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Ip=[192.88.168.50]; Helo=[tx30smr01.am.freescale.net] X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY4PR03MB2886 Sender: linux-clk-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-clk@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The eSDHC of T4240-R1.0-R2.0 has incorrect vender version and spec version. Acturally the right version numbers should be VVN=0x13 and SVN = 0x1. This patch adds the GUTS driver support for eSDHC driver to match SoC. And fix host version to avoid that incorrect version numbers break down the ADMA data transfer. Signed-off-by: Yangbo Lu Acked-by: Ulf Hansson Acked-by: Scott Wood Acked-by: Arnd Bergmann --- Changes for v2: - Got SVR through iomap instead of dts Changes for v3: - Managed GUTS through syscon instead of iomap in eSDHC driver Changes for v4: - Got SVR by GUTS driver instead of SYSCON Changes for v5: - Changed to get SVR through API fsl_guts_get_svr() - Combined patch 4, patch 5 and patch 6 into one Changes for v6: - Added 'Acked-by: Ulf Hansson' Changes for v7: - None Changes for v8: - Added 'Acked-by: Scott Wood' Changes for v9: - None Changes for v10: - None Changes for v11: - Changed to use soc_device_match Changes for v12: - Matched soc through .family field instead of .soc_id Changes for v13: - None Changes for v14: - None Changes for v15: - None Changes for v16: - Added 'Acked-by: Arnd' --- drivers/mmc/host/Kconfig | 1 + drivers/mmc/host/sdhci-of-esdhc.c | 20 ++++++++++++++++++++ 2 files changed, 21 insertions(+) diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig index 5cf7eba..4128a3c 100644 --- a/drivers/mmc/host/Kconfig +++ b/drivers/mmc/host/Kconfig @@ -144,6 +144,7 @@ config MMC_SDHCI_OF_ESDHC depends on MMC_SDHCI_PLTFM depends on PPC || ARCH_MXC || ARCH_LAYERSCAPE select MMC_SDHCI_IO_ACCESSORS + select FSL_GUTS help This selects the Freescale eSDHC controller support. diff --git a/drivers/mmc/host/sdhci-of-esdhc.c b/drivers/mmc/host/sdhci-of-esdhc.c index fb71c86..57bdb9e 100644 --- a/drivers/mmc/host/sdhci-of-esdhc.c +++ b/drivers/mmc/host/sdhci-of-esdhc.c @@ -18,6 +18,7 @@ #include #include #include +#include #include #include "sdhci-pltfm.h" #include "sdhci-esdhc.h" @@ -28,6 +29,7 @@ struct sdhci_esdhc { u8 vendor_ver; u8 spec_ver; + bool quirk_incorrect_hostver; }; /** @@ -73,6 +75,8 @@ static u32 esdhc_readl_fixup(struct sdhci_host *host, static u16 esdhc_readw_fixup(struct sdhci_host *host, int spec_reg, u32 value) { + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); + struct sdhci_esdhc *esdhc = sdhci_pltfm_priv(pltfm_host); u16 ret; int shift = (spec_reg & 0x2) * 8; @@ -80,6 +84,12 @@ static u16 esdhc_readw_fixup(struct sdhci_host *host, ret = value & 0xffff; else ret = (value >> shift) & 0xffff; + /* Workaround for T4240-R1.0-R2.0 eSDHC which has incorrect + * vendor version and spec version information. + */ + if ((spec_reg == SDHCI_HOST_VERSION) && + (esdhc->quirk_incorrect_hostver)) + ret = (VENDOR_V_23 << SDHCI_VENDOR_VER_SHIFT) | SDHCI_SPEC_200; return ret; } @@ -558,6 +568,12 @@ static const struct sdhci_pltfm_data sdhci_esdhc_le_pdata = { .ops = &sdhci_esdhc_le_ops, }; +static struct soc_device_attribute soc_incorrect_hostver[] = { + { .family = "QorIQ T4240", .revision = "1.0", }, + { .family = "QorIQ T4240", .revision = "2.0", }, + { }, +}; + static void esdhc_init(struct platform_device *pdev, struct sdhci_host *host) { struct sdhci_pltfm_host *pltfm_host; @@ -571,6 +587,10 @@ static void esdhc_init(struct platform_device *pdev, struct sdhci_host *host) esdhc->vendor_ver = (host_ver & SDHCI_VENDOR_VER_MASK) >> SDHCI_VENDOR_VER_SHIFT; esdhc->spec_ver = host_ver & SDHCI_SPEC_VER_MASK; + if (soc_device_match(soc_incorrect_hostver)) + esdhc->quirk_incorrect_hostver = true; + else + esdhc->quirk_incorrect_hostver = false; } static int sdhci_esdhc_probe(struct platform_device *pdev)