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linux-next/drivers/mfd/twl4030-codec.c
Liam Girdwood f0fba2ad1b ASoC: multi-component - ASoC Multi-Component Support
This patch extends the ASoC API to allow sound cards to have more than one
CODEC and more than one platform DMA controller. This is achieved by dividing
some current ASoC structures that contain both driver data and device data into
structures that only either contain device data or driver data. i.e.

 struct snd_soc_codec    --->  struct snd_soc_codec (device data)
                          +->  struct snd_soc_codec_driver (driver data)

 struct snd_soc_platform --->  struct snd_soc_platform (device data)
                          +->  struct snd_soc_platform_driver (driver data)

 struct snd_soc_dai      --->  struct snd_soc_dai (device data)
                          +->  struct snd_soc_dai_driver (driver data)

 struct snd_soc_device   --->  deleted

This now allows ASoC to be more tightly aligned with the Linux driver model and
also means that every ASoC codec, platform and (platform) DAI is a kernel
device. ASoC component private data is now stored as device private data.

The ASoC sound card struct snd_soc_card has also been updated to store lists
of it's components rather than a pointer to a codec and platform. The PCM
runtime struct soc_pcm_runtime now has pointers to all its components.

This patch adds DAPM support for ASoC multi-component and removes struct
snd_soc_socdev from DAPM core. All DAPM calls are now made on a card, codec
or runtime PCM level basis rather than using snd_soc_socdev.

Other notable multi-component changes:-

 * Stream operations now de-reference less structures.
 * close_delayed work() now runs on a DAI basis rather than looping all DAIs
   in a card.
 * PM suspend()/resume() operations can now handle N CODECs and Platforms
   per sound card.
 * Added soc_bind_dai_link() to bind the component devices to the sound card.
 * Added soc_dai_link_probe() and soc_dai_link_remove() to probe and remove
   DAI link components.
 * sysfs entries can now be registered per component per card.
 * snd_soc_new_pcms() functionailty rolled into dai_link_probe().
 * snd_soc_register_codec() now does all the codec list and mutex init.

This patch changes the probe() and remove() of the CODEC drivers as follows:-

 o Make CODEC driver a platform driver
 o Moved all struct snd_soc_codec list, mutex, etc initialiasation to core.
 o Removed all static codec pointers (drivers now support > 1 codec dev)
 o snd_soc_register_pcms() now done by core.
 o snd_soc_register_dai() folded into snd_soc_register_codec().

CS4270 portions:
Acked-by: Timur Tabi <timur@freescale.com>

Some TLV320aic23 and Cirrus platform fixes.
Signed-off-by: Ryan Mallon <ryan@bluewatersys.com>

TI CODEC and OMAP fixes
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@nokia.com>
Signed-off-by: Janusz Krzysztofik <jkrzyszt@tis.icnet.pl>
Signed-off-by: Jarkko Nikula <jhnikula@gmail.com>

Samsung platform and misc fixes :-
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Reviewed-by: Jassi Brar <jassi.brar@samsung.com>
Signed-off-by: Seungwhan Youn <sw.youn@samsung.com>

MPC8610 and PPC fixes.
Signed-off-by: Timur Tabi <timur@freescale.com>

i.MX fixes and some core fixes.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

J4740 platform fixes:-
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>

CC: Tony Lindgren <tony@atomide.com>
CC: Nicolas Ferre <nicolas.ferre@atmel.com>
CC: Kevin Hilman <khilman@deeprootsystems.com>
CC: Sascha Hauer <s.hauer@pengutronix.de>
CC: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
CC: Kuninori Morimoto <morimoto.kuninori@renesas.com>
CC: Daniel Gloeckner <dg@emlix.com>
CC: Manuel Lauss <mano@roarinelk.homelinux.net>
CC: Mike Frysinger <vapier.adi@gmail.com>
CC: Arnaud Patard <apatard@mandriva.com>
CC: Wan ZongShun <mcuos.com@gmail.com>

Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
2010-08-12 14:00:00 +01:00

278 lines
6.6 KiB
C

/*
* MFD driver for twl4030 codec submodule
*
* Author: Peter Ujfalusi <peter.ujfalusi@nokia.com>
*
* Copyright: (C) 2009 Nokia Corporation
*
* 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/types.h>
#include <linux/slab.h>
#include <linux/kernel.h>
#include <linux/fs.h>
#include <linux/platform_device.h>
#include <linux/i2c/twl.h>
#include <linux/mfd/core.h>
#include <linux/mfd/twl4030-codec.h>
#define TWL4030_CODEC_CELLS 2
static struct platform_device *twl4030_codec_dev;
struct twl4030_codec_resource {
int request_count;
u8 reg;
u8 mask;
};
struct twl4030_codec {
unsigned int audio_mclk;
struct mutex mutex;
struct twl4030_codec_resource resource[TWL4030_CODEC_RES_MAX];
struct mfd_cell cells[TWL4030_CODEC_CELLS];
};
/*
* Modify the resource, the function returns the content of the register
* after the modification.
*/
static int twl4030_codec_set_resource(enum twl4030_codec_res id, int enable)
{
struct twl4030_codec *codec = platform_get_drvdata(twl4030_codec_dev);
u8 val;
twl_i2c_read_u8(TWL4030_MODULE_AUDIO_VOICE, &val,
codec->resource[id].reg);
if (enable)
val |= codec->resource[id].mask;
else
val &= ~codec->resource[id].mask;
twl_i2c_write_u8(TWL4030_MODULE_AUDIO_VOICE,
val, codec->resource[id].reg);
return val;
}
static inline int twl4030_codec_get_resource(enum twl4030_codec_res id)
{
struct twl4030_codec *codec = platform_get_drvdata(twl4030_codec_dev);
u8 val;
twl_i2c_read_u8(TWL4030_MODULE_AUDIO_VOICE, &val,
codec->resource[id].reg);
return val;
}
/*
* Enable the resource.
* The function returns with error or the content of the register
*/
int twl4030_codec_enable_resource(enum twl4030_codec_res id)
{
struct twl4030_codec *codec = platform_get_drvdata(twl4030_codec_dev);
int val;
if (id >= TWL4030_CODEC_RES_MAX) {
dev_err(&twl4030_codec_dev->dev,
"Invalid resource ID (%u)\n", id);
return -EINVAL;
}
mutex_lock(&codec->mutex);
if (!codec->resource[id].request_count)
/* Resource was disabled, enable it */
val = twl4030_codec_set_resource(id, 1);
else
val = twl4030_codec_get_resource(id);
codec->resource[id].request_count++;
mutex_unlock(&codec->mutex);
return val;
}
EXPORT_SYMBOL_GPL(twl4030_codec_enable_resource);
/*
* Disable the resource.
* The function returns with error or the content of the register
*/
int twl4030_codec_disable_resource(unsigned id)
{
struct twl4030_codec *codec = platform_get_drvdata(twl4030_codec_dev);
int val;
if (id >= TWL4030_CODEC_RES_MAX) {
dev_err(&twl4030_codec_dev->dev,
"Invalid resource ID (%u)\n", id);
return -EINVAL;
}
mutex_lock(&codec->mutex);
if (!codec->resource[id].request_count) {
dev_err(&twl4030_codec_dev->dev,
"Resource has been disabled already (%u)\n", id);
mutex_unlock(&codec->mutex);
return -EPERM;
}
codec->resource[id].request_count--;
if (!codec->resource[id].request_count)
/* Resource can be disabled now */
val = twl4030_codec_set_resource(id, 0);
else
