--- /dev/null
+/*
+ * SSM2518 amplifier audio driver
+ *
+ * Copyright 2013 Analog Devices Inc.
+ * Author: Lars-Peter Clausen <lars@metafoo.de>
+ *
+ * Licensed under the GPL-2.
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/i2c.h>
+#include <linux/regmap.h>
+#include <linux/slab.h>
+#include <linux/gpio.h>
+#include <linux/of_gpio.h>
+#include <linux/platform_data/ssm2518.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/initval.h>
+#include <sound/tlv.h>
+
+#include "ssm2518.h"
+
+#define SSM2518_REG_POWER1 0x00
+#define SSM2518_REG_CLOCK 0x01
+#define SSM2518_REG_SAI_CTRL1 0x02
+#define SSM2518_REG_SAI_CTRL2 0x03
+#define SSM2518_REG_CHAN_MAP 0x04
+#define SSM2518_REG_LEFT_VOL 0x05
+#define SSM2518_REG_RIGHT_VOL 0x06
+#define SSM2518_REG_MUTE_CTRL 0x07
+#define SSM2518_REG_FAULT_CTRL 0x08
+#define SSM2518_REG_POWER2 0x09
+#define SSM2518_REG_DRC_1 0x0a
+#define SSM2518_REG_DRC_2 0x0b
+#define SSM2518_REG_DRC_3 0x0c
+#define SSM2518_REG_DRC_4 0x0d
+#define SSM2518_REG_DRC_5 0x0e
+#define SSM2518_REG_DRC_6 0x0f
+#define SSM2518_REG_DRC_7 0x10
+#define SSM2518_REG_DRC_8 0x11
+#define SSM2518_REG_DRC_9 0x12
+
+#define SSM2518_POWER1_RESET BIT(7)
+#define SSM2518_POWER1_NO_BCLK BIT(5)
+#define SSM2518_POWER1_MCS_MASK (0xf << 1)
+#define SSM2518_POWER1_MCS_64FS (0x0 << 1)
+#define SSM2518_POWER1_MCS_128FS (0x1 << 1)
+#define SSM2518_POWER1_MCS_256FS (0x2 << 1)
+#define SSM2518_POWER1_MCS_384FS (0x3 << 1)
+#define SSM2518_POWER1_MCS_512FS (0x4 << 1)
+#define SSM2518_POWER1_MCS_768FS (0x5 << 1)
+#define SSM2518_POWER1_MCS_100FS (0x6 << 1)
+#define SSM2518_POWER1_MCS_200FS (0x7 << 1)
+#define SSM2518_POWER1_MCS_400FS (0x8 << 1)
+#define SSM2518_POWER1_SPWDN BIT(0)
+
+#define SSM2518_CLOCK_ASR BIT(0)
+
+#define SSM2518_SAI_CTRL1_FMT_MASK (0x3 << 5)
+#define SSM2518_SAI_CTRL1_FMT_I2S (0x0 << 5)
+#define SSM2518_SAI_CTRL1_FMT_LJ (0x1 << 5)
+#define SSM2518_SAI_CTRL1_FMT_RJ_24BIT (0x2 << 5)
+#define SSM2518_SAI_CTRL1_FMT_RJ_16BIT (0x3 << 5)
+
+#define SSM2518_SAI_CTRL1_SAI_MASK (0x7 << 2)
+#define SSM2518_SAI_CTRL1_SAI_I2S (0x0 << 2)
+#define SSM2518_SAI_CTRL1_SAI_TDM_2 (0x1 << 2)
+#define SSM2518_SAI_CTRL1_SAI_TDM_4 (0x2 << 2)
+#define SSM2518_SAI_CTRL1_SAI_TDM_8 (0x3 << 2)
+#define SSM2518_SAI_CTRL1_SAI_TDM_16 (0x4 << 2)
+#define SSM2518_SAI_CTRL1_SAI_MONO (0x5 << 2)
+
+#define SSM2518_SAI_CTRL1_FS_MASK (0x3)
+#define SSM2518_SAI_CTRL1_FS_8000_12000 (0x0)
+#define SSM2518_SAI_CTRL1_FS_16000_24000 (0x1)
+#define SSM2518_SAI_CTRL1_FS_32000_48000 (0x2)
+#define SSM2518_SAI_CTRL1_FS_64000_96000 (0x3)
+
+#define SSM2518_SAI_CTRL2_BCLK_INTERAL BIT(7)
+#define SSM2518_SAI_CTRL2_LRCLK_PULSE BIT(6)
+#define SSM2518_SAI_CTRL2_LRCLK_INVERT BIT(5)
+#define SSM2518_SAI_CTRL2_MSB BIT(4)
+#define SSM2518_SAI_CTRL2_SLOT_WIDTH_MASK (0x3 << 2)
+#define SSM2518_SAI_CTRL2_SLOT_WIDTH_32 (0x0 << 2)
+#define SSM2518_SAI_CTRL2_SLOT_WIDTH_24 (0x1 << 2)
+#define SSM2518_SAI_CTRL2_SLOT_WIDTH_16 (0x2 << 2)
+#define SSM2518_SAI_CTRL2_BCLK_INVERT BIT(1)
+
+#define SSM2518_CHAN_MAP_RIGHT_SLOT_OFFSET 4
