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