3 * Copyright 2003-2004 Red Hat, Inc. All rights reserved.
4 * Copyright 2003-2004 Jeff Garzik
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)
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.
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.
22 * libata documentation is available via 'make {ps|pdf}docs',
23 * as Documentation/DocBook/libata.*
25 * Hardware documentation available from http://www.t13.org/
29 #ifndef __LINUX_ATA_H__
30 #define __LINUX_ATA_H__
32 #include <linux/types.h>
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
39 /* various global constants */
40 ATA_MAX_DEVICES = 2, /* per bus/port */
41 ATA_MAX_PRD = 256, /* we could make these 256/256 */
43 ATA_MAX_SECTORS_128 = 128,
44 ATA_MAX_SECTORS = 256,
45 ATA_MAX_SECTORS_LBA48 = 65535,/* TODO: 65536? */
51 ATA_ID_OLD_PIO_MODES = 51,
52 ATA_ID_FIELD_VALID = 53,
53 ATA_ID_MWDMA_MODES = 63,
54 ATA_ID_PIO_MODES = 64,
55 ATA_ID_EIDE_DMA_MIN = 65,
57 ATA_ID_EIDE_PIO_IORDY = 68,
58 ATA_ID_UDMA_MODES = 88,
59 ATA_ID_MAJOR_VER = 80,
60 ATA_ID_PIO4 = (1 << 1),
62 ATA_ID_SERNO_LEN = 20,
63 ATA_ID_FW_REV_LEN = 8,
68 ATA_UDMA1 = ATA_UDMA0 | (1 << 1),
69 ATA_UDMA2 = ATA_UDMA1 | (1 << 2),
70 ATA_UDMA3 = ATA_UDMA2 | (1 << 3),
71 ATA_UDMA4 = ATA_UDMA3 | (1 << 4),
72 ATA_UDMA5 = ATA_UDMA4 | (1 << 5),
73 ATA_UDMA6 = ATA_UDMA5 | (1 << 6),
74 ATA_UDMA7 = ATA_UDMA6 | (1 << 7),
75 /* ATA_UDMA7 is just for completeness... doesn't exist (yet?). */
77 ATA_UDMA_MASK_40C = ATA_UDMA2, /* udma0-2 */
81 ATA_PRD_TBL_SZ = (ATA_MAX_PRD * ATA_PRD_SZ),
82 ATA_PRD_EOT = (1 << 31), /* end-of-table flag */
84 ATA_DMA_TABLE_OFS = 4,
87 ATA_DMA_WR = (1 << 3),
88 ATA_DMA_START = (1 << 0),
89 ATA_DMA_INTR = (1 << 2),
90 ATA_DMA_ERR = (1 << 1),
91 ATA_DMA_ACTIVE = (1 << 0),
93 /* bits in ATA command block registers */
94 ATA_HOB = (1 << 7), /* LBA48 selector */
95 ATA_NIEN = (1 << 1), /* disable-irq flag */
96 ATA_LBA = (1 << 6), /* LBA28 selector */
97 ATA_DEV1 = (1 << 4), /* Select Device 1 (slave) */
98 ATA_DEVICE_OBS = (1 << 7) | (1 << 5), /* obs bits in dev reg */
99 ATA_DEVCTL_OBS = (1 << 3), /* obsolete bit in devctl reg */
100 ATA_BUSY = (1 << 7), /* BSY status bit */
101 ATA_DRDY = (1 << 6), /* device ready */
102 ATA_DF = (1 << 5), /* device fault */
103 ATA_DRQ = (1 << 3), /* data request i/o */
104 ATA_ERR = (1 << 0), /* have an error */
105 ATA_SRST = (1 << 2), /* software reset */
106 ATA_ICRC = (1 << 7), /* interface CRC error */
107 ATA_UNC = (1 << 6), /* uncorrectable media error */
108 ATA_IDNF = (1 << 4), /* ID not found */
109 ATA_ABORTED = (1 << 2), /* command aborted */
