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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Driver for the 1250-EV1 audio I/O module
4 *
5 * Copyright 2011 Wolfson Microelectronics plc
6 */
7
8#include <linux/init.h>
9#include <linux/module.h>
10#include <linux/slab.h>
11#include <linux/i2c.h>
12#include <linux/gpio/consumer.h>
13
14#include <sound/soc.h>
15#include <sound/soc-dapm.h>
16
17struct wm1250_priv {
18 struct gpio_desc *clk_ena;
19 struct gpio_desc *clk_sel0;
20 struct gpio_desc *clk_sel1;
21 struct gpio_desc *osr;
22 struct gpio_desc *master;
23};
24
25static int wm1250_ev1_set_bias_level(struct snd_soc_component *component,
26 enum snd_soc_bias_level level)
27{
28 struct wm1250_priv *wm1250 = dev_get_drvdata(component->dev);
29
30 switch (level) {
31 case SND_SOC_BIAS_ON:
32 break;
33
34 case SND_SOC_BIAS_PREPARE:
35 break;
36
37 case SND_SOC_BIAS_STANDBY:
38 gpiod_set_value_cansleep(wm1250->clk_ena, 1);
39 break;
40
41 case SND_SOC_BIAS_OFF:
42 gpiod_set_value_cansleep(wm1250->clk_ena, 0);
43 break;
44 }
45
46 return 0;
47}
48
49static const struct snd_soc_dapm_widget wm1250_ev1_dapm_widgets[] = {
50SND_SOC_DAPM_ADC("ADC", "wm1250-ev1 Capture", SND_SOC_NOPM, 0, 0),
51SND_SOC_DAPM_DAC("DAC", "wm1250-ev1 Playback", SND_SOC_NOPM, 0, 0),
52
53SND_SOC_DAPM_INPUT("WM1250 Input"),
54SND_SOC_DAPM_OUTPUT("WM1250 Output"),
55};
56
57static const struct snd_soc_dapm_route wm1250_ev1_dapm_routes[] = {
58 { "ADC", NULL, "WM1250 Input" },
59 { "WM1250 Output", NULL, "DAC" },
60};
61
62static int wm1250_ev1_hw_params(struct snd_pcm_substream *substream,
63 struct snd_pcm_hw_params *params,
64 struct snd_soc_dai *dai)
65{
66 struct wm1250_priv *wm1250 = snd_soc_component_get_drvdata(dai->component);
67
68 switch (params_rate(params)) {
69 case 8000:
70 gpiod_set_value(wm1250->clk_sel0, 1);
71 gpiod_set_value(wm1250->clk_sel1, 1);
72 break;
73 case 16000:
74 gpiod_set_value(wm1250->clk_sel0, 0);
75 gpiod_set_value(wm1250->clk_sel1, 1);
76 break;
77 case 32000:
78 gpiod_set_value(wm1250->clk_sel0, 1);
79 gpiod_set_value(wm1250->clk_sel1, 0);
80 break;
81 case 64000:
82 gpiod_set_value(wm1250->clk_sel0, 0);
83 gpiod_set_value(wm1250->clk_sel1, 0);
84 break;
85 default:
86 return -EINVAL;
87 }
88
89 return 0;
90}
91
92static const struct snd_soc_dai_ops wm1250_ev1_ops = {
93 .hw_params = wm1250_ev1_hw_params,
94};
95
96#define WM1250_EV1_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000 |\
97 SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_64000)
98
99static struct snd_soc_dai_driver wm1250_ev1_dai = {
100 .name = "wm1250-ev1",
101 .playback = {
102 .stream_name = "Playback",
103 .channels_min = 1,
104 .channels_max = 2,
105 .rates = WM1250_EV1_RATES,
106 .formats = SNDRV_PCM_FMTBIT_S16_LE,
107 },
108 .capture = {
109 .stream_name = "Capture",
110 .channels_min = 1,
111 .channels_max = 2,
112 .rates = WM1250_EV1_RATES,
113 .formats = SNDRV_PCM_FMTBIT_S16_LE,
114 },
115 .ops = &wm1250_ev1_ops,
116};
117
118static const struct snd_soc_component_driver soc_component_dev_wm1250_ev1 = {
119 .dapm_widgets = wm1250_ev1_dapm_widgets,
120 .num_dapm_widgets = ARRAY_SIZE(wm1250_ev1_dapm_widgets),
