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Date: Fri, 18 Aug 2023 11:43:41 -0400
From: Henry Shi <henryshi2018@...il.com>
To: hbshi69@...mail.com, tglx@...utronix.de, mingo@...hat.com,
bp@...en8.de, dave.hansen@...ux.intel.com, x86@...nel.org,
hpa@...or.com, hdegoede@...hat.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: [PATCH] Add Silicom Platform Driver
Signed-off-by: Henry Shi <henryshi2018@...il.com>
---
drivers/platform/x86/Kconfig | 11 +
drivers/platform/x86/Makefile | 1 +
drivers/platform/x86/silicom-platform.c | 1046 +++++++++++++++++++++++
3 files changed, 1058 insertions(+)
create mode 100644 drivers/platform/x86/silicom-platform.c
diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig
index 22052031c719..7680c0dbcd8d 100644
--- a/drivers/platform/x86/Kconfig
+++ b/drivers/platform/x86/Kconfig
@@ -188,6 +188,17 @@ config ACER_WMI
If you have an ACPI-WMI compatible Acer/ Wistron laptop, say Y or M
here.
+config SILICOM_PLATFORM
+ tristate "Silicom Edge Networking device support"
+ depends on DMI
+ select LEDS_CLASS_MULTICOLOR
+ select GPIOLIB
+ help
+ This option enables support for the LEDs/GPIO/etc downstream of the
+ embedded controller on Silicom "Cordoba" hardware and derivatives.
+
+ If you have a Silicom network appliance, say Y or M here.
+
source "drivers/platform/x86/amd/Kconfig"
config ADV_SWBUTTON
diff --git a/drivers/platform/x86/Makefile b/drivers/platform/x86/Makefile
index 2cafe51ec4d8..9355ebbc56ca 100644
--- a/drivers/platform/x86/Makefile
+++ b/drivers/platform/x86/Makefile
@@ -113,6 +113,7 @@ obj-$(CONFIG_SERIAL_MULTI_INSTANTIATE) += serial-multi-instantiate.o
obj-$(CONFIG_MLX_PLATFORM) += mlx-platform.o
obj-$(CONFIG_TOUCHSCREEN_DMI) += touchscreen_dmi.o
obj-$(CONFIG_WIRELESS_HOTKEY) += wireless-hotkey.o
+obj-$(CONFIG_SILICOM_PLATFORM) += silicom-platform.o
obj-$(CONFIG_X86_ANDROID_TABLETS) += x86-android-tablets/
# Intel uncore drivers
diff --git a/drivers/platform/x86/silicom-platform.c b/drivers/platform/x86/silicom-platform.c
new file mode 100644
index 000000000000..ddf9961e2b9e
--- /dev/null
+++ b/drivers/platform/x86/silicom-platform.c
@@ -0,0 +1,1046 @@
+// SPDX-License-Identifier: GPL-2.0+
+//
+// silicom-platform.c - Silicom MEC170x platform driver
+//
+// Copyright (C) 2023 Henry Shi <henrys@...icom-usa.com>
+
+#include <linux/dmi.h>
+#include <linux/gpio/driver.h>
+#include <linux/init.h>
+#include <linux/ioport.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/led-class-multicolor.h>
+#include <linux/module.h>
+#include <linux/hwmon.h>
+#include <linux/mutex.h>
+#include <linux/platform_device.h>
+#include <linux/string.h>
+#include <linux/kobject.h>
+#include <linux/sysfs.h>
+#include <linux/bits.h>
+#include <linux/bitfield.h>
+
+#define MEC_ADDR ((mec_io_base) + 0x02)
+#define MEC_DATA(offset) ((mec_io_base) + 0x04 + (offset))
+#define EC_ADDR_LSB MEC_ADDR
+#define EC_ADDR_MSB ((mec_io_base) + 0x03)
+#define SILICOM_MEC_MAGIC 0x5a
+#define OFFSET_BIT_TO_CHANNEL(off, bit) ((((off) + 0x014) << 3) | (bit))
+#define CHANNEL_TO_OFFSET(chan) (((chan) >> 3) - 0x14)
+#define MEC_VERSION_MAJOR GENMASK(15, 14)
+#define MEC_VERSION_MINOR GENMASK(13, 8)
+#define IO_REG_BANK 0
+#define DEFAULT_CHAN_LO 0
+#define DEFAULT_CHAN_HI 0
+#define MEC_EFUSE_LSB_ADDR 0x28
+#define MEC_POWER_CYCLE_ADDR 0x24
+
+static DEFINE_MUTEX(mec_io_mutex);
+static int mec_io_base, mec_io_len;
+static struct device *my_dev;
+static int efuse_status;
+static int mec_uc_version;
+static int power_cycle;
+
+struct silicom_fan_control_data {
+ struct device *hdev;
+ int temp;
+ int fan_speed;
+};
+
+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)
+{
+ u8 reg;
+
+ mutex_lock(&mec_io_mutex);
+ /* Get the dword offset from the channel */
+ outb((offset >> 3) & 0xfc, MEC_ADDR);
