// SPDX-License-Identifier: GPL-2.0-only
/****************************************************************************
 * Driver for Solarflare network controllers and boards
 * Copyright 2007-2012 Solarflare Communications Inc.
 */

#include <linux/rtnetlink.h>

#include "net_driver.h"
#include "phy.h"
#include "efx.h"
#include "nic.h"
#include "workarounds.h"

/* Macros for unpacking the board revision */
/* The revision info is in host byte order. */
#define FALCON_BOARD_TYPE(_rev) (_rev >> 8)
#define FALCON_BOARD_MAJOR(_rev) ((_rev >> 4) & 0xf)
#define FALCON_BOARD_MINOR(_rev) (_rev & 0xf)

/* Board types */
#define FALCON_BOARD_SFE4001 0x01
#define FALCON_BOARD_SFE4002 0x02
#define FALCON_BOARD_SFE4003 0x03
#define FALCON_BOARD_SFN4112F 0x52

/* Board temperature is about 15°C above ambient when air flow is
 * limited.  The maximum acceptable ambient temperature varies
 * depending on the PHY specifications but the critical temperature
 * above which we should shut down to avoid damage is 80°C. */
#define FALCON_BOARD_TEMP_BIAS  15
#define FALCON_BOARD_TEMP_CRIT  (80 + FALCON_BOARD_TEMP_BIAS)

/* SFC4000 datasheet says: 'The maximum permitted junction temperature
 * is 125°C; the thermal design of the environment for the SFC4000
 * should aim to keep this well below 100°C.' */
#define FALCON_JUNC_TEMP_MIN    0
#define FALCON_JUNC_TEMP_MAX    90
#define FALCON_JUNC_TEMP_CRIT   125

/*****************************************************************************
 * Support for LM87 sensor chip used on several boards
 */
#define LM87_REG_TEMP_HW_INT_LOCK       0x13
#define LM87_REG_TEMP_HW_EXT_LOCK       0x14
#define LM87_REG_TEMP_HW_INT            0x17
#define LM87_REG_TEMP_HW_EXT            0x18
#define LM87_REG_TEMP_EXT1              0x26
#define LM87_REG_TEMP_INT               0x27
#define LM87_REG_ALARMS1                0x41
#define LM87_REG_ALARMS2                0x42
#define LM87_IN_LIMITS(nr, _min, _max)                  \
        0x2B + (nr) * 2, _max, 0x2C + (nr) * 2, _min
#define LM87_AIN_LIMITS(nr, _min, _max)                 \
        0x3B + (nr), _max, 0x1A + (nr), _min
#define LM87_TEMP_INT_LIMITS(_min, _max)                \
        0x39, _max, 0x3A, _min
#define LM87_TEMP_EXT1_LIMITS(_min, _max)               \
        0x37, _max, 0x38, _min

#define LM87_ALARM_TEMP_INT             0x10
#define LM87_ALARM_TEMP_EXT1            0x20

#if IS_ENABLED(CONFIG_SENSORS_LM87)

static int ef4_poke_lm87(struct i2c_client *client, const u8 *reg_values)
{
        while (*reg_values) {
                u8 reg = *reg_values++;
                u8 value = *reg_values++;
                int rc = i2c_smbus_write_byte_data(client, reg, value);
                if (rc)
                        return rc;
        }
        return 0;
}

static const u8 falcon_lm87_common_regs[] = {
        LM87_REG_TEMP_HW_INT_LOCK, FALCON_BOARD_TEMP_CRIT,
        LM87_REG_TEMP_HW_INT, FALCON_BOARD_TEMP_CRIT,
        LM87_TEMP_EXT1_LIMITS(FALCON_JUNC_TEMP_MIN, FALCON_JUNC_TEMP_MAX),
        LM87_REG_TEMP_HW_EXT_LOCK, FALCON_JUNC_TEMP_CRIT,
        LM87_REG_TEMP_HW_EXT, FALCON_JUNC_TEMP_CRIT,
        0
};

static int ef4_init_lm87(struct ef4_nic *efx, const struct i2c_board_info *info,
                         const u8 *reg_values)
{
        struct falcon_board *board = falcon_board(efx);
        struct i2c_client *client = i2c_new_client_device(&board->i2c_adap, info);
        int rc;

        if (IS_ERR(client))
                return PTR_ERR(client);

