Commit a63a57e5 authored by Yifeng Zhao's avatar Yifeng Zhao Committed by Kever Yang
Browse files

mmc: rockchip_sdhci: Add support for RK3568



This patch adds support for the RK3568 platform to this driver.
Signed-off-by: default avatarYifeng Zhao <yifeng.zhao@rock-chips.com>
Reviewed-by: Jaehoon Chung's avatarJaehoon Chung <jh80.chung@samsung.com>
Reviewed-by: Kever Yang's avatarKever Yang <kever.yang@rock-chips.com>
parent ac804143
......@@ -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,
},
{ }
};
......
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