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diff --git a/include/linux/ata.h b/include/linux/ata.h
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1
2/*
3 Copyright 2003-2004 Red Hat, Inc. All rights reserved.
4 Copyright 2003-2004 Jeff Garzik
5
6 The contents of this file are subject to the Open
7 Software License version 1.1 that can be found at
8 http://www.opensource.org/licenses/osl-1.1.txt and is included herein
9 by reference.
10
11 Alternatively, the contents of this file may be used under the terms
12 of the GNU General Public License version 2 (the "GPL") as distributed
13 in the kernel source COPYING file, in which case the provisions of
14 the GPL are applicable instead of the above. If you wish to allow
15 the use of your version of this file only under the terms of the
16 GPL and not to allow others to use your version of this file under
17 the OSL, indicate your decision by deleting the provisions above and
18 replace them with the notice and other provisions required by the GPL.
19 If you do not delete the provisions above, a recipient may use your
20 version of this file under either the OSL or the GPL.
21
22 */
23
24#ifndef __LINUX_ATA_H__
25#define __LINUX_ATA_H__
26
27#include <linux/types.h>
28
29/* defines only for the constants which don't work well as enums */
30#define ATA_DMA_BOUNDARY 0xffffUL
31#define ATA_DMA_MASK 0xffffffffULL
32
33enum {
34 /* various global constants */
35 ATA_MAX_DEVICES = 2, /* per bus/port */
36 ATA_MAX_PRD = 256, /* we could make these 256/256 */
37 ATA_SECT_SIZE = 512,
38
39 ATA_ID_WORDS = 256,
40 ATA_ID_PROD_OFS = 27,
41 ATA_ID_FW_REV_OFS = 23,
42 ATA_ID_SERNO_OFS = 10,
43 ATA_ID_MAJOR_VER = 80,
44 ATA_ID_PIO_MODES = 64,
45 ATA_ID_MWDMA_MODES = 63,
46 ATA_ID_UDMA_MODES = 88,
47 ATA_ID_PIO4 = (1 << 1),
48
49 ATA_PCI_CTL_OFS = 2,
50 ATA_SERNO_LEN = 20,
51 ATA_UDMA0 = (1 << 0),
52 ATA_UDMA1 = ATA_UDMA0 | (1 << 1),
53 ATA_UDMA2 = ATA_UDMA1 | (1 << 2),
54 ATA_UDMA3 = ATA_UDMA2 | (1 << 3),
55 ATA_UDMA4 = ATA_UDMA3 | (1 << 4),
56 ATA_UDMA5 = ATA_UDMA4 | (1 << 5),
57 ATA_UDMA6 = ATA_UDMA5 | (1 << 6),
58 ATA_UDMA7 = ATA_UDMA6 | (1 << 7),
59 /* ATA_UDMA7 is just for completeness... doesn't exist (yet?). */
60
61 ATA_UDMA_MASK_40C = ATA_UDMA2, /* udma0-2 */
62
63 /* DMA-related */
64 ATA_PRD_SZ = 8,
65 ATA_PRD_TBL_SZ = (ATA_MAX_PRD * ATA_PRD_SZ),
66 ATA_PRD_EOT = (1 << 31), /* end-of-table flag */
67
68 ATA_DMA_TABLE_OFS = 4,
69 ATA_DMA_STATUS = 2,
70 ATA_DMA_CMD = 0,
71 ATA_DMA_WR = (1 << 3),
72 ATA_DMA_START = (1 << 0),
73 ATA_DMA_INTR = (1 << 2),
74 ATA_DMA_ERR = (1 << 1),
75 ATA_DMA_ACTIVE = (1 << 0),
76
77 /* bits in ATA command block registers */
78 ATA_HOB = (1 << 7), /* LBA48 selector */
79 ATA_NIEN = (1 << 1), /* disable-irq flag */
