[linux-2.6-block.git] / sound / soc / blackfin / bf5xx-ac97-pcm.c

/*
 * File:         sound/soc/blackfin/bf5xx-ac97-pcm.c
 * Author:       Cliff Cai <Cliff.Cai@analog.com>
 *
 * Created:      Tue June 06 2008
 * Description:  DMA Driver for AC97 sound chip
 *
 * Modified:
 *               Copyright 2008 Analog Devices Inc.
 *
 * Bugs:         Enter bugs at http://blackfin.uclinux.org/
 *
 * 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; either version 2 of the License, or
 * (at your option) any later version.
 *
 * 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, see the file COPYING, or write
 * to the Free Software Foundation, Inc.,
 * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */

#include <linux/module.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/dma-mapping.h>
#include <linux/gfp.h>

#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>

#include <asm/dma.h>

#include "bf5xx-ac97-pcm.h"
#include "bf5xx-ac97.h"
#include "bf5xx-sport.h"

static unsigned int ac97_chan_mask[] = {
	SP_FL, /* Mono */
	SP_STEREO, /* Stereo */
	SP_2DOT1, /* 2.1*/
	SP_QUAD,/*Quadraquic*/
	SP_FL | SP_FR | SP_FC | SP_SL | SP_SR,/*5 channels */
	SP_5DOT1, /* 5.1 */
};

#if defined(CONFIG_SND_BF5XX_MMAP_SUPPORT)
static void bf5xx_mmap_copy(struct snd_pcm_substream *substream,
	 snd_pcm_uframes_t count)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct sport_device *sport = runtime->private_data;
	unsigned int chan_mask = ac97_chan_mask[runtime->channels - 1];
	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
		bf5xx_pcm_to_ac97((struct ac97_frame *)sport->tx_dma_buf +
		sport->tx_pos, (__u16 *)runtime->dma_area + sport->tx_pos *
		runtime->channels, count, chan_mask);
		sport->tx_pos += runtime->period_size;
		if (sport->tx_pos >= runtime->buffer_size)
			sport->tx_pos %= runtime->buffer_size;
		sport->tx_delay_pos = sport->tx_pos;
	} else {
		bf5xx_ac97_to_pcm((struct ac97_frame *)sport->rx_dma_buf +
		sport->rx_pos, (__u16 *)runtime->dma_area + sport->rx_pos *
		runtime->channels, count);
		sport->rx_pos += runtime->period_size;
		if (sport->rx_pos >= runtime->buffer_size)
			sport->rx_pos %= runtime->buffer_size;
	}
}
#endif

static void bf5xx_dma_irq(void *data)
{
	struct snd_pcm_substream *pcm = data;
#if defined(CONFIG_SND_BF5XX_MMAP_SUPPORT)
	struct snd_pcm_runtime *runtime = pcm->runtime;
	struct sport_device *sport = runtime->private_data;
	bf5xx_mmap_copy(pcm, runtime->period_size);
	if (pcm->stream == SNDRV_PCM_STREAM_PLAYBACK) {
		if (sport->once == 0) {
			snd_pcm_period_elapsed(pcm);
			bf5xx_mmap_copy(pcm, runtime->period_size);
			sport->once = 1;
		}
	}
#endif
	snd_pcm_period_elapsed(pcm);
}

/* The memory size for pure pcm data is 128*1024 = 0x20000 bytes.
 * The total rx/tx buffer is for ac97 frame to hold all pcm data
 * is  0x20000 * sizeof(struct ac97_frame) / 4.
 */
static const struct snd_pcm_hardware bf5xx_pcm_hardware = {
	.info			= SNDRV_PCM_INFO_INTERLEAVED |
#if defined(CONFIG_SND_BF5XX_MMAP_SUPPORT)
				   SNDRV_PCM_INFO_MMAP |
				   SNDRV_PCM_INFO_MMAP_VALID |
#endif
				   SNDRV_PCM_INFO_BLOCK_TRANSFER,

	.formats		= SNDRV_PCM_FMTBIT_S16_LE,
	.period_bytes_min	= 32,
	.period_bytes_max	= 0x10000,
	.periods_min		= 1,
	.periods_max		= PAGE_SIZE/32,
	.buffer_bytes_max	= 0x20000, /* 128 kbytes */
	.fifo_size		= 16,
};

static int bf5xx_pcm_hw_params(struct snd_pcm_substream *substream,
	struct snd_pcm_hw_params *params)
{
	size_t size = bf5xx_pcm_hardware.buffer_bytes_max
			* sizeof(struct ac97_frame) / 4;

	snd_pcm_lib_malloc_pages(substream, size);

	return 0;
}

static int bf5xx_pcm_hw_free(struct snd_pcm_substream *substream)
{
#if defined(CONFIG_SND_BF5XX_MMAP_SUPPORT)
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct sport_device *sport = runtime->private_data;

