10d1bb41aSBen Dooks /* linux/drivers/mmc/host/sdhci-s3c.c 20d1bb41aSBen Dooks * 30d1bb41aSBen Dooks * Copyright 2008 Openmoko Inc. 40d1bb41aSBen Dooks * Copyright 2008 Simtec Electronics 50d1bb41aSBen Dooks * Ben Dooks <ben@simtec.co.uk> 60d1bb41aSBen Dooks * http://armlinux.simtec.co.uk/ 70d1bb41aSBen Dooks * 80d1bb41aSBen Dooks * SDHCI (HSMMC) support for Samsung SoC 90d1bb41aSBen Dooks * 100d1bb41aSBen Dooks * This program is free software; you can redistribute it and/or modify 110d1bb41aSBen Dooks * it under the terms of the GNU General Public License version 2 as 120d1bb41aSBen Dooks * published by the Free Software Foundation. 130d1bb41aSBen Dooks */ 140d1bb41aSBen Dooks 150d1bb41aSBen Dooks #include <linux/delay.h> 160d1bb41aSBen Dooks #include <linux/dma-mapping.h> 170d1bb41aSBen Dooks #include <linux/platform_device.h> 18cc014f3eSArnd Bergmann #include <linux/platform_data/mmc-sdhci-s3c.h> 195a0e3ad6STejun Heo #include <linux/slab.h> 200d1bb41aSBen Dooks #include <linux/clk.h> 210d1bb41aSBen Dooks #include <linux/io.h> 2217866e14SMarek Szyprowski #include <linux/gpio.h> 2355156d24SMark Brown #include <linux/module.h> 24d5e9c02cSMark Brown #include <linux/of.h> 25d5e9c02cSMark Brown #include <linux/of_gpio.h> 26d5e9c02cSMark Brown #include <linux/pm.h> 279f4e8151SMark Brown #include <linux/pm_runtime.h> 280d1bb41aSBen Dooks 290d1bb41aSBen Dooks #include <linux/mmc/host.h> 300d1bb41aSBen Dooks 31cc014f3eSArnd Bergmann #include "sdhci-s3c-regs.h" 320d1bb41aSBen Dooks #include "sdhci.h" 330d1bb41aSBen Dooks 340d1bb41aSBen Dooks #define MAX_BUS_CLK (4) 350d1bb41aSBen Dooks 36cd1b00ebSThomas Abraham /* Number of gpio's used is max data bus width + command and clock lines */ 37cd1b00ebSThomas Abraham #define NUM_GPIOS(x) (x + 2) 38cd1b00ebSThomas Abraham 390d1bb41aSBen Dooks /** 400d1bb41aSBen Dooks * struct sdhci_s3c - S3C SDHCI instance 410d1bb41aSBen Dooks * @host: The SDHCI host created 420d1bb41aSBen Dooks * @pdev: The platform device we where created from. 430d1bb41aSBen Dooks * @ioarea: The resource created when we claimed the IO area. 440d1bb41aSBen Dooks * @pdata: The platform data for this controller. 450d1bb41aSBen Dooks * @cur_clk: The index of the current bus clock. 460d1bb41aSBen Dooks * @clk_io: The clock for the internal bus interface. 470d1bb41aSBen Dooks * @clk_bus: The clocks that are available for the SD/MMC bus clock. 480d1bb41aSBen Dooks */ 490d1bb41aSBen Dooks struct sdhci_s3c { 500d1bb41aSBen Dooks struct sdhci_host *host; 510d1bb41aSBen Dooks struct platform_device *pdev; 520d1bb41aSBen Dooks struct resource *ioarea; 530d1bb41aSBen Dooks struct s3c_sdhci_platdata *pdata; 540d1bb41aSBen Dooks unsigned int cur_clk; 5517866e14SMarek Szyprowski int ext_cd_irq; 5617866e14SMarek Szyprowski int ext_cd_gpio; 570d1bb41aSBen Dooks 580d1bb41aSBen Dooks struct clk *clk_io; 590d1bb41aSBen Dooks struct clk *clk_bus[MAX_BUS_CLK]; 606eb28bdcSTomasz Figa unsigned long clk_rates[MAX_BUS_CLK]; 610d1bb41aSBen Dooks }; 620d1bb41aSBen Dooks 633119936aSThomas Abraham /** 643119936aSThomas Abraham * struct sdhci_s3c_driver_data - S3C SDHCI platform specific driver data 653119936aSThomas Abraham * @sdhci_quirks: sdhci host specific quirks. 663119936aSThomas Abraham * 673119936aSThomas Abraham * Specifies platform specific configuration of sdhci controller. 683119936aSThomas Abraham * Note: A structure for driver specific platform data is used for future 693119936aSThomas Abraham * expansion of its usage. 703119936aSThomas Abraham */ 713119936aSThomas Abraham struct sdhci_s3c_drv_data { 723119936aSThomas Abraham unsigned int sdhci_quirks; 733119936aSThomas Abraham }; 743119936aSThomas Abraham 750d1bb41aSBen Dooks static inline struct sdhci_s3c *to_s3c(struct sdhci_host *host) 760d1bb41aSBen Dooks { 770d1bb41aSBen Dooks return sdhci_priv(host); 780d1bb41aSBen Dooks } 790d1bb41aSBen Dooks 800d1bb41aSBen Dooks /** 810d1bb41aSBen Dooks * get_curclk - convert ctrl2 register to clock source number 820d1bb41aSBen Dooks * @ctrl2: Control2 register value. 830d1bb41aSBen Dooks */ 840d1bb41aSBen Dooks static u32 get_curclk(u32 ctrl2) 850d1bb41aSBen Dooks { 860d1bb41aSBen Dooks ctrl2 &= S3C_SDHCI_CTRL2_SELBASECLK_MASK; 870d1bb41aSBen Dooks ctrl2 >>= S3C_SDHCI_CTRL2_SELBASECLK_SHIFT; 880d1bb41aSBen Dooks 890d1bb41aSBen Dooks return ctrl2; 900d1bb41aSBen Dooks } 910d1bb41aSBen Dooks 920d1bb41aSBen Dooks static void sdhci_s3c_check_sclk(struct sdhci_host *host) 930d1bb41aSBen Dooks { 940d1bb41aSBen Dooks struct sdhci_s3c *ourhost = to_s3c(host); 950d1bb41aSBen Dooks u32 tmp = readl(host->ioaddr + S3C_SDHCI_CONTROL2); 960d1bb41aSBen Dooks 970d1bb41aSBen Dooks if (get_curclk(tmp) != ourhost->cur_clk) { 980d1bb41aSBen Dooks dev_dbg(&ourhost->pdev->dev, "restored ctrl2 clock setting\n"); 990d1bb41aSBen Dooks 1000d1bb41aSBen Dooks tmp &= ~S3C_SDHCI_CTRL2_SELBASECLK_MASK; 1010d1bb41aSBen Dooks tmp |= ourhost->cur_clk << S3C_SDHCI_CTRL2_SELBASECLK_SHIFT; 1027003fecbSJingoo Han writel(tmp, host->ioaddr + S3C_SDHCI_CONTROL2); 1030d1bb41aSBen Dooks } 1040d1bb41aSBen Dooks } 1050d1bb41aSBen Dooks 1060d1bb41aSBen Dooks /** 1070d1bb41aSBen Dooks * sdhci_s3c_get_max_clk - callback to get maximum clock frequency. 1080d1bb41aSBen Dooks * @host: The SDHCI host instance. 1090d1bb41aSBen Dooks * 1100d1bb41aSBen Dooks * Callback to return the maximum clock rate acheivable by the controller. 