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]; 600d1bb41aSBen Dooks }; 610d1bb41aSBen Dooks 623119936aSThomas Abraham /** 633119936aSThomas Abraham * struct sdhci_s3c_driver_data - S3C SDHCI platform specific driver data 643119936aSThomas Abraham * @sdhci_quirks: sdhci host specific quirks. 653119936aSThomas Abraham * 663119936aSThomas Abraham * Specifies platform specific configuration of sdhci controller. 673119936aSThomas Abraham * Note: A structure for driver specific platform data is used for future 683119936aSThomas Abraham * expansion of its usage. 693119936aSThomas Abraham */ 703119936aSThomas Abraham struct sdhci_s3c_drv_data { 713119936aSThomas Abraham unsigned int sdhci_quirks; 723119936aSThomas Abraham }; 733119936aSThomas Abraham 740d1bb41aSBen Dooks static inline struct sdhci_s3c *to_s3c(struct sdhci_host *host) 750d1bb41aSBen Dooks { 760d1bb41aSBen Dooks return sdhci_priv(host); 770d1bb41aSBen Dooks } 780d1bb41aSBen Dooks 790d1bb41aSBen Dooks /** 800d1bb41aSBen Dooks * get_curclk - convert ctrl2 register to clock source number 810d1bb41aSBen Dooks * @ctrl2: Control2 register value. 820d1bb41aSBen Dooks */ 830d1bb41aSBen Dooks static u32 get_curclk(u32 ctrl2) 840d1bb41aSBen Dooks { 850d1bb41aSBen Dooks ctrl2 &= S3C_SDHCI_CTRL2_SELBASECLK_MASK; 860d1bb41aSBen Dooks ctrl2 >>= S3C_SDHCI_CTRL2_SELBASECLK_SHIFT; 870d1bb41aSBen Dooks 880d1bb41aSBen Dooks return ctrl2; 890d1bb41aSBen Dooks } 900d1bb41aSBen Dooks 910d1bb41aSBen Dooks static void sdhci_s3c_check_sclk(struct sdhci_host *host) 920d1bb41aSBen Dooks { 930d1bb41aSBen Dooks struct sdhci_s3c *ourhost = to_s3c(host); 940d1bb41aSBen Dooks u32 tmp = readl(host->ioaddr + S3C_SDHCI_CONTROL2); 950d1bb41aSBen Dooks 960d1bb41aSBen Dooks if (get_curclk(tmp) != ourhost->cur_clk) { 970d1bb41aSBen Dooks dev_dbg(&ourhost->pdev->dev, "restored ctrl2 clock setting\n"); 980d1bb41aSBen Dooks 990d1bb41aSBen Dooks tmp &= ~S3C_SDHCI_CTRL2_SELBASECLK_MASK; 1000d1bb41aSBen Dooks tmp |= ourhost->cur_clk << S3C_SDHCI_CTRL2_SELBASECLK_SHIFT; 1017003fecbSJingoo Han writel(tmp, host->ioaddr + S3C_SDHCI_CONTROL2); 1020d1bb41aSBen Dooks } 1030d1bb41aSBen Dooks } 1040d1bb41aSBen Dooks 1050d1bb41aSBen Dooks /** 1060d1bb41aSBen Dooks * sdhci_s3c_get_max_clk - callback to get maximum clock frequency. 1070d1bb41aSBen Dooks * @host: The SDHCI host instance. 1080d1bb41aSBen Dooks * 1090d1bb41aSBen Dooks * Callback to return the maximum clock rate acheivable by the controller. 1100d1bb41aSBen Dooks */ 1110d1bb41aSBen Dooks static unsigned int sdhci_s3c_get_max_clk(struct sdhci_host *host) 1120d1bb41aSBen Dooks { 1130d1bb41aSBen Dooks struct sdhci_s3c *ourhost = to_s3c(host); 1140d1bb41aSBen Dooks struct clk *busclk; 1150d1bb41aSBen Dooks unsigned int rate, max; 1160d1bb41aSBen Dooks int clk; 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 for (max = 0, clk = 0; clk < MAX_BUS_CLK; clk++) { 1230d1bb41aSBen Dooks busclk = ourhost->clk_bus[clk]; 1240d1bb41aSBen Dooks if (!busclk) 1250d1bb41aSBen Dooks continue; 1260d1bb41aSBen Dooks 1270d1bb41aSBen Dooks rate = clk_get_rate(busclk); 1280d1bb41aSBen Dooks if (rate > max) 1290d1bb41aSBen Dooks max = rate; 1300d1bb41aSBen Dooks } 1310d1bb41aSBen Dooks 1320d1bb41aSBen Dooks return max; 1330d1bb41aSBen Dooks } 1340d1bb41aSBen Dooks 1350d1bb41aSBen Dooks /** 1360d1bb41aSBen Dooks * sdhci_s3c_consider_clock - consider one the bus clocks for current setting 1370d1bb41aSBen Dooks * @ourhost: Our SDHCI instance. 1380d1bb41aSBen Dooks * @src: The source clock index. 1390d1bb41aSBen Dooks * @wanted: The clock frequency wanted. 1400d1bb41aSBen Dooks */ 1410d1bb41aSBen Dooks static unsigned int sdhci_s3c_consider_clock(struct sdhci_s3c *ourhost, 1420d1bb41aSBen Dooks unsigned int src, 1430d1bb41aSBen Dooks unsigned int wanted) 1440d1bb41aSBen Dooks { 1450d1bb41aSBen Dooks unsigned long rate; 1460d1bb41aSBen Dooks struct clk *clksrc = ourhost->clk_bus[src]; 1470d1bb41aSBen Dooks int div; 1480d1bb41aSBen Dooks 1490d1bb41aSBen Dooks if (!clksrc) 1500d1bb41aSBen Dooks return UINT_MAX; 1510d1bb41aSBen Dooks 152253e0a7cSJeongbae Seo /* 1533119936aSThomas Abraham * If controller uses a non-standard clock division, find the best clock 1543119936aSThomas Abraham * speed possible with selected clock source and skip the division. 155253e0a7cSJeongbae Seo */ 1563119936aSThomas Abraham if (ourhost->host->quirks & SDHCI_QUIRK_NONSTANDARD_CLOCK) { 157253e0a7cSJeongbae Seo rate = clk_round_rate(clksrc, wanted); 158253e0a7cSJeongbae Seo return wanted - rate; 159253e0a7cSJeongbae Seo } 160253e0a7cSJeongbae Seo 1610d1bb41aSBen Dooks rate = clk_get_rate(clksrc); 1620d1bb41aSBen Dooks 1630d1bb41aSBen Dooks for (div = 1; div < 256; div *= 2) { 1640d1bb41aSBen Dooks if ((rate / div) <= wanted) 1650d1bb41aSBen Dooks break; 1660d1bb41aSBen Dooks } 1670d1bb41aSBen Dooks 1680d1bb41aSBen Dooks dev_dbg(&ourhost->pdev->dev, "clk %d: rate %ld, want %d, got %ld\n", 1690d1bb41aSBen Dooks src, rate, wanted, rate / div); 1700d1bb41aSBen Dooks 1712ad0b249SJingoo Han return wanted - (rate / div); 1720d1bb41aSBen Dooks } 1730d1bb41aSBen Dooks 1740d1bb41aSBen Dooks /** 1750d1bb41aSBen Dooks * sdhci_s3c_set_clock - callback on clock change 1760d1bb41aSBen Dooks * @host: The SDHCI host being changed 1770d1bb41aSBen Dooks * @clock: The clock rate being requested. 