1 /*
2 * omap3pandora.c -- SoC audio for Pandora Handheld Console
3 *
4 * Author: Gražvydas Ignotas <notasas@gmail.com>
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * version 2 as published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
18 * 02110-1301 USA
19 *
20 */
21
22 #include <linux/clk.h>
23 #include <linux/platform_device.h>
24 #include <linux/gpio.h>
25 #include <linux/delay.h>
26 #include <linux/regulator/consumer.h>
27 #include <linux/module.h>
28
29 #include <sound/core.h>
30 #include <sound/pcm.h>
31 #include <sound/soc.h>
32
33 #include <asm/mach-types.h>
34 #include <plat/mcbsp.h>
35
36 #include "omap-mcbsp.h"
37 #include "omap-pcm.h"
38
39 #define OMAP3_PANDORA_DAC_POWER_GPIO 118
40 #define OMAP3_PANDORA_AMP_POWER_GPIO 14
41
42 #define PREFIX "ASoC omap3pandora: "
43
44 static struct regulator *omap3pandora_dac_reg;
45
omap3pandora_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params)46 static int omap3pandora_hw_params(struct snd_pcm_substream *substream,
47 struct snd_pcm_hw_params *params)
48 {
49 struct snd_soc_pcm_runtime *rtd = substream->private_data;
50 struct snd_soc_dai *codec_dai = rtd->codec_dai;
51 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
52 int ret;
53
54 /* Set the codec system clock for DAC and ADC */
55 ret = snd_soc_dai_set_sysclk(codec_dai, 0, 26000000,
56 SND_SOC_CLOCK_IN);
57 if (ret < 0) {
58 pr_err(PREFIX "can't set codec system clock\n");
59 return ret;
60 }
61
62 /* Set McBSP clock to external */
63 ret = snd_soc_dai_set_sysclk(cpu_dai, OMAP_MCBSP_SYSCLK_CLKS_EXT,
64 256 * params_rate(params),
65 SND_SOC_CLOCK_IN);
66 if (ret < 0) {
67 pr_err(PREFIX "can't set cpu system clock\n");
68 return ret;
69 }
70
71 ret = snd_soc_dai_set_clkdiv(cpu_dai, OMAP_MCBSP_CLKGDV, 8);
72 if (ret < 0) {
73 pr_err(PREFIX "can't set SRG clock divider\n");
74 return ret;
75 }
76
77 return 0;
78 }
79
omap3pandora_dac_event(struct snd_soc_dapm_widget * w,struct snd_kcontrol * k,int event)80 static int omap3pandora_dac_event(struct snd_soc_dapm_widget *w,
81 struct snd_kcontrol *k, int event)
82 {
83 /*
84 * The PCM1773 DAC datasheet requires 1ms delay between switching
85 * VCC power on/off and /PD pin high/low
86 */
87 if (SND_SOC_DAPM_EVENT_ON(event)) {
88 regulator_enable(omap3pandora_dac_reg);
89 mdelay(1);
90 gpio_set_value(OMAP3_PANDORA_DAC_POWER_GPIO, 1);
91 } else {
92 gpio_set_value(OMAP3_PANDORA_DAC_POWER_GPIO, 0);
93 mdelay(1);
94 regulator_disable(omap3pandora_dac_reg);
95 }
96
97 return 0;
98 }
99
omap3pandora_hp_event(struct snd_soc_dapm_widget * w,struct snd_kcontrol * k,int event)100 static int omap3pandora_hp_event(struct snd_soc_dapm_widget *w,
101 struct snd_kcontrol *k, int event)
102 {
103 if (SND_SOC_DAPM_EVENT_ON(event))
104 gpio_set_value(OMAP3_PANDORA_AMP_POWER_GPIO, 1);
105 else
106 gpio_set_value(OMAP3_PANDORA_AMP_POWER_GPIO, 0);
107
108 return 0;
109 }
110
111 /*
112 * Audio paths on Pandora board:
113 *
114 * |O| ---> PCM DAC +-> AMP -> Headphone Jack
115 * |M| A +--------> Line Out
116 * |A| <~~clk~~+
117 * |P| <--- TWL4030 <--------- Line In and MICs
118 */
119 static const struct snd_soc_dapm_widget omap3pandora_out_dapm_widgets[] = {
120 SND_SOC_DAPM_DAC_E("PCM DAC", "HiFi Playback", SND_SOC_NOPM,
