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880 lines
22 KiB
880 lines
22 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* drivers/mfd/si476x-i2c.c -- Core device driver for si476x MFD |
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* device |
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* |
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* Copyright (C) 2012 Innovative Converged Devices(ICD) |
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* Copyright (C) 2013 Andrey Smirnov |
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* |
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* Author: Andrey Smirnov <[email protected]> |
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*/ |
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#include <linux/module.h> |
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|
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#include <linux/slab.h> |
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#include <linux/interrupt.h> |
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#include <linux/delay.h> |
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#include <linux/gpio.h> |
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#include <linux/regulator/consumer.h> |
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#include <linux/i2c.h> |
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#include <linux/err.h> |
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#include <linux/mfd/si476x-core.h> |
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#define SI476X_MAX_IO_ERRORS 10 |
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#define SI476X_DRIVER_RDS_FIFO_DEPTH 128 |
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/** |
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* si476x_core_config_pinmux() - pin function configuration function |
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* |
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* @core: Core device structure |
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* |
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* Configure the functions of the pins of the radio chip. |
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* |
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* The function returns zero in case of succes or negative error code |
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* otherwise. |
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*/ |
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static int si476x_core_config_pinmux(struct si476x_core *core) |
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{ |
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int err; |
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dev_dbg(&core->client->dev, "Configuring pinmux\n"); |
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err = si476x_core_cmd_dig_audio_pin_cfg(core, |
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core->pinmux.dclk, |
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core->pinmux.dfs, |
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core->pinmux.dout, |
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core->pinmux.xout); |
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if (err < 0) { |
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dev_err(&core->client->dev, |
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"Failed to configure digital audio pins(err = %d)\n", |
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err); |
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return err; |
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} |
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err = si476x_core_cmd_zif_pin_cfg(core, |
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core->pinmux.iqclk, |
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core->pinmux.iqfs, |
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core->pinmux.iout, |
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core->pinmux.qout); |
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if (err < 0) { |
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dev_err(&core->client->dev, |
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"Failed to configure ZIF pins(err = %d)\n", |
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err); |
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return err; |
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} |
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err = si476x_core_cmd_ic_link_gpo_ctl_pin_cfg(core, |
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core->pinmux.icin, |
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core->pinmux.icip, |
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core->pinmux.icon, |
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core->pinmux.icop); |
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if (err < 0) { |
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dev_err(&core->client->dev, |
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"Failed to configure IC-Link/GPO pins(err = %d)\n", |
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err); |
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return err; |
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} |
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err = si476x_core_cmd_ana_audio_pin_cfg(core, |
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core->pinmux.lrout); |
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if (err < 0) { |
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dev_err(&core->client->dev, |
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"Failed to configure analog audio pins(err = %d)\n", |
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err); |
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return err; |
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} |
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err = si476x_core_cmd_intb_pin_cfg(core, |
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core->pinmux.intb, |
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core->pinmux.a1); |
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if (err < 0) { |
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dev_err(&core->client->dev, |
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"Failed to configure interrupt pins(err = %d)\n", |
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err); |
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return err; |
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} |
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return 0; |
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} |
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static inline void si476x_core_schedule_polling_work(struct si476x_core *core) |
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{ |
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schedule_delayed_work(&core->status_monitor, |
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usecs_to_jiffies(SI476X_STATUS_POLL_US)); |
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} |
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/** |
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* si476x_core_start() - early chip startup function |
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* @core: Core device structure |
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* @soft: When set, this flag forces "soft" startup, where "soft" |
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* power down is the one done by sending appropriate command instead |
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* of using reset pin of the tuner |
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* |
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* Perform required startup sequence to correctly power |
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* up the chip and perform initial configuration. It does the |
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* following sequence of actions: |
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* 1. Claims and enables the power supplies VD and VIO1 required |
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* for I2C interface of the chip operation. |
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* 2. Waits for 100us, pulls the reset line up, enables irq, |
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* waits for another 100us as it is specified by the |
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* datasheet. |
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* 3. Sends 'POWER_UP' command to the device with all provided |
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* information about power-up parameters. |
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* 4. Configures, pin multiplexor, disables digital audio and |
