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path: root/drivers/mmc/host/sdhci-of-dwcmshc.c
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Diffstat (limited to 'drivers/mmc/host/sdhci-of-dwcmshc.c')
-rw-r--r--drivers/mmc/host/sdhci-of-dwcmshc.c635
1 files changed, 607 insertions, 28 deletions
diff --git a/drivers/mmc/host/sdhci-of-dwcmshc.c b/drivers/mmc/host/sdhci-of-dwcmshc.c
index eebd45389956..51949cde0958 100644
--- a/drivers/mmc/host/sdhci-of-dwcmshc.c
+++ b/drivers/mmc/host/sdhci-of-dwcmshc.c
@@ -11,6 +11,7 @@
#include <linux/arm-smccc.h>
#include <linux/bitfield.h>
#include <linux/clk.h>
+#include <linux/clk-provider.h>
#include <linux/dma-mapping.h>
#include <linux/iopoll.h>
#include <linux/kernel.h>
@@ -19,11 +20,15 @@
#include <linux/platform_device.h>
#include <linux/pm_domain.h>
#include <linux/pm_runtime.h>
+#include <linux/regmap.h>
#include <linux/reset.h>
#include <linux/sizes.h>
+#include <linux/mfd/syscon.h>
+#include <linux/units.h>
#include "sdhci-pltfm.h"
#include "cqhci.h"
+#include "sdhci-cqhci.h"
#define SDHCI_DWCMSHC_ARG2_STUFF GENMASK(31, 16)
@@ -39,6 +44,7 @@
#define DWCMSHC_CARD_IS_EMMC BIT(0)
#define DWCMSHC_ENHANCED_STROBE BIT(8)
#define DWCMSHC_EMMC_ATCTRL 0x40
+#define DWCMSHC_AT_STAT 0x44
/* Tuning and auto-tuning fields in AT_CTRL_R control register */
#define AT_CTRL_AT_EN BIT(0) /* autotuning is enabled */
#define AT_CTRL_CI_SEL BIT(1) /* interval to drive center phase select */
@@ -82,6 +88,8 @@
#define DWCMSHC_EMMC_DLL_TXCLK 0x808
#define DWCMSHC_EMMC_DLL_STRBIN 0x80c
#define DECMSHC_EMMC_DLL_CMDOUT 0x810
+#define DECMSHC_EMMC_MISC_CON 0x81C
+#define MISC_INTCLK_EN BIT(1)
#define DWCMSHC_EMMC_DLL_STATUS0 0x840
#define DWCMSHC_EMMC_DLL_START BIT(0)
#define DWCMSHC_EMMC_DLL_LOCKED BIT(8)
@@ -94,7 +102,7 @@
#define DLL_TXCLK_TAPNUM_DEFAULT 0x10
#define DLL_TXCLK_TAPNUM_90_DEGREES 0xA
#define DLL_TXCLK_TAPNUM_FROM_SW BIT(24)
-#define DLL_STRBIN_TAPNUM_DEFAULT 0x8
+#define DLL_STRBIN_TAPNUM_DEFAULT 0x4
#define DLL_STRBIN_TAPNUM_FROM_SW BIT(24)
#define DLL_STRBIN_DELAY_NUM_SEL BIT(26)
#define DLL_STRBIN_DELAY_NUM_OFFSET 16
@@ -194,6 +202,19 @@
#define PHY_DLLDL_CNFG_SLV_INPSEL_MASK GENMASK(6, 5) /* bits [6:5] */
#define PHY_DLLDL_CNFG_SLV_INPSEL 0x3 /* clock source select for slave DL */
+/* PHY DLL offset setting register */
+#define PHY_DLL_OFFST_R (DWC_MSHC_PTR_PHY_R + 0x29)
+/* DLL LBT setting register */
+#define PHY_DLLBT_CNFG_R (DWC_MSHC_PTR_PHY_R + 0x2c)
+/* DLL Status register */
+#define PHY_DLL_STATUS_R (DWC_MSHC_PTR_PHY_R + 0x2e)
+#define DLL_LOCK_STS BIT(0)/* DLL is locked and ready */
+/*
+ * Captures the value of DLL's lock error status information. Value is valid
+ * only when LOCK_STS is set.
