cs4341.c 8.6 KB

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  1. /* SPDX-License-Identifier: GPL-2.0+ */
  2. /*
  3. * Cirrus Logic CS4341A ALSA SoC Codec Driver
  4. * Author: Alexander Shiyan <shc_work@mail.ru>
  5. */
  6. #include <linux/i2c.h>
  7. #include <linux/module.h>
  8. #include <linux/of.h>
  9. #include <linux/regmap.h>
  10. #include <linux/spi/spi.h>
  11. #include <sound/pcm.h>
  12. #include <sound/pcm_params.h>
  13. #include <sound/soc.h>
  14. #include <sound/tlv.h>
  15. #define CS4341_REG_MODE1 0x00
  16. #define CS4341_REG_MODE2 0x01
  17. #define CS4341_REG_MIX 0x02
  18. #define CS4341_REG_VOLA 0x03
  19. #define CS4341_REG_VOLB 0x04
  20. #define CS4341_MODE2_DIF (7 << 4)
  21. #define CS4341_MODE2_DIF_I2S_24 (0 << 4)
  22. #define CS4341_MODE2_DIF_I2S_16 (1 << 4)
  23. #define CS4341_MODE2_DIF_LJ_24 (2 << 4)
  24. #define CS4341_MODE2_DIF_RJ_24 (3 << 4)
  25. #define CS4341_MODE2_DIF_RJ_16 (5 << 4)
  26. #define CS4341_VOLX_MUTE (1 << 7)
  27. struct cs4341_priv {
  28. unsigned int fmt;
  29. struct regmap *regmap;
  30. struct regmap_config regcfg;
  31. };
  32. static const struct reg_default cs4341_reg_defaults[] = {
  33. { CS4341_REG_MODE1, 0x00 },
  34. { CS4341_REG_MODE2, 0x82 },
  35. { CS4341_REG_MIX, 0x49 },
  36. { CS4341_REG_VOLA, 0x80 },
  37. { CS4341_REG_VOLB, 0x80 },
  38. };
  39. static int cs4341_set_fmt(struct snd_soc_dai *dai, unsigned int format)
  40. {
  41. struct snd_soc_component *component = dai->component;
  42. struct cs4341_priv *cs4341 = snd_soc_component_get_drvdata(component);
  43. switch (format & SND_SOC_DAIFMT_MASTER_MASK) {
  44. case SND_SOC_DAIFMT_CBS_CFS:
  45. break;
  46. default:
  47. return -EINVAL;
  48. }
  49. switch (format & SND_SOC_DAIFMT_INV_MASK) {
  50. case SND_SOC_DAIFMT_NB_NF:
  51. break;
  52. default:
  53. return -EINVAL;
  54. }
  55. switch (format & SND_SOC_DAIFMT_FORMAT_MASK) {
  56. case SND_SOC_DAIFMT_I2S:
  57. case SND_SOC_DAIFMT_LEFT_J:
  58. case SND_SOC_DAIFMT_RIGHT_J:
  59. cs4341->fmt = format & SND_SOC_DAIFMT_FORMAT_MASK;
  60. break;
  61. default:
  62. return -EINVAL;
  63. }
  64. return 0;
  65. }
  66. static int cs4341_hw_params(struct snd_pcm_substream *substream,
  67. struct snd_pcm_hw_params *params,
  68. struct snd_soc_dai *dai)
  69. {
  70. struct snd_soc_component *component = dai->component;
  71. struct cs4341_priv *cs4341 = snd_soc_component_get_drvdata(component);
  72. unsigned int mode = 0;
  73. int b24 = 0;
  74. switch (params_format(params)) {
  75. case SNDRV_PCM_FORMAT_S24_LE:
  76. b24 = 1;
  77. break;
  78. case SNDRV_PCM_FORMAT_S16_LE:
  79. break;
  80. default:
  81. dev_err(component->dev, "Unsupported PCM format 0x%08x.\n",
  82. params_format(params));
  83. return -EINVAL;
  84. }
  85. switch (cs4341->fmt) {
  86. case SND_SOC_DAIFMT_I2S:
  87. mode = b24 ? CS4341_MODE2_DIF_I2S_24 : CS4341_MODE2_DIF_I2S_16;
  88. break;
  89. case SND_SOC_DAIFMT_LEFT_J:
  90. mode = CS4341_MODE2_DIF_LJ_24;
  91. break;
  92. case SND_SOC_DAIFMT_RIGHT_J:
  93. mode = b24 ? CS4341_MODE2_DIF_RJ_24 : CS4341_MODE2_DIF_RJ_16;
  94. break;
  95. default:
  96. dev_err(component->dev, "Unsupported DAI format 0x%08x.\n",
  97. cs4341->fmt);
  98. return -EINVAL;
  99. }
  100. return snd_soc_component_update_bits(component, CS4341_REG_MODE2,
  101. CS4341_MODE2_DIF, mode);
  102. }
  103. static int cs4341_mute(struct snd_soc_dai *dai, int mute, int direction)
  104. {
