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> 30961de0a8SFaiz Abbas #include <linux/thermal.h> 317d326930SKishon Vijay Abraham I 327d326930SKishon Vijay Abraham I #include "sdhci-pltfm.h" 337d326930SKishon Vijay Abraham I 347d326930SKishon Vijay Abraham I #define SDHCI_OMAP_CON 0x12c 357d326930SKishon Vijay Abraham I #define CON_DW8 BIT(5) 367d326930SKishon Vijay Abraham I #define CON_DMA_MASTER BIT(20) 3727ceb7e0SKishon Vijay Abraham I #define CON_DDR BIT(19) 3820ea26a1SKishon Vijay Abraham I #define CON_CLKEXTFREE BIT(16) 3920ea26a1SKishon Vijay Abraham I #define CON_PADEN BIT(15) 40efde12b2SKishon Vijay Abraham I #define CON_CTPL BIT(11) 417d326930SKishon Vijay Abraham I #define CON_INIT BIT(1) 427d326930SKishon Vijay Abraham I #define CON_OD BIT(0) 437d326930SKishon Vijay Abraham I 449fc2cd76SKishon Vijay Abraham I #define SDHCI_OMAP_DLL 0x0134 459fc2cd76SKishon Vijay Abraham I #define DLL_SWT BIT(20) 469fc2cd76SKishon Vijay Abraham I #define DLL_FORCE_SR_C_SHIFT 13 479fc2cd76SKishon Vijay Abraham I #define DLL_FORCE_SR_C_MASK (0x7f << DLL_FORCE_SR_C_SHIFT) 489fc2cd76SKishon Vijay Abraham I #define DLL_FORCE_VALUE BIT(12) 499fc2cd76SKishon Vijay Abraham I #define DLL_CALIB BIT(1) 509fc2cd76SKishon Vijay Abraham I 517d326930SKishon Vijay Abraham I #define SDHCI_OMAP_CMD 0x20c 527d326930SKishon Vijay Abraham I 5320ea26a1SKishon Vijay Abraham I #define SDHCI_OMAP_PSTATE 0x0224 5420ea26a1SKishon Vijay Abraham I #define PSTATE_DLEV_DAT0 BIT(20) 5520ea26a1SKishon Vijay Abraham I #define PSTATE_DATI BIT(1) 5620ea26a1SKishon Vijay Abraham I 577d326930SKishon Vijay Abraham I #define SDHCI_OMAP_HCTL 0x228 587d326930SKishon Vijay Abraham I #define HCTL_SDBP BIT(8) 597d326930SKishon Vijay Abraham I #define HCTL_SDVS_SHIFT 9 607d326930SKishon Vijay Abraham I #define HCTL_SDVS_MASK (0x7 << HCTL_SDVS_SHIFT) 617d326930SKishon Vijay Abraham I #define HCTL_SDVS_33 (0x7 << HCTL_SDVS_SHIFT) 627d326930SKishon Vijay Abraham I #define HCTL_SDVS_30 (0x6 << HCTL_SDVS_SHIFT) 637d326930SKishon Vijay Abraham I #define HCTL_SDVS_18 (0x5 << HCTL_SDVS_SHIFT) 647d326930SKishon Vijay Abraham I 657d326930SKishon Vijay Abraham I #define SDHCI_OMAP_SYSCTL 0x22c 667d326930SKishon Vijay Abraham I #define SYSCTL_CEN BIT(2) 677d326930SKishon Vijay Abraham I #define SYSCTL_CLKD_SHIFT 6 687d326930SKishon Vijay Abraham I #define SYSCTL_CLKD_MASK 0x3ff 697d326930SKishon Vijay Abraham I 707d326930SKishon Vijay Abraham I #define SDHCI_OMAP_STAT 0x230 717d326930SKishon Vijay Abraham I 727d326930SKishon Vijay Abraham I #define SDHCI_OMAP_IE 0x234 737d326930SKishon Vijay Abraham I #define INT_CC_EN BIT(0) 747d326930SKishon Vijay Abraham I 757d326930SKishon Vijay Abraham I #define SDHCI_OMAP_AC12 0x23c 767d326930SKishon Vijay Abraham I #define AC12_V1V8_SIGEN BIT(19) 779fc2cd76SKishon Vijay Abraham I #define AC12_SCLK_SEL BIT(23) 787d326930SKishon Vijay Abraham I 797d326930SKishon Vijay Abraham I #define SDHCI_OMAP_CAPA 0x240 807d326930SKishon Vijay Abraham I #define CAPA_VS33 BIT(24) 817d326930SKishon Vijay Abraham I #define CAPA_VS30 BIT(25) 827d326930SKishon Vijay Abraham I #define CAPA_VS18 BIT(26) 837d326930SKishon Vijay Abraham I 849fc2cd76SKishon Vijay Abraham I #define SDHCI_OMAP_CAPA2 0x0244 859fc2cd76SKishon Vijay Abraham I #define CAPA2_TSDR50 BIT(13) 869fc2cd76SKishon Vijay Abraham I 877d326930SKishon Vijay Abraham I #define SDHCI_OMAP_TIMEOUT 1 /* 1 msec */ 887d326930SKishon Vijay Abraham I 897d326930SKishon Vijay Abraham I #define SYSCTL_CLKD_MAX 0x3FF 907d326930SKishon Vijay Abraham I 917d326930SKishon Vijay Abraham I #define IOV_1V8 1800000 /* 180000 uV */ 927d326930SKishon Vijay Abraham I #define IOV_3V0 3000000 /* 300000 uV */ 937d326930SKishon Vijay Abraham I #define IOV_3V3 3300000 /* 330000 uV */ 947d326930SKishon Vijay Abraham I 959fc2cd76SKishon Vijay Abraham I #define MAX_PHASE_DELAY 0x7C 969fc2cd76SKishon Vijay Abraham I 978d20b2eaSKishon Vijay Abraham I /* sdhci-omap controller flags */ 988d20b2eaSKishon Vijay Abraham I #define SDHCI_OMAP_REQUIRE_IODELAY BIT(0) 998d20b2eaSKishon Vijay Abraham I 1007d326930SKishon Vijay Abraham I struct sdhci_omap_data { 1017d326930SKishon Vijay Abraham I u32 offset; 1028d20b2eaSKishon Vijay Abraham I u8 flags; 1037d326930SKishon Vijay Abraham I }; 1047d326930SKishon Vijay Abraham I 1057d326930SKishon Vijay Abraham I struct sdhci_omap_host { 106212f4f8aSKishon Vijay Abraham I char *version; 1077d326930SKishon Vijay Abraham I void __iomem *base; 1087d326930SKishon Vijay Abraham I struct device *dev; 1097d326930SKishon Vijay Abraham I struct regulator *pbias; 1107d326930SKishon Vijay Abraham I bool pbias_enabled; 1117d326930SKishon Vijay Abraham I struct sdhci_host *host; 1127d326930SKishon Vijay Abraham I u8 bus_mode; 1137d326930SKishon Vijay Abraham I u8 power_mode; 1148d20b2eaSKishon Vijay Abraham I u8 timing; 1158d20b2eaSKishon Vijay Abraham I u8 flags; 1168d20b2eaSKishon Vijay Abraham I 1178d20b2eaSKishon Vijay Abraham I struct pinctrl *pinctrl; 1188d20b2eaSKishon Vijay Abraham I struct pinctrl_state **pinctrl_state; 1195b0d6210SFaiz Abbas bool is_tuning; 1207d326930SKishon Vijay Abraham I }; 1217d326930SKishon Vijay Abraham I 1228d20b2eaSKishon Vijay Abraham I static void sdhci_omap_start_clock(struct sdhci_omap_host *omap_host); 1238d20b2eaSKishon Vijay Abraham I static void sdhci_omap_stop_clock(struct sdhci_omap_host *omap_host); 1248d20b2eaSKishon Vijay Abraham I 1257d326930SKishon Vijay Abraham I static inline u32 sdhci_omap_readl(struct sdhci_omap_host *host, 1267d326930SKishon Vijay Abraham I unsigned int offset) 1277d326930SKishon Vijay Abraham I { 1287d326930SKishon Vijay Abraham I return readl(host->base + offset); 1297d326930SKishon Vijay Abraham I } 1307d326930SKishon Vijay Abraham I 1317d326930SKishon Vijay Abraham I static inline void sdhci_omap_writel(struct sdhci_omap_host *host, 1327d326930SKishon Vijay Abraham I unsigned int offset, u32 data) 1337d326930SKishon Vijay Abraham I { 1347d326930SKishon Vijay Abraham I writel(data, host->base + offset); 1357d326930SKishon Vijay Abraham I } 1367d326930SKishon Vijay Abraham I 1377d326930SKishon Vijay Abraham I static int sdhci_omap_set_pbias(struct sdhci_omap_host *omap_host, 1387d326930SKishon Vijay Abraham I bool power_on, unsigned int iov) 1397d326930SKishon Vijay Abraham I { 1407d326930SKishon Vijay Abraham I int ret; 1417d326930SKishon Vijay Abraham I struct device *dev = omap_host->dev; 1427d326930SKishon Vijay Abraham I 1437d326930SKishon Vijay Abraham I if (IS_ERR(omap_host->pbias)) 1447d326930SKishon Vijay Abraham I return 0; 1457d326930SKishon Vijay Abraham I 1467d326930SKishon Vijay Abraham I if (power_on) { 1477d326930SKishon Vijay Abraham I ret = regulator_set_voltage(omap_host->pbias, iov, iov); 1487d326930SKishon Vijay Abraham I if (ret) { 1497d326930SKishon Vijay Abraham I dev_err(dev, "pbias set voltage failed\n"); 1507d326930SKishon Vijay Abraham I return ret; 1517d326930SKishon Vijay Abraham I } 1527d326930SKishon Vijay Abraham I 1537d326930SKishon Vijay Abraham I if (omap_host->pbias_enabled) 1547d326930SKishon Vijay Abraham I return 0; 1557d326930SKishon Vijay Abraham I 1567d326930SKishon Vijay Abraham I ret = regulator_enable(omap_host->pbias); 1577d326930SKishon Vijay Abraham I if (ret) { 1587d326930SKishon Vijay Abraham I dev_err(dev, "pbias reg enable fail\n"); 1597d326930SKishon Vijay Abraham I return ret; 1607d326930SKishon Vijay Abraham I } 1617d326930SKishon Vijay Abraham I 1627d326930SKishon Vijay Abraham I omap_host->pbias_enabled = true; 1637d326930SKishon Vijay Abraham I } else { 1647d326930SKishon Vijay Abraham I if (!omap_host->pbias_enabled) 1657d326930SKishon Vijay Abraham I return 0; 1667d326930SKishon Vijay Abraham I 1677d326930SKishon Vijay Abraham I ret = regulator_disable(omap_host->pbias); 1687d326930SKishon Vijay Abraham I if (ret) { 1697d326930SKishon Vijay Abraham I dev_err(dev, "pbias reg disable fail\n"); 1707d326930SKishon Vijay Abraham I return ret; 1717d326930SKishon Vijay Abraham I } 1727d326930SKishon Vijay Abraham I omap_host->pbias_enabled = false; 1737d326930SKishon Vijay Abraham I } 1747d326930SKishon Vijay Abraham