linux/sound/soc/txx9/txx9aclc.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

454 lines
13 KiB
C

/*
* Generic TXx9 ACLC platform driver
*
* Copyright (C) 2009 Atsushi Nemoto
*
* Based on RBTX49xx patch from CELF patch archive.
* (C) Copyright TOSHIBA CORPORATION 2004-2006
*
* 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.
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/scatterlist.h>
#include <linux/slab.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include "txx9aclc.h"
static struct txx9aclc_soc_device {
struct txx9aclc_dmadata dmadata[2];
} txx9aclc_soc_device;
/* REVISIT: How to find txx9aclc_drvdata from snd_ac97? */
static struct txx9aclc_plat_drvdata *txx9aclc_drvdata;
static int txx9aclc_dma_init(struct txx9aclc_soc_device *dev,
struct txx9aclc_dmadata *dmadata);
static const struct snd_pcm_hardware txx9aclc_pcm_hardware = {
/*
* REVISIT: SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID
* needs more works for noncoherent MIPS.
*/
.info = SNDRV_PCM_INFO_INTERLEAVED |
SNDRV_PCM_INFO_BATCH |
SNDRV_PCM_INFO_PAUSE,
#ifdef __BIG_ENDIAN
.formats = SNDRV_PCM_FMTBIT_S16_BE,
#else
.formats = SNDRV_PCM_FMTBIT_S16_LE,
#endif
.period_bytes_min = 1024,
.period_bytes_max = 8 * 1024,
.periods_min = 2,
.periods_max = 4096,
.buffer_bytes_max = 32 * 1024,
};
static int txx9aclc_pcm_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
struct snd_soc_pcm_runtime *rtd = snd_pcm_substream_chip(substream);
struct snd_pcm_runtime *runtime = substream->runtime;
struct txx9aclc_dmadata *dmadata = runtime->private_data;
int ret;
ret = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params));
if (ret < 0)
return ret;
dev_dbg(rtd->platform->dev,
"runtime->dma_area = %#lx dma_addr = %#lx dma_bytes = %zd "
"runtime->min_align %ld\n",
(unsigned long)runtime->dma_area,
(unsigned long)runtime->dma_addr, runtime->dma_bytes,
runtime->min_align);
dev_dbg(rtd->platform->dev,
"periods %d period_bytes %d stream %d\n",
params_periods(params), params_period_bytes(params),
substream->stream);
dmadata->substream = substream;
dmadata->pos = 0;
return 0;
}
static int txx9aclc_pcm_hw_free(struct snd_pcm_substream *substream)
{
return snd_pcm_lib_free_pages(substream);
}
static int txx9aclc_pcm_prepare(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct txx9aclc_dmadata *dmadata = runtime->private_data;
dmadata->dma_addr = runtime->dma_addr;
dmadata->buffer_bytes = snd_pcm_lib_buffer_bytes(substream);
dmadata->period_bytes = snd_pcm_lib_period_bytes(substream);
if (dmadata->buffer_bytes == dmadata->period_bytes) {
dmadata->frag_bytes = dmadata->period_bytes >> 1;
dmadata->frags = 2;
} else {
dmadata->frag_bytes = dmadata->period_bytes;
dmadata->frags = dmadata->buffer_bytes / dmadata->period_bytes;
}
dmadata->frag_count = 0;
dmadata->pos = 0;
return 0;
}
static void txx9aclc_dma_complete(void *arg)
{
struct txx9aclc_dmadata *dmadata = arg;
unsigned long flags;
/* dma completion handler cannot submit new operations */
spin_lock_irqsave(&dmadata->dma_lock, flags);
if (dmadata->frag_count >= 0) {
dmadata->dmacount--;
BUG_ON(dmadata->dmacount < 0);
tasklet_schedule(&dmadata->tasklet);
}
spin_unlock_irqrestore(&dmadata->dma_lock, flags);
}
static struct dma_async_tx_descriptor *
txx9aclc_dma_submit(struct txx9aclc_dmadata *dmadata, dma_addr_t buf_dma_addr)
{
struct dma_chan *chan = dmadata->dma_chan;
struct dma_async_tx_descriptor *desc;