1780d1bb41aSBen Dooks * 1790d1bb41aSBen Dooks * When the card's clock is going to be changed, look at the new frequency 1800d1bb41aSBen Dooks * and find the best clock source to go with it. 1810d1bb41aSBen Dooks */ 1820d1bb41aSBen Dooks static void sdhci_s3c_set_clock(struct sdhci_host *host, unsigned int clock) 1830d1bb41aSBen Dooks { 1840d1bb41aSBen Dooks struct sdhci_s3c *ourhost = to_s3c(host); 1850d1bb41aSBen Dooks unsigned int best = UINT_MAX; 1860d1bb41aSBen Dooks unsigned int delta; 1870d1bb41aSBen Dooks int best_src = 0; 1880d1bb41aSBen Dooks int src; 1890d1bb41aSBen Dooks u32 ctrl; 1900d1bb41aSBen Dooks 1910d1bb41aSBen Dooks /* don't bother if the clock is going off. */ 1920d1bb41aSBen Dooks if (clock == 0) 1930d1bb41aSBen Dooks return; 1940d1bb41aSBen Dooks 1950d1bb41aSBen Dooks for (src = 0; src < MAX_BUS_CLK; src++) { 1960d1bb41aSBen Dooks delta = sdhci_s3c_consider_clock(ourhost, src, clock); 1970d1bb41aSBen Dooks if (delta < best) { 1980d1bb41aSBen Dooks best = delta; 1990d1bb41aSBen Dooks best_src = src; 2000d1bb41aSBen Dooks } 2010d1bb41aSBen Dooks } 2020d1bb41aSBen Dooks 2030d1bb41aSBen Dooks dev_dbg(&ourhost->pdev->dev, 2040d1bb41aSBen Dooks "selected source %d, clock %d, delta %d\n", 2050d1bb41aSBen Dooks best_src, clock, best); 2060d1bb41aSBen Dooks 2070d1bb41aSBen Dooks /* select the new clock source */ 2080d1bb41aSBen Dooks if (ourhost->cur_clk != best_src) { 2090d1bb41aSBen Dooks struct clk *clk = ourhost->clk_bus[best_src]; 2100d1bb41aSBen Dooks 2110f310a05SThomas Abraham clk_prepare_enable(clk); 2120f310a05SThomas Abraham clk_disable_unprepare(ourhost->clk_bus[ourhost->cur_clk]); 213e684c468SChander Kashyap 2140d1bb41aSBen Dooks /* turn clock off to card before changing clock source */ 2150d1bb41aSBen Dooks writew(0, host->ioaddr + SDHCI_CLOCK_CONTROL); 2160d1bb41aSBen Dooks 2170d1bb41aSBen Dooks ourhost->cur_clk = best_src; 2180d1bb41aSBen Dooks host->max_clk = clk_get_rate(clk); 2190d1bb41aSBen Dooks 2200d1bb41aSBen Dooks ctrl = readl(host->ioaddr + S3C_SDHCI_CONTROL2); 2210d1bb41aSBen Dooks ctrl &= ~S3C_SDHCI_CTRL2_SELBASECLK_MASK; 2220d1bb41aSBen Dooks ctrl |= best_src << S3C_SDHCI_CTRL2_SELBASECLK_SHIFT; 2230d1bb41aSBen Dooks writel(ctrl, host->ioaddr + S3C_SDHCI_CONTROL2); 2240d1bb41aSBen Dooks } 2250d1bb41aSBen Dooks 2266fe47179SThomas Abraham /* reprogram default hardware configuration */ 2276fe47179SThomas Abraham writel(S3C64XX_SDHCI_CONTROL4_DRIVE_9mA, 2286fe47179SThomas Abraham host->ioaddr + S3C64XX_SDHCI_CONTROL4); 2290d1bb41aSBen Dooks 2306fe47179SThomas Abraham ctrl = readl(host->ioaddr + S3C_SDHCI_CONTROL2); 2316fe47179SThomas Abraham ctrl |= (S3C64XX_SDHCI_CTRL2_ENSTAASYNCCLR | 2326fe47179SThomas Abraham S3C64XX_SDHCI_CTRL2_ENCMDCNFMSK | 2336fe47179SThomas Abraham S3C_SDHCI_CTRL2_ENFBCLKRX | 2346fe47179SThomas Abraham S3C_SDHCI_CTRL2_DFCNT_NONE | 2356fe47179SThomas Abraham S3C_SDHCI_CTRL2_ENCLKOUTHOLD); 2366fe47179SThomas Abraham writel(ctrl, host->ioaddr + S3C_SDHCI_CONTROL2); 2370d1bb41aSBen Dooks 2386fe47179SThomas Abraham /* reconfigure the controller for new clock rate */ 2396fe47179SThomas Abraham ctrl = (S3C_SDHCI_CTRL3_FCSEL1 | S3C_SDHCI_CTRL3_FCSEL0); 2406fe47179SThomas Abraham if (clock < 25 * 1000000) 2416fe47179SThomas Abraham ctrl |= (S3C_SDHCI_CTRL3_FCSEL3 | S3C_SDHCI_CTRL3_FCSEL2); 2426fe47179SThomas Abraham writel(ctrl, host->ioaddr + S3C_SDHCI_CONTROL3); 2430d1bb41aSBen Dooks } 2440d1bb41aSBen Dooks 245ce5f036bSMarek Szyprowski /** 246ce5f036bSMarek Szyprowski * sdhci_s3c_get_min_clock - callback to get minimal supported clock value 247ce5f036bSMarek Szyprowski * @host: The SDHCI host being queried 248ce5f036bSMarek Szyprowski * 249ce5f036bSMarek Szyprowski * To init mmc host properly a minimal clock value is needed. For high system 250ce5f036bSMarek Szyprowski * bus clock's values the standard formula gives values out of allowed range. 251ce5f036bSMarek Szyprowski * The clock still can be set to lower values, if clock source other then 252ce5f036bSMarek Szyprowski * system bus is selected. 253ce5f036bSMarek Szyprowski */ 254ce5f036bSMarek Szyprowski static unsigned int sdhci_s3c_get_min_clock(struct sdhci_host *host) 255ce5f036bSMarek Szyprowski { 256ce5f036bSMarek Szyprowski struct sdhci_s3c *ourhost = to_s3c(host); 257ce5f036bSMarek Szyprowski unsigned int delta, min = UINT_MAX; 258ce5f036bSMarek Szyprowski int src; 259ce5f036bSMarek Szyprowski 260ce5f036bSMarek Szyprowski for (src = 0; src < MAX_BUS_CLK; src++) { 261ce5f036bSMarek Szyprowski delta = sdhci_s3c_consider_clock(ourhost, src, 0); 262ce5f036bSMarek Szyprowski if (delta == UINT_MAX) 263ce5f036bSMarek Szyprowski continue; 264ce5f036bSMarek Szyprowski /* delta is a negative value in this case */ 265ce5f036bSMarek Szyprowski if (-delta < min) 266ce5f036bSMarek Szyprowski min = -delta; 267ce5f036bSMarek Szyprowski } 268ce5f036bSMarek Szyprowski return min; 269ce5f036bSMarek Szyprowski } 270ce5f036bSMarek Szyprowski 271253e0a7cSJeongbae Seo /* sdhci_cmu_get_max_clk - callback to get maximum clock frequency.