17d326930SKishon Vijay Abraham I /** 27d326930SKishon Vijay Abraham I * SDHCI Controller driver for TI's OMAP SoCs 37d326930SKishon Vijay Abraham I * 47d326930SKishon Vijay Abraham I * Copyright (C) 2017 Texas Instruments 57d326930SKishon Vijay Abraham I * Author: Kishon Vijay Abraham I <kishon@ti.com> 67d326930SKishon Vijay Abraham I * 77d326930SKishon Vijay Abraham I * This program is free software: you can redistribute it and/or modify 87d326930SKishon Vijay Abraham I * it under the terms of the GNU General Public License version 2 of 97d326930SKishon Vijay Abraham I * the License as published by the Free Software Foundation. 107d326930SKishon Vijay Abraham I * 117d326930SKishon Vijay Abraham I * This program is distributed in the hope that it will be useful, 127d326930SKishon Vijay Abraham I * but WITHOUT ANY WARRANTY; without even the implied warranty of 137d326930SKishon Vijay Abraham I * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 147d326930SKishon Vijay Abraham I * GNU General Public License for more details. 157d326930SKishon Vijay Abraham I * 167d326930SKishon Vijay Abraham I * You should have received a copy of the GNU General Public License 177d326930SKishon Vijay Abraham I * along with this program. If not, see <http://www.gnu.org/licenses/>. 187d326930SKishon Vijay Abraham I */ 197d326930SKishon Vijay Abraham I 207d326930SKishon Vijay Abraham I #include <linux/delay.h> 217d326930SKishon Vijay Abraham I #include <linux/mmc/slot-gpio.h> 227d326930SKishon Vijay Abraham I #include <linux/module.h> 237d326930SKishon Vijay Abraham I #include <linux/of.h> 247d326930SKishon Vijay Abraham I #include <linux/of_device.h> 257d326930SKishon Vijay Abraham I #include <linux/platform_device.h> 267d326930SKishon Vijay Abraham I #include <linux/pm_runtime.h> 277d326930SKishon Vijay Abraham I #include <linux/regulator/consumer.h> 287d326930SKishon Vijay Abraham I 297d326930SKishon Vijay Abraham I #include "sdhci-pltfm.h" 307d326930SKishon Vijay Abraham I 317d326930SKishon Vijay Abraham I #define SDHCI_OMAP_CON 0x12c 327d326930SKishon Vijay Abraham I #define CON_DW8 BIT(5) 337d326930SKishon Vijay Abraham I #define CON_DMA_MASTER BIT(20) 347d326930SKishon Vijay Abraham I #define CON_INIT BIT(1) 357d326930SKishon Vijay Abraham I #define CON_OD BIT(0) 367d326930SKishon Vijay Abraham I 377d326930SKishon Vijay Abraham I #define SDHCI_OMAP_CMD 0x20c 387d326930SKishon Vijay Abraham I 397d326930SKishon Vijay Abraham I #define SDHCI_OMAP_HCTL 0x228 407d326930SKishon Vijay Abraham I #define HCTL_SDBP BIT(8) 417d326930SKishon Vijay Abraham I #define HCTL_SDVS_SHIFT 9 427d326930SKishon Vijay Abraham I #define HCTL_SDVS_MASK (0x7 << HCTL_SDVS_SHIFT) 437d326930SKishon Vijay Abraham I #define HCTL_SDVS_33 (0x7 << HCTL_SDVS_SHIFT) 447d326930SKishon Vijay Abraham I #define HCTL_SDVS_30 (0x6 << HCTL_SDVS_SHIFT) 457d326930SKishon Vijay Abraham I #define HCTL_SDVS_18 (0x5 << HCTL_SDVS_SHIFT) 467d326930SKishon Vijay Abraham I 477d326930SKishon Vijay Abraham I #define SDHCI_OMAP_SYSCTL 0x22c 487d326930SKishon Vijay Abraham I #define SYSCTL_CEN BIT(2) 497d326930SKishon Vijay Abraham I #define SYSCTL_CLKD_SHIFT 6 507d326930SKishon Vijay Abraham I #define SYSCTL_CLKD_MASK 0x3ff 517d326930SKishon Vijay Abraham I 527d326930SKishon Vijay Abraham I #define SDHCI_OMAP_STAT 0x230 537d326930SKishon Vijay Abraham I 547d326930SKishon Vijay Abraham I #define SDHCI_OMAP_IE 0x234 557d326930SKishon Vijay Abraham I #define INT_CC_EN BIT(0) 567d326930SKishon Vijay Abraham I 577d326930SKishon Vijay Abraham I #define SDHCI_OMAP_AC12 0x23c 587d326930SKishon Vijay Abraham I #define AC12_V1V8_SIGEN BIT(19) 597d326930SKishon Vijay Abraham I 607d326930SKishon Vijay Abraham I #define SDHCI_OMAP_CAPA 0x240 617d326930SKishon Vijay Abraham I #define CAPA_VS33 BIT(24) 627d326930SKishon Vijay Abraham I #define CAPA_VS30 BIT(25) 637d326930SKishon Vijay Abraham I #define CAPA_VS18 BIT(26) 647d326930SKishon Vijay Abraham I 657d326930SKishon Vijay Abraham I #define SDHCI_OMAP_TIMEOUT 1 /* 1 msec */ 667d326930SKishon Vijay Abraham I 677d326930SKishon Vijay Abraham I #define SYSCTL_CLKD_MAX 0x3FF 687d326930SKishon Vijay Abraham I 697d326930SKishon Vijay Abraham I #define IOV_1V8 1800000 /* 180000 uV */ 707d326930SKishon Vijay Abraham I #define IOV_3V0 3000000 /* 300000 uV */ 717d326930SKishon Vijay Abraham I #define IOV_3V3 3300000 /* 330000 