1 2 /* 3 * Copyright 2003-2004 Red Hat, Inc. All rights reserved. 4 * Copyright 2003-2004 Jeff Garzik 5 * 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License as published by 9 * the Free Software Foundation; either version 2, or (at your option) 10 * any later version. 11 * 12 * This program is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 * GNU General Public License for more details. 16 * 17 * You should have received a copy of the GNU General Public License 18 * along with this program; see the file COPYING. If not, write to 19 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. 20 * 21 * 22 * libata documentation is available via 'make {ps|pdf}docs', 23 * as Documentation/DocBook/libata.* 24 * 25 * Hardware documentation available from http://www.t13.org/ 26 * 27 */ 28 29 #ifndef __LINUX_ATA_H__ 30 #define __LINUX_ATA_H__ 31 32 #include <linux/types.h> 33 34 /* defines only for the constants which don't work well as enums */ 35 #define ATA_DMA_BOUNDARY 0xffffUL 36 #define ATA_DMA_MASK 0xffffffffULL 37 38 enum { 39 /* various global constants */ 40 ATA_MAX_DEVICES = 2, /* per bus/port */ 41 ATA_MAX_PRD = 256, /* we could make these 256/256 */ 42 ATA_SECT_SIZE = 512, 43 ATA_MAX_SECTORS_128 = 128, 44 ATA_MAX_SECTORS = 256, 45 ATA_MAX_SECTORS_LBA48 = 65535,/* TODO: 65536? */ 46 ATA_MAX_SECTORS_TAPE = 65535, 47 48 ATA_ID_WORDS = 256, 49 ATA_ID_SERNO = 10, 50 ATA_ID_FW_REV = 23, 51 ATA_ID_PROD = 27, 52 ATA_ID_OLD_PIO_MODES = 51, 53 ATA_ID_FIELD_VALID = 53, 54 ATA_ID_MWDMA_MODES = 63, 55 ATA_ID_PIO_MODES = 64, 56 ATA_ID_EIDE_DMA_MIN = 65, 57 ATA_ID_EIDE_PIO = 67, 58 ATA_ID_EIDE_PIO_IORDY = 68, 59 ATA_ID_UDMA_MODES = 88, 60 ATA_ID_MAJOR_VER = 80, 61 ATA_ID_PIO4 = (1 << 1), 62 63 ATA_ID_SERNO_LEN = 20, 64 ATA_ID_FW_REV_LEN = 8, 65 ATA_ID_PROD_LEN = 40, 66 67 ATA_PCI_CTL_OFS = 2, 68 69 ATA_PIO0 = (1 << 0), 70 ATA_PIO1 = ATA_PIO0 | (1 << 1), 71 ATA_PIO2 = ATA_PIO1 | (1 << 2), 72 ATA_PIO3 = ATA_PIO2 | (1 << 3), 73 ATA_PIO4 = ATA_PIO3 | (1 << 4), 74 ATA_PIO5 = ATA_PIO4 | (1 << 5), 75 ATA_PIO6 = ATA_PIO5 | (1 << 6), 76 77 ATA_SWDMA0 = (1 << 0), 78 ATA_SWDMA1 = ATA_SWDMA0 | (1 << 1), 79 ATA_SWDMA2 = ATA_SWDMA1 | (1 << 2), 80 81 ATA_SWDMA2_ONLY = (1 << 2), 82 83 ATA_MWDMA0 = (1 << 0), 84 ATA_MWDMA1 = ATA_MWDMA0 | (1 << 1), 85 ATA_MWDMA2 = ATA_MWDMA1 | (1 << 2), 86 87 ATA_MWDMA12_ONLY = (1 << 1) | (1 << 2), 88 ATA_MWDMA2_ONLY = (1 << 2), 89 90 ATA_UDMA0 = (1 << 0), 91 ATA_UDMA1 = ATA_UDMA0 | (1 << 1), 92 ATA_UDMA2 = ATA_UDMA1 | (1 << 2), 93 ATA_UDMA3 = ATA_UDMA2 | (1 << 3), 94 ATA_UDMA4 = ATA_UDMA3 | (1 << 4), 95 ATA_UDMA5 = ATA_UDMA4 | (1 << 5), 96 ATA_UDMA6 = ATA_UDMA5 | (1 << 6), 97 ATA_UDMA7 = ATA_UDMA6 | (1 << 7), 98 /* ATA_UDMA7 is just for completeness... doesn't exist (yet?). */ 99 100 ATA_UDMA_MASK_40C = ATA_UDMA2, /* udma0-2 */ 101 102 /* DMA-related */ 103 ATA_PRD_SZ = 8, 104 ATA_PRD_TBL_SZ = (ATA_MAX_PRD * ATA_PRD_SZ), 105 ATA_PRD_EOT = (1 << 31), /* end-of-table flag */ 106 107 ATA_DMA_TABLE_OFS = 4, 108 ATA_DMA_STATUS = 2, 109 ATA_DMA_CMD = 0, 110 ATA_DMA_WR = (1 << 3), 111 ATA_DMA_START = (1 << 0), 112 ATA_DMA_INTR = (1 << 2), 113 ATA_DMA_ERR = (1 << 1), 114 ATA_DMA_ACTIVE = (1 << 0), 115 116 /* bits in ATA command block registers */ 117 ATA_HOB = (1 << 7), /* LBA48 selector */ 118 ATA_NIEN = (1 << 1), /* disable-irq flag */ 119 ATA_LBA = (1 << 6), /* LBA28 selector */ 120 ATA_DEV1 = (1 << 4), /* Select Device 1 (slave) */ 121 ATA_DEVICE_OBS = (1 << 7) | (1 << 5), /* obs bits in dev reg */ 122 ATA_DEVCTL_OBS = (1 << 3), /* obsolete bit in devctl reg */ 123 ATA_BUSY = (1 << 7), /* BSY status bit */ 124 ATA_DRDY = (1 << 6), /* device ready */ 125 ATA_DF = (1 << 5), /* device fault */ 126 ATA_DRQ = (1 << 3), /* data request i/o */ 127 ATA_ERR = (1 << 0), /* have an error */ 128 ATA_SRST = (1 << 2), /* software reset */ 129 ATA_ICRC = (1 << 7), /* interface CRC error */ 130 ATA_UNC = (1 << 6), /* uncorrectable media error */ 131 ATA_IDNF = (1 << 4), /* ID not found */ 132 ATA_ABORTED = (1 << 2), /* command aborted */ 133 134 /* ATA command block registers */ 135 ATA_REG_DATA = 0x00, 136 ATA_REG_ERR = 0x01, 137 ATA_REG_NSECT = 0x02, 138 ATA_REG_LBAL = 0x03, 139 ATA_REG_LBAM = 0x04, 140 ATA_REG_LBAH = 0x05, 141 ATA_REG_DEVICE = 0x06, 142 ATA_REG_STATUS = 0x07, 143 144 ATA_REG_FEATURE = ATA_REG_ERR, /* and their aliases */ 145 ATA_REG_CMD = ATA_REG_STATUS, 146 ATA_REG_BYTEL = ATA_REG_LBAM, 147 ATA_REG_BYTEH = ATA_REG_LBAH, 148 ATA_REG_DEVSEL = ATA_REG_DEVICE, 149 ATA_REG_IRQ = ATA_REG_NSECT, 150 151 /* ATA device commands */ 152 ATA_CMD_DEV_RESET = 0x08, /* ATAPI device reset */ 153 ATA_CMD_CHK_POWER = 0xE5, /* check power mode */ 154 ATA_CMD_STANDBY = 0xE2, /* place in standby power mode */ 155 ATA_CMD_IDLE = 0xE3, /* place in idle power mode */ 156 ATA_CMD_EDD = 0x90, /* execute device diagnostic */ 157 ATA_CMD_FLUSH = 0xE7, 158 ATA_CMD_FLUSH_EXT = 0xEA, 159 ATA_CMD_ID_ATA = 0xEC, 160 ATA_CMD_ID_ATAPI = 0xA1, 161 ATA_CMD_READ = 0xC8, 162 ATA_CMD_READ_EXT = 0x25, 163 ATA_CMD_WRITE = 0xCA, 164 ATA_CMD_WRITE_EXT = 0x35, 165 