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>
diff --git a/sound/soc/codecs/twl6040.c b/sound/soc/codecs/twl6040.c
new file mode 100755
index 0000000..0e4dce7
--- /dev/null
+++ b/sound/soc/codecs/twl6040.c
@@ -0,0 +1,1227 @@
+/*
+ * 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
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/pm.h>
+#include <linux/i2c.h>
+#include <linux/gpio.h>
+#include <linux/platform_device.h>
+#include <linux/i2c/twl.h>
+
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/soc-dapm.h>
+#include <sound/initval.h>
+#include <sound/tlv.h>
+
+#include "twl6040.h"
+
+#define TWL6040_RATES (SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000)
+#define TWL6040_FORMATS (SNDRV_PCM_FMTBIT_S32_LE)
+
+/* codec private data */
+struct twl6040_data {
+ struct snd_soc_codec codec;
+ int audpwron;
+ int naudint;
+ int codec_powered;
+ int pll;
+ int non_lp;
+ unsigned int sysclk;
+ struct snd_pcm_hw_constraint_list *sysclk_constraints;
+ struct completion ready;
+};
+
+/*
+ * twl6040 register cache & default register settings
+ */
+static const u8 twl6040_reg[TWL6040_CACHEREGNUM] = {
+ 0x00, /* not used 0x00 */
+ 0x4B, /* TWL6040_ASICID (ro) 0x01 */
+ 0x00, /* TWL6040_ASICREV (ro) 0x02 */
+ 0x00, /* TWL6040_INTID 0x03 */
+ 0x00, /* TWL6040_INTMR 0x04 */
+ 0x00, /* TWL6040_NCPCTRL 0x05 */
+ 0x00, /* TWL6040_LDOCTL 0x06 */
+ 0x60, /* TWL6040_HPPLLCTL 0x07 */
+ 0x00, /* TWL6040_LPPLLCTL 0x08 */
+ 0x4A, /* TWL6040_LPPLLDIV 0x09 */
+ 0x00, /* TWL6040_AMICBCTL 0x0A */
+ 0x00, /* TWL6040_DMICBCTL 0x0B */
+ 0x18, /* TWL6040_MICLCTL 0x0C - No input selected on Left Mic */
+ 0x18, /* TWL6040_MICRCTL 0x0D - No input selected on Right Mic */
+ 0x00, /* TWL6040_MICGAIN 0x0E */
+ 0x1B, /* TWL6040_LINEGAIN 0x0F */
+ 0x00, /* TWL6040_HSLCTL 0x10 */
+ 0x00, /* TWL6040_HSRCTL 0x11 */
+ 0x00, /* TWL6040_HSGAIN 0x12 */
+ 0x00, /* TWL6040_EARCTL 0x13 */
+ 0x00, /* TWL6040_HFLCTL 0x14 */
+ 0x00, /* TWL6040_HFLGAIN 0x15 */
+ 0x00, /* TWL6040_HFRCTL 0x16 */
+ 0x00, /* TWL6040_HFRGAIN 0x17 */
+ 0x00, /* TWL6040_VIBCTLL 0x18 */
+ 0x00, /* TWL6040_VIBDATL 0x19 */
+ 0x00, /* TWL6040_VIBCTLR 0x1A */
+ 0x00, /* TWL6040_VIBDATR 0x1B */
+ 0x00, /* TWL6040_HKCTL1 0x1C */
+ 0x00, /* TWL6040_HKCTL2 0x1D */
+ 0x00, /* TWL6040_GPOCTL 0x1E */
+ 0x00, /* TWL6040_ALB 0x1F */
+ 0x00, /* TWL6040_DLB 0x20 */
+ 0x00, /* not used 0x21 */
+ 0x00, /* not used 0x22 */
+ 0x00, /* not used 0x23 */
+ 0x00, /* not used 0x24 */
+ 0x00, /* not used 0x25 */
+ 0x00, /* not used 0x26 */
+ 0x00, /* not used 0x27 */
+ 0x00, /* TWL6040_TRIM1 0x28 */
+ 0x00, /* TWL6040_TRIM2 0x29 */
+ 0x00, /* TWL6040_TRIM3 0x2A */
+ 0x00, /* TWL6040_HSOTRIM 0x2B */
+ 0x00, /* TWL6040_HFOTRIM 0x2C */
+ 0x09, /* TWL6040_ACCCTL 0x2D */
+ 0x00, /* TWL6040_STATUS (ro) 0x2E */
+};
+
+/*
+ * twl6040 vio/gnd registers:
+ * registers under vio/gnd supply can be accessed
+ * before the power-up sequence, after NRESPWRON goes high
+ */
+static const int twl6040_vio_reg[TWL6040_VIOREGNUM] = {
+ TWL6040_REG_ASICID,
+ TWL6040_REG_ASICREV,
+ TWL6040_REG_INTID,
+ TWL6040_REG_INTMR,
+ TWL6040_REG_NCPCTL,
+ TWL6040_REG_LDOCTL,
+ TWL6040_REG_AMICBCTL,
+ TWL6040_REG_DMICBCTL,
+ TWL6040_REG_HKCTL1,
+ TWL6040_REG_HKCTL2,
+ TWL6040_REG_GPOCTL,
+ TWL6040_REG_TRIM1,
+ TWL6040_REG_TRIM2,
+ TWL6040_REG_TRIM3,
+ TWL6040_REG_HSOTRIM,
+ TWL6040_REG_HFOTRIM,
+ TWL6040_REG_ACCCTL,
+ TWL6040_REG_STATUS,
+};
+
+/*
+ * twl6040 vdd/vss registers:
+ * registers under vdd/vss supplies can only be accessed
+ * after the power-up sequence
+ */
+static const int twl6040_vdd_reg[TWL6040_VDDREGNUM] = {
+ TWL6040_REG_HPPLLCTL,
+ TWL6040_REG_LPPLLCTL,
+ TWL6040_REG_LPPLLDIV,
+ TWL6040_REG_MICLCTL,
+ TWL6040_REG_MICRCTL,
+ TWL6040_REG_MICGAIN,
+ TWL6040_REG_LINEGAIN,
+ TWL6040_REG_HSLCTL,
+ TWL6040_REG_HSRCTL,
+ TWL6040_REG_HSGAIN,
+ TWL6040_REG_EARCTL,
+ TWL6040_REG_HFLCTL,
+ TWL6040_REG_HFLGAIN,
+ TWL6040_REG_HFRCTL,
+ TWL6040_REG_HFRGAIN,
+ TWL6040_REG_VIBCTLL,
+ TWL6040_REG_VIBDATL,
+ TWL6040_REG_VIBCTLR,