uV */ 727d326930SKishon Vijay Abraham I 737d326930SKishon Vijay Abraham I struct sdhci_omap_data { 747d326930SKishon Vijay Abraham I u32 offset; 757d326930SKishon Vijay Abraham I }; 767d326930SKishon Vijay Abraham I 777d326930SKishon Vijay Abraham I struct sdhci_omap_host { 787d326930SKishon Vijay Abraham I void __iomem *base; 797d326930SKishon Vijay Abraham I struct device *dev; 807d326930SKishon Vijay Abraham I struct regulator *pbias; 817d326930SKishon Vijay Abraham I bool pbias_enabled; 827d326930SKishon Vijay Abraham I struct sdhci_host *host; 837d326930SKishon Vijay Abraham I u8 bus_mode; 847d326930SKishon Vijay Abraham I u8 power_mode; 857d326930SKishon Vijay Abraham I }; 867d326930SKishon Vijay Abraham I 877d326930SKishon Vijay Abraham I static inline u32 sdhci_omap_readl(struct sdhci_omap_host *host, 887d326930SKishon Vijay Abraham I unsigned int offset) 897d326930SKishon Vijay Abraham I { 907d326930SKishon Vijay Abraham I return readl(host->base + offset); 917d326930SKishon Vijay Abraham I } 927d326930SKishon Vijay Abraham I 937d326930SKishon Vijay Abraham I static inline void sdhci_omap_writel(struct sdhci_omap_host *host, 947d326930SKishon Vijay Abraham I unsigned int offset, u32 data) 957d326930SKishon Vijay Abraham I { 967d326930SKishon Vijay Abraham I writel(data, host->base + offset); 977d326930SKishon Vijay Abraham I } 987d326930SKishon Vijay Abraham I 997d326930SKishon Vijay Abraham I static int sdhci_omap_set_pbias(struct sdhci_omap_host *omap_host, 1007d326930SKishon Vijay Abraham I bool power_on, unsigned int iov) 1017d326930SKishon Vijay Abraham I { 1027d326930SKishon Vijay Abraham I int ret; 1037d326930SKishon Vijay Abraham I struct device *dev = omap_host->dev; 1047d326930SKishon Vijay Abraham I 1057d326930SKishon Vijay Abraham I if (IS_ERR(omap_host->pbias)) 1067d326930SKishon Vijay Abraham I return 0; 1077d326930SKishon Vijay Abraham I 1087d326930SKishon Vijay Abraham I if (power_on) { 1097d326930SKishon Vijay Abraham I ret = regulator_set_voltage(omap_host->pbias, iov, iov); 1107d326930SKishon Vijay Abraham I if (ret) { 1117d326930SKishon Vijay Abraham I dev_err(dev, "pbias set voltage failed\n"); 1127d326930SKishon Vijay Abraham I return ret; 1137d326930SKishon Vijay Abraham I } 1147d326930SKishon Vijay Abraham I 1157d326930SKishon Vijay Abraham I if (omap_host->pbias_enabled) 1167d326930SKishon Vijay Abraham I return 0; 1177d326930SKishon Vijay Abraham I 1187d326930SKishon Vijay Abraham I ret = regulator_enable(omap_host->pbias); 1197d326930SKishon Vijay Abraham I if (ret) { 1207d326930SKishon Vijay Abraham I dev_err(dev, "pbias reg enable fail\n"); 1217d326930SKishon Vijay Abraham I return ret; 1227d326930SKishon Vijay Abraham I } 1237d326930SKishon Vijay Abraham I 1247d326930SKishon Vijay Abraham I omap_host->pbias_enabled = true; 1257d326930SKishon Vijay Abraham I } else { 1267d326930SKishon Vijay Abraham I if (!omap_host->pbias_enabled) 1277d326930SKishon Vijay Abraham I return 0; 1287d326930SKishon Vijay Abraham I 1297d326930SKishon Vijay Abraham I ret = regulator_disable(omap_host->pbias); 1307d326930SKishon Vijay Abraham I if (ret) { 1317d326930SKishon Vijay Abraham I dev_err(dev, "pbias reg disable fail\n"); 1327d326930SKishon Vijay Abraham I return ret; 1337d326930SKishon Vijay Abraham I } 1347d326930SKishon Vijay Abraham I omap_host->pbias_enabled = false; 1357d326930SKishon Vijay Abraham I } 1367d326930SKishon Vijay Abraham I 1377d326930SKishon Vijay Abraham I return 0; 1387d326930SKishon Vijay Abraham I } 1397d326930SKishon Vijay Abraham I 1407d326930SKishon Vijay Abraham I static int sdhci_omap_enable_iov(struct sdhci_omap_host *omap_host, 1417d326930SKishon Vijay Abraham I unsigned int iov) 1427d326930SKishon Vijay Abraham I { 1437d326930SKishon Vijay Abraham I int ret; 1447d326930SKishon Vijay Abraham I struct sdhci_host *host = omap_host->host; 1457d326930SKishon Vijay Abraham I struct mmc_host *mmc = host->mmc; 1467d326930SKishon Vijay Abraham I 1477d326930SKishon Vijay Abraham I ret = sdhci_omap_set_pbias(omap_host, false, 0); 1487d326930SKishon Vijay Abraham I if (ret) 1497d326930SKishon Vijay Abraham I return ret; 1507d326930SKishon Vijay Abraham I 1517d326930SKishon Vijay Abraham I if (!IS_ERR(mmc->supply.vqmmc)) { 1527d326930SKishon Vijay Abraham I ret = regulator_set_voltage(mmc->supply.vqmmc, iov, iov); 1537d326930SKishon Vijay Abraham