pcm179x.c 5.6 KB

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  1. // SPDX-License-Identifier: GPL-2.0-or-later
  2. /*
  3. * PCM179X ASoC codec driver
  4. *
  5. * Copyright (c) Amarula Solutions B.V. 2013
  6. *
  7. * Michael Trimarchi <michael@amarulasolutions.com>
  8. */
  9. #include <linux/module.h>
  10. #include <linux/slab.h>
  11. #include <linux/kernel.h>
  12. #include <linux/device.h>
  13. #include <sound/core.h>
  14. #include <sound/pcm.h>
  15. #include <sound/pcm_params.h>
  16. #include <sound/initval.h>
  17. #include <sound/soc.h>
  18. #include <sound/tlv.h>
  19. #include <linux/of.h>
  20. #include "pcm179x.h"
  21. #define PCM179X_DAC_VOL_LEFT 0x10
  22. #define PCM179X_DAC_VOL_RIGHT 0x11
  23. #define PCM179X_FMT_CONTROL 0x12
  24. #define PCM179X_MODE_CONTROL 0x13
  25. #define PCM179X_SOFT_MUTE PCM179X_FMT_CONTROL
  26. #define PCM179X_FMT_MASK 0x70
  27. #define PCM179X_FMT_SHIFT 4
  28. #define PCM179X_MUTE_MASK 0x01
  29. #define PCM179X_MUTE_SHIFT 0
  30. #define PCM179X_ATLD_ENABLE (1 << 7)
  31. static const struct reg_default pcm179x_reg_defaults[] = {
  32. { 0x10, 0xff },
  33. { 0x11, 0xff },
  34. { 0x12, 0x50 },
  35. { 0x13, 0x00 },
  36. { 0x14, 0x00 },
  37. { 0x15, 0x01 },
  38. { 0x16, 0x00 },
  39. { 0x17, 0x00 },
  40. };
  41. static bool pcm179x_accessible_reg(struct device *dev, unsigned int reg)
  42. {
  43. return reg >= 0x10 && reg <= 0x17;
  44. }
  45. static bool pcm179x_writeable_reg(struct device *dev, unsigned int reg)
  46. {
  47. bool accessible;
  48. accessible = pcm179x_accessible_reg(dev, reg);
  49. return accessible && reg != 0x16 && reg != 0x17;
  50. }
  51. struct pcm179x_private {
  52. struct regmap *regmap;
  53. unsigned int format;
  54. unsigned int rate;
  55. };
  56. static int pcm179x_set_dai_fmt(struct snd_soc_dai *codec_dai,
  57. unsigned int format)
  58. {
  59. struct snd_soc_component *component = codec_dai->component;
  60. struct pcm179x_private *priv = snd_soc_component_get_drvdata(component);
  61. priv->format = format;
  62. return 0;
  63. }
  64. static int pcm179x_mute(struct snd_soc_dai *dai, int mute, int direction)
  65. {
  66. struct snd_soc_component *component = dai->component;
  67. struct pcm179x_private *priv = snd_soc_component_get_drvdata(component);
  68. int ret;
  69. ret = regmap_update_bits(priv->regmap, PCM179X_SOFT_MUTE,
  70. PCM179X_MUTE_MASK, !!mute);
  71. if (ret < 0)
  72. return ret;
  73. return 0;
  74. }
  75. static int pcm179x_hw_params(struct snd_pcm_substream *substream,
  76. struct snd_pcm_hw_params *params,
  77. struct snd_soc_dai *dai)
  78. {
  79. struct snd_soc_component *component = dai->component;
  80. struct pcm179x_private *priv = snd_soc_component_get_drvdata(component);
  81. int val = 0, ret;
  82. priv->rate = params_rate(params);
  83. switch (priv->format & SND_SOC_DAIFMT_FORMAT_MASK) {
  84. case SND_SOC_DAIFMT_RIGHT_J:
  85. switch (params_width(params)) {
  86. case 24:
  87. case 32:
  88. val = 2;
  89. break;
  90. case 16:
  91. val = 0;
  92. break;
  93. default:
  94. return -EINVAL;
  95. }
  96. break;
  97. case SND_SOC_DAIFMT_I2S:
  98. switch (params_width(params)) {
  99. case 24:
  100. case 32:
  101. val = 5;
  102. break;
  103. case 16:
  104. val = 4;
  105. break;
  106. default:
  107. return -EINVAL;
  108. }
  109. break;
  110. default:
