--- /dev/null
+/*
+ * omap3pandora.c -- SoC audio for Pandora Handheld Console
+ *
+ * Author: GraÅžvydas Ignotas <notasas@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ *
+ */
+
+#include <linux/clk.h>
+#include <linux/platform_device.h>
+#include <linux/gpio.h>
+#include <linux/delay.h>
+#include <linux/regulator/consumer.h>
+#include <linux/module.h>
+
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/soc.h>
+
+#include <asm/mach-types.h>
+#include <linux/platform_data/asoc-ti-mcbsp.h>
+
+#include "omap-mcbsp.h"
+
+#define OMAP3_PANDORA_DAC_POWER_GPIO 118
+#define OMAP3_PANDORA_AMP_POWER_GPIO 14
+
+#define PREFIX "ASoC omap3pandora: "
+
+static struct regulator *omap3pandora_dac_reg;
+
+static int omap3pandora_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct snd_soc_dai *codec_dai = rtd->codec_dai;
+ struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+ int ret;
+
+ /* Set the codec system clock for DAC and ADC */
+ ret = snd_soc_dai_set_sysclk(codec_dai, 0, 26000000,
+ SND_SOC_CLOCK_IN);
+ if (ret < 0) {
+ pr_err(PREFIX "can't set codec system clock\n");
+ return ret;
+ }
+
+ /* Set McBSP clock to external */
+ ret = snd_soc_dai_set_sysclk(cpu_dai, OMAP_MCBSP_SYSCLK_CLKS_EXT,
+ 256 * params_rate(params),
+ SND_SOC_CLOCK_IN);
+ if (ret < 0) {
+ pr_err(PREFIX "can't set cpu system clock\n");
+ return ret;
+ }
+
+ ret = snd_soc_dai_set_clkdiv(cpu_dai, OMAP_MCBSP_CLKGDV, 8);
+ if (ret < 0) {
+ pr_err(PREFIX "can't set SRG clock divider\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+static int omap3pandora_dac_event(struct snd_soc_dapm_widget *w,
+ struct snd_kcontrol *k, int event)
+{
+ int ret;
+
+ /*
+ * The PCM1773 DAC datasheet requires 1ms delay between switching
+ * VCC power on/off and /PD pin high/low
+ */
+ if (SND_SOC_DAPM_EVENT_ON(event)) {
+ ret = regulator_enable(omap3pandora_dac_reg);
+ if (ret) {
+ dev_err(w->dapm->dev, "Failed to power DAC: %d\n", ret);
+ return ret;
+ }
+ mdelay(1);
+ gpio_set_value(OMAP3_PANDORA_DAC_POWER_GPIO, 1);
+ } else {
+ gpio_set_value(OMAP3_PANDORA_DAC_POWER_GPIO, 0);
+ mdelay(1);
+ regulator_disable(omap3pandora_dac_reg);
+ }
+
+ return 0;
+}
+
+static int omap3pandora_hp_event(struct snd_soc_dapm_widget *w,
+ struct snd_kcontrol *k, int event)
+{
+ if (SND_SOC_DAPM_EVENT_ON(event))
+ gpio_set_value(OMAP3_PANDORA_AMP_POWER_GPIO, 1);
+ else
+ gpio_set_value(OMAP3_PANDORA_AMP_POWER_GPIO, 0);
+
+ return 0;
+}
+
+/*
+ * Audio paths on Pandora board:
+ *
+ * |O| ---> PCM DAC +-> AMP -> Headphone Jack
+ * |M| A +--------> Line Out
+ * |A| <~~clk~~+
+ * |P| <--- TWL4030 <--------- Line In and MICs
+ */
+static const struct snd_soc_dapm_widget omap3pandora_dapm_widgets[] = {
+ SND_SOC_DAPM_DAC_E("PCM DAC", "HiFi Playback", SND_SOC_NOPM,