I if (ret) { 1547d326930SKishon Vijay Abraham I dev_err(mmc_dev(mmc), "vqmmc set voltage failed\n"); 1557d326930SKishon Vijay Abraham I return ret; 1567d326930SKishon Vijay Abraham I } 1577d326930SKishon Vijay Abraham I } 1587d326930SKishon Vijay Abraham I 1597d326930SKishon Vijay Abraham I ret = sdhci_omap_set_pbias(omap_host, true, iov); 1607d326930SKishon Vijay Abraham I if (ret) 1617d326930SKishon Vijay Abraham I return ret; 1627d326930SKishon Vijay Abraham I 1637d326930SKishon Vijay Abraham I return 0; 1647d326930SKishon Vijay Abraham I } 1657d326930SKishon Vijay Abraham I 1667d326930SKishon Vijay Abraham I static void sdhci_omap_conf_bus_power(struct sdhci_omap_host *omap_host, 1677d326930SKishon Vijay Abraham I unsigned char signal_voltage) 1687d326930SKishon Vijay Abraham I { 1697d326930SKishon Vijay Abraham I u32 reg; 1707d326930SKishon Vijay Abraham I ktime_t timeout; 1717d326930SKishon Vijay Abraham I 1727d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_HCTL); 1737d326930SKishon Vijay Abraham I reg &= ~HCTL_SDVS_MASK; 1747d326930SKishon Vijay Abraham I 1757d326930SKishon Vijay Abraham I if (signal_voltage == MMC_SIGNAL_VOLTAGE_330) 1767d326930SKishon Vijay Abraham I reg |= HCTL_SDVS_33; 1777d326930SKishon Vijay Abraham I else 1787d326930SKishon Vijay Abraham I reg |= HCTL_SDVS_18; 1797d326930SKishon Vijay Abraham I 1807d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_HCTL, reg); 1817d326930SKishon Vijay Abraham I 1827d326930SKishon Vijay Abraham I reg |= HCTL_SDBP; 1837d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_HCTL, reg); 1847d326930SKishon Vijay Abraham I 1857d326930SKishon Vijay Abraham I /* wait 1ms */ 1867d326930SKishon Vijay Abraham I timeout = ktime_add_ms(ktime_get(), SDHCI_OMAP_TIMEOUT); 1877d326930SKishon Vijay Abraham I while (!(sdhci_omap_readl(omap_host, SDHCI_OMAP_HCTL) & HCTL_SDBP)) { 1887d326930SKishon Vijay Abraham I if (WARN_ON(ktime_after(ktime_get(), timeout))) 1897d326930SKishon Vijay Abraham I return; 1907d326930SKishon Vijay Abraham I usleep_range(5, 10); 1917d326930SKishon Vijay Abraham I } 1927d326930SKishon Vijay Abraham I } 1937d326930SKishon Vijay Abraham I 1947d326930SKishon Vijay Abraham I static int sdhci_omap_start_signal_voltage_switch(struct mmc_host *mmc, 1957d326930SKishon Vijay Abraham I struct mmc_ios *ios) 1967d326930SKishon Vijay Abraham I { 1977d326930SKishon Vijay Abraham I u32 reg; 1987d326930SKishon Vijay Abraham I int ret; 1997d326930SKishon Vijay Abraham I unsigned int iov; 2007d326930SKishon Vijay Abraham I struct sdhci_host *host = mmc_priv(mmc); 2017d326930SKishon Vijay Abraham I struct sdhci_pltfm_host *pltfm_host; 2027d326930SKishon Vijay Abraham I struct sdhci_omap_host *omap_host; 2037d326930SKishon Vijay Abraham I struct device *dev; 2047d326930SKishon Vijay Abraham I 2057d326930SKishon Vijay Abraham I pltfm_host = sdhci_priv(host); 2067d326930SKishon Vijay Abraham I omap_host = sdhci_pltfm_priv(pltfm_host); 2077d326930SKishon Vijay Abraham I dev = omap_host->dev; 2087d326930SKishon Vijay Abraham I 2097d326930SKishon Vijay Abraham I if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_330) { 2107d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CAPA); 2117d326930SKishon Vijay Abraham I if (!(reg & CAPA_VS33)) 2127d326930SKishon Vijay Abraham I return -EOPNOTSUPP; 2137d326930SKishon Vijay Abraham I 2147d326930SKishon Vijay Abraham I sdhci_omap_conf_bus_power(omap_host, ios->signal_voltage); 2157d326930SKishon Vijay Abraham I 2167d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_AC12); 2177d326930SKishon Vijay Abraham I reg &= ~AC12_V1V8_SIGEN; 2187d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_AC12, reg); 2197d326930SKishon Vijay Abraham I 2207d326930SKishon Vijay Abraham I iov = IOV_3V3; 2217d326930SKishon Vijay Abraham I } else if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_180) { 2227d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CAPA); 2237d326930SKishon Vijay Abraham I if (!