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> 185a0e3ad6STejun Heo #include <linux/slab.h> 190d1bb41aSBen Dooks #include <linux/clk.h> 200d1bb41aSBen Dooks #include <linux/io.h> 2117866e14SMarek Szyprowski #include <linux/gpio.h> 2255156d24SMark Brown #include <linux/module.h> 23d5e9c02cSMark Brown #include <linux/of.h> 24d5e9c02cSMark Brown #include <linux/of_gpio.h> 25d5e9c02cSMark Brown #include <linux/pm.h> 269f4e8151SMark Brown #include <linux/pm_runtime.h> 270d1bb41aSBen Dooks 280d1bb41aSBen Dooks #include <linux/mmc/host.h> 290d1bb41aSBen Dooks 300d1bb41aSBen Dooks #include <plat/sdhci.h> 310d1bb41aSBen Dooks #include <plat/regs-sdhci.h> 320d1bb41aSBen Dooks 330d1bb41aSBen Dooks #include "sdhci.h" 340d1bb41aSBen Dooks 350d1bb41aSBen Dooks #define MAX_BUS_CLK (4) 360d1bb41aSBen Dooks 37cd1b00ebSThomas Abraham /* Number of gpio's used is max data bus width + command and clock lines */ 38cd1b00ebSThomas Abraham #define NUM_GPIOS(x) (x + 2) 39cd1b00ebSThomas Abraham 400d1bb41aSBen Dooks /** 410d1bb41aSBen Dooks * struct sdhci_s3c - S3C SDHCI instance 420d1bb41aSBen Dooks * @host: The SDHCI host created 430d1bb41aSBen Dooks * @pdev: The platform device we where created from. 440d1bb41aSBen Dooks * @ioarea: The resource created when we claimed the IO area. 450d1bb41aSBen Dooks * @pdata: The platform data for this controller. 460d1bb41aSBen Dooks * @cur_clk: The index of the current bus clock. 47cd1b00ebSThomas Abraham * @gpios: List of gpio numbers parsed from device tree. 480d1bb41aSBen Dooks * @clk_io: The clock for the internal bus interface. 490d1bb41aSBen Dooks * @clk_bus: The clocks that are available for the SD/MMC bus clock. 500d1bb41aSBen Dooks */ 510d1bb41aSBen Dooks struct sdhci_s3c { 520d1bb41aSBen Dooks struct sdhci_host *host; 530d1bb41aSBen Dooks struct platform_device *pdev; 540d1bb41aSBen Dooks struct resource *ioarea; 550d1bb41aSBen Dooks struct s3c_sdhci_platdata *pdata; 560d1bb41aSBen Dooks unsigned int cur_clk; 5717866e14SMarek Szyprowski int ext_cd_irq; 5817866e14SMarek Szyprowski int ext_cd_gpio; 59cd1b00ebSThomas Abraham int *gpios; 600d1bb41aSBen Dooks 610d1bb41aSBen Dooks struct clk *clk_io; 620d1bb41aSBen Dooks struct clk *clk_bus[MAX_BUS_CLK]; 630d1bb41aSBen Dooks }; 640d1bb41aSBen Dooks 653119936aSThomas Abraham /** 663119936aSThomas Abraham * struct sdhci_s3c_driver_data - S3C SDHCI platform specific driver data 673119936aSThomas Abraham * @sdhci_quirks: sdhci host specific quirks. 683119936aSThomas Abraham * 693119936aSThomas Abraham * Specifies platform specific configuration of sdhci controller. 703119936aSThomas Abraham * Note: A structure for driver specific platform data is used for future 713119936aSThomas Abraham * expansion of its usage. 723119936aSThomas Abraham */ 733119936aSThomas Abraham struct sdhci_s3c_drv_data { 743119936aSThomas Abraham unsigned int sdhci_quirks; 753119936aSThomas Abraham }; 763119936aSThomas Abraham 770d1bb41aSBen Dooks static inline struct sdhci_s3c *to_s3c(struct sdhci_host *host) 780d1bb41aSBen Dooks { 790d1bb41aSBen Dooks return sdhci_priv(host); 800d1bb41aSBen Dooks } 810d1bb41aSBen Dooks 820d1bb41aSBen Dooks /** 830d1bb41aSBen Dooks * get_curclk - convert ctrl2 register to clock source number 840d1bb41aSBen Dooks * @ctrl2: Control2 register value. 850d1bb41aSBen Dooks */ 860d1bb41aSBen Dooks static u32 get_curclk(u32 ctrl2) 870d1bb41aSBen Dooks { 880d1bb41aSBen Dooks ctrl2 &= S3C_SDHCI_CTRL2_SELBASECLK_MASK; 890d1bb41aSBen Dooks ctrl2 >>= S3C_SDHCI_CTRL2_SELBASECLK_SHIFT; 900d1bb41aSBen Dooks 910d1bb41aSBen Dooks return ctrl2; 920d1bb41aSBen Dooks } 930d1bb41aSBen Dooks 940d1bb41aSBen Dooks static void sdhci_s3c_check_sclk(struct sdhci_host *host) 950d1bb41aSBen Dooks { 960d1bb41aSBen Dooks struct sdhci_s3c *ourhost = to_s3c(host); 970d1bb41aSBen Dooks u32 tmp = readl(host->ioaddr + S3C_SDHCI_CONTROL2); 980d1bb41aSBen Dooks 990d1bb41aSBen Dooks if (get_curclk(tmp) != ourhost->cur_clk) { 1000d1bb41aSBen Dooks dev_dbg(&ourhost->pdev->dev, "restored ctrl2 clock setting\n"); 1010d1bb41aSBen Dooks 1020d1bb41aSBen Dooks tmp &= ~S3C_SDHCI_CTRL2_SELBASECLK_MASK; 1030d1bb41aSBen Dooks tmp |= ourhost->cur_clk << S3C_SDHCI_CTRL2_SELBASECLK_SHIFT; 1047003fecbSJingoo Han writel(tmp, host->ioaddr + S3C_SDHCI_CONTROL2); 1050d1bb41aSBen Dooks } 1060d1bb41aSBen Dooks } 1070d1bb41aSBen Dooks 1080d1bb41aSBen Dooks /** 1090d1bb41aSBen Dooks * sdhci_s3c_get_max_clk - callback to get maximum clock frequency. 1100d1bb41aSBen Dooks * @host: The SDHCI host instance. 1110d1bb41aSBen Dooks * 1120d1bb41aSBen Dooks * Callback to return the maximum clock rate acheivable by the controller. 1130d1bb41aSBen Dooks */ 1140d1bb41aSBen Dooks static unsigned int sdhci_s3c_get_max_clk(struct sdhci_host *host) 1150d1bb41aSBen Dooks { 1160d1bb41aSBen Dooks struct sdhci_s3c *ourhost = to_s3c(host); 1170d1bb41aSBen Dooks struct clk *busclk; 1180d1bb41aSBen Dooks unsigned int rate, max; 1190d1bb41aSBen Dooks int clk; 1200d1bb41aSBen Dooks 1210d1bb41aSBen Dooks /* note, a reset will reset the clock source */ 1220d1bb41aSBen Dooks 1230d1bb41aSBen Dooks sdhci_s3c_check_sclk(host); 1240d1bb41aSBen Dooks 1250d1bb41aSBen Dooks for (max = 0, clk = 0; clk < MAX_BUS_CLK; clk++) { 1260d1bb41aSBen Dooks busclk = ourhost->clk_bus[clk]; 1270d1bb41aSBen Dooks if (!busclk) 1280d1bb41aSBen Dooks continue; 1290d1bb41aSBen Dooks 1300d1bb41aSBen Dooks rate = clk_get_rate(busclk); 1310d1bb41aSBen Dooks if (rate > max) 1320d1bb41aSBen Dooks max = rate; 1330d1bb41aSBen Dooks } 1340d1bb41aSBen Dooks 1350d1bb41aSBen Dooks return max; 1360d1bb41aSBen Dooks } 1370d1bb41aSBen Dooks 1380d1bb41aSBen Dooks /** 1390d1bb41aSBen Dooks * sdhci_s3c_consider_clock - consider one the bus clocks for current setting 1400d1bb41aSBen Dooks * @ourhost: Our SDHCI instance. 