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 65*d806e334STony Lindgren #define SDHCI_OMAP_ISE 0x238 66*d806e334STony Lindgren 677d326930SKishon Vijay Abraham I #define SDHCI_OMAP_AC12 0x23c 687d326930SKishon Vijay Abraham I #define AC12_V1V8_SIGEN BIT(19) 699fc2cd76SKishon Vijay Abraham I #define AC12_SCLK_SEL BIT(23) 707d326930SKishon Vijay Abraham I 717d326930SKishon Vijay Abraham I #define SDHCI_OMAP_CAPA 0x240 727d326930SKishon Vijay Abraham I #define CAPA_VS33 BIT(24) 737d326930SKishon Vijay Abraham I #define CAPA_VS30 BIT(25) 747d326930SKishon Vijay Abraham I #define CAPA_VS18 BIT(26) 757d326930SKishon Vijay Abraham I 769fc2cd76SKishon Vijay Abraham I #define SDHCI_OMAP_CAPA2 0x0244 779fc2cd76SKishon Vijay Abraham I #define CAPA2_TSDR50 BIT(13) 789fc2cd76SKishon Vijay Abraham I 797d326930SKishon Vijay Abraham I #define SDHCI_OMAP_TIMEOUT 1 /* 1 msec */ 807d326930SKishon Vijay Abraham I 817d326930SKishon Vijay Abraham I #define SYSCTL_CLKD_MAX 0x3FF 827d326930SKishon Vijay Abraham I 837d326930SKishon Vijay Abraham I #define IOV_1V8 1800000 /* 180000 uV */ 847d326930SKishon Vijay Abraham I #define IOV_3V0 3000000 /* 300000 uV */ 857d326930SKishon Vijay Abraham I #define IOV_3V3 3300000 /* 330000 uV */ 867d326930SKishon Vijay Abraham I 879fc2cd76SKishon Vijay Abraham I #define MAX_PHASE_DELAY 0x7C 889fc2cd76SKishon Vijay Abraham I 898d20b2eaSKishon Vijay Abraham I /* sdhci-omap controller flags */ 908d20b2eaSKishon Vijay Abraham I #define SDHCI_OMAP_REQUIRE_IODELAY BIT(0) 919e84a2e6SFaiz Abbas #define SDHCI_OMAP_SPECIAL_RESET BIT(1) 928d20b2eaSKishon Vijay Abraham I 937d326930SKishon Vijay Abraham I struct sdhci_omap_data { 947d326930SKishon Vijay Abraham I u32 offset; 958d20b2eaSKishon Vijay Abraham I u8 flags; 967d326930SKishon Vijay Abraham I }; 977d326930SKishon Vijay Abraham I 987d326930SKishon Vijay Abraham I struct sdhci_omap_host { 99212f4f8aSKishon Vijay Abraham I char *version; 1007d326930SKishon Vijay Abraham I void __iomem *base; 1017d326930SKishon Vijay Abraham I struct device *dev; 1027d326930SKishon Vijay Abraham I struct regulator *pbias; 1037d326930SKishon Vijay Abraham I bool pbias_enabled; 1047d326930SKishon Vijay Abraham I struct sdhci_host *host; 1057d326930SKishon Vijay Abraham I u8 bus_mode; 1067d326930SKishon Vijay Abraham I u8 power_mode; 1078d20b2eaSKishon Vijay Abraham I u8 timing; 1088d20b2eaSKishon Vijay Abraham I u8 flags; 1098d20b2eaSKishon Vijay Abraham I 1108d20b2eaSKishon Vijay Abraham I struct pinctrl *pinctrl; 1118d20b2eaSKishon Vijay Abraham I struct pinctrl_state **pinctrl_state; 1125b0d6210SFaiz Abbas bool is_tuning; 113ee0f3092SFaiz Abbas /* Omap specific context save */ 114ee0f3092SFaiz Abbas u32 con; 115ee0f3092SFaiz Abbas u32 hctl; 116ee0f3092SFaiz Abbas u32 sysctl; 117ee0f3092SFaiz Abbas u32 capa; 118*d806e334STony Lindgren u32 ie; 119*d806e334STony Lindgren u32 ise; 1207d326930SKishon Vijay Abraham I }; 1217d326930SKishon Vijay Abraham I 1228d20b2eaSKishon Vijay Abraham I static void sdhci_omap_start_clock(struct sdhci_omap_host *omap_host); 1238d20b2eaSKishon Vijay Abraham I static void sdhci_omap_stop_clock(struct sdhci_omap_host *omap_host); 1248d20b2eaSKishon Vijay Abraham I 1257d326930SKishon Vijay Abraham I static inline u32 sdhci_omap_readl(struct sdhci_omap_host *host, 1267d326930SKishon Vijay Abraham I unsigned int offset) 1277d326930SKishon Vijay Abraham I { 1287d326930SKishon Vijay Abraham I return readl(host->base + offset); 1297d326930SKishon Vijay Abraham I } 1307d326930SKishon Vijay Abraham I 1317d326930SKishon Vijay Abraham I static inline void sdhci_omap_writel(struct sdhci_omap_host *host, 1327d326930SKishon Vijay Abraham I unsigned int offset, u32 data) 1337d326930SKishon Vijay Abraham I { 1347d326930SKishon Vijay Abraham I writel(data, host->base + offset); 1357d326930SKishon Vijay Abraham I } 1367d326930SKishon Vijay Abraham I 1377d326930SKishon Vijay Abraham I static int sdhci_omap_set_pbias(struct sdhci_omap_host *omap_host, 1387d326930SKishon Vijay Abraham I bool power_on, unsigned int iov) 1397d326930SKishon Vijay Abraham I { 1407d326930SKishon Vijay Abraham I int ret; 1417d326930SKishon Vijay Abraham I struct device *dev = omap_host->dev; 1427d326930SKishon Vijay Abraham I 1437d326930SKishon Vijay Abraham I if (IS_ERR(omap_host->pbias)) 1447d326930SKishon Vijay Abraham I return 0; 1457d326930SKishon Vijay Abraham I 1467d326930SKishon Vijay Abraham I if (power_on) { 1477d326930SKishon Vijay Abraham I ret = regulator_set_voltage(omap_host->pbias, iov, iov); 1487d326930SKishon Vijay Abraham I if (ret) { 1497d326930SKishon Vijay Abraham I dev_err(dev, "pbias set voltage failed\n"); 1507d326930SKishon Vijay Abraham I return ret; 1517d326930SKishon Vijay Abraham I } 1527d326930SKishon Vijay Abraham I 1537d326930SKishon Vijay Abraham I if (omap_host->pbias_enabled) 1547d326930SKishon Vijay Abraham I return 0; 1557d326930SKishon Vijay Abraham I 1567d326930SKishon Vijay Abraham I ret = regulator_enable(omap_host->pbias); 1577d326930SKishon Vijay Abraham I if (ret) { 1587d326930SKishon Vijay Abraham I dev_err(dev, "pbias reg enable fail\n"); 1597d326930SKishon Vijay Abraham I return ret; 1607d326930SKishon Vijay Abraham I } 1617d326930SKishon Vijay Abraham I 1627d326930SKishon Vijay Abraham I omap_host->pbias_enabled = true; 1637d326930SKishon Vijay Abraham I } else { 1647d326930SKishon Vijay Abraham I if (!omap_host->pbias_enabled) 1657d326930SKishon Vijay Abraham I return 0; 1667d326930SKishon Vijay Abraham I 1677d326930SKishon Vijay Abraham I ret = regulator_disable(omap_host->pbias); 1687d326930SKishon Vijay Abraham I if (ret) { 1697d326930SKishon Vijay Abraham I dev_err(dev, "pbias reg disable fail\n"); 1707d326930SKishon Vijay Abraham I return ret; 1717d326930SKishon Vijay Abraham I } 1727d326930SKishon Vijay Abraham I omap_host->pbias_enabled = false; 1737d326930SKishon Vijay Abraham I } 1747d326930SKishon Vijay Abraham I 1757d326930SKishon Vijay Abraham I return 0; 1767d326930SKishon Vijay Abraham I } 1777d326930SKishon Vijay Abraham I 1787d326930SKishon Vijay Abraham I static int sdhci_omap_enable_iov(struct sdhci_omap_host *omap_host, 1797d326930SKishon Vijay Abraham I unsigned int iov) 1807d326930SKishon Vijay Abraham I { 1817d326930SKishon Vijay Abraham I int ret; 1827d326930SKishon Vijay Abraham I struct sdhci_host *host = omap_host->host; 1837d326930SKishon Vijay Abraham I struct mmc_host *mmc = host->mmc; 1847d326930SKishon Vijay Abraham I 1857d326930SKishon Vijay Abraham I ret = sdhci_omap_set_pbias(omap_host, false, 0); 1867d326930SKishon Vijay Abraham I if (ret) 1877d326930SKishon Vijay Abraham I return ret; 1887d326930SKishon Vijay Abraham I 1897d326930SKishon Vijay Abraham I if (!IS_ERR(mmc->supply.vqmmc)) { 1907d326930SKishon Vijay Abraham I ret = regulator_set_voltage(mmc->supply.vqmmc, iov, iov); 1917d326930SKishon Vijay Abraham I if (ret) { 1927d326930SKishon Vijay Abraham I dev_err(mmc_dev(mmc), "vqmmc set voltage failed\n"); 1937d326930SKishon Vijay Abraham I return ret; 1947d326930SKishon Vijay Abraham I } 1957d326930SKishon Vijay Abraham I } 1967d326930SKishon Vijay Abraham I 1977d326930SKishon Vijay Abraham I ret = sdhci_omap_set_pbias(omap_host, true, iov); 1987d326930SKishon Vijay Abraham I if (ret) 1997d326930SKishon Vijay Abraham I return ret; 2007d326930SKishon Vijay Abraham I 2017d326930SKishon Vijay Abraham I return 0; 2027d326930SKishon Vijay Abraham I } 2037d326930SKishon Vijay Abraham I 2047d326930SKishon Vijay Abraham I static void sdhci_omap_conf_bus_power(struct sdhci_omap_host *omap_host, 2057d326930SKishon Vijay Abraham I unsigned char signal_voltage) 2067d326930SKishon Vijay Abraham I { 2077d326930SKishon Vijay Abraham I u32 reg; 2087d326930SKishon Vijay Abraham I ktime_t timeout; 2097d326930SKishon Vijay Abraham I 2107d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_HCTL); 2117d326930SKishon Vijay Abraham I reg &= ~HCTL_SDVS_MASK; 2127d326930SKishon Vijay Abraham I 2137d326930SKishon Vijay Abraham I if (signal_voltage == MMC_SIGNAL_VOLTAGE_330) 2147d326930SKishon Vijay Abraham I reg |= HCTL_SDVS_33; 2157d326930SKishon Vijay Abraham I else 2167d326930SKishon Vijay Abraham I reg |= HCTL_SDVS_18; 2177d326930SKishon Vijay Abraham I 2187d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_HCTL, reg); 2197d326930SKishon Vijay Abraham I 2207d326930SKishon Vijay Abraham I reg |= HCTL_SDBP; 2217d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_HCTL, reg); 2227d326930SKishon Vijay Abraham I 2237d326930SKishon Vijay Abraham I /* wait 1ms */ 2247d326930SKishon Vijay Abraham I timeout = ktime_add_ms(ktime_get(), SDHCI_OMAP_TIMEOUT); 2259f0ea0bdSAdrian Hunter while (1) { 2269f0ea0bdSAdrian Hunter bool timedout = ktime_after(ktime_get(), timeout); 2279f0ea0bdSAdrian Hunter 2289f0ea0bdSAdrian Hunter if (sdhci_omap_readl(omap_host, SDHCI_OMAP_HCTL) & HCTL_SDBP) 2299f0ea0bdSAdrian Hunter break; 2309f0ea0bdSAdrian Hunter if (WARN_ON(timedout)) 2317d326930SKishon Vijay Abraham I return; 2327d326930SKishon Vijay Abraham I usleep_range(5, 10); 2337d326930SKishon Vijay Abraham I } 2347d326930SKishon Vijay Abraham I } 2357d326930SKishon Vijay Abraham I 236efde12b2SKishon Vijay Abraham I static void sdhci_omap_enable_sdio_irq(struct mmc_host *mmc, int enable) 237efde12b2SKishon Vijay Abraham I { 238efde12b2SKishon Vijay Abraham I struct sdhci_host *host = mmc_priv(mmc); 239efde12b2SKishon Vijay Abraham I struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 240efde12b2SKishon Vijay Abraham I struct sdhci_omap_host *omap_host = sdhci_pltfm_priv(pltfm_host); 241efde12b2SKishon Vijay Abraham I u32 reg; 242efde12b2SKishon Vijay Abraham I 243efde12b2SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CON); 244efde12b2SKishon Vijay Abraham I if (enable) 245efde12b2SKishon Vijay Abraham I reg |= (CON_CTPL | CON_CLKEXTFREE); 246efde12b2SKishon Vijay Abraham I else 247efde12b2SKishon Vijay Abraham I reg &= ~(CON_CTPL | CON_CLKEXTFREE); 248efde12b2SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_CON, reg); 249efde12b2SKishon Vijay Abraham I 250efde12b2SKishon Vijay Abraham I sdhci_enable_sdio_irq(mmc, enable); 251efde12b2SKishon Vijay Abraham I } 252efde12b2SKishon Vijay Abraham I 2539fc2cd76SKishon Vijay Abraham I static inline void sdhci_omap_set_dll(struct sdhci_omap_host *omap_host, 2549fc2cd76SKishon Vijay Abraham I int count) 2559fc2cd76SKishon Vijay Abraham I { 2569fc2cd76SKishon Vijay Abraham I int i; 2579fc2cd76SKishon Vijay Abraham I u32 reg; 2589fc2cd76SKishon Vijay Abraham I 2599fc2cd76SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_DLL); 2609fc2cd76SKishon Vijay Abraham I reg |= DLL_FORCE_VALUE; 2619fc2cd76SKishon Vijay Abraham I reg &= ~DLL_FORCE_SR_C_MASK; 2629fc2cd76SKishon Vijay Abraham I reg |= (count << DLL_FORCE_SR_C_SHIFT); 2639fc2cd76SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_DLL, reg); 2649fc2cd76SKishon Vijay Abraham I 2659fc2cd76SKishon Vijay Abraham I reg |= DLL_CALIB; 2669fc2cd76SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_DLL, reg); 2679fc2cd76SKishon Vijay Abraham I for (i = 0; i < 1000; i++) { 2689fc2cd76SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_DLL); 2699fc2cd76SKishon Vijay Abraham I if (reg & DLL_CALIB) 2709fc2cd76SKishon Vijay Abraham I break; 2719fc2cd76SKishon Vijay Abraham I } 2729fc2cd76SKishon Vijay Abraham I reg &= ~DLL_CALIB; 2739fc2cd76SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_DLL, reg); 2749fc2cd76SKishon Vijay Abraham I } 2759fc2cd76SKishon Vijay Abraham I 2769fc2cd76SKishon Vijay Abraham I static void sdhci_omap_disable_tuning(struct sdhci_omap_host *omap_host) 2779fc2cd76SKishon Vijay Abraham I { 2789fc2cd76SKishon Vijay Abraham I u32 reg; 2799fc2cd76SKishon Vijay Abraham I 2809fc2cd76SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_AC12); 2819fc2cd76SKishon Vijay Abraham I reg &= ~AC12_SCLK_SEL; 2829fc2cd76SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_AC12, reg); 2839fc2cd76SKishon Vijay Abraham I 2849fc2cd76SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_DLL); 2859fc2cd76SKishon Vijay Abraham I reg &= ~(DLL_FORCE_VALUE | DLL_SWT); 2869fc2cd76SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_DLL, reg); 2879fc2cd76SKishon Vijay Abraham I } 2889fc2cd76SKishon Vijay Abraham I 2899fc2cd76SKishon Vijay Abraham I static int sdhci_omap_execute_tuning(struct mmc_host *mmc, u32 opcode) 2909fc2cd76SKishon Vijay Abraham I { 2919fc2cd76SKishon Vijay Abraham I struct sdhci_host *host = mmc_priv(mmc); 2929fc2cd76SKishon Vijay Abraham I struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 2939fc2cd76SKishon Vijay Abraham I struct sdhci_omap_host *omap_host = sdhci_pltfm_priv(pltfm_host); 294961de0a8SFaiz Abbas struct thermal_zone_device *thermal_dev; 2959fc2cd76SKishon Vijay Abraham I struct device *dev = omap_host->dev; 2969fc2cd76SKishon Vijay Abraham I struct mmc_ios *ios = &mmc->ios; 2979fc2cd76SKishon Vijay Abraham I u32 start_window = 0, max_window = 0; 298961de0a8SFaiz Abbas bool single_point_failure = false; 299db2039fcSFaiz Abbas bool dcrc_was_enabled = false; 3009fc2cd76SKishon Vijay Abraham I u8 cur_match, prev_match = 0; 3019fc2cd76SKishon Vijay Abraham I u32 length = 0, max_len = 0; 3029fc2cd76SKishon Vijay Abraham I u32 phase_delay = 0; 303961de0a8SFaiz Abbas int temperature; 3049fc2cd76SKishon Vijay Abraham I int ret = 0; 3059fc2cd76SKishon Vijay Abraham I u32 reg; 306961de0a8SFaiz Abbas int i; 3079fc2cd76SKishon Vijay Abraham I 3089fc2cd76SKishon Vijay Abraham I /* clock tuning is not needed for upto 52MHz */ 3099fc2cd76SKishon Vijay Abraham I if (ios->clock <= 52000000) 3109fc2cd76SKishon Vijay Abraham I return 0; 3119fc2cd76SKishon Vijay Abraham I 3129fc2cd76SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CAPA2); 3139fc2cd76SKishon Vijay Abraham I if (ios->timing == MMC_TIMING_UHS_SDR50 && !(reg & CAPA2_TSDR50)) 3149fc2cd76SKishon Vijay Abraham I return 0; 3159fc2cd76SKishon Vijay Abraham I 316961de0a8SFaiz Abbas thermal_dev = thermal_zone_get_zone_by_name("cpu_thermal"); 317961de0a8SFaiz Abbas if (IS_ERR(thermal_dev)) { 318961de0a8SFaiz Abbas dev_err(dev, "Unable to get thermal zone for tuning\n"); 319961de0a8SFaiz Abbas return PTR_ERR(thermal_dev); 320961de0a8SFaiz Abbas } 321961de0a8SFaiz Abbas 322961de0a8SFaiz Abbas ret = thermal_zone_get_temp(thermal_dev, &temperature); 323961de0a8SFaiz Abbas if (ret) 324961de0a8SFaiz Abbas return ret; 325961de0a8SFaiz Abbas 3269fc2cd76SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_DLL); 3279fc2cd76SKishon Vijay Abraham I reg |= DLL_SWT; 3289fc2cd76SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_DLL, reg); 3299fc2cd76SKishon Vijay Abraham I 3307d33c358SKishon Vijay Abraham I /* 3317d33c358SKishon Vijay Abraham I * OMAP5/DRA74X/DRA72x Errata i802: 3327d33c358SKishon Vijay Abraham I * DCRC error interrupts (MMCHS_STAT[21] DCRC=0x1) can occur 3337d33c358SKishon Vijay Abraham I * during the tuning procedure. So disable it during the 3347d33c358SKishon Vijay Abraham I * tuning procedure. 3357d33c358SKishon Vijay Abraham I */ 336db2039fcSFaiz Abbas if (host->ier & SDHCI_INT_DATA_CRC) { 337db2039fcSFaiz Abbas host->ier &= ~SDHCI_INT_DATA_CRC; 338db2039fcSFaiz Abbas dcrc_was_enabled = true; 339db2039fcSFaiz Abbas } 3407d33c358SKishon Vijay Abraham I 3415b0d6210SFaiz Abbas omap_host->is_tuning = true; 3425b0d6210SFaiz Abbas 343961de0a8SFaiz Abbas /* 344961de0a8SFaiz Abbas * Stage 1: Search for a maximum pass window ignoring any 345961de0a8SFaiz Abbas * any single point failures. If the tuning value ends up 346961de0a8SFaiz Abbas * near it, move away from it in stage 2 below 347961de0a8SFaiz Abbas */ 3489fc2cd76SKishon Vijay Abraham I while (phase_delay <= MAX_PHASE_DELAY) { 3499fc2cd76SKishon Vijay Abraham I sdhci_omap_set_dll(omap_host, phase_delay); 3509fc2cd76SKishon Vijay Abraham I 3519fc2cd76SKishon Vijay Abraham I cur_match = !mmc_send_tuning(mmc, opcode, NULL); 3529fc2cd76SKishon Vijay Abraham I if (cur_match) { 3539fc2cd76SKishon Vijay Abraham I if (prev_match) { 3549fc2cd76SKishon Vijay Abraham I length++; 355961de0a8SFaiz Abbas } else if (single_point_failure) { 356961de0a8SFaiz Abbas /* ignore single point failure */ 357961de0a8SFaiz Abbas length++; 3589fc2cd76SKishon Vijay Abraham I } else { 3599fc2cd76SKishon Vijay Abraham I start_window = phase_delay; 3609fc2cd76SKishon Vijay Abraham I length = 1; 3619fc2cd76SKishon Vijay Abraham I } 362961de0a8SFaiz Abbas } else { 363961de0a8SFaiz Abbas single_point_failure = prev_match; 3649fc2cd76SKishon Vijay Abraham I } 3659fc2cd76SKishon Vijay Abraham I 3669fc2cd76SKishon Vijay Abraham I if (length > max_len) { 3679fc2cd76SKishon Vijay Abraham I max_window = start_window; 3689fc2cd76SKishon Vijay Abraham I max_len = length; 3699fc2cd76SKishon Vijay Abraham I } 3709fc2cd76SKishon Vijay Abraham I 3719fc2cd76SKishon Vijay Abraham I prev_match = cur_match; 3729fc2cd76SKishon Vijay Abraham I phase_delay += 4; 3739fc2cd76SKishon Vijay Abraham I } 3749fc2cd76SKishon Vijay Abraham I 3759fc2cd76SKishon Vijay Abraham I if (!max_len) { 3769fc2cd76SKishon Vijay Abraham I dev_err(dev, "Unable to find match\n"); 3779fc2cd76SKishon Vijay Abraham I ret = -EIO; 3789fc2cd76SKishon Vijay Abraham I goto tuning_error; 3799fc2cd76SKishon Vijay Abraham I } 3809fc2cd76SKishon Vijay Abraham I 381961de0a8SFaiz Abbas /* 382961de0a8SFaiz Abbas * Assign tuning value as a ratio of maximum pass window based 383961de0a8SFaiz Abbas * on temperature 384961de0a8SFaiz Abbas */ 385961de0a8SFaiz Abbas if (temperature < -20000) 386feb40824SFaiz Abbas phase_delay = min(max_window + 4 * (max_len - 1) - 24, 387961de0a8SFaiz Abbas max_window + 388961de0a8SFaiz Abbas DIV_ROUND_UP(13 * max_len, 16) * 4); 389961de0a8SFaiz Abbas else if (temperature < 20000) 390961de0a8SFaiz Abbas phase_delay = max_window + DIV_ROUND_UP(9 * max_len, 16) * 4; 391961de0a8SFaiz Abbas else if (temperature < 40000) 392961de0a8SFaiz Abbas phase_delay = max_window + DIV_ROUND_UP(8 * max_len, 16) * 4; 393961de0a8SFaiz Abbas else if (temperature < 70000) 394961de0a8SFaiz Abbas phase_delay = max_window + DIV_ROUND_UP(7 * max_len, 16) * 4; 395961de0a8SFaiz Abbas else if (temperature < 90000) 396961de0a8SFaiz Abbas phase_delay = max_window + DIV_ROUND_UP(5 * max_len, 16) * 4; 397961de0a8SFaiz Abbas else if (temperature < 120000) 398961de0a8SFaiz Abbas phase_delay = max_window + DIV_ROUND_UP(4 * max_len, 16) * 4; 399961de0a8SFaiz Abbas else 400961de0a8SFaiz Abbas phase_delay = max_window + DIV_ROUND_UP(3 * max_len, 16) * 4; 401961de0a8SFaiz Abbas 402961de0a8SFaiz Abbas /* 403961de0a8SFaiz Abbas * Stage 2: Search for a single point failure near the chosen tuning 404961de0a8SFaiz Abbas * value in two steps. First in the +3 to +10 range and then in the 405961de0a8SFaiz Abbas * +2 to -10 range. If found, move away from it in the appropriate 406961de0a8SFaiz Abbas * direction by the appropriate amount depending on the temperature. 