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> 287d326930SKishon Vijay Abraham I 297d326930SKishon Vijay Abraham I #include "sdhci-pltfm.h" 307d326930SKishon Vijay Abraham I 317d326930SKishon Vijay Abraham I #define SDHCI_OMAP_CON 0x12c 327d326930SKishon Vijay Abraham I #define CON_DW8 BIT(5) 337d326930SKishon Vijay Abraham I #define CON_DMA_MASTER BIT(20) 3427ceb7e0SKishon Vijay Abraham I #define CON_DDR BIT(19) 3520ea26a1SKishon Vijay Abraham I #define CON_CLKEXTFREE BIT(16) 3620ea26a1SKishon Vijay Abraham I #define CON_PADEN BIT(15) 377d326930SKishon Vijay Abraham I #define CON_INIT BIT(1) 387d326930SKishon Vijay Abraham I #define CON_OD BIT(0) 397d326930SKishon Vijay Abraham I 409fc2cd76SKishon Vijay Abraham I #define SDHCI_OMAP_DLL 0x0134 419fc2cd76SKishon Vijay Abraham I #define DLL_SWT BIT(20) 429fc2cd76SKishon Vijay Abraham I #define DLL_FORCE_SR_C_SHIFT 13 439fc2cd76SKishon Vijay Abraham I #define DLL_FORCE_SR_C_MASK (0x7f << DLL_FORCE_SR_C_SHIFT) 449fc2cd76SKishon Vijay Abraham I #define DLL_FORCE_VALUE BIT(12) 459fc2cd76SKishon Vijay Abraham I #define DLL_CALIB BIT(1) 469fc2cd76SKishon Vijay Abraham I 477d326930SKishon Vijay Abraham I #define SDHCI_OMAP_CMD 0x20c 487d326930SKishon Vijay Abraham I 4920ea26a1SKishon Vijay Abraham I #define SDHCI_OMAP_PSTATE 0x0224 5020ea26a1SKishon Vijay Abraham I #define PSTATE_DLEV_DAT0 BIT(20) 5120ea26a1SKishon Vijay Abraham I #define PSTATE_DATI BIT(1) 5220ea26a1SKishon Vijay Abraham I 537d326930SKishon Vijay Abraham I #define SDHCI_OMAP_HCTL 0x228 547d326930SKishon Vijay Abraham I #define HCTL_SDBP BIT(8) 557d326930SKishon Vijay Abraham I #define HCTL_SDVS_SHIFT 9 567d326930SKishon Vijay Abraham I #define HCTL_SDVS_MASK (0x7 << HCTL_SDVS_SHIFT) 577d326930SKishon Vijay Abraham I #define HCTL_SDVS_33 (0x7 << HCTL_SDVS_SHIFT) 587d326930SKishon Vijay Abraham I #define HCTL_SDVS_30 (0x6 << HCTL_SDVS_SHIFT) 597d326930SKishon Vijay Abraham I #define HCTL_SDVS_18 (0x5 << HCTL_SDVS_SHIFT) 607d326930SKishon Vijay Abraham I 617d326930SKishon Vijay Abraham I #define SDHCI_OMAP_SYSCTL 0x22c 627d326930SKishon Vijay Abraham I #define SYSCTL_CEN BIT(2) 637d326930SKishon Vijay Abraham I #define SYSCTL_CLKD_SHIFT 6 647d326930SKishon Vijay Abraham I #define SYSCTL_CLKD_MASK 0x3ff 657d326930SKishon Vijay Abraham I 667d326930SKishon Vijay Abraham I #define SDHCI_OMAP_STAT 0x230 677d326930SKishon Vijay Abraham I 687d326930SKishon Vijay Abraham I #define SDHCI_OMAP_IE 0x234 697d326930SKishon Vijay Abraham I #define INT_CC_EN BIT(0) 707d326930SKishon Vijay Abraham I 717d326930SKishon Vijay Abraham I #define SDHCI_OMAP_AC12 0x23c 727d326930SKishon Vijay Abraham I #define AC12_V1V8_SIGEN BIT(19) 739fc2cd76SKishon Vijay Abraham I #define AC12_SCLK_SEL BIT(23) 747d326930SKishon Vijay Abraham I 757d326930SKishon Vijay Abraham I #define SDHCI_OMAP_CAPA 0x240 767d326930SKishon Vijay Abraham I #define CAPA_VS33 BIT(24) 777d326930SKishon Vijay Abraham I #define CAPA_VS30 BIT(25) 787d326930SKishon Vijay Abraham I #define CAPA_VS18 BIT(26) 797d326930SKishon Vijay Abraham I 809fc2cd76SKishon Vijay Abraham I #define SDHCI_OMAP_CAPA2 0x0244 819fc2cd76SKishon Vijay Abraham I #define CAPA2_TSDR50 BIT(13) 829fc2cd76SKishon Vijay Abraham I 837d326930SKishon Vijay Abraham I #define SDHCI_OMAP_TIMEOUT 1 /* 1 msec */ 847d326930SKishon Vijay Abraham I 857d326930SKishon Vijay Abraham I #define SYSCTL_CLKD_MAX 0x3FF 867d326930SKishon Vijay Abraham I 877d326930SKishon Vijay Abraham I #define IOV_1V8 1800000 /* 180000 uV */ 887d326930SKishon Vijay Abraham I #define IOV_3V0 3000000 /* 300000 uV */ 897d326930SKishon Vijay Abraham I #define IOV_3V3 3300000 /* 330000 uV */ 907d326930SKishon Vijay Abraham I 919fc2cd76SKishon Vijay Abraham I #define MAX_PHASE_DELAY 0x7C 929fc2cd76SKishon Vijay Abraham I 937d326930SKishon Vijay Abraham I struct sdhci_omap_data { 947d326930SKishon Vijay Abraham I u32 offset; 957d326930SKishon Vijay Abraham I }; 967d326930SKishon Vijay Abraham I 977d326930SKishon Vijay Abraham I struct sdhci_omap_host { 987d326930SKishon Vijay Abraham I void __iomem *base; 997d326930SKishon Vijay Abraham I struct device *dev; 1007d326930SKishon Vijay Abraham I struct regulator *pbias; 1017d326930SKishon Vijay Abraham I bool pbias_enabled; 1027d326930SKishon Vijay Abraham I struct sdhci_host *host; 1037d326930SKishon Vijay Abraham I u8 bus_mode; 1047d326930SKishon Vijay Abraham I u8 power_mode; 1057d326930SKishon Vijay Abraham I }; 1067d326930SKishon Vijay Abraham I 1077d326930SKishon Vijay Abraham I static inline u32 sdhci_omap_readl(struct sdhci_omap_host *host, 1087d326930SKishon Vijay Abraham I unsigned int offset) 1097d326930SKishon Vijay Abraham I { 1107d326930SKishon Vijay Abraham I return readl(host->base + offset); 1117d326930SKishon Vijay Abraham I } 1127d326930SKishon Vijay Abraham I 1137d326930SKishon Vijay Abraham I static inline void sdhci_omap_writel(struct sdhci_omap_host *host, 1147d326930SKishon Vijay Abraham I unsigned int offset, u32 data) 1157d326930SKishon Vijay Abraham I { 1167d326930SKishon Vijay Abraham I writel(data, host->base + offset); 1177d326930SKishon Vijay Abraham I } 1187d326930SKishon Vijay Abraham I 1197d326930SKishon Vijay Abraham I static int sdhci_omap_set_pbias(struct sdhci_omap_host *omap_host, 1207d326930SKishon Vijay Abraham I bool power_on, unsigned int iov) 1217d326930SKishon Vijay Abraham I { 1227d326930SKishon Vijay Abraham I int ret; 1237d326930SKishon Vijay Abraham I struct device *dev = omap_host->dev; 1247d326930SKishon Vijay Abraham I 1257d326930SKishon Vijay Abraham I if (IS_ERR(omap_host->pbias)) 1267d326930SKishon Vijay Abraham I return 0; 1277d326930SKishon Vijay Abraham I 1287d326930SKishon Vijay Abraham I if (power_on) { 1297d326930SKishon Vijay Abraham I ret = regulator_set_voltage(omap_host->pbias, iov, iov); 