+#define SSM2518_CHAN_MAP_RIGHT_SLOT_MASK 0xf0
+#define SSM2518_CHAN_MAP_LEFT_SLOT_OFFSET 0
+#define SSM2518_CHAN_MAP_LEFT_SLOT_MASK 0x0f
+
+#define SSM2518_MUTE_CTRL_ANA_GAIN BIT(5)
+#define SSM2518_MUTE_CTRL_MUTE_MASTER BIT(0)
+
+#define SSM2518_POWER2_APWDN BIT(0)
+
+#define SSM2518_DAC_MUTE BIT(6)
+#define SSM2518_DAC_FS_MASK 0x07
+#define SSM2518_DAC_FS_8000 0x00
+#define SSM2518_DAC_FS_16000 0x01
+#define SSM2518_DAC_FS_32000 0x02
+#define SSM2518_DAC_FS_64000 0x03
+#define SSM2518_DAC_FS_128000 0x04
+
+struct ssm2518 {
+ struct regmap *regmap;
+ bool right_j;
+
+ unsigned int sysclk;
+ const struct snd_pcm_hw_constraint_list *constraints;
+
+ int enable_gpio;
+};
+
+static const struct reg_default ssm2518_reg_defaults[] = {
+ { 0x00, 0x05 },
+ { 0x01, 0x00 },
+ { 0x02, 0x02 },
+ { 0x03, 0x00 },
+ { 0x04, 0x10 },
+ { 0x05, 0x40 },
+ { 0x06, 0x40 },
+ { 0x07, 0x81 },
+ { 0x08, 0x0c },
+ { 0x09, 0x99 },
+ { 0x0a, 0x7c },
+ { 0x0b, 0x5b },
+ { 0x0c, 0x57 },
+ { 0x0d, 0x89 },
+ { 0x0e, 0x8c },
+ { 0x0f, 0x77 },
+ { 0x10, 0x26 },
+ { 0x11, 0x1c },
+ { 0x12, 0x97 },
+};
+
+static const DECLARE_TLV_DB_MINMAX_MUTE(ssm2518_vol_tlv, -7125, 2400);
+static const DECLARE_TLV_DB_SCALE(ssm2518_compressor_tlv, -3400, 200, 0);
+static const DECLARE_TLV_DB_SCALE(ssm2518_expander_tlv, -8100, 300, 0);
+static const DECLARE_TLV_DB_SCALE(ssm2518_noise_gate_tlv, -9600, 300, 0);
+static const DECLARE_TLV_DB_SCALE(ssm2518_post_drc_tlv, -2400, 300, 0);
+
+static const DECLARE_TLV_DB_RANGE(ssm2518_limiter_tlv,
+ 0, 7, TLV_DB_SCALE_ITEM(-2200, 200, 0),
+ 7, 15, TLV_DB_SCALE_ITEM(-800, 100, 0),
+);
+
+static const char * const ssm2518_drc_peak_detector_attack_time_text[] = {
+ "0 ms", "0.1 ms", "0.19 ms", "0.37 ms", "0.75 ms", "1.5 ms", "3 ms",
+ "6 ms", "12 ms", "24 ms", "48 ms", "96 ms", "192 ms", "384 ms",
+ "768 ms", "1536 ms",
+};
+
+static const char * const ssm2518_drc_peak_detector_release_time_text[] = {
+ "0 ms", "1.5 ms", "3 ms", "6 ms", "12 ms", "24 ms", "48 ms", "96 ms",
+ "192 ms", "384 ms", "768 ms", "1536 ms", "3072 ms", "6144 ms",
+ "12288 ms", "24576 ms"
+};
+
+static const char * const ssm2518_drc_hold_time_text[] = {
+ "0 ms", "0.67 ms", "1.33 ms", "2.67 ms", "5.33 ms", "10.66 ms",
+ "21.32 ms", "42.64 ms", "85.28 ms", "170.56 ms", "341.12 ms",
+ "682.24 ms", "1364 ms",
+};
+
+static const SOC_ENUM_SINGLE_DECL(ssm2518_drc_peak_detector_attack_time_enum,
+ SSM2518_REG_DRC_2, 4, ssm2518_drc_peak_detector_attack_time_text);
+static const SOC_ENUM_SINGLE_DECL(ssm2518_drc_peak_detector_release_time_enum,
+ SSM2518_REG_DRC_2, 0, ssm2518_drc_peak_detector_release_time_text);
+static const SOC_ENUM_SINGLE_DECL(ssm2518_drc_attack_time_enum,
+ SSM2518_REG_DRC_6, 4, ssm2518_drc_peak_detector_attack_time_text);
+static const SOC_ENUM_SINGLE_DECL(ssm2518_drc_decay_time_enum,
+ SSM2518_REG_DRC_6, 0, ssm2518_drc_peak_detector_release_time_text);
+static const SOC_ENUM_SINGLE_DECL(ssm2518_drc_hold_time_enum,
+ SSM2518_REG_DRC_7, 4, ssm2518_drc_hold_time_text);
