1 /*
2 * linux/drivers/ide/ide.c Version 7.00beta2 Mar 05 2003
3 *
4 * Copyright (C) 1994-1998 Linus Torvalds & authors (see below)
5 */
6
7 /*
8 * Mostly written by Mark Lord <mlord@pobox.com>
9 * and Gadi Oxman <gadio@netvision.net.il>
10 * and Andre Hedrick <andre@linux-ide.org>
11 *
12 * See linux/MAINTAINERS for address of current maintainer.
13 *
14 * This is the multiple IDE interface driver, as evolved from hd.c.
15 * It supports up to MAX_HWIFS IDE interfaces, on one or more IRQs
16 * (usually 14 & 15).
17 * There can be up to two drives per interface, as per the ATA-2 spec.
18 *
19 * Primary: ide0, port 0x1f0; major=3; hda is minor=0; hdb is minor=64
20 * Secondary: ide1, port 0x170; major=22; hdc is minor=0; hdd is minor=64
21 * Tertiary: ide2, port 0x???; major=33; hde is minor=0; hdf is minor=64
22 * Quaternary: ide3, port 0x???; major=34; hdg is minor=0; hdh is minor=64
23 * ...
24 *
25 * From hd.c:
26 * |
27 * | It traverses the request-list, using interrupts to jump between functions.
28 * | As nearly all functions can be called within interrupts, we may not sleep.
29 * | Special care is recommended. Have Fun!
30 * |
31 * | modified by Drew Eckhardt to check nr of hd's from the CMOS.
32 * |
33 * | Thanks to Branko Lankester, lankeste@fwi.uva.nl, who found a bug
34 * | in the early extended-partition checks and added DM partitions.
35 * |
36 * | Early work on error handling by Mika Liljeberg (liljeber@cs.Helsinki.FI).
37 * |
38 * | IRQ-unmask, drive-id, multiple-mode, support for ">16 heads",
39 * | and general streamlining by Mark Lord (mlord@pobox.com).
40 *
41 * October, 1994 -- Complete line-by-line overhaul for linux 1.1.x, by:
42 *
43 * Mark Lord (mlord@pobox.com) (IDE Perf.Pkg)
44 * Delman Lee (delman@ieee.org) ("Mr. atdisk2")
45 * Scott Snyder (snyder@fnald0.fnal.gov) (ATAPI IDE cd-rom)
46 *
47 * This was a rewrite of just about everything from hd.c, though some original
48 * code is still sprinkled about. Think of it as a major evolution, with
49 * inspiration from lots of linux users, esp. hamish@zot.apana.org.au
50 *
51 * Version 1.0 ALPHA initial code, primary i/f working okay
52 * Version 1.3 BETA dual i/f on shared irq tested & working!
53 * Version 1.4 BETA added auto probing for irq(s)
54 * Version 1.5 BETA added ALPHA (untested) support for IDE cd-roms,
55 * ...
56 * Version 5.50 allow values as small as 20 for idebus=
57 * Version 5.51 force non io_32bit in drive_cmd_intr()
58 * change delay_10ms() to delay_50ms() to fix problems
59 * Version 5.52 fix incorrect invalidation of removable devices
60 * add "hdx=slow" command line option
61 * Version 5.60 start to modularize the driver; the disk and ATAPI
62 * drivers can be compiled as loadable modules.
63 * move IDE probe code to ide-probe.c
64 * move IDE disk code to ide-disk.c
65 * add support for generic IDE device subdrivers
66 * add m68k code from Geert Uytterhoeven
67 * probe all interfaces by default
68 * add ioctl to (re)probe an interface
69 * Version 6.00 use per device request queues
70 * attempt to optimize shared hwgroup performance
71 * add ioctl to manually adjust bandwidth algorithms
72 * add kerneld support for the probe module
73 * fix bug in ide_error()
74 * fix bug in the first ide_get_lock() call for Atari
75 * don't flush leftover data for ATAPI devices
76 * Version 6.01 clear hwgroup->active while the hwgroup sleeps
77 * support HDIO_GETGEO for floppies
78 * Version 6.02 fix ide_ack_intr() call
79 * check partition table on floppies
80 * Version 6.03 handle bad status bit sequencing in ide_wait_stat()
81 * Version 6.10 deleted old entries from this list of updates
82 * replaced triton.c with ide-dma.c generic PCI DMA
83 * added support for BIOS-enabled UltraDMA
84 * rename all "promise" things to "pdc4030"
85 * fix EZ-DRIVE handling on small disks
86 * Version 6.11 fix probe error in ide_scan_devices()
87 * fix ancient "jiffies" polling bugs
88 * mask all hwgroup interrupts on each irq entry
89 * Version 6.12 integrate ioctl and proc interfaces
90 * fix parsing of "idex=" command line parameter
91 * Version 6.13 add support for ide4/ide5 courtesy rjones@orchestream.com
92 * Version 6.14 fixed IRQ sharing among PCI devices
93 * Version 6.15 added SMP awareness to IDE drivers
94 * Version 6.16 fixed various bugs; even more SMP friendly
95 * Version 6.17 fix for newest EZ-Drive problem
96 * Version 6.18 default unpartitioned-disk translation now "BIOS LBA"
97 * Version 6.19 Re-design for a UNIFORM driver for all platforms,
98 * model based on suggestions from Russell King and
99 * Geert Uytterhoeven
100 * Promise DC4030VL now supported.
101 * add support for ide6/ide7
102 * delay_50ms() changed to ide_delay_50ms() and exported.
103 * Version 6.20 Added/Fixed Generic ATA-66 support and hwif detection.
104 * Added hdx=flash to allow for second flash disk
105 * detection w/o the hang loop.
106 * Added support for ide8/ide9
107 * Added idex=ata66 for the quirky chipsets that are
108 * ATA-66 compliant, but have yet to determine a method
109 * of verification of the 80c cable presence.
110 * Specifically Promise's PDC20262 chipset.
111 * Version 6.21 Fixing/Fixed SMP spinlock issue with insight from an old
112 * hat that clarified original low level driver design.
113 * Version 6.30 Added SMP support; fixed multmode issues. -ml
114 * Version 6.31 Debug Share INTR's and request queue streaming
115 * Native ATA-100 support
116 * Prep for Cascades Project
117 * Version 7.00alpha First named revision of ide rearrange
118 *
119 * Some additional driver compile-time options are in ./include/linux/ide.h
120 *
121 * To do, in likely order of completion:
122 * - modify kernel to obtain BIOS geometry for drives on 2nd/3rd/4th i/f
123 *
124 */
125
126 #define REVISION "Revision: 7.00alpha2"
127 #define VERSION "Id: ide.c 7.00a2 20020906"
128
129 #undef REALLY_SLOW_IO /* most systems can safely undef this */
130
131 #define _IDE_C /* Tell ide.h it's really us */
132
133 #include <linux/config.h>
134 #include <linux/module.h>
135 #include <linux/types.h>
136 #include <linux/string.h>
137 #include <linux/kernel.h>
138 #include <linux/timer.h>
139 #include <linux/mm.h>
140 #include <linux/interrupt.h>
141 #include <linux/major.h>
142 #include <linux/errno.h>
143 #include <linux/genhd.h>
144 #include <linux/blkpg.h>
145 #include <linux/slab.h>
146 #include <linux/init.h>
147 #include <linux/pci.h>
148 #include <linux/delay.h>
149 #include <linux/ide.h>
150 #include <linux/devfs_fs_kernel.h>
151 #include <linux/completion.h>
152 #include <linux/reboot.h>
153 #include <linux/cdrom.h>
154 #include <linux/seq_file.h>
155 #include <linux/device.h>
156 #include <linux/bitops.h>
157
158 #include <asm/byteorder.h>
159 #include <asm/irq.h>
160 #include <asm/uaccess.h>
161 #include <asm/io.h>
162
163
164 /* default maximum number of failures */
165 #define IDE_DEFAULT_MAX_FAILURES 1
166
167 static const u8 ide_hwif_to_major[] = { IDE0_MAJOR, IDE1_MAJOR,
168 IDE2_MAJOR, IDE3_MAJOR,
169 IDE4_MAJOR, IDE5_MAJOR,
170 IDE6_MAJOR, IDE7_MAJOR,
171 IDE8_MAJOR, IDE9_MAJOR };
172
173 static int idebus_parameter; /* holds the "idebus=" parameter */
174 static int system_bus_speed; /* holds what we think is VESA/PCI bus speed */
175 static int initializing; /* set while initializing built-in drivers */
176
177 DECLARE_MUTEX(ide_cfg_sem);
178 __cacheline_aligned_in_smp DEFINE_SPINLOCK(ide_lock);
179
180 #ifdef CONFIG_BLK_DEV_IDEPCI
181 static int ide_scan_direction; /* THIS was formerly 2.2.x pci=reverse */
182 #endif
183
184 #ifdef CONFIG_IDEDMA_AUTO
185 int noautodma = 0;
186 #else
187 int noautodma = 1;
188 #endif
189
190 EXPORT_SYMBOL(noautodma);
191
192 /*
193 * This is declared extern in ide.h, for access by other IDE modules:
194 */
195 ide_hwif_t ide_hwifs[MAX_HWIFS]; /* master data repository */
196
197 EXPORT_SYMBOL(ide_hwifs);
198
199 extern ide_driver_t idedefault_driver;
200 static void setup_driver_defaults(ide_driver_t *driver);
201
202 /*
203 * Do not even *think* about calling this!
