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mmc: sh_mobile_sdhi: properly document R-Car versions 

Replace hardcoded values with meaningful names and document what we
know.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Wolfram Sang 2016-05-11 14:46:00 +02:00 committed by Ulf Hansson
parent 523d939ef9
commit a2a16c77a1
1 changed files with 10 additions and 4 deletions
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14
drivers/mmc/host/sh_mobile_sdhi.c
View File

@ -39,6 +39,12 @@
#define EXT_ACC 0xe4
#define SDHI_VER_GEN2_SDR50 0x490c
/* very old datasheets said 0x490c for SDR104, too. They are wrong! */
#define SDHI_VER_GEN2_SDR104 0xcb0d
#define SDHI_VER_GEN3_SD 0xcc10
#define SDHI_VER_GEN3_SDMMC 0xcd10
#define host_to_priv(host) container_of((host)->pdata, struct sh_mobile_sdhi, mmc_data)
struct sh_mobile_sdhi_of_data {
@ -109,14 +115,14 @@ static void sh_mobile_sdhi_sdbuf_width(struct tmio_mmc_host *host, int width)
* sh_mobile_sdhi_of_data :: dma_buswidth
*/
switch (sd_ctrl_read16(host, CTL_VERSION)) {
case 0x490C:
case SDHI_VER_GEN2_SDR50:
val = (width == 32) ? 0x0001 : 0x0000;
break;
case 0xCB0D:
case SDHI_VER_GEN2_SDR104:
val = (width == 32) ? 0x0000 : 0x0001;
break;
case 0xCC10: /* Gen3, SD only */
case 0xCD10: /* Gen3, SD + MMC */
case SDHI_VER_GEN3_SD:
case SDHI_VER_GEN3_SDMMC:
if (width == 64)
val = 0x0000;
else if (width == 32)