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Message-ID: <da7a7b1d-f032-4d3e-a998-4ba4792b6d85@redhat.com>
Date: Mon, 20 Nov 2023 12:52:55 +0100
From: Hans de Goede <hdegoede@...hat.com>
To: Henry Shi <henryshi2018@...il.com>, hbshi69@...mail.com,
tglx@...utronix.de, mingo@...hat.com, bp@...en8.de,
dave.hansen@...ux.intel.com, x86@...nel.org, hpa@...or.com,
markgross@...nel.org, jdelvare@...e.com, linux@...ck-us.net,
linux-kernel@...r.kernel.org, platform-driver-x86@...r.kernel.org,
linux-hwmon@...r.kernel.org
Cc: hb_shi2003@...oo.com, henrys@...icom-usa.com, wenw@...icom-usa.com
Subject: Re: [PATCH v13] platform/x86: Add Silicom Platform Driver
Hi Henri,
On 11/18/23 17:32, Henry Shi wrote:
> platform/x86: Add Silicom Platform Driver
>
> Add Silicom platform (silicom-platform) Linux driver for Swisscom
> Business Box (Swisscom BB) as well as Cordoba family products.
>
> This platform driver provides support for various functions via
> the Linux LED framework, GPIO framework, Hardware Monitoring (HWMON)
> and device attributes.
>
> Signed-off-by: Henry Shi <henryshi2018@...il.com>
Thank you for your patch. Please submit a new version
addressing Ilpo's and Randy's (v12) review remarks.
Regards,
Hans
> ---
>
> Changes from v1 to v2:
> ===========================
>
> Suggested by Hans de Goede <hdegoede@...hat.com>
> .Use git send-email to submit patch.
> .patch contents should be in message body.
> .Kconfig bit for the driver should be in drivers/platform/x86/Kconfig.
>
> changes from patch v2 to v3
> ===========================
>
> changes suggested by Guenter Roeck <groeck7@...il.com>
> .Removed unnecessary include file linux/thermal.h.
> .Removed EXPORT_SYMBOL for mutex lock/unlock function.
>
> Changes suggested by Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
> .Remove extra new line in code on multiple position.
> .Use table instead of space in code.
> .Uss Linux defined bit operation MACRO define.
> .Removed local variable in rpm_get().
> .Corrected typo in comments.
> .Corrected incorrect indentation.
> .Removed unnecessary comments in silicom_mc_leds_register().
> .Rewrite efuse_status_show() to used defined variable and removed
> uncessary local variables.
> .Rewrite uc_version_show() to used defined variable and removed
> uncessary local variables.
> .Removed unused MACRO define: #define CHANNEL_TO_BIT(chan) ((chan) & 0x07).
> .Rewrite powercycle_uc() to used defined variable and removed uncessary
> local variables.
> .use GENMASK() and use FIELD_GET() instead of bit shift.
> .Added define for constant 0x28 used in efuse_status_show().
> .Added define for constant 0x0 used in uc_version_show().
> .Added define for constant 0x0 used in powercycle_uc().
> .Rearrange functions to avoid uncessary pre-define.
> .Rewrite rpm_get() to used defined variable and removed uncessary
> local variables.
> .Rewrite temp_get() to used defined variable and removed uncessary
> local variables.
> .Use FIELD_GET instead of bit shift in temp_get().
> .Used #define for constant variable 0/1.
>
> Changes suggested by Christophe JAILLET <christophe.jaillet@...adoo.fr>:
> .use "if (!led->subled_info)" instead of
> "if (IS_ERR_OR_NULL(led->subled_info))
> "in silicom_mc_leds_register
>
> changes from patch v3 to v4
> ===========================
>
> changes suggested by Guenter Roeck <groeck7@...il.com>
>
> Changes suggested by Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>:
> .Rewrite silicom_mec_led/gpip_set/get() functions to use two newly created
> silicom_mec_port_get()/silicom_mec_port_set() which have common code.
> .Remove duplicate code in silicom_mec_port_get()
> .Rewrite uc_version_show() to use Linux bit operation MACRO, and add
> logic to check un-supported register value.
> .Added "#define MEC_EFUSE_LSB_ADDR 0x28" and "#define
> MEC_POWER_CYCLE_ADDR 0x24"
> .Added "#define MEC_VERSION_MAJOR GENMASK(15, 14)" and "#define
> MEC_VERSION_MINOR GENMASK(13, 8)".
>
> Changes suggested by Christophe JAILLET <christophe.jaillet@...adoo.fr>:
> .Used a local variable to store "sizeof(struct mc_subled)" in function
> silicom_mc_leds_register().
>
> change from patch v4 to v5
> ===========================================
>
> changes suggested by Guenter Roeck <groeck7@...il.com>:
> .Corrected return value in temp_get() to return 1/10000th degree.
> .Removed local variable struct silicom_fan_control_data *ctl in
> silicom_fan_control_read_fan(),
> removed storing rpm value to ctl variable.
> .Removed local variable struct silicom_fan_control_data *ctl in
> silicom_fan_control_read_temp(),
> .removed storing rpm value to ctl variable.
> .Changed return string in silicom_fan_control_read_labels() to
> specific string for Silicom platform driver.
> .Removed silicom_fan_control_data structure.
> .Removed static variable mec_io_base and mec_io_len, and added
> "#define MEC_IO_BASE 0x0800 and #define MEC_IO_LEN 0x8".
> .Removed ".write = NULL" in silicom_fan_control_hwmon_ops
> structure defination.
> .Removed unnecessary function silicom_fan_control_write().
> .Removed unnecessary check for silicom_led_info in function
> silicom_platform_probe.
> .Removed unnecessary local variable "silicom_fan_control_data *ctl"
> in silicom_platform_probe().
> .Clean out driver initialization error handling in
> silicom_platform_init();
> .Add patch version and changelog for patch submission.
>
> Changes suggested by Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>:
> .Rename "#define MEC_DATA(offset) to "#define MEC_DATA_OFFSET(offset).
> .Use constant defined in include/linux/units.h instead of a literal.
> .return directly instead of go to err condition when
> platform_device_register_simple() failed.
> .Remove unnecessary check for silicom_led_info and silicom_gpiochip.
> .Use a local variable to how multiple use of array size.
> .Align the arguments to the same column in
> silicom_mec_led_mc_brightness_set.
> .Add patch version and changelog that shows version to version changes
> for patch submission.
>
> Changes suggested by Christophe JAILLET <christophe.jaillet@...adoo.fr>:
> .Use "sizeof(*led)" instead of "sizeof(struct led_classdev_mc)"
> .Use "if (!led)" instead of "if (IS_ERR_OR_NULL(led))"
> .Removed unnecessary error message:
> "dev_err(dev, "Failed to alloc led_classdev_mc[%d]:
> %ld\n", i, PTR_ERR(led)).
>
> change from patch vv5 to v6
> ===========================================
>
> changes suggested by Guenter Roeck <groeck7@...il.com>:
> .Removed checkpath warnings.
> .Resoved dependencies between CONFIG_HWMON and CONFIG_SILICOM_PLATFORM.
>
> change from patch v6 to v7
> ===========================================
>
> changes suggested by Hans de Goede <hdegoede@...hat.com>:
> .Usa a proper subsystem prefix for this patch subject:
> Subject: platform/x86: Add Silicom Platform Driver.
>
> change from patch v7 to v8
> ===========================================
>
> changes suggested by Hans de Goede <hdegoede@...hat.com>:
> .Chnage commit message of this driver.
> .Adjust location of change log and signed-off-by.
> .Change "config SILICOM_PLATFORM" and help contents location,
> and put it to source "drivers/platform/x86/siemens/Kconfig".
> .Set editor tab to 8 and align the start of extra function
> parameters to directly after (. This should be applied for
> all function.
> .Do not manually create a sysfs dir and register sysfs attribute,
> instead define a platform_driver structure.
> .Move MODULE_DEVICE_TABLE(dmi, silicom_dmi_ids) directly after
> table declaration.
> .Using pr_info() instead of dev_info() in function
> silicom_platform_info_init().
> .Made dmi_check_system() check the first thing to do in
> silicom_platform_init().
