1d96be879SSascha Hauer /* 2d96be879SSascha Hauer * linux/drivers/mmc/host/mxcmmc.c - Freescale i.MX MMCI driver 3d96be879SSascha Hauer * 4d96be879SSascha Hauer * This is a driver for the SDHC controller found in Freescale MX2/MX3 5d96be879SSascha Hauer * SoCs. It is basically the same hardware as found on MX1 (imxmmc.c). 6d96be879SSascha Hauer * Unlike the hardware found on MX1, this hardware just works and does 73ad2f3fbSDaniel Mack * not need all the quirks found in imxmmc.c, hence the separate driver. 8d96be879SSascha Hauer * 9d96be879SSascha Hauer * Copyright (C) 2008 Sascha Hauer, Pengutronix <s.hauer@pengutronix.de> 10d96be879SSascha Hauer * Copyright (C) 2006 Pavel Pisa, PiKRON <ppisa@pikron.com> 11d96be879SSascha Hauer * 12d96be879SSascha Hauer * derived from pxamci.c by Russell King 13d96be879SSascha Hauer * 14d96be879SSascha Hauer * This program is free software; you can redistribute it and/or modify 15d96be879SSascha Hauer * it under the terms of the GNU General Public License version 2 as 16d96be879SSascha Hauer * published by the Free Software Foundation. 17d96be879SSascha Hauer * 18d96be879SSascha Hauer */ 19d96be879SSascha Hauer 20d96be879SSascha Hauer #include <linux/module.h> 21d96be879SSascha Hauer #include <linux/init.h> 22d96be879SSascha Hauer #include <linux/ioport.h> 23d96be879SSascha Hauer #include <linux/platform_device.h> 24d96be879SSascha Hauer #include <linux/interrupt.h> 25d96be879SSascha Hauer #include <linux/irq.h> 26d96be879SSascha Hauer #include <linux/blkdev.h> 27d96be879SSascha Hauer #include <linux/dma-mapping.h> 28d96be879SSascha Hauer #include <linux/mmc/host.h> 29d96be879SSascha Hauer #include <linux/mmc/card.h> 30d96be879SSascha Hauer #include <linux/delay.h> 31d96be879SSascha Hauer #include <linux/clk.h> 32d96be879SSascha Hauer #include <linux/io.h> 33d96be879SSascha Hauer #include <linux/gpio.h> 3474b66954SAlberto Panizzo #include <linux/regulator/consumer.h> 35f53fbde4SSascha Hauer #include <linux/dmaengine.h> 36258aea76SViresh Kumar #include <linux/types.h> 377ff747c4SMarkus Pargmann #include <linux/of.h> 387ff747c4SMarkus Pargmann #include <linux/of_device.h> 397ff747c4SMarkus Pargmann #include <linux/of_dma.h> 407ff747c4SMarkus Pargmann #include <linux/of_gpio.h> 41d96be879SSascha Hauer 42d96be879SSascha Hauer #include <asm/dma.h> 43d96be879SSascha Hauer #include <asm/irq.h> 44d96be879SSascha Hauer #include <asm/sizes.h> 4582906b13SArnd Bergmann #include <linux/platform_data/mmc-mxcmmc.h> 46d96be879SSascha Hauer 4782906b13SArnd Bergmann #include <linux/platform_data/dma-imx.h> 48d96be879SSascha Hauer 499563b1dbSSascha Hauer #define DRIVER_NAME "mxc-mmc" 50f6ad0a48SJavier Martin #define MXCMCI_TIMEOUT_MS 10000 51d96be879SSascha Hauer 52d96be879SSascha Hauer #define MMC_REG_STR_STP_CLK 0x00 53d96be879SSascha Hauer #define MMC_REG_STATUS 0x04 54d96be879SSascha Hauer #define MMC_REG_CLK_RATE 0x08 55d96be879SSascha Hauer #define MMC_REG_CMD_DAT_CONT 0x0C 56d96be879SSascha Hauer #define MMC_REG_RES_TO 0x10 57d96be879SSascha Hauer #define MMC_REG_READ_TO 0x14 58d96be879SSascha Hauer #define MMC_REG_BLK_LEN 0x18 59d96be879SSascha Hauer #define MMC_REG_NOB 0x1C 60d96be879SSascha Hauer #define MMC_REG_REV_NO 0x20 61d96be879SSascha Hauer #define MMC_REG_INT_CNTR 0x24 62d96be879SSascha Hauer #define MMC_REG_CMD 0x28 63d96be879SSascha Hauer #define MMC_REG_ARG 0x2C 64d96be879SSascha Hauer #define MMC_REG_RES_FIFO 0x34 65d96be879SSascha Hauer #define MMC_REG_BUFFER_ACCESS 0x38 66d96be879SSascha Hauer 67d96be879SSascha Hauer #define STR_STP_CLK_RESET (1 << 3) 68d96be879SSascha Hauer #define STR_STP_CLK_START_CLK (1 << 1) 69d96be879SSascha Hauer #define STR_STP_CLK_STOP_CLK (1 << 0) 70d96be879SSascha Hauer 71d96be879SSascha Hauer #define STATUS_CARD_INSERTION (1 << 31) 72d96be879SSascha Hauer #define STATUS_CARD_REMOVAL (1 << 30) 73d96be879SSascha Hauer #define STATUS_YBUF_EMPTY (1 << 29) 74d96be879SSascha Hauer #define STATUS_XBUF_EMPTY (1 << 28) 75d96be879SSascha Hauer #define STATUS_YBUF_FULL (1 << 27) 76d96be879SSascha Hauer #define STATUS_XBUF_FULL (1 << 26) 77d96be879SSascha Hauer #define STATUS_BUF_UND_RUN (1 << 25) 78d96be879SSascha Hauer #define STATUS_BUF_OVFL (1 << 24) 79d96be879SSascha Hauer #define STATUS_SDIO_INT_ACTIVE (1 << 14) 80d96be879SSascha Hauer #define STATUS_END_CMD_RESP (1 << 13) 81d96be879SSascha Hauer #define STATUS_WRITE_OP_DONE (1 << 12) 82d96be879SSascha Hauer #define STATUS_DATA_TRANS_DONE (1 << 11) 83d96be879SSascha Hauer #define STATUS_READ_OP_DONE (1 << 11) 84d96be879SSascha Hauer #define STATUS_WR_CRC_ERROR_CODE_MASK (3 << 10) 85d96be879SSascha Hauer #define STATUS_CARD_BUS_CLK_RUN (1 << 8) 86d96be879SSascha Hauer #define STATUS_BUF_READ_RDY (1 << 7) 87d96be879SSascha Hauer #define STATUS_BUF_WRITE_RDY (1 << 6) 88d96be879SSascha Hauer #define STATUS_RESP_CRC_ERR (1 << 5) 89d96be879SSascha Hauer #define STATUS_CRC_READ_ERR (1 << 3) 90d96be879SSascha Hauer #define STATUS_CRC_WRITE_ERR (1 << 2) 91d96be879SSascha Hauer #define STATUS_TIME_OUT_RESP (1 << 1) 92d96be879SSascha Hauer #define STATUS_TIME_OUT_READ (1 << 0) 93d96be879SSascha Hauer #define STATUS_ERR_MASK 0x2f 94d96be879SSascha Hauer 95d96be879SSascha Hauer #define CMD_DAT_CONT_CMD_RESP_LONG_OFF (1 << 12) 96d96be879SSascha Hauer #define CMD_DAT_CONT_STOP_READWAIT (1 << 11) 97d96be879SSascha Hauer #define CMD_DAT_CONT_START_READWAIT (1 << 10) 98d96be879SSascha Hauer #define CMD_DAT_CONT_BUS_WIDTH_4 (2 << 8) 99d96be879SSascha Hauer #define CMD_DAT_CONT_INIT (1 << 7) 100d96be879SSascha Hauer #define CMD_DAT_CONT_WRITE (1 << 4) 101d96be879SSascha Hauer #define CMD_DAT_CONT_DATA_ENABLE (1 << 3) 102d96be879SSascha Hauer #define CMD_DAT_CONT_RESPONSE_48BIT_CRC (1 << 0) 103d96be879SSascha Hauer #define CMD_DAT_CONT_RESPONSE_136BIT (2 << 0) 104d96be879SSascha Hauer #define CMD_DAT_CONT_RESPONSE_48BIT (3 << 0) 105d96be879SSascha Hauer 106d96be879SSascha Hauer #define INT_SDIO_INT_WKP_EN (1 << 18) 107d96be879SSascha Hauer #define INT_CARD_INSERTION_WKP_EN (1 << 17) 108d96be879SSascha Hauer #define INT_CARD_REMOVAL_WKP_EN (1 << 16) 109d96be879SSascha Hauer #define INT_CARD_INSERTION_EN (1 << 15) 110d96be879SSascha Hauer #define INT_CARD_REMOVAL_EN (1 << 14) 111d96be879SSascha Hauer #define INT_SDIO_IRQ_EN (1 << 13) 112d96be879SSascha Hauer #define INT_DAT0_EN (1 << 12) 113d96be879SSascha Hauer #define INT_BUF_READ_EN (1 << 4) 114d96be879SSascha Hauer #define INT_BUF_WRITE_EN (1 << 3) 115d96be879SSascha Hauer #define INT_END_CMD_RES_EN (1 << 2) 116d96be879SSascha Hauer #define INT_WRITE_OP_DONE_EN (1 << 1) 117d96be879SSascha Hauer #define INT_READ_OP_EN (1 << 0) 118d96be879SSascha Hauer 1197f917a8dSShawn Guo enum mxcmci_type { 1207f917a8dSShawn Guo IMX21_MMC, 1217f917a8dSShawn Guo IMX31_MMC, 1227f917a8dSShawn Guo }; 1237f917a8dSShawn Guo 124d96be879SSascha Hauer struct mxcmci_host { 125d96be879SSascha Hauer struct mmc_host *mmc; 126d96be879SSascha Hauer struct resource *res; 127d96be879SSascha Hauer void __iomem *base; 128d96be879SSascha Hauer int irq; 129d96be879SSascha Hauer int detect_irq; 130f53fbde4SSascha Hauer struct dma_chan *dma; 131f53fbde4SSascha Hauer struct dma_async_tx_descriptor *desc; 132d96be879SSascha Hauer int do_dma; 13316b3bf8cSEric Bénard int default_irq_mask; 134f441b993SDaniel Mack int use_sdio; 135d96be879SSascha Hauer