1 /* 2 * Synopsys DesignWare Multimedia Card Interface driver 3 * (Based on NXP driver for lpc 31xx) 4 * 5 * Copyright (C) 2009 NXP Semiconductors 6 * Copyright (C) 2009, 2010 Imagination Technologies Ltd. 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License as published by 10 * the Free Software Foundation; either version 2 of the License, or 11 * (at your option) any later version. 12 */ 13 14 #ifndef _DW_MMC_H_ 15 #define _DW_MMC_H_ 16 17 #include <linux/scatterlist.h> 18 #include <linux/mmc/core.h> 19 #include <linux/dmaengine.h> 20 #include <linux/reset.h> 21 #include <linux/interrupt.h> 22 23 enum dw_mci_state { 24 STATE_IDLE = 0, 25 STATE_SENDING_CMD, 26 STATE_SENDING_DATA, 27 STATE_DATA_BUSY, 28 STATE_SENDING_STOP, 29 STATE_DATA_ERROR, 30 STATE_SENDING_CMD11, 31 STATE_WAITING_CMD11_DONE, 32 }; 33 34 enum { 35 EVENT_CMD_COMPLETE = 0, 36 EVENT_XFER_COMPLETE, 37 EVENT_DATA_COMPLETE, 38 EVENT_DATA_ERROR, 39 }; 40 41 enum dw_mci_cookie { 42 COOKIE_UNMAPPED, 43 COOKIE_PRE_MAPPED, /* mapped by pre_req() of dwmmc */ 44 COOKIE_MAPPED, /* mapped by prepare_data() of dwmmc */ 45 }; 46 47 struct mmc_data; 48 49 enum { 50 TRANS_MODE_PIO = 0, 51 TRANS_MODE_IDMAC, 52 TRANS_MODE_EDMAC 53 }; 54 55 struct dw_mci_dma_slave { 56 struct dma_chan *ch; 57 enum dma_transfer_direction direction; 58 }; 59 60 /** 61 * struct dw_mci - MMC controller state shared between all slots 62 * @lock: Spinlock protecting the queue and associated data. 63 * @irq_lock: Spinlock protecting the INTMASK setting. 64 * @regs: Pointer to MMIO registers. 65 * @fifo_reg: Pointer to MMIO registers for data FIFO 66 * @sg: Scatterlist entry currently being processed by PIO code, if any. 67 * @sg_miter: PIO mapping scatterlist iterator. 68 * @cur_slot: The slot which is currently using the controller. 69 * @mrq: The request currently being processed on @cur_slot, 70 * or NULL if the controller is idle. 71 * @cmd: The command currently being sent to the card, or NULL. 72 * @data: The data currently being transferred, or NULL if no data 73 * transfer is in progress. 74 * @stop_abort: The command currently prepared for stoping transfer. 75 * @prev_blksz: The former transfer blksz record. 76 * @timing: Record of current ios timing. 77 * @use_dma: Which DMA channel is in use for the current transfer, zero 78 * denotes PIO mode. 79 * @using_dma: Whether DMA is in use for the current transfer. 80 * @dma_64bit_address: Whether DMA supports 64-bit address mode or not. 81 * @sg_dma: Bus address of DMA buffer. 82 * @sg_cpu: Virtual address of DMA buffer. 83 * @dma_ops: Pointer to platform-specific DMA callbacks. 84 * @cmd_status: Snapshot of SR taken upon completion of the current 85 * @ring_size: Buffer size for idma descriptors. 86 * command. Only valid when EVENT_CMD_COMPLETE is pending. 87 * @dms: structure of slave-dma private data. 88 * @phy_regs: physical address of controller's register map 89 * @data_status: Snapshot of SR taken upon completion of the current 90 * data transfer. Only valid when EVENT_DATA_COMPLETE or 91 * EVENT_DATA_ERROR is pending. 92 * @stop_cmdr: Value to be loaded into CMDR when the stop command is 93 * to be sent. 94 * @dir_status: Direction of current transfer. 95 * @tasklet: Tasklet running the request state machine. 96 * @pending_events: Bitmask of events flagged by the interrupt handler 97 * to be processed by the tasklet. 