+ TWL6040_REG_VIBDATR,
+ TWL6040_REG_ALB,
+ TWL6040_REG_DLB,
+};
+
+/*
+ * read twl6040 register cache
+ */
+static inline unsigned int twl6040_read_reg_cache(struct snd_soc_codec *codec,
+ unsigned int reg)
+{
+ u8 *cache = codec->reg_cache;
+
+ if (reg >= TWL6040_CACHEREGNUM)
+ return -EIO;
+
+ return cache[reg];
+}
+
+/*
+ * write twl6040 register cache
+ */
+static inline void twl6040_write_reg_cache(struct snd_soc_codec *codec,
+ u8 reg, u8 value)
+{
+ u8 *cache = codec->reg_cache;
+
+ if (reg >= TWL6040_CACHEREGNUM)
+ return;
+ cache[reg] = value;
+}
+
+/*
+ * read from twl6040 hardware register
+ */
+static int twl6040_read_reg_volatile(struct snd_soc_codec *codec,
+ unsigned int reg)
+{
+ u8 value;
+
+ if (reg >= TWL6040_CACHEREGNUM)
+ return -EIO;
+
+ twl_i2c_read_u8(TWL4030_MODULE_AUDIO_VOICE, &value, reg);
+ twl6040_write_reg_cache(codec, reg, value);
+
+ return value;
+}
+
+/*
+ * write to the twl6040 register space
+ */
+static int twl6040_write(struct snd_soc_codec *codec,
+ unsigned int reg, unsigned int value)
+{
+ if (reg >= TWL6040_CACHEREGNUM)
+ return -EIO;
+
+ twl6040_write_reg_cache(codec, reg, value);
+ return twl_i2c_write_u8(TWL4030_MODULE_AUDIO_VOICE, value, reg);
+}
+
+static void twl6040_init_vio_regs(struct snd_soc_codec *codec)
+{
+ u8 *cache = codec->reg_cache;
+ int reg, i;
+
+ /* allow registers to be accessed by i2c */
+ twl6040_write(codec, TWL6040_REG_ACCCTL, cache[TWL6040_REG_ACCCTL]);
+
+ for (i = 0; i < TWL6040_VIOREGNUM; i++) {
+ reg = twl6040_vio_reg[i];
+ /* skip read-only registers (ASICID, ASICREV, STATUS) */
+ switch (reg) {
+ case TWL6040_REG_ASICID:
+ case TWL6040_REG_ASICREV:
+ case TWL6040_REG_STATUS:
+ continue;
+ default:
+ break;
+ }
+ twl6040_write(codec, reg, cache[reg]);
+ }
+}
+
+static void twl6040_init_vdd_regs(struct snd_soc_codec *codec)
+{
+ u8 *cache = codec->reg_cache;
+ int reg, i;
+
+ for (i = 0; i < TWL6040_VDDREGNUM; i++) {
+ reg = twl6040_vdd_reg[i];
+ twl6040_write(codec, reg, cache[reg]);
+ }
+}
+
+/* twl6040 codec manual power-up sequence */
+static void twl6040_power_up(struct snd_soc_codec *codec)
+{
+ u8 ncpctl, ldoctl, lppllctl, accctl;
+
+ ncpctl = twl6040_read_reg_cache(codec, TWL6040_REG_NCPCTL);
+ ldoctl = twl6040_read_reg_cache(codec, TWL6040_REG_LDOCTL);
+ lppllctl = twl6040_read_reg_cache(codec, TWL6040_REG_LPPLLCTL);
+ accctl = twl6040_read_reg_cache(codec, TWL6040_REG_ACCCTL);
+
+ /* enable reference system */
+ ldoctl |= TWL6040_REFENA;
+ twl6040_write(codec, TWL6040_REG_LDOCTL, ldoctl);
+ msleep(10);
+ /* enable internal oscillator */
+ ldoctl |= TWL6040_OSCENA;
+ twl6040_write(codec, TWL6040_REG_LDOCTL, ldoctl);
+ udelay(10);
+ /* enable high-side ldo */
+ ldoctl |= TWL6040_HSLDOENA;
+ twl6040_write(codec, TWL6040_REG_LDOCTL, ldoctl);
+ udelay(244);
+ /* enable negative charge pump */
+ ncpctl |= TWL6040_NCPENA | TWL6040_NCPOPEN;
+ twl6040_write(codec, TWL6040_REG_NCPCTL, ncpctl);
+ udelay(488);
+ /* enable low-side ldo */
+ ldoctl |= TWL6040_LSLDOENA;
+ twl6040_write(codec, TWL6040_REG_LDOCTL, ldoctl);
+ udelay(244);
+ /* enable low-power pll */
+ lppllctl |= TWL6040_LPLLENA;
+ twl6040_write(codec, TWL6040_REG_LPPLLCTL, lppllctl);
+ /* reset state machine */
+ accctl |= TWL6040_RESETSPLIT;
+ twl6040_write(codec, TWL6040_REG_ACCCTL, accctl);
+ mdelay(5);
+ accctl &= ~TWL6040_RESETSPLIT;
+ twl6040_write(codec, TWL6040_REG_ACCCTL, accctl);
+ /* disable internal oscillator */
+ ldoctl &= ~TWL6040_OSCENA;
+ twl6040_write(codec, TWL6040_REG_LDOCTL, ldoctl);
+}
+
+/* twl6040 codec manual power-down sequence */
+static void twl6040_power_down(struct snd_soc_codec *codec)
+{
+ u8 ncpctl, ldoctl, lppllctl, accctl;
+
+ ncpctl = twl6040_read_reg_cache(codec, TWL6040_REG_NCPCTL);
+ ldoctl = twl6040_read_reg_cache(codec, TWL6040_REG_LDOCTL);
+ lppllctl = twl6040_read_reg_cache(codec, TWL6040_REG_LPPLLCTL);
+ accctl = twl6040_read_reg_cache(codec, TWL6040_REG_ACCCTL);
+
+ /* enable internal oscillator */
+ ldoctl |= TWL6040_OSCENA;
