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 | ||
94cd5b62 | 106 | static void ide_tf_load(ide_drive_t *drive, ide_task_t *task) |
d309e0bb BZ |
107 | { |
108 | ide_hwif_t *hwif = drive->hwif; | |
109 | struct ide_io_ports *io_ports = &hwif->io_ports; | |
110 | struct ide_taskfile *tf = &task->tf; | |
ca545c1e BZ |
111 | void (*tf_outb)(u8 addr, unsigned long port); |
112 | u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0; | |
d309e0bb BZ |
113 | u8 HIHI = (task->tf_flags & IDE_TFLAG_LBA48) ? 0xE0 : 0xEF; |
114 | ||
ca545c1e BZ |
115 | if (mmio) |
116 | tf_outb = ide_mm_outb; | |
117 | else | |
118 | tf_outb = ide_outb; | |
119 | ||
d309e0bb BZ |
120 | if (task->tf_flags & IDE_TFLAG_FLAGGED) |
121 | HIHI = 0xFF; | |
122 | ||
ca545c1e BZ |
123 | if (task->tf_flags & IDE_TFLAG_OUT_DATA) { |
124 | u16 data = (tf->hob_data << 8) | tf->data; | |
125 | ||
126 | if (mmio) | |
127 | writew(data, (void __iomem *)io_ports->data_addr); | |
128 | else | |
129 | outw(data, io_ports->data_addr); | |
130 | } | |
d309e0bb BZ |
131 | |
132 | if (task->tf_flags & IDE_TFLAG_OUT_HOB_FEATURE) | |
ca545c1e | 133 | tf_outb(tf->hob_feature, io_ports->feature_addr); |
d309e0bb | 134 | if (task->tf_flags & IDE_TFLAG_OUT_HOB_NSECT) |
ca545c1e | 135 | tf_outb(tf->hob_nsect, io_ports->nsect_addr); |
d309e0bb | 136 | if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAL) |
ca545c1e | 137 | tf_outb(tf->hob_lbal, io_ports->lbal_addr); |
d309e0bb | 138 | if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAM) |
ca545c1e | 139 | tf_outb(tf->hob_lbam, io_ports->lbam_addr); |
d309e0bb | 140 | if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAH) |
ca545c1e | 141 | tf_outb(tf->hob_lbah, io_ports->lbah_addr); |
d309e0bb BZ |
142 | |
143 | if (task->tf_flags & IDE_TFLAG_OUT_FEATURE) | |
ca545c1e | 144 | tf_outb(tf->feature, io_ports->feature_addr); |
d309e0bb | 145 | if (task->tf_flags & IDE_TFLAG_OUT_NSECT) |
ca545c1e | 146 | tf_outb(tf->nsect, io_ports->nsect_addr); |
d309e0bb | 147 | if (task->tf_flags & IDE_TFLAG_OUT_LBAL) |
ca545c1e | 148 | tf_outb(tf->lbal, io_ports->lbal_addr); |
d309e0bb | 149 | if (task->tf_flags & IDE_TFLAG_OUT_LBAM) |
ca545c1e | 150 | tf_outb(tf->lbam, io_ports->lbam_addr); |
d309e0bb | 151 | if (task->tf_flags & IDE_TFLAG_OUT_LBAH) |
ca545c1e | 152 | tf_outb(tf->lbah, io_ports->lbah_addr); |
d309e0bb BZ |
153 | |
154 | if (task->tf_flags & IDE_TFLAG_OUT_DEVICE) | |
ca545c1e BZ |
155 | tf_outb((tf->device & HIHI) | drive->select.all, |
156 | io_ports->device_addr); | |
d309e0bb BZ |
157 | } |
158 | ||
94cd5b62 | 159 | static void ide_tf_read(ide_drive_t *drive, ide_task_t *task) |
d309e0bb BZ |
160 | { |
161 | ide_hwif_t *hwif = drive->hwif; | |
162 | struct ide_io_ports *io_ports = &hwif->io_ports; | |
163 | struct ide_taskfile *tf = &task->tf; | |
ca545c1e BZ |
164 | void (*tf_outb)(u8 addr, unsigned long port); |
165 | u8 (*tf_inb)(unsigned long port); | |
166 | u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0; | |
167 | ||
168 | if (mmio) { | |
169 | tf_outb = ide_mm_outb; | |
170 | tf_inb = ide_mm_inb; | |
171 | } else { | |
172 | tf_outb = ide_outb; | |
173 | tf_inb = ide_inb; | |
174 | } | |
d309e0bb BZ |
175 | |
176 | if (task->tf_flags & IDE_TFLAG_IN_DATA) { | |
ca545c1e BZ |
177 | u16 data; |
178 | ||
179 | if (mmio) | |
180 | data = readw((void __iomem *)io_ports->data_addr); | |
181 | else | |
182 | data = inw(io_ports->data_addr); | |
d309e0bb BZ |
183 | |
184 | tf->data = data & 0xff; | |
185 | tf->hob_data = (data >> 8) & 0xff; | |
186 | } | |
187 | ||
188 | /* be sure we're looking at the low order bits */ | |
ff074883 | 189 | tf_outb(ATA_DEVCTL_OBS & ~0x80, io_ports->ctl_addr); |
d309e0bb BZ |
190 | |
191 | if (task->tf_flags & IDE_TFLAG_IN_NSECT) | |
ca545c1e | 192 | tf->nsect = tf_inb(io_ports->nsect_addr); |
d309e0bb | 193 | if (task->tf_flags & IDE_TFLAG_IN_LBAL) |
ca545c1e | 194 | tf->lbal = tf_inb(io_ports->lbal_addr); |
d309e0bb | 195 | if (task->tf_flags & IDE_TFLAG_IN_LBAM) |
ca545c1e | 196 | tf->lbam = tf_inb(io_ports->lbam_addr); |
d309e0bb | 197 | if (task->tf_flags & IDE_TFLAG_IN_LBAH) |
ca545c1e | 198 | tf->lbah = tf_inb(io_ports->lbah_addr); |
d309e0bb | 199 | if (task->tf_flags & IDE_TFLAG_IN_DEVICE) |
ca545c1e | 200 | tf->device = tf_inb(io_ports->device_addr); |
d309e0bb BZ |
201 | |
202 | if (task->tf_flags & IDE_TFLAG_LBA48) { | |
ff074883 | 203 | tf_outb(ATA_DEVCTL_OBS | 0x80, io_ports->ctl_addr); |
d309e0bb BZ |
204 | |
205 | if (task->tf_flags & IDE_TFLAG_IN_HOB_FEATURE) | |
ca545c1e | 206 | tf->hob_feature = tf_inb(io_ports->feature_addr); |
d309e0bb | 207 | if (task->tf_flags & IDE_TFLAG_IN_HOB_NSECT) |
ca545c1e | 208 | tf->hob_nsect = tf_inb(io_ports->nsect_addr); |
d309e0bb | 209 | if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAL) |
ca545c1e | 210 | tf->hob_lbal = tf_inb(io_ports->lbal_addr); |
d309e0bb | 211 | if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAM) |
ca545c1e | 212 | tf->hob_lbam = tf_inb(io_ports->lbam_addr); |
d309e0bb | 213 | if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAH) |
ca545c1e | 214 | tf->hob_lbah = tf_inb(io_ports->lbah_addr); |
d309e0bb BZ |
215 | } |
216 | } | |
217 | ||
1da177e4 LT |
218 | /* |
219 | * Some localbus EIDE interfaces require a special access sequence | |
220 | * when using 32-bit I/O instructions to transfer data. We call this | |
221 | * the "vlb_sync" sequence, which consists of three successive reads | |
222 | * of the sector count register location, with interrupts disabled | |
223 | * to ensure that the reads all happen together. | |
224 | */ | |