407961de0a8SFaiz Abbas */ 408961de0a8SFaiz Abbas for (i = 3; i <= 10; i++) { 409961de0a8SFaiz Abbas sdhci_omap_set_dll(omap_host, phase_delay + i); 410961de0a8SFaiz Abbas 411961de0a8SFaiz Abbas if (mmc_send_tuning(mmc, opcode, NULL)) { 412961de0a8SFaiz Abbas if (temperature < 10000) 413961de0a8SFaiz Abbas phase_delay += i + 6; 414961de0a8SFaiz Abbas else if (temperature < 20000) 415961de0a8SFaiz Abbas phase_delay += i - 12; 416961de0a8SFaiz Abbas else if (temperature < 70000) 417961de0a8SFaiz Abbas phase_delay += i - 8; 418961de0a8SFaiz Abbas else 419961de0a8SFaiz Abbas phase_delay += i - 6; 420961de0a8SFaiz Abbas 421961de0a8SFaiz Abbas goto single_failure_found; 422961de0a8SFaiz Abbas } 423961de0a8SFaiz Abbas } 424961de0a8SFaiz Abbas 425961de0a8SFaiz Abbas for (i = 2; i >= -10; i--) { 426961de0a8SFaiz Abbas sdhci_omap_set_dll(omap_host, phase_delay + i); 427961de0a8SFaiz Abbas 428961de0a8SFaiz Abbas if (mmc_send_tuning(mmc, opcode, NULL)) { 429961de0a8SFaiz Abbas if (temperature < 10000) 430961de0a8SFaiz Abbas phase_delay += i + 12; 431961de0a8SFaiz Abbas else if (temperature < 20000) 432961de0a8SFaiz Abbas phase_delay += i + 8; 433961de0a8SFaiz Abbas else if (temperature < 70000) 434961de0a8SFaiz Abbas phase_delay += i + 8; 435961de0a8SFaiz Abbas else if (temperature < 90000) 436961de0a8SFaiz Abbas phase_delay += i + 10; 437961de0a8SFaiz Abbas else 438961de0a8SFaiz Abbas phase_delay += i + 12; 439961de0a8SFaiz Abbas 440961de0a8SFaiz Abbas goto single_failure_found; 441961de0a8SFaiz Abbas } 442961de0a8SFaiz Abbas } 443961de0a8SFaiz Abbas 444961de0a8SFaiz Abbas single_failure_found: 4459fc2cd76SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_AC12); 4469fc2cd76SKishon Vijay Abraham I if (!(reg & AC12_SCLK_SEL)) { 4479fc2cd76SKishon Vijay Abraham I ret = -EIO; 4489fc2cd76SKishon Vijay Abraham I goto tuning_error; 4499fc2cd76SKishon Vijay Abraham I } 4509fc2cd76SKishon Vijay Abraham I 4519fc2cd76SKishon Vijay Abraham I sdhci_omap_set_dll(omap_host, phase_delay); 4529fc2cd76SKishon Vijay Abraham I 4535b0d6210SFaiz Abbas omap_host->is_tuning = false; 4545b0d6210SFaiz Abbas 4559fc2cd76SKishon Vijay Abraham I goto ret; 4569fc2cd76SKishon Vijay Abraham I 4579fc2cd76SKishon Vijay Abraham I tuning_error: 4585b0d6210SFaiz Abbas omap_host->is_tuning = false; 4599fc2cd76SKishon Vijay Abraham I dev_err(dev, "Tuning failed\n"); 4609fc2cd76SKishon Vijay Abraham I sdhci_omap_disable_tuning(omap_host); 4619fc2cd76SKishon Vijay Abraham I 4629fc2cd76SKishon Vijay Abraham I ret: 4639fc2cd76SKishon Vijay Abraham I sdhci_reset(host, SDHCI_RESET_CMD | SDHCI_RESET_DATA); 464db2039fcSFaiz Abbas /* Reenable forbidden interrupt */ 465db2039fcSFaiz Abbas if (dcrc_was_enabled) 466db2039fcSFaiz Abbas host->ier |= SDHCI_INT_DATA_CRC; 4677d33c358SKishon Vijay Abraham I sdhci_writel(host, host->ier, SDHCI_INT_ENABLE); 4687d33c358SKishon Vijay Abraham I sdhci_writel(host, host->ier, SDHCI_SIGNAL_ENABLE); 4699fc2cd76SKishon Vijay Abraham I return ret; 4709fc2cd76SKishon Vijay Abraham I } 4719fc2cd76SKishon Vijay Abraham I 47220ea26a1SKishon Vijay Abraham I static int sdhci_omap_card_busy(struct mmc_host *mmc) 47320ea26a1SKishon Vijay Abraham I { 47420ea26a1SKishon Vijay Abraham I u32 reg, ac12; 47520ea26a1SKishon Vijay Abraham I int ret = false; 47620ea26a1SKishon Vijay Abraham I struct sdhci_host *host = mmc_priv(mmc); 47720ea26a1SKishon Vijay Abraham I struct sdhci_pltfm_host *pltfm_host; 47820ea26a1SKishon Vijay Abraham I struct sdhci_omap_host *omap_host; 47920ea26a1SKishon Vijay Abraham I u32 ier = host->ier; 48020ea26a1SKishon Vijay Abraham I 48120ea26a1SKishon Vijay Abraham I pltfm_host = sdhci_priv(host); 48220ea26a1SKishon Vijay Abraham I omap_host = sdhci_pltfm_priv(pltfm_host); 48320ea26a1SKishon Vijay Abraham I 48420ea26a1SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CON); 48520ea26a1SKishon Vijay Abraham I ac12 = sdhci_omap_readl(omap_host, SDHCI_OMAP_AC12); 48620ea26a1SKishon Vijay Abraham I reg &= ~CON_CLKEXTFREE; 48720ea26a1SKishon Vijay Abraham I if (ac12 & AC12_V1V8_SIGEN) 48820ea26a1SKishon Vijay Abraham I reg |= CON_CLKEXTFREE; 48920ea26a1SKishon Vijay Abraham I reg |= CON_PADEN; 49020ea26a1SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_CON, reg); 49120ea26a1SKishon Vijay Abraham I 49220ea26a1SKishon Vijay Abraham I disable_irq(host->irq); 49320ea26a1SKishon Vijay Abraham I ier |= SDHCI_INT_CARD_INT; 49420ea26a1SKishon Vijay Abraham I sdhci_writel(host, ier, SDHCI_INT_ENABLE); 49520ea26a1SKishon Vijay Abraham I sdhci_writel(host, ier, SDHCI_SIGNAL_ENABLE); 49620ea26a1SKishon Vijay Abraham I 49720ea26a1SKishon Vijay Abraham I /* 49820ea26a1SKishon Vijay Abraham I * Delay is required for PSTATE to correctly reflect 49920ea26a1SKishon Vijay Abraham I * DLEV/CLEV values after PADEN is set. 50020ea26a1SKishon Vijay Abraham I */ 50120ea26a1SKishon Vijay Abraham I usleep_range(50, 100); 50220ea26a1SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_PSTATE); 50320ea26a1SKishon Vijay Abraham I if ((reg & PSTATE_DATI) || !(reg & PSTATE_DLEV_DAT0)) 50420ea26a1SKishon Vijay Abraham I ret = true; 50520ea26a1SKishon Vijay Abraham I 50620ea26a1SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CON); 50720ea26a1SKishon Vijay Abraham I reg &= ~(CON_CLKEXTFREE | CON_PADEN); 50820ea26a1SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_CON, reg); 50920ea26a1SKishon Vijay Abraham I 51020ea26a1SKishon Vijay Abraham I sdhci_writel(host, host->ier, SDHCI_INT_ENABLE); 51120ea26a1SKishon Vijay Abraham I sdhci_writel(host, host->ier, SDHCI_SIGNAL_ENABLE); 51220ea26a1SKishon Vijay Abraham I enable_irq(host->irq); 51320ea26a1SKishon Vijay Abraham I 51420ea26a1SKishon Vijay Abraham I return ret; 51520ea26a1SKishon Vijay Abraham I } 51620ea26a1SKishon Vijay Abraham I 5177d326930SKishon Vijay Abraham I static int sdhci_omap_start_signal_voltage_switch(struct mmc_host *mmc, 5187d326930SKishon Vijay Abraham I struct mmc_ios *ios) 5197d326930SKishon Vijay Abraham I { 5207d326930SKishon Vijay Abraham I u32 reg; 5217d326930SKishon Vijay Abraham I int ret; 5227d326930SKishon Vijay Abraham I unsigned int iov; 5237d326930SKishon Vijay Abraham I struct sdhci_host *host = mmc_priv(mmc); 5247d326930SKishon Vijay Abraham I struct sdhci_pltfm_host *pltfm_host; 5257d326930SKishon Vijay Abraham I struct sdhci_omap_host *omap_host; 5267d326930SKishon Vijay Abraham I struct device *dev; 5277d326930SKishon Vijay Abraham I 5287d326930SKishon Vijay Abraham I pltfm_host = sdhci_priv(host); 5297d326930SKishon Vijay Abraham I omap_host = sdhci_pltfm_priv(pltfm_host); 5307d326930SKishon Vijay Abraham I dev = omap_host->dev; 5317d326930SKishon Vijay Abraham I 5327d326930SKishon Vijay Abraham I if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_330) { 5337d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CAPA); 5347d326930SKishon Vijay Abraham I if (!(reg & CAPA_VS33)) 5357d326930SKishon Vijay Abraham I return -EOPNOTSUPP; 5367d326930SKishon Vijay Abraham I 5377d326930SKishon Vijay Abraham I sdhci_omap_conf_bus_power(omap_host, ios->signal_voltage); 5387d326930SKishon Vijay Abraham I 5397d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_AC12); 5407d326930SKishon Vijay Abraham I reg &= ~AC12_V1V8_SIGEN; 5417d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_AC12, reg); 5427d326930SKishon Vijay Abraham I 5437d326930SKishon Vijay Abraham I iov = IOV_3V3; 5447d326930SKishon Vijay Abraham I } else if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_180) { 5457d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CAPA); 5467d326930SKishon Vijay Abraham I if (!