1d2912cb1SThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only 2d96be879SSascha Hauer /* 3d96be879SSascha Hauer * linux/drivers/mmc/host/mxcmmc.c - Freescale i.MX MMCI driver 4d96be879SSascha Hauer * 5d96be879SSascha Hauer * This is a driver for the SDHC controller found in Freescale MX2/MX3 6d96be879SSascha Hauer * SoCs. It is basically the same hardware as found on MX1 (imxmmc.c). 7d96be879SSascha Hauer * Unlike the hardware found on MX1, this hardware just works and does 83ad2f3fbSDaniel Mack * not need all the quirks found in imxmmc.c, hence the separate driver. 9d96be879SSascha Hauer * 10d96be879SSascha Hauer * Copyright (C) 2008 Sascha Hauer, Pengutronix <s.hauer@pengutronix.de> 11d96be879SSascha Hauer * Copyright (C) 2006 Pavel Pisa, PiKRON <ppisa@pikron.com> 12d96be879SSascha Hauer * 13d96be879SSascha Hauer * derived from pxamci.c by Russell King 14d96be879SSascha Hauer */ 15d96be879SSascha Hauer 16d96be879SSascha Hauer #include <linux/module.h> 17d96be879SSascha Hauer #include <linux/init.h> 18d96be879SSascha Hauer #include <linux/ioport.h> 19d96be879SSascha Hauer #include <linux/platform_device.h> 20a639bb72SArnd Bergmann #include <linux/highmem.h> 21d96be879SSascha Hauer #include <linux/interrupt.h> 22d96be879SSascha Hauer #include <linux/irq.h> 23d96be879SSascha Hauer #include <linux/blkdev.h> 24d96be879SSascha Hauer #include <linux/dma-mapping.h> 25d96be879SSascha Hauer #include <linux/mmc/host.h> 26d96be879SSascha Hauer #include <linux/mmc/card.h> 27d96be879SSascha Hauer #include <linux/delay.h> 28d96be879SSascha Hauer #include <linux/clk.h> 29d96be879SSascha Hauer #include <linux/io.h> 3074b66954SAlberto Panizzo #include <linux/regulator/consumer.h> 31f53fbde4SSascha Hauer #include <linux/dmaengine.h> 32258aea76SViresh Kumar #include <linux/types.h> 337ff747c4SMarkus Pargmann #include <linux/of.h> 347ff747c4SMarkus Pargmann #include <linux/of_device.h> 357ff747c4SMarkus Pargmann #include <linux/of_dma.h> 36bcf53524SAnatolij Gustschin #include <linux/mmc/slot-gpio.h> 37d96be879SSascha Hauer 38d96be879SSascha Hauer #include <asm/dma.h> 39d96be879SSascha Hauer #include <asm/irq.h> 4082906b13SArnd Bergmann #include <linux/platform_data/mmc-mxcmmc.h> 41d96be879SSascha Hauer 4282906b13SArnd Bergmann #include <linux/platform_data/dma-imx.h> 43d96be879SSascha Hauer 449563b1dbSSascha Hauer #define DRIVER_NAME "mxc-mmc" 45f6ad0a48SJavier Martin #define MXCMCI_TIMEOUT_MS 10000 46d96be879SSascha Hauer 47d96be879SSascha Hauer #define MMC_REG_STR_STP_CLK 0x00 48d96be879SSascha Hauer #define MMC_REG_STATUS 0x04 49d96be879SSascha Hauer #define MMC_REG_CLK_RATE 0x08 50d96be879SSascha Hauer #define MMC_REG_CMD_DAT_CONT 0x0C 51d96be879SSascha Hauer #define MMC_REG_RES_TO 0x10 52d96be879SSascha Hauer #define MMC_REG_READ_TO 0x14 53d96be879SSascha Hauer #define MMC_REG_BLK_LEN 0x18 54d96be879SSascha Hauer #define MMC_REG_NOB 0x1C 55d96be879SSascha Hauer #define MMC_REG_REV_NO 0x20 56d96be879SSascha Hauer #define MMC_REG_INT_CNTR 0x24 57d96be879SSascha Hauer #define MMC_REG_CMD 0x28 58d96be879SSascha Hauer #define MMC_REG_ARG 0x2C 59d96be879SSascha Hauer #define MMC_REG_RES_FIFO 0x34 60d96be879SSascha Hauer #define MMC_REG_BUFFER_ACCESS 0x38 61d96be879SSascha Hauer 62d96be879SSascha Hauer #define STR_STP_CLK_RESET (1 << 3) 63d96be879SSascha Hauer #define STR_STP_CLK_START_CLK (1 << 1) 64d96be879SSascha Hauer #define STR_STP_CLK_STOP_CLK (1 << 0) 65d96be879SSascha Hauer 66d96be879SSascha Hauer #define STATUS_CARD_INSERTION (1 << 31) 67d96be879SSascha Hauer #define STATUS_CARD_REMOVAL (1 << 30) 68d96be879SSascha Hauer #define STATUS_YBUF_EMPTY (1 << 29) 69d96be879SSascha Hauer #define STATUS_XBUF_EMPTY (1 << 28) 70d96be879SSascha Hauer #define STATUS_YBUF_FULL (1 << 27) 71d96be879SSascha Hauer #define STATUS_XBUF_FULL (1 << 26) 72d96be879SSascha Hauer #define STATUS_BUF_UND_RUN (1 << 25) 73d96be879SSascha Hauer #define STATUS_BUF_OVFL (1 << 24) 74d96be879SSascha Hauer #define STATUS_SDIO_INT_ACTIVE (1 << 14) 75d96be879SSascha Hauer #define STATUS_END_CMD_RESP (1 << 13) 76d96be879SSascha Hauer #define STATUS_WRITE_OP_DONE (1 << 12) 77d96be879SSascha Hauer #define STATUS_DATA_TRANS_DONE (1 << 11) 78d96be879SSascha Hauer #define STATUS_READ_OP_DONE (1 << 11) 79d96be879SSascha Hauer #define STATUS_WR_CRC_ERROR_CODE_MASK (3 << 10) 80d96be879SSascha Hauer #define STATUS_CARD_BUS_CLK_RUN (1 << 8) 81d96be879SSascha Hauer #define STATUS_BUF_READ_RDY (1 << 7) 82d96be879SSascha Hauer #define STATUS_BUF_WRITE_RDY (1 << 6) 83d96be879SSascha Hauer #define STATUS_RESP_CRC_ERR (1 << 5) 84d96be879SSascha Hauer #define STATUS_CRC_READ_ERR (1 << 3) 85d96be879SSascha Hauer #define STATUS_CRC_WRITE_ERR (1 << 2) 86d96be879SSascha Hauer #define STATUS_TIME_OUT_RESP (1 << 1) 87d96be879SSascha Hauer #define STATUS_TIME_OUT_READ (1 << 0) 88d96be879SSascha Hauer #define STATUS_ERR_MASK 0x2f 89d96be879SSascha Hauer 90d96be879SSascha Hauer #define CMD_DAT_CONT_CMD_RESP_LONG_OFF (1 << 12) 91d96be879SSascha Hauer #define CMD_DAT_CONT_STOP_READWAIT (1 << 11) 92d96be879SSascha Hauer #define CMD_DAT_CONT_START_READWAIT (1 << 10) 93d96be879SSascha Hauer #define CMD_DAT_CONT_BUS_WIDTH_4 (2 << 8) 94d96be879SSascha Hauer #define CMD_DAT_CONT_INIT (1 << 7) 95d96be879SSascha Hauer #define CMD_DAT_CONT_WRITE (1 << 4) 96d96be879SSascha Hauer #define CMD_DAT_CONT_DATA_ENABLE (1 << 3) 97d96be879SSascha Hauer #define CMD_DAT_CONT_RESPONSE_48BIT_CRC (1 << 0) 98d96be879SSascha Hauer #define CMD_DAT_CONT_RESPONSE_136BIT (2 << 0) 99d96be879SSascha Hauer #define CMD_DAT_CONT_RESPONSE_48BIT (3 << 0) 100d96be879SSascha Hauer 101d96be879SSascha Hauer #define INT_SDIO_INT_WKP_EN (1 << 18) 102d96be879SSascha Hauer #define INT_CARD_INSERTION_WKP_EN (1 << 17) 103d96be879SSascha Hauer #define INT_CARD_REMOVAL_WKP_EN (1 << 16) 104d96be879SSascha Hauer #define INT_CARD_INSERTION_EN (1 << 15) 105d96be879SSascha Hauer #define INT_CARD_REMOVAL_EN (1 << 14) 106d96be879SSascha Hauer #define INT_SDIO_IRQ_EN (1 << 13) 107d96be879SSascha Hauer #define INT_DAT0_EN (1 << 12) 108d96be879SSascha Hauer #define INT_BUF_READ_EN (1 << 4) 109d96be879SSascha Hauer #define INT_BUF_WRITE_EN (1 << 3) 110d96be879SSascha Hauer #define INT_END_CMD_RES_EN (1 << 2) 111d96be879SSascha Hauer #define INT_WRITE_OP_DONE_EN (1 << 1) 112d96be879SSascha Hauer #define INT_READ_OP_EN (1 << 0) 113d96be879SSascha Hauer 1147f917a8dSShawn Guo enum mxcmci_type { 1157f917a8dSShawn Guo IMX21_MMC, 1167f917a8dSShawn Guo IMX31_MMC, 117c7ceab02SAnatolij Gustschin MPC512X_MMC, 1187f917a8dSShawn Guo }; 1197f917a8dSShawn Guo 120d96be879SSascha Hauer struct mxcmci_host { 121d96be879SSascha Hauer struct mmc_host *mmc; 122d96be879SSascha Hauer void __iomem *base; 12301e4f958SAlexander Shiyan dma_addr_t phys_base; 124d96be879SSascha Hauer int detect_irq; 125f53fbde4SSascha Hauer struct dma_chan *dma; 126f53fbde4SSascha Hauer struct dma_async_tx_descriptor *desc; 127d96be879SSascha Hauer int do_dma; 12816b3bf8cSEric Bénard int default_irq_mask; 129f441b993SDaniel Mack int use_sdio; 130d96be879SSascha Hauer unsigned int power_mode; 131d96be879SSascha Hauer struct imxmmc_platform_data *pdata; 132d96be879SSascha Hauer 133d96be879SSascha Hauer struct mmc_request *req; 134d96be879SSascha Hauer struct mmc_command *cmd; 135d96be879SSascha Hauer struct mmc_data *data; 136d96be879SSascha Hauer 137d96be879SSascha Hauer unsigned int datasize; 138d96be879SSascha Hauer unsigned int dma_dir; 139d96be879SSascha Hauer 140d96be879SSascha Hauer u16 rev_no; 141d96be879SSascha Hauer unsigned int cmdat; 142d96be879SSascha Hauer 143529aa29eSSascha Hauer struct clk *clk_ipg; 144529aa29eSSascha Hauer struct clk *clk_per; 145d96be879SSascha Hauer 146d96be879SSascha Hauer int clock; 147d96be879SSascha Hauer 148d96be879SSascha Hauer struct work_struct datawork; 149f441b993SDaniel Mack spinlock_t lock; 15074b66954SAlberto Panizzo 151f53fbde4SSascha Hauer int burstlen; 152f53fbde4SSascha Hauer int dmareq; 153f53fbde4SSascha Hauer struct dma_slave_config dma_slave_config; 154f53fbde4SSascha Hauer struct imx_dma_data dma_data; 155f6ad0a48SJavier Martin 156f6ad0a48SJavier Martin struct timer_list watchdog; 1577f917a8dSShawn Guo enum mxcmci_type devtype; 158d96be879SSascha Hauer }; 159d96be879SSascha Hauer 16042477053SAnatolij Gustschin static const struct platform_device_id mxcmci_devtype[] = { 1617f917a8dSShawn Guo { 1627f917a8dSShawn Guo .name = "imx21-mmc", 1637f917a8dSShawn Guo .driver_data = IMX21_MMC, 1647f917a8dSShawn Guo }, { 1657f917a8dSShawn Guo .name = "imx31-mmc", 1667f917a8dSShawn Guo .driver_data = IMX31_MMC, 1677f917a8dSShawn Guo }, { 168c7ceab02SAnatolij Gustschin .name = "mpc512x-sdhc", 169c7ceab02SAnatolij Gustschin .driver_data = MPC512X_MMC, 170c7ceab02SAnatolij Gustschin }, { 1717f917a8dSShawn Guo /* sentinel */ 1727f917a8dSShawn Guo } 1737f917a8dSShawn Guo }; 1747f917a8dSShawn Guo MODULE_DEVICE_TABLE(platform, mxcmci_devtype); 1757f917a8dSShawn Guo 1767ff747c4SMarkus Pargmann static const struct of_device_id mxcmci_of_match[] = { 1777ff747c4SMarkus Pargmann { 1787ff747c4SMarkus Pargmann .compatible = "fsl,imx21-mmc", 1797ff747c4SMarkus Pargmann .data = &mxcmci_devtype[IMX21_MMC], 1807ff747c4SMarkus Pargmann }, { 1817ff747c4SMarkus Pargmann .compatible = "fsl,imx31-mmc", 1827ff747c4SMarkus Pargmann .data = &mxcmci_devtype[IMX31_MMC], 1837ff747c4SMarkus Pargmann }, { 184c7ceab02SAnatolij Gustschin .compatible = "fsl,mpc5121-sdhc", 185c7ceab02SAnatolij Gustschin .data = &mxcmci_devtype[MPC512X_MMC], 186c7ceab02SAnatolij Gustschin }, { 1877ff747c4SMarkus Pargmann /* sentinel */ 1887ff747c4SMarkus Pargmann } 1897ff747c4SMarkus Pargmann }; 1907ff747c4SMarkus Pargmann MODULE_DEVICE_TABLE(of, mxcmci_of_match); 1917ff747c4SMarkus Pargmann 1927f917a8dSShawn Guo static inline int is_imx31_mmc(struct mxcmci_host *host) 1937f917a8dSShawn Guo { 1947f917a8dSShawn Guo return host->devtype == IMX31_MMC; 1957f917a8dSShawn Guo } 1967f917a8dSShawn Guo 197c7ceab02SAnatolij Gustschin static inline int is_mpc512x_mmc(struct mxcmci_host *host) 198c7ceab02SAnatolij Gustschin { 199c7ceab02SAnatolij Gustschin return host->devtype == MPC512X_MMC; 200c7ceab02SAnatolij Gustschin } 201c7ceab02SAnatolij Gustschin 202c7ceab02SAnatolij Gustschin static inline u32 mxcmci_readl(struct mxcmci_host *host, int reg) 203c7ceab02SAnatolij Gustschin { 204c7ceab02SAnatolij Gustschin if (IS_ENABLED(CONFIG_PPC_MPC512x)) 205c7ceab02SAnatolij Gustschin return ioread32be(host->base + reg); 206c7ceab02SAnatolij Gustschin else 207c7ceab02SAnatolij Gustschin return readl(host->base + reg); 208c7ceab02SAnatolij Gustschin } 209c7ceab02SAnatolij Gustschin 210c7ceab02SAnatolij Gustschin static inline void mxcmci_writel(struct mxcmci_host *host, u32 val, int reg) 211c7ceab02SAnatolij Gustschin { 212c7ceab02SAnatolij Gustschin if (IS_ENABLED(CONFIG_PPC_MPC512x)) 213c7ceab02SAnatolij Gustschin iowrite32be(val, host->base + reg); 214c7ceab02SAnatolij Gustschin else 215c7ceab02SAnatolij Gustschin writel(val, host->base + reg); 216c7ceab02SAnatolij Gustschin } 217c7ceab02SAnatolij Gustschin 218c7ceab02SAnatolij Gustschin static inline u16 mxcmci_readw(struct mxcmci_host *host, int reg) 219c7ceab02SAnatolij Gustschin { 220c7ceab02SAnatolij Gustschin if (IS_ENABLED(CONFIG_PPC_MPC512x)) 221c7ceab02SAnatolij Gustschin return ioread32be(host->base + reg); 222c7ceab02SAnatolij Gustschin else 223c7ceab02SAnatolij Gustschin return readw(host->base + reg); 224c7ceab02SAnatolij Gustschin } 225c7ceab02SAnatolij Gustschin 226c7ceab02SAnatolij Gustschin static inline void mxcmci_writew(struct mxcmci_host *host, u16 val, int reg) 227c7ceab02SAnatolij Gustschin { 228c7ceab02SAnatolij Gustschin if (IS_ENABLED(CONFIG_PPC_MPC512x)) 229c7ceab02SAnatolij Gustschin iowrite32be(val, host->base + reg); 230c7ceab02SAnatolij Gustschin else 231c7ceab02SAnatolij Gustschin writew(val, host->base + reg); 232c7ceab02SAnatolij Gustschin } 233c7ceab02SAnatolij Gustschin 23418489fa2SMartin Fuzzey static void mxcmci_set_clk_rate(struct mxcmci_host *host, unsigned int clk_ios); 23518489fa2SMartin Fuzzey 236bc3c1771SAlexander Shiyan static void mxcmci_set_power(struct mxcmci_host *host, unsigned int vdd) 23774b66954SAlberto Panizzo { 238bc3c1771SAlexander Shiyan if (!IS_ERR(host->mmc->supply.vmmc)) { 239bc3c1771SAlexander Shiyan if (host->power_mode == MMC_POWER_UP) 240bc3c1771SAlexander Shiyan mmc_regulator_set_ocr(host->mmc, 241bc3c1771SAlexander Shiyan host->mmc->supply.vmmc, vdd); 242bc3c1771SAlexander Shiyan else if (host->power_mode == MMC_POWER_OFF) 243bc3c1771SAlexander Shiyan mmc_regulator_set_ocr(host->mmc, 244bc3c1771SAlexander Shiyan host->mmc->supply.vmmc, 0); 245d078d242SAlberto Panizzo } 246d078d242SAlberto Panizzo 24774b66954SAlberto Panizzo if (host->pdata && host->pdata->setpower) 24874b66954SAlberto Panizzo host->pdata->setpower(mmc_dev(host->mmc), vdd); 24974b66954SAlberto Panizzo } 25074b66954SAlberto Panizzo 251d96be879SSascha Hauer static inline int mxcmci_use_dma(struct mxcmci_host *host) 252d96be879SSascha Hauer { 253d96be879SSascha Hauer return host->do_dma; 254d96be879SSascha Hauer } 255d96be879SSascha Hauer 256d96be879SSascha Hauer static void mxcmci_softreset(struct mxcmci_host *host) 257d96be879SSascha Hauer { 258d96be879SSascha Hauer int i; 259d96be879SSascha Hauer 2604725f6f1SDaniel Mack dev_dbg(mmc_dev(host->mmc), "mxcmci_softreset\n"); 2614725f6f1SDaniel Mack 262d96be879SSascha Hauer /* reset sequence */ 263c7ceab02SAnatolij Gustschin mxcmci_writew(host, STR_STP_CLK_RESET, MMC_REG_STR_STP_CLK); 264c7ceab02SAnatolij Gustschin mxcmci_writew(host, STR_STP_CLK_RESET | STR_STP_CLK_START_CLK, 265c7ceab02SAnatolij Gustschin MMC_REG_STR_STP_CLK); 266d96be879SSascha Hauer 267d96be879SSascha Hauer for (i = 0; i < 8; i++) 268c7ceab02SAnatolij Gustschin mxcmci_writew(host, STR_STP_CLK_START_CLK, MMC_REG_STR_STP_CLK); 269d96be879SSascha Hauer 270c7ceab02SAnatolij Gustschin mxcmci_writew(host, 0xff, MMC_REG_RES_TO); 271d96be879SSascha Hauer } 272d96be879SSascha Hauer 273e48fc15aSAnatolij Gustschin #if IS_ENABLED(CONFIG_PPC_MPC512x) 274e48fc15aSAnatolij Gustschin static inline void buffer_swap32(u32 *buf, int len) 275e48fc15aSAnatolij Gustschin { 276e48fc15aSAnatolij Gustschin int i; 277e48fc15aSAnatolij Gustschin 278e48fc15aSAnatolij Gustschin for (i = 0; i < ((len + 3) / 4); i++) { 2797a8bf874SDavid Gibson *buf = swab32(*buf); 280e48fc15aSAnatolij Gustschin buf++; 281e48fc15aSAnatolij Gustschin } 282e48fc15aSAnatolij Gustschin } 283e48fc15aSAnatolij Gustschin 284e48fc15aSAnatolij Gustschin static void mxcmci_swap_buffers(struct mmc_data *data) 285e48fc15aSAnatolij Gustschin { 286e48fc15aSAnatolij Gustschin struct scatterlist *sg; 287e48fc15aSAnatolij Gustschin int i; 288e48fc15aSAnatolij Gustschin 2892b77158fSAlexander Shiyan for_each_sg(data->sg, sg, data->sg_len, i) 2902b77158fSAlexander Shiyan buffer_swap32(sg_virt(sg), sg->length); 2913b1074bfSKees Cook } 292e48fc15aSAnatolij Gustschin #else 293e48fc15aSAnatolij Gustschin static inline void mxcmci_swap_buffers(struct mmc_data *data) {} 294e48fc15aSAnatolij Gustschin #endif 295e48fc15aSAnatolij Gustschin 296656217d2SMartin Fuzzey static int mxcmci_setup_data(struct mxcmci_host *host, struct mmc_data *data) 297d96be879SSascha Hauer { 298d96be879SSascha Hauer unsigned int nob = data->blocks; 