ATA_CMD_WRITE_FUA_EXT = 0x3D, 166 ATA_CMD_FPDMA_READ = 0x60, 167 ATA_CMD_FPDMA_WRITE = 0x61, 168 ATA_CMD_PIO_READ = 0x20, 169 ATA_CMD_PIO_READ_EXT = 0x24, 170 ATA_CMD_PIO_WRITE = 0x30, 171 ATA_CMD_PIO_WRITE_EXT = 0x34, 172 ATA_CMD_READ_MULTI = 0xC4, 173 ATA_CMD_READ_MULTI_EXT = 0x29, 174 ATA_CMD_WRITE_MULTI = 0xC5, 175 ATA_CMD_WRITE_MULTI_EXT = 0x39, 176 ATA_CMD_WRITE_MULTI_FUA_EXT = 0xCE, 177 ATA_CMD_SET_FEATURES = 0xEF, 178 ATA_CMD_SET_MULTI = 0xC6, 179 ATA_CMD_PACKET = 0xA0, 180 ATA_CMD_VERIFY = 0x40, 181 ATA_CMD_VERIFY_EXT = 0x42, 182 ATA_CMD_STANDBYNOW1 = 0xE0, 183 ATA_CMD_IDLEIMMEDIATE = 0xE1, 184 ATA_CMD_SLEEP = 0xE6, 185 ATA_CMD_INIT_DEV_PARAMS = 0x91, 186 ATA_CMD_READ_NATIVE_MAX = 0xF8, 187 ATA_CMD_READ_NATIVE_MAX_EXT = 0x27, 188 ATA_CMD_SET_MAX = 0xF9, 189 ATA_CMD_SET_MAX_EXT = 0x37, 190 ATA_CMD_READ_LOG_EXT = 0x2f, 191 ATA_CMD_PMP_READ = 0xE4, 192 ATA_CMD_PMP_WRITE = 0xE8, 193 ATA_CMD_CONF_OVERLAY = 0xB1, 194 ATA_CMD_SEC_FREEZE_LOCK = 0xF5, 195 196 /* READ_LOG_EXT pages */ 197 ATA_LOG_SATA_NCQ = 0x10, 198 199 /* READ/WRITE LONG (obsolete) */ 200 ATA_CMD_READ_LONG = 0x22, 201 ATA_CMD_READ_LONG_ONCE = 0x23, 202 ATA_CMD_WRITE_LONG = 0x32, 203 ATA_CMD_WRITE_LONG_ONCE = 0x33, 204 205 /* SETFEATURES stuff */ 206 SETFEATURES_XFER = 0x03, 207 XFER_UDMA_7 = 0x47, 208 XFER_UDMA_6 = 0x46, 209 XFER_UDMA_5 = 0x45, 210 XFER_UDMA_4 = 0x44, 211 XFER_UDMA_3 = 0x43, 212 XFER_UDMA_2 = 0x42, 213 XFER_UDMA_1 = 0x41, 214 XFER_UDMA_0 = 0x40, 215 XFER_MW_DMA_4 = 0x24, /* CFA only */ 216 XFER_MW_DMA_3 = 0x23, /* CFA only */ 217 XFER_MW_DMA_2 = 0x22, 218 XFER_MW_DMA_1 = 0x21, 219 XFER_MW_DMA_0 = 0x20, 220 XFER_SW_DMA_2 = 0x12, 221 XFER_SW_DMA_1 = 0x11, 222 XFER_SW_DMA_0 = 0x10, 223 XFER_PIO_6 = 0x0E, /* CFA only */ 224 XFER_PIO_5 = 0x0D, /* CFA only */ 225 XFER_PIO_4 = 0x0C, 226 XFER_PIO_3 = 0x0B, 227 XFER_PIO_2 = 0x0A, 228 XFER_PIO_1 = 0x09, 229 XFER_PIO_0 = 0x08, 230 XFER_PIO_SLOW = 0x00, 231 232 SETFEATURES_WC_ON = 0x02, /* Enable write cache */ 233 SETFEATURES_WC_OFF = 0x82, /* Disable write cache */ 234 235 SETFEATURES_SPINUP = 0x07, /* Spin-up drive */ 236 237 SETFEATURES_SATA_ENABLE = 0x10, /* Enable use of SATA feature */ 238 SETFEATURES_SATA_DISABLE = 0x90, /* Disable use of SATA feature */ 239 240 /* SETFEATURE Sector counts for SATA features */ 241 SATA_AN = 0x05, /* Asynchronous Notification */ 242 SATA_DIPM = 0x03, /* Device Initiated Power Management */ 243 244 /* feature values for SET_MAX */ 245 ATA_SET_MAX_ADDR = 0x00, 246 ATA_SET_MAX_PASSWD = 0x01, 247 ATA_SET_MAX_LOCK = 