Commit e0b3032b authored by Takashi Iwai's avatar Takashi Iwai
Browse files

Merge branch 'topic/asoc' into for-linus 

* topic/asoc: (226 commits)
  ASoC: au1x: PSC-AC97 bugfixes
  ASoC: Fix WM835x Out4 capture enumeration
  ASoC: Remove unuused hw_read_t
  ASoC: fix pxa2xx-ac97.c breakage
  ASoC: Fully specify DC servo bits to update in wm_hubs
  ASoC: Debugged improper setting of PLL fields in WM8580 driver
  ASoC: new board driver to connect bfin-5xx with ad1836 codec
  ASoC: OMAP: Add functionality to set CLKR and FSR sources in McBSP DAI
  ASoC: davinci: i2c device creation moved into board files
  ASoC: Don't reconfigure WM8350 FLL if not needed
  ASoC: Fix s3c-i2s-v2 build
  ASoC: Make platform data optional for TLV320AIC3x
  ASoC: Add S3C24xx dependencies for Simtec machines
  ASoC: SDP3430: Fix TWL GPIO6 pin mux request
  ASoC: S3C platform: Fix s3c2410_dma_started() called at improper time
  ARM: OMAP: McBSP: Merge two functions into omap_mcbsp_start/_stop
  ASoC: OMAP: Fix setup of XCCR and RCCR registers in McBSP DAI
  OMAP: McBSP: Use textual values in DMA operating mode sysfs files
  ARM: OMAP: DMA: Add support for DMA channel self linking on OMAP1510
  ASoC: Select core DMA when building for S3C64xx
  ...
parents 45fae5c7 cdc65fbe

arch/arm/mach-omap2/mcbsp.c

+5 −0
Original line number Diff line number Diff line
@@ -128,6 +128,7 @@ static struct omap_mcbsp_platform_data omap34xx_mcbsp_pdata[] = { 
		.rx_irq		= INT_24XX_MCBSP1_IRQ_RX,

		.tx_irq		= INT_24XX_MCBSP1_IRQ_TX,

		.ops		= &omap2_mcbsp_ops,

		.buffer_size	= 0x6F,

	},

	{

		.phys_base	= OMAP34XX_MCBSP2_BASE,
@@ -136,6 +137,7 @@ static struct omap_mcbsp_platform_data omap34xx_mcbsp_pdata[] = { 
		.rx_irq		= INT_24XX_MCBSP2_IRQ_RX,

		.tx_irq		= INT_24XX_MCBSP2_IRQ_TX,

		.ops		= &omap2_mcbsp_ops,

		.buffer_size	= 0x3FF,

	},

	{

		.phys_base	= OMAP34XX_MCBSP3_BASE,
@@ -144,6 +146,7 @@ static struct omap_mcbsp_platform_data omap34xx_mcbsp_pdata[] = { 
		.rx_irq		= INT_24XX_MCBSP3_IRQ_RX,

		.tx_irq		= INT_24XX_MCBSP3_IRQ_TX,

		.ops		= &omap2_mcbsp_ops,

		.buffer_size	= 0x6F,

	},

	{

		.phys_base	= OMAP34XX_MCBSP4_BASE,
@@ -152,6 +155,7 @@ static struct omap_mcbsp_platform_data omap34xx_mcbsp_pdata[] = { 
		.rx_irq		= INT_24XX_MCBSP4_IRQ_RX,

		.tx_irq		= INT_24XX_MCBSP4_IRQ_TX,

		.ops		= &omap2_mcbsp_ops,

		.buffer_size	= 0x6F,

	},

	{

		.phys_base	= OMAP34XX_MCBSP5_BASE,
@@ -160,6 +164,7 @@ static struct omap_mcbsp_platform_data omap34xx_mcbsp_pdata[] = { 
		.rx_irq		= INT_24XX_MCBSP5_IRQ_RX,

		.tx_irq		= INT_24XX_MCBSP5_IRQ_TX,

		.ops		= &omap2_mcbsp_ops,

		.buffer_size	= 0x6F,

	},

};