299d96be879SSascha Hauer unsigned int blksz = data->blksz; 300d96be879SSascha Hauer unsigned int datasize = nob * blksz; 301d96be879SSascha Hauer struct scatterlist *sg; 30205f5799cSVinod Koul enum dma_transfer_direction slave_dirn; 303f53fbde4SSascha Hauer int i, nents; 304f53fbde4SSascha Hauer 305d96be879SSascha Hauer host->data = data; 306d96be879SSascha Hauer data->bytes_xfered = 0; 307d96be879SSascha Hauer 308c7ceab02SAnatolij Gustschin mxcmci_writew(host, nob, MMC_REG_NOB); 309c7ceab02SAnatolij Gustschin mxcmci_writew(host, blksz, MMC_REG_BLK_LEN); 310d96be879SSascha Hauer host->datasize = datasize; 311d96be879SSascha Hauer 312f53fbde4SSascha Hauer if (!mxcmci_use_dma(host)) 313f53fbde4SSascha Hauer return 0; 314f53fbde4SSascha Hauer 315d96be879SSascha Hauer for_each_sg(data->sg, sg, data->sg_len, i) { 3162cb53552SJavier Martin if (sg->offset & 3 || sg->length & 3 || sg->length < 512) { 317d96be879SSascha Hauer host->do_dma = 0; 318656217d2SMartin Fuzzey return 0; 319d96be879SSascha Hauer } 320d96be879SSascha Hauer } 321d96be879SSascha Hauer 32205f5799cSVinod Koul if (data->flags & MMC_DATA_READ) { 323d96be879SSascha Hauer host->dma_dir = DMA_FROM_DEVICE; 32405f5799cSVinod Koul slave_dirn = DMA_DEV_TO_MEM; 32505f5799cSVinod Koul } else { 326d96be879SSascha Hauer host->dma_dir = DMA_TO_DEVICE; 32705f5799cSVinod Koul slave_dirn = DMA_MEM_TO_DEV; 328e48fc15aSAnatolij Gustschin 329e48fc15aSAnatolij Gustschin mxcmci_swap_buffers(data); 33005f5799cSVinod Koul } 331f53fbde4SSascha Hauer 332f53fbde4SSascha Hauer nents = dma_map_sg(host->dma->device->dev, data->sg, 333d96be879SSascha Hauer data->sg_len, host->dma_dir); 334f53fbde4SSascha Hauer if (nents != data->sg_len) 335f53fbde4SSascha Hauer return -EINVAL; 336d96be879SSascha Hauer 33716052827SAlexandre Bounine host->desc = dmaengine_prep_slave_sg(host->dma, 33805f5799cSVinod Koul data->sg, data->sg_len, slave_dirn, 339f53fbde4SSascha Hauer DMA_PREP_INTERRUPT | DMA_CTRL_ACK); 340d96be879SSascha Hauer 341f53fbde4SSascha Hauer if (!host->desc) { 342f53fbde4SSascha Hauer dma_unmap_sg(host->dma->device->dev, data->sg, data->sg_len, 343f53fbde4SSascha Hauer host->dma_dir); 344f53fbde4SSascha Hauer host->do_dma = 0; 345f53fbde4SSascha Hauer return 0; /* Fall back to PIO */ 346656217d2SMartin Fuzzey } 347d96be879SSascha Hauer wmb(); 348d96be879SSascha Hauer 349f53fbde4SSascha Hauer dmaengine_submit(host->desc); 350439aa0efSSascha Hauer dma_async_issue_pending(host->dma); 351f53fbde4SSascha Hauer 352f6ad0a48SJavier Martin mod_timer(&host->watchdog, jiffies + msecs_to_jiffies(MXCMCI_TIMEOUT_MS)); 353f6ad0a48SJavier Martin 354656217d2SMartin Fuzzey return 0; 355d96be879SSascha Hauer } 356d96be879SSascha Hauer 357f6ad0a48SJavier Martin static void mxcmci_cmd_done(struct mxcmci_host *host, unsigned int stat); 358f6ad0a48SJavier Martin static void mxcmci_data_done(struct mxcmci_host *host, unsigned int stat); 359f6ad0a48SJavier Martin 360f6ad0a48SJavier Martin static void mxcmci_dma_callback(void *data) 361f6ad0a48SJavier Martin { 362f6ad0a48SJavier Martin struct mxcmci_host *host = data; 363f6ad0a48SJavier Martin u32 stat; 364f6ad0a48SJavier Martin 365f6ad0a48SJavier Martin del_timer(&host->watchdog); 366f6ad0a48SJavier Martin 367c7ceab02SAnatolij Gustschin stat = mxcmci_readl(host, MMC_REG_STATUS); 368f6ad0a48SJavier Martin 369f6ad0a48SJavier Martin dev_dbg(mmc_dev(host->mmc), "%s: 0x%08x\n", __func__, stat); 370f6ad0a48SJavier Martin 371f6ad0a48SJavier Martin mxcmci_data_done(host, stat); 372f6ad0a48SJavier Martin } 373f6ad0a48SJavier Martin 374d96be879SSascha Hauer static int mxcmci_start_cmd(struct mxcmci_host *host, struct mmc_command *cmd, 375d96be879SSascha Hauer unsigned int cmdat) 376d96be879SSascha Hauer { 37716b3bf8cSEric Bénard u32 int_cntr = host->default_irq_mask; 378f441b993SDaniel Mack unsigned long flags; 379f441b993SDaniel Mack 380d96be879SSascha Hauer WARN_ON(host->cmd != NULL); 381d96be879SSascha Hauer host->cmd = cmd; 382d96be879SSascha Hauer 383d96be879SSascha Hauer switch (mmc_resp_type(cmd)) { 384d96be879SSascha Hauer case MMC_RSP_R1: /* short CRC, OPCODE */ 385d96be879SSascha Hauer case MMC_RSP_R1B:/* short CRC, OPCODE, BUSY */ 386d96be879SSascha Hauer cmdat |= CMD_DAT_CONT_RESPONSE_48BIT_CRC; 387d96be879SSascha Hauer break; 388d96be879SSascha Hauer case MMC_RSP_R2: /* long 136 bit + CRC */ 389d96be879SSascha Hauer cmdat |= CMD_DAT_CONT_RESPONSE_136BIT; 390d96be879SSascha Hauer break; 391d96be879SSascha Hauer case MMC_RSP_R3: /* short */ 392d96be879SSascha Hauer cmdat |= CMD_DAT_CONT_RESPONSE_48BIT; 393d96be879SSascha Hauer break; 394d96be879SSascha Hauer case MMC_RSP_NONE: 395d96be879SSascha Hauer break; 396d96be879SSascha Hauer default: 397d96be879SSascha Hauer dev_err(mmc_dev(host->mmc), "unhandled response type 0x%x\n", 398d96be879SSascha Hauer mmc_resp_type(cmd)); 399d96be879SSascha Hauer cmd->error = -EINVAL; 400d96be879SSascha Hauer return -EINVAL; 401d96be879SSascha Hauer } 402d96be879SSascha Hauer 403f441b993SDaniel Mack int_cntr = INT_END_CMD_RES_EN; 404f441b993SDaniel Mack 405f6ad0a48SJavier Martin if (mxcmci_use_dma(host)) { 406f6ad0a48SJavier Martin if (host->dma_dir == DMA_FROM_DEVICE) { 407f6ad0a48SJavier Martin host->desc->callback = mxcmci_dma_callback; 408f6ad0a48SJavier Martin host->desc->callback_param = host; 409f6ad0a48SJavier Martin } else { 410f6ad0a48SJavier Martin int_cntr |= INT_WRITE_OP_DONE_EN; 411f6ad0a48SJavier Martin } 412f6ad0a48SJavier Martin } 413f441b993SDaniel Mack 414f441b993SDaniel Mack spin_lock_irqsave(&host->lock, flags); 415f441b993SDaniel Mack if (host->use_sdio) 416f441b993SDaniel Mack int_cntr |= INT_SDIO_IRQ_EN; 417c7ceab02SAnatolij Gustschin mxcmci_writel(host, int_cntr, MMC_REG_INT_CNTR); 418f441b993SDaniel Mack spin_unlock_irqrestore(&host->lock, flags); 419d96be879SSascha Hauer 420c7ceab02SAnatolij Gustschin mxcmci_writew(host, cmd->opcode, MMC_REG_CMD); 421c7ceab02SAnatolij Gustschin mxcmci_writel(host, cmd->arg, MMC_REG_ARG); 422c7ceab02SAnatolij Gustschin mxcmci_writew(host, cmdat, MMC_REG_CMD_DAT_CONT); 423d96be879SSascha Hauer 424d96be879SSascha Hauer return 0; 425d96be879SSascha Hauer } 426d96be879SSascha Hauer 427d96be879SSascha Hauer static void mxcmci_finish_request(struct mxcmci_host *host, 428d96be879SSascha Hauer struct mmc_request *req) 429d96be879SSascha Hauer { 43016b3bf8cSEric Bénard u32 int_cntr = host->default_irq_mask; 431f441b993SDaniel Mack unsigned long flags; 432f441b993SDaniel Mack 433f441b993SDaniel Mack spin_lock_irqsave(&host->lock, flags); 434f441b993SDaniel Mack if (host->use_sdio) 435f441b993SDaniel Mack int_cntr |= INT_SDIO_IRQ_EN; 436c7ceab02SAnatolij Gustschin mxcmci_writel(host, int_cntr, MMC_REG_INT_CNTR); 437f441b993SDaniel Mack spin_unlock_irqrestore(&host->lock, flags); 438d96be879SSascha Hauer 439d96be879SSascha Hauer host->req = NULL; 440d96be879SSascha Hauer host->cmd = NULL; 441d96be879SSascha Hauer host->data = NULL; 442d96be879SSascha Hauer 443d96be879SSascha Hauer mmc_request_done(host->mmc, req); 444d96be879SSascha Hauer } 445d96be879SSascha Hauer 446d96be879SSascha Hauer static int mxcmci_finish_data(struct mxcmci_host *host, unsigned int stat) 447d96be879SSascha Hauer { 448d96be879SSascha Hauer struct mmc_data *data = host->data; 449d96be879SSascha Hauer int data_error; 450d96be879SSascha Hauer 451e48fc15aSAnatolij Gustschin if (mxcmci_use_dma(host)) { 452f53fbde4SSascha Hauer dma_unmap_sg(host->dma->device->dev, data->sg, data->sg_len, 453d96be879SSascha Hauer host->dma_dir); 454e48fc15aSAnatolij Gustschin mxcmci_swap_buffers(data); 455e48fc15aSAnatolij Gustschin } 456d96be879SSascha Hauer 457d96be879SSascha