < 0) {
dev_err(&pdev->dev, "cannot obtain irq\n");
return ret;
}
sport->port.irq = ret;
if (sport->lpuart32)
sport->port.iotype = sdata->iotype;
if (sport->port.iotype & (UPIO_MEM32 | UPIO_MEM32BE))
sport->port.ops = &lpuart32_pops;
else
sport->port.ops = &lpuart_pops;
@ -2033,7 +2145,7 @@ static int lpuart_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, &sport->port);
if (sport->lpuart32)
if (sport->port.iotype & (UPIO_MEM32 | UPIO_MEM32BE))
lpuart_reg.cons = LPUART32_CONSOLE;
else
lpuart_reg.cons = LPUART_CONSOLE;
@ -2086,11 +2198,11 @@ static int lpuart_suspend(struct device *dev)
struct lpuart_port *sport = dev_get_drvdata(dev);
unsigned long temp;
if (sport->lpuart32) {
if (sport->port.iotype & (UPIO_MEM32 | UPIO_MEM32BE)) {
/* disable Rx/Tx and interrupts */
temp = lpuart32_read(sport->port.membase + UARTCTRL);
temp = lpuart32_read(&sport->port, UARTCTRL);
temp &= ~(UARTCTRL_TE | UARTCTRL_TIE | UARTCTRL_TCIE);
lpuart32_write(temp, sport->port.membase + UARTCTRL);
lpuart32_write(&sport->port, temp, UARTCTRL);
} else {
/* disable Rx/Tx and interrupts */
temp = readb(sport->port.membase + UARTCR2);
@ -2137,12 +2249,12 @@ static int lpuart_resume(struct device *dev)
if (sport->port.suspended && !sport->port.irq_wake)
clk_prepare_enable(sport->clk);
if (sport->lpuart32) {
if (sport->port.iotype & (UPIO_MEM32 | UPIO_MEM32BE)) {
lpuart32_setup_watermark(sport);
temp = lpuart32_read(sport->port.membase + UARTCTRL);
temp = lpuart32_read(&sport->port, UARTCTRL);
temp |= (UARTCTRL_RIE | UARTCTRL_TIE | UARTCTRL_RE |
UARTCTRL_TE | UARTCTRL_ILIE);
lpuart32_write(temp, sport->port.membase + UARTCTRL);
lpuart32_write(&sport->port, temp, UARTCTRL);
} else {
lpuart_setup_watermark(sport);
temp = readb(sport->port.membase + UARTCR2);

58
drivers/tty/serial/imx.c
View File

@ -186,6 +186,11 @@
#define UART_NR 8
/* RX DMA buffer periods */
#define RX_DMA_PERIODS 4
#define RX_BUF_SIZE (PAGE_SIZE)
/* i.MX21 type uart runs on all i.mx except i.MX1 and i.MX6q */
enum imx_uart_type {
IMX1_UART,
@ -207,9 +212,6 @@ struct imx_port {
unsigned int have_rtscts:1;
unsigned int have_rtsgpio:1;
unsigned int dte_mode:1;
unsigned int irda_inv_rx:1;
unsigned int irda_inv_tx:1;
unsigned short trcv_delay; /* transceiver delay */
struct clk *clk_ipg;
struct clk *clk_per;
const struct imx_uart_data *devdata;
@ -224,6 +226,7 @@ struct imx_port {
struct dma_chan *dma_chan_rx, *dma_chan_tx;
struct scatterlist rx_sgl, tx_sgl[2];
void *rx_buf;
unsigned int rx_buf_size;
struct circ_buf rx_ring;
unsigned int rx_periods;
dma_cookie_t rx_cookie;
@ -964,8 +967,6 @@ static void imx_timeout(unsigned long data)
}
}
#define RX_BUF_SIZE (PAGE_SIZE)
/*
* There are two kinds of RX DMA interrupts(such as in the MX6Q):
* [1] the RX DMA buffer is full.
@ -1048,9 +1049,6 @@ static void dma_rx_callback(void *data)
}
}
/* RX DMA buffer periods */
#define RX_DMA_PERIODS 4
static int start_rx_dma(struct imx_port *sport)
{
struct scatterlist *sgl = &sport->rx_sgl;
@ -1061,9 +1059,8 @@ static int start_rx_dma(struct imx_port *sport)
sport->rx_ring.head = 0;
sport->rx_ring.tail = 0;
sport->rx_periods = RX_DMA_PERIODS;
sg_init_one(sgl, sport->rx_buf, RX_BUF_SIZE);
sg_init_one(sgl, sport->rx_buf, sport->rx_buf_size);
ret = dma_map_sg(dev, sgl, 1, DMA_FROM_DEVICE);
if (ret == 0) {
dev_err(dev, "DMA mapping error for RX.\n");
@ -1174,7 +1171,7 @@ static int imx_uart_dma_init(struct imx_port *sport)
goto err;
}
sport->rx_buf = kzalloc(PAGE_SIZE, GFP_KERNEL);
sport->rx_buf = kzalloc(sport->rx_buf_size, GFP_KERNEL);
if (!sport->rx_buf) {
ret = -ENOMEM;
goto err;
@ -1302,7 +1299,9 @@ static int imx_startup(struct uart_port *port)
imx_enable_dma(sport);
temp = readl(sport->port.membase + UCR1);
temp |= UCR1_RRDYEN | UCR1_RTSDEN | UCR1_UARTEN;
temp |= UCR1_RRDYEN | UCR1_UARTEN;
if (sport->have_rtscts)
temp |= UCR1_RTSDEN;
writel(temp, sport->port.membase + UCR1);
@ -1340,29 +1339,13 @@ static int imx_startup(struct uart_port *port)
imx_enable_ms(&sport->port);
/*
* If the serial port is opened for reading start RX DMA immediately
* instead of waiting for RX FIFO interrupts. In our iMX53 the average
* delay for the first reception dropped from approximately 35000
* microseconds to 1000 microseconds.
* Start RX DMA immediately instead of waiting for RX FIFO interrupts.
* In our iMX53 the average delay for the first reception dropped from
* approximately 35000 microseconds to 1000 microseconds.
*/
if (sport->dma_is_enabled) {
struct tty_struct *tty = sport->port.state->port.tty;
struct tty_file_private *file_priv;
int readcnt = 0;
spin_lock(&tty->files_lock);
if (!list_empty(&tty->tty_files))
list_for_each_entry(file_priv, &tty->tty_files, list)
if (!(file_priv->file->f_flags & O_WRONLY))
readcnt++;
spin_unlock(&tty->files_lock);
if (readcnt > 0) {
imx_disable_rx_int(sport);
start_rx_dma(sport);
}
imx_disable_rx_int(sport);
start_rx_dma(sport);
}
spin_unlock_irqrestore(&sport->port.lock, flags);
@ -2053,6 +2036,7 @@ static int serial_imx_probe_dt(struct imx_port *sport,
{
struct device_node *np = pdev->dev.of_node;
int ret;
u32 dma_buf_size[2];
sport->devdata = of_device_get_match_data(&pdev->dev);
if (!sport->devdata)
@ -2076,6 +2060,14 @@ static int serial_imx_probe_dt(struct imx_port *sport,
if (of_get_property(np, "rts-gpios", NULL))
sport->have_rtsgpio = 1;
if (!of_property_read_u32_array(np, "fsl,dma-size", dma_buf_size, 2)) {
sport->rx_buf_size = dma_buf_size[0] * dma_buf_size[1];
sport->rx_periods = dma_buf_size[1];
} else {
sport->rx_buf_size = RX_BUF_SIZE;
sport->rx_periods = RX_DMA_PERIODS;
}
return 0;
}
#else

