| /* |
| * ALSA SoC Texas Instruments TPA6130A2 headset stereo amplifier driver |
| * |
| * Copyright (C) Nokia Corporation |
| * |
| * Author: Peter Ujfalusi <peter.ujfalusi@nokia.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/errno.h> |
| #include <linux/device.h> |
| #include <linux/i2c.h> |
| #include <linux/gpio.h> |
| #include <linux/regulator/consumer.h> |
| #include <linux/slab.h> |
| #include <sound/tpa6130a2-plat.h> |
| #include <sound/soc.h> |
| #include <sound/tlv.h> |
| |
| #include "tpa6130a2.h" |
| |
| static struct i2c_client *tpa6130a2_client; |
| |
| /* This struct is used to save the context */ |
| struct tpa6130a2_data { |
| struct mutex mutex; |
| unsigned char regs[TPA6130A2_CACHEREGNUM]; |
| struct regulator *supply; |
| int power_gpio; |
| unsigned char power_state; |
| enum tpa_model id; |
| }; |
| |
| static int tpa6130a2_i2c_read(int reg) |
| { |
| struct tpa6130a2_data *data; |
| int val; |
| |
| BUG_ON(tpa6130a2_client == NULL); |
| data = i2c_get_clientdata(tpa6130a2_client); |
| |
| /* If powered off, return the cached value */ |
| if (data->power_state) { |
| val = i2c_smbus_read_byte_data(tpa6130a2_client, reg); |
| if (val < 0) |
| dev_err(&tpa6130a2_client->dev, "Read failed\n"); |
| else |
| data->regs[reg] = val; |
| } else { |
| val = data->regs[reg]; |
| } |
| |
| return val; |
| } |
| |
| static int tpa6130a2_i2c_write(int reg, u8 value) |
| { |
| struct tpa6130a2_data *data; |
| int val = 0; |
| |
| BUG_ON(tpa6130a2_client == NULL); |
| data = i2c_get_clientdata(tpa6130a2_client); |
| |
| if (data->power_state) { |
| val = i2c_smbus_write_byte_data(tpa6130a2_client, reg, value); |
| if (val < 0) { |
| dev_err(&tpa6130a2_client->dev, "Write failed\n"); |
| return val; |
| } |
| } |
| |
| /* Either powered on or off, we save the context */ |
| data->regs[reg] = value; |
| |
| return val; |
| } |
| |
| static u8 tpa6130a2_read(int reg) |
| { |
| struct tpa6130a2_data *data; |
| |
| BUG_ON(tpa6130a2_client == NULL); |
| data = i2c_get_clientdata(tpa6130a2_client); |
| |
| return data->regs[reg]; |
| } |
| |
| static int tpa6130a2_initialize(void) |
| { |
| struct tpa6130a2_data *data; |
| int i, ret = 0; |
| |
| BUG_ON(tpa6130a2_client == NULL); |
| data = i2c_get_clientdata(tpa6130a2_client); |
| |
| for (i = 1; i < TPA6130A2_REG_VERSION; i++) { |
| ret = tpa6130a2_i2c_write(i, data->regs[i]); |
| if (ret < 0) |
| break; |
| } |
| |
| return ret; |
| } |
| |
| static int tpa6130a2_power(int power) |
| { |
| struct tpa6130a2_data *data; |
| u8 val; |
| int ret = 0; |
| |
| BUG_ON(tpa6130a2_client == NULL); |
| data = i2c_get_clientdata(tpa6130a2_client); |
| |
| mutex_lock(&data->mutex); |
| if (power && !data->power_state) { |
| |
| ret = regulator_enable(data->supply); |
| if (ret != 0) { |
| dev_err(&tpa6130a2_client->dev, |
| "Failed to enable supply: %d\n", ret); |
| goto exit; |
