16b1baefeSThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only 27d326930SKishon Vijay Abraham I /** 37d326930SKishon Vijay Abraham I * SDHCI Controller driver for TI's OMAP SoCs 47d326930SKishon Vijay Abraham I * 57d326930SKishon Vijay Abraham I * Copyright (C) 2017 Texas Instruments 67d326930SKishon Vijay Abraham I * Author: Kishon Vijay Abraham I <kishon@ti.com> 77d326930SKishon Vijay Abraham I */ 87d326930SKishon Vijay Abraham I 97d326930SKishon Vijay Abraham I #include <linux/delay.h> 105da5e494SFaiz Abbas #include <linux/mmc/mmc.h> 117d326930SKishon Vijay Abraham I #include <linux/mmc/slot-gpio.h> 127d326930SKishon Vijay Abraham I #include <linux/module.h> 137d326930SKishon Vijay Abraham I #include <linux/of.h> 147d326930SKishon Vijay Abraham I #include <linux/of_device.h> 157d326930SKishon Vijay Abraham I #include <linux/platform_device.h> 167d326930SKishon Vijay Abraham I #include <linux/pm_runtime.h> 177d326930SKishon Vijay Abraham I #include <linux/regulator/consumer.h> 188d20b2eaSKishon Vijay Abraham I #include <linux/pinctrl/consumer.h> 19212f4f8aSKishon Vijay Abraham I #include <linux/sys_soc.h> 20961de0a8SFaiz Abbas #include <linux/thermal.h> 217d326930SKishon Vijay Abraham I 227d326930SKishon Vijay Abraham I #include "sdhci-pltfm.h" 237d326930SKishon Vijay Abraham I 247d326930SKishon Vijay Abraham I #define SDHCI_OMAP_CON 0x12c 257d326930SKishon Vijay Abraham I #define CON_DW8 BIT(5) 267d326930SKishon Vijay Abraham I #define CON_DMA_MASTER BIT(20) 2727ceb7e0SKishon Vijay Abraham I #define CON_DDR BIT(19) 2820ea26a1SKishon Vijay Abraham I #define CON_CLKEXTFREE BIT(16) 2920ea26a1SKishon Vijay Abraham I #define CON_PADEN BIT(15) 30efde12b2SKishon Vijay Abraham I #define CON_CTPL BIT(11) 317d326930SKishon Vijay Abraham I #define CON_INIT BIT(1) 327d326930SKishon Vijay Abraham I #define CON_OD BIT(0) 337d326930SKishon Vijay Abraham I 349fc2cd76SKishon Vijay Abraham I #define SDHCI_OMAP_DLL 0x0134 359fc2cd76SKishon Vijay Abraham I #define DLL_SWT BIT(20) 369fc2cd76SKishon Vijay Abraham I #define DLL_FORCE_SR_C_SHIFT 13 379fc2cd76SKishon Vijay Abraham I #define DLL_FORCE_SR_C_MASK (0x7f << DLL_FORCE_SR_C_SHIFT) 389fc2cd76SKishon Vijay Abraham I #define DLL_FORCE_VALUE BIT(12) 399fc2cd76SKishon Vijay Abraham I #define DLL_CALIB BIT(1) 409fc2cd76SKishon Vijay Abraham I 417d326930SKishon Vijay Abraham I #define SDHCI_OMAP_CMD 0x20c 427d326930SKishon Vijay Abraham I 4320ea26a1SKishon Vijay Abraham I #define SDHCI_OMAP_PSTATE 0x0224 4420ea26a1SKishon Vijay Abraham I #define PSTATE_DLEV_DAT0 BIT(20) 4520ea26a1SKishon Vijay Abraham I #define PSTATE_DATI BIT(1) 4620ea26a1SKishon Vijay Abraham I 477d326930SKishon Vijay Abraham I #define SDHCI_OMAP_HCTL 0x228 487d326930SKishon Vijay Abraham I #define HCTL_SDBP BIT(8) 497d326930SKishon Vijay Abraham I #define HCTL_SDVS_SHIFT 9 507d326930SKishon Vijay Abraham I #define HCTL_SDVS_MASK (0x7 << HCTL_SDVS_SHIFT) 517d326930SKishon Vijay Abraham I #define HCTL_SDVS_33 (0x7 << HCTL_SDVS_SHIFT) 527d326930SKishon Vijay Abraham I #define HCTL_SDVS_30 (0x6 << HCTL_SDVS_SHIFT) 537d326930SKishon Vijay Abraham I #define HCTL_SDVS_18 (0x5 << HCTL_SDVS_SHIFT) 547d326930SKishon Vijay Abraham I 557d326930SKishon Vijay Abraham I #define SDHCI_OMAP_SYSCTL 0x22c 567d326930SKishon Vijay Abraham I #define SYSCTL_CEN BIT(2) 577d326930SKishon Vijay Abraham I #define SYSCTL_CLKD_SHIFT 6 587d326930SKishon Vijay Abraham I #define SYSCTL_CLKD_MASK 0x3ff 597d326930SKishon Vijay Abraham I 607d326930SKishon Vijay Abraham I #define SDHCI_OMAP_STAT 0x230 617d326930SKishon Vijay Abraham I 627d326930SKishon Vijay Abraham I #define SDHCI_OMAP_IE 0x234 637d326930SKishon Vijay Abraham I #define INT_CC_EN BIT(0) 647d326930SKishon Vijay Abraham I 657d326930SKishon Vijay Abraham I #define SDHCI_OMAP_AC12 0x23c 667d326930SKishon Vijay Abraham I #define AC12_V1V8_SIGEN BIT(19) 679fc2cd76SKishon Vijay Abraham I #define AC12_SCLK_SEL BIT(23) 687d326930SKishon Vijay Abraham I 697d326930SKishon Vijay Abraham I #define SDHCI_OMAP_CAPA 0x240 707d326930SKishon Vijay Abraham I #define CAPA_VS33 BIT(24) 717d326930SKishon Vijay Abraham I #define CAPA_VS30 BIT(25) 727d326930SKishon Vijay Abraham I #define CAPA_VS18 BIT(26) 737d326930SKishon Vijay Abraham I 749fc2cd76SKishon Vijay Abraham I #define SDHCI_OMAP_CAPA2 0x0244 759fc2cd76SKishon Vijay Abraham I #define CAPA2_TSDR50 BIT(13) 769fc2cd76SKishon Vijay Abraham I 777d326930SKishon Vijay Abraham I #define SDHCI_OMAP_TIMEOUT 1 /* 1 msec */ 787d326930SKishon Vijay Abraham I 797d326930SKishon Vijay Abraham I #define SYSCTL_CLKD_MAX 0x3FF 807d326930SKishon Vijay Abraham I 817d326930SKishon Vijay Abraham I #define IOV_1V8 1800000 /* 180000 uV */ 827d326930SKishon Vijay Abraham I #define IOV_3V0 3000000 /* 300000 uV */ 837d326930SKishon Vijay Abraham I #define IOV_3V3 3300000 /* 330000 uV */ 847d326930SKishon Vijay Abraham I 859fc2cd76SKishon Vijay Abraham I #define MAX_PHASE_DELAY 0x7C 869fc2cd76SKishon Vijay Abraham I 878d20b2eaSKishon Vijay Abraham I /* sdhci-omap controller flags */ 888d20b2eaSKishon Vijay Abraham I #define SDHCI_OMAP_REQUIRE_IODELAY BIT(0) 898d20b2eaSKishon Vijay Abraham I 907d326930SKishon Vijay Abraham I struct sdhci_omap_data { 917d326930SKishon Vijay Abraham I u32 offset; 928d20b2eaSKishon Vijay Abraham I u8 flags; 937d326930SKishon Vijay Abraham I }; 947d326930SKishon Vijay Abraham I 957d326930SKishon Vijay Abraham I struct sdhci_omap_host { 96212f4f8aSKishon Vijay Abraham I char *version; 977d326930SKishon Vijay Abraham I void __iomem *base; 987d326930SKishon Vijay Abraham I struct device *dev; 997d326930SKishon Vijay Abraham I struct regulator *pbias; 1007d326930SKishon Vijay Abraham I bool pbias_enabled; 1017d326930SKishon Vijay Abraham I struct sdhci_host *host; 1027d326930SKishon Vijay Abraham I u8 bus_mode; 1037d326930SKishon Vijay Abraham I u8 power_mode; 1048d20b2eaSKishon Vijay Abraham I u8 timing; 1058d20b2eaSKishon Vijay Abraham I u8 flags; 1068d20b2eaSKishon Vijay Abraham I 1078d20b2eaSKishon Vijay Abraham I struct pinctrl *pinctrl; 1088d20b2eaSKishon Vijay Abraham I struct pinctrl_state **pinctrl_state; 1095b0d6210SFaiz Abbas bool is_tuning; 1107d326930SKishon Vijay Abraham I }; 1117d326930SKishon Vijay Abraham I 1128d20b2eaSKishon Vijay Abraham I static void sdhci_omap_start_clock(struct sdhci_omap_host *omap_host); 1138d20b2eaSKishon Vijay Abraham I static void sdhci_omap_stop_clock(struct sdhci_omap_host *omap_host); 1148d20b2eaSKishon Vijay Abraham I 1157d326930SKishon Vijay Abraham I static inline u32 sdhci_omap_readl(struct sdhci_omap_host *host, 1167d326930SKishon Vijay Abraham I unsigned int offset) 1177d326930SKishon Vijay Abraham I { 1187d326930SKishon Vijay Abraham I return readl(host->base + offset); 1197d326930SKishon Vijay Abraham I } 1207d326930SKishon Vijay Abraham I 1217d326930SKishon Vijay Abraham I static inline void sdhci_omap_writel(struct sdhci_omap_host *host, 1227d326930SKishon Vijay Abraham I unsigned int offset, u32 data) 1237d326930SKishon Vijay Abraham I { 1247d326930SKishon Vijay Abraham I writel(data, host->base + offset); 1257d326930SKishon Vijay Abraham I } 1267d326930SKishon Vijay Abraham I 1277d326930SKishon Vijay Abraham I static int sdhci_omap_set_pbias(struct sdhci_omap_host *omap_host, 1287d326930SKishon Vijay Abraham I bool power_on, unsigned int iov) 1297d326930SKishon Vijay Abraham I { 1307d326930SKishon Vijay Abraham I int ret; 1317d326930SKishon Vijay Abraham I struct device *dev = omap_host->dev; 1327d326930SKishon Vijay Abraham I 1337d326930SKishon Vijay Abraham I if (IS_ERR(omap_host->pbias)) 1347d326930SKishon Vijay Abraham I return 0; 1357d326930SKishon Vijay Abraham I 1367d326930SKishon Vijay Abraham I if (power_on) { 1377d326930SKishon Vijay Abraham I ret = regulator_set_voltage(omap_host->pbias, iov, iov); 1387d326930SKishon Vijay Abraham I if (ret) { 1397d326930SKishon Vijay Abraham I dev_err(dev, "pbias set voltage failed\n"); 1407d326930SKishon Vijay Abraham I return ret; 1417d326930SKishon Vijay Abraham I } 1427d326930SKishon Vijay Abraham I 1437d326930SKishon Vijay Abraham I if (omap_host->pbias_enabled) 1447d326930SKishon Vijay Abraham I return 0; 1457d326930SKishon Vijay Abraham I 1467d326930SKishon Vijay Abraham I ret = regulator_enable(omap_host->pbias); 1477d326930SKishon Vijay Abraham I if (ret) { 1487d326930SKishon Vijay Abraham I dev_err(dev, "pbias reg enable fail\n"); 1497d326930SKishon Vijay Abraham I return ret; 1507d326930SKishon Vijay Abraham I } 1517d326930SKishon Vijay Abraham I 1527d326930SKishon Vijay Abraham I omap_host->pbias_enabled = true; 1537d326930SKishon Vijay Abraham I } else { 1547d326930SKishon Vijay Abraham I if (!omap_host->pbias_enabled) 1557d326930SKishon Vijay Abraham I return 