14bb3f43cSMark Brown /* 24bb3f43cSMark Brown * Driver for the 1250-EV1 audio I/O module 34bb3f43cSMark Brown * 44bb3f43cSMark Brown * Copyright 2011 Wolfson Microelectronics plc 54bb3f43cSMark Brown * 64bb3f43cSMark Brown * This program is free software; you can redistribute it and/or modify it 74bb3f43cSMark Brown * under the terms of the GNU General Public License as published by the 84bb3f43cSMark Brown * Free Software Foundation; either version 2 of the License, or (at your 94bb3f43cSMark Brown * option) any later version. 104bb3f43cSMark Brown * 114bb3f43cSMark Brown */ 124bb3f43cSMark Brown 134bb3f43cSMark Brown #include <linux/init.h> 144bb3f43cSMark Brown #include <linux/module.h> 15213eb0fbSMark Brown #include <linux/slab.h> 164bb3f43cSMark Brown #include <linux/i2c.h> 17213eb0fbSMark Brown #include <linux/gpio.h> 184bb3f43cSMark Brown 194bb3f43cSMark Brown #include <sound/soc.h> 204bb3f43cSMark Brown #include <sound/soc-dapm.h> 21213eb0fbSMark Brown #include <sound/wm1250-ev1.h> 22213eb0fbSMark Brown 23213eb0fbSMark Brown static const char *wm1250_gpio_names[WM1250_EV1_NUM_GPIOS] = { 24213eb0fbSMark Brown "WM1250 CLK_ENA", 25213eb0fbSMark Brown "WM1250 CLK_SEL0", 26213eb0fbSMark Brown "WM1250 CLK_SEL1", 27213eb0fbSMark Brown "WM1250 OSR", 28213eb0fbSMark Brown "WM1250 MASTER", 29213eb0fbSMark Brown }; 30213eb0fbSMark Brown 31213eb0fbSMark Brown struct wm1250_priv { 32213eb0fbSMark Brown struct gpio gpios[WM1250_EV1_NUM_GPIOS]; 33213eb0fbSMark Brown }; 34213eb0fbSMark Brown 35213eb0fbSMark Brown static int wm1250_ev1_set_bias_level(struct snd_soc_codec *codec, 36213eb0fbSMark Brown enum snd_soc_bias_level level) 37213eb0fbSMark Brown { 38213eb0fbSMark Brown struct wm1250_priv *wm1250 = dev_get_drvdata(codec->dev); 39213eb0fbSMark Brown int ena; 40213eb0fbSMark Brown 41213eb0fbSMark Brown if (wm1250) 42213eb0fbSMark Brown ena = wm1250->gpios[WM1250_EV1_GPIO_CLK_ENA].gpio; 43213eb0fbSMark Brown else 44213eb0fbSMark Brown ena = -1; 45213eb0fbSMark Brown 46213eb0fbSMark Brown switch (level) { 47213eb0fbSMark Brown case SND_SOC_BIAS_ON: 48213eb0fbSMark Brown break; 49213eb0fbSMark Brown 50213eb0fbSMark Brown case SND_SOC_BIAS_PREPARE: 51213eb0fbSMark Brown break; 52213eb0fbSMark Brown 53213eb0fbSMark Brown case SND_SOC_BIAS_STANDBY: 54213eb0fbSMark Brown if (ena >= 0) 55213eb0fbSMark Brown gpio_set_value_cansleep(ena, 1); 56213eb0fbSMark Brown break; 57213eb0fbSMark Brown 58213eb0fbSMark Brown case SND_SOC_BIAS_OFF: 59213eb0fbSMark Brown if (ena >= 0) 60213eb0fbSMark Brown gpio_set_value_cansleep(ena, 0); 61213eb0fbSMark Brown break; 62213eb0fbSMark Brown } 63213eb0fbSMark Brown 64213eb0fbSMark