204 */
205 static void init_hwif_data(ide_hwif_t *hwif, unsigned int index)
206 {
207 unsigned int unit;
208
209 /* bulk initialize hwif & drive info with zeros */
210 memset(hwif, 0, sizeof(ide_hwif_t));
211
212 /* fill in any non-zero initial values */
213 hwif->index = index;
214 hwif->major = ide_hwif_to_major[index];
215
216 hwif->name[0] = 'i';
217 hwif->name[1] = 'd';
218 hwif->name[2] = 'e';
219 hwif->name[3] = '' + index;
220
221 hwif->bus_state = BUSSTATE_ON;
222
223 hwif->atapi_dma = 0; /* disable all atapi dma */
224 hwif->ultra_mask = 0x80; /* disable all ultra */
225 hwif->mwdma_mask = 0x80; /* disable all mwdma */
226 hwif->swdma_mask = 0x80; /* disable all swdma */
227
228 sema_init(&hwif->gendev_rel_sem, 0);
229
230 default_hwif_iops(hwif);
231 default_hwif_transport(hwif);
232 for (unit = 0; unit < MAX_DRIVES; ++unit) {
233 ide_drive_t *drive = &hwif->drives[unit];
234
235 drive->media = ide_disk;
236 drive->select.all = (unit<<4)|0xa0;
237 drive->hwif = hwif;
238 drive->ctl = 0x08;
239 drive->ready_stat = READY_STAT;
240 drive->bad_wstat = BAD_W_STAT;
241 drive->special.b.recalibrate = 1;
242 drive->special.b.set_geometry = 1;
243 drive->name[0] = 'h';
244 drive->name[1] = 'd';
245 drive->name[2] = 'a' + (index * MAX_DRIVES) + unit;
246 drive->max_failures = IDE_DEFAULT_MAX_FAILURES;
247 drive->using_dma = 0;
248 drive->is_flash = 0;
249 drive->driver = &idedefault_driver;
250 drive->vdma = 0;
251 INIT_LIST_HEAD(&drive->list);
252 sema_init(&drive->gendev_rel_sem, 0);
253 }
254 }
255
256 static void init_hwif_default(ide_hwif_t *hwif, unsigned int index)
257 {
258 hw_regs_t hw;
259
260 memset(&hw, 0, sizeof(hw_regs_t));
261
262 ide_init_hwif_ports(&hw, ide_default_io_base(index), 0, &hwif->irq);
263
264 memcpy(&hwif->hw, &hw, sizeof(hw));
265 memcpy(hwif->io_ports, hw.io_ports, sizeof(hw.io_ports));
266
267 hwif->noprobe = !hwif->io_ports[IDE_DATA_OFFSET];
268 #ifdef CONFIG_BLK_DEV_HD
269 if (hwif->io_ports[IDE_DATA_OFFSET] == HD_DATA)
270 hwif->noprobe = 1; /* may be overridden by ide_setup() */
271 #endif
272 }
273
274 extern void ide_arm_init(void);
275
276 /*
277 * init_ide_data() sets reasonable default values into all fields
278 * of all instances of the hwifs and drives, but only on the first call.
279 * Subsequent calls have no effect (they don't wipe out anything).
280 *
281 * This routine is normally called at driver initialization time,
282 * but may also be called MUCH earlier during kernel "command-line"
283 * parameter processing. As such, we cannot depend on any other parts
284 * of the kernel (such as memory allocation) to be functioning yet.
285 *
286 * This is too bad, as otherwise we could dynamically allocate the
287 * ide_drive_t structs as needed, rather than always consuming memory
288 * for the max possible number (MAX_HWIFS * MAX_DRIVES) of them.
289 *
290 * FIXME: We should stuff the setup data into __init and copy the
291 * relevant hwifs/allocate them properly during boot.
292 */
293 #define MAGIC_COOKIE 0x12345678
294 static void __init init_ide_data (void)
295 {
296 ide_hwif_t *hwif;
297 unsigned int index;
298 static unsigned long magic_cookie = MAGIC_COOKIE;
299
300 if (magic_cookie != MAGIC_COOKIE)
301 return; /* already initialized */
302 magic_cookie = 0;
303
304 setup_driver_defaults(&idedefault_driver);
305
306 /* Initialise all interface structures */
307 for (index = 0; index < MAX_HWIFS; ++index) {
308 hwif = &ide_hwifs[index];
309 init_hwif_data(hwif, index);
310 init_hwif_default(hwif, index);
311 #if !defined(CONFIG_PPC32) || !defined(CONFIG_PCI)
312 hwif->irq = hwif->hw.irq =
313 ide_init_default_irq(hwif->io_ports[IDE_DATA_OFFSET]);
314 #endif
315 }
316 #ifdef CONFIG_IDE_ARM
317 initializing = 1;
318 ide_arm_init();
319 initializing = 0;
320 #endif
321 }
322
323 /**
324 * ide_system_bus_speed - guess bus speed
325 *
326 * ide_system_bus_speed() returns what we think is the system VESA/PCI
327 * bus speed (in MHz). This is used for calculating interface PIO timings.
328 * The default is 40 for known PCI systems, 50 otherwise.
329 * The "idebus=xx" parameter can be used to override this value.
330 * The actual value to be used is computed/displayed the first time
331 * through. Drivers should only use this as a last resort.
332 *
333 * Returns a guessed speed in MHz.
334 */
335
336 static int ide_system_bus_speed(void)
337 {
338 #ifdef CONFIG_PCI
339 static struct pci_device_id pci_default[] = {
340 { PCI_DEVICE(PCI_ANY_ID, PCI_ANY_ID) },
341 { }
342 };
343 #else
344 #define pci_default 0
345 #endif /* CONFIG_PCI */
346
347 if (!system_bus_speed) {
348 if (idebus_parameter) {
349 /* user supplied value */
350 system_bus_speed = idebus_parameter;
351 } else if (pci_dev_present(pci_default)) {
352 /* safe default value for PCI */
353 system_bus_speed = 33;
354 } else {
355 /* safe default value for VESA and PCI */
356 system_bus_speed = 50;
357 }
358 printk(KERN_INFO "ide: Assuming %dMHz system bus speed "
359 "for PIO modes%s\n", system_bus_speed,
360 idebus_parameter ? "" : "; override with idebus=xx");
361 }
362 return system_bus_speed;
363 }
364
365 static int ide_open (struct inode * inode, struct file * filp)
366 {
367 return -ENXIO;
368 }
369
370 /*
371 * drives_lock protects the list of drives, drivers_lock the
372 * list of drivers. Currently nobody takes both at once.
373 */
374
375 static DEFINE_SPINLOCK(drives_lock);
376 static DEFINE_SPINLOCK(drivers_lock);
377 static LIST_HEAD(drivers);
378
379 /* Iterator for the driver list. */
380
381 static void *m_start(struct seq_file *m, loff_t *pos)
382 {
383 struct list_head *p;
384 loff_t l = *pos;
385 spin_lock(&drivers_lock);
386 list_for_each(p, &drivers)
387 if (!l--)
388 return list_entry(p, ide_driver_t, drivers);
389 return NULL;
390 }
391
392 static void *m_next(struct seq_file *m, void *v, loff_t *pos)
393 {
394 struct list_head *p = ((ide_driver_t *)v)->drivers.next;
395 (*pos)++;
396 return p==&drivers ? NULL : list_entry(p, ide_driver_t, drivers);
397 }
398
399 static void m_stop(struct seq_file *m, void *v)
400 {
401 spin_unlock(&drivers_lock);
402 }
403
404 static int show_driver(struct seq_file *m, void *v)
405 {
406 ide_driver_t *driver = v;
407 seq_printf(m, "%s version %s\n", driver->name, driver->version);
408 return 0;
409 }
410
411 struct seq_operations ide_drivers_op = {
412 .start = m_start,
413 .next = m_next,
414 .stop = m_stop,
415 .show = show_driver
416 };
417
418 #ifdef CONFIG_PROC_FS
419 struct proc_dir_entry *proc_ide_root;
420
421 static ide_proc_entry_t generic_subdriver_entries[] = {
422 { "capacity", S_IFREG|S_IRUGO, proc_ide_read_capacity, NULL },
423 { NULL, 0, NULL, NULL }
424 };
425 #endif
426
427 static struct resource* hwif_request_region(ide_hwif_t *hwif,
428 unsigned long addr, int num)
429 {
430 struct resource *res = request_region(addr, num, hwif->name);
431
432 if (!res)
433 printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n",
434 hwif->name, addr, addr+num-1);
435 return res;
436 }
437
438 /**
439 * ide_hwif_request_regions - request resources for IDE
440 * @hwif: interface to use
441 *
442 * Requests all the needed resources for an interface.
443 * Right now core IDE code does this work which is deeply wrong.
444 * MMIO leaves it to the controller driver,
445 * PIO will migrate this way over time.
446 */
447
448 int ide_hwif_request_regions(ide_hwif_t *hwif)
449 {
450 unsigned long addr;
451 unsigned int i;
452
453 if (hwif->mmio == 2)
454 return 0;
455 BUG_ON(hwif->mmio == 1);
456 addr = hwif->io_ports[IDE_CONTROL_OFFSET];
457 if (addr && !hwif_request_region(hwif, addr, 1))
458 goto control_region_busy;
459 hwif->straight8 = 0;
460 addr = hwif->io_ports[IDE_DATA_OFFSET];
461 if ((addr | 7) == hwif->io_ports[IDE_STATUS_OFFSET]) {
462 if (!hwif_request_region(hwif, addr, 8))
463 goto data_region_busy;
464 hwif->straight8 = 1;
465 return 0;
466 }
467 for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) {
468 addr = hwif->io_ports[i];
469 if (!hwif_request_region(hwif, addr, 1)) {
470 while (--i)
471 release_region(addr, 1);
472 goto data_region_busy;
473 }
474 }
475 return 0;
476
477 data_region_busy:
478 addr = hwif->io_ports[IDE_CONTROL_OFFSET];
479 if (addr)
480 release_region(addr, 1);
481 control_region_busy:
482 /* If any errors are return, we drop the hwif interface. */
483 return -EBUSY;
484 }
485
486 /**
487 * ide_hwif_release_regions - free IDE resources
488 *
489 * Note that we only release the standard ports,
490 * and do not even try to handle any extra ports
491 * allocated for weird IDE interface chipsets.
492 *
493 * Note also that we don't yet handle mmio resources here. More
494 * importantly our caller should be doing this so we need to
495 * restructure this as a helper function for drivers.
496 */
497
498 void ide_hwif_release_regions(ide_hwif_t *hwif)
499 {
500 u32 i = 0;
501
502 if (hwif->mmio == 2)
503 return;
504 if (hwif->io_ports[IDE_CONTROL_OFFSET])
505 release_region(hwif->io_ports[IDE_CONTROL_OFFSET], 1);
506 if (hwif->straight8) {
507 release_region(hwif->io_ports[IDE_DATA_OFFSET], 8);
508 return;
509 }
510 for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++)
511 if (hwif->io_ports[i])
512 release_region(hwif->io_ports[i], 1);
513 }
514
515 /**
516 * ide_hwif_restore - restore hwif to template
517 * @hwif: hwif to update
518 * @tmp_hwif: template
519 *
520 * Restore hwif to a previous state by copying most settngs
521 * from the template.