+ twl6040_write(codec, TWL6040_REG_LDOCTL, ldoctl);
+ udelay(10);
+ /* disable low-power pll */
+ lppllctl &= ~TWL6040_LPLLENA;
+ twl6040_write(codec, TWL6040_REG_LPPLLCTL, lppllctl);
+ /* disable low-side ldo */
+ ldoctl &= ~TWL6040_LSLDOENA;
+ twl6040_write(codec, TWL6040_REG_LDOCTL, ldoctl);
+ udelay(244);
+ /* disable negative charge pump */
+ ncpctl &= ~(TWL6040_NCPENA | TWL6040_NCPOPEN);
+ twl6040_write(codec, TWL6040_REG_NCPCTL, ncpctl);
+ udelay(488);
+ /* disable high-side ldo */
+ ldoctl &= ~TWL6040_HSLDOENA;
+ twl6040_write(codec, TWL6040_REG_LDOCTL, ldoctl);
+ udelay(244);
+ /* disable internal oscillator */
+ ldoctl &= ~TWL6040_OSCENA;
+ twl6040_write(codec, TWL6040_REG_LDOCTL, ldoctl);
+ /* disable reference system */
+ ldoctl &= ~TWL6040_REFENA;
+ twl6040_write(codec, TWL6040_REG_LDOCTL, ldoctl);
+ msleep(10);
+}
+
+/* set headset dac and driver power mode */
+static int headset_power_mode(struct snd_soc_codec *codec, int high_perf)
+{
+ int hslctl, hsrctl;
+ int mask = TWL6040_HSDRVMODEL | TWL6040_HSDACMODEL;
+
+ hslctl = twl6040_read_reg_cache(codec, TWL6040_REG_HSLCTL);
+ hsrctl = twl6040_read_reg_cache(codec, TWL6040_REG_HSRCTL);
+
+ if (high_perf) {
+ hslctl &= ~mask;
+ hsrctl &= ~mask;
+ } else {
+ hslctl |= mask;
+ hsrctl |= mask;
+ }
+
+ twl6040_write(codec, TWL6040_REG_HSLCTL, hslctl);
+ twl6040_write(codec, TWL6040_REG_HSRCTL, hsrctl);
+
+ return 0;
+}
+
+static int twl6040_power_mode_event(struct snd_soc_dapm_widget *w,
+ struct snd_kcontrol *kcontrol, int event)
+{
+ struct snd_soc_codec *codec = w->codec;
+ struct twl6040_data *priv = codec->private_data;
+
+ if (SND_SOC_DAPM_EVENT_ON(event))
+ priv->non_lp++;
+ else
+ priv->non_lp--;
+
+ return 0;
+}
+
+/* audio interrupt handler */
+static irqreturn_t twl6040_naudint_handler(int irq, void *data)
+{
+ struct snd_soc_codec *codec = data;
+ struct twl6040_data *priv = codec->private_data;
+ u8 intid;
+
+ twl_i2c_read_u8(TWL4030_MODULE_AUDIO_VOICE, &intid, TWL6040_REG_INTID);
+
+ switch (intid) {
+ case TWL6040_THINT:
+ dev_alert(codec->dev, "die temp over-limit detection\n");
+ break;
+ case TWL6040_PLUGINT:
+ case TWL6040_UNPLUGINT:
+ case TWL6040_HOOKINT:
+ break;
+ case TWL6040_HFINT:
+ dev_alert(codec->dev, "hf drivers over current detection\n");
+ break;
+ case TWL6040_VIBINT:
+ dev_alert(codec->dev, "vib drivers over current detection\n");
+ break;
+ case TWL6040_READYINT:
+ complete(&priv->ready);
+ break;
+ default:
+ dev_err(codec->dev, "unknown audio interrupt %d\n", intid);
+ break;
+ }
+
+ return IRQ_HANDLED;
+}
+
+/*
+ * MICATT volume control:
+ * from -6 to 0 dB in 6 dB steps
+ */
+static DECLARE_TLV_DB_SCALE(mic_preamp_tlv, -600, 600, 0);
+
+/*
+ * MICGAIN volume control:
+ * from 6 to 30 dB in 6 dB steps
+ */
+static DECLARE_TLV_DB_SCALE(mic_amp_tlv, 600, 600, 0);
+
+/*
+ * HSGAIN volume control:
+ * from -30 to 0 dB in 2 dB steps
+ */
+static DECLARE_TLV_DB_SCALE(hs_tlv, -3000, 200, 0);
+
+/*
+ * HFGAIN volume control:
+ * from -52 to 6 dB in 2 dB steps
+ */
+static DECLARE_TLV_DB_SCALE(hf_tlv, -5200, 200, 0);
+
+/* Left analog microphone selection */
+static const char *twl6040_amicl_texts[] =
+ {"Headset Mic", "Main Mic", "Aux/FM Left", "Off"};
+
+/* Right analog microphone selection */
+static const char *twl6040_amicr_texts[] =
+ {"Headset Mic", "Sub Mic", "Aux/FM Right", "Off"};
+
+static const struct soc_enum twl6040_enum[] = {
+ SOC_ENUM_SINGLE(TWL6040_REG_MICLCTL, 3, 3, twl6040_amicl_texts),
+ SOC_ENUM_SINGLE(TWL6040_REG_MICRCTL, 3, 3, twl6040_amicr_texts),
+};
+
+static const struct snd_kcontrol_new amicl_control =
+ SOC_DAPM_ENUM("Route", twl6040_enum[0]);
+
+static const struct snd_kcontrol_new amicr_control =
+ SOC_DAPM_ENUM("Route", twl6040_enum[1]);
+
+/* Headset DAC playback switches */
+static const struct snd_kcontrol_new hsdacl_switch_controls =
+ SOC_DAPM_SINGLE("Switch", TWL6040_REG_HSLCTL, 5, 1, 0);
+
+static const struct snd_kcontrol_new hsdacr_switch_controls =
+ SOC_DAPM_SINGLE("Switch", TWL6040_REG_HSRCTL, 5, 1, 0);
+