Brown codec->dapm.bias_level = level; 65213eb0fbSMark Brown 66213eb0fbSMark Brown return 0; 67213eb0fbSMark Brown } 684bb3f43cSMark Brown 694bb3f43cSMark Brown static const struct snd_soc_dapm_widget wm1250_ev1_dapm_widgets[] = { 704bb3f43cSMark Brown SND_SOC_DAPM_ADC("ADC", "wm1250-ev1 Capture", SND_SOC_NOPM, 0, 0), 714bb3f43cSMark Brown SND_SOC_DAPM_DAC("DAC", "wm1250-ev1 Playback", SND_SOC_NOPM, 0, 0), 724bb3f43cSMark Brown 734bb3f43cSMark Brown SND_SOC_DAPM_INPUT("WM1250 Input"), 74979f4869SAxel Lin SND_SOC_DAPM_OUTPUT("WM1250 Output"), 754bb3f43cSMark Brown }; 764bb3f43cSMark Brown 774bb3f43cSMark Brown static const struct snd_soc_dapm_route wm1250_ev1_dapm_routes[] = { 784bb3f43cSMark Brown { "ADC", NULL, "WM1250 Input" }, 794bb3f43cSMark Brown { "WM1250 Output", NULL, "DAC" }, 804bb3f43cSMark Brown }; 814bb3f43cSMark Brown 824bb3f43cSMark Brown static struct snd_soc_dai_driver wm1250_ev1_dai = { 834bb3f43cSMark Brown .name = "wm1250-ev1", 844bb3f43cSMark Brown .playback = { 854bb3f43cSMark Brown .stream_name = "Playback", 864bb3f43cSMark Brown .channels_min = 1, 874bb3f43cSMark Brown .channels_max = 1, 884bb3f43cSMark Brown .rates = SNDRV_PCM_RATE_8000, 894bb3f43cSMark Brown .formats = SNDRV_PCM_FMTBIT_S16_LE, 904bb3f43cSMark Brown }, 914bb3f43cSMark Brown .capture = { 924bb3f43cSMark Brown .stream_name = "Capture", 934bb3f43cSMark Brown .channels_min = 1, 944bb3f43cSMark Brown .channels_max = 1, 954bb3f43cSMark Brown .rates = SNDRV_PCM_RATE_8000, 964bb3f43cSMark Brown .formats = SNDRV_PCM_FMTBIT_S16_LE, 974bb3f43cSMark Brown }, 984bb3f43cSMark Brown }; 994bb3f43cSMark Brown 1004bb3f43cSMark Brown static struct snd_soc_codec_driver soc_codec_dev_wm1250_ev1 = { 1014bb3f43cSMark Brown .dapm_widgets = wm1250_ev1_dapm_widgets, 1024bb3f43cSMark Brown .num_dapm_widgets = ARRAY_SIZE(wm1250_ev1_dapm_widgets), 1034bb3f43cSMark Brown .dapm_routes = wm1250_ev1_dapm_routes, 1044bb3f43cSMark Brown .num_dapm_routes = ARRAY_SIZE(wm1250_ev1_dapm_routes), 105213eb0fbSMark Brown 106213eb0fbSMark Brown .set_bias_level = wm1250_ev1_set_bias_level, 107a850260eSMark Brown .idle_bias_off = true, 1084bb3f43cSMark Brown }; 1094bb3f43cSMark Brown 110213eb0fbSMark Brown static int __devinit wm1250_ev1_pdata(struct i2c_client *i2c) 111213eb0fbSMark Brown { 112213eb0fbSMark Brown struct wm1250_ev1_pdata *pdata = dev_get_platdata(&i2c->dev); 113213eb0fbSMark Brown struct wm1250_priv *wm1250; 114213eb0fbSMark Brown int i, ret; 115213eb0fbSMark Brown 116213eb0fbSMark Brown if (!pdata) 117213eb0fbSMark Brown return 0; 118213eb0fbSMark Brown 119*5fe803f5SMark Brown wm1250 = devm_kzalloc(&i2c->dev, sizeof(*wm1250), GFP_KERNEL); 