        /* Read-to-clear alarm/interrupt status */
        i2c_smbus_read_byte_data(client, LM87_REG_ALARMS1);
        i2c_smbus_read_byte_data(client, LM87_REG_ALARMS2);

        rc = ef4_poke_lm87(client, reg_values);
        if (rc)
                goto err;
        rc = ef4_poke_lm87(client, falcon_lm87_common_regs);
        if (rc)
                goto err;

        board->hwmon_client = client;
        return 0;

err:
        i2c_unregister_device(client);
        return rc;
}

static void ef4_fini_lm87(struct ef4_nic *efx)
{
        i2c_unregister_device(falcon_board(efx)->hwmon_client);
}

static int ef4_check_lm87(struct ef4_nic *efx, unsigned mask)
{
        struct i2c_client *client = falcon_board(efx)->hwmon_client;
        bool temp_crit, elec_fault, is_failure;
        u16 alarms;
        s32 reg;

        /* If link is up then do not monitor temperature */
        if (EF4_WORKAROUND_7884(efx) && efx->link_state.up)
                return 0;

        reg = i2c_smbus_read_byte_data(client, LM87_REG_ALARMS1);
        if (reg < 0)
                return reg;
        alarms = reg;
        reg = i2c_smbus_read_byte_data(client, LM87_REG_ALARMS2);
        if (reg < 0)
                return reg;
        alarms |= reg << 8;
        alarms &= mask;

        temp_crit = false;
        if (alarms & LM87_ALARM_TEMP_INT) {
                reg = i2c_smbus_read_byte_data(client, LM87_REG_TEMP_INT);
                if (reg < 0)
                        return reg;
                if (reg > FALCON_BOARD_TEMP_CRIT)
                        temp_crit = true;
        }
        if (alarms & LM87_ALARM_TEMP_EXT1) {
                reg = i2c_smbus_read_byte_data(client, LM87_REG_TEMP_EXT1);
                if (reg < 0)
                        return reg;
                if (reg > FALCON_JUNC_TEMP_CRIT)
                        temp_crit = true;
        }
        elec_fault = alarms & ~(LM87_ALARM_TEMP_INT | LM87_ALARM_TEMP_EXT1);
        is_failure = temp_crit || elec_fault;

        if (alarms)
                netif_err(efx, hw, efx->net_dev,
                          "LM87 detected a hardware %s (status %02x:%02x)"
                          "%s%s%s%s\n",
                          is_failure ? "failure" : "problem",
                          alarms & 0xff, alarms >> 8,
                          (alarms & LM87_ALARM_TEMP_INT) ?
                          "; board is overheating" : "",
                          (alarms & LM87_ALARM_TEMP_EXT1) ?
                          "; controller is overheating" : "",
                          temp_crit ? "; reached critical temperature" : "",
                          elec_fault ? "; electrical fault" : "");

        return is_failure ? -ERANGE : 0;
}

#else /* !CONFIG_SENSORS_LM87 */

static inline int
ef4_init_lm87(struct ef4_nic *efx, const struct i2c_board_info *info,
              const u8 *reg_values)
{
        return 0;
}
static inline void ef4_fini_lm87(struct ef4_nic *efx)
{
}
static inline int ef4_check_lm87(struct ef4_nic *efx, unsigned mask)
{
        return 0;
}