+/* Handsfree DAC playback switches */
+static const struct snd_kcontrol_new hfdacl_switch_controls =
+ SOC_DAPM_SINGLE("Switch", TWL6040_REG_HFLCTL, 2, 1, 0);
+
+static const struct snd_kcontrol_new hfdacr_switch_controls =
+ SOC_DAPM_SINGLE("Switch", TWL6040_REG_HFRCTL, 2, 1, 0);
+
+/* Headset driver switches */
+static const struct snd_kcontrol_new hsl_driver_switch_controls =
+ SOC_DAPM_SINGLE("Switch", TWL6040_REG_HSLCTL, 2, 1, 0);
+
+static const struct snd_kcontrol_new hsr_driver_switch_controls =
+ SOC_DAPM_SINGLE("Switch", TWL6040_REG_HSRCTL, 2, 1, 0);
+
+/* Handsfree driver switches */
+static const struct snd_kcontrol_new hfl_driver_switch_controls =
+ SOC_DAPM_SINGLE("Switch", TWL6040_REG_HFLCTL, 4, 1, 0);
+
+static const struct snd_kcontrol_new hfr_driver_switch_controls =
+ SOC_DAPM_SINGLE("Switch", TWL6040_REG_HFRCTL, 4, 1, 0);
+
+static const struct snd_kcontrol_new twl6040_snd_controls[] = {
+ /* Capture gains */
+ SOC_DOUBLE_TLV("Capture Preamplifier Volume",
+ TWL6040_REG_MICGAIN, 6, 7, 1, 1, mic_preamp_tlv),
+ SOC_DOUBLE_TLV("Capture Volume",
+ TWL6040_REG_MICGAIN, 0, 3, 4, 0, mic_amp_tlv),
+
+ /* Playback gains */
+ SOC_DOUBLE_TLV("Headset Playback Volume",
+ TWL6040_REG_HSGAIN, 0, 4, 0xF, 1, hs_tlv),
+ SOC_DOUBLE_R_TLV("Handsfree Playback Volume",
+ TWL6040_REG_HFLGAIN, TWL6040_REG_HFRGAIN, 0, 0x1D, 1, hf_tlv),
+
+};
+
+static const struct snd_soc_dapm_widget twl6040_dapm_widgets[] = {
+ /* Inputs */
+ SND_SOC_DAPM_INPUT("MAINMIC"),
+ SND_SOC_DAPM_INPUT("HSMIC"),
+ SND_SOC_DAPM_INPUT("SUBMIC"),
+ SND_SOC_DAPM_INPUT("AFML"),
+ SND_SOC_DAPM_INPUT("AFMR"),
+
+ /* Outputs */
+ SND_SOC_DAPM_OUTPUT("HSOL"),
+ SND_SOC_DAPM_OUTPUT("HSOR"),
+ SND_SOC_DAPM_OUTPUT("HFL"),
+ SND_SOC_DAPM_OUTPUT("HFR"),
+
+ /* Analog input muxes for the capture amplifiers */
+ SND_SOC_DAPM_MUX("Analog Left Capture Route",
+ SND_SOC_NOPM, 0, 0, &amicl_control),
+ SND_SOC_DAPM_MUX("Analog Right Capture Route",
+ SND_SOC_NOPM, 0, 0, &amicr_control),
+
+ /* Analog capture PGAs */
+ SND_SOC_DAPM_PGA("MicAmpL",
+ TWL6040_REG_MICLCTL, 0, 0, NULL, 0),
+ SND_SOC_DAPM_PGA("MicAmpR",
+ TWL6040_REG_MICRCTL, 0, 0, NULL, 0),
+
+ /* ADCs */
+ SND_SOC_DAPM_ADC("ADC Left", "Left Front Capture",
+ TWL6040_REG_MICLCTL, 2, 0),
+ SND_SOC_DAPM_ADC("ADC Right", "Right Front Capture",
+ TWL6040_REG_MICRCTL, 2, 0),
+
+ /* Microphone bias */
+ SND_SOC_DAPM_MICBIAS("Headset Mic Bias",
+ TWL6040_REG_AMICBCTL, 0, 0),
+ SND_SOC_DAPM_MICBIAS("Main Mic Bias",
+ TWL6040_REG_AMICBCTL, 4, 0),
+ SND_SOC_DAPM_MICBIAS("Digital Mic1 Bias",
+ TWL6040_REG_DMICBCTL, 0, 0),
+ SND_SOC_DAPM_MICBIAS("Digital Mic2 Bias",
+ TWL6040_REG_DMICBCTL, 4, 0),
+
+ /* DACs */
+ SND_SOC_DAPM_DAC("HSDAC Left", "Headset Playback",
+ TWL6040_REG_HSLCTL, 0, 0),
+ SND_SOC_DAPM_DAC("HSDAC Right", "Headset Playback",
+ TWL6040_REG_HSRCTL, 0, 0),
+ SND_SOC_DAPM_DAC_E("HFDAC Left", "Handsfree Playback",
+ TWL6040_REG_HFLCTL, 0, 0,
+ twl6040_power_mode_event,
+ SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_POST_PMD),
+ SND_SOC_DAPM_DAC_E("HFDAC Right", "Handsfree Playback",
+ TWL6040_REG_HFRCTL, 0, 0,
+ twl6040_power_mode_event,
+ SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_POST_PMD),
+
+ /* Analog playback switches */
+ SND_SOC_DAPM_SWITCH("HSDAC Left Playback",
+ SND_SOC_NOPM, 0, 0, &hsdacl_switch_controls),
+ SND_SOC_DAPM_SWITCH("HSDAC Right Playback",
+ SND_SOC_NOPM, 0, 0, &hsdacr_switch_controls),
+ SND_SOC_DAPM_SWITCH("HFDAC Left Playback",
+ SND_SOC_NOPM, 0, 0, &hfdacl_switch_controls),
+ SND_SOC_DAPM_SWITCH("HFDAC Right Playback",
+ SND_SOC_NOPM, 0, 0, &hfdacr_switch_controls),
+
+ SND_SOC_DAPM_SWITCH("Headset Left Driver",
+ SND_SOC_NOPM, 0, 0, &hsl_driver_switch_controls),
+ SND_SOC_DAPM_SWITCH("Headset Right Driver",
+ SND_SOC_NOPM, 0, 0, &hsr_driver_switch_controls),
+ SND_SOC_DAPM_SWITCH_E("Handsfree Left Driver",
+ SND_SOC_NOPM, 0, 0, &hfl_driver_switch_controls,
+ twl6040_power_mode_event,
+ SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_POST_PMD),