+ */
+#define DLL_ERROR_STS BIT(1)
+
#define FLAG_IO_FIXED_1V8 BIT(0)
#define BOUNDARY_OK(addr, len) \
@@ -206,6 +227,31 @@
/* SMC call for BlueField-3 eMMC RST_N */
#define BLUEFIELD_SMC_SET_EMMC_RST_N 0x82000007
+/* Eswin specific Registers */
+#define EIC7700_CARD_CLK_STABLE BIT(28)
+#define EIC7700_INT_BCLK_STABLE BIT(16)
+#define EIC7700_INT_ACLK_STABLE BIT(8)
+#define EIC7700_INT_TMCLK_STABLE BIT(0)
+#define EIC7700_INT_CLK_STABLE (EIC7700_CARD_CLK_STABLE | \
+ EIC7700_INT_ACLK_STABLE | \
+ EIC7700_INT_BCLK_STABLE | \
+ EIC7700_INT_TMCLK_STABLE)
+#define EIC7700_HOST_VAL_STABLE BIT(0)
+
+/* strength definition */
+#define PHYCTRL_DR_33OHM 0xee
+#define PHYCTRL_DR_40OHM 0xcc
+#define PHYCTRL_DR_50OHM 0x88
+#define PHYCTRL_DR_66OHM 0x44
+#define PHYCTRL_DR_100OHM 0x00
+
+#define MAX_PHASE_CODE 0xff
+#define TUNING_RANGE_THRESHOLD 40
+#define PHY_CLK_MAX_DELAY_MASK 0x7f
+#define PHY_DELAY_CODE_MAX 0x7f
+#define PHY_DELAY_CODE_EMMC 0x17
+#define PHY_DELAY_CODE_SD 0x55
+
enum dwcmshc_rk_type {
DWCMSHC_RK3568,
DWCMSHC_RK3588,
@@ -217,6 +263,11 @@ struct rk35xx_priv {
u8 txclk_tapnum;
};
+struct eic7700_priv {
+ struct reset_control *reset;
+ unsigned int drive_impedance;
+};
+
#define DWCMSHC_MAX_OTHER_CLKS 3
struct dwcmshc_priv {
@@ -234,10 +285,22 @@ struct dwcmshc_priv {
struct dwcmshc_pltfm_data {
const struct sdhci_pltfm_data pdata;
+ const struct cqhci_host_ops *cqhci_host_ops;
int (*init)(struct device *dev, struct sdhci_host *host, struct dwcmshc_priv *dwc_priv);
void (*postinit)(struct sdhci_host *host, struct dwcmshc_priv *dwc_priv);
};
+static void dwcmshc_enable_card_clk(struct sdhci_host *host)
+{
+ u16 ctrl;
+
+ ctrl = sdhci_readw(host, SDHCI_CLOCK_CONTROL);
+ if ((ctrl & SDHCI_CLOCK_INT_EN) && !(ctrl & SDHCI_CLOCK_CARD_EN)) {
+ ctrl |= SDHCI_CLOCK_CARD_EN;
+ sdhci_writew(host, ctrl, SDHCI_CLOCK_CONTROL);
+ }
+}
+
static int dwcmshc_get_enable_other_clks(struct device *dev,
struct dwcmshc_priv *priv,
int num_clks,
@@ -289,6 +352,19 @@ static void dwcmshc_adma_write_desc(struct sdhci_host *host, void **desc,
sdhci_adma_write_desc(host, desc, addr, len, cmd);
}
+static void dwcmshc_reset(struct sdhci_host *host, u8 mask)
+{
+ sdhci_reset(host, mask);
+
+ /* The dwcmshc does not comply with the SDHCI specification
+ * regarding the "Software Reset for CMD line should clear 'Command
+ * Complete' in the Normal Interrupt Status Register." Clear the bit
+ * here to compensate for this quirk.
+ */
+ if (mask & SDHCI_RESET_CMD)
+ sdhci_writel(host, SDHCI_INT_RESPONSE, SDHCI_INT_STATUS);
+}
+
static unsigned int dwcmshc_get_max_clock(struct sdhci_host *host)
{
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
@@ -561,6 +637,73 @@ static void dwcmshc_cqhci_dumpregs(struct mmc_host *mmc)
sdhci_dumpregs(mmc_priv(mmc));
}
+static void rk35xx_sdhci_cqe_pre_enable(struct mmc_host *mmc)
+{
+ struct sdhci_host *host = mmc_priv(mmc);
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ struct dwcmshc_priv *dwc_priv = sdhci_pltfm_priv(pltfm_host);
+ u32 reg;
+
+ /* Set Send Status Command Idle Timer to 10.66us (256 * 1 / 24) */
+ reg = sdhci_readl(host, dwc_priv->vendor_specific_area2 + CQHCI_SSC1);
+ reg = (reg & ~CQHCI_SSC1_CIT_MASK) | 0x0100;
+ sdhci_writel(host, reg, dwc_priv->vendor_specific_area2 + CQHCI_SSC1);
+
+ reg = sdhci_readl(host, dwc_priv->vendor_specific_area2 + CQHCI_CFG);
+ reg |= CQHCI_ENABLE;
+ sdhci_writel(host, reg, dwc_priv->vendor_specific_area2 + CQHCI_CFG);
+}
+
+static void rk35xx_sdhci_cqe_enable(struct mmc_host *mmc)
+{
+ struct sdhci_host *host = mmc_priv(mmc);
+ u32 reg;
+
+ reg = sdhci_readl(host, SDHCI_PRESENT_STATE);
+ while (reg & SDHCI_DATA_AVAILABLE) {
+ sdhci_readl(host, SDHCI_BUFFER);
+ reg = sdhci_readl(host, SDHCI_PRESENT_STATE);
+ }
+
+ sdhci_writew(host, DWCMSHC_SDHCI_CQE_TRNS_MODE, SDHCI_TRANSFER_MODE);
+
+ sdhci_cqe_enable(mmc);
+}
+
+static void rk35xx_sdhci_cqe_disable(struct mmc_host *mmc, bool recovery)
+{
+ struct sdhci_host *host = mmc_priv(mmc);
+ unsigned long flags;
+ u32 ctrl;
+
+ /*
+ * During CQE command transfers, command complete bit gets latched.