I 1757d326930SKishon Vijay Abraham I return 0; 1767d326930SKishon Vijay Abraham I } 1777d326930SKishon Vijay Abraham I 1787d326930SKishon Vijay Abraham I static int sdhci_omap_enable_iov(struct sdhci_omap_host *omap_host, 1797d326930SKishon Vijay Abraham I unsigned int iov) 1807d326930SKishon Vijay Abraham I { 1817d326930SKishon Vijay Abraham I int ret; 1827d326930SKishon Vijay Abraham I struct sdhci_host *host = omap_host->host; 1837d326930SKishon Vijay Abraham I struct mmc_host *mmc = host->mmc; 1847d326930SKishon Vijay Abraham I 1857d326930SKishon Vijay Abraham I ret = sdhci_omap_set_pbias(omap_host, false, 0); 1867d326930SKishon Vijay Abraham I if (ret) 1877d326930SKishon Vijay Abraham I return ret; 1887d326930SKishon Vijay Abraham I 1897d326930SKishon Vijay Abraham I if (!IS_ERR(mmc->supply.vqmmc)) { 1907d326930SKishon Vijay Abraham I ret = regulator_set_voltage(mmc->supply.vqmmc, iov, iov); 1917d326930SKishon Vijay Abraham I if (ret) { 1927d326930SKishon Vijay Abraham I dev_err(mmc_dev(mmc), "vqmmc set voltage failed\n"); 1937d326930SKishon Vijay Abraham I return ret; 1947d326930SKishon Vijay Abraham I } 1957d326930SKishon Vijay Abraham I } 1967d326930SKishon Vijay Abraham I 1977d326930SKishon Vijay Abraham I ret = sdhci_omap_set_pbias(omap_host, true, iov); 1987d326930SKishon Vijay Abraham I if (ret) 1997d326930SKishon Vijay Abraham I return ret; 2007d326930SKishon Vijay Abraham I 2017d326930SKishon Vijay Abraham I return 0; 2027d326930SKishon Vijay Abraham I } 2037d326930SKishon Vijay Abraham I 2047d326930SKishon Vijay Abraham I static void sdhci_omap_conf_bus_power(struct sdhci_omap_host *omap_host, 2057d326930SKishon Vijay Abraham I unsigned char signal_voltage) 2067d326930SKishon Vijay Abraham I { 2077d326930SKishon Vijay Abraham I u32 reg; 2087d326930SKishon Vijay Abraham I ktime_t timeout; 2097d326930SKishon Vijay Abraham I 2107d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_HCTL); 2117d326930SKishon Vijay Abraham I reg &= ~HCTL_SDVS_MASK; 2127d326930SKishon Vijay Abraham I 2137d326930SKishon Vijay Abraham I if (signal_voltage == MMC_SIGNAL_VOLTAGE_330) 2147d326930SKishon Vijay Abraham I reg |= HCTL_SDVS_33; 2157d326930SKishon Vijay Abraham I else 2167d326930SKishon Vijay Abraham I reg |= HCTL_SDVS_18; 2177d326930SKishon Vijay Abraham I 2187d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_HCTL, reg); 2197d326930SKishon Vijay Abraham I 2207d326930SKishon Vijay Abraham I reg |= HCTL_SDBP; 2217d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_HCTL, reg); 2227d326930SKishon Vijay Abraham I 2237d326930SKishon Vijay Abraham I /* wait 1ms */ 2247d326930SKishon Vijay Abraham I timeout = ktime_add_ms(ktime_get(), SDHCI_OMAP_TIMEOUT); 2259f0ea0bdSAdrian Hunter while (1) { 2269f0ea0bdSAdrian Hunter bool timedout = ktime_after(ktime_get(), timeout); 2279f0ea0bdSAdrian Hunter 2289f0ea0bdSAdrian Hunter if (sdhci_omap_readl(omap_host, SDHCI_OMAP_HCTL) & HCTL_SDBP) 2299f0ea0bdSAdrian Hunter break; 2309f0ea0bdSAdrian Hunter if (WARN_ON(timedout)) 2317d326930SKishon Vijay Abraham I return; 2327d326930SKishon Vijay Abraham I usleep_range(5, 10); 2337d326930SKishon Vijay Abraham I } 2347d326930SKishon Vijay Abraham I } 2357d326930SKishon Vijay Abraham I 236efde12b2SKishon Vijay Abraham I static void sdhci_omap_enable_sdio_irq(struct mmc_host *mmc, int enable) 237efde12b2SKishon Vijay Abraham I { 238efde12b2SKishon Vijay Abraham I struct sdhci_host *host = mmc_priv(mmc); 239efde12b2SKishon Vijay Abraham I struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 240efde12b2SKishon Vijay Abraham I struct sdhci_omap_host *omap_host = sdhci_pltfm_priv(pltfm_host); 241efde12b2SKishon Vijay Abraham I u32 reg; 242efde12b2SKishon Vijay Abraham I 243efde12b2SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CON); 244efde12b2SKishon Vijay Abraham I if (enable) 245efde12b2SKishon Vijay Abraham I reg |= (CON_CTPL | CON_CLKEXTFREE); 246efde12b2SKishon Vijay Abraham I else 247efde12b2SKishon Vijay Abraham I reg &= ~(CON_CTPL | CON_CLKEXTFREE); 248efde12b2SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_CON, reg); 249efde12b2SKishon Vijay Abraham I 250efde12b2SKishon Vijay Abraham I sdhci_enable_sdio_irq(mmc, enable); 251efde12b2SKishon Vijay Abraham I } 252efde12b2SKishon Vijay Abraham I 2539fc2cd76SKishon Vijay Abraham I static inline void sdhci_omap_set_dll(struct sdhci_omap_host *omap_host, 2549fc2cd76SKishon Vijay Abraham I int count) 2559fc2cd76SKishon Vijay Abraham I { 2569fc2cd76SKishon Vijay Abraham I int i; 2579fc2cd76SKishon Vijay Abraham I u32 reg; 2589fc2cd76SKishon Vijay Abraham I 2599fc2cd76SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_DLL); 2609fc2cd76SKishon Vijay Abraham I reg |= DLL_FORCE_VALUE; 2619fc2cd76SKishon Vijay Abraham I reg &= ~DLL_FORCE_SR_C_MASK; 2629fc2cd76SKishon Vijay Abraham I reg |= (count << DLL_FORCE_SR_C_SHIFT); 2639fc2cd76SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_DLL, reg); 2649fc2cd76SKishon Vijay Abraham I 2659fc2cd76SKishon Vijay Abraham I reg |= DLL_CALIB; 2669fc2cd76SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_DLL, reg); 2679fc2cd76SKishon Vijay Abraham I for (i = 0; i < 1000; i++) { 2689fc2cd76SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_DLL); 2699fc2cd76SKishon Vijay Abraham I if (reg & DLL_CALIB) 2709fc2cd76SKishon Vijay Abraham I break; 2719fc2cd76SKishon Vijay Abraham I } 2729fc2cd76SKishon Vijay Abraham I reg &= ~DLL_CALIB; 2739fc2cd76SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_DLL, reg); 2749fc2cd76SKishon Vijay Abraham I } 2759fc2cd76SKishon Vijay Abraham I 2769fc2cd76SKishon Vijay Abraham I static void sdhci_omap_disable_tuning(struct sdhci_omap_host *omap_host) 2779fc2cd76SKishon Vijay Abraham I { 2789fc2cd76SKishon Vijay Abraham I u32 reg; 2799fc2cd76SKishon Vijay Abraham I 2809fc2cd76SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_AC12); 2819fc2cd76SKishon Vijay Abraham I reg &= ~AC12_SCLK_SEL; 2829fc2cd76SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_AC12, reg); 2839fc2cd76SKishon Vijay Abraham I 2849fc2cd76SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_DLL); 2859fc2cd76SKishon Vijay Abraham I reg &= ~(DLL_FORCE_VALUE | DLL_SWT); 2869fc2cd76SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_DLL, reg); 2879fc2cd76SKishon Vijay Abraham I } 2889fc2cd76SKishon Vijay Abraham I 2899fc2cd76SKishon Vijay Abraham I static int sdhci_omap_execute_tuning(struct mmc_host *mmc, u32 opcode) 2909fc2cd76SKishon Vijay Abraham I { 2919fc2cd76SKishon Vijay Abraham I struct sdhci_host *host = mmc_priv(mmc); 2929fc2cd76SKishon Vijay Abraham I struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 2939fc2cd76SKishon Vijay Abraham I struct sdhci_omap_host *omap_host = sdhci_pltfm_priv(pltfm_host); 294961de0a8SFaiz Abbas struct thermal_zone_device *thermal_dev; 2959fc2cd76SKishon Vijay Abraham I struct device *dev = omap_host->dev; 2969fc2cd76SKishon Vijay Abraham I struct mmc_ios *ios = &mmc->ios; 2979fc2cd76SKishon Vijay Abraham I u32 start_window = 0, max_window = 0; 298961de0a8SFaiz Abbas bool single_point_failure = false; 299db2039fcSFaiz Abbas bool dcrc_was_enabled = false; 3009fc2cd76SKishon Vijay Abraham I u8 cur_match, prev_match = 0; 3019fc2cd76SKishon Vijay Abraham I u32 length = 0, max_len = 0; 3029fc2cd76SKishon Vijay Abraham I u32 phase_delay = 0; 303961de0a8SFaiz Abbas int temperature; 3049fc2cd76SKishon Vijay Abraham I int ret = 0; 3059fc2cd76SKishon Vijay Abraham I u32 reg; 306961de0a8SFaiz Abbas int i; 3079fc2cd76SKishon Vijay Abraham I 3089fc2cd76SKishon Vijay Abraham I /* clock tuning is not needed for upto 52MHz */ 3099fc2cd76SKishon Vijay Abraham I if (ios->clock <= 52000000) 3109fc2cd76SKishon Vijay Abraham I return 0; 3119fc2cd76SKishon Vijay Abraham I 3129fc2cd76SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CAPA2); 3139fc2cd76SKishon Vijay Abraham I if (ios->timing == MMC_TIMING_UHS_SDR50 && !