+ 0, 0, omap3pandora_dac_event,
+ SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
+ SND_SOC_DAPM_PGA_E("Headphone Amplifier", SND_SOC_NOPM,
+ 0, 0, NULL, 0, omap3pandora_hp_event,
+ SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
+ SND_SOC_DAPM_HP("Headphone Jack", NULL),
+ SND_SOC_DAPM_LINE("Line Out", NULL),
+
+ SND_SOC_DAPM_MIC("Mic (internal)", NULL),
+ SND_SOC_DAPM_MIC("Mic (external)", NULL),
+ SND_SOC_DAPM_LINE("Line In", NULL),
+};
+
+static const struct snd_soc_dapm_route omap3pandora_map[] = {
+ {"PCM DAC", NULL, "APLL Enable"},
+ {"Headphone Amplifier", NULL, "PCM DAC"},
+ {"Line Out", NULL, "PCM DAC"},
+ {"Headphone Jack", NULL, "Headphone Amplifier"},
+
+ {"AUXL", NULL, "Line In"},
+ {"AUXR", NULL, "Line In"},
+
+ {"MAINMIC", NULL, "Mic (internal)"},
+ {"Mic (internal)", NULL, "Mic Bias 1"},
+
+ {"SUBMIC", NULL, "Mic (external)"},
+ {"Mic (external)", NULL, "Mic Bias 2"},
+};
+
+static int omap3pandora_out_init(struct snd_soc_pcm_runtime *rtd)
+{
+ struct snd_soc_codec *codec = rtd->codec;
+ struct snd_soc_dapm_context *dapm = &codec->dapm;
+
+ /* All TWL4030 output pins are floating */
+ snd_soc_dapm_nc_pin(dapm, "EARPIECE");
+ snd_soc_dapm_nc_pin(dapm, "PREDRIVEL");
+ snd_soc_dapm_nc_pin(dapm, "PREDRIVER");
+ snd_soc_dapm_nc_pin(dapm, "HSOL");
+ snd_soc_dapm_nc_pin(dapm, "HSOR");
+ snd_soc_dapm_nc_pin(dapm, "CARKITL");
+ snd_soc_dapm_nc_pin(dapm, "CARKITR");
+ snd_soc_dapm_nc_pin(dapm, "HFL");
+ snd_soc_dapm_nc_pin(dapm, "HFR");
+ snd_soc_dapm_nc_pin(dapm, "VIBRA");
+
+ return 0;
+}
+
+static int omap3pandora_in_init(struct snd_soc_pcm_runtime *rtd)
+{
+ struct snd_soc_codec *codec = rtd->codec;
+ struct snd_soc_dapm_context *dapm = &codec->dapm;
+
+ /* Not comnnected */
+ snd_soc_dapm_nc_pin(dapm, "HSMIC");
+ snd_soc_dapm_nc_pin(dapm, "CARKITMIC");
+ snd_soc_dapm_nc_pin(dapm, "DIGIMIC0");
+ snd_soc_dapm_nc_pin(dapm, "DIGIMIC1");
+
+ return 0;
+}
+
+static struct snd_soc_ops omap3pandora_ops = {
+ .hw_params = omap3pandora_hw_params,
+};
+
+/* Digital audio interface glue - connects codec <--> CPU */
+static struct snd_soc_dai_link omap3pandora_dai[] = {
+ {
+ .name = "PCM1773",
+ .stream_name = "HiFi Out",
+ .cpu_dai_name = "omap-mcbsp.2",
+ .codec_dai_name = "twl4030-hifi",
+ .platform_name = "omap-mcbsp.2",
+ .codec_name = "twl4030-codec",
+ .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
+ SND_SOC_DAIFMT_CBS_CFS,
+ .ops = &omap3pandora_ops,
+ .init = omap3pandora_out_init,
+ }, {
+ .name = "TWL4030",
+ .stream_name = "Line/Mic In",
+ .cpu_dai_name = "omap-mcbsp.4",
+ .codec_dai_name = "twl4030-hifi",
+ .platform_name = "omap-mcbsp.4",
+ .codec_name = "twl4030-codec",
+ .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
+ SND_SOC_DAIFMT_CBS_CFS,
