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) 39efde12b2SKishon Vijay Abraham I #define CON_CTPL BIT(11) 407d326930SKishon Vijay Abraham I #define CON_INIT BIT(1) 417d326930SKishon Vijay Abraham I #define CON_OD BIT(0) 427d326930SKishon Vijay Abraham I 439fc2cd76SKishon Vijay Abraham I #define SDHCI_OMAP_DLL 0x0134 449fc2cd76SKishon Vijay Abraham I #define DLL_SWT BIT(20) 459fc2cd76SKishon Vijay Abraham I #define DLL_FORCE_SR_C_SHIFT 13 469fc2cd76SKishon Vijay Abraham I #define DLL_FORCE_SR_C_MASK (0x7f << DLL_FORCE_SR_C_SHIFT) 479fc2cd76SKishon Vijay Abraham I #define DLL_FORCE_VALUE BIT(12) 489fc2cd76SKishon Vijay Abraham I #define DLL_CALIB BIT(1) 499fc2cd76SKishon Vijay Abraham I 507d326930SKishon Vijay Abraham I #define SDHCI_OMAP_CMD 0x20c 517d326930SKishon Vijay Abraham I 5220ea26a1SKishon Vijay Abraham I #define SDHCI_OMAP_PSTATE 0x0224 5320ea26a1SKishon Vijay Abraham I #define PSTATE_DLEV_DAT0 BIT(20) 5420ea26a1SKishon Vijay Abraham I #define PSTATE_DATI BIT(1) 5520ea26a1SKishon Vijay Abraham I 567d326930SKishon Vijay Abraham I #define SDHCI_OMAP_HCTL 0x228 577d326930SKishon Vijay Abraham I #define HCTL_SDBP BIT(8) 587d326930SKishon Vijay Abraham I #define HCTL_SDVS_SHIFT 9 597d326930SKishon Vijay Abraham I #define HCTL_SDVS_MASK (0x7 << HCTL_SDVS_SHIFT) 607d326930SKishon Vijay Abraham I #define HCTL_SDVS_33 (0x7 << HCTL_SDVS_SHIFT) 617d326930SKishon Vijay Abraham I #define HCTL_SDVS_30 (0x6 << HCTL_SDVS_SHIFT) 627d326930SKishon Vijay Abraham I #define HCTL_SDVS_18 (0x5 << HCTL_SDVS_SHIFT) 637d326930SKishon Vijay Abraham I 647d326930SKishon Vijay Abraham I #define SDHCI_OMAP_SYSCTL 0x22c 657d326930SKishon Vijay Abraham I #define SYSCTL_CEN BIT(2) 667d326930SKishon Vijay Abraham I #define SYSCTL_CLKD_SHIFT 6 677d326930SKishon Vijay Abraham I #define SYSCTL_CLKD_MASK 0x3ff 687d326930SKishon Vijay Abraham I 697d326930SKishon Vijay Abraham I #define SDHCI_OMAP_STAT 0x230 707d326930SKishon Vijay Abraham I 717d326930SKishon Vijay Abraham I #define SDHCI_OMAP_IE 0x234 727d326930SKishon Vijay Abraham I #define INT_CC_EN BIT(0) 737d326930SKishon Vijay Abraham I 747d326930SKishon Vijay Abraham I #define SDHCI_OMAP_AC12 0x23c 757d326930SKishon Vijay Abraham I #define AC12_V1V8_SIGEN BIT(19) 769fc2cd76SKishon Vijay Abraham I #define AC12_SCLK_SEL BIT(23) 777d326930SKishon Vijay Abraham I 787d326930SKishon Vijay Abraham I #define SDHCI_OMAP_CAPA 0x240 797d326930SKishon Vijay Abraham I #define CAPA_VS33 BIT(24) 807d326930SKishon Vijay Abraham I #define CAPA_VS30 BIT(25) 817d326930SKishon Vijay Abraham I #define CAPA_VS18 BIT(26) 827d326930SKishon Vijay Abraham I 839fc2cd76SKishon Vijay Abraham I #define SDHCI_OMAP_CAPA2 0x0244 849fc2cd76SKishon Vijay Abraham I #define CAPA2_TSDR50 BIT(13) 859fc2cd76SKishon Vijay Abraham I 867d326930SKishon Vijay Abraham I #define SDHCI_OMAP_TIMEOUT 1 /* 1 msec */ 877d326930SKishon Vijay Abraham I 887d326930SKishon Vijay Abraham I #define SYSCTL_CLKD_MAX 0x3FF 897d326930SKishon Vijay Abraham I 907d326930SKishon Vijay Abraham I #define IOV_1V8 1800000 /* 180000 uV */ 917d326930SKishon Vijay Abraham I #define IOV_3V0 3000000 /* 300000 uV */ 927d326930SKishon Vijay Abraham I #define IOV_3V3 3300000 /* 330000 uV */ 937d326930SKishon Vijay Abraham I 949fc2cd76SKishon Vijay Abraham I #define MAX_PHASE_DELAY 0x7C 959fc2cd76SKishon Vijay Abraham I 968d20b2eaSKishon Vijay Abraham I /* sdhci-omap controller flags */ 978d20b2eaSKishon Vijay Abraham I #define SDHCI_OMAP_REQUIRE_IODELAY BIT(0) 988d20b2eaSKishon Vijay Abraham I 997d326930SKishon Vijay Abraham I struct sdhci_omap_data { 1007d326930SKishon Vijay Abraham I u32 offset; 1018d20b2eaSKishon Vijay Abraham I u8 flags; 1027d326930SKishon Vijay Abraham I }; 1037d326930SKishon Vijay Abraham I 1047d326930SKishon Vijay Abraham I struct sdhci_omap_host { 105212f4f8aSKishon Vijay Abraham I char *version; 1067d326930SKishon Vijay Abraham I void __iomem *base; 1077d326930SKishon Vijay Abraham I struct device *dev; 1087d326930SKishon Vijay Abraham I struct regulator *pbias; 1097d326930SKishon Vijay Abraham I bool pbias_enabled; 1107d326930SKishon Vijay Abraham I struct sdhci_host *host; 1117d326930SKishon Vijay Abraham I u8 bus_mode; 1127d326930SKishon Vijay Abraham I u8 power_mode; 1138d20b2eaSKishon Vijay Abraham I u8 timing; 1148d20b2eaSKishon Vijay Abraham I u8 flags; 1158d20b2eaSKishon Vijay Abraham I 1168d20b2eaSKishon Vijay Abraham I struct pinctrl *pinctrl; 1178d20b2eaSKishon Vijay Abraham I struct pinctrl_state **pinctrl_state; 1187d326930SKishon Vijay Abraham I }; 1197d326930SKishon Vijay Abraham I 1208d20b2eaSKishon Vijay Abraham I static void sdhci_omap_start_clock(struct sdhci_omap_host *omap_host); 1218d20b2eaSKishon Vijay Abraham I static void sdhci_omap_stop_clock(struct sdhci_omap_host *omap_host); 1228d20b2eaSKishon Vijay Abraham I 1237d326930SKishon Vijay Abraham I static inline u32 sdhci_omap_readl(struct sdhci_omap_host *host, 1247d326930SKishon Vijay Abraham I unsigned int offset) 1257d326930SKishon Vijay Abraham I { 1267d326930SKishon Vijay Abraham I return readl(host->base + offset); 1277d326930SKishon Vijay Abraham I } 1287d326930SKishon Vijay Abraham I 1297d326930SKishon Vijay Abraham I static inline void sdhci_omap_writel(struct sdhci_omap_host *host, 1307d326930SKishon Vijay Abraham I unsigned int offset, u32 data) 1317d326930SKishon Vijay Abraham I { 1327d326930SKishon Vijay Abraham I writel(data, host->base + offset); 1337d326930SKishon Vijay Abraham I } 1347d326930SKishon Vijay Abraham I 1357d326930SKishon Vijay Abraham I static int sdhci_omap_set_pbias(struct sdhci_omap_host *omap_host, 1367d326930SKishon Vijay Abraham I bool power_on, unsigned int iov) 1377d326930SKishon Vijay Abraham I { 1387d326930SKishon Vijay Abraham I int ret; 1397d326930SKishon Vijay Abraham I struct device *dev = omap_host->dev; 1407d326930SKishon Vijay Abraham I 1417d326930SKishon Vijay Abraham I if (IS_ERR(omap_host->pbias)) 1427d326930SKishon Vijay Abraham I return 0; 1437d326930SKishon Vijay Abraham I 1447d326930SKishon Vijay Abraham I if (power_on) { 1457d326930SKishon Vijay Abraham I ret = regulator_set_voltage(omap_host->pbias, iov, iov); 1467d326930SKishon Vijay Abraham I if (ret) { 1477d326930SKishon Vijay Abraham I dev_err(dev, "pbias set voltage failed\n"); 1487d326930SKishon Vijay Abraham I return ret; 1497d326930SKishon Vijay Abraham I } 1507d326930SKishon Vijay Abraham I 1517d326930SKishon Vijay Abraham I if (omap_host->pbias_enabled) 1527d326930SKishon Vijay Abraham I return 0; 1537d326930SKishon Vijay Abraham I 1547d326930SKishon Vijay Abraham I ret = regulator_enable(omap_host->pbias); 1557d326930SKishon Vijay Abraham I if (ret) { 1567d326930SKishon Vijay Abraham I dev_err(dev, "pbias reg enable fail\n"); 1577d326930SKishon Vijay Abraham I return ret; 1587d326930SKishon Vijay Abraham I } 1597d326930SKishon Vijay Abraham I 1607d326930SKishon Vijay Abraham I omap_host->pbias_enabled = true; 1617d326930SKishon Vijay Abraham I } else { 1627d326930SKishon Vijay Abraham I if (!omap_host->pbias_enabled) 1637d326930SKishon Vijay Abraham I return 0; 1647d326930SKishon Vijay Abraham I 1657d326930SKishon Vijay Abraham I ret = regulator_disable(omap_host->pbias); 1667d326930SKishon Vijay Abraham I if (ret) { 1677d326930SKishon Vijay Abraham I dev_err(dev, "pbias reg disable fail\n"); 1687d326930SKishon Vijay Abraham I return