linux/sound/soc/codecs/tpa6130a2.c

427 lines
10 KiB
C
Raw Normal View History

/*
* ALSA SoC Texas Instruments TPA6130A2 headset stereo amplifier driver
*
* Copyright (C) Nokia Corporation
*
* Author: Peter Ujfalusi <peter.ujfalusi@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/errno.h>
#include <linux/device.h>
#include <linux/i2c.h>
#include <linux/gpio.h>
#include <linux/regulator/consumer.h>
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo <tj@kernel.org> Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-24 08:04:11 +00:00
#include <linux/slab.h>
#include <sound/tpa6130a2-plat.h>
#include <sound/soc.h>
#include <sound/tlv.h>
#include <linux/of.h>
#include <linux/of_gpio.h>
#include <linux/regmap.h>
#include "tpa6130a2.h"
enum tpa_model {
TPA6130A2,
TPA6140A2,
};
static struct i2c_client *tpa6130a2_client;
/* This struct is used to save the context */
struct tpa6130a2_data {
struct mutex mutex;
struct regmap *regmap;
struct regulator *supply;
int power_gpio;
u8 power_state:1;
enum tpa_model id;
};
static int tpa6130a2_power(u8 power)
{
struct tpa6130a2_data *data;
int ret = 0;
if (WARN_ON(!tpa6130a2_client))
return -EINVAL;
data = i2c_get_clientdata(tpa6130a2_client);
mutex_lock(&data->mutex);
if (power == data->power_state)
goto exit;
if (power) {
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 = regcache_sync(data->regmap);
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;
}
} else {
/* set SWS */
regmap_update_bits(data->regmap, TPA6130A2_REG_CONTROL,
TPA6130A2_SWS, TPA6130A2_SWS);
/* 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;
/* device regs does not match the cache state anymore */
regcache_mark_dirty(data->regmap);
}
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, val;
unsigned int mask = (1 << fls(max)) - 1;
unsigned int invert = mc->invert;
if (WARN_ON(!tpa6130a2_client))
return -EINVAL;
data = i2c_get_clientdata(tpa6130a2_client);
mutex_lock(&data->mutex);
regmap_read(data->regmap, reg, &val);
ucontrol->value.integer.value[0] = (val >> 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);
bool change;
if (WARN_ON(!tpa6130a2_client))
return -EINVAL;
data = i2c_get_clientdata(tpa6130a2_client);
if (invert)
val = max - val;
mutex_lock(&data->mutex);
regmap_update_bits_check(data->regmap, reg, mask << shift, val << shift,
&change);
mutex_unlock(&data->mutex);
return change;
}
/*
* TPA6130 volume. From -59.5 to 4 dB with increasing step size when going
* down in gain.
*/
static const DECLARE_TLV_DB_RANGE(tpa6130_tlv,
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("Headphone Playback Volume",
TPA6130A2_REG_VOL_MUTE, 0, 0x3f, 0,
tpa6130a2_get_volsw, tpa6130a2_put_volsw,
tpa6130_tlv),
};
static const DECLARE_TLV_DB_RANGE(tpa6140_tlv,
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("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)
{
struct tpa6130a2_data *data = i2c_get_clientdata(tpa6130a2_client);
if (enable) {
/* Enable channel */
/* Enable amplifier */
regmap_update_bits(data->regmap, TPA6130A2_REG_CONTROL,
channel | TPA6130A2_SWS, channel & ~TPA6130A2_SWS);
/* Unmute channel */
regmap_update_bits(data->regmap, TPA6130A2_REG_VOL_MUTE,
channel, 0);
} else {
/* Disable channel */
/* Mute channel */
regmap_update_bits(data->regmap, TPA6130A2_REG_VOL_MUTE,
channel, channel);
/* Disable amplifier */
regmap_update_bits(data->regmap, TPA6130A2_REG_CONTROL,
channel, 0);
}
}
int tpa6130a2_stereo_enable(struct snd_soc_codec *codec, int enable)
{
int ret = 0;
if (enable) {
ret = tpa6130a2_power(1);
if (ret < 0)
return ret;
tpa6130a2_channel_enable(TPA6130A2_HP_EN_R | TPA6130A2_HP_EN_L,
1);
