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| author | Siva Durga Prasad Paladugu <sivadur@xilinx.com> | 2018-04-19 12:37:08 +0530 |
|---|---|---|
| committer | Michal Simek <michal.simek@xilinx.com> | 2018-05-11 10:22:26 +0200 |
| commit | b8e25ef16a58bee2770e48a7158e267f386c84de (patch) | |
| tree | 286258779dd56aeecdecbaccab1fa135f28a38a5 | |
| parent | ca992e82e4e3428db0809303ebb9b696a77fa189 (diff) | |
| download | u-boot-b8e25ef16a58bee2770e48a7158e267f386c84de.zip u-boot-b8e25ef16a58bee2770e48a7158e267f386c84de.tar.gz u-boot-b8e25ef16a58bee2770e48a7158e267f386c84de.tar.bz2 | |
mmc: sdhci: Read capabilities register1 and update host caps
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 <sivadur@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
| -rw-r--r-- | drivers/mmc/sdhci.c | 28 | ||||
| -rw-r--r-- | include/sdhci.h | 6 |
2 files changed, 33 insertions, 1 deletions
diff --git a/drivers/mmc/sdhci.c b/drivers/mmc/sdhci.c index efc5a62..8971a11 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); @@ -638,6 +638,32 @@ int sdhci_setup_cfg(struct mmc_config *cfg, struct sdhci_host *host, cfg->host_caps &= ~MMC_MODE_HS_52MHz; } + 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 8ca632f..bef37df 100644 --- a/include/sdhci.h +++ b/include/sdhci.h @@ -166,6 +166,11 @@ #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 @@ -220,6 +225,7 @@ #define SDHCI_QUIRK_BROKEN_HISPD_MODE BIT(5) #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; |