ret; 1697d326930SKishon Vijay Abraham I } 1707d326930SKishon Vijay Abraham I omap_host->pbias_enabled = false; 1717d326930SKishon Vijay Abraham I } 1727d326930SKishon Vijay Abraham I 1737d326930SKishon Vijay Abraham I return 0; 1747d326930SKishon Vijay Abraham I } 1757d326930SKishon Vijay Abraham I 1767d326930SKishon Vijay Abraham I static int sdhci_omap_enable_iov(struct sdhci_omap_host *omap_host, 1777d326930SKishon Vijay Abraham I unsigned int iov) 1787d326930SKishon Vijay Abraham I { 1797d326930SKishon Vijay Abraham I int ret; 1807d326930SKishon Vijay Abraham I struct sdhci_host *host = omap_host->host; 1817d326930SKishon Vijay Abraham I struct mmc_host *mmc = host->mmc; 1827d326930SKishon Vijay Abraham I 1837d326930SKishon Vijay Abraham I ret = sdhci_omap_set_pbias(omap_host, false, 0); 1847d326930SKishon Vijay Abraham I if (ret) 1857d326930SKishon Vijay Abraham I return ret; 1867d326930SKishon Vijay Abraham I 1877d326930SKishon Vijay Abraham I if (!IS_ERR(mmc->supply.vqmmc)) { 1887d326930SKishon Vijay Abraham I ret = regulator_set_voltage(mmc->supply.vqmmc, iov, iov); 1897d326930SKishon Vijay Abraham I if (ret) { 1907d326930SKishon Vijay Abraham I dev_err(mmc_dev(mmc), "vqmmc set voltage failed\n"); 1917d326930SKishon Vijay Abraham I return ret; 1927d326930SKishon Vijay Abraham I } 1937d326930SKishon Vijay Abraham I } 1947d326930SKishon Vijay Abraham I 1957d326930SKishon Vijay Abraham I ret = sdhci_omap_set_pbias(omap_host, true, iov); 1967d326930SKishon Vijay Abraham I if (ret) 1977d326930SKishon Vijay Abraham I return ret; 1987d326930SKishon Vijay Abraham I 1997d326930SKishon Vijay Abraham I return 0; 2007d326930SKishon Vijay Abraham I } 2017d326930SKishon Vijay Abraham I 2027d326930SKishon Vijay Abraham I static void sdhci_omap_conf_bus_power(struct sdhci_omap_host *omap_host, 2037d326930SKishon Vijay Abraham I unsigned char signal_voltage) 2047d326930SKishon Vijay Abraham I { 2057d326930SKishon Vijay Abraham I u32 reg; 2067d326930SKishon Vijay Abraham I ktime_t timeout; 2077d326930SKishon Vijay Abraham I 2087d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_HCTL); 2097d326930SKishon Vijay Abraham I reg &= ~HCTL_SDVS_MASK; 2107d326930SKishon Vijay Abraham I 2117d326930SKishon Vijay Abraham I if (signal_voltage == MMC_SIGNAL_VOLTAGE_330) 2127d326930SKishon Vijay Abraham I reg |= HCTL_SDVS_33; 2137d326930SKishon Vijay Abraham I else 2147d326930SKishon Vijay Abraham I reg |= HCTL_SDVS_18; 2157d326930SKishon Vijay Abraham I 2167d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_HCTL, reg); 2177d326930SKishon Vijay Abraham I 2187d326930SKishon Vijay Abraham I reg |= HCTL_SDBP; 2197d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_HCTL, reg); 2207d326930SKishon Vijay Abraham I 2217d326930SKishon Vijay Abraham I /* wait 1ms */ 2227d326930SKishon Vijay Abraham I timeout = ktime_add_ms(ktime_get(), SDHCI_OMAP_TIMEOUT); 2237d326930SKishon Vijay Abraham I while (!(sdhci_omap_readl(omap_host, SDHCI_OMAP_HCTL) & HCTL_SDBP)) { 2247d326930SKishon Vijay Abraham I if (WARN_ON(ktime_after(ktime_get(), timeout))) 2257d326930SKishon Vijay Abraham I return; 2267d326930SKishon Vijay Abraham I usleep_range(5, 10); 2277d326930SKishon Vijay Abraham I } 2287d326930SKishon Vijay Abraham I } 2297d326930SKishon Vijay Abraham I 230efde12b2SKishon Vijay Abraham I static void sdhci_omap_enable_sdio_irq(struct mmc_host *mmc, int enable) 231efde12b2SKishon Vijay Abraham I { 232efde12b2SKishon Vijay Abraham I struct sdhci_host *host = mmc_priv(mmc); 233efde12b2SKishon Vijay Abraham I struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 234efde12b2SKishon Vijay Abraham I struct sdhci_omap_host *omap_host = sdhci_pltfm_priv(pltfm_host); 235efde12b2SKishon Vijay Abraham I u32 reg; 236efde12b2SKishon Vijay Abraham I 237efde12b2SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CON); 238efde12b2SKishon Vijay Abraham I if (enable) 239efde12b2SKishon Vijay Abraham I reg |= (CON_CTPL | CON_CLKEXTFREE); 240efde12b2SKishon Vijay Abraham I else 241efde12b2SKishon Vijay Abraham I reg &= ~(CON_CTPL | CON_CLKEXTFREE); 242efde12b2SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_CON, reg); 243efde12b2SKishon Vijay Abraham I 244efde12b2SKishon Vijay Abraham I sdhci_enable_sdio_irq(mmc, enable); 245efde12b2SKishon Vijay Abraham I } 246efde12b2SKishon Vijay Abraham I 2479fc2cd76SKishon Vijay Abraham I static inline void sdhci_omap_set_dll(struct sdhci_omap_host *omap_host, 2489fc2cd76SKishon Vijay Abraham I int count) 2499fc2cd76SKishon Vijay Abraham I { 2509fc2cd76SKishon Vijay Abraham I int i; 2519fc2cd76SKishon Vijay Abraham I u32 reg; 2529fc2cd76SKishon Vijay Abraham I 2539fc2cd76SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_DLL); 2549fc2cd76SKishon Vijay Abraham I reg |= DLL_FORCE_VALUE; 2559fc2cd76SKishon Vijay Abraham I reg &= ~DLL_FORCE_SR_C_MASK; 2569fc2cd76SKishon Vijay Abraham I reg |= (count << DLL_FORCE_SR_C_SHIFT); 2579fc2cd76SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_DLL, reg); 2589fc2cd76SKishon Vijay Abraham I 2599fc2cd76SKishon Vijay Abraham I reg |= DLL_CALIB; 2609fc2cd76SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_DLL, reg); 2619fc2cd76SKishon Vijay Abraham I for (i = 0; i < 1000; i++) { 2629fc2cd76SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_DLL); 2639fc2cd76SKishon Vijay Abraham I if (reg & DLL_CALIB) 2649fc2cd76SKishon Vijay Abraham I break; 2659fc2cd76SKishon Vijay Abraham I } 2669fc2cd76SKishon Vijay Abraham I reg &= ~DLL_CALIB; 2679fc2cd76SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_DLL, reg); 2689fc2cd76SKishon Vijay Abraham I } 2699fc2cd76SKishon Vijay Abraham I 2709fc2cd76SKishon Vijay Abraham I static void sdhci_omap_disable_tuning(struct sdhci_omap_host *omap_host) 2719fc2cd76SKishon Vijay Abraham I { 2729fc2cd76SKishon Vijay Abraham I u32 reg; 2739fc2cd76SKishon Vijay Abraham I 2749fc2cd76SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_AC12); 2759fc2cd76SKishon Vijay Abraham I reg &= ~AC12_SCLK_SEL; 2769fc2cd76SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_AC12, reg); 2779fc2cd76SKishon Vijay Abraham I 2789fc2cd76SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_DLL); 2799fc2cd76SKishon Vijay Abraham I reg &= ~(DLL_FORCE_VALUE | DLL_SWT); 2809fc2cd76SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_DLL, reg); 2819fc2cd76SKishon Vijay Abraham I } 2829fc2cd76SKishon Vijay Abraham I 2839fc2cd76SKishon Vijay Abraham I static int sdhci_omap_execute_tuning(struct mmc_host *mmc, u32 opcode) 2849fc2cd76SKishon Vijay Abraham I { 2859fc2cd76SKishon Vijay Abraham I struct sdhci_host *host = mmc_priv(mmc); 2869fc2cd76SKishon Vijay Abraham I struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 2879fc2cd76SKishon Vijay Abraham I struct sdhci_omap_host *omap_host = sdhci_pltfm_priv(pltfm_host); 2889fc2cd76SKishon Vijay Abraham I struct device *dev = omap_host->dev; 2899fc2cd76SKishon Vijay Abraham I struct mmc_ios *ios = &mmc->ios; 2909fc2cd76SKishon Vijay Abraham I u32 start_window = 0, max_window = 0; 2919fc2cd76SKishon Vijay Abraham I u8 cur_match, prev_match = 0; 2929fc2cd76SKishon Vijay Abraham I u32 length = 0, max_len = 0; 2937d33c358SKishon Vijay Abraham I u32 ier = host->ier; 2949fc2cd76SKishon Vijay Abraham I u32 phase_delay = 0; 2959fc2cd76SKishon Vijay Abraham I int ret = 0; 2969fc2cd76SKishon Vijay Abraham I u32 reg; 2979fc2cd76SKishon Vijay Abraham I 2989fc2cd76SKishon Vijay Abraham I pltfm_host = sdhci_priv(host); 2999fc2cd76SKishon Vijay Abraham I omap_host = sdhci_pltfm_priv(pltfm_host); 3009fc2cd76SKishon Vijay Abraham I dev = omap_host->dev; 3019fc2cd76SKishon Vijay Abraham I 3029fc2cd76SKishon Vijay Abraham I /* clock tuning is not needed for upto 52MHz */ 3039fc2cd76SKishon Vijay Abraham I if (ios->clock <= 52000000) 3049fc2cd76SKishon Vijay Abraham I return 0; 3059fc2cd76SKishon Vijay Abraham I 3069fc2cd76SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CAPA2); 3079fc2cd76SKishon Vijay Abraham I if (ios->timing == MMC_TIMING_UHS_SDR50 && !