(reg & CAPA2_TSDR50)) 3149fc2cd76SKishon Vijay Abraham I return 0; 3159fc2cd76SKishon Vijay Abraham I 316961de0a8SFaiz Abbas thermal_dev = thermal_zone_get_zone_by_name("cpu_thermal"); 317961de0a8SFaiz Abbas if (IS_ERR(thermal_dev)) { 318961de0a8SFaiz Abbas dev_err(dev, "Unable to get thermal zone for tuning\n"); 319961de0a8SFaiz Abbas return PTR_ERR(thermal_dev); 320961de0a8SFaiz Abbas } 321961de0a8SFaiz Abbas 322961de0a8SFaiz Abbas ret = thermal_zone_get_temp(thermal_dev, &temperature); 323961de0a8SFaiz Abbas if (ret) 324961de0a8SFaiz Abbas return ret; 325961de0a8SFaiz Abbas 3269fc2cd76SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_DLL); 3279fc2cd76SKishon Vijay Abraham I reg |= DLL_SWT; 3289fc2cd76SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_DLL, reg); 3299fc2cd76SKishon Vijay Abraham I 3307d33c358SKishon Vijay Abraham I /* 3317d33c358SKishon Vijay Abraham I * OMAP5/DRA74X/DRA72x Errata i802: 3327d33c358SKishon Vijay Abraham I * DCRC error interrupts (MMCHS_STAT[21] DCRC=0x1) can occur 3337d33c358SKishon Vijay Abraham I * during the tuning procedure. So disable it during the 3347d33c358SKishon Vijay Abraham I * tuning procedure. 3357d33c358SKishon Vijay Abraham I */ 336db2039fcSFaiz Abbas if (host->ier & SDHCI_INT_DATA_CRC) { 337db2039fcSFaiz Abbas host->ier &= ~SDHCI_INT_DATA_CRC; 338db2039fcSFaiz Abbas dcrc_was_enabled = true; 339db2039fcSFaiz Abbas } 3407d33c358SKishon Vijay Abraham I 3415b0d6210SFaiz Abbas omap_host->is_tuning = true; 3425b0d6210SFaiz Abbas 343961de0a8SFaiz Abbas /* 344961de0a8SFaiz Abbas * Stage 1: Search for a maximum pass window ignoring any 345961de0a8SFaiz Abbas * any single point failures. If the tuning value ends up 346961de0a8SFaiz Abbas * near it, move away from it in stage 2 below 347961de0a8SFaiz Abbas */ 3489fc2cd76SKishon Vijay Abraham I while (phase_delay <= MAX_PHASE_DELAY) { 3499fc2cd76SKishon Vijay Abraham I sdhci_omap_set_dll(omap_host, phase_delay); 3509fc2cd76SKishon Vijay Abraham I 3519fc2cd76SKishon Vijay Abraham I cur_match = !mmc_send_tuning(mmc, opcode, NULL); 3529fc2cd76SKishon Vijay Abraham I if (cur_match) { 3539fc2cd76SKishon Vijay Abraham I if (prev_match) { 3549fc2cd76SKishon Vijay Abraham I length++; 355961de0a8SFaiz Abbas } else if (single_point_failure) { 356961de0a8SFaiz Abbas /* ignore single point failure */ 357961de0a8SFaiz Abbas length++; 3589fc2cd76SKishon Vijay Abraham I } else { 3599fc2cd76SKishon Vijay Abraham I start_window = phase_delay; 3609fc2cd76SKishon Vijay Abraham I length = 1; 3619fc2cd76SKishon Vijay Abraham I } 362961de0a8SFaiz Abbas } else { 363961de0a8SFaiz Abbas single_point_failure = prev_match; 3649fc2cd76SKishon Vijay Abraham I } 3659fc2cd76SKishon Vijay Abraham I 3669fc2cd76SKishon Vijay Abraham I if (length > max_len) { 3679fc2cd76SKishon Vijay Abraham I max_window = start_window; 3689fc2cd76SKishon Vijay Abraham I max_len = length; 3699fc2cd76SKishon Vijay Abraham I } 3709fc2cd76SKishon Vijay Abraham I 3719fc2cd76SKishon Vijay Abraham I prev_match = cur_match; 3729fc2cd76SKishon Vijay Abraham I phase_delay += 4; 3739fc2cd76SKishon Vijay Abraham I } 3749fc2cd76SKishon Vijay Abraham I 3759fc2cd76SKishon Vijay Abraham I if (!max_len) { 3769fc2cd76SKishon Vijay Abraham I dev_err(dev, "Unable to find match\n"); 3779fc2cd76SKishon Vijay Abraham I ret = -EIO; 3789fc2cd76SKishon Vijay Abraham I goto tuning_error; 3799fc2cd76SKishon Vijay Abraham I } 3809fc2cd76SKishon Vijay Abraham I 381961de0a8SFaiz Abbas /* 382961de0a8SFaiz Abbas * Assign tuning value as a ratio of maximum pass window based 383961de0a8SFaiz Abbas * on temperature 384961de0a8SFaiz Abbas */ 385961de0a8SFaiz Abbas if (temperature < -20000) 386961de0a8SFaiz Abbas phase_delay = min(max_window + 4 * max_len - 24, 387961de0a8SFaiz Abbas max_window + 388961de0a8SFaiz Abbas DIV_ROUND_UP(13 * max_len, 16) * 4); 389961de0a8SFaiz Abbas else if (temperature < 20000) 390961de0a8SFaiz Abbas phase_delay = max_window + DIV_ROUND_UP(9 * max_len, 16) * 4; 391961de0a8SFaiz Abbas else if (temperature < 40000) 392961de0a8SFaiz Abbas phase_delay = max_window + DIV_ROUND_UP(8 * max_len, 16) * 4; 393961de0a8SFaiz Abbas else if (temperature < 70000) 394961de0a8SFaiz Abbas phase_delay = max_window + DIV_ROUND_UP(7 * max_len, 16) * 4; 395961de0a8SFaiz Abbas else if (temperature < 90000) 396961de0a8SFaiz Abbas phase_delay = max_window + DIV_ROUND_UP(5 * max_len, 16) * 4; 397961de0a8SFaiz Abbas else if (temperature < 120000) 398961de0a8SFaiz Abbas phase_delay = max_window + DIV_ROUND_UP(4 * max_len, 16) * 4; 399961de0a8SFaiz Abbas else 400961de0a8SFaiz Abbas phase_delay = max_window + DIV_ROUND_UP(3 * max_len, 16) * 4; 401961de0a8SFaiz Abbas 402961de0a8SFaiz Abbas /* 403961de0a8SFaiz Abbas * Stage 2: Search for a single point failure near the chosen tuning 404961de0a8SFaiz Abbas * value in two steps. First in the +3 to +10 range and then in the 405961de0a8SFaiz Abbas * +2 to -10 range. If found, move away from it in the appropriate 406961de0a8SFaiz Abbas * direction by the appropriate amount depending on the temperature. 407961de0a8SFaiz Abbas */ 408961de0a8SFaiz Abbas for (i = 3; i <= 10; i++) { 409961de0a8SFaiz Abbas sdhci_omap_set_dll(omap_host, phase_delay + i); 410961de0a8SFaiz Abbas 411961de0a8SFaiz Abbas if (mmc_send_tuning(mmc, opcode, NULL)) { 412961de0a8SFaiz Abbas if (temperature < 10000) 413961de0a8SFaiz Abbas phase_delay += i + 6; 414961de0a8SFaiz Abbas else if (temperature < 20000) 415961de0a8SFaiz Abbas phase_delay += i - 12; 416961de0a8SFaiz Abbas else if (temperature < 70000) 417961de0a8SFaiz Abbas phase_delay += i - 8; 418961de0a8SFaiz Abbas else 419961de0a8SFaiz Abbas phase_delay += i - 6; 420961de0a8SFaiz Abbas 421961de0a8SFaiz Abbas goto single_failure_found; 422961de0a8SFaiz Abbas } 423961de0a8SFaiz Abbas } 424961de0a8SFaiz Abbas 425961de0a8SFaiz Abbas for (i = 2; i >= -10; i--) { 426961de0a8SFaiz Abbas sdhci_omap_set_dll(omap_host, phase_delay + i); 427961de0a8SFaiz Abbas 428961de0a8SFaiz Abbas if (mmc_send_tuning(mmc, opcode, NULL)) { 429961de0a8SFaiz Abbas if (temperature < 10000) 430961de0a8SFaiz Abbas phase_delay += i + 12; 431961de0a8SFaiz Abbas else if (temperature < 20000) 432961de0a8SFaiz Abbas phase_delay += i + 8; 433961de0a8SFaiz Abbas else if (temperature < 70000) 434961de0a8SFaiz Abbas phase_delay += i + 8; 435961de0a8SFaiz Abbas else if (temperature < 90000) 436961de0a8SFaiz Abbas phase_delay += i + 10; 437961de0a8SFaiz Abbas else 438961de0a8SFaiz Abbas phase_delay += i + 12; 439961de0a8SFaiz Abbas 440961de0a8SFaiz Abbas goto single_failure_found; 441961de0a8SFaiz Abbas } 442961de0a8SFaiz Abbas } 443961de0a8SFaiz Abbas 444961de0a8SFaiz Abbas single_failure_found: 4459fc2cd76SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_AC12); 4469fc2cd76SKishon Vijay Abraham I if (!(reg & AC12_SCLK_SEL)) { 4479fc2cd76SKishon Vijay Abraham I ret = -EIO; 4489fc2cd76SKishon Vijay Abraham I goto tuning_error; 4499fc2cd76SKishon Vijay Abraham I } 4509fc2cd76SKishon Vijay Abraham I 4519fc2cd76SKishon Vijay Abraham I sdhci_omap_set_dll(omap_host, phase_delay); 4529fc2cd76SKishon Vijay Abraham I 4535b0d6210SFaiz Abbas omap_host->is_tuning = false; 4545b0d6210SFaiz Abbas 4559fc2cd76SKishon Vijay Abraham I goto ret; 4569fc2cd76SKishon Vijay Abraham I 4579fc2cd76SKishon Vijay Abraham I tuning_error: 4585b0d6210SFaiz Abbas omap_host->is_tuning = false; 4599fc2cd76SKishon Vijay Abraham I dev_err(dev, "Tuning failed\n"); 4609fc2cd76SKishon Vijay Abraham I sdhci_omap_disable_tuning(omap_host); 4619fc2cd76SKishon Vijay Abraham I 4629fc2cd76SKishon Vijay Abraham I ret: 4639fc2cd76SKishon Vijay Abraham I sdhci_reset(host, SDHCI_RESET_CMD | SDHCI_RESET_DATA); 464db2039fcSFaiz Abbas /* Reenable forbidden interrupt */ 465db2039fcSFaiz Abbas if (dcrc_was_enabled) 466db2039fcSFaiz Abbas host->ier |= SDHCI_INT_DATA_CRC; 4677d33c358SKishon Vijay Abraham I sdhci_writel(host, host->ier, SDHCI_INT_ENABLE); 4687d33c358SKishon Vijay Abraham I sdhci_writel(host, host->ier, SDHCI_SIGNAL_ENABLE); 4699fc2cd76SKishon Vijay Abraham I return ret; 4709fc2cd76SKishon Vijay Abraham I } 4719fc2cd76SKishon Vijay Abraham I 47220ea26a1SKishon Vijay Abraham I static int sdhci_omap_card_busy(struct mmc_host *mmc) 47320ea26a1SKishon Vijay Abraham I { 47420ea26a1SKishon Vijay Abraham I u32 reg, ac12; 47520ea26a1SKishon Vijay Abraham I int ret = false; 