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; 1185b0d6210SFaiz Abbas bool is_tuning; 1197d326930SKishon Vijay Abraham I }; 1207d326930SKishon Vijay Abraham I 1218d20b2eaSKishon Vijay Abraham I static void sdhci_omap_start_clock(struct sdhci_omap_host *omap_host); 1228d20b2eaSKishon Vijay Abraham I static void sdhci_omap_stop_clock(struct sdhci_omap_host *omap_host); 1238d20b2eaSKishon Vijay Abraham I 1247d326930SKishon Vijay Abraham I static inline u32 sdhci_omap_readl(struct sdhci_omap_host *host, 1257d326930SKishon Vijay Abraham I unsigned int offset) 1267d326930SKishon Vijay Abraham I { 1277d326930SKishon Vijay Abraham I return readl(host->base + offset); 1287d326930SKishon Vijay Abraham I } 1297d326930SKishon Vijay Abraham I 1307d326930SKishon Vijay Abraham I static inline void sdhci_omap_writel(struct sdhci_omap_host *host, 1317d326930SKishon Vijay Abraham I unsigned int offset, u32 data) 1327d326930SKishon Vijay Abraham I { 1337d326930SKishon Vijay Abraham I writel(data, host->base + offset); 1347d326930SKishon Vijay Abraham I } 1357d326930SKishon Vijay Abraham I 1367d326930SKishon Vijay Abraham I static int sdhci_omap_set_pbias(struct sdhci_omap_host *omap_host, 1377d326930SKishon Vijay Abraham I bool power_on, unsigned int iov) 1387d326930SKishon Vijay Abraham I { 1397d326930SKishon Vijay Abraham I int ret; 1407d326930SKishon Vijay Abraham I struct device *dev = omap_host->dev; 1417d326930SKishon Vijay Abraham I 1427d326930SKishon Vijay Abraham I if (IS_ERR(omap_host->pbias)) 1437d326930SKishon Vijay Abraham I return 0; 1447d326930SKishon Vijay Abraham I 1457d326930SKishon Vijay Abraham I if (power_on) { 1467d326930SKishon Vijay Abraham I ret = regulator_set_voltage(omap_host->pbias, iov, iov); 1477d326930SKishon Vijay Abraham I if (ret) { 1487d326930SKishon Vijay Abraham I dev_err(dev, "pbias set voltage failed\n"); 1497d326930SKishon Vijay Abraham I return ret; 1507d326930SKishon Vijay Abraham I } 1517d326930SKishon Vijay Abraham I 1527d326930SKishon Vijay Abraham I if (omap_host->pbias_enabled) 1537d326930SKishon Vijay Abraham I return 0; 1547d326930SKishon Vijay Abraham I 1557d326930SKishon Vijay Abraham I ret = regulator_enable(omap_host->pbias); 1567d326930SKishon Vijay Abraham I if (ret) { 1577d326930SKishon Vijay Abraham I dev_err(dev, "pbias reg enable fail\n"); 1587d326930SKishon Vijay Abraham I return ret; 1597d326930SKishon Vijay Abraham I } 1607d326930SKishon Vijay Abraham I 1617d326930SKishon Vijay Abraham I omap_host->pbias_enabled = true; 1627d326930SKishon Vijay Abraham I } else { 1637d326930SKishon Vijay Abraham I if (!omap_host->pbias_enabled) 1647d326930SKishon Vijay Abraham I return 0; 1657d326930SKishon Vijay Abraham I 1667d326930SKishon Vijay Abraham I ret = regulator_disable(omap_host->pbias); 1677d326930SKishon Vijay Abraham I if (ret) { 1687d326930SKishon Vijay Abraham I dev_err(dev, "pbias reg disable fail\n"); 1697d326930SKishon Vijay Abraham I return ret; 1707d326930SKishon Vijay Abraham I } 1717d326930SKishon Vijay Abraham I omap_host->pbias_enabled = false; 1727d326930SKishon Vijay Abraham I } 1737d326930SKishon Vijay Abraham I 1747d326930SKishon Vijay Abraham I return 0; 1757d326930SKishon Vijay Abraham I } 1767d326930SKishon Vijay Abraham I 1777d326930SKishon Vijay Abraham I static int sdhci_omap_enable_iov(struct sdhci_omap_host *omap_host, 1787d326930SKishon Vijay Abraham I unsigned int iov) 1797d326930SKishon Vijay Abraham I { 1807d326930SKishon Vijay Abraham I int ret; 1817d326930SKishon Vijay Abraham I struct sdhci_host *host = omap_host->host; 1827d326930SKishon Vijay Abraham I struct mmc_host *mmc = host->mmc; 1837d326930SKishon Vijay Abraham I 1847d326930SKishon Vijay Abraham I ret = sdhci_omap_set_pbias(omap_host, false, 0); 1857d326930SKishon Vijay Abraham I if (ret) 1867d326930SKishon Vijay Abraham I return ret; 1877d326930SKishon Vijay Abraham I 1887d326930SKishon Vijay Abraham I if (!IS_ERR(mmc->supply.vqmmc)) { 1897d326930SKishon Vijay Abraham I ret = regulator_set_voltage(mmc->supply.vqmmc, iov, iov); 1907d326930SKishon Vijay Abraham I if (ret) { 1917d326930SKishon Vijay Abraham I dev_err(mmc_dev(mmc), "vqmmc set voltage failed\n"); 1927d326930SKishon Vijay Abraham I return ret; 1937d326930SKishon Vijay Abraham I } 1947d326930SKishon Vijay Abraham I } 1957d326930SKishon Vijay Abraham I 1967d326930SKishon Vijay Abraham I ret = sdhci_omap_set_pbias(omap_host, true, iov); 1977d326930SKishon Vijay Abraham I if (ret) 1987d326930SKishon Vijay Abraham I return ret; 1997d326930SKishon Vijay Abraham I 2007d326930SKishon Vijay Abraham I return 0; 2017d326930SKishon Vijay Abraham I } 2027d326930SKishon Vijay Abraham I 2037d326930SKishon Vijay Abraham I static void sdhci_omap_conf_bus_power(struct sdhci_omap_host *omap_host, 2047d326930SKishon Vijay Abraham I unsigned char signal_voltage) 2057d326930SKishon Vijay Abraham I { 2067d326930SKishon Vijay Abraham I u32 reg; 2077d326930SKishon Vijay Abraham I ktime_t timeout; 2087d326930SKishon Vijay Abraham I 2097d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_HCTL); 2107d326930SKishon Vijay Abraham I reg &= ~HCTL_SDVS_MASK; 2117d326930SKishon Vijay Abraham I 2127d326930SKishon Vijay Abraham I if (signal_voltage == MMC_SIGNAL_VOLTAGE_330) 2137d326930SKishon Vijay Abraham I reg |= HCTL_SDVS_33; 2147d326930SKishon Vijay Abraham I else 2157d326930SKishon Vijay Abraham I reg |= HCTL_SDVS_18; 2167d326930SKishon Vijay Abraham I 2177d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_HCTL, reg); 2187d326930SKishon Vijay Abraham I 2197d326930SKishon Vijay Abraham I reg |= HCTL_SDBP; 2207d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_HCTL, reg); 2217d326930SKishon Vijay Abraham I 2227d326930SKishon Vijay Abraham I /* wait 1ms */ 2237d326930SKishon Vijay Abraham I timeout = ktime_add_ms(ktime_get(), SDHCI_OMAP_TIMEOUT); 2247d326930SKishon Vijay Abraham I while (!(sdhci_omap_readl(omap_host, SDHCI_OMAP_HCTL) & HCTL_SDBP)) { 2257d326930SKishon Vijay Abraham I if (WARN_ON(ktime_after(ktime_get(), timeout))) 2267d326930SKishon Vijay Abraham I return; 2277d326930SKishon Vijay Abraham I usleep_range(5, 10); 2287d326930SKishon Vijay Abraham I } 2297d326930SKishon Vijay Abraham I } 2307d326930SKishon Vijay Abraham I 231efde12b2SKishon Vijay Abraham I static void sdhci_omap_enable_sdio_irq(struct mmc_host *mmc, int enable) 232efde12b2SKishon Vijay Abraham I { 233efde12b2SKishon Vijay Abraham I struct sdhci_host *host = mmc_priv(mmc); 234efde12b2SKishon Vijay Abraham I struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 235efde12b2SKishon Vijay Abraham I struct sdhci_omap_host *omap_host = sdhci_pltfm_priv(pltfm_host); 236efde12b2SKishon Vijay Abraham I u32 reg; 237efde12b2SKishon Vijay Abraham I 238efde12b2SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CON); 239efde12b2SKishon Vijay Abraham I if (enable) 240efde12b2SKishon Vijay Abraham I reg |= (CON_CTPL | CON_CLKEXTFREE); 241efde12b2SKishon