drivers/mmc/host/mtk-sd.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (c) 2014-2015 MediaTek Inc.
   4  * Author: Chaotian.Jing <chaotian.jing@mediatek.com>
   5  */
   6
   7 #include <linux/module.h>
   8 #include <linux/bitops.h>
   9 #include <linux/clk.h>
  10 #include <linux/delay.h>
  11 #include <linux/dma-mapping.h>
  12 #include <linux/iopoll.h>
  13 #include <linux/ioport.h>
  14 #include <linux/irq.h>
  15 #include <linux/of_address.h>
  16 #include <linux/of_device.h>
  17 #include <linux/of_irq.h>
  18 #include <linux/of_gpio.h>
  19 #include <linux/pinctrl/consumer.h>
  20 #include <linux/platform_device.h>
  21 #include <linux/pm.h>
  22 #include <linux/pm_runtime.h>
  23 #include <linux/regulator/consumer.h>
  24 #include <linux/slab.h>
  25 #include <linux/spinlock.h>
  26 #include <linux/interrupt.h>
  27 #include <linux/reset.h>
  28
  29 #include <linux/mmc/card.h>
  30 #include <linux/mmc/core.h>
  31 #include <linux/mmc/host.h>
  32 #include <linux/mmc/mmc.h>
  33 #include <linux/mmc/sd.h>
  34 #include <linux/mmc/sdio.h>
  35 #include <linux/mmc/slot-gpio.h>
  36
  37 #include "cqhci.h"
  38
  39 #define MAX_BD_NUM          1024
  40 #define MSDC_NR_CLOCKS      3
  41
  42 /*--------------------------------------------------------------------------*/
  43 /* Common Definition                                                        */
  44 /*--------------------------------------------------------------------------*/
  45 #define MSDC_BUS_1BITS          0x0
  46 #define MSDC_BUS_4BITS          0x1
  47 #define MSDC_BUS_8BITS          0x2
  48
  49 #define MSDC_BURST_64B          0x6
  50
  51 /*--------------------------------------------------------------------------*/
  52 /* Register Offset                                                          */
  53 /*--------------------------------------------------------------------------*/
  54 #define MSDC_CFG         0x0
  55 #define MSDC_IOCON       0x04
  56 #define MSDC_PS          0x08
  57 #define MSDC_INT         0x0c
  58 #define MSDC_INTEN       0x10
  59 #define MSDC_FIFOCS      0x14
  60 #define SDC_CFG          0x30
  61 #define SDC_CMD          0x34
  62 #define SDC_ARG          0x38
  63 #define SDC_STS          0x3c
  64 #define SDC_RESP0        0x40
  65 #define SDC_RESP1        0x44
  66 #define SDC_RESP2        0x48
  67 #define SDC_RESP3        0x4c
  68 #define SDC_BLK_NUM      0x50
  69 #define SDC_ADV_CFG0     0x64
  70 #define EMMC_IOCON       0x7c
  71 #define SDC_ACMD_RESP    0x80
  72 #define DMA_SA_H4BIT     0x8c
  73 #define MSDC_DMA_SA      0x90
  74 #define MSDC_DMA_CTRL    0x98
  75 #define MSDC_DMA_CFG     0x9c
  76 #define MSDC_PATCH_BIT   0xb0
  77 #define MSDC_PATCH_BIT1  0xb4
  78 #define MSDC_PATCH_BIT2  0xb8
  79 #define MSDC_PAD_TUNE    0xec
  80 #define MSDC_PAD_TUNE0   0xf0
  81 #define PAD_DS_TUNE      0x188
  82 #define PAD_CMD_TUNE     0x18c
  83 #define EMMC51_CFG0      0x204
  84 #define EMMC50_CFG0      0x208
  85 #define EMMC50_CFG1      0x20c
  86 #define EMMC50_CFG3      0x220
  87 #define SDC_FIFO_CFG     0x228
  88 #define CQHCI_SETTING    0x7fc
  89
  90 /*--------------------------------------------------------------------------*/
  91 /* Top Pad Register Offset                                                  */
  92 /*--------------------------------------------------------------------------*/
  93 #define EMMC_TOP_CONTROL        0x00
  94 #define EMMC_TOP_CMD            0x04
  95 #define EMMC50_PAD_DS_TUNE      0x0c
  96
  97 /*--------------------------------------------------------------------------*/
  98 /* Register Mask                                                            */
  99 /*--------------------------------------------------------------------------*/
 100
 101 /* MSDC_CFG mask */
 102 #define MSDC_CFG_MODE           BIT(0)  /* RW */
 103 #define MSDC_CFG_CKPDN          BIT(1)  /* RW */
 104 #define MSDC_CFG_RST            BIT(2)  /* RW */
 105 #define MSDC_CFG_PIO            BIT(3)  /* RW */
 106 #define MSDC_CFG_CKDRVEN        BIT(4)  /* RW */
 107 #define MSDC_CFG_BV18SDT        BIT(5)  /* RW */
 108 #define MSDC_CFG_BV18PSS        BIT(6)  /* R  */
 109 #define MSDC_CFG_CKSTB          BIT(7)  /* R  */
 110 #define MSDC_CFG_CKDIV          GENMASK(15, 8)  /* RW */
 111 #define MSDC_CFG_CKMOD          GENMASK(17, 16) /* RW */
 112 #define MSDC_CFG_HS400_CK_MODE  BIT(18) /* RW */
 113 #define MSDC_CFG_HS400_CK_MODE_EXTRA  BIT(22)   /* RW */
 114 #define MSDC_CFG_CKDIV_EXTRA    GENMASK(19, 8)  /* RW */
 115 #define MSDC_CFG_CKMOD_EXTRA    GENMASK(21, 20) /* RW */
 116
 117 /* MSDC_IOCON mask */
 118 #define MSDC_IOCON_SDR104CKS    BIT(0)  /* RW */
 119 #define MSDC_IOCON_RSPL         BIT(1)  /* RW */
 120 #define MSDC_IOCON_DSPL         BIT(2)  /* RW */
 121 #define MSDC_IOCON_DDLSEL       BIT(3)  /* RW */
 122 #define MSDC_IOCON_DDR50CKD     BIT(4)  /* RW */
 123 #define MSDC_IOCON_DSPLSEL      BIT(5)  /* RW */
 124 #define MSDC_IOCON_W_DSPL       BIT(8)  /* RW */
 125 #define MSDC_IOCON_D0SPL        BIT(16) /* RW */
 126 #define MSDC_IOCON_D1SPL        BIT(17) /* RW */
 127 #define MSDC_IOCON_D2SPL        BIT(18) /* RW */
 128 #define MSDC_IOCON_D3SPL        BIT(19) /* RW */
 129 #define MSDC_IOCON_D4SPL        BIT(20) /* RW */
 130 #define MSDC_IOCON_D5SPL        BIT(21) /* RW */
 131 #define MSDC_IOCON_D6SPL        BIT(22) /* RW */
 132 #define MSDC_IOCON_D7SPL        BIT(23) /* RW */
 133 #define MSDC_IOCON_RISCSZ       GENMASK(25, 24) /* RW */
 134
 135 /* MSDC_PS mask */
 136 #define MSDC_PS_CDEN            BIT(0)  /* RW */
 137 #define MSDC_PS_CDSTS           BIT(1)  /* R  */
 138 #define MSDC_PS_CDDEBOUNCE      GENMASK(15, 12) /* RW */
 139 #define MSDC_PS_DAT             GENMASK(23, 16) /* R  */
 140 #define MSDC_PS_DATA1           BIT(17) /* R  */
 141 #define MSDC_PS_CMD             BIT(24) /* R  */
 142 #define MSDC_PS_WP              BIT(31) /* R  */
 143
 144 /* MSDC_INT mask */
 145 #define MSDC_INT_MMCIRQ         BIT(0)  /* W1C */
 146 #define MSDC_INT_CDSC           BIT(1)  /* W1C */
 147 #define MSDC_INT_ACMDRDY        BIT(3)  /* W1C */
 148 #define MSDC_INT_ACMDTMO        BIT(4)  /* W1C */
 149 #define MSDC_INT_ACMDCRCERR     BIT(5)  /* W1C */
 150 #define MSDC_INT_DMAQ_EMPTY     BIT(6)  /* W1C */
 151 #define MSDC_INT_SDIOIRQ        BIT(7)  /* W1C */
 152 #define MSDC_INT_CMDRDY         BIT(8)  /* W1C */
 153 #define MSDC_INT_CMDTMO         BIT(9)  /* W1C */
 154 #define MSDC_INT_RSPCRCERR      BIT(10) /* W1C */
 155 #define MSDC_INT_CSTA           BIT(11) /* R */
 156 #define MSDC_INT_XFER_COMPL     BIT(12) /* W1C */
 157 #define MSDC_INT_DXFER_DONE     BIT(13) /* W1C */
 158 #define MSDC_INT_DATTMO         BIT(14) /* W1C */
 159 #define MSDC_INT_DATCRCERR      BIT(15) /* W1C */
 160 #define MSDC_INT_ACMD19_DONE    BIT(16) /* W1C */
 161 #define MSDC_INT_DMA_BDCSERR    BIT(17) /* W1C */
 162 #define MSDC_INT_DMA_GPDCSERR   BIT(18) /* W1C */
 163 #define MSDC_INT_DMA_PROTECT    BIT(19) /* W1C */
 164 #define MSDC_INT_CMDQ           BIT(28) /* W1C */
 165
 166 /* MSDC_INTEN mask */
 167 #define MSDC_INTEN_MMCIRQ       BIT(0)  /* RW */
 168 #define MSDC_INTEN_CDSC         BIT(1)  /* RW */
 169 #define MSDC_INTEN_ACMDRDY      BIT(3)  /* RW */
 170 #define MSDC_INTEN_ACMDTMO      BIT(4)  /* RW */
 171 #define MSDC_INTEN_ACMDCRCERR   BIT(5)  /* RW */
 172 #define MSDC_INTEN_DMAQ_EMPTY   BIT(6)  /* RW */
 173 #define MSDC_INTEN_SDIOIRQ      BIT(7)  /* RW */
 174 #define MSDC_INTEN_CMDRDY       BIT(8)  /* RW */
 175 #define MSDC_INTEN_CMDTMO       BIT(9)  /* RW */
 176 #define MSDC_INTEN_RSPCRCERR    BIT(10) /* RW */
 177 #define MSDC_INTEN_CSTA         BIT(11) /* RW */
 178 #define MSDC_INTEN_XFER_COMPL   BIT(12) /* RW */
 179 #define MSDC_INTEN_DXFER_DONE   BIT(13) /* RW */
 180 #define MSDC_INTEN_DATTMO       BIT(14) /* RW */
 181 #define MSDC_INTEN_DATCRCERR    BIT(15) /* RW */
 182 #define MSDC_INTEN_ACMD19_DONE  BIT(16) /* RW */
 183 #define MSDC_INTEN_DMA_BDCSERR  BIT(17) /* RW */
 184 #define MSDC_INTEN_DMA_GPDCSERR BIT(18) /* RW */
 185 #define MSDC_INTEN_DMA_PROTECT  BIT(19) /* RW */
 186
 187 /* MSDC_FIFOCS mask */
 188 #define MSDC_FIFOCS_RXCNT       GENMASK(7, 0)   /* R */
 189 #define MSDC_FIFOCS_TXCNT       GENMASK(23, 16) /* R */
 190 #define MSDC_FIFOCS_CLR         BIT(31) /* RW */
 191
 192 /* SDC_CFG mask */
 193 #define SDC_CFG_SDIOINTWKUP     BIT(0)  /* RW */
 194 #define SDC_CFG_INSWKUP         BIT(1)  /* RW */
 195 #define SDC_CFG_WRDTOC          GENMASK(14, 2)  /* RW */
 196 #define SDC_CFG_BUSWIDTH        GENMASK(17, 16) /* RW */
 197 #define SDC_CFG_SDIO            BIT(19) /* RW */
 198 #define SDC_CFG_SDIOIDE         BIT(20) /* RW */
 199 #define SDC_CFG_INTATGAP        BIT(21) /* RW */
 200 #define SDC_CFG_DTOC            GENMASK(31, 24) /* RW */
 201
 202 /* SDC_STS mask */
 203 #define SDC_STS_SDCBUSY         BIT(0)  /* RW */
 204 #define SDC_STS_CMDBUSY         BIT(1)  /* RW */
 205 #define SDC_STS_SWR_COMPL       BIT(31) /* RW */
 206
 207 #define SDC_DAT1_IRQ_TRIGGER    BIT(19) /* RW */
 208 /* SDC_ADV_CFG0 mask */
 209 #define SDC_RX_ENHANCE_EN       BIT(20) /* RW */
 210
 211 /* DMA_SA_H4BIT mask */
 212 #define DMA_ADDR_HIGH_4BIT      GENMASK(3, 0)   /* RW */
 213
 214 /* MSDC_DMA_CTRL mask */
 215 #define MSDC_DMA_CTRL_START     BIT(0)  /* W */
 216 #define MSDC_DMA_CTRL_STOP      BIT(1)  /* W */
 217 #define MSDC_DMA_CTRL_RESUME    BIT(2)  /* W */
 218 #define MSDC_DMA_CTRL_MODE      BIT(8)  /* RW */
 219 #define MSDC_DMA_CTRL_LASTBUF   BIT(10) /* RW */
 220 #define MSDC_DMA_CTRL_BRUSTSZ   GENMASK(14, 12) /* RW */
 221
 222 /* MSDC_DMA_CFG mask */
 223 #define MSDC_DMA_CFG_STS        BIT(0)  /* R */
 224 #define MSDC_DMA_CFG_DECSEN     BIT(1)  /* RW */
 225 #define MSDC_DMA_CFG_AHBHPROT2  BIT(9)  /* RW */
 226 #define MSDC_DMA_CFG_ACTIVEEN   BIT(13) /* RW */
 227 #define MSDC_DMA_CFG_CS12B16B   BIT(16) /* RW */
 228
 229 /* MSDC_PATCH_BIT mask */
 230 #define MSDC_PATCH_BIT_ODDSUPP    BIT(1)        /* RW */
 231 #define MSDC_INT_DAT_LATCH_CK_SEL GENMASK(9, 7)
 232 #define MSDC_CKGEN_MSDC_DLY_SEL   GENMASK(14, 10)
 233 #define MSDC_PATCH_BIT_IODSSEL    BIT(16)       /* RW */
 234 #define MSDC_PATCH_BIT_IOINTSEL   BIT(17)       /* RW */
 235 #define MSDC_PATCH_BIT_BUSYDLY    GENMASK(21, 18)       /* RW */
 236 #define MSDC_PATCH_BIT_WDOD       GENMASK(25, 22)       /* RW */
 237 #define MSDC_PATCH_BIT_IDRTSEL    BIT(26)       /* RW */
 238 #define MSDC_PATCH_BIT_CMDFSEL    BIT(27)       /* RW */
 239 #define MSDC_PATCH_BIT_INTDLSEL   BIT(28)       /* RW */
 240 #define MSDC_PATCH_BIT_SPCPUSH    BIT(29)       /* RW */
 241 #define MSDC_PATCH_BIT_DECRCTMO   BIT(30)       /* RW */
 242
 243 #define MSDC_PATCH_BIT1_CMDTA     GENMASK(5, 3)    /* RW */
 244 #define MSDC_PB1_BUSY_CHECK_SEL   BIT(7)    /* RW */
 245 #define MSDC_PATCH_BIT1_STOP_DLY  GENMASK(11, 8)    /* RW */
 246
 247 #define MSDC_PATCH_BIT2_CFGRESP   BIT(15)   /* RW */
 248 #define MSDC_PATCH_BIT2_CFGCRCSTS BIT(28)   /* RW */
 249 #define MSDC_PB2_SUPPORT_64G      BIT(1)    /* RW */
 250 #define MSDC_PB2_RESPWAIT         GENMASK(3, 2)   /* RW */
 251 #define MSDC_PB2_RESPSTSENSEL     GENMASK(18, 16) /* RW */
 252 #define MSDC_PB2_CRCSTSENSEL      GENMASK(31, 29) /* RW */
 253
 254 #define MSDC_PAD_TUNE_DATWRDLY    GENMASK(4, 0)         /* RW */
 255 #define MSDC_PAD_TUNE_DATRRDLY    GENMASK(12, 8)        /* RW */
 256 #define MSDC_PAD_TUNE_CMDRDLY     GENMASK(20, 16)       /* RW */
 257 #define MSDC_PAD_TUNE_CMDRRDLY    GENMASK(26, 22)       /* RW */
 258 #define MSDC_PAD_TUNE_CLKTDLY     GENMASK(31, 27)       /* RW */
 259 #define MSDC_PAD_TUNE_RXDLYSEL    BIT(15)   /* RW */
 260 #define MSDC_PAD_TUNE_RD_SEL      BIT(13)   /* RW */
 261 #define MSDC_PAD_TUNE_CMD_SEL     BIT(21)   /* RW */
 262
 263 #define PAD_DS_TUNE_DLY_SEL       BIT(0)          /* RW */
 264 #define PAD_DS_TUNE_DLY1          GENMASK(6, 2)   /* RW */
 265 #define PAD_DS_TUNE_DLY2          GENMASK(11, 7)  /* RW */
 266 #define PAD_DS_TUNE_DLY3          GENMASK(16, 12) /* RW */
 267
 268 #define PAD_CMD_TUNE_RX_DLY3      GENMASK(5, 1)   /* RW */
 269
 270 /* EMMC51_CFG0 mask */
 271 #define CMDQ_RDAT_CNT             GENMASK(21, 12) /* RW */
 272
 273 #define EMMC50_CFG_PADCMD_LATCHCK BIT(0)   /* RW */
 274 #define EMMC50_CFG_CRCSTS_EDGE    BIT(3)   /* RW */
 275 #define EMMC50_CFG_CFCSTS_SEL     BIT(4)   /* RW */
 276 #define EMMC50_CFG_CMD_RESP_SEL   BIT(9)   /* RW */
 277
 278 /* EMMC50_CFG1 mask */
 279 #define EMMC50_CFG1_DS_CFG        BIT(28)  /* RW */
 280
 281 #define EMMC50_CFG3_OUTS_WR       GENMASK(4, 0)  /* RW */
 282
 283 #define SDC_FIFO_CFG_WRVALIDSEL   BIT(24)  /* RW */
 284 #define SDC_FIFO_CFG_RDVALIDSEL   BIT(25)  /* RW */
 285
 286 /* CQHCI_SETTING */
 287 #define CQHCI_RD_CMD_WND_SEL      BIT(14) /* RW */
 288 #define CQHCI_WR_CMD_WND_SEL      BIT(15) /* RW */
 289
 290 /* EMMC_TOP_CONTROL mask */
 291 #define PAD_RXDLY_SEL           BIT(0)      /* RW */
 292 #define DELAY_EN                BIT(1)      /* RW */
 293 #define PAD_DAT_RD_RXDLY2       GENMASK(6, 2)     /* RW */
 294 #define PAD_DAT_RD_RXDLY        GENMASK(11, 7)    /* RW */
 295 #define PAD_DAT_RD_RXDLY2_SEL   BIT(12)     /* RW */
 296 #define PAD_DAT_RD_RXDLY_SEL    BIT(13)     /* RW */
 297 #define DATA_K_VALUE_SEL        BIT(14)     /* RW */
 298 #define SDC_RX_ENH_EN           BIT(15)     /* TW */
 299
 300 /* EMMC_TOP_CMD mask */
 301 #define PAD_CMD_RXDLY2          GENMASK(4, 0)   /* RW */
 302 #define PAD_CMD_RXDLY           GENMASK(9, 5)   /* RW */
 303 #define PAD_CMD_RD_RXDLY2_SEL   BIT(10)         /* RW */
 304 #define PAD_CMD_RD_RXDLY_SEL    BIT(11)         /* RW */
 305 #define PAD_CMD_TX_DLY          GENMASK(16, 12) /* RW */
 306
 307 /* EMMC50_PAD_DS_TUNE mask */
 308 #define PAD_DS_DLY_SEL          BIT(16) /* RW */
 309 #define PAD_DS_DLY1             GENMASK(14, 10) /* RW */
 310 #define PAD_DS_DLY3             GENMASK(4, 0)   /* RW */
 311
 312 #define REQ_CMD_EIO  BIT(0)
 313 #define REQ_CMD_TMO  BIT(1)
 314 #define REQ_DAT_ERR  BIT(2)
 315 #define REQ_STOP_EIO BIT(3)
 316 #define REQ_STOP_TMO BIT(4)
 317 #define REQ_CMD_BUSY BIT(5)
 318
 319 #define MSDC_PREPARE_FLAG BIT(0)
 320 #define MSDC_ASYNC_FLAG BIT(1)
 321 #define MSDC_MMAP_FLAG BIT(2)
 322
 323 #define MTK_MMC_AUTOSUSPEND_DELAY       50
 324 #define CMD_TIMEOUT         (HZ/10 * 5) /* 100ms x5 */
 325 #define DAT_TIMEOUT         (HZ    * 5) /* 1000ms x5 */
 326
 327 #define DEFAULT_DEBOUNCE        (8)     /* 8 cycles CD debounce */
 328
 329 #define PAD_DELAY_MAX   32 /* PAD delay cells */
 330 /*--------------------------------------------------------------------------*/
 331 /* Descriptor Structure                                                     */
 332 /*--------------------------------------------------------------------------*/
 333 struct mt_gpdma_desc {
 334         u32 gpd_info;
 335 #define GPDMA_DESC_HWO          BIT(0)
 336 #define GPDMA_DESC_BDP          BIT(1)
 337 #define GPDMA_DESC_CHECKSUM     GENMASK(15, 8)
 338 #define GPDMA_DESC_INT          BIT(16)
 339 #define GPDMA_DESC_NEXT_H4      GENMASK(27, 24)
