wm8776.c 13 KB

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  1. // SPDX-License-Identifier: GPL-2.0-only
  2. /*
  3. * wm8776.c -- WM8776 ALSA SoC Audio driver
  4. *
  5. * Copyright 2009-12 Wolfson Microelectronics plc
  6. *
  7. * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
  8. *
  9. * TODO: Input ALC/limiter support
  10. */
  11. #include <linux/module.h>
  12. #include <linux/moduleparam.h>
  13. #include <linux/init.h>
  14. #include <linux/delay.h>
  15. #include <linux/pm.h>
  16. #include <linux/i2c.h>
  17. #include <linux/of_device.h>
  18. #include <linux/regmap.h>
  19. #include <linux/spi/spi.h>
  20. #include <linux/slab.h>
  21. #include <sound/core.h>
  22. #include <sound/pcm.h>
  23. #include <sound/pcm_params.h>
  24. #include <sound/soc.h>
  25. #include <sound/initval.h>
  26. #include <sound/tlv.h>
  27. #include "wm8776.h"
  28. enum wm8776_chip_type {
  29. WM8775 = 1,
  30. WM8776,
  31. };
  32. /* codec private data */
  33. struct wm8776_priv {
  34. struct regmap *regmap;
  35. int sysclk[2];
  36. };
  37. static const struct reg_default wm8776_reg_defaults[] = {
  38. { 0, 0x79 },
  39. { 1, 0x79 },
  40. { 2, 0x79 },
  41. { 3, 0xff },
  42. { 4, 0xff },
  43. { 5, 0xff },
  44. { 6, 0x00 },
  45. { 7, 0x90 },
  46. { 8, 0x00 },
  47. { 9, 0x00 },
  48. { 10, 0x22 },
  49. { 11, 0x22 },
  50. { 12, 0x22 },
  51. { 13, 0x08 },
  52. { 14, 0xcf },
  53. { 15, 0xcf },
  54. { 16, 0x7b },
  55. { 17, 0x00 },
  56. { 18, 0x32 },
  57. { 19, 0x00 },
  58. { 20, 0xa6 },
  59. { 21, 0x01 },
  60. { 22, 0x01 },
  61. };
  62. static bool wm8776_volatile(struct device *dev, unsigned int reg)
  63. {
  64. switch (reg) {
  65. case WM8776_RESET:
  66. return true;
  67. default:
  68. return false;
  69. }
  70. }
  71. static int wm8776_reset(struct snd_soc_component *component)
  72. {
  73. return snd_soc_component_write(component, WM8776_RESET, 0);
  74. }
  75. static const DECLARE_TLV_DB_SCALE(hp_tlv, -12100, 100, 1);
  76. static const DECLARE_TLV_DB_SCALE(dac_tlv, -12750, 50, 1);
  77. static const DECLARE_TLV_DB_SCALE(adc_tlv, -10350, 50, 1);
  78. static const struct snd_kcontrol_new wm8776_snd_controls[] = {
  79. SOC_DOUBLE_R_TLV("Headphone Playback Volume", WM8776_HPLVOL, WM8776_HPRVOL,
  80. 0, 127, 0, hp_tlv),
  81. SOC_DOUBLE_R_TLV("Digital Playback Volume", WM8776_DACLVOL, WM8776_DACRVOL,
  82. 0, 255, 0, dac_tlv),
  83. SOC_SINGLE("Digital Playback ZC Switch", WM8776_DACCTRL1, 0, 1, 0),
  84. SOC_SINGLE("Deemphasis Switch", WM8776_DACCTRL2, 0, 1, 0),
  85. SOC_DOUBLE_R_TLV("Capture Volume", WM8776_ADCLVOL, WM8776_ADCRVOL,
  86. 0, 255, 0, adc_tlv),
  87. SOC_DOUBLE("Capture Switch", WM8776_ADCMUX, 7, 6, 1, 1),
  88. SOC_DOUBLE_R("Capture ZC Switch", WM8776_ADCLVOL, WM8776_ADCRVOL, 8, 1, 0),
  89. SOC_SINGLE("Capture HPF Switch", WM8776_ADCIFCTRL, 8, 1, 1),
  90. };
  91. static const struct snd_kcontrol_new inmix_controls[] = {
  92. SOC_DAPM_SINGLE("AIN1 Switch", WM8776_ADCMUX, 0, 1, 0),
  93. SOC_DAPM_SINGLE("AIN2 Switch", WM8776_ADCMUX, 1, 1, 0),
  94. SOC_DAPM_SINGLE("AIN3 Switch", WM8776_ADCMUX, 2, 1, 0),
  95. SOC_DAPM_SINGLE("AIN4 Switch", WM8776_ADCMUX, 3, 1, 0),
  96. SOC_DAPM_SINGLE("AIN5 Switch", WM8776_ADCMUX, 4, 1, 0),
