Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
1da177e4 LT |
2 | * Copyright (C) 2000-2002 Andre Hedrick <andre@linux-ide.org> |
3 | * Copyright (C) 2003 Red Hat <alan@redhat.com> | |
4 | * | |
5 | */ | |
6 | ||
1da177e4 LT |
7 | #include <linux/module.h> |
8 | #include <linux/types.h> | |
9 | #include <linux/string.h> | |
10 | #include <linux/kernel.h> | |
11 | #include <linux/timer.h> | |
12 | #include <linux/mm.h> | |
13 | #include <linux/interrupt.h> | |
14 | #include <linux/major.h> | |
15 | #include <linux/errno.h> | |
16 | #include <linux/genhd.h> | |
17 | #include <linux/blkpg.h> | |
18 | #include <linux/slab.h> | |
19 | #include <linux/pci.h> | |
20 | #include <linux/delay.h> | |
21 | #include <linux/hdreg.h> | |
22 | #include <linux/ide.h> | |
23 | #include <linux/bitops.h> | |
1e86240f | 24 | #include <linux/nmi.h> |
1da177e4 LT |
25 | |
26 | #include <asm/byteorder.h> | |
27 | #include <asm/irq.h> | |
28 | #include <asm/uaccess.h> | |
29 | #include <asm/io.h> | |
30 | ||
31 | /* | |
32 | * Conventional PIO operations for ATA devices | |
33 | */ | |
34 | ||
35 | static u8 ide_inb (unsigned long port) | |
36 | { | |
37 | return (u8) inb(port); | |
38 | } | |
39 | ||
1da177e4 LT |
40 | static void ide_outb (u8 val, unsigned long port) |
41 | { | |
42 | outb(val, port); | |
43 | } | |
44 | ||
f8c4bd0a | 45 | static void ide_outbsync(ide_hwif_t *hwif, u8 addr, unsigned long port) |
1da177e4 LT |
46 | { |
47 | outb(addr, port); | |
48 | } | |
49 | ||
1da177e4 LT |
50 | void default_hwif_iops (ide_hwif_t *hwif) |
51 | { | |
52 | hwif->OUTB = ide_outb; | |
53 | hwif->OUTBSYNC = ide_outbsync; | |
1da177e4 | 54 | hwif->INB = ide_inb; |
1da177e4 LT |
55 | } |
56 | ||
1da177e4 LT |
57 | /* |
58 | * MMIO operations, typically used for SATA controllers | |
59 | */ | |
60 | ||
61 | static u8 ide_mm_inb (unsigned long port) | |
62 | { | |
63 | return (u8) readb((void __iomem *) port); | |
64 | } | |
65 | ||
1da177e4 LT |
66 | static void ide_mm_outb (u8 value, unsigned long port) |
67 | { | |
68 | writeb(value, (void __iomem *) port); | |
69 | } | |
70 | ||
f8c4bd0a | 71 | static void ide_mm_outbsync(ide_hwif_t *hwif, u8 value, unsigned long port) |
1da177e4 LT |
72 | { |
73 | writeb(value, (void __iomem *) port); | |
74 | } | |
75 | ||
1da177e4 LT |
76 | void default_hwif_mmiops (ide_hwif_t *hwif) |
77 | { | |
78 | hwif->OUTB = ide_mm_outb; | |
79 | /* Most systems will need to override OUTBSYNC, alas however | |
80 | this one is controller specific! */ | |
81 | hwif->OUTBSYNC = ide_mm_outbsync; | |
1da177e4 | 82 | hwif->INB = ide_mm_inb; |
1da177e4 LT |
83 | } |
84 | ||
85 | EXPORT_SYMBOL(default_hwif_mmiops); | |
86 | ||
1da177e4 LT |
87 | void SELECT_DRIVE (ide_drive_t *drive) |
88 | { | |
23579a2a | 89 | ide_hwif_t *hwif = drive->hwif; |
ac95beed | 90 | const struct ide_port_ops *port_ops = hwif->port_ops; |
23579a2a | 91 | |
ac95beed BZ |
92 | if (port_ops && port_ops->selectproc) |
93 | port_ops->selectproc(drive); | |
23579a2a | 94 | |
4c3032d8 | 95 | hwif->OUTB(drive->select.all, hwif->io_ports.device_addr); |
1da177e4 LT |
96 | } |
97 | ||
ed4af48f | 98 | void SELECT_MASK(ide_drive_t *drive, int mask) |
1da177e4 | 99 | { |
ac95beed BZ |
100 | const struct ide_port_ops *port_ops = drive->hwif->port_ops; |
101 | ||
102 | if (port_ops && port_ops->maskproc) | |
103 | port_ops->maskproc(drive, mask); | |
1da177e4 LT |
104 | } |
105 | ||
c6dfa867 BZ |
106 | static void ide_exec_command(ide_hwif_t *hwif, u8 cmd) |
107 | { | |
108 | if (hwif->host_flags & IDE_HFLAG_MMIO) | |
109 | writeb(cmd, (void __iomem *)hwif->io_ports.command_addr); | |
110 | else | |
111 | outb(cmd, hwif->io_ports.command_addr); | |
112 | } | |
113 | ||
b73c7ee2 BZ |
114 | static u8 ide_read_status(ide_hwif_t *hwif) |
115 | { | |
116 | if (hwif->host_flags & IDE_HFLAG_MMIO) | |
117 | return readb((void __iomem *)hwif->io_ports.status_addr); | |
118 | else | |
119 | return inb(hwif->io_ports.status_addr); | |
120 | } | |
121 | ||
1f6d8a0f BZ |
122 | static u8 ide_read_altstatus(ide_hwif_t *hwif) |
123 | { | |
124 | if (hwif->host_flags & IDE_HFLAG_MMIO) | |
125 | return readb((void __iomem *)hwif->io_ports.ctl_addr); | |
126 | else | |
127 | return inb(hwif->io_ports.ctl_addr); | |
128 | } | |
129 | ||
b2f951aa BZ |
130 | static u8 ide_read_sff_dma_status(ide_hwif_t *hwif) |
131 | { | |
132 | if (hwif->host_flags & IDE_HFLAG_MMIO) | |
cab7f8ed | 133 | return readb((void __iomem *)(hwif->dma_base + ATA_DMA_STATUS)); |
b2f951aa | 134 | else |
cab7f8ed | 135 | return inb(hwif->dma_base + ATA_DMA_STATUS); |
b2f951aa BZ |
136 | } |
137 | ||
6e6afb3b BZ |
138 | static void ide_set_irq(ide_hwif_t *hwif, int on) |
139 | { | |
140 | u8 ctl = ATA_DEVCTL_OBS; | |
141 | ||
142 | if (on == 4) { /* hack for SRST */ | |
143 | ctl |= 4; | |
144 | on &= ~4; | |
145 | } | |
146 | ||
147 | ctl |= on ? 0 : 2; | |
148 | ||
149 | if (hwif->host_flags & IDE_HFLAG_MMIO) | |
150 | writeb(ctl, (void __iomem *)hwif->io_ports.ctl_addr); | |
151 | else | |
152 | outb(ctl, hwif->io_ports.ctl_addr); | |
153 | } | |
154 | ||
94cd5b62 | 155 | static void ide_tf_load(ide_drive_t *drive, ide_task_t *task) |
d309e0bb BZ |
156 | { |
157 | ide_hwif_t *hwif = drive->hwif; | |
158 | struct ide_io_ports *io_ports = &hwif->io_ports; | |
159 | struct ide_taskfile *tf = &task->tf; | |
ca545c1e BZ |
160 | void (*tf_outb)(u8 addr, unsigned long port); |
161 | u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0; | |
d309e0bb BZ |
162 | u8 HIHI = (task->tf_flags & IDE_TFLAG_LBA48) ? 0xE0 : 0xEF; |
163 | ||
ca545c1e BZ |
164 | if (mmio) |
165 | tf_outb = ide_mm_outb; | |
166 | else | |
167 | tf_outb = ide_outb; | |
168 | ||
d309e0bb BZ |
169 | if (task->tf_flags & IDE_TFLAG_FLAGGED) |
170 | HIHI = 0xFF; | |
171 | ||
ca545c1e BZ |
172 | if (task->tf_flags & IDE_TFLAG_OUT_DATA) { |
173 | u16 data = (tf->hob_data << 8) | tf->data; | |
174 | ||
175 | if (mmio) | |
176 | writew(data, (void __iomem *)io_ports->data_addr); | |
177 | else | |
178 | outw(data, io_ports->data_addr); | |
179 | } | |
d309e0bb BZ |
180 | |
181 | if (task->tf_flags & IDE_TFLAG_OUT_HOB_FEATURE) | |
ca545c1e | 182 | tf_outb(tf->hob_feature, io_ports->feature_addr); |
d309e0bb | 183 | if (task->tf_flags & IDE_TFLAG_OUT_HOB_NSECT) |
ca545c1e | 184 | tf_outb(tf->hob_nsect, io_ports->nsect_addr); |