Hauer if (stat & STATUS_ERR_MASK) { 458d96be879SSascha Hauer dev_dbg(mmc_dev(host->mmc), "request failed. status: 0x%08x\n", 459d96be879SSascha Hauer stat); 460d96be879SSascha Hauer if (stat & STATUS_CRC_READ_ERR) { 4614725f6f1SDaniel Mack dev_err(mmc_dev(host->mmc), "%s: -EILSEQ\n", __func__); 462d96be879SSascha Hauer data->error = -EILSEQ; 463d96be879SSascha Hauer } else if (stat & STATUS_CRC_WRITE_ERR) { 464d96be879SSascha Hauer u32 err_code = (stat >> 9) & 0x3; 4654725f6f1SDaniel Mack if (err_code == 2) { /* No CRC response */ 4664725f6f1SDaniel Mack dev_err(mmc_dev(host->mmc), 4674725f6f1SDaniel Mack "%s: No CRC -ETIMEDOUT\n", __func__); 468d96be879SSascha Hauer data->error = -ETIMEDOUT; 469d96be879SSascha Hauer } else { 4704725f6f1SDaniel Mack dev_err(mmc_dev(host->mmc), 4714725f6f1SDaniel Mack "%s: -EILSEQ\n", __func__); 4724725f6f1SDaniel Mack data->error = -EILSEQ; 4734725f6f1SDaniel Mack } 4744725f6f1SDaniel Mack } else if (stat & STATUS_TIME_OUT_READ) { 4754725f6f1SDaniel Mack dev_err(mmc_dev(host->mmc), 4764725f6f1SDaniel Mack "%s: read -ETIMEDOUT\n", __func__); 4774725f6f1SDaniel Mack data->error = -ETIMEDOUT; 4784725f6f1SDaniel Mack } else { 4794725f6f1SDaniel Mack dev_err(mmc_dev(host->mmc), "%s: -EIO\n", __func__); 480d96be879SSascha Hauer data->error = -EIO; 481d96be879SSascha Hauer } 482d96be879SSascha Hauer } else { 483d96be879SSascha Hauer data->bytes_xfered = host->datasize; 484d96be879SSascha Hauer } 485d96be879SSascha Hauer 486d96be879SSascha Hauer data_error = data->error; 487d96be879SSascha Hauer 488d96be879SSascha Hauer host->data = NULL; 489d96be879SSascha Hauer 490d96be879SSascha Hauer return data_error; 491d96be879SSascha Hauer } 492d96be879SSascha Hauer 493d96be879SSascha Hauer static void mxcmci_read_response(struct mxcmci_host *host, unsigned int stat) 494d96be879SSascha Hauer { 495d96be879SSascha Hauer struct mmc_command *cmd = host->cmd; 496d96be879SSascha Hauer int i; 497d96be879SSascha Hauer u32 a, b, c; 498d96be879SSascha Hauer 499d96be879SSascha Hauer if (!cmd) 500d96be879SSascha Hauer return; 501d96be879SSascha Hauer 502d96be879SSascha Hauer if (stat & STATUS_TIME_OUT_RESP) { 503d96be879SSascha Hauer dev_dbg(mmc_dev(host->mmc), "CMD TIMEOUT\n"); 504d96be879SSascha Hauer cmd->error = -ETIMEDOUT; 505d96be879SSascha Hauer } else if (stat & STATUS_RESP_CRC_ERR && cmd->flags & MMC_RSP_CRC) { 506d96be879SSascha Hauer dev_dbg(mmc_dev(host->mmc), "cmd crc error\n"); 507d96be879SSascha Hauer cmd->error = -EILSEQ; 508d96be879SSascha Hauer } 509d96be879SSascha Hauer 510d96be879SSascha Hauer if (cmd->flags & MMC_RSP_PRESENT) { 511d96be879SSascha Hauer if (cmd->flags & MMC_RSP_136) { 512d96be879SSascha Hauer for (i = 0; i < 4; i++) { 513c7ceab02SAnatolij Gustschin a = mxcmci_readw(host, MMC_REG_RES_FIFO); 514c7ceab02SAnatolij Gustschin b = mxcmci_readw(host, MMC_REG_RES_FIFO); 515d96be879SSascha Hauer cmd->resp[i] = a << 16 | b; 516d96be879SSascha Hauer } 517d96be879SSascha Hauer } else { 518c7ceab02SAnatolij Gustschin a = mxcmci_readw(host, MMC_REG_RES_FIFO); 519c7ceab02SAnatolij Gustschin b = mxcmci_readw(host, MMC_REG_RES_FIFO); 520c7ceab02SAnatolij Gustschin c = mxcmci_readw(host, MMC_REG_RES_FIFO); 521d96be879SSascha Hauer cmd->resp[0] = a << 24 | b << 8 | c >> 8; 522d96be879SSascha Hauer } 523d96be879SSascha Hauer } 524d96be879SSascha Hauer } 525d96be879SSascha Hauer 526d96be879SSascha Hauer static int mxcmci_poll_status(struct mxcmci_host *host, u32 mask) 527d96be879SSascha Hauer { 528d96be879SSascha Hauer u32 stat; 529d96be879SSascha Hauer unsigned long timeout = jiffies + HZ; 530d96be879SSascha Hauer 531d96be879SSascha Hauer do { 532c7ceab02SAnatolij Gustschin stat = mxcmci_readl(host, MMC_REG_STATUS); 533d96be879SSascha Hauer if (stat & STATUS_ERR_MASK) 534d96be879SSascha Hauer return stat; 53518489fa2SMartin Fuzzey if (time_after(jiffies, timeout)) { 53618489fa2SMartin Fuzzey mxcmci_softreset(host); 53718489fa2SMartin Fuzzey mxcmci_set_clk_rate(host, host->clock); 538d96be879SSascha Hauer return STATUS_TIME_OUT_READ; 53918489fa2SMartin Fuzzey } 540d96be879SSascha Hauer if (stat & mask) 541d96be879SSascha Hauer return 0; 542d96be879SSascha Hauer cpu_relax(); 543d96be879SSascha Hauer } while (1); 544d96be879SSascha Hauer } 545d96be879SSascha Hauer 546d96be879SSascha Hauer static int mxcmci_pull(struct mxcmci_host *host, void *_buf, int bytes) 547d96be879SSascha Hauer { 548d96be879SSascha Hauer unsigned int stat; 549d96be879SSascha Hauer u32 *buf = _buf; 550d96be879SSascha Hauer 551d96be879SSascha Hauer while (bytes > 3) { 552d96be879SSascha Hauer stat = mxcmci_poll_status(host, 553d96be879SSascha Hauer STATUS_BUF_READ_RDY | STATUS_READ_OP_DONE); 554d96be879SSascha Hauer if (stat) 555d96be879SSascha Hauer return stat; 556c7ceab02SAnatolij Gustschin *buf++ = cpu_to_le32(mxcmci_readl(host, MMC_REG_BUFFER_ACCESS)); 557d96be879SSascha Hauer bytes -= 4; 558d96be879SSascha Hauer } 559d96be879SSascha Hauer 560d96be879SSascha Hauer if (bytes) { 561d96be879SSascha Hauer u8 *b = (u8 *)buf; 562d96be879SSascha Hauer u32 tmp; 563d96be879SSascha Hauer 564d96be879SSascha Hauer stat = mxcmci_poll_status(host, 565d96be879SSascha Hauer STATUS_BUF_READ_RDY | STATUS_READ_OP_DONE); 566d96be879SSascha Hauer if (stat) 567d96be879SSascha Hauer return stat; 568c7ceab02SAnatolij Gustschin tmp = cpu_to_le32(mxcmci_readl(host, MMC_REG_BUFFER_ACCESS)); 569d96be879SSascha Hauer memcpy(b, &tmp, bytes); 570d96be879SSascha Hauer } 571d96be879SSascha Hauer 572d96be879SSascha Hauer return 0; 573d96be879SSascha Hauer } 574d96be879SSascha Hauer 575d96be879SSascha Hauer static int mxcmci_push(struct mxcmci_host *host, void *_buf, int bytes) 576d96be879SSascha Hauer { 577d96be879SSascha Hauer unsigned int stat; 578d96be879SSascha Hauer u32 *buf = _buf; 579d96be879SSascha Hauer 580d96be879SSascha Hauer while (bytes > 3) { 581d96be879SSascha Hauer stat = mxcmci_poll_status(host, STATUS_BUF_WRITE_RDY); 582d96be879SSascha Hauer if (stat) 583d96be879SSascha Hauer return stat; 584c7ceab02SAnatolij Gustschin mxcmci_writel(host, cpu_to_le32(*buf++), MMC_REG_BUFFER_ACCESS); 585d96be879SSascha Hauer bytes -= 4; 586d96be879SSascha Hauer } 587d96be879SSascha Hauer 588d96be879SSascha Hauer if (bytes) { 589d96be879SSascha Hauer u8 *b = (u8 *)buf; 590d96be879SSascha Hauer u32 tmp; 591d96be879SSascha Hauer 592d96be879SSascha Hauer stat = mxcmci_poll_status(host, STATUS_BUF_WRITE_RDY); 593d96be879SSascha Hauer if (stat) 594d96be879SSascha Hauer return stat; 595d96be879SSascha Hauer 596d96be879SSascha Hauer memcpy(&tmp, b, bytes); 597c7ceab02SAnatolij Gustschin mxcmci_writel(host, cpu_to_le32(tmp), MMC_REG_BUFFER_ACCESS); 598d96be879SSascha Hauer } 599d96be879SSascha Hauer 6006d916416SFabio Estevam return mxcmci_poll_status(host, STATUS_BUF_WRITE_RDY); 601d96be879SSascha Hauer } 602d96be879SSascha Hauer 603d96be879SSascha Hauer static int mxcmci_transfer_data(struct mxcmci_host *host) 604d96be879SSascha Hauer { 605d96be879SSascha Hauer struct mmc_data *data = host->req->data; 606d96be879SSascha Hauer struct scatterlist *sg; 607d96be879SSascha Hauer int stat, i; 608d96be879SSascha Hauer 609d96be879SSascha Hauer host->data = data; 610d96be879SSascha Hauer host->datasize = 0; 611d96be879SSascha Hauer 612d96be879SSascha Hauer if (data->flags & MMC_DATA_READ) { 613d96be879SSascha Hauer for_each_sg(data->sg, sg, data->sg_len, i) { 6142b77158fSAlexander Shiyan stat = mxcmci_pull(host, sg_virt(sg), sg->length); 615d96be879SSascha Hauer if (stat) 616d96be879SSascha Hauer return stat; 617d96be879SSascha Hauer host->datasize += sg->length; 618d96be879SSascha Hauer } 619d96be879SSascha Hauer } else { 