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 15674b66954SAlberto Panizzo struct regulator *vcc; 157f53fbde4SSascha Hauer 158f53fbde4SSascha Hauer int burstlen; 159f53fbde4SSascha Hauer int dmareq; 160f53fbde4SSascha Hauer struct dma_slave_config dma_slave_config; 161f53fbde4SSascha Hauer struct imx_dma_data dma_data; 162f6ad0a48SJavier Martin 163f6ad0a48SJavier Martin struct timer_list watchdog; 1647f917a8dSShawn Guo enum mxcmci_type devtype; 165d96be879SSascha Hauer }; 166d96be879SSascha Hauer 16742477053SAnatolij Gustschin static const struct platform_device_id mxcmci_devtype[] = { 1687f917a8dSShawn Guo { 1697f917a8dSShawn Guo .name = "imx21-mmc", 1707f917a8dSShawn Guo .driver_data = IMX21_MMC, 1717f917a8dSShawn Guo }, { 1727f917a8dSShawn Guo .name = "imx31-mmc", 1737f917a8dSShawn Guo .driver_data = IMX31_MMC, 1747f917a8dSShawn Guo }, { 175c7ceab02SAnatolij Gustschin .name = "mpc512x-sdhc", 176c7ceab02SAnatolij Gustschin .driver_data = MPC512X_MMC, 177c7ceab02SAnatolij Gustschin }, { 1787f917a8dSShawn Guo /* sentinel */ 1797f917a8dSShawn Guo } 1807f917a8dSShawn Guo }; 1817f917a8dSShawn Guo MODULE_DEVICE_TABLE(platform, mxcmci_devtype); 1827f917a8dSShawn Guo 1837ff747c4SMarkus Pargmann static const struct of_device_id mxcmci_of_match[] = { 1847ff747c4SMarkus Pargmann { 1857ff747c4SMarkus Pargmann .compatible = "fsl,imx21-mmc", 1867ff747c4SMarkus Pargmann .data = &mxcmci_devtype[IMX21_MMC], 1877ff747c4SMarkus Pargmann }, { 1887ff747c4SMarkus Pargmann .compatible = "fsl,imx31-mmc", 1897ff747c4SMarkus Pargmann .data = &mxcmci_devtype[IMX31_MMC], 1907ff747c4SMarkus Pargmann }, { 191c7ceab02SAnatolij Gustschin .compatible = "fsl,mpc5121-sdhc", 192c7ceab02SAnatolij Gustschin .data = &mxcmci_devtype[MPC512X_MMC], 193c7ceab02SAnatolij Gustschin }, { 1947ff747c4SMarkus Pargmann /* sentinel */ 1957ff747c4SMarkus Pargmann } 1967ff747c4SMarkus Pargmann }; 1977ff747c4SMarkus Pargmann MODULE_DEVICE_TABLE(of, mxcmci_of_match); 1987ff747c4SMarkus Pargmann 1997f917a8dSShawn Guo static inline int is_imx31_mmc(struct mxcmci_host *host) 2007f917a8dSShawn Guo { 2017f917a8dSShawn Guo return host->devtype == IMX31_MMC; 2027f917a8dSShawn Guo } 2037f917a8dSShawn Guo 204c7ceab02SAnatolij Gustschin static inline int is_mpc512x_mmc(struct mxcmci_host *host) 205c7ceab02SAnatolij Gustschin { 206c7ceab02SAnatolij Gustschin return host->devtype == MPC512X_MMC; 207c7ceab02SAnatolij Gustschin } 208c7ceab02SAnatolij Gustschin 209c7ceab02SAnatolij Gustschin static inline u32 mxcmci_readl(struct mxcmci_host *host, int reg) 210c7ceab02SAnatolij Gustschin { 211c7ceab02SAnatolij Gustschin if (IS_ENABLED(CONFIG_PPC_MPC512x)) 212c7ceab02SAnatolij Gustschin return ioread32be(host->base + reg); 213c7ceab02SAnatolij Gustschin else 214c7ceab02SAnatolij Gustschin return readl(host->base + reg); 215c7ceab02SAnatolij Gustschin } 216c7ceab02SAnatolij Gustschin 217c7ceab02SAnatolij Gustschin static inline void mxcmci_writel(struct mxcmci_host *host, u32 val, int reg) 218c7ceab02SAnatolij Gustschin { 219c7ceab02SAnatolij Gustschin if (IS_ENABLED(CONFIG_PPC_MPC512x)) 220c7ceab02SAnatolij Gustschin iowrite32be(val, host->base + reg); 221c7ceab02SAnatolij Gustschin else 222c7ceab02SAnatolij Gustschin writel(val, host->base + reg); 223c7ceab02SAnatolij Gustschin } 224c7ceab02SAnatolij Gustschin 225c7ceab02SAnatolij Gustschin static inline u16 mxcmci_readw(struct mxcmci_host *host, int reg) 226c7ceab02SAnatolij Gustschin { 227c7ceab02SAnatolij Gustschin if (IS_ENABLED(CONFIG_PPC_MPC512x)) 228c7ceab02SAnatolij Gustschin return ioread32be(host->base + reg); 229c7ceab02SAnatolij Gustschin else 230c7ceab02SAnatolij Gustschin return readw(host->base + reg); 231c7ceab02SAnatolij Gustschin } 232c7ceab02SAnatolij Gustschin 233c7ceab02SAnatolij Gustschin static inline void mxcmci_writew(struct mxcmci_host *host, u16 val, int reg) 234c7ceab02SAnatolij Gustschin { 235c7ceab02SAnatolij Gustschin if (IS_ENABLED(CONFIG_PPC_MPC512x)) 236c7ceab02SAnatolij Gustschin iowrite32be(val, host->base + reg); 237c7ceab02SAnatolij Gustschin else 238c7ceab02SAnatolij Gustschin writew(val, host->base + reg); 239c7ceab02SAnatolij Gustschin } 240c7ceab02SAnatolij Gustschin 24118489fa2SMartin Fuzzey static void mxcmci_set_clk_rate(struct mxcmci_host *host, unsigned int clk_ios); 24218489fa2SMartin Fuzzey 24301e4f958SAlexander Shiyan static void mxcmci_init_ocr(struct mxcmci_host *host) 24474b66954SAlberto Panizzo { 24501e4f958SAlexander Shiyan host->vcc = devm_regulator_get(mmc_dev(host->mmc), "vmmc"); 24674b66954SAlberto Panizzo if (IS_ERR(host->vcc)) { 24701e4f958SAlexander Shiyan if (host->pdata && host->pdata->ocr_avail) 24801e4f958SAlexander Shiyan host->mmc->ocr_avail = host->pdata->ocr_avail; 24901e4f958SAlexander Shiyan else 25001e4f958SAlexander Shiyan host->mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34; 25174b66954SAlberto Panizzo } else { 25274b66954SAlberto Panizzo host->mmc->ocr_avail = mmc_regulator_get_ocrmask(host->vcc); 25374b66954SAlberto Panizzo if (host->pdata && host->pdata->ocr_avail) 25474b66954SAlberto Panizzo dev_warn(mmc_dev(host->mmc), 25574b66954SAlberto Panizzo "pdata->ocr_avail will not be used\n"); 25674b66954SAlberto Panizzo } 25774b66954SAlberto Panizzo } 25874b66954SAlberto Panizzo 25901e4f958SAlexander Shiyan static void mxcmci_set_power(struct mxcmci_host *host, unsigned char power_mode, 260d078d242SAlberto Panizzo unsigned int vdd) 26174b66954SAlberto Panizzo { 26201e4f958SAlexander Shiyan if (!IS_ERR(host->vcc)) { 263d078d242SAlberto Panizzo if (power_mode == MMC_POWER_UP) 264d078d242SAlberto Panizzo mmc_regulator_set_ocr(host->mmc, host->vcc, vdd); 265d078d242SAlberto Panizzo else if (power_mode == MMC_POWER_OFF) 266d078d242SAlberto Panizzo mmc_regulator_set_ocr(host->mmc, host->vcc, 0); 267d078d242SAlberto Panizzo } 268d078d242SAlberto Panizzo 26974b66954SAlberto Panizzo if (host->pdata && host->pdata->setpower) 27074b66954SAlberto Panizzo host->pdata->setpower(mmc_dev(host->mmc), vdd); 27174b66954SAlberto Panizzo } 27274b66954SAlberto Panizzo 273d96be879SSascha Hauer static inline int mxcmci_use_dma(struct mxcmci_host *host) 274d96be879SSascha Hauer { 275d96be879SSascha Hauer return host->do_dma; 276d96be879SSascha Hauer } 277d96be879SSascha Hauer 278d96be879SSascha Hauer static void mxcmci_softreset(struct mxcmci_host *host) 279d96be879SSascha Hauer { 280d96be879SSascha Hauer int i; 281d96be879SSascha Hauer 2824725f6f1SDaniel Mack dev_dbg(mmc_dev(host->mmc), "mxcmci_softreset\n"); 2834725f6f1SDaniel Mack 284d96be879SSascha Hauer /* reset sequence */ 285c7ceab02SAnatolij Gustschin mxcmci_writew(host, STR_STP_CLK_RESET, MMC_REG_STR_STP_CLK); 286c7ceab02SAnatolij Gustschin mxcmci_writew(host, STR_STP_CLK_RESET | STR_STP_CLK_START_CLK, 287c7ceab02SAnatolij Gustschin