*/ 272253e0a7cSJeongbae Seo static unsigned int sdhci_cmu_get_max_clock(struct sdhci_host *host) 273253e0a7cSJeongbae Seo { 274253e0a7cSJeongbae Seo struct sdhci_s3c *ourhost = to_s3c(host); 275253e0a7cSJeongbae Seo 276253e0a7cSJeongbae Seo return clk_round_rate(ourhost->clk_bus[ourhost->cur_clk], UINT_MAX); 277253e0a7cSJeongbae Seo } 278253e0a7cSJeongbae Seo 279253e0a7cSJeongbae Seo /* sdhci_cmu_get_min_clock - callback to get minimal supported clock value. */ 280253e0a7cSJeongbae Seo static unsigned int sdhci_cmu_get_min_clock(struct sdhci_host *host) 281253e0a7cSJeongbae Seo { 282253e0a7cSJeongbae Seo struct sdhci_s3c *ourhost = to_s3c(host); 283253e0a7cSJeongbae Seo 284253e0a7cSJeongbae Seo /* 285253e0a7cSJeongbae Seo * initial clock can be in the frequency range of 286253e0a7cSJeongbae Seo * 100KHz-400KHz, so we set it as max value. 287253e0a7cSJeongbae Seo */ 288253e0a7cSJeongbae Seo return clk_round_rate(ourhost->clk_bus[ourhost->cur_clk], 400000); 289253e0a7cSJeongbae Seo } 290253e0a7cSJeongbae Seo 291253e0a7cSJeongbae Seo /* sdhci_cmu_set_clock - callback on clock change.*/ 292253e0a7cSJeongbae Seo static void sdhci_cmu_set_clock(struct sdhci_host *host, unsigned int clock) 293253e0a7cSJeongbae Seo { 294253e0a7cSJeongbae Seo struct sdhci_s3c *ourhost = to_s3c(host); 2952ad0b249SJingoo Han struct device *dev = &ourhost->pdev->dev; 2963119936aSThomas Abraham unsigned long timeout; 2973119936aSThomas Abraham u16 clk = 0; 298253e0a7cSJeongbae Seo 2997ef2a5e2SJaehoon Chung /* If the clock is going off, set to 0 at clock control register */ 3007ef2a5e2SJaehoon Chung if (clock == 0) { 3017ef2a5e2SJaehoon Chung sdhci_writew(host, 0, SDHCI_CLOCK_CONTROL); 3027ef2a5e2SJaehoon Chung host->clock = clock; 303253e0a7cSJeongbae Seo return; 3047ef2a5e2SJaehoon Chung } 305253e0a7cSJeongbae Seo 306253e0a7cSJeongbae Seo sdhci_s3c_set_clock(host, clock); 307253e0a7cSJeongbae Seo 308253e0a7cSJeongbae Seo clk_set_rate(ourhost->clk_bus[ourhost->cur_clk], clock); 309253e0a7cSJeongbae Seo 310253e0a7cSJeongbae Seo host->clock = clock; 3113119936aSThomas Abraham 3123119936aSThomas Abraham clk = SDHCI_CLOCK_INT_EN; 3133119936aSThomas Abraham sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL); 3143119936aSThomas Abraham 3153119936aSThomas Abraham /* Wait max 20 ms */ 3163119936aSThomas Abraham timeout = 20; 3173119936aSThomas Abraham while (!((clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL)) 3183119936aSThomas Abraham & SDHCI_CLOCK_INT_STABLE)) { 3193119936aSThomas Abraham if (timeout == 0) { 3202ad0b249SJingoo Han dev_err(dev, "%s: Internal clock never stabilised.\n", 3212ad0b249SJingoo Han mmc_hostname(host->mmc)); 3223119936aSThomas Abraham return; 3233119936aSThomas Abraham } 3243119936aSThomas Abraham timeout--; 3253119936aSThomas Abraham mdelay(1); 3263119936aSThomas Abraham } 3273119936aSThomas Abraham 3283119936aSThomas Abraham clk |= SDHCI_CLOCK_CARD_EN; 3293119936aSThomas Abraham sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL); 330253e0a7cSJeongbae Seo } 331253e0a7cSJeongbae Seo 332548f07d2SJaehoon Chung /** 3337bc088d3SSascha Hauer * sdhci_s3c_platform_bus_width - support 8bit buswidth 334548f07d2SJaehoon Chung * @host: The SDHCI host being queried 335548f07d2SJaehoon Chung * @width: MMC_BUS_WIDTH_ macro for the bus width being requested 336548f07d2SJaehoon Chung * 337548f07d2SJaehoon Chung * We have 8-bit width support but is not a v3 controller. 3387bc088d3SSascha Hauer * So we add platform_bus_width() and support 8bit width. 339548f07d2SJaehoon Chung */ 3407bc088d3SSascha Hauer static int sdhci_s3c_platform_bus_width(struct sdhci_host *host, int width) 341548f07d2SJaehoon Chung { 342548f07d2SJaehoon Chung u8 ctrl; 343548f07d2SJaehoon Chung 344548f07d2SJaehoon Chung ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL); 345548f07d2SJaehoon Chung 346548f07d2SJaehoon Chung switch (width) { 347548f07d2SJaehoon Chung case MMC_BUS_WIDTH_8: 348548f07d2SJaehoon Chung ctrl |= SDHCI_CTRL_8BITBUS; 349548f07d2SJaehoon Chung ctrl &= ~SDHCI_CTRL_4BITBUS; 350548f07d2SJaehoon Chung break; 351548f07d2SJaehoon Chung case MMC_BUS_WIDTH_4: 352548f07d2SJaehoon Chung ctrl |= SDHCI_CTRL_4BITBUS; 353548f07d2SJaehoon Chung ctrl &= ~SDHCI_CTRL_8BITBUS; 354548f07d2SJaehoon Chung break; 355548f07d2SJaehoon Chung default: 35649bb1e61SGirish K S ctrl &= ~SDHCI_CTRL_4BITBUS; 35749bb1e61SGirish K S ctrl &= ~SDHCI_CTRL_8BITBUS; 358548f07d2SJaehoon Chung break; 359548f07d2SJaehoon Chung } 360548f07d2SJaehoon Chung 361548f07d2SJaehoon Chung sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL); 362548f07d2SJaehoon Chung 363548f07d2SJaehoon Chung return 0; 364548f07d2SJaehoon Chung } 365548f07d2SJaehoon Chung 3660d1bb41aSBen Dooks static struct sdhci_ops