17d326930SKishon Vijay Abraham I /** 27d326930SKishon Vijay Abraham I * SDHCI Controller driver for TI's OMAP SoCs 37d326930SKishon Vijay Abraham I * 47d326930SKishon Vijay Abraham I * Copyright (C) 2017 Texas Instruments 57d326930SKishon Vijay Abraham I * Author: Kishon Vijay Abraham I <kishon@ti.com> 67d326930SKishon Vijay Abraham I * 77d326930SKishon Vijay Abraham I * This program is free software: you can redistribute it and/or modify 87d326930SKishon Vijay Abraham I * it under the terms of the GNU General Public License version 2 of 97d326930SKishon Vijay Abraham I * the License as published by the Free Software Foundation. 107d326930SKishon Vijay Abraham I * 117d326930SKishon Vijay Abraham I * This program is distributed in the hope that it will be useful, 127d326930SKishon Vijay Abraham I * but WITHOUT ANY WARRANTY; without even the implied warranty of 137d326930SKishon Vijay Abraham I * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 147d326930SKishon Vijay Abraham I * GNU General Public License for more details. 157d326930SKishon Vijay Abraham I * 167d326930SKishon Vijay Abraham I * You should have received a copy of the GNU General Public License 177d326930SKishon Vijay Abraham I * along with this program. If not, see <http://www.gnu.org/licenses/>. 187d326930SKishon Vijay Abraham I */ 197d326930SKishon Vijay Abraham I 207d326930SKishon Vijay Abraham I #include <linux/delay.h> 217d326930SKishon Vijay Abraham I #include <linux/mmc/slot-gpio.h> 227d326930SKishon Vijay Abraham I #include <linux/module.h> 237d326930SKishon Vijay Abraham I #include <linux/of.h> 247d326930SKishon Vijay Abraham I #include <linux/of_device.h> 257d326930SKishon Vijay Abraham I #include <linux/platform_device.h> 267d326930SKishon Vijay Abraham I #include <linux/pm_runtime.h> 277d326930SKishon Vijay Abraham I #include <linux/regulator/consumer.h> 288d20b2eaSKishon Vijay Abraham I #include <linux/pinctrl/consumer.h> 29212f4f8aSKishon Vijay Abraham I #include <linux/sys_soc.h> 307d326930SKishon Vijay Abraham I 317d326930SKishon Vijay Abraham I #include "sdhci-pltfm.h" 327d326930SKishon Vijay Abraham I 337d326930SKishon Vijay Abraham I #define SDHCI_OMAP_CON 0x12c 347d326930SKishon Vijay Abraham I #define CON_DW8 BIT(5) 357d326930SKishon Vijay Abraham I #define CON_DMA_MASTER BIT(20) 3627ceb7e0SKishon Vijay Abraham I #define CON_DDR BIT(19) 3720ea26a1SKishon Vijay Abraham I #define CON_CLKEXTFREE BIT(16) 3820ea26a1SKishon Vijay Abraham I #define CON_PADEN BIT(15) 397d326930SKishon Vijay Abraham I #define CON_INIT BIT(1) 407d326930SKishon Vijay Abraham I #define CON_OD BIT(0) 417d326930SKishon Vijay Abraham I 429fc2cd76SKishon Vijay Abraham I #define SDHCI_OMAP_DLL 0x0134 439fc2cd76SKishon Vijay Abraham I #define DLL_SWT BIT(20) 449fc2cd76SKishon Vijay Abraham I #define DLL_FORCE_SR_C_SHIFT 13 459fc2cd76SKishon Vijay Abraham I #define DLL_FORCE_SR_C_MASK (0x7f << DLL_FORCE_SR_C_SHIFT) 469fc2cd76SKishon Vijay Abraham I #define DLL_FORCE_VALUE BIT(12) 479fc2cd76SKishon Vijay Abraham I #define DLL_CALIB BIT(1) 489fc2cd76SKishon Vijay Abraham I 497d326930SKishon Vijay Abraham I #define SDHCI_OMAP_CMD 0x20c 507d326930SKishon Vijay Abraham I 5120ea26a1SKishon Vijay Abraham I #define SDHCI_OMAP_PSTATE 0x0224 5220ea26a1SKishon Vijay Abraham I #define PSTATE_DLEV_DAT0 BIT(20) 5320ea26a1SKishon Vijay Abraham I #define PSTATE_DATI BIT(1) 5420ea26a1SKishon Vijay Abraham I 557d326930SKishon Vijay Abraham I #define SDHCI_OMAP_HCTL 0x228 567d326930SKishon Vijay Abraham I #define HCTL_SDBP BIT(8) 577d326930SKishon Vijay Abraham I #define HCTL_SDVS_SHIFT 9 587d326930SKishon Vijay Abraham I #define HCTL_SDVS_MASK (0x7 << HCTL_SDVS_SHIFT) 597d326930SKishon Vijay Abraham I #define HCTL_SDVS_33 (0x7 << HCTL_SDVS_SHIFT) 607d326930SKishon Vijay Abraham I #define HCTL_SDVS_30 (0x6 << HCTL_SDVS_SHIFT) 617d326930SKishon Vijay Abraham I #define HCTL_SDVS_18 (0x5 << HCTL_SDVS_SHIFT) 627d326930SKishon Vijay Abraham I 637d326930SKishon Vijay Abraham I #define SDHCI_OMAP_SYSCTL 0x22c 647d326930SKishon Vijay Abraham I #define SYSCTL_CEN BIT(2) 657d326930SKishon Vijay Abraham I #define SYSCTL_CLKD_SHIFT 6 667d326930SKishon Vijay Abraham I #define SYSCTL_CLKD_MASK 0x3ff 677d326930SKishon Vijay Abraham I 687d326930SKishon Vijay Abraham I #define SDHCI_OMAP_STAT 0x230 697d326930SKishon Vijay Abraham I 707d326930SKishon Vijay Abraham I #define SDHCI_OMAP_IE 0x234 717d326930SKishon Vijay Abraham I #define INT_CC_EN BIT(0) 727d326930SKishon Vijay Abraham I 737d326930SKishon Vijay Abraham I #define SDHCI_OMAP_AC12 0x23c 747d326930SKishon Vijay Abraham I #define AC12_V1V8_SIGEN BIT(19) 759fc2cd76SKishon Vijay Abraham I #define AC12_SCLK_SEL BIT(23) 767d326930SKishon Vijay Abraham I 777d326930SKishon Vijay Abraham I #define SDHCI_OMAP_CAPA 0x240 787d326930SKishon Vijay Abraham I #define CAPA_VS33 BIT(24) 797d326930SKishon Vijay Abraham I #define CAPA_VS30 BIT(25) 807d326930SKishon Vijay Abraham I #define CAPA_VS18 BIT(26) 817d326930SKishon Vijay Abraham I 829fc2cd76SKishon Vijay Abraham I #define SDHCI_OMAP_CAPA2 0x0244 839fc2cd76SKishon Vijay Abraham I #define CAPA2_TSDR50 BIT(13) 849fc2cd76SKishon Vijay Abraham I 857d326930SKishon Vijay Abraham I #define SDHCI_OMAP_TIMEOUT 1 /* 1 msec */ 867d326930SKishon Vijay Abraham I 877d326930SKishon Vijay Abraham I #define SYSCTL_CLKD_MAX 0x3FF 887d326930SKishon Vijay Abraham I 897d326930SKishon Vijay Abraham I #define IOV_1V8 1800000 /* 180000 uV */ 907d326930SKishon Vijay Abraham I #define IOV_3V0 3000000 /* 300000 uV */ 917d326930SKishon Vijay Abraham I #define IOV_3V3 3300000 /* 330000 uV */ 927d326930SKishon Vijay Abraham I 939fc2cd76SKishon Vijay Abraham I #define MAX_PHASE_DELAY 0x7C 949fc2cd76SKishon Vijay Abraham I 958d20b2eaSKishon Vijay Abraham I /* sdhci-omap controller flags */ 968d20b2eaSKishon Vijay Abraham I #define SDHCI_OMAP_REQUIRE_IODELAY BIT(0) 978d20b2eaSKishon Vijay Abraham I 987d326930SKishon Vijay Abraham I struct sdhci_omap_data { 997d326930SKishon Vijay Abraham I u32 offset; 1008d20b2eaSKishon Vijay Abraham I u8 flags; 1017d326930SKishon Vijay Abraham I }; 1027d326930SKishon Vijay Abraham I 1037d326930SKishon Vijay Abraham I struct sdhci_omap_host { 104212f4f8aSKishon Vijay Abraham I char *version; 1057d326930SKishon Vijay Abraham I void __iomem *base; 1067d326930SKishon Vijay Abraham I struct device *dev; 1077d326930SKishon Vijay Abraham I struct regulator *pbias; 1087d326930SKishon Vijay Abraham I bool pbias_enabled; 1097d326930SKishon Vijay Abraham I struct sdhci_host *host; 1107d326930SKishon Vijay Abraham I u8 bus_mode; 1117d326930SKishon Vijay Abraham I u8 power_mode; 1128d20b2eaSKishon Vijay Abraham I u8 timing; 1138d20b2eaSKishon Vijay Abraham I u8 flags; 1148d20b2eaSKishon Vijay Abraham I 1158d20b2eaSKishon Vijay Abraham I struct pinctrl *pinctrl; 1168d20b2eaSKishon Vijay Abraham I struct pinctrl_state **pinctrl_state; 1177d326930SKishon Vijay Abraham I }; 1187d326930SKishon Vijay Abraham I 1198d20b2eaSKishon Vijay Abraham I static void sdhci_omap_start_clock(struct sdhci_omap_host *omap_host); 1208d20b2eaSKishon Vijay Abraham I static void sdhci_omap_stop_clock(struct sdhci_omap_host *omap_host); 1218d20b2eaSKishon Vijay Abraham I 1227d326930SKishon Vijay Abraham I static inline u32 sdhci_omap_readl(struct sdhci_omap_host *host, 1237d326930SKishon Vijay Abraham I unsigned int offset) 1247d326930SKishon Vijay Abraham I { 1257d326930SKishon Vijay