--- /dev/null
+/*
+ * Driver for Marvell SOC Platform Group Xenon SDHC as a platform device
+ *
+ * Copyright (C) 2016 Marvell, All Rights Reserved.
+ *
+ * Author: Victor Gu <xigu@marvell.com>
+ * Date: 2016-8-24
+ *
+ * Included parts of the Linux driver version which was written by:
+ * Hu Ziji <huziji@marvell.com>
+ *
+ * Ported to from Marvell 2015.01 to mainline U-Boot 2017.01:
+ * Stefan Roese <sr@denx.de>
+ *
+ * SPDX-License-Identifier: GPL-2.0
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <fdtdec.h>
+#include <libfdt.h>
+#include <malloc.h>
+#include <sdhci.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+/* Register Offset of SD Host Controller SOCP self-defined register */
+#define SDHC_SYS_CFG_INFO 0x0104
+#define SLOT_TYPE_SDIO_SHIFT 24
+#define SLOT_TYPE_EMMC_MASK 0xFF
+#define SLOT_TYPE_EMMC_SHIFT 16
+#define SLOT_TYPE_SD_SDIO_MMC_MASK 0xFF
+#define SLOT_TYPE_SD_SDIO_MMC_SHIFT 8
+#define NR_SUPPORTED_SLOT_MASK 0x7
+
+#define SDHC_SYS_OP_CTRL 0x0108
+#define AUTO_CLKGATE_DISABLE_MASK BIT(20)
+#define SDCLK_IDLEOFF_ENABLE_SHIFT 8
+#define SLOT_ENABLE_SHIFT 0
+
+#define SDHC_SYS_EXT_OP_CTRL 0x010C
+#define MASK_CMD_CONFLICT_ERROR BIT(8)
+
+#define SDHC_SLOT_RETUNING_REQ_CTRL 0x0144
+/* retuning compatible */
+#define RETUNING_COMPATIBLE 0x1
+
+/* Xenon specific Mode Select value */
+#define XENON_SDHCI_CTRL_HS200 0x5
+#define XENON_SDHCI_CTRL_HS400 0x6
+
+#define EMMC_PHY_REG_BASE 0x170
+#define EMMC_PHY_TIMING_ADJUST EMMC_PHY_REG_BASE
+#define OUTPUT_QSN_PHASE_SELECT BIT(17)
+#define SAMPL_INV_QSP_PHASE_SELECT BIT(18)
+#define SAMPL_INV_QSP_PHASE_SELECT_SHIFT 18
+#define EMMC_PHY_SLOW_MODE BIT(29)
+#define PHY_INITIALIZAION BIT(31)
+#define WAIT_CYCLE_BEFORE_USING_MASK 0xf
+#define WAIT_CYCLE_BEFORE_USING_SHIFT 12
+#define FC_SYNC_EN_DURATION_MASK 0xf
+#define FC_SYNC_EN_DURATION_SHIFT 8
+#define FC_SYNC_RST_EN_DURATION_MASK 0xf
+#define FC_SYNC_RST_EN_DURATION_SHIFT 4
+#define FC_SYNC_RST_DURATION_MASK 0xf
+#define FC_SYNC_RST_DURATION_SHIFT 0
+
+#define EMMC_PHY_FUNC_CONTROL (EMMC_PHY_REG_BASE + 0x4)
+#define DQ_ASYNC_MODE BIT(4)
+#define DQ_DDR_MODE_SHIFT 8
+#define DQ_DDR_MODE_MASK 0xff
+#define CMD_DDR_MODE BIT(16)
+
+#define EMMC_PHY_PAD_CONTROL (EMMC_PHY_REG_BASE + 0x8)
+#define REC_EN_SHIFT 24
+#define REC_EN_MASK 0xf
+#define FC_DQ_RECEN BIT(24)
+#define FC_CMD_RECEN BIT(25)
+#define FC_QSP_RECEN BIT(26)
+#define FC_QSN_RECEN BIT(27)
+#define OEN_QSN BIT(28)
+#define AUTO_RECEN_CTRL BIT(30)
+
+#define EMMC_PHY_PAD_CONTROL1 (EMMC_PHY_REG_BASE + 0xc)
+#define EMMC5_1_FC_QSP_PD BIT(9)
+#define EMMC5_1_FC_QSP_PU BIT(25)
+#define EMMC5_1_FC_CMD_PD BIT(8)
+#define EMMC5_1_FC_CMD_PU BIT(24)