> .Instead of separate platform_device creation + driver registration,
> switched to using platform_create_bundle().
> .Removed mutex_destroy(&mec_io_mutex).
>
>
> Changes suggested by Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>:
> .Too many GENMASK() within to code itself, need put them to
> #define. Removed all GENMASK() in c functions.
>
> change from patch v8 to v9
> ===========================================
>
> Changes suggested by Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>:
> .Just do the same (like MEC_VERSION_MAJOR) with all places in the where
> you previously had GENMASK() in the code (currently MEC_GET_BITS()
> is there, obviously, but it should go away and be replaced with
> FIELD_GET(GOODPREFIX_GOODNAME, ...))).
> .This is sysfs so it's odd to print pr_err() like that here. If the driver
> does not support those versions at all, the probe should fail. If driver is
> fine but just doesn't know how to interpret such a version, you should
> return -Esomething here. Driver returns -EINVAL here.
> .Replace CENTI with 100
> .Align FIELD_GET()s to the same column for line 661.
> .Change variables efuse_status, mec_uc_version, power_cycle to unsigned
> int from int.
>
> changes suggested by Hans de Goede <hdegoede@...hat.com>:
> .Please add a Documentation/ABI/testing/sysfs-platform-silicom
> file to document driver specific the sysfs attributes of this driver.
> .Like with the Kconfig part, group this together with the other industrial
> PC drivers we have at the end of the Makefile after Siemens
> Simatic Industrial PCs.
>
> change from patch v9 to v10
> ===========================================
>
> Changes suggested by Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>:
> .Added missing newline in kernel document file.
> .Changed the order #define to make sure they are in increasing order.
> .Removed printing in init function silicom_platform_info_init();
> .Changed #define name MEC_PREFIX_HIGH_BYTES to MEC_TEMPERATURE.
> .Removed dev_err(dev, "Failed to register[%d]: %d\n", i, err)
> in function silicom_mc_leds_register() before ruturn err.
> .Changed %du to %u in function power_cycle_store(...).
> .Chnaged sprintf() to sysfs_emit().
> .Changed start point for multi-line comments.
> .Added empty line to seperate #define.
> .Remove parenthesis around MEC_IO_BASE.
> .Changed #define EC_ADDR_MSB (MEC_IO_BASE + 0x3), use
> a constant value instead of MEC_DATA_OFFSET_MASK.
> .Changed define name MEC_PREFIX_NAME to MEC_PORT_LOC.
> .Changed define MEC_PREFIX_HIGH_BYTES to MEC_TEMP_LOC.
> .Removed "PREFIX" from define name, changed
> MEC_PREFIX_SEC_BYTE to MEC_VERSION_LOC.
>
> change from patch v10 to v11
> ===========================================
>
> Changes suggested by Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>:
> .Don't print anything when userspace gives an invalid value,
> just return -EINVAL in function power_cycle_store().
> .The includes should be in alphabethical order.
> .Just make the calculation once and store into a local variable
> in function silicom_mec_port_set().
> .Use GENMASK for MEC_PORT_OFFSET_MASK, MEC_PORT_CHANNEL_MASK,
> MEC_DATA_OFFSET_MASK.
> .Rename MEC_PORT_LOC to MEC_PORT_DWORD_OFFSET.
> .Add local variable to function silicom_mec_port_set() and
> silicom_mec_port_get() to make the code less heavy to read.
> .Allgned defines start from same column mostly.
> .Kernel test robot WARNING sys/devices/platform/silicom-platform/hwmon/hwmon1/
> is defined 4 times.
>
> change from patch v11 to v12
> ===========================================
>
> Changes suggested by Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>:
> Several editorial things:
> .Put the subdir headers separately.
> .Add more new line in define section.
> .Use () around all macro arguments to be on the safe side.
> .Add new line and remove comment in function silicom_mec_port_get().
> .Add new line and remove comment in function silicom_mec_port_set().
> .Remove unnecessary comment in function temp_get(), rpm_get().
>
> change from patch v12 to v13 (current)
> ===========================================
>
> Changes suggested by Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>:
> .Put parenthesis in #define MEC_DATA_OFFSET(offset).
> .Remove unnecessary local variable *name and correct typo.
> .Use lower case for driver name.
> .Use reverse xmas tree order for function variables.
>
> Changes suggested by Randy Dunlap <rdunlap@...radead.org>:
> .Added "depends on GPIOLIB" in Kconfig.
> .Added default value for power_cycle file.
> .Added scale of temperature returned by temp1_input.
> .Correct editorlal issue in sysfs-platform-silicom.
> .Removed extra parenthesis around MEC_IO_BASE.
> .More indentation in silicom_mec_led_mc_brightness_set().
>
> .Kernel test robot WARNING: unmet direct dependencies detected for
> LEDS_CLASS_MULTICOLOR.
>
> .../ABI/testing/sysfs-platform-silicom | 264 +++++
> drivers/platform/x86/Kconfig | 17 +
> drivers/platform/x86/Makefile | 3 +
> drivers/platform/x86/silicom-platform.c | 1010 +++++++++++++++++
> 4 files changed, 1294 insertions(+)
> create mode 100644 Documentation/ABI/testing/sysfs-platform-silicom
> create mode 100644 drivers/platform/x86/silicom-platform.c
>
> diff --git a/Documentation/ABI/testing/sysfs-platform-silicom b/Documentation/ABI/testing/sysfs-platform-silicom
> new file mode 100644
> index 000000000000..01205362f836
> --- /dev/null
> +++ b/Documentation/ABI/testing/sysfs-platform-silicom
> @@ -0,0 +1,264 @@
> +What: /sys/devices/platform/silicom-platform/uc_version
> +Date: November 2023
> +KernelVersion: 6.7
> +Contact: Henry Shi <henrys@...icom-usa.com>
> +Description:
> + This file allows to read microcontroller firmware
> + version of current platform.
> +
> +What: /sys/devices/platform/silicom-platform/power_cycle
> +Date: November 2023
> +KernelVersion: 6.7
> +Contact: Henry Shi <henrys@...icom-usa.com>
> + This file allow user to power cycle the platform.
> + default value is 0; when set to 1, it powers down
> + the platform, wait 5 seconds, then power on the
> + device. It returns to default value after power cycle.
> +
> + 0 - default value.
> +
> +What: /sys/devices/platform/silicom-platform/efuse_status
> +Date: November 2023
> +KernelVersion: 6.7
> +Contact: Henry Shi <henrys@...icom-usa.com>
> +Description:
> + This file is read only. It returns the current
> + OTP status:
> +
> + 0 - not programmed.
> + 1 - programmed.
> +
> +What: /sys/devices/platform/silicom-platform/hwmon/hwmon1/temp1_input
> +Date: November 2023
> +KernelVersion: 6.7
> +Contact: Henry Shi <henrys@...icom-usa.com>
> +Description:
> + This file is read only. It returns the temperature
> + of device in the scale of 1000 * Degree Celsius.
> +
> +What: /sys/devices/platform/silicom-platform/hwmon/hwmon1/temp1_label
> +Date: November 2023
> +KernelVersion: 6.7
> +Contact: Henry Shi <henrys@...icom-usa.com>
> +Description:
> + This file is read only. It returns "Silicom_platform:
> + Thermostat Sensor".
> +
> +What: /sys/devices/platform/silicom-platform/hwmon/hwmon1/fan1_input
> +Date: November 2023
> +KernelVersion: 6.7
> +Contact: Henry Shi <henrys@...icom-usa.com>
> +Description:
> + This file is read only. It returns current fan
> + speed (RPM).
> +
> +What: /sys/devices/platform/silicom-platform/hwmon/hwmon1/fan1_label
> +Date: November 2023
> +KernelVersion: 6.7
> +Contact: Henry Shi <henrys@...icom-usa.com>
> +Description:
> + This file is read only. It returns "Silicom_platform:
> + Fan Speed".