Vijay Abraham I else 242efde12b2SKishon Vijay Abraham I reg &= ~(CON_CTPL | CON_CLKEXTFREE); 243efde12b2SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_CON, reg); 244efde12b2SKishon Vijay Abraham I 245efde12b2SKishon Vijay Abraham I sdhci_enable_sdio_irq(mmc, enable); 246efde12b2SKishon Vijay Abraham I } 247efde12b2SKishon Vijay Abraham I 2489fc2cd76SKishon Vijay Abraham I static inline void sdhci_omap_set_dll(struct sdhci_omap_host *omap_host, 2499fc2cd76SKishon Vijay Abraham I int count) 2509fc2cd76SKishon Vijay Abraham I { 2519fc2cd76SKishon Vijay Abraham I int i; 2529fc2cd76SKishon Vijay Abraham I u32 reg; 2539fc2cd76SKishon Vijay Abraham I 2549fc2cd76SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_DLL); 2559fc2cd76SKishon Vijay Abraham I reg |= DLL_FORCE_VALUE; 2569fc2cd76SKishon Vijay Abraham I reg &= ~DLL_FORCE_SR_C_MASK; 2579fc2cd76SKishon Vijay Abraham I reg |= (count << DLL_FORCE_SR_C_SHIFT); 2589fc2cd76SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_DLL, reg); 2599fc2cd76SKishon Vijay Abraham I 2609fc2cd76SKishon Vijay Abraham I reg |= DLL_CALIB; 2619fc2cd76SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_DLL, reg); 2629fc2cd76SKishon Vijay Abraham I for (i = 0; i < 1000; i++) { 2639fc2cd76SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_DLL); 2649fc2cd76SKishon Vijay Abraham I if (reg & DLL_CALIB) 2659fc2cd76SKishon Vijay Abraham I break; 2669fc2cd76SKishon Vijay Abraham I } 2679fc2cd76SKishon Vijay Abraham I reg &= ~DLL_CALIB; 2689fc2cd76SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_DLL, reg); 2699fc2cd76SKishon Vijay Abraham I } 2709fc2cd76SKishon Vijay Abraham I 2719fc2cd76SKishon Vijay Abraham I static void sdhci_omap_disable_tuning(struct sdhci_omap_host *omap_host) 2729fc2cd76SKishon Vijay Abraham I { 2739fc2cd76SKishon Vijay Abraham I u32 reg; 2749fc2cd76SKishon Vijay Abraham I 2759fc2cd76SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_AC12); 2769fc2cd76SKishon Vijay Abraham I reg &= ~AC12_SCLK_SEL; 2779fc2cd76SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_AC12, reg); 2789fc2cd76SKishon Vijay Abraham I 2799fc2cd76SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_DLL); 2809fc2cd76SKishon Vijay Abraham I reg &= ~(DLL_FORCE_VALUE | DLL_SWT); 2819fc2cd76SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_DLL, reg); 2829fc2cd76SKishon Vijay Abraham I } 2839fc2cd76SKishon Vijay Abraham I 2849fc2cd76SKishon Vijay Abraham I static int sdhci_omap_execute_tuning(struct mmc_host *mmc, u32 opcode) 2859fc2cd76SKishon Vijay Abraham I { 2869fc2cd76SKishon Vijay Abraham I struct sdhci_host *host = mmc_priv(mmc); 2879fc2cd76SKishon Vijay Abraham I struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 2889fc2cd76SKishon Vijay Abraham I struct sdhci_omap_host *omap_host = sdhci_pltfm_priv(pltfm_host); 2899fc2cd76SKishon Vijay Abraham I struct device *dev = omap_host->dev; 2909fc2cd76SKishon Vijay Abraham I struct mmc_ios *ios = &mmc->ios; 2919fc2cd76SKishon Vijay Abraham I u32 start_window = 0, max_window = 0; 292db2039fcSFaiz Abbas bool dcrc_was_enabled = false; 2939fc2cd76SKishon Vijay Abraham I u8 cur_match, prev_match = 0; 2949fc2cd76SKishon Vijay Abraham I u32 length = 0, max_len = 0; 2959fc2cd76SKishon Vijay Abraham I u32 phase_delay = 0; 2969fc2cd76SKishon Vijay Abraham I int ret = 0; 2979fc2cd76SKishon Vijay Abraham I u32 reg; 2989fc2cd76SKishon Vijay Abraham I 2999fc2cd76SKishon Vijay Abraham I pltfm_host = sdhci_priv(host); 3009fc2cd76SKishon Vijay Abraham I omap_host = sdhci_pltfm_priv(pltfm_host); 3019fc2cd76SKishon Vijay Abraham I dev = omap_host->dev; 3029fc2cd76SKishon Vijay Abraham I 3039fc2cd76SKishon Vijay Abraham I /* clock tuning is not needed for upto 52MHz */ 3049fc2cd76SKishon Vijay Abraham I if (ios->clock <= 52000000) 3059fc2cd76SKishon Vijay Abraham I return 0; 3069fc2cd76SKishon Vijay Abraham I 3079fc2cd76SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CAPA2); 3089fc2cd76SKishon Vijay Abraham I if (ios->timing == MMC_TIMING_UHS_SDR50 && !(reg & CAPA2_TSDR50)) 3099fc2cd76SKishon Vijay Abraham I return 0; 3109fc2cd76SKishon Vijay Abraham I 3119fc2cd76SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_DLL); 3129fc2cd76SKishon Vijay Abraham I reg |= DLL_SWT; 3139fc2cd76SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_DLL, reg); 3149fc2cd76SKishon Vijay Abraham I 3157d33c358SKishon Vijay Abraham I /* 3167d33c358SKishon Vijay Abraham I * OMAP5/DRA74X/DRA72x Errata i802: 3177d33c358SKishon Vijay Abraham I * DCRC error interrupts (MMCHS_STAT[21] DCRC=0x1) can occur 3187d33c358SKishon Vijay Abraham I * during the tuning procedure. So disable it during the 3197d33c358SKishon Vijay Abraham I * tuning procedure. 3207d33c358SKishon Vijay Abraham I */ 321db2039fcSFaiz Abbas if (host->ier & SDHCI_INT_DATA_CRC) { 322db2039fcSFaiz Abbas host->ier &= ~SDHCI_INT_DATA_CRC; 323db2039fcSFaiz Abbas dcrc_was_enabled = true; 324db2039fcSFaiz Abbas } 3257d33c358SKishon Vijay Abraham I 3265b0d6210SFaiz Abbas omap_host->is_tuning = true; 3275b0d6210SFaiz Abbas 3289fc2cd76SKishon Vijay Abraham I while (phase_delay <= MAX_PHASE_DELAY) { 3299fc2cd76SKishon Vijay Abraham I sdhci_omap_set_dll(omap_host, phase_delay); 3309fc2cd76SKishon Vijay Abraham I 3319fc2cd76SKishon Vijay Abraham I cur_match = !mmc_send_tuning(mmc, opcode, NULL); 3329fc2cd76SKishon Vijay Abraham I if (cur_match) { 3339fc2cd76SKishon Vijay Abraham I if (prev_match) { 3349fc2cd76SKishon Vijay Abraham I length++; 3359fc2cd76SKishon Vijay Abraham I } else { 3369fc2cd76SKishon Vijay Abraham I start_window = phase_delay; 3379fc2cd76SKishon Vijay Abraham I length = 1; 3389fc2cd76SKishon Vijay Abraham I } 3399fc2cd76SKishon Vijay Abraham I } 3409fc2cd76SKishon Vijay Abraham I 3419fc2cd76SKishon Vijay Abraham I if (length > max_len) { 3429fc2cd76SKishon Vijay Abraham I max_window = start_window; 3439fc2cd76SKishon Vijay Abraham I max_len = length; 3449fc2cd76SKishon Vijay Abraham I } 3459fc2cd76SKishon Vijay Abraham I 3469fc2cd76SKishon Vijay Abraham I prev_match = cur_match; 3479fc2cd76SKishon Vijay Abraham I phase_delay += 4; 3489fc2cd76SKishon Vijay Abraham I } 3499fc2cd76SKishon Vijay Abraham I 3509fc2cd76SKishon Vijay Abraham I if (!max_len) { 3519fc2cd76SKishon Vijay Abraham I dev_err(dev, "Unable to find match\n"); 3529fc2cd76SKishon Vijay Abraham I ret = -EIO; 3539fc2cd76SKishon Vijay Abraham I goto tuning_error; 3549fc2cd76SKishon Vijay Abraham I } 3559fc2cd76SKishon Vijay Abraham I 3569fc2cd76SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_AC12); 3579fc2cd76SKishon Vijay Abraham I if (!