(reg & CAPA_VS18)) 5477d326930SKishon Vijay Abraham I return -EOPNOTSUPP; 5487d326930SKishon Vijay Abraham I 5497d326930SKishon Vijay Abraham I sdhci_omap_conf_bus_power(omap_host, ios->signal_voltage); 5507d326930SKishon Vijay Abraham I 5517d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_AC12); 5527d326930SKishon Vijay Abraham I reg |= AC12_V1V8_SIGEN; 5537d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_AC12, reg); 5547d326930SKishon Vijay Abraham I 5557d326930SKishon Vijay Abraham I iov = IOV_1V8; 5567d326930SKishon Vijay Abraham I } else { 5577d326930SKishon Vijay Abraham I return -EOPNOTSUPP; 5587d326930SKishon Vijay Abraham I } 5597d326930SKishon Vijay Abraham I 5607d326930SKishon Vijay Abraham I ret = sdhci_omap_enable_iov(omap_host, iov); 5617d326930SKishon Vijay Abraham I if (ret) { 5627d326930SKishon Vijay Abraham I dev_err(dev, "failed to switch IO voltage to %dmV\n", iov); 5637d326930SKishon Vijay Abraham I return ret; 5647d326930SKishon Vijay Abraham I } 5657d326930SKishon Vijay Abraham I 5667d326930SKishon Vijay Abraham I dev_dbg(dev, "IO voltage switched to %dmV\n", iov); 5677d326930SKishon Vijay Abraham I return 0; 5687d326930SKishon Vijay Abraham I } 5697d326930SKishon Vijay Abraham I 5708d20b2eaSKishon Vijay Abraham I static void sdhci_omap_set_timing(struct sdhci_omap_host *omap_host, u8 timing) 5718d20b2eaSKishon Vijay Abraham I { 5728d20b2eaSKishon Vijay Abraham I int ret; 5738d20b2eaSKishon Vijay Abraham I struct pinctrl_state *pinctrl_state; 5748d20b2eaSKishon Vijay Abraham I struct device *dev = omap_host->dev; 5758d20b2eaSKishon Vijay Abraham I 5768d20b2eaSKishon Vijay Abraham I if (!(omap_host->flags & SDHCI_OMAP_REQUIRE_IODELAY)) 5778d20b2eaSKishon Vijay Abraham I return; 5788d20b2eaSKishon Vijay Abraham I 5798d20b2eaSKishon Vijay Abraham I if (omap_host->timing == timing) 5808d20b2eaSKishon Vijay Abraham I return; 5818d20b2eaSKishon Vijay Abraham I 5828d20b2eaSKishon Vijay Abraham I sdhci_omap_stop_clock(omap_host); 5838d20b2eaSKishon Vijay Abraham I 5848d20b2eaSKishon Vijay Abraham I pinctrl_state = omap_host->pinctrl_state[timing]; 5858d20b2eaSKishon Vijay Abraham I ret = pinctrl_select_state(omap_host->pinctrl, pinctrl_state); 5868d20b2eaSKishon Vijay Abraham I if (ret) { 5878d20b2eaSKishon Vijay Abraham I dev_err(dev, "failed to select pinctrl state\n"); 5888d20b2eaSKishon Vijay Abraham I return; 5898d20b2eaSKishon Vijay Abraham I } 5908d20b2eaSKishon Vijay Abraham I 5918d20b2eaSKishon Vijay Abraham I sdhci_omap_start_clock(omap_host); 5928d20b2eaSKishon Vijay Abraham I omap_host->timing = timing; 5938d20b2eaSKishon Vijay Abraham I } 5948d20b2eaSKishon Vijay Abraham I 595300df508SKishon Vijay Abraham I static void sdhci_omap_set_power_mode(struct sdhci_omap_host *omap_host, 596300df508SKishon Vijay Abraham I u8 power_mode) 597300df508SKishon Vijay Abraham I { 5989fc2cd76SKishon Vijay Abraham I if (omap_host->bus_mode == MMC_POWER_OFF) 5999fc2cd76SKishon Vijay Abraham I sdhci_omap_disable_tuning(omap_host); 600300df508SKishon Vijay Abraham I omap_host->power_mode = power_mode; 601300df508SKishon Vijay Abraham I } 602300df508SKishon Vijay Abraham I 6037d326930SKishon Vijay Abraham I static void sdhci_omap_set_bus_mode(struct sdhci_omap_host *omap_host, 6047d326930SKishon Vijay Abraham I unsigned int mode) 6057d326930SKishon Vijay Abraham I { 6067d326930SKishon Vijay Abraham I u32 reg; 6077d326930SKishon Vijay Abraham I 6087d326930SKishon Vijay Abraham I if (omap_host->bus_mode == mode) 6097d326930SKishon Vijay Abraham I return; 6107d326930SKishon Vijay Abraham I 6117d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CON); 6127d326930SKishon Vijay Abraham I if (mode == MMC_BUSMODE_OPENDRAIN) 6137d326930SKishon Vijay Abraham I reg |= CON_OD; 6147d326930SKishon Vijay Abraham I else 6157d326930SKishon Vijay Abraham I reg &= ~CON_OD; 6167d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_CON, reg); 6177d326930SKishon Vijay Abraham I 6187d326930SKishon Vijay Abraham I omap_host->bus_mode = mode; 6197d326930SKishon Vijay Abraham I } 6207d326930SKishon Vijay Abraham I 621ddde0e7dSColin Ian King static void sdhci_omap_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) 6227d326930SKishon Vijay Abraham I { 6237d326930SKishon Vijay Abraham I struct sdhci_host *host = mmc_priv(mmc); 6247d326930SKishon Vijay Abraham I struct sdhci_pltfm_host *pltfm_host; 6257d326930SKishon Vijay Abraham I struct sdhci_omap_host *omap_host; 6267d326930SKishon Vijay Abraham I 6277d326930SKishon Vijay Abraham I pltfm_host = sdhci_priv(host); 6287d326930SKishon Vijay Abraham I omap_host = sdhci_pltfm_priv(pltfm_host); 6297d326930SKishon Vijay Abraham I 6307d326930SKishon Vijay Abraham I sdhci_omap_set_bus_mode(omap_host, ios->bus_mode); 6318d20b2eaSKishon Vijay Abraham I sdhci_omap_set_timing(omap_host, ios->timing); 6327d326930SKishon Vijay Abraham I sdhci_set_ios(mmc, ios); 633300df508SKishon Vijay Abraham I sdhci_omap_set_power_mode(omap_host, ios->power_mode); 6347d326930SKishon Vijay Abraham I } 6357d326930SKishon Vijay Abraham I 6367d326930SKishon Vijay Abraham I static u16 sdhci_omap_calc_divisor(struct sdhci_pltfm_host *host, 6377d326930SKishon Vijay Abraham I unsigned int clock) 6387d326930SKishon Vijay Abraham I { 6397d326930SKishon Vijay Abraham I u16 dsor; 6407d326930SKishon Vijay Abraham I 6417d326930SKishon Vijay Abraham I dsor = DIV_ROUND_UP(clk_get_rate(host->clk), clock); 6427d326930SKishon Vijay Abraham I if (dsor > SYSCTL_CLKD_MAX) 6437d326930SKishon Vijay Abraham I dsor = SYSCTL_CLKD_MAX; 6447d326930SKishon Vijay Abraham I 6457d326930SKishon Vijay Abraham I return dsor; 6467d326930SKishon Vijay Abraham I } 6477d326930SKishon Vijay Abraham I 6487d326930SKishon Vijay Abraham I static void sdhci_omap_start_clock(struct sdhci_omap_host *omap_host) 6497d326930SKishon Vijay Abraham I { 6507d326930SKishon Vijay Abraham I u32 reg; 6517d326930SKishon Vijay Abraham I 6527d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_SYSCTL); 6537d326930SKishon Vijay Abraham I reg |= SYSCTL_CEN; 6547d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_SYSCTL, reg); 6557d326930SKishon Vijay Abraham I } 6567d326930SKishon Vijay Abraham I 6577d326930SKishon Vijay Abraham I static void sdhci_omap_stop_clock(struct sdhci_omap_host *omap_host) 6587d326930SKishon Vijay Abraham I { 6597d326930SKishon Vijay Abraham I u32 reg; 6607d326930SKishon Vijay Abraham I 6617d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_SYSCTL); 6627d326930SKishon Vijay Abraham I reg &= ~SYSCTL_CEN; 6637d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_SYSCTL, reg); 6647d326930SKishon Vijay Abraham I } 6657d326930SKishon Vijay Abraham I 6667d326930SKishon Vijay Abraham I static void sdhci_omap_set_clock(struct sdhci_host *host, unsigned int clock) 6677d326930SKishon Vijay Abraham I { 6687d326930SKishon Vijay Abraham I struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 6697d326930SKishon Vijay Abraham I struct sdhci_omap_host *omap_host = sdhci_pltfm_priv(pltfm_host); 6707d326930SKishon Vijay Abraham I unsigned long clkdiv; 6717d326930SKishon Vijay Abraham I 6727d326930SKishon Vijay Abraham I sdhci_omap_stop_clock(omap_host); 6737d326930SKishon Vijay Abraham I 6747d326930SKishon Vijay Abraham I if (!clock) 6757d326930SKishon Vijay Abraham I return; 6767d326930SKishon Vijay Abraham I 6777d326930SKishon Vijay Abraham I clkdiv = sdhci_omap_calc_divisor(pltfm_host, clock); 6787d326930SKishon Vijay Abraham I clkdiv = (clkdiv & SYSCTL_CLKD_MASK) << SYSCTL_CLKD_SHIFT; 6797d326930SKishon Vijay Abraham I sdhci_enable_clk(host, clkdiv); 6807d326930SKishon Vijay Abraham I 6817d326930SKishon Vijay Abraham I sdhci_omap_start_clock(omap_host); 6827d326930SKishon Vijay Abraham I } 6837d326930SKishon Vijay Abraham I 684ddde0e7dSColin Ian King static void sdhci_omap_set_power(struct sdhci_host *host, unsigned char mode, 6857d326930SKishon Vijay Abraham I unsigned short vdd) 6867d326930SKishon Vijay Abraham I { 6877d326930SKishon Vijay Abraham I struct mmc_host *mmc = host->mmc; 6887d326930SKishon Vijay Abraham I 6898e0e7bd3STony Lindgren if (!IS_ERR(mmc->supply.vmmc)) 6907d326930SKishon Vijay Abraham I mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, vdd); 6917d326930SKishon Vijay Abraham I } 6927d326930SKishon Vijay Abraham I 6937d326930SKishon Vijay Abraham I static int sdhci_omap_enable_dma(struct sdhci_host *host) 6947d326930SKishon Vijay Abraham I { 6957d326930SKishon Vijay Abraham I u32 reg; 6967d326930SKishon Vijay Abraham I struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 6977d326930SKishon Vijay Abraham I struct sdhci_omap_host *omap_host = sdhci_pltfm_priv(pltfm_host); 6987d326930SKishon Vijay Abraham I 6997d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CON); 700195fadb7SChunyan Zhang reg &= ~CON_DMA_MASTER; 701195fadb7SChunyan Zhang /* Switch to DMA slave mode when using external DMA */ 702195fadb7SChunyan Zhang if (!host->use_external_dma) 7037d326930SKishon Vijay Abraham I reg |= CON_DMA_MASTER; 704195fadb7SChunyan Zhang 7057d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_CON, reg); 7067d326930SKishon Vijay Abraham I 7077d326930SKishon Vijay Abraham I return 0; 7087d326930SKishon Vijay