47620ea26a1SKishon Vijay Abraham I struct sdhci_host *host = mmc_priv(mmc); 47720ea26a1SKishon Vijay Abraham I struct sdhci_pltfm_host *pltfm_host; 47820ea26a1SKishon Vijay Abraham I struct sdhci_omap_host *omap_host; 47920ea26a1SKishon Vijay Abraham I u32 ier = host->ier; 48020ea26a1SKishon Vijay Abraham I 48120ea26a1SKishon Vijay Abraham I pltfm_host = sdhci_priv(host); 48220ea26a1SKishon Vijay Abraham I omap_host = sdhci_pltfm_priv(pltfm_host); 48320ea26a1SKishon Vijay Abraham I 48420ea26a1SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CON); 48520ea26a1SKishon Vijay Abraham I ac12 = sdhci_omap_readl(omap_host, SDHCI_OMAP_AC12); 48620ea26a1SKishon Vijay Abraham I reg &= ~CON_CLKEXTFREE; 48720ea26a1SKishon Vijay Abraham I if (ac12 & AC12_V1V8_SIGEN) 48820ea26a1SKishon Vijay Abraham I reg |= CON_CLKEXTFREE; 48920ea26a1SKishon Vijay Abraham I reg |= CON_PADEN; 49020ea26a1SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_CON, reg); 49120ea26a1SKishon Vijay Abraham I 49220ea26a1SKishon Vijay Abraham I disable_irq(host->irq); 49320ea26a1SKishon Vijay Abraham I ier |= SDHCI_INT_CARD_INT; 49420ea26a1SKishon Vijay Abraham I sdhci_writel(host, ier, SDHCI_INT_ENABLE); 49520ea26a1SKishon Vijay Abraham I sdhci_writel(host, ier, SDHCI_SIGNAL_ENABLE); 49620ea26a1SKishon Vijay Abraham I 49720ea26a1SKishon Vijay Abraham I /* 49820ea26a1SKishon Vijay Abraham I * Delay is required for PSTATE to correctly reflect 49920ea26a1SKishon Vijay Abraham I * DLEV/CLEV values after PADEN is set. 50020ea26a1SKishon Vijay Abraham I */ 50120ea26a1SKishon Vijay Abraham I usleep_range(50, 100); 50220ea26a1SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_PSTATE); 50320ea26a1SKishon Vijay Abraham I if ((reg & PSTATE_DATI) || !(reg & PSTATE_DLEV_DAT0)) 50420ea26a1SKishon Vijay Abraham I ret = true; 50520ea26a1SKishon Vijay Abraham I 50620ea26a1SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CON); 50720ea26a1SKishon Vijay Abraham I reg &= ~(CON_CLKEXTFREE | CON_PADEN); 50820ea26a1SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_CON, reg); 50920ea26a1SKishon Vijay Abraham I 51020ea26a1SKishon Vijay Abraham I sdhci_writel(host, host->ier, SDHCI_INT_ENABLE); 51120ea26a1SKishon Vijay Abraham I sdhci_writel(host, host->ier, SDHCI_SIGNAL_ENABLE); 51220ea26a1SKishon Vijay Abraham I enable_irq(host->irq); 51320ea26a1SKishon Vijay Abraham I 51420ea26a1SKishon Vijay Abraham I return ret; 51520ea26a1SKishon Vijay Abraham I } 51620ea26a1SKishon Vijay Abraham I 5177d326930SKishon Vijay Abraham I static int sdhci_omap_start_signal_voltage_switch(struct mmc_host *mmc, 5187d326930SKishon Vijay Abraham I struct mmc_ios *ios) 5197d326930SKishon Vijay Abraham I { 5207d326930SKishon Vijay Abraham I u32 reg; 5217d326930SKishon Vijay Abraham I int ret; 5227d326930SKishon Vijay Abraham I unsigned int iov; 5237d326930SKishon Vijay Abraham I struct sdhci_host *host = mmc_priv(mmc); 5247d326930SKishon Vijay Abraham I struct sdhci_pltfm_host *pltfm_host; 5257d326930SKishon Vijay Abraham I struct sdhci_omap_host *omap_host; 5267d326930SKishon Vijay Abraham I struct device *dev; 5277d326930SKishon Vijay Abraham I 5287d326930SKishon Vijay Abraham I pltfm_host = sdhci_priv(host); 5297d326930SKishon Vijay Abraham I omap_host = sdhci_pltfm_priv(pltfm_host); 5307d326930SKishon Vijay Abraham I dev = omap_host->dev; 5317d326930SKishon Vijay Abraham I 5327d326930SKishon Vijay Abraham I if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_330) { 5337d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CAPA); 5347d326930SKishon Vijay Abraham I if (!(reg & CAPA_VS33)) 5357d326930SKishon Vijay Abraham I return -EOPNOTSUPP; 5367d326930SKishon Vijay Abraham I 5377d326930SKishon Vijay Abraham I sdhci_omap_conf_bus_power(omap_host, ios->signal_voltage); 5387d326930SKishon Vijay Abraham I 5397d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_AC12); 5407d326930SKishon Vijay Abraham I reg &= ~AC12_V1V8_SIGEN; 5417d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_AC12, reg); 5427d326930SKishon Vijay Abraham I 5437d326930SKishon Vijay Abraham I iov = IOV_3V3; 5447d326930SKishon Vijay Abraham I } else if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_180) { 5457d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CAPA); 5467d326930SKishon Vijay Abraham I if (!(reg & CAPA_VS18)) 5477d326930SKishon Vijay Abraham I return -EOPNOTSUPP; 5487d326930SKishon Vijay Abraham I 5497d326930SKishon Vijay Abraham I sdhci_omap_conf_bus_power(omap_host, ios->signal_voltage); 5507d326930SKishon Vijay Abraham I 5517d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_AC12); 5527d326930SKishon Vijay Abraham I reg |= AC12_V1V8_SIGEN; 5537d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_AC12, reg); 5547d326930SKishon Vijay Abraham I 5557d326930SKishon Vijay Abraham I iov = IOV_1V8; 5567d326930SKishon Vijay Abraham I } else { 5577d326930SKishon Vijay Abraham I return -EOPNOTSUPP; 5587d326930SKishon Vijay Abraham I } 5597d326930SKishon Vijay Abraham I 5607d326930SKishon Vijay Abraham I ret = sdhci_omap_enable_iov(omap_host, iov); 5617d326930SKishon Vijay Abraham I if (ret) { 5627d326930SKishon Vijay Abraham I dev_err(dev, "failed to switch IO voltage to %dmV\n", iov); 5637d326930SKishon Vijay Abraham I return ret; 5647d326930SKishon Vijay Abraham I } 5657d326930SKishon Vijay Abraham I 5667d326930SKishon Vijay Abraham I dev_dbg(dev, "IO voltage switched to %dmV\n", iov); 5677d326930SKishon Vijay Abraham I return 0; 5687d326930SKishon Vijay Abraham I } 5697d326930SKishon Vijay Abraham I 5708d20b2eaSKishon Vijay Abraham I static void sdhci_omap_set_timing(struct sdhci_omap_host *omap_host, u8 timing) 5718d20b2eaSKishon Vijay Abraham I { 5728d20b2eaSKishon Vijay Abraham I int ret; 5738d20b2eaSKishon Vijay Abraham I struct pinctrl_state *pinctrl_state; 5748d20b2eaSKishon Vijay Abraham I struct device *dev = omap_host->dev; 5758d20b2eaSKishon Vijay Abraham I 5768d20b2eaSKishon Vijay Abraham I if (!(omap_host->flags & SDHCI_OMAP_REQUIRE_IODELAY)) 5778d20b2eaSKishon Vijay Abraham I return; 5788d20b2eaSKishon Vijay Abraham I 5798d20b2eaSKishon Vijay Abraham I if (omap_host->timing == timing) 5808d20b2eaSKishon Vijay Abraham I return; 5818d20b2eaSKishon Vijay Abraham I 5828d20b2eaSKishon Vijay Abraham I sdhci_omap_stop_clock(omap_host); 5838d20b2eaSKishon Vijay Abraham I 5848d20b2eaSKishon Vijay Abraham I pinctrl_state = omap_host->pinctrl_state[timing]; 5858d20b2eaSKishon Vijay Abraham I ret = pinctrl_select_state(omap_host->pinctrl, pinctrl_state); 5868d20b2eaSKishon Vijay Abraham I if (ret) { 5878d20b2eaSKishon Vijay Abraham I dev_err(dev, "failed to select pinctrl state\n"); 5888d20b2eaSKishon Vijay Abraham I return; 5898d20b2eaSKishon Vijay Abraham I } 5908d20b2eaSKishon Vijay Abraham I 5918d20b2eaSKishon Vijay Abraham I sdhci_omap_start_clock(omap_host); 5928d20b2eaSKishon Vijay Abraham I omap_host->timing = timing; 5938d20b2eaSKishon Vijay Abraham I } 5948d20b2eaSKishon Vijay Abraham I 595300df508SKishon Vijay Abraham I static void sdhci_omap_set_power_mode(struct sdhci_omap_host *omap_host, 596300df508SKishon Vijay Abraham I u8 power_mode) 597300df508SKishon Vijay Abraham I { 5989fc2cd76SKishon Vijay Abraham I if (omap_host->bus_mode == MMC_POWER_OFF) 5999fc2cd76SKishon Vijay Abraham I sdhci_omap_disable_tuning(omap_host); 600300df508SKishon Vijay Abraham I omap_host->power_mode = power_mode; 601300df508SKishon Vijay Abraham I } 602300df508SKishon Vijay Abraham I 6037d326930SKishon Vijay Abraham I static void sdhci_omap_set_bus_mode(struct sdhci_omap_host *omap_host, 6047d326930SKishon Vijay Abraham I unsigned int mode) 6057d326930SKishon Vijay Abraham I { 6067d326930SKishon Vijay Abraham I u32 reg; 6077d326930SKishon Vijay Abraham I 6087d326930SKishon Vijay Abraham I if (omap_host->bus_mode == mode) 6097d326930SKishon Vijay Abraham I return; 6107d326930SKishon Vijay Abraham I 6117d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CON); 6127d326930SKishon Vijay Abraham I if (mode == MMC_BUSMODE_OPENDRAIN) 6137d326930SKishon Vijay Abraham I reg |= CON_OD; 6147d326930SKishon Vijay Abraham I else 