121 0, 0, omap3pandora_dac_event,
122 SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
123 SND_SOC_DAPM_PGA_E("Headphone Amplifier", SND_SOC_NOPM,
124 0, 0, NULL, 0, omap3pandora_hp_event,
125 SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
126 SND_SOC_DAPM_HP("Headphone Jack", NULL),
127 SND_SOC_DAPM_LINE("Line Out", NULL),
128 };
129
130 static const struct snd_soc_dapm_widget omap3pandora_in_dapm_widgets[] = {
131 SND_SOC_DAPM_MIC("Mic (internal)", NULL),
132 SND_SOC_DAPM_MIC("Mic (external)", NULL),
133 SND_SOC_DAPM_LINE("Line In", NULL),
134 };
135
136 static const struct snd_soc_dapm_route omap3pandora_out_map[] = {
137 {"PCM DAC", NULL, "APLL Enable"},
138 {"Headphone Amplifier", NULL, "PCM DAC"},
139 {"Line Out", NULL, "PCM DAC"},
140 {"Headphone Jack", NULL, "Headphone Amplifier"},
141 };
142
143 static const struct snd_soc_dapm_route omap3pandora_in_map[] = {
144 {"AUXL", NULL, "Line In"},
145 {"AUXR", NULL, "Line In"},
146
147 {"MAINMIC", NULL, "Mic Bias 1"},
148 {"Mic Bias 1", NULL, "Mic (internal)"},
149
150 {"SUBMIC", NULL, "Mic Bias 2"},
151 {"Mic Bias 2", NULL, "Mic (external)"},
152 };
153
omap3pandora_out_init(struct snd_soc_pcm_runtime * rtd)154 static int omap3pandora_out_init(struct snd_soc_pcm_runtime *rtd)
155 {
156 struct snd_soc_codec *codec = rtd->codec;
157 struct snd_soc_dapm_context *dapm = &codec->dapm;
158 int ret;
159
160 /* All TWL4030 output pins are floating */
161 snd_soc_dapm_nc_pin(dapm, "EARPIECE");
162 snd_soc_dapm_nc_pin(dapm, "PREDRIVEL");
163 snd_soc_dapm_nc_pin(dapm, "PREDRIVER");
164 snd_soc_dapm_nc_pin(dapm, "HSOL");
165 snd_soc_dapm_nc_pin(dapm, "HSOR");
166 snd_soc_dapm_nc_pin(dapm, "CARKITL");
167 snd_soc_dapm_nc_pin(dapm, "CARKITR");
168 snd_soc_dapm_nc_pin(dapm, "HFL");
169 snd_soc_dapm_nc_pin(dapm, "HFR");
170 snd_soc_dapm_nc_pin(dapm, "VIBRA");
171
172 ret = snd_soc_dapm_new_controls(dapm, omap3pandora_out_dapm_widgets,
173 ARRAY_SIZE(omap3pandora_out_dapm_widgets));
174 if (ret < 0)
175 return ret;
176
177 return snd_soc_dapm_add_routes(dapm, omap3pandora_out_map,
178 ARRAY_SIZE(omap3pandora_out_map));
179 }
180
omap3pandora_in_init(struct snd_soc_pcm_runtime * rtd)181 static int omap3pandora_in_init(struct snd_soc_pcm_runtime *rtd)
182 {
183 struct snd_soc_codec *codec = rtd->codec;
184 struct snd_soc_dapm_context *dapm = &codec->dapm;
185 int ret;
186
187 /* Not comnnected */
188 snd_soc_dapm_nc_pin(dapm, "HSMIC");
189 snd_soc_dapm_nc_pin(dapm, "CARKITMIC");
190 snd_soc_dapm_nc_pin(dapm, "DIGIMIC0");
191 snd_soc_dapm_nc_pin(dapm, "DIGIMIC1");
192
193 ret = snd_soc_dapm_new_controls(dapm, omap3pandora_in_dapm_widgets,
194 ARRAY_SIZE(omap3pandora_in_dapm_widgets));
195 if (ret < 0)
196 return ret;
197
198 return snd_soc_dapm_add_routes(dapm, omap3pandora_in_map,
199 ARRAY_SIZE(omap3pandora_in_map));
200 }
201
202 static struct snd_soc_ops omap3pandora_ops = {
203 .hw_params = omap3pandora_hw_params,
204 };
205
206 /* Digital audio interface glue - connects codec <--> CPU */
207 static struct snd_soc_dai_link omap3pandora_dai[] = {
208 {
209 .name = "PCM1773",
210 .stream_name = "HiFi Out",
211 .cpu_dai_name = "omap-mcbsp-dai.1",
212 .codec_dai_name = "twl4030-hifi",
213 .platform_name = "omap-pcm-audio",
214 .codec_name = "twl4030-codec",