#endif /* CONFIG_SENSORS_LM87 */

/*****************************************************************************
 * Support for the SFE4001 NIC.
 *
 * The SFE4001 does not power-up fully at reset due to its high power
 * consumption.  We control its power via a PCA9539 I/O expander.
 * It also has a MAX6647 temperature monitor which we expose to
 * the lm90 driver.
 *
 * This also provides minimal support for reflashing the PHY, which is
 * initiated by resetting it with the FLASH_CFG_1 pin pulled down.
 * On SFE4001 rev A2 and later this is connected to the 3V3X output of
 * the IO-expander.
 * We represent reflash mode as PHY_MODE_SPECIAL and make it mutually
 * exclusive with the network device being open.
 */

/**************************************************************************
 * Support for I2C IO Expander device on SFE4001
 */
#define PCA9539 0x74

#define P0_IN 0x00
#define P0_OUT 0x02
#define P0_INVERT 0x04
#define P0_CONFIG 0x06

#define P0_EN_1V0X_LBN 0
#define P0_EN_1V0X_WIDTH 1
#define P0_EN_1V2_LBN 1
#define P0_EN_1V2_WIDTH 1
#define P0_EN_2V5_LBN 2
#define P0_EN_2V5_WIDTH 1
#define P0_EN_3V3X_LBN 3
#define P0_EN_3V3X_WIDTH 1
#define P0_EN_5V_LBN 4
#define P0_EN_5V_WIDTH 1
#define P0_SHORTEN_JTAG_LBN 5
#define P0_SHORTEN_JTAG_WIDTH 1
#define P0_X_TRST_LBN 6
#define P0_X_TRST_WIDTH 1
#define P0_DSP_RESET_LBN 7
#define P0_DSP_RESET_WIDTH 1

#define P1_IN 0x01
#define P1_OUT 0x03
#define P1_INVERT 0x05
#define P1_CONFIG 0x07

#define P1_AFE_PWD_LBN 0
#define P1_AFE_PWD_WIDTH 1
#define P1_DSP_PWD25_LBN 1
#define P1_DSP_PWD25_WIDTH 1
#define P1_RESERVED_LBN 2
#define P1_RESERVED_WIDTH 2
#define P1_SPARE_LBN 4
#define P1_SPARE_WIDTH 4

/* Temperature Sensor */
#define MAX664X_REG_RSL         0x02
#define MAX664X_REG_WLHO        0x0B

static void sfe4001_poweroff(struct ef4_nic *efx)
{
        struct i2c_client *ioexp_client = falcon_board(efx)->ioexp_client;
        struct i2c_client *hwmon_client = falcon_board(efx)->hwmon_client;

        /* Turn off all power rails and disable outputs */
        i2c_smbus_write_byte_data(ioexp_client, P0_OUT, 0xff);
        i2c_smbus_write_byte_data(ioexp_client, P1_CONFIG, 0xff);
        i2c_smbus_write_byte_data(ioexp_client, P0_CONFIG, 0xff);

        /* Clear any over-temperature alert */
        i2c_smbus_read_byte_data(hwmon_client, MAX664X_REG_RSL);
}

static int sfe4001_poweron(struct ef4_nic *efx)
{
        struct i2c_client *ioexp_client = falcon_board(efx)->ioexp_client;
        struct i2c_client *hwmon_client = falcon_board(efx)->hwmon_client;
        unsigned int i, j;
        int rc;
        u8 out;

        /* Clear any previous over-temperature alert */
        rc = i2c_smbus_read_byte_data(hwmon_client, MAX664X_REG_RSL);
        if (rc < 0)
                return rc;

        /* Enable port 0 and port 1 outputs on IO expander */
        rc = i2c_smbus_write_byte_data(ioexp_client, P0_CONFIG, 0x00);
        if (rc)
                return rc;
        rc = i2c_smbus_write_byte_data(ioexp_client, P1_CONFIG,
                                       0xff & ~(1 << P1_SPARE_LBN));
        if (rc)
                goto fail_on;

