[deliverable/linux.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 int *cmd_count;
static int sport_num = CONFIG_SND_BF5XX_SPORT_NUM;

#define SPORT_REQ(x) \
	[x] = {P_SPORT##x##_TFS, P_SPORT##x##_DTPRI, P_SPORT##x##_TSCLK, \
	       P_SPORT##x##_RFS, P_SPORT##x##_DRPRI, P_SPORT##x##_RSCLK, 0}
static u16 sport_req[][7] = {
#ifdef SPORT0_TCR1
	SPORT_REQ(0),
#endif
#ifdef SPORT1_TCR1
	SPORT_REQ(1),
#endif
#ifdef SPORT2_TCR1
	SPORT_REQ(2),
#endif
#ifdef SPORT3_TCR1
	SPORT_REQ(3),
#endif
};

#define SPORT_PARAMS(x) \
	[x] = { \
		.dma_rx_chan = CH_SPORT##x##_RX, \
		.dma_tx_chan = CH_SPORT##x##_TX, \
		.err_irq     = IRQ_SPORT##x##_ERROR, \
		.regs        = (struct sport_register *)SPORT##x##_TCR1, \
	}
static struct sport_param sport_params[4] = {
#ifdef SPORT0_TCR1
	SPORT_PARAMS(0),
#endif
#ifdef SPORT1_TCR1
	SPORT_PARAMS(1),
#endif
#ifdef SPORT2_TCR1
	SPORT_PARAMS(2),
#endif
#ifdef SPORT3_TCR1
	SPORT_PARAMS(3),
#endif
};

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 = sport_handle;
	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 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)
{
	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)
{
#if defined(CONFIG_BF54x) || defined(CONFIG_BF561) || \
 (defined(BF537_FAMILY) && (CONFIG_SND_BF5XX_SPORT_NUM == 1))

#define CONCAT(a, b, c) a ## b ## c
#define BFIN_SPORT_RFS(x) CONCAT(P_SPORT, x, _RFS)

	u16 per = BFIN_SPORT_RFS(CONFIG_SND_BF5XX_SPORT_NUM);
	u16 gpio = P_IDENT(BFIN_SPORT_RFS(CONFIG_SND_BF5XX_SPORT_NUM));

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

	peripheral_free(per);
	gpio_request(gpio, "bf5xx-ac97");
	gpio_direction_output(gpio, 1);
	udelay(2);
	gpio_set_value(gpio, 0);
	udelay(1);
	gpio_free(gpio);
	peripheral_request(per, "soc-audio");
#else
	pr_info("%s: Not implemented\n", __func__);
#endif
}

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 int bf5xx_ac97_probe(struct snd_soc_dai *dai)
{
	int ret = 0;
	cmd_count = (int *)get_zeroed_page(GFP_KERNEL);
	if (cmd_count == NULL)
		return -ENOMEM;

	if (peripheral_request_list(sport_req[sport_num], "soc-audio")) {
		pr_err("Requesting Peripherals failed\n");
		ret =  -EFAULT;
		goto peripheral_err;
	}

#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(&sport_params[sport_num], 2, \
			sizeof(struct ac97_frame), NULL);
	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;
	}

	return 0;

sport_config_err:
	kfree(sport_handle);
sport_err:
#ifdef CONFIG_SND_BF5XX_HAVE_COLD_RESET
	gpio_free(CONFIG_SND_BF5XX_RESET_GPIO_NUM);
gpio_err:
#endif
	peripheral_free_list(sport_req[sport_num]);
peripheral_err:
	free_page((unsigned long)cmd_count);
	cmd_count = NULL;

	return ret;
}

static int bf5xx_ac97_remove(struct snd_soc_dai *dai)
{
	free_page((unsigned long)cmd_count);
	cmd_count = NULL;
	peripheral_free_list(sport_req[sport_num]);
#ifdef CONFIG_SND_BF5XX_HAVE_COLD_RESET
	gpio_free(CONFIG_SND_BF5XX_RESET_GPIO_NUM);
#endif
	return 0;
}

