Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
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
38enum {
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
44 ATA_ID_WORDS = 256,
45 ATA_ID_SERNO_OFS = 10,
46 ATA_ID_FW_REV_OFS = 23,
47 ATA_ID_PROD_OFS = 27,
48 ATA_ID_OLD_PIO_MODES = 51,
49 ATA_ID_FIELD_VALID = 53,
50 ATA_ID_MWDMA_MODES = 63,
51 ATA_ID_PIO_MODES = 64,
52 ATA_ID_EIDE_DMA_MIN = 65,
53 ATA_ID_EIDE_PIO = 67,
54 ATA_ID_EIDE_PIO_IORDY = 68,
55 ATA_ID_UDMA_MODES = 88,
56 ATA_ID_MAJOR_VER = 80,
57 ATA_ID_PIO4 = (1 << 1),
58
59 ATA_PCI_CTL_OFS = 2,
60 ATA_SERNO_LEN = 20,
61 ATA_UDMA0 = (1 << 0),
62 ATA_UDMA1 = ATA_UDMA0 | (1 << 1),
63 ATA_UDMA2 = ATA_UDMA1 | (1 << 2),
64 ATA_UDMA3 = ATA_UDMA2 | (1 << 3),
65 ATA_UDMA4 = ATA_UDMA3 | (1 << 4),
66 ATA_UDMA5 = ATA_UDMA4 | (1 << 5),
67 ATA_UDMA6 = ATA_UDMA5 | (1 << 6),
68 ATA_UDMA7 = ATA_UDMA6 | (1 << 7),
69 /* ATA_UDMA7 is just for completeness... doesn't exist (yet?). */
70
71 ATA_UDMA_MASK_40C = ATA_UDMA2, /* udma0-2 */
72
73 /* DMA-related */
74 ATA_PRD_SZ = 8,
75 ATA_PRD_TBL_SZ = (ATA_MAX_PRD * ATA_PRD_SZ),
76 ATA_PRD_EOT = (1 << 31), /* end-of-table flag */
77
78 ATA_DMA_TABLE_OFS = 4,
79 ATA_DMA_STATUS = 2,
80 ATA_DMA_CMD = 0,
81 ATA_DMA_WR = (1 << 3),
82 ATA_DMA_START = (1 << 0),
83 ATA_DMA_INTR = (1 << 2),
84 ATA_DMA_ERR = (1 << 1),
85 ATA_DMA_ACTIVE = (1 << 0),
86
87 /* bits in ATA command block registers */
88 ATA_HOB = (1 << 7), /* LBA48 selector */
89 ATA_NIEN = (1 << 1), /* disable-irq flag */
90 ATA_LBA = (1 << 6), /* LBA28 selector */
91 ATA_DEV1 = (1 << 4), /* Select Device 1 (slave) */
92 ATA_DEVICE_OBS = (1 << 7) | (1 << 5), /* obs bits in dev reg */
93 ATA_DEVCTL_OBS = (1 << 3), /* obsolete bit in devctl reg */
94 ATA_BUSY = (1 << 7), /* BSY status bit */
95 ATA_DRDY = (1 << 6), /* device ready */
96 ATA_DF = (1 << 5), /* device fault */
97 ATA_DRQ = (1 << 3), /* data request i/o */
98 ATA_ERR = (1 << 0), /* have an error */
99 ATA_SRST = (1 << 2), /* software reset */
100 ATA_ABORTED = (1 << 2), /* command aborted */
101
102 /* ATA command block registers */
103 ATA_REG_DATA = 0x00,
104 ATA_REG_ERR = 0x01,
105 ATA_REG_NSECT = 0x02,
106 ATA_REG_LBAL = 0x03,
107 ATA_REG_LBAM = 0x04,
108 ATA_REG_LBAH = 0x05,
109 ATA_REG_DEVICE = 0x06,
110 ATA_REG_STATUS = 0x07,
111
112 ATA_REG_FEATURE = ATA_REG_ERR, /* and their aliases */
113 ATA_REG_CMD = ATA_REG_STATUS,
114 ATA_REG_BYTEL = ATA_REG_LBAM,
115 ATA_REG_BYTEH = ATA_REG_LBAH,
116 ATA_REG_DEVSEL = ATA_REG_DEVICE,
117 ATA_REG_IRQ = ATA_REG_NSECT,
118
119 /* ATA device commands */
120 ATA_CMD_CHK_POWER = 0xE5, /* check power mode */
121 ATA_CMD_STANDBY = 0xE2, /* place in standby power mode */
122 ATA_CMD_IDLE = 0xE3, /* place in idle power mode */
123 ATA_CMD_EDD = 0x90, /* execute device diagnostic */
124 ATA_CMD_FLUSH = 0xE7,
125 ATA_CMD_FLUSH_EXT = 0xEA,
126 ATA_CMD_ID_ATA = 0xEC,
127 ATA_CMD_ID_ATAPI = 0xA1,
128 ATA_CMD_READ = 0xC8,
129 ATA_CMD_READ_EXT = 0x25,
130 ATA_CMD_WRITE = 0xCA,
