| /* |
| * drivers/mfd/si476x-i2c.c -- Core device driver for si476x MFD |
| * device |
| * |
| * Copyright (C) 2012 Innovative Converged Devices(ICD) |
| * Copyright (C) 2013 Andrey Smirnov |
| * |
| * Author: Andrey Smirnov <andrew.smirnov@gmail.com> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; version 2 of the License. |
| * |
| * This program is distributed in the hope that it will be useful, but |
| * WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * General Public License for more details. |
| * |
| */ |
| #include <linux/module.h> |
| |
| #include <linux/slab.h> |
| #include <linux/interrupt.h> |
| #include <linux/delay.h> |
| #include <linux/gpio.h> |
| #include <linux/regulator/consumer.h> |
| #include <linux/i2c.h> |
| #include <linux/err.h> |
| |
| #include <linux/mfd/si476x-core.h> |
| |
| #define SI476X_MAX_IO_ERRORS 10 |
| #define SI476X_DRIVER_RDS_FIFO_DEPTH 128 |
| |
| /** |
| * si476x_core_config_pinmux() - pin function configuration function |
| * |
| * @core: Core device structure |
| * |
| * Configure the functions of the pins of the radio chip. |
| * |
| * The function returns zero in case of succes or negative error code |
| * otherwise. |
| */ |
| static int si476x_core_config_pinmux(struct si476x_core *core) |
| { |
| int err; |
| dev_dbg(&core->client->dev, "Configuring pinmux\n"); |
| err = si476x_core_cmd_dig_audio_pin_cfg(core, |
| core->pinmux.dclk, |
| core->pinmux.dfs, |
| core->pinmux.dout, |
| core->pinmux.xout); |
| if (err < 0) { |
| dev_err(&core->client->dev, |
| "Failed to configure digital audio pins(err = %d)\n", |
| err); |
| return err; |
| } |
| |
| err = si476x_core_cmd_zif_pin_cfg(core, |
| core->pinmux.iqclk, |
| core->pinmux.iqfs, |
| core->pinmux.iout, |
| core->pinmux.qout); |
| if (err < 0) { |
| dev_err(&core->client->dev, |
| "Failed to configure ZIF pins(err = %d)\n", |
| err); |
| return err; |
| } |
| |
| err = si476x_core_cmd_ic_link_gpo_ctl_pin_cfg(core, |
| core->pinmux.icin, |
| core->pinmux.icip, |
| core->pinmux.icon, |
| core->pinmux.icop); |
| if (err < 0) { |
| dev_err(&core->client->dev, |
| "Failed to configure IC-Link/GPO pins(err = %d)\n", |
| err); |
| return err; |
| } |
| |
| err = si476x_core_cmd_ana_audio_pin_cfg(core, |
| core->pinmux.lrout); |
| if (err < 0) { |
| dev_err(&core->client->dev, |
| "Failed to configure analog audio pins(err = %d)\n", |
| err); |
| return err; |
| } |
| |
| err = si476x_core_cmd_intb_pin_cfg(core, |
| core->pinmux.intb, |
| core->pinmux.a1); |
| if (err < 0) { |
| dev_err(&core->client->dev, |
| "Failed to configure interrupt pins(err = %d)\n", |
| err); |
| return err; |
| } |
| |
| return 0; |
| } |
| |
| static inline void si476x_core_schedule_polling_work(struct si476x_core *core) |
| { |
| schedule_delayed_work(&core->status_monitor, |
| usecs_to_jiffies(SI476X_STATUS_POLL_US)); |
| } |
| |
| /** |
| * si476x_core_start() - early chip startup function |
| * @core: Core device structure |
| * @soft: When set, this flag forces "soft" startup, where "soft" |
| * power down is the one done by sending appropriate command instead |
| * of using reset pin of the tuner |
| * |
| * Perform required startup sequence to correctly power |
| * up the chip and perform initial configuration. It does the |
| * following sequence of actions: |
| * 1. Claims and enables the power supplies VD and VIO1 required |
| * for I2C interface of the chip operation. |
| * 2. Waits for 100us, pulls the reset line up, enables irq, |
| * waits for another 100us as it is specified by the |