0; 1567d326930SKishon Vijay Abraham I 1577d326930SKishon Vijay Abraham I ret = regulator_disable(omap_host->pbias); 1587d326930SKishon Vijay Abraham I if (ret) { 1597d326930SKishon Vijay Abraham I dev_err(dev, "pbias reg disable fail\n"); 1607d326930SKishon Vijay Abraham I return ret; 1617d326930SKishon Vijay Abraham I } 1627d326930SKishon Vijay Abraham I omap_host->pbias_enabled = false; 1637d326930SKishon Vijay Abraham I } 1647d326930SKishon Vijay Abraham I 1657d326930SKishon Vijay Abraham I return 0; 1667d326930SKishon Vijay Abraham I } 1677d326930SKishon Vijay Abraham I 1687d326930SKishon Vijay Abraham I static int sdhci_omap_enable_iov(struct sdhci_omap_host *omap_host, 1697d326930SKishon Vijay Abraham I unsigned int iov) 1707d326930SKishon Vijay Abraham I { 1717d326930SKishon Vijay Abraham I int ret; 1727d326930SKishon Vijay Abraham I struct sdhci_host *host = omap_host->host; 1737d326930SKishon Vijay Abraham I struct mmc_host *mmc = host->mmc; 1747d326930SKishon Vijay Abraham I 1757d326930SKishon Vijay Abraham I ret = sdhci_omap_set_pbias(omap_host, false, 0); 1767d326930SKishon Vijay Abraham I if (ret) 1777d326930SKishon Vijay Abraham I return ret; 1787d326930SKishon Vijay Abraham I 1797d326930SKishon Vijay Abraham I if (!IS_ERR(mmc->supply.vqmmc)) { 1807d326930SKishon Vijay Abraham I ret = regulator_set_voltage(mmc->supply.vqmmc, iov, iov); 1817d326930SKishon Vijay Abraham I if (ret) { 1827d326930SKishon Vijay Abraham I dev_err(mmc_dev(mmc), "vqmmc set voltage failed\n"); 1837d326930SKishon Vijay Abraham I return ret; 1847d326930SKishon Vijay Abraham I } 1857d326930SKishon Vijay Abraham I } 1867d326930SKishon Vijay Abraham I 1877d326930SKishon Vijay Abraham I ret = sdhci_omap_set_pbias(omap_host, true, iov); 1887d326930SKishon Vijay Abraham I if (ret) 1897d326930SKishon Vijay Abraham I return ret; 1907d326930SKishon Vijay Abraham I 1917d326930SKishon Vijay Abraham I return 0; 1927d326930SKishon Vijay Abraham I } 1937d326930SKishon Vijay Abraham I 1947d326930SKishon Vijay Abraham I static void sdhci_omap_conf_bus_power(struct sdhci_omap_host *omap_host, 1957d326930SKishon Vijay Abraham I unsigned char signal_voltage) 1967d326930SKishon Vijay Abraham I { 1977d326930SKishon Vijay Abraham I u32 reg; 1987d326930SKishon Vijay Abraham I ktime_t timeout; 1997d326930SKishon Vijay Abraham I 2007d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_HCTL); 2017d326930SKishon Vijay Abraham I reg &= ~HCTL_SDVS_MASK; 2027d326930SKishon Vijay Abraham I 2037d326930SKishon Vijay Abraham I if (signal_voltage == MMC_SIGNAL_VOLTAGE_330) 2047d326930SKishon Vijay Abraham I reg |= HCTL_SDVS_33; 2057d326930SKishon Vijay Abraham I else 2067d326930SKishon Vijay Abraham I reg |= HCTL_SDVS_18; 2077d326930SKishon Vijay Abraham I 2087d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_HCTL, reg); 2097d326930SKishon Vijay Abraham I 2107d326930SKishon Vijay Abraham I reg |= HCTL_SDBP; 2117d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_HCTL, reg); 2127d326930SKishon Vijay Abraham I 2137d326930SKishon Vijay Abraham I /* wait 1ms */ 2147d326930SKishon Vijay Abraham I timeout = ktime_add_ms(ktime_get(), SDHCI_OMAP_TIMEOUT); 2159f0ea0bdSAdrian Hunter while (1) { 2169f0ea0bdSAdrian Hunter bool timedout = ktime_after(ktime_get(), timeout); 2179f0ea0bdSAdrian Hunter 2189f0ea0bdSAdrian Hunter if (sdhci_omap_readl(omap_host, SDHCI_OMAP_HCTL) & HCTL_SDBP) 2199f0ea0bdSAdrian Hunter break; 2209f0ea0bdSAdrian Hunter if (WARN_ON(timedout)) 2217d326930SKishon Vijay Abraham I return; 2227d326930SKishon Vijay Abraham I usleep_range(5, 10); 2237d326930SKishon Vijay Abraham I } 2247d326930SKishon Vijay Abraham I } 2257d326930SKishon Vijay Abraham I 226efde12b2SKishon Vijay Abraham I static void sdhci_omap_enable_sdio_irq(struct mmc_host *mmc, int enable) 227efde12b2SKishon Vijay Abraham I { 228efde12b2SKishon Vijay Abraham I struct sdhci_host *host = mmc_priv(mmc); 229efde12b2SKishon Vijay Abraham I struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 230efde12b2SKishon Vijay Abraham I struct sdhci_omap_host *omap_host = sdhci_pltfm_priv(pltfm_host); 231efde12b2SKishon Vijay Abraham I u32 reg; 232efde12b2SKishon Vijay Abraham I 233efde12b2SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CON); 234efde12b2SKishon Vijay Abraham I if (enable) 235efde12b2SKishon Vijay Abraham I reg |= (CON_CTPL | CON_CLKEXTFREE); 236efde12b2SKishon Vijay Abraham I else 237efde12b2SKishon Vijay Abraham I reg &= ~(CON_CTPL | CON_CLKEXTFREE); 238efde12b2SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_CON, reg); 239efde12b2SKishon Vijay Abraham I 240efde12b2SKishon Vijay Abraham I sdhci_enable_sdio_irq(mmc, enable); 241efde12b2SKishon Vijay Abraham I } 242efde12b2SKishon Vijay Abraham I 2439fc2cd76SKishon Vijay Abraham I static inline void sdhci_omap_set_dll(struct sdhci_omap_host *omap_host, 2449fc2cd76SKishon Vijay Abraham I int count) 2459fc2cd76SKishon Vijay Abraham I { 2469fc2cd76SKishon Vijay Abraham I int i; 2479fc2cd76SKishon Vijay Abraham I u32 reg; 2489fc2cd76SKishon Vijay Abraham I 2499fc2cd76SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_DLL); 2509fc2cd76SKishon Vijay Abraham I reg |= DLL_FORCE_VALUE; 2519fc2cd76SKishon Vijay Abraham I reg &= ~DLL_FORCE_SR_C_MASK; 2529fc2cd76SKishon Vijay Abraham I reg |= (count << DLL_FORCE_SR_C_SHIFT); 2539fc2cd76SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_DLL, reg); 2549fc2cd76SKishon Vijay Abraham I 2559fc2cd76SKishon Vijay Abraham I reg |= DLL_CALIB; 2569fc2cd76SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_DLL, reg); 2579fc2cd76SKishon Vijay Abraham I for (i = 0; i < 1000; i++) { 2589fc2cd76SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_DLL); 2599fc2cd76SKishon Vijay Abraham I if (reg & DLL_CALIB) 2609fc2cd76SKishon Vijay Abraham I break; 2619fc2cd76SKishon Vijay Abraham I } 2629fc2cd76SKishon Vijay Abraham I reg &= ~DLL_CALIB; 2639fc2cd76SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_DLL, reg); 2649fc2cd76SKishon Vijay Abraham I } 2659fc2cd76SKishon Vijay Abraham I 2669fc2cd76SKishon Vijay Abraham I static void sdhci_omap_disable_tuning(struct sdhci_omap_host *omap_host) 2679fc2cd76SKishon Vijay Abraham I { 2689fc2cd76SKishon Vijay Abraham I u32 reg; 2699fc2cd76SKishon Vijay Abraham I 2709fc2cd76SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_AC12); 2719fc2cd76SKishon Vijay Abraham I reg &= ~AC12_SCLK_SEL; 2729fc2cd76SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_AC12, reg); 2739fc2cd76SKishon Vijay Abraham I 2749fc2cd76SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_DLL); 2759fc2cd76SKishon Vijay Abraham I reg &= ~(DLL_FORCE_VALUE | DLL_SWT); 2769fc2cd76SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_DLL, reg); 2779fc2cd76SKishon Vijay Abraham I } 2789fc2cd76SKishon Vijay Abraham I 2799fc2cd76SKishon Vijay Abraham I static int sdhci_omap_execute_tuning(struct mmc_host *mmc, u32 opcode) 2809fc2cd76SKishon Vijay Abraham I { 2819fc2cd76SKishon Vijay Abraham I struct sdhci_host *host = mmc_priv(mmc); 2829fc2cd76SKishon Vijay Abraham I struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 2839fc2cd76SKishon Vijay Abraham I struct sdhci_omap_host *omap_host = sdhci_pltfm_priv(pltfm_host); 284961de0a8SFaiz Abbas struct thermal_zone_device *thermal_dev; 2859fc2cd76SKishon Vijay Abraham I struct device *dev = omap_host->dev; 2869fc2cd76SKishon Vijay Abraham I struct mmc_ios *ios = &mmc->ios; 2879fc2cd76SKishon Vijay Abraham I u32 start_window = 0, max_window = 0; 288961de0a8SFaiz Abbas bool single_point_failure = false; 289db2039fcSFaiz Abbas bool dcrc_was_enabled = false; 2909fc2cd76SKishon Vijay Abraham I u8 cur_match, prev_match = 0; 2919fc2cd76SKishon Vijay Abraham I u32 length = 0, max_len = 0; 2929fc2cd76SKishon Vijay Abraham I u32 phase_delay = 0; 293961de0a8SFaiz Abbas int temperature; 2949fc2cd76SKishon Vijay Abraham I int ret = 0; 2959fc2cd76SKishon Vijay Abraham I u32 reg; 296961de0a8SFaiz Abbas int i; 2979fc2cd76SKishon Vijay Abraham I 2989fc2cd76SKishon Vijay Abraham I /* clock tuning is not needed for upto 52MHz */ 2999fc2cd76SKishon Vijay Abraham I if (ios->clock <= 52000000) 3009fc2cd76SKishon Vijay Abraham I return 0; 3019fc2cd76SKishon Vijay Abraham I 3029fc2cd76SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CAPA2); 3039fc2cd76SKishon Vijay Abraham I if (ios->timing == MMC_TIMING_UHS_SDR50 && !