522 */
523
524 static void ide_hwif_restore(ide_hwif_t *hwif, ide_hwif_t *tmp_hwif)
525 {
526 hwif->hwgroup = tmp_hwif->hwgroup;
527
528 hwif->gendev.parent = tmp_hwif->gendev.parent;
529
530 hwif->proc = tmp_hwif->proc;
531
532 hwif->major = tmp_hwif->major;
533 hwif->straight8 = tmp_hwif->straight8;
534 hwif->bus_state = tmp_hwif->bus_state;
535
536 hwif->atapi_dma = tmp_hwif->atapi_dma;
537 hwif->ultra_mask = tmp_hwif->ultra_mask;
538 hwif->mwdma_mask = tmp_hwif->mwdma_mask;
539 hwif->swdma_mask = tmp_hwif->swdma_mask;
540
541 hwif->chipset = tmp_hwif->chipset;
542 hwif->hold = tmp_hwif->hold;
543
544 #ifdef CONFIG_BLK_DEV_IDEPCI
545 hwif->pci_dev = tmp_hwif->pci_dev;
546 hwif->cds = tmp_hwif->cds;
547 #endif
548
549 hwif->tuneproc = tmp_hwif->tuneproc;
550 hwif->speedproc = tmp_hwif->speedproc;
551 hwif->selectproc = tmp_hwif->selectproc;
552 hwif->reset_poll = tmp_hwif->reset_poll;
553 hwif->pre_reset = tmp_hwif->pre_reset;
554 hwif->resetproc = tmp_hwif->resetproc;
555 hwif->intrproc = tmp_hwif->intrproc;
556 hwif->maskproc = tmp_hwif->maskproc;
557 hwif->quirkproc = tmp_hwif->quirkproc;
558 hwif->busproc = tmp_hwif->busproc;
559
560 hwif->ata_input_data = tmp_hwif->ata_input_data;
561 hwif->ata_output_data = tmp_hwif->ata_output_data;
562 hwif->atapi_input_bytes = tmp_hwif->atapi_input_bytes;
563 hwif->atapi_output_bytes = tmp_hwif->atapi_output_bytes;
564
565 hwif->dma_setup = tmp_hwif->dma_setup;
566 hwif->dma_exec_cmd = tmp_hwif->dma_exec_cmd;
567 hwif->dma_start = tmp_hwif->dma_start;
568 hwif->ide_dma_end = tmp_hwif->ide_dma_end;
569 hwif->ide_dma_check = tmp_hwif->ide_dma_check;
570 hwif->ide_dma_on = tmp_hwif->ide_dma_on;
571 hwif->ide_dma_off_quietly = tmp_hwif->ide_dma_off_quietly;
572 hwif->ide_dma_test_irq = tmp_hwif->ide_dma_test_irq;
573 hwif->ide_dma_host_on = tmp_hwif->ide_dma_host_on;
574 hwif->ide_dma_host_off = tmp_hwif->ide_dma_host_off;
575 hwif->ide_dma_lostirq = tmp_hwif->ide_dma_lostirq;
576 hwif->ide_dma_timeout = tmp_hwif->ide_dma_timeout;
577
578 hwif->OUTB = tmp_hwif->OUTB;
579 hwif->OUTBSYNC = tmp_hwif->OUTBSYNC;
580 hwif->OUTW = tmp_hwif->OUTW;
581 hwif->OUTL = tmp_hwif->OUTL;
582 hwif->OUTSW = tmp_hwif->OUTSW;
583 hwif->OUTSL = tmp_hwif->OUTSL;
584
585 hwif->INB = tmp_hwif->INB;
586 hwif->INW = tmp_hwif->INW;
587 hwif->INL = tmp_hwif->INL;
588 hwif->INSW = tmp_hwif->INSW;
589 hwif->INSL = tmp_hwif->INSL;
590
591 hwif->sg_max_nents = tmp_hwif->sg_max_nents;
592
593 hwif->mmio = tmp_hwif->mmio;
594 hwif->rqsize = tmp_hwif->rqsize;
595 hwif->no_lba48 = tmp_hwif->no_lba48;
596
597 #ifndef CONFIG_BLK_DEV_IDECS
598 hwif->irq = tmp_hwif->irq;
599 #endif
600
601 hwif->dma_base = tmp_hwif->dma_base;
602 hwif->dma_master = tmp_hwif->dma_master;
603 hwif->dma_command = tmp_hwif->dma_command;
604 hwif->dma_vendor1 = tmp_hwif->dma_vendor1;
605 hwif->dma_status = tmp_hwif->dma_status;
606 hwif->dma_vendor3 = tmp_hwif->dma_vendor3;
607 hwif->dma_prdtable = tmp_hwif->dma_prdtable;
608
609 hwif->dma_extra = tmp_hwif->dma_extra;
610 hwif->config_data = tmp_hwif->config_data;
611 hwif->select_data = tmp_hwif->select_data;
612 hwif->autodma = tmp_hwif->autodma;
613 hwif->udma_four = tmp_hwif->udma_four;
614 hwif->no_dsc = tmp_hwif->no_dsc;
615
616 hwif->hwif_data = tmp_hwif->hwif_data;
617 }
618
619 /**
620 * ide_unregister - free an ide interface
621 * @index: index of interface (will change soon to a pointer)
622 *
623 * Perform the final unregister of an IDE interface. At the moment
624 * we don't refcount interfaces so this will also get split up.
625 *
626 * Locking:
627 * The caller must not hold the IDE locks
628 * The drive present/vanishing is not yet properly locked
629 * Take care with the callbacks. These have been split to avoid
630 * deadlocking the IDE layer. The shutdown callback is called
631 * before we take the lock and free resources. It is up to the
632 * caller to be sure there is no pending I/O here, and that
633 * the interfce will not be reopened (present/vanishing locking
634 * isnt yet done btw). After we commit to the final kill we
635 * call the cleanup callback with the ide locks held.
636 *
637 * Unregister restores the hwif structures to the default state.
638 * This is raving bonkers.
639 */
640
641 void ide_unregister(unsigned int index)
642 {
643 ide_drive_t *drive;
644 ide_hwif_t *hwif, *g;
645 static ide_hwif_t tmp_hwif; /* protected by ide_cfg_sem */
646 ide_hwgroup_t *hwgroup;
647 int irq_count = 0, unit, i;
648
649 BUG_ON(index >= MAX_HWIFS);
650
651 BUG_ON(in_interrupt());
652 BUG_ON(irqs_disabled());
653 down(&ide_cfg_sem);
654 spin_lock_irq(&ide_lock);
655 hwif = &ide_hwifs[index];
656 if (!hwif->present)
657 goto abort;
658 for (unit = 0; unit < MAX_DRIVES; ++unit) {
659 drive = &hwif->drives[unit];
660 if (!drive->present)
661 continue;
662 if (drive->usage || DRIVER(drive)->busy)
663 goto abort;
664 drive->dead = 1;
665 }
666 hwif->present = 0;
667
668 spin_unlock_irq(&ide_lock);
669
670 for (unit = 0; unit < MAX_DRIVES; ++unit) {
671 drive = &hwif->drives[unit];
672 if (!drive->present)
673 continue;
674 DRIVER(drive)->cleanup(drive);
675 }
676
677 destroy_proc_ide_interface(hwif);
678
679 hwgroup = hwif->hwgroup;
680 /*
681 * free the irq if we were the only hwif using it
682 */
683 g = hwgroup->hwif;
684 do {
685 if (g->irq == hwif->irq)
686 ++irq_count;
687 g = g->next;
688 } while (g != hwgroup->hwif);
689 if (irq_count == 1)
690 free_irq(hwif->irq, hwgroup);
691
692 spin_lock_irq(&ide_lock);
693 /*
694 * Note that we only release the standard ports,
695 * and do not even try to handle any extra ports
696 * allocated for weird IDE interface chipsets.
697 */
698 ide_hwif_release_regions(hwif);
699
700 /*
701 * Remove us from the hwgroup, and free
702 * the hwgroup if we were the only member
703 */
704 for (i = 0; i < MAX_DRIVES; ++i) {
705 drive = &hwif->drives[i];
706 if (drive->devfs_name[0] != '\0') {
707 devfs_remove(drive->devfs_name);
708 drive->devfs_name[0] = '\0';
709 }
710 if (!drive->present)
711 continue;
712 if (drive == drive->next) {
713 /* special case: last drive from hwgroup. */
714 BUG_ON(hwgroup->drive != drive);
715 hwgroup->drive = NULL;
716 } else {
717 ide_drive_t *walk;
718
719 walk = hwgroup->drive;
720 while (walk->next != drive)
721 walk = walk->next;
722 walk->next = drive->next;
723 if (hwgroup->drive == drive) {
724 hwgroup->drive = drive->next;
725 hwgroup->hwif = HWIF(hwgroup->drive);
726 }
727 }
728 BUG_ON(hwgroup->drive == drive);
729 if (drive->id != NULL) {
730 kfree(drive->id);
731 drive->id = NULL;
732 }
733 drive->present = 0;
734 /* Messed up locking ... */
735 spin_unlock_irq(&ide_lock);
736 blk_cleanup_queue(drive->queue);
737 device_unregister(&drive->gendev);
738 down(&drive->gendev_rel_sem);
739 spin_lock_irq(&ide_lock);
740 drive->queue = NULL;
741 }
742 if (hwif->next == hwif) {
743 BUG_ON(hwgroup->hwif != hwif);
744 kfree(hwgroup);
745 } else {
746 /* There is another interface in hwgroup.
747 * Unlink us, and set hwgroup->drive and ->hwif to
748 * something sane.
749 */
750 g = hwgroup->hwif;
751 while (g->next != hwif)
752 g = g->next;
753 g->next = hwif->next;
754 if (hwgroup->hwif == hwif) {
755 /* Chose a random hwif for hwgroup->hwif.
756 * It's guaranteed that there are no drives
757 * left in the hwgroup.