+ SND_SOC_DAPM_SWITCH_E("Handsfree Right Driver",
+ SND_SOC_NOPM, 0, 0, &hfr_driver_switch_controls,
+ twl6040_power_mode_event,
+ SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_POST_PMD),
+
+ /* Analog playback PGAs */
+ SND_SOC_DAPM_PGA("HFDAC Left PGA",
+ TWL6040_REG_HFLCTL, 1, 0, NULL, 0),
+ SND_SOC_DAPM_PGA("HFDAC Right PGA",
+ TWL6040_REG_HFRCTL, 1, 0, NULL, 0),
+
+};
+
+static const struct snd_soc_dapm_route intercon[] = {
+ /* Capture path */
+ {"Analog Left Capture Route", "Headset Mic", "HSMIC"},
+ {"Analog Left Capture Route", "Main Mic", "MAINMIC"},
+ {"Analog Left Capture Route", "Aux/FM Left", "AFML"},
+
+ {"Analog Right Capture Route", "Headset Mic", "HSMIC"},
+ {"Analog Right Capture Route", "Sub Mic", "SUBMIC"},
+ {"Analog Right Capture Route", "Aux/FM Right", "AFMR"},
+
+ {"MicAmpL", NULL, "Analog Left Capture Route"},
+ {"MicAmpR", NULL, "Analog Right Capture Route"},
+
+ {"ADC Left", NULL, "MicAmpL"},
+ {"ADC Right", NULL, "MicAmpR"},
+
+ /* Headset playback path */
+ {"HSDAC Left Playback", "Switch", "HSDAC Left"},
+ {"HSDAC Right Playback", "Switch", "HSDAC Right"},
+
+ {"Headset Left Driver", "Switch", "HSDAC Left Playback"},
+ {"Headset Right Driver", "Switch", "HSDAC Right Playback"},
+
+ {"HSOL", NULL, "Headset Left Driver"},
+ {"HSOR", NULL, "Headset Right Driver"},
+
+ /* Handsfree playback path */
+ {"HFDAC Left Playback", "Switch", "HFDAC Left"},
+ {"HFDAC Right Playback", "Switch", "HFDAC Right"},
+
+ {"HFDAC Left PGA", NULL, "HFDAC Left Playback"},
+ {"HFDAC Right PGA", NULL, "HFDAC Right Playback"},
+
+ {"Handsfree Left Driver", "Switch", "HFDAC Left PGA"},
+ {"Handsfree Right Driver", "Switch", "HFDAC Right PGA"},
+
+ {"HFL", NULL, "Handsfree Left Driver"},
+ {"HFR", NULL, "Handsfree Right Driver"},
+};
+
+static int twl6040_add_widgets(struct snd_soc_codec *codec)
+{
+ snd_soc_dapm_new_controls(codec, twl6040_dapm_widgets,
+ ARRAY_SIZE(twl6040_dapm_widgets));
+
+ snd_soc_dapm_add_routes(codec, intercon, ARRAY_SIZE(intercon));
+
+ snd_soc_dapm_new_widgets(codec);
+
+ return 0;
+}
+
+static int twl6040_power_up_completion(struct snd_soc_codec *codec,
+ int naudint)
+{
+ struct twl6040_data *priv = codec->private_data;
+ int time_left;
+ u8 intid;
+
+ time_left = wait_for_completion_timeout(&priv->ready,
+ msecs_to_jiffies(48));
+
+ if (!time_left) {
+ twl_i2c_read_u8(TWL4030_MODULE_AUDIO_VOICE, &intid,
+ TWL6040_REG_INTID);
+ if (!(intid & TWL6040_READYINT)) {
+ dev_err(codec->dev, "timeout waiting for READYINT\n");
+ return -ETIMEDOUT;
+ }
+ }
+
+ priv->codec_powered = 1;
+
+ return 0;
+}
+
+static int twl6040_set_bias_level(struct snd_soc_codec *codec,
+ enum snd_soc_bias_level level)
+{
+ struct twl6040_data *priv = codec->private_data;
+ int audpwron = priv->audpwron;
+ int naudint = priv->naudint;
+ int ret;
+
+ switch (level) {
+ case SND_SOC_BIAS_ON:
+ break;
+ case SND_SOC_BIAS_PREPARE:
+ break;
+ case SND_SOC_BIAS_STANDBY:
+ if (priv->codec_powered)
+ break;
+
+ if (gpio_is_valid(audpwron)) {
+ /* use AUDPWRON line */
+ gpio_set_value(audpwron, 1);
+
+ /* wait for power-up completion */
+ ret = twl6040_power_up_completion(codec, naudint);
+ if (ret)
+ return ret;
+
+ /* sync registers updated during power-up sequence */
+ twl6040_read_reg_volatile(codec, TWL6040_REG_NCPCTL);
+ twl6040_read_reg_volatile(codec, TWL6040_REG_LDOCTL);
+ twl6040_read_reg_volatile(codec, TWL6040_REG_LPPLLCTL);
+ } else {
+ /* use manual power-up sequence */
+ twl6040_power_up(codec);
+ priv->codec_powered = 1;
+ }
+
+ /* initialize vdd/vss registers with reg_cache */
+ twl6040_init_vdd_regs(codec);
+ break;
+ case SND_SOC_BIAS_OFF:
+ if (!priv->codec_powered)
+ break;
+
+ if (gpio_is_valid(audpwron)) {
+ /* use AUDPWRON line */
+ gpio_set_value(audpwron, 0);
+
+ /* power-down sequence latency */
+ udelay(500);
+
+ /* sync registers updated during power-down sequence */
+ twl6040_read_reg_volatile(codec, TWL6040_REG_NCPCTL);
+ twl6040_read_reg_volatile(codec, TWL6040_REG_LDOCTL);
+ twl6040_write_reg_cache(codec, TWL6040_REG_LPPLLCTL,
