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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * omap3pandora.c -- SoC audio for Pandora Handheld Console
4 *
5 * Author: GraÅžvydas Ignotas <notasas@gmail.com>
6 */
7
8#include <linux/clk.h>
9#include <linux/platform_device.h>
10#include <linux/gpio.h>
11#include <linux/delay.h>
12#include <linux/regulator/consumer.h>
13#include <linux/module.h>
14
15#include <sound/core.h>
16#include <sound/pcm.h>
17#include <sound/soc.h>
18
19#include <asm/mach-types.h>
20#include <linux/platform_data/asoc-ti-mcbsp.h>
21
22#include "omap-mcbsp.h"
23
24#define OMAP3_PANDORA_DAC_POWER_GPIO 118
25#define OMAP3_PANDORA_AMP_POWER_GPIO 14
26
27#define PREFIX "ASoC omap3pandora: "
28
29static struct regulator *omap3pandora_dac_reg;
30
31static int omap3pandora_hw_params(struct snd_pcm_substream *substream,
32 struct snd_pcm_hw_params *params)
33{
34 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
35 struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
36 struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
37 int ret;
38
39 /* Set the codec system clock for DAC and ADC */
40 ret = snd_soc_dai_set_sysclk(codec_dai, 0, 26000000,
41 SND_SOC_CLOCK_IN);
42 if (ret < 0) {
43 pr_err(PREFIX "can't set codec system clock\n");
44 return ret;
45 }
46
47 /* Set McBSP clock to external */
48 ret = snd_soc_dai_set_sysclk(cpu_dai, OMAP_MCBSP_SYSCLK_CLKS_EXT,
49 256 * params_rate(params),
50 SND_SOC_CLOCK_IN);
51 if (ret < 0) {
52 pr_err(PREFIX "can't set cpu system clock\n");
53 return ret;
54 }
55
56 ret = snd_soc_dai_set_clkdiv(cpu_dai, OMAP_MCBSP_CLKGDV, 8);
57 if (ret < 0) {
58 pr_err(PREFIX "can't set SRG clock divider\n");
59 return ret;
60 }
61
62 return 0;
63}
64
65static int omap3pandora_dac_event(struct snd_soc_dapm_widget *w,
66 struct snd_kcontrol *k, int event)
67{
68 int ret;
69
70 /*
71 * The PCM1773 DAC datasheet requires 1ms delay between switching
72 * VCC power on/off and /PD pin high/low
73 */
74 if (SND_SOC_DAPM_EVENT_ON(event)) {
75 ret = regulator_enable(omap3pandora_dac_reg);
76 if (ret) {
77 dev_err(w->dapm->dev, "Failed to power DAC: %d\n", ret);
78 return ret;
79 }
80 mdelay(1);
81 gpio_set_value(OMAP3_PANDORA_DAC_POWER_GPIO, 1);
82 } else {
83 gpio_set_value(OMAP3_PANDORA_DAC_POWER_GPIO, 0);
84 mdelay(1);
85 regulator_disable(omap3pandora_dac_reg);
86 }
87
88 return 0;
89}
90
91static int omap3pandora_hp_event(struct snd_soc_dapm_widget *w,
92 struct snd_kcontrol *k, int event)
93{
94 if (SND_SOC_DAPM_EVENT_ON(event))
95 gpio_set_value(OMAP3_PANDORA_AMP_POWER_GPIO, 1);
96 else
97 gpio_set_value(OMAP3_PANDORA_AMP_POWER_GPIO, 0);
98
99 return 0;
100}
101
102/*
103 * Audio paths on Pandora board:
104 *
105 * |O| ---> PCM DAC +-> AMP -> Headphone Jack
106 * |M| A +--------> Line Out
107 * |A| <~~clk~~+
108 * |P| <--- TWL4030 <--------- Line In and MICs
109 */
110static const struct snd_soc_dapm_widget omap3pandora_dapm_widgets[] = {
111 SND_SOC_DAPM_DAC_E("PCM DAC", "HiFi Playback", SND_SOC_NOPM,
