diff options
Diffstat (limited to 'drivers/dma')
| -rw-r--r-- | drivers/dma/dw_dmac.c | 33 |
1 files changed, 20 insertions, 13 deletions
diff --git a/drivers/dma/dw_dmac.c b/drivers/dma/dw_dmac.c index 76301c4ba1ad..635a4a5d31ae 100644 --- a/drivers/dma/dw_dmac.c +++ b/drivers/dma/dw_dmac.c @@ -47,13 +47,29 @@ static inline unsigned int dwc_get_sms(struct dw_dma_slave *slave) return slave ? slave->src_master : 1; } +#define SRC_MASTER 0 +#define DST_MASTER 1 + +static inline unsigned int dwc_get_master(struct dma_chan *chan, int master) +{ + struct dw_dma *dw = to_dw_dma(chan->device); + struct dw_dma_slave *dws = chan->private; + unsigned int m; + + if (master == SRC_MASTER) + m = dwc_get_sms(dws); + else + m = dwc_get_dms(dws); + + return min_t(unsigned int, dw->nr_masters - 1, m); +} + #define DWC_DEFAULT_CTLLO(_chan) ({ \ - struct dw_dma_slave *__slave = (_chan->private); \ struct dw_dma_chan *_dwc = to_dw_dma_chan(_chan); \ struct dma_slave_config *_sconfig = &_dwc->dma_sconfig; \ bool _is_slave = is_slave_direction(_dwc->direction); \ - int _dms = dwc_get_dms(__slave); \ - int _sms = dwc_get_sms(__slave); \ + int _dms = dwc_get_master(_chan, DST_MASTER); \ + int _sms = dwc_get_master(_chan, SRC_MASTER); \ u8 _smsize = _is_slave ? _sconfig->src_maxburst : \ DW_DMA_MSIZE_16; \ u8 _dmsize = _is_slave ? _sconfig->dst_maxburst : \ @@ -74,20 +90,11 @@ static inline unsigned int dwc_get_sms(struct dw_dma_slave *slave) */ #define NR_DESCS_PER_CHANNEL 64 -#define SRC_MASTER 0 -#define DST_MASTER 1 - static inline unsigned int dwc_get_data_width(struct dma_chan *chan, int master) { struct dw_dma *dw = to_dw_dma(chan->device); - struct dw_dma_slave *dws = chan->private; - - if (master == SRC_MASTER) - return dw->data_width[dwc_get_sms(dws)]; - else if (master == DST_MASTER) - return dw->data_width[dwc_get_dms(dws)]; - return 0; + return dw->data_width[dwc_get_master(chan, master)]; } /*----------------------------------------------------------------------*/ |