131 ATA_CMD_WRITE_EXT = 0x35,
132 ATA_CMD_WRITE_FUA_EXT = 0x3D,
133 ATA_CMD_PIO_READ = 0x20,
134 ATA_CMD_PIO_READ_EXT = 0x24,
135 ATA_CMD_PIO_WRITE = 0x30,
136 ATA_CMD_PIO_WRITE_EXT = 0x34,
137 ATA_CMD_READ_MULTI = 0xC4,
138 ATA_CMD_READ_MULTI_EXT = 0x29,
139 ATA_CMD_WRITE_MULTI = 0xC5,
140 ATA_CMD_WRITE_MULTI_EXT = 0x39,
141 ATA_CMD_WRITE_MULTI_FUA_EXT = 0xCE,
142 ATA_CMD_SET_FEATURES = 0xEF,
143 ATA_CMD_PACKET = 0xA0,
144 ATA_CMD_VERIFY = 0x40,
145 ATA_CMD_VERIFY_EXT = 0x42,
146 ATA_CMD_STANDBYNOW1 = 0xE0,
147 ATA_CMD_IDLEIMMEDIATE = 0xE1,
148 ATA_CMD_INIT_DEV_PARAMS = 0x91,
149 ATA_CMD_READ_NATIVE_MAX = 0xF8,
150 ATA_CMD_READ_NATIVE_MAX_EXT = 0x27,
151
152 /* SETFEATURES stuff */
153 SETFEATURES_XFER = 0x03,
154 XFER_UDMA_7 = 0x47,
155 XFER_UDMA_6 = 0x46,
156 XFER_UDMA_5 = 0x45,
157 XFER_UDMA_4 = 0x44,
158 XFER_UDMA_3 = 0x43,
159 XFER_UDMA_2 = 0x42,
160 XFER_UDMA_1 = 0x41,
161 XFER_UDMA_0 = 0x40,
162 XFER_MW_DMA_2 = 0x22,
163 XFER_MW_DMA_1 = 0x21,
164 XFER_MW_DMA_0 = 0x20,
165 XFER_SW_DMA_2 = 0x12,
166 XFER_SW_DMA_1 = 0x11,
167 XFER_SW_DMA_0 = 0x10,
168 XFER_PIO_4 = 0x0C,
169 XFER_PIO_3 = 0x0B,
170 XFER_PIO_2 = 0x0A,
171 XFER_PIO_1 = 0x09,
172 XFER_PIO_0 = 0x08,
173 XFER_PIO_SLOW = 0x00,
174
175 /* ATAPI stuff */
176 ATAPI_PKT_DMA = (1 << 0),
177 ATAPI_DMADIR = (1 << 2), /* ATAPI data dir:
178 0=to device, 1=to host */
179 ATAPI_CDB_LEN = 16,
180
181 /* cable types */
182 ATA_CBL_NONE = 0,
183 ATA_CBL_PATA40 = 1,
184 ATA_CBL_PATA80 = 2,
185 ATA_CBL_PATA_UNK = 3,
186 ATA_CBL_SATA = 4,
187
188 /* SATA Status and Control Registers */
189 SCR_STATUS = 0,
190 SCR_ERROR = 1,
191 SCR_CONTROL = 2,
192 SCR_ACTIVE = 3,
193 SCR_NOTIFICATION = 4,
194
195 /* struct ata_taskfile flags */
196 ATA_TFLAG_LBA48 = (1 << 0), /* enable 48-bit LBA and "HOB" */
197 ATA_TFLAG_ISADDR = (1 << 1), /* enable r/w to nsect/lba regs */
198 ATA_TFLAG_DEVICE = (1 << 2), /* enable r/w to device reg */
199 ATA_TFLAG_WRITE = (1 << 3), /* data dir: host->dev==1 (write) */
200 ATA_TFLAG_LBA = (1 << 4), /* enable LBA */
201 ATA_TFLAG_FUA = (1 << 5), /* enable FUA */
202};
203
204enum ata_tf_protocols {
205 /* ATA taskfile protocols */
206 ATA_PROT_UNKNOWN, /* unknown/invalid */
207 ATA_PROT_NODATA, /* no data */
208 ATA_PROT_PIO, /* PIO single sector */
209 ATA_PROT_DMA, /* DMA */
210 ATA_PROT_ATAPI, /* packet command, PIO data xfer*/
211 ATA_PROT_ATAPI_NODATA, /* packet command, no data */
212 ATA_PROT_ATAPI_DMA, /* packet command with special DMA sauce */
213};
214
215enum ata_ioctls {
216 ATA_IOC_GET_IO32 = 0x309,
217 ATA_IOC_SET_IO32 = 0x324,
218};
219
220/* core structures */
221
222struct ata_prd {
223 u32 addr;
224 u32 flags_len;
225};
226
227struct ata_taskfile {
228 unsigned long flags; /* ATA_TFLAG_xxx */
229 u8 protocol; /* ATA_PROT_xxx */
230
231 u8 ctl; /* control reg */
232
233 u8 hob_feature; /* additional data */
234 u8 hob_nsect; /* to support LBA48 */
235 u8 hob_lbal;
236 u8 hob_lbam;
237 u8 hob_lbah;
238
239 u8 feature;
