[deliverable/linux.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.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,

	.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_soc_pcm_runtime *rtd = substream->private_data;
	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
	struct sport_device *sport_handle = snd_soc_dai_get_drvdata(cpu_dai);
	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_soc_pcm_runtime *rtd = pcm->private_data;
	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
	struct sport_device *sport_handle = snd_soc_dai_get_drvdata(cpu_dai);
	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)
	struct snd_soc_pcm_runtime *rtd = pcm->private_data;
	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
	struct sport_device *sport_handle = snd_soc_dai_get_drvdata(cpu_dai);
	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
	}
}

static int bf5xx_pcm_ac97_new(struct snd_soc_pcm_runtime *rtd)
{
	struct snd_card *card = rtd->card->snd_card;
	struct snd_pcm *pcm = rtd->pcm;
	int ret;

	pr_debug("%s enter\n", __func__);
	ret = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(32));
	if (ret)
		return ret;

	if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream) {
		ret = bf5xx_pcm_preallocate_dma_buffer(pcm,
			SNDRV_PCM_STREAM_PLAYBACK);
		if (ret)
			goto out;
	}

	if (pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream) {
		ret = bf5xx_pcm_preallocate_dma_buffer(pcm,
			SNDRV_PCM_STREAM_CAPTURE);
		if (ret)
			goto out;
	}
 out:
	return ret;
}

static struct snd_soc_platform_driver bf5xx_ac97_soc_platform = {
	.ops			= &bf5xx_pcm_ac97_ops,
	.pcm_new	= bf5xx_pcm_ac97_new,
	.pcm_free	= bf5xx_pcm_free_dma_buffers,
};

static int bf5xx_soc_platform_probe(struct platform_device *pdev)
{
	return snd_soc_register_platform(&pdev->dev, &bf5xx_ac97_soc_platform);
}

static int bf5xx_soc_platform_remove(struct platform_device *pdev)
{
	snd_soc_unregister_platform(&pdev->dev);
	return 0;
}

static struct platform_driver bf5xx_pcm_driver = {
	.driver = {
			.name = "bfin-ac97-pcm-audio",
			.owner = THIS_MODULE,
	},

	.probe = bf5xx_soc_platform_probe,
	.remove = bf5xx_soc_platform_remove,
};

module_platform_driver(bf5xx_pcm_driver);

