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-rw-r--r--sound/soc/codecs/sta32x.c917
1 files changed, 917 insertions, 0 deletions
diff --git a/sound/soc/codecs/sta32x.c b/sound/soc/codecs/sta32x.c
new file mode 100644
index 0000000..409d89d
--- /dev/null
+++ b/sound/soc/codecs/sta32x.c
@@ -0,0 +1,917 @@
+/*
+ * Codec driver for ST STA32x 2.1-channel high-efficiency digital audio system
+ *
+ * Copyright: 2011 Raumfeld GmbH
+ * Author: Johannes Stezenbach <js@sig21.net>
+ *
+ * based on code from:
+ * Wolfson Microelectronics PLC.
+ * Mark Brown <broonie@opensource.wolfsonmicro.com>
+ * Freescale Semiconductor, Inc.
+ * Timur Tabi <timur@freescale.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ":%s:%d: " fmt, __func__, __LINE__
+
+#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/platform_device.h>
+#include <linux/regulator/consumer.h>
+#include <linux/slab.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 "sta32x.h"
+
+#define STA32X_RATES (SNDRV_PCM_RATE_32000 | \
+ SNDRV_PCM_RATE_44100 | \
+ SNDRV_PCM_RATE_48000 | \
+ SNDRV_PCM_RATE_88200 | \
+ SNDRV_PCM_RATE_96000 | \
+ SNDRV_PCM_RATE_176400 | \
+ SNDRV_PCM_RATE_192000)
+
+#define STA32X_FORMATS \
+ (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE | \
+ SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S18_3BE | \
+ SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE | \
+ SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S24_3BE | \
+ SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE | \
+ SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE)
+
+/* Power-up register defaults */
+static const u8 sta32x_regs[STA32X_REGISTER_COUNT] = {
+ 0x63, 0x80, 0xc2, 0x40, 0xc2, 0x5c, 0x10, 0xff, 0x60, 0x60,
+ 0x60, 0x80, 0x00, 0x00, 0x00, 0x40, 0x80, 0x77, 0x6a, 0x69,
+ 0x6a, 0x69, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x2d,
+ 0xc0, 0xf3, 0x33, 0x00, 0x0c,
+};
+
+/* regulator power supply names */
+static const char *sta32x_supply_names[] = {
+ "Vdda", /* analog supply, 3.3VV */
+ "Vdd3", /* digital supply, 3.3V */
+ "Vcc" /* power amp spply, 10V - 36V */
+};
+
+/* codec private data */
+struct sta32x_priv {
+ struct regulator_bulk_data supplies[ARRAY_SIZE(sta32x_supply_names)];
+ struct snd_soc_codec *codec;
+
+ unsigned int mclk;
+ unsigned int format;
+};
+
+static const DECLARE_TLV_DB_SCALE(mvol_tlv, -12700, 50, 1);
+static const DECLARE_TLV_DB_SCALE(chvol_tlv, -7950, 50, 1);
+static const DECLARE_TLV_DB_SCALE(tone_tlv, -120, 200, 0);
+
+static const char *sta32x_drc_ac[] = {
+ "Anti-Clipping", "Dynamic Range Compression" };
+static const char *sta32x_auto_eq_mode[] = {
+ "User", "Preset", "Loudness" };
+static const char *sta32x_auto_gc_mode[] = {
+ "User", "AC no clipping", "AC limited clipping (10%)",
+ "DRC nighttime listening mode" };
+static const char *sta32x_auto_xo_mode[] = {
+ "User", "80Hz", "100Hz", "120Hz", "140Hz", "160Hz", "180Hz", "200Hz",
+ "220Hz", "240Hz", "260Hz", "280Hz", "300Hz", "320Hz", "340Hz", "360Hz" };
+static const char *sta32x_preset_eq_mode[] = {
+ "Flat", "Rock", "Soft Rock", "Jazz", "Classical", "Dance", "Pop", "Soft",
+ "Hard", "Party", "Vocal", "Hip-Hop", "Dialog", "Bass-boost #1",
+ "Bass-boost #2", "Bass-boost #3", "Loudness 1", "Loudness 2",
+ "Loudness 3", "Loudness 4", "Loudness 5", "Loudness 6", "Loudness 7",
+ "Loudness 8", "Loudness 9", "Loudness 10", "Loudness 11", "Loudness 12",
+ "Loudness 13", "Loudness 14", "Loudness 15", "Loudness 16" };
+static const char *sta32x_limiter_select[] = {
+ "Limiter Disabled", "Limiter #1", "Limiter #2" };
+static const char *sta32x_limiter_attack_rate[] = {