(reg & CAPA_VS18)) 2247d326930SKishon Vijay Abraham I return -EOPNOTSUPP; 2257d326930SKishon Vijay Abraham I 2267d326930SKishon Vijay Abraham I sdhci_omap_conf_bus_power(omap_host, ios->signal_voltage); 2277d326930SKishon Vijay Abraham I 2287d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_AC12); 2297d326930SKishon Vijay Abraham I reg |= AC12_V1V8_SIGEN; 2307d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_AC12, reg); 2317d326930SKishon Vijay Abraham I 2327d326930SKishon Vijay Abraham I iov = IOV_1V8; 2337d326930SKishon Vijay Abraham I } else { 2347d326930SKishon Vijay Abraham I return -EOPNOTSUPP; 2357d326930SKishon Vijay Abraham I } 2367d326930SKishon Vijay Abraham I 2377d326930SKishon Vijay Abraham I ret = sdhci_omap_enable_iov(omap_host, iov); 2387d326930SKishon Vijay Abraham I if (ret) { 2397d326930SKishon Vijay Abraham I dev_err(dev, "failed to switch IO voltage to %dmV\n", iov); 2407d326930SKishon Vijay Abraham I return ret; 2417d326930SKishon Vijay Abraham I } 2427d326930SKishon Vijay Abraham I 2437d326930SKishon Vijay Abraham I dev_dbg(dev, "IO voltage switched to %dmV\n", iov); 2447d326930SKishon Vijay Abraham I return 0; 2457d326930SKishon Vijay Abraham I } 2467d326930SKishon Vijay Abraham I 2477d326930SKishon Vijay Abraham I static void sdhci_omap_set_bus_mode(struct sdhci_omap_host *omap_host, 2487d326930SKishon Vijay Abraham I unsigned int mode) 2497d326930SKishon Vijay Abraham I { 2507d326930SKishon Vijay Abraham I u32 reg; 2517d326930SKishon Vijay Abraham I 2527d326930SKishon Vijay Abraham I if (omap_host->bus_mode == mode) 2537d326930SKishon Vijay Abraham I return; 2547d326930SKishon Vijay Abraham I 2557d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CON); 2567d326930SKishon Vijay Abraham I if (mode == MMC_BUSMODE_OPENDRAIN) 2577d326930SKishon Vijay Abraham I reg |= CON_OD; 2587d326930SKishon Vijay Abraham I else 2597d326930SKishon Vijay Abraham I reg &= ~CON_OD; 2607d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_CON, reg); 2617d326930SKishon Vijay Abraham I 2627d326930SKishon Vijay Abraham I omap_host->bus_mode = mode; 2637d326930SKishon Vijay Abraham I } 2647d326930SKishon Vijay Abraham I 2657d326930SKishon Vijay Abraham I void sdhci_omap_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) 2667d326930SKishon Vijay Abraham I { 2677d326930SKishon Vijay Abraham I struct sdhci_host *host = mmc_priv(mmc); 2687d326930SKishon Vijay Abraham I struct sdhci_pltfm_host *pltfm_host; 2697d326930SKishon Vijay Abraham I struct sdhci_omap_host *omap_host; 2707d326930SKishon Vijay Abraham I 2717d326930SKishon Vijay Abraham I pltfm_host = sdhci_priv(host); 2727d326930SKishon Vijay Abraham I omap_host = sdhci_pltfm_priv(pltfm_host); 2737d326930SKishon Vijay Abraham I 2747d326930SKishon Vijay Abraham I sdhci_omap_set_bus_mode(omap_host, ios->bus_mode); 2757d326930SKishon Vijay Abraham I sdhci_set_ios(mmc, ios); 2767d326930SKishon Vijay Abraham I } 2777d326930SKishon Vijay Abraham I 2787d326930SKishon Vijay Abraham I static u16 sdhci_omap_calc_divisor(struct sdhci_pltfm_host *host, 2797d326930SKishon Vijay Abraham I unsigned int clock) 2807d326930SKishon Vijay Abraham I { 2817d326930SKishon Vijay Abraham I u16 dsor; 2827d326930SKishon Vijay Abraham I 2837d326930SKishon Vijay Abraham I dsor = DIV_ROUND_UP(clk_get_rate(host->clk), clock); 2847d326930SKishon Vijay Abraham I if (dsor > SYSCTL_CLKD_MAX) 2857d326930SKishon Vijay Abraham I dsor = SYSCTL_CLKD_MAX; 2867d326930SKishon Vijay Abraham I 2877d326930SKishon Vijay Abraham I return dsor; 2887d326930SKishon Vijay Abraham I } 2897d326930SKishon Vijay Abraham I 2907d326930SKishon Vijay Abraham I static void sdhci_omap_start_clock(struct sdhci_omap_host *omap_host) 2917d326930SKishon Vijay Abraham I { 2927d326930SKishon Vijay Abraham I u32 reg; 2937d326930SKishon Vijay Abraham I 2947d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_SYSCTL); 2957d326930SKishon Vijay Abraham I reg |= SYSCTL_CEN; 2967d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_SYSCTL, reg); 2977d326930SKishon Vijay Abraham I } 2987d326930SKishon Vijay Abraham I 2997d326930SKishon Vijay Abraham I static void sdhci_omap_stop_clock(struct sdhci_omap_host *omap_host) 3007d326930SKishon Vijay Abraham I { 3017d326930SKishon Vijay Abraham I u32 reg; 3027d326930SKishon Vijay Abraham I 3037d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_SYSCTL); 3047d326930SKishon Vijay Abraham I reg &= ~SYSCTL_CEN; 3057d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_SYSCTL, reg); 3067d326930SKishon Vijay Abraham I } 3077d326930SKishon Vijay Abraham I 3087d326930SKishon Vijay Abraham I static void sdhci_omap_set_clock(struct sdhci_host *host, unsigned int clock) 3097d326930SKishon Vijay Abraham I { 3107d326930SKishon Vijay Abraham I struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 3117d326930SKishon Vijay Abraham I struct sdhci_omap_host *omap_host = sdhci_pltfm_priv(pltfm_host); 3127d326930SKishon Vijay Abraham I unsigned long clkdiv; 3137d326930SKishon Vijay Abraham I 3147d326930SKishon Vijay Abraham I sdhci_omap_stop_clock(omap_host); 3157d326930SKishon Vijay Abraham I 3167d326930SKishon Vijay Abraham I if (!clock) 3177d326930SKishon Vijay Abraham I return; 3187d326930SKishon Vijay Abraham I 3197d326930SKishon Vijay Abraham I clkdiv = sdhci_omap_calc_divisor(pltfm_host, clock); 3207d326930SKishon Vijay Abraham I clkdiv = (clkdiv & SYSCTL_CLKD_MASK) << SYSCTL_CLKD_SHIFT; 3217d326930SKishon Vijay Abraham I sdhci_enable_clk(host, clkdiv); 3227d326930SKishon Vijay Abraham I 3237d326930SKishon Vijay Abraham I sdhci_omap_start_clock(omap_host); 3247d326930SKishon Vijay Abraham I } 3257d326930SKishon Vijay Abraham I 3267d326930SKishon Vijay Abraham I void sdhci_omap_set_power(struct sdhci_host *host, unsigned char mode, 3277d326930SKishon Vijay Abraham I unsigned short vdd) 3287d326930SKishon Vijay Abraham I { 3297d326930SKishon Vijay Abraham I struct mmc_host *mmc = host->mmc; 3307d326930SKishon Vijay Abraham I 3317d326930SKishon Vijay Abraham I mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, vdd); 3327d326930SKishon Vijay Abraham I } 3337d326930SKishon Vijay Abraham I 3347d326930SKishon Vijay Abraham I static int sdhci_omap_enable_dma(struct sdhci_host *host) 3357d326930SKishon Vijay Abraham I { 3367d326930SKishon Vijay Abraham I u32 reg; 3377d326930SKishon Vijay Abraham I struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 3387d326930SKishon Vijay Abraham I struct sdhci_omap_host *omap_host = sdhci_pltfm_priv(pltfm_host); 3397d326930SKishon Vijay Abraham I 3407d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CON); 3417d326930SKishon Vijay Abraham I reg |= CON_DMA_MASTER; 3427d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_CON, reg); 3437d326930SKishon Vijay Abraham I 3447d326930SKishon Vijay Abraham I return 0; 3457d326930SKishon Vijay Abraham I } 3467d326930SKishon Vijay Abraham I 3477d326930SKishon Vijay Abraham I unsigned int sdhci_omap_get_min_clock(struct sdhci_host *host) 3487d326930SKishon Vijay Abraham I { 3497d326930SKishon Vijay Abraham I struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 3507d326930SKishon Vijay Abraham I 3517d326930SKishon Vijay Abraham I return clk_get_rate(pltfm_host->clk) / SYSCTL_CLKD_MAX; 3527d326930SKishon Vijay Abraham I } 3537d326930SKishon Vijay Abraham I 3547d326930SKishon Vijay Abraham I static void sdhci_omap_set_bus_width(struct sdhci_host *host, int width) 3557d326930SKishon Vijay Abraham I { 3567d326930SKishon Vijay Abraham I struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 3577d326930SKishon Vijay Abraham I struct sdhci_omap_host *omap_host = sdhci_pltfm_priv(pltfm_host); 3587d326930SKishon Vijay Abraham I u32 reg; 3597d326930SKishon Vijay Abraham I 3607d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CON); 3617d326930SKishon Vijay Abraham I if (width == MMC_BUS_WIDTH_8) 3627d326930SKishon Vijay Abraham I reg |= CON_DW8; 3637d326930SKishon Vijay Abraham I else 3647d326930SKishon Vijay Abraham I reg &= ~CON_DW8; 3657d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_CON, reg); 3667d326930SKishon Vijay Abraham I 3677d326930SKishon Vijay Abraham I sdhci_set_bus_width(host, width); 3687d326930SKishon Vijay Abraham I } 3697d326930SKishon Vijay Abraham I 3707d326930SKishon Vijay Abraham I static void sdhci_omap_init_74_clocks(struct sdhci_host *host, u8 power_mode) 3717d326930SKishon Vijay Abraham I { 3727d326930SKishon Vijay Abraham I u32 reg; 3737d326930SKishon Vijay Abraham I ktime_t timeout; 3747d326930SKishon Vijay Abraham I struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 3757d326930SKishon Vijay Abraham I struct sdhci_omap_host *omap_host = sdhci_pltfm_priv(pltfm_host); 3767d326930SKishon Vijay Abraham I 3777d326930SKishon Vijay Abraham I if (omap_host->power_mode == power_mode) 3787d326930SKishon Vijay Abraham I return; 3797d326930SKishon Vijay Abraham I 3807d326930SKishon Vijay Abraham I if (power_mode != MMC_POWER_ON) 3817d326930SKishon Vijay Abraham I return; 3827d326930SKishon Vijay Abraham I 3837d326930SKishon Vijay Abraham I disable_irq(host->irq); 3847d326930SKishon Vijay Abraham I 3857d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CON); 3867d326930SKishon Vijay Abraham I reg |= CON_INIT; 3877d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_CON, reg); 3887d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_CMD, 0x0); 3897d326930SKishon Vijay Abraham I 3907d326930SKishon Vijay Abraham I /* wait 1ms */ 3917d326930SKishon Vijay Abraham I timeout = ktime_add_ms(ktime_get(), SDHCI_OMAP_TIMEOUT); 3927d326930SKishon Vijay Abraham I while (!