[deliverable/linux.git] / sound / soc / blackfin / bf5xx-tdm.c

/*
 * File:         sound/soc/blackfin/bf5xx-tdm.c
 * Author:       Barry Song <Barry.Song@analog.com>
 *
 * Created:      Thurs June 04 2009
 * Description:  Blackfin I2S(TDM) CPU DAI driver
 *              Even though TDM mode can be as part of I2S DAI, but there
 *              are so much difference in configuration and data flow,
 *              it's very ugly to integrate I2S and TDM into a module
 *
 * Modified:
 *               Copyright 2009 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/init.h>
#include <linux/module.h>
#include <linux/device.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.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-tdm.h"

static struct bf5xx_tdm_port bf5xx_tdm;
static int sport_num = CONFIG_SND_BF5XX_SPORT_NUM;

static struct sport_param sport_params[2] = {
	{
		.dma_rx_chan    = CH_SPORT0_RX,
		.dma_tx_chan    = CH_SPORT0_TX,
		.err_irq        = IRQ_SPORT0_ERROR,
		.regs           = (struct sport_register *)SPORT0_TCR1,
	},
	{
		.dma_rx_chan    = CH_SPORT1_RX,
		.dma_tx_chan    = CH_SPORT1_TX,
		.err_irq        = IRQ_SPORT1_ERROR,
		.regs           = (struct sport_register *)SPORT1_TCR1,
	}
};

/*
 * Setting the TFS pin selector for SPORT 0 based on whether the selected
 * port id F or G. If the port is F then no conflict should exist for the
 * TFS. When Port G is selected and EMAC then there is a conflict between
 * the PHY interrupt line and TFS.  Current settings prevent the conflict
 * by ignoring the TFS pin when Port G is selected. This allows both
 * codecs and EMAC using Port G concurrently.
 */
#ifdef CONFIG_BF527_SPORT0_PORTG
#define LOCAL_SPORT0_TFS (0)
#else
#define LOCAL_SPORT0_TFS (P_SPORT0_TFS)
#endif

static u16 sport_req[][7] = { {P_SPORT0_DTPRI, P_SPORT0_TSCLK, P_SPORT0_RFS,
	P_SPORT0_DRPRI, P_SPORT0_RSCLK, LOCAL_SPORT0_TFS, 0},
	   {P_SPORT1_DTPRI, P_SPORT1_TSCLK, P_SPORT1_RFS, P_SPORT1_DRPRI,
		   P_SPORT1_RSCLK, P_SPORT1_TFS, 0} };

static int bf5xx_tdm_set_dai_fmt(struct snd_soc_dai *cpu_dai,
	unsigned int fmt)
{
	int ret = 0;

	/* interface format:support TDM,slave mode */
	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
	case SND_SOC_DAIFMT_DSP_A:
		break;
	default:
		printk(KERN_ERR "%s: Unknown DAI format type\n", __func__);
		ret = -EINVAL;
		break;
	}

	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
	case SND_SOC_DAIFMT_CBM_CFM:
		break;
	case SND_SOC_DAIFMT_CBS_CFS:
	case SND_SOC_DAIFMT_CBM_CFS:
	case SND_SOC_DAIFMT_CBS_CFM:
		ret = -EINVAL;
		break;
	default:
		printk(KERN_ERR "%s: Unknown DAI master type\n", __func__);
		ret = -EINVAL;
		break;
	}

	return ret;
}

static int bf5xx_tdm_hw_params(struct snd_pcm_substream *substream,
	struct snd_pcm_hw_params *params,
	struct snd_soc_dai *dai)
{
	int ret = 0;

	bf5xx_tdm.tcr2 &= ~0x1f;
	bf5xx_tdm.rcr2 &= ~0x1f;
	switch (params_format(params)) {
	case SNDRV_PCM_FORMAT_S32_LE:
		bf5xx_tdm.tcr2 |= 31;
		bf5xx_tdm.rcr2 |= 31;
		sport_handle->wdsize = 4;
		break;
		/* at present, we only support 32bit transfer */
	default:
		pr_err("not supported PCM format yet\n");
		return -EINVAL;
		break;
	}