        /* If PHY power is on, turn it all off and wait 1 second to
         * ensure a full reset.
         */
        rc = i2c_smbus_read_byte_data(ioexp_client, P0_OUT);
        if (rc < 0)
                goto fail_on;
        out = 0xff & ~((0 << P0_EN_1V2_LBN) | (0 << P0_EN_2V5_LBN) |
                       (0 << P0_EN_3V3X_LBN) | (0 << P0_EN_5V_LBN) |
                       (0 << P0_EN_1V0X_LBN));
        if (rc != out) {
                netif_info(efx, hw, efx->net_dev, "power-cycling PHY\n");
                rc = i2c_smbus_write_byte_data(ioexp_client, P0_OUT, out);
                if (rc)
                        goto fail_on;
                schedule_timeout_uninterruptible(HZ);
        }

        for (i = 0; i < 20; ++i) {
                /* Turn on 1.2V, 2.5V, 3.3V and 5V power rails */
                out = 0xff & ~((1 << P0_EN_1V2_LBN) | (1 << P0_EN_2V5_LBN) |
                               (1 << P0_EN_3V3X_LBN) | (1 << P0_EN_5V_LBN) |
                               (1 << P0_X_TRST_LBN));
                if (efx->phy_mode & PHY_MODE_SPECIAL)
                        out |= 1 << P0_EN_3V3X_LBN;

                rc = i2c_smbus_write_byte_data(ioexp_client, P0_OUT, out);
                if (rc)
                        goto fail_on;
                msleep(10);

                /* Turn on 1V power rail */
                out &= ~(1 << P0_EN_1V0X_LBN);
                rc = i2c_smbus_write_byte_data(ioexp_client, P0_OUT, out);
                if (rc)
                        goto fail_on;

                netif_info(efx, hw, efx->net_dev,
                           "waiting for DSP boot (attempt %d)...\n", i);

                /* In flash config mode, DSP does not turn on AFE, so
                 * just wait 1 second.
                 */
                if (efx->phy_mode & PHY_MODE_SPECIAL) {
                        schedule_timeout_uninterruptible(HZ);
                        return 0;
                }

                for (j = 0; j < 10; ++j) {
                        msleep(100);

                        /* Check DSP has asserted AFE power line */
                        rc = i2c_smbus_read_byte_data(ioexp_client, P1_IN);
                        if (rc < 0)
                                goto fail_on;
                        if (rc & (1 << P1_AFE_PWD_LBN))
                                return 0;
                }
        }

        netif_info(efx, hw, efx->net_dev, "timed out waiting for DSP boot\n");
        rc = -ETIMEDOUT;
fail_on:
        sfe4001_poweroff(efx);
        return rc;
}

static ssize_t phy_flash_cfg_show(struct device *dev,
                                  struct device_attribute *attr, char *buf)
{
        struct ef4_nic *efx = dev_get_drvdata(dev);
        return sprintf(buf, "%d\n", !!(efx->phy_mode & PHY_MODE_SPECIAL));
}

static ssize_t phy_flash_cfg_store(struct device *dev,
                                   struct device_attribute *attr,
                                   const char *buf, size_t count)
{
        struct ef4_nic *efx = dev_get_drvdata(dev);
        enum ef4_phy_mode old_mode, new_mode;
        int err;

        rtnl_lock();
        old_mode = efx->phy_mode;
        if (count == 0 || *buf == '0')
                new_mode = old_mode & ~PHY_MODE_SPECIAL;
        else
                new_mode = PHY_MODE_SPECIAL;
        if (!((old_mode ^ new_mode) & PHY_MODE_SPECIAL)) {
                err = 0;
        } else if (efx->state != STATE_READY || netif_running(efx->net_dev)) {
                err = -EBUSY;
        } else {
                /* Reset the PHY, reconfigure the MAC and enable/disable
                 * MAC stats accordingly. */
                efx->phy_mode = new_mode;
                if (new_mode & PHY_MODE_SPECIAL)
                        falcon_stop_nic_stats(efx);
                err = sfe4001_poweron(efx);
                if (!err)
                        err = ef4_reconfigure_port(efx);
                if (!(new_mode & PHY_MODE_SPECIAL))
                        falcon_start_nic_stats(efx);
        }
        rtnl_unlock();

