[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 <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"

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 =
		(struct sport_device *)dai->private_data;

	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 =
		(struct sport_device *)dai->private_data;

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

	ret = sport_set_multichannel(sport_handle, 16, 0x1F, 1);
	if (ret) {
		pr_err("SPORT is busy!\n");
		return -EBUSY;
	}

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

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

	if (dai->capture.active)
		sport_rx_start(sport);
	if (dai->playback.active)
		sport_tx_start(sport);
	return 0;
}

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

static int bf5xx_ac97_probe(struct platform_device *pdev,
			    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*/
	ret = sport_set_multichannel(sport_handle, 16, 0x1F, 1);
	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 void bf5xx_ac97_remove(struct platform_device *pdev,
			      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
}

struct snd_soc_dai bfin_ac97_dai = {
	.name = "bf5xx-ac97",
	.id = 0,
	.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 int __init bfin_ac97_init(void)
{
	return snd_soc_register_dai(&bfin_ac97_dai);
}
module_init(bfin_ac97_init);

static void __exit bfin_ac97_exit(void)
{
	snd_soc_unregister_dai(&bfin_ac97_dai);
}
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>
	19
	20	#include <sound/core.h>
	21	#include <sound/pcm.h>
	22	#include <sound/ac97_codec.h>
	23	#include <sound/initval.h>
	24	#include <sound/soc.h>
	25
	26	#include <asm/irq.h>
	27	#include <asm/portmux.h>
	28	#include <linux/mutex.h>
	29	#include <linux/gpio.h>
	30
	31	#include "bf5xx-sport.h"
	32	#include "bf5xx-ac97.h"
	33
f2028623 CC	34	static int *cmd_count;
	35	static int sport_num = CONFIG_SND_BF5XX_SPORT_NUM;
	36
92a950ff MF	37	#define SPORT_REQ(x) \
	38	[x] = {P_SPORT##x##_TFS, P_SPORT##x##_DTPRI, P_SPORT##x##_TSCLK, \
	39	P_SPORT##x##_RFS, P_SPORT##x##_DRPRI, P_SPORT##x##_RSCLK, 0}
67f854b9	40	static u16 sport_req[][7] = {
92a950ff MF	41	#ifdef SPORT0_TCR1
92a950ff MF	42	SPORT_REQ(0),
67f854b9	43	#endif
92a950ff MF	44	#ifdef SPORT1_TCR1
92a950ff MF	45	SPORT_REQ(1),
67f854b9	46	#endif
92a950ff MF	47	#ifdef SPORT2_TCR1
92a950ff MF	48	SPORT_REQ(2),
67f854b9	49	#endif
92a950ff MF	50	#ifdef SPORT3_TCR1
	51	SPORT_REQ(3),
	52	#endif
	53	};
67f854b9	54
92a950ff MF	55	#define SPORT_PARAMS(x) \
	56	[x] = { \
	57	.dma_rx_chan = CH_SPORT##x##_RX, \
	58	.dma_tx_chan = CH_SPORT##x##_TX, \
	59	.err_irq = IRQ_SPORT##x##_ERROR, \
	60	.regs = (struct sport_register *)SPORT##x##_TCR1, \
	61	}