22cdd6ce | 225 | static void ata_vlb_sync(unsigned long port) |
1da177e4 | 226 | { |
22cdd6ce BZ |
227 | (void)inb(port); |
228 | (void)inb(port); | |
229 | (void)inb(port); | |
1da177e4 LT |
230 | } |
231 | ||
232 | /* | |
233 | * This is used for most PIO data transfers *from* the IDE interface | |
9567b349 BZ |
234 | * |
235 | * These routines will round up any request for an odd number of bytes, | |
236 | * so if an odd len is specified, be sure that there's at least one | |
237 | * extra byte allocated for the buffer. | |
1da177e4 | 238 | */ |
92d3ab27 | 239 | static void ata_input_data(ide_drive_t *drive, struct request *rq, |
9567b349 | 240 | void *buf, unsigned int len) |
1da177e4 | 241 | { |
4c3032d8 BZ |
242 | ide_hwif_t *hwif = drive->hwif; |
243 | struct ide_io_ports *io_ports = &hwif->io_ports; | |
9567b349 | 244 | unsigned long data_addr = io_ports->data_addr; |
4c3032d8 | 245 | u8 io_32bit = drive->io_32bit; |
16bb69c1 | 246 | u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0; |
1da177e4 | 247 | |
9567b349 BZ |
248 | len++; |
249 | ||
1da177e4 | 250 | if (io_32bit) { |
16bb69c1 | 251 | unsigned long uninitialized_var(flags); |
23579a2a | 252 | |
22cdd6ce | 253 | if ((io_32bit & 2) && !mmio) { |
1da177e4 | 254 | local_irq_save(flags); |
22cdd6ce | 255 | ata_vlb_sync(io_ports->nsect_addr); |
16bb69c1 BZ |
256 | } |
257 | ||
258 | if (mmio) | |
259 | __ide_mm_insl((void __iomem *)data_addr, buf, len / 4); | |
260 | else | |
261 | insl(data_addr, buf, len / 4); | |
262 | ||
22cdd6ce | 263 | if ((io_32bit & 2) && !mmio) |
1da177e4 | 264 | local_irq_restore(flags); |
9567b349 | 265 | |
16bb69c1 BZ |
266 | if ((len & 3) >= 2) { |
267 | if (mmio) | |
268 | __ide_mm_insw((void __iomem *)data_addr, | |
269 | (u8 *)buf + (len & ~3), 1); | |
270 | else | |
271 | insw(data_addr, (u8 *)buf + (len & ~3), 1); | |
272 | } | |
273 | } else { | |
274 | if (mmio) | |
275 | __ide_mm_insw((void __iomem *)data_addr, buf, len / 2); | |
276 | else | |
277 | insw(data_addr, buf, len / 2); | |
278 | } | |
1da177e4 LT |
279 | } |
280 | ||
281 | /* | |
282 | * This is used for most PIO data transfers *to* the IDE interface | |
283 | */ | |
92d3ab27 | 284 | static void ata_output_data(ide_drive_t *drive, struct request *rq, |
9567b349 | 285 | void *buf, unsigned int len) |
1da177e4 | 286 | { |
4c3032d8 BZ |
287 | ide_hwif_t *hwif = drive->hwif; |
288 | struct ide_io_ports *io_ports = &hwif->io_ports; | |
9567b349 | 289 | unsigned long data_addr = io_ports->data_addr; |
4c3032d8 | 290 | u8 io_32bit = drive->io_32bit; |
16bb69c1 | 291 | u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0; |
1da177e4 LT |
292 | |
293 | if (io_32bit) { | |
16bb69c1 | 294 | unsigned long uninitialized_var(flags); |
23579a2a | 295 | |
22cdd6ce | 296 | if ((io_32bit & 2) && !mmio) { |
1da177e4 | 297 | local_irq_save(flags); |
22cdd6ce | 298 | ata_vlb_sync(io_ports->nsect_addr); |
16bb69c1 BZ |
299 | } |
300 | ||
301 | if (mmio) | |
302 | __ide_mm_outsl((void __iomem *)data_addr, buf, len / 4); | |
303 | else | |
304 | outsl(data_addr, buf, len / 4); | |
305 | ||
22cdd6ce | 306 | if ((io_32bit & 2) && !mmio) |
1da177e4 | 307 | local_irq_restore(flags); |
1da177e4 | 308 | |
16bb69c1 BZ |
309 | if ((len & 3) >= 2) { |
310 | if (mmio) | |
311 | __ide_mm_outsw((void __iomem *)data_addr, | |
312 | (u8 *)buf + (len & ~3), 1); | |
313 | else | |
314 | outsw(data_addr, (u8 *)buf + (len & ~3), 1); | |
315 | } | |
316 | } else { | |
317 | if (mmio) | |
318 | __ide_mm_outsw((void __iomem *)data_addr, buf, len / 2); | |
319 | else | |
320 | outsw(data_addr, buf, len / 2); | |
321 | } | |
1da177e4 LT |
322 | } |
323 | ||
324 | void default_hwif_transport(ide_hwif_t *hwif) | |
325 | { | |
94cd5b62 BZ |
326 | hwif->tf_load = ide_tf_load; |
327 | hwif->tf_read = ide_tf_read; | |
328 | ||
9567b349 BZ |
329 | hwif->input_data = ata_input_data; |
330 | hwif->output_data = ata_output_data; | |
1da177e4 LT |
331 | } |
332 | ||
1da177e4 LT |
333 | void ide_fix_driveid (struct hd_driveid *id) |
334 | { | |
335 | #ifndef __LITTLE_ENDIAN | |
336 | # ifdef __BIG_ENDIAN | |
337 | int i; | |
338 | u16 *stringcast; | |
339 | ||
340 | id->config = __le16_to_cpu(id->config); | |
341 | id->cyls = __le16_to_cpu(id->cyls); | |
342 | id->reserved2 = __le16_to_cpu(id->reserved2); | |
343 | id->heads = __le16_to_cpu(id->heads); | |
344 | id->track_bytes = __le16_to_cpu(id->track_bytes); | |
345 | id->sector_bytes = __le16_to_cpu(id->sector_bytes); | |
346 | id->sectors = __le16_to_cpu(id->sectors); | |
347 | id->vendor0 = __le16_to_cpu(id->vendor0); | |
348 | id->vendor1 = __le16_to_cpu(id->vendor1); | |
349 | id->vendor2 = __le16_to_cpu(id->vendor2); | |
350 | stringcast = (u16 *)&id->serial_no[0]; | |
351 | for (i = 0; i < (20/2); i++) | |
352 | stringcast[i] = __le16_to_cpu(stringcast[i]); | |
353 | id->buf_type = __le16_to_cpu(id->buf_type); | |
354 | id->buf_size = __le16_to_cpu(id->buf_size); | |
355 | id->ecc_bytes = __le16_to_cpu(id->ecc_bytes); | |
356 | stringcast = (u16 *)&id->fw_rev[0]; | |
357 | for (i = 0; i < (8/2); i++) | |
358 | stringcast[i] = __le16_to_cpu(stringcast[i]); | |
359 | stringcast = (u16 *)&id->model[0]; | |
360 | for (i = 0; i < (40/2); i++) | |
361 | stringcast[i] = __le16_to_cpu(stringcast[i]); | |
362 | id->dword_io = __le16_to_cpu(id->dword_io); | |
363 | id->reserved50 = __le16_to_cpu(id->reserved50); | |
364 | id->field_valid = __le16_to_cpu(id->field_valid); | |
365 | id->cur_cyls = __le16_to_cpu(id->cur_cyls); | |
366 | id->cur_heads = __le16_to_cpu(id->cur_heads); | |
367 | id->cur_sectors = __le16_to_cpu(id->cur_sectors); | |
