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| author | Peter Ujfalusi | 2010-06-03 06:39:32 +0200 |
|---|---|---|
| committer | Liam Girdwood | 2010-06-03 17:12:39 +0200 |
| commit | 0acce82b3dd792c85079ca1f4f7ffd8c82427e0a (patch) | |
| tree | cb949d61ec72206474a1c8dd9a9bef3443fad128 /arch | |
| parent | Merge branch 'for-2.6.36' of git://git.kernel.org/pub/scm/linux/kernel/git/br... (diff) | |
| download | kernel-qcow2-linux-0acce82b3dd792c85079ca1f4f7ffd8c82427e0a.tar.gz kernel-qcow2-linux-0acce82b3dd792c85079ca1f4f7ffd8c82427e0a.tar.xz kernel-qcow2-linux-0acce82b3dd792c85079ca1f4f7ffd8c82427e0a.zip | |
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: Peter Ujfalusi <peter.ujfalusi@nokia.com>
Acked-by: Jarkko Nikula <jhnikula@gmail.com>
Acked-by: Mark Brown <broonie@opensource.wolsfonmicro.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/plat-omap/include/plat/mcbsp.h | 2 | ||||
| -rw-r--r-- | arch/arm/plat-omap/mcbsp.c | 14 |
2 files changed, 16 insertions, 0 deletions
diff --git a/arch/arm/plat-omap/include/plat/mcbsp.h b/arch/arm/plat-omap/include/plat/mcbsp.h index 975744f10a58..b4ff6a11a8f2 100644 --- a/arch/arm/plat-omap/include/plat/mcbsp.h +++ b/arch/arm/plat-omap/include/plat/mcbsp.h @@ -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; } diff --git a/arch/arm/plat-omap/mcbsp.c b/arch/arm/plat-omap/mcbsp.c index 7e669c9744d8..8bab0b28b7a3 100644 --- a/arch/arm/plat-omap/mcbsp.c +++ b/arch/arm/plat-omap/mcbsp.c @@ -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 */ /* |