mmc: sdhci: Add support for HOST_CONTROL2 and setting UHS timings
The HOST_CONTROL2 register is a part of SDHC v3.00 and not just specific
to arasan/zynq controllers. Add the same to sdhci.h.
Also create a common API to set UHS timings in HOST_CONTROL2.
Signed-off-by: Faiz Abbas <faiz_abbas@ti.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
diff --git a/drivers/mmc/sdhci.c b/drivers/mmc/sdhci.c
index 61cf216..0a0770c 100644
--- a/drivers/mmc/sdhci.c
+++ b/drivers/mmc/sdhci.c
@@ -534,6 +534,34 @@
sdhci_writeb(host, pwr, SDHCI_POWER_CONTROL);
}
+void sdhci_set_uhs_timing(struct sdhci_host *host)
+{
+ struct mmc *mmc = (struct mmc *)host->mmc;
+ u32 reg;
+
+ reg = sdhci_readw(host, SDHCI_HOST_CONTROL2);
+ reg &= ~SDHCI_CTRL_UHS_MASK;
+
+ switch (mmc->selected_mode) {
+ case UHS_SDR50:
+ case MMC_HS_52:
+ reg |= SDHCI_CTRL_UHS_SDR50;
+ break;
+ case UHS_DDR50:
+ case MMC_DDR_52:
+ reg |= SDHCI_CTRL_UHS_DDR50;
+ break;
+ case UHS_SDR104:
+ case MMC_HS_200:
+ reg |= SDHCI_CTRL_UHS_SDR104;
+ break;
+ default:
+ reg |= SDHCI_CTRL_UHS_SDR12;
+ }
+
+ sdhci_writew(host, reg, SDHCI_HOST_CONTROL2);
+}
+
#ifdef CONFIG_DM_MMC
static int sdhci_set_ios(struct udevice *dev)
{
diff --git a/drivers/mmc/zynq_sdhci.c b/drivers/mmc/zynq_sdhci.c
index 0802378..c525084 100644
--- a/drivers/mmc/zynq_sdhci.c
+++ b/drivers/mmc/zynq_sdhci.c
@@ -48,11 +48,6 @@
[MMC_HS_200] = MMC_HS200_BUS_SPEED,
};
-#define SDHCI_HOST_CTRL2 0x3E
-#define SDHCI_CTRL2_MODE_MASK 0x7
-#define SDHCI_18V_SIGNAL 0x8
-#define SDHCI_CTRL_EXEC_TUNING 0x0040
-#define SDHCI_CTRL_TUNED_CLK 0x80
#define SDHCI_TUNING_LOOP_COUNT 40
static void arasan_zynqmp_dll_reset(struct sdhci_host *host, u8 deviceid)
@@ -99,9 +94,9 @@
host = priv->host;
deviceid = priv->deviceid;
- ctrl = sdhci_readw(host, SDHCI_HOST_CTRL2);
+ ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2);
ctrl |= SDHCI_CTRL_EXEC_TUNING;
- sdhci_writew(host, ctrl, SDHCI_HOST_CTRL2);
+ sdhci_writew(host, ctrl, SDHCI_HOST_CONTROL2);
mdelay(1);
@@ -133,7 +128,7 @@
sdhci_writew(host, SDHCI_TRNS_READ, SDHCI_TRANSFER_MODE);
mmc_send_cmd(mmc, &cmd, NULL);
- ctrl = sdhci_readw(host, SDHCI_HOST_CTRL2);
+ ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2);
if (cmd.cmdidx == MMC_CMD_SEND_TUNING_BLOCK)
udelay(1);
@@ -142,7 +137,7 @@
if (tuning_loop_counter < 0) {
ctrl &= ~SDHCI_CTRL_TUNED_CLK;
- sdhci_writel(host, ctrl, SDHCI_HOST_CTRL2);
+ sdhci_writel(host, ctrl, SDHCI_HOST_CONTROL2);
}
if (!(ctrl & SDHCI_CTRL_TUNED_CLK)) {
@@ -184,36 +179,14 @@
return;
if (mmc->signal_voltage == MMC_SIGNAL_VOLTAGE_180) {
- reg = sdhci_readw(host, SDHCI_HOST_CTRL2);
- reg |= SDHCI_18V_SIGNAL;
- sdhci_writew(host, reg, SDHCI_HOST_CTRL2);
+ reg = sdhci_readw(host, SDHCI_HOST_CONTROL2);
+ reg |= SDHCI_CTRL_VDD_180;
+ sdhci_writew(host, reg, SDHCI_HOST_CONTROL2);
}
if (mmc->selected_mode > SD_HS &&
- mmc->selected_mode <= UHS_DDR50) {
- reg = sdhci_readw(host, SDHCI_HOST_CTRL2);
- reg &= ~SDHCI_CTRL2_MODE_MASK;
- switch (mmc->selected_mode) {
- case UHS_SDR12:
- reg |= UHS_SDR12_BUS_SPEED;
- break;
- case UHS_SDR25:
- reg |= UHS_SDR25_BUS_SPEED;
- break;
- case UHS_SDR50:
- reg |= UHS_SDR50_BUS_SPEED;
- break;
- case UHS_SDR104:
- reg |= UHS_SDR104_BUS_SPEED;
- break;
- case UHS_DDR50:
- reg |= UHS_DDR50_BUS_SPEED;
- break;
- default:
- break;
- }
- sdhci_writew(host, reg, SDHCI_HOST_CTRL2);
- }
+ mmc->selected_mode <= UHS_DDR50)
+ sdhci_set_uhs_timing(host);
}
#endif