f2028623	62	static struct sport_param sport_params[4] = {
92a950ff MF	63	#ifdef SPORT0_TCR1
92a950ff MF	64	SPORT_PARAMS(0),
67f854b9	65	#endif
92a950ff MF	66	#ifdef SPORT1_TCR1
92a950ff MF	67	SPORT_PARAMS(1),
67f854b9	68	#endif
92a950ff MF	69	#ifdef SPORT2_TCR1
	70	SPORT_PARAMS(2),
	71	#endif
	72	#ifdef SPORT3_TCR1
	73	SPORT_PARAMS(3),
f2028623	74	#endif
67f854b9	75	};
f2028623	76
67f854b9 CC	77	void bf5xx_pcm_to_ac97(struct ac97_frame dst, const __u16 src,
67f854b9 CC	78	size_t count, unsigned int chan_mask)
f2028623 CC	79	{
f2028623 CC	80	while (count--) {
67f854b9 CC	81	dst->ac97_tag = TAG_VALID;
	82	if (chan_mask & SP_FL) {
	83	dst->ac97_pcm_r = *src++;
	84	dst->ac97_tag \|= TAG_PCM_RIGHT;
	85	}
	86	if (chan_mask & SP_FR) {
	87	dst->ac97_pcm_l = *src++;
	88	dst->ac97_tag \|= TAG_PCM_LEFT;
	89
	90	}
	91	#if defined(CONFIG_SND_BF5XX_MULTICHAN_SUPPORT)
	92	if (chan_mask & SP_SR) {
	93	dst->ac97_sl = *src++;
	94	dst->ac97_tag \|= TAG_PCM_SL;
	95	}
	96	if (chan_mask & SP_SL) {
	97	dst->ac97_sr = *src++;
	98	dst->ac97_tag \|= TAG_PCM_SR;
	99	}
	100	if (chan_mask & SP_LFE) {
	101	dst->ac97_lfe = *src++;
	102	dst->ac97_tag \|= TAG_PCM_LFE;
	103	}
	104	if (chan_mask & SP_FC) {
	105	dst->ac97_center = *src++;
	106	dst->ac97_tag \|= TAG_PCM_CENTER;
	107	}
	108	#endif
	109	dst++;
f2028623 CC	110	}
	111	}
	112	EXPORT_SYMBOL(bf5xx_pcm_to_ac97);
	113
67f854b9	114	void bf5xx_ac97_to_pcm(const struct ac97_frame src, __u16 dst,
f2028623 CC	115	size_t count)
f2028623 CC	116	{
67f854b9 CC	117	while (count--) {
	118	*(dst++) = src->ac97_pcm_l;
	119	*(dst++) = src->ac97_pcm_r;
	120	src++;
	121	}
f2028623 CC	122	}
	123	EXPORT_SYMBOL(bf5xx_ac97_to_pcm);
	124
	125	static unsigned int sport_tx_curr_frag(struct sport_device *sport)
	126	{
67f854b9	127	return sport->tx_curr_frag = sport_curr_offset_tx(sport) /
f2028623 CC	128	sport->tx_fragsize;
	129	}
	130
	131	static void enqueue_cmd(struct snd_ac97 *ac97, __u16 addr, __u16 data)
	132	{
	133	struct sport_device *sport = sport_handle;
	134	int nextfrag = sport_tx_curr_frag(sport);
	135	struct ac97_frame *nextwrite;
	136
f2028623 CC	137	sport_incfrag(sport, &nextfrag, 1);
f2028623 CC	138
67f854b9	139	nextwrite = (struct ac97_frame *)(sport->tx_buf +
f2028623 CC	140	nextfrag * sport->tx_fragsize);
	141	pr_debug("sport->tx_buf:%p, nextfrag:0x%x nextwrite:%p, cmd_count:%d\n",
	142	sport->tx_buf, nextfrag, nextwrite, cmd_count[nextfrag]);
	143	nextwrite[cmd_count[nextfrag]].ac97_tag \|= TAG_CMD;
	144	nextwrite[cmd_count[nextfrag]].ac97_addr = addr;
	145	nextwrite[cmd_count[nextfrag]].ac97_data = data;
	146	++cmd_count[nextfrag];
	147	pr_debug("ac97_sport: Inserting %02x/%04x into fragment %d\n",
	148	addr >> 8, data, nextfrag);
	149	}
	150
	151	static unsigned short bf5xx_ac97_read(struct snd_ac97 *ac97,