d309e0bb | 185 | if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAL) |
ca545c1e | 186 | tf_outb(tf->hob_lbal, io_ports->lbal_addr); |
d309e0bb | 187 | if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAM) |
ca545c1e | 188 | tf_outb(tf->hob_lbam, io_ports->lbam_addr); |
d309e0bb | 189 | if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAH) |
ca545c1e | 190 | tf_outb(tf->hob_lbah, io_ports->lbah_addr); |
d309e0bb BZ |
191 | |
192 | if (task->tf_flags & IDE_TFLAG_OUT_FEATURE) | |
ca545c1e | 193 | tf_outb(tf->feature, io_ports->feature_addr); |
d309e0bb | 194 | if (task->tf_flags & IDE_TFLAG_OUT_NSECT) |
ca545c1e | 195 | tf_outb(tf->nsect, io_ports->nsect_addr); |
d309e0bb | 196 | if (task->tf_flags & IDE_TFLAG_OUT_LBAL) |
ca545c1e | 197 | tf_outb(tf->lbal, io_ports->lbal_addr); |
d309e0bb | 198 | if (task->tf_flags & IDE_TFLAG_OUT_LBAM) |
ca545c1e | 199 | tf_outb(tf->lbam, io_ports->lbam_addr); |
d309e0bb | 200 | if (task->tf_flags & IDE_TFLAG_OUT_LBAH) |
ca545c1e | 201 | tf_outb(tf->lbah, io_ports->lbah_addr); |
d309e0bb BZ |
202 | |
203 | if (task->tf_flags & IDE_TFLAG_OUT_DEVICE) | |
ca545c1e BZ |
204 | tf_outb((tf->device & HIHI) | drive->select.all, |
205 | io_ports->device_addr); | |
d309e0bb BZ |
206 | } |
207 | ||
94cd5b62 | 208 | static void ide_tf_read(ide_drive_t *drive, ide_task_t *task) |
d309e0bb BZ |
209 | { |
210 | ide_hwif_t *hwif = drive->hwif; | |
211 | struct ide_io_ports *io_ports = &hwif->io_ports; | |
212 | struct ide_taskfile *tf = &task->tf; | |
ca545c1e BZ |
213 | void (*tf_outb)(u8 addr, unsigned long port); |
214 | u8 (*tf_inb)(unsigned long port); | |
215 | u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0; | |
216 | ||
217 | if (mmio) { | |
218 | tf_outb = ide_mm_outb; | |
219 | tf_inb = ide_mm_inb; | |
220 | } else { | |
221 | tf_outb = ide_outb; | |
222 | tf_inb = ide_inb; | |
223 | } | |
d309e0bb BZ |
224 | |
225 | if (task->tf_flags & IDE_TFLAG_IN_DATA) { | |
ca545c1e BZ |
226 | u16 data; |
227 | ||
228 | if (mmio) | |
229 | data = readw((void __iomem *)io_ports->data_addr); | |
230 | else | |
231 | data = inw(io_ports->data_addr); | |
d309e0bb BZ |
232 | |
233 | tf->data = data & 0xff; | |
234 | tf->hob_data = (data >> 8) & 0xff; | |
235 | } | |
236 | ||
237 | /* be sure we're looking at the low order bits */ | |
ff074883 | 238 | tf_outb(ATA_DEVCTL_OBS & ~0x80, io_ports->ctl_addr); |
d309e0bb BZ |
239 | |
240 | if (task->tf_flags & IDE_TFLAG_IN_NSECT) | |
ca545c1e | 241 | tf->nsect = tf_inb(io_ports->nsect_addr); |
d309e0bb | 242 | if (task->tf_flags & IDE_TFLAG_IN_LBAL) |
ca545c1e | 243 | tf->lbal = tf_inb(io_ports->lbal_addr); |
d309e0bb | 244 | if (task->tf_flags & IDE_TFLAG_IN_LBAM) |
ca545c1e | 245 | tf->lbam = tf_inb(io_ports->lbam_addr); |
d309e0bb | 246 | if (task->tf_flags & IDE_TFLAG_IN_LBAH) |
ca545c1e | 247 | tf->lbah = tf_inb(io_ports->lbah_addr); |
d309e0bb | 248 | if (task->tf_flags & IDE_TFLAG_IN_DEVICE) |
ca545c1e | 249 | tf->device = tf_inb(io_ports->device_addr); |
d309e0bb BZ |
250 | |
251 | if (task->tf_flags & IDE_TFLAG_LBA48) { | |
ff074883 | 252 | tf_outb(ATA_DEVCTL_OBS | 0x80, io_ports->ctl_addr); |
d309e0bb BZ |
253 | |
254 | if (task->tf_flags & IDE_TFLAG_IN_HOB_FEATURE) | |
ca545c1e | 255 | tf->hob_feature = tf_inb(io_ports->feature_addr); |
d309e0bb | 256 | if (task->tf_flags & IDE_TFLAG_IN_HOB_NSECT) |
ca545c1e | 257 | tf->hob_nsect = tf_inb(io_ports->nsect_addr); |
d309e0bb | 258 | if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAL) |
ca545c1e | 259 | tf->hob_lbal = tf_inb(io_ports->lbal_addr); |
d309e0bb | 260 | if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAM) |
ca545c1e | 261 | tf->hob_lbam = tf_inb(io_ports->lbam_addr); |
d309e0bb | 262 | if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAH) |
ca545c1e | 263 | tf->hob_lbah = tf_inb(io_ports->lbah_addr); |
d309e0bb BZ |
264 | } |
265 | } | |
266 | ||
1da177e4 LT |
267 | /* |
268 | * Some localbus EIDE interfaces require a special access sequence | |
269 | * when using 32-bit I/O instructions to transfer data. We call this | |
270 | * the "vlb_sync" sequence, which consists of three successive reads | |
271 | * of the sector count register location, with interrupts disabled | |
272 | * to ensure that the reads all happen together. | |
273 | */ | |
22cdd6ce | 274 | static void ata_vlb_sync(unsigned long port) |
1da177e4 | 275 | { |
22cdd6ce BZ |
276 | (void)inb(port); |
277 | (void)inb(port); | |
278 | (void)inb(port); | |
1da177e4 LT |
279 | } |
280 | ||
281 | /* | |
282 | * This is used for most PIO data transfers *from* the IDE interface | |
9567b349 BZ |
283 | * |
284 | * These routines will round up any request for an odd number of bytes, | |
285 | * so if an odd len is specified, be sure that there's at least one | |
286 | * extra byte allocated for the buffer. | |
1da177e4 | 287 | */ |
92d3ab27 | 288 | static void ata_input_data(ide_drive_t *drive, struct request *rq, |
9567b349 | 289 | void *buf, unsigned int len) |
1da177e4 | 290 | { |
4c3032d8 BZ |
291 | ide_hwif_t *hwif = drive->hwif; |
292 | struct ide_io_ports *io_ports = &hwif->io_ports; | |
9567b349 | 293 | unsigned long data_addr = io_ports->data_addr; |
4c3032d8 | 294 | u8 io_32bit = drive->io_32bit; |
16bb69c1 | 295 | u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0; |
1da177e4 | 296 | |
9567b349 BZ |
297 | len++; |
298 | ||
1da177e4 | 299 | if (io_32bit) { |
16bb69c1 | 300 | unsigned long uninitialized_var(flags); |
23579a2a | 301 | |
22cdd6ce | 302 | if ((io_32bit & 2) && !mmio) { |
1da177e4 | 303 | local_irq_save(flags); |
22cdd6ce | 304 | ata_vlb_sync(io_ports->nsect_addr); |
16bb69c1 BZ |
305 | } |
306 | ||
307 | if (mmio) | |
308 | __ide_mm_insl((void __iomem *)data_addr, buf, len / 4); | |
309 | else | |
310 | insl(data_addr, buf, len / 4); | |
311 | ||
22cdd6ce | 312 | if ((io_32bit & 2) && !mmio) |
1da177e4 | 313 | local_irq_restore(flags); |
9567b349 | 314 | |
16bb69c1 BZ |
315 | if ((len & 3) >= 2) { |
316 | if (mmio) | |
317 | __ide_mm_insw((void __iomem *)data_addr, | |
318 | (u8 *)buf + (len & ~3), 1); | |
319 | else | |
320 | insw(data_addr, (u8 *)buf + (len & ~3), 1); | |
321 | } | |
322 | } else { | |
323 | if (mmio) | |
324 | __ide_mm_insw((void __iomem *)data_addr, buf, len / 2); | |