unsigned int power_mode; 136d96be879SSascha Hauer struct imxmmc_platform_data *pdata; 137d96be879SSascha Hauer 138d96be879SSascha Hauer struct mmc_request *req; 139d96be879SSascha Hauer struct mmc_command *cmd; 140d96be879SSascha Hauer struct mmc_data *data; 141d96be879SSascha Hauer 142d96be879SSascha Hauer unsigned int datasize; 143d96be879SSascha Hauer unsigned int dma_dir; 144d96be879SSascha Hauer 145d96be879SSascha Hauer u16 rev_no; 146d96be879SSascha Hauer unsigned int cmdat; 147d96be879SSascha Hauer 148529aa29eSSascha Hauer struct clk *clk_ipg; 149529aa29eSSascha Hauer struct clk *clk_per; 150d96be879SSascha Hauer 151d96be879SSascha Hauer int clock; 152d96be879SSascha Hauer 153d96be879SSascha Hauer struct work_struct datawork; 154f441b993SDaniel Mack spinlock_t lock; 15574b66954SAlberto Panizzo 15674b66954SAlberto Panizzo struct regulator *vcc; 157f53fbde4SSascha Hauer 158f53fbde4SSascha Hauer int burstlen; 159f53fbde4SSascha Hauer int dmareq; 160f53fbde4SSascha Hauer struct dma_slave_config dma_slave_config; 161f53fbde4SSascha Hauer struct imx_dma_data dma_data; 162f6ad0a48SJavier Martin 163f6ad0a48SJavier Martin struct timer_list watchdog; 1647f917a8dSShawn Guo enum mxcmci_type devtype; 165d96be879SSascha Hauer }; 166d96be879SSascha Hauer 1677f917a8dSShawn Guo static struct platform_device_id mxcmci_devtype[] = { 1687f917a8dSShawn Guo { 1697f917a8dSShawn Guo .name = "imx21-mmc", 1707f917a8dSShawn Guo .driver_data = IMX21_MMC, 1717f917a8dSShawn Guo }, { 1727f917a8dSShawn Guo .name = "imx31-mmc", 1737f917a8dSShawn Guo .driver_data = IMX31_MMC, 1747f917a8dSShawn Guo }, { 1757f917a8dSShawn Guo /* sentinel */ 1767f917a8dSShawn Guo } 1777f917a8dSShawn Guo }; 1787f917a8dSShawn Guo MODULE_DEVICE_TABLE(platform, mxcmci_devtype); 1797f917a8dSShawn Guo 1807ff747c4SMarkus Pargmann static const struct of_device_id mxcmci_of_match[] = { 1817ff747c4SMarkus Pargmann { 1827ff747c4SMarkus Pargmann .compatible = "fsl,imx21-mmc", 1837ff747c4SMarkus Pargmann .data = &mxcmci_devtype[IMX21_MMC], 1847ff747c4SMarkus Pargmann }, { 1857ff747c4SMarkus Pargmann .compatible = "fsl,imx31-mmc", 1867ff747c4SMarkus Pargmann .data = &mxcmci_devtype[IMX31_MMC], 1877ff747c4SMarkus Pargmann }, { 1887ff747c4SMarkus Pargmann /* sentinel */ 1897ff747c4SMarkus Pargmann } 1907ff747c4SMarkus Pargmann }; 1917ff747c4SMarkus Pargmann MODULE_DEVICE_TABLE(of, mxcmci_of_match); 1927ff747c4SMarkus Pargmann 1937f917a8dSShawn Guo static inline int is_imx31_mmc(struct mxcmci_host *host) 1947f917a8dSShawn Guo { 1957f917a8dSShawn Guo return host->devtype == IMX31_MMC; 1967f917a8dSShawn Guo } 1977f917a8dSShawn Guo 19818489fa2SMartin Fuzzey static void mxcmci_set_clk_rate(struct mxcmci_host *host, unsigned int clk_ios); 19918489fa2SMartin Fuzzey 20074b66954SAlberto Panizzo static inline void mxcmci_init_ocr(struct mxcmci_host *host) 20174b66954SAlberto Panizzo { 20274b66954SAlberto Panizzo host->vcc = regulator_get(mmc_dev(host->mmc), "vmmc"); 20374b66954SAlberto Panizzo 20474b66954SAlberto Panizzo if (IS_ERR(host->vcc)) { 20574b66954SAlberto Panizzo host->vcc = NULL; 20674b66954SAlberto Panizzo } else { 20774b66954SAlberto Panizzo host->mmc->ocr_avail = mmc_regulator_get_ocrmask(host->vcc); 20874b66954SAlberto Panizzo if (host->pdata && host->pdata->ocr_avail) 20974b66954SAlberto Panizzo dev_warn(mmc_dev(host->mmc), 21074b66954SAlberto Panizzo "pdata->ocr_avail will not be used\n"); 21174b66954SAlberto Panizzo } 212d078d242SAlberto Panizzo 21374b66954SAlberto Panizzo if (host->vcc == NULL) { 21474b66954SAlberto Panizzo /* fall-back to platform data */ 21574b66954SAlberto Panizzo if (host->pdata && host->pdata->ocr_avail) 21674b66954SAlberto Panizzo host->mmc->ocr_avail = host->pdata->ocr_avail; 21774b66954SAlberto Panizzo else 21874b66954SAlberto Panizzo host->mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34; 21974b66954SAlberto Panizzo } 22074b66954SAlberto Panizzo } 22174b66954SAlberto Panizzo 222d078d242SAlberto Panizzo static inline void mxcmci_set_power(struct mxcmci_host *host, 223d078d242SAlberto Panizzo unsigned char power_mode, 224d078d242SAlberto Panizzo unsigned int vdd) 22574b66954SAlberto Panizzo { 226d078d242SAlberto Panizzo if (host->vcc) { 227d078d242SAlberto Panizzo if (power_mode == MMC_POWER_UP) 228d078d242SAlberto Panizzo mmc_regulator_set_ocr(host->mmc, host->vcc, vdd); 229d078d242SAlberto Panizzo else if (power_mode == MMC_POWER_OFF) 230d078d242SAlberto Panizzo mmc_regulator_set_ocr(host->mmc, host->vcc, 0); 231d078d242SAlberto Panizzo } 232d078d242SAlberto Panizzo 23374b66954SAlberto Panizzo if (host->pdata && host->pdata->setpower) 23474b66954SAlberto Panizzo host->pdata->setpower(mmc_dev(host->mmc), vdd); 23574b66954SAlberto Panizzo } 23674b66954SAlberto Panizzo 237d96be879SSascha Hauer static inline int mxcmci_use_dma(struct mxcmci_host *host) 238d96be879SSascha Hauer { 239d96be879SSascha Hauer return host->do_dma; 240d96be879SSascha Hauer } 241d96be879SSascha Hauer 242d96be879SSascha Hauer static void mxcmci_softreset(struct mxcmci_host *host) 243d96be879SSascha Hauer { 244d96be879SSascha Hauer int i; 245d96be879SSascha Hauer 2464725f6f1SDaniel Mack dev_dbg(mmc_dev(host->mmc), "mxcmci_softreset\n"); 2474725f6f1SDaniel Mack 248d96be879SSascha Hauer /* reset sequence */ 249d96be879SSascha Hauer writew(STR_STP_CLK_RESET, host->base + MMC_REG_STR_STP_CLK); 250d96be879SSascha Hauer writew(STR_STP_CLK_RESET | STR_STP_CLK_START_CLK, 251d96be879SSascha Hauer host->base + MMC_REG_STR_STP_CLK); 252d96be879SSascha Hauer 253d96be879SSascha Hauer for (i = 0; i < 8; i++) 254d96be879SSascha Hauer writew(STR_STP_CLK_START_CLK, host->base + MMC_REG_STR_STP_CLK); 255d96be879SSascha Hauer 256d96be879SSascha Hauer writew(0xff, host->base + MMC_REG_RES_TO); 257d96be879SSascha Hauer } 258f53fbde4SSascha Hauer static int mxcmci_setup_dma(struct mmc_host *mmc); 259d96be879SSascha Hauer 260656217d2SMartin Fuzzey static int mxcmci_setup_data(struct mxcmci_host *host, struct mmc_data *data) 261d96be879SSascha Hauer { 262d96be879SSascha Hauer unsigned int nob = data->blocks; 263d96be879SSascha Hauer unsigned int blksz = data->blksz; 264d96be879SSascha Hauer unsigned int datasize = nob * blksz; 265d96be879SSascha Hauer struct scatterlist *sg; 26605f5799cSVinod Koul enum dma_transfer_direction slave_dirn; 267f53fbde4SSascha Hauer int i, nents; 268f53fbde4SSascha Hauer 269d96be879SSascha Hauer if (data->flags & MMC_DATA_STREAM) 270d96be879SSascha Hauer nob = 0xffff; 271d96be879SSascha Hauer 272d96be879SSascha Hauer host->data = data; 273d96be879SSascha Hauer data->bytes_xfered = 0; 274d96be879SSascha Hauer 275d96be879SSascha Hauer writew(nob, host->base + MMC_REG_NOB); 276d96be879SSascha Hauer writew(blksz, host->base + MMC_REG_BLK_LEN); 277d96be879SSascha Hauer host->datasize = datasize; 278d96be879SSascha Hauer 279f53fbde4SSascha Hauer if (!mxcmci_use_dma(host)) 280f53fbde4SSascha Hauer return 0; 281f53fbde4SSascha Hauer 282d96be879SSascha Hauer for_each_sg(data->sg, sg, data->sg_len, i) { 2832cb53552SJavier Martin if (sg->offset & 3 || sg->length & 3 || sg->length < 512) { 284d96be879SSascha Hauer host->do_dma = 0; 285656217d2SMartin Fuzzey return 0; 286d96be879SSascha Hauer } 287d96be879SSascha Hauer } 288d96be879SSascha Hauer 28905f5799cSVinod Koul if (data->flags & MMC_DATA_READ) { 