struct scatterlist sg;
sg_init_table(&sg, 1);
sg_set_page(&sg, pfn_to_page(PFN_DOWN(buf_dma_addr)),
dmadata->frag_bytes, buf_dma_addr & (PAGE_SIZE - 1));
sg_dma_address(&sg) = buf_dma_addr;
desc = chan->device->device_prep_slave_sg(chan, &sg, 1,
dmadata->substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
DMA_TO_DEVICE : DMA_FROM_DEVICE,
DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
if (!desc) {
dev_err(&chan->dev->device, "cannot prepare slave dma\n");
return NULL;
}
desc->callback = txx9aclc_dma_complete;
desc->callback_param = dmadata;
desc->tx_submit(desc);
return desc;
}
#define NR_DMA_CHAIN 2
static void txx9aclc_dma_tasklet(unsigned long data)
{
struct txx9aclc_dmadata *dmadata = (struct txx9aclc_dmadata *)data;
struct dma_chan *chan = dmadata->dma_chan;
struct dma_async_tx_descriptor *desc;
struct snd_pcm_substream *substream = dmadata->substream;
u32 ctlbit = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
ACCTL_AUDODMA : ACCTL_AUDIDMA;
int i;
unsigned long flags;
spin_lock_irqsave(&dmadata->dma_lock, flags);
if (dmadata->frag_count < 0) {
struct txx9aclc_plat_drvdata *drvdata = txx9aclc_drvdata;
void __iomem *base = drvdata->base;
spin_unlock_irqrestore(&dmadata->dma_lock, flags);
chan->device->device_control(chan, DMA_TERMINATE_ALL, 0);
/* first time */
for (i = 0; i < NR_DMA_CHAIN; i++) {
desc = txx9aclc_dma_submit(dmadata,
dmadata->dma_addr + i * dmadata->frag_bytes);
if (!desc)
return;
}
dmadata->dmacount = NR_DMA_CHAIN;
chan->device->device_issue_pending(chan);
spin_lock_irqsave(&dmadata->dma_lock, flags);
__raw_writel(ctlbit, base + ACCTLEN);
dmadata->frag_count = NR_DMA_CHAIN % dmadata->frags;
spin_unlock_irqrestore(&dmadata->dma_lock, flags);
return;
}
BUG_ON(dmadata->dmacount >= NR_DMA_CHAIN);
while (dmadata->dmacount < NR_DMA_CHAIN) {
dmadata->dmacount++;
spin_unlock_irqrestore(&dmadata->dma_lock, flags);
desc = txx9aclc_dma_submit(dmadata,
dmadata->dma_addr +
dmadata->frag_count * dmadata->frag_bytes);
if (!desc)
return;
chan->device->device_issue_pending(chan);
spin_lock_irqsave(&dmadata->dma_lock, flags);
dmadata->frag_count++;
dmadata->frag_count %= dmadata->frags;
dmadata->pos += dmadata->frag_bytes;
dmadata->pos %= dmadata->buffer_bytes;
if ((dmadata->frag_count * dmadata->frag_bytes) %
dmadata->period_bytes == 0)
snd_pcm_period_elapsed(substream);
}
spin_unlock_irqrestore(&dmadata->dma_lock, flags);
}
static int txx9aclc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
{
struct txx9aclc_dmadata *dmadata = substream->runtime->private_data;
struct txx9aclc_plat_drvdata *drvdata =txx9aclc_drvdata;
void __iomem *base = drvdata->base;
unsigned long flags;
int ret = 0;
u32 ctlbit = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
ACCTL_AUDODMA : ACCTL_AUDIDMA;
spin_lock_irqsave(&dmadata->dma_lock, flags);
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
dmadata->frag_count = -1;
tasklet_schedule(&dmadata->tasklet);
break;
case SNDRV_PCM_TRIGGER_STOP:
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
case SNDRV_PCM_TRIGGER_SUSPEND:
__raw_writel(ctlbit, base + ACCTLDIS);
break;
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
case SNDRV_PCM_TRIGGER_RESUME:
__raw_writel(ctlbit, base + ACCTLEN);
break;
default:
ret = -EINVAL;
}
spin_unlock_irqrestore(&dmadata->dma_lock, flags);
return ret;
}
static snd_pcm_uframes_t
txx9aclc_pcm_pointer(struct snd_pcm_substream *substream)