111 /* ATA command block registers */
114 ATA_REG_NSECT = 0x02,
118 ATA_REG_DEVICE = 0x06,
119 ATA_REG_STATUS = 0x07,
121 ATA_REG_FEATURE = ATA_REG_ERR, /* and their aliases */
122 ATA_REG_CMD = ATA_REG_STATUS,
123 ATA_REG_BYTEL = ATA_REG_LBAM,
124 ATA_REG_BYTEH = ATA_REG_LBAH,
125 ATA_REG_DEVSEL = ATA_REG_DEVICE,
126 ATA_REG_IRQ = ATA_REG_NSECT,
128 /* ATA device commands */
129 ATA_CMD_CHK_POWER = 0xE5, /* check power mode */
130 ATA_CMD_STANDBY = 0xE2, /* place in standby power mode */
131 ATA_CMD_IDLE = 0xE3, /* place in idle power mode */
132 ATA_CMD_EDD = 0x90, /* execute device diagnostic */
133 ATA_CMD_FLUSH = 0xE7,
134 ATA_CMD_FLUSH_EXT = 0xEA,
135 ATA_CMD_ID_ATA = 0xEC,
136 ATA_CMD_ID_ATAPI = 0xA1,
138 ATA_CMD_READ_EXT = 0x25,
139 ATA_CMD_WRITE = 0xCA,
140 ATA_CMD_WRITE_EXT = 0x35,
141 ATA_CMD_WRITE_FUA_EXT = 0x3D,
142 ATA_CMD_FPDMA_READ = 0x60,
143 ATA_CMD_FPDMA_WRITE = 0x61,
144 ATA_CMD_PIO_READ = 0x20,
145 ATA_CMD_PIO_READ_EXT = 0x24,
146 ATA_CMD_PIO_WRITE = 0x30,
147 ATA_CMD_PIO_WRITE_EXT = 0x34,
148 ATA_CMD_READ_MULTI = 0xC4,
149 ATA_CMD_READ_MULTI_EXT = 0x29,
150 ATA_CMD_WRITE_MULTI = 0xC5,
151 ATA_CMD_WRITE_MULTI_EXT = 0x39,
152 ATA_CMD_WRITE_MULTI_FUA_EXT = 0xCE,
153 ATA_CMD_SET_FEATURES = 0xEF,
154 ATA_CMD_PACKET = 0xA0,
155 ATA_CMD_VERIFY = 0x40,
156 ATA_CMD_VERIFY_EXT = 0x42,
157 ATA_CMD_STANDBYNOW1 = 0xE0,
158 ATA_CMD_IDLEIMMEDIATE = 0xE1,
159 ATA_CMD_INIT_DEV_PARAMS = 0x91,
160 ATA_CMD_READ_NATIVE_MAX = 0xF8,
161 ATA_CMD_READ_NATIVE_MAX_EXT = 0x27,
162 ATA_CMD_READ_LOG_EXT = 0x2f,
164 /* READ_LOG_EXT pages */
165 ATA_LOG_SATA_NCQ = 0x10,
167 /* SETFEATURES stuff */
168 SETFEATURES_XFER = 0x03,
177 XFER_MW_DMA_4 = 0x24, /* CFA only */
178 XFER_MW_DMA_3 = 0x23, /* CFA only */
179 XFER_MW_DMA_2 = 0x22,
180 XFER_MW_DMA_1 = 0x21,
181 XFER_MW_DMA_0 = 0x20,
182 XFER_SW_DMA_2 = 0x12,
183 XFER_SW_DMA_1 = 0x11,
184 XFER_SW_DMA_0 = 0x10,
185 XFER_PIO_6 = 0x0E, /* CFA only */
186 XFER_PIO_5 = 0x0D, /* CFA only */
192 XFER_PIO_SLOW = 0x00,
194 SETFEATURES_WC_ON = 0x02, /* Enable write cache */
195 SETFEATURES_WC_OFF = 0x82, /* Disable write cache */
198 ATAPI_PKT_DMA = (1 << 0),
199 ATAPI_DMADIR = (1 << 2), /* ATAPI data dir:
200 0=to device, 1=to host */
207 ATA_CBL_PATA40_SHORT = 3, /* 40 wire cable to high UDMA spec */
208 ATA_CBL_PATA_UNK = 4,
211 /* SATA Status and Control Registers */
216 SCR_NOTIFICATION = 4,
219 SERR_DATA_RECOVERED = (1 << 0), /* recovered data error */
220 SERR_COMM_RECOVERED = (1 << 1), /* recovered comm failure */
221 SERR_DATA = (1 << 8), /* unrecovered data error */