98 * @completed_events: Bitmask of events which the state machine has 99 * processed. 100 * @state: Tasklet state. 101 * @queue: List of slots waiting for access to the controller. 102 * @bus_hz: The rate of @mck in Hz. This forms the basis for MMC bus 103 * rate and timeout calculations. 104 * @current_speed: Configured rate of the controller. 105 * @num_slots: Number of slots available. 106 * @fifoth_val: The value of FIFOTH register. 107 * @verid: Denote Version ID. 108 * @dev: Device associated with the MMC controller. 109 * @pdata: Platform data associated with the MMC controller. 110 * @drv_data: Driver specific data for identified variant of the controller 111 * @priv: Implementation defined private data. 112 * @biu_clk: Pointer to bus interface unit clock instance. 113 * @ciu_clk: Pointer to card interface unit clock instance. 114 * @slot: Slots sharing this MMC controller. 115 * @fifo_depth: depth of FIFO. 116 * @data_addr_override: override fifo reg offset with this value. 117 * @wm_aligned: force fifo watermark equal with data length in PIO mode. 118 * Set as true if alignment is needed. 119 * @data_shift: log2 of FIFO item size. 120 * @part_buf_start: Start index in part_buf. 121 * @part_buf_count: Bytes of partial data in part_buf. 122 * @part_buf: Simple buffer for partial fifo reads/writes. 123 * @push_data: Pointer to FIFO push function. 124 * @pull_data: Pointer to FIFO pull function. 125 * @vqmmc_enabled: Status of vqmmc, should be true or false. 126 * @irq_flags: The flags to be passed to request_irq. 127 * @irq: The irq value to be passed to request_irq. 128 * @sdio_id0: Number of slot0 in the SDIO interrupt registers. 129 * @cmd11_timer: Timer for SD3.0 voltage switch over scheme. 130 * @cto_timer: Timer for broken command transfer over scheme. 131 * @dto_timer: Timer for broken data transfer over scheme. 132 * 133 * Locking 134 * ======= 135 * 136 * @lock is a softirq-safe spinlock protecting @queue as well as 137 * at the same time while holding @lock. 138 * 139 * @irq_lock is an irq-safe spinlock protecting the INTMASK register 140 * to allow the interrupt handler to modify it directly. Held for only long 141 * enough to read-modify-write INTMASK and no other locks are grabbed when 142 * holding this one. 143 * 144 * The @mrq field of struct dw_mci_slot is also protected by @lock, 145 * and must always be written at the same time as the slot is added to 146 * @queue. 147 * 148 * @pending_events and @completed_events are accessed using atomic bit 149 * operations, so they don't need any locking. 150 * 151 * None of the fields touched by the interrupt handler need any 152 * locking. However, ordering is important: Before EVENT_DATA_ERROR or 153 * EVENT_DATA_COMPLETE is set in @pending_events, all data-related 154 * interrupts must be disabled and @data_status updated with a 155 * snapshot of SR. Similarly, before EVENT_CMD_COMPLETE is set, the 156 * CMDRDY interrupt must be disabled and @cmd_status updated with a 157 * snapshot of SR, and before EVENT_XFER_COMPLETE can be set, the 158 * bytes_xfered field of @data must be written. This is ensured by 159 * using barriers. 