(reg & CAPA2_TSDR50)) 3049fc2cd76SKishon Vijay Abraham I return 0; 3059fc2cd76SKishon Vijay Abraham I 306961de0a8SFaiz Abbas thermal_dev = thermal_zone_get_zone_by_name("cpu_thermal"); 307961de0a8SFaiz Abbas if (IS_ERR(thermal_dev)) { 308961de0a8SFaiz Abbas dev_err(dev, "Unable to get thermal zone for tuning\n"); 309961de0a8SFaiz Abbas return PTR_ERR(thermal_dev); 310961de0a8SFaiz Abbas } 311961de0a8SFaiz Abbas 312961de0a8SFaiz Abbas ret = thermal_zone_get_temp(thermal_dev, &temperature); 313961de0a8SFaiz Abbas if (ret) 314961de0a8SFaiz Abbas return ret; 315961de0a8SFaiz Abbas 3169fc2cd76SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_DLL); 3179fc2cd76SKishon Vijay Abraham I reg |= DLL_SWT; 3189fc2cd76SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_DLL, reg); 3199fc2cd76SKishon Vijay Abraham I 3207d33c358SKishon Vijay Abraham I /* 3217d33c358SKishon Vijay Abraham I * OMAP5/DRA74X/DRA72x Errata i802: 3227d33c358SKishon Vijay Abraham I * DCRC error interrupts (MMCHS_STAT[21] DCRC=0x1) can occur 3237d33c358SKishon Vijay Abraham I * during the tuning procedure. So disable it during the 3247d33c358SKishon Vijay Abraham I * tuning procedure. 3257d33c358SKishon Vijay Abraham I */ 326db2039fcSFaiz Abbas if (host->ier & SDHCI_INT_DATA_CRC) { 327db2039fcSFaiz Abbas host->ier &= ~SDHCI_INT_DATA_CRC; 328db2039fcSFaiz Abbas dcrc_was_enabled = true; 329db2039fcSFaiz Abbas } 3307d33c358SKishon Vijay Abraham I 3315b0d6210SFaiz Abbas omap_host->is_tuning = true; 3325b0d6210SFaiz Abbas 333961de0a8SFaiz Abbas /* 334961de0a8SFaiz Abbas * Stage 1: Search for a maximum pass window ignoring any 335961de0a8SFaiz Abbas * any single point failures. If the tuning value ends up 336961de0a8SFaiz Abbas * near it, move away from it in stage 2 below 337961de0a8SFaiz Abbas */ 3389fc2cd76SKishon Vijay Abraham I while (phase_delay <= MAX_PHASE_DELAY) { 3399fc2cd76SKishon Vijay Abraham I sdhci_omap_set_dll(omap_host, phase_delay); 3409fc2cd76SKishon Vijay Abraham I 3419fc2cd76SKishon Vijay Abraham I cur_match = !mmc_send_tuning(mmc, opcode, NULL); 3429fc2cd76SKishon Vijay Abraham I if (cur_match) { 3439fc2cd76SKishon Vijay Abraham I if (prev_match) { 3449fc2cd76SKishon Vijay Abraham I length++; 345961de0a8SFaiz Abbas } else if (single_point_failure) { 346961de0a8SFaiz Abbas /* ignore single point failure */ 347961de0a8SFaiz Abbas length++; 3489fc2cd76SKishon Vijay Abraham I } else { 3499fc2cd76SKishon Vijay Abraham I start_window = phase_delay; 3509fc2cd76SKishon Vijay Abraham I length = 1; 3519fc2cd76SKishon Vijay Abraham I } 352961de0a8SFaiz Abbas } else { 353961de0a8SFaiz Abbas single_point_failure = prev_match; 3549fc2cd76SKishon Vijay Abraham I } 3559fc2cd76SKishon Vijay Abraham I 3569fc2cd76SKishon Vijay Abraham I if (length > max_len) { 3579fc2cd76SKishon Vijay Abraham I max_window = start_window; 3589fc2cd76SKishon Vijay Abraham I max_len = length; 3599fc2cd76SKishon Vijay Abraham I } 3609fc2cd76SKishon Vijay Abraham I 3619fc2cd76SKishon Vijay Abraham I prev_match = cur_match; 3629fc2cd76SKishon Vijay Abraham I phase_delay += 4; 3639fc2cd76SKishon Vijay Abraham I } 3649fc2cd76SKishon Vijay Abraham I 3659fc2cd76SKishon Vijay Abraham I if (!max_len) { 3669fc2cd76SKishon Vijay Abraham I dev_err(dev, "Unable to find match\n"); 3679fc2cd76SKishon Vijay Abraham I ret = -EIO; 3689fc2cd76SKishon Vijay Abraham I goto tuning_error; 3699fc2cd76SKishon Vijay Abraham I } 3709fc2cd76SKishon Vijay Abraham I 371961de0a8SFaiz Abbas /* 372961de0a8SFaiz Abbas * Assign tuning value as a ratio of maximum pass window based 373961de0a8SFaiz Abbas * on temperature 374961de0a8SFaiz Abbas */ 375961de0a8SFaiz Abbas if (temperature < -20000) 376feb40824SFaiz Abbas phase_delay = min(max_window + 4 * (max_len - 1) - 24, 377961de0a8SFaiz Abbas max_window + 378961de0a8SFaiz Abbas DIV_ROUND_UP(13 * max_len, 16) * 4); 379961de0a8SFaiz Abbas else if (temperature < 20000) 380961de0a8SFaiz Abbas phase_delay = max_window + DIV_ROUND_UP(9 * max_len, 16) * 4; 381961de0a8SFaiz Abbas else if (temperature < 40000) 382961de0a8SFaiz Abbas phase_delay = max_window + DIV_ROUND_UP(8 * max_len, 16) * 4; 383961de0a8SFaiz Abbas else if (temperature < 70000) 384961de0a8SFaiz Abbas phase_delay = max_window + DIV_ROUND_UP(7 * max_len, 16) * 4; 385961de0a8SFaiz Abbas else if (temperature < 90000) 386961de0a8SFaiz Abbas phase_delay = max_window + DIV_ROUND_UP(5 * max_len, 16) * 4; 387961de0a8SFaiz Abbas else if (temperature < 120000) 388961de0a8SFaiz Abbas phase_delay = max_window + DIV_ROUND_UP(4 * max_len, 16) * 4; 389961de0a8SFaiz Abbas else 390961de0a8SFaiz Abbas phase_delay = max_window + DIV_ROUND_UP(3 * max_len, 16) * 4; 391961de0a8SFaiz Abbas 392961de0a8SFaiz Abbas /* 393961de0a8SFaiz Abbas * Stage 2: Search for a single point failure near the chosen tuning 394961de0a8SFaiz Abbas * value in two steps. First in the +3 to +10 range and then in the 395961de0a8SFaiz Abbas * +2 to -10 range. If found, move away from it in the appropriate 396961de0a8SFaiz Abbas * direction by the appropriate amount depending on the temperature. 397961de0a8SFaiz Abbas */ 398961de0a8SFaiz Abbas for (i = 3; i <= 10; i++) { 399961de0a8SFaiz Abbas sdhci_omap_set_dll(omap_host, phase_delay + i); 400961de0a8SFaiz Abbas 401961de0a8SFaiz Abbas if (mmc_send_tuning(mmc, opcode, NULL)) { 402961de0a8SFaiz Abbas if (temperature < 10000) 403961de0a8SFaiz Abbas phase_delay += i + 6; 404961de0a8SFaiz Abbas else if (temperature < 20000) 405961de0a8SFaiz Abbas phase_delay += i - 12; 406961de0a8SFaiz Abbas else if (temperature < 70000) 407961de0a8SFaiz Abbas phase_delay += i - 8; 408961de0a8SFaiz Abbas else 409961de0a8SFaiz Abbas phase_delay += i - 6; 410961de0a8SFaiz Abbas 411961de0a8SFaiz Abbas goto single_failure_found; 412961de0a8SFaiz Abbas } 413961de0a8SFaiz Abbas } 414961de0a8SFaiz Abbas 415961de0a8SFaiz Abbas for (i = 2; i >= -10; i--) { 416961de0a8SFaiz Abbas sdhci_omap_set_dll(omap_host, phase_delay + i); 417961de0a8SFaiz Abbas 418961de0a8SFaiz Abbas if (mmc_send_tuning(mmc, opcode, NULL)) { 419961de0a8SFaiz Abbas if (temperature < 10000) 420961de0a8SFaiz Abbas phase_delay += i + 12; 421961de0a8SFaiz Abbas else if (temperature < 20000) 422961de0a8SFaiz Abbas phase_delay += i + 8; 423961de0a8SFaiz Abbas else if (temperature < 70000) 424961de0a8SFaiz Abbas phase_delay += i + 8; 425961de0a8SFaiz Abbas else if (temperature < 90000) 426961de0a8SFaiz Abbas phase_delay += i + 10; 427961de0a8SFaiz Abbas else 428961de0a8SFaiz Abbas phase_delay += i + 12; 429961de0a8SFaiz Abbas 430961de0a8SFaiz Abbas goto single_failure_found; 431961de0a8SFaiz Abbas } 432961de0a8SFaiz Abbas } 433961de0a8SFaiz Abbas 434961de0a8SFaiz Abbas single_failure_found: 4359fc2cd76SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_AC12); 4369fc2cd76SKishon Vijay Abraham I if (!(reg & AC12_SCLK_SEL)) { 4379fc2cd76SKishon Vijay Abraham I ret = -EIO; 4389fc2cd76SKishon Vijay Abraham I goto tuning_error; 4399fc2cd76SKishon Vijay Abraham I } 4409fc2cd76SKishon Vijay Abraham I 4419fc2cd76SKishon Vijay Abraham I sdhci_omap_set_dll(omap_host, phase_delay); 4429fc2cd76SKishon Vijay Abraham I 4435b0d6210SFaiz Abbas omap_host->is_tuning = false; 4445b0d6210SFaiz Abbas 4459fc2cd76SKishon Vijay Abraham I goto ret; 4469fc2cd76SKishon Vijay Abraham I 4479fc2cd76SKishon Vijay Abraham I tuning_error: 4485b0d6210SFaiz Abbas omap_host->is_tuning = false; 4499fc2cd76SKishon Vijay Abraham I dev_err(dev, "Tuning failed\n"); 4509fc2cd76SKishon Vijay Abraham I sdhci_omap_disable_tuning(omap_host); 4519fc2cd76SKishon Vijay Abraham I 4529fc2cd76SKishon Vijay Abraham I ret: 4539fc2cd76SKishon Vijay Abraham I sdhci_reset(host, SDHCI_RESET_CMD | SDHCI_RESET_DATA); 454db2039fcSFaiz Abbas /* Reenable forbidden interrupt */ 455db2039fcSFaiz Abbas if (dcrc_was_enabled) 456db2039fcSFaiz Abbas host->ier |= SDHCI_INT_DATA_CRC; 4577d33c358SKishon Vijay Abraham I sdhci_writel(host, host->ier, SDHCI_INT_ENABLE); 4587d33c358SKishon Vijay Abraham I sdhci_writel(host, host->ier, SDHCI_SIGNAL_ENABLE); 4599fc2cd76SKishon Vijay Abraham I return ret; 4609fc2cd76SKishon Vijay Abraham I } 4619fc2cd76SKishon Vijay Abraham I 46220ea26a1SKishon Vijay Abraham I static int sdhci_omap_card_busy(struct mmc_host *mmc) 46320ea26a1SKishon Vijay Abraham I { 46420ea26a1SKishon Vijay Abraham I u32 reg, ac12; 46520ea26a1SKishon Vijay Abraham I int ret = false; 46620ea26a1SKishon Vijay Abraham I struct sdhci_host *host = mmc_priv(mmc); 46720ea26a1SKishon Vijay Abraham I struct sdhci_pltfm_host *pltfm_host; 46820ea26a1SKishon Vijay Abraham I struct sdhci_omap_host *omap_host; 46920ea26a1SKishon Vijay Abraham I u32 ier = host->ier; 47020ea26a1SKishon Vijay Abraham I 47120ea26a1SKishon Vijay Abraham I pltfm_host = sdhci_priv(host); 47220ea26a1SKishon Vijay Abraham I omap_host = sdhci_pltfm_priv(pltfm_host); 47320ea26a1SKishon Vijay Abraham I 47420ea26a1SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CON); 47520ea26a1SKishon Vijay Abraham I ac12 = sdhci_omap_readl(omap_host, SDHCI_OMAP_AC12); 47620ea26a1SKishon Vijay Abraham I reg &= ~CON_CLKEXTFREE; 47720ea26a1SKishon Vijay Abraham I if (ac12 & AC12_V1V8_SIGEN) 47820ea26a1SKishon Vijay Abraham I reg |= CON_CLKEXTFREE; 47920ea26a1SKishon Vijay Abraham I reg |= CON_PADEN; 48020ea26a1SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_CON, reg); 48120ea26a1SKishon Vijay Abraham I 48220ea26a1SKishon Vijay Abraham I disable_irq(host->irq); 48320ea26a1SKishon Vijay Abraham I ier |= SDHCI_INT_CARD_INT; 48420ea26a1SKishon Vijay Abraham I sdhci_writel(host, ier, SDHCI_INT_ENABLE); 48520ea26a1SKishon Vijay Abraham I sdhci_writel(host, ier, SDHCI_SIGNAL_ENABLE); 48620ea26a1SKishon Vijay Abraham I 48720ea26a1SKishon Vijay Abraham I /* 48820ea26a1SKishon Vijay Abraham I * Delay is required for PSTATE to correctly reflect 48920ea26a1SKishon Vijay Abraham I * DLEV/CLEV values after PADEN is set. 49020ea26a1SKishon Vijay Abraham I */ 49120ea26a1SKishon Vijay Abraham I usleep_range(50, 100); 49220ea26a1SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_PSTATE); 49320ea26a1SKishon Vijay Abraham I if ((reg & PSTATE_DATI) || !