368 | id->cur_capacity0 = __le16_to_cpu(id->cur_capacity0); | |
369 | id->cur_capacity1 = __le16_to_cpu(id->cur_capacity1); | |
370 | id->lba_capacity = __le32_to_cpu(id->lba_capacity); | |
371 | id->dma_1word = __le16_to_cpu(id->dma_1word); | |
372 | id->dma_mword = __le16_to_cpu(id->dma_mword); | |
373 | id->eide_pio_modes = __le16_to_cpu(id->eide_pio_modes); | |
374 | id->eide_dma_min = __le16_to_cpu(id->eide_dma_min); | |
375 | id->eide_dma_time = __le16_to_cpu(id->eide_dma_time); | |
376 | id->eide_pio = __le16_to_cpu(id->eide_pio); | |
377 | id->eide_pio_iordy = __le16_to_cpu(id->eide_pio_iordy); | |
378 | for (i = 0; i < 2; ++i) | |
379 | id->words69_70[i] = __le16_to_cpu(id->words69_70[i]); | |
380 | for (i = 0; i < 4; ++i) | |
381 | id->words71_74[i] = __le16_to_cpu(id->words71_74[i]); | |
382 | id->queue_depth = __le16_to_cpu(id->queue_depth); | |
383 | for (i = 0; i < 4; ++i) | |
384 | id->words76_79[i] = __le16_to_cpu(id->words76_79[i]); | |
385 | id->major_rev_num = __le16_to_cpu(id->major_rev_num); | |
386 | id->minor_rev_num = __le16_to_cpu(id->minor_rev_num); | |
387 | id->command_set_1 = __le16_to_cpu(id->command_set_1); | |
388 | id->command_set_2 = __le16_to_cpu(id->command_set_2); | |
389 | id->cfsse = __le16_to_cpu(id->cfsse); | |
390 | id->cfs_enable_1 = __le16_to_cpu(id->cfs_enable_1); | |
391 | id->cfs_enable_2 = __le16_to_cpu(id->cfs_enable_2); | |
392 | id->csf_default = __le16_to_cpu(id->csf_default); | |
393 | id->dma_ultra = __le16_to_cpu(id->dma_ultra); | |
394 | id->trseuc = __le16_to_cpu(id->trseuc); | |
395 | id->trsEuc = __le16_to_cpu(id->trsEuc); | |
396 | id->CurAPMvalues = __le16_to_cpu(id->CurAPMvalues); | |
397 | id->mprc = __le16_to_cpu(id->mprc); | |
398 | id->hw_config = __le16_to_cpu(id->hw_config); | |
399 | id->acoustic = __le16_to_cpu(id->acoustic); | |
400 | id->msrqs = __le16_to_cpu(id->msrqs); | |
401 | id->sxfert = __le16_to_cpu(id->sxfert); | |
402 | id->sal = __le16_to_cpu(id->sal); | |
403 | id->spg = __le32_to_cpu(id->spg); | |
404 | id->lba_capacity_2 = __le64_to_cpu(id->lba_capacity_2); | |
405 | for (i = 0; i < 22; i++) | |
406 | id->words104_125[i] = __le16_to_cpu(id->words104_125[i]); | |
407 | id->last_lun = __le16_to_cpu(id->last_lun); | |
408 | id->word127 = __le16_to_cpu(id->word127); | |
409 | id->dlf = __le16_to_cpu(id->dlf); | |
410 | id->csfo = __le16_to_cpu(id->csfo); | |
411 | for (i = 0; i < 26; i++) | |
412 | id->words130_155[i] = __le16_to_cpu(id->words130_155[i]); | |
413 | id->word156 = __le16_to_cpu(id->word156); | |
414 | for (i = 0; i < 3; i++) | |
415 | id->words157_159[i] = __le16_to_cpu(id->words157_159[i]); | |
416 | id->cfa_power = __le16_to_cpu(id->cfa_power); | |
417 | for (i = 0; i < 14; i++) | |
418 | id->words161_175[i] = __le16_to_cpu(id->words161_175[i]); | |
419 | for (i = 0; i < 31; i++) | |
420 | id->words176_205[i] = __le16_to_cpu(id->words176_205[i]); | |
421 | for (i = 0; i < 48; i++) | |
422 | id->words206_254[i] = __le16_to_cpu(id->words206_254[i]); | |
423 | id->integrity_word = __le16_to_cpu(id->integrity_word); | |
424 | # else | |
425 | # error "Please fix <asm/byteorder.h>" | |
426 | # endif | |
427 | #endif | |
428 | } | |
429 | ||
01745112 BZ |
430 | /* |
431 | * ide_fixstring() cleans up and (optionally) byte-swaps a text string, | |
432 | * removing leading/trailing blanks and compressing internal blanks. | |
433 | * It is primarily used to tidy up the model name/number fields as | |
434 | * returned by the WIN_[P]IDENTIFY commands. | |
435 | */ | |
436 | ||
1da177e4 LT |
437 | void ide_fixstring (u8 *s, const int bytecount, const int byteswap) |
438 | { | |
439 | u8 *p = s, *end = &s[bytecount & ~1]; /* bytecount must be even */ | |
440 | ||
441 | if (byteswap) { | |
442 | /* convert from big-endian to host byte order */ | |
443 | for (p = end ; p != s;) { | |
444 | unsigned short *pp = (unsigned short *) (p -= 2); | |
445 | *pp = ntohs(*pp); | |
446 | } | |
447 | } | |
448 | /* strip leading blanks */ | |
449 | while (s != end && *s == ' ') | |
450 | ++s; | |
451 | /* compress internal blanks and strip trailing blanks */ | |
452 | while (s != end && *s) { | |
453 | if (*s++ != ' ' || (s != end && *s && *s != ' ')) | |
454 | *p++ = *(s-1); | |
455 | } | |
456 | /* wipe out trailing garbage */ | |
457 | while (p != end) | |
458 | *p++ = '\0'; | |
459 | } | |
460 | ||
461 | EXPORT_SYMBOL(ide_fixstring); | |
462 | ||
463 | /* | |
464 | * Needed for PCI irq sharing | |
465 | */ | |
466 | int drive_is_ready (ide_drive_t *drive) | |
467 | { | |
468 | ide_hwif_t *hwif = HWIF(drive); | |
469 | u8 stat = 0; | |
470 | ||
471 | if (drive->waiting_for_dma) | |
5e37bdc0 | 472 | return hwif->dma_ops->dma_test_irq(drive); |
1da177e4 LT |
473 | |
474 | #if 0 | |
475 | /* need to guarantee 400ns since last command was issued */ | |
476 | udelay(1); | |
477 | #endif | |
478 | ||
1da177e4 LT |
479 | /* |
480 | * We do a passive status test under shared PCI interrupts on | |
481 | * cards that truly share the ATA side interrupt, but may also share | |
482 | * an interrupt with another pci card/device. We make no assumptions | |
483 | * about possible isa-pnp and pci-pnp issues yet. | |
484 | */ | |
4c3032d8 | 485 | if (hwif->io_ports.ctl_addr) |
c47137a9 | 486 | stat = ide_read_altstatus(drive); |
1da177e4 | 487 | else |
1da177e4 | 488 | /* Note: this may clear a pending IRQ!! */ |
c47137a9 | 489 | stat = ide_read_status(drive); |
1da177e4 LT |
490 | |
491 | if (stat & BUSY_STAT) | |
492 | /* drive busy: definitely not interrupting */ | |
493 | return 0; | |
494 | ||
495 | /* drive ready: *might* be interrupting */ | |
496 | return 1; | |
497 | } | |