	152	unsigned short reg)
	153	{
	154	struct ac97_frame out_frame[2], in_frame[2];
	155
	156	pr_debug("%s enter 0x%x\n", __func__, reg);
	157
	158	/* When dma descriptor is enabled, the register should not be read */
	159	if (sport_handle->tx_run \|\| sport_handle->rx_run) {
	160	pr_err("Could you send a mail to cliff.cai@analog.com "
	161	"to report this?\n");
	162	return -EFAULT;
	163	}
	164
	165	memset(&out_frame, 0, 2 * sizeof(struct ac97_frame));
	166	memset(&in_frame, 0, 2 * sizeof(struct ac97_frame));
	167	out_frame[0].ac97_tag = TAG_VALID \| TAG_CMD;
	168	out_frame[0].ac97_addr = ((reg << 8) \| 0x8000);
	169	sport_send_and_recv(sport_handle, (unsigned char *)&out_frame,
	170	(unsigned char *)&in_frame,
	171	2 * sizeof(struct ac97_frame));
	172	return in_frame[1].ac97_data;
	173	}
	174
	175	void bf5xx_ac97_write(struct snd_ac97 *ac97, unsigned short reg,
	176	unsigned short val)
	177	{
	178	pr_debug("%s enter 0x%x:0x%04x\n", __func__, reg, val);
	179
	180	if (sport_handle->tx_run) {
	181	enqueue_cmd(ac97, (reg << 8), val); /* write */
	182	enqueue_cmd(ac97, (reg << 8) \| 0x8000, 0); /* read back */
	183	} else {
	184	struct ac97_frame frame;
	185	memset(&frame, 0, sizeof(struct ac97_frame));
	186	frame.ac97_tag = TAG_VALID \| TAG_CMD;
	187	frame.ac97_addr = (reg << 8);
	188	frame.ac97_data = val;
	189	sport_send_and_recv(sport_handle, (unsigned char *)&frame, \
	190	NULL, sizeof(struct ac97_frame));
	191	}
	192	}
	193
	194	static void bf5xx_ac97_warm_reset(struct snd_ac97 *ac97)
	195	{
	196	#if defined(CONFIG_BF54x) \|\| defined(CONFIG_BF561) \|\| \
	197	(defined(BF537_FAMILY) && (CONFIG_SND_BF5XX_SPORT_NUM == 1))
	198
	199	#define CONCAT(a, b, c) a ## b ## c
	200	#define BFIN_SPORT_RFS(x) CONCAT(P_SPORT, x, _RFS)
	201
	202	u16 per = BFIN_SPORT_RFS(CONFIG_SND_BF5XX_SPORT_NUM);
	203	u16 gpio = P_IDENT(BFIN_SPORT_RFS(CONFIG_SND_BF5XX_SPORT_NUM));
204
205	pr_debug("%s enter\n", __func__);
206
207	peripheral_free(per);
208	gpio_request(gpio, "bf5xx-ac97");
209	gpio_direction_output(gpio, 1);
210	udelay(2);
211	gpio_set_value(gpio, 0);
212	udelay(1);
213	gpio_free(gpio);
214	peripheral_request(per, "soc-audio");
215	#else
216	pr_info("%s: Not implemented\n", __func__);
217	#endif
218	}
219
220	static void bf5xx_ac97_cold_reset(struct snd_ac97 *ac97)
221	{
222	#ifdef CONFIG_SND_BF5XX_HAVE_COLD_RESET
223	pr_debug("%s enter\n", __func__);
224
225	/* It is specified for bf548-ezkit */
226	gpio_set_value(CONFIG_SND_BF5XX_RESET_GPIO_NUM, 0);
227	/* Keep reset pin low for 1 ms */
228	mdelay(1);
229	gpio_set_value(CONFIG_SND_BF5XX_RESET_GPIO_NUM, 1);
230	/* Wait for bit clock recover */
231	mdelay(1);
232	#else
233	pr_info("%s: Not implemented\n", __func__);