(reg & PSTATE_DLEV_DAT0)) 49420ea26a1SKishon Vijay Abraham I ret = true; 49520ea26a1SKishon Vijay Abraham I 49620ea26a1SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CON); 49720ea26a1SKishon Vijay Abraham I reg &= ~(CON_CLKEXTFREE | CON_PADEN); 49820ea26a1SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_CON, reg); 49920ea26a1SKishon Vijay Abraham I 50020ea26a1SKishon Vijay Abraham I sdhci_writel(host, host->ier, SDHCI_INT_ENABLE); 50120ea26a1SKishon Vijay Abraham I sdhci_writel(host, host->ier, SDHCI_SIGNAL_ENABLE); 50220ea26a1SKishon Vijay Abraham I enable_irq(host->irq); 50320ea26a1SKishon Vijay Abraham I 50420ea26a1SKishon Vijay Abraham I return ret; 50520ea26a1SKishon Vijay Abraham I } 50620ea26a1SKishon Vijay Abraham I 5077d326930SKishon Vijay Abraham I static int sdhci_omap_start_signal_voltage_switch(struct mmc_host *mmc, 5087d326930SKishon Vijay Abraham I struct mmc_ios *ios) 5097d326930SKishon Vijay Abraham I { 5107d326930SKishon Vijay Abraham I u32 reg; 5117d326930SKishon Vijay Abraham I int ret; 5127d326930SKishon Vijay Abraham I unsigned int iov; 5137d326930SKishon Vijay Abraham I struct sdhci_host *host = mmc_priv(mmc); 5147d326930SKishon Vijay Abraham I struct sdhci_pltfm_host *pltfm_host; 5157d326930SKishon Vijay Abraham I struct sdhci_omap_host *omap_host; 5167d326930SKishon Vijay Abraham I struct device *dev; 5177d326930SKishon Vijay Abraham I 5187d326930SKishon Vijay Abraham I pltfm_host = sdhci_priv(host); 5197d326930SKishon Vijay Abraham I omap_host = sdhci_pltfm_priv(pltfm_host); 5207d326930SKishon Vijay Abraham I dev = omap_host->dev; 5217d326930SKishon Vijay Abraham I 5227d326930SKishon Vijay Abraham I if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_330) { 5237d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CAPA); 5247d326930SKishon Vijay Abraham I if (!(reg & CAPA_VS33)) 5257d326930SKishon Vijay Abraham I return -EOPNOTSUPP; 5267d326930SKishon Vijay Abraham I 5277d326930SKishon Vijay Abraham I sdhci_omap_conf_bus_power(omap_host, ios->signal_voltage); 5287d326930SKishon Vijay Abraham I 5297d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_AC12); 5307d326930SKishon Vijay Abraham I reg &= ~AC12_V1V8_SIGEN; 5317d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_AC12, reg); 5327d326930SKishon Vijay Abraham I 5337d326930SKishon Vijay Abraham I iov = IOV_3V3; 5347d326930SKishon Vijay Abraham I } else if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_180) { 5357d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CAPA); 5367d326930SKishon Vijay Abraham I if (!(reg & CAPA_VS18)) 5377d326930SKishon Vijay Abraham I return -EOPNOTSUPP; 5387d326930SKishon Vijay Abraham I 5397d326930SKishon Vijay Abraham I sdhci_omap_conf_bus_power(omap_host, ios->signal_voltage); 5407d326930SKishon Vijay Abraham I 5417d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_AC12); 5427d326930SKishon Vijay Abraham I reg |= AC12_V1V8_SIGEN; 5437d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_AC12, reg); 5447d326930SKishon Vijay Abraham I 5457d326930SKishon Vijay Abraham I iov = IOV_1V8; 5467d326930SKishon Vijay Abraham I } else { 5477d326930SKishon Vijay Abraham I return -EOPNOTSUPP; 5487d326930SKishon Vijay Abraham I } 5497d326930SKishon Vijay Abraham I 5507d326930SKishon Vijay Abraham I ret = sdhci_omap_enable_iov(omap_host, iov); 5517d326930SKishon Vijay Abraham I if (ret) { 5527d326930SKishon Vijay Abraham I dev_err(dev, "failed to switch IO voltage to %dmV\n", iov); 5537d326930SKishon Vijay Abraham I return ret; 5547d326930SKishon Vijay Abraham I } 5557d326930SKishon Vijay Abraham I 5567d326930SKishon Vijay Abraham I dev_dbg(dev, "IO voltage switched to %dmV\n", iov); 5577d326930SKishon Vijay Abraham I return 0; 5587d326930SKishon Vijay Abraham I } 5597d326930SKishon Vijay Abraham I 5608d20b2eaSKishon Vijay Abraham I static void sdhci_omap_set_timing(struct sdhci_omap_host *omap_host, u8 timing) 5618d20b2eaSKishon Vijay Abraham I { 5628d20b2eaSKishon Vijay Abraham I int ret; 5638d20b2eaSKishon Vijay Abraham I struct pinctrl_state *pinctrl_state; 5648d20b2eaSKishon Vijay Abraham I struct device *dev = omap_host->dev; 5658d20b2eaSKishon Vijay Abraham I 5668d20b2eaSKishon Vijay Abraham I if (!(omap_host->flags & SDHCI_OMAP_REQUIRE_IODELAY)) 5678d20b2eaSKishon Vijay Abraham I return; 5688d20b2eaSKishon Vijay Abraham I 5698d20b2eaSKishon Vijay Abraham I if (omap_host->timing == timing) 5708d20b2eaSKishon Vijay Abraham I return; 5718d20b2eaSKishon Vijay Abraham I 5728d20b2eaSKishon Vijay Abraham I sdhci_omap_stop_clock(omap_host); 5738d20b2eaSKishon Vijay Abraham I 5748d20b2eaSKishon Vijay Abraham I pinctrl_state = omap_host->pinctrl_state[timing]; 5758d20b2eaSKishon Vijay Abraham I ret = pinctrl_select_state(omap_host->pinctrl, pinctrl_state); 5768d20b2eaSKishon Vijay Abraham I if (ret) { 5778d20b2eaSKishon Vijay Abraham I dev_err(dev, "failed to select pinctrl state\n"); 5788d20b2eaSKishon Vijay Abraham I return; 5798d20b2eaSKishon Vijay Abraham I } 5808d20b2eaSKishon Vijay Abraham I 5818d20b2eaSKishon Vijay Abraham I sdhci_omap_start_clock(omap_host); 5828d20b2eaSKishon Vijay Abraham I omap_host->timing = timing; 5838d20b2eaSKishon Vijay Abraham I } 5848d20b2eaSKishon Vijay Abraham I 585300df508SKishon Vijay Abraham I static void sdhci_omap_set_power_mode(struct sdhci_omap_host *omap_host, 586300df508SKishon Vijay Abraham I u8 power_mode) 587300df508SKishon Vijay Abraham I { 5889fc2cd76SKishon Vijay Abraham I if (omap_host->bus_mode == MMC_POWER_OFF) 5899fc2cd76SKishon Vijay Abraham I sdhci_omap_disable_tuning(omap_host); 590300df508SKishon Vijay Abraham I omap_host->power_mode = power_mode; 591300df508SKishon Vijay Abraham I } 592300df508SKishon Vijay Abraham I 5937d326930SKishon Vijay Abraham I static void sdhci_omap_set_bus_mode(struct sdhci_omap_host *omap_host, 5947d326930SKishon Vijay Abraham I unsigned int mode) 5957d326930SKishon Vijay Abraham I { 5967d326930SKishon Vijay Abraham I u32 reg; 5977d326930SKishon Vijay Abraham I 5987d326930SKishon Vijay Abraham I if (omap_host->bus_mode == mode) 5997d326930SKishon Vijay Abraham I return; 6007d326930SKishon Vijay Abraham I 6017d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CON); 6027d326930SKishon Vijay Abraham I if (mode == MMC_BUSMODE_OPENDRAIN) 6037d326930SKishon Vijay Abraham I reg |= CON_OD; 6047d326930SKishon Vijay Abraham I else 6057d326930SKishon Vijay Abraham I reg &= ~CON_OD; 6067d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_CON, reg); 6077d326930SKishon Vijay Abraham I 6087d326930SKishon Vijay Abraham I omap_host->bus_mode = mode; 6097d326930SKishon Vijay Abraham I } 6107d326930SKishon Vijay Abraham I 611ddde0e7dSColin Ian King static void sdhci_omap_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) 6127d326930SKishon Vijay Abraham I { 6137d326930SKishon Vijay Abraham I struct sdhci_host *host = mmc_priv(mmc); 6147d326930SKishon Vijay Abraham I struct sdhci_pltfm_host *pltfm_host; 6157d326930SKishon Vijay Abraham I struct sdhci_omap_host *omap_host; 6167d326930SKishon Vijay Abraham I 6177d326930SKishon Vijay Abraham I pltfm_host = sdhci_priv(host); 6187d326930SKishon Vijay Abraham I omap_host = sdhci_pltfm_priv(pltfm_host); 6197d326930SKishon Vijay Abraham I 6207d326930SKishon Vijay Abraham I sdhci_omap_set_bus_mode(omap_host, ios->bus_mode); 6218d20b2eaSKishon Vijay Abraham I sdhci_omap_set_timing(omap_host, ios->timing); 6227d326930SKishon Vijay Abraham I sdhci_set_ios(mmc, ios); 623300df508SKishon Vijay Abraham I sdhci_omap_set_power_mode(omap_host, ios->power_mode); 6247d326930SKishon Vijay Abraham I } 6257d326930SKishon Vijay Abraham I 6267d326930SKishon Vijay Abraham I static u16 sdhci_omap_calc_divisor(struct sdhci_pltfm_host *host, 