153
drivers/tty/serial/meson_uart.c
View File

@ -286,7 +286,7 @@ static int meson_uart_startup(struct uart_port *port)
writel(val, port->membase + AML_UART_MISC);
ret = request_irq(port->irq, meson_uart_interrupt, 0,
meson_uart_type(port), port);
port->name, port);
return ret;
}
@ -298,8 +298,6 @@ static void meson_uart_change_speed(struct uart_port *port, unsigned long baud)
while (!meson_uart_tx_empty(port))
cpu_relax();
val = readl(port->membase + AML_UART_REG5);
val &= ~AML_UART_BAUD_MASK;
if (port->uartclk == 24000000) {
val = ((port->uartclk / 3) / baud) - 1;
val |= AML_UART_BAUD_XTAL;
@ -355,7 +353,7 @@ static void meson_uart_set_termios(struct uart_port *port,
if (cflags & CSTOPB)
val |= AML_UART_STOP_BIN_2SB;
else
val &= ~AML_UART_STOP_BIN_1SB;
val |= AML_UART_STOP_BIN_1SB;
if (cflags & CRTSCTS)
val &= ~AML_UART_TWO_WIRE_EN;
@ -395,51 +393,25 @@ static int meson_uart_verify_port(struct uart_port *port,
return ret;
}
static int meson_uart_res_size(struct uart_port *port)
{
struct platform_device *pdev = to_platform_device(port->dev);
struct resource *res;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res) {
dev_err(port->dev, "cannot obtain I/O memory region");
return -ENODEV;
}
return resource_size(res);
}
static void meson_uart_release_port(struct uart_port *port)
{
int size = meson_uart_res_size(port);
if (port->flags & UPF_IOREMAP) {
devm_release_mem_region(port->dev, port->mapbase, size);
devm_iounmap(port->dev, port->membase);
port->membase = NULL;
}
devm_iounmap(port->dev, port->membase);
port->membase = NULL;
devm_release_mem_region(port->dev, port->mapbase, port->mapsize);
}
static int meson_uart_request_port(struct uart_port *port)
{
int size = meson_uart_res_size(port);
if (size < 0)
return size;
if (!devm_request_mem_region(port->dev, port->mapbase, size,
if (!devm_request_mem_region(port->dev, port->mapbase, port->mapsize,
dev_name(port->dev))) {
dev_err(port->dev, "Memory region busy\n");
return -EBUSY;
}
if (port->flags & UPF_IOREMAP) {
port->membase = devm_ioremap_nocache(port->dev,
port->mapbase,
size);
if (port->membase == NULL)
return -ENOMEM;
}
port->membase = devm_ioremap_nocache(port->dev, port->mapbase,
port->mapsize);
if (!port->membase)
return -ENOMEM;
return 0;
}
@ -470,6 +442,14 @@ static struct uart_ops meson_uart_ops = {
};
#ifdef CONFIG_SERIAL_MESON_CONSOLE
static void meson_uart_enable_tx_engine(struct uart_port *port)
{
u32 val;
val = readl(port->membase + AML_UART_CONTROL);
val |= AML_UART_TX_EN;
writel(val, port->membase + AML_UART_CONTROL);
}
static void meson_console_putchar(struct uart_port *port, int ch)
{
@ -499,7 +479,6 @@ static void meson_serial_port_write(struct uart_port *port, const char *s,
}
val = readl(port->membase + AML_UART_CONTROL);
val |= AML_UART_TX_EN;
tmp = val & ~(AML_UART_TX_INT_EN | AML_UART_RX_INT_EN);
writel(tmp, port->membase + AML_UART_CONTROL);
@ -538,6 +517,8 @@ static int meson_serial_console_setup(struct console *co, char *options)
if (!port || !port->membase)
return -ENODEV;
meson_uart_enable_tx_engine(port);
if (options)
uart_parse_options(options, &baud, &parity, &bits, &flow);
@ -576,11 +557,16 @@ meson_serial_early_console_setup(struct earlycon_device *device, const char *opt
if (!device->port.membase)
return -ENODEV;
meson_uart_enable_tx_engine(&device->port);
device->con->write = meson_serial_early_console_write;
return 0;
}
/* Legacy bindings, should be removed when no more used */
OF_EARLYCON_DECLARE(meson, "amlogic,meson-uart",
meson_serial_early_console_setup);
/* Stable bindings */
OF_EARLYCON_DECLARE(meson, "amlogic,meson-ao-uart",
meson_serial_early_console_setup);
#define MESON_SERIAL_CONSOLE (&meson_serial_console)
#else
@ -595,11 +581,76 @@ static struct uart_driver meson_uart_driver = {
.cons = MESON_SERIAL_CONSOLE,
};
static inline struct clk *meson_uart_probe_clock(struct device *dev,
const char *id)
{
struct clk *clk = NULL;
int ret;
clk = devm_clk_get(dev, id);
if (IS_ERR(clk))
return clk;
ret = clk_prepare_enable(clk);
if (ret) {
dev_err(dev, "couldn't enable clk\n");
return ERR_PTR(ret);
}
devm_add_action_or_reset(dev,
(void(*)(void *))clk_disable_unprepare,
clk);
return clk;
}
/*
* This function gets clocks in the legacy non-stable DT bindings.
* This code will be remove once all the platforms switch to the
* new DT bindings.
*/
static int meson_uart_probe_clocks_legacy(struct platform_device *pdev,
struct uart_port *port)
{
struct clk *clk = NULL;
clk = meson_uart_probe_clock(&pdev->dev, NULL);
if (IS_ERR(clk))
return PTR_ERR(clk);
port->uartclk = clk_get_rate(clk);
return 0;
}
static int meson_uart_probe_clocks(struct platform_device *pdev,
struct uart_port *port)
{
struct clk *clk_xtal = NULL;
struct clk *clk_pclk = NULL;
struct clk *clk_baud = NULL;
clk_pclk = meson_uart_probe_clock(&pdev->dev, "pclk");
if (IS_ERR(clk_pclk))
return PTR_ERR(clk_pclk);
clk_xtal = meson_uart_probe_clock(&pdev->dev, "xtal");
if (IS_ERR(clk_xtal))
return PTR_ERR(clk_xtal);
clk_baud = meson_uart_probe_clock(&pdev->dev, "baud");
if (IS_ERR(clk_baud))
return PTR_ERR(clk_baud);
port->uartclk = clk_get_rate(clk_baud);
return 0;
}
static int meson_uart_probe(struct platform_device *pdev)
{
struct resource *res_mem, *res_irq;
struct uart_port *port;
struct clk *clk;
int ret = 0;
if (pdev->dev.of_node)
@ -625,15 +676,20 @@ static int meson_uart_probe(struct platform_device *pdev)
if (!port)
return -ENOMEM;
clk = clk_get(&pdev->dev, NULL);
if (IS_ERR(clk))
return PTR_ERR(clk);
/* Use legacy way until all platforms switch to new bindings */
if (of_device_is_compatible(pdev->dev.of_node, "amlogic,meson-uart"))
ret = meson_uart_probe_clocks_legacy(pdev, port);
else
ret = meson_uart_probe_clocks(pdev, port);
if (ret)
return ret;
port->uartclk = clk_get_rate(clk);
port->iotype = UPIO_MEM;
port->mapbase = res_mem->start;
port->mapsize = resource_size(res_mem);
port->irq = res_irq->start;
port->flags = UPF_BOOT_AUTOCONF | UPF_IOREMAP | UPF_LOW_LATENCY;
port->flags = UPF_BOOT_AUTOCONF | UPF_LOW_LATENCY;
port->dev = &pdev->dev;
port->line = pdev->id;
port->type = PORT_MESON;
@ -668,9 +724,14 @@ static int meson_uart_remove(struct platform_device *pdev)
return 0;
}
static const struct of_device_id meson_uart_dt_match[] = {
/* Legacy bindings, should be removed when no more used */
{ .compatible = "amlogic,meson-uart" },
/* Stable bindings */
{ .compatible = "amlogic,meson6-uart" },
{ .compatible = "amlogic,meson8-uart" },
{ .compatible = "amlogic,meson8b-uart" },
{ .compatible = "amlogic,meson-gx-uart" },
{ /* sentinel */ },
};
MODULE_DEVICE_TABLE(of, meson_uart_dt_match);