160 */ 161 struct dw_mci { 162 spinlock_t lock; 163 spinlock_t irq_lock; 164 void __iomem *regs; 165 void __iomem *fifo_reg; 166 u32 data_addr_override; 167 bool wm_aligned; 168 169 struct scatterlist *sg; 170 struct sg_mapping_iter sg_miter; 171 172 struct mmc_request *mrq; 173 struct mmc_command *cmd; 174 struct mmc_data *data; 175 struct mmc_command stop_abort; 176 unsigned int prev_blksz; 177 unsigned char timing; 178 179 /* DMA interface members*/ 180 int use_dma; 181 int using_dma; 182 int dma_64bit_address; 183 184 dma_addr_t sg_dma; 185 void *sg_cpu; 186 const struct dw_mci_dma_ops *dma_ops; 187 /* For idmac */ 188 unsigned int ring_size; 189 190 /* For edmac */ 191 struct dw_mci_dma_slave *dms; 192 /* Registers's physical base address */ 193 resource_size_t phy_regs; 194 195 u32 cmd_status; 196 u32 data_status; 197 u32 stop_cmdr; 198 u32 dir_status; 199 struct tasklet_struct tasklet; 200 unsigned long pending_events; 201 unsigned long completed_events; 202 enum dw_mci_state state; 203 struct list_head queue; 204 205 u32 bus_hz; 206 u32 current_speed; 207 u32 fifoth_val; 208 u16 verid; 209 struct device *dev; 210 struct dw_mci_board *pdata; 211 const struct dw_mci_drv_data *drv_data; 212 void *priv; 213 struct clk *biu_clk; 214 struct clk *ciu_clk; 215 struct dw_mci_slot *slot; 216 217 /* FIFO push and pull */ 218 int fifo_depth; 219 int data_shift; 220 u8 part_buf_start; 221 u8 part_buf_count; 222 union { 223 u16 part_buf16; 224 u32 part_buf32; 225 u64 part_buf; 226 }; 227 void (*push_data)(struct dw_mci *host, void *buf, int cnt); 228 void (*pull_data)(struct dw_mci *host, void *buf, int cnt); 229 230 bool vqmmc_enabled; 231 unsigned long irq_flags; /* IRQ flags */ 232 int irq; 233 234 int sdio_id0; 235 236 struct timer_list cmd11_timer; 237 struct timer_list cto_timer; 238 struct timer_list dto_timer; 239 }; 240 241 /* DMA ops for Internal/External DMAC interface */ 242 struct dw_mci_dma_ops { 243 /* DMA Ops */ 244 int (*init)(struct dw_mci *host); 245 int (*start)(struct dw_mci *host, unsigned int sg_len); 246 void (*complete)(void *host); 247 void (*stop)(struct dw_mci *host); 248 void (*cleanup)(struct dw_mci *host); 249 void (*exit)(struct dw_mci *host); 250 }; 251 252 struct dma_pdata; 253 254 /* Board platform data */ 255 struct dw_mci_board { 256 u32 num_slots; 257 258 unsigned int bus_hz; /* Clock speed at the cclk_in pad */ 259 260 u32 caps; /* Capabilities */ 261 u32 caps2; /* More capabilities */ 262 u32 pm_caps; /* PM capabilities */ 263 /* 264 * Override fifo depth. If 0, autodetect it from the FIFOTH register, 265 * but note that this may not be reliable after a bootloader has used 266 * it. 267 */ 268 unsigned int fifo_depth; 269 270 /* delay in mS before detecting cards after interrupt */ 271 u32 detect_delay_ms; 272 273 struct reset_control *rstc; 274 struct dw_mci_dma_ops *dma_ops; 275 struct dma_pdata *data; 276 }; 277 278 #define DW_MMC_240A 0x240a 279 #define DW_MMC_280A 0x280a 280 281 #define SDMMC_CTRL 0x000 282 #define SDMMC_PWREN 0x004 283 #define SDMMC_CLKDIV 0x008 284 #define SDMMC_CLKSRC 0x00c 285 #define SDMMC_CLKENA 0x010 286 #define SDMMC_TMOUT 0x014 287 #define SDMMC_CTYPE 0x018 288 #define SDMMC_BLKSIZ 0x01c 289 #define SDMMC_BYTCNT 0x020 290 #define SDMMC_INTMASK 0x024 291 #define SDMMC_CMDARG 0x028 292 #define SDMMC_CMD 0x02c 293 #define SDMMC_RESP0 0x030 294 #define SDMMC_RESP1 0x034 295 #define SDMMC_RESP2 0x038 296 #define SDMMC_RESP3 0x03c 297 #define SDMMC_MINTSTS 0x040 