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
aff0510c CC	42	#include "bf5xx-ac97.h"
	43	#include "bf5xx-sport.h"
	44
67f854b9 CC	45	static unsigned int ac97_chan_mask[] = {
	46	SP_FL, /* Mono */
	47	SP_STEREO, /* Stereo */
	48	SP_2DOT1, /* 2.1*/
	49	SP_QUAD,/Quadraquic/
	50	SP_FL \| SP_FR \| SP_FC \| SP_SL \| SP_SR,/5 channels /
	51	SP_5DOT1, /* 5.1 */
	52	};
	53
	54	#if defined(CONFIG_SND_BF5XX_MMAP_SUPPORT)
aff0510c CC	55	static void bf5xx_mmap_copy(struct snd_pcm_substream *substream,
	56	snd_pcm_uframes_t count)
	57	{
	58	struct snd_pcm_runtime *runtime = substream->runtime;
	59	struct sport_device *sport = runtime->private_data;
67f854b9	60	unsigned int chan_mask = ac97_chan_mask[runtime->channels - 1];
aff0510c	61	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
67f854b9 CC	62	bf5xx_pcm_to_ac97((struct ac97_frame *)sport->tx_dma_buf +
	63	sport->tx_pos, (__u16 )runtime->dma_area + sport->tx_pos
	64	runtime->channels, count, chan_mask);
aff0510c CC	65	sport->tx_pos += runtime->period_size;
	66	if (sport->tx_pos >= runtime->buffer_size)
	67	sport->tx_pos %= runtime->buffer_size;
6b58a821	68	sport->tx_delay_pos = sport->tx_pos;
aff0510c	69	} else {
67f854b9 CC	70	bf5xx_ac97_to_pcm((struct ac97_frame *)sport->rx_dma_buf +
	71	sport->rx_pos, (__u16 )runtime->dma_area + sport->rx_pos
	72	runtime->channels, count);
aff0510c CC	73	sport->rx_pos += runtime->period_size;
	74	if (sport->rx_pos >= runtime->buffer_size)
	75	sport->rx_pos %= runtime->buffer_size;
	76	}
	77	}
	78	#endif
	79
	80	static void bf5xx_dma_irq(void *data)
	81	{
	82	struct snd_pcm_substream *pcm = data;
67f854b9	83	#if defined(CONFIG_SND_BF5XX_MMAP_SUPPORT)
aff0510c	84	struct snd_pcm_runtime *runtime = pcm->runtime;
6b58a821	85	struct sport_device *sport = runtime->private_data;
aff0510c	86	bf5xx_mmap_copy(pcm, runtime->period_size);
6b58a821 CC	87	if (pcm->stream == SNDRV_PCM_STREAM_PLAYBACK) {
	88	if (sport->once == 0) {
	89	snd_pcm_period_elapsed(pcm);
	90	bf5xx_mmap_copy(pcm, runtime->period_size);
	91	sport->once = 1;
	92	}
	93	}
aff0510c CC	94	#endif
	95	snd_pcm_period_elapsed(pcm);
	96	}
	97
	98	/* The memory size for pure pcm data is 128*1024 = 0x20000 bytes.
	99	* The total rx/tx buffer is for ac97 frame to hold all pcm data
	100	* is 0x20000 * sizeof(struct ac97_frame) / 4.
	101	*/
aff0510c CC	102	static const struct snd_pcm_hardware bf5xx_pcm_hardware = {
aff0510c CC	103	.info = SNDRV_PCM_INFO_INTERLEAVED \|
27b9be5a	104	#if defined(CONFIG_SND_BF5XX_MMAP_SUPPORT)
aff0510c CC	105	SNDRV_PCM_INFO_MMAP \|
aff0510c CC	106	SNDRV_PCM_INFO_MMAP_VALID \|
aff0510c	107	#endif
27b9be5a BW	108	SNDRV_PCM_INFO_BLOCK_TRANSFER,
27b9be5a BW	109
aff0510c CC	110	.period_bytes_min = 32,
	111	.period_bytes_max = 0x10000,
	112	.periods_min = 1,
	113	.periods_max = PAGE_SIZE/32,
	114	.buffer_bytes_max = 0x20000, /* 128 kbytes */
	115	.fifo_size = 16,
	116	};
	117
	118	static int bf5xx_pcm_hw_params(struct snd_pcm_substream *substream,
	119	struct snd_pcm_hw_params *params)
	120	{
	121	size_t size = bf5xx_pcm_hardware.buffer_bytes_max
	122	* sizeof(struct ac97_frame) / 4;
	123
	124	snd_pcm_lib_malloc_pages(substream, size);
	125
	126	return 0;
	127	}
	128
	129	static int bf5xx_pcm_hw_free(struct snd_pcm_substream *substream)
	130	{
67f854b9	131	#if defined(CONFIG_SND_BF5XX_MMAP_SUPPORT)
6b58a821	132	struct snd_pcm_runtime *runtime = substream->runtime;
67f854b9	133	struct sport_device *sport = runtime->private_data;
6b58a821	134
67f854b9 CC	135	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
	136	sport->once = 0;
	137	if (runtime->dma_area)
	138	memset(runtime->dma_area, 0, runtime->buffer_size);
	139	memset(sport->tx_dma_buf, 0, runtime->buffer_size *
	140	sizeof(struct ac97_frame));
	141	} else
	142	memset(sport->rx_dma_buf, 0, runtime->buffer_size *
	143	sizeof(struct ac97_frame));
	144	#endif