6157d326930SKishon Vijay Abraham I reg &= ~CON_OD; 6167d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_CON, reg); 6177d326930SKishon Vijay Abraham I 6187d326930SKishon Vijay Abraham I omap_host->bus_mode = mode; 6197d326930SKishon Vijay Abraham I } 6207d326930SKishon Vijay Abraham I 621ddde0e7dSColin Ian King static void sdhci_omap_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) 6227d326930SKishon Vijay Abraham I { 6237d326930SKishon Vijay Abraham I struct sdhci_host *host = mmc_priv(mmc); 6247d326930SKishon Vijay Abraham I struct sdhci_pltfm_host *pltfm_host; 6257d326930SKishon Vijay Abraham I struct sdhci_omap_host *omap_host; 6267d326930SKishon Vijay Abraham I 6277d326930SKishon Vijay Abraham I pltfm_host = sdhci_priv(host); 6287d326930SKishon Vijay Abraham I omap_host = sdhci_pltfm_priv(pltfm_host); 6297d326930SKishon Vijay Abraham I 6307d326930SKishon Vijay Abraham I sdhci_omap_set_bus_mode(omap_host, ios->bus_mode); 6318d20b2eaSKishon Vijay Abraham I sdhci_omap_set_timing(omap_host, ios->timing); 6327d326930SKishon Vijay Abraham I sdhci_set_ios(mmc, ios); 633300df508SKishon Vijay Abraham I sdhci_omap_set_power_mode(omap_host, ios->power_mode); 6347d326930SKishon Vijay Abraham I } 6357d326930SKishon Vijay Abraham I 6367d326930SKishon Vijay Abraham I static u16 sdhci_omap_calc_divisor(struct sdhci_pltfm_host *host, 6377d326930SKishon Vijay Abraham I unsigned int clock) 6387d326930SKishon Vijay Abraham I { 6397d326930SKishon Vijay Abraham I u16 dsor; 6407d326930SKishon Vijay Abraham I 6417d326930SKishon Vijay Abraham I dsor = DIV_ROUND_UP(clk_get_rate(host->clk), clock); 6427d326930SKishon Vijay Abraham I if (dsor > SYSCTL_CLKD_MAX) 6437d326930SKishon Vijay Abraham I dsor = SYSCTL_CLKD_MAX; 6447d326930SKishon Vijay Abraham I 6457d326930SKishon Vijay Abraham I return dsor; 6467d326930SKishon Vijay Abraham I } 6477d326930SKishon Vijay Abraham I 6487d326930SKishon Vijay Abraham I static void sdhci_omap_start_clock(struct sdhci_omap_host *omap_host) 6497d326930SKishon Vijay Abraham I { 6507d326930SKishon Vijay Abraham I u32 reg; 6517d326930SKishon Vijay Abraham I 6527d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_SYSCTL); 6537d326930SKishon Vijay Abraham I reg |= SYSCTL_CEN; 6547d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_SYSCTL, reg); 6557d326930SKishon Vijay Abraham I } 6567d326930SKishon Vijay Abraham I 6577d326930SKishon Vijay Abraham I static void sdhci_omap_stop_clock(struct sdhci_omap_host *omap_host) 6587d326930SKishon Vijay Abraham I { 6597d326930SKishon Vijay Abraham I u32 reg; 6607d326930SKishon Vijay Abraham I 6617d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_SYSCTL); 6627d326930SKishon Vijay Abraham I reg &= ~SYSCTL_CEN; 6637d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_SYSCTL, reg); 6647d326930SKishon Vijay Abraham I } 6657d326930SKishon Vijay Abraham I 6667d326930SKishon Vijay Abraham I static void sdhci_omap_set_clock(struct sdhci_host *host, unsigned int clock) 6677d326930SKishon Vijay Abraham I { 6687d326930SKishon Vijay Abraham I struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 6697d326930SKishon Vijay Abraham I struct sdhci_omap_host *omap_host = sdhci_pltfm_priv(pltfm_host); 6707d326930SKishon Vijay Abraham I unsigned long clkdiv; 6717d326930SKishon Vijay Abraham I 6727d326930SKishon Vijay Abraham I sdhci_omap_stop_clock(omap_host); 6737d326930SKishon Vijay Abraham I 6747d326930SKishon Vijay Abraham I if (!clock) 6757d326930SKishon Vijay Abraham I return; 6767d326930SKishon Vijay Abraham I 6777d326930SKishon Vijay Abraham I clkdiv = sdhci_omap_calc_divisor(pltfm_host, clock); 6787d326930SKishon Vijay Abraham I clkdiv = (clkdiv & SYSCTL_CLKD_MASK) << SYSCTL_CLKD_SHIFT; 6797d326930SKishon Vijay Abraham I sdhci_enable_clk(host, clkdiv); 6807d326930SKishon Vijay Abraham I 6817d326930SKishon Vijay Abraham I sdhci_omap_start_clock(omap_host); 6827d326930SKishon Vijay Abraham I } 6837d326930SKishon Vijay Abraham I 684ddde0e7dSColin Ian King static void sdhci_omap_set_power(struct sdhci_host *host, unsigned char mode, 6857d326930SKishon Vijay Abraham I unsigned short vdd) 6867d326930SKishon Vijay Abraham I { 6877d326930SKishon Vijay Abraham I struct mmc_host *mmc = host->mmc; 6887d326930SKishon Vijay Abraham I 6897d326930SKishon Vijay Abraham I mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, vdd); 6907d326930SKishon Vijay Abraham I } 6917d326930SKishon Vijay Abraham I 6927d326930SKishon Vijay Abraham I static int sdhci_omap_enable_dma(struct sdhci_host *host) 6937d326930SKishon Vijay Abraham I { 6947d326930SKishon Vijay Abraham I u32 reg; 6957d326930SKishon Vijay Abraham I struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 6967d326930SKishon Vijay Abraham I struct sdhci_omap_host *omap_host = sdhci_pltfm_priv(pltfm_host); 6977d326930SKishon Vijay Abraham I 6987d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CON); 6997d326930SKishon Vijay Abraham I reg |= CON_DMA_MASTER; 7007d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_CON, reg); 7017d326930SKishon Vijay Abraham I 7027d326930SKishon Vijay Abraham I return 0; 7037d326930SKishon Vijay Abraham I } 7047d326930SKishon Vijay Abraham I 705ddde0e7dSColin Ian King static unsigned int sdhci_omap_get_min_clock(struct sdhci_host *host) 7067d326930SKishon Vijay Abraham I { 7077d326930SKishon Vijay Abraham I struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 7087d326930SKishon Vijay Abraham I 7097d326930SKishon Vijay Abraham I return clk_get_rate(pltfm_host->clk) / SYSCTL_CLKD_MAX; 7107d326930SKishon Vijay Abraham I } 7117d326930SKishon Vijay Abraham I 7127d326930SKishon Vijay Abraham I static void sdhci_omap_set_bus_width(struct sdhci_host *host, int width) 7137d326930SKishon Vijay Abraham I { 7147d326930SKishon Vijay Abraham I struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 7157d326930SKishon Vijay Abraham I struct sdhci_omap_host *omap_host = sdhci_pltfm_priv(pltfm_host); 7167d326930SKishon Vijay Abraham I u32 reg; 7177d326930SKishon Vijay Abraham I 7187d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CON); 7197d326930SKishon Vijay Abraham I if (width == MMC_BUS_WIDTH_8) 7207d326930SKishon Vijay Abraham I reg |= CON_DW8; 7217d326930SKishon Vijay Abraham I else 7227d326930SKishon Vijay Abraham I reg &= ~CON_DW8; 7237d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_CON, reg); 7247d326930SKishon Vijay Abraham I 7257d326930SKishon Vijay Abraham I sdhci_set_bus_width(host, width); 7267d326930SKishon Vijay Abraham I } 7277d326930SKishon Vijay Abraham I 7287d326930SKishon Vijay Abraham I static void sdhci_omap_init_74_clocks(struct sdhci_host *host, u8 power_mode) 7297d326930SKishon Vijay Abraham I { 7307d326930SKishon Vijay Abraham I u32 reg; 7317d326930SKishon Vijay Abraham I ktime_t timeout; 7327d326930SKishon Vijay Abraham I struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 7337d326930SKishon Vijay Abraham I struct sdhci_omap_host *omap_host = sdhci_pltfm_priv(pltfm_host); 7347d326930SKishon Vijay Abraham I 7357d326930SKishon Vijay Abraham I if (omap_host->power_mode == power_mode) 7367d326930SKishon Vijay Abraham I return; 7377d326930SKishon Vijay Abraham I 7387d326930SKishon Vijay Abraham I if (power_mode != MMC_POWER_ON) 7397d326930SKishon Vijay Abraham I return; 7407d326930SKishon Vijay Abraham I 7417d326930SKishon Vijay Abraham I disable_irq(host->irq); 7427d326930SKishon Vijay Abraham I 7437d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CON); 7447d326930SKishon Vijay Abraham I reg |= CON_INIT; 7457d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_CON, reg); 7467d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_CMD, 0x0); 7477d326930SKishon Vijay Abraham I 7487d326930SKishon Vijay Abraham I /* wait 1ms */ 7497d326930SKishon Vijay Abraham I timeout = ktime_add_ms(ktime_get(), SDHCI_OMAP_TIMEOUT); 7509f0ea0bdSAdrian Hunter while (1) { 7519f0ea0bdSAdrian Hunter bool timedout = ktime_after(ktime_get(), timeout); 7529f0ea0bdSAdrian Hunter 7539f0ea0bdSAdrian Hunter if (sdhci_omap_readl(omap_host, SDHCI_OMAP_STAT) & INT_CC_EN) 7549f0ea0bdSAdrian Hunter break; 7559f0ea0bdSAdrian