234	#endif
235	}
236
237	struct snd_ac97_bus_ops soc_ac97_ops = {
238	.read = bf5xx_ac97_read,
239	.write = bf5xx_ac97_write,
240	.warm_reset = bf5xx_ac97_warm_reset,
241	.reset = bf5xx_ac97_cold_reset,
242	};
243	EXPORT_SYMBOL_GPL(soc_ac97_ops);
244
245	#ifdef CONFIG_PM
dc7d7b83	246	static int bf5xx_ac97_suspend(struct snd_soc_dai *dai)
f2028623 CC	247	{
	248	struct sport_device *sport =
	249	(struct sport_device *)dai->private_data;
	250
	251	pr_debug("%s : sport %d\n", __func__, dai->id);
	252	if (!dai->active)
	253	return 0;
	254	if (dai->capture.active)
	255	sport_rx_stop(sport);
	256	if (dai->playback.active)
	257	sport_tx_stop(sport);
	258	return 0;
	259	}
	260
dc7d7b83	261	static int bf5xx_ac97_resume(struct snd_soc_dai *dai)
f2028623 CC	262	{
	263	int ret;
	264	struct sport_device *sport =
	265	(struct sport_device *)dai->private_data;
	266
	267	pr_debug("%s : sport %d\n", __func__, dai->id);
	268	if (!dai->active)
	269	return 0;
	270
	271	ret = sport_set_multichannel(sport_handle, 16, 0x1F, 1);
	272	if (ret) {
	273	pr_err("SPORT is busy!\n");
	274	return -EBUSY;
	275	}
	276
	277	ret = sport_config_rx(sport_handle, IRFS, 0xF, 0, (16*16-1));
	278	if (ret) {
	279	pr_err("SPORT is busy!\n");
	280	return -EBUSY;
	281	}
	282
	283	ret = sport_config_tx(sport_handle, ITFS, 0xF, 0, (16*16-1));
	284	if (ret) {
	285	pr_err("SPORT is busy!\n");
	286	return -EBUSY;
	287	}
	288
	289	if (dai->capture.active)
	290	sport_rx_start(sport);
	291	if (dai->playback.active)
	292	sport_tx_start(sport);
	293	return 0;
	294	}
	295
	296	#else
	297	#define bf5xx_ac97_suspend NULL
	298	#define bf5xx_ac97_resume NULL
	299	#endif
	300
	301	static int bf5xx_ac97_probe(struct platform_device *pdev,
	302	struct snd_soc_dai *dai)
	303	{
67f854b9	304	int ret = 0;
f2028623 CC	305	cmd_count = (int *)get_zeroed_page(GFP_KERNEL);
	306	if (cmd_count == NULL)
	307	return -ENOMEM;
	308
92a950ff	309	if (peripheral_request_list(sport_req[sport_num], "soc-audio")) {
f2028623	310	pr_err("Requesting Peripherals failed\n");
67f854b9 CC	311	ret = -EFAULT;
67f854b9 CC	312	goto peripheral_err;
92a950ff	313	}
f2028623 CC	314
	315	#ifdef CONFIG_SND_BF5XX_HAVE_COLD_RESET
	316	/* Request PB3 as reset pin */
	317	if (gpio_request(CONFIG_SND_BF5XX_RESET_GPIO_NUM, "SND_AD198x RESET")) {
	318	pr_err("Failed to request GPIO_%d for reset\n",
	319	CONFIG_SND_BF5XX_RESET_GPIO_NUM);
67f854b9 CC	320	ret = -1;
67f854b9 CC	321	goto gpio_err;
f2028623 CC	322	}
	323	gpio_direction_output(CONFIG_SND_BF5XX_RESET_GPIO_NUM, 1);
	324	#endif
	325	sport_handle = sport_init(&sport_params[sport_num], 2, \
	326	sizeof(struct ac97_frame), NULL);
	327	if (!sport_handle) {
67f854b9 CC	328	ret = -ENODEV;
67f854b9 CC	329	goto sport_err;
f2028623 CC	330	}