#define OMAP34XX_MCBSP_PDATA_SZ		ARRAY_SIZE(omap34xx_mcbsp_pdata)

arch/arm/mach-pxa/include/mach/audio.h

+3 −0
Original line number Diff line number Diff line
@@ -3,10 +3,12 @@ 


#include <sound/core.h>

#include <sound/pcm.h>

#include <sound/ac97_codec.h>



/*

 * @reset_gpio: AC97 reset gpio (normally gpio113 or gpio95)

 *              a -1 value means no gpio will be used for reset

 * @codec_pdata: AC97 codec platform_data



 * reset_gpio should only be specified for pxa27x CPUs where a silicon

 * bug prevents correct operation of the reset line. If not specified,
@@ -20,6 +22,7 @@ typedef struct { 
	void (*resume)(void *);

	void *priv;

	int reset_gpio;

	void *codec_pdata[AC97_BUS_MAX_DEVICES];

} pxa2xx_audio_ops_t;



extern void pxa_set_ac97_info(pxa2xx_audio_ops_t *ops);

arch/arm/plat-omap/dma.c

+10 −0
Original line number Diff line number Diff line
@@ -1127,6 +1127,11 @@ int omap_dma_running(void) 
void omap_dma_link_lch(int lch_head, int lch_queue)

{

	if (omap_dma_in_1510_mode()) {

		if (lch_head == lch_queue) {

			dma_write(dma_read(CCR(lch_head)) | (3 << 8),

								CCR(lch_head));

			return;

		}

		printk(KERN_ERR "DMA linking is not supported in 1510 mode\n");

		BUG();

		return;
@@ -1149,6 +1154,11 @@ EXPORT_SYMBOL(omap_dma_link_lch); 
void omap_dma_unlink_lch(int lch_head, int lch_queue)

{

	if (omap_dma_in_1510_mode()) {

		if (lch_head == lch_queue) {

			dma_write(dma_read(CCR(lch_head)) & ~(3 << 8),

								CCR(lch_head));

			return;

		}

		printk(KERN_ERR "DMA linking is not supported in 1510 mode\n");

		BUG();

		return;

arch/arm/plat-omap/include/mach/mcbsp.h

+49 −2
Original line number Diff line number Diff line
@@ -134,6 +134,11 @@ 
#define OMAP_MCBSP_REG_XCERG	0x74

#define OMAP_MCBSP_REG_XCERH	0x78

#define OMAP_MCBSP_REG_SYSCON	0x8C

#define OMAP_MCBSP_REG_THRSH2	0x90

#define OMAP_MCBSP_REG_THRSH1	0x94

#define OMAP_MCBSP_REG_IRQST	0xA0

#define OMAP_MCBSP_REG_IRQEN	0xA4

#define OMAP_MCBSP_REG_WAKEUPEN	0xA8

#define OMAP_MCBSP_REG_XCCR	0xAC

#define OMAP_MCBSP_REG_RCCR	0xB0
@@ -249,8 +254,27 @@ 
#define RDISABLE		0x0001



/********************** McBSP SYSCONFIG bit definitions ********************/

#define CLOCKACTIVITY(value)	((value)<<8)

#define SIDLEMODE(value)	((value)<<3)

#define ENAWAKEUP		0x0004

#define SOFTRST			0x0002



/********************** McBSP DMA operating modes **************************/

#define MCBSP_DMA_MODE_ELEMENT		0

#define MCBSP_DMA_MODE_THRESHOLD	1

#define MCBSP_DMA_MODE_FRAME		2



/********************** McBSP WAKEUPEN bit definitions *********************/

#define XEMPTYEOFEN		0x4000

#define XRDYEN			0x0400

#define XEOFEN			0x0200

#define XFSXEN			0x0100

#define XSYNCERREN		0x0080

#define RRDYEN			0x0008

#define REOFEN			0x0004

#define RFSREN			0x0002

#define RSYNCERREN		0x0001



/* we don't do multichannel for now */

struct omap_mcbsp_reg_cfg {

	u16 spcr2;
@@ -344,6 +368,9 @@ struct omap_mcbsp_platform_data { 
	u8 dma_rx_sync, dma_tx_sync;

	u16 rx_irq, tx_irq;

	struct omap_mcbsp_ops *ops;

#ifdef CONFIG_ARCH_OMAP34XX

	u16 buffer_size;

