1a10e763bSThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only 206c8b667SHu Ziji /* 306c8b667SHu Ziji * PHY support for Xenon SDHC 406c8b667SHu Ziji * 506c8b667SHu Ziji * Copyright (C) 2016 Marvell, All Rights Reserved. 606c8b667SHu Ziji * 706c8b667SHu Ziji * Author: Hu Ziji <huziji@marvell.com> 806c8b667SHu Ziji * Date: 2016-8-24 906c8b667SHu Ziji */ 1006c8b667SHu Ziji 1106c8b667SHu Ziji #include <linux/slab.h> 1206c8b667SHu Ziji #include <linux/delay.h> 1306c8b667SHu Ziji #include <linux/ktime.h> 1406c8b667SHu Ziji #include <linux/of_address.h> 1506c8b667SHu Ziji 1606c8b667SHu Ziji #include "sdhci-pltfm.h" 1706c8b667SHu Ziji #include "sdhci-xenon.h" 1806c8b667SHu Ziji 1906c8b667SHu Ziji /* Register base for eMMC PHY 5.0 Version */ 2006c8b667SHu Ziji #define XENON_EMMC_5_0_PHY_REG_BASE 0x0160 2106c8b667SHu Ziji /* Register base for eMMC PHY 5.1 Version */ 2206c8b667SHu Ziji #define XENON_EMMC_PHY_REG_BASE 0x0170 2306c8b667SHu Ziji 2406c8b667SHu Ziji #define XENON_EMMC_PHY_TIMING_ADJUST XENON_EMMC_PHY_REG_BASE 2506c8b667SHu Ziji #define XENON_EMMC_5_0_PHY_TIMING_ADJUST XENON_EMMC_5_0_PHY_REG_BASE 2606c8b667SHu Ziji #define XENON_TIMING_ADJUST_SLOW_MODE BIT(29) 2706c8b667SHu Ziji #define XENON_TIMING_ADJUST_SDIO_MODE BIT(28) 2806c8b667SHu Ziji #define XENON_SAMPL_INV_QSP_PHASE_SELECT BIT(18) 2906c8b667SHu Ziji #define XENON_SAMPL_INV_QSP_PHASE_SELECT_SHIFT 18 3006c8b667SHu Ziji #define XENON_PHY_INITIALIZAION BIT(31) 3106c8b667SHu Ziji #define XENON_WAIT_CYCLE_BEFORE_USING_MASK 0xF 3206c8b667SHu Ziji #define XENON_WAIT_CYCLE_BEFORE_USING_SHIFT 12 3306c8b667SHu Ziji #define XENON_FC_SYNC_EN_DURATION_MASK 0xF 3406c8b667SHu Ziji #define XENON_FC_SYNC_EN_DURATION_SHIFT 8 3506c8b667SHu Ziji #define XENON_FC_SYNC_RST_EN_DURATION_MASK 0xF 3606c8b667SHu Ziji #define XENON_FC_SYNC_RST_EN_DURATION_SHIFT 4 3706c8b667SHu Ziji #define XENON_FC_SYNC_RST_DURATION_MASK 0xF 3806c8b667SHu Ziji #define XENON_FC_SYNC_RST_DURATION_SHIFT 0 3906c8b667SHu Ziji 4006c8b667SHu Ziji #define XENON_EMMC_PHY_FUNC_CONTROL (XENON_EMMC_PHY_REG_BASE + 0x4) 4106c8b667SHu Ziji #define XENON_EMMC_5_0_PHY_FUNC_CONTROL \ 4206c8b667SHu Ziji (XENON_EMMC_5_0_PHY_REG_BASE + 0x4) 4306c8b667SHu Ziji #define XENON_ASYNC_DDRMODE_MASK BIT(23) 4406c8b667SHu Ziji #define XENON_ASYNC_DDRMODE_SHIFT 23 4506c8b667SHu Ziji #define XENON_CMD_DDR_MODE BIT(16) 4606c8b667SHu Ziji #define XENON_DQ_DDR_MODE_SHIFT 8 4706c8b667SHu Ziji #define XENON_DQ_DDR_MODE_MASK 0xFF 4806c8b667SHu Ziji #define XENON_DQ_ASYNC_MODE BIT(4) 4906c8b667SHu Ziji 5006c8b667SHu Ziji #define XENON_EMMC_PHY_PAD_CONTROL (XENON_EMMC_PHY_REG_BASE + 0x8) 5106c8b667SHu Ziji #define XENON_EMMC_5_0_PHY_PAD_CONTROL \ 5206c8b667SHu Ziji (XENON_EMMC_5_0_PHY_REG_BASE + 0x8) 5306c8b667SHu Ziji #define XENON_REC_EN_SHIFT 24 5406c8b667SHu Ziji #define XENON_REC_EN_MASK 0xF 5506c8b667SHu Ziji #define XENON_FC_DQ_RECEN BIT(24) 5606c8b667SHu Ziji #define XENON_FC_CMD_RECEN BIT(25) 5706c8b667SHu Ziji #define XENON_FC_QSP_RECEN BIT(26) 5806c8b667SHu Ziji #define XENON_FC_QSN_RECEN BIT(27) 5906c8b667SHu Ziji #define XENON_OEN_QSN BIT(28) 6006c8b667SHu Ziji #define XENON_AUTO_RECEN_CTRL BIT(30) 6106c8b667SHu Ziji #define XENON_FC_ALL_CMOS_RECEIVER 0xF000 6206c8b667SHu Ziji 6306c8b667SHu Ziji #define XENON_EMMC5_FC_QSP_PD BIT(18) 6406c8b667SHu Ziji #define XENON_EMMC5_FC_QSP_PU BIT(22) 6506c8b667SHu Ziji #define XENON_EMMC5_FC_CMD_PD BIT(17) 6606c8b667SHu Ziji #define XENON_EMMC5_FC_CMD_PU BIT(21) 6706c8b667SHu Ziji #define XENON_EMMC5_FC_DQ_PD BIT(16) 6806c8b667SHu Ziji #define XENON_EMMC5_FC_DQ_PU BIT(20) 6906c8b667SHu Ziji 7006c8b667SHu Ziji #define XENON_EMMC_PHY_PAD_CONTROL1 (XENON_EMMC_PHY_REG_BASE + 0xC) 7106c8b667SHu Ziji #define XENON_EMMC5_1_FC_QSP_PD BIT(9) 7206c8b667SHu Ziji #define XENON_EMMC5_1_FC_QSP_PU BIT(25) 7306c8b667SHu Ziji #define XENON_EMMC5_1_FC_CMD_PD BIT(8) 7406c8b667SHu Ziji #define XENON_EMMC5_1_FC_CMD_PU BIT(24) 7506c8b667SHu Ziji #define XENON_EMMC5_1_FC_DQ_PD 0xFF 7606c8b667SHu Ziji #define XENON_EMMC5_1_FC_DQ_PU (0xFF << 16) 7706c8b667SHu Ziji 7806c8b667SHu Ziji #define XENON_EMMC_PHY_PAD_CONTROL2 (XENON_EMMC_PHY_REG_BASE + 0x10) 7906c8b667SHu Ziji #define XENON_EMMC_5_0_PHY_PAD_CONTROL2 \ 8006c8b667SHu Ziji (XENON_EMMC_5_0_PHY_REG_BASE + 0xC) 8106c8b667SHu Ziji #define XENON_ZNR_MASK 0x1F 8206c8b667SHu Ziji #define XENON_ZNR_SHIFT 8 8306c8b667SHu Ziji #define XENON_ZPR_MASK 0x1F 8406c8b667SHu Ziji /* Preferred ZNR and ZPR value vary between different boards. 8506c8b667SHu Ziji * The specific ZNR and ZPR value should be defined here 8606c8b667SHu Ziji * according to board actual timing. 