struct snd_soc_dai_driver bfin_ac97_dai = {
	.ac97_control = 1,
	.probe = bf5xx_ac97_probe,
	.remove = bf5xx_ac97_remove,
	.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, },
};
EXPORT_SYMBOL_GPL(bfin_ac97_dai);

static __devinit int asoc_bfin_ac97_probe(struct platform_device *pdev)
{
	return snd_soc_register_dai(&pdev->dev, &bfin_ac97_dai);
}

static int __devexit asoc_bfin_ac97_remove(struct platform_device *pdev)
{
	snd_soc_unregister_dai(&pdev->dev);
	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
f2028623 CC	44	static int *cmd_count;
	45	static int sport_num = CONFIG_SND_BF5XX_SPORT_NUM;
	46
92a950ff MF	47	#define SPORT_REQ(x) \
	48	[x] = {P_SPORT##x##_TFS, P_SPORT##x##_DTPRI, P_SPORT##x##_TSCLK, \
	49	P_SPORT##x##_RFS, P_SPORT##x##_DRPRI, P_SPORT##x##_RSCLK, 0}
67f854b9	50	static u16 sport_req[][7] = {
92a950ff MF	51	#ifdef SPORT0_TCR1
92a950ff MF	52	SPORT_REQ(0),
67f854b9	53	#endif
92a950ff MF	54	#ifdef SPORT1_TCR1
92a950ff MF	55	SPORT_REQ(1),
67f854b9	56	#endif
92a950ff MF	57	#ifdef SPORT2_TCR1
92a950ff MF	58	SPORT_REQ(2),
67f854b9	59	#endif
92a950ff MF	60	#ifdef SPORT3_TCR1
	61	SPORT_REQ(3),
	62	#endif
	63	};
67f854b9	64
92a950ff MF	65	#define SPORT_PARAMS(x) \
	66	[x] = { \
	67	.dma_rx_chan = CH_SPORT##x##_RX, \
	68	.dma_tx_chan = CH_SPORT##x##_TX, \
	69	.err_irq = IRQ_SPORT##x##_ERROR, \
	70	.regs = (struct sport_register *)SPORT##x##_TCR1, \
	71	}
f2028623	72	static struct sport_param sport_params[4] = {
92a950ff MF	73	#ifdef SPORT0_TCR1
92a950ff MF	74	SPORT_PARAMS(0),
67f854b9	75	#endif
92a950ff MF	76	#ifdef SPORT1_TCR1
92a950ff MF	77	SPORT_PARAMS(1),
67f854b9	78	#endif
92a950ff MF	79	#ifdef SPORT2_TCR1
	80	SPORT_PARAMS(2),
	81	#endif
	82	#ifdef SPORT3_TCR1
	83	SPORT_PARAMS(3),
f2028623	84	#endif
67f854b9	85	};
f2028623	86
67f854b9 CC	87	void bf5xx_pcm_to_ac97(struct ac97_frame dst, const __u16 src,
67f854b9 CC	88	size_t count, unsigned int chan_mask)
f2028623 CC	89	{
f2028623 CC	90	while (count--) {
67f854b9 CC	91	dst->ac97_tag = TAG_VALID;
	92	if (chan_mask & SP_FL) {
	93	dst->ac97_pcm_r = *src++;
	94	dst->ac97_tag \|= TAG_PCM_RIGHT;
	95	}
	96	if (chan_mask & SP_FR) {
	97	dst->ac97_pcm_l = *src++;
	98	dst->ac97_tag \|= TAG_PCM_LEFT;
	99
	100	}
	101	#if defined(CONFIG_SND_BF5XX_MULTICHAN_SUPPORT)
	102	if (chan_mask & SP_SR) {
	103	dst->ac97_sl = *src++;
	104	dst->ac97_tag \|= TAG_PCM_SL;
	105	}
	106	if (chan_mask & SP_SL) {
	107	dst->ac97_sr = *src++;
	108	dst->ac97_tag \|= TAG_PCM_SR;
	109	}
	110	if (chan_mask & SP_LFE) {
	111	dst->ac97_lfe = *src++;
	112	dst->ac97_tag \|= TAG_PCM_LFE;
	113	}
	114	if (chan_mask & SP_FC) {
	115	dst->ac97_center = *src++;
	116	dst->ac97_tag \|= TAG_PCM_CENTER;