{
struct txx9aclc_dmadata *dmadata = substream->runtime->private_data;
return bytes_to_frames(substream->runtime, dmadata->pos);
}
static int txx9aclc_pcm_open(struct snd_pcm_substream *substream)
{
struct txx9aclc_soc_device *dev = &txx9aclc_soc_device;
struct txx9aclc_dmadata *dmadata = &dev->dmadata[substream->stream];
int ret;
ret = snd_soc_set_runtime_hwparams(substream, &txx9aclc_pcm_hardware);
if (ret)
return ret;
/* ensure that buffer size is a multiple of period size */
ret = snd_pcm_hw_constraint_integer(substream->runtime,
SNDRV_PCM_HW_PARAM_PERIODS);
if (ret < 0)
return ret;
substream->runtime->private_data = dmadata;
return 0;
}
static int txx9aclc_pcm_close(struct snd_pcm_substream *substream)
{
struct txx9aclc_dmadata *dmadata = substream->runtime->private_data;
struct dma_chan *chan = dmadata->dma_chan;
dmadata->frag_count = -1;
chan->device->device_control(chan, DMA_TERMINATE_ALL, 0);
return 0;
}
static struct snd_pcm_ops txx9aclc_pcm_ops = {
.open = txx9aclc_pcm_open,
.close = txx9aclc_pcm_close,
.ioctl = snd_pcm_lib_ioctl,
.hw_params = txx9aclc_pcm_hw_params,
.hw_free = txx9aclc_pcm_hw_free,
.prepare = txx9aclc_pcm_prepare,
.trigger = txx9aclc_pcm_trigger,
.pointer = txx9aclc_pcm_pointer,
};
static void txx9aclc_pcm_free_dma_buffers(struct snd_pcm *pcm)
{
snd_pcm_lib_preallocate_free_for_all(pcm);
}
static int txx9aclc_pcm_new(struct snd_card *card, struct snd_soc_dai *dai,
struct snd_pcm *pcm)
{
struct platform_device *pdev = to_platform_device(dai->platform->dev);
struct txx9aclc_soc_device *dev;
struct resource *r;
int i;
int ret;
/* at this point onwards the AC97 component has probed and this will be valid */
dev = snd_soc_dai_get_drvdata(dai);
dev->dmadata[0].stream = SNDRV_PCM_STREAM_PLAYBACK;
dev->dmadata[1].stream = SNDRV_PCM_STREAM_CAPTURE;
for (i = 0; i < 2; i++) {
r = platform_get_resource(pdev, IORESOURCE_DMA, i);
if (!r) {
ret = -EBUSY;
goto exit;
}
dev->dmadata[i].dma_res = r;
ret = txx9aclc_dma_init(dev, &dev->dmadata[i]);
if (ret)
goto exit;
}
return snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
card->dev, 64 * 1024, 4 * 1024 * 1024);
exit:
for (i = 0; i < 2; i++) {
if (dev->dmadata[i].dma_chan)
dma_release_channel(dev->dmadata[i].dma_chan);
dev->dmadata[i].dma_chan = NULL;
}
return ret;
}
static bool filter(struct dma_chan *chan, void *param)
{
struct txx9aclc_dmadata *dmadata = param;
char *devname;
bool found = false;
devname = kasprintf(GFP_KERNEL, "%s.%d", dmadata->dma_res->name,
(int)dmadata->dma_res->start);
if (strcmp(dev_name(chan->device->dev), devname) == 0) {
chan->private = &dmadata->dma_slave;
found = true;
}
kfree(devname);
return found;
}
static int txx9aclc_dma_init(struct txx9aclc_soc_device *dev,
struct txx9aclc_dmadata *dmadata)
{
struct txx9aclc_plat_drvdata *drvdata =txx9aclc_drvdata;
struct txx9dmac_slave *ds = &dmadata->dma_slave;
dma_cap_mask_t mask;
spin_lock_init(&dmadata->dma_lock);
ds->reg_width = sizeof(u32);
if (dmadata->stream == SNDRV_PCM_STREAM_PLAYBACK) {
ds->tx_reg = drvdata->physbase + ACAUDODAT;
ds->rx_reg = 0;
} else {
ds->tx_reg = 0;
ds->rx_reg = drvdata->physbase + ACAUDIDAT;
}
/* Try to grab a DMA channel */
dma_cap_zero(mask);
dma_cap_set(DMA_SLAVE, mask);
dmadata->dma_chan = dma_request_channel(mask, filter, dmadata);
if (!dmadata->dma_chan) {
printk(KERN_ERR
"DMA channel for %s is not available\n",
dmadata->stream == SNDRV_PCM_STREAM_PLAYBACK ?