121 .dapm_routes = wm1250_ev1_dapm_routes,
122 .num_dapm_routes = ARRAY_SIZE(wm1250_ev1_dapm_routes),
123 .set_bias_level = wm1250_ev1_set_bias_level,
124 .use_pmdown_time = 1,
125 .endianness = 1,
126};
127
128static int wm1250_ev1_pdata(struct i2c_client *i2c)
129{
130 struct wm1250_ev1_pdata *pdata = dev_get_platdata(&i2c->dev);
131 struct wm1250_priv *wm1250;
132
133 if (!pdata)
134 return 0;
135
136 wm1250 = devm_kzalloc(&i2c->dev, sizeof(*wm1250), GFP_KERNEL);
137 if (!wm1250)
138 return -ENOMEM;
139
140 wm1250->clk_ena = devm_gpiod_get(&i2c->dev, "clk-ena", GPIOD_OUT_LOW);
141 if (IS_ERR(wm1250->clk_ena))
142 return dev_err_probe(&i2c->dev, PTR_ERR(wm1250->clk_ena),
143 "failed to get clock enable GPIO\n");
144
145 wm1250->clk_sel0 = devm_gpiod_get(&i2c->dev, "clk-sel0", GPIOD_OUT_HIGH);
146 if (IS_ERR(wm1250->clk_sel0))
147 return dev_err_probe(&i2c->dev, PTR_ERR(wm1250->clk_sel0),
148 "failed to get clock sel0 GPIO\n");
149
150 wm1250->clk_sel1 = devm_gpiod_get(&i2c->dev, "clk-sel1", GPIOD_OUT_HIGH);
151 if (IS_ERR(wm1250->clk_sel1))
152 return dev_err_probe(&i2c->dev, PTR_ERR(wm1250->clk_sel1),
153 "failed to get clock sel1 GPIO\n");
154
155 wm1250->osr = devm_gpiod_get(&i2c->dev, "osr", GPIOD_OUT_LOW);
156 if (IS_ERR(wm1250->osr))
157 return dev_err_probe(&i2c->dev, PTR_ERR(wm1250->osr),
158 "failed to get OSR GPIO\n");
159
160 wm1250->master = devm_gpiod_get(&i2c->dev, "master", GPIOD_OUT_LOW);
161 if (IS_ERR(wm1250->master))
162 return dev_err_probe(&i2c->dev, PTR_ERR(wm1250->master),
163 "failed to get MASTER GPIO\n");
164
165 dev_set_drvdata(&i2c->dev, wm1250);
166
167 return 0;
168}
169
170static int wm1250_ev1_probe(struct i2c_client *i2c)
171{
172 int id, board, rev, ret;
173
174 dev_set_drvdata(&i2c->dev, NULL);
175
176 board = i2c_smbus_read_byte_data(i2c, 0);
177 if (board < 0) {
178 dev_err(&i2c->dev, "Failed to read ID: %d\n", board);
179 return board;
180 }
181
182 id = (board & 0xfe) >> 2;
183 rev = board & 0x3;
184
185 if (id != 1) {
186 dev_err(&i2c->dev, "Unknown board ID %d\n", id);
187 return -ENODEV;
188 }
189
190 dev_info(&i2c->dev, "revision %d\n", rev + 1);
191
192 ret = wm1250_ev1_pdata(i2c);
193 if (ret != 0)
194 return ret;
195
196 ret = devm_snd_soc_register_component(&i2c->dev, &soc_component_dev_wm1250_ev1,
197 &wm1250_ev1_dai, 1);
198 if (ret != 0) {
199 dev_err(&i2c->dev, "Failed to register CODEC: %d\n", ret);
200 return ret;
201 }
202
203 return 0;
204}
205
206static const struct i2c_device_id wm1250_ev1_i2c_id[] = {
207 { "wm1250-ev1" },
208 { }
209};
210MODULE_DEVICE_TABLE(i2c, wm1250_ev1_i2c_id);
211
212static struct i2c_driver wm1250_ev1_i2c_driver = {
213 .driver = {
214 .name = "wm1250-ev1",
215 },
216 .probe = wm1250_ev1_probe,
217 .id_table = wm1250_ev1_i2c_id,
218};
219
220module_i2c_driver(wm1250_ev1_i2c_driver);
221
222MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
223MODULE_DESCRIPTION("WM1250-EV1 audio I/O module driver");
224MODULE_LICENSE("GPL");
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/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 const struct snd_soc_codec_driver soc_codec_dev_wm1250_ev1 = {
