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 82fde39a6bSMark Brown static int wm1250_ev1_hw_params(struct snd_pcm_substream *substream, 83fde39a6bSMark Brown struct snd_pcm_hw_params *params, 84fde39a6bSMark Brown struct snd_soc_dai *dai) 85fde39a6bSMark Brown { 86fde39a6bSMark Brown struct wm1250_priv *wm1250 = snd_soc_codec_get_drvdata(dai->codec); 87fde39a6bSMark Brown 88fde39a6bSMark Brown switch (params_rate(params)) { 89fde39a6bSMark Brown case 8000: 90fde39a6bSMark Brown gpio_set_value(wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL0].gpio, 91fde39a6bSMark Brown 1); 92fde39a6bSMark Brown gpio_set_value(wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL1].gpio, 93fde39a6bSMark Brown 1); 94fde39a6bSMark Brown break; 95fde39a6bSMark Brown case 16000: 96fde39a6bSMark Brown gpio_set_value(wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL0].gpio, 97fde39a6bSMark Brown 0); 98fde39a6bSMark Brown gpio_set_value(wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL1].gpio, 99fde39a6bSMark Brown 1); 100fde39a6bSMark Brown break; 101fde39a6bSMark Brown case 32000: 102fde39a6bSMark Brown gpio_set_value(wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL0].gpio, 103fde39a6bSMark Brown 1); 104fde39a6bSMark Brown gpio_set_value(wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL1].gpio, 105fde39a6bSMark Brown 0); 106fde39a6bSMark Brown break; 107fde39a6bSMark Brown case 64000: 108fde39a6bSMark Brown gpio_set_value(wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL0].gpio, 109fde39a6bSMark Brown 0); 110fde39a6bSMark Brown gpio_set_value(wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL1].gpio, 111fde39a6bSMark Brown 0); 112fde39a6bSMark Brown break; 113fde39a6bSMark Brown default: 114fde39a6bSMark Brown return -EINVAL; 115fde39a6bSMark Brown } 116fde39a6bSMark Brown 117fde39a6bSMark Brown return 0; 118fde39a6bSMark Brown } 119fde39a6bSMark Brown 120fde39a6bSMark Brown static const struct snd_soc_dai_ops wm1250_ev1_ops = { 121fde39a6bSMark Brown .hw_params = wm1250_ev1_hw_params, 122fde39a6bSMark Brown }; 123fde39a6bSMark Brown 124bcbf4a69SMark Brown #define WM1250_EV1_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000 |\ 125bcbf4a69SMark Brown SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_64000) 126bcbf4a69SMark Brown 1274bb3f43cSMark Brown static struct snd_soc_dai_driver wm1250_ev1_dai = { 1284bb3f43cSMark Brown .name = "wm1250-ev1", 1294bb3f43cSMark Brown .playback = { 1304bb3f43cSMark Brown .stream_name = "Playback", 1314bb3f43cSMark Brown .channels_min = 1, 1325f6ac59fSMark Brown .channels_max = 2, 133bcbf4a69SMark Brown .rates = WM1250_EV1_RATES, 1344bb3f43cSMark Brown .formats = SNDRV_PCM_FMTBIT_S16_LE, 1354bb3f43cSMark Brown }, 1364bb3f43cSMark Brown .capture = { 1374bb3f43cSMark Brown .stream_name = "Capture", 1384bb3f43cSMark Brown .channels_min = 1, 1395f6ac59fSMark Brown .channels_max = 2, 140bcbf4a69SMark