// SPDX-License-Identifier: GPL-2.0+ /* * Nvidia line card driver * * Copyright (C) 2020 Nvidia Technologies Ltd. */ #include #include #include #include #include #include #include /* I2C bus IO offsets */ #define MLXREG_LC_REG_CPLD1_VER_OFFSET 0x2500 #define MLXREG_LC_REG_FPGA1_VER_OFFSET 0x2501 #define MLXREG_LC_REG_CPLD1_PN_OFFSET 0x2504 #define MLXREG_LC_REG_FPGA1_PN_OFFSET 0x2506 #define MLXREG_LC_REG_RESET_CAUSE_OFFSET 0x251d #define MLXREG_LC_REG_LED1_OFFSET 0x2520 #define MLXREG_LC_REG_GP0_OFFSET 0x252e #define MLXREG_LC_REG_FIELD_UPGRADE 0x2534 #define MLXREG_LC_CHANNEL_I2C_REG 0x25dc #define MLXREG_LC_REG_CPLD1_MVER_OFFSET 0x25de #define MLXREG_LC_REG_FPGA1_MVER_OFFSET 0x25df #define MLXREG_LC_REG_MAX_POWER_OFFSET 0x25f1 #define MLXREG_LC_REG_CONFIG_OFFSET 0x25fb #define MLXREG_LC_REG_MAX 0x3fff /** * enum mlxreg_lc_type - line cards types * * @MLXREG_LC_SN4800_C16: 100GbE line card with 16 QSFP28 ports; */ enum mlxreg_lc_type { MLXREG_LC_SN4800_C16 = 0x0000, }; /** * enum mlxreg_lc_state - line cards state * * @MLXREG_LC_INITIALIZED: line card is initialized; * @MLXREG_LC_POWERED: line card is powered; * @MLXREG_LC_SYNCED: line card is synchronized between hardware and firmware; */ enum mlxreg_lc_state { MLXREG_LC_INITIALIZED = BIT(0), MLXREG_LC_POWERED = BIT(1), MLXREG_LC_SYNCED = BIT(2), }; #define MLXREG_LC_CONFIGURED (MLXREG_LC_INITIALIZED | MLXREG_LC_POWERED | MLXREG_LC_SYNCED) /* mlxreg_lc - device private data * @dev: platform device; * @lock: line card lock; * @par_regmap: parent device regmap handle; * @data: pltaform core data; * @io_data: register access platform data; * @led_data: LED platform data ; * @mux_data: MUX platform data; * @led: LED device; * @io_regs: register access device; * @mux_brdinfo: mux configuration; * @mux: mux devices; * @aux_devs: I2C devices feeding by auxiliary power; * @aux_devs_num: number of I2C devices feeding by auxiliary power; * @main_devs: I2C devices feeding by main power; * @main_devs_num: number of I2C devices feeding by main power; * @state: line card state; */ struct mlxreg_lc { struct device *dev; struct mutex lock; /* line card access lock */ void *par_regmap; struct mlxreg_core_data *data; struct mlxreg_core_platform_data *io_data; struct mlxreg_core_platform_data *led_data; struct mlxcpld_mux_plat_data *mux_data; struct platform_device *led; struct platform_device *io_regs; struct i2c_board_info *mux_brdinfo; struct platform_device *mux; struct mlxreg_hotplug_device *aux_devs; int aux_devs_num; struct mlxreg_hotplug_device *main_devs; int main_devs_num; enum mlxreg_lc_state state; }; static bool mlxreg_lc_writeable_reg(struct device *dev, unsigned int reg) { switch (reg) { case MLXREG_LC_REG_LED1_OFFSET: case MLXREG_LC_REG_GP0_OFFSET: case MLXREG_LC_REG_FIELD_UPGRADE: case MLXREG_LC_CHANNEL_I2C_REG: return true; } return false; } static bool mlxreg_lc_readable_reg(struct device *dev, unsigned int reg) { switch (reg) { case MLXREG_LC_REG_CPLD1_VER_OFFSET: case MLXREG_LC_REG_FPGA1_VER_OFFSET: case MLXREG_LC_REG_CPLD1_PN_OFFSET: case MLXREG_LC_REG_FPGA1_PN_OFFSET: case MLXREG_LC_REG_RESET_CAUSE_OFFSET: case MLXREG_LC_REG_LED1_OFFSET: case MLXREG_LC_REG_GP0_OFFSET: case MLXREG_LC_REG_FIELD_UPGRADE: case MLXREG_LC_CHANNEL_I2C_REG: case MLXREG_LC_REG_CPLD1_MVER_OFFSET: case MLXREG_LC_REG_FPGA1_MVER_OFFSET: case MLXREG_LC_REG_MAX_POWER_OFFSET: case MLXREG_LC_REG_CONFIG_OFFSET: return true; } return false; } static bool mlxreg_lc_volatile_reg(struct device *dev, unsigned int reg) { switch (reg) { case MLXREG_LC_REG_CPLD1_VER_OFFSET: case MLXREG_LC_REG_FPGA1_VER_OFFSET: case MLXREG_LC_REG_CPLD1_PN_OFFSET: case MLXREG_LC_REG_FPGA1_PN_OFFSET: case MLXREG_LC_REG_RESET_CAUSE_OFFSET: case MLXREG_LC_REG_LED1_OFFSET: case MLXREG_LC_REG_GP0_OFFSET: case MLXREG_LC_REG_FIELD_UPGRADE: case MLXREG_LC_CHANNEL_I2C_REG: case MLXREG_LC_REG_CPLD1_MVER_OFFSET: case MLXREG_LC_REG_FPGA1_MVER_OFFSET: case MLXREG_LC_REG_MAX_POWER_OFFSET: case MLXREG_LC_REG_CONFIG_OFFSET: return true; } return false; } static const struct reg_default mlxreg_lc_regmap_default[] = { { MLXREG_LC_CHANNEL_I2C_REG, 0x00 }, }; /* Configuration for the register map of a device with 2 bytes address space. */ static const struct regmap_config mlxreg_lc_regmap_conf = { .reg_bits = 16, .val_bits = 8, .max_register = MLXREG_LC_REG_MAX, .cache_type = REGCACHE_FLAT, .writeable_reg = mlxreg_lc_writeable_reg, .readable_reg = mlxreg_lc_readable_reg, .volatile_reg = mlxreg_lc_volatile_reg, .reg_defaults = mlxreg_lc_regmap_default, .num_reg_defaults = ARRAY_SIZE(mlxreg_lc_regmap_default), }; /* Default channels vector. * It contains only the channels, which physically connected to the devices, * empty channels are skipped. */ static int mlxreg_lc_chan[] = { 0x04, 0x05, 0x06, 0x07, 0x08, 0x10, 0x20, 0x21, 0x22, 0x23, 0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f }; /* Defaul mux configuration. */ static struct mlxcpld_mux_plat_data mlxreg_lc_mux_data[] = { { .chan_ids = mlxreg_lc_chan, .num_adaps = ARRAY_SIZE(mlxreg_lc_chan), .sel_reg_addr = MLXREG_LC_CHANNEL_I2C_REG, .reg_size = 2, }, }; /* Defaul mux board info. */ static struct i2c_board_info mlxreg_lc_mux_brdinfo = { I2C_BOARD_INFO("i2c-mux-mlxcpld", 0x32), }; /* Line card default auxiliary power static devices. */ static struct i2c_board_info mlxreg_lc_aux_pwr_devices[] = { { I2C_BOARD_INFO("24c32", 0x51), }, { I2C_BOARD_INFO("24c32", 0x51), }, }; /* Line card default auxiliary power board info. */ static struct mlxreg_hotplug_device mlxreg_lc_aux_pwr_brdinfo[] = { { .brdinfo = &mlxreg_lc_aux_pwr_devices[0], .nr = 3, }, { .brdinfo = &mlxreg_lc_aux_pwr_devices[1], .nr = 4, }, }; /* Line card default main power static devices. */ static struct i2c_board_info mlxreg_lc_main_pwr_devices[] = { { I2C_BOARD_INFO("mp2975", 0x62), }, { I2C_BOARD_INFO("mp2975", 0x64), }, { I2C_BOARD_INFO("max11603", 0x6d), }, { I2C_BOARD_INFO("lm25066", 0x15), }, }; /* Line card default main power board info. */ static struct mlxreg_hotplug_device mlxreg_lc_main_pwr_brdinfo[] = { { .brdinfo = &mlxreg_lc_main_pwr_devices[0], .nr = 0, }, { .brdinfo = &mlxreg_lc_main_pwr_devices[1], .nr = 0, }, { .brdinfo = &mlxreg_lc_main_pwr_devices[2], .nr = 1, }, { .brdinfo = &mlxreg_lc_main_pwr_devices[3], .nr = 2, }, }; /* LED default data. */ static struct