+static const SOC_ENUM_SINGLE_DECL(ssm2518_drc_noise_gate_hold_time_enum,
+ SSM2518_REG_DRC_7, 0, ssm2518_drc_hold_time_text);
+static const SOC_ENUM_SINGLE_DECL(ssm2518_drc_rms_averaging_time_enum,
+ SSM2518_REG_DRC_9, 0, ssm2518_drc_peak_detector_release_time_text);
+
+static const struct snd_kcontrol_new ssm2518_snd_controls[] = {
+ SOC_SINGLE("Playback De-emphasis Switch", SSM2518_REG_MUTE_CTRL,
+ 4, 1, 0),
+ SOC_DOUBLE_R_TLV("Master Playback Volume", SSM2518_REG_LEFT_VOL,
+ SSM2518_REG_RIGHT_VOL, 0, 0xff, 1, ssm2518_vol_tlv),
+ SOC_DOUBLE("Master Playback Switch", SSM2518_REG_MUTE_CTRL, 2, 1, 1, 1),
+
+ SOC_SINGLE("Amp Low Power Mode Switch", SSM2518_REG_POWER2, 4, 1, 0),
+ SOC_SINGLE("DAC Low Power Mode Switch", SSM2518_REG_POWER2, 3, 1, 0),
+
+ SOC_SINGLE("DRC Limiter Switch", SSM2518_REG_DRC_1, 5, 1, 0),
+ SOC_SINGLE("DRC Compressor Switch", SSM2518_REG_DRC_1, 4, 1, 0),
+ SOC_SINGLE("DRC Expander Switch", SSM2518_REG_DRC_1, 3, 1, 0),
+ SOC_SINGLE("DRC Noise Gate Switch", SSM2518_REG_DRC_1, 2, 1, 0),
+ SOC_DOUBLE("DRC Switch", SSM2518_REG_DRC_1, 0, 1, 1, 0),
+
+ SOC_SINGLE_TLV("DRC Limiter Threshold Volume",
+ SSM2518_REG_DRC_3, 4, 15, 1, ssm2518_limiter_tlv),
+ SOC_SINGLE_TLV("DRC Compressor Lower Threshold Volume",
+ SSM2518_REG_DRC_3, 0, 15, 1, ssm2518_compressor_tlv),
+ SOC_SINGLE_TLV("DRC Expander Upper Threshold Volume", SSM2518_REG_DRC_4,
+ 4, 15, 1, ssm2518_expander_tlv),
+ SOC_SINGLE_TLV("DRC Noise Gate Threshold Volume",
+ SSM2518_REG_DRC_4, 0, 15, 1, ssm2518_noise_gate_tlv),
+ SOC_SINGLE_TLV("DRC Upper Output Threshold Volume",
+ SSM2518_REG_DRC_5, 4, 15, 1, ssm2518_limiter_tlv),
+ SOC_SINGLE_TLV("DRC Lower Output Threshold Volume",
+ SSM2518_REG_DRC_5, 0, 15, 1, ssm2518_noise_gate_tlv),
+ SOC_SINGLE_TLV("DRC Post Volume", SSM2518_REG_DRC_8,
+ 2, 15, 1, ssm2518_post_drc_tlv),
+
+ SOC_ENUM("DRC Peak Detector Attack Time",
+ ssm2518_drc_peak_detector_attack_time_enum),
+ SOC_ENUM("DRC Peak Detector Release Time",
+ ssm2518_drc_peak_detector_release_time_enum),
+ SOC_ENUM("DRC Attack Time", ssm2518_drc_attack_time_enum),
+ SOC_ENUM("DRC Decay Time", ssm2518_drc_decay_time_enum),
+ SOC_ENUM("DRC Hold Time", ssm2518_drc_hold_time_enum),
+ SOC_ENUM("DRC Noise Gate Hold Time",
+ ssm2518_drc_noise_gate_hold_time_enum),
+ SOC_ENUM("DRC RMS Averaging Time", ssm2518_drc_rms_averaging_time_enum),
+};
+
+static const struct snd_soc_dapm_widget ssm2518_dapm_widgets[] = {
+ SND_SOC_DAPM_DAC("DACL", "HiFi Playback", SSM2518_REG_POWER2, 1, 1),
+ SND_SOC_DAPM_DAC("DACR", "HiFi Playback", SSM2518_REG_POWER2, 2, 1),
+
+ SND_SOC_DAPM_OUTPUT("OUTL"),
+ SND_SOC_DAPM_OUTPUT("OUTR"),
+};
+
+static const struct snd_soc_dapm_route ssm2518_routes[] = {
+ { "OUTL", NULL, "DACL" },
+ { "OUTR", NULL, "DACR" },
+};
+
+struct ssm2518_mcs_lut {
+ unsigned int rate;
+ const unsigned int *sysclks;
+};
+
+static const unsigned int ssm2518_sysclks_2048000[] = {
+ 2048000, 4096000, 8192000, 12288000, 16384000, 24576000,
+ 3200000, 6400000, 12800000, 0
+};
+
+static const unsigned int ssm2518_sysclks_2822000[] = {