sdhci_s3c_ops = { 3670d1bb41aSBen Dooks .get_max_clock = sdhci_s3c_get_max_clk, 3680d1bb41aSBen Dooks .set_clock = sdhci_s3c_set_clock, 369ce5f036bSMarek Szyprowski .get_min_clock = sdhci_s3c_get_min_clock, 3707bc088d3SSascha Hauer .platform_bus_width = sdhci_s3c_platform_bus_width, 3710d1bb41aSBen Dooks }; 3720d1bb41aSBen Dooks 37317866e14SMarek Szyprowski static void sdhci_s3c_notify_change(struct platform_device *dev, int state) 37417866e14SMarek Szyprowski { 37517866e14SMarek Szyprowski struct sdhci_host *host = platform_get_drvdata(dev); 3764577f77bSSachin Kamat #ifdef CONFIG_PM_RUNTIME 377fe007c02SHeiko Stübner struct sdhci_s3c *sc = sdhci_priv(host); 3784577f77bSSachin Kamat #endif 37906fe577fSMarek Szyprowski unsigned long flags; 38006fe577fSMarek Szyprowski 38117866e14SMarek Szyprowski if (host) { 38206fe577fSMarek Szyprowski spin_lock_irqsave(&host->lock, flags); 38317866e14SMarek Szyprowski if (state) { 38417866e14SMarek Szyprowski dev_dbg(&dev->dev, "card inserted.\n"); 385fe007c02SHeiko Stübner #ifdef CONFIG_PM_RUNTIME 386fe007c02SHeiko Stübner clk_prepare_enable(sc->clk_io); 387fe007c02SHeiko Stübner #endif 38817866e14SMarek Szyprowski host->flags &= ~SDHCI_DEVICE_DEAD; 38917866e14SMarek Szyprowski host->quirks |= SDHCI_QUIRK_BROKEN_CARD_DETECTION; 39017866e14SMarek Szyprowski } else { 39117866e14SMarek Szyprowski dev_dbg(&dev->dev, "card removed.\n"); 39217866e14SMarek Szyprowski host->flags |= SDHCI_DEVICE_DEAD; 39317866e14SMarek Szyprowski host->quirks &= ~SDHCI_QUIRK_BROKEN_CARD_DETECTION; 394fe007c02SHeiko Stübner #ifdef CONFIG_PM_RUNTIME 395fe007c02SHeiko Stübner clk_disable_unprepare(sc->clk_io); 396fe007c02SHeiko Stübner #endif 39717866e14SMarek Szyprowski } 398f522886eSKyungmin Park tasklet_schedule(&host->card_tasklet); 39906fe577fSMarek Szyprowski spin_unlock_irqrestore(&host->lock, flags); 40017866e14SMarek Szyprowski } 40117866e14SMarek Szyprowski } 40217866e14SMarek Szyprowski 40317866e14SMarek Szyprowski static irqreturn_t sdhci_s3c_gpio_card_detect_thread(int irq, void *dev_id) 40417866e14SMarek Szyprowski { 40517866e14SMarek Szyprowski struct sdhci_s3c *sc = dev_id; 40617866e14SMarek Szyprowski int status = gpio_get_value(sc->ext_cd_gpio); 40717866e14SMarek Szyprowski if (sc->pdata->ext_cd_gpio_invert) 40817866e14SMarek Szyprowski status = !status; 40917866e14SMarek Szyprowski sdhci_s3c_notify_change(sc->pdev, status); 41017866e14SMarek Szyprowski return IRQ_HANDLED; 41117866e14SMarek Szyprowski } 41217866e14SMarek Szyprowski 41317866e14SMarek Szyprowski static void sdhci_s3c_setup_card_detect_gpio(struct sdhci_s3c *sc) 41417866e14SMarek Szyprowski { 41517866e14SMarek Szyprowski struct s3c_sdhci_platdata *pdata = sc->pdata; 41617866e14SMarek Szyprowski struct device *dev = &sc->pdev->dev; 41717866e14SMarek Szyprowski 418b1b8fea9STomasz Figa if (devm_gpio_request(dev, pdata->ext_cd_gpio, "SDHCI EXT CD") == 0) { 41917866e14SMarek Szyprowski sc->ext_cd_gpio = pdata->ext_cd_gpio; 42017866e14SMarek Szyprowski sc->ext_cd_irq = gpio_to_irq(pdata->ext_cd_gpio); 42117866e14SMarek Szyprowski if (sc->ext_cd_irq && 42217866e14SMarek Szyprowski request_threaded_irq(sc->ext_cd_irq, NULL, 42317866e14SMarek Szyprowski sdhci_s3c_gpio_card_detect_thread, 4242ad0b249SJingoo Han IRQF_TRIGGER_RISING | 4252ad0b249SJingoo Han IRQF_TRIGGER_FALLING | 4262ad0b249SJingoo Han IRQF_ONESHOT, 42717866e14SMarek Szyprowski dev_name(dev), sc) == 0) { 42817866e14SMarek Szyprowski int status = gpio_get_value(sc->ext_cd_gpio); 42917866e14SMarek Szyprowski if (pdata->ext_cd_gpio_invert) 43017866e14SMarek Szyprowski status = !status; 43117866e14SMarek Szyprowski sdhci_s3c_notify_change(sc->pdev, status); 43217866e14SMarek Szyprowski } else { 43317866e14SMarek Szyprowski dev_warn(dev, "cannot request irq for card detect\n"); 43417866e14SMarek Szyprowski sc->ext_cd_irq = 0; 43517866e14SMarek Szyprowski } 43617866e14SMarek Szyprowski } else { 43717866e14SMarek Szyprowski dev_err(dev, "cannot request gpio for card detect\n"); 43817866e14SMarek Szyprowski } 43917866e14SMarek Szyprowski } 44017866e14SMarek Szyprowski 441cd1b00ebSThomas Abraham #ifdef CONFIG_OF 442c3be1efdSBill Pemberton static int sdhci_s3c_parse_dt(struct device *dev, 443cd1b00ebSThomas Abraham struct sdhci_host *host, struct s3c_sdhci_platdata *pdata) 444cd1b00ebSThomas Abraham { 445cd1b00ebSThomas Abraham struct device_node *node = dev->of_node; 446cd1b00ebSThomas Abraham struct sdhci_s3c *ourhost = to_s3c(host); 447cd1b00ebSThomas Abraham u32 max_width; 448e19499aeSThomas Abraham int gpio; 449cd1b00ebSThomas Abraham 450cd1b00ebSThomas Abraham /* if the bus-width property is not specified, assume width as 1 */ 451cd1b00ebSThomas Abraham if (of_property_read_u32(node, "bus-width", &max_width)) 452cd1b00ebSThomas Abraham max_width = 1; 453cd1b00ebSThomas Abraham pdata->max_width = max_width; 454cd1b00ebSThomas Abraham 455cd1b00ebSThomas Abraham /* get the card detection method */ 456ab5023efSTushar Behera if (of_get_property(node, "broken-cd", NULL)) { 457cd1b00ebSThomas