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> 24a639bb72SArnd Bergmann #include <linux/highmem.h> 25d96be879SSascha Hauer #include <linux/interrupt.h> 26d96be879SSascha Hauer #include <linux/irq.h> 27d96be879SSascha Hauer #include <linux/blkdev.h> 28d96be879SSascha Hauer #include <linux/dma-mapping.h> 29d96be879SSascha Hauer #include <linux/mmc/host.h> 30d96be879SSascha Hauer #include <linux/mmc/card.h> 31d96be879SSascha Hauer #include <linux/delay.h> 32d96be879SSascha Hauer #include <linux/clk.h> 33d96be879SSascha Hauer #include <linux/io.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> 40bcf53524SAnatolij Gustschin #include <linux/mmc/slot-gpio.h> 41d96be879SSascha Hauer 42d96be879SSascha Hauer #include <asm/dma.h> 43d96be879SSascha Hauer #include <asm/irq.h> 4482906b13SArnd Bergmann #include <linux/platform_data/mmc-mxcmmc.h> 45d96be879SSascha Hauer 4682906b13SArnd Bergmann #include <linux/platform_data/dma-imx.h> 47d96be879SSascha Hauer 489563b1dbSSascha Hauer #define DRIVER_NAME "mxc-mmc" 49f6ad0a48SJavier Martin #define MXCMCI_TIMEOUT_MS 10000 50d96be879SSascha Hauer 51d96be879SSascha Hauer #define MMC_REG_STR_STP_CLK 0x00 52d96be879SSascha Hauer #define MMC_REG_STATUS 0x04 53d96be879SSascha Hauer #define MMC_REG_CLK_RATE 0x08 54d96be879SSascha Hauer #define MMC_REG_CMD_DAT_CONT 0x0C 55d96be879SSascha Hauer #define MMC_REG_RES_TO 0x10 56d96be879SSascha Hauer #define MMC_REG_READ_TO 0x14 57d96be879SSascha Hauer #define MMC_REG_BLK_LEN 0x18 58d96be879SSascha Hauer #define MMC_REG_NOB 0x1C 59d96be879SSascha Hauer #define MMC_REG_REV_NO 0x20 60d96be879SSascha Hauer #define MMC_REG_INT_CNTR 0x24 61d96be879SSascha Hauer #define MMC_REG_CMD 0x28 62d96be879SSascha Hauer #define MMC_REG_ARG 0x2C 63d96be879SSascha Hauer #define MMC_REG_RES_FIFO 0x34 64d96be879SSascha Hauer #define MMC_REG_BUFFER_ACCESS 0x38 65d96be879SSascha Hauer 66d96be879SSascha Hauer #define STR_STP_CLK_RESET (1 << 3) 67d96be879SSascha Hauer #define STR_STP_CLK_START_CLK (1 << 1) 68d96be879SSascha Hauer #define STR_STP_CLK_STOP_CLK (1 << 0) 69d96be879SSascha Hauer 70d96be879SSascha Hauer #define STATUS_CARD_INSERTION (1 << 31) 71d96be879SSascha Hauer #define STATUS_CARD_REMOVAL (1 << 30) 72d96be879SSascha Hauer #define STATUS_YBUF_EMPTY (1 << 29) 73d96be879SSascha Hauer #define STATUS_XBUF_EMPTY (1 << 28) 74d96be879SSascha Hauer #define STATUS_YBUF_FULL (1 << 27) 75d96be879SSascha Hauer #define STATUS_XBUF_FULL (1 << 26) 76d96be879SSascha Hauer #define STATUS_BUF_UND_RUN (1 << 25) 77d96be879SSascha Hauer #define STATUS_BUF_OVFL (1 << 24) 78d96be879SSascha Hauer #define STATUS_SDIO_INT_ACTIVE (1 << 14) 79d96be879SSascha Hauer #define STATUS_END_CMD_RESP (1 << 13) 80d96be879SSascha Hauer #define STATUS_WRITE_OP_DONE (1 << 12) 81d96be879SSascha Hauer #define STATUS_DATA_TRANS_DONE (1 << 11) 82d96be879SSascha Hauer #define STATUS_READ_OP_DONE (1 << 11) 83d96be879SSascha Hauer #define STATUS_WR_CRC_ERROR_CODE_MASK (3 << 10) 84d96be879SSascha Hauer #define STATUS_CARD_BUS_CLK_RUN (1 << 8) 85d96be879SSascha Hauer #define STATUS_BUF_READ_RDY (1 << 7) 86d96be879SSascha Hauer #define STATUS_BUF_WRITE_RDY (1 << 6) 87d96be879SSascha Hauer #define STATUS_RESP_CRC_ERR (1 << 5) 88d96be879SSascha Hauer #define STATUS_CRC_READ_ERR (1 << 3) 89d96be879SSascha Hauer #define STATUS_CRC_WRITE_ERR (1 << 2) 90d96be879SSascha Hauer #define STATUS_TIME_OUT_RESP (1 << 1) 91d96be879SSascha Hauer #define STATUS_TIME_OUT_READ (1 << 0) 92d96be879SSascha Hauer #define STATUS_ERR_MASK 0x2f 93d96be879SSascha Hauer 94d96be879SSascha Hauer #define CMD_DAT_CONT_CMD_RESP_LONG_OFF (1 << 12) 95d96be879SSascha Hauer #define CMD_DAT_CONT_STOP_READWAIT (1 << 11) 96d96be879SSascha Hauer #define CMD_DAT_CONT_START_READWAIT (1 << 10) 97d96be879SSascha Hauer #define CMD_DAT_CONT_BUS_WIDTH_4 (2 << 8) 98d96be879SSascha Hauer #define CMD_DAT_CONT_INIT (1 << 7) 99d96be879SSascha Hauer #define CMD_DAT_CONT_WRITE (1 << 4) 100d96be879SSascha Hauer #define CMD_DAT_CONT_DATA_ENABLE (1 << 3) 101d96be879SSascha Hauer #define CMD_DAT_CONT_RESPONSE_48BIT_CRC (1 << 0) 102d96be879SSascha Hauer #define CMD_DAT_CONT_RESPONSE_136BIT (2 << 0) 103d96be879SSascha Hauer #define CMD_DAT_CONT_RESPONSE_48BIT (3 << 0) 104d96be879SSascha Hauer 105d96be879SSascha Hauer #define INT_SDIO_INT_WKP_EN (1 << 18) 106d96be879SSascha Hauer #define INT_CARD_INSERTION_WKP_EN (1 << 17) 107d96be879SSascha Hauer #define INT_CARD_REMOVAL_WKP_EN (1 << 16) 108d96be879SSascha Hauer #define INT_CARD_INSERTION_EN (1 << 15) 109d96be879SSascha Hauer #define INT_CARD_REMOVAL_EN (1 << 14) 110d96be879SSascha Hauer #define INT_SDIO_IRQ_EN (1 << 13) 111d96be879SSascha Hauer #define INT_DAT0_EN (1 << 12) 112d96be879SSascha Hauer #define INT_BUF_READ_EN (1 << 4) 113d96be879SSascha Hauer #define INT_BUF_WRITE_EN (1 << 3) 114d96be879SSascha Hauer #define INT_END_CMD_RES_EN (1 << 2) 115d96be879SSascha Hauer #define INT_WRITE_OP_DONE_EN (1 << 1) 116d96be879SSascha Hauer #define INT_READ_OP_EN (1 << 0) 117d96be879SSascha Hauer 1187f917a8dSShawn Guo enum mxcmci_type { 1197f917a8dSShawn Guo IMX21_MMC, 1207f917a8dSShawn Guo IMX31_MMC, 121c7ceab02SAnatolij Gustschin MPC512X_MMC, 1227f917a8dSShawn Guo }; 1237f917a8dSShawn Guo 124d96be879SSascha Hauer struct mxcmci_host { 125d96be879SSascha Hauer struct mmc_host *mmc; 126d96be879SSascha Hauer void __iomem *base; 12701e4f958SAlexander Shiyan dma_addr_t phys_base; 128d96be879SSascha Hauer int detect_irq; 129f53fbde4SSascha Hauer struct dma_chan *dma; 130f53fbde4SSascha Hauer struct dma_async_tx_descriptor *desc; 131d96be879SSascha Hauer int do_dma; 13216b3bf8cSEric Bénard int default_irq_mask; 133f441b993SDaniel Mack int use_sdio; 134d96be879SSascha Hauer unsigned int power_mode; 135d96be879SSascha Hauer struct imxmmc_platform_data *pdata; 136d96be879SSascha Hauer 137d96be879SSascha Hauer struct mmc_request *req; 138d96be879SSascha Hauer struct mmc_command *cmd; 139d96be879SSascha Hauer struct mmc_data *data; 140d96be879SSascha Hauer 141d96be879SSascha Hauer unsigned int datasize; 142d96be879SSascha Hauer unsigned int dma_dir; 143d96be879SSascha Hauer 144d96be879SSascha Hauer u16 rev_no; 145d96be879SSascha Hauer unsigned int cmdat; 146d96be879SSascha Hauer 147529aa29eSSascha Hauer struct clk *clk_ipg; 148529aa29eSSascha Hauer struct clk *clk_per; 149d96be879SSascha Hauer 150d96be879SSascha Hauer int clock; 151d96be879SSascha Hauer 152d96be879SSascha Hauer struct work_struct datawork; 153f441b993SDaniel Mack spinlock_t lock; 15474b66954SAlberto Panizzo 155f53fbde4SSascha Hauer int burstlen; 156f53fbde4SSascha Hauer int dmareq; 157f53fbde4SSascha Hauer struct dma_slave_config dma_slave_config; 158f53fbde4SSascha Hauer struct imx_dma_data dma_data; 159f6ad0a48SJavier Martin 160f6ad0a48SJavier Martin struct timer_list watchdog; 1617f917a8dSShawn Guo enum mxcmci_type devtype; 162d96be879SSascha Hauer }; 163d96be879SSascha Hauer 16442477053SAnatolij Gustschin static const struct platform_device_id mxcmci_devtype[] = { 1657f917a8dSShawn Guo { 1667f917a8dSShawn Guo .name = "imx21-mmc", 1677f917a8dSShawn Guo .driver_data = IMX21_MMC, 1687f917a8dSShawn Guo }, { 1697f917a8dSShawn Guo .name = "imx31-mmc", 1707f917a8dSShawn Guo .driver_data = IMX31_MMC, 1717f917a8dSShawn Guo }, { 172c7ceab02SAnatolij Gustschin .name = "mpc512x-sdhc", 173c7ceab02SAnatolij Gustschin .driver_data = MPC512X_MMC, 174c7ceab02SAnatolij Gustschin }, { 1757f917a8dSShawn Guo /* sentinel */ 1767f917a8dSShawn Guo } 1777f917a8dSShawn