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> 41bcf53524SAnatolij Gustschin #include <linux/mmc/slot-gpio.h> 42d96be879SSascha Hauer 43d96be879SSascha Hauer #include <asm/dma.h> 44d96be879SSascha Hauer #include <asm/irq.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, 122c7ceab02SAnatolij Gustschin MPC512X_MMC, 1237f917a8dSShawn Guo }; 1247f917a8dSShawn Guo 125d96be879SSascha Hauer struct mxcmci_host { 126d96be879SSascha Hauer struct mmc_host *mmc; 127d96be879SSascha Hauer void __iomem *base; 12801e4f958SAlexander Shiyan dma_addr_t phys_base; 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 156f53fbde4SSascha Hauer int burstlen; 157f53fbde4SSascha Hauer int dmareq; 158f53fbde4SSascha Hauer struct dma_slave_config dma_slave_config; 159f53fbde4SSascha Hauer struct imx_dma_data dma_data; 160f6ad0a48SJavier Martin 161f6ad0a48SJavier Martin struct timer_list watchdog; 1627f917a8dSShawn Guo enum mxcmci_type devtype; 163d96be879SSascha Hauer }; 164d96be879SSascha Hauer 16542477053SAnatolij Gustschin static const struct platform_device_id mxcmci_devtype[] = { 1667f917a8dSShawn Guo { 1677f917a8dSShawn Guo .name = "imx21-mmc", 1687f917a8dSShawn Guo .driver_data = IMX21_MMC, 1697f917a8dSShawn Guo }, { 1707f917a8dSShawn Guo .name = "imx31-mmc", 1717f917a8dSShawn Guo .driver_data = IMX31_MMC, 1727f917a8dSShawn Guo }, { 173c7ceab02SAnatolij Gustschin .name = "mpc512x-sdhc", 174c7ceab02SAnatolij Gustschin .driver_data = MPC512X_MMC, 175c7ceab02SAnatolij Gustschin }, { 1767f917a8dSShawn Guo /* sentinel */ 1777f917a8dSShawn Guo } 1787f917a8dSShawn Guo }; 1797f917a8dSShawn Guo MODULE_DEVICE_TABLE(platform, mxcmci_devtype); 1807f917a8dSShawn Guo 1817ff747c4SMarkus Pargmann static const struct of_device_id mxcmci_of_match[] = { 1827ff747c4SMarkus Pargmann { 1837ff747c4SMarkus Pargmann .compatible = "fsl,imx21-mmc", 1847ff747c4SMarkus Pargmann .data = &mxcmci_devtype[IMX21_MMC], 1857ff747c4SMarkus Pargmann }, { 1867ff747c4SMarkus Pargmann .compatible = "fsl,imx31-mmc", 1877ff747c4SMarkus Pargmann .data = &mxcmci_devtype[IMX31_MMC], 1887ff747c4SMarkus Pargmann }, { 189c7ceab02SAnatolij Gustschin .compatible = "fsl,mpc5121-sdhc", 190c7ceab02SAnatolij Gustschin .data = &mxcmci_devtype[MPC512X_MMC], 191c7ceab02SAnatolij Gustschin }, { 1927ff747c4SMarkus Pargmann /* sentinel */ 1937ff747c4SMarkus Pargmann } 1947ff747c4SMarkus Pargmann }; 1957ff747c4SMarkus Pargmann MODULE_DEVICE_TABLE(of, mxcmci_of_match); 1967ff747c4SMarkus Pargmann 1977f917a8dSShawn Guo static inline int is_imx31_mmc(struct mxcmci_host *host) 1987f917a8dSShawn Guo { 1997f917a8dSShawn Guo return host->devtype == IMX31_MMC; 2007f917a8dSShawn Guo } 2017f917a8dSShawn Guo 202c7ceab02SAnatolij Gustschin static inline int is_mpc512x_mmc(struct mxcmci_host *host) 203c7ceab02SAnatolij Gustschin { 204c7ceab02SAnatolij Gustschin return host->devtype == MPC512X_MMC; 205c7ceab02SAnatolij Gustschin } 206c7ceab02SAnatolij Gustschin 207c7ceab02SAnatolij Gustschin static inline u32 mxcmci_readl(struct mxcmci_host *host, int reg) 208c7ceab02SAnatolij Gustschin { 209c7ceab02SAnatolij Gustschin if (IS_ENABLED(CONFIG_PPC_MPC512x)) 210c7ceab02SAnatolij Gustschin return ioread32be(host->base + reg); 211c7ceab02SAnatolij Gustschin else 212c7ceab02SAnatolij Gustschin return readl(host->base + reg); 213c7ceab02SAnatolij Gustschin } 214c7ceab02SAnatolij Gustschin 215c7ceab02SAnatolij Gustschin static inline void mxcmci_writel(struct mxcmci_host *host, u32 val, int reg) 216c7ceab02SAnatolij Gustschin { 217c7ceab02SAnatolij Gustschin if (IS_ENABLED(CONFIG_PPC_MPC512x)) 218c7ceab02SAnatolij Gustschin iowrite32be(val, host->base + reg); 219c7ceab02SAnatolij Gustschin else 220c7ceab02SAnatolij Gustschin writel(val, host->base + reg); 221c7ceab02SAnatolij Gustschin } 222c7ceab02SAnatolij Gustschin 223c7ceab02SAnatolij Gustschin static inline u16 mxcmci_readw(struct mxcmci_host *host, int reg) 224c7ceab02SAnatolij Gustschin { 225c7ceab02SAnatolij Gustschin if (IS_ENABLED(CONFIG_PPC_MPC512x)) 226c7ceab02SAnatolij Gustschin return ioread32be(host->base + reg); 227c7ceab02SAnatolij Gustschin else 228c7ceab02SAnatolij Gustschin return readw(host->base + reg); 229c7ceab02SAnatolij Gustschin } 230c7ceab02SAnatolij Gustschin 231c7ceab02SAnatolij Gustschin static inline void mxcmci_writew(struct mxcmci_host *host, u16 val, int reg) 232c7ceab02SAnatolij Gustschin { 233c7ceab02SAnatolij Gustschin if (IS_ENABLED(CONFIG_PPC_MPC512x)) 234c7ceab02SAnatolij Gustschin iowrite32be(val, host->base + reg); 235c7ceab02SAnatolij Gustschin else 236c7ceab02SAnatolij Gustschin writew(val, host->base + reg); 237c7ceab02SAnatolij Gustschin } 238c7ceab02SAnatolij Gustschin 23918489fa2SMartin Fuzzey static void mxcmci_set_clk_rate(struct mxcmci_host *host, unsigned int clk_ios); 24018489fa2SMartin Fuzzey 241bc3c1771SAlexander Shiyan static void mxcmci_set_power(struct mxcmci_host *host, unsigned int vdd) 24274b66954SAlberto Panizzo { 243bc3c1771SAlexander Shiyan if (!IS_ERR(host->mmc->supply.vmmc)) { 244bc3c1771SAlexander Shiyan if (host->power_mode == MMC_POWER_UP) 245bc3c1771SAlexander Shiyan mmc_regulator_set_ocr(host->mmc, 246bc3c1771SAlexander Shiyan host->mmc->supply.vmmc, vdd); 247bc3c1771SAlexander Shiyan else if (host->power_mode == MMC_POWER_OFF) 248bc3c1771SAlexander Shiyan mmc_regulator_set_ocr(host->mmc, 249bc3c1771SAlexander Shiyan host->mmc->supply.vmmc, 0); 250d078d242SAlberto Panizzo } 251d078d242SAlberto Panizzo 25274b66954SAlberto Panizzo if (host->pdata && host->pdata->setpower) 25374b66954SAlberto Panizzo host->pdata->setpower(mmc_dev(host->mmc), vdd); 25474b66954SAlberto Panizzo } 25574b66954SAlberto Panizzo 256d96be879SSascha Hauer static inline int mxcmci_use_dma(struct mxcmci_host *host) 257d96be879SSascha Hauer { 258d96be879SSascha Hauer return host->do_dma; 259d96be879SSascha Hauer } 260d96be879SSascha Hauer 261d96be879SSascha Hauer static void mxcmci_softreset(struct mxcmci_host *host) 262d96be879SSascha Hauer { 263d96be879SSascha Hauer int i; 264d96be879SSascha Hauer 2654725f6f1SDaniel Mack dev_dbg(mmc_dev(host->mmc), "mxcmci_softreset\n"); 2664725f6f1SDaniel Mack 267d96be879SSascha Hauer /* reset sequence */ 268c7ceab02SAnatolij Gustschin mxcmci_writew(host, STR_STP_CLK_RESET, MMC_REG_STR_STP_CLK); 269c7ceab02SAnatolij Gustschin mxcmci_writew(host, STR_STP_CLK_RESET | STR_STP_CLK_START_CLK, 270c7ceab02SAnatolij Gustschin MMC_REG_STR_STP_CLK); 271d96be879SSascha Hauer 272d96be879SSascha Hauer for (i = 0; i < 8; i++) 273c7ceab02SAnatolij Gustschin mxcmci_writew(host, STR_STP_CLK_START_CLK, MMC_REG_STR_STP_CLK); 274d96be879SSascha Hauer 275c7ceab02SAnatolij Gustschin mxcmci_writew(host, 0xff, MMC_REG_RES_TO); 276d96be879SSascha Hauer } 277d96be879SSascha Hauer 278e48fc15aSAnatolij Gustschin #if IS_ENABLED(CONFIG_PPC_MPC512x) 279e48fc15aSAnatolij Gustschin static inline void buffer_swap32(u32 *buf, int len) 280e48fc15aSAnatolij Gustschin { 281e48fc15aSAnatolij Gustschin int i; 282e48fc15aSAnatolij Gustschin 283e48fc15aSAnatolij Gustschin for (i = 0; i < ((len + 3) / 4); i++) { 2847a8bf874SDavid Gibson *buf = swab32(*buf); 285e48fc15aSAnatolij Gustschin buf++; 286e48fc15aSAnatolij Gustschin } 287e48fc15aSAnatolij Gustschin } 288e48fc15aSAnatolij Gustschin 289e48fc15aSAnatolij Gustschin static void mxcmci_swap_buffers(struct mmc_data *data) 290e48fc15aSAnatolij Gustschin { 291e48fc15aSAnatolij Gustschin struct scatterlist *sg; 292e48fc15aSAnatolij Gustschin int i; 293e48fc15aSAnatolij Gustschin 294e48fc15aSAnatolij Gustschin for_each_sg(data->sg, sg, data->sg_len, i) 295e48fc15aSAnatolij Gustschin buffer_swap32(sg_virt(sg), sg->length); 296e48fc15aSAnatolij Gustschin } 297e48fc15aSAnatolij Gustschin #else 298e48fc15aSAnatolij Gustschin static inline void mxcmci_swap_buffers(struct mmc_data *data) {} 299e48fc15aSAnatolij Gustschin #endif 300e48fc15aSAnatolij Gustschin 301656217d2SMartin Fuzzey static int mxcmci_setup_data(struct mxcmci_host *host, struct mmc_data *data) 302d96be879SSascha Hauer { 303d96be879SSascha Hauer unsigned int nob = data->blocks; 304d96be879SSascha Hauer unsigned int blksz = data->blksz; 305d96be879SSascha Hauer unsigned int datasize = nob * blksz; 306d96be879SSascha Hauer struct scatterlist *sg; 30705f5799cSVinod Koul enum dma_transfer_direction slave_dirn; 308f53fbde4SSascha Hauer int i, nents; 309f53fbde4SSascha Hauer 310d96be879SSascha Hauer host->data = data; 311d96be879SSascha Hauer data->bytes_xfered = 0; 312d96be879SSascha Hauer 313c7ceab02SAnatolij Gustschin mxcmci_writew(host, nob, MMC_REG_NOB); 314c7ceab02SAnatolij Gustschin mxcmci_writew(host, blksz, MMC_REG_BLK_LEN); 315d96be879SSascha Hauer host->datasize = datasize; 316d96be879SSascha Hauer 317f53fbde4SSascha Hauer if (!mxcmci_use_dma(host)) 318f53fbde4SSascha Hauer return 0; 319f53fbde4SSascha Hauer 320d96be879SSascha Hauer for_each_sg(data->sg, sg, data->sg_len, i) { 3212cb53552SJavier Martin if (sg->offset & 3 || sg->length & 3 || sg->length < 512) { 322d96be879SSascha Hauer host->do_dma = 0; 323656217d2SMartin Fuzzey return 0; 324d96be879SSascha Hauer } 325d96be879SSascha Hauer } 326d96be879SSascha Hauer 32705f5799cSVinod Koul if (data->flags & MMC_DATA_READ) { 328d96be879SSascha Hauer host->dma_dir = DMA_FROM_DEVICE; 32905f5799cSVinod Koul slave_dirn = DMA_DEV_TO_MEM; 33005f5799cSVinod Koul } else { 331d96be879SSascha Hauer host->dma_dir = DMA_TO_DEVICE; 33205f5799cSVinod Koul slave_dirn = DMA_MEM_TO_DEV; 333e48fc15aSAnatolij Gustschin 334e48fc15aSAnatolij Gustschin mxcmci_swap_buffers(data); 33505f5799cSVinod Koul } 336f53fbde4SSascha Hauer 337f53fbde4SSascha Hauer nents = dma_map_sg(host->dma->device->dev, data->sg, 338d96be879SSascha Hauer data->sg_len, host->dma_dir); 339f53fbde4SSascha Hauer if (nents != data->sg_len) 340f53fbde4SSascha Hauer return -EINVAL; 341d96be879SSascha Hauer 34216052827SAlexandre Bounine host->desc = dmaengine_prep_slave_sg(host->dma, 34305f5799cSVinod Koul data->sg, data->sg_len, slave_dirn, 344f53fbde4SSascha Hauer DMA_PREP_INTERRUPT | DMA_CTRL_ACK); 345d96be879SSascha Hauer 346f53fbde4SSascha Hauer if (!host->desc) { 347f53fbde4SSascha Hauer dma_unmap_sg(host->dma->device->dev, data->sg, data->sg_len, 348f53fbde4SSascha Hauer host->dma_dir); 349f53fbde4SSascha Hauer host->do_dma = 0; 350f53fbde4SSascha Hauer return 0; /* Fall back to PIO */ 351656217d2SMartin Fuzzey } 352d96be879SSascha Hauer wmb(); 353d96be879SSascha Hauer 354f53fbde4SSascha Hauer dmaengine_submit(host->desc); 355439aa0efSSascha Hauer dma_async_issue_pending(host->dma); 356f53fbde4SSascha Hauer 357f6ad0a48SJavier Martin mod_timer(&host->watchdog, jiffies + msecs_to_jiffies(MXCMCI_TIMEOUT_MS)); 358f6ad0a48SJavier Martin 359656217d2SMartin Fuzzey return 0; 360d96be879SSascha Hauer } 361d96be879SSascha Hauer 362f6ad0a48SJavier Martin static void mxcmci_cmd_done(struct mxcmci_host *host, unsigned int stat); 363f6ad0a48SJavier Martin static void mxcmci_data_done(struct mxcmci_host *host, unsigned int stat); 364f6ad0a48SJavier Martin 365f6ad0a48SJavier Martin static void mxcmci_dma_callback(void *data) 366f6ad0a48SJavier Martin { 367f6ad0a48SJavier Martin struct mxcmci_host *host = data; 368f6ad0a48SJavier Martin u32 stat; 369f6ad0a48SJavier Martin 370f6ad0a48SJavier Martin del_timer(&host->watchdog); 371f6ad0a48SJavier Martin 372c7ceab02SAnatolij Gustschin stat = mxcmci_readl(host, MMC_REG_STATUS); 373f6ad0a48SJavier Martin 374f6ad0a48SJavier Martin dev_dbg(mmc_dev(host->mmc), "%s: 0x%08x\n", __func__, stat); 375f6ad0a48SJavier Martin 376f6ad0a48SJavier Martin mxcmci_data_done(host, stat); 377f6ad0a48SJavier Martin } 378f6ad0a48SJavier Martin 379d96be879SSascha Hauer static int mxcmci_start_cmd(struct mxcmci_host *host, struct mmc_command *cmd, 380d96be879SSascha Hauer unsigned int cmdat) 381d96be879SSascha Hauer { 38216b3bf8cSEric Bénard u32 int_cntr = host->default_irq_mask; 383f441b993SDaniel Mack unsigned long flags; 384f441b993SDaniel Mack 385d96be879SSascha Hauer WARN_ON(host->cmd != NULL); 386d96be879SSascha Hauer host->cmd = cmd; 387d96be879SSascha Hauer 388d96be879SSascha Hauer switch (mmc_resp_type(cmd)) { 389d96be879SSascha Hauer case MMC_RSP_R1: /* short CRC, OPCODE */ 390d96be879SSascha Hauer case MMC_RSP_R1B:/* short CRC, OPCODE, BUSY */ 391d96be879SSascha Hauer cmdat |= CMD_DAT_CONT_RESPONSE_48BIT_CRC; 392d96be879SSascha Hauer break; 393d96be879SSascha Hauer case MMC_RSP_R2: /* long 136 bit + CRC */ 394d96be879SSascha Hauer cmdat |= CMD_DAT_CONT_RESPONSE_136BIT; 395d96be879SSascha Hauer break; 396d96be879SSascha Hauer case MMC_RSP_R3: /* short */ 397d96be879SSascha Hauer cmdat |= CMD_DAT_CONT_RESPONSE_48BIT; 398d96be879SSascha Hauer break; 399d96be879SSascha Hauer case MMC_RSP_NONE: 400d96be879SSascha Hauer break; 401d96be879SSascha Hauer default: 402d96be879SSascha Hauer dev_err(mmc_dev(host->mmc), "unhandled response type 0x%x\n", 403d96be879SSascha Hauer mmc_resp_type(cmd)); 404d96be879SSascha Hauer cmd->error = -EINVAL; 405d96be879SSascha Hauer return -EINVAL; 406d96be879SSascha Hauer } 407d96be879SSascha Hauer 408f441b993SDaniel Mack int_cntr = INT_END_CMD_RES_EN; 409f441b993SDaniel Mack 410f6ad0a48SJavier Martin if (mxcmci_use_dma(host)) { 411f6ad0a48SJavier Martin if (host->dma_dir == DMA_FROM_DEVICE) { 412f6ad0a48SJavier Martin host->desc->callback = mxcmci_dma_callback; 413f6ad0a48SJavier Martin host->desc->callback_param = host; 414f6ad0a48SJavier Martin } else { 415f6ad0a48SJavier Martin int_cntr |= INT_WRITE_OP_DONE_EN; 416f6ad0a48SJavier Martin } 417f6ad0a48SJavier Martin } 418f441b993SDaniel