Hunter if (WARN_ON(timedout)) 7567d326930SKishon Vijay Abraham I return; 7577d326930SKishon Vijay Abraham I usleep_range(5, 10); 7587d326930SKishon Vijay Abraham I } 7597d326930SKishon Vijay Abraham I 7607d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CON); 7617d326930SKishon Vijay Abraham I reg &= ~CON_INIT; 7627d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_CON, reg); 7637d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_STAT, INT_CC_EN); 7647d326930SKishon Vijay Abraham I 7657d326930SKishon Vijay Abraham I enable_irq(host->irq); 7667d326930SKishon Vijay Abraham I } 7677d326930SKishon Vijay Abraham I 76827ceb7e0SKishon Vijay Abraham I static void sdhci_omap_set_uhs_signaling(struct sdhci_host *host, 76927ceb7e0SKishon Vijay Abraham I unsigned int timing) 77027ceb7e0SKishon Vijay Abraham I { 77127ceb7e0SKishon Vijay Abraham I u32 reg; 77227ceb7e0SKishon Vijay Abraham I struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 77327ceb7e0SKishon Vijay Abraham I struct sdhci_omap_host *omap_host = sdhci_pltfm_priv(pltfm_host); 77427ceb7e0SKishon Vijay Abraham I 77527ceb7e0SKishon Vijay Abraham I sdhci_omap_stop_clock(omap_host); 77627ceb7e0SKishon Vijay Abraham I 77727ceb7e0SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CON); 77827ceb7e0SKishon Vijay Abraham I if (timing == MMC_TIMING_UHS_DDR50 || timing == MMC_TIMING_MMC_DDR52) 77927ceb7e0SKishon Vijay Abraham I reg |= CON_DDR; 78027ceb7e0SKishon Vijay Abraham I else 78127ceb7e0SKishon Vijay Abraham I reg &= ~CON_DDR; 78227ceb7e0SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_CON, reg); 78327ceb7e0SKishon Vijay Abraham I 78427ceb7e0SKishon Vijay Abraham I sdhci_set_uhs_signaling(host, timing); 78527ceb7e0SKishon Vijay Abraham I sdhci_omap_start_clock(omap_host); 78627ceb7e0SKishon Vijay Abraham I } 78727ceb7e0SKishon Vijay Abraham I 7885b0d6210SFaiz Abbas void sdhci_omap_reset(struct sdhci_host *host, u8 mask) 7895b0d6210SFaiz Abbas { 7905b0d6210SFaiz Abbas struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 7915b0d6210SFaiz Abbas struct sdhci_omap_host *omap_host = sdhci_pltfm_priv(pltfm_host); 7925b0d6210SFaiz Abbas 7935b0d6210SFaiz Abbas /* Don't reset data lines during tuning operation */ 7945b0d6210SFaiz Abbas if (omap_host->is_tuning) 7955b0d6210SFaiz Abbas mask &= ~SDHCI_RESET_DATA; 7965b0d6210SFaiz Abbas 7975b0d6210SFaiz Abbas sdhci_reset(host, mask); 7985b0d6210SFaiz Abbas } 7995b0d6210SFaiz Abbas 8007d326930SKishon Vijay Abraham I static struct sdhci_ops sdhci_omap_ops = { 8017d326930SKishon Vijay Abraham I .set_clock = sdhci_omap_set_clock, 8027d326930SKishon Vijay Abraham I .set_power = sdhci_omap_set_power, 8037d326930SKishon Vijay Abraham I .enable_dma = sdhci_omap_enable_dma, 8047d326930SKishon Vijay Abraham I .get_max_clock = sdhci_pltfm_clk_get_max_clock, 8057d326930SKishon Vijay Abraham I .get_min_clock = sdhci_omap_get_min_clock, 8067d326930SKishon Vijay Abraham I .set_bus_width = sdhci_omap_set_bus_width, 8077d326930SKishon Vijay Abraham I .platform_send_init_74_clocks = sdhci_omap_init_74_clocks, 8085b0d6210SFaiz Abbas .reset = sdhci_omap_reset, 80927ceb7e0SKishon Vijay Abraham I .set_uhs_signaling = sdhci_omap_set_uhs_signaling, 8107d326930SKishon Vijay Abraham I }; 8117d326930SKishon Vijay Abraham I 8127d326930SKishon Vijay Abraham I static int sdhci_omap_set_capabilities(struct sdhci_omap_host *omap_host) 8137d326930SKishon Vijay Abraham I { 8147d326930SKishon Vijay Abraham I u32 reg; 8157d326930SKishon Vijay Abraham I int ret = 0; 8167d326930SKishon Vijay Abraham I struct device *dev = omap_host->dev; 8177d326930SKishon Vijay Abraham I struct regulator *vqmmc; 8187d326930SKishon Vijay Abraham I 8197d326930SKishon Vijay Abraham I vqmmc = regulator_get(dev, "vqmmc"); 8207d326930SKishon Vijay Abraham I if (IS_ERR(vqmmc)) { 8217d326930SKishon Vijay Abraham I ret = PTR_ERR(vqmmc); 8227d326930SKishon Vijay Abraham I goto reg_put; 8237d326930SKishon Vijay Abraham I } 8247d326930SKishon Vijay Abraham I 8257d326930SKishon Vijay Abraham I /* voltage capabilities might be set by boot loader, clear it */ 8267d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CAPA); 8277d326930SKishon Vijay Abraham I reg &= ~(CAPA_VS18 | CAPA_VS30 | CAPA_VS33); 8287d326930SKishon Vijay Abraham I 8297d326930SKishon Vijay Abraham I if (regulator_is_supported_voltage(vqmmc, IOV_3V3, IOV_3V3)) 8307d326930SKishon Vijay Abraham I reg |= CAPA_VS33; 8317d326930SKishon Vijay Abraham I if (regulator_is_supported_voltage(vqmmc, IOV_1V8, IOV_1V8)) 8327d326930SKishon Vijay Abraham I reg |= CAPA_VS18; 8337d326930SKishon Vijay Abraham I 8347d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_CAPA, reg); 8357d326930SKishon Vijay Abraham I 8367d326930SKishon Vijay Abraham I reg_put: 8377d326930SKishon Vijay Abraham I regulator_put(vqmmc); 8387d326930SKishon Vijay Abraham I 8397d326930SKishon Vijay Abraham I return ret; 8407d326930SKishon Vijay Abraham I } 8417d326930SKishon Vijay Abraham I 8427d326930SKishon Vijay Abraham I static const struct sdhci_pltfm_data sdhci_omap_pdata = { 8437d326930SKishon Vijay Abraham I .quirks = SDHCI_QUIRK_BROKEN_CARD_DETECTION | 8447d326930SKishon Vijay Abraham I SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK | 8457d326930SKishon Vijay Abraham I SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN | 8467d326930SKishon Vijay Abraham I SDHCI_QUIRK_NO_HISPD_BIT | 8477d326930SKishon Vijay Abraham I SDHCI_QUIRK_BROKEN_ADMA_ZEROLEN_DESC, 848e0b2dbcfSKishon Vijay Abraham I .quirks2 = SDHCI_QUIRK2_ACMD23_BROKEN | 849e0b2dbcfSKishon Vijay Abraham I SDHCI_QUIRK2_PRESET_VALUE_BROKEN | 85025f80d86SKishon Vijay Abraham I SDHCI_QUIRK2_RSP_136_HAS_CRC | 85125f80d86SKishon Vijay Abraham I SDHCI_QUIRK2_DISABLE_HW_TIMEOUT, 8527d326930SKishon Vijay Abraham I .ops = &sdhci_omap_ops, 8537d326930SKishon Vijay Abraham I }; 8547d326930SKishon Vijay Abraham I 8556d75df75SKishon Vijay Abraham I static const struct sdhci_omap_data k2g_data = { 8566d75df75SKishon Vijay Abraham I .offset = 0x200, 8576d75df75SKishon Vijay Abraham I }; 8586d75df75SKishon Vijay Abraham I 8597d326930SKishon Vijay Abraham I static const struct sdhci_omap_data dra7_data = { 8607d326930SKishon Vijay Abraham I .offset = 0x200, 8618d20b2eaSKishon Vijay Abraham I .flags = SDHCI_OMAP_REQUIRE_IODELAY, 8627d326930SKishon Vijay Abraham I }; 8637d326930SKishon Vijay Abraham I 8647d326930SKishon Vijay Abraham I static const struct of_device_id omap_sdhci_match[] = { 8657d326930SKishon Vijay Abraham I { .compatible = "ti,dra7-sdhci", .data = &dra7_data }, 8666d75df75SKishon Vijay Abraham I { .compatible = "ti,k2g-sdhci", .data = &k2g_data }, 8677d326930SKishon Vijay Abraham I {}, 8687d326930SKishon Vijay Abraham I }; 8697d326930SKishon Vijay Abraham I MODULE_DEVICE_TABLE(of, omap_sdhci_match); 8707d326930SKishon Vijay Abraham I 8718d20b2eaSKishon Vijay Abraham I static struct pinctrl_state 8728d20b2eaSKishon Vijay Abraham I *sdhci_omap_iodelay_pinctrl_state(struct sdhci_omap_host *omap_host, char *mode, 8738d20b2eaSKishon Vijay Abraham I u32 *caps, u32 capmask) 8748d20b2eaSKishon Vijay Abraham I { 8758d20b2eaSKishon Vijay Abraham I struct device *dev = omap_host->dev; 876212f4f8aSKishon Vijay Abraham I char *version = omap_host->version; 8778d20b2eaSKishon Vijay Abraham I struct pinctrl_state *pinctrl_state = ERR_PTR(-ENODEV); 878212f4f8aSKishon Vijay Abraham I char str[20]; 8798d20b2eaSKishon Vijay Abraham I 8808d20b2eaSKishon Vijay Abraham I if (!