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8#include <linux/init.h>
9#include <linux/module.h>
10#include <linux/slab.h>
11#include <linux/i2c.h>
12#include <linux/gpio.h>
13
14#include <sound/soc.h>
15#include <sound/soc-dapm.h>
16#include <sound/wm1250-ev1.h>
17
18static const char *wm1250_gpio_names[WM1250_EV1_NUM_GPIOS] = {
19 "WM1250 CLK_ENA",
20 "WM1250 CLK_SEL0",
21 "WM1250 CLK_SEL1",
22 "WM1250 OSR",
23 "WM1250 MASTER",
24};
25
26struct wm1250_priv {
27 struct gpio gpios[WM1250_EV1_NUM_GPIOS];
28};
29
30static int wm1250_ev1_set_bias_level(struct snd_soc_component *component,
31 enum snd_soc_bias_level level)
32{
33 struct wm1250_priv *wm1250 = dev_get_drvdata(component->dev);
34 int ena;
35
36 if (wm1250)
37 ena = wm1250->gpios[WM1250_EV1_GPIO_CLK_ENA].gpio;
38 else
39 ena = -1;
40
41 switch (level) {
42 case SND_SOC_BIAS_ON:
43 break;
44
45 case SND_SOC_BIAS_PREPARE:
46 break;
47
48 case SND_SOC_BIAS_STANDBY:
49 if (ena >= 0)
50 gpio_set_value_cansleep(ena, 1);
51 break;
52
53 case SND_SOC_BIAS_OFF:
54 if (ena >= 0)
55 gpio_set_value_cansleep(ena, 0);
56 break;
57 }
58
59 return 0;
60}
61
62static const struct snd_soc_dapm_widget wm1250_ev1_dapm_widgets[] = {
63SND_SOC_DAPM_ADC("ADC", "wm1250-ev1 Capture", SND_SOC_NOPM, 0, 0),
64SND_SOC_DAPM_DAC("DAC", "wm1250-ev1 Playback", SND_SOC_NOPM, 0, 0),
65
66SND_SOC_DAPM_INPUT("WM1250 Input"),
67SND_SOC_DAPM_OUTPUT("WM1250 Output"),
68};
69
70static const struct snd_soc_dapm_route wm1250_ev1_dapm_routes[] = {
71 { "ADC", NULL, "WM1250 Input" },
72 { "WM1250 Output", NULL, "DAC" },
73};
74
75static int wm1250_ev1_hw_params(struct snd_pcm_substream *substream,
76 struct snd_pcm_hw_params *params,
77 struct snd_soc_dai *dai)
78{
79 struct wm1250_priv *wm1250 = snd_soc_component_get_drvdata(dai->component);
80
81 switch (params_rate(params)) {
82 case 8000:
83 gpio_set_value(wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL0].gpio,
84 1);
85 gpio_set_value(wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL1].gpio,
86 1);
87 break;
88 case 16000:
89 gpio_set_value(wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL0].gpio,
90 0);
91 gpio_set_value(wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL1].gpio,
92 1);
93 break;
94 case 32000:
95 gpio_set_value(wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL0].gpio,
96 1);
97 gpio_set_value(wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL1].gpio,
98 0);
99 break;
100 case 64000:
101 gpio_set_value(wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL0].gpio,
102 0);
103 gpio_set_value(wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL1].gpio,
104 0);
105 break;
106 default:
107 return -EINVAL;
108 }
109
110 return 0;
111}
112
113static const struct snd_soc_dai_ops wm1250_ev1_ops = {
114 .hw_params = wm1250_ev1_hw_params,
115};
116
117#define WM1250_EV1_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000 |\
118 SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_64000)
119
120static struct snd_soc_dai_driver wm1250_ev1_dai = {
121 .name = "wm1250-ev1",
122 .playback = {
123 .stream_name = "Playback",
124 .channels_min = 1,
125 .channels_max = 2,
126 .rates = WM1250_EV1_RATES,
127 .formats = SNDRV_PCM_FMTBIT_S16_LE,
128 },
129 .capture = {
130 .stream_name = "Capture",
131 .channels_min = 1,
132 .channels_max = 2,