Brown .rates = WM1250_EV1_RATES, 1414bb3f43cSMark Brown .formats = SNDRV_PCM_FMTBIT_S16_LE, 1424bb3f43cSMark Brown }, 143fde39a6bSMark Brown .ops = &wm1250_ev1_ops, 1444bb3f43cSMark Brown }; 1454bb3f43cSMark Brown 1464bb3f43cSMark Brown static struct snd_soc_codec_driver soc_codec_dev_wm1250_ev1 = { 1474bb3f43cSMark Brown .dapm_widgets = wm1250_ev1_dapm_widgets, 1484bb3f43cSMark Brown .num_dapm_widgets = ARRAY_SIZE(wm1250_ev1_dapm_widgets), 1494bb3f43cSMark Brown .dapm_routes = wm1250_ev1_dapm_routes, 1504bb3f43cSMark Brown .num_dapm_routes = ARRAY_SIZE(wm1250_ev1_dapm_routes), 151213eb0fbSMark Brown 152213eb0fbSMark Brown .set_bias_level = wm1250_ev1_set_bias_level, 153a850260eSMark Brown .idle_bias_off = true, 1544bb3f43cSMark Brown }; 1554bb3f43cSMark Brown 156*7a79e94eSBill Pemberton static int wm1250_ev1_pdata(struct i2c_client *i2c) 157213eb0fbSMark Brown { 158213eb0fbSMark Brown struct wm1250_ev1_pdata *pdata = dev_get_platdata(&i2c->dev); 159213eb0fbSMark Brown struct wm1250_priv *wm1250; 160213eb0fbSMark Brown int i, ret; 161213eb0fbSMark Brown 162213eb0fbSMark Brown if (!pdata) 163213eb0fbSMark Brown return 0; 164213eb0fbSMark Brown 1655fe803f5SMark Brown wm1250 = devm_kzalloc(&i2c->dev, sizeof(*wm1250), GFP_KERNEL); 166213eb0fbSMark Brown if (!wm1250) { 167213eb0fbSMark Brown dev_err(&i2c->dev, "Unable to allocate private data\n"); 168213eb0fbSMark Brown ret = -ENOMEM; 169213eb0fbSMark Brown goto err; 170213eb0fbSMark Brown } 171213eb0fbSMark Brown 172213eb0fbSMark Brown for (i = 0; i < ARRAY_SIZE(wm1250->gpios); i++) { 173213eb0fbSMark Brown wm1250->gpios[i].gpio = pdata->gpios[i]; 174213eb0fbSMark Brown wm1250->gpios[i].label = wm1250_gpio_names[i]; 175213eb0fbSMark Brown wm1250->gpios[i].flags = GPIOF_OUT_INIT_LOW; 176213eb0fbSMark Brown } 177213eb0fbSMark Brown wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL0].flags = GPIOF_OUT_INIT_HIGH; 178213eb0fbSMark Brown wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL1].flags = GPIOF_OUT_INIT_HIGH; 179213eb0fbSMark Brown 180213eb0fbSMark Brown ret = gpio_request_array(wm1250->gpios, ARRAY_SIZE(wm1250->gpios)); 181213eb0fbSMark Brown if (ret != 0) { 182213eb0fbSMark Brown dev_err(&i2c->dev, "Failed to get GPIOs: %d\n", ret); 1835fe803f5SMark Brown goto err; 184213eb0fbSMark Brown } 185213eb0fbSMark Brown 186213eb0fbSMark Brown dev_set_drvdata(&i2c->dev, wm1250); 187213eb0fbSMark Brown 188213eb0fbSMark Brown return ret; 189213eb0fbSMark Brown 190213eb0fbSMark Brown err: 191213eb0fbSMark Brown return ret; 192213eb0fbSMark Brown } 193213eb0fbSMark Brown 194213eb0fbSMark Brown static void wm1250_ev1_free(struct i2c_client *i2c) 195213eb0fbSMark Brown { 196213eb0fbSMark Brown struct wm1250_priv *wm1250 = dev_get_drvdata(&i2c->dev); 197213eb0fbSMark Brown 1985fe803f5SMark Brown if (wm1250) 199213eb0fbSMark Brown gpio_free_array(wm1250->gpios, ARRAY_SIZE(wm1250->gpios)); 200213eb0fbSMark Brown } 201213eb0fbSMark