325 | else | |
326 | insw(data_addr, buf, len / 2); | |
327 | } | |
1da177e4 LT |
328 | } |
329 | ||
330 | /* | |
331 | * This is used for most PIO data transfers *to* the IDE interface | |
332 | */ | |
92d3ab27 | 333 | static void ata_output_data(ide_drive_t *drive, struct request *rq, |
9567b349 | 334 | void *buf, unsigned int len) |
1da177e4 | 335 | { |
4c3032d8 BZ |
336 | ide_hwif_t *hwif = drive->hwif; |
337 | struct ide_io_ports *io_ports = &hwif->io_ports; | |
9567b349 | 338 | unsigned long data_addr = io_ports->data_addr; |
4c3032d8 | 339 | u8 io_32bit = drive->io_32bit; |
16bb69c1 | 340 | u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0; |
1da177e4 LT |
341 | |
342 | if (io_32bit) { | |
16bb69c1 | 343 | unsigned long uninitialized_var(flags); |
23579a2a | 344 | |
22cdd6ce | 345 | if ((io_32bit & 2) && !mmio) { |
1da177e4 | 346 | local_irq_save(flags); |
22cdd6ce | 347 | ata_vlb_sync(io_ports->nsect_addr); |
16bb69c1 BZ |
348 | } |
349 | ||
350 | if (mmio) | |
351 | __ide_mm_outsl((void __iomem *)data_addr, buf, len / 4); | |
352 | else | |
353 | outsl(data_addr, buf, len / 4); | |
354 | ||
22cdd6ce | 355 | if ((io_32bit & 2) && !mmio) |
1da177e4 | 356 | local_irq_restore(flags); |
1da177e4 | 357 | |
16bb69c1 BZ |
358 | if ((len & 3) >= 2) { |
359 | if (mmio) | |
360 | __ide_mm_outsw((void __iomem *)data_addr, | |
361 | (u8 *)buf + (len & ~3), 1); | |
362 | else | |
363 | outsw(data_addr, (u8 *)buf + (len & ~3), 1); | |
364 | } | |
365 | } else { | |
366 | if (mmio) | |
367 | __ide_mm_outsw((void __iomem *)data_addr, buf, len / 2); | |
368 | else | |
369 | outsw(data_addr, buf, len / 2); | |
370 | } | |
1da177e4 LT |
371 | } |
372 | ||
373 | void default_hwif_transport(ide_hwif_t *hwif) | |
374 | { | |
c6dfa867 | 375 | hwif->exec_command = ide_exec_command; |
b73c7ee2 | 376 | hwif->read_status = ide_read_status; |
1f6d8a0f | 377 | hwif->read_altstatus = ide_read_altstatus; |
b2f951aa BZ |
378 | hwif->read_sff_dma_status = ide_read_sff_dma_status; |
379 | ||
6e6afb3b BZ |
380 | hwif->set_irq = ide_set_irq; |
381 | ||
94cd5b62 BZ |
382 | hwif->tf_load = ide_tf_load; |
383 | hwif->tf_read = ide_tf_read; | |
384 | ||
9567b349 BZ |
385 | hwif->input_data = ata_input_data; |
386 | hwif->output_data = ata_output_data; | |
1da177e4 LT |
387 | } |
388 | ||
1da177e4 LT |
389 | void ide_fix_driveid (struct hd_driveid *id) |
390 | { | |
391 | #ifndef __LITTLE_ENDIAN | |
392 | # ifdef __BIG_ENDIAN | |
393 | int i; | |
394 | u16 *stringcast; | |
395 | ||
396 | id->config = __le16_to_cpu(id->config); | |
397 | id->cyls = __le16_to_cpu(id->cyls); | |
398 | id->reserved2 = __le16_to_cpu(id->reserved2); | |
399 | id->heads = __le16_to_cpu(id->heads); | |
400 | id->track_bytes = __le16_to_cpu(id->track_bytes); | |
401 | id->sector_bytes = __le16_to_cpu(id->sector_bytes); | |
402 | id->sectors = __le16_to_cpu(id->sectors); | |
403 | id->vendor0 = __le16_to_cpu(id->vendor0); | |
404 | id->vendor1 = __le16_to_cpu(id->vendor1); | |
405 | id->vendor2 = __le16_to_cpu(id->vendor2); | |
406 | stringcast = (u16 *)&id->serial_no[0]; | |
407 | for (i = 0; i < (20/2); i++) | |
408 | stringcast[i] = __le16_to_cpu(stringcast[i]); | |
409 | id->buf_type = __le16_to_cpu(id->buf_type); | |
410 | id->buf_size = __le16_to_cpu(id->buf_size); | |
411 | id->ecc_bytes = __le16_to_cpu(id->ecc_bytes); | |
412 | stringcast = (u16 *)&id->fw_rev[0]; | |
413 | for (i = 0; i < (8/2); i++) | |
414 | stringcast[i] = __le16_to_cpu(stringcast[i]); | |
415 | stringcast = (u16 *)&id->model[0]; | |
416 | for (i = 0; i < (40/2); i++) | |
417 | stringcast[i] = __le16_to_cpu(stringcast[i]); | |
418 | id->dword_io = __le16_to_cpu(id->dword_io); | |
419 | id->reserved50 = __le16_to_cpu(id->reserved50); | |
420 | id->field_valid = __le16_to_cpu(id->field_valid); | |
421 | id->cur_cyls = __le16_to_cpu(id->cur_cyls); | |
422 | id->cur_heads = __le16_to_cpu(id->cur_heads); | |
423 | id->cur_sectors = __le16_to_cpu(id->cur_sectors); | |
424 | id->cur_capacity0 = __le16_to_cpu(id->cur_capacity0); | |
425 | id->cur_capacity1 = __le16_to_cpu(id->cur_capacity1); | |
426 | id->lba_capacity = __le32_to_cpu(id->lba_capacity); | |
427 | id->dma_1word = __le16_to_cpu(id->dma_1word); | |
428 | id->dma_mword = __le16_to_cpu(id->dma_mword); | |
429 | id->eide_pio_modes = __le16_to_cpu(id->eide_pio_modes); | |
430 | id->eide_dma_min = __le16_to_cpu(id->eide_dma_min); | |
431 | id->eide_dma_time = __le16_to_cpu(id->eide_dma_time); | |
432 | id->eide_pio = __le16_to_cpu(id->eide_pio); | |
433 | id->eide_pio_iordy = __le16_to_cpu(id->eide_pio_iordy); | |
434 | for (i = 0; i < 2; ++i) | |
435 | id->words69_70[i] = __le16_to_cpu(id->words69_70[i]); | |
436 | for (i = 0; i < 4; ++i) | |
437 | id->words71_74[i] = __le16_to_cpu(id->words71_74[i]); | |
438 | id->queue_depth = __le16_to_cpu(id->queue_depth); | |
439 | for (i = 0; i < 4; ++i) | |
440 | id->words76_79[i] = __le16_to_cpu(id->words76_79[i]); | |
441 | id->major_rev_num = __le16_to_cpu(id->major_rev_num); | |
442 | id->minor_rev_num = __le16_to_cpu(id->minor_rev_num); | |
443 | id->command_set_1 = __le16_to_cpu(id->command_set_1); | |
444 | id->command_set_2 = __le16_to_cpu(id->command_set_2); | |
445 | id->cfsse = __le16_to_cpu(id->cfsse); | |
446 | id->cfs_enable_1 = __le16_to_cpu(id->cfs_enable_1); | |
447 | id->cfs_enable_2 = __le16_to_cpu(id->cfs_enable_2); | |
448 | id->csf_default = __le16_to_cpu(id->csf_default); | |
449 | id->dma_ultra = __le16_to_cpu(id->dma_ultra); | |
450 | id->trseuc = __le16_to_cpu(id->trseuc); | |
451 | id->trsEuc = __le16_to_cpu(id->trsEuc); | |
452 | id->CurAPMvalues = __le16_to_cpu(id->CurAPMvalues); | |
453 | id->mprc = __le16_to_cpu(id->mprc); | |
454 | id->hw_config = __le16_to_cpu(id->hw_config); | |
455 | id->acoustic = __le16_to_cpu(id->acoustic); | |
456 | id->msrqs = __le16_to_cpu(id->msrqs); | |
457 | id->sxfert = __le16_to_cpu(id->sxfert); | |
458 | id->sal = __le16_to_cpu(id->sal); | |
459 | id->spg = __le32_to_cpu(id->spg); | |
460 | id->lba_capacity_2 = __le64_to_cpu(id->lba_capacity_2); | |
461 | for (i = 0; i < 22; i++) | |
462 | id->words104_125[i] = __le16_to_cpu(id->words104_125[i]); | |
463 | id->last_lun = __le16_to_cpu(id->last_lun); | |
464 | id->word127 = __le16_to_cpu(id->word127); | |
465 | id->dlf = __le16_to_cpu(id->dlf); | |