498 | ||
499 | EXPORT_SYMBOL(drive_is_ready); | |
500 | ||
1da177e4 LT |
501 | /* |
502 | * This routine busy-waits for the drive status to be not "busy". | |
503 | * It then checks the status for all of the "good" bits and none | |
504 | * of the "bad" bits, and if all is okay it returns 0. All other | |
74af21cf | 505 | * cases return error -- caller may then invoke ide_error(). |
1da177e4 LT |
506 | * |
507 | * This routine should get fixed to not hog the cpu during extra long waits.. | |
508 | * That could be done by busy-waiting for the first jiffy or two, and then | |
509 | * setting a timer to wake up at half second intervals thereafter, | |
510 | * until timeout is achieved, before timing out. | |
511 | */ | |
aedea591 | 512 | static int __ide_wait_stat(ide_drive_t *drive, u8 good, u8 bad, unsigned long timeout, u8 *rstat) |
1da177e4 | 513 | { |
1da177e4 | 514 | unsigned long flags; |
74af21cf BZ |
515 | int i; |
516 | u8 stat; | |
1da177e4 LT |
517 | |
518 | udelay(1); /* spec allows drive 400ns to assert "BUSY" */ | |
c47137a9 BZ |
519 | stat = ide_read_status(drive); |
520 | ||
521 | if (stat & BUSY_STAT) { | |
1da177e4 LT |
522 | local_irq_set(flags); |
523 | timeout += jiffies; | |
c47137a9 | 524 | while ((stat = ide_read_status(drive)) & BUSY_STAT) { |
1da177e4 LT |
525 | if (time_after(jiffies, timeout)) { |
526 | /* | |
527 | * One last read after the timeout in case | |
528 | * heavy interrupt load made us not make any | |
529 | * progress during the timeout.. | |
530 | */ | |
c47137a9 | 531 | stat = ide_read_status(drive); |
1da177e4 LT |
532 | if (!(stat & BUSY_STAT)) |
533 | break; | |
534 | ||
535 | local_irq_restore(flags); | |
74af21cf BZ |
536 | *rstat = stat; |
537 | return -EBUSY; | |
1da177e4 LT |
538 | } |
539 | } | |
540 | local_irq_restore(flags); | |
541 | } | |
542 | /* | |
543 | * Allow status to settle, then read it again. | |
544 | * A few rare drives vastly violate the 400ns spec here, | |
545 | * so we'll wait up to 10usec for a "good" status | |
546 | * rather than expensively fail things immediately. | |
547 | * This fix courtesy of Matthew Faupel & Niccolo Rigacci. | |
548 | */ | |
549 | for (i = 0; i < 10; i++) { | |
550 | udelay(1); | |
c47137a9 BZ |
551 | stat = ide_read_status(drive); |
552 | ||
553 | if (OK_STAT(stat, good, bad)) { | |
74af21cf | 554 | *rstat = stat; |
1da177e4 | 555 | return 0; |
74af21cf | 556 | } |
1da177e4 | 557 | } |
74af21cf BZ |
558 | *rstat = stat; |
559 | return -EFAULT; | |
560 | } | |
561 | ||
562 | /* | |
563 | * In case of error returns error value after doing "*startstop = ide_error()". | |
564 | * The caller should return the updated value of "startstop" in this case, | |
565 | * "startstop" is unchanged when the function returns 0. | |
566 | */ | |
567 | int ide_wait_stat(ide_startstop_t *startstop, ide_drive_t *drive, u8 good, u8 bad, unsigned long timeout) | |
568 | { | |
569 | int err; | |
570 | u8 stat; | |
571 | ||
572 | /* bail early if we've exceeded max_failures */ | |
573 | if (drive->max_failures && (drive->failures > drive->max_failures)) { | |
574 | *startstop = ide_stopped; | |
575 | return 1; | |
576 | } | |
577 | ||
578 | err = __ide_wait_stat(drive, good, bad, timeout, &stat); | |
579 | ||
580 | if (err) { | |
581 | char *s = (err == -EBUSY) ? "status timeout" : "status error"; | |
582 | *startstop = ide_error(drive, s, stat); | |
583 | } | |
584 | ||
585 | return err; | |
1da177e4 LT |
586 | } |
587 | ||
588 | EXPORT_SYMBOL(ide_wait_stat); | |
589 | ||
a5b7e70d BZ |
590 | /** |
591 | * ide_in_drive_list - look for drive in black/white list | |
592 | * @id: drive identifier | |
593 | * @drive_table: list to inspect | |
594 | * | |
595 | * Look for a drive in the blacklist and the whitelist tables | |
596 | * Returns 1 if the drive is found in the table. | |
597 | */ | |
598 | ||
599 | int ide_in_drive_list(struct hd_driveid *id, const struct drive_list_entry *drive_table) | |
600 | { | |
601 | for ( ; drive_table->id_model; drive_table++) | |
602 | if ((!strcmp(drive_table->id_model, id->model)) && | |
603 | (!drive_table->id_firmware || | |
604 | strstr(id->fw_rev, drive_table->id_firmware))) | |
605 | return 1; | |
606 | return 0; | |
607 | } | |
608 | ||
b0244a00 BZ |
609 | EXPORT_SYMBOL_GPL(ide_in_drive_list); |
610 | ||
a5b7e70d BZ |
611 | /* |
612 | * Early UDMA66 devices don't set bit14 to 1, only bit13 is valid. | |
613 | * We list them here and depend on the device side cable detection for them. | |
8588a2b7 BZ |
614 | * |
615 | * Some optical devices with the buggy firmwares have the same problem. | |
a5b7e70d BZ |
616 | */ |
617 | static const struct drive_list_entry ivb_list[] = { | |
618 | { "QUANTUM FIREBALLlct10 05" , "A03.0900" }, | |
8588a2b7 | 619 | { "TSSTcorp CDDVDW SH-S202J" , "SB00" }, |
e97564f3 PM |
620 | { "TSSTcorp CDDVDW SH-S202J" , "SB01" }, |
621 | { "TSSTcorp CDDVDW SH-S202N" , "SB00" }, | |
622 | { "TSSTcorp CDDVDW SH-S202N" , "SB01" }, | |
3ced5c49 AS |
623 | { "TSSTcorp CDDVDW SH-S202H" , "SB00" }, |
624 | { "TSSTcorp CDDVDW SH-S202H" , "SB01" }, | |
a5b7e70d BZ |
625 | { NULL , NULL } |
626 | }; | |
627 | ||
1da177e4 LT |
628 | /* |
629 | * All hosts that use the 80c ribbon must use! | |
630 | * The name is derived from upper byte of word 93 and the 80c ribbon. | |
631 | */ | |
632 | u8 eighty_ninty_three (ide_drive_t *drive) | |
633 | { | |
7f8f48af BZ |
634 | ide_hwif_t *hwif = drive->hwif; |
635 | struct hd_driveid *id = drive->id; | |
a5b7e70d | 636 | int ivb = ide_in_drive_list(id, ivb_list); |
7f8f48af | 637 | |
49521f97 BZ |
638 | if (hwif->cbl == ATA_CBL_PATA40_SHORT) |