  105. struct snd_soc_component *component = dai->component;
  106. int ret;
  107. ret = snd_soc_component_update_bits(component, CS4341_REG_VOLA,
  108. CS4341_VOLX_MUTE,
  109. mute ? CS4341_VOLX_MUTE : 0);
  110. if (ret < 0)
  111. return ret;
  112. return snd_soc_component_update_bits(component, CS4341_REG_VOLB,
  113. CS4341_VOLX_MUTE,
  114. mute ? CS4341_VOLX_MUTE : 0);
  115. }
  116. static DECLARE_TLV_DB_SCALE(out_tlv, -9000, 100, 0);
  117. static const char * const deemph[] = {
  118. "None", "44.1k", "48k", "32k",
  119. };
  120. static const struct soc_enum deemph_enum =
  121. SOC_ENUM_SINGLE(CS4341_REG_MODE2, 2, 4, deemph);
  122. static const char * const srzc[] = {
  123. "Immediate", "Zero Cross", "Soft Ramp", "SR on ZC",
  124. };
  125. static const struct soc_enum srzc_enum =
  126. SOC_ENUM_SINGLE(CS4341_REG_MIX, 5, 4, srzc);
  127. static const struct snd_soc_dapm_widget cs4341_dapm_widgets[] = {
  128. SND_SOC_DAPM_DAC("HiFi DAC", NULL, SND_SOC_NOPM, 0, 0),
  129. SND_SOC_DAPM_OUTPUT("OutA"),
  130. SND_SOC_DAPM_OUTPUT("OutB"),
  131. };
  132. static const struct snd_soc_dapm_route cs4341_routes[] = {
  133. { "OutA", NULL, "HiFi DAC" },
  134. { "OutB", NULL, "HiFi DAC" },
  135. { "DAC Playback", NULL, "OutA" },
  136. { "DAC Playback", NULL, "OutB" },
  137. };
  138. static const struct snd_kcontrol_new cs4341_controls[] = {
  139. SOC_DOUBLE_R_TLV("Master Playback Volume",
  140. CS4341_REG_VOLA, CS4341_REG_VOLB, 0, 90, 1, out_tlv),
  141. SOC_ENUM("De-Emphasis Control", deemph_enum),
  142. SOC_ENUM("Soft Ramp Zero Cross Control", srzc_enum),
  143. SOC_SINGLE("Auto-Mute Switch", CS4341_REG_MODE2, 7, 1, 0),
  144. SOC_SINGLE("Popguard Transient Switch", CS4341_REG_MODE2, 1, 1, 0),
  145. };
  146. static const struct snd_soc_dai_ops cs4341_dai_ops = {
  147. .set_fmt = cs4341_set_fmt,
  148. .hw_params = cs4341_hw_params,
  149. .mute_stream = cs4341_mute,
  150. .no_capture_mute = 1,
  151. };
  152. static struct snd_soc_dai_driver cs4341_dai = {
  153. .name = "cs4341a-hifi",
  154. .playback = {
  155. .stream_name = "DAC Playback",
  156. .channels_min = 1,
  157. .channels_max = 2,
  158. .rates = SNDRV_PCM_RATE_8000_96000,
  159. .formats = SNDRV_PCM_FMTBIT_S16_LE |
  160. SNDRV_PCM_FMTBIT_S24_LE,
  161. },
  162. .ops = &cs4341_dai_ops,
  163. .symmetric_rates = 1,
  164. };
  165. static const struct snd_soc_component_driver soc_component_cs4341 = {
  166. .controls = cs4341_controls,
  167. .num_controls = ARRAY_SIZE(cs4341_controls),
  168. .dapm_widgets = cs4341_dapm_widgets,
  169. .num_dapm_widgets = ARRAY_SIZE(cs4341_dapm_widgets),
  170. .dapm_routes = cs4341_routes,
  171. .num_dapm_routes = ARRAY_SIZE(cs4341_routes),
  172. .idle_bias_on = 1,
  173. .use_pmdown_time = 1,
  174. .endianness = 1,
  175. .non_legacy_dai_naming = 1,
  176. };
  177. static const struct of_device_id __maybe_unused cs4341_dt_ids[] = {
  178. { .compatible = "cirrus,cs4341a", },
  179. { }
  180. };
  181. MODULE_DEVICE_TABLE(of, cs4341_dt_ids);
  182. static int cs4341_probe(struct device *dev)
  183. {
  184. struct cs4341_priv *cs4341 = dev_get_drvdata(dev);
  185. int i;
  186. for (i = 0; i < ARRAY_SIZE(cs4341_reg_defaults); i++)
  187. regmap_write(cs4341->regmap, cs4341_reg_defaults[i].reg,
  188. cs4341_reg_defaults[i].def);
  189. return devm_snd_soc_register_component(dev, &soc_component_cs4341,
  190. &cs4341_dai, 1);
  191. }
  192. #if IS_ENABLED(CONFIG_I2C)