Abraham I return readl(host->base + offset); 1267d326930SKishon Vijay Abraham I } 1277d326930SKishon Vijay Abraham I 1287d326930SKishon Vijay Abraham I static inline void sdhci_omap_writel(struct sdhci_omap_host *host, 1297d326930SKishon Vijay Abraham I unsigned int offset, u32 data) 1307d326930SKishon Vijay Abraham I { 1317d326930SKishon Vijay Abraham I writel(data, host->base + offset); 1327d326930SKishon Vijay Abraham I } 1337d326930SKishon Vijay Abraham I 1347d326930SKishon Vijay Abraham I static int sdhci_omap_set_pbias(struct sdhci_omap_host *omap_host, 1357d326930SKishon Vijay Abraham I bool power_on, unsigned int iov) 1367d326930SKishon Vijay Abraham I { 1377d326930SKishon Vijay Abraham I int ret; 1387d326930SKishon Vijay Abraham I struct device *dev = omap_host->dev; 1397d326930SKishon Vijay Abraham I 1407d326930SKishon Vijay Abraham I if (IS_ERR(omap_host->pbias)) 1417d326930SKishon Vijay Abraham I return 0; 1427d326930SKishon Vijay Abraham I 1437d326930SKishon Vijay Abraham I if (power_on) { 1447d326930SKishon Vijay Abraham I ret = regulator_set_voltage(omap_host->pbias, iov, iov); 1457d326930SKishon Vijay Abraham I if (ret) { 1467d326930SKishon Vijay Abraham I dev_err(dev, "pbias set voltage failed\n"); 1477d326930SKishon Vijay Abraham I return ret; 1487d326930SKishon Vijay Abraham I } 1497d326930SKishon Vijay Abraham I 1507d326930SKishon Vijay Abraham I if (omap_host->pbias_enabled) 1517d326930SKishon Vijay Abraham I return 0; 1527d326930SKishon Vijay Abraham I 1537d326930SKishon Vijay Abraham I ret = regulator_enable(omap_host->pbias); 1547d326930SKishon Vijay Abraham I if (ret) { 1557d326930SKishon Vijay Abraham I dev_err(dev, "pbias reg enable fail\n"); 1567d326930SKishon Vijay Abraham I return ret; 1577d326930SKishon Vijay Abraham I } 1587d326930SKishon Vijay Abraham I 1597d326930SKishon Vijay Abraham I omap_host->pbias_enabled = true; 1607d326930SKishon Vijay Abraham I } else { 1617d326930SKishon Vijay Abraham I if (!omap_host->pbias_enabled) 1627d326930SKishon Vijay Abraham I return 0; 1637d326930SKishon Vijay Abraham I 1647d326930SKishon Vijay Abraham I ret = regulator_disable(omap_host->pbias); 1657d326930SKishon Vijay Abraham I if (ret) { 1667d326930SKishon Vijay Abraham I dev_err(dev, "pbias reg disable fail\n"); 1677d326930SKishon Vijay Abraham I return ret; 1687d326930SKishon Vijay Abraham I } 1697d326930SKishon Vijay Abraham I omap_host->pbias_enabled = false; 1707d326930SKishon Vijay Abraham I } 1717d326930SKishon Vijay Abraham I 1727d326930SKishon Vijay Abraham I return 0; 1737d326930SKishon Vijay Abraham I } 1747d326930SKishon Vijay Abraham I 1757d326930SKishon Vijay Abraham I static int sdhci_omap_enable_iov(struct sdhci_omap_host *omap_host, 1767d326930SKishon Vijay Abraham I unsigned int iov) 1777d326930SKishon Vijay Abraham I { 1787d326930SKishon Vijay Abraham I int ret; 1797d326930SKishon Vijay Abraham I struct sdhci_host *host = omap_host->host; 1807d326930SKishon Vijay Abraham I struct mmc_host *mmc = host->mmc; 1817d326930SKishon Vijay Abraham I 1827d326930SKishon Vijay Abraham I ret = sdhci_omap_set_pbias(omap_host, false, 0); 1837d326930SKishon Vijay Abraham I if (ret) 1847d326930SKishon Vijay Abraham I return ret; 1857d326930SKishon Vijay Abraham I 1867d326930SKishon Vijay Abraham I if (!IS_ERR(mmc->supply.vqmmc)) { 1877d326930SKishon Vijay Abraham I ret = regulator_set_voltage(mmc->supply.vqmmc, iov, iov); 1887d326930SKishon Vijay Abraham I if (ret) { 1897d326930SKishon Vijay Abraham I dev_err(mmc_dev(mmc), "vqmmc set voltage failed\n"); 1907d326930SKishon Vijay Abraham I return ret; 1917d326930SKishon Vijay Abraham I } 1927d326930SKishon Vijay Abraham I } 1937d326930SKishon Vijay Abraham I 1947d326930SKishon Vijay Abraham I ret = sdhci_omap_set_pbias(omap_host, true, iov); 1957d326930SKishon Vijay Abraham I if (ret) 1967d326930SKishon Vijay Abraham I return ret; 1977d326930SKishon Vijay Abraham I 1987d326930SKishon Vijay Abraham I return 0; 1997d326930SKishon Vijay Abraham I } 2007d326930SKishon Vijay Abraham I 2017d326930SKishon Vijay Abraham I static void sdhci_omap_conf_bus_power(struct sdhci_omap_host *omap_host, 2027d326930SKishon Vijay Abraham I unsigned char signal_voltage) 2037d326930SKishon Vijay Abraham I { 2047d326930SKishon Vijay Abraham I u32 reg; 2057d326930SKishon Vijay Abraham I ktime_t timeout; 2067d326930SKishon Vijay Abraham I 2077d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_HCTL); 2087d326930SKishon Vijay Abraham I reg &= ~HCTL_SDVS_MASK; 2097d326930SKishon Vijay Abraham I 2107d326930SKishon Vijay Abraham I if (signal_voltage == MMC_SIGNAL_VOLTAGE_330) 2117d326930SKishon Vijay Abraham I reg |= HCTL_SDVS_33; 2127d326930SKishon Vijay Abraham I else 2137d326930SKishon Vijay Abraham I reg |= HCTL_SDVS_18; 2147d326930SKishon Vijay Abraham I 2157d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_HCTL, reg); 2167d326930SKishon Vijay Abraham I 2177d326930SKishon Vijay Abraham I reg |= HCTL_SDBP; 2187d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_HCTL, reg); 2197d326930SKishon Vijay Abraham I 2207d326930SKishon Vijay Abraham I /* wait 1ms */ 2217d326930SKishon Vijay Abraham I timeout = ktime_add_ms(ktime_get(), SDHCI_OMAP_TIMEOUT); 2227d326930SKishon Vijay Abraham I while (!(sdhci_omap_readl(omap_host, SDHCI_OMAP_HCTL) & HCTL_SDBP)) { 2237d326930SKishon Vijay Abraham I if (WARN_ON(ktime_after(ktime_get(), timeout))) 2247d326930SKishon Vijay Abraham I return; 2257d326930SKishon Vijay Abraham I usleep_range(5, 10); 2267d326930SKishon Vijay Abraham I } 2277d326930SKishon Vijay Abraham I } 2287d326930SKishon Vijay Abraham I 2299fc2cd76SKishon Vijay Abraham I static inline void sdhci_omap_set_dll(struct sdhci_omap_host *omap_host, 2309fc2cd76SKishon Vijay Abraham I int count) 2319fc2cd76SKishon Vijay Abraham I { 2329fc2cd76SKishon Vijay Abraham I int i; 2339fc2cd76SKishon Vijay Abraham I u32 reg; 2349fc2cd76SKishon Vijay Abraham I 2359fc2cd76SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_DLL); 2369fc2cd76SKishon Vijay Abraham I reg |= DLL_FORCE_VALUE; 2379fc2cd76SKishon Vijay Abraham I reg &= ~DLL_FORCE_SR_C_MASK; 2389fc2cd76SKishon Vijay Abraham I reg |= (count << DLL_FORCE_SR_C_SHIFT); 2399fc2cd76SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_DLL, reg); 2409fc2cd76SKishon Vijay Abraham I 2419fc2cd76SKishon Vijay Abraham I reg |= DLL_CALIB; 2429fc2cd76SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_DLL, reg); 2439fc2cd76SKishon Vijay Abraham I for (i = 0; i < 1000; i++) { 2449fc2cd76SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_DLL); 2459fc2cd76SKishon Vijay Abraham I if (reg & DLL_CALIB) 2469fc2cd76SKishon Vijay Abraham I break; 2479fc2cd76SKishon Vijay Abraham I } 2489fc2cd76SKishon Vijay Abraham I reg &= ~DLL_CALIB; 2499fc2cd76SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_DLL, reg); 2509fc2cd76SKishon Vijay Abraham I } 2519fc2cd76SKishon Vijay Abraham I 2529fc2cd76SKishon Vijay Abraham I static void sdhci_omap_disable_tuning(struct sdhci_omap_host *omap_host) 2539fc2cd76SKishon Vijay Abraham I { 2549fc2cd76SKishon Vijay Abraham I u32 reg; 2559fc2cd76SKishon Vijay Abraham I 2569fc2cd76SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_AC12); 2579fc2cd76SKishon Vijay Abraham I reg &= ~AC12_SCLK_SEL; 2589fc2cd76SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_AC12, reg); 2599fc2cd76SKishon Vijay Abraham I 2609fc2cd76SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_DLL); 