| } |
| /* Power on */ |
| if (data->power_gpio >= 0) |
| gpio_set_value(data->power_gpio, 1); |
| |
| data->power_state = 1; |
| ret = tpa6130a2_initialize(); |
| if (ret < 0) { |
| dev_err(&tpa6130a2_client->dev, |
| "Failed to initialize chip\n"); |
| if (data->power_gpio >= 0) |
| gpio_set_value(data->power_gpio, 0); |
| regulator_disable(data->supply); |
| data->power_state = 0; |
| goto exit; |
| } |
| |
| /* Clear SWS */ |
| val = tpa6130a2_read(TPA6130A2_REG_CONTROL); |
| val &= ~TPA6130A2_SWS; |
| tpa6130a2_i2c_write(TPA6130A2_REG_CONTROL, val); |
| } else if (!power && data->power_state) { |
| /* set SWS */ |
| val = tpa6130a2_read(TPA6130A2_REG_CONTROL); |
| val |= TPA6130A2_SWS; |
| tpa6130a2_i2c_write(TPA6130A2_REG_CONTROL, val); |
| |
| /* Power off */ |
| if (data->power_gpio >= 0) |
| gpio_set_value(data->power_gpio, 0); |
| |
| ret = regulator_disable(data->supply); |
| if (ret != 0) { |
| dev_err(&tpa6130a2_client->dev, |
| "Failed to disable supply: %d\n", ret); |
| goto exit; |
| } |
| |
| data->power_state = 0; |
| } |
| |
| exit: |
| mutex_unlock(&data->mutex); |
| return ret; |
| } |
| |
| static int tpa6130a2_get_volsw(struct snd_kcontrol *kcontrol, |
| struct snd_ctl_elem_value *ucontrol) |
| { |
| struct soc_mixer_control *mc = |
| (struct soc_mixer_control *)kcontrol->private_value; |
| struct tpa6130a2_data *data; |
| unsigned int reg = mc->reg; |
| unsigned int shift = mc->shift; |
| int max = mc->max; |
| unsigned int mask = (1 << fls(max)) - 1; |
| unsigned int invert = mc->invert; |
| |
| BUG_ON(tpa6130a2_client == NULL); |
| data = i2c_get_clientdata(tpa6130a2_client); |
| |
| mutex_lock(&data->mutex); |
| |
| ucontrol->value.integer.value[0] = |
| (tpa6130a2_read(reg) >> shift) & mask; |
| |
| if (invert) |
| ucontrol->value.integer.value[0] = |
| max - ucontrol->value.integer.value[0]; |
| |
| mutex_unlock(&data->mutex); |
| return 0; |
| } |
| |
| static int tpa6130a2_put_volsw(struct snd_kcontrol *kcontrol, |
| struct snd_ctl_elem_value *ucontrol) |
| { |
| struct soc_mixer_control *mc = |
| (struct soc_mixer_control *)kcontrol->private_value; |
| struct tpa6130a2_data *data; |
| unsigned int reg = mc->reg; |
| unsigned int shift = mc->shift; |
| int max = mc->max; |
| unsigned int mask = (1 << fls(max)) - 1; |
| unsigned int invert = mc->invert; |
| unsigned int val = (ucontrol->value.integer.value[0] & mask); |
| unsigned int val_reg; |
| |
| BUG_ON(tpa6130a2_client == NULL); |
| data = i2c_get_clientdata(tpa6130a2_client); |
| |
| if (invert) |
| val = max - val; |
| |
| mutex_lock(&data->mutex); |
| |
| val_reg = tpa6130a2_read(reg); |
| if (((val_reg >> shift) & mask) == val) { |
| mutex_unlock(&data->mutex); |
| return 0; |
| } |
| |
| val_reg &= ~(mask << shift); |
| val_reg |= val << shift; |
| tpa6130a2_i2c_write(reg, val_reg); |
| |
| mutex_unlock(&data->mutex); |
| |
| return 1; |