Guo }; 1787f917a8dSShawn Guo MODULE_DEVICE_TABLE(platform, mxcmci_devtype); 1797f917a8dSShawn Guo 1807ff747c4SMarkus Pargmann static const struct of_device_id mxcmci_of_match[] = { 1817ff747c4SMarkus Pargmann { 1827ff747c4SMarkus Pargmann .compatible = "fsl,imx21-mmc", 1837ff747c4SMarkus Pargmann .data = &mxcmci_devtype[IMX21_MMC], 1847ff747c4SMarkus Pargmann }, { 1857ff747c4SMarkus Pargmann .compatible = "fsl,imx31-mmc", 1867ff747c4SMarkus Pargmann .data = &mxcmci_devtype[IMX31_MMC], 1877ff747c4SMarkus Pargmann }, { 188c7ceab02SAnatolij Gustschin .compatible = "fsl,mpc5121-sdhc", 189c7ceab02SAnatolij Gustschin .data = &mxcmci_devtype[MPC512X_MMC], 190c7ceab02SAnatolij Gustschin }, { 1917ff747c4SMarkus Pargmann /* sentinel */ 1927ff747c4SMarkus Pargmann } 1937ff747c4SMarkus Pargmann }; 1947ff747c4SMarkus Pargmann MODULE_DEVICE_TABLE(of, mxcmci_of_match); 1957ff747c4SMarkus Pargmann 1967f917a8dSShawn Guo static inline int is_imx31_mmc(struct mxcmci_host *host) 1977f917a8dSShawn Guo { 1987f917a8dSShawn Guo return host->devtype == IMX31_MMC; 1997f917a8dSShawn Guo } 2007f917a8dSShawn Guo 201c7ceab02SAnatolij Gustschin static inline int is_mpc512x_mmc(struct mxcmci_host *host) 202c7ceab02SAnatolij Gustschin { 203c7ceab02SAnatolij Gustschin return host->devtype == MPC512X_MMC; 204c7ceab02SAnatolij Gustschin } 205c7ceab02SAnatolij Gustschin 206c7ceab02SAnatolij Gustschin static inline u32 mxcmci_readl(struct mxcmci_host *host, int reg) 207c7ceab02SAnatolij Gustschin { 208c7ceab02SAnatolij Gustschin if (IS_ENABLED(CONFIG_PPC_MPC512x)) 209c7ceab02SAnatolij Gustschin return ioread32be(host->base + reg); 210c7ceab02SAnatolij Gustschin else 211c7ceab02SAnatolij Gustschin return readl(host->base + reg); 212c7ceab02SAnatolij Gustschin } 213c7ceab02SAnatolij Gustschin 214c7ceab02SAnatolij Gustschin static inline void mxcmci_writel(struct mxcmci_host *host, u32 val, int reg) 215c7ceab02SAnatolij Gustschin { 216c7ceab02SAnatolij Gustschin if (IS_ENABLED(CONFIG_PPC_MPC512x)) 217c7ceab02SAnatolij Gustschin iowrite32be(val, host->base + reg); 218c7ceab02SAnatolij Gustschin else 219c7ceab02SAnatolij Gustschin writel(val, host->base + reg); 220c7ceab02SAnatolij Gustschin } 221c7ceab02SAnatolij Gustschin 222c7ceab02SAnatolij Gustschin static inline u16 mxcmci_readw(struct mxcmci_host *host, int reg) 223c7ceab02SAnatolij Gustschin { 224c7ceab02SAnatolij Gustschin if (IS_ENABLED(CONFIG_PPC_MPC512x)) 225c7ceab02SAnatolij Gustschin return ioread32be(host->base + reg); 226c7ceab02SAnatolij Gustschin else 227c7ceab02SAnatolij Gustschin return readw(host->base + reg); 228c7ceab02SAnatolij Gustschin } 229c7ceab02SAnatolij Gustschin 230c7ceab02SAnatolij Gustschin static inline void mxcmci_writew(struct mxcmci_host *host, u16 val, int reg) 231c7ceab02SAnatolij Gustschin { 232c7ceab02SAnatolij Gustschin if (IS_ENABLED(CONFIG_PPC_MPC512x)) 233c7ceab02SAnatolij Gustschin iowrite32be(val, host->base + reg); 234c7ceab02SAnatolij Gustschin else 235c7ceab02SAnatolij Gustschin writew(val, host->base + reg); 236c7ceab02SAnatolij Gustschin } 237c7ceab02SAnatolij Gustschin 23818489fa2SMartin Fuzzey static void mxcmci_set_clk_rate(struct mxcmci_host *host, unsigned int clk_ios); 23918489fa2SMartin Fuzzey 240bc3c1771SAlexander Shiyan static void mxcmci_set_power(struct mxcmci_host *host, unsigned int vdd) 24174b66954SAlberto Panizzo { 242bc3c1771SAlexander Shiyan if (!IS_ERR(host->mmc->supply.vmmc)) { 243bc3c1771SAlexander Shiyan if (host->power_mode == MMC_POWER_UP) 244bc3c1771SAlexander Shiyan mmc_regulator_set_ocr(host->mmc, 245bc3c1771SAlexander Shiyan host->mmc->supply.vmmc, vdd); 246bc3c1771SAlexander Shiyan else if (host->power_mode == MMC_POWER_OFF) 247bc3c1771SAlexander Shiyan mmc_regulator_set_ocr(host->mmc, 248bc3c1771SAlexander Shiyan host->mmc->supply.vmmc, 0); 249d078d242SAlberto Panizzo } 250d078d242SAlberto Panizzo 25174b66954SAlberto Panizzo if (host->pdata && host->pdata->setpower) 25274b66954SAlberto Panizzo host->pdata->setpower(mmc_dev(host->mmc), vdd); 25374b66954SAlberto Panizzo } 25474b66954SAlberto Panizzo 255d96be879SSascha Hauer static inline int mxcmci_use_dma(struct mxcmci_host *host) 256d96be879SSascha Hauer { 257d96be879SSascha Hauer return host->do_dma; 258d96be879SSascha Hauer } 259d96be879SSascha Hauer 260d96be879SSascha Hauer static void mxcmci_softreset(struct mxcmci_host *host) 261d96be879SSascha Hauer { 262d96be879SSascha Hauer int i; 263d96be879SSascha Hauer 2644725f6f1SDaniel Mack dev_dbg(mmc_dev(host->mmc), "mxcmci_softreset\n"); 2654725f6f1SDaniel Mack 266d96be879SSascha Hauer /* reset sequence */ 267c7ceab02SAnatolij Gustschin mxcmci_writew(host, STR_STP_CLK_RESET, MMC_REG_STR_STP_CLK); 268c7ceab02SAnatolij Gustschin mxcmci_writew(host, STR_STP_CLK_RESET | STR_STP_CLK_START_CLK, 269c7ceab02SAnatolij Gustschin MMC_REG_STR_STP_CLK); 270d96be879SSascha Hauer 271d96be879SSascha Hauer for (i = 0; i < 8; i++) 272c7ceab02SAnatolij Gustschin mxcmci_writew(host, STR_STP_CLK_START_CLK, MMC_REG_STR_STP_CLK); 273d96be879SSascha Hauer 274c7ceab02SAnatolij Gustschin mxcmci_writew(host, 0xff, MMC_REG_RES_TO); 275d96be879SSascha Hauer } 276d96be879SSascha Hauer 277e48fc15aSAnatolij Gustschin #if IS_ENABLED(CONFIG_PPC_MPC512x) 278e48fc15aSAnatolij Gustschin static inline void buffer_swap32(u32 *buf, int len) 279e48fc15aSAnatolij Gustschin { 280e48fc15aSAnatolij Gustschin int i; 281e48fc15aSAnatolij Gustschin 282e48fc15aSAnatolij Gustschin for (i = 0; i < ((len + 3) / 4); i++) { 2837a8bf874SDavid Gibson *buf = swab32(*buf); 284e48fc15aSAnatolij Gustschin buf++; 285e48fc15aSAnatolij Gustschin } 286e48fc15aSAnatolij Gustschin } 287e48fc15aSAnatolij Gustschin 288e48fc15aSAnatolij Gustschin static void mxcmci_swap_buffers(struct mmc_data *data) 289e48fc15aSAnatolij Gustschin { 290e48fc15aSAnatolij Gustschin struct scatterlist *sg; 291e48fc15aSAnatolij Gustschin int i; 292e48fc15aSAnatolij Gustschin 2932b77158fSAlexander Shiyan for_each_sg(data->sg, sg, data->sg_len, i) 2942b77158fSAlexander Shiyan buffer_swap32(sg_virt(sg), sg->length); 2953b1074bfSKees Cook } 296e48fc15aSAnatolij Gustschin #else 297e48fc15aSAnatolij Gustschin static inline void mxcmci_swap_buffers(struct mmc_data *data) {} 298e48fc15aSAnatolij Gustschin #endif 299e48fc15aSAnatolij Gustschin 300656217d2SMartin Fuzzey static int mxcmci_setup_data(struct mxcmci_host *host, struct mmc_data *data) 301d96be879SSascha Hauer { 302d96be879SSascha Hauer unsigned int nob = data->blocks; 303d96be879SSascha Hauer unsigned int blksz = data->blksz; 304d96be879SSascha Hauer unsigned int datasize = nob * blksz; 305d96be879SSascha Hauer struct scatterlist *sg; 30605f5799cSVinod Koul enum dma_transfer_direction slave_dirn; 307f53fbde4SSascha Hauer int i, nents; 308f53fbde4SSascha Hauer 309d96be879SSascha Hauer host->data = data; 310d96be879SSascha Hauer data->bytes_xfered = 0; 311d96be879SSascha Hauer 312c7ceab02SAnatolij Gustschin mxcmci_writew(host, nob, MMC_REG_NOB); 313c7ceab02SAnatolij Gustschin mxcmci_writew(host, blksz, MMC_REG_BLK_LEN); 314d96be879SSascha Hauer host->datasize = datasize; 315d96be879SSascha Hauer 316f53fbde4SSascha Hauer if (!mxcmci_use_dma(host)) 317f53fbde4SSascha Hauer return 0; 318f53fbde4SSascha Hauer 319d96be879SSascha Hauer for_each_sg(data->sg, sg, data->sg_len, i) { 3202cb53552SJavier Martin if (sg->offset & 3 || sg->length & 3 || sg->length < 512) { 321d96be879SSascha Hauer host->do_dma = 0; 322656217d2SMartin Fuzzey return 0; 323d96be879SSascha