222 SERR_PERSISTENT = (1 << 9), /* persistent data/comm error */
223 SERR_PROTOCOL = (1 << 10), /* protocol violation */
224 SERR_INTERNAL = (1 << 11), /* host internal error */
225 SERR_PHYRDY_CHG = (1 << 16), /* PHY RDY changed */
226 SERR_DEV_XCHG = (1 << 26), /* device exchanged */
228 /* struct ata_taskfile flags */
229 ATA_TFLAG_LBA48 = (1 << 0), /* enable 48-bit LBA and "HOB" */
230 ATA_TFLAG_ISADDR = (1 << 1), /* enable r/w to nsect/lba regs */
231 ATA_TFLAG_DEVICE = (1 << 2), /* enable r/w to device reg */
232 ATA_TFLAG_WRITE = (1 << 3), /* data dir: host->dev==1 (write) */
233 ATA_TFLAG_LBA = (1 << 4), /* enable LBA */
234 ATA_TFLAG_FUA = (1 << 5), /* enable FUA */
235 ATA_TFLAG_POLLING = (1 << 6), /* set nIEN to 1 and use polling */
238 enum ata_tf_protocols {
239 /* ATA taskfile protocols */
240 ATA_PROT_UNKNOWN, /* unknown/invalid */
241 ATA_PROT_NODATA, /* no data */
242 ATA_PROT_PIO, /* PIO single sector */
243 ATA_PROT_DMA, /* DMA */
244 ATA_PROT_NCQ, /* NCQ */
245 ATA_PROT_ATAPI, /* packet command, PIO data xfer*/
246 ATA_PROT_ATAPI_NODATA, /* packet command, no data */
247 ATA_PROT_ATAPI_DMA, /* packet command with special DMA sauce */
251 ATA_IOC_GET_IO32 = 0x309,
252 ATA_IOC_SET_IO32 = 0x324,
255 /* core structures */
262 struct ata_taskfile {
263 unsigned long flags; /* ATA_TFLAG_xxx */
264 u8 protocol; /* ATA_PROT_xxx */
266 u8 ctl; /* control reg */
268 u8 hob_feature; /* additional data */
269 u8 hob_nsect; /* to support LBA48 */
282 u8 command; /* IO operation */
285 #define ata_id_is_ata(id) (((id)[0] & (1 << 15)) == 0)
286 #define ata_id_rahead_enabled(id) ((id)[85] & (1 << 6))
287 #define ata_id_wcache_enabled(id) ((id)[85] & (1 << 5))
288 #define ata_id_hpa_enabled(id) ((id)[85] & (1 << 10))
289 #define ata_id_has_fua(id) ((id)[84] & (1 << 6))
290 #define ata_id_has_flush(id) ((id)[83] & (1 << 12))
291 #define ata_id_has_flush_ext(id) ((id)[83] & (1 << 13))
292 #define ata_id_has_lba48(id) ((id)[83] & (1 << 10))
293 #define ata_id_has_hpa(id) ((id)[82] & (1 << 10))
294 #define ata_id_has_wcache(id) ((id)[82] & (1 << 5))
295 #define ata_id_has_pm(id) ((id)[82] & (1 << 3))
296 #define ata_id_has_lba(id) ((id)[49] & (1 << 9))
297 #define ata_id_has_dma(id) ((id)[49] & (1 << 8))
298 #define ata_id_has_ncq(id) ((id)[76] & (1 << 8))
299 #define ata_id_queue_depth(id) (((id)[75] & 0x1f) + 1)
300 #define ata_id_removeable(id) ((id)[0] & (1 << 7))
301 #define ata_id_has_dword_io(id) ((id)[50] & (1 << 0))
302 #define ata_id_iordy_disable(id) ((id)[49] & (1 << 10))