1307d326930SKishon Vijay Abraham I if (ret) { 1317d326930SKishon Vijay Abraham I dev_err(dev, "pbias set voltage failed\n"); 1327d326930SKishon Vijay Abraham I return ret; 1337d326930SKishon Vijay Abraham I } 1347d326930SKishon Vijay Abraham I 1357d326930SKishon Vijay Abraham I if (omap_host->pbias_enabled) 1367d326930SKishon Vijay Abraham I return 0; 1377d326930SKishon Vijay Abraham I 1387d326930SKishon Vijay Abraham I ret = regulator_enable(omap_host->pbias); 1397d326930SKishon Vijay Abraham I if (ret) { 1407d326930SKishon Vijay Abraham I dev_err(dev, "pbias reg enable fail\n"); 1417d326930SKishon Vijay Abraham I return ret; 1427d326930SKishon Vijay Abraham I } 1437d326930SKishon Vijay Abraham I 1447d326930SKishon Vijay Abraham I omap_host->pbias_enabled = true; 1457d326930SKishon Vijay Abraham I } else { 1467d326930SKishon Vijay Abraham I if (!omap_host->pbias_enabled) 1477d326930SKishon Vijay Abraham I return 0; 1487d326930SKishon Vijay Abraham I 1497d326930SKishon Vijay Abraham I ret = regulator_disable(omap_host->pbias); 1507d326930SKishon Vijay Abraham I if (ret) { 1517d326930SKishon Vijay Abraham I dev_err(dev, "pbias reg disable fail\n"); 1527d326930SKishon Vijay Abraham I return ret; 1537d326930SKishon Vijay Abraham I } 1547d326930SKishon Vijay Abraham I omap_host->pbias_enabled = false; 1557d326930SKishon Vijay Abraham I } 1567d326930SKishon Vijay Abraham I 1577d326930SKishon Vijay Abraham I return 0; 1587d326930SKishon Vijay Abraham I } 1597d326930SKishon Vijay Abraham I 1607d326930SKishon Vijay Abraham I static int sdhci_omap_enable_iov(struct sdhci_omap_host *omap_host, 1617d326930SKishon Vijay Abraham I unsigned int iov) 1627d326930SKishon Vijay Abraham I { 1637d326930SKishon Vijay Abraham I int ret; 1647d326930SKishon Vijay Abraham I struct sdhci_host *host = omap_host->host; 1657d326930SKishon Vijay Abraham I struct mmc_host *mmc = host->mmc; 1667d326930SKishon Vijay Abraham I 1677d326930SKishon Vijay Abraham I ret = sdhci_omap_set_pbias(omap_host, false, 0); 1687d326930SKishon Vijay Abraham I if (ret) 1697d326930SKishon Vijay Abraham I return ret; 1707d326930SKishon Vijay Abraham I 1717d326930SKishon Vijay Abraham I if (!IS_ERR(mmc->supply.vqmmc)) { 1727d326930SKishon Vijay Abraham I ret = regulator_set_voltage(mmc->supply.vqmmc, iov, iov); 1737d326930SKishon Vijay Abraham I if (ret) { 1747d326930SKishon Vijay Abraham I dev_err(mmc_dev(mmc), "vqmmc set voltage failed\n"); 1757d326930SKishon Vijay Abraham I return ret; 1767d326930SKishon Vijay Abraham I } 1777d326930SKishon Vijay Abraham I } 1787d326930SKishon Vijay Abraham I 1797d326930SKishon Vijay Abraham I ret = sdhci_omap_set_pbias(omap_host, true, iov); 1807d326930SKishon Vijay Abraham I if (ret) 1817d326930SKishon Vijay Abraham I return ret; 1827d326930SKishon Vijay Abraham I 1837d326930SKishon Vijay Abraham I return 0; 1847d326930SKishon Vijay Abraham I } 1857d326930SKishon Vijay Abraham I 1867d326930SKishon Vijay Abraham I static void sdhci_omap_conf_bus_power(struct sdhci_omap_host *omap_host, 1877d326930SKishon Vijay Abraham I unsigned char signal_voltage) 1887d326930SKishon Vijay Abraham I { 1897d326930SKishon Vijay Abraham I u32 reg; 1907d326930SKishon Vijay Abraham I ktime_t timeout; 1917d326930SKishon Vijay Abraham I 1927d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_HCTL); 1937d326930SKishon Vijay Abraham I reg &= ~HCTL_SDVS_MASK; 1947d326930SKishon Vijay Abraham I 1957d326930SKishon Vijay Abraham I if (signal_voltage == MMC_SIGNAL_VOLTAGE_330) 1967d326930SKishon Vijay Abraham I reg |= HCTL_SDVS_33; 1977d326930SKishon Vijay Abraham I else 1987d326930SKishon Vijay Abraham I reg |= HCTL_SDVS_18; 1997d326930SKishon Vijay Abraham I 2007d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_HCTL, reg); 2017d326930SKishon Vijay Abraham I 2027d326930SKishon Vijay Abraham I reg |= HCTL_SDBP; 2037d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_HCTL, reg); 2047d326930SKishon Vijay Abraham I 2057d326930SKishon Vijay Abraham I /* wait 1ms */ 2067d326930SKishon Vijay Abraham I timeout = ktime_add_ms(ktime_get(), SDHCI_OMAP_TIMEOUT); 2077d326930SKishon Vijay Abraham I while (!(sdhci_omap_readl(omap_host, SDHCI_OMAP_HCTL) & HCTL_SDBP)) { 2087d326930SKishon Vijay Abraham I if (WARN_ON(ktime_after(ktime_get(), timeout))) 2097d326930SKishon Vijay Abraham I return; 2107d326930SKishon Vijay Abraham I usleep_range(5, 10); 2117d326930SKishon Vijay Abraham I } 2127d326930SKishon Vijay Abraham I } 2137d326930SKishon Vijay Abraham I 2149fc2cd76SKishon Vijay Abraham I static inline void sdhci_omap_set_dll(struct sdhci_omap_host *omap_host, 2159fc2cd76SKishon Vijay Abraham I int count) 2169fc2cd76SKishon Vijay Abraham I { 2179fc2cd76SKishon Vijay Abraham I int i; 2189fc2cd76SKishon Vijay Abraham I u32 reg; 2199fc2cd76SKishon Vijay Abraham I 2209fc2cd76SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_DLL); 2219fc2cd76SKishon Vijay Abraham I reg |= DLL_FORCE_VALUE; 2229fc2cd76SKishon Vijay Abraham I reg &= ~DLL_FORCE_SR_C_MASK; 2239fc2cd76SKishon Vijay Abraham I reg |= (count << DLL_FORCE_SR_C_SHIFT); 2249fc2cd76SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_DLL, reg); 2259fc2cd76SKishon Vijay Abraham I 2269fc2cd76SKishon Vijay Abraham I reg |= DLL_CALIB; 2279fc2cd76SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_DLL, reg); 2289fc2cd76SKishon Vijay Abraham I for (i = 0; i < 1000; i++) { 2299fc2cd76SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_DLL); 2309fc2cd76SKishon Vijay Abraham I if (reg & DLL_CALIB) 2319fc2cd76SKishon Vijay Abraham I break; 2329fc2cd76SKishon Vijay Abraham I } 2339fc2cd76SKishon Vijay Abraham I reg &= ~DLL_CALIB; 2349fc2cd76SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_DLL, reg); 2359fc2cd76SKishon Vijay Abraham I } 2369fc2cd76SKishon