466 | id->csfo = __le16_to_cpu(id->csfo); | |
467 | for (i = 0; i < 26; i++) | |
468 | id->words130_155[i] = __le16_to_cpu(id->words130_155[i]); | |
469 | id->word156 = __le16_to_cpu(id->word156); | |
470 | for (i = 0; i < 3; i++) | |
471 | id->words157_159[i] = __le16_to_cpu(id->words157_159[i]); | |
472 | id->cfa_power = __le16_to_cpu(id->cfa_power); | |
473 | for (i = 0; i < 14; i++) | |
474 | id->words161_175[i] = __le16_to_cpu(id->words161_175[i]); | |
475 | for (i = 0; i < 31; i++) | |
476 | id->words176_205[i] = __le16_to_cpu(id->words176_205[i]); | |
477 | for (i = 0; i < 48; i++) | |
478 | id->words206_254[i] = __le16_to_cpu(id->words206_254[i]); | |
479 | id->integrity_word = __le16_to_cpu(id->integrity_word); | |
480 | # else | |
481 | # error "Please fix <asm/byteorder.h>" | |
482 | # endif | |
483 | #endif | |
484 | } | |
485 | ||
01745112 BZ |
486 | /* |
487 | * ide_fixstring() cleans up and (optionally) byte-swaps a text string, | |
488 | * removing leading/trailing blanks and compressing internal blanks. | |
489 | * It is primarily used to tidy up the model name/number fields as | |
490 | * returned by the WIN_[P]IDENTIFY commands. | |
491 | */ | |
492 | ||
1da177e4 LT |
493 | void ide_fixstring (u8 *s, const int bytecount, const int byteswap) |
494 | { | |
495 | u8 *p = s, *end = &s[bytecount & ~1]; /* bytecount must be even */ | |
496 | ||
497 | if (byteswap) { | |
498 | /* convert from big-endian to host byte order */ | |
499 | for (p = end ; p != s;) { | |
500 | unsigned short *pp = (unsigned short *) (p -= 2); | |
501 | *pp = ntohs(*pp); | |
502 | } | |
503 | } | |
504 | /* strip leading blanks */ | |
505 | while (s != end && *s == ' ') | |
506 | ++s; | |
507 | /* compress internal blanks and strip trailing blanks */ | |
508 | while (s != end && *s) { | |
509 | if (*s++ != ' ' || (s != end && *s && *s != ' ')) | |
510 | *p++ = *(s-1); | |
511 | } | |
512 | /* wipe out trailing garbage */ | |
513 | while (p != end) | |
514 | *p++ = '\0'; | |
515 | } | |
516 | ||
517 | EXPORT_SYMBOL(ide_fixstring); | |
518 | ||
519 | /* | |
520 | * Needed for PCI irq sharing | |
521 | */ | |
522 | int drive_is_ready (ide_drive_t *drive) | |
523 | { | |
524 | ide_hwif_t *hwif = HWIF(drive); | |
525 | u8 stat = 0; | |
526 | ||
527 | if (drive->waiting_for_dma) | |
5e37bdc0 | 528 | return hwif->dma_ops->dma_test_irq(drive); |
1da177e4 LT |
529 | |
530 | #if 0 | |
531 | /* need to guarantee 400ns since last command was issued */ | |
532 | udelay(1); | |
533 | #endif | |
534 | ||
1da177e4 LT |
535 | /* |
536 | * We do a passive status test under shared PCI interrupts on | |
537 | * cards that truly share the ATA side interrupt, but may also share | |
538 | * an interrupt with another pci card/device. We make no assumptions | |
539 | * about possible isa-pnp and pci-pnp issues yet. | |
540 | */ | |
4c3032d8 | 541 | if (hwif->io_ports.ctl_addr) |
1f6d8a0f | 542 | stat = hwif->read_altstatus(hwif); |
1da177e4 | 543 | else |
1da177e4 | 544 | /* Note: this may clear a pending IRQ!! */ |
b73c7ee2 | 545 | stat = hwif->read_status(hwif); |
1da177e4 LT |
546 | |
547 | if (stat & BUSY_STAT) | |
548 | /* drive busy: definitely not interrupting */ | |
549 | return 0; | |
550 | ||
551 | /* drive ready: *might* be interrupting */ | |
552 | return 1; | |
553 | } | |
554 | ||
555 | EXPORT_SYMBOL(drive_is_ready); | |
556 | ||
1da177e4 LT |
557 | /* |
558 | * This routine busy-waits for the drive status to be not "busy". | |
559 | * It then checks the status for all of the "good" bits and none | |
560 | * of the "bad" bits, and if all is okay it returns 0. All other | |
74af21cf | 561 | * cases return error -- caller may then invoke ide_error(). |
1da177e4 LT |
562 | * |
563 | * This routine should get fixed to not hog the cpu during extra long waits.. | |
564 | * That could be done by busy-waiting for the first jiffy or two, and then | |
565 | * setting a timer to wake up at half second intervals thereafter, | |
566 | * until timeout is achieved, before timing out. | |
567 | */ | |
aedea591 | 568 | static int __ide_wait_stat(ide_drive_t *drive, u8 good, u8 bad, unsigned long timeout, u8 *rstat) |
1da177e4 | 569 | { |
b73c7ee2 | 570 | ide_hwif_t *hwif = drive->hwif; |
1da177e4 | 571 | unsigned long flags; |
74af21cf BZ |
572 | int i; |
573 | u8 stat; | |
1da177e4 LT |
574 | |
575 | udelay(1); /* spec allows drive 400ns to assert "BUSY" */ | |
b73c7ee2 | 576 | stat = hwif->read_status(hwif); |
c47137a9 BZ |
577 | |
578 | if (stat & BUSY_STAT) { | |
1da177e4 LT |
579 | local_irq_set(flags); |
580 | timeout += jiffies; | |
b73c7ee2 | 581 | while ((stat = hwif->read_status(hwif)) & BUSY_STAT) { |
1da177e4 LT |
582 | if (time_after(jiffies, timeout)) { |
583 | /* | |
584 | * One last read after the timeout in case | |
585 | * heavy interrupt load made us not make any | |
586 | * progress during the timeout.. | |
587 | */ | |
b73c7ee2 | 588 | stat = hwif->read_status(hwif); |
1da177e4 LT |
589 | if (!(stat & BUSY_STAT)) |
590 | break; | |
591 | ||
592 | local_irq_restore(flags); | |
74af21cf BZ |
593 | *rstat = stat; |
594 | return -EBUSY; | |
1da177e4 LT |
595 | } |
596 | } | |
597 | local_irq_restore(flags); | |
598 | } | |
599 | /* | |
600 | * Allow status to settle, then read it again. | |
601 | * A few rare drives vastly violate the 400ns spec here, | |
602 | * so we'll wait up to 10usec for a "good" status | |
603 | * rather than expensively fail things immediately. | |
604 | * This fix courtesy of Matthew Faupel & Niccolo Rigacci. | |
605 | */ | |
606 | for (i = 0; i < 10; i++) { | |
607 | udelay(1); | |
b73c7ee2 | 608 | stat = hwif->read_status(hwif); |
c47137a9 BZ |
609 | |
610 | if (OK_STAT(stat, good, bad)) { | |
74af21cf | 611 | *rstat = stat; |
1da177e4 | 612 | return 0; |
74af21cf | 613 | } |
1da177e4 | 614 | } |
74af21cf BZ |
615 | *rstat = stat; |
616 | return -EFAULT; | |
617 | } | |
618 | ||
619 | /* | |
620 | * In case of error returns error value after doing "*startstop = ide_error()". | |
621 | * The caller should return the updated value of "startstop" in this case, | |
622 | * "startstop" is unchanged when the function returns 0. | |
623 | */ | |
624 | int ide_wait_stat(ide_startstop_t *startstop, ide_drive_t *drive, u8 good, u8 bad, unsigned long timeout) | |