Abraham I } 7097d326930SKishon Vijay Abraham I 710ddde0e7dSColin Ian King static unsigned int sdhci_omap_get_min_clock(struct sdhci_host *host) 7117d326930SKishon Vijay Abraham I { 7127d326930SKishon Vijay Abraham I struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 7137d326930SKishon Vijay Abraham I 7147d326930SKishon Vijay Abraham I return clk_get_rate(pltfm_host->clk) / SYSCTL_CLKD_MAX; 7157d326930SKishon Vijay Abraham I } 7167d326930SKishon Vijay Abraham I 7177d326930SKishon Vijay Abraham I static void sdhci_omap_set_bus_width(struct sdhci_host *host, int width) 7187d326930SKishon Vijay Abraham I { 7197d326930SKishon Vijay Abraham I struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 7207d326930SKishon Vijay Abraham I struct sdhci_omap_host *omap_host = sdhci_pltfm_priv(pltfm_host); 7217d326930SKishon Vijay Abraham I u32 reg; 7227d326930SKishon Vijay Abraham I 7237d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CON); 7247d326930SKishon Vijay Abraham I if (width == MMC_BUS_WIDTH_8) 7257d326930SKishon Vijay Abraham I reg |= CON_DW8; 7267d326930SKishon Vijay Abraham I else 7277d326930SKishon Vijay Abraham I reg &= ~CON_DW8; 7287d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_CON, reg); 7297d326930SKishon Vijay Abraham I 7307d326930SKishon Vijay Abraham I sdhci_set_bus_width(host, width); 7317d326930SKishon Vijay Abraham I } 7327d326930SKishon Vijay Abraham I 7337d326930SKishon Vijay Abraham I static void sdhci_omap_init_74_clocks(struct sdhci_host *host, u8 power_mode) 7347d326930SKishon Vijay Abraham I { 7357d326930SKishon Vijay Abraham I u32 reg; 7367d326930SKishon Vijay Abraham I ktime_t timeout; 7377d326930SKishon Vijay Abraham I struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 7387d326930SKishon Vijay Abraham I struct sdhci_omap_host *omap_host = sdhci_pltfm_priv(pltfm_host); 7397d326930SKishon Vijay Abraham I 7407d326930SKishon Vijay Abraham I if (omap_host->power_mode == power_mode) 7417d326930SKishon Vijay Abraham I return; 7427d326930SKishon Vijay Abraham I 7437d326930SKishon Vijay Abraham I if (power_mode != MMC_POWER_ON) 7447d326930SKishon Vijay Abraham I return; 7457d326930SKishon Vijay Abraham I 7467d326930SKishon Vijay Abraham I disable_irq(host->irq); 7477d326930SKishon Vijay Abraham I 7487d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CON); 7497d326930SKishon Vijay Abraham I reg |= CON_INIT; 7507d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_CON, reg); 7517d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_CMD, 0x0); 7527d326930SKishon Vijay Abraham I 7537d326930SKishon Vijay Abraham I /* wait 1ms */ 7547d326930SKishon Vijay Abraham I timeout = ktime_add_ms(ktime_get(), SDHCI_OMAP_TIMEOUT); 7559f0ea0bdSAdrian Hunter while (1) { 7569f0ea0bdSAdrian Hunter bool timedout = ktime_after(ktime_get(), timeout); 7579f0ea0bdSAdrian Hunter 7589f0ea0bdSAdrian Hunter if (sdhci_omap_readl(omap_host, SDHCI_OMAP_STAT) & INT_CC_EN) 7599f0ea0bdSAdrian Hunter break; 7609f0ea0bdSAdrian Hunter if (WARN_ON(timedout)) 7617d326930SKishon Vijay Abraham I return; 7627d326930SKishon Vijay Abraham I usleep_range(5, 10); 7637d326930SKishon Vijay Abraham I } 7647d326930SKishon Vijay Abraham I 7657d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CON); 7667d326930SKishon Vijay Abraham I reg &= ~CON_INIT; 7677d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_CON, reg); 7687d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_STAT, INT_CC_EN); 7697d326930SKishon Vijay Abraham I 7707d326930SKishon Vijay Abraham I enable_irq(host->irq); 7717d326930SKishon Vijay Abraham I } 7727d326930SKishon Vijay Abraham I 77327ceb7e0SKishon Vijay Abraham I static void sdhci_omap_set_uhs_signaling(struct sdhci_host *host, 77427ceb7e0SKishon Vijay Abraham I unsigned int timing) 77527ceb7e0SKishon Vijay Abraham I { 77627ceb7e0SKishon Vijay Abraham I u32 reg; 77727ceb7e0SKishon Vijay Abraham I struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 77827ceb7e0SKishon Vijay Abraham I struct sdhci_omap_host *omap_host = sdhci_pltfm_priv(pltfm_host); 77927ceb7e0SKishon Vijay Abraham I 78027ceb7e0SKishon Vijay Abraham I sdhci_omap_stop_clock(omap_host); 78127ceb7e0SKishon Vijay Abraham I 78227ceb7e0SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CON); 78327ceb7e0SKishon Vijay Abraham I if (timing == MMC_TIMING_UHS_DDR50 || timing == MMC_TIMING_MMC_DDR52) 78427ceb7e0SKishon Vijay Abraham I reg |= CON_DDR; 78527ceb7e0SKishon Vijay Abraham I else 78627ceb7e0SKishon Vijay Abraham I reg &= ~CON_DDR; 78727ceb7e0SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_CON, reg); 78827ceb7e0SKishon Vijay Abraham I 78927ceb7e0SKishon Vijay Abraham I sdhci_set_uhs_signaling(host, timing); 79027ceb7e0SKishon Vijay Abraham I sdhci_omap_start_clock(omap_host); 79127ceb7e0SKishon Vijay Abraham I } 79227ceb7e0SKishon Vijay Abraham I 7939e84a2e6SFaiz Abbas #define MMC_TIMEOUT_US 20000 /* 20000 micro Sec */ 7942198eeffSYueHaibing static void sdhci_omap_reset(struct sdhci_host *host, u8 mask) 7955b0d6210SFaiz Abbas { 7965b0d6210SFaiz Abbas struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 7975b0d6210SFaiz Abbas struct sdhci_omap_host *omap_host = sdhci_pltfm_priv(pltfm_host); 7989e84a2e6SFaiz Abbas unsigned long limit = MMC_TIMEOUT_US; 7999e84a2e6SFaiz Abbas unsigned long i = 0; 8005b0d6210SFaiz Abbas 8015b0d6210SFaiz Abbas /* Don't reset data lines during tuning operation */ 8025b0d6210SFaiz Abbas if (omap_host->is_tuning) 8035b0d6210SFaiz Abbas mask &= ~SDHCI_RESET_DATA; 8045b0d6210SFaiz Abbas 8059e84a2e6SFaiz Abbas if (omap_host->flags & SDHCI_OMAP_SPECIAL_RESET) { 8069e84a2e6SFaiz Abbas sdhci_writeb(host, mask, SDHCI_SOFTWARE_RESET); 8079e84a2e6SFaiz Abbas while ((!(sdhci_readb(host, SDHCI_SOFTWARE_RESET) & mask)) && 8089e84a2e6SFaiz Abbas (i++ < limit)) 8099e84a2e6SFaiz Abbas udelay(1); 8109e84a2e6SFaiz Abbas i = 0; 8119e84a2e6SFaiz Abbas while ((sdhci_readb(host, SDHCI_SOFTWARE_RESET) & mask) && 8129e84a2e6SFaiz Abbas (i++ < limit)) 8139e84a2e6SFaiz Abbas udelay(1); 8149e84a2e6SFaiz Abbas 8159e84a2e6SFaiz Abbas if (sdhci_readb(host, SDHCI_SOFTWARE_RESET) & mask) 8169e84a2e6SFaiz Abbas dev_err(mmc_dev(host->mmc), 8179e84a2e6SFaiz Abbas "Timeout waiting on controller reset in %s\n", 8189e84a2e6SFaiz Abbas __func__); 8199e84a2e6SFaiz Abbas return; 8209e84a2e6SFaiz Abbas } 8219e84a2e6SFaiz Abbas 8225b0d6210SFaiz Abbas sdhci_reset(host, mask); 8235b0d6210SFaiz Abbas } 8245b0d6210SFaiz Abbas 8255c41ea6dSFaiz Abbas #define CMD_ERR_MASK (SDHCI_INT_CRC | SDHCI_INT_END_BIT | SDHCI_INT_INDEX |\ 8265c41ea6dSFaiz Abbas SDHCI_INT_TIMEOUT) 8275c41ea6dSFaiz Abbas #define CMD_MASK (CMD_ERR_MASK | SDHCI_INT_RESPONSE) 8285c41ea6dSFaiz Abbas 8295c41ea6dSFaiz Abbas static u32 sdhci_omap_irq(struct sdhci_host *host, u32 intmask) 8305c41ea6dSFaiz Abbas { 8315c41ea6dSFaiz Abbas struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 8325c41ea6dSFaiz Abbas struct sdhci_omap_host *omap_host = sdhci_pltfm_priv(pltfm_host); 8335c41ea6dSFaiz Abbas 8345c41ea6dSFaiz Abbas if (omap_host->is_tuning && host->cmd && !host->data_early && 8355c41ea6dSFaiz Abbas (intmask & CMD_ERR_MASK)) { 8365c41ea6dSFaiz Abbas 8375c41ea6dSFaiz Abbas /* 8385c41ea6dSFaiz Abbas * Since we are not resetting data lines during tuning 8395c41ea6dSFaiz Abbas * operation, data error or data complete interrupts 8405c41ea6dSFaiz Abbas * might still arrive. Mark this request as a failure 8415c41ea6dSFaiz Abbas * but still wait for the data interrupt 8425c41ea6dSFaiz Abbas */ 8435c41ea6dSFaiz Abbas if (intmask & SDHCI_INT_TIMEOUT) 8445c41ea6dSFaiz Abbas host->cmd->error = -ETIMEDOUT; 8455c41ea6dSFaiz Abbas else 8465c41ea6dSFaiz Abbas host->cmd->error = -EILSEQ; 8475c41ea6dSFaiz Abbas 8485c41ea6dSFaiz Abbas host->cmd = NULL; 8495c41ea6dSFaiz Abbas 8505c41ea6dSFaiz Abbas /* 8515c41ea6dSFaiz Abbas * Sometimes command error interrupts and command complete 8525c41ea6dSFaiz Abbas * interrupt will arrive together. Clear all command related 8535c41ea6dSFaiz Abbas * interrupts here. 8545c41ea6dSFaiz Abbas */ 8555c41ea6dSFaiz Abbas sdhci_writel(host, intmask & CMD_MASK, SDHCI_INT_STATUS); 8565c41ea6dSFaiz Abbas intmask &= ~CMD_MASK; 8575c41ea6dSFaiz Abbas } 8585c41ea6dSFaiz Abbas 8595c41ea6dSFaiz Abbas return intmask; 8605c41ea6dSFaiz Abbas } 8615c41ea6dSFaiz Abbas 8625da5e494SFaiz Abbas static void sdhci_omap_set_timeout(struct sdhci_host *host, 8635da5e494SFaiz Abbas struct mmc_command *cmd) 8645da5e494SFaiz Abbas { 8655da5e494SFaiz Abbas if (cmd->opcode == MMC_ERASE) 8665da5e494SFaiz Abbas sdhci_set_data_timeout_irq(host, false); 8675da5e494SFaiz Abbas 8685da5e494SFaiz Abbas __sdhci_set_timeout(host, cmd); 8695da5e494SFaiz Abbas } 8705da5e494SFaiz Abbas 8717d326930SKishon Vijay Abraham I static struct sdhci_ops sdhci_omap_ops = { 8727d326930SKishon Vijay Abraham I .set_clock = sdhci_omap_set_clock, 8737d326930SKishon Vijay Abraham I .set_power = sdhci_omap_set_power, 8747d326930SKishon