Vijay Abraham I 2379fc2cd76SKishon Vijay Abraham I static void sdhci_omap_disable_tuning(struct sdhci_omap_host *omap_host) 2389fc2cd76SKishon Vijay Abraham I { 2399fc2cd76SKishon Vijay Abraham I u32 reg; 2409fc2cd76SKishon Vijay Abraham I 2419fc2cd76SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_AC12); 2429fc2cd76SKishon Vijay Abraham I reg &= ~AC12_SCLK_SEL; 2439fc2cd76SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_AC12, reg); 2449fc2cd76SKishon Vijay Abraham I 2459fc2cd76SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_DLL); 2469fc2cd76SKishon Vijay Abraham I reg &= ~(DLL_FORCE_VALUE | DLL_SWT); 2479fc2cd76SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_DLL, reg); 2489fc2cd76SKishon Vijay Abraham I } 2499fc2cd76SKishon Vijay Abraham I 2509fc2cd76SKishon Vijay Abraham I static int sdhci_omap_execute_tuning(struct mmc_host *mmc, u32 opcode) 2519fc2cd76SKishon Vijay Abraham I { 2529fc2cd76SKishon Vijay Abraham I struct sdhci_host *host = mmc_priv(mmc); 2539fc2cd76SKishon Vijay Abraham I struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 2549fc2cd76SKishon Vijay Abraham I struct sdhci_omap_host *omap_host = sdhci_pltfm_priv(pltfm_host); 2559fc2cd76SKishon Vijay Abraham I struct device *dev = omap_host->dev; 2569fc2cd76SKishon Vijay Abraham I struct mmc_ios *ios = &mmc->ios; 2579fc2cd76SKishon Vijay Abraham I u32 start_window = 0, max_window = 0; 2589fc2cd76SKishon Vijay Abraham I u8 cur_match, prev_match = 0; 2599fc2cd76SKishon Vijay Abraham I u32 length = 0, max_len = 0; 2607d33c358SKishon Vijay Abraham I u32 ier = host->ier; 2619fc2cd76SKishon Vijay Abraham I u32 phase_delay = 0; 2629fc2cd76SKishon Vijay Abraham I int ret = 0; 2639fc2cd76SKishon Vijay Abraham I u32 reg; 2649fc2cd76SKishon Vijay Abraham I 2659fc2cd76SKishon Vijay Abraham I pltfm_host = sdhci_priv(host); 2669fc2cd76SKishon Vijay Abraham I omap_host = sdhci_pltfm_priv(pltfm_host); 2679fc2cd76SKishon Vijay Abraham I dev = omap_host->dev; 2689fc2cd76SKishon Vijay Abraham I 2699fc2cd76SKishon Vijay Abraham I /* clock tuning is not needed for upto 52MHz */ 2709fc2cd76SKishon Vijay Abraham I if (ios->clock <= 52000000) 2719fc2cd76SKishon Vijay Abraham I return 0; 2729fc2cd76SKishon Vijay Abraham I 2739fc2cd76SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CAPA2); 2749fc2cd76SKishon Vijay Abraham I if (ios->timing == MMC_TIMING_UHS_SDR50 && !(reg & CAPA2_TSDR50)) 2759fc2cd76SKishon Vijay Abraham I return 0; 2769fc2cd76SKishon Vijay Abraham I 2779fc2cd76SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_DLL); 2789fc2cd76SKishon Vijay Abraham I reg |= DLL_SWT; 2799fc2cd76SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_DLL, reg); 2809fc2cd76SKishon Vijay Abraham I 2817d33c358SKishon Vijay Abraham I /* 2827d33c358SKishon Vijay Abraham I * OMAP5/DRA74X/DRA72x Errata i802: 2837d33c358SKishon Vijay Abraham I * DCRC error interrupts (MMCHS_STAT[21] DCRC=0x1) can occur 2847d33c358SKishon Vijay Abraham I * during the tuning procedure. So disable it during the 2857d33c358SKishon Vijay Abraham I * tuning procedure. 2867d33c358SKishon Vijay Abraham I */ 2877d33c358SKishon Vijay Abraham I ier &= ~SDHCI_INT_DATA_CRC; 2887d33c358SKishon Vijay Abraham I sdhci_writel(host, ier, SDHCI_INT_ENABLE); 2897d33c358SKishon Vijay Abraham I sdhci_writel(host, ier, SDHCI_SIGNAL_ENABLE); 2907d33c358SKishon Vijay Abraham I 2919fc2cd76SKishon Vijay Abraham I while (phase_delay <= MAX_PHASE_DELAY) { 2929fc2cd76SKishon Vijay Abraham I sdhci_omap_set_dll(omap_host, phase_delay); 2939fc2cd76SKishon Vijay Abraham I 2949fc2cd76SKishon Vijay Abraham I cur_match = !mmc_send_tuning(mmc, opcode, NULL); 2959fc2cd76SKishon Vijay Abraham I if (cur_match) { 2969fc2cd76SKishon Vijay Abraham I if (prev_match) { 2979fc2cd76SKishon Vijay Abraham I length++; 2989fc2cd76SKishon Vijay Abraham I } else { 2999fc2cd76SKishon Vijay Abraham I start_window = phase_delay; 3009fc2cd76SKishon Vijay Abraham I length = 1; 3019fc2cd76SKishon Vijay Abraham I } 3029fc2cd76SKishon Vijay Abraham I } 3039fc2cd76SKishon Vijay Abraham I 3049fc2cd76SKishon Vijay Abraham I if (length > max_len) { 3059fc2cd76SKishon Vijay Abraham I max_window = start_window; 3069fc2cd76SKishon Vijay Abraham I max_len = length; 3079fc2cd76SKishon Vijay Abraham I } 3089fc2cd76SKishon Vijay Abraham I 3099fc2cd76SKishon Vijay Abraham I prev_match = cur_match; 3109fc2cd76SKishon Vijay Abraham I phase_delay += 4; 3119fc2cd76SKishon Vijay Abraham I } 3129fc2cd76SKishon Vijay Abraham I 3139fc2cd76SKishon Vijay Abraham I if (!max_len) { 3149fc2cd76SKishon Vijay Abraham I dev_err(dev, "Unable to find match\n"); 3159fc2cd76SKishon Vijay Abraham I ret = -EIO; 3169fc2cd76SKishon Vijay Abraham I goto tuning_error; 3179fc2cd76SKishon Vijay Abraham I } 3189fc2cd76SKishon Vijay Abraham I 3199fc2cd76SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_AC12); 3209fc2cd76SKishon Vijay Abraham I if (!(reg & AC12_SCLK_SEL)) { 3219fc2cd76SKishon Vijay Abraham I ret = -EIO; 3229fc2cd76SKishon Vijay Abraham I goto tuning_error; 3239fc2cd76SKishon Vijay Abraham I } 3249fc2cd76SKishon Vijay Abraham I 3259fc2cd76SKishon Vijay Abraham I phase_delay = max_window + 4 * (max_len >> 1); 3269fc2cd76SKishon Vijay Abraham I sdhci_omap_set_dll(omap_host, phase_delay); 3279fc2cd76SKishon Vijay Abraham I 3289fc2cd76SKishon Vijay Abraham I goto ret; 3299fc2cd76SKishon Vijay Abraham I 3309fc2cd76SKishon Vijay Abraham I tuning_error: 3319fc2cd76SKishon Vijay Abraham I dev_err(dev, "Tuning failed\n"); 3329fc2cd76SKishon Vijay Abraham I sdhci_omap_disable_tuning(omap_host); 3339fc2cd76SKishon Vijay Abraham I 3349fc2cd76SKishon Vijay Abraham I ret: 3359fc2cd76SKishon Vijay Abraham I sdhci_reset(host, SDHCI_RESET_CMD | SDHCI_RESET_DATA); 3367d33c358SKishon Vijay Abraham I sdhci_writel(host, host->ier, SDHCI_INT_ENABLE); 