+#define EMMC5_1_FC_DQ_PD 0xff
+#define EMMC5_1_FC_DQ_PU (0xff << 16)
+
+#define SDHCI_RETUNE_EVT_INTSIG 0x00001000
+
+/* Hyperion only have one slot 0 */
+#define XENON_MMC_SLOT_ID_HYPERION 0
+
+#define MMC_TIMING_LEGACY 0
+#define MMC_TIMING_MMC_HS 1
+#define MMC_TIMING_SD_HS 2
+#define MMC_TIMING_UHS_SDR12 3
+#define MMC_TIMING_UHS_SDR25 4
+#define MMC_TIMING_UHS_SDR50 5
+#define MMC_TIMING_UHS_SDR104 6
+#define MMC_TIMING_UHS_DDR50 7
+#define MMC_TIMING_MMC_DDR52 8
+#define MMC_TIMING_MMC_HS200 9
+#define MMC_TIMING_MMC_HS400 10
+
+#define XENON_MMC_MAX_CLK 400000000
+
+enum soc_pad_ctrl_type {
+ SOC_PAD_SD,
+ SOC_PAD_FIXED_1_8V,
+};
+
+struct xenon_sdhci_plat {
+ struct mmc_config cfg;
+ struct mmc mmc;
+};
+
+struct xenon_sdhci_priv {
+ struct sdhci_host host;
+
+ u8 timing;
+
+ unsigned int clock;
+
+ void *pad_ctrl_reg;
+ int pad_type;
+};
+
+static int xenon_mmc_phy_init(struct sdhci_host *host)
+{
+ struct xenon_sdhci_priv *priv = host->mmc->priv;
+ u32 clock = priv->clock;
+ u32 time;
+ u32 var;
+
+ /* Enable QSP PHASE SELECT */
+ var = sdhci_readl(host, EMMC_PHY_TIMING_ADJUST);
+ var |= SAMPL_INV_QSP_PHASE_SELECT;
+ if ((priv->timing == MMC_TIMING_UHS_SDR50) ||
+ (priv->timing == MMC_TIMING_UHS_SDR25) ||
+ (priv->timing == MMC_TIMING_UHS_SDR12) ||
+ (priv->timing == MMC_TIMING_SD_HS) ||
+ (priv->timing == MMC_TIMING_LEGACY))
+ var |= EMMC_PHY_SLOW_MODE;
+ sdhci_writel(host, var, EMMC_PHY_TIMING_ADJUST);
+
+ /* Poll for host MMC PHY clock init to be stable */
+ /* Wait up to 10ms */
+ time = 100;
+ while (time--) {
+ var = sdhci_readl(host, SDHCI_CLOCK_CONTROL);
+ if (var & SDHCI_CLOCK_INT_STABLE)
+ break;
+
+ udelay(100);
+ }
+
+ if (time <= 0) {
+ error("Failed to enable MMC internal clock in time\n");
+ return -ETIMEDOUT;
+ }
+
+ /* Init PHY */
+ var = sdhci_readl(host, EMMC_PHY_TIMING_ADJUST);
+ var |= PHY_INITIALIZAION;
+ sdhci_writel(host, var, EMMC_PHY_TIMING_ADJUST);
+
+ if (clock == 0) {
+ /* Use the possibly slowest bus frequency value */
+ clock = 100000;
+ }
+
+ /* Poll for host eMMC PHY init to complete */
+ /* Wait up to 10ms */
+ time = 100;
+ while (time--) {
+ var = sdhci_readl(host, EMMC_PHY_TIMING_ADJUST);
+ var &= PHY_INITIALIZAION;
+ if (!var)
+ break;
+
+ /* wait for host eMMC PHY init to complete */
+ udelay(100);
+ }
+
+ if (time <= 0) {
+ error("Failed to init MMC PHY in time\n");
+ return -ETIMEDOUT;
+ }
+
+ return 0;
+}
+
+#define ARMADA_3700_SOC_PAD_1_8V 0x1
+#define ARMADA_3700_SOC_PAD_3_3V 0x0
+
+static void armada_3700_soc_pad_voltage_set(struct sdhci_host *host)
+{
+ struct xenon_sdhci_priv *priv = host->mmc->priv;
+
+ if (priv->pad_type == SOC_PAD_FIXED_1_8V)
+ writel(ARMADA_3700_SOC_PAD_1_8V, priv->pad_ctrl_reg);
