diff options
| author | Siva Durga Prasad Paladugu <[email protected]> | 2018-04-19 12:37:08 +0530 |
|---|---|---|
| committer | Michal Simek <[email protected]> | 2018-05-11 10:22:26 +0200 |
| commit | b8e25ef16a58bee2770e48a7158e267f386c84de (patch) | |
| tree | 286258779dd56aeecdecbaccab1fa135f28a38a5 /drivers | |
| parent | ca992e82e4e3428db0809303ebb9b696a77fa189 (diff) | |
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 <[email protected]>
Signed-off-by: Michal Simek <[email protected]>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/mmc/sdhci.c | 28 |
1 files changed, 27 insertions, 1 deletions
diff --git a/drivers/mmc/sdhci.c b/drivers/mmc/sdhci.c index efc5a62e619..8971a1122c9 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; |