--- /dev/null
+/*
+ * Driver for the ALLO KATANA CODEC
+ *
+ * Author: Jaikumar <jaikumar@cem-solutions.net>
+ * Copyright 2018
+ *
+ * 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.
+ */
+
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/clk.h>
+#include <linux/kernel.h>
+#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
+#include <linux/gcd.h>
+#include <sound/soc.h>
+#include <sound/soc-dapm.h>
+#include <sound/pcm_params.h>
+#include <sound/tlv.h>
+#include <linux/i2c.h>
+
+
+#define KATANA_CODEC_CHIP_ID 0x30
+#define KATANA_CODEC_VIRT_BASE 0x100
+#define KATANA_CODEC_PAGE 0
+
+#define KATANA_CODEC_CHIP_ID_REG (KATANA_CODEC_VIRT_BASE + 0)
+#define KATANA_CODEC_RESET (KATANA_CODEC_VIRT_BASE + 1)
+#define KATANA_CODEC_VOLUME_1 (KATANA_CODEC_VIRT_BASE + 2)
+#define KATANA_CODEC_VOLUME_2 (KATANA_CODEC_VIRT_BASE + 3)
+#define KATANA_CODEC_MUTE (KATANA_CODEC_VIRT_BASE + 4)
+#define KATANA_CODEC_DSP_PROGRAM (KATANA_CODEC_VIRT_BASE + 5)
+#define KATANA_CODEC_DEEMPHASIS (KATANA_CODEC_VIRT_BASE + 6)
+#define KATANA_CODEC_DOP (KATANA_CODEC_VIRT_BASE + 7)
+#define KATANA_CODEC_FORMAT (KATANA_CODEC_VIRT_BASE + 8)
+#define KATANA_CODEC_COMMAND (KATANA_CODEC_VIRT_BASE + 9)
+#define KATANA_CODEC_MAX_REGISTER (KATANA_CODEC_VIRT_BASE + 9)
+
+#define KATANA_CODEC_FMT 0xff
+#define KATANA_CODEC_CHAN_MONO 0x00
+#define KATANA_CODEC_CHAN_STEREO 0x80
+#define KATANA_CODEC_ALEN_16 0x10
+#define KATANA_CODEC_ALEN_24 0x20
+#define KATANA_CODEC_ALEN_32 0x30
+#define KATANA_CODEC_RATE_11025 0x01
+#define KATANA_CODEC_RATE_22050 0x02
+#define KATANA_CODEC_RATE_32000 0x03
+#define KATANA_CODEC_RATE_44100 0x04
+#define KATANA_CODEC_RATE_48000 0x05
+#define KATANA_CODEC_RATE_88200 0x06
+#define KATANA_CODEC_RATE_96000 0x07
+#define KATANA_CODEC_RATE_176400 0x08
+#define KATANA_CODEC_RATE_192000 0x09
+#define KATANA_CODEC_RATE_352800 0x0a
+#define KATANA_CODEC_RATE_384000 0x0b
+
+
+struct katana_codec_priv {
+ struct regmap *regmap;
+ int fmt;
+};
+
+static const struct reg_default katana_codec_reg_defaults[] = {
+ { KATANA_CODEC_RESET, 0x00 },
+ { KATANA_CODEC_VOLUME_1, 0xF0 },
+ { KATANA_CODEC_VOLUME_2, 0xF0 },
+ { KATANA_CODEC_MUTE, 0x00 },
+ { KATANA_CODEC_DSP_PROGRAM, 0x04 },
+ { KATANA_CODEC_DEEMPHASIS, 0x00 },
+ { KATANA_CODEC_DOP, 0x00 },
+ { KATANA_CODEC_FORMAT, 0xb4 },
+};
+
+static const char * const katana_codec_dsp_program_texts[] = {
+ "Linear Phase Fast Roll-off Filter",
+ "Linear Phase Slow Roll-off Filter",
+ "Minimum Phase Fast Roll-off Filter",
+ "Minimum Phase Slow Roll-off Filter",
+ "Apodizing Fast Roll-off Filter",
+ "Corrected Minimum Phase Fast Roll-off Filter",
+ "Brick Wall Filter",
+};
+
+static const unsigned int katana_codec_dsp_program_values[] = {
+ 0,
+ 1,
+ 2,
+ 3,
+ 4,
+ 6,
+ 7,
+};
+
+static SOC_VALUE_ENUM_SINGLE_DECL(katana_codec_dsp_program,
+ KATANA_CODEC_DSP_PROGRAM, 0, 0x07,
+ katana_codec_dsp_program_texts,
+ katana_codec_dsp_program_values);
+
+static const char * const katana_codec_deemphasis_texts[] = {
+ "Bypass",
+ "32kHz",
+ "44.1kHz",
+ "48kHz",
+};
+
+static const unsigned int katana_codec_deemphasis_values[] = {
+ 0,
+ 1,
+ 2,
+ 3,
+};
+
