[GitHub/mt8127/android_kernel_alcatel_ttab.git] / sound / soc / blackfin / bf5xx-ac97.c

/*
 * bf5xx-ac97.c -- AC97 support for the ADI blackfin chip.
 *
 * Author:	Roy Huang
 * Created:	11th. June 2007
 * Copyright:	Analog Device Inc.
 *
 * 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/init.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/interrupt.h>
#include <linux/wait.h>
#include <linux/delay.h>
#include <linux/slab.h>

#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/ac97_codec.h>
#include <sound/initval.h>
#include <sound/soc.h>

#include <asm/irq.h>
#include <asm/portmux.h>
#include <linux/mutex.h>
#include <linux/gpio.h>

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

/* Anomaly notes:
 *  05000250 -	AD1980 is running in TDM mode and RFS/TFS are generated by SPORT
 *		contrtoller. But, RFSDIV and TFSDIV are always set to 16*16-1,
 *		while the max AC97 data size is 13*16. The DIV is always larger
 *		than data size. AD73311 and ad2602 are not running in TDM mode.
 *		AD1836 and AD73322 depend on external RFS/TFS only. So, this
 *		anomaly does not affect blackfin sound drivers.
*/

static struct sport_device *ac97_sport_handle;

void bf5xx_pcm_to_ac97(struct ac97_frame *dst, const __u16 *src,
		size_t count, unsigned int chan_mask)
{
	while (count--) {
		dst->ac97_tag = TAG_VALID;
		if (chan_mask & SP_FL) {
			dst->ac97_pcm_r = *src++;
			dst->ac97_tag |= TAG_PCM_RIGHT;
		}
		if (chan_mask & SP_FR) {
			dst->ac97_pcm_l = *src++;
			dst->ac97_tag |= TAG_PCM_LEFT;

		}
#if defined(CONFIG_SND_BF5XX_MULTICHAN_SUPPORT)
		if (chan_mask & SP_SR) {
			dst->ac97_sl = *src++;
			dst->ac97_tag |= TAG_PCM_SL;
		}
		if (chan_mask & SP_SL) {
			dst->ac97_sr = *src++;
			dst->ac97_tag |= TAG_PCM_SR;
		}
		if (chan_mask & SP_LFE) {
			dst->ac97_lfe = *src++;
			dst->ac97_tag |= TAG_PCM_LFE;
		}
		if (chan_mask & SP_FC) {
			dst->ac97_center = *src++;
			dst->ac97_tag |= TAG_PCM_CENTER;
		}
#endif
		dst++;
	}
}
EXPORT_SYMBOL(bf5xx_pcm_to_ac97);

void bf5xx_ac97_to_pcm(const struct ac97_frame *src, __u16 *dst,
		size_t count)
{
	while (count--) {
		*(dst++) = src->ac97_pcm_l;
		*(dst++) = src->ac97_pcm_r;
		src++;
	}
}
EXPORT_SYMBOL(bf5xx_ac97_to_pcm);

static unsigned int sport_tx_curr_frag(struct sport_device *sport)
{
	return sport->tx_curr_frag = sport_curr_offset_tx(sport) /
			sport->tx_fragsize;
}

static void enqueue_cmd(struct snd_ac97 *ac97, __u16 addr, __u16 data)
{
	struct sport_device *sport = ac97_sport_handle;
	int *cmd_count = sport->private_data;
	int nextfrag = sport_tx_curr_frag(sport);
	struct ac97_frame *nextwrite;

	sport_incfrag(sport, &nextfrag, 1);

	nextwrite = (struct ac97_frame *)(sport->tx_buf +
			nextfrag * sport->tx_fragsize);
	pr_debug("sport->tx_buf:%p, nextfrag:0x%x nextwrite:%p, cmd_count:%d\n",
		sport->tx_buf, nextfrag, nextwrite, cmd_count[nextfrag]);
	nextwrite[cmd_count[nextfrag]].ac97_tag |= TAG_CMD;
	nextwrite[cmd_count[nextfrag]].ac97_addr = addr;
	nextwrite[cmd_count[nextfrag]].ac97_data = data;
	++cmd_count[nextfrag];
	pr_debug("ac97_sport: Inserting %02x/%04x into fragment %d\n",
			addr >> 8, data, nextfrag);
}

static unsigned short bf5xx_ac97_read(struct snd_ac97 *ac97,
	unsigned short reg)
{
	struct sport_device *sport_handle = ac97_sport_handle;
	struct ac97_frame out_frame[2], in_frame[2];

	pr_debug("%s enter 0x%x\n", __func__, reg);