(reg & AC12_SCLK_SEL)) { 3589fc2cd76SKishon Vijay Abraham I ret = -EIO; 3599fc2cd76SKishon Vijay Abraham I goto tuning_error; 3609fc2cd76SKishon Vijay Abraham I } 3619fc2cd76SKishon Vijay Abraham I 3629fc2cd76SKishon Vijay Abraham I phase_delay = max_window + 4 * (max_len >> 1); 3639fc2cd76SKishon Vijay Abraham I sdhci_omap_set_dll(omap_host, phase_delay); 3649fc2cd76SKishon Vijay Abraham I 3655b0d6210SFaiz Abbas omap_host->is_tuning = false; 3665b0d6210SFaiz Abbas 3679fc2cd76SKishon Vijay Abraham I goto ret; 3689fc2cd76SKishon Vijay Abraham I 3699fc2cd76SKishon Vijay Abraham I tuning_error: 3705b0d6210SFaiz Abbas omap_host->is_tuning = false; 3719fc2cd76SKishon Vijay Abraham I dev_err(dev, "Tuning failed\n"); 3729fc2cd76SKishon Vijay Abraham I sdhci_omap_disable_tuning(omap_host); 3739fc2cd76SKishon Vijay Abraham I 3749fc2cd76SKishon Vijay Abraham I ret: 3759fc2cd76SKishon Vijay Abraham I sdhci_reset(host, SDHCI_RESET_CMD | SDHCI_RESET_DATA); 376db2039fcSFaiz Abbas /* Reenable forbidden interrupt */ 377db2039fcSFaiz Abbas if (dcrc_was_enabled) 378db2039fcSFaiz Abbas host->ier |= SDHCI_INT_DATA_CRC; 3797d33c358SKishon Vijay Abraham I sdhci_writel(host, host->ier, SDHCI_INT_ENABLE); 3807d33c358SKishon Vijay Abraham I sdhci_writel(host, host->ier, SDHCI_SIGNAL_ENABLE); 3819fc2cd76SKishon Vijay Abraham I return ret; 3829fc2cd76SKishon Vijay Abraham I } 3839fc2cd76SKishon Vijay Abraham I 38420ea26a1SKishon Vijay Abraham I static int sdhci_omap_card_busy(struct mmc_host *mmc) 38520ea26a1SKishon Vijay Abraham I { 38620ea26a1SKishon Vijay Abraham I u32 reg, ac12; 38720ea26a1SKishon Vijay Abraham I int ret = false; 38820ea26a1SKishon Vijay Abraham I struct sdhci_host *host = mmc_priv(mmc); 38920ea26a1SKishon Vijay Abraham I struct sdhci_pltfm_host *pltfm_host; 39020ea26a1SKishon Vijay Abraham I struct sdhci_omap_host *omap_host; 39120ea26a1SKishon Vijay Abraham I u32 ier = host->ier; 39220ea26a1SKishon Vijay Abraham I 39320ea26a1SKishon Vijay Abraham I pltfm_host = sdhci_priv(host); 39420ea26a1SKishon Vijay Abraham I omap_host = sdhci_pltfm_priv(pltfm_host); 39520ea26a1SKishon Vijay Abraham I 39620ea26a1SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CON); 39720ea26a1SKishon Vijay Abraham I ac12 = sdhci_omap_readl(omap_host, SDHCI_OMAP_AC12); 39820ea26a1SKishon Vijay Abraham I reg &= ~CON_CLKEXTFREE; 39920ea26a1SKishon Vijay Abraham I if (ac12 & AC12_V1V8_SIGEN) 40020ea26a1SKishon Vijay Abraham I reg |= CON_CLKEXTFREE; 40120ea26a1SKishon Vijay Abraham I reg |= CON_PADEN; 40220ea26a1SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_CON, reg); 40320ea26a1SKishon Vijay Abraham I 40420ea26a1SKishon Vijay Abraham I disable_irq(host->irq); 40520ea26a1SKishon Vijay Abraham I ier |= SDHCI_INT_CARD_INT; 40620ea26a1SKishon Vijay Abraham I sdhci_writel(host, ier, SDHCI_INT_ENABLE); 40720ea26a1SKishon Vijay Abraham I sdhci_writel(host, ier, SDHCI_SIGNAL_ENABLE); 40820ea26a1SKishon Vijay Abraham I 40920ea26a1SKishon Vijay Abraham I /* 41020ea26a1SKishon Vijay Abraham I * Delay is required for PSTATE to correctly reflect 41120ea26a1SKishon Vijay Abraham I * DLEV/CLEV values after PADEN is set. 41220ea26a1SKishon Vijay Abraham I */ 41320ea26a1SKishon Vijay Abraham I usleep_range(50, 100); 41420ea26a1SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_PSTATE); 41520ea26a1SKishon Vijay Abraham I if ((reg & PSTATE_DATI) || !(reg & PSTATE_DLEV_DAT0)) 41620ea26a1SKishon Vijay Abraham I ret = true; 41720ea26a1SKishon Vijay Abraham I 41820ea26a1SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CON); 41920ea26a1SKishon Vijay Abraham I reg &= ~(CON_CLKEXTFREE | CON_PADEN); 42020ea26a1SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_CON, reg); 42120ea26a1SKishon Vijay Abraham I 42220ea26a1SKishon Vijay Abraham I sdhci_writel(host, host->ier, SDHCI_INT_ENABLE); 42320ea26a1SKishon Vijay Abraham I sdhci_writel(host, host->ier, SDHCI_SIGNAL_ENABLE); 42420ea26a1SKishon Vijay Abraham I enable_irq(host->irq); 42520ea26a1SKishon Vijay Abraham I 42620ea26a1SKishon Vijay Abraham I return ret; 42720ea26a1SKishon Vijay Abraham I } 42820ea26a1SKishon Vijay Abraham I 4297d326930SKishon Vijay Abraham I static int sdhci_omap_start_signal_voltage_switch(struct mmc_host *mmc, 4307d326930SKishon Vijay Abraham I struct mmc_ios *ios) 4317d326930SKishon Vijay Abraham I { 4327d326930SKishon Vijay Abraham I u32 reg; 4337d326930SKishon Vijay Abraham I int ret; 4347d326930SKishon Vijay Abraham I unsigned int iov; 4357d326930SKishon Vijay Abraham I struct sdhci_host *host = mmc_priv(mmc); 4367d326930SKishon Vijay Abraham I struct sdhci_pltfm_host *pltfm_host; 4377d326930SKishon Vijay Abraham I struct sdhci_omap_host *omap_host; 4387d326930SKishon Vijay Abraham I struct device *dev; 4397d326930SKishon Vijay Abraham I 4407d326930SKishon Vijay Abraham I pltfm_host = sdhci_priv(host); 4417d326930SKishon Vijay Abraham I omap_host = sdhci_pltfm_priv(pltfm_host); 4427d326930SKishon Vijay Abraham I dev = omap_host->dev; 4437d326930SKishon Vijay Abraham I 4447d326930SKishon Vijay Abraham I if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_330) { 4457d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CAPA); 4467d326930SKishon Vijay Abraham I if (!(reg & CAPA_VS33)) 4477d326930SKishon Vijay Abraham I return -EOPNOTSUPP; 4487d326930SKishon Vijay Abraham I 4497d326930SKishon Vijay Abraham I sdhci_omap_conf_bus_power(omap_host, ios->signal_voltage); 4507d326930SKishon Vijay Abraham I 4517d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_AC12); 4527d326930SKishon Vijay Abraham I reg &= ~AC12_V1V8_SIGEN; 4537d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_AC12, reg); 4547d326930SKishon Vijay Abraham I 4557d326930SKishon Vijay Abraham I iov = IOV_3V3; 4567d326930SKishon Vijay Abraham I } else if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_180) { 4577d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CAPA); 4587d326930SKishon Vijay Abraham I if (!(reg & CAPA_VS18)) 4597d326930SKishon Vijay Abraham I return -EOPNOTSUPP; 4607d326930SKishon Vijay Abraham I 4617d326930SKishon Vijay Abraham I sdhci_omap_conf_bus_power(omap_host, ios->signal_voltage); 4627d326930SKishon Vijay Abraham I 4637d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_AC12); 4647d326930SKishon Vijay Abraham I reg |= AC12_V1V8_SIGEN; 4657d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_AC12, reg); 4667d326930SKishon Vijay Abraham I 4677d326930SKishon Vijay Abraham I iov = IOV_1V8; 4687d326930SKishon Vijay Abraham I } else { 4697d326930SKishon Vijay Abraham I return -EOPNOTSUPP; 4707d326930SKishon Vijay Abraham I } 4717d326930SKishon Vijay Abraham I 4727d326930SKishon Vijay Abraham I ret = sdhci_omap_enable_iov(omap_host, iov); 4737d326930SKishon Vijay Abraham I if (ret) { 4747d326930SKishon Vijay Abraham I dev_err(dev, "failed to switch IO voltage to %dmV\n", iov); 4757d326930SKishon Vijay Abraham I return ret; 4767d326930SKishon Vijay Abraham I } 4777d326930SKishon Vijay Abraham I 4787d326930SKishon Vijay Abraham I dev_dbg(dev, "IO voltage switched to %dmV\n", iov); 4797d326930SKishon Vijay Abraham I return 0; 4807d326930SKishon Vijay Abraham I } 4817d326930SKishon Vijay Abraham I 4828d20b2eaSKishon Vijay Abraham I static void sdhci_omap_set_timing(struct sdhci_omap_host *omap_host, u8 timing) 4838d20b2eaSKishon Vijay Abraham I { 4848d20b2eaSKishon Vijay Abraham I int ret; 4858d20b2eaSKishon Vijay Abraham I struct pinctrl_state *pinctrl_state; 4868d20b2eaSKishon Vijay Abraham I struct device *dev = omap_host->dev; 4878d20b2eaSKishon Vijay Abraham I 4888d20b2eaSKishon Vijay Abraham I if (!