| * datasheet. |
| * 3. Sends 'POWER_UP' command to the device with all provided |
| * information about power-up parameters. |
| * 4. Configures, pin multiplexor, disables digital audio and |
| * configures interrupt sources. |
| * |
| * The function returns zero in case of succes or negative error code |
| * otherwise. |
| */ |
| int si476x_core_start(struct si476x_core *core, bool soft) |
| { |
| struct i2c_client *client = core->client; |
| int err; |
| |
| if (!soft) { |
| if (gpio_is_valid(core->gpio_reset)) |
| gpio_set_value_cansleep(core->gpio_reset, 1); |
| |
| if (client->irq) |
| enable_irq(client->irq); |
| |
| udelay(100); |
| |
| if (!client->irq) { |
| atomic_set(&core->is_alive, 1); |
| si476x_core_schedule_polling_work(core); |
| } |
| } else { |
| if (client->irq) |
| enable_irq(client->irq); |
| else { |
| atomic_set(&core->is_alive, 1); |
| si476x_core_schedule_polling_work(core); |
| } |
| } |
| |
| err = si476x_core_cmd_power_up(core, |
| &core->power_up_parameters); |
| |
| if (err < 0) { |
| dev_err(&core->client->dev, |
| "Power up failure(err = %d)\n", |
| err); |
| goto disable_irq; |
| } |
| |
| if (client->irq) |
| atomic_set(&core->is_alive, 1); |
| |
| err = si476x_core_config_pinmux(core); |
| if (err < 0) { |
| dev_err(&core->client->dev, |
| "Failed to configure pinmux(err = %d)\n", |
| err); |
| goto disable_irq; |
| } |
| |
| if (client->irq) { |
| err = regmap_write(core->regmap, |
| SI476X_PROP_INT_CTL_ENABLE, |
| SI476X_RDSIEN | |
| SI476X_STCIEN | |
| SI476X_CTSIEN); |
| if (err < 0) { |
| dev_err(&core->client->dev, |
| "Failed to configure interrupt sources" |
| "(err = %d)\n", err); |
| goto disable_irq; |
| } |
| } |
| |
| return 0; |
| |
| disable_irq: |
| if (err == -ENODEV) |
| atomic_set(&core->is_alive, 0); |
| |
| if (client->irq) |
| disable_irq(client->irq); |
| else |
| cancel_delayed_work_sync(&core->status_monitor); |
| |
| if (gpio_is_valid(core->gpio_reset)) |
| gpio_set_value_cansleep(core->gpio_reset, 0); |
| |
| return err; |
| } |
| EXPORT_SYMBOL_GPL(si476x_core_start); |
| |
| /** |
| * si476x_core_stop() - chip power-down function |
| * @core: Core device structure |
| * @soft: When set, function sends a POWER_DOWN command instead of |
| * bringing reset line low |
| * |
| * Power down the chip by performing following actions: |
| * 1. Disable IRQ or stop the polling worker |
| * 2. Send the POWER_DOWN command if the power down is soft or bring |
| * reset line low if not. |
| * |
| * The function returns zero in case of succes or negative error code |
| * otherwise. |
| */ |
| int si476x_core_stop(struct si476x_core *core, bool soft) |
| { |
| int err = 0; |
| atomic_set(&core->is_alive, 0); |
| |
| if (soft) { |
| /* TODO: This probably shoud be a configurable option, |
| * so it is possible to have the chips keep their |
| * oscillators running |
| */ |
| struct si476x_power_down_args args = { |
| .xosc = false, |
| }; |
| err = si476x_core_cmd_power_down(core, &args); |
| } |
| |
| /* We couldn't disable those before |
| * 'si476x_core_cmd_power_down' since we expect to get CTS |
| * interrupt */ |
| if (core->client->irq) |
| disable_irq(core->client->irq); |
| else |
| cancel_delayed_work_sync(&core->status_monitor); |
| |
| if (!soft) { |
| if (gpio_is_valid(core->gpio_reset)) |
| gpio_set_value_cansleep(core->gpio_reset, 0); |
| } |
| return err; |
| } |
| EXPORT_SYMBOL_GPL(si476x_core_stop); |
| |
| /** |
| * si476x_core_set_power_state() - set the level at which the power is |
| * supplied for the chip. |
| * @core: Core device structure |
