From a2a16c77a1a2c951b5930c3182e2737cb13e1a53 Mon Sep 17 00:00:00 2001 From: Wolfram Sang Date: Wed, 11 May 2016 14:46:00 +0200 Subject: [PATCH] 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 Reviewed-by: Simon Horman Signed-off-by: Ulf Hansson --- drivers/mmc/host/sh_mobile_sdhi.c | 14 ++++++++++---- 1 file changed, 10 insertions(+), 4 deletions(-) diff --git a/drivers/mmc/host/sh_mobile_sdhi.c b/drivers/mmc/host/sh_mobile_sdhi.c index f750f9494410..c3b651bf89cb 100644 --- a/drivers/mmc/host/sh_mobile_sdhi.c +++ b/drivers/mmc/host/sh_mobile_sdhi.c @@ -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) -- 2.39.5