	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
		sport->once = 0;
		if (runtime->dma_area)
			memset(runtime->dma_area, 0, runtime->buffer_size);
		memset(sport->tx_dma_buf, 0, runtime->buffer_size *
			sizeof(struct ac97_frame));
	} else
		memset(sport->rx_dma_buf, 0, runtime->buffer_size *
			sizeof(struct ac97_frame));
#endif
	snd_pcm_lib_free_pages(substream);
	return 0;
}

static int bf5xx_pcm_prepare(struct snd_pcm_substream *substream)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct sport_device *sport = runtime->private_data;

	/* An intermediate buffer is introduced for implementing mmap for
	 * SPORT working in TMD mode(include AC97).
	 */
#if defined(CONFIG_SND_BF5XX_MMAP_SUPPORT)
	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
		sport_set_tx_callback(sport, bf5xx_dma_irq, substream);
		sport_config_tx_dma(sport, sport->tx_dma_buf, runtime->periods,
			runtime->period_size * sizeof(struct ac97_frame));
	} else {
		sport_set_rx_callback(sport, bf5xx_dma_irq, substream);
		sport_config_rx_dma(sport, sport->rx_dma_buf, runtime->periods,
			runtime->period_size * sizeof(struct ac97_frame));
	}
#else
	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
		sport_set_tx_callback(sport, bf5xx_dma_irq, substream);
		sport_config_tx_dma(sport, runtime->dma_area, runtime->periods,
			runtime->period_size * sizeof(struct ac97_frame));
	} else {
		sport_set_rx_callback(sport, bf5xx_dma_irq, substream);
		sport_config_rx_dma(sport, runtime->dma_area, runtime->periods,
			runtime->period_size * sizeof(struct ac97_frame));
	}
#endif
	return 0;
}

static int bf5xx_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct sport_device *sport = runtime->private_data;
	int ret = 0;

	pr_debug("%s enter\n", __func__);
	switch (cmd) {
	case SNDRV_PCM_TRIGGER_START:
		if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
#if defined(CONFIG_SND_BF5XX_MMAP_SUPPORT)
			bf5xx_mmap_copy(substream, runtime->period_size);
			sport->tx_delay_pos = 0;
#endif
			sport_tx_start(sport);
		} else
			sport_rx_start(sport);
		break;
	case SNDRV_PCM_TRIGGER_STOP:
	case SNDRV_PCM_TRIGGER_SUSPEND:
	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
		if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
#if defined(CONFIG_SND_BF5XX_MMAP_SUPPORT)
			sport->tx_pos = 0;
#endif
			sport_tx_stop(sport);
		} else {
#if defined(CONFIG_SND_BF5XX_MMAP_SUPPORT)
			sport->rx_pos = 0;
#endif
			sport_rx_stop(sport);
		}
		break;
	default:
		ret = -EINVAL;
	}
	return ret;
}

static snd_pcm_uframes_t bf5xx_pcm_pointer(struct snd_pcm_substream *substream)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct sport_device *sport = runtime->private_data;
	unsigned int curr;

#if defined(CONFIG_SND_BF5XX_MMAP_SUPPORT)
	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
		curr = sport->tx_delay_pos;
	else
		curr = sport->rx_pos;
#else

	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
		curr = sport_curr_offset_tx(sport) / sizeof(struct ac97_frame);
	else
		curr = sport_curr_offset_rx(sport) / sizeof(struct ac97_frame);

#endif
	return curr;
}

static int bf5xx_pcm_open(struct snd_pcm_substream *substream)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	int ret;

	pr_debug("%s enter\n", __func__);
	snd_soc_set_runtime_hwparams(substream, &bf5xx_pcm_hardware);

	ret = snd_pcm_hw_constraint_integer(runtime,
					    SNDRV_PCM_HW_PARAM_PERIODS);
	if (ret < 0)
		goto out;

	if (sport_handle != NULL)
		runtime->private_data = sport_handle;
	else {
		pr_err("sport_handle is NULL\n");
		return -1;
	}
	return 0;

 out:
	return ret;
}

#if defined(CONFIG_SND_BF5XX_MMAP_SUPPORT)
static int bf5xx_pcm_mmap(struct snd_pcm_substream *substream,
	struct vm_area_struct *vma)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	size_t size = vma->vm_end - vma->vm_start;
	vma->vm_start = (unsigned long)runtime->dma_area;
	vma->vm_end = vma->vm_start + size;
	vma->vm_flags |=  VM_SHARED;
	return 0 ;
}
#else
static	int bf5xx_pcm_copy(struct snd_pcm_substream *substream, int channel,
		    snd_pcm_uframes_t pos,
		    void __user *buf, snd_pcm_uframes_t count)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	unsigned int chan_mask = ac97_chan_mask[runtime->channels - 1];
	pr_debug("%s copy pos:0x%lx count:0x%lx\n",
			substream->stream ? "Capture" : "Playback", pos, count);

