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| author | andrew <andrew@FreeBSD.org> | 2015-08-27 13:08:45 +0000 |
|---|---|---|
| committer | andrew <andrew@FreeBSD.org> | 2015-08-27 13:08:45 +0000 |
| commit | 6bd79f6a5ac18d90ce49a0e60e3ad037f490b6a2 (patch) | |
| tree | 8f03c77044bc9bd227efa1caf59d48ac14a4204a /sys/dev/mmc | |
| parent | 761d6ba63348da0878796c51e4f4e6c186e13a2c (diff) | |
| download | FreeBSD-src-6bd79f6a5ac18d90ce49a0e60e3ad037f490b6a2.zip FreeBSD-src-6bd79f6a5ac18d90ce49a0e60e3ad037f490b6a2.tar.gz | |
Allow us to select the transfer count. This allows us to work with hardware
that seems to only work with a single block at a time.
Sponsored by: ABT Systems Ltd
Diffstat (limited to 'sys/dev/mmc')
| -rw-r--r-- | sys/dev/mmc/host/dwmmc.c | 16 |
1 files changed, 9 insertions, 7 deletions
diff --git a/sys/dev/mmc/host/dwmmc.c b/sys/dev/mmc/host/dwmmc.c index 1d2dac2..b7cca1b 100644 --- a/sys/dev/mmc/host/dwmmc.c +++ b/sys/dev/mmc/host/dwmmc.c @@ -111,8 +111,8 @@ struct idmac_desc { uint32_t des3; /* buf2 phys addr or next descr */ }; -#define DESC_COUNT 256 -#define DESC_SIZE (sizeof(struct idmac_desc) * DESC_COUNT) +#define DESC_MAX 256 +#define DESC_SIZE (sizeof(struct idmac_desc) * DESC_MAX) #define DEF_MSIZE 0x2 /* Burst size of multiple transaction */ struct dwmmc_softc { @@ -130,6 +130,7 @@ struct dwmmc_softc { uint32_t use_auto_stop; uint32_t use_pio; uint32_t pwren_inverted; + u_int desc_count; bus_dma_tag_t desc_tag; bus_dmamap_t desc_map; @@ -283,10 +284,10 @@ dma_setup(struct dwmmc_softc *sc) return (1); } - for (idx = 0; idx < DESC_COUNT; idx++) { + for (idx = 0; idx < sc->desc_count; idx++) { sc->desc_ring[idx].des0 = DES0_CH; sc->desc_ring[idx].des1 = 0; - nidx = (idx + 1) % DESC_COUNT; + nidx = (idx + 1) % sc->desc_count; sc->desc_ring[idx].des3 = sc->desc_ring_paddr + \ (nidx * sizeof(struct idmac_desc)); } @@ -297,8 +298,8 @@ dma_setup(struct dwmmc_softc *sc) BUS_SPACE_MAXADDR_32BIT, /* lowaddr */ BUS_SPACE_MAXADDR, /* highaddr */ NULL, NULL, /* filter, filterarg */ - DESC_COUNT*MMC_SECTOR_SIZE, /* maxsize */ - DESC_COUNT, /* nsegments */ + sc->desc_count * MMC_SECTOR_SIZE, /* maxsize */ + sc->desc_count, /* nsegments */ MMC_SECTOR_SIZE, /* maxsegsize */ 0, /* flags */ NULL, NULL, /* lockfunc, lockarg */ @@ -578,6 +579,7 @@ dwmmc_attach(device_t dev) sc->use_pio = 0; sc->pwren_inverted = 0; + sc->desc_count = DESC_MAX; if ((sc->hwtype & HWTYPE_MASK) == HWTYPE_ROCKCHIP) { sc->use_pio = 1; @@ -1131,7 +1133,7 @@ dwmmc_read_ivar(device_t bus, device_t child, int which, uintptr_t *result) *(int *)result = sc->host.caps; break; case MMCBR_IVAR_MAX_DATA: - *(int *)result = DESC_COUNT; + *(int *)result = sc->desc_count; } return (0); } |