758 */
759 BUG_ON(hwgroup->drive != NULL);
760 hwgroup->hwif = g;
761 }
762 BUG_ON(hwgroup->hwif == hwif);
763 }
764
765 /* More messed up locking ... */
766 spin_unlock_irq(&ide_lock);
767 device_unregister(&hwif->gendev);
768 down(&hwif->gendev_rel_sem);
769
770 /*
771 * Remove us from the kernel's knowledge
772 */
773 blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS);
774 for (i = 0; i < MAX_DRIVES; i++) {
775 struct gendisk *disk = hwif->drives[i].disk;
776 hwif->drives[i].disk = NULL;
777 put_disk(disk);
778 }
779 kfree(hwif->sg_table);
780 unregister_blkdev(hwif->major, hwif->name);
781 spin_lock_irq(&ide_lock);
782
783 if (hwif->dma_base) {
784 (void) ide_release_dma(hwif);
785
786 hwif->dma_base = 0;
787 hwif->dma_master = 0;
788 hwif->dma_command = 0;
789 hwif->dma_vendor1 = 0;
790 hwif->dma_status = 0;
791 hwif->dma_vendor3 = 0;
792 hwif->dma_prdtable = 0;
793 }
794
795 /* copy original settings */
796 tmp_hwif = *hwif;
797
798 /* restore hwif data to pristine status */
799 init_hwif_data(hwif, index);
800 init_hwif_default(hwif, index);
801
802 ide_hwif_restore(hwif, &tmp_hwif);
803
804 abort:
805 spin_unlock_irq(&ide_lock);
806 up(&ide_cfg_sem);
807 }
808
809 EXPORT_SYMBOL(ide_unregister);
810
811
812 /**
813 * ide_setup_ports - set up IDE interface ports
814 * @hw: register descriptions
815 * @base: base register
816 * @offsets: table of register offsets
817 * @ctrl: control register
818 * @ack_irq: IRQ ack
819 * @irq: interrupt lie
820 *
821 * Setup hw_regs_t structure described by parameters. You
822 * may set up the hw structure yourself OR use this routine to
823 * do it for you. This is basically a helper
824 *
825 */
826
827 void ide_setup_ports ( hw_regs_t *hw,
828 unsigned long base, int *offsets,
829 unsigned long ctrl, unsigned long intr,
830 ide_ack_intr_t *ack_intr,
831 /*
832 * ide_io_ops_t *iops,
833 */
834 int irq)
835 {
836 int i;
837
838 for (i = 0; i < IDE_NR_PORTS; i++) {
839 if (offsets[i] == -1) {
840 switch(i) {
841 case IDE_CONTROL_OFFSET:
842 hw->io_ports[i] = ctrl;
843 break;
844 #if defined(CONFIG_AMIGA) || defined(CONFIG_MAC)
845 case IDE_IRQ_OFFSET:
846 hw->io_ports[i] = intr;
847 break;
848 #endif /* (CONFIG_AMIGA) || (CONFIG_MAC) */
849 default:
850 hw->io_ports[i] = 0;
851 break;
852 }
853 } else {
854 hw->io_ports[i] = base + offsets[i];
855 }
856 }
857 hw->irq = irq;
858 hw->dma = NO_DMA;
859 hw->ack_intr = ack_intr;
860 /*
861 * hw->iops = iops;
862 */
863 }
864
865 /**
866 * ide_register_hw_with_fixup - register IDE interface
867 * @hw: hardware registers
868 * @hwifp: pointer to returned hwif
869 * @fixup: fixup function
870 *
871 * Register an IDE interface, specifying exactly the registers etc.
872 * Set init=1 iff calling before probes have taken place.
873 *
874 * Returns -1 on error.
875 */
876
877 int ide_register_hw_with_fixup(hw_regs_t *hw, ide_hwif_t **hwifp, void(*fixup)(ide_hwif_t *hwif))
878 {
879 int index, retry = 1;
880 ide_hwif_t *hwif;
881
882 do {
883 for (index = 0; index < MAX_HWIFS; ++index) {
884 hwif = &ide_hwifs[index];
885 if (hwif->hw.io_ports[IDE_DATA_OFFSET] == hw->io_ports[IDE_DATA_OFFSET])
886 goto found;
887 }
888 for (index = 0; index < MAX_HWIFS; ++index) {
889 hwif = &ide_hwifs[index];
890 if (hwif->hold)
891 continue;
892 if ((!hwif->present && !hwif->mate && !initializing) ||
893 (!hwif->hw.io_ports[IDE_DATA_OFFSET] && initializing))
894 goto found;
895 }
896 for (index = 0; index < MAX_HWIFS; index++)
897 ide_unregister(index);
898 } while (retry--);
899 return -1;
900 found:
901 if (hwif->present)
902 ide_unregister(index);
903 else if (!hwif->hold) {
904 init_hwif_data(hwif, index);
905 init_hwif_default(hwif, index);
906 }
907 if (hwif->present)
908 return -1;
909 memcpy(&hwif->hw, hw, sizeof(*hw));
910 memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->hw.io_ports));
911 hwif->irq = hw->irq;
912 hwif->noprobe = 0;
913 hwif->chipset = hw->chipset;
914
915 if (!initializing) {
916 probe_hwif_init_with_fixup(hwif, fixup);
917 create_proc_ide_interfaces();
918 }
919
920 if (hwifp)
921 *hwifp = hwif;
922
923 return (initializing || hwif->present) ? index : -1;
924 }
925
926 EXPORT_SYMBOL(ide_register_hw_with_fixup);
927
928 int ide_register_hw(hw_regs_t *hw, ide_hwif_t **hwifp)
929 {
930 return ide_register_hw_with_fixup(hw, hwifp, NULL);
931 }
932
933 EXPORT_SYMBOL(ide_register_hw);
934
935 /*
936 * Locks for IDE setting functionality
937 */
938
939 DECLARE_MUTEX(ide_setting_sem);
940
941 /**
942 * ide_add_setting - add an ide setting option
943 * @drive: drive to use
944 * @name: setting name
945 * @rw: true if the function is read write
946 * @read_ioctl: function to call on read
947 * @write_ioctl: function to call on write
948 * @data_type: type of data
949 * @min: range minimum
950 * @max: range maximum
951 * @mul_factor: multiplication scale
952 * @div_factor: divison scale
953 * @data: private data field
954 * @set: setting
955 *
956 * Removes the setting named from the device if it is present.
957 * The function takes the settings_lock to protect against
958 * parallel changes. This function must not be called from IRQ
959 * context. Returns 0 on success or -1 on failure.
960 *
961 * BUGS: This code is seriously over-engineered. There is also
962 * magic about how the driver specific features are setup. If
963 * a driver is attached we assume the driver settings are auto
964 * remove.
965 */
966
967 int ide_add_setting (ide_drive_t *drive, const char *name, int rw, int read_ioctl, int write_ioctl, int data_type, int min, int max, int mul_factor, int div_factor, void *data, ide_procset_t *set)
968 {
969 ide_settings_t **p = (ide_settings_t **) &drive->settings, *setting = NULL;
970
971 down(&ide_setting_sem);
972 while ((*p) && strcmp((*p)->name, name) < 0)
973 p = &((*p)->next);
974 if ((setting = kmalloc(sizeof(*setting), GFP_KERNEL)) == NULL)
975 goto abort;
976 memset(setting, 0, sizeof(*setting));
977 if ((setting->name = kmalloc(strlen(name) + 1, GFP_KERNEL)) == NULL)
978 goto abort;
979 strcpy(setting->name, name);
980 setting->rw = rw;
981 setting->read_ioctl = read_ioctl;
982 setting->write_ioctl = write_ioctl;
983 setting->data_type = data_type;
984 setting->min = min;
985 setting->max = max;
986 setting->mul_factor = mul_factor;
987 setting->div_factor = div_factor;
988 setting->data = data;
989 setting->set = set;
990
991 setting->next = *p;
992 if (drive->driver != &idedefault_driver)
993 setting->auto_remove = 1;
994 *p = setting;
995 up(&ide_setting_sem);
996 return 0;
997 abort:
998 up(&ide_setting_sem);
999 if (setting)
1000 kfree(setting);
1001 return -1;
1002 }
1003
1004 EXPORT_SYMBOL(ide_add_setting);
1005
1006 /**
1007 * __ide_remove_setting - remove an ide setting option
1008 * @drive: drive to use
1009 * @name: setting name
1010 *
1011 * Removes the setting named from the device if it is present.
1012 * The caller must hold the setting semaphore.
1013 */
1014
1015 static void __ide_remove_setting (ide_drive_t *drive, char *name)
1016 {
1017 ide_settings_t **p, *setting;
1018
1019 p = (ide_settings_t **) &drive->settings;
1020
1021 while ((*p) && strcmp((*p)->name, name))
1022 p = &((*p)->next);
1023 if ((setting = (*p)) == NULL)
1024 return;
1025
1026 (*p) = setting->next;
1027
1028 kfree(setting->name);
1029 kfree(setting);
1030 }
1031
1032 /**
1033 * ide_find_setting_by_ioctl - find a drive specific ioctl
1034 * @drive: drive to scan
1035 * @cmd: ioctl command to handle
1036 *
1037 * Scan's the device setting table for a matching entry and returns
1038 * this or NULL if no entry is found. The caller must hold the
1039 * setting semaphore
1040 */
1041
1042 static ide_settings_t *ide_find_setting_by_ioctl (ide_drive_t *drive, int cmd)
1043 {
1044 ide_settings_t *setting = drive->settings;
1045
1046 while (setting) {
1047 if (setting->read_ioctl == cmd || setting->write_ioctl == cmd)
1048 break;
1049 setting = setting->next;
1050 }
1051
1052 return setting;
1053 }
1054
1055 /**
1056 * ide_find_setting_by_name - find a drive specific setting
1057 * @drive: drive to scan
1058 * @name: setting name
1059 *
1060 * Scan's the device setting table for a matching entry and returns
1061 * this or NULL if no entry is found. The caller must hold the
1062 * setting semaphore
1063 */
1064
1065 ide_settings_t *ide_find_setting_by_name (ide_drive_t *drive, char *name)
1066 {
1067 ide_settings_t *setting = drive->settings;
1068
1069 while (setting) {
1070 if (strcmp(setting->name, name) == 0)
1071 break;
1072 setting = setting->next;
1073 }
1074 return setting;
1075 }
1076
1077 /**
1078 * auto_remove_settings - remove driver specific settings
1079 * @drive: drive
1080 *
1081 * Automatically remove all the driver specific settings for this
1082 * drive. This function may sleep and must not be called from IRQ
1083 * context. The caller must hold ide_setting_sem.