(omap_host->flags & SDHCI_OMAP_REQUIRE_IODELAY)) 4898d20b2eaSKishon Vijay Abraham I return; 4908d20b2eaSKishon Vijay Abraham I 4918d20b2eaSKishon Vijay Abraham I if (omap_host->timing == timing) 4928d20b2eaSKishon Vijay Abraham I return; 4938d20b2eaSKishon Vijay Abraham I 4948d20b2eaSKishon Vijay Abraham I sdhci_omap_stop_clock(omap_host); 4958d20b2eaSKishon Vijay Abraham I 4968d20b2eaSKishon Vijay Abraham I pinctrl_state = omap_host->pinctrl_state[timing]; 4978d20b2eaSKishon Vijay Abraham I ret = pinctrl_select_state(omap_host->pinctrl, pinctrl_state); 4988d20b2eaSKishon Vijay Abraham I if (ret) { 4998d20b2eaSKishon Vijay Abraham I dev_err(dev, "failed to select pinctrl state\n"); 5008d20b2eaSKishon Vijay Abraham I return; 5018d20b2eaSKishon Vijay Abraham I } 5028d20b2eaSKishon Vijay Abraham I 5038d20b2eaSKishon Vijay Abraham I sdhci_omap_start_clock(omap_host); 5048d20b2eaSKishon Vijay Abraham I omap_host->timing = timing; 5058d20b2eaSKishon Vijay Abraham I } 5068d20b2eaSKishon Vijay Abraham I 507300df508SKishon Vijay Abraham I static void sdhci_omap_set_power_mode(struct sdhci_omap_host *omap_host, 508300df508SKishon Vijay Abraham I u8 power_mode) 509300df508SKishon Vijay Abraham I { 5109fc2cd76SKishon Vijay Abraham I if (omap_host->bus_mode == MMC_POWER_OFF) 5119fc2cd76SKishon Vijay Abraham I sdhci_omap_disable_tuning(omap_host); 512300df508SKishon Vijay Abraham I omap_host->power_mode = power_mode; 513300df508SKishon Vijay Abraham I } 514300df508SKishon Vijay Abraham I 5157d326930SKishon Vijay Abraham I static void sdhci_omap_set_bus_mode(struct sdhci_omap_host *omap_host, 5167d326930SKishon Vijay Abraham I unsigned int mode) 5177d326930SKishon Vijay Abraham I { 5187d326930SKishon Vijay Abraham I u32 reg; 5197d326930SKishon Vijay Abraham I 5207d326930SKishon Vijay Abraham I if (omap_host->bus_mode == mode) 5217d326930SKishon Vijay Abraham I return; 5227d326930SKishon Vijay Abraham I 5237d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CON); 5247d326930SKishon Vijay Abraham I if (mode == MMC_BUSMODE_OPENDRAIN) 5257d326930SKishon Vijay Abraham I reg |= CON_OD; 5267d326930SKishon Vijay Abraham I else 5277d326930SKishon Vijay Abraham I reg &= ~CON_OD; 5287d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_CON, reg); 5297d326930SKishon Vijay Abraham I 5307d326930SKishon Vijay Abraham I omap_host->bus_mode = mode; 5317d326930SKishon Vijay Abraham I } 5327d326930SKishon Vijay Abraham I 533ddde0e7dSColin Ian King static void sdhci_omap_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) 5347d326930SKishon Vijay Abraham I { 5357d326930SKishon Vijay Abraham I struct sdhci_host *host = mmc_priv(mmc); 5367d326930SKishon Vijay Abraham I struct sdhci_pltfm_host *pltfm_host; 5377d326930SKishon Vijay Abraham I struct sdhci_omap_host *omap_host; 5387d326930SKishon Vijay Abraham I 5397d326930SKishon Vijay Abraham I pltfm_host = sdhci_priv(host); 5407d326930SKishon Vijay Abraham I omap_host = sdhci_pltfm_priv(pltfm_host); 5417d326930SKishon Vijay Abraham I 5427d326930SKishon Vijay Abraham I sdhci_omap_set_bus_mode(omap_host, ios->bus_mode); 5438d20b2eaSKishon Vijay Abraham I sdhci_omap_set_timing(omap_host, ios->timing); 5447d326930SKishon Vijay Abraham I sdhci_set_ios(mmc, ios); 545300df508SKishon Vijay Abraham I sdhci_omap_set_power_mode(omap_host, ios->power_mode); 5467d326930SKishon Vijay Abraham I } 5477d326930SKishon Vijay Abraham I 5487d326930SKishon Vijay Abraham I static u16 sdhci_omap_calc_divisor(struct sdhci_pltfm_host *host, 5497d326930SKishon Vijay Abraham I unsigned int clock) 5507d326930SKishon Vijay Abraham I { 5517d326930SKishon Vijay Abraham I u16 dsor; 5527d326930SKishon Vijay Abraham I 5537d326930SKishon Vijay Abraham I dsor = DIV_ROUND_UP(clk_get_rate(host->clk), clock); 5547d326930SKishon Vijay Abraham I if (dsor > SYSCTL_CLKD_MAX) 5557d326930SKishon Vijay Abraham I dsor = SYSCTL_CLKD_MAX; 5567d326930SKishon Vijay Abraham I 5577d326930SKishon Vijay Abraham I return dsor; 5587d326930SKishon Vijay Abraham I } 5597d326930SKishon Vijay Abraham I 5607d326930SKishon Vijay Abraham I static void sdhci_omap_start_clock(struct sdhci_omap_host *omap_host) 5617d326930SKishon Vijay Abraham I { 5627d326930SKishon Vijay Abraham I u32 reg; 5637d326930SKishon Vijay Abraham I 5647d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_SYSCTL); 5657d326930SKishon Vijay Abraham I reg |= SYSCTL_CEN; 5667d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_SYSCTL, reg); 5677d326930SKishon Vijay Abraham I } 5687d326930SKishon Vijay Abraham I 5697d326930SKishon Vijay Abraham I static void sdhci_omap_stop_clock(struct sdhci_omap_host *omap_host) 5707d326930SKishon Vijay Abraham I { 5717d326930SKishon Vijay Abraham I u32 reg; 5727d326930SKishon Vijay Abraham I 5737d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_SYSCTL); 5747d326930SKishon Vijay Abraham I reg &= ~SYSCTL_CEN; 5757d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_SYSCTL, reg); 5767d326930SKishon Vijay Abraham I } 5777d326930SKishon Vijay Abraham I 5787d326930SKishon Vijay Abraham I static void sdhci_omap_set_clock(struct sdhci_host *host, unsigned int clock) 5797d326930SKishon Vijay Abraham I { 5807d326930SKishon Vijay Abraham I struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 5817d326930SKishon Vijay Abraham I struct sdhci_omap_host *omap_host = sdhci_pltfm_priv(pltfm_host); 5827d326930SKishon Vijay Abraham I unsigned long clkdiv; 5837d326930SKishon Vijay Abraham I 5847d326930SKishon Vijay Abraham I sdhci_omap_stop_clock(omap_host); 5857d326930SKishon Vijay Abraham I 5867d326930SKishon Vijay Abraham I if (!clock) 5877d326930SKishon Vijay Abraham I return; 5887d326930SKishon Vijay Abraham I 5897d326930SKishon Vijay Abraham I clkdiv = sdhci_omap_calc_divisor(pltfm_host, clock); 5907d326930SKishon Vijay Abraham I clkdiv = (clkdiv & SYSCTL_CLKD_MASK) << SYSCTL_CLKD_SHIFT; 5917d326930SKishon Vijay Abraham I sdhci_enable_clk(host, clkdiv); 5927d326930SKishon Vijay Abraham I 5937d326930SKishon Vijay Abraham I sdhci_omap_start_clock(omap_host); 5947d326930SKishon Vijay Abraham I } 5957d326930SKishon Vijay Abraham I 596ddde0e7dSColin Ian King static void sdhci_omap_set_power(struct sdhci_host *host, unsigned char mode, 5977d326930SKishon Vijay Abraham I unsigned short vdd) 5987d326930SKishon Vijay Abraham I { 5997d326930SKishon Vijay Abraham I struct mmc_host *mmc = host->mmc; 6007d326930SKishon Vijay Abraham I 6017d326930SKishon Vijay Abraham I mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, vdd); 6027d326930SKishon Vijay Abraham I } 6037d326930SKishon Vijay Abraham I 6047d326930SKishon Vijay Abraham I static int sdhci_omap_enable_dma(struct