1110d1bb41aSBen Dooks */ 1120d1bb41aSBen Dooks static unsigned int sdhci_s3c_get_max_clk(struct sdhci_host *host) 1130d1bb41aSBen Dooks { 1140d1bb41aSBen Dooks struct sdhci_s3c *ourhost = to_s3c(host); 115222a13c5STomasz Figa unsigned long rate, max = 0; 116222a13c5STomasz Figa int src; 1170d1bb41aSBen Dooks 1180d1bb41aSBen Dooks /* note, a reset will reset the clock source */ 1190d1bb41aSBen Dooks 1200d1bb41aSBen Dooks sdhci_s3c_check_sclk(host); 1210d1bb41aSBen Dooks 1220d1bb41aSBen Dooks 123222a13c5STomasz Figa for (src = 0; src < MAX_BUS_CLK; src++) { 124222a13c5STomasz Figa rate = ourhost->clk_rates[src]; 1250d1bb41aSBen Dooks if (rate > max) 1260d1bb41aSBen Dooks max = rate; 1270d1bb41aSBen Dooks } 1280d1bb41aSBen Dooks 1290d1bb41aSBen Dooks return max; 1300d1bb41aSBen Dooks } 1310d1bb41aSBen Dooks 1320d1bb41aSBen Dooks /** 1330d1bb41aSBen Dooks * sdhci_s3c_consider_clock - consider one the bus clocks for current setting 1340d1bb41aSBen Dooks * @ourhost: Our SDHCI instance. 1350d1bb41aSBen Dooks * @src: The source clock index. 1360d1bb41aSBen Dooks * @wanted: The clock frequency wanted. 1370d1bb41aSBen Dooks */ 1380d1bb41aSBen Dooks static unsigned int sdhci_s3c_consider_clock(struct sdhci_s3c *ourhost, 1390d1bb41aSBen Dooks unsigned int src, 1400d1bb41aSBen Dooks unsigned int wanted) 1410d1bb41aSBen Dooks { 1420d1bb41aSBen Dooks unsigned long rate; 1430d1bb41aSBen Dooks struct clk *clksrc = ourhost->clk_bus[src]; 1448880a4a5STomasz Figa int shift; 1450d1bb41aSBen Dooks 1468f4b78d9STomasz Figa if (IS_ERR(clksrc)) 1470d1bb41aSBen Dooks return UINT_MAX; 1480d1bb41aSBen Dooks 149253e0a7cSJeongbae Seo /* 1503119936aSThomas Abraham * If controller uses a non-standard clock division, find the best clock 1513119936aSThomas Abraham * speed possible with selected clock source and skip the division. 152253e0a7cSJeongbae Seo */ 1533119936aSThomas Abraham if (ourhost->host->quirks & SDHCI_QUIRK_NONSTANDARD_CLOCK) { 154253e0a7cSJeongbae Seo rate = clk_round_rate(clksrc, wanted); 155253e0a7cSJeongbae Seo return wanted - rate; 156253e0a7cSJeongbae Seo } 157253e0a7cSJeongbae Seo 1586eb28bdcSTomasz Figa rate = ourhost->clk_rates[src]; 1590d1bb41aSBen Dooks 1608880a4a5STomasz Figa for (shift = 0; shift < 8; ++shift) { 1618880a4a5STomasz Figa if ((rate >> shift) <= wanted) 1620d1bb41aSBen Dooks break; 1630d1bb41aSBen Dooks } 1640d1bb41aSBen Dooks 1650d1bb41aSBen Dooks dev_dbg(&ourhost->pdev->dev, "clk %d: rate %ld, want %d, got %ld\n", 1668880a4a5STomasz Figa src, rate, wanted, rate >> shift); 1670d1bb41aSBen Dooks 1688880a4a5STomasz Figa return wanted - (rate >> shift); 1690d1bb41aSBen Dooks } 1700d1bb41aSBen Dooks 1710d1bb41aSBen Dooks /** 1720d1bb41aSBen Dooks * sdhci_s3c_set_clock - callback on clock change 1730d1bb41aSBen Dooks * @host: The SDHCI host being changed 1740d1bb41aSBen Dooks * @clock: The clock rate being requested. 1750d1bb41aSBen Dooks * 1760d1bb41aSBen Dooks * When the card's clock is going to be changed, look at the new frequency 1770d1bb41aSBen Dooks * and find the best clock source to go with it. 1780d1bb41aSBen Dooks */ 1790d1bb41aSBen Dooks static void sdhci_s3c_set_clock(struct sdhci_host *host, unsigned int clock) 1800d1bb41aSBen Dooks { 1810d1bb41aSBen Dooks struct sdhci_s3c *ourhost = to_s3c(host); 1820d1bb41aSBen Dooks unsigned int best = UINT_MAX; 1830d1bb41aSBen Dooks unsigned int delta; 1840d1bb41aSBen Dooks int best_src = 0; 1850d1bb41aSBen Dooks int src; 1860d1bb41aSBen Dooks u32 ctrl; 1870d1bb41aSBen Dooks 1880d1bb41aSBen Dooks /* don't bother if the clock is going off. */ 1890d1bb41aSBen Dooks if (clock == 0) 1900d1bb41aSBen Dooks return; 1910d1bb41aSBen Dooks 1920d1bb41aSBen Dooks for (src = 0; src < MAX_BUS_CLK; src++) { 1930d1bb41aSBen Dooks delta = sdhci_s3c_consider_clock(ourhost, src, clock); 1940d1bb41aSBen Dooks if (delta < best) { 1950d1bb41aSBen Dooks best = delta; 1960d1bb41aSBen Dooks best_src = src; 1970d1bb41aSBen Dooks } 1980d1bb41aSBen Dooks } 1990d1bb41aSBen Dooks 2000d1bb41aSBen Dooks dev_dbg(&ourhost->pdev->dev, 2010d1bb41aSBen Dooks "selected source %d, clock %d, delta %d\n", 2020d1bb41aSBen Dooks best_src, clock, best); 2030d1bb41aSBen Dooks 2040d1bb41aSBen Dooks /* select the new clock source */ 2050d1bb41aSBen Dooks if (ourhost->cur_clk != best_src) { 2060d1bb41aSBen Dooks struct clk *clk = ourhost->clk_bus[best_src]; 2070d1bb41aSBen Dooks 2080f310a05SThomas Abraham clk_prepare_enable(clk); 2090f310a05SThomas Abraham clk_disable_unprepare(ourhost->clk_bus[ourhost->cur_clk]); 210e684c468SChander Kashyap 2110d1bb41aSBen Dooks /* turn clock off to card before changing clock source */ 2120d1bb41aSBen Dooks writew(0, host->ioaddr + SDHCI_CLOCK_CONTROL); 2130d1bb41aSBen Dooks 2140d1bb41aSBen Dooks ourhost->cur_clk = best_src; 2156eb28bdcSTomasz Figa host->max_clk = ourhost->clk_rates[best_src]; 2160d1bb41aSBen Dooks 2170d1bb41aSBen Dooks ctrl = readl(host->ioaddr + S3C_SDHCI_CONTROL2); 2180d1bb41aSBen Dooks ctrl &= ~S3C_SDHCI_CTRL2_SELBASECLK_MASK; 2190d1bb41aSBen Dooks ctrl |= best_src << S3C_SDHCI_CTRL2_SELBASECLK_SHIFT; 2200d1bb41aSBen Dooks writel(ctrl, host->ioaddr + S3C_SDHCI_CONTROL2); 2210d1bb41aSBen Dooks } 2220d1bb41aSBen Dooks 2236fe47179SThomas Abraham /* reprogram default hardware configuration */ 2246fe47179SThomas Abraham writel(S3C64XX_SDHCI_CONTROL4_DRIVE_9mA, 2256fe47179SThomas Abraham host->ioaddr + S3C64XX_SDHCI_CONTROL4); 2260d1bb41aSBen Dooks 2276fe47179SThomas Abraham ctrl = readl(host->ioaddr + S3C_SDHCI_CONTROL2); 2286fe47179SThomas Abraham ctrl |= (S3C64XX_SDHCI_CTRL2_ENSTAASYNCCLR | 2296fe47179SThomas Abraham S3C64XX_SDHCI_CTRL2_ENCMDCNFMSK | 2306fe47179SThomas Abraham S3C_SDHCI_CTRL2_ENFBCLKRX | 2316fe47179SThomas Abraham S3C_SDHCI_CTRL2_DFCNT_NONE | 2326fe47179SThomas Abraham S3C_SDHCI_CTRL2_ENCLKOUTHOLD); 2336fe47179SThomas Abraham writel(ctrl, host->ioaddr + S3C_SDHCI_CONTROL2); 2340d1bb41aSBen Dooks 2356fe47179SThomas Abraham /* reconfigure the controller for new clock rate */ 2366fe47179SThomas Abraham ctrl = (S3C_SDHCI_CTRL3_FCSEL1 | S3C_SDHCI_CTRL3_FCSEL0); 2376fe47179SThomas Abraham if (clock < 25 * 1000000) 2386fe47179SThomas Abraham ctrl |= (S3C_SDHCI_CTRL3_FCSEL3 | S3C_SDHCI_CTRL3_FCSEL2); 2396fe47179SThomas Abraham writel(ctrl, host->ioaddr + S3C_SDHCI_CONTROL3); 2400d1bb41aSBen Dooks } 2410d1bb41aSBen Dooks 242ce5f036bSMarek Szyprowski /** 243ce5f036bSMarek Szyprowski * sdhci_s3c_get_min_clock - callback to get minimal supported clock value 244ce5f036bSMarek Szyprowski * @host: The SDHCI host being queried 245ce5f036bSMarek Szyprowski * 246ce5f036bSMarek Szyprowski * To init mmc host properly a minimal clock value is needed. For high system 247ce5f036bSMarek Szyprowski * bus clock's values the standard formula gives values out of allowed range. 248ce5f036bSMarek Szyprowski * The clock still can be set to lower values, if clock source other then 249ce5f036bSMarek Szyprowski * system bus is selected. 250ce5f036bSMarek Szyprowski */ 251ce5f036bSMarek Szyprowski static unsigned int sdhci_s3c_get_min_clock(struct sdhci_host *host) 252ce5f036bSMarek Szyprowski { 253ce5f036bSMarek Szyprowski struct sdhci_s3c *ourhost = to_s3c(host); 254222a13c5STomasz Figa unsigned long rate, min = ULONG_MAX; 255ce5f036bSMarek Szyprowski int src; 256ce5f036bSMarek Szyprowski 257ce5f036bSMarek Szyprowski for (src = 0; src < MAX_BUS_CLK; src++) { 258222a13c5STomasz Figa rate = ourhost->clk_rates[src] / 256; 259222a13c5STomasz Figa if (!rate) 260ce5f036bSMarek Szyprowski continue; 261222a13c5STomasz Figa if (rate < min) 262222a13c5STomasz Figa min = rate; 263ce5f036bSMarek Szyprowski } 264222a13c5STomasz Figa 265ce5f036bSMarek Szyprowski return min; 266ce5f036bSMarek Szyprowski } 267ce5f036bSMarek Szyprowski 268253e0a7cSJeongbae Seo /* sdhci_cmu_get_max_clk - callback to get maximum clock frequency.*/ 269253e0a7cSJeongbae Seo static unsigned int sdhci_cmu_get_max_clock(struct sdhci_host *host) 270253e0a7cSJeongbae Seo { 271253e0a7cSJeongbae Seo struct sdhci_s3c *ourhost = to_s3c(host); 272222a13c5STomasz Figa unsigned long rate, max = 0; 273222a13c5STomasz Figa int src; 274253e0a7cSJeongbae Seo 275222a13c5STomasz Figa for (src = 0; src < MAX_BUS_CLK; src++) { 276222a13c5STomasz Figa struct clk *clk; 277222a13c5STomasz Figa 278222a13c5STomasz Figa clk = ourhost->clk_bus[src]; 279222a13c5STomasz Figa if (IS_ERR(clk)) 280222a13c5STomasz Figa continue; 281222a13c5STomasz Figa 282222a13c5STomasz Figa rate = clk_round_rate(clk, ULONG_MAX); 283222a13c5STomasz Figa if (rate > max) 284222a13c5STomasz Figa max = rate; 285222a13c5STomasz Figa } 286222a13c5STomasz Figa 287222a13c5STomasz Figa return max; 288253e0a7cSJeongbae Seo } 289253e0a7cSJeongbae Seo 290253e0a7cSJeongbae Seo /* sdhci_cmu_get_min_clock - callback to get minimal supported clock value. */ 291253e0a7cSJeongbae Seo static unsigned int sdhci_cmu_get_min_clock(struct sdhci_host *host) 292253e0a7cSJeongbae Seo { 293253e0a7cSJeongbae Seo struct sdhci_s3c *ourhost = to_s3c(host); 294222a13c5STomasz Figa unsigned long rate, min = ULONG_MAX; 295222a13c5STomasz Figa int src; 296253e0a7cSJeongbae Seo 297222a13c5STomasz Figa for (src = 0; src < MAX_BUS_CLK; src++) { 298222a13c5STomasz Figa struct clk *clk; 299222a13c5STomasz Figa 300222a13c5STomasz Figa clk = ourhost->clk_bus[src]; 301222a13c5STomasz Figa if (IS_ERR(clk)) 302222a13c5STomasz Figa continue; 303222a13c5STomasz Figa 304222a13c5STomasz Figa rate = clk_round_rate(clk, 0); 305222a13c5STomasz Figa if (rate < min) 306222a13c5STomasz Figa min = rate; 307222a13c5STomasz Figa } 308222a13c5STomasz Figa 309222a13c5STomasz Figa return min; 310253e0a7cSJeongbae Seo } 311253e0a7cSJeongbae Seo 312253e0a7cSJeongbae Seo /* sdhci_cmu_set_clock - callback on clock change.*/ 313253e0a7cSJeongbae Seo static void sdhci_cmu_set_clock(struct sdhci_host *host, unsigned int clock) 314253e0a7cSJeongbae Seo { 315253e0a7cSJeongbae Seo struct sdhci_s3c *ourhost = to_s3c(host); 3162ad0b249SJingoo Han struct device *dev = &ourhost->pdev->dev; 3173119936aSThomas Abraham unsigned long timeout; 3183119936aSThomas Abraham u16 clk = 0; 319253e0a7cSJeongbae Seo 3207ef2a5e2SJaehoon Chung /* If the clock is going off, set to 0 at clock control register */ 3217ef2a5e2SJaehoon Chung if (clock == 0) { 3227ef2a5e2SJaehoon Chung sdhci_writew(host, 0, SDHCI_CLOCK_CONTROL); 3237ef2a5e2SJaehoon Chung host->clock = clock; 324253e0a7cSJeongbae Seo return; 3257ef2a5e2SJaehoon Chung } 326253e0a7cSJeongbae Seo 327253e0a7cSJeongbae Seo sdhci_s3c_set_clock(host, clock); 328253e0a7cSJeongbae Seo 329253e0a7cSJeongbae Seo clk_set_rate(ourhost->clk_bus[ourhost->cur_clk], clock); 330253e0a7cSJeongbae Seo 331253e0a7cSJeongbae Seo host->clock = clock; 3323119936aSThomas Abraham 3333119936aSThomas Abraham clk = SDHCI_CLOCK_INT_EN; 3343119936aSThomas Abraham sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL); 3353119936aSThomas Abraham 3363119936aSThomas Abraham /* Wait max 20 ms */ 3373119936aSThomas Abraham timeout = 20; 3383119936aSThomas Abraham while (!((clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL)) 3393119936aSThomas Abraham & SDHCI_CLOCK_INT_STABLE)) { 3403119936aSThomas Abraham if (timeout == 0) { 3412ad0b249SJingoo Han dev_err(dev, "%s: Internal clock never stabilised.\n", 3422ad0b249SJingoo Han mmc_hostname(host->mmc)); 3433119936aSThomas Abraham return; 3443119936aSThomas Abraham } 3453119936aSThomas Abraham timeout--; 3463119936aSThomas Abraham mdelay(1); 3473119936aSThomas Abraham } 3483119936aSThomas Abraham 3493119936aSThomas Abraham clk |= SDHCI_CLOCK_CARD_EN; 3503119936aSThomas Abraham sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL); 351253e0a7cSJeongbae Seo } 352253e0a7cSJeongbae Seo 353548f07d2SJaehoon Chung /** 3547bc088d3SSascha Hauer * sdhci_s3c_platform_bus_width - support 8bit buswidth 355548f07d2SJaehoon Chung * @host: The SDHCI host being queried 356548f07d2SJaehoon Chung * @width: MMC_BUS_WIDTH_ macro for the bus width being requested 357548f07d2SJaehoon Chung * 358548f07d2SJaehoon Chung * We have 8-bit width support but is not a v3 controller. 3597bc088d3SSascha Hauer * So we add platform_bus_width() and support 8bit width. 360548f07d2SJaehoon Chung */ 3617bc088d3SSascha Hauer static int sdhci_s3c_platform_bus_width(struct sdhci_host *host, int width) 362548f07d2SJaehoon Chung { 363548f07d2SJaehoon Chung u8 ctrl; 364548f07d2SJaehoon Chung 365548f07d2SJaehoon Chung ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL); 366548f07d2SJaehoon Chung 367548f07d2SJaehoon Chung switch (width) { 368548f07d2SJaehoon Chung case MMC_BUS_WIDTH_8: 369548f07d2SJaehoon Chung ctrl |= SDHCI_CTRL_8BITBUS; 370548f07d2SJaehoon Chung ctrl &= ~SDHCI_CTRL_4BITBUS; 371548f07d2SJaehoon Chung break; 372548f07d2SJaehoon Chung case MMC_BUS_WIDTH_4: 373548f07d2SJaehoon Chung ctrl |= SDHCI_CTRL_4BITBUS; 374548f07d2SJaehoon Chung ctrl &= ~SDHCI_CTRL_8BITBUS; 375548f07d2SJaehoon Chung break; 376548f07d2SJaehoon Chung default: 37749bb1e61SGirish K S ctrl &= ~SDHCI_CTRL_4BITBUS; 37849bb1e61SGirish K S ctrl &= ~SDHCI_CTRL_8BITBUS; 379548f07d2SJaehoon Chung break; 380548f07d2SJaehoon Chung } 381548f07d2SJaehoon Chung 382548f07d2SJaehoon Chung sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL); 383548f07d2SJaehoon Chung 384548f07d2SJaehoon Chung return 0; 385548f07d2SJaehoon Chung } 386548f07d2SJaehoon Chung 3870d1bb41aSBen Dooks static struct sdhci_ops sdhci_s3c_ops = { 3880d1bb41aSBen Dooks .get_max_clock = sdhci_s3c_get_max_clk, 3890d1bb41aSBen Dooks .set_clock = sdhci_s3c_set_clock, 390ce5f036bSMarek Szyprowski .get_min_clock = sdhci_s3c_get_min_clock, 3917bc088d3SSascha Hauer .platform_bus_width = sdhci_s3c_platform_bus_width, 3920d1bb41aSBen Dooks }; 3930d1bb41aSBen Dooks 39417866e14SMarek Szyprowski static void sdhci_s3c_notify_change(struct platform_device *dev, int state) 39517866e14SMarek Szyprowski { 39617866e14SMarek Szyprowski struct sdhci_host *host = platform_get_drvdata(dev); 3974577f77bSSachin Kamat #ifdef CONFIG_PM_RUNTIME 398fe007c02SHeiko Stübner struct sdhci_s3c *sc = sdhci_priv(host); 3994577f77bSSachin Kamat #endif 40006fe577fSMarek Szyprowski unsigned long flags; 40106fe577fSMarek Szyprowski 40217866e14SMarek Szyprowski if (host) { 40306fe577fSMarek Szyprowski spin_lock_irqsave(&host->lock, flags); 40417866e14SMarek Szyprowski if (state) { 40517866e14SMarek Szyprowski dev_dbg(&dev->dev, "card inserted.\n"); 406fe007c02SHeiko Stübner #ifdef CONFIG_PM_RUNTIME 407fe007c02SHeiko Stübner clk_prepare_enable(sc->clk_io); 408fe007c02SHeiko Stübner #endif 40917866e14SMarek Szyprowski host->flags &= ~SDHCI_DEVICE_DEAD; 41017866e14SMarek Szyprowski host->quirks |= SDHCI_QUIRK_BROKEN_CARD_DETECTION; 41117866e14SMarek Szyprowski } else { 41217866e14SMarek Szyprowski dev_dbg(&dev->dev, "card removed.\n"); 41317866e14SMarek Szyprowski host->flags |= SDHCI_DEVICE_DEAD; 41417866e14SMarek Szyprowski host->quirks &= ~SDHCI_QUIRK_BROKEN_CARD_DETECTION; 415fe007c02SHeiko Stübner #ifdef CONFIG_PM_RUNTIME 416fe007c02SHeiko Stübner clk_disable_unprepare(sc->clk_io); 417fe007c02SHeiko Stübner #endif 41817866e14SMarek Szyprowski } 419f522886eSKyungmin Park tasklet_schedule(&host->card_tasklet); 42006fe577fSMarek Szyprowski spin_unlock_irqrestore(&host->lock, flags); 42117866e14SMarek Szyprowski } 42217866e14SMarek Szyprowski } 42317866e14SMarek Szyprowski 42417866e14SMarek Szyprowski static irqreturn_t sdhci_s3c_gpio_card_detect_thread(int irq, void *dev_id) 42517866e14SMarek Szyprowski { 42617866e14SMarek Szyprowski struct sdhci_s3c *sc = dev_id; 42717866e14SMarek Szyprowski int status = gpio_get_value(sc->ext_cd_gpio); 42817866e14SMarek Szyprowski if (sc->pdata->ext_cd_gpio_invert) 42917866e14SMarek Szyprowski status = !status; 43017866e14SMarek Szyprowski sdhci_s3c_notify_change(sc->pdev, status); 43117866e14SMarek Szyprowski return IRQ_HANDLED; 43217866e14SMarek Szyprowski } 43317866e14SMarek Szyprowski 43417866e14SMarek Szyprowski static void sdhci_s3c_setup_card_detect_gpio(struct sdhci_s3c *sc) 43517866e14SMarek Szyprowski { 43617866e14SMarek Szyprowski struct s3c_sdhci_platdata *pdata = sc->pdata; 43717866e14SMarek Szyprowski struct device *dev = &sc->pdev->dev; 43817866e14SMarek Szyprowski 439b1b8fea9STomasz Figa if (devm_gpio_request(dev, pdata->ext_cd_gpio, "SDHCI EXT CD") == 0) { 44017866e14SMarek Szyprowski sc->ext_cd_gpio = pdata->ext_cd_gpio; 44117866e14SMarek Szyprowski sc->ext_cd_irq = gpio_to_irq(pdata->ext_cd_gpio); 44217866e14SMarek Szyprowski if (sc->ext_cd_irq && 44317866e14SMarek Szyprowski request_threaded_irq(sc->ext_cd_irq, NULL, 44417866e14SMarek Szyprowski sdhci_s3c_gpio_card_detect_thread, 4452ad0b249SJingoo