112 0, 0, omap3pandora_dac_event,
113 SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
114 SND_SOC_DAPM_PGA_E("Headphone Amplifier", SND_SOC_NOPM,
115 0, 0, NULL, 0, omap3pandora_hp_event,
116 SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
117 SND_SOC_DAPM_HP("Headphone Jack", NULL),
118 SND_SOC_DAPM_LINE("Line Out", NULL),
119
120 SND_SOC_DAPM_MIC("Mic (internal)", NULL),
121 SND_SOC_DAPM_MIC("Mic (external)", NULL),
122 SND_SOC_DAPM_LINE("Line In", NULL),
123};
124
125static const struct snd_soc_dapm_route omap3pandora_map[] = {
126 {"PCM DAC", NULL, "APLL Enable"},
127 {"Headphone Amplifier", NULL, "PCM DAC"},
128 {"Line Out", NULL, "PCM DAC"},
129 {"Headphone Jack", NULL, "Headphone Amplifier"},
130
131 {"AUXL", NULL, "Line In"},
132 {"AUXR", NULL, "Line In"},
133
134 {"MAINMIC", NULL, "Mic (internal)"},
135 {"Mic (internal)", NULL, "Mic Bias 1"},
136
137 {"SUBMIC", NULL, "Mic (external)"},
138 {"Mic (external)", NULL, "Mic Bias 2"},
139};
140
141static int omap3pandora_out_init(struct snd_soc_pcm_runtime *rtd)
142{
143 struct snd_soc_dapm_context *dapm = &rtd->card->dapm;
144
145 /* All TWL4030 output pins are floating */
146 snd_soc_dapm_nc_pin(dapm, "EARPIECE");
147 snd_soc_dapm_nc_pin(dapm, "PREDRIVEL");
148 snd_soc_dapm_nc_pin(dapm, "PREDRIVER");
149 snd_soc_dapm_nc_pin(dapm, "HSOL");
150 snd_soc_dapm_nc_pin(dapm, "HSOR");
151 snd_soc_dapm_nc_pin(dapm, "CARKITL");
152 snd_soc_dapm_nc_pin(dapm, "CARKITR");
153 snd_soc_dapm_nc_pin(dapm, "HFL");
154 snd_soc_dapm_nc_pin(dapm, "HFR");
155 snd_soc_dapm_nc_pin(dapm, "VIBRA");
156
157 return 0;
158}
159
160static int omap3pandora_in_init(struct snd_soc_pcm_runtime *rtd)
161{
162 struct snd_soc_dapm_context *dapm = &rtd->card->dapm;
163
164 /* Not comnnected */
165 snd_soc_dapm_nc_pin(dapm, "HSMIC");
166 snd_soc_dapm_nc_pin(dapm, "CARKITMIC");
167 snd_soc_dapm_nc_pin(dapm, "DIGIMIC0");
168 snd_soc_dapm_nc_pin(dapm, "DIGIMIC1");
169
170 return 0;
171}
172
173static const struct snd_soc_ops omap3pandora_ops = {
174 .hw_params = omap3pandora_hw_params,
175};
176
177/* Digital audio interface glue - connects codec <--> CPU */
178SND_SOC_DAILINK_DEFS(out,
179 DAILINK_COMP_ARRAY(COMP_CPU("omap-mcbsp.2")),
180 DAILINK_COMP_ARRAY(COMP_CODEC("twl4030-codec", "twl4030-hifi")),
181 DAILINK_COMP_ARRAY(COMP_PLATFORM("omap-mcbsp.2")));
182
183SND_SOC_DAILINK_DEFS(in,
184 DAILINK_COMP_ARRAY(COMP_CPU("omap-mcbsp.4")),
185 DAILINK_COMP_ARRAY(COMP_CODEC("twl4030-codec", "twl4030-hifi")),
186 DAILINK_COMP_ARRAY(COMP_PLATFORM("omap-mcbsp.4")));
187
188static struct snd_soc_dai_link omap3pandora_dai[] = {
189 {
190 .name = "PCM1773",
191 .stream_name = "HiFi Out",
192 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
193 SND_SOC_DAIFMT_CBS_CFS,
194 .ops = &omap3pandora_ops,
195 .init = omap3pandora_out_init,
196 SND_SOC_DAILINK_REG(out),
197 }, {
198 .name = "TWL4030",
199 .stream_name = "Line/Mic In",
200 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
