lm4857.c 3.7 KB

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  1. // SPDX-License-Identifier: GPL-2.0-or-later
  2. /*
  3. * LM4857 AMP driver
  4. *
  5. * Copyright 2007 Wolfson Microelectronics PLC.
  6. * Author: Graeme Gregory
  7. * graeme.gregory@wolfsonmicro.com
  8. * Copyright 2011 Lars-Peter Clausen <lars@metafoo.de>
  9. */
  10. #include <linux/init.h>
  11. #include <linux/module.h>
  12. #include <linux/i2c.h>
  13. #include <linux/regmap.h>
  14. #include <linux/slab.h>
  15. #include <sound/core.h>
  16. #include <sound/soc.h>
  17. #include <sound/tlv.h>
  18. static const struct reg_default lm4857_default_regs[] = {
  19. { 0x0, 0x00 },
  20. { 0x1, 0x00 },
  21. { 0x2, 0x00 },
  22. { 0x3, 0x00 },
  23. };
  24. /* The register offsets in the cache array */
  25. #define LM4857_MVOL 0
  26. #define LM4857_LVOL 1
  27. #define LM4857_RVOL 2
  28. #define LM4857_CTRL 3
  29. /* the shifts required to set these bits */
  30. #define LM4857_3D 5
  31. #define LM4857_WAKEUP 5
  32. #define LM4857_EPGAIN 4
  33. static const unsigned int lm4857_mode_values[] = {
  34. 0,
  35. 6,
  36. 7,
  37. 8,
  38. 9,
  39. };
  40. static const char * const lm4857_mode_texts[] = {
  41. "Off",
  42. "Earpiece",
  43. "Loudspeaker",
  44. "Loudspeaker + Headphone",
  45. "Headphone",
  46. };
  47. static SOC_VALUE_ENUM_SINGLE_AUTODISABLE_DECL(lm4857_mode_enum,
  48. LM4857_CTRL, 0, 0xf, lm4857_mode_texts, lm4857_mode_values);
  49. static const struct snd_kcontrol_new lm4857_mode_ctrl =
  50. SOC_DAPM_ENUM("Mode", lm4857_mode_enum);
  51. static const struct snd_soc_dapm_widget lm4857_dapm_widgets[] = {
  52. SND_SOC_DAPM_INPUT("IN"),
  53. SND_SOC_DAPM_DEMUX("Mode", SND_SOC_NOPM, 0, 0, &lm4857_mode_ctrl),
  54. SND_SOC_DAPM_OUTPUT("LS"),
  55. SND_SOC_DAPM_OUTPUT("HP"),
  56. SND_SOC_DAPM_OUTPUT("EP"),
  57. };
  58. static const DECLARE_TLV_DB_SCALE(stereo_tlv, -4050, 150, 0);
  59. static const DECLARE_TLV_DB_SCALE(mono_tlv, -3450, 150, 0);
  60. static const struct snd_kcontrol_new lm4857_controls[] = {
  61. SOC_SINGLE_TLV("Left Playback Volume", LM4857_LVOL, 0, 31, 0,
  62. stereo_tlv),
  63. SOC_SINGLE_TLV("Right Playback Volume", LM4857_RVOL, 0, 31, 0,
  64. stereo_tlv),
  65. SOC_SINGLE_TLV("Mono Playback Volume", LM4857_MVOL, 0, 31, 0,
  66. mono_tlv),
  67. SOC_SINGLE("Spk 3D Playback Switch", LM4857_LVOL, LM4857_3D, 1, 0),
  68. SOC_SINGLE("HP 3D Playback Switch", LM4857_RVOL, LM4857_3D, 1, 0),
  69. SOC_SINGLE("Fast Wakeup Playback Switch", LM4857_CTRL,
  70. LM4857_WAKEUP, 1, 0),
  71. SOC_SINGLE("Earpiece 6dB Playback Switch", LM4857_CTRL,
  72. LM4857_EPGAIN, 1, 0),
  73. };
  74. static const struct snd_soc_dapm_route lm4857_routes[] = {
  75. { "Mode", NULL, "IN" },
  76. { "LS", "Loudspeaker", "Mode" },
  77. { "LS", "Loudspeaker + Headphone", "Mode" },
  78. { "HP", "Headphone", "Mode" },
  79. { "HP", "Loudspeaker + Headphone", "Mode" },
  80. { "EP", "Earpiece", "Mode" },
  81. };
  82. static const struct snd_soc_component_driver lm4857_component_driver = {
  83. .controls = lm4857_controls,
  84. .num_controls = ARRAY_SIZE(lm4857_controls),
  85. .dapm_widgets = lm4857_dapm_widgets,
  86. .num_dapm_widgets = ARRAY_SIZE(lm4857_dapm_widgets),
  87. .dapm_routes = lm4857_routes,
  88. .num_dapm_routes = ARRAY_SIZE(lm4857_routes),
  89. };
  90. static const struct regmap_config lm4857_regmap_config = {
  91. .val_bits = 6,
  92. .reg_bits = 2,
  93. .max_register = LM4857_CTRL,
  94. .cache_type = REGCACHE_FLAT,
  95. .reg_defaults = lm4857_default_regs,
  96. .num_reg_defaults = ARRAY_SIZE(lm4857_default_regs),
  97. };
  98. static int lm4857_i2c_probe(struct i2c_client *i2c,
  99. const struct i2c_device_id *id)
  100. {
  101. struct regmap *regmap;
  102. regmap = devm_regmap_init_i2c(i2c, &lm4857_regmap_config);
  103. if (IS_ERR(regmap))
  104. return PTR_ERR(regmap);
  105. return devm_snd_soc_register_component(&i2c->dev,
  106. &lm4857_component_driver, NULL, 0);
  107. }
  108. static const struct i2c_device_id lm4857_i2c_id[] = {
  109. { "lm4857", 0 },
  110. { }
  111. };
  112. MODULE_DEVICE_TABLE(i2c, lm4857_i2c_id);
  113. static struct i2c_driver lm4857_i2c_driver = {
  114. .driver = {
  115. .name = "lm4857",
  116. },
  117. .probe = lm4857_i2c_probe,
  118. .id_table = lm4857_i2c_id,
  119. };
  120. module_i2c_driver(lm4857_i2c_driver);
  121. MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
  122. MODULE_DESCRIPTION("LM4857 amplifier driver");
  123. MODULE_LICENSE("GPL");