> +
> +What: /sys/class/leds/multicolor:sys/brightness
> +Date: November 2023
> +KernelVersion: 6.7
> +Contact: Henry Shi <henrys@...icom-usa.com>
> +Description:
> + This is a read/write file. It is used to read/set current
> + status of system LED brightness:
> +
> + 0 - to turn off the LED
> + 1 - to turn on the LED
> +
> +What: /sys/class/leds/multicolor:sys/multi_index
> +Date: November 2023
> +KernelVersion: 6.7
> +Contact: Henry Shi <henrys@...icom-usa.com>
> +Description:
> + This is a read only file. It returns:
> +
> + white amber red
> +
> +What: /sys/class/leds/multicolor:sys/multi_intensity
> +Date: November 2023
> +KernelVersion: 6.7
> +Contact: Henry Shi <henrys@...icom-usa.com>
> +Description:
> + This is a read/write file. It is used to read/set current
> + multi-color intensity of system LED: First value for
> + color white, second value for color amber and third value
> + for color red:
> +
> + 0 - The color is turned off.
> + 1 - the color is turned on.
> +
> +What: /sys/class/leds/multicolor:wan/brightness
> +Date: November 2023
> +KernelVersion: 6.7
> +Contact: Henry Shi <henrys@...icom-usa.com>
> +Description:
> + This is a read/write file. It is used to read/set current
> + status of WAN LED brightness:
> +
> + 0 - to turn off the LED
> + 1 - to turn on the LED
> +
> +What: /sys/class/leds/multicolor:wan/multi_index
> +Date: November 2023
> +KernelVersion: 6.7
> +Contact: Henry Shi <henrys@...icom-usa.com>
> +Description:
> + This is a read only file. It returns:
> +
> + white yellow red
> +
> +What: /sys/class/leds/multicolor:wan/multi_intensity
> +Date: November 2023
> +KernelVersion: 6.7
> +Contact: Henry Shi <henrys@...icom-usa.com>
> +Description:
> + This is a read/write file. It is used to read/set current
> + multi-color intensity of WAN LED: First value for
> + color white, second value for color yellow and third value
> + for color red:
> +
> + 0 - The color is turned off.
> + 1 - the color is turned on.
> +
> +What: /sys/class/leds/multicolor:stat%d/brightness
> +Date: November 2023
> +KernelVersion: 6.7
> +Contact: Henry Shi <henrys@...icom-usa.com>
> +Description:
> + This is a read/write file. It is used to read/set current
> + status of device status LED (number %d) brightness:
> +
> + 0 - to turn off the LED
> + 1 - to turn on the LED
> +
> +What: /sys/class/leds/multicolor:stat%d/multi_index
> +Date: November 2023
> +KernelVersion: 6.7
> +Contact: Henry Shi <henrys@...icom-usa.com>
> +Description:
> + This is a read only file. It returns:
> +
> + red green blue yellow
> +
> +What: /sys/class/leds/multicolor:stat%d/multi_intensity
> +Date: November 2023
> +KernelVersion: 6.7
> +Contact: Henry Shi <henrys@...icom-usa.com>
> +Description:
> + This is a read/write file. It is used to read/set current
> + multi-color intensity of device status LED (number %d):
> + First value for color red, second value for color green,
> + third value for color blue and fourth value for color
> + yellow.
> +
> + 0 - The color is turned off.
> + 1 - the color is turned on.
> +
> +What: /sys/class/leds/multicolor:fp_left/brightness
> +Date: November 2023
> +KernelVersion: 6.7
> +Contact: Henry Shi <henrys@...icom-usa.com>
> +Description:
> + This is a read/write file. It is used to read/set current
> + status of left LED brightness:
> +
> + 0 - to turn off the LED
> + 1 - to turn on the LED
> +
> +What: /sys/class/leds/multicolor:fp_left/multi_index
> +Date: November 2023
> +KernelVersion: 6.7
> +Contact: Henry Shi <henrys@...icom-usa.com>
> +Description:
> + This is a read only file. It returns:
> +
> + red green blue amber
> +
> +What: /sys/class/leds/multicolor:fp_left/multi_intensity
> +Date: November 2023
> +KernelVersion: 6.7
> +Contact: Henry Shi <henrys@...icom-usa.com>
> +Description:
> + This is a read/write file. It is used to read/set current
> + multi-color intensity of left LED: First value for
> + color red; Second value for color green; Third value for
> + color blue and fourth value for color amber.
> + for color red:
> +
> + 0 - The color is turned off.
> + 1 - the color is turned on.
> +
> +What: /sys/class/leds/multicolor:fp_center/brightness
> +Date: November 2023
> +KernelVersion: 6.7
> +Contact: Henry Shi <henrys@...icom-usa.com>
> +Description:
> + This is a read/write file. It is used to read/set current
> + status of left LED brightness:
> +
> + 0 - to turn off the LED
> + 1 - to turn on the LED
> +
> +What: /sys/class/leds/multicolor:fp_center/multi_index
> +Date: November 2023
> +KernelVersion: 6.7
> +Contact: Henry Shi <henrys@...icom-usa.com>
> +Description:
> + This is a read only file. It returns:
> +
> + red green blue amber
> +
> +What: /sys/class/leds/multicolor:fp_center/multi_intensity
> +Date: November 2023
> +KernelVersion: 6.7
> +Contact: Henry Shi <henrys@...icom-usa.com>
> +Description:
> + This is a read/write file. It is used to read/set current
> + multi-color intensity of left LED: First value for
> + color red; Second value for color green; Third value for
> + color blue and fourth value for color amber.
> + for color red:
> +
> + 0 - The color is turned off.
> + 1 - the color is turned on.
> +
> +What: /sys/class/leds/multicolor:fp_right/brightness
> +Date: November 2023
> +KernelVersion: 6.7
> +Contact: Henry Shi <henrys@...icom-usa.com>
> +Description:
> + This is a read/write file. It is used to read/set current
> + status of left LED brightness:
> +
> + 0 - to turn off the LED
> + 1 - to turn on the LED
> +
> +What: /sys/class/leds/multicolor:fp_right/multi_index
> +Date: November 2023
> +KernelVersion: 6.7
> +Contact: Henry Shi <henrys@...icom-usa.com>
> +Description:
> + This is a read only file. It returns:
> +
> + red green blue amber
> +
> +What: /sys/class/leds/multicolor:fp_right/multi_intensity
> +Date: November 2023
> +KernelVersion: 6.7
> +Contact: Henry Shi <henrys@...icom-usa.com>
> +Description:
> + This is a read/write file. It is used to read/set current
> + multi-color intensity of left LED: First value for
> + color red; Second value for color green; Third value for
> + color blue and fourth value for color amber.
> + for color red:
> +
> + 0 - The color is turned off.
> + 1 - the color is turned on.
> +
> diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig
> index 2a1070543391..676d89d96646 100644
> --- a/drivers/platform/x86/Kconfig
> +++ b/drivers/platform/x86/Kconfig
> @@ -1076,6 +1076,23 @@ config INTEL_SCU_IPC_UTIL
>
> source "drivers/platform/x86/siemens/Kconfig"
>
> +config SILICOM_PLATFORM
> + tristate "Silicom Edge Networking device support"
> + depends on HWMON
> + depends on GPIOLIB
> + select NEW_LEDS
> + select LEDS_CLASS
> + select LEDS_CLASS_MULTICOLOR
> + help
> + This option enables support for the LEDs/GPIO/etc downstream of the
> + embedded controller on Silicom "Cordoba" hardware and derivatives.
> +
> + This platform driver provides support for various functions via
> + the Linux LED framework, GPIO framework, Hardware Monitoring (HWMON)
> + and device attributes.
> +
> + If you have a Silicom network appliance, say Y or M here.