+ .ops = &omap3pandora_ops,
+ .init = omap3pandora_in_init,
+ }
+};
+
+/* SoC card */
+static struct snd_soc_card snd_soc_card_omap3pandora = {
+ .name = "omap3pandora",
+ .owner = THIS_MODULE,
+ .dai_link = omap3pandora_dai,
+ .num_links = ARRAY_SIZE(omap3pandora_dai),
+
+ .dapm_widgets = omap3pandora_dapm_widgets,
+ .num_dapm_widgets = ARRAY_SIZE(omap3pandora_dapm_widgets),
+ .dapm_routes = omap3pandora_map,
+ .num_dapm_routes = ARRAY_SIZE(omap3pandora_map),
+};
+
+static struct platform_device *omap3pandora_snd_device;
+
+static int __init omap3pandora_soc_init(void)
+{
+ int ret;
+
+ if (!machine_is_omap3_pandora())
+ return -ENODEV;
+
+ pr_info("OMAP3 Pandora SoC init\n");
+
+ ret = gpio_request(OMAP3_PANDORA_DAC_POWER_GPIO, "dac_power");
+ if (ret) {
+ pr_err(PREFIX "Failed to get DAC power GPIO\n");
+ return ret;
+ }
+
+ ret = gpio_direction_output(OMAP3_PANDORA_DAC_POWER_GPIO, 0);
+ if (ret) {
+ pr_err(PREFIX "Failed to set DAC power GPIO direction\n");
+ goto fail0;
+ }
+
+ ret = gpio_request(OMAP3_PANDORA_AMP_POWER_GPIO, "amp_power");
+ if (ret) {
+ pr_err(PREFIX "Failed to get amp power GPIO\n");
+ goto fail0;
+ }
+
+ ret = gpio_direction_output(OMAP3_PANDORA_AMP_POWER_GPIO, 0);
+ if (ret) {
+ pr_err(PREFIX "Failed to set amp power GPIO direction\n");
+ goto fail1;
+ }
+
+ omap3pandora_snd_device = platform_device_alloc("soc-audio", -1);
+ if (omap3pandora_snd_device == NULL) {
+ pr_err(PREFIX "Platform device allocation failed\n");
+ ret = -ENOMEM;
+ goto fail1;
+ }
+
+ platform_set_drvdata(omap3pandora_snd_device, &snd_soc_card_omap3pandora);
+
+ ret = platform_device_add(omap3pandora_snd_device);
+ if (ret) {
+ pr_err(PREFIX "Unable to add platform device\n");
+ goto fail2;
+ }
+
+ omap3pandora_dac_reg = regulator_get(&omap3pandora_snd_device->dev, "vcc");
+ if (IS_ERR(omap3pandora_dac_reg)) {
+ pr_err(PREFIX "Failed to get DAC regulator from %s: %ld\n",
+ dev_name(&omap3pandora_snd_device->dev),
+ PTR_ERR(omap3pandora_dac_reg));
+ ret = PTR_ERR(omap3pandora_dac_reg);
+ goto fail3;
+ }
+
+ return 0;
+
+fail3:
+ platform_device_del(omap3pandora_snd_device);
+fail2:
+ platform_device_put(omap3pandora_snd_device);
+fail1:
+ gpio_free(OMAP3_PANDORA_AMP_POWER_GPIO);
+fail0:
+ gpio_free(OMAP3_PANDORA_DAC_POWER_GPIO);
+ return ret;
+}
+module_init(omap3pandora_soc_init);
+
+static void __exit omap3pandora_soc_exit(void)
+{
+ regulator_put(omap3pandora_dac_reg);
+ platform_device_unregister(omap3pandora_snd_device);
+ gpio_free(OMAP3_PANDORA_AMP_POWER_GPIO);
+ gpio_free(OMAP3_PANDORA_DAC_POWER_GPIO);
+}
+module_exit(omap3pandora_soc_exit);
+
+MODULE_AUTHOR("Grazvydas Ignotas <notasas@gmail.com>");
+MODULE_DESCRIPTION("ALSA SoC OMAP3 Pandora");
+MODULE_LICENSE("GPL");
Code Review / kvmfornfv.git / blobdiff