Mack 419f441b993SDaniel Mack spin_lock_irqsave(&host->lock, flags); 420f441b993SDaniel Mack if (host->use_sdio) 421f441b993SDaniel Mack int_cntr |= INT_SDIO_IRQ_EN; 422c7ceab02SAnatolij Gustschin mxcmci_writel(host, int_cntr, MMC_REG_INT_CNTR); 423f441b993SDaniel Mack spin_unlock_irqrestore(&host->lock, flags); 424d96be879SSascha Hauer 425c7ceab02SAnatolij Gustschin mxcmci_writew(host, cmd->opcode, MMC_REG_CMD); 426c7ceab02SAnatolij Gustschin mxcmci_writel(host, cmd->arg, MMC_REG_ARG); 427c7ceab02SAnatolij Gustschin mxcmci_writew(host, cmdat, MMC_REG_CMD_DAT_CONT); 428d96be879SSascha Hauer 429d96be879SSascha Hauer return 0; 430d96be879SSascha Hauer } 431d96be879SSascha Hauer 432d96be879SSascha Hauer static void mxcmci_finish_request(struct mxcmci_host *host, 433d96be879SSascha Hauer struct mmc_request *req) 434d96be879SSascha Hauer { 43516b3bf8cSEric Bénard u32 int_cntr = host->default_irq_mask; 436f441b993SDaniel Mack unsigned long flags; 437f441b993SDaniel Mack 438f441b993SDaniel Mack spin_lock_irqsave(&host->lock, flags); 439f441b993SDaniel Mack if (host->use_sdio) 440f441b993SDaniel Mack int_cntr |= INT_SDIO_IRQ_EN; 441c7ceab02SAnatolij Gustschin mxcmci_writel(host, int_cntr, MMC_REG_INT_CNTR); 442f441b993SDaniel Mack spin_unlock_irqrestore(&host->lock, flags); 443d96be879SSascha Hauer 444d96be879SSascha Hauer host->req = NULL; 445d96be879SSascha Hauer host->cmd = NULL; 446d96be879SSascha Hauer host->data = NULL; 447d96be879SSascha Hauer 448d96be879SSascha Hauer mmc_request_done(host->mmc, req); 449d96be879SSascha Hauer } 450d96be879SSascha Hauer 451d96be879SSascha Hauer static int mxcmci_finish_data(struct mxcmci_host *host, unsigned int stat) 452d96be879SSascha Hauer { 453d96be879SSascha Hauer struct mmc_data *data = host->data; 454d96be879SSascha Hauer int data_error; 455d96be879SSascha Hauer 456e48fc15aSAnatolij Gustschin if (mxcmci_use_dma(host)) { 457f53fbde4SSascha Hauer dma_unmap_sg(host->dma->device->dev, data->sg, data->sg_len, 458d96be879SSascha Hauer host->dma_dir); 459e48fc15aSAnatolij Gustschin mxcmci_swap_buffers(data); 460e48fc15aSAnatolij Gustschin } 461d96be879SSascha Hauer 462d96be879SSascha Hauer if (stat & STATUS_ERR_MASK) { 463d96be879SSascha Hauer dev_dbg(mmc_dev(host->mmc), "request failed. status: 0x%08x\n", 464d96be879SSascha Hauer stat); 465d96be879SSascha Hauer if (stat & STATUS_CRC_READ_ERR) { 4664725f6f1SDaniel Mack dev_err(mmc_dev(host->mmc), "%s: -EILSEQ\n", __func__); 467d96be879SSascha Hauer data->error = -EILSEQ; 468d96be879SSascha Hauer } else if (stat & STATUS_CRC_WRITE_ERR) { 469d96be879SSascha Hauer u32 err_code = (stat >> 9) & 0x3; 4704725f6f1SDaniel Mack if (err_code == 2) { /* No CRC response */ 4714725f6f1SDaniel Mack dev_err(mmc_dev(host->mmc), 4724725f6f1SDaniel Mack "%s: No CRC -ETIMEDOUT\n", __func__); 473d96be879SSascha Hauer data->error = -ETIMEDOUT; 474d96be879SSascha Hauer } else { 4754725f6f1SDaniel Mack dev_err(mmc_dev(host->mmc), 4764725f6f1SDaniel Mack "%s: -EILSEQ\n", __func__); 4774725f6f1SDaniel Mack data->error = -EILSEQ; 4784725f6f1SDaniel Mack } 4794725f6f1SDaniel Mack } else if (stat & STATUS_TIME_OUT_READ) { 4804725f6f1SDaniel Mack dev_err(mmc_dev(host->mmc), 4814725f6f1SDaniel Mack "%s: read -ETIMEDOUT\n", __func__); 4824725f6f1SDaniel Mack data->error = -ETIMEDOUT; 4834725f6f1SDaniel Mack } else { 4844725f6f1SDaniel Mack dev_err(mmc_dev(host->mmc), "%s: -EIO\n", __func__); 485d96be879SSascha Hauer data->error = -EIO; 486d96be879SSascha Hauer } 487d96be879SSascha Hauer } else { 488d96be879SSascha Hauer data->bytes_xfered = host->datasize; 489d96be879SSascha Hauer } 490d96be879SSascha Hauer 491d96be879SSascha Hauer data_error = data->error; 492d96be879SSascha Hauer 493d96be879SSascha Hauer host->data = NULL; 494d96be879SSascha Hauer 495d96be879SSascha Hauer return data_error; 496d96be879SSascha Hauer } 497d96be879SSascha Hauer 498d96be879SSascha Hauer static void mxcmci_read_response(struct mxcmci_host *host, unsigned int stat) 499d96be879SSascha Hauer { 500d96be879SSascha Hauer struct mmc_command *cmd = host->cmd; 501d96be879SSascha Hauer int i; 502d96be879SSascha Hauer u32 a, b, c; 503d96be879SSascha Hauer 504d96be879SSascha Hauer if (!cmd) 505d96be879SSascha Hauer return; 506d96be879SSascha Hauer 507d96be879SSascha Hauer if (stat & STATUS_TIME_OUT_RESP) { 508d96be879SSascha Hauer dev_dbg(mmc_dev(host->mmc), "CMD TIMEOUT\n"); 509d96be879SSascha Hauer cmd->error = -ETIMEDOUT; 510d96be879SSascha Hauer } else if (stat & STATUS_RESP_CRC_ERR && cmd->flags & MMC_RSP_CRC) { 511d96be879SSascha Hauer dev_dbg(mmc_dev(host->mmc), "cmd crc error\n"); 512d96be879SSascha Hauer cmd->error = -EILSEQ; 513d96be879SSascha Hauer } 514d96be879SSascha Hauer 515d96be879SSascha Hauer if (cmd->flags & MMC_RSP_PRESENT) { 516d96be879SSascha Hauer if (cmd->flags & MMC_RSP_136) { 517d96be879SSascha Hauer for (i = 0; i < 4; i++) { 518c7ceab02SAnatolij Gustschin a = mxcmci_readw(host, MMC_REG_RES_FIFO); 519c7ceab02SAnatolij Gustschin b = mxcmci_readw(host, MMC_REG_RES_FIFO); 520d96be879SSascha Hauer cmd->resp[i] = a << 16 | b; 521d96be879SSascha Hauer } 522d96be879SSascha Hauer } else { 523c7ceab02SAnatolij Gustschin a = mxcmci_readw(host, MMC_REG_RES_FIFO); 524c7ceab02SAnatolij Gustschin b = mxcmci_readw(host, MMC_REG_RES_FIFO); 525c7ceab02SAnatolij Gustschin c = mxcmci_readw(host, MMC_REG_RES_FIFO); 526d96be879SSascha Hauer cmd->resp[0] = a << 24 | b << 8 | c >> 8; 527d96be879SSascha Hauer } 528d96be879SSascha Hauer } 529d96be879SSascha Hauer } 530d96be879SSascha Hauer 531d96be879SSascha Hauer static int mxcmci_poll_status(struct mxcmci_host *host, u32 mask) 532d96be879SSascha Hauer { 533d96be879SSascha Hauer u32 stat; 534d96be879SSascha Hauer unsigned long timeout = jiffies + HZ; 535d96be879SSascha Hauer 536d96be879SSascha Hauer do { 537c7ceab02SAnatolij Gustschin stat = mxcmci_readl(host, MMC_REG_STATUS); 538d96be879SSascha Hauer if (stat & STATUS_ERR_MASK) 539d96be879SSascha Hauer return stat; 54018489fa2SMartin Fuzzey if (time_after(jiffies, timeout)) { 54118489fa2SMartin Fuzzey mxcmci_softreset(host); 54218489fa2SMartin Fuzzey mxcmci_set_clk_rate(host, host->clock); 543d96be879SSascha Hauer return STATUS_TIME_OUT_READ; 54418489fa2SMartin Fuzzey } 545d96be879SSascha Hauer if (stat & mask) 546d96be879SSascha Hauer return 0; 547d96be879SSascha Hauer cpu_relax(); 548d96be879SSascha Hauer } while (1); 549d96be879SSascha Hauer } 550d96be879SSascha Hauer 551d96be879SSascha Hauer static int mxcmci_pull(struct mxcmci_host *host, void *_buf, int bytes) 552d96be879SSascha Hauer { 553d96be879SSascha Hauer unsigned int stat; 554d96be879SSascha Hauer u32 *buf = _buf; 555d96be879SSascha Hauer 556d96be879SSascha Hauer while (bytes > 3) { 557d96be879SSascha Hauer stat = mxcmci_poll_status(host, 