Han IRQF_TRIGGER_RISING | 4462ad0b249SJingoo Han IRQF_TRIGGER_FALLING | 4472ad0b249SJingoo Han IRQF_ONESHOT, 44817866e14SMarek Szyprowski dev_name(dev), sc) == 0) { 44917866e14SMarek Szyprowski int status = gpio_get_value(sc->ext_cd_gpio); 45017866e14SMarek Szyprowski if (pdata->ext_cd_gpio_invert) 45117866e14SMarek Szyprowski status = !status; 45217866e14SMarek Szyprowski sdhci_s3c_notify_change(sc->pdev, status); 45317866e14SMarek Szyprowski } else { 45417866e14SMarek Szyprowski dev_warn(dev, "cannot request irq for card detect\n"); 45517866e14SMarek Szyprowski sc->ext_cd_irq = 0; 45617866e14SMarek Szyprowski } 45717866e14SMarek Szyprowski } else { 45817866e14SMarek Szyprowski dev_err(dev, "cannot request gpio for card detect\n"); 45917866e14SMarek Szyprowski } 46017866e14SMarek Szyprowski } 46117866e14SMarek Szyprowski 462cd1b00ebSThomas Abraham #ifdef CONFIG_OF 463c3be1efdSBill Pemberton static int sdhci_s3c_parse_dt(struct device *dev, 464cd1b00ebSThomas Abraham struct sdhci_host *host, struct s3c_sdhci_platdata *pdata) 465cd1b00ebSThomas Abraham { 466cd1b00ebSThomas Abraham struct device_node *node = dev->of_node; 467cd1b00ebSThomas Abraham struct sdhci_s3c *ourhost = to_s3c(host); 468cd1b00ebSThomas Abraham u32 max_width; 469e19499aeSThomas Abraham int gpio; 470cd1b00ebSThomas Abraham 471cd1b00ebSThomas Abraham /* if the bus-width property is not specified, assume width as 1 */ 472cd1b00ebSThomas Abraham if (of_property_read_u32(node, "bus-width", &max_width)) 473cd1b00ebSThomas Abraham max_width = 1; 474cd1b00ebSThomas Abraham pdata->max_width = max_width; 475cd1b00ebSThomas Abraham 476cd1b00ebSThomas Abraham /* get the card detection method */ 477ab5023efSTushar Behera if (of_get_property(node, "broken-cd", NULL)) { 478cd1b00ebSThomas Abraham pdata->cd_type = S3C_SDHCI_CD_NONE; 479e19499aeSThomas Abraham return 0; 480cd1b00ebSThomas Abraham } 481cd1b00ebSThomas Abraham 482ab5023efSTushar Behera if (of_get_property(node, "non-removable", NULL)) { 483cd1b00ebSThomas Abraham pdata->cd_type = S3C_SDHCI_CD_PERMANENT; 484e19499aeSThomas Abraham return 0; 485cd1b00ebSThomas Abraham } 486cd1b00ebSThomas Abraham 487cd1b00ebSThomas Abraham gpio = of_get_named_gpio(node, "cd-gpios", 0); 488cd1b00ebSThomas Abraham if (gpio_is_valid(gpio)) { 489cd1b00ebSThomas Abraham pdata->cd_type = S3C_SDHCI_CD_GPIO; 490e19499aeSThomas Abraham pdata->ext_cd_gpio = gpio; 491e19499aeSThomas Abraham ourhost->ext_cd_gpio = -1; 492e19499aeSThomas Abraham if (of_get_property(node, "cd-inverted", NULL)) 493e19499aeSThomas Abraham pdata->ext_cd_gpio_invert = 1; 494e19499aeSThomas Abraham return 0; 495cd1b00ebSThomas Abraham } else if (gpio != -ENOENT) { 496cd1b00ebSThomas Abraham dev_err(dev, "invalid card detect gpio specified\n"); 497cd1b00ebSThomas Abraham return -EINVAL; 498cd1b00ebSThomas Abraham } 499cd1b00ebSThomas Abraham 500b96efccbSTomasz Figa /* assuming internal card detect that will be configured by pinctrl */ 501b96efccbSTomasz Figa pdata->cd_type = S3C_SDHCI_CD_INTERNAL; 502cd1b00ebSThomas Abraham return 0; 503cd1b00ebSThomas Abraham } 504cd1b00ebSThomas Abraham #else 505c3be1efdSBill Pemberton static int sdhci_s3c_parse_dt(struct device *dev, 506cd1b00ebSThomas Abraham struct sdhci_host *host, struct s3c_sdhci_platdata *pdata) 507cd1b00ebSThomas Abraham { 508cd1b00ebSThomas Abraham return -EINVAL; 509cd1b00ebSThomas Abraham } 510cd1b00ebSThomas Abraham #endif 511cd1b00ebSThomas Abraham 512cd1b00ebSThomas Abraham static const struct of_device_id sdhci_s3c_dt_match[]; 513cd1b00ebSThomas Abraham 5143119936aSThomas Abraham static inline struct sdhci_s3c_drv_data *sdhci_s3c_get_driver_data( 5153119936aSThomas Abraham struct platform_device *pdev) 5163119936aSThomas Abraham { 517cd1b00ebSThomas Abraham #ifdef CONFIG_OF 518cd1b00ebSThomas Abraham if (pdev->dev.of_node) { 519cd1b00ebSThomas Abraham const struct of_device_id *match; 520cd1b00ebSThomas Abraham match = of_match_node(sdhci_s3c_dt_match, pdev->dev.of_node); 521cd1b00ebSThomas Abraham return (struct sdhci_s3c_drv_data *)match->data; 522cd1b00ebSThomas Abraham } 523cd1b00ebSThomas Abraham #endif 5243119936aSThomas Abraham return (struct sdhci_s3c_drv_data *) 5253119936aSThomas Abraham platform_get_device_id(pdev)->driver_data; 5263119936aSThomas Abraham } 5273119936aSThomas Abraham 528c3be1efdSBill Pemberton static int sdhci_s3c_probe(struct platform_device *pdev) 5290d1bb41aSBen Dooks { 5301d4dc338SThomas Abraham struct s3c_sdhci_platdata *pdata; 5313119936aSThomas Abraham struct sdhci_s3c_drv_data *drv_data; 5320d1bb41aSBen Dooks struct device *dev = &pdev->dev; 5330d1bb41aSBen Dooks struct sdhci_host *host; 5340d1bb41aSBen Dooks struct sdhci_s3c *sc; 5350d1bb41aSBen Dooks struct resource *res; 5360d1bb41aSBen Dooks int ret, irq, ptr, clks; 5370d1bb41aSBen Dooks 538cd1b00ebSThomas Abraham if (!pdev->dev.platform_data && !pdev->dev.of_node) { 5390d1bb41aSBen Dooks dev_err(dev, "no device data specified\n"); 5400d1bb41aSBen Dooks return -ENOENT; 5410d1bb41aSBen Dooks } 5420d1bb41aSBen Dooks 5430d1bb41aSBen Dooks irq = platform_get_irq(pdev, 0); 5440d1bb41aSBen Dooks if (irq < 0) { 5450d1bb41aSBen Dooks dev_err(dev, "no irq specified\n"); 5460d1bb41aSBen Dooks return irq; 5470d1bb41aSBen Dooks } 5480d1bb41aSBen Dooks 5490d1bb41aSBen Dooks host = sdhci_alloc_host(dev, sizeof(struct sdhci_s3c)); 5500d1bb41aSBen Dooks if (IS_ERR(host)) { 5510d1bb41aSBen Dooks dev_err(dev, "sdhci_alloc_host() failed\n"); 5520d1bb41aSBen Dooks return