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* configures interrupt sources. |
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* |
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* The function returns zero in case of succes or negative error code |
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* otherwise. |
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*/ |
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int si476x_core_start(struct si476x_core *core, bool soft) |
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{ |
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struct i2c_client *client = core->client; |
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int err; |
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if (!soft) { |
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if (gpio_is_valid(core->gpio_reset)) |
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gpio_set_value_cansleep(core->gpio_reset, 1); |
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if (client->irq) |
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enable_irq(client->irq); |
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udelay(100); |
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if (!client->irq) { |
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atomic_set(&core->is_alive, 1); |
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si476x_core_schedule_polling_work(core); |
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} |
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} else { |
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if (client->irq) |
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enable_irq(client->irq); |
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else { |
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atomic_set(&core->is_alive, 1); |
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si476x_core_schedule_polling_work(core); |
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} |
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} |
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err = si476x_core_cmd_power_up(core, |
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&core->power_up_parameters); |
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if (err < 0) { |
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dev_err(&core->client->dev, |
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"Power up failure(err = %d)\n", |
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err); |
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goto disable_irq; |
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} |
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if (client->irq) |
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atomic_set(&core->is_alive, 1); |
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err = si476x_core_config_pinmux(core); |
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if (err < 0) { |
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dev_err(&core->client->dev, |
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"Failed to configure pinmux(err = %d)\n", |
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err); |
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goto disable_irq; |
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} |
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if (client->irq) { |
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err = regmap_write(core->regmap, |
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SI476X_PROP_INT_CTL_ENABLE, |
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SI476X_RDSIEN | |
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SI476X_STCIEN | |
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SI476X_CTSIEN); |
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if (err < 0) { |
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dev_err(&core->client->dev, |
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"Failed to configure interrupt sources" |
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"(err = %d)\n", err); |
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goto disable_irq; |
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} |
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} |
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return 0; |
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disable_irq: |
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if (err == -ENODEV) |
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atomic_set(&core->is_alive, 0); |
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if (client->irq) |
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disable_irq(client->irq); |
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else |
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cancel_delayed_work_sync(&core->status_monitor); |
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if (gpio_is_valid(core->gpio_reset)) |
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gpio_set_value_cansleep(core->gpio_reset, 0); |
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return err; |
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} |
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EXPORT_SYMBOL_GPL(si476x_core_start); |
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/** |
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* si476x_core_stop() - chip power-down function |
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* @core: Core device structure |
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* @soft: When set, function sends a POWER_DOWN command instead of |
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* bringing reset line low |
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* |
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* Power down the chip by performing following actions: |
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* 1. Disable IRQ or stop the polling worker |
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* 2. Send the POWER_DOWN command if the power down is soft or bring |
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* reset line low if not. |
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* |
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* The function returns zero in case of succes or negative error code |
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* otherwise. |
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*/ |
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int si476x_core_stop(struct si476x_core *core, bool soft) |
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{ |
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int err = 0; |
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atomic_set(&core->is_alive, 0); |
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if (soft) { |
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/* TODO: This probably shoud be a configurable option, |
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* so it is possible to have the chips keep their |
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* oscillators running |
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*/ |
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struct si476x_power_down_args args = { |
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.xosc = false, |
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}; |
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err = si476x_core_cmd_power_down(core, &args); |
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} |
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/* We couldn't disable those before |
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* 'si476x_core_cmd_power_down' since we expect to get CTS |
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* interrupt */ |
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if (core->client->irq) |
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disable_irq(core->client->irq); |
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else |
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cancel_delayed_work_sync(&core->status_monitor); |
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if (!soft) { |
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if (gpio_is_valid(core->gpio_reset)) |
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gpio_set_value_cansleep(core->gpio_reset, 0); |
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} |
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return err; |
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} |
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EXPORT_SYMBOL_GPL(si476x_core_stop); |
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/** |