+ 0x00);
+ } else {
+ /* use manual power-down sequence */
+ twl6040_power_down(codec);
+ }
+
+ priv->codec_powered = 0;
+ break;
+ }
+
+ codec->bias_level = level;
+
+ return 0;
+}
+
+/* set of rates for each pll: low-power and high-performance */
+
+static unsigned int lp_rates[] = {
+ 88200,
+ 96000,
+};
+
+static struct snd_pcm_hw_constraint_list lp_constraints = {
+ .count = ARRAY_SIZE(lp_rates),
+ .list = lp_rates,
+};
+
+static unsigned int hp_rates[] = {
+ 96000,
+};
+
+static struct snd_pcm_hw_constraint_list hp_constraints = {
+ .count = ARRAY_SIZE(hp_rates),
+ .list = hp_rates,
+};
+
+static int twl6040_startup(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct snd_soc_device *socdev = rtd->socdev;
+ struct snd_soc_codec *codec = socdev->card->codec;
+ struct twl6040_data *priv = codec->private_data;
+
+ if (!priv->sysclk) {
+ dev_err(codec->dev,
+ "no mclk configured, call set_sysclk() on init\n");
+ return -EINVAL;
+ }
+
+ /*
+ * capture is not supported at 17.64 MHz,
+ * it's reserved for headset low-power playback scenario
+ */
+ if ((priv->sysclk == 17640000) && substream->stream) {
+ dev_err(codec->dev,
+ "capture mode is not supported at %dHz\n",
+ priv->sysclk);
+ return -EINVAL;
+ }
+
+ snd_pcm_hw_constraint_list(substream->runtime, 0,
+ SNDRV_PCM_HW_PARAM_RATE,
+ priv->sysclk_constraints);
+
+ return 0;
+}
+
+static int twl6040_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params,
+ struct snd_soc_dai *dai)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct snd_soc_device *socdev = rtd->socdev;
+ struct snd_soc_codec *codec = socdev->card->codec;
+ struct twl6040_data *priv = codec->private_data;
+ u8 lppllctl;
+ int rate;
+
+ /* nothing to do for high-perf pll, it supports only 48 kHz */
+ if (priv->pll == TWL6040_HPPLL_ID)
+ return 0;
+
+ lppllctl = twl6040_read_reg_cache(codec, TWL6040_REG_LPPLLCTL);
+
+ rate = params_rate(params);
+ switch (rate) {
+ case 88200:
+ lppllctl |= TWL6040_LPLLFIN;
+ priv->sysclk = 17640000;
+ break;
+ case 96000:
+ lppllctl &= ~TWL6040_LPLLFIN;
+ priv->sysclk = 19200000;
+ break;
+ default:
+ dev_err(codec->dev, "unsupported rate %d\n", rate);
+ return -EINVAL;
+ }
+
+ twl6040_write(codec, TWL6040_REG_LPPLLCTL, lppllctl);
+
+ return 0;
+}
+
+static int twl6040_trigger(struct snd_pcm_substream *substream,
+ int cmd, struct snd_soc_dai *dai)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct snd_soc_device *socdev = rtd->socdev;
+ struct snd_soc_codec *codec = socdev->card->codec;
+ struct twl6040_data *priv = codec->private_data;
+
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ case SNDRV_PCM_TRIGGER_RESUME:
+ /*
+ * low-power playback mode is restricted
+ * for headset path only
+ */
+ if ((priv->sysclk == 17640000) && priv->non_lp) {
+ dev_err(codec->dev,
+ "some enabled paths aren't supported at %dHz\n",
+ priv->sysclk);
+ return -EPERM;
+ }
+ break;
+ default:
+ break;
+ }
+
+ return 0;
+}
+
+static int twl6040_set_dai_sysclk(struct snd_soc_dai *codec_dai,
+ int clk_id, unsigned int freq, int dir)
+{
+ struct snd_soc_codec *codec = codec_dai->codec;
+ struct twl6040_data *priv = codec->private_data;
+ u8 hppllctl, lppllctl;
+
+ hppllctl = twl6040_read_reg_cache(codec, TWL6040_REG_HPPLLCTL);
+ lppllctl = twl6040_read_reg_cache(codec, TWL6040_REG_LPPLLCTL);
+
+ switch (clk_id) {
+ case TWL6040_SYSCLK_SEL_LPPLL:
+ switch (freq) {
+ case 32768:
+ /* headset dac and driver must be in low-power mode */
+ headset_power_mode(codec, 0);
+
+ /* clk32k input requires low-power pll */
+ lppllctl |= TWL6040_LPLLENA;
+ twl6040_write(codec, TWL6040_REG_LPPLLCTL, lppllctl);
+ mdelay(5);
+ lppllctl &= ~TWL6040_HPLLSEL;
+ twl6040_write(codec, TWL6040_REG_LPPLLCTL, lppllctl);
+ hppllctl &= ~TWL6040_HPLLENA;
+ twl6040_write(codec, TWL6040_REG_HPPLLCTL, hppllctl);
+ break;
+ default:
+ dev_err(codec->dev, "unknown mclk freq %d\n", freq);
+ return -EINVAL;
+ }
+
+ /* lppll divider */
+ switch (priv->sysclk) {
+ case 17640000:
+ lppllctl |= TWL6040_LPLLFIN;