(reg & CAPA2_TSDR50)) 3089fc2cd76SKishon Vijay Abraham I return 0; 3099fc2cd76SKishon Vijay Abraham I 3109fc2cd76SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_DLL); 3119fc2cd76SKishon Vijay Abraham I reg |= DLL_SWT; 3129fc2cd76SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_DLL, reg); 3139fc2cd76SKishon Vijay Abraham I 3147d33c358SKishon Vijay Abraham I /* 3157d33c358SKishon Vijay Abraham I * OMAP5/DRA74X/DRA72x Errata i802: 3167d33c358SKishon Vijay Abraham I * DCRC error interrupts (MMCHS_STAT[21] DCRC=0x1) can occur 3177d33c358SKishon Vijay Abraham I * during the tuning procedure. So disable it during the 3187d33c358SKishon Vijay Abraham I * tuning procedure. 3197d33c358SKishon Vijay Abraham I */ 3207d33c358SKishon Vijay Abraham I ier &= ~SDHCI_INT_DATA_CRC; 3217d33c358SKishon Vijay Abraham I sdhci_writel(host, ier, SDHCI_INT_ENABLE); 3227d33c358SKishon Vijay Abraham I sdhci_writel(host, ier, SDHCI_SIGNAL_ENABLE); 3237d33c358SKishon Vijay Abraham I 3249fc2cd76SKishon Vijay Abraham I while (phase_delay <= MAX_PHASE_DELAY) { 3259fc2cd76SKishon Vijay Abraham I sdhci_omap_set_dll(omap_host, phase_delay); 3269fc2cd76SKishon Vijay Abraham I 3279fc2cd76SKishon Vijay Abraham I cur_match = !mmc_send_tuning(mmc, opcode, NULL); 3289fc2cd76SKishon Vijay Abraham I if (cur_match) { 3299fc2cd76SKishon Vijay Abraham I if (prev_match) { 3309fc2cd76SKishon Vijay Abraham I length++; 3319fc2cd76SKishon Vijay Abraham I } else { 3329fc2cd76SKishon Vijay Abraham I start_window = phase_delay; 3339fc2cd76SKishon Vijay Abraham I length = 1; 3349fc2cd76SKishon Vijay Abraham I } 3359fc2cd76SKishon Vijay Abraham I } 3369fc2cd76SKishon Vijay Abraham I 3379fc2cd76SKishon Vijay Abraham I if (length > max_len) { 3389fc2cd76SKishon Vijay Abraham I max_window = start_window; 3399fc2cd76SKishon Vijay Abraham I max_len = length; 3409fc2cd76SKishon Vijay Abraham I } 3419fc2cd76SKishon Vijay Abraham I 3429fc2cd76SKishon Vijay Abraham I prev_match = cur_match; 3439fc2cd76SKishon Vijay Abraham I phase_delay += 4; 3449fc2cd76SKishon Vijay Abraham I } 3459fc2cd76SKishon Vijay Abraham I 3469fc2cd76SKishon Vijay Abraham I if (!max_len) { 3479fc2cd76SKishon Vijay Abraham I dev_err(dev, "Unable to find match\n"); 3489fc2cd76SKishon Vijay Abraham I ret = -EIO; 3499fc2cd76SKishon Vijay Abraham I goto tuning_error; 3509fc2cd76SKishon Vijay Abraham I } 3519fc2cd76SKishon Vijay Abraham I 3529fc2cd76SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_AC12); 3539fc2cd76SKishon Vijay Abraham I if (!(reg & AC12_SCLK_SEL)) { 3549fc2cd76SKishon Vijay Abraham I ret = -EIO; 3559fc2cd76SKishon Vijay Abraham I goto tuning_error; 3569fc2cd76SKishon Vijay Abraham I } 3579fc2cd76SKishon Vijay Abraham I 3589fc2cd76SKishon Vijay Abraham I phase_delay = max_window + 4 * (max_len >> 1); 3599fc2cd76SKishon Vijay Abraham I sdhci_omap_set_dll(omap_host, phase_delay); 3609fc2cd76SKishon Vijay Abraham I 3619fc2cd76SKishon Vijay Abraham I goto ret; 3629fc2cd76SKishon Vijay Abraham I 3639fc2cd76SKishon Vijay Abraham I tuning_error: 3649fc2cd76SKishon Vijay Abraham I dev_err(dev, "Tuning failed\n"); 3659fc2cd76SKishon Vijay Abraham I sdhci_omap_disable_tuning(omap_host); 3669fc2cd76SKishon Vijay Abraham I 3679fc2cd76SKishon Vijay Abraham I ret: 3689fc2cd76SKishon Vijay Abraham I sdhci_reset(host, SDHCI_RESET_CMD | SDHCI_RESET_DATA); 3697d33c358SKishon Vijay Abraham I sdhci_writel(host, host->ier, SDHCI_INT_ENABLE); 3707d33c358SKishon Vijay Abraham I sdhci_writel(host, host->ier, SDHCI_SIGNAL_ENABLE); 3719fc2cd76SKishon Vijay Abraham I return ret; 3729fc2cd76SKishon Vijay Abraham I } 3739fc2cd76SKishon Vijay Abraham I 37420ea26a1SKishon Vijay Abraham I static int sdhci_omap_card_busy(struct mmc_host *mmc) 37520ea26a1SKishon Vijay Abraham I { 37620ea26a1SKishon Vijay Abraham I u32 reg, ac12; 37720ea26a1SKishon Vijay Abraham I int ret = false; 37820ea26a1SKishon Vijay Abraham I struct sdhci_host *host = mmc_priv(mmc); 37920ea26a1SKishon Vijay Abraham I struct sdhci_pltfm_host *pltfm_host; 38020ea26a1SKishon Vijay Abraham I struct sdhci_omap_host *omap_host; 38120ea26a1SKishon Vijay Abraham I u32 ier = host->ier; 38220ea26a1SKishon Vijay Abraham I 38320ea26a1SKishon Vijay Abraham I pltfm_host = sdhci_priv(host); 38420ea26a1SKishon Vijay Abraham I omap_host = sdhci_pltfm_priv(pltfm_host); 38520ea26a1SKishon Vijay Abraham I 38620ea26a1SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CON); 38720ea26a1SKishon Vijay Abraham I ac12 = sdhci_omap_readl(omap_host, SDHCI_OMAP_AC12); 38820ea26a1SKishon Vijay Abraham I reg &= ~CON_CLKEXTFREE; 38920ea26a1SKishon Vijay Abraham I if (ac12 & AC12_V1V8_SIGEN) 39020ea26a1SKishon Vijay Abraham I reg |= CON_CLKEXTFREE; 39120ea26a1SKishon Vijay Abraham I reg |= CON_PADEN; 39220ea26a1SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_CON, reg); 39320ea26a1SKishon Vijay Abraham I 39420ea26a1SKishon Vijay Abraham I disable_irq(host->irq); 39520ea26a1SKishon Vijay Abraham I ier |= SDHCI_INT_CARD_INT; 39620ea26a1SKishon Vijay Abraham I sdhci_writel(host, ier, SDHCI_INT_ENABLE); 39720ea26a1SKishon Vijay Abraham I sdhci_writel(host, ier, SDHCI_SIGNAL_ENABLE); 39820ea26a1SKishon Vijay Abraham I 39920ea26a1SKishon Vijay Abraham I /* 40020ea26a1SKishon Vijay Abraham I * Delay is required for PSTATE to correctly reflect 40120ea26a1SKishon Vijay Abraham I * DLEV/CLEV values after PADEN is set. 40220ea26a1SKishon Vijay Abraham I */ 40320ea26a1SKishon Vijay Abraham I usleep_range(50, 100); 40420ea26a1SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_PSTATE); 40520ea26a1SKishon Vijay Abraham I if ((reg & PSTATE_DATI) || !(reg & PSTATE_DLEV_DAT0)) 40620ea26a1SKishon Vijay Abraham I ret = true; 40720ea26a1SKishon Vijay Abraham I 40820ea26a1SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CON); 40920ea26a1SKishon Vijay Abraham I reg &= ~(CON_CLKEXTFREE | CON_PADEN); 41020ea26a1SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_CON, reg); 41120ea26a1SKishon Vijay Abraham I 41220ea26a1SKishon Vijay Abraham I sdhci_writel(host, host->ier, SDHCI_INT_ENABLE); 41320ea26a1SKishon Vijay Abraham I sdhci_writel(host, host->ier, SDHCI_SIGNAL_ENABLE); 41420ea26a1SKishon Vijay Abraham I enable_irq(host->irq); 41520ea26a1SKishon Vijay Abraham I 41620ea26a1SKishon Vijay Abraham I return ret; 41720ea26a1SKishon Vijay Abraham I } 41820ea26a1SKishon Vijay Abraham I 4197d326930SKishon Vijay Abraham I static int sdhci_omap_start_signal_voltage_switch(struct mmc_host *mmc, 4207d326930SKishon Vijay Abraham I struct mmc_ios *ios) 4217d326930SKishon Vijay Abraham I { 4227d326930SKishon Vijay Abraham I u32 reg; 4237d326930SKishon Vijay Abraham I int ret; 4247d326930SKishon Vijay Abraham I unsigned int iov; 4257d326930SKishon Vijay Abraham I struct sdhci_host *host = mmc_priv(mmc); 4267d326930SKishon Vijay Abraham I struct sdhci_pltfm_host *pltfm_host; 4277d326930SKishon Vijay Abraham I struct sdhci_omap_host *omap_host; 4287d326930SKishon Vijay Abraham I struct device *dev; 4297d326930SKishon Vijay Abraham I 4307d326930SKishon Vijay Abraham I pltfm_host = sdhci_priv(host); 4317d326930SKishon Vijay Abraham I omap_host = sdhci_pltfm_priv(pltfm_host); 4327d326930SKishon Vijay Abraham I dev = omap_host->dev; 4337d326930SKishon Vijay Abraham I 4347d326930SKishon Vijay Abraham I if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_330) { 4357d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CAPA); 4367d326930SKishon Vijay Abraham I if (!