+ "3.1584", "2.7072", "2.2560", "1.8048", "1.3536", "0.9024",
+ "0.4512", "0.2256", "0.1504", "0.1123", "0.0902", "0.0752",
+ "0.0645", "0.0564", "0.0501", "0.0451" };
+static const char *sta32x_limiter_release_rate[] = {
+ "0.5116", "0.1370", "0.0744", "0.0499", "0.0360", "0.0299",
+ "0.0264", "0.0208", "0.0198", "0.0172", "0.0147", "0.0137",
+ "0.0134", "0.0117", "0.0110", "0.0104" };
+
+static const unsigned int sta32x_limiter_ac_attack_tlv[] = {
+ TLV_DB_RANGE_HEAD(2),
+ 0, 7, TLV_DB_SCALE_ITEM(-1200, 200, 0),
+ 8, 16, TLV_DB_SCALE_ITEM(300, 100, 0),
+};
+
+static const unsigned int sta32x_limiter_ac_release_tlv[] = {
+ TLV_DB_RANGE_HEAD(5),
+ 0, 0, TLV_DB_SCALE_ITEM(TLV_DB_GAIN_MUTE, 0, 0),
+ 1, 1, TLV_DB_SCALE_ITEM(-2900, 0, 0),
+ 2, 2, TLV_DB_SCALE_ITEM(-2000, 0, 0),
+ 3, 8, TLV_DB_SCALE_ITEM(-1400, 200, 0),
+ 8, 16, TLV_DB_SCALE_ITEM(-700, 100, 0),
+};
+
+static const unsigned int sta32x_limiter_drc_attack_tlv[] = {
+ TLV_DB_RANGE_HEAD(3),
+ 0, 7, TLV_DB_SCALE_ITEM(-3100, 200, 0),
+ 8, 13, TLV_DB_SCALE_ITEM(-1600, 100, 0),
+ 14, 16, TLV_DB_SCALE_ITEM(-1000, 300, 0),
+};
+
+static const unsigned int sta32x_limiter_drc_release_tlv[] = {
+ TLV_DB_RANGE_HEAD(5),
+ 0, 0, TLV_DB_SCALE_ITEM(TLV_DB_GAIN_MUTE, 0, 0),
+ 1, 2, TLV_DB_SCALE_ITEM(-3800, 200, 0),
+ 3, 4, TLV_DB_SCALE_ITEM(-3300, 200, 0),
+ 5, 12, TLV_DB_SCALE_ITEM(-3000, 200, 0),
+ 13, 16, TLV_DB_SCALE_ITEM(-1500, 300, 0),
+};
+
+static const struct soc_enum sta32x_drc_ac_enum =
+ SOC_ENUM_SINGLE(STA32X_CONFD, STA32X_CONFD_DRC_SHIFT,
+ 2, sta32x_drc_ac);
+static const struct soc_enum sta32x_auto_eq_enum =
+ SOC_ENUM_SINGLE(STA32X_AUTO1, STA32X_AUTO1_AMEQ_SHIFT,
+ 3, sta32x_auto_eq_mode);
+static const struct soc_enum sta32x_auto_gc_enum =
+ SOC_ENUM_SINGLE(STA32X_AUTO1, STA32X_AUTO1_AMGC_SHIFT,
+ 4, sta32x_auto_gc_mode);
+static const struct soc_enum sta32x_auto_xo_enum =
+ SOC_ENUM_SINGLE(STA32X_AUTO2, STA32X_AUTO2_XO_SHIFT,
+ 16, sta32x_auto_xo_mode);
+static const struct soc_enum sta32x_preset_eq_enum =
+ SOC_ENUM_SINGLE(STA32X_AUTO3, STA32X_AUTO3_PEQ_SHIFT,
+ 32, sta32x_preset_eq_mode);
+static const struct soc_enum sta32x_limiter_ch1_enum =
+ SOC_ENUM_SINGLE(STA32X_C1CFG, STA32X_CxCFG_LS_SHIFT,
+ 3, sta32x_limiter_select);
+static const struct soc_enum sta32x_limiter_ch2_enum =
+ SOC_ENUM_SINGLE(STA32X_C2CFG, STA32X_CxCFG_LS_SHIFT,
+ 3, sta32x_limiter_select);
+static const struct soc_enum sta32x_limiter_ch3_enum =
+ SOC_ENUM_SINGLE(STA32X_C3CFG, STA32X_CxCFG_LS_SHIFT,
+ 3, sta32x_limiter_select);
+static const struct soc_enum sta32x_limiter1_attack_rate_enum =
+ SOC_ENUM_SINGLE(STA32X_L1AR, STA32X_LxA_SHIFT,
+ 16, sta32x_limiter_attack_rate);
+static const struct soc_enum sta32x_limiter2_attack_rate_enum =
+ SOC_ENUM_SINGLE(STA32X_L2AR, STA32X_LxA_SHIFT,
+ 16, sta32x_limiter_attack_rate);
+static const struct soc_enum sta32x_limiter1_release_rate_enum =
+ SOC_ENUM_SINGLE(STA32X_L1AR, STA32X_LxR_SHIFT,
+ 16, sta32x_limiter_release_rate);
+static const struct soc_enum sta32x_limiter2_release_rate_enum =
+ SOC_ENUM_SINGLE(STA32X_L2AR, STA32X_LxR_SHIFT,
+ 16, sta32x_limiter_release_rate);
+
+/* byte array controls for setting biquad, mixer, scaling coefficients;
+ * for biquads all five coefficients need to be set in one go,
+ * mixer and pre/postscale coefs can be set individually;
+ * each coef is 24bit, the bytes are ordered in the same way
+ * as given in the STA32x data sheet (big endian; b1, b2, a1, a2, b0)
+ */
+
+static int sta32x_coefficient_info(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_info *uinfo)
+{
