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 = 256, 44 ATA_MAX_SECTORS_LBA48 = 65535,/* TODO: 65536? */ 45 46 ATA_ID_WORDS = 256, 47 ATA_ID_SERNO_OFS = 10, 48 ATA_ID_FW_REV_OFS = 23, 49 ATA_ID_PROD_OFS = 27, 50 ATA_ID_OLD_PIO_MODES = 51, 51 ATA_ID_FIELD_VALID = 53, 52 ATA_ID_MWDMA_MODES = 63, 53 ATA_ID_PIO_MODES = 64, 54 ATA_ID_EIDE_DMA_MIN = 65, 55 ATA_ID_EIDE_PIO = 67, 56 ATA_ID_EIDE_PIO_IORDY = 68, 57 ATA_ID_UDMA_MODES = 88, 58 ATA_ID_MAJOR_VER = 80, 59 ATA_ID_PIO4 = (1 << 1), 60 61 ATA_PCI_CTL_OFS = 2, 62 ATA_SERNO_LEN = 20, 63 ATA_UDMA0 = (1 << 0), 64 ATA_UDMA1 = ATA_UDMA0 | (1 << 1), 65 ATA_UDMA2 = ATA_UDMA1 | (1 << 2), 66 ATA_UDMA3 = ATA_UDMA2 | (1 << 3), 67 ATA_UDMA4 = ATA_UDMA3 | (1 << 4), 68 ATA_UDMA5 = ATA_UDMA4 | (1 << 5), 69 ATA_UDMA6 = ATA_UDMA5 | (1 << 6), 70 ATA_UDMA7 = ATA_UDMA6 | (1 << 7), 71 /* ATA_UDMA7 is just for completeness... doesn't exist (yet?). */ 72 73 ATA_UDMA_MASK_40C = ATA_UDMA2, /* udma0-2 */ 74 75 /* DMA-related */ 76 ATA_PRD_SZ = 8, 77 ATA_PRD_TBL_SZ = (ATA_MAX_PRD * ATA_PRD_SZ), 78 ATA_PRD_EOT = (1 << 31), /* end-of-table flag */ 79 80 ATA_DMA_TABLE_OFS = 4, 81 ATA_DMA_STATUS = 2, 82 ATA_DMA_CMD = 0, 83 ATA_DMA_WR = (1 << 3), 84 ATA_DMA_START = (1 << 0), 85 ATA_DMA_INTR = (1 << 2), 86 ATA_DMA_ERR = (1 << 1), 87 ATA_DMA_ACTIVE = (1 << 0), 88 89 /* bits in ATA command block registers */ 90 ATA_HOB = (1 << 7), /* LBA48 selector */ 91 ATA_NIEN = (1 << 1), /* disable-irq flag */ 92 ATA_LBA = (1 << 6), /* LBA28 selector */ 93 ATA_DEV1 = (1 << 4), /* Select Device 1 (slave) */ 94 ATA_DEVICE_OBS = (1 << 7) | (1 << 5), /* obs bits in dev reg */ 95 ATA_DEVCTL_OBS = (1 << 3), /* obsolete bit in devctl reg */ 96 ATA_BUSY = (1 << 7), /* BSY status bit */ 97 ATA_DRDY = (1 << 6), /* device ready */ 98 ATA_DF = (1 << 5), /* device fault */ 99 ATA_DRQ = (1 << 3), /* data request i/o */ 100 ATA_ERR = (1 << 0), /* have an error */ 101 ATA_SRST = (1 << 2), /* software reset */ 102 ATA_ICRC = (1 << 7), /* interface CRC error */ 103 ATA_UNC = (1 << 6), /* uncorrectable media error */ 104 ATA_IDNF = (1 << 4), /* ID not found */ 105 ATA_ABORTED = (1 << 2), /* command aborted */ 106 107 /* ATA command block registers */ 108 ATA_REG_DATA = 0x00, 109 ATA_REG_ERR = 0x01, 110 ATA_REG_NSECT = 0x02, 111 ATA_REG_LBAL = 0x03, 112 ATA_REG_LBAM = 0x04, 113 ATA_REG_LBAH = 0x05, 114 ATA_REG_DEVICE = 0x06, 115 ATA_REG_STATUS = 0x07, 116 117 ATA_REG_FEATURE = ATA_REG_ERR, /* and their aliases */ 118 ATA_REG_CMD = ATA_REG_STATUS, 119 ATA_REG_BYTEL = ATA_REG_LBAM, 120 ATA_REG_BYTEH = ATA_REG_LBAH, 121 ATA_REG_DEVSEL = ATA_REG_DEVICE, 122 ATA_REG_IRQ = ATA_REG_NSECT, 123 124 /* ATA device commands */ 125 ATA_CMD_CHK_POWER = 0xE5, /* check power mode */ 126 ATA_CMD_STANDBY = 0xE2, /* place in standby power mode */ 127 ATA_CMD_IDLE = 0xE3, /* place