10
drivers/tty/serial/mpsc.c
View File

@ -754,9 +754,10 @@ static int mpsc_alloc_ring_mem(struct mpsc_port_info *pi)
if (!dma_set_mask(pi->port.dev, 0xffffffff)) {
printk(KERN_ERR "MPSC: Inadequate DMA support\n");
rc = -ENXIO;
} else if ((pi->dma_region = dma_alloc_noncoherent(pi->port.dev,
} else if ((pi->dma_region = dma_alloc_attrs(pi->port.dev,
MPSC_DMA_ALLOC_SIZE,
&pi->dma_region_p, GFP_KERNEL))
&pi->dma_region_p, GFP_KERNEL,
DMA_ATTR_NON_CONSISTENT))
== NULL) {
printk(KERN_ERR "MPSC: Can't alloc Desc region\n");
rc = -ENOMEM;
@ -771,8 +772,9 @@ static void mpsc_free_ring_mem(struct mpsc_port_info *pi)
pr_debug("mpsc_free_ring_mem[%d]: Freeing ring mem\n", pi->port.line);
if (pi->dma_region) {
dma_free_noncoherent(pi->port.dev, MPSC_DMA_ALLOC_SIZE,
pi->dma_region, pi->dma_region_p);
dma_free_attrs(pi->port.dev, MPSC_DMA_ALLOC_SIZE,
pi->dma_region, pi->dma_region_p,
DMA_ATTR_NON_CONSISTENT);
pi->dma_region = NULL;
pi->dma_region_p = (dma_addr_t)NULL;
}

135
drivers/tty/serial/owl-uart.c Normal file
View File

@ -0,0 +1,135 @@
/*
* Actions Semi Owl family serial console
*
* Copyright 2013 Actions Semi Inc.
* Author: Actions Semi, Inc.
*
* Copyright (c) 2016-2017 Andreas Färber
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <linux/console.h>
#include <linux/delay.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/serial.h>
#include <linux/serial_core.h>
#define OWL_UART_CTL 0x000
#define OWL_UART_TXDAT 0x008
#define OWL_UART_STAT 0x00c
#define OWL_UART_CTL_TRFS_TX BIT(14)
#define OWL_UART_CTL_EN BIT(15)
#define OWL_UART_CTL_RXIE BIT(18)
#define OWL_UART_CTL_TXIE BIT(19)
#define OWL_UART_STAT_RIP BIT(0)
#define OWL_UART_STAT_TIP BIT(1)
#define OWL_UART_STAT_TFFU BIT(6)
#define OWL_UART_STAT_TRFL_MASK (0x1f << 11)
#define OWL_UART_STAT_UTBB BIT(17)
static inline void owl_uart_write(struct uart_port *port, u32 val, unsigned int off)
{
writel(val, port->membase + off);
}
static inline u32 owl_uart_read(struct uart_port *port, unsigned int off)
{
return readl(port->membase + off);
}
#ifdef CONFIG_SERIAL_OWL_CONSOLE
static void owl_console_putchar(struct uart_port *port, int ch)
{
if (!port->membase)
return;
while (owl_uart_read(port, OWL_UART_STAT) & OWL_UART_STAT_TFFU)
cpu_relax();
owl_uart_write(port, ch, OWL_UART_TXDAT);
}
static void owl_uart_port_write(struct uart_port *port, const char *s,
u_int count)
{
u32 old_ctl, val;
unsigned long flags;
int locked;
local_irq_save(flags);
if (port->sysrq)
locked = 0;
else if (oops_in_progress)
locked = spin_trylock(&port->lock);
else {
spin_lock(&port->lock);
locked = 1;
}
old_ctl = owl_uart_read(port, OWL_UART_CTL);
val = old_ctl | OWL_UART_CTL_TRFS_TX;
/* disable IRQ */
val &= ~(OWL_UART_CTL_RXIE | OWL_UART_CTL_TXIE);
owl_uart_write(port, val, OWL_UART_CTL);
uart_console_write(port, s, count, owl_console_putchar);
/* wait until all contents have been sent out */
while (owl_uart_read(port, OWL_UART_STAT) & OWL_UART_STAT_TRFL_MASK)
cpu_relax();
/* clear IRQ pending */
val = owl_uart_read(port, OWL_UART_STAT);
val |= OWL_UART_STAT_TIP | OWL_UART_STAT_RIP;
owl_uart_write(port, val, OWL_UART_STAT);
owl_uart_write(port, old_ctl, OWL_UART_CTL);
if (locked)
spin_unlock(&port->lock);
local_irq_restore(flags);
}
static void owl_uart_early_console_write(struct console *co,
const char *s,
u_int count)
{
struct earlycon_device *dev = co->data;
owl_uart_port_write(&dev->port, s, count);
}
static int __init
owl_uart_early_console_setup(struct earlycon_device *device, const char *opt)
{
if (!device->port.membase)
return -ENODEV;
device->con->write = owl_uart_early_console_write;
return 0;
}
OF_EARLYCON_DECLARE(owl, "actions,owl-uart",
owl_uart_early_console_setup);
#endif /* CONFIG_SERIAL_OWL_CONSOLE */