8706c8b667SHu Ziji */ 8806c8b667SHu Ziji #define XENON_ZNR_DEF_VALUE 0xF 8906c8b667SHu Ziji #define XENON_ZPR_DEF_VALUE 0xF 9006c8b667SHu Ziji 9106c8b667SHu Ziji #define XENON_EMMC_PHY_DLL_CONTROL (XENON_EMMC_PHY_REG_BASE + 0x14) 9206c8b667SHu Ziji #define XENON_EMMC_5_0_PHY_DLL_CONTROL \ 9306c8b667SHu Ziji (XENON_EMMC_5_0_PHY_REG_BASE + 0x10) 9406c8b667SHu Ziji #define XENON_DLL_ENABLE BIT(31) 9506c8b667SHu Ziji #define XENON_DLL_UPDATE_STROBE_5_0 BIT(30) 9606c8b667SHu Ziji #define XENON_DLL_REFCLK_SEL BIT(30) 9706c8b667SHu Ziji #define XENON_DLL_UPDATE BIT(23) 9806c8b667SHu Ziji #define XENON_DLL_PHSEL1_SHIFT 24 9906c8b667SHu Ziji #define XENON_DLL_PHSEL0_SHIFT 16 10006c8b667SHu Ziji #define XENON_DLL_PHASE_MASK 0x3F 10106c8b667SHu Ziji #define XENON_DLL_PHASE_90_DEGREE 0x1F 10206c8b667SHu Ziji #define XENON_DLL_FAST_LOCK BIT(5) 10306c8b667SHu Ziji #define XENON_DLL_GAIN2X BIT(3) 10406c8b667SHu Ziji #define XENON_DLL_BYPASS_EN BIT(0) 10506c8b667SHu Ziji 10606c8b667SHu Ziji #define XENON_EMMC_5_0_PHY_LOGIC_TIMING_ADJUST \ 10706c8b667SHu Ziji (XENON_EMMC_5_0_PHY_REG_BASE + 0x14) 108a04b9b47SHu Ziji #define XENON_EMMC_5_0_PHY_LOGIC_TIMING_VALUE 0x5A54 10906c8b667SHu Ziji #define XENON_EMMC_PHY_LOGIC_TIMING_ADJUST (XENON_EMMC_PHY_REG_BASE + 0x18) 11006c8b667SHu Ziji #define XENON_LOGIC_TIMING_VALUE 0x00AA8977 11106c8b667SHu Ziji 11206c8b667SHu Ziji /* 11306c8b667SHu Ziji * List offset of PHY registers and some special register values 11406c8b667SHu Ziji * in eMMC PHY 5.0 or eMMC PHY 5.1 11506c8b667SHu Ziji */ 11606c8b667SHu Ziji struct xenon_emmc_phy_regs { 11706c8b667SHu Ziji /* Offset of Timing Adjust register */ 11806c8b667SHu Ziji u16 timing_adj; 11906c8b667SHu Ziji /* Offset of Func Control register */ 12006c8b667SHu Ziji u16 func_ctrl; 12106c8b667SHu Ziji /* Offset of Pad Control register */ 12206c8b667SHu Ziji u16 pad_ctrl; 12306c8b667SHu Ziji /* Offset of Pad Control register 2 */ 12406c8b667SHu Ziji u16 pad_ctrl2; 12506c8b667SHu Ziji /* Offset of DLL Control register */ 12606c8b667SHu Ziji u16 dll_ctrl; 12706c8b667SHu Ziji /* Offset of Logic Timing Adjust register */ 12806c8b667SHu Ziji u16 logic_timing_adj; 12906c8b667SHu Ziji /* DLL Update Enable bit */ 13006c8b667SHu Ziji u32 dll_update; 131a04b9b47SHu Ziji /* value in Logic Timing Adjustment register */ 132a04b9b47SHu Ziji u32 logic_timing_val; 13306c8b667SHu Ziji }; 13406c8b667SHu Ziji 13506c8b667SHu Ziji static const char * const phy_types[] = { 13606c8b667SHu Ziji "emmc 5.0 phy", 13706c8b667SHu Ziji "emmc 5.1 phy" 13806c8b667SHu Ziji }; 13906c8b667SHu Ziji 14006c8b667SHu Ziji enum xenon_phy_type_enum { 14106c8b667SHu Ziji EMMC_5_0_PHY, 14206c8b667SHu Ziji EMMC_5_1_PHY, 14306c8b667SHu Ziji NR_PHY_TYPES 14406c8b667SHu Ziji }; 14506c8b667SHu Ziji 146298269c6SHu Ziji enum soc_pad_ctrl_type { 147298269c6SHu Ziji SOC_PAD_SD, 148298269c6SHu Ziji SOC_PAD_FIXED_1_8V, 149298269c6SHu Ziji }; 150298269c6SHu Ziji 151298269c6SHu Ziji struct soc_pad_ctrl { 152298269c6SHu Ziji /* Register address of SoC PHY PAD ctrl */ 153298269c6SHu Ziji void __iomem *reg; 154298269c6SHu Ziji /* SoC PHY PAD ctrl type */ 155298269c6SHu Ziji enum soc_pad_ctrl_type pad_type; 156298269c6SHu Ziji /* SoC specific operation to set SoC PHY PAD */ 157298269c6SHu Ziji void (*set_soc_pad)(struct sdhci_host *host, 158298269c6SHu Ziji unsigned char signal_voltage); 159298269c6SHu Ziji }; 160298269c6SHu Ziji 16106c8b667SHu Ziji static struct xenon_emmc_phy_regs xenon_emmc_5_0_phy_regs = { 16206c8b667SHu Ziji .timing_adj = XENON_EMMC_5_0_PHY_TIMING_ADJUST, 16306c8b667SHu Ziji .func_ctrl = XENON_EMMC_5_0_PHY_FUNC_CONTROL, 16406c8b667SHu Ziji .pad_ctrl = XENON_EMMC_5_0_PHY_PAD_CONTROL, 16506c8b667SHu Ziji .pad_ctrl2 = XENON_EMMC_5_0_PHY_PAD_CONTROL2, 16606c8b667SHu Ziji .dll_ctrl = XENON_EMMC_5_0_PHY_DLL_CONTROL, 16706c8b667SHu Ziji .logic_timing_adj = XENON_EMMC_5_0_PHY_LOGIC_TIMING_ADJUST, 16806c8b667SHu Ziji .dll_update = XENON_DLL_UPDATE_STROBE_5_0, 169a04b9b47SHu Ziji .logic_timing_val = XENON_EMMC_5_0_PHY_LOGIC_TIMING_VALUE, 17006c8b667SHu Ziji }; 17106c8b667SHu Ziji 17206c8b667SHu Ziji static struct xenon_emmc_phy_regs xenon_emmc_5_1_phy_regs = { 17306c8b667SHu Ziji .timing_adj = XENON_EMMC_PHY_TIMING_ADJUST, 17406c8b667SHu Ziji .func_ctrl = XENON_EMMC_PHY_FUNC_CONTROL, 17506c8b667SHu Ziji .pad_ctrl = XENON_EMMC_PHY_PAD_CONTROL, 17606c8b667SHu Ziji .pad_ctrl2 = XENON_EMMC_PHY_PAD_CONTROL2, 17706c8b667SHu Ziji .dll_ctrl = XENON_EMMC_PHY_DLL_CONTROL, 17806c8b667SHu Ziji .logic_timing_adj = XENON_EMMC_PHY_LOGIC_TIMING_ADJUST, 17906c8b667SHu Ziji .dll_update = XENON_DLL_UPDATE, 180a04b9b47SHu Ziji .logic_timing_val = XENON_LOGIC_TIMING_VALUE, 18106c8b667SHu Ziji }; 18206c8b667SHu Ziji 18306c8b667SHu Ziji /* 18406c8b667SHu Ziji * eMMC PHY configuration and operations 18506c8b667SHu Ziji */ 18606c8b667SHu Ziji struct xenon_emmc_phy_params { 18706c8b667SHu Ziji bool slow_mode; 18806c8b667SHu Ziji 18906c8b667SHu Ziji u8 znr; 19006c8b667SHu Ziji u8 zpr; 19106c8b667SHu Ziji 19206c8b667SHu Ziji /* Nr of consecutive Sampling Points of a Valid Sampling Window */ 19306c8b667SHu Ziji u8 nr_tun_times; 19406c8b667SHu Ziji /* Divider for calculating Tuning Step */ 19506c8b667SHu Ziji u8 tun_step_divider; 196298269c6SHu Ziji 197298269c6SHu Ziji struct soc_pad_ctrl pad_ctrl; 19806c8b667SHu Ziji }; 19906c8b667SHu Ziji 20006c8b667SHu Ziji static int xenon_alloc_emmc_phy(struct sdhci_host *host) 20106c8b667SHu Ziji { 20206c8b667SHu Ziji struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 20306c8b667SHu Ziji struct xenon_priv *priv = sdhci_pltfm_priv(pltfm_host); 20406c8b667SHu Ziji struct xenon_emmc_phy_params *params; 20506c8b667SHu Ziji 20606c8b667SHu Ziji params = devm_kzalloc(mmc_dev(host->mmc), sizeof(*params), GFP_KERNEL); 20706c8b667SHu Ziji if (!params) 20806c8b667SHu Ziji return -ENOMEM; 20906c8b667SHu Ziji 21006c8b667SHu Ziji priv->phy_params = params; 21106c8b667SHu Ziji if (priv->phy_type == EMMC_5_0_PHY) 21206c8b667SHu Ziji priv->emmc_phy_regs = &xenon_emmc_5_0_phy_regs; 21306c8b667SHu Ziji else 21406c8b667SHu Ziji priv->emmc_phy_regs = &xenon_emmc_5_1_phy_regs; 21506c8b667SHu Ziji 21606c8b667SHu Ziji return 0; 21706c8b667SHu Ziji } 21806c8b667SHu Ziji 21906c8b667SHu Ziji /* 22006c8b667SHu Ziji * eMMC 5.0/5.1 PHY init/re-init. 22106c8b667SHu Ziji * eMMC PHY init should be executed after: 22206c8b667SHu Ziji * 1. SDCLK frequency changes. 