(reg & CAPA_VS33)) 4377d326930SKishon Vijay Abraham I return -EOPNOTSUPP; 4387d326930SKishon Vijay Abraham I 4397d326930SKishon Vijay Abraham I sdhci_omap_conf_bus_power(omap_host, ios->signal_voltage); 4407d326930SKishon Vijay Abraham I 4417d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_AC12); 4427d326930SKishon Vijay Abraham I reg &= ~AC12_V1V8_SIGEN; 4437d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_AC12, reg); 4447d326930SKishon Vijay Abraham I 4457d326930SKishon Vijay Abraham I iov = IOV_3V3; 4467d326930SKishon Vijay Abraham I } else if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_180) { 4477d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CAPA); 4487d326930SKishon Vijay Abraham I if (!(reg & CAPA_VS18)) 4497d326930SKishon Vijay Abraham I return -EOPNOTSUPP; 4507d326930SKishon Vijay Abraham I 4517d326930SKishon Vijay Abraham I sdhci_omap_conf_bus_power(omap_host, ios->signal_voltage); 4527d326930SKishon Vijay Abraham I 4537d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_AC12); 4547d326930SKishon Vijay Abraham I reg |= AC12_V1V8_SIGEN; 4557d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_AC12, reg); 4567d326930SKishon Vijay Abraham I 4577d326930SKishon Vijay Abraham I iov = IOV_1V8; 4587d326930SKishon Vijay Abraham I } else { 4597d326930SKishon Vijay Abraham I return -EOPNOTSUPP; 4607d326930SKishon Vijay Abraham I } 4617d326930SKishon Vijay Abraham I 4627d326930SKishon Vijay Abraham I ret = sdhci_omap_enable_iov(omap_host, iov); 4637d326930SKishon Vijay Abraham I if (ret) { 4647d326930SKishon Vijay Abraham I dev_err(dev, "failed to switch IO voltage to %dmV\n", iov); 4657d326930SKishon Vijay Abraham I return ret; 4667d326930SKishon Vijay Abraham I } 4677d326930SKishon Vijay Abraham I 4687d326930SKishon Vijay Abraham I dev_dbg(dev, "IO voltage switched to %dmV\n", iov); 4697d326930SKishon Vijay Abraham I return 0; 4707d326930SKishon Vijay Abraham I } 4717d326930SKishon Vijay Abraham I 4728d20b2eaSKishon Vijay Abraham I static void sdhci_omap_set_timing(struct sdhci_omap_host *omap_host, u8 timing) 4738d20b2eaSKishon Vijay Abraham I { 4748d20b2eaSKishon Vijay Abraham I int ret; 4758d20b2eaSKishon Vijay Abraham I struct pinctrl_state *pinctrl_state; 4768d20b2eaSKishon Vijay Abraham I struct device *dev = omap_host->dev; 4778d20b2eaSKishon Vijay Abraham I 4788d20b2eaSKishon Vijay Abraham I if (!(omap_host->flags & SDHCI_OMAP_REQUIRE_IODELAY)) 4798d20b2eaSKishon Vijay Abraham I return; 4808d20b2eaSKishon Vijay Abraham I 4818d20b2eaSKishon Vijay Abraham I if (omap_host->timing == timing) 4828d20b2eaSKishon Vijay Abraham I return; 4838d20b2eaSKishon Vijay Abraham I 4848d20b2eaSKishon Vijay Abraham I sdhci_omap_stop_clock(omap_host); 4858d20b2eaSKishon Vijay Abraham I 4868d20b2eaSKishon Vijay Abraham I pinctrl_state = omap_host->pinctrl_state[timing]; 4878d20b2eaSKishon Vijay Abraham I ret = pinctrl_select_state(omap_host->pinctrl, pinctrl_state); 4888d20b2eaSKishon Vijay Abraham I if (ret) { 4898d20b2eaSKishon Vijay Abraham I dev_err(dev, "failed to select pinctrl state\n"); 4908d20b2eaSKishon Vijay Abraham I return; 4918d20b2eaSKishon Vijay Abraham I } 4928d20b2eaSKishon Vijay Abraham I 4938d20b2eaSKishon Vijay Abraham I sdhci_omap_start_clock(omap_host); 4948d20b2eaSKishon Vijay Abraham I omap_host->timing = timing; 4958d20b2eaSKishon Vijay Abraham I } 4968d20b2eaSKishon Vijay Abraham I 497300df508SKishon Vijay Abraham I static void sdhci_omap_set_power_mode(struct sdhci_omap_host *omap_host, 498300df508SKishon Vijay Abraham I u8 power_mode) 499300df508SKishon Vijay Abraham I { 5009fc2cd76SKishon Vijay Abraham I if (omap_host->bus_mode == MMC_POWER_OFF) 5019fc2cd76SKishon Vijay Abraham I sdhci_omap_disable_tuning(omap_host); 502300df508SKishon Vijay Abraham I omap_host->power_mode = power_mode; 503300df508SKishon Vijay Abraham I } 504300df508SKishon Vijay Abraham I 5057d326930SKishon Vijay Abraham I static void sdhci_omap_set_bus_mode(struct sdhci_omap_host *omap_host, 5067d326930SKishon Vijay Abraham I unsigned int mode) 5077d326930SKishon Vijay Abraham I { 5087d326930SKishon Vijay Abraham I u32 reg; 5097d326930SKishon Vijay Abraham I 5107d326930SKishon Vijay Abraham I if (omap_host->bus_mode == mode) 5117d326930SKishon Vijay Abraham I return; 5127d326930SKishon Vijay Abraham I 5137d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CON); 5147d326930SKishon Vijay Abraham I if (mode == MMC_BUSMODE_OPENDRAIN) 5157d326930SKishon Vijay Abraham I reg |= CON_OD; 5167d326930SKishon Vijay Abraham I else 5177d326930SKishon Vijay Abraham I reg &= ~CON_OD; 5187d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_CON, reg); 5197d326930SKishon Vijay Abraham I 5207d326930SKishon Vijay Abraham I omap_host->bus_mode = mode; 5217d326930SKishon Vijay Abraham I } 5227d326930SKishon Vijay Abraham I 523ddde0e7dSColin Ian King static void sdhci_omap_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) 5247d326930SKishon Vijay Abraham I { 5257d326930SKishon Vijay Abraham I struct sdhci_host *host = mmc_priv(mmc); 5267d326930SKishon Vijay Abraham I struct sdhci_pltfm_host *pltfm_host; 5277d326930SKishon Vijay Abraham I struct sdhci_omap_host *omap_host; 5287d326930SKishon Vijay Abraham I 5297d326930SKishon Vijay Abraham I pltfm_host = sdhci_priv(host); 5307d326930SKishon Vijay Abraham I omap_host = sdhci_pltfm_priv(pltfm_host); 5317d326930SKishon Vijay Abraham I 5327d326930SKishon Vijay Abraham I sdhci_omap_set_bus_mode(omap_host, ios->bus_mode); 5338d20b2eaSKishon Vijay Abraham I sdhci_omap_set_timing(omap_host, ios->timing); 5347d326930SKishon Vijay Abraham I sdhci_set_ios(mmc, ios); 535300df508SKishon Vijay Abraham I sdhci_omap_set_power_mode(omap_host, ios->power_mode); 5367d326930SKishon Vijay Abraham I } 5377d326930SKishon Vijay Abraham I 5387d326930SKishon Vijay Abraham I static u16 sdhci_omap_calc_divisor(struct sdhci_pltfm_host *host, 5397d326930SKishon Vijay Abraham I unsigned int clock) 5407d326930SKishon Vijay Abraham I { 5417d326930SKishon Vijay Abraham I u16 dsor; 5427d326930SKishon Vijay Abraham I 5437d326930SKishon Vijay Abraham I dsor = DIV_ROUND_UP(clk_get_rate(host->clk), clock); 5447d326930SKishon Vijay Abraham I if (dsor > SYSCTL_CLKD_MAX) 5457d326930SKishon Vijay Abraham I dsor = SYSCTL_CLKD_MAX; 5467d326930SKishon Vijay Abraham I 5477d326930SKishon Vijay Abraham I return dsor; 5487d326930SKishon Vijay Abraham I } 5497d326930SKishon Vijay Abraham I 5507d326930SKishon Vijay Abraham I static void sdhci_omap_start_clock(struct sdhci_omap_host *omap_host) 5517d326930SKishon Vijay Abraham I { 5527d326930SKishon Vijay Abraham I u32 