Quelle  rt5682-i2c.c   Sprache: C

// SPDX-License-Identifier: GPL-2.0-only
//
// rt5682.c  --  RT5682 ALSA SoC audio component driver
//
// Copyright 2018 Realtek Semiconductor Corp.
// Author: Bard Liao <bardliao@realtek.com>
//

#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/pm.h>
#include <linux/i2c.h>
#include <linux/platform_device.h>
#include <linux/spi/spi.h>
#include <linux/acpi.h>
#include <linux/gpio/consumer.h>
#include <linux/mutex.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/jack.h>
#include <sound/soc.h>
#include <sound/soc-dapm.h>
#include <sound/initval.h>
#include <sound/tlv.h>
#include <sound/rt5682.h>

#include "rl6231.h"
#include "rt5682.h"

static const struct rt5682_platform_data i2s_default_platform_data = {
 .dmic1_data_pin = RT5682_DMIC1_DATA_GPIO2,
 .dmic1_clk_pin = RT5682_DMIC1_CLK_GPIO3,
 .jd_src = RT5682_JD1,
 .btndet_delay = 16,
 .dai_clk_names[RT5682_DAI_WCLK_IDX] = "rt5682-dai-wclk",
 .dai_clk_names[RT5682_DAI_BCLK_IDX] = "rt5682-dai-bclk",
};

static const struct regmap_config rt5682_regmap = {
 .reg_bits = 16,
 .val_bits = 16,
 .max_register = RT5682_I2C_MODE,
 .volatile_reg = rt5682_volatile_register,
 .readable_reg = rt5682_readable_register,
 .cache_type = REGCACHE_MAPLE,
 .reg_defaults = rt5682_reg,
 .num_reg_defaults = RT5682_REG_NUM,
 .use_single_read = true,
 .use_single_write = true,
};

static void rt5682_jd_check_handler(struct work_struct *work)
{
 struct rt5682_priv *rt5682 = container_of(work, struct rt5682_priv,
  jd_check_work.work);

 if (snd_soc_component_read(rt5682->component, RT5682_AJD1_CTRL) & RT5682_JDH_RS_MASK)
  /* jack out */
  mod_delayed_work(system_power_efficient_wq,
     &rt5682->jack_detect_work, 0);
 else
  schedule_delayed_work(&rt5682->jd_check_work, 500);
}

static irqreturn_t rt5682_irq(int irq, void *data)
{
 struct rt5682_priv *rt5682 = data;

 mod_delayed_work(system_power_efficient_wq,
  &rt5682->jack_detect_work, msecs_to_jiffies(rt5682->irq_work_delay_time));

 return IRQ_HANDLED;
}

static struct snd_soc_dai_driver rt5682_dai[] = {
 {
  .name = "rt5682-aif1",
  .id = RT5682_AIF1,
  .playback = {
   .stream_name = "AIF1 Playback",
   .channels_min = 1,
   .channels_max = 2,
   .rates = RT5682_STEREO_RATES,
   .formats = RT5682_FORMATS,
  },
  .capture = {
   .stream_name = "AIF1 Capture",
   .channels_min = 1,
   .channels_max = 2,
   .rates = RT5682_STEREO_RATES,
   .formats = RT5682_FORMATS,
  },
  .ops = &rt5682_aif1_dai_ops,
 },
 {
  .name = "rt5682-aif2",
  .id = RT5682_AIF2,
  .capture = {
   .stream_name = "AIF2 Capture",
   .channels_min = 1,
   .channels_max = 2,
   .rates = RT5682_STEREO_RATES,
   .formats = RT5682_FORMATS,
  },
  .ops = &rt5682_aif2_dai_ops,
 },
};

static void rt5682_i2c_disable_regulators(void *data)
{
 struct rt5682_priv *rt5682 = data;

 regulator_bulk_disable(ARRAY_SIZE(rt5682->supplies), rt5682->supplies);
}

static int rt5682_i2c_probe(struct i2c_client *i2c)
{
 struct rt5682_platform_data *pdata = dev_get_platdata(&i2c->dev);
 struct rt5682_priv *rt5682;
 int i, ret;
 unsigned int val;

 rt5682 = devm_kzalloc(&i2c->dev, sizeof(struct rt5682_priv),
  GFP_KERNEL);
 if (!rt5682)
  return -ENOMEM;

 i2c_set_clientdata(i2c, rt5682);

 rt5682->i2c_dev = &i2c->dev;

 rt5682->pdata = i2s_default_platform_data;

 if (pdata)
  rt5682->pdata = *pdata;
 else
  rt5682_parse_dt(rt5682, &i2c->dev);