 340 #define GPDMA_DESC_PTR_H4       GENMASK(31, 28)
 341         u32 next;
 342         u32 ptr;
 343         u32 gpd_data_len;
 344 #define GPDMA_DESC_BUFLEN       GENMASK(15, 0)
 345 #define GPDMA_DESC_EXTLEN       GENMASK(23, 16)
 346         u32 arg;
 347         u32 blknum;
 348         u32 cmd;
 349 };
 350
 351 struct mt_bdma_desc {
 352         u32 bd_info;
 353 #define BDMA_DESC_EOL           BIT(0)
 354 #define BDMA_DESC_CHECKSUM      GENMASK(15, 8)
 355 #define BDMA_DESC_BLKPAD        BIT(17)
 356 #define BDMA_DESC_DWPAD         BIT(18)
 357 #define BDMA_DESC_NEXT_H4       GENMASK(27, 24)
 358 #define BDMA_DESC_PTR_H4        GENMASK(31, 28)
 359         u32 next;
 360         u32 ptr;
 361         u32 bd_data_len;
 362 #define BDMA_DESC_BUFLEN        GENMASK(15, 0)
 363 #define BDMA_DESC_BUFLEN_EXT    GENMASK(23, 0)
 364 };
 365
 366 struct msdc_dma {
 367         struct scatterlist *sg; /* I/O scatter list */
 368         struct mt_gpdma_desc *gpd;              /* pointer to gpd array */
 369         struct mt_bdma_desc *bd;                /* pointer to bd array */
 370         dma_addr_t gpd_addr;    /* the physical address of gpd array */
 371         dma_addr_t bd_addr;     /* the physical address of bd array */
 372 };
 373
 374 struct msdc_save_para {
 375         u32 msdc_cfg;
 376         u32 iocon;
 377         u32 sdc_cfg;
 378         u32 pad_tune;
 379         u32 patch_bit0;
 380         u32 patch_bit1;
 381         u32 patch_bit2;
 382         u32 pad_ds_tune;
 383         u32 pad_cmd_tune;
 384         u32 emmc50_cfg0;
 385         u32 emmc50_cfg3;
 386         u32 sdc_fifo_cfg;
 387         u32 emmc_top_control;
 388         u32 emmc_top_cmd;
 389         u32 emmc50_pad_ds_tune;
 390 };
 391
 392 struct mtk_mmc_compatible {
 393         u8 clk_div_bits;
 394         bool recheck_sdio_irq;
 395         bool hs400_tune; /* only used for MT8173 */
 396         u32 pad_tune_reg;
 397         bool async_fifo;
 398         bool data_tune;
 399         bool busy_check;
 400         bool stop_clk_fix;
 401         bool enhance_rx;
 402         bool support_64g;
 403         bool use_internal_cd;
 404 };
 405
 406 struct msdc_tune_para {
 407         u32 iocon;
 408         u32 pad_tune;
 409         u32 pad_cmd_tune;
 410         u32 emmc_top_control;
 411         u32 emmc_top_cmd;
 412 };
 413
 414 struct msdc_delay_phase {
 415         u8 maxlen;
 416         u8 start;
 417         u8 final_phase;
 418 };
 419
 420 struct msdc_host {
 421         struct device *dev;
 422         const struct mtk_mmc_compatible *dev_comp;
 423         int cmd_rsp;
 424
 425         spinlock_t lock;
 426         struct mmc_request *mrq;
 427         struct mmc_command *cmd;
 428         struct mmc_data *data;
 429         int error;
 430
 431         void __iomem *base;             /* host base address */
 432         void __iomem *top_base;         /* host top register base address */
 433
 434         struct msdc_dma dma;    /* dma channel */
 435         u64 dma_mask;
 436
 437         u32 timeout_ns;         /* data timeout ns */
 438         u32 timeout_clks;       /* data timeout clks */
 439
 440         struct pinctrl *pinctrl;
 441         struct pinctrl_state *pins_default;
 442         struct pinctrl_state *pins_uhs;
 443         struct delayed_work req_timeout;
 444         int irq;                /* host interrupt */
 445         struct reset_control *reset;
 446
 447         struct clk *src_clk;    /* msdc source clock */
 448         struct clk *h_clk;      /* msdc h_clk */
 449         struct clk *bus_clk;    /* bus clock which used to access register */
 450         struct clk *src_clk_cg; /* msdc source clock control gate */
 451         struct clk *sys_clk_cg; /* msdc subsys clock control gate */
 452         struct clk_bulk_data bulk_clks[MSDC_NR_CLOCKS];
 453         u32 mclk;               /* mmc subsystem clock frequency */
 454         u32 src_clk_freq;       /* source clock frequency */
 455         unsigned char timing;
 456         bool vqmmc_enabled;
 457         u32 latch_ck;
 458         u32 hs400_ds_delay;
 459         u32 hs400_ds_dly3;
 460         u32 hs200_cmd_int_delay; /* cmd internal delay for HS200/SDR104 */
 461         u32 hs400_cmd_int_delay; /* cmd internal delay for HS400 */
 462         bool hs400_cmd_resp_sel_rising;
 463                                  /* cmd response sample selection for HS400 */
 464         bool hs400_mode;        /* current eMMC will run at hs400 mode */
 465         bool hs400_tuning;      /* hs400 mode online tuning */
 466         bool internal_cd;       /* Use internal card-detect logic */
 467         bool cqhci;             /* support eMMC hw cmdq */
 468         struct msdc_save_para save_para; /* used when gate HCLK */
 469         struct msdc_tune_para def_tune_para; /* default tune setting */
 470         struct msdc_tune_para saved_tune_para; /* tune result of CMD21/CMD19 */
 471         struct cqhci_host *cq_host;
 472 };
 473
 474 static const struct mtk_mmc_compatible mt8135_compat = {
 475         .clk_div_bits = 8,
 476         .recheck_sdio_irq = true,
 477         .hs400_tune = false,
 478         .pad_tune_reg = MSDC_PAD_TUNE,
 479         .async_fifo = false,
 480         .data_tune = false,
 481         .busy_check = false,
 482         .stop_clk_fix = false,
 483         .enhance_rx = false,
 484         .support_64g = false,
 485 };
 486
 487 static const struct mtk_mmc_compatible mt8173_compat = {
 488         .clk_div_bits = 8,
 489         .recheck_sdio_irq = true,
 490         .hs400_tune = true,
 491         .pad_tune_reg = MSDC_PAD_TUNE,
 492         .async_fifo = false,
 493         .data_tune = false,
 494         .busy_check = false,
 495         .stop_clk_fix = false,
 496         .enhance_rx = false,
 497         .support_64g = false,
 498 };
 499
 500 static const struct mtk_mmc_compatible mt8183_compat = {
 501         .clk_div_bits = 12,
 502         .recheck_sdio_irq = false,
 503         .hs400_tune = false,
 504         .pad_tune_reg = MSDC_PAD_TUNE0,
 505         .async_fifo = true,
 506         .data_tune = true,
 507         .busy_check = true,
 508         .stop_clk_fix = true,
 509         .enhance_rx = true,
 510         .support_64g = true,
 511 };
 512
 513 static const struct mtk_mmc_compatible mt2701_compat = {
 514         .clk_div_bits = 12,
 515         .recheck_sdio_irq = true,
 516         .hs400_tune = false,
 517         .pad_tune_reg = MSDC_PAD_TUNE0,
 518         .async_fifo = true,
 519         .data_tune = true,
 520         .busy_check = false,
 521         .stop_clk_fix = false,
 522         .enhance_rx = false,
 523         .support_64g = false,
 524 };
 525
 526 static const struct mtk_mmc_compatible mt2712_compat = {
 527         .clk_div_bits = 12,
 528         .recheck_sdio_irq = false,
 529         .hs400_tune = false,
 530         .pad_tune_reg = MSDC_PAD_TUNE0,
 531         .async_fifo = true,
 532         .data_tune = true,
 533         .busy_check = true,
 534         .stop_clk_fix = true,
 535         .enhance_rx = true,
 536         .support_64g = true,
 537 };
 538
 539 static const struct mtk_mmc_compatible mt7622_compat = {
 540         .clk_div_bits = 12,
 541         .recheck_sdio_irq = true,
 542         .hs400_tune = false,
 543         .pad_tune_reg = MSDC_PAD_TUNE0,
 544         .async_fifo = true,
 545         .data_tune = true,
 546         .busy_check = true,
 547         .stop_clk_fix = true,
 548         .enhance_rx = true,
 549         .support_64g = false,
 550 };
 551
 552 static const struct mtk_mmc_compatible mt8516_compat = {
 553         .clk_div_bits = 12,
 554         .recheck_sdio_irq = true,
 555         .hs400_tune = false,
 556         .pad_tune_reg = MSDC_PAD_TUNE0,
 557         .async_fifo = true,
 558         .data_tune = true,
 559         .busy_check = true,
 560         .stop_clk_fix = true,
 561 };
 562
 563 static const struct mtk_mmc_compatible mt7620_compat = {
 564         .clk_div_bits = 8,
 565         .recheck_sdio_irq = true,
 566         .hs400_tune = false,
 567         .pad_tune_reg = MSDC_PAD_TUNE,
 568         .async_fifo = false,
 569         .data_tune = false,
 570         .busy_check = false,
 571         .stop_clk_fix = false,
 572         .enhance_rx = false,
 573         .use_internal_cd = true,
 574 };
 575
 576 static const struct mtk_mmc_compatible mt6779_compat = {
 577         .clk_div_bits = 12,
 578         .recheck_sdio_irq = false,
 579         .hs400_tune = false,
 580         .pad_tune_reg = MSDC_PAD_TUNE0,
 581         .async_fifo = true,
 582         .data_tune = true,
 583         .busy_check = true,
 584         .stop_clk_fix = true,
 585         .enhance_rx = true,
 586         .support_64g = true,
 587 };
 588
 589 static const struct of_device_id msdc_of_ids[] = {
 590         { .compatible = "mediatek,mt8135-mmc", .data = &mt8135_compat},
 591         { .compatible = "mediatek,mt8173-mmc", .data = &mt8173_compat},
 592         { .compatible = "mediatek,mt8183-mmc", .data = &mt8183_compat},
 593         { .compatible = "mediatek,mt2701-mmc", .data = &mt2701_compat},
 594         { .compatible = "mediatek,mt2712-mmc", .data = &mt2712_compat},
 595         { .compatible = "mediatek,mt7622-mmc", .data = &mt7622_compat},
 596         { .compatible = "mediatek,mt8516-mmc", .data = &mt8516_compat},
 597         { .compatible = "mediatek,mt7620-mmc", .data = &mt7620_compat},
 598         { .compatible = "mediatek,mt6779-mmc", .data = &mt6779_compat},
 599         {}
 600 };
 601 MODULE_DEVICE_TABLE(of, msdc_of_ids);
 602
 603 static void sdr_set_bits(void __iomem *reg, u32 bs)
 604 {
 605         u32 val = readl(reg);
 606
 607         val |= bs;
 608         writel(val, reg);
 609 }
 610
 611 static void sdr_clr_bits(void __iomem *reg, u32 bs)
 612 {
 613         u32 val = readl(reg);
 614
 615         val &= ~bs;
 616         writel(val, reg);
 617 }
 618
 619 static void sdr_set_field(void __iomem *reg, u32 field, u32 val)
 620 {
 621         unsigned int tv = readl(reg);
 622
 623         tv &= ~field;
 624         tv |= ((val) << (ffs((unsigned int)field) - 1));
 625         writel(tv, reg);
 626 }
 627
 628 static void sdr_get_field(void __iomem *reg, u32 field, u32 *val)
 629 {
 630         unsigned int tv = readl(reg);
 631
 632         *val = ((tv & field) >> (ffs((unsigned int)field) - 1));
 633 }
 634
 635 static void msdc_reset_hw(struct msdc_host *host)
 636 {
 637         u32 val;
 638
 639         sdr_set_bits(host->base + MSDC_CFG, MSDC_CFG_RST);
 640         readl_poll_timeout(host->base + MSDC_CFG, val, !(val & MSDC_CFG_RST), 0, 0);
 641
 642         sdr_set_bits(host->base + MSDC_FIFOCS, MSDC_FIFOCS_CLR);
 643         readl_poll_timeout(host->base + MSDC_FIFOCS, val,
 644                            !(val & MSDC_FIFOCS_CLR), 0, 0);
 645
 646         val = readl(host->base + MSDC_INT);
 647         writel(val, host->base + MSDC_INT);
 648 }
 649
 650 static void msdc_cmd_next(struct msdc_host *host,
 651                 struct mmc_request *mrq, struct mmc_command *cmd);
 652 static void __msdc_enable_sdio_irq(struct msdc_host *host, int enb);
 653
 654 static const u32 cmd_ints_mask = MSDC_INTEN_CMDRDY | MSDC_INTEN_RSPCRCERR |
 655                         MSDC_INTEN_CMDTMO | MSDC_INTEN_ACMDRDY |
 656                         MSDC_INTEN_ACMDCRCERR | MSDC_INTEN_ACMDTMO;
 657 static const u32 data_ints_mask = MSDC_INTEN_XFER_COMPL | MSDC_INTEN_DATTMO |
 658                         MSDC_INTEN_DATCRCERR | MSDC_INTEN_DMA_BDCSERR |
 659                         MSDC_INTEN_DMA_GPDCSERR | MSDC_INTEN_DMA_PROTECT;
 660
 661 static u8 msdc_dma_calcs(u8 *buf, u32 len)
 662 {
 663         u32 i, sum = 0;
 664
 665         for (i = 0; i < len; i++)
 666                 sum += buf[i];
 667         return 0xff - (u8) sum;
 668 }
 669
 670 static inline void msdc_dma_setup(struct msdc_host *host, struct msdc_dma *dma,
 671                 struct mmc_data *data)
 672 {
 673         unsigned int j, dma_len;
 674         dma_addr_t dma_address;
 675         u32 dma_ctrl;
 676         struct scatterlist *sg;
 677         struct mt_gpdma_desc *gpd;
 678         struct mt_bdma_desc *bd;
 679
 680         sg = data->sg;
 681
 682         gpd = dma->gpd;
 683         bd = dma->bd;
 684
 685         /* modify gpd */
 686         gpd->gpd_info |= GPDMA_DESC_HWO;
 687         gpd->gpd_info |= GPDMA_DESC_BDP;
 688         /* need to clear first. use these bits to calc checksum */
 689         gpd->gpd_info &= ~GPDMA_DESC_CHECKSUM;
 690         gpd->gpd_info |= msdc_dma_calcs((u8 *) gpd, 16) << 8;
 691
 692         /* modify bd */
 693         for_each_sg(data->sg, sg, data->sg_count, j) {
 694                 dma_address = sg_dma_address(sg);
 695                 dma_len = sg_dma_len(sg);
 696
 697                 /* init bd */
 698                 bd[j].bd_info &= ~BDMA_DESC_BLKPAD;
 699                 bd[j].bd_info &= ~BDMA_DESC_DWPAD;
 700                 bd[j].ptr = lower_32_bits(dma_address);
 701                 if (host->dev_comp->support_64g) {
 702                         bd[j].bd_info &= ~BDMA_DESC_PTR_H4;
 703                         bd[j].bd_info |= (upper_32_bits(dma_address) & 0xf)
 704                                          << 28;
 705                 }
 706
 707                 if (host->dev_comp->support_64g) {
 708                         bd[j].bd_data_len &= ~BDMA_DESC_BUFLEN_EXT;
 709                         bd[j].bd_data_len |= (dma_len & BDMA_DESC_BUFLEN_EXT);
 710                 } else {
 711                         bd[j].bd_data_len &= ~BDMA_DESC_BUFLEN;
 712                         bd[j].bd_data_len |= (dma_len & BDMA_DESC_BUFLEN);
 713                 }
 714
 715                 if (j == data->sg_count - 1) /* the last bd */
 716                         bd[j].bd_info |= BDMA_DESC_EOL;
 717                 else
 718                         bd[j].bd_info &= ~BDMA_DESC_EOL;
 719
 720                 /* checksume need to clear first */
 721                 bd[j].bd_info &= ~BDMA_DESC_CHECKSUM;
 722                 bd[j].bd_info |= msdc_dma_calcs((u8 *)(&bd[j]), 16) << 8;
 723         }
 724
 725         sdr_set_field(host->base + MSDC_DMA_CFG, MSDC_DMA_CFG_DECSEN, 1);
 726         dma_ctrl = readl_relaxed(host->base + MSDC_DMA_CTRL);
 727         dma_ctrl &= ~(MSDC_DMA_CTRL_BRUSTSZ | MSDC_DMA_CTRL_MODE);
 728         dma_ctrl |= (MSDC_BURST_64B << 12 | BIT(8));
 729         writel_relaxed(dma_ctrl, host->base + MSDC_DMA_CTRL);
 730         if (host->dev_comp->support_64g)
 731                 sdr_set_field(host->base + DMA_SA_H4BIT, DMA_ADDR_HIGH_4BIT,
 732                               upper_32_bits(dma->gpd_addr) & 0xf);
 733         writel(lower_32_bits(dma->gpd_addr), host->base + MSDC_DMA_SA);
 734 }
 735
 736 static void msdc_prepare_data(struct msdc_host *host, struct mmc_data *data)
 737 {
 738         if (!(data->host_cookie & MSDC_PREPARE_FLAG)) {
 739                 data->host_cookie |= MSDC_PREPARE_FLAG;
 740                 data->sg_count = dma_map_sg(host->dev, data->sg, data->sg_len,
