omap3pandora.c 8.7 KB

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  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. #include <linux/clk.h>
  22. #include <linux/platform_device.h>
  23. #include <linux/gpio.h>
  24. #include <linux/delay.h>
  25. #include <sound/core.h>
  26. #include <sound/pcm.h>
  27. #include <sound/soc.h>
  28. #include <sound/soc-dapm.h>
  29. #include <asm/mach-types.h>
  30. #include "omap-mcbsp.h"
  31. #include "omap-pcm.h"
  32. #include "../codecs/twl4030.h"
  33. #define OMAP3_PANDORA_DAC_POWER_GPIO 118
  34. #define OMAP3_PANDORA_AMP_POWER_GPIO 14
  35. #define PREFIX "ASoC omap3pandora: "
  36. static int omap3pandora_cmn_hw_params(struct snd_soc_dai *codec_dai,
  37. struct snd_soc_dai *cpu_dai, unsigned int fmt)
  38. {
  39. int ret;
  40. /* Set codec DAI configuration */
  41. ret = snd_soc_dai_set_fmt(codec_dai, fmt);
  42. if (ret < 0) {
  43. pr_err(PREFIX "can't set codec DAI configuration\n");
  44. return ret;
  45. }
  46. /* Set cpu DAI configuration */
  47. ret = snd_soc_dai_set_fmt(cpu_dai, fmt);
  48. if (ret < 0) {
  49. pr_err(PREFIX "can't set cpu DAI configuration\n");
  50. return ret;
  51. }
  52. /* Set the codec system clock for DAC and ADC */
  53. ret = snd_soc_dai_set_sysclk(codec_dai, 0, 26000000,
  54. SND_SOC_CLOCK_IN);
  55. if (ret < 0) {
  56. pr_err(PREFIX "can't set codec system clock\n");
  57. return ret;
  58. }
  59. /* Set McBSP clock to external */
  60. ret = snd_soc_dai_set_sysclk(cpu_dai, OMAP_MCBSP_SYSCLK_CLKS_EXT, 0,
  61. SND_SOC_CLOCK_IN);
  62. if (ret < 0) {
  63. pr_err(PREFIX "can't set cpu system clock\n");
  64. return ret;
  65. }
  66. ret = snd_soc_dai_set_clkdiv(cpu_dai, OMAP_MCBSP_CLKGDV, 8);
  67. if (ret < 0) {
  68. pr_err(PREFIX "can't set SRG clock divider\n");
  69. return ret;
  70. }
  71. return 0;
  72. }
  73. static int omap3pandora_out_hw_params(struct snd_pcm_substream *substream,
  74. struct snd_pcm_hw_params *params)
  75. {
  76. struct snd_soc_pcm_runtime *rtd = substream->private_data;
  77. struct snd_soc_dai *codec_dai = rtd->dai->codec_dai;
  78. struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
  79. return omap3pandora_cmn_hw_params(codec_dai, cpu_dai,
  80. SND_SOC_DAIFMT_I2S |
  81. SND_SOC_DAIFMT_IB_NF |
  82. SND_SOC_DAIFMT_CBS_CFS);
  83. }
  84. static int omap3pandora_in_hw_params(struct snd_pcm_substream *substream,
  85. struct snd_pcm_hw_params *params)
  86. {
  87. struct snd_soc_pcm_runtime *rtd = substream->private_data;
  88. struct snd_soc_dai *codec_dai = rtd->dai->codec_dai;
  89. struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
  90. return omap3pandora_cmn_hw_params(codec_dai, cpu_dai,
  91. SND_SOC_DAIFMT_I2S |
  92. SND_SOC_DAIFMT_NB_NF |
  93. SND_SOC_DAIFMT_CBS_CFS);
  94. }
  95. static int omap3pandora_hp_event(struct snd_soc_dapm_widget *w,
  96. struct snd_kcontrol *k, int event)
  97. {
  98. if (SND_SOC_DAPM_EVENT_ON(event)) {
  99. gpio_set_value(OMAP3_PANDORA_DAC_POWER_GPIO, 1);
  100. gpio_set_value(OMAP3_PANDORA_AMP_POWER_GPIO, 1);
  101. } else {
  102. gpio_set_value(OMAP3_PANDORA_AMP_POWER_GPIO, 0);
  103. mdelay(1);
  104. gpio_set_value(OMAP3_PANDORA_DAC_POWER_GPIO, 0);