+ * So s/w should clear command complete interrupt status when CQE is
+ * either halted or disabled. Otherwise unexpected SDCHI legacy
+ * interrupt gets triggered when CQE is halted/disabled.
+ */
+ spin_lock_irqsave(&host->lock, flags);
+ ctrl = sdhci_readl(host, SDHCI_INT_ENABLE);
+ ctrl |= SDHCI_INT_RESPONSE;
+ sdhci_writel(host, ctrl, SDHCI_INT_ENABLE);
+ sdhci_writel(host, SDHCI_INT_RESPONSE, SDHCI_INT_STATUS);
+ spin_unlock_irqrestore(&host->lock, flags);
+
+ sdhci_cqe_disable(mmc, recovery);
+}
+
+static void rk35xx_sdhci_cqe_post_disable(struct mmc_host *mmc)
+{
+ struct sdhci_host *host = mmc_priv(mmc);
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ struct dwcmshc_priv *dwc_priv = sdhci_pltfm_priv(pltfm_host);
+ u32 ctrl;
+
+ ctrl = sdhci_readl(host, dwc_priv->vendor_specific_area2 + CQHCI_CFG);
+ ctrl &= ~CQHCI_ENABLE;
+ sdhci_writel(host, ctrl, dwc_priv->vendor_specific_area2 + CQHCI_CFG);
+}
+
static void dwcmshc_rk3568_set_clock(struct sdhci_host *host, unsigned int clock)
{
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
@@ -588,10 +731,11 @@ static void dwcmshc_rk3568_set_clock(struct sdhci_host *host, unsigned int clock
sdhci_set_clock(host, clock);
- /* Disable cmd conflict check */
+ /* Disable cmd conflict check and internal clock gate */
reg = dwc_priv->vendor_specific_area1 + DWCMSHC_HOST_CTRL3;
extra = sdhci_readl(host, reg);
extra &= ~BIT(0);
+ extra |= BIT(4);
sdhci_writel(host, extra, reg);
if (clock <= 52000000) {
@@ -679,6 +823,10 @@ static void rk35xx_sdhci_reset(struct sdhci_host *host, u8 mask)
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
struct dwcmshc_priv *dwc_priv = sdhci_pltfm_priv(pltfm_host);
struct rk35xx_priv *priv = dwc_priv->priv;
+ u32 extra = sdhci_readl(host, DECMSHC_EMMC_MISC_CON);
+
+ if ((host->mmc->caps2 & MMC_CAP2_CQE) && (mask & SDHCI_RESET_ALL))
+ cqhci_deactivate(host->mmc);
if (mask & SDHCI_RESET_ALL && priv->reset) {
reset_control_assert(priv->reset);
@@ -687,6 +835,9 @@ static void rk35xx_sdhci_reset(struct sdhci_host *host, u8 mask)
}
sdhci_reset(host, mask);
+
+ /* Enable INTERNAL CLOCK */
+ sdhci_writel(host, MISC_INTCLK_EN | extra, DECMSHC_EMMC_MISC_CON);
}
static int dwcmshc_rk35xx_init(struct device *dev, struct sdhci_host *host,
@@ -832,15 +983,7 @@ static void th1520_sdhci_reset(struct sdhci_host *host, u8 mask)
struct dwcmshc_priv *priv = sdhci_pltfm_priv(pltfm_host);
u16 ctrl_2;
- sdhci_reset(host, mask);
-
- /* The T-Head 1520 SoC does not comply with the SDHCI specification
- * regarding the "Software Reset for CMD line should clear 'Command
- * Complete' in the Normal Interrupt Status Register." Clear the bit
- * here to compensate for this quirk.