	/* When dma descriptor is enabled, the register should not be read */
	if (sport_handle->tx_run || sport_handle->rx_run) {
		pr_err("Could you send a mail to cliff.cai@analog.com "
				"to report this?\n");
		return -EFAULT;
	}

	memset(&out_frame, 0, 2 * sizeof(struct ac97_frame));
	memset(&in_frame, 0, 2 * sizeof(struct ac97_frame));
	out_frame[0].ac97_tag = TAG_VALID | TAG_CMD;
	out_frame[0].ac97_addr = ((reg << 8) | 0x8000);
	sport_send_and_recv(sport_handle, (unsigned char *)&out_frame,
			(unsigned char *)&in_frame,
			2 * sizeof(struct ac97_frame));
	return in_frame[1].ac97_data;
}

void bf5xx_ac97_write(struct snd_ac97 *ac97, unsigned short reg,
	unsigned short val)
{
	struct sport_device *sport_handle = ac97_sport_handle;

	pr_debug("%s enter 0x%x:0x%04x\n", __func__, reg, val);

	if (sport_handle->tx_run) {
		enqueue_cmd(ac97, (reg << 8), val); /* write */
		enqueue_cmd(ac97, (reg << 8) | 0x8000, 0); /* read back */
	} else {
		struct ac97_frame frame;
		memset(&frame, 0, sizeof(struct ac97_frame));
		frame.ac97_tag = TAG_VALID | TAG_CMD;
		frame.ac97_addr = (reg << 8);
		frame.ac97_data = val;
		sport_send_and_recv(sport_handle, (unsigned char *)&frame, \
				NULL, sizeof(struct ac97_frame));
	}
}

static void bf5xx_ac97_warm_reset(struct snd_ac97 *ac97)
{
	struct sport_device *sport_handle = ac97_sport_handle;
	u16 gpio = P_IDENT(sport_handle->pin_req[3]);

	pr_debug("%s enter\n", __func__);

	peripheral_free_list(sport_handle->pin_req);
	gpio_request(gpio, "bf5xx-ac97");
	gpio_direction_output(gpio, 1);
	udelay(2);
	gpio_set_value(gpio, 0);
	udelay(1);
	gpio_free(gpio);
	peripheral_request_list(sport_handle->pin_req, "soc-audio");
}

static void bf5xx_ac97_cold_reset(struct snd_ac97 *ac97)
{
#ifdef CONFIG_SND_BF5XX_HAVE_COLD_RESET
	pr_debug("%s enter\n", __func__);

	/* It is specified for bf548-ezkit */
	gpio_set_value(CONFIG_SND_BF5XX_RESET_GPIO_NUM, 0);
	/* Keep reset pin low for 1 ms */
	mdelay(1);
	gpio_set_value(CONFIG_SND_BF5XX_RESET_GPIO_NUM, 1);
	/* Wait for bit clock recover */
	mdelay(1);
#else
	pr_info("%s: Not implemented\n", __func__);
#endif
}

struct snd_ac97_bus_ops soc_ac97_ops = {
	.read	= bf5xx_ac97_read,
	.write	= bf5xx_ac97_write,
	.warm_reset	= bf5xx_ac97_warm_reset,
	.reset	= bf5xx_ac97_cold_reset,
};
EXPORT_SYMBOL_GPL(soc_ac97_ops);