558d96be879SSascha Hauer STATUS_BUF_READ_RDY | STATUS_READ_OP_DONE); 559d96be879SSascha Hauer if (stat) 560d96be879SSascha Hauer return stat; 561c7ceab02SAnatolij Gustschin *buf++ = cpu_to_le32(mxcmci_readl(host, MMC_REG_BUFFER_ACCESS)); 562d96be879SSascha Hauer bytes -= 4; 563d96be879SSascha Hauer } 564d96be879SSascha Hauer 565d96be879SSascha Hauer if (bytes) { 566d96be879SSascha Hauer u8 *b = (u8 *)buf; 567d96be879SSascha Hauer u32 tmp; 568d96be879SSascha Hauer 569d96be879SSascha Hauer stat = mxcmci_poll_status(host, 570d96be879SSascha Hauer STATUS_BUF_READ_RDY | STATUS_READ_OP_DONE); 571d96be879SSascha Hauer if (stat) 572d96be879SSascha Hauer return stat; 573c7ceab02SAnatolij Gustschin tmp = cpu_to_le32(mxcmci_readl(host, MMC_REG_BUFFER_ACCESS)); 574d96be879SSascha Hauer memcpy(b, &tmp, bytes); 575d96be879SSascha Hauer } 576d96be879SSascha Hauer 577d96be879SSascha Hauer return 0; 578d96be879SSascha Hauer } 579d96be879SSascha Hauer 580d96be879SSascha Hauer static int mxcmci_push(struct mxcmci_host *host, void *_buf, int bytes) 581d96be879SSascha Hauer { 582d96be879SSascha Hauer unsigned int stat; 583d96be879SSascha Hauer u32 *buf = _buf; 584d96be879SSascha Hauer 585d96be879SSascha Hauer while (bytes > 3) { 586d96be879SSascha Hauer stat = mxcmci_poll_status(host, STATUS_BUF_WRITE_RDY); 587d96be879SSascha Hauer if (stat) 588d96be879SSascha Hauer return stat; 589c7ceab02SAnatolij Gustschin mxcmci_writel(host, cpu_to_le32(*buf++), MMC_REG_BUFFER_ACCESS); 590d96be879SSascha Hauer bytes -= 4; 591d96be879SSascha Hauer } 592d96be879SSascha Hauer 593d96be879SSascha Hauer if (bytes) { 594d96be879SSascha Hauer u8 *b = (u8 *)buf; 595d96be879SSascha Hauer u32 tmp; 596d96be879SSascha Hauer 597d96be879SSascha Hauer stat = mxcmci_poll_status(host, STATUS_BUF_WRITE_RDY); 598d96be879SSascha Hauer if (stat) 599d96be879SSascha Hauer return stat; 600d96be879SSascha Hauer 601d96be879SSascha Hauer memcpy(&tmp, b, bytes); 602c7ceab02SAnatolij Gustschin mxcmci_writel(host, cpu_to_le32(tmp), MMC_REG_BUFFER_ACCESS); 603d96be879SSascha Hauer } 604d96be879SSascha Hauer 6056d916416SFabio Estevam return mxcmci_poll_status(host, STATUS_BUF_WRITE_RDY); 606d96be879SSascha Hauer } 607d96be879SSascha Hauer 608d96be879SSascha Hauer static int mxcmci_transfer_data(struct mxcmci_host *host) 609d96be879SSascha Hauer { 610d96be879SSascha Hauer struct mmc_data *data = host->req->data; 611d96be879SSascha Hauer struct scatterlist *sg; 612d96be879SSascha Hauer int stat, i; 613d96be879SSascha Hauer 614d96be879SSascha Hauer host->data = data; 615d96be879SSascha Hauer host->datasize = 0; 616d96be879SSascha Hauer 617d96be879SSascha Hauer if (data->flags & MMC_DATA_READ) { 618d96be879SSascha Hauer for_each_sg(data->sg, sg, data->sg_len, i) { 619d96be879SSascha Hauer stat = mxcmci_pull(host, sg_virt(sg), sg->length); 620d96be879SSascha Hauer if (stat) 621d96be879SSascha Hauer return stat; 622d96be879SSascha Hauer host->datasize += sg->length; 623d96be879SSascha Hauer } 624d96be879SSascha Hauer } else { 625d96be879SSascha Hauer for_each_sg(data->sg, sg, data->sg_len, i) { 626d96be879SSascha Hauer stat = mxcmci_push(host, sg_virt(sg), sg->length); 627d96be879SSascha Hauer if (stat) 628d96be879SSascha Hauer return stat; 629d96be879SSascha Hauer host->datasize += sg->length; 630d96be879SSascha Hauer } 631d96be879SSascha Hauer stat = mxcmci_poll_status(host, STATUS_WRITE_OP_DONE); 632d96be879SSascha Hauer if (stat) 633d96be879SSascha Hauer return stat; 634d96be879SSascha Hauer } 635d96be879SSascha Hauer return 0; 636d96be879SSascha Hauer } 637d96be879SSascha Hauer 638d96be879SSascha Hauer static void mxcmci_datawork(struct work_struct *work) 639d96be879SSascha Hauer { 640d96be879SSascha Hauer struct mxcmci_host *host = container_of(work, struct mxcmci_host, 641d96be879SSascha Hauer datawork); 642d96be879SSascha Hauer int datastat = mxcmci_transfer_data(host); 6434a31f2efSDaniel Mack 644c7ceab02SAnatolij Gustschin mxcmci_writel(host, STATUS_READ_OP_DONE | STATUS_WRITE_OP_DONE, 645c7ceab02SAnatolij Gustschin MMC_REG_STATUS); 646d96be879SSascha Hauer mxcmci_finish_data(host, datastat); 647d96be879SSascha Hauer 648d96be879SSascha Hauer if (host->req->stop) { 649d96be879SSascha Hauer if (mxcmci_start_cmd(host, host->req->stop, 0)) { 650d96be879SSascha Hauer mxcmci_finish_request(host, host->req); 651d96be879SSascha Hauer return; 652d96be879SSascha Hauer } 653d96be879SSascha Hauer } else { 654d96be879SSascha Hauer mxcmci_finish_request(host, host->req); 655d96be879SSascha Hauer } 656d96be879SSascha Hauer } 657d96be879SSascha Hauer 658d96be879SSascha Hauer static void mxcmci_data_done(struct mxcmci_host *host, unsigned int stat) 659d96be879SSascha Hauer { 66070aa6109SAnatolij Gustschin struct mmc_request *req; 661d96be879SSascha Hauer int data_error; 66270aa6109SAnatolij Gustschin unsigned long flags; 663d96be879SSascha Hauer 66470aa6109SAnatolij Gustschin spin_lock_irqsave(&host->lock, flags); 66570aa6109SAnatolij Gustschin 66670aa6109SAnatolij Gustschin if (!host->data) { 66770aa6109SAnatolij Gustschin spin_unlock_irqrestore(&host->lock, flags); 668d96be879SSascha Hauer return; 66970aa6109SAnatolij Gustschin } 67070aa6109SAnatolij Gustschin 67170aa6109SAnatolij Gustschin if (!host->req) { 67270aa6109SAnatolij Gustschin spin_unlock_irqrestore(&host->lock, flags); 67370aa6109SAnatolij Gustschin return; 67470aa6109SAnatolij Gustschin } 67570aa6109SAnatolij Gustschin 67670aa6109SAnatolij Gustschin req = host->req; 67770aa6109SAnatolij Gustschin if (!req->stop) 67870aa6109SAnatolij Gustschin host->req = NULL; /* we will handle finish req below */ 679d96be879SSascha Hauer 680d96be879SSascha Hauer data_error = mxcmci_finish_data(host, stat); 681d96be879SSascha Hauer 68270aa6109SAnatolij Gustschin spin_unlock_irqrestore(&host->lock, flags); 68370aa6109SAnatolij Gustschin 68409954ea9SShawn Lin if (data_error) 68509954ea9SShawn Lin return; 68609954ea9SShawn Lin 687d96be879SSascha Hauer mxcmci_read_response(host, stat); 688d96be879SSascha Hauer host->cmd = NULL; 689d96be879SSascha Hauer 69070aa6109SAnatolij Gustschin if (req->stop) { 69170aa6109SAnatolij Gustschin if (mxcmci_start_cmd(host, req->stop, 0)) { 69270aa6109SAnatolij Gustschin mxcmci_finish_request(host, req); 693d96be879SSascha Hauer return; 694d96be879SSascha Hauer } 695d96be879SSascha Hauer } else { 69670aa6109SAnatolij Gustschin mxcmci_finish_request(host, req); 697d96be879SSascha Hauer } 698d96be879SSascha Hauer } 699d96be879SSascha Hauer 700d96be879SSascha Hauer static void mxcmci_cmd_done(struct mxcmci_host *host, unsigned int stat) 701d96be879SSascha Hauer { 702d96be879SSascha Hauer mxcmci_read_response(host, stat); 703d96be879SSascha Hauer host->cmd = NULL; 704d96be879SSascha Hauer 705d96be879SSascha Hauer if (!host->data && host->req) { 706d96be879SSascha Hauer mxcmci_finish_request(host, host->req); 707d96be879SSascha Hauer return; 708d96be879SSascha Hauer } 709d96be879SSascha Hauer 710d96be879SSascha Hauer /* For the DMA case the DMA engine handles the data transfer 711fd589a8fSAnand Gadiyar * automatically. For non DMA we have to do it ourselves. 