// SPDX-License-Identifier: GPL-2.0-only /** * SDHCI Controller driver for TI's OMAP SoCs * * Copyright (C) 2017 Texas Instruments * Author: Kishon Vijay Abraham I */ #include #include #include #include #include #include #include #include #include #include #include #include "sdhci-pltfm.h" #define SDHCI_OMAP_CON 0x12c #define CON_DW8 BIT(5) #define CON_DMA_MASTER BIT(20) #define CON_DDR BIT(19) #define CON_CLKEXTFREE BIT(16) #define CON_PADEN BIT(15) #define CON_CTPL BIT(11) #define CON_INIT BIT(1) #define CON_OD BIT(0) #define SDHCI_OMAP_DLL 0x0134 #define DLL_SWT BIT(20) #define DLL_FORCE_SR_C_SHIFT 13 #define DLL_FORCE_SR_C_MASK (0x7f << DLL_FORCE_SR_C_SHIFT) #define DLL_FORCE_VALUE BIT(12) #define DLL_CALIB BIT(1) #define SDHCI_OMAP_CMD 0x20c #define SDHCI_OMAP_PSTATE 0x0224 #define PSTATE_DLEV_DAT0 BIT(20) #define PSTATE_DATI BIT(1) #define SDHCI_OMAP_HCTL 0x228 #define HCTL_SDBP BIT(8) #define HCTL_SDVS_SHIFT 9 #define HCTL_SDVS_MASK (0x7 << HCTL_SDVS_SHIFT) #define HCTL_SDVS_33 (0x7 << HCTL_SDVS_SHIFT) #define HCTL_SDVS_30 (0x6 << HCTL_SDVS_SHIFT) #define HCTL_SDVS_18 (0x5 << HCTL_SDVS_SHIFT) #define SDHCI_OMAP_SYSCTL 0x22c #define SYSCTL_CEN BIT(2) #define SYSCTL_CLKD_SHIFT 6 #define SYSCTL_CLKD_MASK 0x3ff #define SDHCI_OMAP_STAT 0x230 #define SDHCI_OMAP_IE 0x234 #define INT_CC_EN BIT(0) #define SDHCI_OMAP_AC12 0x23c #define AC12_V1V8_SIGEN BIT(19) #define AC12_SCLK_SEL BIT(23) #define SDHCI_OMAP_CAPA 0x240 #define CAPA_VS33 BIT(24) #define CAPA_VS30 BIT(25) #define CAPA_VS18 BIT(26) #define SDHCI_OMAP_CAPA2 0x0244 #define CAPA2_TSDR50 BIT(13) #define SDHCI_OMAP_TIMEOUT 1 /* 1 msec */ #define SYSCTL_CLKD_MAX 0x3FF #define IOV_1V8 1800000 /* 180000 uV */ #define IOV_3V0 3000000 /* 300000 uV */ #define IOV_3V3 3300000 /* 330000 uV */ #define MAX_PHASE_DELAY 0x7C /* sdhci-omap controller flags */ #define SDHCI_OMAP_REQUIRE_IODELAY BIT(0) struct sdhci_omap_data { u32 offset; u8 flags; }; struct sdhci_omap_host { char *version; void __iomem *base; struct device *dev; struct regulator *pbias; bool pbias_enabled; struct sdhci_host *host; u8 bus_mode; u8 power_mode; u8 timing; u8 flags; struct pinctrl *pinctrl; struct pinctrl_state **pinctrl_state; bool is_tuning; }; static void sdhci_omap_start_clock(struct sdhci_omap_host *omap_host); static void sdhci_omap_stop_clock(struct sdhci_omap_host *omap_host); static inline u32 sdhci_omap_readl(struct sdhci_omap_host *host, unsigned int offset) { return readl(host->base + offset); } static inline void sdhci_omap_writel(struct sdhci_omap_host *host, unsigned int offset, u32 data) { writel(data, host->base + offset); } static int sdhci_omap_set_pbias(struct sdhci_omap_host *omap_host, bool power_on, unsigned int iov) { int ret; struct device *dev = omap_host->dev; if (IS_ERR(omap_host->pbias)) return 0; if (power_on) { ret = regulator_set_voltage(omap_host->pbias, iov, iov); if (ret) { dev_err(dev, "pbias set voltage failed\n"); return ret; } if (omap_host->pbias_enabled) return 0; ret = regulator_enable(omap_host->pbias); if (ret) { dev_err(dev, "pbias reg enable fail\n"); return ret; } omap_host->pbias_enabled = true; } else { if (!omap_host->pbias_enabled) return 0; ret = regulator_disable(omap_host->pbias); if (ret) { dev_err(dev, "pbias reg disable fail\n"); return ret; } omap_host->pbias_enabled = false; } return 0; } static int sdhci_omap_enable_iov(struct sdhci_omap_host *omap_host, unsigned int iov) { int ret; struct sdhci_host *host = omap_host->host; struct mmc_host *mmc = host->mmc; ret = sdhci_omap_set_pbias(omap_host, false, 0); if (ret) return ret; if (!IS_ERR(mmc->supply.vqmmc)) { ret = regulator_set_voltage(mmc->supply.vqmmc, iov, iov); if (ret) { dev_err(mmc_dev(mmc), "vqmmc set voltage failed\n"); return ret; } } ret = sdhci_omap_set_pbias(omap_host, true, iov); if (ret) return ret; return 0; } static void sdhci_omap_conf_bus_power(struct sdhci_omap_host *omap_host, unsigned char signal_voltage) { u32 reg; ktime_t timeout; reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_HCTL); reg &= ~HCTL_SDVS_MASK; if (signal_voltage == MMC_SIGNAL_VOLTAGE_330) reg |= HCTL_SDVS_33; else reg |= HCTL_SDVS_18; sdhci_omap_writel(omap_host, SDHCI_OMAP_HCTL, reg); reg |= HCTL_SDBP; sdhci_omap_writel(omap_host, SDHCI_OMAP_HCTL, reg); /* wait 1ms */ timeout = ktime_add_ms(ktime_get(), SDHCI_OMAP_TIMEOUT); while (1) { bool timedout = ktime_after(ktime_get(), timeout); if (sdhci_omap_readl(omap_host, SDHCI_OMAP_HCTL) & HCTL_SDBP) break; if (WARN_ON(timedout)) return; usleep_range(5, 10); } } static void sdhci_omap_enable_sdio_irq(struct mmc_host *mmc, int enable) { struct sdhci_host *host = mmc_priv(mmc); struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); struct sdhci_omap_host *omap_host = sdhci_pltfm_priv(pltfm_host); u32 reg; reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CON); if (enable) reg |= (CON_CTPL | CON_CLKEXTFREE); else reg &= ~(CON_CTPL | CON_CLKEXTFREE); sdhci_omap_writel(omap_host, SDHCI_OMAP_CON, reg); sdhci_enable_sdio_irq(mmc, enable); } static inline void sdhci_omap_set_dll(struct sdhci_omap_host *omap_host, int count) { int i; u32 reg; reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_DLL); reg |= DLL_FORCE_VALUE; reg &= ~DLL_FORCE_SR_C_MASK; reg |= (count << DLL_FORCE_SR_C_SHIFT); sdhci_omap_writel(omap_host, SDHCI_OMAP_DLL, reg); reg |= DLL_CALIB; sdhci_omap_writel(omap_host, SDHCI_OMAP_DLL, reg); for (i = 0; i < 1000; i++) { reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_DLL); if (reg & DLL_CALIB) break; } reg &= ~DLL_CALIB; sdhci_omap_writel(omap_host, SDHCI_OMAP_DLL, reg); } static void sdhci_omap_disable_tuning(struct sdhci_omap_host *omap_host) { u32 reg; reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_AC12); reg &= ~AC12_SCLK_SEL; sdhci_omap_writel(omap_host, SDHCI_OMAP_AC12, reg); reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_DLL); reg &= ~(DLL_FORCE_VALUE | DLL_SWT); sdhci_omap_writel(omap_host, SDHCI_OMAP_DLL, reg); } static int sdhci_omap_execute_tuning(struct mmc_host *mmc, u32 opcode) { struct sdhci_host *host = mmc_priv(mmc); struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); struct sdhci_omap_host *omap_host = sdhci_pltfm_priv(pltfm_host); struct thermal_zone_device *thermal_dev; struct device *dev = omap_host->dev; struct mmc_ios *ios = &mmc->ios; u32 start_window = 0, max_window = 0; bool single_point_failure = false; bool dcrc_was_enabled = false; u8 cur_match, prev_match = 0; u32 length = 0, max_len = 0; u32 phase_delay = 0; int temperature; int ret = 0; u32 reg; int i; /* clock tuning is not needed for upto 52MHz */ if (ios->clock <= 52000000) return 0; reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CAPA2); if (ios->timing == MMC_TIMING_UHS_SDR50 && !