620d96be879SSascha Hauer for_each_sg(data->sg, sg, data->sg_len, i) { 6212b77158fSAlexander Shiyan stat = mxcmci_push(host, sg_virt(sg), sg->length); 622d96be879SSascha Hauer if (stat) 623d96be879SSascha Hauer return stat; 624d96be879SSascha Hauer host->datasize += sg->length; 625d96be879SSascha Hauer } 626d96be879SSascha Hauer stat = mxcmci_poll_status(host, STATUS_WRITE_OP_DONE); 627d96be879SSascha Hauer if (stat) 628d96be879SSascha Hauer return stat; 629d96be879SSascha Hauer } 630d96be879SSascha Hauer return 0; 631d96be879SSascha Hauer } 632d96be879SSascha Hauer 633d96be879SSascha Hauer static void mxcmci_datawork(struct work_struct *work) 634d96be879SSascha Hauer { 635d96be879SSascha Hauer struct mxcmci_host *host = container_of(work, struct mxcmci_host, 636d96be879SSascha Hauer datawork); 637d96be879SSascha Hauer int datastat = mxcmci_transfer_data(host); 6384a31f2efSDaniel Mack 639c7ceab02SAnatolij Gustschin mxcmci_writel(host, STATUS_READ_OP_DONE | STATUS_WRITE_OP_DONE, 640c7ceab02SAnatolij Gustschin MMC_REG_STATUS); 641d96be879SSascha Hauer mxcmci_finish_data(host, datastat); 642d96be879SSascha Hauer 643d96be879SSascha Hauer if (host->req->stop) { 644d96be879SSascha Hauer if (mxcmci_start_cmd(host, host->req->stop, 0)) { 645d96be879SSascha Hauer mxcmci_finish_request(host, host->req); 646d96be879SSascha Hauer return; 647d96be879SSascha Hauer } 648d96be879SSascha Hauer } else { 649d96be879SSascha Hauer mxcmci_finish_request(host, host->req); 650d96be879SSascha Hauer } 651d96be879SSascha Hauer } 652d96be879SSascha Hauer 653d96be879SSascha Hauer static void mxcmci_data_done(struct mxcmci_host *host, unsigned int stat) 654d96be879SSascha Hauer { 65570aa6109SAnatolij Gustschin struct mmc_request *req; 656d96be879SSascha Hauer int data_error; 65770aa6109SAnatolij Gustschin unsigned long flags; 658d96be879SSascha Hauer 65970aa6109SAnatolij Gustschin spin_lock_irqsave(&host->lock, flags); 66070aa6109SAnatolij Gustschin 66170aa6109SAnatolij Gustschin if (!host->data) { 66270aa6109SAnatolij Gustschin spin_unlock_irqrestore(&host->lock, flags); 663d96be879SSascha Hauer return; 66470aa6109SAnatolij Gustschin } 66570aa6109SAnatolij Gustschin 66670aa6109SAnatolij Gustschin if (!host->req) { 66770aa6109SAnatolij Gustschin spin_unlock_irqrestore(&host->lock, flags); 66870aa6109SAnatolij Gustschin return; 66970aa6109SAnatolij Gustschin } 67070aa6109SAnatolij Gustschin 67170aa6109SAnatolij Gustschin req = host->req; 67270aa6109SAnatolij Gustschin if (!req->stop) 67370aa6109SAnatolij Gustschin host->req = NULL; /* we will handle finish req below */ 674d96be879SSascha Hauer 675d96be879SSascha Hauer data_error = mxcmci_finish_data(host, stat); 676d96be879SSascha Hauer 67770aa6109SAnatolij Gustschin spin_unlock_irqrestore(&host->lock, flags); 67870aa6109SAnatolij Gustschin 67909954ea9SShawn Lin if (data_error) 68009954ea9SShawn Lin return; 68109954ea9SShawn Lin 682d96be879SSascha Hauer mxcmci_read_response(host, stat); 683d96be879SSascha Hauer host->cmd = NULL; 684d96be879SSascha Hauer 68570aa6109SAnatolij Gustschin if (req->stop) { 68670aa6109SAnatolij Gustschin if (mxcmci_start_cmd(host, req->stop, 0)) { 68770aa6109SAnatolij Gustschin mxcmci_finish_request(host, req); 688d96be879SSascha Hauer return; 689d96be879SSascha Hauer } 690d96be879SSascha Hauer } else { 69170aa6109SAnatolij Gustschin mxcmci_finish_request(host, req); 692d96be879SSascha Hauer } 693d96be879SSascha Hauer } 694d96be879SSascha Hauer 695d96be879SSascha Hauer static void mxcmci_cmd_done(struct mxcmci_host *host, unsigned int stat) 696d96be879SSascha Hauer { 697d96be879SSascha Hauer mxcmci_read_response(host, stat); 698d96be879SSascha Hauer host->cmd = NULL; 699d96be879SSascha Hauer 700d96be879SSascha Hauer if (!host->data && host->req) { 701d96be879SSascha Hauer mxcmci_finish_request(host, host->req); 702d96be879SSascha Hauer return; 703d96be879SSascha Hauer } 704d96be879SSascha Hauer 705d96be879SSascha Hauer /* For the DMA case the DMA engine handles the data transfer 706fd589a8fSAnand Gadiyar * automatically. For non DMA we have to do it ourselves. 707d96be879SSascha Hauer * Don't do it in interrupt context though. 708d96be879SSascha Hauer */ 709d96be879SSascha Hauer if (!mxcmci_use_dma(host) && host->data) 710d96be879SSascha Hauer schedule_work(&host->datawork); 711d96be879SSascha Hauer 712d96be879SSascha Hauer } 713d96be879SSascha Hauer 714d96be879SSascha Hauer static irqreturn_t mxcmci_irq(int irq, void *devid) 715d96be879SSascha Hauer { 716d96be879SSascha Hauer struct mxcmci_host *host = devid; 717f441b993SDaniel Mack bool sdio_irq; 718d96be879SSascha Hauer u32 stat; 719d96be879SSascha Hauer 720c7ceab02SAnatolij Gustschin stat = mxcmci_readl(host, MMC_REG_STATUS); 721c7ceab02SAnatolij Gustschin mxcmci_writel(host, 722c7ceab02SAnatolij Gustschin stat & ~(STATUS_SDIO_INT_ACTIVE | STATUS_DATA_TRANS_DONE | 723c7ceab02SAnatolij Gustschin STATUS_WRITE_OP_DONE), 724c7ceab02SAnatolij Gustschin MMC_REG_STATUS); 725d96be879SSascha Hauer 726d96be879SSascha Hauer dev_dbg(mmc_dev(host->mmc), "%s: 0x%08x\n", __func__, stat); 727d96be879SSascha Hauer 7285a941898Sjun qian spin_lock(&host->lock); 729f441b993SDaniel Mack sdio_irq = (stat & STATUS_SDIO_INT_ACTIVE) && host->use_sdio; 7305a941898Sjun qian spin_unlock(&host->lock); 731f441b993SDaniel Mack 732adfa5703SMatteo Facchinetti if (mxcmci_use_dma(host) && (stat & (STATUS_WRITE_OP_DONE))) 733adfa5703SMatteo Facchinetti mxcmci_writel(host, STATUS_WRITE_OP_DONE, MMC_REG_STATUS); 7344a31f2efSDaniel Mack 735f441b993SDaniel Mack if (sdio_irq) { 736c7ceab02SAnatolij Gustschin mxcmci_writel(host, STATUS_SDIO_INT_ACTIVE, MMC_REG_STATUS); 737f441b993SDaniel Mack mmc_signal_sdio_irq(host->mmc); 738f441b993SDaniel Mack } 739f441b993SDaniel Mack 740d96be879SSascha Hauer if (stat & STATUS_END_CMD_RESP) 741d96be879SSascha Hauer mxcmci_cmd_done(host, stat); 742f441b993SDaniel Mack 743adfa5703SMatteo Facchinetti if (mxcmci_use_dma(host) && (stat & STATUS_WRITE_OP_DONE)) { 744f6ad0a48SJavier Martin del_timer(&host->watchdog); 745d96be879SSascha Hauer mxcmci_data_done(host, stat); 746f6ad0a48SJavier Martin } 747f53fbde4SSascha Hauer 74816b3bf8cSEric Bénard if (host->default_irq_mask && 74916b3bf8cSEric Bénard (stat & (STATUS_CARD_INSERTION | STATUS_CARD_REMOVAL))) 75016b3bf8cSEric Bénard mmc_detect_change(host->mmc, msecs_to_jiffies(200)); 751f53fbde4SSascha Hauer 752d96be879SSascha Hauer return IRQ_HANDLED; 753d96be879SSascha Hauer } 754d96be879SSascha Hauer 755d96be879SSascha Hauer static void mxcmci_request(struct mmc_host *mmc, struct mmc_request *req) 756d96be879SSascha Hauer { 757d96be879SSascha Hauer struct mxcmci_host *host = mmc_priv(mmc); 758d96be879SSascha Hauer unsigned int cmdat = host->cmdat; 759656217d2SMartin Fuzzey int error; 760d96be879SSascha Hauer 761d96be879SSascha Hauer WARN_ON(host->req != NULL); 762d96be879SSascha Hauer 763d96be879SSascha Hauer host->req = req; 764d96be879SSascha Hauer host->cmdat &= ~CMD_DAT_CONT_INIT; 765f53fbde4SSascha Hauer 766f53fbde4SSascha Hauer if (host->dma) 767d96be879SSascha Hauer host->do_dma = 1; 768f53fbde4SSascha Hauer 769d96be879SSascha Hauer if (req->data) { 770656217d2SMartin Fuzzey error = mxcmci_setup_data(host, req->data); 771656217d2SMartin Fuzzey if (error) { 772656217d2SMartin Fuzzey req->cmd->error = error; 773656217d2SMartin Fuzzey goto out; 774656217d2SMartin Fuzzey } 775656217d2SMartin Fuzzey 776d96be879SSascha Hauer 777d96be879SSascha Hauer cmdat |= CMD_DAT_CONT_DATA_ENABLE; 778d96be879SSascha Hauer 779d96be879SSascha Hauer if (req->data->flags & MMC_DATA_WRITE) 780d96be879SSascha Hauer cmdat |= CMD_DAT_CONT_WRITE; 781d96be879SSascha