+ break;
+ case 19200000:
+ lppllctl &= ~TWL6040_LPLLFIN;
+ break;
+ default:
+ /* sysclk not yet configured */
+ lppllctl &= ~TWL6040_LPLLFIN;
+ priv->sysclk = 19200000;
+ break;
+ }
+
+ twl6040_write(codec, TWL6040_REG_LPPLLCTL, lppllctl);
+
+ priv->pll = TWL6040_LPPLL_ID;
+ priv->sysclk_constraints = &lp_constraints;
+ break;
+ case TWL6040_SYSCLK_SEL_HPPLL:
+ hppllctl &= ~TWL6040_MCLK_MSK;
+
+ switch (freq) {
+ case 12000000:
+ /* mclk input, pll enabled */
+ hppllctl |= TWL6040_MCLK_12000KHZ |
+ TWL6040_HPLLSQRBP |
+ TWL6040_HPLLENA;
+ break;
+ case 19200000:
+ /* mclk input, pll disabled */
+ hppllctl |= TWL6040_MCLK_19200KHZ |
+ TWL6040_HPLLSQRBP |
+ TWL6040_HPLLBP;
+ break;
+ case 26000000:
+ /* mclk input, pll enabled */
+ hppllctl |= TWL6040_MCLK_26000KHZ |
+ TWL6040_HPLLSQRBP |
+ TWL6040_HPLLENA;
+ break;
+ case 38400000:
+ /* clk slicer, pll disabled */
+ hppllctl |= TWL6040_MCLK_38400KHZ |
+ TWL6040_HPLLSQRENA |
+ TWL6040_HPLLBP;
+ break;
+ default:
+ dev_err(codec->dev, "unknown mclk freq %d\n", freq);
+ return -EINVAL;
+ }
+
+ /* headset dac and driver must be in high-performance mode */
+ headset_power_mode(codec, 1);
+
+ twl6040_write(codec, TWL6040_REG_HPPLLCTL, hppllctl);
+ udelay(500);
+ lppllctl |= TWL6040_HPLLSEL;
+ twl6040_write(codec, TWL6040_REG_LPPLLCTL, lppllctl);
+ lppllctl &= ~TWL6040_LPLLENA;
+ twl6040_write(codec, TWL6040_REG_LPPLLCTL, lppllctl);
+
+ /* high-performance pll can provide only 19.2 MHz */
+ priv->pll = TWL6040_HPPLL_ID;
+ priv->sysclk = 19200000;
+ priv->sysclk_constraints = &hp_constraints;
+ break;
+ default:
+ dev_err(codec->dev, "unknown clk_id %d\n", clk_id);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static struct snd_soc_dai_ops twl6040_dai_ops = {
+ .startup = twl6040_startup,
+ .hw_params = twl6040_hw_params,
+ .trigger = twl6040_trigger,
+ .set_sysclk = twl6040_set_dai_sysclk,
+};
+
+struct snd_soc_dai twl6040_dai = {
+ .name = "twl6040",
+ .playback = {
+ .stream_name = "Playback",
+ .channels_min = 1,
+ .channels_max = 4,
+ .rates = TWL6040_RATES,
+ .formats = TWL6040_FORMATS,
+ },
+ .capture = {
+ .stream_name = "Capture",
+ .channels_min = 1,
+ .channels_max = 2,
+ .rates = TWL6040_RATES,
+ .formats = TWL6040_FORMATS,
+ },
+ .ops = &twl6040_dai_ops,
+};
+EXPORT_SYMBOL_GPL(twl6040_dai);
+
+#ifdef CONFIG_PM
+static int twl6040_suspend(struct platform_device *pdev, pm_message_t state)
+{
+ struct snd_soc_device *socdev = platform_get_drvdata(pdev);
+ struct snd_soc_codec *codec = socdev->card->codec;
+
+ twl6040_set_bias_level(codec, SND_SOC_BIAS_OFF);
+
+ return 0;
+}
+
+static int twl6040_resume(struct platform_device *pdev)
+{
+ struct snd_soc_device *socdev = platform_get_drvdata(pdev);
+ struct snd_soc_codec *codec = socdev->card->codec;
+
+ twl6040_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
+ twl6040_set_bias_level(codec, codec->suspend_bias_level);
+
+ return 0;
+}
+#else
+#define twl6040_suspend NULL
+#define twl6040_resume NULL
+#endif
+
+static struct snd_soc_codec *twl6040_codec;
+
+static int twl6040_probe(struct platform_device *pdev)
+{
+ struct snd_soc_device *socdev = platform_get_drvdata(pdev);
+ struct snd_soc_codec *codec;
+ int ret = 0;
+
+ BUG_ON(!twl6040_codec);
+
+ codec = twl6040_codec;
+ socdev->card->codec = codec;
+
+ /* register pcms */
+ ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "failed to create pcms\n");
+ return ret;
+ }
+
+ snd_soc_add_controls(codec, twl6040_snd_controls,
+ ARRAY_SIZE(twl6040_snd_controls));
+ twl6040_add_widgets(codec);
+
+ if (ret < 0) {
+ dev_err(&pdev->dev, "failed to register card\n");
+ goto card_err;
+ }
+
+ return ret;
+
+card_err:
+ snd_soc_free_pcms(socdev);
+ snd_soc_dapm_free(socdev);
+ return ret;
+}
+
+static int twl6040_remove(struct platform_device *pdev)
+{
+ struct snd_soc_device *socdev = platform_get_drvdata(pdev);
+ struct snd_soc_codec *codec = socdev->card->codec;
+
+ twl6040_set_bias_level(codec, SND_SOC_BIAS_OFF);
+ snd_soc_free_pcms(socdev);