 741                                             mmc_get_dma_dir(data));
 742         }
 743 }
 744
 745 static void msdc_unprepare_data(struct msdc_host *host, struct mmc_data *data)
 746 {
 747         if (data->host_cookie & MSDC_ASYNC_FLAG)
 748                 return;
 749
 750         if (data->host_cookie & MSDC_PREPARE_FLAG) {
 751                 dma_unmap_sg(host->dev, data->sg, data->sg_len,
 752                              mmc_get_dma_dir(data));
 753                 data->host_cookie &= ~MSDC_PREPARE_FLAG;
 754         }
 755 }
 756
 757 static u64 msdc_timeout_cal(struct msdc_host *host, u64 ns, u64 clks)
 758 {
 759         struct mmc_host *mmc = mmc_from_priv(host);
 760         u64 timeout, clk_ns;
 761         u32 mode = 0;
 762
 763         if (mmc->actual_clock == 0) {
 764                 timeout = 0;
 765         } else {
 766                 clk_ns  = 1000000000ULL;
 767                 do_div(clk_ns, mmc->actual_clock);
 768                 timeout = ns + clk_ns - 1;
 769                 do_div(timeout, clk_ns);
 770                 timeout += clks;
 771                 /* in 1048576 sclk cycle unit */
 772                 timeout = DIV_ROUND_UP(timeout, BIT(20));
 773                 if (host->dev_comp->clk_div_bits == 8)
 774                         sdr_get_field(host->base + MSDC_CFG,
 775                                       MSDC_CFG_CKMOD, &mode);
 776                 else
 777                         sdr_get_field(host->base + MSDC_CFG,
 778                                       MSDC_CFG_CKMOD_EXTRA, &mode);
 779                 /*DDR mode will double the clk cycles for data timeout */
 780                 timeout = mode >= 2 ? timeout * 2 : timeout;
 781                 timeout = timeout > 1 ? timeout - 1 : 0;
 782         }
 783         return timeout;
 784 }
 785
 786 /* clock control primitives */
 787 static void msdc_set_timeout(struct msdc_host *host, u64 ns, u64 clks)
 788 {
 789         u64 timeout;
 790
 791         host->timeout_ns = ns;
 792         host->timeout_clks = clks;
 793
 794         timeout = msdc_timeout_cal(host, ns, clks);
 795         sdr_set_field(host->base + SDC_CFG, SDC_CFG_DTOC,
 796                       (u32)(timeout > 255 ? 255 : timeout));
 797 }
 798
 799 static void msdc_set_busy_timeout(struct msdc_host *host, u64 ns, u64 clks)
 800 {
 801         u64 timeout;
 802
 803         timeout = msdc_timeout_cal(host, ns, clks);
 804         sdr_set_field(host->base + SDC_CFG, SDC_CFG_WRDTOC,
 805                       (u32)(timeout > 8191 ? 8191 : timeout));
 806 }
 807
 808 static void msdc_gate_clock(struct msdc_host *host)
 809 {
 810         clk_bulk_disable_unprepare(MSDC_NR_CLOCKS, host->bulk_clks);
 811         clk_disable_unprepare(host->src_clk_cg);
 812         clk_disable_unprepare(host->src_clk);
 813         clk_disable_unprepare(host->bus_clk);
 814         clk_disable_unprepare(host->h_clk);
 815 }
 816
 817 static int msdc_ungate_clock(struct msdc_host *host)
 818 {
 819         u32 val;
 820         int ret;
 821
 822         clk_prepare_enable(host->h_clk);
 823         clk_prepare_enable(host->bus_clk);
 824         clk_prepare_enable(host->src_clk);
 825         clk_prepare_enable(host->src_clk_cg);
 826         ret = clk_bulk_prepare_enable(MSDC_NR_CLOCKS, host->bulk_clks);
 827         if (ret) {
 828                 dev_err(host->dev, "Cannot enable pclk/axi/ahb clock gates\n");
 829                 return ret;
 830         }
 831
 832         return readl_poll_timeout(host->base + MSDC_CFG, val,
 833                                   (val & MSDC_CFG_CKSTB), 1, 20000);
 834 }
 835
 836 static void msdc_set_mclk(struct msdc_host *host, unsigned char timing, u32 hz)
 837 {
 838         struct mmc_host *mmc = mmc_from_priv(host);
 839         u32 mode;
 840         u32 flags;
 841         u32 div;
 842         u32 sclk;
 843         u32 tune_reg = host->dev_comp->pad_tune_reg;
 844         u32 val;
 845
 846         if (!hz) {
 847                 dev_dbg(host->dev, "set mclk to 0\n");
 848                 host->mclk = 0;
 849                 mmc->actual_clock = 0;
 850                 sdr_clr_bits(host->base + MSDC_CFG, MSDC_CFG_CKPDN);
 851                 return;
 852         }
 853
 854         flags = readl(host->base + MSDC_INTEN);
 855         sdr_clr_bits(host->base + MSDC_INTEN, flags);
 856         if (host->dev_comp->clk_div_bits == 8)
 857                 sdr_clr_bits(host->base + MSDC_CFG, MSDC_CFG_HS400_CK_MODE);
 858         else
 859                 sdr_clr_bits(host->base + MSDC_CFG,
 860                              MSDC_CFG_HS400_CK_MODE_EXTRA);
 861         if (timing == MMC_TIMING_UHS_DDR50 ||
 862             timing == MMC_TIMING_MMC_DDR52 ||
 863             timing == MMC_TIMING_MMC_HS400) {
 864                 if (timing == MMC_TIMING_MMC_HS400)
 865                         mode = 0x3;
 866                 else
 867                         mode = 0x2; /* ddr mode and use divisor */
 868
 869                 if (hz >= (host->src_clk_freq >> 2)) {
 870                         div = 0; /* mean div = 1/4 */
 871                         sclk = host->src_clk_freq >> 2; /* sclk = clk / 4 */
 872                 } else {
 873                         div = (host->src_clk_freq + ((hz << 2) - 1)) / (hz << 2);
 874                         sclk = (host->src_clk_freq >> 2) / div;
 875                         div = (div >> 1);
 876                 }
 877
 878                 if (timing == MMC_TIMING_MMC_HS400 &&
 879                     hz >= (host->src_clk_freq >> 1)) {
 880                         if (host->dev_comp->clk_div_bits == 8)
 881                                 sdr_set_bits(host->base + MSDC_CFG,
 882                                              MSDC_CFG_HS400_CK_MODE);
 883                         else
 884                                 sdr_set_bits(host->base + MSDC_CFG,
 885                                              MSDC_CFG_HS400_CK_MODE_EXTRA);
 886                         sclk = host->src_clk_freq >> 1;
 887                         div = 0; /* div is ignore when bit18 is set */
 888                 }
 889         } else if (hz >= host->src_clk_freq) {
 890                 mode = 0x1; /* no divisor */
 891                 div = 0;
 892                 sclk = host->src_clk_freq;
 893         } else {
 894                 mode = 0x0; /* use divisor */
 895                 if (hz >= (host->src_clk_freq >> 1)) {
 896                         div = 0; /* mean div = 1/2 */
 897                         sclk = host->src_clk_freq >> 1; /* sclk = clk / 2 */
 898                 } else {
 899                         div = (host->src_clk_freq + ((hz << 2) - 1)) / (hz << 2);
 900                         sclk = (host->src_clk_freq >> 2) / div;
 901                 }
 902         }
 903         sdr_clr_bits(host->base + MSDC_CFG, MSDC_CFG_CKPDN);
 904
 905         clk_disable_unprepare(host->src_clk_cg);
 906         if (host->dev_comp->clk_div_bits == 8)
 907                 sdr_set_field(host->base + MSDC_CFG,
 908                               MSDC_CFG_CKMOD | MSDC_CFG_CKDIV,
 909                               (mode << 8) | div);
 910         else
 911                 sdr_set_field(host->base + MSDC_CFG,
 912                               MSDC_CFG_CKMOD_EXTRA | MSDC_CFG_CKDIV_EXTRA,
 913                               (mode << 12) | div);
 914
 915         clk_prepare_enable(host->src_clk_cg);
 916         readl_poll_timeout(host->base + MSDC_CFG, val, (val & MSDC_CFG_CKSTB), 0, 0);
 917         sdr_set_bits(host->base + MSDC_CFG, MSDC_CFG_CKPDN);
 918         mmc->actual_clock = sclk;
 919         host->mclk = hz;
 920         host->timing = timing;
 921         /* need because clk changed. */
 922         msdc_set_timeout(host, host->timeout_ns, host->timeout_clks);
 923         sdr_set_bits(host->base + MSDC_INTEN, flags);
 924
 925         /*
 926          * mmc_select_hs400() will drop to 50Mhz and High speed mode,
 927          * tune result of hs200/200Mhz is not suitable for 50Mhz
 928          */
 929         if (mmc->actual_clock <= 52000000) {
 930                 writel(host->def_tune_para.iocon, host->base + MSDC_IOCON);
 931                 if (host->top_base) {
 932                         writel(host->def_tune_para.emmc_top_control,
 933                                host->top_base + EMMC_TOP_CONTROL);
 934                         writel(host->def_tune_para.emmc_top_cmd,
 935                                host->top_base + EMMC_TOP_CMD);
 936                 } else {
 937                         writel(host->def_tune_para.pad_tune,
 938                                host->base + tune_reg);
 939                 }
 940         } else {
 941                 writel(host->saved_tune_para.iocon, host->base + MSDC_IOCON);
 942                 writel(host->saved_tune_para.pad_cmd_tune,
 943                        host->base + PAD_CMD_TUNE);
 944                 if (host->top_base) {
 945                         writel(host->saved_tune_para.emmc_top_control,
 946                                host->top_base + EMMC_TOP_CONTROL);
 947                         writel(host->saved_tune_para.emmc_top_cmd,
 948                                host->top_base + EMMC_TOP_CMD);
 949                 } else {
 950                         writel(host->saved_tune_para.pad_tune,
 951                                host->base + tune_reg);
 952                 }
 953         }
 954
 955         if (timing == MMC_TIMING_MMC_HS400 &&
 956             host->dev_comp->hs400_tune)
 957                 sdr_set_field(host->base + tune_reg,
 958                               MSDC_PAD_TUNE_CMDRRDLY,
 959                               host->hs400_cmd_int_delay);
 960         dev_dbg(host->dev, "sclk: %d, timing: %d\n", mmc->actual_clock,
 961                 timing);
 962 }
 963
 964 static inline u32 msdc_cmd_find_resp(struct msdc_host *host,
 965                 struct mmc_command *cmd)
 966 {
 967         u32 resp;
 968
 969         switch (mmc_resp_type(cmd)) {
 970                 /* Actually, R1, R5, R6, R7 are the same */
 971         case MMC_RSP_R1:
 972                 resp = 0x1;
 973                 break;
 974         case MMC_RSP_R1B:
 975                 resp = 0x7;
 976                 break;
 977         case MMC_RSP_R2:
 978                 resp = 0x2;
 979                 break;
 980         case MMC_RSP_R3:
 981                 resp = 0x3;
 982                 break;
 983         case MMC_RSP_NONE:
 984         default:
 985                 resp = 0x0;
 986                 break;
 987         }
 988
 989         return resp;
 990 }
 991
 992 static inline u32 msdc_cmd_prepare_raw_cmd(struct msdc_host *host,
 993                 struct mmc_request *mrq, struct mmc_command *cmd)
 994 {
 995         struct mmc_host *mmc = mmc_from_priv(host);
 996         /* rawcmd :
 997          * vol_swt << 30 | auto_cmd << 28 | blklen << 16 | go_irq << 15 |
 998          * stop << 14 | rw << 13 | dtype << 11 | rsptyp << 7 | brk << 6 | opcode
 999          */
1000         u32 opcode = cmd->opcode;
1001         u32 resp = msdc_cmd_find_resp(host, cmd);
1002         u32 rawcmd = (opcode & 0x3f) | ((resp & 0x7) << 7);
1003
1004         host->cmd_rsp = resp;
1005
1006         if ((opcode == SD_IO_RW_DIRECT && cmd->flags == (unsigned int) -1) ||
1007             opcode == MMC_STOP_TRANSMISSION)
1008                 rawcmd |= BIT(14);
1009         else if (opcode == SD_SWITCH_VOLTAGE)
1010                 rawcmd |= BIT(30);
1011         else if (opcode == SD_APP_SEND_SCR ||
1012                  opcode == SD_APP_SEND_NUM_WR_BLKS ||
1013                  (opcode == SD_SWITCH && mmc_cmd_type(cmd) == MMC_CMD_ADTC) ||
1014                  (opcode == SD_APP_SD_STATUS && mmc_cmd_type(cmd) == MMC_CMD_ADTC) ||
1015                  (opcode == MMC_SEND_EXT_CSD && mmc_cmd_type(cmd) == MMC_CMD_ADTC))
1016                 rawcmd |= BIT(11);
1017
1018         if (cmd->data) {
1019                 struct mmc_data *data = cmd->data;
1020
1021                 if (mmc_op_multi(opcode)) {
1022                         if (mmc_card_mmc(mmc->card) && mrq->sbc &&
1023                             !(mrq->sbc->arg & 0xFFFF0000))
1024                                 rawcmd |= BIT(29); /* AutoCMD23 */
1025                 }
1026
1027                 rawcmd |= ((data->blksz & 0xFFF) << 16);
1028                 if (data->flags & MMC_DATA_WRITE)
1029                         rawcmd |= BIT(13);
1030                 if (data->blocks > 1)
1031                         rawcmd |= BIT(12);
1032                 else
1033                         rawcmd |= BIT(11);
1034                 /* Always use dma mode */
1035                 sdr_clr_bits(host->base + MSDC_CFG, MSDC_CFG_PIO);
1036
1037                 if (host->timeout_ns != data->timeout_ns ||
1038                     host->timeout_clks != data->timeout_clks)
1039                         msdc_set_timeout(host, data->timeout_ns,
1040                                         data->timeout_clks);
1041
1042                 writel(data->blocks, host->base + SDC_BLK_NUM);
1043         }
1044         return rawcmd;
1045 }
1046
1047 static void msdc_start_data(struct msdc_host *host, struct mmc_command *cmd,
1048                 struct mmc_data *data)
1049 {
1050         bool read;
1051
1052         WARN_ON(host->data);
1053         host->data = data;
1054         read = data->flags & MMC_DATA_READ;
1055
1056         mod_delayed_work(system_wq, &host->req_timeout, DAT_TIMEOUT);
1057         msdc_dma_setup(host, &host->dma, data);
1058         sdr_set_bits(host->base + MSDC_INTEN, data_ints_mask);
1059         sdr_set_field(host->base + MSDC_DMA_CTRL, MSDC_DMA_CTRL_START, 1);
1060         dev_dbg(host->dev, "DMA start\n");
1061         dev_dbg(host->dev, "%s: cmd=%d DMA data: %d blocks; read=%d\n",
1062                         __func__, cmd->opcode, data->blocks, read);
1063 }
1064
1065 static int msdc_auto_cmd_done(struct msdc_host *host, int events,
1066                 struct mmc_command *cmd)
1067 {
1068         u32 *rsp = cmd->resp;
1069
1070         rsp[0] = readl(host->base + SDC_ACMD_RESP);
1071
1072         if (events & MSDC_INT_ACMDRDY) {
1073                 cmd->error = 0;
1074         } else {
1075                 msdc_reset_hw(host);
1076                 if (events & MSDC_INT_ACMDCRCERR) {
1077                         cmd->error = -EILSEQ;
1078                         host->error |= REQ_STOP_EIO;
1079                 } else if (events & MSDC_INT_ACMDTMO) {
1080                         cmd->error = -ETIMEDOUT;
1081                         host->error |= REQ_STOP_TMO;
1082                 }
1083                 dev_err(host->dev,
1084                         "%s: AUTO_CMD%d arg=%08X; rsp %08X; cmd_error=%d\n",
1085                         __func__, cmd->opcode, cmd->arg, rsp[0], cmd->error);
1086         }
1087         return cmd->error;
1088 }
1089
1090 /*
1091  * msdc_recheck_sdio_irq - recheck whether the SDIO irq is lost
1092  *
1093  * Host controller may lost interrupt in some special case.