+ int numcoef = kcontrol->private_value >> 16;
+ uinfo->type = SNDRV_CTL_ELEM_TYPE_BYTES;
+ uinfo->count = 3 * numcoef;
+ return 0;
+}
+
+static int sta32x_coefficient_get(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
+ int numcoef = kcontrol->private_value >> 16;
+ int index = kcontrol->private_value & 0xffff;
+ unsigned int cfud;
+ int i;
+
+ /* preserve reserved bits in STA32X_CFUD */
+ cfud = snd_soc_read(codec, STA32X_CFUD) & 0xf0;
+ /* chip documentation does not say if the bits are self clearing,
+ * so do it explicitly */
+ snd_soc_write(codec, STA32X_CFUD, cfud);
+
+ snd_soc_write(codec, STA32X_CFADDR2, index);
+ if (numcoef == 1)
+ snd_soc_write(codec, STA32X_CFUD, cfud | 0x04);
+ else if (numcoef == 5)
+ snd_soc_write(codec, STA32X_CFUD, cfud | 0x08);
+ else
+ return -EINVAL;
+ for (i = 0; i < 3 * numcoef; i++)
+ ucontrol->value.bytes.data[i] =
+ snd_soc_read(codec, STA32X_B1CF1 + i);
+
+ return 0;
+}
+
+static int sta32x_coefficient_put(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
+ int numcoef = kcontrol->private_value >> 16;
+ int index = kcontrol->private_value & 0xffff;
+ unsigned int cfud;
+ int i;
+
+ /* preserve reserved bits in STA32X_CFUD */
+ cfud = snd_soc_read(codec, STA32X_CFUD) & 0xf0;
+ /* chip documentation does not say if the bits are self clearing,
+ * so do it explicitly */
+ snd_soc_write(codec, STA32X_CFUD, cfud);
+
+ snd_soc_write(codec, STA32X_CFADDR2, index);
+ for (i = 0; i < 3 * numcoef; i++)
+ snd_soc_write(codec, STA32X_B1CF1 + i,
+ ucontrol->value.bytes.data[i]);
+ if (numcoef == 1)
+ snd_soc_write(codec, STA32X_CFUD, cfud | 0x01);
+ else if (numcoef == 5)
+ snd_soc_write(codec, STA32X_CFUD, cfud | 0x02);
+ else
+ return -EINVAL;
+
+ return 0;
+}
+
+#define SINGLE_COEF(xname, index) \
+{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, \
+ .info = sta32x_coefficient_info, \
+ .get = sta32x_coefficient_get,\
+ .put = sta32x_coefficient_put, \
+ .private_value = index | (1 << 16) }
+
+#define BIQUAD_COEFS(xname, index) \
+{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, \
+ .info = sta32x_coefficient_info, \
+ .get = sta32x_coefficient_get,\
+ .put = sta32x_coefficient_put, \
+ .private_value = index | (5 << 16) }
+
+static const struct snd_kcontrol_new sta32x_snd_controls[] = {
+SOC_SINGLE_TLV("Master Volume", STA32X_MVOL, 0, 0xff, 1, mvol_tlv),
+SOC_SINGLE("Master Switch", STA32X_MMUTE, 0, 1, 1),
+SOC_SINGLE("Ch1 Switch", STA32X_MMUTE, 1, 1, 1),
+SOC_SINGLE("Ch2 Switch", STA32X_MMUTE, 2, 1, 1),
+SOC_SINGLE("Ch3 Switch", STA32X_MMUTE, 3, 1, 1),
+SOC_SINGLE_TLV("Ch1 Volume", STA32X_C1VOL, 0, 0xff, 1, chvol_tlv),
+SOC_SINGLE_TLV("Ch2 Volume", STA32X_C2VOL, 0, 0xff, 1, chvol_tlv),
+SOC_SINGLE_TLV("Ch3 Volume", STA32X_C3VOL, 0, 0xff, 1, chvol_tlv),
+SOC_SINGLE("De-emphasis Filter Switch", STA32X_CONFD, STA32X_CONFD_DEMP_SHIFT, 1, 0),
+SOC_ENUM("Compressor/Limiter Switch", sta32x_drc_ac_enum),
+SOC_SINGLE("Miami Mode Switch", STA32X_CONFD, STA32X_CONFD_MME_SHIFT, 1, 0),
+SOC_SINGLE("Zero Cross Switch", STA32X_CONFE, STA32X_CONFE_ZCE_SHIFT, 1, 0),
+SOC_SINGLE("Soft Ramp Switch", STA32X_CONFE, STA32X_CONFE_SVE_SHIFT, 1, 0),
+SOC_SINGLE("Auto-Mute Switch", STA32X_CONFF, STA32X_CONFF_IDE_SHIFT, 1, 0),
+SOC_ENUM("Automode EQ", sta32x_auto_eq_enum),
+SOC_ENUM("Automode GC", sta32x_auto_gc_enum),
+SOC_ENUM("Automode XO", sta32x_auto_xo_enum),
+SOC_ENUM("Preset EQ", sta32x_preset_eq_enum),
+SOC_SINGLE("Ch1 Tone Control Bypass Switch", STA32X_C1CFG, STA32X_CxCFG_TCB_SHIFT, 1, 0),
+SOC_SINGLE("Ch2 Tone Control Bypass Switch", STA32X_C2CFG, STA32X_CxCFG_TCB_SHIFT, 1, 0),