#ifdef CONFIG_PM
static int bf5xx_ac97_suspend(struct snd_soc_dai *dai)
{
	struct sport_device *sport = snd_soc_dai_get_drvdata(dai);

	pr_debug("%s : sport %d\n", __func__, dai->id);
	if (!dai->active)
		return 0;
	if (dai->capture_active)
		sport_rx_stop(sport);
	if (dai->playback_active)
		sport_tx_stop(sport);
	return 0;
}

static int bf5xx_ac97_resume(struct snd_soc_dai *dai)
{
	int ret;
	struct sport_device *sport = snd_soc_dai_get_drvdata(dai);

	pr_debug("%s : sport %d\n", __func__, dai->id);
	if (!dai->active)
		return 0;

#if defined(CONFIG_SND_BF5XX_MULTICHAN_SUPPORT)
	ret = sport_set_multichannel(sport, 16, 0x3FF, 1);
#else
	ret = sport_set_multichannel(sport, 16, 0x1F, 1);
#endif
	if (ret) {
		pr_err("SPORT is busy!\n");
		return -EBUSY;
	}

	ret = sport_config_rx(sport, IRFS, 0xF, 0, (16*16-1));
	if (ret) {
		pr_err("SPORT is busy!\n");
		return -EBUSY;
	}

	ret = sport_config_tx(sport, ITFS, 0xF, 0, (16*16-1));
	if (ret) {
		pr_err("SPORT is busy!\n");
		return -EBUSY;
	}

	return 0;
}

#else
#define bf5xx_ac97_suspend	NULL
#define bf5xx_ac97_resume	NULL
#endif

static struct snd_soc_dai_driver bfin_ac97_dai = {
	.ac97_control = 1,
	.suspend = bf5xx_ac97_suspend,
	.resume = bf5xx_ac97_resume,
	.playback = {
		.stream_name = "AC97 Playback",
		.channels_min = 2,
#if defined(CONFIG_SND_BF5XX_MULTICHAN_SUPPORT)
		.channels_max = 6,
#else
		.channels_max = 2,
#endif
		.rates = SNDRV_PCM_RATE_48000,
		.formats = SNDRV_PCM_FMTBIT_S16_LE, },
	.capture = {
		.stream_name = "AC97 Capture",
		.channels_min = 2,
		.channels_max = 2,
		.rates = SNDRV_PCM_RATE_48000,
		.formats = SNDRV_PCM_FMTBIT_S16_LE, },
};

static int __devinit asoc_bfin_ac97_probe(struct platform_device *pdev)
{
	struct sport_device *sport_handle;
	int ret;

#ifdef CONFIG_SND_BF5XX_HAVE_COLD_RESET
	/* Request PB3 as reset pin */
	if (gpio_request(CONFIG_SND_BF5XX_RESET_GPIO_NUM, "SND_AD198x RESET")) {
		pr_err("Failed to request GPIO_%d for reset\n",
				CONFIG_SND_BF5XX_RESET_GPIO_NUM);
		ret =  -1;
		goto gpio_err;
	}
	gpio_direction_output(CONFIG_SND_BF5XX_RESET_GPIO_NUM, 1);
#endif

	sport_handle = sport_init(pdev, 2, sizeof(struct ac97_frame),
		PAGE_SIZE);
	if (!sport_handle) {
		ret = -ENODEV;
		goto sport_err;
	}

	/*SPORT works in TDM mode to simulate AC97 transfers*/
#if defined(CONFIG_SND_BF5XX_MULTICHAN_SUPPORT)
	ret = sport_set_multichannel(sport_handle, 16, 0x3FF, 1);
#else
	ret = sport_set_multichannel(sport_handle, 16, 0x1F, 1);
#endif
	if (ret) {
		pr_err("SPORT is busy!\n");
		ret = -EBUSY;
		goto sport_config_err;
	}

	ret = sport_config_rx(sport_handle, IRFS, 0xF, 0, (16*16-1));
	if (ret) {
		pr_err("SPORT is busy!\n");
		ret = -EBUSY;
		goto sport_config_err;
	}

	ret = sport_config_tx(sport_handle, ITFS, 0xF, 0, (16*16-1));
	if (ret) {
		pr_err("SPORT is busy!\n");
		ret = -EBUSY;
		goto sport_config_err;
	}