1094  * Add SDIO irq recheck mechanism to make sure all interrupts
1095  * can be processed immediately
1096  */
1097 static void msdc_recheck_sdio_irq(struct msdc_host *host)
1098 {
1099         struct mmc_host *mmc = mmc_from_priv(host);
1100         u32 reg_int, reg_inten, reg_ps;
1101
1102         if (mmc->caps & MMC_CAP_SDIO_IRQ) {
1103                 reg_inten = readl(host->base + MSDC_INTEN);
1104                 if (reg_inten & MSDC_INTEN_SDIOIRQ) {
1105                         reg_int = readl(host->base + MSDC_INT);
1106                         reg_ps = readl(host->base + MSDC_PS);
1107                         if (!(reg_int & MSDC_INT_SDIOIRQ ||
1108                               reg_ps & MSDC_PS_DATA1)) {
1109                                 __msdc_enable_sdio_irq(host, 0);
1110                                 sdio_signal_irq(mmc);
1111                         }
1112                 }
1113         }
1114 }
1115
1116 static void msdc_track_cmd_data(struct msdc_host *host, struct mmc_command *cmd)
1117 {
1118         if (host->error)
1119                 dev_dbg(host->dev, "%s: cmd=%d arg=%08X; host->error=0x%08X\n",
1120                         __func__, cmd->opcode, cmd->arg, host->error);
1121 }
1122
1123 static void msdc_request_done(struct msdc_host *host, struct mmc_request *mrq)
1124 {
1125         unsigned long flags;
1126
1127         /*
1128          * No need check the return value of cancel_delayed_work, as only ONE
1129          * path will go here!
1130          */
1131         cancel_delayed_work(&host->req_timeout);
1132
1133         spin_lock_irqsave(&host->lock, flags);
1134         host->mrq = NULL;
1135         spin_unlock_irqrestore(&host->lock, flags);
1136
1137         msdc_track_cmd_data(host, mrq->cmd);
1138         if (mrq->data)
1139                 msdc_unprepare_data(host, mrq->data);
1140         if (host->error)
1141                 msdc_reset_hw(host);
1142         mmc_request_done(mmc_from_priv(host), mrq);
1143         if (host->dev_comp->recheck_sdio_irq)
1144                 msdc_recheck_sdio_irq(host);
1145 }
1146
1147 /* returns true if command is fully handled; returns false otherwise */
1148 static bool msdc_cmd_done(struct msdc_host *host, int events,
1149                           struct mmc_request *mrq, struct mmc_command *cmd)
1150 {
1151         bool done = false;
1152         bool sbc_error;
1153         unsigned long flags;
1154         u32 *rsp;
1155
1156         if (mrq->sbc && cmd == mrq->cmd &&
1157             (events & (MSDC_INT_ACMDRDY | MSDC_INT_ACMDCRCERR
1158                                    | MSDC_INT_ACMDTMO)))
1159                 msdc_auto_cmd_done(host, events, mrq->sbc);
1160
1161         sbc_error = mrq->sbc && mrq->sbc->error;
1162
1163         if (!sbc_error && !(events & (MSDC_INT_CMDRDY
1164                                         | MSDC_INT_RSPCRCERR
1165                                         | MSDC_INT_CMDTMO)))
1166                 return done;
1167
1168         spin_lock_irqsave(&host->lock, flags);
1169         done = !host->cmd;
1170         host->cmd = NULL;
1171         spin_unlock_irqrestore(&host->lock, flags);
1172
1173         if (done)
1174                 return true;
1175         rsp = cmd->resp;
1176
1177         sdr_clr_bits(host->base + MSDC_INTEN, cmd_ints_mask);
1178
1179         if (cmd->flags & MMC_RSP_PRESENT) {
1180                 if (cmd->flags & MMC_RSP_136) {
1181                         rsp[0] = readl(host->base + SDC_RESP3);
1182                         rsp[1] = readl(host->base + SDC_RESP2);
1183                         rsp[2] = readl(host->base + SDC_RESP1);
1184                         rsp[3] = readl(host->base + SDC_RESP0);
1185                 } else {
1186                         rsp[0] = readl(host->base + SDC_RESP0);
1187                 }
1188         }
1189
1190         if (!sbc_error && !(events & MSDC_INT_CMDRDY)) {
1191                 if (events & MSDC_INT_CMDTMO ||
1192                     (cmd->opcode != MMC_SEND_TUNING_BLOCK &&
1193                      cmd->opcode != MMC_SEND_TUNING_BLOCK_HS200 &&
1194                      !host->hs400_tuning))
1195                         /*
1196                          * should not clear fifo/interrupt as the tune data
1197                          * may have alreay come when cmd19/cmd21 gets response
1198                          * CRC error.
1199                          */
1200                         msdc_reset_hw(host);
1201                 if (events & MSDC_INT_RSPCRCERR) {
1202                         cmd->error = -EILSEQ;
1203                         host->error |= REQ_CMD_EIO;
1204                 } else if (events & MSDC_INT_CMDTMO) {
1205                         cmd->error = -ETIMEDOUT;
1206                         host->error |= REQ_CMD_TMO;
1207                 }
1208         }
1209         if (cmd->error)
1210                 dev_dbg(host->dev,
1211                                 "%s: cmd=%d arg=%08X; rsp %08X; cmd_error=%d\n",
1212                                 __func__, cmd->opcode, cmd->arg, rsp[0],
1213                                 cmd->error);
1214
1215         msdc_cmd_next(host, mrq, cmd);
1216         return true;
1217 }
1218
1219 /* It is the core layer's responsibility to ensure card status
1220  * is correct before issue a request. but host design do below
1221  * checks recommended.
1222  */
1223 static inline bool msdc_cmd_is_ready(struct msdc_host *host,
1224                 struct mmc_request *mrq, struct mmc_command *cmd)
1225 {
1226         u32 val;
1227         int ret;
1228
1229         /* The max busy time we can endure is 20ms */
1230         ret = readl_poll_timeout_atomic(host->base + SDC_STS, val,
1231                                         !(val & SDC_STS_CMDBUSY), 1, 20000);
1232         if (ret) {
1233                 dev_err(host->dev, "CMD bus busy detected\n");
1234                 host->error |= REQ_CMD_BUSY;
1235                 msdc_cmd_done(host, MSDC_INT_CMDTMO, mrq, cmd);
1236                 return false;
1237         }
1238
1239         if (mmc_resp_type(cmd) == MMC_RSP_R1B || cmd->data) {
1240                 /* R1B or with data, should check SDCBUSY */
1241                 ret = readl_poll_timeout_atomic(host->base + SDC_STS, val,
1242                                                 !(val & SDC_STS_SDCBUSY), 1, 20000);
1243                 if (ret) {
1244                         dev_err(host->dev, "Controller busy detected\n");
1245                         host->error |= REQ_CMD_BUSY;
1246                         msdc_cmd_done(host, MSDC_INT_CMDTMO, mrq, cmd);
1247                         return false;
1248                 }
1249         }
1250         return true;
1251 }
1252
1253 static void msdc_start_command(struct msdc_host *host,
1254                 struct mmc_request *mrq, struct mmc_command *cmd)
1255 {
1256         u32 rawcmd;
1257         unsigned long flags;
1258
1259         WARN_ON(host->cmd);
1260         host->cmd = cmd;
1261
1262         mod_delayed_work(system_wq, &host->req_timeout, DAT_TIMEOUT);
1263         if (!msdc_cmd_is_ready(host, mrq, cmd))
1264                 return;
1265
1266         if ((readl(host->base + MSDC_FIFOCS) & MSDC_FIFOCS_TXCNT) >> 16 ||
1267             readl(host->base + MSDC_FIFOCS) & MSDC_FIFOCS_RXCNT) {
1268                 dev_err(host->dev, "TX/RX FIFO non-empty before start of IO. Reset\n");
1269                 msdc_reset_hw(host);
1270         }
1271
1272         cmd->error = 0;
1273         rawcmd = msdc_cmd_prepare_raw_cmd(host, mrq, cmd);
1274
1275         spin_lock_irqsave(&host->lock, flags);
1276         sdr_set_bits(host->base + MSDC_INTEN, cmd_ints_mask);
1277         spin_unlock_irqrestore(&host->lock, flags);
1278
1279         writel(cmd->arg, host->base + SDC_ARG);
1280         writel(rawcmd, host->base + SDC_CMD);
1281 }
1282
1283 static void msdc_cmd_next(struct msdc_host *host,
1284                 struct mmc_request *mrq, struct mmc_command *cmd)
1285 {
1286         if ((cmd->error &&
1287             !(cmd->error == -EILSEQ &&
1288               (cmd->opcode == MMC_SEND_TUNING_BLOCK ||
1289                cmd->opcode == MMC_SEND_TUNING_BLOCK_HS200 ||
1290                host->hs400_tuning))) ||
1291             (mrq->sbc && mrq->sbc->error))
1292                 msdc_request_done(host, mrq);
1293         else if (cmd == mrq->sbc)
1294                 msdc_start_command(host, mrq, mrq->cmd);
1295         else if (!cmd->data)
1296                 msdc_request_done(host, mrq);
1297         else
1298                 msdc_start_data(host, cmd, cmd->data);
1299 }
1300
1301 static void msdc_ops_request(struct mmc_host *mmc, struct mmc_request *mrq)
1302 {
1303         struct msdc_host *host = mmc_priv(mmc);
1304
1305         host->error = 0;
1306         WARN_ON(host->mrq);
1307         host->mrq = mrq;
1308
1309         if (mrq->data)
1310                 msdc_prepare_data(host, mrq->data);
1311
1312         /* if SBC is required, we have HW option and SW option.