	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
		bf5xx_pcm_to_ac97((struct ac97_frame *)runtime->dma_area + pos,
			(__u16 *)buf, count, chan_mask);
	else
		bf5xx_ac97_to_pcm((struct ac97_frame *)runtime->dma_area + pos,
			(__u16 *)buf, count);
	return 0;
}
#endif

static struct snd_pcm_ops bf5xx_pcm_ac97_ops = {
	.open		= bf5xx_pcm_open,
	.ioctl		= snd_pcm_lib_ioctl,
	.hw_params	= bf5xx_pcm_hw_params,
	.hw_free	= bf5xx_pcm_hw_free,
	.prepare	= bf5xx_pcm_prepare,
	.trigger	= bf5xx_pcm_trigger,
	.pointer	= bf5xx_pcm_pointer,
#if defined(CONFIG_SND_BF5XX_MMAP_SUPPORT)
	.mmap		= bf5xx_pcm_mmap,
#else
	.copy		= bf5xx_pcm_copy,
#endif
};

static int bf5xx_pcm_preallocate_dma_buffer(struct snd_pcm *pcm, int stream)
{
	struct snd_pcm_substream *substream = pcm->streams[stream].substream;
	struct snd_dma_buffer *buf = &substream->dma_buffer;
	size_t size = bf5xx_pcm_hardware.buffer_bytes_max
			* sizeof(struct ac97_frame) / 4;

	buf->dev.type = SNDRV_DMA_TYPE_DEV;
	buf->dev.dev = pcm->card->dev;
	buf->private_data = NULL;
	buf->area = dma_alloc_coherent(pcm->card->dev, size,
			&buf->addr, GFP_KERNEL);
	if (!buf->area) {
		pr_err("Failed to allocate dma memory\n");
		pr_err("Please increase uncached DMA memory region\n");
		return -ENOMEM;
	}
	buf->bytes = size;

	pr_debug("%s, area:%p, size:0x%08lx\n", __func__,
			buf->area, buf->bytes);

	if (stream == SNDRV_PCM_STREAM_PLAYBACK)
		sport_handle->tx_buf = buf->area;
	else
		sport_handle->rx_buf = buf->area;

/*
 * Need to allocate local buffer when enable
 * MMAP for SPORT working in TMD mode (include AC97).
 */
#if defined(CONFIG_SND_BF5XX_MMAP_SUPPORT)
	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
		if (!sport_handle->tx_dma_buf) {
			sport_handle->tx_dma_buf = dma_alloc_coherent(NULL, \
				size, &sport_handle->tx_dma_phy, GFP_KERNEL);
			if (!sport_handle->tx_dma_buf) {
				pr_err("Failed to allocate memory for tx dma buf - Please increase uncached DMA memory region\n");
				return -ENOMEM;
			} else
				memset(sport_handle->tx_dma_buf, 0, size);
		} else
			memset(sport_handle->tx_dma_buf, 0, size);
	} else {
		if (!sport_handle->rx_dma_buf) {
			sport_handle->rx_dma_buf = dma_alloc_coherent(NULL, \
				size, &sport_handle->rx_dma_phy, GFP_KERNEL);
			if (!sport_handle->rx_dma_buf) {
				pr_err("Failed to allocate memory for rx dma buf - Please increase uncached DMA memory region\n");
				return -ENOMEM;
			} else
				memset(sport_handle->rx_dma_buf, 0, size);
		} else
			memset(sport_handle->rx_dma_buf, 0, size);
	}
#endif
	return 0;
}

static void bf5xx_pcm_free_dma_buffers(struct snd_pcm *pcm)
{
	struct snd_pcm_substream *substream;
	struct snd_dma_buffer *buf;
	int stream;
#if defined(CONFIG_SND_BF5XX_MMAP_SUPPORT)
	size_t size = bf5xx_pcm_hardware.buffer_bytes_max *
		sizeof(struct ac97_frame) / 4;
#endif
	for (stream = 0; stream < 2; stream++) {
		substream = pcm->streams[stream].substream;
		if (!substream)
			continue;

		buf = &substream->dma_buffer;
		if (!buf->area)
			continue;
		dma_free_coherent(NULL, buf->bytes, buf->area, 0);
		buf->area = NULL;
#if defined(CONFIG_SND_BF5XX_MMAP_SUPPORT)
	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
		if (sport_handle->tx_dma_buf)
			dma_free_coherent(NULL, size, \
				sport_handle->tx_dma_buf, 0);
		sport_handle->tx_dma_buf = NULL;
	} else {