22306c8b667SHu Ziji * 2. SDCLK is stopped and re-enabled. 22406c8b667SHu Ziji * 3. config in emmc_phy_regs->timing_adj and emmc_phy_regs->func_ctrl 22506c8b667SHu Ziji * are changed 22606c8b667SHu Ziji */ 22706c8b667SHu Ziji static int xenon_emmc_phy_init(struct sdhci_host *host) 22806c8b667SHu Ziji { 22906c8b667SHu Ziji u32 reg; 23006c8b667SHu Ziji u32 wait, clock; 23106c8b667SHu Ziji struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 23206c8b667SHu Ziji struct xenon_priv *priv = sdhci_pltfm_priv(pltfm_host); 23306c8b667SHu Ziji struct xenon_emmc_phy_regs *phy_regs = priv->emmc_phy_regs; 23406c8b667SHu Ziji 23506c8b667SHu Ziji reg = sdhci_readl(host, phy_regs->timing_adj); 23606c8b667SHu Ziji reg |= XENON_PHY_INITIALIZAION; 23706c8b667SHu Ziji sdhci_writel(host, reg, phy_regs->timing_adj); 23806c8b667SHu Ziji 23906c8b667SHu Ziji /* Add duration of FC_SYNC_RST */ 24006c8b667SHu Ziji wait = ((reg >> XENON_FC_SYNC_RST_DURATION_SHIFT) & 24106c8b667SHu Ziji XENON_FC_SYNC_RST_DURATION_MASK); 24206c8b667SHu Ziji /* Add interval between FC_SYNC_EN and FC_SYNC_RST */ 24306c8b667SHu Ziji wait += ((reg >> XENON_FC_SYNC_RST_EN_DURATION_SHIFT) & 24406c8b667SHu Ziji XENON_FC_SYNC_RST_EN_DURATION_MASK); 24506c8b667SHu Ziji /* Add duration of asserting FC_SYNC_EN */ 24606c8b667SHu Ziji wait += ((reg >> XENON_FC_SYNC_EN_DURATION_SHIFT) & 24706c8b667SHu Ziji XENON_FC_SYNC_EN_DURATION_MASK); 24806c8b667SHu Ziji /* Add duration of waiting for PHY */ 24906c8b667SHu Ziji wait += ((reg >> XENON_WAIT_CYCLE_BEFORE_USING_SHIFT) & 25006c8b667SHu Ziji XENON_WAIT_CYCLE_BEFORE_USING_MASK); 25106c8b667SHu Ziji /* 4 additional bus clock and 4 AXI bus clock are required */ 25206c8b667SHu Ziji wait += 8; 25306c8b667SHu Ziji wait <<= 20; 25406c8b667SHu Ziji 25506c8b667SHu Ziji clock = host->clock; 25606c8b667SHu Ziji if (!clock) 25706c8b667SHu Ziji /* Use the possibly slowest bus frequency value */ 25806c8b667SHu Ziji clock = XENON_LOWEST_SDCLK_FREQ; 25906c8b667SHu Ziji /* get the wait time */ 26006c8b667SHu Ziji wait /= clock; 26106c8b667SHu Ziji wait++; 26206c8b667SHu Ziji /* wait for host eMMC PHY init completes */ 26306c8b667SHu Ziji udelay(wait); 26406c8b667SHu Ziji 26506c8b667SHu Ziji reg = sdhci_readl(host, phy_regs->timing_adj); 26606c8b667SHu Ziji reg &= XENON_PHY_INITIALIZAION; 26706c8b667SHu Ziji if (reg) { 26806c8b667SHu Ziji dev_err(mmc_dev(host->mmc), "eMMC PHY init cannot complete after %d us\n", 26906c8b667SHu Ziji wait); 27006c8b667SHu Ziji return -ETIMEDOUT; 27106c8b667SHu Ziji } 27206c8b667SHu Ziji 27306c8b667SHu Ziji return 0; 27406c8b667SHu Ziji } 27506c8b667SHu Ziji 276298269c6SHu Ziji #define ARMADA_3700_SOC_PAD_1_8V 0x1 277298269c6SHu Ziji #define ARMADA_3700_SOC_PAD_3_3V 0x0 278298269c6SHu Ziji 279298269c6SHu Ziji static void armada_3700_soc_pad_voltage_set(struct sdhci_host *host, 280298269c6SHu Ziji unsigned char signal_voltage) 281298269c6SHu Ziji { 282298269c6SHu Ziji struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 283298269c6SHu Ziji struct xenon_priv *priv = sdhci_pltfm_priv(pltfm_host); 284298269c6SHu Ziji struct xenon_emmc_phy_params *params = priv->phy_params; 285298269c6SHu Ziji 286298269c6SHu Ziji if (params->pad_ctrl.pad_type == SOC_PAD_FIXED_1_8V) { 287298269c6SHu Ziji writel(ARMADA_3700_SOC_PAD_1_8V, params->pad_ctrl.reg); 288298269c6SHu Ziji } else if (params->pad_ctrl.pad_type == SOC_PAD_SD) { 289298269c6SHu Ziji if (signal_voltage == MMC_SIGNAL_VOLTAGE_180) 290298269c6SHu Ziji writel(ARMADA_3700_SOC_PAD_1_8V, params->pad_ctrl.reg); 291298269c6SHu Ziji else if (signal_voltage == MMC_SIGNAL_VOLTAGE_330) 292298269c6SHu Ziji writel(ARMADA_3700_SOC_PAD_3_3V, params->pad_ctrl.reg); 293298269c6SHu Ziji } 294298269c6SHu Ziji } 295298269c6SHu Ziji 296298269c6SHu Ziji /* 297298269c6SHu Ziji * Set SoC PHY voltage PAD control register, 298298269c6SHu Ziji * according to the operation voltage on PAD. 299298269c6SHu Ziji * The detailed operation depends on SoC implementation. 300298269c6SHu Ziji */ 301298269c6SHu Ziji static void xenon_emmc_phy_set_soc_pad(struct sdhci_host *host, 302298269c6SHu Ziji unsigned char signal_voltage) 303298269c6SHu Ziji { 304298269c6SHu Ziji struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 305298269c6SHu Ziji struct xenon_priv *priv = sdhci_pltfm_priv(pltfm_host); 306298269c6SHu Ziji struct xenon_emmc_phy_params *params = priv->phy_params; 307298269c6SHu Ziji 308298269c6SHu Ziji if (!params->pad_ctrl.reg) 309298269c6SHu Ziji return; 310298269c6SHu Ziji 311298269c6SHu Ziji if (params->pad_ctrl.set_soc_pad) 312298269c6SHu Ziji params->pad_ctrl.set_soc_pad(host, signal_voltage); 313298269c6SHu Ziji } 314298269c6SHu Ziji 31506c8b667SHu Ziji /* 31606c8b667SHu Ziji * Enable eMMC PHY HW DLL 31706c8b667SHu Ziji * DLL should be enabled and stable before HS200/SDR104 tuning, 31806c8b667SHu Ziji * and before HS400 data strobe setting. 