mlxreg_core_data mlxreg_lc_led_data[] = { { .label = "status:green", .reg = MLXREG_LC_REG_LED1_OFFSET, .mask = GENMASK(7, 4), }, { .label = "status:orange", .reg = MLXREG_LC_REG_LED1_OFFSET, .mask = GENMASK(7, 4), }, }; static struct mlxreg_core_platform_data mlxreg_lc_led = { .identity = "pci", .data = mlxreg_lc_led_data, .counter = ARRAY_SIZE(mlxreg_lc_led_data), }; /* Default register access data. */ static struct mlxreg_core_data mlxreg_lc_io_data[] = { { .label = "cpld1_version", .reg = MLXREG_LC_REG_CPLD1_VER_OFFSET, .bit = GENMASK(7, 0), .mode = 0444, }, { .label = "fpga1_version", .reg = MLXREG_LC_REG_FPGA1_VER_OFFSET, .bit = GENMASK(7, 0), .mode = 0444, }, { .label = "cpld1_pn", .reg = MLXREG_LC_REG_CPLD1_PN_OFFSET, .bit = GENMASK(15, 0), .mode = 0444, .regnum = 2, }, { .label = "fpga1_pn", .reg = MLXREG_LC_REG_FPGA1_PN_OFFSET, .bit = GENMASK(15, 0), .mode = 0444, .regnum = 2, }, { .label = "cpld1_version_min", .reg = MLXREG_LC_REG_CPLD1_MVER_OFFSET, .bit = GENMASK(7, 0), .mode = 0444, }, { .label = "fpga1_version_min", .reg = MLXREG_LC_REG_FPGA1_MVER_OFFSET, .bit = GENMASK(7, 0), .mode = 0444, }, { .label = "reset_fpga_not_done", .reg = MLXREG_LC_REG_RESET_CAUSE_OFFSET, .mask = GENMASK(7, 0) & ~BIT(1), .mode = 0444, }, { .label = "reset_aux_pwr_or_ref", .reg = MLXREG_LC_REG_RESET_CAUSE_OFFSET, .mask = GENMASK(7, 0) & ~BIT(2), .mode = 0444, }, { .label = "reset_dc_dc_pwr_fail", .reg = MLXREG_LC_REG_RESET_CAUSE_OFFSET, .mask = GENMASK(7, 0) & ~BIT(3), .mode = 0444, }, { .label = "reset_from_chassis", .reg = MLXREG_LC_REG_RESET_CAUSE_OFFSET, .mask = GENMASK(7, 0) & ~BIT(4), .mode = 0444, }, { .label = "reset_pwr_off_from_chassis", .reg = MLXREG_LC_REG_RESET_CAUSE_OFFSET, .mask = GENMASK(7, 0) & ~BIT(5), .mode = 0444, }, { .label = "reset_line_card", .reg = MLXREG_LC_REG_RESET_CAUSE_OFFSET, .mask = GENMASK(7, 0) & ~BIT(6), .mode = 0444, }, { .label = "reset_line_card_pwr_en", .reg = MLXREG_LC_REG_RESET_CAUSE_OFFSET, .mask = GENMASK(7, 0) & ~BIT(7), .mode = 0444, }, { .label = "cpld_upgrade_en", .reg = MLXREG_LC_REG_FIELD_UPGRADE, .mask = GENMASK(7, 0) & ~BIT(0), .mode = 0644, .secured = 1, }, { .label = "fpga_upgrade_en", .reg = MLXREG_LC_REG_FIELD_UPGRADE, .mask = GENMASK(7, 0) & ~BIT(1), .mode = 0644, .secured = 1, }, { .label = "qsfp_pwr_en", .reg = MLXREG_LC_REG_GP0_OFFSET, .mask = GENMASK(7, 0) & ~BIT(0), .mode = 0644, }, { .label = "vpd_wp", .reg = MLXREG_LC_REG_GP0_OFFSET, .mask = GENMASK(7, 0) & ~BIT(3), .mode = 0644, .secured = 1, }, { .label = "agb_spi_burn_en", .reg = MLXREG_LC_REG_GP0_OFFSET, .mask = GENMASK(7, 0) & ~BIT(5), .mode = 0644, .secured = 1, }, { .label = "fpga_spi_burn_en", .reg = MLXREG_LC_REG_GP0_OFFSET, .mask = GENMASK(7, 0) & ~BIT(6), .mode = 0644, .secured = 1, }, { .label = "max_power", .reg = MLXREG_LC_REG_MAX_POWER_OFFSET, .bit = GENMASK(15, 0), .mode = 0444, .regnum = 2, }, { .label = "config", .reg = MLXREG_LC_REG_CONFIG_OFFSET, .bit = GENMASK(15, 0), .mode = 0444, .regnum = 2, }, }; static struct mlxreg_core_platform_data mlxreg_lc_regs_io = { .data = mlxreg_lc_io_data, .counter = ARRAY_SIZE(mlxreg_lc_io_data), }; static int mlxreg_lc_create_static_devices(struct