diff options
Diffstat (limited to 'drivers/mmc')
| -rw-r--r-- | drivers/mmc/sh_mmcif.c | 19 | ||||
| -rw-r--r-- | drivers/mmc/sh_mmcif.h | 8 |
2 files changed, 16 insertions, 11 deletions
diff --git a/drivers/mmc/sh_mmcif.c b/drivers/mmc/sh_mmcif.c index ed83a14..76ba93b 100644 --- a/drivers/mmc/sh_mmcif.c +++ b/drivers/mmc/sh_mmcif.c @@ -103,20 +103,18 @@ static int mmcif_wait_interrupt_flag(struct sh_mmcif_host *host) static void sh_mmcif_clock_control(struct sh_mmcif_host *host, unsigned int clk) { - int i; - sh_mmcif_bitclr(CLK_ENABLE, &host->regs->ce_clk_ctrl); sh_mmcif_bitclr(CLK_CLEAR, &host->regs->ce_clk_ctrl); if (!clk) return; - if (clk == CLKDEV_EMMC_DATA) { + + if (clk == CLKDEV_EMMC_DATA) sh_mmcif_bitset(CLK_PCLK, &host->regs->ce_clk_ctrl); - } else { - for (i = 1; (unsigned int)host->clk / (1 << i) >= clk; i++) - ; - sh_mmcif_bitset((i - 1) << 16, &host->regs->ce_clk_ctrl); - } + else + sh_mmcif_bitset((fls(DIV_ROUND_UP(host->clk, + clk) - 1) - 1) << 16, + &host->regs->ce_clk_ctrl); sh_mmcif_bitset(CLK_ENABLE, &host->regs->ce_clk_ctrl); } @@ -581,8 +579,6 @@ static struct mmc_config sh_mmcif_cfg = { .host_caps = MMC_MODE_HS | MMC_MODE_HS_52MHz | MMC_MODE_4BIT | MMC_MODE_8BIT | MMC_MODE_HC, .voltages = MMC_VDD_32_33 | MMC_VDD_33_34, - .f_min = CLKDEV_MMC_INIT, - .f_max = CLKDEV_EMMC_DATA, .b_max = CONFIG_SYS_MMC_MAX_BLK_COUNT, }; @@ -599,6 +595,9 @@ int mmcif_mmc_init(void) host->regs = (struct sh_mmcif_regs *)CONFIG_SH_MMCIF_ADDR; host->clk = CONFIG_SH_MMCIF_CLK; + sh_mmcif_cfg.f_min = MMC_CLK_DIV_MIN(host->clk); + sh_mmcif_cfg.f_max = MMC_CLK_DIV_MAX(host->clk); + mmc = mmc_create(&sh_mmcif_cfg, host); if (mmc == NULL) { free(host); diff --git a/drivers/mmc/sh_mmcif.h b/drivers/mmc/sh_mmcif.h index bd6fbf7..4b6752f 100644 --- a/drivers/mmc/sh_mmcif.h +++ b/drivers/mmc/sh_mmcif.h @@ -199,7 +199,13 @@ struct sh_mmcif_regs { #define SOFT_RST_OFF (0 << 31) #define CLKDEV_EMMC_DATA 52000000 /* 52MHz */ -#define CLKDEV_MMC_INIT 400000 /* 100 - 400 KHz */ +#ifdef CONFIG_RMOBILE +#define MMC_CLK_DIV_MIN(clk) (clk / (1 << 9)) +#define MMC_CLK_DIV_MAX(clk) (clk / (1 << 1)) +#else +#define MMC_CLK_DIV_MIN(clk) (clk / (1 << 8)) +#define MMC_CLK_DIV_MAX(clk) CLKDEV_EMMC_DATA +#endif #define MMC_BUS_WIDTH_1 0 #define MMC_BUS_WIDTH_4 2 |