	117	}
	118	#endif
	119	dst++;
f2028623 CC	120	}
	121	}
	122	EXPORT_SYMBOL(bf5xx_pcm_to_ac97);
	123
67f854b9	124	void bf5xx_ac97_to_pcm(const struct ac97_frame src, __u16 dst,
f2028623 CC	125	size_t count)
f2028623 CC	126	{
67f854b9 CC	127	while (count--) {
	128	*(dst++) = src->ac97_pcm_l;
	129	*(dst++) = src->ac97_pcm_r;
	130	src++;
	131	}
f2028623 CC	132	}
	133	EXPORT_SYMBOL(bf5xx_ac97_to_pcm);
	134
	135	static unsigned int sport_tx_curr_frag(struct sport_device *sport)
	136	{
67f854b9	137	return sport->tx_curr_frag = sport_curr_offset_tx(sport) /
f2028623 CC	138	sport->tx_fragsize;
	139	}
	140
	141	static void enqueue_cmd(struct snd_ac97 *ac97, __u16 addr, __u16 data)
	142	{
	143	struct sport_device *sport = sport_handle;
	144	int nextfrag = sport_tx_curr_frag(sport);
	145	struct ac97_frame *nextwrite;
	146
f2028623 CC	147	sport_incfrag(sport, &nextfrag, 1);
f2028623 CC	148
67f854b9	149	nextwrite = (struct ac97_frame *)(sport->tx_buf +
f2028623 CC	150	nextfrag * sport->tx_fragsize);
	151	pr_debug("sport->tx_buf:%p, nextfrag:0x%x nextwrite:%p, cmd_count:%d\n",
	152	sport->tx_buf, nextfrag, nextwrite, cmd_count[nextfrag]);
	153	nextwrite[cmd_count[nextfrag]].ac97_tag \|= TAG_CMD;
	154	nextwrite[cmd_count[nextfrag]].ac97_addr = addr;
	155	nextwrite[cmd_count[nextfrag]].ac97_data = data;
	156	++cmd_count[nextfrag];
	157	pr_debug("ac97_sport: Inserting %02x/%04x into fragment %d\n",
	158	addr >> 8, data, nextfrag);
	159	}
	160
	161	static unsigned short bf5xx_ac97_read(struct snd_ac97 *ac97,
	162	unsigned short reg)
	163	{
	164	struct ac97_frame out_frame[2], in_frame[2];
	165
	166	pr_debug("%s enter 0x%x\n", __func__, reg);
	167
	168	/* When dma descriptor is enabled, the register should not be read */
	169	if (sport_handle->tx_run \|\| sport_handle->rx_run) {
	170	pr_err("Could you send a mail to cliff.cai@analog.com "
	171	"to report this?\n");
	172	return -EFAULT;
	173	}
	174
	175	memset(&out_frame, 0, 2 * sizeof(struct ac97_frame));
	176	memset(&in_frame, 0, 2 * sizeof(struct ac97_frame));
	177	out_frame[0].ac97_tag = TAG_VALID \| TAG_CMD;
	178	out_frame[0].ac97_addr = ((reg << 8) \| 0x8000);
	179	sport_send_and_recv(sport_handle, (unsigned char *)&out_frame,
	180	(unsigned char *)&in_frame,
	181	2 * sizeof(struct ac97_frame));
	182	return in_frame[1].ac97_data;
	183	}
	184
	185	void bf5xx_ac97_write(struct snd_ac97 *ac97, unsigned short reg,
	186	unsigned short val)
	187	{
	188	pr_debug("%s enter 0x%x:0x%04x\n", __func__, reg, val);
	189
	190	if (sport_handle->tx_run) {
	191	enqueue_cmd(ac97, (reg << 8), val); /* write */
	192	enqueue_cmd(ac97, (reg << 8) \| 0x8000, 0); /* read back */