1410d1bb41aSBen Dooks * @src: The source clock index. 1420d1bb41aSBen Dooks * @wanted: The clock frequency wanted. 1430d1bb41aSBen Dooks */ 1440d1bb41aSBen Dooks static unsigned int sdhci_s3c_consider_clock(struct sdhci_s3c *ourhost, 1450d1bb41aSBen Dooks unsigned int src, 1460d1bb41aSBen Dooks unsigned int wanted) 1470d1bb41aSBen Dooks { 1480d1bb41aSBen Dooks unsigned long rate; 1490d1bb41aSBen Dooks struct clk *clksrc = ourhost->clk_bus[src]; 1500d1bb41aSBen Dooks int div; 1510d1bb41aSBen Dooks 1520d1bb41aSBen Dooks if (!clksrc) 1530d1bb41aSBen Dooks return UINT_MAX; 1540d1bb41aSBen Dooks 155253e0a7cSJeongbae Seo /* 1563119936aSThomas Abraham * If controller uses a non-standard clock division, find the best clock 1573119936aSThomas Abraham * speed possible with selected clock source and skip the division. 158253e0a7cSJeongbae Seo */ 1593119936aSThomas Abraham if (ourhost->host->quirks & SDHCI_QUIRK_NONSTANDARD_CLOCK) { 160253e0a7cSJeongbae Seo rate = clk_round_rate(clksrc, wanted); 161253e0a7cSJeongbae Seo return wanted - rate; 162253e0a7cSJeongbae Seo } 163253e0a7cSJeongbae Seo 1640d1bb41aSBen Dooks rate = clk_get_rate(clksrc); 1650d1bb41aSBen Dooks 1660d1bb41aSBen Dooks for (div = 1; div < 256; div *= 2) { 1670d1bb41aSBen Dooks if ((rate / div) <= wanted) 1680d1bb41aSBen Dooks break; 1690d1bb41aSBen Dooks } 1700d1bb41aSBen Dooks 1710d1bb41aSBen Dooks dev_dbg(&ourhost->pdev->dev, "clk %d: rate %ld, want %d, got %ld\n", 1720d1bb41aSBen Dooks src, rate, wanted, rate / div); 1730d1bb41aSBen Dooks 1742ad0b249SJingoo Han return wanted - (rate / div); 1750d1bb41aSBen Dooks } 1760d1bb41aSBen Dooks 1770d1bb41aSBen Dooks /** 1780d1bb41aSBen Dooks * sdhci_s3c_set_clock - callback on clock change 1790d1bb41aSBen Dooks * @host: The SDHCI host being changed 1800d1bb41aSBen Dooks * @clock: The clock rate being requested. 1810d1bb41aSBen Dooks * 1820d1bb41aSBen Dooks * When the card's clock is going to be changed, look at the new frequency 1830d1bb41aSBen Dooks * and find the best clock source to go with it. 1840d1bb41aSBen Dooks */ 1850d1bb41aSBen Dooks static void sdhci_s3c_set_clock(struct sdhci_host *host, unsigned int clock) 1860d1bb41aSBen Dooks { 1870d1bb41aSBen Dooks struct sdhci_s3c *ourhost = to_s3c(host); 1880d1bb41aSBen Dooks unsigned int best = UINT_MAX; 1890d1bb41aSBen Dooks unsigned int delta; 1900d1bb41aSBen Dooks int best_src = 0; 1910d1bb41aSBen Dooks int src; 1920d1bb41aSBen Dooks u32 ctrl; 1930d1bb41aSBen Dooks 1940d1bb41aSBen Dooks /* don't bother if the clock is going off. */ 1950d1bb41aSBen Dooks if (clock == 0) 1960d1bb41aSBen Dooks return; 1970d1bb41aSBen Dooks 1980d1bb41aSBen Dooks for (src = 0; src < MAX_BUS_CLK; src++) { 1990d1bb41aSBen Dooks delta = sdhci_s3c_consider_clock(ourhost, src, clock); 2000d1bb41aSBen Dooks if (delta < best) { 2010d1bb41aSBen Dooks best = delta; 2020d1bb41aSBen Dooks best_src = src; 2030d1bb41aSBen Dooks } 2040d1bb41aSBen Dooks } 2050d1bb41aSBen Dooks 2060d1bb41aSBen Dooks dev_dbg(&ourhost->pdev->dev, 2070d1bb41aSBen Dooks "selected source %d, clock %d, delta %d\n", 2080d1bb41aSBen Dooks best_src, clock, best); 2090d1bb41aSBen Dooks 2100d1bb41aSBen Dooks /* select the new clock source */ 2110d1bb41aSBen Dooks if (ourhost->cur_clk != best_src) { 2120d1bb41aSBen Dooks struct clk *clk = ourhost->clk_bus[best_src]; 2130d1bb41aSBen Dooks 2140f310a05SThomas Abraham clk_prepare_enable(clk); 2150f310a05SThomas Abraham clk_disable_unprepare(ourhost->clk_bus[ourhost->cur_clk]); 216e684c468SChander Kashyap 2170d1bb41aSBen Dooks /* turn clock off to card before changing clock source */ 2180d1bb41aSBen Dooks writew(0, host->ioaddr + SDHCI_CLOCK_CONTROL); 2190d1bb41aSBen Dooks 2200d1bb41aSBen Dooks ourhost->cur_clk = best_src; 2210d1bb41aSBen Dooks host->max_clk = clk_get_rate(clk); 2220d1bb41aSBen Dooks 2230d1bb41aSBen Dooks ctrl = readl(host->ioaddr + S3C_SDHCI_CONTROL2); 2240d1bb41aSBen Dooks ctrl &= ~S3C_SDHCI_CTRL2_SELBASECLK_MASK; 2250d1bb41aSBen Dooks ctrl |= best_src << S3C_SDHCI_CTRL2_SELBASECLK_SHIFT; 2260d1bb41aSBen Dooks writel(ctrl, host->ioaddr + S3C_SDHCI_CONTROL2); 2270d1bb41aSBen Dooks } 2280d1bb41aSBen Dooks 2296fe47179SThomas Abraham /* reprogram default hardware configuration */ 2306fe47179SThomas Abraham writel(S3C64XX_SDHCI_CONTROL4_DRIVE_9mA, 2316fe47179SThomas Abraham host->ioaddr + S3C64XX_SDHCI_CONTROL4); 2320d1bb41aSBen Dooks 2336fe47179SThomas Abraham ctrl = readl(host->ioaddr + S3C_SDHCI_CONTROL2); 2346fe47179SThomas Abraham ctrl |= (S3C64XX_SDHCI_CTRL2_ENSTAASYNCCLR | 2356fe47179SThomas Abraham S3C64XX_SDHCI_CTRL2_ENCMDCNFMSK | 2366fe47179SThomas Abraham S3C_SDHCI_CTRL2_ENFBCLKRX | 2376fe47179SThomas Abraham S3C_SDHCI_CTRL2_DFCNT_NONE | 2386fe47179SThomas Abraham S3C_SDHCI_CTRL2_ENCLKOUTHOLD); 2396fe47179SThomas Abraham writel(ctrl, host->ioaddr + S3C_SDHCI_CONTROL2); 2400d1bb41aSBen Dooks 2416fe47179SThomas Abraham /* reconfigure the controller for new clock rate */ 2426fe47179SThomas Abraham ctrl = (S3C_SDHCI_CTRL3_FCSEL1 | S3C_SDHCI_CTRL3_FCSEL0); 2436fe47179SThomas Abraham if (clock < 25 * 1000000) 2446fe47179SThomas Abraham ctrl |= (S3C_SDHCI_CTRL3_FCSEL3 | S3C_SDHCI_CTRL3_FCSEL2); 2456fe47179SThomas Abraham writel(ctrl, host->ioaddr + S3C_SDHCI_CONTROL3); 2460d1bb41aSBen Dooks } 2470d1bb41aSBen Dooks 248ce5f036bSMarek Szyprowski /** 249ce5f036bSMarek Szyprowski * sdhci_s3c_get_min_clock - callback to get minimal supported clock value 250ce5f036bSMarek Szyprowski * @host: The SDHCI host being queried 251ce5f036bSMarek Szyprowski * 252ce5f036bSMarek Szyprowski * To init mmc host properly a minimal clock value is needed. For high system 253ce5f036bSMarek Szyprowski * bus clock's values the standard formula gives values out of allowed range. 