(reg & CAPA2_TSDR50)) return 0; thermal_dev = thermal_zone_get_zone_by_name("cpu_thermal"); if (IS_ERR(thermal_dev)) { dev_err(dev, "Unable to get thermal zone for tuning\n"); return PTR_ERR(thermal_dev); } ret = thermal_zone_get_temp(thermal_dev, &temperature); if (ret) return ret; reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_DLL); reg |= DLL_SWT; sdhci_omap_writel(omap_host, SDHCI_OMAP_DLL, reg); /* * OMAP5/DRA74X/DRA72x Errata i802: * DCRC error interrupts (MMCHS_STAT[21] DCRC=0x1) can occur * during the tuning procedure. So disable it during the * tuning procedure. */ if (host->ier & SDHCI_INT_DATA_CRC) { host->ier &= ~SDHCI_INT_DATA_CRC; dcrc_was_enabled = true; } omap_host->is_tuning = true; /* * Stage 1: Search for a maximum pass window ignoring any * any single point failures. If the tuning value ends up * near it, move away from it in stage 2 below */ while (phase_delay <= MAX_PHASE_DELAY) { sdhci_omap_set_dll(omap_host, phase_delay); cur_match = !mmc_send_tuning(mmc, opcode, NULL); if (cur_match) { if (prev_match) { length++; } else if (single_point_failure) { /* ignore single point failure */ length++; } else { start_window = phase_delay; length = 1; } } else { single_point_failure = prev_match; } if (length > max_len) { max_window = start_window; max_len = length; } prev_match = cur_match; phase_delay += 4; } if (!max_len) { dev_err(dev, "Unable to find match\n"); ret = -EIO; goto tuning_error; } /* * Assign tuning value as a ratio of maximum pass window based * on temperature */ if (temperature < -20000) phase_delay = min(max_window + 4 * (max_len - 1) - 24, max_window + DIV_ROUND_UP(13 * max_len, 16) * 4); else if (temperature < 20000) phase_delay = max_window + DIV_ROUND_UP(9 * max_len, 16) * 4; else if (temperature < 40000) phase_delay = max_window + DIV_ROUND_UP(8 * max_len, 16) * 4; else if (temperature < 70000) phase_delay = max_window + DIV_ROUND_UP(7 * max_len, 16) * 4; else if (temperature < 90000) phase_delay = max_window + DIV_ROUND_UP(5 * max_len, 16) * 4; else if (temperature < 120000) phase_delay = max_window + DIV_ROUND_UP(4 * max_len, 16) * 4; else phase_delay = max_window + DIV_ROUND_UP(3 * max_len, 16) * 4; /* * Stage 2: Search for a single point failure near the chosen tuning * value in two steps. First in the +3 to +10 range and then in the * +2 to -10 range. If found, move away from it in the appropriate * direction by the appropriate amount depending on the temperature. */ for (i = 3; i <= 10; i++) { sdhci_omap_set_dll(omap_host, phase_delay + i); if (mmc_send_tuning(mmc, opcode, NULL)) { if (temperature < 10000) phase_delay += i + 6; else if (temperature < 20000) phase_delay += i - 12; else if (temperature < 70000) phase_delay += i - 8; else phase_delay += i - 6; goto single_failure_found; } } for (i = 2; i >= -10; i--) { sdhci_omap_set_dll(omap_host, phase_delay + i); if (mmc_send_tuning(mmc, opcode, NULL)) { if (temperature < 10000) phase_delay += i + 12; else if (temperature < 20000) phase_delay += i + 8; else if (temperature < 70000) phase_delay += i + 8; else if (temperature < 90000) phase_delay += i + 10; else phase_delay += i + 12; goto single_failure_found; } } single_failure_found: reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_AC12); if (!(reg & AC12_SCLK_SEL)) { ret = -EIO; goto tuning_error; } sdhci_omap_set_dll(omap_host, phase_delay); omap_host->is_tuning = false; goto ret; tuning_error: omap_host->is_tuning = false; dev_err(dev, "Tuning failed\n"); sdhci_omap_disable_tuning(omap_host); ret: sdhci_reset(host, SDHCI_RESET_CMD | SDHCI_RESET_DATA); /* Reenable forbidden interrupt */ if (dcrc_was_enabled) host->ier |= SDHCI_INT_DATA_CRC; sdhci_writel(host, host->ier, SDHCI_INT_ENABLE); sdhci_writel(host, host->ier, SDHCI_SIGNAL_ENABLE); return ret; } static int sdhci_omap_card_busy(struct mmc_host *mmc) { u32 reg, ac12; int ret = false; struct sdhci_host *host = mmc_priv(mmc); struct sdhci_pltfm_host *pltfm_host; struct sdhci_omap_host *omap_host; u32 ier = host->ier; pltfm_host = sdhci_priv(host); omap_host = sdhci_pltfm_priv(pltfm_host); reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CON); ac12 = sdhci_omap_readl(omap_host, SDHCI_OMAP_AC12); reg &= ~CON_CLKEXTFREE; if (ac12 & AC12_V1V8_SIGEN) reg |= CON_CLKEXTFREE; reg |= CON_PADEN; sdhci_omap_writel(omap_host, SDHCI_OMAP_CON, reg); disable_irq(host->irq); ier |= SDHCI_INT_CARD_INT; sdhci_writel(host, ier, SDHCI_INT_ENABLE); sdhci_writel(host, ier, SDHCI_SIGNAL_ENABLE); /* * Delay is required for PSTATE to correctly reflect * DLEV/CLEV values after PADEN is set. */ usleep_range(50, 100); reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_PSTATE); if ((reg & PSTATE_DATI) || !(reg & PSTATE_DLEV_DAT0)) ret = true; reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CON); reg &= ~(CON_CLKEXTFREE | CON_PADEN); sdhci_omap_writel(omap_host, SDHCI_OMAP_CON, reg); sdhci_writel(host, host->ier, SDHCI_INT_ENABLE); sdhci_writel(host, host->ier, SDHCI_SIGNAL_ENABLE); enable_irq(host->irq); return ret; } static int sdhci_omap_start_signal_voltage_switch(struct mmc_host *mmc, struct mmc_ios *ios) { u32 reg; int ret; unsigned int iov; struct sdhci_host *host = mmc_priv(mmc); struct sdhci_pltfm_host *pltfm_host; struct sdhci_omap_host *omap_host; struct device *dev; pltfm_host = sdhci_priv(host); omap_host = sdhci_pltfm_priv(pltfm_host); dev = omap_host->dev; if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_330) { reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CAPA); if (!(reg & CAPA_VS33)) return -EOPNOTSUPP; sdhci_omap_conf_bus_power(omap_host, ios->signal_voltage); reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_AC12); reg &= ~AC12_V1V8_SIGEN; sdhci_omap_writel(omap_host, SDHCI_OMAP_AC12, reg); iov = IOV_3V3; } else if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_180) { reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CAPA); if (!(reg & CAPA_VS18)) return -EOPNOTSUPP; sdhci_omap_conf_bus_power(omap_host, ios->signal_voltage); reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_AC12); reg |= AC12_V1V8_SIGEN; sdhci_omap_writel(omap_host, SDHCI_OMAP_AC12, reg); iov = IOV_1V8; } else { return -EOPNOTSUPP; } ret = sdhci_omap_enable_iov(omap_host, iov); if (ret) { dev_err(dev, "failed to switch IO voltage to %dmV\n", iov); return ret; } dev_dbg(dev, "IO voltage switched to %dmV\n", iov); return 0; } static void sdhci_omap_set_timing(struct sdhci_omap_host *omap_host, u8 timing) { int ret; struct pinctrl_state *pinctrl_state; struct device *dev = omap_host->dev; if (!(omap_host->flags & SDHCI_OMAP_REQUIRE_IODELAY)) return; if (omap_host->timing == timing) return; sdhci_omap_stop_clock(omap_host); pinctrl_state = omap_host->pinctrl_state[timing]; ret = pinctrl_select_state(omap_host->pinctrl, pinctrl_state); if (ret) { dev_err(dev, "failed to select pinctrl state\n"); return; } sdhci_omap_start_clock(omap_host); omap_host->timing = timing; } static void sdhci_omap_set_power_mode(struct sdhci_omap_host *omap_host, u8 power_mode) { if (omap_host->bus_mode == MMC_POWER_OFF) sdhci_omap_disable_tuning(omap_host); omap_host->power_mode = power_mode; } static void sdhci_omap_set_bus_mode(struct sdhci_omap_host *omap_host, unsigned int mode) { u32 reg; if (omap_host->bus_mode == mode) return; reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CON); if (mode == MMC_BUSMODE_OPENDRAIN) reg |= CON_OD; else reg &= ~CON_OD; sdhci_omap_writel(omap_host, SDHCI_OMAP_CON, reg); omap_host->bus_mode = mode; } static void sdhci_omap_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) { struct sdhci_host *host = mmc_priv(mmc); struct sdhci_pltfm_host *pltfm_host; struct sdhci_omap_host *omap_host; pltfm_host = sdhci_priv(host); omap_host = sdhci_pltfm_priv(pltfm_host); sdhci_omap_set_bus_mode(omap_host, ios->bus_mode); sdhci_omap_set_timing(omap_host, ios->timing); sdhci_set_ios(mmc, ios); sdhci_omap_set_power_mode(omap_host, ios->power_mode); } static u16 sdhci_omap_calc_divisor(struct sdhci_pltfm_host *host, unsigned int clock) { u16 dsor; dsor = DIV_ROUND_UP(clk_get_rate(host->clk), clock); if (dsor > SYSCTL_CLKD_MAX) dsor = SYSCTL_CLKD_MAX; return dsor; } static void sdhci_omap_start_clock(struct sdhci_omap_host *omap_host) { u32 reg; reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_SYSCTL); reg |= SYSCTL_CEN; sdhci_omap_writel(omap_host, SDHCI_OMAP_SYSCTL, reg); } static void sdhci_omap_stop_clock(struct sdhci_omap_host *omap_host) { u32 reg; reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_SYSCTL); reg &= ~SYSCTL_CEN; sdhci_omap_writel(omap_host, SDHCI_OMAP_SYSCTL, reg); } static void sdhci_omap_set_clock(struct sdhci_host *host, unsigned int clock) { struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); struct sdhci_omap_host *omap_host = sdhci_pltfm_priv(pltfm_host); unsigned long clkdiv; sdhci_omap_stop_clock(omap_host); if (!clock) return; clkdiv = sdhci_omap_calc_divisor(pltfm_host, clock); clkdiv = (clkdiv & SYSCTL_CLKD_MASK) << SYSCTL_CLKD_SHIFT; sdhci_enable_clk(host, clkdiv); sdhci_omap_start_clock(omap_host); } static void sdhci_omap_set_power(struct sdhci_host *host, unsigned char mode, unsigned short vdd) { struct mmc_host *mmc = host->mmc; mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, vdd); } static int sdhci_omap_enable_dma(struct sdhci_host *host) { u32 reg; struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); struct sdhci_omap_host *omap_host = sdhci_pltfm_priv(pltfm_host); reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CON); reg |= CON_DMA_MASTER; sdhci_omap_writel(omap_host, SDHCI_OMAP_CON, reg); return 0; } static unsigned int sdhci_omap_get_min_clock(struct sdhci_host *host) { struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); return clk_get_rate(pltfm_host->clk) / SYSCTL_CLKD_MAX; } static void sdhci_omap_set_bus_width(struct sdhci_host *host, int width) { struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); struct sdhci_omap_host *omap_host = sdhci_pltfm_priv(pltfm_host); u32 reg; reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CON); if (width == MMC_BUS_WIDTH_8) reg |= CON_DW8; else reg &= ~CON_DW8; sdhci_omap_writel(omap_host, SDHCI_OMAP_CON, reg); sdhci_set_bus_width(host, width); } static void sdhci_omap_init_74_clocks(struct sdhci_host *host, u8 power_mode) { u32 reg; ktime_t timeout; struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); struct sdhci_omap_host *omap_host = sdhci_pltfm_priv(pltfm_host); if (omap_host->power_mode == power_mode) return; if (power_mode != MMC_POWER_ON) return; disable_irq(host->irq); reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CON); reg |= CON_INIT; sdhci_omap_writel(omap_host, SDHCI_OMAP_CON, reg); sdhci_omap_writel(omap_host, SDHCI_OMAP_CMD, 0x0); /* wait 1ms */ timeout = ktime_add_ms(ktime_get(), SDHCI_OMAP_TIMEOUT); while (1) { bool timedout = ktime_after(ktime_get(), timeout); if (sdhci_omap_readl(omap_host, SDHCI_OMAP_STAT) & INT_CC_EN) break; if (WARN_ON(timedout)) return; usleep_range(5, 10); } reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CON); reg &= ~CON_INIT; sdhci_omap_writel(omap_host, SDHCI_OMAP_CON, reg); sdhci_omap_writel(omap_host, SDHCI_OMAP_STAT, INT_CC_EN); enable_irq(host->irq); } static void sdhci_omap_set_uhs_signaling(struct sdhci_host *host, unsigned int timing) { u32 reg; struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); struct