in idle power mode */ 128 ATA_CMD_EDD = 0x90, /* execute device diagnostic */ 129 ATA_CMD_FLUSH = 0xE7, 130 ATA_CMD_FLUSH_EXT = 0xEA, 131 ATA_CMD_ID_ATA = 0xEC, 132 ATA_CMD_ID_ATAPI = 0xA1, 133 ATA_CMD_READ = 0xC8, 134 ATA_CMD_READ_EXT = 0x25, 135 ATA_CMD_WRITE = 0xCA, 136 ATA_CMD_WRITE_EXT = 0x35, 137 ATA_CMD_WRITE_FUA_EXT = 0x3D, 138 ATA_CMD_FPDMA_READ = 0x60, 139 ATA_CMD_FPDMA_WRITE = 0x61, 140 ATA_CMD_PIO_READ = 0x20, 141 ATA_CMD_PIO_READ_EXT = 0x24, 142 ATA_CMD_PIO_WRITE = 0x30, 143 ATA_CMD_PIO_WRITE_EXT = 0x34, 144 ATA_CMD_READ_MULTI = 0xC4, 145 ATA_CMD_READ_MULTI_EXT = 0x29, 146 ATA_CMD_WRITE_MULTI = 0xC5, 147 ATA_CMD_WRITE_MULTI_EXT = 0x39, 148 ATA_CMD_WRITE_MULTI_FUA_EXT = 0xCE, 149 ATA_CMD_SET_FEATURES = 0xEF, 150 ATA_CMD_PACKET = 0xA0, 151 ATA_CMD_VERIFY = 0x40, 152 ATA_CMD_VERIFY_EXT = 0x42, 153 ATA_CMD_STANDBYNOW1 = 0xE0, 154 ATA_CMD_IDLEIMMEDIATE = 0xE1, 155 ATA_CMD_INIT_DEV_PARAMS = 0x91, 156 ATA_CMD_READ_NATIVE_MAX = 0xF8, 157 ATA_CMD_READ_NATIVE_MAX_EXT = 0x27, 158 ATA_CMD_READ_LOG_EXT = 0x2f, 159 160 /* READ_LOG_EXT pages */ 161 ATA_LOG_SATA_NCQ = 0x10, 162 163 /* SETFEATURES stuff */ 164 SETFEATURES_XFER = 0x03, 165 XFER_UDMA_7 = 0x47, 166 XFER_UDMA_6 = 0x46, 167 XFER_UDMA_5 = 0x45, 168 XFER_UDMA_4 = 0x44, 169 XFER_UDMA_3 = 0x43, 170 XFER_UDMA_2 = 0x42, 171 XFER_UDMA_1 = 0x41, 172 XFER_UDMA_0 = 0x40, 173 XFER_MW_DMA_4 = 0x24, /* CFA only */ 174 XFER_MW_DMA_3 = 0x23, /* CFA only */ 175 XFER_MW_DMA_2 = 0x22, 176 XFER_MW_DMA_1 = 0x21, 177 XFER_MW_DMA_0 = 0x20, 178 XFER_SW_DMA_2 = 0x12, 179 XFER_SW_DMA_1 = 0x11, 180 XFER_SW_DMA_0 = 0x10, 181 XFER_PIO_6 = 0x0E, /* CFA only */ 182 XFER_PIO_5 = 0x0D, /* CFA only */ 183 XFER_PIO_4 = 0x0C, 184 XFER_PIO_3 = 0x0B, 185 XFER_PIO_2 = 0x0A, 186 XFER_PIO_1 = 0x09, 187 XFER_PIO_0 = 0x08, 188 XFER_PIO_SLOW = 0x00, 189 190 SETFEATURES_WC_ON = 0x02, /* Enable write cache */ 191 SETFEATURES_WC_OFF = 0x82, /* Disable write cache */ 192 193 /* ATAPI stuff */ 194 ATAPI_PKT_DMA = (1 << 0), 195 ATAPI_DMADIR = (1 << 2), /* ATAPI data dir: 196 0=to device, 1=to host */ 197 ATAPI_CDB_LEN = 16, 198 199 /* cable types */ 200 ATA_CBL_NONE = 0, 201 ATA_CBL_PATA40 = 1, 202 ATA_CBL_PATA80 = 2, 203 ATA_CBL_PATA40_SHORT = 3, /* 40 wire cable to high UDMA spec */ 204 ATA_CBL_PATA_UNK = 4, 205 ATA_CBL_SATA = 5, 206 207 /* SATA Status and Control Registers */ 208 SCR_STATUS = 0, 209 SCR_ERROR = 1, 210 SCR_CONTROL = 2, 211 SCR_ACTIVE = 3, 212 SCR_NOTIFICATION = 4, 213 214 /* SError bits */ 215 SERR_DATA_RECOVERED = (1 << 0), /* recovered data error */ 216 SERR_COMM_RECOVERED = (1 << 1), /* recovered comm failure */ 217 SERR_DATA = (1 << 8), /* unrecovered data error */ 218 SERR_PERSISTENT = (1 << 9), /* persistent data/comm error */ 219 SERR_PROTOCOL = (1 << 10), /* protocol violation */ 220 SERR_INTERNAL = (1 << 11), /* host internal error */ 221 SERR_PHYRDY_CHG = (1 << 16), /* PHY RDY changed */ 222 SERR_DEV_XCHG = (1 << 26), /* device exchanged */ 223 224 /* struct ata_taskfile flags */ 225 ATA_TFLAG_LBA48 = (1 << 0), /* enable 48-bit LBA and "HOB" */ 226 ATA_TFLAG_ISADDR = (1 << 1), /* enable r/w to nsect/lba regs */ 227 ATA_TFLAG_DEVICE = (1 << 2), /* enable r/w to device reg */ 228 ATA_TFLAG_WRITE = (1 << 3), /* data dir: host->dev==1 (write) */ 229 ATA_TFLAG_LBA = (1 << 4), /* enable LBA */ 230 ATA_TFLAG_FUA = (1 << 5), /* enable FUA */ 231 ATA_TFLAG_POLLING = (1 << 6), /* set nIEN to 1 and use polling */ 232 }; 233 234 enum ata_tf_protocols { 235 /* ATA taskfile protocols */ 236 ATA_PROT_UNKNOWN, /* unknown/invalid */ 237 ATA_PROT_NODATA, /* no data */ 238 ATA_PROT_PIO, /* PIO single sector */ 239 ATA_PROT_DMA, /* DMA */ 240 ATA_PROT_NCQ, /* NCQ */ 241 ATA_PROT_ATAPI, /* packet command, PIO data xfer*/ 242 ATA_PROT_ATAPI_NODATA, /* packet command, no data */ 243 ATA_PROT_ATAPI_DMA, /* packet command with special DMA sauce */ 244 }; 245 246 enum ata_ioctls { 247 ATA_IOC_GET_IO32 = 0x309, 248 ATA_IOC_SET_IO32 = 0x324, 249 }; 250 251 /* core structures */ 252 253 struct ata_prd { 254 u32 addr; 255 u32 flags_len; 256 }; 257 258 struct ata_taskfile { 259 unsigned long flags; /* ATA_TFLAG_xxx */ 260 u8 protocol; /* ATA_PROT_xxx */ 261 262 u8 ctl; /* control reg */ 263 264 u8 hob_feature; /* additional data */ 265 u8 hob_nsect; /* to support LBA48 */ 266 u8 hob_lbal; 267 u8 hob_lbam; 268 u8 hob_lbah; 269 270 u8 feature; 271 u8 nsect; 272 u8 lbal; 273 u8 lbam; 274 u8 lbah; 275 276 u8 device; 277 278 u8 command; /* IO operation */ 279 }; 280 281 #define ata_id_is_ata(id) (((id)[0] & (1 << 15)) == 0) 282 #define ata_id_is_sata(id) ((id)[93] == 0) 283 #define ata_id_rahead_enabled(id) ((id)[85] & (1 << 6)) 284 #define ata_id_wcache_enabled(id) ((id)[85] & (1 << 5)) 285 #define ata_id_hpa_enabled(id) ((id)[85] & (1 << 10)) 286 #define ata_id_has_fua(id) ((id)[84] & (1 << 6)) 287 #define ata_id_has_flush(id) ((id)[83] & (1 << 12)) 288 #define ata_id_has_flush_ext(id) ((id)[83] & (1 << 13)) 289 #define ata_id_has_lba48(id) ((id)[83] & (1 << 10)) 290 #define ata_id_has_hpa(id) ((id)[82] & (1 << 10)) 291 #define ata_id_has_wcache(id) ((id)[82] & (1 << 5)) 292 #define ata_id_has_pm(id) ((id)[82] & (1 << 3)) 293 #define ata_id_has_lba(id) ((id)[49] & (1 << 9)) 294 #define ata_id_has_dma(id) ((id)[49] & (1 << 8)) 295 #define ata_id_has_ncq(id) ((id)[76] & (1 << 8)) 296 #define ata_id_queue_depth(id) (((id)[75] & 0x1f) + 1) 297 #define ata_id_removeable(id) ((id)[0] & (1 << 7)) 298 #define ata_id_has_dword_io(id) ((id)[50] & (1 << 0)) 299 #define ata_id_u32(id,n) \ 300 (((u32) (id)[(n) + 1] << 16) | ((u32) (id)[(n)])) 301 #define ata_id_u64(id,n) \ 302 ( ((u64) (id)[(n) + 3] << 48) | \ 303 ((u64) (id)[(n) + 2] << 32) | \ 304 ((u64) (id)[(n) + 1] << 16) | \ 305 ((u64) (id)[(n) + 0]) ) 306 307 #define ata_id_cdb_intr(id) (((id)[0] & 0x60) == 0x20) 308 309 static inline unsigned int ata_id_major_version(const u16 *id) 310 { 311 unsigned int mver; 312 313 if (id[ATA_ID_MAJOR_VER] == 0xFFFF) 314 return 0; 315 316 for (mver = 14; mver >= 1; mver--) 317 if (id[ATA_ID_MAJOR_VER] & (1 << mver)) 318 break; 319 return mver; 320 } 321 322 static inline int ata_id_current_chs_valid(const u16 *id) 323 { 324 /* For ATA-1 devices, if the INITIALIZE DEVICE PARAMETERS command 325 has not been issued to the device then the values of 326 id[54] to id[56] are vendor specific. */ 327 return (id[53] & 0x01) && /* Current translation valid */ 328 id[54] && /* cylinders in current translation */ 329 id[55] && /* heads in current translation */ 330 id[55] <= 16 && 331 id[56]; /* sectors in current translation */ 332 } 333 334 static inline int ata_id_is_cfa(const u16 *id) 335 { 336 u16 v = id[0]; 337 if (v == 0x848A) /* Standard CF */ 338 return 1; 339 /* Could be CF hiding as standard ATA */ 340 if (ata_id_major_version(id) >= 3 && id[82] != 0xFFFF && 341 (id[82] & ( 1 << 2))) 342 return 1; 343 return 0; 344 } 345 346 static inline int ata_drive_40wire(const u16 *dev_id) 347 { 348 if (ata_id_major_version(dev_id) >= 5 && ata_id_is_sata(dev_id)) 349 return 0; /* SATA */ 350 if (dev_id[93] & 0x4000) 351 return 0; /* 80 wire */ 352 return 1; 353 } 354 355 static inline int atapi_cdb_len(const u16 *dev_id) 356 { 357 u16 tmp = dev_id[0] & 0x3; 358 switch (tmp) { 359 case 0: return 12; 360 case 1: return 16; 361 default: return -1; 362 } 363 } 364 365 static inline int is_atapi_taskfile(const struct ata_taskfile *tf) 366 { 367 return (tf->protocol == ATA_PROT_ATAPI) || 368 (tf->protocol == ATA_PROT_ATAPI_NODATA) || 369 (tf->protocol == ATA_PROT_ATAPI_DMA); 370 } 371 372 static inline int is_multi_taskfile(struct ata_taskfile *tf) 373 { 374 return (tf->command == ATA_CMD_READ_MULTI) || 375 (tf->command == ATA_CMD_WRITE_MULTI) || 376 (tf->command == ATA_CMD_READ_MULTI_EXT) || 377 (tf->command == ATA_CMD_WRITE_MULTI_EXT) || 378 (tf->command == ATA_CMD_WRITE_MULTI_FUA_EXT); 379 } 380 381 static inline int ata_ok(u8 status) 382 { 383 return ((status & (ATA_BUSY | ATA_DRDY | ATA_DF | ATA_DRQ | ATA_ERR)) 384 == ATA_DRDY); 385 } 386 387 static inline int lba_28_ok(u64 block, u32 n_block) 388 { 389 /* check the ending block number */ 390 return ((block + n_block - 1) < ((u64)1 << 28)) && (n_block <= 256); 391 } 392 393 static inline int lba_48_ok(u64 block, u32 n_block) 394 { 395 /* check the ending block number */ 396 return ((block + n_block - 1) < ((u64)1 << 48)) && (n_block <= 65536); 397 } 398 399 #endif /* __LINUX_ATA_H__ */ 400