1084 */
1085
1086 static void auto_remove_settings (ide_drive_t *drive)
1087 {
1088 ide_settings_t *setting;
1089 repeat:
1090 setting = drive->settings;
1091 while (setting) {
1092 if (setting->auto_remove) {
1093 __ide_remove_setting(drive, setting->name);
1094 goto repeat;
1095 }
1096 setting = setting->next;
1097 }
1098 }
1099
1100 /**
1101 * ide_read_setting - read an IDE setting
1102 * @drive: drive to read from
1103 * @setting: drive setting
1104 *
1105 * Read a drive setting and return the value. The caller
1106 * must hold the ide_setting_sem when making this call.
1107 *
1108 * BUGS: the data return and error are the same return value
1109 * so an error -EINVAL and true return of the same value cannot
1110 * be told apart
1111 */
1112
1113 int ide_read_setting (ide_drive_t *drive, ide_settings_t *setting)
1114 {
1115 int val = -EINVAL;
1116 unsigned long flags;
1117
1118 if ((setting->rw & SETTING_READ)) {
1119 spin_lock_irqsave(&ide_lock, flags);
1120 switch(setting->data_type) {
1121 case TYPE_BYTE:
1122 val = *((u8 *) setting->data);
1123 break;
1124 case TYPE_SHORT:
1125 val = *((u16 *) setting->data);
1126 break;
1127 case TYPE_INT:
1128 case TYPE_INTA:
1129 val = *((u32 *) setting->data);
1130 break;
1131 }
1132 spin_unlock_irqrestore(&ide_lock, flags);
1133 }
1134 return val;
1135 }
1136
1137 /**
1138 * ide_spin_wait_hwgroup - wait for group
1139 * @drive: drive in the group
1140 *
1141 * Wait for an IDE device group to go non busy and then return
1142 * holding the ide_lock which guards the hwgroup->busy status
1143 * and right to use it.
1144 */
1145
1146 int ide_spin_wait_hwgroup (ide_drive_t *drive)
1147 {
1148 ide_hwgroup_t *hwgroup = HWGROUP(drive);
1149 unsigned long timeout = jiffies + (3 * HZ);
1150
1151 spin_lock_irq(&ide_lock);
1152
1153 while (hwgroup->busy) {
1154 unsigned long lflags;
1155 spin_unlock_irq(&ide_lock);
1156 local_irq_set(lflags);
1157 if (time_after(jiffies, timeout)) {
1158 local_irq_restore(lflags);
1159 printk(KERN_ERR "%s: channel busy\n", drive->name);
1160 return -EBUSY;
1161 }
1162 local_irq_restore(lflags);
1163 spin_lock_irq(&ide_lock);
1164 }
1165 return 0;
1166 }
1167
1168 EXPORT_SYMBOL(ide_spin_wait_hwgroup);
1169
1170 /**
1171 * ide_write_setting - read an IDE setting
1172 * @drive: drive to read from
1173 * @setting: drive setting
1174 * @val: value
1175 *
1176 * Write a drive setting if it is possible. The caller
1177 * must hold the ide_setting_sem when making this call.
1178 *
1179 * BUGS: the data return and error are the same return value
1180 * so an error -EINVAL and true return of the same value cannot
1181 * be told apart
1182 *
1183 * FIXME: This should be changed to enqueue a special request
1184 * to the driver to change settings, and then wait on a sema for completion.
1185 * The current scheme of polling is kludgy, though safe enough.
1186 */
1187
1188 int ide_write_setting (ide_drive_t *drive, ide_settings_t *setting, int val)
1189 {
1190 int i;
1191 u32 *p;
1192
1193 if (!capable(CAP_SYS_ADMIN))
1194 return -EACCES;
1195 if (!(setting->rw & SETTING_WRITE))
1196 return -EPERM;
1197 if (val < setting->min || val > setting->max)
1198 return -EINVAL;
1199 if (setting->set)
1200 return setting->set(drive, val);
1201 if (ide_spin_wait_hwgroup(drive))
1202 return -EBUSY;
1203 switch (setting->data_type) {
1204 case TYPE_BYTE:
1205 *((u8 *) setting->data) = val;
1206 break;
1207 case TYPE_SHORT:
1208 *((u16 *) setting->data) = val;
1209 break;
1210 case TYPE_INT:
1211 *((u32 *) setting->data) = val;
1212 break;
1213 case TYPE_INTA:
1214 p = (u32 *) setting->data;
1215 for (i = 0; i < 1 << PARTN_BITS; i++, p++)
1216 *p = val;
1217 break;
1218 }
1219 spin_unlock_irq(&ide_lock);
1220 return 0;
1221 }
1222
1223 static int set_io_32bit(ide_drive_t *drive, int arg)
1224 {
1225 drive->io_32bit = arg;
1226 #ifdef CONFIG_BLK_DEV_DTC2278
1227 if (HWIF(drive)->chipset == ide_dtc2278)
1228 HWIF(drive)->drives[!drive->select.b.unit].io_32bit = arg;
1229 #endif /* CONFIG_BLK_DEV_DTC2278 */
1230 return 0;
1231 }
1232
1233 static int set_using_dma (ide_drive_t *drive, int arg)
1234 {
1235 #ifdef CONFIG_BLK_DEV_IDEDMA
1236 if (!drive->id || !(drive->id->capability & 1))
1237 return -EPERM;
1238 if (HWIF(drive)->ide_dma_check == NULL)
1239 return -EPERM;
1240 if (arg) {
1241 if (HWIF(drive)->ide_dma_check(drive)) return -EIO;
1242 if (HWIF(drive)->ide_dma_on(drive)) return -EIO;
1243 } else {
1244 if (__ide_dma_off(drive))
1245 return -EIO;
1246 }
1247 return 0;
1248 #else
1249 return -EPERM;
1250 #endif
1251 }
1252
1253 static int set_pio_mode (ide_drive_t *drive, int arg)
1254 {
1255 struct request rq;
1256
1257 if (!HWIF(drive)->tuneproc)
1258 return -ENOSYS;
1259 if (drive->special.b.set_tune)
1260 return -EBUSY;
1261 ide_init_drive_cmd(&rq);
1262 drive->tune_req = (u8) arg;
1263 drive->special.b.set_tune = 1;
1264 (void) ide_do_drive_cmd(drive, &rq, ide_wait);
1265 return 0;
1266 }
1267
1268 static int set_xfer_rate (ide_drive_t *drive, int arg)
1269 {
1270 int err = ide_wait_cmd(drive,
1271 WIN_SETFEATURES, (u8) arg,
1272 SETFEATURES_XFER, 0, NULL);
1273
1274 if (!err && arg) {
1275 ide_set_xfer_rate(drive, (u8) arg);
1276 ide_driveid_update(drive);
1277 }
1278 return err;
1279 }
1280
1281 /**
1282 * ide_add_generic_settings - generic ide settings
1283 * @drive: drive being configured
1284 *
1285 * Add the generic parts of the system settings to the /proc files and
1286 * ioctls for this IDE device. The caller must not be holding the
1287 * ide_setting_sem.
1288 */
1289
1290 void ide_add_generic_settings (ide_drive_t *drive)
1291 {
1292 /*
1293 * drive setting name read/write access read ioctl write ioctl data type min max mul_factor div_factor data pointer set function
1294 */
1295 ide_add_setting(drive, "io_32bit", drive->no_io_32bit ? SETTING_READ : SETTING_RW, HDIO_GET_32BIT, HDIO_SET_32BIT, TYPE_BYTE, 0, 1 + (SUPPORT_VLB_SYNC << 1), 1, 1, &drive->io_32bit, set_io_32bit);
1296 ide_add_setting(drive, "keepsettings", SETTING_RW, HDIO_GET_KEEPSETTINGS, HDIO_SET_KEEPSETTINGS, TYPE_BYTE, 0, 1, 1, 1, &drive->keep_settings, NULL);
1297 ide_add_setting(drive, "nice1", SETTING_RW, -1, -1, TYPE_BYTE, 0, 1, 1, 1, &drive->nice1, NULL);
1298 ide_add_setting(drive, "pio_mode", SETTING_WRITE, -1, HDIO_SET_PIO_MODE, TYPE_BYTE, 0, 255, 1, 1, NULL, set_pio_mode);
1299 ide_add_setting(drive, "unmaskirq", drive->no_unmask ? SETTING_READ : SETTING_RW, HDIO_GET_UNMASKINTR, HDIO_SET_UNMASKINTR, TYPE_BYTE, 0, 1, 1, 1, &drive->unmask, NULL);
1300 ide_add_setting(drive, "using_dma", SETTING_RW, HDIO_GET_DMA, HDIO_SET_DMA, TYPE_BYTE, 0, 1, 1, 1, &drive->using_dma, set_using_dma);
1301 ide_add_setting(drive, "init_speed", SETTING_RW, -1, -1, TYPE_BYTE, 0, 70, 1, 1, &drive->init_speed, NULL);
1302 ide_add_setting(drive, "current_speed", SETTING_RW, -1, -1, TYPE_BYTE, 0, 70, 1, 1, &drive->current_speed, set_xfer_rate);
1303 ide_add_setting(drive, "number", SETTING_RW, -1, -1, TYPE_BYTE, 0, 3, 1, 1, &drive->dn, NULL);
1304 }
1305
1306 /**
1307 * system_bus_clock - clock guess
1308 *
1309 * External version of the bus clock guess used by very old IDE drivers
1310 * for things like VLB timings. Should not be used.
1311 */
1312
1313 int system_bus_clock (void)
1314 {
1315 return((int) ((!system_bus_speed) ? ide_system_bus_speed() : system_bus_speed ));
1316 }
1317
1318 EXPORT_SYMBOL(system_bus_clock);
1319
1320 /*
1321 * Locking is badly broken here - since way back. That sucker is
1322 * root-only, but that's not an excuse... The real question is what
1323 * exclusion rules do we want here.
1324 */
1325 int ide_replace_subdriver (ide_drive_t *drive, const char *driver)
1326 {
1327 if (!drive->present || drive->usage || drive->dead)
1328 goto abort;
1329 if (DRIVER(drive)->cleanup(drive))
1330 goto abort;
1331 strlcpy(drive->driver_req, driver, sizeof(drive->driver_req));
1332 if (ata_attach(drive)) {
1333 spin_lock(&drives_lock);
1334 list_del_init(&drive->list);
1335 spin_unlock(&drives_lock);
1336 drive->driver_req[0] = 0;
1337 ata_attach(drive);
1338 } else {
1339 drive->driver_req[0] = 0;
1340 }
1341 if (DRIVER(drive)!= &idedefault_driver && !strcmp(DRIVER(drive)->name, driver))
1342 return 0;
1343 abort:
1344 return 1;
1345 }
1346
1347 /**
1348 * ata_attach - attach an ATA/ATAPI device
1349 * @drive: drive to attach
1350 *
1351 * Takes a drive that is as yet not assigned to any midlayer IDE
1352 * driver (or is assigned to the default driver) and figures out
1353 * which driver would like to own it. If nobody claims the drive
1354 * then it is automatically attached to the default driver used for
1355 * unclaimed objects.