712d96be879SSascha Hauer * Don't do it in interrupt context though. 713d96be879SSascha Hauer */ 714d96be879SSascha Hauer if (!mxcmci_use_dma(host) && host->data) 715d96be879SSascha Hauer schedule_work(&host->datawork); 716d96be879SSascha Hauer 717d96be879SSascha Hauer } 718d96be879SSascha Hauer 719d96be879SSascha Hauer static irqreturn_t mxcmci_irq(int irq, void *devid) 720d96be879SSascha Hauer { 721d96be879SSascha Hauer struct mxcmci_host *host = devid; 722f441b993SDaniel Mack unsigned long flags; 723f441b993SDaniel Mack bool sdio_irq; 724d96be879SSascha Hauer u32 stat; 725d96be879SSascha Hauer 726c7ceab02SAnatolij Gustschin stat = mxcmci_readl(host, MMC_REG_STATUS); 727c7ceab02SAnatolij Gustschin mxcmci_writel(host, 728c7ceab02SAnatolij Gustschin stat & ~(STATUS_SDIO_INT_ACTIVE | STATUS_DATA_TRANS_DONE | 729c7ceab02SAnatolij Gustschin STATUS_WRITE_OP_DONE), 730c7ceab02SAnatolij Gustschin MMC_REG_STATUS); 731d96be879SSascha Hauer 732d96be879SSascha Hauer dev_dbg(mmc_dev(host->mmc), "%s: 0x%08x\n", __func__, stat); 733d96be879SSascha Hauer 734f441b993SDaniel Mack spin_lock_irqsave(&host->lock, flags); 735f441b993SDaniel Mack sdio_irq = (stat & STATUS_SDIO_INT_ACTIVE) && host->use_sdio; 736f441b993SDaniel Mack spin_unlock_irqrestore(&host->lock, flags); 737f441b993SDaniel Mack 738adfa5703SMatteo Facchinetti if (mxcmci_use_dma(host) && (stat & (STATUS_WRITE_OP_DONE))) 739adfa5703SMatteo Facchinetti mxcmci_writel(host, STATUS_WRITE_OP_DONE, MMC_REG_STATUS); 7404a31f2efSDaniel Mack 741f441b993SDaniel Mack if (sdio_irq) { 742c7ceab02SAnatolij Gustschin mxcmci_writel(host, STATUS_SDIO_INT_ACTIVE, MMC_REG_STATUS); 743f441b993SDaniel Mack mmc_signal_sdio_irq(host->mmc); 744f441b993SDaniel Mack } 745f441b993SDaniel Mack 746d96be879SSascha Hauer if (stat & STATUS_END_CMD_RESP) 747d96be879SSascha Hauer mxcmci_cmd_done(host, stat); 748f441b993SDaniel Mack 749adfa5703SMatteo Facchinetti if (mxcmci_use_dma(host) && (stat & STATUS_WRITE_OP_DONE)) { 750f6ad0a48SJavier Martin del_timer(&host->watchdog); 751d96be879SSascha Hauer mxcmci_data_done(host, stat); 752f6ad0a48SJavier Martin } 753f53fbde4SSascha Hauer 75416b3bf8cSEric Bénard if (host->default_irq_mask && 75516b3bf8cSEric Bénard (stat & (STATUS_CARD_INSERTION | STATUS_CARD_REMOVAL))) 75616b3bf8cSEric Bénard mmc_detect_change(host->mmc, msecs_to_jiffies(200)); 757f53fbde4SSascha Hauer 758d96be879SSascha Hauer return IRQ_HANDLED; 759d96be879SSascha Hauer } 760d96be879SSascha Hauer 761d96be879SSascha Hauer static void mxcmci_request(struct mmc_host *mmc, struct mmc_request *req) 762d96be879SSascha Hauer { 763d96be879SSascha Hauer struct mxcmci_host *host = mmc_priv(mmc); 764d96be879SSascha Hauer unsigned int cmdat = host->cmdat; 765656217d2SMartin Fuzzey int error; 766d96be879SSascha Hauer 767d96be879SSascha Hauer WARN_ON(host->req != NULL); 768d96be879SSascha Hauer 769d96be879SSascha Hauer host->req = req; 770d96be879SSascha Hauer host->cmdat &= ~CMD_DAT_CONT_INIT; 771f53fbde4SSascha Hauer 772f53fbde4SSascha Hauer if (host->dma) 773d96be879SSascha Hauer host->do_dma = 1; 774f53fbde4SSascha Hauer 775d96be879SSascha Hauer if (req->data) { 776656217d2SMartin Fuzzey error = mxcmci_setup_data(host, req->data); 777656217d2SMartin Fuzzey if (error) { 778656217d2SMartin Fuzzey req->cmd->error = error; 779656217d2SMartin Fuzzey goto out; 780656217d2SMartin Fuzzey } 781656217d2SMartin Fuzzey 782d96be879SSascha Hauer 783d96be879SSascha Hauer cmdat |= CMD_DAT_CONT_DATA_ENABLE; 784d96be879SSascha Hauer 785d96be879SSascha Hauer if (req->data->flags & MMC_DATA_WRITE) 786d96be879SSascha Hauer cmdat |= CMD_DAT_CONT_WRITE; 787d96be879SSascha Hauer } 788d96be879SSascha Hauer 789656217d2SMartin Fuzzey error = mxcmci_start_cmd(host, req->cmd, cmdat); 790f53fbde4SSascha Hauer 791656217d2SMartin Fuzzey out: 792656217d2SMartin Fuzzey if (error) 793d96be879SSascha Hauer mxcmci_finish_request(host, req); 794d96be879SSascha Hauer } 795d96be879SSascha Hauer 796d96be879SSascha Hauer static void mxcmci_set_clk_rate(struct mxcmci_host *host, unsigned int clk_ios) 797d96be879SSascha Hauer { 798d96be879SSascha Hauer unsigned int divider; 799d96be879SSascha Hauer int prescaler = 0; 800529aa29eSSascha Hauer unsigned int clk_in = clk_get_rate(host->clk_per); 801d96be879SSascha Hauer 802d96be879SSascha Hauer while (prescaler <= 0x800) { 803d96be879SSascha Hauer for (divider = 1; divider <= 0xF; divider++) { 804d96be879SSascha Hauer int x; 805d96be879SSascha Hauer 806d96be879SSascha Hauer x = (clk_in / (divider + 1)); 807d96be879SSascha Hauer 808d96be879SSascha Hauer if (prescaler) 809d96be879SSascha Hauer x /= (prescaler * 2); 810d96be879SSascha Hauer 811d96be879SSascha Hauer if (x <= clk_ios) 812d96be879SSascha Hauer break; 813d96be879SSascha Hauer } 814d96be879SSascha Hauer if (divider < 0x10) 815d96be879SSascha Hauer break; 816d96be879SSascha Hauer 817d96be879SSascha Hauer if (prescaler == 0) 818d96be879SSascha Hauer prescaler = 1; 819d96be879SSascha Hauer else 820d96be879SSascha Hauer prescaler <<= 1; 821d96be879SSascha Hauer } 822d96be879SSascha Hauer 823c7ceab02SAnatolij Gustschin mxcmci_writew(host, (prescaler << 4) | divider, MMC_REG_CLK_RATE); 824d96be879SSascha Hauer 825d96be879SSascha Hauer dev_dbg(mmc_dev(host->mmc), "scaler: %d divider: %d in: %d out: %d\n", 826d96be879SSascha Hauer prescaler, divider, clk_in, clk_ios); 827d96be879SSascha Hauer } 828d96be879SSascha Hauer 829f53fbde4SSascha Hauer static int mxcmci_setup_dma(struct mmc_host *mmc) 830f53fbde4SSascha Hauer { 831f53fbde4SSascha Hauer struct mxcmci_host *host = mmc_priv(mmc); 832f53fbde4SSascha Hauer struct dma_slave_config *config = &host->dma_slave_config; 833f53fbde4SSascha Hauer 83401e4f958SAlexander Shiyan config->dst_addr = host->phys_base + MMC_REG_BUFFER_ACCESS; 83501e4f958SAlexander Shiyan config->src_addr = host->phys_base + MMC_REG_BUFFER_ACCESS; 836f53fbde4SSascha Hauer config->dst_addr_width = 4; 837f53fbde4SSascha Hauer config->src_addr_width = 4; 838f53fbde4SSascha Hauer config->dst_maxburst = host->burstlen; 839f53fbde4SSascha Hauer config->src_maxburst = host->burstlen; 840258aea76SViresh Kumar config->device_fc = false; 841f53fbde4SSascha Hauer 842f53fbde4SSascha Hauer return dmaengine_slave_config(host->dma, config); 843f53fbde4SSascha Hauer } 844f53fbde4SSascha Hauer 845d96be879SSascha Hauer static void mxcmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) 846d96be879SSascha Hauer { 