MMC_REG_STR_STP_CLK); 288d96be879SSascha Hauer 289d96be879SSascha Hauer for (i = 0; i < 8; i++) 290c7ceab02SAnatolij Gustschin mxcmci_writew(host, STR_STP_CLK_START_CLK, MMC_REG_STR_STP_CLK); 291d96be879SSascha Hauer 292c7ceab02SAnatolij Gustschin mxcmci_writew(host, 0xff, MMC_REG_RES_TO); 293d96be879SSascha Hauer } 294d96be879SSascha Hauer 295e48fc15aSAnatolij Gustschin #if IS_ENABLED(CONFIG_PPC_MPC512x) 296e48fc15aSAnatolij Gustschin static inline void buffer_swap32(u32 *buf, int len) 297e48fc15aSAnatolij Gustschin { 298e48fc15aSAnatolij Gustschin int i; 299e48fc15aSAnatolij Gustschin 300e48fc15aSAnatolij Gustschin for (i = 0; i < ((len + 3) / 4); i++) { 301e48fc15aSAnatolij Gustschin st_le32(buf, *buf); 302e48fc15aSAnatolij Gustschin buf++; 303e48fc15aSAnatolij Gustschin } 304e48fc15aSAnatolij Gustschin } 305e48fc15aSAnatolij Gustschin 306e48fc15aSAnatolij Gustschin static void mxcmci_swap_buffers(struct mmc_data *data) 307e48fc15aSAnatolij Gustschin { 308e48fc15aSAnatolij Gustschin struct scatterlist *sg; 309e48fc15aSAnatolij Gustschin int i; 310e48fc15aSAnatolij Gustschin 311e48fc15aSAnatolij Gustschin for_each_sg(data->sg, sg, data->sg_len, i) 312e48fc15aSAnatolij Gustschin buffer_swap32(sg_virt(sg), sg->length); 313e48fc15aSAnatolij Gustschin } 314e48fc15aSAnatolij Gustschin #else 315e48fc15aSAnatolij Gustschin static inline void mxcmci_swap_buffers(struct mmc_data *data) {} 316e48fc15aSAnatolij Gustschin #endif 317e48fc15aSAnatolij Gustschin 318656217d2SMartin Fuzzey static int mxcmci_setup_data(struct mxcmci_host *host, struct mmc_data *data) 319d96be879SSascha Hauer { 320d96be879SSascha Hauer unsigned int nob = data->blocks; 321d96be879SSascha Hauer unsigned int blksz = data->blksz; 322d96be879SSascha Hauer unsigned int datasize = nob * blksz; 323d96be879SSascha Hauer struct scatterlist *sg; 32405f5799cSVinod Koul enum dma_transfer_direction slave_dirn; 325f53fbde4SSascha Hauer int i, nents; 326f53fbde4SSascha Hauer 327d96be879SSascha Hauer if (data->flags & MMC_DATA_STREAM) 328d96be879SSascha Hauer nob = 0xffff; 329d96be879SSascha Hauer 330d96be879SSascha Hauer host->data = data; 331d96be879SSascha Hauer data->bytes_xfered = 0; 332d96be879SSascha Hauer 333c7ceab02SAnatolij Gustschin mxcmci_writew(host, nob, MMC_REG_NOB); 334c7ceab02SAnatolij Gustschin mxcmci_writew(host, blksz, MMC_REG_BLK_LEN); 335d96be879SSascha Hauer host->datasize = datasize; 336d96be879SSascha Hauer 337f53fbde4SSascha Hauer if (!mxcmci_use_dma(host)) 338f53fbde4SSascha Hauer return 0; 339f53fbde4SSascha Hauer 340d96be879SSascha Hauer for_each_sg(data->sg, sg, data->sg_len, i) { 3412cb53552SJavier Martin if (sg->offset & 3 || sg->length & 3 || sg->length < 512) { 342d96be879SSascha Hauer host->do_dma = 0; 343656217d2SMartin Fuzzey return 0; 344d96be879SSascha Hauer } 345d96be879SSascha Hauer } 346d96be879SSascha Hauer 34705f5799cSVinod Koul if (data->flags & MMC_DATA_READ) { 348d96be879SSascha Hauer host->dma_dir = DMA_FROM_DEVICE; 34905f5799cSVinod Koul slave_dirn = DMA_DEV_TO_MEM; 35005f5799cSVinod Koul } else { 351d96be879SSascha Hauer host->dma_dir = DMA_TO_DEVICE; 35205f5799cSVinod Koul slave_dirn = DMA_MEM_TO_DEV; 353e48fc15aSAnatolij Gustschin 354e48fc15aSAnatolij Gustschin mxcmci_swap_buffers(data); 35505f5799cSVinod Koul } 356f53fbde4SSascha Hauer 357f53fbde4SSascha Hauer nents = dma_map_sg(host->dma->device->dev, data->sg, 358d96be879SSascha Hauer data->sg_len, host->dma_dir); 359f53fbde4SSascha Hauer if (nents != data->sg_len) 360f53fbde4SSascha Hauer return -EINVAL; 361d96be879SSascha Hauer 36216052827SAlexandre Bounine host->desc = dmaengine_prep_slave_sg(host->dma, 36305f5799cSVinod Koul data->sg, data->sg_len, slave_dirn, 364f53fbde4SSascha Hauer DMA_PREP_INTERRUPT | DMA_CTRL_ACK); 365d96be879SSascha Hauer 366f53fbde4SSascha Hauer if (!host->desc) { 367f53fbde4SSascha Hauer dma_unmap_sg(host->dma->device->dev, data->sg, data->sg_len, 368f53fbde4SSascha Hauer host->dma_dir); 369f53fbde4SSascha Hauer host->do_dma = 0; 370f53fbde4SSascha Hauer return 0; /* Fall back to PIO */ 371656217d2SMartin Fuzzey } 372d96be879SSascha Hauer wmb(); 373d96be879SSascha Hauer 374f53fbde4SSascha Hauer dmaengine_submit(host->desc); 375439aa0efSSascha Hauer dma_async_issue_pending(host->dma); 376f53fbde4SSascha Hauer 377f6ad0a48SJavier Martin mod_timer(&host->watchdog, jiffies + msecs_to_jiffies(MXCMCI_TIMEOUT_MS)); 378f6ad0a48SJavier Martin 379656217d2SMartin Fuzzey return 0; 380d96be879SSascha Hauer } 381d96be879SSascha Hauer 382f6ad0a48SJavier Martin static void mxcmci_cmd_done(struct mxcmci_host *host, unsigned int stat); 383f6ad0a48SJavier Martin static void mxcmci_data_done(struct mxcmci_host *host, unsigned int stat); 384f6ad0a48SJavier Martin 385f6ad0a48SJavier Martin static void mxcmci_dma_callback(void *data) 386f6ad0a48SJavier Martin { 387f6ad0a48SJavier Martin struct mxcmci_host *host = data; 388f6ad0a48SJavier Martin u32 stat; 389f6ad0a48SJavier Martin 390f6ad0a48SJavier Martin del_timer(&host->watchdog); 391f6ad0a48SJavier Martin 392c7ceab02SAnatolij Gustschin stat = mxcmci_readl(host, MMC_REG_STATUS); 393c7ceab02SAnatolij Gustschin mxcmci_writel(host, stat & ~STATUS_DATA_TRANS_DONE, MMC_REG_STATUS); 394f6ad0a48SJavier Martin 395f6ad0a48SJavier Martin dev_dbg(mmc_dev(host->mmc), "%s: 0x%08x\n", __func__, stat); 396f6ad0a48SJavier Martin 397f6ad0a48SJavier Martin if (stat & STATUS_READ_OP_DONE) 398c7ceab02SAnatolij Gustschin mxcmci_writel(host, STATUS_READ_OP_DONE, MMC_REG_STATUS); 399f6ad0a48SJavier Martin 400f6ad0a48SJavier Martin mxcmci_data_done(host, stat); 401f6ad0a48SJavier Martin } 402f6ad0a48SJavier Martin 403d96be879SSascha Hauer static int mxcmci_start_cmd(struct mxcmci_host *host, struct mmc_command *cmd, 404d96be879SSascha Hauer unsigned int cmdat) 405d96be879SSascha Hauer { 40616b3bf8cSEric Bénard u32 int_cntr = host->default_irq_mask; 407f441b993SDaniel Mack unsigned long flags; 408f441b993SDaniel Mack 409d96be879SSascha Hauer WARN_ON(host->cmd != NULL); 410d96be879SSascha Hauer host->cmd = cmd; 411d96be879SSascha Hauer 412d96be879SSascha Hauer switch (mmc_resp_type(cmd)) { 413d96be879SSascha Hauer case MMC_RSP_R1: /* short CRC, OPCODE */ 414d96be879SSascha Hauer case MMC_RSP_R1B:/* short CRC, OPCODE, BUSY */ 415d96be879SSascha Hauer cmdat |= CMD_DAT_CONT_RESPONSE_48BIT_CRC; 416d96be879SSascha Hauer break; 417d96be879SSascha Hauer case MMC_RSP_R2: /* long 136 bit + CRC */ 418d96be879SSascha Hauer cmdat |= CMD_DAT_CONT_RESPONSE_136BIT; 419d96be879SSascha Hauer break; 420d96be879SSascha Hauer case MMC_RSP_R3: /* short */ 421d96be879SSascha Hauer cmdat |= CMD_DAT_CONT_RESPONSE_48BIT; 422d96be879SSascha Hauer break; 423d96be879SSascha Hauer case MMC_RSP_NONE: 424d96be879SSascha Hauer break; 425d96be879SSascha Hauer default: 426d96be879SSascha