	ret = snd_soc_register_dai(&pdev->dev, &bfin_ac97_dai);
	if (ret) {
		pr_err("Failed to register DAI: %d\n", ret);
		goto sport_config_err;
	}

	ac97_sport_handle = sport_handle;

	return 0;

sport_config_err:
	sport_done(sport_handle);
sport_err:
#ifdef CONFIG_SND_BF5XX_HAVE_COLD_RESET
	gpio_free(CONFIG_SND_BF5XX_RESET_GPIO_NUM);
gpio_err:
#endif

	return ret;
}

static int __devexit asoc_bfin_ac97_remove(struct platform_device *pdev)
{
	struct sport_device *sport_handle = platform_get_drvdata(pdev);

	snd_soc_unregister_dai(&pdev->dev);
	sport_done(sport_handle);
#ifdef CONFIG_SND_BF5XX_HAVE_COLD_RESET
	gpio_free(CONFIG_SND_BF5XX_RESET_GPIO_NUM);
#endif

	return 0;
}

static struct platform_driver asoc_bfin_ac97_driver = {
	.driver = {
			.name = "bfin-ac97",
			.owner = THIS_MODULE,
	},

	.probe = asoc_bfin_ac97_probe,
	.remove = __devexit_p(asoc_bfin_ac97_remove),
};

static int __init bfin_ac97_init(void)
{
	return platform_driver_register(&asoc_bfin_ac97_driver);
}
module_init(bfin_ac97_init);

static void __exit bfin_ac97_exit(void)
{
	platform_driver_unregister(&asoc_bfin_ac97_driver);
}
module_exit(bfin_ac97_exit);


