sound/soc/blackfin/bf5xx-i2s.c - maze/linux - Git at Google

 /*
  * File:         sound/soc/blackfin/bf5xx-i2s.c
  * Author:       Cliff Cai <Cliff.Cai@analog.com>
  *
  * Created:      Tue June 06 2008
  * Description:  Blackfin I2S CPU DAI driver
  *
  * 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/init.h>
 #include <linux/module.h>
 #include <linux/device.h>
 #include <linux/delay.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-i2s.h"

 struct bf5xx_i2s_port {
 	u16 tcr1;
 	u16 rcr1;
 	u16 tcr2;
 	u16 rcr2;
 	int counter;
 };

 static struct bf5xx_i2s_port bf5xx_i2s;
 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
  * ssm2602 using Port G and EMAC concurrently.
  */
 #ifdef CONFIG_BF527_SPORT0_PORTF
 #define LOCAL_SPORT0_TFS (P_SPORT0_TFS)
 #else
 #define LOCAL_SPORT0_TFS (0)
 #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_i2s_set_dai_fmt(struct snd_soc_dai *cpu_dai,
 		unsigned int fmt)
 {
 	int ret = 0;

 	/* interface format:support I2S,slave mode */
 	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 	case SND_SOC_DAIFMT_I2S:
 		bf5xx_i2s.tcr1 |= TFSR | TCKFE;
 		bf5xx_i2s.rcr1 |= RFSR | RCKFE;
 		bf5xx_i2s.tcr2 |= TSFSE;
 		bf5xx_i2s.rcr2 |= RSFSE;
 		break;
 	case SND_SOC_DAIFMT_DSP_A:
 		bf5xx_i2s.tcr1 |= TFSR;
 		bf5xx_i2s.rcr1 |= RFSR;
 		break;
 	case SND_SOC_DAIFMT_LEFT_J:
 		ret = -EINVAL;
 		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_i2s_startup(struct snd_pcm_substream *substream,
 			     struct snd_soc_dai *dai)
 {
 	pr_debug("%s enter\n", __func__);

 	/*this counter is used for counting how many pcm streams are opened*/
 	bf5xx_i2s.counter++;
 	return 0;
 }

 static int bf5xx_i2s_hw_params(struct snd_pcm_substream *substream,
 				struct snd_pcm_hw_params *params,
 				struct snd_soc_dai *dai)
 {
 	int ret = 0;

 	bf5xx_i2s.tcr2 &= ~0x1f;
 	bf5xx_i2s.rcr2 &= ~0x1f;
 	switch (params_format(params)) {
 	case SNDRV_PCM_FORMAT_S16_LE:
 		bf5xx_i2s.tcr2 |= 15;
 		bf5xx_i2s.rcr2 |= 15;
 		sport_handle->wdsize = 2;
 		break;
 	case SNDRV_PCM_FORMAT_S24_LE:
 		bf5xx_i2s.tcr2 |= 23;
 		bf5xx_i2s.rcr2 |= 23;
 		sport_handle->wdsize = 3;
 		break;
 	case SNDRV_PCM_FORMAT_S32_LE:
 		bf5xx_i2s.tcr2 |= 31;
 		bf5xx_i2s.rcr2 |= 31;
 		sport_handle->wdsize = 4;
 		break;
 	}

 	if (bf5xx_i2s.counter == 1) {
 		/*
 		 * 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_i2s.rcr1,
 				      bf5xx_i2s.rcr2, 0, 0);
 		if (ret) {
 			pr_err("SPORT is busy!\n");
 			return -EBUSY;
 		}

 		ret = sport_config_tx(sport_handle, bf5xx_i2s.tcr1,
 				      bf5xx_i2s.tcr2, 0, 0);
 		if (ret) {
 			pr_err("SPORT is busy!\n");
 			return -EBUSY;
 		}
 	}

 	return 0;
 }

 static void bf5xx_i2s_shutdown(struct snd_pcm_substream *substream,
 			       struct snd_soc_dai *dai)
 {
 	pr_debug("%s enter\n", __func__);
 	bf5xx_i2s.counter--;
 }

 static int bf5xx_i2s_probe(struct platform_device *pdev,
 			   struct snd_soc_dai *dai)
 {
 	pr_debug("%s enter\n", __func__);
 	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, \
 			2 * sizeof(u32), NULL);
 	if (!sport_handle) {
 		peripheral_free_list(&sport_req[sport_num][0]);
 		return -ENODEV;
 	}

 	return 0;
 }

 static void bf5xx_i2s_remove(struct snd_soc_dai *dai)
 {
 	pr_debug("%s enter\n", __func__);
 	peripheral_free_list(&sport_req[sport_num][0]);
 }

