ASoC: TWL6040: Add twl6040 codec driver

Initial version of TWL6040 codec driver.

The TWL6040 codec uses a proprietary PDM-based digital audio interface.
Audio paths supported are:

- Input: Main Mic, Sub Mic, Headset Mic, Auxiliary-FM Left/Right
- Output: Headset Left/Right, Handsfree Left/Right

TWL6040 codec supports power-up/down manual and automatic sequence.
Manual sequence is done through a specific register writes sequence.
Automatic sequence is done when the codec is powered-up through the
external AUDPWRON line. The completion of the sequence is signaled
through the audio interrupt.

TWL6040 codec sysclk can be provided by: low-power or high
performance PLL:

- The low-power PLL takes a low-frequency input at 32,768 Hz and
generates an approximate of 17.64 or 19.2 MHz (for 44.1 KHz and 48 KHz
respectively)

- The high-performance PLL generates an exact 19.2 MHz clock signal
from high-frequency input at 12/19.2/26/38.4 MHz.

Low-power playback mode is a special scenario where only headset path
(headset DAC and driver) is active.

For the particular case of headset path, PLL being used defines the
headset power mode: low-power, high-performance.

Signed-off-by: Misael Lopez Cruz <x0052729@ti.com>
Signed-off-by: Jorge Eduardo Candelaria <jorge.candelaria@ti.com>
Signed-off-by: Margarita Olaya Cabrera <magi.olaya@ti.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

1 files changed, 141 insertions, 0 deletions

diff --git a/sound/soc/codecs/twl6040.h b/sound/soc/codecs/twl6040.h
new file mode 100644
index 000000000000..c472070a1da2
--- /dev/null
+++ b/sound/soc/codecs/twl6040.h
@@ -0,0 +1,141 @@
+/*
+ * ALSA SoC TWL6040 codec driver
+ *
+ * Author:      Misael Lopez Cruz <x0052729@ti.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
+ *
+ */
+
+#ifndef __TWL6040_H__
+#define __TWL6040_H__
+
+#define TWL6040_REG_ASICID              0x01
+#define TWL6040_REG_ASICREV             0x02
+#define TWL6040_REG_INTID               0x03
+#define TWL6040_REG_INTMR               0x04
+#define TWL6040_REG_NCPCTL              0x05
+#define TWL6040_REG_LDOCTL              0x06
+#define TWL6040_REG_HPPLLCTL            0x07
+#define TWL6040_REG_LPPLLCTL            0x08
+#define TWL6040_REG_LPPLLDIV            0x09
+#define TWL6040_REG_AMICBCTL            0x0A
+#define TWL6040_REG_DMICBCTL            0x0B
+#define TWL6040_REG_MICLCTL             0x0C
+#define TWL6040_REG_MICRCTL             0x0D
+#define TWL6040_REG_MICGAIN             0x0E
+#define TWL6040_REG_LINEGAIN            0x0F
+#define TWL6040_REG_HSLCTL              0x10
+#define TWL6040_REG_HSRCTL              0x11
+#define TWL6040_REG_HSGAIN              0x12
+#define TWL6040_REG_EARCTL              0x13
+#define TWL6040_REG_HFLCTL              0x14
+#define TWL6040_REG_HFLGAIN             0x15
+#define TWL6040_REG_HFRCTL              0x16
+#define TWL6040_REG_HFRGAIN             0x17
+#define TWL6040_REG_VIBCTLL             0x18
+#define TWL6040_REG_VIBDATL             0x19
+#define TWL6040_REG_VIBCTLR             0x1A
+#define TWL6040_REG_VIBDATR             0x1B
+#define TWL6040_REG_HKCTL1              0x1C
+#define TWL6040_REG_HKCTL2              0x1D
+#define TWL6040_REG_GPOCTL              0x1E
+#define TWL6040_REG_ALB                 0x1F
+#define TWL6040_REG_DLB                 0x20
+#define TWL6040_REG_TRIM1               0x28
+#define TWL6040_REG_TRIM2               0x29
+#define TWL6040_REG_TRIM3               0x2A
+#define TWL6040_REG_HSOTRIM             0x2B
+#define TWL6040_REG_HFOTRIM             0x2C
+#define TWL6040_REG_ACCCTL              0x2D
+#define TWL6040_REG_STATUS              0x2E
+
+#define TWL6040_CACHEREGNUM             (TWL6040_REG_STATUS + 1)
+
+#define TWL6040_VIOREGNUM               18
+#define TWL6040_VDDREGNUM               21
+
+/* INTID (0x03) fields */
+
+#define TWL6040_THINT                   0x01
+#define TWL6040_PLUGINT                 0x02
+#define TWL6040_UNPLUGINT               0x04
+#define TWL6040_HOOKINT                 0x08
+#define TWL6040_HFINT                   0x10
+#define TWL6040_VIBINT                  0x20
+#define TWL6040_READYINT                0x40
+
+/* INTMR (0x04) fields */
+
+#define TWL6040_READYMSK                0x40
+#define TWL6040_ALLINT_MSK              0x7B
+
+/* NCPCTL (0x05) fields */
+
+#define TWL6040_NCPENA                  0x01
+#define TWL6040_NCPOPEN                 0x40
+
+/* LDOCTL (0x06) fields */
+
+#define TWL6040_LSLDOENA                0x01
+#define TWL6040_HSLDOENA                0x04
+#define TWL6040_REFENA                  0x40
+#define TWL6040_OSCENA                  0x80
+
+/* HPPLLCTL (0x07) fields */
+
+#define TWL6040_HPLLENA                 0x01
+#define TWL6040_HPLLRST                 0x02
+#define TWL6040_HPLLBP                  0x04
+#define TWL6040_HPLLSQRENA              0x08
+#define TWL6040_HPLLSQRBP               0x10
+#define TWL6040_MCLK_12000KHZ           (0 << 5)
+#define TWL6040_MCLK_19200KHZ           (1 << 5)
+#define TWL6040_MCLK_26000KHZ           (2 << 5)
+#define TWL6040_MCLK_38400KHZ           (3 << 5)
+#define TWL6040_MCLK_MSK                0x60
+
+/* LPPLLCTL (0x08) fields */
+
+#define TWL6040_LPLLENA                 0x01
+#define TWL6040_LPLLRST                 0x02
+#define TWL6040_LPLLSEL                 0x04
+#define TWL6040_LPLLFIN                 0x08
+#define TWL6040_HPLLSEL                 0x10
+
+/* HSLCTL (0x10) fields */
+
+#define TWL6040_HSDACMODEL              0x02
+#define TWL6040_HSDRVMODEL              0x08
+
+/* HSRCTL (0x11) fields */
+
+#define TWL6040_HSDACMODER              0x02
+#define TWL6040_HSDRVMODER              0x08
+
+/* ACCCTL (0x2D) fields */
+
+#define TWL6040_RESETSPLIT              0x04
+
+#define TWL6040_SYSCLK_SEL_LPPLL        1
+#define TWL6040_SYSCLK_SEL_HPPLL        2
+
+#define TWL6040_HPPLL_ID                1
+#define TWL6040_LPPLL_ID                2
+
+extern struct snd_soc_dai twl6040_dai;
+extern struct snd_soc_codec_device soc_codec_dev_twl6040;
+
+#endif /* End of __TWL6040_H__ */