847d96be879SSascha Hauer struct mxcmci_host *host = mmc_priv(mmc); 848f53fbde4SSascha Hauer int burstlen, ret; 849f53fbde4SSascha Hauer 850d96be879SSascha Hauer /* 8516584cb88SSascha Hauer * use burstlen of 64 (16 words) in 4 bit mode (--> reg value 0) 8526584cb88SSascha Hauer * use burstlen of 16 (4 words) in 1 bit mode (--> reg value 16) 853d96be879SSascha Hauer */ 854d96be879SSascha Hauer if (ios->bus_width == MMC_BUS_WIDTH_4) 855f53fbde4SSascha Hauer burstlen = 16; 8566584cb88SSascha Hauer else 8576584cb88SSascha Hauer burstlen = 4; 858d96be879SSascha Hauer 859f53fbde4SSascha Hauer if (mxcmci_use_dma(host) && burstlen != host->burstlen) { 860f53fbde4SSascha Hauer host->burstlen = burstlen; 861f53fbde4SSascha Hauer ret = mxcmci_setup_dma(mmc); 862f53fbde4SSascha Hauer if (ret) { 863f53fbde4SSascha Hauer dev_err(mmc_dev(host->mmc), 864f53fbde4SSascha Hauer "failed to config DMA channel. Falling back to PIO\n"); 865f53fbde4SSascha Hauer dma_release_channel(host->dma); 866f53fbde4SSascha Hauer host->do_dma = 0; 867e58f516fSSascha Hauer host->dma = NULL; 868f53fbde4SSascha Hauer } 869f53fbde4SSascha Hauer } 870f53fbde4SSascha Hauer 871d96be879SSascha Hauer if (ios->bus_width == MMC_BUS_WIDTH_4) 872d96be879SSascha Hauer host->cmdat |= CMD_DAT_CONT_BUS_WIDTH_4; 873d96be879SSascha Hauer else 874d96be879SSascha Hauer host->cmdat &= ~CMD_DAT_CONT_BUS_WIDTH_4; 875d96be879SSascha Hauer 876d96be879SSascha Hauer if (host->power_mode != ios->power_mode) { 877d96be879SSascha Hauer host->power_mode = ios->power_mode; 878bc3c1771SAlexander Shiyan mxcmci_set_power(host, ios->vdd); 87974b66954SAlberto Panizzo 880d96be879SSascha Hauer if (ios->power_mode == MMC_POWER_ON) 881d96be879SSascha Hauer host->cmdat |= CMD_DAT_CONT_INIT; 882d96be879SSascha Hauer } 883d96be879SSascha Hauer 884d96be879SSascha Hauer if (ios->clock) { 885d96be879SSascha Hauer mxcmci_set_clk_rate(host, ios->clock); 886c7ceab02SAnatolij Gustschin mxcmci_writew(host, STR_STP_CLK_START_CLK, MMC_REG_STR_STP_CLK); 887d96be879SSascha Hauer } else { 888c7ceab02SAnatolij Gustschin mxcmci_writew(host, STR_STP_CLK_STOP_CLK, MMC_REG_STR_STP_CLK); 889d96be879SSascha Hauer } 890d96be879SSascha Hauer 891d96be879SSascha Hauer host->clock = ios->clock; 892d96be879SSascha Hauer } 893d96be879SSascha Hauer 894d96be879SSascha Hauer static irqreturn_t mxcmci_detect_irq(int irq, void *data) 895d96be879SSascha Hauer { 896d96be879SSascha Hauer struct mmc_host *mmc = data; 897d96be879SSascha Hauer 898d96be879SSascha Hauer dev_dbg(mmc_dev(mmc), "%s\n", __func__); 899d96be879SSascha Hauer 900d96be879SSascha Hauer mmc_detect_change(mmc, msecs_to_jiffies(250)); 901d96be879SSascha Hauer return IRQ_HANDLED; 902d96be879SSascha Hauer } 903d96be879SSascha Hauer 904d96be879SSascha Hauer static int mxcmci_get_ro(struct mmc_host *mmc) 905d96be879SSascha Hauer { 906d96be879SSascha Hauer struct mxcmci_host *host = mmc_priv(mmc); 907d96be879SSascha Hauer 908d96be879SSascha Hauer if (host->pdata && host->pdata->get_ro) 909d96be879SSascha Hauer return !!host->pdata->get_ro(mmc_dev(mmc)); 910d96be879SSascha Hauer /* 911bcf53524SAnatolij Gustschin * If board doesn't support read only detection (no mmc_gpio 912bcf53524SAnatolij Gustschin * context or gpio is invalid), then let the mmc core decide 913bcf53524SAnatolij Gustschin * what to do. 914d96be879SSascha Hauer */ 915bcf53524SAnatolij Gustschin return mmc_gpio_get_ro(mmc); 916d96be879SSascha Hauer } 917d96be879SSascha Hauer 918f441b993SDaniel Mack static void mxcmci_enable_sdio_irq(struct mmc_host *mmc, int enable) 919f441b993SDaniel Mack { 920f441b993SDaniel Mack struct mxcmci_host *host = mmc_priv(mmc); 921f441b993SDaniel Mack unsigned long flags; 922f441b993SDaniel Mack u32 int_cntr; 923f441b993SDaniel Mack 924f441b993SDaniel Mack spin_lock_irqsave(&host->lock, flags); 925f441b993SDaniel Mack host->use_sdio = enable; 926c7ceab02SAnatolij Gustschin int_cntr = mxcmci_readl(host, MMC_REG_INT_CNTR); 927f441b993SDaniel Mack 928f441b993SDaniel Mack if (enable) 929f441b993SDaniel Mack int_cntr |= INT_SDIO_IRQ_EN; 930f441b993SDaniel Mack else 931f441b993SDaniel Mack int_cntr &= ~INT_SDIO_IRQ_EN; 932f441b993SDaniel Mack 933c7ceab02SAnatolij Gustschin mxcmci_writel(host, int_cntr, MMC_REG_INT_CNTR); 934f441b993SDaniel Mack spin_unlock_irqrestore(&host->lock, flags); 935f441b993SDaniel Mack } 936d96be879SSascha Hauer 9373fcb027dSDaniel Mack static void mxcmci_init_card(struct mmc_host *host, struct mmc_card *card) 9383fcb027dSDaniel Mack { 9397f917a8dSShawn Guo struct mxcmci_host *mxcmci = mmc_priv(host); 9407f917a8dSShawn Guo 9413fcb027dSDaniel Mack /* 9423fcb027dSDaniel Mack * MX3 SoCs have a silicon bug which corrupts CRC calculation of 9433fcb027dSDaniel Mack * multi-block transfers when connected SDIO peripheral doesn't 9443fcb027dSDaniel Mack * drive the BUSY line as required by the specs. 9453fcb027dSDaniel Mack * One way to prevent this is to only allow 1-bit transfers. 9463fcb027dSDaniel Mack */ 9473fcb027dSDaniel Mack 9487f917a8dSShawn Guo if (is_imx31_mmc(mxcmci) && card->type == MMC_TYPE_SDIO) 9493fcb027dSDaniel Mack host->caps &= ~MMC_CAP_4_BIT_DATA; 9503fcb027dSDaniel Mack else 9513fcb027dSDaniel Mack host->caps |= MMC_CAP_4_BIT_DATA; 9523fcb027dSDaniel Mack } 9533fcb027dSDaniel Mack 954f53fbde4SSascha Hauer static bool filter(struct dma_chan *chan, void *param) 955f53fbde4SSascha Hauer { 956f53fbde4SSascha Hauer struct mxcmci_host *host = param; 957f53fbde4SSascha Hauer 958f53fbde4SSascha Hauer if (!imx_dma_is_general_purpose(chan)) 959f53fbde4SSascha Hauer return false; 960f53fbde4SSascha Hauer 961f53fbde4SSascha Hauer chan->private = &host->dma_data; 962f53fbde4SSascha Hauer 963f53fbde4SSascha Hauer return true; 964f53fbde4SSascha Hauer } 965f53fbde4SSascha Hauer 966f6ad0a48SJavier Martin static void mxcmci_watchdog(unsigned long data) 967f6ad0a48SJavier Martin { 968f6ad0a48SJavier Martin struct mmc_host *mmc = (struct mmc_host *)data; 969f6ad0a48SJavier Martin struct mxcmci_host *host = mmc_priv(mmc); 970f6ad0a48SJavier Martin struct mmc_request *req = host->req; 971c7ceab02SAnatolij Gustschin unsigned int stat = mxcmci_readl(host, MMC_REG_STATUS); 972f6ad0a48SJavier Martin 973f6ad0a48SJavier Martin if (host->dma_dir == DMA_FROM_DEVICE) { 974f6ad0a48SJavier Martin dmaengine_terminate_all(host->dma); 975f6ad0a48SJavier Martin dev_err(mmc_dev(host->mmc), 976f6ad0a48SJavier Martin "%s: read time out (status = 0x%08x)\n", 977f6ad0a48SJavier Martin __func__, stat); 978f6ad0a48SJavier Martin } else { 979f6ad0a48SJavier Martin dev_err(mmc_dev(host->mmc), 980f6ad0a48SJavier Martin "%s: write time out (status = 0x%08x)\n", 981f6ad0a48SJavier Martin __func__, stat); 982f6ad0a48SJavier Martin mxcmci_softreset(host); 983f6ad0a48SJavier Martin } 984f6ad0a48SJavier