1356 *
1357 * A return of zero indicates attachment to a driver, of one
1358 * attachment to the default driver.
1359 *
1360 * Takes drivers_lock.
1361 */
1362
1363 int ata_attach(ide_drive_t *drive)
1364 {
1365 struct list_head *p;
1366 spin_lock(&drivers_lock);
1367 list_for_each(p, &drivers) {
1368 ide_driver_t *driver = list_entry(p, ide_driver_t, drivers);
1369 if (!try_module_get(driver->owner))
1370 continue;
1371 spin_unlock(&drivers_lock);
1372 if (driver->attach(drive) == 0) {
1373 module_put(driver->owner);
1374 drive->gendev.driver = &driver->gen_driver;
1375 return 0;
1376 }
1377 spin_lock(&drivers_lock);
1378 module_put(driver->owner);
1379 }
1380 drive->gendev.driver = &idedefault_driver.gen_driver;
1381 spin_unlock(&drivers_lock);
1382 if(idedefault_driver.attach(drive) != 0)
1383 panic("ide: default attach failed");
1384 return 1;
1385 }
1386
1387 static int generic_ide_suspend(struct device *dev, pm_message_t state)
1388 {
1389 ide_drive_t *drive = dev->driver_data;
1390 struct request rq;
1391 struct request_pm_state rqpm;
1392 ide_task_t args;
1393
1394 memset(&rq, 0, sizeof(rq));
1395 memset(&rqpm, 0, sizeof(rqpm));
1396 memset(&args, 0, sizeof(args));
1397 rq.flags = REQ_PM_SUSPEND;
1398 rq.special = &args;
1399 rq.pm = &rqpm;
1400 rqpm.pm_step = ide_pm_state_start_suspend;
1401 rqpm.pm_state = state;
1402
1403 return ide_do_drive_cmd(drive, &rq, ide_wait);
1404 }
1405
1406 static int generic_ide_resume(struct device *dev)
1407 {
1408 ide_drive_t *drive = dev->driver_data;
1409 struct request rq;
1410 struct request_pm_state rqpm;
1411 ide_task_t args;
1412
1413 memset(&rq, 0, sizeof(rq));
1414 memset(&rqpm, 0, sizeof(rqpm));
1415 memset(&args, 0, sizeof(args));
1416 rq.flags = REQ_PM_RESUME;
1417 rq.special = &args;
1418 rq.pm = &rqpm;
1419 rqpm.pm_step = ide_pm_state_start_resume;
1420 rqpm.pm_state = 0;
1421
1422 return ide_do_drive_cmd(drive, &rq, ide_head_wait);
1423 }
1424
1425 int generic_ide_ioctl(struct file *file, struct block_device *bdev,
1426 unsigned int cmd, unsigned long arg)
1427 {
1428 ide_drive_t *drive = bdev->bd_disk->private_data;
1429 ide_settings_t *setting;
1430 int err = 0;
1431 void __user *p = (void __user *)arg;
1432
1433 down(&ide_setting_sem);
1434 if ((setting = ide_find_setting_by_ioctl(drive, cmd)) != NULL) {
1435 if (cmd == setting->read_ioctl) {
1436 err = ide_read_setting(drive, setting);
1437 up(&ide_setting_sem);
1438 return err >= 0 ? put_user(err, (long __user *)arg) : err;
1439 } else {
1440 if (bdev != bdev->bd_contains)
1441 err = -EINVAL;
1442 else
1443 err = ide_write_setting(drive, setting, arg);
1444 up(&ide_setting_sem);
1445 return err;
1446 }
1447 }
1448 up(&ide_setting_sem);
1449
1450 switch (cmd) {
1451 case HDIO_GETGEO:
1452 {
1453 struct hd_geometry geom;
1454 if (!p || (drive->media != ide_disk && drive->media != ide_floppy)) return -EINVAL;
1455 geom.heads = drive->bios_head;
1456 geom.sectors = drive->bios_sect;
1457 geom.cylinders = (u16)drive->bios_cyl; /* truncate */
1458 geom.start = get_start_sect(bdev);
1459 if (copy_to_user(p, &geom, sizeof(struct hd_geometry)))
1460 return -EFAULT;
1461 return 0;
1462 }
1463
1464 case HDIO_OBSOLETE_IDENTITY:
1465 case HDIO_GET_IDENTITY:
1466 if (bdev != bdev->bd_contains)
1467 return -EINVAL;
1468 if (drive->id_read == 0)
1469 return -ENOMSG;
1470 if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142))
1471 return -EFAULT;
1472 return 0;
1473
1474 case HDIO_GET_NICE:
1475 return put_user(drive->dsc_overlap << IDE_NICE_DSC_OVERLAP |
1476 drive->atapi_overlap << IDE_NICE_ATAPI_OVERLAP |
1477 drive->nice0 << IDE_NICE_0 |
1478 drive->nice1 << IDE_NICE_1 |
1479 drive->nice2 << IDE_NICE_2,
1480 (long __user *) arg);
1481
1482 #ifdef CONFIG_IDE_TASK_IOCTL
1483 case HDIO_DRIVE_TASKFILE:
1484 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
1485 return -EACCES;
1486 switch(drive->media) {
1487 case ide_disk:
1488 return ide_taskfile_ioctl(drive, cmd, arg);
1489 default:
1490 return -ENOMSG;
1491 }
1492 #endif /* CONFIG_IDE_TASK_IOCTL */
1493
1494 case HDIO_DRIVE_CMD:
1495 if (!capable(CAP_SYS_RAWIO))
1496 return -EACCES;
1497 return ide_cmd_ioctl(drive, cmd, arg);
1498
1499 case HDIO_DRIVE_TASK:
1500 if (!capable(CAP_SYS_RAWIO))
1501 return -EACCES;
1502 return ide_task_ioctl(drive, cmd, arg);
1503
1504 case HDIO_SCAN_HWIF:
1505 {
1506 hw_regs_t hw;
1507 int args[3];
1508 if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1509 if (copy_from_user(args, p, 3 * sizeof(int)))
1510 return -EFAULT;
1511 memset(&hw, 0, sizeof(hw));
1512 ide_init_hwif_ports(&hw, (unsigned long) args[0],
1513 (unsigned long) args[1], NULL);
1514 hw.irq = args[2];
1515 if (ide_register_hw(&hw, NULL) == -1)
1516 return -EIO;
1517 return 0;
1518 }
1519 case HDIO_UNREGISTER_HWIF:
1520 if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1521 /* (arg > MAX_HWIFS) checked in function */
1522 ide_unregister(arg);
1523 return 0;
1524 case HDIO_SET_NICE:
1525 if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1526 if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1))))
1527 return -EPERM;
1528 drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1;
1529 if (drive->dsc_overlap && !DRIVER(drive)->supports_dsc_overlap) {
1530 drive->dsc_overlap = 0;
1531 return -EPERM;
1532 }
1533 drive->nice1 = (arg >> IDE_NICE_1) & 1;
1534 return 0;
1535 case HDIO_DRIVE_RESET:
1536 {
1537 unsigned long flags;
1538 if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1539
1540 /*
1541 * Abort the current command on the
1542 * group if there is one, taking
1543 * care not to allow anything else
1544 * to be queued and to die on the
1545 * spot if we miss one somehow
1546 */
1547
1548 spin_lock_irqsave(&ide_lock, flags);
1549
1550 ide_abort(drive, "drive reset");
1551
1552 if(HWGROUP(drive)->handler)
1553 BUG();
1554
1555 /* Ensure nothing gets queued after we
1556 drop the lock. Reset will clear the busy */
1557
1558 HWGROUP(drive)->busy = 1;
1559 spin_unlock_irqrestore(&ide_lock, flags);
1560 (void) ide_do_reset(drive);
1561
1562 return 0;
1563 }
1564
1565 case CDROMEJECT:
1566 case CDROMCLOSETRAY:
1567 return scsi_cmd_ioctl(file, bdev->bd_disk, cmd, p);
1568
1569 case HDIO_GET_BUSSTATE:
1570 if (!capable(CAP_SYS_ADMIN))
1571 return -EACCES;
1572 if (put_user(HWIF(drive)->bus_state, (long __user *)arg))
1573 return -EFAULT;
1574 return 0;
1575
1576 case HDIO_SET_BUSSTATE:
1577 if (!capable(CAP_SYS_ADMIN))
1578 return -EACCES;
1579 if (HWIF(drive)->busproc)
1580 return HWIF(drive)->busproc(drive, (int)arg);
1581 return -EOPNOTSUPP;
1582 default:
1583 return -EINVAL;
1584 }
1585 }
1586
1587 EXPORT_SYMBOL(generic_ide_ioctl);
1588
1589 /*
1590 * stridx() returns the offset of c within s,
1591 * or -1 if c is '\0' or not found within s.
1592 */
1593 static int __init stridx (const char *s, char c)
1594 {
1595 char *i = strchr(s, c);
1596 return (i && c) ? i - s : -1;
1597 }
1598
1599 /*
1600 * match_parm() does parsing for ide_setup():
1601 *
1602 * 1. the first char of s must be '='.
1603 * 2. if the remainder matches one of the supplied keywords,
1604 * the index (1 based) of the keyword is negated and returned.
1605 * 3. if the remainder is a series of no more than max_vals numbers
1606 * separated by commas, the numbers are saved in vals[] and a
1607 * count of how many were saved is returned. Base10 is assumed,
1608 * and base16 is allowed when prefixed with "0x".
1609 * 4. otherwise, zero is returned.
1610 */
1611 static int __init match_parm (char *s, const char *keywords[], int vals[], int max_vals)
1612 {
1613 static const char *decimal = "0123456789";
1614 static const char *hex = "0123456789abcdef";
1615 int i, n;
1616
1617 if (*s++ == '=') {
1618 /*
1619 * Try matching against the supplied keywords,
1620 * and return -(index+1) if we match one
1621 */
1622 if (keywords != NULL) {
1623 for (i = 0; *keywords != NULL; ++i) {
1624 if (!strcmp(s, *keywords++))
1625 return -(i+1);
1626 }
1627 }
1628 /*
1629 * Look for a series of no more than "max_vals"
1630 * numeric values separated by commas, in base10,
1631 * or base16 when prefixed with "0x".
