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authorPeter Ujfalusi <peter.ujfalusi@nokia.com>2008-11-24 13:49:38 +0200
committerMark Brown <broonie@opensource.wolfsonmicro.com>2008-11-24 14:05:40 +0000
commitb0bd53a7399f65e2d1b37cd44c5003e55b886c1e (patch)
treeb79033f663fd326322c7c91b01c57724f6ee4c7d /sound/soc
parent0d33ea0b0f954dddd3996597c663c111249d4df9 (diff)
ASoC: TWL4030: Add helper function for output gain controls
Some of the gain controls in TWL (mostly those which are associated with the outputs) are implemented in an interesting way: 0x0 : Power down (mute) 0x1 : 6dB 0x2 : 0 dB 0x3 : -6 dB Inverting not going to help with these. Custom volsw and volsw_2r get/put functions to handle these gains. Signed-off-by: Peter Ujfalusi <peter.ujfalusi@nokia.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Diffstat (limited to 'sound/soc')
-rw-r--r--sound/soc/codecs/twl4030.c157
1 files changed, 157 insertions, 0 deletions
diff --git a/sound/soc/codecs/twl4030.c b/sound/soc/codecs/twl4030.c
index 91effd341c0..41362314789 100644
--- a/sound/soc/codecs/twl4030.c
+++ b/sound/soc/codecs/twl4030.c
@@ -191,6 +191,163 @@ static void twl4030_init_chip(struct snd_soc_codec *codec)
}
/*
+ * Some of the gain controls in TWL (mostly those which are associated with
+ * the outputs) are implemented in an interesting way:
+ * 0x0 : Power down (mute)
+ * 0x1 : 6dB
+ * 0x2 : 0 dB
+ * 0x3 : -6 dB
+ * Inverting not going to help with these.
+ * Custom volsw and volsw_2r get/put functions to handle these gain bits.
+ */
+#define SOC_DOUBLE_TLV_TWL4030(xname, xreg, shift_left, shift_right, xmax,\
+ xinvert, tlv_array) \
+{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = (xname),\
+ .access = SNDRV_CTL_ELEM_ACCESS_TLV_READ |\
+ SNDRV_CTL_ELEM_ACCESS_READWRITE,\
+ .tlv.p = (tlv_array), \
+ .info = snd_soc_info_volsw, \
+ .get = snd_soc_get_volsw_twl4030, \
+ .put = snd_soc_put_volsw_twl4030, \
+ .private_value = (unsigned long)&(struct soc_mixer_control) \
+ {.reg = xreg, .shift = shift_left, .rshift = shift_right,\
+ .max = xmax, .invert = xinvert} }
+#define SOC_DOUBLE_R_TLV_TWL4030(xname, reg_left, reg_right, xshift, xmax,\
+ xinvert, tlv_array) \
+{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = (xname),\
+ .access = SNDRV_CTL_ELEM_ACCESS_TLV_READ |\
+ SNDRV_CTL_ELEM_ACCESS_READWRITE,\
+ .tlv.p = (tlv_array), \
+ .info = snd_soc_info_volsw_2r, \
+ .get = snd_soc_get_volsw_r2_twl4030,\
+ .put = snd_soc_put_volsw_r2_twl4030, \
+ .private_value = (unsigned long)&(struct soc_mixer_control) \
+ {.reg = reg_left, .rreg = reg_right, .shift = xshift, \
+ .max = xmax, .invert = xinvert} }
+#define SOC_SINGLE_TLV_TWL4030(xname, xreg, xshift, xmax, xinvert, tlv_array) \
+ SOC_DOUBLE_TLV_TWL4030(xname, xreg, xshift, xshift, xmax, \
+ xinvert, tlv_array)
+
+static int snd_soc_get_volsw_twl4030(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct soc_mixer_control *mc =
+ (struct soc_mixer_control *)kcontrol->private_value;
+ struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
+ unsigned int reg = mc->reg;
+ unsigned int shift = mc->shift;
