mcb: export bus information via sysfs
Export information about the bus stored in the FPGA's header to userspace via sysfs, instead of hiding it in pr_debug()s from everyone. Signed-off-by: Johannes Thumshirn <jthumshirn@suse.de> Reviewed-by: Andreas Werner <andreas.werner@men.de> Tested-by: Andreas Werner <andreas.werner@men.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Documentation/ABI/testing/sysfs-bus-mcb
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29
Documentation/ABI/testing/sysfs-bus-mcb
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What: /sys/bus/mcb/devices/mcb:X
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Date: March 2016
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KernelVersion: 4.7
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Contact: Johannes Thumshirn <jth@kernel.org>
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Description: Hardware chip or device hosting the MEN chameleon bus
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What: /sys/bus/mcb/devices/mcb:X/revision
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Date: March 2016
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KernelVersion: 4.7
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Contact: Johannes Thumshirn <jth@kernel.org>
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Description: The FPGA's revision number
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What: /sys/bus/mcb/devices/mcb:X/minor
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Date: March 2016
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KernelVersion: 4.7
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Contact: Johannes Thumshirn <jth@kernel.org>
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Description: The FPGA's minor number
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What: /sys/bus/mcb/devices/mcb:X/model
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Date: March 2016
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KernelVersion: 4.7
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Contact: Johannes Thumshirn <jth@kernel.org>
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Description: The FPGA's model number
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What: /sys/bus/mcb/devices/mcb:X/name
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Date: March 2016
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KernelVersion: 4.7
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Contact: Johannes Thumshirn <jth@kernel.org>
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Description: The FPGA's name
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@ -90,6 +90,60 @@ static void mcb_shutdown(struct device *dev)
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mdrv->shutdown(mdev);
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mdrv->shutdown(mdev);
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}
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}
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static ssize_t revision_show(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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struct mcb_bus *bus = to_mcb_bus(dev);
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return scnprintf(buf, PAGE_SIZE, "%d\n", bus->revision);
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}
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static DEVICE_ATTR_RO(revision);
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static ssize_t model_show(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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struct mcb_bus *bus = to_mcb_bus(dev);
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return scnprintf(buf, PAGE_SIZE, "%c\n", bus->model);
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}
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static DEVICE_ATTR_RO(model);
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static ssize_t minor_show(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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struct mcb_bus *bus = to_mcb_bus(dev);
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return scnprintf(buf, PAGE_SIZE, "%d\n", bus->minor);
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}
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static DEVICE_ATTR_RO(minor);
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static ssize_t name_show(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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struct mcb_bus *bus = to_mcb_bus(dev);
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return scnprintf(buf, PAGE_SIZE, "%s\n", bus->name);
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}
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static DEVICE_ATTR_RO(name);
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static struct attribute *mcb_bus_attrs[] = {
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&dev_attr_revision.attr,
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&dev_attr_model.attr,
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&dev_attr_minor.attr,
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&dev_attr_name.attr,
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NULL,
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};
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static const struct attribute_group mcb_carrier_group = {
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.attrs = mcb_bus_attrs,
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};
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static const struct attribute_group *mcb_carrier_groups[] = {
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&mcb_carrier_group,
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NULL,
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};
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static struct bus_type mcb_bus_type = {
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static struct bus_type mcb_bus_type = {
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.name = "mcb",
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.name = "mcb",
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.match = mcb_match,
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.match = mcb_match,
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@ -99,6 +153,11 @@ static struct bus_type mcb_bus_type = {
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.shutdown = mcb_shutdown,
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.shutdown = mcb_shutdown,
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};
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};
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static struct device_type mcb_carrier_device_type = {
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.name = "mcb-carrier",
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.groups = mcb_carrier_groups,
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};
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/**
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/**
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* __mcb_register_driver() - Register a @mcb_driver at the system
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* __mcb_register_driver() - Register a @mcb_driver at the system
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* @drv: The @mcb_driver
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* @drv: The @mcb_driver
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@ -205,6 +264,7 @@ struct mcb_bus *mcb_alloc_bus(struct device *carrier)
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device_initialize(&bus->dev);
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device_initialize(&bus->dev);
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bus->dev.parent = carrier;
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bus->dev.parent = carrier;
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bus->dev.bus = &mcb_bus_type;
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bus->dev.bus = &mcb_bus_type;
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bus->dev.type = &mcb_carrier_device_type;
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dev_set_name(&bus->dev, "mcb:%d", bus_nr);
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dev_set_name(&bus->dev, "mcb:%d", bus_nr);
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rc = device_add(&bus->dev);
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rc = device_add(&bus->dev);
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@ -5,7 +5,6 @@
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#define PCI_VENDOR_ID_MEN 0x1a88
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#define PCI_VENDOR_ID_MEN 0x1a88
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#define PCI_DEVICE_ID_MEN_CHAMELEON 0x4d45
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#define PCI_DEVICE_ID_MEN_CHAMELEON 0x4d45
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#define CHAMELEON_FILENAME_LEN 12
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#define CHAMELEONV2_MAGIC 0xabce
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#define CHAMELEONV2_MAGIC 0xabce
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#define CHAM_HEADER_SIZE 0x200
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#define CHAM_HEADER_SIZE 0x200
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@ -113,16 +113,11 @@ int chameleon_parse_cells(struct mcb_bus *bus, phys_addr_t mapbase,
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}
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}
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p += hsize;
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p += hsize;
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pr_debug("header->revision = %d\n", header->revision);
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bus->revision = header->revision;
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pr_debug("header->model = 0x%x ('%c')\n", header->model,
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bus->model = header->model;
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header->model);
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bus->minor = header->minor;
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pr_debug("header->minor = %d\n", header->minor);
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snprintf(bus->name, CHAMELEON_FILENAME_LEN + 1, "%s",
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pr_debug("header->bus_type = 0x%x\n", header->bus_type);
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header->filename);
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pr_debug("header->magic = 0x%x\n", header->magic);
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pr_debug("header->filename = \"%.*s\"\n", CHAMELEON_FILENAME_LEN,
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header->filename);
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for_each_chameleon_cell(dtype, p) {
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for_each_chameleon_cell(dtype, p) {
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switch (dtype) {
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switch (dtype) {
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@ -15,6 +15,8 @@
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#include <linux/device.h>
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#include <linux/device.h>
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#include <linux/irqreturn.h>
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#include <linux/irqreturn.h>
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#define CHAMELEON_FILENAME_LEN 12
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struct mcb_driver;
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struct mcb_driver;
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struct mcb_device;
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struct mcb_device;
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@ -25,11 +27,18 @@ struct mcb_device;
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* @carrier: pointer to carrier device
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* @carrier: pointer to carrier device
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* @bus_nr: mcb bus number
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* @bus_nr: mcb bus number
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* @get_irq: callback to get IRQ number
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* @get_irq: callback to get IRQ number
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* @revision: the FPGA's revision number
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* @model: the FPGA's model number
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* @filename: the FPGA's name
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*/
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*/
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struct mcb_bus {
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struct mcb_bus {
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struct device dev;
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struct device dev;
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struct device *carrier;
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struct device *carrier;
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int bus_nr;
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int bus_nr;
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u8 revision;
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char model;
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u8 minor;
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char name[CHAMELEON_FILENAME_LEN + 1];
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int (*get_irq)(struct mcb_device *dev);
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int (*get_irq)(struct mcb_device *dev);
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};
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};
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#define to_mcb_bus(b) container_of((b), struct mcb_bus, dev)
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#define to_mcb_bus(b) container_of((b), struct mcb_bus, dev)
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