+ 2822000, 5644800, 11289600, 16934400, 22579200, 33868800,
+ 4410000, 8820000, 17640000, 0
+};
+
+static const unsigned int ssm2518_sysclks_3072000[] = {
+ 3072000, 6144000, 12288000, 16384000, 24576000, 38864000,
+ 4800000, 9600000, 19200000, 0
+};
+
+static const struct ssm2518_mcs_lut ssm2518_mcs_lut[] = {
+ { 8000, ssm2518_sysclks_2048000, },
+ { 11025, ssm2518_sysclks_2822000, },
+ { 12000, ssm2518_sysclks_3072000, },
+ { 16000, ssm2518_sysclks_2048000, },
+ { 24000, ssm2518_sysclks_3072000, },
+ { 22050, ssm2518_sysclks_2822000, },
+ { 32000, ssm2518_sysclks_2048000, },
+ { 44100, ssm2518_sysclks_2822000, },
+ { 48000, ssm2518_sysclks_3072000, },
+ { 96000, ssm2518_sysclks_3072000, },
+};
+
+static const unsigned int ssm2518_rates_2048000[] = {
+ 8000, 16000, 32000,
+};
+
+static const struct snd_pcm_hw_constraint_list ssm2518_constraints_2048000 = {
+ .list = ssm2518_rates_2048000,
+ .count = ARRAY_SIZE(ssm2518_rates_2048000),
+};
+
+static const unsigned int ssm2518_rates_2822000[] = {
+ 11025, 22050, 44100,
+};
+
+static const struct snd_pcm_hw_constraint_list ssm2518_constraints_2822000 = {
+ .list = ssm2518_rates_2822000,
+ .count = ARRAY_SIZE(ssm2518_rates_2822000),
+};
+
+static const unsigned int ssm2518_rates_3072000[] = {
+ 12000, 24000, 48000, 96000,
+};
+
+static const struct snd_pcm_hw_constraint_list ssm2518_constraints_3072000 = {
+ .list = ssm2518_rates_3072000,
+ .count = ARRAY_SIZE(ssm2518_rates_3072000),
+};
+
+static const unsigned int ssm2518_rates_12288000[] = {
+ 8000, 12000, 16000, 24000, 32000, 48000, 96000,
+};
+
+static const struct snd_pcm_hw_constraint_list ssm2518_constraints_12288000 = {
+ .list = ssm2518_rates_12288000,
+ .count = ARRAY_SIZE(ssm2518_rates_12288000),
+};
+
+static unsigned int ssm2518_lookup_mcs(struct ssm2518 *ssm2518,
+ unsigned int rate)
+{
+ const unsigned int *sysclks = NULL;
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(ssm2518_mcs_lut); i++) {
+ if (ssm2518_mcs_lut[i].rate == rate) {
+ sysclks = ssm2518_mcs_lut[i].sysclks;
+ break;
+ }
+ }
+
+ if (!sysclks)
+ return -EINVAL;
+
+ for (i = 0; sysclks[i]; i++) {
+ if (sysclks[i] == ssm2518->sysclk)
+ return i;
+ }
+
+ return -EINVAL;
+}
+
+static int ssm2518_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params, struct snd_soc_dai *dai)
+{
+ struct snd_soc_codec *codec = dai->codec;
+ struct ssm2518 *ssm2518 = snd_soc_codec_get_drvdata(codec);
+ unsigned int rate = params_rate(params);
+ unsigned int ctrl1, ctrl1_mask;
+ int mcs;
+ int ret;
+
+ mcs = ssm2518_lookup_mcs(ssm2518, rate);
+ if (mcs < 0)
+ return mcs;
+
+ ctrl1_mask = SSM2518_SAI_CTRL1_FS_MASK;
+
+ if (rate >= 8000 && rate <= 12000)
+ ctrl1 = SSM2518_SAI_CTRL1_FS_8000_12000;
+ else if (rate >= 16000 && rate <= 24000)
+ ctrl1 = SSM2518_SAI_CTRL1_FS_16000_24000;
+ else if (rate >= 32000 && rate <= 48000)
+ ctrl1 = SSM2518_SAI_CTRL1_FS_32000_48000;
+ else if (rate >= 64000 && rate <= 96000)
+ ctrl1 = SSM2518_SAI_CTRL1_FS_64000_96000;
+ else
+ return -EINVAL;
+
+ if (ssm2518->right_j) {