> +
> config WINMATE_FM07_KEYS
> tristate "Winmate FM07/FM07P front-panel keys driver"
> depends on INPUT
> diff --git a/drivers/platform/x86/Makefile b/drivers/platform/x86/Makefile
> index b457de5abf7d..8fdb0c7d8ca1 100644
> --- a/drivers/platform/x86/Makefile
> +++ b/drivers/platform/x86/Makefile
> @@ -133,6 +133,9 @@ obj-$(CONFIG_X86_INTEL_LPSS) += pmc_atom.o
> # Siemens Simatic Industrial PCs
> obj-$(CONFIG_SIEMENS_SIMATIC_IPC) += siemens/
>
> +# Silicom
> +obj-$(CONFIG_SILICOM_PLATFORM) += silicom-platform.o
> +
> # Winmate
> obj-$(CONFIG_WINMATE_FM07_KEYS) += winmate-fm07-keys.o
>
> diff --git a/drivers/platform/x86/silicom-platform.c b/drivers/platform/x86/silicom-platform.c
> new file mode 100644
> index 000000000000..b9a888aed99e
> --- /dev/null
> +++ b/drivers/platform/x86/silicom-platform.c
> @@ -0,0 +1,1010 @@
> +// SPDX-License-Identifier: GPL-2.0+
> +//
> +// silicom-platform.c - Silicom MEC170x platform driver
> +//
> +// Copyright (C) 2023 Henry Shi <henrys@...icom-usa.com>
> +#include <linux/bitfield.h>
> +#include <linux/bits.h>
> +#include <linux/dmi.h>
> +#include <linux/hwmon.h>
> +#include <linux/init.h>
> +#include <linux/ioport.h>
> +#include <linux/io.h>
> +#include <linux/kernel.h>
> +#include <linux/kobject.h>
> +#include <linux/led-class-multicolor.h>
> +#include <linux/module.h>
> +#include <linux/mutex.h>
> +#include <linux/platform_device.h>
> +#include <linux/string.h>
> +#include <linux/sysfs.h>
> +#include <linux/units.h>
> +
> +#include <linux/gpio/driver.h>
> +
> +#define MEC_POWER_CYCLE_ADDR 0x24
> +#define MEC_EFUSE_LSB_ADDR 0x28
> +#define MEC_GPIO_IN_POS 0x08
> +#define MEC_IO_BASE 0x0800
> +#define MEC_IO_LEN 0x8
> +#define IO_REG_BANK 0x0
> +#define DEFAULT_CHAN_LO 0
> +#define DEFAULT_CHAN_HI 0
> +#define DEFAULT_CHAN_LO_T 0xc
> +#define MEC_ADDR (MEC_IO_BASE + 0x02)
> +#define EC_ADDR_LSB MEC_ADDR
> +#define SILICOM_MEC_MAGIC 0x5a
> +
> +#define MEC_PORT_CHANNEL_MASK GENMASK(2, 0)
> +#define MEC_PORT_DWORD_OFFSET GENMASK(31, 3)
> +#define MEC_DATA_OFFSET_MASK GENMASK(1, 0)
> +#define MEC_PORT_OFFSET_MASK GENMASK(7, 2)
> +
> +#define MEC_TEMP_LOC GENMASK(31, 16)
> +#define MEC_VERSION_LOC GENMASK(15, 8)
> +#define MEC_VERSION_MAJOR GENMASK(15, 14)
> +#define MEC_VERSION_MINOR GENMASK(13, 8)
> +
> +#define EC_ADDR_MSB ((MEC_IO_BASE) + 0x3)
> +#define MEC_DATA_OFFSET(offset) (MEC_IO_BASE + 0x04 + (offset))
> +
> +#define OFFSET_BIT_TO_CHANNEL(off, bit) ((((off) + 0x014) << 3) | (bit))
> +#define CHANNEL_TO_OFFSET(chan) (((chan) >> 3) - 0x14)
> +
> +static DEFINE_MUTEX(mec_io_mutex);
> +static unsigned int efuse_status;
> +static unsigned int mec_uc_version;
> +static unsigned int power_cycle;
> +
> +static const struct hwmon_channel_info *silicom_fan_control_info[] = {
> + HWMON_CHANNEL_INFO(fan, HWMON_F_INPUT | HWMON_F_LABEL),
> + HWMON_CHANNEL_INFO(temp, HWMON_T_INPUT | HWMON_T_LABEL),
> + NULL
> +};
> +
> +struct silicom_platform_info {
> + int io_base;
> + int io_len;
> + struct led_classdev_mc *led_info;
> + struct gpio_chip *gpiochip;
> + u8 *gpio_channels;
> + u16 ngpio;
> +};
> +
> +static const char * const plat_0222_gpio_names[] = {
> + "AUTOM0_SFP_TX_FAULT",
> + "SLOT2_LED_OUT",
> + "SIM_M2_SLOT2_B_DET",
> + "SIM_M2_SLOT2_A_DET",
> + "SLOT1_LED_OUT",
> + "SIM_M2_SLOT1_B_DET",
> + "SIM_M2_SLOT1_A_DET",
> + "SLOT0_LED_OUT",
> + "WAN_SFP0_RX_LOS",
> + "WAN_SFP0_PRSNT_N",
> + "WAN_SFP0_TX_FAULT",
> + "AUTOM1_SFP_RX_LOS",
> + "AUTOM1_SFP_PRSNT_N",
> + "AUTOM1_SFP_TX_FAULT",
> + "AUTOM0_SFP_RX_LOS",
> + "AUTOM0_SFP_PRSNT_N",
> + "WAN_SFP1_RX_LOS",
> + "WAN_SFP1_PRSNT_N",
> + "WAN_SFP1_TX_FAULT",
> + "SIM_M2_SLOT1_MUX_SEL",
> + "W_DISABLE_M2_SLOT1_N",
> + "W_DISABLE_MPCIE_SLOT0_N",
> + "W_DISABLE_M2_SLOT0_N",
> + "BT_COMMAND_MODE",
> + "WAN_SFP1_TX_DISABLE",
> + "WAN_SFP0_TX_DISABLE",
> + "AUTOM1_SFP_TX_DISABLE",
> + "AUTOM0_SFP_TX_DISABLE",
> + "SIM_M2_SLOT2_MUX_SEL",
> + "W_DISABLE_M2_SLOT2_N",
> + "RST_CTL_M2_SLOT_1_N",
> + "RST_CTL_M2_SLOT_2_N",
> + "PM_USB_PWR_EN_BOT",
> + "PM_USB_PWR_EN_TOP",
> +};
> +
> +static u8 plat_0222_gpio_channels[] = {
> + OFFSET_BIT_TO_CHANNEL(0x00, 0),
> + OFFSET_BIT_TO_CHANNEL(0x00, 1),
> + OFFSET_BIT_TO_CHANNEL(0x00, 2),
> + OFFSET_BIT_TO_CHANNEL(0x00, 3),
> + OFFSET_BIT_TO_CHANNEL(0x00, 4),
> + OFFSET_BIT_TO_CHANNEL(0x00, 5),
> + OFFSET_BIT_TO_CHANNEL(0x00, 6),
> + OFFSET_BIT_TO_CHANNEL(0x00, 7),
> + OFFSET_BIT_TO_CHANNEL(0x01, 0),
> + OFFSET_BIT_TO_CHANNEL(0x01, 1),
> + OFFSET_BIT_TO_CHANNEL(0x01, 2),
> + OFFSET_BIT_TO_CHANNEL(0x01, 3),
> + OFFSET_BIT_TO_CHANNEL(0x01, 4),
> + OFFSET_BIT_TO_CHANNEL(0x01, 5),
> + OFFSET_BIT_TO_CHANNEL(0x01, 6),
> + OFFSET_BIT_TO_CHANNEL(0x01, 7),
> + OFFSET_BIT_TO_CHANNEL(0x02, 0),
> + OFFSET_BIT_TO_CHANNEL(0x02, 1),
> + OFFSET_BIT_TO_CHANNEL(0x02, 2),
> + OFFSET_BIT_TO_CHANNEL(0x09, 0),
> + OFFSET_BIT_TO_CHANNEL(0x09, 1),
> + OFFSET_BIT_TO_CHANNEL(0x09, 2),
> + OFFSET_BIT_TO_CHANNEL(0x09, 3),
> + OFFSET_BIT_TO_CHANNEL(0x0a, 0),
> + OFFSET_BIT_TO_CHANNEL(0x0a, 1),
> + OFFSET_BIT_TO_CHANNEL(0x0a, 2),
> + OFFSET_BIT_TO_CHANNEL(0x0a, 3),
> + OFFSET_BIT_TO_CHANNEL(0x0a, 4),
> + OFFSET_BIT_TO_CHANNEL(0x0a, 5),
> + OFFSET_BIT_TO_CHANNEL(0x0a, 6),
> + OFFSET_BIT_TO_CHANNEL(0x0b, 0),
> + OFFSET_BIT_TO_CHANNEL(0x0b, 1),
> + OFFSET_BIT_TO_CHANNEL(0x0b, 2),
> + OFFSET_BIT_TO_CHANNEL(0x0b, 3),
> +};
> +
> +static struct platform_device *silicom_platform_dev;
> +static struct led_classdev_mc *silicom_led_info __initdata;
> +static struct gpio_chip *silicom_gpiochip __initdata;
> +static u8 *silicom_gpio_channels __initdata;
> +
> +static int silicom_mec_port_get(unsigned int offset)
> +{
> + unsigned short mec_data_addr;
> + unsigned short mec_port_addr;
> + u8 reg;
> +
> + mec_data_addr = FIELD_GET(MEC_PORT_DWORD_OFFSET, offset) & MEC_DATA_OFFSET_MASK;