(*caps & capmask)) 8818d20b2eaSKishon Vijay Abraham I goto ret; 8828d20b2eaSKishon Vijay Abraham I 883212f4f8aSKishon Vijay Abraham I if (version) { 884212f4f8aSKishon Vijay Abraham I snprintf(str, 20, "%s-%s", mode, version); 885212f4f8aSKishon Vijay Abraham I pinctrl_state = pinctrl_lookup_state(omap_host->pinctrl, str); 886212f4f8aSKishon Vijay Abraham I } 887212f4f8aSKishon Vijay Abraham I 888212f4f8aSKishon Vijay Abraham I if (IS_ERR(pinctrl_state)) 8898d20b2eaSKishon Vijay Abraham I pinctrl_state = pinctrl_lookup_state(omap_host->pinctrl, mode); 890212f4f8aSKishon Vijay Abraham I 8918d20b2eaSKishon Vijay Abraham I if (IS_ERR(pinctrl_state)) { 8928d20b2eaSKishon Vijay Abraham I dev_err(dev, "no pinctrl state for %s mode", mode); 8938d20b2eaSKishon Vijay Abraham I *caps &= ~capmask; 8948d20b2eaSKishon Vijay Abraham I } 8958d20b2eaSKishon Vijay Abraham I 8968d20b2eaSKishon Vijay Abraham I ret: 8978d20b2eaSKishon Vijay Abraham I return pinctrl_state; 8988d20b2eaSKishon Vijay Abraham I } 8998d20b2eaSKishon Vijay Abraham I 9008d20b2eaSKishon Vijay Abraham I static int sdhci_omap_config_iodelay_pinctrl_state(struct sdhci_omap_host 9018d20b2eaSKishon Vijay Abraham I *omap_host) 9028d20b2eaSKishon Vijay Abraham I { 9038d20b2eaSKishon Vijay Abraham I struct device *dev = omap_host->dev; 9048d20b2eaSKishon Vijay Abraham I struct sdhci_host *host = omap_host->host; 9058d20b2eaSKishon Vijay Abraham I struct mmc_host *mmc = host->mmc; 9068d20b2eaSKishon Vijay Abraham I u32 *caps = &mmc->caps; 9078d20b2eaSKishon Vijay Abraham I u32 *caps2 = &mmc->caps2; 9088d20b2eaSKishon Vijay Abraham I struct pinctrl_state *state; 9098d20b2eaSKishon Vijay Abraham I struct pinctrl_state **pinctrl_state; 9108d20b2eaSKishon Vijay Abraham I 9118d20b2eaSKishon Vijay Abraham I if (!(omap_host->flags & SDHCI_OMAP_REQUIRE_IODELAY)) 9128d20b2eaSKishon Vijay Abraham I return 0; 9138d20b2eaSKishon Vijay Abraham I 914a86854d0SKees Cook pinctrl_state = devm_kcalloc(dev, 915a86854d0SKees Cook MMC_TIMING_MMC_HS200 + 1, 916a86854d0SKees Cook sizeof(*pinctrl_state), 917a86854d0SKees Cook GFP_KERNEL); 9188d20b2eaSKishon Vijay Abraham I if (!pinctrl_state) 9198d20b2eaSKishon Vijay Abraham I return -ENOMEM; 9208d20b2eaSKishon Vijay Abraham I 9218d20b2eaSKishon Vijay Abraham I omap_host->pinctrl = devm_pinctrl_get(omap_host->dev); 9228d20b2eaSKishon Vijay Abraham I if (IS_ERR(omap_host->pinctrl)) { 9238d20b2eaSKishon Vijay Abraham I dev_err(dev, "Cannot get pinctrl\n"); 9248d20b2eaSKishon Vijay Abraham I return PTR_ERR(omap_host->pinctrl); 9258d20b2eaSKishon Vijay Abraham I } 9268d20b2eaSKishon Vijay Abraham I 9278d20b2eaSKishon Vijay Abraham I state = pinctrl_lookup_state(omap_host->pinctrl, "default"); 9288d20b2eaSKishon Vijay Abraham I if (IS_ERR(state)) { 9298d20b2eaSKishon Vijay Abraham I dev_err(dev, "no pinctrl state for default mode\n"); 9308d20b2eaSKishon Vijay Abraham I return PTR_ERR(state); 9318d20b2eaSKishon Vijay Abraham I } 9328d20b2eaSKishon Vijay Abraham I pinctrl_state[MMC_TIMING_LEGACY] = state; 9338d20b2eaSKishon Vijay Abraham I 9348d20b2eaSKishon Vijay Abraham I state = sdhci_omap_iodelay_pinctrl_state(omap_host, "sdr104", caps, 9358d20b2eaSKishon Vijay Abraham I MMC_CAP_UHS_SDR104); 9368d20b2eaSKishon Vijay Abraham I if (!IS_ERR(state)) 9378d20b2eaSKishon Vijay Abraham I pinctrl_state[MMC_TIMING_UHS_SDR104] = state; 9388d20b2eaSKishon Vijay Abraham I 9398d20b2eaSKishon Vijay Abraham I state = sdhci_omap_iodelay_pinctrl_state(omap_host, "ddr50", caps, 9408d20b2eaSKishon Vijay Abraham I MMC_CAP_UHS_DDR50); 9418d20b2eaSKishon Vijay Abraham I if (!IS_ERR(state)) 9428d20b2eaSKishon Vijay Abraham I pinctrl_state[MMC_TIMING_UHS_DDR50] = state; 9438d20b2eaSKishon Vijay Abraham I 9448d20b2eaSKishon Vijay Abraham I state = sdhci_omap_iodelay_pinctrl_state(omap_host, "sdr50", caps, 9458d20b2eaSKishon Vijay Abraham I MMC_CAP_UHS_SDR50); 9468d20b2eaSKishon Vijay Abraham I if (!IS_ERR(state)) 9478d20b2eaSKishon Vijay Abraham I pinctrl_state[MMC_TIMING_UHS_SDR50] = state; 9488d20b2eaSKishon Vijay Abraham I 9498d20b2eaSKishon Vijay Abraham I state = sdhci_omap_iodelay_pinctrl_state(omap_host, "sdr25", caps, 9508d20b2eaSKishon Vijay Abraham I MMC_CAP_UHS_SDR25); 9518d20b2eaSKishon Vijay Abraham I if (!IS_ERR(state)) 9528d20b2eaSKishon Vijay Abraham I pinctrl_state[MMC_TIMING_UHS_SDR25] = state; 9538d20b2eaSKishon Vijay Abraham I 9548d20b2eaSKishon Vijay Abraham I state = sdhci_omap_iodelay_pinctrl_state(omap_host, "sdr12", caps, 9558d20b2eaSKishon Vijay Abraham I MMC_CAP_UHS_SDR12); 9568d20b2eaSKishon Vijay Abraham I if (!IS_ERR(state)) 9578d20b2eaSKishon Vijay Abraham I pinctrl_state[MMC_TIMING_UHS_SDR12] = state; 9588d20b2eaSKishon Vijay Abraham I 9598d20b2eaSKishon Vijay Abraham I state = sdhci_omap_iodelay_pinctrl_state(omap_host, "ddr_1_8v", caps, 9608d20b2eaSKishon Vijay Abraham I MMC_CAP_1_8V_DDR); 9613f402878SKishon Vijay Abraham I if (!IS_ERR(state)) { 9623f402878SKishon Vijay Abraham I pinctrl_state[MMC_TIMING_MMC_DDR52] = state; 9633f402878SKishon Vijay Abraham I } else { 9643f402878SKishon Vijay Abraham I state = sdhci_omap_iodelay_pinctrl_state(omap_host, "ddr_3_3v", 9653f402878SKishon Vijay Abraham I caps, 9663f402878SKishon Vijay Abraham I MMC_CAP_3_3V_DDR); 9678d20b2eaSKishon Vijay Abraham I if (!IS_ERR(state)) 9688d20b2eaSKishon Vijay Abraham I pinctrl_state[MMC_TIMING_MMC_DDR52] = state; 9693f402878SKishon Vijay Abraham I } 9708d20b2eaSKishon Vijay Abraham I 9718d20b2eaSKishon Vijay Abraham I state = sdhci_omap_iodelay_pinctrl_state(omap_host, "hs", caps, 9728d20b2eaSKishon Vijay Abraham I MMC_CAP_SD_HIGHSPEED); 9738d20b2eaSKishon Vijay Abraham I if (!IS_ERR(state)) 9748d20b2eaSKishon Vijay Abraham I pinctrl_state[MMC_TIMING_SD_HS] = state; 9758d20b2eaSKishon Vijay Abraham I 9768d20b2eaSKishon Vijay Abraham I state = sdhci_omap_iodelay_pinctrl_state(omap_host, "hs", caps, 9778d20b2eaSKishon Vijay Abraham I MMC_CAP_MMC_HIGHSPEED); 9788d20b2eaSKishon Vijay Abraham I if (!IS_ERR(state)) 9798d20b2eaSKishon Vijay Abraham I pinctrl_state[MMC_TIMING_MMC_HS] = state; 9808d20b2eaSKishon Vijay Abraham I 9818d20b2eaSKishon Vijay Abraham I state = sdhci_omap_iodelay_pinctrl_state(omap_host, "hs200_1_8v", caps2, 9828d20b2eaSKishon Vijay Abraham I MMC_CAP2_HS200_1_8V_SDR); 9838d20b2eaSKishon Vijay Abraham I if (!IS_ERR(state)) 9848d20b2eaSKishon Vijay Abraham I pinctrl_state[MMC_TIMING_MMC_HS200] = state; 9858d20b2eaSKishon Vijay Abraham I 9868d20b2eaSKishon Vijay Abraham I omap_host->pinctrl_state = pinctrl_state; 9878d20b2eaSKishon Vijay Abraham I 9888d20b2eaSKishon Vijay Abraham I return 0; 9898d20b2eaSKishon Vijay Abraham I } 9908d20b2eaSKishon Vijay Abraham I 991212f4f8aSKishon Vijay Abraham I static const struct soc_device_attribute sdhci_omap_soc_devices[] = { 992212f4f8aSKishon Vijay Abraham I { 993212f4f8aSKishon Vijay Abraham I .machine = "DRA7[45]*", 994212f4f8aSKishon Vijay Abraham I .revision = "ES1.[01]", 995212f4f8aSKishon Vijay Abraham I }, 996212f4f8aSKishon Vijay Abraham I { 997212f4f8aSKishon Vijay Abraham I /* sentinel */ 998212f4f8aSKishon Vijay Abraham I } 999212f4f8aSKishon Vijay Abraham I }; 1000212f4f8aSKishon Vijay Abraham I 10017d326930SKishon Vijay Abraham I static int sdhci_omap_probe(struct platform_device *pdev) 10027d326930SKishon Vijay Abraham I { 10037d326930SKishon Vijay Abraham I int ret; 10047d326930SKishon Vijay Abraham I u32 offset; 10057d326930SKishon Vijay Abraham I struct device *dev = &pdev->dev; 10067d326930SKishon Vijay Abraham I struct sdhci_host *host; 10077d326930SKishon Vijay Abraham I struct sdhci_pltfm_host *pltfm_host; 10087d326930SKishon Vijay Abraham I struct sdhci_omap_host *omap_host; 10097d326930SKishon Vijay Abraham I struct mmc_host *mmc; 10107d326930SKishon Vijay Abraham I const struct of_device_id *match; 10117d326930SKishon Vijay Abraham I struct sdhci_omap_data *data; 1012212f4f8aSKishon Vijay Abraham I const struct soc_device_attribute *soc; 10137d326930SKishon Vijay Abraham I 10147d326930SKishon Vijay Abraham I match = of_match_device(omap_sdhci_match, dev); 10157d326930SKishon Vijay Abraham I if (!match) 10167d326930SKishon Vijay Abraham I return -EINVAL; 10177d326930SKishon Vijay Abraham I 10187d326930SKishon Vijay Abraham I data = (struct sdhci_omap_data *)match->data; 10197d326930SKishon Vijay Abraham I if (!data) { 10207d326930SKishon Vijay Abraham I dev_err(dev, "no sdhci omap data\n"); 10217d326930SKishon Vijay Abraham I return -EINVAL; 10227d326930SKishon Vijay Abraham I } 10237d326930SKishon Vijay Abraham I offset = data->offset; 10247d326930SKishon Vijay Abraham I 10257d326930SKishon Vijay Abraham I host = sdhci_pltfm_init(pdev, &sdhci_omap_pdata, 10267d326930SKishon Vijay Abraham I sizeof(*omap_host)); 10277d326930SKishon Vijay Abraham I if (IS_ERR(host)) { 