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mmc: sdhci: Add support for dt caps & caps mask

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The sdhci capabilities registers can be incorrect. The
sdhci-caps-mask and sdhci-caps dt properties specify which bits of
the registers are incorrect and what their values should be. This
patch makes the sdhci driver use those properties to correct the caps.
Also use "dev_read_u64_default" instead of "dev_read_u32_array" for
caps mask.

Signed-off-by: T Karthik Reddy <t.karthik.reddy@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
This commit is contained in:
T Karthik Reddy 2019-09-02 16:34:31 +02:00 • committed by Peng Fan
parent 3f3d77158b
commit cd45d6f395
1 changed files with 13 additions and 8 deletions
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21
drivers/mmc/sdhci.c
View file

@ -711,17 +711,19 @@ int sdhci_setup_cfg(struct mmc_config *cfg, struct sdhci_host *host,
{
u32 caps, caps_1 = 0;
#if CONFIG_IS_ENABLED(DM_MMC)
u32 mask[2] = {0};
int ret;
ret = dev_read_u32_array(host->mmc->dev, "sdhci-caps-mask",
mask, 2);
if (ret && ret != -1)
return ret;
u64 dt_caps, dt_caps_mask;
caps = ~mask[1] & sdhci_readl(host, SDHCI_CAPABILITIES);
dt_caps_mask = dev_read_u64_default(host->mmc->dev,
"sdhci-caps-mask", 0);
dt_caps = dev_read_u64_default(host->mmc->dev,
"sdhci-caps", 0);
caps = ~(u32)dt_caps_mask &
sdhci_readl(host, SDHCI_CAPABILITIES);
caps |= (u32)dt_caps;
#else
caps = sdhci_readl(host, SDHCI_CAPABILITIES);
#endif
debug("%s, caps: 0x%x\n", __func__, caps);
#ifdef CONFIG_MMC_SDHCI_SDMA
if (!(caps & SDHCI_CAN_DO_SDMA)) {
@ -762,10 +764,13 @@ int sdhci_setup_cfg(struct mmc_config *cfg, struct sdhci_host *host,
/* Check whether the clock multiplier is supported or not */
if (SDHCI_GET_VERSION(host) >= SDHCI_SPEC_300) {
#if CONFIG_IS_ENABLED(DM_MMC)
caps_1 = ~mask[0] & sdhci_readl(host, SDHCI_CAPABILITIES_1);
caps_1 = ~(u32)(dt_caps_mask >> 32) &
sdhci_readl(host, SDHCI_CAPABILITIES_1);
caps_1 |= (u32)(dt_caps >> 32);
#else
caps_1 = sdhci_readl(host, SDHCI_CAPABILITIES_1);
#endif
debug("%s, caps_1: 0x%x\n", __func__, caps_1);
host->clk_mul = (caps_1 & SDHCI_CLOCK_MUL_MASK) >>
SDHCI_CLOCK_MUL_SHIFT;
}