MODULE_AUTHOR("Roy Huang");
MODULE_DESCRIPTION("AC97 driver for ADI Blackfin");
MODULE_LICENSE("GPL");
Commit	Line	Data
f2028623 CC	1	/*
	2	* bf5xx-ac97.c -- AC97 support for the ADI blackfin chip.
	3	*
	4	* Author: Roy Huang
	5	* Created: 11th. June 2007
	6	* Copyright: Analog Device Inc.
	7	*
	8	* This program is free software; you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License version 2 as
	10	* published by the Free Software Foundation.
	11	*/
	12
	13	#include <linux/init.h>
	14	#include <linux/module.h>
	15	#include <linux/platform_device.h>
	16	#include <linux/interrupt.h>
	17	#include <linux/wait.h>
	18	#include <linux/delay.h>
5a0e3ad6	19	#include <linux/slab.h>
f2028623 CC	20
	21	#include <sound/core.h>
	22	#include <sound/pcm.h>
	23	#include <sound/ac97_codec.h>
	24	#include <sound/initval.h>
	25	#include <sound/soc.h>
	26
	27	#include <asm/irq.h>
	28	#include <asm/portmux.h>
	29	#include <linux/mutex.h>
	30	#include <linux/gpio.h>
	31
	32	#include "bf5xx-sport.h"
	33	#include "bf5xx-ac97.h"
	34
cf485da1 SZ	35	/* Anomaly notes:
	36	* 05000250 - AD1980 is running in TDM mode and RFS/TFS are generated by SPORT
	37	* contrtoller. But, RFSDIV and TFSDIV are always set to 16*16-1,
	38	* while the max AC97 data size is 13*16. The DIV is always larger
	39	* than data size. AD73311 and ad2602 are not running in TDM mode.
	40	* AD1836 and AD73322 depend on external RFS/TFS only. So, this
	41	* anomaly does not affect blackfin sound drivers.
	42	*/
	43
2c66cb99	44	static struct sport_device *ac97_sport_handle;
f2028623	45
67f854b9 CC	46	void bf5xx_pcm_to_ac97(struct ac97_frame dst, const __u16 src,
67f854b9 CC	47	size_t count, unsigned int chan_mask)
f2028623 CC	48	{
f2028623 CC	49	while (count--) {
67f854b9 CC	50	dst->ac97_tag = TAG_VALID;
	51	if (chan_mask & SP_FL) {
	52	dst->ac97_pcm_r = *src++;
	53	dst->ac97_tag \|= TAG_PCM_RIGHT;
	54	}
	55	if (chan_mask & SP_FR) {
	56	dst->ac97_pcm_l = *src++;
	57	dst->ac97_tag \|= TAG_PCM_LEFT;
	58
	59	}
	60	#if defined(CONFIG_SND_BF5XX_MULTICHAN_SUPPORT)
	61	if (chan_mask & SP_SR) {
	62	dst->ac97_sl = *src++;
	63	dst->ac97_tag \|= TAG_PCM_SL;
	64	}
	65	if (chan_mask & SP_SL) {
	66	dst->ac97_sr = *src++;
	67	dst->ac97_tag \|= TAG_PCM_SR;
	68	}
	69	if (chan_mask & SP_LFE) {
	70	dst->ac97_lfe = *src++;
	71	dst->ac97_tag \|= TAG_PCM_LFE;
	72	}
	73	if (chan_mask & SP_FC) {
	74	dst->ac97_center = *src++;
	75	dst->ac97_tag \|= TAG_PCM_CENTER;
	76	}
	77	#endif
	78	dst++;
f2028623 CC	79	}
	80	}
	81	EXPORT_SYMBOL(bf5xx_pcm_to_ac97);
	82
67f854b9	83	void bf5xx_ac97_to_pcm(const struct ac97_frame src, __u16 dst,
f2028623 CC	84	size_t count)
f2028623 CC	85	{
67f854b9 CC	86	while (count--) {
	87	*(dst++) = src->ac97_pcm_l;
	88	*(dst++) = src->ac97_pcm_r;
	89	src++;
	90	}
f2028623 CC	91	}
	92	EXPORT_SYMBOL(bf5xx_ac97_to_pcm);
	93
	94	static unsigned int sport_tx_curr_frag(struct sport_device *sport)
	95	{
67f854b9	96	return sport->tx_curr_frag = sport_curr_offset_tx(sport) /
f2028623 CC	97	sport->tx_fragsize;
	98	}
	99
	100	static void enqueue_cmd(struct snd_ac97 *ac97, __u16 addr, __u16 data)
	101	{
2c66cb99 BS	102	struct sport_device *sport = ac97_sport_handle;
