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 360d1bb41aSBen Dooks /** 370d1bb41aSBen Dooks * struct sdhci_s3c - S3C SDHCI instance 380d1bb41aSBen Dooks * @host: The SDHCI host created 390d1bb41aSBen Dooks * @pdev: The platform device we where created from. 400d1bb41aSBen Dooks * @ioarea: The resource created when we claimed the IO area. 410d1bb41aSBen Dooks * @pdata: The platform data for this controller. 420d1bb41aSBen Dooks * @cur_clk: The index of the current bus clock. 430d1bb41aSBen Dooks * @clk_io: The clock for the internal bus interface. 440d1bb41aSBen Dooks * @clk_bus: The clocks that are available for the SD/MMC bus clock. 450d1bb41aSBen Dooks */ 460d1bb41aSBen Dooks struct sdhci_s3c { 470d1bb41aSBen Dooks struct sdhci_host *host; 480d1bb41aSBen Dooks struct platform_device *pdev; 490d1bb41aSBen Dooks struct resource *ioarea; 500d1bb41aSBen Dooks struct s3c_sdhci_platdata *pdata; 513ac147faSTomasz Figa int cur_clk; 5217866e14SMarek Szyprowski int ext_cd_irq; 5317866e14SMarek Szyprowski int ext_cd_gpio; 540d1bb41aSBen Dooks 550d1bb41aSBen Dooks struct clk *clk_io; 560d1bb41aSBen Dooks struct clk *clk_bus[MAX_BUS_CLK]; 576eb28bdcSTomasz Figa unsigned long clk_rates[MAX_BUS_CLK]; 580d1bb41aSBen Dooks }; 590d1bb41aSBen Dooks 603119936aSThomas Abraham /** 613119936aSThomas Abraham * struct sdhci_s3c_driver_data - S3C SDHCI platform specific driver data 623119936aSThomas Abraham * @sdhci_quirks: sdhci host specific quirks. 633119936aSThomas Abraham * 643119936aSThomas Abraham * Specifies platform specific configuration of sdhci controller. 653119936aSThomas Abraham * Note: A structure for driver specific platform data is used for future 663119936aSThomas Abraham * expansion of its usage. 673119936aSThomas Abraham */ 683119936aSThomas Abraham struct sdhci_s3c_drv_data { 693119936aSThomas Abraham unsigned int sdhci_quirks; 703119936aSThomas Abraham }; 713119936aSThomas Abraham 720d1bb41aSBen Dooks static inline struct sdhci_s3c *to_s3c(struct sdhci_host *host) 730d1bb41aSBen Dooks { 740d1bb41aSBen Dooks return sdhci_priv(host); 750d1bb41aSBen Dooks } 760d1bb41aSBen Dooks 770d1bb41aSBen Dooks /** 780d1bb41aSBen Dooks * sdhci_s3c_get_max_clk - callback to get maximum clock frequency. 790d1bb41aSBen Dooks * @host: The SDHCI host instance. 800d1bb41aSBen Dooks * 810d1bb41aSBen Dooks * Callback to return the maximum clock rate acheivable by the controller. 820d1bb41aSBen Dooks */ 830d1bb41aSBen Dooks static unsigned int sdhci_s3c_get_max_clk(struct sdhci_host *host) 840d1bb41aSBen Dooks { 850d1bb41aSBen Dooks struct sdhci_s3c *ourhost = to_s3c(host); 86222a13c5STomasz Figa unsigned long rate, max = 0; 87222a13c5STomasz Figa int src; 880d1bb41aSBen Dooks 89222a13c5STomasz Figa for (src = 0; src < MAX_BUS_CLK; src++) { 90222a13c5STomasz Figa rate = ourhost->clk_rates[src]; 910d1bb41aSBen Dooks if (rate > max) 920d1bb41aSBen Dooks max = rate; 930d1bb41aSBen Dooks } 940d1bb41aSBen Dooks 950d1bb41aSBen Dooks return max; 960d1bb41aSBen Dooks } 970d1bb41aSBen Dooks 980d1bb41aSBen Dooks /** 990d1bb41aSBen Dooks * sdhci_s3c_consider_clock - consider one the bus clocks for current setting 1000d1bb41aSBen Dooks * @ourhost: Our SDHCI instance. 1010d1bb41aSBen Dooks * @src: The source clock index. 1020d1bb41aSBen Dooks * @wanted: The clock frequency wanted. 1030d1bb41aSBen Dooks */ 1040d1bb41aSBen Dooks static unsigned int sdhci_s3c_consider_clock(struct sdhci_s3c *ourhost, 1050d1bb41aSBen Dooks unsigned int src, 1060d1bb41aSBen Dooks unsigned int wanted) 1070d1bb41aSBen Dooks { 1080d1bb41aSBen Dooks unsigned long rate; 1090d1bb41aSBen Dooks struct clk *clksrc = ourhost->clk_bus[src]; 1108880a4a5STomasz Figa int shift; 1110d1bb41aSBen Dooks 1128f4b78d9STomasz Figa if (IS_ERR(clksrc)) 1130d1bb41aSBen Dooks return UINT_MAX; 1140d1bb41aSBen Dooks 115253e0a7cSJeongbae Seo /* 1163119936aSThomas Abraham * If controller uses a non-standard clock division, find the best clock 1173119936aSThomas Abraham * speed possible with selected clock source and skip the division. 118253e0a7cSJeongbae Seo */ 1193119936aSThomas Abraham if (ourhost->host->quirks & SDHCI_QUIRK_NONSTANDARD_CLOCK) { 120253e0a7cSJeongbae Seo rate = clk_round_rate(clksrc, wanted); 121253e0a7cSJeongbae Seo return wanted - rate; 122253e0a7cSJeongbae Seo } 123253e0a7cSJeongbae Seo 1246eb28bdcSTomasz Figa rate = ourhost->clk_rates[src]; 1250d1bb41aSBen Dooks 12622003000STomasz Figa for (shift = 0; shift <= 8; ++shift) { 1278880a4a5STomasz Figa if ((rate >> shift) <= wanted) 1280d1bb41aSBen Dooks break; 1290d1bb41aSBen Dooks } 1300d1bb41aSBen Dooks 13122003000STomasz Figa if (shift > 8) { 13222003000STomasz Figa dev_dbg(&ourhost->pdev->dev, 13322003000STomasz Figa "clk %d: rate %ld, min rate %lu > wanted %u\n", 13422003000STomasz Figa src, rate, rate / 256, wanted); 13522003000STomasz Figa return UINT_MAX; 13622003000STomasz Figa } 13722003000STomasz Figa 1380d1bb41aSBen Dooks dev_dbg(&ourhost->pdev->dev, "clk %d: rate %ld, want %d, got %ld\n", 1398880a4a5STomasz Figa src, rate, wanted, rate >> shift); 1400d1bb41aSBen Dooks 1418880a4a5STomasz Figa return wanted - (rate >> shift); 1420d1bb41aSBen Dooks } 1430d1bb41aSBen Dooks 1440d1bb41aSBen Dooks /** 1450d1bb41aSBen Dooks * sdhci_s3c_set_clock - callback on clock change 1460d1bb41aSBen Dooks * @host: The SDHCI host being changed 1470d1bb41aSBen Dooks * @clock: The clock rate being requested. 