6277d326930SKishon Vijay Abraham I unsigned int clock) 6287d326930SKishon Vijay Abraham I { 6297d326930SKishon Vijay Abraham I u16 dsor; 6307d326930SKishon Vijay Abraham I 6317d326930SKishon Vijay Abraham I dsor = DIV_ROUND_UP(clk_get_rate(host->clk), clock); 6327d326930SKishon Vijay Abraham I if (dsor > SYSCTL_CLKD_MAX) 6337d326930SKishon Vijay Abraham I dsor = SYSCTL_CLKD_MAX; 6347d326930SKishon Vijay Abraham I 6357d326930SKishon Vijay Abraham I return dsor; 6367d326930SKishon Vijay Abraham I } 6377d326930SKishon Vijay Abraham I 6387d326930SKishon Vijay Abraham I static void sdhci_omap_start_clock(struct sdhci_omap_host *omap_host) 6397d326930SKishon Vijay Abraham I { 6407d326930SKishon Vijay Abraham I u32 reg; 6417d326930SKishon Vijay Abraham I 6427d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_SYSCTL); 6437d326930SKishon Vijay Abraham I reg |= SYSCTL_CEN; 6447d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_SYSCTL, reg); 6457d326930SKishon Vijay Abraham I } 6467d326930SKishon Vijay Abraham I 6477d326930SKishon Vijay Abraham I static void sdhci_omap_stop_clock(struct sdhci_omap_host *omap_host) 6487d326930SKishon Vijay Abraham I { 6497d326930SKishon Vijay Abraham I u32 reg; 6507d326930SKishon Vijay Abraham I 6517d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_SYSCTL); 6527d326930SKishon Vijay Abraham I reg &= ~SYSCTL_CEN; 6537d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_SYSCTL, reg); 6547d326930SKishon Vijay Abraham I } 6557d326930SKishon Vijay Abraham I 6567d326930SKishon Vijay Abraham I static void sdhci_omap_set_clock(struct sdhci_host *host, unsigned int clock) 6577d326930SKishon Vijay Abraham I { 6587d326930SKishon Vijay Abraham I struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 6597d326930SKishon Vijay Abraham I struct sdhci_omap_host *omap_host = sdhci_pltfm_priv(pltfm_host); 6607d326930SKishon Vijay Abraham I unsigned long clkdiv; 6617d326930SKishon Vijay Abraham I 6627d326930SKishon Vijay Abraham I sdhci_omap_stop_clock(omap_host); 6637d326930SKishon Vijay Abraham I 6647d326930SKishon Vijay Abraham I if (!clock) 6657d326930SKishon Vijay Abraham I return; 6667d326930SKishon Vijay Abraham I 6677d326930SKishon Vijay Abraham I clkdiv = sdhci_omap_calc_divisor(pltfm_host, clock); 6687d326930SKishon Vijay Abraham I clkdiv = (clkdiv & SYSCTL_CLKD_MASK) << SYSCTL_CLKD_SHIFT; 6697d326930SKishon Vijay Abraham I sdhci_enable_clk(host, clkdiv); 6707d326930SKishon Vijay Abraham I 6717d326930SKishon Vijay Abraham I sdhci_omap_start_clock(omap_host); 6727d326930SKishon Vijay Abraham I } 6737d326930SKishon Vijay Abraham I 674ddde0e7dSColin Ian King static void sdhci_omap_set_power(struct sdhci_host *host, unsigned char mode, 6757d326930SKishon Vijay Abraham I unsigned short vdd) 6767d326930SKishon Vijay Abraham I { 6777d326930SKishon Vijay Abraham I struct mmc_host *mmc = host->mmc; 6787d326930SKishon Vijay Abraham I 6797d326930SKishon Vijay Abraham I mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, vdd); 6807d326930SKishon Vijay Abraham I } 6817d326930SKishon Vijay Abraham I 6827d326930SKishon Vijay Abraham I static int sdhci_omap_enable_dma(struct sdhci_host *host) 6837d326930SKishon Vijay Abraham I { 6847d326930SKishon Vijay Abraham I u32 reg; 6857d326930SKishon Vijay Abraham I struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 6867d326930SKishon Vijay Abraham I struct sdhci_omap_host *omap_host = sdhci_pltfm_priv(pltfm_host); 6877d326930SKishon Vijay Abraham I 6887d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CON); 689195fadb7SChunyan Zhang reg &= ~CON_DMA_MASTER; 690195fadb7SChunyan Zhang /* Switch to DMA slave mode when using external DMA */ 691195fadb7SChunyan Zhang if (!host->use_external_dma) 6927d326930SKishon Vijay Abraham I reg |= CON_DMA_MASTER; 693195fadb7SChunyan Zhang 6947d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_CON, reg); 6957d326930SKishon Vijay Abraham I 6967d326930SKishon Vijay Abraham I return 0; 6977d326930SKishon Vijay Abraham I } 6987d326930SKishon Vijay Abraham I 699ddde0e7dSColin Ian King static unsigned int sdhci_omap_get_min_clock(struct sdhci_host *host) 7007d326930SKishon Vijay Abraham I { 7017d326930SKishon Vijay Abraham I struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 7027d326930SKishon Vijay Abraham I 7037d326930SKishon Vijay Abraham I return clk_get_rate(pltfm_host->clk) / SYSCTL_CLKD_MAX; 7047d326930SKishon Vijay Abraham I } 7057d326930SKishon Vijay Abraham I 7067d326930SKishon Vijay Abraham I static void sdhci_omap_set_bus_width(struct sdhci_host *host, int width) 7077d326930SKishon Vijay Abraham I { 7087d326930SKishon Vijay Abraham I struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 7097d326930SKishon Vijay Abraham I struct sdhci_omap_host *omap_host = sdhci_pltfm_priv(pltfm_host); 7107d326930SKishon Vijay Abraham I u32 reg; 7117d326930SKishon Vijay Abraham I 7127d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CON); 7137d326930SKishon Vijay Abraham I if (width == MMC_BUS_WIDTH_8) 7147d326930SKishon Vijay Abraham I reg |= CON_DW8; 7157d326930SKishon Vijay Abraham I else 7167d326930SKishon Vijay Abraham I reg &= ~CON_DW8; 7177d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_CON, reg); 7187d326930SKishon Vijay Abraham I 7197d326930SKishon Vijay Abraham I sdhci_set_bus_width(host, width); 7207d326930SKishon Vijay Abraham I } 7217d326930SKishon Vijay Abraham I 7227d326930SKishon Vijay Abraham I static void sdhci_omap_init_74_clocks(struct sdhci_host *host, u8 power_mode) 7237d326930SKishon Vijay Abraham I { 7247d326930SKishon Vijay Abraham I u32 reg; 7257d326930SKishon Vijay Abraham I ktime_t timeout; 7267d326930SKishon Vijay Abraham I struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 7277d326930SKishon Vijay Abraham I struct sdhci_omap_host *omap_host = sdhci_pltfm_priv(pltfm_host); 7287d326930SKishon Vijay Abraham I 7297d326930SKishon Vijay Abraham I if (omap_host->power_mode == power_mode) 7307d326930SKishon Vijay Abraham I return; 7317d326930SKishon Vijay Abraham I 7327d326930SKishon Vijay Abraham I if (power_mode != MMC_POWER_ON) 7337d326930SKishon Vijay Abraham I return; 7347d326930SKishon Vijay Abraham I 7357d326930SKishon Vijay Abraham I disable_irq(host->irq); 7367d326930SKishon Vijay Abraham I 7377d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CON); 7387d326930SKishon Vijay Abraham I reg |= CON_INIT; 7397d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_CON, reg); 7407d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_CMD, 0x0); 7417d326930SKishon Vijay Abraham I 7427d326930SKishon Vijay Abraham I /* wait 1ms */ 7437d326930SKishon Vijay Abraham I timeout = ktime_add_ms(ktime_get(), SDHCI_OMAP_TIMEOUT); 7449f0ea0bdSAdrian Hunter while (1) { 7459f0ea0bdSAdrian Hunter bool timedout = ktime_after(ktime_get(), timeout); 7469f0ea0bdSAdrian Hunter 7479f0ea0bdSAdrian Hunter if (sdhci_omap_readl(omap_host, SDHCI_OMAP_STAT) & INT_CC_EN) 7489f0ea0bdSAdrian Hunter break; 7499f0ea0bdSAdrian Hunter if (WARN_ON(timedout)) 7507d326930SKishon Vijay Abraham I return; 7517d326930SKishon Vijay Abraham I usleep_range(5, 10); 7527d326930SKishon Vijay Abraham I } 7537d326930SKishon Vijay Abraham I 7547d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CON); 7557d326930SKishon Vijay Abraham I reg &= ~CON_INIT; 7567d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_CON, reg); 7577d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_STAT, INT_CC_EN); 7587d326930SKishon Vijay Abraham I 7597d326930SKishon Vijay Abraham I enable_irq(host->irq); 7607d326930SKishon Vijay Abraham I } 7617d326930SKishon Vijay Abraham I 76227ceb7e0SKishon Vijay Abraham I static void sdhci_omap_set_uhs_signaling(struct sdhci_host *host, 76327ceb7e0SKishon Vijay Abraham I unsigned int timing) 76427ceb7e0SKishon Vijay Abraham I { 76527ceb7e0SKishon Vijay Abraham I u32 reg; 76627ceb7e0SKishon Vijay Abraham I struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 76727ceb7e0SKishon Vijay Abraham I struct sdhci_omap_host *omap_host = sdhci_pltfm_priv(pltfm_host); 76827ceb7e0SKishon Vijay Abraham I 76927ceb7e0SKishon Vijay Abraham I sdhci_omap_stop_clock(omap_host); 77027ceb7e0SKishon Vijay Abraham I 77127ceb7e0SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CON); 77227ceb7e0SKishon Vijay Abraham I if (timing == MMC_TIMING_UHS_DDR50 || timing == MMC_TIMING_MMC_DDR52) 77327ceb7e0SKishon Vijay Abraham I reg |= CON_DDR; 77427ceb7e0SKishon Vijay Abraham I else 77527ceb7e0SKishon Vijay Abraham I reg &= ~CON_DDR; 77627ceb7e0SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_CON, reg); 77727ceb7e0SKishon Vijay Abraham I 77827ceb7e0SKishon Vijay Abraham I sdhci_set_uhs_signaling(host, timing); 77927ceb7e0SKishon Vijay Abraham I