PTR_ERR(host); 5530d1bb41aSBen Dooks } 554cd1b00ebSThomas Abraham sc = sdhci_priv(host); 5550d1bb41aSBen Dooks 5561d4dc338SThomas Abraham pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); 5571d4dc338SThomas Abraham if (!pdata) { 5581d4dc338SThomas Abraham ret = -ENOMEM; 559b1b8fea9STomasz Figa goto err_pdata_io_clk; 5601d4dc338SThomas Abraham } 561cd1b00ebSThomas Abraham 562cd1b00ebSThomas Abraham if (pdev->dev.of_node) { 563cd1b00ebSThomas Abraham ret = sdhci_s3c_parse_dt(&pdev->dev, host, pdata); 564cd1b00ebSThomas Abraham if (ret) 565b1b8fea9STomasz Figa goto err_pdata_io_clk; 566cd1b00ebSThomas Abraham } else { 5671d4dc338SThomas Abraham memcpy(pdata, pdev->dev.platform_data, sizeof(*pdata)); 568cd1b00ebSThomas Abraham sc->ext_cd_gpio = -1; /* invalid gpio number */ 569cd1b00ebSThomas Abraham } 5701d4dc338SThomas Abraham 5713119936aSThomas Abraham drv_data = sdhci_s3c_get_driver_data(pdev); 5720d1bb41aSBen Dooks 5730d1bb41aSBen Dooks sc->host = host; 5740d1bb41aSBen Dooks sc->pdev = pdev; 5750d1bb41aSBen Dooks sc->pdata = pdata; 5760d1bb41aSBen Dooks 5770d1bb41aSBen Dooks platform_set_drvdata(pdev, host); 5780d1bb41aSBen Dooks 5793aaf7ba7SJingoo Han sc->clk_io = devm_clk_get(dev, "hsmmc"); 5800d1bb41aSBen Dooks if (IS_ERR(sc->clk_io)) { 5810d1bb41aSBen Dooks dev_err(dev, "failed to get io clock\n"); 5820d1bb41aSBen Dooks ret = PTR_ERR(sc->clk_io); 583b1b8fea9STomasz Figa goto err_pdata_io_clk; 5840d1bb41aSBen Dooks } 5850d1bb41aSBen Dooks 5860d1bb41aSBen Dooks /* enable the local io clock and keep it running for the moment. */ 5870f310a05SThomas Abraham clk_prepare_enable(sc->clk_io); 5880d1bb41aSBen Dooks 5890d1bb41aSBen Dooks for (clks = 0, ptr = 0; ptr < MAX_BUS_CLK; ptr++) { 5904346b6d9SRajeshwari Shinde char name[14]; 5910d1bb41aSBen Dooks 5924346b6d9SRajeshwari Shinde snprintf(name, 14, "mmc_busclk.%d", ptr); 5938f4b78d9STomasz Figa sc->clk_bus[ptr] = devm_clk_get(dev, name); 5948f4b78d9STomasz Figa if (IS_ERR(sc->clk_bus[ptr])) 5950d1bb41aSBen Dooks continue; 5960d1bb41aSBen Dooks 5970d1bb41aSBen Dooks clks++; 598253e0a7cSJeongbae Seo 599253e0a7cSJeongbae Seo /* 600253e0a7cSJeongbae Seo * save current clock index to know which clock bus 601253e0a7cSJeongbae Seo * is used later in overriding functions. 602253e0a7cSJeongbae Seo */ 603253e0a7cSJeongbae Seo sc->cur_clk = ptr; 604253e0a7cSJeongbae Seo 6056eb28bdcSTomasz Figa sc->clk_rates[ptr] = clk_get_rate(sc->clk_bus[ptr]); 6066eb28bdcSTomasz Figa 6070d1bb41aSBen Dooks dev_info(dev, "clock source %d: %s (%ld Hz)\n", 6086eb28bdcSTomasz Figa ptr, name, sc->clk_rates[ptr]); 6090d1bb41aSBen Dooks } 6100d1bb41aSBen Dooks 6110d1bb41aSBen Dooks if (clks == 0) { 6120d1bb41aSBen Dooks dev_err(dev, "failed to find any bus clocks\n"); 6130d1bb41aSBen Dooks ret = -ENOENT; 6140d1bb41aSBen Dooks goto err_no_busclks; 6150d1bb41aSBen Dooks } 6160d1bb41aSBen Dooks 6172abeb5c5SChander Kashyap #ifndef CONFIG_PM_RUNTIME 6180f310a05SThomas Abraham clk_prepare_enable(sc->clk_bus[sc->cur_clk]); 6192abeb5c5SChander Kashyap #endif 620e684c468SChander Kashyap 6219bda6da7SJulia Lawall res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 622a3e2cd7fSThierry Reding host->ioaddr = devm_ioremap_resource(&pdev->dev, res); 623a3e2cd7fSThierry Reding if (IS_ERR(host->ioaddr)) { 624a3e2cd7fSThierry Reding ret = PTR_ERR(host->ioaddr); 6250d1bb41aSBen Dooks goto err_req_regs; 6260d1bb41aSBen Dooks } 6270d1bb41aSBen Dooks 6280d1bb41aSBen Dooks /* Ensure we have minimal gpio selected CMD/CLK/Detect */ 6290d1bb41aSBen Dooks if (pdata->cfg_gpio) 6300d1bb41aSBen Dooks pdata->cfg_gpio(pdev, pdata->max_width); 6310d1bb41aSBen Dooks 6320d1bb41aSBen Dooks host->hw_name = "samsung-hsmmc"; 6330d1bb41aSBen Dooks host->ops = &sdhci_s3c_ops; 6340d1bb41aSBen Dooks host->quirks = 0; 635285e244fSJaehoon Chung host->quirks2 = 0; 6360d1bb41aSBen Dooks host->irq = irq; 6370d1bb41aSBen Dooks 6380d1bb41aSBen Dooks /* Setup quirks for the controller */ 639b2e75effSThomas Abraham host->quirks |= SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC; 640a1d56460SMarek Szyprowski host->quirks |= SDHCI_QUIRK_NO_HISPD_BIT; 6413119936aSThomas Abraham if (drv_data) 6423119936aSThomas Abraham host->quirks |= drv_data->sdhci_quirks; 6430d1bb41aSBen Dooks 6440d1bb41aSBen Dooks #ifndef CONFIG_MMC_SDHCI_S3C_DMA 6450d1bb41aSBen Dooks 6460d1bb41aSBen Dooks /* we currently see overruns on errors, so disable the SDMA 6470d1bb41aSBen Dooks * support as well. */ 6480d1bb41aSBen Dooks host->quirks |= SDHCI_QUIRK_BROKEN_DMA; 6490d1bb41aSBen Dooks 6500d1bb41aSBen Dooks #endif /* CONFIG_MMC_SDHCI_S3C_DMA */ 6510d1bb41aSBen Dooks 6520d1bb41aSBen Dooks /* It seems we do not get an DATA transfer complete on non-busy 6530d1bb41aSBen Dooks * transfers, not sure if this is a problem with this specific 6540d1bb41aSBen Dooks * SDHCI block, or a missing configuration that needs to be set. */ 6550d1bb41aSBen Dooks host->quirks |= SDHCI_QUIRK_NO_BUSY_IRQ; 6560d1bb41aSBen Dooks 657732f0e31SKyungmin Park /* This host supports the Auto CMD12 */ 658732f0e31SKyungmin Park host->quirks |= SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12; 659732f0e31SKyungmin Park 6607199e2b6SJaehoon Chung /* Samsung SoCs need BROKEN_ADMA_ZEROLEN_DESC */ 6617199e2b6SJaehoon Chung host->quirks |= SDHCI_QUIRK_BROKEN_ADMA_ZEROLEN_DESC; 6627199e2b6SJaehoon Chung 66317866e14SMarek Szyprowski if (pdata->cd_type == S3C_SDHCI_CD_NONE || 66417866e14SMarek Szyprowski pdata->cd_type == S3C_SDHCI_CD_PERMANENT) 66517866e14SMarek