1480d1bb41aSBen Dooks * 1490d1bb41aSBen Dooks * When the card's clock is going to be changed, look at the new frequency 1500d1bb41aSBen Dooks * and find the best clock source to go with it. 1510d1bb41aSBen Dooks */ 1520d1bb41aSBen Dooks static void sdhci_s3c_set_clock(struct sdhci_host *host, unsigned int clock) 1530d1bb41aSBen Dooks { 1540d1bb41aSBen Dooks struct sdhci_s3c *ourhost = to_s3c(host); 1550d1bb41aSBen Dooks unsigned int best = UINT_MAX; 1560d1bb41aSBen Dooks unsigned int delta; 1570d1bb41aSBen Dooks int best_src = 0; 1580d1bb41aSBen Dooks int src; 1590d1bb41aSBen Dooks u32 ctrl; 1600d1bb41aSBen Dooks 1610d1bb41aSBen Dooks /* don't bother if the clock is going off. */ 1620d1bb41aSBen Dooks if (clock == 0) 1630d1bb41aSBen Dooks return; 1640d1bb41aSBen Dooks 1650d1bb41aSBen Dooks for (src = 0; src < MAX_BUS_CLK; src++) { 1660d1bb41aSBen Dooks delta = sdhci_s3c_consider_clock(ourhost, src, clock); 1670d1bb41aSBen Dooks if (delta < best) { 1680d1bb41aSBen Dooks best = delta; 1690d1bb41aSBen Dooks best_src = src; 1700d1bb41aSBen Dooks } 1710d1bb41aSBen Dooks } 1720d1bb41aSBen Dooks 1730d1bb41aSBen Dooks dev_dbg(&ourhost->pdev->dev, 1740d1bb41aSBen Dooks "selected source %d, clock %d, delta %d\n", 1750d1bb41aSBen Dooks best_src, clock, best); 1760d1bb41aSBen Dooks 1770d1bb41aSBen Dooks /* select the new clock source */ 1780d1bb41aSBen Dooks if (ourhost->cur_clk != best_src) { 1790d1bb41aSBen Dooks struct clk *clk = ourhost->clk_bus[best_src]; 1800d1bb41aSBen Dooks 1810f310a05SThomas Abraham clk_prepare_enable(clk); 1823ac147faSTomasz Figa if (ourhost->cur_clk >= 0) 1833ac147faSTomasz Figa clk_disable_unprepare( 1843ac147faSTomasz Figa ourhost->clk_bus[ourhost->cur_clk]); 1850d1bb41aSBen Dooks 1860d1bb41aSBen Dooks ourhost->cur_clk = best_src; 1876eb28bdcSTomasz Figa host->max_clk = ourhost->clk_rates[best_src]; 1883ac147faSTomasz Figa } 1893ac147faSTomasz Figa 1903ac147faSTomasz Figa /* turn clock off to card before changing clock source */ 1913ac147faSTomasz Figa writew(0, host->ioaddr + SDHCI_CLOCK_CONTROL); 1920d1bb41aSBen Dooks 1930d1bb41aSBen Dooks ctrl = readl(host->ioaddr + S3C_SDHCI_CONTROL2); 1940d1bb41aSBen Dooks ctrl &= ~S3C_SDHCI_CTRL2_SELBASECLK_MASK; 1950d1bb41aSBen Dooks ctrl |= best_src << S3C_SDHCI_CTRL2_SELBASECLK_SHIFT; 1960d1bb41aSBen Dooks writel(ctrl, host->ioaddr + S3C_SDHCI_CONTROL2); 1970d1bb41aSBen Dooks 1986fe47179SThomas Abraham /* reprogram default hardware configuration */ 1996fe47179SThomas Abraham writel(S3C64XX_SDHCI_CONTROL4_DRIVE_9mA, 2006fe47179SThomas Abraham host->ioaddr + S3C64XX_SDHCI_CONTROL4); 2010d1bb41aSBen Dooks 2026fe47179SThomas Abraham ctrl = readl(host->ioaddr + S3C_SDHCI_CONTROL2); 2036fe47179SThomas Abraham ctrl |= (S3C64XX_SDHCI_CTRL2_ENSTAASYNCCLR | 2046fe47179SThomas Abraham S3C64XX_SDHCI_CTRL2_ENCMDCNFMSK | 2056fe47179SThomas Abraham S3C_SDHCI_CTRL2_ENFBCLKRX | 2066fe47179SThomas Abraham S3C_SDHCI_CTRL2_DFCNT_NONE | 2076fe47179SThomas Abraham S3C_SDHCI_CTRL2_ENCLKOUTHOLD); 2086fe47179SThomas Abraham writel(ctrl, host->ioaddr + S3C_SDHCI_CONTROL2); 2090d1bb41aSBen Dooks 2106fe47179SThomas Abraham /* reconfigure the controller for new clock rate */ 2116fe47179SThomas Abraham ctrl = (S3C_SDHCI_CTRL3_FCSEL1 | S3C_SDHCI_CTRL3_FCSEL0); 2126fe47179SThomas Abraham if (clock < 25 * 1000000) 2136fe47179SThomas Abraham ctrl |= (S3C_SDHCI_CTRL3_FCSEL3 | S3C_SDHCI_CTRL3_FCSEL2); 2146fe47179SThomas Abraham writel(ctrl, host->ioaddr + S3C_SDHCI_CONTROL3); 2150d1bb41aSBen Dooks } 2160d1bb41aSBen Dooks 217ce5f036bSMarek Szyprowski /** 218ce5f036bSMarek Szyprowski * sdhci_s3c_get_min_clock - callback to get minimal supported clock value 219ce5f036bSMarek Szyprowski * @host: The SDHCI host being queried 220ce5f036bSMarek Szyprowski * 221ce5f036bSMarek Szyprowski * To init mmc host properly a minimal clock value is needed. For high system 222ce5f036bSMarek Szyprowski * bus clock's values the standard formula gives values out of allowed range. 223ce5f036bSMarek Szyprowski * The clock still can be set to lower values, if clock source other then 224ce5f036bSMarek Szyprowski * system bus is selected. 225ce5f036bSMarek Szyprowski */ 226ce5f036bSMarek Szyprowski static unsigned int sdhci_s3c_get_min_clock(struct sdhci_host *host) 227ce5f036bSMarek Szyprowski { 228ce5f036bSMarek Szyprowski struct sdhci_s3c *ourhost = to_s3c(host); 229222a13c5STomasz Figa unsigned long rate, min = ULONG_MAX; 230ce5f036bSMarek Szyprowski int src; 231ce5f036bSMarek Szyprowski 232ce5f036bSMarek Szyprowski for (src = 0; src < MAX_BUS_CLK; src++) { 233222a13c5STomasz Figa rate = ourhost->clk_rates[src] / 256; 234222a13c5STomasz Figa if (!rate) 235ce5f036bSMarek Szyprowski continue; 236222a13c5STomasz Figa if (rate < min) 237222a13c5STomasz Figa min = rate; 238ce5f036bSMarek Szyprowski } 239222a13c5STomasz Figa 240ce5f036bSMarek Szyprowski return min; 241ce5f036bSMarek Szyprowski } 242ce5f036bSMarek Szyprowski 243253e0a7cSJeongbae Seo /* sdhci_cmu_get_max_clk - callback to get maximum clock frequency.