+ switch (params_format(params)) {
+ case SNDRV_PCM_FORMAT_S16_LE:
+ ctrl1 |= SSM2518_SAI_CTRL1_FMT_RJ_16BIT;
+ break;
+ case SNDRV_PCM_FORMAT_S24_LE:
+ ctrl1 |= SSM2518_SAI_CTRL1_FMT_RJ_24BIT;
+ break;
+ default:
+ return -EINVAL;
+ }
+ ctrl1_mask |= SSM2518_SAI_CTRL1_FMT_MASK;
+ }
+
+ /* Disable auto samplerate detection */
+ ret = regmap_update_bits(ssm2518->regmap, SSM2518_REG_CLOCK,
+ SSM2518_CLOCK_ASR, SSM2518_CLOCK_ASR);
+ if (ret < 0)
+ return ret;
+
+ ret = regmap_update_bits(ssm2518->regmap, SSM2518_REG_SAI_CTRL1,
+ ctrl1_mask, ctrl1);
+ if (ret < 0)
+ return ret;
+
+ return regmap_update_bits(ssm2518->regmap, SSM2518_REG_POWER1,
+ SSM2518_POWER1_MCS_MASK, mcs << 1);
+}
+
+static int ssm2518_mute(struct snd_soc_dai *dai, int mute)
+{
+ struct ssm2518 *ssm2518 = snd_soc_codec_get_drvdata(dai->codec);
+ unsigned int val;
+
+ if (mute)
+ val = SSM2518_MUTE_CTRL_MUTE_MASTER;
+ else
+ val = 0;
+
+ return regmap_update_bits(ssm2518->regmap, SSM2518_REG_MUTE_CTRL,
+ SSM2518_MUTE_CTRL_MUTE_MASTER, val);
+}
+
+static int ssm2518_set_dai_fmt(struct snd_soc_dai *dai, unsigned int fmt)
+{
+ struct ssm2518 *ssm2518 = snd_soc_codec_get_drvdata(dai->codec);
+ unsigned int ctrl1 = 0, ctrl2 = 0;
+ bool invert_fclk;
+ int ret;
+
+ switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
+ case SND_SOC_DAIFMT_CBS_CFS:
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
+ case SND_SOC_DAIFMT_NB_NF:
+ invert_fclk = false;
+ break;
+ case SND_SOC_DAIFMT_IB_NF:
+ ctrl2 |= SSM2518_SAI_CTRL2_BCLK_INVERT;
+ invert_fclk = false;
+ break;
+ case SND_SOC_DAIFMT_NB_IF:
+ invert_fclk = true;
+ break;
+ case SND_SOC_DAIFMT_IB_IF:
+ ctrl2 |= SSM2518_SAI_CTRL2_BCLK_INVERT;
+ invert_fclk = true;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ ssm2518->right_j = false;
+ switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
+ case SND_SOC_DAIFMT_I2S:
+ ctrl1 |= SSM2518_SAI_CTRL1_FMT_I2S;
+ break;
+ case SND_SOC_DAIFMT_LEFT_J:
+ ctrl1 |= SSM2518_SAI_CTRL1_FMT_LJ;
+ invert_fclk = !invert_fclk;
+ break;
+ case SND_SOC_DAIFMT_RIGHT_J:
+ ctrl1 |= SSM2518_SAI_CTRL1_FMT_RJ_24BIT;
+ ssm2518->right_j = true;
+ invert_fclk = !invert_fclk;
+ break;
+ case SND_SOC_DAIFMT_DSP_A:
+ ctrl2 |= SSM2518_SAI_CTRL2_LRCLK_PULSE;
+ ctrl1 |= SSM2518_SAI_CTRL1_FMT_I2S;
+ invert_fclk = false;
+ break;
+ case SND_SOC_DAIFMT_DSP_B:
+ ctrl2 |= SSM2518_SAI_CTRL2_LRCLK_PULSE;
+ ctrl1 |= SSM2518_SAI_CTRL1_FMT_LJ;
+ invert_fclk = false;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ if (invert_fclk)
+ ctrl2 |= SSM2518_SAI_CTRL2_LRCLK_INVERT;
+
+ ret = regmap_write(ssm2518->regmap, SSM2518_REG_SAI_CTRL1, ctrl1);
+ if (ret)
+ return ret;
+
+ return regmap_write(ssm2518->regmap, SSM2518_REG_SAI_CTRL2, ctrl2);
+}
+
+static int ssm2518_set_power(struct ssm2518 *ssm2518, bool enable)
+{
+ int ret = 0;
+
+ if (!enable) {
+ ret = regmap_update_bits(ssm2518->regmap, SSM2518_REG_POWER1,
+ SSM2518_POWER1_SPWDN, SSM2518_POWER1_SPWDN);
+ regcache_mark_dirty(ssm2518->regmap);
+ }
+
+ if (gpio_is_valid(ssm2518->enable_gpio))