290d96be879SSascha Hauer host->dma_dir = DMA_FROM_DEVICE; 29105f5799cSVinod Koul slave_dirn = DMA_DEV_TO_MEM; 29205f5799cSVinod Koul } else { 293d96be879SSascha Hauer host->dma_dir = DMA_TO_DEVICE; 29405f5799cSVinod Koul slave_dirn = DMA_MEM_TO_DEV; 29505f5799cSVinod Koul } 296f53fbde4SSascha Hauer 297f53fbde4SSascha Hauer nents = dma_map_sg(host->dma->device->dev, data->sg, 298d96be879SSascha Hauer data->sg_len, host->dma_dir); 299f53fbde4SSascha Hauer if (nents != data->sg_len) 300f53fbde4SSascha Hauer return -EINVAL; 301d96be879SSascha Hauer 30216052827SAlexandre Bounine host->desc = dmaengine_prep_slave_sg(host->dma, 30305f5799cSVinod Koul data->sg, data->sg_len, slave_dirn, 304f53fbde4SSascha Hauer DMA_PREP_INTERRUPT | DMA_CTRL_ACK); 305d96be879SSascha Hauer 306f53fbde4SSascha Hauer if (!host->desc) { 307f53fbde4SSascha Hauer dma_unmap_sg(host->dma->device->dev, data->sg, data->sg_len, 308f53fbde4SSascha Hauer host->dma_dir); 309f53fbde4SSascha Hauer host->do_dma = 0; 310f53fbde4SSascha Hauer return 0; /* Fall back to PIO */ 311656217d2SMartin Fuzzey } 312d96be879SSascha Hauer wmb(); 313d96be879SSascha Hauer 314f53fbde4SSascha Hauer dmaengine_submit(host->desc); 315439aa0efSSascha Hauer dma_async_issue_pending(host->dma); 316f53fbde4SSascha Hauer 317f6ad0a48SJavier Martin mod_timer(&host->watchdog, jiffies + msecs_to_jiffies(MXCMCI_TIMEOUT_MS)); 318f6ad0a48SJavier Martin 319656217d2SMartin Fuzzey return 0; 320d96be879SSascha Hauer } 321d96be879SSascha Hauer 322f6ad0a48SJavier Martin static void mxcmci_cmd_done(struct mxcmci_host *host, unsigned int stat); 323f6ad0a48SJavier Martin static void mxcmci_data_done(struct mxcmci_host *host, unsigned int stat); 324f6ad0a48SJavier Martin 325f6ad0a48SJavier Martin static void mxcmci_dma_callback(void *data) 326f6ad0a48SJavier Martin { 327f6ad0a48SJavier Martin struct mxcmci_host *host = data; 328f6ad0a48SJavier Martin u32 stat; 329f6ad0a48SJavier Martin 330f6ad0a48SJavier Martin del_timer(&host->watchdog); 331f6ad0a48SJavier Martin 332f6ad0a48SJavier Martin stat = readl(host->base + MMC_REG_STATUS); 333f6ad0a48SJavier Martin writel(stat & ~STATUS_DATA_TRANS_DONE, host->base + MMC_REG_STATUS); 334f6ad0a48SJavier Martin 335f6ad0a48SJavier Martin dev_dbg(mmc_dev(host->mmc), "%s: 0x%08x\n", __func__, stat); 336f6ad0a48SJavier Martin 337f6ad0a48SJavier Martin if (stat & STATUS_READ_OP_DONE) 338f6ad0a48SJavier Martin writel(STATUS_READ_OP_DONE, host->base + MMC_REG_STATUS); 339f6ad0a48SJavier Martin 340f6ad0a48SJavier Martin mxcmci_data_done(host, stat); 341f6ad0a48SJavier Martin } 342f6ad0a48SJavier Martin 343d96be879SSascha Hauer static int mxcmci_start_cmd(struct mxcmci_host *host, struct mmc_command *cmd, 344d96be879SSascha Hauer unsigned int cmdat) 345d96be879SSascha Hauer { 34616b3bf8cSEric Bénard u32 int_cntr = host->default_irq_mask; 347f441b993SDaniel Mack unsigned long flags; 348f441b993SDaniel Mack 349d96be879SSascha Hauer WARN_ON(host->cmd != NULL); 350d96be879SSascha Hauer host->cmd = cmd; 351d96be879SSascha Hauer 352d96be879SSascha Hauer switch (mmc_resp_type(cmd)) { 353d96be879SSascha Hauer case MMC_RSP_R1: /* short CRC, OPCODE */ 354d96be879SSascha Hauer case MMC_RSP_R1B:/* short CRC, OPCODE, BUSY */ 355d96be879SSascha Hauer cmdat |= CMD_DAT_CONT_RESPONSE_48BIT_CRC; 356d96be879SSascha Hauer break; 357d96be879SSascha Hauer case MMC_RSP_R2: /* long 136 bit + CRC */ 358d96be879SSascha Hauer cmdat |= CMD_DAT_CONT_RESPONSE_136BIT; 359d96be879SSascha Hauer break; 360d96be879SSascha Hauer case MMC_RSP_R3: /* short */ 361d96be879SSascha Hauer cmdat |= CMD_DAT_CONT_RESPONSE_48BIT; 362d96be879SSascha Hauer break; 363d96be879SSascha Hauer case MMC_RSP_NONE: 364d96be879SSascha Hauer break; 365d96be879SSascha Hauer default: 366d96be879SSascha Hauer dev_err(mmc_dev(host->mmc), "unhandled response type 0x%x\n", 367d96be879SSascha Hauer mmc_resp_type(cmd)); 368d96be879SSascha Hauer cmd->error = -EINVAL; 369d96be879SSascha Hauer return -EINVAL; 370d96be879SSascha Hauer } 371d96be879SSascha Hauer 372f441b993SDaniel Mack int_cntr = INT_END_CMD_RES_EN; 373f441b993SDaniel Mack 374f6ad0a48SJavier Martin if (mxcmci_use_dma(host)) { 375f6ad0a48SJavier Martin if (host->dma_dir == DMA_FROM_DEVICE) { 376f6ad0a48SJavier Martin host->desc->callback = mxcmci_dma_callback; 377f6ad0a48SJavier Martin host->desc->callback_param = host; 378f6ad0a48SJavier Martin } else { 379f6ad0a48SJavier Martin int_cntr |= INT_WRITE_OP_DONE_EN; 380f6ad0a48SJavier Martin } 381f6ad0a48SJavier Martin } 382f441b993SDaniel Mack 383f441b993SDaniel Mack spin_lock_irqsave(&host->lock, flags); 384f441b993SDaniel Mack if (host->use_sdio) 385f441b993SDaniel Mack int_cntr |= INT_SDIO_IRQ_EN; 386f441b993SDaniel Mack writel(int_cntr, host->base + MMC_REG_INT_CNTR); 387f441b993SDaniel Mack spin_unlock_irqrestore(&host->lock, flags); 388d96be879SSascha Hauer 389d96be879SSascha Hauer writew(cmd->opcode, host->base + MMC_REG_CMD); 390d96be879SSascha Hauer writel(cmd->arg, host->base + MMC_REG_ARG); 391d96be879SSascha Hauer writew(cmdat, host->base + MMC_REG_CMD_DAT_CONT); 392d96be879SSascha Hauer 393d96be879SSascha Hauer return 0; 394d96be879SSascha Hauer } 395d96be879SSascha Hauer 396d96be879SSascha Hauer static void mxcmci_finish_request(struct mxcmci_host *host, 397d96be879SSascha Hauer struct mmc_request *req) 398d96be879SSascha Hauer { 39916b3bf8cSEric Bénard u32 int_cntr = host->default_irq_mask; 400f441b993SDaniel Mack unsigned long flags; 401f441b993SDaniel Mack 402f441b993SDaniel Mack spin_lock_irqsave(&host->lock, flags); 403f441b993SDaniel Mack if (host->use_sdio) 404f441b993SDaniel Mack int_cntr |= INT_SDIO_IRQ_EN; 405f441b993SDaniel Mack writel(int_cntr, host->base + MMC_REG_INT_CNTR); 406f441b993SDaniel Mack spin_unlock_irqrestore(&host->lock, flags); 407d96be879SSascha Hauer 408d96be879SSascha Hauer host->req = NULL; 409d96be879SSascha Hauer host->cmd = NULL; 410d96be879SSascha Hauer host->data = NULL; 411d96be879SSascha Hauer 412d96be879SSascha Hauer mmc_request_done(host->mmc, req); 413d96be879SSascha Hauer } 414d96be879SSascha Hauer 415d96be879SSascha Hauer static int mxcmci_finish_data(struct mxcmci_host *host, unsigned int stat) 416d96be879SSascha Hauer { 417d96be879SSascha Hauer struct mmc_data *data = host->data; 418d96be879SSascha Hauer int data_error; 419d96be879SSascha Hauer 420f6ad0a48SJavier Martin if (mxcmci_use_dma(host)) 421f53fbde4SSascha Hauer dma_unmap_sg(host->dma->device->dev, data->sg, data->sg_len, 422d96be879SSascha Hauer host->dma_dir); 423d96be879SSascha Hauer 424d96be879SSascha Hauer if (stat & STATUS_ERR_MASK) { 425d96be879SSascha Hauer dev_dbg(mmc_dev(host->mmc), "request failed. status: 0x%08x\n", 426d96be879SSascha Hauer stat); 427d96be879SSascha Hauer if (stat & STATUS_CRC_READ_ERR) { 4284725f6f1SDaniel Mack dev_err(mmc_dev(host->mmc), "%s: -EILSEQ\n", __func__); 429d96be879SSascha Hauer data->error = -EILSEQ; 430d96be879SSascha Hauer } else if (stat & STATUS_CRC_WRITE_ERR) { 431d96be879SSascha Hauer u32 err_code = (stat >> 9) & 0x3; 4324725f6f1SDaniel Mack if (err_code == 2) { /* No CRC response */ 4334725f6f1SDaniel Mack dev_err(mmc_dev(host->mmc), 4344725f6f1SDaniel Mack "%s: No CRC -ETIMEDOUT\n", __func__); 435d96be879SSascha Hauer data->error = -ETIMEDOUT; 436d96be879SSascha Hauer } else { 4374725f6f1SDaniel Mack