        return err ? err : count;
}

static DEVICE_ATTR_RW(phy_flash_cfg);

static void sfe4001_fini(struct ef4_nic *efx)
{
        struct falcon_board *board = falcon_board(efx);

        netif_info(efx, drv, efx->net_dev, "%s\n", __func__);

        device_remove_file(&efx->pci_dev->dev, &dev_attr_phy_flash_cfg);
        sfe4001_poweroff(efx);
        i2c_unregister_device(board->ioexp_client);
        i2c_unregister_device(board->hwmon_client);
}

static int sfe4001_check_hw(struct ef4_nic *efx)
{
        struct falcon_nic_data *nic_data = efx->nic_data;
        s32 status;

        /* If XAUI link is up then do not monitor */
        if (EF4_WORKAROUND_7884(efx) && !nic_data->xmac_poll_required)
                return 0;

        /* Check the powered status of the PHY. Lack of power implies that
         * the MAX6647 has shut down power to it, probably due to a temp.
         * alarm. Reading the power status rather than the MAX6647 status
         * directly because the later is read-to-clear and would thus
         * start to power up the PHY again when polled, causing us to blip
         * the power undesirably.
         * We know we can read from the IO expander because we did
         * it during power-on. Assume failure now is bad news. */
        status = i2c_smbus_read_byte_data(falcon_board(efx)->ioexp_client, P1_IN);
        if (status >= 0 &&
            (status & ((1 << P1_AFE_PWD_LBN) | (1 << P1_DSP_PWD25_LBN))) != 0)
                return 0;

        /* Use board power control, not PHY power control */
        sfe4001_poweroff(efx);
        efx->phy_mode = PHY_MODE_OFF;

        return (status < 0) ? -EIO : -ERANGE;
}

static const struct i2c_board_info sfe4001_hwmon_info = {
        I2C_BOARD_INFO("max6647", 0x4e),
};

/* This board uses an I2C expander to provider power to the PHY, which needs to
 * be turned on before the PHY can be used.
 * Context: Process context, rtnl lock held
 */
static int sfe4001_init(struct ef4_nic *efx)
{
        struct falcon_board *board = falcon_board(efx);
        int rc;

#if IS_ENABLED(CONFIG_SENSORS_LM90)
        board->hwmon_client =
                i2c_new_client_device(&board->i2c_adap, &sfe4001_hwmon_info);
#else
        board->hwmon_client =
                i2c_new_dummy_device(&board->i2c_adap, sfe4001_hwmon_info.addr);
#endif
        if (IS_ERR(board->hwmon_client))
                return PTR_ERR(board->hwmon_client);

        /* Raise board/PHY high limit from 85 to 90 degrees Celsius */
        rc = i2c_smbus_write_byte_data(board->hwmon_client,
                                       MAX664X_REG_WLHO, 90);
        if (rc)
                goto fail_hwmon;

        board->ioexp_client = i2c_new_dummy_device(&board->i2c_adap, PCA9539);
        if (IS_ERR(board->ioexp_client)) {
                rc = PTR_ERR(board->ioexp_client);
                goto fail_hwmon;
        }

        if (efx->phy_mode & PHY_MODE_SPECIAL) {
                /* PHY won't generate a 156.25 MHz clock and MAC stats fetch
                 * will fail. */
                falcon_stop_nic_stats(efx);
        }
        rc = sfe4001_poweron(efx);
        if (rc)
                goto fail_ioexp;

        rc = device_create_file(&efx->pci_dev->dev, &dev_attr_phy_flash_cfg);
        if (rc)
                goto fail_on;

        netif_info(efx, hw, efx->net_dev, "PHY is powered on\n");
        return 0;

fail_on:
        sfe4001_poweroff(efx);
fail_ioexp:
        i2c_unregister_device(board->ioexp_client);
fail_hwmon:
        i2c_unregister_device(board->hwmon_client);
        return rc;
}