Hauer } 324d96be879SSascha Hauer } 325d96be879SSascha Hauer 32605f5799cSVinod Koul if (data->flags & MMC_DATA_READ) { 327d96be879SSascha Hauer host->dma_dir = DMA_FROM_DEVICE; 32805f5799cSVinod Koul slave_dirn = DMA_DEV_TO_MEM; 32905f5799cSVinod Koul } else { 330d96be879SSascha Hauer host->dma_dir = DMA_TO_DEVICE; 33105f5799cSVinod Koul slave_dirn = DMA_MEM_TO_DEV; 332e48fc15aSAnatolij Gustschin 333e48fc15aSAnatolij Gustschin mxcmci_swap_buffers(data); 33405f5799cSVinod Koul } 335f53fbde4SSascha Hauer 336f53fbde4SSascha Hauer nents = dma_map_sg(host->dma->device->dev, data->sg, 337d96be879SSascha Hauer data->sg_len, host->dma_dir); 338f53fbde4SSascha Hauer if (nents != data->sg_len) 339f53fbde4SSascha Hauer return -EINVAL; 340d96be879SSascha Hauer 34116052827SAlexandre Bounine host->desc = dmaengine_prep_slave_sg(host->dma, 34205f5799cSVinod Koul data->sg, data->sg_len, slave_dirn, 343f53fbde4SSascha Hauer DMA_PREP_INTERRUPT | DMA_CTRL_ACK); 344d96be879SSascha Hauer 345f53fbde4SSascha Hauer if (!host->desc) { 346f53fbde4SSascha Hauer dma_unmap_sg(host->dma->device->dev, data->sg, data->sg_len, 347f53fbde4SSascha Hauer host->dma_dir); 348f53fbde4SSascha Hauer host->do_dma = 0; 349f53fbde4SSascha Hauer return 0; /* Fall back to PIO */ 350656217d2SMartin Fuzzey } 351d96be879SSascha Hauer wmb(); 352d96be879SSascha Hauer 353f53fbde4SSascha Hauer dmaengine_submit(host->desc); 354439aa0efSSascha Hauer dma_async_issue_pending(host->dma); 355f53fbde4SSascha Hauer 356f6ad0a48SJavier Martin mod_timer(&host->watchdog, jiffies + msecs_to_jiffies(MXCMCI_TIMEOUT_MS)); 357f6ad0a48SJavier Martin 358656217d2SMartin Fuzzey return 0; 359d96be879SSascha Hauer } 360d96be879SSascha Hauer 361f6ad0a48SJavier Martin static void mxcmci_cmd_done(struct mxcmci_host *host, unsigned int stat); 362f6ad0a48SJavier Martin static void mxcmci_data_done(struct mxcmci_host *host, unsigned int stat); 363f6ad0a48SJavier Martin 364f6ad0a48SJavier Martin static void mxcmci_dma_callback(void *data) 365f6ad0a48SJavier Martin { 366f6ad0a48SJavier Martin struct mxcmci_host *host = data; 367f6ad0a48SJavier Martin u32 stat; 368f6ad0a48SJavier Martin 369f6ad0a48SJavier Martin del_timer(&host->watchdog); 370f6ad0a48SJavier Martin 371c7ceab02SAnatolij Gustschin stat = mxcmci_readl(host, MMC_REG_STATUS); 372f6ad0a48SJavier Martin 373f6ad0a48SJavier Martin dev_dbg(mmc_dev(host->mmc), "%s: 0x%08x\n", __func__, stat); 374f6ad0a48SJavier Martin 375f6ad0a48SJavier Martin mxcmci_data_done(host, stat); 376f6ad0a48SJavier Martin } 377f6ad0a48SJavier Martin 378d96be879SSascha Hauer static int mxcmci_start_cmd(struct mxcmci_host *host, struct mmc_command *cmd, 379d96be879SSascha Hauer unsigned int cmdat) 380d96be879SSascha Hauer { 38116b3bf8cSEric Bénard u32 int_cntr = host->default_irq_mask; 382f441b993SDaniel Mack unsigned long flags; 383f441b993SDaniel Mack 384d96be879SSascha Hauer WARN_ON(host->cmd != NULL); 385d96be879SSascha Hauer host->cmd = cmd; 386d96be879SSascha Hauer 387d96be879SSascha Hauer switch (mmc_resp_type(cmd)) { 388d96be879SSascha Hauer case MMC_RSP_R1: /* short CRC, OPCODE */ 389d96be879SSascha Hauer case MMC_RSP_R1B:/* short CRC, OPCODE, BUSY */ 390d96be879SSascha Hauer cmdat |= CMD_DAT_CONT_RESPONSE_48BIT_CRC; 391d96be879SSascha Hauer break; 392d96be879SSascha Hauer case MMC_RSP_R2: /* long 136 bit + CRC */ 393d96be879SSascha Hauer cmdat |= CMD_DAT_CONT_RESPONSE_136BIT; 394d96be879SSascha Hauer break; 395d96be879SSascha Hauer case MMC_RSP_R3: /* short */ 396d96be879SSascha Hauer cmdat |= CMD_DAT_CONT_RESPONSE_48BIT; 397d96be879SSascha Hauer break; 398d96be879SSascha Hauer case MMC_RSP_NONE: 399d96be879SSascha Hauer break; 400d96be879SSascha Hauer default: 401d96be879SSascha Hauer dev_err(mmc_dev(host->mmc), "unhandled response type 0x%x\n", 402d96be879SSascha Hauer mmc_resp_type(cmd)); 403d96be879SSascha Hauer cmd->error = -EINVAL; 404d96be879SSascha Hauer return -EINVAL; 405d96be879SSascha Hauer } 406d96be879SSascha Hauer 407f441b993SDaniel Mack int_cntr = INT_END_CMD_RES_EN; 408f441b993SDaniel Mack 409f6ad0a48SJavier Martin if (mxcmci_use_dma(host)) { 410f6ad0a48SJavier Martin if (host->dma_dir == DMA_FROM_DEVICE) { 411f6ad0a48SJavier Martin host->desc->callback = mxcmci_dma_callback; 412f6ad0a48SJavier Martin host->desc->callback_param = host; 413f6ad0a48SJavier Martin } else { 414f6ad0a48SJavier Martin int_cntr |= INT_WRITE_OP_DONE_EN; 415f6ad0a48SJavier Martin } 416f6ad0a48SJavier Martin } 417f441b993SDaniel Mack 418f441b993SDaniel Mack spin_lock_irqsave(&host->lock, flags); 419f441b993SDaniel Mack if (host->use_sdio) 420f441b993SDaniel Mack int_cntr |= INT_SDIO_IRQ_EN; 421c7ceab02SAnatolij Gustschin mxcmci_writel(host, int_cntr, MMC_REG_INT_CNTR); 422f441b993SDaniel Mack spin_unlock_irqrestore(&host->lock, flags); 423d96be879SSascha Hauer 424c7ceab02SAnatolij Gustschin mxcmci_writew(host, cmd->opcode, MMC_REG_CMD); 425c7ceab02SAnatolij Gustschin mxcmci_writel(host, cmd->arg, MMC_REG_ARG); 426c7ceab02SAnatolij Gustschin mxcmci_writew(host, cmdat, MMC_REG_CMD_DAT_CONT); 427d96be879SSascha Hauer 428d96be879SSascha Hauer return 0; 429d96be879SSascha Hauer } 430d96be879SSascha Hauer 431d96be879SSascha Hauer static void mxcmci_finish_request(struct mxcmci_host *host, 432d96be879SSascha Hauer struct mmc_request *req) 433d96be879SSascha Hauer { 43416b3bf8cSEric Bénard u32 int_cntr = host->default_irq_mask; 435f441b993SDaniel Mack unsigned long flags; 436f441b993SDaniel Mack 437f441b993SDaniel Mack spin_lock_irqsave(&host->lock, flags); 438f441b993SDaniel Mack if (host->use_sdio) 439f441b993SDaniel Mack int_cntr |= INT_SDIO_IRQ_EN; 440c7ceab02SAnatolij Gustschin mxcmci_writel(host, int_cntr, MMC_REG_INT_CNTR); 441f441b993SDaniel Mack spin_unlock_irqrestore(&host->lock, flags); 442d96be879SSascha Hauer 443d96be879SSascha Hauer host->req = NULL; 444d96be879SSascha Hauer host->cmd = NULL; 445d96be879SSascha Hauer host->data = NULL; 446d96be879SSascha Hauer 447d96be879SSascha Hauer mmc_request_done(host->mmc, req); 448d96be879SSascha Hauer } 449d96be879SSascha Hauer 450d96be879SSascha Hauer static int mxcmci_finish_data(struct mxcmci_host *host, unsigned int stat) 451d96be879SSascha Hauer { 452d96be879SSascha Hauer struct mmc_data *data = host->data; 453d96be879SSascha Hauer int data_error; 454d96be879SSascha Hauer 455e48fc15aSAnatolij Gustschin if (mxcmci_use_dma(host)) { 456f53fbde4SSascha Hauer dma_unmap_sg(host->dma->device->dev, data->sg, data->sg_len, 457d96be879SSascha Hauer host->dma_dir); 458e48fc15aSAnatolij Gustschin mxcmci_swap_buffers(data); 459e48fc15aSAnatolij Gustschin } 460d96be879SSascha Hauer 461d96be879SSascha Hauer if (stat & STATUS_ERR_MASK) { 462d96be879SSascha Hauer dev_dbg(mmc_dev(host->mmc), "request failed. status: 0x%08x\n", 463d96be879SSascha Hauer stat); 464d96be879SSascha Hauer if (stat & STATUS_CRC_READ_ERR) { 4654725f6f1SDaniel Mack dev_err(mmc_dev(host->mmc), "%s: -EILSEQ\n", __func__); 466d96be879SSascha Hauer data->error = -EILSEQ; 467d96be879SSascha Hauer } else if (stat & STATUS_CRC_WRITE_ERR) { 468d96be879SSascha Hauer u32 err_code = (stat >> 9) & 0x3; 4694725f6f1SDaniel Mack if (err_code == 2) { /* No CRC response */ 4704725f6f1SDaniel Mack dev_err(mmc_dev(host->mmc), 4714725f6f1SDaniel Mack "%s: No CRC -ETIMEDOUT\n", __func__); 472d96be879SSascha Hauer data->error = -ETIMEDOUT; 473d96be879SSascha Hauer } else { 4744725f6f1SDaniel Mack dev_err(mmc_dev(host->mmc), 4754725f6f1SDaniel Mack "%s: -EILSEQ\n", __func__); 