- */
- if (mask & SDHCI_RESET_CMD)
- sdhci_writel(host, SDHCI_INT_RESPONSE, SDHCI_INT_STATUS);
+ dwcmshc_reset(host, mask);
if (priv->flags & FLAG_IO_FIXED_1V8) {
ctrl_2 = sdhci_readw(host, SDHCI_HOST_CONTROL2);
@@ -886,7 +1029,7 @@ static void cv18xx_sdhci_reset(struct sdhci_host *host, u8 mask)
struct dwcmshc_priv *priv = sdhci_pltfm_priv(pltfm_host);
u32 val, emmc_caps = MMC_CAP2_NO_SD | MMC_CAP2_NO_SDIO;
- sdhci_reset(host, mask);
+ dwcmshc_reset(host, mask);
if ((host->mmc->caps2 & emmc_caps) == emmc_caps) {
val = sdhci_readl(host, priv->vendor_specific_area1 + CV18XX_SDHCI_MSHC_CTRL);
@@ -958,7 +1101,7 @@ static void cv18xx_sdhci_post_tuning(struct sdhci_host *host)
val |= SDHCI_INT_DATA_AVAIL;
sdhci_writel(host, val, SDHCI_INT_STATUS);
- sdhci_reset(host, SDHCI_RESET_CMD | SDHCI_RESET_DATA);
+ dwcmshc_reset(host, SDHCI_RESET_CMD | SDHCI_RESET_DATA);
}
static int cv18xx_sdhci_execute_tuning(struct sdhci_host *host, u32 opcode)
@@ -1095,12 +1238,417 @@ static int sg2042_init(struct device *dev, struct sdhci_host *host,
ARRAY_SIZE(clk_ids), clk_ids);
}
+static void sdhci_eic7700_set_clock(struct sdhci_host *host, unsigned int clock)
+{
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ u16 clk;
+
+ host->mmc->actual_clock = clock;
+
+ if (clock == 0) {
+ sdhci_set_clock(host, clock);
+ return;
+ }
+
+ clk_set_rate(pltfm_host->clk, clock);
+
+ clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL);
+ clk |= SDHCI_CLOCK_INT_EN;
+ sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL);
+
+ dwcmshc_enable_card_clk(host);
+}
+
+static void sdhci_eic7700_config_phy_delay(struct sdhci_host *host, int delay)
+{
+ delay &= PHY_CLK_MAX_DELAY_MASK;
+
+ /* phy clk delay line config */
+ sdhci_writeb(host, PHY_SDCLKDL_CNFG_UPDATE, PHY_SDCLKDL_CNFG_R);
+ sdhci_writeb(host, delay, PHY_SDCLKDL_DC_R);
+ sdhci_writeb(host, 0x0, PHY_SDCLKDL_CNFG_R);
+}
+
+static void sdhci_eic7700_config_phy(struct sdhci_host *host)
+{
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ struct dwcmshc_priv *dwc_priv = sdhci_pltfm_priv(pltfm_host);
+ u32 emmc_caps = MMC_CAP2_NO_SD | MMC_CAP2_NO_SDIO;
+ struct eic7700_priv *priv = dwc_priv->priv;
+ unsigned int val, drv;
+
+ drv = FIELD_PREP(PHY_CNFG_PAD_SP_MASK, priv->drive_impedance & 0xF);
+ drv |= FIELD_PREP(PHY_CNFG_PAD_SN_MASK, (priv->drive_impedance >> 4) & 0xF);
+
+ if ((host->mmc->caps2 & emmc_caps) == emmc_caps) {
+ val = sdhci_readw(host, dwc_priv->vendor_specific_area1 + DWCMSHC_EMMC_CONTROL);
+ val |= DWCMSHC_CARD_IS_EMMC;
+ sdhci_writew(host, val, dwc_priv->vendor_specific_area1 + DWCMSHC_EMMC_CONTROL);
+ }
+
+ /* reset phy, config phy's pad */
+ sdhci_writel(host, drv | ~PHY_CNFG_RSTN_DEASSERT, PHY_CNFG_R);
+
+ /* configure phy pads */
+ val = FIELD_PREP(PHY_PAD_TXSLEW_CTRL_P_MASK, PHY_PAD_TXSLEW_CTRL_N_SG2042);
+ val |= FIELD_PREP(PHY_PAD_TXSLEW_CTRL_N_MASK, PHY_PAD_TXSLEW_CTRL_N_SG2042);
+ val |= FIELD_PREP(PHY_PAD_WEAKPULL_MASK, PHY_PAD_WEAKPULL_PULLUP);
+ val |= PHY_PAD_RXSEL_1V8;
+ sdhci_writew(host, val, PHY_CMDPAD_CNFG_R);
+ sdhci_writew(host, val, PHY_DATAPAD_CNFG_R);
+ sdhci_writew(host, val, PHY_RSTNPAD_CNFG_R);
+
+ /* Clock PAD Setting */
+ val = FIELD_PREP(PHY_PAD_TXSLEW_CTRL_P_MASK, PHY_PAD_TXSLEW_CTRL_N_SG2042);
+ val |= FIELD_PREP(PHY_PAD_TXSLEW_CTRL_N_MASK, PHY_PAD_TXSLEW_CTRL_N_SG2042);
+ sdhci_writew(host, val, PHY_CLKPAD_CNFG_R);
+
+ /* PHY strobe PAD setting (EMMC only) */
+ if ((host->mmc->caps2 & emmc_caps) == emmc_caps) {
+ val = FIELD_PREP(PHY_PAD_TXSLEW_CTRL_P_MASK, PHY_PAD_TXSLEW_CTRL_N_SG2042);
