ASoC: OMAP-McBSP: ASoC interface for McBSP sidetone

Add ASoC interface for OMAP McBSP2 and McBSP3 sidetones.

Signed-off-by: Ilkka Koskinen <ilkka.koskinen@nokia.com>
Acked-by: Peter Ujfalusi <peter.ujfalusi@nokia.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Tested-by: Jarkko Nikula <jhnikula@gmail.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

1 files changed, 138 insertions, 0 deletions

diff --git a/sound/soc/omap/omap-mcbsp.c b/sound/soc/omap/omap-mcbsp.c
index c0039b35fb25..8da14f537f49 100644
--- a/sound/soc/omap/omap-mcbsp.c
+++ b/sound/soc/omap/omap-mcbsp.c
@@ -39,6 +39,14 @@
 
 #define OMAP_MCBSP_RATES        (SNDRV_PCM_RATE_8000_96000)
 
+#define OMAP_MCBSP_SOC_SINGLE_S16_EXT(xname, xmin, xmax, \
+        xhandler_get, xhandler_put) \
+{       .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, \
+        .info = omap_mcbsp_st_info_volsw, \
+        .get = xhandler_get, .put = xhandler_put, \
+        .private_value = (unsigned long) &(struct soc_mixer_control) \
+        {.min = xmin, .max = xmax} }
+
 struct omap_mcbsp_data {
         unsigned int                    bus_id;
         struct omap_mcbsp_reg_cfg       regs;
@@ -637,6 +645,136 @@ struct snd_soc_dai omap_mcbsp_dai[] = {
 
 EXPORT_SYMBOL_GPL(omap_mcbsp_dai);
 