#endif

};



struct omap_mcbsp {
@@ -377,6 +404,11 @@ struct omap_mcbsp { 
	struct omap_mcbsp_platform_data *pdata;

	struct clk *iclk;

	struct clk *fclk;

#ifdef CONFIG_ARCH_OMAP34XX

	int dma_op_mode;

	u16 max_tx_thres;

	u16 max_rx_thres;

#endif

};

extern struct omap_mcbsp **mcbsp_ptr;

extern int omap_mcbsp_count;
@@ -385,10 +417,25 @@ int omap_mcbsp_init(void); 
void omap_mcbsp_register_board_cfg(struct omap_mcbsp_platform_data *config,

					int size);

void omap_mcbsp_config(unsigned int id, const struct omap_mcbsp_reg_cfg * config);

#ifdef CONFIG_ARCH_OMAP34XX

void omap_mcbsp_set_tx_threshold(unsigned int id, u16 threshold);

void omap_mcbsp_set_rx_threshold(unsigned int id, u16 threshold);

u16 omap_mcbsp_get_max_tx_threshold(unsigned int id);

u16 omap_mcbsp_get_max_rx_threshold(unsigned int id);

int omap_mcbsp_get_dma_op_mode(unsigned int id);

#else

static inline void omap_mcbsp_set_tx_threshold(unsigned int id, u16 threshold)

{ }

static inline void omap_mcbsp_set_rx_threshold(unsigned int id, u16 threshold)

{ }

static inline u16 omap_mcbsp_get_max_tx_threshold(unsigned int id) { return 0; }

static inline u16 omap_mcbsp_get_max_rx_threshold(unsigned int id) { return 0; }

static inline int omap_mcbsp_get_dma_op_mode(unsigned int id) { return 0; }

#endif

int omap_mcbsp_request(unsigned int id);

void omap_mcbsp_free(unsigned int id);

void omap_mcbsp_start(unsigned int id);

void omap_mcbsp_stop(unsigned int id);

void omap_mcbsp_start(unsigned int id, int tx, int rx);

void omap_mcbsp_stop(unsigned int id, int tx, int rx);

void omap_mcbsp_xmit_word(unsigned int id, u32 word);

u32 omap_mcbsp_recv_word(unsigned int id);

arch/arm/plat-omap/mcbsp.c

+382 −19
Original line number Diff line number Diff line
@@ -198,6 +198,170 @@ void omap_mcbsp_config(unsigned int id, const struct omap_mcbsp_reg_cfg *config) 
}

EXPORT_SYMBOL(omap_mcbsp_config);



#ifdef CONFIG_ARCH_OMAP34XX

/*

 * omap_mcbsp_set_tx_threshold configures how to deal

 * with transmit threshold. the threshold value and handler can be

 * configure in here.

 */

void omap_mcbsp_set_tx_threshold(unsigned int id, u16 threshold)

{

	struct omap_mcbsp *mcbsp;

	void __iomem *io_base;



	if (!cpu_is_omap34xx())

		return;



	if (!omap_mcbsp_check_valid_id(id)) {

		printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1);

		return;

	}

	mcbsp = id_to_mcbsp_ptr(id);

	io_base = mcbsp->io_base;



	OMAP_MCBSP_WRITE(io_base, THRSH2, threshold);

}

EXPORT_SYMBOL(omap_mcbsp_set_tx_threshold);



/*

 * omap_mcbsp_set_rx_threshold configures how to deal

 * with receive threshold. the threshold value and handler can be

 * configure in here.

 */

void omap_mcbsp_set_rx_threshold(unsigned int id, u16 threshold)

{

	struct omap_mcbsp *mcbsp;

	void __iomem *io_base;



	if (!cpu_is_omap34xx())

		return;



	if (!omap_mcbsp_check_valid_id(id)) {

		printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1);

		return;

	}

	mcbsp = id_to_mcbsp_ptr(id);

	io_base = mcbsp->io_base;



	OMAP_MCBSP_WRITE(io_base, THRSH1, threshold);

}

EXPORT_SYMBOL(omap_mcbsp_set_rx_threshold);