2619fc2cd76SKishon Vijay Abraham I reg &= ~(DLL_FORCE_VALUE | DLL_SWT); 2629fc2cd76SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_DLL, reg); 2639fc2cd76SKishon Vijay Abraham I } 2649fc2cd76SKishon Vijay Abraham I 2659fc2cd76SKishon Vijay Abraham I static int sdhci_omap_execute_tuning(struct mmc_host *mmc, u32 opcode) 2669fc2cd76SKishon Vijay Abraham I { 2679fc2cd76SKishon Vijay Abraham I struct sdhci_host *host = mmc_priv(mmc); 2689fc2cd76SKishon Vijay Abraham I struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 2699fc2cd76SKishon Vijay Abraham I struct sdhci_omap_host *omap_host = sdhci_pltfm_priv(pltfm_host); 2709fc2cd76SKishon Vijay Abraham I struct device *dev = omap_host->dev; 2719fc2cd76SKishon Vijay Abraham I struct mmc_ios *ios = &mmc->ios; 2729fc2cd76SKishon Vijay Abraham I u32 start_window = 0, max_window = 0; 2739fc2cd76SKishon Vijay Abraham I u8 cur_match, prev_match = 0; 2749fc2cd76SKishon Vijay Abraham I u32 length = 0, max_len = 0; 2757d33c358SKishon Vijay Abraham I u32 ier = host->ier; 2769fc2cd76SKishon Vijay Abraham I u32 phase_delay = 0; 2779fc2cd76SKishon Vijay Abraham I int ret = 0; 2789fc2cd76SKishon Vijay Abraham I u32 reg; 2799fc2cd76SKishon Vijay Abraham I 2809fc2cd76SKishon Vijay Abraham I pltfm_host = sdhci_priv(host); 2819fc2cd76SKishon Vijay Abraham I omap_host = sdhci_pltfm_priv(pltfm_host); 2829fc2cd76SKishon Vijay Abraham I dev = omap_host->dev; 2839fc2cd76SKishon Vijay Abraham I 2849fc2cd76SKishon Vijay Abraham I /* clock tuning is not needed for upto 52MHz */ 2859fc2cd76SKishon Vijay Abraham I if (ios->clock <= 52000000) 2869fc2cd76SKishon Vijay Abraham I return 0; 2879fc2cd76SKishon Vijay Abraham I 2889fc2cd76SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CAPA2); 2899fc2cd76SKishon Vijay Abraham I if (ios->timing == MMC_TIMING_UHS_SDR50 && !(reg & CAPA2_TSDR50)) 2909fc2cd76SKishon Vijay Abraham I return 0; 2919fc2cd76SKishon Vijay Abraham I 2929fc2cd76SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_DLL); 2939fc2cd76SKishon Vijay Abraham I reg |= DLL_SWT; 2949fc2cd76SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_DLL, reg); 2959fc2cd76SKishon Vijay Abraham I 2967d33c358SKishon Vijay Abraham I /* 2977d33c358SKishon Vijay Abraham I * OMAP5/DRA74X/DRA72x Errata i802: 2987d33c358SKishon Vijay Abraham I * DCRC error interrupts (MMCHS_STAT[21] DCRC=0x1) can occur 2997d33c358SKishon Vijay Abraham I * during the tuning procedure. So disable it during the 3007d33c358SKishon Vijay Abraham I * tuning procedure. 3017d33c358SKishon Vijay Abraham I */ 3027d33c358SKishon Vijay Abraham I ier &= ~SDHCI_INT_DATA_CRC; 3037d33c358SKishon Vijay Abraham I sdhci_writel(host, ier, SDHCI_INT_ENABLE); 3047d33c358SKishon Vijay Abraham I sdhci_writel(host, ier, SDHCI_SIGNAL_ENABLE); 3057d33c358SKishon Vijay Abraham I 3069fc2cd76SKishon Vijay Abraham I while (phase_delay <= MAX_PHASE_DELAY) { 3079fc2cd76SKishon Vijay Abraham I sdhci_omap_set_dll(omap_host, phase_delay); 3089fc2cd76SKishon Vijay Abraham I 3099fc2cd76SKishon Vijay Abraham I cur_match = !mmc_send_tuning(mmc, opcode, NULL); 3109fc2cd76SKishon Vijay Abraham I if (cur_match) { 3119fc2cd76SKishon Vijay Abraham I if (prev_match) { 3129fc2cd76SKishon Vijay Abraham I length++; 3139fc2cd76SKishon Vijay Abraham I } else { 3149fc2cd76SKishon Vijay Abraham I start_window = phase_delay; 3159fc2cd76SKishon Vijay Abraham I length = 1; 3169fc2cd76SKishon Vijay Abraham I } 3179fc2cd76SKishon Vijay Abraham I } 3189fc2cd76SKishon Vijay Abraham I 3199fc2cd76SKishon Vijay Abraham I if (length > max_len) { 3209fc2cd76SKishon Vijay Abraham I max_window = start_window; 3219fc2cd76SKishon Vijay Abraham I max_len = length; 3229fc2cd76SKishon Vijay Abraham I } 3239fc2cd76SKishon Vijay Abraham I 3249fc2cd76SKishon Vijay Abraham I prev_match = cur_match; 3259fc2cd76SKishon Vijay Abraham I phase_delay += 4; 3269fc2cd76SKishon Vijay Abraham I } 3279fc2cd76SKishon Vijay Abraham I 3289fc2cd76SKishon Vijay Abraham I if (!max_len) { 3299fc2cd76SKishon Vijay Abraham I dev_err(dev, "Unable to find match\n"); 3309fc2cd76SKishon Vijay Abraham I ret = -EIO; 3319fc2cd76SKishon Vijay Abraham I goto tuning_error; 3329fc2cd76SKishon Vijay Abraham I } 3339fc2cd76SKishon Vijay Abraham I 3349fc2cd76SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_AC12); 3359fc2cd76SKishon Vijay Abraham I if (!(reg & AC12_SCLK_SEL)) { 3369fc2cd76SKishon Vijay Abraham I ret = -EIO; 3379fc2cd76SKishon Vijay Abraham I goto tuning_error; 3389fc2cd76SKishon Vijay Abraham I } 3399fc2cd76SKishon Vijay Abraham I 3409fc2cd76SKishon Vijay Abraham I phase_delay = max_window + 4 * (max_len >> 1); 3419fc2cd76SKishon Vijay Abraham I sdhci_omap_set_dll(omap_host, phase_delay); 3429fc2cd76SKishon Vijay Abraham I 3439fc2cd76SKishon Vijay Abraham I goto ret; 3449fc2cd76SKishon Vijay Abraham I 3459fc2cd76SKishon Vijay Abraham I tuning_error: 3469fc2cd76SKishon Vijay Abraham I dev_err(dev, "Tuning failed\n"); 3479fc2cd76SKishon Vijay Abraham I sdhci_omap_disable_tuning(omap_host); 3489fc2cd76SKishon Vijay Abraham I 3499fc2cd76SKishon Vijay Abraham I ret: 3509fc2cd76SKishon Vijay Abraham I sdhci_reset(host, SDHCI_RESET_CMD | SDHCI_RESET_DATA); 3517d33c358SKishon Vijay Abraham I sdhci_writel(host, host->ier, SDHCI_INT_ENABLE); 3527d33c358SKishon Vijay Abraham I sdhci_writel(host, host->ier, SDHCI_SIGNAL_ENABLE); 3539fc2cd76SKishon Vijay Abraham I return ret; 3549fc2cd76SKishon Vijay Abraham I } 3559fc2cd76SKishon Vijay Abraham I 35620ea26a1SKishon Vijay Abraham I static int sdhci_omap_card_busy(struct mmc_host *mmc) 35720ea26a1SKishon Vijay Abraham I { 35820ea26a1SKishon Vijay Abraham I u32 reg, ac12; 35920ea26a1SKishon Vijay Abraham I int ret = false; 36020ea26a1SKishon Vijay Abraham I struct sdhci_host *host = mmc_priv(mmc); 36120ea26a1SKishon Vijay Abraham I struct sdhci_pltfm_host *pltfm_host; 36220ea26a1SKishon Vijay Abraham I struct sdhci_omap_host *omap_host; 36320ea26a1SKishon Vijay Abraham I u32 ier = host->ier; 36420ea26a1SKishon Vijay Abraham I 36520ea26a1SKishon Vijay Abraham I pltfm_host = sdhci_priv(host); 36620ea26a1SKishon Vijay Abraham I omap_host = sdhci_pltfm_priv(pltfm_host); 36720ea26a1SKishon Vijay Abraham I 36820ea26a1SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CON); 36920ea26a1SKishon Vijay Abraham I ac12 = sdhci_omap_readl(omap_host, SDHCI_OMAP_AC12); 37020ea26a1SKishon Vijay Abraham I reg &= ~CON_CLKEXTFREE; 37120ea26a1SKishon Vijay Abraham I if (ac12 & AC12_V1V8_SIGEN) 37220ea26a1SKishon Vijay Abraham I reg |= CON_CLKEXTFREE; 37320ea26a1SKishon Vijay Abraham I reg |= CON_PADEN; 37420ea26a1SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_CON, reg); 37520ea26a1SKishon Vijay Abraham I 37620ea26a1SKishon Vijay Abraham I disable_irq(host->irq); 37720ea26a1SKishon Vijay Abraham I ier |= SDHCI_INT_CARD_INT; 37820ea26a1SKishon Vijay Abraham I sdhci_writel(host, ier, SDHCI_INT_ENABLE); 37920ea26a1SKishon Vijay Abraham I sdhci_writel(host, ier, SDHCI_SIGNAL_ENABLE); 38020ea26a1SKishon Vijay Abraham I 38120ea26a1SKishon Vijay Abraham I /* 38220ea26a1SKishon Vijay Abraham I * Delay is required for PSTATE to correctly reflect 38320ea26a1SKishon Vijay Abraham I * DLEV/CLEV values after PADEN is set. 38420ea26a1SKishon Vijay Abraham I */ 38520ea26a1SKishon Vijay Abraham I usleep_range(50, 100); 38620ea26a1SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_PSTATE); 38720ea26a1SKishon Vijay Abraham I if ((reg & PSTATE_DATI) || !