3
drivers/tty/serial/pch_uart.c
View File

@ -878,8 +878,7 @@ static int dma_handle_rx(struct eg20t_port *priv)
sg_dma_len(sg) = priv->trigger_level;
sg_set_page(&priv->sg_rx, virt_to_page(priv->rx_buf_virt),
sg_dma_len(sg), (unsigned long)priv->rx_buf_virt &
~PAGE_MASK);
sg_dma_len(sg), offset_in_page(priv->rx_buf_virt));
sg_dma_address(sg) = priv->rx_buf_dma;

15
drivers/tty/serial/sccnxp.c
View File

@ -884,14 +884,19 @@ static int sccnxp_probe(struct platform_device *pdev)
clk = devm_clk_get(&pdev->dev, NULL);
if (IS_ERR(clk)) {
if (PTR_ERR(clk) == -EPROBE_DEFER) {
ret = -EPROBE_DEFER;
ret = PTR_ERR(clk);
if (ret == -EPROBE_DEFER)
goto err_out;
}
uartclk = 0;
} else {
clk_prepare_enable(clk);
uartclk = clk_get_rate(clk);
}
if (!uartclk) {
dev_notice(&pdev->dev, "Using default clock frequency\n");
uartclk = s->chip->freq_std;
} else
uartclk = clk_get_rate(clk);
}
/* Check input frequency */
if ((uartclk < s->chip->freq_min) || (uartclk > s->chip->freq_max)) {

5
drivers/tty/serial/serial_core.c
View File

@ -954,11 +954,10 @@ static int uart_set_info(struct tty_struct *tty, struct tty_port *port,
old_custom_divisor != uport->custom_divisor) {
/*
* If they're setting up a custom divisor or speed,
* instead of clearing it, then bitch about it. No
* need to rate-limit; it's CAP_SYS_ADMIN only.
* instead of clearing it, then bitch about it.
*/
if (uport->flags & UPF_SPD_MASK) {
dev_notice(uport->dev,
dev_notice_ratelimited(uport->dev,
"%s sets custom speed on %s. This is deprecated.\n",
current->comm,
tty_name(port->tty));

45
drivers/tty/serial/sh-sci.c
View File

@ -1450,8 +1450,7 @@ static struct dma_chan *sci_request_dma_chan(struct uart_port *port,
chan = dma_request_slave_channel(port->dev,
dir == DMA_MEM_TO_DEV ? "tx" : "rx");
if (!chan) {
dev_warn(port->dev,
"dma_request_slave_channel_compat failed\n");
dev_warn(port->dev, "dma_request_slave_channel failed\n");
return NULL;
}
@ -1558,7 +1557,16 @@ static void sci_free_dma(struct uart_port *port)
if (s->chan_rx)
sci_rx_dma_release(s, false);
}
#else
static void sci_flush_buffer(struct uart_port *port)
{
/*
* In uart_flush_buffer(), the xmit circular buffer has just been
* cleared, so we have to reset tx_dma_len accordingly.
*/
to_sci_port(port)->tx_dma_len = 0;
}
#else /* !CONFIG_SERIAL_SH_SCI_DMA */
static inline void sci_request_dma(struct uart_port *port)
{
}
@ -1566,7 +1574,9 @@ static inline void sci_request_dma(struct uart_port *port)
static inline void sci_free_dma(struct uart_port *port)
{
}
#endif
#define sci_flush_buffer NULL
#endif /* !CONFIG_SERIAL_SH_SCI_DMA */
static irqreturn_t sci_rx_interrupt(int irq, void *ptr)
{
@ -2581,6 +2591,7 @@ static const struct uart_ops sci_uart_ops = {
.break_ctl = sci_break_ctl,
.startup = sci_startup,
.shutdown = sci_shutdown,
.flush_buffer = sci_flush_buffer,
.set_termios = sci_set_termios,
.pm = sci_pm,
.type = sci_type,
@ -2950,6 +2961,7 @@ static inline int sci_probe_earlyprintk(struct platform_device *pdev)
static const char banner[] __initconst = "SuperH (H)SCI(F) driver initialized";
static DEFINE_MUTEX(sci_uart_registration_lock);
static struct uart_driver sci_uart_driver = {
.owner = THIS_MODULE,
.driver_name = "sci",
@ -3078,6 +3090,16 @@ static int sci_probe_single(struct platform_device *dev,
return -EINVAL;
}
mutex_lock(&sci_uart_registration_lock);
if (!sci_uart_driver.state) {
ret = uart_register_driver(&sci_uart_driver);
if (ret) {
mutex_unlock(&sci_uart_registration_lock);
return ret;
}
}
mutex_unlock(&sci_uart_registration_lock);
ret = sci_init_single(dev, sciport, index, p, false);
if (ret)
return ret;
@ -3201,24 +3223,17 @@ static struct platform_driver sci_driver = {
static int __init sci_init(void)
{
int ret;
pr_info("%s\n", banner);
ret = uart_register_driver(&sci_uart_driver);
if (likely(ret == 0)) {
ret = platform_driver_register(&sci_driver);
if (unlikely(ret))
uart_unregister_driver(&sci_uart_driver);
}
return ret;
return platform_driver_register(&sci_driver);
}
static void __exit sci_exit(void)
{
platform_driver_unregister(&sci_driver);
uart_unregister_driver(&sci_uart_driver);
if (sci_uart_driver.state)
uart_unregister_driver(&sci_uart_driver);
}
#ifdef CONFIG_SERIAL_SH_SCI_CONSOLE