Brown 202*7a79e94eSBill Pemberton static int wm1250_ev1_probe(struct i2c_client *i2c, 203eaefb38fSMark Brown const struct i2c_device_id *i2c_id) 2044bb3f43cSMark Brown { 205213eb0fbSMark Brown int id, board, rev, ret; 206213eb0fbSMark Brown 207213eb0fbSMark Brown dev_set_drvdata(&i2c->dev, NULL); 208eaefb38fSMark Brown 209eaefb38fSMark Brown board = i2c_smbus_read_byte_data(i2c, 0); 210eaefb38fSMark Brown if (board < 0) { 211c38071c0SMark Brown dev_err(&i2c->dev, "Failed to read ID: %d\n", board); 212c38071c0SMark Brown return board; 213eaefb38fSMark Brown } 214eaefb38fSMark Brown 215eaefb38fSMark Brown id = (board & 0xfe) >> 2; 216eaefb38fSMark Brown rev = board & 0x3; 217eaefb38fSMark Brown 218eaefb38fSMark Brown if (id != 1) { 219eaefb38fSMark Brown dev_err(&i2c->dev, "Unknown board ID %d\n", id); 220eaefb38fSMark Brown return -ENODEV; 221eaefb38fSMark Brown } 222eaefb38fSMark Brown 2235c58b739SMark Brown dev_info(&i2c->dev, "revision %d\n", rev + 1); 224eaefb38fSMark Brown 225213eb0fbSMark Brown ret = wm1250_ev1_pdata(i2c); 226213eb0fbSMark Brown if (ret != 0) 227213eb0fbSMark Brown return ret; 228213eb0fbSMark Brown 229213eb0fbSMark Brown ret = snd_soc_register_codec(&i2c->dev, &soc_codec_dev_wm1250_ev1, 2304bb3f43cSMark Brown &wm1250_ev1_dai, 1); 231213eb0fbSMark Brown if (ret != 0) { 232213eb0fbSMark Brown dev_err(&i2c->dev, "Failed to register CODEC: %d\n", ret); 233213eb0fbSMark Brown wm1250_ev1_free(i2c); 234213eb0fbSMark Brown return ret; 235213eb0fbSMark Brown } 236213eb0fbSMark Brown 237213eb0fbSMark Brown return 0; 2384bb3f43cSMark Brown } 2394bb3f43cSMark Brown 240*7a79e94eSBill Pemberton static int wm1250_ev1_remove(struct i2c_client *i2c) 2414bb3f43cSMark Brown { 2424bb3f43cSMark Brown snd_soc_unregister_codec(&i2c->dev); 243213eb0fbSMark Brown wm1250_ev1_free(i2c); 2444bb3f43cSMark Brown 2454bb3f43cSMark Brown return 0; 2464bb3f43cSMark Brown } 2474bb3f43cSMark Brown 2484bb3f43cSMark Brown static const struct i2c_device_id wm1250_ev1_i2c_id[] = { 2494bb3f43cSMark Brown { "wm1250-ev1", 0 }, 2504bb3f43cSMark Brown { } 2514bb3f43cSMark Brown }; 252420dd718SMark Brown MODULE_DEVICE_TABLE(i2c, wm1250_ev1_i2c_id); 2534bb3f43cSMark Brown 2544bb3f43cSMark Brown static struct i2c_driver wm1250_ev1_i2c_driver = { 2554bb3f43cSMark Brown .driver = { 2564bb3f43cSMark Brown .name = "wm1250-ev1", 2574bb3f43cSMark Brown .owner = THIS_MODULE, 2584bb3f43cSMark Brown }, 2594bb3f43cSMark Brown .probe = wm1250_ev1_probe, 260*7a79e94eSBill Pemberton .remove = wm1250_ev1_remove, 2614bb3f43cSMark Brown .id_table = wm1250_ev1_i2c_id, 2624bb3f43cSMark Brown }; 2634bb3f43cSMark Brown 264bbdd3915SMark Brown module_i2c_driver(wm1250_ev1_i2c_driver); 2654bb3f43cSMark Brown 2664bb3f43cSMark Brown MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); 2674bb3f43cSMark Brown MODULE_DESCRIPTION("WM1250-EV1 audio I/O module driver"); 2684bb3f43cSMark Brown MODULE_LICENSE("GPL"); 269