(reg & PSTATE_DLEV_DAT0)) 38820ea26a1SKishon Vijay Abraham I ret = true; 38920ea26a1SKishon Vijay Abraham I 39020ea26a1SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CON); 39120ea26a1SKishon Vijay Abraham I reg &= ~(CON_CLKEXTFREE | CON_PADEN); 39220ea26a1SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_CON, reg); 39320ea26a1SKishon Vijay Abraham I 39420ea26a1SKishon Vijay Abraham I sdhci_writel(host, host->ier, SDHCI_INT_ENABLE); 39520ea26a1SKishon Vijay Abraham I sdhci_writel(host, host->ier, SDHCI_SIGNAL_ENABLE); 39620ea26a1SKishon Vijay Abraham I enable_irq(host->irq); 39720ea26a1SKishon Vijay Abraham I 39820ea26a1SKishon Vijay Abraham I return ret; 39920ea26a1SKishon Vijay Abraham I } 40020ea26a1SKishon Vijay Abraham I 4017d326930SKishon Vijay Abraham I static int sdhci_omap_start_signal_voltage_switch(struct mmc_host *mmc, 4027d326930SKishon Vijay Abraham I struct mmc_ios *ios) 4037d326930SKishon Vijay Abraham I { 4047d326930SKishon Vijay Abraham I u32 reg; 4057d326930SKishon Vijay Abraham I int ret; 4067d326930SKishon Vijay Abraham I unsigned int iov; 4077d326930SKishon Vijay Abraham I struct sdhci_host *host = mmc_priv(mmc); 4087d326930SKishon Vijay Abraham I struct sdhci_pltfm_host *pltfm_host; 4097d326930SKishon Vijay Abraham I struct sdhci_omap_host *omap_host; 4107d326930SKishon Vijay Abraham I struct device *dev; 4117d326930SKishon Vijay Abraham I 4127d326930SKishon Vijay Abraham I pltfm_host = sdhci_priv(host); 4137d326930SKishon Vijay Abraham I omap_host = sdhci_pltfm_priv(pltfm_host); 4147d326930SKishon Vijay Abraham I dev = omap_host->dev; 4157d326930SKishon Vijay Abraham I 4167d326930SKishon Vijay Abraham I if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_330) { 4177d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CAPA); 4187d326930SKishon Vijay Abraham I if (!(reg & CAPA_VS33)) 4197d326930SKishon Vijay Abraham I return -EOPNOTSUPP; 4207d326930SKishon Vijay Abraham I 4217d326930SKishon Vijay Abraham I sdhci_omap_conf_bus_power(omap_host, ios->signal_voltage); 4227d326930SKishon Vijay Abraham I 4237d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_AC12); 4247d326930SKishon Vijay Abraham I reg &= ~AC12_V1V8_SIGEN; 4257d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_AC12, reg); 4267d326930SKishon Vijay Abraham I 4277d326930SKishon Vijay Abraham I iov = IOV_3V3; 4287d326930SKishon Vijay Abraham I } else if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_180) { 4297d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CAPA); 4307d326930SKishon Vijay Abraham I if (!(reg & CAPA_VS18)) 4317d326930SKishon Vijay Abraham I return -EOPNOTSUPP; 4327d326930SKishon Vijay Abraham I 4337d326930SKishon Vijay Abraham I sdhci_omap_conf_bus_power(omap_host, ios->signal_voltage); 4347d326930SKishon Vijay Abraham I 4357d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_AC12); 4367d326930SKishon Vijay Abraham I reg |= AC12_V1V8_SIGEN; 4377d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_AC12, reg); 4387d326930SKishon Vijay Abraham I 4397d326930SKishon Vijay Abraham I iov = IOV_1V8; 4407d326930SKishon Vijay Abraham I } else { 4417d326930SKishon Vijay Abraham I return -EOPNOTSUPP; 4427d326930SKishon Vijay Abraham I } 4437d326930SKishon Vijay Abraham I 4447d326930SKishon Vijay Abraham I ret = sdhci_omap_enable_iov(omap_host, iov); 4457d326930SKishon Vijay Abraham I if (ret) { 4467d326930SKishon Vijay Abraham I dev_err(dev, "failed to switch IO voltage to %dmV\n", iov); 4477d326930SKishon Vijay Abraham I return ret; 4487d326930SKishon Vijay Abraham I } 4497d326930SKishon Vijay Abraham I 4507d326930SKishon Vijay Abraham I dev_dbg(dev, "IO voltage switched to %dmV\n", iov); 4517d326930SKishon Vijay Abraham I return 0; 4527d326930SKishon Vijay Abraham I } 4537d326930SKishon Vijay Abraham I 4548d20b2eaSKishon Vijay Abraham I static void sdhci_omap_set_timing(struct sdhci_omap_host *omap_host, u8 timing) 4558d20b2eaSKishon Vijay Abraham I { 4568d20b2eaSKishon Vijay Abraham I int ret; 4578d20b2eaSKishon Vijay Abraham I struct pinctrl_state *pinctrl_state; 4588d20b2eaSKishon Vijay Abraham I struct device *dev = omap_host->dev; 4598d20b2eaSKishon Vijay Abraham I 4608d20b2eaSKishon Vijay Abraham I if (!(omap_host->flags & SDHCI_OMAP_REQUIRE_IODELAY)) 4618d20b2eaSKishon Vijay Abraham I return; 4628d20b2eaSKishon Vijay Abraham I 4638d20b2eaSKishon Vijay Abraham I if (omap_host->timing == timing) 4648d20b2eaSKishon Vijay Abraham I return; 4658d20b2eaSKishon Vijay Abraham I 4668d20b2eaSKishon Vijay Abraham I sdhci_omap_stop_clock(omap_host); 4678d20b2eaSKishon Vijay Abraham I 4688d20b2eaSKishon Vijay Abraham I pinctrl_state = omap_host->pinctrl_state[timing]; 4698d20b2eaSKishon Vijay Abraham I ret = pinctrl_select_state(omap_host->pinctrl, pinctrl_state); 4708d20b2eaSKishon Vijay Abraham I if (ret) { 4718d20b2eaSKishon Vijay Abraham I dev_err(dev, "failed to select pinctrl state\n"); 4728d20b2eaSKishon Vijay Abraham I return; 4738d20b2eaSKishon Vijay Abraham I } 4748d20b2eaSKishon Vijay Abraham I 4758d20b2eaSKishon Vijay Abraham I sdhci_omap_start_clock(omap_host); 4768d20b2eaSKishon Vijay Abraham I omap_host->timing = timing; 4778d20b2eaSKishon Vijay Abraham I } 4788d20b2eaSKishon Vijay Abraham I 479300df508SKishon Vijay Abraham I static void sdhci_omap_set_power_mode(struct sdhci_omap_host *omap_host, 480300df508SKishon Vijay Abraham I u8 power_mode) 481300df508SKishon Vijay Abraham I { 4829fc2cd76SKishon Vijay Abraham I if (omap_host->bus_mode == MMC_POWER_OFF) 4839fc2cd76SKishon Vijay Abraham I sdhci_omap_disable_tuning(omap_host); 484300df508SKishon Vijay Abraham I omap_host->power_mode = power_mode; 485300df508SKishon Vijay Abraham I } 486300df508SKishon Vijay Abraham I 4877d326930SKishon Vijay Abraham I static void sdhci_omap_set_bus_mode(struct sdhci_omap_host *omap_host, 4887d326930SKishon Vijay Abraham I unsigned int mode) 4897d326930SKishon Vijay Abraham I { 4907d326930SKishon Vijay Abraham I u32 reg; 4917d326930SKishon Vijay Abraham I 4927d326930SKishon Vijay Abraham I if (omap_host->bus_mode == mode) 4937d326930SKishon Vijay Abraham I return; 4947d326930SKishon Vijay Abraham I 4957d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CON); 4967d326930SKishon Vijay Abraham I if (mode == MMC_BUSMODE_OPENDRAIN) 4977d326930SKishon Vijay Abraham I reg |= CON_OD; 4987d326930SKishon Vijay Abraham I else 4997d326930SKishon Vijay Abraham I reg &= ~CON_OD; 5007d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_CON, reg); 5017d326930SKishon Vijay Abraham I 5027d326930SKishon Vijay Abraham I omap_host->bus_mode = mode; 5037d326930SKishon Vijay Abraham I } 5047d326930SKishon Vijay Abraham I 505ddde0e7dSColin Ian King static void sdhci_omap_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) 5067d326930SKishon Vijay Abraham I { 5077d326930SKishon Vijay Abraham I struct sdhci_host *host = mmc_priv(mmc); 5087d326930SKishon Vijay Abraham I struct sdhci_pltfm_host *pltfm_host; 5097d326930SKishon Vijay Abraham I struct sdhci_omap_host *omap_host; 5107d326930SKishon Vijay Abraham I 5117d326930SKishon Vijay Abraham I pltfm_host = sdhci_priv(host); 5127d326930SKishon Vijay Abraham I omap_host = sdhci_pltfm_priv(pltfm_host); 5137d326930SKishon Vijay Abraham I 5147d326930SKishon Vijay Abraham I sdhci_omap_set_bus_mode(omap_host, ios->bus_mode); 5158d20b2eaSKishon Vijay Abraham I