(sdhci_omap_readl(omap_host, SDHCI_OMAP_STAT) & INT_CC_EN)) { 3937d326930SKishon Vijay Abraham I if (WARN_ON(ktime_after(ktime_get(), timeout))) 3947d326930SKishon Vijay Abraham I return; 3957d326930SKishon Vijay Abraham I usleep_range(5, 10); 3967d326930SKishon Vijay Abraham I } 3977d326930SKishon Vijay Abraham I 3987d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CON); 3997d326930SKishon Vijay Abraham I reg &= ~CON_INIT; 4007d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_CON, reg); 4017d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_STAT, INT_CC_EN); 4027d326930SKishon Vijay Abraham I 4037d326930SKishon Vijay Abraham I enable_irq(host->irq); 4047d326930SKishon Vijay Abraham I 4057d326930SKishon Vijay Abraham I omap_host->power_mode = power_mode; 4067d326930SKishon Vijay Abraham I } 4077d326930SKishon Vijay Abraham I 4087d326930SKishon Vijay Abraham I static struct sdhci_ops sdhci_omap_ops = { 4097d326930SKishon Vijay Abraham I .set_clock = sdhci_omap_set_clock, 4107d326930SKishon Vijay Abraham I .set_power = sdhci_omap_set_power, 4117d326930SKishon Vijay Abraham I .enable_dma = sdhci_omap_enable_dma, 4127d326930SKishon Vijay Abraham I .get_max_clock = sdhci_pltfm_clk_get_max_clock, 4137d326930SKishon Vijay Abraham I .get_min_clock = sdhci_omap_get_min_clock, 4147d326930SKishon Vijay Abraham I .set_bus_width = sdhci_omap_set_bus_width, 4157d326930SKishon Vijay Abraham I .platform_send_init_74_clocks = sdhci_omap_init_74_clocks, 4167d326930SKishon Vijay Abraham I .reset = sdhci_reset, 4177d326930SKishon Vijay Abraham I .set_uhs_signaling = sdhci_set_uhs_signaling, 4187d326930SKishon Vijay Abraham I }; 4197d326930SKishon Vijay Abraham I 4207d326930SKishon Vijay Abraham I static int sdhci_omap_set_capabilities(struct sdhci_omap_host *omap_host) 4217d326930SKishon Vijay Abraham I { 4227d326930SKishon Vijay Abraham I u32 reg; 4237d326930SKishon Vijay Abraham I int ret = 0; 4247d326930SKishon Vijay Abraham I struct device *dev = omap_host->dev; 4257d326930SKishon Vijay Abraham I struct regulator *vqmmc; 4267d326930SKishon Vijay Abraham I 4277d326930SKishon Vijay Abraham I vqmmc = regulator_get(dev, "vqmmc"); 4287d326930SKishon Vijay Abraham I if (IS_ERR(vqmmc)) { 4297d326930SKishon Vijay Abraham I ret = PTR_ERR(vqmmc); 4307d326930SKishon Vijay Abraham I goto reg_put; 4317d326930SKishon Vijay Abraham I } 4327d326930SKishon Vijay Abraham I 4337d326930SKishon Vijay Abraham I /* voltage capabilities might be set by boot loader, clear it */ 4347d326930SKishon Vijay Abraham I reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CAPA); 4357d326930SKishon Vijay Abraham I reg &= ~(CAPA_VS18 | CAPA_VS30 | CAPA_VS33); 4367d326930SKishon Vijay Abraham I 4377d326930SKishon Vijay Abraham I if (regulator_is_supported_voltage(vqmmc, IOV_3V3, IOV_3V3)) 4387d326930SKishon Vijay Abraham I reg |= CAPA_VS33; 4397d326930SKishon Vijay Abraham I if (regulator_is_supported_voltage(vqmmc, IOV_1V8, IOV_1V8)) 4407d326930SKishon Vijay Abraham I reg |= CAPA_VS18; 4417d326930SKishon Vijay Abraham I 4427d326930SKishon Vijay Abraham I sdhci_omap_writel(omap_host, SDHCI_OMAP_CAPA, reg); 4437d326930SKishon Vijay Abraham I 4447d326930SKishon Vijay Abraham I reg_put: 4457d326930SKishon Vijay Abraham I regulator_put(vqmmc); 4467d326930SKishon Vijay Abraham I 4477d326930SKishon Vijay Abraham I return ret; 4487d326930SKishon Vijay Abraham I } 4497d326930SKishon Vijay Abraham I 4507d326930SKishon Vijay Abraham I static const struct sdhci_pltfm_data sdhci_omap_pdata = { 4517d326930SKishon Vijay Abraham I .quirks = SDHCI_QUIRK_BROKEN_CARD_DETECTION | 4527d326930SKishon Vijay Abraham I SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK | 4537d326930SKishon Vijay Abraham I SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN | 4547d326930SKishon Vijay Abraham I SDHCI_QUIRK_NO_HISPD_BIT | 4557d326930SKishon Vijay Abraham I SDHCI_QUIRK_BROKEN_ADMA_ZEROLEN_DESC, 