ASoC: omap: Add basic audio support for Nokia RX-51/N900

This patch adds support for integrated stereo speakers and digital
microphone found on Nokia RX-51 hardware. This is a cut down version based
on Maemo kernel sources and earlier patchset by Eduardo Valentin et al.

http://mailman.alsa-project.org/pipermail/alsa-devel/2009-October/022033.html

Signed-off-by: Jarkko Nikula <jhnikula@gmail.com>
Cc: Eduardo Valentin <eduardo.valentin@nokia.com>
Cc: Peter Ujfalusi <peter.ujfalusi@nokia.com>
Acked-by: Eduardo Valentin <eduardo.valentin@nokia.com>
Acked-by: Peter Ujfalusi <peter.ujfalusi@nokia.com>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>

3 files changed, 306 insertions, 0 deletions

diff --git a/sound/soc/omap/Kconfig b/sound/soc/omap/Kconfig
index f11963c21873..83be4a76d2bb 100644
--- a/sound/soc/omap/Kconfig
+++ b/sound/soc/omap/Kconfig
@@ -18,6 +18,16 @@ config SND_OMAP_SOC_N810
         help
           Say Y if you want to add support for SoC audio on Nokia N810.
 
+config SND_OMAP_SOC_RX51
+        tristate "SoC Audio support for Nokia RX-51"
+        depends on SND_OMAP_SOC && MACH_NOKIA_RX51
+        select OMAP_MCBSP
+        select SND_OMAP_SOC_MCBSP
+        select SND_SOC_TLV320AIC3X
+        help
+          Say Y if you want to add support for SoC audio on Nokia RX-51
+          hardware. This is also known as Nokia N900 product.
+
 config SND_OMAP_SOC_AMS_DELTA
         tristate "SoC Audio support for Amstrad E3 (Delta) videophone"
         depends on SND_OMAP_SOC && MACH_AMS_DELTA
diff --git a/sound/soc/omap/Makefile b/sound/soc/omap/Makefile
index 0bc00ca14b37..3a75755f25e4 100644
--- a/sound/soc/omap/Makefile
+++ b/sound/soc/omap/Makefile
@@ -9,6 +9,7 @@ obj-$(CONFIG_SND_OMAP_SOC_MCPDM) += snd-soc-omap-mcpdm.o
 
 # OMAP Machine Support
 snd-soc-n810-objs := n810.o
+snd-soc-rx51-objs := rx51.o
 snd-soc-ams-delta-objs := ams-delta.o
 snd-soc-osk5912-objs := osk5912.o
 snd-soc-overo-objs := overo.o
@@ -22,6 +23,7 @@ snd-soc-zoom2-objs := zoom2.o
 snd-soc-igep0020-objs := igep0020.o
 