+int omap_mcbsp_st_info_volsw(struct snd_kcontrol *kcontrol,
+                        struct snd_ctl_elem_info *uinfo)
+{
+        struct soc_mixer_control *mc =
+                (struct soc_mixer_control *)kcontrol->private_value;
+        int max = mc->max;
+        int min = mc->min;
+
+        uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
+        uinfo->count = 1;
+        uinfo->value.integer.min = min;
+        uinfo->value.integer.max = max;
+        return 0;
+}
+
+#define OMAP_MCBSP_ST_SET_CHANNEL_VOLUME(id, channel)                   \
+static int                                                              \
+omap_mcbsp##id##_set_st_ch##channel##_volume(struct snd_kcontrol *kc,   \
+                                        struct snd_ctl_elem_value *uc)  \
+{                                                                       \
+        struct soc_mixer_control *mc =                                  \
+                (struct soc_mixer_control *)kc->private_value;          \
+        int max = mc->max;                                              \
+        int min = mc->min;                                              \
+        int val = uc->value.integer.value[0];                           \
+                                                                        \
+        if (val < min || val > max)                                     \
+                return -EINVAL;                                         \
+                                                                        \
+        /* OMAP McBSP implementation uses index values 0..4 */          \
+        return omap_st_set_chgain((id)-1, channel, val);                \
+}
+
+#define OMAP_MCBSP_ST_GET_CHANNEL_VOLUME(id, channel)                   \
+static int                                                              \
+omap_mcbsp##id##_get_st_ch##channel##_volume(struct snd_kcontrol *kc,   \
+                                        struct snd_ctl_elem_value *uc)  \
+{                                                                       \
+        s16 chgain;                                                     \
+                                                                        \
+        if (omap_st_get_chgain((id)-1, channel, &chgain))               \
+                return -EAGAIN;                                         \
+                                                                        \
+        uc->value.integer.value[0] = chgain;                            \
+        return 0;                                                       \
+}
+
+OMAP_MCBSP_ST_SET_CHANNEL_VOLUME(2, 0)
+OMAP_MCBSP_ST_SET_CHANNEL_VOLUME(2, 1)
+OMAP_MCBSP_ST_SET_CHANNEL_VOLUME(3, 0)
+OMAP_MCBSP_ST_SET_CHANNEL_VOLUME(3, 1)
+OMAP_MCBSP_ST_GET_CHANNEL_VOLUME(2, 0)
+OMAP_MCBSP_ST_GET_CHANNEL_VOLUME(2, 1)
+OMAP_MCBSP_ST_GET_CHANNEL_VOLUME(3, 0)
+OMAP_MCBSP_ST_GET_CHANNEL_VOLUME(3, 1)
+
+static int omap_mcbsp_st_put_mode(struct snd_kcontrol *kcontrol,
+                                struct snd_ctl_elem_value *ucontrol)
+{
+        struct soc_mixer_control *mc =
+                (struct soc_mixer_control *)kcontrol->private_value;
+        u8 value = ucontrol->value.integer.value[0];
+
+        if (value == omap_st_is_enabled(mc->reg))
+                return 0;
+
+        if (value)
+                omap_st_enable(mc->reg);
+        else
+                omap_st_disable(mc->reg);
+
+        return 1;
+}
+
+static int omap_mcbsp_st_get_mode(struct snd_kcontrol *kcontrol,
+                                struct snd_ctl_elem_value *ucontrol)
+{
+        struct soc_mixer_control *mc =
+                (struct soc_mixer_control *)kcontrol->private_value;
+
+        ucontrol->value.integer.value[0] = omap_st_is_enabled(mc->reg);
+        return 0;
+}
+
+static const struct snd_kcontrol_new omap_mcbsp2_st_controls[] = {
+        SOC_SINGLE_EXT("McBSP2 Sidetone Switch", 1, 0, 1, 0,
+                        omap_mcbsp_st_get_mode, omap_mcbsp_st_put_mode),
+        OMAP_MCBSP_SOC_SINGLE_S16_EXT("McBSP2 Sidetone Channel 0 Volume",
+                                      -32768, 32767,
+                                      omap_mcbsp2_get_st_ch0_volume,
+                                      omap_mcbsp2_set_st_ch0_volume),
+        OMAP_MCBSP_SOC_SINGLE_S16_EXT("McBSP2 Sidetone Channel 1 Volume",
+                                      -32768, 32767,
+                                      omap_mcbsp2_get_st_ch1_volume,
+                                      omap_mcbsp2_set_st_ch1_volume),
+};
+
+static const struct snd_kcontrol_new omap_mcbsp3_st_controls[] = {
+        SOC_SINGLE_EXT("McBSP3 Sidetone Switch", 2, 0, 1, 0,
+                        omap_mcbsp_st_get_mode, omap_mcbsp_st_put_mode),
+        OMAP_MCBSP_SOC_SINGLE_S16_EXT("McBSP3 Sidetone Channel 0 Volume",
+                                      -32768, 32767,
+                                      omap_mcbsp3_get_st_ch0_volume,
+                                      omap_mcbsp3_set_st_ch0_volume),
+        OMAP_MCBSP_SOC_SINGLE_S16_EXT("McBSP3 Sidetone Channel 1 Volume",
+                                      -32768, 32767,
+                                      omap_mcbsp3_get_st_ch1_volume,
+                                      omap_mcbsp3_set_st_ch1_volume),
+};
+
+int omap_mcbsp_st_add_controls(struct snd_soc_codec *codec, int mcbsp_id)
+{
+        if (!cpu_is_omap34xx())
+                return -ENODEV;
+
+        switch (mcbsp_id) {
+        case 1: /* McBSP 2 */
+                return snd_soc_add_controls(codec, omap_mcbsp2_st_controls,
+                                        ARRAY_SIZE(omap_mcbsp2_st_controls));
+        case 2: /* McBSP 3 */
+                return snd_soc_add_controls(codec, omap_mcbsp3_st_controls,
+                                        ARRAY_SIZE(omap_mcbsp3_st_controls));
+        default:
+                break;
+        }
+
+        return -EINVAL;
+}
+EXPORT_SYMBOL_GPL(omap_mcbsp_st_add_controls);
+
 static int __init snd_omap_mcbsp_init(void)
 {
         return snd_soc_register_dais(omap_mcbsp_dai,