"playback" : "capture");
return -EBUSY;
}
tasklet_init(&dmadata->tasklet, txx9aclc_dma_tasklet,
(unsigned long)dmadata);
return 0;
}
static int txx9aclc_pcm_probe(struct snd_soc_platform *platform)
{
snd_soc_platform_set_drvdata(platform, &txx9aclc_soc_device);
return 0;
}
static int txx9aclc_pcm_remove(struct snd_soc_platform *platform)
{
struct txx9aclc_soc_device *dev = snd_soc_platform_get_drvdata(platform);
struct txx9aclc_plat_drvdata *drvdata = txx9aclc_drvdata;
void __iomem *base = drvdata->base;
int i;
/* disable all FIFO DMAs */
__raw_writel(ACCTL_AUDODMA | ACCTL_AUDIDMA, base + ACCTLDIS);
/* dummy R/W to clear pending DMAREQ if any */
__raw_writel(__raw_readl(base + ACAUDIDAT), base + ACAUDODAT);
for (i = 0; i < 2; i++) {
struct txx9aclc_dmadata *dmadata = &dev->dmadata[i];
struct dma_chan *chan = dmadata->dma_chan;
if (chan) {
dmadata->frag_count = -1;
chan->device->device_control(chan,
DMA_TERMINATE_ALL, 0);
dma_release_channel(chan);
}
dev->dmadata[i].dma_chan = NULL;
}
return 0;
}
static struct snd_soc_platform_driver txx9aclc_soc_platform = {
.probe = txx9aclc_pcm_probe,
.remove = txx9aclc_pcm_remove,
.ops = &txx9aclc_pcm_ops,
.pcm_new = txx9aclc_pcm_new,
.pcm_free = txx9aclc_pcm_free_dma_buffers,
};
static int __devinit txx9aclc_soc_platform_probe(struct platform_device *pdev)
{
return snd_soc_register_platform(&pdev->dev, &txx9aclc_soc_platform);
}
static int __devexit txx9aclc_soc_platform_remove(struct platform_device *pdev)
{
snd_soc_unregister_platform(&pdev->dev);
return 0;
}
static struct platform_driver txx9aclc_pcm_driver = {
.driver = {
.name = "txx9aclc-pcm-audio",
.owner = THIS_MODULE,
},
.probe = txx9aclc_soc_platform_probe,
.remove = __devexit_p(txx9aclc_soc_platform_remove),
};
static int __init snd_txx9aclc_pcm_init(void)
{
return platform_driver_register(&txx9aclc_pcm_driver);
}
module_init(snd_txx9aclc_pcm_init);
static void __exit snd_txx9aclc_pcm_exit(void)
{
platform_driver_unregister(&txx9aclc_pcm_driver);
}
module_exit(snd_txx9aclc_pcm_exit);
MODULE_AUTHOR("Atsushi Nemoto <anemo@mba.ocn.ne.jp>");
MODULE_DESCRIPTION("TXx9 ACLC Audio DMA driver");
MODULE_LICENSE("GPL");