Szyprowski host->quirks |= SDHCI_QUIRK_BROKEN_CARD_DETECTION; 66617866e14SMarek Szyprowski 66717866e14SMarek Szyprowski if (pdata->cd_type == S3C_SDHCI_CD_PERMANENT) 66817866e14SMarek Szyprowski host->mmc->caps = MMC_CAP_NONREMOVABLE; 66917866e14SMarek Szyprowski 6700d22c770SThomas Abraham switch (pdata->max_width) { 6710d22c770SThomas Abraham case 8: 6720d22c770SThomas Abraham host->mmc->caps |= MMC_CAP_8_BIT_DATA; 6730d22c770SThomas Abraham case 4: 6740d22c770SThomas Abraham host->mmc->caps |= MMC_CAP_4_BIT_DATA; 6750d22c770SThomas Abraham break; 6760d22c770SThomas Abraham } 6770d22c770SThomas Abraham 678fa1773ccSSangwook Lee if (pdata->pm_caps) 679fa1773ccSSangwook Lee host->mmc->pm_caps |= pdata->pm_caps; 680fa1773ccSSangwook Lee 6810d1bb41aSBen Dooks host->quirks |= (SDHCI_QUIRK_32BIT_DMA_ADDR | 6820d1bb41aSBen Dooks SDHCI_QUIRK_32BIT_DMA_SIZE); 6830d1bb41aSBen Dooks 6843fe42e07SHyuk Lee /* HSMMC on Samsung SoCs uses SDCLK as timeout clock */ 6853fe42e07SHyuk Lee host->quirks |= SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK; 6863fe42e07SHyuk Lee 687253e0a7cSJeongbae Seo /* 688253e0a7cSJeongbae Seo * If controller does not have internal clock divider, 689253e0a7cSJeongbae Seo * we can use overriding functions instead of default. 690253e0a7cSJeongbae Seo */ 6913119936aSThomas Abraham if (host->quirks & SDHCI_QUIRK_NONSTANDARD_CLOCK) { 692253e0a7cSJeongbae Seo sdhci_s3c_ops.set_clock = sdhci_cmu_set_clock; 693253e0a7cSJeongbae Seo sdhci_s3c_ops.get_min_clock = sdhci_cmu_get_min_clock; 694253e0a7cSJeongbae Seo sdhci_s3c_ops.get_max_clock = sdhci_cmu_get_max_clock; 695253e0a7cSJeongbae Seo } 696253e0a7cSJeongbae Seo 697b3824f2cSJeongbae Seo /* It supports additional host capabilities if needed */ 698b3824f2cSJeongbae Seo if (pdata->host_caps) 699b3824f2cSJeongbae Seo host->mmc->caps |= pdata->host_caps; 700b3824f2cSJeongbae Seo 701c1c4b66dSJaehoon Chung if (pdata->host_caps2) 702c1c4b66dSJaehoon Chung host->mmc->caps2 |= pdata->host_caps2; 703c1c4b66dSJaehoon Chung 7049f4e8151SMark Brown pm_runtime_enable(&pdev->dev); 7059f4e8151SMark Brown pm_runtime_set_autosuspend_delay(&pdev->dev, 50); 7069f4e8151SMark Brown pm_runtime_use_autosuspend(&pdev->dev); 7079f4e8151SMark Brown pm_suspend_ignore_children(&pdev->dev, 1); 7089f4e8151SMark Brown 7090d1bb41aSBen Dooks ret = sdhci_add_host(host); 7100d1bb41aSBen Dooks if (ret) { 7110d1bb41aSBen Dooks dev_err(dev, "sdhci_add_host() failed\n"); 7129f4e8151SMark Brown pm_runtime_forbid(&pdev->dev); 7139f4e8151SMark Brown pm_runtime_get_noresume(&pdev->dev); 7149bda6da7SJulia Lawall goto err_req_regs; 7150d1bb41aSBen Dooks } 7160d1bb41aSBen Dooks 71717866e14SMarek Szyprowski /* The following two methods of card detection might call 71817866e14SMarek Szyprowski sdhci_s3c_notify_change() immediately, so they can be called 71917866e14SMarek Szyprowski only after sdhci_add_host(). Setup errors are ignored. */ 72017866e14SMarek Szyprowski if (pdata->cd_type == S3C_SDHCI_CD_EXTERNAL && pdata->ext_cd_init) 72117866e14SMarek Szyprowski pdata->ext_cd_init(&sdhci_s3c_notify_change); 72217866e14SMarek Szyprowski if (pdata->cd_type == S3C_SDHCI_CD_GPIO && 72317866e14SMarek Szyprowski gpio_is_valid(pdata->ext_cd_gpio)) 72417866e14SMarek Szyprowski sdhci_s3c_setup_card_detect_gpio(sc); 72517866e14SMarek Szyprowski 7262abeb5c5SChander Kashyap #ifdef CONFIG_PM_RUNTIME 7270aa55c23SSeungwon Jeon if (pdata->cd_type != S3C_SDHCI_CD_INTERNAL) 7280f310a05SThomas Abraham clk_disable_unprepare(sc->clk_io); 7292abeb5c5SChander Kashyap #endif 7300d1bb41aSBen Dooks return 0; 7310d1bb41aSBen Dooks 7320d1bb41aSBen Dooks err_req_regs: 7332abeb5c5SChander Kashyap #ifndef CONFIG_PM_RUNTIME 7340f310a05SThomas Abraham clk_disable_unprepare(sc->clk_bus[sc->cur_clk]); 7352abeb5c5SChander Kashyap #endif 7360d1bb41aSBen Dooks 7370d1bb41aSBen Dooks err_no_busclks: 7380f310a05SThomas Abraham clk_disable_unprepare(sc->clk_io); 7390d1bb41aSBen Dooks 740b1b8fea9STomasz Figa err_pdata_io_clk: 7410d1bb41aSBen Dooks sdhci_free_host(host); 7420d1bb41aSBen Dooks 7430d1bb41aSBen Dooks return ret; 7440d1bb41aSBen Dooks } 7450d1bb41aSBen Dooks 7466e0ee714SBill Pemberton static int sdhci_s3c_remove(struct platform_device *pdev) 7470d1bb41aSBen Dooks { 7489d51a6b2SMarek Szyprowski struct sdhci_host *host = platform_get_drvdata(pdev); 7499d51a6b2SMarek Szyprowski struct sdhci_s3c *sc = sdhci_priv(host); 750cd1b00ebSThomas Abraham struct s3c_sdhci_platdata *pdata = sc->pdata; 7519d51a6b2SMarek Szyprowski 75217866e14SMarek Szyprowski if (pdata->cd_type == S3C_SDHCI_CD_EXTERNAL && pdata->ext_cd_cleanup) 75317866e14SMarek Szyprowski pdata->ext_cd_cleanup(&sdhci_s3c_notify_change); 75417866e14SMarek Szyprowski 75517866e14SMarek Szyprowski if (sc->ext_cd_irq) 75617866e14SMarek Szyprowski free_irq(sc->ext_cd_irq, sc); 75717866e14SMarek Szyprowski 7582abeb5c5SChander Kashyap #ifdef CONFIG_PM_RUNTIME 7590aa55c23SSeungwon Jeon if (pdata->cd_type != S3C_SDHCI_CD_INTERNAL) 7600f310a05SThomas Abraham clk_prepare_enable(sc->clk_io); 7612abeb5c5SChander Kashyap #endif 7629d51a6b2SMarek Szyprowski sdhci_remove_host(host, 1); 7639d51a6b2SMarek Szyprowski 764387a8cbdSChander Kashyap pm_runtime_dont_use_autosuspend(&pdev->dev); 7659f4e8151SMark Brown pm_runtime_disable(&pdev->dev); 7669f4e8151SMark Brown 7672abeb5c5SChander Kashyap #ifndef CONFIG_PM_RUNTIME 7680f310a05SThomas Abraham clk_disable_unprepare(sc->clk_bus[sc->cur_clk]); 7692abeb5c5SChander Kashyap #endif 7700f310a05SThomas Abraham