3377d33c358SKishon Vijay Abraham I sdhci_writel(host, host->ier, SDHCI_SIGNAL_ENABLE); 3389fc2cd76SKishon Vijay Abraham I return ret; 3399fc2cd76SKishon Vijay Abraham I } 3409fc2cd76SKishon Vijay Abraham I 34120ea26a1SKishon Vijay Abraham I static int sdhci_omap_card_busy(struct mmc_host *mmc) 34220ea26a1SKishon Vijay Abraham I { 34320ea26a1SKishon Vijay Abraham I u32 reg, ac12; 34420ea26a1SKishon Vijay Abraham I int ret = false; 34520ea26a1SKishon Vijay Abraham I struct sdhci_host *host = mmc_priv(mmc); 34620ea26a1SKishon Vijay Abraham I struct sdhci_pltfm_host *pltfm_host; 34720ea26a1SKishon Vijay Abraham I struct sdhci_omap_host *omap_host; 34820ea26a1SKishon Vijay Abraham I u32 ier = host->ier; 34920ea26a1SKishon Vijay Abraham I 35020ea26a1SKishon Vijay Abraham I pltfm_host = sdhci_priv(host); 35120ea26a1SKishon Vijay Abraham I omap_host = sdhci_pltfm_priv(pltfm_host); 35220ea26a1SKishon Vijay Abraham I 35320ea26a1SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CON); 35420ea26a1SKishon Vijay Abraham I ac12 = sdhci_omap_readl(omap_host, SDHCI_OMAP_AC12); 35520ea26a1SKishon Vijay Abraham I reg &= ~CON_CLKEXTFREE; 35620ea26a1SKishon Vijay Abraham I if (ac12 & AC12_V1V8_SIGEN) 35720ea26a1SKishon Vijay Abraham I reg |= CON_CLKEXTFREE; 35820ea26a1SKishon Vijay Abraham I reg |= CON_PADEN; 35920ea26a1SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_CON, reg); 36020ea26a1SKishon Vijay Abraham I 36120ea26a1SKishon Vijay Abraham I disable_irq(host->irq); 36220ea26a1SKishon Vijay Abraham I ier |= SDHCI_INT_CARD_INT; 36320ea26a1SKishon Vijay Abraham I sdhci_writel(host, ier, SDHCI_INT_ENABLE); 36420ea26a1SKishon Vijay Abraham I sdhci_writel(host, ier, SDHCI_SIGNAL_ENABLE); 36520ea26a1SKishon Vijay Abraham I 36620ea26a1SKishon Vijay Abraham I /* 36720ea26a1SKishon Vijay Abraham I * Delay is required for PSTATE to correctly reflect 36820ea26a1SKishon Vijay Abraham I * DLEV/CLEV values after PADEN is set. 36920ea26a1SKishon Vijay Abraham I */ 37020ea26a1SKishon Vijay Abraham I usleep_range(50, 100); 37120ea26a1SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_PSTATE); 37220ea26a1SKishon Vijay Abraham I if ((reg & PSTATE_DATI) || !(reg & PSTATE_DLEV_DAT0)) 37320ea26a1SKishon Vijay Abraham I ret = true; 37420ea26a1SKishon Vijay Abraham I 37520ea26a1SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CON); 37620ea26a1SKishon Vijay Abraham I reg &= ~(CON_CLKEXTFREE | CON_PADEN); 37720ea26a1SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_CON, reg); 37820ea26a1SKishon Vijay Abraham I 37920ea26a1SKishon Vijay Abraham I sdhci_writel(host, host->ier, SDHCI_INT_ENABLE); 38020ea26a1SKishon Vijay Abraham I sdhci_writel(host, host->ier, SDHCI_SIGNAL_ENABLE); 38120ea26a1SKishon Vijay Abraham I enable_irq(host->irq); 38220ea26a1SKishon Vijay Abraham I 38320ea26a1SKishon Vijay Abraham I return ret; 38420ea26a1SKishon Vijay Abraham I } 38520ea26a1SKishon Vijay Abraham I 3867d326930SKishon Vijay Abraham I static int sdhci_omap_start_signal_voltage_switch(struct mmc_host *mmc, 3877d326930SKishon Vijay Abraham I struct mmc_ios *ios) 3887d326930SKishon Vijay Abraham I { 3897d326930SKishon Vijay Abraham I u32 reg; 3907d326930SKishon Vijay Abraham I int ret; 3917d326930SKishon Vijay Abraham I unsigned int iov; 3927d326930SKishon Vijay Abraham I struct sdhci_host *host = mmc_priv(mmc); 3937d326930SKishon Vijay Abraham I struct sdhci_pltfm_host *pltfm_host; 3947d326930SKishon Vijay Abraham I struct sdhci_omap_host *omap_host; 3957d326930SKishon Vijay Abraham I struct device *dev; 3967d326930SKishon Vijay Abraham I 3977d326930SKishon Vijay Abraham I pltfm_host = sdhci_priv(host); 3987d326930SKishon Vijay Abraham I omap_host = sdhci_pltfm_priv(pltfm_host); 3997d326930SKishon Vijay Abraham I dev = omap_host->dev; 4007d326930SKishon Vijay Abraham I 4017d326930SKishon Vijay Abraham I if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_330) { 4027d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CAPA); 4037d326930SKishon Vijay Abraham I if (!(reg & CAPA_VS33)) 4047d326930SKishon Vijay Abraham I return -EOPNOTSUPP; 4057d326930SKishon Vijay Abraham I 4067d326930SKishon Vijay Abraham I sdhci_omap_conf_bus_power(omap_host, ios->signal_voltage); 4077d326930SKishon Vijay Abraham I 4087d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_AC12); 4097d326930SKishon Vijay Abraham I reg &= ~AC12_V1V8_SIGEN; 4107d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_AC12, reg); 4117d326930SKishon Vijay Abraham I 4127d326930SKishon Vijay Abraham I iov = IOV_3V3; 4137d326930SKishon Vijay Abraham I } else if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_180) { 4147d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CAPA); 4157d326930SKishon Vijay Abraham I if (!(reg & CAPA_VS18)) 4167d326930SKishon Vijay Abraham I return -EOPNOTSUPP; 4177d326930SKishon Vijay Abraham I 4187d326930SKishon Vijay Abraham I sdhci_omap_conf_bus_power(omap_host, ios->signal_voltage); 4197d326930SKishon Vijay Abraham I 4207d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_AC12); 4217d326930SKishon Vijay Abraham I reg |= AC12_V1V8_SIGEN; 4227d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_AC12, reg); 4237d326930SKishon Vijay Abraham I 4247d326930SKishon Vijay Abraham I iov = IOV_1V8; 4257d326930SKishon Vijay Abraham I } else { 4267d326930SKishon Vijay Abraham I return -EOPNOTSUPP; 4277d326930SKishon Vijay Abraham I } 4287d326930SKishon Vijay Abraham I 4297d326930SKishon Vijay Abraham I ret = sdhci_omap_enable_iov(omap_host, iov); 4307d326930SKishon Vijay Abraham I if (ret) { 4317d326930SKishon Vijay Abraham I dev_err(dev, "failed to switch IO voltage to %dmV\n", iov); 4327d326930SKishon Vijay Abraham I return ret; 4337d326930SKishon Vijay Abraham I } 4347d326930SKishon Vijay