+ val |= FIELD_PREP(PHY_PAD_TXSLEW_CTRL_N_MASK, PHY_PAD_TXSLEW_CTRL_N_SG2042);
+ val |= PHY_PAD_RXSEL_1V8;
+ sdhci_writew(host, val, PHY_STBPAD_CNFG_R);
+ }
+ usleep_range(2000, 3000);
+ sdhci_writel(host, drv | PHY_CNFG_RSTN_DEASSERT, PHY_CNFG_R);
+ sdhci_eic7700_config_phy_delay(host, dwc_priv->delay_line);
+}
+
+static void sdhci_eic7700_reset(struct sdhci_host *host, u8 mask)
+{
+ sdhci_reset(host, mask);
+
+ /* after reset all, the phy's config will be clear */
+ if (mask == SDHCI_RESET_ALL)
+ sdhci_eic7700_config_phy(host);
+}
+
+static int sdhci_eic7700_reset_init(struct device *dev, struct eic7700_priv *priv)
+{
+ int ret;
+
+ priv->reset = devm_reset_control_array_get_optional_exclusive(dev);
+ if (IS_ERR(priv->reset)) {
+ ret = PTR_ERR(priv->reset);
+ dev_err(dev, "failed to get reset control %d\n", ret);
+ return ret;
+ }
+
+ ret = reset_control_assert(priv->reset);
+ if (ret) {
+ dev_err(dev, "Failed to assert reset signals: %d\n", ret);
+ return ret;
+ }
+ usleep_range(2000, 2100);
+ ret = reset_control_deassert(priv->reset);
+ if (ret) {
+ dev_err(dev, "Failed to deassert reset signals: %d\n", ret);
+ return ret;
+ }
+
+ return ret;
+}
+
+static unsigned int eic7700_convert_drive_impedance_ohm(struct device *dev, unsigned int dr_ohm)
+{
+ switch (dr_ohm) {
+ case 100:
+ return PHYCTRL_DR_100OHM;
+ case 66:
+ return PHYCTRL_DR_66OHM;
+ case 50:
+ return PHYCTRL_DR_50OHM;
+ case 40:
+ return PHYCTRL_DR_40OHM;
+ case 33:
+ return PHYCTRL_DR_33OHM;
+ }
+
+ dev_warn(dev, "Invalid value %u for drive-impedance-ohms.\n", dr_ohm);
+ return PHYCTRL_DR_50OHM;
+}
+
+static int sdhci_eic7700_delay_tuning(struct sdhci_host *host, u32 opcode)
+{
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ struct dwcmshc_priv *dwc_priv = sdhci_pltfm_priv(pltfm_host);
+ int delay_min = -1;
+ int delay_max = -1;
+ int cmd_error = 0;
+ int delay = 0;
+ int i = 0;
+ int ret;
+
+ for (i = 0; i <= PHY_DELAY_CODE_MAX; i++) {
+ sdhci_eic7700_config_phy_delay(host, i);
+ ret = mmc_send_tuning(host->mmc, opcode, &cmd_error);
+ if (ret) {
+ host->ops->reset(host, SDHCI_RESET_CMD | SDHCI_RESET_DATA);
+ usleep_range(200, 210);
+ if (delay_min != -1 && delay_max != -1)
+ break;
+ } else {
+ if (delay_min == -1) {
+ delay_min = i;
+ continue;
+ } else {
+ delay_max = i;
+ continue;
+ }
+ }
+ }
+ if (delay_min == -1 && delay_max == -1) {
+ pr_err("%s: delay code tuning failed!\n", mmc_hostname(host->mmc));
+ sdhci_eic7700_config_phy_delay(host, dwc_priv->delay_line);
+ return ret;
+ }
+
+ delay = (delay_min + delay_max) / 2;
+ sdhci_eic7700_config_phy_delay(host, delay);
+
+ return 0;
+}
+
+static int sdhci_eic7700_phase_code_tuning(struct sdhci_host *host, u32 opcode)
+{
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ struct dwcmshc_priv *priv = sdhci_pltfm_priv(pltfm_host);
+ u32 sd_caps = MMC_CAP2_NO_MMC | MMC_CAP2_NO_SDIO;
+ int phase_code = -1;
+ int code_range = -1;
+ bool is_sd = false;
+ int code_min = -1;
+ int code_max = -1;
+ int cmd_error = 0;
+ int ret = 0;
+ int i = 0;
+
+ if ((host->mmc->caps2 & sd_caps) == sd_caps)
+ is_sd = true;
+
+ for (i = 0; i <= MAX_PHASE_CODE; i++) {
+ /* Centered Phase code */
+ sdhci_writew(host, i, priv->vendor_specific_area1 + DWCMSHC_AT_STAT);
+ ret = mmc_send_tuning(host->mmc, opcode, &cmd_error);
+ host->ops->reset(host, SDHCI_RESET_CMD | SDHCI_RESET_DATA);
+
+ if (ret) {
+ /* SD specific range tracking */
+ if (is_sd && code_min != -1 && code_max != -1) {
+ if (code_max - code_min > code_range) {
+ code_range = code_max - code_min;