sdhci_omap_set_timing(omap_host, ios->timing); 5167d326930SKishon Vijay Abraham I sdhci_set_ios(mmc, ios); 517300df508SKishon Vijay Abraham I sdhci_omap_set_power_mode(omap_host, ios->power_mode); 5187d326930SKishon Vijay Abraham I } 5197d326930SKishon Vijay Abraham I 5207d326930SKishon Vijay Abraham I static u16 sdhci_omap_calc_divisor(struct sdhci_pltfm_host *host, 5217d326930SKishon Vijay Abraham I unsigned int clock) 5227d326930SKishon Vijay Abraham I { 5237d326930SKishon Vijay Abraham I u16 dsor; 5247d326930SKishon Vijay Abraham I 5257d326930SKishon Vijay Abraham I dsor = DIV_ROUND_UP(clk_get_rate(host->clk), clock); 5267d326930SKishon Vijay Abraham I if (dsor > SYSCTL_CLKD_MAX) 5277d326930SKishon Vijay Abraham I dsor = SYSCTL_CLKD_MAX; 5287d326930SKishon Vijay Abraham I 5297d326930SKishon Vijay Abraham I return dsor; 5307d326930SKishon Vijay Abraham I } 5317d326930SKishon Vijay Abraham I 5327d326930SKishon Vijay Abraham I static void sdhci_omap_start_clock(struct sdhci_omap_host *omap_host) 5337d326930SKishon Vijay Abraham I { 5347d326930SKishon Vijay Abraham I u32 reg; 5357d326930SKishon Vijay Abraham I 5367d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_SYSCTL); 5377d326930SKishon Vijay Abraham I reg |= SYSCTL_CEN; 5387d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_SYSCTL, reg); 5397d326930SKishon Vijay Abraham I } 5407d326930SKishon Vijay Abraham I 5417d326930SKishon Vijay Abraham I static void sdhci_omap_stop_clock(struct sdhci_omap_host *omap_host) 5427d326930SKishon Vijay Abraham I { 5437d326930SKishon Vijay Abraham I u32 reg; 5447d326930SKishon Vijay Abraham I 5457d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_SYSCTL); 5467d326930SKishon Vijay Abraham I reg &= ~SYSCTL_CEN; 5477d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_SYSCTL, reg); 5487d326930SKishon Vijay Abraham I } 5497d326930SKishon Vijay Abraham I 5507d326930SKishon Vijay Abraham I static void sdhci_omap_set_clock(struct sdhci_host *host, unsigned int clock) 5517d326930SKishon Vijay Abraham I { 5527d326930SKishon Vijay Abraham I struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 5537d326930SKishon Vijay Abraham I struct sdhci_omap_host *omap_host = sdhci_pltfm_priv(pltfm_host); 5547d326930SKishon Vijay Abraham I unsigned long clkdiv; 5557d326930SKishon Vijay Abraham I 5567d326930SKishon Vijay Abraham I sdhci_omap_stop_clock(omap_host); 5577d326930SKishon Vijay Abraham I 5587d326930SKishon Vijay Abraham I if (!clock) 5597d326930SKishon Vijay Abraham I return; 5607d326930SKishon Vijay Abraham I 5617d326930SKishon Vijay Abraham I clkdiv = sdhci_omap_calc_divisor(pltfm_host, clock); 5627d326930SKishon Vijay Abraham I clkdiv = (clkdiv & SYSCTL_CLKD_MASK) << SYSCTL_CLKD_SHIFT; 5637d326930SKishon Vijay Abraham I sdhci_enable_clk(host, clkdiv); 5647d326930SKishon Vijay Abraham I 5657d326930SKishon Vijay Abraham I sdhci_omap_start_clock(omap_host); 5667d326930SKishon Vijay Abraham I } 5677d326930SKishon Vijay Abraham I 568ddde0e7dSColin Ian King static void sdhci_omap_set_power(struct sdhci_host *host, unsigned char mode, 5697d326930SKishon Vijay Abraham I unsigned short vdd) 5707d326930SKishon Vijay Abraham I { 5717d326930SKishon Vijay Abraham I struct mmc_host *mmc = host->mmc; 5727d326930SKishon Vijay Abraham I 5737d326930SKishon Vijay Abraham I mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, vdd); 5747d326930SKishon Vijay Abraham I } 5757d326930SKishon Vijay Abraham I 5767d326930SKishon Vijay Abraham I static int sdhci_omap_enable_dma(struct sdhci_host *host) 5777d326930SKishon Vijay Abraham I { 5787d326930SKishon Vijay Abraham I u32 reg; 5797d326930SKishon Vijay Abraham I struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 5807d326930SKishon Vijay Abraham I struct sdhci_omap_host *omap_host = sdhci_pltfm_priv(pltfm_host); 5817d326930SKishon Vijay Abraham I 5827d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CON); 5837d326930SKishon Vijay Abraham I reg |= CON_DMA_MASTER; 5847d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_CON, reg); 5857d326930SKishon Vijay Abraham I 5867d326930SKishon Vijay Abraham I return 0; 5877d326930SKishon Vijay Abraham I } 5887d326930SKishon Vijay Abraham I 589ddde0e7dSColin Ian King static unsigned int sdhci_omap_get_min_clock(struct sdhci_host *host) 5907d326930SKishon Vijay Abraham I { 5917d326930SKishon Vijay Abraham I struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 5927d326930SKishon Vijay Abraham I 5937d326930SKishon Vijay Abraham I return clk_get_rate(pltfm_host->clk) / SYSCTL_CLKD_MAX; 5947d326930SKishon Vijay Abraham I } 5957d326930SKishon Vijay Abraham I 5967d326930SKishon Vijay Abraham I static void sdhci_omap_set_bus_width(struct sdhci_host *host, int width) 5977d326930SKishon Vijay Abraham I { 5987d326930SKishon Vijay Abraham I struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 5997d326930SKishon Vijay Abraham I struct sdhci_omap_host *omap_host = sdhci_pltfm_priv(pltfm_host); 6007d326930SKishon Vijay Abraham I u32 reg; 6017d326930SKishon Vijay Abraham I 6027d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CON); 6037d326930SKishon Vijay Abraham I if (width == MMC_BUS_WIDTH_8) 6047d326930SKishon Vijay Abraham I reg |= CON_DW8; 6057d326930SKishon Vijay Abraham I else 6067d326930SKishon Vijay Abraham I reg &= ~CON_DW8; 6077d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_CON, reg); 6087d326930SKishon Vijay Abraham I 6097d326930SKishon Vijay Abraham I sdhci_set_bus_width(host, width); 6107d326930SKishon Vijay Abraham I } 6117d326930SKishon Vijay Abraham I 6127d326930SKishon Vijay Abraham I static void sdhci_omap_init_74_clocks(struct sdhci_host *host, u8 power_mode) 6137d326930SKishon Vijay Abraham I { 6147d326930SKishon Vijay Abraham I u32 reg; 6157d326930SKishon Vijay Abraham I ktime_t timeout; 6167d326930SKishon Vijay Abraham I struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 6177d326930SKishon Vijay Abraham I struct sdhci_omap_host *omap_host = sdhci_pltfm_priv(pltfm_host); 6187d326930SKishon Vijay Abraham I 6197d326930SKishon Vijay Abraham I if (omap_host->power_mode == power_mode) 6207d326930SKishon Vijay Abraham I return; 6217d326930SKishon Vijay Abraham I 6227d326930SKishon Vijay Abraham I if (power_mode != MMC_POWER_ON) 6237d326930SKishon Vijay Abraham I return; 6247d326930SKishon Vijay Abraham I 6257d326930SKishon Vijay Abraham I disable_irq(host->irq); 6267d326930SKishon Vijay Abraham I 6277d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CON); 6287d326930SKishon Vijay Abraham I reg |= CON_INIT; 6297d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_CON, reg); 6307d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_CMD, 0x0); 6317d326930SKishon Vijay Abraham I 6327d326930SKishon Vijay Abraham I /* wait 1ms */ 6337d326930SKishon Vijay Abraham I timeout = ktime_add_ms(ktime_get(), SDHCI_OMAP_TIMEOUT); 6347d326930SKishon Vijay Abraham I while (!