+ unsigned int rshift = mc->rshift;
+ int max = mc->max;
+ int mask = (1 << fls(max)) - 1;
+
+ ucontrol->value.integer.value[0] =
+ (snd_soc_read(codec, reg) >> shift) & mask;
+ if (ucontrol->value.integer.value[0])
+ ucontrol->value.integer.value[0] =
+ max + 1 - ucontrol->value.integer.value[0];
+
+ if (shift != rshift) {
+ ucontrol->value.integer.value[1] =
+ (snd_soc_read(codec, reg) >> rshift) & mask;
+ if (ucontrol->value.integer.value[1])
+ ucontrol->value.integer.value[1] =
+ max + 1 - ucontrol->value.integer.value[1];
+ }
+
+ return 0;
+}
+
+static int snd_soc_put_volsw_twl4030(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct soc_mixer_control *mc =
+ (struct soc_mixer_control *)kcontrol->private_value;
+ struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
+ unsigned int reg = mc->reg;
+ unsigned int shift = mc->shift;
+ unsigned int rshift = mc->rshift;
+ int max = mc->max;
+ int mask = (1 << fls(max)) - 1;
+ unsigned short val, val2, val_mask;
+
+ val = (ucontrol->value.integer.value[0] & mask);
+
+ val_mask = mask << shift;
+ if (val)
+ val = max + 1 - val;
+ val = val << shift;
+ if (shift != rshift) {
+ val2 = (ucontrol->value.integer.value[1] & mask);
+ val_mask |= mask << rshift;
+ if (val2)
+ val2 = max + 1 - val2;
+ val |= val2 << rshift;
+ }
+ return snd_soc_update_bits(codec, reg, val_mask, val);
+}
+
+static int snd_soc_get_volsw_r2_twl4030(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct soc_mixer_control *mc =
+ (struct soc_mixer_control *)kcontrol->private_value;
+ struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
+ unsigned int reg = mc->reg;
+ unsigned int reg2 = mc->rreg;
+ unsigned int shift = mc->shift;
+ int max = mc->max;
+ int mask = (1<<fls(max))-1;
+
+ ucontrol->value.integer.value[0] =
+ (snd_soc_read(codec, reg) >> shift) & mask;
+ ucontrol->value.integer.value[1] =
+ (snd_soc_read(codec, reg2) >> shift) & mask;
+
+ if (ucontrol->value.integer.value[0])
+ ucontrol->value.integer.value[0] =
+ max + 1 - ucontrol->value.integer.value[0];
+ if (ucontrol->value.integer.value[1])
+ ucontrol->value.integer.value[1] =
+ max + 1 - ucontrol->value.integer.value[1];
+
+ return 0;
+}
+
+static int snd_soc_put_volsw_r2_twl4030(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct soc_mixer_control *mc =
+ (struct soc_mixer_control *)kcontrol->private_value;
+ struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
+ unsigned int reg = mc->reg;
+ unsigned int reg2 = mc->rreg;
+ unsigned int shift = mc->shift;
+ int max = mc->max;
+ int mask = (1 << fls(max)) - 1;
+ int err;
+ unsigned short val, val2, val_mask;
+
+ val_mask = mask << shift;
+ val = (ucontrol->value.integer.value[0] & mask);
+ val2 = (ucontrol->value.integer.value[1] & mask);
+
+ if (val)
+ val = max + 1 - val;
+ if (val2)
+ val2 = max + 1 - val2;
+
+ val = val << shift;
+ val2 = val2 << shift;
+
+ err = snd_soc_update_bits(codec, reg, val_mask, val);
+ if (err < 0)
+ return err;
+
+ err = snd_soc_update_bits(codec, reg2, val_mask, val2);
+ return err;
+}
+
+/*
* FGAIN volume control:
* from -62 to 0 dB in 1 dB steps (mute instead of -63 dB)
*/