mlxreg_lc *mlxreg_lc, struct mlxreg_hotplug_device *devs, int size) { struct mlxreg_hotplug_device *dev = devs; int i, ret; /* Create static I2C device feeding by auxiliary or main power. */ for (i = 0; i < size; i++, dev++) { dev->client = i2c_new_client_device(dev->adapter, dev->brdinfo); if (IS_ERR(dev->client)) { dev_err(mlxreg_lc->dev, "Failed to create client %s at bus %d at addr 0x%02x\n", dev->brdinfo->type, dev->nr, dev->brdinfo->addr); dev->adapter = NULL; ret = PTR_ERR(dev->client); goto fail_create_static_devices; } } return 0; fail_create_static_devices: while (--i >= 0) { dev = devs + i; i2c_unregister_device(dev->client); dev->client = NULL; } return ret; } static void mlxreg_lc_destroy_static_devices(struct mlxreg_lc *mlxreg_lc, struct mlxreg_hotplug_device *devs, int size) { struct mlxreg_hotplug_device *dev = devs; int i; /* Destroy static I2C device feeding by auxiliary or main power. */ for (i = 0; i < size; i++, dev++) { if (dev->client) { i2c_unregister_device(dev->client); dev->client = NULL; } } } static int mlxreg_lc_power_on_off(struct mlxreg_lc *mlxreg_lc, u8 action) { u32 regval; int err; err = regmap_read(mlxreg_lc->par_regmap, mlxreg_lc->data->reg_pwr, ®val); if (err) goto regmap_read_fail; if (action) regval |= BIT(mlxreg_lc->data->slot - 1); else regval &= ~BIT(mlxreg_lc->data->slot - 1); err = regmap_write(mlxreg_lc->par_regmap, mlxreg_lc->data->reg_pwr, regval); regmap_read_fail: return err; } static int mlxreg_lc_enable_disable(struct mlxreg_lc *mlxreg_lc, bool action) { u32 regval; int err; /* * Hardware holds the line card after powering on in the disabled state. Holding line card * in disabled state protects access to the line components, like FPGA and gearboxes. * Line card should be enabled in order to get it in operational state. Line card could be * disabled for moving it to non-operational state. Enabling line card does not affect the * line card which is already has been enabled. Disabling does not affect the disabled line * card. */ err = regmap_read(mlxreg_lc->par_regmap, mlxreg_lc->data->reg_ena, ®val); if (err) goto regmap_read_fail; if (action) regval |= BIT(mlxreg_lc->data->slot - 1); else regval &= ~BIT(mlxreg_lc->data->slot - 1); err = regmap_write(mlxreg_lc->par_regmap, mlxreg_lc->data->reg_ena, regval); regmap_read_fail: return err; } static int mlxreg_lc_sn4800_c16_config_init(struct mlxreg_lc *mlxreg_lc, void *regmap, struct mlxreg_core_data *data) { struct device *dev = &data->hpdev.client->dev; /* Set line card configuration according to the type. */ mlxreg_lc->mux_data = mlxreg_lc_mux_data; mlxreg_lc->io_data = &mlxreg_lc_regs_io; mlxreg_lc->led_data = &mlxreg_lc_led; mlxreg_lc->mux_brdinfo = &mlxreg_lc_mux_brdinfo; mlxreg_lc->aux_devs = devm_kmemdup(dev, mlxreg_lc_aux_pwr_brdinfo, sizeof(mlxreg_lc_aux_pwr_brdinfo), GFP_KERNEL); if (!mlxreg_lc->aux_devs) return -ENOMEM; mlxreg_lc->aux_devs_num = ARRAY_SIZE(mlxreg_lc_aux_pwr_brdinfo); mlxreg_lc->main_devs = devm_kmemdup(dev, mlxreg_lc_main_pwr_brdinfo, sizeof(mlxreg_lc_main_pwr_brdinfo), GFP_KERNEL); if (!mlxreg_lc->main_devs) return -ENOMEM; mlxreg_lc->main_devs_num = ARRAY_SIZE(mlxreg_lc_main_pwr_brdinfo); return 0; } static void mlxreg_lc_state_update(struct mlxreg_lc *mlxreg_lc, enum mlxreg_lc_state state, u8 action) { if (action) mlxreg_lc->state |= state; else mlxreg_lc->state &= ~state; } static void mlxreg_lc_state_update_locked(struct mlxreg_lc *mlxreg_lc, enum mlxreg_lc_state state, u8 action) { mutex_lock(&mlxreg_lc->lock); if (action) mlxreg_lc->state |= state; else mlxreg_lc->state &= ~state; mutex_unlock(&mlxreg_lc->lock); } /* * Callback is to be called from mlxreg-hotplug driver to notify about line card about received * event. */ static int mlxreg_lc_event_handler(void *handle, enum mlxreg_hotplug_kind kind, u8 action) { struct mlxreg_lc *mlxreg_lc = handle; int err = 0; dev_info(mlxreg_lc->dev, "linecard#%d state %d event kind %d action %d\n", mlxreg_lc->data->slot, mlxreg_lc->state, kind, action); mutex_lock(&mlxreg_lc->lock); if (!(mlxreg_lc->state & MLXREG_LC_INITIALIZED)) goto mlxreg_lc_non_initialzed_exit; switch (kind) { case MLXREG_HOTPLUG_LC_SYNCED: /* * Synchronization event - hardware and firmware are synchronized. Power on/off * line card - to allow/disallow main power source. */ mlxreg_lc_state_update(mlxreg_lc, MLXREG_LC_SYNCED, action); /* Power line card if it is not powered yet. */ if (!(mlxreg_lc->state & MLXREG_LC_POWERED) && action) { err = mlxreg_lc_power_on_off(mlxreg_lc, 1); if (err) goto mlxreg_lc_power_on_off_fail; } /* In case line card is configured - enable it. */ if (mlxreg_lc->state & MLXREG_LC_CONFIGURED && action) err = mlxreg_lc_enable_disable(mlxreg_lc, 1); break; case MLXREG_HOTPLUG_LC_POWERED: /* Power event - attach or de-attach line card device feeding by the main power. */ if (action) { /* Do not create devices, if line card is already powered. */ if (mlxreg_lc->state & MLXREG_LC_POWERED) { /* In case line card is configured - enable it. */ if (mlxreg_lc->state & MLXREG_LC_CONFIGURED) err = mlxreg_lc_enable_disable(mlxreg_lc, 1); goto mlxreg_lc_enable_disable_exit; } err = mlxreg_lc_create_static_devices(mlxreg_lc, mlxreg_lc->main_devs, mlxreg_lc->main_devs_num); if (err) goto mlxreg_lc_create_static_devices_fail; /* In case line card is already in ready state - enable it. */ if (mlxreg_lc->state & MLXREG_LC_CONFIGURED) err = mlxreg_lc_enable_disable(mlxreg_lc, 1); } else { mlxreg_lc_destroy_static_devices(mlxreg_lc, mlxreg_lc->main_devs, mlxreg_lc->main_devs_num); } mlxreg_lc_state_update(mlxreg_lc, MLXREG_LC_POWERED, action); break; case MLXREG_HOTPLUG_LC_READY: /* * Ready event – enable line card by releasing it from reset or disable it by put * to reset state. */ err = mlxreg_lc_enable_disable(mlxreg_lc, !!action); break; case MLXREG_HOTPLUG_LC_THERMAL: /* Thermal shutdown event – power off line card. */ if (action) err = mlxreg_lc_power_on_off(mlxreg_lc, 0); break; default: break; } mlxreg_lc_enable_disable_exit: mlxreg_lc_power_on_off_fail: mlxreg_lc_create_static_devices_fail: mlxreg_lc_non_initialzed_exit: mutex_unlock(&mlxreg_lc->lock); return err; } /* * Callback is to be called from i2c-mux-mlxcpld driver to indicate that all adapter devices has * been created. */ static int mlxreg_lc_completion_notify(void *handle, struct i2c_adapter *parent, struct i2c_adapter *adapters[]) { struct mlxreg_hotplug_device *main_dev, *aux_dev; struct mlxreg_lc *mlxreg_lc = handle; u32 regval; int i, err; /* Update I2C devices feeding by auxiliary power. */ aux_dev = mlxreg_lc->aux_devs; for (i = 0; i < mlxreg_lc->aux_devs_num; i++, aux_dev++) { aux_dev->adapter = adapters[aux_dev->nr]; aux_dev->nr = adapters[aux_dev->nr]->nr; } err = mlxreg_lc_create_static_devices(mlxreg_lc, mlxreg_lc->aux_devs, mlxreg_lc->aux_devs_num); if (err) return err; /* Update I2C devices feeding by main power. */ main_dev = mlxreg_lc->main_devs; for (i = 0; i < mlxreg_lc->main_devs_num; i++, main_dev++) { main_dev->adapter = adapters[main_dev->nr]; main_dev->nr = adapters[main_dev->nr]->nr; } /* Verify if line card is powered. */ err = regmap_read(mlxreg_lc->par_regmap, mlxreg_lc->data->reg_pwr, ®val); if (err) goto mlxreg_lc_regmap_read_power_fail; if (regval & mlxreg_lc->data->mask) { err = mlxreg_lc_create_static_devices(mlxreg_lc, mlxreg_lc->main_devs, mlxreg_lc->main_devs_num); if (err) goto mlxreg_lc_create_static_devices_failed; mlxreg_lc_state_update_locked(mlxreg_lc, MLXREG_LC_POWERED, 1); } /* Verify if line card is synchronized. */ err = regmap_read(mlxreg_lc->par_regmap, mlxreg_lc->data->reg_sync, ®val); if (err) goto mlxreg_lc_regmap_read_sync_fail; /* Power on line card if necessary. */ if (regval & mlxreg_lc->data->mask) { mlxreg_lc->state |= MLXREG_LC_SYNCED; mlxreg_lc_state_update_locked(mlxreg_lc, MLXREG_LC_SYNCED, 1); if (mlxreg_lc->state & ~MLXREG_LC_POWERED) { err = mlxreg_lc_power_on_off(mlxreg_lc, 1); if (err) goto mlxreg_lc_regmap_power_on_off_fail; } } mlxreg_lc_state_update_locked(mlxreg_lc, MLXREG_LC_INITIALIZED, 1); return 0; mlxreg_lc_regmap_power_on_off_fail: mlxreg_lc_regmap_read_sync_fail: if (mlxreg_lc->state & MLXREG_LC_POWERED) mlxreg_lc_destroy_static_devices(mlxreg_lc, mlxreg_lc->main_devs, mlxreg_lc->main_devs_num); mlxreg_lc_create_static_devices_failed: mlxreg_lc_destroy_static_devices(mlxreg_lc, mlxreg_lc->aux_devs, mlxreg_lc->aux_devs_num); mlxreg_lc_regmap_read_power_fail: return err; } static int mlxreg_lc_config_init(struct mlxreg_lc *mlxreg_lc, void *regmap, struct mlxreg_core_data *data) { struct device *dev = &data->hpdev.client->dev; int lsb, err; u32 regval; /* Validate line card type. */ err = regmap_read(regmap, MLXREG_LC_REG_CONFIG_OFFSET, &lsb); err = (!err) ? regmap_read(regmap, MLXREG_LC_REG_CONFIG_OFFSET, ®val) : err; if (err) return err; regval = (regval & GENMASK(7, 0)) << 8 | (lsb & GENMASK(7, 0)); switch (regval) { case MLXREG_LC_SN4800_C16: err = mlxreg_lc_sn4800_c16_config_init(mlxreg_lc, regmap, data); if (err) { dev_err(dev, "Failed to config client %s at bus %d at addr 0x%02x\n", data->hpdev.brdinfo->type, data->hpdev.nr, data->hpdev.brdinfo->addr); return err; } break; default: return -ENODEV; } /* Create mux infrastructure. */ mlxreg_lc->mux_data->handle = mlxreg_lc; mlxreg_lc->mux_data->completion_notify = mlxreg_lc_completion_notify; mlxreg_lc->mux_brdinfo->platform_data = mlxreg_lc->mux_data; mlxreg_lc->mux = platform_device_register_resndata(dev, "i2c-mux-mlxcpld", data->hpdev.nr, NULL, 