> + mec_port_addr = FIELD_GET(MEC_PORT_DWORD_OFFSET, offset) & MEC_PORT_OFFSET_MASK;
> +
> + mutex_lock(&mec_io_mutex);
> + outb(mec_port_addr, MEC_ADDR);
> + reg = inb(MEC_DATA_OFFSET(mec_data_addr));
> + mutex_unlock(&mec_io_mutex);
> +
> + return (reg >> (offset & MEC_PORT_CHANNEL_MASK)) & 0x01;
> +}
> +
> +static enum led_brightness silicom_mec_led_get(int channel)
> +{
> + /* Outputs are active low */
> + return silicom_mec_port_get(channel) ? LED_OFF : LED_ON;
> +}
> +
> +static void silicom_mec_port_set(int channel, int on)
> +{
> +
> + unsigned short mec_data_addr;
> + unsigned short mec_port_addr;
> + u8 reg;
> +
> + mec_data_addr = FIELD_GET(MEC_PORT_DWORD_OFFSET, channel) & MEC_DATA_OFFSET_MASK;
> + mec_port_addr = FIELD_GET(MEC_PORT_DWORD_OFFSET, channel) & MEC_PORT_OFFSET_MASK;
> +
> + mutex_lock(&mec_io_mutex);
> + outb(mec_port_addr, MEC_ADDR);
> + reg = inb(MEC_DATA_OFFSET(mec_data_addr));
> + /* Outputs are active low, so clear the bit for on, or set it for off */
> + if (on)
> + reg &= ~(1 << (channel & MEC_PORT_CHANNEL_MASK));
> + else
> + reg |= 1 << (channel & MEC_PORT_CHANNEL_MASK);
> + outb(reg, MEC_DATA_OFFSET(mec_data_addr));
> + mutex_unlock(&mec_io_mutex);
> +}
> +
> +static enum led_brightness silicom_mec_led_mc_brightness_get(struct led_classdev *led_cdev)
> +{
> + struct led_classdev_mc *mc_cdev = lcdev_to_mccdev(led_cdev);
> + enum led_brightness brightness = LED_OFF;
> + int i;
> +
> + for (i = 0; i < mc_cdev->num_colors; i++) {
> + mc_cdev->subled_info[i].brightness =
> + silicom_mec_led_get(mc_cdev->subled_info[i].channel);
> + /* Mark the overall brightness as LED_ON if any of the subleds are on */
> + if (mc_cdev->subled_info[i].brightness != LED_OFF)
> + brightness = LED_ON;
> + }
> +
> + return brightness;
> +}
> +
> +static void silicom_mec_led_mc_brightness_set(struct led_classdev *led_cdev,
> + enum led_brightness brightness)
> +{
> + struct led_classdev_mc *mc_cdev = lcdev_to_mccdev(led_cdev);
> + int i;
> +
> + led_mc_calc_color_components(mc_cdev, brightness);
> + for (i = 0; i < mc_cdev->num_colors; i++) {
> + silicom_mec_port_set(mc_cdev->subled_info[i].channel,
> + mc_cdev->subled_info[i].brightness);
> + }
> +}
> +
> +static int silicom_gpio_get_direction(struct gpio_chip *gc,
> + unsigned int offset)
> +{
> + u8 *channels = gpiochip_get_data(gc);
> +
> + /* Input registers have offsets between [0x00, 0x07] */
> + if (CHANNEL_TO_OFFSET(channels[offset]) < MEC_GPIO_IN_POS)
> + return GPIO_LINE_DIRECTION_IN;
> +
> + return GPIO_LINE_DIRECTION_OUT;
> +}
> +
> +static int silicom_gpio_direction_input(struct gpio_chip *gc,
> + unsigned int offset)
> +{
> + int direction = silicom_gpio_get_direction(gc, offset);
> +
> + return direction == GPIO_LINE_DIRECTION_IN ? 0 : -EINVAL;
> +}
> +
> +static void silicom_gpio_set(struct gpio_chip *gc,
> + unsigned int offset,
> + int value)
> +{
> + int direction = silicom_gpio_get_direction(gc, offset);
> + u8 *channels = gpiochip_get_data(gc);
> + int channel = channels[offset];
> +
> + if (direction == GPIO_LINE_DIRECTION_IN)
> + return;
> +
> + if (value)
> + silicom_mec_port_set(channel, 0);
> + else if (value == 0)
> + silicom_mec_port_set(channel, 1);
> + else
> + pr_err("Wrong argument value: %d\n", value);
> +}
> +
> +static int silicom_gpio_direction_output(struct gpio_chip *gc,
> + unsigned int offset,
> + int value)
> +{
> + int direction = silicom_gpio_get_direction(gc, offset);
> +
> + if (direction == GPIO_LINE_DIRECTION_IN)
> + return -EINVAL;
> +
> + silicom_gpio_set(gc, offset, value);
> +
> + return 0;
> +}
> +
> +static int silicom_gpio_get(struct gpio_chip *gc, unsigned int offset)
> +{
> + u8 *channels = gpiochip_get_data(gc);
> + int channel = channels[offset];
> +
> + return silicom_mec_port_get(channel);
> +}
> +
> +static struct mc_subled plat_0222_wan_mc_subled_info[] __initdata = {
> + {
> + .color_index = LED_COLOR_ID_WHITE,
> + .brightness = 1,
> + .intensity = 0,
> + .channel = OFFSET_BIT_TO_CHANNEL(0x0c, 7),
> + },
> + {
> + .color_index = LED_COLOR_ID_YELLOW,
> + .brightness = 1,
> + .intensity = 0,
> + .channel = OFFSET_BIT_TO_CHANNEL(0x0c, 6),
> + },
> + {
> + .color_index = LED_COLOR_ID_RED,
> + .brightness = 1,
> + .intensity = 0,
> + .channel = OFFSET_BIT_TO_CHANNEL(0x0c, 5),
> + },
> +};
> +
> +static struct mc_subled plat_0222_sys_mc_subled_info[] __initdata = {
> + {
> + .color_index = LED_COLOR_ID_WHITE,
> + .brightness = 1,
> + .intensity = 0,
> + .channel = OFFSET_BIT_TO_CHANNEL(0x0c, 4),
> + },
> + {
> + .color_index = LED_COLOR_ID_AMBER,
> + .brightness = 1,
> + .intensity = 0,
> + .channel = OFFSET_BIT_TO_CHANNEL(0x0c, 3),
> + },
> + {
> + .color_index = LED_COLOR_ID_RED,
> + .brightness = 1,
> + .intensity = 0,
> + .channel = OFFSET_BIT_TO_CHANNEL(0x0c, 2),
> + },
> +};
> +
> +static struct mc_subled plat_0222_stat1_mc_subled_info[] __initdata = {
> + {
> + .color_index = LED_COLOR_ID_RED,
> + .brightness = 1,
> + .intensity = 0,
> + .channel = OFFSET_BIT_TO_CHANNEL(0x0c, 1),
> + },
> + {
> + .color_index = LED_COLOR_ID_GREEN,
> + .brightness = 1,
> + .intensity = 0,
> + .channel = OFFSET_BIT_TO_CHANNEL(0x0c, 0),
> + },
> + {
> + .color_index = LED_COLOR_ID_BLUE,
> + .brightness = 1,
> + .intensity = 0,
> + .channel = OFFSET_BIT_TO_CHANNEL(0x0d, 7),
> + },
> + {
> + .color_index = LED_COLOR_ID_YELLOW,
> + .brightness = 1,
> + .intensity = 0,
> + .channel = OFFSET_BIT_TO_CHANNEL(0x0d, 6),
> + },
> +};
> +
> +static struct mc_subled plat_0222_stat2_mc_subled_info[] __initdata = {
> + {
> + .color_index = LED_COLOR_ID_RED,
> + .brightness = 1,
> + .intensity = 0,
> + .channel = OFFSET_BIT_TO_CHANNEL(0x0d, 5),
> + },
> + {
> + .color_index = LED_COLOR_ID_GREEN,
> + .brightness = 1,
> + .intensity = 0,