Vijay Abraham I .enable_dma = sdhci_omap_enable_dma, 8757d326930SKishon Vijay Abraham I .get_max_clock = sdhci_pltfm_clk_get_max_clock, 8767d326930SKishon Vijay Abraham I .get_min_clock = sdhci_omap_get_min_clock, 8777d326930SKishon Vijay Abraham I .set_bus_width = sdhci_omap_set_bus_width, 8787d326930SKishon Vijay Abraham I .platform_send_init_74_clocks = sdhci_omap_init_74_clocks, 8795b0d6210SFaiz Abbas .reset = sdhci_omap_reset, 88027ceb7e0SKishon Vijay Abraham I .set_uhs_signaling = sdhci_omap_set_uhs_signaling, 8815c41ea6dSFaiz Abbas .irq = sdhci_omap_irq, 8825da5e494SFaiz Abbas .set_timeout = sdhci_omap_set_timeout, 8837d326930SKishon Vijay Abraham I }; 8847d326930SKishon Vijay Abraham I 8857d326930SKishon Vijay Abraham I static int sdhci_omap_set_capabilities(struct sdhci_omap_host *omap_host) 8867d326930SKishon Vijay Abraham I { 8877d326930SKishon Vijay Abraham I u32 reg; 8887d326930SKishon Vijay Abraham I int ret = 0; 8897d326930SKishon Vijay Abraham I struct device *dev = omap_host->dev; 8907d326930SKishon Vijay Abraham I struct regulator *vqmmc; 8917d326930SKishon Vijay Abraham I 8927d326930SKishon Vijay Abraham I vqmmc = regulator_get(dev, "vqmmc"); 8937d326930SKishon Vijay Abraham I if (IS_ERR(vqmmc)) { 8947d326930SKishon Vijay Abraham I ret = PTR_ERR(vqmmc); 8957d326930SKishon Vijay Abraham I goto reg_put; 8967d326930SKishon Vijay Abraham I } 8977d326930SKishon Vijay Abraham I 8987d326930SKishon Vijay Abraham I /* voltage capabilities might be set by boot loader, clear it */ 8997d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CAPA); 9007d326930SKishon Vijay Abraham I reg &= ~(CAPA_VS18 | CAPA_VS30 | CAPA_VS33); 9017d326930SKishon Vijay Abraham I 9027d326930SKishon Vijay Abraham I if (regulator_is_supported_voltage(vqmmc, IOV_3V3, IOV_3V3)) 9037d326930SKishon Vijay Abraham I reg |= CAPA_VS33; 9047d326930SKishon Vijay Abraham I if (regulator_is_supported_voltage(vqmmc, IOV_1V8, IOV_1V8)) 9057d326930SKishon Vijay Abraham I reg |= CAPA_VS18; 9067d326930SKishon Vijay Abraham I 9077d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_CAPA, reg); 9087d326930SKishon Vijay Abraham I 9097d326930SKishon Vijay Abraham I reg_put: 9107d326930SKishon Vijay Abraham I regulator_put(vqmmc); 9117d326930SKishon Vijay Abraham I 9127d326930SKishon Vijay Abraham I return ret; 9137d326930SKishon Vijay Abraham I } 9147d326930SKishon Vijay Abraham I 9157d326930SKishon Vijay Abraham I static const struct sdhci_pltfm_data sdhci_omap_pdata = { 9167d326930SKishon Vijay Abraham I .quirks = SDHCI_QUIRK_BROKEN_CARD_DETECTION | 9177d326930SKishon Vijay Abraham I SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK | 9187d326930SKishon Vijay Abraham I SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN | 9197d326930SKishon Vijay Abraham I SDHCI_QUIRK_NO_HISPD_BIT | 9207d326930SKishon Vijay Abraham I SDHCI_QUIRK_BROKEN_ADMA_ZEROLEN_DESC, 921e0b2dbcfSKishon Vijay Abraham I .quirks2 = SDHCI_QUIRK2_ACMD23_BROKEN | 922e0b2dbcfSKishon Vijay Abraham I SDHCI_QUIRK2_PRESET_VALUE_BROKEN | 92325f80d86SKishon Vijay Abraham I SDHCI_QUIRK2_RSP_136_HAS_CRC | 92425f80d86SKishon Vijay Abraham I SDHCI_QUIRK2_DISABLE_HW_TIMEOUT, 9257d326930SKishon Vijay Abraham I .ops = &sdhci_omap_ops, 9267d326930SKishon Vijay Abraham I }; 9277d326930SKishon Vijay Abraham I 9286d75df75SKishon Vijay Abraham I static const struct sdhci_omap_data k2g_data = { 9296d75df75SKishon Vijay Abraham I .offset = 0x200, 9306d75df75SKishon Vijay Abraham I }; 9316d75df75SKishon Vijay Abraham I 932d6fe4928SFaiz Abbas static const struct sdhci_omap_data am335_data = { 933d6fe4928SFaiz Abbas .offset = 0x200, 9349e84a2e6SFaiz Abbas .flags = SDHCI_OMAP_SPECIAL_RESET, 935d6fe4928SFaiz Abbas }; 936d6fe4928SFaiz Abbas 937d6fe4928SFaiz Abbas static const struct sdhci_omap_data am437_data = { 938d6fe4928SFaiz Abbas .offset = 0x200, 9399e84a2e6SFaiz Abbas .flags = SDHCI_OMAP_SPECIAL_RESET, 940d6fe4928SFaiz Abbas }; 941d6fe4928SFaiz Abbas 9427d326930SKishon Vijay Abraham I static const struct sdhci_omap_data dra7_data = { 9437d326930SKishon Vijay Abraham I .offset = 0x200, 9448d20b2eaSKishon Vijay Abraham I .flags = SDHCI_OMAP_REQUIRE_IODELAY, 9457d326930SKishon Vijay Abraham I }; 9467d326930SKishon Vijay Abraham I 9477d326930SKishon Vijay Abraham I static const struct of_device_id omap_sdhci_match[] = { 9487d326930SKishon Vijay Abraham I { .compatible = "ti,dra7-sdhci", .data = &dra7_data }, 9496d75df75SKishon Vijay Abraham I { .compatible = "ti,k2g-sdhci", .data = &k2g_data }, 950d6fe4928SFaiz Abbas { .compatible = "ti,am335-sdhci", .data = &am335_data }, 951d6fe4928SFaiz Abbas { .compatible = "ti,am437-sdhci", .data = &am437_data }, 9527d326930SKishon Vijay Abraham I {}, 9537d326930SKishon Vijay Abraham I }; 9547d326930SKishon Vijay Abraham I MODULE_DEVICE_TABLE(of, omap_sdhci_match); 9557d326930SKishon Vijay Abraham I 9568d20b2eaSKishon Vijay Abraham I static struct pinctrl_state 9578d20b2eaSKishon Vijay Abraham I *sdhci_omap_iodelay_pinctrl_state(struct sdhci_omap_host *omap_host, char *mode, 9588d20b2eaSKishon Vijay Abraham I u32 *caps, u32 capmask) 9598d20b2eaSKishon Vijay Abraham I { 9608d20b2eaSKishon Vijay Abraham I struct device *dev = omap_host->dev; 961212f4f8aSKishon Vijay Abraham I char *version = omap_host->version; 9628d20b2eaSKishon Vijay Abraham I struct pinctrl_state *pinctrl_state = ERR_PTR(-ENODEV); 963212f4f8aSKishon Vijay Abraham I char str[20]; 9648d20b2eaSKishon Vijay Abraham I 9658d20b2eaSKishon Vijay Abraham I if (!(*caps & capmask)) 9668d20b2eaSKishon Vijay Abraham I goto ret; 9678d20b2eaSKishon Vijay Abraham I 968212f4f8aSKishon Vijay Abraham I if (version) { 969212f4f8aSKishon Vijay Abraham I snprintf(str, 20, "%s-%s", mode, version); 970212f4f8aSKishon Vijay Abraham I pinctrl_state = pinctrl_lookup_state(omap_host->pinctrl, str); 971212f4f8aSKishon Vijay Abraham I } 972212f4f8aSKishon Vijay Abraham I 973212f4f8aSKishon Vijay Abraham I if (IS_ERR(pinctrl_state)) 9748d20b2eaSKishon Vijay Abraham I pinctrl_state = pinctrl_lookup_state(omap_host->pinctrl, mode); 975212f4f8aSKishon Vijay Abraham I 9768d20b2eaSKishon Vijay Abraham I if (IS_ERR(pinctrl_state)) { 9778d20b2eaSKishon Vijay Abraham I dev_err(dev, "no pinctrl state for %s mode", mode); 9788d20b2eaSKishon Vijay Abraham I *caps &= ~capmask; 9798d20b2eaSKishon Vijay Abraham I } 9808d20b2eaSKishon Vijay Abraham I 9818d20b2eaSKishon Vijay Abraham I ret: 9828d20b2eaSKishon Vijay Abraham I return pinctrl_state; 9838d20b2eaSKishon Vijay Abraham I } 9848d20b2eaSKishon Vijay Abraham I 9858d20b2eaSKishon Vijay Abraham I static int sdhci_omap_config_iodelay_pinctrl_state(struct sdhci_omap_host 9868d20b2eaSKishon Vijay Abraham I *omap_host) 9878d20b2eaSKishon Vijay Abraham I { 9888d20b2eaSKishon Vijay Abraham I struct device *dev = omap_host->dev; 9898d20b2eaSKishon Vijay Abraham I struct sdhci_host *host = omap_host->host; 9908d20b2eaSKishon Vijay Abraham I struct mmc_host *mmc = host->mmc; 9918d20b2eaSKishon Vijay Abraham I u32 *caps = &mmc->caps; 9928d20b2eaSKishon Vijay Abraham I u32 *caps2 = &mmc->caps2; 9938d20b2eaSKishon Vijay Abraham I struct pinctrl_state *state; 9948d20b2eaSKishon Vijay Abraham I struct pinctrl_state **pinctrl_state; 9958d20b2eaSKishon Vijay Abraham I 9968d20b2eaSKishon Vijay Abraham I if (!(omap_host->flags & SDHCI_OMAP_REQUIRE_IODELAY)) 9978d20b2eaSKishon Vijay Abraham I return 0; 9988d20b2eaSKishon Vijay Abraham I 999a86854d0SKees Cook pinctrl_state = devm_kcalloc(dev, 1000a86854d0SKees Cook MMC_TIMING_MMC_HS200 + 1, 1001a86854d0SKees Cook sizeof(*pinctrl_state), 1002a86854d0SKees Cook GFP_KERNEL); 10038d20b2eaSKishon Vijay Abraham I if (!pinctrl_state) 10048d20b2eaSKishon Vijay Abraham I return -ENOMEM; 10058d20b2eaSKishon Vijay Abraham I 10068d20b2eaSKishon Vijay Abraham I omap_host->pinctrl = devm_pinctrl_get(omap_host->dev); 10078d20b2eaSKishon Vijay Abraham I if (IS_ERR(omap_host->pinctrl)) { 10088d20b2eaSKishon Vijay Abraham I dev_err(dev, "Cannot get pinctrl\n"); 10098d20b2eaSKishon Vijay Abraham I return PTR_ERR(omap_host->pinctrl); 10108d20b2eaSKishon Vijay Abraham I } 10118d20b2eaSKishon Vijay Abraham I 10128d20b2eaSKishon Vijay Abraham I state = pinctrl_lookup_state(omap_host->pinctrl, "default"); 10138d20b2eaSKishon Vijay Abraham I if (IS_ERR(state)) { 10148d20b2eaSKishon Vijay Abraham I dev_err(dev, "no pinctrl state for default mode\n"); 10158d20b2eaSKishon Vijay Abraham I return PTR_ERR(state); 10168d20b2eaSKishon Vijay Abraham I } 10178d20b2eaSKishon Vijay Abraham I pinctrl_state[MMC_TIMING_LEGACY] = state; 10188d20b2eaSKishon Vijay Abraham I 10198d20b2eaSKishon Vijay Abraham I state = sdhci_omap_iodelay_pinctrl_state(omap_host, "sdr104", caps, 10208d20b2eaSKishon Vijay Abraham I MMC_CAP_UHS_SDR104); 10218d20b2eaSKishon Vijay Abraham I if (!IS_ERR(state)) 10228d20b2eaSKishon Vijay Abraham I pinctrl_state[MMC_TIMING_UHS_SDR104] = state; 10238d20b2eaSKishon Vijay Abraham I 10248d20b2eaSKishon