sdhci_omap_host *omap_host = sdhci_pltfm_priv(pltfm_host); sdhci_omap_stop_clock(omap_host); reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CON); if (timing == MMC_TIMING_UHS_DDR50 || timing == MMC_TIMING_MMC_DDR52) reg |= CON_DDR; else reg &= ~CON_DDR; sdhci_omap_writel(omap_host, SDHCI_OMAP_CON, reg); sdhci_set_uhs_signaling(host, timing); sdhci_omap_start_clock(omap_host); } static void sdhci_omap_reset(struct sdhci_host *host, u8 mask) { struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); struct sdhci_omap_host *omap_host = sdhci_pltfm_priv(pltfm_host); /* Don't reset data lines during tuning operation */ if (omap_host->is_tuning) mask &= ~SDHCI_RESET_DATA; sdhci_reset(host, mask); } #define CMD_ERR_MASK (SDHCI_INT_CRC | SDHCI_INT_END_BIT | SDHCI_INT_INDEX |\ SDHCI_INT_TIMEOUT) #define CMD_MASK (CMD_ERR_MASK | SDHCI_INT_RESPONSE) static u32 sdhci_omap_irq(struct sdhci_host *host, u32 intmask) { struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); struct sdhci_omap_host *omap_host = sdhci_pltfm_priv(pltfm_host); if (omap_host->is_tuning && host->cmd && !host->data_early && (intmask & CMD_ERR_MASK)) { /* * Since we are not resetting data lines during tuning * operation, data error or data complete interrupts * might still arrive. Mark this request as a failure * but still wait for the data interrupt */ if (intmask & SDHCI_INT_TIMEOUT) host->cmd->error = -ETIMEDOUT; else host->cmd->error = -EILSEQ; host->cmd = NULL; /* * Sometimes command error interrupts and command complete * interrupt will arrive together. Clear all command related * interrupts here. */ sdhci_writel(host, intmask & CMD_MASK, SDHCI_INT_STATUS); intmask &= ~CMD_MASK; } return intmask; } static struct sdhci_ops sdhci_omap_ops = { .set_clock = sdhci_omap_set_clock, .set_power = sdhci_omap_set_power, .enable_dma = sdhci_omap_enable_dma, .get_max_clock = sdhci_pltfm_clk_get_max_clock, .get_min_clock = sdhci_omap_get_min_clock, .set_bus_width = sdhci_omap_set_bus_width, .platform_send_init_74_clocks = sdhci_omap_init_74_clocks, .reset = sdhci_omap_reset, .set_uhs_signaling = sdhci_omap_set_uhs_signaling, .irq = sdhci_omap_irq, }; static int sdhci_omap_set_capabilities(struct sdhci_omap_host *omap_host) { u32 reg; int ret = 0; struct device *dev = omap_host->dev; struct regulator *vqmmc; vqmmc = regulator_get(dev, "vqmmc"); if (IS_ERR(vqmmc)) { ret = PTR_ERR(vqmmc); goto reg_put; } /* voltage capabilities might be set by boot loader, clear it */ reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CAPA); reg &= ~(CAPA_VS18 | CAPA_VS30 | CAPA_VS33); if (regulator_is_supported_voltage(vqmmc, IOV_3V3, IOV_3V3)) reg |= CAPA_VS33; if (regulator_is_supported_voltage(vqmmc, IOV_1V8, IOV_1V8)) reg |= CAPA_VS18; sdhci_omap_writel(omap_host, SDHCI_OMAP_CAPA, reg); reg_put: regulator_put(vqmmc); return ret; } static const struct sdhci_pltfm_data sdhci_omap_pdata = { .quirks = SDHCI_QUIRK_BROKEN_CARD_DETECTION | SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK | SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN | SDHCI_QUIRK_NO_HISPD_BIT | SDHCI_QUIRK_BROKEN_ADMA_ZEROLEN_DESC, .quirks2 = SDHCI_QUIRK2_ACMD23_BROKEN | SDHCI_QUIRK2_PRESET_VALUE_BROKEN | SDHCI_QUIRK2_RSP_136_HAS_CRC | SDHCI_QUIRK2_DISABLE_HW_TIMEOUT, .ops = &sdhci_omap_ops, }; static const struct sdhci_omap_data k2g_data = { .offset = 0x200, }; static const struct sdhci_omap_data dra7_data = { .offset = 0x200, .flags = SDHCI_OMAP_REQUIRE_IODELAY, }; static const struct of_device_id omap_sdhci_match[] = { { .compatible = "ti,dra7-sdhci", .data = &dra7_data }, { .compatible = "ti,k2g-sdhci", .data = &k2g_data }, {}, }; MODULE_DEVICE_TABLE(of, omap_sdhci_match); static struct pinctrl_state *sdhci_omap_iodelay_pinctrl_state(struct sdhci_omap_host *omap_host, char *mode, u32 *caps, u32 capmask) { struct device *dev = omap_host->dev; char *version = omap_host->version; struct pinctrl_state *pinctrl_state = ERR_PTR(-ENODEV); char str[20]; if (!