0, mlxreg_lc->mux_data, sizeof(*mlxreg_lc->mux_data)); if (IS_ERR(mlxreg_lc->mux)) { dev_err(dev, "Failed to create mux infra for client %s at bus %d at addr 0x%02x\n", data->hpdev.brdinfo->type, data->hpdev.nr, data->hpdev.brdinfo->addr); return PTR_ERR(mlxreg_lc->mux); } /* Register IO access driver. */ if (mlxreg_lc->io_data) { mlxreg_lc->io_data->regmap = regmap; mlxreg_lc->io_regs = platform_device_register_resndata(dev, "mlxreg-io", data->hpdev.nr, NULL, 0, mlxreg_lc->io_data, sizeof(*mlxreg_lc->io_data)); if (IS_ERR(mlxreg_lc->io_regs)) { dev_err(dev, "Failed to create regio for client %s at bus %d at addr 0x%02x\n", data->hpdev.brdinfo->type, data->hpdev.nr, data->hpdev.brdinfo->addr); err = PTR_ERR(mlxreg_lc->io_regs); goto fail_register_io; } } /* Register LED driver. */ if (mlxreg_lc->led_data) { mlxreg_lc->led_data->regmap = regmap; mlxreg_lc->led = platform_device_register_resndata(dev, "leds-mlxreg", data->hpdev.nr, NULL, 0, mlxreg_lc->led_data, sizeof(*mlxreg_lc->led_data)); if (IS_ERR(mlxreg_lc->led)) { dev_err(dev, "Failed to create LED objects for client %s at bus %d at addr 0x%02x\n", data->hpdev.brdinfo->type, data->hpdev.nr, data->hpdev.brdinfo->addr); err = PTR_ERR(mlxreg_lc->led); goto fail_register_led; } } return 0; fail_register_led: if (mlxreg_lc->io_regs) platform_device_unregister(mlxreg_lc->io_regs); fail_register_io: if (mlxreg_lc->mux) platform_device_unregister(mlxreg_lc->mux); return err; } static void mlxreg_lc_config_exit(struct mlxreg_lc *mlxreg_lc) { /* Unregister LED driver. */ if (mlxreg_lc->led) platform_device_unregister(mlxreg_lc->led); /* Unregister IO access driver. */ if (mlxreg_lc->io_regs) platform_device_unregister(mlxreg_lc->io_regs); /* Remove mux infrastructure. */ if (mlxreg_lc->mux) platform_device_unregister(mlxreg_lc->mux); } static int mlxreg_lc_probe(struct platform_device *pdev) { struct mlxreg_core_hotplug_platform_data *par_pdata; struct mlxreg_core_data *data; struct mlxreg_lc *mlxreg_lc; void *regmap; int i, err; data = dev_get_platdata(&pdev->dev); if (!data) return -EINVAL; mlxreg_lc = devm_kzalloc(&pdev->dev, sizeof(*mlxreg_lc), GFP_KERNEL); if (!mlxreg_lc) return -ENOMEM; mutex_init(&mlxreg_lc->lock); /* Set event notification callback. */ data->notifier->user_handler = mlxreg_lc_event_handler; data->notifier->handle = mlxreg_lc; data->hpdev.adapter = i2c_get_adapter(data->hpdev.nr); if (!data->hpdev.adapter) { dev_err(&pdev->dev, "Failed to get adapter for bus %d\n", data->hpdev.nr); err = -EFAULT; goto i2c_get_adapter_fail; } /* Create device at the top of line card I2C tree.*/ data->hpdev.client = i2c_new_client_device(data->hpdev.adapter, data->hpdev.brdinfo); if (IS_ERR(data->hpdev.client)) { dev_err(&pdev->dev, "Failed to create client %s at bus %d at addr 0x%02x\n", data->hpdev.brdinfo->type, data->hpdev.nr, data->hpdev.brdinfo->addr); err = PTR_ERR(data->hpdev.client); goto i2c_new_device_fail; } regmap = devm_regmap_init_i2c(data->hpdev.client, &mlxreg_lc_regmap_conf); if (IS_ERR(regmap)) { dev_err(&pdev->dev, "Failed to create regmap for client %s at bus %d at addr 