aff0510c CC	145	snd_pcm_lib_free_pages(substream);
	146	return 0;
	147	}
	148
	149	static int bf5xx_pcm_prepare(struct snd_pcm_substream *substream)
	150	{
	151	struct snd_pcm_runtime *runtime = substream->runtime;
	152	struct sport_device *sport = runtime->private_data;
	153
	154	/* An intermediate buffer is introduced for implementing mmap for
	155	* SPORT working in TMD mode(include AC97).
	156	*/
67f854b9	157	#if defined(CONFIG_SND_BF5XX_MMAP_SUPPORT)
aff0510c	158	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
aff0510c CC	159	sport_set_tx_callback(sport, bf5xx_dma_irq, substream);
	160	sport_config_tx_dma(sport, sport->tx_dma_buf, runtime->periods,
	161	runtime->period_size * sizeof(struct ac97_frame));
	162	} else {
aff0510c CC	163	sport_set_rx_callback(sport, bf5xx_dma_irq, substream);
	164	sport_config_rx_dma(sport, sport->rx_dma_buf, runtime->periods,
	165	runtime->period_size * sizeof(struct ac97_frame));
	166	}
	167	#else
	168	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
	169	sport_set_tx_callback(sport, bf5xx_dma_irq, substream);
	170	sport_config_tx_dma(sport, runtime->dma_area, runtime->periods,
	171	runtime->period_size * sizeof(struct ac97_frame));
	172	} else {
	173	sport_set_rx_callback(sport, bf5xx_dma_irq, substream);
	174	sport_config_rx_dma(sport, runtime->dma_area, runtime->periods,
	175	runtime->period_size * sizeof(struct ac97_frame));
	176	}
	177	#endif
	178	return 0;
	179	}
	180
	181	static int bf5xx_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
	182	{
	183	struct snd_pcm_runtime *runtime = substream->runtime;
	184	struct sport_device *sport = runtime->private_data;
	185	int ret = 0;
	186
	187	pr_debug("%s enter\n", __func__);
	188	switch (cmd) {
	189	case SNDRV_PCM_TRIGGER_START:
6b58a821	190	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
a89e611a	191	#if defined(CONFIG_SND_BF5XX_MMAP_SUPPORT)
6b58a821	192	bf5xx_mmap_copy(substream, runtime->period_size);
6b58a821	193	sport->tx_delay_pos = 0;
a89e611a	194	#endif
aff0510c	195	sport_tx_start(sport);
67f854b9	196	} else
aff0510c CC	197	sport_rx_start(sport);
	198	break;
	199	case SNDRV_PCM_TRIGGER_STOP:
	200	case SNDRV_PCM_TRIGGER_SUSPEND:
	201	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
	202	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
67f854b9	203	#if defined(CONFIG_SND_BF5XX_MMAP_SUPPORT)
aff0510c CC	204	sport->tx_pos = 0;
	205	#endif
	206	sport_tx_stop(sport);
	207	} else {
67f854b9	208	#if defined(CONFIG_SND_BF5XX_MMAP_SUPPORT)
aff0510c CC	209	sport->rx_pos = 0;
	210	#endif
	211	sport_rx_stop(sport);
	212	}
	213	break;
	214	default:
	215	ret = -EINVAL;
	216	}
	217	return ret;
	218	}
	219
	220	static snd_pcm_uframes_t bf5xx_pcm_pointer(struct snd_pcm_substream *substream)
	221	{
	222	struct snd_pcm_runtime *runtime = substream->runtime;
	223	struct sport_device *sport = runtime->private_data;
	224	unsigned int curr;
	225
67f854b9	226	#if defined(CONFIG_SND_BF5XX_MMAP_SUPPORT)
aff0510c	227	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
6b58a821	228	curr = sport->tx_delay_pos;
aff0510c CC	229	else
	230	curr = sport->rx_pos;
	231	#else
	232
	233	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
	234	curr = sport_curr_offset_tx(sport) / sizeof(struct ac97_frame);
	235	else
	236	curr = sport_curr_offset_rx(sport) / sizeof(struct ac97_frame);
	237
	238	#endif
	239	return curr;
	240	}
	241
	242	static int bf5xx_pcm_open(struct snd_pcm_substream *substream)
	243	{
2c66cb99 BS	244	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	245	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
	246	struct sport_device *sport_handle = snd_soc_dai_get_drvdata(cpu_dai);
aff0510c CC	247	struct snd_pcm_runtime *runtime = substream->runtime;
	248	int ret;
	249
	250	pr_debug("%s enter\n", __func__);
	251	snd_soc_set_runtime_hwparams(substream, &bf5xx_pcm_hardware);
	252