Abraham I 4357d326930SKishon Vijay Abraham I dev_dbg(dev, "IO voltage switched to %dmV\n", iov); 4367d326930SKishon Vijay Abraham I return 0; 4377d326930SKishon Vijay Abraham I } 4387d326930SKishon Vijay Abraham I 439300df508SKishon Vijay Abraham I static void sdhci_omap_set_power_mode(struct sdhci_omap_host *omap_host, 440300df508SKishon Vijay Abraham I u8 power_mode) 441300df508SKishon Vijay Abraham I { 4429fc2cd76SKishon Vijay Abraham I if (omap_host->bus_mode == MMC_POWER_OFF) 4439fc2cd76SKishon Vijay Abraham I sdhci_omap_disable_tuning(omap_host); 444300df508SKishon Vijay Abraham I omap_host->power_mode = power_mode; 445300df508SKishon Vijay Abraham I } 446300df508SKishon Vijay Abraham I 4477d326930SKishon Vijay Abraham I static void sdhci_omap_set_bus_mode(struct sdhci_omap_host *omap_host, 4487d326930SKishon Vijay Abraham I unsigned int mode) 4497d326930SKishon Vijay Abraham I { 4507d326930SKishon Vijay Abraham I u32 reg; 4517d326930SKishon Vijay Abraham I 4527d326930SKishon Vijay Abraham I if (omap_host->bus_mode == mode) 4537d326930SKishon Vijay Abraham I return; 4547d326930SKishon Vijay Abraham I 4557d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CON); 4567d326930SKishon Vijay Abraham I if (mode == MMC_BUSMODE_OPENDRAIN) 4577d326930SKishon Vijay Abraham I reg |= CON_OD; 4587d326930SKishon Vijay Abraham I else 4597d326930SKishon Vijay Abraham I reg &= ~CON_OD; 4607d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_CON, reg); 4617d326930SKishon Vijay Abraham I 4627d326930SKishon Vijay Abraham I omap_host->bus_mode = mode; 4637d326930SKishon Vijay Abraham I } 4647d326930SKishon Vijay Abraham I 465ddde0e7dSColin Ian King static void sdhci_omap_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) 4667d326930SKishon Vijay Abraham I { 4677d326930SKishon Vijay Abraham I struct sdhci_host *host = mmc_priv(mmc); 4687d326930SKishon Vijay Abraham I struct sdhci_pltfm_host *pltfm_host; 4697d326930SKishon Vijay Abraham I struct sdhci_omap_host *omap_host; 4707d326930SKishon Vijay Abraham I 4717d326930SKishon Vijay Abraham I pltfm_host = sdhci_priv(host); 4727d326930SKishon Vijay Abraham I omap_host = sdhci_pltfm_priv(pltfm_host); 4737d326930SKishon Vijay Abraham I 4747d326930SKishon Vijay Abraham I sdhci_omap_set_bus_mode(omap_host, ios->bus_mode); 4757d326930SKishon Vijay Abraham I sdhci_set_ios(mmc, ios); 476300df508SKishon Vijay Abraham I sdhci_omap_set_power_mode(omap_host, ios->power_mode); 4777d326930SKishon Vijay Abraham I } 4787d326930SKishon Vijay Abraham I 4797d326930SKishon Vijay Abraham I static u16 sdhci_omap_calc_divisor(struct sdhci_pltfm_host *host, 4807d326930SKishon Vijay Abraham I unsigned int clock) 4817d326930SKishon Vijay Abraham I { 4827d326930SKishon Vijay Abraham I u16 dsor; 4837d326930SKishon Vijay Abraham I 4847d326930SKishon Vijay Abraham I dsor = DIV_ROUND_UP(clk_get_rate(host->clk), clock); 4857d326930SKishon Vijay Abraham I if (dsor > SYSCTL_CLKD_MAX) 4867d326930SKishon Vijay Abraham I dsor = SYSCTL_CLKD_MAX; 4877d326930SKishon Vijay Abraham I 4887d326930SKishon Vijay Abraham I return dsor; 4897d326930SKishon Vijay Abraham I } 4907d326930SKishon Vijay Abraham I 4917d326930SKishon Vijay Abraham I static void sdhci_omap_start_clock(struct sdhci_omap_host *omap_host) 4927d326930SKishon Vijay Abraham I { 4937d326930SKishon Vijay Abraham I u32 reg; 4947d326930SKishon Vijay Abraham I 4957d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_SYSCTL); 4967d326930SKishon Vijay Abraham I reg |= SYSCTL_CEN; 4977d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_SYSCTL, reg); 4987d326930SKishon Vijay Abraham I } 4997d326930SKishon Vijay Abraham I 5007d326930SKishon Vijay Abraham I static void sdhci_omap_stop_clock(struct sdhci_omap_host *omap_host) 5017d326930SKishon Vijay Abraham I { 5027d326930SKishon Vijay Abraham I u32 reg; 5037d326930SKishon Vijay Abraham I 5047d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_SYSCTL); 5057d326930SKishon Vijay Abraham I reg &= ~SYSCTL_CEN; 5067d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_SYSCTL, reg); 5077d326930SKishon Vijay Abraham I } 5087d326930SKishon Vijay Abraham I 5097d326930SKishon Vijay Abraham I static void sdhci_omap_set_clock(struct sdhci_host *host, unsigned int clock) 5107d326930SKishon Vijay Abraham I { 5117d326930SKishon Vijay Abraham I struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 5127d326930SKishon Vijay Abraham I struct sdhci_omap_host *omap_host = sdhci_pltfm_priv(pltfm_host); 5137d326930SKishon Vijay Abraham I unsigned long clkdiv; 5147d326930SKishon Vijay Abraham I 5157d326930SKishon Vijay Abraham I sdhci_omap_stop_clock(omap_host); 5167d326930SKishon Vijay Abraham I 5177d326930SKishon Vijay Abraham I if (!clock) 5187d326930SKishon Vijay Abraham I return; 5197d326930SKishon Vijay Abraham I 5207d326930SKishon Vijay Abraham I clkdiv = sdhci_omap_calc_divisor(pltfm_host, clock); 5217d326930SKishon Vijay Abraham I clkdiv = (clkdiv & SYSCTL_CLKD_MASK) << SYSCTL_CLKD_SHIFT; 5227d326930SKishon Vijay Abraham I sdhci_enable_clk(host, clkdiv); 5237d326930SKishon Vijay Abraham I 5247d326930SKishon Vijay Abraham I sdhci_omap_start_clock(omap_host); 5257d326930SKishon Vijay Abraham I } 5267d326930SKishon Vijay Abraham I 527ddde0e7dSColin Ian King static void sdhci_omap_set_power(struct sdhci_host *host, unsigned char mode, 5287d326930SKishon Vijay Abraham I unsigned short vdd) 5297d326930SKishon Vijay Abraham I { 5307d326930SKishon Vijay Abraham I struct mmc_host *mmc = host->mmc; 5317d326930SKishon Vijay Abraham I 5327d326930SKishon Vijay Abraham I mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, vdd); 5337d326930SKishon Vijay Abraham I } 5347d326930SKishon Vijay Abraham I 5357d326930SKishon Vijay Abraham I static int sdhci_omap_enable_dma(struct sdhci_host *host) 5367d326930SKishon Vijay Abraham I { 5377d326930SKishon Vijay Abraham I u32 reg; 5387d326930SKishon Vijay Abraham I struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 5397d326930SKishon Vijay Abraham I struct sdhci_omap_host *omap_host = sdhci_pltfm_priv(pltfm_host); 5407d326930SKishon Vijay Abraham I 5417d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CON); 5427d326930SKishon Vijay Abraham I reg |= CON_DMA_MASTER; 5437d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_CON, reg); 5447d326930SKishon Vijay Abraham I 5457d326930SKishon Vijay Abraham I return 0; 5467d326930SKishon Vijay Abraham I } 5477d326930SKishon Vijay Abraham I 548ddde0e7dSColin Ian King static unsigned int sdhci_omap_get_min_clock(struct sdhci_host *host) 5497d326930SKishon Vijay Abraham I { 5507d326930SKishon Vijay Abraham I struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 5517d326930SKishon Vijay Abraham I 5527d326930SKishon Vijay Abraham I return clk_get_rate(pltfm_host->clk) / SYSCTL_CLKD_MAX; 5537d326930SKishon Vijay Abraham I } 5547d326930SKishon Vijay Abraham I 5557d326930SKishon Vijay Abraham I static void sdhci_omap_set_bus_width(struct sdhci_host *host, int width) 5567d326930SKishon Vijay Abraham I { 5577d326930SKishon Vijay Abraham I struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 5587d326930SKishon Vijay Abraham I struct sdhci_omap_host *omap_host = sdhci_pltfm_priv(pltfm_host); 5597d326930SKishon Vijay Abraham I u32 reg; 5607d326930SKishon Vijay Abraham I 5617d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CON); 5627d326930SKishon Vijay Abraham I if (width == MMC_BUS_WIDTH_8) 5637d326930SKishon Vijay Abraham I reg |= CON_DW8; 5647d326930SKishon Vijay Abraham I else 5657d326930SKishon Vijay Abraham I reg &= ~CON_DW8; 5667d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_CON, reg); 5677d326930SKishon Vijay Abraham I 5687d326930SKishon Vijay Abraham I sdhci_set_bus_width(host, width); 5697d326930SKishon Vijay Abraham I } 5707d326930SKishon Vijay Abraham I 5717d326930SKishon Vijay Abraham I static void sdhci_omap_init_74_clocks(struct sdhci_host *host, u8 power_mode) 5727d326930SKishon Vijay Abraham I { 5737d326930SKishon Vijay Abraham I u32 reg; 5747d326930SKishon Vijay Abraham I ktime_t timeout; 5757d326930SKishon Vijay Abraham I struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 5767d326930SKishon Vijay Abraham I struct sdhci_omap_host *omap_host = sdhci_pltfm_priv(pltfm_host); 5777d326930SKishon Vijay Abraham I 5787d326930SKishon Vijay Abraham I if (omap_host->power_mode == power_mode) 5797d326930SKishon Vijay Abraham I return; 5807d326930SKishon Vijay Abraham I 5817d326930SKishon Vijay Abraham I if (power_mode != MMC_POWER_ON) 5827d326930SKishon Vijay Abraham I return; 5837d326930SKishon Vijay Abraham I 5847d326930SKishon Vijay Abraham I disable_irq(host->irq); 5857d326930SKishon Vijay Abraham I 5867d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CON); 5877d326930SKishon Vijay Abraham I reg |= CON_INIT; 5887d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_CON, reg); 5897d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_CMD, 0x0); 5907d326930SKishon Vijay Abraham I 5917d326930SKishon Vijay Abraham I /* wait 1ms */ 5927d326930SKishon Vijay Abraham I timeout = ktime_add_ms(ktime_get(), SDHCI_OMAP_TIMEOUT); 5937d326930SKishon Vijay Abraham I while (!(sdhci_omap_readl(omap_host, SDHCI_OMAP_STAT) & INT_CC_EN)) { 5947d326930SKishon Vijay Abraham I if (WARN_ON(ktime_after(ktime_get(), timeout))) 5957d326930SKishon Vijay Abraham I return; 5967d326930SKishon Vijay Abraham I usleep_range(5, 10); 5977d326930SKishon Vijay Abraham I } 5987d326930SKishon Vijay Abraham I 5997d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CON); 6007d326930SKishon Vijay Abraham I reg &= ~CON_INIT; 6017d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_CON, reg); 6027d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_STAT, INT_CC_EN); 6037d326930SKishon Vijay Abraham I 6047d326930SKishon Vijay Abraham I enable_irq(host->irq); 6057d326930SKishon Vijay Abraham I } 6067d326930SKishon Vijay Abraham I 60727ceb7e0SKishon Vijay Abraham I static void sdhci_omap_set_uhs_signaling(struct sdhci_host *host, 60827ceb7e0SKishon Vijay Abraham I unsigned int timing) 60927ceb7e0SKishon Vijay Abraham I { 61027ceb7e0SKishon Vijay Abraham I u32 reg; 61127ceb7e0SKishon Vijay Abraham I struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 61227ceb7e0SKishon Vijay Abraham I struct sdhci_omap_host *omap_host = sdhci_pltfm_priv(pltfm_host); 61327ceb7e0SKishon Vijay Abraham I 61427ceb7e0SKishon Vijay Abraham I sdhci_omap_stop_clock(omap_host); 61527ceb7e0SKishon Vijay Abraham I 61627ceb7e0SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CON); 61727ceb7e0SKishon Vijay Abraham I if (timing == MMC_TIMING_UHS_DDR50 || timing == MMC_TIMING_MMC_DDR52) 61827ceb7e0SKishon Vijay Abraham I reg |= CON_DDR; 61927ceb7e0SKishon Vijay Abraham I else 62027ceb7e0SKishon Vijay Abraham I reg &= ~CON_DDR; 62127ceb7e0SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_CON, reg); 62227ceb7e0SKishon Vijay Abraham I 62327ceb7e0SKishon Vijay Abraham I sdhci_set_uhs_signaling(host, timing); 62427ceb7e0SKishon Vijay Abraham I sdhci_omap_start_clock(omap_host); 62527ceb7e0SKishon Vijay Abraham I } 62627ceb7e0SKishon Vijay Abraham I 6277d326930SKishon Vijay Abraham I static struct sdhci_ops sdhci_omap_ops = { 6287d326930SKishon Vijay Abraham I .set_clock = sdhci_omap_set_clock, 6297d326930SKishon Vijay Abraham I .set_power = sdhci_omap_set_power, 6307d326930SKishon Vijay Abraham I .enable_dma = sdhci_omap_enable_dma, 6317d326930SKishon Vijay Abraham I .get_max_clock = sdhci_pltfm_clk_get_max_clock, 6327d326930SKishon Vijay Abraham I .get_min_clock = sdhci_omap_get_min_clock, 