> + .channel = OFFSET_BIT_TO_CHANNEL(0x0d, 4),
> + },
> + {
> + .color_index = LED_COLOR_ID_BLUE,
> + .brightness = 1,
> + .intensity = 0,
> + .channel = OFFSET_BIT_TO_CHANNEL(0x0d, 3),
> + },
> + {
> + .color_index = LED_COLOR_ID_YELLOW,
> + .brightness = 1,
> + .intensity = 0,
> + .channel = OFFSET_BIT_TO_CHANNEL(0x0d, 2),
> + },
> +};
> +
> +static struct mc_subled plat_0222_stat3_mc_subled_info[] __initdata = {
> + {
> + .color_index = LED_COLOR_ID_RED,
> + .brightness = 1,
> + .intensity = 0,
> + .channel = OFFSET_BIT_TO_CHANNEL(0x0d, 1),
> + },
> + {
> + .color_index = LED_COLOR_ID_GREEN,
> + .brightness = 1,
> + .intensity = 0,
> + .channel = OFFSET_BIT_TO_CHANNEL(0x0d, 0),
> + },
> + {
> + .color_index = LED_COLOR_ID_BLUE,
> + .brightness = 1,
> + .intensity = 0,
> + .channel = OFFSET_BIT_TO_CHANNEL(0x0e, 1),
> + },
> + {
> + .color_index = LED_COLOR_ID_YELLOW,
> + .brightness = 1,
> + .intensity = 0,
> + .channel = OFFSET_BIT_TO_CHANNEL(0x0e, 0),
> + },
> +};
> +
> +static struct led_classdev_mc plat_0222_mc_led_info[] __initdata = {
> + {
> + .led_cdev = {
> + .name = "multicolor:wan",
> + .brightness = 0,
> + .max_brightness = 1,
> + .brightness_set = silicom_mec_led_mc_brightness_set,
> + .brightness_get = silicom_mec_led_mc_brightness_get,
> + },
> + .num_colors = ARRAY_SIZE(plat_0222_wan_mc_subled_info),
> + .subled_info = plat_0222_wan_mc_subled_info,
> + },
> + {
> + .led_cdev = {
> + .name = "multicolor:sys",
> + .brightness = 0,
> + .max_brightness = 1,
> + .brightness_set = silicom_mec_led_mc_brightness_set,
> + .brightness_get = silicom_mec_led_mc_brightness_get,
> + },
> + .num_colors = ARRAY_SIZE(plat_0222_sys_mc_subled_info),
> + .subled_info = plat_0222_sys_mc_subled_info,
> + },
> + {
> + .led_cdev = {
> + .name = "multicolor:stat1",
> + .brightness = 0,
> + .max_brightness = 1,
> + .brightness_set = silicom_mec_led_mc_brightness_set,
> + .brightness_get = silicom_mec_led_mc_brightness_get,
> + },
> + .num_colors = ARRAY_SIZE(plat_0222_stat1_mc_subled_info),
> + .subled_info = plat_0222_stat1_mc_subled_info,
> + },
> + {
> + .led_cdev = {
> + .name = "multicolor:stat2",
> + .brightness = 0,
> + .max_brightness = 1,
> + .brightness_set = silicom_mec_led_mc_brightness_set,
> + .brightness_get = silicom_mec_led_mc_brightness_get,
> + },
> + .num_colors = ARRAY_SIZE(plat_0222_stat2_mc_subled_info),
> + .subled_info = plat_0222_stat2_mc_subled_info,
> + },
> + {
> + .led_cdev = {
> + .name = "multicolor:stat3",
> + .brightness = 0,
> + .max_brightness = 1,
> + .brightness_set = silicom_mec_led_mc_brightness_set,
> + .brightness_get = silicom_mec_led_mc_brightness_get,
> + },
> + .num_colors = ARRAY_SIZE(plat_0222_stat3_mc_subled_info),
> + .subled_info = plat_0222_stat3_mc_subled_info,
> + },
> + { },
> +};
> +
> +static struct gpio_chip silicom_gpio_chip = {
> + .label = "silicom-gpio",
> + .get_direction = silicom_gpio_get_direction,
> + .direction_input = silicom_gpio_direction_input,
> + .direction_output = silicom_gpio_direction_output,
> + .get = silicom_gpio_get,
> + .set = silicom_gpio_set,
> + .base = -1,
> + .ngpio = ARRAY_SIZE(plat_0222_gpio_channels),
> + .names = plat_0222_gpio_names,
> + /*
> + * We're using a mutex to protect the indirect access, so we can sleep
> + * if the lock blocks
> + */
> + .can_sleep = true,
> +};
> +
> +static struct silicom_platform_info silicom_plat_0222_cordoba_info __initdata = {
> + .io_base = MEC_IO_BASE,
> + .io_len = MEC_IO_LEN,
> + .led_info = plat_0222_mc_led_info,
> + .gpiochip = &silicom_gpio_chip,
> + .gpio_channels = plat_0222_gpio_channels,
> + /*
> + * The original generic cordoba does not have the last 4 outputs of the
> + * plat_0222 variant, the rest are the same, so use the same longer list,
> + * but ignore the last entries here
> + */
> + .ngpio = ARRAY_SIZE(plat_0222_gpio_channels),
> +
> +};
> +
> +static struct mc_subled cordoba_fp_left_mc_subled_info[] __initdata = {
> + {
> + .color_index = LED_COLOR_ID_RED,
> + .brightness = 1,
> + .intensity = 0,
> + .channel = OFFSET_BIT_TO_CHANNEL(0x08, 6),
> + },
> + {
> + .color_index = LED_COLOR_ID_GREEN,
> + .brightness = 1,
> + .intensity = 0,
> + .channel = OFFSET_BIT_TO_CHANNEL(0x08, 5),
> + },
> + {
> + .color_index = LED_COLOR_ID_BLUE,
> + .brightness = 1,
> + .intensity = 0,
> + .channel = OFFSET_BIT_TO_CHANNEL(0x09, 7),
> + },
> + {
> + .color_index = LED_COLOR_ID_AMBER,
> + .brightness = 1,
> + .intensity = 0,
> + .channel = OFFSET_BIT_TO_CHANNEL(0x09, 4),
> + },
> +};
> +
> +static struct mc_subled cordoba_fp_center_mc_subled_info[] __initdata = {
> + {
> + .color_index = LED_COLOR_ID_RED,
> + .brightness = 1,
> + .intensity = 0,
> + .channel = OFFSET_BIT_TO_CHANNEL(0x08, 7),
> + },
> + {
> + .color_index = LED_COLOR_ID_GREEN,
> + .brightness = 1,
> + .intensity = 0,
> + .channel = OFFSET_BIT_TO_CHANNEL(0x08, 4),
> + },
> + {
> + .color_index = LED_COLOR_ID_BLUE,
> + .brightness = 1,
> + .intensity = 0,
> + .channel = OFFSET_BIT_TO_CHANNEL(0x08, 3),
> + },
> + {
> + .color_index = LED_COLOR_ID_AMBER,
> + .brightness = 1,
> + .intensity = 0,
> + .channel = OFFSET_BIT_TO_CHANNEL(0x09, 6),
> + },
> +};
> +
> +static struct mc_subled cordoba_fp_right_mc_subled_info[] __initdata = {
> + {
> + .color_index = LED_COLOR_ID_RED,
> + .brightness = 1,
> + .intensity = 0,
> + .channel = OFFSET_BIT_TO_CHANNEL(0x08, 2),
> + },
> + {
> + .color_index = LED_COLOR_ID_GREEN,
> + .brightness = 1,
> + .intensity = 0,
> + .channel = OFFSET_BIT_TO_CHANNEL(0x08, 1),
> + },
> + {
> + .color_index = LED_COLOR_ID_BLUE,
> + .brightness = 1,
> + .intensity = 0,
> + .channel = OFFSET_BIT_TO_CHANNEL(0x08, 0),
> + },
> + {
> + .color_index = LED_COLOR_ID_AMBER,
> + .brightness = 1,
> + .intensity = 0,
> + .channel = OFFSET_BIT_TO_CHANNEL(0x09, 5),