reg; 5537d326930SKishon Vijay Abraham I 5547d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_SYSCTL); 5557d326930SKishon Vijay Abraham I reg |= SYSCTL_CEN; 5567d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_SYSCTL, reg); 5577d326930SKishon Vijay Abraham I } 5587d326930SKishon Vijay Abraham I 5597d326930SKishon Vijay Abraham I static void sdhci_omap_stop_clock(struct sdhci_omap_host *omap_host) 5607d326930SKishon Vijay Abraham I { 5617d326930SKishon Vijay Abraham I u32 reg; 5627d326930SKishon Vijay Abraham I 5637d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_SYSCTL); 5647d326930SKishon Vijay Abraham I reg &= ~SYSCTL_CEN; 5657d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_SYSCTL, reg); 5667d326930SKishon Vijay Abraham I } 5677d326930SKishon Vijay Abraham I 5687d326930SKishon Vijay Abraham I static void sdhci_omap_set_clock(struct sdhci_host *host, unsigned int clock) 5697d326930SKishon Vijay Abraham I { 5707d326930SKishon Vijay Abraham I struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 5717d326930SKishon Vijay Abraham I struct sdhci_omap_host *omap_host = sdhci_pltfm_priv(pltfm_host); 5727d326930SKishon Vijay Abraham I unsigned long clkdiv; 5737d326930SKishon Vijay Abraham I 5747d326930SKishon Vijay Abraham I sdhci_omap_stop_clock(omap_host); 5757d326930SKishon Vijay Abraham I 5767d326930SKishon Vijay Abraham I if (!clock) 5777d326930SKishon Vijay Abraham I return; 5787d326930SKishon Vijay Abraham I 5797d326930SKishon Vijay Abraham I clkdiv = sdhci_omap_calc_divisor(pltfm_host, clock); 5807d326930SKishon Vijay Abraham I clkdiv = (clkdiv & SYSCTL_CLKD_MASK) << SYSCTL_CLKD_SHIFT; 5817d326930SKishon Vijay Abraham I sdhci_enable_clk(host, clkdiv); 5827d326930SKishon Vijay Abraham I 5837d326930SKishon Vijay Abraham I sdhci_omap_start_clock(omap_host); 5847d326930SKishon Vijay Abraham I } 5857d326930SKishon Vijay Abraham I 586ddde0e7dSColin Ian King static void sdhci_omap_set_power(struct sdhci_host *host, unsigned char mode, 5877d326930SKishon Vijay Abraham I unsigned short vdd) 5887d326930SKishon Vijay Abraham I { 5897d326930SKishon Vijay Abraham I struct mmc_host *mmc = host->mmc; 5907d326930SKishon Vijay Abraham I 5917d326930SKishon Vijay Abraham I mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, vdd); 5927d326930SKishon Vijay Abraham I } 5937d326930SKishon Vijay Abraham I 5947d326930SKishon Vijay Abraham I static int sdhci_omap_enable_dma(struct sdhci_host *host) 5957d326930SKishon Vijay Abraham I { 5967d326930SKishon Vijay Abraham I u32 reg; 5977d326930SKishon Vijay Abraham I struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 5987d326930SKishon Vijay Abraham I struct sdhci_omap_host *omap_host = sdhci_pltfm_priv(pltfm_host); 5997d326930SKishon Vijay Abraham I 6007d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CON); 6017d326930SKishon Vijay Abraham I reg |= CON_DMA_MASTER; 6027d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_CON, reg); 6037d326930SKishon Vijay Abraham I 6047d326930SKishon Vijay Abraham I return 0; 6057d326930SKishon Vijay Abraham I } 6067d326930SKishon Vijay Abraham I 607ddde0e7dSColin Ian King static unsigned int sdhci_omap_get_min_clock(struct sdhci_host *host) 6087d326930SKishon Vijay Abraham I { 6097d326930SKishon Vijay Abraham I struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 6107d326930SKishon Vijay Abraham I 6117d326930SKishon Vijay Abraham I return clk_get_rate(pltfm_host->clk) / SYSCTL_CLKD_MAX; 6127d326930SKishon Vijay Abraham I } 6137d326930SKishon Vijay Abraham I 6147d326930SKishon Vijay Abraham I static void sdhci_omap_set_bus_width(struct sdhci_host *host, int width) 6157d326930SKishon Vijay Abraham I { 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 u32 reg; 6197d326930SKishon Vijay Abraham I 6207d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CON); 6217d326930SKishon Vijay Abraham I if (width == MMC_BUS_WIDTH_8) 6227d326930SKishon Vijay Abraham I reg |= CON_DW8; 6237d326930SKishon Vijay Abraham I else 6247d326930SKishon Vijay Abraham I reg &= ~CON_DW8; 6257d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_CON, reg); 6267d326930SKishon Vijay Abraham I 6277d326930SKishon Vijay Abraham I sdhci_set_bus_width(host, width); 6287d326930SKishon Vijay Abraham I } 6297d326930SKishon Vijay Abraham I 6307d326930SKishon Vijay Abraham I static void sdhci_omap_init_74_clocks(struct sdhci_host *host, u8 power_mode) 6317d326930SKishon Vijay Abraham I { 6327d326930SKishon Vijay Abraham I u32 reg; 6337d326930SKishon Vijay Abraham I ktime_t timeout; 6347d326930SKishon Vijay Abraham I struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 6357d326930SKishon Vijay Abraham I struct sdhci_omap_host *omap_host = sdhci_pltfm_priv(pltfm_host); 6367d326930SKishon Vijay Abraham I 6377d326930SKishon Vijay Abraham I if (omap_host->power_mode == power_mode) 6387d326930SKishon Vijay Abraham I return; 6397d326930SKishon Vijay Abraham I 6407d326930SKishon Vijay Abraham I if (power_mode != MMC_POWER_ON) 6417d326930SKishon Vijay Abraham I return; 6427d326930SKishon Vijay Abraham I 6437d326930SKishon Vijay Abraham I disable_irq(host->irq); 6447d326930SKishon Vijay Abraham I 6457d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CON); 6467d326930SKishon Vijay Abraham I reg |= CON_INIT; 6477d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_CON, reg); 6487d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_CMD, 0x0); 6497d326930SKishon Vijay Abraham I 6507d326930SKishon Vijay Abraham I /* wait 1ms */ 6517d326930SKishon Vijay Abraham I timeout = ktime_add_ms(ktime_get(), SDHCI_OMAP_TIMEOUT); 6527d326930SKishon Vijay Abraham I while (!(sdhci_omap_readl(omap_host, SDHCI_OMAP_STAT) & INT_CC_EN)) { 6537d326930SKishon Vijay Abraham I if (WARN_ON(ktime_after(ktime_get(), timeout))) 6547d326930SKishon Vijay Abraham I return; 6557d326930SKishon Vijay Abraham I usleep_range(5, 10); 6567d326930SKishon Vijay Abraham I } 6577d326930SKishon Vijay Abraham I 6587d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CON); 6597d326930SKishon Vijay Abraham I reg &= ~CON_INIT; 6607d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_CON, reg); 6617d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_STAT, INT_CC_EN); 6627d326930SKishon Vijay Abraham I 6637d326930SKishon Vijay Abraham I enable_irq(host->irq); 6647d326930SKishon Vijay Abraham I } 6657d326930SKishon Vijay Abraham I 66627ceb7e0SKishon Vijay Abraham I static void sdhci_omap_set_uhs_signaling(struct sdhci_host *host, 66727ceb7e0SKishon Vijay Abraham I unsigned int timing) 66827ceb7e0SKishon Vijay Abraham I { 66927ceb7e0SKishon Vijay Abraham I u32 reg; 67027ceb7e0SKishon Vijay Abraham I struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 67127ceb7e0SKishon Vijay Abraham I struct sdhci_omap_host *omap_host = sdhci_pltfm_priv(pltfm_host); 67227ceb7e0SKishon Vijay Abraham I 67327ceb7e0SKishon Vijay Abraham I sdhci_omap_stop_clock(omap_host); 67427ceb7e0SKishon Vijay Abraham I 67527ceb7e0SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CON); 67627ceb7e0SKishon Vijay Abraham I if (timing == MMC_TIMING_UHS_DDR50 || timing == MMC_TIMING_MMC_DDR52) 67727ceb7e0SKishon Vijay Abraham I reg |= CON_DDR; 67827ceb7e0SKishon Vijay Abraham I else 67927ceb7e0SKishon Vijay Abraham I reg &= ~CON_DDR; 68027ceb7e0SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_CON, reg); 