Commit a1b0b977 authored by Weijun Yang's avatar Weijun Yang Committed by Ulf Hansson
Browse files

mmc: sdhci-sirf: fake version and capbility registers 



chips have some issues for version and capbility registers, here we fake
them.

Signed-off-by: default avatarWeijun Yang <Weijun.Yang@csr.com>
Signed-off-by: default avatarBarry Song <Baohua.Song@csr.com>
Signed-off-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
parent d1ba44a4

drivers/mmc/host/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -219,6 +219,7 @@ config MMC_SDHCI_SIRF 
	tristate "SDHCI support on CSR SiRFprimaII and SiRFmarco SoCs"

	depends on ARCH_SIRF

	depends on MMC_SDHCI_PLTFM

	select MMC_SDHCI_IO_ACCESSORS

	help

	  This selects the SDHCI support for SiRF System-on-Chip devices.

drivers/mmc/host/sdhci-sirf.c

+35 −0
Original line number Diff line number Diff line
@@ -43,6 +43,39 @@ static void sdhci_sirf_set_bus_width(struct sdhci_host *host, int width) 
	sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL);

}



static u32 sdhci_sirf_readl_le(struct sdhci_host *host, int reg)

{

	u32 val = readl(host->ioaddr + reg);



	if (unlikely((reg == SDHCI_CAPABILITIES_1) &&

			(host->mmc->caps & MMC_CAP_UHS_SDR50))) {

		/* fake CAP_1 register */

		val = SDHCI_SUPPORT_SDR50 | SDHCI_USE_SDR50_TUNING;

	}



	if (unlikely(reg == SDHCI_SLOT_INT_STATUS)) {

		u32 prss = val;

		/* fake chips as V3.0 host conreoller */

		prss &= ~(0xFF << 16);

		val = prss | (SDHCI_SPEC_300 << 16);

	}

	return val;

}



static u16 sdhci_sirf_readw_le(struct sdhci_host *host, int reg)

{

	u16 ret = 0;



	ret = readw(host->ioaddr + reg);



	if (unlikely(reg == SDHCI_HOST_VERSION)) {

		ret = readw(host->ioaddr + SDHCI_HOST_VERSION);

		ret |= SDHCI_SPEC_300;

	}



	return ret;

}



static int sdhci_sirf_execute_tuning(struct sdhci_host *host, u32 opcode)

{

	int tuning_seq_cnt = 3;
@@ -113,6 +146,8 @@ static int sdhci_sirf_execute_tuning(struct sdhci_host *host, u32 opcode) 
}



static struct sdhci_ops sdhci_sirf_ops = {

	.read_l = sdhci_sirf_readl_le,

	.read_w = sdhci_sirf_readw_le,

	.platform_execute_tuning = sdhci_sirf_execute_tuning,

	.set_clock = sdhci_set_clock,

	.get_max_clock	= sdhci_pltfm_clk_get_max_clock,