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* si476x_core_set_power_state() - set the level at which the power is |
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* supplied for the chip. |
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* @core: Core device structure |
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* @next_state: enum si476x_power_state describing power state to |
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* switch to. |
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* |
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* Switch on all the required power supplies |
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* |
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* This function returns 0 in case of suvccess and negative error code |
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* otherwise. |
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*/ |
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int si476x_core_set_power_state(struct si476x_core *core, |
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enum si476x_power_state next_state) |
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{ |
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/* |
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It is not clear form the datasheet if it is possible to |
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work with device if not all power domains are operational. |
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So for now the power-up policy is "power-up all the things!" |
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*/ |
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int err = 0; |
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if (core->power_state == SI476X_POWER_INCONSISTENT) { |
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dev_err(&core->client->dev, |
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"The device in inconsistent power state\n"); |
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return -EINVAL; |
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} |
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if (next_state != core->power_state) { |
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switch (next_state) { |
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case SI476X_POWER_UP_FULL: |
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err = regulator_bulk_enable(ARRAY_SIZE(core->supplies), |
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core->supplies); |
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if (err < 0) { |
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core->power_state = SI476X_POWER_INCONSISTENT; |
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break; |
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} |
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/* |
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* Startup timing diagram recommends to have a |
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* 100 us delay between enabling of the power |
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* supplies and turning the tuner on. |
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*/ |
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udelay(100); |
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err = si476x_core_start(core, false); |
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if (err < 0) |
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goto disable_regulators; |
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core->power_state = next_state; |
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break; |
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case SI476X_POWER_DOWN: |
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core->power_state = next_state; |
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err = si476x_core_stop(core, false); |
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if (err < 0) |
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core->power_state = SI476X_POWER_INCONSISTENT; |
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disable_regulators: |
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err = regulator_bulk_disable(ARRAY_SIZE(core->supplies), |
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core->supplies); |
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if (err < 0) |
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core->power_state = SI476X_POWER_INCONSISTENT; |
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break; |
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default: |
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BUG(); |
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} |
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} |
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return err; |
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} |
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EXPORT_SYMBOL_GPL(si476x_core_set_power_state); |
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/** |
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* si476x_core_report_drainer_stop() - mark the completion of the RDS |
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* buffer drain porcess by the worker. |
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* |
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* @core: Core device structure |
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*/ |
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static inline void si476x_core_report_drainer_stop(struct si476x_core *core) |
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{ |
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mutex_lock(&core->rds_drainer_status_lock); |
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core->rds_drainer_is_working = false; |
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mutex_unlock(&core->rds_drainer_status_lock); |
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} |
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/** |
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* si476x_core_start_rds_drainer_once() - start RDS drainer worker if |
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* ther is none working, do nothing otherwise |
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* |
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* @core: Datastructure corresponding to the chip. |
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*/ |
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static inline void si476x_core_start_rds_drainer_once(struct si476x_core *core) |
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{ |
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mutex_lock(&core->rds_drainer_status_lock); |
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if (!core->rds_drainer_is_working) { |
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core->rds_drainer_is_working = true; |
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schedule_work(&core->rds_fifo_drainer); |
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} |
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mutex_unlock(&core->rds_drainer_status_lock); |
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} |
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/** |
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* si476x_core_drain_rds_fifo() - RDS buffer drainer. |
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* @work: struct work_struct being ppassed to the function by the |
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* kernel. |
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* |
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* Drain the contents of the RDS FIFO of |
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*/ |
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static void si476x_core_drain_rds_fifo(struct work_struct *work) |
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{ |
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int err; |
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struct si476x_core *core = container_of(work, struct si476x_core, |
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rds_fifo_drainer); |
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struct si476x_rds_status_report report; |
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si476x_core_lock(core); |
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err = si476x_core_cmd_fm_rds_status(core, true, false, false, &report); |
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if (!err) { |
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int i = report.rdsfifoused; |
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dev_dbg(&core->client->dev, |
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"%d elements in RDS FIFO. Draining.\n", i); |
