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linux/sound/soc/nuc900/nuc900-pcm.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

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/*
* Copyright (c) 2010 Nuvoton technology corporation.
*
* Wan ZongShun <mcuos.com@gmail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation;version 2 of the License.
*
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/io.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/dma-mapping.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <mach/hardware.h>
#include "nuc900-audio.h"
static const struct snd_pcm_hardware nuc900_pcm_hardware = {
.info = SNDRV_PCM_INFO_INTERLEAVED |
SNDRV_PCM_INFO_BLOCK_TRANSFER |
SNDRV_PCM_INFO_MMAP |
SNDRV_PCM_INFO_MMAP_VALID |
SNDRV_PCM_INFO_PAUSE |
SNDRV_PCM_INFO_RESUME,
.formats = SNDRV_PCM_FMTBIT_S16_LE,
.channels_min = 1,
.channels_max = 2,
.buffer_bytes_max = 4*1024,
.period_bytes_min = 1*1024,
.period_bytes_max = 4*1024,
.periods_min = 1,
.periods_max = 1024,
};
static int nuc900_dma_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct nuc900_audio *nuc900_audio = runtime->private_data;
unsigned long flags;
int ret = 0;
spin_lock_irqsave(&nuc900_audio->lock, flags);
ret = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params));
if (ret < 0)
return ret;
nuc900_audio->substream = substream;
nuc900_audio->dma_addr[substream->stream] = runtime->dma_addr;
nuc900_audio->buffersize[substream->stream] =
params_buffer_bytes(params);
spin_unlock_irqrestore(&nuc900_audio->lock, flags);
return ret;
}
static void nuc900_update_dma_register(struct snd_pcm_substream *substream,
dma_addr_t dma_addr, size_t count)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct nuc900_audio *nuc900_audio = runtime->private_data;
void __iomem *mmio_addr, *mmio_len;
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
mmio_addr = nuc900_audio->mmio + ACTL_PDSTB;
mmio_len = nuc900_audio->mmio + ACTL_PDST_LENGTH;
} else {
mmio_addr = nuc900_audio->mmio + ACTL_RDSTB;
mmio_len = nuc900_audio->mmio + ACTL_RDST_LENGTH;
}
AUDIO_WRITE(mmio_addr, dma_addr);
AUDIO_WRITE(mmio_len, count);
}
static void nuc900_dma_start(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct nuc900_audio *nuc900_audio = runtime->private_data;
unsigned long val;
val = AUDIO_READ(nuc900_audio->mmio + ACTL_CON);
val |= (T_DMA_IRQ | R_DMA_IRQ);
AUDIO_WRITE(nuc900_audio->mmio + ACTL_CON, val);
}
static void nuc900_dma_stop(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct nuc900_audio *nuc900_audio = runtime->private_data;
unsigned long val;
val = AUDIO_READ(nuc900_audio->mmio + ACTL_CON);
val &= ~(T_DMA_IRQ | R_DMA_IRQ);
AUDIO_WRITE(nuc900_audio->mmio + ACTL_CON, val);
}
static irqreturn_t nuc900_dma_interrupt(int irq, void *dev_id)
{
struct snd_pcm_substream *substream = dev_id;
struct nuc900_audio *nuc900_audio = substream->runtime->private_data;
unsigned long val;
spin_lock(&nuc900_audio->lock);
val = AUDIO_READ(nuc900_audio->mmio + ACTL_CON);
if (val & R_DMA_IRQ) {
AUDIO_WRITE(nuc900_audio->mmio + ACTL_CON, val | R_DMA_IRQ);
val = AUDIO_READ(nuc900_audio->mmio + ACTL_RSR);
if (val & R_DMA_MIDDLE_IRQ) {
val |= R_DMA_MIDDLE_IRQ;
AUDIO_WRITE(nuc900_audio->mmio + ACTL_RSR, val);
}
if (val & R_DMA_END_IRQ) {
val |= R_DMA_END_IRQ;
AUDIO_WRITE(nuc900_audio->mmio + ACTL_RSR, val);
}
} else if (val & T_DMA_IRQ) {
AUDIO_WRITE(nuc900_audio->mmio + ACTL_CON, val | T_DMA_IRQ);
val = AUDIO_READ(nuc900_audio->mmio + ACTL_PSR);
if (val & P_DMA_MIDDLE_IRQ) {
val |= P_DMA_MIDDLE_IRQ;
AUDIO_WRITE(nuc900_audio->mmio + ACTL_PSR, val);
}
if (val & P_DMA_END_IRQ) {
val |= P_DMA_END_IRQ;
AUDIO_WRITE(nuc900_audio->mmio + ACTL_PSR, val);
}
} else {
dev_err(nuc900_audio->dev, "Wrong DMA interrupt status!\n");
spin_unlock(&nuc900_audio->lock);
return IRQ_HANDLED;
}
spin_unlock(&nuc900_audio->lock);
snd_pcm_period_elapsed(substream);
return IRQ_HANDLED;
}
static int nuc900_dma_hw_free(struct snd_pcm_substream *substream)
{
snd_pcm_lib_free_pages(substream);
return 0;
}
static int nuc900_dma_prepare(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct nuc900_audio *nuc900_audio = runtime->private_data;
unsigned long flags, val;
spin_lock_irqsave(&nuc900_audio->lock, flags);
nuc900_update_dma_register(substream,
nuc900_audio->dma_addr[substream->stream],
nuc900_audio->buffersize[substream->stream]);
val = AUDIO_READ(nuc900_audio->mmio + ACTL_RESET);
switch (runtime->channels) {