| * @next_state: enum si476x_power_state describing power state to |
| * switch to. |
| * |
| * Switch on all the required power supplies |
| * |
| * This function returns 0 in case of suvccess and negative error code |
| * otherwise. |
| */ |
| int si476x_core_set_power_state(struct si476x_core *core, |
| enum si476x_power_state next_state) |
| { |
| /* |
| It is not clear form the datasheet if it is possible to |
| work with device if not all power domains are operational. |
| So for now the power-up policy is "power-up all the things!" |
| */ |
| int err = 0; |
| |
| if (core->power_state == SI476X_POWER_INCONSISTENT) { |
| dev_err(&core->client->dev, |
| "The device in inconsistent power state\n"); |
| return -EINVAL; |
| } |
| |
| if (next_state != core->power_state) { |
| switch (next_state) { |
| case SI476X_POWER_UP_FULL: |
| err = regulator_bulk_enable(ARRAY_SIZE(core->supplies), |
| core->supplies); |
| if (err < 0) { |
| core->power_state = SI476X_POWER_INCONSISTENT; |
| break; |
| } |
| /* |
| * Startup timing diagram recommends to have a |
| * 100 us delay between enabling of the power |
| * supplies and turning the tuner on. |
| */ |
| udelay(100); |
| |
| err = si476x_core_start(core, true); |
| if (err < 0) |
| goto disable_regulators; |
| |
| core->power_state = next_state; |
| break; |
| |
| case SI476X_POWER_DOWN: |
| core->power_state = next_state; |
| err = si476x_core_stop(core, true); |
| if (err < 0) |
| core->power_state = SI476X_POWER_INCONSISTENT; |
| disable_regulators: |
| err = regulator_bulk_disable(ARRAY_SIZE(core->supplies), |
| core->supplies); |
| if (err < 0) |
| core->power_state = SI476X_POWER_INCONSISTENT; |
| break; |
| default: |
| BUG(); |
| } |
| } |
| |
| return err; |
| } |
| EXPORT_SYMBOL_GPL(si476x_core_set_power_state); |
| |
| /** |
| * si476x_core_report_drainer_stop() - mark the completion of the RDS |
| * buffer drain porcess by the worker. |
| * |
| * @core: Core device structure |
| */ |
| static inline void si476x_core_report_drainer_stop(struct si476x_core *core) |
| { |
| mutex_lock(&core->rds_drainer_status_lock); |
| core->rds_drainer_is_working = false; |
| mutex_unlock(&core->rds_drainer_status_lock); |
| } |
| |
| /** |
| * si476x_core_start_rds_drainer_once() - start RDS drainer worker if |
| * ther is none working, do nothing otherwise |
| * |
| * @core: Datastructure corresponding to the chip. |
| */ |
| static inline void si476x_core_start_rds_drainer_once(struct si476x_core *core) |
| { |
| mutex_lock(&core->rds_drainer_status_lock); |
| if (!core->rds_drainer_is_working) { |
| core->rds_drainer_is_working = true; |
| schedule_work(&core->rds_fifo_drainer); |
| } |
| mutex_unlock(&core->rds_drainer_status_lock); |
| } |
| /** |
| * si476x_drain_rds_fifo() - RDS buffer drainer. |
| * @work: struct work_struct being ppassed to the function by the |
| * kernel. |
| * |
| * Drain the contents of the RDS FIFO of |
| */ |
| static void si476x_core_drain_rds_fifo(struct work_struct *work) |
| { |
| int err; |
| |
| struct si476x_core *core = container_of(work, struct si476x_core, |
| rds_fifo_drainer); |
| |
| struct si476x_rds_status_report report; |
| |
| si476x_core_lock(core); |
| err = si476x_core_cmd_fm_rds_status(core, true, false, false, &report); |
| if (!err) { |
| int i = report.rdsfifoused; |
| dev_dbg(&core->client->dev, |
| "%d elements in RDS FIFO. Draining.\n", i); |
| for (; i > 0; --i) { |
| err = si476x_core_cmd_fm_rds_status(core, false, false, |
| (i == 1), &report); |
| if (err < 0) |