80 ATA_LBA = (1 << 6), /* LBA28 selector */
81 ATA_DEV1 = (1 << 4), /* Select Device 1 (slave) */
82 ATA_DEVICE_OBS = (1 << 7) | (1 << 5), /* obs bits in dev reg */
83 ATA_DEVCTL_OBS = (1 << 3), /* obsolete bit in devctl reg */
84 ATA_BUSY = (1 << 7), /* BSY status bit */
85 ATA_DRDY = (1 << 6), /* device ready */
86 ATA_DF = (1 << 5), /* device fault */
87 ATA_DRQ = (1 << 3), /* data request i/o */
88 ATA_ERR = (1 << 0), /* have an error */
89 ATA_SRST = (1 << 2), /* software reset */
90 ATA_ABORTED = (1 << 2), /* command aborted */
91
92 /* ATA command block registers */
93 ATA_REG_DATA = 0x00,
94 ATA_REG_ERR = 0x01,
95 ATA_REG_NSECT = 0x02,
96 ATA_REG_LBAL = 0x03,
97 ATA_REG_LBAM = 0x04,
98 ATA_REG_LBAH = 0x05,
99 ATA_REG_DEVICE = 0x06,
100 ATA_REG_STATUS = 0x07,
101
102 ATA_REG_FEATURE = ATA_REG_ERR, /* and their aliases */
103 ATA_REG_CMD = ATA_REG_STATUS,
104 ATA_REG_BYTEL = ATA_REG_LBAM,
105 ATA_REG_BYTEH = ATA_REG_LBAH,
106 ATA_REG_DEVSEL = ATA_REG_DEVICE,
107 ATA_REG_IRQ = ATA_REG_NSECT,
108
109 /* ATA device commands */
110 ATA_CMD_CHK_POWER = 0xE5, /* check power mode */
111 ATA_CMD_EDD = 0x90, /* execute device diagnostic */
112 ATA_CMD_FLUSH = 0xE7,
113 ATA_CMD_FLUSH_EXT = 0xEA,
114 ATA_CMD_ID_ATA = 0xEC,
115 ATA_CMD_ID_ATAPI = 0xA1,
116 ATA_CMD_READ = 0xC8,
117 ATA_CMD_READ_EXT = 0x25,
118 ATA_CMD_WRITE = 0xCA,
119 ATA_CMD_WRITE_EXT = 0x35,
120 ATA_CMD_PIO_READ = 0x20,
121 ATA_CMD_PIO_READ_EXT = 0x24,
122 ATA_CMD_PIO_WRITE = 0x30,
123 ATA_CMD_PIO_WRITE_EXT = 0x34,
124 ATA_CMD_SET_FEATURES = 0xEF,
125 ATA_CMD_PACKET = 0xA0,
126 ATA_CMD_VERIFY = 0x40,
127 ATA_CMD_VERIFY_EXT = 0x42,
128
129 /* SETFEATURES stuff */
130 SETFEATURES_XFER = 0x03,
131 XFER_UDMA_7 = 0x47,
132 XFER_UDMA_6 = 0x46,
133 XFER_UDMA_5 = 0x45,
134 XFER_UDMA_4 = 0x44,
135 XFER_UDMA_3 = 0x43,
136 XFER_UDMA_2 = 0x42,
137 XFER_UDMA_1 = 0x41,
138 XFER_UDMA_0 = 0x40,
139 XFER_MW_DMA_2 = 0x22,
140 XFER_MW_DMA_1 = 0x21,
141 XFER_MW_DMA_0 = 0x20,
142 XFER_PIO_4 = 0x0C,
143 XFER_PIO_3 = 0x0B,
144 XFER_PIO_2 = 0x0A,
145 XFER_PIO_1 = 0x09,
146 XFER_PIO_0 = 0x08,
147 XFER_SW_DMA_2 = 0x12,
148 XFER_SW_DMA_1 = 0x11,
149 XFER_SW_DMA_0 = 0x10,
150 XFER_PIO_SLOW = 0x00,
151
152 /* ATAPI stuff */
153 ATAPI_PKT_DMA = (1 << 0),
154 ATAPI_DMADIR = (1 << 2), /* ATAPI data dir:
155 0=to device, 1=to host */
156 ATAPI_CDB_LEN = 16,
157
158 /* cable types */
159 ATA_CBL_NONE = 0,
160 ATA_CBL_PATA40 = 1,
161 ATA_CBL_PATA80 = 2,
162 ATA_CBL_PATA_UNK = 3,
163 ATA_CBL_SATA = 4,
164
165 /* SATA Status and Control Registers */
166 SCR_STATUS = 0,
167 SCR_ERROR = 1,
168 SCR_CONTROL = 2,
169 SCR_ACTIVE = 3,
170 SCR_NOTIFICATION = 4,
171
172 /* struct ata_taskfile flags */
173 ATA_TFLAG_LBA48 = (1 << 0), /* enable 48-bit LBA and "HOB" */