Hauer dev_err(mmc_dev(host->mmc), "unhandled response type 0x%x\n", 427d96be879SSascha Hauer mmc_resp_type(cmd)); 428d96be879SSascha Hauer cmd->error = -EINVAL; 429d96be879SSascha Hauer return -EINVAL; 430d96be879SSascha Hauer } 431d96be879SSascha Hauer 432f441b993SDaniel Mack int_cntr = INT_END_CMD_RES_EN; 433f441b993SDaniel Mack 434f6ad0a48SJavier Martin if (mxcmci_use_dma(host)) { 435f6ad0a48SJavier Martin if (host->dma_dir == DMA_FROM_DEVICE) { 436f6ad0a48SJavier Martin host->desc->callback = mxcmci_dma_callback; 437f6ad0a48SJavier Martin host->desc->callback_param = host; 438f6ad0a48SJavier Martin } else { 439f6ad0a48SJavier Martin int_cntr |= INT_WRITE_OP_DONE_EN; 440f6ad0a48SJavier Martin } 441f6ad0a48SJavier Martin } 442f441b993SDaniel Mack 443f441b993SDaniel Mack spin_lock_irqsave(&host->lock, flags); 444f441b993SDaniel Mack if (host->use_sdio) 445f441b993SDaniel Mack int_cntr |= INT_SDIO_IRQ_EN; 446c7ceab02SAnatolij Gustschin mxcmci_writel(host, int_cntr, MMC_REG_INT_CNTR); 447f441b993SDaniel Mack spin_unlock_irqrestore(&host->lock, flags); 448d96be879SSascha Hauer 449c7ceab02SAnatolij Gustschin mxcmci_writew(host, cmd->opcode, MMC_REG_CMD); 450c7ceab02SAnatolij Gustschin mxcmci_writel(host, cmd->arg, MMC_REG_ARG); 451c7ceab02SAnatolij Gustschin mxcmci_writew(host, cmdat, MMC_REG_CMD_DAT_CONT); 452d96be879SSascha Hauer 453d96be879SSascha Hauer return 0; 454d96be879SSascha Hauer } 455d96be879SSascha Hauer 456d96be879SSascha Hauer static void mxcmci_finish_request(struct mxcmci_host *host, 457d96be879SSascha Hauer struct mmc_request *req) 458d96be879SSascha Hauer { 45916b3bf8cSEric Bénard u32 int_cntr = host->default_irq_mask; 460f441b993SDaniel Mack unsigned long flags; 461f441b993SDaniel Mack 462f441b993SDaniel Mack spin_lock_irqsave(&host->lock, flags); 463f441b993SDaniel Mack if (host->use_sdio) 464f441b993SDaniel Mack int_cntr |= INT_SDIO_IRQ_EN; 465c7ceab02SAnatolij Gustschin mxcmci_writel(host, int_cntr, MMC_REG_INT_CNTR); 466f441b993SDaniel Mack spin_unlock_irqrestore(&host->lock, flags); 467d96be879SSascha Hauer 468d96be879SSascha Hauer host->req = NULL; 469d96be879SSascha Hauer host->cmd = NULL; 470d96be879SSascha Hauer host->data = NULL; 471d96be879SSascha Hauer 472d96be879SSascha Hauer mmc_request_done(host->mmc, req); 473d96be879SSascha Hauer } 474d96be879SSascha Hauer 475d96be879SSascha Hauer static int mxcmci_finish_data(struct mxcmci_host *host, unsigned int stat) 476d96be879SSascha Hauer { 477d96be879SSascha Hauer struct mmc_data *data = host->data; 478d96be879SSascha Hauer int data_error; 479d96be879SSascha Hauer 480e48fc15aSAnatolij Gustschin if (mxcmci_use_dma(host)) { 481f53fbde4SSascha Hauer dma_unmap_sg(host->dma->device->dev, data->sg, data->sg_len, 482d96be879SSascha Hauer host->dma_dir); 483e48fc15aSAnatolij Gustschin mxcmci_swap_buffers(data); 484e48fc15aSAnatolij Gustschin } 485d96be879SSascha Hauer 486d96be879SSascha Hauer if (stat & STATUS_ERR_MASK) { 487d96be879SSascha Hauer dev_dbg(mmc_dev(host->mmc), "request failed. status: 0x%08x\n", 488d96be879SSascha Hauer stat); 489d96be879SSascha Hauer if (stat & STATUS_CRC_READ_ERR) { 4904725f6f1SDaniel Mack dev_err(mmc_dev(host->mmc), "%s: -EILSEQ\n", __func__); 491d96be879SSascha Hauer data->error = -EILSEQ; 492d96be879SSascha Hauer } else if (stat & STATUS_CRC_WRITE_ERR) { 493d96be879SSascha Hauer u32 err_code = (stat >> 9) & 0x3; 4944725f6f1SDaniel Mack if (err_code == 2) { /* No CRC response */ 4954725f6f1SDaniel Mack dev_err(mmc_dev(host->mmc), 4964725f6f1SDaniel Mack "%s: No CRC -ETIMEDOUT\n", __func__); 497d96be879SSascha Hauer data->error = -ETIMEDOUT; 498d96be879SSascha Hauer } else { 4994725f6f1SDaniel Mack dev_err(mmc_dev(host->mmc), 5004725f6f1SDaniel Mack "%s: -EILSEQ\n", __func__); 5014725f6f1SDaniel Mack data->error = -EILSEQ; 5024725f6f1SDaniel Mack } 5034725f6f1SDaniel Mack } else if (stat & STATUS_TIME_OUT_READ) { 5044725f6f1SDaniel Mack dev_err(mmc_dev(host->mmc), 5054725f6f1SDaniel Mack "%s: read -ETIMEDOUT\n", __func__); 5064725f6f1SDaniel Mack data->error = -ETIMEDOUT; 5074725f6f1SDaniel Mack } else { 5084725f6f1SDaniel Mack dev_err(mmc_dev(host->mmc), "%s: -EIO\n", __func__); 509d96be879SSascha Hauer data->error = -EIO; 510d96be879SSascha Hauer } 511d96be879SSascha Hauer } else { 512d96be879SSascha Hauer data->bytes_xfered = host->datasize; 513d96be879SSascha Hauer } 514d96be879SSascha Hauer 515d96be879SSascha Hauer data_error = data->error; 516d96be879SSascha Hauer 517d96be879SSascha Hauer host->data = NULL; 518d96be879SSascha Hauer 519d96be879SSascha Hauer return data_error; 520d96be879SSascha Hauer } 521d96be879SSascha Hauer 522d96be879SSascha Hauer static void mxcmci_read_response(struct mxcmci_host *host, unsigned int stat) 523d96be879SSascha Hauer { 524d96be879SSascha Hauer struct mmc_command *cmd = host->cmd; 525d96be879SSascha Hauer int i; 526d96be879SSascha Hauer u32 a, b, c; 527d96be879SSascha Hauer 528d96be879SSascha Hauer if (!cmd) 529d96be879SSascha Hauer return; 530d96be879SSascha Hauer 531d96be879SSascha Hauer if (stat & STATUS_TIME_OUT_RESP) { 532d96be879SSascha Hauer dev_dbg(mmc_dev(host->mmc), "CMD TIMEOUT\n"); 533d96be879SSascha Hauer cmd->error = -ETIMEDOUT; 534d96be879SSascha Hauer } else if (stat & STATUS_RESP_CRC_ERR && cmd->flags & MMC_RSP_CRC) { 535d96be879SSascha Hauer dev_dbg(mmc_dev(host->mmc), "cmd crc error\n"); 536d96be879SSascha Hauer cmd->error = -EILSEQ; 537d96be879SSascha Hauer } 538d96be879SSascha Hauer 539d96be879SSascha Hauer if (cmd->flags & MMC_RSP_PRESENT) { 540d96be879SSascha Hauer if (cmd->flags & MMC_RSP_136) { 541d96be879SSascha Hauer for (i = 0; i < 4; i++) { 542c7ceab02SAnatolij Gustschin a = mxcmci_readw(host, MMC_REG_RES_FIFO); 543c7ceab02SAnatolij Gustschin b = mxcmci_readw(host, MMC_REG_RES_FIFO); 544d96be879SSascha Hauer cmd->resp[i] = a << 16 | b; 545d96be879SSascha Hauer } 546d96be879SSascha Hauer } else { 547c7ceab02SAnatolij Gustschin a = mxcmci_readw(host, MMC_REG_RES_FIFO); 548c7ceab02SAnatolij Gustschin b = mxcmci_readw(host, MMC_REG_RES_FIFO); 549c7ceab02SAnatolij Gustschin c = mxcmci_readw(host, MMC_REG_RES_FIFO); 550d96be879SSascha Hauer cmd->resp[0] = a << 24 | b << 8 | c >> 8; 551d96be879SSascha Hauer } 552d96be879SSascha Hauer } 553d96be879SSascha Hauer } 554d96be879SSascha Hauer 555d96be879SSascha Hauer static int mxcmci_poll_status(struct mxcmci_host *host, u32 mask) 556d96be879SSascha Hauer { 557d96be879SSascha Hauer u32 stat; 558d96be879SSascha Hauer unsigned long timeout = jiffies + HZ; 559d96be879SSascha Hauer 560d96be879SSascha Hauer do { 561c7ceab02SAnatolij Gustschin stat = mxcmci_readl(host, MMC_REG_STATUS); 562d96be879SSascha Hauer if (stat & STATUS_ERR_MASK) 563d96be879SSascha Hauer return stat; 56418489fa2SMartin Fuzzey if (time_after(jiffies, timeout)) { 