625 | { | |
626 | int err; | |
627 | u8 stat; | |
628 | ||
629 | /* bail early if we've exceeded max_failures */ | |
630 | if (drive->max_failures && (drive->failures > drive->max_failures)) { | |
631 | *startstop = ide_stopped; | |
632 | return 1; | |
633 | } | |
634 | ||
635 | err = __ide_wait_stat(drive, good, bad, timeout, &stat); | |
636 | ||
637 | if (err) { | |
638 | char *s = (err == -EBUSY) ? "status timeout" : "status error"; | |
639 | *startstop = ide_error(drive, s, stat); | |
640 | } | |
641 | ||
642 | return err; | |
1da177e4 LT |
643 | } |
644 | ||
645 | EXPORT_SYMBOL(ide_wait_stat); | |
646 | ||
a5b7e70d BZ |
647 | /** |
648 | * ide_in_drive_list - look for drive in black/white list | |
649 | * @id: drive identifier | |
650 | * @drive_table: list to inspect | |
651 | * | |
652 | * Look for a drive in the blacklist and the whitelist tables | |
653 | * Returns 1 if the drive is found in the table. | |
654 | */ | |
655 | ||
656 | int ide_in_drive_list(struct hd_driveid *id, const struct drive_list_entry *drive_table) | |
657 | { | |
658 | for ( ; drive_table->id_model; drive_table++) | |
659 | if ((!strcmp(drive_table->id_model, id->model)) && | |
660 | (!drive_table->id_firmware || | |
661 | strstr(id->fw_rev, drive_table->id_firmware))) | |
662 | return 1; | |
663 | return 0; | |
664 | } | |
665 | ||
b0244a00 BZ |
666 | EXPORT_SYMBOL_GPL(ide_in_drive_list); |
667 | ||
a5b7e70d BZ |
668 | /* |
669 | * Early UDMA66 devices don't set bit14 to 1, only bit13 is valid. | |
670 | * We list them here and depend on the device side cable detection for them. | |
8588a2b7 BZ |
671 | * |
672 | * Some optical devices with the buggy firmwares have the same problem. | |
a5b7e70d BZ |
673 | */ |
674 | static const struct drive_list_entry ivb_list[] = { | |
675 | { "QUANTUM FIREBALLlct10 05" , "A03.0900" }, | |
8588a2b7 | 676 | { "TSSTcorp CDDVDW SH-S202J" , "SB00" }, |
e97564f3 PM |
677 | { "TSSTcorp CDDVDW SH-S202J" , "SB01" }, |
678 | { "TSSTcorp CDDVDW SH-S202N" , "SB00" }, | |
679 | { "TSSTcorp CDDVDW SH-S202N" , "SB01" }, | |
3ced5c49 AS |
680 | { "TSSTcorp CDDVDW SH-S202H" , "SB00" }, |
681 | { "TSSTcorp CDDVDW SH-S202H" , "SB01" }, | |
a5b7e70d BZ |
682 | { NULL , NULL } |
683 | }; | |
684 | ||
1da177e4 LT |
685 | /* |
686 | * All hosts that use the 80c ribbon must use! | |
687 | * The name is derived from upper byte of word 93 and the 80c ribbon. | |
688 | */ | |
689 | u8 eighty_ninty_three (ide_drive_t *drive) | |
690 | { | |
7f8f48af BZ |
691 | ide_hwif_t *hwif = drive->hwif; |
692 | struct hd_driveid *id = drive->id; | |
a5b7e70d | 693 | int ivb = ide_in_drive_list(id, ivb_list); |
7f8f48af | 694 | |
49521f97 BZ |
695 | if (hwif->cbl == ATA_CBL_PATA40_SHORT) |
696 | return 1; | |
697 | ||
a5b7e70d BZ |
698 | if (ivb) |
699 | printk(KERN_DEBUG "%s: skipping word 93 validity check\n", | |
700 | drive->name); | |
701 | ||
b98f8803 GK |
702 | if (ide_dev_is_sata(id) && !ivb) |
703 | return 1; | |
704 | ||
a5b7e70d | 705 | if (hwif->cbl != ATA_CBL_PATA80 && !ivb) |
7f8f48af | 706 | goto no_80w; |
1a1276e7 | 707 | |
f68d9320 BZ |
708 | /* |
709 | * FIXME: | |
f367bed0 | 710 | * - change master/slave IDENTIFY order |
a5b7e70d | 711 | * - force bit13 (80c cable present) check also for !ivb devices |
f68d9320 BZ |
712 | * (unless the slave device is pre-ATA3) |
713 | */ | |
a5b7e70d | 714 | if ((id->hw_config & 0x4000) || (ivb && (id->hw_config & 0x2000))) |
7f8f48af BZ |
715 | return 1; |
716 | ||
717 | no_80w: | |
718 | if (drive->udma33_warned == 1) | |
719 | return 0; | |
720 | ||
721 | printk(KERN_WARNING "%s: %s side 80-wire cable detection failed, " | |
722 | "limiting max speed to UDMA33\n", | |
49521f97 BZ |
723 | drive->name, |
724 | hwif->cbl == ATA_CBL_PATA80 ? "drive" : "host"); | |
7f8f48af BZ |
725 | |
726 | drive->udma33_warned = 1; | |
727 | ||
728 | return 0; | |
1da177e4 LT |
729 | } |
730 | ||
8a455134 | 731 | int ide_driveid_update(ide_drive_t *drive) |
1da177e4 | 732 | { |
8a455134 | 733 | ide_hwif_t *hwif = drive->hwif; |
1da177e4 | 734 | struct hd_driveid *id; |
8a455134 | 735 | unsigned long timeout, flags; |
c47137a9 | 736 | u8 stat; |
1da177e4 | 737 | |
1da177e4 LT |
738 | /* |
739 | * Re-read drive->id for possible DMA mode | |
740 | * change (copied from ide-probe.c) | |
741 | */ | |
1da177e4 LT |
742 | |
743 | SELECT_MASK(drive, 1); | |
6e6afb3b | 744 | hwif->set_irq(hwif, 0); |
1da177e4 | 745 | msleep(50); |
c6dfa867 | 746 | hwif->exec_command(hwif, WIN_IDENTIFY); |
1da177e4 LT |
747 | timeout = jiffies + WAIT_WORSTCASE; |
748 | do { | |
749 | if (time_after(jiffies, timeout)) { | |
750 | SELECT_MASK(drive, 0); | |
751 | return 0; /* drive timed-out */ | |
752 | } | |
c47137a9 | 753 | |
1da177e4 | 754 | msleep(50); /* give drive a breather */ |
1f6d8a0f | 755 | stat = hwif->read_altstatus(hwif); |
c47137a9 BZ |
756 | } while (stat & BUSY_STAT); |
757 | ||
1da177e4 | 758 | msleep(50); /* wait for IRQ and DRQ_STAT */ |
b73c7ee2 | 759 | stat = hwif->read_status(hwif); |
c47137a9 BZ |
760 | |
761 | if (!OK_STAT(stat, DRQ_STAT, BAD_R_STAT)) { | |
1da177e4 LT |
762 | SELECT_MASK(drive, 0); |
763 | printk("%s: CHECK for good STATUS\n", drive->name); | |
764 | return 0; | |
765 | } | |
766 | local_irq_save(flags); | |
767 | SELECT_MASK(drive, 0); | |
768 | id = kmalloc(SECTOR_WORDS*4, GFP_ATOMIC); | |
769 | if (!id) { | |
770 | local_irq_restore(flags); | |
771 | return 0; | |
772 | } | |
9567b349 | 773 | hwif->input_data(drive, NULL, id, SECTOR_SIZE); |
b73c7ee2 | 774 | (void)hwif->read_status(hwif); /* clear drive IRQ */ |
1da177e4 LT |
775 | local_irq_enable(); |
776 | local_irq_restore(flags); | |
777 | ide_fix_driveid(id); | |
778 | if (id) { | |
779 | drive->id->dma_ultra = id->dma_ultra; | |
780 | drive->id->dma_mword = id->dma_mword; | |
781 | drive->id->dma_1word = id->dma_1word; | |
782 | /* anything more ? */ | |
783 | kfree(id); | |
3ab7efe8 BZ |
784 | |
785 | if (drive->using_dma && ide_id_dma_bug(drive)) | |
786 | ide_dma_off(drive); | |
1da177e4 LT |
787 | } |
788 | ||
789 | return 1; | |
1da177e4 LT |
790 | } |
791 | ||
74af21cf | 792 | int ide_config_drive_speed(ide_drive_t *drive, u8 speed) |
1da177e4 | 793 | { |
74af21cf | 794 | ide_hwif_t *hwif = drive->hwif; |
4c3032d8 | 795 | struct ide_io_ports *io_ports = &hwif->io_ports; |
