This patch adds support for the RK3568 platform to this driver.
Signed-off-by: Yifeng Zhao <yifeng.z...@rock-chips.com>
---
Changes in v3:
- Config the interface clock by clk_set_rate directly
Changes in v2:
- Used sdhci_set_clock api to set clock.
- Used read_poll_timeout api to check dll status.
drivers/mmc/rockchip_sdhci.c | 109 +++++++++++++++++++++++++++++++++++
1 file changed, 109 insertions(+)
diff --git a/drivers/mmc/rockchip_sdhci.c b/drivers/mmc/rockchip_sdhci.c
index eff134c8f5..1ac00587d4 100644
--- a/drivers/mmc/rockchip_sdhci.c
+++ b/drivers/mmc/rockchip_sdhci.c
@@ -42,6 +42,34 @@
((((x) >> PHYCTRL_DLLRDY_SHIFT) & PHYCTRL_DLLRDY_MASK) ==\
PHYCTRL_DLLRDY_DONE)
+/* Rockchip specific Registers */
+#define DWCMSHC_EMMC_DLL_CTRL 0x800
+#define DWCMSHC_EMMC_DLL_CTRL_RESET BIT(1)
+#define DWCMSHC_EMMC_DLL_RXCLK 0x804
+#define DWCMSHC_EMMC_DLL_TXCLK 0x808
+#define DWCMSHC_EMMC_DLL_STRBIN 0x80c
+#define DWCMSHC_EMMC_DLL_STATUS0 0x840
+#define DWCMSHC_EMMC_DLL_STATUS1 0x844
+#define DWCMSHC_EMMC_DLL_START BIT(0)
+#define DWCMSHC_EMMC_DLL_RXCLK_SRCSEL 29
+#define DWCMSHC_EMMC_DLL_START_POINT 16
+#define DWCMSHC_EMMC_DLL_START_DEFAULT 5
+#define DWCMSHC_EMMC_DLL_INC_VALUE 2
+#define DWCMSHC_EMMC_DLL_INC 8
+#define DWCMSHC_EMMC_DLL_DLYENA BIT(27)
+#define DLL_TXCLK_TAPNUM_DEFAULT 0x10
+#define DLL_STRBIN_TAPNUM_DEFAULT 0x3
+#define DLL_TXCLK_TAPNUM_FROM_SW BIT(24)
+#define DWCMSHC_EMMC_DLL_LOCKED BIT(8)
+#define DWCMSHC_EMMC_DLL_TIMEOUT BIT(9)
+#define DLL_RXCLK_NO_INVERTER 1
+#define DLL_RXCLK_INVERTER 0
+#define DWCMSHC_ENHANCED_STROBE BIT(8)
+#define DLL_LOCK_WO_TMOUT(x) \
+ ((((x) & DWCMSHC_EMMC_DLL_LOCKED) == DWCMSHC_EMMC_DLL_LOCKED) && \
+ (((x) & DWCMSHC_EMMC_DLL_TIMEOUT) == 0))
+#define ROCKCHIP_MAX_CLKS 3
+
struct rockchip_sdhc_plat {
struct mmc_config cfg;
struct mmc mmc;
@@ -167,6 +195,77 @@ static int rk3399_sdhci_emmc_set_clock(struct sdhci_host
*host, unsigned int clo
return 0;
}
+static int rk3568_emmc_phy_init(struct udevice *dev)
+{
+ struct rockchip_sdhc *prv = dev_get_priv(dev);
+ struct sdhci_host *host = &prv->host;
+ u32 extra;
+
+ extra = DLL_RXCLK_NO_INVERTER << DWCMSHC_EMMC_DLL_RXCLK_SRCSEL;
+ sdhci_writel(host, extra, DWCMSHC_EMMC_DLL_RXCLK);
+
+ return 0;
+}
+
+static int rk3568_sdhci_emmc_set_clock(struct sdhci_host *host, unsigned int
clock)
+{