val = twl4030_codec_get_resource(id);
mutex_unlock(&codec->mutex);
return val;
}
EXPORT_SYMBOL_GPL(twl4030_codec_disable_resource);
unsigned int twl4030_codec_get_mclk(void)
{
struct twl4030_codec *codec = platform_get_drvdata(twl4030_codec_dev);
return codec->audio_mclk;
}
EXPORT_SYMBOL_GPL(twl4030_codec_get_mclk);
static int __devinit twl4030_codec_probe(struct platform_device *pdev)
{
struct twl4030_codec *codec;
struct twl4030_codec_data *pdata = pdev->dev.platform_data;
struct mfd_cell *cell = NULL;
int ret, childs = 0;
u8 val;
if (!pdata) {
dev_err(&pdev->dev, "Platform data is missing\n");
return -EINVAL;
}
/* Configure APLL_INFREQ and disable APLL if enabled */
val = 0;
switch (pdata->audio_mclk) {
case 19200000:
val |= TWL4030_APLL_INFREQ_19200KHZ;
break;
case 26000000:
val |= TWL4030_APLL_INFREQ_26000KHZ;
break;
case 38400000:
val |= TWL4030_APLL_INFREQ_38400KHZ;
break;
default:
dev_err(&pdev->dev, "Invalid audio_mclk\n");
return -EINVAL;
}
twl_i2c_write_u8(TWL4030_MODULE_AUDIO_VOICE,
val, TWL4030_REG_APLL_CTL);
codec = kzalloc(sizeof(struct twl4030_codec), GFP_KERNEL);
if (!codec)
return -ENOMEM;
platform_set_drvdata(pdev, codec);
twl4030_codec_dev = pdev;
mutex_init(&codec->mutex);
codec->audio_mclk = pdata->audio_mclk;
/* Codec power */
codec->resource[TWL4030_CODEC_RES_POWER].reg = TWL4030_REG_CODEC_MODE;
codec->resource[TWL4030_CODEC_RES_POWER].mask = TWL4030_CODECPDZ;
/* PLL */
codec->resource[TWL4030_CODEC_RES_APLL].reg = TWL4030_REG_APLL_CTL;
codec->resource[TWL4030_CODEC_RES_APLL].mask = TWL4030_APLL_EN;
if (pdata->audio) {
cell = &codec->cells[childs];
cell->name = "twl4030-codec";
cell->platform_data = pdata->audio;
cell->data_size = sizeof(*pdata->audio);
childs++;
}
if (pdata->vibra) {
cell = &codec->cells[childs];
cell->name = "twl4030-vibra";
cell->platform_data = pdata->vibra;
cell->data_size = sizeof(*pdata->vibra);
childs++;
}
if (childs)
ret = mfd_add_devices(&pdev->dev, pdev->id, codec->cells,
childs, NULL, 0);
else {
dev_err(&pdev->dev, "No platform data found for childs\n");
ret = -ENODEV;
}
if (!ret)
return 0;
platform_set_drvdata(pdev, NULL);
kfree(codec);
twl4030_codec_dev = NULL;
return ret;
}
static int __devexit twl4030_codec_remove(struct platform_device *pdev)
{
struct twl4030_codec *codec = platform_get_drvdata(pdev);
mfd_remove_devices(&pdev->dev);
platform_set_drvdata(pdev, NULL);
kfree(codec);
twl4030_codec_dev = NULL;
return 0;
}
MODULE_ALIAS("platform:twl4030-audio");
static struct platform_driver twl4030_codec_driver = {
.probe = twl4030_codec_probe,
.remove = __devexit_p(twl4030_codec_remove),
.driver = {
.owner = THIS_MODULE,
.name = "twl4030-audio",
},
};
static int __devinit twl4030_codec_init(void)
{
return platform_driver_register(&twl4030_codec_driver);
}
module_init(twl4030_codec_init);
static void __devexit twl4030_codec_exit(void)
{
platform_driver_unregister(&twl4030_codec_driver);
}
module_exit(twl4030_codec_exit);
MODULE_AUTHOR("Peter Ujfalusi <peter.ujfalusi@nokia.com>");
MODULE_LICENSE("GPL");