145 .component_driver = {
146 .dapm_widgets = wm1250_ev1_dapm_widgets,
147 .num_dapm_widgets = ARRAY_SIZE(wm1250_ev1_dapm_widgets),
148 .dapm_routes = wm1250_ev1_dapm_routes,
149 .num_dapm_routes = ARRAY_SIZE(wm1250_ev1_dapm_routes),
150 },
151 .set_bias_level = wm1250_ev1_set_bias_level,
152 .idle_bias_off = true,
153};
154
155static int wm1250_ev1_pdata(struct i2c_client *i2c)
156{
157 struct wm1250_ev1_pdata *pdata = dev_get_platdata(&i2c->dev);
158 struct wm1250_priv *wm1250;
159 int i, ret;
160
161 if (!pdata)
162 return 0;
163
164 wm1250 = devm_kzalloc(&i2c->dev, sizeof(*wm1250), GFP_KERNEL);
165 if (!wm1250) {
166 ret = -ENOMEM;
167 goto err;
168 }
169
170 for (i = 0; i < ARRAY_SIZE(wm1250->gpios); i++) {
171 wm1250->gpios[i].gpio = pdata->gpios[i];
172 wm1250->gpios[i].label = wm1250_gpio_names[i];
173 wm1250->gpios[i].flags = GPIOF_OUT_INIT_LOW;
174 }
175 wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL0].flags = GPIOF_OUT_INIT_HIGH;
176 wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL1].flags = GPIOF_OUT_INIT_HIGH;
177
178 ret = gpio_request_array(wm1250->gpios, ARRAY_SIZE(wm1250->gpios));
179 if (ret != 0) {
180 dev_err(&i2c->dev, "Failed to get GPIOs: %d\n", ret);
181 goto err;
182 }
183
184 dev_set_drvdata(&i2c->dev, wm1250);
185
186 return ret;
187
188err:
189 return ret;
190}
191
192static void wm1250_ev1_free(struct i2c_client *i2c)
193{
194 struct wm1250_priv *wm1250 = dev_get_drvdata(&i2c->dev);
195
196 if (wm1250)
197 gpio_free_array(wm1250->gpios, ARRAY_SIZE(wm1250->gpios));
198}
199
200static int wm1250_ev1_probe(struct i2c_client *i2c,
201 const struct i2c_device_id *i2c_id)
202{
203 int id, board, rev, ret;
204
205 dev_set_drvdata(&i2c->dev, NULL);
206
207 board = i2c_smbus_read_byte_data(i2c, 0);
208 if (board < 0) {
209 dev_err(&i2c->dev, "Failed to read ID: %d\n", board);
210 return board;
211 }
212
213 id = (board & 0xfe) >> 2;
214 rev = board & 0x3;
215
216 if (id != 1) {
217 dev_err(&i2c->dev, "Unknown board ID %d\n", id);
218 return -ENODEV;
219 }
220
221 dev_info(&i2c->dev, "revision %d\n", rev + 1);
222
223 ret = wm1250_ev1_pdata(i2c);
224 if (ret != 0)
225 return ret;
226
227 ret = snd_soc_register_codec(&i2c->dev, &soc_codec_dev_wm1250_ev1,
228 &wm1250_ev1_dai, 1);
229 if (ret != 0) {
230 dev_err(&i2c->dev, "Failed to register CODEC: %d\n", ret);
231 wm1250_ev1_free(i2c);
232 return ret;
233 }
234
235 return 0;
236}
237
238static int wm1250_ev1_remove(struct i2c_client *i2c)
239{
240 snd_soc_unregister_codec(&i2c->dev);
241 wm1250_ev1_free(i2c);
242
243 return 0;
244}
245
246static const struct i2c_device_id wm1250_ev1_i2c_id[] = {
247 { "wm1250-ev1", 0 },
248 { }
249};
250MODULE_DEVICE_TABLE(i2c, wm1250_ev1_i2c_id);
251
252static struct i2c_driver wm1250_ev1_i2c_driver = {
253 .driver = {
254 .name = "wm1250-ev1",
255 },
256 .probe = wm1250_ev1_probe,
257 .remove = wm1250_ev1_remove,
258 .id_table = wm1250_ev1_i2c_id,
259};
260
261module_i2c_driver(wm1250_ev1_i2c_driver);
262
263MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
264MODULE_DESCRIPTION("WM1250-EV1 audio I/O module driver");
265MODULE_LICENSE("GPL");