	253	ret = snd_pcm_hw_constraint_integer(runtime,
	254	SNDRV_PCM_HW_PARAM_PERIODS);
	255	if (ret < 0)
	256	goto out;
	257
	258	if (sport_handle != NULL)
	259	runtime->private_data = sport_handle;
	260	else {
	261	pr_err("sport_handle is NULL\n");
	262	return -1;
	263	}
	264	return 0;
	265
	266	out:
	267	return ret;
	268	}
	269
67f854b9	270	#if defined(CONFIG_SND_BF5XX_MMAP_SUPPORT)
aff0510c CC	271	static int bf5xx_pcm_mmap(struct snd_pcm_substream *substream,
	272	struct vm_area_struct *vma)
	273	{
	274	struct snd_pcm_runtime *runtime = substream->runtime;
	275	size_t size = vma->vm_end - vma->vm_start;
	276	vma->vm_start = (unsigned long)runtime->dma_area;
	277	vma->vm_end = vma->vm_start + size;
	278	vma->vm_flags \|= VM_SHARED;
	279	return 0 ;
	280	}
	281	#else
	282	static int bf5xx_pcm_copy(struct snd_pcm_substream *substream, int channel,
	283	snd_pcm_uframes_t pos,
	284	void __user *buf, snd_pcm_uframes_t count)
	285	{
	286	struct snd_pcm_runtime *runtime = substream->runtime;
a89e611a	287	unsigned int chan_mask = ac97_chan_mask[runtime->channels - 1];
aff0510c CC	288	pr_debug("%s copy pos:0x%lx count:0x%lx\n",
	289	substream->stream ? "Capture" : "Playback", pos, count);
	290
	291	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
67f854b9 CC	292	bf5xx_pcm_to_ac97((struct ac97_frame *)runtime->dma_area + pos,
67f854b9 CC	293	(__u16 *)buf, count, chan_mask);
aff0510c	294	else
67f854b9 CC	295	bf5xx_ac97_to_pcm((struct ac97_frame *)runtime->dma_area + pos,
67f854b9 CC	296	(__u16 *)buf, count);
aff0510c CC	297	return 0;
	298	}
	299	#endif
	300
b2a19d02	301	static struct snd_pcm_ops bf5xx_pcm_ac97_ops = {
aff0510c CC	302	.open = bf5xx_pcm_open,
	303	.ioctl = snd_pcm_lib_ioctl,
	304	.hw_params = bf5xx_pcm_hw_params,
	305	.hw_free = bf5xx_pcm_hw_free,
	306	.prepare = bf5xx_pcm_prepare,
	307	.trigger = bf5xx_pcm_trigger,
	308	.pointer = bf5xx_pcm_pointer,
67f854b9	309	#if defined(CONFIG_SND_BF5XX_MMAP_SUPPORT)
aff0510c CC	310	.mmap = bf5xx_pcm_mmap,
	311	#else
	312	.copy = bf5xx_pcm_copy,
	313	#endif
	314	};
	315
	316	static int bf5xx_pcm_preallocate_dma_buffer(struct snd_pcm *pcm, int stream)
	317	{
2c66cb99 BS	318	struct snd_soc_pcm_runtime *rtd = pcm->private_data;
	319	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
	320	struct sport_device *sport_handle = snd_soc_dai_get_drvdata(cpu_dai);
aff0510c CC	321	struct snd_pcm_substream *substream = pcm->streams[stream].substream;
	322	struct snd_dma_buffer *buf = &substream->dma_buffer;
	323	size_t size = bf5xx_pcm_hardware.buffer_bytes_max
	324	* sizeof(struct ac97_frame) / 4;
	325
	326	buf->dev.type = SNDRV_DMA_TYPE_DEV;
	327	buf->dev.dev = pcm->card->dev;
	328	buf->private_data = NULL;
	329	buf->area = dma_alloc_coherent(pcm->card->dev, size,
	330	&buf->addr, GFP_KERNEL);
	331	if (!buf->area) {
	332	pr_err("Failed to allocate dma memory\n");
	333	pr_err("Please increase uncached DMA memory region\n");
	334	return -ENOMEM;
	335	}
	336	buf->bytes = size;
	337
	338	pr_debug("%s, area:%p, size:0x%08lx\n", __func__,
	339	buf->area, buf->bytes);
	340
	341	if (stream == SNDRV_PCM_STREAM_PLAYBACK)
	342	sport_handle->tx_buf = buf->area;
	343	else
	344	sport_handle->rx_buf = buf->area;
	345
	346	/*
	347	* Need to allocate local buffer when enable
	348	* MMAP for SPORT working in TMD mode (include AC97).
	349	*/
67f854b9	350	#if defined(CONFIG_SND_BF5XX_MMAP_SUPPORT)
aff0510c CC	351	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
	352	if (!sport_handle->tx_dma_buf) {
	353	sport_handle->tx_dma_buf = dma_alloc_coherent(NULL, \
	354	size, &sport_handle->tx_dma_phy, GFP_KERNEL);
	355	if (!sport_handle->tx_dma_buf) {
2f1ff661	356	pr_err("Failed to allocate memory for tx dma buf - Please increase uncached DMA memory region\n");
aff0510c CC	357	return -ENOMEM;
	358	} else
	359	memset(sport_handle->tx_dma_buf, 0, size);
	360	} else