2c66cb99 BS	103	int *cmd_count = sport->private_data;
f2028623 CC	104	int nextfrag = sport_tx_curr_frag(sport);
	105	struct ac97_frame *nextwrite;
	106
f2028623 CC	107	sport_incfrag(sport, &nextfrag, 1);
f2028623 CC	108
67f854b9	109	nextwrite = (struct ac97_frame *)(sport->tx_buf +
f2028623 CC	110	nextfrag * sport->tx_fragsize);
	111	pr_debug("sport->tx_buf:%p, nextfrag:0x%x nextwrite:%p, cmd_count:%d\n",
	112	sport->tx_buf, nextfrag, nextwrite, cmd_count[nextfrag]);
	113	nextwrite[cmd_count[nextfrag]].ac97_tag \|= TAG_CMD;
	114	nextwrite[cmd_count[nextfrag]].ac97_addr = addr;
	115	nextwrite[cmd_count[nextfrag]].ac97_data = data;
	116	++cmd_count[nextfrag];
	117	pr_debug("ac97_sport: Inserting %02x/%04x into fragment %d\n",
	118	addr >> 8, data, nextfrag);
	119	}
	120
	121	static unsigned short bf5xx_ac97_read(struct snd_ac97 *ac97,
	122	unsigned short reg)
	123	{
2c66cb99	124	struct sport_device *sport_handle = ac97_sport_handle;
f2028623 CC	125	struct ac97_frame out_frame[2], in_frame[2];
	126
	127	pr_debug("%s enter 0x%x\n", __func__, reg);
	128
	129	/* When dma descriptor is enabled, the register should not be read */
	130	if (sport_handle->tx_run \|\| sport_handle->rx_run) {
	131	pr_err("Could you send a mail to cliff.cai@analog.com "
	132	"to report this?\n");
	133	return -EFAULT;
	134	}
	135
	136	memset(&out_frame, 0, 2 * sizeof(struct ac97_frame));
	137	memset(&in_frame, 0, 2 * sizeof(struct ac97_frame));
	138	out_frame[0].ac97_tag = TAG_VALID \| TAG_CMD;
	139	out_frame[0].ac97_addr = ((reg << 8) \| 0x8000);
	140	sport_send_and_recv(sport_handle, (unsigned char *)&out_frame,
	141	(unsigned char *)&in_frame,
	142	2 * sizeof(struct ac97_frame));
	143	return in_frame[1].ac97_data;
	144	}
	145
	146	void bf5xx_ac97_write(struct snd_ac97 *ac97, unsigned short reg,
	147	unsigned short val)
	148	{
2c66cb99 BS	149	struct sport_device *sport_handle = ac97_sport_handle;
2c66cb99 BS	150
f2028623 CC	151	pr_debug("%s enter 0x%x:0x%04x\n", __func__, reg, val);
	152
	153	if (sport_handle->tx_run) {
	154	enqueue_cmd(ac97, (reg << 8), val); /* write */
	155	enqueue_cmd(ac97, (reg << 8) \| 0x8000, 0); /* read back */
	156	} else {
	157	struct ac97_frame frame;
	158	memset(&frame, 0, sizeof(struct ac97_frame));
	159	frame.ac97_tag = TAG_VALID \| TAG_CMD;
	160	frame.ac97_addr = (reg << 8);
	161	frame.ac97_data = val;
	162	sport_send_and_recv(sport_handle, (unsigned char *)&frame, \
	163	NULL, sizeof(struct ac97_frame));
	164	}
	165	}
	166
	167	static void bf5xx_ac97_warm_reset(struct snd_ac97 *ac97)
	168	{
2c66cb99 BS	169	struct sport_device *sport_handle = ac97_sport_handle;
2c66cb99 BS	170	u16 gpio = P_IDENT(sport_handle->pin_req[3]);
f2028623 CC	171
	172	pr_debug("%s enter\n", __func__);
	173
2c66cb99	174	peripheral_free_list(sport_handle->pin_req);
f2028623 CC	175	gpio_request(gpio, "bf5xx-ac97");
	176	gpio_direction_output(gpio, 1);
	177	udelay(2);
	178	gpio_set_value(gpio, 0);
	179	udelay(1);
	180	gpio_free(gpio);
2c66cb99	181	peripheral_request_list(sport_handle->pin_req, "soc-audio");
f2028623 CC	182	}
	183
	184	static void bf5xx_ac97_cold_reset(struct snd_ac97 *ac97)