+ else if (priv->pad_type == SOC_PAD_SD)
+ writel(ARMADA_3700_SOC_PAD_3_3V, priv->pad_ctrl_reg);
+}
+
+static void xenon_mmc_phy_set(struct sdhci_host *host)
+{
+ struct xenon_sdhci_priv *priv = host->mmc->priv;
+ u32 var;
+
+ /* Setup pad, set bit[30], bit[28] and bits[26:24] */
+ var = sdhci_readl(host, EMMC_PHY_PAD_CONTROL);
+ var |= AUTO_RECEN_CTRL | OEN_QSN | FC_QSP_RECEN |
+ FC_CMD_RECEN | FC_DQ_RECEN;
+ sdhci_writel(host, var, EMMC_PHY_PAD_CONTROL);
+
+ /* Set CMD and DQ Pull Up */
+ var = sdhci_readl(host, EMMC_PHY_PAD_CONTROL1);
+ var |= (EMMC5_1_FC_CMD_PU | EMMC5_1_FC_DQ_PU);
+ var &= ~(EMMC5_1_FC_CMD_PD | EMMC5_1_FC_DQ_PD);
+ sdhci_writel(host, var, EMMC_PHY_PAD_CONTROL1);
+
+ /*
+ * If timing belongs to high speed, set bit[17] of
+ * EMMC_PHY_TIMING_ADJUST register
+ */
+ if ((priv->timing == MMC_TIMING_MMC_HS400) ||
+ (priv->timing == MMC_TIMING_MMC_HS200) ||
+ (priv->timing == MMC_TIMING_UHS_SDR50) ||
+ (priv->timing == MMC_TIMING_UHS_SDR104) ||
+ (priv->timing == MMC_TIMING_UHS_DDR50) ||
+ (priv->timing == MMC_TIMING_UHS_SDR25) ||
+ (priv->timing == MMC_TIMING_MMC_DDR52)) {
+ var = sdhci_readl(host, EMMC_PHY_TIMING_ADJUST);
+ var |= OUTPUT_QSN_PHASE_SELECT;
+ sdhci_writel(host, var, EMMC_PHY_TIMING_ADJUST);
+ }
+
+ /*
+ * When setting EMMC_PHY_FUNC_CONTROL register,
+ * SD clock should be disabled
+ */
+ var = sdhci_readl(host, SDHCI_CLOCK_CONTROL);
+ var &= ~SDHCI_CLOCK_CARD_EN;
+ sdhci_writew(host, var, SDHCI_CLOCK_CONTROL);
+
+ var = sdhci_readl(host, EMMC_PHY_FUNC_CONTROL);
+ if (host->mmc->ddr_mode) {
+ var |= (DQ_DDR_MODE_MASK << DQ_DDR_MODE_SHIFT) | CMD_DDR_MODE;
+ } else {
+ var &= ~((DQ_DDR_MODE_MASK << DQ_DDR_MODE_SHIFT) |
+ CMD_DDR_MODE);
+ }
+ sdhci_writel(host, var, EMMC_PHY_FUNC_CONTROL);
+
+ /* Enable bus clock */
+ var = sdhci_readl(host, SDHCI_CLOCK_CONTROL);
+ var |= SDHCI_CLOCK_CARD_EN;
+ sdhci_writew(host, var, SDHCI_CLOCK_CONTROL);
+
+ xenon_mmc_phy_init(host);
+}
+
+/* Enable/Disable the Auto Clock Gating function of this slot */
+static void xenon_mmc_set_acg(struct sdhci_host *host, bool enable)
+{
+ u32 var;
+
+ var = sdhci_readl(host, SDHC_SYS_OP_CTRL);
+ if (enable)
+ var &= ~AUTO_CLKGATE_DISABLE_MASK;
+ else
+ var |= AUTO_CLKGATE_DISABLE_MASK;
+
+ sdhci_writel(host, var, SDHC_SYS_OP_CTRL);
+}
+
+#define SLOT_MASK(slot) BIT(slot)
+
+/* Enable specific slot */
+static void xenon_mmc_enable_slot(struct sdhci_host *host, u8 slot)
+{
+ u32 var;
+
+ var = sdhci_readl(host, SDHC_SYS_OP_CTRL);
+ var |= SLOT_MASK(slot) << SLOT_ENABLE_SHIFT;
+ sdhci_writel(host, var, SDHC_SYS_OP_CTRL);
+}
+
+/* Enable Parallel Transfer Mode */
+static void xenon_mmc_enable_parallel_tran(struct sdhci_host *host, u8 slot)