Abraham pdata->cd_type = S3C_SDHCI_CD_NONE; 458e19499aeSThomas Abraham return 0; 459cd1b00ebSThomas Abraham } 460cd1b00ebSThomas Abraham 461ab5023efSTushar Behera if (of_get_property(node, "non-removable", NULL)) { 462cd1b00ebSThomas Abraham pdata->cd_type = S3C_SDHCI_CD_PERMANENT; 463e19499aeSThomas Abraham return 0; 464cd1b00ebSThomas Abraham } 465cd1b00ebSThomas Abraham 466cd1b00ebSThomas Abraham gpio = of_get_named_gpio(node, "cd-gpios", 0); 467cd1b00ebSThomas Abraham if (gpio_is_valid(gpio)) { 468cd1b00ebSThomas Abraham pdata->cd_type = S3C_SDHCI_CD_GPIO; 469e19499aeSThomas Abraham pdata->ext_cd_gpio = gpio; 470e19499aeSThomas Abraham ourhost->ext_cd_gpio = -1; 471e19499aeSThomas Abraham if (of_get_property(node, "cd-inverted", NULL)) 472e19499aeSThomas Abraham pdata->ext_cd_gpio_invert = 1; 473e19499aeSThomas Abraham return 0; 474cd1b00ebSThomas Abraham } else if (gpio != -ENOENT) { 475cd1b00ebSThomas Abraham dev_err(dev, "invalid card detect gpio specified\n"); 476cd1b00ebSThomas Abraham return -EINVAL; 477cd1b00ebSThomas Abraham } 478cd1b00ebSThomas Abraham 479b96efccbSTomasz Figa /* assuming internal card detect that will be configured by pinctrl */ 480b96efccbSTomasz Figa pdata->cd_type = S3C_SDHCI_CD_INTERNAL; 481cd1b00ebSThomas Abraham return 0; 482cd1b00ebSThomas Abraham } 483cd1b00ebSThomas Abraham #else 484c3be1efdSBill Pemberton static int sdhci_s3c_parse_dt(struct device *dev, 485cd1b00ebSThomas Abraham struct sdhci_host *host, struct s3c_sdhci_platdata *pdata) 486cd1b00ebSThomas Abraham { 487cd1b00ebSThomas Abraham return -EINVAL; 488cd1b00ebSThomas Abraham } 489cd1b00ebSThomas Abraham #endif 490cd1b00ebSThomas Abraham 491cd1b00ebSThomas Abraham static const struct of_device_id sdhci_s3c_dt_match[]; 492cd1b00ebSThomas Abraham 4933119936aSThomas Abraham static inline struct sdhci_s3c_drv_data *sdhci_s3c_get_driver_data( 4943119936aSThomas Abraham struct platform_device *pdev) 4953119936aSThomas Abraham { 496cd1b00ebSThomas Abraham #ifdef CONFIG_OF 497cd1b00ebSThomas Abraham if (pdev->dev.of_node) { 498cd1b00ebSThomas Abraham const struct of_device_id *match; 499cd1b00ebSThomas Abraham match = of_match_node(sdhci_s3c_dt_match, pdev->dev.of_node); 500cd1b00ebSThomas Abraham return (struct sdhci_s3c_drv_data *)match->data; 501cd1b00ebSThomas Abraham } 502cd1b00ebSThomas Abraham #endif 5033119936aSThomas Abraham return (struct sdhci_s3c_drv_data *) 5043119936aSThomas Abraham platform_get_device_id(pdev)->driver_data; 5053119936aSThomas Abraham } 5063119936aSThomas Abraham 507c3be1efdSBill Pemberton static int sdhci_s3c_probe(struct platform_device *pdev) 5080d1bb41aSBen Dooks { 5091d4dc338SThomas Abraham struct s3c_sdhci_platdata *pdata; 5103119936aSThomas Abraham struct sdhci_s3c_drv_data *drv_data; 5110d1bb41aSBen Dooks struct device *dev = &pdev->dev; 5120d1bb41aSBen Dooks struct sdhci_host *host; 5130d1bb41aSBen Dooks struct sdhci_s3c *sc; 5140d1bb41aSBen Dooks struct resource *res; 5150d1bb41aSBen Dooks int ret, irq, ptr, clks; 5160d1bb41aSBen Dooks 517cd1b00ebSThomas Abraham if (!pdev->dev.platform_data && !pdev->dev.of_node) { 5180d1bb41aSBen Dooks dev_err(dev, "no device data specified\n"); 5190d1bb41aSBen Dooks return -ENOENT; 5200d1bb41aSBen Dooks } 5210d1bb41aSBen Dooks 5220d1bb41aSBen Dooks irq = platform_get_irq(pdev, 0); 5230d1bb41aSBen Dooks if (irq < 0) { 5240d1bb41aSBen Dooks dev_err(dev, "no irq specified\n"); 5250d1bb41aSBen Dooks return irq; 5260d1bb41aSBen Dooks } 5270d1bb41aSBen Dooks 5280d1bb41aSBen Dooks host = sdhci_alloc_host(dev, sizeof(struct sdhci_s3c)); 5290d1bb41aSBen Dooks if (IS_ERR(host)) { 5300d1bb41aSBen Dooks dev_err(dev, "sdhci_alloc_host() failed\n"); 5310d1bb41aSBen Dooks return PTR_ERR(host); 5320d1bb41aSBen Dooks } 533cd1b00ebSThomas Abraham sc = sdhci_priv(host); 5340d1bb41aSBen Dooks 5351d4dc338SThomas Abraham pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); 5361d4dc338SThomas Abraham if (!pdata) { 5371d4dc338SThomas Abraham ret = -ENOMEM; 538b1b8fea9STomasz Figa goto err_pdata_io_clk; 5391d4dc338SThomas Abraham } 540cd1b00ebSThomas Abraham 541cd1b00ebSThomas Abraham if (pdev->dev.of_node) { 542cd1b00ebSThomas Abraham ret = sdhci_s3c_parse_dt(&pdev->dev, host, pdata); 543cd1b00ebSThomas Abraham if (ret) 544b1b8fea9STomasz Figa goto err_pdata_io_clk; 545cd1b00ebSThomas Abraham } else { 5461d4dc338SThomas Abraham memcpy(pdata, pdev->dev.platform_data, sizeof(*pdata)); 547cd1b00ebSThomas Abraham sc->ext_cd_gpio = -1; /* invalid gpio number */ 548cd1b00ebSThomas Abraham } 5491d4dc338SThomas Abraham 5503119936aSThomas Abraham drv_data = sdhci_s3c_get_driver_data(pdev); 5510d1bb41aSBen Dooks 5520d1bb41aSBen Dooks sc->host = host; 5530d1bb41aSBen Dooks sc->pdev = pdev; 5540d1bb41aSBen Dooks sc->pdata = pdata; 5550d1bb41aSBen Dooks 5560d1bb41aSBen Dooks platform_set_drvdata(pdev, host); 5570d1bb41aSBen Dooks 5583aaf7ba7SJingoo Han sc->clk_io = devm_clk_get(dev, "hsmmc"); 5590d1bb41aSBen Dooks if (IS_ERR(sc->clk_io)) { 5600d1bb41aSBen Dooks dev_err(dev, "failed to get io clock\n"); 5610d1bb41aSBen Dooks ret = PTR_ERR(sc->clk_io); 562b1b8fea9STomasz Figa goto err_pdata_io_clk; 5630d1bb41aSBen Dooks } 5640d1bb41aSBen Dooks 5650d1bb41aSBen Dooks /* enable the local io clock and keep it running for the moment. */ 5660f310a05SThomas Abraham clk_prepare_enable(sc->clk_io); 5670d1bb41aSBen Dooks 5680d1bb41aSBen Dooks for (clks = 0, ptr = 0; ptr < MAX_BUS_CLK; ptr++) { 5690d1bb41aSBen Dooks struct clk *clk; 5704346b6d9SRajeshwari Shinde char name[14]; 5710d1bb41aSBen Dooks 5724346b6d9SRajeshwari Shinde snprintf(name, 14, "mmc_busclk.