4764725f6f1SDaniel Mack data->error = -EILSEQ; 4774725f6f1SDaniel Mack } 4784725f6f1SDaniel Mack } else if (stat & STATUS_TIME_OUT_READ) { 4794725f6f1SDaniel Mack dev_err(mmc_dev(host->mmc), 4804725f6f1SDaniel Mack "%s: read -ETIMEDOUT\n", __func__); 4814725f6f1SDaniel Mack data->error = -ETIMEDOUT; 4824725f6f1SDaniel Mack } else { 4834725f6f1SDaniel Mack dev_err(mmc_dev(host->mmc), "%s: -EIO\n", __func__); 484d96be879SSascha Hauer data->error = -EIO; 485d96be879SSascha Hauer } 486d96be879SSascha Hauer } else { 487d96be879SSascha Hauer data->bytes_xfered = host->datasize; 488d96be879SSascha Hauer } 489d96be879SSascha Hauer 490d96be879SSascha Hauer data_error = data->error; 491d96be879SSascha Hauer 492d96be879SSascha Hauer host->data = NULL; 493d96be879SSascha Hauer 494d96be879SSascha Hauer return data_error; 495d96be879SSascha Hauer } 496d96be879SSascha Hauer 497d96be879SSascha Hauer static void mxcmci_read_response(struct mxcmci_host *host, unsigned int stat) 498d96be879SSascha Hauer { 499d96be879SSascha Hauer struct mmc_command *cmd = host->cmd; 500d96be879SSascha Hauer int i; 501d96be879SSascha Hauer u32 a, b, c; 502d96be879SSascha Hauer 503d96be879SSascha Hauer if (!cmd) 504d96be879SSascha Hauer return; 505d96be879SSascha Hauer 506d96be879SSascha Hauer if (stat & STATUS_TIME_OUT_RESP) { 507d96be879SSascha Hauer dev_dbg(mmc_dev(host->mmc), "CMD TIMEOUT\n"); 508d96be879SSascha Hauer cmd->error = -ETIMEDOUT; 509d96be879SSascha Hauer } else if (stat & STATUS_RESP_CRC_ERR && cmd->flags & MMC_RSP_CRC) { 510d96be879SSascha Hauer dev_dbg(mmc_dev(host->mmc), "cmd crc error\n"); 511d96be879SSascha Hauer cmd->error = -EILSEQ; 512d96be879SSascha Hauer } 513d96be879SSascha Hauer 514d96be879SSascha Hauer if (cmd->flags & MMC_RSP_PRESENT) { 515d96be879SSascha Hauer if (cmd->flags & MMC_RSP_136) { 516d96be879SSascha Hauer for (i = 0; i < 4; i++) { 517c7ceab02SAnatolij Gustschin a = mxcmci_readw(host, MMC_REG_RES_FIFO); 518c7ceab02SAnatolij Gustschin b = mxcmci_readw(host, MMC_REG_RES_FIFO); 519d96be879SSascha Hauer cmd->resp[i] = a << 16 | b; 520d96be879SSascha Hauer } 521d96be879SSascha Hauer } else { 522c7ceab02SAnatolij Gustschin a = mxcmci_readw(host, MMC_REG_RES_FIFO); 523c7ceab02SAnatolij Gustschin b = mxcmci_readw(host, MMC_REG_RES_FIFO); 524c7ceab02SAnatolij Gustschin c = mxcmci_readw(host, MMC_REG_RES_FIFO); 525d96be879SSascha Hauer cmd->resp[0] = a << 24 | b << 8 | c >> 8; 526d96be879SSascha Hauer } 527d96be879SSascha Hauer } 528d96be879SSascha Hauer } 529d96be879SSascha Hauer 530d96be879SSascha Hauer static int mxcmci_poll_status(struct mxcmci_host *host, u32 mask) 531d96be879SSascha Hauer { 532d96be879SSascha Hauer u32 stat; 533d96be879SSascha Hauer unsigned long timeout = jiffies + HZ; 534d96be879SSascha Hauer 535d96be879SSascha Hauer do { 536c7ceab02SAnatolij Gustschin stat = mxcmci_readl(host, MMC_REG_STATUS); 537d96be879SSascha Hauer if (stat & STATUS_ERR_MASK) 538d96be879SSascha Hauer return stat; 53918489fa2SMartin Fuzzey if (time_after(jiffies, timeout)) { 54018489fa2SMartin Fuzzey mxcmci_softreset(host); 54118489fa2SMartin Fuzzey mxcmci_set_clk_rate(host, host->clock); 542d96be879SSascha Hauer return STATUS_TIME_OUT_READ; 54318489fa2SMartin Fuzzey } 544d96be879SSascha Hauer if (stat & mask) 545d96be879SSascha Hauer return 0; 546d96be879SSascha Hauer cpu_relax(); 547d96be879SSascha Hauer } while (1); 548d96be879SSascha Hauer } 549d96be879SSascha Hauer 550d96be879SSascha Hauer static int mxcmci_pull(struct mxcmci_host *host, void *_buf, int bytes) 551d96be879SSascha Hauer { 552d96be879SSascha Hauer unsigned int stat; 553d96be879SSascha Hauer u32 *buf = _buf; 554d96be879SSascha Hauer 555d96be879SSascha Hauer while (bytes > 3) { 556d96be879SSascha Hauer stat = mxcmci_poll_status(host, 557d96be879SSascha Hauer STATUS_BUF_READ_RDY | STATUS_READ_OP_DONE); 558d96be879SSascha Hauer if (stat) 559d96be879SSascha Hauer return stat; 560c7ceab02SAnatolij Gustschin *buf++ = cpu_to_le32(mxcmci_readl(host, MMC_REG_BUFFER_ACCESS)); 561d96be879SSascha Hauer bytes -= 4; 562d96be879SSascha Hauer } 563d96be879SSascha Hauer 564d96be879SSascha Hauer if (bytes) { 565d96be879SSascha Hauer u8 *b = (u8 *)buf; 566d96be879SSascha Hauer u32 tmp; 567d96be879SSascha Hauer 568d96be879SSascha Hauer stat = mxcmci_poll_status(host, 569d96be879SSascha Hauer STATUS_BUF_READ_RDY | STATUS_READ_OP_DONE); 570d96be879SSascha Hauer if (stat) 571d96be879SSascha Hauer return stat; 572c7ceab02SAnatolij Gustschin tmp = cpu_to_le32(mxcmci_readl(host, MMC_REG_BUFFER_ACCESS)); 573d96be879SSascha Hauer memcpy(b, &tmp, bytes); 574d96be879SSascha Hauer } 575d96be879SSascha Hauer 576d96be879SSascha Hauer return 0; 577d96be879SSascha Hauer } 578d96be879SSascha Hauer 579d96be879SSascha Hauer static int mxcmci_push(struct mxcmci_host *host, void *_buf, int bytes) 580d96be879SSascha Hauer { 581d96be879SSascha Hauer unsigned int stat; 582d96be879SSascha Hauer u32 *buf = _buf; 583d96be879SSascha Hauer 584d96be879SSascha Hauer while (bytes > 3) { 585d96be879SSascha Hauer stat = mxcmci_poll_status(host, STATUS_BUF_WRITE_RDY); 586d96be879SSascha Hauer if (stat) 587d96be879SSascha Hauer return stat; 588c7ceab02SAnatolij Gustschin mxcmci_writel(host, cpu_to_le32(*buf++), MMC_REG_BUFFER_ACCESS); 589d96be879SSascha Hauer bytes -= 4; 590d96be879SSascha Hauer } 591d96be879SSascha Hauer 592d96be879SSascha Hauer if (bytes) { 593d96be879SSascha Hauer u8 *b = (u8 *)buf; 594d96be879SSascha Hauer u32 tmp; 595d96be879SSascha Hauer 596d96be879SSascha Hauer stat = mxcmci_poll_status(host, STATUS_BUF_WRITE_RDY); 597d96be879SSascha Hauer if (stat) 598d96be879SSascha Hauer return stat; 599d96be879SSascha Hauer 600d96be879SSascha Hauer memcpy(&tmp, b, bytes); 601c7ceab02SAnatolij Gustschin mxcmci_writel(host, cpu_to_le32(tmp), MMC_REG_BUFFER_ACCESS); 602d96be879SSascha Hauer } 603d96be879SSascha Hauer 6046d916416SFabio Estevam return mxcmci_poll_status(host, STATUS_BUF_WRITE_RDY); 605d96be879SSascha Hauer } 606d96be879SSascha Hauer 607d96be879SSascha Hauer static int mxcmci_transfer_data(struct mxcmci_host *host) 608d96be879SSascha Hauer { 609d96be879SSascha Hauer struct mmc_data *data = host->req->data; 610d96be879SSascha Hauer struct scatterlist *sg; 611d96be879SSascha Hauer int stat, i; 612d96be879SSascha Hauer 613d96be879SSascha Hauer host->data = data; 614d96be879SSascha Hauer host->datasize = 0; 615d96be879SSascha Hauer 616d96be879SSascha Hauer if (data->flags & MMC_DATA_READ) { 617d96be879SSascha Hauer for_each_sg(data->sg, sg, data->sg_len, i) { 6182b77158fSAlexander Shiyan stat = mxcmci_pull(host, sg_virt(sg), sg->length); 619d96be879SSascha Hauer if (stat) 620d96be879SSascha Hauer return stat; 621d96be879SSascha Hauer host->datasize += sg->length; 622d96be879SSascha Hauer } 623d96be879SSascha Hauer } else { 624d96be879SSascha Hauer for_each_sg(data->sg, sg, data->sg_len, i) { 6252b77158fSAlexander Shiyan stat = mxcmci_push(host, sg_virt(sg), sg->length); 626d96be879SSascha Hauer if (stat) 627d96be879SSascha Hauer return stat; 628d96be879SSascha Hauer host->datasize += sg->length; 629d96be879SSascha Hauer } 630d96be879SSascha Hauer stat = mxcmci_poll_status(host, STATUS_WRITE_OP_DONE); 631d96be879SSascha Hauer if (stat) 632d96be879SSascha Hauer return stat; 633d96be879SSascha Hauer } 634d96be879SSascha Hauer return 0; 635d96be879SSascha Hauer } 636d96be879SSascha Hauer 637d96be879SSascha Hauer static void mxcmci_datawork(struct work_struct *work) 638d96be879SSascha Hauer { 