Hauer } 782d96be879SSascha Hauer 783656217d2SMartin Fuzzey error = mxcmci_start_cmd(host, req->cmd, cmdat); 784f53fbde4SSascha Hauer 785656217d2SMartin Fuzzey out: 786656217d2SMartin Fuzzey if (error) 787d96be879SSascha Hauer mxcmci_finish_request(host, req); 788d96be879SSascha Hauer } 789d96be879SSascha Hauer 790d96be879SSascha Hauer static void mxcmci_set_clk_rate(struct mxcmci_host *host, unsigned int clk_ios) 791d96be879SSascha Hauer { 792d96be879SSascha Hauer unsigned int divider; 793d96be879SSascha Hauer int prescaler = 0; 794529aa29eSSascha Hauer unsigned int clk_in = clk_get_rate(host->clk_per); 795d96be879SSascha Hauer 796d96be879SSascha Hauer while (prescaler <= 0x800) { 797d96be879SSascha Hauer for (divider = 1; divider <= 0xF; divider++) { 798d96be879SSascha Hauer int x; 799d96be879SSascha Hauer 800d96be879SSascha Hauer x = (clk_in / (divider + 1)); 801d96be879SSascha Hauer 802d96be879SSascha Hauer if (prescaler) 803d96be879SSascha Hauer x /= (prescaler * 2); 804d96be879SSascha Hauer 805d96be879SSascha Hauer if (x <= clk_ios) 806d96be879SSascha Hauer break; 807d96be879SSascha Hauer } 808d96be879SSascha Hauer if (divider < 0x10) 809d96be879SSascha Hauer break; 810d96be879SSascha Hauer 811d96be879SSascha Hauer if (prescaler == 0) 812d96be879SSascha Hauer prescaler = 1; 813d96be879SSascha Hauer else 814d96be879SSascha Hauer prescaler <<= 1; 815d96be879SSascha Hauer } 816d96be879SSascha Hauer 817c7ceab02SAnatolij Gustschin mxcmci_writew(host, (prescaler << 4) | divider, MMC_REG_CLK_RATE); 818d96be879SSascha Hauer 819d96be879SSascha Hauer dev_dbg(mmc_dev(host->mmc), "scaler: %d divider: %d in: %d out: %d\n", 820d96be879SSascha Hauer prescaler, divider, clk_in, clk_ios); 821d96be879SSascha Hauer } 822d96be879SSascha Hauer 823f53fbde4SSascha Hauer static int mxcmci_setup_dma(struct mmc_host *mmc) 824f53fbde4SSascha Hauer { 825f53fbde4SSascha Hauer struct mxcmci_host *host = mmc_priv(mmc); 826f53fbde4SSascha Hauer struct dma_slave_config *config = &host->dma_slave_config; 827f53fbde4SSascha Hauer 82801e4f958SAlexander Shiyan config->dst_addr = host->phys_base + MMC_REG_BUFFER_ACCESS; 82901e4f958SAlexander Shiyan config->src_addr = host->phys_base + MMC_REG_BUFFER_ACCESS; 830f53fbde4SSascha Hauer config->dst_addr_width = 4; 831f53fbde4SSascha Hauer config->src_addr_width = 4; 832f53fbde4SSascha Hauer config->dst_maxburst = host->burstlen; 833f53fbde4SSascha Hauer config->src_maxburst = host->burstlen; 834258aea76SViresh Kumar config->device_fc = false; 835f53fbde4SSascha Hauer 836f53fbde4SSascha Hauer return dmaengine_slave_config(host->dma, config); 837f53fbde4SSascha Hauer } 838f53fbde4SSascha Hauer 839d96be879SSascha Hauer static void mxcmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) 840d96be879SSascha Hauer { 841d96be879SSascha Hauer struct mxcmci_host *host = mmc_priv(mmc); 842f53fbde4SSascha Hauer int burstlen, ret; 843f53fbde4SSascha Hauer 844d96be879SSascha Hauer /* 8456584cb88SSascha Hauer * use burstlen of 64 (16 words) in 4 bit mode (--> reg value 0) 8466584cb88SSascha Hauer * use burstlen of 16 (4 words) in 1 bit mode (--> reg value 16) 847d96be879SSascha Hauer */ 848d96be879SSascha Hauer if (ios->bus_width == MMC_BUS_WIDTH_4) 849f53fbde4SSascha Hauer burstlen = 16; 8506584cb88SSascha Hauer else 8516584cb88SSascha Hauer burstlen = 4; 852d96be879SSascha Hauer 853f53fbde4SSascha Hauer if (mxcmci_use_dma(host) && burstlen != host->burstlen) { 854f53fbde4SSascha Hauer host->burstlen = burstlen; 855f53fbde4SSascha Hauer ret = mxcmci_setup_dma(mmc); 856f53fbde4SSascha Hauer if (ret) { 857f53fbde4SSascha Hauer dev_err(mmc_dev(host->mmc), 858f53fbde4SSascha Hauer "failed to config DMA channel. Falling back to PIO\n"); 859f53fbde4SSascha Hauer dma_release_channel(host->dma); 860f53fbde4SSascha Hauer host->do_dma = 0; 861e58f516fSSascha Hauer host->dma = NULL; 862f53fbde4SSascha Hauer } 863f53fbde4SSascha Hauer } 864f53fbde4SSascha Hauer 865d96be879SSascha Hauer if (ios->bus_width == MMC_BUS_WIDTH_4) 866d96be879SSascha Hauer host->cmdat |= CMD_DAT_CONT_BUS_WIDTH_4; 867d96be879SSascha Hauer else 868d96be879SSascha Hauer host->cmdat &= ~CMD_DAT_CONT_BUS_WIDTH_4; 869d96be879SSascha Hauer 870d96be879SSascha Hauer if (host->power_mode != ios->power_mode) { 871d96be879SSascha Hauer host->power_mode = ios->power_mode; 872bc3c1771SAlexander Shiyan mxcmci_set_power(host, ios->vdd); 87374b66954SAlberto Panizzo 874d96be879SSascha Hauer if (ios->power_mode == MMC_POWER_ON) 875d96be879SSascha Hauer host->cmdat |= CMD_DAT_CONT_INIT; 876d96be879SSascha Hauer } 877d96be879SSascha Hauer 878d96be879SSascha Hauer if (ios->clock) { 879d96be879SSascha Hauer mxcmci_set_clk_rate(host, ios->clock); 880c7ceab02SAnatolij Gustschin mxcmci_writew(host, STR_STP_CLK_START_CLK, MMC_REG_STR_STP_CLK); 881d96be879SSascha Hauer } else { 882c7ceab02SAnatolij Gustschin mxcmci_writew(host, STR_STP_CLK_STOP_CLK, MMC_REG_STR_STP_CLK); 883d96be879SSascha Hauer } 884d96be879SSascha Hauer 885d96be879SSascha Hauer host->clock = ios->clock; 886d96be879SSascha Hauer } 887d96be879SSascha Hauer 888d96be879SSascha Hauer static irqreturn_t mxcmci_detect_irq(int irq, void *data) 889d96be879SSascha Hauer { 890d96be879SSascha Hauer struct mmc_host *mmc = data; 891d96be879SSascha Hauer 892d96be879SSascha Hauer dev_dbg(mmc_dev(mmc), "%s\n", __func__); 893d96be879SSascha Hauer 894d96be879SSascha Hauer mmc_detect_change(mmc, msecs_to_jiffies(250)); 895d96be879SSascha Hauer return IRQ_HANDLED; 896d96be879SSascha Hauer } 897d96be879SSascha Hauer 898d96be879SSascha Hauer static int mxcmci_get_ro(struct mmc_host *mmc) 899d96be879SSascha Hauer { 900d96be879SSascha Hauer struct mxcmci_host *host = mmc_priv(mmc); 901d96be879SSascha Hauer 902d96be879SSascha Hauer if (host->pdata && host->pdata->get_ro) 903d96be879SSascha Hauer return !!host->pdata->get_ro(mmc_dev(mmc)); 904d96be879SSascha Hauer /* 905bcf53524SAnatolij Gustschin * If board doesn't support read only detection (no mmc_gpio 906bcf53524SAnatolij Gustschin * context or gpio is invalid), then let the mmc core decide 907bcf53524SAnatolij Gustschin * what to do. 908d96be879SSascha Hauer */ 909bcf53524SAnatolij Gustschin return mmc_gpio_get_ro(mmc); 910d96be879SSascha Hauer } 911d96be879SSascha Hauer 912f441b993SDaniel Mack static void mxcmci_enable_sdio_irq(struct mmc_host *mmc, int enable) 913f441b993SDaniel Mack { 914f441b993SDaniel Mack struct mxcmci_host *host = mmc_priv(mmc); 915f441b993SDaniel Mack unsigned long flags; 916f441b993SDaniel Mack u32 int_cntr; 917f441b993SDaniel Mack 918f441b993SDaniel Mack spin_lock_irqsave(&host->lock, flags); 919f441b993SDaniel Mack host->use_sdio = enable; 920c7ceab02SAnatolij Gustschin int_cntr = mxcmci_readl(host, MMC_REG_INT_CNTR); 921f441b993SDaniel Mack 922f441b993SDaniel Mack if (enable) 923f441b993SDaniel Mack int_cntr |= INT_SDIO_IRQ_EN; 924f441b993SDaniel Mack else 925f441b993SDaniel Mack int_cntr &= ~INT_SDIO_IRQ_EN; 926f441b993SDaniel Mack 927c7ceab02SAnatolij Gustschin mxcmci_writel(host, int_cntr, MMC_REG_INT_CNTR); 928f441b993SDaniel Mack spin_unlock_irqrestore(&host->lock, flags); 929f441b993SDaniel Mack } 930d96be879SSascha Hauer 9313fcb027dSDaniel Mack static void mxcmci_init_card(struct mmc_host *host, struct mmc_card *card) 9323fcb027dSDaniel Mack { 9337f917a8dSShawn Guo struct mxcmci_host *mxcmci = mmc_priv(host); 9347f917a8dSShawn Guo 9353fcb027dSDaniel Mack /* 9363fcb027dSDaniel Mack * MX3 SoCs have a silicon bug which corrupts CRC calculation of 9373fcb027dSDaniel Mack * multi-block transfers when connected SDIO peripheral doesn't 9383fcb027dSDaniel Mack * drive the BUSY line as required by the specs. 