/*****************************************************************************
 * Support for the SFE4002
 *
 */
static u8 sfe4002_lm87_channel = 0x03; /* use AIN not FAN inputs */

static const u8 sfe4002_lm87_regs[] = {
        LM87_IN_LIMITS(0, 0x7c, 0x99),          /* 2.5V:  1.8V +/- 10% */
        LM87_IN_LIMITS(1, 0x4c, 0x5e),          /* Vccp1: 1.2V +/- 10% */
        LM87_IN_LIMITS(2, 0xac, 0xd4),          /* 3.3V:  3.3V +/- 10% */
        LM87_IN_LIMITS(3, 0xac, 0xd4),          /* 5V:    5.0V +/- 10% */
        LM87_IN_LIMITS(4, 0xac, 0xe0),          /* 12V:   10.8-14V */
        LM87_IN_LIMITS(5, 0x3f, 0x4f),          /* Vccp2: 1.0V +/- 10% */
        LM87_AIN_LIMITS(0, 0x98, 0xbb),         /* AIN1:  1.66V +/- 10% */
        LM87_AIN_LIMITS(1, 0x8a, 0xa9),         /* AIN2:  1.5V +/- 10% */
        LM87_TEMP_INT_LIMITS(0, 80 + FALCON_BOARD_TEMP_BIAS),
        LM87_TEMP_EXT1_LIMITS(0, FALCON_JUNC_TEMP_MAX),
        0
};

static const struct i2c_board_info sfe4002_hwmon_info = {
        I2C_BOARD_INFO("lm87", 0x2e),
        .platform_data  = &sfe4002_lm87_channel,
};

/****************************************************************************/
/* LED allocations. Note that on rev A0 boards the schematic and the reality
 * differ: red and green are swapped. Below is the fixed (A1) layout (there
 * are only 3 A0 boards in existence, so no real reason to make this
 * conditional).
 */
#define SFE4002_FAULT_LED (2)   /* Red */
#define SFE4002_RX_LED    (0)   /* Green */
#define SFE4002_TX_LED    (1)   /* Amber */

static void sfe4002_init_phy(struct ef4_nic *efx)
{
        /* Set the TX and RX LEDs to reflect status and activity, and the
         * fault LED off */
        falcon_qt202x_set_led(efx, SFE4002_TX_LED,
                              QUAKE_LED_TXLINK | QUAKE_LED_LINK_ACTSTAT);
        falcon_qt202x_set_led(efx, SFE4002_RX_LED,
                              QUAKE_LED_RXLINK | QUAKE_LED_LINK_ACTSTAT);
        falcon_qt202x_set_led(efx, SFE4002_FAULT_LED, QUAKE_LED_OFF);
}

static void sfe4002_set_id_led(struct ef4_nic *efx, enum ef4_led_mode mode)
{
        falcon_qt202x_set_led(
                efx, SFE4002_FAULT_LED,
                (mode == EF4_LED_ON) ? QUAKE_LED_ON : QUAKE_LED_OFF);
}

static int sfe4002_check_hw(struct ef4_nic *efx)
{
        struct falcon_board *board = falcon_board(efx);

        /* A0 board rev. 4002s report a temperature fault the whole time
         * (bad sensor) so we mask it out. */
        unsigned alarm_mask =
                (board->major == 0 && board->minor == 0) ?
                ~LM87_ALARM_TEMP_EXT1 : ~0;

        return ef4_check_lm87(efx, alarm_mask);
}

static int sfe4002_init(struct ef4_nic *efx)
{
        return ef4_init_lm87(efx, &sfe4002_hwmon_info, sfe4002_lm87_regs);
}