2
drivers/tty/serial/sirfsoc_uart.c
View File

@ -1253,7 +1253,7 @@ next_hrt:
return HRTIMER_RESTART;
}
static struct of_device_id sirfsoc_uart_ids[] = {
static const struct of_device_id sirfsoc_uart_ids[] = {
{ .compatible = "sirf,prima2-uart", .data = &sirfsoc_uart,},
{ .compatible = "sirf,atlas7-uart", .data = &sirfsoc_uart},
{ .compatible = "sirf,prima2-usp-uart", .data = &sirfsoc_usp},

10
drivers/tty/serial/xilinx_uartps.c
View File

@ -186,6 +186,7 @@ MODULE_PARM_DESC(rx_timeout, "Rx timeout, 1-255");
* @pclk: APB clock
* @baud: Current baud rate
* @clk_rate_change_nb: Notifier block for clock changes
* @quirks: Flags for RXBS support.
*/
struct cdns_uart {
struct uart_port *port;
@ -1587,20 +1588,21 @@ static int cdns_uart_probe(struct platform_device *pdev)
if (rc) {
dev_err(&pdev->dev,
"uart_add_one_port() failed; err=%i\n", rc);
goto err_out_notif_unreg;
goto err_out_pm_disable;
}
return 0;
err_out_pm_disable:
pm_runtime_disable(&pdev->dev);
pm_runtime_set_suspended(&pdev->dev);
pm_runtime_dont_use_autosuspend(&pdev->dev);
err_out_notif_unreg:
#ifdef CONFIG_COMMON_CLK
clk_notifier_unregister(cdns_uart_data->uartclk,
&cdns_uart_data->clk_rate_change_nb);
#endif
err_out_clk_disable:
pm_runtime_disable(&pdev->dev);
pm_runtime_set_suspended(&pdev->dev);
pm_runtime_dont_use_autosuspend(&pdev->dev);
clk_disable_unprepare(cdns_uart_data->uartclk);
err_out_clk_dis_pclk:
clk_disable_unprepare(cdns_uart_data->pclk);

44
drivers/tty/tty_ldisc.c
View File

@ -491,6 +491,29 @@ static void tty_ldisc_close(struct tty_struct *tty, struct tty_ldisc *ld)
tty_ldisc_debug(tty, "%p: closed\n", ld);
}
/**
* tty_ldisc_failto - helper for ldisc failback
* @tty: tty to open the ldisc on
* @ld: ldisc we are trying to fail back to
*
* Helper to try and recover a tty when switching back to the old
* ldisc fails and we need something attached.
*/
static int tty_ldisc_failto(struct tty_struct *tty, int ld)
{
struct tty_ldisc *disc = tty_ldisc_get(tty, ld);
int r;
if (IS_ERR(disc))
return PTR_ERR(disc);
tty->ldisc = disc;
tty_set_termios_ldisc(tty, ld);
if ((r = tty_ldisc_open(tty, disc)) < 0)
tty_ldisc_put(disc);
return r;
}
/**
* tty_ldisc_restore - helper for tty ldisc change
* @tty: tty to recover
@ -502,9 +525,6 @@ static void tty_ldisc_close(struct tty_struct *tty, struct tty_ldisc *ld)
static void tty_ldisc_restore(struct tty_struct *tty, struct tty_ldisc *old)
{
struct tty_ldisc *new_ldisc;
int r;
/* There is an outstanding reference here so this is safe */
old = tty_ldisc_get(tty, old->ops->num);
WARN_ON(IS_ERR(old));
@ -512,17 +532,13 @@ static void tty_ldisc_restore(struct tty_struct *tty, struct tty_ldisc *old)
tty_set_termios_ldisc(tty, old->ops->num);
if (tty_ldisc_open(tty, old) < 0) {
tty_ldisc_put(old);
/* This driver is always present */
new_ldisc = tty_ldisc_get(tty, N_TTY);
if (IS_ERR(new_ldisc))
panic("n_tty: get");
tty->ldisc = new_ldisc;
tty_set_termios_ldisc(tty, N_TTY);
r = tty_ldisc_open(tty, new_ldisc);
if (r < 0)
panic("Couldn't open N_TTY ldisc for "
"%s --- error %d.",
tty_name(tty), r);
/* The traditional behaviour is to fall back to N_TTY, we
want to avoid falling back to N_NULL unless we have no
choice to avoid the risk of breaking anything */
if (tty_ldisc_failto(tty, N_TTY) < 0 &&
tty_ldisc_failto(tty, N_NULL) < 0)
panic("Couldn't open N_NULL ldisc for %s.",
tty_name(tty));
}
}