0x%02x\n", data->hpdev.brdinfo->type, data->hpdev.nr, data->hpdev.brdinfo->addr); err = PTR_ERR(regmap); goto devm_regmap_init_i2c_fail; } /* Set default registers. */ for (i = 0; i < mlxreg_lc_regmap_conf.num_reg_defaults; i++) { err = regmap_write(regmap, mlxreg_lc_regmap_default[i].reg, mlxreg_lc_regmap_default[i].def); if (err) { dev_err(&pdev->dev, "Failed to set default regmap %d for client %s at bus %d at addr 0x%02x\n", i, data->hpdev.brdinfo->type, data->hpdev.nr, data->hpdev.brdinfo->addr); goto regmap_write_fail; } } /* Sync registers with hardware. */ regcache_mark_dirty(regmap); err = regcache_sync(regmap); if (err) { dev_err(&pdev->dev, "Failed to sync regmap for client %s at bus %d at addr 0x%02x\n", data->hpdev.brdinfo->type, data->hpdev.nr, data->hpdev.brdinfo->addr); goto regcache_sync_fail; } par_pdata = data->hpdev.brdinfo->platform_data; mlxreg_lc->par_regmap = par_pdata->regmap; mlxreg_lc->data = data; mlxreg_lc->dev = &pdev->dev; platform_set_drvdata(pdev, mlxreg_lc); /* Configure line card. */ err = mlxreg_lc_config_init(mlxreg_lc, regmap, data); if (err) goto mlxreg_lc_config_init_fail; return 0; mlxreg_lc_config_init_fail: regcache_sync_fail: regmap_write_fail: devm_regmap_init_i2c_fail: i2c_unregister_device(data->hpdev.client); data->hpdev.client = NULL; i2c_new_device_fail: i2c_put_adapter(data->hpdev.adapter); data->hpdev.adapter = NULL; i2c_get_adapter_fail: /* Clear event notification callback and handle. */ if (data->notifier) { data->notifier->user_handler = NULL; data->notifier->handle = NULL; } return err; } static void mlxreg_lc_remove(struct platform_device *pdev) { struct mlxreg_core_data *data = dev_get_platdata(&pdev->dev); struct mlxreg_lc *mlxreg_lc = platform_get_drvdata(pdev); mlxreg_lc_state_update_locked(mlxreg_lc, MLXREG_LC_INITIALIZED, 0); /* * Probing and removing are invoked by hotplug events raised upon line card insertion and * removing. If probing procedure fails all data is cleared. However, hotplug event still * will be raised on line card removing and activate removing procedure. In this case there * is nothing to remove. */ if (!data->notifier || !data->notifier->handle) return; /* Clear event notification callback and handle. */ data->notifier->user_handler = NULL; data->notifier->handle = NULL; /* Destroy static I2C device feeding by main power. */ mlxreg_lc_destroy_static_devices(mlxreg_lc, mlxreg_lc->main_devs, mlxreg_lc->main_devs_num); /* Destroy static I2C device feeding by auxiliary power. */ mlxreg_lc_destroy_static_devices(mlxreg_lc, mlxreg_lc->aux_devs, mlxreg_lc->aux_devs_num); /* Unregister underlying drivers. */ mlxreg_lc_config_exit(mlxreg_lc); if (data->hpdev.client) { i2c_unregister_device(data->hpdev.client); data->hpdev.client = NULL; i2c_put_adapter(data->hpdev.adapter); data->hpdev.adapter = NULL; } } static struct platform_driver mlxreg_lc_driver = { .probe = mlxreg_lc_probe, .remove = mlxreg_lc_remove, .driver = { .name = "mlxreg-lc", }, }; module_platform_driver(mlxreg_lc_driver); MODULE_AUTHOR("Vadim Pasternak "); MODULE_DESCRIPTION("Nvidia line card platform driver"); MODULE_LICENSE("Dual BSD/GPL"); MODULE_ALIAS("platform:mlxreg-lc");