[U-Boot] [PATCH v1 6/7] mmc: fsl_esdhc: Add emmc hs200 support

[Peng Fan]

> Subject: [U-Boot] [PATCH v1 6/7] mmc: fsl_esdhc: Add emmc hs200 support
> 
> Add eMMC hs200 mode support for increasing ls1028/ls1012/lx2160 eMMC
> work performance, but without tuning procedure which will cause mmc
> doesn't work. and this should be TODO work.
> 
> Signed-off-by: Yinbo Zhu <yinbo.zhu at nxp.com>

Acked-by: Peng Fan <peng.fan at nxp.com>

> ---
>  drivers/mmc/fsl_esdhc.c | 34 +++++++++++++++++++---------------
>  include/fsl_esdhc.h     |  4 ++++
>  2 files changed, 23 insertions(+), 15 deletions(-)
> 
> diff --git a/drivers/mmc/fsl_esdhc.c b/drivers/mmc/fsl_esdhc.c index
> 07318472a7..28d2312ef7 100644
> --- a/drivers/mmc/fsl_esdhc.c
> +++ b/drivers/mmc/fsl_esdhc.c
> @@ -395,10 +395,6 @@ static int esdhc_send_cmd_common(struct
> fsl_esdhc_priv *priv, struct mmc *mmc,
>  	esdhc_write32(&regs->cmdarg, cmd->cmdarg);
>  	esdhc_write32(&regs->xfertyp, xfertyp);
> 
> -	if ((cmd->cmdidx == MMC_CMD_SEND_TUNING_BLOCK) ||
> -	    (cmd->cmdidx == MMC_CMD_SEND_TUNING_BLOCK_HS200))
> -		flags = IRQSTAT_BRR;
> -
>  	/* Wait for the command to complete */
>  	start = get_timer(0);
>  	while (!(esdhc_read32(&regs->irqstat) & flags)) { @@ -458,12 +454,6
> @@ static int esdhc_send_cmd_common(struct fsl_esdhc_priv *priv, struct
> mmc *mmc,  #ifdef CONFIG_SYS_FSL_ESDHC_USE_PIO
>  		esdhc_pio_read_write(priv, data);
>  #else
> -		flags = DATA_COMPLETE;
> -		if ((cmd->cmdidx == MMC_CMD_SEND_TUNING_BLOCK) ||
> -		    (cmd->cmdidx == MMC_CMD_SEND_TUNING_BLOCK_HS200))
> {
> -			flags = IRQSTAT_BRR;
> -		}
> -
>  		do {
>  			irqstat = esdhc_read32(&regs->irqstat);
> 
> @@ -476,7 +466,7 @@ static int esdhc_send_cmd_common(struct
> fsl_esdhc_priv *priv, struct mmc *mmc,
>  				err = -ECOMM;
>  				goto out;
>  			}
> -		} while ((irqstat & flags) != flags);
> +		} while ((irqstat & DATA_COMPLETE) != DATA_COMPLETE);
> 
>  		/*
>  		 * Need invalidate the dcache here again to avoid any @@ -517,7
> +507,9 @@ static void set_sysctl(struct fsl_esdhc_priv *priv, struct mmc
> *mmc, uint clock)
>  	int div = 1;
>  	int pre_div = 2;
>  	int ddr_pre_div = mmc->ddr_mode ? 2 : 1;
> -	int sdhc_clk = priv->sdhc_clk;
> +	unsigned int sdhc_clk = priv->sdhc_clk;
> +	u32 time_out;
> +	u32 value;
>  	uint clk;
> 
>  	if (clock < mmc->cfg->f_min)
> @@ -538,11 +530,18 @@ static void set_sysctl(struct fsl_esdhc_priv *priv,
> struct mmc *mmc, uint clock)
> 
>  	esdhc_clrsetbits32(&regs->sysctl, SYSCTL_CLOCK_MASK, clk);
> 
> -	udelay(10000);
> +	time_out = 20;
> +	value = PRSSTAT_SDSTB;
> +	while (!(esdhc_read32(&regs->prsstat) & value)) {
> +		if (time_out == 0) {
> +			printf("fsl_esdhc: Internal clock never stabilised.\n");
> +			break;
> +		}
> +		time_out--;
> +		mdelay(1);
> +	}
> 
>  	esdhc_setbits32(&regs->sysctl, SYSCTL_PEREN | SYSCTL_CKEN);
> -
> -	priv->clock = clock;
>  }
> 
>  #ifdef CONFIG_FSL_ESDHC_USE_PERIPHERAL_CLK
> @@ -1024,6 +1023,8 @@ static int fsl_esdhc_probe(struct udevice *dev)
>  		return ret;
>  	}
> 
> +	mmc_of_parse(dev, &plat->cfg);
> +
>  	mmc = &plat->mmc;
>  	mmc->cfg = &plat->cfg;
>  	mmc->dev = dev;
> @@ -1081,6 +1082,9 @@ static const struct dm_mmc_ops fsl_esdhc_ops = {
>  	.get_cd		= fsl_esdhc_get_cd,
>  	.send_cmd	= fsl_esdhc_send_cmd,
>  	.set_ios	= fsl_esdhc_set_ios,
> +#ifdef MMC_SUPPORTS_TUNING
> +	.execute_tuning = fsl_esdhc_execute_tuning, #endif
>  };
>  #endif
> 
> diff --git a/include/fsl_esdhc.h b/include/fsl_esdhc.h index
> 7d7e946ab3..3f496b4cea 100644
> --- a/include/fsl_esdhc.h
> +++ b/include/fsl_esdhc.h
> @@ -205,6 +205,10 @@ struct fsl_esdhc_cfg {  int fsl_esdhc_mmc_init(bd_t
> *bis);  int fsl_esdhc_initialize(bd_t *bis, struct fsl_esdhc_cfg *cfg);  void
> fdt_fixup_esdhc(void *blob, bd_t *bd);
> +#ifdef MMC_SUPPORTS_TUNING
> +static inline int fsl_esdhc_execute_tuning(struct udevice *dev,
> +	uint32_t opcode) {return 0; }
> +#endif
>  #else
>  static inline int fsl_esdhc_mmc_init(bd_t *bis) { return -ENOSYS; }  static
> inline void fdt_fixup_esdhc(void *blob, bd_t *bd) {}
> --
> 2.17.1
> 
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