1313          * if HW option is enabled, and SBC does not have "special" flags,
1314          * use HW option,  otherwise use SW option
1315          */
1316         if (mrq->sbc && (!mmc_card_mmc(mmc->card) ||
1317             (mrq->sbc->arg & 0xFFFF0000)))
1318                 msdc_start_command(host, mrq, mrq->sbc);
1319         else
1320                 msdc_start_command(host, mrq, mrq->cmd);
1321 }
1322
1323 static void msdc_pre_req(struct mmc_host *mmc, struct mmc_request *mrq)
1324 {
1325         struct msdc_host *host = mmc_priv(mmc);
1326         struct mmc_data *data = mrq->data;
1327
1328         if (!data)
1329                 return;
1330
1331         msdc_prepare_data(host, data);
1332         data->host_cookie |= MSDC_ASYNC_FLAG;
1333 }
1334
1335 static void msdc_post_req(struct mmc_host *mmc, struct mmc_request *mrq,
1336                 int err)
1337 {
1338         struct msdc_host *host = mmc_priv(mmc);
1339         struct mmc_data *data = mrq->data;
1340
1341         if (!data)
1342                 return;
1343
1344         if (data->host_cookie) {
1345                 data->host_cookie &= ~MSDC_ASYNC_FLAG;
1346                 msdc_unprepare_data(host, data);
1347         }
1348 }
1349
1350 static void msdc_data_xfer_next(struct msdc_host *host, struct mmc_request *mrq)
1351 {
1352         if (mmc_op_multi(mrq->cmd->opcode) && mrq->stop && !mrq->stop->error &&
1353             !mrq->sbc)
1354                 msdc_start_command(host, mrq, mrq->stop);
1355         else
1356                 msdc_request_done(host, mrq);
1357 }
1358
1359 static void msdc_data_xfer_done(struct msdc_host *host, u32 events,
1360                                 struct mmc_request *mrq, struct mmc_data *data)
1361 {
1362         struct mmc_command *stop;
1363         unsigned long flags;
1364         bool done;
1365         unsigned int check_data = events &
1366             (MSDC_INT_XFER_COMPL | MSDC_INT_DATCRCERR | MSDC_INT_DATTMO
1367              | MSDC_INT_DMA_BDCSERR | MSDC_INT_DMA_GPDCSERR
1368              | MSDC_INT_DMA_PROTECT);
1369         u32 val;
1370         int ret;
1371
1372         spin_lock_irqsave(&host->lock, flags);
1373         done = !host->data;
1374         if (check_data)
1375                 host->data = NULL;
1376         spin_unlock_irqrestore(&host->lock, flags);
1377
1378         if (done)
1379                 return;
1380         stop = data->stop;
1381
1382         if (check_data || (stop && stop->error)) {
1383                 dev_dbg(host->dev, "DMA status: 0x%8X\n",
1384                                 readl(host->base + MSDC_DMA_CFG));
1385                 sdr_set_field(host->base + MSDC_DMA_CTRL, MSDC_DMA_CTRL_STOP,
1386                                 1);
1387
1388                 ret = readl_poll_timeout_atomic(host->base + MSDC_DMA_CTRL, val,
1389                                                 !(val & MSDC_DMA_CTRL_STOP), 1, 20000);
1390                 if (ret)
1391                         dev_dbg(host->dev, "DMA stop timed out\n");
1392
1393                 ret = readl_poll_timeout_atomic(host->base + MSDC_DMA_CFG, val,
1394                                                 !(val & MSDC_DMA_CFG_STS), 1, 20000);
1395                 if (ret)
1396                         dev_dbg(host->dev, "DMA inactive timed out\n");
1397
1398                 sdr_clr_bits(host->base + MSDC_INTEN, data_ints_mask);
1399                 dev_dbg(host->dev, "DMA stop\n");
1400
1401                 if ((events & MSDC_INT_XFER_COMPL) && (!stop || !stop->error)) {
1402                         data->bytes_xfered = data->blocks * data->blksz;
1403                 } else {
1404                         dev_dbg(host->dev, "interrupt events: %x\n", events);
1405                         msdc_reset_hw(host);
1406                         host->error |= REQ_DAT_ERR;
1407                         data->bytes_xfered = 0;
1408
1409                         if (events & MSDC_INT_DATTMO)
1410                                 data->error = -ETIMEDOUT;
1411                         else if (events & MSDC_INT_DATCRCERR)
1412                                 data->error = -EILSEQ;
1413
1414                         dev_dbg(host->dev, "%s: cmd=%d; blocks=%d",
1415                                 __func__, mrq->cmd->opcode, data->blocks);
1416                         dev_dbg(host->dev, "data_error=%d xfer_size=%d\n",
1417                                 (int)data->error, data->bytes_xfered);
1418                 }
1419
1420                 msdc_data_xfer_next(host, mrq);
1421         }
1422 }
1423
1424 static void msdc_set_buswidth(struct msdc_host *host, u32 width)
1425 {
1426         u32 val = readl(host->base + SDC_CFG);
1427
1428         val &= ~SDC_CFG_BUSWIDTH;
1429
1430         switch (width) {
1431         default:
1432         case MMC_BUS_WIDTH_1:
1433                 val |= (MSDC_BUS_1BITS << 16);
1434                 break;
1435         case MMC_BUS_WIDTH_4:
1436                 val |= (MSDC_BUS_4BITS << 16);
1437                 break;
1438         case MMC_BUS_WIDTH_8:
1439                 val |= (MSDC_BUS_8BITS << 16);
1440                 break;
1441         }
1442
1443         writel(val, host->base + SDC_CFG);
1444         dev_dbg(host->dev, "Bus Width = %d", width);
1445 }
1446
1447 static int msdc_ops_switch_volt(struct mmc_host *mmc, struct mmc_ios *ios)
1448 {
1449         struct msdc_host *host = mmc_priv(mmc);
1450         int ret;
1451
1452         if (!IS_ERR(mmc->supply.vqmmc)) {
1453                 if (ios->signal_voltage != MMC_SIGNAL_VOLTAGE_330 &&
1454                     ios->signal_voltage != MMC_SIGNAL_VOLTAGE_180) {
1455                         dev_err(host->dev, "Unsupported signal voltage!\n");
1456                         return -EINVAL;
1457                 }
1458
1459                 ret = mmc_regulator_set_vqmmc(mmc, ios);
1460                 if (ret < 0) {
1461                         dev_dbg(host->dev, "Regulator set error %d (%d)\n",
1462                                 ret, ios->signal_voltage);
1463                         return ret;
1464                 }
1465
1466                 /* Apply different pinctrl settings for different signal voltage */
1467                 if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_180)
1468                         pinctrl_select_state(host->pinctrl, host->pins_uhs);
1469                 else
1470                         pinctrl_select_state(host->pinctrl, host->pins_default);
1471         }
1472         return 0;
1473 }
1474
1475 static int msdc_card_busy(struct mmc_host *mmc)
1476 {
1477         struct msdc_host *host = mmc_priv(mmc);
1478         u32 status = readl(host->base + MSDC_PS);
1479
1480         /* only check if data0 is low */
1481         return !(status & BIT(16));
1482 }
1483
1484 static void msdc_request_timeout(struct work_struct *work)
1485 {
1486         struct msdc_host *host = container_of(work, struct msdc_host,
1487                         req_timeout.work);
1488
1489         /* simulate HW timeout status */
1490         dev_err(host->dev, "%s: aborting cmd/data/mrq\n", __func__);
1491         if (host->mrq) {
1492                 dev_err(host->dev, "%s: aborting mrq=%p cmd=%d\n", __func__,
1493                                 host->mrq, host->mrq->cmd->opcode);
1494                 if (host->cmd) {
1495                         dev_err(host->dev, "%s: aborting cmd=%d\n",
1496                                         __func__, host->cmd->opcode);
1497                         msdc_cmd_done(host, MSDC_INT_CMDTMO, host->mrq,
1498                                         host->cmd);
1499                 } else if (host->data) {
1500                         dev_err(host->dev, "%s: abort data: cmd%d; %d blocks\n",
1501                                         __func__, host->mrq->cmd->opcode,
1502                                         host->data->blocks);
1503                         msdc_data_xfer_done(host, MSDC_INT_DATTMO, host->mrq,
1504                                         host->data);
1505                 }
1506         }
1507 }
1508
1509 static void __msdc_enable_sdio_irq(struct msdc_host *host, int enb)
1510 {
1511         if (enb) {
1512                 sdr_set_bits(host->base + MSDC_INTEN, MSDC_INTEN_SDIOIRQ);
1513                 sdr_set_bits(host->base + SDC_CFG, SDC_CFG_SDIOIDE);
1514                 if (host->dev_comp->recheck_sdio_irq)
1515                         msdc_recheck_sdio_irq(host);
1516         } else {
1517                 sdr_clr_bits(host->base + MSDC_INTEN, MSDC_INTEN_SDIOIRQ);
1518                 sdr_clr_bits(host->base + SDC_CFG, SDC_CFG_SDIOIDE);
1519         }
1520 }
1521
1522 static void msdc_enable_sdio_irq(struct mmc_host *mmc, int enb)
1523 {
1524         unsigned long flags;
1525         struct msdc_host *host = mmc_priv(mmc);
1526
1527         spin_lock_irqsave(&host->lock, flags);
1528         __msdc_enable_sdio_irq(host, enb);
1529         spin_unlock_irqrestore(&host->lock, flags);
1530
1531         if (enb)
1532                 pm_runtime_get_noresume(host->dev);
1533         else
1534                 pm_runtime_put_noidle(host->dev);
1535 }
1536
1537 static irqreturn_t msdc_cmdq_irq(struct msdc_host *host, u32 intsts)
1538 {
1539         struct mmc_host *mmc = mmc_from_priv(host);
1540         int cmd_err = 0, dat_err = 0;
1541
1542         if (intsts & MSDC_INT_RSPCRCERR) {
1543                 cmd_err = -EILSEQ;
1544                 dev_err(host->dev, "%s: CMD CRC ERR", __func__);
1545         } else if (intsts & MSDC_INT_CMDTMO) {
1546                 cmd_err = -ETIMEDOUT;
1547                 dev_err(host->dev, "%s: CMD TIMEOUT ERR", __func__);
1548         }
1549
1550         if (intsts & MSDC_INT_DATCRCERR) {
1551                 dat_err = -EILSEQ;
1552                 dev_err(host->dev, "%s: DATA CRC ERR", __func__);
1553         } else if (intsts & MSDC_INT_DATTMO) {
1554                 dat_err = -ETIMEDOUT;
1555                 dev_err(host->dev, "%s: DATA TIMEOUT ERR", __func__);
1556         }
1557
1558         if (cmd_err || dat_err) {
1559                 dev_err(host->dev, "cmd_err = %d, dat_err =%d, intsts = 0x%x",
1560                         cmd_err, dat_err, intsts);
1561         }
1562
1563         return cqhci_irq(mmc, 0, cmd_err, dat_err);
1564 }
1565
1566 static irqreturn_t msdc_irq(int irq, void *dev_id)
1567 {
1568         struct msdc_host *host = (struct msdc_host *) dev_id;
1569         struct mmc_host *mmc = mmc_from_priv(host);
1570
1571         while (true) {
1572                 struct mmc_request *mrq;
1573                 struct mmc_command *cmd;
1574                 struct mmc_data *data;
1575                 u32 events, event_mask;
1576
1577                 spin_lock(&host->lock);
1578                 events = readl(host->base + MSDC_INT);
1579                 event_mask = readl(host->base + MSDC_INTEN);
1580                 if ((events & event_mask) & MSDC_INT_SDIOIRQ)
1581                         __msdc_enable_sdio_irq(host, 0);
1582                 /* clear interrupts */
1583                 writel(events & event_mask, host->base + MSDC_INT);
1584
1585                 mrq = host->mrq;
1586                 cmd = host->cmd;
1587                 data = host->data;
1588                 spin_unlock(&host->lock);
1589
1590                 if ((events & event_mask) & MSDC_INT_SDIOIRQ)
1591                         sdio_signal_irq(mmc);
1592
1593                 if ((events & event_mask) & MSDC_INT_CDSC) {
1594                         if (host->internal_cd)
1595                                 mmc_detect_change(mmc, msecs_to_jiffies(20));
1596                         events &= ~MSDC_INT_CDSC;
1597                 }
1598
1599                 if (!(events & (event_mask & ~MSDC_INT_SDIOIRQ)))
1600                         break;
1601
1602                 if ((mmc->caps2 & MMC_CAP2_CQE) &&
1603                     (events & MSDC_INT_CMDQ)) {
1604                         msdc_cmdq_irq(host, events);
1605                         /* clear interrupts */
1606                         writel(events, host->base + MSDC_INT);
1607                         return IRQ_HANDLED;
1608                 }
1609
1610                 if (!mrq) {
1611                         dev_err(host->dev,
1612                                 "%s: MRQ=NULL; events=%08X; event_mask=%08X\n",
1613                                 __func__, events, event_mask);
1614                         WARN_ON(1);
1615                         break;
1616                 }
1617
1618                 dev_dbg(host->dev, "%s: events=%08X\n", __func__, events);
1619
1620                 if (cmd)
1621                         msdc_cmd_done(host, events, mrq, cmd);
1622                 else if (data)
1623                         msdc_data_xfer_done(host, events, mrq, data);
1624         }
1625
1626         return IRQ_HANDLED;
1627 }
1628
1629 static void msdc_init_hw(struct msdc_host *host)
1630 {
1631         u32 val;
1632         u32 tune_reg = host->dev_comp->pad_tune_reg;
1633         struct mmc_host *mmc = mmc_from_priv(host);
1634
1635         if (host->reset) {
1636                 reset_control_assert(host->reset);
1637                 usleep_range(10, 50);
1638                 reset_control_deassert(host->reset);
1639         }
1640
1641         /* Configure to MMC/SD mode, clock free running */
1642         sdr_set_bits(host->base + MSDC_CFG, MSDC_CFG_MODE | MSDC_CFG_CKPDN);
1643
1644         /* Reset */
1645         msdc_reset_hw(host);
1646
1647         /* Disable and clear all interrupts */
1648         writel(0, host->base + MSDC_INTEN);
1649         val = readl(host->base + MSDC_INT);
1650         writel(val, host->base + MSDC_INT);
1651
1652         /* Configure card detection */
1653         if (host->internal_cd) {
1654                 sdr_set_field(host->base + MSDC_PS, MSDC_PS_CDDEBOUNCE,
1655                               DEFAULT_DEBOUNCE);
1656                 sdr_set_bits(host->base + MSDC_PS, MSDC_PS_CDEN);
1657                 sdr_set_bits(host->base + MSDC_INTEN, MSDC_INTEN_CDSC);
1658                 sdr_set_bits(host->base + SDC_CFG, SDC_CFG_INSWKUP);
1659         } else {
1660                 sdr_clr_bits(host->base + SDC_CFG, SDC_CFG_INSWKUP);
1661                 sdr_clr_bits(host->base + MSDC_PS, MSDC_PS_CDEN);
1662                 sdr_clr_bits(host->base + MSDC_INTEN, MSDC_INTEN_CDSC);
1663         }
1664
1665         if (host->top_base) {
1666                 writel(0, host->top_base + EMMC_TOP_CONTROL);
1667                 writel(0, host->top_base + EMMC_TOP_CMD);
1668         } else {
1669                 writel(0, host->base + tune_reg);
1670         }
1671         writel(0, host->base + MSDC_IOCON);
1672         sdr_set_field(host->base + MSDC_IOCON, MSDC_IOCON_DDLSEL, 0);
1673         writel(0x403c0046, host->base + MSDC_PATCH_BIT);
1674         sdr_set_field(host->base + MSDC_PATCH_BIT, MSDC_CKGEN_MSDC_DLY_SEL, 1);
1675         writel(0xffff4089, host->base + MSDC_PATCH_BIT1);
1676         sdr_set_bits(host->base + EMMC50_CFG0, EMMC50_CFG_CFCSTS_SEL);
1677
1678         if (host->dev_comp->stop_clk_fix) {
1679                 sdr_set_field(host->base + MSDC_PATCH_BIT1,
1680                               MSDC_PATCH_BIT1_STOP_DLY, 3);
1681                 sdr_clr_bits(host->base + SDC_FIFO_CFG,
1682                              SDC_FIFO_CFG_WRVALIDSEL);
1683                 sdr_clr_bits(host->base + SDC_FIFO_CFG,
1684                              SDC_FIFO_CFG_RDVALIDSEL);
1685         }
1686
1687         if (host->dev_comp->busy_check)
1688                 sdr_clr_bits(host->base + MSDC_PATCH_BIT1, BIT(7));
1689
1690         if (host->dev_comp->async_fifo) {
1691                 sdr_set_field(host->base + MSDC_PATCH_BIT2,
1692                               MSDC_PB2_RESPWAIT, 3);
1693                 if (host->dev_comp->enhance_rx) {
1694                         if (host->top_base)
1695                                 sdr_set_bits(host->top_base + EMMC_TOP_CONTROL,
1696                                              SDC_RX_ENH_EN);
1697                         else
1698                                 sdr_set_bits(host->base + SDC_ADV_CFG0,
1699                                              SDC_RX_ENHANCE_EN);
1700                 } else {
1701                         sdr_set_field(host->base + MSDC_PATCH_BIT2,
1702                                       MSDC_PB2_RESPSTSENSEL, 2);
1703                         sdr_set_field(host->base + MSDC_PATCH_BIT2,
1704                                       MSDC_PB2_CRCSTSENSEL, 2);
1705                 }
1706                 /* use async fifo, then no need tune internal delay */
1707                 sdr_clr_bits(host->base + MSDC_PATCH_BIT2,
1708                              MSDC_PATCH_BIT2_CFGRESP);
1709                 sdr_set_bits(host->base + MSDC_PATCH_BIT2,
1710                              MSDC_PATCH_BIT2_CFGCRCSTS);
1711         }
1712
1713         if (host->dev_comp->support_64g)
1714                 sdr_set_bits(host->base + MSDC_PATCH_BIT2,
1715                              MSDC_PB2_SUPPORT_64G);
1716         if (host->dev_comp->data_tune) {
1717                 if (host->top_base) {
1718                         sdr_set_bits(host->top_base + EMMC_TOP_CONTROL,
1719                                      PAD_DAT_RD_RXDLY_SEL);
1720                         sdr_clr_bits(host->top_base + EMMC_TOP_CONTROL,
1721                                      DATA_K_VALUE_SEL);
1722                         sdr_set_bits(host->top_base + EMMC_TOP_CMD,
1723                                      PAD_CMD_RD_RXDLY_SEL);
1724                 } else {
1725                         sdr_set_bits(host->base + tune_reg,
1726                                      MSDC_PAD_TUNE_RD_SEL |
1727                                      MSDC_PAD_TUNE_CMD_SEL);
1728                 }
1729         } else {
1730                 /* choose clock tune */
1731                 if (host->top_base)
1732                         sdr_set_bits(host->top_base + EMMC_TOP_CONTROL,
1733                                      PAD_RXDLY_SEL);
1734                 else
1735                         sdr_set_bits(host->base + tune_reg,
1736                                      MSDC_PAD_TUNE_RXDLYSEL);
1737         }
1738
1739         if (mmc->caps2 & MMC_CAP2_NO_SDIO) {
1740                 sdr_clr_bits(host->base + SDC_CFG, SDC_CFG_SDIO);
1741                 sdr_clr_bits(host->base + MSDC_INTEN, MSDC_INTEN_SDIOIRQ);
1742                 sdr_clr_bits(host->base + SDC_ADV_CFG0, SDC_DAT1_IRQ_TRIGGER);
1743         } else {
1744                 /* Configure to enable SDIO mode, otherwise SDIO CMD5 fails */
1745                 sdr_set_bits(host->base + SDC_CFG, SDC_CFG_SDIO);
1746
1747                 /* Config SDIO device detect interrupt function */
1748                 sdr_clr_bits(host->base + SDC_CFG, SDC_CFG_SDIOIDE);
1749                 sdr_set_bits(host->base + SDC_ADV_CFG0, SDC_DAT1_IRQ_TRIGGER);
1750         }
1751
1752         /* Configure to default data timeout */
1753         sdr_set_field(host->base + SDC_CFG, SDC_CFG_DTOC, 3);
1754
1755         host->def_tune_para.iocon = readl(host->base + MSDC_IOCON);
1756         host->saved_tune_para.iocon = readl(host->base + MSDC_IOCON);
1757         if (host->top_base) {
1758                 host->def_tune_para.emmc_top_control =
1759                         readl(host->top_base + EMMC_TOP_CONTROL);
1760                 host->def_tune_para.emmc_top_cmd =
1761                         readl(host->top_base + EMMC_TOP_CMD);
1762                 host->saved_tune_para.emmc_top_control =
1763                         readl(host->top_base + EMMC_TOP_CONTROL);
1764                 host->saved_tune_para.emmc_top_cmd =
1765                         readl(host->top_base + EMMC_TOP_CMD);
1766         } else {
1767                 host->def_tune_para.pad_tune = readl(host->base + tune_reg);
1768                 host->saved_tune_para.pad_tune = readl(host->base + tune_reg);
1769         }
1770         dev_dbg(host->dev, "init hardware done!");
1771 }
1772
1773 static void msdc_deinit_hw(struct msdc_host *host)
1774 {
1775         u32 val;
1776
1777         if (host->internal_cd) {
1778                 /* Disabled card-detect */
1779                 sdr_clr_bits(host->base + MSDC_PS, MSDC_PS_CDEN);
1780                 sdr_clr_bits(host->base + SDC_CFG, SDC_CFG_INSWKUP);
1781         }
1782
1783         /* Disable and clear all interrupts */
1784         writel(0, host->base + MSDC_INTEN);
1785
1786         val = readl(host->base + MSDC_INT);
1787         writel(val, host->base + MSDC_INT);
1788 }
1789
1790 /* init gpd and bd list in msdc_drv_probe */
1791 static void msdc_init_gpd_bd(struct msdc_host *host, struct msdc_dma *dma)
1792 {
1793         struct mt_gpdma_desc *gpd = dma->gpd;
1794         struct mt_bdma_desc *bd = dma->bd;
1795         dma_addr_t dma_addr;
1796         int i;
1797
1798         memset(gpd, 0, sizeof(struct mt_gpdma_desc) * 2);
1799
1800         dma_addr = dma->gpd_addr + sizeof(struct mt_gpdma_desc);
1801         gpd->gpd_info = GPDMA_DESC_BDP; /* hwo, cs, bd pointer */
1802         /* gpd->next is must set for desc DMA
1803          * That's why must alloc 2 gpd structure.
