2 * omap3pandora.c -- SoC audio for Pandora Handheld Console
4 * Author: GraÅžvydas Ignotas <notasas@gmail.com>
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.
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.
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
22 #include <linux/clk.h>
23 #include <linux/platform_device.h>
24 #include <linux/gpio.h>
25 #include <linux/delay.h>
27 #include <sound/core.h>
28 #include <sound/pcm.h>
29 #include <sound/soc.h>
30 #include <sound/soc-dapm.h>
32 #include <asm/mach-types.h>
34 #include "omap-mcbsp.h"
36 #include "../codecs/twl4030.h"
38 #define OMAP3_PANDORA_DAC_POWER_GPIO 118
39 #define OMAP3_PANDORA_AMP_POWER_GPIO 14
41 #define PREFIX "ASoC omap3pandora: "
43 static int omap3pandora_cmn_hw_params(struct snd_soc_dai *codec_dai,
44 struct snd_soc_dai *cpu_dai, unsigned int fmt)
48 /* Set codec DAI configuration */
49 ret = snd_soc_dai_set_fmt(codec_dai, fmt);
51 pr_err(PREFIX "can't set codec DAI configuration\n");
55 /* Set cpu DAI configuration */
56 ret = snd_soc_dai_set_fmt(cpu_dai, fmt);
58 pr_err(PREFIX "can't set cpu DAI configuration\n");
62 /* Set the codec system clock for DAC and ADC */
63 ret = snd_soc_dai_set_sysclk(codec_dai, 0, 26000000,
66 pr_err(PREFIX "can't set codec system clock\n");
70 /* Set McBSP clock to external */
71 ret = snd_soc_dai_set_sysclk(cpu_dai, OMAP_MCBSP_SYSCLK_CLKS_EXT, 0,
74 pr_err(PREFIX "can't set cpu system clock\n");
78 ret = snd_soc_dai_set_clkdiv(cpu_dai, OMAP_MCBSP_CLKGDV, 8);
80 pr_err(PREFIX "can't set SRG clock divider\n");
87 static int omap3pandora_out_hw_params(struct snd_pcm_substream *substream,
88 struct snd_pcm_hw_params *params)
90 struct snd_soc_pcm_runtime *rtd = substream->private_data;
91 struct snd_soc_dai *codec_dai = rtd->dai->codec_dai;
92 struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
94 return omap3pandora_cmn_hw_params(codec_dai, cpu_dai,
96 SND_SOC_DAIFMT_IB_NF |
97 SND_SOC_DAIFMT_CBS_CFS);
100 static int omap3pandora_in_hw_params(struct snd_pcm_substream *substream,
101 struct snd_pcm_hw_params *params)
103 struct snd_soc_pcm_runtime *rtd = substream->private_data;
104 struct snd_soc_dai *codec_dai = rtd->dai->codec_dai;
105 struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
107 return omap3pandora_cmn_hw_params(codec_dai, cpu_dai,
109 SND_SOC_DAIFMT_NB_NF |
110 SND_SOC_DAIFMT_CBS_CFS);
113 static int omap3pandora_hp_event(struct snd_soc_dapm_widget *w,
114 struct snd_kcontrol *k, int event)
116 if (SND_SOC_DAPM_EVENT_ON(event)) {
117 gpio_set_value(OMAP3_PANDORA_DAC_POWER_GPIO, 1);
118 gpio_set_value(OMAP3_PANDORA_AMP_POWER_GPIO, 1);
120 gpio_set_value(OMAP3_PANDORA_AMP_POWER_GPIO, 0);
122 gpio_set_value(OMAP3_PANDORA_DAC_POWER_GPIO, 0);
129 * Audio paths on Pandora board:
131 * |O| ---> PCM DAC +-> AMP -> Headphone Jack
132 * |M| A +--------> Line Out
134 * |P| <--- TWL4030 <--------- Line In and MICs
136 static const struct snd_soc_dapm_widget omap3pandora_out_dapm_widgets[] = {
137 SND_SOC_DAPM_DAC("PCM DAC", "Playback", SND_SOC_NOPM, 0, 0),
138 SND_SOC_DAPM_PGA_E("Headphone Amplifier", SND_SOC_NOPM,
139 0, 0, NULL, 0, omap3pandora_hp_event,
140 SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
141 SND_SOC_DAPM_HP("Headphone Jack", NULL),
142 SND_SOC_DAPM_LINE("Line Out", NULL),
145 static const struct snd_soc_dapm_widget omap3pandora_in_dapm_widgets[] = {
146 SND_SOC_DAPM_MIC("Mic (Internal)", NULL),
147 SND_SOC_DAPM_MIC("Mic (external)", NULL),
148 SND_SOC_DAPM_LINE("Line In", NULL),
151 static const struct snd_soc_dapm_route omap3pandora_out_map[] = {
152 {"Headphone Amplifier", NULL, "PCM DAC"},
153 {"Line Out", NULL, "PCM DAC"},
154 {"Headphone Jack", NULL, "Headphone Amplifier"},