254ce5f036bSMarek Szyprowski * The clock still can be set to lower values, if clock source other then 255ce5f036bSMarek Szyprowski * system bus is selected. 256ce5f036bSMarek Szyprowski */ 257ce5f036bSMarek Szyprowski static unsigned int sdhci_s3c_get_min_clock(struct sdhci_host *host) 258ce5f036bSMarek Szyprowski { 259ce5f036bSMarek Szyprowski struct sdhci_s3c *ourhost = to_s3c(host); 260ce5f036bSMarek Szyprowski unsigned int delta, min = UINT_MAX; 261ce5f036bSMarek Szyprowski int src; 262ce5f036bSMarek Szyprowski 263ce5f036bSMarek Szyprowski for (src = 0; src < MAX_BUS_CLK; src++) { 264ce5f036bSMarek Szyprowski delta = sdhci_s3c_consider_clock(ourhost, src, 0); 265ce5f036bSMarek Szyprowski if (delta == UINT_MAX) 266ce5f036bSMarek Szyprowski continue; 267ce5f036bSMarek Szyprowski /* delta is a negative value in this case */ 268ce5f036bSMarek Szyprowski if (-delta < min) 269ce5f036bSMarek Szyprowski min = -delta; 270ce5f036bSMarek Szyprowski } 271ce5f036bSMarek Szyprowski return min; 272ce5f036bSMarek Szyprowski } 273ce5f036bSMarek Szyprowski 274253e0a7cSJeongbae Seo /* sdhci_cmu_get_max_clk - callback to get maximum clock frequency.*/ 275253e0a7cSJeongbae Seo static unsigned int sdhci_cmu_get_max_clock(struct sdhci_host *host) 276253e0a7cSJeongbae Seo { 277253e0a7cSJeongbae Seo struct sdhci_s3c *ourhost = to_s3c(host); 278253e0a7cSJeongbae Seo 279253e0a7cSJeongbae Seo return clk_round_rate(ourhost->clk_bus[ourhost->cur_clk], UINT_MAX); 280253e0a7cSJeongbae Seo } 281253e0a7cSJeongbae Seo 282253e0a7cSJeongbae Seo /* sdhci_cmu_get_min_clock - callback to get minimal supported clock value. */ 283253e0a7cSJeongbae Seo static unsigned int sdhci_cmu_get_min_clock(struct sdhci_host *host) 284253e0a7cSJeongbae Seo { 285253e0a7cSJeongbae Seo struct sdhci_s3c *ourhost = to_s3c(host); 286253e0a7cSJeongbae Seo 287253e0a7cSJeongbae Seo /* 288253e0a7cSJeongbae Seo * initial clock can be in the frequency range of 289253e0a7cSJeongbae Seo * 100KHz-400KHz, so we set it as max value. 290253e0a7cSJeongbae Seo */ 291253e0a7cSJeongbae Seo return clk_round_rate(ourhost->clk_bus[ourhost->cur_clk], 400000); 292253e0a7cSJeongbae Seo } 293253e0a7cSJeongbae Seo 294253e0a7cSJeongbae Seo /* sdhci_cmu_set_clock - callback on clock change.*/ 295253e0a7cSJeongbae Seo static void sdhci_cmu_set_clock(struct sdhci_host *host, unsigned int clock) 296253e0a7cSJeongbae Seo { 297253e0a7cSJeongbae Seo struct sdhci_s3c *ourhost = to_s3c(host); 2982ad0b249SJingoo Han struct device *dev = &ourhost->pdev->dev; 2993119936aSThomas Abraham unsigned long timeout; 3003119936aSThomas Abraham u16 clk = 0; 301253e0a7cSJeongbae Seo 302253e0a7cSJeongbae Seo /* don't bother if the clock is going off */ 303253e0a7cSJeongbae Seo if (clock == 0) 304253e0a7cSJeongbae Seo return; 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 /** 333548f07d2SJaehoon Chung * sdhci_s3c_platform_8bit_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. 338548f07d2SJaehoon Chung * So we add platform_8bit_width() and support 8bit width. 339548f07d2SJaehoon Chung */ 340548f07d2SJaehoon Chung static int sdhci_s3c_platform_8bit_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, 370548f07d2SJaehoon Chung .platform_8bit_width = sdhci_s3c_platform_8bit_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); 37606fe577fSMarek Szyprowski unsigned long flags; 37706fe577fSMarek Szyprowski 37817866e14SMarek Szyprowski if (host) { 37906fe577fSMarek Szyprowski spin_lock_irqsave(&host->lock, flags); 38017866e14SMarek Szyprowski if (state) { 38117866e14SMarek Szyprowski dev_dbg(&dev->dev, "card inserted.\n"); 38217866e14SMarek Szyprowski host->flags &= ~SDHCI_DEVICE_DEAD; 38317866e14SMarek Szyprowski host->quirks |= SDHCI_QUIRK_BROKEN_CARD_DETECTION; 38417866e14SMarek Szyprowski } else { 38517866e14SMarek Szyprowski dev_dbg(&dev->dev, "card removed.