+ phase_code = (code_min + code_max) / 2;
+ if (code_range > TUNING_RANGE_THRESHOLD)
+ break;
+ }
+ code_min = -1;
+ code_max = -1;
+ }
+ /* EMMC breaks after first valid range */
+ if (!is_sd && code_min != -1 && code_max != -1)
+ break;
+ } else {
+ /* Track valid phase code range */
+ if (code_min == -1) {
+ code_min = i;
+ if (!is_sd)
+ continue;
+ }
+ code_max = i;
+ if (is_sd && i == MAX_PHASE_CODE) {
+ if (code_max - code_min > code_range) {
+ code_range = code_max - code_min;
+ phase_code = (code_min + code_max) / 2;
+ }
+ }
+ }
+ }
+
+ /* Handle tuning failure case */
+ if ((is_sd && phase_code == -1) ||
+ (!is_sd && code_min == -1 && code_max == -1)) {
+ pr_err("%s: phase code tuning failed!\n", mmc_hostname(host->mmc));
+ sdhci_writew(host, 0, priv->vendor_specific_area1 + DWCMSHC_AT_STAT);
+ return -EIO;
+ }
+ if (!is_sd)
+ phase_code = (code_min + code_max) / 2;
+
+ sdhci_writew(host, phase_code, priv->vendor_specific_area1 + DWCMSHC_AT_STAT);
+
+ /* SD specific final verification */
+ if (is_sd) {
+ ret = mmc_send_tuning(host->mmc, opcode, &cmd_error);
+ host->ops->reset(host, SDHCI_RESET_CMD | SDHCI_RESET_DATA);
+ if (ret) {
+ pr_err("%s: Final phase code 0x%x verification failed!\n",
+ mmc_hostname(host->mmc), phase_code);
+ return ret;
+ }
+ }
+
+ return 0;
+}
+
+static int sdhci_eic7700_executing_tuning(struct sdhci_host *host, u32 opcode)
+{
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ struct dwcmshc_priv *priv = sdhci_pltfm_priv(pltfm_host);
+ u32 emmc_caps = MMC_CAP2_NO_SD | MMC_CAP2_NO_SDIO;
+ int ret = 0;
+ u16 ctrl;
+ u32 val;
+
+ ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2);
+ ctrl &= ~SDHCI_CTRL_TUNED_CLK;
+ sdhci_writew(host, ctrl, SDHCI_HOST_CONTROL2);
+
+ val = sdhci_readl(host, priv->vendor_specific_area1 + DWCMSHC_EMMC_ATCTRL);
+ val |= AT_CTRL_SW_TUNE_EN;
+ sdhci_writew(host, val, priv->vendor_specific_area1 + DWCMSHC_EMMC_ATCTRL);
+
+ sdhci_writew(host, 0, priv->vendor_specific_area1 + DWCMSHC_AT_STAT);
+ sdhci_writew(host, 0x0, SDHCI_CMD_DATA);
+
+ if ((host->mmc->caps2 & emmc_caps) == emmc_caps) {
+ ret = sdhci_eic7700_delay_tuning(host, opcode);
+ if (ret)
+ return ret;
+ }
+
+ ret = sdhci_eic7700_phase_code_tuning(host, opcode);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+static void sdhci_eic7700_set_uhs_signaling(struct sdhci_host *host, unsigned int timing)
+{
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ struct dwcmshc_priv *priv = sdhci_pltfm_priv(pltfm_host);
+ u8 status;
+ u32 val;
+ int ret;
+
+ dwcmshc_set_uhs_signaling(host, timing);
+
+ /* here need make dll locked when in hs400 at 200MHz */
+ if (timing == MMC_TIMING_MMC_HS400 && host->clock == 200000000) {
+ val = sdhci_readl(host, priv->vendor_specific_area1 + DWCMSHC_EMMC_ATCTRL);
+ val &= ~(FIELD_PREP(AT_CTRL_POST_CHANGE_DLY_MASK, AT_CTRL_POST_CHANGE_DLY));
+ /* 2-cycle latency */
+ val |= FIELD_PREP(AT_CTRL_POST_CHANGE_DLY_MASK, 0x2);
+ sdhci_writew(host, val, priv->vendor_specific_area1 + DWCMSHC_EMMC_ATCTRL);
+
+ sdhci_writeb(host, FIELD_PREP(PHY_DLL_CNFG1_SLVDLY_MASK, PHY_DLL_CNFG1_SLVDLY) |
+ 0x3, PHY_DLL_CNFG1_R);/* DLL wait cycle input */
+ /* DLL jump step input */
+ sdhci_writeb(host, 0x02, PHY_DLL_CNFG2_R);
+ sdhci_writeb(host, FIELD_PREP(PHY_DLLDL_CNFG_SLV_INPSEL_MASK,
+ PHY_DLLDL_CNFG_SLV_INPSEL), PHY_DLLDL_CNFG_R);
+ /* Sets the value of DLL's offset input */
+ sdhci_writeb(host, 0x00, PHY_DLL_OFFST_R);
+ /*
+ * Sets the value of DLL's olbt loadval input. Controls the Ibt
+ * timer's timeout value at which DLL runs a revalidation cycle.