4567d326930SKishon Vijay Abraham I .quirks2 = SDHCI_QUIRK2_NO_1_8_V | 4577d326930SKishon Vijay Abraham I SDHCI_QUIRK2_ACMD23_BROKEN | 4587d326930SKishon Vijay Abraham I SDHCI_QUIRK2_RSP_136_HAS_CRC, 4597d326930SKishon Vijay Abraham I .ops = &sdhci_omap_ops, 4607d326930SKishon Vijay Abraham I }; 4617d326930SKishon Vijay Abraham I 4627d326930SKishon Vijay Abraham I static const struct sdhci_omap_data dra7_data = { 4637d326930SKishon Vijay Abraham I .offset = 0x200, 4647d326930SKishon Vijay Abraham I }; 4657d326930SKishon Vijay Abraham I 4667d326930SKishon Vijay Abraham I static const struct of_device_id omap_sdhci_match[] = { 4677d326930SKishon Vijay Abraham I { .compatible = "ti,dra7-sdhci", .data = &dra7_data }, 4687d326930SKishon Vijay Abraham I {}, 4697d326930SKishon Vijay Abraham I }; 4707d326930SKishon Vijay Abraham I MODULE_DEVICE_TABLE(of, omap_sdhci_match); 4717d326930SKishon Vijay Abraham I 4727d326930SKishon Vijay Abraham I static int sdhci_omap_probe(struct platform_device *pdev) 4737d326930SKishon Vijay Abraham I { 4747d326930SKishon Vijay Abraham I int ret; 4757d326930SKishon Vijay Abraham I u32 offset; 4767d326930SKishon Vijay Abraham I struct device *dev = &pdev->dev; 4777d326930SKishon Vijay Abraham I struct sdhci_host *host; 4787d326930SKishon Vijay Abraham I struct sdhci_pltfm_host *pltfm_host; 4797d326930SKishon Vijay Abraham I struct sdhci_omap_host *omap_host; 4807d326930SKishon Vijay Abraham I struct mmc_host *mmc; 4817d326930SKishon Vijay Abraham I const struct of_device_id *match; 4827d326930SKishon Vijay Abraham I struct sdhci_omap_data *data; 4837d326930SKishon Vijay Abraham I 4847d326930SKishon Vijay Abraham I match = of_match_device(omap_sdhci_match, dev); 4857d326930SKishon Vijay Abraham I if (!match) 4867d326930SKishon Vijay Abraham I return -EINVAL; 4877d326930SKishon Vijay Abraham I 4887d326930SKishon Vijay Abraham I data = (struct sdhci_omap_data *)match->data; 4897d326930SKishon Vijay Abraham I if (!data) { 4907d326930SKishon Vijay Abraham I dev_err(dev, "no sdhci omap data\n"); 4917d326930SKishon Vijay Abraham I return -EINVAL; 4927d326930SKishon Vijay Abraham I } 4937d326930SKishon Vijay Abraham I offset = data->offset; 4947d326930SKishon Vijay Abraham I 4957d326930SKishon Vijay Abraham I host = sdhci_pltfm_init(pdev, &sdhci_omap_pdata, 4967d326930SKishon Vijay Abraham I sizeof(*omap_host)); 4977d326930SKishon Vijay Abraham I if (IS_ERR(host)) { 4987d326930SKishon Vijay Abraham I dev_err(dev, "Failed sdhci_pltfm_init\n"); 4997d326930SKishon Vijay Abraham I return PTR_ERR(host); 5007d326930SKishon Vijay Abraham I } 5017d326930SKishon Vijay Abraham I 5027d326930SKishon Vijay Abraham I pltfm_host = sdhci_priv(host); 5037d326930SKishon Vijay Abraham I omap_host = sdhci_pltfm_priv(pltfm_host); 5047d326930SKishon Vijay Abraham I omap_host->host = host; 5057d326930SKishon Vijay Abraham I omap_host->base = host->ioaddr; 5067d326930SKishon Vijay Abraham I omap_host->dev = dev; 5077d326930SKishon Vijay Abraham I host->ioaddr += offset; 5087d326930SKishon Vijay Abraham I 5097d326930SKishon Vijay Abraham I mmc = host->mmc; 5107d326930SKishon Vijay Abraham I ret = mmc_of_parse(mmc); 5117d326930SKishon Vijay Abraham I if (ret) 5127d326930SKishon Vijay Abraham I goto err_pltfm_free; 5137d326930SKishon Vijay Abraham I 5147d326930SKishon Vijay Abraham I pltfm_host->clk = devm_clk_get(dev, "fck"); 5157d326930SKishon Vijay Abraham I if (IS_ERR(pltfm_host->clk)) { 5167d326930SKishon Vijay Abraham I ret = PTR_ERR(pltfm_host->clk); 5177d326930SKishon Vijay Abraham I goto err_pltfm_free; 5187d326930SKishon Vijay Abraham I } 5197d326930SKishon Vijay Abraham I 5207d326930SKishon Vijay Abraham I ret = clk_set_rate(pltfm_host->clk, mmc->f_max); 5217d326930SKishon Vijay Abraham I if (ret) { 5227d326930SKishon Vijay Abraham I dev_err(dev, "failed to set clock to %d\n", mmc->f_max); 5237d326930SKishon Vijay Abraham I goto err_pltfm_free; 5247d326930SKishon Vijay Abraham I } 5257d326930SKishon Vijay Abraham I 5267d326930SKishon Vijay Abraham I omap_host->pbias = devm_regulator_get_optional(dev, "pbias"); 5277d326930SKishon Vijay Abraham I if (IS_ERR(omap_host->pbias)) { 5287d326930SKishon Vijay Abraham I ret = PTR_ERR(omap_host->pbias); 5297d326930SKishon Vijay Abraham I if (ret != -ENODEV) 5307d326930SKishon Vijay Abraham I goto err_pltfm_free; 5317d326930SKishon Vijay Abraham I