diff options
| author | Peter Ujfalusi <peter.ujfalusi@ti.com> | 2015-10-16 09:18:04 +0200 |
|---|---|---|
| committer | Vinod Koul <vinod.koul@intel.com> | 2015-10-27 02:22:45 +0100 |
| commit | 633e42b8c5465acf03671be7bd2866c486816596 (patch) | |
| tree | 49215aadc669cefffeabfe92259357f0d5d35978 /drivers/dma | |
| parent | dmaengine: edma: Merge map_dmach_to_queue into assign_channel_eventq (diff) | |
| download | linux-633e42b8c5465acf03671be7bd2866c486816596.tar.xz linux-633e42b8c5465acf03671be7bd2866c486816596.zip | |
dmaengine: edma: Get qDMA channel information from HW also
Query the number of qDMA channels from CCCFG register.
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Diffstat (limited to 'drivers/dma')
| -rw-r--r-- | drivers/dma/edma.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/dma/edma.c b/drivers/dma/edma.c index eaf1f9e4bde0..ea851ab05c8e 100644 --- a/drivers/dma/edma.c +++ b/drivers/dma/edma.c @@ -107,6 +107,7 @@ /* CCCFG register */ #define GET_NUM_DMACH(x) (x & 0x7) /* bits 0-2 */ +#define GET_NUM_QDMACH(x) (x & 0x70 >> 4) /* bits 4-6 */ #define GET_NUM_PAENTRY(x) ((x & 0x7000) >> 12) /* bits 12-14 */ #define GET_NUM_EVQUE(x) ((x & 0x70000) >> 16) /* bits 16-18 */ #define GET_NUM_REGN(x) ((x & 0x300000) >> 20) /* bits 20-21 */ @@ -220,6 +221,7 @@ struct edma_cc { /* eDMA3 resource information */ unsigned num_channels; + unsigned num_qchannels; unsigned num_region; unsigned num_slots; unsigned num_tc; @@ -1819,6 +1821,9 @@ static int edma_setup_from_hw(struct device *dev, struct edma_soc_info *pdata, value = GET_NUM_DMACH(cccfg); ecc->num_channels = BIT(value + 1); + value = GET_NUM_QDMACH(cccfg); + ecc->num_qchannels = value * 2; + value = GET_NUM_PAENTRY(cccfg); ecc->num_slots = BIT(value + 4); @@ -1830,6 +1835,7 @@ static int edma_setup_from_hw(struct device *dev, struct edma_soc_info *pdata, dev_dbg(dev, "eDMA3 CC HW configuration (cccfg: 0x%08x):\n", cccfg); dev_dbg(dev, "num_region: %u\n", ecc->num_region); dev_dbg(dev, "num_channels: %u\n", ecc->num_channels); + dev_dbg(dev, "num_qchannels: %u\n", ecc->num_qchannels); dev_dbg(dev, "num_slots: %u\n", ecc->num_slots); dev_dbg(dev, "num_tc: %u\n", ecc->num_tc); dev_dbg(dev, "chmap_exist: %s\n", ecc->chmap_exist ? "yes" : "no"); |