31906c8b667SHu Ziji */ 32006c8b667SHu Ziji static int xenon_emmc_phy_enable_dll(struct sdhci_host *host) 32106c8b667SHu Ziji { 32206c8b667SHu Ziji u32 reg; 32306c8b667SHu Ziji struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 32406c8b667SHu Ziji struct xenon_priv *priv = sdhci_pltfm_priv(pltfm_host); 32506c8b667SHu Ziji struct xenon_emmc_phy_regs *phy_regs = priv->emmc_phy_regs; 32606c8b667SHu Ziji ktime_t timeout; 32706c8b667SHu Ziji 32806c8b667SHu Ziji if (WARN_ON(host->clock <= MMC_HIGH_52_MAX_DTR)) 32906c8b667SHu Ziji return -EINVAL; 33006c8b667SHu Ziji 33106c8b667SHu Ziji reg = sdhci_readl(host, phy_regs->dll_ctrl); 33206c8b667SHu Ziji if (reg & XENON_DLL_ENABLE) 33306c8b667SHu Ziji return 0; 33406c8b667SHu Ziji 33506c8b667SHu Ziji /* Enable DLL */ 33606c8b667SHu Ziji reg = sdhci_readl(host, phy_regs->dll_ctrl); 33706c8b667SHu Ziji reg |= (XENON_DLL_ENABLE | XENON_DLL_FAST_LOCK); 33806c8b667SHu Ziji 33906c8b667SHu Ziji /* 34006c8b667SHu Ziji * Set Phase as 90 degree, which is most common value. 34106c8b667SHu Ziji * Might set another value if necessary. 34206c8b667SHu Ziji * The granularity is 1 degree. 34306c8b667SHu Ziji */ 34406c8b667SHu Ziji reg &= ~((XENON_DLL_PHASE_MASK << XENON_DLL_PHSEL0_SHIFT) | 34506c8b667SHu Ziji (XENON_DLL_PHASE_MASK << XENON_DLL_PHSEL1_SHIFT)); 34606c8b667SHu Ziji reg |= ((XENON_DLL_PHASE_90_DEGREE << XENON_DLL_PHSEL0_SHIFT) | 34706c8b667SHu Ziji (XENON_DLL_PHASE_90_DEGREE << XENON_DLL_PHSEL1_SHIFT)); 34806c8b667SHu Ziji 34906c8b667SHu Ziji reg &= ~XENON_DLL_BYPASS_EN; 35006c8b667SHu Ziji reg |= phy_regs->dll_update; 35106c8b667SHu Ziji if (priv->phy_type == EMMC_5_1_PHY) 35206c8b667SHu Ziji reg &= ~XENON_DLL_REFCLK_SEL; 35306c8b667SHu Ziji sdhci_writel(host, reg, phy_regs->dll_ctrl); 35406c8b667SHu Ziji 35506c8b667SHu Ziji /* Wait max 32 ms */ 35606c8b667SHu Ziji timeout = ktime_add_ms(ktime_get(), 32); 3570e6e7c2fSAdrian Hunter while (1) { 3580e6e7c2fSAdrian Hunter bool timedout = ktime_after(ktime_get(), timeout); 3590e6e7c2fSAdrian Hunter 3600e6e7c2fSAdrian Hunter if (sdhci_readw(host, XENON_SLOT_EXT_PRESENT_STATE) & 3610e6e7c2fSAdrian Hunter XENON_DLL_LOCK_STATE) 3620e6e7c2fSAdrian Hunter break; 3630e6e7c2fSAdrian Hunter if (timedout) { 36406c8b667SHu Ziji dev_err(mmc_dev(host->mmc), "Wait for DLL Lock time-out\n"); 36506c8b667SHu Ziji return -ETIMEDOUT; 36606c8b667SHu Ziji } 36706c8b667SHu Ziji udelay(100); 36806c8b667SHu Ziji } 36906c8b667SHu Ziji return 0; 37006c8b667SHu Ziji } 37106c8b667SHu Ziji 37206c8b667SHu Ziji /* 37306c8b667SHu Ziji * Config to eMMC PHY to prepare for tuning. 37406c8b667SHu Ziji * Enable HW DLL and set the TUNING_STEP 37506c8b667SHu Ziji */ 37606c8b667SHu Ziji static int xenon_emmc_phy_config_tuning(struct sdhci_host *host) 37706c8b667SHu Ziji { 37806c8b667SHu Ziji struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 37906c8b667SHu Ziji struct xenon_priv *priv = sdhci_pltfm_priv(pltfm_host); 38006c8b667SHu Ziji struct xenon_emmc_phy_params *params = priv->phy_params; 38106c8b667SHu Ziji u32 reg, tuning_step; 38206c8b667SHu Ziji int ret; 38306c8b667SHu Ziji 38406c8b667SHu Ziji if (host->clock <= MMC_HIGH_52_MAX_DTR) 38506c8b667SHu Ziji return -EINVAL; 38606c8b667SHu Ziji 38706c8b667SHu Ziji ret = xenon_emmc_phy_enable_dll(host); 38806c8b667SHu Ziji if (ret) 38906c8b667SHu Ziji return ret; 39006c8b667SHu Ziji 39106c8b667SHu Ziji /* Achieve TUNING_STEP with HW DLL help */ 39206c8b667SHu Ziji reg = sdhci_readl(host, XENON_SLOT_DLL_CUR_DLY_VAL); 39306c8b667SHu Ziji tuning_step = reg / params->tun_step_divider; 39406c8b667SHu Ziji if (unlikely(tuning_step > XENON_TUNING_STEP_MASK)) { 39506c8b667SHu Ziji dev_warn(mmc_dev(host->mmc), 39606c8b667SHu Ziji "HS200 TUNING_STEP %d is larger than MAX value\n", 39706c8b667SHu Ziji tuning_step); 39806c8b667SHu Ziji tuning_step = XENON_TUNING_STEP_MASK; 39906c8b667SHu Ziji } 40006c8b667SHu Ziji 40106c8b667SHu Ziji /* Set TUNING_STEP for later tuning */ 40206c8b667SHu Ziji reg = sdhci_readl(host, XENON_SLOT_OP_STATUS_CTRL); 40306c8b667SHu Ziji reg &= ~(XENON_TUN_CONSECUTIVE_TIMES_MASK << 40406c8b667SHu Ziji XENON_TUN_CONSECUTIVE_TIMES_SHIFT); 40506c8b667SHu Ziji reg |= (params->nr_tun_times << XENON_TUN_CONSECUTIVE_TIMES_SHIFT); 40606c8b667SHu Ziji reg &= ~(XENON_TUNING_STEP_MASK << XENON_TUNING_STEP_SHIFT); 40706c8b667SHu Ziji reg |= (tuning_step << XENON_TUNING_STEP_SHIFT); 40806c8b667SHu Ziji sdhci_writel(host, reg, XENON_SLOT_OP_STATUS_CTRL); 40906c8b667SHu Ziji 41006c8b667SHu Ziji return 0; 41106c8b667SHu Ziji } 41206c8b667SHu Ziji 413aab6e25aSHu Ziji static void xenon_emmc_phy_disable_strobe(struct sdhci_host *host) 41406c8b667SHu Ziji { 415aab6e25aSHu Ziji struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 416aab6e25aSHu Ziji struct xenon_priv *priv = sdhci_pltfm_priv(pltfm_host); 41706c8b667SHu Ziji u32 reg; 41806c8b667SHu Ziji 419aab6e25aSHu Ziji /* Disable