dev_dbg(dev, "unable to get pbias regulator %d\n", ret); 5327d326930SKishon Vijay Abraham I } 5337d326930SKishon Vijay Abraham I omap_host->pbias_enabled = false; 5347d326930SKishon Vijay Abraham I 5357d326930SKishon Vijay Abraham I /* 5367d326930SKishon Vijay Abraham I * omap_device_pm_domain has callbacks to enable the main 5377d326930SKishon Vijay Abraham I * functional clock, interface clock and also configure the 5387d326930SKishon Vijay Abraham I * SYSCONFIG register of omap devices. The callback will be invoked 5397d326930SKishon Vijay Abraham I * as part of pm_runtime_get_sync. 5407d326930SKishon Vijay Abraham I */ 5417d326930SKishon Vijay Abraham I pm_runtime_enable(dev); 5427d326930SKishon Vijay Abraham I ret = pm_runtime_get_sync(dev); 5437d326930SKishon Vijay Abraham I if (ret < 0) { 5447d326930SKishon Vijay Abraham I dev_err(dev, "pm_runtime_get_sync failed\n"); 5457d326930SKishon Vijay Abraham I pm_runtime_put_noidle(dev); 5467d326930SKishon Vijay Abraham I goto err_rpm_disable; 5477d326930SKishon Vijay Abraham I } 5487d326930SKishon Vijay Abraham I 5497d326930SKishon Vijay Abraham I ret = sdhci_omap_set_capabilities(omap_host); 5507d326930SKishon Vijay Abraham I if (ret) { 5517d326930SKishon Vijay Abraham I dev_err(dev, "failed to set system capabilities\n"); 5527d326930SKishon Vijay Abraham I goto err_put_sync; 5537d326930SKishon Vijay Abraham I } 5547d326930SKishon Vijay Abraham I 5557d326930SKishon Vijay Abraham I host->mmc_host_ops.get_ro = mmc_gpio_get_ro; 5567d326930SKishon Vijay Abraham I host->mmc_host_ops.start_signal_voltage_switch = 5577d326930SKishon Vijay Abraham I sdhci_omap_start_signal_voltage_switch; 5587d326930SKishon Vijay Abraham I host->mmc_host_ops.set_ios = sdhci_omap_set_ios; 5597d326930SKishon Vijay Abraham I 5607d326930SKishon Vijay Abraham I sdhci_read_caps(host); 5617d326930SKishon Vijay Abraham I host->caps |= SDHCI_CAN_DO_ADMA2; 5627d326930SKishon Vijay Abraham I 5637d326930SKishon Vijay Abraham I ret = sdhci_add_host(host); 5647d326930SKishon Vijay Abraham I if (ret) 5657d326930SKishon Vijay Abraham I goto err_put_sync; 5667d326930SKishon Vijay Abraham I 5677d326930SKishon Vijay Abraham I return 0; 5687d326930SKishon Vijay Abraham I 5697d326930SKishon Vijay Abraham I err_put_sync: 5707d326930SKishon Vijay Abraham I pm_runtime_put_sync(dev); 5717d326930SKishon Vijay Abraham I 5727d326930SKishon Vijay Abraham I err_rpm_disable: 5737d326930SKishon Vijay Abraham I pm_runtime_disable(dev); 5747d326930SKishon Vijay Abraham I 5757d326930SKishon Vijay Abraham I err_pltfm_free: 5767d326930SKishon Vijay Abraham I sdhci_pltfm_free(pdev); 5777d326930SKishon Vijay Abraham I return ret; 5787d326930SKishon Vijay Abraham I } 5797d326930SKishon Vijay Abraham I 5807d326930SKishon Vijay Abraham I static int sdhci_omap_remove(struct platform_device *pdev) 5817d326930SKishon Vijay Abraham I { 5827d326930SKishon Vijay Abraham I struct device *dev = &pdev->dev; 5837d326930SKishon Vijay Abraham I struct sdhci_host *host = platform_get_drvdata(pdev); 5847d326930SKishon Vijay Abraham I 5857d326930SKishon Vijay Abraham I sdhci_remove_host(host, true); 5867d326930SKishon Vijay Abraham I pm_runtime_put_sync(dev); 5877d326930SKishon Vijay Abraham I pm_runtime_disable(dev); 5887d326930SKishon Vijay Abraham I sdhci_pltfm_free(pdev); 5897d326930SKishon Vijay Abraham I 5907d326930SKishon Vijay Abraham I return 0; 5917d326930SKishon Vijay Abraham I } 5927d326930SKishon Vijay Abraham I 5937d326930SKishon Vijay Abraham I static struct platform_driver sdhci_omap_driver = { 5947d326930SKishon Vijay Abraham I .probe = sdhci_omap_probe, 5957d326930SKishon Vijay Abraham I .remove = sdhci_omap_remove, 5967d326930SKishon Vijay Abraham I .driver = { 5977d326930SKishon Vijay Abraham I .name = "sdhci-omap", 5987d326930SKishon Vijay Abraham I .of_match_table = omap_sdhci_match, 5997d326930SKishon Vijay Abraham I }, 6007d326930SKishon Vijay Abraham I }; 6017d326930SKishon Vijay Abraham I 6027d326930SKishon Vijay Abraham I module_platform_driver(sdhci_omap_driver); 6037d326930SKishon Vijay Abraham I 6047d326930SKishon Vijay Abraham I MODULE_DESCRIPTION("SDHCI driver for OMAP SoCs"); 6057d326930SKishon Vijay Abraham I MODULE_AUTHOR("Texas Instruments Inc."); 6067d326930SKishon Vijay Abraham I MODULE_LICENSE("GPL v2"); 6077d326930SKishon Vijay Abraham I MODULE_ALIAS("platform:sdhci_omap"); 608