 rt5682->regmap = devm_regmap_init_i2c(i2c, &rt5682_regmap);
 if (IS_ERR(rt5682->regmap)) {
  ret = PTR_ERR(rt5682->regmap);
  dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
   ret);
  return ret;
 }

 for (i = 0; i < ARRAY_SIZE(rt5682->supplies); i++)
  rt5682->supplies[i].supply = rt5682_supply_names[i];

 ret = devm_regulator_bulk_get(&i2c->dev, ARRAY_SIZE(rt5682->supplies),
          rt5682->supplies);
 if (ret) {
  dev_err(&i2c->dev, "Failed to request supplies: %d\n", ret);
  return ret;
 }

 ret = regulator_bulk_enable(ARRAY_SIZE(rt5682->supplies),
        rt5682->supplies);
 if (ret) {
  dev_err(&i2c->dev, "Failed to enable supplies: %d\n", ret);
  return ret;
 }

 ret = devm_add_action_or_reset(&i2c->dev, rt5682_i2c_disable_regulators,
           rt5682);
 if (ret)
  return ret;

 ret = rt5682_get_ldo1(rt5682, &i2c->dev);
 if (ret)
  return ret;

 /* Sleep for 300 ms miniumum */
 usleep_range(300000, 350000);

 regmap_write(rt5682->regmap, RT5682_I2C_MODE, 0x1);
 usleep_range(10000, 15000);

 regmap_read(rt5682->regmap, RT5682_DEVICE_ID, &val);
 if (val != DEVICE_ID) {
  dev_err(&i2c->dev,
   "Device with ID register %x is not rt5682\n", val);
  return -ENODEV;
 }

 regmap_read(rt5682->regmap, RT5682_INT_DEVICE_ID, &val);
 if (val == 0x6956) {
  dev_dbg(&i2c->dev, "ALC5682I-VE device\n");
  rt5682->ve_ic = true;
 }

 mutex_init(&rt5682->calibrate_mutex);
 rt5682_calibrate(rt5682);

 rt5682_apply_patch_list(rt5682, &i2c->dev);

 regmap_write(rt5682->regmap, RT5682_DEPOP_1, 0x0000);

 /* DMIC pin*/
 if (rt5682->pdata.dmic1_data_pin != RT5682_DMIC1_NULL) {
  switch (rt5682->pdata.dmic1_data_pin) {
  case RT5682_DMIC1_DATA_GPIO2: /* share with LRCK2 */
   regmap_update_bits(rt5682->regmap, RT5682_DMIC_CTRL_1,
    RT5682_DMIC_1_DP_MASK, RT5682_DMIC_1_DP_GPIO2);
   regmap_update_bits(rt5682->regmap, RT5682_GPIO_CTRL_1,
    RT5682_GP2_PIN_MASK, RT5682_GP2_PIN_DMIC_SDA);
   break;

  case RT5682_DMIC1_DATA_GPIO5: /* share with DACDAT1 */
   regmap_update_bits(rt5682->regmap, RT5682_DMIC_CTRL_1,
    RT5682_DMIC_1_DP_MASK, RT5682_DMIC_1_DP_GPIO5);
   regmap_update_bits(rt5682->regmap, RT5682_GPIO_CTRL_1,
    RT5682_GP5_PIN_MASK, RT5682_GP5_PIN_DMIC_SDA);
   break;

  default:
   dev_warn(&i2c->dev, "invalid DMIC_DAT pin\n");
   break;
  }

  switch (rt5682->pdata.dmic1_clk_pin) {
  case RT5682_DMIC1_CLK_GPIO1: /* share with IRQ */
   regmap_update_bits(rt5682->regmap, RT5682_GPIO_CTRL_1,
    RT5682_GP1_PIN_MASK, RT5682_GP1_PIN_DMIC_CLK);
   break;

  case RT5682_DMIC1_CLK_GPIO3: /* share with BCLK2 */
   regmap_update_bits(rt5682->regmap, RT5682_GPIO_CTRL_1,
    RT5682_GP3_PIN_MASK, RT5682_GP3_PIN_DMIC_CLK);
   if (rt5682->pdata.dmic_clk_driving_high)
    regmap_update_bits(rt5682->regmap,
     RT5682_PAD_DRIVING_CTRL,
     RT5682_PAD_DRV_GP3_MASK,
     2 << RT5682_PAD_DRV_GP3_SFT);
   break;