+static SOC_VALUE_ENUM_SINGLE_DECL(katana_codec_deemphasis,
+ KATANA_CODEC_DEEMPHASIS, 0, 0x03,
+ katana_codec_deemphasis_texts,
+ katana_codec_deemphasis_values);
+
+static const SNDRV_CTL_TLVD_DECLARE_DB_MINMAX(master_tlv, -12700, 0);
+
+static const struct snd_kcontrol_new katana_codec_controls[] = {
+ SOC_DOUBLE_R_TLV("Master Playback Volume", KATANA_CODEC_VOLUME_1,
+ KATANA_CODEC_VOLUME_2, 0, 255, 1, master_tlv),
+ SOC_DOUBLE("Master Playback Switch", KATANA_CODEC_MUTE, 0, 0, 1, 1),
+ SOC_ENUM("DSP Program Route", katana_codec_dsp_program),
+ SOC_ENUM("Deemphasis Route", katana_codec_deemphasis),
+ SOC_SINGLE("DoP Playback Switch", KATANA_CODEC_DOP, 0, 1, 1)
+};
+
+static bool katana_codec_readable_register(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case KATANA_CODEC_CHIP_ID_REG:
+ return true;
+ default:
+ return reg < 0xff;
+ }
+}
+
+static int katana_codec_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params,
+ struct snd_soc_dai *dai)
+{
+ struct snd_soc_component *component = dai->component;
+ struct katana_codec_priv *katana_codec = snd_soc_component_get_drvdata(component);
+ int fmt = 0;
+ int ret;
+
+ dev_dbg(component->card->dev, "hw_params %u Hz, %u channels\n",
+ params_rate(params),
+ params_channels(params));
+
+ switch (katana_codec->fmt & SND_SOC_DAIFMT_MASTER_MASK) {
+ case SND_SOC_DAIFMT_CBM_CFM: // master
+ if (params_channels(params) == 2)
+ fmt = KATANA_CODEC_CHAN_STEREO;
+ else
+ fmt = KATANA_CODEC_CHAN_MONO;
+
+ switch (params_width(params)) {
+ case 16:
+ fmt |= KATANA_CODEC_ALEN_16;
+ break;
+ case 24:
+ fmt |= KATANA_CODEC_ALEN_24;
+ break;
+ case 32:
+ fmt |= KATANA_CODEC_ALEN_32;
+ break;
+ default:
+ dev_err(component->card->dev, "Bad frame size: %d\n",
+ params_width(params));
+ return -EINVAL;
+ }
+
+ switch (params_rate(params)) {
+ case 44100:
+ fmt |= KATANA_CODEC_RATE_44100;
+ break;
+ case 48000:
+ fmt |= KATANA_CODEC_RATE_48000;
+ break;
+ case 88200:
+ fmt |= KATANA_CODEC_RATE_88200;
+ break;
+ case 96000:
+ fmt |= KATANA_CODEC_RATE_96000;
+ break;
+ case 176400:
+ fmt |= KATANA_CODEC_RATE_176400;
+ break;
+ case 192000:
+ fmt |= KATANA_CODEC_RATE_192000;
+ break;
+ case 352800:
+ fmt |= KATANA_CODEC_RATE_352800;
+ break;
+ case 384000:
+ fmt |= KATANA_CODEC_RATE_384000;
+ break;
+ default:
+ dev_err(component->card->dev, "Bad sample rate: %d\n",
+ params_rate(params));
+ return -EINVAL;
+ }
+
+ ret = regmap_write(katana_codec->regmap, KATANA_CODEC_FORMAT, fmt);
+ if (ret != 0) {
+ dev_err(component->card->dev, "Failed to set format: %d\n", ret);
+ return ret;
+ }
+ break;
+
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int katana_codec_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
+{
+ struct snd_soc_component *component = dai->component;
+ struct katana_codec_priv *katana_codec = snd_soc_component_get_drvdata(component);
+
+ katana_codec->fmt = fmt;
+
+ return 0;
+}
+
+static const struct snd_soc_dai_ops katana_codec_dai_ops = {
+ .hw_params = katana_codec_hw_params,
+ .set_fmt = katana_codec_set_fmt,
+};
+
+static struct snd_soc_dai_driver katana_codec_dai = {
+ .name = "allo-katana-codec",
+ .playback = {
+ .stream_name = "Playback",
+ .channels_min = 2,