+
+ /* Get the current register */
+ reg = inb(MEC_DATA((offset >> 3) & 0x03));
+ mutex_unlock(&mec_io_mutex);
+
+ return (reg >> (offset & 0x7)) & 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)
+{
+ u8 reg;
+
+ mutex_lock(&mec_io_mutex);
+ /* Get the dword offset from the channel */
+ outb((channel >> 3) & 0xfc, MEC_ADDR);
+ /* Get the current port settings */
+ reg = inb(MEC_DATA((channel >> 3) & 0x03));
+ /* Outputs are active low, so clear the bit for on, or set it for off */
+ if (on)
+ reg &= ~(1 << (channel & 0x7));
+ else
+ reg |= 1 << (channel & 0x7);
+ /* Write back the updated register */
+ outb(reg, MEC_DATA((channel >> 3) & 0x03));
+ 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]) < 0x08)
+ 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)
+{
+ u8 *channels = gpiochip_get_data(gc);
+ int direction = silicom_gpio_get_direction(gc, offset);
+ 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 = 0x800,
+ .io_len = 8,
+ .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
+ * BB 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 = 0x800,
+ .io_len = 8,
+ .led_info = cordoba_mc_led_info,
+ .gpiochip = &silicom_gpio_chip,
+ .gpio_channels = plat_0222_gpio_channels,
+ .ngpio = ARRAY_SIZE(plat_0222_gpio_channels),
+};
+
+static struct platform_driver silicom_platform_driver = {
+ .driver = {
+ .name = "silicom-platform",
+ },
+};
+
+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(DEFAULT_CHAN_LO));
+ mutex_unlock(&mec_io_mutex);
+
+ efuse_status = reg & 0x1;
+
+ return sprintf(buf, "%d\n", efuse_status);
+}
+
+static ssize_t uc_version_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ u32 reg;
+ int uc_version;
+
+ mutex_lock(&mec_io_mutex);
+ outb(IO_REG_BANK, EC_ADDR_MSB);
+ outb(DEFAULT_CHAN_LO, EC_ADDR_LSB);
+
+ reg = inl(MEC_DATA(DEFAULT_CHAN_LO));
+ mutex_unlock(&mec_io_mutex);
+ uc_version = FIELD_GET(GENMASK(15, 8), reg);
+ if (uc_version >= 192)
+ pr_err("uc version not supported\n");
+
+ uc_version = FIELD_GET(MEC_VERSION_MAJOR, reg) * 100 +
+ FIELD_GET(MEC_VERSION_MINOR, reg);
+
+ mec_uc_version = uc_version;
+ return sprintf(buf, "%d\n", mec_uc_version);
+}
+
+static ssize_t power_cycle_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ return sprintf(buf, "%d\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(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)
+{
+ if (sscanf(buf, "%du", &power_cycle) != 1) {
+ dev_err(dev, "Failed to read power_cycle\n");
+ return -EINVAL;
+ }
+ if (power_cycle > 0)
+ powercycle_uc();
+
+ return count;
+}
+
+static struct device_attribute my_dev_attr[] = {
+ {
+ .attr = {.name = "efuse_status", .mode = 0644},
+ .show = efuse_status_show,
+ .store = NULL
+ },
+ {
+ .attr = {.name = "uc_version", .mode = 0644},
+ .show = uc_version_show,
+ .store = NULL
+ },
+ {
+ .attr = {.name = "power_cycle", .mode = 0644},
+ .show = power_cycle_show,
+ .store = power_cycle_store
+ },
+};
+
+static int __init silicom_mc_leds_register(struct device *dev,
+ const struct led_classdev_mc *mc_leds)
+{
+ struct led_classdev_mc *led;
+ int i, err;
+
+ for (i = 0; mc_leds[i].led_cdev.name; i++) {
+ led = devm_kzalloc(dev, sizeof(struct led_classdev_mc), GFP_KERNEL);
+ if (!led)
+ return -ENOMEM;
+ memcpy(led, &mc_leds[i], sizeof(*led));
+
+ led->subled_info = devm_kzalloc(dev, led->num_colors * sizeof(struct mc_subled), GFP_KERNEL);
+ if (!led->subled_info)
+ return -ENOMEM;
+ memcpy(led->subled_info, mc_leds[i].subled_info, led->num_colors * sizeof(struct mc_subled));
+
+ err = devm_led_classdev_multicolor_register(dev, led);
+ if (err) {
+ dev_err(dev, "Failed to register[%d]: %d\n", i, 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(0xc, EC_ADDR_LSB);
+ /* Get current data from the address */