6337d326930SKishon Vijay Abraham I .set_bus_width = sdhci_omap_set_bus_width, 6347d326930SKishon Vijay Abraham I .platform_send_init_74_clocks = sdhci_omap_init_74_clocks, 6357d326930SKishon Vijay Abraham I .reset = sdhci_reset, 63627ceb7e0SKishon Vijay Abraham I .set_uhs_signaling = sdhci_omap_set_uhs_signaling, 6377d326930SKishon Vijay Abraham I }; 6387d326930SKishon Vijay Abraham I 6397d326930SKishon Vijay Abraham I static int sdhci_omap_set_capabilities(struct sdhci_omap_host *omap_host) 6407d326930SKishon Vijay Abraham I { 6417d326930SKishon Vijay Abraham I u32 reg; 6427d326930SKishon Vijay Abraham I int ret = 0; 6437d326930SKishon Vijay Abraham I struct device *dev = omap_host->dev; 6447d326930SKishon Vijay Abraham I struct regulator *vqmmc; 6457d326930SKishon Vijay Abraham I 6467d326930SKishon Vijay Abraham I vqmmc = regulator_get(dev, "vqmmc"); 6477d326930SKishon Vijay Abraham I if (IS_ERR(vqmmc)) { 6487d326930SKishon Vijay Abraham I ret = PTR_ERR(vqmmc); 6497d326930SKishon Vijay Abraham I goto reg_put; 6507d326930SKishon Vijay Abraham I } 6517d326930SKishon Vijay Abraham I 6527d326930SKishon Vijay Abraham I /* voltage capabilities might be set by boot loader, clear it */ 6537d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CAPA); 6547d326930SKishon Vijay Abraham I reg &= ~(CAPA_VS18 | CAPA_VS30 | CAPA_VS33); 6557d326930SKishon Vijay Abraham I 6567d326930SKishon Vijay Abraham I if (regulator_is_supported_voltage(vqmmc, IOV_3V3, IOV_3V3)) 6577d326930SKishon Vijay Abraham I reg |= CAPA_VS33; 6587d326930SKishon Vijay Abraham I if (regulator_is_supported_voltage(vqmmc, IOV_1V8, IOV_1V8)) 6597d326930SKishon Vijay Abraham I reg |= CAPA_VS18; 6607d326930SKishon Vijay Abraham I 6617d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_CAPA, reg); 6627d326930SKishon Vijay Abraham I 6637d326930SKishon Vijay Abraham I reg_put: 6647d326930SKishon Vijay Abraham I regulator_put(vqmmc); 6657d326930SKishon Vijay Abraham I 6667d326930SKishon Vijay Abraham I return ret; 6677d326930SKishon Vijay Abraham I } 6687d326930SKishon Vijay Abraham I 6697d326930SKishon Vijay Abraham I static const struct sdhci_pltfm_data sdhci_omap_pdata = { 6707d326930SKishon Vijay Abraham I .quirks = SDHCI_QUIRK_BROKEN_CARD_DETECTION | 6717d326930SKishon Vijay Abraham I SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK | 6727d326930SKishon Vijay Abraham I SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN | 6737d326930SKishon Vijay Abraham I SDHCI_QUIRK_NO_HISPD_BIT | 6747d326930SKishon Vijay Abraham I SDHCI_QUIRK_BROKEN_ADMA_ZEROLEN_DESC, 6757d326930SKishon Vijay Abraham I .quirks2 = SDHCI_QUIRK2_NO_1_8_V | 6767d326930SKishon Vijay Abraham I SDHCI_QUIRK2_ACMD23_BROKEN | 6777d326930SKishon Vijay Abraham I SDHCI_QUIRK2_RSP_136_HAS_CRC, 6787d326930SKishon Vijay Abraham I .ops = &sdhci_omap_ops, 6797d326930SKishon Vijay Abraham I }; 6807d326930SKishon Vijay Abraham I 6817d326930SKishon Vijay Abraham I static const struct sdhci_omap_data dra7_data = { 6827d326930SKishon Vijay Abraham I .offset = 0x200, 6837d326930SKishon Vijay Abraham I }; 6847d326930SKishon Vijay Abraham I 6857d326930SKishon Vijay Abraham I static const struct of_device_id omap_sdhci_match[] = { 6867d326930SKishon Vijay Abraham I { .compatible = "ti,dra7-sdhci", .data = &dra7_data }, 6877d326930SKishon Vijay Abraham I {}, 6887d326930SKishon Vijay Abraham I }; 6897d326930SKishon Vijay Abraham I MODULE_DEVICE_TABLE(of, omap_sdhci_match); 6907d326930SKishon Vijay Abraham I 6917d326930SKishon Vijay Abraham I static int sdhci_omap_probe(struct platform_device *pdev) 6927d326930SKishon Vijay Abraham I { 6937d326930SKishon Vijay Abraham I int ret; 6947d326930SKishon Vijay Abraham I u32 offset; 6957d326930SKishon Vijay Abraham I struct device *dev = &pdev->dev; 6967d326930SKishon Vijay Abraham I struct sdhci_host *host; 6977d326930SKishon Vijay Abraham I struct sdhci_pltfm_host *pltfm_host; 6987d326930SKishon Vijay Abraham I struct sdhci_omap_host *omap_host; 6997d326930SKishon Vijay Abraham I struct mmc_host *mmc; 7007d326930SKishon Vijay Abraham I const struct of_device_id *match; 7017d326930SKishon Vijay Abraham I struct sdhci_omap_data *data; 7027d326930SKishon Vijay Abraham I 7037d326930SKishon Vijay Abraham I match = of_match_device(omap_sdhci_match, dev); 7047d326930SKishon Vijay Abraham I if (!match) 7057d326930SKishon Vijay Abraham I return -EINVAL; 7067d326930SKishon Vijay Abraham I 7077d326930SKishon Vijay Abraham I data = (struct sdhci_omap_data *)match->data; 7087d326930SKishon Vijay Abraham I if (!data) { 7097d326930SKishon Vijay Abraham I dev_err(dev, "no sdhci omap data\n"); 7107d326930SKishon Vijay Abraham I return -EINVAL; 7117d326930SKishon Vijay Abraham I } 7127d326930SKishon Vijay Abraham I offset = data->offset; 7137d326930SKishon Vijay Abraham I 7147d326930SKishon Vijay Abraham I host = sdhci_pltfm_init(pdev, &sdhci_omap_pdata, 7157d326930SKishon Vijay Abraham I sizeof(*omap_host)); 7167d326930SKishon Vijay Abraham I if (IS_ERR(host)) { 7177d326930SKishon Vijay Abraham I dev_err(dev, "Failed sdhci_pltfm_init\n"); 7187d326930SKishon Vijay Abraham I return PTR_ERR(host); 7197d326930SKishon Vijay Abraham I } 7207d326930SKishon Vijay Abraham I 7217d326930SKishon Vijay Abraham I pltfm_host = sdhci_priv(host); 7227d326930SKishon Vijay Abraham I omap_host = sdhci_pltfm_priv(pltfm_host); 7237d326930SKishon Vijay Abraham I omap_host->host = host; 7247d326930SKishon Vijay Abraham I omap_host->base = host->ioaddr; 7257d326930SKishon Vijay Abraham I omap_host->dev = dev; 726300df508SKishon Vijay Abraham I omap_host->power_mode = MMC_POWER_UNDEFINED; 7277d326930SKishon Vijay Abraham I host->ioaddr += offset; 7287d326930SKishon Vijay Abraham I 7297d326930SKishon Vijay Abraham I mmc = host->mmc; 7307d326930SKishon Vijay Abraham I