Martin 985f6ad0a48SJavier Martin /* Mark transfer as erroneus and inform the upper layers */ 986f6ad0a48SJavier Martin 98770aa6109SAnatolij Gustschin if (host->data) 988f6ad0a48SJavier Martin host->data->error = -ETIMEDOUT; 989f6ad0a48SJavier Martin host->req = NULL; 990f6ad0a48SJavier Martin host->cmd = NULL; 991f6ad0a48SJavier Martin host->data = NULL; 992f6ad0a48SJavier Martin mmc_request_done(host->mmc, req); 993f6ad0a48SJavier Martin } 994f6ad0a48SJavier Martin 995d96be879SSascha Hauer static const struct mmc_host_ops mxcmci_ops = { 996d96be879SSascha Hauer .request = mxcmci_request, 997d96be879SSascha Hauer .set_ios = mxcmci_set_ios, 998d96be879SSascha Hauer .get_ro = mxcmci_get_ro, 999f441b993SDaniel Mack .enable_sdio_irq = mxcmci_enable_sdio_irq, 10003fcb027dSDaniel Mack .init_card = mxcmci_init_card, 1001d96be879SSascha Hauer }; 1002d96be879SSascha Hauer 1003d96be879SSascha Hauer static int mxcmci_probe(struct platform_device *pdev) 1004d96be879SSascha Hauer { 1005d96be879SSascha Hauer struct mmc_host *mmc; 100601e4f958SAlexander Shiyan struct mxcmci_host *host; 100701e4f958SAlexander Shiyan struct resource *res; 1008d96be879SSascha Hauer int ret = 0, irq; 10097ff747c4SMarkus Pargmann bool dat3_card_detect = false; 1010f53fbde4SSascha Hauer dma_cap_mask_t mask; 10117ff747c4SMarkus Pargmann const struct of_device_id *of_id; 10127ff747c4SMarkus Pargmann struct imxmmc_platform_data *pdata = pdev->dev.platform_data; 1013d96be879SSascha Hauer 1014c7ceab02SAnatolij Gustschin pr_info("i.MX/MPC512x SDHC driver\n"); 1015d96be879SSascha Hauer 10167ff747c4SMarkus Pargmann of_id = of_match_device(mxcmci_of_match, &pdev->dev); 10177ff747c4SMarkus Pargmann 101801e4f958SAlexander Shiyan res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 1019d96be879SSascha Hauer irq = platform_get_irq(pdev, 0); 1020f216c124SGustavo A. R. Silva if (irq < 0) { 1021f216c124SGustavo A. R. Silva dev_err(&pdev->dev, "failed to get IRQ: %d\n", irq); 1022f216c124SGustavo A. R. Silva return irq; 1023f216c124SGustavo A. R. Silva } 1024d96be879SSascha Hauer 102501e4f958SAlexander Shiyan mmc = mmc_alloc_host(sizeof(*host), &pdev->dev); 102601e4f958SAlexander Shiyan if (!mmc) 102701e4f958SAlexander Shiyan return -ENOMEM; 1028d96be879SSascha Hauer 102901e4f958SAlexander Shiyan host = mmc_priv(mmc); 103001e4f958SAlexander Shiyan 103101e4f958SAlexander Shiyan host->base = devm_ioremap_resource(&pdev->dev, res); 103201e4f958SAlexander Shiyan if (IS_ERR(host->base)) { 103301e4f958SAlexander Shiyan ret = PTR_ERR(host->base); 103401e4f958SAlexander Shiyan goto out_free; 1035d96be879SSascha Hauer } 1036d96be879SSascha Hauer 103701e4f958SAlexander Shiyan host->phys_base = res->start; 103801e4f958SAlexander Shiyan 1039b8857696SSimon Baatz ret = mmc_of_parse(mmc); 1040b8857696SSimon Baatz if (ret) 1041b8857696SSimon Baatz goto out_free; 1042d96be879SSascha Hauer mmc->ops = &mxcmci_ops; 10437ff747c4SMarkus Pargmann 10447ff747c4SMarkus Pargmann /* For devicetree parsing, the bus width is read from devicetree */ 10457ff747c4SMarkus Pargmann if (pdata) 1046f441b993SDaniel Mack mmc->caps = MMC_CAP_4_BIT_DATA | MMC_CAP_SDIO_IRQ; 10477ff747c4SMarkus Pargmann else 10487ff747c4SMarkus Pargmann mmc->caps |= MMC_CAP_SDIO_IRQ; 1049d96be879SSascha Hauer 1050d96be879SSascha Hauer /* MMC core transfer sizes tunable parameters */ 1051d96be879SSascha Hauer mmc->max_blk_size = 2048; 1052d96be879SSascha Hauer mmc->max_blk_count = 65535; 1053d96be879SSascha Hauer mmc->max_req_size = mmc->max_blk_size * mmc->max_blk_count; 1054d759c374SVladimir Zapolskiy mmc->max_seg_size = mmc->max_req_size; 1055d96be879SSascha Hauer 10567ff747c4SMarkus Pargmann if (of_id) { 10577ff747c4SMarkus Pargmann const struct platform_device_id *id_entry = of_id->data; 10587ff747c4SMarkus Pargmann host->devtype = id_entry->driver_data; 10597ff747c4SMarkus Pargmann } else { 10607f917a8dSShawn Guo host->devtype = pdev->id_entry->driver_data; 10617ff747c4SMarkus Pargmann } 1062e48fc15aSAnatolij Gustschin 1063e48fc15aSAnatolij Gustschin /* adjust max_segs after devtype detection */ 1064e48fc15aSAnatolij Gustschin if (!is_mpc512x_mmc(host)) 1065e48fc15aSAnatolij Gustschin mmc->max_segs = 64; 1066e48fc15aSAnatolij Gustschin 10677ff747c4SMarkus Pargmann host->mmc = mmc; 10687ff747c4SMarkus Pargmann host->pdata = pdata; 1069f441b993SDaniel Mack spin_lock_init(&host->lock); 1070d96be879SSascha Hauer 10717ff747c4SMarkus Pargmann if (pdata) 10727ff747c4SMarkus Pargmann dat3_card_detect = pdata->dat3_card_detect; 1073860951c5SJaehoon Chung else if (mmc_card_is_removable(mmc) 10747ff747c4SMarkus Pargmann && !of_property_read_bool(pdev->dev.of_node, "cd-gpios")) 10757ff747c4SMarkus Pargmann dat3_card_detect = true; 10767ff747c4SMarkus Pargmann 1077bc3c1771SAlexander Shiyan ret = mmc_regulator_get_supply(mmc); 107818a09806SMatteo Facchinetti if (ret == -EPROBE_DEFER) 1079bc3c1771SAlexander Shiyan goto out_free; 108018a09806SMatteo Facchinetti 108118a09806SMatteo Facchinetti if (!mmc->ocr_avail) { 108218a09806SMatteo Facchinetti if (pdata && pdata->ocr_avail) 108318a09806SMatteo Facchinetti mmc->ocr_avail = pdata->ocr_avail; 108418a09806SMatteo Facchinetti else 108518a09806SMatteo Facchinetti mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34; 1086bc3c1771SAlexander Shiyan } 1087d96be879SSascha Hauer 10887ff747c4SMarkus Pargmann if (dat3_card_detect) 108916b3bf8cSEric Bénard host->default_irq_mask = 109016b3bf8cSEric Bénard INT_CARD_INSERTION_EN | INT_CARD_REMOVAL_EN; 109116b3bf8cSEric Bénard else 109216b3bf8cSEric Bénard host->default_irq_mask = 0; 109316b3bf8cSEric Bénard 1094529aa29eSSascha Hauer host->clk_ipg = devm_clk_get(&pdev->dev, "ipg"); 1095529aa29eSSascha Hauer if (IS_ERR(host->clk_ipg)) { 1096529aa29eSSascha Hauer ret = PTR_ERR(host->clk_ipg); 109701e4f958SAlexander Shiyan goto out_free; 1098d96be879SSascha Hauer } 1099529aa29eSSascha Hauer 1100529aa29eSSascha Hauer host->clk_per = devm_clk_get(&pdev->dev, "per"); 1101529aa29eSSascha Hauer if (IS_ERR(host->clk_per)) { 1102529aa29eSSascha Hauer ret = PTR_ERR(host->clk_per); 110301e4f958SAlexander Shiyan goto out_free; 1104529aa29eSSascha Hauer } 1105529aa29eSSascha Hauer 1106a2bc74cfSArvind Yadav ret = clk_prepare_enable(host->clk_per); 1107a2bc74cfSArvind Yadav if (ret) 1108a2bc74cfSArvind Yadav goto out_free; 1109a2bc74cfSArvind Yadav 1110a2bc74cfSArvind Yadav ret = clk_prepare_enable(host->clk_ipg); 1111a2bc74cfSArvind Yadav if (ret) 1112a2bc74cfSArvind Yadav goto out_clk_per_put; 1113d96be879SSascha Hauer 1114d96be879SSascha Hauer mxcmci_softreset(host); 1115d96be879SSascha Hauer 1116c7ceab02SAnatolij Gustschin host->rev_no = mxcmci_readw(host, MMC_REG_REV_NO); 1117d96be879SSascha Hauer if (host->rev_no != 0x400) { 1118d96be879SSascha Hauer ret = -ENODEV; 1119d96be879SSascha Hauer dev_err(mmc_dev(host->mmc), "wrong rev.no. 0x%08x. aborting.