  97. };
  98. static const struct snd_kcontrol_new outmix_controls[] = {
  99. SOC_DAPM_SINGLE("DAC Switch", WM8776_OUTMUX, 0, 1, 0),
  100. SOC_DAPM_SINGLE("AUX Switch", WM8776_OUTMUX, 1, 1, 0),
  101. SOC_DAPM_SINGLE("Bypass Switch", WM8776_OUTMUX, 2, 1, 0),
  102. };
  103. static const struct snd_soc_dapm_widget wm8776_dapm_widgets[] = {
  104. SND_SOC_DAPM_INPUT("AUX"),
  105. SND_SOC_DAPM_INPUT("AIN1"),
  106. SND_SOC_DAPM_INPUT("AIN2"),
  107. SND_SOC_DAPM_INPUT("AIN3"),
  108. SND_SOC_DAPM_INPUT("AIN4"),
  109. SND_SOC_DAPM_INPUT("AIN5"),
  110. SND_SOC_DAPM_MIXER("Input Mixer", WM8776_PWRDOWN, 6, 1,
  111. inmix_controls, ARRAY_SIZE(inmix_controls)),
  112. SND_SOC_DAPM_ADC("ADC", "Capture", WM8776_PWRDOWN, 1, 1),
  113. SND_SOC_DAPM_DAC("DAC", "Playback", WM8776_PWRDOWN, 2, 1),
  114. SND_SOC_DAPM_MIXER("Output Mixer", SND_SOC_NOPM, 0, 0,
  115. outmix_controls, ARRAY_SIZE(outmix_controls)),
  116. SND_SOC_DAPM_PGA("Headphone PGA", WM8776_PWRDOWN, 3, 1, NULL, 0),
  117. SND_SOC_DAPM_OUTPUT("VOUT"),
  118. SND_SOC_DAPM_OUTPUT("HPOUTL"),
  119. SND_SOC_DAPM_OUTPUT("HPOUTR"),
  120. };
  121. static const struct snd_soc_dapm_route routes[] = {
  122. { "Input Mixer", "AIN1 Switch", "AIN1" },
  123. { "Input Mixer", "AIN2 Switch", "AIN2" },
  124. { "Input Mixer", "AIN3 Switch", "AIN3" },
  125. { "Input Mixer", "AIN4 Switch", "AIN4" },
  126. { "Input Mixer", "AIN5 Switch", "AIN5" },
  127. { "ADC", NULL, "Input Mixer" },
  128. { "Output Mixer", "DAC Switch", "DAC" },
  129. { "Output Mixer", "AUX Switch", "AUX" },
  130. { "Output Mixer", "Bypass Switch", "Input Mixer" },
  131. { "VOUT", NULL, "Output Mixer" },
  132. { "Headphone PGA", NULL, "Output Mixer" },
  133. { "HPOUTL", NULL, "Headphone PGA" },
  134. { "HPOUTR", NULL, "Headphone PGA" },
  135. };
  136. static int wm8776_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
  137. {
  138. struct snd_soc_component *component = dai->component;
  139. int reg, iface, master;
  140. switch (dai->driver->id) {
  141. case WM8776_DAI_DAC:
  142. reg = WM8776_DACIFCTRL;
  143. master = 0x80;
  144. break;
  145. case WM8776_DAI_ADC:
  146. reg = WM8776_ADCIFCTRL;
  147. master = 0x100;
  148. break;
  149. default:
  150. return -EINVAL;
  151. }
  152. iface = 0;
  153. switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
  154. case SND_SOC_DAIFMT_CBM_CFM:
  155. break;
  156. case SND_SOC_DAIFMT_CBS_CFS:
  157. master = 0;
  158. break;
  159. default:
  160. return -EINVAL;
  161. }
  162. switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
  163. case SND_SOC_DAIFMT_I2S:
  164. iface |= 0x0002;
  165. break;
  166. case SND_SOC_DAIFMT_RIGHT_J:
  167. break;
  168. case SND_SOC_DAIFMT_LEFT_J:
  169. iface |= 0x0001;
  170. break;
  171. default:
  172. return -EINVAL;
  173. }
  174. switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
  175. case SND_SOC_DAIFMT_NB_NF:
  176. break;
  177. case SND_SOC_DAIFMT_IB_IF:
  178. iface |= 0x00c;
  179. break;
  180. case SND_SOC_DAIFMT_IB_NF:
  181. iface |= 0x008;
  182. break;
  183. case SND_SOC_DAIFMT_NB_IF:
  184. iface |= 0x004;
  185. break;
  186. default:
  187. return -EINVAL;
  188. }