	331	/SPORT works in TDM mode to simulate AC97 transfers/
	332	ret = sport_set_multichannel(sport_handle, 16, 0x1F, 1);
	333	if (ret) {
	334	pr_err("SPORT is busy!\n");
67f854b9 CC	335	ret = -EBUSY;
67f854b9 CC	336	goto sport_config_err;
f2028623 CC	337	}
	338
	339	ret = sport_config_rx(sport_handle, IRFS, 0xF, 0, (16*16-1));
	340	if (ret) {
	341	pr_err("SPORT is busy!\n");
67f854b9 CC	342	ret = -EBUSY;
67f854b9 CC	343	goto sport_config_err;
f2028623 CC	344	}
	345
	346	ret = sport_config_tx(sport_handle, ITFS, 0xF, 0, (16*16-1));
	347	if (ret) {
	348	pr_err("SPORT is busy!\n");
67f854b9 CC	349	ret = -EBUSY;
	350	goto sport_config_err;
	351	}
	352
0cade26e MH	353	return 0;
0cade26e MH	354
67f854b9 CC	355	sport_config_err:
	356	kfree(sport_handle);
	357	sport_err:
f2028623	358	#ifdef CONFIG_SND_BF5XX_HAVE_COLD_RESET
67f854b9	359	gpio_free(CONFIG_SND_BF5XX_RESET_GPIO_NUM);
67f854b9	360	gpio_err:
3465d93a	361	#endif
92a950ff	362	peripheral_free_list(sport_req[sport_num]);
67f854b9 CC	363	peripheral_err:
	364	free_page((unsigned long)cmd_count);
	365	cmd_count = NULL;
	366
	367	return ret;
f2028623 CC	368	}
	369
	370	static void bf5xx_ac97_remove(struct platform_device *pdev,
	371	struct snd_soc_dai *dai)
	372	{
	373	free_page((unsigned long)cmd_count);
	374	cmd_count = NULL;
92a950ff	375	peripheral_free_list(sport_req[sport_num]);
f2028623 CC	376	#ifdef CONFIG_SND_BF5XX_HAVE_COLD_RESET
	377	gpio_free(CONFIG_SND_BF5XX_RESET_GPIO_NUM);
	378	#endif
	379	}
	380
	381	struct snd_soc_dai bfin_ac97_dai = {
	382	.name = "bf5xx-ac97",
	383	.id = 0,
3ba9e10a	384	.ac97_control = 1,
f2028623 CC	385	.probe = bf5xx_ac97_probe,
	386	.remove = bf5xx_ac97_remove,
	387	.suspend = bf5xx_ac97_suspend,
	388	.resume = bf5xx_ac97_resume,
	389	.playback = {
	390	.stream_name = "AC97 Playback",
	391	.channels_min = 2,
67f854b9 CC	392	#if defined(CONFIG_SND_BF5XX_MULTICHAN_SUPPORT)
	393	.channels_max = 6,
	394	#else
f2028623	395	.channels_max = 2,
67f854b9	396	#endif
f2028623 CC	397	.rates = SNDRV_PCM_RATE_48000,
	398	.formats = SNDRV_PCM_FMTBIT_S16_LE, },
	399	.capture = {
	400	.stream_name = "AC97 Capture",
	401	.channels_min = 2,
	402	.channels_max = 2,
	403	.rates = SNDRV_PCM_RATE_48000,
	404	.formats = SNDRV_PCM_FMTBIT_S16_LE, },
	405	};
	406	EXPORT_SYMBOL_GPL(bfin_ac97_dai);
	407
c9b3a40f	408	static int __init bfin_ac97_init(void)
3f4b783c MB	409	{
	410	return snd_soc_register_dai(&bfin_ac97_dai);
	411	}
	412	module_init(bfin_ac97_init);
	413
	414	static void __exit bfin_ac97_exit(void)
	415	{
	416	snd_soc_unregister_dai(&bfin_ac97_dai);
	417	}
	418	module_exit(bfin_ac97_exit);
	419
f2028623 CC	420	MODULE_AUTHOR("Roy Huang");
	421	MODULE_DESCRIPTION("AC97 driver for ADI Blackfin");
	422	MODULE_LICENSE("GPL");