| goto unlock; |
| |
| kfifo_in(&core->rds_fifo, report.rds, |
| sizeof(report.rds)); |
| dev_dbg(&core->client->dev, "RDS data:\n %*ph\n", |
| (int)sizeof(report.rds), report.rds); |
| } |
| dev_dbg(&core->client->dev, "Drrrrained!\n"); |
| wake_up_interruptible(&core->rds_read_queue); |
| } |
| |
| unlock: |
| si476x_core_unlock(core); |
| si476x_core_report_drainer_stop(core); |
| } |
| |
| /** |
| * si476x_core_pronounce_dead() |
| * |
| * @core: Core device structure |
| * |
| * Mark the device as being dead and wake up all potentially waiting |
| * threads of execution. |
| * |
| */ |
| static void si476x_core_pronounce_dead(struct si476x_core *core) |
| { |
| dev_info(&core->client->dev, "Core device is dead.\n"); |
| |
| atomic_set(&core->is_alive, 0); |
| |
| /* Wake up al possible waiting processes */ |
| wake_up_interruptible(&core->rds_read_queue); |
| |
| atomic_set(&core->cts, 1); |
| wake_up(&core->command); |
| |
| atomic_set(&core->stc, 1); |
| wake_up(&core->tuning); |
| } |
| |
| /** |
| * si476x_core_i2c_xfer() |
| * |
| * @core: Core device structure |
| * @type: Transfer type |
| * @buf: Transfer buffer for/with data |
| * @count: Transfer buffer size |
| * |
| * Perfrom and I2C transfer(either read or write) and keep a counter |
| * of I/O errors. If the error counter rises above the threshold |
| * pronounce device dead. |
| * |
| * The function returns zero on succes or negative error code on |
| * failure. |
| */ |
| int si476x_core_i2c_xfer(struct si476x_core *core, |
| enum si476x_i2c_type type, |
| char *buf, int count) |
| { |
| static int io_errors_count; |
| int err; |
| if (type == SI476X_I2C_SEND) |
| err = i2c_master_send(core->client, buf, count); |
| else |
| err = i2c_master_recv(core->client, buf, count); |
| |
| if (err < 0) { |
| if (io_errors_count++ > SI476X_MAX_IO_ERRORS) |
| si476x_core_pronounce_dead(core); |
| } else { |
| io_errors_count = 0; |
| } |
| |
| return err; |
| } |
| EXPORT_SYMBOL_GPL(si476x_core_i2c_xfer); |
| |
| /** |
| * si476x_get_status() |
| * @core: Core device structure |
| * |
| * Get the status byte of the core device by berforming one byte I2C |
| * read. |
| * |
| * The function returns a status value or a negative error code on |
| * error. |
| */ |
| static int si476x_core_get_status(struct si476x_core *core) |
| { |
| u8 response; |
| int err = si476x_core_i2c_xfer(core, SI476X_I2C_RECV, |
| &response, sizeof(response)); |
| |
| return (err < 0) ? err : response; |
| } |
| |
| /** |
| * si476x_get_and_signal_status() - IRQ dispatcher |
| * @core: Core device structure |
| * |
| * Dispatch the arrived interrupt request based on the value of the |
| * status byte reported by the tuner. |
| * |
| */ |
| static void si476x_core_get_and_signal_status(struct si476x_core *core) |
| { |
| int status = si476x_core_get_status(core); |
| if (status < 0) { |
| dev_err(&core->client->dev, "Failed to get status\n"); |
| return; |
| } |
| |
| if (status & SI476X_CTS) { |
| /* Unfortunately completions could not be used for |
| * signalling CTS since this flag cannot be cleared |
| * in status byte, and therefore once it becomes true |
| * multiple calls to 'complete' would cause the |
| * commands following the current one to be completed |
| * before they actually are */ |
| dev_dbg(&core->client->dev, "[interrupt] CTSINT\n"); |
| atomic_set(&core->cts, 1); |
| wake_up(&core->command); |
| } |
| |
| if (status & SI476X_FM_RDS_INT) { |
| dev_dbg(&core->client->dev, "[interrupt] RDSINT\n"); |
| si476x_core_start_rds_drainer_once(core); |