1804          */
1805         gpd->next = lower_32_bits(dma_addr);
1806         if (host->dev_comp->support_64g)
1807                 gpd->gpd_info |= (upper_32_bits(dma_addr) & 0xf) << 24;
1808
1809         dma_addr = dma->bd_addr;
1810         gpd->ptr = lower_32_bits(dma->bd_addr); /* physical address */
1811         if (host->dev_comp->support_64g)
1812                 gpd->gpd_info |= (upper_32_bits(dma_addr) & 0xf) << 28;
1813
1814         memset(bd, 0, sizeof(struct mt_bdma_desc) * MAX_BD_NUM);
1815         for (i = 0; i < (MAX_BD_NUM - 1); i++) {
1816                 dma_addr = dma->bd_addr + sizeof(*bd) * (i + 1);
1817                 bd[i].next = lower_32_bits(dma_addr);
1818                 if (host->dev_comp->support_64g)
1819                         bd[i].bd_info |= (upper_32_bits(dma_addr) & 0xf) << 24;
1820         }
1821 }
1822
1823 static void msdc_ops_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
1824 {
1825         struct msdc_host *host = mmc_priv(mmc);
1826         int ret;
1827
1828         msdc_set_buswidth(host, ios->bus_width);
1829
1830         /* Suspend/Resume will do power off/on */
1831         switch (ios->power_mode) {
1832         case MMC_POWER_UP:
1833                 if (!IS_ERR(mmc->supply.vmmc)) {
1834                         msdc_init_hw(host);
1835                         ret = mmc_regulator_set_ocr(mmc, mmc->supply.vmmc,
1836                                         ios->vdd);
1837                         if (ret) {
1838                                 dev_err(host->dev, "Failed to set vmmc power!\n");
1839                                 return;
1840                         }
1841                 }
1842                 break;
1843         case MMC_POWER_ON:
1844                 if (!IS_ERR(mmc->supply.vqmmc) && !host->vqmmc_enabled) {
1845                         ret = regulator_enable(mmc->supply.vqmmc);
1846                         if (ret)
1847                                 dev_err(host->dev, "Failed to set vqmmc power!\n");
1848                         else
1849                                 host->vqmmc_enabled = true;
1850                 }
1851                 break;
1852         case MMC_POWER_OFF:
1853                 if (!IS_ERR(mmc->supply.vmmc))
1854                         mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, 0);
1855
1856                 if (!IS_ERR(mmc->supply.vqmmc) && host->vqmmc_enabled) {
1857                         regulator_disable(mmc->supply.vqmmc);
1858                         host->vqmmc_enabled = false;
1859                 }
1860                 break;
1861         default:
1862                 break;
1863         }
1864
1865         if (host->mclk != ios->clock || host->timing != ios->timing)
1866                 msdc_set_mclk(host, ios->timing, ios->clock);
1867 }
1868
1869 static u32 test_delay_bit(u32 delay, u32 bit)
1870 {
1871         bit %= PAD_DELAY_MAX;
1872         return delay & BIT(bit);
1873 }
1874
1875 static int get_delay_len(u32 delay, u32 start_bit)
1876 {
1877         int i;
1878
1879         for (i = 0; i < (PAD_DELAY_MAX - start_bit); i++) {
1880                 if (test_delay_bit(delay, start_bit + i) == 0)
1881                         return i;
1882         }
1883         return PAD_DELAY_MAX - start_bit;
1884 }
1885
1886 static struct msdc_delay_phase get_best_delay(struct msdc_host *host, u32 delay)
1887 {
1888         int start = 0, len = 0;
1889         int start_final = 0, len_final = 0;
1890         u8 final_phase = 0xff;
1891         struct msdc_delay_phase delay_phase = { 0, };
1892
1893         if (delay == 0) {
1894                 dev_err(host->dev, "phase error: [map:%x]\n", delay);
1895                 delay_phase.final_phase = final_phase;
1896                 return delay_phase;
1897         }
1898
1899         while (start < PAD_DELAY_MAX) {
1900                 len = get_delay_len(delay, start);
1901                 if (len_final < len) {
1902                         start_final = start;
1903                         len_final = len;
1904                 }
1905                 start += len ? len : 1;
1906                 if (len >= 12 && start_final < 4)
1907                         break;
1908         }
1909
1910         /* The rule is that to find the smallest delay cell */
1911         if (start_final == 0)
1912                 final_phase = (start_final + len_final / 3) % PAD_DELAY_MAX;
1913         else
1914                 final_phase = (start_final + len_final / 2) % PAD_DELAY_MAX;
1915         dev_dbg(host->dev, "phase: [map:%x] [maxlen:%d] [final:%d]\n",
1916                 delay, len_final, final_phase);
1917
1918         delay_phase.maxlen = len_final;
1919         delay_phase.start = start_final;
1920         delay_phase.final_phase = final_phase;
1921         return delay_phase;
1922 }
1923
1924 static inline void msdc_set_cmd_delay(struct msdc_host *host, u32 value)
1925 {
1926         u32 tune_reg = host->dev_comp->pad_tune_reg;
1927
1928         if (host->top_base)
1929                 sdr_set_field(host->top_base + EMMC_TOP_CMD, PAD_CMD_RXDLY,
1930                               value);
1931         else
1932                 sdr_set_field(host->base + tune_reg, MSDC_PAD_TUNE_CMDRDLY,
1933                               value);
1934 }
1935
1936 static inline void msdc_set_data_delay(struct msdc_host *host, u32 value)
1937 {
1938         u32 tune_reg = host->dev_comp->pad_tune_reg;
1939
1940         if (host->top_base)
1941                 sdr_set_field(host->top_base + EMMC_TOP_CONTROL,
1942                               PAD_DAT_RD_RXDLY, value);
1943         else
1944                 sdr_set_field(host->base + tune_reg, MSDC_PAD_TUNE_DATRRDLY,
1945                               value);
1946 }
1947
1948 static int msdc_tune_response(struct mmc_host *mmc, u32 opcode)
1949 {
1950         struct msdc_host *host = mmc_priv(mmc);
1951         u32 rise_delay = 0, fall_delay = 0;
1952         struct msdc_delay_phase final_rise_delay, final_fall_delay = { 0,};
1953         struct msdc_delay_phase internal_delay_phase;
1954         u8 final_delay, final_maxlen;
1955         u32 internal_delay = 0;
1956         u32 tune_reg = host->dev_comp->pad_tune_reg;
1957         int cmd_err;
1958         int i, j;
1959
1960         if (mmc->ios.timing == MMC_TIMING_MMC_HS200 ||
1961             mmc->ios.timing == MMC_TIMING_UHS_SDR104)
1962                 sdr_set_field(host->base + tune_reg,
1963                               MSDC_PAD_TUNE_CMDRRDLY,
1964                               host->hs200_cmd_int_delay);
1965
1966         sdr_clr_bits(host->base + MSDC_IOCON, MSDC_IOCON_RSPL);
1967         for (i = 0 ; i < PAD_DELAY_MAX; i++) {
1968                 msdc_set_cmd_delay(host, i);
1969                 /*
1970                  * Using the same parameters, it may sometimes pass the test,
1971                  * but sometimes it may fail. To make sure the parameters are
1972                  * more stable, we test each set of parameters 3 times.
1973                  */
1974                 for (j = 0; j < 3; j++) {
1975                         mmc_send_tuning(mmc, opcode, &cmd_err);
1976                         if (!cmd_err) {
1977                                 rise_delay |= BIT(i);
1978                         } else {
1979                                 rise_delay &= ~BIT(i);
1980                                 break;
1981                         }
1982                 }
1983         }
1984         final_rise_delay = get_best_delay(host, rise_delay);
1985         /* if rising edge has enough margin, then do not scan falling edge */
1986         if (final_rise_delay.maxlen >= 12 ||
1987             (final_rise_delay.start == 0 && final_rise_delay.maxlen >= 4))
1988                 goto skip_fall;
1989
1990         sdr_set_bits(host->base + MSDC_IOCON, MSDC_IOCON_RSPL);
1991         for (i = 0; i < PAD_DELAY_MAX; i++) {
1992                 msdc_set_cmd_delay(host, i);
1993                 /*
1994                  * Using the same parameters, it may sometimes pass the test,
1995                  * but sometimes it may fail. To make sure the parameters are
1996                  * more stable, we test each set of parameters 3 times.
1997                  */
1998                 for (j = 0; j < 3; j++) {
1999                         mmc_send_tuning(mmc, opcode, &cmd_err);
2000                         if (!cmd_err) {
2001                                 fall_delay |= BIT(i);
2002                         } else {
2003                                 fall_delay &= ~BIT(i);
2004                                 break;
2005                         }
2006                 }
2007         }
2008         final_fall_delay = get_best_delay(host, fall_delay);
2009
2010 skip_fall:
2011         final_maxlen = max(final_rise_delay.maxlen, final_fall_delay.maxlen);
2012         if (final_fall_delay.maxlen >= 12 && final_fall_delay.start < 4)
2013                 final_maxlen = final_fall_delay.maxlen;
2014         if (final_maxlen == final_rise_delay.maxlen) {
2015                 sdr_clr_bits(host->base + MSDC_IOCON, MSDC_IOCON_RSPL);
2016                 final_delay = final_rise_delay.final_phase;
2017         } else {
2018                 sdr_set_bits(host->base + MSDC_IOCON, MSDC_IOCON_RSPL);
2019                 final_delay = final_fall_delay.final_phase;
2020         }
2021         msdc_set_cmd_delay(host, final_delay);
2022
2023         if (host->dev_comp->async_fifo || host->hs200_cmd_int_delay)
2024                 goto skip_internal;
2025
2026         for (i = 0; i < PAD_DELAY_MAX; i++) {
2027                 sdr_set_field(host->base + tune_reg,
2028                               MSDC_PAD_TUNE_CMDRRDLY, i);
2029                 mmc_send_tuning(mmc, opcode, &cmd_err);
2030                 if (!cmd_err)
2031                         internal_delay |= BIT(i);
2032         }
2033         dev_dbg(host->dev, "Final internal delay: 0x%x\n", internal_delay);
2034         internal_delay_phase = get_best_delay(host, internal_delay);
2035         sdr_set_field(host->base + tune_reg, MSDC_PAD_TUNE_CMDRRDLY,
2036                       internal_delay_phase.final_phase);
2037 skip_internal:
2038         dev_dbg(host->dev, "Final cmd pad delay: %x\n", final_delay);
2039         return final_delay == 0xff ? -EIO : 0;
2040 }
2041
2042 static int hs400_tune_response(struct mmc_host *mmc, u32 opcode)
2043 {
2044         struct msdc_host *host = mmc_priv(mmc);
2045         u32 cmd_delay = 0;
2046         struct msdc_delay_phase final_cmd_delay = { 0,};
2047         u8 final_delay;
2048         int cmd_err;
2049         int i, j;
2050
2051         /* select EMMC50 PAD CMD tune */
2052         sdr_set_bits(host->base + PAD_CMD_TUNE, BIT(0));
2053         sdr_set_field(host->base + MSDC_PATCH_BIT1, MSDC_PATCH_BIT1_CMDTA, 2);
2054
2055         if (mmc->ios.timing == MMC_TIMING_MMC_HS200 ||
2056             mmc->ios.timing == MMC_TIMING_UHS_SDR104)
2057                 sdr_set_field(host->base + MSDC_PAD_TUNE,
2058                               MSDC_PAD_TUNE_CMDRRDLY,
2059                               host->hs200_cmd_int_delay);
2060
2061         if (host->hs400_cmd_resp_sel_rising)
2062                 sdr_clr_bits(host->base + MSDC_IOCON, MSDC_IOCON_RSPL);
2063         else
2064                 sdr_set_bits(host->base + MSDC_IOCON, MSDC_IOCON_RSPL);
2065         for (i = 0 ; i < PAD_DELAY_MAX; i++) {
2066                 sdr_set_field(host->base + PAD_CMD_TUNE,
2067                               PAD_CMD_TUNE_RX_DLY3, i);
2068                 /*
2069                  * Using the same parameters, it may sometimes pass the test,
2070                  * but sometimes it may fail. To make sure the parameters are
2071                  * more stable, we test each set of parameters 3 times.
2072                  */
2073                 for (j = 0; j < 3; j++) {
2074                         mmc_send_tuning(mmc, opcode, &cmd_err);
2075                         if (!cmd_err) {
2076                                 cmd_delay |= BIT(i);
2077                         } else {
2078                                 cmd_delay &= ~BIT(i);
2079                                 break;
2080                         }
2081                 }
2082         }
2083         final_cmd_delay = get_best_delay(host, cmd_delay);
2084         sdr_set_field(host->base + PAD_CMD_TUNE, PAD_CMD_TUNE_RX_DLY3,
2085                       final_cmd_delay.final_phase);
2086         final_delay = final_cmd_delay.final_phase;
2087
2088         dev_dbg(host->dev, "Final cmd pad delay: %x\n", final_delay);
2089         return final_delay == 0xff ? -EIO : 0;
2090 }
2091
2092 static int msdc_tune_data(struct mmc_host *mmc, u32 opcode)
2093 {
2094         struct msdc_host *host = mmc_priv(mmc);
2095         u32 rise_delay = 0, fall_delay = 0;
2096         struct msdc_delay_phase final_rise_delay, final_fall_delay = { 0,};
2097         u8 final_delay, final_maxlen;
2098         int i, ret;
2099
2100         sdr_set_field(host->base + MSDC_PATCH_BIT, MSDC_INT_DAT_LATCH_CK_SEL,
2101                       host->latch_ck);
2102         sdr_clr_bits(host->base + MSDC_IOCON, MSDC_IOCON_DSPL);
2103         sdr_clr_bits(host->base + MSDC_IOCON, MSDC_IOCON_W_DSPL);
2104         for (i = 0 ; i < PAD_DELAY_MAX; i++) {
2105                 msdc_set_data_delay(host, i);
2106                 ret = mmc_send_tuning(mmc, opcode, NULL);
2107                 if (!ret)
2108                         rise_delay |= BIT(i);
2109         }
2110         final_rise_delay = get_best_delay(host, rise_delay);
2111         /* if rising edge has enough margin, then do not scan falling edge */
2112         if (final_rise_delay.maxlen >= 12 ||
2113             (final_rise_delay.start == 0 && final_rise_delay.maxlen >= 4))
2114                 goto skip_fall;
2115
2116         sdr_set_bits(host->base + MSDC_IOCON, MSDC_IOCON_DSPL);
2117         sdr_set_bits(host->base + MSDC_IOCON, MSDC_IOCON_W_DSPL);
2118         for (i = 0; i < PAD_DELAY_MAX; i++) {
2119                 msdc_set_data_delay(host, i);
2120                 ret = mmc_send_tuning(mmc, opcode, NULL);
2121                 if (!ret)
2122                         fall_delay |= BIT(i);
2123         }
2124         final_fall_delay = get_best_delay(host, fall_delay);
2125
2126 skip_fall:
2127         final_maxlen = max(final_rise_delay.maxlen, final_fall_delay.maxlen);
2128         if (final_maxlen == final_rise_delay.maxlen) {
2129                 sdr_clr_bits(host->base + MSDC_IOCON, MSDC_IOCON_DSPL);
2130                 sdr_clr_bits(host->base + MSDC_IOCON, MSDC_IOCON_W_DSPL);
2131                 final_delay = final_rise_delay.final_phase;
2132         } else {
2133                 sdr_set_bits(host->base + MSDC_IOCON, MSDC_IOCON_DSPL);
2134                 sdr_set_bits(host->base + MSDC_IOCON, MSDC_IOCON_W_DSPL);
2135                 final_delay = final_fall_delay.final_phase;
2136         }
2137         msdc_set_data_delay(host, final_delay);
2138
2139         dev_dbg(host->dev, "Final data pad delay: %x\n", final_delay);
2140         return final_delay == 0xff ? -EIO : 0;
2141 }
2142
2143 /*
2144  * MSDC IP which supports data tune + async fifo can do CMD/DAT tune
2145  * together, which can save the tuning time.