  111. dev_err(component->dev, "Invalid DAI format\n");
  112. return -EINVAL;
  113. }
  114. val = val << PCM179X_FMT_SHIFT | PCM179X_ATLD_ENABLE;
  115. ret = regmap_update_bits(priv->regmap, PCM179X_FMT_CONTROL,
  116. PCM179X_FMT_MASK | PCM179X_ATLD_ENABLE, val);
  117. if (ret < 0)
  118. return ret;
  119. return 0;
  120. }
  121. static const struct snd_soc_dai_ops pcm179x_dai_ops = {
  122. .set_fmt = pcm179x_set_dai_fmt,
  123. .hw_params = pcm179x_hw_params,
  124. .mute_stream = pcm179x_mute,
  125. .no_capture_mute = 1,
  126. };
  127. static const DECLARE_TLV_DB_SCALE(pcm179x_dac_tlv, -12000, 50, 1);
  128. static const struct snd_kcontrol_new pcm179x_controls[] = {
  129. SOC_DOUBLE_R_RANGE_TLV("DAC Playback Volume", PCM179X_DAC_VOL_LEFT,
  130. PCM179X_DAC_VOL_RIGHT, 0, 0xf, 0xff, 0,
  131. pcm179x_dac_tlv),
  132. SOC_SINGLE("DAC Invert Output Switch", PCM179X_MODE_CONTROL, 7, 1, 0),
  133. SOC_SINGLE("DAC Rolloff Filter Switch", PCM179X_MODE_CONTROL, 1, 1, 0),
  134. };
  135. static const struct snd_soc_dapm_widget pcm179x_dapm_widgets[] = {
  136. SND_SOC_DAPM_OUTPUT("IOUTL+"),
  137. SND_SOC_DAPM_OUTPUT("IOUTL-"),
  138. SND_SOC_DAPM_OUTPUT("IOUTR+"),
  139. SND_SOC_DAPM_OUTPUT("IOUTR-"),
  140. };
  141. static const struct snd_soc_dapm_route pcm179x_dapm_routes[] = {
  142. { "IOUTL+", NULL, "Playback" },
  143. { "IOUTL-", NULL, "Playback" },
  144. { "IOUTR+", NULL, "Playback" },
  145. { "IOUTR-", NULL, "Playback" },
  146. };
  147. static struct snd_soc_dai_driver pcm179x_dai = {
  148. .name = "pcm179x-hifi",
  149. .playback = {
  150. .stream_name = "Playback",
  151. .channels_min = 2,
  152. .channels_max = 2,
  153. .rates = SNDRV_PCM_RATE_CONTINUOUS,
  154. .rate_min = 10000,
  155. .rate_max = 200000,
  156. .formats = PCM1792A_FORMATS, },
  157. .ops = &pcm179x_dai_ops,
  158. };
  159. const struct regmap_config pcm179x_regmap_config = {
  160. .reg_bits = 8,
  161. .val_bits = 8,
  162. .max_register = 23,
  163. .reg_defaults = pcm179x_reg_defaults,
  164. .num_reg_defaults = ARRAY_SIZE(pcm179x_reg_defaults),
  165. .writeable_reg = pcm179x_writeable_reg,
  166. .readable_reg = pcm179x_accessible_reg,
  167. };
  168. EXPORT_SYMBOL_GPL(pcm179x_regmap_config);
  169. static const struct snd_soc_component_driver soc_component_dev_pcm179x = {
  170. .controls = pcm179x_controls,
  171. .num_controls = ARRAY_SIZE(pcm179x_controls),
  172. .dapm_widgets = pcm179x_dapm_widgets,
  173. .num_dapm_widgets = ARRAY_SIZE(pcm179x_dapm_widgets),
  174. .dapm_routes = pcm179x_dapm_routes,
  175. .num_dapm_routes = ARRAY_SIZE(pcm179x_dapm_routes),
  176. .idle_bias_on = 1,
  177. .use_pmdown_time = 1,
  178. .endianness = 1,
  179. .non_legacy_dai_naming = 1,
  180. };
  181. int pcm179x_common_init(struct device *dev, struct regmap *regmap)
  182. {
  183. struct pcm179x_private *pcm179x;
  184. pcm179x = devm_kzalloc(dev, sizeof(struct pcm179x_private),
  185. GFP_KERNEL);
  186. if (!pcm179x)
  187. return -ENOMEM;
  188. pcm179x->regmap = regmap;
  189. dev_set_drvdata(dev, pcm179x);
  190. return devm_snd_soc_register_component(dev,
  191. &soc_component_dev_pcm179x, &pcm179x_dai, 1);
  192. }
  193. EXPORT_SYMBOL_GPL(pcm179x_common_init);
  194. MODULE_DESCRIPTION("ASoC PCM179X driver");
  195. MODULE_AUTHOR("Michael Trimarchi <michael@amarulasolutions.com>");
  196. MODULE_LICENSE("GPL");