639d96be879SSascha Hauer struct mxcmci_host *host = container_of(work, struct mxcmci_host, 640d96be879SSascha Hauer datawork); 641d96be879SSascha Hauer int datastat = mxcmci_transfer_data(host); 6424a31f2efSDaniel Mack 643c7ceab02SAnatolij Gustschin mxcmci_writel(host, STATUS_READ_OP_DONE | STATUS_WRITE_OP_DONE, 644c7ceab02SAnatolij Gustschin MMC_REG_STATUS); 645d96be879SSascha Hauer mxcmci_finish_data(host, datastat); 646d96be879SSascha Hauer 647d96be879SSascha Hauer if (host->req->stop) { 648d96be879SSascha Hauer if (mxcmci_start_cmd(host, host->req->stop, 0)) { 649d96be879SSascha Hauer mxcmci_finish_request(host, host->req); 650d96be879SSascha Hauer return; 651d96be879SSascha Hauer } 652d96be879SSascha Hauer } else { 653d96be879SSascha Hauer mxcmci_finish_request(host, host->req); 654d96be879SSascha Hauer } 655d96be879SSascha Hauer } 656d96be879SSascha Hauer 657d96be879SSascha Hauer static void mxcmci_data_done(struct mxcmci_host *host, unsigned int stat) 658d96be879SSascha Hauer { 65970aa6109SAnatolij Gustschin struct mmc_request *req; 660d96be879SSascha Hauer int data_error; 66170aa6109SAnatolij Gustschin unsigned long flags; 662d96be879SSascha Hauer 66370aa6109SAnatolij Gustschin spin_lock_irqsave(&host->lock, flags); 66470aa6109SAnatolij Gustschin 66570aa6109SAnatolij Gustschin if (!host->data) { 66670aa6109SAnatolij Gustschin spin_unlock_irqrestore(&host->lock, flags); 667d96be879SSascha Hauer return; 66870aa6109SAnatolij Gustschin } 66970aa6109SAnatolij Gustschin 67070aa6109SAnatolij Gustschin if (!host->req) { 67170aa6109SAnatolij Gustschin spin_unlock_irqrestore(&host->lock, flags); 67270aa6109SAnatolij Gustschin return; 67370aa6109SAnatolij Gustschin } 67470aa6109SAnatolij Gustschin 67570aa6109SAnatolij Gustschin req = host->req; 67670aa6109SAnatolij Gustschin if (!req->stop) 67770aa6109SAnatolij Gustschin host->req = NULL; /* we will handle finish req below */ 678d96be879SSascha Hauer 679d96be879SSascha Hauer data_error = mxcmci_finish_data(host, stat); 680d96be879SSascha Hauer 68170aa6109SAnatolij Gustschin spin_unlock_irqrestore(&host->lock, flags); 68270aa6109SAnatolij Gustschin 68309954ea9SShawn Lin if (data_error) 68409954ea9SShawn Lin return; 68509954ea9SShawn Lin 686d96be879SSascha Hauer mxcmci_read_response(host, stat); 687d96be879SSascha Hauer host->cmd = NULL; 688d96be879SSascha Hauer 68970aa6109SAnatolij Gustschin if (req->stop) { 69070aa6109SAnatolij Gustschin if (mxcmci_start_cmd(host, req->stop, 0)) { 69170aa6109SAnatolij Gustschin mxcmci_finish_request(host, req); 692d96be879SSascha Hauer return; 693d96be879SSascha Hauer } 694d96be879SSascha Hauer } else { 69570aa6109SAnatolij Gustschin mxcmci_finish_request(host, req); 696d96be879SSascha Hauer } 697d96be879SSascha Hauer } 698d96be879SSascha Hauer 699d96be879SSascha Hauer static void mxcmci_cmd_done(struct mxcmci_host *host, unsigned int stat) 700d96be879SSascha Hauer { 701d96be879SSascha Hauer mxcmci_read_response(host, stat); 702d96be879SSascha Hauer host->cmd = NULL; 703d96be879SSascha Hauer 704d96be879SSascha Hauer if (!host->data && host->req) { 705d96be879SSascha Hauer mxcmci_finish_request(host, host->req); 706d96be879SSascha Hauer return; 707d96be879SSascha Hauer } 708d96be879SSascha Hauer 709d96be879SSascha Hauer /* For the DMA case the DMA engine handles the data transfer 710fd589a8fSAnand Gadiyar * automatically. For non DMA we have to do it ourselves. 711d96be879SSascha Hauer * Don't do it in interrupt context though. 712d96be879SSascha Hauer */ 713d96be879SSascha Hauer if (!mxcmci_use_dma(host) && host->data) 714d96be879SSascha Hauer schedule_work(&host->datawork); 715d96be879SSascha Hauer 716d96be879SSascha Hauer } 717d96be879SSascha Hauer 718d96be879SSascha Hauer static irqreturn_t mxcmci_irq(int irq, void *devid) 719d96be879SSascha Hauer { 720d96be879SSascha Hauer struct mxcmci_host *host = devid; 721f441b993SDaniel Mack bool sdio_irq; 722d96be879SSascha Hauer u32 stat; 723d96be879SSascha Hauer 724c7ceab02SAnatolij Gustschin stat = mxcmci_readl(host, MMC_REG_STATUS); 725c7ceab02SAnatolij Gustschin mxcmci_writel(host, 726c7ceab02SAnatolij Gustschin stat & ~(STATUS_SDIO_INT_ACTIVE | STATUS_DATA_TRANS_DONE | 727c7ceab02SAnatolij Gustschin STATUS_WRITE_OP_DONE), 728c7ceab02SAnatolij Gustschin MMC_REG_STATUS); 729d96be879SSascha Hauer 730d96be879SSascha Hauer dev_dbg(mmc_dev(host->mmc), "%s: 0x%08x\n", __func__, stat); 731d96be879SSascha Hauer 7325a941898Sjun qian spin_lock(&host->lock); 733f441b993SDaniel Mack sdio_irq = (stat & STATUS_SDIO_INT_ACTIVE) && host->use_sdio; 7345a941898Sjun qian spin_unlock(&host->lock); 735f441b993SDaniel Mack 736adfa5703SMatteo Facchinetti if (mxcmci_use_dma(host) && (stat & (STATUS_WRITE_OP_DONE))) 737adfa5703SMatteo Facchinetti mxcmci_writel(host, STATUS_WRITE_OP_DONE, MMC_REG_STATUS); 7384a31f2efSDaniel Mack 739f441b993SDaniel Mack if (sdio_irq) { 740c7ceab02SAnatolij Gustschin mxcmci_writel(host, STATUS_SDIO_INT_ACTIVE, MMC_REG_STATUS); 741f441b993SDaniel Mack mmc_signal_sdio_irq(host->mmc); 742f441b993SDaniel Mack } 743f441b993SDaniel Mack 744d96be879SSascha Hauer if (stat & STATUS_END_CMD_RESP) 745d96be879SSascha Hauer mxcmci_cmd_done(host, stat); 746f441b993SDaniel Mack 747adfa5703SMatteo Facchinetti if (mxcmci_use_dma(host) && (stat & STATUS_WRITE_OP_DONE)) { 748f6ad0a48SJavier Martin del_timer(&host->watchdog); 749d96be879SSascha Hauer mxcmci_data_done(host, stat); 750f6ad0a48SJavier Martin } 751f53fbde4SSascha Hauer 75216b3bf8cSEric Bénard if (host->default_irq_mask && 75316b3bf8cSEric Bénard (stat & (STATUS_CARD_INSERTION | STATUS_CARD_REMOVAL))) 75416b3bf8cSEric Bénard mmc_detect_change(host->mmc, msecs_to_jiffies(200)); 755f53fbde4SSascha Hauer 756d96be879SSascha Hauer return IRQ_HANDLED; 757d96be879SSascha Hauer } 758d96be879SSascha Hauer 759d96be879SSascha Hauer static void mxcmci_request(struct mmc_host *mmc, struct mmc_request *req) 760d96be879SSascha Hauer { 761d96be879SSascha Hauer struct mxcmci_host *host = mmc_priv(mmc); 762d96be879SSascha Hauer unsigned int cmdat = host->cmdat; 763656217d2SMartin Fuzzey int error; 764d96be879SSascha Hauer 765d96be879SSascha Hauer WARN_ON(host->req != NULL); 766d96be879SSascha Hauer 767d96be879SSascha Hauer host->req = req; 768d96be879SSascha Hauer host->cmdat &= ~CMD_DAT_CONT_INIT; 769f53fbde4SSascha Hauer 770f53fbde4SSascha Hauer if (host->dma) 771d96be879SSascha Hauer host->do_dma = 1; 772f53fbde4SSascha Hauer 773d96be879SSascha Hauer if (req->data) { 774656217d2SMartin Fuzzey error = mxcmci_setup_data(host, req->data); 775656217d2SMartin Fuzzey if (error) { 776656217d2SMartin Fuzzey req->cmd->error = error; 777656217d2SMartin Fuzzey goto out; 778656217d2SMartin Fuzzey } 779656217d2SMartin Fuzzey 780d96be879SSascha Hauer 781d96be879SSascha Hauer cmdat |= CMD_DAT_CONT_DATA_ENABLE; 782d96be879SSascha Hauer 783d96be879SSascha Hauer if (req->data->flags & MMC_DATA_WRITE) 784d96be879SSascha Hauer cmdat |= CMD_DAT_CONT_WRITE; 785d96be879SSascha Hauer } 786d96be879SSascha Hauer 787656217d2SMartin Fuzzey error = mxcmci_start_cmd(host, req->cmd, cmdat); 788f53fbde4SSascha Hauer 789656217d2SMartin Fuzzey out: 790656217d2SMartin Fuzzey if (error) 791d96be879SSascha Hauer mxcmci_finish_request(host, req); 792d96be879SSascha Hauer } 793d96be879SSascha Hauer 794d96be879SSascha Hauer static void mxcmci_set_clk_rate(struct mxcmci_host *host, unsigned int clk_ios) 795d96be879SSascha Hauer { 796d96be879SSascha Hauer unsigned int divider; 797d96be879SSascha