+{
+ u32 var;
+
+ var = sdhci_readl(host, SDHC_SYS_EXT_OP_CTRL);
+ var |= SLOT_MASK(slot);
+ sdhci_writel(host, var, SDHC_SYS_EXT_OP_CTRL);
+}
+
+static void xenon_mmc_disable_tuning(struct sdhci_host *host, u8 slot)
+{
+ u32 var;
+
+ /* Clear the Re-Tuning Request functionality */
+ var = sdhci_readl(host, SDHC_SLOT_RETUNING_REQ_CTRL);
+ var &= ~RETUNING_COMPATIBLE;
+ sdhci_writel(host, var, SDHC_SLOT_RETUNING_REQ_CTRL);
+
+ /* Clear the Re-tuning Event Signal Enable */
+ var = sdhci_readl(host, SDHCI_SIGNAL_ENABLE);
+ var &= ~SDHCI_RETUNE_EVT_INTSIG;
+ sdhci_writel(host, var, SDHCI_SIGNAL_ENABLE);
+}
+
+/* Mask command conflict error */
+static void xenon_mask_cmd_conflict_err(struct sdhci_host *host)
+{
+ u32 reg;
+
+ reg = sdhci_readl(host, SDHC_SYS_EXT_OP_CTRL);
+ reg |= MASK_CMD_CONFLICT_ERROR;
+ sdhci_writel(host, reg, SDHC_SYS_EXT_OP_CTRL);
+}
+
+/* Platform specific function for post set_ios configuration */
+static void xenon_sdhci_set_ios_post(struct sdhci_host *host)
+{
+ struct xenon_sdhci_priv *priv = host->mmc->priv;
+ uint speed = host->mmc->tran_speed;
+ int pwr_18v = 0;
+
+ if ((sdhci_readb(host, SDHCI_POWER_CONTROL) & ~SDHCI_POWER_ON) ==
+ SDHCI_POWER_180)
+ pwr_18v = 1;
+
+ /* Set timing variable according to the configured speed */
+ if (IS_SD(host->mmc)) {
+ /* SD/SDIO */
+ if (pwr_18v) {
+ if (host->mmc->ddr_mode)
+ priv->timing = MMC_TIMING_UHS_DDR50;
+ else if (speed <= 25000000)
+ priv->timing = MMC_TIMING_UHS_SDR25;
+ else
+ priv->timing = MMC_TIMING_UHS_SDR50;
+ } else {
+ if (speed <= 25000000)
+ priv->timing = MMC_TIMING_LEGACY;
+ else
+ priv->timing = MMC_TIMING_SD_HS;
+ }
+ } else {
+ /* eMMC */
+ if (host->mmc->ddr_mode)
+ priv->timing = MMC_TIMING_MMC_DDR52;
+ else if (speed <= 26000000)
+ priv->timing = MMC_TIMING_LEGACY;
+ else
+ priv->timing = MMC_TIMING_MMC_HS;
+ }
+
+ /* Re-init the PHY */
+ xenon_mmc_phy_set(host);
+}
+
+/* Install a driver specific handler for post set_ios configuration */
+static const struct sdhci_ops xenon_sdhci_ops = {
+ .set_ios_post = xenon_sdhci_set_ios_post
+};
+
+static int xenon_sdhci_probe(struct udevice *dev)
+{
+ struct xenon_sdhci_plat *plat = dev_get_platdata(dev);
+ struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
+ struct xenon_sdhci_priv *priv = dev_get_priv(dev);
+ struct sdhci_host *host = dev_get_priv(dev);
+ int ret;
+
+ host->mmc = &plat->mmc;
+ host->mmc->priv = host;
+ host->mmc->dev = dev;
+ upriv->mmc = host->mmc;
+
+ /* Set quirks */
+ host->quirks = SDHCI_QUIRK_WAIT_SEND_CMD | SDHCI_QUIRK_32BIT_DMA_ADDR;
+
+ /* Set default timing */
+ priv->timing = MMC_TIMING_LEGACY;
+
+ /* Disable auto clock gating during init */