dev_err(mmc_dev(host->mmc), 4384725f6f1SDaniel Mack "%s: -EILSEQ\n", __func__); 4394725f6f1SDaniel Mack data->error = -EILSEQ; 4404725f6f1SDaniel Mack } 4414725f6f1SDaniel Mack } else if (stat & STATUS_TIME_OUT_READ) { 4424725f6f1SDaniel Mack dev_err(mmc_dev(host->mmc), 4434725f6f1SDaniel Mack "%s: read -ETIMEDOUT\n", __func__); 4444725f6f1SDaniel Mack data->error = -ETIMEDOUT; 4454725f6f1SDaniel Mack } else { 4464725f6f1SDaniel Mack dev_err(mmc_dev(host->mmc), "%s: -EIO\n", __func__); 447d96be879SSascha Hauer data->error = -EIO; 448d96be879SSascha Hauer } 449d96be879SSascha Hauer } else { 450d96be879SSascha Hauer data->bytes_xfered = host->datasize; 451d96be879SSascha Hauer } 452d96be879SSascha Hauer 453d96be879SSascha Hauer data_error = data->error; 454d96be879SSascha Hauer 455d96be879SSascha Hauer host->data = NULL; 456d96be879SSascha Hauer 457d96be879SSascha Hauer return data_error; 458d96be879SSascha Hauer } 459d96be879SSascha Hauer 460d96be879SSascha Hauer static void mxcmci_read_response(struct mxcmci_host *host, unsigned int stat) 461d96be879SSascha Hauer { 462d96be879SSascha Hauer struct mmc_command *cmd = host->cmd; 463d96be879SSascha Hauer int i; 464d96be879SSascha Hauer u32 a, b, c; 465d96be879SSascha Hauer 466d96be879SSascha Hauer if (!cmd) 467d96be879SSascha Hauer return; 468d96be879SSascha Hauer 469d96be879SSascha Hauer if (stat & STATUS_TIME_OUT_RESP) { 470d96be879SSascha Hauer dev_dbg(mmc_dev(host->mmc), "CMD TIMEOUT\n"); 471d96be879SSascha Hauer cmd->error = -ETIMEDOUT; 472d96be879SSascha Hauer } else if (stat & STATUS_RESP_CRC_ERR && cmd->flags & MMC_RSP_CRC) { 473d96be879SSascha Hauer dev_dbg(mmc_dev(host->mmc), "cmd crc error\n"); 474d96be879SSascha Hauer cmd->error = -EILSEQ; 475d96be879SSascha Hauer } 476d96be879SSascha Hauer 477d96be879SSascha Hauer if (cmd->flags & MMC_RSP_PRESENT) { 478d96be879SSascha Hauer if (cmd->flags & MMC_RSP_136) { 479d96be879SSascha Hauer for (i = 0; i < 4; i++) { 480d96be879SSascha Hauer a = readw(host->base + MMC_REG_RES_FIFO); 481d96be879SSascha Hauer b = readw(host->base + MMC_REG_RES_FIFO); 482d96be879SSascha Hauer cmd->resp[i] = a << 16 | b; 483d96be879SSascha Hauer } 484d96be879SSascha Hauer } else { 485d96be879SSascha Hauer a = readw(host->base + MMC_REG_RES_FIFO); 486d96be879SSascha Hauer b = readw(host->base + MMC_REG_RES_FIFO); 487d96be879SSascha Hauer c = readw(host->base + MMC_REG_RES_FIFO); 488d96be879SSascha Hauer cmd->resp[0] = a << 24 | b << 8 | c >> 8; 489d96be879SSascha Hauer } 490d96be879SSascha Hauer } 491d96be879SSascha Hauer } 492d96be879SSascha Hauer 493d96be879SSascha Hauer static int mxcmci_poll_status(struct mxcmci_host *host, u32 mask) 494d96be879SSascha Hauer { 495d96be879SSascha Hauer u32 stat; 496d96be879SSascha Hauer unsigned long timeout = jiffies + HZ; 497d96be879SSascha Hauer 498d96be879SSascha Hauer do { 499d96be879SSascha Hauer stat = readl(host->base + MMC_REG_STATUS); 500d96be879SSascha Hauer if (stat & STATUS_ERR_MASK) 501d96be879SSascha Hauer return stat; 50218489fa2SMartin Fuzzey if (time_after(jiffies, timeout)) { 50318489fa2SMartin Fuzzey mxcmci_softreset(host); 50418489fa2SMartin Fuzzey mxcmci_set_clk_rate(host, host->clock); 505d96be879SSascha Hauer return STATUS_TIME_OUT_READ; 50618489fa2SMartin Fuzzey } 507d96be879SSascha Hauer if (stat & mask) 508d96be879SSascha Hauer return 0; 509d96be879SSascha Hauer cpu_relax(); 510d96be879SSascha Hauer } while (1); 511d96be879SSascha Hauer } 512d96be879SSascha Hauer 513d96be879SSascha Hauer static int mxcmci_pull(struct mxcmci_host *host, void *_buf, int bytes) 514d96be879SSascha Hauer { 515d96be879SSascha Hauer unsigned int stat; 516d96be879SSascha Hauer u32 *buf = _buf; 517d96be879SSascha Hauer 518d96be879SSascha Hauer while (bytes > 3) { 519d96be879SSascha Hauer stat = mxcmci_poll_status(host, 520d96be879SSascha Hauer STATUS_BUF_READ_RDY | STATUS_READ_OP_DONE); 521d96be879SSascha Hauer if (stat) 522d96be879SSascha Hauer return stat; 523d96be879SSascha Hauer *buf++ = readl(host->base + MMC_REG_BUFFER_ACCESS); 524d96be879SSascha Hauer bytes -= 4; 525d96be879SSascha Hauer } 526d96be879SSascha Hauer 527d96be879SSascha Hauer if (bytes) { 528d96be879SSascha Hauer u8 *b = (u8 *)buf; 529d96be879SSascha Hauer u32 tmp; 530d96be879SSascha Hauer 531d96be879SSascha Hauer stat = mxcmci_poll_status(host, 532d96be879SSascha Hauer STATUS_BUF_READ_RDY | STATUS_READ_OP_DONE); 533d96be879SSascha Hauer if (stat) 534d96be879SSascha Hauer return stat; 535d96be879SSascha Hauer tmp = readl(host->base + MMC_REG_BUFFER_ACCESS); 536d96be879SSascha Hauer memcpy(b, &tmp, bytes); 537d96be879SSascha Hauer } 538d96be879SSascha Hauer 539d96be879SSascha Hauer return 0; 540d96be879SSascha Hauer } 541d96be879SSascha Hauer 542d96be879SSascha Hauer static int mxcmci_push(struct mxcmci_host *host, void *_buf, int bytes) 543d96be879SSascha Hauer { 544d96be879SSascha Hauer unsigned int stat; 545d96be879SSascha Hauer u32 *buf = _buf; 546d96be879SSascha Hauer 547d96be879SSascha Hauer while (bytes > 3) { 548d96be879SSascha Hauer stat = mxcmci_poll_status(host, STATUS_BUF_WRITE_RDY); 549d96be879SSascha Hauer if (stat) 550d96be879SSascha Hauer return stat; 551d96be879SSascha Hauer writel(*buf++, host->base + MMC_REG_BUFFER_ACCESS); 552d96be879SSascha Hauer bytes -= 4; 553d96be879SSascha Hauer } 554d96be879SSascha Hauer 555d96be879SSascha Hauer if (bytes) { 556d96be879SSascha Hauer u8 *b = (u8 *)buf; 557d96be879SSascha Hauer u32 tmp; 558d96be879SSascha Hauer 559d96be879SSascha Hauer stat = mxcmci_poll_status(host, STATUS_BUF_WRITE_RDY); 560d96be879SSascha Hauer if (stat) 561d96be879SSascha Hauer return stat; 562d96be879SSascha Hauer 563d96be879SSascha Hauer memcpy(&tmp, b, bytes); 564d96be879SSascha Hauer writel(tmp, host->base + MMC_REG_BUFFER_ACCESS); 565d96be879SSascha Hauer } 566d96be879SSascha Hauer 567d96be879SSascha Hauer stat = mxcmci_poll_status(host, STATUS_BUF_WRITE_RDY); 568d96be879SSascha Hauer if (stat) 569d96be879SSascha Hauer return stat; 570d96be879SSascha Hauer 571d96be879SSascha Hauer return 0; 572d96be879SSascha Hauer } 573d96be879SSascha Hauer 574d96be879SSascha Hauer static int mxcmci_transfer_data(struct mxcmci_host *host) 575d96be879SSascha Hauer { 576d96be879SSascha Hauer struct mmc_data *data = host->req->data; 577d96be879SSascha Hauer struct scatterlist *sg; 578d96be879SSascha Hauer int stat, i; 579d96be879SSascha Hauer 580d96be879SSascha Hauer host->data = data; 581d96be879SSascha Hauer host->datasize = 0; 582d96be879SSascha Hauer 583d96be879SSascha Hauer if (data->flags & MMC_DATA_READ) { 584d96be879SSascha Hauer for_each_sg(data->sg, sg, data->sg_len, i) { 585d96be879SSascha Hauer stat = mxcmci_pull(host, sg_virt(sg), sg->length); 586d96be879SSascha Hauer if (stat) 587d96be879SSascha Hauer return stat; 588d96be879SSascha Hauer host->datasize += sg->length; 589d96be879SSascha Hauer } 590d96be879SSascha Hauer } else { 591d96be879SSascha Hauer for_each_sg(data->sg, sg, data->sg_len, i) { 592d96be879SSascha Hauer stat = mxcmci_push(host, sg_virt(sg), sg->length); 593d96be879SSascha Hauer if (stat) 594d96be879SSascha Hauer return stat; 595d96be879SSascha Hauer host->datasize += sg->length; 596d96be879SSascha Hauer } 597d96be879SSascha Hauer stat = mxcmci_poll_status(host, STATUS_WRITE_OP_DONE); 598d96be879SSascha Hauer if (stat) 599d96be879SSascha