| } |
| |
| /* |
| * TPA6130 volume. From -59.5 to 4 dB with increasing step size when going |
| * down in gain. |
| */ |
| static const unsigned int tpa6130_tlv[] = { |
| TLV_DB_RANGE_HEAD(10), |
| 0, 1, TLV_DB_SCALE_ITEM(-5950, 600, 0), |
| 2, 3, TLV_DB_SCALE_ITEM(-5000, 250, 0), |
| 4, 5, TLV_DB_SCALE_ITEM(-4550, 160, 0), |
| 6, 7, TLV_DB_SCALE_ITEM(-4140, 190, 0), |
| 8, 9, TLV_DB_SCALE_ITEM(-3650, 120, 0), |
| 10, 11, TLV_DB_SCALE_ITEM(-3330, 160, 0), |
| 12, 13, TLV_DB_SCALE_ITEM(-3040, 180, 0), |
| 14, 20, TLV_DB_SCALE_ITEM(-2710, 110, 0), |
| 21, 37, TLV_DB_SCALE_ITEM(-1960, 74, 0), |
| 38, 63, TLV_DB_SCALE_ITEM(-720, 45, 0), |
| }; |
| |
| static const struct snd_kcontrol_new tpa6130a2_controls[] = { |
| SOC_SINGLE_EXT_TLV("TPA6130A2 Headphone Playback Volume", |
| TPA6130A2_REG_VOL_MUTE, 0, 0x3f, 0, |
| tpa6130a2_get_volsw, tpa6130a2_put_volsw, |
| tpa6130_tlv), |
| }; |
| |
| static const unsigned int tpa6140_tlv[] = { |
| TLV_DB_RANGE_HEAD(3), |
| 0, 8, TLV_DB_SCALE_ITEM(-5900, 400, 0), |
| 9, 16, TLV_DB_SCALE_ITEM(-2500, 200, 0), |
| 17, 31, TLV_DB_SCALE_ITEM(-1000, 100, 0), |
| }; |
| |
| static const struct snd_kcontrol_new tpa6140a2_controls[] = { |
| SOC_SINGLE_EXT_TLV("TPA6140A2 Headphone Playback Volume", |
| TPA6130A2_REG_VOL_MUTE, 1, 0x1f, 0, |
| tpa6130a2_get_volsw, tpa6130a2_put_volsw, |
| tpa6140_tlv), |
| }; |
| |
| /* |
| * Enable or disable channel (left or right) |
| * The bit number for mute and amplifier are the same per channel: |
| * bit 6: Right channel |
| * bit 7: Left channel |
| * in both registers. |
| */ |
| static void tpa6130a2_channel_enable(u8 channel, int enable) |
| { |
| u8 val; |
| |
| if (enable) { |
| /* Enable channel */ |
| /* Enable amplifier */ |
| val = tpa6130a2_read(TPA6130A2_REG_CONTROL); |
| val |= channel; |
| tpa6130a2_i2c_write(TPA6130A2_REG_CONTROL, val); |
| |
| /* Unmute channel */ |
| val = tpa6130a2_read(TPA6130A2_REG_VOL_MUTE); |
| val &= ~channel; |
| tpa6130a2_i2c_write(TPA6130A2_REG_VOL_MUTE, val); |
| } else { |
| /* Disable channel */ |
| /* Mute channel */ |
| val = tpa6130a2_read(TPA6130A2_REG_VOL_MUTE); |
| val |= channel; |
| tpa6130a2_i2c_write(TPA6130A2_REG_VOL_MUTE, val); |
| |
| /* Disable amplifier */ |
| val = tpa6130a2_read(TPA6130A2_REG_CONTROL); |
| val &= ~channel; |
| tpa6130a2_i2c_write(TPA6130A2_REG_CONTROL, val); |
| } |
| } |
| |
| static int tpa6130a2_left_event(struct snd_soc_dapm_widget *w, |
| struct snd_kcontrol *kcontrol, int event) |
| { |
| switch (event) { |
| case SND_SOC_DAPM_POST_PMU: |
| tpa6130a2_channel_enable(TPA6130A2_HP_EN_L, 1); |
| break; |
| case SND_SOC_DAPM_POST_PMD: |
| tpa6130a2_channel_enable(TPA6130A2_HP_EN_L, 0); |
| break; |
| } |
| return 0; |
| } |
| |
| static int tpa6130a2_right_event(struct snd_soc_dapm_widget *w, |
| struct snd_kcontrol *kcontrol, int event) |
| { |
| switch (event) { |
