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dmaengine: ti: k3-udma: Use defines for capabilities register parsing

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Add defines for the CAP register fields to make the code self explaining.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Link: https://lore.kernel.org/r/20200717120903.8774-2-peter.ujfalusi@ti.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Peter Ujfalusi 2020-07-17 15:09:02 +03:00 committed by Vinod Koul
parent 4b545ebfc3
commit 44385c4171
2 changed files with 12 additions and 6 deletions
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12
drivers/dma/ti/k3-udma.c
View File

@ -3209,13 +3209,13 @@ static int udma_setup_resources(struct udma_dev *ud)
"ti,sci-rm-range-rchan",
"ti,sci-rm-range-rflow" };
cap2 = udma_read(ud->mmrs[MMR_GCFG], 0x28);
cap3 = udma_read(ud->mmrs[MMR_GCFG], 0x2c);
cap2 = udma_read(ud->mmrs[MMR_GCFG], UDMA_CAP_REG(2));
cap3 = udma_read(ud->mmrs[MMR_GCFG], UDMA_CAP_REG(3));
ud->rflow_cnt = cap3 & 0x3fff;
ud->tchan_cnt = cap2 & 0x1ff;
ud->echan_cnt = (cap2 >> 9) & 0x1ff;
ud->rchan_cnt = (cap2 >> 18) & 0x1ff;
ud->rflow_cnt = UDMA_CAP3_RFLOW_CNT(cap3);
ud->tchan_cnt = UDMA_CAP2_TCHAN_CNT(cap2);
ud->echan_cnt = UDMA_CAP2_ECHAN_CNT(cap2);
ud->rchan_cnt = UDMA_CAP2_RCHAN_CNT(cap2);
ch_count = ud->tchan_cnt + ud->rchan_cnt;
ud->tchan_map = devm_kmalloc_array(dev, BITS_TO_LONGS(ud->tchan_cnt),

6
drivers/dma/ti/k3-udma.h
View File

@ -37,6 +37,12 @@
#define UDMA_CHAN_RT_BCNT_REG 0x408
#define UDMA_CHAN_RT_SBCNT_REG 0x410
/* UDMA_CAP Registers */
#define UDMA_CAP2_TCHAN_CNT(val) ((val) & 0x1ff)
#define UDMA_CAP2_ECHAN_CNT(val) (((val) >> 9) & 0x1ff)
#define UDMA_CAP2_RCHAN_CNT(val) (((val) >> 18) & 0x1ff)
#define UDMA_CAP3_RFLOW_CNT(val) ((val) & 0x3fff)
/* UDMA_CHAN_RT_CTL_REG */
#define UDMA_CHAN_RT_CTL_EN BIT(31)
#define UDMA_CHAN_RT_CTL_TDOWN BIT(30)