0x02, 248 ATA_SET_MAX_UNLOCK = 0x03, 249 ATA_SET_MAX_FREEZE_LOCK = 0x04, 250 251 /* feature values for DEVICE CONFIGURATION OVERLAY */ 252 ATA_DCO_RESTORE = 0xC0, 253 ATA_DCO_FREEZE_LOCK = 0xC1, 254 ATA_DCO_IDENTIFY = 0xC2, 255 ATA_DCO_SET = 0xC3, 256 257 /* ATAPI stuff */ 258 ATAPI_PKT_DMA = (1 << 0), 259 ATAPI_DMADIR = (1 << 2), /* ATAPI data dir: 260 0=to device, 1=to host */ 261 ATAPI_CDB_LEN = 16, 262 263 /* PMP stuff */ 264 SATA_PMP_MAX_PORTS = 15, 265 SATA_PMP_CTRL_PORT = 15, 266 267 SATA_PMP_GSCR_DWORDS = 128, 268 SATA_PMP_GSCR_PROD_ID = 0, 269 SATA_PMP_GSCR_REV = 1, 270 SATA_PMP_GSCR_PORT_INFO = 2, 271 SATA_PMP_GSCR_ERROR = 32, 272 SATA_PMP_GSCR_ERROR_EN = 33, 273 SATA_PMP_GSCR_FEAT = 64, 274 SATA_PMP_GSCR_FEAT_EN = 96, 275 276 SATA_PMP_PSCR_STATUS = 0, 277 SATA_PMP_PSCR_ERROR = 1, 278 SATA_PMP_PSCR_CONTROL = 2, 279 280 SATA_PMP_FEAT_BIST = (1 << 0), 281 SATA_PMP_FEAT_PMREQ = (1 << 1), 282 SATA_PMP_FEAT_DYNSSC = (1 << 2), 283 SATA_PMP_FEAT_NOTIFY = (1 << 3), 284 285 /* cable types */ 286 ATA_CBL_NONE = 0, 287 ATA_CBL_PATA40 = 1, 288 ATA_CBL_PATA80 = 2, 289 ATA_CBL_PATA40_SHORT = 3, /* 40 wire cable to high UDMA spec */ 290 ATA_CBL_PATA_UNK = 4, /* don't know, maybe 80c? */ 291 ATA_CBL_PATA_IGN = 5, /* don't know, ignore cable handling */ 292 ATA_CBL_SATA = 6, 293 294 /* SATA Status and Control Registers */ 295 SCR_STATUS = 0, 296 SCR_ERROR = 1, 297 SCR_CONTROL = 2, 298 SCR_ACTIVE = 3, 299 SCR_NOTIFICATION = 4, 300 301 /* SError bits */ 302 SERR_DATA_RECOVERED = (1 << 0), /* recovered data error */ 303 SERR_COMM_RECOVERED = (1 << 1), /* recovered comm failure */ 304 SERR_DATA = (1 << 8), /* unrecovered data error */ 305 SERR_PERSISTENT = (1 << 9), /* persistent data/comm error */ 306 SERR_PROTOCOL = (1 << 10), /* protocol violation */ 307 SERR_INTERNAL = (1 << 11), /* host internal error */ 308 SERR_PHYRDY_CHG = (1 << 16), /* PHY RDY changed */ 309 SERR_PHY_INT_ERR = (1 << 17), /* PHY internal error */ 310 SERR_COMM_WAKE = (1 << 18), /* Comm wake */ 311 SERR_10B_8B_ERR = (1 << 19), /* 10b to 8b decode error */ 312 SERR_DISPARITY = (1 << 20), /* Disparity */ 313 SERR_CRC = (1 << 21), /* CRC error */ 314 SERR_HANDSHAKE = (1 << 22), /* Handshake error */ 315 SERR_LINK_SEQ_ERR = (1 << 23), /* Link sequence error */ 316 SERR_TRANS_ST_ERROR = (1 << 24), /* Transport state trans. error */ 317 SERR_UNRECOG_FIS = (1 << 25), /* Unrecognized FIS */ 318 SERR_DEV_XCHG = (1 << 26), /* device exchanged */ 319 320 /* struct ata_taskfile flags */ 321 ATA_TFLAG_LBA48 = (1 << 0), /* enable 