sdhci_host *host) 6057d326930SKishon Vijay Abraham I { 6067d326930SKishon Vijay Abraham I u32 reg; 6077d326930SKishon Vijay Abraham I struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 6087d326930SKishon Vijay Abraham I struct sdhci_omap_host *omap_host = sdhci_pltfm_priv(pltfm_host); 6097d326930SKishon Vijay Abraham I 6107d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CON); 6117d326930SKishon Vijay Abraham I reg |= CON_DMA_MASTER; 6127d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_CON, reg); 6137d326930SKishon Vijay Abraham I 6147d326930SKishon Vijay Abraham I return 0; 6157d326930SKishon Vijay Abraham I } 6167d326930SKishon Vijay Abraham I 617ddde0e7dSColin Ian King static unsigned int sdhci_omap_get_min_clock(struct sdhci_host *host) 6187d326930SKishon Vijay Abraham I { 6197d326930SKishon Vijay Abraham I struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 6207d326930SKishon Vijay Abraham I 6217d326930SKishon Vijay Abraham I return clk_get_rate(pltfm_host->clk) / SYSCTL_CLKD_MAX; 6227d326930SKishon Vijay Abraham I } 6237d326930SKishon Vijay Abraham I 6247d326930SKishon Vijay Abraham I static void sdhci_omap_set_bus_width(struct sdhci_host *host, int width) 6257d326930SKishon Vijay Abraham I { 6267d326930SKishon Vijay Abraham I struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 6277d326930SKishon Vijay Abraham I struct sdhci_omap_host *omap_host = sdhci_pltfm_priv(pltfm_host); 6287d326930SKishon Vijay Abraham I u32 reg; 6297d326930SKishon Vijay Abraham I 6307d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CON); 6317d326930SKishon Vijay Abraham I if (width == MMC_BUS_WIDTH_8) 6327d326930SKishon Vijay Abraham I reg |= CON_DW8; 6337d326930SKishon Vijay Abraham I else 6347d326930SKishon Vijay Abraham I reg &= ~CON_DW8; 6357d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_CON, reg); 6367d326930SKishon Vijay Abraham I 6377d326930SKishon Vijay Abraham I sdhci_set_bus_width(host, width); 6387d326930SKishon Vijay Abraham I } 6397d326930SKishon Vijay Abraham I 6407d326930SKishon Vijay Abraham I static void sdhci_omap_init_74_clocks(struct sdhci_host *host, u8 power_mode) 6417d326930SKishon Vijay Abraham I { 6427d326930SKishon Vijay Abraham I u32 reg; 6437d326930SKishon Vijay Abraham I ktime_t timeout; 6447d326930SKishon Vijay Abraham I struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 6457d326930SKishon Vijay Abraham I struct sdhci_omap_host *omap_host = sdhci_pltfm_priv(pltfm_host); 6467d326930SKishon Vijay Abraham I 6477d326930SKishon Vijay Abraham I if (omap_host->power_mode == power_mode) 6487d326930SKishon Vijay Abraham I return; 6497d326930SKishon Vijay Abraham I 6507d326930SKishon Vijay Abraham I if (power_mode != MMC_POWER_ON) 6517d326930SKishon Vijay Abraham I return; 6527d326930SKishon Vijay Abraham I 6537d326930SKishon Vijay Abraham I disable_irq(host->irq); 6547d326930SKishon Vijay Abraham I 6557d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CON); 6567d326930SKishon Vijay Abraham I reg |= CON_INIT; 6577d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_CON, reg); 6587d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_CMD, 0x0); 6597d326930SKishon Vijay Abraham I 6607d326930SKishon Vijay Abraham I /* wait 1ms */ 6617d326930SKishon Vijay Abraham I timeout = ktime_add_ms(ktime_get(), SDHCI_OMAP_TIMEOUT); 6627d326930SKishon Vijay Abraham I while (!(sdhci_omap_readl(omap_host, SDHCI_OMAP_STAT) & INT_CC_EN)) { 6637d326930SKishon Vijay Abraham I if (WARN_ON(ktime_after(ktime_get(), timeout))) 6647d326930SKishon Vijay Abraham I return; 6657d326930SKishon Vijay Abraham I usleep_range(5, 10); 6667d326930SKishon Vijay Abraham I } 6677d326930SKishon Vijay Abraham I 6687d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CON); 6697d326930SKishon Vijay Abraham I reg &= ~CON_INIT; 6707d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_CON, reg); 6717d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_STAT, INT_CC_EN); 6727d326930SKishon Vijay Abraham I 6737d326930SKishon Vijay Abraham I enable_irq(host->irq); 6747d326930SKishon Vijay Abraham I } 6757d326930SKishon Vijay Abraham I 67627ceb7e0SKishon Vijay Abraham I static void sdhci_omap_set_uhs_signaling(struct sdhci_host *host, 67727ceb7e0SKishon Vijay Abraham I unsigned int timing) 67827ceb7e0SKishon Vijay Abraham I { 67927ceb7e0SKishon Vijay Abraham I u32 reg; 68027ceb7e0SKishon Vijay Abraham I struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 68127ceb7e0SKishon Vijay Abraham I struct sdhci_omap_host *omap_host = sdhci_pltfm_priv(pltfm_host); 68227ceb7e0SKishon Vijay Abraham I 68327ceb7e0SKishon Vijay Abraham I sdhci_omap_stop_clock(omap_host); 68427ceb7e0SKishon Vijay Abraham I 68527ceb7e0SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CON); 68627ceb7e0SKishon Vijay Abraham I if (timing == MMC_TIMING_UHS_DDR50 || timing == MMC_TIMING_MMC_DDR52) 68727ceb7e0SKishon Vijay Abraham I reg |= CON_DDR; 68827ceb7e0SKishon Vijay Abraham I else 68927ceb7e0SKishon Vijay Abraham I reg &= ~CON_DDR; 69027ceb7e0SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_CON, reg); 69127ceb7e0SKishon Vijay Abraham I 69227ceb7e0SKishon Vijay Abraham I sdhci_set_uhs_signaling(host, timing); 69327ceb7e0SKishon Vijay Abraham I sdhci_omap_start_clock(omap_host); 69427ceb7e0SKishon Vijay Abraham I } 69527ceb7e0SKishon Vijay Abraham I 6965b0d6210SFaiz Abbas void sdhci_omap_reset(struct sdhci_host *host, u8 mask) 6975b0d6210SFaiz Abbas { 6985b0d6210SFaiz Abbas struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 6995b0d6210SFaiz Abbas struct sdhci_omap_host *omap_host = sdhci_pltfm_priv(pltfm_host); 7005b0d6210SFaiz Abbas 7015b0d6210SFaiz Abbas /* Don't reset data lines during tuning operation */ 7025b0d6210SFaiz Abbas if (omap_host->is_tuning) 7035b0d6210SFaiz Abbas mask &= ~SDHCI_RESET_DATA; 7045b0d6210SFaiz Abbas 7055b0d6210SFaiz Abbas sdhci_reset(host, mask); 7065b0d6210SFaiz Abbas } 7075b0d6210SFaiz Abbas 7087d326930SKishon Vijay Abraham I static struct sdhci_ops sdhci_omap_ops = { 7097d326930SKishon Vijay Abraham I .set_clock = sdhci_omap_set_clock, 7107d326930SKishon Vijay Abraham I .set_power = sdhci_omap_set_power, 7117d326930SKishon Vijay Abraham I .enable_dma = sdhci_omap_enable_dma, 7127d326930SKishon Vijay Abraham I .get_max_clock = sdhci_pltfm_clk_get_max_clock, 7137d326930SKishon Vijay Abraham I .get_min_clock = sdhci_omap_get_min_clock, 7147d326930SKishon Vijay Abraham I .set_bus_width = sdhci_omap_set_bus_width, 7157d326930SKishon Vijay Abraham I .platform_send_init_74_clocks = sdhci_omap_init_74_clocks, 7165b0d6210SFaiz Abbas .reset = sdhci_omap_reset, 71727ceb7e0SKishon Vijay Abraham I .set_uhs_signaling = sdhci_omap_set_uhs_signaling, 7187d326930SKishon Vijay Abraham I }; 7197d326930SKishon Vijay Abraham I 7207d326930SKishon Vijay Abraham I static int sdhci_omap_set_capabilities(struct sdhci_omap_host *omap_host) 7217d326930SKishon Vijay Abraham I { 7227d326930SKishon