639 | return 1; | |
640 | ||
a5b7e70d BZ |
641 | if (ivb) |
642 | printk(KERN_DEBUG "%s: skipping word 93 validity check\n", | |
643 | drive->name); | |
644 | ||
b98f8803 GK |
645 | if (ide_dev_is_sata(id) && !ivb) |
646 | return 1; | |
647 | ||
a5b7e70d | 648 | if (hwif->cbl != ATA_CBL_PATA80 && !ivb) |
7f8f48af | 649 | goto no_80w; |
1a1276e7 | 650 | |
f68d9320 BZ |
651 | /* |
652 | * FIXME: | |
f367bed0 | 653 | * - change master/slave IDENTIFY order |
a5b7e70d | 654 | * - force bit13 (80c cable present) check also for !ivb devices |
f68d9320 BZ |
655 | * (unless the slave device is pre-ATA3) |
656 | */ | |
a5b7e70d | 657 | if ((id->hw_config & 0x4000) || (ivb && (id->hw_config & 0x2000))) |
7f8f48af BZ |
658 | return 1; |
659 | ||
660 | no_80w: | |
661 | if (drive->udma33_warned == 1) | |
662 | return 0; | |
663 | ||
664 | printk(KERN_WARNING "%s: %s side 80-wire cable detection failed, " | |
665 | "limiting max speed to UDMA33\n", | |
49521f97 BZ |
666 | drive->name, |
667 | hwif->cbl == ATA_CBL_PATA80 ? "drive" : "host"); | |
7f8f48af BZ |
668 | |
669 | drive->udma33_warned = 1; | |
670 | ||
671 | return 0; | |
1da177e4 LT |
672 | } |
673 | ||
8a455134 | 674 | int ide_driveid_update(ide_drive_t *drive) |
1da177e4 | 675 | { |
8a455134 | 676 | ide_hwif_t *hwif = drive->hwif; |
1da177e4 | 677 | struct hd_driveid *id; |
8a455134 | 678 | unsigned long timeout, flags; |
c47137a9 | 679 | u8 stat; |
1da177e4 | 680 | |
1da177e4 LT |
681 | /* |
682 | * Re-read drive->id for possible DMA mode | |
683 | * change (copied from ide-probe.c) | |
684 | */ | |
1da177e4 LT |
685 | |
686 | SELECT_MASK(drive, 1); | |
5ddee516 | 687 | ide_set_irq(drive, 0); |
1da177e4 | 688 | msleep(50); |
f8c4bd0a | 689 | hwif->OUTBSYNC(hwif, WIN_IDENTIFY, hwif->io_ports.command_addr); |
1da177e4 LT |
690 | timeout = jiffies + WAIT_WORSTCASE; |
691 | do { | |
692 | if (time_after(jiffies, timeout)) { | |
693 | SELECT_MASK(drive, 0); | |
694 | return 0; /* drive timed-out */ | |
695 | } | |
c47137a9 | 696 | |
1da177e4 | 697 | msleep(50); /* give drive a breather */ |
c47137a9 BZ |
698 | stat = ide_read_altstatus(drive); |
699 | } while (stat & BUSY_STAT); | |
700 | ||
1da177e4 | 701 | msleep(50); /* wait for IRQ and DRQ_STAT */ |
c47137a9 BZ |
702 | stat = ide_read_status(drive); |
703 | ||
704 | if (!OK_STAT(stat, DRQ_STAT, BAD_R_STAT)) { | |
1da177e4 LT |
705 | SELECT_MASK(drive, 0); |
706 | printk("%s: CHECK for good STATUS\n", drive->name); | |
707 | return 0; | |
708 | } | |
709 | local_irq_save(flags); | |
710 | SELECT_MASK(drive, 0); | |
711 | id = kmalloc(SECTOR_WORDS*4, GFP_ATOMIC); | |
712 | if (!id) { | |
713 | local_irq_restore(flags); | |
714 | return 0; | |
715 | } | |
9567b349 | 716 | hwif->input_data(drive, NULL, id, SECTOR_SIZE); |
c47137a9 | 717 | (void)ide_read_status(drive); /* clear drive IRQ */ |
1da177e4 LT |
718 | local_irq_enable(); |
719 | local_irq_restore(flags); | |
720 | ide_fix_driveid(id); | |
721 | if (id) { | |
722 | drive->id->dma_ultra = id->dma_ultra; | |
723 | drive->id->dma_mword = id->dma_mword; | |
724 | drive->id->dma_1word = id->dma_1word; | |
725 | /* anything more ? */ | |
726 | kfree(id); | |
3ab7efe8 BZ |
727 | |
728 | if (drive->using_dma && ide_id_dma_bug(drive)) | |
729 | ide_dma_off(drive); | |
1da177e4 LT |
730 | } |
731 | ||
732 | return 1; | |
1da177e4 LT |
733 | } |
734 | ||
74af21cf | 735 | int ide_config_drive_speed(ide_drive_t *drive, u8 speed) |
1da177e4 | 736 | { |
74af21cf | 737 | ide_hwif_t *hwif = drive->hwif; |
4c3032d8 | 738 | struct ide_io_ports *io_ports = &hwif->io_ports; |
89613e66 | 739 | int error = 0; |
1da177e4 LT |
740 | u8 stat; |
741 | ||
1da177e4 | 742 | #ifdef CONFIG_BLK_DEV_IDEDMA |
5e37bdc0 BZ |
743 | if (hwif->dma_ops) /* check if host supports DMA */ |
744 | hwif->dma_ops->dma_host_set(drive, 0); | |
1da177e4 LT |
745 | #endif |
746 | ||
89613e66 SS |
747 | /* Skip setting PIO flow-control modes on pre-EIDE drives */ |
748 | if ((speed & 0xf8) == XFER_PIO_0 && !(drive->id->capability & 0x08)) | |
749 | goto skip; | |
750 | ||
1da177e4 LT |
751 | /* |
752 | * Don't use ide_wait_cmd here - it will | |
753 | * attempt to set_geometry and recalibrate, | |
754 | * but for some reason these don't work at | |
755 | * this point (lost interrupt). | |
756 | */ | |
757 | /* | |
758 | * Select the drive, and issue the SETFEATURES command | |
759 | */ | |
760 | disable_irq_nosync(hwif->irq); | |
761 | ||
762 | /* | |
763 | * FIXME: we race against the running IRQ here if | |
764 | * this is called from non IRQ context. If we use | |
765 | * disable_irq() we hang on the error path. Work | |
766 | * is needed. | |
767 | */ | |
768 | ||
769 | udelay(1); | |
770 | SELECT_DRIVE(drive); | |
771 | SELECT_MASK(drive, 0); | |
772 | udelay(1); | |
81ca6919 | 773 | ide_set_irq(drive, 0); |
4c3032d8 BZ |
774 | hwif->OUTB(speed, io_ports->nsect_addr); |
775 | hwif->OUTB(SETFEATURES_XFER, io_ports->feature_addr); | |
f8c4bd0a | 776 | hwif->OUTBSYNC(hwif, WIN_SETFEATURES, io_ports->command_addr); |
81ca6919 BZ |
777 | if (drive->quirk_list == 2) |
778 | ide_set_irq(drive, 1); | |
1da177e4 | 779 | |
74af21cf BZ |
780 | error = __ide_wait_stat(drive, drive->ready_stat, |
781 | BUSY_STAT|DRQ_STAT|ERR_STAT, | |
782 | WAIT_CMD, &stat); | |
1da177e4 LT |
783 | |
784 | SELECT_MASK(drive, 0); | |
785 | ||
786 | enable_irq(hwif->irq); | |
787 | ||
788 | if (error) { | |
789 | (void) ide_dump_status(drive, "set_drive_speed_status", stat); | |
790 | return error; | |
791 | } | |
792 | ||
793 | drive->id->dma_ultra &= ~0xFF00; | |
794 | drive->id->dma_mword &= ~0x0F00; | |
795 | drive->id->dma_1word &= ~0x0F00; | |