174 ATA_TFLAG_ISADDR = (1 << 1), /* enable r/w to nsect/lba regs */
175 ATA_TFLAG_DEVICE = (1 << 2), /* enable r/w to device reg */
176 ATA_TFLAG_WRITE = (1 << 3), /* data dir: host->dev==1 (write) */
177};
178
179enum ata_tf_protocols {
180 /* ATA taskfile protocols */
181 ATA_PROT_UNKNOWN, /* unknown/invalid */
182 ATA_PROT_NODATA, /* no data */
183 ATA_PROT_PIO, /* PIO single sector */
184 ATA_PROT_PIO_MULT, /* PIO multiple sector */
185 ATA_PROT_DMA, /* DMA */
186 ATA_PROT_ATAPI, /* packet command, PIO data xfer*/
187 ATA_PROT_ATAPI_NODATA, /* packet command, no data */
188 ATA_PROT_ATAPI_DMA, /* packet command with special DMA sauce */
189};
190
191enum ata_ioctls {
192 ATA_IOC_GET_IO32 = 0x309,
193 ATA_IOC_SET_IO32 = 0x324,
194};
195
196/* core structures */
197
198struct ata_prd {
199 u32 addr;
200 u32 flags_len;
201};
202
203struct ata_taskfile {
204 unsigned long flags; /* ATA_TFLAG_xxx */
205 u8 protocol; /* ATA_PROT_xxx */
206
207 u8 ctl; /* control reg */
208
209 u8 hob_feature; /* additional data */
210 u8 hob_nsect; /* to support LBA48 */
211 u8 hob_lbal;
212 u8 hob_lbam;
213 u8 hob_lbah;
214
215 u8 feature;
216 u8 nsect;
217 u8 lbal;
218 u8 lbam;
219 u8 lbah;
220
221 u8 device;
222
223 u8 command; /* IO operation */
224};
225
226#define ata_id_is_ata(id) (((id)[0] & (1 << 15)) == 0)
227#define ata_id_rahead_enabled(id) ((id)[85] & (1 << 6))
228#define ata_id_wcache_enabled(id) ((id)[85] & (1 << 5))
229#define ata_id_has_flush(id) ((id)[83] & (1 << 12))
230#define ata_id_has_flush_ext(id) ((id)[83] & (1 << 13))
231#define ata_id_has_lba48(id) ((id)[83] & (1 << 10))
232#define ata_id_has_wcache(id) ((id)[82] & (1 << 5))
233#define ata_id_has_pm(id) ((id)[82] & (1 << 3))
234#define ata_id_has_lba(id) ((id)[49] & (1 << 9))
235#define ata_id_has_dma(id) ((id)[49] & (1 << 8))
236#define ata_id_removeable(id) ((id)[0] & (1 << 7))
237#define ata_id_u32(id,n) \
238 (((u32) (id)[(n) + 1] << 16) | ((u32) (id)[(n)]))
239#define ata_id_u64(id,n) \
240 ( ((u64) (id)[(n) + 3] << 48) | \
241 ((u64) (id)[(n) + 2] << 32) | \
242 ((u64) (id)[(n) + 1] << 16) | \
243 ((u64) (id)[(n) + 0]) )
244
245static inline int atapi_cdb_len(u16 *dev_id)
246{
247 u16 tmp = dev_id[0] & 0x3;
248 switch (tmp) {
249 case 0: return 12;
250 case 1: return 16;
251 default: return -1;
252 }
253}
254
255static inline int is_atapi_taskfile(struct ata_taskfile *tf)
256{
257 return (tf->protocol == ATA_PROT_ATAPI) ||
258 (tf->protocol == ATA_PROT_ATAPI_NODATA) ||
259 (tf->protocol == ATA_PROT_ATAPI_DMA);
260}
261
262static inline int ata_ok(u8 status)
263{
264 return ((status & (ATA_BUSY | ATA_DRDY | ATA_DF | ATA_DRQ | ATA_ERR))
265 == ATA_DRDY);
266}
267
268#endif /* __LINUX_ATA_H__ */
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