diff options
| author | Anand Gadiyar <gadiyar@ti.com> | 2009-12-28 14:40:35 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-03-03 01:53:41 +0300 |
| commit | 452f0394376d2cc882e4c4a593fc290c042799a9 (patch) | |
| tree | 0071878a06df34b5245d181f41833a14ca4e2918 /drivers | |
| parent | 3b151526eda87901532390e11bba0dd59119f667 (diff) | |
| download | linux-452f0394376d2cc882e4c4a593fc290c042799a9.tar.xz | |
usb: musb: hsdma: add wrapper for reading DMA count
Add a wrapper for reading the DMA count register, analogous
to the one for writing to this register.
Signed-off-by: Anand Gadiyar <gadiyar@ti.com>
Cc: Vikram Pandita <vikram.pandita@ti.com>
Signed-off-by: Felipe Balbi <felipe.balbi@nokia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/usb/musb/musbhsdma.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/usb/musb/musbhsdma.h b/drivers/usb/musb/musbhsdma.h index 1299d92dc83f..613f95a058f7 100644 --- a/drivers/usb/musb/musbhsdma.h +++ b/drivers/usb/musb/musbhsdma.h @@ -55,6 +55,10 @@ MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_ADDRESS), \ addr) +#define musb_read_hsdma_count(mbase, bchannel) \ + musb_readl(mbase, \ + MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_COUNT)) + #define musb_write_hsdma_count(mbase, bchannel, len) \ musb_writel(mbase, \ MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_COUNT), \ @@ -96,6 +100,19 @@ static inline void musb_write_hsdma_addr(void __iomem *mbase, ((u16)(((u32) dma_addr >> 16) & 0xFFFF))); } +static inline u32 musb_read_hsdma_count(void __iomem *mbase, u8 bchannel) +{ + u32 count = musb_readw(mbase, + MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_COUNT_HIGH)); + + count = count << 16; + + count |= musb_readw(mbase, + MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_COUNT_LOW)); + + return count; +} + static inline void musb_write_hsdma_count(void __iomem *mbase, u8 bchannel, u32 len) { |