> + },
> +};
> +
> +static struct led_classdev_mc cordoba_mc_led_info[] __initdata = {
> + {
> + .led_cdev = {
> + .name = "multicolor:fp_left",
> + .brightness = 0,
> + .max_brightness = 1,
> + .brightness_set = silicom_mec_led_mc_brightness_set,
> + .brightness_get = silicom_mec_led_mc_brightness_get,
> + },
> + .num_colors = ARRAY_SIZE(cordoba_fp_left_mc_subled_info),
> + .subled_info = cordoba_fp_left_mc_subled_info,
> + },
> + {
> + .led_cdev = {
> + .name = "multicolor:fp_center",
> + .brightness = 0,
> + .max_brightness = 1,
> + .brightness_set = silicom_mec_led_mc_brightness_set,
> + .brightness_get = silicom_mec_led_mc_brightness_get,
> + },
> + .num_colors = ARRAY_SIZE(cordoba_fp_center_mc_subled_info),
> + .subled_info = cordoba_fp_center_mc_subled_info,
> + },
> + {
> + .led_cdev = {
> + .name = "multicolor:fp_right",
> + .brightness = 0,
> + .max_brightness = 1,
> + .brightness_set = silicom_mec_led_mc_brightness_set,
> + .brightness_get = silicom_mec_led_mc_brightness_get,
> + },
> + .num_colors = ARRAY_SIZE(cordoba_fp_right_mc_subled_info),
> + .subled_info = cordoba_fp_right_mc_subled_info,
> + },
> + { },
> +};
> +
> +static struct silicom_platform_info silicom_generic_cordoba_info __initdata = {
> + .io_base = MEC_IO_BASE,
> + .io_len = MEC_IO_LEN,
> + .led_info = cordoba_mc_led_info,
> + .gpiochip = &silicom_gpio_chip,
> + .gpio_channels = plat_0222_gpio_channels,
> + .ngpio = ARRAY_SIZE(plat_0222_gpio_channels),
> +};
> +
> +/*
> + * sysfs interface
> + */
> +static ssize_t efuse_status_show(struct device *dev,
> + struct device_attribute *attr,
> + char *buf)
> +{
> + u32 reg;
> +
> + mutex_lock(&mec_io_mutex);
> + /* Select memory region */
> + outb(IO_REG_BANK, EC_ADDR_MSB);
> + outb(MEC_EFUSE_LSB_ADDR, EC_ADDR_LSB);
> +
> + /* Get current data from the address */
> + reg = inl(MEC_DATA_OFFSET(DEFAULT_CHAN_LO));
> + mutex_unlock(&mec_io_mutex);
> +
> + efuse_status = reg & 0x1;
> +
> + return sysfs_emit(buf, "%u\n", efuse_status);
> +}
> +static DEVICE_ATTR_RO(efuse_status);
> +
> +static ssize_t uc_version_show(struct device *dev,
> + struct device_attribute *attr,
> + char *buf)
> +{
> + int uc_version;
> + u32 reg;
> +
> + mutex_lock(&mec_io_mutex);
> + outb(IO_REG_BANK, EC_ADDR_MSB);
> + outb(DEFAULT_CHAN_LO, EC_ADDR_LSB);
> +
> + reg = inl(MEC_DATA_OFFSET(DEFAULT_CHAN_LO));
> + mutex_unlock(&mec_io_mutex);
> + uc_version = FIELD_GET(MEC_VERSION_LOC, reg);
> + if (uc_version >= 192)
> + return -EINVAL;
> +
> + uc_version = FIELD_GET(MEC_VERSION_MAJOR, reg) * 100 +
> + FIELD_GET(MEC_VERSION_MINOR, reg);
> +
> + mec_uc_version = uc_version;
> +
> + return sysfs_emit(buf, "%u\n", mec_uc_version);
> +}
> +static DEVICE_ATTR_RO(uc_version);
> +
> +static ssize_t power_cycle_show(struct device *dev,
> + struct device_attribute *attr,
> + char *buf)
> +{
> + return sysfs_emit(buf, "%u\n", power_cycle);
> +}
> +
> +static void powercycle_uc(void)
> +{
> + mutex_lock(&mec_io_mutex);
> + /* Select memory region */
> + outb(IO_REG_BANK, EC_ADDR_MSB);
> + outb(MEC_POWER_CYCLE_ADDR, EC_ADDR_LSB);
> +
> + /* Set to 1 for current data from the address */
> + outb(1, MEC_DATA_OFFSET(DEFAULT_CHAN_LO));
> + mutex_unlock(&mec_io_mutex);
> +}
> +
> +static ssize_t power_cycle_store(struct device *dev,
> + struct device_attribute *attr,
> + const char *buf, size_t count)
> +{
> + int rc;
> +
> + rc = kstrtou32(buf, 0, &power_cycle);
> + if (rc)
> + return -EINVAL;
> +
> + if (power_cycle > 0)
> + powercycle_uc();
> +
> + return count;
> +}
> +static DEVICE_ATTR_RW(power_cycle);
> +
> +static struct attribute *silicom_attrs[] = {
> + &dev_attr_efuse_status.attr,
> + &dev_attr_uc_version.attr,
> + &dev_attr_power_cycle.attr,
> + NULL,
> +};
> +ATTRIBUTE_GROUPS(silicom);
> +
> +static struct platform_driver silicom_platform_driver = {
> + .driver = {
> + .name = "silicom-platform",
> + .dev_groups = silicom_groups,
> + },
> +};
> +
> +static int __init silicom_mc_leds_register(struct device *dev,
> + const struct led_classdev_mc *mc_leds)
> +{
> + int size = sizeof(struct mc_subled);
> + struct led_classdev_mc *led;
> + int i, err;
> +
> + for (i = 0; mc_leds[i].led_cdev.name; i++) {
> +
> + led = devm_kzalloc(dev, sizeof(*led), GFP_KERNEL);
> + if (!led)
> + return -ENOMEM;
> + memcpy(led, &mc_leds[i], sizeof(*led));
> +
> + led->subled_info = devm_kzalloc(dev, led->num_colors * size, GFP_KERNEL);
> + if (!led->subled_info)
> + return -ENOMEM;
> + memcpy(led->subled_info, mc_leds[i].subled_info, led->num_colors * size);
> +
> + err = devm_led_classdev_multicolor_register(dev, led);
> + if (err)
> + return err;
> + }
> +
> + return 0;
> +}
> +
> +static u32 rpm_get(void)
> +{
> + u32 reg;
> +
> + mutex_lock(&mec_io_mutex);
> + /* Select memory region */
> + outb(IO_REG_BANK, EC_ADDR_MSB);
> + outb(DEFAULT_CHAN_LO_T, EC_ADDR_LSB);
> + reg = inw(MEC_DATA_OFFSET(DEFAULT_CHAN_LO));
> + mutex_unlock(&mec_io_mutex);
> +
> + return reg;
> +}
> +
> +static u32 temp_get(void)
> +{
> + u32 reg;
> +
> + mutex_lock(&mec_io_mutex);
> + /* Select memory region */
> + outb(IO_REG_BANK, EC_ADDR_MSB);
> + outb(DEFAULT_CHAN_LO_T, EC_ADDR_LSB);
> + reg = inl(MEC_DATA_OFFSET(DEFAULT_CHAN_LO));
> + mutex_unlock(&mec_io_mutex);
> +
> + return FIELD_GET(MEC_TEMP_LOC, reg) * 100;
> +}
> +
> +static umode_t silicom_fan_control_fan_is_visible(const u32 attr)
> +{
> + switch (attr) {
> + case hwmon_fan_input:
> + case hwmon_fan_label:
> + return 0444;
> + default:
> + return 0;
> + }
> +}
> +
> +static umode_t silicom_fan_control_temp_is_visible(const u32 attr)
> +{
> + switch (attr) {
> + case hwmon_temp_input:
> + case hwmon_temp_label:
> + return 0444;
> + default:
> + return 0;
> + }
> +}
> +
> +static int silicom_fan_control_read_fan(struct device *dev, u32 attr, long *val)
