diff options
| author | Philippe Langlais <philippe.langlais@linaro.org> | 2012-01-17 17:40:40 +0100 |
|---|---|---|
| committer | Philippe Langlais <philippe.langlais@stericsson.com> | 2012-05-22 11:02:56 +0200 |
| commit | 746fe9c108ae7cc79da9ccf1437b97db98444516 (patch) | |
| tree | b487f77259fa90a9b6c5996f04f6f0c5b37c6cdb /drivers/dma/ste_dma40.c | |
| parent | ff4005a408d67e9b5a1aa781d2ca916ef763fe91 (diff) | |
dma40: Add the needed functions for STE audio support
Come from commit "dma40: update" Author: Rabin Vincent <rabin.vincent@stericsson.com>
Signed-off-by: Philippe Langlais <philippe.langlais@linaro.org>
Diffstat (limited to 'drivers/dma/ste_dma40.c')
| -rw-r--r-- | drivers/dma/ste_dma40.c | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/drivers/dma/ste_dma40.c b/drivers/dma/ste_dma40.c index 6312131149c..1c20b4ebc8b 100644 --- a/drivers/dma/ste_dma40.c +++ b/drivers/dma/ste_dma40.c @@ -2648,6 +2648,56 @@ static int d40_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd, return -ENXIO; } +dma_addr_t stedma40_get_src_addr(struct dma_chan *chan) +{ + struct d40_chan *d40c = container_of(chan, struct d40_chan, chan); + dma_addr_t addr; + + if (chan_is_physical(d40c)) + addr = readl(d40c->base->virtbase + D40_DREG_PCBASE + + d40c->phy_chan->num * D40_DREG_PCDELTA + + D40_CHAN_REG_SSPTR); + else { + unsigned long lower; + unsigned long upper; + + /* + * There is a potential for overflow between the time the two + * halves of the pointer are read. + */ + lower = d40c->lcpa->lcsp0 & D40_MEM_LCSP0_SPTR_MASK; + upper = d40c->lcpa->lcsp1 & D40_MEM_LCSP1_SPTR_MASK; + + addr = upper | lower; + } + + return addr; +} +EXPORT_SYMBOL(stedma40_get_src_addr); + +dma_addr_t stedma40_get_dst_addr(struct dma_chan *chan) +{ + struct d40_chan *d40c = container_of(chan, struct d40_chan, chan); + dma_addr_t addr; + + if (chan_is_physical(d40c)) + addr = readl(d40c->base->virtbase + D40_DREG_PCBASE + + d40c->phy_chan->num * D40_DREG_PCDELTA + + D40_CHAN_REG_SDPTR); + else { + unsigned long lower; + unsigned long upper; + + lower = d40c->lcpa->lcsp2 & D40_MEM_LCSP2_DPTR_MASK; + upper = d40c->lcpa->lcsp3 & D40_MEM_LCSP3_DPTR_MASK; + + addr = upper | lower; + } + + return addr; +} +EXPORT_SYMBOL(stedma40_get_dst_addr); + /* Initialization functions */ static void __init d40_chan_init(struct d40_base *base, struct dma_device *dma, |