 #ifdef CONFIG_PM
 static int bf5xx_i2s_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_i2s_resume(struct platform_device *pdev,
 			    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_config_rx(sport_handle, RFSR | RCKFE, RSFSE|0x1f, 0, 0);
 	if (ret) {
 		pr_err("SPORT is busy!\n");
 		return -EBUSY;
 	}

 	ret = sport_config_tx(sport_handle, TFSR | TCKFE, TSFSE|0x1f, 0, 0);
 	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_i2s_suspend	NULL
 #define bf5xx_i2s_resume	NULL
 #endif

 #define BF5XX_I2S_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
 		SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 | \
 		SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 | \
 		SNDRV_PCM_RATE_96000)

 #define BF5XX_I2S_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE |\
 	SNDRV_PCM_FMTBIT_S32_LE)

 struct snd_soc_dai bf5xx_i2s_dai = {
 	.name = "bf5xx-i2s",
 	.id = 0,
 	.probe = bf5xx_i2s_probe,
 	.remove = bf5xx_i2s_remove,
 	.suspend = bf5xx_i2s_suspend,
 	.resume = bf5xx_i2s_resume,
 	.playback = {
 		.channels_min = 1,
 		.channels_max = 2,
 		.rates = BF5XX_I2S_RATES,
 		.formats = BF5XX_I2S_FORMATS,},
 	.capture = {
 		.channels_min = 1,
 		.channels_max = 2,
 		.rates = BF5XX_I2S_RATES,
 		.formats = BF5XX_I2S_FORMATS,},
 	.ops = {
 		.startup   = bf5xx_i2s_startup,
 		.shutdown  = bf5xx_i2s_shutdown,
 		.hw_params = bf5xx_i2s_hw_params,
 		.set_fmt = bf5xx_i2s_set_dai_fmt,
 	},
 };
 EXPORT_SYMBOL_GPL(bf5xx_i2s_dai);

 static int __init bfin_i2s_init(void)
 {
 	return snd_soc_register_dai(&bf5xx_i2s_dai);
 }
 module_init(bfin_i2s_init);

 static void __exit bfin_i2s_exit(void)
 {
 	snd_soc_unregister_dai(&bf5xx_i2s_dai);
 }
 module_exit(bfin_i2s_exit);

 /* Module information */
 MODULE_AUTHOR("Cliff Cai");
 MODULE_DESCRIPTION("I2S driver for ADI Blackfin");
 MODULE_LICENSE("GPL");
	/*
	* File: sound/soc/blackfin/bf5xx-i2s.c
	* Author: Cliff Cai <Cliff.Cai@analog.com>
	*
	* Created: Tue June 06 2008
	* Description: Blackfin I2S CPU DAI driver
	*
	* 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/init.h>
	#include <linux/module.h>
	#include <linux/device.h>
	#include <linux/delay.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-i2s.h"

	struct bf5xx_i2s_port {
	u16 tcr1;
	u16 rcr1;
	u16 tcr2;
	u16 rcr2;
	int counter;
	};

	static struct bf5xx_i2s_port bf5xx_i2s;
	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
	* ssm2602 using Port G and EMAC concurrently.
	*/
	#ifdef CONFIG_BF527_SPORT0_PORTF
	#define LOCAL_SPORT0_TFS (P_SPORT0_TFS)
	#else
	#define LOCAL_SPORT0_TFS (0)
	#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_i2s_set_dai_fmt(struct snd_soc_dai *cpu_dai,
	unsigned int fmt)
	{
	int ret = 0;

	/* interface format:support I2S,slave mode */
	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
	case SND_SOC_DAIFMT_I2S:
	bf5xx_i2s.tcr1 \|= TFSR \| TCKFE;
	bf5xx_i2s.rcr1 \|= RFSR \| RCKFE;
	bf5xx_i2s.tcr2 \|= TSFSE;
	bf5xx_i2s.rcr2 \|= RSFSE;
	break;
	case SND_SOC_DAIFMT_DSP_A:
	bf5xx_i2s.tcr1 \|= TFSR;
	bf5xx_i2s.rcr1 \|= RFSR;
	break;
	case SND_SOC_DAIFMT_LEFT_J:
	ret = -EINVAL;
	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_i2s_startup(struct snd_pcm_substream *substream,
	struct snd_soc_dai *dai)
	{
	pr_debug("%s enter\n", __func__);