48-bit LBA and "HOB" */ 322 ATA_TFLAG_ISADDR = (1 << 1), /* enable r/w to nsect/lba regs */ 323 ATA_TFLAG_DEVICE = (1 << 2), /* enable r/w to device reg */ 324 ATA_TFLAG_WRITE = (1 << 3), /* data dir: host->dev==1 (write) */ 325 ATA_TFLAG_LBA = (1 << 4), /* enable LBA */ 326 ATA_TFLAG_FUA = (1 << 5), /* enable FUA */ 327 ATA_TFLAG_POLLING = (1 << 6), /* set nIEN to 1 and use polling */ 328 329 /* protocol flags */ 330 ATA_PROT_FLAG_PIO = (1 << 0), /* is PIO */ 331 ATA_PROT_FLAG_DMA = (1 << 1), /* is DMA */ 332 ATA_PROT_FLAG_DATA = ATA_PROT_FLAG_PIO | ATA_PROT_FLAG_DMA, 333 ATA_PROT_FLAG_NCQ = (1 << 2), /* is NCQ */ 334 ATA_PROT_FLAG_ATAPI = (1 << 3), /* is ATAPI */ 335 }; 336 337 enum ata_tf_protocols { 338 /* ATA taskfile protocols */ 339 ATA_PROT_UNKNOWN, /* unknown/invalid */ 340 ATA_PROT_NODATA, /* no data */ 341 ATA_PROT_PIO, /* PIO data xfer */ 342 ATA_PROT_DMA, /* DMA */ 343 ATA_PROT_NCQ, /* NCQ */ 344 ATAPI_PROT_NODATA, /* packet command, no data */ 345 ATAPI_PROT_PIO, /* packet command, PIO data xfer*/ 346 ATAPI_PROT_DMA, /* packet command with special DMA sauce */ 347 }; 348 349 enum ata_ioctls { 350 ATA_IOC_GET_IO32 = 0x309, 351 ATA_IOC_SET_IO32 = 0x324, 352 }; 353 354 /* core structures */ 355 356 struct ata_prd { 357 __le32 addr; 358 __le32 flags_len; 359 }; 360 361 struct ata_taskfile { 362 unsigned long flags; /* ATA_TFLAG_xxx */ 363 u8 protocol; /* ATA_PROT_xxx */ 364 365 u8 ctl; /* control reg */ 366 367 u8 hob_feature; /* additional data */ 368 u8 hob_nsect; /* to support LBA48 */ 369 u8 hob_lbal; 370 u8 hob_lbam; 371 u8 hob_lbah; 372 373 u8 feature; 374 u8 nsect; 375 u8 lbal; 376 u8 lbam; 377 u8 lbah; 378 379 u8 device; 380 381 u8 command; /* IO operation */ 382 }; 383 384 /* 385 * protocol tests 386 */ 387 static inline unsigned int ata_prot_flags(u8 prot) 388 { 389 switch (prot) { 390 case ATA_PROT_NODATA: 391 return 0; 392 case ATA_PROT_PIO: 393 return ATA_PROT_FLAG_PIO; 394 case ATA_PROT_DMA: 395 return ATA_PROT_FLAG_DMA; 396 case ATA_PROT_NCQ: 397 return ATA_PROT_FLAG_DMA | ATA_PROT_FLAG_NCQ; 398 case ATAPI_PROT_NODATA: 399 return ATA_PROT_FLAG_ATAPI; 400 case ATAPI_PROT_PIO: 401 return ATA_PROT_FLAG_ATAPI | ATA_PROT_FLAG_PIO; 402 case ATAPI_PROT_DMA: 403 return ATA_PROT_FLAG_ATAPI | ATA_PROT_FLAG_DMA; 404 } 405 return 0; 406 } 407 408 static inline int ata_is_atapi(u8 prot) 409 { 410 return ata_prot_flags(prot) & ATA_PROT_FLAG_ATAPI; 411 } 412 413 static inline int ata_is_nodata(u8 prot) 414 { 415 return !