\n"); 38617866e14SMarek Szyprowski host->flags |= SDHCI_DEVICE_DEAD; 38717866e14SMarek Szyprowski host->quirks &= ~SDHCI_QUIRK_BROKEN_CARD_DETECTION; 38817866e14SMarek Szyprowski } 389f522886eSKyungmin Park tasklet_schedule(&host->card_tasklet); 39006fe577fSMarek Szyprowski spin_unlock_irqrestore(&host->lock, flags); 39117866e14SMarek Szyprowski } 39217866e14SMarek Szyprowski } 39317866e14SMarek Szyprowski 39417866e14SMarek Szyprowski static irqreturn_t sdhci_s3c_gpio_card_detect_thread(int irq, void *dev_id) 39517866e14SMarek Szyprowski { 39617866e14SMarek Szyprowski struct sdhci_s3c *sc = dev_id; 39717866e14SMarek Szyprowski int status = gpio_get_value(sc->ext_cd_gpio); 39817866e14SMarek Szyprowski if (sc->pdata->ext_cd_gpio_invert) 39917866e14SMarek Szyprowski status = !status; 40017866e14SMarek Szyprowski sdhci_s3c_notify_change(sc->pdev, status); 40117866e14SMarek Szyprowski return IRQ_HANDLED; 40217866e14SMarek Szyprowski } 40317866e14SMarek Szyprowski 40417866e14SMarek Szyprowski static void sdhci_s3c_setup_card_detect_gpio(struct sdhci_s3c *sc) 40517866e14SMarek Szyprowski { 40617866e14SMarek Szyprowski struct s3c_sdhci_platdata *pdata = sc->pdata; 40717866e14SMarek Szyprowski struct device *dev = &sc->pdev->dev; 40817866e14SMarek Szyprowski 40917866e14SMarek Szyprowski if (gpio_request(pdata->ext_cd_gpio, "SDHCI EXT CD") == 0) { 41017866e14SMarek Szyprowski sc->ext_cd_gpio = pdata->ext_cd_gpio; 41117866e14SMarek Szyprowski sc->ext_cd_irq = gpio_to_irq(pdata->ext_cd_gpio); 41217866e14SMarek Szyprowski if (sc->ext_cd_irq && 41317866e14SMarek Szyprowski request_threaded_irq(sc->ext_cd_irq, NULL, 41417866e14SMarek Szyprowski sdhci_s3c_gpio_card_detect_thread, 4152ad0b249SJingoo Han IRQF_TRIGGER_RISING | 4162ad0b249SJingoo Han IRQF_TRIGGER_FALLING | 4172ad0b249SJingoo Han IRQF_ONESHOT, 41817866e14SMarek Szyprowski dev_name(dev), sc) == 0) { 41917866e14SMarek Szyprowski int status = gpio_get_value(sc->ext_cd_gpio); 42017866e14SMarek Szyprowski if (pdata->ext_cd_gpio_invert) 42117866e14SMarek Szyprowski status = !status; 42217866e14SMarek Szyprowski sdhci_s3c_notify_change(sc->pdev, status); 42317866e14SMarek Szyprowski } else { 42417866e14SMarek Szyprowski dev_warn(dev, "cannot request irq for card detect\n"); 42517866e14SMarek Szyprowski sc->ext_cd_irq = 0; 42617866e14SMarek Szyprowski } 42717866e14SMarek Szyprowski } else { 42817866e14SMarek Szyprowski dev_err(dev, "cannot request gpio for card detect\n"); 42917866e14SMarek Szyprowski } 43017866e14SMarek Szyprowski } 43117866e14SMarek Szyprowski 432cd1b00ebSThomas Abraham #ifdef CONFIG_OF 433cd1b00ebSThomas Abraham static int __devinit sdhci_s3c_parse_dt(struct device *dev, 434cd1b00ebSThomas Abraham struct sdhci_host *host, struct s3c_sdhci_platdata *pdata) 435cd1b00ebSThomas Abraham { 436cd1b00ebSThomas Abraham struct device_node *node = dev->of_node; 437cd1b00ebSThomas Abraham struct sdhci_s3c *ourhost = to_s3c(host); 438cd1b00ebSThomas Abraham u32 max_width; 439cd1b00ebSThomas Abraham int gpio, cnt, ret; 440cd1b00ebSThomas Abraham 441cd1b00ebSThomas Abraham /* if the bus-width property is not specified, assume width as 1 */ 442cd1b00ebSThomas Abraham if (of_property_read_u32(node, "bus-width", &max_width)) 443cd1b00ebSThomas Abraham max_width = 1; 444cd1b00ebSThomas Abraham pdata->max_width = max_width; 445cd1b00ebSThomas Abraham 446cd1b00ebSThomas Abraham ourhost->gpios = devm_kzalloc(dev, NUM_GPIOS(pdata->max_width) * 447cd1b00ebSThomas Abraham sizeof(int), GFP_KERNEL); 448cd1b00ebSThomas Abraham if (!ourhost->gpios) 449cd1b00ebSThomas Abraham return -ENOMEM; 450cd1b00ebSThomas Abraham 451cd1b00ebSThomas Abraham /* get the card detection method */ 452cd1b00ebSThomas Abraham if (of_get_property(node, "broken-cd", 0)) { 453cd1b00ebSThomas Abraham pdata->cd_type = S3C_SDHCI_CD_NONE; 454cd1b00ebSThomas Abraham goto setup_bus; 455cd1b00ebSThomas Abraham } 456cd1b00ebSThomas Abraham 457cd1b00ebSThomas Abraham if (of_get_property(node, "non-removable", 0)) { 458cd1b00ebSThomas Abraham pdata->cd_type = S3C_SDHCI_CD_PERMANENT; 459cd1b00ebSThomas Abraham goto setup_bus; 460cd1b00ebSThomas Abraham } 461cd1b00ebSThomas Abraham 462cd1b00ebSThomas Abraham gpio = of_get_named_gpio(node, "cd-gpios", 0); 463cd1b00ebSThomas Abraham if (gpio_is_valid(gpio)) { 464cd1b00ebSThomas Abraham pdata->cd_type = S3C_SDHCI_CD_GPIO; 465cd1b00ebSThomas Abraham goto found_cd; 466cd1b00ebSThomas Abraham } else if (gpio != -ENOENT) { 467cd1b00ebSThomas Abraham dev_err(dev, "invalid card detect gpio specified\n"); 468cd1b00ebSThomas Abraham return -EINVAL; 469cd1b00ebSThomas Abraham } 470cd1b00ebSThomas Abraham 471cd1b00ebSThomas Abraham gpio = of_get_named_gpio(node, "samsung,cd-pinmux-gpio", 0); 472cd1b00ebSThomas Abraham if (gpio_is_valid(gpio)) { 473cd1b00ebSThomas Abraham pdata->cd_type = S3C_SDHCI_CD_INTERNAL; 474cd1b00ebSThomas Abraham goto found_cd; 475cd1b00ebSThomas Abraham } else if (gpio != -ENOENT) { 476cd1b00ebSThomas Abraham dev_err(dev, "invalid card detect gpio specified\n"); 477cd1b00ebSThomas Abraham return -EINVAL; 478cd1b00ebSThomas Abraham } 479cd1b00ebSThomas Abraham 480cd1b00ebSThomas Abraham dev_info(dev, "assuming no card detect line available\n"); 481cd1b00ebSThomas Abraham pdata->cd_type = S3C_SDHCI_CD_NONE; 482cd1b00ebSThomas Abraham 483cd1b00ebSThomas Abraham found_cd: 484cd1b00ebSThomas Abraham if (pdata->cd_type == S3C_SDHCI_CD_GPIO) { 485cd1b00ebSThomas Abraham pdata->ext_cd_gpio = gpio; 486cd1b00ebSThomas Abraham ourhost->ext_cd_gpio = -1; 487cd1b00ebSThomas Abraham if (of_get_property(node, "cd-inverted", NULL)) 488cd1b00ebSThomas Abraham pdata->ext_cd_gpio_invert = 1; 489cd1b00ebSThomas Abraham } else if (pdata->cd_type == S3C_SDHCI_CD_INTERNAL) { 490cd1b00ebSThomas Abraham ret = gpio_request(gpio, "sdhci-cd"); 491cd1b00ebSThomas Abraham if (ret) { 492cd1b00ebSThomas Abraham dev_err(dev, "card detect gpio request failed\n"); 493cd1b00ebSThomas Abraham return -EINVAL; 494cd1b00ebSThomas Abraham } 495cd1b00ebSThomas Abraham ourhost->ext_cd_gpio = gpio; 496cd1b00ebSThomas Abraham } 497cd1b00ebSThomas Abraham 498cd1b00ebSThomas Abraham setup_bus: 