56518489fa2SMartin Fuzzey mxcmci_softreset(host); 56618489fa2SMartin Fuzzey mxcmci_set_clk_rate(host, host->clock); 567d96be879SSascha Hauer return STATUS_TIME_OUT_READ; 56818489fa2SMartin Fuzzey } 569d96be879SSascha Hauer if (stat & mask) 570d96be879SSascha Hauer return 0; 571d96be879SSascha Hauer cpu_relax(); 572d96be879SSascha Hauer } while (1); 573d96be879SSascha Hauer } 574d96be879SSascha Hauer 575d96be879SSascha Hauer static int mxcmci_pull(struct mxcmci_host *host, void *_buf, int bytes) 576d96be879SSascha Hauer { 577d96be879SSascha Hauer unsigned int stat; 578d96be879SSascha Hauer u32 *buf = _buf; 579d96be879SSascha Hauer 580d96be879SSascha Hauer while (bytes > 3) { 581d96be879SSascha Hauer stat = mxcmci_poll_status(host, 582d96be879SSascha Hauer STATUS_BUF_READ_RDY | STATUS_READ_OP_DONE); 583d96be879SSascha Hauer if (stat) 584d96be879SSascha Hauer return stat; 585c7ceab02SAnatolij Gustschin *buf++ = cpu_to_le32(mxcmci_readl(host, MMC_REG_BUFFER_ACCESS)); 586d96be879SSascha Hauer bytes -= 4; 587d96be879SSascha Hauer } 588d96be879SSascha Hauer 589d96be879SSascha Hauer if (bytes) { 590d96be879SSascha Hauer u8 *b = (u8 *)buf; 591d96be879SSascha Hauer u32 tmp; 592d96be879SSascha Hauer 593d96be879SSascha Hauer stat = mxcmci_poll_status(host, 594d96be879SSascha Hauer STATUS_BUF_READ_RDY | STATUS_READ_OP_DONE); 595d96be879SSascha Hauer if (stat) 596d96be879SSascha Hauer return stat; 597c7ceab02SAnatolij Gustschin tmp = cpu_to_le32(mxcmci_readl(host, MMC_REG_BUFFER_ACCESS)); 598d96be879SSascha Hauer memcpy(b, &tmp, bytes); 599d96be879SSascha Hauer } 600d96be879SSascha Hauer 601d96be879SSascha Hauer return 0; 602d96be879SSascha Hauer } 603d96be879SSascha Hauer 604d96be879SSascha Hauer static int mxcmci_push(struct mxcmci_host *host, void *_buf, int bytes) 605d96be879SSascha Hauer { 606d96be879SSascha Hauer unsigned int stat; 607d96be879SSascha Hauer u32 *buf = _buf; 608d96be879SSascha Hauer 609d96be879SSascha Hauer while (bytes > 3) { 610d96be879SSascha Hauer stat = mxcmci_poll_status(host, STATUS_BUF_WRITE_RDY); 611d96be879SSascha Hauer if (stat) 612d96be879SSascha Hauer return stat; 613c7ceab02SAnatolij Gustschin mxcmci_writel(host, cpu_to_le32(*buf++), MMC_REG_BUFFER_ACCESS); 614d96be879SSascha Hauer bytes -= 4; 615d96be879SSascha Hauer } 616d96be879SSascha Hauer 617d96be879SSascha Hauer if (bytes) { 618d96be879SSascha Hauer u8 *b = (u8 *)buf; 619d96be879SSascha Hauer u32 tmp; 620d96be879SSascha Hauer 621d96be879SSascha Hauer stat = mxcmci_poll_status(host, STATUS_BUF_WRITE_RDY); 622d96be879SSascha Hauer if (stat) 623d96be879SSascha Hauer return stat; 624d96be879SSascha Hauer 625d96be879SSascha Hauer memcpy(&tmp, b, bytes); 626c7ceab02SAnatolij Gustschin mxcmci_writel(host, cpu_to_le32(tmp), MMC_REG_BUFFER_ACCESS); 627d96be879SSascha Hauer } 628d96be879SSascha Hauer 629d96be879SSascha Hauer stat = mxcmci_poll_status(host, STATUS_BUF_WRITE_RDY); 630d96be879SSascha Hauer if (stat) 631d96be879SSascha Hauer return stat; 632d96be879SSascha Hauer 633d96be879SSascha Hauer return 0; 634d96be879SSascha Hauer } 635d96be879SSascha Hauer 636d96be879SSascha Hauer static int mxcmci_transfer_data(struct mxcmci_host *host) 637d96be879SSascha Hauer { 638d96be879SSascha Hauer struct mmc_data *data = host->req->data; 639d96be879SSascha Hauer struct scatterlist *sg; 640d96be879SSascha Hauer int stat, i; 641d96be879SSascha Hauer 642d96be879SSascha Hauer host->data = data; 643d96be879SSascha Hauer host->datasize = 0; 644d96be879SSascha Hauer 645d96be879SSascha Hauer if (data->flags & MMC_DATA_READ) { 646d96be879SSascha Hauer for_each_sg(data->sg, sg, data->sg_len, i) { 647d96be879SSascha Hauer stat = mxcmci_pull(host, sg_virt(sg), sg->length); 648d96be879SSascha Hauer if (stat) 649d96be879SSascha Hauer return stat; 650d96be879SSascha Hauer host->datasize += sg->length; 651d96be879SSascha Hauer } 652d96be879SSascha Hauer } else { 653d96be879SSascha Hauer for_each_sg(data->sg, sg, data->sg_len, i) { 654d96be879SSascha Hauer stat = mxcmci_push(host, sg_virt(sg), sg->length); 655d96be879SSascha Hauer if (stat) 656d96be879SSascha Hauer return stat; 657d96be879SSascha Hauer host->datasize += sg->length; 658d96be879SSascha Hauer } 659d96be879SSascha Hauer stat = mxcmci_poll_status(host, STATUS_WRITE_OP_DONE); 660d96be879SSascha Hauer if (stat) 661d96be879SSascha Hauer return stat; 662d96be879SSascha Hauer } 663d96be879SSascha Hauer return 0; 664d96be879SSascha Hauer } 665d96be879SSascha Hauer 666d96be879SSascha Hauer static void mxcmci_datawork(struct work_struct *work) 667d96be879SSascha Hauer { 668d96be879SSascha Hauer struct mxcmci_host *host = container_of(work, struct mxcmci_host, 669d96be879SSascha Hauer datawork); 670d96be879SSascha Hauer int datastat = mxcmci_transfer_data(host); 6714a31f2efSDaniel Mack 672c7ceab02SAnatolij Gustschin mxcmci_writel(host, STATUS_READ_OP_DONE | STATUS_WRITE_OP_DONE, 673c7ceab02SAnatolij Gustschin MMC_REG_STATUS); 674d96be879SSascha Hauer mxcmci_finish_data(host, datastat); 675d96be879SSascha Hauer 676d96be879SSascha Hauer if (host->req->stop) { 677d96be879SSascha Hauer if (mxcmci_start_cmd(host, host->req->stop, 0)) { 678d96be879SSascha Hauer mxcmci_finish_request(host, host->req); 679d96be879SSascha Hauer return; 680d96be879SSascha Hauer } 681d96be879SSascha Hauer } else { 682d96be879SSascha Hauer mxcmci_finish_request(host, host->req); 683d96be879SSascha Hauer } 684d96be879SSascha Hauer } 685d96be879SSascha Hauer 686d96be879SSascha Hauer static void mxcmci_data_done(struct mxcmci_host *host, unsigned int stat) 687d96be879SSascha Hauer { 68870aa6109SAnatolij Gustschin struct mmc_request *req; 689d96be879SSascha Hauer int data_error; 69070aa6109SAnatolij Gustschin unsigned long flags; 691d96be879SSascha Hauer 69270aa6109SAnatolij Gustschin spin_lock_irqsave(&host->lock, flags); 69370aa6109SAnatolij Gustschin 69470aa6109SAnatolij Gustschin if (!host->data) { 69570aa6109SAnatolij Gustschin spin_unlock_irqrestore(&host->lock, flags); 696d96be879SSascha Hauer return; 69770aa6109SAnatolij Gustschin } 69870aa6109SAnatolij Gustschin 69970aa6109SAnatolij Gustschin if (!host->req) { 70070aa6109SAnatolij Gustschin spin_unlock_irqrestore(&host->lock, flags); 70170aa6109SAnatolij Gustschin return; 70270aa6109SAnatolij Gustschin } 70370aa6109SAnatolij Gustschin 70470aa6109SAnatolij Gustschin req = host->req; 70570aa6109SAnatolij Gustschin if (!req->stop) 70670aa6109SAnatolij Gustschin host->req = NULL; /* we will handle finish req below */ 707d96be879SSascha Hauer 708d96be879SSascha Hauer data_error = mxcmci_finish_data(host, stat); 709d96be879SSascha Hauer 71070aa6109SAnatolij Gustschin spin_unlock_irqrestore(&host->lock, flags); 71170aa6109SAnatolij Gustschin 712d96be879SSascha Hauer mxcmci_read_response(host, stat); 713d96be879SSascha Hauer