215 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
216 SND_SOC_DAIFMT_CBS_CFS,
217 .ops = &omap3pandora_ops,
218 .init = omap3pandora_out_init,
219 }, {
220 .name = "TWL4030",
221 .stream_name = "Line/Mic In",
222 .cpu_dai_name = "omap-mcbsp-dai.3",
223 .codec_dai_name = "twl4030-hifi",
224 .platform_name = "omap-pcm-audio",
225 .codec_name = "twl4030-codec",
226 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
227 SND_SOC_DAIFMT_CBS_CFS,
228 .ops = &omap3pandora_ops,
229 .init = omap3pandora_in_init,
230 }
231 };
232
233 /* SoC card */
234 static struct snd_soc_card snd_soc_card_omap3pandora = {
235 .name = "omap3pandora",
236 .owner = THIS_MODULE,
237 .dai_link = omap3pandora_dai,
238 .num_links = ARRAY_SIZE(omap3pandora_dai),
239 };
240
241 static struct platform_device *omap3pandora_snd_device;
242
omap3pandora_soc_init(void)243 static int __init omap3pandora_soc_init(void)
244 {
245 int ret;
246
247 if (!machine_is_omap3_pandora())
248 return -ENODEV;
249
250 pr_info("OMAP3 Pandora SoC init\n");
251
252 ret = gpio_request(OMAP3_PANDORA_DAC_POWER_GPIO, "dac_power");
253 if (ret) {
254 pr_err(PREFIX "Failed to get DAC power GPIO\n");
255 return ret;
256 }
257
258 ret = gpio_direction_output(OMAP3_PANDORA_DAC_POWER_GPIO, 0);
259 if (ret) {
260 pr_err(PREFIX "Failed to set DAC power GPIO direction\n");
261 goto fail0;
262 }
263
264 ret = gpio_request(OMAP3_PANDORA_AMP_POWER_GPIO, "amp_power");
265 if (ret) {
266 pr_err(PREFIX "Failed to get amp power GPIO\n");
267 goto fail0;
268 }
269
270 ret = gpio_direction_output(OMAP3_PANDORA_AMP_POWER_GPIO, 0);
271 if (ret) {
272 pr_err(PREFIX "Failed to set amp power GPIO direction\n");
273 goto fail1;
274 }
275
276 omap3pandora_snd_device = platform_device_alloc("soc-audio", -1);
277 if (omap3pandora_snd_device == NULL) {
278 pr_err(PREFIX "Platform device allocation failed\n");
279 ret = -ENOMEM;
280 goto fail1;
281 }
282
283 platform_set_drvdata(omap3pandora_snd_device, &snd_soc_card_omap3pandora);
284
285 ret = platform_device_add(omap3pandora_snd_device);
286 if (ret) {
287 pr_err(PREFIX "Unable to add platform device\n");
288 goto fail2;
289 }
290
291 omap3pandora_dac_reg = regulator_get(&omap3pandora_snd_device->dev, "vcc");
292 if (IS_ERR(omap3pandora_dac_reg)) {
293 pr_err(PREFIX "Failed to get DAC regulator from %s: %ld\n",
294 dev_name(&omap3pandora_snd_device->dev),
295 PTR_ERR(omap3pandora_dac_reg));
296 ret = PTR_ERR(omap3pandora_dac_reg);
297 goto fail3;
298 }
299
300 return 0;
301
302 fail3:
303 platform_device_del(omap3pandora_snd_device);
304 fail2:
305 platform_device_put(omap3pandora_snd_device);
306 fail1:
307 gpio_free(OMAP3_PANDORA_AMP_POWER_GPIO);
308 fail0:
309 gpio_free(OMAP3_PANDORA_DAC_POWER_GPIO);
310 return ret;
311 }
312 module_init(omap3pandora_soc_init);
313
omap3pandora_soc_exit(void)314 static void __exit omap3pandora_soc_exit(void)
315 {
316 regulator_put(omap3pandora_dac_reg);
317 platform_device_unregister(omap3pandora_snd_device);
318 gpio_free(OMAP3_PANDORA_AMP_POWER_GPIO);
319 gpio_free(OMAP3_PANDORA_DAC_POWER_GPIO);
320 }
321 module_exit(omap3pandora_soc_exit);
322
323 MODULE_AUTHOR("Grazvydas Ignotas <notasas@gmail.com>");
324 MODULE_DESCRIPTION("ALSA SoC OMAP3 Pandora");
325 MODULE_LICENSE("GPL");
326