	if (!bf5xx_tdm.configured) {
		/*
		 * TX and RX are not independent,they are enabled at the
		 * same time, even if only one side is running. So, we
		 * need to configure both of them at the time when the first
		 * stream is opened.
		 *
		 * CPU DAI:slave mode.
		 */
		ret = sport_config_rx(sport_handle, bf5xx_tdm.rcr1,
			bf5xx_tdm.rcr2, 0, 0);
		if (ret) {
			pr_err("SPORT is busy!\n");
			return -EBUSY;
		}

		ret = sport_config_tx(sport_handle, bf5xx_tdm.tcr1,
			bf5xx_tdm.tcr2, 0, 0);
		if (ret) {
			pr_err("SPORT is busy!\n");
			return -EBUSY;
		}

		bf5xx_tdm.configured = 1;
	}

	return 0;
}

static void bf5xx_tdm_shutdown(struct snd_pcm_substream *substream,
	struct snd_soc_dai *dai)
{
	/* No active stream, SPORT is allowed to be configured again. */
	if (!dai->active)
		bf5xx_tdm.configured = 0;
}

static int bf5xx_tdm_set_channel_map(struct snd_soc_dai *dai,
		unsigned int tx_num, unsigned int *tx_slot,
		unsigned int rx_num, unsigned int *rx_slot)
{
	int i;
	unsigned int slot;
	unsigned int tx_mapped = 0, rx_mapped = 0;

	if ((tx_num > BFIN_TDM_DAI_MAX_SLOTS) ||
			(rx_num > BFIN_TDM_DAI_MAX_SLOTS))
		return -EINVAL;

	for (i = 0; i < tx_num; i++) {
		slot = tx_slot[i];
		if ((slot < BFIN_TDM_DAI_MAX_SLOTS) &&
				(!(tx_mapped & (1 << slot)))) {
			bf5xx_tdm.tx_map[i] = slot;
			tx_mapped |= 1 << slot;
		} else
			return -EINVAL;
	}
	for (i = 0; i < rx_num; i++) {
		slot = rx_slot[i];
		if ((slot < BFIN_TDM_DAI_MAX_SLOTS) &&
				(!(rx_mapped & (1 << slot)))) {
			bf5xx_tdm.rx_map[i] = slot;
			rx_mapped |= 1 << slot;
		} else
			return -EINVAL;
	}

	return 0;
}

#ifdef CONFIG_PM
static int bf5xx_tdm_suspend(struct snd_soc_dai *dai)
{
	struct sport_device *sport = dai->private_data;

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

	if (!dai->active)
		return 0;

	ret = sport_set_multichannel(sport, 8, 0xFF, 1);
	if (ret) {
		pr_err("SPORT is busy!\n");
		ret = -EBUSY;
	}

	ret = sport_config_rx(sport, IRFS, 0x1F, 0, 0);
	if (ret) {
		pr_err("SPORT is busy!\n");
		ret = -EBUSY;
	}

	ret = sport_config_tx(sport, ITFS, 0x1F, 0, 0);
	if (ret) {
		pr_err("SPORT is busy!\n");
		ret = -EBUSY;
	}

	return 0;
}

#else
#define bf5xx_tdm_suspend      NULL
#define bf5xx_tdm_resume       NULL
#endif

static struct snd_soc_dai_ops bf5xx_tdm_dai_ops = {
	.hw_params      = bf5xx_tdm_hw_params,
	.set_fmt        = bf5xx_tdm_set_dai_fmt,
	.shutdown       = bf5xx_tdm_shutdown,
	.set_channel_map   = bf5xx_tdm_set_channel_map,
};

static struct snd_soc_dai_driver bf5xx_tdm_dai = {
	.suspend = bf5xx_tdm_suspend,
	.resume = bf5xx_tdm_resume,
	.playback = {
		.channels_min = 2,
		.channels_max = 8,
		.rates = SNDRV_PCM_RATE_48000,
		.formats = SNDRV_PCM_FMTBIT_S32_LE,},
	.capture = {
		.channels_min = 2,
		.channels_max = 8,
		.rates = SNDRV_PCM_RATE_48000,
		.formats = SNDRV_PCM_FMTBIT_S32_LE,},
	.ops = &bf5xx_tdm_dai_ops,
};

static int __devinit bfin_tdm_probe(struct platform_device *pdev)
{
	int ret = 0;

	if (peripheral_request_list(&sport_req[sport_num][0], "soc-audio")) {
		pr_err("Requesting Peripherals failed\n");
		return -EFAULT;
	}