Hauer return stat; 600d96be879SSascha Hauer } 601d96be879SSascha Hauer return 0; 602d96be879SSascha Hauer } 603d96be879SSascha Hauer 604d96be879SSascha Hauer static void mxcmci_datawork(struct work_struct *work) 605d96be879SSascha Hauer { 606d96be879SSascha Hauer struct mxcmci_host *host = container_of(work, struct mxcmci_host, 607d96be879SSascha Hauer datawork); 608d96be879SSascha Hauer int datastat = mxcmci_transfer_data(host); 6094a31f2efSDaniel Mack 6104a31f2efSDaniel Mack writel(STATUS_READ_OP_DONE | STATUS_WRITE_OP_DONE, 6114a31f2efSDaniel Mack host->base + MMC_REG_STATUS); 612d96be879SSascha Hauer mxcmci_finish_data(host, datastat); 613d96be879SSascha Hauer 614d96be879SSascha Hauer if (host->req->stop) { 615d96be879SSascha Hauer if (mxcmci_start_cmd(host, host->req->stop, 0)) { 616d96be879SSascha Hauer mxcmci_finish_request(host, host->req); 617d96be879SSascha Hauer return; 618d96be879SSascha Hauer } 619d96be879SSascha Hauer } else { 620d96be879SSascha Hauer mxcmci_finish_request(host, host->req); 621d96be879SSascha Hauer } 622d96be879SSascha Hauer } 623d96be879SSascha Hauer 624d96be879SSascha Hauer static void mxcmci_data_done(struct mxcmci_host *host, unsigned int stat) 625d96be879SSascha Hauer { 626d96be879SSascha Hauer struct mmc_data *data = host->data; 627d96be879SSascha Hauer int data_error; 628d96be879SSascha Hauer 629d96be879SSascha Hauer if (!data) 630d96be879SSascha Hauer return; 631d96be879SSascha Hauer 632d96be879SSascha Hauer data_error = mxcmci_finish_data(host, stat); 633d96be879SSascha Hauer 634d96be879SSascha Hauer mxcmci_read_response(host, stat); 635d96be879SSascha Hauer host->cmd = NULL; 636d96be879SSascha Hauer 637d96be879SSascha Hauer if (host->req->stop) { 638d96be879SSascha Hauer if (mxcmci_start_cmd(host, host->req->stop, 0)) { 639d96be879SSascha Hauer mxcmci_finish_request(host, host->req); 640d96be879SSascha Hauer return; 641d96be879SSascha Hauer } 642d96be879SSascha Hauer } else { 643d96be879SSascha Hauer mxcmci_finish_request(host, host->req); 644d96be879SSascha Hauer } 645d96be879SSascha Hauer } 646d96be879SSascha Hauer 647d96be879SSascha Hauer static void mxcmci_cmd_done(struct mxcmci_host *host, unsigned int stat) 648d96be879SSascha Hauer { 649d96be879SSascha Hauer mxcmci_read_response(host, stat); 650d96be879SSascha Hauer host->cmd = NULL; 651d96be879SSascha Hauer 652d96be879SSascha Hauer if (!host->data && host->req) { 653d96be879SSascha Hauer mxcmci_finish_request(host, host->req); 654d96be879SSascha Hauer return; 655d96be879SSascha Hauer } 656d96be879SSascha Hauer 657d96be879SSascha Hauer /* For the DMA case the DMA engine handles the data transfer 658fd589a8fSAnand Gadiyar * automatically. For non DMA we have to do it ourselves. 659d96be879SSascha Hauer * Don't do it in interrupt context though. 660d96be879SSascha Hauer */ 661d96be879SSascha Hauer if (!mxcmci_use_dma(host) && host->data) 662d96be879SSascha Hauer schedule_work(&host->datawork); 663d96be879SSascha Hauer 664d96be879SSascha Hauer } 665d96be879SSascha Hauer 666d96be879SSascha Hauer static irqreturn_t mxcmci_irq(int irq, void *devid) 667d96be879SSascha Hauer { 668d96be879SSascha Hauer struct mxcmci_host *host = devid; 669f441b993SDaniel Mack unsigned long flags; 670f441b993SDaniel Mack bool sdio_irq; 671d96be879SSascha Hauer u32 stat; 672d96be879SSascha Hauer 673d96be879SSascha Hauer stat = readl(host->base + MMC_REG_STATUS); 6744a31f2efSDaniel Mack writel(stat & ~(STATUS_SDIO_INT_ACTIVE | STATUS_DATA_TRANS_DONE | 6754a31f2efSDaniel Mack STATUS_WRITE_OP_DONE), host->base + MMC_REG_STATUS); 676d96be879SSascha Hauer 677d96be879SSascha Hauer dev_dbg(mmc_dev(host->mmc), "%s: 0x%08x\n", __func__, stat); 678d96be879SSascha Hauer 679f441b993SDaniel Mack spin_lock_irqsave(&host->lock, flags); 680f441b993SDaniel Mack sdio_irq = (stat & STATUS_SDIO_INT_ACTIVE) && host->use_sdio; 681f441b993SDaniel Mack spin_unlock_irqrestore(&host->lock, flags); 682f441b993SDaniel Mack 6834a31f2efSDaniel Mack if (mxcmci_use_dma(host) && 6844a31f2efSDaniel Mack (stat & (STATUS_READ_OP_DONE | STATUS_WRITE_OP_DONE))) 6854a31f2efSDaniel Mack writel(STATUS_READ_OP_DONE | STATUS_WRITE_OP_DONE, 6864a31f2efSDaniel Mack host->base + MMC_REG_STATUS); 6874a31f2efSDaniel Mack 688f441b993SDaniel Mack if (sdio_irq) { 689f441b993SDaniel Mack writel(STATUS_SDIO_INT_ACTIVE, host->base + MMC_REG_STATUS); 690f441b993SDaniel Mack mmc_signal_sdio_irq(host->mmc); 691f441b993SDaniel Mack } 692f441b993SDaniel Mack 693d96be879SSascha Hauer if (stat & STATUS_END_CMD_RESP) 694d96be879SSascha Hauer mxcmci_cmd_done(host, stat); 695f441b993SDaniel Mack 696d96be879SSascha Hauer if (mxcmci_use_dma(host) && 697f6ad0a48SJavier Martin (stat & (STATUS_DATA_TRANS_DONE | STATUS_WRITE_OP_DONE))) { 698f6ad0a48SJavier Martin del_timer(&host->watchdog); 699d96be879SSascha Hauer mxcmci_data_done(host, stat); 700f6ad0a48SJavier Martin } 701f53fbde4SSascha Hauer 70216b3bf8cSEric Bénard if (host->default_irq_mask && 70316b3bf8cSEric Bénard (stat & (STATUS_CARD_INSERTION | STATUS_CARD_REMOVAL))) 70416b3bf8cSEric Bénard mmc_detect_change(host->mmc, msecs_to_jiffies(200)); 705f53fbde4SSascha Hauer 706d96be879SSascha Hauer return IRQ_HANDLED; 707d96be879SSascha Hauer } 708d96be879SSascha Hauer 709d96be879SSascha Hauer static void mxcmci_request(struct mmc_host *mmc, struct mmc_request *req) 710d96be879SSascha Hauer { 711d96be879SSascha Hauer struct mxcmci_host *host = mmc_priv(mmc); 712d96be879SSascha Hauer unsigned int cmdat = host->cmdat; 713656217d2SMartin Fuzzey int error; 714d96be879SSascha Hauer 715d96be879SSascha Hauer WARN_ON(host->req != NULL); 716d96be879SSascha Hauer 717d96be879SSascha Hauer host->req = req; 718d96be879SSascha Hauer host->cmdat &= ~CMD_DAT_CONT_INIT; 719f53fbde4SSascha Hauer 720f53fbde4SSascha Hauer if (host->dma) 721d96be879SSascha Hauer host->do_dma = 1; 722f53fbde4SSascha Hauer 723d96be879SSascha Hauer if (req->data) { 724656217d2SMartin Fuzzey error = mxcmci_setup_data(host, req->data); 725656217d2SMartin Fuzzey if (error) { 726656217d2SMartin Fuzzey req->cmd->error = error; 727656217d2SMartin Fuzzey goto out; 728656217d2SMartin Fuzzey } 729656217d2SMartin Fuzzey 730d96be879SSascha Hauer 731d96be879SSascha Hauer cmdat |= CMD_DAT_CONT_DATA_ENABLE; 732d96be879SSascha Hauer 733d96be879SSascha Hauer if (req->data->flags & MMC_DATA_WRITE) 734d96be879SSascha Hauer cmdat |= CMD_DAT_CONT_WRITE; 735d96be879SSascha Hauer } 736d96be879SSascha Hauer 737656217d2SMartin Fuzzey error = mxcmci_start_cmd(host, req->cmd, cmdat); 738f53fbde4SSascha Hauer 739656217d2SMartin Fuzzey out: 740656217d2SMartin Fuzzey if (error) 741d96be879SSascha Hauer mxcmci_finish_request(host, req); 742d96be879SSascha Hauer } 743d96be879SSascha Hauer 744d96be879SSascha Hauer static void mxcmci_set_clk_rate(struct mxcmci_host *host, unsigned int clk_ios) 745d96be879SSascha Hauer { 746d96be879SSascha Hauer unsigned int divider; 747d96be879SSascha Hauer int prescaler = 0; 748529aa29eSSascha Hauer unsigned int clk_in = clk_get_rate(host->clk_per); 749d96be879SSascha Hauer 750d96be879SSascha Hauer while (prescaler <= 0x800) { 751d96be879SSascha Hauer for (divider = 1; divider <= 0xF; divider++) { 752d96be879SSascha Hauer int x; 753d96be879SSascha Hauer 754d96be879SSascha Hauer x = (clk_in / (divider + 1)); 755d96be879SSascha