> +{
> + switch (attr) {
> + case hwmon_fan_input:
> + *val = rpm_get();
> + return 0;
> + default:
> + return -EOPNOTSUPP;
> + }
> +}
> +
> +static int silicom_fan_control_read_temp(struct device *dev, u32 attr, long *val)
> +{
> + switch (attr) {
> + case hwmon_temp_input:
> + *val = temp_get();
> + return 0;
> + default:
> + return -EOPNOTSUPP;
> + }
> +}
> +
> +static umode_t silicom_fan_control_is_visible(const void *data,
> + enum hwmon_sensor_types type,
> + u32 attr, int channel)
> +{
> + switch (type) {
> + case hwmon_fan:
> + return silicom_fan_control_fan_is_visible(attr);
> + case hwmon_temp:
> + return silicom_fan_control_temp_is_visible(attr);
> + default:
> + return 0;
> + }
> +}
> +
> +static int silicom_fan_control_read(struct device *dev,
> + enum hwmon_sensor_types type,
> + u32 attr, int channel,
> + long *val)
> +{
> + switch (type) {
> + case hwmon_fan:
> + return silicom_fan_control_read_fan(dev, attr, val);
> + case hwmon_temp:
> + return silicom_fan_control_read_temp(dev, attr, val);
> + default:
> + return -EOPNOTSUPP;
> + }
> +}
> +
> +static int silicom_fan_control_read_labels(struct device *dev,
> + enum hwmon_sensor_types type,
> + u32 attr, int channel,
> + const char **str)
> +{
> + switch (type) {
> + case hwmon_fan:
> + *str = "Silicom_platfomr: Fan Speed";
> + return 0;
> + case hwmon_temp:
> + *str = "Silicom_platform: Thermostat Sensor";
> + return 0;
> + default:
> + return -EOPNOTSUPP;
> + }
> +}
> +
> +static const struct hwmon_ops silicom_fan_control_hwmon_ops = {
> + .is_visible = silicom_fan_control_is_visible,
> + .read = silicom_fan_control_read,
> + .read_string = silicom_fan_control_read_labels,
> +};
> +
> +static const struct hwmon_chip_info silicom_chip_info = {
> + .ops = &silicom_fan_control_hwmon_ops,
> + .info = silicom_fan_control_info,
> +};
> +
> +static int __init silicom_platform_probe(struct platform_device *device)
> +{
> + struct device *hwmon_dev;
> + u8 magic, ver;
> + int err;
> +
> + if (!devm_request_region(&device->dev, MEC_IO_BASE, MEC_IO_LEN, "mec")) {
> + dev_err(&device->dev, "couldn't reserve MEC io ports\n");
> + return -EBUSY;
> + }
> +
> + /* Sanity check magic number read for EC */
> + outb(IO_REG_BANK, MEC_ADDR);
> + magic = inb(MEC_DATA_OFFSET(DEFAULT_CHAN_LO));
> + ver = inb(MEC_DATA_OFFSET(DEFAULT_CHAN_HI));
> + dev_dbg(&device->dev, "EC magic 0x%02x, version 0x%02x\n", magic, ver);
> +
> + if (magic != SILICOM_MEC_MAGIC) {
> + dev_err(&device->dev, "Bad EC magic 0x%02x!\n", magic);
> + return -ENODEV;
> + }
> +
> + err = silicom_mc_leds_register(&device->dev, silicom_led_info);
> + if (err) {
> + dev_err(&device->dev, "Failed to register LEDs\n");
> + return err;
> + }
> +
> + err = devm_gpiochip_add_data(&device->dev, silicom_gpiochip,
> + silicom_gpio_channels);
> + if (err) {
> + dev_err(&device->dev, "Failed to register gpiochip: %d\n", err);
> + return err;
> + }
> +
> + hwmon_dev = devm_hwmon_device_register_with_info(&device->dev, "silicom_fan", NULL,
> + &silicom_chip_info, NULL);
> + err = PTR_ERR_OR_ZERO(hwmon_dev);
> + if (err) {
> + dev_err(&device->dev, "Failed to register hwmon_dev: %d\n", err);
> + return err;
> + }
> +
> + return err;
> +}
> +
> +static int __init silicom_platform_info_init(const struct dmi_system_id *id)
> +{
> + struct silicom_platform_info *info = id->driver_data;
> +
> + silicom_led_info = info->led_info;
> + silicom_gpio_channels = info->gpio_channels;
> + silicom_gpiochip = info->gpiochip;
> + silicom_gpiochip->ngpio = info->ngpio;
> +
> + return 1;
> +}
> +
> +static const struct dmi_system_id silicom_dmi_ids[] __initconst = {
> + {
> + .callback = silicom_platform_info_init,
> + .ident = "Silicom Cordoba (Generic)",
> + .matches = {
> + DMI_MATCH(DMI_BOARD_VENDOR, "Silicom"),
> + DMI_MATCH(DMI_BOARD_NAME, "80300-0214-G"),
> + },
> + .driver_data = &silicom_generic_cordoba_info,
> + },
> + {
> + .callback = silicom_platform_info_init,
> + .ident = "Silicom Cordoba (Generic)",
> + .matches = {
> + DMI_MATCH(DMI_BOARD_VENDOR, "Silicom"),
> + DMI_MATCH(DMI_BOARD_NAME, "80500-0214-G"),
> + },
> + .driver_data = &silicom_generic_cordoba_info,
> + },
> + {
> + .callback = silicom_platform_info_init,
> + .ident = "Silicom Cordoba (plat_0222)",
> + .matches = {
> + DMI_MATCH(DMI_BOARD_VENDOR, "Silicom"),
> + DMI_MATCH(DMI_BOARD_NAME, "80300-0222-G"),
> + },
> + .driver_data = &silicom_plat_0222_cordoba_info,
> + },
> + { },
> +};
> +MODULE_DEVICE_TABLE(dmi, silicom_dmi_ids);
> +
> +static int __init silicom_platform_init(void)
> +{
> + if (!dmi_check_system(silicom_dmi_ids)) {
> + pr_err("No DMI match for this platform\n");
> + return -ENODEV;
> + }
> +
> + /*
> + * Create and register a platform device.
> + * Directly probe the platform driver in init since this isn't a
> + * hotpluggable device. That means we don't need to register a driver
> + * that needs to wait around in memory on the chance a matching device
> + * would get added. Instead run once in __init so that we can free all
> + * those resources when the __init region is wiped
> + */
> + silicom_platform_dev = platform_create_bundle(&silicom_platform_driver,
> + silicom_platform_probe,
> + NULL, 0, NULL, 0);
> +
> + return PTR_ERR_OR_ZERO(silicom_platform_dev);
> +}
> +
> +static void __exit silicom_platform_exit(void)
> +{
> + platform_device_unregister(silicom_platform_dev);
> + platform_driver_unregister(&silicom_platform_driver);
> +}
> +
> +module_init(silicom_platform_init);
> +module_exit(silicom_platform_exit);
> +
> +MODULE_LICENSE("GPL");
> +MODULE_AUTHOR("Henry Shi <henrys@...icom-usa.com>");
> +MODULE_DESCRIPTION("Platform driver for Silicom network appliances");
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