+ struct rockchip_sdhc *priv = container_of(host, struct rockchip_sdhc,
host);
+ int val, ret;
+ u32 extra;
+
+ if (clock > host->max_clk)
+ clock = host->max_clk;
+ if (clock)
+ clk_set_rate(&priv->emmc_clk, clock);
+
+ sdhci_set_clock(host->mmc, clock);
+
+ if (clock >= 100 * MHz) {
+ /* reset DLL */
+ sdhci_writel(host, DWCMSHC_EMMC_DLL_CTRL_RESET,
DWCMSHC_EMMC_DLL_CTRL);
+ udelay(1);
+ sdhci_writel(host, 0, DWCMSHC_EMMC_DLL_CTRL);
+
+ /* Init DLL settings */
+ extra = DWCMSHC_EMMC_DLL_START_DEFAULT <<
DWCMSHC_EMMC_DLL_START_POINT |
+ DWCMSHC_EMMC_DLL_INC_VALUE << DWCMSHC_EMMC_DLL_INC |
+ DWCMSHC_EMMC_DLL_START;
+ sdhci_writel(host, extra, DWCMSHC_EMMC_DLL_CTRL);
+
+ ret = read_poll_timeout(readl, host->ioaddr +
DWCMSHC_EMMC_DLL_STATUS0,
+ val, DLL_LOCK_WO_TMOUT(val), 1, 500);
+ if (ret)
+ return ret;
+
+ extra = DWCMSHC_EMMC_DLL_DLYENA |
+ DLL_RXCLK_NO_INVERTER << DWCMSHC_EMMC_DLL_RXCLK_SRCSEL;
+ sdhci_writel(host, extra, DWCMSHC_EMMC_DLL_RXCLK);
+
+ extra = DWCMSHC_EMMC_DLL_DLYENA |
+ DLL_TXCLK_TAPNUM_DEFAULT |
+ DLL_TXCLK_TAPNUM_FROM_SW;
+ sdhci_writel(host, extra, DWCMSHC_EMMC_DLL_TXCLK);
+
+ extra = DWCMSHC_EMMC_DLL_DLYENA |
+ DLL_STRBIN_TAPNUM_DEFAULT;
+ sdhci_writel(host, extra, DWCMSHC_EMMC_DLL_STRBIN);
+ } else {
+ /* reset the clock phase when the frequency is lower than
100MHz */
+ sdhci_writel(host, 0, DWCMSHC_EMMC_DLL_CTRL);
+ extra = DLL_RXCLK_NO_INVERTER << DWCMSHC_EMMC_DLL_RXCLK_SRCSEL;
+ sdhci_writel(host, extra, DWCMSHC_EMMC_DLL_RXCLK);
+ sdhci_writel(host, 0, DWCMSHC_EMMC_DLL_TXCLK);
+ sdhci_writel(host, 0, DWCMSHC_EMMC_DLL_STRBIN);
+ }
+
+ return 0;
+}
+
+static int rk3568_emmc_get_phy(struct udevice *dev)
+{
+ return 0;
+}
+
static int rockchip_sdhci_set_ios_post(struct sdhci_host *host)
{
struct rockchip_sdhc *priv = container_of(host, struct rockchip_sdhc,
host);
@@ -339,11 +438,21 @@ static const struct sdhci_data rk3399_data = {
.emmc_phy_init = rk3399_emmc_phy_init,
};
+static const struct sdhci_data rk3568_data = {
+ .emmc_set_clock = rk3568_sdhci_emmc_set_clock,
+ .get_phy = rk3568_emmc_get_phy,
+ .emmc_phy_init = rk3568_emmc_phy_init,
+};
+
static const struct udevice_id sdhci_ids[] = {
{
.compatible = "arasan,sdhci-5.1",
.data = (ulong)&rk3399_data,
},
+ {
+ .compatible = "rockchip,rk3568-dwcmshc",
+ .data = (ulong)&rk3568_data,
+ },
{ }
};
--
2.17.1