| } |
| |
| if (status & SI476X_STC_INT) { |
| dev_dbg(&core->client->dev, "[interrupt] STCINT\n"); |
| atomic_set(&core->stc, 1); |
| wake_up(&core->tuning); |
| } |
| } |
| |
| static void si476x_core_poll_loop(struct work_struct *work) |
| { |
| struct si476x_core *core = SI476X_WORK_TO_CORE(work); |
| |
| si476x_core_get_and_signal_status(core); |
| |
| if (atomic_read(&core->is_alive)) |
| si476x_core_schedule_polling_work(core); |
| } |
| |
| static irqreturn_t si476x_core_interrupt(int irq, void *dev) |
| { |
| struct si476x_core *core = dev; |
| |
| si476x_core_get_and_signal_status(core); |
| |
| return IRQ_HANDLED; |
| } |
| |
| /** |
| * si476x_firmware_version_to_revision() |
| * @core: Core device structure |
| * @major: Firmware major number |
| * @minor1: Firmware first minor number |
| * @minor2: Firmware second minor number |
| * |
| * Convert a chip's firmware version number into an offset that later |
| * will be used to as offset in "vtable" of tuner functions |
| * |
| * This function returns a positive offset in case of success and a -1 |
| * in case of failure. |
| */ |
| static int si476x_core_fwver_to_revision(struct si476x_core *core, |
| int func, int major, |
| int minor1, int minor2) |
| { |
| switch (func) { |
| case SI476X_FUNC_FM_RECEIVER: |
| switch (major) { |
| case 5: |
| return SI476X_REVISION_A10; |
| case 8: |
| return SI476X_REVISION_A20; |
| case 10: |
| return SI476X_REVISION_A30; |
| default: |
| goto unknown_revision; |
| } |
| case SI476X_FUNC_AM_RECEIVER: |
| switch (major) { |
| case 5: |
| return SI476X_REVISION_A10; |
| case 7: |
| return SI476X_REVISION_A20; |
| case 9: |
| return SI476X_REVISION_A30; |
| default: |
| goto unknown_revision; |
| } |
| case SI476X_FUNC_WB_RECEIVER: |
| switch (major) { |
| case 3: |
| return SI476X_REVISION_A10; |
| case 5: |
| return SI476X_REVISION_A20; |
| case 7: |
| return SI476X_REVISION_A30; |
| default: |
| goto unknown_revision; |
| } |
| case SI476X_FUNC_BOOTLOADER: |
| default: /* FALLTHROUG */ |
| BUG(); |
| return -1; |
| } |
| |
| unknown_revision: |
| dev_err(&core->client->dev, |
| "Unsupported version of the firmware: %d.%d.%d, " |
| "reverting to A10 comptible functions\n", |
| major, minor1, minor2); |
| |
| return SI476X_REVISION_A10; |
| } |
| |
| /** |
| * si476x_get_revision_info() |
| * @core: Core device structure |
| * |
| * Get the firmware version number of the device. It is done in |
| * following three steps: |
| * 1. Power-up the device |
| * 2. Send the 'FUNC_INFO' command |
| * 3. Powering the device down. |
| * |
| * The function return zero on success and a negative error code on |
| * failure. |
| */ |
| static int si476x_core_get_revision_info(struct si476x_core *core) |
| { |
| int rval; |
| struct si476x_func_info info; |
| |
| si476x_core_lock(core); |
| rval = si476x_core_set_power_state(core, SI476X_POWER_UP_FULL); |
| if (rval < 0) |
| goto exit; |
| |
| rval = si476x_core_cmd_func_info(core, &info); |
| if (rval < 0) |
| goto power_down; |
| |
| core->revision = si476x_core_fwver_to_revision(core, info.func, |
| info.firmware.major, |
| info.firmware.minor[0], |
| info.firmware.minor[1]); |
| power_down: |
| si476x_core_set_power_state(core, SI476X_POWER_DOWN); |
| exit: |
| si476x_core_unlock(core); |
| |
| return rval; |
| } |
| |
| bool si476x_core_has_am(struct si476x_core *core) |
| { |
| return core->chip_id == SI476X_CHIP_SI4761 || |
| core->chip_id == SI476X_CHIP_SI4764; |
| } |
| EXPORT_SYMBOL_GPL(si476x_core_has_am); |
| |
| bool si476x_core_has_diversity(struct si476x_core *core) |