10287d326930SKishon Vijay Abraham I dev_err(dev, "Failed sdhci_pltfm_init\n"); 10297d326930SKishon Vijay Abraham I return PTR_ERR(host); 10307d326930SKishon Vijay Abraham I } 10317d326930SKishon Vijay Abraham I 10327d326930SKishon Vijay Abraham I pltfm_host = sdhci_priv(host); 10337d326930SKishon Vijay Abraham I omap_host = sdhci_pltfm_priv(pltfm_host); 10347d326930SKishon Vijay Abraham I omap_host->host = host; 10357d326930SKishon Vijay Abraham I omap_host->base = host->ioaddr; 10367d326930SKishon Vijay Abraham I omap_host->dev = dev; 1037300df508SKishon Vijay Abraham I omap_host->power_mode = MMC_POWER_UNDEFINED; 10388d20b2eaSKishon Vijay Abraham I omap_host->timing = MMC_TIMING_LEGACY; 10398d20b2eaSKishon Vijay Abraham I omap_host->flags = data->flags; 10407d326930SKishon Vijay Abraham I host->ioaddr += offset; 10417d326930SKishon Vijay Abraham I 10427d326930SKishon Vijay Abraham I mmc = host->mmc; 10431d3a2220SKishon Vijay Abraham I sdhci_get_of_property(pdev); 10447d326930SKishon Vijay Abraham I ret = mmc_of_parse(mmc); 10457d326930SKishon Vijay Abraham I if (ret) 10467d326930SKishon Vijay Abraham I goto err_pltfm_free; 10477d326930SKishon Vijay Abraham I 1048212f4f8aSKishon Vijay Abraham I soc = soc_device_match(sdhci_omap_soc_devices); 1049212f4f8aSKishon Vijay Abraham I if (soc) { 1050212f4f8aSKishon Vijay Abraham I omap_host->version = "rev11"; 1051212f4f8aSKishon Vijay Abraham I if (!strcmp(dev_name(dev), "4809c000.mmc")) 1052212f4f8aSKishon Vijay Abraham I mmc->f_max = 96000000; 1053212f4f8aSKishon Vijay Abraham I if (!strcmp(dev_name(dev), "480b4000.mmc")) 1054212f4f8aSKishon Vijay Abraham I mmc->f_max = 48000000; 1055212f4f8aSKishon Vijay Abraham I if (!strcmp(dev_name(dev), "480ad000.mmc")) 1056212f4f8aSKishon Vijay Abraham I mmc->f_max = 48000000; 1057212f4f8aSKishon Vijay Abraham I } 1058212f4f8aSKishon Vijay Abraham I 10597d326930SKishon Vijay Abraham I pltfm_host->clk = devm_clk_get(dev, "fck"); 10607d326930SKishon Vijay Abraham I if (IS_ERR(pltfm_host->clk)) { 10617d326930SKishon Vijay Abraham I ret = PTR_ERR(pltfm_host->clk); 10627d326930SKishon Vijay Abraham I goto err_pltfm_free; 10637d326930SKishon Vijay Abraham I } 10647d326930SKishon Vijay Abraham I 10657d326930SKishon Vijay Abraham I ret = clk_set_rate(pltfm_host->clk, mmc->f_max); 10667d326930SKishon Vijay Abraham I if (ret) { 10677d326930SKishon Vijay Abraham I dev_err(dev, "failed to set clock to %d\n", mmc->f_max); 10687d326930SKishon Vijay Abraham I goto err_pltfm_free; 10697d326930SKishon Vijay Abraham I } 10707d326930SKishon Vijay Abraham I 10717d326930SKishon Vijay Abraham I omap_host->pbias = devm_regulator_get_optional(dev, "pbias"); 10727d326930SKishon Vijay Abraham I if (IS_ERR(omap_host->pbias)) { 10737d326930SKishon Vijay Abraham I ret = PTR_ERR(omap_host->pbias); 10747d326930SKishon Vijay Abraham I if (ret != -ENODEV) 10757d326930SKishon Vijay Abraham I goto err_pltfm_free; 10767d326930SKishon Vijay Abraham I dev_dbg(dev, "unable to get pbias regulator %d\n", ret); 10777d326930SKishon Vijay Abraham I } 10787d326930SKishon Vijay Abraham I omap_host->pbias_enabled = false; 10797d326930SKishon Vijay Abraham I 10807d326930SKishon Vijay Abraham I /* 10817d326930SKishon Vijay Abraham I * omap_device_pm_domain has callbacks to enable the main 10827d326930SKishon Vijay Abraham I * functional clock, interface clock and also configure the 10837d326930SKishon Vijay Abraham I * SYSCONFIG register of omap devices. The callback will be invoked 10847d326930SKishon Vijay Abraham I * as part of pm_runtime_get_sync. 10857d326930SKishon Vijay Abraham I */ 10867d326930SKishon Vijay Abraham I pm_runtime_enable(dev); 10877d326930SKishon Vijay Abraham I ret = pm_runtime_get_sync(dev); 10887d326930SKishon Vijay Abraham I if (ret < 0) { 10897d326930SKishon Vijay Abraham I dev_err(dev, "pm_runtime_get_sync failed\n"); 10907d326930SKishon Vijay Abraham I pm_runtime_put_noidle(dev); 10917d326930SKishon Vijay Abraham I goto err_rpm_disable; 10927d326930SKishon Vijay Abraham I } 10937d326930SKishon Vijay Abraham I 10947d326930SKishon Vijay Abraham I ret = sdhci_omap_set_capabilities(omap_host); 10957d326930SKishon Vijay Abraham I if (ret) { 10967d326930SKishon Vijay Abraham I dev_err(dev, "failed to set system capabilities\n"); 10977d326930SKishon Vijay Abraham I goto err_put_sync; 10987d326930SKishon Vijay Abraham I } 10997d326930SKishon Vijay Abraham I 11007d326930SKishon Vijay Abraham I host->mmc_host_ops.get_ro = mmc_gpio_get_ro; 11017d326930SKishon Vijay Abraham I host->mmc_host_ops.start_signal_voltage_switch = 11027d326930SKishon Vijay Abraham I sdhci_omap_start_signal_voltage_switch; 11037d326930SKishon Vijay Abraham I host->mmc_host_ops.set_ios = sdhci_omap_set_ios; 110420ea26a1SKishon Vijay Abraham I host->mmc_host_ops.card_busy = sdhci_omap_card_busy; 11059fc2cd76SKishon Vijay Abraham I host->mmc_host_ops.execute_tuning = sdhci_omap_execute_tuning; 1106efde12b2SKishon Vijay Abraham I host->mmc_host_ops.enable_sdio_irq = sdhci_omap_enable_sdio_irq; 11077d326930SKishon Vijay Abraham I 11080ec4ee3cSKishon Vijay Abraham I ret = sdhci_setup_host(host); 11097d326930SKishon Vijay Abraham I if (ret) 11107d326930SKishon Vijay Abraham I goto err_put_sync; 11117d326930SKishon Vijay Abraham I 11120ec4ee3cSKishon Vijay Abraham I ret = sdhci_omap_config_iodelay_pinctrl_state(omap_host); 11130ec4ee3cSKishon Vijay Abraham I if (ret) 11140ec4ee3cSKishon Vijay Abraham I goto err_cleanup_host; 11150ec4ee3cSKishon Vijay Abraham I 11160ec4ee3cSKishon Vijay Abraham I ret = __sdhci_add_host(host); 11170ec4ee3cSKishon Vijay Abraham I if (ret) 11180ec4ee3cSKishon Vijay Abraham I goto err_cleanup_host; 11190ec4ee3cSKishon Vijay Abraham I 11207d326930SKishon Vijay Abraham I return 0; 11217d326930SKishon Vijay Abraham I 11220ec4ee3cSKishon Vijay Abraham I err_cleanup_host: 11230ec4ee3cSKishon Vijay Abraham I sdhci_cleanup_host(host); 11240ec4ee3cSKishon Vijay Abraham I 11257d326930SKishon Vijay Abraham I err_put_sync: 11267d326930SKishon Vijay Abraham I pm_runtime_put_sync(dev); 11277d326930SKishon Vijay Abraham I 11287d326930SKishon Vijay Abraham I err_rpm_disable: 11297d326930SKishon Vijay Abraham I pm_runtime_disable(dev); 11307d326930SKishon Vijay Abraham I 11317d326930SKishon Vijay Abraham I err_pltfm_free: 11327d326930SKishon Vijay Abraham I sdhci_pltfm_free(pdev); 11337d326930SKishon Vijay Abraham I return ret; 11347d326930SKishon Vijay Abraham I } 11357d326930SKishon Vijay Abraham I 11367d326930SKishon Vijay Abraham I static int sdhci_omap_remove(struct platform_device *pdev) 11377d326930SKishon Vijay Abraham I { 11387d326930SKishon Vijay Abraham I struct device *dev = &pdev->dev; 11397d326930SKishon Vijay Abraham I struct sdhci_host *host = platform_get_drvdata(pdev); 11407d326930SKishon Vijay Abraham I 11417d326930SKishon Vijay Abraham I sdhci_remove_host(host, true); 11427d326930SKishon Vijay Abraham I pm_runtime_put_sync(dev); 11437d326930SKishon Vijay Abraham I pm_runtime_disable(dev); 11447d326930SKishon Vijay Abraham I sdhci_pltfm_free(pdev); 11457d326930SKishon Vijay Abraham I 11467d326930SKishon Vijay Abraham I return 0; 11477d326930SKishon Vijay Abraham I } 11487d326930SKishon Vijay Abraham I 11497d326930SKishon Vijay Abraham I static struct platform_driver sdhci_omap_driver = { 11507d326930SKishon Vijay Abraham I .probe = sdhci_omap_probe, 11517d326930SKishon Vijay Abraham I .remove = sdhci_omap_remove, 11527d326930SKishon Vijay Abraham I .driver = { 11537d326930SKishon Vijay Abraham I .name = "sdhci-omap", 11547d326930SKishon Vijay Abraham I .of_match_table = omap_sdhci_match, 11557d326930SKishon Vijay Abraham I }, 11567d326930SKishon Vijay Abraham I }; 11577d326930SKishon Vijay Abraham I 11587d326930SKishon Vijay Abraham I module_platform_driver(sdhci_omap_driver); 11597d326930SKishon Vijay Abraham I 11607d326930SKishon Vijay Abraham I MODULE_DESCRIPTION("SDHCI driver for OMAP SoCs"); 11617d326930SKishon Vijay Abraham I MODULE_AUTHOR("Texas Instruments Inc."); 11627d326930SKishon Vijay Abraham I MODULE_LICENSE("GPL v2"); 11637d326930SKishon Vijay Abraham I MODULE_ALIAS("platform:sdhci_omap"); 1164