796 | ||
89613e66 | 797 | skip: |
1da177e4 | 798 | #ifdef CONFIG_BLK_DEV_IDEDMA |
f37aaf9e BZ |
799 | if ((speed >= XFER_SW_DMA_0 || (hwif->host_flags & IDE_HFLAG_VDMA)) && |
800 | drive->using_dma) | |
5e37bdc0 BZ |
801 | hwif->dma_ops->dma_host_set(drive, 1); |
802 | else if (hwif->dma_ops) /* check if host supports DMA */ | |
4a546e04 | 803 | ide_dma_off_quietly(drive); |
1da177e4 LT |
804 | #endif |
805 | ||
806 | switch(speed) { | |
807 | case XFER_UDMA_7: drive->id->dma_ultra |= 0x8080; break; | |
808 | case XFER_UDMA_6: drive->id->dma_ultra |= 0x4040; break; | |
809 | case XFER_UDMA_5: drive->id->dma_ultra |= 0x2020; break; | |
810 | case XFER_UDMA_4: drive->id->dma_ultra |= 0x1010; break; | |
811 | case XFER_UDMA_3: drive->id->dma_ultra |= 0x0808; break; | |
812 | case XFER_UDMA_2: drive->id->dma_ultra |= 0x0404; break; | |
813 | case XFER_UDMA_1: drive->id->dma_ultra |= 0x0202; break; | |
814 | case XFER_UDMA_0: drive->id->dma_ultra |= 0x0101; break; | |
815 | case XFER_MW_DMA_2: drive->id->dma_mword |= 0x0404; break; | |
816 | case XFER_MW_DMA_1: drive->id->dma_mword |= 0x0202; break; | |
817 | case XFER_MW_DMA_0: drive->id->dma_mword |= 0x0101; break; | |
818 | case XFER_SW_DMA_2: drive->id->dma_1word |= 0x0404; break; | |
819 | case XFER_SW_DMA_1: drive->id->dma_1word |= 0x0202; break; | |
820 | case XFER_SW_DMA_0: drive->id->dma_1word |= 0x0101; break; | |
821 | default: break; | |
822 | } | |
823 | if (!drive->init_speed) | |
824 | drive->init_speed = speed; | |
825 | drive->current_speed = speed; | |
826 | return error; | |
827 | } | |
828 | ||
1da177e4 LT |
829 | /* |
830 | * This should get invoked any time we exit the driver to | |
831 | * wait for an interrupt response from a drive. handler() points | |
832 | * at the appropriate code to handle the next interrupt, and a | |
833 | * timer is started to prevent us from waiting forever in case | |
834 | * something goes wrong (see the ide_timer_expiry() handler later on). | |
835 | * | |
836 | * See also ide_execute_command | |
837 | */ | |
838 | static void __ide_set_handler (ide_drive_t *drive, ide_handler_t *handler, | |
839 | unsigned int timeout, ide_expiry_t *expiry) | |
840 | { | |
841 | ide_hwgroup_t *hwgroup = HWGROUP(drive); | |
842 | ||
d30a426d | 843 | BUG_ON(hwgroup->handler); |
1da177e4 LT |
844 | hwgroup->handler = handler; |
845 | hwgroup->expiry = expiry; | |
846 | hwgroup->timer.expires = jiffies + timeout; | |
d30a426d | 847 | hwgroup->req_gen_timer = hwgroup->req_gen; |
1da177e4 LT |
848 | add_timer(&hwgroup->timer); |
849 | } | |
850 | ||
851 | void ide_set_handler (ide_drive_t *drive, ide_handler_t *handler, | |
852 | unsigned int timeout, ide_expiry_t *expiry) | |
853 | { | |
854 | unsigned long flags; | |
855 | spin_lock_irqsave(&ide_lock, flags); | |
856 | __ide_set_handler(drive, handler, timeout, expiry); | |
857 | spin_unlock_irqrestore(&ide_lock, flags); | |
858 | } | |
859 | ||
860 | EXPORT_SYMBOL(ide_set_handler); | |
861 | ||
862 | /** | |
863 | * ide_execute_command - execute an IDE command | |
864 | * @drive: IDE drive to issue the command against | |
865 | * @command: command byte to write | |
866 | * @handler: handler for next phase | |
867 | * @timeout: timeout for command | |
868 | * @expiry: handler to run on timeout | |
869 | * | |
870 | * Helper function to issue an IDE command. This handles the | |
871 | * atomicity requirements, command timing and ensures that the | |
872 | * handler and IRQ setup do not race. All IDE command kick off | |
873 | * should go via this function or do equivalent locking. | |
874 | */ | |
cd2a2d96 BZ |
875 | |
876 | void ide_execute_command(ide_drive_t *drive, u8 cmd, ide_handler_t *handler, | |
877 | unsigned timeout, ide_expiry_t *expiry) | |
1da177e4 LT |
878 | { |
879 | unsigned long flags; | |
1da177e4 | 880 | ide_hwif_t *hwif = HWIF(drive); |
629f944b | 881 | |
1da177e4 | 882 | spin_lock_irqsave(&ide_lock, flags); |
629f944b | 883 | __ide_set_handler(drive, handler, timeout, expiry); |
f8c4bd0a | 884 | hwif->OUTBSYNC(hwif, cmd, hwif->io_ports.command_addr); |
629f944b BZ |
885 | /* |
886 | * Drive takes 400nS to respond, we must avoid the IRQ being | |
887 | * serviced before that. | |
888 | * | |
889 | * FIXME: we could skip this delay with care on non shared devices | |
890 | */ | |
1da177e4 LT |
891 | ndelay(400); |
892 | spin_unlock_irqrestore(&ide_lock, flags); | |
893 | } | |
1da177e4 LT |
894 | EXPORT_SYMBOL(ide_execute_command); |
895 | ||
1fc14258 BZ |
896 | void ide_execute_pkt_cmd(ide_drive_t *drive) |
897 | { | |
898 | ide_hwif_t *hwif = drive->hwif; | |
899 | unsigned long flags; | |
900 | ||
901 | spin_lock_irqsave(&ide_lock, flags); | |
f8c4bd0a | 902 | hwif->OUTBSYNC(hwif, WIN_PACKETCMD, hwif->io_ports.command_addr); |
1fc14258 BZ |
903 | ndelay(400); |
904 | spin_unlock_irqrestore(&ide_lock, flags); | |
905 | } | |
906 | EXPORT_SYMBOL_GPL(ide_execute_pkt_cmd); | |
1da177e4 | 907 | |
64a8f00f | 908 | static inline void ide_complete_drive_reset(ide_drive_t *drive, int err) |
79e36a9f EO |
909 | { |
910 | struct request *rq = drive->hwif->hwgroup->rq; | |
911 | ||
912 | if (rq && blk_special_request(rq) && rq->cmd[0] == REQ_DRIVE_RESET) | |
64a8f00f | 913 | ide_end_request(drive, err ? err : 1, 0); |
79e36a9f EO |
914 | } |
915 | ||
1da177e4 LT |
916 | /* needed below */ |
917 | static ide_startstop_t do_reset1 (ide_drive_t *, int); | |
918 | ||
919 | /* | |
920 | * atapi_reset_pollfunc() gets invoked to poll the interface for completion every 50ms | |
921 | * during an atapi drive reset operation. If the drive has not yet responded, | |