+SOC_SINGLE("Ch1 EQ Bypass Switch", STA32X_C1CFG, STA32X_CxCFG_EQBP_SHIFT, 1, 0),
+SOC_SINGLE("Ch2 EQ Bypass Switch", STA32X_C2CFG, STA32X_CxCFG_EQBP_SHIFT, 1, 0),
+SOC_SINGLE("Ch1 Master Volume Bypass Switch", STA32X_C1CFG, STA32X_CxCFG_VBP_SHIFT, 1, 0),
+SOC_SINGLE("Ch2 Master Volume Bypass Switch", STA32X_C1CFG, STA32X_CxCFG_VBP_SHIFT, 1, 0),
+SOC_SINGLE("Ch3 Master Volume Bypass Switch", STA32X_C1CFG, STA32X_CxCFG_VBP_SHIFT, 1, 0),
+SOC_ENUM("Ch1 Limiter Select", sta32x_limiter_ch1_enum),
+SOC_ENUM("Ch2 Limiter Select", sta32x_limiter_ch2_enum),
+SOC_ENUM("Ch3 Limiter Select", sta32x_limiter_ch3_enum),
+SOC_SINGLE_TLV("Bass Tone Control", STA32X_TONE, STA32X_TONE_BTC_SHIFT, 15, 0, tone_tlv),
+SOC_SINGLE_TLV("Treble Tone Control", STA32X_TONE, STA32X_TONE_TTC_SHIFT, 15, 0, tone_tlv),
+SOC_ENUM("Limiter1 Attack Rate (dB/ms)", sta32x_limiter1_attack_rate_enum),
+SOC_ENUM("Limiter2 Attack Rate (dB/ms)", sta32x_limiter2_attack_rate_enum),
+SOC_ENUM("Limiter1 Release Rate (dB/ms)", sta32x_limiter1_release_rate_enum),
+SOC_ENUM("Limiter2 Release Rate (dB/ms)", sta32x_limiter1_release_rate_enum),
+
+/* depending on mode, the attack/release thresholds have
+ * two different enum definitions; provide both
+ */
+SOC_SINGLE_TLV("Limiter1 Attack Threshold (AC Mode)", STA32X_L1ATRT, STA32X_LxA_SHIFT,
+ 16, 0, sta32x_limiter_ac_attack_tlv),
+SOC_SINGLE_TLV("Limiter2 Attack Threshold (AC Mode)", STA32X_L2ATRT, STA32X_LxA_SHIFT,
+ 16, 0, sta32x_limiter_ac_attack_tlv),
+SOC_SINGLE_TLV("Limiter1 Release Threshold (AC Mode)", STA32X_L1ATRT, STA32X_LxR_SHIFT,
+ 16, 0, sta32x_limiter_ac_release_tlv),
+SOC_SINGLE_TLV("Limiter2 Release Threshold (AC Mode)", STA32X_L2ATRT, STA32X_LxR_SHIFT,
+ 16, 0, sta32x_limiter_ac_release_tlv),
+SOC_SINGLE_TLV("Limiter1 Attack Threshold (DRC Mode)", STA32X_L1ATRT, STA32X_LxA_SHIFT,
+ 16, 0, sta32x_limiter_drc_attack_tlv),
+SOC_SINGLE_TLV("Limiter2 Attack Threshold (DRC Mode)", STA32X_L2ATRT, STA32X_LxA_SHIFT,
+ 16, 0, sta32x_limiter_drc_attack_tlv),
+SOC_SINGLE_TLV("Limiter1 Release Threshold (DRC Mode)", STA32X_L1ATRT, STA32X_LxR_SHIFT,
+ 16, 0, sta32x_limiter_drc_release_tlv),
+SOC_SINGLE_TLV("Limiter2 Release Threshold (DRC Mode)", STA32X_L2ATRT, STA32X_LxR_SHIFT,
+ 16, 0, sta32x_limiter_drc_release_tlv),
+
+BIQUAD_COEFS("Ch1 - Biquad 1", 0),
+BIQUAD_COEFS("Ch1 - Biquad 2", 5),
+BIQUAD_COEFS("Ch1 - Biquad 3", 10),
+BIQUAD_COEFS("Ch1 - Biquad 4", 15),
+BIQUAD_COEFS("Ch2 - Biquad 1", 20),
+BIQUAD_COEFS("Ch2 - Biquad 2", 25),
+BIQUAD_COEFS("Ch2 - Biquad 3", 30),
+BIQUAD_COEFS("Ch2 - Biquad 4", 35),
+BIQUAD_COEFS("High-pass", 40),
+BIQUAD_COEFS("Low-pass", 45),
+SINGLE_COEF("Ch1 - Prescale", 50),
+SINGLE_COEF("Ch2 - Prescale", 51),
+SINGLE_COEF("Ch1 - Postscale", 52),
+SINGLE_COEF("Ch2 - Postscale", 53),
+SINGLE_COEF("Ch3 - Postscale", 54),
+SINGLE_COEF("Thermal warning - Postscale", 55),
+SINGLE_COEF("Ch1 - Mix 1", 56),
+SINGLE_COEF("Ch1 - Mix 2", 57),
+SINGLE_COEF("Ch2 - Mix 1", 58),
+SINGLE_COEF("Ch2 - Mix 2", 59),
+SINGLE_COEF("Ch3 - Mix 1", 60),
+SINGLE_COEF("Ch3 - Mix 2", 61),
+};
+
+static const struct snd_soc_dapm_widget sta32x_dapm_widgets[] = {
+SND_SOC_DAPM_DAC("DAC", "Playback", SND_SOC_NOPM, 0, 0),
+SND_SOC_DAPM_OUTPUT("LEFT"),
+SND_SOC_DAPM_OUTPUT("RIGHT"),
+SND_SOC_DAPM_OUTPUT("SUB"),
+};
+
+static const struct snd_soc_dapm_route sta32x_dapm_routes[] = {
+ { "LEFT", NULL, "DAC" },
+ { "RIGHT", NULL, "DAC" },
+ { "SUB", NULL, "DAC" },
+};
+
+/* MCLK interpolation ratio per fs */
+static struct {
+ int fs;
+ int ir;
+} interpolation_ratios[] = {
+ { 32000, 0 },
+ { 44100, 0 },
+ { 48000, 0 },
+ { 88200, 1 },