298 #define SDMMC_RINTSTS 0x044 299 #define SDMMC_STATUS 0x048 300 #define SDMMC_FIFOTH 0x04c 301 #define SDMMC_CDETECT 0x050 302 #define SDMMC_WRTPRT 0x054 303 #define SDMMC_GPIO 0x058 304 #define SDMMC_TCBCNT 0x05c 305 #define SDMMC_TBBCNT 0x060 306 #define SDMMC_DEBNCE 0x064 307 #define SDMMC_USRID 0x068 308 #define SDMMC_VERID 0x06c 309 #define SDMMC_HCON 0x070 310 #define SDMMC_UHS_REG 0x074 311 #define SDMMC_RST_N 0x078 312 #define SDMMC_BMOD 0x080 313 #define SDMMC_PLDMND 0x084 314 #define SDMMC_DBADDR 0x088 315 #define SDMMC_IDSTS 0x08c 316 #define SDMMC_IDINTEN 0x090 317 #define SDMMC_DSCADDR 0x094 318 #define SDMMC_BUFADDR 0x098 319 #define SDMMC_CDTHRCTL 0x100 320 #define SDMMC_UHS_REG_EXT 0x108 321 #define SDMMC_ENABLE_SHIFT 0x110 322 #define SDMMC_DATA(x) (x) 323 /* 324 * Registers to support idmac 64-bit address mode 325 */ 326 #define SDMMC_DBADDRL 0x088 327 #define SDMMC_DBADDRU 0x08c 328 #define SDMMC_IDSTS64 0x090 329 #define SDMMC_IDINTEN64 0x094 330 #define SDMMC_DSCADDRL 0x098 331 #define SDMMC_DSCADDRU 0x09c 332 #define SDMMC_BUFADDRL 0x0A0 333 #define SDMMC_BUFADDRU 0x0A4 334 335 /* 336 * Data offset is difference according to Version 337 * Lower than 2.40a : data register offest is 0x100 338 */ 339 #define DATA_OFFSET 0x100 340 #define DATA_240A_OFFSET 0x200 341 342 /* shift bit field */ 343 #define _SBF(f, v) ((v) << (f)) 344 345 /* Control register defines */ 346 #define SDMMC_CTRL_USE_IDMAC BIT(25) 347 #define SDMMC_CTRL_CEATA_INT_EN BIT(11) 348 #define SDMMC_CTRL_SEND_AS_CCSD BIT(10) 349 #define SDMMC_CTRL_SEND_CCSD BIT(9) 350 #define SDMMC_CTRL_ABRT_READ_DATA BIT(8) 351 #define SDMMC_CTRL_SEND_IRQ_RESP BIT(7) 352 #define SDMMC_CTRL_READ_WAIT BIT(6) 353 #define SDMMC_CTRL_DMA_ENABLE BIT(5) 354 #define SDMMC_CTRL_INT_ENABLE BIT(4) 355 #define SDMMC_CTRL_DMA_RESET BIT(2) 356 #define SDMMC_CTRL_FIFO_RESET BIT(1) 357 #define SDMMC_CTRL_RESET BIT(0) 358 /* Clock Enable register defines */ 359 #define SDMMC_CLKEN_LOW_PWR BIT(16) 360 #define SDMMC_CLKEN_ENABLE BIT(0) 361 /* time-out register defines */ 362 #define SDMMC_TMOUT_DATA(n) _SBF(8, (n)) 363 #define SDMMC_TMOUT_DATA_MSK 0xFFFFFF00 364 #define SDMMC_TMOUT_RESP(n) ((n) & 0xFF) 365 #define SDMMC_TMOUT_RESP_MSK 0xFF 366 /* card-type register defines */ 367 #define SDMMC_CTYPE_8BIT BIT(16) 368 #define SDMMC_CTYPE_4BIT BIT(0) 369 #define SDMMC_CTYPE_1BIT 0 370 /* Interrupt status & mask register defines */ 371 #define SDMMC_INT_SDIO(n) BIT(16 + (n)) 372 #define SDMMC_INT_EBE BIT(15) 373 #define SDMMC_INT_ACD BIT(14) 374 #define SDMMC_INT_SBE BIT(13) 375 #define SDMMC_INT_HLE BIT(12) 376 #define SDMMC_INT_FRUN BIT(11) 377 #define SDMMC_INT_HTO BIT(10) 378 #define SDMMC_INT_VOLT_SWITCH BIT(10) /* overloads bit 10! */ 379 #define SDMMC_INT_DRTO BIT(9) 380 #define SDMMC_INT_RTO BIT(8) 381 #define SDMMC_INT_DCRC BIT(7) 382 #define SDMMC_INT_RCRC BIT(6) 383 #define SDMMC_INT_RXDR BIT(5) 384 #define SDMMC_INT_TXDR BIT(4) 385 #define SDMMC_INT_DATA_OVER BIT(3) 386 #define SDMMC_INT_CMD_DONE BIT(2) 387 #define SDMMC_INT_RESP_ERR BIT(1) 388 #define SDMMC_INT_CD BIT(0) 389 #define SDMMC_INT_ERROR 0xbfc2 390 /* Command register defines */ 391 #define SDMMC_CMD_START BIT(31) 392 #define SDMMC_CMD_USE_HOLD_REG BIT(29) 393 #define SDMMC_CMD_VOLT_SWITCH BIT(28) 394 #define SDMMC_CMD_CCS_EXP BIT(23) 395 #define