%d", ptr); 5733aaf7ba7SJingoo Han clk = devm_clk_get(dev, name); 5742ad0b249SJingoo Han if (IS_ERR(clk)) 5750d1bb41aSBen Dooks continue; 5760d1bb41aSBen Dooks 5770d1bb41aSBen Dooks clks++; 5780d1bb41aSBen Dooks sc->clk_bus[ptr] = clk; 579253e0a7cSJeongbae Seo 580253e0a7cSJeongbae Seo /* 581253e0a7cSJeongbae Seo * save current clock index to know which clock bus 582253e0a7cSJeongbae Seo * is used later in overriding functions. 583253e0a7cSJeongbae Seo */ 584253e0a7cSJeongbae Seo sc->cur_clk = ptr; 585253e0a7cSJeongbae Seo 5860d1bb41aSBen Dooks dev_info(dev, "clock source %d: %s (%ld Hz)\n", 5870d1bb41aSBen Dooks ptr, name, clk_get_rate(clk)); 5880d1bb41aSBen Dooks } 5890d1bb41aSBen Dooks 5900d1bb41aSBen Dooks if (clks == 0) { 5910d1bb41aSBen Dooks dev_err(dev, "failed to find any bus clocks\n"); 5920d1bb41aSBen Dooks ret = -ENOENT; 5930d1bb41aSBen Dooks goto err_no_busclks; 5940d1bb41aSBen Dooks } 5950d1bb41aSBen Dooks 5962abeb5c5SChander Kashyap #ifndef CONFIG_PM_RUNTIME 5970f310a05SThomas Abraham clk_prepare_enable(sc->clk_bus[sc->cur_clk]); 5982abeb5c5SChander Kashyap #endif 599e684c468SChander Kashyap 6009bda6da7SJulia Lawall res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 601a3e2cd7fSThierry Reding host->ioaddr = devm_ioremap_resource(&pdev->dev, res); 602a3e2cd7fSThierry Reding if (IS_ERR(host->ioaddr)) { 603a3e2cd7fSThierry Reding ret = PTR_ERR(host->ioaddr); 6040d1bb41aSBen Dooks goto err_req_regs; 6050d1bb41aSBen Dooks } 6060d1bb41aSBen Dooks 6070d1bb41aSBen Dooks /* Ensure we have minimal gpio selected CMD/CLK/Detect */ 6080d1bb41aSBen Dooks if (pdata->cfg_gpio) 6090d1bb41aSBen Dooks pdata->cfg_gpio(pdev, pdata->max_width); 6100d1bb41aSBen Dooks 6110d1bb41aSBen Dooks host->hw_name = "samsung-hsmmc"; 6120d1bb41aSBen Dooks host->ops = &sdhci_s3c_ops; 6130d1bb41aSBen Dooks host->quirks = 0; 6140d1bb41aSBen Dooks host->irq = irq; 6150d1bb41aSBen Dooks 6160d1bb41aSBen Dooks /* Setup quirks for the controller */ 617b2e75effSThomas Abraham host->quirks |= SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC; 618a1d56460SMarek Szyprowski host->quirks |= SDHCI_QUIRK_NO_HISPD_BIT; 6193119936aSThomas Abraham if (drv_data) 6203119936aSThomas Abraham host->quirks |= drv_data->sdhci_quirks; 6210d1bb41aSBen Dooks 6220d1bb41aSBen Dooks #ifndef CONFIG_MMC_SDHCI_S3C_DMA 6230d1bb41aSBen Dooks 6240d1bb41aSBen Dooks /* we currently see overruns on errors, so disable the SDMA 6250d1bb41aSBen Dooks * support as well. */ 6260d1bb41aSBen Dooks host->quirks |= SDHCI_QUIRK_BROKEN_DMA; 6270d1bb41aSBen Dooks 6280d1bb41aSBen Dooks #endif /* CONFIG_MMC_SDHCI_S3C_DMA */ 6290d1bb41aSBen Dooks 6300d1bb41aSBen Dooks /* It seems we do not get an DATA transfer complete on non-busy 6310d1bb41aSBen Dooks * transfers, not sure if this is a problem with this specific 6320d1bb41aSBen Dooks * SDHCI block, or a missing configuration that needs to be set. */ 6330d1bb41aSBen Dooks host->quirks |= SDHCI_QUIRK_NO_BUSY_IRQ; 6340d1bb41aSBen Dooks 635732f0e31SKyungmin Park /* This host supports the Auto CMD12 */ 636732f0e31SKyungmin Park host->quirks |= SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12; 637732f0e31SKyungmin Park 6387199e2b6SJaehoon Chung /* Samsung SoCs need BROKEN_ADMA_ZEROLEN_DESC */ 6397199e2b6SJaehoon Chung host->quirks |= SDHCI_QUIRK_BROKEN_ADMA_ZEROLEN_DESC; 6407199e2b6SJaehoon Chung 64117866e14SMarek Szyprowski if (pdata->cd_type == S3C_SDHCI_CD_NONE || 64217866e14SMarek Szyprowski pdata->cd_type == S3C_SDHCI_CD_PERMANENT) 64317866e14SMarek Szyprowski host->quirks |= SDHCI_QUIRK_BROKEN_CARD_DETECTION; 64417866e14SMarek Szyprowski 64517866e14SMarek Szyprowski if (pdata->cd_type == S3C_SDHCI_CD_PERMANENT) 64617866e14SMarek Szyprowski host->mmc->caps = MMC_CAP_NONREMOVABLE; 64717866e14SMarek Szyprowski 6480d22c770SThomas Abraham switch (pdata->max_width) { 6490d22c770SThomas Abraham case 8: 6500d22c770SThomas Abraham host->mmc->caps |= MMC_CAP_8_BIT_DATA; 6510d22c770SThomas Abraham case 4: 6520d22c770SThomas Abraham host->mmc->caps |= MMC_CAP_4_BIT_DATA; 6530d22c770SThomas Abraham break; 6540d22c770SThomas Abraham } 6550d22c770SThomas Abraham 656fa1773ccSSangwook Lee if (pdata->pm_caps) 657fa1773ccSSangwook Lee host->mmc->pm_caps |= pdata->pm_caps; 658fa1773ccSSangwook Lee 6590d1bb41aSBen Dooks host->quirks |= (SDHCI_QUIRK_32BIT_DMA_ADDR | 6600d1bb41aSBen Dooks SDHCI_QUIRK_32BIT_DMA_SIZE); 6610d1bb41aSBen Dooks 6623fe42e07SHyuk Lee /* HSMMC on Samsung SoCs uses SDCLK as timeout clock */ 6633fe42e07SHyuk Lee host->quirks |= SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK; 6643fe42e07SHyuk Lee 665253e0a7cSJeongbae Seo /* 666253e0a7cSJeongbae Seo * If controller does not have internal clock divider, 667253e0a7cSJeongbae Seo * we can use overriding functions instead of default. 