Hauer int prescaler = 0; 798529aa29eSSascha Hauer unsigned int clk_in = clk_get_rate(host->clk_per); 799d96be879SSascha Hauer 800d96be879SSascha Hauer while (prescaler <= 0x800) { 801d96be879SSascha Hauer for (divider = 1; divider <= 0xF; divider++) { 802d96be879SSascha Hauer int x; 803d96be879SSascha Hauer 804d96be879SSascha Hauer x = (clk_in / (divider + 1)); 805d96be879SSascha Hauer 806d96be879SSascha Hauer if (prescaler) 807d96be879SSascha Hauer x /= (prescaler * 2); 808d96be879SSascha Hauer 809d96be879SSascha Hauer if (x <= clk_ios) 810d96be879SSascha Hauer break; 811d96be879SSascha Hauer } 812d96be879SSascha Hauer if (divider < 0x10) 813d96be879SSascha Hauer break; 814d96be879SSascha Hauer 815d96be879SSascha Hauer if (prescaler == 0) 816d96be879SSascha Hauer prescaler = 1; 817d96be879SSascha Hauer else 818d96be879SSascha Hauer prescaler <<= 1; 819d96be879SSascha Hauer } 820d96be879SSascha Hauer 821c7ceab02SAnatolij Gustschin mxcmci_writew(host, (prescaler << 4) | divider, MMC_REG_CLK_RATE); 822d96be879SSascha Hauer 823d96be879SSascha Hauer dev_dbg(mmc_dev(host->mmc), "scaler: %d divider: %d in: %d out: %d\n", 824d96be879SSascha Hauer prescaler, divider, clk_in, clk_ios); 825d96be879SSascha Hauer } 826d96be879SSascha Hauer 827f53fbde4SSascha Hauer static int mxcmci_setup_dma(struct mmc_host *mmc) 828f53fbde4SSascha Hauer { 829f53fbde4SSascha Hauer struct mxcmci_host *host = mmc_priv(mmc); 830f53fbde4SSascha Hauer struct dma_slave_config *config = &host->dma_slave_config; 831f53fbde4SSascha Hauer 83201e4f958SAlexander Shiyan config->dst_addr = host->phys_base + MMC_REG_BUFFER_ACCESS; 83301e4f958SAlexander Shiyan config->src_addr = host->phys_base + MMC_REG_BUFFER_ACCESS; 834f53fbde4SSascha Hauer config->dst_addr_width = 4; 835f53fbde4SSascha Hauer config->src_addr_width = 4; 836f53fbde4SSascha Hauer config->dst_maxburst = host->burstlen; 837f53fbde4SSascha Hauer config->src_maxburst = host->burstlen; 838258aea76SViresh Kumar config->device_fc = false; 839f53fbde4SSascha Hauer 840f53fbde4SSascha Hauer return dmaengine_slave_config(host->dma, config); 841f53fbde4SSascha Hauer } 842f53fbde4SSascha Hauer 843d96be879SSascha Hauer static void mxcmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) 844d96be879SSascha Hauer { 845d96be879SSascha Hauer struct mxcmci_host *host = mmc_priv(mmc); 846f53fbde4SSascha Hauer int burstlen, ret; 847f53fbde4SSascha Hauer 848d96be879SSascha Hauer /* 8496584cb88SSascha Hauer * use burstlen of 64 (16 words) in 4 bit mode (--> reg value 0) 8506584cb88SSascha Hauer * use burstlen of 16 (4 words) in 1 bit mode (--> reg value 16) 851d96be879SSascha Hauer */ 852d96be879SSascha Hauer if (ios->bus_width == MMC_BUS_WIDTH_4) 853f53fbde4SSascha Hauer burstlen = 16; 8546584cb88SSascha Hauer else 8556584cb88SSascha Hauer burstlen = 4; 856d96be879SSascha Hauer 857f53fbde4SSascha Hauer if (mxcmci_use_dma(host) && burstlen != host->burstlen) { 858f53fbde4SSascha Hauer host->burstlen = burstlen; 859f53fbde4SSascha Hauer ret = mxcmci_setup_dma(mmc); 860f53fbde4SSascha Hauer if (ret) { 861f53fbde4SSascha Hauer dev_err(mmc_dev(host->mmc), 862f53fbde4SSascha Hauer "failed to config DMA channel. Falling back to PIO\n"); 863f53fbde4SSascha Hauer dma_release_channel(host->dma); 864f53fbde4SSascha Hauer host->do_dma = 0; 865e58f516fSSascha Hauer host->dma = NULL; 866f53fbde4SSascha Hauer } 867f53fbde4SSascha Hauer } 868f53fbde4SSascha Hauer 869d96be879SSascha Hauer if (ios->bus_width == MMC_BUS_WIDTH_4) 870d96be879SSascha Hauer host->cmdat |= CMD_DAT_CONT_BUS_WIDTH_4; 871d96be879SSascha Hauer else 872d96be879SSascha Hauer host->cmdat &= ~CMD_DAT_CONT_BUS_WIDTH_4; 873d96be879SSascha Hauer 874d96be879SSascha Hauer if (host->power_mode != ios->power_mode) { 875d96be879SSascha Hauer host->power_mode = ios->power_mode; 876bc3c1771SAlexander Shiyan mxcmci_set_power(host, ios->vdd); 87774b66954SAlberto Panizzo 878d96be879SSascha Hauer if (ios->power_mode == MMC_POWER_ON) 879d96be879SSascha Hauer host->cmdat |= CMD_DAT_CONT_INIT; 880d96be879SSascha Hauer } 881d96be879SSascha Hauer 882d96be879SSascha Hauer if (ios->clock) { 883d96be879SSascha Hauer mxcmci_set_clk_rate(host, ios->clock); 884c7ceab02SAnatolij Gustschin mxcmci_writew(host, STR_STP_CLK_START_CLK, MMC_REG_STR_STP_CLK); 885d96be879SSascha Hauer } else { 886c7ceab02SAnatolij Gustschin mxcmci_writew(host, STR_STP_CLK_STOP_CLK, MMC_REG_STR_STP_CLK); 887d96be879SSascha Hauer } 888d96be879SSascha Hauer 889d96be879SSascha Hauer host->clock = ios->clock; 890d96be879SSascha Hauer } 891d96be879SSascha Hauer 892d96be879SSascha Hauer static irqreturn_t mxcmci_detect_irq(int irq, void *data) 893d96be879SSascha Hauer { 894d96be879SSascha Hauer struct mmc_host *mmc = data; 895d96be879SSascha Hauer 896d96be879SSascha Hauer dev_dbg(mmc_dev(mmc), "%s\n", __func__); 897d96be879SSascha Hauer 898d96be879SSascha Hauer mmc_detect_change(mmc, msecs_to_jiffies(250)); 899d96be879SSascha Hauer return IRQ_HANDLED; 900d96be879SSascha Hauer } 901d96be879SSascha Hauer 902d96be879SSascha Hauer static int mxcmci_get_ro(struct mmc_host *mmc) 903d96be879SSascha Hauer { 904d96be879SSascha Hauer struct mxcmci_host *host = mmc_priv(mmc); 905d96be879SSascha Hauer 906d96be879SSascha Hauer if (host->pdata && host->pdata->get_ro) 907d96be879SSascha Hauer return !!host->pdata->get_ro(mmc_dev(mmc)); 908d96be879SSascha Hauer /* 909bcf53524SAnatolij Gustschin * If board doesn't support read only detection (no mmc_gpio 910bcf53524SAnatolij Gustschin * context or gpio is invalid), then let the mmc core decide 911bcf53524SAnatolij Gustschin * what to do. 912d96be879SSascha Hauer */ 913bcf53524SAnatolij Gustschin return mmc_gpio_get_ro(mmc); 914d96be879SSascha Hauer } 915d96be879SSascha Hauer 916f441b993SDaniel Mack static void mxcmci_enable_sdio_irq(struct mmc_host *mmc, int enable) 917f441b993SDaniel Mack { 918f441b993SDaniel Mack struct mxcmci_host *host = mmc_priv(mmc); 919f441b993SDaniel Mack unsigned long flags; 920f441b993SDaniel Mack u32 int_cntr; 921f441b993SDaniel Mack 922f441b993SDaniel Mack spin_lock_irqsave(&host->lock, flags); 923f441b993SDaniel Mack host->use_sdio = enable; 924c7ceab02SAnatolij Gustschin int_cntr = mxcmci_readl(host, MMC_REG_INT_CNTR); 925f441b993SDaniel Mack 926f441b993SDaniel Mack if (enable) 927f441b993SDaniel Mack int_cntr |= INT_SDIO_IRQ_EN; 928f441b993SDaniel Mack else 929f441b993SDaniel Mack int_cntr &= ~INT_SDIO_IRQ_EN; 930f441b993SDaniel Mack 931c7ceab02SAnatolij Gustschin mxcmci_writel(host, int_cntr, MMC_REG_INT_CNTR); 932f441b993SDaniel Mack spin_unlock_irqrestore(&host->lock, flags); 933f441b993SDaniel Mack } 934d96be879SSascha Hauer 9353fcb027dSDaniel Mack static void mxcmci_init_card(struct mmc_host *host, struct mmc_card *card) 9363fcb027dSDaniel Mack { 9377f917a8dSShawn Guo struct mxcmci_host *mxcmci = mmc_priv(host); 9387f917a8dSShawn Guo 9393fcb027dSDaniel Mack /* 9403fcb027dSDaniel Mack * MX3 SoCs have a silicon bug which corrupts CRC calculation of 9413fcb027dSDaniel Mack * multi-block transfers when connected SDIO peripheral doesn't 9423fcb027dSDaniel Mack * drive the BUSY line as required by the specs. 9433fcb027dSDaniel Mack * One way to prevent this is to only allow 1-bit transfers. 