host->cmd = NULL; 714d96be879SSascha Hauer 71570aa6109SAnatolij Gustschin if (req->stop) { 71670aa6109SAnatolij Gustschin if (mxcmci_start_cmd(host, req->stop, 0)) { 71770aa6109SAnatolij Gustschin mxcmci_finish_request(host, req); 718d96be879SSascha Hauer return; 719d96be879SSascha Hauer } 720d96be879SSascha Hauer } else { 72170aa6109SAnatolij Gustschin mxcmci_finish_request(host, req); 722d96be879SSascha Hauer } 723d96be879SSascha Hauer } 724d96be879SSascha Hauer 725d96be879SSascha Hauer static void mxcmci_cmd_done(struct mxcmci_host *host, unsigned int stat) 726d96be879SSascha Hauer { 727d96be879SSascha Hauer mxcmci_read_response(host, stat); 728d96be879SSascha Hauer host->cmd = NULL; 729d96be879SSascha Hauer 730d96be879SSascha Hauer if (!host->data && host->req) { 731d96be879SSascha Hauer mxcmci_finish_request(host, host->req); 732d96be879SSascha Hauer return; 733d96be879SSascha Hauer } 734d96be879SSascha Hauer 735d96be879SSascha Hauer /* For the DMA case the DMA engine handles the data transfer 736fd589a8fSAnand Gadiyar * automatically. For non DMA we have to do it ourselves. 737d96be879SSascha Hauer * Don't do it in interrupt context though. 738d96be879SSascha Hauer */ 739d96be879SSascha Hauer if (!mxcmci_use_dma(host) && host->data) 740d96be879SSascha Hauer schedule_work(&host->datawork); 741d96be879SSascha Hauer 742d96be879SSascha Hauer } 743d96be879SSascha Hauer 744d96be879SSascha Hauer static irqreturn_t mxcmci_irq(int irq, void *devid) 745d96be879SSascha Hauer { 746d96be879SSascha Hauer struct mxcmci_host *host = devid; 747f441b993SDaniel Mack unsigned long flags; 748f441b993SDaniel Mack bool sdio_irq; 749d96be879SSascha Hauer u32 stat; 750d96be879SSascha Hauer 751c7ceab02SAnatolij Gustschin stat = mxcmci_readl(host, MMC_REG_STATUS); 752c7ceab02SAnatolij Gustschin mxcmci_writel(host, 753c7ceab02SAnatolij Gustschin stat & ~(STATUS_SDIO_INT_ACTIVE | STATUS_DATA_TRANS_DONE | 754c7ceab02SAnatolij Gustschin STATUS_WRITE_OP_DONE), 755c7ceab02SAnatolij Gustschin MMC_REG_STATUS); 756d96be879SSascha Hauer 757d96be879SSascha Hauer dev_dbg(mmc_dev(host->mmc), "%s: 0x%08x\n", __func__, stat); 758d96be879SSascha Hauer 759f441b993SDaniel Mack spin_lock_irqsave(&host->lock, flags); 760f441b993SDaniel Mack sdio_irq = (stat & STATUS_SDIO_INT_ACTIVE) && host->use_sdio; 761f441b993SDaniel Mack spin_unlock_irqrestore(&host->lock, flags); 762f441b993SDaniel Mack 7634a31f2efSDaniel Mack if (mxcmci_use_dma(host) && 7644a31f2efSDaniel Mack (stat & (STATUS_READ_OP_DONE | STATUS_WRITE_OP_DONE))) 765c7ceab02SAnatolij Gustschin mxcmci_writel(host, STATUS_READ_OP_DONE | STATUS_WRITE_OP_DONE, 766c7ceab02SAnatolij Gustschin MMC_REG_STATUS); 7674a31f2efSDaniel Mack 768f441b993SDaniel Mack if (sdio_irq) { 769c7ceab02SAnatolij Gustschin mxcmci_writel(host, STATUS_SDIO_INT_ACTIVE, MMC_REG_STATUS); 770f441b993SDaniel Mack mmc_signal_sdio_irq(host->mmc); 771f441b993SDaniel Mack } 772f441b993SDaniel Mack 773d96be879SSascha Hauer if (stat & STATUS_END_CMD_RESP) 774d96be879SSascha Hauer mxcmci_cmd_done(host, stat); 775f441b993SDaniel Mack 776d96be879SSascha Hauer if (mxcmci_use_dma(host) && 777f6ad0a48SJavier Martin (stat & (STATUS_DATA_TRANS_DONE | STATUS_WRITE_OP_DONE))) { 778f6ad0a48SJavier Martin del_timer(&host->watchdog); 779d96be879SSascha Hauer mxcmci_data_done(host, stat); 780f6ad0a48SJavier Martin } 781f53fbde4SSascha Hauer 78216b3bf8cSEric Bénard if (host->default_irq_mask && 78316b3bf8cSEric Bénard (stat & (STATUS_CARD_INSERTION | STATUS_CARD_REMOVAL))) 78416b3bf8cSEric Bénard mmc_detect_change(host->mmc, msecs_to_jiffies(200)); 785f53fbde4SSascha Hauer 786d96be879SSascha Hauer return IRQ_HANDLED; 787d96be879SSascha Hauer } 788d96be879SSascha Hauer 789d96be879SSascha Hauer static void mxcmci_request(struct mmc_host *mmc, struct mmc_request *req) 790d96be879SSascha Hauer { 791d96be879SSascha Hauer struct mxcmci_host *host = mmc_priv(mmc); 792d96be879SSascha Hauer unsigned int cmdat = host->cmdat; 793656217d2SMartin Fuzzey int error; 794d96be879SSascha Hauer 795d96be879SSascha Hauer WARN_ON(host->req != NULL); 796d96be879SSascha Hauer 797d96be879SSascha Hauer host->req = req; 798d96be879SSascha Hauer host->cmdat &= ~CMD_DAT_CONT_INIT; 799f53fbde4SSascha Hauer 800f53fbde4SSascha Hauer if (host->dma) 801d96be879SSascha Hauer host->do_dma = 1; 802f53fbde4SSascha Hauer 803d96be879SSascha Hauer if (req->data) { 804656217d2SMartin Fuzzey error = mxcmci_setup_data(host, req->data); 805656217d2SMartin Fuzzey if (error) { 806656217d2SMartin Fuzzey req->cmd->error = error; 807656217d2SMartin Fuzzey goto out; 808656217d2SMartin Fuzzey } 809656217d2SMartin Fuzzey 810d96be879SSascha Hauer 811d96be879SSascha Hauer cmdat |= CMD_DAT_CONT_DATA_ENABLE; 812d96be879SSascha Hauer 813d96be879SSascha Hauer if (req->data->flags & MMC_DATA_WRITE) 814d96be879SSascha Hauer cmdat |= CMD_DAT_CONT_WRITE; 815d96be879SSascha Hauer } 816d96be879SSascha Hauer 817656217d2SMartin Fuzzey error = mxcmci_start_cmd(host, req->cmd, cmdat); 818f53fbde4SSascha Hauer 819656217d2SMartin Fuzzey out: 820656217d2SMartin Fuzzey if (error) 821d96be879SSascha Hauer mxcmci_finish_request(host, req); 822d96be879SSascha Hauer } 823d96be879SSascha Hauer 824d96be879SSascha Hauer static void mxcmci_set_clk_rate(struct mxcmci_host *host, unsigned int clk_ios) 825d96be879SSascha Hauer { 826d96be879SSascha Hauer unsigned int divider; 827d96be879SSascha Hauer int prescaler = 0; 828529aa29eSSascha Hauer unsigned int clk_in = clk_get_rate(host->clk_per); 829d96be879SSascha Hauer 830d96be879SSascha Hauer while (prescaler <= 0x800) { 831d96be879SSascha Hauer for (divider = 1; divider <= 0xF; divider++) { 832d96be879SSascha Hauer int x; 833d96be879SSascha Hauer 834d96be879SSascha Hauer x = (clk_in / (divider + 1)); 835d96be879SSascha Hauer 836d96be879SSascha Hauer if (prescaler) 837d96be879SSascha Hauer x /= (prescaler * 2); 838d96be879SSascha Hauer 839d96be879SSascha Hauer if (x <= clk_ios) 840d96be879SSascha Hauer break; 841d96be879SSascha Hauer } 842d96be879SSascha Hauer if (divider < 0x10) 843d96be879SSascha Hauer break; 844d96be879SSascha Hauer 845d96be879SSascha Hauer if (prescaler == 0) 846d96be879SSascha Hauer prescaler = 1; 847d96be879SSascha Hauer else 848d96be879SSascha Hauer prescaler <<= 1; 849d96be879SSascha Hauer } 850d96be879SSascha Hauer 851c7ceab02SAnatolij Gustschin mxcmci_writew(host, (prescaler << 4) | divider, MMC_REG_CLK_RATE); 852d96be879SSascha Hauer 853d96be879SSascha Hauer dev_dbg(mmc_dev(host->mmc), "scaler: %d divider: %d in: %d out: %d\n", 854d96be879SSascha Hauer prescaler, divider, clk_in, clk_ios); 855d96be879SSascha Hauer } 856d96be879SSascha Hauer 857f53fbde4SSascha Hauer static int mxcmci_setup_dma(struct mmc_host *mmc) 858f53fbde4SSascha Hauer { 859f53fbde4SSascha Hauer struct mxcmci_host *host = mmc_priv(mmc); 860f53fbde4SSascha Hauer struct dma_slave_config *config = &host->dma_slave_config; 861f53fbde4SSascha Hauer 86201e4f958SAlexander Shiyan config->dst_addr = host->phys_base + MMC_REG_BUFFER_ACCESS; 86301e4f958SAlexander Shiyan config->src_addr = host->phys_base + MMC_REG_BUFFER_ACCESS; 864f53fbde4SSascha Hauer config->dst_addr_width = 4; 865f53fbde4SSascha Hauer config->src_addr_width = 4; 866f53fbde4SSascha Hauer config->dst_maxburst = host->burstlen; 867f53fbde4SSascha Hauer config->src_maxburst = host->burstlen; 868258aea76SViresh Kumar config->device_fc = false; 869f53fbde4SSascha Hauer 870f53fbde4SSascha Hauer return dmaengine_slave_config(host->dma, config); 871f53fbde4SSascha Hauer } 872f53fbde4SSascha Hauer 873d96be879SSascha Hauer static void mxcmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) 874d96be879SSascha Hauer { 875d96be879SSascha Hauer struct mxcmci_host *host = mmc_priv(mmc); 876f53fbde4SSascha Hauer int burstlen, ret; 877f53fbde4SSascha Hauer 878d96be879SSascha Hauer /* 8796584cb88SSascha Hauer * use burstlen of 64 (16 words) in 4 bit mode (--> reg value 0) 8806584cb88SSascha Hauer * use burstlen of 16 (4 words) in 1 bit mode (--> reg value 16) 881d96be879SSascha Hauer */ 882d96be879SSascha Hauer if (ios->bus_width == MMC_BUS_WIDTH_4) 883f53fbde4SSascha Hauer burstlen = 16; 8846584cb88SSascha Hauer else 8856584cb88SSascha Hauer burstlen = 4; 886d96be879SSascha Hauer 887f53fbde4SSascha Hauer if (mxcmci_use_dma(host) && burstlen != host->burstlen) { 888f53fbde4SSascha Hauer host->burstlen = burstlen; 889f53fbde4SSascha Hauer ret = mxcmci_setup_dma(mmc); 890f53fbde4SSascha Hauer if (ret) { 891f53fbde4SSascha Hauer dev_err(mmc_dev(host->mmc), 892f53fbde4SSascha Hauer "failed to config DMA channel. Falling back to PIO\n"); 893f53fbde4SSascha Hauer dma_release_channel(host->dma); 894f53fbde4SSascha Hauer host->do_dma = 0; 895e58f516fSSascha Hauer host->dma = NULL; 896f53fbde4SSascha Hauer } 897f53fbde4SSascha Hauer } 898f53fbde4SSascha Hauer 899d96be879SSascha Hauer if (ios->bus_width == MMC_BUS_WIDTH_4) 900d96be879SSascha Hauer host->cmdat |= CMD_DAT_CONT_BUS_WIDTH_4; 901d96be879SSascha Hauer else 902d96be879SSascha Hauer host->cmdat &= ~CMD_DAT_CONT_BUS_WIDTH_4; 903d96be879SSascha Hauer 904d96be879SSascha Hauer if (host->power_mode != ios->power_mode) { 905d078d242SAlberto Panizzo mxcmci_set_power(host, ios->power_mode, ios->vdd); 906d96be879SSascha Hauer host->power_mode = ios->power_mode; 90774b66954SAlberto Panizzo 908d96be879SSascha Hauer if (ios->power_mode == MMC_POWER_ON) 909d96be879SSascha Hauer host->cmdat |= CMD_DAT_CONT_INIT; 910d96be879SSascha Hauer } 911d96be879SSascha Hauer 912d96be879SSascha Hauer if (ios->clock) { 913d96be879SSascha Hauer mxcmci_set_clk_rate(host, ios->clock); 914c7ceab02SAnatolij Gustschin mxcmci_writew(host, STR_STP_CLK_START_CLK, MMC_REG_STR_STP_CLK); 915d96be879SSascha Hauer } else { 916c7ceab02SAnatolij Gustschin mxcmci_writew(host, STR_STP_CLK_STOP_CLK, MMC_REG_STR_STP_CLK); 917d96be879SSascha Hauer } 918d96be879SSascha Hauer 919d96be879SSascha Hauer host->clock = ios->clock; 920d96be879SSascha Hauer } 921d96be879SSascha Hauer 922d96be879SSascha Hauer static irqreturn_t mxcmci_detect_irq(int irq, void *data) 923d96be879SSascha Hauer { 924d96be879SSascha Hauer struct mmc_host *mmc = data; 925d96be879SSascha Hauer 926d96be879SSascha Hauer dev_dbg(mmc_dev(mmc), "%s\n", __func__); 927d96be879SSascha Hauer 928d96be879SSascha Hauer mmc_detect_change(mmc, msecs_to_jiffies(250)); 929d96be879SSascha Hauer return IRQ_HANDLED; 930d96be879SSascha Hauer } 931d96be879SSascha Hauer 932d96be879SSascha Hauer static int mxcmci_get_ro(struct mmc_host *mmc) 933d96be879SSascha Hauer { 934d96be879SSascha Hauer struct mxcmci_host *host = mmc_priv(mmc); 935d96be879SSascha Hauer 936d96be879SSascha Hauer if (host->pdata && host->pdata->get_ro) 937d96be879SSascha Hauer return !!host->pdata->get_ro(mmc_dev(mmc)); 938d96be879SSascha Hauer /* 939bcf53524SAnatolij Gustschin * If board doesn't support read only detection (no mmc_gpio 940bcf53524SAnatolij Gustschin * context or gpio is invalid), then let the mmc core decide 941bcf53524SAnatolij Gustschin * what to do. 942d96be879SSascha Hauer */ 943bcf53524SAnatolij Gustschin return mmc_gpio_get_ro(mmc); 944d96be879SSascha Hauer } 945d96be879SSascha Hauer 946f441b993SDaniel Mack static void mxcmci_enable_sdio_irq(struct mmc_host *mmc, int enable) 947f441b993SDaniel Mack { 948f441b993SDaniel Mack struct mxcmci_host *host = mmc_priv(mmc); 949f441b993SDaniel Mack unsigned long flags; 950f441b993SDaniel Mack u32 int_cntr; 951f441b993SDaniel Mack 952f441b993SDaniel Mack spin_lock_irqsave(&host->lock, flags); 953f441b993SDaniel Mack host->use_sdio = enable; 954c7ceab02SAnatolij Gustschin int_cntr = mxcmci_readl(host, MMC_REG_INT_CNTR); 955f441b993SDaniel Mack 956f441b993SDaniel Mack if (enable) 957f441b993SDaniel Mack int_cntr |= INT_SDIO_IRQ_EN; 958f441b993SDaniel Mack else 959f441b993SDaniel Mack int_cntr &= ~INT_SDIO_IRQ_EN; 960f441b993SDaniel Mack 961c7ceab02SAnatolij Gustschin mxcmci_writel(host, int_cntr, MMC_REG_INT_CNTR); 962f441b993SDaniel Mack spin_unlock_irqrestore(&host->lock, flags); 963f441b993SDaniel Mack } 964d96be879SSascha Hauer 9653fcb027dSDaniel Mack static void mxcmci_init_card(struct mmc_host *host, struct mmc_card *card) 9663fcb027dSDaniel Mack { 9677f917a8dSShawn Guo struct mxcmci_host *mxcmci = mmc_priv(host); 9687f917a8dSShawn Guo 9693fcb027dSDaniel Mack /* 9703fcb027dSDaniel Mack * MX3 SoCs have a silicon bug which corrupts CRC calculation of 9713fcb027dSDaniel Mack * multi-block transfers when connected SDIO peripheral doesn't 9723fcb027dSDaniel Mack * drive the BUSY line as required by the specs. 9733fcb027dSDaniel Mack * One way to prevent this is to only allow 1-bit transfers. 