| { |
| return core->chip_id == SI476X_CHIP_SI4764; |
| } |
| EXPORT_SYMBOL_GPL(si476x_core_has_diversity); |
| |
| bool si476x_core_is_a_secondary_tuner(struct si476x_core *core) |
| { |
| return si476x_core_has_diversity(core) && |
| (core->diversity_mode == SI476X_PHDIV_SECONDARY_ANTENNA || |
| core->diversity_mode == SI476X_PHDIV_SECONDARY_COMBINING); |
| } |
| EXPORT_SYMBOL_GPL(si476x_core_is_a_secondary_tuner); |
| |
| bool si476x_core_is_a_primary_tuner(struct si476x_core *core) |
| { |
| return si476x_core_has_diversity(core) && |
| (core->diversity_mode == SI476X_PHDIV_PRIMARY_ANTENNA || |
| core->diversity_mode == SI476X_PHDIV_PRIMARY_COMBINING); |
| } |
| EXPORT_SYMBOL_GPL(si476x_core_is_a_primary_tuner); |
| |
| bool si476x_core_is_in_am_receiver_mode(struct si476x_core *core) |
| { |
| return si476x_core_has_am(core) && |
| (core->power_up_parameters.func == SI476X_FUNC_AM_RECEIVER); |
| } |
| EXPORT_SYMBOL_GPL(si476x_core_is_in_am_receiver_mode); |
| |
| bool si476x_core_is_powered_up(struct si476x_core *core) |
| { |
| return core->power_state == SI476X_POWER_UP_FULL; |
| } |
| EXPORT_SYMBOL_GPL(si476x_core_is_powered_up); |
| |
| static int si476x_core_probe(struct i2c_client *client, |
| const struct i2c_device_id *id) |
| { |
| int rval; |
| struct si476x_core *core; |
| struct si476x_platform_data *pdata; |
| struct mfd_cell *cell; |
| int cell_num; |
| |
| core = devm_kzalloc(&client->dev, sizeof(*core), GFP_KERNEL); |
| if (!core) { |
| dev_err(&client->dev, |
| "failed to allocate 'struct si476x_core'\n"); |
| return -ENOMEM; |
| } |
| core->client = client; |
| |
| core->regmap = devm_regmap_init_si476x(core); |
| if (IS_ERR(core->regmap)) { |
| rval = PTR_ERR(core->regmap); |
| dev_err(&client->dev, |
| "Failed to allocate register map: %d\n", |
| rval); |
| return rval; |
| } |
| |
| i2c_set_clientdata(client, core); |
| |
| atomic_set(&core->is_alive, 0); |
| core->power_state = SI476X_POWER_DOWN; |
| |
| pdata = dev_get_platdata(&client->dev); |
| if (pdata) { |
| memcpy(&core->power_up_parameters, |
| &pdata->power_up_parameters, |
| sizeof(core->power_up_parameters)); |
| |
| core->gpio_reset = -1; |
| if (gpio_is_valid(pdata->gpio_reset)) { |
| rval = gpio_request(pdata->gpio_reset, "si476x reset"); |
| if (rval) { |
| dev_err(&client->dev, |
| "Failed to request gpio: %d\n", rval); |
| return rval; |
| } |
| core->gpio_reset = pdata->gpio_reset; |
| gpio_direction_output(core->gpio_reset, 0); |
| } |
| |
| core->diversity_mode = pdata->diversity_mode; |
| memcpy(&core->pinmux, &pdata->pinmux, |
| sizeof(struct si476x_pinmux)); |
| } else { |
| dev_warn(&client->dev, "Using default platform data.\n"); |
| core->power_up_parameters.xcload = 0x28; |
| core->power_up_parameters.func = SI476X_FUNC_FM_RECEIVER; |
| core->power_up_parameters.freq = SI476X_FREQ_37P209375_MHZ; |
| core->diversity_mode = SI476X_PHDIV_DISABLED; |
| core->pinmux.dclk = SI476X_DCLK_DAUDIO; |
| core->pinmux.dfs = SI476X_DFS_DAUDIO; |
| core->pinmux.dout = SI476X_DOUT_I2S_OUTPUT; |
| core->pinmux.xout = SI476X_XOUT_TRISTATE; |
| } |
| |
| core->supplies[0].supply = "vd"; |
| core->supplies[1].supply = "va"; |
| core->supplies[2].supply = "vio1"; |
| core->supplies[3].supply = "vio2"; |
| |
| rval = devm_regulator_bulk_get(&client->dev, |
| ARRAY_SIZE(core->supplies), |
| core->supplies); |
| if (rval) { |
| dev_err(&client->dev, "Failet to gett all of the regulators\n"); |
| goto free_gpio; |
| } |
| |
| mutex_init(&core->cmd_lock); |
| init_waitqueue_head(&core->command); |