1632 * Return a count of how many were found.
1633 */
1634 for (n = 0; (i = stridx(decimal, *s)) >= 0;) {
1635 vals[n] = i;
1636 while ((i = stridx(decimal, *++s)) >= 0)
1637 vals[n] = (vals[n] * 10) + i;
1638 if (*s == 'x' && !vals[n]) {
1639 while ((i = stridx(hex, *++s)) >= 0)
1640 vals[n] = (vals[n] * 0x10) + i;
1641 }
1642 if (++n == max_vals)
1643 break;
1644 if (*s == ',' || *s == ';')
1645 ++s;
1646 }
1647 if (!*s)
1648 return n;
1649 }
1650 return 0; /* zero = nothing matched */
1651 }
1652
1653 #ifdef CONFIG_BLK_DEV_ALI14XX
1654 static int __initdata probe_ali14xx;
1655 extern int ali14xx_init(void);
1656 #endif
1657 #ifdef CONFIG_BLK_DEV_UMC8672
1658 static int __initdata probe_umc8672;
1659 extern int umc8672_init(void);
1660 #endif
1661 #ifdef CONFIG_BLK_DEV_DTC2278
1662 static int __initdata probe_dtc2278;
1663 extern int dtc2278_init(void);
1664 #endif
1665 #ifdef CONFIG_BLK_DEV_HT6560B
1666 static int __initdata probe_ht6560b;
1667 extern int ht6560b_init(void);
1668 #endif
1669 #ifdef CONFIG_BLK_DEV_QD65XX
1670 static int __initdata probe_qd65xx;
1671 extern int qd65xx_init(void);
1672 #endif
1673
1674 static int __initdata is_chipset_set[MAX_HWIFS];
1675
1676 /*
1677 * ide_setup() gets called VERY EARLY during initialization,
1678 * to handle kernel "command line" strings beginning with "hdx=" or "ide".
1679 *
1680 * Remember to update Documentation/ide.txt if you change something here.
1681 */
1682 static int __init ide_setup(char *s)
1683 {
1684 int i, vals[3];
1685 ide_hwif_t *hwif;
1686 ide_drive_t *drive;
1687 unsigned int hw, unit;
1688 const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1);
1689 const char max_hwif = '' + (MAX_HWIFS - 1);
1690
1691
1692 if (strncmp(s,"hd",2) == 0 && s[2] == '=') /* hd= is for hd.c */
1693 return 0; /* driver and not us */
1694
1695 if (strncmp(s,"ide",3) && strncmp(s,"idebus",6) && strncmp(s,"hd",2))
1696 return 0;
1697
1698 printk(KERN_INFO "ide_setup: %s", s);
1699 init_ide_data ();
1700
1701 #ifdef CONFIG_BLK_DEV_IDEDOUBLER
1702 if (!strcmp(s, "ide=doubler")) {
1703 extern int ide_doubler;
1704
1705 printk(" : Enabled support for IDE doublers\n");
1706 ide_doubler = 1;
1707 return 1;
1708 }
1709 #endif /* CONFIG_BLK_DEV_IDEDOUBLER */
1710
1711 if (!strcmp(s, "ide=nodma")) {
1712 printk(" : Prevented DMA\n");
1713 noautodma = 1;
1714 return 1;
1715 }
1716
1717 #ifdef CONFIG_BLK_DEV_IDEPCI
1718 if (!strcmp(s, "ide=reverse")) {
1719 ide_scan_direction = 1;
1720 printk(" : Enabled support for IDE inverse scan order.\n");
1721 return 1;
1722 }
1723 #endif /* CONFIG_BLK_DEV_IDEPCI */
1724
1725 /*
1726 * Look for drive options: "hdx="
1727 */
1728 if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) {
1729 const char *hd_words[] = {
1730 "none", "noprobe", "nowerr", "cdrom", "serialize",
1731 "autotune", "noautotune", "minus8", "swapdata", "bswap",
1732 "minus11", "remap", "remap63", "scsi", NULL };
1733 unit = s[2] - 'a';
1734 hw = unit / MAX_DRIVES;
1735 unit = unit % MAX_DRIVES;
1736 hwif = &ide_hwifs[hw];
1737 drive = &hwif->drives[unit];
1738 if (strncmp(s + 4, "ide-", 4) == 0) {
1739 strlcpy(drive->driver_req, s + 4, sizeof(drive->driver_req));
1740 goto done;
1741 }
1742 switch (match_parm(&s[3], hd_words, vals, 3)) {
1743 case -1: /* "none" */
1744 case -2: /* "noprobe" */
1745 drive->noprobe = 1;
1746 goto done;
1747 case -3: /* "nowerr" */
1748 drive->bad_wstat = BAD_R_STAT;
1749 hwif->noprobe = 0;
1750 goto done;
1751 case -4: /* "cdrom" */
1752 drive->present = 1;
1753 drive->media = ide_cdrom;
1754 hwif->noprobe = 0;
1755 goto done;
1756 case -5: /* "serialize" */
1757 printk(" -- USE \"ide%d=serialize\" INSTEAD", hw);
1758 goto do_serialize;
1759 case -6: /* "autotune" */
1760 drive->autotune = IDE_TUNE_AUTO;
1761 goto obsolete_option;
1762 case -7: /* "noautotune" */
1763 drive->autotune = IDE_TUNE_NOAUTO;
1764 goto obsolete_option;
1765 case -9: /* "swapdata" */
1766 case -10: /* "bswap" */
1767 drive->bswap = 1;
1768 goto done;
1769 case -12: /* "remap" */
1770 drive->remap_0_to_1 = 1;
1771 goto done;
1772 case -13: /* "remap63" */
1773 drive->sect0 = 63;
1774 goto done;
1775 case -14: /* "scsi" */
1776 drive->scsi = 1;
1777 goto done;
1778 case 3: /* cyl,head,sect */
1779 drive->media = ide_disk;
1780 drive->cyl = drive->bios_cyl = vals[0];
1781 drive->head = drive->bios_head = vals[1];
1782 drive->sect = drive->bios_sect = vals[2];
1783 drive->present = 1;
1784 drive->forced_geom = 1;
1785 hwif->noprobe = 0;
1786 goto done;
1787 default:
1788 goto bad_option;
1789 }
1790 }
1791
1792 if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e')
1793 goto bad_option;
1794 /*
1795 * Look for bus speed option: "idebus="
1796 */
1797 if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') {
1798 if (match_parm(&s[6], NULL, vals, 1) != 1)
1799 goto bad_option;
1800 if (vals[0] >= 20 && vals[0] <= 66) {
1801 idebus_parameter = vals[0];
1802 } else
1803 printk(" -- BAD BUS SPEED! Expected value from 20 to 66");
1804 goto done;
1805 }
1806 /*
1807 * Look for interface options: "idex="
1808 */
1809 if (s[3] >= '' && s[3] <= max_hwif) {
1810 /*
1811 * Be VERY CAREFUL changing this: note hardcoded indexes below
1812 * (-8, -9, -10) are reserved to ease the hardcoding.
1813 */
1814 static const char *ide_words[] = {
1815 "noprobe", "serialize", "autotune", "noautotune",
1816 "reset", "dma", "ata66", "minus8", "minus9",
1817 "minus10", "four", "qd65xx", "ht6560b", "cmd640_vlb",
1818 "dtc2278", "umc8672", "ali14xx", NULL };
1819 hw = s[3] - '';
1820 hwif = &ide_hwifs[hw];
1821 i = match_parm(&s[4], ide_words, vals, 3);
1822
1823 /*
1824 * Cryptic check to ensure chipset not already set for hwif.
1825 * Note: we can't depend on hwif->chipset here.
