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Commit 7aa9ff56 authored by Eduardo Valentin's avatar Eduardo Valentin Committed by Mark Brown
Browse files

OMAP: McBSP: Add transmit/receive threshold handler 



This patch adds a way to handle transmit/receive threshold.
It export to mcbsp users a callback registration procedure.

Signed-off-by: default avatarEduardo Valentin <eduardo.valentin@nokia.com>
Acked-by: default avatarTony Lindgren <tony@atomide.com>
Signed-off-by: default avatarMark Brown <broonie@opensource.wolfsonmicro.com>
parent 44a6311c

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

+9 −0
Original line number Diff line number Diff line
@@ -389,6 +389,15 @@ 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);

#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)

{ }

#endif

int omap_mcbsp_request(unsigned int id);

void omap_mcbsp_free(unsigned int id);

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

arch/arm/plat-omap/mcbsp.c

+50 −0
Original line number Diff line number Diff line
@@ -198,6 +198,56 @@ 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);

#endif



/*

 * We can choose between IRQ based or polled IO.

 * This needs to be called before omap_mcbsp_request().