9443fcb027dSDaniel Mack */ 9453fcb027dSDaniel Mack 9467f917a8dSShawn Guo if (is_imx31_mmc(mxcmci) && card->type == MMC_TYPE_SDIO) 9473fcb027dSDaniel Mack host->caps &= ~MMC_CAP_4_BIT_DATA; 9483fcb027dSDaniel Mack else 9493fcb027dSDaniel Mack host->caps |= MMC_CAP_4_BIT_DATA; 9503fcb027dSDaniel Mack } 9513fcb027dSDaniel Mack 952f53fbde4SSascha Hauer static bool filter(struct dma_chan *chan, void *param) 953f53fbde4SSascha Hauer { 954f53fbde4SSascha Hauer struct mxcmci_host *host = param; 955f53fbde4SSascha Hauer 956f53fbde4SSascha Hauer if (!imx_dma_is_general_purpose(chan)) 957f53fbde4SSascha Hauer return false; 958f53fbde4SSascha Hauer 959f53fbde4SSascha Hauer chan->private = &host->dma_data; 960f53fbde4SSascha Hauer 961f53fbde4SSascha Hauer return true; 962f53fbde4SSascha Hauer } 963f53fbde4SSascha Hauer 9642ee4f620SKees Cook static void mxcmci_watchdog(struct timer_list *t) 965f6ad0a48SJavier Martin { 9662ee4f620SKees Cook struct mxcmci_host *host = from_timer(host, t, watchdog); 967f6ad0a48SJavier Martin struct mmc_request *req = host->req; 968c7ceab02SAnatolij Gustschin unsigned int stat = mxcmci_readl(host, MMC_REG_STATUS); 969f6ad0a48SJavier Martin 970f6ad0a48SJavier Martin if (host->dma_dir == DMA_FROM_DEVICE) { 971f6ad0a48SJavier Martin dmaengine_terminate_all(host->dma); 972f6ad0a48SJavier Martin dev_err(mmc_dev(host->mmc), 973f6ad0a48SJavier Martin "%s: read time out (status = 0x%08x)\n", 974f6ad0a48SJavier Martin __func__, stat); 975f6ad0a48SJavier Martin } else { 976f6ad0a48SJavier Martin dev_err(mmc_dev(host->mmc), 977f6ad0a48SJavier Martin "%s: write time out (status = 0x%08x)\n", 978f6ad0a48SJavier Martin __func__, stat); 979f6ad0a48SJavier Martin mxcmci_softreset(host); 980f6ad0a48SJavier Martin } 981f6ad0a48SJavier Martin 982f6ad0a48SJavier Martin /* Mark transfer as erroneus and inform the upper layers */ 983f6ad0a48SJavier Martin 98470aa6109SAnatolij Gustschin if (host->data) 985f6ad0a48SJavier Martin host->data->error = -ETIMEDOUT; 986f6ad0a48SJavier Martin host->req = NULL; 987f6ad0a48SJavier Martin host->cmd = NULL; 988f6ad0a48SJavier Martin host->data = NULL; 989f6ad0a48SJavier Martin mmc_request_done(host->mmc, req); 990f6ad0a48SJavier Martin } 991f6ad0a48SJavier Martin 992d96be879SSascha Hauer static const struct mmc_host_ops mxcmci_ops = { 993d96be879SSascha Hauer .request = mxcmci_request, 994d96be879SSascha Hauer .set_ios = mxcmci_set_ios, 995d96be879SSascha Hauer .get_ro = mxcmci_get_ro, 996f441b993SDaniel Mack .enable_sdio_irq = mxcmci_enable_sdio_irq, 9973fcb027dSDaniel Mack .init_card = mxcmci_init_card, 998d96be879SSascha Hauer }; 999d96be879SSascha Hauer 1000d96be879SSascha Hauer static int mxcmci_probe(struct platform_device *pdev) 1001d96be879SSascha Hauer { 1002d96be879SSascha Hauer struct mmc_host *mmc; 100301e4f958SAlexander Shiyan struct mxcmci_host *host; 100401e4f958SAlexander Shiyan struct resource *res; 1005d96be879SSascha Hauer int ret = 0, irq; 10067ff747c4SMarkus Pargmann bool dat3_card_detect = false; 1007f53fbde4SSascha Hauer dma_cap_mask_t mask; 10087ff747c4SMarkus Pargmann const struct of_device_id *of_id; 10097ff747c4SMarkus Pargmann struct imxmmc_platform_data *pdata = pdev->dev.platform_data; 1010d96be879SSascha Hauer 1011c7ceab02SAnatolij Gustschin pr_info("i.MX/MPC512x SDHC driver\n"); 1012d96be879SSascha Hauer 10137ff747c4SMarkus Pargmann of_id = of_match_device(mxcmci_of_match, &pdev->dev); 10147ff747c4SMarkus Pargmann 101501e4f958SAlexander Shiyan res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 1016d96be879SSascha Hauer irq = platform_get_irq(pdev, 0); 1017f216c124SGustavo A. R. Silva if (irq < 0) { 1018f216c124SGustavo A. R. Silva dev_err(&pdev->dev, "failed to get IRQ: %d\n", irq); 1019f216c124SGustavo A. R. Silva return irq; 1020f216c124SGustavo A. R. Silva } 1021d96be879SSascha Hauer 102201e4f958SAlexander Shiyan mmc = mmc_alloc_host(sizeof(*host), &pdev->dev); 102301e4f958SAlexander Shiyan if (!mmc) 102401e4f958SAlexander Shiyan return -ENOMEM; 1025d96be879SSascha Hauer 102601e4f958SAlexander Shiyan host = mmc_priv(mmc); 102701e4f958SAlexander Shiyan 102801e4f958SAlexander Shiyan host->base = devm_ioremap_resource(&pdev->dev, res); 102901e4f958SAlexander Shiyan if (IS_ERR(host->base)) { 103001e4f958SAlexander Shiyan ret = PTR_ERR(host->base); 103101e4f958SAlexander Shiyan goto out_free; 1032d96be879SSascha Hauer } 1033d96be879SSascha Hauer 103401e4f958SAlexander Shiyan host->phys_base = res->start; 103501e4f958SAlexander Shiyan 1036b8857696SSimon Baatz ret = mmc_of_parse(mmc); 1037b8857696SSimon Baatz if (ret) 1038b8857696SSimon Baatz goto out_free; 1039d96be879SSascha Hauer mmc->ops = &mxcmci_ops; 10407ff747c4SMarkus Pargmann 10417ff747c4SMarkus Pargmann /* For devicetree parsing, the bus width is read from devicetree */ 10427ff747c4SMarkus Pargmann if (pdata) 1043f441b993SDaniel Mack mmc->caps = MMC_CAP_4_BIT_DATA | MMC_CAP_SDIO_IRQ; 10447ff747c4SMarkus Pargmann else 10457ff747c4SMarkus Pargmann mmc->caps |= MMC_CAP_SDIO_IRQ; 1046d96be879SSascha Hauer 1047d96be879SSascha Hauer /* MMC core transfer sizes tunable parameters */ 1048d96be879SSascha Hauer mmc->max_blk_size = 2048; 1049d96be879SSascha Hauer mmc->max_blk_count = 65535; 1050d96be879SSascha Hauer mmc->max_req_size = mmc->max_blk_size * mmc->max_blk_count; 1051d759c374SVladimir Zapolskiy mmc->max_seg_size = mmc->max_req_size; 1052d96be879SSascha Hauer 10537ff747c4SMarkus Pargmann if (of_id) { 10547ff747c4SMarkus Pargmann const struct platform_device_id *id_entry = of_id->data; 10557ff747c4SMarkus Pargmann host->devtype = id_entry->driver_data; 10567ff747c4SMarkus Pargmann } else { 10577f917a8dSShawn Guo host->devtype = pdev->id_entry->driver_data; 10587ff747c4SMarkus Pargmann } 1059e48fc15aSAnatolij Gustschin 1060e48fc15aSAnatolij Gustschin /* adjust max_segs after devtype detection */ 1061e48fc15aSAnatolij Gustschin if (!is_mpc512x_mmc(host)) 1062e48fc15aSAnatolij Gustschin mmc->max_segs = 64; 1063e48fc15aSAnatolij Gustschin 10647ff747c4SMarkus Pargmann host->mmc = mmc; 10657ff747c4SMarkus Pargmann host->pdata = pdata; 1066f441b993SDaniel Mack spin_lock_init(&host->lock); 1067d96be879SSascha Hauer 10687ff747c4SMarkus Pargmann if (pdata) 10697ff747c4SMarkus Pargmann dat3_card_detect = pdata->dat3_card_detect; 1070860951c5SJaehoon Chung else if (mmc_card_is_removable(mmc) 10717ff747c4SMarkus Pargmann && !of_property_read_bool(pdev->dev.of_node, "cd-gpios")) 10727ff747c4SMarkus Pargmann dat3_card_detect = true; 10737ff747c4SMarkus Pargmann 1074bc3c1771SAlexander Shiyan ret = mmc_regulator_get_supply(mmc); 1075337d7c8aSWolfram Sang if (ret) 1076bc3c1771SAlexander Shiyan goto out_free; 107718a09806SMatteo Facchinetti 107818a09806SMatteo Facchinetti if (!mmc->ocr_avail) { 107918a09806SMatteo Facchinetti if (pdata && pdata->ocr_avail) 108018a09806SMatteo Facchinetti mmc->ocr_avail = pdata->ocr_avail; 108118a09806SMatteo Facchinetti else 108218a09806SMatteo Facchinetti mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34; 1083bc3c1771SAlexander Shiyan } 1084d96be879SSascha Hauer 10857ff747c4SMarkus Pargmann if (dat3_card_detect) 108616b3bf8cSEric Bénard host->default_irq_mask = 108716b3bf8cSEric Bénard INT_CARD_INSERTION_EN | INT_CARD_REMOVAL_EN; 108816b3bf8cSEric Bénard else 108916b3bf8cSEric Bénard host->default_irq_mask = 0; 109016b3bf8cSEric Bénard 1091529aa29eSSascha Hauer host->clk_ipg = devm_clk_get(&pdev->dev, "ipg"); 1092529aa29eSSascha Hauer if (IS_ERR(host->clk_ipg)) { 1093529aa29eSSascha Hauer ret = PTR_ERR(host->clk_ipg); 109401e4f958SAlexander Shiyan goto out_free; 1095d96be879SSascha Hauer } 1096529aa29eSSascha Hauer 1097529aa29eSSascha Hauer host->clk_per = devm_clk_get(&pdev->dev, "per"); 1098529aa29eSSascha Hauer if (IS_ERR(host->clk_per)) { 1099529aa29eSSascha Hauer ret = PTR_ERR(host->clk_per); 110001e4f958SAlexander Shiyan goto out_free; 1101529aa29eSSascha Hauer } 1102529aa29eSSascha Hauer 1103a2bc74cfSArvind Yadav ret = clk_prepare_enable(host->clk_per); 1104a2bc74cfSArvind Yadav if (ret) 1105a2bc74cfSArvind Yadav goto out_free; 1106a2bc74cfSArvind Yadav 1107a2bc74cfSArvind Yadav ret = clk_prepare_enable(host->clk_ipg); 1108a2bc74cfSArvind Yadav if (ret) 1109a2bc74cfSArvind Yadav goto out_clk_per_put; 1110d96be879SSascha Hauer 1111d96be879SSascha Hauer mxcmci_softreset(host); 1112d96be879SSascha Hauer 1113c7ceab02SAnatolij Gustschin host->rev_no = mxcmci_readw(host, MMC_REG_REV_NO); 1114d96be879SSascha Hauer if (host->rev_no != 0x400) { 1115d96be879SSascha Hauer ret = -ENODEV; 1116d96be879SSascha Hauer dev_err(mmc_dev(host->mmc), "wrong rev.no. 0x%08x. aborting.