*/ 244253e0a7cSJeongbae Seo static unsigned int sdhci_cmu_get_max_clock(struct sdhci_host *host) 245253e0a7cSJeongbae Seo { 246253e0a7cSJeongbae Seo struct sdhci_s3c *ourhost = to_s3c(host); 247222a13c5STomasz Figa unsigned long rate, max = 0; 248222a13c5STomasz Figa int src; 249253e0a7cSJeongbae Seo 250222a13c5STomasz Figa for (src = 0; src < MAX_BUS_CLK; src++) { 251222a13c5STomasz Figa struct clk *clk; 252222a13c5STomasz Figa 253222a13c5STomasz Figa clk = ourhost->clk_bus[src]; 254222a13c5STomasz Figa if (IS_ERR(clk)) 255222a13c5STomasz Figa continue; 256222a13c5STomasz Figa 257222a13c5STomasz Figa rate = clk_round_rate(clk, ULONG_MAX); 258222a13c5STomasz Figa if (rate > max) 259222a13c5STomasz Figa max = rate; 260222a13c5STomasz Figa } 261222a13c5STomasz Figa 262222a13c5STomasz Figa return max; 263253e0a7cSJeongbae Seo } 264253e0a7cSJeongbae Seo 265253e0a7cSJeongbae Seo /* sdhci_cmu_get_min_clock - callback to get minimal supported clock value. */ 266253e0a7cSJeongbae Seo static unsigned int sdhci_cmu_get_min_clock(struct sdhci_host *host) 267253e0a7cSJeongbae Seo { 268253e0a7cSJeongbae Seo struct sdhci_s3c *ourhost = to_s3c(host); 269222a13c5STomasz Figa unsigned long rate, min = ULONG_MAX; 270222a13c5STomasz Figa int src; 271253e0a7cSJeongbae Seo 272222a13c5STomasz Figa for (src = 0; src < MAX_BUS_CLK; src++) { 273222a13c5STomasz Figa struct clk *clk; 274222a13c5STomasz Figa 275222a13c5STomasz Figa clk = ourhost->clk_bus[src]; 276222a13c5STomasz Figa if (IS_ERR(clk)) 277222a13c5STomasz Figa continue; 278222a13c5STomasz Figa 279222a13c5STomasz Figa rate = clk_round_rate(clk, 0); 280222a13c5STomasz Figa if (rate < min) 281222a13c5STomasz Figa min = rate; 282222a13c5STomasz Figa } 283222a13c5STomasz Figa 284222a13c5STomasz Figa return min; 285253e0a7cSJeongbae Seo } 286253e0a7cSJeongbae Seo 287253e0a7cSJeongbae Seo /* sdhci_cmu_set_clock - callback on clock change.*/ 288253e0a7cSJeongbae Seo static void sdhci_cmu_set_clock(struct sdhci_host *host, unsigned int clock) 289253e0a7cSJeongbae Seo { 290253e0a7cSJeongbae Seo struct sdhci_s3c *ourhost = to_s3c(host); 2912ad0b249SJingoo Han struct device *dev = &ourhost->pdev->dev; 2923119936aSThomas Abraham unsigned long timeout; 2933119936aSThomas Abraham u16 clk = 0; 294253e0a7cSJeongbae Seo 2957ef2a5e2SJaehoon Chung /* If the clock is going off, set to 0 at clock control register */ 2967ef2a5e2SJaehoon Chung if (clock == 0) { 2977ef2a5e2SJaehoon Chung sdhci_writew(host, 0, SDHCI_CLOCK_CONTROL); 2987ef2a5e2SJaehoon Chung host->clock = clock; 299253e0a7cSJeongbae Seo return; 3007ef2a5e2SJaehoon Chung } 301253e0a7cSJeongbae Seo 302253e0a7cSJeongbae Seo sdhci_s3c_set_clock(host, clock); 303253e0a7cSJeongbae Seo 304253e0a7cSJeongbae Seo clk_set_rate(ourhost->clk_bus[ourhost->cur_clk], clock); 305253e0a7cSJeongbae Seo 306253e0a7cSJeongbae Seo host->clock = clock; 3073119936aSThomas Abraham 3083119936aSThomas Abraham clk = SDHCI_CLOCK_INT_EN; 3093119936aSThomas Abraham sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL); 3103119936aSThomas Abraham 3113119936aSThomas Abraham /* Wait max 20 ms */ 3123119936aSThomas Abraham timeout = 20; 3133119936aSThomas Abraham while (!((clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL)) 3143119936aSThomas Abraham & SDHCI_CLOCK_INT_STABLE)) { 3153119936aSThomas Abraham if (timeout == 0) { 3162ad0b249SJingoo Han dev_err(dev, "%s: Internal clock never stabilised.\n", 3172ad0b249SJingoo Han mmc_hostname(host->mmc)); 3183119936aSThomas Abraham return; 3193119936aSThomas Abraham } 3203119936aSThomas Abraham timeout--; 3213119936aSThomas Abraham mdelay(1); 3223119936aSThomas Abraham } 3233119936aSThomas Abraham 3243119936aSThomas Abraham clk |= SDHCI_CLOCK_CARD_EN; 3253119936aSThomas Abraham sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL); 326253e0a7cSJeongbae Seo } 327253e0a7cSJeongbae Seo 328548f07d2SJaehoon Chung /** 3292317f56cSRussell King * sdhci_s3c_set_bus_width - support 8bit buswidth 330548f07d2SJaehoon Chung * @host: The SDHCI host being queried 331548f07d2SJaehoon Chung * @width: MMC_BUS_WIDTH_ macro for the bus width being requested 332548f07d2SJaehoon Chung * 333548f07d2SJaehoon Chung * We have 8-bit width support but is not a v3 controller. 3347bc088d3SSascha Hauer * So we add platform_bus_width() and support 8bit width. 