89613e66 | 796 | int error = 0; |
1da177e4 LT |
797 | u8 stat; |
798 | ||
1da177e4 | 799 | #ifdef CONFIG_BLK_DEV_IDEDMA |
5e37bdc0 BZ |
800 | if (hwif->dma_ops) /* check if host supports DMA */ |
801 | hwif->dma_ops->dma_host_set(drive, 0); | |
1da177e4 LT |
802 | #endif |
803 | ||
89613e66 SS |
804 | /* Skip setting PIO flow-control modes on pre-EIDE drives */ |
805 | if ((speed & 0xf8) == XFER_PIO_0 && !(drive->id->capability & 0x08)) | |
806 | goto skip; | |
807 | ||
1da177e4 LT |
808 | /* |
809 | * Don't use ide_wait_cmd here - it will | |
810 | * attempt to set_geometry and recalibrate, | |
811 | * but for some reason these don't work at | |
812 | * this point (lost interrupt). | |
813 | */ | |
814 | /* | |
815 | * Select the drive, and issue the SETFEATURES command | |
816 | */ | |
817 | disable_irq_nosync(hwif->irq); | |
818 | ||
819 | /* | |
820 | * FIXME: we race against the running IRQ here if | |
821 | * this is called from non IRQ context. If we use | |
822 | * disable_irq() we hang on the error path. Work | |
823 | * is needed. | |
824 | */ | |
825 | ||
826 | udelay(1); | |
827 | SELECT_DRIVE(drive); | |
828 | SELECT_MASK(drive, 0); | |
829 | udelay(1); | |
6e6afb3b | 830 | hwif->set_irq(hwif, 0); |
4c3032d8 | 831 | hwif->OUTB(SETFEATURES_XFER, io_ports->feature_addr); |
3c09384e | 832 | hwif->OUTB(speed, io_ports->nsect_addr); |
c6dfa867 | 833 | hwif->exec_command(hwif, WIN_SETFEATURES); |
81ca6919 | 834 | if (drive->quirk_list == 2) |
6e6afb3b | 835 | hwif->set_irq(hwif, 1); |
1da177e4 | 836 | |
74af21cf BZ |
837 | error = __ide_wait_stat(drive, drive->ready_stat, |
838 | BUSY_STAT|DRQ_STAT|ERR_STAT, | |
839 | WAIT_CMD, &stat); | |
1da177e4 LT |
840 | |
841 | SELECT_MASK(drive, 0); | |
842 | ||
843 | enable_irq(hwif->irq); | |
844 | ||
845 | if (error) { | |
846 | (void) ide_dump_status(drive, "set_drive_speed_status", stat); | |
847 | return error; | |
848 | } | |
849 | ||
850 | drive->id->dma_ultra &= ~0xFF00; | |
851 | drive->id->dma_mword &= ~0x0F00; | |
852 | drive->id->dma_1word &= ~0x0F00; | |
853 | ||
89613e66 | 854 | skip: |
1da177e4 | 855 | #ifdef CONFIG_BLK_DEV_IDEDMA |
f37aaf9e BZ |
856 | if ((speed >= XFER_SW_DMA_0 || (hwif->host_flags & IDE_HFLAG_VDMA)) && |
857 | drive->using_dma) | |
5e37bdc0 BZ |
858 | hwif->dma_ops->dma_host_set(drive, 1); |
859 | else if (hwif->dma_ops) /* check if host supports DMA */ | |
4a546e04 | 860 | ide_dma_off_quietly(drive); |
1da177e4 LT |
861 | #endif |
862 | ||
863 | switch(speed) { | |
864 | case XFER_UDMA_7: drive->id->dma_ultra |= 0x8080; break; | |
865 | case XFER_UDMA_6: drive->id->dma_ultra |= 0x4040; break; | |
866 | case XFER_UDMA_5: drive->id->dma_ultra |= 0x2020; break; | |
867 | case XFER_UDMA_4: drive->id->dma_ultra |= 0x1010; break; | |
868 | case XFER_UDMA_3: drive->id->dma_ultra |= 0x0808; break; | |
869 | case XFER_UDMA_2: drive->id->dma_ultra |= 0x0404; break; | |
870 | case XFER_UDMA_1: drive->id->dma_ultra |= 0x0202; break; | |
871 | case XFER_UDMA_0: drive->id->dma_ultra |= 0x0101; break; | |
872 | case XFER_MW_DMA_2: drive->id->dma_mword |= 0x0404; break; | |
873 | case XFER_MW_DMA_1: drive->id->dma_mword |= 0x0202; break; | |
874 | case XFER_MW_DMA_0: drive->id->dma_mword |= 0x0101; break; | |
875 | case XFER_SW_DMA_2: drive->id->dma_1word |= 0x0404; break; | |
876 | case XFER_SW_DMA_1: drive->id->dma_1word |= 0x0202; break; | |
877 | case XFER_SW_DMA_0: drive->id->dma_1word |= 0x0101; break; | |
878 | default: break; | |
879 | } | |
880 | if (!drive->init_speed) | |
881 | drive->init_speed = speed; | |
882 | drive->current_speed = speed; | |
883 | return error; | |
884 | } | |
885 | ||
1da177e4 LT |
886 | /* |
887 | * This should get invoked any time we exit the driver to | |
888 | * wait for an interrupt response from a drive. handler() points | |
889 | * at the appropriate code to handle the next interrupt, and a | |
890 | * timer is started to prevent us from waiting forever in case | |
891 | * something goes wrong (see the ide_timer_expiry() handler later on). | |
892 | * | |
893 | * See also ide_execute_command | |
894 | */ | |
895 | static void __ide_set_handler (ide_drive_t *drive, ide_handler_t *handler, | |
896 | unsigned int timeout, ide_expiry_t *expiry) | |
897 | { | |
898 | ide_hwgroup_t *hwgroup = HWGROUP(drive); | |
899 | ||
d30a426d | 900 | BUG_ON(hwgroup->handler); |
1da177e4 LT |
901 | hwgroup->handler = handler; |
902 | hwgroup->expiry = expiry; | |
903 | hwgroup->timer.expires = jiffies + timeout; | |
d30a426d | 904 | hwgroup->req_gen_timer = hwgroup->req_gen; |
1da177e4 LT |
905 | add_timer(&hwgroup->timer); |
906 | } | |
907 | ||
908 | void ide_set_handler (ide_drive_t *drive, ide_handler_t *handler, | |
909 | unsigned int timeout, ide_expiry_t *expiry) | |
910 | { | |
911 | unsigned long flags; | |
912 | spin_lock_irqsave(&ide_lock, flags); | |
913 | __ide_set_handler(drive, handler, timeout, expiry); | |
914 | spin_unlock_irqrestore(&ide_lock, flags); | |
915 | } | |
916 | ||
917 | EXPORT_SYMBOL(ide_set_handler); | |
918 | ||
919 | /** | |
920 | * ide_execute_command - execute an IDE command | |
921 | * @drive: IDE drive to issue the command against | |
922 | * @command: command byte to write | |
923 | * @handler: handler for next phase | |
924 | * @timeout: timeout for command | |
925 | * @expiry: handler to run on timeout | |
926 | * | |
927 | * Helper function to issue an IDE command. This handles the | |
928 | * atomicity requirements, command timing and ensures that the | |
929 | * handler and IRQ setup do not race. All IDE command kick off | |
930 | * should go via this function or do equivalent locking. | |
931 | */ | |
cd2a2d96 BZ |
932 | |
933 | void ide_execute_command(ide_drive_t *drive, u8 cmd, ide_handler_t *handler, | |
934 | unsigned timeout, ide_expiry_t *expiry) | |
1da177e4 LT |
935 | { |
936 | unsigned long flags; | |
1da177e4 | 937 | ide_hwif_t *hwif = HWIF(drive); |
629f944b | 938 | |
1da177e4 | 939 | spin_lock_irqsave(&ide_lock, flags); |
629f944b | 940 | __ide_set_handler(drive, handler, timeout, expiry); |
c6dfa867 | 941 | hwif->exec_command(hwif, cmd); |
629f944b BZ |
942 | /* |
943 | * Drive takes 400nS to respond, we must avoid the IRQ being | |
944 | * serviced before that. | |
945 | * | |