+ { 96000, 1 },
+ { 176400, 2 },
+ { 192000, 2 },
+};
+
+/* MCLK to fs clock ratios */
+static struct {
+ int ratio;
+ int mcs;
+} mclk_ratios[3][7] = {
+ { { 768, 0 }, { 512, 1 }, { 384, 2 }, { 256, 3 },
+ { 128, 4 }, { 576, 5 }, { 0, 0 } },
+ { { 384, 2 }, { 256, 3 }, { 192, 4 }, { 128, 5 }, {64, 0 }, { 0, 0 } },
+ { { 384, 2 }, { 256, 3 }, { 192, 4 }, { 128, 5 }, {64, 0 }, { 0, 0 } },
+};
+
+
+/**
+ * sta32x_set_dai_sysclk - configure MCLK
+ * @codec_dai: the codec DAI
+ * @clk_id: the clock ID (ignored)
+ * @freq: the MCLK input frequency
+ * @dir: the clock direction (ignored)
+ *
+ * The value of MCLK is used to determine which sample rates are supported
+ * by the STA32X, based on the mclk_ratios table.
+ *
+ * This function must be called by the machine driver's 'startup' function,
+ * otherwise the list of supported sample rates will not be available in
+ * time for ALSA.
+ *
+ * For setups with variable MCLKs, pass 0 as 'freq' argument. This will cause
+ * theoretically possible sample rates to be enabled. Call it again with a
+ * proper value set one the external clock is set (most probably you would do
+ * that from a machine's driver 'hw_param' hook.
+ */
+static int sta32x_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 sta32x_priv *sta32x = snd_soc_codec_get_drvdata(codec);
+ int i, j, ir, fs;
+ unsigned int rates = 0;
+ unsigned int rate_min = -1;
+ unsigned int rate_max = 0;
+
+ pr_debug("mclk=%u\n", freq);
+ sta32x->mclk = freq;
+
+ if (sta32x->mclk) {
+ for (i = 0; i < ARRAY_SIZE(interpolation_ratios); i++) {
+ ir = interpolation_ratios[i].ir;
+ fs = interpolation_ratios[i].fs;
+ for (j = 0; mclk_ratios[ir][j].ratio; j++) {
+ if (mclk_ratios[ir][j].ratio * fs == freq) {
+ rates |= snd_pcm_rate_to_rate_bit(fs);
+ if (fs < rate_min)
+ rate_min = fs;
+ if (fs > rate_max)
+ rate_max = fs;
+ }
+ }
+ }
+ /* FIXME: soc should support a rate list */
+ rates &= ~SNDRV_PCM_RATE_KNOT;
+
+ if (!rates) {
+ dev_err(codec->dev, "could not find a valid sample rate\n");
+ return -EINVAL;
+ }
+ } else {
+ /* enable all possible rates */
+ rates = STA32X_RATES;
+ rate_min = 32000;
+ rate_max = 192000;
+ }
+
+ codec_dai->driver->playback.rates = rates;
+ codec_dai->driver->playback.rate_min = rate_min;
+ codec_dai->driver->playback.rate_max = rate_max;
+ return 0;
+}
+
+/**
+ * sta32x_set_dai_fmt - configure the codec for the selected audio format
+ * @codec_dai: the codec DAI
+ * @fmt: a SND_SOC_DAIFMT_x value indicating the data format
+ *
+ * This function takes a bitmask of SND_SOC_DAIFMT_x bits and programs the
+ * codec accordingly.
+ */
+static int sta32x_set_dai_fmt(struct snd_soc_dai *codec_dai,
+ unsigned int fmt)
+{
+ struct snd_soc_codec *codec = codec_dai->codec;
+ struct sta32x_priv *sta32x = snd_soc_codec_get_drvdata(codec);
+ u8 confb = snd_soc_read(codec, STA32X_CONFB);
+
+ pr_debug("\n");
+ confb &= ~(STA32X_CONFB_C1IM | STA32X_CONFB_C2IM);
+
+ switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
+ case SND_SOC_DAIFMT_CBS_CFS:
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
+ case SND_SOC_DAIFMT_I2S:
+ case SND_SOC_DAIFMT_RIGHT_J:
+ case SND_SOC_DAIFMT_LEFT_J:
+ sta32x->format = fmt & SND_SOC_DAIFMT_FORMAT_MASK;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
+ case SND_SOC_DAIFMT_NB_NF:
+ confb |= STA32X_CONFB_C2IM;
+ break;
+ case SND_SOC_DAIFMT_NB_IF:
+ confb |= STA32X_CONFB_C1IM;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ snd_soc_write(codec, STA32X_CONFB, confb);
+ return 0;
+}
+
+/**
+ * sta32x_hw_params - program the STA32X with the given hardware parameters.
