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13#include <linux/init.h>
14#include <linux/module.h>
15#include <linux/slab.h>
16#include <linux/i2c.h>
17#include <linux/gpio.h>
18
19#include <sound/soc.h>
20#include <sound/soc-dapm.h>
21#include <sound/wm1250-ev1.h>
22
23static const char *wm1250_gpio_names[WM1250_EV1_NUM_GPIOS] = {
24 "WM1250 CLK_ENA",
25 "WM1250 CLK_SEL0",
26 "WM1250 CLK_SEL1",
27 "WM1250 OSR",
28 "WM1250 MASTER",
29};
30
31struct wm1250_priv {
32 struct gpio gpios[WM1250_EV1_NUM_GPIOS];
33};
34
35static int wm1250_ev1_set_bias_level(struct snd_soc_codec *codec,
36 enum snd_soc_bias_level level)
37{
38 struct wm1250_priv *wm1250 = dev_get_drvdata(codec->dev);
39 int ena;
40
41 if (wm1250)
42 ena = wm1250->gpios[WM1250_EV1_GPIO_CLK_ENA].gpio;
43 else
44 ena = -1;
45
46 switch (level) {
47 case SND_SOC_BIAS_ON:
48 break;
49
50 case SND_SOC_BIAS_PREPARE:
51 break;
52
53 case SND_SOC_BIAS_STANDBY:
54 if (ena >= 0)
55 gpio_set_value_cansleep(ena, 1);
56 break;
57
58 case SND_SOC_BIAS_OFF:
59 if (ena >= 0)
60 gpio_set_value_cansleep(ena, 0);
61 break;
62 }
63
64 return 0;
65}
66
67static const struct snd_soc_dapm_widget wm1250_ev1_dapm_widgets[] = {
68SND_SOC_DAPM_ADC("ADC", "wm1250-ev1 Capture", SND_SOC_NOPM, 0, 0),
69SND_SOC_DAPM_DAC("DAC", "wm1250-ev1 Playback", SND_SOC_NOPM, 0, 0),
70
71SND_SOC_DAPM_INPUT("WM1250 Input"),
72SND_SOC_DAPM_OUTPUT("WM1250 Output"),
73};
74
75static const struct snd_soc_dapm_route wm1250_ev1_dapm_routes[] = {
76 { "ADC", NULL, "WM1250 Input" },
77 { "WM1250 Output", NULL, "DAC" },
78};
79
80static int wm1250_ev1_hw_params(struct snd_pcm_substream *substream,
81 struct snd_pcm_hw_params *params,
82 struct snd_soc_dai *dai)
83{
84 struct wm1250_priv *wm1250 = snd_soc_codec_get_drvdata(dai->codec);
85
86 switch (params_rate(params)) {
87 case 8000:
88 gpio_set_value(wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL0].gpio,
89 1);
90 gpio_set_value(wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL1].gpio,
91 1);
92 break;
93 case 16000:
94 gpio_set_value(wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL0].gpio,
95 0);
96 gpio_set_value(wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL1].gpio,
97 1);
98 break;
99 case 32000:
100 gpio_set_value(wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL0].gpio,
101 1);
102 gpio_set_value(wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL1].gpio,
103 0);
104 break;
105 case 64000:
106 gpio_set_value(wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL0].gpio,
107 0);
108 gpio_set_value(wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL1].gpio,
109 0);
110 break;
111 default:
112 return -EINVAL;
113 }
114
115 return 0;
116}
117
118static const struct snd_soc_dai_ops wm1250_ev1_ops = {
119 .hw_params = wm1250_ev1_hw_params,
120};
121
122#define WM1250_EV1_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000 |\
123 SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_64000)
124
125static struct snd_soc_dai_driver wm1250_ev1_dai = {
126 .name = "wm1250-ev1",
127 .playback = {
128 .stream_name = "Playback",
129 .channels_min = 1,
130 .channels_max = 2,
131 .rates = WM1250_EV1_RATES,
132 .formats = SNDRV_PCM_FMTBIT_S16_LE,
133 },
134 .capture = {
135 .stream_name = "Capture",
136 .channels_min = 1,