/*****************************************************************************
 * Support for the SFN4112F
 *
 */
static u8 sfn4112f_lm87_channel = 0x03; /* use AIN not FAN inputs */

static const u8 sfn4112f_lm87_regs[] = {
        LM87_IN_LIMITS(0, 0x7c, 0x99),          /* 2.5V:  1.8V +/- 10% */
        LM87_IN_LIMITS(1, 0x4c, 0x5e),          /* Vccp1: 1.2V +/- 10% */
        LM87_IN_LIMITS(2, 0xac, 0xd4),          /* 3.3V:  3.3V +/- 10% */
        LM87_IN_LIMITS(4, 0xac, 0xe0),          /* 12V:   10.8-14V */
        LM87_IN_LIMITS(5, 0x3f, 0x4f),          /* Vccp2: 1.0V +/- 10% */
        LM87_AIN_LIMITS(1, 0x8a, 0xa9),         /* AIN2:  1.5V +/- 10% */
        LM87_TEMP_INT_LIMITS(0, 60 + FALCON_BOARD_TEMP_BIAS),
        LM87_TEMP_EXT1_LIMITS(0, FALCON_JUNC_TEMP_MAX),
        0
};

static const struct i2c_board_info sfn4112f_hwmon_info = {
        I2C_BOARD_INFO("lm87", 0x2e),
        .platform_data  = &sfn4112f_lm87_channel,
};

#define SFN4112F_ACT_LED        0
#define SFN4112F_LINK_LED       1

static void sfn4112f_init_phy(struct ef4_nic *efx)
{
        falcon_qt202x_set_led(efx, SFN4112F_ACT_LED,
                              QUAKE_LED_RXLINK | QUAKE_LED_LINK_ACT);
        falcon_qt202x_set_led(efx, SFN4112F_LINK_LED,
                              QUAKE_LED_RXLINK | QUAKE_LED_LINK_STAT);
}

static void sfn4112f_set_id_led(struct ef4_nic *efx, enum ef4_led_mode mode)
{
        int reg;

        switch (mode) {
        case EF4_LED_OFF:
                reg = QUAKE_LED_OFF;
                break;
        case EF4_LED_ON:
                reg = QUAKE_LED_ON;
                break;
        default:
                reg = QUAKE_LED_RXLINK | QUAKE_LED_LINK_STAT;
                break;
        }

        falcon_qt202x_set_led(efx, SFN4112F_LINK_LED, reg);
}

static int sfn4112f_check_hw(struct ef4_nic *efx)
{
        /* Mask out unused sensors */
        return ef4_check_lm87(efx, ~0x48);
}

static int sfn4112f_init(struct ef4_nic *efx)
{
        return ef4_init_lm87(efx, &sfn4112f_hwmon_info, sfn4112f_lm87_regs);
}

/*****************************************************************************
 * Support for the SFE4003
 *
 */
static u8 sfe4003_lm87_channel = 0x03; /* use AIN not FAN inputs */

static const u8 sfe4003_lm87_regs[] = {
        LM87_IN_LIMITS(0, 0x67, 0x7f),          /* 2.5V:  1.5V +/- 10% */
        LM87_IN_LIMITS(1, 0x4c, 0x5e),          /* Vccp1: 1.2V +/- 10% */
        LM87_IN_LIMITS(2, 0xac, 0xd4),          /* 3.3V:  3.3V +/- 10% */
        LM87_IN_LIMITS(4, 0xac, 0xe0),          /* 12V:   10.8-14V */
        LM87_IN_LIMITS(5, 0x3f, 0x4f),          /* Vccp2: 1.0V +/- 10% */
        LM87_TEMP_INT_LIMITS(0, 70 + FALCON_BOARD_TEMP_BIAS),
        0
};

static const struct i2c_board_info sfe4003_hwmon_info = {
        I2C_BOARD_INFO("lm87", 0x2e),
        .platform_data  = &sfe4003_lm87_channel,
};