/*

 * omap_mcbsp_get_max_tx_thres just return the current configured

 * maximum threshold for transmission

 */

u16 omap_mcbsp_get_max_tx_threshold(unsigned int id)

{

	struct omap_mcbsp *mcbsp;



	if (!omap_mcbsp_check_valid_id(id)) {

		printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1);

		return -ENODEV;

	}

	mcbsp = id_to_mcbsp_ptr(id);



	return mcbsp->max_tx_thres;

}

EXPORT_SYMBOL(omap_mcbsp_get_max_tx_threshold);



/*

 * omap_mcbsp_get_max_rx_thres just return the current configured

 * maximum threshold for reception

 */

u16 omap_mcbsp_get_max_rx_threshold(unsigned int id)

{

	struct omap_mcbsp *mcbsp;



	if (!omap_mcbsp_check_valid_id(id)) {

		printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1);

		return -ENODEV;

	}

	mcbsp = id_to_mcbsp_ptr(id);



	return mcbsp->max_rx_thres;

}

EXPORT_SYMBOL(omap_mcbsp_get_max_rx_threshold);



/*

 * omap_mcbsp_get_dma_op_mode just return the current configured

 * operating mode for the mcbsp channel

 */

int omap_mcbsp_get_dma_op_mode(unsigned int id)

{

	struct omap_mcbsp *mcbsp;

	int dma_op_mode;



	if (!omap_mcbsp_check_valid_id(id)) {

		printk(KERN_ERR "%s: Invalid id (%u)\n", __func__, id + 1);

		return -ENODEV;

	}

	mcbsp = id_to_mcbsp_ptr(id);



	spin_lock_irq(&mcbsp->lock);

	dma_op_mode = mcbsp->dma_op_mode;

	spin_unlock_irq(&mcbsp->lock);



	return dma_op_mode;

}

EXPORT_SYMBOL(omap_mcbsp_get_dma_op_mode);



static inline void omap34xx_mcbsp_request(struct omap_mcbsp *mcbsp)

{

	/*

	 * Enable wakup behavior, smart idle and all wakeups

	 * REVISIT: some wakeups may be unnecessary

	 */

	if (cpu_is_omap34xx()) {

		u16 syscon;



		syscon = OMAP_MCBSP_READ(mcbsp->io_base, SYSCON);

		syscon &= ~(ENAWAKEUP | SIDLEMODE(0x03) | CLOCKACTIVITY(0x03));



		spin_lock_irq(&mcbsp->lock);

		if (mcbsp->dma_op_mode == MCBSP_DMA_MODE_THRESHOLD) {

			syscon |= (ENAWAKEUP | SIDLEMODE(0x02) |

					CLOCKACTIVITY(0x02));

			OMAP_MCBSP_WRITE(mcbsp->io_base, WAKEUPEN,

					XRDYEN | RRDYEN);

		} else {

			syscon |= SIDLEMODE(0x01);

		}

		spin_unlock_irq(&mcbsp->lock);



		OMAP_MCBSP_WRITE(mcbsp->io_base, SYSCON, syscon);

	}

}



static inline void omap34xx_mcbsp_free(struct omap_mcbsp *mcbsp)

{

	/*

	 * Disable wakup behavior, smart idle and all wakeups

	 */

	if (cpu_is_omap34xx()) {

		u16 syscon;



		syscon = OMAP_MCBSP_READ(mcbsp->io_base, SYSCON);

		syscon &= ~(ENAWAKEUP | SIDLEMODE(0x03) | CLOCKACTIVITY(0x03));

		/*

		 * HW bug workaround - If no_idle mode is taken, we need to

		 * go to smart_idle before going to always_idle, or the

		 * device will not hit retention anymore.

		 */

		syscon |= SIDLEMODE(0x02);

		OMAP_MCBSP_WRITE(mcbsp->io_base, SYSCON, syscon);



		syscon &= ~(SIDLEMODE(0x03));

		OMAP_MCBSP_WRITE(mcbsp->io_base, SYSCON, syscon);



		OMAP_MCBSP_WRITE(mcbsp->io_base, WAKEUPEN, 0);

	}

}

#else

static inline void omap34xx_mcbsp_request(struct omap_mcbsp *mcbsp) {}

static inline void omap34xx_mcbsp_free(struct omap_mcbsp *mcbsp) {}

#endif



/*

 * We can choose between IRQ based or polled IO.