335548f07d2SJaehoon Chung */ 3362317f56cSRussell King static void sdhci_s3c_set_bus_width(struct sdhci_host *host, int width) 337548f07d2SJaehoon Chung { 338548f07d2SJaehoon Chung u8 ctrl; 339548f07d2SJaehoon Chung 340548f07d2SJaehoon Chung ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL); 341548f07d2SJaehoon Chung 342548f07d2SJaehoon Chung switch (width) { 343548f07d2SJaehoon Chung case MMC_BUS_WIDTH_8: 344548f07d2SJaehoon Chung ctrl |= SDHCI_CTRL_8BITBUS; 345548f07d2SJaehoon Chung ctrl &= ~SDHCI_CTRL_4BITBUS; 346548f07d2SJaehoon Chung break; 347548f07d2SJaehoon Chung case MMC_BUS_WIDTH_4: 348548f07d2SJaehoon Chung ctrl |= SDHCI_CTRL_4BITBUS; 349548f07d2SJaehoon Chung ctrl &= ~SDHCI_CTRL_8BITBUS; 350548f07d2SJaehoon Chung break; 351548f07d2SJaehoon Chung default: 35249bb1e61SGirish K S ctrl &= ~SDHCI_CTRL_4BITBUS; 35349bb1e61SGirish K S ctrl &= ~SDHCI_CTRL_8BITBUS; 354548f07d2SJaehoon Chung break; 355548f07d2SJaehoon Chung } 356548f07d2SJaehoon Chung 357548f07d2SJaehoon Chung sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL); 358548f07d2SJaehoon Chung } 359548f07d2SJaehoon Chung 3600d1bb41aSBen Dooks static struct sdhci_ops sdhci_s3c_ops = { 3610d1bb41aSBen Dooks .get_max_clock = sdhci_s3c_get_max_clk, 3620d1bb41aSBen Dooks .set_clock = sdhci_s3c_set_clock, 363ce5f036bSMarek Szyprowski .get_min_clock = sdhci_s3c_get_min_clock, 3642317f56cSRussell King .set_bus_width = sdhci_s3c_set_bus_width, 36503231f9bSRussell King .reset = sdhci_reset, 3660d1bb41aSBen Dooks }; 3670d1bb41aSBen Dooks 36817866e14SMarek Szyprowski static void sdhci_s3c_notify_change(struct platform_device *dev, int state) 36917866e14SMarek Szyprowski { 37017866e14SMarek Szyprowski struct sdhci_host *host = platform_get_drvdata(dev); 3714577f77bSSachin Kamat #ifdef CONFIG_PM_RUNTIME 372fe007c02SHeiko Stübner struct sdhci_s3c *sc = sdhci_priv(host); 3734577f77bSSachin Kamat #endif 37406fe577fSMarek Szyprowski unsigned long flags; 37506fe577fSMarek Szyprowski 37617866e14SMarek Szyprowski if (host) { 37706fe577fSMarek Szyprowski spin_lock_irqsave(&host->lock, flags); 37817866e14SMarek Szyprowski if (state) { 37917866e14SMarek Szyprowski dev_dbg(&dev->dev, "card inserted.\n"); 380fe007c02SHeiko Stübner #ifdef CONFIG_PM_RUNTIME 381fe007c02SHeiko Stübner clk_prepare_enable(sc->clk_io); 382fe007c02SHeiko Stübner #endif 38317866e14SMarek Szyprowski host->flags &= ~SDHCI_DEVICE_DEAD; 38417866e14SMarek Szyprowski host->quirks |= SDHCI_QUIRK_BROKEN_CARD_DETECTION; 38517866e14SMarek Szyprowski } else { 38617866e14SMarek Szyprowski dev_dbg(&dev->dev, "card removed.\n"); 38717866e14SMarek Szyprowski host->flags |= SDHCI_DEVICE_DEAD; 38817866e14SMarek Szyprowski host->quirks &= ~SDHCI_QUIRK_BROKEN_CARD_DETECTION; 389fe007c02SHeiko Stübner #ifdef CONFIG_PM_RUNTIME 390fe007c02SHeiko Stübner clk_disable_unprepare(sc->clk_io); 391fe007c02SHeiko Stübner #endif 39217866e14SMarek Szyprowski } 393f522886eSKyungmin Park tasklet_schedule(&host->card_tasklet); 39406fe577fSMarek Szyprowski spin_unlock_irqrestore(&host->lock, flags); 39517866e14SMarek Szyprowski } 39617866e14SMarek Szyprowski } 39717866e14SMarek Szyprowski 39817866e14SMarek Szyprowski static irqreturn_t sdhci_s3c_gpio_card_detect_thread(int irq, void *dev_id) 39917866e14SMarek Szyprowski { 40017866e14SMarek Szyprowski struct sdhci_s3c *sc = dev_id; 40117866e14SMarek Szyprowski int status = gpio_get_value(sc->ext_cd_gpio); 40217866e14SMarek Szyprowski if (sc->pdata->ext_cd_gpio_invert) 40317866e14SMarek Szyprowski status = !status; 40417866e14SMarek Szyprowski sdhci_s3c_notify_change(sc->pdev, status); 40517866e14SMarek Szyprowski return IRQ_HANDLED; 40617866e14SMarek Szyprowski } 40717866e14SMarek Szyprowski 40817866e14SMarek Szyprowski static void sdhci_s3c_setup_card_detect_gpio(struct sdhci_s3c *sc) 40917866e14SMarek Szyprowski { 41017866e14SMarek Szyprowski struct s3c_sdhci_platdata *pdata = sc->pdata; 41117866e14SMarek Szyprowski struct device *dev = &sc->pdev->dev; 41217866e14SMarek Szyprowski 413b1b8fea9STomasz Figa if (devm_gpio_request(dev, pdata->ext_cd_gpio, "SDHCI EXT CD") == 0) { 41417866e14SMarek Szyprowski sc->ext_cd_gpio = pdata->ext_cd_gpio; 41517866e14SMarek Szyprowski sc->ext_cd_irq = gpio_to_irq(pdata->ext_cd_gpio); 41617866e14SMarek Szyprowski if (sc->ext_cd_irq && 41717866e14SMarek Szyprowski request_threaded_irq(sc->ext_cd_irq, NULL, 41817866e14SMarek Szyprowski sdhci_s3c_gpio_card_detect_thread, 4192ad0b249SJingoo Han IRQF_TRIGGER_RISING | 4202ad0b249SJingoo Han IRQF_TRIGGER_FALLING | 4212ad0b249SJingoo Han IRQF_ONESHOT, 42217866e14SMarek Szyprowski dev_name(dev), sc) == 0) { 42317866e14SMarek Szyprowski int status = gpio_get_value(sc->ext_cd_gpio); 42417866e14SMarek Szyprowski if (pdata->ext_cd_gpio_invert) 42517866e14SMarek Szyprowski status = !status; 42617866e14SMarek Szyprowski sdhci_s3c_notify_change(sc->pdev, status); 42717866e14SMarek Szyprowski } else { 42817866e14SMarek Szyprowski dev_warn(dev, "cannot request irq for card detect\n"); 42917866e14SMarek Szyprowski sc->ext_cd_irq = 0; 43017866e14SMarek Szyprowski } 43117866e14SMarek Szyprowski } else { 43217866e14SMarek Szyprowski dev_err(dev, "cannot request gpio for card detect\n"); 43317866e14SMarek Szyprowski } 43417866e14SMarek Szyprowski } 43517866e14SMarek Szyprowski 436cd1b00ebSThomas Abraham #ifdef CONFIG_OF 437c3be1efdSBill Pemberton static int sdhci_s3c_parse_dt(struct device *dev, 438cd1b00ebSThomas Abraham struct sdhci_host *host, struct s3c_sdhci_platdata *pdata) 