+ reg = inw(MEC_DATA(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(0xc, EC_ADDR_LSB);
+ /* Get current data from the address */
+ reg = inl(MEC_DATA(DEFAULT_CHAN_LO));
+ mutex_unlock(&mec_io_mutex);
+
+ return (reg >> 16) / 10;
+}
+
+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)
+{
+ struct silicom_fan_control_data *ctl = dev_get_drvdata(dev);
+
+ switch (attr) {
+ case hwmon_fan_input:
+ ctl->fan_speed = rpm_get();
+ *val = ctl->fan_speed;
+ 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 = "Fan Speed";
+ return 0;
+ case hwmon_temp:
+ *str = "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,
+ .write = NULL,
+ .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)
+{
+ int i, err;
+ u8 magic, ver;
+ struct silicom_fan_control_data *ctl;
+ const char *name = "Silocom_Fan_Monitor";
+ const char *dev_name = "Silicom_platform";
+
+ mec_io_base = 0x0800;
+ mec_io_len = 8;
+ 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(0x00, MEC_ADDR);
+ magic = inb(MEC_DATA(DEFAULT_CHAN_LO));
+ ver = inb(MEC_DATA(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;
+ }
+
+ ctl = devm_kzalloc(&device->dev, sizeof(*ctl), GFP_KERNEL);
+ if (!ctl)
+ return -ENOMEM;
+
+ ctl->hdev = devm_hwmon_device_register_with_info(&device->dev, name, ctl,
+ &silicom_chip_info, NULL);
+
+ my_dev = root_device_register(dev_name);
+ for (i = 0; i < ARRAY_SIZE(my_dev_attr); i++) {
+ err = sysfs_create_file(&my_dev->kobj, &my_dev_attr[i].attr);
+ if (err) {
+ pr_debug("failed to create the foo file in /sys/devices/Silicom_platform\n");
+ break;
+ }
+ }
+
+ return err;
+}
+
+static int __init silicom_platform_info_init(const struct dmi_system_id *id)
+{
+ struct silicom_platform_info *info = id->driver_data;
+
+ dev_info(&silicom_platform_dev->dev, "Detected %s\n", id->ident);
+
+ mec_io_base = info->io_base;
+ mec_io_len = info->io_len;
+ silicom_led_info = info->led_info;
+ silicom_gpio_channels = info->gpio_channels;
+ silicom_gpiochip = info->gpiochip;
+ if (silicom_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,
+ },
+ { },
+};
+
+static int __init silicom_platform_init(void)
+{
+ struct device *dev;
+ int err;
+
+ /* register a platform device to act as the parent for LEDS, etc. */
+ silicom_platform_dev = platform_device_register_simple("silicom-platform", -1, NULL, 0);
+ if (IS_ERR(silicom_platform_dev)) {
+ err = PTR_ERR(silicom_platform_dev);
+ pr_err("failed to register silicom-platform device: %d\n", err);
+ goto silicom_init_register_err;
+ }
+ dev = &silicom_platform_dev->dev;
+
+ err = dmi_check_system(silicom_dmi_ids);
+ if (err == 0) {
+ dev_err(dev, "No DMI match for this platform\n");
+ err = -ENODEV;
+ goto silicom_init_probe_err;
+ }
+
+ /* 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
+ */
+ err = platform_driver_probe(&silicom_platform_driver, silicom_platform_probe);
+ if (err) {
+ dev_err(dev, "Failed to probe platform driver %d\n", err);
+ goto silicom_init_probe_err;
+ }
+
+ return 0;
+
+silicom_init_probe_err:
+ if (silicom_platform_dev) {
+ platform_device_unregister(silicom_platform_dev);
+ silicom_platform_dev = NULL;
+ }
+ if (my_dev) {
+ root_device_unregister(my_dev);
+ my_dev = NULL;
+ }
+
+silicom_init_register_err:
+ return err;
+}
+
+static void __exit silicom_platform_exit(void)
+{
+ int i;
+
+ if (silicom_platform_dev) {
+ platform_device_unregister(silicom_platform_dev);
+ platform_driver_unregister(&silicom_platform_driver);
+ }
+
+ if (my_dev) {
+ for (i = 0; i < ARRAY_SIZE(my_dev_attr); i++)
+ sysfs_remove_file(&my_dev->kobj, &my_dev_attr[i].attr);
+ root_device_unregister(my_dev);
+ }
+ mutex_destroy(&mec_io_mutex);
+}
+
+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");
+
+MODULE_DEVICE_TABLE(dmi, silicom_dmi_ids);
--
2.21.3
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