 * This needs to be called before omap_mcbsp_request().
@@ -257,6 +421,9 @@ int omap_mcbsp_request(unsigned int id) 
	clk_enable(mcbsp->iclk);

	clk_enable(mcbsp->fclk);



	/* Do procedure specific to omap34xx arch, if applicable */

	omap34xx_mcbsp_request(mcbsp);



	/*

	 * Make sure that transmitter, receiver and sample-rate generator are

	 * not running before activating IRQs.
@@ -305,6 +472,9 @@ void omap_mcbsp_free(unsigned int id) 
	if (mcbsp->pdata && mcbsp->pdata->ops && mcbsp->pdata->ops->free)

		mcbsp->pdata->ops->free(id);



	/* Do procedure specific to omap34xx arch, if applicable */

	omap34xx_mcbsp_free(mcbsp);



	clk_disable(mcbsp->fclk);

	clk_disable(mcbsp->iclk);
@@ -328,14 +498,15 @@ void omap_mcbsp_free(unsigned int id) 
EXPORT_SYMBOL(omap_mcbsp_free);



/*

 * Here we start the McBSP, by enabling the sample

 * generator, both transmitter and receivers,

 * and the frame sync.

 * Here we start the McBSP, by enabling transmitter, receiver or both.

 * If no transmitter or receiver is active prior calling, then sample-rate

 * generator and frame sync are started.

 */

void omap_mcbsp_start(unsigned int id)

void omap_mcbsp_start(unsigned int id, int tx, int rx)

{

	struct omap_mcbsp *mcbsp;

	void __iomem *io_base;

	int idle;

	u16 w;



	if (!omap_mcbsp_check_valid_id(id)) {
@@ -348,32 +519,58 @@ void omap_mcbsp_start(unsigned int id) 
	mcbsp->rx_word_length = (OMAP_MCBSP_READ(io_base, RCR1) >> 5) & 0x7;

	mcbsp->tx_word_length = (OMAP_MCBSP_READ(io_base, XCR1) >> 5) & 0x7;



	idle = !((OMAP_MCBSP_READ(io_base, SPCR2) |

		  OMAP_MCBSP_READ(io_base, SPCR1)) & 1);



	if (idle) {

		/* Start the sample generator */

		w = OMAP_MCBSP_READ(io_base, SPCR2);

		OMAP_MCBSP_WRITE(io_base, SPCR2, w | (1 << 6));

	}



	/* Enable transmitter and receiver */

	tx &= 1;

	w = OMAP_MCBSP_READ(io_base, SPCR2);

	OMAP_MCBSP_WRITE(io_base, SPCR2, w | 1);

	OMAP_MCBSP_WRITE(io_base, SPCR2, w | tx);



	rx &= 1;

	w = OMAP_MCBSP_READ(io_base, SPCR1);

	OMAP_MCBSP_WRITE(io_base, SPCR1, w | 1);

	OMAP_MCBSP_WRITE(io_base, SPCR1, w | rx);



	udelay(100);

	/*

	 * Worst case: CLKSRG*2 = 8000khz: (1/8000) * 2 * 2 usec

	 * REVISIT: 100us may give enough time for two CLKSRG, however

	 * due to some unknown PM related, clock gating etc. reason it

	 * is now at 500us.

	 */

	udelay(500);



	if (idle) {

		/* Start frame sync */

		w = OMAP_MCBSP_READ(io_base, SPCR2);

		OMAP_MCBSP_WRITE(io_base, SPCR2, w | (1 << 7));

	}



	if (cpu_is_omap2430() || cpu_is_omap34xx()) {

		/* Release the transmitter and receiver */

		w = OMAP_MCBSP_READ(io_base, XCCR);

		w &= ~(tx ? XDISABLE : 0);

		OMAP_MCBSP_WRITE(io_base, XCCR, w);

		w = OMAP_MCBSP_READ(io_base, RCCR);

		w &= ~(rx ? RDISABLE : 0);

		OMAP_MCBSP_WRITE(io_base, RCCR, w);