 obj-$(CONFIG_SND_OMAP_SOC_N810) += snd-soc-n810.o
+obj-$(CONFIG_SND_OMAP_SOC_RX51) += snd-soc-rx51.o
 obj-$(CONFIG_SND_OMAP_SOC_AMS_DELTA) += snd-soc-ams-delta.o
 obj-$(CONFIG_SND_OMAP_SOC_OSK5912) += snd-soc-osk5912.o
 obj-$(CONFIG_SND_OMAP_SOC_OVERO) += snd-soc-overo.o
diff --git a/sound/soc/omap/rx51.c b/sound/soc/omap/rx51.c
new file mode 100644
index 000000000000..47d831ef2dbb
--- /dev/null
+++ b/sound/soc/omap/rx51.c
@@ -0,0 +1,294 @@
+/*
+ * rx51.c  --  SoC audio for Nokia RX-51
+ *
+ * Copyright (C) 2008 - 2009 Nokia Corporation
+ *
+ * Contact: Peter Ujfalusi <peter.ujfalusi@nokia.com>
+ *          Eduardo Valentin <eduardo.valentin@nokia.com>
+ *          Jarkko Nikula <jhnikula@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/delay.h>
+#include <linux/gpio.h>
+#include <linux/platform_device.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/tlv320aic3x.h"
+
+/*
+ * REVISIT: TWL4030 GPIO base in RX-51. Now statically defined to 192. This
+ * gpio is reserved in arch/arm/mach-omap2/board-rx51-peripherals.c
+ */
+#define RX51_SPEAKER_AMP_TWL_GPIO       (192 + 7)
+
+static int rx51_spk_func;
+static int rx51_dmic_func;
+
+static void rx51_ext_control(struct snd_soc_codec *codec)
+{
+        if (rx51_spk_func)
+                snd_soc_dapm_enable_pin(codec, "Ext Spk");
+        else
+                snd_soc_dapm_disable_pin(codec, "Ext Spk");
+        if (rx51_dmic_func)
+                snd_soc_dapm_enable_pin(codec, "DMic");
+        else
+                snd_soc_dapm_disable_pin(codec, "DMic");
+
+        snd_soc_dapm_sync(codec);
+}
+
+static int rx51_startup(struct snd_pcm_substream *substream)
+{
+        struct snd_pcm_runtime *runtime = substream->runtime;
+        struct snd_soc_pcm_runtime *rtd = substream->private_data;
+        struct snd_soc_codec *codec = rtd->socdev->card->codec;
+
+        snd_pcm_hw_constraint_minmax(runtime,
+                                     SNDRV_PCM_HW_PARAM_CHANNELS, 2, 2);
+        rx51_ext_control(codec);
+
+        return 0;
+}
+
+static int rx51_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;
+        int err;
+
+        /* Set codec DAI configuration */
+        err = snd_soc_dai_set_fmt(codec_dai,
+                                  SND_SOC_DAIFMT_DSP_A |
+                                  SND_SOC_DAIFMT_IB_NF |
+                                  SND_SOC_DAIFMT_CBM_CFM);
+        if (err < 0)
+                return err;
+
+        /* Set cpu DAI configuration */
+        err = snd_soc_dai_set_fmt(cpu_dai,
+                                  SND_SOC_DAIFMT_DSP_A |
+                                  SND_SOC_DAIFMT_IB_NF |
+                                  SND_SOC_DAIFMT_CBM_CFM);
+        if (err < 0)
+                return err;
+
+        /* Set the codec system clock for DAC and ADC */
+        return snd_soc_dai_set_sysclk(codec_dai, 0, 19200000,
+                                      SND_SOC_CLOCK_IN);
+}
+
+static struct snd_soc_ops rx51_ops = {
+        .startup = rx51_startup,
+        .hw_params = rx51_hw_params,
+};
+
+static int rx51_get_spk(struct snd_kcontrol *kcontrol,
+                        struct snd_ctl_elem_value *ucontrol)
+{
+        ucontrol->value.integer.value[0] = rx51_spk_func;
+
+        return 0;
+}
+
+static int rx51_set_spk(struct snd_kcontrol *kcontrol,
+                        struct snd_ctl_elem_value *ucontrol)
+{
+        struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
+
+        if (rx51_spk_func == ucontrol->value.integer.value[0])
+                return 0;
+
+        rx51_spk_func = ucontrol->value.integer.value[0];
+        rx51_ext_control(codec);
+
+        return 1;
+}
+
+static int rx51_spk_event(struct snd_soc_dapm_widget *w,
+                          struct snd_kcontrol *k, int event)
+{
+        if (SND_SOC_DAPM_EVENT_ON(event))
+                gpio_set_value(RX51_SPEAKER_AMP_TWL_GPIO, 1);
+        else
+                gpio_set_value(RX51_SPEAKER_AMP_TWL_GPIO, 0);
+
+        return 0;
+}
+
+static int rx51_get_input(struct snd_kcontrol *kcontrol,
+                          struct snd_ctl_elem_value *ucontrol)
+{
+        ucontrol->value.integer.value[0] = rx51_dmic_func;
+
+        return 0;
+}
+
+static int rx51_set_input(struct snd_kcontrol *kcontrol,