(sdhci_omap_readl(omap_host, SDHCI_OMAP_STAT) & INT_CC_EN)) { 6357d326930SKishon Vijay Abraham I if (WARN_ON(ktime_after(ktime_get(), timeout))) 6367d326930SKishon Vijay Abraham I return; 6377d326930SKishon Vijay Abraham I usleep_range(5, 10); 6387d326930SKishon Vijay Abraham I } 6397d326930SKishon Vijay Abraham I 6407d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CON); 6417d326930SKishon Vijay Abraham I reg &= ~CON_INIT; 6427d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_CON, reg); 6437d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_STAT, INT_CC_EN); 6447d326930SKishon Vijay Abraham I 6457d326930SKishon Vijay Abraham I enable_irq(host->irq); 6467d326930SKishon Vijay Abraham I } 6477d326930SKishon Vijay Abraham I 64827ceb7e0SKishon Vijay Abraham I static void sdhci_omap_set_uhs_signaling(struct sdhci_host *host, 64927ceb7e0SKishon Vijay Abraham I unsigned int timing) 65027ceb7e0SKishon Vijay Abraham I { 65127ceb7e0SKishon Vijay Abraham I u32 reg; 65227ceb7e0SKishon Vijay Abraham I struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 65327ceb7e0SKishon Vijay Abraham I struct sdhci_omap_host *omap_host = sdhci_pltfm_priv(pltfm_host); 65427ceb7e0SKishon Vijay Abraham I 65527ceb7e0SKishon Vijay Abraham I sdhci_omap_stop_clock(omap_host); 65627ceb7e0SKishon Vijay Abraham I 65727ceb7e0SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CON); 65827ceb7e0SKishon Vijay Abraham I if (timing == MMC_TIMING_UHS_DDR50 || timing == MMC_TIMING_MMC_DDR52) 65927ceb7e0SKishon Vijay Abraham I reg |= CON_DDR; 66027ceb7e0SKishon Vijay Abraham I else 66127ceb7e0SKishon Vijay Abraham I reg &= ~CON_DDR; 66227ceb7e0SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_CON, reg); 66327ceb7e0SKishon Vijay Abraham I 66427ceb7e0SKishon Vijay Abraham I sdhci_set_uhs_signaling(host, timing); 66527ceb7e0SKishon Vijay Abraham I sdhci_omap_start_clock(omap_host); 66627ceb7e0SKishon Vijay Abraham I } 66727ceb7e0SKishon Vijay Abraham I 6687d326930SKishon Vijay Abraham I static struct sdhci_ops sdhci_omap_ops = { 6697d326930SKishon Vijay Abraham I .set_clock = sdhci_omap_set_clock, 6707d326930SKishon Vijay Abraham I .set_power = sdhci_omap_set_power, 6717d326930SKishon Vijay Abraham I .enable_dma = sdhci_omap_enable_dma, 6727d326930SKishon Vijay Abraham I .get_max_clock = sdhci_pltfm_clk_get_max_clock, 6737d326930SKishon Vijay Abraham I .get_min_clock = sdhci_omap_get_min_clock, 6747d326930SKishon Vijay Abraham I .set_bus_width = sdhci_omap_set_bus_width, 6757d326930SKishon Vijay Abraham I .platform_send_init_74_clocks = sdhci_omap_init_74_clocks, 6767d326930SKishon Vijay Abraham I .reset = sdhci_reset, 67727ceb7e0SKishon Vijay Abraham I .set_uhs_signaling = sdhci_omap_set_uhs_signaling, 6787d326930SKishon Vijay Abraham I }; 6797d326930SKishon Vijay Abraham I 6807d326930SKishon Vijay Abraham I static int sdhci_omap_set_capabilities(struct sdhci_omap_host *omap_host) 6817d326930SKishon Vijay Abraham I { 6827d326930SKishon Vijay Abraham I u32 reg; 6837d326930SKishon Vijay Abraham I int ret = 0; 6847d326930SKishon Vijay Abraham I struct device *dev = omap_host->dev; 6857d326930SKishon Vijay Abraham I struct regulator *vqmmc; 6867d326930SKishon Vijay Abraham I 6877d326930SKishon Vijay Abraham I vqmmc = regulator_get(dev, "vqmmc"); 6887d326930SKishon Vijay Abraham I if (IS_ERR(vqmmc)) { 6897d326930SKishon Vijay Abraham I ret = PTR_ERR(vqmmc); 6907d326930SKishon Vijay Abraham I goto reg_put; 6917d326930SKishon Vijay Abraham I } 6927d326930SKishon Vijay Abraham I 6937d326930SKishon Vijay Abraham I /* voltage capabilities might be set by boot loader, clear it */ 6947d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CAPA); 6957d326930SKishon Vijay Abraham I reg &= ~(CAPA_VS18 | CAPA_VS30 | CAPA_VS33); 6967d326930SKishon Vijay Abraham I 6977d326930SKishon Vijay Abraham I if (regulator_is_supported_voltage(vqmmc, IOV_3V3, IOV_3V3)) 6987d326930SKishon Vijay Abraham I reg |= CAPA_VS33; 6997d326930SKishon Vijay Abraham I if (regulator_is_supported_voltage(vqmmc, IOV_1V8, IOV_1V8)) 7007d326930SKishon Vijay Abraham I reg |= CAPA_VS18; 7017d326930SKishon Vijay Abraham I 7027d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_CAPA, reg); 7037d326930SKishon Vijay Abraham I 7047d326930SKishon Vijay Abraham I reg_put: 7057d326930SKishon Vijay Abraham I regulator_put(vqmmc); 7067d326930SKishon Vijay Abraham I 7077d326930SKishon Vijay Abraham I return ret; 7087d326930SKishon Vijay Abraham I } 7097d326930SKishon Vijay Abraham I 7107d326930SKishon Vijay Abraham I static const struct sdhci_pltfm_data sdhci_omap_pdata = { 7117d326930SKishon Vijay Abraham I .quirks = SDHCI_QUIRK_BROKEN_CARD_DETECTION | 7127d326930SKishon Vijay Abraham I SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK | 7137d326930SKishon Vijay Abraham I SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN | 7147d326930SKishon Vijay Abraham I SDHCI_QUIRK_NO_HISPD_BIT | 7157d326930SKishon Vijay Abraham I SDHCI_QUIRK_BROKEN_ADMA_ZEROLEN_DESC, 716e0b2dbcfSKishon Vijay Abraham I .quirks2 = SDHCI_QUIRK2_ACMD23_BROKEN | 717e0b2dbcfSKishon Vijay Abraham I SDHCI_QUIRK2_PRESET_VALUE_BROKEN | 7187d326930SKishon Vijay Abraham I SDHCI_QUIRK2_RSP_136_HAS_CRC, 7197d326930SKishon Vijay Abraham I .ops = &sdhci_omap_ops, 7207d326930SKishon Vijay Abraham I }; 7217d326930SKishon Vijay Abraham I 7227d326930SKishon Vijay Abraham I static const struct sdhci_omap_data dra7_data = { 7237d326930SKishon Vijay Abraham I .offset = 0x200, 7248d20b2eaSKishon Vijay Abraham I .flags = SDHCI_OMAP_REQUIRE_IODELAY, 7257d326930SKishon Vijay Abraham I }; 7267d326930SKishon Vijay Abraham I 7277d326930SKishon Vijay Abraham I static const struct of_device_id omap_sdhci_match[] = { 7287d326930SKishon Vijay Abraham I { .compatible = "ti,dra7-sdhci", .data = &dra7_data }, 7297d326930SKishon Vijay Abraham I {}, 7307d326930SKishon Vijay Abraham I }; 7317d326930SKishon Vijay Abraham I MODULE_DEVICE_TABLE(of, omap_sdhci_match); 7327d326930SKishon Vijay Abraham I 7338d20b2eaSKishon Vijay Abraham I static struct pinctrl_state 7348d20b2eaSKishon Vijay Abraham I *sdhci_omap_iodelay_pinctrl_state(struct sdhci_omap_host *omap_host, char *mode, 7358d20b2eaSKishon Vijay Abraham I u32 *caps, u32 capmask) 7368d20b2eaSKishon Vijay Abraham I { 7378d20b2eaSKishon Vijay Abraham I struct device *dev = omap_host->dev; 738212f4f8aSKishon Vijay Abraham I char *version = omap_host->version; 7398d20b2eaSKishon Vijay Abraham I struct pinctrl_state *pinctrl_state = ERR_PTR(-ENODEV); 740212f4f8aSKishon Vijay Abraham I char str[20]; 7418d20b2eaSKishon Vijay Abraham I 7428d20b2eaSKishon Vijay Abraham I if (!(*caps & capmask)) 7438d20b2eaSKishon Vijay Abraham I goto ret; 7448d20b2eaSKishon Vijay Abraham I 745212f4f8aSKishon Vijay Abraham I if (version) { 746212f4f8aSKishon Vijay Abraham I snprintf(str, 20, "%s-%s", mode, version); 747212f4f8aSKishon Vijay Abraham I pinctrl_state = pinctrl_lookup_state(omap_host->pinctrl, str); 748212f4f8aSKishon Vijay Abraham I } 749212f4f8aSKishon Vijay Abraham I 750212f4f8aSKishon Vijay Abraham I if (IS_ERR(pinctrl_state)) 7518d20b2eaSKishon Vijay Abraham I pinctrl_state = pinctrl_lookup_state(omap_host->pinctrl, mode); 752212f4f8aSKishon Vijay Abraham I 7538d20b2eaSKishon Vijay Abraham I if (IS_ERR(pinctrl_state)) { 7548d20b2eaSKishon Vijay Abraham I dev_err(dev, "no pinctrl state for %s mode", mode); 7558d20b2eaSKishon Vijay Abraham I *caps &= ~capmask; 7568d20b2eaSKishon Vijay Abraham I } 7578d20b2eaSKishon Vijay Abraham I 7588d20b2eaSKishon Vijay Abraham I ret: 7598d20b2eaSKishon Vijay Abraham I return pinctrl_state; 7608d20b2eaSKishon Vijay Abraham I } 7618d20b2eaSKishon Vijay Abraham I 7628d20b2eaSKishon Vijay Abraham I static int sdhci_omap_config_iodelay_pinctrl_state(struct sdhci_omap_host 7638d20b2eaSKishon Vijay Abraham I *omap_host) 7648d20b2eaSKishon Vijay Abraham I { 7658d20b2eaSKishon Vijay Abraham I struct device *dev = omap_host->dev; 7668d20b2eaSKishon Vijay Abraham I struct sdhci_host *host = omap_host->host; 7678d20b2eaSKishon Vijay Abraham I struct mmc_host *mmc = host->mmc; 7688d20b2eaSKishon Vijay Abraham I u32 *caps = &mmc->caps; 7698d20b2eaSKishon Vijay Abraham I u32 *caps2 = &mmc->caps2; 7708d20b2eaSKishon Vijay Abraham I struct pinctrl_state *state; 7718d20b2eaSKishon Vijay Abraham I struct pinctrl_state **pinctrl_state; 7728d20b2eaSKishon Vijay Abraham I 7738d20b2eaSKishon Vijay Abraham I if (!