Hauer 756d96be879SSascha Hauer if (prescaler) 757d96be879SSascha Hauer x /= (prescaler * 2); 758d96be879SSascha Hauer 759d96be879SSascha Hauer if (x <= clk_ios) 760d96be879SSascha Hauer break; 761d96be879SSascha Hauer } 762d96be879SSascha Hauer if (divider < 0x10) 763d96be879SSascha Hauer break; 764d96be879SSascha Hauer 765d96be879SSascha Hauer if (prescaler == 0) 766d96be879SSascha Hauer prescaler = 1; 767d96be879SSascha Hauer else 768d96be879SSascha Hauer prescaler <<= 1; 769d96be879SSascha Hauer } 770d96be879SSascha Hauer 771d96be879SSascha Hauer writew((prescaler << 4) | divider, host->base + MMC_REG_CLK_RATE); 772d96be879SSascha Hauer 773d96be879SSascha Hauer dev_dbg(mmc_dev(host->mmc), "scaler: %d divider: %d in: %d out: %d\n", 774d96be879SSascha Hauer prescaler, divider, clk_in, clk_ios); 775d96be879SSascha Hauer } 776d96be879SSascha Hauer 777f53fbde4SSascha Hauer static int mxcmci_setup_dma(struct mmc_host *mmc) 778f53fbde4SSascha Hauer { 779f53fbde4SSascha Hauer struct mxcmci_host *host = mmc_priv(mmc); 780f53fbde4SSascha Hauer struct dma_slave_config *config = &host->dma_slave_config; 781f53fbde4SSascha Hauer 782f53fbde4SSascha Hauer config->dst_addr = host->res->start + MMC_REG_BUFFER_ACCESS; 783f53fbde4SSascha Hauer config->src_addr = host->res->start + MMC_REG_BUFFER_ACCESS; 784f53fbde4SSascha Hauer config->dst_addr_width = 4; 785f53fbde4SSascha Hauer config->src_addr_width = 4; 786f53fbde4SSascha Hauer config->dst_maxburst = host->burstlen; 787f53fbde4SSascha Hauer config->src_maxburst = host->burstlen; 788258aea76SViresh Kumar config->device_fc = false; 789f53fbde4SSascha Hauer 790f53fbde4SSascha Hauer return dmaengine_slave_config(host->dma, config); 791f53fbde4SSascha Hauer } 792f53fbde4SSascha Hauer 793d96be879SSascha Hauer static void mxcmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) 794d96be879SSascha Hauer { 795d96be879SSascha Hauer struct mxcmci_host *host = mmc_priv(mmc); 796f53fbde4SSascha Hauer int burstlen, ret; 797f53fbde4SSascha Hauer 798d96be879SSascha Hauer /* 7996584cb88SSascha Hauer * use burstlen of 64 (16 words) in 4 bit mode (--> reg value 0) 8006584cb88SSascha Hauer * use burstlen of 16 (4 words) in 1 bit mode (--> reg value 16) 801d96be879SSascha Hauer */ 802d96be879SSascha Hauer if (ios->bus_width == MMC_BUS_WIDTH_4) 803f53fbde4SSascha Hauer burstlen = 16; 8046584cb88SSascha Hauer else 8056584cb88SSascha Hauer burstlen = 4; 806d96be879SSascha Hauer 807f53fbde4SSascha Hauer if (mxcmci_use_dma(host) && burstlen != host->burstlen) { 808f53fbde4SSascha Hauer host->burstlen = burstlen; 809f53fbde4SSascha Hauer ret = mxcmci_setup_dma(mmc); 810f53fbde4SSascha Hauer if (ret) { 811f53fbde4SSascha Hauer dev_err(mmc_dev(host->mmc), 812f53fbde4SSascha Hauer "failed to config DMA channel. Falling back to PIO\n"); 813f53fbde4SSascha Hauer dma_release_channel(host->dma); 814f53fbde4SSascha Hauer host->do_dma = 0; 815e58f516fSSascha Hauer host->dma = NULL; 816f53fbde4SSascha Hauer } 817f53fbde4SSascha Hauer } 818f53fbde4SSascha Hauer 819d96be879SSascha Hauer if (ios->bus_width == MMC_BUS_WIDTH_4) 820d96be879SSascha Hauer host->cmdat |= CMD_DAT_CONT_BUS_WIDTH_4; 821d96be879SSascha Hauer else 822d96be879SSascha Hauer host->cmdat &= ~CMD_DAT_CONT_BUS_WIDTH_4; 823d96be879SSascha Hauer 824d96be879SSascha Hauer if (host->power_mode != ios->power_mode) { 825d078d242SAlberto Panizzo mxcmci_set_power(host, ios->power_mode, ios->vdd); 826d96be879SSascha Hauer host->power_mode = ios->power_mode; 82774b66954SAlberto Panizzo 828d96be879SSascha Hauer if (ios->power_mode == MMC_POWER_ON) 829d96be879SSascha Hauer host->cmdat |= CMD_DAT_CONT_INIT; 830d96be879SSascha Hauer } 831d96be879SSascha Hauer 832d96be879SSascha Hauer if (ios->clock) { 833d96be879SSascha Hauer mxcmci_set_clk_rate(host, ios->clock); 834d96be879SSascha Hauer writew(STR_STP_CLK_START_CLK, host->base + MMC_REG_STR_STP_CLK); 835d96be879SSascha Hauer } else { 836d96be879SSascha Hauer writew(STR_STP_CLK_STOP_CLK, host->base + MMC_REG_STR_STP_CLK); 837d96be879SSascha Hauer } 838d96be879SSascha Hauer 839d96be879SSascha Hauer host->clock = ios->clock; 840d96be879SSascha Hauer } 841d96be879SSascha Hauer 842d96be879SSascha Hauer static irqreturn_t mxcmci_detect_irq(int irq, void *data) 843d96be879SSascha Hauer { 844d96be879SSascha Hauer struct mmc_host *mmc = data; 845d96be879SSascha Hauer 846d96be879SSascha Hauer dev_dbg(mmc_dev(mmc), "%s\n", __func__); 847d96be879SSascha Hauer 848d96be879SSascha Hauer mmc_detect_change(mmc, msecs_to_jiffies(250)); 849d96be879SSascha Hauer return IRQ_HANDLED; 850d96be879SSascha Hauer } 851d96be879SSascha Hauer 852d96be879SSascha Hauer static int mxcmci_get_ro(struct mmc_host *mmc) 853d96be879SSascha Hauer { 854d96be879SSascha Hauer struct mxcmci_host *host = mmc_priv(mmc); 855d96be879SSascha Hauer 856d96be879SSascha Hauer if (host->pdata && host->pdata->get_ro) 857d96be879SSascha Hauer return !!host->pdata->get_ro(mmc_dev(mmc)); 858d96be879SSascha Hauer /* 859d96be879SSascha Hauer * Board doesn't support read only detection; let the mmc core 860d96be879SSascha Hauer * decide what to do. 861d96be879SSascha Hauer */ 862d96be879SSascha Hauer return -ENOSYS; 863d96be879SSascha Hauer } 864d96be879SSascha Hauer 865f441b993SDaniel Mack static void mxcmci_enable_sdio_irq(struct mmc_host *mmc, int enable) 866f441b993SDaniel Mack { 867f441b993SDaniel Mack struct mxcmci_host *host = mmc_priv(mmc); 868f441b993SDaniel Mack unsigned long flags; 869f441b993SDaniel Mack u32 int_cntr; 870f441b993SDaniel Mack 871f441b993SDaniel Mack spin_lock_irqsave(&host->lock, flags); 872f441b993SDaniel Mack host->use_sdio = enable; 873f441b993SDaniel Mack int_cntr = readl(host->base + MMC_REG_INT_CNTR); 874f441b993SDaniel Mack 875f441b993SDaniel Mack if (enable) 876f441b993SDaniel Mack int_cntr |= INT_SDIO_IRQ_EN; 877f441b993SDaniel Mack else 878f441b993SDaniel Mack int_cntr &= ~INT_SDIO_IRQ_EN; 879f441b993SDaniel Mack 880f441b993SDaniel Mack writel(int_cntr, host->base + MMC_REG_INT_CNTR); 881f441b993SDaniel Mack spin_unlock_irqrestore(&host->lock, flags); 882f441b993SDaniel Mack } 883d96be879SSascha Hauer 8843fcb027dSDaniel Mack static void mxcmci_init_card(struct mmc_host *host, struct mmc_card *card) 8853fcb027dSDaniel Mack { 8867f917a8dSShawn Guo struct mxcmci_host *mxcmci = mmc_priv(host); 8877f917a8dSShawn Guo 8883fcb027dSDaniel Mack /* 8893fcb027dSDaniel Mack * MX3 SoCs have a silicon bug which corrupts CRC calculation of 8903fcb027dSDaniel Mack * multi-block transfers when connected SDIO peripheral doesn't 8913fcb027dSDaniel Mack * drive the BUSY line as required by the specs. 8923fcb027dSDaniel Mack * One way to prevent this is to only allow 1-bit transfers. 