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for (; i > 0; --i) { |
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err = si476x_core_cmd_fm_rds_status(core, false, false, |
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(i == 1), &report); |
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if (err < 0) |
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goto unlock; |
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kfifo_in(&core->rds_fifo, report.rds, |
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sizeof(report.rds)); |
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dev_dbg(&core->client->dev, "RDS data:\n %*ph\n", |
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(int)sizeof(report.rds), report.rds); |
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} |
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dev_dbg(&core->client->dev, "Drrrrained!\n"); |
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wake_up_interruptible(&core->rds_read_queue); |
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} |
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unlock: |
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si476x_core_unlock(core); |
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si476x_core_report_drainer_stop(core); |
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} |
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|
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/** |
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* si476x_core_pronounce_dead() |
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* |
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* @core: Core device structure |
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* |
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* Mark the device as being dead and wake up all potentially waiting |
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* threads of execution. |
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* |
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*/ |
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static void si476x_core_pronounce_dead(struct si476x_core *core) |
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{ |
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dev_info(&core->client->dev, "Core device is dead.\n"); |
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atomic_set(&core->is_alive, 0); |
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|
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/* Wake up al possible waiting processes */ |
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wake_up_interruptible(&core->rds_read_queue); |
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atomic_set(&core->cts, 1); |
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wake_up(&core->command); |
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atomic_set(&core->stc, 1); |
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wake_up(&core->tuning); |
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} |
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|
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/** |
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* si476x_core_i2c_xfer() |
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* |
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* @core: Core device structure |
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* @type: Transfer type |
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* @buf: Transfer buffer for/with data |
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* @count: Transfer buffer size |
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* |
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* Perfrom and I2C transfer(either read or write) and keep a counter |
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* of I/O errors. If the error counter rises above the threshold |
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* pronounce device dead. |
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* |
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* The function returns zero on succes or negative error code on |
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* failure. |
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*/ |
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int si476x_core_i2c_xfer(struct si476x_core *core, |
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enum si476x_i2c_type type, |
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char *buf, int count) |
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{ |
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static int io_errors_count; |
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int err; |
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if (type == SI476X_I2C_SEND) |
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err = i2c_master_send(core->client, buf, count); |
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else |
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err = i2c_master_recv(core->client, buf, count); |
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|
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if (err < 0) { |
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if (io_errors_count++ > SI476X_MAX_IO_ERRORS) |
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si476x_core_pronounce_dead(core); |
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} else { |
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io_errors_count = 0; |
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} |
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return err; |
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} |
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EXPORT_SYMBOL_GPL(si476x_core_i2c_xfer); |
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|
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/** |
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* si476x_core_get_status() |
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* @core: Core device structure |
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* |
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* Get the status byte of the core device by berforming one byte I2C |
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* read. |
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* |
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* The function returns a status value or a negative error code on |
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* error. |
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*/ |
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static int si476x_core_get_status(struct si476x_core *core) |
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{ |
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u8 response; |
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int err = si476x_core_i2c_xfer(core, SI476X_I2C_RECV, |
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&response, sizeof(response)); |
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|
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return (err < 0) ? err : response; |
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} |
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|
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/** |
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* si476x_core_get_and_signal_status() - IRQ dispatcher |
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* @core: Core device structure |
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* |
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* Dispatch the arrived interrupt request based on the value of the |
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* status byte reported by the tuner. |
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* |
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*/ |
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static void si476x_core_get_and_signal_status(struct si476x_core *core) |
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{ |
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int status = si476x_core_get_status(core); |
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if (status < 0) { |
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dev_err(&core->client->dev, "Failed to get status\n"); |
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return; |
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} |
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|
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if (status & SI476X_CTS) { |
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/* Unfortunately completions could not be used for |
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* signalling CTS since this flag cannot be cleared |