	}



	/* Dump McBSP Regs */

	omap_mcbsp_dump_reg(id);

}

EXPORT_SYMBOL(omap_mcbsp_start);



void omap_mcbsp_stop(unsigned int id)

void omap_mcbsp_stop(unsigned int id, int tx, int rx)

{

	struct omap_mcbsp *mcbsp;

	void __iomem *io_base;

	int idle;

	u16 w;



	if (!omap_mcbsp_check_valid_id(id)) {
@@ -385,17 +582,34 @@ void omap_mcbsp_stop(unsigned int id) 
	io_base = mcbsp->io_base;



	/* Reset transmitter */

	tx &= 1;

	if (cpu_is_omap2430() || cpu_is_omap34xx()) {

		w = OMAP_MCBSP_READ(io_base, XCCR);

		w |= (tx ? XDISABLE : 0);

		OMAP_MCBSP_WRITE(io_base, XCCR, w);

	}

	w = OMAP_MCBSP_READ(io_base, SPCR2);

	OMAP_MCBSP_WRITE(io_base, SPCR2, w & ~(1));

	OMAP_MCBSP_WRITE(io_base, SPCR2, w & ~tx);



	/* Reset receiver */

	rx &= 1;

	if (cpu_is_omap2430() || cpu_is_omap34xx()) {

		w = OMAP_MCBSP_READ(io_base, RCCR);

		w |= (tx ? RDISABLE : 0);

		OMAP_MCBSP_WRITE(io_base, RCCR, w);

	}

	w = OMAP_MCBSP_READ(io_base, SPCR1);

	OMAP_MCBSP_WRITE(io_base, SPCR1, w & ~(1));

	OMAP_MCBSP_WRITE(io_base, SPCR1, w & ~rx);



	idle = !((OMAP_MCBSP_READ(io_base, SPCR2) |

		  OMAP_MCBSP_READ(io_base, SPCR1)) & 1);



	if (idle) {

		/* Reset the sample rate generator */

		w = OMAP_MCBSP_READ(io_base, SPCR2);

		OMAP_MCBSP_WRITE(io_base, SPCR2, w & ~(1 << 6));

	}

}

EXPORT_SYMBOL(omap_mcbsp_stop);



/* polled mcbsp i/o operations */
@@ -883,6 +1097,149 @@ void omap_mcbsp_set_spi_mode(unsigned int id, 
}

EXPORT_SYMBOL(omap_mcbsp_set_spi_mode);



#ifdef CONFIG_ARCH_OMAP34XX

#define max_thres(m)			(mcbsp->pdata->buffer_size)

#define valid_threshold(m, val)		((val) <= max_thres(m))

#define THRESHOLD_PROP_BUILDER(prop)					\

static ssize_t prop##_show(struct device *dev,				\

			struct device_attribute *attr, char *buf)	\

{									\

	struct omap_mcbsp *mcbsp = dev_get_drvdata(dev);		\

									\

	return sprintf(buf, "%u\n", mcbsp->prop);			\

}									\

									\

static ssize_t prop##_store(struct device *dev,				\

				struct device_attribute *attr,		\

				const char *buf, size_t size)		\

{									\

	struct omap_mcbsp *mcbsp = dev_get_drvdata(dev);		\

	unsigned long val;						\

	int status;							\

									\

	status = strict_strtoul(buf, 0, &val);				\

	if (status)							\

		return status;						\

									\

	if (!valid_threshold(mcbsp, val))				\

		return -EDOM;						\

									\

	mcbsp->prop = val;						\

	return size;							\

}									\

									\

static DEVICE_ATTR(prop, 0644, prop##_show, prop##_store);



THRESHOLD_PROP_BUILDER(max_tx_thres);

THRESHOLD_PROP_BUILDER(max_rx_thres);



static const char *dma_op_modes[] = {

	"element", "threshold", "frame",

};



static ssize_t dma_op_mode_show(struct device *dev,

			struct device_attribute *attr, char *buf)