} else {
tpa6130a2_channel_enable(TPA6130A2_HP_EN_R | TPA6130A2_HP_EN_L,
0);
ret = tpa6130a2_power(0);
}
return ret;
}
EXPORT_SYMBOL_GPL(tpa6130a2_stereo_enable);
static int tpa6130a2_component_probe(struct snd_soc_component *component)
{
struct tpa6130a2_data *data = snd_soc_component_get_drvdata(component);
if (data->id == TPA6140A2)
return snd_soc_add_component_controls(component,
tpa6140a2_controls, ARRAY_SIZE(tpa6140a2_controls));
else
return snd_soc_add_component_controls(component,
tpa6130a2_controls, ARRAY_SIZE(tpa6130a2_controls));
}
struct snd_soc_component_driver tpa6130a2_component_driver = {
.name = "tpa6130a2",
.probe = tpa6130a2_component_probe,
};
static const struct reg_default tpa6130a2_reg_defaults[] = {
{ TPA6130A2_REG_CONTROL, TPA6130A2_SWS },
{ TPA6130A2_REG_VOL_MUTE, TPA6130A2_MUTE_R | TPA6130A2_MUTE_L },
};
static const struct regmap_config tpa6130a2_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.max_register = TPA6130A2_REG_VERSION,
.reg_defaults = tpa6130a2_reg_defaults,
.num_reg_defaults = ARRAY_SIZE(tpa6130a2_reg_defaults),
.cache_type = REGCACHE_RBTREE,
};
static int tpa6130a2_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct device *dev;
struct tpa6130a2_data *data;
struct tpa6130a2_platform_data *pdata = client->dev.platform_data;
struct device_node *np = client->dev.of_node;
const char *regulator;
unsigned int version;
int ret;
dev = &client->dev;
data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL);
if (!data)
return -ENOMEM;
data->regmap = devm_regmap_init_i2c(client, &tpa6130a2_regmap_config);
if (IS_ERR(data->regmap))
return PTR_ERR(data->regmap);
if (pdata) {
data->power_gpio = pdata->power_gpio;
} else if (np) {
data->power_gpio = of_get_named_gpio(np, "power-gpio", 0);
} else {
dev_err(dev, "Platform data not set\n");
dump_stack();
return -ENODEV;
}
tpa6130a2_client = client;
i2c_set_clientdata(tpa6130a2_client, data);
data->id = id->driver_data;
mutex_init(&data->mutex);
if (data->power_gpio >= 0) {
ret = devm_gpio_request(dev, 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",
data->id);
case TPA6130A2:
regulator = "Vdd";
break;
case TPA6140A2:
regulator = "AVdd";
break;
}
data->supply = devm_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_gpio;
}
ret = tpa6130a2_power(1);
if (ret != 0)
goto err_gpio;
/* Read version */
regmap_read(data->regmap, TPA6130A2_REG_VERSION, &version);
version &= TPA6130A2_VERSION_MASK;
if ((version != 1) && (version != 2))
dev_warn(dev, "UNTESTED version detected (%d)\n", version);
/* Disable the chip */
ret = tpa6130a2_power(0);
if (ret != 0)
goto err_gpio;
return devm_snd_soc_register_component(&client->dev,
&tpa6130a2_component_driver, NULL, 0);
err_gpio:
tpa6130a2_client = NULL;
return ret;
}
static int tpa6130a2_remove(struct i2c_client *client)
{
tpa6130a2_power(0);
tpa6130a2_client = NULL;
return 0;
}
static const struct i2c_device_id tpa6130a2_id[] = {
{ "tpa6130a2", TPA6130A2 },
{ "tpa6140a2", TPA6140A2 },
{ }
};
MODULE_DEVICE_TABLE(i2c, tpa6130a2_id);
#if IS_ENABLED(CONFIG_OF)
static const struct of_device_id tpa6130a2_of_match[] = {
{ .compatible = "ti,tpa6130a2", },
{ .compatible = "ti,tpa6140a2" },
{},
};
MODULE_DEVICE_TABLE(of, tpa6130a2_of_match);
#endif
static struct i2c_driver tpa6130a2_i2c_driver = {
.driver = {
.name = "tpa6130a2",
.of_match_table = of_match_ptr(tpa6130a2_of_match),
},
.probe = tpa6130a2_probe,
.remove = tpa6130a2_remove,
.id_table = tpa6130a2_id,
};
module_i2c_driver(tpa6130a2_i2c_driver);
MODULE_AUTHOR("Peter Ujfalusi <peter.ujfalusi@ti.com>");
MODULE_DESCRIPTION("TPA6130A2 Headphone amplifier driver");
MODULE_LICENSE("GPL");