8933fcb027dSDaniel Mack */ 8943fcb027dSDaniel Mack 8957f917a8dSShawn Guo if (is_imx31_mmc(mxcmci) && card->type == MMC_TYPE_SDIO) 8963fcb027dSDaniel Mack host->caps &= ~MMC_CAP_4_BIT_DATA; 8973fcb027dSDaniel Mack else 8983fcb027dSDaniel Mack host->caps |= MMC_CAP_4_BIT_DATA; 8993fcb027dSDaniel Mack } 9003fcb027dSDaniel Mack 901f53fbde4SSascha Hauer static bool filter(struct dma_chan *chan, void *param) 902f53fbde4SSascha Hauer { 903f53fbde4SSascha Hauer struct mxcmci_host *host = param; 904f53fbde4SSascha Hauer 905f53fbde4SSascha Hauer if (!imx_dma_is_general_purpose(chan)) 906f53fbde4SSascha Hauer return false; 907f53fbde4SSascha Hauer 908f53fbde4SSascha Hauer chan->private = &host->dma_data; 909f53fbde4SSascha Hauer 910f53fbde4SSascha Hauer return true; 911f53fbde4SSascha Hauer } 912f53fbde4SSascha Hauer 913f6ad0a48SJavier Martin static void mxcmci_watchdog(unsigned long data) 914f6ad0a48SJavier Martin { 915f6ad0a48SJavier Martin struct mmc_host *mmc = (struct mmc_host *)data; 916f6ad0a48SJavier Martin struct mxcmci_host *host = mmc_priv(mmc); 917f6ad0a48SJavier Martin struct mmc_request *req = host->req; 918f6ad0a48SJavier Martin unsigned int stat = readl(host->base + MMC_REG_STATUS); 919f6ad0a48SJavier Martin 920f6ad0a48SJavier Martin if (host->dma_dir == DMA_FROM_DEVICE) { 921f6ad0a48SJavier Martin dmaengine_terminate_all(host->dma); 922f6ad0a48SJavier Martin dev_err(mmc_dev(host->mmc), 923f6ad0a48SJavier Martin "%s: read time out (status = 0x%08x)\n", 924f6ad0a48SJavier Martin __func__, stat); 925f6ad0a48SJavier Martin } else { 926f6ad0a48SJavier Martin dev_err(mmc_dev(host->mmc), 927f6ad0a48SJavier Martin "%s: write time out (status = 0x%08x)\n", 928f6ad0a48SJavier Martin __func__, stat); 929f6ad0a48SJavier Martin mxcmci_softreset(host); 930f6ad0a48SJavier Martin } 931f6ad0a48SJavier Martin 932f6ad0a48SJavier Martin /* Mark transfer as erroneus and inform the upper layers */ 933f6ad0a48SJavier Martin 934f6ad0a48SJavier Martin host->data->error = -ETIMEDOUT; 935f6ad0a48SJavier Martin host->req = NULL; 936f6ad0a48SJavier Martin host->cmd = NULL; 937f6ad0a48SJavier Martin host->data = NULL; 938f6ad0a48SJavier Martin mmc_request_done(host->mmc, req); 939f6ad0a48SJavier Martin } 940f6ad0a48SJavier Martin 941d96be879SSascha Hauer static const struct mmc_host_ops mxcmci_ops = { 942d96be879SSascha Hauer .request = mxcmci_request, 943d96be879SSascha Hauer .set_ios = mxcmci_set_ios, 944d96be879SSascha Hauer .get_ro = mxcmci_get_ro, 945f441b993SDaniel Mack .enable_sdio_irq = mxcmci_enable_sdio_irq, 9463fcb027dSDaniel Mack .init_card = mxcmci_init_card, 947d96be879SSascha Hauer }; 948d96be879SSascha Hauer 949d96be879SSascha Hauer static int mxcmci_probe(struct platform_device *pdev) 950d96be879SSascha Hauer { 951d96be879SSascha Hauer struct mmc_host *mmc; 952d96be879SSascha Hauer struct mxcmci_host *host = NULL; 953c0521bafSUwe Kleine-König struct resource *iores, *r; 954d96be879SSascha Hauer int ret = 0, irq; 9557ff747c4SMarkus Pargmann bool dat3_card_detect = false; 956f53fbde4SSascha Hauer dma_cap_mask_t mask; 9577ff747c4SMarkus Pargmann const struct of_device_id *of_id; 9587ff747c4SMarkus Pargmann struct imxmmc_platform_data *pdata = pdev->dev.platform_data; 959d96be879SSascha Hauer 960a3c76eb9SGirish K S pr_info("i.MX SDHC driver\n"); 961d96be879SSascha Hauer 9627ff747c4SMarkus Pargmann of_id = of_match_device(mxcmci_of_match, &pdev->dev); 9637ff747c4SMarkus Pargmann 964c0521bafSUwe Kleine-König iores = platform_get_resource(pdev, IORESOURCE_MEM, 0); 965d96be879SSascha Hauer irq = platform_get_irq(pdev, 0); 966c0521bafSUwe Kleine-König if (!iores || irq < 0) 967d96be879SSascha Hauer return -EINVAL; 968d96be879SSascha Hauer 969c0521bafSUwe Kleine-König r = request_mem_region(iores->start, resource_size(iores), pdev->name); 970d96be879SSascha Hauer if (!r) 971d96be879SSascha Hauer return -EBUSY; 972d96be879SSascha Hauer 973d96be879SSascha Hauer mmc = mmc_alloc_host(sizeof(struct mxcmci_host), &pdev->dev); 974d96be879SSascha Hauer if (!mmc) { 975d96be879SSascha Hauer ret = -ENOMEM; 976d96be879SSascha Hauer goto out_release_mem; 977d96be879SSascha Hauer } 978d96be879SSascha Hauer 9797ff747c4SMarkus Pargmann mmc_of_parse(mmc); 980d96be879SSascha Hauer mmc->ops = &mxcmci_ops; 9817ff747c4SMarkus Pargmann 9827ff747c4SMarkus Pargmann /* For devicetree parsing, the bus width is read from devicetree */ 9837ff747c4SMarkus Pargmann if (pdata) 984f441b993SDaniel Mack mmc->caps = MMC_CAP_4_BIT_DATA | MMC_CAP_SDIO_IRQ; 9857ff747c4SMarkus Pargmann else 9867ff747c4SMarkus Pargmann mmc->caps |= MMC_CAP_SDIO_IRQ; 987d96be879SSascha Hauer 988d96be879SSascha Hauer /* MMC core transfer sizes tunable parameters */ 989a36274e0SMartin K. Petersen mmc->max_segs = 64; 990d96be879SSascha Hauer mmc->max_blk_size = 2048; 991d96be879SSascha Hauer mmc->max_blk_count = 65535; 992d96be879SSascha Hauer mmc->max_req_size = mmc->max_blk_size * mmc->max_blk_count; 993d759c374SVladimir Zapolskiy mmc->max_seg_size = mmc->max_req_size; 994d96be879SSascha Hauer 995d96be879SSascha Hauer host = mmc_priv(mmc); 996d96be879SSascha Hauer host->base = ioremap(r->start, resource_size(r)); 997d96be879SSascha Hauer if (!host->base) { 998d96be879SSascha Hauer ret = -ENOMEM; 999d96be879SSascha Hauer goto out_free; 1000d96be879SSascha Hauer } 1001d96be879SSascha Hauer 10027ff747c4SMarkus Pargmann if (of_id) { 10037ff747c4SMarkus Pargmann const struct platform_device_id *id_entry = of_id->data; 10047ff747c4SMarkus Pargmann host->devtype = id_entry->driver_data; 10057ff747c4SMarkus Pargmann } else { 10067f917a8dSShawn Guo host->devtype = pdev->id_entry->driver_data; 10077ff747c4SMarkus Pargmann } 10087ff747c4SMarkus Pargmann host->mmc = mmc; 10097ff747c4SMarkus Pargmann host->pdata = pdata; 1010f441b993SDaniel Mack spin_lock_init(&host->lock); 1011d96be879SSascha Hauer 10127ff747c4SMarkus Pargmann if (pdata) 10137ff747c4SMarkus Pargmann dat3_card_detect = pdata->dat3_card_detect; 10147ff747c4SMarkus Pargmann else if (!(mmc->caps & MMC_CAP_NONREMOVABLE) 10157ff747c4SMarkus Pargmann && !of_property_read_bool(pdev->dev.of_node, "cd-gpios")) 10167ff747c4SMarkus Pargmann dat3_card_detect = true; 10177ff747c4SMarkus Pargmann 101874b66954SAlberto Panizzo mxcmci_init_ocr(host); 1019d96be879SSascha Hauer 10207ff747c4SMarkus Pargmann if (dat3_card_detect) 102116b3bf8cSEric Bénard host->default_irq_mask = 102216b3bf8cSEric Bénard INT_CARD_INSERTION_EN | INT_CARD_REMOVAL_EN; 102316b3bf8cSEric Bénard else 102416b3bf8cSEric Bénard host->default_irq_mask = 0; 102516b3bf8cSEric Bénard 1026d96be879SSascha Hauer host->res = r; 1027d96be879SSascha Hauer host->irq = irq; 1028d96be879SSascha Hauer 1029529aa29eSSascha Hauer host->clk_ipg = devm_clk_get(&pdev->dev, "ipg"); 1030529aa29eSSascha Hauer if (IS_ERR(host->clk_ipg)) { 1031529aa29eSSascha Hauer ret = PTR_ERR(host->clk_ipg); 1032d96be879SSascha Hauer goto out_iounmap; 1033d96be879SSascha Hauer } 1034529aa29eSSascha Hauer 1035529aa29eSSascha Hauer host->clk_per = devm_clk_get(&pdev->dev, "per"); 1036529aa29eSSascha Hauer if (IS_ERR(host->clk_per)) { 1037529aa29eSSascha Hauer ret = PTR_ERR(host->clk_per); 1038529aa29eSSascha Hauer goto out_iounmap; 1039529aa29eSSascha Hauer } 1040529aa29eSSascha Hauer 1041529aa29eSSascha Hauer clk_prepare_enable(host->clk_per); 1042529aa29eSSascha Hauer clk_prepare_enable(host->clk_ipg); 1043d96be879SSascha Hauer 1044d96be879SSascha Hauer mxcmci_softreset(host); 1045d96be879SSascha Hauer 1046d96be879SSascha Hauer host->rev_no = readw(host->base + MMC_REG_REV_NO); 1047d96be879SSascha Hauer if (host->rev_no != 0x400) { 1048d96be879SSascha Hauer ret = -ENODEV; 1049d96be879SSascha Hauer dev_err(mmc_dev(host->mmc), "wrong rev.no. 0x%08x. aborting.