(ata_prot_flags(prot) & ATA_PROT_FLAG_DATA); 416 } 417 418 static inline int ata_is_pio(u8 prot) 419 { 420 return ata_prot_flags(prot) & ATA_PROT_FLAG_PIO; 421 } 422 423 static inline int ata_is_dma(u8 prot) 424 { 425 return ata_prot_flags(prot) & ATA_PROT_FLAG_DMA; 426 } 427 428 static inline int ata_is_ncq(u8 prot) 429 { 430 return ata_prot_flags(prot) & ATA_PROT_FLAG_NCQ; 431 } 432 433 static inline int ata_is_data(u8 prot) 434 { 435 return ata_prot_flags(prot) & ATA_PROT_FLAG_DATA; 436 } 437 438 /* 439 * id tests 440 */ 441 #define ata_id_is_ata(id) (((id)[0] & (1 << 15)) == 0) 442 #define ata_id_has_lba(id) ((id)[49] & (1 << 9)) 443 #define ata_id_has_dma(id) ((id)[49] & (1 << 8)) 444 #define ata_id_has_ncq(id) ((id)[76] & (1 << 8)) 445 #define ata_id_queue_depth(id) (((id)[75] & 0x1f) + 1) 446 #define ata_id_removeable(id) ((id)[0] & (1 << 7)) 447 #define ata_id_has_atapi_AN(id) \ 448 ( (((id)[76] != 0x0000) && ((id)[76] != 0xffff)) && \ 449 ((id)[78] & (1 << 5)) ) 450 #define ata_id_iordy_disable(id) ((id)[49] & (1 << 10)) 451 #define ata_id_has_iordy(id) ((id)[49] & (1 << 11)) 452 #define ata_id_u32(id,n) \ 453 (((u32) (id)[(n) + 1] << 16) | ((u32) (id)[(n)])) 454 #define ata_id_u64(id,n) \ 455 ( ((u64) (id)[(n) + 3] << 48) | \ 456 ((u64) (id)[(n) + 2] << 32) | \ 457 ((u64) (id)[(n) + 1] << 16) | \ 458 ((u64) (id)[(n) + 0]) ) 459 460 #define ata_id_cdb_intr(id) (((id)[0] & 0x60) == 0x20) 461 462 static inline bool ata_id_has_hipm(const u16 *id) 463 { 464 u16 val = id[76]; 465 466 if (val == 0 || val == 0xffff) 467 return false; 468 469 return val & (1 << 9); 470 } 471 472 static inline bool ata_id_has_dipm(const u16 *id) 473 { 474 u16 val = id[78]; 475 476 if (val == 0 || val == 0xffff) 477 return false; 478 479 return val & (1 << 3); 480 } 481 482 483 static inline int ata_id_has_fua(const u16 *id) 484 { 485 if ((id[84] & 0xC000) != 0x4000) 486 return 0; 487 return id[84] & (1 << 6); 488 } 489 490 static inline int ata_id_has_flush(const u16 *id) 491 { 492 if ((id[83] & 0xC000) != 0x4000) 493 return 0; 494 return id[83] & (1 << 12); 495 } 496 497 static inline int ata_id_has_flush_ext(const u16 *id) 498 { 499 if ((id[83] & 0xC000) != 0x4000) 500 return 0; 501 return id[83] & (1 << 13); 502 } 503 504 static inline int ata_id_has_lba48(const u16 *id) 505 { 506 if ((id[83] & 0xC000) != 0x4000) 507 return 0; 508 if (!ata_id_u64(id, 100)) 509 return 0; 510 return id[83] & (1 << 10); 511 } 512 513 static inline int ata_id_hpa_enabled(const u16 *id) 514 { 515 /* Yes children, word 83 valid bits cover word 82 