  105. }
  106. return 0;
  107. }
  108. /*
  109. * Audio paths on Pandora board:
  110. *
  111. * |O| ---> PCM DAC +-> AMP -> Headphone Jack
  112. * |M| A +--------> Line Out
  113. * |A| <~~clk~~+
  114. * |P| <--- TWL4030 <--------- Line In and MICs
  115. */
  116. static const struct snd_soc_dapm_widget omap3pandora_out_dapm_widgets[] = {
  117. SND_SOC_DAPM_DAC("PCM DAC", "Playback", SND_SOC_NOPM, 0, 0),
  118. SND_SOC_DAPM_PGA_E("Headphone Amplifier", SND_SOC_NOPM,
  119. 0, 0, NULL, 0, omap3pandora_hp_event,
  120. SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
  121. SND_SOC_DAPM_HP("Headphone Jack", NULL),
  122. SND_SOC_DAPM_LINE("Line Out", NULL),
  123. };
  124. static const struct snd_soc_dapm_widget omap3pandora_in_dapm_widgets[] = {
  125. SND_SOC_DAPM_MIC("Mic (Internal)", NULL),
  126. SND_SOC_DAPM_MIC("Mic (external)", NULL),
  127. SND_SOC_DAPM_LINE("Line In", NULL),
  128. };
  129. static const struct snd_soc_dapm_route omap3pandora_out_map[] = {
  130. {"Headphone Amplifier", NULL, "PCM DAC"},
  131. {"Line Out", NULL, "PCM DAC"},
  132. {"Headphone Jack", NULL, "Headphone Amplifier"},
  133. };
  134. static const struct snd_soc_dapm_route omap3pandora_in_map[] = {
  135. {"INL", NULL, "Line In"},
  136. {"INR", NULL, "Line In"},
  137. {"INL", NULL, "Mic (Internal)"},
  138. {"INR", NULL, "Mic (external)"},
  139. };
  140. static int omap3pandora_out_init(struct snd_soc_codec *codec)
  141. {
  142. int ret;
  143. ret = snd_soc_dapm_new_controls(codec, omap3pandora_out_dapm_widgets,
  144. ARRAY_SIZE(omap3pandora_out_dapm_widgets));
  145. if (ret < 0)
  146. return ret;
  147. snd_soc_dapm_add_routes(codec, omap3pandora_out_map,
  148. ARRAY_SIZE(omap3pandora_out_map));
  149. return snd_soc_dapm_sync(codec);
  150. }
  151. static int omap3pandora_in_init(struct snd_soc_codec *codec)
  152. {
  153. int ret;
  154. /* All TWL4030 output pins are floating */
  155. snd_soc_dapm_nc_pin(codec, "OUTL"),
  156. snd_soc_dapm_nc_pin(codec, "OUTR"),
  157. snd_soc_dapm_nc_pin(codec, "EARPIECE"),
  158. snd_soc_dapm_nc_pin(codec, "PREDRIVEL"),
  159. snd_soc_dapm_nc_pin(codec, "PREDRIVER"),
  160. snd_soc_dapm_nc_pin(codec, "HSOL"),
  161. snd_soc_dapm_nc_pin(codec, "HSOR"),
  162. snd_soc_dapm_nc_pin(codec, "CARKITL"),
  163. snd_soc_dapm_nc_pin(codec, "CARKITR"),
  164. snd_soc_dapm_nc_pin(codec, "HFL"),
  165. snd_soc_dapm_nc_pin(codec, "HFR"),
  166. ret = snd_soc_dapm_new_controls(codec, omap3pandora_in_dapm_widgets,
  167. ARRAY_SIZE(omap3pandora_in_dapm_widgets));
  168. if (ret < 0)
  169. return ret;
  170. snd_soc_dapm_add_routes(codec, omap3pandora_in_map,
  171. ARRAY_SIZE(omap3pandora_in_map));
  172. return snd_soc_dapm_sync(codec);
  173. }
  174. static struct snd_soc_ops omap3pandora_out_ops = {
  175. .hw_params = omap3pandora_out_hw_params,
  176. };
  177. static struct snd_soc_ops omap3pandora_in_ops = {
  178. .hw_params = omap3pandora_in_hw_params,
  179. };
  180. /* Digital audio interface glue - connects codec <--> CPU */
  181. static struct snd_soc_dai_link omap3pandora_dai[] = {
  182. {
  183. .name = "PCM1773",
  184. .stream_name = "HiFi Out",