439cd1b00ebSThomas Abraham { 440cd1b00ebSThomas Abraham struct device_node *node = dev->of_node; 441cd1b00ebSThomas Abraham struct sdhci_s3c *ourhost = to_s3c(host); 442cd1b00ebSThomas Abraham u32 max_width; 443e19499aeSThomas Abraham int gpio; 444cd1b00ebSThomas Abraham 445cd1b00ebSThomas Abraham /* if the bus-width property is not specified, assume width as 1 */ 446cd1b00ebSThomas Abraham if (of_property_read_u32(node, "bus-width", &max_width)) 447cd1b00ebSThomas Abraham max_width = 1; 448cd1b00ebSThomas Abraham pdata->max_width = max_width; 449cd1b00ebSThomas Abraham 450cd1b00ebSThomas Abraham /* get the card detection method */ 451ab5023efSTushar Behera if (of_get_property(node, "broken-cd", NULL)) { 452cd1b00ebSThomas Abraham pdata->cd_type = S3C_SDHCI_CD_NONE; 453e19499aeSThomas Abraham return 0; 454cd1b00ebSThomas Abraham } 455cd1b00ebSThomas Abraham 456ab5023efSTushar Behera if (of_get_property(node, "non-removable", NULL)) { 457cd1b00ebSThomas Abraham pdata->cd_type = S3C_SDHCI_CD_PERMANENT; 458e19499aeSThomas Abraham return 0; 459cd1b00ebSThomas Abraham } 460cd1b00ebSThomas Abraham 461cd1b00ebSThomas Abraham gpio = of_get_named_gpio(node, "cd-gpios", 0); 462cd1b00ebSThomas Abraham if (gpio_is_valid(gpio)) { 463cd1b00ebSThomas Abraham pdata->cd_type = S3C_SDHCI_CD_GPIO; 464e19499aeSThomas Abraham pdata->ext_cd_gpio = gpio; 465e19499aeSThomas Abraham ourhost->ext_cd_gpio = -1; 466e19499aeSThomas Abraham if (of_get_property(node, "cd-inverted", NULL)) 467e19499aeSThomas Abraham pdata->ext_cd_gpio_invert = 1; 468e19499aeSThomas Abraham return 0; 469cd1b00ebSThomas Abraham } else if (gpio != -ENOENT) { 470cd1b00ebSThomas Abraham dev_err(dev, "invalid card detect gpio specified\n"); 471cd1b00ebSThomas Abraham return -EINVAL; 472cd1b00ebSThomas Abraham } 473cd1b00ebSThomas Abraham 474b96efccbSTomasz Figa /* assuming internal card detect that will be configured by pinctrl */ 475b96efccbSTomasz Figa pdata->cd_type = S3C_SDHCI_CD_INTERNAL; 476cd1b00ebSThomas Abraham return 0; 477cd1b00ebSThomas Abraham } 478cd1b00ebSThomas Abraham #else 479c3be1efdSBill Pemberton static int sdhci_s3c_parse_dt(struct device *dev, 480cd1b00ebSThomas Abraham struct sdhci_host *host, struct s3c_sdhci_platdata *pdata) 481cd1b00ebSThomas Abraham { 482cd1b00ebSThomas Abraham return -EINVAL; 483cd1b00ebSThomas Abraham } 484cd1b00ebSThomas Abraham #endif 485cd1b00ebSThomas Abraham 486cd1b00ebSThomas Abraham static const struct of_device_id sdhci_s3c_dt_match[]; 487cd1b00ebSThomas Abraham 4883119936aSThomas Abraham static inline struct sdhci_s3c_drv_data *sdhci_s3c_get_driver_data( 4893119936aSThomas Abraham struct platform_device *pdev) 4903119936aSThomas Abraham { 491cd1b00ebSThomas Abraham #ifdef CONFIG_OF 492cd1b00ebSThomas Abraham if (pdev->dev.of_node) { 493cd1b00ebSThomas Abraham const struct of_device_id *match; 494cd1b00ebSThomas Abraham match = of_match_node(sdhci_s3c_dt_match, pdev->dev.of_node); 495cd1b00ebSThomas Abraham return (struct sdhci_s3c_drv_data *)match->data; 496cd1b00ebSThomas Abraham } 497cd1b00ebSThomas Abraham #endif 4983119936aSThomas Abraham return (struct sdhci_s3c_drv_data *) 4993119936aSThomas Abraham platform_get_device_id(pdev)->driver_data; 5003119936aSThomas Abraham } 5013119936aSThomas Abraham 502c3be1efdSBill Pemberton static int sdhci_s3c_probe(struct platform_device *pdev) 5030d1bb41aSBen Dooks { 5041d4dc338SThomas Abraham struct s3c_sdhci_platdata *pdata; 5053119936aSThomas Abraham struct sdhci_s3c_drv_data *drv_data; 5060d1bb41aSBen Dooks struct device *dev = &pdev->dev; 5070d1bb41aSBen Dooks struct sdhci_host *host; 5080d1bb41aSBen Dooks struct sdhci_s3c *sc; 5090d1bb41aSBen Dooks struct resource *res; 5100d1bb41aSBen Dooks int ret, irq, ptr, clks; 5110d1bb41aSBen Dooks 512cd1b00ebSThomas Abraham if (!pdev->dev.platform_data && !pdev->dev.of_node) { 5130d1bb41aSBen Dooks dev_err(dev, "no device data specified\n"); 5140d1bb41aSBen Dooks return -ENOENT; 5150d1bb41aSBen Dooks } 5160d1bb41aSBen Dooks 5170d1bb41aSBen Dooks irq = platform_get_irq(pdev, 0); 5180d1bb41aSBen Dooks if (irq < 0) { 5190d1bb41aSBen Dooks dev_err(dev, "no irq specified\n"); 5200d1bb41aSBen Dooks return irq; 5210d1bb41aSBen Dooks } 5220d1bb41aSBen Dooks 5230d1bb41aSBen Dooks host = sdhci_alloc_host(dev, sizeof(struct sdhci_s3c)); 5240d1bb41aSBen Dooks if (IS_ERR(host)) { 5250d1bb41aSBen Dooks dev_err(dev, "sdhci_alloc_host() failed\n"); 5260d1bb41aSBen Dooks return PTR_ERR(host); 5270d1bb41aSBen Dooks } 528cd1b00ebSThomas Abraham sc = sdhci_priv(host); 5290d1bb41aSBen Dooks 5301d4dc338SThomas Abraham pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); 5311d4dc338SThomas Abraham if (!pdata) { 5321d4dc338SThomas Abraham ret = -ENOMEM; 533b1b8fea9STomasz Figa goto err_pdata_io_clk; 5341d4dc338SThomas Abraham } 535cd1b00ebSThomas Abraham 536cd1b00ebSThomas Abraham if (pdev->dev.of_node) { 537cd1b00ebSThomas Abraham ret = sdhci_s3c_parse_dt(&pdev->dev, host, pdata); 538cd1b00ebSThomas Abraham if (ret) 539b1b8fea9STomasz Figa goto err_pdata_io_clk; 540cd1b00ebSThomas Abraham } else { 5411d4dc338SThomas Abraham memcpy(pdata, pdev->dev.platform_data, sizeof(*pdata)); 542cd1b00ebSThomas Abraham sc->ext_cd_gpio = -1; /* invalid gpio number */ 543cd1b00ebSThomas Abraham } 5441d4dc338SThomas Abraham 5453119936aSThomas Abraham drv_data = sdhci_s3c_get_driver_data(pdev); 5460d1bb41aSBen Dooks 5470d1bb41aSBen Dooks sc->host = host; 5480d1bb41aSBen Dooks sc->pdev = pdev; 5490d1bb41aSBen Dooks sc->pdata = pdata; 5503ac147faSTomasz Figa sc->cur_clk = -1; 5510d1bb41aSBen Dooks 5520d1bb41aSBen Dooks platform_set_drvdata(pdev, host); 5530d1bb41aSBen Dooks 5543aaf7ba7SJingoo Han sc->clk_io = devm_clk_get(dev, "hsmmc"); 5550d1bb41aSBen Dooks if (IS_ERR(sc->clk_io)) { 5560d1bb41aSBen Dooks dev_err(dev, "failed to get io clock\n"); 5570d1bb41aSBen Dooks ret = PTR_ERR(sc->clk_io); 558b1b8fea9STomasz Figa goto err_pdata_io_clk; 5590d1bb41aSBen Dooks } 5600d1bb41aSBen Dooks 5610d1bb41aSBen Dooks /* enable the local io clock and keep it running for the moment. */ 5620f310a05SThomas Abraham clk_prepare_enable(sc->clk_io); 5630d1bb41aSBen Dooks 5640d1bb41aSBen Dooks for (clks = 0, ptr = 0; ptr < MAX_BUS_CLK; ptr++) { 5654346b6d9SRajeshwari Shinde char name[14]; 5660d1bb41aSBen Dooks 5674346b6d9SRajeshwari Shinde snprintf(name, 14, "mmc_busclk.%d", ptr); 5688f4b78d9STomasz Figa sc->clk_bus[ptr] = devm_clk_get(dev, name); 5698f4b78d9STomasz Figa if (IS_ERR(sc->clk_bus[ptr])) 5700d1bb41aSBen Dooks continue; 5710d1bb41aSBen Dooks 5720d1bb41aSBen Dooks clks++; 5736eb28bdcSTomasz Figa sc->clk_rates[ptr] = clk_get_rate(sc->clk_bus[ptr]); 5746eb28bdcSTomasz Figa 5750d1bb41aSBen Dooks dev_info(dev, "clock source %d: %s (%ld Hz)\n", 5766eb28bdcSTomasz Figa ptr, name, sc->clk_rates[ptr]); 5770d1bb41aSBen Dooks } 5780d1bb41aSBen Dooks 5790d1bb41aSBen Dooks if (clks == 0) { 5800d1bb41aSBen Dooks dev_err(dev, "failed to find any bus clocks\n"); 5810d1bb41aSBen Dooks ret = -ENOENT; 5820d1bb41aSBen Dooks goto err_no_busclks; 5830d1bb41aSBen Dooks } 5840d1bb41aSBen Dooks 5859bda6da7SJulia Lawall res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 586a3e2cd7fSThierry Reding host->ioaddr = devm_ioremap_resource(&pdev->dev, res); 587a3e2cd7fSThierry Reding if (IS_ERR(host->ioaddr)) { 588a3e2cd7fSThierry Reding ret = PTR_ERR(host->ioaddr); 5890d1bb41aSBen Dooks goto err_req_regs; 5900d1bb41aSBen Dooks } 5910d1bb41aSBen Dooks 5920d1bb41aSBen Dooks /* Ensure we have minimal gpio selected CMD/CLK/Detect */ 5930d1bb41aSBen Dooks if (pdata->cfg_gpio) 5940d1bb41aSBen Dooks pdata->cfg_gpio(pdev, pdata->max_width); 5950d1bb41aSBen Dooks 5960d1bb41aSBen Dooks host->hw_name = "samsung-hsmmc"; 5970d1bb41aSBen Dooks host->ops = &sdhci_s3c_ops; 5980d1bb41aSBen Dooks host->quirks = 0; 599285e244fSJaehoon Chung host->quirks2 = 0; 6000d1bb41aSBen Dooks host->irq = irq; 6010d1bb41aSBen Dooks 6020d1bb41aSBen Dooks /* Setup quirks for the controller */ 603b2e75effSThomas Abraham host->quirks |= SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC; 604a1d56460SMarek Szyprowski host->quirks |= SDHCI_QUIRK_NO_HISPD_BIT; 6053119936aSThomas Abraham if (drv_data) 6063119936aSThomas Abraham host->quirks |= drv_data->sdhci_quirks; 6070d1bb41aSBen Dooks 6080d1bb41aSBen Dooks #ifndef CONFIG_MMC_SDHCI_S3C_DMA 6090d1bb41aSBen Dooks 6100d1bb41aSBen Dooks /* we currently see overruns on errors, so disable the SDMA 6110d1bb41aSBen Dooks * support as well. */ 6120d1bb41aSBen Dooks host->quirks |= SDHCI_QUIRK_BROKEN_DMA; 6130d1bb41aSBen Dooks 6140d1bb41aSBen Dooks #endif /* CONFIG_MMC_SDHCI_S3C_DMA */ 6150d1bb41aSBen Dooks 6160d1bb41aSBen Dooks /* It seems we do not get an DATA transfer complete on non-busy 6170d1bb41aSBen Dooks * transfers, not sure if this is a problem with this specific 6180d1bb41aSBen Dooks * SDHCI block, or a missing configuration that needs to be set. */ 6190d1bb41aSBen Dooks host->quirks |= SDHCI_QUIRK_NO_BUSY_IRQ; 6200d1bb41aSBen Dooks 621732f0e31SKyungmin Park /* This host supports the Auto CMD12 */ 622732f0e31SKyungmin Park host->quirks |= SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12; 623732f0e31SKyungmin Park 6247199e2b6SJaehoon Chung /* Samsung SoCs need BROKEN_ADMA_ZEROLEN_DESC */ 6257199e2b6SJaehoon Chung host->quirks |= SDHCI_QUIRK_BROKEN_ADMA_ZEROLEN_DESC; 6267199e2b6SJaehoon Chung 62717866e14SMarek Szyprowski if (pdata->cd_type == S3C_SDHCI_CD_NONE || 62817866e14SMarek Szyprowski pdata->cd_type == S3C_SDHCI_CD_PERMANENT) 62917866e14SMarek Szyprowski host->quirks |= SDHCI_QUIRK_BROKEN_CARD_DETECTION; 63017866e14SMarek Szyprowski 63117866e14SMarek Szyprowski if (pdata->cd_type == S3C_SDHCI_CD_PERMANENT) 63217866e14SMarek Szyprowski host->mmc->caps = MMC_CAP_NONREMOVABLE; 63317866e14SMarek Szyprowski 6340d22c770SThomas Abraham switch (pdata->max_width) { 6350d22c770SThomas Abraham case 8: 6360d22c770SThomas Abraham host->mmc->caps |= MMC_CAP_8_BIT_DATA; 6370d22c770SThomas Abraham case 4: 6380d22c770SThomas Abraham host->mmc->caps |= MMC_CAP_4_BIT_DATA; 6390d22c770SThomas Abraham break; 6400d22c770SThomas Abraham } 6410d22c770SThomas Abraham 642fa1773ccSSangwook Lee if (pdata->pm_caps) 643fa1773ccSSangwook Lee host->mmc->pm_caps |= pdata->pm_caps; 644fa1773ccSSangwook Lee 6450d1bb41aSBen Dooks host->quirks |= (SDHCI_QUIRK_32BIT_DMA_ADDR | 6460d1bb41aSBen Dooks SDHCI_QUIRK_32BIT_DMA_SIZE); 6470d1bb41aSBen Dooks 6483fe42e07SHyuk Lee /* HSMMC on Samsung SoCs uses SDCLK as timeout clock */ 6493fe42e07SHyuk Lee host->quirks |= SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK; 6503fe42e07SHyuk Lee 651253e0a7cSJeongbae Seo /* 652253e0a7cSJeongbae Seo * If controller does not have internal clock divider, 653253e0a7cSJeongbae Seo * we can use overriding functions instead of default. 