case 1:
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
val &= ~(PLAY_LEFT_CHNNEL | PLAY_RIGHT_CHNNEL);
val |= PLAY_RIGHT_CHNNEL;
} else {
val &= ~(RECORD_LEFT_CHNNEL | RECORD_RIGHT_CHNNEL);
val |= RECORD_RIGHT_CHNNEL;
}
AUDIO_WRITE(nuc900_audio->mmio + ACTL_RESET, val);
break;
case 2:
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
val |= (PLAY_LEFT_CHNNEL | PLAY_RIGHT_CHNNEL);
else
val |= (RECORD_LEFT_CHNNEL | RECORD_RIGHT_CHNNEL);
AUDIO_WRITE(nuc900_audio->mmio + ACTL_RESET, val);
break;
default:
return -EINVAL;
}
spin_unlock_irqrestore(&nuc900_audio->lock, flags);
return 0;
}
static int nuc900_dma_trigger(struct snd_pcm_substream *substream, int cmd)
{
int ret = 0;
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
case SNDRV_PCM_TRIGGER_RESUME:
nuc900_dma_start(substream);
break;
case SNDRV_PCM_TRIGGER_STOP:
case SNDRV_PCM_TRIGGER_SUSPEND:
nuc900_dma_stop(substream);
break;
default:
ret = -EINVAL;
break;
}
return ret;
}
int nuc900_dma_getposition(struct snd_pcm_substream *substream,
dma_addr_t *src, dma_addr_t *dst)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct nuc900_audio *nuc900_audio = runtime->private_data;
if (src != NULL)
*src = AUDIO_READ(nuc900_audio->mmio + ACTL_PDSTC);
if (dst != NULL)
*dst = AUDIO_READ(nuc900_audio->mmio + ACTL_RDSTC);
return 0;
}
static snd_pcm_uframes_t nuc900_dma_pointer(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
dma_addr_t src, dst;
unsigned long res;
nuc900_dma_getposition(substream, &src, &dst);
if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
res = dst - runtime->dma_addr;
else
res = src - runtime->dma_addr;
return bytes_to_frames(substream->runtime, res);
}
static int nuc900_dma_open(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct nuc900_audio *nuc900_audio;
snd_soc_set_runtime_hwparams(substream, &nuc900_pcm_hardware);
nuc900_audio = nuc900_ac97_data;
if (request_irq(nuc900_audio->irq_num, nuc900_dma_interrupt,
IRQF_DISABLED, "nuc900-dma", substream))
return -EBUSY;
runtime->private_data = nuc900_audio;
return 0;
}
static int nuc900_dma_close(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct nuc900_audio *nuc900_audio = runtime->private_data;
free_irq(nuc900_audio->irq_num, substream);
return 0;
}
static int nuc900_dma_mmap(struct snd_pcm_substream *substream,
struct vm_area_struct *vma)
{
struct snd_pcm_runtime *runtime = substream->runtime;
return dma_mmap_writecombine(substream->pcm->card->dev, vma,
runtime->dma_area,
runtime->dma_addr,
runtime->dma_bytes);
}
static struct snd_pcm_ops nuc900_dma_ops = {
.open = nuc900_dma_open,
.close = nuc900_dma_close,
.ioctl = snd_pcm_lib_ioctl,
.hw_params = nuc900_dma_hw_params,
.hw_free = nuc900_dma_hw_free,
.prepare = nuc900_dma_prepare,
.trigger = nuc900_dma_trigger,
.pointer = nuc900_dma_pointer,
.mmap = nuc900_dma_mmap,
};
static void nuc900_dma_free_dma_buffers(struct snd_pcm *pcm)
{
snd_pcm_lib_preallocate_free_for_all(pcm);
}
static u64 nuc900_pcm_dmamask = DMA_BIT_MASK(32);
static int nuc900_dma_new(struct snd_card *card,
struct snd_soc_dai *dai, struct snd_pcm *pcm)
{
if (!card->dev->dma_mask)
card->dev->dma_mask = &nuc900_pcm_dmamask;
if (!card->dev->coherent_dma_mask)
card->dev->coherent_dma_mask = DMA_BIT_MASK(32);
snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
card->dev, 4 * 1024, (4 * 1024) - 1);
return 0;
}
static struct snd_soc_platform_driver nuc900_soc_platform = {
.ops = &nuc900_dma_ops,
.pcm_new = nuc900_dma_new,
.pcm_free = nuc900_dma_free_dma_buffers,
}
static int __devinit nuc900_soc_platform_probe(struct platform_device *pdev)
{
return snd_soc_register_platform(&pdev->dev, &nuc900_soc_platform);
}
static int __devexit nuc900_soc_platform_remove(struct platform_device *pdev)
{
snd_soc_unregister_platform(&pdev->dev);
return 0;
}
static struct platform_driver nuc900_pcm_driver = {
.driver = {
.name = "nuc900-pcm-audio",
.owner = THIS_MODULE,
},
.probe = nuc900_soc_platform_probe,
.remove = __devexit_p(nuc900_soc_platform_remove),
};
static int __init nuc900_pcm_init(void)
{
return platform_driver_register(&nuc900_pcm_driver);
}
module_init(nuc900_pcm_init);
static void __exit nuc900_pcm_exit(void)
{
platform_driver_unregister(&nuc900_pcm_driver);
}
module_exit(nuc900_pcm_exit);
MODULE_AUTHOR("Wan ZongShun, <mcuos.com@gmail.com>");
MODULE_DESCRIPTION("nuc900 Audio DMA module");
MODULE_LICENSE("GPL");
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