(omap_host->flags & SDHCI_OMAP_REQUIRE_IODELAY)) 7748d20b2eaSKishon Vijay Abraham I return 0; 7758d20b2eaSKishon Vijay Abraham I 7768d20b2eaSKishon Vijay Abraham I pinctrl_state = devm_kzalloc(dev, sizeof(*pinctrl_state) * 7778d20b2eaSKishon Vijay Abraham I (MMC_TIMING_MMC_HS200 + 1), GFP_KERNEL); 7788d20b2eaSKishon Vijay Abraham I if (!pinctrl_state) 7798d20b2eaSKishon Vijay Abraham I return -ENOMEM; 7808d20b2eaSKishon Vijay Abraham I 7818d20b2eaSKishon Vijay Abraham I omap_host->pinctrl = devm_pinctrl_get(omap_host->dev); 7828d20b2eaSKishon Vijay Abraham I if (IS_ERR(omap_host->pinctrl)) { 7838d20b2eaSKishon Vijay Abraham I dev_err(dev, "Cannot get pinctrl\n"); 7848d20b2eaSKishon Vijay Abraham I return PTR_ERR(omap_host->pinctrl); 7858d20b2eaSKishon Vijay Abraham I } 7868d20b2eaSKishon Vijay Abraham I 7878d20b2eaSKishon Vijay Abraham I state = pinctrl_lookup_state(omap_host->pinctrl, "default"); 7888d20b2eaSKishon Vijay Abraham I if (IS_ERR(state)) { 7898d20b2eaSKishon Vijay Abraham I dev_err(dev, "no pinctrl state for default mode\n"); 7908d20b2eaSKishon Vijay Abraham I return PTR_ERR(state); 7918d20b2eaSKishon Vijay Abraham I } 7928d20b2eaSKishon Vijay Abraham I pinctrl_state[MMC_TIMING_LEGACY] = state; 7938d20b2eaSKishon Vijay Abraham I 7948d20b2eaSKishon Vijay Abraham I state = sdhci_omap_iodelay_pinctrl_state(omap_host, "sdr104", caps, 7958d20b2eaSKishon Vijay Abraham I MMC_CAP_UHS_SDR104); 7968d20b2eaSKishon Vijay Abraham I if (!IS_ERR(state)) 7978d20b2eaSKishon Vijay Abraham I pinctrl_state[MMC_TIMING_UHS_SDR104] = state; 7988d20b2eaSKishon Vijay Abraham I 7998d20b2eaSKishon Vijay Abraham I state = sdhci_omap_iodelay_pinctrl_state(omap_host, "ddr50", caps, 8008d20b2eaSKishon Vijay Abraham I MMC_CAP_UHS_DDR50); 8018d20b2eaSKishon Vijay Abraham I if (!IS_ERR(state)) 8028d20b2eaSKishon Vijay Abraham I pinctrl_state[MMC_TIMING_UHS_DDR50] = state; 8038d20b2eaSKishon Vijay Abraham I 8048d20b2eaSKishon Vijay Abraham I state = sdhci_omap_iodelay_pinctrl_state(omap_host, "sdr50", caps, 8058d20b2eaSKishon Vijay Abraham I MMC_CAP_UHS_SDR50); 8068d20b2eaSKishon Vijay Abraham I if (!IS_ERR(state)) 8078d20b2eaSKishon Vijay Abraham I pinctrl_state[MMC_TIMING_UHS_SDR50] = state; 8088d20b2eaSKishon Vijay Abraham I 8098d20b2eaSKishon Vijay Abraham I state = sdhci_omap_iodelay_pinctrl_state(omap_host, "sdr25", caps, 8108d20b2eaSKishon Vijay Abraham I MMC_CAP_UHS_SDR25); 8118d20b2eaSKishon Vijay Abraham I if (!IS_ERR(state)) 8128d20b2eaSKishon Vijay Abraham I pinctrl_state[MMC_TIMING_UHS_SDR25] = state; 8138d20b2eaSKishon Vijay Abraham I 8148d20b2eaSKishon Vijay Abraham I state = sdhci_omap_iodelay_pinctrl_state(omap_host, "sdr12", caps, 8158d20b2eaSKishon Vijay Abraham I MMC_CAP_UHS_SDR12); 8168d20b2eaSKishon Vijay Abraham I if (!IS_ERR(state)) 8178d20b2eaSKishon Vijay Abraham I pinctrl_state[MMC_TIMING_UHS_SDR12] = state; 8188d20b2eaSKishon Vijay Abraham I 8198d20b2eaSKishon Vijay Abraham I state = sdhci_omap_iodelay_pinctrl_state(omap_host, "ddr_1_8v", caps, 8208d20b2eaSKishon Vijay Abraham I MMC_CAP_1_8V_DDR); 8218d20b2eaSKishon Vijay Abraham I if (!IS_ERR(state)) 8228d20b2eaSKishon Vijay Abraham I pinctrl_state[MMC_TIMING_MMC_DDR52] = state; 8238d20b2eaSKishon Vijay Abraham I 8248d20b2eaSKishon Vijay Abraham I state = sdhci_omap_iodelay_pinctrl_state(omap_host, "hs", caps, 8258d20b2eaSKishon Vijay Abraham I MMC_CAP_SD_HIGHSPEED); 8268d20b2eaSKishon Vijay Abraham I if (!IS_ERR(state)) 8278d20b2eaSKishon Vijay Abraham I pinctrl_state[MMC_TIMING_SD_HS] = state; 8288d20b2eaSKishon Vijay Abraham I 8298d20b2eaSKishon Vijay Abraham I state = sdhci_omap_iodelay_pinctrl_state(omap_host, "hs", caps, 8308d20b2eaSKishon Vijay Abraham I MMC_CAP_MMC_HIGHSPEED); 8318d20b2eaSKishon Vijay Abraham I if (!IS_ERR(state)) 8328d20b2eaSKishon Vijay Abraham I pinctrl_state[MMC_TIMING_MMC_HS] = state; 8338d20b2eaSKishon Vijay Abraham I 8348d20b2eaSKishon Vijay Abraham I state = sdhci_omap_iodelay_pinctrl_state(omap_host, "hs200_1_8v", caps2, 8358d20b2eaSKishon Vijay Abraham I MMC_CAP2_HS200_1_8V_SDR); 8368d20b2eaSKishon Vijay Abraham I if (!IS_ERR(state)) 8378d20b2eaSKishon Vijay Abraham I pinctrl_state[MMC_TIMING_MMC_HS200] = state; 8388d20b2eaSKishon Vijay Abraham I 8398d20b2eaSKishon Vijay Abraham I omap_host->pinctrl_state = pinctrl_state; 8408d20b2eaSKishon Vijay Abraham I 8418d20b2eaSKishon Vijay Abraham I return 0; 8428d20b2eaSKishon Vijay Abraham I } 8438d20b2eaSKishon Vijay Abraham I 844212f4f8aSKishon Vijay Abraham I static const struct soc_device_attribute sdhci_omap_soc_devices[] = { 845212f4f8aSKishon Vijay Abraham I { 846212f4f8aSKishon Vijay Abraham I .machine = "DRA7[45]*", 847212f4f8aSKishon Vijay Abraham I .revision = "ES1.[01]", 848212f4f8aSKishon Vijay Abraham I }, 849212f4f8aSKishon Vijay Abraham I { 850212f4f8aSKishon Vijay Abraham I /* sentinel */ 851212f4f8aSKishon Vijay Abraham I } 852212f4f8aSKishon Vijay Abraham I }; 853212f4f8aSKishon Vijay Abraham I 8547d326930SKishon Vijay Abraham I static int sdhci_omap_probe(struct platform_device *pdev) 8557d326930SKishon Vijay Abraham I { 8567d326930SKishon Vijay Abraham I int ret; 8577d326930SKishon Vijay Abraham I u32 offset; 8587d326930SKishon Vijay Abraham I struct device *dev = &pdev->dev; 8597d326930SKishon Vijay Abraham I struct sdhci_host *host; 8607d326930SKishon Vijay Abraham I struct sdhci_pltfm_host *pltfm_host; 8617d326930SKishon Vijay Abraham I struct sdhci_omap_host *omap_host; 8627d326930SKishon Vijay Abraham I struct mmc_host *mmc; 8637d326930SKishon Vijay Abraham I const struct of_device_id *match; 8647d326930SKishon Vijay Abraham I struct sdhci_omap_data *data; 865212f4f8aSKishon Vijay Abraham I const struct soc_device_attribute *soc; 8667d326930SKishon Vijay Abraham I 8677d326930SKishon Vijay Abraham I match = of_match_device(omap_sdhci_match, dev); 8687d326930SKishon Vijay Abraham I if (!match) 8697d326930SKishon Vijay Abraham I return -EINVAL; 8707d326930SKishon Vijay Abraham I 8717d326930SKishon Vijay Abraham I data = (struct sdhci_omap_data *)match->data; 8727d326930SKishon Vijay Abraham I if (!data) { 8737d326930SKishon Vijay Abraham I dev_err(dev, "no sdhci omap data\n"); 8747d326930SKishon Vijay Abraham I return -EINVAL; 8757d326930SKishon Vijay Abraham I } 8767d326930SKishon Vijay Abraham I offset = data->offset; 8777d326930SKishon Vijay Abraham I 8787d326930SKishon Vijay Abraham I host = sdhci_pltfm_init(pdev, &sdhci_omap_pdata, 8797d326930SKishon Vijay Abraham I sizeof(*omap_host)); 8807d326930SKishon Vijay Abraham I if (IS_ERR(host)) { 8817d326930SKishon Vijay Abraham I dev_err(dev, "Failed sdhci_pltfm_init\n"); 8827d326930SKishon Vijay Abraham I return PTR_ERR(host); 8837d326930SKishon Vijay Abraham I } 8847d326930SKishon Vijay Abraham I 8857d326930SKishon Vijay Abraham I pltfm_host = sdhci_priv(host); 8867d326930SKishon Vijay Abraham I omap_host = sdhci_pltfm_priv(pltfm_host); 8877d326930SKishon Vijay Abraham I omap_host->host = host; 8887d326930SKishon