946 | * FIXME: we could skip this delay with care on non shared devices | |
947 | */ | |
1da177e4 LT |
948 | ndelay(400); |
949 | spin_unlock_irqrestore(&ide_lock, flags); | |
950 | } | |
1da177e4 LT |
951 | EXPORT_SYMBOL(ide_execute_command); |
952 | ||
1fc14258 BZ |
953 | void ide_execute_pkt_cmd(ide_drive_t *drive) |
954 | { | |
955 | ide_hwif_t *hwif = drive->hwif; | |
956 | unsigned long flags; | |
957 | ||
958 | spin_lock_irqsave(&ide_lock, flags); | |
c6dfa867 | 959 | hwif->exec_command(hwif, WIN_PACKETCMD); |
1fc14258 BZ |
960 | ndelay(400); |
961 | spin_unlock_irqrestore(&ide_lock, flags); | |
962 | } | |
963 | EXPORT_SYMBOL_GPL(ide_execute_pkt_cmd); | |
1da177e4 | 964 | |
64a8f00f | 965 | static inline void ide_complete_drive_reset(ide_drive_t *drive, int err) |
79e36a9f EO |
966 | { |
967 | struct request *rq = drive->hwif->hwgroup->rq; | |
968 | ||
969 | if (rq && blk_special_request(rq) && rq->cmd[0] == REQ_DRIVE_RESET) | |
64a8f00f | 970 | ide_end_request(drive, err ? err : 1, 0); |
79e36a9f EO |
971 | } |
972 | ||
1da177e4 LT |
973 | /* needed below */ |
974 | static ide_startstop_t do_reset1 (ide_drive_t *, int); | |
975 | ||
976 | /* | |
977 | * atapi_reset_pollfunc() gets invoked to poll the interface for completion every 50ms | |
978 | * during an atapi drive reset operation. If the drive has not yet responded, | |
979 | * and we have not yet hit our maximum waiting time, then the timer is restarted | |
980 | * for another 50ms. | |
981 | */ | |
982 | static ide_startstop_t atapi_reset_pollfunc (ide_drive_t *drive) | |
983 | { | |
b73c7ee2 BZ |
984 | ide_hwif_t *hwif = drive->hwif; |
985 | ide_hwgroup_t *hwgroup = hwif->hwgroup; | |
1da177e4 LT |
986 | u8 stat; |
987 | ||
988 | SELECT_DRIVE(drive); | |
989 | udelay (10); | |
b73c7ee2 | 990 | stat = hwif->read_status(hwif); |
1da177e4 | 991 | |
c47137a9 | 992 | if (OK_STAT(stat, 0, BUSY_STAT)) |
1da177e4 | 993 | printk("%s: ATAPI reset complete\n", drive->name); |
c47137a9 | 994 | else { |
1da177e4 | 995 | if (time_before(jiffies, hwgroup->poll_timeout)) { |
1da177e4 LT |
996 | ide_set_handler(drive, &atapi_reset_pollfunc, HZ/20, NULL); |
997 | /* continue polling */ | |
998 | return ide_started; | |
999 | } | |
1000 | /* end of polling */ | |
1001 | hwgroup->polling = 0; | |
1002 | printk("%s: ATAPI reset timed-out, status=0x%02x\n", | |
1003 | drive->name, stat); | |
1004 | /* do it the old fashioned way */ | |
1005 | return do_reset1(drive, 1); | |
1006 | } | |
1007 | /* done polling */ | |
1008 | hwgroup->polling = 0; | |
64a8f00f | 1009 | ide_complete_drive_reset(drive, 0); |
1da177e4 LT |
1010 | return ide_stopped; |
1011 | } | |
1012 | ||
1013 | /* | |
1014 | * reset_pollfunc() gets invoked to poll the interface for completion every 50ms | |
1015 | * during an ide reset operation. If the drives have not yet responded, | |
1016 | * and we have not yet hit our maximum waiting time, then the timer is restarted | |
1017 | * for another 50ms. | |
1018 | */ | |
1019 | static ide_startstop_t reset_pollfunc (ide_drive_t *drive) | |
1020 | { | |
1021 | ide_hwgroup_t *hwgroup = HWGROUP(drive); | |
1022 | ide_hwif_t *hwif = HWIF(drive); | |
ac95beed | 1023 | const struct ide_port_ops *port_ops = hwif->port_ops; |
1da177e4 | 1024 | u8 tmp; |
64a8f00f | 1025 | int err = 0; |
1da177e4 | 1026 | |
ac95beed | 1027 | if (port_ops && port_ops->reset_poll) { |
64a8f00f EO |
1028 | err = port_ops->reset_poll(drive); |
1029 | if (err) { | |
1da177e4 LT |
1030 | printk(KERN_ERR "%s: host reset_poll failure for %s.\n", |
1031 | hwif->name, drive->name); | |
79e36a9f | 1032 | goto out; |
1da177e4 LT |
1033 | } |
1034 | } | |
1035 | ||
b73c7ee2 | 1036 | tmp = hwif->read_status(hwif); |
c47137a9 BZ |
1037 | |
1038 | if (!OK_STAT(tmp, 0, BUSY_STAT)) { | |
1da177e4 | 1039 | if (time_before(jiffies, hwgroup->poll_timeout)) { |
1da177e4 LT |
1040 | ide_set_handler(drive, &reset_pollfunc, HZ/20, NULL); |
1041 | /* continue polling */ | |
1042 | return ide_started; | |
1043 | } | |
1044 | printk("%s: reset timed-out, status=0x%02x\n", hwif->name, tmp); | |
1045 | drive->failures++; | |
64a8f00f | 1046 | err = -EIO; |
1da177e4 LT |
1047 | } else { |
1048 | printk("%s: reset: ", hwif->name); | |
64a57fe4 BZ |
1049 | tmp = ide_read_error(drive); |
1050 | ||
1051 | if (tmp == 1) { | |
1da177e4 LT |
1052 | printk("success\n"); |
1053 | drive->failures = 0; | |
1054 | } else { | |
1055 | drive->failures++; | |
1056 | printk("master: "); | |
1057 | switch (tmp & 0x7f) { | |
1058 | case 1: printk("passed"); | |
1059 | break; | |
1060 | case 2: printk("formatter device error"); | |
1061 | break; | |
1062 | case 3: printk("sector buffer error"); | |
1063 | break; | |
1064 | case 4: printk("ECC circuitry error"); | |
1065 | break; | |
1066 | case 5: printk("controlling MPU error"); | |
1067 | break; | |
1068 | default:printk("error (0x%02x?)", tmp); | |
1069 | } | |
1070 | if (tmp & 0x80) | |
1071 | printk("; slave: failed"); | |
1072 | printk("\n"); | |
64a8f00f | 1073 | err = -EIO; |
1da177e4 LT |
1074 | } |
1075 | } | |
79e36a9f | 1076 | out: |
64a8f00f EO |
1077 | hwgroup->polling = 0; /* done polling */ |
1078 | ide_complete_drive_reset(drive, err); | |
1da177e4 LT |
1079 | return ide_stopped; |
1080 | } | |
1081 | ||
1da177e4 LT |
1082 | static void ide_disk_pre_reset(ide_drive_t *drive) |
1083 | { | |
1084 | int legacy = (drive->id->cfs_enable_2 & 0x0400) ? 0 : 1; | |
1085 | ||
1086 | drive->special.all = 0; | |
1087 | drive->special.b.set_geometry = legacy; | |
1088 | drive->special.b.recalibrate = legacy; | |
4ee06b7e | 1089 | drive->mult_count = 0; |
1da177e4 LT |
1090 | if (!drive->keep_settings && !drive->using_dma) |
1091 | drive->mult_req = 0; | |
1092 | if (drive->mult_req != drive->mult_count) | |
1093 | drive->special.b.set_multmode = 1; | |
1094 | } | |
1095 | ||
1096 | static void pre_reset(ide_drive_t *drive) | |
1097 | { | |
ac95beed BZ |
1098 | const struct ide_port_ops *port_ops = drive->hwif->port_ops; |
1099 | ||
1da177e4 LT |
1100 | if (drive->media == ide_disk) |
1101 | ide_disk_pre_reset(drive); | |
1102 | else | |
1103 | drive->post_reset = 1; | |
1104 | ||
99ffbe0e BZ |
1105 | if (drive->using_dma) { |
1106 | if (drive->crc_count) | |
578cfa0d | 1107 | ide_check_dma_crc(drive); |
99ffbe0e BZ |
1108 | else |
1109 | ide_dma_off(drive); | |