654253e0a7cSJeongbae Seo */ 6553119936aSThomas Abraham if (host->quirks & SDHCI_QUIRK_NONSTANDARD_CLOCK) { 656253e0a7cSJeongbae Seo sdhci_s3c_ops.set_clock = sdhci_cmu_set_clock; 657253e0a7cSJeongbae Seo sdhci_s3c_ops.get_min_clock = sdhci_cmu_get_min_clock; 658253e0a7cSJeongbae Seo sdhci_s3c_ops.get_max_clock = sdhci_cmu_get_max_clock; 659253e0a7cSJeongbae Seo } 660253e0a7cSJeongbae Seo 661b3824f2cSJeongbae Seo /* It supports additional host capabilities if needed */ 662b3824f2cSJeongbae Seo if (pdata->host_caps) 663b3824f2cSJeongbae Seo host->mmc->caps |= pdata->host_caps; 664b3824f2cSJeongbae Seo 665c1c4b66dSJaehoon Chung if (pdata->host_caps2) 666c1c4b66dSJaehoon Chung host->mmc->caps2 |= pdata->host_caps2; 667c1c4b66dSJaehoon Chung 6689f4e8151SMark Brown pm_runtime_enable(&pdev->dev); 6699f4e8151SMark Brown pm_runtime_set_autosuspend_delay(&pdev->dev, 50); 6709f4e8151SMark Brown pm_runtime_use_autosuspend(&pdev->dev); 6719f4e8151SMark Brown pm_suspend_ignore_children(&pdev->dev, 1); 6729f4e8151SMark Brown 6730d1bb41aSBen Dooks ret = sdhci_add_host(host); 6740d1bb41aSBen Dooks if (ret) { 6750d1bb41aSBen Dooks dev_err(dev, "sdhci_add_host() failed\n"); 6769f4e8151SMark Brown pm_runtime_forbid(&pdev->dev); 6779f4e8151SMark Brown pm_runtime_get_noresume(&pdev->dev); 6789bda6da7SJulia Lawall goto err_req_regs; 6790d1bb41aSBen Dooks } 6800d1bb41aSBen Dooks 68117866e14SMarek Szyprowski /* The following two methods of card detection might call 68217866e14SMarek Szyprowski sdhci_s3c_notify_change() immediately, so they can be called 68317866e14SMarek Szyprowski only after sdhci_add_host(). Setup errors are ignored. */ 68417866e14SMarek Szyprowski if (pdata->cd_type == S3C_SDHCI_CD_EXTERNAL && pdata->ext_cd_init) 68517866e14SMarek Szyprowski pdata->ext_cd_init(&sdhci_s3c_notify_change); 68617866e14SMarek Szyprowski if (pdata->cd_type == S3C_SDHCI_CD_GPIO && 68717866e14SMarek Szyprowski gpio_is_valid(pdata->ext_cd_gpio)) 68817866e14SMarek Szyprowski sdhci_s3c_setup_card_detect_gpio(sc); 68917866e14SMarek Szyprowski 6902abeb5c5SChander Kashyap #ifdef CONFIG_PM_RUNTIME 6910aa55c23SSeungwon Jeon if (pdata->cd_type != S3C_SDHCI_CD_INTERNAL) 6920f310a05SThomas Abraham clk_disable_unprepare(sc->clk_io); 6932abeb5c5SChander Kashyap #endif 6940d1bb41aSBen Dooks return 0; 6950d1bb41aSBen Dooks 6960d1bb41aSBen Dooks err_req_regs: 6970d1bb41aSBen Dooks err_no_busclks: 6980f310a05SThomas Abraham clk_disable_unprepare(sc->clk_io); 6990d1bb41aSBen Dooks 700b1b8fea9STomasz Figa err_pdata_io_clk: 7010d1bb41aSBen Dooks sdhci_free_host(host); 7020d1bb41aSBen Dooks 7030d1bb41aSBen Dooks return ret; 7040d1bb41aSBen Dooks } 7050d1bb41aSBen Dooks 7066e0ee714SBill Pemberton static int sdhci_s3c_remove(struct platform_device *pdev) 7070d1bb41aSBen Dooks { 7089d51a6b2SMarek Szyprowski struct sdhci_host *host = platform_get_drvdata(pdev); 7099d51a6b2SMarek Szyprowski struct sdhci_s3c *sc = sdhci_priv(host); 710cd1b00ebSThomas Abraham struct s3c_sdhci_platdata *pdata = sc->pdata; 7119d51a6b2SMarek Szyprowski 71217866e14SMarek Szyprowski if (pdata->cd_type == S3C_SDHCI_CD_EXTERNAL && pdata->ext_cd_cleanup) 71317866e14SMarek Szyprowski pdata->ext_cd_cleanup(&sdhci_s3c_notify_change); 71417866e14SMarek Szyprowski 71517866e14SMarek Szyprowski if (sc->ext_cd_irq) 71617866e14SMarek Szyprowski free_irq(sc->ext_cd_irq, sc); 71717866e14SMarek Szyprowski 7182abeb5c5SChander Kashyap #ifdef CONFIG_PM_RUNTIME 7190aa55c23SSeungwon Jeon if (pdata->cd_type != S3C_SDHCI_CD_INTERNAL) 7200f310a05SThomas Abraham clk_prepare_enable(sc->clk_io); 7212abeb5c5SChander Kashyap #endif 7229d51a6b2SMarek Szyprowski sdhci_remove_host(host, 1); 7239d51a6b2SMarek Szyprowski 724387a8cbdSChander Kashyap pm_runtime_dont_use_autosuspend(&pdev->dev); 7259f4e8151SMark Brown pm_runtime_disable(&pdev->dev); 7269f4e8151SMark Brown 7270f310a05SThomas Abraham clk_disable_unprepare(sc->clk_io); 7289d51a6b2SMarek Szyprowski 7299d51a6b2SMarek Szyprowski sdhci_free_host(host); 7309d51a6b2SMarek Szyprowski 7310d1bb41aSBen Dooks return 0; 7320d1bb41aSBen Dooks } 7330d1bb41aSBen Dooks 734d5e9c02cSMark Brown #ifdef CONFIG_PM_SLEEP 73529495aa0SManuel Lauss static int sdhci_s3c_suspend(struct device *dev) 7360d1bb41aSBen Dooks { 73729495aa0SManuel Lauss struct sdhci_host *host = dev_get_drvdata(dev); 7380d1bb41aSBen Dooks 73929495aa0SManuel Lauss return sdhci_suspend_host(host); 7400d1bb41aSBen Dooks } 7410d1bb41aSBen