projects / deliverable / linux.git / blame
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|---|---|---|
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1 | /* |
| 2 | * Driver for the 1250-EV1 audio I/O module | |
| 3 | * | |
| 4 | * Copyright 2011 Wolfson Microelectronics plc | |
| 5 | * | |
| 6 | * This program is free software; you can redistribute it and/or modify it | |
| 7 | * under the terms of the GNU General Public License as published by the | |
| 8 | * Free Software Foundation; either version 2 of the License, or (at your | |
| 9 | * option) any later version. | |
| 10 | * | |
| 11 | */ | |
| 12 | ||
| 13 | #include <linux/init.h> | |
| 14 | #include <linux/module.h> | |
| 15 | #include <linux/i2c.h> | |
| 16 | ||
| 17 | #include <sound/soc.h> | |
| 18 | #include <sound/soc-dapm.h> | |
| 19 | ||
| 20 | static const struct snd_soc_dapm_widget wm1250_ev1_dapm_widgets[] = { | |
| 21 | SND_SOC_DAPM_ADC("ADC", "wm1250-ev1 Capture", SND_SOC_NOPM, 0, 0), | |
| 22 | SND_SOC_DAPM_DAC("DAC", "wm1250-ev1 Playback", SND_SOC_NOPM, 0, 0), | |
| 23 | ||
| 24 | SND_SOC_DAPM_INPUT("WM1250 Input"), | |
| 979f4869 | 25 | SND_SOC_DAPM_OUTPUT("WM1250 Output"), |
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26 | }; |
| 27 | ||
| 28 | static const struct snd_soc_dapm_route wm1250_ev1_dapm_routes[] = { | |
| 29 | { "ADC", NULL, "WM1250 Input" }, | |
| 30 | { "WM1250 Output", NULL, "DAC" }, | |
| 31 | }; | |
| 32 | ||
| 33 | static struct snd_soc_dai_driver wm1250_ev1_dai = { | |
| 34 | .name = "wm1250-ev1", | |
| 35 | .playback = { | |
| 36 | .stream_name = "Playback", | |
| 37 | .channels_min = 1, | |
| 38 | .channels_max = 1, | |
| 39 | .rates = SNDRV_PCM_RATE_8000, | |
| 40 | .formats = SNDRV_PCM_FMTBIT_S16_LE, | |
| 41 | }, | |
| 42 | .capture = { | |
| 43 | .stream_name = "Capture", | |
| 44 | .channels_min = 1, | |
| 45 | .channels_max = 1, | |
| 46 | .rates = SNDRV_PCM_RATE_8000, | |
| 47 | .formats = SNDRV_PCM_FMTBIT_S16_LE, | |
| 48 | }, | |
| 49 | }; | |
| 50 | ||
| 51 | static struct snd_soc_codec_driver soc_codec_dev_wm1250_ev1 = { | |
| 52 | .dapm_widgets = wm1250_ev1_dapm_widgets, | |
| 53 | .num_dapm_widgets = ARRAY_SIZE(wm1250_ev1_dapm_widgets), | |
| 54 | .dapm_routes = wm1250_ev1_dapm_routes, | |
| 55 | .num_dapm_routes = ARRAY_SIZE(wm1250_ev1_dapm_routes), | |
| 56 | }; | |
| 57 | ||
| 58 | static int __devinit wm1250_ev1_probe(struct i2c_client *i2c, | |
| 59 | const struct i2c_device_id *id) | |
| 60 | { | |
| 61 | return snd_soc_register_codec(&i2c->dev, &soc_codec_dev_wm1250_ev1, | |
| 62 | &wm1250_ev1_dai, 1); | |
| 63 | } | |
| 64 | ||
| 65 | static int __devexit wm1250_ev1_remove(struct i2c_client *i2c) | |
| 66 | { | |
| 67 | snd_soc_unregister_codec(&i2c->dev); | |
| 68 | ||
| 69 | return 0; | |
| 70 | } | |
| 71 | ||
| 72 | static const struct i2c_device_id wm1250_ev1_i2c_id[] = { | |
| 73 | { "wm1250-ev1", 0 }, | |
| 74 | { } | |
| 75 | }; | |
| 420dd718 | 76 | MODULE_DEVICE_TABLE(i2c, wm1250_ev1_i2c_id); |
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77 | |
| 78 | static struct i2c_driver wm1250_ev1_i2c_driver = { | |
| 79 | .driver = { | |
| 80 | .name = "wm1250-ev1", | |
| 81 | .owner = THIS_MODULE, | |
| 82 | }, | |
| 83 | .probe = wm1250_ev1_probe, | |
| 84 | .remove = __devexit_p(wm1250_ev1_remove), | |
| 85 | .id_table = wm1250_ev1_i2c_id, | |
| 86 | }; | |
| 87 | ||
| 88 | static int __init wm1250_ev1_modinit(void) | |
| 89 | { | |
| 90 | int ret = 0; | |
| 91 | ||
| 92 | ret = i2c_add_driver(&wm1250_ev1_i2c_driver); | |
| 93 | if (ret != 0) | |
| 94 | pr_err("Failed to register WM1250-EV1 I2C driver: %d\n", ret); | |
| 95 | ||
| 96 | return ret; | |
| 97 | } | |
| 98 | module_init(wm1250_ev1_modinit); | |
| 99 | ||
| 100 | static void __exit wm1250_ev1_exit(void) | |
| 101 | { | |
| 102 | i2c_del_driver(&wm1250_ev1_i2c_driver); | |
| 103 | } | |
| 104 | module_exit(wm1250_ev1_exit); | |
| 105 | ||
| 106 | MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); | |
| 107 | MODULE_DESCRIPTION("WM1250-EV1 audio I/O module driver"); | |
| 108 | MODULE_LICENSE("GPL"); |