240 u8 nsect;
241 u8 lbal;
242 u8 lbam;
243 u8 lbah;
244
245 u8 device;
246
247 u8 command; /* IO operation */
248};
249
250#define ata_id_is_ata(id) (((id)[0] & (1 << 15)) == 0)
251#define ata_id_is_cfa(id) ((id)[0] == 0x848A)
252#define ata_id_is_sata(id) ((id)[93] == 0)
253#define ata_id_rahead_enabled(id) ((id)[85] & (1 << 6))
254#define ata_id_wcache_enabled(id) ((id)[85] & (1 << 5))
255#define ata_id_hpa_enabled(id) ((id)[85] & (1 << 10))
256#define ata_id_has_fua(id) ((id)[84] & (1 << 6))
257#define ata_id_has_flush(id) ((id)[83] & (1 << 12))
258#define ata_id_has_flush_ext(id) ((id)[83] & (1 << 13))
259#define ata_id_has_lba48(id) ((id)[83] & (1 << 10))
260#define ata_id_has_hpa(id) ((id)[82] & (1 << 10))
261#define ata_id_has_wcache(id) ((id)[82] & (1 << 5))
262#define ata_id_has_pm(id) ((id)[82] & (1 << 3))
263#define ata_id_has_lba(id) ((id)[49] & (1 << 9))
264#define ata_id_has_dma(id) ((id)[49] & (1 << 8))
265#define ata_id_removeable(id) ((id)[0] & (1 << 7))
266#define ata_id_has_dword_io(id) ((id)[50] & (1 << 0))
267#define ata_id_u32(id,n) \
268 (((u32) (id)[(n) + 1] << 16) | ((u32) (id)[(n)]))
269#define ata_id_u64(id,n) \
270 ( ((u64) (id)[(n) + 3] << 48) | \
271 ((u64) (id)[(n) + 2] << 32) | \
272 ((u64) (id)[(n) + 1] << 16) | \
273 ((u64) (id)[(n) + 0]) )
274
275static inline unsigned int ata_id_major_version(const u16 *id)
276{
277 unsigned int mver;
278
279 for (mver = 14; mver >= 1; mver--)
280 if (id[ATA_ID_MAJOR_VER] & (1 << mver))
281 break;
282 return mver;
283}
284
285static inline int ata_id_current_chs_valid(const u16 *id)
286{
287 /* For ATA-1 devices, if the INITIALIZE DEVICE PARAMETERS command
288 has not been issued to the device then the values of
289 id[54] to id[56] are vendor specific. */
290 return (id[53] & 0x01) && /* Current translation valid */
291 id[54] && /* cylinders in current translation */
292 id[55] && /* heads in current translation */
293 id[55] <= 16 &&
294 id[56]; /* sectors in current translation */
295}
296
297static inline int atapi_cdb_len(const u16 *dev_id)
298{
299 u16 tmp = dev_id[0] & 0x3;
300 switch (tmp) {
301 case 0: return 12;
302 case 1: return 16;
303 default: return -1;
304 }
305}
306
307static inline int is_atapi_taskfile(const struct ata_taskfile *tf)
308{
309 return (tf->protocol == ATA_PROT_ATAPI) ||
310 (tf->protocol == ATA_PROT_ATAPI_NODATA) ||
311 (tf->protocol == ATA_PROT_ATAPI_DMA);
312}
313
314static inline int ata_ok(u8 status)
315{
316 return ((status & (ATA_BUSY | ATA_DRDY | ATA_DF | ATA_DRQ | ATA_ERR))
317 == ATA_DRDY);
318}
319
320static inline int lba_28_ok(u64 block, u32 n_block)
321{
322 /* check the ending block number */
323 return ((block + n_block - 1) < ((u64)1 << 28)) && (n_block <= 256);
324}
325
326static inline int lba_48_ok(u64 block, u32 n_block)
327{
328 /* check the ending block number */
329 return ((block + n_block - 1) < ((u64)1 << 48)) && (n_block <= 65536);
330}
331
332#endif /* __LINUX_ATA_H__ */