9743fcb027dSDaniel Mack */ 9753fcb027dSDaniel Mack 9767f917a8dSShawn Guo if (is_imx31_mmc(mxcmci) && card->type == MMC_TYPE_SDIO) 9773fcb027dSDaniel Mack host->caps &= ~MMC_CAP_4_BIT_DATA; 9783fcb027dSDaniel Mack else 9793fcb027dSDaniel Mack host->caps |= MMC_CAP_4_BIT_DATA; 9803fcb027dSDaniel Mack } 9813fcb027dSDaniel Mack 982f53fbde4SSascha Hauer static bool filter(struct dma_chan *chan, void *param) 983f53fbde4SSascha Hauer { 984f53fbde4SSascha Hauer struct mxcmci_host *host = param; 985f53fbde4SSascha Hauer 986f53fbde4SSascha Hauer if (!imx_dma_is_general_purpose(chan)) 987f53fbde4SSascha Hauer return false; 988f53fbde4SSascha Hauer 989f53fbde4SSascha Hauer chan->private = &host->dma_data; 990f53fbde4SSascha Hauer 991f53fbde4SSascha Hauer return true; 992f53fbde4SSascha Hauer } 993f53fbde4SSascha Hauer 994f6ad0a48SJavier Martin static void mxcmci_watchdog(unsigned long data) 995f6ad0a48SJavier Martin { 996f6ad0a48SJavier Martin struct mmc_host *mmc = (struct mmc_host *)data; 997f6ad0a48SJavier Martin struct mxcmci_host *host = mmc_priv(mmc); 998f6ad0a48SJavier Martin struct mmc_request *req = host->req; 999c7ceab02SAnatolij Gustschin unsigned int stat = mxcmci_readl(host, MMC_REG_STATUS); 1000f6ad0a48SJavier Martin 1001f6ad0a48SJavier Martin if (host->dma_dir == DMA_FROM_DEVICE) { 1002f6ad0a48SJavier Martin dmaengine_terminate_all(host->dma); 1003f6ad0a48SJavier Martin dev_err(mmc_dev(host->mmc), 1004f6ad0a48SJavier Martin "%s: read time out (status = 0x%08x)\n", 1005f6ad0a48SJavier Martin __func__, stat); 1006f6ad0a48SJavier Martin } else { 1007f6ad0a48SJavier Martin dev_err(mmc_dev(host->mmc), 1008f6ad0a48SJavier Martin "%s: write time out (status = 0x%08x)\n", 1009f6ad0a48SJavier Martin __func__, stat); 1010f6ad0a48SJavier Martin mxcmci_softreset(host); 1011f6ad0a48SJavier Martin } 1012f6ad0a48SJavier Martin 1013f6ad0a48SJavier Martin /* Mark transfer as erroneus and inform the upper layers */ 1014f6ad0a48SJavier Martin 101570aa6109SAnatolij Gustschin if (host->data) 1016f6ad0a48SJavier Martin host->data->error = -ETIMEDOUT; 1017f6ad0a48SJavier Martin host->req = NULL; 1018f6ad0a48SJavier Martin host->cmd = NULL; 1019f6ad0a48SJavier Martin host->data = NULL; 1020f6ad0a48SJavier Martin mmc_request_done(host->mmc, req); 1021f6ad0a48SJavier Martin } 1022f6ad0a48SJavier Martin 1023d96be879SSascha Hauer static const struct mmc_host_ops mxcmci_ops = { 1024d96be879SSascha Hauer .request = mxcmci_request, 1025d96be879SSascha Hauer .set_ios = mxcmci_set_ios, 1026d96be879SSascha Hauer .get_ro = mxcmci_get_ro, 1027f441b993SDaniel Mack .enable_sdio_irq = mxcmci_enable_sdio_irq, 10283fcb027dSDaniel Mack .init_card = mxcmci_init_card, 1029d96be879SSascha Hauer }; 1030d96be879SSascha Hauer 1031d96be879SSascha Hauer static int mxcmci_probe(struct platform_device *pdev) 1032d96be879SSascha Hauer { 1033d96be879SSascha Hauer struct mmc_host *mmc; 103401e4f958SAlexander Shiyan struct mxcmci_host *host; 103501e4f958SAlexander Shiyan struct resource *res; 1036d96be879SSascha Hauer int ret = 0, irq; 10377ff747c4SMarkus Pargmann bool dat3_card_detect = false; 1038f53fbde4SSascha Hauer dma_cap_mask_t mask; 10397ff747c4SMarkus Pargmann const struct of_device_id *of_id; 10407ff747c4SMarkus Pargmann struct imxmmc_platform_data *pdata = pdev->dev.platform_data; 1041d96be879SSascha Hauer 1042c7ceab02SAnatolij Gustschin pr_info("i.MX/MPC512x SDHC driver\n"); 1043d96be879SSascha Hauer 10447ff747c4SMarkus Pargmann of_id = of_match_device(mxcmci_of_match, &pdev->dev); 10457ff747c4SMarkus Pargmann 104601e4f958SAlexander Shiyan res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 1047d96be879SSascha Hauer irq = platform_get_irq(pdev, 0); 104801e4f958SAlexander Shiyan if (irq < 0) 1049d96be879SSascha Hauer return -EINVAL; 1050d96be879SSascha Hauer 105101e4f958SAlexander Shiyan mmc = mmc_alloc_host(sizeof(*host), &pdev->dev); 105201e4f958SAlexander Shiyan if (!mmc) 105301e4f958SAlexander Shiyan return -ENOMEM; 1054d96be879SSascha Hauer 105501e4f958SAlexander Shiyan host = mmc_priv(mmc); 105601e4f958SAlexander Shiyan 105701e4f958SAlexander Shiyan host->base = devm_ioremap_resource(&pdev->dev, res); 105801e4f958SAlexander Shiyan if (IS_ERR(host->base)) { 105901e4f958SAlexander Shiyan ret = PTR_ERR(host->base); 106001e4f958SAlexander Shiyan goto out_free; 1061d96be879SSascha Hauer } 1062d96be879SSascha Hauer 106301e4f958SAlexander Shiyan host->phys_base = res->start; 106401e4f958SAlexander Shiyan 1065b8857696SSimon Baatz ret = mmc_of_parse(mmc); 1066b8857696SSimon Baatz if (ret) 1067b8857696SSimon Baatz goto out_free; 1068d96be879SSascha Hauer mmc->ops = &mxcmci_ops; 10697ff747c4SMarkus Pargmann 10707ff747c4SMarkus Pargmann /* For devicetree parsing, the bus width is read from devicetree */ 10717ff747c4SMarkus Pargmann if (pdata) 1072f441b993SDaniel Mack mmc->caps = MMC_CAP_4_BIT_DATA | MMC_CAP_SDIO_IRQ; 10737ff747c4SMarkus Pargmann else 10747ff747c4SMarkus Pargmann mmc->caps |= MMC_CAP_SDIO_IRQ; 1075d96be879SSascha Hauer 1076d96be879SSascha Hauer /* MMC core transfer sizes tunable parameters */ 1077d96be879SSascha Hauer mmc->max_blk_size = 2048; 1078d96be879SSascha Hauer mmc->max_blk_count = 65535; 1079d96be879SSascha Hauer mmc->max_req_size = mmc->max_blk_size * mmc->max_blk_count; 1080d759c374SVladimir Zapolskiy mmc->max_seg_size = mmc->max_req_size; 1081d96be879SSascha Hauer 10827ff747c4SMarkus Pargmann if (of_id) { 10837ff747c4SMarkus Pargmann const struct platform_device_id *id_entry = of_id->data; 10847ff747c4SMarkus Pargmann host->devtype = id_entry->driver_data; 10857ff747c4SMarkus Pargmann } else { 10867f917a8dSShawn Guo host->devtype = pdev->id_entry->driver_data; 10877ff747c4SMarkus Pargmann } 1088e48fc15aSAnatolij Gustschin 1089e48fc15aSAnatolij Gustschin /* adjust max_segs after devtype detection */ 1090e48fc15aSAnatolij Gustschin if (!is_mpc512x_mmc(host)) 1091e48fc15aSAnatolij Gustschin mmc->max_segs = 64; 1092e48fc15aSAnatolij Gustschin 10937ff747c4SMarkus Pargmann host->mmc = mmc; 10947ff747c4SMarkus Pargmann host->pdata = pdata; 1095f441b993SDaniel Mack spin_lock_init(&host->lock); 1096d96be879SSascha Hauer 10977ff747c4SMarkus Pargmann if (pdata) 10987ff747c4SMarkus Pargmann dat3_card_detect = pdata->dat3_card_detect; 10997ff747c4SMarkus Pargmann else if (!(mmc->caps & MMC_CAP_NONREMOVABLE) 11007ff747c4SMarkus Pargmann && !of_property_read_bool(pdev->dev.of_node, "cd-gpios")) 11017ff747c4SMarkus Pargmann dat3_card_detect = true; 11027ff747c4SMarkus Pargmann 110374b66954SAlberto Panizzo mxcmci_init_ocr(host); 1104d96be879SSascha Hauer 11057ff747c4SMarkus Pargmann if (dat3_card_detect) 110616b3bf8cSEric Bénard host->default_irq_mask = 110716b3bf8cSEric Bénard INT_CARD_INSERTION_EN | INT_CARD_REMOVAL_EN; 110816b3bf8cSEric Bénard else 110916b3bf8cSEric Bénard host->default_irq_mask = 0; 111016b3bf8cSEric Bénard 1111529aa29eSSascha Hauer host->clk_ipg = devm_clk_get(&pdev->dev, "ipg"); 1112529aa29eSSascha Hauer if (IS_ERR(host->clk_ipg)) { 1113529aa29eSSascha Hauer ret = PTR_ERR(host->clk_ipg); 111401e4f958SAlexander Shiyan goto out_free; 1115d96be879SSascha Hauer } 1116529aa29eSSascha Hauer 1117529aa29eSSascha Hauer host->clk_per = devm_clk_get(&pdev->dev, "per"); 1118529aa29eSSascha Hauer if (IS_ERR(host->clk_per)) { 1119529aa29eSSascha Hauer ret = PTR_ERR(host->clk_per); 112001e4f958SAlexander Shiyan goto out_free; 1121529aa29eSSascha Hauer } 1122529aa29eSSascha Hauer 1123529aa29eSSascha Hauer clk_prepare_enable(host->clk_per); 1124529aa29eSSascha Hauer clk_prepare_enable(host->clk_ipg); 1125d96be879SSascha Hauer 1126d96be879SSascha Hauer mxcmci_softreset(host); 1127d96be879SSascha Hauer 1128c7ceab02SAnatolij Gustschin host->rev_no = mxcmci_readw(host, MMC_REG_REV_NO); 1129d96be879SSascha Hauer if (host->rev_no != 0x400) { 1130d96be879SSascha Hauer ret = -ENODEV; 1131d96be879SSascha Hauer dev_err(mmc_dev(host->mmc), "wrong rev.no. 0x%08x. aborting.