+ * @substream: the audio stream
+ * @params: the hardware parameters to set
+ * @dai: the SOC DAI (ignored)
+ *
+ * This function programs the hardware with the values provided.
+ * Specifically, the sample rate and the data format.
+ */
+static int sta32x_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_codec *codec = rtd->codec;
+ struct sta32x_priv *sta32x = snd_soc_codec_get_drvdata(codec);
+ unsigned int rate;
+ int i, mcs = -1, ir = -1;
+ u8 confa, confb;
+
+ rate = params_rate(params);
+ pr_debug("rate: %u\n", rate);
+ for (i = 0; i < ARRAY_SIZE(interpolation_ratios); i++)
+ if (interpolation_ratios[i].fs == rate)
+ ir = interpolation_ratios[i].ir;
+ if (ir < 0)
+ return -EINVAL;
+ for (i = 0; mclk_ratios[ir][i].ratio; i++)
+ if (mclk_ratios[ir][i].ratio * rate == sta32x->mclk)
+ mcs = mclk_ratios[ir][i].mcs;
+ if (mcs < 0)
+ return -EINVAL;
+
+ confa = snd_soc_read(codec, STA32X_CONFA);
+ confa &= ~(STA32X_CONFA_MCS_MASK | STA32X_CONFA_IR_MASK);
+ confa |= (ir << STA32X_CONFA_IR_SHIFT) | (mcs << STA32X_CONFA_MCS_SHIFT);
+
+ confb = snd_soc_read(codec, STA32X_CONFB);
+ confb &= ~(STA32X_CONFB_SAI_MASK | STA32X_CONFB_SAIFB);
+ switch (params_format(params)) {
+ case SNDRV_PCM_FORMAT_S24_LE:
+ case SNDRV_PCM_FORMAT_S24_BE:
+ case SNDRV_PCM_FORMAT_S24_3LE:
+ case SNDRV_PCM_FORMAT_S24_3BE:
+ pr_debug("24bit\n");
+ /* fall through */
+ case SNDRV_PCM_FORMAT_S32_LE:
+ case SNDRV_PCM_FORMAT_S32_BE:
+ pr_debug("24bit or 32bit\n");
+ switch (sta32x->format) {
+ case SND_SOC_DAIFMT_I2S:
+ confb |= 0x0;
+ break;
+ case SND_SOC_DAIFMT_LEFT_J:
+ confb |= 0x1;
+ break;
+ case SND_SOC_DAIFMT_RIGHT_J:
+ confb |= 0x2;
+ break;
+ }
+
+ break;
+ case SNDRV_PCM_FORMAT_S20_3LE:
+ case SNDRV_PCM_FORMAT_S20_3BE:
+ pr_debug("20bit\n");
+ switch (sta32x->format) {
+ case SND_SOC_DAIFMT_I2S:
+ confb |= 0x4;
+ break;
+ case SND_SOC_DAIFMT_LEFT_J:
+ confb |= 0x5;
+ break;
+ case SND_SOC_DAIFMT_RIGHT_J:
+ confb |= 0x6;
+ break;
+ }
+
+ break;
+ case SNDRV_PCM_FORMAT_S18_3LE:
+ case SNDRV_PCM_FORMAT_S18_3BE:
+ pr_debug("18bit\n");
+ switch (sta32x->format) {
+ case SND_SOC_DAIFMT_I2S:
+ confb |= 0x8;
+ break;
+ case SND_SOC_DAIFMT_LEFT_J:
+ confb |= 0x9;
+ break;
+ case SND_SOC_DAIFMT_RIGHT_J:
+ confb |= 0xa;
+ break;
+ }
+
+ break;
+ case SNDRV_PCM_FORMAT_S16_LE:
+ case SNDRV_PCM_FORMAT_S16_BE:
+ pr_debug("16bit\n");
+ switch (sta32x->format) {
+ case SND_SOC_DAIFMT_I2S:
+ confb |= 0x0;
+ break;
+ case SND_SOC_DAIFMT_LEFT_J:
+ confb |= 0xd;
+ break;
+ case SND_SOC_DAIFMT_RIGHT_J:
+ confb |= 0xe;
+ break;
+ }
+
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ snd_soc_write(codec, STA32X_CONFA, confa);
+ snd_soc_write(codec, STA32X_CONFB, confb);
+ return 0;
+}
+
+/**
+ * sta32x_set_bias_level - DAPM callback
+ * @codec: the codec device
+ * @level: DAPM power level
+ *
+ * This is called by ALSA to put the codec into low power mode
+ * or to wake it up. If the codec is powered off completely
+ * all registers must be restored after power on.