/* Board-specific LED info. */
#define SFE4003_RED_LED_GPIO    11
#define SFE4003_LED_ON          1
#define SFE4003_LED_OFF         0

static void sfe4003_set_id_led(struct ef4_nic *efx, enum ef4_led_mode mode)
{
        struct falcon_board *board = falcon_board(efx);

        /* The LEDs were not wired to GPIOs before A3 */
        if (board->minor < 3 && board->major == 0)
                return;

        falcon_txc_set_gpio_val(
                efx, SFE4003_RED_LED_GPIO,
                (mode == EF4_LED_ON) ? SFE4003_LED_ON : SFE4003_LED_OFF);
}

static void sfe4003_init_phy(struct ef4_nic *efx)
{
        struct falcon_board *board = falcon_board(efx);

        /* The LEDs were not wired to GPIOs before A3 */
        if (board->minor < 3 && board->major == 0)
                return;

        falcon_txc_set_gpio_dir(efx, SFE4003_RED_LED_GPIO, TXC_GPIO_DIR_OUTPUT);
        falcon_txc_set_gpio_val(efx, SFE4003_RED_LED_GPIO, SFE4003_LED_OFF);
}

static int sfe4003_check_hw(struct ef4_nic *efx)
{
        struct falcon_board *board = falcon_board(efx);

        /* A0/A1/A2 board rev. 4003s  report a temperature fault the whole time
         * (bad sensor) so we mask it out. */
        unsigned alarm_mask =
                (board->major == 0 && board->minor <= 2) ?
                ~LM87_ALARM_TEMP_EXT1 : ~0;

        return ef4_check_lm87(efx, alarm_mask);
}

static int sfe4003_init(struct ef4_nic *efx)
{
        return ef4_init_lm87(efx, &sfe4003_hwmon_info, sfe4003_lm87_regs);
}

static const struct falcon_board_type board_types[] = {
        {
                .id             = FALCON_BOARD_SFE4001,
                .init           = sfe4001_init,
                .init_phy       = ef4_port_dummy_op_void,
                .fini           = sfe4001_fini,
                .set_id_led     = tenxpress_set_id_led,
                .monitor        = sfe4001_check_hw,
        },
        {
                .id             = FALCON_BOARD_SFE4002,
                .init           = sfe4002_init,
                .init_phy       = sfe4002_init_phy,
                .fini           = ef4_fini_lm87,
                .set_id_led     = sfe4002_set_id_led,
                .monitor        = sfe4002_check_hw,
        },
        {
                .id             = FALCON_BOARD_SFE4003,
                .init           = sfe4003_init,
                .init_phy       = sfe4003_init_phy,
                .fini           = ef4_fini_lm87,
                .set_id_led     = sfe4003_set_id_led,
                .monitor        = sfe4003_check_hw,
        },
        {
                .id             = FALCON_BOARD_SFN4112F,
                .init           = sfn4112f_init,
                .init_phy       = sfn4112f_init_phy,
                .fini           = ef4_fini_lm87,
                .set_id_led     = sfn4112f_set_id_led,
                .monitor        = sfn4112f_check_hw,
        },
};

int falcon_probe_board(struct ef4_nic *efx, u16 revision_info)
{
        struct falcon_board *board = falcon_board(efx);
        u8 type_id = FALCON_BOARD_TYPE(revision_info);
        int i;

        board->major = FALCON_BOARD_MAJOR(revision_info);
        board->minor = FALCON_BOARD_MINOR(revision_info);

        for (i = 0; i < ARRAY_SIZE(board_types); i++)
                if (board_types[i].id == type_id)
                        board->type = &board_types[i];

        if (board->type) {
                return 0;
        } else {
                netif_err(efx, probe, efx->net_dev, "unknown board type %d\n",
                          type_id);
                return -ENODEV;
        }
}