Vijay Abraham I u32 reg; 7237d326930SKishon Vijay Abraham I int ret = 0; 7247d326930SKishon Vijay Abraham I struct device *dev = omap_host->dev; 7257d326930SKishon Vijay Abraham I struct regulator *vqmmc; 7267d326930SKishon Vijay Abraham I 7277d326930SKishon Vijay Abraham I vqmmc = regulator_get(dev, "vqmmc"); 7287d326930SKishon Vijay Abraham I if (IS_ERR(vqmmc)) { 7297d326930SKishon Vijay Abraham I ret = PTR_ERR(vqmmc); 7307d326930SKishon Vijay Abraham I goto reg_put; 7317d326930SKishon Vijay Abraham I } 7327d326930SKishon Vijay Abraham I 7337d326930SKishon Vijay Abraham I /* voltage capabilities might be set by boot loader, clear it */ 7347d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CAPA); 7357d326930SKishon Vijay Abraham I reg &= ~(CAPA_VS18 | CAPA_VS30 | CAPA_VS33); 7367d326930SKishon Vijay Abraham I 7377d326930SKishon Vijay Abraham I if (regulator_is_supported_voltage(vqmmc, IOV_3V3, IOV_3V3)) 7387d326930SKishon Vijay Abraham I reg |= CAPA_VS33; 7397d326930SKishon Vijay Abraham I if (regulator_is_supported_voltage(vqmmc, IOV_1V8, IOV_1V8)) 7407d326930SKishon Vijay Abraham I reg |= CAPA_VS18; 7417d326930SKishon Vijay Abraham I 7427d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_CAPA, reg); 7437d326930SKishon Vijay Abraham I 7447d326930SKishon Vijay Abraham I reg_put: 7457d326930SKishon Vijay Abraham I regulator_put(vqmmc); 7467d326930SKishon Vijay Abraham I 7477d326930SKishon Vijay Abraham I return ret; 7487d326930SKishon Vijay Abraham I } 7497d326930SKishon Vijay Abraham I 7507d326930SKishon Vijay Abraham I static const struct sdhci_pltfm_data sdhci_omap_pdata = { 7517d326930SKishon Vijay Abraham I .quirks = SDHCI_QUIRK_BROKEN_CARD_DETECTION | 7527d326930SKishon Vijay Abraham I SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK | 7537d326930SKishon Vijay Abraham I SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN | 7547d326930SKishon Vijay Abraham I SDHCI_QUIRK_NO_HISPD_BIT | 7557d326930SKishon Vijay Abraham I SDHCI_QUIRK_BROKEN_ADMA_ZEROLEN_DESC, 756e0b2dbcfSKishon Vijay Abraham I .quirks2 = SDHCI_QUIRK2_ACMD23_BROKEN | 757e0b2dbcfSKishon Vijay Abraham I SDHCI_QUIRK2_PRESET_VALUE_BROKEN | 75825f80d86SKishon Vijay Abraham I SDHCI_QUIRK2_RSP_136_HAS_CRC | 75925f80d86SKishon Vijay Abraham I SDHCI_QUIRK2_DISABLE_HW_TIMEOUT, 7607d326930SKishon Vijay Abraham I .ops = &sdhci_omap_ops, 7617d326930SKishon Vijay Abraham I }; 7627d326930SKishon Vijay Abraham I 7636d75df75SKishon Vijay Abraham I static const struct sdhci_omap_data k2g_data = { 7646d75df75SKishon Vijay Abraham I .offset = 0x200, 7656d75df75SKishon Vijay Abraham I }; 7666d75df75SKishon Vijay Abraham I 7677d326930SKishon Vijay Abraham I static const struct sdhci_omap_data dra7_data = { 7687d326930SKishon Vijay Abraham I .offset = 0x200, 7698d20b2eaSKishon Vijay Abraham I .flags = SDHCI_OMAP_REQUIRE_IODELAY, 7707d326930SKishon Vijay Abraham I }; 7717d326930SKishon Vijay Abraham I 7727d326930SKishon Vijay Abraham I static const struct of_device_id omap_sdhci_match[] = { 7737d326930SKishon Vijay Abraham I { .compatible = "ti,dra7-sdhci", .data = &dra7_data }, 7746d75df75SKishon Vijay Abraham I { .compatible = "ti,k2g-sdhci", .data = &k2g_data }, 7757d326930SKishon Vijay Abraham I {}, 7767d326930SKishon Vijay Abraham I }; 7777d326930SKishon Vijay Abraham I MODULE_DEVICE_TABLE(of, omap_sdhci_match); 7787d326930SKishon Vijay Abraham I 7798d20b2eaSKishon Vijay Abraham I static struct pinctrl_state 7808d20b2eaSKishon Vijay Abraham I *sdhci_omap_iodelay_pinctrl_state(struct sdhci_omap_host *omap_host, char *mode, 7818d20b2eaSKishon Vijay Abraham I u32 *caps, u32 capmask) 7828d20b2eaSKishon Vijay Abraham I { 7838d20b2eaSKishon Vijay Abraham I struct device *dev = omap_host->dev; 784212f4f8aSKishon Vijay Abraham I char *version = omap_host->version; 7858d20b2eaSKishon Vijay Abraham I struct pinctrl_state *pinctrl_state = ERR_PTR(-ENODEV); 786212f4f8aSKishon Vijay Abraham I char str[20]; 7878d20b2eaSKishon Vijay Abraham I 7888d20b2eaSKishon Vijay Abraham I if (!(*caps & capmask)) 7898d20b2eaSKishon Vijay Abraham I goto ret; 7908d20b2eaSKishon Vijay Abraham I 791212f4f8aSKishon Vijay Abraham I if (version) { 792212f4f8aSKishon Vijay Abraham I snprintf(str, 20, "%s-%s", mode, version); 793212f4f8aSKishon Vijay Abraham I pinctrl_state = pinctrl_lookup_state(omap_host->pinctrl, str); 794212f4f8aSKishon Vijay Abraham I } 795212f4f8aSKishon Vijay Abraham I 796212f4f8aSKishon Vijay Abraham I if (IS_ERR(pinctrl_state)) 7978d20b2eaSKishon Vijay Abraham I pinctrl_state = pinctrl_lookup_state(omap_host->pinctrl, mode); 798212f4f8aSKishon Vijay Abraham I 7998d20b2eaSKishon Vijay Abraham I if (IS_ERR(pinctrl_state)) { 8008d20b2eaSKishon Vijay Abraham I dev_err(dev, "no pinctrl state for %s mode", mode); 8018d20b2eaSKishon Vijay Abraham I *caps &= ~capmask; 8028d20b2eaSKishon Vijay Abraham I } 8038d20b2eaSKishon Vijay Abraham I 8048d20b2eaSKishon Vijay Abraham I ret: 8058d20b2eaSKishon Vijay Abraham I return pinctrl_state; 8068d20b2eaSKishon Vijay Abraham I } 8078d20b2eaSKishon Vijay Abraham I 8088d20b2eaSKishon Vijay Abraham I static int sdhci_omap_config_iodelay_pinctrl_state(struct sdhci_omap_host 8098d20b2eaSKishon Vijay Abraham I *omap_host) 8108d20b2eaSKishon Vijay Abraham I { 8118d20b2eaSKishon Vijay Abraham I struct device *dev = omap_host->dev; 8128d20b2eaSKishon Vijay Abraham I struct sdhci_host *host = omap_host->host; 8138d20b2eaSKishon Vijay Abraham I struct mmc_host *mmc = host->mmc; 8148d20b2eaSKishon Vijay Abraham I u32 *caps = &mmc->caps; 8158d20b2eaSKishon Vijay Abraham I u32 *caps2 = &mmc->caps2; 8168d20b2eaSKishon Vijay Abraham I struct pinctrl_state *state; 8178d20b2eaSKishon Vijay Abraham I struct pinctrl_state **pinctrl_state; 8188d20b2eaSKishon Vijay Abraham I 8198d20b2eaSKishon Vijay Abraham I if (!(omap_host->flags & SDHCI_OMAP_REQUIRE_IODELAY)) 8208d20b2eaSKishon Vijay Abraham I return 0; 8218d20b2eaSKishon Vijay Abraham I 822a86854d0SKees Cook pinctrl_state = devm_kcalloc(dev, 823a86854d0SKees Cook MMC_TIMING_MMC_HS200 + 1, 824a86854d0SKees Cook sizeof(*pinctrl_state), 825a86854d0SKees Cook GFP_KERNEL); 8268d20b2eaSKishon Vijay Abraham I if (!pinctrl_state) 8278d20b2eaSKishon Vijay Abraham I return -ENOMEM; 8288d20b2eaSKishon Vijay Abraham I 8298d20b2eaSKishon Vijay Abraham I omap_host->pinctrl = devm_pinctrl_get(omap_host->dev); 8308d20b2eaSKishon Vijay Abraham I if (IS_ERR(omap_host->pinctrl)) { 8318d20b2eaSKishon Vijay Abraham I dev_err(dev, "Cannot get pinctrl\n"); 8328d20b2eaSKishon Vijay Abraham I return PTR_ERR(omap_host->pinctrl); 8338d20b2eaSKishon Vijay Abraham I } 8348d20b2eaSKishon Vijay Abraham I 8358d20b2eaSKishon Vijay Abraham I state = pinctrl_lookup_state(omap_host->pinctrl, "default"); 8368d20b2eaSKishon Vijay Abraham I if (IS_ERR(state)) { 8378d20b2eaSKishon Vijay Abraham I dev_err(dev, "no pinctrl state for default mode\n"); 8388d20b2eaSKishon Vijay Abraham I return PTR_ERR(state); 8398d20b2eaSKishon