\n", 1050d96be879SSascha Hauer host->rev_no); 1051d96be879SSascha Hauer goto out_clk_put; 1052d96be879SSascha Hauer } 1053d96be879SSascha Hauer 1054529aa29eSSascha Hauer mmc->f_min = clk_get_rate(host->clk_per) >> 16; 1055529aa29eSSascha Hauer mmc->f_max = clk_get_rate(host->clk_per) >> 1; 1056d96be879SSascha Hauer 1057d96be879SSascha Hauer /* recommended in data sheet */ 1058d96be879SSascha Hauer writew(0x2db4, host->base + MMC_REG_READ_TO); 1059d96be879SSascha Hauer 106016b3bf8cSEric Bénard writel(host->default_irq_mask, host->base + MMC_REG_INT_CNTR); 1061d96be879SSascha Hauer 10627ff747c4SMarkus Pargmann if (!host->pdata) { 10637ff747c4SMarkus Pargmann host->dma = dma_request_slave_channel(&pdev->dev, "rx-tx"); 10647ff747c4SMarkus Pargmann } else { 1065d96be879SSascha Hauer r = platform_get_resource(pdev, IORESOURCE_DMA, 0); 1066f53fbde4SSascha Hauer if (r) { 1067f53fbde4SSascha Hauer host->dmareq = r->start; 1068f53fbde4SSascha Hauer host->dma_data.peripheral_type = IMX_DMATYPE_SDHC; 1069f53fbde4SSascha Hauer host->dma_data.priority = DMA_PRIO_LOW; 1070f53fbde4SSascha Hauer host->dma_data.dma_request = host->dmareq; 1071f53fbde4SSascha Hauer dma_cap_zero(mask); 1072f53fbde4SSascha Hauer dma_cap_set(DMA_SLAVE, mask); 1073f53fbde4SSascha Hauer host->dma = dma_request_channel(mask, filter, host); 10747ff747c4SMarkus Pargmann } 10757ff747c4SMarkus Pargmann } 1076f53fbde4SSascha Hauer if (host->dma) 1077f53fbde4SSascha Hauer mmc->max_seg_size = dma_get_max_seg_size( 1078f53fbde4SSascha Hauer host->dma->device->dev); 10797ff747c4SMarkus Pargmann else 1080f53fbde4SSascha Hauer dev_info(mmc_dev(host->mmc), "dma not available. Using PIO\n"); 1081f53fbde4SSascha Hauer 1082d96be879SSascha Hauer INIT_WORK(&host->datawork, mxcmci_datawork); 1083d96be879SSascha Hauer 1084d96be879SSascha Hauer ret = request_irq(host->irq, mxcmci_irq, 0, DRIVER_NAME, host); 1085d96be879SSascha Hauer if (ret) 1086d96be879SSascha Hauer goto out_free_dma; 1087d96be879SSascha Hauer 1088d96be879SSascha Hauer platform_set_drvdata(pdev, mmc); 1089d96be879SSascha Hauer 1090d96be879SSascha Hauer if (host->pdata && host->pdata->init) { 1091d96be879SSascha Hauer ret = host->pdata->init(&pdev->dev, mxcmci_detect_irq, 1092d96be879SSascha Hauer host->mmc); 1093d96be879SSascha Hauer if (ret) 1094d96be879SSascha Hauer goto out_free_irq; 1095d96be879SSascha Hauer } 1096d96be879SSascha Hauer 1097f6ad0a48SJavier Martin init_timer(&host->watchdog); 1098f6ad0a48SJavier Martin host->watchdog.function = &mxcmci_watchdog; 1099f6ad0a48SJavier Martin host->watchdog.data = (unsigned long)mmc; 1100f6ad0a48SJavier Martin 1101abd4190fSAlexander Shiyan mmc_add_host(mmc); 1102abd4190fSAlexander Shiyan 1103d96be879SSascha Hauer return 0; 1104d96be879SSascha Hauer 1105d96be879SSascha Hauer out_free_irq: 1106d96be879SSascha Hauer free_irq(host->irq, host); 1107d96be879SSascha Hauer out_free_dma: 1108f53fbde4SSascha Hauer if (host->dma) 1109f53fbde4SSascha Hauer dma_release_channel(host->dma); 1110d96be879SSascha Hauer out_clk_put: 1111529aa29eSSascha Hauer clk_disable_unprepare(host->clk_per); 1112529aa29eSSascha Hauer clk_disable_unprepare(host->clk_ipg); 1113d96be879SSascha Hauer out_iounmap: 1114d96be879SSascha Hauer iounmap(host->base); 1115d96be879SSascha Hauer out_free: 1116d96be879SSascha Hauer mmc_free_host(mmc); 1117d96be879SSascha Hauer out_release_mem: 1118c0521bafSUwe Kleine-König release_mem_region(iores->start, resource_size(iores)); 1119d96be879SSascha Hauer return ret; 1120d96be879SSascha Hauer } 1121d96be879SSascha Hauer 1122d96be879SSascha Hauer static int mxcmci_remove(struct platform_device *pdev) 1123d96be879SSascha Hauer { 1124d96be879SSascha Hauer struct mmc_host *mmc = platform_get_drvdata(pdev); 1125d96be879SSascha Hauer struct mxcmci_host *host = mmc_priv(mmc); 1126d96be879SSascha Hauer 1127d96be879SSascha Hauer platform_set_drvdata(pdev, NULL); 1128d96be879SSascha Hauer 1129d96be879SSascha Hauer mmc_remove_host(mmc); 1130d96be879SSascha Hauer 113174b66954SAlberto Panizzo if (host->vcc) 113274b66954SAlberto Panizzo regulator_put(host->vcc); 113374b66954SAlberto Panizzo 1134d96be879SSascha Hauer if (host->pdata && host->pdata->exit) 1135d96be879SSascha Hauer host->pdata->exit(&pdev->dev, mmc); 1136d96be879SSascha Hauer 1137d96be879SSascha Hauer free_irq(host->irq, host); 1138d96be879SSascha Hauer iounmap(host->base); 1139f53fbde4SSascha Hauer 1140f53fbde4SSascha Hauer if (host->dma) 1141f53fbde4SSascha Hauer dma_release_channel(host->dma); 1142f53fbde4SSascha Hauer 1143529aa29eSSascha Hauer clk_disable_unprepare(host->clk_per); 1144529aa29eSSascha Hauer clk_disable_unprepare(host->clk_ipg); 1145d96be879SSascha Hauer 1146d96be879SSascha Hauer release_mem_region(host->res->start, resource_size(host->res)); 1147d96be879SSascha Hauer 1148d96be879SSascha Hauer mmc_free_host(mmc); 1149d96be879SSascha Hauer 1150d96be879SSascha Hauer return 0; 1151d96be879SSascha Hauer } 1152d96be879SSascha Hauer 1153d96be879SSascha Hauer #ifdef CONFIG_PM 1154a7d403cfSEric Bénard static int mxcmci_suspend(struct device *dev) 1155d96be879SSascha Hauer { 1156a7d403cfSEric Bénard struct mmc_host *mmc = dev_get_drvdata(dev); 1157a7d403cfSEric Bénard struct mxcmci_host *host = mmc_priv(mmc); 1158d96be879SSascha Hauer int ret = 0; 1159d96be879SSascha Hauer 1160d96be879SSascha Hauer if (mmc) 11611a13f8faSMatt Fleming ret = mmc_suspend_host(mmc); 1162529aa29eSSascha Hauer clk_disable_unprepare(host->clk_per); 1163529aa29eSSascha Hauer clk_disable_unprepare(host->clk_ipg); 1164d96be879SSascha Hauer 1165d96be879SSascha Hauer return ret; 1166d96be879SSascha Hauer } 1167d96be879SSascha Hauer 1168a7d403cfSEric Bénard static int mxcmci_resume(struct device *dev) 1169d96be879SSascha Hauer { 1170a7d403cfSEric Bénard struct mmc_host *mmc = dev_get_drvdata(dev); 1171a7d403cfSEric Bénard struct mxcmci_host *host = mmc_priv(mmc); 1172d96be879SSascha Hauer int ret = 0; 1173d96be879SSascha Hauer 1174529aa29eSSascha Hauer clk_prepare_enable(host->clk_per); 1175529aa29eSSascha Hauer clk_prepare_enable(host->clk_ipg); 1176a7d403cfSEric Bénard if (mmc) 1177d96be879SSascha Hauer ret = mmc_resume_host(mmc); 1178d96be879SSascha Hauer 1179d96be879SSascha Hauer return ret; 1180d96be879SSascha Hauer } 1181a7d403cfSEric Bénard 1182a7d403cfSEric Bénard static const struct dev_pm_ops mxcmci_pm_ops = { 1183a7d403cfSEric Bénard .suspend = mxcmci_suspend, 1184a7d403cfSEric Bénard .resume = mxcmci_resume, 1185a7d403cfSEric Bénard }; 1186a7d403cfSEric Bénard #endif 1187d96be879SSascha Hauer 1188d96be879SSascha Hauer static struct platform_driver mxcmci_driver = { 1189d96be879SSascha Hauer .probe = mxcmci_probe, 1190d96be879SSascha Hauer .remove = mxcmci_remove, 11917f917a8dSShawn Guo .id_table = mxcmci_devtype, 1192d96be879SSascha Hauer .driver = { 1193d96be879SSascha Hauer .name = DRIVER_NAME, 1194d96be879SSascha Hauer .owner = THIS_MODULE, 1195a7d403cfSEric Bénard #ifdef CONFIG_PM 1196a7d403cfSEric Bénard .pm = &mxcmci_pm_ops, 1197a7d403cfSEric Bénard #endif 11987ff747c4SMarkus Pargmann .of_match_table = mxcmci_of_match, 1199d96be879SSascha Hauer } 1200d96be879SSascha Hauer }; 1201d96be879SSascha Hauer 1202d1f81a64SAxel Lin module_platform_driver(mxcmci_driver); 1203d96be879SSascha Hauer 1204d96be879SSascha Hauer MODULE_DESCRIPTION("i.MX Multimedia Card Interface Driver"); 1205d96be879SSascha Hauer MODULE_AUTHOR("Sascha Hauer, Pengutronix"); 1206d96be879SSascha Hauer MODULE_LICENSE("GPL"); 12076eb30adfSFabio Estevam MODULE_ALIAS("platform:mxc-mmc"); 1208