both SDHC Data Strobe and Enhanced Strobe */ 42006c8b667SHu Ziji reg = sdhci_readl(host, XENON_SLOT_EMMC_CTRL); 421aab6e25aSHu Ziji reg &= ~(XENON_ENABLE_DATA_STROBE | XENON_ENABLE_RESP_STROBE); 42206c8b667SHu Ziji sdhci_writel(host, reg, XENON_SLOT_EMMC_CTRL); 423aab6e25aSHu Ziji 424aab6e25aSHu Ziji /* Clear Strobe line Pull down or Pull up */ 425aab6e25aSHu Ziji if (priv->phy_type == EMMC_5_0_PHY) { 426aab6e25aSHu Ziji reg = sdhci_readl(host, XENON_EMMC_5_0_PHY_PAD_CONTROL); 427aab6e25aSHu Ziji reg &= ~(XENON_EMMC5_FC_QSP_PD | XENON_EMMC5_FC_QSP_PU); 428aab6e25aSHu Ziji sdhci_writel(host, reg, XENON_EMMC_5_0_PHY_PAD_CONTROL); 429aab6e25aSHu Ziji } else { 430aab6e25aSHu Ziji reg = sdhci_readl(host, XENON_EMMC_PHY_PAD_CONTROL1); 431aab6e25aSHu Ziji reg &= ~(XENON_EMMC5_1_FC_QSP_PD | XENON_EMMC5_1_FC_QSP_PU); 432aab6e25aSHu Ziji sdhci_writel(host, reg, XENON_EMMC_PHY_PAD_CONTROL1); 433aab6e25aSHu Ziji } 43406c8b667SHu Ziji } 43506c8b667SHu Ziji 436aab6e25aSHu Ziji /* Set HS400 Data Strobe and Enhanced Strobe */ 43706c8b667SHu Ziji static void xenon_emmc_phy_strobe_delay_adj(struct sdhci_host *host) 43806c8b667SHu Ziji { 43906c8b667SHu Ziji struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 44006c8b667SHu Ziji struct xenon_priv *priv = sdhci_pltfm_priv(pltfm_host); 44106c8b667SHu Ziji u32 reg; 44206c8b667SHu Ziji 44306c8b667SHu Ziji if (WARN_ON(host->timing != MMC_TIMING_MMC_HS400)) 44406c8b667SHu Ziji return; 44506c8b667SHu Ziji 44606c8b667SHu Ziji if (host->clock <= MMC_HIGH_52_MAX_DTR) 44706c8b667SHu Ziji return; 44806c8b667SHu Ziji 44906c8b667SHu Ziji dev_dbg(mmc_dev(host->mmc), "starts HS400 strobe delay adjustment\n"); 45006c8b667SHu Ziji 45106c8b667SHu Ziji xenon_emmc_phy_enable_dll(host); 45206c8b667SHu Ziji 45306c8b667SHu Ziji /* Enable SDHC Data Strobe */ 45406c8b667SHu Ziji reg = sdhci_readl(host, XENON_SLOT_EMMC_CTRL); 45506c8b667SHu Ziji reg |= XENON_ENABLE_DATA_STROBE; 456aab6e25aSHu Ziji /* 457aab6e25aSHu Ziji * Enable SDHC Enhanced Strobe if supported 458aab6e25aSHu Ziji * Xenon Enhanced Strobe should be enabled only when 459aab6e25aSHu Ziji * 1. card is in HS400 mode and 460aab6e25aSHu Ziji * 2. SDCLK is higher than 52MHz 461aab6e25aSHu Ziji * 3. DLL is enabled 462aab6e25aSHu Ziji */ 463aab6e25aSHu Ziji if (host->mmc->ios.enhanced_strobe) 464aab6e25aSHu Ziji reg |= XENON_ENABLE_RESP_STROBE; 46506c8b667SHu Ziji sdhci_writel(host, reg, XENON_SLOT_EMMC_CTRL); 46606c8b667SHu Ziji 46706c8b667SHu Ziji /* Set Data Strobe Pull down */ 46806c8b667SHu Ziji if (priv->phy_type == EMMC_5_0_PHY) { 46906c8b667SHu Ziji reg = sdhci_readl(host, XENON_EMMC_5_0_PHY_PAD_CONTROL); 47006c8b667SHu Ziji reg |= XENON_EMMC5_FC_QSP_PD; 47106c8b667SHu Ziji reg &= ~XENON_EMMC5_FC_QSP_PU; 47206c8b667SHu Ziji sdhci_writel(host, reg, XENON_EMMC_5_0_PHY_PAD_CONTROL); 47306c8b667SHu Ziji } else { 47406c8b667SHu Ziji reg = sdhci_readl(host, XENON_EMMC_PHY_PAD_CONTROL1); 47506c8b667SHu Ziji reg |= XENON_EMMC5_1_FC_QSP_PD; 47606c8b667SHu Ziji reg &= ~XENON_EMMC5_1_FC_QSP_PU; 47706c8b667SHu Ziji sdhci_writel(host, reg, XENON_EMMC_PHY_PAD_CONTROL1); 47806c8b667SHu Ziji } 47906c8b667SHu Ziji } 48006c8b667SHu Ziji 48106c8b667SHu Ziji /* 48206c8b667SHu Ziji * If eMMC PHY Slow Mode is required in lower speed mode (SDCLK < 55MHz) 48306c8b667SHu Ziji * in SDR mode, enable Slow Mode to bypass eMMC PHY. 48406c8b667SHu Ziji * SDIO slower SDR mode also requires Slow Mode. 48506c8b667SHu Ziji * 48606c8b667SHu Ziji * If Slow Mode is enabled, return true. 48706c8b667SHu Ziji * Otherwise, return false. 48806c8b667SHu Ziji */ 48906c8b667SHu Ziji static bool xenon_emmc_phy_slow_mode(struct sdhci_host *host, 49006c8b667SHu Ziji unsigned char timing) 49106c8b667SHu Ziji { 49206c8b667SHu Ziji struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 49306c8b667SHu Ziji struct xenon_priv *priv = sdhci_pltfm_priv(pltfm_host); 49406c8b667SHu Ziji struct xenon_emmc_phy_params *params = priv->phy_params; 49506c8b667SHu Ziji struct xenon_emmc_phy_regs *phy_regs = priv->emmc_phy_regs; 49606c8b667SHu Ziji u32 reg; 49706c8b667SHu Ziji int ret; 49806c8b667SHu Ziji 49906c8b667SHu Ziji if (host->clock > MMC_HIGH_52_MAX_DTR) 50006c8b667SHu Ziji return false; 50106c8b667SHu Ziji 50206c8b667SHu Ziji reg = sdhci_readl(host, phy_regs->timing_adj); 50306c8b667SHu Ziji /* When in slower SDR mode, enable Slow Mode for SDIO 50406c8b667SHu Ziji * or when Slow Mode flag is set 50506c8b667SHu Ziji */ 50606c8b667SHu Ziji switch (timing) { 50706c8b667SHu Ziji case MMC_TIMING_LEGACY: 50806c8b667SHu Ziji /* 50906c8b667SHu Ziji * If Slow Mode is required, enable Slow Mode by default 51006c8b667SHu Ziji * in early init phase to avoid any potential issue. 