Vijay Abraham I state = sdhci_omap_iodelay_pinctrl_state(omap_host, "ddr50", caps, 10258d20b2eaSKishon Vijay Abraham I MMC_CAP_UHS_DDR50); 10268d20b2eaSKishon Vijay Abraham I if (!IS_ERR(state)) 10278d20b2eaSKishon Vijay Abraham I pinctrl_state[MMC_TIMING_UHS_DDR50] = state; 10288d20b2eaSKishon Vijay Abraham I 10298d20b2eaSKishon Vijay Abraham I state = sdhci_omap_iodelay_pinctrl_state(omap_host, "sdr50", caps, 10308d20b2eaSKishon Vijay Abraham I MMC_CAP_UHS_SDR50); 10318d20b2eaSKishon Vijay Abraham I if (!IS_ERR(state)) 10328d20b2eaSKishon Vijay Abraham I pinctrl_state[MMC_TIMING_UHS_SDR50] = state; 10338d20b2eaSKishon Vijay Abraham I 10348d20b2eaSKishon Vijay Abraham I state = sdhci_omap_iodelay_pinctrl_state(omap_host, "sdr25", caps, 10358d20b2eaSKishon Vijay Abraham I MMC_CAP_UHS_SDR25); 10368d20b2eaSKishon Vijay Abraham I if (!IS_ERR(state)) 10378d20b2eaSKishon Vijay Abraham I pinctrl_state[MMC_TIMING_UHS_SDR25] = state; 10388d20b2eaSKishon Vijay Abraham I 10398d20b2eaSKishon Vijay Abraham I state = sdhci_omap_iodelay_pinctrl_state(omap_host, "sdr12", caps, 10408d20b2eaSKishon Vijay Abraham I MMC_CAP_UHS_SDR12); 10418d20b2eaSKishon Vijay Abraham I if (!IS_ERR(state)) 10428d20b2eaSKishon Vijay Abraham I pinctrl_state[MMC_TIMING_UHS_SDR12] = state; 10438d20b2eaSKishon Vijay Abraham I 10448d20b2eaSKishon Vijay Abraham I state = sdhci_omap_iodelay_pinctrl_state(omap_host, "ddr_1_8v", caps, 10458d20b2eaSKishon Vijay Abraham I MMC_CAP_1_8V_DDR); 10463f402878SKishon Vijay Abraham I if (!IS_ERR(state)) { 10473f402878SKishon Vijay Abraham I pinctrl_state[MMC_TIMING_MMC_DDR52] = state; 10483f402878SKishon Vijay Abraham I } else { 10493f402878SKishon Vijay Abraham I state = sdhci_omap_iodelay_pinctrl_state(omap_host, "ddr_3_3v", 10503f402878SKishon Vijay Abraham I caps, 10513f402878SKishon Vijay Abraham I MMC_CAP_3_3V_DDR); 10528d20b2eaSKishon Vijay Abraham I if (!IS_ERR(state)) 10538d20b2eaSKishon Vijay Abraham I pinctrl_state[MMC_TIMING_MMC_DDR52] = state; 10543f402878SKishon Vijay Abraham I } 10558d20b2eaSKishon Vijay Abraham I 10568d20b2eaSKishon Vijay Abraham I state = sdhci_omap_iodelay_pinctrl_state(omap_host, "hs", caps, 10578d20b2eaSKishon Vijay Abraham I MMC_CAP_SD_HIGHSPEED); 10588d20b2eaSKishon Vijay Abraham I if (!IS_ERR(state)) 10598d20b2eaSKishon Vijay Abraham I pinctrl_state[MMC_TIMING_SD_HS] = state; 10608d20b2eaSKishon Vijay Abraham I 10618d20b2eaSKishon Vijay Abraham I state = sdhci_omap_iodelay_pinctrl_state(omap_host, "hs", caps, 10628d20b2eaSKishon Vijay Abraham I MMC_CAP_MMC_HIGHSPEED); 10638d20b2eaSKishon Vijay Abraham I if (!IS_ERR(state)) 10648d20b2eaSKishon Vijay Abraham I pinctrl_state[MMC_TIMING_MMC_HS] = state; 10658d20b2eaSKishon Vijay Abraham I 10668d20b2eaSKishon Vijay Abraham I state = sdhci_omap_iodelay_pinctrl_state(omap_host, "hs200_1_8v", caps2, 10678d20b2eaSKishon Vijay Abraham I MMC_CAP2_HS200_1_8V_SDR); 10688d20b2eaSKishon Vijay Abraham I if (!IS_ERR(state)) 10698d20b2eaSKishon Vijay Abraham I pinctrl_state[MMC_TIMING_MMC_HS200] = state; 10708d20b2eaSKishon Vijay Abraham I 10718d20b2eaSKishon Vijay Abraham I omap_host->pinctrl_state = pinctrl_state; 10728d20b2eaSKishon Vijay Abraham I 10738d20b2eaSKishon Vijay Abraham I return 0; 10748d20b2eaSKishon Vijay Abraham I } 10758d20b2eaSKishon Vijay Abraham I 1076212f4f8aSKishon Vijay Abraham I static const struct soc_device_attribute sdhci_omap_soc_devices[] = { 1077212f4f8aSKishon Vijay Abraham I { 1078212f4f8aSKishon Vijay Abraham I .machine = "DRA7[45]*", 1079212f4f8aSKishon Vijay Abraham I .revision = "ES1.[01]", 1080212f4f8aSKishon Vijay Abraham I }, 1081212f4f8aSKishon Vijay Abraham I { 1082212f4f8aSKishon Vijay Abraham I /* sentinel */ 1083212f4f8aSKishon Vijay Abraham I } 1084212f4f8aSKishon Vijay Abraham I }; 1085212f4f8aSKishon Vijay Abraham I 10867d326930SKishon Vijay Abraham I static int sdhci_omap_probe(struct platform_device *pdev) 10877d326930SKishon Vijay Abraham I { 10887d326930SKishon Vijay Abraham I int ret; 10897d326930SKishon Vijay Abraham I u32 offset; 10907d326930SKishon Vijay Abraham I struct device *dev = &pdev->dev; 10917d326930SKishon Vijay Abraham I struct sdhci_host *host; 10927d326930SKishon Vijay Abraham I struct sdhci_pltfm_host *pltfm_host; 10937d326930SKishon Vijay Abraham I struct sdhci_omap_host *omap_host; 10947d326930SKishon Vijay Abraham I struct mmc_host *mmc; 10957d326930SKishon Vijay Abraham I const struct of_device_id *match; 10967d326930SKishon Vijay Abraham I struct sdhci_omap_data *data; 1097212f4f8aSKishon Vijay Abraham I const struct soc_device_attribute *soc; 1098195fadb7SChunyan Zhang struct resource *regs; 10997d326930SKishon Vijay Abraham I 11007d326930SKishon Vijay Abraham I match = of_match_device(omap_sdhci_match, dev); 11017d326930SKishon Vijay Abraham I if (!match) 11027d326930SKishon Vijay Abraham I return -EINVAL; 11037d326930SKishon Vijay Abraham I 11047d326930SKishon Vijay Abraham I data = (struct sdhci_omap_data *)match->data; 11057d326930SKishon Vijay Abraham I if (!data) { 11067d326930SKishon Vijay Abraham I dev_err(dev, "no sdhci omap data\n"); 11077d326930SKishon Vijay Abraham I return -EINVAL; 11087d326930SKishon Vijay Abraham I } 11097d326930SKishon Vijay Abraham I offset = data->offset; 11107d326930SKishon Vijay Abraham I 1111195fadb7SChunyan Zhang regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); 1112195fadb7SChunyan Zhang if (!regs) 1113195fadb7SChunyan Zhang return -ENXIO; 1114195fadb7SChunyan Zhang 11157d326930SKishon Vijay Abraham I host = sdhci_pltfm_init(pdev, &sdhci_omap_pdata, 11167d326930SKishon Vijay Abraham I sizeof(*omap_host)); 11177d326930SKishon Vijay Abraham I if (IS_ERR(host)) { 11187d326930SKishon Vijay Abraham I dev_err(dev, "Failed sdhci_pltfm_init\n"); 11197d326930SKishon Vijay Abraham I return PTR_ERR(host); 11207d326930SKishon Vijay Abraham I } 11217d326930SKishon Vijay Abraham I 11227d326930SKishon Vijay Abraham I pltfm_host = sdhci_priv(host); 11237d326930SKishon Vijay Abraham I omap_host = sdhci_pltfm_priv(pltfm_host); 11247d326930SKishon Vijay Abraham I omap_host->host = host; 11257d326930SKishon Vijay Abraham I omap_host->base = host->ioaddr; 11267d326930SKishon Vijay Abraham I omap_host->dev = dev; 1127300df508SKishon Vijay Abraham I omap_host->power_mode = MMC_POWER_UNDEFINED; 11288d20b2eaSKishon Vijay Abraham I omap_host->timing = MMC_TIMING_LEGACY; 11298d20b2eaSKishon Vijay Abraham I omap_host->flags = data->flags; 11307d326930SKishon Vijay Abraham I host->ioaddr += offset; 1131195fadb7SChunyan Zhang host->mapbase = regs->start + offset; 11327d326930SKishon Vijay Abraham I 11337d326930SKishon Vijay Abraham I mmc = host->mmc; 11341d3a2220SKishon Vijay Abraham I sdhci_get_of_property(pdev); 11357d326930SKishon Vijay Abraham I ret = mmc_of_parse(mmc); 11367d326930SKishon Vijay Abraham I if (ret) 11377d326930SKishon Vijay Abraham I goto err_pltfm_free; 11387d326930SKishon Vijay Abraham I 1139212f4f8aSKishon Vijay Abraham I soc = soc_device_match(sdhci_omap_soc_devices); 1140212f4f8aSKishon Vijay Abraham I if (soc) { 1141212f4f8aSKishon Vijay Abraham I omap_host->version = "rev11"; 1142212f4f8aSKishon Vijay Abraham I if (!strcmp(dev_name(dev), "4809c000.mmc")) 1143212f4f8aSKishon Vijay Abraham I mmc->f_max = 96000000; 1144212f4f8aSKishon Vijay Abraham I if (!strcmp(dev_name(dev), "480b4000.mmc")) 1145212f4f8aSKishon Vijay Abraham I mmc->f_max = 48000000; 1146212f4f8aSKishon Vijay Abraham I if (!strcmp(dev_name(dev), "480ad000.mmc")) 1147212f4f8aSKishon Vijay Abraham I mmc->f_max = 48000000; 1148212f4f8aSKishon Vijay Abraham I } 1149212f4f8aSKishon Vijay Abraham I 1150031d2cccSKishon Vijay Abraham I if (!mmc_can_gpio_ro(mmc)) 1151031d2cccSKishon Vijay Abraham I mmc->caps2 |= MMC_CAP2_NO_WRITE_PROTECT; 1152031d2cccSKishon Vijay Abraham I 11537d326930SKishon Vijay Abraham I pltfm_host->clk = devm_clk_get(dev, "fck"); 11547d326930SKishon Vijay Abraham I if (IS_ERR(pltfm_host->clk)) { 11557d326930SKishon Vijay Abraham I ret = PTR_ERR(pltfm_host->clk); 11567d326930SKishon Vijay Abraham I goto err_pltfm_free; 11577d326930SKishon Vijay Abraham I } 11587d326930SKishon Vijay Abraham I 11597d326930SKishon Vijay Abraham I ret = clk_set_rate(pltfm_host->clk, mmc->f_max); 11607d326930SKishon Vijay Abraham I if (ret) { 11617d326930SKishon Vijay Abraham I dev_err(dev, "failed to set clock to %d\n", mmc->f_max); 11627d326930SKishon Vijay Abraham I goto err_pltfm_free; 11637d326930SKishon Vijay Abraham I } 11647d326930SKishon Vijay Abraham I 11657d326930SKishon Vijay Abraham I omap_host->pbias = devm_regulator_get_optional(dev, "pbias"); 11667d326930SKishon Vijay Abraham I if (IS_ERR(omap_host->pbias)) { 11677d326930SKishon Vijay Abraham I ret = PTR_ERR(omap_host->pbias); 11687d326930SKishon Vijay Abraham I if (ret != -ENODEV) 11697d326930SKishon Vijay Abraham I goto err_pltfm_free; 11707d326930SKishon Vijay Abraham I dev_dbg(dev, "unable to get pbias regulator %d\n", ret); 