1110 | } | |
1111 | ||
1112 | if (!drive->keep_settings) { | |
1113 | if (!drive->using_dma) { | |
1da177e4 LT |
1114 | drive->unmask = 0; |
1115 | drive->io_32bit = 0; | |
1116 | } | |
1117 | return; | |
1118 | } | |
1da177e4 | 1119 | |
ac95beed BZ |
1120 | if (port_ops && port_ops->pre_reset) |
1121 | port_ops->pre_reset(drive); | |
1da177e4 | 1122 | |
513daadd SS |
1123 | if (drive->current_speed != 0xff) |
1124 | drive->desired_speed = drive->current_speed; | |
1125 | drive->current_speed = 0xff; | |
1da177e4 LT |
1126 | } |
1127 | ||
1128 | /* | |
1129 | * do_reset1() attempts to recover a confused drive by resetting it. | |
1130 | * Unfortunately, resetting a disk drive actually resets all devices on | |
1131 | * the same interface, so it can really be thought of as resetting the | |
1132 | * interface rather than resetting the drive. | |
1133 | * | |
1134 | * ATAPI devices have their own reset mechanism which allows them to be | |
1135 | * individually reset without clobbering other devices on the same interface. | |
1136 | * | |
1137 | * Unfortunately, the IDE interface does not generate an interrupt to let | |
1138 | * us know when the reset operation has finished, so we must poll for this. | |
1139 | * Equally poor, though, is the fact that this may a very long time to complete, | |
1140 | * (up to 30 seconds worstcase). So, instead of busy-waiting here for it, | |
1141 | * we set a timer to poll at 50ms intervals. | |
1142 | */ | |
1143 | static ide_startstop_t do_reset1 (ide_drive_t *drive, int do_not_try_atapi) | |
1144 | { | |
1145 | unsigned int unit; | |
1146 | unsigned long flags; | |
1147 | ide_hwif_t *hwif; | |
1148 | ide_hwgroup_t *hwgroup; | |
4c3032d8 | 1149 | struct ide_io_ports *io_ports; |
ac95beed | 1150 | const struct ide_port_ops *port_ops; |
23579a2a | 1151 | |
1da177e4 LT |
1152 | spin_lock_irqsave(&ide_lock, flags); |
1153 | hwif = HWIF(drive); | |
1154 | hwgroup = HWGROUP(drive); | |
1155 | ||
4c3032d8 BZ |
1156 | io_ports = &hwif->io_ports; |
1157 | ||
1da177e4 | 1158 | /* We must not reset with running handlers */ |
125e1874 | 1159 | BUG_ON(hwgroup->handler != NULL); |
1da177e4 LT |
1160 | |
1161 | /* For an ATAPI device, first try an ATAPI SRST. */ | |
1162 | if (drive->media != ide_disk && !do_not_try_atapi) { | |
1163 | pre_reset(drive); | |
1164 | SELECT_DRIVE(drive); | |
1165 | udelay (20); | |
c6dfa867 | 1166 | hwif->exec_command(hwif, WIN_SRST); |
68ad9910 | 1167 | ndelay(400); |
1da177e4 LT |
1168 | hwgroup->poll_timeout = jiffies + WAIT_WORSTCASE; |
1169 | hwgroup->polling = 1; | |
1170 | __ide_set_handler(drive, &atapi_reset_pollfunc, HZ/20, NULL); | |
1171 | spin_unlock_irqrestore(&ide_lock, flags); | |
1172 | return ide_started; | |
1173 | } | |
1174 | ||
1175 | /* | |
1176 | * First, reset any device state data we were maintaining | |
1177 | * for any of the drives on this interface. | |
1178 | */ | |
1179 | for (unit = 0; unit < MAX_DRIVES; ++unit) | |
1180 | pre_reset(&hwif->drives[unit]); | |
1181 | ||
4c3032d8 | 1182 | if (io_ports->ctl_addr == 0) { |
1da177e4 | 1183 | spin_unlock_irqrestore(&ide_lock, flags); |
64a8f00f | 1184 | ide_complete_drive_reset(drive, -ENXIO); |
1da177e4 LT |
1185 | return ide_stopped; |
1186 | } | |
1187 | ||
1188 | /* | |
1189 | * Note that we also set nIEN while resetting the device, | |
1190 | * to mask unwanted interrupts from the interface during the reset. | |
1191 | * However, due to the design of PC hardware, this will cause an | |
1192 | * immediate interrupt due to the edge transition it produces. | |
1193 | * This single interrupt gives us a "fast poll" for drives that | |
1194 | * recover from reset very quickly, saving us the first 50ms wait time. | |
6e6afb3b BZ |
1195 | * |
1196 | * TODO: add ->softreset method and stop abusing ->set_irq | |
1da177e4 LT |
1197 | */ |
1198 | /* set SRST and nIEN */ | |
6e6afb3b | 1199 | hwif->set_irq(hwif, 4); |
1da177e4 LT |
1200 | /* more than enough time */ |
1201 | udelay(10); | |
6e6afb3b BZ |
1202 | /* clear SRST, leave nIEN (unless device is on the quirk list) */ |
1203 | hwif->set_irq(hwif, drive->quirk_list == 2); | |
1da177e4 LT |
1204 | /* more than enough time */ |
1205 | udelay(10); | |
1206 | hwgroup->poll_timeout = jiffies + WAIT_WORSTCASE; | |
1207 | hwgroup->polling = 1; | |
1208 | __ide_set_handler(drive, &reset_pollfunc, HZ/20, NULL); | |
1209 | ||
1210 | /* | |
1211 | * Some weird controller like resetting themselves to a strange | |
1212 | * state when the disks are reset this way. At least, the Winbond | |
1213 | * 553 documentation says that | |
1214 | */ | |
ac95beed BZ |
1215 | port_ops = hwif->port_ops; |
1216 | if (port_ops && port_ops->resetproc) | |
1217 | port_ops->resetproc(drive); | |
1da177e4 LT |
1218 | |
1219 | spin_unlock_irqrestore(&ide_lock, flags); | |
1220 | return ide_started; | |
1221 | } | |
1222 | ||
1223 | /* | |
1224 | * ide_do_reset() is the entry point to the drive/interface reset code. | |
1225 | */ | |
1226 | ||
1227 | ide_startstop_t ide_do_reset (ide_drive_t *drive) | |
1228 | { | |
1229 | return do_reset1(drive, 0); | |
1230 | } | |
1231 | ||
1232 | EXPORT_SYMBOL(ide_do_reset); | |
1233 | ||
1234 | /* | |
1235 | * ide_wait_not_busy() waits for the currently selected device on the hwif | |
9d501529 | 1236 | * to report a non-busy status, see comments in ide_probe_port(). |
1da177e4 LT |
1237 | */ |
1238 | int ide_wait_not_busy(ide_hwif_t *hwif, unsigned long timeout) | |
1239 | { | |
1240 | u8 stat = 0; | |
1241 | ||
1242 | while(timeout--) { | |
1243 | /* | |
1244 | * Turn this into a schedule() sleep once I'm sure | |
1245 | * about locking issues (2.5 work ?). | |
1246 | */ | |
1247 | mdelay(1); | |
b73c7ee2 | 1248 | stat = hwif->read_status(hwif); |
1da177e4 LT |
1249 | if ((stat & BUSY_STAT) == 0) |
1250 | return 0; | |
1251 | /* | |
1252 | * Assume a value of 0xff means nothing is connected to | |
1253 | * the interface and it doesn't implement the pull-down | |
1254 | * resistor on D7. | |
1255 | */ | |
1256 | if (stat == 0xff) | |
1257 | return -ENODEV; | |
6842f8c8 | 1258 | touch_softlockup_watchdog(); |
1e86240f | 1259 | touch_nmi_watchdog(); |
1da177e4 LT |
1260 | } |
1261 | return -EBUSY; | |
1262 | } | |
1263 | ||
1264 | EXPORT_SYMBOL_GPL(ide_wait_not_busy); | |
1265 |