		if (sport_handle->rx_dma_buf)
			dma_free_coherent(NULL, size, \
				sport_handle->rx_dma_buf, 0);
		sport_handle->rx_dma_buf = NULL;
	}
#endif
	}
	if (sport_handle)
		sport_done(sport_handle);
}

static u64 bf5xx_pcm_dmamask = DMA_BIT_MASK(32);

int bf5xx_pcm_ac97_new(struct snd_card *card, struct snd_soc_dai *dai,
	struct snd_pcm *pcm)
{
	int ret = 0;

	pr_debug("%s enter\n", __func__);
	if (!card->dev->dma_mask)
		card->dev->dma_mask = &bf5xx_pcm_dmamask;
	if (!card->dev->coherent_dma_mask)
		card->dev->coherent_dma_mask = DMA_BIT_MASK(32);

	if (dai->playback.channels_min) {
		ret = bf5xx_pcm_preallocate_dma_buffer(pcm,
			SNDRV_PCM_STREAM_PLAYBACK);
		if (ret)
			goto out;
	}

	if (dai->capture.channels_min) {
		ret = bf5xx_pcm_preallocate_dma_buffer(pcm,
			SNDRV_PCM_STREAM_CAPTURE);
		if (ret)
			goto out;
	}
 out:
	return ret;
}

struct snd_soc_platform bf5xx_ac97_soc_platform = {
	.name		= "bf5xx-audio",
	.pcm_ops 	= &bf5xx_pcm_ac97_ops,
	.pcm_new	= bf5xx_pcm_ac97_new,
	.pcm_free	= bf5xx_pcm_free_dma_buffers,
};
EXPORT_SYMBOL_GPL(bf5xx_ac97_soc_platform);

static int __init bfin_ac97_init(void)
{
	return snd_soc_register_platform(&bf5xx_ac97_soc_platform);
}
module_init(bfin_ac97_init);

static void __exit bfin_ac97_exit(void)
{
	snd_soc_unregister_platform(&bf5xx_ac97_soc_platform);
}
module_exit(bfin_ac97_exit);