\n", 1117d96be879SSascha Hauer host->rev_no); 1118d96be879SSascha Hauer goto out_clk_put; 1119d96be879SSascha Hauer } 1120d96be879SSascha Hauer 1121529aa29eSSascha Hauer mmc->f_min = clk_get_rate(host->clk_per) >> 16; 1122529aa29eSSascha Hauer mmc->f_max = clk_get_rate(host->clk_per) >> 1; 1123d96be879SSascha Hauer 1124d96be879SSascha Hauer /* recommended in data sheet */ 1125c7ceab02SAnatolij Gustschin mxcmci_writew(host, 0x2db4, MMC_REG_READ_TO); 1126d96be879SSascha Hauer 1127c7ceab02SAnatolij Gustschin mxcmci_writel(host, host->default_irq_mask, MMC_REG_INT_CNTR); 1128d96be879SSascha Hauer 11297ff747c4SMarkus Pargmann if (!host->pdata) { 11307ff747c4SMarkus Pargmann host->dma = dma_request_slave_channel(&pdev->dev, "rx-tx"); 11317ff747c4SMarkus Pargmann } else { 113201e4f958SAlexander Shiyan res = platform_get_resource(pdev, IORESOURCE_DMA, 0); 113301e4f958SAlexander Shiyan if (res) { 113401e4f958SAlexander Shiyan host->dmareq = res->start; 1135f53fbde4SSascha Hauer host->dma_data.peripheral_type = IMX_DMATYPE_SDHC; 1136f53fbde4SSascha Hauer host->dma_data.priority = DMA_PRIO_LOW; 1137f53fbde4SSascha Hauer host->dma_data.dma_request = host->dmareq; 1138f53fbde4SSascha Hauer dma_cap_zero(mask); 1139f53fbde4SSascha Hauer dma_cap_set(DMA_SLAVE, mask); 1140f53fbde4SSascha Hauer host->dma = dma_request_channel(mask, filter, host); 11417ff747c4SMarkus Pargmann } 11427ff747c4SMarkus Pargmann } 1143f53fbde4SSascha Hauer if (host->dma) 1144f53fbde4SSascha Hauer mmc->max_seg_size = dma_get_max_seg_size( 1145f53fbde4SSascha Hauer host->dma->device->dev); 11467ff747c4SMarkus Pargmann else 1147f53fbde4SSascha Hauer dev_info(mmc_dev(host->mmc), "dma not available. Using PIO\n"); 1148f53fbde4SSascha Hauer 1149d96be879SSascha Hauer INIT_WORK(&host->datawork, mxcmci_datawork); 1150d96be879SSascha Hauer 115101e4f958SAlexander Shiyan ret = devm_request_irq(&pdev->dev, irq, mxcmci_irq, 0, 115201e4f958SAlexander Shiyan dev_name(&pdev->dev), host); 1153d96be879SSascha Hauer if (ret) 1154d96be879SSascha Hauer goto out_free_dma; 1155d96be879SSascha Hauer 1156d96be879SSascha Hauer platform_set_drvdata(pdev, mmc); 1157d96be879SSascha Hauer 1158d96be879SSascha Hauer if (host->pdata && host->pdata->init) { 1159d96be879SSascha Hauer ret = host->pdata->init(&pdev->dev, mxcmci_detect_irq, 1160d96be879SSascha Hauer host->mmc); 1161d96be879SSascha Hauer if (ret) 116201e4f958SAlexander Shiyan goto out_free_dma; 1163d96be879SSascha Hauer } 1164d96be879SSascha Hauer 11652ee4f620SKees Cook timer_setup(&host->watchdog, mxcmci_watchdog, 0); 1166f6ad0a48SJavier Martin 1167abd4190fSAlexander Shiyan mmc_add_host(mmc); 1168abd4190fSAlexander Shiyan 1169d96be879SSascha Hauer return 0; 1170d96be879SSascha Hauer 1171d96be879SSascha Hauer out_free_dma: 1172f53fbde4SSascha Hauer if (host->dma) 1173f53fbde4SSascha Hauer dma_release_channel(host->dma); 117401e4f958SAlexander Shiyan 1175d96be879SSascha Hauer out_clk_put: 1176529aa29eSSascha Hauer clk_disable_unprepare(host->clk_ipg); 1177a2bc74cfSArvind Yadav out_clk_per_put: 1178a2bc74cfSArvind Yadav clk_disable_unprepare(host->clk_per); 117901e4f958SAlexander Shiyan 1180d96be879SSascha Hauer out_free: 1181d96be879SSascha Hauer mmc_free_host(mmc); 118201e4f958SAlexander Shiyan 1183d96be879SSascha Hauer return ret; 1184d96be879SSascha Hauer } 1185d96be879SSascha Hauer 1186d96be879SSascha Hauer static int mxcmci_remove(struct platform_device *pdev) 1187d96be879SSascha Hauer { 1188d96be879SSascha Hauer struct mmc_host *mmc = platform_get_drvdata(pdev); 1189d96be879SSascha Hauer struct mxcmci_host *host = mmc_priv(mmc); 1190d96be879SSascha Hauer 1191d96be879SSascha Hauer mmc_remove_host(mmc); 1192d96be879SSascha Hauer 1193d96be879SSascha Hauer if (host->pdata && host->pdata->exit) 1194d96be879SSascha Hauer host->pdata->exit(&pdev->dev, mmc); 1195d96be879SSascha Hauer 1196f53fbde4SSascha Hauer if (host->dma) 1197f53fbde4SSascha Hauer dma_release_channel(host->dma); 1198f53fbde4SSascha Hauer 1199529aa29eSSascha Hauer clk_disable_unprepare(host->clk_per); 1200529aa29eSSascha Hauer clk_disable_unprepare(host->clk_ipg); 1201d96be879SSascha Hauer 1202d96be879SSascha Hauer mmc_free_host(mmc); 1203d96be879SSascha Hauer 1204d96be879SSascha Hauer return 0; 1205d96be879SSascha Hauer } 1206d96be879SSascha Hauer 1207d8edfc4eSUlf Hansson #ifdef CONFIG_PM_SLEEP 1208d8edfc4eSUlf Hansson static int mxcmci_suspend(struct device *dev) 1209d96be879SSascha Hauer { 1210a7d403cfSEric Bénard struct mmc_host *mmc = dev_get_drvdata(dev); 1211a7d403cfSEric Bénard struct mxcmci_host *host = mmc_priv(mmc); 1212d96be879SSascha Hauer 1213529aa29eSSascha Hauer clk_disable_unprepare(host->clk_per); 1214529aa29eSSascha Hauer clk_disable_unprepare(host->clk_ipg); 1215bd190f90SUlf Hansson return 0; 1216d96be879SSascha Hauer } 1217d96be879SSascha Hauer 1218d8edfc4eSUlf Hansson static int mxcmci_resume(struct device *dev) 1219d96be879SSascha Hauer { 1220a7d403cfSEric Bénard struct mmc_host *mmc = dev_get_drvdata(dev); 1221a7d403cfSEric Bénard struct mxcmci_host *host = mmc_priv(mmc); 1222a2bc74cfSArvind Yadav int ret; 1223d96be879SSascha Hauer 1224a2bc74cfSArvind Yadav ret = clk_prepare_enable(host->clk_per); 1225a2bc74cfSArvind Yadav if (ret) 1226a2bc74cfSArvind Yadav return ret; 1227a2bc74cfSArvind Yadav 1228a2bc74cfSArvind Yadav ret = clk_prepare_enable(host->clk_ipg); 1229a2bc74cfSArvind Yadav if (ret) 1230a2bc74cfSArvind Yadav clk_disable_unprepare(host->clk_per); 1231a2bc74cfSArvind Yadav 1232a2bc74cfSArvind Yadav return ret; 1233d96be879SSascha Hauer } 1234d8edfc4eSUlf Hansson #endif 1235a7d403cfSEric Bénard 1236384a81d5SAlexander Shiyan static SIMPLE_DEV_PM_OPS(mxcmci_pm_ops, mxcmci_suspend, mxcmci_resume); 1237d96be879SSascha Hauer 1238d96be879SSascha Hauer static struct platform_driver mxcmci_driver = { 1239d96be879SSascha Hauer .probe = mxcmci_probe, 1240d96be879SSascha Hauer .remove = mxcmci_remove, 12417f917a8dSShawn Guo .id_table = mxcmci_devtype, 1242d96be879SSascha Hauer .driver = { 1243d96be879SSascha Hauer .name = DRIVER_NAME, 1244a7d403cfSEric Bénard .pm = &mxcmci_pm_ops, 12457ff747c4SMarkus Pargmann .of_match_table = mxcmci_of_match, 1246d96be879SSascha Hauer } 1247d96be879SSascha Hauer }; 1248d96be879SSascha Hauer 1249d1f81a64SAxel Lin module_platform_driver(mxcmci_driver); 1250d96be879SSascha Hauer 1251d96be879SSascha Hauer MODULE_DESCRIPTION("i.MX Multimedia Card Interface Driver"); 1252d96be879SSascha Hauer MODULE_AUTHOR("Sascha Hauer, Pengutronix"); 1253d96be879SSascha Hauer MODULE_LICENSE("GPL"); 12546eb30adfSFabio Estevam MODULE_ALIAS("platform:mxc-mmc"); 1255