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* in status byte, and therefore once it becomes true |
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* multiple calls to 'complete' would cause the |
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* commands following the current one to be completed |
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* before they actually are */ |
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dev_dbg(&core->client->dev, "[interrupt] CTSINT\n"); |
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atomic_set(&core->cts, 1); |
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wake_up(&core->command); |
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} |
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|
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if (status & SI476X_FM_RDS_INT) { |
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dev_dbg(&core->client->dev, "[interrupt] RDSINT\n"); |
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si476x_core_start_rds_drainer_once(core); |
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} |
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|
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if (status & SI476X_STC_INT) { |
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dev_dbg(&core->client->dev, "[interrupt] STCINT\n"); |
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atomic_set(&core->stc, 1); |
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wake_up(&core->tuning); |
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} |
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} |
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|
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static void si476x_core_poll_loop(struct work_struct *work) |
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{ |
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struct si476x_core *core = SI476X_WORK_TO_CORE(work); |
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|
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si476x_core_get_and_signal_status(core); |
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|
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if (atomic_read(&core->is_alive)) |
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si476x_core_schedule_polling_work(core); |
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} |
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|
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static irqreturn_t si476x_core_interrupt(int irq, void *dev) |
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{ |
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struct si476x_core *core = dev; |
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|
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si476x_core_get_and_signal_status(core); |
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|
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return IRQ_HANDLED; |
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} |
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|
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/** |
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* si476x_core_fwver_to_revision() |
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* @core: Core device structure |
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* @func: Selects the boot function of the device: |
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* *_BOOTLOADER - Boot loader |
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* *_FM_RECEIVER - FM receiver |
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* *_AM_RECEIVER - AM receiver |
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* *_WB_RECEIVER - Weatherband receiver |
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* @major: Firmware major number |
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* @minor1: Firmware first minor number |
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* @minor2: Firmware second minor number |
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* |
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* Convert a chip's firmware version number into an offset that later |
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* will be used to as offset in "vtable" of tuner functions |
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* |
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* This function returns a positive offset in case of success and a -1 |
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* in case of failure. |
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*/ |
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static int si476x_core_fwver_to_revision(struct si476x_core *core, |
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int func, int major, |
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int minor1, int minor2) |
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{ |
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switch (func) { |
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case SI476X_FUNC_FM_RECEIVER: |
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switch (major) { |
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case 5: |
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return SI476X_REVISION_A10; |
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case 8: |
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return SI476X_REVISION_A20; |
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case 10: |
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return SI476X_REVISION_A30; |
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default: |
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goto unknown_revision; |
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} |
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case SI476X_FUNC_AM_RECEIVER: |
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switch (major) { |
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case 5: |
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return SI476X_REVISION_A10; |
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case 7: |
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return SI476X_REVISION_A20; |
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case 9: |
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return SI476X_REVISION_A30; |
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default: |
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goto unknown_revision; |
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} |
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case SI476X_FUNC_WB_RECEIVER: |
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switch (major) { |
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case 3: |
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return SI476X_REVISION_A10; |
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case 5: |
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return SI476X_REVISION_A20; |
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case 7: |
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return SI476X_REVISION_A30; |
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default: |
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goto unknown_revision; |
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} |
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case SI476X_FUNC_BOOTLOADER: |
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default: /* FALLTHROUGH */ |
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BUG(); |
|
return -1; |
|
} |
|
|
|
unknown_revision: |
|
dev_err(&core->client->dev, |
|
"Unsupported version of the firmware: %d.%d.%d, " |
|
"reverting to A10 compatible functions\n", |
|
major, minor1, minor2); |
|
|
|
return SI476X_REVISION_A10; |
|
} |
|
|
|
/** |
|
* si476x_core_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) |
|
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_err(&client->dev, "No platform data provided\n"); |
|
return -EINVAL; |
|
} |
|
|
|
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, "Failed to get 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 | |
|
IRQF_ONESHOT, |
|
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; |
|
|
|
rval = si476x_core_get_revision_info(core); |
|
if (rval < 0) { |
|
rval = -ENODEV; |
|
goto free_kfifo; |
|
} |
|
|
|
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_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", |
|
}, |
|
.probe = si476x_core_probe, |
|
.remove = si476x_core_remove, |
|
.id_table = si476x_id, |
|
}; |
|
module_i2c_driver(si476x_core_driver); |
|
|
|
|
|
MODULE_AUTHOR("Andrey Smirnov <[email protected]>"); |
|
MODULE_DESCRIPTION("Si4761/64/68 AM/FM MFD core device driver"); |
|
MODULE_LICENSE("GPL");
|
|
|