sdhci_omap_start_clock(omap_host); 78027ceb7e0SKishon Vijay Abraham I } 78127ceb7e0SKishon Vijay Abraham I 7822198eeffSYueHaibing static void sdhci_omap_reset(struct sdhci_host *host, u8 mask) 7835b0d6210SFaiz Abbas { 7845b0d6210SFaiz Abbas struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 7855b0d6210SFaiz Abbas struct sdhci_omap_host *omap_host = sdhci_pltfm_priv(pltfm_host); 7865b0d6210SFaiz Abbas 7875b0d6210SFaiz Abbas /* Don't reset data lines during tuning operation */ 7885b0d6210SFaiz Abbas if (omap_host->is_tuning) 7895b0d6210SFaiz Abbas mask &= ~SDHCI_RESET_DATA; 7905b0d6210SFaiz Abbas 7915b0d6210SFaiz Abbas sdhci_reset(host, mask); 7925b0d6210SFaiz Abbas } 7935b0d6210SFaiz Abbas 7945c41ea6dSFaiz Abbas #define CMD_ERR_MASK (SDHCI_INT_CRC | SDHCI_INT_END_BIT | SDHCI_INT_INDEX |\ 7955c41ea6dSFaiz Abbas SDHCI_INT_TIMEOUT) 7965c41ea6dSFaiz Abbas #define CMD_MASK (CMD_ERR_MASK | SDHCI_INT_RESPONSE) 7975c41ea6dSFaiz Abbas 7985c41ea6dSFaiz Abbas static u32 sdhci_omap_irq(struct sdhci_host *host, u32 intmask) 7995c41ea6dSFaiz Abbas { 8005c41ea6dSFaiz Abbas struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 8015c41ea6dSFaiz Abbas struct sdhci_omap_host *omap_host = sdhci_pltfm_priv(pltfm_host); 8025c41ea6dSFaiz Abbas 8035c41ea6dSFaiz Abbas if (omap_host->is_tuning && host->cmd && !host->data_early && 8045c41ea6dSFaiz Abbas (intmask & CMD_ERR_MASK)) { 8055c41ea6dSFaiz Abbas 8065c41ea6dSFaiz Abbas /* 8075c41ea6dSFaiz Abbas * Since we are not resetting data lines during tuning 8085c41ea6dSFaiz Abbas * operation, data error or data complete interrupts 8095c41ea6dSFaiz Abbas * might still arrive. Mark this request as a failure 8105c41ea6dSFaiz Abbas * but still wait for the data interrupt 8115c41ea6dSFaiz Abbas */ 8125c41ea6dSFaiz Abbas if (intmask & SDHCI_INT_TIMEOUT) 8135c41ea6dSFaiz Abbas host->cmd->error = -ETIMEDOUT; 8145c41ea6dSFaiz Abbas else 8155c41ea6dSFaiz Abbas host->cmd->error = -EILSEQ; 8165c41ea6dSFaiz Abbas 8175c41ea6dSFaiz Abbas host->cmd = NULL; 8185c41ea6dSFaiz Abbas 8195c41ea6dSFaiz Abbas /* 8205c41ea6dSFaiz Abbas * Sometimes command error interrupts and command complete 8215c41ea6dSFaiz Abbas * interrupt will arrive together. Clear all command related 8225c41ea6dSFaiz Abbas * interrupts here. 8235c41ea6dSFaiz Abbas */ 8245c41ea6dSFaiz Abbas sdhci_writel(host, intmask & CMD_MASK, SDHCI_INT_STATUS); 8255c41ea6dSFaiz Abbas intmask &= ~CMD_MASK; 8265c41ea6dSFaiz Abbas } 8275c41ea6dSFaiz Abbas 8285c41ea6dSFaiz Abbas return intmask; 8295c41ea6dSFaiz Abbas } 8305c41ea6dSFaiz Abbas 8315da5e494SFaiz Abbas static void sdhci_omap_set_timeout(struct sdhci_host *host, 8325da5e494SFaiz Abbas struct mmc_command *cmd) 8335da5e494SFaiz Abbas { 8345da5e494SFaiz Abbas if (cmd->opcode == MMC_ERASE) 8355da5e494SFaiz Abbas sdhci_set_data_timeout_irq(host, false); 8365da5e494SFaiz Abbas 8375da5e494SFaiz Abbas __sdhci_set_timeout(host, cmd); 8385da5e494SFaiz Abbas } 8395da5e494SFaiz Abbas 8407d326930SKishon Vijay Abraham I static struct sdhci_ops sdhci_omap_ops = { 8417d326930SKishon Vijay Abraham I .set_clock = sdhci_omap_set_clock, 8427d326930SKishon Vijay Abraham I .set_power = sdhci_omap_set_power, 8437d326930SKishon Vijay Abraham I .enable_dma = sdhci_omap_enable_dma, 8447d326930SKishon Vijay Abraham I .get_max_clock = sdhci_pltfm_clk_get_max_clock, 8457d326930SKishon Vijay Abraham I .get_min_clock = sdhci_omap_get_min_clock, 8467d326930SKishon Vijay Abraham I .set_bus_width = sdhci_omap_set_bus_width, 8477d326930SKishon Vijay Abraham I .platform_send_init_74_clocks = sdhci_omap_init_74_clocks, 8485b0d6210SFaiz Abbas .reset = sdhci_omap_reset, 84927ceb7e0SKishon Vijay Abraham I .set_uhs_signaling = sdhci_omap_set_uhs_signaling, 8505c41ea6dSFaiz Abbas .irq = sdhci_omap_irq, 8515da5e494SFaiz Abbas .set_timeout = sdhci_omap_set_timeout, 8527d326930SKishon Vijay Abraham I }; 8537d326930SKishon Vijay Abraham I 8547d326930SKishon Vijay Abraham I static int sdhci_omap_set_capabilities(struct sdhci_omap_host *omap_host) 8557d326930SKishon Vijay Abraham I { 8567d326930SKishon Vijay Abraham I u32 reg; 8577d326930SKishon Vijay Abraham I int ret = 0; 8587d326930SKishon Vijay Abraham I struct device *dev = omap_host->dev; 8597d326930SKishon Vijay Abraham I struct regulator *vqmmc; 8607d326930SKishon Vijay Abraham I 8617d326930SKishon Vijay Abraham I vqmmc = regulator_get(dev, "vqmmc"); 8627d326930SKishon Vijay Abraham I if (IS_ERR(vqmmc)) { 8637d326930SKishon Vijay Abraham I ret = PTR_ERR(vqmmc); 8647d326930SKishon Vijay Abraham I goto reg_put; 8657d326930SKishon Vijay Abraham I } 8667d326930SKishon Vijay Abraham I 8677d326930SKishon Vijay Abraham I /* voltage capabilities might be set by boot loader, clear it */ 8687d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CAPA); 8697d326930SKishon Vijay Abraham I reg &= ~(CAPA_VS18 | CAPA_VS30 | CAPA_VS33); 8707d326930SKishon Vijay Abraham I 8717d326930SKishon Vijay Abraham I if (regulator_is_supported_voltage(vqmmc, IOV_3V3, IOV_3V3)) 8727d326930SKishon Vijay Abraham I reg |= CAPA_VS33; 8737d326930SKishon Vijay Abraham I if (regulator_is_supported_voltage(vqmmc, IOV_1V8, IOV_1V8)) 8747d326930SKishon Vijay Abraham I reg |= CAPA_VS18; 8757d326930SKishon Vijay Abraham I 8767d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_CAPA, reg); 8777d326930SKishon Vijay Abraham I 8787d326930SKishon Vijay Abraham I reg_put: 8797d326930SKishon Vijay Abraham I regulator_put(vqmmc); 8807d326930SKishon Vijay Abraham I 8817d326930SKishon Vijay Abraham I return ret; 8827d326930SKishon Vijay Abraham I } 8837d326930SKishon Vijay Abraham I 8847d326930SKishon Vijay Abraham I static const struct sdhci_pltfm_data sdhci_omap_pdata = { 8857d326930SKishon Vijay Abraham I .quirks = SDHCI_QUIRK_BROKEN_CARD_DETECTION | 8867d326930SKishon Vijay Abraham I SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK | 8877d326930SKishon Vijay Abraham I SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN | 8887d326930SKishon Vijay Abraham I SDHCI_QUIRK_NO_HISPD_BIT | 8897d326930SKishon Vijay Abraham I SDHCI_QUIRK_BROKEN_ADMA_ZEROLEN_DESC, 890e0b2dbcfSKishon Vijay Abraham I .quirks2 = SDHCI_QUIRK2_ACMD23_BROKEN | 891e0b2dbcfSKishon Vijay Abraham I SDHCI_QUIRK2_PRESET_VALUE_BROKEN | 89225f80d86SKishon Vijay Abraham I SDHCI_QUIRK2_RSP_136_HAS_CRC | 89325f80d86SKishon Vijay Abraham I SDHCI_QUIRK2_DISABLE_HW_TIMEOUT, 8947d326930SKishon Vijay Abraham I .ops = &sdhci_omap_ops, 8957d326930SKishon Vijay Abraham I }; 8967d326930SKishon Vijay Abraham I 8976d75df75SKishon Vijay Abraham I static const struct sdhci_omap_data k2g_data = { 8986d75df75SKishon Vijay Abraham I .offset = 0x200, 8996d75df75SKishon Vijay Abraham I }; 9006d75df75SKishon Vijay Abraham I 901d6fe4928SFaiz Abbas static const struct sdhci_omap_data am335_data = { 902d6fe4928SFaiz Abbas .offset = 0x200, 903d6fe4928SFaiz Abbas }; 904d6fe4928SFaiz Abbas 905d6fe4928SFaiz Abbas static const struct sdhci_omap_data am437_data = { 906d6fe4928SFaiz Abbas .offset = 0x200, 907d6fe4928SFaiz Abbas }; 908d6fe4928SFaiz Abbas 9097d326930SKishon Vijay Abraham I static const struct sdhci_omap_data dra7_data = { 9107d326930SKishon Vijay Abraham I .offset = 0x200, 9118d20b2eaSKishon Vijay Abraham I .flags = SDHCI_OMAP_REQUIRE_IODELAY, 9127d326930SKishon Vijay Abraham I }; 9137d326930SKishon Vijay Abraham I 9147d326930SKishon Vijay Abraham I static const struct of_device_id omap_sdhci_match[] = { 9157d326930SKishon Vijay Abraham I { .compatible = "ti,dra7-sdhci", .data = &dra7_data }, 9166d75df75SKishon Vijay Abraham I { .compatible = "ti,k2g-sdhci", .data = &k2g_data }, 917d6fe4928SFaiz Abbas { .compatible = "ti,am335-sdhci", .data = &am335_data }, 918d6fe4928SFaiz Abbas { .compatible = "ti,am437-sdhci", .data = &am437_data }, 9197d326930SKishon Vijay Abraham I {}, 9207d326930SKishon Vijay Abraham I }; 9217d326930SKishon Vijay Abraham I MODULE_DEVICE_TABLE(of, omap_sdhci_match); 9227d326930SKishon Vijay Abraham I 9238d20b2eaSKishon Vijay Abraham I static struct pinctrl_state 9248d20b2eaSKishon Vijay Abraham I *sdhci_omap_iodelay_pinctrl_state(struct sdhci_omap_host *omap_host, char *mode, 9258d20b2eaSKishon Vijay Abraham I u32 *caps, u32 capmask) 9268d20b2eaSKishon Vijay Abraham I { 9278d20b2eaSKishon Vijay Abraham I struct device *dev = omap_host->dev; 928212f4f8aSKishon Vijay Abraham I char *version = omap_host->version; 9298d20b2eaSKishon Vijay Abraham I struct pinctrl_state *pinctrl_state = ERR_PTR(-ENODEV); 930212f4f8aSKishon Vijay Abraham I char str[20]; 9318d20b2eaSKishon Vijay Abraham I 9328d20b2eaSKishon Vijay Abraham I if (!