| init_waitqueue_head(&core->tuning); |
| |
| rval = kfifo_alloc(&core->rds_fifo, |
| SI476X_DRIVER_RDS_FIFO_DEPTH * |
| sizeof(struct v4l2_rds_data), |
| GFP_KERNEL); |
| if (rval) { |
| dev_err(&client->dev, "Could not allocate the FIFO\n"); |
| goto free_gpio; |
| } |
| mutex_init(&core->rds_drainer_status_lock); |
| init_waitqueue_head(&core->rds_read_queue); |
| INIT_WORK(&core->rds_fifo_drainer, si476x_core_drain_rds_fifo); |
| |
| if (client->irq) { |
| rval = devm_request_threaded_irq(&client->dev, |
| client->irq, NULL, |
| si476x_core_interrupt, |
| IRQF_TRIGGER_FALLING, |
| client->name, core); |
| if (rval < 0) { |
| dev_err(&client->dev, "Could not request IRQ %d\n", |
| client->irq); |
| goto free_kfifo; |
| } |
| disable_irq(client->irq); |
| dev_dbg(&client->dev, "IRQ requested.\n"); |
| |
| core->rds_fifo_depth = 20; |
| } else { |
| INIT_DELAYED_WORK(&core->status_monitor, |
| si476x_core_poll_loop); |
| dev_info(&client->dev, |
| "No IRQ number specified, will use polling\n"); |
| |
| core->rds_fifo_depth = 5; |
| } |
| |
| core->chip_id = id->driver_data; |
| |
| /* Power down si476x first */ |
| core->power_state = SI476X_POWER_UP_FULL; |
| si476x_core_set_power_state(core, SI476X_POWER_DOWN); |
| |
| rval = si476x_core_get_revision_info(core); |
| if (rval < 0) { |
| rval = -ENODEV; |
| goto free_kfifo; |
| } |
| |
| if (of_property_read_bool(client->dev.of_node, "revision-a10")) |
| core->revision = SI476X_REVISION_A10; |
| |
| cell_num = 0; |
| |
| cell = &core->cells[SI476X_RADIO_CELL]; |
| cell->name = "si476x-radio"; |
| cell_num++; |
| |
| #ifdef CONFIG_SND_SOC_SI476X |
| if ((core->chip_id == SI476X_CHIP_SI4761 || |
| core->chip_id == SI476X_CHIP_SI4764) && |
| core->pinmux.dclk == SI476X_DCLK_DAUDIO && |
| core->pinmux.dfs == SI476X_DFS_DAUDIO && |
| core->pinmux.dout == SI476X_DOUT_I2S_OUTPUT && |
| core->pinmux.xout == SI476X_XOUT_TRISTATE) { |
| cell = &core->cells[SI476X_CODEC_CELL]; |
| cell->name = "si476x-codec"; |
| cell->of_compatible = "si476x-codec"; |
| cell_num++; |
| } |
| #endif |
| rval = mfd_add_devices(&client->dev, |
| (client->adapter->nr << 8) + client->addr, |
| core->cells, cell_num, |
| NULL, 0, NULL); |
| if (!rval) |
| return 0; |
| |
| free_kfifo: |
| kfifo_free(&core->rds_fifo); |
| |
| free_gpio: |
| if (gpio_is_valid(core->gpio_reset)) |
| gpio_free(core->gpio_reset); |
| |
| return rval; |
| } |
| |
| static int si476x_core_remove(struct i2c_client *client) |
| { |
| struct si476x_core *core = i2c_get_clientdata(client); |
| |
| si476x_core_pronounce_dead(core); |
| mfd_remove_devices(&client->dev); |
| |
| if (client->irq) |
| disable_irq(client->irq); |
| else |
| cancel_delayed_work_sync(&core->status_monitor); |
| |
| kfifo_free(&core->rds_fifo); |
| |
| if (gpio_is_valid(core->gpio_reset)) |
| gpio_free(core->gpio_reset); |
| |
| return 0; |
| } |
| |
| |
| static const struct i2c_device_id si476x_id[] = { |
| { "si4761", SI476X_CHIP_SI4761 }, |
| { "si4764", SI476X_CHIP_SI4764 }, |
| { "si4768", SI476X_CHIP_SI4768 }, |
| { }, |
| }; |
| MODULE_DEVICE_TABLE(i2c, si476x_id); |
| |
| static struct i2c_driver si476x_core_driver = { |
| .driver = { |
| .name = "si476x-core", |
| .owner = THIS_MODULE, |
| }, |
| .probe = si476x_core_probe, |
| .remove = si476x_core_remove, |
| .id_table = si476x_id, |
| }; |
| module_i2c_driver(si476x_core_driver); |
| |
| |
| MODULE_AUTHOR("Andrey Smirnov <andrew.smirnov@gmail.com>"); |
| MODULE_DESCRIPTION("Si4761/64/68 AM/FM MFD core device driver"); |
| MODULE_LICENSE("GPL"); |