68127ceb7e0SKishon Vijay Abraham I 68227ceb7e0SKishon Vijay Abraham I sdhci_set_uhs_signaling(host, timing); 68327ceb7e0SKishon Vijay Abraham I sdhci_omap_start_clock(omap_host); 68427ceb7e0SKishon Vijay Abraham I } 68527ceb7e0SKishon Vijay Abraham I 6867d326930SKishon Vijay Abraham I static struct sdhci_ops sdhci_omap_ops = { 6877d326930SKishon Vijay Abraham I .set_clock = sdhci_omap_set_clock, 6887d326930SKishon Vijay Abraham I .set_power = sdhci_omap_set_power, 6897d326930SKishon Vijay Abraham I .enable_dma = sdhci_omap_enable_dma, 6907d326930SKishon Vijay Abraham I .get_max_clock = sdhci_pltfm_clk_get_max_clock, 6917d326930SKishon Vijay Abraham I .get_min_clock = sdhci_omap_get_min_clock, 6927d326930SKishon Vijay Abraham I .set_bus_width = sdhci_omap_set_bus_width, 6937d326930SKishon Vijay Abraham I .platform_send_init_74_clocks = sdhci_omap_init_74_clocks, 6947d326930SKishon Vijay Abraham I .reset = sdhci_reset, 69527ceb7e0SKishon Vijay Abraham I .set_uhs_signaling = sdhci_omap_set_uhs_signaling, 6967d326930SKishon Vijay Abraham I }; 6977d326930SKishon Vijay Abraham I 6987d326930SKishon Vijay Abraham I static int sdhci_omap_set_capabilities(struct sdhci_omap_host *omap_host) 6997d326930SKishon Vijay Abraham I { 7007d326930SKishon Vijay Abraham I u32 reg; 7017d326930SKishon Vijay Abraham I int ret = 0; 7027d326930SKishon Vijay Abraham I struct device *dev = omap_host->dev; 7037d326930SKishon Vijay Abraham I struct regulator *vqmmc; 7047d326930SKishon Vijay Abraham I 7057d326930SKishon Vijay Abraham I vqmmc = regulator_get(dev, "vqmmc"); 7067d326930SKishon Vijay Abraham I if (IS_ERR(vqmmc)) { 7077d326930SKishon Vijay Abraham I ret = PTR_ERR(vqmmc); 7087d326930SKishon Vijay Abraham I goto reg_put; 7097d326930SKishon Vijay Abraham I } 7107d326930SKishon Vijay Abraham I 7117d326930SKishon Vijay Abraham I /* voltage capabilities might be set by boot loader, clear it */ 7127d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CAPA); 7137d326930SKishon Vijay Abraham I reg &= ~(CAPA_VS18 | CAPA_VS30 | CAPA_VS33); 7147d326930SKishon Vijay Abraham I 7157d326930SKishon Vijay Abraham I if (regulator_is_supported_voltage(vqmmc, IOV_3V3, IOV_3V3)) 7167d326930SKishon Vijay Abraham I reg |= CAPA_VS33; 7177d326930SKishon Vijay Abraham I if (regulator_is_supported_voltage(vqmmc, IOV_1V8, IOV_1V8)) 7187d326930SKishon Vijay Abraham I reg |= CAPA_VS18; 7197d326930SKishon Vijay Abraham I 7207d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_CAPA, reg); 7217d326930SKishon Vijay Abraham I 7227d326930SKishon Vijay Abraham I reg_put: 7237d326930SKishon Vijay Abraham I regulator_put(vqmmc); 7247d326930SKishon Vijay Abraham I 7257d326930SKishon Vijay Abraham I return ret; 7267d326930SKishon Vijay Abraham I } 7277d326930SKishon Vijay Abraham I 7287d326930SKishon Vijay Abraham I static const struct sdhci_pltfm_data sdhci_omap_pdata = { 7297d326930SKishon Vijay Abraham I .quirks = SDHCI_QUIRK_BROKEN_CARD_DETECTION | 7307d326930SKishon Vijay Abraham I SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK | 7317d326930SKishon Vijay Abraham I SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN | 7327d326930SKishon Vijay Abraham I SDHCI_QUIRK_NO_HISPD_BIT | 7337d326930SKishon Vijay Abraham I SDHCI_QUIRK_BROKEN_ADMA_ZEROLEN_DESC, 734e0b2dbcfSKishon Vijay Abraham I .quirks2 = SDHCI_QUIRK2_ACMD23_BROKEN | 735e0b2dbcfSKishon Vijay Abraham I SDHCI_QUIRK2_PRESET_VALUE_BROKEN | 73625f80d86SKishon Vijay Abraham I SDHCI_QUIRK2_RSP_136_HAS_CRC | 73725f80d86SKishon Vijay Abraham I SDHCI_QUIRK2_DISABLE_HW_TIMEOUT, 7387d326930SKishon Vijay Abraham I .ops = &sdhci_omap_ops, 7397d326930SKishon Vijay Abraham I }; 7407d326930SKishon Vijay Abraham I 7416d75df75SKishon Vijay Abraham I static const struct sdhci_omap_data k2g_data = { 7426d75df75SKishon Vijay Abraham I .offset = 0x200, 7436d75df75SKishon Vijay Abraham I }; 7446d75df75SKishon Vijay Abraham I 7457d326930SKishon Vijay Abraham I static const struct sdhci_omap_data dra7_data = { 7467d326930SKishon Vijay Abraham I .offset = 0x200, 7478d20b2eaSKishon Vijay Abraham I .flags = SDHCI_OMAP_REQUIRE_IODELAY, 7487d326930SKishon Vijay Abraham I }; 7497d326930SKishon Vijay Abraham I 7507d326930SKishon Vijay Abraham I static const struct of_device_id omap_sdhci_match[] = { 7517d326930SKishon Vijay Abraham I { .compatible = "ti,dra7-sdhci", .data = &dra7_data }, 7526d75df75SKishon Vijay Abraham I { .compatible = "ti,k2g-sdhci", .data = &k2g_data }, 7537d326930SKishon Vijay Abraham I {}, 7547d326930SKishon Vijay Abraham I }; 7557d326930SKishon Vijay Abraham I MODULE_DEVICE_TABLE(of, omap_sdhci_match); 7567d326930SKishon Vijay Abraham I 7578d20b2eaSKishon Vijay Abraham I static struct pinctrl_state 7588d20b2eaSKishon Vijay Abraham I *sdhci_omap_iodelay_pinctrl_state(struct sdhci_omap_host *omap_host, char *mode, 7598d20b2eaSKishon Vijay Abraham I u32 *caps, u32 capmask) 7608d20b2eaSKishon Vijay Abraham I { 7618d20b2eaSKishon Vijay Abraham I struct device *dev = omap_host->dev; 762212f4f8aSKishon Vijay Abraham I char *version = omap_host->version; 7638d20b2eaSKishon Vijay Abraham I struct pinctrl_state *pinctrl_state = ERR_PTR(-ENODEV); 764212f4f8aSKishon Vijay Abraham I char str[20]; 7658d20b2eaSKishon Vijay Abraham I 7668d20b2eaSKishon Vijay Abraham I if (!(*caps & capmask)) 7678d20b2eaSKishon Vijay Abraham I goto ret; 7688d20b2eaSKishon Vijay Abraham I 769212f4f8aSKishon Vijay Abraham I if (version) { 770212f4f8aSKishon Vijay Abraham I snprintf(str, 20, "%s-%s", mode, version); 771212f4f8aSKishon Vijay Abraham I pinctrl_state = pinctrl_lookup_state(omap_host->pinctrl, str); 772212f4f8aSKishon Vijay Abraham I } 773212f4f8aSKishon Vijay Abraham I 774212f4f8aSKishon Vijay Abraham I if (IS_ERR(pinctrl_state)) 7758d20b2eaSKishon Vijay Abraham I pinctrl_state = pinctrl_lookup_state(omap_host->pinctrl, mode); 776212f4f8aSKishon Vijay Abraham I 7778d20b2eaSKishon Vijay Abraham I if (IS_ERR(pinctrl_state)) { 7788d20b2eaSKishon Vijay Abraham I dev_err(dev, "no pinctrl state for %s mode", mode); 7798d20b2eaSKishon Vijay Abraham I *caps &= ~capmask; 7808d20b2eaSKishon Vijay Abraham I } 7818d20b2eaSKishon Vijay Abraham I 7828d20b2eaSKishon Vijay Abraham I ret: 7838d20b2eaSKishon Vijay Abraham I return pinctrl_state; 7848d20b2eaSKishon Vijay Abraham I } 7858d20b2eaSKishon Vijay Abraham I 7868d20b2eaSKishon Vijay Abraham I static int sdhci_omap_config_iodelay_pinctrl_state(struct sdhci_omap_host 7878d20b2eaSKishon Vijay Abraham I *omap_host) 7888d20b2eaSKishon Vijay Abraham I { 7898d20b2eaSKishon Vijay Abraham I struct device *dev = omap_host->dev; 7908d20b2eaSKishon Vijay Abraham I struct sdhci_host *host = omap_host->host; 7918d20b2eaSKishon Vijay Abraham I struct mmc_host *mmc = host->mmc; 7928d20b2eaSKishon Vijay Abraham I u32 *caps = &mmc->caps; 7938d20b2eaSKishon Vijay Abraham I u32 *caps2 = &mmc->caps2; 7948d20b2eaSKishon Vijay Abraham I struct pinctrl_state *state; 7958d20b2eaSKishon Vijay Abraham I struct pinctrl_state **pinctrl_state; 7968d20b2eaSKishon Vijay Abraham I 7978d20b2eaSKishon Vijay Abraham I if (!