| case SND_SOC_DAPM_POST_PMU: |
| tpa6130a2_channel_enable(TPA6130A2_HP_EN_R, 1); |
| break; |
| case SND_SOC_DAPM_POST_PMD: |
| tpa6130a2_channel_enable(TPA6130A2_HP_EN_R, 0); |
| break; |
| } |
| return 0; |
| } |
| |
| static int tpa6130a2_supply_event(struct snd_soc_dapm_widget *w, |
| struct snd_kcontrol *kcontrol, int event) |
| { |
| int ret = 0; |
| |
| switch (event) { |
| case SND_SOC_DAPM_POST_PMU: |
| ret = tpa6130a2_power(1); |
| break; |
| case SND_SOC_DAPM_POST_PMD: |
| ret = tpa6130a2_power(0); |
| break; |
| } |
| return ret; |
| } |
| |
| static const struct snd_soc_dapm_widget tpa6130a2_dapm_widgets[] = { |
| SND_SOC_DAPM_PGA_E("TPA6130A2 Left", SND_SOC_NOPM, |
| 0, 0, NULL, 0, tpa6130a2_left_event, |
| SND_SOC_DAPM_POST_PMU|SND_SOC_DAPM_POST_PMD), |
| SND_SOC_DAPM_PGA_E("TPA6130A2 Right", SND_SOC_NOPM, |
| 0, 0, NULL, 0, tpa6130a2_right_event, |
| SND_SOC_DAPM_POST_PMU|SND_SOC_DAPM_POST_PMD), |
| SND_SOC_DAPM_SUPPLY("TPA6130A2 Enable", SND_SOC_NOPM, |
| 0, 0, tpa6130a2_supply_event, |
| SND_SOC_DAPM_POST_PMU|SND_SOC_DAPM_POST_PMD), |
| /* Outputs */ |
| SND_SOC_DAPM_OUTPUT("TPA6130A2 Headphone Left"), |
| SND_SOC_DAPM_OUTPUT("TPA6130A2 Headphone Right"), |
| }; |
| |
| static const struct snd_soc_dapm_route audio_map[] = { |
| {"TPA6130A2 Headphone Left", NULL, "TPA6130A2 Left"}, |
| {"TPA6130A2 Headphone Right", NULL, "TPA6130A2 Right"}, |
| |
| {"TPA6130A2 Headphone Left", NULL, "TPA6130A2 Enable"}, |
| {"TPA6130A2 Headphone Right", NULL, "TPA6130A2 Enable"}, |
| }; |
| |
| int tpa6130a2_add_controls(struct snd_soc_codec *codec) |
| { |
| struct tpa6130a2_data *data; |
| struct snd_soc_dapm_context *dapm = &codec->dapm; |
| |
| if (tpa6130a2_client == NULL) |
| return -ENODEV; |
| |
| data = i2c_get_clientdata(tpa6130a2_client); |
| |
| snd_soc_dapm_new_controls(dapm, tpa6130a2_dapm_widgets, |
| ARRAY_SIZE(tpa6130a2_dapm_widgets)); |
| |
| snd_soc_dapm_add_routes(dapm, audio_map, ARRAY_SIZE(audio_map)); |
| |
| if (data->id == TPA6140A2) |
| return snd_soc_add_controls(codec, tpa6140a2_controls, |
| ARRAY_SIZE(tpa6140a2_controls)); |
| else |
| return snd_soc_add_controls(codec, tpa6130a2_controls, |
| ARRAY_SIZE(tpa6130a2_controls)); |
| |
| } |
| EXPORT_SYMBOL_GPL(tpa6130a2_add_controls); |
| |
| static int __devinit tpa6130a2_probe(struct i2c_client *client, |
| const struct i2c_device_id *id) |
| { |
| struct device *dev; |
| struct tpa6130a2_data *data; |
| struct tpa6130a2_platform_data *pdata; |
| const char *regulator; |
| int ret; |
| |
| dev = &client->dev; |
| |
| if (client->dev.platform_data == NULL) { |
| dev_err(dev, "Platform data not set\n"); |
| dump_stack(); |
| return -ENODEV; |
| } |
| |
| data = kzalloc(sizeof(*data), GFP_KERNEL); |
| if (data == NULL) { |
| dev_err(dev, "Can not allocate memory\n"); |
| return -ENOMEM; |
| } |
| |
| tpa6130a2_client = client; |
| |
| i2c_set_clientdata(tpa6130a2_client, data); |