(*caps & capmask)) goto ret; if (version) { snprintf(str, 20, "%s-%s", mode, version); pinctrl_state = pinctrl_lookup_state(omap_host->pinctrl, str); } if (IS_ERR(pinctrl_state)) pinctrl_state = pinctrl_lookup_state(omap_host->pinctrl, mode); if (IS_ERR(pinctrl_state)) { dev_err(dev, "no pinctrl state for %s mode", mode); *caps &= ~capmask; } ret: return pinctrl_state; } static int sdhci_omap_config_iodelay_pinctrl_state(struct sdhci_omap_host *omap_host) { struct device *dev = omap_host->dev; struct sdhci_host *host = omap_host->host; struct mmc_host *mmc = host->mmc; u32 *caps = &mmc->caps; u32 *caps2 = &mmc->caps2; struct pinctrl_state *state; struct pinctrl_state **pinctrl_state; if (!(omap_host->flags & SDHCI_OMAP_REQUIRE_IODELAY)) return 0; pinctrl_state = devm_kcalloc(dev, MMC_TIMING_MMC_HS200 + 1, sizeof(*pinctrl_state), GFP_KERNEL); if (!pinctrl_state) return -ENOMEM; omap_host->pinctrl = devm_pinctrl_get(omap_host->dev); if (IS_ERR(omap_host->pinctrl)) { dev_err(dev, "Cannot get pinctrl\n"); return PTR_ERR(omap_host->pinctrl); } state = pinctrl_lookup_state(omap_host->pinctrl, "default"); if (IS_ERR(state)) { dev_err(dev, "no pinctrl state for default mode\n"); return PTR_ERR(state); } pinctrl_state[MMC_TIMING_LEGACY] = state; state = sdhci_omap_iodelay_pinctrl_state(omap_host, "sdr104", caps, MMC_CAP_UHS_SDR104); if (!IS_ERR(state)) pinctrl_state[MMC_TIMING_UHS_SDR104] = state; state = sdhci_omap_iodelay_pinctrl_state(omap_host, "ddr50", caps, MMC_CAP_UHS_DDR50); if (!IS_ERR(state)) pinctrl_state[MMC_TIMING_UHS_DDR50] = state; state = sdhci_omap_iodelay_pinctrl_state(omap_host, "sdr50", caps, MMC_CAP_UHS_SDR50); if (!IS_ERR(state)) pinctrl_state[MMC_TIMING_UHS_SDR50] = state; state = sdhci_omap_iodelay_pinctrl_state(omap_host, "sdr25", caps, MMC_CAP_UHS_SDR25); if (!IS_ERR(state)) pinctrl_state[MMC_TIMING_UHS_SDR25] = state; state = sdhci_omap_iodelay_pinctrl_state(omap_host, "sdr12", caps, MMC_CAP_UHS_SDR12); if (!IS_ERR(state)) pinctrl_state[MMC_TIMING_UHS_SDR12] = state; state = sdhci_omap_iodelay_pinctrl_state(omap_host, "ddr_1_8v", caps, MMC_CAP_1_8V_DDR); if (!IS_ERR(state)) { pinctrl_state[MMC_TIMING_MMC_DDR52] = state; } else { state = sdhci_omap_iodelay_pinctrl_state(omap_host, "ddr_3_3v", caps, MMC_CAP_3_3V_DDR); if (!IS_ERR(state)) pinctrl_state[MMC_TIMING_MMC_DDR52] = state; } state = sdhci_omap_iodelay_pinctrl_state(omap_host, "hs", caps, MMC_CAP_SD_HIGHSPEED); if (!IS_ERR(state)) pinctrl_state[MMC_TIMING_SD_HS] = state; state = sdhci_omap_iodelay_pinctrl_state(omap_host, "hs", caps, MMC_CAP_MMC_HIGHSPEED); if (!IS_ERR(state)) pinctrl_state[MMC_TIMING_MMC_HS] = state; state = sdhci_omap_iodelay_pinctrl_state(omap_host, "hs200_1_8v", caps2, MMC_CAP2_HS200_1_8V_SDR); if (!IS_ERR(state)) pinctrl_state[MMC_TIMING_MMC_HS200] = state; omap_host->pinctrl_state = pinctrl_state; return 0; } static const struct soc_device_attribute sdhci_omap_soc_devices[] = { { .machine = "DRA7[45]*", .revision = "ES1.