+ gpio_set_value(ssm2518->enable_gpio, enable);
+
+ regcache_cache_only(ssm2518->regmap, !enable);
+
+ if (enable) {
+ ret = regmap_update_bits(ssm2518->regmap, SSM2518_REG_POWER1,
+ SSM2518_POWER1_SPWDN | SSM2518_POWER1_RESET, 0x00);
+ regcache_sync(ssm2518->regmap);
+ }
+
+ return ret;
+}
+
+static int ssm2518_set_bias_level(struct snd_soc_codec *codec,
+ enum snd_soc_bias_level level)
+{
+ struct ssm2518 *ssm2518 = snd_soc_codec_get_drvdata(codec);
+ int ret = 0;
+
+ switch (level) {
+ case SND_SOC_BIAS_ON:
+ break;
+ case SND_SOC_BIAS_PREPARE:
+ break;
+ case SND_SOC_BIAS_STANDBY:
+ if (codec->dapm.bias_level == SND_SOC_BIAS_OFF)
+ ret = ssm2518_set_power(ssm2518, true);
+ break;
+ case SND_SOC_BIAS_OFF:
+ ret = ssm2518_set_power(ssm2518, false);
+ break;
+ }
+
+ if (ret)
+ return ret;
+
+ codec->dapm.bias_level = level;
+
+ return 0;
+}
+
+static int ssm2518_set_tdm_slot(struct snd_soc_dai *dai, unsigned int tx_mask,
+ unsigned int rx_mask, int slots, int width)
+{
+ struct ssm2518 *ssm2518 = snd_soc_codec_get_drvdata(dai->codec);
+ unsigned int ctrl1, ctrl2;
+ int left_slot, right_slot;
+ int ret;
+
+ if (slots == 0)
+ return regmap_update_bits(ssm2518->regmap,
+ SSM2518_REG_SAI_CTRL1, SSM2518_SAI_CTRL1_SAI_MASK,
+ SSM2518_SAI_CTRL1_SAI_I2S);
+
+ if (tx_mask == 0 || tx_mask != 0)
+ return -EINVAL;
+
+ if (slots == 1) {
+ if (tx_mask != 1)
+ return -EINVAL;
+ left_slot = 0;
+ right_slot = 0;
+ } else {
+ /* We assume the left channel < right channel */
+ left_slot = ffs(tx_mask);
+ tx_mask &= ~(1 << tx_mask);
+ if (tx_mask == 0) {
+ right_slot = left_slot;
+ } else {
+ right_slot = ffs(tx_mask);
+ tx_mask &= ~(1 << tx_mask);
+ }
+ }
+
+ if (tx_mask != 0 || left_slot >= slots || right_slot >= slots)
+ return -EINVAL;
+
+ switch (width) {
+ case 16:
+ ctrl2 = SSM2518_SAI_CTRL2_SLOT_WIDTH_16;
+ break;
+ case 24:
+ ctrl2 = SSM2518_SAI_CTRL2_SLOT_WIDTH_24;
+ break;
+ case 32:
+ ctrl2 = SSM2518_SAI_CTRL2_SLOT_WIDTH_32;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ switch (slots) {
+ case 1:
+ ctrl1 = SSM2518_SAI_CTRL1_SAI_MONO;
+ break;
+ case 2:
+ ctrl1 = SSM2518_SAI_CTRL1_SAI_TDM_2;
+ break;
+ case 4:
+ ctrl1 = SSM2518_SAI_CTRL1_SAI_TDM_4;
+ break;
+ case 8:
+ ctrl1 = SSM2518_SAI_CTRL1_SAI_TDM_8;
+ break;
+ case 16:
+ ctrl1 = SSM2518_SAI_CTRL1_SAI_TDM_16;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ ret = regmap_write(ssm2518->regmap, SSM2518_REG_CHAN_MAP,
+ (left_slot << SSM2518_CHAN_MAP_LEFT_SLOT_OFFSET) |
+ (right_slot << SSM2518_CHAN_MAP_RIGHT_SLOT_OFFSET));
+ if (ret)
+ return ret;
+
+ ret = regmap_update_bits(ssm2518->regmap, SSM2518_REG_SAI_CTRL1,
+ SSM2518_SAI_CTRL1_SAI_MASK, ctrl1);
+ if (ret)
+ return ret;
+
+ return regmap_update_bits(ssm2518->regmap, SSM2518_REG_SAI_CTRL2,
+ SSM2518_SAI_CTRL2_SLOT_WIDTH_MASK, ctrl2);
+}
+
+static int ssm2518_startup(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct ssm2518 *ssm2518 = snd_soc_codec_get_drvdata(dai->codec);
+
+ if (ssm2518->constraints)
+ snd_pcm_hw_constraint_list(substream->runtime, 0,