51106c8b667SHu Ziji */ 51206c8b667SHu Ziji if (params->slow_mode) { 51306c8b667SHu Ziji reg |= XENON_TIMING_ADJUST_SLOW_MODE; 51406c8b667SHu Ziji ret = true; 51506c8b667SHu Ziji } else { 51606c8b667SHu Ziji reg &= ~XENON_TIMING_ADJUST_SLOW_MODE; 51706c8b667SHu Ziji ret = false; 51806c8b667SHu Ziji } 51906c8b667SHu Ziji break; 52006c8b667SHu Ziji case MMC_TIMING_UHS_SDR25: 52106c8b667SHu Ziji case MMC_TIMING_UHS_SDR12: 52206c8b667SHu Ziji case MMC_TIMING_SD_HS: 52306c8b667SHu Ziji case MMC_TIMING_MMC_HS: 52406c8b667SHu Ziji if ((priv->init_card_type == MMC_TYPE_SDIO) || 52506c8b667SHu Ziji params->slow_mode) { 52606c8b667SHu Ziji reg |= XENON_TIMING_ADJUST_SLOW_MODE; 52706c8b667SHu Ziji ret = true; 52806c8b667SHu Ziji break; 52906c8b667SHu Ziji } 530df561f66SGustavo A. R. Silva fallthrough; 53106c8b667SHu Ziji default: 53206c8b667SHu Ziji reg &= ~XENON_TIMING_ADJUST_SLOW_MODE; 53306c8b667SHu Ziji ret = false; 53406c8b667SHu Ziji } 53506c8b667SHu Ziji 53606c8b667SHu Ziji sdhci_writel(host, reg, phy_regs->timing_adj); 53706c8b667SHu Ziji return ret; 53806c8b667SHu Ziji } 53906c8b667SHu Ziji 54006c8b667SHu Ziji /* 54106c8b667SHu Ziji * Set-up eMMC 5.0/5.1 PHY. 54206c8b667SHu Ziji * Specific configuration depends on the current speed mode in use. 54306c8b667SHu Ziji */ 54406c8b667SHu Ziji static void xenon_emmc_phy_set(struct sdhci_host *host, 54506c8b667SHu Ziji unsigned char timing) 54606c8b667SHu Ziji { 54706c8b667SHu Ziji u32 reg; 54806c8b667SHu Ziji struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 54906c8b667SHu Ziji struct xenon_priv *priv = sdhci_pltfm_priv(pltfm_host); 55006c8b667SHu Ziji struct xenon_emmc_phy_params *params = priv->phy_params; 55106c8b667SHu Ziji struct xenon_emmc_phy_regs *phy_regs = priv->emmc_phy_regs; 55206c8b667SHu Ziji 55306c8b667SHu Ziji dev_dbg(mmc_dev(host->mmc), "eMMC PHY setting starts\n"); 55406c8b667SHu Ziji 55506c8b667SHu Ziji /* Setup pad, set bit[28] and bits[26:24] */ 55606c8b667SHu Ziji reg = sdhci_readl(host, phy_regs->pad_ctrl); 55706c8b667SHu Ziji reg |= (XENON_FC_DQ_RECEN | XENON_FC_CMD_RECEN | 55806c8b667SHu Ziji XENON_FC_QSP_RECEN | XENON_OEN_QSN); 55906c8b667SHu Ziji /* All FC_XX_RECEIVCE should be set as CMOS Type */ 56006c8b667SHu Ziji reg |= XENON_FC_ALL_CMOS_RECEIVER; 56106c8b667SHu Ziji sdhci_writel(host, reg, phy_regs->pad_ctrl); 56206c8b667SHu Ziji 56306c8b667SHu Ziji /* Set CMD and DQ Pull Up */ 56406c8b667SHu Ziji if (priv->phy_type == EMMC_5_0_PHY) { 56506c8b667SHu Ziji reg = sdhci_readl(host, XENON_EMMC_5_0_PHY_PAD_CONTROL); 56606c8b667SHu Ziji reg |= (XENON_EMMC5_FC_CMD_PU | XENON_EMMC5_FC_DQ_PU); 56706c8b667SHu Ziji reg &= ~(XENON_EMMC5_FC_CMD_PD | XENON_EMMC5_FC_DQ_PD); 56806c8b667SHu Ziji sdhci_writel(host, reg, XENON_EMMC_5_0_PHY_PAD_CONTROL); 56906c8b667SHu Ziji } else { 57006c8b667SHu Ziji reg = sdhci_readl(host, XENON_EMMC_PHY_PAD_CONTROL1); 57106c8b667SHu Ziji reg |= (XENON_EMMC5_1_FC_CMD_PU | XENON_EMMC5_1_FC_DQ_PU); 57206c8b667SHu Ziji reg &= ~(XENON_EMMC5_1_FC_CMD_PD | XENON_EMMC5_1_FC_DQ_PD); 57306c8b667SHu Ziji sdhci_writel(host, reg, XENON_EMMC_PHY_PAD_CONTROL1); 57406c8b667SHu Ziji } 57506c8b667SHu Ziji 57606c8b667SHu Ziji if (timing == MMC_TIMING_LEGACY) { 57706c8b667SHu Ziji xenon_emmc_phy_slow_mode(host, timing); 57806c8b667SHu Ziji goto phy_init; 57906c8b667SHu Ziji } 58006c8b667SHu Ziji 58106c8b667SHu Ziji /* 58206c8b667SHu Ziji * If SDIO card, set SDIO Mode 58306c8b667SHu Ziji * Otherwise, clear SDIO Mode 58406c8b667SHu Ziji */ 58506c8b667SHu Ziji reg = sdhci_readl(host, phy_regs->timing_adj); 58606c8b667SHu Ziji if (priv->init_card_type == MMC_TYPE_SDIO) 58706c8b667SHu Ziji reg |= XENON_TIMING_ADJUST_SDIO_MODE; 58806c8b667SHu Ziji else 58906c8b667SHu Ziji reg &= ~XENON_TIMING_ADJUST_SDIO_MODE; 59006c8b667SHu Ziji sdhci_writel(host, reg, phy_regs->timing_adj); 59106c8b667SHu Ziji 59206c8b667SHu Ziji if (xenon_emmc_phy_slow_mode(host, timing)) 59306c8b667SHu Ziji goto phy_init; 59406c8b667SHu Ziji 59506c8b667SHu Ziji /* 59606c8b667SHu Ziji * Set preferred ZNR and ZPR value 59706c8b667SHu Ziji * The ZNR and ZPR value vary between different boards. 59806c8b667SHu Ziji * Define them both in sdhci-xenon-emmc-phy.h. 59906c8b667SHu Ziji */ 60006c8b667SHu Ziji reg = sdhci_readl(host, phy_regs->pad_ctrl2); 60106c8b667SHu Ziji reg &= ~((XENON_ZNR_MASK << XENON_ZNR_SHIFT) | XENON_ZPR_MASK); 60206c8b667SHu Ziji reg |= ((params->znr << XENON_ZNR_SHIFT) | params->zpr); 60306c8b667SHu Ziji sdhci_writel(host, reg, phy_regs->pad_ctrl2); 60406c8b667SHu Ziji 60506c8b667SHu Ziji /* 60606c8b667SHu Ziji * When setting EMMC_PHY_FUNC_CONTROL register, 60706c8b667SHu Ziji * SD clock should be disabled 60806c8b667SHu Ziji */ 60906c8b667SHu Ziji reg = sdhci_readl(host, SDHCI_CLOCK_CONTROL); 61006c8b667SHu Ziji reg &= ~SDHCI_CLOCK_CARD_EN; 61106c8b667SHu Ziji sdhci_writew(host, reg, SDHCI_CLOCK_CONTROL); 61206c8b667SHu Ziji 61306c8b667SHu Ziji reg = sdhci_readl(host, phy_regs->func_ctrl); 61406c8b667SHu Ziji switch (timing) { 61506c8b667SHu Ziji case MMC_TIMING_MMC_HS400: 61606c8b667SHu Ziji reg |= (XENON_DQ_DDR_MODE_MASK << XENON_DQ_DDR_MODE_SHIFT) | 61706c8b667SHu Ziji XENON_CMD_DDR_MODE; 61806c8b667SHu Ziji reg &= ~XENON_DQ_ASYNC_MODE; 61906c8b667SHu Ziji break; 62006c8b667SHu Ziji case MMC_TIMING_UHS_DDR50: 62106c8b667SHu Ziji case MMC_TIMING_MMC_DDR52: 62206c8b667SHu Ziji reg |= (XENON_DQ_DDR_MODE_MASK << XENON_DQ_DDR_MODE_SHIFT) | 62306c8b667SHu Ziji XENON_CMD_DDR_MODE | XENON_DQ_ASYNC_MODE; 62406c8b667SHu Ziji break; 62506c8b667SHu Ziji default: 62606c8b667SHu Ziji reg &= ~((XENON_DQ_DDR_MODE_MASK << XENON_DQ_DDR_MODE_SHIFT) | 62706c8b667SHu Ziji XENON_CMD_DDR_MODE); 62806c8b667SHu Ziji reg |= XENON_DQ_ASYNC_MODE; 