+ */
+static int sta32x_set_bias_level(struct snd_soc_codec *codec,
+ enum snd_soc_bias_level level)
+{
+ int ret;
+ struct sta32x_priv *sta32x = snd_soc_codec_get_drvdata(codec);
+
+ pr_debug("level = %d\n", level);
+ switch (level) {
+ case SND_SOC_BIAS_ON:
+ break;
+
+ case SND_SOC_BIAS_PREPARE:
+ /* Full power on */
+ snd_soc_update_bits(codec, STA32X_CONFF,
+ STA32X_CONFF_PWDN | STA32X_CONFF_EAPD,
+ STA32X_CONFF_PWDN | STA32X_CONFF_EAPD);
+ break;
+
+ case SND_SOC_BIAS_STANDBY:
+ if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) {
+ ret = regulator_bulk_enable(ARRAY_SIZE(sta32x->supplies),
+ sta32x->supplies);
+ if (ret != 0) {
+ dev_err(codec->dev,
+ "Failed to enable supplies: %d\n", ret);
+ return ret;
+ }
+
+ snd_soc_cache_sync(codec);
+ }
+
+ /* Power up to mute */
+ /* FIXME */
+ snd_soc_update_bits(codec, STA32X_CONFF,
+ STA32X_CONFF_PWDN | STA32X_CONFF_EAPD,
+ STA32X_CONFF_PWDN | STA32X_CONFF_EAPD);
+
+ break;
+
+ case SND_SOC_BIAS_OFF:
+ /* The chip runs through the power down sequence for us. */
+ snd_soc_update_bits(codec, STA32X_CONFF,
+ STA32X_CONFF_PWDN | STA32X_CONFF_EAPD,
+ STA32X_CONFF_PWDN);
+ msleep(300);
+
+ regulator_bulk_disable(ARRAY_SIZE(sta32x->supplies),
+ sta32x->supplies);
+ break;
+ }
+ codec->dapm.bias_level = level;
+ return 0;
+}
+
+static struct snd_soc_dai_ops sta32x_dai_ops = {
+ .hw_params = sta32x_hw_params,
+ .set_sysclk = sta32x_set_dai_sysclk,
+ .set_fmt = sta32x_set_dai_fmt,
+};
+
+static struct snd_soc_dai_driver sta32x_dai = {
+ .name = "STA32X",
+ .playback = {
+ .stream_name = "Playback",
+ .channels_min = 2,
+ .channels_max = 2,
+ .rates = STA32X_RATES,
+ .formats = STA32X_FORMATS,
+ },
+ .ops = &sta32x_dai_ops,
+};
+
+#ifdef CONFIG_PM
+static int sta32x_suspend(struct snd_soc_codec *codec, pm_message_t state)
+{
+ sta32x_set_bias_level(codec, SND_SOC_BIAS_OFF);
+ return 0;
+}
+
+static int sta32x_resume(struct snd_soc_codec *codec)
+{
+ sta32x_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
+ return 0;
+}
+#else
+#define sta32x_suspend NULL
+#define sta32x_resume NULL
+#endif
+
+static int sta32x_probe(struct snd_soc_codec *codec)
+{
+ struct sta32x_priv *sta32x = snd_soc_codec_get_drvdata(codec);
+ int i, ret = 0;
+
+ sta32x->codec = codec;
+
+ /* regulators */
+ for (i = 0; i < ARRAY_SIZE(sta32x->supplies); i++)
+ sta32x->supplies[i].supply = sta32x_supply_names[i];
+
+ ret = regulator_bulk_get(codec->dev, ARRAY_SIZE(sta32x->supplies),
+ sta32x->supplies);
+ if (ret != 0) {
+ dev_err(codec->dev, "Failed to request supplies: %d\n", ret);
+ goto err;
+ }
+
+ ret = regulator_bulk_enable(ARRAY_SIZE(sta32x->supplies),
+ sta32x->supplies);
+ if (ret != 0) {
+ dev_err(codec->dev, "Failed to enable supplies: %d\n", ret);
+ goto err_get;
+ }
+
+ /* Tell ASoC what kind of I/O to use to read the registers. ASoC will
+ * then do the I2C transactions itself.