	361	memset(sport_handle->tx_dma_buf, 0, size);
	362	} else {
	363	if (!sport_handle->rx_dma_buf) {
	364	sport_handle->rx_dma_buf = dma_alloc_coherent(NULL, \
	365	size, &sport_handle->rx_dma_phy, GFP_KERNEL);
	366	if (!sport_handle->rx_dma_buf) {
2f1ff661	367	pr_err("Failed to allocate memory for rx dma buf - Please increase uncached DMA memory region\n");
aff0510c CC	368	return -ENOMEM;
	369	} else
	370	memset(sport_handle->rx_dma_buf, 0, size);
	371	} else
	372	memset(sport_handle->rx_dma_buf, 0, size);
	373	}
	374	#endif
	375	return 0;
	376	}
	377
	378	static void bf5xx_pcm_free_dma_buffers(struct snd_pcm *pcm)
	379	{
	380	struct snd_pcm_substream *substream;
	381	struct snd_dma_buffer *buf;
	382	int stream;
67f854b9	383	#if defined(CONFIG_SND_BF5XX_MMAP_SUPPORT)
2c66cb99 BS	384	struct snd_soc_pcm_runtime *rtd = pcm->private_data;
	385	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
	386	struct sport_device *sport_handle = snd_soc_dai_get_drvdata(cpu_dai);
aff0510c CC	387	size_t size = bf5xx_pcm_hardware.buffer_bytes_max *
	388	sizeof(struct ac97_frame) / 4;
	389	#endif
	390	for (stream = 0; stream < 2; stream++) {
	391	substream = pcm->streams[stream].substream;
	392	if (!substream)
	393	continue;
	394
	395	buf = &substream->dma_buffer;
	396	if (!buf->area)
	397	continue;
	398	dma_free_coherent(NULL, buf->bytes, buf->area, 0);
	399	buf->area = NULL;
67f854b9	400	#if defined(CONFIG_SND_BF5XX_MMAP_SUPPORT)
aff0510c CC	401	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
	402	if (sport_handle->tx_dma_buf)
	403	dma_free_coherent(NULL, size, \
	404	sport_handle->tx_dma_buf, 0);
	405	sport_handle->tx_dma_buf = NULL;
	406	} else {
	407
	408	if (sport_handle->rx_dma_buf)
	409	dma_free_coherent(NULL, size, \
	410	sport_handle->rx_dma_buf, 0);
	411	sport_handle->rx_dma_buf = NULL;
	412	}
	413	#endif
	414	}
aff0510c CC	415	}
aff0510c CC	416
3156cf73	417	static int bf5xx_pcm_ac97_new(struct snd_soc_pcm_runtime *rtd)
aff0510c	418	{
552d1ef6	419	struct snd_card *card = rtd->card->snd_card;
552d1ef6	420	struct snd_pcm *pcm = rtd->pcm;
c9bd5e69	421	int ret;
aff0510c CC	422
aff0510c CC	423	pr_debug("%s enter\n", __func__);
c9bd5e69 RK	424	ret = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(32));
	425	if (ret)
	426	return ret;
aff0510c	427
25e9e756	428	if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream) {
aff0510c CC	429	ret = bf5xx_pcm_preallocate_dma_buffer(pcm,
	430	SNDRV_PCM_STREAM_PLAYBACK);
	431	if (ret)
	432	goto out;
	433	}
	434
25e9e756	435	if (pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream) {
aff0510c CC	436	ret = bf5xx_pcm_preallocate_dma_buffer(pcm,
	437	SNDRV_PCM_STREAM_CAPTURE);
	438	if (ret)
	439	goto out;
	440	}
	441	out:
	442	return ret;
	443	}
	444
f0fba2ad LG	445	static struct snd_soc_platform_driver bf5xx_ac97_soc_platform = {
f0fba2ad LG	446	.ops = &bf5xx_pcm_ac97_ops,
aff0510c CC	447	.pcm_new = bf5xx_pcm_ac97_new,
	448	.pcm_free = bf5xx_pcm_free_dma_buffers,
	449	};
aff0510c	450
dca66dab	451	static int bf5xx_soc_platform_probe(struct platform_device *pdev)
958e792c	452	{
f0fba2ad	453	return snd_soc_register_platform(&pdev->dev, &bf5xx_ac97_soc_platform);
958e792c	454	}
958e792c	455
dca66dab	456	static int bf5xx_soc_platform_remove(struct platform_device *pdev)
958e792c	457	{
f0fba2ad LG	458	snd_soc_unregister_platform(&pdev->dev);
	459	return 0;
	460	}
	461
	462	static struct platform_driver bf5xx_pcm_driver = {
	463	.driver = {
bfe4ee0a	464	.name = "bfin-ac97-pcm-audio",
f0fba2ad LG	465	.owner = THIS_MODULE,
	466	},
	467
	468	.probe = bf5xx_soc_platform_probe,
dca66dab	469	.remove = bf5xx_soc_platform_remove,
f0fba2ad LG	470	};
f0fba2ad LG	471
fb80297e	472	module_platform_driver(bf5xx_pcm_driver);
958e792c	473
aff0510c CC	474	MODULE_AUTHOR("Cliff Cai");
	475	MODULE_DESCRIPTION("ADI Blackfin AC97 PCM DMA module");
	476	MODULE_LICENSE("GPL");