668253e0a7cSJeongbae Seo */ 6693119936aSThomas Abraham if (host->quirks & SDHCI_QUIRK_NONSTANDARD_CLOCK) { 670253e0a7cSJeongbae Seo sdhci_s3c_ops.set_clock = sdhci_cmu_set_clock; 671253e0a7cSJeongbae Seo sdhci_s3c_ops.get_min_clock = sdhci_cmu_get_min_clock; 672253e0a7cSJeongbae Seo sdhci_s3c_ops.get_max_clock = sdhci_cmu_get_max_clock; 673253e0a7cSJeongbae Seo } 674253e0a7cSJeongbae Seo 675b3824f2cSJeongbae Seo /* It supports additional host capabilities if needed */ 676b3824f2cSJeongbae Seo if (pdata->host_caps) 677b3824f2cSJeongbae Seo host->mmc->caps |= pdata->host_caps; 678b3824f2cSJeongbae Seo 679c1c4b66dSJaehoon Chung if (pdata->host_caps2) 680c1c4b66dSJaehoon Chung host->mmc->caps2 |= pdata->host_caps2; 681c1c4b66dSJaehoon Chung 6829f4e8151SMark Brown pm_runtime_enable(&pdev->dev); 6839f4e8151SMark Brown pm_runtime_set_autosuspend_delay(&pdev->dev, 50); 6849f4e8151SMark Brown pm_runtime_use_autosuspend(&pdev->dev); 6859f4e8151SMark Brown pm_suspend_ignore_children(&pdev->dev, 1); 6869f4e8151SMark Brown 6870d1bb41aSBen Dooks ret = sdhci_add_host(host); 6880d1bb41aSBen Dooks if (ret) { 6890d1bb41aSBen Dooks dev_err(dev, "sdhci_add_host() failed\n"); 6909f4e8151SMark Brown pm_runtime_forbid(&pdev->dev); 6919f4e8151SMark Brown pm_runtime_get_noresume(&pdev->dev); 6929bda6da7SJulia Lawall goto err_req_regs; 6930d1bb41aSBen Dooks } 6940d1bb41aSBen Dooks 69517866e14SMarek Szyprowski /* The following two methods of card detection might call 69617866e14SMarek Szyprowski sdhci_s3c_notify_change() immediately, so they can be called 69717866e14SMarek Szyprowski only after sdhci_add_host(). Setup errors are ignored. */ 69817866e14SMarek Szyprowski if (pdata->cd_type == S3C_SDHCI_CD_EXTERNAL && pdata->ext_cd_init) 69917866e14SMarek Szyprowski pdata->ext_cd_init(&sdhci_s3c_notify_change); 70017866e14SMarek Szyprowski if (pdata->cd_type == S3C_SDHCI_CD_GPIO && 70117866e14SMarek Szyprowski gpio_is_valid(pdata->ext_cd_gpio)) 70217866e14SMarek Szyprowski sdhci_s3c_setup_card_detect_gpio(sc); 70317866e14SMarek Szyprowski 7042abeb5c5SChander Kashyap #ifdef CONFIG_PM_RUNTIME 7050aa55c23SSeungwon Jeon if (pdata->cd_type != S3C_SDHCI_CD_INTERNAL) 7060f310a05SThomas Abraham clk_disable_unprepare(sc->clk_io); 7072abeb5c5SChander Kashyap #endif 7080d1bb41aSBen Dooks return 0; 7090d1bb41aSBen Dooks 7100d1bb41aSBen Dooks err_req_regs: 7112abeb5c5SChander Kashyap #ifndef CONFIG_PM_RUNTIME 7120f310a05SThomas Abraham clk_disable_unprepare(sc->clk_bus[sc->cur_clk]); 7132abeb5c5SChander Kashyap #endif 7140d1bb41aSBen Dooks 7150d1bb41aSBen Dooks err_no_busclks: 7160f310a05SThomas Abraham clk_disable_unprepare(sc->clk_io); 7170d1bb41aSBen Dooks 718b1b8fea9STomasz Figa err_pdata_io_clk: 7190d1bb41aSBen Dooks sdhci_free_host(host); 7200d1bb41aSBen Dooks 7210d1bb41aSBen Dooks return ret; 7220d1bb41aSBen Dooks } 7230d1bb41aSBen Dooks 7246e0ee714SBill Pemberton static int sdhci_s3c_remove(struct platform_device *pdev) 7250d1bb41aSBen Dooks { 7269d51a6b2SMarek Szyprowski struct sdhci_host *host = platform_get_drvdata(pdev); 7279d51a6b2SMarek Szyprowski struct sdhci_s3c *sc = sdhci_priv(host); 728cd1b00ebSThomas Abraham struct s3c_sdhci_platdata *pdata = sc->pdata; 7299d51a6b2SMarek Szyprowski 73017866e14SMarek Szyprowski if (pdata->cd_type == S3C_SDHCI_CD_EXTERNAL && pdata->ext_cd_cleanup) 73117866e14SMarek Szyprowski pdata->ext_cd_cleanup(&sdhci_s3c_notify_change); 73217866e14SMarek Szyprowski 73317866e14SMarek Szyprowski if (sc->ext_cd_irq) 73417866e14SMarek Szyprowski free_irq(sc->ext_cd_irq, sc); 73517866e14SMarek Szyprowski 7362abeb5c5SChander Kashyap #ifdef CONFIG_PM_RUNTIME 7370aa55c23SSeungwon Jeon if (pdata->cd_type != S3C_SDHCI_CD_INTERNAL) 7380f310a05SThomas Abraham clk_prepare_enable(sc->clk_io); 7392abeb5c5SChander Kashyap #endif 7409d51a6b2SMarek Szyprowski sdhci_remove_host(host, 1); 7419d51a6b2SMarek Szyprowski 742387a8cbdSChander Kashyap pm_runtime_dont_use_autosuspend(&pdev->dev); 7439f4e8151SMark Brown pm_runtime_disable(&pdev->dev); 7449f4e8151SMark Brown 7452abeb5c5SChander Kashyap #ifndef CONFIG_PM_RUNTIME 7460f310a05SThomas Abraham clk_disable_unprepare(sc->clk_bus[sc->cur_clk]); 7472abeb5c5SChander Kashyap #endif 7480f310a05SThomas Abraham clk_disable_unprepare(sc->clk_io); 7499d51a6b2SMarek Szyprowski 7509d51a6b2SMarek Szyprowski sdhci_free_host(host); 7519d51a6b2SMarek Szyprowski 7520d1bb41aSBen Dooks return 0; 7530d1bb41aSBen Dooks } 7540d1bb41aSBen Dooks 755d5e9c02cSMark Brown #ifdef CONFIG_PM_SLEEP 75629495aa0SManuel Lauss static int sdhci_s3c_suspend(struct device *dev) 7570d1bb41aSBen Dooks { 75829495aa0SManuel Lauss struct sdhci_host *host = dev_get_drvdata(dev); 7590d1bb41aSBen Dooks 76029495aa0SManuel