303 #define ata_id_has_iordy(id) ((id)[49] & (1 << 9))
304 #define ata_id_u32(id,n) \
305 (((u32) (id)[(n) + 1] << 16) | ((u32) (id)[(n)]))
306 #define ata_id_u64(id,n) \
307 ( ((u64) (id)[(n) + 3] << 48) | \
308 ((u64) (id)[(n) + 2] << 32) | \
309 ((u64) (id)[(n) + 1] << 16) | \
310 ((u64) (id)[(n) + 0]) )
312 #define ata_id_cdb_intr(id) (((id)[0] & 0x60) == 0x20)
314 static inline unsigned int ata_id_major_version(const u16 *id)
318 if (id[ATA_ID_MAJOR_VER] == 0xFFFF)
321 for (mver = 14; mver >= 1; mver--)
322 if (id[ATA_ID_MAJOR_VER] & (1 << mver))
327 static inline int ata_id_is_sata(const u16 *id)
329 return ata_id_major_version(id) >= 5 && id[93] == 0;
332 static inline int ata_id_current_chs_valid(const u16 *id)
334 /* For ATA-1 devices, if the INITIALIZE DEVICE PARAMETERS command
335 has not been issued to the device then the values of
336 id[54] to id[56] are vendor specific. */
337 return (id[53] & 0x01) && /* Current translation valid */
338 id[54] && /* cylinders in current translation */
339 id[55] && /* heads in current translation */
341 id[56]; /* sectors in current translation */
344 static inline int ata_id_is_cfa(const u16 *id)
347 if (v == 0x848A) /* Standard CF */
349 /* Could be CF hiding as standard ATA */
350 if (ata_id_major_version(id) >= 3 && id[82] != 0xFFFF &&
351 (id[82] & ( 1 << 2)))
356 static inline int ata_drive_40wire(const u16 *dev_id)
358 if (ata_id_is_sata(dev_id))
360 if ((dev_id[93] & 0xE000) == 0x6000)
361 return 0; /* 80 wire */
365 static inline int atapi_cdb_len(const u16 *dev_id)
367 u16 tmp = dev_id[0] & 0x3;
375 static inline int is_atapi_taskfile(const struct ata_taskfile *tf)
377 return (tf->protocol == ATA_PROT_ATAPI) ||
378 (tf->protocol == ATA_PROT_ATAPI_NODATA) ||
379 (tf->protocol == ATA_PROT_ATAPI_DMA);
382 static inline int is_multi_taskfile(struct ata_taskfile *tf)
384 return (tf->command == ATA_CMD_READ_MULTI) ||
385 (tf->command == ATA_CMD_WRITE_MULTI) ||
386 (tf->command == ATA_CMD_READ_MULTI_EXT) ||
387 (tf->command == ATA_CMD_WRITE_MULTI_EXT) ||
388 (tf->command == ATA_CMD_WRITE_MULTI_FUA_EXT);
391 static inline int ata_ok(u8 status)
393 return ((status & (ATA_BUSY | ATA_DRDY | ATA_DF | ATA_DRQ | ATA_ERR))
397 static inline int lba_28_ok(u64 block, u32 n_block)
399 /* check the ending block number */
400 return ((block + n_block - 1) < ((u64)1 << 28)) && (n_block <= 256);
403 static inline int lba_48_ok(u64 block, u32 n_block)
405 /* check the ending block number */
406 return ((block + n_block - 1) < ((u64)1 << 48)) && (n_block <= 65536);
409 #endif /* __LINUX_ATA_H__ */