SDMMC_CMD_CEATA_RD BIT(22) 396 #define SDMMC_CMD_UPD_CLK BIT(21) 397 #define SDMMC_CMD_INIT BIT(15) 398 #define SDMMC_CMD_STOP BIT(14) 399 #define SDMMC_CMD_PRV_DAT_WAIT BIT(13) 400 #define SDMMC_CMD_SEND_STOP BIT(12) 401 #define SDMMC_CMD_STRM_MODE BIT(11) 402 #define SDMMC_CMD_DAT_WR BIT(10) 403 #define SDMMC_CMD_DAT_EXP BIT(9) 404 #define SDMMC_CMD_RESP_CRC BIT(8) 405 #define SDMMC_CMD_RESP_LONG BIT(7) 406 #define SDMMC_CMD_RESP_EXP BIT(6) 407 #define SDMMC_CMD_INDX(n) ((n) & 0x1F) 408 /* Status register defines */ 409 #define SDMMC_GET_FCNT(x) (((x)>>17) & 0x1FFF) 410 #define SDMMC_STATUS_DMA_REQ BIT(31) 411 #define SDMMC_STATUS_BUSY BIT(9) 412 /* FIFOTH register defines */ 413 #define SDMMC_SET_FIFOTH(m, r, t) (((m) & 0x7) << 28 | \ 414 ((r) & 0xFFF) << 16 | \ 415 ((t) & 0xFFF)) 416 /* HCON register defines */ 417 #define DMA_INTERFACE_IDMA (0x0) 418 #define DMA_INTERFACE_DWDMA (0x1) 419 #define DMA_INTERFACE_GDMA (0x2) 420 #define DMA_INTERFACE_NODMA (0x3) 421 #define SDMMC_GET_TRANS_MODE(x) (((x)>>16) & 0x3) 422 #define SDMMC_GET_SLOT_NUM(x) ((((x)>>1) & 0x1F) + 1) 423 #define SDMMC_GET_HDATA_WIDTH(x) (((x)>>7) & 0x7) 424 #define SDMMC_GET_ADDR_CONFIG(x) (((x)>>27) & 0x1) 425 /* Internal DMAC interrupt defines */ 426 #define SDMMC_IDMAC_INT_AI BIT(9) 427 #define SDMMC_IDMAC_INT_NI BIT(8) 428 #define SDMMC_IDMAC_INT_CES BIT(5) 429 #define SDMMC_IDMAC_INT_DU BIT(4) 430 #define SDMMC_IDMAC_INT_FBE BIT(2) 431 #define SDMMC_IDMAC_INT_RI BIT(1) 432 #define SDMMC_IDMAC_INT_TI BIT(0) 433 /* Internal DMAC bus mode bits */ 434 #define SDMMC_IDMAC_ENABLE BIT(7) 435 #define SDMMC_IDMAC_FB BIT(1) 436 #define SDMMC_IDMAC_SWRESET BIT(0) 437 /* H/W reset */ 438 #define SDMMC_RST_HWACTIVE 0x1 439 /* Version ID register define */ 440 #define SDMMC_GET_VERID(x) ((x) & 0xFFFF) 441 /* Card read threshold */ 442 #define SDMMC_SET_THLD(v, x) (((v) & 0xFFF) << 16 | (x)) 443 #define SDMMC_CARD_WR_THR_EN BIT(2) 444 #define SDMMC_CARD_RD_THR_EN BIT(0) 445 /* UHS-1 register defines */ 446 #define SDMMC_UHS_18V BIT(0) 447 /* All ctrl reset bits */ 448 #define SDMMC_CTRL_ALL_RESET_FLAGS \ 449 (SDMMC_CTRL_RESET | SDMMC_CTRL_FIFO_RESET | SDMMC_CTRL_DMA_RESET) 450 451 /* FIFO register access macros. These should not change the data endian-ness 452 * as they are written to memory to be dealt with by the upper layers */ 453 #define mci_fifo_readw(__reg) __raw_readw(__reg) 454 #define mci_fifo_readl(__reg) __raw_readl(__reg) 455 #define mci_fifo_readq(__reg) __raw_readq(__reg) 456 457 #define mci_fifo_writew(__value, __reg) __raw_writew(__reg, __value) 458 #define mci_fifo_writel(__value, __reg) __raw_writel(__reg, __value) 459 #define mci_fifo_writeq(__value, __reg) __raw_writeq(__reg, __value) 460 461 /* Register access macros */ 462 #define mci_readl(dev, reg) \ 463 readl_relaxed((dev)->regs + SDMMC_##reg) 464 #define mci_writel(dev, reg, value) \ 465 writel_relaxed((value), (dev)->regs + SDMMC_##reg) 466 467 /* 16-bit FIFO access macros */ 468 #define mci_readw(dev, reg) \ 469 readw_relaxed((dev)->regs + SDMMC_##reg) 470 #define mci_writew(dev, reg, value) \ 471 writew_relaxed((value), (dev)->regs + SDMMC_##reg) 472 473 /* 64-bit FIFO access macros */ 474 #ifdef readq 475 #define mci_readq(dev, reg) \ 476 readq_relaxed((dev)->regs + SDMMC_##reg) 477 #define mci_writeq(dev, reg, value) \ 478 writeq_relaxed((value), (dev)->regs + SDMMC_##reg) 479 #else 480 /* 481 * Dummy readq implementation for architectures that don't define it. 482 * 483 * We would assume that none of these architectures would configure 484 * the IP block with a 64bit FIFO width, so this code will never be 485 * executed on those machines. Defining these macros here keeps the 486 * rest of the code free from ifdefs. 