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Commit 0acce82b authored by Peter Ujfalusi's avatar Peter Ujfalusi Committed by Liam Girdwood
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OMAP: McBSP: Function to query the FIFO size 



Users of McBSP can use the omap_mcbsp_get_fifo_size function to query
the size of the McBSP FIFO.
The function will return the FIFO size in words (the HW maximum).

Signed-off-by: default avatarPeter Ujfalusi <peter.ujfalusi@nokia.com>
Acked-by: default avatarJarkko Nikula <jhnikula@gmail.com>
Acked-by: default avatarMark Brown <broonie@opensource.wolsfonmicro.com>
Acked-by: default avatarTony Lindgren <tony@atomide.com>
Signed-off-by: default avatarLiam Girdwood <lrg@slimlogic.co.uk>
parent 1fab79b8

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

+2 −0
Original line number Diff line number Diff line
@@ -473,6 +473,7 @@ 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);

u16 omap_mcbsp_get_fifo_size(unsigned int id);

u16 omap_mcbsp_get_tx_delay(unsigned int id);

u16 omap_mcbsp_get_rx_delay(unsigned int id);

int omap_mcbsp_get_dma_op_mode(unsigned int id);
@@ -483,6 +484,7 @@ 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 u16 omap_mcbsp_get_fifo_size(unsigned int id) { return 0; }

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

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

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

arch/arm/plat-omap/mcbsp.c

+14 −0
Original line number Diff line number Diff line
@@ -560,6 +560,20 @@ u16 omap_mcbsp_get_max_rx_threshold(unsigned int id) 
}

EXPORT_SYMBOL(omap_mcbsp_get_max_rx_threshold);



u16 omap_mcbsp_get_fifo_size(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->pdata->buffer_size;

}

EXPORT_SYMBOL(omap_mcbsp_get_fifo_size);



#define MCBSP2_FIFO_SIZE	0x500 /* 1024 + 256 locations */

#define MCBSP1345_FIFO_SIZE	0x80  /* 128 locations */

/*