\n", 1132d96be879SSascha Hauer host->rev_no); 1133d96be879SSascha Hauer goto out_clk_put; 1134d96be879SSascha Hauer } 1135d96be879SSascha Hauer 1136529aa29eSSascha Hauer mmc->f_min = clk_get_rate(host->clk_per) >> 16; 1137529aa29eSSascha Hauer mmc->f_max = clk_get_rate(host->clk_per) >> 1; 1138d96be879SSascha Hauer 1139d96be879SSascha Hauer /* recommended in data sheet */ 1140c7ceab02SAnatolij Gustschin mxcmci_writew(host, 0x2db4, MMC_REG_READ_TO); 1141d96be879SSascha Hauer 1142c7ceab02SAnatolij Gustschin mxcmci_writel(host, host->default_irq_mask, MMC_REG_INT_CNTR); 1143d96be879SSascha Hauer 11447ff747c4SMarkus Pargmann if (!host->pdata) { 11457ff747c4SMarkus Pargmann host->dma = dma_request_slave_channel(&pdev->dev, "rx-tx"); 11467ff747c4SMarkus Pargmann } else { 114701e4f958SAlexander Shiyan res = platform_get_resource(pdev, IORESOURCE_DMA, 0); 114801e4f958SAlexander Shiyan if (res) { 114901e4f958SAlexander Shiyan host->dmareq = res->start; 1150f53fbde4SSascha Hauer host->dma_data.peripheral_type = IMX_DMATYPE_SDHC; 1151f53fbde4SSascha Hauer host->dma_data.priority = DMA_PRIO_LOW; 1152f53fbde4SSascha Hauer host->dma_data.dma_request = host->dmareq; 1153f53fbde4SSascha Hauer dma_cap_zero(mask); 1154f53fbde4SSascha Hauer dma_cap_set(DMA_SLAVE, mask); 1155f53fbde4SSascha Hauer host->dma = dma_request_channel(mask, filter, host); 11567ff747c4SMarkus Pargmann } 11577ff747c4SMarkus Pargmann } 1158f53fbde4SSascha Hauer if (host->dma) 1159f53fbde4SSascha Hauer mmc->max_seg_size = dma_get_max_seg_size( 1160f53fbde4SSascha Hauer host->dma->device->dev); 11617ff747c4SMarkus Pargmann else 1162f53fbde4SSascha Hauer dev_info(mmc_dev(host->mmc), "dma not available. Using PIO\n"); 1163f53fbde4SSascha Hauer 1164d96be879SSascha Hauer INIT_WORK(&host->datawork, mxcmci_datawork); 1165d96be879SSascha Hauer 116601e4f958SAlexander Shiyan ret = devm_request_irq(&pdev->dev, irq, mxcmci_irq, 0, 116701e4f958SAlexander Shiyan dev_name(&pdev->dev), host); 1168d96be879SSascha Hauer if (ret) 1169d96be879SSascha Hauer goto out_free_dma; 1170d96be879SSascha Hauer 1171d96be879SSascha Hauer platform_set_drvdata(pdev, mmc); 1172d96be879SSascha Hauer 1173d96be879SSascha Hauer if (host->pdata && host->pdata->init) { 1174d96be879SSascha Hauer ret = host->pdata->init(&pdev->dev, mxcmci_detect_irq, 1175d96be879SSascha Hauer host->mmc); 1176d96be879SSascha Hauer if (ret) 117701e4f958SAlexander Shiyan goto out_free_dma; 1178d96be879SSascha Hauer } 1179d96be879SSascha Hauer 1180f6ad0a48SJavier Martin init_timer(&host->watchdog); 1181f6ad0a48SJavier Martin host->watchdog.function = &mxcmci_watchdog; 1182f6ad0a48SJavier Martin host->watchdog.data = (unsigned long)mmc; 1183f6ad0a48SJavier Martin 1184abd4190fSAlexander Shiyan mmc_add_host(mmc); 1185abd4190fSAlexander Shiyan 1186d96be879SSascha Hauer return 0; 1187d96be879SSascha Hauer 1188d96be879SSascha Hauer out_free_dma: 1189f53fbde4SSascha Hauer if (host->dma) 1190f53fbde4SSascha Hauer dma_release_channel(host->dma); 119101e4f958SAlexander Shiyan 1192d96be879SSascha Hauer out_clk_put: 1193529aa29eSSascha Hauer clk_disable_unprepare(host->clk_per); 1194529aa29eSSascha Hauer clk_disable_unprepare(host->clk_ipg); 119501e4f958SAlexander Shiyan 1196d96be879SSascha Hauer out_free: 1197d96be879SSascha Hauer mmc_free_host(mmc); 119801e4f958SAlexander Shiyan 1199d96be879SSascha Hauer return ret; 1200d96be879SSascha Hauer } 1201d96be879SSascha Hauer 1202d96be879SSascha Hauer static int mxcmci_remove(struct platform_device *pdev) 1203d96be879SSascha Hauer { 1204d96be879SSascha Hauer struct mmc_host *mmc = platform_get_drvdata(pdev); 1205d96be879SSascha Hauer struct mxcmci_host *host = mmc_priv(mmc); 1206d96be879SSascha Hauer 1207d96be879SSascha Hauer mmc_remove_host(mmc); 1208d96be879SSascha Hauer 1209d96be879SSascha Hauer if (host->pdata && host->pdata->exit) 1210d96be879SSascha Hauer host->pdata->exit(&pdev->dev, mmc); 1211d96be879SSascha Hauer 1212f53fbde4SSascha Hauer if (host->dma) 1213f53fbde4SSascha Hauer dma_release_channel(host->dma); 1214f53fbde4SSascha Hauer 1215529aa29eSSascha Hauer clk_disable_unprepare(host->clk_per); 1216529aa29eSSascha Hauer clk_disable_unprepare(host->clk_ipg); 1217d96be879SSascha Hauer 1218d96be879SSascha Hauer mmc_free_host(mmc); 1219d96be879SSascha Hauer 1220d96be879SSascha Hauer return 0; 1221d96be879SSascha Hauer } 1222d96be879SSascha Hauer 1223d96be879SSascha Hauer #ifdef CONFIG_PM 1224a7d403cfSEric Bénard static int mxcmci_suspend(struct device *dev) 1225d96be879SSascha Hauer { 1226a7d403cfSEric Bénard struct mmc_host *mmc = dev_get_drvdata(dev); 1227a7d403cfSEric Bénard struct mxcmci_host *host = mmc_priv(mmc); 1228d96be879SSascha Hauer 1229529aa29eSSascha Hauer clk_disable_unprepare(host->clk_per); 1230529aa29eSSascha Hauer clk_disable_unprepare(host->clk_ipg); 1231bd190f90SUlf Hansson return 0; 1232d96be879SSascha Hauer } 1233d96be879SSascha Hauer 1234a7d403cfSEric Bénard static int mxcmci_resume(struct device *dev) 1235d96be879SSascha Hauer { 1236a7d403cfSEric Bénard struct mmc_host *mmc = dev_get_drvdata(dev); 1237a7d403cfSEric Bénard struct mxcmci_host *host = mmc_priv(mmc); 1238d96be879SSascha Hauer 1239529aa29eSSascha Hauer clk_prepare_enable(host->clk_per); 1240529aa29eSSascha Hauer clk_prepare_enable(host->clk_ipg); 1241bd190f90SUlf Hansson return 0; 1242d96be879SSascha Hauer } 1243a7d403cfSEric Bénard 1244a7d403cfSEric Bénard static const struct dev_pm_ops mxcmci_pm_ops = { 1245a7d403cfSEric Bénard .suspend = mxcmci_suspend, 1246a7d403cfSEric Bénard .resume = mxcmci_resume, 1247a7d403cfSEric Bénard }; 1248a7d403cfSEric Bénard #endif 1249d96be879SSascha Hauer 1250d96be879SSascha Hauer static struct platform_driver mxcmci_driver = { 1251d96be879SSascha Hauer .probe = mxcmci_probe, 1252d96be879SSascha Hauer .remove = mxcmci_remove, 12537f917a8dSShawn Guo .id_table = mxcmci_devtype, 1254d96be879SSascha Hauer .driver = { 1255d96be879SSascha Hauer .name = DRIVER_NAME, 1256d96be879SSascha Hauer .owner = THIS_MODULE, 1257a7d403cfSEric Bénard #ifdef CONFIG_PM 1258a7d403cfSEric Bénard .pm = &mxcmci_pm_ops, 1259a7d403cfSEric Bénard #endif 12607ff747c4SMarkus Pargmann .of_match_table = mxcmci_of_match, 1261d96be879SSascha Hauer } 1262d96be879SSascha Hauer }; 1263d96be879SSascha Hauer 1264d1f81a64SAxel Lin module_platform_driver(mxcmci_driver); 1265d96be879SSascha Hauer 1266d96be879SSascha Hauer MODULE_DESCRIPTION("i.MX Multimedia Card Interface Driver"); 1267d96be879SSascha Hauer MODULE_AUTHOR("Sascha Hauer, Pengutronix"); 1268d96be879SSascha Hauer MODULE_LICENSE("GPL"); 12696eb30adfSFabio Estevam MODULE_ALIAS("platform:mxc-mmc"); 1270