  default:
   dev_warn(&i2c->dev, "invalid DMIC_CLK pin\n");
   break;
  }
 }

 regmap_update_bits(rt5682->regmap, RT5682_PWR_ANLG_1,
  RT5682_LDO1_DVO_MASK | RT5682_HP_DRIVER_MASK,
  RT5682_LDO1_DVO_12 | RT5682_HP_DRIVER_5X);
 regmap_write(rt5682->regmap, RT5682_MICBIAS_2, 0x0080);
 regmap_update_bits(rt5682->regmap, RT5682_GPIO_CTRL_1,
  RT5682_GP4_PIN_MASK | RT5682_GP5_PIN_MASK,
  RT5682_GP4_PIN_ADCDAT1 | RT5682_GP5_PIN_DACDAT1);
 regmap_write(rt5682->regmap, RT5682_TEST_MODE_CTRL_1, 0x0000);
 regmap_update_bits(rt5682->regmap, RT5682_BIAS_CUR_CTRL_8,
  RT5682_HPA_CP_BIAS_CTRL_MASK, RT5682_HPA_CP_BIAS_3UA);
 regmap_update_bits(rt5682->regmap, RT5682_CHARGE_PUMP_1,
  RT5682_CP_CLK_HP_MASK, RT5682_CP_CLK_HP_300KHZ);
 regmap_update_bits(rt5682->regmap, RT5682_HP_CHARGE_PUMP_1,
  RT5682_PM_HP_MASK, RT5682_PM_HP_HV);
 regmap_update_bits(rt5682->regmap, RT5682_DMIC_CTRL_1,
  RT5682_FIFO_CLK_DIV_MASK, RT5682_FIFO_CLK_DIV_2);

 INIT_DELAYED_WORK(&rt5682->jack_detect_work,
  rt5682_jack_detect_handler);
 INIT_DELAYED_WORK(&rt5682->jd_check_work,
  rt5682_jd_check_handler);

 if (i2c->irq) {
  ret = devm_request_threaded_irq(&i2c->dev, i2c->irq, NULL,
   rt5682_irq, IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING
   | IRQF_ONESHOT, "rt5682", rt5682);
  if (!ret)
   rt5682->irq = i2c->irq;
  else
   dev_err(&i2c->dev, "Failed to request IRQ: %d\n", ret);
 }

#ifdef CONFIG_COMMON_CLK
 /* Check if MCLK provided */
 rt5682->mclk = devm_clk_get_optional(&i2c->dev, "mclk");
 if (IS_ERR(rt5682->mclk))
  return PTR_ERR(rt5682->mclk);

 /* Register CCF DAI clock control */
 ret = rt5682_register_dai_clks(rt5682);
 if (ret)
  return ret;

 /* Initial setup for CCF */
 rt5682->lrck[RT5682_AIF1] = 48000;
#endif

 return devm_snd_soc_register_component(&i2c->dev,
            &rt5682_soc_component_dev,
            rt5682_dai, ARRAY_SIZE(rt5682_dai));
}

static void rt5682_i2c_shutdown(struct i2c_client *client)
{
 struct rt5682_priv *rt5682 = i2c_get_clientdata(client);

 disable_irq(client->irq);
 cancel_delayed_work_sync(&rt5682->jack_detect_work);
 cancel_delayed_work_sync(&rt5682->jd_check_work);

 rt5682_reset(rt5682);
}

static void rt5682_i2c_remove(struct i2c_client *client)
{
 rt5682_i2c_shutdown(client);
}

static const struct of_device_id rt5682_of_match[] = {
 {.compatible = "realtek,rt5682i"},
 { }
};
MODULE_DEVICE_TABLE(of, rt5682_of_match);

static const struct acpi_device_id rt5682_acpi_match[] = {
 { "10EC5682" },
 { }
};
MODULE_DEVICE_TABLE(acpi, rt5682_acpi_match);

static const struct i2c_device_id rt5682_i2c_id[] = {
 {"rt5682"},
 {}
};
MODULE_DEVICE_TABLE(i2c, rt5682_i2c_id);

static struct i2c_driver rt5682_i2c_driver = {
 .driver = {
  .name = "rt5682",
  .of_match_table = rt5682_of_match,
  .acpi_match_table = rt5682_acpi_match,
  .probe_type = PROBE_PREFER_ASYNCHRONOUS,
 },
 .probe = rt5682_i2c_probe,
 .remove = rt5682_i2c_remove,
 .shutdown = rt5682_i2c_shutdown,
 .id_table = rt5682_i2c_id,
};
module_i2c_driver(rt5682_i2c_driver);

MODULE_DESCRIPTION("ASoC RT5682 driver");
MODULE_AUTHOR("Bard Liao ");
MODULE_LICENSE("GPL v2");