MODULE_AUTHOR("Cliff Cai");
MODULE_DESCRIPTION("ADI Blackfin AC97 PCM DMA module");
MODULE_LICENSE("GPL");
Commit	Line	Data
aff0510c CC	1	/*
	2	* File: sound/soc/blackfin/bf5xx-ac97-pcm.c
	3	* Author: Cliff Cai <Cliff.Cai@analog.com>
	4	*
	5	* Created: Tue June 06 2008
	6	* Description: DMA Driver for AC97 sound chip
	7	*
	8	* Modified:
	9	* Copyright 2008 Analog Devices Inc.
	10	*
	11	* Bugs: Enter bugs at http://blackfin.uclinux.org/
	12	*
	13	* This program is free software; you can redistribute it and/or modify
	14	* it under the terms of the GNU General Public License as published by
	15	* the Free Software Foundation; either version 2 of the License, or
	16	* (at your option) any later version.
	17	*
	18	* This program is distributed in the hope that it will be useful,
	19	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	20	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	21	* GNU General Public License for more details.
	22	*
	23	* You should have received a copy of the GNU General Public License
	24	* along with this program; if not, see the file COPYING, or write
	25	* to the Free Software Foundation, Inc.,
	26	* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
	27	*/
	28
	29	#include <linux/module.h>
	30	#include <linux/init.h>
	31	#include <linux/platform_device.h>
aff0510c	32	#include <linux/dma-mapping.h>
5a0e3ad6	33	#include <linux/gfp.h>
aff0510c CC	34
	35	#include <sound/core.h>
	36	#include <sound/pcm.h>
	37	#include <sound/pcm_params.h>
	38	#include <sound/soc.h>
	39
	40	#include <asm/dma.h>
	41
	42	#include "bf5xx-ac97-pcm.h"
	43	#include "bf5xx-ac97.h"
	44	#include "bf5xx-sport.h"
	45
67f854b9 CC	46	static unsigned int ac97_chan_mask[] = {
	47	SP_FL, /* Mono */
	48	SP_STEREO, /* Stereo */
	49	SP_2DOT1, /* 2.1*/
	50	SP_QUAD,/Quadraquic/
	51	SP_FL \| SP_FR \| SP_FC \| SP_SL \| SP_SR,/5 channels /
	52	SP_5DOT1, /* 5.1 */
	53	};
	54
	55	#if defined(CONFIG_SND_BF5XX_MMAP_SUPPORT)
aff0510c CC	56	static void bf5xx_mmap_copy(struct snd_pcm_substream *substream,
	57	snd_pcm_uframes_t count)
	58	{
	59	struct snd_pcm_runtime *runtime = substream->runtime;
	60	struct sport_device *sport = runtime->private_data;
67f854b9	61	unsigned int chan_mask = ac97_chan_mask[runtime->channels - 1];
aff0510c	62	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
67f854b9 CC	63	bf5xx_pcm_to_ac97((struct ac97_frame *)sport->tx_dma_buf +
	64	sport->tx_pos, (__u16 )runtime->dma_area + sport->tx_pos
	65	runtime->channels, count, chan_mask);
aff0510c CC	66	sport->tx_pos += runtime->period_size;
	67	if (sport->tx_pos >= runtime->buffer_size)
	68	sport->tx_pos %= runtime->buffer_size;
6b58a821	69	sport->tx_delay_pos = sport->tx_pos;
aff0510c	70	} else {
67f854b9 CC	71	bf5xx_ac97_to_pcm((struct ac97_frame *)sport->rx_dma_buf +
	72	sport->rx_pos, (__u16 )runtime->dma_area + sport->rx_pos
	73	runtime->channels, count);
aff0510c CC	74	sport->rx_pos += runtime->period_size;
	75	if (sport->rx_pos >= runtime->buffer_size)
	76	sport->rx_pos %= runtime->buffer_size;
	77	}
	78	}
	79	#endif
	80
	81	static void bf5xx_dma_irq(void *data)
	82	{
	83	struct snd_pcm_substream *pcm = data;
67f854b9	84	#if defined(CONFIG_SND_BF5XX_MMAP_SUPPORT)
aff0510c	85	struct snd_pcm_runtime *runtime = pcm->runtime;
6b58a821	86	struct sport_device *sport = runtime->private_data;
aff0510c	87	bf5xx_mmap_copy(pcm, runtime->period_size);
6b58a821 CC	88	if (pcm->stream == SNDRV_PCM_STREAM_PLAYBACK) {
	89	if (sport->once == 0) {
	90	snd_pcm_period_elapsed(pcm);
	91	bf5xx_mmap_copy(pcm, runtime->period_size);
	92	sport->once = 1;
	93	}
	94	}
aff0510c CC	95	#endif
	96	snd_pcm_period_elapsed(pcm);
	97	}
	98
	99	/* The memory size for pure pcm data is 128*1024 = 0x20000 bytes.
	100	* The total rx/tx buffer is for ac97 frame to hold all pcm data
	101	* is 0x20000 * sizeof(struct ac97_frame) / 4.
	102	*/
aff0510c CC	103	static const struct snd_pcm_hardware bf5xx_pcm_hardware = {
aff0510c CC	104	.info = SNDRV_PCM_INFO_INTERLEAVED \|