data */ 516 if ((id[83] & 0xC000) != 0x4000) 517 return 0; 518 /* And 87 covers 85-87 */ 519 if ((id[87] & 0xC000) != 0x4000) 520 return 0; 521 /* Check command sets enabled as well as supported */ 522 if ((id[85] & ( 1 << 10)) == 0) 523 return 0; 524 return id[82] & (1 << 10); 525 } 526 527 static inline int ata_id_has_wcache(const u16 *id) 528 { 529 /* Yes children, word 83 valid bits cover word 82 data */ 530 if ((id[83] & 0xC000) != 0x4000) 531 return 0; 532 return id[82] & (1 << 5); 533 } 534 535 static inline int ata_id_has_pm(const u16 *id) 536 { 537 if ((id[83] & 0xC000) != 0x4000) 538 return 0; 539 return id[82] & (1 << 3); 540 } 541 542 static inline int ata_id_rahead_enabled(const u16 *id) 543 { 544 if ((id[87] & 0xC000) != 0x4000) 545 return 0; 546 return id[85] & (1 << 6); 547 } 548 549 static inline int ata_id_wcache_enabled(const u16 *id) 550 { 551 if ((id[87] & 0xC000) != 0x4000) 552 return 0; 553 return id[85] & (1 << 5); 554 } 555 556 /** 557 * ata_id_major_version - get ATA level of drive 558 * @id: Identify data 559 * 560 * Caveats: 561 * ATA-1 considers identify optional 562 * ATA-2 introduces mandatory identify 563 * ATA-3 introduces word 80 and accurate reporting 564 * 565 * The practical impact of this is that ata_id_major_version cannot 566 * reliably report on drives below ATA3. 567 */ 568 569 static inline unsigned int ata_id_major_version(const u16 *id) 570 { 571 unsigned int mver; 572 573 if (id[ATA_ID_MAJOR_VER] == 0xFFFF) 574 return 0; 575 576 for (mver = 14; mver >= 1; mver--) 577 if (id[ATA_ID_MAJOR_VER] & (1 << mver)) 578 break; 579 return mver; 580 } 581 582 static inline int ata_id_is_sata(const u16 *id) 583 { 584 return ata_id_major_version(id) >= 5 && id[93] == 0; 585 } 586 587 static inline int ata_id_has_tpm(const u16 *id) 588 { 589 /* The TPM bits are only valid on ATA8 */ 590 if (ata_id_major_version(id) < 8) 591 return 0; 592 if ((id[48] & 0xC000) != 0x4000) 593 return 0; 594 return id[48] & (1 << 0); 595 } 596 597 static inline int ata_id_has_dword_io(const u16 *id) 598 { 599 /* ATA 8 reuses this flag for "trusted" computing */ 600 if (ata_id_major_version(id) > 7) 601 return 0; 602 if (id[48] & (1 << 0)) 603 return 1; 604 return 0; 605 } 606 607 static inline int ata_id_current_chs_valid(const u16 *id) 608 { 609 /* For ATA-1 devices, if the INITIALIZE DEVICE PARAMETERS command 610 has not been issued to the device then the values of 611 id[54] to id[56] are vendor specific. */ 612 return (id[53] & 0x01) && /* Current translation