120213eb0fbSMark Brown if (!wm1250) { 121213eb0fbSMark Brown dev_err(&i2c->dev, "Unable to allocate private data\n"); 122213eb0fbSMark Brown ret = -ENOMEM; 123213eb0fbSMark Brown goto err; 124213eb0fbSMark Brown } 125213eb0fbSMark Brown 126213eb0fbSMark Brown for (i = 0; i < ARRAY_SIZE(wm1250->gpios); i++) { 127213eb0fbSMark Brown wm1250->gpios[i].gpio = pdata->gpios[i]; 128213eb0fbSMark Brown wm1250->gpios[i].label = wm1250_gpio_names[i]; 129213eb0fbSMark Brown wm1250->gpios[i].flags = GPIOF_OUT_INIT_LOW; 130213eb0fbSMark Brown } 131213eb0fbSMark Brown wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL0].flags = GPIOF_OUT_INIT_HIGH; 132213eb0fbSMark Brown wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL1].flags = GPIOF_OUT_INIT_HIGH; 133213eb0fbSMark Brown 134213eb0fbSMark Brown ret = gpio_request_array(wm1250->gpios, ARRAY_SIZE(wm1250->gpios)); 135213eb0fbSMark Brown if (ret != 0) { 136213eb0fbSMark Brown dev_err(&i2c->dev, "Failed to get GPIOs: %d\n", ret); 137*5fe803f5SMark Brown goto err; 138213eb0fbSMark Brown } 139213eb0fbSMark Brown 140213eb0fbSMark Brown dev_set_drvdata(&i2c->dev, wm1250); 141213eb0fbSMark Brown 142213eb0fbSMark Brown return ret; 143213eb0fbSMark Brown 144213eb0fbSMark Brown err: 145213eb0fbSMark Brown return ret; 146213eb0fbSMark Brown } 147213eb0fbSMark Brown 148213eb0fbSMark Brown static void wm1250_ev1_free(struct i2c_client *i2c) 149213eb0fbSMark Brown { 150213eb0fbSMark Brown struct wm1250_priv *wm1250 = dev_get_drvdata(&i2c->dev); 151213eb0fbSMark Brown 152*5fe803f5SMark Brown if (wm1250) 153213eb0fbSMark Brown gpio_free_array(wm1250->gpios, ARRAY_SIZE(wm1250->gpios)); 154213eb0fbSMark Brown } 155213eb0fbSMark Brown 1564bb3f43cSMark Brown static int __devinit wm1250_ev1_probe(struct i2c_client *i2c, 157eaefb38fSMark Brown const struct i2c_device_id *i2c_id) 1584bb3f43cSMark Brown { 159213eb0fbSMark Brown int id, board, rev, ret; 160213eb0fbSMark Brown 161213eb0fbSMark Brown dev_set_drvdata(&i2c->dev, NULL); 162eaefb38fSMark Brown 163eaefb38fSMark Brown board = i2c_smbus_read_byte_data(i2c, 0); 164eaefb38fSMark Brown if (board < 0) { 165c38071c0SMark Brown dev_err(&i2c->dev, "Failed to read ID: %d\n", board); 166c38071c0SMark Brown return board; 167eaefb38fSMark Brown } 168eaefb38fSMark Brown 169eaefb38fSMark Brown id = (board & 0xfe) >> 2; 170eaefb38fSMark Brown rev = board & 0x3; 171eaefb38fSMark Brown 172eaefb38fSMark Brown if (id != 1) { 173eaefb38fSMark Brown dev_err(&i2c->dev, "Unknown board ID %d\n", id); 174eaefb38fSMark Brown return -ENODEV; 175eaefb38fSMark Brown } 176eaefb38fSMark Brown 1775c58b739SMark Brown dev_info(&i2c->dev, "revision %d\n", rev + 1); 178eaefb38fSMark Brown 179213eb0fbSMark Brown ret = wm1250_ev1_pdata(i2c); 180213eb0fbSMark Brown if (ret != 0) 181213eb0fbSMark Brown return ret; 182213eb0fbSMark Brown 183213eb0fbSMark Brown ret = snd_soc_register_codec(&i2c->dev, &soc_codec_dev_wm1250_ev1, 1844bb3f43cSMark Brown &wm1250_ev1_dai, 1); 185213eb0fbSMark Brown if (ret != 0) { 186213eb0fbSMark Brown dev_err(&i2c->dev, "Failed to register CODEC: %d\n", ret); 187213eb0fbSMark Brown wm1250_ev1_free(i2c); 188213eb0fbSMark Brown return ret; 189213eb0fbSMark Brown } 190213eb0fbSMark Brown 191213eb0fbSMark Brown return 0; 1924bb3f43cSMark Brown } 1934bb3f43cSMark Brown 1944bb3f43cSMark Brown static int __devexit wm1250_ev1_remove(struct i2c_client *i2c) 1954bb3f43cSMark Brown { 1964bb3f43cSMark Brown snd_soc_unregister_codec(&i2c->dev); 197213eb0fbSMark Brown wm1250_ev1_free(i2c); 1984bb3f43cSMark Brown 1994bb3f43cSMark Brown return 0; 2004bb3f43cSMark Brown } 2014bb3f43cSMark Brown 2024bb3f43cSMark Brown static const struct i2c_device_id wm1250_ev1_i2c_id[] = { 2034bb3f43cSMark Brown { "wm1250-ev1", 0 }, 2044bb3f43cSMark Brown { } 2054bb3f43cSMark Brown }; 206420dd718SMark Brown MODULE_DEVICE_TABLE(i2c, wm1250_ev1_i2c_id); 2074bb3f43cSMark Brown 2084bb3f43cSMark Brown static struct i2c_driver wm1250_ev1_i2c_driver = { 2094bb3f43cSMark Brown .driver = { 2104bb3f43cSMark Brown .name = "wm1250-ev1", 2114bb3f43cSMark Brown .owner = THIS_MODULE, 2124bb3f43cSMark Brown }, 2134bb3f43cSMark Brown .probe = wm1250_ev1_probe, 2144bb3f43cSMark Brown .remove = __devexit_p(wm1250_ev1_remove), 2154bb3f43cSMark Brown .id_table = wm1250_ev1_i2c_id, 2164bb3f43cSMark Brown }; 2174bb3f43cSMark Brown 2184bb3f43cSMark Brown static int __init wm1250_ev1_modinit(void) 2194bb3f43cSMark Brown { 2204bb3f43cSMark Brown int ret = 0; 2214bb3f43cSMark Brown 2224bb3f43cSMark Brown ret = i2c_add_driver(&wm1250_ev1_i2c_driver); 2234bb3f43cSMark Brown if (ret != 0) 2244bb3f43cSMark Brown pr_err("Failed to register WM1250-EV1 I2C driver: %d\n", ret); 2254bb3f43cSMark Brown 2264bb3f43cSMark Brown return ret; 2274bb3f43cSMark Brown } 2284bb3f43cSMark Brown module_init(wm1250_ev1_modinit); 2294bb3f43cSMark Brown 2304bb3f43cSMark Brown static void __exit wm1250_ev1_exit(void) 2314bb3f43cSMark Brown { 2324bb3f43cSMark Brown i2c_del_driver(&wm1250_ev1_i2c_driver); 2334bb3f43cSMark Brown } 2344bb3f43cSMark Brown module_exit(wm1250_ev1_exit); 2354bb3f43cSMark Brown 2364bb3f43cSMark Brown MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); 2374bb3f43cSMark Brown MODULE_DESCRIPTION("WM1250-EV1 audio I/O module driver"); 2384bb3f43cSMark Brown MODULE_LICENSE("GPL"); 239