	193	} else {
	194	struct ac97_frame frame;
	195	memset(&frame, 0, sizeof(struct ac97_frame));
	196	frame.ac97_tag = TAG_VALID \| TAG_CMD;
	197	frame.ac97_addr = (reg << 8);
	198	frame.ac97_data = val;
	199	sport_send_and_recv(sport_handle, (unsigned char *)&frame, \
	200	NULL, sizeof(struct ac97_frame));
	201	}
	202	}
	203
	204	static void bf5xx_ac97_warm_reset(struct snd_ac97 *ac97)
	205	{
	206	#if defined(CONFIG_BF54x) \|\| defined(CONFIG_BF561) \|\| \
	207	(defined(BF537_FAMILY) && (CONFIG_SND_BF5XX_SPORT_NUM == 1))
	208
	209	#define CONCAT(a, b, c) a ## b ## c
	210	#define BFIN_SPORT_RFS(x) CONCAT(P_SPORT, x, _RFS)
	211
	212	u16 per = BFIN_SPORT_RFS(CONFIG_SND_BF5XX_SPORT_NUM);
	213	u16 gpio = P_IDENT(BFIN_SPORT_RFS(CONFIG_SND_BF5XX_SPORT_NUM));
214
215	pr_debug("%s enter\n", __func__);
216
217	peripheral_free(per);
218	gpio_request(gpio, "bf5xx-ac97");
219	gpio_direction_output(gpio, 1);
220	udelay(2);
221	gpio_set_value(gpio, 0);
222	udelay(1);
223	gpio_free(gpio);
224	peripheral_request(per, "soc-audio");
225	#else
226	pr_info("%s: Not implemented\n", __func__);
227	#endif
228	}
229
230	static void bf5xx_ac97_cold_reset(struct snd_ac97 *ac97)
231	{
232	#ifdef CONFIG_SND_BF5XX_HAVE_COLD_RESET
233	pr_debug("%s enter\n", __func__);
234
235	/* It is specified for bf548-ezkit */
236	gpio_set_value(CONFIG_SND_BF5XX_RESET_GPIO_NUM, 0);
237	/* Keep reset pin low for 1 ms */
238	mdelay(1);
239	gpio_set_value(CONFIG_SND_BF5XX_RESET_GPIO_NUM, 1);
240	/* Wait for bit clock recover */
241	mdelay(1);
242	#else
243	pr_info("%s: Not implemented\n", __func__);
244	#endif
245	}
246
247	struct snd_ac97_bus_ops soc_ac97_ops = {
248	.read = bf5xx_ac97_read,
249	.write = bf5xx_ac97_write,
250	.warm_reset = bf5xx_ac97_warm_reset,
251	.reset = bf5xx_ac97_cold_reset,
252	};
253	EXPORT_SYMBOL_GPL(soc_ac97_ops);
254
255	#ifdef CONFIG_PM
dc7d7b83	256	static int bf5xx_ac97_suspend(struct snd_soc_dai *dai)
f2028623	257	{
f0fba2ad	258	struct sport_device *sport = snd_soc_dai_get_drvdata(dai);
f2028623 CC	259
	260	pr_debug("%s : sport %d\n", __func__, dai->id);
	261	if (!dai->active)
	262	return 0;
	263	if (dai->capture.active)
	264	sport_rx_stop(sport);
	265	if (dai->playback.active)
	266	sport_tx_stop(sport);
	267	return 0;
	268	}
	269
dc7d7b83	270	static int bf5xx_ac97_resume(struct snd_soc_dai *dai)
f2028623 CC	271	{
f2028623 CC	272	int ret;
f0fba2ad	273	struct sport_device *sport = snd_soc_dai_get_drvdata(dai);
f2028623 CC	274
	275	pr_debug("%s : sport %d\n", __func__, dai->id);
	276	if (!dai->active)
	277	return 0;
	278
79dfc968 CC	279	#if defined(CONFIG_SND_BF5XX_MULTICHAN_SUPPORT)
	280	ret = sport_set_multichannel(sport, 16, 0x3FF, 1);