  193. static int cs4341_i2c_probe(struct i2c_client *i2c,
  194. const struct i2c_device_id *id)
  195. {
  196. struct cs4341_priv *cs4341;
  197. cs4341 = devm_kzalloc(&i2c->dev, sizeof(*cs4341), GFP_KERNEL);
  198. if (!cs4341)
  199. return -ENOMEM;
  200. i2c_set_clientdata(i2c, cs4341);
  201. cs4341->regcfg.reg_bits = 8;
  202. cs4341->regcfg.val_bits = 8;
  203. cs4341->regcfg.max_register = CS4341_REG_VOLB;
  204. cs4341->regcfg.cache_type = REGCACHE_FLAT;
  205. cs4341->regcfg.reg_defaults = cs4341_reg_defaults;
  206. cs4341->regcfg.num_reg_defaults = ARRAY_SIZE(cs4341_reg_defaults);
  207. cs4341->regmap = devm_regmap_init_i2c(i2c, &cs4341->regcfg);
  208. if (IS_ERR(cs4341->regmap))
  209. return PTR_ERR(cs4341->regmap);
  210. return cs4341_probe(&i2c->dev);
  211. }
  212. static const struct i2c_device_id cs4341_i2c_id[] = {
  213. { "cs4341", 0 },
  214. { }
  215. };
  216. MODULE_DEVICE_TABLE(i2c, cs4341_i2c_id);
  217. static struct i2c_driver cs4341_i2c_driver = {
  218. .driver = {
  219. .name = "cs4341-i2c",
  220. .of_match_table = of_match_ptr(cs4341_dt_ids),
  221. },
  222. .probe = cs4341_i2c_probe,
  223. .id_table = cs4341_i2c_id,
  224. };
  225. #endif
  226. #if defined(CONFIG_SPI_MASTER)
  227. static bool cs4341_reg_readable(struct device *dev, unsigned int reg)
  228. {
  229. return false;
  230. }
  231. static int cs4341_spi_probe(struct spi_device *spi)
  232. {
  233. struct cs4341_priv *cs4341;
  234. int ret;
  235. cs4341 = devm_kzalloc(&spi->dev, sizeof(*cs4341), GFP_KERNEL);
  236. if (!cs4341)
  237. return -ENOMEM;
  238. if (!spi->bits_per_word)
  239. spi->bits_per_word = 8;
  240. if (!spi->max_speed_hz)
  241. spi->max_speed_hz = 6000000;
  242. ret = spi_setup(spi);
  243. if (ret)
  244. return ret;
  245. spi_set_drvdata(spi, cs4341);
  246. cs4341->regcfg.reg_bits = 16;
  247. cs4341->regcfg.val_bits = 8;
  248. cs4341->regcfg.write_flag_mask = 0x20;
  249. cs4341->regcfg.max_register = CS4341_REG_VOLB;
  250. cs4341->regcfg.cache_type = REGCACHE_FLAT;
  251. cs4341->regcfg.readable_reg = cs4341_reg_readable;
  252. cs4341->regcfg.reg_defaults = cs4341_reg_defaults;
  253. cs4341->regcfg.num_reg_defaults = ARRAY_SIZE(cs4341_reg_defaults);
  254. cs4341->regmap = devm_regmap_init_spi(spi, &cs4341->regcfg);
  255. if (IS_ERR(cs4341->regmap))
  256. return PTR_ERR(cs4341->regmap);
  257. return cs4341_probe(&spi->dev);
  258. }
  259. static struct spi_driver cs4341_spi_driver = {
  260. .driver = {
  261. .name = "cs4341-spi",
  262. .of_match_table = of_match_ptr(cs4341_dt_ids),
  263. },
  264. .probe = cs4341_spi_probe,
  265. };
  266. #endif
  267. static int __init cs4341_init(void)
  268. {
  269. int ret = 0;
  270. #if IS_ENABLED(CONFIG_I2C)
  271. ret = i2c_add_driver(&cs4341_i2c_driver);
  272. if (ret)
  273. return ret;
  274. #endif
  275. #if defined(CONFIG_SPI_MASTER)
  276. ret = spi_register_driver(&cs4341_spi_driver);
  277. #endif
  278. return ret;
  279. }
  280. module_init(cs4341_init);
  281. static void __exit cs4341_exit(void)
  282. {
  283. #if IS_ENABLED(CONFIG_I2C)
  284. i2c_del_driver(&cs4341_i2c_driver);
  285. #endif
  286. #if defined(CONFIG_SPI_MASTER)
  287. spi_unregister_driver(&cs4341_spi_driver);
  288. #endif
  289. }
  290. module_exit(cs4341_exit);
  291. MODULE_AUTHOR("Alexander Shiyan <shc_work@mail.ru>");
  292. MODULE_DESCRIPTION("Cirrus Logic CS4341 ALSA SoC Codec Driver");
  293. MODULE_LICENSE("GPL");