diff options
Diffstat (limited to 'drivers/platform/x86/silicom-platform.c')
| -rw-r--r-- | drivers/platform/x86/silicom-platform.c | 1004 |
1 files changed, 1004 insertions, 0 deletions
diff --git a/drivers/platform/x86/silicom-platform.c b/drivers/platform/x86/silicom-platform.c new file mode 100644 index 000000000000..6ce43ccb3112 --- /dev/null +++ b/drivers/platform/x86/silicom-platform.c @@ -0,0 +1,1004 @@ +// SPDX-License-Identifier: GPL-2.0+ +// +// silicom-platform.c - Silicom MEC170x platform driver +// +// Copyright (C) 2023 Henry Shi <henrys@silicom-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 = "platled::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 = "platled::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 = "platled::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 = "platled::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 = "platled::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 = "platled::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 = "platled::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 = "platled::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) +{ + /* 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)); +} + +static ssize_t power_cycle_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + int rc; + unsigned int power_cycle_cmd; + + rc = kstrtou32(buf, 0, &power_cycle_cmd); + if (rc) + return -EINVAL; + + if (power_cycle_cmd > 0) { + mutex_lock(&mec_io_mutex); + power_cycle = power_cycle_cmd; + powercycle_uc(); + mutex_unlock(&mec_io_mutex); + } + + 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_platform: 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; + } + 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@silicom-usa.com>"); +MODULE_DESCRIPTION("Platform driver for Silicom network appliances"); |