62906c8b667SHu Ziji } 63006c8b667SHu Ziji sdhci_writel(host, reg, phy_regs->func_ctrl); 63106c8b667SHu Ziji 63206c8b667SHu Ziji /* Enable bus clock */ 63306c8b667SHu Ziji reg = sdhci_readl(host, SDHCI_CLOCK_CONTROL); 63406c8b667SHu Ziji reg |= SDHCI_CLOCK_CARD_EN; 63506c8b667SHu Ziji sdhci_writew(host, reg, SDHCI_CLOCK_CONTROL); 63606c8b667SHu Ziji 63706c8b667SHu Ziji if (timing == MMC_TIMING_MMC_HS400) 63806c8b667SHu Ziji /* Hardware team recommend a value for HS400 */ 639a04b9b47SHu Ziji sdhci_writel(host, phy_regs->logic_timing_val, 64006c8b667SHu Ziji phy_regs->logic_timing_adj); 64106c8b667SHu Ziji else 642aab6e25aSHu Ziji xenon_emmc_phy_disable_strobe(host); 64306c8b667SHu Ziji 64406c8b667SHu Ziji phy_init: 64506c8b667SHu Ziji xenon_emmc_phy_init(host); 64606c8b667SHu Ziji 64706c8b667SHu Ziji dev_dbg(mmc_dev(host->mmc), "eMMC PHY setting completes\n"); 64806c8b667SHu Ziji } 64906c8b667SHu Ziji 650298269c6SHu Ziji static int get_dt_pad_ctrl_data(struct sdhci_host *host, 651298269c6SHu Ziji struct device_node *np, 652298269c6SHu Ziji struct xenon_emmc_phy_params *params) 653298269c6SHu Ziji { 654f75fda37SMarcin Wojtas struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 655f75fda37SMarcin Wojtas struct xenon_priv *priv = sdhci_pltfm_priv(pltfm_host); 656298269c6SHu Ziji int ret = 0; 657298269c6SHu Ziji const char *name; 658298269c6SHu Ziji struct resource iomem; 659298269c6SHu Ziji 660f75fda37SMarcin Wojtas if (priv->hw_version == XENON_A3700) 661298269c6SHu Ziji params->pad_ctrl.set_soc_pad = armada_3700_soc_pad_voltage_set; 662298269c6SHu Ziji else 663298269c6SHu Ziji return 0; 664298269c6SHu Ziji 665298269c6SHu Ziji if (of_address_to_resource(np, 1, &iomem)) { 6661ff537bdSRob Herring dev_err(mmc_dev(host->mmc), "Unable to find SoC PAD ctrl register address for %pOFn\n", 6671ff537bdSRob Herring np); 668298269c6SHu Ziji return -EINVAL; 669298269c6SHu Ziji } 670298269c6SHu Ziji 671298269c6SHu Ziji params->pad_ctrl.reg = devm_ioremap_resource(mmc_dev(host->mmc), 672298269c6SHu Ziji &iomem); 673e6e267b0SWei Yongjun if (IS_ERR(params->pad_ctrl.reg)) 674298269c6SHu Ziji return PTR_ERR(params->pad_ctrl.reg); 675298269c6SHu Ziji 676298269c6SHu Ziji ret = of_property_read_string(np, "marvell,pad-type", &name); 677298269c6SHu Ziji if (ret) { 678298269c6SHu Ziji dev_err(mmc_dev(host->mmc), "Unable to determine SoC PHY PAD ctrl type\n"); 679298269c6SHu Ziji return ret; 680298269c6SHu Ziji } 681298269c6SHu Ziji if (!strcmp(name, "sd")) { 682298269c6SHu Ziji params->pad_ctrl.pad_type = SOC_PAD_SD; 683298269c6SHu Ziji } else if (!strcmp(name, "fixed-1-8v")) { 684298269c6SHu Ziji params->pad_ctrl.pad_type = SOC_PAD_FIXED_1_8V; 685298269c6SHu Ziji } else { 686298269c6SHu Ziji dev_err(mmc_dev(host->mmc), "Unsupported SoC PHY PAD ctrl type %s\n", 687298269c6SHu Ziji name); 688298269c6SHu Ziji return -EINVAL; 689298269c6SHu Ziji } 690298269c6SHu Ziji 691298269c6SHu Ziji return ret; 692298269c6SHu Ziji } 693298269c6SHu Ziji 694*f29bf660SMarcin Wojtas static int xenon_emmc_phy_parse_params(struct sdhci_host *host, 695*f29bf660SMarcin Wojtas struct device *dev, 69606c8b667SHu Ziji struct xenon_emmc_phy_params *params) 69706c8b667SHu Ziji { 69806c8b667SHu Ziji u32 value; 69906c8b667SHu Ziji 70006c8b667SHu Ziji params->slow_mode = false; 701*f29bf660SMarcin Wojtas if (device_property_read_bool(dev, "marvell,xenon-phy-slow-mode")) 70206c8b667SHu Ziji params->slow_mode = true; 70306c8b667SHu Ziji 70406c8b667SHu Ziji params->znr = XENON_ZNR_DEF_VALUE; 705*f29bf660SMarcin Wojtas if (!device_property_read_u32(dev, "marvell,xenon-phy-znr", &value)) 70606c8b667SHu Ziji params->znr = value & XENON_ZNR_MASK; 70706c8b667SHu Ziji 70806c8b667SHu Ziji params->zpr = XENON_ZPR_DEF_VALUE; 709*f29bf660SMarcin Wojtas if (!device_property_read_u32(dev, "marvell,xenon-phy-zpr", &value)) 71006c8b667SHu Ziji params->zpr = value & XENON_ZPR_MASK; 71106c8b667SHu Ziji 71206c8b667SHu Ziji params->nr_tun_times = XENON_TUN_CONSECUTIVE_TIMES; 713*f29bf660SMarcin Wojtas if (!device_property_read_u32(dev, "marvell,xenon-phy-nr-success-tun", 71406c8b667SHu Ziji &value)) 71506c8b667SHu Ziji params->nr_tun_times = value & XENON_TUN_CONSECUTIVE_TIMES_MASK; 71606c8b667SHu Ziji 71706c8b667SHu Ziji params->tun_step_divider = XENON_TUNING_STEP_DIVIDER; 718*f29bf660SMarcin Wojtas if (!device_property_read_u32(dev, "marvell,xenon-phy-tun-step-divider", 71906c8b667SHu Ziji &value)) 72006c8b667SHu Ziji params->tun_step_divider = value & 0xFF; 72106c8b667SHu Ziji 722*f29bf660SMarcin Wojtas if (dev->of_node) 723*f29bf660SMarcin Wojtas return get_dt_pad_ctrl_data(host, dev->of_node, params); 724*f29bf660SMarcin Wojtas return 0; 725298269c6SHu Ziji } 726298269c6SHu Ziji 727298269c6SHu Ziji /* Set SoC PHY Voltage PAD */ 728298269c6SHu Ziji void xenon_soc_pad_ctrl(struct sdhci_host *host, 729298269c6SHu Ziji unsigned char signal_voltage) 730298269c6SHu Ziji { 731298269c6SHu Ziji xenon_emmc_phy_set_soc_pad(host, signal_voltage); 73206c8b667SHu Ziji } 73306c8b667SHu Ziji 73406c8b667SHu Ziji /* 73506c8b667SHu Ziji * Setting PHY when card is working in High Speed Mode. 736aab6e25aSHu Ziji * HS400 set Data Strobe and Enhanced Strobe if it is supported. 