137 .channels_max = 2,
138 .rates = WM1250_EV1_RATES,
139 .formats = SNDRV_PCM_FMTBIT_S16_LE,
140 },
141 .ops = &wm1250_ev1_ops,
142};
143
144static struct snd_soc_codec_driver soc_codec_dev_wm1250_ev1 = {
145 .dapm_widgets = wm1250_ev1_dapm_widgets,
146 .num_dapm_widgets = ARRAY_SIZE(wm1250_ev1_dapm_widgets),
147 .dapm_routes = wm1250_ev1_dapm_routes,
148 .num_dapm_routes = ARRAY_SIZE(wm1250_ev1_dapm_routes),
149
150 .set_bias_level = wm1250_ev1_set_bias_level,
151 .idle_bias_off = true,
152};
153
154static int wm1250_ev1_pdata(struct i2c_client *i2c)
155{
156 struct wm1250_ev1_pdata *pdata = dev_get_platdata(&i2c->dev);
157 struct wm1250_priv *wm1250;
158 int i, ret;
159
160 if (!pdata)
161 return 0;
162
163 wm1250 = devm_kzalloc(&i2c->dev, sizeof(*wm1250), GFP_KERNEL);
164 if (!wm1250) {
165 ret = -ENOMEM;
166 goto err;
167 }
168
169 for (i = 0; i < ARRAY_SIZE(wm1250->gpios); i++) {
170 wm1250->gpios[i].gpio = pdata->gpios[i];
171 wm1250->gpios[i].label = wm1250_gpio_names[i];
172 wm1250->gpios[i].flags = GPIOF_OUT_INIT_LOW;
173 }
174 wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL0].flags = GPIOF_OUT_INIT_HIGH;
175 wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL1].flags = GPIOF_OUT_INIT_HIGH;
176
177 ret = gpio_request_array(wm1250->gpios, ARRAY_SIZE(wm1250->gpios));
178 if (ret != 0) {
179 dev_err(&i2c->dev, "Failed to get GPIOs: %d\n", ret);
180 goto err;
181 }
182
183 dev_set_drvdata(&i2c->dev, wm1250);
184
185 return ret;
186
187err:
188 return ret;
189}
190
191static void wm1250_ev1_free(struct i2c_client *i2c)
192{
193 struct wm1250_priv *wm1250 = dev_get_drvdata(&i2c->dev);
194
195 if (wm1250)
196 gpio_free_array(wm1250->gpios, ARRAY_SIZE(wm1250->gpios));
197}
198
199static int wm1250_ev1_probe(struct i2c_client *i2c,
200 const struct i2c_device_id *i2c_id)
201{
202 int id, board, rev, ret;
203
204 dev_set_drvdata(&i2c->dev, NULL);
205
206 board = i2c_smbus_read_byte_data(i2c, 0);
207 if (board < 0) {
208 dev_err(&i2c->dev, "Failed to read ID: %d\n", board);
209 return board;
210 }
211
212 id = (board & 0xfe) >> 2;
213 rev = board & 0x3;
214
215 if (id != 1) {
216 dev_err(&i2c->dev, "Unknown board ID %d\n", id);
217 return -ENODEV;
218 }
219
220 dev_info(&i2c->dev, "revision %d\n", rev + 1);
221
222 ret = wm1250_ev1_pdata(i2c);
223 if (ret != 0)
224 return ret;
225
226 ret = snd_soc_register_codec(&i2c->dev, &soc_codec_dev_wm1250_ev1,
227 &wm1250_ev1_dai, 1);
228 if (ret != 0) {
229 dev_err(&i2c->dev, "Failed to register CODEC: %d\n", ret);
230 wm1250_ev1_free(i2c);
231 return ret;
232 }
233
234 return 0;
235}
236
237static int wm1250_ev1_remove(struct i2c_client *i2c)
238{
239 snd_soc_unregister_codec(&i2c->dev);
240 wm1250_ev1_free(i2c);
241
242 return 0;
243}
244
245static const struct i2c_device_id wm1250_ev1_i2c_id[] = {
246 { "wm1250-ev1", 0 },
247 { }
248};
249MODULE_DEVICE_TABLE(i2c, wm1250_ev1_i2c_id);
250
251static struct i2c_driver wm1250_ev1_i2c_driver = {
252 .driver = {
253 .name = "wm1250-ev1",
254 },
255 .probe = wm1250_ev1_probe,
256 .remove = wm1250_ev1_remove,
257 .id_table = wm1250_ev1_i2c_id,
258};
259
260module_i2c_driver(wm1250_ev1_i2c_driver);
261
262MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
263MODULE_DESCRIPTION("WM1250-EV1 audio I/O module driver");
264MODULE_LICENSE("GPL");
265