9393fcb027dSDaniel Mack * One way to prevent this is to only allow 1-bit transfers. 9403fcb027dSDaniel Mack */ 9413fcb027dSDaniel Mack 9427f917a8dSShawn Guo if (is_imx31_mmc(mxcmci) && card->type == MMC_TYPE_SDIO) 9433fcb027dSDaniel Mack host->caps &= ~MMC_CAP_4_BIT_DATA; 9443fcb027dSDaniel Mack else 9453fcb027dSDaniel Mack host->caps |= MMC_CAP_4_BIT_DATA; 9463fcb027dSDaniel Mack } 9473fcb027dSDaniel Mack 948f53fbde4SSascha Hauer static bool filter(struct dma_chan *chan, void *param) 949f53fbde4SSascha Hauer { 950f53fbde4SSascha Hauer struct mxcmci_host *host = param; 951f53fbde4SSascha Hauer 952f53fbde4SSascha Hauer if (!imx_dma_is_general_purpose(chan)) 953f53fbde4SSascha Hauer return false; 954f53fbde4SSascha Hauer 955f53fbde4SSascha Hauer chan->private = &host->dma_data; 956f53fbde4SSascha Hauer 957f53fbde4SSascha Hauer return true; 958f53fbde4SSascha Hauer } 959f53fbde4SSascha Hauer 9602ee4f620SKees Cook static void mxcmci_watchdog(struct timer_list *t) 961f6ad0a48SJavier Martin { 9622ee4f620SKees Cook struct mxcmci_host *host = from_timer(host, t, watchdog); 963f6ad0a48SJavier Martin struct mmc_request *req = host->req; 964c7ceab02SAnatolij Gustschin unsigned int stat = mxcmci_readl(host, MMC_REG_STATUS); 965f6ad0a48SJavier Martin 966f6ad0a48SJavier Martin if (host->dma_dir == DMA_FROM_DEVICE) { 967f6ad0a48SJavier Martin dmaengine_terminate_all(host->dma); 968f6ad0a48SJavier Martin dev_err(mmc_dev(host->mmc), 969f6ad0a48SJavier Martin "%s: read time out (status = 0x%08x)\n", 970f6ad0a48SJavier Martin __func__, stat); 971f6ad0a48SJavier Martin } else { 972f6ad0a48SJavier Martin dev_err(mmc_dev(host->mmc), 973f6ad0a48SJavier Martin "%s: write time out (status = 0x%08x)\n", 974f6ad0a48SJavier Martin __func__, stat); 975f6ad0a48SJavier Martin mxcmci_softreset(host); 976f6ad0a48SJavier Martin } 977f6ad0a48SJavier Martin 978f6ad0a48SJavier Martin /* Mark transfer as erroneus and inform the upper layers */ 979f6ad0a48SJavier Martin 98070aa6109SAnatolij Gustschin if (host->data) 981f6ad0a48SJavier Martin host->data->error = -ETIMEDOUT; 982f6ad0a48SJavier Martin host->req = NULL; 983f6ad0a48SJavier Martin host->cmd = NULL; 984f6ad0a48SJavier Martin host->data = NULL; 985f6ad0a48SJavier Martin mmc_request_done(host->mmc, req); 986f6ad0a48SJavier Martin } 987f6ad0a48SJavier Martin 988d96be879SSascha Hauer static const struct mmc_host_ops mxcmci_ops = { 989d96be879SSascha Hauer .request = mxcmci_request, 990d96be879SSascha Hauer .set_ios = mxcmci_set_ios, 991d96be879SSascha Hauer .get_ro = mxcmci_get_ro, 992f441b993SDaniel Mack .enable_sdio_irq = mxcmci_enable_sdio_irq, 9933fcb027dSDaniel Mack .init_card = mxcmci_init_card, 994d96be879SSascha Hauer }; 995d96be879SSascha Hauer 996d96be879SSascha Hauer static int mxcmci_probe(struct platform_device *pdev) 997d96be879SSascha Hauer { 998d96be879SSascha Hauer struct mmc_host *mmc; 99901e4f958SAlexander Shiyan struct mxcmci_host *host; 100001e4f958SAlexander Shiyan struct resource *res; 1001d96be879SSascha Hauer int ret = 0, irq; 10027ff747c4SMarkus Pargmann bool dat3_card_detect = false; 1003f53fbde4SSascha Hauer dma_cap_mask_t mask; 10047ff747c4SMarkus Pargmann const struct of_device_id *of_id; 10057ff747c4SMarkus Pargmann struct imxmmc_platform_data *pdata = pdev->dev.platform_data; 1006d96be879SSascha Hauer 1007c7ceab02SAnatolij Gustschin pr_info("i.MX/MPC512x SDHC driver\n"); 1008d96be879SSascha Hauer 10097ff747c4SMarkus Pargmann of_id = of_match_device(mxcmci_of_match, &pdev->dev); 10107ff747c4SMarkus Pargmann 101101e4f958SAlexander Shiyan res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 1012d96be879SSascha Hauer irq = platform_get_irq(pdev, 0); 1013f216c124SGustavo A. R. Silva if (irq < 0) { 1014f216c124SGustavo A. R. Silva dev_err(&pdev->dev, "failed to get IRQ: %d\n", irq); 1015f216c124SGustavo A. R. Silva return irq; 1016f216c124SGustavo A. R. Silva } 1017d96be879SSascha Hauer 101801e4f958SAlexander Shiyan mmc = mmc_alloc_host(sizeof(*host), &pdev->dev); 101901e4f958SAlexander Shiyan if (!mmc) 102001e4f958SAlexander Shiyan return -ENOMEM; 1021d96be879SSascha Hauer 102201e4f958SAlexander Shiyan host = mmc_priv(mmc); 102301e4f958SAlexander Shiyan 102401e4f958SAlexander Shiyan host->base = devm_ioremap_resource(&pdev->dev, res); 102501e4f958SAlexander Shiyan if (IS_ERR(host->base)) { 102601e4f958SAlexander Shiyan ret = PTR_ERR(host->base); 102701e4f958SAlexander Shiyan goto out_free; 1028d96be879SSascha Hauer } 1029d96be879SSascha Hauer 103001e4f958SAlexander Shiyan host->phys_base = res->start; 103101e4f958SAlexander Shiyan 1032b8857696SSimon Baatz ret = mmc_of_parse(mmc); 1033b8857696SSimon Baatz if (ret) 1034b8857696SSimon Baatz goto out_free; 1035d96be879SSascha Hauer mmc->ops = &mxcmci_ops; 10367ff747c4SMarkus Pargmann 10377ff747c4SMarkus Pargmann /* For devicetree parsing, the bus width is read from devicetree */ 10387ff747c4SMarkus Pargmann if (pdata) 1039f441b993SDaniel Mack mmc->caps = MMC_CAP_4_BIT_DATA | MMC_CAP_SDIO_IRQ; 10407ff747c4SMarkus Pargmann else 10417ff747c4SMarkus Pargmann mmc->caps |= MMC_CAP_SDIO_IRQ; 1042d96be879SSascha Hauer 1043d96be879SSascha Hauer /* MMC core transfer sizes tunable parameters */ 1044d96be879SSascha Hauer mmc->max_blk_size = 2048; 1045d96be879SSascha Hauer mmc->max_blk_count = 65535; 1046d96be879SSascha Hauer mmc->max_req_size = mmc->max_blk_size * mmc->max_blk_count; 1047d759c374SVladimir Zapolskiy mmc->max_seg_size = mmc->max_req_size; 1048d96be879SSascha Hauer 10497ff747c4SMarkus Pargmann if (of_id) { 10507ff747c4SMarkus Pargmann const struct platform_device_id *id_entry = of_id->data; 10517ff747c4SMarkus Pargmann host->devtype = id_entry->driver_data; 10527ff747c4SMarkus Pargmann } else { 10537f917a8dSShawn Guo host->devtype = pdev->id_entry->driver_data; 10547ff747c4SMarkus Pargmann } 1055e48fc15aSAnatolij Gustschin 1056e48fc15aSAnatolij Gustschin /* adjust max_segs after devtype detection */ 1057e48fc15aSAnatolij Gustschin if (!is_mpc512x_mmc(host)) 1058e48fc15aSAnatolij Gustschin mmc->max_segs = 64; 1059e48fc15aSAnatolij Gustschin 10607ff747c4SMarkus Pargmann host->mmc = mmc; 10617ff747c4SMarkus Pargmann host->pdata = pdata; 1062f441b993SDaniel Mack spin_lock_init(&host->lock); 1063d96be879SSascha Hauer 10647ff747c4SMarkus Pargmann if (pdata) 10657ff747c4SMarkus Pargmann dat3_card_detect = pdata->dat3_card_detect; 1066860951c5SJaehoon Chung else if (mmc_card_is_removable(mmc) 10677ff747c4SMarkus Pargmann && !of_property_read_bool(pdev->dev.of_node, "cd-gpios")) 10687ff747c4SMarkus Pargmann dat3_card_detect = true; 10697ff747c4SMarkus Pargmann 1070bc3c1771SAlexander Shiyan ret = mmc_regulator_get_supply(mmc); 1071337d7c8aSWolfram Sang if (ret) 1072bc3c1771SAlexander Shiyan goto out_free; 107318a09806SMatteo Facchinetti 107418a09806SMatteo Facchinetti if (!mmc->ocr_avail) { 107518a09806SMatteo Facchinetti if (pdata && pdata->ocr_avail) 107618a09806SMatteo Facchinetti mmc->ocr_avail = pdata->ocr_avail; 107718a09806SMatteo Facchinetti else 107818a09806SMatteo Facchinetti mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34; 1079bc3c1771SAlexander Shiyan } 1080d96be879SSascha Hauer 10817ff747c4SMarkus Pargmann if (dat3_card_detect) 108216b3bf8cSEric Bénard host->default_irq_mask = 108316b3bf8cSEric Bénard INT_CARD_INSERTION_EN | INT_CARD_REMOVAL_EN; 108416b3bf8cSEric Bénard else 108516b3bf8cSEric Bénard host->default_irq_mask = 0; 108616b3bf8cSEric Bénard 1087529aa29eSSascha Hauer host->clk_ipg = devm_clk_get(&pdev->dev, "ipg"); 1088529aa29eSSascha Hauer if (IS_ERR(host->clk_ipg)) { 1089529aa29eSSascha Hauer ret = PTR_ERR(host->clk_ipg); 109001e4f958SAlexander Shiyan goto out_free; 1091d96be879SSascha Hauer } 1092529aa29eSSascha Hauer 1093529aa29eSSascha Hauer host->clk_per = devm_clk_get(&pdev->dev, "per"); 1094529aa29eSSascha Hauer if (IS_ERR(host->clk_per)) { 1095529aa29eSSascha Hauer ret = PTR_ERR(host->clk_per); 109601e4f958SAlexander Shiyan goto out_free; 1097529aa29eSSascha Hauer } 1098529aa29eSSascha Hauer 1099a2bc74cfSArvind Yadav ret = clk_prepare_enable(host->clk_per); 1100a2bc74cfSArvind Yadav if (ret) 1101a2bc74cfSArvind Yadav goto out_free; 1102a2bc74cfSArvind Yadav 1103a2bc74cfSArvind Yadav ret = clk_prepare_enable(host->clk_ipg); 1104a2bc74cfSArvind Yadav if (ret) 1105a2bc74cfSArvind Yadav goto out_clk_per_put; 1106d96be879SSascha Hauer 1107d96be879SSascha Hauer mxcmci_softreset(host); 1108d96be879SSascha Hauer 1109c7ceab02SAnatolij Gustschin host->rev_no = mxcmci_readw(host, MMC_REG_REV_NO); 1110d96be879SSascha Hauer if (host->rev_no != 0x400) { 1111d96be879SSascha Hauer ret = -ENODEV; 1112d96be879SSascha Hauer dev_err(mmc_dev(host->mmc), "wrong rev.no. 0x%08x. aborting.