+ SNDRV_PCM_HW_PARAM_RATE, ssm2518->constraints);
+
+ return 0;
+}
+
+#define SSM2518_FORMATS (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE | \
+ SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32)
+
+static const struct snd_soc_dai_ops ssm2518_dai_ops = {
+ .startup = ssm2518_startup,
+ .hw_params = ssm2518_hw_params,
+ .digital_mute = ssm2518_mute,
+ .set_fmt = ssm2518_set_dai_fmt,
+ .set_tdm_slot = ssm2518_set_tdm_slot,
+};
+
+static struct snd_soc_dai_driver ssm2518_dai = {
+ .name = "ssm2518-hifi",
+ .playback = {
+ .stream_name = "Playback",
+ .channels_min = 2,
+ .channels_max = 2,
+ .rates = SNDRV_PCM_RATE_8000_96000,
+ .formats = SSM2518_FORMATS,
+ },
+ .ops = &ssm2518_dai_ops,
+};
+
+static int ssm2518_probe(struct snd_soc_codec *codec)
+{
+ struct ssm2518 *ssm2518 = snd_soc_codec_get_drvdata(codec);
+ int ret;
+
+ codec->control_data = ssm2518->regmap;
+ ret = snd_soc_codec_set_cache_io(codec, 0, 0, SND_SOC_REGMAP);
+ if (ret < 0) {
+ dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
+ return ret;
+ }
+
+ return ssm2518_set_bias_level(codec, SND_SOC_BIAS_OFF);
+}
+
+static int ssm2518_remove(struct snd_soc_codec *codec)
+{
+ ssm2518_set_bias_level(codec, SND_SOC_BIAS_OFF);
+ return 0;
+}
+
+static int ssm2518_set_sysclk(struct snd_soc_codec *codec, int clk_id,
+ int source, unsigned int freq, int dir)
+{
+ struct ssm2518 *ssm2518 = snd_soc_codec_get_drvdata(codec);
+ unsigned int val;
+
+ if (clk_id != SSM2518_SYSCLK)
+ return -EINVAL;
+
+ switch (source) {
+ case SSM2518_SYSCLK_SRC_MCLK:
+ val = 0;
+ break;
+ case SSM2518_SYSCLK_SRC_BCLK:
+ /* In this case the bitclock is used as the system clock, and
+ * the bitclock signal needs to be connected to the MCLK pin and
+ * the BCLK pin is left unconnected */
+ val = SSM2518_POWER1_NO_BCLK;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ switch (freq) {
+ case 0:
+ ssm2518->constraints = NULL;
+ break;
+ case 2048000:
+ case 4096000:
+ case 8192000:
+ case 3200000:
+ case 6400000:
+ case 12800000:
+ ssm2518->constraints = &ssm2518_constraints_2048000;
+ break;
+ case 2822000:
+ case 5644800:
+ case 11289600:
+ case 16934400:
+ case 22579200:
+ case 33868800:
+ case 4410000:
+ case 8820000:
+ case 17640000:
+ ssm2518->constraints = &ssm2518_constraints_2822000;
+ break;
+ case 3072000:
+ case 6144000:
+ case 38864000:
+ case 4800000:
+ case 9600000:
+ case 19200000:
+ ssm2518->constraints = &ssm2518_constraints_3072000;
+ break;
+ case 12288000:
+ case 16384000:
+ case 24576000:
+ ssm2518->constraints = &ssm2518_constraints_12288000;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ ssm2518->sysclk = freq;
+
+ return regmap_update_bits(ssm2518->regmap, SSM2518_REG_POWER1,
+ SSM2518_POWER1_NO_BCLK, val);
+}
+
+static struct snd_soc_codec_driver ssm2518_codec_driver = {
+ .probe = ssm2518_probe,
+ .remove = ssm2518_remove,
+ .set_bias_level = ssm2518_set_bias_level,
+ .set_sysclk = ssm2518_set_sysclk,
+ .idle_bias_off = true,
+
+ .controls = ssm2518_snd_controls,
+ .num_controls = ARRAY_SIZE(ssm2518_snd_controls),