	281	#else
18d02bc3	282	ret = sport_set_multichannel(sport, 16, 0x1F, 1);
79dfc968	283	#endif
f2028623 CC	284	if (ret) {
	285	pr_err("SPORT is busy!\n");
	286	return -EBUSY;
	287	}
	288
18d02bc3	289	ret = sport_config_rx(sport, IRFS, 0xF, 0, (16*16-1));
f2028623 CC	290	if (ret) {
	291	pr_err("SPORT is busy!\n");
	292	return -EBUSY;
	293	}
	294
18d02bc3	295	ret = sport_config_tx(sport, ITFS, 0xF, 0, (16*16-1));
f2028623 CC	296	if (ret) {
	297	pr_err("SPORT is busy!\n");
	298	return -EBUSY;
	299	}
	300
f2028623 CC	301	return 0;
	302	}
	303
	304	#else
	305	#define bf5xx_ac97_suspend NULL
	306	#define bf5xx_ac97_resume NULL
	307	#endif
	308
f0fba2ad	309	static int bf5xx_ac97_probe(struct snd_soc_dai *dai)
f2028623	310	{
67f854b9	311	int ret = 0;
f2028623 CC	312	cmd_count = (int *)get_zeroed_page(GFP_KERNEL);
	313	if (cmd_count == NULL)
	314	return -ENOMEM;
	315
92a950ff	316	if (peripheral_request_list(sport_req[sport_num], "soc-audio")) {
f2028623	317	pr_err("Requesting Peripherals failed\n");
67f854b9 CC	318	ret = -EFAULT;
67f854b9 CC	319	goto peripheral_err;
92a950ff	320	}
f2028623 CC	321
	322	#ifdef CONFIG_SND_BF5XX_HAVE_COLD_RESET
	323	/* Request PB3 as reset pin */
	324	if (gpio_request(CONFIG_SND_BF5XX_RESET_GPIO_NUM, "SND_AD198x RESET")) {
	325	pr_err("Failed to request GPIO_%d for reset\n",
	326	CONFIG_SND_BF5XX_RESET_GPIO_NUM);
67f854b9 CC	327	ret = -1;
67f854b9 CC	328	goto gpio_err;
f2028623 CC	329	}
	330	gpio_direction_output(CONFIG_SND_BF5XX_RESET_GPIO_NUM, 1);
	331	#endif
	332	sport_handle = sport_init(&sport_params[sport_num], 2, \
	333	sizeof(struct ac97_frame), NULL);
	334	if (!sport_handle) {
67f854b9 CC	335	ret = -ENODEV;
67f854b9 CC	336	goto sport_err;
f2028623 CC	337	}
f2028623 CC	338	/SPORT works in TDM mode to simulate AC97 transfers/
79dfc968 CC	339	#if defined(CONFIG_SND_BF5XX_MULTICHAN_SUPPORT)
	340	ret = sport_set_multichannel(sport_handle, 16, 0x3FF, 1);
	341	#else
f2028623	342	ret = sport_set_multichannel(sport_handle, 16, 0x1F, 1);
79dfc968	343	#endif
f2028623 CC	344	if (ret) {
f2028623 CC	345	pr_err("SPORT is busy!\n");
67f854b9 CC	346	ret = -EBUSY;
67f854b9 CC	347	goto sport_config_err;
f2028623 CC	348	}
	349
	350	ret = sport_config_rx(sport_handle, IRFS, 0xF, 0, (16*16-1));
	351	if (ret) {
	352	pr_err("SPORT is busy!\n");
67f854b9 CC	353	ret = -EBUSY;
67f854b9 CC	354	goto sport_config_err;
f2028623 CC	355	}
	356
	357	ret = sport_config_tx(sport_handle, ITFS, 0xF, 0, (16*16-1));
	358	if (ret) {
	359	pr_err("SPORT is busy!\n");
67f854b9 CC	360	ret = -EBUSY;
	361	goto sport_config_err;
	362	}
	363
0cade26e MH	364	return 0;
0cade26e MH	365
67f854b9 CC	366	sport_config_err:
