1 files changed, 311 insertions, 0 deletions

diff --git a/sound/soc/omap/omap3pandora.c b/sound/soc/omap/omap3pandora.c
new file mode 100644
index 000000000000..bd91594496b1
--- /dev/null
+++ b/sound/soc/omap/omap3pandora.c
@@ -0,0 +1,311 @@
+/*
+ * omap3pandora.c  --  SoC audio for Pandora Handheld Console
+ *
+ * Author: Gražvydas 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 <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/soc.h>
+#include <sound/soc-dapm.h>
+
+#include <asm/mach-types.h>
+
+#include "omap-mcbsp.h"
+#include "omap-pcm.h"
+#include "../codecs/twl4030.h"
+
+#define OMAP3_PANDORA_DAC_POWER_GPIO    118
+#define OMAP3_PANDORA_AMP_POWER_GPIO    14
+
+#define PREFIX "ASoC omap3pandora: "
+
+static int omap3pandora_cmn_hw_params(struct snd_soc_dai *codec_dai,
+        struct snd_soc_dai *cpu_dai, unsigned int fmt)
+{
+        int ret;
+
+        /* Set codec DAI configuration */
+        ret = snd_soc_dai_set_fmt(codec_dai, fmt);
+        if (ret < 0) {
+                pr_err(PREFIX "can't set codec DAI configuration\n");
+                return ret;
+        }
+
+        /* Set cpu DAI configuration */
+        ret = snd_soc_dai_set_fmt(cpu_dai, fmt);
+        if (ret < 0) {
+                pr_err(PREFIX "can't set cpu DAI configuration\n");
+                return 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, 0,
+                                            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_out_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->dai->codec_dai;
+        struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
+
+        return omap3pandora_cmn_hw_params(codec_dai, cpu_dai,
+                                          SND_SOC_DAIFMT_I2S |
+                                          SND_SOC_DAIFMT_IB_NF |
+                                          SND_SOC_DAIFMT_CBS_CFS);
+}
+
+static int omap3pandora_in_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->dai->codec_dai;
+        struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
+
+        return omap3pandora_cmn_hw_params(codec_dai, cpu_dai,
+                                          SND_SOC_DAIFMT_I2S |
+                                          SND_SOC_DAIFMT_NB_NF |
+                                          SND_SOC_DAIFMT_CBS_CFS);
+}
+
+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_DAC_POWER_GPIO, 1);
+                gpio_set_value(OMAP3_PANDORA_AMP_POWER_GPIO, 1);
+        } else {
+                gpio_set_value(OMAP3_PANDORA_AMP_POWER_GPIO, 0);
+                mdelay(1);
+                gpio_set_value(OMAP3_PANDORA_DAC_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_out_dapm_widgets[] = {
+        SND_SOC_DAPM_DAC("PCM DAC", "Playback", SND_SOC_NOPM, 0, 0),
+        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),
+};
+
+static const struct snd_soc_dapm_widget omap3pandora_in_dapm_widgets[] = {
+        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_out_map[] = {
+        {"Headphone Amplifier", NULL, "PCM DAC"},
+        {"Line Out", NULL, "PCM DAC"},
+        {"Headphone Jack", NULL, "Headphone Amplifier"},
+};
+
+static const struct snd_soc_dapm_route omap3pandora_in_map[] = {
+        {"INL", NULL, "Line In"},
+        {"INR", NULL, "Line In"},
+        {"INL", NULL, "Mic (Internal)"},
+        {"INR", NULL, "Mic (external)"},
+};
+
+static int omap3pandora_out_init(struct snd_soc_codec *codec)
+{
+        int ret;
+
+        ret = snd_soc_dapm_new_controls(codec, omap3pandora_out_dapm_widgets,
+                                ARRAY_SIZE(omap3pandora_out_dapm_widgets));
+        if (ret < 0)
+                return ret;
+
+        snd_soc_dapm_add_routes(codec, omap3pandora_out_map,
+                ARRAY_SIZE(omap3pandora_out_map));
+
+        return snd_soc_dapm_sync(codec);
+}
+
+static int omap3pandora_in_init(struct snd_soc_codec *codec)
+{
+        int ret;
+
+        ret = snd_soc_dapm_new_controls(codec, omap3pandora_in_dapm_widgets,
+                                ARRAY_SIZE(omap3pandora_in_dapm_widgets));
+        if (ret < 0)
+                return ret;
+
+        snd_soc_dapm_add_routes(codec, omap3pandora_in_map,
+                ARRAY_SIZE(omap3pandora_in_map));
+
+        return snd_soc_dapm_sync(codec);
+}
+
+static struct snd_soc_ops omap3pandora_out_ops = {
+        .hw_params = omap3pandora_out_hw_params,
+};
+
+static struct snd_soc_ops omap3pandora_in_ops = {
+        .hw_params = omap3pandora_in_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 = &omap_mcbsp_dai[0],
+                .codec_dai = &twl4030_dai,
+                .ops = &omap3pandora_out_ops,
+                .init = omap3pandora_out_init,
+        }, {
+                .name = "TWL4030",
+                .stream_name = "Line/Mic In",
+                .cpu_dai = &omap_mcbsp_dai[1],
+                .codec_dai = &twl4030_dai,
+                .ops = &omap3pandora_in_ops,
+                .init = omap3pandora_in_init,
+        }
+};
+
+/* SoC card */
+static struct snd_soc_card snd_soc_card_omap3pandora = {
+        .name = "omap3pandora",
+        .platform = &omap_soc_platform,
+        .dai_link = omap3pandora_dai,
+        .num_links = ARRAY_SIZE(omap3pandora_dai),
+};
+
+/* Audio subsystem */
+static struct snd_soc_device omap3pandora_snd_data = {
+        .card = &snd_soc_card_omap3pandora,
+        .codec_dev = &soc_codec_dev_twl4030,
+};
+
+static struct platform_device *omap3pandora_snd_device;
+
+static int __init omap3pandora_soc_init(void)
+{
+        int ret;
+
+        if (!machine_is_omap3_pandora()) {
+                pr_debug(PREFIX "Not OMAP3 Pandora\n");
+                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, &omap3pandora_snd_data);
+        omap3pandora_snd_data.dev = &omap3pandora_snd_device->dev;
+        *(unsigned int *)omap_mcbsp_dai[0].private_data = 1; /* McBSP2 */
+        *(unsigned int *)omap_mcbsp_dai[1].private_data = 3; /* McBSP4 */
+
+        ret = platform_device_add(omap3pandora_snd_device);
+        if (ret) {
+                pr_err(PREFIX "Unable to add platform device\n");
+                goto fail2;
+        }
+
+        return 0;
+
+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)
+{
+        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");