+ */
+ sdhci_writew(host, 0xffff, PHY_DLLBT_CNFG_R);
+ sdhci_writeb(host, PHY_DLL_CTRL_ENABLE, PHY_DLL_CTRL_R);
+ usleep_range(100, 110);
+
+ ret = read_poll_timeout(sdhci_readb, status, status & DLL_LOCK_STS, 100, 1000000,
+ false, host, PHY_DLL_STATUS_R);
+ if (ret) {
+ pr_err("%s: DLL lock timeout! status: 0x%x\n",
+ mmc_hostname(host->mmc), status);
+ return;
+ }
+
+ status = sdhci_readb(host, PHY_DLL_STATUS_R);
+ if (status & DLL_ERROR_STS) {
+ pr_err("%s: DLL lock failed!err_status:0x%x\n",
+ mmc_hostname(host->mmc), status);
+ }
+ }
+}
+
+static void sdhci_eic7700_set_uhs_wrapper(struct sdhci_host *host, unsigned int timing)
+{
+ u32 sd_caps = MMC_CAP2_NO_MMC | MMC_CAP2_NO_SDIO;
+
+ if ((host->mmc->caps2 & sd_caps) == sd_caps)
+ sdhci_set_uhs_signaling(host, timing);
+ else
+ sdhci_eic7700_set_uhs_signaling(host, timing);
+}
+
+static int eic7700_init(struct device *dev, struct sdhci_host *host, struct dwcmshc_priv *dwc_priv)
+{
+ u32 emmc_caps = MMC_CAP2_NO_SD | MMC_CAP2_NO_SDIO;
+ unsigned int val, hsp_int_status, hsp_pwr_ctrl;
+ struct of_phandle_args args;
+ struct eic7700_priv *priv;
+ struct regmap *hsp_regmap;
+ int ret;
+
+ priv = devm_kzalloc(dev, sizeof(struct eic7700_priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ dwc_priv->priv = priv;
+
+ ret = sdhci_eic7700_reset_init(dev, dwc_priv->priv);
+ if (ret) {
+ dev_err(dev, "failed to reset\n");
+ return ret;
+ }
+
+ ret = of_parse_phandle_with_fixed_args(dev->of_node, "eswin,hsp-sp-csr", 2, 0, &args);
+ if (ret) {
+ dev_err(dev, "Fail to parse 'eswin,hsp-sp-csr' phandle (%d)\n", ret);
+ return ret;
+ }
+
+ hsp_regmap = syscon_node_to_regmap(args.np);
+ if (IS_ERR(hsp_regmap)) {
+ dev_err(dev, "Failed to get regmap for 'eswin,hsp-sp-csr'\n");
+ of_node_put(args.np);
+ return PTR_ERR(hsp_regmap);
+ }
+ hsp_int_status = args.args[0];
+ hsp_pwr_ctrl = args.args[1];
+ of_node_put(args.np);
+ /*
+ * Assert clock stability: write EIC7700_INT_CLK_STABLE to hsp_int_status.
+ * This signals to the eMMC controller that platform clocks (card, ACLK,
+ * BCLK, TMCLK) are enabled and stable.
+ */
+ regmap_write(hsp_regmap, hsp_int_status, EIC7700_INT_CLK_STABLE);
+ /*
+ * Assert voltage stability: write EIC7700_HOST_VAL_STABLE to hsp_pwr_ctrl.
+ * This signals that VDD is stable and permits transition to high-speed
+ * modes (e.g., UHS-I).
+ */
+ regmap_write(hsp_regmap, hsp_pwr_ctrl, EIC7700_HOST_VAL_STABLE);
+
+ if ((host->mmc->caps2 & emmc_caps) == emmc_caps)
+ dwc_priv->delay_line = PHY_DELAY_CODE_EMMC;
+ else
+ dwc_priv->delay_line = PHY_DELAY_CODE_SD;
+
+ if (!of_property_read_u32(dev->of_node, "eswin,drive-impedance-ohms", &val))
+ priv->drive_impedance = eic7700_convert_drive_impedance_ohm(dev, val);
+ return 0;
+}
+
static const struct sdhci_ops sdhci_dwcmshc_ops = {
.set_clock = sdhci_set_clock,
.set_bus_width = sdhci_set_bus_width,
.set_uhs_signaling = dwcmshc_set_uhs_signaling,
.get_max_clock = dwcmshc_get_max_clock,
- .reset = sdhci_reset,
+ .reset = dwcmshc_reset,
.adma_write_desc = dwcmshc_adma_write_desc,
.irq = dwcmshc_cqe_irq_handler,
};
@@ -1169,6 +1717,18 @@ static const struct sdhci_ops sdhci_dwcmshc_sg2042_ops = {
.platform_execute_tuning = th1520_execute_tuning,
};
+static const struct sdhci_ops sdhci_dwcmshc_eic7700_ops = {
+ .set_clock = sdhci_eic7700_set_clock,
+ .get_max_clock = sdhci_pltfm_clk_get_max_clock,
+ .get_timeout_clock = sdhci_pltfm_clk_get_max_clock,
+ .set_bus_width = sdhci_set_bus_width,
+ .reset = sdhci_eic7700_reset,
+ .set_uhs_signaling = sdhci_eic7700_set_uhs_wrapper,
+ .set_power = sdhci_set_power_and_bus_voltage,
+ .irq = dwcmshc_cqe_irq_handler,
+ .platform_execute_tuning = sdhci_eic7700_executing_tuning,
+};
+