27b9be5a	105	#if defined(CONFIG_SND_BF5XX_MMAP_SUPPORT)
aff0510c CC	106	SNDRV_PCM_INFO_MMAP \|
aff0510c CC	107	SNDRV_PCM_INFO_MMAP_VALID \|
aff0510c	108	#endif
27b9be5a BW	109	SNDRV_PCM_INFO_BLOCK_TRANSFER,
27b9be5a BW	110
aff0510c CC	111	.formats = SNDRV_PCM_FMTBIT_S16_LE,
	112	.period_bytes_min = 32,
	113	.period_bytes_max = 0x10000,
	114	.periods_min = 1,
	115	.periods_max = PAGE_SIZE/32,
	116	.buffer_bytes_max = 0x20000, /* 128 kbytes */
	117	.fifo_size = 16,
	118	};
	119
	120	static int bf5xx_pcm_hw_params(struct snd_pcm_substream *substream,
	121	struct snd_pcm_hw_params *params)
	122	{
	123	size_t size = bf5xx_pcm_hardware.buffer_bytes_max
	124	* sizeof(struct ac97_frame) / 4;
	125
	126	snd_pcm_lib_malloc_pages(substream, size);
	127
	128	return 0;
	129	}
	130
	131	static int bf5xx_pcm_hw_free(struct snd_pcm_substream *substream)
	132	{
67f854b9	133	#if defined(CONFIG_SND_BF5XX_MMAP_SUPPORT)
6b58a821	134	struct snd_pcm_runtime *runtime = substream->runtime;
67f854b9	135	struct sport_device *sport = runtime->private_data;
6b58a821	136
67f854b9 CC	137	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
	138	sport->once = 0;
	139	if (runtime->dma_area)
	140	memset(runtime->dma_area, 0, runtime->buffer_size);
	141	memset(sport->tx_dma_buf, 0, runtime->buffer_size *
	142	sizeof(struct ac97_frame));
	143	} else
	144	memset(sport->rx_dma_buf, 0, runtime->buffer_size *
	145	sizeof(struct ac97_frame));
	146	#endif
aff0510c CC	147	snd_pcm_lib_free_pages(substream);
	148	return 0;
	149	}
	150
	151	static int bf5xx_pcm_prepare(struct snd_pcm_substream *substream)
	152	{
	153	struct snd_pcm_runtime *runtime = substream->runtime;
	154	struct sport_device *sport = runtime->private_data;
	155
	156	/* An intermediate buffer is introduced for implementing mmap for
	157	* SPORT working in TMD mode(include AC97).
	158	*/
67f854b9	159	#if defined(CONFIG_SND_BF5XX_MMAP_SUPPORT)
aff0510c	160	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
aff0510c CC	161	sport_set_tx_callback(sport, bf5xx_dma_irq, substream);
	162	sport_config_tx_dma(sport, sport->tx_dma_buf, runtime->periods,
	163	runtime->period_size * sizeof(struct ac97_frame));
	164	} else {
aff0510c CC	165	sport_set_rx_callback(sport, bf5xx_dma_irq, substream);
	166	sport_config_rx_dma(sport, sport->rx_dma_buf, runtime->periods,
	167	runtime->period_size * sizeof(struct ac97_frame));
	168	}
	169	#else
	170	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
	171	sport_set_tx_callback(sport, bf5xx_dma_irq, substream);
	172	sport_config_tx_dma(sport, runtime->dma_area, runtime->periods,
	173	runtime->period_size * sizeof(struct ac97_frame));
	174	} else {
	175	sport_set_rx_callback(sport, bf5xx_dma_irq, substream);
	176	sport_config_rx_dma(sport, runtime->dma_area, runtime->periods,
	177	runtime->period_size * sizeof(struct ac97_frame));
	178	}
	179	#endif
	180	return 0;
	181	}
	182
	183	static int bf5xx_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
	184	{
	185	struct snd_pcm_runtime *runtime = substream->runtime;
	186	struct sport_device *sport = runtime->private_data;
	187	int ret = 0;
	188
	189	pr_debug("%s enter\n", __func__);
	190	switch (cmd) {
	191	case SNDRV_PCM_TRIGGER_START:
6b58a821	192	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
a89e611a	193	#if defined(CONFIG_SND_BF5XX_MMAP_SUPPORT)
6b58a821	194	bf5xx_mmap_copy(substream, runtime->period_size);
6b58a821	195	sport->tx_delay_pos = 0;
a89e611a	196	#endif
aff0510c	197	sport_tx_start(sport);
67f854b9	198	} else
aff0510c CC	199	sport_rx_start(sport);
	200	break;
	201	case SNDRV_PCM_TRIGGER_STOP:
	202	case SNDRV_PCM_TRIGGER_SUSPEND:
	203	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
	204	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
67f854b9	205	#if defined(CONFIG_SND_BF5XX_MMAP_SUPPORT)
aff0510c CC	206	sport->tx_pos = 0;
	207	#endif
	208	sport_tx_stop(sport);
	209	} else {
67f854b9	210	#if defined(CONFIG_SND_BF5XX_MMAP_SUPPORT)
aff0510c CC	211	sport->rx_pos = 0;
	212	#endif