499cd1b00ebSThomas Abraham /* get the gpios for command, clock and data lines */ 500cd1b00ebSThomas Abraham for (cnt = 0; cnt < NUM_GPIOS(pdata->max_width); cnt++) { 501cd1b00ebSThomas Abraham gpio = of_get_gpio(node, cnt); 502cd1b00ebSThomas Abraham if (!gpio_is_valid(gpio)) { 503cd1b00ebSThomas Abraham dev_err(dev, "invalid gpio[%d]\n", cnt); 504cd1b00ebSThomas Abraham goto err_free_dt_cd_gpio; 505cd1b00ebSThomas Abraham } 506cd1b00ebSThomas Abraham ourhost->gpios[cnt] = gpio; 507cd1b00ebSThomas Abraham } 508cd1b00ebSThomas Abraham 509cd1b00ebSThomas Abraham for (cnt = 0; cnt < NUM_GPIOS(pdata->max_width); cnt++) { 510cd1b00ebSThomas Abraham ret = gpio_request(ourhost->gpios[cnt], "sdhci-gpio"); 511cd1b00ebSThomas Abraham if (ret) { 512cd1b00ebSThomas Abraham dev_err(dev, "gpio[%d] request failed\n", cnt); 513cd1b00ebSThomas Abraham goto err_free_dt_gpios; 514cd1b00ebSThomas Abraham } 515cd1b00ebSThomas Abraham } 516cd1b00ebSThomas Abraham 517cd1b00ebSThomas Abraham return 0; 518cd1b00ebSThomas Abraham 519cd1b00ebSThomas Abraham err_free_dt_gpios: 520cd1b00ebSThomas Abraham while (--cnt >= 0) 521cd1b00ebSThomas Abraham gpio_free(ourhost->gpios[cnt]); 522cd1b00ebSThomas Abraham err_free_dt_cd_gpio: 523cd1b00ebSThomas Abraham if (pdata->cd_type == S3C_SDHCI_CD_INTERNAL) 524cd1b00ebSThomas Abraham gpio_free(ourhost->ext_cd_gpio); 525cd1b00ebSThomas Abraham return -EINVAL; 526cd1b00ebSThomas Abraham } 527cd1b00ebSThomas Abraham #else 528cd1b00ebSThomas Abraham static int __devinit sdhci_s3c_parse_dt(struct device *dev, 529cd1b00ebSThomas Abraham struct sdhci_host *host, struct s3c_sdhci_platdata *pdata) 530cd1b00ebSThomas Abraham { 531cd1b00ebSThomas Abraham return -EINVAL; 532cd1b00ebSThomas Abraham } 533cd1b00ebSThomas Abraham #endif 534cd1b00ebSThomas Abraham 535cd1b00ebSThomas Abraham static const struct of_device_id sdhci_s3c_dt_match[]; 536cd1b00ebSThomas Abraham 5373119936aSThomas Abraham static inline struct sdhci_s3c_drv_data *sdhci_s3c_get_driver_data( 5383119936aSThomas Abraham struct platform_device *pdev) 5393119936aSThomas Abraham { 540cd1b00ebSThomas Abraham #ifdef CONFIG_OF 541cd1b00ebSThomas Abraham if (pdev->dev.of_node) { 542cd1b00ebSThomas Abraham const struct of_device_id *match; 543cd1b00ebSThomas Abraham match = of_match_node(sdhci_s3c_dt_match, pdev->dev.of_node); 544cd1b00ebSThomas Abraham return (struct sdhci_s3c_drv_data *)match->data; 545cd1b00ebSThomas Abraham } 546cd1b00ebSThomas Abraham #endif 5473119936aSThomas Abraham return (struct sdhci_s3c_drv_data *) 5483119936aSThomas Abraham platform_get_device_id(pdev)->driver_data; 5493119936aSThomas Abraham } 5503119936aSThomas Abraham 5510d1bb41aSBen Dooks static int __devinit sdhci_s3c_probe(struct platform_device *pdev) 5520d1bb41aSBen Dooks { 5531d4dc338SThomas Abraham struct s3c_sdhci_platdata *pdata; 5543119936aSThomas Abraham struct sdhci_s3c_drv_data *drv_data; 5550d1bb41aSBen Dooks struct device *dev = &pdev->dev; 5560d1bb41aSBen Dooks struct sdhci_host *host; 5570d1bb41aSBen Dooks struct sdhci_s3c *sc; 5580d1bb41aSBen Dooks struct resource *res; 5590d1bb41aSBen Dooks int ret, irq, ptr, clks; 5600d1bb41aSBen Dooks 561cd1b00ebSThomas Abraham if (!pdev->dev.platform_data && !pdev->dev.of_node) { 5620d1bb41aSBen Dooks dev_err(dev, "no device data specified\n"); 5630d1bb41aSBen Dooks return -ENOENT; 5640d1bb41aSBen Dooks } 5650d1bb41aSBen Dooks 5660d1bb41aSBen Dooks irq = platform_get_irq(pdev, 0); 5670d1bb41aSBen Dooks if (irq < 0) { 5680d1bb41aSBen Dooks dev_err(dev, "no irq specified\n"); 5690d1bb41aSBen Dooks return irq; 5700d1bb41aSBen Dooks } 5710d1bb41aSBen Dooks 5720d1bb41aSBen Dooks host = sdhci_alloc_host(dev, sizeof(struct sdhci_s3c)); 5730d1bb41aSBen Dooks if (IS_ERR(host)) { 5740d1bb41aSBen Dooks dev_err(dev, "sdhci_alloc_host() failed\n"); 5750d1bb41aSBen Dooks return PTR_ERR(host); 5760d1bb41aSBen Dooks } 577cd1b00ebSThomas Abraham sc = sdhci_priv(host); 5780d1bb41aSBen Dooks 5791d4dc338SThomas Abraham pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); 5801d4dc338SThomas Abraham if (!pdata) { 5811d4dc338SThomas Abraham ret = -ENOMEM; 582cd1b00ebSThomas Abraham goto err_pdata; 5831d4dc338SThomas Abraham } 584cd1b00ebSThomas Abraham 585cd1b00ebSThomas Abraham if (pdev->dev.of_node) { 586cd1b00ebSThomas Abraham ret = sdhci_s3c_parse_dt(&pdev->dev, host, pdata); 587cd1b00ebSThomas Abraham if (ret) 588cd1b00ebSThomas Abraham goto err_pdata; 589cd1b00ebSThomas Abraham } else { 5901d4dc338SThomas Abraham memcpy(pdata, pdev->dev.platform_data, sizeof(*pdata)); 591cd1b00ebSThomas Abraham sc->ext_cd_gpio = -1; /* invalid gpio number */ 592cd1b00ebSThomas Abraham } 5931d4dc338SThomas Abraham 5943119936aSThomas Abraham drv_data = sdhci_s3c_get_driver_data(pdev); 5950d1bb41aSBen Dooks 5960d1bb41aSBen Dooks sc->host = host; 5970d1bb41aSBen Dooks sc->pdev = pdev; 5980d1bb41aSBen Dooks sc->pdata = pdata; 5990d1bb41aSBen Dooks 6000d1bb41aSBen Dooks platform_set_drvdata(pdev, host); 6010d1bb41aSBen Dooks 6020d1bb41aSBen Dooks sc->clk_io = clk_get(dev, "hsmmc"); 6030d1bb41aSBen Dooks if (IS_ERR(sc->clk_io)) { 6040d1bb41aSBen Dooks dev_err(dev, "failed to get io clock\n"); 6050d1bb41aSBen Dooks ret = PTR_ERR(sc->clk_io); 6060d1bb41aSBen Dooks goto err_io_clk; 6070d1bb41aSBen Dooks } 6080d1bb41aSBen Dooks 6090d1bb41aSBen Dooks /* enable the local io clock and keep it running for the moment. */ 6100f310a05SThomas Abraham clk_prepare_enable(sc->clk_io); 6110d1bb41aSBen Dooks 6120d1bb41aSBen Dooks for (clks = 0, ptr = 0; ptr < MAX_BUS_CLK; ptr++) { 6130d1bb41aSBen Dooks struct clk *clk; 6144346b6d9SRajeshwari Shinde char name[14]; 6150d1bb41aSBen Dooks 6164346b6d9SRajeshwari Shinde snprintf(name, 14, "mmc_busclk.