(*caps & capmask)) 9338d20b2eaSKishon Vijay Abraham I goto ret; 9348d20b2eaSKishon Vijay Abraham I 935212f4f8aSKishon Vijay Abraham I if (version) { 936212f4f8aSKishon Vijay Abraham I snprintf(str, 20, "%s-%s", mode, version); 937212f4f8aSKishon Vijay Abraham I pinctrl_state = pinctrl_lookup_state(omap_host->pinctrl, str); 938212f4f8aSKishon Vijay Abraham I } 939212f4f8aSKishon Vijay Abraham I 940212f4f8aSKishon Vijay Abraham I if (IS_ERR(pinctrl_state)) 9418d20b2eaSKishon Vijay Abraham I pinctrl_state = pinctrl_lookup_state(omap_host->pinctrl, mode); 942212f4f8aSKishon Vijay Abraham I 9438d20b2eaSKishon Vijay Abraham I if (IS_ERR(pinctrl_state)) { 9448d20b2eaSKishon Vijay Abraham I dev_err(dev, "no pinctrl state for %s mode", mode); 9458d20b2eaSKishon Vijay Abraham I *caps &= ~capmask; 9468d20b2eaSKishon Vijay Abraham I } 9478d20b2eaSKishon Vijay Abraham I 9488d20b2eaSKishon Vijay Abraham I ret: 9498d20b2eaSKishon Vijay Abraham I return pinctrl_state; 9508d20b2eaSKishon Vijay Abraham I } 9518d20b2eaSKishon Vijay Abraham I 9528d20b2eaSKishon Vijay Abraham I static int sdhci_omap_config_iodelay_pinctrl_state(struct sdhci_omap_host 9538d20b2eaSKishon Vijay Abraham I *omap_host) 9548d20b2eaSKishon Vijay Abraham I { 9558d20b2eaSKishon Vijay Abraham I struct device *dev = omap_host->dev; 9568d20b2eaSKishon Vijay Abraham I struct sdhci_host *host = omap_host->host; 9578d20b2eaSKishon Vijay Abraham I struct mmc_host *mmc = host->mmc; 9588d20b2eaSKishon Vijay Abraham I u32 *caps = &mmc->caps; 9598d20b2eaSKishon Vijay Abraham I u32 *caps2 = &mmc->caps2; 9608d20b2eaSKishon Vijay Abraham I struct pinctrl_state *state; 9618d20b2eaSKishon Vijay Abraham I struct pinctrl_state **pinctrl_state; 9628d20b2eaSKishon Vijay Abraham I 9638d20b2eaSKishon Vijay Abraham I if (!(omap_host->flags & SDHCI_OMAP_REQUIRE_IODELAY)) 9648d20b2eaSKishon Vijay Abraham I return 0; 9658d20b2eaSKishon Vijay Abraham I 966a86854d0SKees Cook pinctrl_state = devm_kcalloc(dev, 967a86854d0SKees Cook MMC_TIMING_MMC_HS200 + 1, 968a86854d0SKees Cook sizeof(*pinctrl_state), 969a86854d0SKees Cook GFP_KERNEL); 9708d20b2eaSKishon Vijay Abraham I if (!pinctrl_state) 9718d20b2eaSKishon Vijay Abraham I return -ENOMEM; 9728d20b2eaSKishon Vijay Abraham I 9738d20b2eaSKishon Vijay Abraham I omap_host->pinctrl = devm_pinctrl_get(omap_host->dev); 9748d20b2eaSKishon Vijay Abraham I if (IS_ERR(omap_host->pinctrl)) { 9758d20b2eaSKishon Vijay Abraham I dev_err(dev, "Cannot get pinctrl\n"); 9768d20b2eaSKishon Vijay Abraham I return PTR_ERR(omap_host->pinctrl); 9778d20b2eaSKishon Vijay Abraham I } 9788d20b2eaSKishon Vijay Abraham I 9798d20b2eaSKishon Vijay Abraham I state = pinctrl_lookup_state(omap_host->pinctrl, "default"); 9808d20b2eaSKishon Vijay Abraham I if (IS_ERR(state)) { 9818d20b2eaSKishon Vijay Abraham I dev_err(dev, "no pinctrl state for default mode\n"); 9828d20b2eaSKishon Vijay Abraham I return PTR_ERR(state); 9838d20b2eaSKishon Vijay Abraham I } 9848d20b2eaSKishon Vijay Abraham I pinctrl_state[MMC_TIMING_LEGACY] = state; 9858d20b2eaSKishon Vijay Abraham I 9868d20b2eaSKishon Vijay Abraham I state = sdhci_omap_iodelay_pinctrl_state(omap_host, "sdr104", caps, 9878d20b2eaSKishon Vijay Abraham I MMC_CAP_UHS_SDR104); 9888d20b2eaSKishon Vijay Abraham I if (!IS_ERR(state)) 9898d20b2eaSKishon Vijay Abraham I pinctrl_state[MMC_TIMING_UHS_SDR104] = state; 9908d20b2eaSKishon Vijay Abraham I 9918d20b2eaSKishon Vijay Abraham I state = sdhci_omap_iodelay_pinctrl_state(omap_host, "ddr50", caps, 9928d20b2eaSKishon Vijay Abraham I MMC_CAP_UHS_DDR50); 9938d20b2eaSKishon Vijay Abraham I if (!IS_ERR(state)) 9948d20b2eaSKishon Vijay Abraham I pinctrl_state[MMC_TIMING_UHS_DDR50] = state; 9958d20b2eaSKishon Vijay Abraham I 9968d20b2eaSKishon Vijay Abraham I state = sdhci_omap_iodelay_pinctrl_state(omap_host, "sdr50", caps, 9978d20b2eaSKishon Vijay Abraham I MMC_CAP_UHS_SDR50); 9988d20b2eaSKishon Vijay Abraham I if (!IS_ERR(state)) 9998d20b2eaSKishon Vijay Abraham I pinctrl_state[MMC_TIMING_UHS_SDR50] = state; 10008d20b2eaSKishon Vijay Abraham I 10018d20b2eaSKishon Vijay Abraham I state = sdhci_omap_iodelay_pinctrl_state(omap_host, "sdr25", caps, 10028d20b2eaSKishon Vijay Abraham I MMC_CAP_UHS_SDR25); 10038d20b2eaSKishon Vijay Abraham I if (!IS_ERR(state)) 10048d20b2eaSKishon Vijay Abraham I pinctrl_state[MMC_TIMING_UHS_SDR25] = state; 10058d20b2eaSKishon Vijay Abraham I 10068d20b2eaSKishon Vijay Abraham I state = sdhci_omap_iodelay_pinctrl_state(omap_host, "sdr12", caps, 10078d20b2eaSKishon Vijay Abraham I MMC_CAP_UHS_SDR12); 10088d20b2eaSKishon Vijay Abraham I if (!IS_ERR(state)) 10098d20b2eaSKishon Vijay Abraham I pinctrl_state[MMC_TIMING_UHS_SDR12] = state; 10108d20b2eaSKishon Vijay Abraham I 10118d20b2eaSKishon Vijay Abraham I state = sdhci_omap_iodelay_pinctrl_state(omap_host, "ddr_1_8v", caps, 10128d20b2eaSKishon Vijay Abraham I MMC_CAP_1_8V_DDR); 10133f402878SKishon Vijay Abraham I if (!IS_ERR(state)) { 10143f402878SKishon Vijay Abraham I pinctrl_state[MMC_TIMING_MMC_DDR52] = state; 10153f402878SKishon Vijay Abraham I } else { 10163f402878SKishon Vijay Abraham I state = sdhci_omap_iodelay_pinctrl_state(omap_host, "ddr_3_3v", 10173f402878SKishon Vijay Abraham I caps, 10183f402878SKishon Vijay Abraham I MMC_CAP_3_3V_DDR); 10198d20b2eaSKishon Vijay Abraham I if (!IS_ERR(state)) 10208d20b2eaSKishon Vijay Abraham I pinctrl_state[MMC_TIMING_MMC_DDR52] = state; 10213f402878SKishon Vijay Abraham I } 10228d20b2eaSKishon Vijay Abraham I 10238d20b2eaSKishon Vijay Abraham I state = sdhci_omap_iodelay_pinctrl_state(omap_host, "hs", caps, 10248d20b2eaSKishon Vijay Abraham I MMC_CAP_SD_HIGHSPEED); 10258d20b2eaSKishon Vijay Abraham I if (!IS_ERR(state)) 10268d20b2eaSKishon Vijay Abraham I pinctrl_state[MMC_TIMING_SD_HS] = state; 10278d20b2eaSKishon Vijay Abraham I 10288d20b2eaSKishon Vijay Abraham I state = sdhci_omap_iodelay_pinctrl_state(omap_host, "hs", caps, 10298d20b2eaSKishon Vijay Abraham I MMC_CAP_MMC_HIGHSPEED); 10308d20b2eaSKishon Vijay Abraham I if (!IS_ERR(state)) 10318d20b2eaSKishon Vijay Abraham I pinctrl_state[MMC_TIMING_MMC_HS] = state; 10328d20b2eaSKishon Vijay Abraham I 10338d20b2eaSKishon Vijay Abraham I state = sdhci_omap_iodelay_pinctrl_state(omap_host, "hs200_1_8v", caps2, 10348d20b2eaSKishon Vijay Abraham I MMC_CAP2_HS200_1_8V_SDR); 10358d20b2eaSKishon Vijay Abraham I if (!IS_ERR(state)) 10368d20b2eaSKishon Vijay Abraham I pinctrl_state[MMC_TIMING_MMC_HS200] = state; 10378d20b2eaSKishon Vijay Abraham I 10388d20b2eaSKishon Vijay Abraham I omap_host->pinctrl_state = pinctrl_state; 10398d20b2eaSKishon Vijay Abraham I 10408d20b2eaSKishon Vijay Abraham I return 0; 10418d20b2eaSKishon Vijay Abraham I } 10428d20b2eaSKishon Vijay Abraham I 1043212f4f8aSKishon Vijay Abraham I static const struct soc_device_attribute sdhci_omap_soc_devices[] = { 1044212f4f8aSKishon Vijay Abraham I { 1045212f4f8aSKishon Vijay Abraham I .machine = "DRA7[45]*", 1046212f4f8aSKishon Vijay Abraham I .revision = "ES1.[01]", 1047212f4f8aSKishon Vijay Abraham I }, 1048212f4f8aSKishon Vijay Abraham I { 1049212f4f8aSKishon Vijay Abraham I /* sentinel */ 1050212f4f8aSKishon Vijay Abraham I } 1051212f4f8aSKishon Vijay Abraham I }; 1052212f4f8aSKishon Vijay Abraham I 10537d326930SKishon Vijay Abraham I static int sdhci_omap_probe(struct platform_device *pdev) 10547d326930SKishon Vijay Abraham I { 10557d326930SKishon Vijay Abraham I int ret; 10567d326930SKishon Vijay Abraham I u32 offset; 10577d326930SKishon Vijay Abraham I struct device *dev = &pdev->dev; 10587d326930SKishon Vijay Abraham I struct sdhci_host *host; 10597d326930SKishon Vijay Abraham I struct sdhci_pltfm_host *pltfm_host; 10607d326930SKishon Vijay Abraham I struct sdhci_omap_host *omap_host; 10617d326930SKishon Vijay Abraham I struct mmc_host *mmc; 10627d326930SKishon Vijay Abraham I const struct of_device_id *match; 10637d326930SKishon Vijay Abraham I struct sdhci_omap_data *data; 1064212f4f8aSKishon Vijay Abraham I const struct soc_device_attribute *soc; 1065195fadb7SChunyan Zhang struct resource *regs; 10667d326930SKishon Vijay Abraham I 10677d326930SKishon Vijay Abraham I match = of_match_device(omap_sdhci_match, dev); 10687d326930SKishon Vijay Abraham I if (!match) 10697d326930SKishon Vijay Abraham I return -EINVAL; 10707d326930SKishon Vijay Abraham I 10717d326930SKishon Vijay Abraham I data = (struct sdhci_omap_data *)match->data; 10727d326930SKishon Vijay Abraham I if (!data) { 10737d326930SKishon Vijay Abraham I dev_err(dev, "no sdhci omap data\n"); 10747d326930SKishon Vijay Abraham I return -EINVAL; 10757d326930SKishon Vijay Abraham I } 10767d326930SKishon Vijay Abraham I offset = data->offset; 10777d326930SKishon Vijay Abraham I 1078195fadb7SChunyan Zhang regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); 1079195fadb7SChunyan Zhang if (!regs) 1080195fadb7SChunyan Zhang return -ENXIO; 1081195fadb7SChunyan Zhang 10827d326930SKishon