	/this counter is used for counting how many pcm streams are opened/
	bf5xx_i2s.counter++;
	return 0;
	}

	static int bf5xx_i2s_hw_params(struct snd_pcm_substream *substream,
	struct snd_pcm_hw_params *params,
	struct snd_soc_dai *dai)
	{
	int ret = 0;

	bf5xx_i2s.tcr2 &= ~0x1f;
	bf5xx_i2s.rcr2 &= ~0x1f;
	switch (params_format(params)) {
	case SNDRV_PCM_FORMAT_S16_LE:
	bf5xx_i2s.tcr2 \|= 15;
	bf5xx_i2s.rcr2 \|= 15;
	sport_handle->wdsize = 2;
	break;
	case SNDRV_PCM_FORMAT_S24_LE:
	bf5xx_i2s.tcr2 \|= 23;
	bf5xx_i2s.rcr2 \|= 23;
	sport_handle->wdsize = 3;
	break;
	case SNDRV_PCM_FORMAT_S32_LE:
	bf5xx_i2s.tcr2 \|= 31;
	bf5xx_i2s.rcr2 \|= 31;
	sport_handle->wdsize = 4;
	break;
	}

	if (bf5xx_i2s.counter == 1) {
	/*
	* 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_i2s.rcr1,
	bf5xx_i2s.rcr2, 0, 0);
	if (ret) {
	pr_err("SPORT is busy!\n");
	return -EBUSY;
	}

	ret = sport_config_tx(sport_handle, bf5xx_i2s.tcr1,
	bf5xx_i2s.tcr2, 0, 0);
	if (ret) {
	pr_err("SPORT is busy!\n");
	return -EBUSY;
	}
	}

	return 0;
	}

	static void bf5xx_i2s_shutdown(struct snd_pcm_substream *substream,
	struct snd_soc_dai *dai)
	{
	pr_debug("%s enter\n", __func__);
	bf5xx_i2s.counter--;
	}

	static int bf5xx_i2s_probe(struct platform_device *pdev,
	struct snd_soc_dai *dai)
	{
	pr_debug("%s enter\n", __func__);
	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, \
	2 * sizeof(u32), NULL);
	if (!sport_handle) {
	peripheral_free_list(&sport_req[sport_num][0]);
	return -ENODEV;
	}

	return 0;
	}

	static void bf5xx_i2s_remove(struct snd_soc_dai *dai)
	{
	pr_debug("%s enter\n", __func__);
	peripheral_free_list(&sport_req[sport_num][0]);
	}

	#ifdef CONFIG_PM
	static int bf5xx_i2s_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_i2s_resume(struct platform_device *pdev,
	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_config_rx(sport_handle, RFSR \| RCKFE, RSFSE\|0x1f, 0, 0);
	if (ret) {
	pr_err("SPORT is busy!\n");
	return -EBUSY;
	}

	ret = sport_config_tx(sport_handle, TFSR \| TCKFE, TSFSE\|0x1f, 0, 0);
	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_i2s_suspend NULL
	#define bf5xx_i2s_resume NULL
	#endif

	#define BF5XX_I2S_RATES (SNDRV_PCM_RATE_8000 \| SNDRV_PCM_RATE_11025 \|\
	SNDRV_PCM_RATE_16000 \| SNDRV_PCM_RATE_22050 \| \
	SNDRV_PCM_RATE_44100 \| SNDRV_PCM_RATE_48000 \| \
	SNDRV_PCM_RATE_96000)

	#define BF5XX_I2S_FORMATS (SNDRV_PCM_FMTBIT_S16_LE \| SNDRV_PCM_FMTBIT_S24_LE \|\
	SNDRV_PCM_FMTBIT_S32_LE)

	struct snd_soc_dai bf5xx_i2s_dai = {
	.name = "bf5xx-i2s",
	.id = 0,
	.probe = bf5xx_i2s_probe,
	.remove = bf5xx_i2s_remove,
	.suspend = bf5xx_i2s_suspend,
	.resume = bf5xx_i2s_resume,
	.playback = {
	.channels_min = 1,
	.channels_max = 2,
	.rates = BF5XX_I2S_RATES,
	.formats = BF5XX_I2S_FORMATS,},
	.capture = {
	.channels_min = 1,
	.channels_max = 2,
	.rates = BF5XX_I2S_RATES,
	.formats = BF5XX_I2S_FORMATS,},
	.ops = {
	.startup = bf5xx_i2s_startup,
	.shutdown = bf5xx_i2s_shutdown,
	.hw_params = bf5xx_i2s_hw_params,
	.set_fmt = bf5xx_i2s_set_dai_fmt,
	},
	};
	EXPORT_SYMBOL_GPL(bf5xx_i2s_dai);

	static int __init bfin_i2s_init(void)
	{
	return snd_soc_register_dai(&bf5xx_i2s_dai);
	}
	module_init(bfin_i2s_init);

	static void __exit bfin_i2s_exit(void)
	{
	snd_soc_unregister_dai(&bf5xx_i2s_dai);
	}
	module_exit(bfin_i2s_exit);

	/* Module information */
	MODULE_AUTHOR("Cliff Cai");
	MODULE_DESCRIPTION("I2S driver for ADI Blackfin");
	MODULE_LICENSE("GPL");