Vijay Abraham I omap_host->base = host->ioaddr; 8897d326930SKishon Vijay Abraham I omap_host->dev = dev; 890300df508SKishon Vijay Abraham I omap_host->power_mode = MMC_POWER_UNDEFINED; 8918d20b2eaSKishon Vijay Abraham I omap_host->timing = MMC_TIMING_LEGACY; 8928d20b2eaSKishon Vijay Abraham I omap_host->flags = data->flags; 8937d326930SKishon Vijay Abraham I host->ioaddr += offset; 8947d326930SKishon Vijay Abraham I 8957d326930SKishon Vijay Abraham I mmc = host->mmc; 8967d326930SKishon Vijay Abraham I ret = mmc_of_parse(mmc); 8977d326930SKishon Vijay Abraham I if (ret) 8987d326930SKishon Vijay Abraham I goto err_pltfm_free; 8997d326930SKishon Vijay Abraham I 900212f4f8aSKishon Vijay Abraham I soc = soc_device_match(sdhci_omap_soc_devices); 901212f4f8aSKishon Vijay Abraham I if (soc) { 902212f4f8aSKishon Vijay Abraham I omap_host->version = "rev11"; 903212f4f8aSKishon Vijay Abraham I if (!strcmp(dev_name(dev), "4809c000.mmc")) 904212f4f8aSKishon Vijay Abraham I mmc->f_max = 96000000; 905212f4f8aSKishon Vijay Abraham I if (!strcmp(dev_name(dev), "480b4000.mmc")) 906212f4f8aSKishon Vijay Abraham I mmc->f_max = 48000000; 907212f4f8aSKishon Vijay Abraham I if (!strcmp(dev_name(dev), "480ad000.mmc")) 908212f4f8aSKishon Vijay Abraham I mmc->f_max = 48000000; 909212f4f8aSKishon Vijay Abraham I } 910212f4f8aSKishon Vijay Abraham I 9117d326930SKishon Vijay Abraham I pltfm_host->clk = devm_clk_get(dev, "fck"); 9127d326930SKishon Vijay Abraham I if (IS_ERR(pltfm_host->clk)) { 9137d326930SKishon Vijay Abraham I ret = PTR_ERR(pltfm_host->clk); 9147d326930SKishon Vijay Abraham I goto err_pltfm_free; 9157d326930SKishon Vijay Abraham I } 9167d326930SKishon Vijay Abraham I 9177d326930SKishon Vijay Abraham I ret = clk_set_rate(pltfm_host->clk, mmc->f_max); 9187d326930SKishon Vijay Abraham I if (ret) { 9197d326930SKishon Vijay Abraham I dev_err(dev, "failed to set clock to %d\n", mmc->f_max); 9207d326930SKishon Vijay Abraham I goto err_pltfm_free; 9217d326930SKishon Vijay Abraham I } 9227d326930SKishon Vijay Abraham I 9237d326930SKishon Vijay Abraham I omap_host->pbias = devm_regulator_get_optional(dev, "pbias"); 9247d326930SKishon Vijay Abraham I if (IS_ERR(omap_host->pbias)) { 9257d326930SKishon Vijay Abraham I ret = PTR_ERR(omap_host->pbias); 9267d326930SKishon Vijay Abraham I if (ret != -ENODEV) 9277d326930SKishon Vijay Abraham I goto err_pltfm_free; 9287d326930SKishon Vijay Abraham I dev_dbg(dev, "unable to get pbias regulator %d\n", ret); 9297d326930SKishon Vijay Abraham I } 9307d326930SKishon Vijay Abraham I omap_host->pbias_enabled = false; 9317d326930SKishon Vijay Abraham I 9327d326930SKishon Vijay Abraham I /* 9337d326930SKishon Vijay Abraham I * omap_device_pm_domain has callbacks to enable the main 9347d326930SKishon Vijay Abraham I * functional clock, interface clock and also configure the 9357d326930SKishon Vijay Abraham I * SYSCONFIG register of omap devices. The callback will be invoked 9367d326930SKishon Vijay Abraham I * as part of pm_runtime_get_sync. 9377d326930SKishon Vijay Abraham I */ 9387d326930SKishon Vijay Abraham I pm_runtime_enable(dev); 9397d326930SKishon Vijay Abraham I ret = pm_runtime_get_sync(dev); 9407d326930SKishon Vijay Abraham I if (ret < 0) { 9417d326930SKishon Vijay Abraham I dev_err(dev, "pm_runtime_get_sync failed\n"); 9427d326930SKishon Vijay Abraham I pm_runtime_put_noidle(dev); 9437d326930SKishon Vijay Abraham I goto err_rpm_disable; 9447d326930SKishon Vijay Abraham I } 9457d326930SKishon Vijay Abraham I 9467d326930SKishon Vijay Abraham I ret = sdhci_omap_set_capabilities(omap_host); 9477d326930SKishon Vijay Abraham I if (ret) { 9487d326930SKishon Vijay Abraham I dev_err(dev, "failed to set system capabilities\n"); 9497d326930SKishon Vijay Abraham I goto err_put_sync; 9507d326930SKishon Vijay Abraham I } 9517d326930SKishon Vijay Abraham I 9527d326930SKishon Vijay Abraham I host->mmc_host_ops.get_ro = mmc_gpio_get_ro; 9537d326930SKishon Vijay Abraham I host->mmc_host_ops.start_signal_voltage_switch = 9547d326930SKishon Vijay Abraham I sdhci_omap_start_signal_voltage_switch; 9557d326930SKishon Vijay Abraham I host->mmc_host_ops.set_ios = sdhci_omap_set_ios; 95620ea26a1SKishon Vijay Abraham I host->mmc_host_ops.card_busy = sdhci_omap_card_busy; 9579fc2cd76SKishon Vijay Abraham I host->mmc_host_ops.execute_tuning = sdhci_omap_execute_tuning; 9587d326930SKishon Vijay Abraham I 9590ec4ee3cSKishon Vijay Abraham I ret = sdhci_setup_host(host); 9607d326930SKishon Vijay Abraham I if (ret) 9617d326930SKishon Vijay Abraham I goto err_put_sync; 9627d326930SKishon Vijay Abraham I 9630ec4ee3cSKishon Vijay Abraham I ret = sdhci_omap_config_iodelay_pinctrl_state(omap_host); 9640ec4ee3cSKishon Vijay Abraham I if (ret) 9650ec4ee3cSKishon Vijay Abraham I goto err_cleanup_host; 9660ec4ee3cSKishon Vijay Abraham I 9670ec4ee3cSKishon Vijay Abraham I ret = __sdhci_add_host(host); 9680ec4ee3cSKishon Vijay Abraham I if (ret) 9690ec4ee3cSKishon Vijay Abraham I goto err_cleanup_host; 9700ec4ee3cSKishon Vijay Abraham I 9717d326930SKishon Vijay Abraham I return 0; 9727d326930SKishon Vijay Abraham I 9730ec4ee3cSKishon Vijay Abraham I err_cleanup_host: 9740ec4ee3cSKishon Vijay Abraham I sdhci_cleanup_host(host); 9750ec4ee3cSKishon Vijay Abraham I 9767d326930SKishon Vijay Abraham I err_put_sync: 9777d326930SKishon Vijay Abraham I pm_runtime_put_sync(dev); 9787d326930SKishon Vijay Abraham I 9797d326930SKishon Vijay Abraham I err_rpm_disable: 9807d326930SKishon Vijay Abraham I pm_runtime_disable(dev); 9817d326930SKishon Vijay Abraham I 9827d326930SKishon Vijay Abraham I err_pltfm_free: 9837d326930SKishon Vijay Abraham I sdhci_pltfm_free(pdev); 9847d326930SKishon Vijay Abraham I return ret; 9857d326930SKishon Vijay Abraham I } 9867d326930SKishon Vijay Abraham I 9877d326930SKishon Vijay Abraham I static int sdhci_omap_remove(struct platform_device *pdev) 9887d326930SKishon Vijay Abraham I { 9897d326930SKishon Vijay Abraham I struct device *dev = &pdev->dev; 9907d326930SKishon Vijay Abraham I struct sdhci_host *host = platform_get_drvdata(pdev); 9917d326930SKishon Vijay Abraham I 9927d326930SKishon Vijay Abraham I sdhci_remove_host(host, true); 9937d326930SKishon Vijay Abraham I pm_runtime_put_sync(dev); 9947d326930SKishon Vijay Abraham I pm_runtime_disable(dev); 9957d326930SKishon Vijay Abraham I sdhci_pltfm_free(pdev); 9967d326930SKishon Vijay Abraham I 9977d326930SKishon Vijay Abraham I return 0; 9987d326930SKishon Vijay Abraham I } 9997d326930SKishon Vijay Abraham I 10007d326930SKishon Vijay Abraham I static struct platform_driver sdhci_omap_driver = { 10017d326930SKishon Vijay Abraham I .probe = sdhci_omap_probe, 10027d326930SKishon Vijay Abraham I .remove = sdhci_omap_remove, 10037d326930SKishon Vijay Abraham I .driver = { 10047d326930SKishon Vijay Abraham I .name = "sdhci-omap", 10057d326930SKishon Vijay Abraham I .of_match_table = omap_sdhci_match, 10067d326930SKishon Vijay Abraham I }, 10077d326930SKishon Vijay Abraham I }; 10087d326930SKishon Vijay Abraham I 10097d326930SKishon Vijay Abraham I module_platform_driver(sdhci_omap_driver); 10107d326930SKishon Vijay Abraham I 10117d326930SKishon Vijay Abraham I MODULE_DESCRIPTION("SDHCI driver for OMAP SoCs"); 10127d326930SKishon Vijay Abraham I MODULE_AUTHOR("Texas Instruments Inc."); 10137d326930SKishon Vijay Abraham I MODULE_LICENSE("GPL v2"); 10147d326930SKishon Vijay Abraham I MODULE_ALIAS("platform:sdhci_omap"); 1015