Vijay Abraham I } 8408d20b2eaSKishon Vijay Abraham I pinctrl_state[MMC_TIMING_LEGACY] = state; 8418d20b2eaSKishon Vijay Abraham I 8428d20b2eaSKishon Vijay Abraham I state = sdhci_omap_iodelay_pinctrl_state(omap_host, "sdr104", caps, 8438d20b2eaSKishon Vijay Abraham I MMC_CAP_UHS_SDR104); 8448d20b2eaSKishon Vijay Abraham I if (!IS_ERR(state)) 8458d20b2eaSKishon Vijay Abraham I pinctrl_state[MMC_TIMING_UHS_SDR104] = state; 8468d20b2eaSKishon Vijay Abraham I 8478d20b2eaSKishon Vijay Abraham I state = sdhci_omap_iodelay_pinctrl_state(omap_host, "ddr50", caps, 8488d20b2eaSKishon Vijay Abraham I MMC_CAP_UHS_DDR50); 8498d20b2eaSKishon Vijay Abraham I if (!IS_ERR(state)) 8508d20b2eaSKishon Vijay Abraham I pinctrl_state[MMC_TIMING_UHS_DDR50] = state; 8518d20b2eaSKishon Vijay Abraham I 8528d20b2eaSKishon Vijay Abraham I state = sdhci_omap_iodelay_pinctrl_state(omap_host, "sdr50", caps, 8538d20b2eaSKishon Vijay Abraham I MMC_CAP_UHS_SDR50); 8548d20b2eaSKishon Vijay Abraham I if (!IS_ERR(state)) 8558d20b2eaSKishon Vijay Abraham I pinctrl_state[MMC_TIMING_UHS_SDR50] = state; 8568d20b2eaSKishon Vijay Abraham I 8578d20b2eaSKishon Vijay Abraham I state = sdhci_omap_iodelay_pinctrl_state(omap_host, "sdr25", caps, 8588d20b2eaSKishon Vijay Abraham I MMC_CAP_UHS_SDR25); 8598d20b2eaSKishon Vijay Abraham I if (!IS_ERR(state)) 8608d20b2eaSKishon Vijay Abraham I pinctrl_state[MMC_TIMING_UHS_SDR25] = state; 8618d20b2eaSKishon Vijay Abraham I 8628d20b2eaSKishon Vijay Abraham I state = sdhci_omap_iodelay_pinctrl_state(omap_host, "sdr12", caps, 8638d20b2eaSKishon Vijay Abraham I MMC_CAP_UHS_SDR12); 8648d20b2eaSKishon Vijay Abraham I if (!IS_ERR(state)) 8658d20b2eaSKishon Vijay Abraham I pinctrl_state[MMC_TIMING_UHS_SDR12] = state; 8668d20b2eaSKishon Vijay Abraham I 8678d20b2eaSKishon Vijay Abraham I state = sdhci_omap_iodelay_pinctrl_state(omap_host, "ddr_1_8v", caps, 8688d20b2eaSKishon Vijay Abraham I MMC_CAP_1_8V_DDR); 8693f402878SKishon Vijay Abraham I if (!IS_ERR(state)) { 8703f402878SKishon Vijay Abraham I pinctrl_state[MMC_TIMING_MMC_DDR52] = state; 8713f402878SKishon Vijay Abraham I } else { 8723f402878SKishon Vijay Abraham I state = sdhci_omap_iodelay_pinctrl_state(omap_host, "ddr_3_3v", 8733f402878SKishon Vijay Abraham I caps, 8743f402878SKishon Vijay Abraham I MMC_CAP_3_3V_DDR); 8758d20b2eaSKishon Vijay Abraham I if (!IS_ERR(state)) 8768d20b2eaSKishon Vijay Abraham I pinctrl_state[MMC_TIMING_MMC_DDR52] = state; 8773f402878SKishon Vijay Abraham I } 8788d20b2eaSKishon Vijay Abraham I 8798d20b2eaSKishon Vijay Abraham I state = sdhci_omap_iodelay_pinctrl_state(omap_host, "hs", caps, 8808d20b2eaSKishon Vijay Abraham I MMC_CAP_SD_HIGHSPEED); 8818d20b2eaSKishon Vijay Abraham I if (!IS_ERR(state)) 8828d20b2eaSKishon Vijay Abraham I pinctrl_state[MMC_TIMING_SD_HS] = state; 8838d20b2eaSKishon Vijay Abraham I 8848d20b2eaSKishon Vijay Abraham I state = sdhci_omap_iodelay_pinctrl_state(omap_host, "hs", caps, 8858d20b2eaSKishon Vijay Abraham I MMC_CAP_MMC_HIGHSPEED); 8868d20b2eaSKishon Vijay Abraham I if (!IS_ERR(state)) 8878d20b2eaSKishon Vijay Abraham I pinctrl_state[MMC_TIMING_MMC_HS] = state; 8888d20b2eaSKishon Vijay Abraham I 8898d20b2eaSKishon Vijay Abraham I state = sdhci_omap_iodelay_pinctrl_state(omap_host, "hs200_1_8v", caps2, 8908d20b2eaSKishon Vijay Abraham I MMC_CAP2_HS200_1_8V_SDR); 8918d20b2eaSKishon Vijay Abraham I if (!IS_ERR(state)) 8928d20b2eaSKishon Vijay Abraham I pinctrl_state[MMC_TIMING_MMC_HS200] = state; 8938d20b2eaSKishon Vijay Abraham I 8948d20b2eaSKishon Vijay Abraham I omap_host->pinctrl_state = pinctrl_state; 8958d20b2eaSKishon Vijay Abraham I 8968d20b2eaSKishon Vijay Abraham I return 0; 8978d20b2eaSKishon Vijay Abraham I } 8988d20b2eaSKishon Vijay Abraham I 899212f4f8aSKishon Vijay Abraham I static const struct soc_device_attribute sdhci_omap_soc_devices[] = { 900212f4f8aSKishon Vijay Abraham I { 901212f4f8aSKishon Vijay Abraham I .machine = "DRA7[45]*", 902212f4f8aSKishon Vijay Abraham I .revision = "ES1.[01]", 903212f4f8aSKishon Vijay Abraham I }, 904212f4f8aSKishon Vijay Abraham I { 905212f4f8aSKishon Vijay Abraham I /* sentinel */ 906212f4f8aSKishon Vijay Abraham I } 907212f4f8aSKishon Vijay Abraham I }; 908212f4f8aSKishon Vijay Abraham I 9097d326930SKishon Vijay Abraham I static int sdhci_omap_probe(struct platform_device *pdev) 9107d326930SKishon Vijay Abraham I { 9117d326930SKishon Vijay Abraham I int ret; 9127d326930SKishon Vijay Abraham I u32 offset; 9137d326930SKishon Vijay Abraham I struct device *dev = &pdev->dev; 9147d326930SKishon Vijay Abraham I struct sdhci_host *host; 9157d326930SKishon Vijay Abraham I struct sdhci_pltfm_host *pltfm_host; 9167d326930SKishon Vijay Abraham I struct sdhci_omap_host *omap_host; 9177d326930SKishon Vijay Abraham I struct mmc_host *mmc; 9187d326930SKishon Vijay Abraham I const struct of_device_id *match; 9197d326930SKishon Vijay Abraham I struct sdhci_omap_data *data; 920212f4f8aSKishon Vijay Abraham I const struct soc_device_attribute *soc; 9217d326930SKishon Vijay Abraham I 9227d326930SKishon Vijay Abraham I match = of_match_device(omap_sdhci_match, dev); 9237d326930SKishon Vijay Abraham I if (!match) 9247d326930SKishon Vijay Abraham I return -EINVAL; 9257d326930SKishon Vijay Abraham I 9267d326930SKishon Vijay Abraham I data = (struct sdhci_omap_data *)match->data; 9277d326930SKishon Vijay Abraham I if (!data) { 9287d326930SKishon Vijay Abraham I dev_err(dev, "no sdhci omap data\n"); 9297d326930SKishon Vijay Abraham I return -EINVAL; 9307d326930SKishon Vijay Abraham I } 9317d326930SKishon Vijay Abraham I offset = data->offset; 9327d326930SKishon Vijay Abraham I 9337d326930SKishon Vijay Abraham I host = sdhci_pltfm_init(pdev, &sdhci_omap_pdata, 9347d326930SKishon Vijay Abraham I sizeof(*omap_host)); 9357d326930SKishon Vijay Abraham I if (IS_ERR(host)) { 9367d326930SKishon Vijay Abraham I dev_err(dev, "Failed sdhci_pltfm_init\n"); 9377d326930SKishon Vijay Abraham I return PTR_ERR(host); 9387d326930SKishon Vijay Abraham I } 9397d326930SKishon Vijay Abraham I 9407d326930SKishon Vijay Abraham I pltfm_host = sdhci_priv(host); 9417d326930SKishon Vijay Abraham I omap_host = sdhci_pltfm_priv(pltfm_host); 9427d326930SKishon Vijay Abraham I omap_host->host = host; 9437d326930SKishon Vijay Abraham I omap_host->base = host->ioaddr; 9447d326930SKishon Vijay Abraham I omap_host->dev = dev; 945300df508SKishon Vijay Abraham I omap_host->power_mode = MMC_POWER_UNDEFINED; 9468d20b2eaSKishon Vijay Abraham I omap_host->timing = MMC_TIMING_LEGACY; 9478d20b2eaSKishon Vijay Abraham I omap_host->flags = data->flags; 9487d326930SKishon Vijay Abraham I host->ioaddr += offset; 9497d326930SKishon Vijay Abraham I 9507d326930SKishon Vijay Abraham I mmc = host->mmc; 9511d3a2220SKishon Vijay Abraham I sdhci_get_of_property(pdev); 9527d326930SKishon Vijay Abraham I ret = mmc_of_parse(mmc); 9537d326930SKishon Vijay Abraham I if (ret) 9547d326930SKishon Vijay Abraham I goto err_pltfm_free; 