922 | * and we have not yet hit our maximum waiting time, then the timer is restarted | |
923 | * for another 50ms. | |
924 | */ | |
925 | static ide_startstop_t atapi_reset_pollfunc (ide_drive_t *drive) | |
926 | { | |
927 | ide_hwgroup_t *hwgroup = HWGROUP(drive); | |
1da177e4 LT |
928 | u8 stat; |
929 | ||
930 | SELECT_DRIVE(drive); | |
931 | udelay (10); | |
c47137a9 | 932 | stat = ide_read_status(drive); |
1da177e4 | 933 | |
c47137a9 | 934 | if (OK_STAT(stat, 0, BUSY_STAT)) |
1da177e4 | 935 | printk("%s: ATAPI reset complete\n", drive->name); |
c47137a9 | 936 | else { |
1da177e4 | 937 | if (time_before(jiffies, hwgroup->poll_timeout)) { |
1da177e4 LT |
938 | ide_set_handler(drive, &atapi_reset_pollfunc, HZ/20, NULL); |
939 | /* continue polling */ | |
940 | return ide_started; | |
941 | } | |
942 | /* end of polling */ | |
943 | hwgroup->polling = 0; | |
944 | printk("%s: ATAPI reset timed-out, status=0x%02x\n", | |
945 | drive->name, stat); | |
946 | /* do it the old fashioned way */ | |
947 | return do_reset1(drive, 1); | |
948 | } | |
949 | /* done polling */ | |
950 | hwgroup->polling = 0; | |
64a8f00f | 951 | ide_complete_drive_reset(drive, 0); |
1da177e4 LT |
952 | return ide_stopped; |
953 | } | |
954 | ||
955 | /* | |
956 | * reset_pollfunc() gets invoked to poll the interface for completion every 50ms | |
957 | * during an ide reset operation. If the drives have not yet responded, | |
958 | * and we have not yet hit our maximum waiting time, then the timer is restarted | |
959 | * for another 50ms. | |
960 | */ | |
961 | static ide_startstop_t reset_pollfunc (ide_drive_t *drive) | |
962 | { | |
963 | ide_hwgroup_t *hwgroup = HWGROUP(drive); | |
964 | ide_hwif_t *hwif = HWIF(drive); | |
ac95beed | 965 | const struct ide_port_ops *port_ops = hwif->port_ops; |
1da177e4 | 966 | u8 tmp; |
64a8f00f | 967 | int err = 0; |
1da177e4 | 968 | |
ac95beed | 969 | if (port_ops && port_ops->reset_poll) { |
64a8f00f EO |
970 | err = port_ops->reset_poll(drive); |
971 | if (err) { | |
1da177e4 LT |
972 | printk(KERN_ERR "%s: host reset_poll failure for %s.\n", |
973 | hwif->name, drive->name); | |
79e36a9f | 974 | goto out; |
1da177e4 LT |
975 | } |
976 | } | |
977 | ||
c47137a9 BZ |
978 | tmp = ide_read_status(drive); |
979 | ||
980 | if (!OK_STAT(tmp, 0, BUSY_STAT)) { | |
1da177e4 | 981 | if (time_before(jiffies, hwgroup->poll_timeout)) { |
1da177e4 LT |
982 | ide_set_handler(drive, &reset_pollfunc, HZ/20, NULL); |
983 | /* continue polling */ | |
984 | return ide_started; | |
985 | } | |
986 | printk("%s: reset timed-out, status=0x%02x\n", hwif->name, tmp); | |
987 | drive->failures++; | |
64a8f00f | 988 | err = -EIO; |
1da177e4 LT |
989 | } else { |
990 | printk("%s: reset: ", hwif->name); | |
64a57fe4 BZ |
991 | tmp = ide_read_error(drive); |
992 | ||
993 | if (tmp == 1) { | |
1da177e4 LT |
994 | printk("success\n"); |
995 | drive->failures = 0; | |
996 | } else { | |
997 | drive->failures++; | |
998 | printk("master: "); | |
999 | switch (tmp & 0x7f) { | |
1000 | case 1: printk("passed"); | |
1001 | break; | |
1002 | case 2: printk("formatter device error"); | |
1003 | break; | |
1004 | case 3: printk("sector buffer error"); | |
1005 | break; | |
1006 | case 4: printk("ECC circuitry error"); | |
1007 | break; | |
1008 | case 5: printk("controlling MPU error"); | |
1009 | break; | |
1010 | default:printk("error (0x%02x?)", tmp); | |
1011 | } | |
1012 | if (tmp & 0x80) | |
1013 | printk("; slave: failed"); | |
1014 | printk("\n"); | |
64a8f00f | 1015 | err = -EIO; |
1da177e4 LT |
1016 | } |
1017 | } | |
79e36a9f | 1018 | out: |
64a8f00f EO |
1019 | hwgroup->polling = 0; /* done polling */ |
1020 | ide_complete_drive_reset(drive, err); | |
1da177e4 LT |
1021 | return ide_stopped; |
1022 | } | |
1023 | ||
1da177e4 LT |
1024 | static void ide_disk_pre_reset(ide_drive_t *drive) |
1025 | { | |
1026 | int legacy = (drive->id->cfs_enable_2 & 0x0400) ? 0 : 1; | |
1027 | ||
1028 | drive->special.all = 0; | |
1029 | drive->special.b.set_geometry = legacy; | |
1030 | drive->special.b.recalibrate = legacy; | |
4ee06b7e | 1031 | drive->mult_count = 0; |
1da177e4 LT |
1032 | if (!drive->keep_settings && !drive->using_dma) |
1033 | drive->mult_req = 0; | |
1034 | if (drive->mult_req != drive->mult_count) | |
1035 | drive->special.b.set_multmode = 1; | |
1036 | } | |
1037 | ||
1038 | static void pre_reset(ide_drive_t *drive) | |
1039 | { | |
ac95beed BZ |
1040 | const struct ide_port_ops *port_ops = drive->hwif->port_ops; |
1041 | ||
1da177e4 LT |
1042 | if (drive->media == ide_disk) |
1043 | ide_disk_pre_reset(drive); | |
1044 | else | |
1045 | drive->post_reset = 1; | |
1046 | ||
99ffbe0e BZ |
1047 | if (drive->using_dma) { |
1048 | if (drive->crc_count) | |
578cfa0d | 1049 | ide_check_dma_crc(drive); |
99ffbe0e BZ |
1050 | else |
1051 | ide_dma_off(drive); | |
1052 | } | |
1053 | ||
1054 | if (!drive->keep_settings) { | |
1055 | if (!drive->using_dma) { | |
1da177e4 LT |
1056 | drive->unmask = 0; |
1057 | drive->io_32bit = 0; | |
1058 | } | |
1059 | return; | |
1060 | } | |
1da177e4 | 1061 | |
ac95beed BZ |
1062 | if (port_ops && port_ops->pre_reset) |
1063 | port_ops->pre_reset(drive); | |
1da177e4 | 1064 | |
513daadd SS |
1065 | if (drive->current_speed != 0xff) |
1066 | drive->desired_speed = drive->current_speed; | |
1067 | drive->current_speed = 0xff; | |
1da177e4 LT |
1068 | } |
1069 | ||
1070 | /* | |
1071 | * do_reset1() attempts to recover a confused drive by resetting it. | |
1072 | * Unfortunately, resetting a disk drive actually resets all devices on | |
1073 | * the same interface, so it can really be thought of as resetting the | |