+ xenon_mmc_set_acg(host, false);
+
+ /* Enable slot */
+ xenon_mmc_enable_slot(host, XENON_MMC_SLOT_ID_HYPERION);
+
+ /*
+ * Set default power on SoC PHY PAD register (currently only
+ * available on the Armada 3700)
+ */
+ if (priv->pad_ctrl_reg)
+ armada_3700_soc_pad_voltage_set(host);
+
+ host->host_caps = MMC_MODE_HS | MMC_MODE_HS_52MHz | MMC_MODE_DDR_52MHz;
+ switch (fdtdec_get_int(gd->fdt_blob, dev->of_offset, "bus-width", 1)) {
+ case 8:
+ host->host_caps |= MMC_MODE_8BIT;
+ break;
+ case 4:
+ host->host_caps |= MMC_MODE_4BIT;
+ break;
+ case 1:
+ break;
+ default:
+ printf("Invalid \"bus-width\" value\n");
+ return -EINVAL;
+ }
+
+ host->ops = &xenon_sdhci_ops;
+
+ ret = sdhci_setup_cfg(&plat->cfg, host, XENON_MMC_MAX_CLK, 0);
+ if (ret)
+ return ret;
+
+ ret = sdhci_probe(dev);
+ if (ret)
+ return ret;
+
+ /* Enable parallel transfer */
+ xenon_mmc_enable_parallel_tran(host, XENON_MMC_SLOT_ID_HYPERION);
+
+ /* Disable tuning functionality of this slot */
+ xenon_mmc_disable_tuning(host, XENON_MMC_SLOT_ID_HYPERION);
+
+ /* Enable auto clock gating after init */
+ xenon_mmc_set_acg(host, true);
+
+ xenon_mask_cmd_conflict_err(host);
+
+ return ret;
+}
+
+static int xenon_sdhci_ofdata_to_platdata(struct udevice *dev)
+{
+ struct sdhci_host *host = dev_get_priv(dev);
+ struct xenon_sdhci_priv *priv = dev_get_priv(dev);
+ const char *name;
+
+ host->name = dev->name;
+ host->ioaddr = (void *)dev_get_addr(dev);
+
+ if (of_device_is_compatible(dev, "marvell,armada-3700-sdhci"))
+ priv->pad_ctrl_reg = (void *)dev_get_addr_index(dev, 1);
+
+ name = fdt_getprop(gd->fdt_blob, dev->of_offset, "marvell,pad-type",
+ NULL);
+ if (name) {
+ if (0 == strncmp(name, "sd", 2)) {
+ priv->pad_type = SOC_PAD_SD;
+ } else if (0 == strncmp(name, "fixed-1-8v", 10)) {
+ priv->pad_type = SOC_PAD_FIXED_1_8V;
+ } else {
+ printf("Unsupported SOC PHY PAD ctrl type %s\n", name);
+ return -EINVAL;
+ }
+ }
+
+ return 0;
+}
+
+static int xenon_sdhci_bind(struct udevice *dev)
+{
+ struct xenon_sdhci_plat *plat = dev_get_platdata(dev);
+
+ return sdhci_bind(dev, &plat->mmc, &plat->cfg);
+}
+
+static const struct udevice_id xenon_sdhci_ids[] = {
+ { .compatible = "marvell,armada-8k-sdhci",},
+ { .compatible = "marvell,armada-3700-sdhci",},
+ { }
+};
+
+U_BOOT_DRIVER(xenon_sdhci_drv) = {
+ .name = "xenon_sdhci",
+ .id = UCLASS_MMC,
+ .of_match = xenon_sdhci_ids,
+ .ofdata_to_platdata = xenon_sdhci_ofdata_to_platdata,
+ .ops = &sdhci_ops,
+ .bind = xenon_sdhci_bind,
+ .probe = xenon_sdhci_probe,
+ .priv_auto_alloc_size = sizeof(struct xenon_sdhci_priv),
+ .platdata_auto_alloc_size = sizeof(struct xenon_sdhci_plat),
+};
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