valid */ 613 id[54] && /* cylinders in current translation */ 614 id[55] && /* heads in current translation */ 615 id[55] <= 16 && 616 id[56]; /* sectors in current translation */ 617 } 618 619 static inline int ata_id_is_cfa(const u16 *id) 620 { 621 u16 v = id[0]; 622 if (v == 0x848A) /* Standard CF */ 623 return 1; 624 /* Could be CF hiding as standard ATA */ 625 if (ata_id_major_version(id) >= 3 && id[82] != 0xFFFF && 626 (id[82] & ( 1 << 2))) 627 return 1; 628 return 0; 629 } 630 631 static inline int ata_drive_40wire(const u16 *dev_id) 632 { 633 if (ata_id_is_sata(dev_id)) 634 return 0; /* SATA */ 635 if ((dev_id[93] & 0xE000) == 0x6000) 636 return 0; /* 80 wire */ 637 return 1; 638 } 639 640 static inline int ata_drive_40wire_relaxed(const u16 *dev_id) 641 { 642 if ((dev_id[93] & 0x2000) == 0x2000) 643 return 0; /* 80 wire */ 644 return 1; 645 } 646 647 static inline int atapi_cdb_len(const u16 *dev_id) 648 { 649 u16 tmp = dev_id[0] & 0x3; 650 switch (tmp) { 651 case 0: return 12; 652 case 1: return 16; 653 default: return -1; 654 } 655 } 656 657 static inline int atapi_command_packet_set(const u16 *dev_id) 658 { 659 return (dev_id[0] >> 8) & 0x1f; 660 } 661 662 static inline int atapi_id_dmadir(const u16 *dev_id) 663 { 664 return ata_id_major_version(dev_id) >= 7 && (dev_id[62] & 0x8000); 665 } 666 667 static inline int is_multi_taskfile(struct ata_taskfile *tf) 668 { 669 return (tf->command == ATA_CMD_READ_MULTI) || 670 (tf->command == ATA_CMD_WRITE_MULTI) || 671 (tf->command == ATA_CMD_READ_MULTI_EXT) || 672 (tf->command == ATA_CMD_WRITE_MULTI_EXT) || 673 (tf->command == ATA_CMD_WRITE_MULTI_FUA_EXT); 674 } 675 676 static inline int ata_ok(u8 status) 677 { 678 return ((status & (ATA_BUSY | ATA_DRDY | ATA_DF | ATA_DRQ | ATA_ERR)) 679 == ATA_DRDY); 680 } 681 682 static inline int lba_28_ok(u64 block, u32 n_block) 683 { 684 /* check the ending block number */ 685 return ((block + n_block - 1) < ((u64)1 << 28)) && (n_block <= 256); 686 } 687 688 static inline int lba_48_ok(u64 block, u32 n_block) 689 { 690 /* check the ending block number */ 691 return ((block + n_block - 1) < ((u64)1 << 48)) && (n_block <= 65536); 692 } 693 694 #define sata_pmp_gscr_vendor(gscr) ((gscr)[SATA_PMP_GSCR_PROD_ID] & 0xffff) 695 #define sata_pmp_gscr_devid(gscr) ((gscr)[SATA_PMP_GSCR_PROD_ID] >> 16) 696 #define sata_pmp_gscr_rev(gscr) (((gscr)[SATA_PMP_GSCR_REV] >> 8) & 0xff) 697 #define sata_pmp_gscr_ports(gscr) ((gscr)[SATA_PMP_GSCR_PORT_INFO] & 0xf) 698 699 #endif /* __LINUX_ATA_H__ */ 700