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Ip=[149.199.60.100]; Helo=[xsj-pvapsmtpgw02] X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: BN6PR02MB3187 Cc: michal.simek@xilinx.com, Siva Durga Prasad Paladugu Subject: [U-Boot] [UBOOT PATCH v3 5/7] mmc : sdhci: Read capabilities register1 and update host caps X-BeenThere: u-boot@lists.denx.de X-Mailman-Version: 2.1.18 Precedence: list List-Id: U-Boot discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: u-boot-bounces@lists.denx.de Sender: "U-Boot" From: Siva Durga Prasad Paladugu This patch reads the capabilities register1 and update the host caps accordingly for mmc layer usage. This patch mainly reads for UHS capabilities inorder to support SD3.0. Signed-off-by: Siva Durga Prasad Paladugu --- drivers/mmc/sdhci.c | 28 +++++++++++++++++++++++++++- include/sdhci.h | 6 ++++++ 2 files changed, 33 insertions(+), 1 deletion(-) -- 2.7.4 This email and any attachments are intended for the sole use of the named recipient(s) and contain(s) confidential information that may be proprietary, privileged or copyrighted under applicable law. If you are not the intended recipient, do not read, copy, or forward this email message or any attachments. Delete this email message and any attachments immediately. diff --git a/drivers/mmc/sdhci.c b/drivers/mmc/sdhci.c index c17ab12..1cbd1bb 100644 --- a/drivers/mmc/sdhci.c +++ b/drivers/mmc/sdhci.c @@ -557,7 +557,7 @@ static const struct mmc_ops sdhci_ops = { int sdhci_setup_cfg(struct mmc_config *cfg, struct sdhci_host *host, u32 f_max, u32 f_min) { - u32 caps, caps_1; + u32 caps, caps_1 = 0; caps = sdhci_readl(host, SDHCI_CAPABILITIES); @@ -633,6 +633,32 @@ int sdhci_setup_cfg(struct mmc_config *cfg, struct sdhci_host *host, cfg->host_caps &= ~MMC_MODE_8BIT; } + if (SDHCI_GET_VERSION(host) >= SDHCI_SPEC_300) + caps_1 = sdhci_readl(host, SDHCI_CAPABILITIES_1); + + if (!(cfg->voltages & MMC_VDD_165_195) || + (host->quirks & SDHCI_QUIRK_NO_1_8_V)) + caps_1 &= ~(SDHCI_SUPPORT_SDR104 | SDHCI_SUPPORT_SDR50 | + SDHCI_SUPPORT_DDR50); + + if (caps_1 & (SDHCI_SUPPORT_SDR104 | SDHCI_SUPPORT_SDR50 | + SDHCI_SUPPORT_DDR50)) + cfg->host_caps |= MMC_CAP(UHS_SDR12) | MMC_CAP(UHS_SDR25); + + if (caps_1 & SDHCI_SUPPORT_SDR104) { + cfg->host_caps |= MMC_CAP(UHS_SDR104) | MMC_CAP(UHS_SDR50); + /* + * SD3.0: SDR104 is supported so (for eMMC) the caps2 + * field can be promoted to support HS200. + */ + cfg->host_caps |= MMC_CAP(MMC_HS_200); + } else if (caps_1 & SDHCI_SUPPORT_SDR50) { + cfg->host_caps |= MMC_CAP(UHS_SDR50); + } + + if (caps_1 & SDHCI_SUPPORT_DDR50) + cfg->host_caps |= MMC_CAP(UHS_DDR50); + if (host->host_caps) cfg->host_caps |= host->host_caps; diff --git a/include/sdhci.h b/include/sdhci.h index 9e8302e..72957dc 100644 --- a/include/sdhci.h +++ b/include/sdhci.h @@ -167,6 +167,11 @@ #define SDHCI_CAN_64BIT BIT(28) #define SDHCI_CAPABILITIES_1 0x44 +#define SDHCI_SUPPORT_SDR50 0x00000001 +#define SDHCI_SUPPORT_SDR104 0x00000002 +#define SDHCI_SUPPORT_DDR50 0x00000004 +#define SDHCI_USE_SDR50_TUNING 0x00002000 + #define SDHCI_CLOCK_MUL_MASK 0x00FF0000 #define SDHCI_CLOCK_MUL_SHIFT 16 @@ -215,6 +220,7 @@ #define SDHCI_QUIRK_BROKEN_VOLTAGE (1 << 4) #define SDHCI_QUIRK_WAIT_SEND_CMD (1 << 6) #define SDHCI_QUIRK_USE_WIDE8 (1 << 8) +#define SDHCI_QUIRK_NO_1_8_V (1 << 9) /* to make gcc happy */ struct sdhci_host;