+ */
+ ret = snd_soc_codec_set_cache_io(codec, 8, 8, SND_SOC_I2C);
+ if (ret < 0) {
+ dev_err(codec->dev, "failed to set cache I/O (ret=%i)\n", ret);
+ return ret;
+ }
+
+ /* read reg reset values into cache */
+ for (i = 0; i < STA32X_REGISTER_COUNT; i++)
+ snd_soc_cache_write(codec, i, sta32x_regs[i]);
+
+ /* preserve reset values of reserved register bits */
+ snd_soc_cache_write(codec, STA32X_CONFC,
+ codec->hw_read(codec, STA32X_CONFC));
+ snd_soc_cache_write(codec, STA32X_CONFE,
+ codec->hw_read(codec, STA32X_CONFE));
+ snd_soc_cache_write(codec, STA32X_CONFF,
+ codec->hw_read(codec, STA32X_CONFF));
+ snd_soc_cache_write(codec, STA32X_MMUTE,
+ codec->hw_read(codec, STA32X_MMUTE));
+ snd_soc_cache_write(codec, STA32X_AUTO1,
+ codec->hw_read(codec, STA32X_AUTO1));
+ snd_soc_cache_write(codec, STA32X_AUTO3,
+ codec->hw_read(codec, STA32X_AUTO3));
+ snd_soc_cache_write(codec, STA32X_C3CFG,
+ codec->hw_read(codec, STA32X_C3CFG));
+
+ /* FIXME enable thermal warning adjustment and recovery */
+ snd_soc_update_bits(codec, STA32X_CONFA,
+ STA32X_CONFA_TWAB | STA32X_CONFA_TWRB, 0);
+
+ /* FIXME select 2.1 mode */
+ snd_soc_update_bits(codec, STA32X_CONFF,
+ STA32X_CONFF_OCFG_MASK,
+ 1 << STA32X_CONFF_OCFG_SHIFT);
+
+ /* FIXME channel to output mapping */
+ snd_soc_update_bits(codec, STA32X_C1CFG,
+ STA32X_CxCFG_OM_MASK,
+ 0 << STA32X_CxCFG_OM_SHIFT);
+ snd_soc_update_bits(codec, STA32X_C2CFG,
+ STA32X_CxCFG_OM_MASK,
+ 1 << STA32X_CxCFG_OM_SHIFT);
+ snd_soc_update_bits(codec, STA32X_C3CFG,
+ STA32X_CxCFG_OM_MASK,
+ 2 << STA32X_CxCFG_OM_SHIFT);
+
+ sta32x_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
+ /* Bias level configuration will have done an extra enable */
+ regulator_bulk_disable(ARRAY_SIZE(sta32x->supplies), sta32x->supplies);
+
+ return 0;
+
+err_get:
+ regulator_bulk_free(ARRAY_SIZE(sta32x->supplies), sta32x->supplies);
+err:
+ return ret;
+}
+
+static int sta32x_remove(struct snd_soc_codec *codec)
+{
+ struct sta32x_priv *sta32x = snd_soc_codec_get_drvdata(codec);
+
+ regulator_bulk_disable(ARRAY_SIZE(sta32x->supplies), sta32x->supplies);
+ regulator_bulk_free(ARRAY_SIZE(sta32x->supplies), sta32x->supplies);
+
+ return 0;
+}
+
+static int sta32x_reg_is_volatile(struct snd_soc_codec *codec,
+ unsigned int reg)
+{
+ switch (reg) {
+ case STA32X_CONFA ... STA32X_L2ATRT:
+ case STA32X_MPCC1 ... STA32X_FDRC2:
+ return 0;
+ }
+ return 1;
+}
+
+static const struct snd_soc_codec_driver sta32x_codec = {
+ .probe = sta32x_probe,
+ .remove = sta32x_remove,
+ .suspend = sta32x_suspend,
+ .resume = sta32x_resume,
+ .reg_cache_size = STA32X_REGISTER_COUNT,
+ .reg_word_size = sizeof(u8),
+ .volatile_register = sta32x_reg_is_volatile,
+ .set_bias_level = sta32x_set_bias_level,
+ .controls = sta32x_snd_controls,
+ .num_controls = ARRAY_SIZE(sta32x_snd_controls),
+ .dapm_widgets = sta32x_dapm_widgets,
+ .num_dapm_widgets = ARRAY_SIZE(sta32x_dapm_widgets),
+ .dapm_routes = sta32x_dapm_routes,
+ .num_dapm_routes = ARRAY_SIZE(sta32x_dapm_routes),
+};
+
+static __devinit int sta32x_i2c_probe(struct i2c_client *i2c,
+ const struct i2c_device_id *id)
+{
+ struct sta32x_priv *sta32x;
+ int ret;
+
+ sta32x = kzalloc(sizeof(struct sta32x_priv), GFP_KERNEL);
+ if (!sta32x)
+ return -ENOMEM;
+
+ i2c_set_clientdata(i2c, sta32x);
+
+ ret = snd_soc_register_codec(&i2c->dev, &sta32x_codec, &sta32x_dai, 1);
+ if (ret != 0) {
+ dev_err(&i2c->dev, "Failed to register codec (%d)\n", ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+static __devexit int sta32x_i2c_remove(struct i2c_client *client)
+{
+ struct sta32x_priv *sta32x = i2c_get_clientdata(client);
+ struct snd_soc_codec *codec = sta32x->codec;
+
+ if (codec)
+ sta32x_set_bias_level(codec, SND_SOC_BIAS_OFF);
+
+ regulator_bulk_free(ARRAY_SIZE(sta32x->supplies), sta32x->supplies);
+
+ if (codec) {
+ snd_soc_unregister_codec(&client->dev);
+ snd_soc_codec_set_drvdata(codec, NULL);
+ }
+
+ kfree(sta32x);
+ return 0;
+}
+
+static const struct i2c_device_id sta32x_i2c_id[] = {
+ { "sta326", 0 },
+ { "sta328", 0 },
+ { "sta329", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, sta32x_i2c_id);
+
+static struct i2c_driver sta32x_i2c_driver = {
+ .driver = {
+ .name = "sta32x",
+ .owner = THIS_MODULE,
+ },
+ .probe = sta32x_i2c_probe,
+ .remove = __devexit_p(sta32x_i2c_remove),
+ .id_table = sta32x_i2c_id,
+};
+
+static int __init sta32x_init(void)
+{
+ return i2c_add_driver(&sta32x_i2c_driver);
+}
+module_init(sta32x_init);
+
+static void __exit sta32x_exit(void)
+{
+ i2c_del_driver(&sta32x_i2c_driver);
+}
+module_exit(sta32x_exit);
+
+MODULE_DESCRIPTION("ASoC STA32X driver");
+MODULE_AUTHOR("Johannes Stezenbach <js@sig21.net>");
+MODULE_LICENSE("GPL");
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