  185. .cpu_dai = &omap_mcbsp_dai[0],
  186. .codec_dai = &twl4030_dai,
  187. .ops = &omap3pandora_out_ops,
  188. .init = omap3pandora_out_init,
  189. }, {
  190. .name = "TWL4030",
  191. .stream_name = "Line/Mic In",
  192. .cpu_dai = &omap_mcbsp_dai[1],
  193. .codec_dai = &twl4030_dai,
  194. .ops = &omap3pandora_in_ops,
  195. .init = omap3pandora_in_init,
  196. }
  197. };
  198. /* SoC card */
  199. static struct snd_soc_card snd_soc_card_omap3pandora = {
  200. .name = "omap3pandora",
  201. .platform = &omap_soc_platform,
  202. .dai_link = omap3pandora_dai,
  203. .num_links = ARRAY_SIZE(omap3pandora_dai),
  204. };
  205. /* Audio subsystem */
  206. static struct snd_soc_device omap3pandora_snd_data = {
  207. .card = &snd_soc_card_omap3pandora,
  208. .codec_dev = &soc_codec_dev_twl4030,
  209. };
  210. static struct platform_device *omap3pandora_snd_device;
  211. static int __init omap3pandora_soc_init(void)
  212. {
  213. int ret;
  214. if (!machine_is_omap3_pandora()) {
  215. pr_debug(PREFIX "Not OMAP3 Pandora\n");
  216. return -ENODEV;
  217. }
  218. pr_info("OMAP3 Pandora SoC init\n");
  219. ret = gpio_request(OMAP3_PANDORA_DAC_POWER_GPIO, "dac_power");
  220. if (ret) {
  221. pr_err(PREFIX "Failed to get DAC power GPIO\n");
  222. return ret;
  223. }
  224. ret = gpio_direction_output(OMAP3_PANDORA_DAC_POWER_GPIO, 0);
  225. if (ret) {
  226. pr_err(PREFIX "Failed to set DAC power GPIO direction\n");
  227. goto fail0;
  228. }
  229. ret = gpio_request(OMAP3_PANDORA_AMP_POWER_GPIO, "amp_power");
  230. if (ret) {
  231. pr_err(PREFIX "Failed to get amp power GPIO\n");
  232. goto fail0;
  233. }
  234. ret = gpio_direction_output(OMAP3_PANDORA_AMP_POWER_GPIO, 0);
  235. if (ret) {
  236. pr_err(PREFIX "Failed to set amp power GPIO direction\n");
  237. goto fail1;
  238. }
  239. omap3pandora_snd_device = platform_device_alloc("soc-audio", -1);
  240. if (omap3pandora_snd_device == NULL) {
  241. pr_err(PREFIX "Platform device allocation failed\n");
  242. ret = -ENOMEM;
  243. goto fail1;
  244. }
  245. platform_set_drvdata(omap3pandora_snd_device, &omap3pandora_snd_data);
  246. omap3pandora_snd_data.dev = &omap3pandora_snd_device->dev;
  247. *(unsigned int *)omap_mcbsp_dai[0].private_data = 1; /* McBSP2 */
  248. *(unsigned int *)omap_mcbsp_dai[1].private_data = 3; /* McBSP4 */
  249. ret = platform_device_add(omap3pandora_snd_device);
  250. if (ret) {
  251. pr_err(PREFIX "Unable to add platform device\n");
  252. goto fail2;
  253. }
  254. return 0;
  255. fail2:
  256. platform_device_put(omap3pandora_snd_device);
  257. fail1:
  258. gpio_free(OMAP3_PANDORA_AMP_POWER_GPIO);
  259. fail0:
  260. gpio_free(OMAP3_PANDORA_DAC_POWER_GPIO);
  261. return ret;
  262. }
  263. module_init(omap3pandora_soc_init);
  264. static void __exit omap3pandora_soc_exit(void)
  265. {
  266. platform_device_unregister(omap3pandora_snd_device);
  267. gpio_free(OMAP3_PANDORA_AMP_POWER_GPIO);
  268. gpio_free(OMAP3_PANDORA_DAC_POWER_GPIO);
  269. }
  270. module_exit(omap3pandora_soc_exit);
  271. MODULE_AUTHOR("Grazvydas Ignotas <notasas@gmail.com>");
  272. MODULE_DESCRIPTION("ALSA SoC OMAP3 Pandora");
  273. MODULE_LICENSE("GPL");