(omap_host->flags & SDHCI_OMAP_REQUIRE_IODELAY)) 7988d20b2eaSKishon Vijay Abraham I return 0; 7998d20b2eaSKishon Vijay Abraham I 800a86854d0SKees Cook pinctrl_state = devm_kcalloc(dev, 801a86854d0SKees Cook MMC_TIMING_MMC_HS200 + 1, 802a86854d0SKees Cook sizeof(*pinctrl_state), 803a86854d0SKees Cook GFP_KERNEL); 8048d20b2eaSKishon Vijay Abraham I if (!pinctrl_state) 8058d20b2eaSKishon Vijay Abraham I return -ENOMEM; 8068d20b2eaSKishon Vijay Abraham I 8078d20b2eaSKishon Vijay Abraham I omap_host->pinctrl = devm_pinctrl_get(omap_host->dev); 8088d20b2eaSKishon Vijay Abraham I if (IS_ERR(omap_host->pinctrl)) { 8098d20b2eaSKishon Vijay Abraham I dev_err(dev, "Cannot get pinctrl\n"); 8108d20b2eaSKishon Vijay Abraham I return PTR_ERR(omap_host->pinctrl); 8118d20b2eaSKishon Vijay Abraham I } 8128d20b2eaSKishon Vijay Abraham I 8138d20b2eaSKishon Vijay Abraham I state = pinctrl_lookup_state(omap_host->pinctrl, "default"); 8148d20b2eaSKishon Vijay Abraham I if (IS_ERR(state)) { 8158d20b2eaSKishon Vijay Abraham I dev_err(dev, "no pinctrl state for default mode\n"); 8168d20b2eaSKishon Vijay Abraham I return PTR_ERR(state); 8178d20b2eaSKishon Vijay Abraham I } 8188d20b2eaSKishon Vijay Abraham I pinctrl_state[MMC_TIMING_LEGACY] = state; 8198d20b2eaSKishon Vijay Abraham I 8208d20b2eaSKishon Vijay Abraham I state = sdhci_omap_iodelay_pinctrl_state(omap_host, "sdr104", caps, 8218d20b2eaSKishon Vijay Abraham I MMC_CAP_UHS_SDR104); 8228d20b2eaSKishon Vijay Abraham I if (!IS_ERR(state)) 8238d20b2eaSKishon Vijay Abraham I pinctrl_state[MMC_TIMING_UHS_SDR104] = state; 8248d20b2eaSKishon Vijay Abraham I 8258d20b2eaSKishon Vijay Abraham I state = sdhci_omap_iodelay_pinctrl_state(omap_host, "ddr50", caps, 8268d20b2eaSKishon Vijay Abraham I MMC_CAP_UHS_DDR50); 8278d20b2eaSKishon Vijay Abraham I if (!IS_ERR(state)) 8288d20b2eaSKishon Vijay Abraham I pinctrl_state[MMC_TIMING_UHS_DDR50] = state; 8298d20b2eaSKishon Vijay Abraham I 8308d20b2eaSKishon Vijay Abraham I state = sdhci_omap_iodelay_pinctrl_state(omap_host, "sdr50", caps, 8318d20b2eaSKishon Vijay Abraham I MMC_CAP_UHS_SDR50); 8328d20b2eaSKishon Vijay Abraham I if (!IS_ERR(state)) 8338d20b2eaSKishon Vijay Abraham I pinctrl_state[MMC_TIMING_UHS_SDR50] = state; 8348d20b2eaSKishon Vijay Abraham I 8358d20b2eaSKishon Vijay Abraham I state = sdhci_omap_iodelay_pinctrl_state(omap_host, "sdr25", caps, 8368d20b2eaSKishon Vijay Abraham I MMC_CAP_UHS_SDR25); 8378d20b2eaSKishon Vijay Abraham I if (!IS_ERR(state)) 8388d20b2eaSKishon Vijay Abraham I pinctrl_state[MMC_TIMING_UHS_SDR25] = state; 8398d20b2eaSKishon Vijay Abraham I 8408d20b2eaSKishon Vijay Abraham I state = sdhci_omap_iodelay_pinctrl_state(omap_host, "sdr12", caps, 8418d20b2eaSKishon Vijay Abraham I MMC_CAP_UHS_SDR12); 8428d20b2eaSKishon Vijay Abraham I if (!IS_ERR(state)) 8438d20b2eaSKishon Vijay Abraham I pinctrl_state[MMC_TIMING_UHS_SDR12] = state; 8448d20b2eaSKishon Vijay Abraham I 8458d20b2eaSKishon Vijay Abraham I state = sdhci_omap_iodelay_pinctrl_state(omap_host, "ddr_1_8v", caps, 8468d20b2eaSKishon Vijay Abraham I MMC_CAP_1_8V_DDR); 8473f402878SKishon Vijay Abraham I if (!IS_ERR(state)) { 8483f402878SKishon Vijay Abraham I pinctrl_state[MMC_TIMING_MMC_DDR52] = state; 8493f402878SKishon Vijay Abraham I } else { 8503f402878SKishon Vijay Abraham I state = sdhci_omap_iodelay_pinctrl_state(omap_host, "ddr_3_3v", 8513f402878SKishon Vijay Abraham I caps, 8523f402878SKishon Vijay Abraham I MMC_CAP_3_3V_DDR); 8538d20b2eaSKishon Vijay Abraham I if (!IS_ERR(state)) 8548d20b2eaSKishon Vijay Abraham I pinctrl_state[MMC_TIMING_MMC_DDR52] = state; 8553f402878SKishon Vijay Abraham I } 8568d20b2eaSKishon Vijay Abraham I 8578d20b2eaSKishon Vijay Abraham I state = sdhci_omap_iodelay_pinctrl_state(omap_host, "hs", caps, 8588d20b2eaSKishon Vijay Abraham I MMC_CAP_SD_HIGHSPEED); 8598d20b2eaSKishon Vijay Abraham I if (!IS_ERR(state)) 8608d20b2eaSKishon Vijay Abraham I pinctrl_state[MMC_TIMING_SD_HS] = state; 8618d20b2eaSKishon Vijay Abraham I 8628d20b2eaSKishon Vijay Abraham I state = sdhci_omap_iodelay_pinctrl_state(omap_host, "hs", caps, 8638d20b2eaSKishon Vijay Abraham I MMC_CAP_MMC_HIGHSPEED); 8648d20b2eaSKishon Vijay Abraham I if (!IS_ERR(state)) 8658d20b2eaSKishon Vijay Abraham I pinctrl_state[MMC_TIMING_MMC_HS] = state; 8668d20b2eaSKishon Vijay Abraham I 8678d20b2eaSKishon Vijay Abraham I state = sdhci_omap_iodelay_pinctrl_state(omap_host, "hs200_1_8v", caps2, 8688d20b2eaSKishon Vijay Abraham I MMC_CAP2_HS200_1_8V_SDR); 8698d20b2eaSKishon Vijay Abraham I if (!IS_ERR(state)) 8708d20b2eaSKishon Vijay Abraham I pinctrl_state[MMC_TIMING_MMC_HS200] = state; 8718d20b2eaSKishon Vijay Abraham I 8728d20b2eaSKishon Vijay Abraham I omap_host->pinctrl_state = pinctrl_state; 8738d20b2eaSKishon Vijay Abraham I 8748d20b2eaSKishon Vijay Abraham I return 0; 8758d20b2eaSKishon Vijay Abraham I } 8768d20b2eaSKishon Vijay Abraham I 877212f4f8aSKishon Vijay Abraham I static const struct soc_device_attribute sdhci_omap_soc_devices[] = { 878212f4f8aSKishon Vijay Abraham I { 879212f4f8aSKishon Vijay Abraham I .machine = "DRA7[45]*", 880212f4f8aSKishon Vijay Abraham I .revision = "ES1.[01]", 881212f4f8aSKishon Vijay Abraham I }, 882212f4f8aSKishon Vijay Abraham I { 883212f4f8aSKishon Vijay Abraham I /* sentinel */ 884212f4f8aSKishon Vijay Abraham I } 885212f4f8aSKishon Vijay Abraham I }; 886212f4f8aSKishon Vijay Abraham I 8877d326930SKishon Vijay Abraham I static int sdhci_omap_probe(struct platform_device *pdev) 8887d326930SKishon Vijay Abraham I { 8897d326930SKishon Vijay Abraham I int ret; 8907d326930SKishon Vijay Abraham I u32 offset; 8917d326930SKishon Vijay Abraham I struct device *dev = &pdev->dev; 8927d326930SKishon Vijay Abraham I struct sdhci_host *host; 8937d326930SKishon Vijay Abraham I struct sdhci_pltfm_host *pltfm_host; 8947d326930SKishon Vijay Abraham I struct sdhci_omap_host *omap_host; 8957d326930SKishon Vijay Abraham I struct mmc_host *mmc; 8967d326930SKishon Vijay Abraham I const struct of_device_id *match; 8977d326930SKishon Vijay Abraham I struct sdhci_omap_data *data; 898212f4f8aSKishon Vijay Abraham I const struct soc_device_attribute *soc; 8997d326930SKishon Vijay Abraham I 9007d326930SKishon Vijay Abraham I match = of_match_device(omap_sdhci_match, dev); 9017d326930SKishon Vijay Abraham I if (!match) 9027d326930SKishon Vijay Abraham I return -EINVAL; 9037d326930SKishon Vijay Abraham I 9047d326930SKishon Vijay Abraham I data = (struct sdhci_omap_data *)match->data; 9057d326930SKishon Vijay Abraham I if (!data) { 9067d326930SKishon Vijay Abraham I dev_err(dev, "no sdhci omap data\n"); 9077d326930SKishon Vijay Abraham I return -EINVAL; 9087d326930SKishon Vijay Abraham I } 9097d326930SKishon Vijay Abraham I offset = data->offset; 9107d326930SKishon Vijay Abraham I 9117d326930SKishon Vijay Abraham I host = sdhci_pltfm_init(pdev, &sdhci_omap_pdata, 9127d326930SKishon Vijay Abraham I sizeof(*omap_host)); 9137d326930SKishon Vijay Abraham I if (IS_ERR(host)) { 9147d326930SKishon Vijay Abraham I dev_err(dev, "Failed sdhci_pltfm_init\n"); 9157d326930SKishon Vijay Abraham I return PTR_ERR(host); 9167d326930SKishon Vijay Abraham I } 9177d326930SKishon Vijay Abraham I 9187d326930SKishon Vijay Abraham I pltfm_host = sdhci_priv(host); 9197d326930SKishon Vijay Abraham I omap_host = sdhci_pltfm_priv(pltfm_host); 9207d326930SKishon Vijay Abraham I omap_host->host = host; 9217d326930SKishon Vijay Abraham I omap_host->base = host->ioaddr; 9227d326930SKishon Vijay Abraham I omap_host->dev = dev; 923300df508SKishon Vijay Abraham I omap_host->power_mode = MMC_POWER_UNDEFINED; 9248d20b2eaSKishon Vijay Abraham I omap_host->timing = MMC_TIMING_LEGACY; 