%d", ptr); 6170d1bb41aSBen Dooks clk = clk_get(dev, name); 6182ad0b249SJingoo Han if (IS_ERR(clk)) 6190d1bb41aSBen Dooks continue; 6200d1bb41aSBen Dooks 6210d1bb41aSBen Dooks clks++; 6220d1bb41aSBen Dooks sc->clk_bus[ptr] = clk; 623253e0a7cSJeongbae Seo 624253e0a7cSJeongbae Seo /* 625253e0a7cSJeongbae Seo * save current clock index to know which clock bus 626253e0a7cSJeongbae Seo * is used later in overriding functions. 627253e0a7cSJeongbae Seo */ 628253e0a7cSJeongbae Seo sc->cur_clk = ptr; 629253e0a7cSJeongbae Seo 6300d1bb41aSBen Dooks dev_info(dev, "clock source %d: %s (%ld Hz)\n", 6310d1bb41aSBen Dooks ptr, name, clk_get_rate(clk)); 6320d1bb41aSBen Dooks } 6330d1bb41aSBen Dooks 6340d1bb41aSBen Dooks if (clks == 0) { 6350d1bb41aSBen Dooks dev_err(dev, "failed to find any bus clocks\n"); 6360d1bb41aSBen Dooks ret = -ENOENT; 6370d1bb41aSBen Dooks goto err_no_busclks; 6380d1bb41aSBen Dooks } 6390d1bb41aSBen Dooks 6402abeb5c5SChander Kashyap #ifndef CONFIG_PM_RUNTIME 6410f310a05SThomas Abraham clk_prepare_enable(sc->clk_bus[sc->cur_clk]); 6422abeb5c5SChander Kashyap #endif 643e684c468SChander Kashyap 6449bda6da7SJulia Lawall res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 6459bda6da7SJulia Lawall host->ioaddr = devm_request_and_ioremap(&pdev->dev, res); 6460d1bb41aSBen Dooks if (!host->ioaddr) { 6470d1bb41aSBen Dooks dev_err(dev, "failed to map registers\n"); 6480d1bb41aSBen Dooks ret = -ENXIO; 6490d1bb41aSBen Dooks goto err_req_regs; 6500d1bb41aSBen Dooks } 6510d1bb41aSBen Dooks 6520d1bb41aSBen Dooks /* Ensure we have minimal gpio selected CMD/CLK/Detect */ 6530d1bb41aSBen Dooks if (pdata->cfg_gpio) 6540d1bb41aSBen Dooks pdata->cfg_gpio(pdev, pdata->max_width); 6550d1bb41aSBen Dooks 6560d1bb41aSBen Dooks host->hw_name = "samsung-hsmmc"; 6570d1bb41aSBen Dooks host->ops = &sdhci_s3c_ops; 6580d1bb41aSBen Dooks host->quirks = 0; 6590d1bb41aSBen Dooks host->irq = irq; 6600d1bb41aSBen Dooks 6610d1bb41aSBen Dooks /* Setup quirks for the controller */ 662b2e75effSThomas Abraham host->quirks |= SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC; 663a1d56460SMarek Szyprowski host->quirks |= SDHCI_QUIRK_NO_HISPD_BIT; 6643119936aSThomas Abraham if (drv_data) 6653119936aSThomas Abraham host->quirks |= drv_data->sdhci_quirks; 6660d1bb41aSBen Dooks 6670d1bb41aSBen Dooks #ifndef CONFIG_MMC_SDHCI_S3C_DMA 6680d1bb41aSBen Dooks 6690d1bb41aSBen Dooks /* we currently see overruns on errors, so disable the SDMA 6700d1bb41aSBen Dooks * support as well. */ 6710d1bb41aSBen Dooks host->quirks |= SDHCI_QUIRK_BROKEN_DMA; 6720d1bb41aSBen Dooks 6730d1bb41aSBen Dooks #endif /* CONFIG_MMC_SDHCI_S3C_DMA */ 6740d1bb41aSBen Dooks 6750d1bb41aSBen Dooks /* It seems we do not get an DATA transfer complete on non-busy 6760d1bb41aSBen Dooks * transfers, not sure if this is a problem with this specific 6770d1bb41aSBen Dooks * SDHCI block, or a missing configuration that needs to be set. */ 6780d1bb41aSBen Dooks host->quirks |= SDHCI_QUIRK_NO_BUSY_IRQ; 6790d1bb41aSBen Dooks 680732f0e31SKyungmin Park /* This host supports the Auto CMD12 */ 681732f0e31SKyungmin Park host->quirks |= SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12; 682732f0e31SKyungmin Park 6837199e2b6SJaehoon Chung /* Samsung SoCs need BROKEN_ADMA_ZEROLEN_DESC */ 6847199e2b6SJaehoon Chung host->quirks |= SDHCI_QUIRK_BROKEN_ADMA_ZEROLEN_DESC; 6857199e2b6SJaehoon Chung 68617866e14SMarek Szyprowski if (pdata->cd_type == S3C_SDHCI_CD_NONE || 68717866e14SMarek Szyprowski pdata->cd_type == S3C_SDHCI_CD_PERMANENT) 68817866e14SMarek Szyprowski host->quirks |= SDHCI_QUIRK_BROKEN_CARD_DETECTION; 68917866e14SMarek Szyprowski 69017866e14SMarek Szyprowski if (pdata->cd_type == S3C_SDHCI_CD_PERMANENT) 69117866e14SMarek Szyprowski host->mmc->caps = MMC_CAP_NONREMOVABLE; 69217866e14SMarek Szyprowski 6930d22c770SThomas Abraham switch (pdata->max_width) { 6940d22c770SThomas Abraham case 8: 6950d22c770SThomas Abraham host->mmc->caps |= MMC_CAP_8_BIT_DATA; 6960d22c770SThomas Abraham case 4: 6970d22c770SThomas Abraham host->mmc->caps |= MMC_CAP_4_BIT_DATA; 6980d22c770SThomas Abraham break; 6990d22c770SThomas Abraham } 7000d22c770SThomas Abraham 701fa1773ccSSangwook Lee if (pdata->pm_caps) 702fa1773ccSSangwook Lee host->mmc->pm_caps |= pdata->pm_caps; 703fa1773ccSSangwook Lee 7040d1bb41aSBen Dooks host->quirks |= (SDHCI_QUIRK_32BIT_DMA_ADDR | 7050d1bb41aSBen Dooks SDHCI_QUIRK_32BIT_DMA_SIZE); 7060d1bb41aSBen Dooks 7073fe42e07SHyuk Lee /* HSMMC on Samsung SoCs uses SDCLK as timeout clock */ 7083fe42e07SHyuk Lee host->quirks |= SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK; 7093fe42e07SHyuk Lee 710253e0a7cSJeongbae Seo /* 711253e0a7cSJeongbae Seo * If controller does not have internal clock divider, 712253e0a7cSJeongbae Seo * we can use overriding functions instead of default. 