11717d326930SKishon Vijay Abraham I } 11727d326930SKishon Vijay Abraham I omap_host->pbias_enabled = false; 11737d326930SKishon Vijay Abraham I 11747d326930SKishon Vijay Abraham I /* 11757d326930SKishon Vijay Abraham I * omap_device_pm_domain has callbacks to enable the main 11767d326930SKishon Vijay Abraham I * functional clock, interface clock and also configure the 11777d326930SKishon Vijay Abraham I * SYSCONFIG register of omap devices. The callback will be invoked 11787d326930SKishon Vijay Abraham I * as part of pm_runtime_get_sync. 11797d326930SKishon Vijay Abraham I */ 11807d326930SKishon Vijay Abraham I pm_runtime_enable(dev); 1181809ae4e1STian Tao ret = pm_runtime_resume_and_get(dev); 1182809ae4e1STian Tao if (ret) { 11837d326930SKishon Vijay Abraham I dev_err(dev, "pm_runtime_get_sync failed\n"); 11847d326930SKishon Vijay Abraham I goto err_rpm_disable; 11857d326930SKishon Vijay Abraham I } 11867d326930SKishon Vijay Abraham I 11877d326930SKishon Vijay Abraham I ret = sdhci_omap_set_capabilities(omap_host); 11887d326930SKishon Vijay Abraham I if (ret) { 11897d326930SKishon Vijay Abraham I dev_err(dev, "failed to set system capabilities\n"); 11907d326930SKishon Vijay Abraham I goto err_put_sync; 11917d326930SKishon Vijay Abraham I } 11927d326930SKishon Vijay Abraham I 11937d326930SKishon Vijay Abraham I host->mmc_host_ops.start_signal_voltage_switch = 11947d326930SKishon Vijay Abraham I sdhci_omap_start_signal_voltage_switch; 11957d326930SKishon Vijay Abraham I host->mmc_host_ops.set_ios = sdhci_omap_set_ios; 119620ea26a1SKishon Vijay Abraham I host->mmc_host_ops.card_busy = sdhci_omap_card_busy; 11979fc2cd76SKishon Vijay Abraham I host->mmc_host_ops.execute_tuning = sdhci_omap_execute_tuning; 1198efde12b2SKishon Vijay Abraham I host->mmc_host_ops.enable_sdio_irq = sdhci_omap_enable_sdio_irq; 11997d326930SKishon Vijay Abraham I 1200195fadb7SChunyan Zhang /* Switch to external DMA only if there is the "dmas" property */ 1201195fadb7SChunyan Zhang if (of_find_property(dev->of_node, "dmas", NULL)) 1202195fadb7SChunyan Zhang sdhci_switch_external_dma(host, true); 1203195fadb7SChunyan Zhang 1204055e0483SUlf Hansson /* R1B responses is required to properly manage HW busy detection. */ 1205055e0483SUlf Hansson mmc->caps |= MMC_CAP_NEED_RSP_BUSY; 1206055e0483SUlf Hansson 12070ec4ee3cSKishon Vijay Abraham I ret = sdhci_setup_host(host); 12087d326930SKishon Vijay Abraham I if (ret) 12097d326930SKishon Vijay Abraham I goto err_put_sync; 12107d326930SKishon Vijay Abraham I 12110ec4ee3cSKishon Vijay Abraham I ret = sdhci_omap_config_iodelay_pinctrl_state(omap_host); 12120ec4ee3cSKishon Vijay Abraham I if (ret) 12130ec4ee3cSKishon Vijay Abraham I goto err_cleanup_host; 12140ec4ee3cSKishon Vijay Abraham I 12150ec4ee3cSKishon Vijay Abraham I ret = __sdhci_add_host(host); 12160ec4ee3cSKishon Vijay Abraham I if (ret) 12170ec4ee3cSKishon Vijay Abraham I goto err_cleanup_host; 12180ec4ee3cSKishon Vijay Abraham I 12197d326930SKishon Vijay Abraham I return 0; 12207d326930SKishon Vijay Abraham I 12210ec4ee3cSKishon Vijay Abraham I err_cleanup_host: 12220ec4ee3cSKishon Vijay Abraham I sdhci_cleanup_host(host); 12230ec4ee3cSKishon Vijay Abraham I 12247d326930SKishon Vijay Abraham I err_put_sync: 12257d326930SKishon Vijay Abraham I pm_runtime_put_sync(dev); 12267d326930SKishon Vijay Abraham I 12277d326930SKishon Vijay Abraham I err_rpm_disable: 12287d326930SKishon Vijay Abraham I pm_runtime_disable(dev); 12297d326930SKishon Vijay Abraham I 12307d326930SKishon Vijay Abraham I err_pltfm_free: 12317d326930SKishon Vijay Abraham I sdhci_pltfm_free(pdev); 12327d326930SKishon Vijay Abraham I return ret; 12337d326930SKishon Vijay Abraham I } 12347d326930SKishon Vijay Abraham I 12357d326930SKishon Vijay Abraham I static int sdhci_omap_remove(struct platform_device *pdev) 12367d326930SKishon Vijay Abraham I { 12377d326930SKishon Vijay Abraham I struct device *dev = &pdev->dev; 12387d326930SKishon Vijay Abraham I struct sdhci_host *host = platform_get_drvdata(pdev); 12397d326930SKishon Vijay Abraham I 12407d326930SKishon Vijay Abraham I sdhci_remove_host(host, true); 12417d326930SKishon Vijay Abraham I pm_runtime_put_sync(dev); 12427d326930SKishon Vijay Abraham I pm_runtime_disable(dev); 12437d326930SKishon Vijay Abraham I sdhci_pltfm_free(pdev); 12447d326930SKishon Vijay Abraham I 12457d326930SKishon Vijay Abraham I return 0; 12467d326930SKishon Vijay Abraham I } 1247ee0f3092SFaiz Abbas #ifdef CONFIG_PM_SLEEP 1248ee0f3092SFaiz Abbas static void sdhci_omap_context_save(struct sdhci_omap_host *omap_host) 1249ee0f3092SFaiz Abbas { 1250ee0f3092SFaiz Abbas omap_host->con = sdhci_omap_readl(omap_host, SDHCI_OMAP_CON); 1251ee0f3092SFaiz Abbas omap_host->hctl = sdhci_omap_readl(omap_host, SDHCI_OMAP_HCTL); 1252*d806e334STony Lindgren omap_host->sysctl = sdhci_omap_readl(omap_host, SDHCI_OMAP_SYSCTL); 1253ee0f3092SFaiz Abbas omap_host->capa = sdhci_omap_readl(omap_host, SDHCI_OMAP_CAPA); 1254*d806e334STony Lindgren omap_host->ie = sdhci_omap_readl(omap_host, SDHCI_OMAP_IE); 1255*d806e334STony Lindgren omap_host->ise = sdhci_omap_readl(omap_host, SDHCI_OMAP_ISE); 1256ee0f3092SFaiz Abbas } 1257ee0f3092SFaiz Abbas 1258*d806e334STony Lindgren /* Order matters here, HCTL must be restored in two phases */ 1259ee0f3092SFaiz Abbas static void sdhci_omap_context_restore(struct sdhci_omap_host *omap_host) 1260ee0f3092SFaiz Abbas { 1261ee0f3092SFaiz Abbas sdhci_omap_writel(omap_host, SDHCI_OMAP_HCTL, omap_host->hctl); 1262ee0f3092SFaiz Abbas sdhci_omap_writel(omap_host, SDHCI_OMAP_CAPA, omap_host->capa); 1263*d806e334STony Lindgren sdhci_omap_writel(omap_host, SDHCI_OMAP_HCTL, omap_host->hctl); 1264*d806e334STony Lindgren 1265*d806e334STony Lindgren sdhci_omap_writel(omap_host, SDHCI_OMAP_SYSCTL, omap_host->sysctl); 1266*d806e334STony Lindgren sdhci_omap_writel(omap_host, SDHCI_OMAP_CON, omap_host->con); 1267*d806e334STony Lindgren sdhci_omap_writel(omap_host, SDHCI_OMAP_IE, omap_host->ie); 1268*d806e334STony Lindgren sdhci_omap_writel(omap_host, SDHCI_OMAP_ISE, omap_host->ise); 1269ee0f3092SFaiz Abbas } 1270ee0f3092SFaiz Abbas 1271ee0f3092SFaiz Abbas static int __maybe_unused sdhci_omap_suspend(struct device *dev) 1272ee0f3092SFaiz Abbas { 1273ee0f3092SFaiz Abbas struct sdhci_host *host = dev_get_drvdata(dev); 1274ee0f3092SFaiz Abbas struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 1275ee0f3092SFaiz Abbas struct sdhci_omap_host *omap_host = sdhci_pltfm_priv(pltfm_host); 1276ee0f3092SFaiz Abbas 1277ee0f3092SFaiz Abbas sdhci_suspend_host(host); 1278ee0f3092SFaiz Abbas 1279ee0f3092SFaiz Abbas sdhci_omap_context_save(omap_host); 1280ee0f3092SFaiz Abbas 1281ee0f3092SFaiz Abbas pinctrl_pm_select_idle_state(dev); 1282ee0f3092SFaiz Abbas 1283ee0f3092SFaiz Abbas pm_runtime_force_suspend(dev); 1284ee0f3092SFaiz Abbas 1285ee0f3092SFaiz Abbas return 0; 1286ee0f3092SFaiz Abbas } 1287ee0f3092SFaiz Abbas 1288ee0f3092SFaiz Abbas static int __maybe_unused sdhci_omap_resume(struct device *dev) 1289ee0f3092SFaiz Abbas { 1290ee0f3092SFaiz Abbas struct sdhci_host *host = dev_get_drvdata(dev); 1291ee0f3092SFaiz Abbas struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 1292ee0f3092SFaiz Abbas struct sdhci_omap_host *omap_host = sdhci_pltfm_priv(pltfm_host); 1293ee0f3092SFaiz Abbas 1294ee0f3092SFaiz Abbas pm_runtime_force_resume(dev); 1295ee0f3092SFaiz Abbas 1296ee0f3092SFaiz Abbas pinctrl_pm_select_default_state(dev); 1297ee0f3092SFaiz Abbas 1298ee0f3092SFaiz Abbas sdhci_omap_context_restore(omap_host); 1299ee0f3092SFaiz Abbas 1300ee0f3092SFaiz Abbas sdhci_resume_host(host); 1301ee0f3092SFaiz Abbas 1302ee0f3092SFaiz Abbas return 0; 1303ee0f3092SFaiz Abbas } 1304ee0f3092SFaiz Abbas #endif 1305ee0f3092SFaiz Abbas static SIMPLE_DEV_PM_OPS(sdhci_omap_dev_pm_ops, sdhci_omap_suspend, 1306ee0f3092SFaiz Abbas sdhci_omap_resume); 13077d326930SKishon Vijay Abraham I 13087d326930SKishon Vijay Abraham I static struct platform_driver sdhci_omap_driver = { 13097d326930SKishon Vijay Abraham I .probe = sdhci_omap_probe, 13107d326930SKishon Vijay Abraham I .remove = sdhci_omap_remove, 13117d326930SKishon Vijay Abraham I .driver = { 13127d326930SKishon Vijay Abraham I .name = "sdhci-omap", 1313a1a48919SDouglas Anderson .probe_type = PROBE_PREFER_ASYNCHRONOUS, 1314ee0f3092SFaiz Abbas .pm = &sdhci_omap_dev_pm_ops, 13157d326930SKishon Vijay Abraham I .of_match_table = omap_sdhci_match, 13167d326930SKishon Vijay Abraham I }, 13177d326930SKishon Vijay Abraham I }; 13187d326930SKishon Vijay Abraham I 13197d326930SKishon Vijay Abraham I module_platform_driver(sdhci_omap_driver); 13207d326930SKishon Vijay Abraham I 13217d326930SKishon Vijay Abraham I MODULE_DESCRIPTION("SDHCI driver for OMAP SoCs"); 13227d326930SKishon Vijay Abraham I MODULE_AUTHOR("Texas Instruments Inc."); 13237d326930SKishon Vijay Abraham I MODULE_LICENSE("GPL v2"); 13247d326930SKishon Vijay Abraham I MODULE_ALIAS("platform:sdhci_omap"); 1325