+                          struct snd_ctl_elem_value *ucontrol)
+{
+        struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
+
+        if (rx51_dmic_func == ucontrol->value.integer.value[0])
+                return 0;
+
+        rx51_dmic_func = ucontrol->value.integer.value[0];
+        rx51_ext_control(codec);
+
+        return 1;
+}
+
+static const struct snd_soc_dapm_widget aic34_dapm_widgets[] = {
+        SND_SOC_DAPM_SPK("Ext Spk", rx51_spk_event),
+        SND_SOC_DAPM_MIC("DMic", NULL),
+};
+
+static const struct snd_soc_dapm_route audio_map[] = {
+        {"Ext Spk", NULL, "HPLOUT"},
+        {"Ext Spk", NULL, "HPROUT"},
+
+        {"DMic Rate 64", NULL, "Mic Bias 2V"},
+        {"Mic Bias 2V", NULL, "DMic"},
+};
+
+static const char *spk_function[] = {"Off", "On"};
+static const char *input_function[] = {"ADC", "Digital Mic"};
+
+static const struct soc_enum rx51_enum[] = {
+        SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(spk_function), spk_function),
+        SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(input_function), input_function),
+};
+
+static const struct snd_kcontrol_new aic34_rx51_controls[] = {
+        SOC_ENUM_EXT("Speaker Function", rx51_enum[0],
+                     rx51_get_spk, rx51_set_spk),
+        SOC_ENUM_EXT("Input Select",  rx51_enum[1],
+                     rx51_get_input, rx51_set_input),
+};
+
+static int rx51_aic34_init(struct snd_soc_codec *codec)
+{
+        int err;
+
+        /* Set up NC codec pins */
+        snd_soc_dapm_nc_pin(codec, "MIC3L");
+        snd_soc_dapm_nc_pin(codec, "MIC3R");
+        snd_soc_dapm_nc_pin(codec, "LINE1R");
+
+        /* Add RX-51 specific controls */
+        err = snd_soc_add_controls(codec, aic34_rx51_controls,
+                                   ARRAY_SIZE(aic34_rx51_controls));
+        if (err < 0)
+                return err;
+
+        /* Add RX-51 specific widgets */
+        snd_soc_dapm_new_controls(codec, aic34_dapm_widgets,
+                                  ARRAY_SIZE(aic34_dapm_widgets));
+
+        /* Set up RX-51 specific audio path audio_map */
+        snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));
+
+        snd_soc_dapm_sync(codec);
+
+        return 0;
+}
+
+/* Digital audio interface glue - connects codec <--> CPU */
+static struct snd_soc_dai_link rx51_dai[] = {
+        {
+                .name = "TLV320AIC34",
+                .stream_name = "AIC34",
+                .cpu_dai = &omap_mcbsp_dai[0],
+                .codec_dai = &aic3x_dai,
+                .init = rx51_aic34_init,
+                .ops = &rx51_ops,
+        },
+};
+
+/* Audio private data */
+static struct aic3x_setup_data rx51_aic34_setup = {
+        .gpio_func[0] = AIC3X_GPIO1_FUNC_DISABLED,
+        .gpio_func[1] = AIC3X_GPIO2_FUNC_DIGITAL_MIC_INPUT,
+};
+
+/* Audio card */
+static struct snd_soc_card rx51_sound_card = {
+        .name = "RX-51",
+        .dai_link = rx51_dai,
+        .num_links = ARRAY_SIZE(rx51_dai),
+        .platform = &omap_soc_platform,
+};
+
+/* Audio subsystem */
+static struct snd_soc_device rx51_snd_devdata = {
+        .card = &rx51_sound_card,
+        .codec_dev = &soc_codec_dev_aic3x,
+        .codec_data = &rx51_aic34_setup,
+};
+
+static struct platform_device *rx51_snd_device;
+
+static int __init rx51_soc_init(void)
+{
+        int err;
+
+        if (!machine_is_nokia_rx51())
+                return -ENODEV;
+
+        rx51_snd_device = platform_device_alloc("soc-audio", -1);
+        if (!rx51_snd_device) {
+                err = -ENOMEM;
+                goto err1;
+        }
+
+        platform_set_drvdata(rx51_snd_device, &rx51_snd_devdata);
+        rx51_snd_devdata.dev = &rx51_snd_device->dev;
+        *(unsigned int *)rx51_dai[0].cpu_dai->private_data = 1; /* McBSP2 */
+
+        err = platform_device_add(rx51_snd_device);
+        if (err)
+                goto err2;
+
+        return 0;
+err2:
+        platform_device_put(rx51_snd_device);
+err1:
+
+        return err;
+}
+
+static void __exit rx51_soc_exit(void)
+{
+        platform_device_unregister(rx51_snd_device);
+}
+
+module_init(rx51_soc_init);
+module_exit(rx51_soc_exit);
+
+MODULE_AUTHOR("Nokia Corporation");
+MODULE_DESCRIPTION("ALSA SoC Nokia RX-51");
+MODULE_LICENSE("GPL");