clk_disable_unprepare(sc->clk_io); 7719d51a6b2SMarek Szyprowski 7729d51a6b2SMarek Szyprowski sdhci_free_host(host); 7739d51a6b2SMarek Szyprowski 7740d1bb41aSBen Dooks return 0; 7750d1bb41aSBen Dooks } 7760d1bb41aSBen Dooks 777d5e9c02cSMark Brown #ifdef CONFIG_PM_SLEEP 77829495aa0SManuel Lauss static int sdhci_s3c_suspend(struct device *dev) 7790d1bb41aSBen Dooks { 78029495aa0SManuel Lauss struct sdhci_host *host = dev_get_drvdata(dev); 7810d1bb41aSBen Dooks 78229495aa0SManuel Lauss return sdhci_suspend_host(host); 7830d1bb41aSBen Dooks } 7840d1bb41aSBen Dooks 78529495aa0SManuel Lauss static int sdhci_s3c_resume(struct device *dev) 7860d1bb41aSBen Dooks { 78729495aa0SManuel Lauss struct sdhci_host *host = dev_get_drvdata(dev); 7880d1bb41aSBen Dooks 78965d13516SWonil Choi return sdhci_resume_host(host); 7900d1bb41aSBen Dooks } 791d5e9c02cSMark Brown #endif 7920d1bb41aSBen Dooks 7939f4e8151SMark Brown #ifdef CONFIG_PM_RUNTIME 7949f4e8151SMark Brown static int sdhci_s3c_runtime_suspend(struct device *dev) 7959f4e8151SMark Brown { 7969f4e8151SMark Brown struct sdhci_host *host = dev_get_drvdata(dev); 7972abeb5c5SChander Kashyap struct sdhci_s3c *ourhost = to_s3c(host); 7982abeb5c5SChander Kashyap struct clk *busclk = ourhost->clk_io; 7992abeb5c5SChander Kashyap int ret; 8009f4e8151SMark Brown 8012abeb5c5SChander Kashyap ret = sdhci_runtime_suspend_host(host); 8022abeb5c5SChander Kashyap 8030f310a05SThomas Abraham clk_disable_unprepare(ourhost->clk_bus[ourhost->cur_clk]); 8040f310a05SThomas Abraham clk_disable_unprepare(busclk); 8052abeb5c5SChander Kashyap return ret; 8069f4e8151SMark Brown } 8079f4e8151SMark Brown 8089f4e8151SMark Brown static int sdhci_s3c_runtime_resume(struct device *dev) 8099f4e8151SMark Brown { 8109f4e8151SMark Brown struct sdhci_host *host = dev_get_drvdata(dev); 8112abeb5c5SChander Kashyap struct sdhci_s3c *ourhost = to_s3c(host); 8122abeb5c5SChander Kashyap struct clk *busclk = ourhost->clk_io; 8132abeb5c5SChander Kashyap int ret; 8149f4e8151SMark Brown 8150f310a05SThomas Abraham clk_prepare_enable(busclk); 8160f310a05SThomas Abraham clk_prepare_enable(ourhost->clk_bus[ourhost->cur_clk]); 8172abeb5c5SChander Kashyap ret = sdhci_runtime_resume_host(host); 8182abeb5c5SChander Kashyap return ret; 8199f4e8151SMark Brown } 8209f4e8151SMark Brown #endif 8219f4e8151SMark Brown 822d5e9c02cSMark Brown #ifdef CONFIG_PM 82329495aa0SManuel Lauss static const struct dev_pm_ops sdhci_s3c_pmops = { 824d5e9c02cSMark Brown SET_SYSTEM_SLEEP_PM_OPS(sdhci_s3c_suspend, sdhci_s3c_resume) 8259f4e8151SMark Brown SET_RUNTIME_PM_OPS(sdhci_s3c_runtime_suspend, sdhci_s3c_runtime_resume, 8269f4e8151SMark Brown NULL) 82729495aa0SManuel Lauss }; 82829495aa0SManuel Lauss 82929495aa0SManuel Lauss #define SDHCI_S3C_PMOPS (&sdhci_s3c_pmops) 83029495aa0SManuel Lauss 8310d1bb41aSBen Dooks #else 83229495aa0SManuel Lauss #define SDHCI_S3C_PMOPS NULL 8330d1bb41aSBen Dooks #endif 8340d1bb41aSBen Dooks 8353119936aSThomas Abraham #if defined(CONFIG_CPU_EXYNOS4210) || defined(CONFIG_SOC_EXYNOS4212) 8363119936aSThomas Abraham static struct sdhci_s3c_drv_data exynos4_sdhci_drv_data = { 8373119936aSThomas Abraham .sdhci_quirks = SDHCI_QUIRK_NONSTANDARD_CLOCK, 8383119936aSThomas Abraham }; 8393119936aSThomas Abraham #define EXYNOS4_SDHCI_DRV_DATA ((kernel_ulong_t)&exynos4_sdhci_drv_data) 8403119936aSThomas Abraham #else 8413119936aSThomas Abraham #define EXYNOS4_SDHCI_DRV_DATA ((kernel_ulong_t)NULL) 8423119936aSThomas Abraham #endif 8433119936aSThomas Abraham 8443119936aSThomas Abraham static struct platform_device_id sdhci_s3c_driver_ids[] = { 8453119936aSThomas Abraham { 8463119936aSThomas Abraham .name = "s3c-sdhci", 8473119936aSThomas Abraham .driver_data = (kernel_ulong_t)NULL, 8483119936aSThomas Abraham }, { 8493119936aSThomas Abraham .name = "exynos4-sdhci", 8503119936aSThomas Abraham .driver_data = EXYNOS4_SDHCI_DRV_DATA, 8513119936aSThomas Abraham }, 8523119936aSThomas Abraham { } 8533119936aSThomas Abraham }; 8543119936aSThomas Abraham MODULE_DEVICE_TABLE(platform, sdhci_s3c_driver_ids); 8553119936aSThomas Abraham 856cd1b00ebSThomas Abraham #ifdef CONFIG_OF 857cd1b00ebSThomas Abraham static const struct of_device_id sdhci_s3c_dt_match[] = { 858cd1b00ebSThomas Abraham { .compatible = "samsung,s3c6410-sdhci", }, 859cd1b00ebSThomas Abraham { .compatible = "samsung,exynos4210-sdhci", 860cd1b00ebSThomas Abraham .data = (void *)EXYNOS4_SDHCI_DRV_DATA }, 861cd1b00ebSThomas Abraham {}, 862cd1b00ebSThomas Abraham }; 863cd1b00ebSThomas Abraham MODULE_DEVICE_TABLE(of, sdhci_s3c_dt_match); 864cd1b00ebSThomas Abraham #endif 865cd1b00ebSThomas Abraham 8660d1bb41aSBen Dooks static struct platform_driver sdhci_s3c_driver = { 8670d1bb41aSBen Dooks .probe = sdhci_s3c_probe, 8680433c143SBill Pemberton .remove = sdhci_s3c_remove, 8693119936aSThomas Abraham .id_table = sdhci_s3c_driver_ids, 8700d1bb41aSBen Dooks .driver = { 8710d1bb41aSBen Dooks .owner = THIS_MODULE, 8720d1bb41aSBen Dooks .name = "s3c-sdhci", 873cd1b00ebSThomas Abraham .of_match_table = of_match_ptr(sdhci_s3c_dt_match), 87429495aa0SManuel Lauss .pm = SDHCI_S3C_PMOPS, 8750d1bb41aSBen Dooks }, 8760d1bb41aSBen Dooks }; 8770d1bb41aSBen Dooks 878d1f81a64SAxel Lin module_platform_driver(sdhci_s3c_driver); 8790d1bb41aSBen Dooks 8800d1bb41aSBen Dooks MODULE_DESCRIPTION("Samsung SDHCI (HSMMC) glue"); 8810d1bb41aSBen Dooks MODULE_AUTHOR("Ben Dooks, <ben@simtec.co.uk>"); 8820d1bb41aSBen Dooks MODULE_LICENSE("GPL v2"); 8830d1bb41aSBen Dooks MODULE_ALIAS("platform:s3c-sdhci"); 884