  189. /* Finally, write out the values */
  190. snd_soc_component_update_bits(component, reg, 0xf, iface);
  191. snd_soc_component_update_bits(component, WM8776_MSTRCTRL, 0x180, master);
  192. return 0;
  193. }
  194. static int mclk_ratios[] = {
  195. 128,
  196. 192,
  197. 256,
  198. 384,
  199. 512,
  200. 768,
  201. };
  202. static int wm8776_hw_params(struct snd_pcm_substream *substream,
  203. struct snd_pcm_hw_params *params,
  204. struct snd_soc_dai *dai)
  205. {
  206. struct snd_soc_component *component = dai->component;
  207. struct wm8776_priv *wm8776 = snd_soc_component_get_drvdata(component);
  208. int iface_reg, iface;
  209. int ratio_shift, master;
  210. int i;
  211. switch (dai->driver->id) {
  212. case WM8776_DAI_DAC:
  213. iface_reg = WM8776_DACIFCTRL;
  214. master = 0x80;
  215. ratio_shift = 4;
  216. break;
  217. case WM8776_DAI_ADC:
  218. iface_reg = WM8776_ADCIFCTRL;
  219. master = 0x100;
  220. ratio_shift = 0;
  221. break;
  222. default:
  223. return -EINVAL;
  224. }
  225. /* Set word length */
  226. switch (params_width(params)) {
  227. case 16:
  228. iface = 0;
  229. break;
  230. case 20:
  231. iface = 0x10;
  232. break;
  233. case 24:
  234. iface = 0x20;
  235. break;
  236. case 32:
  237. iface = 0x30;
  238. break;
  239. default:
  240. dev_err(component->dev, "Unsupported sample size: %i\n",
  241. params_width(params));
  242. return -EINVAL;
  243. }
  244. /* Only need to set MCLK/LRCLK ratio if we're master */
  245. if (snd_soc_component_read(component, WM8776_MSTRCTRL) & master) {
  246. for (i = 0; i < ARRAY_SIZE(mclk_ratios); i++) {
  247. if (wm8776->sysclk[dai->driver->id] / params_rate(params)
  248. == mclk_ratios[i])
  249. break;
  250. }
  251. if (i == ARRAY_SIZE(mclk_ratios)) {
  252. dev_err(component->dev,
  253. "Unable to configure MCLK ratio %d/%d\n",
  254. wm8776->sysclk[dai->driver->id], params_rate(params));
  255. return -EINVAL;
  256. }
  257. dev_dbg(component->dev, "MCLK is %dfs\n", mclk_ratios[i]);
  258. snd_soc_component_update_bits(component, WM8776_MSTRCTRL,
  259. 0x7 << ratio_shift, i << ratio_shift);
  260. } else {
  261. dev_dbg(component->dev, "DAI in slave mode\n");
  262. }
  263. snd_soc_component_update_bits(component, iface_reg, 0x30, iface);
  264. return 0;
  265. }
  266. static int wm8776_mute(struct snd_soc_dai *dai, int mute, int direction)
  267. {
  268. struct snd_soc_component *component = dai->component;
  269. return snd_soc_component_write(component, WM8776_DACMUTE, !!mute);
  270. }
  271. static int wm8776_set_sysclk(struct snd_soc_dai *dai,
  272. int clk_id, unsigned int freq, int dir)
  273. {
  274. struct snd_soc_component *component = dai->component;
  275. struct wm8776_priv *wm8776 = snd_soc_component_get_drvdata(component);
  276. if (WARN_ON(dai->driver->id >= ARRAY_SIZE(wm8776->sysclk)))
  277. return -EINVAL;
  278. wm8776->sysclk[dai->driver->id] = freq;
  279. return 0;
  280. }
  281. static int wm8776_set_bias_level(struct snd_soc_component *component,
  282. enum snd_soc_bias_level level)
  283. {
  284. struct wm8776_priv *wm8776 = snd_soc_component_get_drvdata(component);
  285. switch (level) {
  286. case SND_SOC_BIAS_ON:
  287. break;