\n", 1120d96be879SSascha Hauer host->rev_no); 1121d96be879SSascha Hauer goto out_clk_put; 1122d96be879SSascha Hauer } 1123d96be879SSascha Hauer 1124529aa29eSSascha Hauer mmc->f_min = clk_get_rate(host->clk_per) >> 16; 1125529aa29eSSascha Hauer mmc->f_max = clk_get_rate(host->clk_per) >> 1; 1126d96be879SSascha Hauer 1127d96be879SSascha Hauer /* recommended in data sheet */ 1128c7ceab02SAnatolij Gustschin mxcmci_writew(host, 0x2db4, MMC_REG_READ_TO); 1129d96be879SSascha Hauer 1130c7ceab02SAnatolij Gustschin mxcmci_writel(host, host->default_irq_mask, MMC_REG_INT_CNTR); 1131d96be879SSascha Hauer 11327ff747c4SMarkus Pargmann if (!host->pdata) { 11337ff747c4SMarkus Pargmann host->dma = dma_request_slave_channel(&pdev->dev, "rx-tx"); 11347ff747c4SMarkus Pargmann } else { 113501e4f958SAlexander Shiyan res = platform_get_resource(pdev, IORESOURCE_DMA, 0); 113601e4f958SAlexander Shiyan if (res) { 113701e4f958SAlexander Shiyan host->dmareq = res->start; 1138f53fbde4SSascha Hauer host->dma_data.peripheral_type = IMX_DMATYPE_SDHC; 1139f53fbde4SSascha Hauer host->dma_data.priority = DMA_PRIO_LOW; 1140f53fbde4SSascha Hauer host->dma_data.dma_request = host->dmareq; 1141f53fbde4SSascha Hauer dma_cap_zero(mask); 1142f53fbde4SSascha Hauer dma_cap_set(DMA_SLAVE, mask); 1143f53fbde4SSascha Hauer host->dma = dma_request_channel(mask, filter, host); 11447ff747c4SMarkus Pargmann } 11457ff747c4SMarkus Pargmann } 1146f53fbde4SSascha Hauer if (host->dma) 1147f53fbde4SSascha Hauer mmc->max_seg_size = dma_get_max_seg_size( 1148f53fbde4SSascha Hauer host->dma->device->dev); 11497ff747c4SMarkus Pargmann else 1150f53fbde4SSascha Hauer dev_info(mmc_dev(host->mmc), "dma not available. Using PIO\n"); 1151f53fbde4SSascha Hauer 1152d96be879SSascha Hauer INIT_WORK(&host->datawork, mxcmci_datawork); 1153d96be879SSascha Hauer 115401e4f958SAlexander Shiyan ret = devm_request_irq(&pdev->dev, irq, mxcmci_irq, 0, 115501e4f958SAlexander Shiyan dev_name(&pdev->dev), host); 1156d96be879SSascha Hauer if (ret) 1157d96be879SSascha Hauer goto out_free_dma; 1158d96be879SSascha Hauer 1159d96be879SSascha Hauer platform_set_drvdata(pdev, mmc); 1160d96be879SSascha Hauer 1161d96be879SSascha Hauer if (host->pdata && host->pdata->init) { 1162d96be879SSascha Hauer ret = host->pdata->init(&pdev->dev, mxcmci_detect_irq, 1163d96be879SSascha Hauer host->mmc); 1164d96be879SSascha Hauer if (ret) 116501e4f958SAlexander Shiyan goto out_free_dma; 1166d96be879SSascha Hauer } 1167d96be879SSascha Hauer 1168f6ad0a48SJavier Martin init_timer(&host->watchdog); 1169f6ad0a48SJavier Martin host->watchdog.function = &mxcmci_watchdog; 1170f6ad0a48SJavier Martin host->watchdog.data = (unsigned long)mmc; 1171f6ad0a48SJavier Martin 1172abd4190fSAlexander Shiyan mmc_add_host(mmc); 1173abd4190fSAlexander Shiyan 1174d96be879SSascha Hauer return 0; 1175d96be879SSascha Hauer 1176d96be879SSascha Hauer out_free_dma: 1177f53fbde4SSascha Hauer if (host->dma) 1178f53fbde4SSascha Hauer dma_release_channel(host->dma); 117901e4f958SAlexander Shiyan 1180d96be879SSascha Hauer out_clk_put: 1181529aa29eSSascha Hauer clk_disable_unprepare(host->clk_ipg); 1182a2bc74cfSArvind Yadav out_clk_per_put: 1183a2bc74cfSArvind Yadav clk_disable_unprepare(host->clk_per); 118401e4f958SAlexander Shiyan 1185d96be879SSascha Hauer out_free: 1186d96be879SSascha Hauer mmc_free_host(mmc); 118701e4f958SAlexander Shiyan 1188d96be879SSascha Hauer return ret; 1189d96be879SSascha Hauer } 1190d96be879SSascha Hauer 1191d96be879SSascha Hauer static int mxcmci_remove(struct platform_device *pdev) 1192d96be879SSascha Hauer { 1193d96be879SSascha Hauer struct mmc_host *mmc = platform_get_drvdata(pdev); 1194d96be879SSascha Hauer struct mxcmci_host *host = mmc_priv(mmc); 1195d96be879SSascha Hauer 1196d96be879SSascha Hauer mmc_remove_host(mmc); 1197d96be879SSascha Hauer 1198d96be879SSascha Hauer if (host->pdata && host->pdata->exit) 1199d96be879SSascha Hauer host->pdata->exit(&pdev->dev, mmc); 1200d96be879SSascha Hauer 1201f53fbde4SSascha Hauer if (host->dma) 1202f53fbde4SSascha Hauer dma_release_channel(host->dma); 1203f53fbde4SSascha Hauer 1204529aa29eSSascha Hauer clk_disable_unprepare(host->clk_per); 1205529aa29eSSascha Hauer clk_disable_unprepare(host->clk_ipg); 1206d96be879SSascha Hauer 1207d96be879SSascha Hauer mmc_free_host(mmc); 1208d96be879SSascha Hauer 1209d96be879SSascha Hauer return 0; 1210d96be879SSascha Hauer } 1211d96be879SSascha Hauer 1212384a81d5SAlexander Shiyan static int __maybe_unused mxcmci_suspend(struct device *dev) 1213d96be879SSascha Hauer { 1214a7d403cfSEric Bénard struct mmc_host *mmc = dev_get_drvdata(dev); 1215a7d403cfSEric Bénard struct mxcmci_host *host = mmc_priv(mmc); 1216d96be879SSascha Hauer 1217529aa29eSSascha Hauer clk_disable_unprepare(host->clk_per); 1218529aa29eSSascha Hauer clk_disable_unprepare(host->clk_ipg); 1219bd190f90SUlf Hansson return 0; 1220d96be879SSascha Hauer } 1221d96be879SSascha Hauer 1222384a81d5SAlexander Shiyan static int __maybe_unused mxcmci_resume(struct device *dev) 1223d96be879SSascha Hauer { 1224a7d403cfSEric Bénard struct mmc_host *mmc = dev_get_drvdata(dev); 1225a7d403cfSEric Bénard struct mxcmci_host *host = mmc_priv(mmc); 1226a2bc74cfSArvind Yadav int ret; 1227d96be879SSascha Hauer 1228a2bc74cfSArvind Yadav ret = clk_prepare_enable(host->clk_per); 1229a2bc74cfSArvind Yadav if (ret) 1230a2bc74cfSArvind Yadav return ret; 1231a2bc74cfSArvind Yadav 1232a2bc74cfSArvind Yadav ret = clk_prepare_enable(host->clk_ipg); 1233a2bc74cfSArvind Yadav if (ret) 1234a2bc74cfSArvind Yadav clk_disable_unprepare(host->clk_per); 1235a2bc74cfSArvind Yadav 1236a2bc74cfSArvind Yadav return ret; 1237d96be879SSascha Hauer } 1238a7d403cfSEric Bénard 1239384a81d5SAlexander Shiyan static SIMPLE_DEV_PM_OPS(mxcmci_pm_ops, mxcmci_suspend, mxcmci_resume); 1240d96be879SSascha Hauer 1241d96be879SSascha Hauer static struct platform_driver mxcmci_driver = { 1242d96be879SSascha Hauer .probe = mxcmci_probe, 1243d96be879SSascha Hauer .remove = mxcmci_remove, 12447f917a8dSShawn Guo .id_table = mxcmci_devtype, 1245d96be879SSascha Hauer .driver = { 1246d96be879SSascha Hauer .name = DRIVER_NAME, 1247a7d403cfSEric Bénard .pm = &mxcmci_pm_ops, 12487ff747c4SMarkus Pargmann .of_match_table = mxcmci_of_match, 1249d96be879SSascha Hauer } 1250d96be879SSascha Hauer }; 1251d96be879SSascha Hauer 1252d1f81a64SAxel Lin module_platform_driver(mxcmci_driver); 1253d96be879SSascha Hauer 1254d96be879SSascha Hauer MODULE_DESCRIPTION("i.MX Multimedia Card Interface Driver"); 1255d96be879SSascha Hauer MODULE_AUTHOR("Sascha Hauer, Pengutronix"); 1256d96be879SSascha Hauer MODULE_LICENSE("GPL"); 12576eb30adfSFabio Estevam MODULE_ALIAS("platform:mxc-mmc"); 1258