+ snd_soc_dapm_free(socdev);
+ kfree(codec);
+
+ return 0;
+}
+
+struct snd_soc_codec_device soc_codec_dev_twl6040 = {
+ .probe = twl6040_probe,
+ .remove = twl6040_remove,
+ .suspend = twl6040_suspend,
+ .resume = twl6040_resume,
+};
+EXPORT_SYMBOL_GPL(soc_codec_dev_twl6040);
+
+static int __devinit twl6040_codec_probe(struct platform_device *pdev)
+{
+ struct twl4030_codec_data *twl_codec = pdev->dev.platform_data;
+ struct snd_soc_codec *codec;
+ struct twl6040_data *priv;
+ int audpwron, naudint;
+ int ret = 0;
+
+ priv = kzalloc(sizeof(struct twl6040_data), GFP_KERNEL);
+ if (priv == NULL)
+ return -ENOMEM;
+
+ if (twl_codec) {
+ audpwron = twl_codec->audpwron_gpio;
+ naudint = twl_codec->naudint_irq;
+ } else {
+ audpwron = -EINVAL;
+ naudint = 0;
+ }
+
+ priv->audpwron = audpwron;
+ priv->naudint = naudint;
+
+ codec = &priv->codec;
+ codec->dev = &pdev->dev;
+ twl6040_dai.dev = &pdev->dev;
+
+ codec->name = "twl6040";
+ codec->owner = THIS_MODULE;
+ codec->read = twl6040_read_reg_cache;
+ codec->write = twl6040_write;
+ codec->set_bias_level = twl6040_set_bias_level;
+ codec->private_data = priv;
+ codec->dai = &twl6040_dai;
+ codec->num_dai = 1;
+ codec->reg_cache_size = ARRAY_SIZE(twl6040_reg);
+ codec->reg_cache = kmemdup(twl6040_reg, sizeof(twl6040_reg),
+ GFP_KERNEL);
+ if (codec->reg_cache == NULL) {
+ ret = -ENOMEM;
+ goto cache_err;
+ }
+
+ mutex_init(&codec->mutex);
+ INIT_LIST_HEAD(&codec->dapm_widgets);
+ INIT_LIST_HEAD(&codec->dapm_paths);
+ init_completion(&priv->ready);
+
+ if (gpio_is_valid(audpwron)) {
+ ret = gpio_request(audpwron, "audpwron");
+ if (ret)
+ goto gpio1_err;
+
+ ret = gpio_direction_output(audpwron, 0);
+ if (ret)
+ goto gpio2_err;
+
+ priv->codec_powered = 0;
+ }
+
+ if (naudint) {
+ /* audio interrupt */
+ ret = request_threaded_irq(naudint, NULL,
+ twl6040_naudint_handler,
+ IRQF_TRIGGER_LOW | IRQF_ONESHOT,
+ "twl6040_codec", codec);
+ if (ret)
+ goto gpio2_err;
+ } else {
+ if (gpio_is_valid(audpwron)) {
+ /* enable only codec ready interrupt */
+ twl6040_write_reg_cache(codec, TWL6040_REG_INTMR,
+ ~TWL6040_READYMSK & TWL6040_ALLINT_MSK);
+ } else {
+ /* no interrupts at all */
+ twl6040_write_reg_cache(codec, TWL6040_REG_INTMR,
+ TWL6040_ALLINT_MSK);
+ }
+ }
+
+ /* init vio registers */
+ twl6040_init_vio_regs(codec);
+
+ /* power on device */
+ ret = twl6040_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
+ if (ret)
+ goto irq_err;
+
+ ret = snd_soc_register_codec(codec);
+ if (ret)
+ goto reg_err;
+
+ twl6040_codec = codec;
+
+ ret = snd_soc_register_dai(&twl6040_dai);
+ if (ret)
+ goto dai_err;
+
+ return 0;
+
+dai_err:
+ snd_soc_unregister_codec(codec);
+ twl6040_codec = NULL;
+reg_err:
+ twl6040_set_bias_level(codec, SND_SOC_BIAS_OFF);
+irq_err:
+ if (naudint)
+ free_irq(naudint, codec);
+gpio2_err:
+ if (gpio_is_valid(audpwron))
+ gpio_free(audpwron);
+gpio1_err:
+ kfree(codec->reg_cache);
+cache_err:
+ kfree(priv);
+ return ret;
+}
+
+static int __devexit twl6040_codec_remove(struct platform_device *pdev)
+{
+ struct twl6040_data *priv = twl6040_codec->private_data;
+ int audpwron = priv->audpwron;
+ int naudint = priv->naudint;
+
+ if (gpio_is_valid(audpwron))
+ gpio_free(audpwron);
+
+ if (naudint)
+ free_irq(naudint, twl6040_codec);
+
+ snd_soc_unregister_dai(&twl6040_dai);
+ snd_soc_unregister_codec(twl6040_codec);
+
+ kfree(twl6040_codec);
+ twl6040_codec = NULL;
+
+ return 0;
+}
+
+static struct platform_driver twl6040_codec_driver = {
+ .driver = {
+ .name = "twl6040_codec",
+ .owner = THIS_MODULE,
+ },
+ .probe = twl6040_codec_probe,
+ .remove = __devexit_p(twl6040_codec_remove),
+};
+
+static int __init twl6040_codec_init(void)
+{
+ return platform_driver_register(&twl6040_codec_driver);
+}
+module_init(twl6040_codec_init);
+
+static void __exit twl6040_codec_exit(void)
+{
+ platform_driver_unregister(&twl6040_codec_driver);
+}
+module_exit(twl6040_codec_exit);
+
+MODULE_DESCRIPTION("ASoC TWL6040 codec driver");
+MODULE_AUTHOR("Misael Lopez Cruz");
+MODULE_LICENSE("GPL");