Dooks 74229495aa0SManuel Lauss static int sdhci_s3c_resume(struct device *dev) 7430d1bb41aSBen Dooks { 74429495aa0SManuel Lauss struct sdhci_host *host = dev_get_drvdata(dev); 7450d1bb41aSBen Dooks 74665d13516SWonil Choi return sdhci_resume_host(host); 7470d1bb41aSBen Dooks } 748d5e9c02cSMark Brown #endif 7490d1bb41aSBen Dooks 7509f4e8151SMark Brown #ifdef CONFIG_PM_RUNTIME 7519f4e8151SMark Brown static int sdhci_s3c_runtime_suspend(struct device *dev) 7529f4e8151SMark Brown { 7539f4e8151SMark Brown struct sdhci_host *host = dev_get_drvdata(dev); 7542abeb5c5SChander Kashyap struct sdhci_s3c *ourhost = to_s3c(host); 7552abeb5c5SChander Kashyap struct clk *busclk = ourhost->clk_io; 7562abeb5c5SChander Kashyap int ret; 7579f4e8151SMark Brown 7582abeb5c5SChander Kashyap ret = sdhci_runtime_suspend_host(host); 7592abeb5c5SChander Kashyap 7603ac147faSTomasz Figa if (ourhost->cur_clk >= 0) 7610f310a05SThomas Abraham clk_disable_unprepare(ourhost->clk_bus[ourhost->cur_clk]); 7620f310a05SThomas Abraham clk_disable_unprepare(busclk); 7632abeb5c5SChander Kashyap return ret; 7649f4e8151SMark Brown } 7659f4e8151SMark Brown 7669f4e8151SMark Brown static int sdhci_s3c_runtime_resume(struct device *dev) 7679f4e8151SMark Brown { 7689f4e8151SMark Brown struct sdhci_host *host = dev_get_drvdata(dev); 7692abeb5c5SChander Kashyap struct sdhci_s3c *ourhost = to_s3c(host); 7702abeb5c5SChander Kashyap struct clk *busclk = ourhost->clk_io; 7712abeb5c5SChander Kashyap int ret; 7729f4e8151SMark Brown 7730f310a05SThomas Abraham clk_prepare_enable(busclk); 7743ac147faSTomasz Figa if (ourhost->cur_clk >= 0) 7750f310a05SThomas Abraham clk_prepare_enable(ourhost->clk_bus[ourhost->cur_clk]); 7762abeb5c5SChander Kashyap ret = sdhci_runtime_resume_host(host); 7772abeb5c5SChander Kashyap return ret; 7789f4e8151SMark Brown } 7799f4e8151SMark Brown #endif 7809f4e8151SMark Brown 781d5e9c02cSMark Brown #ifdef CONFIG_PM 78229495aa0SManuel Lauss static const struct dev_pm_ops sdhci_s3c_pmops = { 783d5e9c02cSMark Brown SET_SYSTEM_SLEEP_PM_OPS(sdhci_s3c_suspend, sdhci_s3c_resume) 7849f4e8151SMark Brown SET_RUNTIME_PM_OPS(sdhci_s3c_runtime_suspend, sdhci_s3c_runtime_resume, 7859f4e8151SMark Brown NULL) 78629495aa0SManuel Lauss }; 78729495aa0SManuel Lauss 78829495aa0SManuel Lauss #define SDHCI_S3C_PMOPS (&sdhci_s3c_pmops) 78929495aa0SManuel Lauss 7900d1bb41aSBen Dooks #else 79129495aa0SManuel Lauss #define SDHCI_S3C_PMOPS NULL 7920d1bb41aSBen Dooks #endif 7930d1bb41aSBen Dooks 7943119936aSThomas Abraham #if defined(CONFIG_CPU_EXYNOS4210) || defined(CONFIG_SOC_EXYNOS4212) 7953119936aSThomas Abraham static struct sdhci_s3c_drv_data exynos4_sdhci_drv_data = { 7963119936aSThomas Abraham .sdhci_quirks = SDHCI_QUIRK_NONSTANDARD_CLOCK, 7973119936aSThomas Abraham }; 7983119936aSThomas Abraham #define EXYNOS4_SDHCI_DRV_DATA ((kernel_ulong_t)&exynos4_sdhci_drv_data) 7993119936aSThomas Abraham #else 8003119936aSThomas Abraham #define EXYNOS4_SDHCI_DRV_DATA ((kernel_ulong_t)NULL) 8013119936aSThomas Abraham #endif 8023119936aSThomas Abraham 8033119936aSThomas Abraham static struct platform_device_id sdhci_s3c_driver_ids[] = { 8043119936aSThomas Abraham { 8053119936aSThomas Abraham .name = "s3c-sdhci", 8063119936aSThomas Abraham .driver_data = (kernel_ulong_t)NULL, 8073119936aSThomas Abraham }, { 8083119936aSThomas Abraham .name = "exynos4-sdhci", 8093119936aSThomas Abraham .driver_data = EXYNOS4_SDHCI_DRV_DATA, 8103119936aSThomas Abraham }, 8113119936aSThomas Abraham { } 8123119936aSThomas Abraham }; 8133119936aSThomas Abraham MODULE_DEVICE_TABLE(platform, sdhci_s3c_driver_ids); 8143119936aSThomas Abraham 815cd1b00ebSThomas Abraham #ifdef CONFIG_OF 816cd1b00ebSThomas Abraham static const struct of_device_id sdhci_s3c_dt_match[] = { 817cd1b00ebSThomas Abraham { .compatible = "samsung,s3c6410-sdhci", }, 818cd1b00ebSThomas Abraham { .compatible = "samsung,exynos4210-sdhci", 819cd1b00ebSThomas Abraham .data = (void *)EXYNOS4_SDHCI_DRV_DATA }, 820cd1b00ebSThomas Abraham {}, 821cd1b00ebSThomas Abraham }; 822cd1b00ebSThomas Abraham MODULE_DEVICE_TABLE(of, sdhci_s3c_dt_match); 823cd1b00ebSThomas Abraham #endif 824cd1b00ebSThomas Abraham 8250d1bb41aSBen Dooks static struct platform_driver sdhci_s3c_driver = { 8260d1bb41aSBen Dooks .probe = sdhci_s3c_probe, 8270433c143SBill Pemberton .remove = sdhci_s3c_remove, 8283119936aSThomas Abraham .id_table = sdhci_s3c_driver_ids, 8290d1bb41aSBen Dooks .driver = { 8300d1bb41aSBen Dooks .owner = THIS_MODULE, 8310d1bb41aSBen Dooks .name = "s3c-sdhci", 832cd1b00ebSThomas Abraham .of_match_table = of_match_ptr(sdhci_s3c_dt_match), 83329495aa0SManuel Lauss .pm = SDHCI_S3C_PMOPS, 8340d1bb41aSBen Dooks }, 8350d1bb41aSBen Dooks }; 8360d1bb41aSBen Dooks 837d1f81a64SAxel Lin module_platform_driver(sdhci_s3c_driver); 8380d1bb41aSBen Dooks 8390d1bb41aSBen Dooks MODULE_DESCRIPTION("Samsung SDHCI (HSMMC) glue"); 8400d1bb41aSBen Dooks MODULE_AUTHOR("Ben Dooks, <ben@simtec.co.uk>"); 8410d1bb41aSBen Dooks MODULE_LICENSE("GPL v2"); 8420d1bb41aSBen Dooks MODULE_ALIAS("platform:s3c-sdhci"); 843