2146  */
2147 static int msdc_tune_together(struct mmc_host *mmc, u32 opcode)
2148 {
2149         struct msdc_host *host = mmc_priv(mmc);
2150         u32 rise_delay = 0, fall_delay = 0;
2151         struct msdc_delay_phase final_rise_delay, final_fall_delay = { 0,};
2152         u8 final_delay, final_maxlen;
2153         int i, ret;
2154
2155         sdr_set_field(host->base + MSDC_PATCH_BIT, MSDC_INT_DAT_LATCH_CK_SEL,
2156                       host->latch_ck);
2157
2158         sdr_clr_bits(host->base + MSDC_IOCON, MSDC_IOCON_RSPL);
2159         sdr_clr_bits(host->base + MSDC_IOCON,
2160                      MSDC_IOCON_DSPL | MSDC_IOCON_W_DSPL);
2161         for (i = 0 ; i < PAD_DELAY_MAX; i++) {
2162                 msdc_set_cmd_delay(host, i);
2163                 msdc_set_data_delay(host, i);
2164                 ret = mmc_send_tuning(mmc, opcode, NULL);
2165                 if (!ret)
2166                         rise_delay |= BIT(i);
2167         }
2168         final_rise_delay = get_best_delay(host, rise_delay);
2169         /* if rising edge has enough margin, then do not scan falling edge */
2170         if (final_rise_delay.maxlen >= 12 ||
2171             (final_rise_delay.start == 0 && final_rise_delay.maxlen >= 4))
2172                 goto skip_fall;
2173
2174         sdr_set_bits(host->base + MSDC_IOCON, MSDC_IOCON_RSPL);
2175         sdr_set_bits(host->base + MSDC_IOCON,
2176                      MSDC_IOCON_DSPL | MSDC_IOCON_W_DSPL);
2177         for (i = 0; i < PAD_DELAY_MAX; i++) {
2178                 msdc_set_cmd_delay(host, i);
2179                 msdc_set_data_delay(host, i);
2180                 ret = mmc_send_tuning(mmc, opcode, NULL);
2181                 if (!ret)
2182                         fall_delay |= BIT(i);
2183         }
2184         final_fall_delay = get_best_delay(host, fall_delay);
2185
2186 skip_fall:
2187         final_maxlen = max(final_rise_delay.maxlen, final_fall_delay.maxlen);
2188         if (final_maxlen == final_rise_delay.maxlen) {
2189                 sdr_clr_bits(host->base + MSDC_IOCON, MSDC_IOCON_RSPL);
2190                 sdr_clr_bits(host->base + MSDC_IOCON,
2191                              MSDC_IOCON_DSPL | MSDC_IOCON_W_DSPL);
2192                 final_delay = final_rise_delay.final_phase;
2193         } else {
2194                 sdr_set_bits(host->base + MSDC_IOCON, MSDC_IOCON_RSPL);
2195                 sdr_set_bits(host->base + MSDC_IOCON,
2196                              MSDC_IOCON_DSPL | MSDC_IOCON_W_DSPL);
2197                 final_delay = final_fall_delay.final_phase;
2198         }
2199
2200         msdc_set_cmd_delay(host, final_delay);
2201         msdc_set_data_delay(host, final_delay);
2202
2203         dev_dbg(host->dev, "Final pad delay: %x\n", final_delay);
2204         return final_delay == 0xff ? -EIO : 0;
2205 }
2206
2207 static int msdc_execute_tuning(struct mmc_host *mmc, u32 opcode)
2208 {
2209         struct msdc_host *host = mmc_priv(mmc);
2210         int ret;
2211         u32 tune_reg = host->dev_comp->pad_tune_reg;
2212
2213         if (host->dev_comp->data_tune && host->dev_comp->async_fifo) {
2214                 ret = msdc_tune_together(mmc, opcode);
2215                 if (host->hs400_mode) {
2216                         sdr_clr_bits(host->base + MSDC_IOCON,
2217                                      MSDC_IOCON_DSPL | MSDC_IOCON_W_DSPL);
2218                         msdc_set_data_delay(host, 0);
2219                 }
2220                 goto tune_done;
2221         }
2222         if (host->hs400_mode &&
2223             host->dev_comp->hs400_tune)
2224                 ret = hs400_tune_response(mmc, opcode);
2225         else
2226                 ret = msdc_tune_response(mmc, opcode);
2227         if (ret == -EIO) {
2228                 dev_err(host->dev, "Tune response fail!\n");
2229                 return ret;
2230         }
2231         if (host->hs400_mode == false) {
2232                 ret = msdc_tune_data(mmc, opcode);
2233                 if (ret == -EIO)
2234                         dev_err(host->dev, "Tune data fail!\n");
2235         }
2236
2237 tune_done:
2238         host->saved_tune_para.iocon = readl(host->base + MSDC_IOCON);
2239         host->saved_tune_para.pad_tune = readl(host->base + tune_reg);
2240         host->saved_tune_para.pad_cmd_tune = readl(host->base + PAD_CMD_TUNE);
2241         if (host->top_base) {
2242                 host->saved_tune_para.emmc_top_control = readl(host->top_base +
2243                                 EMMC_TOP_CONTROL);
2244                 host->saved_tune_para.emmc_top_cmd = readl(host->top_base +
2245                                 EMMC_TOP_CMD);
2246         }
2247         return ret;
2248 }
2249
2250 static int msdc_prepare_hs400_tuning(struct mmc_host *mmc, struct mmc_ios *ios)
2251 {
2252         struct msdc_host *host = mmc_priv(mmc);
2253         host->hs400_mode = true;
2254
2255         if (host->top_base)
2256                 writel(host->hs400_ds_delay,
2257                        host->top_base + EMMC50_PAD_DS_TUNE);
2258         else
2259                 writel(host->hs400_ds_delay, host->base + PAD_DS_TUNE);
2260         /* hs400 mode must set it to 0 */
2261         sdr_clr_bits(host->base + MSDC_PATCH_BIT2, MSDC_PATCH_BIT2_CFGCRCSTS);
2262         /* to improve read performance, set outstanding to 2 */
2263         sdr_set_field(host->base + EMMC50_CFG3, EMMC50_CFG3_OUTS_WR, 2);
2264
2265         return 0;
2266 }
2267
2268 static int msdc_execute_hs400_tuning(struct mmc_host *mmc, struct mmc_card *card)
2269 {
2270         struct msdc_host *host = mmc_priv(mmc);
2271         struct msdc_delay_phase dly1_delay;
2272         u32 val, result_dly1 = 0;
2273         u8 *ext_csd;
2274         int i, ret;
2275
2276         if (host->top_base) {
2277                 sdr_set_bits(host->top_base + EMMC50_PAD_DS_TUNE,
2278                              PAD_DS_DLY_SEL);
2279                 if (host->hs400_ds_dly3)
2280                         sdr_set_field(host->top_base + EMMC50_PAD_DS_TUNE,
2281                                       PAD_DS_DLY3, host->hs400_ds_dly3);
2282         } else {
2283                 sdr_set_bits(host->base + PAD_DS_TUNE, PAD_DS_TUNE_DLY_SEL);
2284                 if (host->hs400_ds_dly3)
2285                         sdr_set_field(host->base + PAD_DS_TUNE,
2286                                       PAD_DS_TUNE_DLY3, host->hs400_ds_dly3);
2287         }
2288
2289         host->hs400_tuning = true;
2290         for (i = 0; i < PAD_DELAY_MAX; i++) {
2291                 if (host->top_base)
2292                         sdr_set_field(host->top_base + EMMC50_PAD_DS_TUNE,
2293                                       PAD_DS_DLY1, i);
2294                 else
2295                         sdr_set_field(host->base + PAD_DS_TUNE,
2296                                       PAD_DS_TUNE_DLY1, i);
2297                 ret = mmc_get_ext_csd(card, &ext_csd);
2298                 if (!ret) {
2299                         result_dly1 |= BIT(i);
2300                         kfree(ext_csd);
2301                 }
2302         }
2303         host->hs400_tuning = false;
2304
2305         dly1_delay = get_best_delay(host, result_dly1);
2306         if (dly1_delay.maxlen == 0) {
2307                 dev_err(host->dev, "Failed to get DLY1 delay!\n");
2308                 goto fail;
2309         }
2310         if (host->top_base)
2311                 sdr_set_field(host->top_base + EMMC50_PAD_DS_TUNE,
2312                               PAD_DS_DLY1, dly1_delay.final_phase);
2313         else
2314                 sdr_set_field(host->base + PAD_DS_TUNE,
2315                               PAD_DS_TUNE_DLY1, dly1_delay.final_phase);
2316
2317         if (host->top_base)
2318                 val = readl(host->top_base + EMMC50_PAD_DS_TUNE);
2319         else
2320                 val = readl(host->base + PAD_DS_TUNE);
2321
2322         dev_info(host->dev, "Fianl PAD_DS_TUNE: 0x%x\n", val);
2323
2324         return 0;
2325
2326 fail:
2327         dev_err(host->dev, "Failed to tuning DS pin delay!\n");
2328         return -EIO;
2329 }
2330
2331 static void msdc_hw_reset(struct mmc_host *mmc)
2332 {
2333         struct msdc_host *host = mmc_priv(mmc);
2334
2335         sdr_set_bits(host->base + EMMC_IOCON, 1);
2336         udelay(10); /* 10us is enough */
2337         sdr_clr_bits(host->base + EMMC_IOCON, 1);
2338 }
2339
2340 static void msdc_ack_sdio_irq(struct mmc_host *mmc)
2341 {
2342         unsigned long flags;
2343         struct msdc_host *host = mmc_priv(mmc);
2344
2345         spin_lock_irqsave(&host->lock, flags);
2346         __msdc_enable_sdio_irq(host, 1);
2347         spin_unlock_irqrestore(&host->lock, flags);
2348 }
2349
2350 static int msdc_get_cd(struct mmc_host *mmc)
2351 {
2352         struct msdc_host *host = mmc_priv(mmc);
2353         int val;
2354
2355         if (mmc->caps & MMC_CAP_NONREMOVABLE)
2356                 return 1;
2357
2358         if (!host->internal_cd)
2359                 return mmc_gpio_get_cd(mmc);
2360
2361         val = readl(host->base + MSDC_PS) & MSDC_PS_CDSTS;
2362         if (mmc->caps2 & MMC_CAP2_CD_ACTIVE_HIGH)
2363                 return !!val;
2364         else
2365                 return !val;
2366 }
2367
2368 static void msdc_hs400_enhanced_strobe(struct mmc_host *mmc,
2369                                        struct mmc_ios *ios)
2370 {
2371         struct msdc_host *host = mmc_priv(mmc);
2372
2373         if (ios->enhanced_strobe) {
2374                 msdc_prepare_hs400_tuning(mmc, ios);
2375                 sdr_set_field(host->base + EMMC50_CFG0, EMMC50_CFG_PADCMD_LATCHCK, 1);
2376                 sdr_set_field(host->base + EMMC50_CFG0, EMMC50_CFG_CMD_RESP_SEL, 1);
2377                 sdr_set_field(host->base + EMMC50_CFG1, EMMC50_CFG1_DS_CFG, 1);
2378
2379                 sdr_clr_bits(host->base + CQHCI_SETTING, CQHCI_RD_CMD_WND_SEL);
2380                 sdr_clr_bits(host->base + CQHCI_SETTING, CQHCI_WR_CMD_WND_SEL);
2381                 sdr_clr_bits(host->base + EMMC51_CFG0, CMDQ_RDAT_CNT);
2382         } else {
2383                 sdr_set_field(host->base + EMMC50_CFG0, EMMC50_CFG_PADCMD_LATCHCK, 0);
2384                 sdr_set_field(host->base + EMMC50_CFG0, EMMC50_CFG_CMD_RESP_SEL, 0);
2385                 sdr_set_field(host->base + EMMC50_CFG1, EMMC50_CFG1_DS_CFG, 0);
2386
2387                 sdr_set_bits(host->base + CQHCI_SETTING, CQHCI_RD_CMD_WND_SEL);
2388                 sdr_set_bits(host->base + CQHCI_SETTING, CQHCI_WR_CMD_WND_SEL);
2389                 sdr_set_field(host->base + EMMC51_CFG0, CMDQ_RDAT_CNT, 0xb4);
2390         }
2391 }
2392
2393 static void msdc_cqe_enable(struct mmc_host *mmc)
2394 {
2395         struct msdc_host *host = mmc_priv(mmc);
2396
2397         /* enable cmdq irq */
2398         writel(MSDC_INT_CMDQ, host->base + MSDC_INTEN);
2399         /* enable busy check */
2400         sdr_set_bits(host->base + MSDC_PATCH_BIT1, MSDC_PB1_BUSY_CHECK_SEL);
2401         /* default write data / busy timeout 20s */
2402         msdc_set_busy_timeout(host, 20 * 1000000000ULL, 0);
2403         /* default read data timeout 1s */
2404         msdc_set_timeout(host, 1000000000ULL, 0);
2405 }
2406
2407 static void msdc_cqe_disable(struct mmc_host *mmc, bool recovery)
2408 {
2409         struct msdc_host *host = mmc_priv(mmc);
2410         unsigned int val = 0;
2411
2412         /* disable cmdq irq */
2413         sdr_clr_bits(host->base + MSDC_INTEN, MSDC_INT_CMDQ);
2414         /* disable busy check */
2415         sdr_clr_bits(host->base + MSDC_PATCH_BIT1, MSDC_PB1_BUSY_CHECK_SEL);
2416
2417         if (recovery) {
2418                 sdr_set_field(host->base + MSDC_DMA_CTRL,
2419                               MSDC_DMA_CTRL_STOP, 1);
2420                 if (WARN_ON(readl_poll_timeout(host->base + MSDC_DMA_CTRL, val,
2421                         !(val & MSDC_DMA_CTRL_STOP), 1, 3000)))
2422                         return;
2423                 if (WARN_ON(readl_poll_timeout(host->base + MSDC_DMA_CFG, val,
2424                         !(val & MSDC_DMA_CFG_STS), 1, 3000)))
2425                         return;
2426                 msdc_reset_hw(host);
2427         }
2428 }
2429
2430 static void msdc_cqe_pre_enable(struct mmc_host *mmc)
2431 {
2432         struct cqhci_host *cq_host = mmc->cqe_private;
2433         u32 reg;
2434
2435         reg = cqhci_readl(cq_host, CQHCI_CFG);
2436         reg |= CQHCI_ENABLE;
2437         cqhci_writel(cq_host, reg, CQHCI_CFG);
2438 }
2439
2440 static void msdc_cqe_post_disable(struct mmc_host *mmc)
2441 {
2442         struct cqhci_host *cq_host = mmc->cqe_private;
2443         u32 reg;
2444
2445         reg = cqhci_readl(cq_host, CQHCI_CFG);
2446         reg &= ~CQHCI_ENABLE;
2447         cqhci_writel(cq_host, reg, CQHCI_CFG);
2448 }
2449
2450 static const struct mmc_host_ops mt_msdc_ops = {
2451         .post_req = msdc_post_req,
2452         .pre_req = msdc_pre_req,
2453         .request = msdc_ops_request,
2454         .set_ios = msdc_ops_set_ios,
2455         .get_ro = mmc_gpio_get_ro,
2456         .get_cd = msdc_get_cd,
2457         .hs400_enhanced_strobe = msdc_hs400_enhanced_strobe,
2458         .enable_sdio_irq = msdc_enable_sdio_irq,
2459         .ack_sdio_irq = msdc_ack_sdio_irq,
2460         .start_signal_voltage_switch = msdc_ops_switch_volt,
2461         .card_busy = msdc_card_busy,
2462         .execute_tuning = msdc_execute_tuning,
2463         .prepare_hs400_tuning = msdc_prepare_hs400_tuning,
2464         .execute_hs400_tuning = msdc_execute_hs400_tuning,
2465         .card_hw_reset = msdc_hw_reset,
2466 };
2467
2468 static const struct cqhci_host_ops msdc_cmdq_ops = {
2469         .enable         = msdc_cqe_enable,
2470         .disable        = msdc_cqe_disable,
2471         .pre_enable = msdc_cqe_pre_enable,
2472         .post_disable = msdc_cqe_post_disable,
2473 };
2474
2475 static void msdc_of_property_parse(struct platform_device *pdev,
2476                                    struct msdc_host *host)
2477 {
2478         of_property_read_u32(pdev->dev.of_node, "mediatek,latch-ck",
2479                              &host->latch_ck);
2480
2481         of_property_read_u32(pdev->dev.of_node, "hs400-ds-delay",
2482                              &host->hs400_ds_delay);
2483
2484         of_property_read_u32(pdev->dev.of_node, "mediatek,hs400-ds-dly3",
2485                              &host->hs400_ds_dly3);
2486
2487         of_property_read_u32(pdev->dev.of_node, "mediatek,hs200-cmd-int-delay",
2488                              &host->hs200_cmd_int_delay);
2489
2490         of_property_read_u32(pdev->dev.of_node, "mediatek,hs400-cmd-int-delay",
2491                              &host->hs400_cmd_int_delay);
2492
2493         if (of_property_read_bool(pdev->dev.of_node,
2494                                   "mediatek,hs400-cmd-resp-sel-rising"))
2495                 host->hs400_cmd_resp_sel_rising = true;
2496         else
2497                 host->hs400_cmd_resp_sel_rising = false;
2498
2499         if (of_property_read_bool(pdev->dev.of_node,
2500                                   "supports-cqe"))
2501                 host->cqhci = true;
2502         else
2503                 host->cqhci = false;
2504 }
2505
2506 static int msdc_of_clock_parse(struct platform_device *pdev,
2507                                struct msdc_host *host)
2508 {
2509         int ret;
2510
2511         host->src_clk = devm_clk_get(&pdev->dev, "source");
2512         if (IS_ERR(host->src_clk))
2513                 return PTR_ERR(host->src_clk);
2514
2515         host->h_clk = devm_clk_get(&pdev->dev, "hclk");
2516         if (IS_ERR(host->h_clk))
2517                 return PTR_ERR(host->h_clk);
2518
2519         host->bus_clk = devm_clk_get_optional(&pdev->dev, "bus_clk");
2520         if (IS_ERR(host->bus_clk))
2521                 host->bus_clk = NULL;
2522
2523         /*source clock control gate is optional clock*/
2524         host->src_clk_cg = devm_clk_get_optional(&pdev->dev, "source_cg");
2525         if (IS_ERR(host->src_clk_cg))
2526                 return PTR_ERR(host->src_clk_cg);
2527
2528         /*
2529          * Fallback for legacy device-trees: src_clk and HCLK use the same
2530          * bit to control gating but they are parented to a different mux,
2531          * hence if our intention is to gate only the source, required
2532          * during a clk mode switch to avoid hw hangs, we need to gate
2533          * its parent (specified as a different clock only on new DTs).