  288. case SND_SOC_BIAS_PREPARE:
  289. break;
  290. case SND_SOC_BIAS_STANDBY:
  291. if (snd_soc_component_get_bias_level(component) == SND_SOC_BIAS_OFF) {
  292. regcache_sync(wm8776->regmap);
  293. /* Disable the global powerdown; DAPM does the rest */
  294. snd_soc_component_update_bits(component, WM8776_PWRDOWN, 1, 0);
  295. }
  296. break;
  297. case SND_SOC_BIAS_OFF:
  298. snd_soc_component_update_bits(component, WM8776_PWRDOWN, 1, 1);
  299. break;
  300. }
  301. return 0;
  302. }
  303. #define WM8776_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
  304. SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
  305. static const struct snd_soc_dai_ops wm8776_dac_ops = {
  306. .mute_stream = wm8776_mute,
  307. .hw_params = wm8776_hw_params,
  308. .set_fmt = wm8776_set_fmt,
  309. .set_sysclk = wm8776_set_sysclk,
  310. .no_capture_mute = 1,
  311. };
  312. static const struct snd_soc_dai_ops wm8776_adc_ops = {
  313. .hw_params = wm8776_hw_params,
  314. .set_fmt = wm8776_set_fmt,
  315. .set_sysclk = wm8776_set_sysclk,
  316. };
  317. static struct snd_soc_dai_driver wm8776_dai[] = {
  318. {
  319. .name = "wm8776-hifi-playback",
  320. .id = WM8776_DAI_DAC,
  321. .playback = {
  322. .stream_name = "Playback",
  323. .channels_min = 2,
  324. .channels_max = 2,
  325. .rates = SNDRV_PCM_RATE_CONTINUOUS,
  326. .rate_min = 32000,
  327. .rate_max = 192000,
  328. .formats = WM8776_FORMATS,
  329. },
  330. .ops = &wm8776_dac_ops,
  331. },
  332. {
  333. .name = "wm8776-hifi-capture",
  334. .id = WM8776_DAI_ADC,
  335. .capture = {
  336. .stream_name = "Capture",
  337. .channels_min = 2,
  338. .channels_max = 2,
  339. .rates = SNDRV_PCM_RATE_CONTINUOUS,
  340. .rate_min = 32000,
  341. .rate_max = 96000,
  342. .formats = WM8776_FORMATS,
  343. },
  344. .ops = &wm8776_adc_ops,
  345. },
  346. };
  347. static int wm8776_probe(struct snd_soc_component *component)
  348. {
  349. int ret = 0;
  350. ret = wm8776_reset(component);
  351. if (ret < 0) {
  352. dev_err(component->dev, "Failed to issue reset: %d\n", ret);
  353. return ret;
  354. }
  355. /* Latch the update bits; right channel only since we always
  356. * update both. */
  357. snd_soc_component_update_bits(component, WM8776_HPRVOL, 0x100, 0x100);
  358. snd_soc_component_update_bits(component, WM8776_DACRVOL, 0x100, 0x100);
  359. return ret;
  360. }
  361. static const struct snd_soc_component_driver soc_component_dev_wm8776 = {
  362. .probe = wm8776_probe,
  363. .set_bias_level = wm8776_set_bias_level,
  364. .controls = wm8776_snd_controls,
  365. .num_controls = ARRAY_SIZE(wm8776_snd_controls),
  366. .dapm_widgets = wm8776_dapm_widgets,
  367. .num_dapm_widgets = ARRAY_SIZE(wm8776_dapm_widgets),
  368. .dapm_routes = routes,
  369. .num_dapm_routes = ARRAY_SIZE(routes),
  370. .suspend_bias_off = 1,
  371. .idle_bias_on = 1,
  372. .use_pmdown_time = 1,
  373. .endianness = 1,
  374. .non_legacy_dai_naming = 1,
  375. };
  376. static const struct of_device_id wm8776_of_match[] = {
  377. { .compatible = "wlf,wm8776", },
  378. { }
  379. };
  380. MODULE_DEVICE_TABLE(of, wm8776_of_match);
  381. static const struct regmap_config wm8776_regmap = {