\n", 1113d96be879SSascha Hauer host->rev_no); 1114d96be879SSascha Hauer goto out_clk_put; 1115d96be879SSascha Hauer } 1116d96be879SSascha Hauer 1117529aa29eSSascha Hauer mmc->f_min = clk_get_rate(host->clk_per) >> 16; 1118529aa29eSSascha Hauer mmc->f_max = clk_get_rate(host->clk_per) >> 1; 1119d96be879SSascha Hauer 1120d96be879SSascha Hauer /* recommended in data sheet */ 1121c7ceab02SAnatolij Gustschin mxcmci_writew(host, 0x2db4, MMC_REG_READ_TO); 1122d96be879SSascha Hauer 1123c7ceab02SAnatolij Gustschin mxcmci_writel(host, host->default_irq_mask, MMC_REG_INT_CNTR); 1124d96be879SSascha Hauer 11257ff747c4SMarkus Pargmann if (!host->pdata) { 11267ff747c4SMarkus Pargmann host->dma = dma_request_slave_channel(&pdev->dev, "rx-tx"); 11277ff747c4SMarkus Pargmann } else { 112801e4f958SAlexander Shiyan res = platform_get_resource(pdev, IORESOURCE_DMA, 0); 112901e4f958SAlexander Shiyan if (res) { 113001e4f958SAlexander Shiyan host->dmareq = res->start; 1131f53fbde4SSascha Hauer host->dma_data.peripheral_type = IMX_DMATYPE_SDHC; 1132f53fbde4SSascha Hauer host->dma_data.priority = DMA_PRIO_LOW; 1133f53fbde4SSascha Hauer host->dma_data.dma_request = host->dmareq; 1134f53fbde4SSascha Hauer dma_cap_zero(mask); 1135f53fbde4SSascha Hauer dma_cap_set(DMA_SLAVE, mask); 1136f53fbde4SSascha Hauer host->dma = dma_request_channel(mask, filter, host); 11377ff747c4SMarkus Pargmann } 11387ff747c4SMarkus Pargmann } 1139f53fbde4SSascha Hauer if (host->dma) 1140f53fbde4SSascha Hauer mmc->max_seg_size = dma_get_max_seg_size( 1141f53fbde4SSascha Hauer host->dma->device->dev); 11427ff747c4SMarkus Pargmann else 1143f53fbde4SSascha Hauer dev_info(mmc_dev(host->mmc), "dma not available. Using PIO\n"); 1144f53fbde4SSascha Hauer 1145d96be879SSascha Hauer INIT_WORK(&host->datawork, mxcmci_datawork); 1146d96be879SSascha Hauer 114701e4f958SAlexander Shiyan ret = devm_request_irq(&pdev->dev, irq, mxcmci_irq, 0, 114801e4f958SAlexander Shiyan dev_name(&pdev->dev), host); 1149d96be879SSascha Hauer if (ret) 1150d96be879SSascha Hauer goto out_free_dma; 1151d96be879SSascha Hauer 1152d96be879SSascha Hauer platform_set_drvdata(pdev, mmc); 1153d96be879SSascha Hauer 1154d96be879SSascha Hauer if (host->pdata && host->pdata->init) { 1155d96be879SSascha Hauer ret = host->pdata->init(&pdev->dev, mxcmci_detect_irq, 1156d96be879SSascha Hauer host->mmc); 1157d96be879SSascha Hauer if (ret) 115801e4f958SAlexander Shiyan goto out_free_dma; 1159d96be879SSascha Hauer } 1160d96be879SSascha Hauer 11612ee4f620SKees Cook timer_setup(&host->watchdog, mxcmci_watchdog, 0); 1162f6ad0a48SJavier Martin 1163abd4190fSAlexander Shiyan mmc_add_host(mmc); 1164abd4190fSAlexander Shiyan 1165d96be879SSascha Hauer return 0; 1166d96be879SSascha Hauer 1167d96be879SSascha Hauer out_free_dma: 1168f53fbde4SSascha Hauer if (host->dma) 1169f53fbde4SSascha Hauer dma_release_channel(host->dma); 117001e4f958SAlexander Shiyan 1171d96be879SSascha Hauer out_clk_put: 1172529aa29eSSascha Hauer clk_disable_unprepare(host->clk_ipg); 1173a2bc74cfSArvind Yadav out_clk_per_put: 1174a2bc74cfSArvind Yadav clk_disable_unprepare(host->clk_per); 117501e4f958SAlexander Shiyan 1176d96be879SSascha Hauer out_free: 1177d96be879SSascha Hauer mmc_free_host(mmc); 117801e4f958SAlexander Shiyan 1179d96be879SSascha Hauer return ret; 1180d96be879SSascha Hauer } 1181d96be879SSascha Hauer 1182d96be879SSascha Hauer static int mxcmci_remove(struct platform_device *pdev) 1183d96be879SSascha Hauer { 1184d96be879SSascha Hauer struct mmc_host *mmc = platform_get_drvdata(pdev); 1185d96be879SSascha Hauer struct mxcmci_host *host = mmc_priv(mmc); 1186d96be879SSascha Hauer 1187d96be879SSascha Hauer mmc_remove_host(mmc); 1188d96be879SSascha Hauer 1189d96be879SSascha Hauer if (host->pdata && host->pdata->exit) 1190d96be879SSascha Hauer host->pdata->exit(&pdev->dev, mmc); 1191d96be879SSascha Hauer 1192f53fbde4SSascha Hauer if (host->dma) 1193f53fbde4SSascha Hauer dma_release_channel(host->dma); 1194f53fbde4SSascha Hauer 1195529aa29eSSascha Hauer clk_disable_unprepare(host->clk_per); 1196529aa29eSSascha Hauer clk_disable_unprepare(host->clk_ipg); 1197d96be879SSascha Hauer 1198d96be879SSascha Hauer mmc_free_host(mmc); 1199d96be879SSascha Hauer 1200d96be879SSascha Hauer return 0; 1201d96be879SSascha Hauer } 1202d96be879SSascha Hauer 1203d8edfc4eSUlf Hansson #ifdef CONFIG_PM_SLEEP 1204d8edfc4eSUlf Hansson static int mxcmci_suspend(struct device *dev) 1205d96be879SSascha Hauer { 1206a7d403cfSEric Bénard struct mmc_host *mmc = dev_get_drvdata(dev); 1207a7d403cfSEric Bénard struct mxcmci_host *host = mmc_priv(mmc); 1208d96be879SSascha Hauer 1209529aa29eSSascha Hauer clk_disable_unprepare(host->clk_per); 1210529aa29eSSascha Hauer clk_disable_unprepare(host->clk_ipg); 1211bd190f90SUlf Hansson return 0; 1212d96be879SSascha Hauer } 1213d96be879SSascha Hauer 1214d8edfc4eSUlf Hansson static int mxcmci_resume(struct device *dev) 1215d96be879SSascha Hauer { 1216a7d403cfSEric Bénard struct mmc_host *mmc = dev_get_drvdata(dev); 1217a7d403cfSEric Bénard struct mxcmci_host *host = mmc_priv(mmc); 1218a2bc74cfSArvind Yadav int ret; 1219d96be879SSascha Hauer 1220a2bc74cfSArvind Yadav ret = clk_prepare_enable(host->clk_per); 1221a2bc74cfSArvind Yadav if (ret) 1222a2bc74cfSArvind Yadav return ret; 1223a2bc74cfSArvind Yadav 1224a2bc74cfSArvind Yadav ret = clk_prepare_enable(host->clk_ipg); 1225a2bc74cfSArvind Yadav if (ret) 1226a2bc74cfSArvind Yadav clk_disable_unprepare(host->clk_per); 1227a2bc74cfSArvind Yadav 1228a2bc74cfSArvind Yadav return ret; 1229d96be879SSascha Hauer } 1230d8edfc4eSUlf Hansson #endif 1231a7d403cfSEric Bénard 1232384a81d5SAlexander Shiyan static SIMPLE_DEV_PM_OPS(mxcmci_pm_ops, mxcmci_suspend, mxcmci_resume); 1233d96be879SSascha Hauer 1234d96be879SSascha Hauer static struct platform_driver mxcmci_driver = { 1235d96be879SSascha Hauer .probe = mxcmci_probe, 1236d96be879SSascha Hauer .remove = mxcmci_remove, 12377f917a8dSShawn Guo .id_table = mxcmci_devtype, 1238d96be879SSascha Hauer .driver = { 1239d96be879SSascha Hauer .name = DRIVER_NAME, 1240a7d403cfSEric Bénard .pm = &mxcmci_pm_ops, 12417ff747c4SMarkus Pargmann .of_match_table = mxcmci_of_match, 1242d96be879SSascha Hauer } 1243d96be879SSascha Hauer }; 1244d96be879SSascha Hauer 1245d1f81a64SAxel Lin module_platform_driver(mxcmci_driver); 1246d96be879SSascha Hauer 1247d96be879SSascha Hauer MODULE_DESCRIPTION("i.MX Multimedia Card Interface Driver"); 1248d96be879SSascha Hauer MODULE_AUTHOR("Sascha Hauer, Pengutronix"); 1249d96be879SSascha Hauer MODULE_LICENSE("GPL"); 12506eb30adfSFabio Estevam MODULE_ALIAS("platform:mxc-mmc"); 1251