	/* request DMA for SPORT */
	sport_handle = sport_init(&sport_params[sport_num], 4, \
		8 * sizeof(u32), NULL);
	if (!sport_handle) {
		peripheral_free_list(&sport_req[sport_num][0]);
		return -ENODEV;
	}

	/* SPORT works in TDM mode */
	ret = sport_set_multichannel(sport_handle, 8, 0xFF, 1);
	if (ret) {
		pr_err("SPORT is busy!\n");
		ret = -EBUSY;
		goto sport_config_err;
	}

	ret = sport_config_rx(sport_handle, IRFS, 0x1F, 0, 0);
	if (ret) {
		pr_err("SPORT is busy!\n");
		ret = -EBUSY;
		goto sport_config_err;
	}

	ret = sport_config_tx(sport_handle, ITFS, 0x1F, 0, 0);
	if (ret) {
		pr_err("SPORT is busy!\n");
		ret = -EBUSY;
		goto sport_config_err;
	}

	ret = snd_soc_register_dai(&pdev->dev, &bf5xx_tdm_dai);
	if (ret) {
		pr_err("Failed to register DAI: %d\n", ret);
		goto sport_config_err;
	}

	sport_handle->private_data = &bf5xx_tdm;
	return 0;

sport_config_err:
	peripheral_free_list(&sport_req[sport_num][0]);
	return ret;
}

static int __devexit bfin_tdm_remove(struct platform_device *pdev)
{
	peripheral_free_list(&sport_req[sport_num][0]);
	snd_soc_unregister_dai(&pdev->dev);

	return 0;
}

static struct platform_driver bfin_tdm_driver = {
	.probe  = bfin_tdm_probe,
	.remove = __devexit_p(bfin_tdm_remove),
	.driver = {
		.name   = "bfin-tdm",
		.owner  = THIS_MODULE,
	},
};

static int __init bfin_tdm_init(void)
{
	return platform_driver_register(&bfin_tdm_driver);
}
module_init(bfin_tdm_init);

static void __exit bfin_tdm_exit(void)
{
	platform_driver_unregister(&bfin_tdm_driver);
}
module_exit(bfin_tdm_exit);