+ .channels_max = 2,
+ .rates = SNDRV_PCM_RATE_CONTINUOUS,
+ .rate_min = 44100,
+ .rate_max = 384000,
+ .formats = SNDRV_PCM_FMTBIT_S16_LE |
+ SNDRV_PCM_FMTBIT_S32_LE
+ },
+ .ops = &katana_codec_dai_ops,
+};
+
+static struct snd_soc_component_driver katana_codec_component_driver = {
+ .idle_bias_on = true,
+
+ .controls = katana_codec_controls,
+ .num_controls = ARRAY_SIZE(katana_codec_controls),
+};
+
+static const struct regmap_range_cfg katana_codec_range = {
+ .name = "Pages", .range_min = KATANA_CODEC_VIRT_BASE,
+ .range_max = KATANA_CODEC_MAX_REGISTER,
+ .selector_reg = KATANA_CODEC_PAGE,
+ .selector_mask = 0xff,
+ .window_start = 0, .window_len = 0x100,
+};
+
+const struct regmap_config katana_codec_regmap = {
+ .reg_bits = 8,
+ .val_bits = 8,
+
+ .ranges = &katana_codec_range,
+ .num_ranges = 1,
+
+ .max_register = KATANA_CODEC_MAX_REGISTER,
+ .readable_reg = katana_codec_readable_register,
+ .reg_defaults = katana_codec_reg_defaults,
+ .num_reg_defaults = ARRAY_SIZE(katana_codec_reg_defaults),
+ .cache_type = REGCACHE_RBTREE,
+};
+
+static int allo_katana_component_probe(struct i2c_client *i2c,
+ const struct i2c_device_id *id)
+{
+ struct regmap *regmap;
+ struct regmap_config config = katana_codec_regmap;
+ struct device *dev = &i2c->dev;
+ struct katana_codec_priv *katana_codec;
+ unsigned int chip_id = 0;
+ int ret;
+
+ regmap = devm_regmap_init_i2c(i2c, &config);
+ if (IS_ERR(regmap))
+ return PTR_ERR(regmap);
+
+ katana_codec = devm_kzalloc(dev, sizeof(struct katana_codec_priv),
+ GFP_KERNEL);
+ if (!katana_codec)
+ return -ENOMEM;
+
+ dev_set_drvdata(dev, katana_codec);
+ katana_codec->regmap = regmap;
+
+ ret = regmap_read(regmap, KATANA_CODEC_CHIP_ID_REG, &chip_id);
+ if ((ret != 0) || (chip_id != KATANA_CODEC_CHIP_ID)) {
+ dev_err(dev, "Failed to read Chip or wrong Chip id: %d\n", ret);
+ return ret;
+ }
+ regmap_update_bits(regmap, KATANA_CODEC_RESET, 0x01, 0x01);
+ msleep(10);
+
+ ret = snd_soc_register_component(dev, &katana_codec_component_driver,
+ &katana_codec_dai, 1);
+ if (ret != 0) {
+ dev_err(dev, "failed to register codec: %d\n", ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+static int allo_katana_component_remove(struct i2c_client *i2c)
+{
+ snd_soc_unregister_component(&i2c->dev);
+ return 0;
+}
+
+static const struct i2c_device_id allo_katana_component_id[] = {
+ { "allo-katana-codec", },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, allo_katana_component_id);
+
+static const struct of_device_id allo_katana_codec_of_match[] = {
+ { .compatible = "allo,allo-katana-codec", },
+ { }
+};
+MODULE_DEVICE_TABLE(of, allo_katana_codec_of_match);
+
+static struct i2c_driver allo_katana_component_driver = {
+ .probe = allo_katana_component_probe,
+ .remove = allo_katana_component_remove,
+ .id_table = allo_katana_component_id,
+ .driver = {
+ .name = "allo-katana-codec",
+ .of_match_table = allo_katana_codec_of_match,
+ },
+};
+
+module_i2c_driver(allo_katana_component_driver);
+
+MODULE_DESCRIPTION("ASoC Allo Katana Codec Driver");
+MODULE_AUTHOR("Jaikumar <jaikumar@cem-solutions.net>");
+MODULE_LICENSE("GPL v2");
projects / platform / kernel / linux-rpi.git / commitdiff