	213	sport_rx_stop(sport);
	214	}
	215	break;
	216	default:
	217	ret = -EINVAL;
	218	}
	219	return ret;
	220	}
	221
	222	static snd_pcm_uframes_t bf5xx_pcm_pointer(struct snd_pcm_substream *substream)
	223	{
	224	struct snd_pcm_runtime *runtime = substream->runtime;
	225	struct sport_device *sport = runtime->private_data;
	226	unsigned int curr;
	227
67f854b9	228	#if defined(CONFIG_SND_BF5XX_MMAP_SUPPORT)
aff0510c	229	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
6b58a821	230	curr = sport->tx_delay_pos;
aff0510c CC	231	else
	232	curr = sport->rx_pos;
	233	#else
	234
	235	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
	236	curr = sport_curr_offset_tx(sport) / sizeof(struct ac97_frame);
	237	else
	238	curr = sport_curr_offset_rx(sport) / sizeof(struct ac97_frame);
	239
	240	#endif
	241	return curr;
	242	}
	243
	244	static int bf5xx_pcm_open(struct snd_pcm_substream *substream)
	245	{
	246	struct snd_pcm_runtime *runtime = substream->runtime;
	247	int ret;
	248
	249	pr_debug("%s enter\n", __func__);
	250	snd_soc_set_runtime_hwparams(substream, &bf5xx_pcm_hardware);
	251
	252	ret = snd_pcm_hw_constraint_integer(runtime,
	253	SNDRV_PCM_HW_PARAM_PERIODS);
	254	if (ret < 0)
	255	goto out;
	256
	257	if (sport_handle != NULL)
	258	runtime->private_data = sport_handle;
	259	else {
	260	pr_err("sport_handle is NULL\n");
	261	return -1;
	262	}
	263	return 0;
	264
	265	out:
	266	return ret;
	267	}
	268
67f854b9	269	#if defined(CONFIG_SND_BF5XX_MMAP_SUPPORT)
aff0510c CC	270	static int bf5xx_pcm_mmap(struct snd_pcm_substream *substream,
	271	struct vm_area_struct *vma)
	272	{
	273	struct snd_pcm_runtime *runtime = substream->runtime;
	274	size_t size = vma->vm_end - vma->vm_start;
	275	vma->vm_start = (unsigned long)runtime->dma_area;
	276	vma->vm_end = vma->vm_start + size;
	277	vma->vm_flags \|= VM_SHARED;
	278	return 0 ;
	279	}
	280	#else
	281	static int bf5xx_pcm_copy(struct snd_pcm_substream *substream, int channel,
	282	snd_pcm_uframes_t pos,
	283	void __user *buf, snd_pcm_uframes_t count)
	284	{
	285	struct snd_pcm_runtime *runtime = substream->runtime;
a89e611a	286	unsigned int chan_mask = ac97_chan_mask[runtime->channels - 1];
aff0510c CC	287	pr_debug("%s copy pos:0x%lx count:0x%lx\n",
	288	substream->stream ? "Capture" : "Playback", pos, count);
	289
	290	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
67f854b9 CC	291	bf5xx_pcm_to_ac97((struct ac97_frame *)runtime->dma_area + pos,
67f854b9 CC	292	(__u16 *)buf, count, chan_mask);
aff0510c	293	else
67f854b9 CC	294	bf5xx_ac97_to_pcm((struct ac97_frame *)runtime->dma_area + pos,
67f854b9 CC	295	(__u16 *)buf, count);
aff0510c CC	296	return 0;
	297	}
	298	#endif
	299
b2a19d02	300	static struct snd_pcm_ops bf5xx_pcm_ac97_ops = {
aff0510c CC	301	.open = bf5xx_pcm_open,
	302	.ioctl = snd_pcm_lib_ioctl,
	303	.hw_params = bf5xx_pcm_hw_params,
	304	.hw_free = bf5xx_pcm_hw_free,
	305	.prepare = bf5xx_pcm_prepare,
	306	.trigger = bf5xx_pcm_trigger,
	307	.pointer = bf5xx_pcm_pointer,
67f854b9	308	#if defined(CONFIG_SND_BF5XX_MMAP_SUPPORT)
aff0510c CC	309	.mmap = bf5xx_pcm_mmap,
	310	#else
	311	.copy = bf5xx_pcm_copy,
	312	#endif
	313	};
	314
	315	static int bf5xx_pcm_preallocate_dma_buffer(struct snd_pcm *pcm, int stream)
	316	{
	317	struct snd_pcm_substream *substream = pcm->streams[stream].substream;
	318	struct snd_dma_buffer *buf = &substream->dma_buffer;
	319	size_t size = bf5xx_pcm_hardware.buffer_bytes_max
	320	* sizeof(struct ac97_frame) / 4;
	321
	322	buf->dev.type = SNDRV_DMA_TYPE_DEV;
	323	buf->dev.dev = pcm->card->dev;
	324	buf->private_data = NULL;
	325	buf->area = dma_alloc_coherent(pcm->card->dev, size,
	326	&buf->addr, GFP_KERNEL);
	327	if (!buf->area) {
	328	pr_err("Failed to allocate dma memory\n");
	329	pr_err("Please increase uncached DMA memory region\n");
	330	return -ENOMEM;
	331	}
	332	buf->bytes = size;
	333
	334	pr_debug("%s, area:%p, size:0x%08lx\n", __func__,
	335	buf->area, buf->bytes);
	336
	337	if (stream == SNDRV_PCM_STREAM_PLAYBACK)