157 static const struct snd_soc_dapm_route omap3pandora_in_map[] = {
158 {"INL", NULL, "Line In"},
159 {"INR", NULL, "Line In"},
160 {"INL", NULL, "Mic (Internal)"},
161 {"INR", NULL, "Mic (external)"},
164 static int omap3pandora_out_init(struct snd_soc_codec *codec)
168 ret = snd_soc_dapm_new_controls(codec, omap3pandora_out_dapm_widgets,
169 ARRAY_SIZE(omap3pandora_out_dapm_widgets));
173 snd_soc_dapm_add_routes(codec, omap3pandora_out_map,
174 ARRAY_SIZE(omap3pandora_out_map));
176 return snd_soc_dapm_sync(codec);
179 static int omap3pandora_in_init(struct snd_soc_codec *codec)
183 ret = snd_soc_dapm_new_controls(codec, omap3pandora_in_dapm_widgets,
184 ARRAY_SIZE(omap3pandora_in_dapm_widgets));
188 snd_soc_dapm_add_routes(codec, omap3pandora_in_map,
189 ARRAY_SIZE(omap3pandora_in_map));
191 return snd_soc_dapm_sync(codec);
194 static struct snd_soc_ops omap3pandora_out_ops = {
195 .hw_params = omap3pandora_out_hw_params,
198 static struct snd_soc_ops omap3pandora_in_ops = {
199 .hw_params = omap3pandora_in_hw_params,
202 /* Digital audio interface glue - connects codec <--> CPU */
203 static struct snd_soc_dai_link omap3pandora_dai[] = {
206 .stream_name = "HiFi Out",
207 .cpu_dai = &omap_mcbsp_dai[0],
208 .codec_dai = &twl4030_dai,
209 .ops = &omap3pandora_out_ops,
210 .init = omap3pandora_out_init,
213 .stream_name = "Line/Mic In",
214 .cpu_dai = &omap_mcbsp_dai[1],
215 .codec_dai = &twl4030_dai,
216 .ops = &omap3pandora_in_ops,
217 .init = omap3pandora_in_init,
222 static struct snd_soc_card snd_soc_card_omap3pandora = {
223 .name = "omap3pandora",
224 .platform = &omap_soc_platform,
225 .dai_link = omap3pandora_dai,
226 .num_links = ARRAY_SIZE(omap3pandora_dai),
229 /* Audio subsystem */
230 static struct snd_soc_device omap3pandora_snd_data = {
231 .card = &snd_soc_card_omap3pandora,
232 .codec_dev = &soc_codec_dev_twl4030,
235 static struct platform_device *omap3pandora_snd_device;
237 static int __init omap3pandora_soc_init(void)
241 if (!machine_is_omap3_pandora()) {
242 pr_debug(PREFIX "Not OMAP3 Pandora\n");
245 pr_info("OMAP3 Pandora SoC init\n");
247 ret = gpio_request(OMAP3_PANDORA_DAC_POWER_GPIO, "dac_power");
249 pr_err(PREFIX "Failed to get DAC power GPIO\n");
253 ret = gpio_direction_output(OMAP3_PANDORA_DAC_POWER_GPIO, 0);
255 pr_err(PREFIX "Failed to set DAC power GPIO direction\n");
259 ret = gpio_request(OMAP3_PANDORA_AMP_POWER_GPIO, "amp_power");
261 pr_err(PREFIX "Failed to get amp power GPIO\n");
265 ret = gpio_direction_output(OMAP3_PANDORA_AMP_POWER_GPIO, 0);
267 pr_err(PREFIX "Failed to set amp power GPIO direction\n");
271 omap3pandora_snd_device = platform_device_alloc("soc-audio", -1);
272 if (omap3pandora_snd_device == NULL) {
273 pr_err(PREFIX "Platform device allocation failed\n");
278 platform_set_drvdata(omap3pandora_snd_device, &omap3pandora_snd_data);
279 omap3pandora_snd_data.dev = &omap3pandora_snd_device->dev;
280 *(unsigned int *)omap_mcbsp_dai[0].private_data = 1; /* McBSP2 */
281 *(unsigned int *)omap_mcbsp_dai[1].private_data = 3; /* McBSP4 */
283 ret = platform_device_add(omap3pandora_snd_device);
285 pr_err(PREFIX "Unable to add platform device\n");
292 platform_device_put(omap3pandora_snd_device);
294 gpio_free(OMAP3_PANDORA_AMP_POWER_GPIO);
296 gpio_free(OMAP3_PANDORA_DAC_POWER_GPIO);
299 module_init(omap3pandora_soc_init);
301 static void __exit omap3pandora_soc_exit(void)
303 platform_device_unregister(omap3pandora_snd_device);
304 gpio_free(OMAP3_PANDORA_AMP_POWER_GPIO);
305 gpio_free(OMAP3_PANDORA_DAC_POWER_GPIO);
307 module_exit(omap3pandora_soc_exit);
309 MODULE_AUTHOR("Grazvydas Ignotas <notasas@gmail.com>");
310 MODULE_DESCRIPTION("ALSA SoC OMAP3 Pandora");
311 MODULE_LICENSE("GPL");