/* Module information */
MODULE_AUTHOR("Barry Song");
MODULE_DESCRIPTION("TDM driver for ADI Blackfin");
MODULE_LICENSE("GPL");
Commit	Line	Data
01e2ab20 BS	1	/*
	2	* File: sound/soc/blackfin/bf5xx-tdm.c
	3	* Author: Barry Song <Barry.Song@analog.com>
	4	*
	5	* Created: Thurs June 04 2009
	6	* Description: Blackfin I2S(TDM) CPU DAI driver
	7	* Even though TDM mode can be as part of I2S DAI, but there
	8	* are so much difference in configuration and data flow,
	9	* it's very ugly to integrate I2S and TDM into a module
	10	*
	11	* Modified:
	12	* Copyright 2009 Analog Devices Inc.
	13	*
	14	* Bugs: Enter bugs at http://blackfin.uclinux.org/
	15	*
	16	* This program is free software; you can redistribute it and/or modify
	17	* it under the terms of the GNU General Public License as published by
	18	* the Free Software Foundation; either version 2 of the License, or
	19	* (at your option) any later version.
	20	*
	21	* This program is distributed in the hope that it will be useful,
	22	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	23	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	24	* GNU General Public License for more details.
	25	*
	26	* You should have received a copy of the GNU General Public License
	27	* along with this program; if not, see the file COPYING, or write
	28	* to the Free Software Foundation, Inc.,
	29	* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
	30	*/
	31
	32	#include <linux/init.h>
	33	#include <linux/module.h>
	34	#include <linux/device.h>
	35	#include <sound/core.h>
	36	#include <sound/pcm.h>
	37	#include <sound/pcm_params.h>
	38	#include <sound/initval.h>
	39	#include <sound/soc.h>
	40
	41	#include <asm/irq.h>
	42	#include <asm/portmux.h>
	43	#include <linux/mutex.h>
	44	#include <linux/gpio.h>
	45
	46	#include "bf5xx-sport.h"
	47	#include "bf5xx-tdm.h"
	48
01e2ab20 BS	49	static struct bf5xx_tdm_port bf5xx_tdm;
	50	static int sport_num = CONFIG_SND_BF5XX_SPORT_NUM;
	51
	52	static struct sport_param sport_params[2] = {
	53	{
	54	.dma_rx_chan = CH_SPORT0_RX,
	55	.dma_tx_chan = CH_SPORT0_TX,
	56	.err_irq = IRQ_SPORT0_ERROR,
	57	.regs = (struct sport_register *)SPORT0_TCR1,
	58	},
	59	{
	60	.dma_rx_chan = CH_SPORT1_RX,
	61	.dma_tx_chan = CH_SPORT1_TX,
	62	.err_irq = IRQ_SPORT1_ERROR,
	63	.regs = (struct sport_register *)SPORT1_TCR1,
	64	}
	65	};
	66
	67	/*
	68	* Setting the TFS pin selector for SPORT 0 based on whether the selected
	69	* port id F or G. If the port is F then no conflict should exist for the
	70	* TFS. When Port G is selected and EMAC then there is a conflict between
	71	* the PHY interrupt line and TFS. Current settings prevent the conflict
	72	* by ignoring the TFS pin when Port G is selected. This allows both
df0fd5e5	73	* codecs and EMAC using Port G concurrently.
01e2ab20	74	*/
df0fd5e5	75	#ifdef CONFIG_BF527_SPORT0_PORTG
01e2ab20	76	#define LOCAL_SPORT0_TFS (0)
df0fd5e5 CC	77	#else
df0fd5e5 CC	78	#define LOCAL_SPORT0_TFS (P_SPORT0_TFS)
01e2ab20 BS	79	#endif
	80
	81	static u16 sport_req[][7] = { {P_SPORT0_DTPRI, P_SPORT0_TSCLK, P_SPORT0_RFS,
	82	P_SPORT0_DRPRI, P_SPORT0_RSCLK, LOCAL_SPORT0_TFS, 0},
	83	{P_SPORT1_DTPRI, P_SPORT1_TSCLK, P_SPORT1_RFS, P_SPORT1_DRPRI,
	84	P_SPORT1_RSCLK, P_SPORT1_TFS, 0} };
	85
	86	static int bf5xx_tdm_set_dai_fmt(struct snd_soc_dai *cpu_dai,
	87	unsigned int fmt)
	88	{
	89	int ret = 0;
	90
	91	/* interface format:support TDM,slave mode */
	92	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
	93	case SND_SOC_DAIFMT_DSP_A:
	94	break;
	95	default:
	96	printk(KERN_ERR "%s: Unknown DAI format type\n", __func__);
	97	ret = -EINVAL;
	98	break;
	99	}
	100
	101	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
	102	case SND_SOC_DAIFMT_CBM_CFM:
	103	break;
	104	case SND_SOC_DAIFMT_CBS_CFS:
	105	case SND_SOC_DAIFMT_CBM_CFS:
	106	case SND_SOC_DAIFMT_CBS_CFM:
	107	ret = -EINVAL;
	108	break;
	109	default:
	110	printk(KERN_ERR "%s: Unknown DAI master type\n", __func__);
	111	ret = -EINVAL;
	112	break;
	113	}
	114
	115	return ret;
	116	}
	117
	118	static int bf5xx_tdm_hw_params(struct snd_pcm_substream *substream,
	119	struct snd_pcm_hw_params *params,
	120	struct snd_soc_dai *dai)
	121	{
	122	int ret = 0;
	123
	124	bf5xx_tdm.tcr2 &= ~0x1f;
	125	bf5xx_tdm.rcr2 &= ~0x1f;
	126	switch (params_format(params)) {
	127	case SNDRV_PCM_FORMAT_S32_LE:
	128	bf5xx_tdm.tcr2 \|= 31;
	129	bf5xx_tdm.rcr2 \|= 31;
	130	sport_handle->wdsize = 4;
	131	break;
	132	/* at present, we only support 32bit transfer */
	133	default:
	134	pr_err("not supported PCM format yet\n");
	135	return -EINVAL;
	136	break;
	137	}
	138
	139	if (!bf5xx_tdm.configured) {
	140	/*
	141	* TX and RX are not independent,they are enabled at the
	142	* same time, even if only one side is running. So, we
143	* need to configure both of them at the time when the first
144	* stream is opened.
145	*
146	* CPU DAI:slave mode.
147	*/
148	ret = sport_config_rx(sport_handle, bf5xx_tdm.rcr1,
149	bf5xx_tdm.rcr2, 0, 0);
150	if (ret) {
151	pr_err("SPORT is busy!\n");
152	return -EBUSY;
153	}
154
155	ret = sport_config_tx(sport_handle, bf5xx_tdm.tcr1,
156	bf5xx_tdm.tcr2, 0, 0);
157	if (ret) {
158	pr_err("SPORT is busy!\n");
159	return -EBUSY;
160	}
161
162	bf5xx_tdm.configured = 1;
163	}
164
165	return 0;
166	}
167
168	static void bf5xx_tdm_shutdown(struct snd_pcm_substream *substream,
169	struct snd_soc_dai *dai)
170	{
171	/* No active stream, SPORT is allowed to be configured again. */
172	if (!dai->active)
173	bf5xx_tdm.configured = 0;
174	}
175
08db48f1 BS	176	static int bf5xx_tdm_set_channel_map(struct snd_soc_dai *dai,
	177	unsigned int tx_num, unsigned int *tx_slot,
	178	unsigned int rx_num, unsigned int *rx_slot)
	179	{
	180	int i;
	181	unsigned int slot;
	182	unsigned int tx_mapped = 0, rx_mapped = 0;
	183
	184	if ((tx_num > BFIN_TDM_DAI_MAX_SLOTS) \|\|
	185	(rx_num > BFIN_TDM_DAI_MAX_SLOTS))
	186	return -EINVAL;
	187
	188	for (i = 0; i < tx_num; i++) {
	189	slot = tx_slot[i];
	190	if ((slot < BFIN_TDM_DAI_MAX_SLOTS) &&
	191	(!(tx_mapped & (1 << slot)))) {
	192	bf5xx_tdm.tx_map[i] = slot;
	193	tx_mapped \|= 1 << slot;
	194	} else
	195	return -EINVAL;
	196	}
	197	for (i = 0; i < rx_num; i++) {
	198	slot = rx_slot[i];
	199	if ((slot < BFIN_TDM_DAI_MAX_SLOTS) &&
	200	(!(rx_mapped & (1 << slot)))) {
	201	bf5xx_tdm.rx_map[i] = slot;
	202	rx_mapped \|= 1 << slot;
	203	} else
	204	return -EINVAL;
	205	}
	206
	207	return 0;
	208	}
	209
01e2ab20 BS	210	#ifdef CONFIG_PM
	211	static int bf5xx_tdm_suspend(struct snd_soc_dai *dai)
	212	{
8ff23610	213	struct sport_device *sport = dai->private_data;
01e2ab20 BS	214
	215	if (!dai->active)
	216	return 0;
f0fba2ad	217	if (dai->capture_active)
01e2ab20	218	sport_rx_stop(sport);
f0fba2ad	219	if (dai->playback_active)
01e2ab20 BS	220	sport_tx_stop(sport);
	221	return 0;
	222	}
	223
	224	static int bf5xx_tdm_resume(struct snd_soc_dai *dai)
	225	{
	226	int ret;
f0fba2ad	227	struct sport_device *sport = snd_soc_dai_get_drvdata(dai);
01e2ab20 BS	228
	229	if (!dai->active)
	230	return 0;
	231
	232	ret = sport_set_multichannel(sport, 8, 0xFF, 1);
	233	if (ret) {