	338	sport_handle->tx_buf = buf->area;
	339	else
	340	sport_handle->rx_buf = buf->area;
	341
	342	/*
	343	* Need to allocate local buffer when enable
	344	* MMAP for SPORT working in TMD mode (include AC97).
	345	*/
67f854b9	346	#if defined(CONFIG_SND_BF5XX_MMAP_SUPPORT)
aff0510c CC	347	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
	348	if (!sport_handle->tx_dma_buf) {
	349	sport_handle->tx_dma_buf = dma_alloc_coherent(NULL, \
	350	size, &sport_handle->tx_dma_phy, GFP_KERNEL);
	351	if (!sport_handle->tx_dma_buf) {
2f1ff661	352	pr_err("Failed to allocate memory for tx dma buf - Please increase uncached DMA memory region\n");
aff0510c CC	353	return -ENOMEM;
	354	} else
	355	memset(sport_handle->tx_dma_buf, 0, size);
	356	} else
	357	memset(sport_handle->tx_dma_buf, 0, size);
	358	} else {
	359	if (!sport_handle->rx_dma_buf) {
	360	sport_handle->rx_dma_buf = dma_alloc_coherent(NULL, \
	361	size, &sport_handle->rx_dma_phy, GFP_KERNEL);
	362	if (!sport_handle->rx_dma_buf) {
2f1ff661	363	pr_err("Failed to allocate memory for rx dma buf - Please increase uncached DMA memory region\n");
aff0510c CC	364	return -ENOMEM;
	365	} else
	366	memset(sport_handle->rx_dma_buf, 0, size);
	367	} else
	368	memset(sport_handle->rx_dma_buf, 0, size);
	369	}
	370	#endif
	371	return 0;
	372	}
	373
	374	static void bf5xx_pcm_free_dma_buffers(struct snd_pcm *pcm)
	375	{
	376	struct snd_pcm_substream *substream;
	377	struct snd_dma_buffer *buf;
	378	int stream;
67f854b9	379	#if defined(CONFIG_SND_BF5XX_MMAP_SUPPORT)
aff0510c CC	380	size_t size = bf5xx_pcm_hardware.buffer_bytes_max *
	381	sizeof(struct ac97_frame) / 4;
	382	#endif
	383	for (stream = 0; stream < 2; stream++) {
	384	substream = pcm->streams[stream].substream;
	385	if (!substream)
	386	continue;
	387
	388	buf = &substream->dma_buffer;
	389	if (!buf->area)
	390	continue;
	391	dma_free_coherent(NULL, buf->bytes, buf->area, 0);
	392	buf->area = NULL;
67f854b9	393	#if defined(CONFIG_SND_BF5XX_MMAP_SUPPORT)
aff0510c CC	394	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
	395	if (sport_handle->tx_dma_buf)
	396	dma_free_coherent(NULL, size, \
	397	sport_handle->tx_dma_buf, 0);
	398	sport_handle->tx_dma_buf = NULL;
	399	} else {
	400
	401	if (sport_handle->rx_dma_buf)
	402	dma_free_coherent(NULL, size, \
	403	sport_handle->rx_dma_buf, 0);
	404	sport_handle->rx_dma_buf = NULL;
	405	}
	406	#endif
	407	}
	408	if (sport_handle)
	409	sport_done(sport_handle);
	410	}
	411
284901a9	412	static u64 bf5xx_pcm_dmamask = DMA_BIT_MASK(32);
aff0510c CC	413
	414	int bf5xx_pcm_ac97_new(struct snd_card card, struct snd_soc_dai dai,
	415	struct snd_pcm *pcm)
	416	{
	417	int ret = 0;
	418
	419	pr_debug("%s enter\n", __func__);
	420	if (!card->dev->dma_mask)
	421	card->dev->dma_mask = &bf5xx_pcm_dmamask;
	422	if (!card->dev->coherent_dma_mask)
284901a9	423	card->dev->coherent_dma_mask = DMA_BIT_MASK(32);
aff0510c CC	424
	425	if (dai->playback.channels_min) {
	426	ret = bf5xx_pcm_preallocate_dma_buffer(pcm,
	427	SNDRV_PCM_STREAM_PLAYBACK);
	428	if (ret)
	429	goto out;
	430	}
	431
	432	if (dai->capture.channels_min) {
	433	ret = bf5xx_pcm_preallocate_dma_buffer(pcm,
	434	SNDRV_PCM_STREAM_CAPTURE);
	435	if (ret)
	436	goto out;
	437	}
	438	out:
	439	return ret;
	440	}
	441
	442	struct snd_soc_platform bf5xx_ac97_soc_platform = {
	443	.name = "bf5xx-audio",
	444	.pcm_ops = &bf5xx_pcm_ac97_ops,
	445	.pcm_new = bf5xx_pcm_ac97_new,
	446	.pcm_free = bf5xx_pcm_free_dma_buffers,
	447	};
	448	EXPORT_SYMBOL_GPL(bf5xx_ac97_soc_platform);
	449
c9b3a40f	450	static int __init bfin_ac97_init(void)
958e792c MB	451	{
	452	return snd_soc_register_platform(&bf5xx_ac97_soc_platform);
	453	}
	454	module_init(bfin_ac97_init);
	455
	456	static void __exit bfin_ac97_exit(void)
	457	{
	458	snd_soc_unregister_platform(&bf5xx_ac97_soc_platform);
	459	}
	460	module_exit(bfin_ac97_exit);
	461
aff0510c CC	462	MODULE_AUTHOR("Cliff Cai");
	463	MODULE_DESCRIPTION("ADI Blackfin AC97 PCM DMA module");
	464	MODULE_LICENSE("GPL");