713253e0a7cSJeongbae Seo */ 7143119936aSThomas Abraham if (host->quirks & SDHCI_QUIRK_NONSTANDARD_CLOCK) { 715253e0a7cSJeongbae Seo sdhci_s3c_ops.set_clock = sdhci_cmu_set_clock; 716253e0a7cSJeongbae Seo sdhci_s3c_ops.get_min_clock = sdhci_cmu_get_min_clock; 717253e0a7cSJeongbae Seo sdhci_s3c_ops.get_max_clock = sdhci_cmu_get_max_clock; 718253e0a7cSJeongbae Seo } 719253e0a7cSJeongbae Seo 720b3824f2cSJeongbae Seo /* It supports additional host capabilities if needed */ 721b3824f2cSJeongbae Seo if (pdata->host_caps) 722b3824f2cSJeongbae Seo host->mmc->caps |= pdata->host_caps; 723b3824f2cSJeongbae Seo 724c1c4b66dSJaehoon Chung if (pdata->host_caps2) 725c1c4b66dSJaehoon Chung host->mmc->caps2 |= pdata->host_caps2; 726c1c4b66dSJaehoon Chung 7279f4e8151SMark Brown pm_runtime_enable(&pdev->dev); 7289f4e8151SMark Brown pm_runtime_set_autosuspend_delay(&pdev->dev, 50); 7299f4e8151SMark Brown pm_runtime_use_autosuspend(&pdev->dev); 7309f4e8151SMark Brown pm_suspend_ignore_children(&pdev->dev, 1); 7319f4e8151SMark Brown 7320d1bb41aSBen Dooks ret = sdhci_add_host(host); 7330d1bb41aSBen Dooks if (ret) { 7340d1bb41aSBen Dooks dev_err(dev, "sdhci_add_host() failed\n"); 7359f4e8151SMark Brown pm_runtime_forbid(&pdev->dev); 7369f4e8151SMark Brown pm_runtime_get_noresume(&pdev->dev); 7379bda6da7SJulia Lawall goto err_req_regs; 7380d1bb41aSBen Dooks } 7390d1bb41aSBen Dooks 74017866e14SMarek Szyprowski /* The following two methods of card detection might call 74117866e14SMarek Szyprowski sdhci_s3c_notify_change() immediately, so they can be called 74217866e14SMarek Szyprowski only after sdhci_add_host(). Setup errors are ignored. */ 74317866e14SMarek Szyprowski if (pdata->cd_type == S3C_SDHCI_CD_EXTERNAL && pdata->ext_cd_init) 74417866e14SMarek Szyprowski pdata->ext_cd_init(&sdhci_s3c_notify_change); 74517866e14SMarek Szyprowski if (pdata->cd_type == S3C_SDHCI_CD_GPIO && 74617866e14SMarek Szyprowski gpio_is_valid(pdata->ext_cd_gpio)) 74717866e14SMarek Szyprowski sdhci_s3c_setup_card_detect_gpio(sc); 74817866e14SMarek Szyprowski 7492abeb5c5SChander Kashyap #ifdef CONFIG_PM_RUNTIME 7500f310a05SThomas Abraham clk_disable_unprepare(sc->clk_io); 7512abeb5c5SChander Kashyap #endif 7520d1bb41aSBen Dooks return 0; 7530d1bb41aSBen Dooks 7540d1bb41aSBen Dooks err_req_regs: 7552abeb5c5SChander Kashyap #ifndef CONFIG_PM_RUNTIME 7560f310a05SThomas Abraham clk_disable_unprepare(sc->clk_bus[sc->cur_clk]); 7572abeb5c5SChander Kashyap #endif 7580d1bb41aSBen Dooks for (ptr = 0; ptr < MAX_BUS_CLK; ptr++) { 759326adda5SJaehoon Chung if (sc->clk_bus[ptr]) { 7600d1bb41aSBen Dooks clk_put(sc->clk_bus[ptr]); 7610d1bb41aSBen Dooks } 762326adda5SJaehoon Chung } 7630d1bb41aSBen Dooks 7640d1bb41aSBen Dooks err_no_busclks: 7650f310a05SThomas Abraham clk_disable_unprepare(sc->clk_io); 7660d1bb41aSBen Dooks clk_put(sc->clk_io); 7670d1bb41aSBen Dooks 7680d1bb41aSBen Dooks err_io_clk: 769cd1b00ebSThomas Abraham for (ptr = 0; ptr < NUM_GPIOS(sc->pdata->max_width); ptr++) 770cd1b00ebSThomas Abraham gpio_free(sc->gpios[ptr]); 771cd1b00ebSThomas Abraham if (pdata->cd_type == S3C_SDHCI_CD_INTERNAL) 772cd1b00ebSThomas Abraham gpio_free(sc->ext_cd_gpio); 773cd1b00ebSThomas Abraham 774cd1b00ebSThomas Abraham err_pdata: 7750d1bb41aSBen Dooks sdhci_free_host(host); 7760d1bb41aSBen Dooks 7770d1bb41aSBen Dooks return ret; 7780d1bb41aSBen Dooks } 7790d1bb41aSBen Dooks 7800d1bb41aSBen Dooks static int __devexit sdhci_s3c_remove(struct platform_device *pdev) 7810d1bb41aSBen Dooks { 7829d51a6b2SMarek Szyprowski struct sdhci_host *host = platform_get_drvdata(pdev); 7839d51a6b2SMarek Szyprowski struct sdhci_s3c *sc = sdhci_priv(host); 784cd1b00ebSThomas Abraham struct s3c_sdhci_platdata *pdata = sc->pdata; 7859d51a6b2SMarek Szyprowski int ptr; 7869d51a6b2SMarek Szyprowski 78717866e14SMarek Szyprowski if (pdata->cd_type == S3C_SDHCI_CD_EXTERNAL && pdata->ext_cd_cleanup) 78817866e14SMarek Szyprowski pdata->ext_cd_cleanup(&sdhci_s3c_notify_change); 78917866e14SMarek Szyprowski 79017866e14SMarek Szyprowski if (sc->ext_cd_irq) 79117866e14SMarek Szyprowski free_irq(sc->ext_cd_irq, sc); 79217866e14SMarek Szyprowski 79317866e14SMarek Szyprowski if (gpio_is_valid(sc->ext_cd_gpio)) 79417866e14SMarek Szyprowski gpio_free(sc->ext_cd_gpio); 79517866e14SMarek Szyprowski 7962abeb5c5SChander Kashyap #ifdef CONFIG_PM_RUNTIME 7970f310a05SThomas Abraham clk_prepare_enable(sc->clk_io); 7982abeb5c5SChander Kashyap #endif 7999d51a6b2SMarek Szyprowski sdhci_remove_host(host, 1); 8009d51a6b2SMarek Szyprowski 801387a8cbdSChander Kashyap pm_runtime_dont_use_autosuspend(&pdev->dev); 8029f4e8151SMark Brown pm_runtime_disable(&pdev->dev); 8039f4e8151SMark Brown 8042abeb5c5SChander Kashyap #ifndef CONFIG_PM_RUNTIME 8050f310a05SThomas Abraham clk_disable_unprepare(sc->clk_bus[sc->cur_clk]); 8062abeb5c5SChander Kashyap #endif 8075feb54a1SJaehoon Chung for (ptr = 0; ptr < MAX_BUS_CLK; ptr++) { 8089320f7cbSMarek Szyprowski if (sc->clk_bus[ptr]) { 8099d51a6b2SMarek Szyprowski clk_put(sc->clk_bus[ptr]); 8109d51a6b2SMarek Szyprowski } 8119320f7cbSMarek Szyprowski } 8120f310a05SThomas Abraham clk_disable_unprepare(sc->clk_io); 8139d51a6b2SMarek Szyprowski clk_put(sc->clk_io); 8149d51a6b2SMarek Szyprowski 815cd1b00ebSThomas Abraham if (pdev->dev.of_node) { 816cd1b00ebSThomas Abraham for (ptr = 0; ptr < NUM_GPIOS(sc->pdata->max_width); ptr++) 817cd1b00ebSThomas Abraham gpio_free(sc->gpios[ptr]); 818cd1b00ebSThomas Abraham } 819cd1b00ebSThomas Abraham 8209d51a6b2SMarek Szyprowski sdhci_free_host(host); 8219d51a6b2SMarek Szyprowski platform_set_drvdata(pdev, NULL); 8229d51a6b2SMarek Szyprowski 