	185	{
	186	#ifdef CONFIG_SND_BF5XX_HAVE_COLD_RESET
	187	pr_debug("%s enter\n", __func__);
	188
	189	/* It is specified for bf548-ezkit */
	190	gpio_set_value(CONFIG_SND_BF5XX_RESET_GPIO_NUM, 0);
	191	/* Keep reset pin low for 1 ms */
	192	mdelay(1);
	193	gpio_set_value(CONFIG_SND_BF5XX_RESET_GPIO_NUM, 1);
	194	/* Wait for bit clock recover */
	195	mdelay(1);
	196	#else
	197	pr_info("%s: Not implemented\n", __func__);
	198	#endif
	199	}
	200
	201	struct snd_ac97_bus_ops soc_ac97_ops = {
	202	.read = bf5xx_ac97_read,
	203	.write = bf5xx_ac97_write,
	204	.warm_reset = bf5xx_ac97_warm_reset,
	205	.reset = bf5xx_ac97_cold_reset,
	206	};
	207	EXPORT_SYMBOL_GPL(soc_ac97_ops);
	208
	209	#ifdef CONFIG_PM
dc7d7b83	210	static int bf5xx_ac97_suspend(struct snd_soc_dai *dai)
f2028623	211	{
f0fba2ad	212	struct sport_device *sport = snd_soc_dai_get_drvdata(dai);
f2028623 CC	213
	214	pr_debug("%s : sport %d\n", __func__, dai->id);
	215	if (!dai->active)
	216	return 0;
e9c20489	217	if (dai->capture_active)
f2028623	218	sport_rx_stop(sport);
e9c20489	219	if (dai->playback_active)
f2028623 CC	220	sport_tx_stop(sport);
	221	return 0;
	222	}
	223
dc7d7b83	224	static int bf5xx_ac97_resume(struct snd_soc_dai *dai)
f2028623 CC	225	{
f2028623 CC	226	int ret;
f0fba2ad	227	struct sport_device *sport = snd_soc_dai_get_drvdata(dai);
f2028623 CC	228
	229	pr_debug("%s : sport %d\n", __func__, dai->id);
	230	if (!dai->active)
	231	return 0;
	232
79dfc968 CC	233	#if defined(CONFIG_SND_BF5XX_MULTICHAN_SUPPORT)
	234	ret = sport_set_multichannel(sport, 16, 0x3FF, 1);
	235	#else
18d02bc3	236	ret = sport_set_multichannel(sport, 16, 0x1F, 1);
79dfc968	237	#endif
f2028623 CC	238	if (ret) {
	239	pr_err("SPORT is busy!\n");
	240	return -EBUSY;
	241	}
	242
18d02bc3	243	ret = sport_config_rx(sport, IRFS, 0xF, 0, (16*16-1));
f2028623 CC	244	if (ret) {
	245	pr_err("SPORT is busy!\n");
	246	return -EBUSY;
	247	}
	248
18d02bc3	249	ret = sport_config_tx(sport, ITFS, 0xF, 0, (16*16-1));
f2028623 CC	250	if (ret) {
	251	pr_err("SPORT is busy!\n");
	252	return -EBUSY;
	253	}
	254
f2028623 CC	255	return 0;
	256	}
	257
	258	#else
	259	#define bf5xx_ac97_suspend NULL
	260	#define bf5xx_ac97_resume NULL
	261	#endif
	262
2c66cb99 BS	263	static struct snd_soc_dai_driver bfin_ac97_dai = {
	264	.ac97_control = 1,
	265	.suspend = bf5xx_ac97_suspend,
	266	.resume = bf5xx_ac97_resume,
	267	.playback = {
	268	.stream_name = "AC97 Playback",
	269	.channels_min = 2,
	270	#if defined(CONFIG_SND_BF5XX_MULTICHAN_SUPPORT)
	271	.channels_max = 6,
	272	#else
	273	.channels_max = 2,
	274	#endif
	275	.rates = SNDRV_PCM_RATE_48000,
	276	.formats = SNDRV_PCM_FMTBIT_S16_LE, },
	277	.capture = {
	278	.stream_name = "AC97 Capture",
	279	.channels_min = 2,
	280	.channels_max = 2,
	281	.rates = SNDRV_PCM_RATE_48000,
	282	.formats = SNDRV_PCM_FMTBIT_S16_LE, },
	283	};
	284
	285	static int __devinit asoc_bfin_ac97_probe(struct platform_device *pdev)
f2028623	286	{
2c66cb99 BS	287	struct sport_device *sport_handle;
2c66cb99 BS	288	int ret;
f2028623 CC	289
	290	#ifdef CONFIG_SND_BF5XX_HAVE_COLD_RESET
	291	/* Request PB3 as reset pin */