	367	kfree(sport_handle);
	368	sport_err:
f2028623	369	#ifdef CONFIG_SND_BF5XX_HAVE_COLD_RESET
67f854b9	370	gpio_free(CONFIG_SND_BF5XX_RESET_GPIO_NUM);
67f854b9	371	gpio_err:
3465d93a	372	#endif
92a950ff	373	peripheral_free_list(sport_req[sport_num]);
67f854b9 CC	374	peripheral_err:
	375	free_page((unsigned long)cmd_count);
	376	cmd_count = NULL;
	377
	378	return ret;
f2028623 CC	379	}
f2028623 CC	380
f0fba2ad	381	static int bf5xx_ac97_remove(struct snd_soc_dai *dai)
f2028623 CC	382	{
	383	free_page((unsigned long)cmd_count);
	384	cmd_count = NULL;
92a950ff	385	peripheral_free_list(sport_req[sport_num]);
f2028623 CC	386	#ifdef CONFIG_SND_BF5XX_HAVE_COLD_RESET
	387	gpio_free(CONFIG_SND_BF5XX_RESET_GPIO_NUM);
	388	#endif
f0fba2ad	389	return 0;
f2028623 CC	390	}
f2028623 CC	391
f0fba2ad	392	struct snd_soc_dai_driver bfin_ac97_dai = {
3ba9e10a	393	.ac97_control = 1,
f2028623 CC	394	.probe = bf5xx_ac97_probe,
	395	.remove = bf5xx_ac97_remove,
	396	.suspend = bf5xx_ac97_suspend,
	397	.resume = bf5xx_ac97_resume,
	398	.playback = {
	399	.stream_name = "AC97 Playback",
	400	.channels_min = 2,
67f854b9 CC	401	#if defined(CONFIG_SND_BF5XX_MULTICHAN_SUPPORT)
	402	.channels_max = 6,
	403	#else
f2028623	404	.channels_max = 2,
67f854b9	405	#endif
f2028623 CC	406	.rates = SNDRV_PCM_RATE_48000,
	407	.formats = SNDRV_PCM_FMTBIT_S16_LE, },
	408	.capture = {
	409	.stream_name = "AC97 Capture",
	410	.channels_min = 2,
	411	.channels_max = 2,
	412	.rates = SNDRV_PCM_RATE_48000,
	413	.formats = SNDRV_PCM_FMTBIT_S16_LE, },
	414	};
	415	EXPORT_SYMBOL_GPL(bfin_ac97_dai);
	416
f0fba2ad LG	417	static __devinit int asoc_bfin_ac97_probe(struct platform_device *pdev)
	418	{
	419	return snd_soc_register_dai(&pdev->dev, &bfin_ac97_dai);
	420	}
	421
	422	static int __devexit asoc_bfin_ac97_remove(struct platform_device *pdev)
	423	{
	424	snd_soc_unregister_dai(&pdev->dev);
	425	return 0;
	426	}
	427
	428	static struct platform_driver asoc_bfin_ac97_driver = {
	429	.driver = {
	430	.name = "bfin-ac97",
	431	.owner = THIS_MODULE,
	432	},
	433
	434	.probe = asoc_bfin_ac97_probe,
	435	.remove = __devexit_p(asoc_bfin_ac97_remove),
	436	};
	437
c9b3a40f	438	static int __init bfin_ac97_init(void)
3f4b783c	439	{
f0fba2ad	440	return platform_driver_register(&asoc_bfin_ac97_driver);
3f4b783c MB	441	}
	442	module_init(bfin_ac97_init);
	443
	444	static void __exit bfin_ac97_exit(void)
	445	{
f0fba2ad	446	platform_driver_unregister(&asoc_bfin_ac97_driver);
3f4b783c MB	447	}
	448	module_exit(bfin_ac97_exit);
	449
f0fba2ad	450
f2028623 CC	451	MODULE_AUTHOR("Roy Huang");
	452	MODULE_DESCRIPTION("AC97 driver for ADI Blackfin");
	453	MODULE_LICENSE("GPL");