| |
| pdata = client->dev.platform_data; |
| data->power_gpio = pdata->power_gpio; |
| data->id = pdata->id; |
| |
| mutex_init(&data->mutex); |
| |
| /* Set default register values */ |
| data->regs[TPA6130A2_REG_CONTROL] = TPA6130A2_SWS; |
| data->regs[TPA6130A2_REG_VOL_MUTE] = TPA6130A2_MUTE_R | |
| TPA6130A2_MUTE_L; |
| |
| if (data->power_gpio >= 0) { |
| ret = gpio_request(data->power_gpio, "tpa6130a2 enable"); |
| if (ret < 0) { |
| dev_err(dev, "Failed to request power GPIO (%d)\n", |
| data->power_gpio); |
| goto err_gpio; |
| } |
| gpio_direction_output(data->power_gpio, 0); |
| } |
| |
| switch (data->id) { |
| default: |
| dev_warn(dev, "Unknown TPA model (%d). Assuming 6130A2\n", |
| pdata->id); |
| case TPA6130A2: |
| regulator = "Vdd"; |
| break; |
| case TPA6140A2: |
| regulator = "AVdd"; |
| break; |
| } |
| |
| data->supply = regulator_get(dev, regulator); |
| if (IS_ERR(data->supply)) { |
| ret = PTR_ERR(data->supply); |
| dev_err(dev, "Failed to request supply: %d\n", ret); |
| goto err_regulator; |
| } |
| |
| ret = tpa6130a2_power(1); |
| if (ret != 0) |
| goto err_power; |
| |
| |
| /* Read version */ |
| ret = tpa6130a2_i2c_read(TPA6130A2_REG_VERSION) & |
| TPA6130A2_VERSION_MASK; |
| if ((ret != 1) && (ret != 2)) |
| dev_warn(dev, "UNTESTED version detected (%d)\n", ret); |
| |
| /* Disable the chip */ |
| ret = tpa6130a2_power(0); |
| if (ret != 0) |
| goto err_power; |
| |
| return 0; |
| |
| err_power: |
| regulator_put(data->supply); |
| err_regulator: |
| if (data->power_gpio >= 0) |
| gpio_free(data->power_gpio); |
| err_gpio: |
| kfree(data); |
| i2c_set_clientdata(tpa6130a2_client, NULL); |
| tpa6130a2_client = NULL; |
| |
| return ret; |
| } |
| |
| static int __devexit tpa6130a2_remove(struct i2c_client *client) |
| { |
| struct tpa6130a2_data *data = i2c_get_clientdata(client); |
| |
| tpa6130a2_power(0); |
| |
| if (data->power_gpio >= 0) |
| gpio_free(data->power_gpio); |
| |
| regulator_put(data->supply); |
| |
| kfree(data); |
| tpa6130a2_client = NULL; |
| |
| return 0; |
| } |
| |
| static const struct i2c_device_id tpa6130a2_id[] = { |
| { "tpa6130a2", 0 }, |
| { } |
| }; |
| MODULE_DEVICE_TABLE(i2c, tpa6130a2_id); |
| |
| static struct i2c_driver tpa6130a2_i2c_driver = { |
| .driver = { |
| .name = "tpa6130a2", |
| .owner = THIS_MODULE, |
| }, |
| .probe = tpa6130a2_probe, |
| .remove = __devexit_p(tpa6130a2_remove), |
| .id_table = tpa6130a2_id, |
| }; |
| |
| static int __init tpa6130a2_init(void) |
| { |
| return i2c_add_driver(&tpa6130a2_i2c_driver); |
| } |
| |
| static void __exit tpa6130a2_exit(void) |
| { |
| i2c_del_driver(&tpa6130a2_i2c_driver); |
| } |
| |
| MODULE_AUTHOR("Peter Ujfalusi"); |
| MODULE_DESCRIPTION("TPA6130A2 Headphone amplifier driver"); |
| MODULE_LICENSE("GPL"); |
| |
| module_init(tpa6130a2_init); |
| module_exit(tpa6130a2_exit); |