56
drivers/tty/vt/consolemap.c
View File

@ -322,15 +322,13 @@ int con_set_trans_old(unsigned char __user * arg)
{
int i;
unsigned short inbuf[E_TABSZ];
unsigned char ubuf[E_TABSZ];
if (!access_ok(VERIFY_READ, arg, E_TABSZ))
if (copy_from_user(ubuf, arg, E_TABSZ))
return -EFAULT;
for (i = 0; i < E_TABSZ ; i++) {
unsigned char uc;
__get_user(uc, arg+i);
inbuf[i] = UNI_DIRECT_BASE | uc;
}
for (i = 0; i < E_TABSZ ; i++)
inbuf[i] = UNI_DIRECT_BASE | ubuf[i];
console_lock();
memcpy(translations[USER_MAP], inbuf, sizeof(inbuf));
@ -345,9 +343,6 @@ int con_get_trans_old(unsigned char __user * arg)
unsigned short *p = translations[USER_MAP];
unsigned char outbuf[E_TABSZ];
if (!access_ok(VERIFY_WRITE, arg, E_TABSZ))
return -EFAULT;
console_lock();
for (i = 0; i < E_TABSZ ; i++)
{
@ -356,22 +351,16 @@ int con_get_trans_old(unsigned char __user * arg)
}
console_unlock();
for (i = 0; i < E_TABSZ ; i++)
__put_user(outbuf[i], arg+i);
return 0;
return copy_to_user(arg, outbuf, sizeof(outbuf)) ? -EFAULT : 0;
}
int con_set_trans_new(ushort __user * arg)
{
int i;
unsigned short inbuf[E_TABSZ];
if (!access_ok(VERIFY_READ, arg, E_TABSZ*sizeof(unsigned short)))
if (copy_from_user(inbuf, arg, sizeof(inbuf)))
return -EFAULT;
for (i = 0; i < E_TABSZ ; i++)
__get_user(inbuf[i], arg+i);
console_lock();
memcpy(translations[USER_MAP], inbuf, sizeof(inbuf));
update_user_maps();
@ -381,19 +370,13 @@ int con_set_trans_new(ushort __user * arg)
int con_get_trans_new(ushort __user * arg)
{
int i;
unsigned short outbuf[E_TABSZ];
if (!access_ok(VERIFY_WRITE, arg, E_TABSZ*sizeof(unsigned short)))
return -EFAULT;
console_lock();
memcpy(outbuf, translations[USER_MAP], sizeof(outbuf));
console_unlock();
for (i = 0; i < E_TABSZ ; i++)
__put_user(outbuf[i], arg+i);
return 0;
return copy_to_user(arg, outbuf, sizeof(outbuf)) ? -EFAULT : 0;
}
/*
@ -557,14 +540,9 @@ int con_set_unimap(struct vc_data *vc, ushort ct, struct unipair __user *list)
if (!ct)
return 0;
unilist = kmalloc_array(ct, sizeof(struct unipair), GFP_KERNEL);
if (!unilist)
return -ENOMEM;
for (i = ct, plist = unilist; i; i--, plist++, list++) {
__get_user(plist->unicode, &list->unicode);
__get_user(plist->fontpos, &list->fontpos);
}
unilist = memdup_user(list, ct * sizeof(struct unipair));
if (IS_ERR(unilist))
return PTR_ERR(unilist);
console_lock();
@ -757,11 +735,11 @@ EXPORT_SYMBOL(con_copy_unimap);
*/
int con_get_unimap(struct vc_data *vc, ushort ct, ushort __user *uct, struct unipair __user *list)
{
int i, j, k;
int i, j, k, ret = 0;
ushort ect;
u16 **p1, *p2;
struct uni_pagedir *p;
struct unipair *unilist, *plist;
struct unipair *unilist;
unilist = kmalloc_array(ct, sizeof(struct unipair), GFP_KERNEL);
if (!unilist)
@ -792,13 +770,11 @@ int con_get_unimap(struct vc_data *vc, ushort ct, ushort __user *uct, struct uni
}
}
console_unlock();
for (i = min(ect, ct), plist = unilist; i; i--, list++, plist++) {
__put_user(plist->unicode, &list->unicode);
__put_user(plist->fontpos, &list->fontpos);
}
__put_user(ect, uct);
if (copy_to_user(list, unilist, min(ect, ct) * sizeof(struct unipair)))
ret = -EFAULT;
put_user(ect, uct);
kfree(unilist);
return ((ect <= ct) ? 0 : -ENOMEM);
return ret ? ret : (ect <= ct) ? 0 : -ENOMEM;
}
/*

3
drivers/tty/vt/keyboard.c
View File

@ -1203,8 +1203,7 @@ DECLARE_TASKLET_DISABLED(keyboard_tasklet, kbd_bh, 0);
#if defined(CONFIG_X86) || defined(CONFIG_IA64) || defined(CONFIG_ALPHA) ||\
defined(CONFIG_MIPS) || defined(CONFIG_PPC) || defined(CONFIG_SPARC) ||\
defined(CONFIG_PARISC) || defined(CONFIG_SUPERH) ||\
(defined(CONFIG_ARM) && defined(CONFIG_KEYBOARD_ATKBD) && !defined(CONFIG_ARCH_RPC)) ||\
defined(CONFIG_AVR32)
(defined(CONFIG_ARM) && defined(CONFIG_KEYBOARD_ATKBD) && !defined(CONFIG_ARCH_RPC))
#define HW_RAW(dev) (test_bit(EV_MSC, dev->evbit) && test_bit(MSC_RAW, dev->mscbit) &&\
((dev)->id.bustype == BUS_I8042) && ((dev)->id.vendor == 0x0001) && ((dev)->id.product == 0x0001))

8
drivers/tty/vt/vt.c
View File

@ -425,7 +425,7 @@ static u8 build_attr(struct vc_data *vc, u8 _color, u8 _intensity, u8 _blink,
else if (_underline)
a = (a & 0xf0) | vc->vc_ulcolor;
else if (_intensity == 0)
a = (a & 0xf0) | vc->vc_ulcolor;
a = (a & 0xf0) | vc->vc_halfcolor;
if (_reverse)
a = ((a) & 0x88) | ((((a) >> 4) | ((a) << 4)) & 0x77);
if (_blink)
@ -2709,13 +2709,13 @@ int tioclinux(struct tty_struct *tty, unsigned long arg)
* related to the kernel should not use this.
*/
data = vt_get_shift_state();
ret = __put_user(data, p);
ret = put_user(data, p);
break;
case TIOCL_GETMOUSEREPORTING:
console_lock(); /* May be overkill */
data = mouse_reporting();
console_unlock();
ret = __put_user(data, p);
ret = put_user(data, p);
break;
case TIOCL_SETVESABLANK:
console_lock();
@ -2724,7 +2724,7 @@ int tioclinux(struct tty_struct *tty, unsigned long arg)
break;
case TIOCL_GETKMSGREDIRECT:
data = vt_get_kmsg_redirect();
ret = __put_user(data, p);
ret = put_user(data, p);
break;
case TIOCL_SETKMSGREDIRECT:
if (!capable(CAP_SYS_ADMIN)) {

8
drivers/tty/vt/vt_ioctl.c
View File

@ -266,10 +266,6 @@ do_unimap_ioctl(int cmd, struct unimapdesc __user *user_ud, int perm, struct vc_
if (copy_from_user(&tmp, user_ud, sizeof tmp))
return -EFAULT;
if (tmp.entries)
if (!access_ok(VERIFY_WRITE, tmp.entries,
tmp.entry_ct*sizeof(struct unipair)))
return -EFAULT;
switch (cmd) {
case PIO_UNIMAP:
if (!perm)
@ -1170,10 +1166,6 @@ compat_unimap_ioctl(unsigned int cmd, struct compat_unimapdesc __user *user_ud,
if (copy_from_user(&tmp, user_ud, sizeof tmp))
return -EFAULT;
tmp_entries = compat_ptr(tmp.entries);
if (tmp_entries)
if (!access_ok(VERIFY_WRITE, tmp_entries,
tmp.entry_ct*sizeof(struct unipair)))
return -EFAULT;
switch (cmd) {
case PIO_UNIMAP:
if (!perm)