	292	if (gpio_request(CONFIG_SND_BF5XX_RESET_GPIO_NUM, "SND_AD198x RESET")) {
	293	pr_err("Failed to request GPIO_%d for reset\n",
	294	CONFIG_SND_BF5XX_RESET_GPIO_NUM);
67f854b9 CC	295	ret = -1;
67f854b9 CC	296	goto gpio_err;
f2028623 CC	297	}
	298	gpio_direction_output(CONFIG_SND_BF5XX_RESET_GPIO_NUM, 1);
	299	#endif
2c66cb99 BS	300
	301	sport_handle = sport_init(pdev, 2, sizeof(struct ac97_frame),
	302	PAGE_SIZE);
f2028623	303	if (!sport_handle) {
67f854b9 CC	304	ret = -ENODEV;
67f854b9 CC	305	goto sport_err;
f2028623	306	}
2c66cb99	307
f2028623	308	/SPORT works in TDM mode to simulate AC97 transfers/
79dfc968 CC	309	#if defined(CONFIG_SND_BF5XX_MULTICHAN_SUPPORT)
	310	ret = sport_set_multichannel(sport_handle, 16, 0x3FF, 1);
	311	#else
f2028623	312	ret = sport_set_multichannel(sport_handle, 16, 0x1F, 1);
79dfc968	313	#endif
f2028623 CC	314	if (ret) {
f2028623 CC	315	pr_err("SPORT is busy!\n");
67f854b9 CC	316	ret = -EBUSY;
67f854b9 CC	317	goto sport_config_err;
f2028623 CC	318	}
	319
	320	ret = sport_config_rx(sport_handle, IRFS, 0xF, 0, (16*16-1));
	321	if (ret) {
	322	pr_err("SPORT is busy!\n");
67f854b9 CC	323	ret = -EBUSY;
67f854b9 CC	324	goto sport_config_err;
f2028623 CC	325	}
	326
	327	ret = sport_config_tx(sport_handle, ITFS, 0xF, 0, (16*16-1));
	328	if (ret) {
	329	pr_err("SPORT is busy!\n");
67f854b9 CC	330	ret = -EBUSY;
	331	goto sport_config_err;
	332	}
	333
2c66cb99 BS	334	ret = snd_soc_register_dai(&pdev->dev, &bfin_ac97_dai);
	335	if (ret) {
	336	pr_err("Failed to register DAI: %d\n", ret);
	337	goto sport_config_err;
	338	}
	339
	340	ac97_sport_handle = sport_handle;
	341
0cade26e MH	342	return 0;
0cade26e MH	343
67f854b9	344	sport_config_err:
2c66cb99	345	sport_done(sport_handle);
67f854b9	346	sport_err:
f2028623	347	#ifdef CONFIG_SND_BF5XX_HAVE_COLD_RESET
67f854b9	348	gpio_free(CONFIG_SND_BF5XX_RESET_GPIO_NUM);
67f854b9	349	gpio_err:
3465d93a	350	#endif
67f854b9 CC	351
67f854b9 CC	352	return ret;
f2028623 CC	353	}
f2028623 CC	354
2c66cb99	355	static int __devexit asoc_bfin_ac97_remove(struct platform_device *pdev)
f2028623	356	{
2c66cb99 BS	357	struct sport_device *sport_handle = platform_get_drvdata(pdev);
	358
	359	snd_soc_unregister_dai(&pdev->dev);
	360	sport_done(sport_handle);
f2028623 CC	361	#ifdef CONFIG_SND_BF5XX_HAVE_COLD_RESET
	362	gpio_free(CONFIG_SND_BF5XX_RESET_GPIO_NUM);
	363	#endif
f0fba2ad	364
f0fba2ad LG	365	return 0;
	366	}
	367
	368	static struct platform_driver asoc_bfin_ac97_driver = {
	369	.driver = {
	370	.name = "bfin-ac97",
	371	.owner = THIS_MODULE,
	372	},
	373
	374	.probe = asoc_bfin_ac97_probe,
	375	.remove = __devexit_p(asoc_bfin_ac97_remove),
	376	};
	377
c9b3a40f	378	static int __init bfin_ac97_init(void)
3f4b783c	379	{
f0fba2ad	380	return platform_driver_register(&asoc_bfin_ac97_driver);
3f4b783c MB	381	}
	382	module_init(bfin_ac97_init);
	383
	384	static void __exit bfin_ac97_exit(void)
	385	{
f0fba2ad	386	platform_driver_unregister(&asoc_bfin_ac97_driver);
3f4b783c MB	387	}
	388	module_exit(bfin_ac97_exit);
	389
f0fba2ad	390
f2028623 CC	391	MODULE_AUTHOR("Roy Huang");
	392	MODULE_DESCRIPTION("AC97 driver for ADI Blackfin");
	393	MODULE_LICENSE("GPL");