201 SND_SOC_DAIFMT_CBS_CFS,
202 .ops = &omap3pandora_ops,
203 .init = omap3pandora_in_init,
204 SND_SOC_DAILINK_REG(in),
205 }
206};
207
208/* SoC card */
209static struct snd_soc_card snd_soc_card_omap3pandora = {
210 .name = "omap3pandora",
211 .owner = THIS_MODULE,
212 .dai_link = omap3pandora_dai,
213 .num_links = ARRAY_SIZE(omap3pandora_dai),
214
215 .dapm_widgets = omap3pandora_dapm_widgets,
216 .num_dapm_widgets = ARRAY_SIZE(omap3pandora_dapm_widgets),
217 .dapm_routes = omap3pandora_map,
218 .num_dapm_routes = ARRAY_SIZE(omap3pandora_map),
219};
220
221static struct platform_device *omap3pandora_snd_device;
222
223static int __init omap3pandora_soc_init(void)
224{
225 int ret;
226
227 if (!machine_is_omap3_pandora())
228 return -ENODEV;
229
230 pr_info("OMAP3 Pandora SoC init\n");
231
232 ret = gpio_request(OMAP3_PANDORA_DAC_POWER_GPIO, "dac_power");
233 if (ret) {
234 pr_err(PREFIX "Failed to get DAC power GPIO\n");
235 return ret;
236 }
237
238 ret = gpio_direction_output(OMAP3_PANDORA_DAC_POWER_GPIO, 0);
239 if (ret) {
240 pr_err(PREFIX "Failed to set DAC power GPIO direction\n");
241 goto fail0;
242 }
243
244 ret = gpio_request(OMAP3_PANDORA_AMP_POWER_GPIO, "amp_power");
245 if (ret) {
246 pr_err(PREFIX "Failed to get amp power GPIO\n");
247 goto fail0;
248 }
249
250 ret = gpio_direction_output(OMAP3_PANDORA_AMP_POWER_GPIO, 0);
251 if (ret) {
252 pr_err(PREFIX "Failed to set amp power GPIO direction\n");
253 goto fail1;
254 }
255
256 omap3pandora_snd_device = platform_device_alloc("soc-audio", -1);
257 if (omap3pandora_snd_device == NULL) {
258 pr_err(PREFIX "Platform device allocation failed\n");
259 ret = -ENOMEM;
260 goto fail1;
261 }
262
263 platform_set_drvdata(omap3pandora_snd_device, &snd_soc_card_omap3pandora);
264
265 ret = platform_device_add(omap3pandora_snd_device);
266 if (ret) {
267 pr_err(PREFIX "Unable to add platform device\n");
268 goto fail2;
269 }
270
271 omap3pandora_dac_reg = regulator_get(&omap3pandora_snd_device->dev, "vcc");
272 if (IS_ERR(omap3pandora_dac_reg)) {
273 pr_err(PREFIX "Failed to get DAC regulator from %s: %ld\n",
274 dev_name(&omap3pandora_snd_device->dev),
275 PTR_ERR(omap3pandora_dac_reg));
276 ret = PTR_ERR(omap3pandora_dac_reg);
277 goto fail3;
278 }
279
280 return 0;
281
282fail3:
283 platform_device_del(omap3pandora_snd_device);
284fail2:
285 platform_device_put(omap3pandora_snd_device);
286fail1:
287 gpio_free(OMAP3_PANDORA_AMP_POWER_GPIO);
288fail0:
289 gpio_free(OMAP3_PANDORA_DAC_POWER_GPIO);
290 return ret;
291}
292module_init(omap3pandora_soc_init);
293
294static void __exit omap3pandora_soc_exit(void)
295{
296 regulator_put(omap3pandora_dac_reg);
297 platform_device_unregister(omap3pandora_snd_device);
298 gpio_free(OMAP3_PANDORA_AMP_POWER_GPIO);
299 gpio_free(OMAP3_PANDORA_DAC_POWER_GPIO);
300}
301module_exit(omap3pandora_soc_exit);
302
303MODULE_AUTHOR("Grazvydas Ignotas <notasas@gmail.com>");
304MODULE_DESCRIPTION("ALSA SoC OMAP3 Pandora");
305MODULE_LICENSE("GPL");