  382. .reg_bits = 7,
  383. .val_bits = 9,
  384. .max_register = WM8776_RESET,
  385. .reg_defaults = wm8776_reg_defaults,
  386. .num_reg_defaults = ARRAY_SIZE(wm8776_reg_defaults),
  387. .cache_type = REGCACHE_RBTREE,
  388. .volatile_reg = wm8776_volatile,
  389. };
  390. #if defined(CONFIG_SPI_MASTER)
  391. static int wm8776_spi_probe(struct spi_device *spi)
  392. {
  393. struct wm8776_priv *wm8776;
  394. int ret;
  395. wm8776 = devm_kzalloc(&spi->dev, sizeof(struct wm8776_priv),
  396. GFP_KERNEL);
  397. if (wm8776 == NULL)
  398. return -ENOMEM;
  399. wm8776->regmap = devm_regmap_init_spi(spi, &wm8776_regmap);
  400. if (IS_ERR(wm8776->regmap))
  401. return PTR_ERR(wm8776->regmap);
  402. spi_set_drvdata(spi, wm8776);
  403. ret = devm_snd_soc_register_component(&spi->dev,
  404. &soc_component_dev_wm8776, wm8776_dai, ARRAY_SIZE(wm8776_dai));
  405. return ret;
  406. }
  407. static struct spi_driver wm8776_spi_driver = {
  408. .driver = {
  409. .name = "wm8776",
  410. .of_match_table = wm8776_of_match,
  411. },
  412. .probe = wm8776_spi_probe,
  413. };
  414. #endif /* CONFIG_SPI_MASTER */
  415. #if IS_ENABLED(CONFIG_I2C)
  416. static int wm8776_i2c_probe(struct i2c_client *i2c,
  417. const struct i2c_device_id *id)
  418. {
  419. struct wm8776_priv *wm8776;
  420. int ret;
  421. wm8776 = devm_kzalloc(&i2c->dev, sizeof(struct wm8776_priv),
  422. GFP_KERNEL);
  423. if (wm8776 == NULL)
  424. return -ENOMEM;
  425. wm8776->regmap = devm_regmap_init_i2c(i2c, &wm8776_regmap);
  426. if (IS_ERR(wm8776->regmap))
  427. return PTR_ERR(wm8776->regmap);
  428. i2c_set_clientdata(i2c, wm8776);
  429. ret = devm_snd_soc_register_component(&i2c->dev,
  430. &soc_component_dev_wm8776, wm8776_dai, ARRAY_SIZE(wm8776_dai));
  431. return ret;
  432. }
  433. static const struct i2c_device_id wm8776_i2c_id[] = {
  434. { "wm8775", WM8775 },
  435. { "wm8776", WM8776 },
  436. { }
  437. };
  438. MODULE_DEVICE_TABLE(i2c, wm8776_i2c_id);
  439. static struct i2c_driver wm8776_i2c_driver = {
  440. .driver = {
  441. .name = "wm8776",
  442. .of_match_table = wm8776_of_match,
  443. },
  444. .probe = wm8776_i2c_probe,
  445. .id_table = wm8776_i2c_id,
  446. };
  447. #endif
  448. static int __init wm8776_modinit(void)
  449. {
  450. int ret = 0;
  451. #if IS_ENABLED(CONFIG_I2C)
  452. ret = i2c_add_driver(&wm8776_i2c_driver);
  453. if (ret != 0) {
  454. printk(KERN_ERR "Failed to register wm8776 I2C driver: %d\n",
  455. ret);
  456. }
  457. #endif
  458. #if defined(CONFIG_SPI_MASTER)
  459. ret = spi_register_driver(&wm8776_spi_driver);
  460. if (ret != 0) {
  461. printk(KERN_ERR "Failed to register wm8776 SPI driver: %d\n",
  462. ret);
  463. }
  464. #endif
  465. return ret;
  466. }
  467. module_init(wm8776_modinit);
  468. static void __exit wm8776_exit(void)
  469. {
  470. #if IS_ENABLED(CONFIG_I2C)
  471. i2c_del_driver(&wm8776_i2c_driver);
  472. #endif
  473. #if defined(CONFIG_SPI_MASTER)
  474. spi_unregister_driver(&wm8776_spi_driver);
  475. #endif
  476. }
  477. module_exit(wm8776_exit);
  478. MODULE_DESCRIPTION("ASoC WM8776 driver");
  479. MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
  480. MODULE_LICENSE("GPL");