487 */ 488 #define mci_readq(dev, reg) \ 489 (*(volatile u64 __force *)((dev)->regs + SDMMC_##reg)) 490 #define mci_writeq(dev, reg, value) \ 491 (*(volatile u64 __force *)((dev)->regs + SDMMC_##reg) = (value)) 492 493 #define __raw_writeq(__value, __reg) \ 494 (*(volatile u64 __force *)(__reg) = (__value)) 495 #define __raw_readq(__reg) (*(volatile u64 __force *)(__reg)) 496 #endif 497 498 extern int dw_mci_probe(struct dw_mci *host); 499 extern void dw_mci_remove(struct dw_mci *host); 500 #ifdef CONFIG_PM 501 extern int dw_mci_runtime_suspend(struct device *device); 502 extern int dw_mci_runtime_resume(struct device *device); 503 #endif 504 505 /** 506 * struct dw_mci_slot - MMC slot state 507 * @mmc: The mmc_host representing this slot. 508 * @host: The MMC controller this slot is using. 509 * @ctype: Card type for this slot. 510 * @mrq: mmc_request currently being processed or waiting to be 511 * processed, or NULL when the slot is idle. 512 * @queue_node: List node for placing this node in the @queue list of 513 * &struct dw_mci. 514 * @clock: Clock rate configured by set_ios(). Protected by host->lock. 515 * @__clk_old: The last clock value that was requested from core. 516 * Keeping track of this helps us to avoid spamming the console. 517 * @flags: Random state bits associated with the slot. 518 * @id: Number of this slot. 519 * @sdio_id: Number of this slot in the SDIO interrupt registers. 520 */ 521 struct dw_mci_slot { 522 struct mmc_host *mmc; 523 struct dw_mci *host; 524 525 u32 ctype; 526 527 struct mmc_request *mrq; 528 struct list_head queue_node; 529 530 unsigned int clock; 531 unsigned int __clk_old; 532 533 unsigned long flags; 534 #define DW_MMC_CARD_PRESENT 0 535 #define DW_MMC_CARD_NEED_INIT 1 536 #define DW_MMC_CARD_NO_LOW_PWR 2 537 #define DW_MMC_CARD_NO_USE_HOLD 3 538 #define DW_MMC_CARD_NEEDS_POLL 4 539 int id; 540 int sdio_id; 541 }; 542 543 /** 544 * dw_mci driver data - dw-mshc implementation specific driver data. 545 * @caps: mmc subsystem specified capabilities of the controller(s). 546 * @init: early implementation specific initialization. 547 * @set_ios: handle bus specific extensions. 548 * @parse_dt: parse implementation specific device tree properties. 549 * @execute_tuning: implementation specific tuning procedure. 550 * 551 * Provide controller implementation specific extensions. The usage of this 552 * data structure is fully optional and usage of each member in this structure 553 * is optional as well. 554 */ 555 struct dw_mci_drv_data { 556 unsigned long *caps; 557 int (*init)(struct dw_mci *host); 558 void (*set_ios)(struct dw_mci *host, struct mmc_ios *ios); 559 int (*parse_dt)(struct dw_mci *host); 560 int (*execute_tuning)(struct dw_mci_slot *slot, u32 opcode); 561 int (*prepare_hs400_tuning)(struct dw_mci *host, 562 struct mmc_ios *ios); 563 int (*switch_voltage)(struct mmc_host *mmc, 564 struct mmc_ios *ios); 565 }; 566 #endif /* _DW_MMC_H_ */ 567