1074 | * interface rather than resetting the drive. | |
1075 | * | |
1076 | * ATAPI devices have their own reset mechanism which allows them to be | |
1077 | * individually reset without clobbering other devices on the same interface. | |
1078 | * | |
1079 | * Unfortunately, the IDE interface does not generate an interrupt to let | |
1080 | * us know when the reset operation has finished, so we must poll for this. | |
1081 | * Equally poor, though, is the fact that this may a very long time to complete, | |
1082 | * (up to 30 seconds worstcase). So, instead of busy-waiting here for it, | |
1083 | * we set a timer to poll at 50ms intervals. | |
1084 | */ | |
1085 | static ide_startstop_t do_reset1 (ide_drive_t *drive, int do_not_try_atapi) | |
1086 | { | |
1087 | unsigned int unit; | |
1088 | unsigned long flags; | |
1089 | ide_hwif_t *hwif; | |
1090 | ide_hwgroup_t *hwgroup; | |
4c3032d8 | 1091 | struct ide_io_ports *io_ports; |
ac95beed | 1092 | const struct ide_port_ops *port_ops; |
23579a2a BZ |
1093 | u8 ctl; |
1094 | ||
1da177e4 LT |
1095 | spin_lock_irqsave(&ide_lock, flags); |
1096 | hwif = HWIF(drive); | |
1097 | hwgroup = HWGROUP(drive); | |
1098 | ||
4c3032d8 BZ |
1099 | io_ports = &hwif->io_ports; |
1100 | ||
1da177e4 | 1101 | /* We must not reset with running handlers */ |
125e1874 | 1102 | BUG_ON(hwgroup->handler != NULL); |
1da177e4 LT |
1103 | |
1104 | /* For an ATAPI device, first try an ATAPI SRST. */ | |
1105 | if (drive->media != ide_disk && !do_not_try_atapi) { | |
1106 | pre_reset(drive); | |
1107 | SELECT_DRIVE(drive); | |
1108 | udelay (20); | |
f8c4bd0a | 1109 | hwif->OUTBSYNC(hwif, WIN_SRST, io_ports->command_addr); |
68ad9910 | 1110 | ndelay(400); |
1da177e4 LT |
1111 | hwgroup->poll_timeout = jiffies + WAIT_WORSTCASE; |
1112 | hwgroup->polling = 1; | |
1113 | __ide_set_handler(drive, &atapi_reset_pollfunc, HZ/20, NULL); | |
1114 | spin_unlock_irqrestore(&ide_lock, flags); | |
1115 | return ide_started; | |
1116 | } | |
1117 | ||
1118 | /* | |
1119 | * First, reset any device state data we were maintaining | |
1120 | * for any of the drives on this interface. | |
1121 | */ | |
1122 | for (unit = 0; unit < MAX_DRIVES; ++unit) | |
1123 | pre_reset(&hwif->drives[unit]); | |
1124 | ||
4c3032d8 | 1125 | if (io_ports->ctl_addr == 0) { |
1da177e4 | 1126 | spin_unlock_irqrestore(&ide_lock, flags); |
64a8f00f | 1127 | ide_complete_drive_reset(drive, -ENXIO); |
1da177e4 LT |
1128 | return ide_stopped; |
1129 | } | |
1130 | ||
1131 | /* | |
1132 | * Note that we also set nIEN while resetting the device, | |
1133 | * to mask unwanted interrupts from the interface during the reset. | |
1134 | * However, due to the design of PC hardware, this will cause an | |
1135 | * immediate interrupt due to the edge transition it produces. | |
1136 | * This single interrupt gives us a "fast poll" for drives that | |
1137 | * recover from reset very quickly, saving us the first 50ms wait time. | |
1138 | */ | |
1139 | /* set SRST and nIEN */ | |
ff074883 | 1140 | hwif->OUTBSYNC(hwif, ATA_DEVCTL_OBS | 6, io_ports->ctl_addr); |
1da177e4 LT |
1141 | /* more than enough time */ |
1142 | udelay(10); | |
23579a2a | 1143 | if (drive->quirk_list == 2) |
ff074883 | 1144 | ctl = ATA_DEVCTL_OBS; /* clear SRST and nIEN */ |
23579a2a | 1145 | else |
ff074883 | 1146 | ctl = ATA_DEVCTL_OBS | 2; /* clear SRST, leave nIEN */ |
f8c4bd0a | 1147 | hwif->OUTBSYNC(hwif, ctl, io_ports->ctl_addr); |
1da177e4 LT |
1148 | /* more than enough time */ |
1149 | udelay(10); | |
1150 | hwgroup->poll_timeout = jiffies + WAIT_WORSTCASE; | |
1151 | hwgroup->polling = 1; | |
1152 | __ide_set_handler(drive, &reset_pollfunc, HZ/20, NULL); | |
1153 | ||
1154 | /* | |
1155 | * Some weird controller like resetting themselves to a strange | |
1156 | * state when the disks are reset this way. At least, the Winbond | |
1157 | * 553 documentation says that | |
1158 | */ | |
ac95beed BZ |
1159 | port_ops = hwif->port_ops; |
1160 | if (port_ops && port_ops->resetproc) | |
1161 | port_ops->resetproc(drive); | |
1da177e4 LT |
1162 | |
1163 | spin_unlock_irqrestore(&ide_lock, flags); | |
1164 | return ide_started; | |
1165 | } | |
1166 | ||
1167 | /* | |
1168 | * ide_do_reset() is the entry point to the drive/interface reset code. | |
1169 | */ | |
1170 | ||
1171 | ide_startstop_t ide_do_reset (ide_drive_t *drive) | |
1172 | { | |
1173 | return do_reset1(drive, 0); | |
1174 | } | |
1175 | ||
1176 | EXPORT_SYMBOL(ide_do_reset); | |
1177 | ||
1178 | /* | |
1179 | * ide_wait_not_busy() waits for the currently selected device on the hwif | |
9d501529 | 1180 | * to report a non-busy status, see comments in ide_probe_port(). |
1da177e4 LT |
1181 | */ |
1182 | int ide_wait_not_busy(ide_hwif_t *hwif, unsigned long timeout) | |
1183 | { | |
1184 | u8 stat = 0; | |
1185 | ||
1186 | while(timeout--) { | |
1187 | /* | |
1188 | * Turn this into a schedule() sleep once I'm sure | |
1189 | * about locking issues (2.5 work ?). | |
1190 | */ | |
1191 | mdelay(1); | |
4c3032d8 | 1192 | stat = hwif->INB(hwif->io_ports.status_addr); |
1da177e4 LT |
1193 | if ((stat & BUSY_STAT) == 0) |
1194 | return 0; | |
1195 | /* | |
1196 | * Assume a value of 0xff means nothing is connected to | |
1197 | * the interface and it doesn't implement the pull-down | |
1198 | * resistor on D7. | |
1199 | */ | |
1200 | if (stat == 0xff) | |
1201 | return -ENODEV; | |
6842f8c8 | 1202 | touch_softlockup_watchdog(); |
1e86240f | 1203 | touch_nmi_watchdog(); |
1da177e4 LT |
1204 | } |
1205 | return -EBUSY; | |
1206 | } | |
1207 | ||
1208 | EXPORT_SYMBOL_GPL(ide_wait_not_busy); | |
1209 |