ret = mmc_of_parse(mmc); 7317d326930SKishon Vijay Abraham I if (ret) 7327d326930SKishon Vijay Abraham I goto err_pltfm_free; 7337d326930SKishon Vijay Abraham I 7347d326930SKishon Vijay Abraham I pltfm_host->clk = devm_clk_get(dev, "fck"); 7357d326930SKishon Vijay Abraham I if (IS_ERR(pltfm_host->clk)) { 7367d326930SKishon Vijay Abraham I ret = PTR_ERR(pltfm_host->clk); 7377d326930SKishon Vijay Abraham I goto err_pltfm_free; 7387d326930SKishon Vijay Abraham I } 7397d326930SKishon Vijay Abraham I 7407d326930SKishon Vijay Abraham I ret = clk_set_rate(pltfm_host->clk, mmc->f_max); 7417d326930SKishon Vijay Abraham I if (ret) { 7427d326930SKishon Vijay Abraham I dev_err(dev, "failed to set clock to %d\n", mmc->f_max); 7437d326930SKishon Vijay Abraham I goto err_pltfm_free; 7447d326930SKishon Vijay Abraham I } 7457d326930SKishon Vijay Abraham I 7467d326930SKishon Vijay Abraham I omap_host->pbias = devm_regulator_get_optional(dev, "pbias"); 7477d326930SKishon Vijay Abraham I if (IS_ERR(omap_host->pbias)) { 7487d326930SKishon Vijay Abraham I ret = PTR_ERR(omap_host->pbias); 7497d326930SKishon Vijay Abraham I if (ret != -ENODEV) 7507d326930SKishon Vijay Abraham I goto err_pltfm_free; 7517d326930SKishon Vijay Abraham I dev_dbg(dev, "unable to get pbias regulator %d\n", ret); 7527d326930SKishon Vijay Abraham I } 7537d326930SKishon Vijay Abraham I omap_host->pbias_enabled = false; 7547d326930SKishon Vijay Abraham I 7557d326930SKishon Vijay Abraham I /* 7567d326930SKishon Vijay Abraham I * omap_device_pm_domain has callbacks to enable the main 7577d326930SKishon Vijay Abraham I * functional clock, interface clock and also configure the 7587d326930SKishon Vijay Abraham I * SYSCONFIG register of omap devices. The callback will be invoked 7597d326930SKishon Vijay Abraham I * as part of pm_runtime_get_sync. 7607d326930SKishon Vijay Abraham I */ 7617d326930SKishon Vijay Abraham I pm_runtime_enable(dev); 7627d326930SKishon Vijay Abraham I ret = pm_runtime_get_sync(dev); 7637d326930SKishon Vijay Abraham I if (ret < 0) { 7647d326930SKishon Vijay Abraham I dev_err(dev, "pm_runtime_get_sync failed\n"); 7657d326930SKishon Vijay Abraham I pm_runtime_put_noidle(dev); 7667d326930SKishon Vijay Abraham I goto err_rpm_disable; 7677d326930SKishon Vijay Abraham I } 7687d326930SKishon Vijay Abraham I 7697d326930SKishon Vijay Abraham I ret = sdhci_omap_set_capabilities(omap_host); 7707d326930SKishon Vijay Abraham I if (ret) { 7717d326930SKishon Vijay Abraham I dev_err(dev, "failed to set system capabilities\n"); 7727d326930SKishon Vijay Abraham I goto err_put_sync; 7737d326930SKishon Vijay Abraham I } 7747d326930SKishon Vijay Abraham I 7757d326930SKishon Vijay Abraham I host->mmc_host_ops.get_ro = mmc_gpio_get_ro; 7767d326930SKishon Vijay Abraham I host->mmc_host_ops.start_signal_voltage_switch = 7777d326930SKishon Vijay Abraham I sdhci_omap_start_signal_voltage_switch; 7787d326930SKishon Vijay Abraham I host->mmc_host_ops.set_ios = sdhci_omap_set_ios; 77920ea26a1SKishon Vijay Abraham I host->mmc_host_ops.card_busy = sdhci_omap_card_busy; 7809fc2cd76SKishon Vijay Abraham I host->mmc_host_ops.execute_tuning = sdhci_omap_execute_tuning; 7817d326930SKishon Vijay Abraham I 7827d326930SKishon Vijay Abraham I sdhci_read_caps(host); 7837d326930SKishon Vijay Abraham I host->caps |= SDHCI_CAN_DO_ADMA2; 7847d326930SKishon Vijay Abraham I 7857d326930SKishon Vijay Abraham I ret = sdhci_add_host(host); 7867d326930SKishon Vijay Abraham I if (ret) 7877d326930SKishon Vijay Abraham I goto err_put_sync; 7887d326930SKishon Vijay Abraham I 7897d326930SKishon Vijay Abraham I return 0; 7907d326930SKishon Vijay Abraham I 7917d326930SKishon Vijay Abraham I err_put_sync: 7927d326930SKishon Vijay Abraham I pm_runtime_put_sync(dev); 7937d326930SKishon Vijay Abraham I 7947d326930SKishon Vijay Abraham I err_rpm_disable: 7957d326930SKishon Vijay Abraham I pm_runtime_disable(dev); 7967d326930SKishon Vijay Abraham I 7977d326930SKishon Vijay Abraham I err_pltfm_free: 7987d326930SKishon Vijay Abraham I sdhci_pltfm_free(pdev); 7997d326930SKishon Vijay Abraham I return ret; 8007d326930SKishon Vijay Abraham I } 8017d326930SKishon Vijay Abraham I 8027d326930SKishon Vijay Abraham I static int sdhci_omap_remove(struct platform_device *pdev) 8037d326930SKishon Vijay Abraham I { 8047d326930SKishon Vijay Abraham I struct device *dev = &pdev->dev; 8057d326930SKishon Vijay Abraham I struct sdhci_host *host = platform_get_drvdata(pdev); 8067d326930SKishon Vijay Abraham I 8077d326930SKishon Vijay Abraham I sdhci_remove_host(host, true); 8087d326930SKishon Vijay Abraham I pm_runtime_put_sync(dev); 8097d326930SKishon Vijay Abraham I pm_runtime_disable(dev); 8107d326930SKishon Vijay Abraham I sdhci_pltfm_free(pdev); 8117d326930SKishon Vijay Abraham I 8127d326930SKishon Vijay Abraham I return 0; 8137d326930SKishon Vijay Abraham I } 8147d326930SKishon Vijay Abraham I 8157d326930SKishon Vijay Abraham I static struct platform_driver sdhci_omap_driver = { 8167d326930SKishon Vijay Abraham I .probe = sdhci_omap_probe, 8177d326930SKishon Vijay Abraham I .remove = sdhci_omap_remove, 8187d326930SKishon Vijay Abraham I .driver = { 8197d326930SKishon Vijay Abraham I .name = "sdhci-omap", 8207d326930SKishon Vijay Abraham I .of_match_table = omap_sdhci_match, 8217d326930SKishon Vijay Abraham I }, 8227d326930SKishon Vijay Abraham I }; 8237d326930SKishon Vijay Abraham I 8247d326930SKishon Vijay Abraham I module_platform_driver(sdhci_omap_driver); 8257d326930SKishon Vijay Abraham I 8267d326930SKishon Vijay Abraham I MODULE_DESCRIPTION("SDHCI driver for OMAP SoCs"); 8277d326930SKishon Vijay Abraham I MODULE_AUTHOR("Texas Instruments Inc."); 8287d326930SKishon Vijay Abraham I MODULE_LICENSE("GPL v2"); 8297d326930SKishon Vijay Abraham I MODULE_ALIAS("platform:sdhci_omap"); 830