9258d20b2eaSKishon Vijay Abraham I omap_host->flags = data->flags; 9267d326930SKishon Vijay Abraham I host->ioaddr += offset; 9277d326930SKishon Vijay Abraham I 9287d326930SKishon Vijay Abraham I mmc = host->mmc; 9291d3a2220SKishon Vijay Abraham I sdhci_get_of_property(pdev); 9307d326930SKishon Vijay Abraham I ret = mmc_of_parse(mmc); 9317d326930SKishon Vijay Abraham I if (ret) 9327d326930SKishon Vijay Abraham I goto err_pltfm_free; 9337d326930SKishon Vijay Abraham I 934212f4f8aSKishon Vijay Abraham I soc = soc_device_match(sdhci_omap_soc_devices); 935212f4f8aSKishon Vijay Abraham I if (soc) { 936212f4f8aSKishon Vijay Abraham I omap_host->version = "rev11"; 937212f4f8aSKishon Vijay Abraham I if (!strcmp(dev_name(dev), "4809c000.mmc")) 938212f4f8aSKishon Vijay Abraham I mmc->f_max = 96000000; 939212f4f8aSKishon Vijay Abraham I if (!strcmp(dev_name(dev), "480b4000.mmc")) 940212f4f8aSKishon Vijay Abraham I mmc->f_max = 48000000; 941212f4f8aSKishon Vijay Abraham I if (!strcmp(dev_name(dev), "480ad000.mmc")) 942212f4f8aSKishon Vijay Abraham I mmc->f_max = 48000000; 943212f4f8aSKishon Vijay Abraham I } 944212f4f8aSKishon Vijay Abraham I 9457d326930SKishon Vijay Abraham I pltfm_host->clk = devm_clk_get(dev, "fck"); 9467d326930SKishon Vijay Abraham I if (IS_ERR(pltfm_host->clk)) { 9477d326930SKishon Vijay Abraham I ret = PTR_ERR(pltfm_host->clk); 9487d326930SKishon Vijay Abraham I goto err_pltfm_free; 9497d326930SKishon Vijay Abraham I } 9507d326930SKishon Vijay Abraham I 9517d326930SKishon Vijay Abraham I ret = clk_set_rate(pltfm_host->clk, mmc->f_max); 9527d326930SKishon Vijay Abraham I if (ret) { 9537d326930SKishon Vijay Abraham I dev_err(dev, "failed to set clock to %d\n", mmc->f_max); 9547d326930SKishon Vijay Abraham I goto err_pltfm_free; 9557d326930SKishon Vijay Abraham I } 9567d326930SKishon Vijay Abraham I 9577d326930SKishon Vijay Abraham I omap_host->pbias = devm_regulator_get_optional(dev, "pbias"); 9587d326930SKishon Vijay Abraham I if (IS_ERR(omap_host->pbias)) { 9597d326930SKishon Vijay Abraham I ret = PTR_ERR(omap_host->pbias); 9607d326930SKishon Vijay Abraham I if (ret != -ENODEV) 9617d326930SKishon Vijay Abraham I goto err_pltfm_free; 9627d326930SKishon Vijay Abraham I dev_dbg(dev, "unable to get pbias regulator %d\n", ret); 9637d326930SKishon Vijay Abraham I } 9647d326930SKishon Vijay Abraham I omap_host->pbias_enabled = false; 9657d326930SKishon Vijay Abraham I 9667d326930SKishon Vijay Abraham I /* 9677d326930SKishon Vijay Abraham I * omap_device_pm_domain has callbacks to enable the main 9687d326930SKishon Vijay Abraham I * functional clock, interface clock and also configure the 9697d326930SKishon Vijay Abraham I * SYSCONFIG register of omap devices. The callback will be invoked 9707d326930SKishon Vijay Abraham I * as part of pm_runtime_get_sync. 9717d326930SKishon Vijay Abraham I */ 9727d326930SKishon Vijay Abraham I pm_runtime_enable(dev); 9737d326930SKishon Vijay Abraham I ret = pm_runtime_get_sync(dev); 9747d326930SKishon Vijay Abraham I if (ret < 0) { 9757d326930SKishon Vijay Abraham I dev_err(dev, "pm_runtime_get_sync failed\n"); 9767d326930SKishon Vijay Abraham I pm_runtime_put_noidle(dev); 9777d326930SKishon Vijay Abraham I goto err_rpm_disable; 9787d326930SKishon Vijay Abraham I } 9797d326930SKishon Vijay Abraham I 9807d326930SKishon Vijay Abraham I ret = sdhci_omap_set_capabilities(omap_host); 9817d326930SKishon Vijay Abraham I if (ret) { 9827d326930SKishon Vijay Abraham I dev_err(dev, "failed to set system capabilities\n"); 9837d326930SKishon Vijay Abraham I goto err_put_sync; 9847d326930SKishon Vijay Abraham I } 9857d326930SKishon Vijay Abraham I 9867d326930SKishon Vijay Abraham I host->mmc_host_ops.get_ro = mmc_gpio_get_ro; 9877d326930SKishon Vijay Abraham I host->mmc_host_ops.start_signal_voltage_switch = 9887d326930SKishon Vijay Abraham I sdhci_omap_start_signal_voltage_switch; 9897d326930SKishon Vijay Abraham I host->mmc_host_ops.set_ios = sdhci_omap_set_ios; 99020ea26a1SKishon Vijay Abraham I host->mmc_host_ops.card_busy = sdhci_omap_card_busy; 9919fc2cd76SKishon Vijay Abraham I host->mmc_host_ops.execute_tuning = sdhci_omap_execute_tuning; 992efde12b2SKishon Vijay Abraham I host->mmc_host_ops.enable_sdio_irq = sdhci_omap_enable_sdio_irq; 9937d326930SKishon Vijay Abraham I 9940ec4ee3cSKishon Vijay Abraham I ret = sdhci_setup_host(host); 9957d326930SKishon Vijay Abraham I if (ret) 9967d326930SKishon Vijay Abraham I goto err_put_sync; 9977d326930SKishon Vijay Abraham I 9980ec4ee3cSKishon Vijay Abraham I ret = sdhci_omap_config_iodelay_pinctrl_state(omap_host); 9990ec4ee3cSKishon Vijay Abraham I if (ret) 10000ec4ee3cSKishon Vijay Abraham I goto err_cleanup_host; 10010ec4ee3cSKishon Vijay Abraham I 10020ec4ee3cSKishon Vijay Abraham I ret = __sdhci_add_host(host); 10030ec4ee3cSKishon Vijay Abraham I if (ret) 10040ec4ee3cSKishon Vijay Abraham I goto err_cleanup_host; 10050ec4ee3cSKishon Vijay Abraham I 10067d326930SKishon Vijay Abraham I return 0; 10077d326930SKishon Vijay Abraham I 10080ec4ee3cSKishon Vijay Abraham I err_cleanup_host: 10090ec4ee3cSKishon Vijay Abraham I sdhci_cleanup_host(host); 10100ec4ee3cSKishon Vijay Abraham I 10117d326930SKishon Vijay Abraham I err_put_sync: 10127d326930SKishon Vijay Abraham I pm_runtime_put_sync(dev); 10137d326930SKishon Vijay Abraham I 10147d326930SKishon Vijay Abraham I err_rpm_disable: 10157d326930SKishon Vijay Abraham I pm_runtime_disable(dev); 10167d326930SKishon Vijay Abraham I 10177d326930SKishon Vijay Abraham I err_pltfm_free: 10187d326930SKishon Vijay Abraham I sdhci_pltfm_free(pdev); 10197d326930SKishon Vijay Abraham I return ret; 10207d326930SKishon Vijay Abraham I } 10217d326930SKishon Vijay Abraham I 10227d326930SKishon Vijay Abraham I static int sdhci_omap_remove(struct platform_device *pdev) 10237d326930SKishon Vijay Abraham I { 10247d326930SKishon Vijay Abraham I struct device *dev = &pdev->dev; 10257d326930SKishon Vijay Abraham I struct sdhci_host *host = platform_get_drvdata(pdev); 10267d326930SKishon Vijay Abraham I 10277d326930SKishon Vijay Abraham I sdhci_remove_host(host, true); 10287d326930SKishon Vijay Abraham I pm_runtime_put_sync(dev); 10297d326930SKishon Vijay Abraham I pm_runtime_disable(dev); 10307d326930SKishon Vijay Abraham I sdhci_pltfm_free(pdev); 10317d326930SKishon Vijay Abraham I 10327d326930SKishon Vijay Abraham I return 0; 10337d326930SKishon Vijay Abraham I } 10347d326930SKishon Vijay Abraham I 10357d326930SKishon Vijay Abraham I static struct platform_driver sdhci_omap_driver = { 10367d326930SKishon Vijay Abraham I .probe = sdhci_omap_probe, 10377d326930SKishon Vijay Abraham I .remove = sdhci_omap_remove, 10387d326930SKishon Vijay Abraham I .driver = { 10397d326930SKishon Vijay Abraham I .name = "sdhci-omap", 10407d326930SKishon Vijay Abraham I .of_match_table = omap_sdhci_match, 10417d326930SKishon Vijay Abraham I }, 10427d326930SKishon Vijay Abraham I }; 10437d326930SKishon Vijay Abraham I 10447d326930SKishon Vijay Abraham I module_platform_driver(sdhci_omap_driver); 10457d326930SKishon Vijay Abraham I 10467d326930SKishon Vijay Abraham I MODULE_DESCRIPTION("SDHCI driver for OMAP SoCs"); 10477d326930SKishon Vijay Abraham I MODULE_AUTHOR("Texas Instruments Inc."); 10487d326930SKishon Vijay Abraham I MODULE_LICENSE("GPL v2"); 10497d326930SKishon Vijay Abraham I MODULE_ALIAS("platform:sdhci_omap"); 1050