+ .dapm_widgets = ssm2518_dapm_widgets,
+ .num_dapm_widgets = ARRAY_SIZE(ssm2518_dapm_widgets),
+ .dapm_routes = ssm2518_routes,
+ .num_dapm_routes = ARRAY_SIZE(ssm2518_routes),
+};
+
+static bool ssm2518_register_volatile(struct device *dev, unsigned int reg)
+{
+ return false;
+}
+
+static const struct regmap_config ssm2518_regmap_config = {
+ .val_bits = 8,
+ .reg_bits = 8,
+
+ .max_register = SSM2518_REG_DRC_9,
+ .volatile_reg = ssm2518_register_volatile,
+
+ .cache_type = REGCACHE_RBTREE,
+ .reg_defaults = ssm2518_reg_defaults,
+ .num_reg_defaults = ARRAY_SIZE(ssm2518_reg_defaults),
+};
+
+static int ssm2518_i2c_probe(struct i2c_client *i2c,
+ const struct i2c_device_id *id)
+{
+ struct ssm2518_platform_data *pdata = i2c->dev.platform_data;
+ struct ssm2518 *ssm2518;
+ int ret;
+
+ ssm2518 = devm_kzalloc(&i2c->dev, sizeof(*ssm2518), GFP_KERNEL);
+ if (ssm2518 == NULL)
+ return -ENOMEM;
+
+ if (pdata) {
+ ssm2518->enable_gpio = pdata->enable_gpio;
+ } else if (i2c->dev.of_node) {
+ ssm2518->enable_gpio = of_get_gpio(i2c->dev.of_node, 0);
+ if (ssm2518->enable_gpio < 0 && ssm2518->enable_gpio != -ENOENT)
+ return ssm2518->enable_gpio;
+ } else {
+ ssm2518->enable_gpio = -1;
+ }
+
+ if (gpio_is_valid(ssm2518->enable_gpio)) {
+ ret = devm_gpio_request_one(&i2c->dev, ssm2518->enable_gpio,
+ GPIOF_OUT_INIT_HIGH, "SSM2518 nSD");
+ if (ret)
+ return ret;
+ }
+
+ i2c_set_clientdata(i2c, ssm2518);
+
+ ssm2518->regmap = devm_regmap_init_i2c(i2c, &ssm2518_regmap_config);
+ if (IS_ERR(ssm2518->regmap))
+ return PTR_ERR(ssm2518->regmap);
+
+ /*
+ * The reset bit is obviously volatile, but we need to be able to cache
+ * the other bits in the register, so we can't just mark the whole
+ * register as volatile. Since this is the only place where we'll ever
+ * touch the reset bit just bypass the cache for this operation.
+ */
+ regcache_cache_bypass(ssm2518->regmap, true);
+ ret = regmap_write(ssm2518->regmap, SSM2518_REG_POWER1,
+ SSM2518_POWER1_RESET);
+ regcache_cache_bypass(ssm2518->regmap, false);
+ if (ret)
+ return ret;
+
+ ret = regmap_update_bits(ssm2518->regmap, SSM2518_REG_POWER2,
+ SSM2518_POWER2_APWDN, 0x00);
+ if (ret)
+ return ret;
+
+ ret = ssm2518_set_power(ssm2518, false);
+ if (ret)
+ return ret;
+
+ return snd_soc_register_codec(&i2c->dev, &ssm2518_codec_driver,
+ &ssm2518_dai, 1);
+}
+
+static int ssm2518_i2c_remove(struct i2c_client *client)
+{
+ snd_soc_unregister_codec(&client->dev);
+ return 0;
+}
+
+static const struct i2c_device_id ssm2518_i2c_ids[] = {
+ { "ssm2518", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, ssm2518_i2c_ids);
+
+static struct i2c_driver ssm2518_driver = {
+ .driver = {
+ .name = "ssm2518",
+ .owner = THIS_MODULE,
+ },
+ .probe = ssm2518_i2c_probe,
+ .remove = ssm2518_i2c_remove,
+ .id_table = ssm2518_i2c_ids,
+};
+module_i2c_driver(ssm2518_driver);
+
+MODULE_DESCRIPTION("ASoC SSM2518 driver");
+MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
+MODULE_LICENSE("GPL");
projects / karo-tx-linux.git / commitdiff