2534          */
2535         if (!host->src_clk_cg) {
2536                 host->src_clk_cg = clk_get_parent(host->src_clk);
2537                 if (IS_ERR(host->src_clk_cg))
2538                         return PTR_ERR(host->src_clk_cg);
2539         }
2540
2541         host->sys_clk_cg = devm_clk_get_optional(&pdev->dev, "sys_cg");
2542         if (IS_ERR(host->sys_clk_cg))
2543                 host->sys_clk_cg = NULL;
2544
2545         /* If present, always enable for this clock gate */
2546         clk_prepare_enable(host->sys_clk_cg);
2547
2548         host->bulk_clks[0].id = "pclk_cg";
2549         host->bulk_clks[1].id = "axi_cg";
2550         host->bulk_clks[2].id = "ahb_cg";
2551         ret = devm_clk_bulk_get_optional(&pdev->dev, MSDC_NR_CLOCKS,
2552                                          host->bulk_clks);
2553         if (ret) {
2554                 dev_err(&pdev->dev, "Cannot get pclk/axi/ahb clock gates\n");
2555                 return ret;
2556         }
2557
2558         return 0;
2559 }
2560
2561 static int msdc_drv_probe(struct platform_device *pdev)
2562 {
2563         struct mmc_host *mmc;
2564         struct msdc_host *host;
2565         struct resource *res;
2566         int ret;
2567
2568         if (!pdev->dev.of_node) {
2569                 dev_err(&pdev->dev, "No DT found\n");
2570                 return -EINVAL;
2571         }
2572
2573         /* Allocate MMC host for this device */
2574         mmc = mmc_alloc_host(sizeof(struct msdc_host), &pdev->dev);
2575         if (!mmc)
2576                 return -ENOMEM;
2577
2578         host = mmc_priv(mmc);
2579         ret = mmc_of_parse(mmc);
2580         if (ret)
2581                 goto host_free;
2582
2583         host->base = devm_platform_ioremap_resource(pdev, 0);
2584         if (IS_ERR(host->base)) {
2585                 ret = PTR_ERR(host->base);
2586                 goto host_free;
2587         }
2588
2589         res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
2590         if (res) {
2591                 host->top_base = devm_ioremap_resource(&pdev->dev, res);
2592                 if (IS_ERR(host->top_base))
2593                         host->top_base = NULL;
2594         }
2595
2596         ret = mmc_regulator_get_supply(mmc);
2597         if (ret)
2598                 goto host_free;
2599
2600         ret = msdc_of_clock_parse(pdev, host);
2601         if (ret)
2602                 goto host_free;
2603
2604         host->reset = devm_reset_control_get_optional_exclusive(&pdev->dev,
2605                                                                 "hrst");
2606         if (IS_ERR(host->reset)) {
2607                 ret = PTR_ERR(host->reset);
2608                 goto host_free;
2609         }
2610
2611         host->irq = platform_get_irq(pdev, 0);
2612         if (host->irq < 0) {
2613                 ret = -EINVAL;
2614                 goto host_free;
2615         }
2616
2617         host->pinctrl = devm_pinctrl_get(&pdev->dev);
2618         if (IS_ERR(host->pinctrl)) {
2619                 ret = PTR_ERR(host->pinctrl);
2620                 dev_err(&pdev->dev, "Cannot find pinctrl!\n");
2621                 goto host_free;
2622         }
2623
2624         host->pins_default = pinctrl_lookup_state(host->pinctrl, "default");
2625         if (IS_ERR(host->pins_default)) {
2626                 ret = PTR_ERR(host->pins_default);
2627                 dev_err(&pdev->dev, "Cannot find pinctrl default!\n");
2628                 goto host_free;
2629         }
2630
2631         host->pins_uhs = pinctrl_lookup_state(host->pinctrl, "state_uhs");
2632         if (IS_ERR(host->pins_uhs)) {
2633                 ret = PTR_ERR(host->pins_uhs);
2634                 dev_err(&pdev->dev, "Cannot find pinctrl uhs!\n");
2635                 goto host_free;
2636         }
2637
2638         msdc_of_property_parse(pdev, host);
2639
2640         host->dev = &pdev->dev;
2641         host->dev_comp = of_device_get_match_data(&pdev->dev);
2642         host->src_clk_freq = clk_get_rate(host->src_clk);
2643         /* Set host parameters to mmc */
2644         mmc->ops = &mt_msdc_ops;
2645         if (host->dev_comp->clk_div_bits == 8)
2646                 mmc->f_min = DIV_ROUND_UP(host->src_clk_freq, 4 * 255);
2647         else
2648                 mmc->f_min = DIV_ROUND_UP(host->src_clk_freq, 4 * 4095);
2649
2650         if (!(mmc->caps & MMC_CAP_NONREMOVABLE) &&
2651             !mmc_can_gpio_cd(mmc) &&
2652             host->dev_comp->use_internal_cd) {
2653                 /*
2654                  * Is removable but no GPIO declared, so
2655                  * use internal functionality.
2656                  */
2657                 host->internal_cd = true;
2658         }
2659
2660         if (mmc->caps & MMC_CAP_SDIO_IRQ)
2661                 mmc->caps2 |= MMC_CAP2_SDIO_IRQ_NOTHREAD;
2662
2663         mmc->caps |= MMC_CAP_CMD23;
2664         if (host->cqhci)
2665                 mmc->caps2 |= MMC_CAP2_CQE | MMC_CAP2_CQE_DCMD;
2666         /* MMC core transfer sizes tunable parameters */
2667         mmc->max_segs = MAX_BD_NUM;
2668         if (host->dev_comp->support_64g)
2669                 mmc->max_seg_size = BDMA_DESC_BUFLEN_EXT;
2670         else
2671                 mmc->max_seg_size = BDMA_DESC_BUFLEN;
2672         mmc->max_blk_size = 2048;
2673         mmc->max_req_size = 512 * 1024;
2674         mmc->max_blk_count = mmc->max_req_size / 512;
2675         if (host->dev_comp->support_64g)
2676                 host->dma_mask = DMA_BIT_MASK(36);
2677         else
2678                 host->dma_mask = DMA_BIT_MASK(32);
2679         mmc_dev(mmc)->dma_mask = &host->dma_mask;
2680
2681         host->timeout_clks = 3 * 1048576;
2682         host->dma.gpd = dma_alloc_coherent(&pdev->dev,
2683                                 2 * sizeof(struct mt_gpdma_desc),
2684                                 &host->dma.gpd_addr, GFP_KERNEL);
2685         host->dma.bd = dma_alloc_coherent(&pdev->dev,
2686                                 MAX_BD_NUM * sizeof(struct mt_bdma_desc),
2687                                 &host->dma.bd_addr, GFP_KERNEL);
2688         if (!host->dma.gpd || !host->dma.bd) {
2689                 ret = -ENOMEM;
2690                 goto release_mem;
2691         }
2692         msdc_init_gpd_bd(host, &host->dma);
2693         INIT_DELAYED_WORK(&host->req_timeout, msdc_request_timeout);
2694         spin_lock_init(&host->lock);
2695
2696         platform_set_drvdata(pdev, mmc);
2697         ret = msdc_ungate_clock(host);
2698         if (ret) {
2699                 dev_err(&pdev->dev, "Cannot ungate clocks!\n");
2700                 goto release_mem;
2701         }
2702         msdc_init_hw(host);
2703
2704         if (mmc->caps2 & MMC_CAP2_CQE) {
2705                 host->cq_host = devm_kzalloc(mmc->parent,
2706                                              sizeof(*host->cq_host),
2707                                              GFP_KERNEL);
2708                 if (!host->cq_host) {
2709                         ret = -ENOMEM;
2710                         goto host_free;
2711                 }
2712                 host->cq_host->caps |= CQHCI_TASK_DESC_SZ_128;
2713                 host->cq_host->mmio = host->base + 0x800;
2714                 host->cq_host->ops = &msdc_cmdq_ops;
2715                 ret = cqhci_init(host->cq_host, mmc, true);
2716                 if (ret)
2717                         goto host_free;
2718                 mmc->max_segs = 128;
2719                 /* cqhci 16bit length */
2720                 /* 0 size, means 65536 so we don't have to -1 here */
2721                 mmc->max_seg_size = 64 * 1024;
2722         }
2723
2724         ret = devm_request_irq(&pdev->dev, host->irq, msdc_irq,
2725                                IRQF_TRIGGER_NONE, pdev->name, host);
2726         if (ret)
2727                 goto release;
2728
2729         pm_runtime_set_active(host->dev);
2730         pm_runtime_set_autosuspend_delay(host->dev, MTK_MMC_AUTOSUSPEND_DELAY);
2731         pm_runtime_use_autosuspend(host->dev);
2732         pm_runtime_enable(host->dev);
2733         ret = mmc_add_host(mmc);
2734
2735         if (ret)
2736                 goto end;
2737
2738         return 0;
2739 end:
2740         pm_runtime_disable(host->dev);
2741 release:
2742         platform_set_drvdata(pdev, NULL);
2743         msdc_deinit_hw(host);
2744         msdc_gate_clock(host);
2745 release_mem:
2746         if (host->dma.gpd)
2747                 dma_free_coherent(&pdev->dev,
2748                         2 * sizeof(struct mt_gpdma_desc),
2749                         host->dma.gpd, host->dma.gpd_addr);
2750         if (host->dma.bd)
2751                 dma_free_coherent(&pdev->dev,
2752                         MAX_BD_NUM * sizeof(struct mt_bdma_desc),
2753                         host->dma.bd, host->dma.bd_addr);
2754 host_free:
2755         mmc_free_host(mmc);
2756
2757         return ret;
2758 }
2759
2760 static int msdc_drv_remove(struct platform_device *pdev)
2761 {
2762         struct mmc_host *mmc;
2763         struct msdc_host *host;
2764
2765         mmc = platform_get_drvdata(pdev);
2766         host = mmc_priv(mmc);
2767
2768         pm_runtime_get_sync(host->dev);
2769
2770         platform_set_drvdata(pdev, NULL);
2771         mmc_remove_host(mmc);
2772         msdc_deinit_hw(host);
2773         msdc_gate_clock(host);
2774
2775         pm_runtime_disable(host->dev);
2776         pm_runtime_put_noidle(host->dev);
2777         dma_free_coherent(&pdev->dev,
2778                         2 * sizeof(struct mt_gpdma_desc),
2779                         host->dma.gpd, host->dma.gpd_addr);
2780         dma_free_coherent(&pdev->dev, MAX_BD_NUM * sizeof(struct mt_bdma_desc),
2781                         host->dma.bd, host->dma.bd_addr);
2782
2783         mmc_free_host(mmc);
2784
2785         return 0;
2786 }
2787
2788 static void msdc_save_reg(struct msdc_host *host)
2789 {
2790         u32 tune_reg = host->dev_comp->pad_tune_reg;
2791
2792         host->save_para.msdc_cfg = readl(host->base + MSDC_CFG);
2793         host->save_para.iocon = readl(host->base + MSDC_IOCON);
2794         host->save_para.sdc_cfg = readl(host->base + SDC_CFG);
2795         host->save_para.patch_bit0 = readl(host->base + MSDC_PATCH_BIT);
2796         host->save_para.patch_bit1 = readl(host->base + MSDC_PATCH_BIT1);
2797         host->save_para.patch_bit2 = readl(host->base + MSDC_PATCH_BIT2);
2798         host->save_para.pad_ds_tune = readl(host->base + PAD_DS_TUNE);
2799         host->save_para.pad_cmd_tune = readl(host->base + PAD_CMD_TUNE);
2800         host->save_para.emmc50_cfg0 = readl(host->base + EMMC50_CFG0);
2801         host->save_para.emmc50_cfg3 = readl(host->base + EMMC50_CFG3);
2802         host->save_para.sdc_fifo_cfg = readl(host->base + SDC_FIFO_CFG);
2803         if (host->top_base) {
2804                 host->save_para.emmc_top_control =
2805                         readl(host->top_base + EMMC_TOP_CONTROL);
2806                 host->save_para.emmc_top_cmd =
2807                         readl(host->top_base + EMMC_TOP_CMD);
2808                 host->save_para.emmc50_pad_ds_tune =
2809                         readl(host->top_base + EMMC50_PAD_DS_TUNE);
2810         } else {
2811                 host->save_para.pad_tune = readl(host->base + tune_reg);
2812         }
2813 }
2814
2815 static void msdc_restore_reg(struct msdc_host *host)
2816 {
2817         struct mmc_host *mmc = mmc_from_priv(host);
2818         u32 tune_reg = host->dev_comp->pad_tune_reg;
2819
2820         writel(host->save_para.msdc_cfg, host->base + MSDC_CFG);
2821         writel(host->save_para.iocon, host->base + MSDC_IOCON);
2822         writel(host->save_para.sdc_cfg, host->base + SDC_CFG);
2823         writel(host->save_para.patch_bit0, host->base + MSDC_PATCH_BIT);
2824         writel(host->save_para.patch_bit1, host->base + MSDC_PATCH_BIT1);
2825         writel(host->save_para.patch_bit2, host->base + MSDC_PATCH_BIT2);
2826         writel(host->save_para.pad_ds_tune, host->base + PAD_DS_TUNE);
2827         writel(host->save_para.pad_cmd_tune, host->base + PAD_CMD_TUNE);
2828         writel(host->save_para.emmc50_cfg0, host->base + EMMC50_CFG0);
2829         writel(host->save_para.emmc50_cfg3, host->base + EMMC50_CFG3);
2830         writel(host->save_para.sdc_fifo_cfg, host->base + SDC_FIFO_CFG);
2831         if (host->top_base) {
2832                 writel(host->save_para.emmc_top_control,
2833                        host->top_base + EMMC_TOP_CONTROL);
2834                 writel(host->save_para.emmc_top_cmd,
2835                        host->top_base + EMMC_TOP_CMD);
2836                 writel(host->save_para.emmc50_pad_ds_tune,
2837                        host->top_base + EMMC50_PAD_DS_TUNE);
2838         } else {
2839                 writel(host->save_para.pad_tune, host->base + tune_reg);
2840         }
2841
2842         if (sdio_irq_claimed(mmc))
2843                 __msdc_enable_sdio_irq(host, 1);
2844 }
2845
2846 static int __maybe_unused msdc_runtime_suspend(struct device *dev)
2847 {
2848         struct mmc_host *mmc = dev_get_drvdata(dev);
2849         struct msdc_host *host = mmc_priv(mmc);
2850
2851         msdc_save_reg(host);
2852         msdc_gate_clock(host);
2853         return 0;
2854 }
2855
2856 static int __maybe_unused msdc_runtime_resume(struct device *dev)
2857 {
2858         struct mmc_host *mmc = dev_get_drvdata(dev);
2859         struct msdc_host *host = mmc_priv(mmc);
2860         int ret;
2861
2862         ret = msdc_ungate_clock(host);
2863         if (ret)
2864                 return ret;
2865
2866         msdc_restore_reg(host);
2867         return 0;
2868 }
2869
2870 static int __maybe_unused msdc_suspend(struct device *dev)
2871 {
2872         struct mmc_host *mmc = dev_get_drvdata(dev);
2873         int ret;
2874
2875         if (mmc->caps2 & MMC_CAP2_CQE) {
2876                 ret = cqhci_suspend(mmc);
2877                 if (ret)
2878                         return ret;
2879         }
2880
2881         return pm_runtime_force_suspend(dev);
2882 }
2883
2884 static int __maybe_unused msdc_resume(struct device *dev)
2885 {
2886         return pm_runtime_force_resume(dev);
2887 }
2888
2889 static const struct dev_pm_ops msdc_dev_pm_ops = {
2890         SET_SYSTEM_SLEEP_PM_OPS(msdc_suspend, msdc_resume)
2891         SET_RUNTIME_PM_OPS(msdc_runtime_suspend, msdc_runtime_resume, NULL)
2892 };
2893
2894 static struct platform_driver mt_msdc_driver = {
2895         .probe = msdc_drv_probe,
2896         .remove = msdc_drv_remove,
2897         .driver = {
2898                 .name = "mtk-msdc",
2899                 .probe_type = PROBE_PREFER_ASYNCHRONOUS,
2900                 .of_match_table = msdc_of_ids,
2901                 .pm = &msdc_dev_pm_ops,
2902         },
2903 };
2904
2905 module_platform_driver(mt_msdc_driver);
2906 MODULE_LICENSE("GPL v2");
2907 MODULE_DESCRIPTION("MediaTek SD/MMC Card Driver");