133 .rates = WM1250_EV1_RATES,
134 .formats = SNDRV_PCM_FMTBIT_S16_LE,
135 },
136 .ops = &wm1250_ev1_ops,
137};
138
139static const struct snd_soc_component_driver soc_component_dev_wm1250_ev1 = {
140 .dapm_widgets = wm1250_ev1_dapm_widgets,
141 .num_dapm_widgets = ARRAY_SIZE(wm1250_ev1_dapm_widgets),
142 .dapm_routes = wm1250_ev1_dapm_routes,
143 .num_dapm_routes = ARRAY_SIZE(wm1250_ev1_dapm_routes),
144 .set_bias_level = wm1250_ev1_set_bias_level,
145 .use_pmdown_time = 1,
146 .endianness = 1,
147 .non_legacy_dai_naming = 1,
148};
149
150static int wm1250_ev1_pdata(struct i2c_client *i2c)
151{
152 struct wm1250_ev1_pdata *pdata = dev_get_platdata(&i2c->dev);
153 struct wm1250_priv *wm1250;
154 int i, ret;
155
156 if (!pdata)
157 return 0;
158
159 wm1250 = devm_kzalloc(&i2c->dev, sizeof(*wm1250), GFP_KERNEL);
160 if (!wm1250) {
161 ret = -ENOMEM;
162 goto err;
163 }
164
165 for (i = 0; i < ARRAY_SIZE(wm1250->gpios); i++) {
166 wm1250->gpios[i].gpio = pdata->gpios[i];
167 wm1250->gpios[i].label = wm1250_gpio_names[i];
168 wm1250->gpios[i].flags = GPIOF_OUT_INIT_LOW;
169 }
170 wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL0].flags = GPIOF_OUT_INIT_HIGH;
171 wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL1].flags = GPIOF_OUT_INIT_HIGH;
172
173 ret = gpio_request_array(wm1250->gpios, ARRAY_SIZE(wm1250->gpios));
174 if (ret != 0) {
175 dev_err(&i2c->dev, "Failed to get GPIOs: %d\n", ret);
176 goto err;
177 }
178
179 dev_set_drvdata(&i2c->dev, wm1250);
180
181 return ret;
182
183err:
184 return ret;
185}
186
187static void wm1250_ev1_free(struct i2c_client *i2c)
188{
189 struct wm1250_priv *wm1250 = dev_get_drvdata(&i2c->dev);
190
191 if (wm1250)
192 gpio_free_array(wm1250->gpios, ARRAY_SIZE(wm1250->gpios));
193}
194
195static int wm1250_ev1_probe(struct i2c_client *i2c,
196 const struct i2c_device_id *i2c_id)
197{
198 int id, board, rev, ret;
199
200 dev_set_drvdata(&i2c->dev, NULL);
201
202 board = i2c_smbus_read_byte_data(i2c, 0);
203 if (board < 0) {
204 dev_err(&i2c->dev, "Failed to read ID: %d\n", board);
205 return board;
206 }
207
208 id = (board & 0xfe) >> 2;
209 rev = board & 0x3;
210
211 if (id != 1) {
212 dev_err(&i2c->dev, "Unknown board ID %d\n", id);
213 return -ENODEV;
214 }
215
216 dev_info(&i2c->dev, "revision %d\n", rev + 1);
217
218 ret = wm1250_ev1_pdata(i2c);
219 if (ret != 0)
220 return ret;
221
222 ret = devm_snd_soc_register_component(&i2c->dev, &soc_component_dev_wm1250_ev1,
223 &wm1250_ev1_dai, 1);
224 if (ret != 0) {
225 dev_err(&i2c->dev, "Failed to register CODEC: %d\n", ret);
226 wm1250_ev1_free(i2c);
227 return ret;
228 }
229
230 return 0;
231}
232
233static int wm1250_ev1_remove(struct i2c_client *i2c)
234{
235 wm1250_ev1_free(i2c);
236
237 return 0;
238}
239
240static const struct i2c_device_id wm1250_ev1_i2c_id[] = {
241 { "wm1250-ev1", 0 },
242 { }
243};
244MODULE_DEVICE_TABLE(i2c, wm1250_ev1_i2c_id);
245
246static struct i2c_driver wm1250_ev1_i2c_driver = {
247 .driver = {
248 .name = "wm1250-ev1",
249 },
250 .probe = wm1250_ev1_probe,
251 .remove = wm1250_ev1_remove,
252 .id_table = wm1250_ev1_i2c_id,
253};
254
255module_i2c_driver(wm1250_ev1_i2c_driver);
256
257MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
258MODULE_DESCRIPTION("WM1250-EV1 audio I/O module driver");
259MODULE_LICENSE("GPL");
260