67
drivers/usb/serial/ftdi_sio.c
View File

@ -1244,42 +1244,13 @@ static __u32 get_ftdi_divisor(struct tty_struct *tty,
int div_okay = 1;
int baud;
/*
* The logic involved in setting the baudrate can be cleanly split into
* 3 steps.
* 1. Standard baud rates are set in tty->termios->c_cflag
* 2. If these are not enough, you can set any speed using alt_speed as
* follows:
* - set tty->termios->c_cflag speed to B38400
* - set your real speed in tty->alt_speed; it gets ignored when
* alt_speed==0, (or)
* - call TIOCSSERIAL ioctl with (struct serial_struct) set as
* follows:
* flags & ASYNC_SPD_MASK == ASYNC_SPD_[HI, VHI, SHI, WARP],
* this just sets alt_speed to (HI: 57600, VHI: 115200,
* SHI: 230400, WARP: 460800)
* ** Steps 1, 2 are done courtesy of tty_get_baud_rate
* 3. You can also set baud rate by setting custom divisor as follows
* - set tty->termios->c_cflag speed to B38400
* - call TIOCSSERIAL ioctl with (struct serial_struct) set as
* follows:
* o flags & ASYNC_SPD_MASK == ASYNC_SPD_CUST
* o custom_divisor set to baud_base / your_new_baudrate
* ** Step 3 is done courtesy of code borrowed from serial.c
* I should really spend some time and separate + move this common
* code to serial.c, it is replicated in nearly every serial driver
* you see.
*/
/* 1. Get the baud rate from the tty settings, this observes
alt_speed hack */
baud = tty_get_baud_rate(tty);
dev_dbg(dev, "%s - tty_get_baud_rate reports speed %d\n", __func__, baud);
/* 2. Observe async-compatible custom_divisor hack, update baudrate
if needed */
/*
* Observe deprecated async-compatible custom_divisor hack, update
* baudrate if needed.
*/
if (baud == 38400 &&
((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST) &&
(priv->custom_divisor)) {
@ -1288,8 +1259,6 @@ static __u32 get_ftdi_divisor(struct tty_struct *tty,
__func__, priv->custom_divisor, baud);
}
/* 3. Convert baudrate to device-specific divisor */
if (!baud)
baud = 9600;
switch (priv->chip_type) {
@ -1505,8 +1474,7 @@ static int set_serial_info(struct tty_struct *tty,
/* Do error checking and permission checking */
if (!capable(CAP_SYS_ADMIN)) {
if (((new_serial.flags & ~ASYNC_USR_MASK) !=
(priv->flags & ~ASYNC_USR_MASK))) {
if ((new_serial.flags ^ priv->flags) & ~ASYNC_USR_MASK) {
mutex_unlock(&priv->cfg_lock);
return -EPERM;
}
@ -1530,23 +1498,14 @@ static int set_serial_info(struct tty_struct *tty,
check_and_exit:
write_latency_timer(port);
if ((old_priv.flags & ASYNC_SPD_MASK) !=
(priv->flags & ASYNC_SPD_MASK)) {
if ((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
tty->alt_speed = 57600;
else if ((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
tty->alt_speed = 115200;
else if ((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
tty->alt_speed = 230400;
else if ((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
tty->alt_speed = 460800;
else
tty->alt_speed = 0;
}
if (((old_priv.flags & ASYNC_SPD_MASK) !=
(priv->flags & ASYNC_SPD_MASK)) ||
(((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST) &&
(old_priv.custom_divisor != priv->custom_divisor))) {
if ((priv->flags ^ old_priv.flags) & ASYNC_SPD_MASK ||
((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST &&
priv->custom_divisor != old_priv.custom_divisor)) {
/* warn about deprecation unless clearing */
if (priv->flags & ASYNC_SPD_MASK)
dev_warn_ratelimited(&port->dev, "use of SPD flags is deprecated\n");
change_speed(tty, port);
mutex_unlock(&priv->cfg_lock);
}

6
fs/compat_ioctl.c
View File

@ -866,8 +866,6 @@ COMPATIBLE_IOCTL(TIOCGDEV)
COMPATIBLE_IOCTL(TIOCCBRK)
COMPATIBLE_IOCTL(TIOCGSID)
COMPATIBLE_IOCTL(TIOCGICOUNT)
COMPATIBLE_IOCTL(TIOCGPKT)
COMPATIBLE_IOCTL(TIOCGPTLCK)
COMPATIBLE_IOCTL(TIOCGEXCL)
/* Little t */
COMPATIBLE_IOCTL(TIOCGETD)
@ -883,16 +881,12 @@ COMPATIBLE_IOCTL(TIOCMGET)
COMPATIBLE_IOCTL(TIOCMBIC)
COMPATIBLE_IOCTL(TIOCMBIS)
COMPATIBLE_IOCTL(TIOCMSET)
COMPATIBLE_IOCTL(TIOCPKT)
COMPATIBLE_IOCTL(TIOCNOTTY)
COMPATIBLE_IOCTL(TIOCSTI)
COMPATIBLE_IOCTL(TIOCOUTQ)
COMPATIBLE_IOCTL(TIOCSPGRP)
COMPATIBLE_IOCTL(TIOCGPGRP)
COMPATIBLE_IOCTL(TIOCGPTN)
COMPATIBLE_IOCTL(TIOCSPTLCK)
COMPATIBLE_IOCTL(TIOCSERGETLSR)
COMPATIBLE_IOCTL(TIOCSIG)
#ifdef TIOCSRS485
COMPATIBLE_IOCTL(TIOCSRS485)
#endif

10
include/linux/platform_data/atmel.h
View File

@ -9,7 +9,6 @@
#include <linux/mtd/nand.h>
#include <linux/mtd/partitions.h>
#include <linux/serial.h>
/* Compact Flash */
struct at91_cf_data {
@ -42,15 +41,6 @@ struct atmel_nand_data {
bool need_reset_workaround;
};
/* Serial */
struct atmel_uart_data {
int num; /* port num */
short use_dma_tx; /* use transmit DMA? */
short use_dma_rx; /* use receive DMA? */
void __iomem *regs; /* virt. base address, if any */
struct serial_rs485 rs485; /* rs485 settings */
};
/* FIXME: this needs a better location, but gets stuff building again */
extern int at91_suspend_entering_slow_clock(void);

1
include/linux/serial_core.h
View File

@ -195,6 +195,7 @@ struct uart_port {
#define UPF_NO_TXEN_TEST ((__force upf_t) (1 << 15))
#define UPF_MAGIC_MULTIPLIER ((__force upf_t) ASYNC_MAGIC_MULTIPLIER /* 16 */ )
#define UPF_NO_THRE_TEST ((__force upf_t) (1 << 19))
/* Port has hardware-assisted h/w flow control */
#define UPF_AUTO_CTS ((__force upf_t) (1 << 20))
#define UPF_AUTO_RTS ((__force upf_t) (1 << 21))

1
include/linux/tty.h
View File

@ -316,7 +316,6 @@ struct tty_struct {
struct tty_struct *link;
struct fasync_struct *fasync;
int alt_speed; /* For magic substitution of 38400 bps */
wait_queue_head_t write_wait;
wait_queue_head_t read_wait;
struct work_struct hangup_work;