static const struct dwcmshc_pltfm_data sdhci_dwcmshc_pdata = {
.pdata = {
.ops = &sdhci_dwcmshc_ops,
@@ -1188,6 +1748,15 @@ static const struct dwcmshc_pltfm_data sdhci_dwcmshc_bf3_pdata = {
};
#endif
+static const struct cqhci_host_ops rk35xx_cqhci_ops = {
+ .pre_enable = rk35xx_sdhci_cqe_pre_enable,
+ .enable = rk35xx_sdhci_cqe_enable,
+ .disable = rk35xx_sdhci_cqe_disable,
+ .post_disable = rk35xx_sdhci_cqe_post_disable,
+ .dumpregs = dwcmshc_cqhci_dumpregs,
+ .set_tran_desc = dwcmshc_set_tran_desc,
+};
+
static const struct dwcmshc_pltfm_data sdhci_dwcmshc_rk35xx_pdata = {
.pdata = {
.ops = &sdhci_dwcmshc_rk35xx_ops,
@@ -1196,6 +1765,7 @@ static const struct dwcmshc_pltfm_data sdhci_dwcmshc_rk35xx_pdata = {
.quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN |
SDHCI_QUIRK2_CLOCK_DIV_ZERO_BROKEN,
},
+ .cqhci_host_ops = &rk35xx_cqhci_ops,
.init = dwcmshc_rk35xx_init,
.postinit = dwcmshc_rk35xx_postinit,
};
@@ -1208,6 +1778,7 @@ static const struct dwcmshc_pltfm_data sdhci_dwcmshc_rk3576_pdata = {
.quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN |
SDHCI_QUIRK2_CLOCK_DIV_ZERO_BROKEN,
},
+ .cqhci_host_ops = &rk35xx_cqhci_ops,
.init = dwcmshc_rk35xx_init,
.postinit = dwcmshc_rk3576_postinit,
};
@@ -1238,6 +1809,17 @@ static const struct dwcmshc_pltfm_data sdhci_dwcmshc_sg2042_pdata = {
.init = sg2042_init,
};
+static const struct dwcmshc_pltfm_data sdhci_dwcmshc_eic7700_pdata = {
+ .pdata = {
+ .ops = &sdhci_dwcmshc_eic7700_ops,
+ .quirks = SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN |
+ SDHCI_QUIRK_BROKEN_TIMEOUT_VAL,
+ .quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN |
+ SDHCI_QUIRK2_CLOCK_DIV_ZERO_BROKEN,
+ },
+ .init = eic7700_init,
+};
+
static const struct cqhci_host_ops dwcmshc_cqhci_ops = {
.enable = dwcmshc_sdhci_cqe_enable,
.disable = sdhci_cqe_disable,
@@ -1245,7 +1827,8 @@ static const struct cqhci_host_ops dwcmshc_cqhci_ops = {
.set_tran_desc = dwcmshc_set_tran_desc,
};
-static void dwcmshc_cqhci_init(struct sdhci_host *host, struct platform_device *pdev)
+static void dwcmshc_cqhci_init(struct sdhci_host *host, struct platform_device *pdev,
+ const struct dwcmshc_pltfm_data *pltfm_data)
{
struct cqhci_host *cq_host;
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
@@ -1275,7 +1858,10 @@ static void dwcmshc_cqhci_init(struct sdhci_host *host, struct platform_device *
}
cq_host->mmio = host->ioaddr + priv->vendor_specific_area2;
- cq_host->ops = &dwcmshc_cqhci_ops;
+ if (pltfm_data->cqhci_host_ops)
+ cq_host->ops = pltfm_data->cqhci_host_ops;
+ else
+ cq_host->ops = &dwcmshc_cqhci_ops;
/* Enable using of 128-bit task descriptors */
dma64 = host->flags & SDHCI_USE_64_BIT_DMA;
@@ -1338,6 +1924,10 @@ static const struct of_device_id sdhci_dwcmshc_dt_ids[] = {
.compatible = "sophgo,sg2042-dwcmshc",
.data = &sdhci_dwcmshc_sg2042_pdata,
},
+ {
+ .compatible = "eswin,eic7700-dwcmshc",
+ .data = &sdhci_dwcmshc_eic7700_pdata,
+ },
{},
};
MODULE_DEVICE_TABLE(of, sdhci_dwcmshc_dt_ids);
@@ -1443,7 +2033,7 @@ static int dwcmshc_probe(struct platform_device *pdev)
priv->vendor_specific_area2 =
sdhci_readw(host, DWCMSHC_P_VENDOR_AREA2);
- dwcmshc_cqhci_init(host, pdev);
+ dwcmshc_cqhci_init(host, pdev, pltfm_data);
}
if (pltfm_data->postinit)
@@ -1570,17 +2160,6 @@ disable_clk:
return ret;
}
-static void dwcmshc_enable_card_clk(struct sdhci_host *host)
-{
- u16 ctrl;
-
- ctrl = sdhci_readw(host, SDHCI_CLOCK_CONTROL);
- if ((ctrl & SDHCI_CLOCK_INT_EN) && !(ctrl & SDHCI_CLOCK_CARD_EN)) {
- ctrl |= SDHCI_CLOCK_CARD_EN;
- sdhci_writew(host, ctrl, SDHCI_CLOCK_CONTROL);
- }
-}
-
static int dwcmshc_runtime_suspend(struct device *dev)
{
struct sdhci_host *host = dev_get_drvdata(dev);
generated by cgit v1.2.3 (git 2.46.0) at 2025-12-05 23:34:43 +0000