	234	pr_err("SPORT is busy!\n");
	235	ret = -EBUSY;
	236	}
	237
	238	ret = sport_config_rx(sport, IRFS, 0x1F, 0, 0);
	239	if (ret) {
	240	pr_err("SPORT is busy!\n");
	241	ret = -EBUSY;
	242	}
	243
	244	ret = sport_config_tx(sport, ITFS, 0x1F, 0, 0);
	245	if (ret) {
	246	pr_err("SPORT is busy!\n");
	247	ret = -EBUSY;
	248	}
	249
	250	return 0;
	251	}
	252
	253	#else
	254	#define bf5xx_tdm_suspend NULL
	255	#define bf5xx_tdm_resume NULL
	256	#endif
	257
	258	static struct snd_soc_dai_ops bf5xx_tdm_dai_ops = {
	259	.hw_params = bf5xx_tdm_hw_params,
	260	.set_fmt = bf5xx_tdm_set_dai_fmt,
	261	.shutdown = bf5xx_tdm_shutdown,
08db48f1	262	.set_channel_map = bf5xx_tdm_set_channel_map,
01e2ab20 BS	263	};
01e2ab20 BS	264
f0fba2ad	265	static struct snd_soc_dai_driver bf5xx_tdm_dai = {
01e2ab20 BS	266	.suspend = bf5xx_tdm_suspend,
	267	.resume = bf5xx_tdm_resume,
	268	.playback = {
	269	.channels_min = 2,
	270	.channels_max = 8,
	271	.rates = SNDRV_PCM_RATE_48000,
	272	.formats = SNDRV_PCM_FMTBIT_S32_LE,},
	273	.capture = {
	274	.channels_min = 2,
	275	.channels_max = 8,
	276	.rates = SNDRV_PCM_RATE_48000,
	277	.formats = SNDRV_PCM_FMTBIT_S32_LE,},
	278	.ops = &bf5xx_tdm_dai_ops,
	279	};
01e2ab20 BS	280
	281	static int __devinit bfin_tdm_probe(struct platform_device *pdev)
	282	{
	283	int ret = 0;
	284
	285	if (peripheral_request_list(&sport_req[sport_num][0], "soc-audio")) {
	286	pr_err("Requesting Peripherals failed\n");
	287	return -EFAULT;
	288	}
	289
	290	/* request DMA for SPORT */
	291	sport_handle = sport_init(&sport_params[sport_num], 4, \
	292	8 * sizeof(u32), NULL);
	293	if (!sport_handle) {
	294	peripheral_free_list(&sport_req[sport_num][0]);
	295	return -ENODEV;
	296	}
	297
	298	/* SPORT works in TDM mode */
	299	ret = sport_set_multichannel(sport_handle, 8, 0xFF, 1);
	300	if (ret) {
	301	pr_err("SPORT is busy!\n");
	302	ret = -EBUSY;
	303	goto sport_config_err;
	304	}
	305
	306	ret = sport_config_rx(sport_handle, IRFS, 0x1F, 0, 0);
	307	if (ret) {
	308	pr_err("SPORT is busy!\n");
	309	ret = -EBUSY;
	310	goto sport_config_err;
	311	}
	312
	313	ret = sport_config_tx(sport_handle, ITFS, 0x1F, 0, 0);
	314	if (ret) {
	315	pr_err("SPORT is busy!\n");
	316	ret = -EBUSY;
	317	goto sport_config_err;
	318	}
	319
f0fba2ad	320	ret = snd_soc_register_dai(&pdev->dev, &bf5xx_tdm_dai);
01e2ab20 BS	321	if (ret) {
	322	pr_err("Failed to register DAI: %d\n", ret);
	323	goto sport_config_err;
	324	}
08db48f1 BS	325
08db48f1 BS	326	sport_handle->private_data = &bf5xx_tdm;
01e2ab20 BS	327	return 0;
	328
	329	sport_config_err:
	330	peripheral_free_list(&sport_req[sport_num][0]);
	331	return ret;
	332	}
	333
	334	static int __devexit bfin_tdm_remove(struct platform_device *pdev)
	335	{
	336	peripheral_free_list(&sport_req[sport_num][0]);
f0fba2ad	337	snd_soc_unregister_dai(&pdev->dev);
01e2ab20 BS	338
	339	return 0;
	340	}
	341
	342	static struct platform_driver bfin_tdm_driver = {
	343	.probe = bfin_tdm_probe,
	344	.remove = __devexit_p(bfin_tdm_remove),
	345	.driver = {
	346	.name = "bfin-tdm",
	347	.owner = THIS_MODULE,
	348	},
	349	};
	350
	351	static int __init bfin_tdm_init(void)
	352	{
	353	return platform_driver_register(&bfin_tdm_driver);
	354	}
	355	module_init(bfin_tdm_init);
	356
	357	static void __exit bfin_tdm_exit(void)
	358	{
	359	platform_driver_unregister(&bfin_tdm_driver);
	360	}
	361	module_exit(bfin_tdm_exit);
	362
	363	/* Module information */
	364	MODULE_AUTHOR("Barry Song");
	365	MODULE_DESCRIPTION("TDM driver for ADI Blackfin");
	366	MODULE_LICENSE("GPL");
	367