1
include/uapi/asm-generic/ioctls.h
View File

@ -77,6 +77,7 @@
#define TIOCGPKT _IOR('T', 0x38, int) /* Get packet mode state */
#define TIOCGPTLCK _IOR('T', 0x39, int) /* Get Pty lock state */
#define TIOCGEXCL _IOR('T', 0x40, int) /* Get exclusive mode state */
#define TIOCGPTPEER _IOR('T', 0x41, int) /* Safely open the slave */
#define FIONCLEX 0x5450
#define FIOCLEX 0x5451

3
include/uapi/linux/serial.h
View File

@ -122,6 +122,9 @@ struct serial_rs485 {
#define SER_RS485_RTS_AFTER_SEND (1 << 2) /* Logical level for
RTS pin after sent*/
#define SER_RS485_RX_DURING_TX (1 << 4)
#define SER_RS485_TERMINATE_BUS (1 << 5) /* Enable bus
termination
(if supported) */
__u32 delay_rts_before_send; /* Delay before send (milliseconds) */
__u32 delay_rts_after_send; /* Delay after send (milliseconds) */
__u32 padding[5]; /* Memory is cheap, new structs

2
include/uapi/linux/serial_core.h
View File

@ -83,7 +83,7 @@
/* Parisc type numbers. */
#define PORT_MUX 48
/* Atmel AT91 / AT32 SoC */
/* Atmel AT91 SoC */
#define PORT_ATMEL 49
/* Macintosh Zilog type numbers */

1
include/uapi/linux/tty.h
View File

@ -36,5 +36,6 @@
#define N_TRACEROUTER 24 /* Trace data routing for MIPI P1149.7 */
#define N_NCI 25 /* NFC NCI UART */
#define N_SPEAKUP 26 /* Speakup communication with synths */
#define N_NULL 27 /* Null ldisc used for error handling */
#endif /* _UAPI_LINUX_TTY_H */

105
net/irda/ircomm/ircomm_tty_ioctl.c
View File

@ -97,33 +97,7 @@ static void ircomm_tty_change_speed(struct ircomm_tty_cb *self,
self->settings.flow_control &= ~IRCOMM_RTS_CTS_IN;
}
tty_port_set_check_carrier(&self->port, ~cflag & CLOCAL);
#if 0
/*
* Set up parity check flag
*/
if (I_INPCK(self->tty))
driver->read_status_mask |= LSR_FE | LSR_PE;
if (I_BRKINT(driver->tty) || I_PARMRK(driver->tty))
driver->read_status_mask |= LSR_BI;
/*
* Characters to ignore
*/
driver->ignore_status_mask = 0;
if (I_IGNPAR(driver->tty))
driver->ignore_status_mask |= LSR_PE | LSR_FE;
if (I_IGNBRK(self->tty)) {
self->ignore_status_mask |= LSR_BI;
/*
* If we're ignore parity and break indicators, ignore
* overruns too. (For real raw support).
*/
if (I_IGNPAR(self->tty))
self->ignore_status_mask |= LSR_OE;
}
#endif
self->settings.data_format = cval;
ircomm_param_request(self, IRCOMM_DATA_FORMAT, FALSE);
@ -271,67 +245,6 @@ static int ircomm_tty_get_serial_info(struct ircomm_tty_cb *self,
static int ircomm_tty_set_serial_info(struct ircomm_tty_cb *self,
struct serial_struct __user *new_info)
{
#if 0
struct serial_struct new_serial;
struct ircomm_tty_cb old_state, *state;
if (copy_from_user(&new_serial,new_info,sizeof(new_serial)))
return -EFAULT;
state = self
old_state = *self;
if (!capable(CAP_SYS_ADMIN)) {
if ((new_serial.baud_base != state->settings.data_rate) ||
(new_serial.close_delay != state->close_delay) ||
((new_serial.flags & ~ASYNC_USR_MASK) !=
(self->flags & ~ASYNC_USR_MASK)))
return -EPERM;
state->flags = ((state->flags & ~ASYNC_USR_MASK) |
(new_serial.flags & ASYNC_USR_MASK));
self->flags = ((self->flags & ~ASYNC_USR_MASK) |
(new_serial.flags & ASYNC_USR_MASK));
/* self->custom_divisor = new_serial.custom_divisor; */
goto check_and_exit;
}
/*
* OK, past this point, all the error checking has been done.
* At this point, we start making changes.....
*/
if (self->settings.data_rate != new_serial.baud_base) {
self->settings.data_rate = new_serial.baud_base;
ircomm_param_request(self, IRCOMM_DATA_RATE, TRUE);
}
self->close_delay = new_serial.close_delay * HZ/100;
self->closing_wait = new_serial.closing_wait * HZ/100;
/* self->custom_divisor = new_serial.custom_divisor; */
self->flags = ((self->flags & ~ASYNC_FLAGS) |
(new_serial.flags & ASYNC_FLAGS));
self->tty->low_latency = (self->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
check_and_exit:
if (tty_port_initialized(self)) {
if (((old_state.flags & ASYNC_SPD_MASK) !=
(self->flags & ASYNC_SPD_MASK)) ||
(old_driver.custom_divisor != driver->custom_divisor)) {
if ((driver->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
driver->tty->alt_speed = 57600;
if ((driver->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
driver->tty->alt_speed = 115200;
if ((driver->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
driver->tty->alt_speed = 230400;
if ((driver->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
driver->tty->alt_speed = 460800;
ircomm_tty_change_speed(driver);
}
}
#endif
return 0;
}
@ -367,24 +280,6 @@ int ircomm_tty_ioctl(struct tty_struct *tty,
case TIOCGICOUNT:
pr_debug("%s(), TIOCGICOUNT not impl!\n", __func__);
#if 0
save_flags(flags); cli();
cnow = driver->icount;
restore_flags(flags);
p_cuser = (struct serial_icounter_struct __user *) arg;
if (put_user(cnow.cts, &p_cuser->cts) ||
put_user(cnow.dsr, &p_cuser->dsr) ||
put_user(cnow.rng, &p_cuser->rng) ||
put_user(cnow.dcd, &p_cuser->dcd) ||
put_user(cnow.rx, &p_cuser->rx) ||
put_user(cnow.tx, &p_cuser->tx) ||
put_user(cnow.frame, &p_cuser->frame) ||
put_user(cnow.overrun, &p_cuser->overrun) ||
put_user(cnow.parity, &p_cuser->parity) ||
put_user(cnow.brk, &p_cuser->brk) ||
put_user(cnow.buf_overrun, &p_cuser->buf_overrun))
return -EFAULT;
#endif
return 0;
default:
ret = -ENOIOCTLCMD; /* ioctls which we must ignore */