8230d1bb41aSBen Dooks return 0; 8240d1bb41aSBen Dooks } 8250d1bb41aSBen Dooks 826d5e9c02cSMark Brown #ifdef CONFIG_PM_SLEEP 82729495aa0SManuel Lauss static int sdhci_s3c_suspend(struct device *dev) 8280d1bb41aSBen Dooks { 82929495aa0SManuel Lauss struct sdhci_host *host = dev_get_drvdata(dev); 8300d1bb41aSBen Dooks 83129495aa0SManuel Lauss return sdhci_suspend_host(host); 8320d1bb41aSBen Dooks } 8330d1bb41aSBen Dooks 83429495aa0SManuel Lauss static int sdhci_s3c_resume(struct device *dev) 8350d1bb41aSBen Dooks { 83629495aa0SManuel Lauss struct sdhci_host *host = dev_get_drvdata(dev); 8370d1bb41aSBen Dooks 83865d13516SWonil Choi return sdhci_resume_host(host); 8390d1bb41aSBen Dooks } 840d5e9c02cSMark Brown #endif 8410d1bb41aSBen Dooks 8429f4e8151SMark Brown #ifdef CONFIG_PM_RUNTIME 8439f4e8151SMark Brown static int sdhci_s3c_runtime_suspend(struct device *dev) 8449f4e8151SMark Brown { 8459f4e8151SMark Brown struct sdhci_host *host = dev_get_drvdata(dev); 8462abeb5c5SChander Kashyap struct sdhci_s3c *ourhost = to_s3c(host); 8472abeb5c5SChander Kashyap struct clk *busclk = ourhost->clk_io; 8482abeb5c5SChander Kashyap int ret; 8499f4e8151SMark Brown 8502abeb5c5SChander Kashyap ret = sdhci_runtime_suspend_host(host); 8512abeb5c5SChander Kashyap 8520f310a05SThomas Abraham clk_disable_unprepare(ourhost->clk_bus[ourhost->cur_clk]); 8530f310a05SThomas Abraham clk_disable_unprepare(busclk); 8542abeb5c5SChander Kashyap return ret; 8559f4e8151SMark Brown } 8569f4e8151SMark Brown 8579f4e8151SMark Brown static int sdhci_s3c_runtime_resume(struct device *dev) 8589f4e8151SMark Brown { 8599f4e8151SMark Brown struct sdhci_host *host = dev_get_drvdata(dev); 8602abeb5c5SChander Kashyap struct sdhci_s3c *ourhost = to_s3c(host); 8612abeb5c5SChander Kashyap struct clk *busclk = ourhost->clk_io; 8622abeb5c5SChander Kashyap int ret; 8639f4e8151SMark Brown 8640f310a05SThomas Abraham clk_prepare_enable(busclk); 8650f310a05SThomas Abraham clk_prepare_enable(ourhost->clk_bus[ourhost->cur_clk]); 8662abeb5c5SChander Kashyap ret = sdhci_runtime_resume_host(host); 8672abeb5c5SChander Kashyap return ret; 8689f4e8151SMark Brown } 8699f4e8151SMark Brown #endif 8709f4e8151SMark Brown 871d5e9c02cSMark Brown #ifdef CONFIG_PM 87229495aa0SManuel Lauss static const struct dev_pm_ops sdhci_s3c_pmops = { 873d5e9c02cSMark Brown SET_SYSTEM_SLEEP_PM_OPS(sdhci_s3c_suspend, sdhci_s3c_resume) 8749f4e8151SMark Brown SET_RUNTIME_PM_OPS(sdhci_s3c_runtime_suspend, sdhci_s3c_runtime_resume, 8759f4e8151SMark Brown NULL) 87629495aa0SManuel Lauss }; 87729495aa0SManuel Lauss 87829495aa0SManuel Lauss #define SDHCI_S3C_PMOPS (&sdhci_s3c_pmops) 87929495aa0SManuel Lauss 8800d1bb41aSBen Dooks #else 88129495aa0SManuel Lauss #define SDHCI_S3C_PMOPS NULL 8820d1bb41aSBen Dooks #endif 8830d1bb41aSBen Dooks 8843119936aSThomas Abraham #if defined(CONFIG_CPU_EXYNOS4210) || defined(CONFIG_SOC_EXYNOS4212) 8853119936aSThomas Abraham static struct sdhci_s3c_drv_data exynos4_sdhci_drv_data = { 8863119936aSThomas Abraham .sdhci_quirks = SDHCI_QUIRK_NONSTANDARD_CLOCK, 8873119936aSThomas Abraham }; 8883119936aSThomas Abraham #define EXYNOS4_SDHCI_DRV_DATA ((kernel_ulong_t)&exynos4_sdhci_drv_data) 8893119936aSThomas Abraham #else 8903119936aSThomas Abraham #define EXYNOS4_SDHCI_DRV_DATA ((kernel_ulong_t)NULL) 8913119936aSThomas Abraham #endif 8923119936aSThomas Abraham 8933119936aSThomas Abraham static struct platform_device_id sdhci_s3c_driver_ids[] = { 8943119936aSThomas Abraham { 8953119936aSThomas Abraham .name = "s3c-sdhci", 8963119936aSThomas Abraham .driver_data = (kernel_ulong_t)NULL, 8973119936aSThomas Abraham }, { 8983119936aSThomas Abraham .name = "exynos4-sdhci", 8993119936aSThomas Abraham .driver_data = EXYNOS4_SDHCI_DRV_DATA, 9003119936aSThomas Abraham }, 9013119936aSThomas Abraham { } 9023119936aSThomas Abraham }; 9033119936aSThomas Abraham MODULE_DEVICE_TABLE(platform, sdhci_s3c_driver_ids); 9043119936aSThomas Abraham 905cd1b00ebSThomas Abraham #ifdef CONFIG_OF 906cd1b00ebSThomas Abraham static const struct of_device_id sdhci_s3c_dt_match[] = { 907cd1b00ebSThomas Abraham { .compatible = "samsung,s3c6410-sdhci", }, 908cd1b00ebSThomas Abraham { .compatible = "samsung,exynos4210-sdhci", 909cd1b00ebSThomas Abraham .data = (void *)EXYNOS4_SDHCI_DRV_DATA }, 910cd1b00ebSThomas Abraham {}, 911cd1b00ebSThomas Abraham }; 912cd1b00ebSThomas Abraham MODULE_DEVICE_TABLE(of, sdhci_s3c_dt_match); 913cd1b00ebSThomas Abraham #endif 914cd1b00ebSThomas Abraham 9150d1bb41aSBen Dooks static struct platform_driver sdhci_s3c_driver = { 9160d1bb41aSBen Dooks .probe = sdhci_s3c_probe, 9170d1bb41aSBen Dooks .remove = __devexit_p(sdhci_s3c_remove), 9183119936aSThomas Abraham .id_table = sdhci_s3c_driver_ids, 9190d1bb41aSBen Dooks .driver = { 9200d1bb41aSBen Dooks .owner = THIS_MODULE, 9210d1bb41aSBen Dooks .name = "s3c-sdhci", 922cd1b00ebSThomas Abraham .of_match_table = of_match_ptr(sdhci_s3c_dt_match), 92329495aa0SManuel Lauss .pm = SDHCI_S3C_PMOPS, 9240d1bb41aSBen Dooks }, 9250d1bb41aSBen Dooks }; 9260d1bb41aSBen Dooks 927d1f81a64SAxel Lin module_platform_driver(sdhci_s3c_driver); 9280d1bb41aSBen Dooks 9290d1bb41aSBen Dooks MODULE_DESCRIPTION("Samsung SDHCI (HSMMC) glue"); 9300d1bb41aSBen Dooks MODULE_AUTHOR("Ben Dooks, <ben@simtec.co.uk>"); 9310d1bb41aSBen Dooks MODULE_LICENSE("GPL v2"); 9320d1bb41aSBen Dooks MODULE_ALIAS("platform:s3c-sdhci"); 933