Lauss return sdhci_suspend_host(host); 7610d1bb41aSBen Dooks } 7620d1bb41aSBen Dooks 76329495aa0SManuel Lauss static int sdhci_s3c_resume(struct device *dev) 7640d1bb41aSBen Dooks { 76529495aa0SManuel Lauss struct sdhci_host *host = dev_get_drvdata(dev); 7660d1bb41aSBen Dooks 76765d13516SWonil Choi return sdhci_resume_host(host); 7680d1bb41aSBen Dooks } 769d5e9c02cSMark Brown #endif 7700d1bb41aSBen Dooks 7719f4e8151SMark Brown #ifdef CONFIG_PM_RUNTIME 7729f4e8151SMark Brown static int sdhci_s3c_runtime_suspend(struct device *dev) 7739f4e8151SMark Brown { 7749f4e8151SMark Brown struct sdhci_host *host = dev_get_drvdata(dev); 7752abeb5c5SChander Kashyap struct sdhci_s3c *ourhost = to_s3c(host); 7762abeb5c5SChander Kashyap struct clk *busclk = ourhost->clk_io; 7772abeb5c5SChander Kashyap int ret; 7789f4e8151SMark Brown 7792abeb5c5SChander Kashyap ret = sdhci_runtime_suspend_host(host); 7802abeb5c5SChander Kashyap 7810f310a05SThomas Abraham clk_disable_unprepare(ourhost->clk_bus[ourhost->cur_clk]); 7820f310a05SThomas Abraham clk_disable_unprepare(busclk); 7832abeb5c5SChander Kashyap return ret; 7849f4e8151SMark Brown } 7859f4e8151SMark Brown 7869f4e8151SMark Brown static int sdhci_s3c_runtime_resume(struct device *dev) 7879f4e8151SMark Brown { 7889f4e8151SMark Brown struct sdhci_host *host = dev_get_drvdata(dev); 7892abeb5c5SChander Kashyap struct sdhci_s3c *ourhost = to_s3c(host); 7902abeb5c5SChander Kashyap struct clk *busclk = ourhost->clk_io; 7912abeb5c5SChander Kashyap int ret; 7929f4e8151SMark Brown 7930f310a05SThomas Abraham clk_prepare_enable(busclk); 7940f310a05SThomas Abraham clk_prepare_enable(ourhost->clk_bus[ourhost->cur_clk]); 7952abeb5c5SChander Kashyap ret = sdhci_runtime_resume_host(host); 7962abeb5c5SChander Kashyap return ret; 7979f4e8151SMark Brown } 7989f4e8151SMark Brown #endif 7999f4e8151SMark Brown 800d5e9c02cSMark Brown #ifdef CONFIG_PM 80129495aa0SManuel Lauss static const struct dev_pm_ops sdhci_s3c_pmops = { 802d5e9c02cSMark Brown SET_SYSTEM_SLEEP_PM_OPS(sdhci_s3c_suspend, sdhci_s3c_resume) 8039f4e8151SMark Brown SET_RUNTIME_PM_OPS(sdhci_s3c_runtime_suspend, sdhci_s3c_runtime_resume, 8049f4e8151SMark Brown NULL) 80529495aa0SManuel Lauss }; 80629495aa0SManuel Lauss 80729495aa0SManuel Lauss #define SDHCI_S3C_PMOPS (&sdhci_s3c_pmops) 80829495aa0SManuel Lauss 8090d1bb41aSBen Dooks #else 81029495aa0SManuel Lauss #define SDHCI_S3C_PMOPS NULL 8110d1bb41aSBen Dooks #endif 8120d1bb41aSBen Dooks 8133119936aSThomas Abraham #if defined(CONFIG_CPU_EXYNOS4210) || defined(CONFIG_SOC_EXYNOS4212) 8143119936aSThomas Abraham static struct sdhci_s3c_drv_data exynos4_sdhci_drv_data = { 8153119936aSThomas Abraham .sdhci_quirks = SDHCI_QUIRK_NONSTANDARD_CLOCK, 8163119936aSThomas Abraham }; 8173119936aSThomas Abraham #define EXYNOS4_SDHCI_DRV_DATA ((kernel_ulong_t)&exynos4_sdhci_drv_data) 8183119936aSThomas Abraham #else 8193119936aSThomas Abraham #define EXYNOS4_SDHCI_DRV_DATA ((kernel_ulong_t)NULL) 8203119936aSThomas Abraham #endif 8213119936aSThomas Abraham 8223119936aSThomas Abraham static struct platform_device_id sdhci_s3c_driver_ids[] = { 8233119936aSThomas Abraham { 8243119936aSThomas Abraham .name = "s3c-sdhci", 8253119936aSThomas Abraham .driver_data = (kernel_ulong_t)NULL, 8263119936aSThomas Abraham }, { 8273119936aSThomas Abraham .name = "exynos4-sdhci", 8283119936aSThomas Abraham .driver_data = EXYNOS4_SDHCI_DRV_DATA, 8293119936aSThomas Abraham }, 8303119936aSThomas Abraham { } 8313119936aSThomas Abraham }; 8323119936aSThomas Abraham MODULE_DEVICE_TABLE(platform, sdhci_s3c_driver_ids); 8333119936aSThomas Abraham 834cd1b00ebSThomas Abraham #ifdef CONFIG_OF 835cd1b00ebSThomas Abraham static const struct of_device_id sdhci_s3c_dt_match[] = { 836cd1b00ebSThomas Abraham { .compatible = "samsung,s3c6410-sdhci", }, 837cd1b00ebSThomas Abraham { .compatible = "samsung,exynos4210-sdhci", 838cd1b00ebSThomas Abraham .data = (void *)EXYNOS4_SDHCI_DRV_DATA }, 839cd1b00ebSThomas Abraham {}, 840cd1b00ebSThomas Abraham }; 841cd1b00ebSThomas Abraham MODULE_DEVICE_TABLE(of, sdhci_s3c_dt_match); 842cd1b00ebSThomas Abraham #endif 843cd1b00ebSThomas Abraham 8440d1bb41aSBen Dooks static struct platform_driver sdhci_s3c_driver = { 8450d1bb41aSBen Dooks .probe = sdhci_s3c_probe, 8460433c143SBill Pemberton .remove = sdhci_s3c_remove, 8473119936aSThomas Abraham .id_table = sdhci_s3c_driver_ids, 8480d1bb41aSBen Dooks .driver = { 8490d1bb41aSBen Dooks .owner = THIS_MODULE, 8500d1bb41aSBen Dooks .name = "s3c-sdhci", 851cd1b00ebSThomas Abraham .of_match_table = of_match_ptr(sdhci_s3c_dt_match), 85229495aa0SManuel Lauss .pm = SDHCI_S3C_PMOPS, 8530d1bb41aSBen Dooks }, 8540d1bb41aSBen Dooks }; 8550d1bb41aSBen Dooks 856d1f81a64SAxel Lin module_platform_driver(sdhci_s3c_driver); 8570d1bb41aSBen Dooks 8580d1bb41aSBen Dooks MODULE_DESCRIPTION("Samsung SDHCI (HSMMC) glue"); 8590d1bb41aSBen Dooks MODULE_AUTHOR("Ben Dooks, <ben@simtec.co.uk>"); 8600d1bb41aSBen Dooks MODULE_LICENSE("GPL v2"); 8610d1bb41aSBen Dooks MODULE_ALIAS("platform:s3c-sdhci"); 862