{

	struct omap_mcbsp *mcbsp = dev_get_drvdata(dev);

	int dma_op_mode, i = 0;

	ssize_t len = 0;

	const char * const *s;



	spin_lock_irq(&mcbsp->lock);

	dma_op_mode = mcbsp->dma_op_mode;

	spin_unlock_irq(&mcbsp->lock);



	for (s = &dma_op_modes[i]; i < ARRAY_SIZE(dma_op_modes); s++, i++) {

		if (dma_op_mode == i)

			len += sprintf(buf + len, "[%s] ", *s);

		else

			len += sprintf(buf + len, "%s ", *s);

	}

	len += sprintf(buf + len, "\n");



	return len;

}



static ssize_t dma_op_mode_store(struct device *dev,

				struct device_attribute *attr,

				const char *buf, size_t size)

{

	struct omap_mcbsp *mcbsp = dev_get_drvdata(dev);

	const char * const *s;

	int i = 0;



	for (s = &dma_op_modes[i]; i < ARRAY_SIZE(dma_op_modes); s++, i++)

		if (sysfs_streq(buf, *s))

			break;



	if (i == ARRAY_SIZE(dma_op_modes))

		return -EINVAL;



	spin_lock_irq(&mcbsp->lock);

	if (!mcbsp->free) {

		size = -EBUSY;

		goto unlock;

	}

	mcbsp->dma_op_mode = i;



unlock:

	spin_unlock_irq(&mcbsp->lock);



	return size;

}



static DEVICE_ATTR(dma_op_mode, 0644, dma_op_mode_show, dma_op_mode_store);



static const struct attribute *additional_attrs[] = {

	&dev_attr_max_tx_thres.attr,

	&dev_attr_max_rx_thres.attr,

	&dev_attr_dma_op_mode.attr,

	NULL,

};



static const struct attribute_group additional_attr_group = {

	.attrs = (struct attribute **)additional_attrs,

};



static inline int __devinit omap_additional_add(struct device *dev)

{

	return sysfs_create_group(&dev->kobj, &additional_attr_group);

}



static inline void __devexit omap_additional_remove(struct device *dev)

{

	sysfs_remove_group(&dev->kobj, &additional_attr_group);

}



static inline void __devinit omap34xx_device_init(struct omap_mcbsp *mcbsp)

{

	mcbsp->dma_op_mode = MCBSP_DMA_MODE_ELEMENT;

	if (cpu_is_omap34xx()) {

		mcbsp->max_tx_thres = max_thres(mcbsp);

		mcbsp->max_rx_thres = max_thres(mcbsp);

		/*

		 * REVISIT: Set dmap_op_mode to THRESHOLD as default

		 * for mcbsp2 instances.

		 */

		if (omap_additional_add(mcbsp->dev))

			dev_warn(mcbsp->dev,

				"Unable to create additional controls\n");

	} else {

		mcbsp->max_tx_thres = -EINVAL;

		mcbsp->max_rx_thres = -EINVAL;

	}

}



static inline void __devexit omap34xx_device_exit(struct omap_mcbsp *mcbsp)

{

	if (cpu_is_omap34xx())

		omap_additional_remove(mcbsp->dev);

}

#else

static inline void __devinit omap34xx_device_init(struct omap_mcbsp *mcbsp) {}

static inline void __devexit omap34xx_device_exit(struct omap_mcbsp *mcbsp) {}

#endif /* CONFIG_ARCH_OMAP34XX */



/*

 * McBSP1 and McBSP3 are directly mapped on 1610 and 1510.

 * 730 has only 2 McBSP, and both of them are MPU peripherals.
@@ -953,6 +1310,10 @@ static int __devinit omap_mcbsp_probe(struct platform_device *pdev) 
	mcbsp->dev = &pdev->dev;

	mcbsp_ptr[id] = mcbsp;

	platform_set_drvdata(pdev, mcbsp);



	/* Initialize mcbsp properties for OMAP34XX if needed / applicable */

	omap34xx_device_init(mcbsp);



	return 0;



err_fclk:
@@ -976,6 +1337,8 @@ static int __devexit omap_mcbsp_remove(struct platform_device *pdev) 
				mcbsp->pdata->ops->free)

			mcbsp->pdata->ops->free(mcbsp->id);



		omap34xx_device_exit(mcbsp);



		clk_disable(mcbsp->fclk);

		clk_disable(mcbsp->iclk);

		clk_put(mcbsp->fclk);

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