9557d326930SKishon Vijay Abraham I 956212f4f8aSKishon Vijay Abraham I soc = soc_device_match(sdhci_omap_soc_devices); 957212f4f8aSKishon Vijay Abraham I if (soc) { 958212f4f8aSKishon Vijay Abraham I omap_host->version = "rev11"; 959212f4f8aSKishon Vijay Abraham I if (!strcmp(dev_name(dev), "4809c000.mmc")) 960212f4f8aSKishon Vijay Abraham I mmc->f_max = 96000000; 961212f4f8aSKishon Vijay Abraham I if (!strcmp(dev_name(dev), "480b4000.mmc")) 962212f4f8aSKishon Vijay Abraham I mmc->f_max = 48000000; 963212f4f8aSKishon Vijay Abraham I if (!strcmp(dev_name(dev), "480ad000.mmc")) 964212f4f8aSKishon Vijay Abraham I mmc->f_max = 48000000; 965212f4f8aSKishon Vijay Abraham I } 966212f4f8aSKishon Vijay Abraham I 9677d326930SKishon Vijay Abraham I pltfm_host->clk = devm_clk_get(dev, "fck"); 9687d326930SKishon Vijay Abraham I if (IS_ERR(pltfm_host->clk)) { 9697d326930SKishon Vijay Abraham I ret = PTR_ERR(pltfm_host->clk); 9707d326930SKishon Vijay Abraham I goto err_pltfm_free; 9717d326930SKishon Vijay Abraham I } 9727d326930SKishon Vijay Abraham I 9737d326930SKishon Vijay Abraham I ret = clk_set_rate(pltfm_host->clk, mmc->f_max); 9747d326930SKishon Vijay Abraham I if (ret) { 9757d326930SKishon Vijay Abraham I dev_err(dev, "failed to set clock to %d\n", mmc->f_max); 9767d326930SKishon Vijay Abraham I goto err_pltfm_free; 9777d326930SKishon Vijay Abraham I } 9787d326930SKishon Vijay Abraham I 9797d326930SKishon Vijay Abraham I omap_host->pbias = devm_regulator_get_optional(dev, "pbias"); 9807d326930SKishon Vijay Abraham I if (IS_ERR(omap_host->pbias)) { 9817d326930SKishon Vijay Abraham I ret = PTR_ERR(omap_host->pbias); 9827d326930SKishon Vijay Abraham I if (ret != -ENODEV) 9837d326930SKishon Vijay Abraham I goto err_pltfm_free; 9847d326930SKishon Vijay Abraham I dev_dbg(dev, "unable to get pbias regulator %d\n", ret); 9857d326930SKishon Vijay Abraham I } 9867d326930SKishon Vijay Abraham I omap_host->pbias_enabled = false; 9877d326930SKishon Vijay Abraham I 9887d326930SKishon Vijay Abraham I /* 9897d326930SKishon Vijay Abraham I * omap_device_pm_domain has callbacks to enable the main 9907d326930SKishon Vijay Abraham I * functional clock, interface clock and also configure the 9917d326930SKishon Vijay Abraham I * SYSCONFIG register of omap devices. The callback will be invoked 9927d326930SKishon Vijay Abraham I * as part of pm_runtime_get_sync. 9937d326930SKishon Vijay Abraham I */ 9947d326930SKishon Vijay Abraham I pm_runtime_enable(dev); 9957d326930SKishon Vijay Abraham I ret = pm_runtime_get_sync(dev); 9967d326930SKishon Vijay Abraham I if (ret < 0) { 9977d326930SKishon Vijay Abraham I dev_err(dev, "pm_runtime_get_sync failed\n"); 9987d326930SKishon Vijay Abraham I pm_runtime_put_noidle(dev); 9997d326930SKishon Vijay Abraham I goto err_rpm_disable; 10007d326930SKishon Vijay Abraham I } 10017d326930SKishon Vijay Abraham I 10027d326930SKishon Vijay Abraham I ret = sdhci_omap_set_capabilities(omap_host); 10037d326930SKishon Vijay Abraham I if (ret) { 10047d326930SKishon Vijay Abraham I dev_err(dev, "failed to set system capabilities\n"); 10057d326930SKishon Vijay Abraham I goto err_put_sync; 10067d326930SKishon Vijay Abraham I } 10077d326930SKishon Vijay Abraham I 10087d326930SKishon Vijay Abraham I host->mmc_host_ops.get_ro = mmc_gpio_get_ro; 10097d326930SKishon Vijay Abraham I host->mmc_host_ops.start_signal_voltage_switch = 10107d326930SKishon Vijay Abraham I sdhci_omap_start_signal_voltage_switch; 10117d326930SKishon Vijay Abraham I host->mmc_host_ops.set_ios = sdhci_omap_set_ios; 101220ea26a1SKishon Vijay Abraham I host->mmc_host_ops.card_busy = sdhci_omap_card_busy; 10139fc2cd76SKishon Vijay Abraham I host->mmc_host_ops.execute_tuning = sdhci_omap_execute_tuning; 1014efde12b2SKishon Vijay Abraham I host->mmc_host_ops.enable_sdio_irq = sdhci_omap_enable_sdio_irq; 10157d326930SKishon Vijay Abraham I 10160ec4ee3cSKishon Vijay Abraham I ret = sdhci_setup_host(host); 10177d326930SKishon Vijay Abraham I if (ret) 10187d326930SKishon Vijay Abraham I goto err_put_sync; 10197d326930SKishon Vijay Abraham I 10200ec4ee3cSKishon Vijay Abraham I ret = sdhci_omap_config_iodelay_pinctrl_state(omap_host); 10210ec4ee3cSKishon Vijay Abraham I if (ret) 10220ec4ee3cSKishon Vijay Abraham I goto err_cleanup_host; 10230ec4ee3cSKishon Vijay Abraham I 10240ec4ee3cSKishon Vijay Abraham I ret = __sdhci_add_host(host); 10250ec4ee3cSKishon Vijay Abraham I if (ret) 10260ec4ee3cSKishon Vijay Abraham I goto err_cleanup_host; 10270ec4ee3cSKishon Vijay Abraham I 10287d326930SKishon Vijay Abraham I return 0; 10297d326930SKishon Vijay Abraham I 10300ec4ee3cSKishon Vijay Abraham I err_cleanup_host: 10310ec4ee3cSKishon Vijay Abraham I sdhci_cleanup_host(host); 10320ec4ee3cSKishon Vijay Abraham I 10337d326930SKishon Vijay Abraham I err_put_sync: 10347d326930SKishon Vijay Abraham I pm_runtime_put_sync(dev); 10357d326930SKishon Vijay Abraham I 10367d326930SKishon Vijay Abraham I err_rpm_disable: 10377d326930SKishon Vijay Abraham I pm_runtime_disable(dev); 10387d326930SKishon Vijay Abraham I 10397d326930SKishon Vijay Abraham I err_pltfm_free: 10407d326930SKishon Vijay Abraham I sdhci_pltfm_free(pdev); 10417d326930SKishon Vijay Abraham I return ret; 10427d326930SKishon Vijay Abraham I } 10437d326930SKishon Vijay Abraham I 10447d326930SKishon Vijay Abraham I static int sdhci_omap_remove(struct platform_device *pdev) 10457d326930SKishon Vijay Abraham I { 10467d326930SKishon Vijay Abraham I struct device *dev = &pdev->dev; 10477d326930SKishon Vijay Abraham I struct sdhci_host *host = platform_get_drvdata(pdev); 10487d326930SKishon Vijay Abraham I 10497d326930SKishon Vijay Abraham I sdhci_remove_host(host, true); 10507d326930SKishon Vijay Abraham I pm_runtime_put_sync(dev); 10517d326930SKishon Vijay Abraham I pm_runtime_disable(dev); 10527d326930SKishon Vijay Abraham I sdhci_pltfm_free(pdev); 10537d326930SKishon Vijay Abraham I 10547d326930SKishon Vijay Abraham I return 0; 10557d326930SKishon Vijay Abraham I } 10567d326930SKishon Vijay Abraham I 10577d326930SKishon Vijay Abraham I static struct platform_driver sdhci_omap_driver = { 10587d326930SKishon Vijay Abraham I .probe = sdhci_omap_probe, 10597d326930SKishon Vijay Abraham I .remove = sdhci_omap_remove, 10607d326930SKishon Vijay Abraham I .driver = { 10617d326930SKishon Vijay Abraham I .name = "sdhci-omap", 10627d326930SKishon Vijay Abraham I .of_match_table = omap_sdhci_match, 10637d326930SKishon Vijay Abraham I }, 10647d326930SKishon Vijay Abraham I }; 10657d326930SKishon Vijay Abraham I 10667d326930SKishon Vijay Abraham I module_platform_driver(sdhci_omap_driver); 10677d326930SKishon Vijay Abraham I 10687d326930SKishon Vijay Abraham I MODULE_DESCRIPTION("SDHCI driver for OMAP SoCs"); 10697d326930SKishon Vijay Abraham I MODULE_AUTHOR("Texas Instruments Inc."); 10707d326930SKishon Vijay Abraham I MODULE_LICENSE("GPL v2"); 10717d326930SKishon Vijay Abraham I MODULE_ALIAS("platform:sdhci_omap"); 1072