73706c8b667SHu Ziji * HS200/SDR104 set tuning config to prepare for tuning. 73806c8b667SHu Ziji */ 73906c8b667SHu Ziji static int xenon_hs_delay_adj(struct sdhci_host *host) 74006c8b667SHu Ziji { 74106c8b667SHu Ziji int ret = 0; 74206c8b667SHu Ziji 74306c8b667SHu Ziji if (WARN_ON(host->clock <= XENON_DEFAULT_SDCLK_FREQ)) 74406c8b667SHu Ziji return -EINVAL; 74506c8b667SHu Ziji 74606c8b667SHu Ziji switch (host->timing) { 74706c8b667SHu Ziji case MMC_TIMING_MMC_HS400: 74806c8b667SHu Ziji xenon_emmc_phy_strobe_delay_adj(host); 74906c8b667SHu Ziji return 0; 75006c8b667SHu Ziji case MMC_TIMING_MMC_HS200: 75106c8b667SHu Ziji case MMC_TIMING_UHS_SDR104: 75206c8b667SHu Ziji return xenon_emmc_phy_config_tuning(host); 75306c8b667SHu Ziji case MMC_TIMING_MMC_DDR52: 75406c8b667SHu Ziji case MMC_TIMING_UHS_DDR50: 75506c8b667SHu Ziji /* 75606c8b667SHu Ziji * DDR Mode requires driver to scan Sampling Fixed Delay Line, 75706c8b667SHu Ziji * to find out a perfect operation sampling point. 75806c8b667SHu Ziji * It is hard to implement such a scan in host driver 75906c8b667SHu Ziji * since initiating commands by host driver is not safe. 76006c8b667SHu Ziji * Thus so far just keep PHY Sampling Fixed Delay in 76106c8b667SHu Ziji * default value of DDR mode. 76206c8b667SHu Ziji * 76306c8b667SHu Ziji * If any timing issue occurs in DDR mode on Marvell products, 76406c8b667SHu Ziji * please contact maintainer for internal support in Marvell. 76506c8b667SHu Ziji */ 76606c8b667SHu Ziji dev_warn_once(mmc_dev(host->mmc), "Timing issue might occur in DDR mode\n"); 76706c8b667SHu Ziji return 0; 76806c8b667SHu Ziji } 76906c8b667SHu Ziji 77006c8b667SHu Ziji return ret; 77106c8b667SHu Ziji } 77206c8b667SHu Ziji 77306c8b667SHu Ziji /* 77406c8b667SHu Ziji * Adjust PHY setting. 77506c8b667SHu Ziji * PHY setting should be adjusted when SDCLK frequency, Bus Width 77606c8b667SHu Ziji * or Speed Mode is changed. 77706c8b667SHu Ziji * Additional config are required when card is working in High Speed mode, 77806c8b667SHu Ziji * after leaving Legacy Mode. 77906c8b667SHu Ziji */ 78006c8b667SHu Ziji int xenon_phy_adj(struct sdhci_host *host, struct mmc_ios *ios) 78106c8b667SHu Ziji { 78206c8b667SHu Ziji struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 78306c8b667SHu Ziji struct xenon_priv *priv = sdhci_pltfm_priv(pltfm_host); 78406c8b667SHu Ziji int ret = 0; 78506c8b667SHu Ziji 78606c8b667SHu Ziji if (!host->clock) { 78706c8b667SHu Ziji priv->clock = 0; 78806c8b667SHu Ziji return 0; 78906c8b667SHu Ziji } 79006c8b667SHu Ziji 79106c8b667SHu Ziji /* 79206c8b667SHu Ziji * The timing, frequency or bus width is changed, 79306c8b667SHu Ziji * better to set eMMC PHY based on current setting 79406c8b667SHu Ziji * and adjust Xenon SDHC delay. 79506c8b667SHu Ziji */ 79606c8b667SHu Ziji if ((host->clock == priv->clock) && 79706c8b667SHu Ziji (ios->bus_width == priv->bus_width) && 79806c8b667SHu Ziji (ios->timing == priv->timing)) 79906c8b667SHu Ziji return 0; 80006c8b667SHu Ziji 80106c8b667SHu Ziji xenon_emmc_phy_set(host, ios->timing); 80206c8b667SHu Ziji 80306c8b667SHu Ziji /* Update the record */ 80406c8b667SHu Ziji priv->bus_width = ios->bus_width; 80506c8b667SHu Ziji 80606c8b667SHu Ziji priv->timing = ios->timing; 80706c8b667SHu Ziji priv->clock = host->clock; 80806c8b667SHu Ziji 80906c8b667SHu Ziji /* Legacy mode is a special case */ 81006c8b667SHu Ziji if (ios->timing == MMC_TIMING_LEGACY) 81106c8b667SHu Ziji return 0; 81206c8b667SHu Ziji 81306c8b667SHu Ziji if (host->clock > XENON_DEFAULT_SDCLK_FREQ) 81406c8b667SHu Ziji ret = xenon_hs_delay_adj(host); 81506c8b667SHu Ziji return ret; 81606c8b667SHu Ziji } 81706c8b667SHu Ziji 818*f29bf660SMarcin Wojtas static int xenon_add_phy(struct device *dev, struct sdhci_host *host, 81906c8b667SHu Ziji const char *phy_name) 82006c8b667SHu Ziji { 82106c8b667SHu Ziji struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 82206c8b667SHu Ziji struct xenon_priv *priv = sdhci_pltfm_priv(pltfm_host); 823e1cb88adSXie Yisheng int ret; 82406c8b667SHu Ziji 825e1cb88adSXie Yisheng priv->phy_type = match_string(phy_types, NR_PHY_TYPES, phy_name); 826e1cb88adSXie Yisheng if (priv->phy_type < 0) { 82706c8b667SHu Ziji dev_err(mmc_dev(host->mmc), 82806c8b667SHu Ziji "Unable to determine PHY name %s. Use default eMMC 5.1 PHY\n", 82906c8b667SHu Ziji phy_name); 83006c8b667SHu Ziji priv->phy_type = EMMC_5_1_PHY; 83106c8b667SHu Ziji } 83206c8b667SHu Ziji 83306c8b667SHu Ziji ret = xenon_alloc_emmc_phy(host); 83406c8b667SHu Ziji if (ret) 83506c8b667SHu Ziji return ret; 83606c8b667SHu Ziji 837*f29bf660SMarcin Wojtas return xenon_emmc_phy_parse_params(host, dev, priv->phy_params); 83806c8b667SHu Ziji } 83906c8b667SHu Ziji 840*f29bf660SMarcin Wojtas int xenon_phy_parse_params(struct device *dev, struct sdhci_host *host) 84106c8b667SHu Ziji { 84206c8b667SHu Ziji const char *phy_type = NULL; 84306c8b667SHu Ziji 844*f29bf660SMarcin Wojtas if (!device_property_read_string(dev, "marvell,xenon-phy-type", &phy_type)) 845*f29bf660SMarcin Wojtas return xenon_add_phy(dev, host, phy_type); 84606c8b667SHu Ziji 847*f29bf660SMarcin Wojtas return xenon_add_phy(dev, host, "emmc 5.1 phy"); 84806c8b667SHu Ziji } 849