[01]", }, { /* sentinel */ } }; static int sdhci_omap_probe(struct platform_device *pdev) { int ret; u32 offset; struct device *dev = &pdev->dev; struct sdhci_host *host; struct sdhci_pltfm_host *pltfm_host; struct sdhci_omap_host *omap_host; struct mmc_host *mmc; const struct of_device_id *match; struct sdhci_omap_data *data; const struct soc_device_attribute *soc; match = of_match_device(omap_sdhci_match, dev); if (!match) return -EINVAL; data = (struct sdhci_omap_data *)match->data; if (!data) { dev_err(dev, "no sdhci omap data\n"); return -EINVAL; } offset = data->offset; host = sdhci_pltfm_init(pdev, &sdhci_omap_pdata, sizeof(*omap_host)); if (IS_ERR(host)) { dev_err(dev, "Failed sdhci_pltfm_init\n"); return PTR_ERR(host); } pltfm_host = sdhci_priv(host); omap_host = sdhci_pltfm_priv(pltfm_host); omap_host->host = host; omap_host->base = host->ioaddr; omap_host->dev = dev; omap_host->power_mode = MMC_POWER_UNDEFINED; omap_host->timing = MMC_TIMING_LEGACY; omap_host->flags = data->flags; host->ioaddr += offset; mmc = host->mmc; sdhci_get_of_property(pdev); ret = mmc_of_parse(mmc); if (ret) goto err_pltfm_free; soc = soc_device_match(sdhci_omap_soc_devices); if (soc) { omap_host->version = "rev11"; if (!strcmp(dev_name(dev), "4809c000.mmc")) mmc->f_max = 96000000; if (!strcmp(dev_name(dev), "480b4000.mmc")) mmc->f_max = 48000000; if (!strcmp(dev_name(dev), "480ad000.mmc")) mmc->f_max = 48000000; } if (!mmc_can_gpio_ro(mmc)) mmc->caps2 |= MMC_CAP2_NO_WRITE_PROTECT; pltfm_host->clk = devm_clk_get(dev, "fck"); if (IS_ERR(pltfm_host->clk)) { ret = PTR_ERR(pltfm_host->clk); goto err_pltfm_free; } ret = clk_set_rate(pltfm_host->clk, mmc->f_max); if (ret) { dev_err(dev, "failed to set clock to %d\n", mmc->f_max); goto err_pltfm_free; } omap_host->pbias = devm_regulator_get_optional(dev, "pbias"); if (IS_ERR(omap_host->pbias)) { ret = PTR_ERR(omap_host->pbias); if (ret != -ENODEV) goto err_pltfm_free; dev_dbg(dev, "unable to get pbias regulator %d\n", ret); } omap_host->pbias_enabled = false; /* * omap_device_pm_domain has callbacks to enable the main * functional clock, interface clock and also configure the * SYSCONFIG register of omap devices. The callback will be invoked * as part of pm_runtime_get_sync. */ pm_runtime_enable(dev); ret = pm_runtime_get_sync(dev); if (ret < 0) { dev_err(dev, "pm_runtime_get_sync failed\n"); pm_runtime_put_noidle(dev); goto err_rpm_disable; } ret = sdhci_omap_set_capabilities(omap_host); if (ret) { dev_err(dev, "failed to set system capabilities\n"); goto err_put_sync; } host->mmc_host_ops.start_signal_voltage_switch = sdhci_omap_start_signal_voltage_switch; host->mmc_host_ops.set_ios = sdhci_omap_set_ios; host->mmc_host_ops.card_busy = sdhci_omap_card_busy; host->mmc_host_ops.execute_tuning = sdhci_omap_execute_tuning; host->mmc_host_ops.enable_sdio_irq = sdhci_omap_enable_sdio_irq; ret = sdhci_setup_host(host); if (ret) goto err_put_sync; ret = sdhci_omap_config_iodelay_pinctrl_state(omap_host); if (ret) goto err_cleanup_host; ret = __sdhci_add_host(host); if (ret) goto err_cleanup_host; return 0; err_cleanup_host: sdhci_cleanup_host(host); err_put_sync: pm_runtime_put_sync(dev); err_rpm_disable: pm_runtime_disable(dev); err_pltfm_free: sdhci_pltfm_free(pdev); return ret; } static int sdhci_omap_remove(struct platform_device *pdev) { struct device *dev = &pdev->dev; struct sdhci_host *host = platform_get_drvdata(pdev); sdhci_remove_host(host, true); pm_runtime_put_sync(dev); pm_runtime_disable(dev); sdhci_pltfm_free(pdev); return 0; } static struct platform_driver sdhci_omap_driver = { .probe = sdhci_omap_probe, .remove = sdhci_omap_remove, .driver = { .name = "sdhci-omap", .of_match_table = omap_sdhci_match, }, }; module_platform_driver(sdhci_omap_driver); MODULE_DESCRIPTION("SDHCI driver for OMAP SoCs"); MODULE_AUTHOR("Texas Instruments Inc."); MODULE_LICENSE("GPL v2"); MODULE_ALIAS("platform:sdhci_omap");