[PATCH 3/4 V2] mmc: esdhc: Correct host version of T4240-R1.0

[Kumar Gala]

On Jul 17, 2013, at 5:11 AM, Haijun Zhang wrote:

> Vender version and sdhc spec version of T4240-R1.0 is incorrect.
> The right value should be VVN=0x13, SVN = 0x1. The wrong version
> number will break down the ADMA data transfer.
> This defect only exist in T4240-R1.0. Will be fixed in T4240-R2.0.
> Also share vvn and svr for public use.
> 
> Signed-off-by: Haijun Zhang <haijun.zhang at freescale.com>
> ---
> changes for V2:
> 	- Remove broken ADMA quirk.
> 	- Rebuild patch of  Add quirks to support T4240 board
> 
> drivers/mmc/host/sdhci-of-esdhc.c | 29 +++++++++++++----------------
> 1 file changed, 13 insertions(+), 16 deletions(-)
> 
> diff --git a/drivers/mmc/host/sdhci-of-esdhc.c b/drivers/mmc/host/sdhci-of-esdhc.c
> index adfaadd..570bca8 100644
> --- a/drivers/mmc/host/sdhci-of-esdhc.c
> +++ b/drivers/mmc/host/sdhci-of-esdhc.c
> @@ -26,7 +26,7 @@
> #define VENDOR_V_22	0x12
> #define VENDOR_V_23	0x13
> 
> -static u32 svr;
> +static u32 svr, vvn;
> 
> static u32 esdhc_readl(struct sdhci_host *host, int reg)
> {
> @@ -43,11 +43,9 @@ static u32 esdhc_readl(struct sdhci_host *host, int reg)
> 	 * For FSL eSDHC, must aligned 4-byte, so use 0xFC to read the
> 	 * the verdor version number, oxFE is SDHCI_HOST_VERSION.
> 	 */
> -	if ((reg == SDHCI_CAPABILITIES) && (ret & SDHCI_CAN_DO_ADMA1)) {
> -		u32 tmp = in_be32(host->ioaddr + SDHCI_SLOT_INT_STATUS);
> -		tmp = (tmp & SDHCI_VENDOR_VER_MASK) >> SDHCI_VENDOR_VER_SHIFT;
> -		if (tmp > VENDOR_V_22)
> -			ret |= SDHCI_CAN_DO_ADMA2;
> +	if ((reg == SDHCI_CAPABILITIES) && (ret & SDHCI_CAN_DO_ADMA1) &&
> +		(vvn > VENDOR_V_22)) {
> +		ret |= SDHCI_CAN_DO_ADMA2;
> 	}
> 
> 	return ret;
> @@ -63,6 +61,12 @@ static u16 esdhc_readw(struct sdhci_host *host, int reg)
> 		ret = in_be32(host->ioaddr + base) & 0xffff;
> 	else
> 		ret = (in_be32(host->ioaddr + base) >> shift) & 0xffff;
> +
> +	/* T4240-R1.0 had a incorrect vendor version and spec version */
> +	if ((reg == SDHCI_HOST_VERSION) &&
> +		((SVR_SOC_VER(svr) == SVR_T4240) && (SVR_REV(svr) == 0x10)))
> +		ret = (VENDOR_V_23 << SDHCI_VENDOR_VER_SHIFT) | SDHCI_SPEC_200;
> +

is this check correct if this is on v2.0 Si as well?

- k

> 	return ret;
> }
> 
> @@ -175,17 +179,12 @@ static void esdhc_reset(struct sdhci_host *host, u8 mask)
>  */
> static void esdhci_of_adma_workaround(struct sdhci_host *host, u32 intmask)
> {
> -	u32 tmp;
> 	bool applicable;
> 	dma_addr_t dmastart;
> 	dma_addr_t dmanow;
> 
> -	tmp = esdhc_readl(host, SDHCI_SLOT_INT_STATUS);
> -	tmp = (tmp & SDHCI_VENDOR_VER_MASK) >> SDHCI_VENDOR_VER_SHIFT;
> -
> 	applicable = (intmask & SDHCI_INT_DATA_END) &&
> -		(intmask & SDHCI_INT_BLK_GAP) &&
> -		(tmp == VENDOR_V_23);
> +		(intmask & SDHCI_INT_BLK_GAP) && (vvn == VENDOR_V_23);
> 	if (applicable) {
> 
> 		esdhc_reset(host, SDHCI_RESET_DATA);
> @@ -318,10 +317,9 @@ static void esdhc_of_resume(struct sdhci_host *host)
> 
> static void esdhc_of_platform_init(struct sdhci_host *host)
> {
> -	u32 vvn;
> +	svr = mfspr(SPRN_SVR);
> +	vvn = esdhc_readw(host, SDHCI_HOST_VERSION);
> 
> -	vvn = in_be32(host->ioaddr + SDHCI_SLOT_INT_STATUS);
> -	vvn = (vvn & SDHCI_VENDOR_VER_MASK) >> SDHCI_VENDOR_VER_SHIFT;
> 	if (vvn == VENDOR_V_22)
> 		host->quirks2 |= SDHCI_QUIRK2_HOST_NO_CMD23;
> 
> @@ -390,7 +388,6 @@ static int sdhci_esdhc_probe(struct platform_device *pdev)
> 	struct device_node *np;
> 	int ret;
> 
> -	svr = mfspr(SPRN_SVR);
> 	host = sdhci_pltfm_init(pdev, &sdhci_esdhc_pdata, 0);
> 	if (IS_ERR(host))
> 		return PTR_ERR(host);
> -- 
> 1.8.0
> 
> 
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