Vijay Abraham I host = sdhci_pltfm_init(pdev, &sdhci_omap_pdata, 10837d326930SKishon Vijay Abraham I sizeof(*omap_host)); 10847d326930SKishon Vijay Abraham I if (IS_ERR(host)) { 10857d326930SKishon Vijay Abraham I dev_err(dev, "Failed sdhci_pltfm_init\n"); 10867d326930SKishon Vijay Abraham I return PTR_ERR(host); 10877d326930SKishon Vijay Abraham I } 10887d326930SKishon Vijay Abraham I 10897d326930SKishon Vijay Abraham I pltfm_host = sdhci_priv(host); 10907d326930SKishon Vijay Abraham I omap_host = sdhci_pltfm_priv(pltfm_host); 10917d326930SKishon Vijay Abraham I omap_host->host = host; 10927d326930SKishon Vijay Abraham I omap_host->base = host->ioaddr; 10937d326930SKishon Vijay Abraham I omap_host->dev = dev; 1094300df508SKishon Vijay Abraham I omap_host->power_mode = MMC_POWER_UNDEFINED; 10958d20b2eaSKishon Vijay Abraham I omap_host->timing = MMC_TIMING_LEGACY; 10968d20b2eaSKishon Vijay Abraham I omap_host->flags = data->flags; 10977d326930SKishon Vijay Abraham I host->ioaddr += offset; 1098195fadb7SChunyan Zhang host->mapbase = regs->start + offset; 10997d326930SKishon Vijay Abraham I 11007d326930SKishon Vijay Abraham I mmc = host->mmc; 11011d3a2220SKishon Vijay Abraham I sdhci_get_of_property(pdev); 11027d326930SKishon Vijay Abraham I ret = mmc_of_parse(mmc); 11037d326930SKishon Vijay Abraham I if (ret) 11047d326930SKishon Vijay Abraham I goto err_pltfm_free; 11057d326930SKishon Vijay Abraham I 1106212f4f8aSKishon Vijay Abraham I soc = soc_device_match(sdhci_omap_soc_devices); 1107212f4f8aSKishon Vijay Abraham I if (soc) { 1108212f4f8aSKishon Vijay Abraham I omap_host->version = "rev11"; 1109212f4f8aSKishon Vijay Abraham I if (!strcmp(dev_name(dev), "4809c000.mmc")) 1110212f4f8aSKishon Vijay Abraham I mmc->f_max = 96000000; 1111212f4f8aSKishon Vijay Abraham I if (!strcmp(dev_name(dev), "480b4000.mmc")) 1112212f4f8aSKishon Vijay Abraham I mmc->f_max = 48000000; 1113212f4f8aSKishon Vijay Abraham I if (!strcmp(dev_name(dev), "480ad000.mmc")) 1114212f4f8aSKishon Vijay Abraham I mmc->f_max = 48000000; 1115212f4f8aSKishon Vijay Abraham I } 1116212f4f8aSKishon Vijay Abraham I 1117031d2cccSKishon Vijay Abraham I if (!mmc_can_gpio_ro(mmc)) 1118031d2cccSKishon Vijay Abraham I mmc->caps2 |= MMC_CAP2_NO_WRITE_PROTECT; 1119031d2cccSKishon Vijay Abraham I 11207d326930SKishon Vijay Abraham I pltfm_host->clk = devm_clk_get(dev, "fck"); 11217d326930SKishon Vijay Abraham I if (IS_ERR(pltfm_host->clk)) { 11227d326930SKishon Vijay Abraham I ret = PTR_ERR(pltfm_host->clk); 11237d326930SKishon Vijay Abraham I goto err_pltfm_free; 11247d326930SKishon Vijay Abraham I } 11257d326930SKishon Vijay Abraham I 11267d326930SKishon Vijay Abraham I ret = clk_set_rate(pltfm_host->clk, mmc->f_max); 11277d326930SKishon Vijay Abraham I if (ret) { 11287d326930SKishon Vijay Abraham I dev_err(dev, "failed to set clock to %d\n", mmc->f_max); 11297d326930SKishon Vijay Abraham I goto err_pltfm_free; 11307d326930SKishon Vijay Abraham I } 11317d326930SKishon Vijay Abraham I 11327d326930SKishon Vijay Abraham I omap_host->pbias = devm_regulator_get_optional(dev, "pbias"); 11337d326930SKishon Vijay Abraham I if (IS_ERR(omap_host->pbias)) { 11347d326930SKishon Vijay Abraham I ret = PTR_ERR(omap_host->pbias); 11357d326930SKishon Vijay Abraham I if (ret != -ENODEV) 11367d326930SKishon Vijay Abraham I goto err_pltfm_free; 11377d326930SKishon Vijay Abraham I dev_dbg(dev, "unable to get pbias regulator %d\n", ret); 11387d326930SKishon Vijay Abraham I } 11397d326930SKishon Vijay Abraham I omap_host->pbias_enabled = false; 11407d326930SKishon Vijay Abraham I 11417d326930SKishon Vijay Abraham I /* 11427d326930SKishon Vijay Abraham I * omap_device_pm_domain has callbacks to enable the main 11437d326930SKishon Vijay Abraham I * functional clock, interface clock and also configure the 11447d326930SKishon Vijay Abraham I * SYSCONFIG register of omap devices. The callback will be invoked 11457d326930SKishon Vijay Abraham I * as part of pm_runtime_get_sync. 11467d326930SKishon Vijay Abraham I */ 11477d326930SKishon Vijay Abraham I pm_runtime_enable(dev); 11487d326930SKishon Vijay Abraham I ret = pm_runtime_get_sync(dev); 11497d326930SKishon Vijay Abraham I if (ret < 0) { 11507d326930SKishon Vijay Abraham I dev_err(dev, "pm_runtime_get_sync failed\n"); 11517d326930SKishon Vijay Abraham I pm_runtime_put_noidle(dev); 11527d326930SKishon Vijay Abraham I goto err_rpm_disable; 11537d326930SKishon Vijay Abraham I } 11547d326930SKishon Vijay Abraham I 11557d326930SKishon Vijay Abraham I ret = sdhci_omap_set_capabilities(omap_host); 11567d326930SKishon Vijay Abraham I if (ret) { 11577d326930SKishon Vijay Abraham I dev_err(dev, "failed to set system capabilities\n"); 11587d326930SKishon Vijay Abraham I goto err_put_sync; 11597d326930SKishon Vijay Abraham I } 11607d326930SKishon Vijay Abraham I 11617d326930SKishon Vijay Abraham I host->mmc_host_ops.start_signal_voltage_switch = 11627d326930SKishon Vijay Abraham I sdhci_omap_start_signal_voltage_switch; 11637d326930SKishon Vijay Abraham I host->mmc_host_ops.set_ios = sdhci_omap_set_ios; 116420ea26a1SKishon Vijay Abraham I host->mmc_host_ops.card_busy = sdhci_omap_card_busy; 11659fc2cd76SKishon Vijay Abraham I host->mmc_host_ops.execute_tuning = sdhci_omap_execute_tuning; 1166efde12b2SKishon Vijay Abraham I host->mmc_host_ops.enable_sdio_irq = sdhci_omap_enable_sdio_irq; 11677d326930SKishon Vijay Abraham I 1168195fadb7SChunyan Zhang /* Switch to external DMA only if there is the "dmas" property */ 1169195fadb7SChunyan Zhang if (of_find_property(dev->of_node, "dmas", NULL)) 1170195fadb7SChunyan Zhang sdhci_switch_external_dma(host, true); 1171195fadb7SChunyan Zhang 11720ec4ee3cSKishon Vijay Abraham I ret = sdhci_setup_host(host); 11737d326930SKishon Vijay Abraham I if (ret) 11747d326930SKishon Vijay Abraham I goto err_put_sync; 11757d326930SKishon Vijay Abraham I 11760ec4ee3cSKishon Vijay Abraham I ret = sdhci_omap_config_iodelay_pinctrl_state(omap_host); 11770ec4ee3cSKishon Vijay Abraham I if (ret) 11780ec4ee3cSKishon Vijay Abraham I goto err_cleanup_host; 11790ec4ee3cSKishon Vijay Abraham I 11800ec4ee3cSKishon Vijay Abraham I ret = __sdhci_add_host(host); 11810ec4ee3cSKishon Vijay Abraham I if (ret) 11820ec4ee3cSKishon Vijay Abraham I goto err_cleanup_host; 11830ec4ee3cSKishon Vijay Abraham I 11847d326930SKishon Vijay Abraham I return 0; 11857d326930SKishon Vijay Abraham I 11860ec4ee3cSKishon Vijay Abraham I err_cleanup_host: 11870ec4ee3cSKishon Vijay Abraham I sdhci_cleanup_host(host); 11880ec4ee3cSKishon Vijay Abraham I 11897d326930SKishon Vijay Abraham I err_put_sync: 11907d326930SKishon Vijay Abraham I pm_runtime_put_sync(dev); 11917d326930SKishon Vijay Abraham I 11927d326930SKishon Vijay Abraham I err_rpm_disable: 11937d326930SKishon Vijay Abraham I pm_runtime_disable(dev); 11947d326930SKishon Vijay Abraham I 11957d326930SKishon Vijay Abraham I err_pltfm_free: 11967d326930SKishon Vijay Abraham I sdhci_pltfm_free(pdev); 11977d326930SKishon Vijay Abraham I return ret; 11987d326930SKishon Vijay Abraham I } 11997d326930SKishon Vijay Abraham I 12007d326930SKishon Vijay Abraham I static int sdhci_omap_remove(struct platform_device *pdev) 12017d326930SKishon Vijay Abraham I { 12027d326930SKishon Vijay Abraham I struct device *dev = &pdev->dev; 12037d326930SKishon Vijay Abraham I struct sdhci_host *host = platform_get_drvdata(pdev); 12047d326930SKishon Vijay Abraham I 12057d326930SKishon Vijay Abraham I sdhci_remove_host(host, true); 12067d326930SKishon Vijay Abraham I pm_runtime_put_sync(dev); 12077d326930SKishon Vijay Abraham I pm_runtime_disable(dev); 12087d326930SKishon Vijay Abraham I sdhci_pltfm_free(pdev); 12097d326930SKishon Vijay Abraham I 12107d326930SKishon Vijay Abraham I return 0; 12117d326930SKishon Vijay Abraham I } 12127d326930SKishon Vijay Abraham I 12137d326930SKishon Vijay Abraham I static struct platform_driver sdhci_omap_driver = { 12147d326930SKishon Vijay Abraham I .probe = sdhci_omap_probe, 12157d326930SKishon Vijay Abraham I .remove = sdhci_omap_remove, 12167d326930SKishon Vijay Abraham I .driver = { 12177d326930SKishon Vijay Abraham I .name = "sdhci-omap", 12187d326930SKishon Vijay Abraham I .of_match_table = omap_sdhci_match, 12197d326930SKishon Vijay Abraham I }, 12207d326930SKishon Vijay Abraham I }; 12217d326930SKishon Vijay Abraham I 12227d326930SKishon Vijay Abraham I module_platform_driver(sdhci_omap_driver); 12237d326930SKishon Vijay Abraham I 12247d326930SKishon Vijay Abraham I MODULE_DESCRIPTION("SDHCI driver for OMAP SoCs"); 12257d326930SKishon Vijay Abraham I MODULE_AUTHOR("Texas Instruments Inc."); 12267d326930SKishon Vijay Abraham I MODULE_LICENSE("GPL v2"); 12277d326930SKishon Vijay Abraham I MODULE_ALIAS("platform:sdhci_omap"); 1228