1826 */
1827 if ((i >= -18 && i <= -11) || (i > 0 && i <= 3)) {
1828 /* chipset already specified */
1829 if (is_chipset_set[hw])
1830 goto bad_option;
1831 if (i > -18 && i <= -11) {
1832 /* these drivers are for "ide0=" only */
1833 if (hw != 0)
1834 goto bad_hwif;
1835 /* chipset already specified for 2nd port */
1836 if (is_chipset_set[hw+1])
1837 goto bad_option;
1838 }
1839 is_chipset_set[hw] = 1;
1840 printk("\n");
1841 }
1842
1843 switch (i) {
1844 #ifdef CONFIG_BLK_DEV_ALI14XX
1845 case -17: /* "ali14xx" */
1846 probe_ali14xx = 1;
1847 goto done;
1848 #endif
1849 #ifdef CONFIG_BLK_DEV_UMC8672
1850 case -16: /* "umc8672" */
1851 probe_umc8672 = 1;
1852 goto done;
1853 #endif
1854 #ifdef CONFIG_BLK_DEV_DTC2278
1855 case -15: /* "dtc2278" */
1856 probe_dtc2278 = 1;
1857 goto done;
1858 #endif
1859 #ifdef CONFIG_BLK_DEV_CMD640
1860 case -14: /* "cmd640_vlb" */
1861 {
1862 extern int cmd640_vlb; /* flag for cmd640.c */
1863 cmd640_vlb = 1;
1864 goto done;
1865 }
1866 #endif
1867 #ifdef CONFIG_BLK_DEV_HT6560B
1868 case -13: /* "ht6560b" */
1869 probe_ht6560b = 1;
1870 goto done;
1871 #endif
1872 #ifdef CONFIG_BLK_DEV_QD65XX
1873 case -12: /* "qd65xx" */
1874 probe_qd65xx = 1;
1875 goto done;
1876 #endif
1877 #ifdef CONFIG_BLK_DEV_4DRIVES
1878 case -11: /* "four" drives on one set of ports */
1879 {
1880 ide_hwif_t *mate = &ide_hwifs[hw^1];
1881 mate->drives[0].select.all ^= 0x20;
1882 mate->drives[1].select.all ^= 0x20;
1883 hwif->chipset = mate->chipset = ide_4drives;
1884 mate->irq = hwif->irq;
1885 memcpy(mate->io_ports, hwif->io_ports, sizeof(hwif->io_ports));
1886 goto do_serialize;
1887 }
1888 #endif /* CONFIG_BLK_DEV_4DRIVES */
1889 case -10: /* minus10 */
1890 case -9: /* minus9 */
1891 case -8: /* minus8 */
1892 goto bad_option;
1893 case -7: /* ata66 */
1894 #ifdef CONFIG_BLK_DEV_IDEPCI
1895 hwif->udma_four = 1;
1896 goto obsolete_option;
1897 #else
1898 goto bad_hwif;
1899 #endif
1900 case -6: /* dma */
1901 hwif->autodma = 1;
1902 goto obsolete_option;
1903 case -5: /* "reset" */
1904 hwif->reset = 1;
1905 goto obsolete_option;
1906 case -4: /* "noautotune" */
1907 hwif->drives[0].autotune = IDE_TUNE_NOAUTO;
1908 hwif->drives[1].autotune = IDE_TUNE_NOAUTO;
1909 goto obsolete_option;
1910 case -3: /* "autotune" */
1911 hwif->drives[0].autotune = IDE_TUNE_AUTO;
1912 hwif->drives[1].autotune = IDE_TUNE_AUTO;
1913 goto obsolete_option;
1914 case -2: /* "serialize" */
1915 do_serialize:
1916 hwif->mate = &ide_hwifs[hw^1];
1917 hwif->mate->mate = hwif;
1918 hwif->serialized = hwif->mate->serialized = 1;
1919 goto obsolete_option;
1920
1921 case -1: /* "noprobe" */
1922 hwif->noprobe = 1;
1923 goto done;
1924
1925 case 1: /* base */
1926 vals[1] = vals[0] + 0x206; /* default ctl */
1927 case 2: /* base,ctl */
1928 vals[2] = 0; /* default irq = probe for it */
1929 case 3: /* base,ctl,irq */
1930 hwif->hw.irq = vals[2];
1931 ide_init_hwif_ports(&hwif->hw, (unsigned long) vals[0], (unsigned long) vals[1], &hwif->irq);
1932 memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->io_ports));
1933 hwif->irq = vals[2];
1934 hwif->noprobe = 0;
1935 hwif->chipset = ide_forced;
1936 goto obsolete_option;
1937
1938 case 0: goto bad_option;
1939 default:
1940 printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n");
1941 return 1;
1942 }
1943 }
1944 bad_option:
1945 printk(" -- BAD OPTION\n");
1946 return 1;
1947 obsolete_option:
1948 printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n");
1949 return 1;
1950 bad_hwif:
1951 printk("-- NOT SUPPORTED ON ide%d", hw);
1952 done:
1953 printk("\n");
1954 return 1;
1955 }
1956
1957 extern void pnpide_init(void);
1958 extern void h8300_ide_init(void);
1959
1960 /*
1961 * probe_for_hwifs() finds/initializes "known" IDE interfaces
1962 */
1963 static void __init probe_for_hwifs (void)
1964 {
1965 #ifdef CONFIG_BLK_DEV_IDEPCI
1966 ide_scan_pcibus(ide_scan_direction);
1967 #endif /* CONFIG_BLK_DEV_IDEPCI */
1968
1969 #ifdef CONFIG_ETRAX_IDE
1970 {
1971 extern void init_e100_ide(void);
1972 init_e100_ide();
1973 }
1974 #endif /* CONFIG_ETRAX_IDE */
1975 #ifdef CONFIG_BLK_DEV_CMD640
1976 {
1977 extern void ide_probe_for_cmd640x(void);
1978 ide_probe_for_cmd640x();
1979 }
1980 #endif /* CONFIG_BLK_DEV_CMD640 */
1981 #ifdef CONFIG_BLK_DEV_IDE_PMAC
1982 {
1983 extern void pmac_ide_probe(void);
1984 pmac_ide_probe();
1985 }
1986 #endif /* CONFIG_BLK_DEV_IDE_PMAC */
1987 #ifdef CONFIG_BLK_DEV_GAYLE
1988 {
1989 extern void gayle_init(void);
1990 gayle_init();
1991 }
1992 #endif /* CONFIG_BLK_DEV_GAYLE */
1993 #ifdef CONFIG_BLK_DEV_FALCON_IDE
1994 {
1995 extern void falconide_init(void);
1996 falconide_init();
1997 }
1998 #endif /* CONFIG_BLK_DEV_FALCON_IDE */
1999 #ifdef CONFIG_BLK_DEV_MAC_IDE
2000 {
2001 extern void macide_init(void);
2002 macide_init();
2003 }
2004 #endif /* CONFIG_BLK_DEV_MAC_IDE */
2005 #ifdef CONFIG_BLK_DEV_Q40IDE
2006 {
2007 extern void q40ide_init(void);
2008 q40ide_init();
2009 }
2010 #endif /* CONFIG_BLK_DEV_Q40IDE */
2011 #ifdef CONFIG_BLK_DEV_BUDDHA
2012 {
2013 extern void buddha_init(void);
2014 buddha_init();
2015 }
2016 #endif /* CONFIG_BLK_DEV_BUDDHA */
2017 #ifdef CONFIG_BLK_DEV_IDEPNP
2018 pnpide_init();
2019 #endif
2020 #ifdef CONFIG_H8300
2021 h8300_ide_init();
2022 #endif
2023 }
2024
2025 static ide_startstop_t default_do_request (ide_drive_t *drive, struct request *rq, sector_t block)
2026 {
2027 ide_end_request(drive, 0, 0);
2028 return ide_stopped;
2029 }
2030
2031 static int default_end_request (ide_drive_t *drive, int uptodate, int nr_sects)
2032 {
2033 return ide_end_request(drive, uptodate, nr_sects);
2034 }
2035
2036 static ide_startstop_t
2037 default_error(ide_drive_t *drive, struct request *rq, u8 stat, u8 err)
2038 {
2039 return __ide_error(drive, rq, stat, err);
2040 }
2041
2042 static void default_pre_reset (ide_drive_t *drive)
2043 {
2044 }
2045
2046 static sector_t default_capacity (ide_drive_t *drive)
2047 {
2048 return 0x7fffffff;
2049 }
2050
2051 static ide_startstop_t default_special (ide_drive_t *drive)
2052 {
2053 special_t *s = &drive->special;
2054
2055 s->all = 0;
2056 drive->mult_req = 0;
2057 return ide_stopped;
2058 }
2059
2060 static ide_startstop_t default_abort(ide_drive_t *drive, struct request *rq)
2061 {
2062 return __ide_abort(drive, rq);
2063 }
2064
2065 static ide_startstop_t default_start_power_step(ide_drive_t *drive,
2066 struct request *rq)
2067 {
2068 rq->pm->pm_step = ide_pm_state_completed;
2069 return ide_stopped;
2070 }
2071
2072 static void setup_driver_defaults (ide_driver_t *d)
2073 {
2074 BUG_ON(d->attach == NULL || d->cleanup == NULL);
2075
2076 if (d->do_request == NULL) d->do_request = default_do_request;
2077 if (d->end_request == NULL) d->end_request = default_end_request;
2078 if (d->error == NULL) d->error = default_error;
2079 if (d->abort == NULL) d->abort = default_abort;
2080 if (d->pre_reset == NULL) d->pre_reset = default_pre_reset;
2081 if (d->capacity == NULL) d->capacity = default_capacity;
2082 if (d->special == NULL) d->special = default_special;
2083 if (d->start_power_step == NULL)
2084 d->start_power_step = default_start_power_step;
2085 }
2086
2087 int ide_register_subdriver(ide_drive_t *drive, ide_driver_t *driver)
2088 {
2089 unsigned long flags;
2090
2091 BUG_ON(!drive->driver);
2092
2093 spin_lock_irqsave(&ide_lock, flags);
2094 if (!drive->present || drive->driver != &idedefault_driver ||
2095 drive->usage || drive->dead) {
2096 spin_unlock_irqrestore(&ide_lock, flags);
2097 return 1;
2098 }
2099 drive->driver = driver;
2100 spin_unlock_irqrestore(&ide_lock, flags);
2101 spin_lock(&drives_lock);
2102 list_add_tail(&drive->list, &driver->drives);
2103 spin_unlock(&drives_lock);
2104 // printk(KERN_INFO "%s: attached %s driver.\n", drive->name, driver->name);
2105 if ((drive->autotune == IDE_TUNE_DEFAULT) ||
2106 (drive->autotune == IDE_TUNE_AUTO)) {
2107 /* DMA timings and setup moved to ide-probe.c */
2108 drive->dsc_overlap = (drive->next != drive && driver->supports_dsc_overlap);
2109 drive->nice1 = 1;
2110 }
2111 #ifdef CONFIG_PROC_FS
2112 if (drive->driver != &idedefault_driver) {
2113 ide_add_proc_entries(drive->proc, generic_subdriver_entries, drive);
2114 ide_add_proc_entries(drive->proc, driver->proc, drive);
2115 }
2116 #endif
2117 return 0;
2118 }
2119
2120 EXPORT_SYMBOL(ide_register_subdriver);
2121
2122 /**
2123 * ide_unregister_subdriver - disconnect drive from driver
2124 * @drive: drive to unplug
2125 *
2126 * Disconnect a drive from the driver it was attached to and then
2127 * clean up the various proc files and other objects attached to it.
2128 *
2129 * Takes ide_setting_sem, ide_lock and drives_lock.
2130 * Caller must hold none of the locks.
2131 *
2132 * No locking versus subdriver unload because we are moving to the
2133 * default driver anyway. Wants double checking.
2134 */
2135
2136 int ide_unregister_subdriver (ide_drive_t *drive)
2137 {
2138 unsigned long flags;
2139
2140 down(&ide_setting_sem);
2141 spin_lock_irqsave(&ide_lock, flags);
2142 if (drive->usage || drive->driver == &idedefault_driver || DRIVER(drive)->busy) {
2143 spin_unlock_irqrestore(&ide_lock, flags);
2144 up(&ide_setting_sem);
2145 return 1;
2146 }
2147 #ifdef CONFIG_PROC_FS
2148 ide_remove_proc_entries(drive->proc, DRIVER(drive)->proc);
2149 ide_remove_proc_entries(drive->proc, generic_subdriver_entries);
2150 #endif
2151 auto_remove_settings(drive);
2152 drive->driver = &idedefault_driver;
2153 spin_unlock_irqrestore(&ide_lock, flags);
2154 up(&ide_setting_sem);
2155 spin_lock(&drives_lock);
2156 list_del_init(&drive->list);
2157 spin_unlock(&drives_lock);
2158 /* drive will be added to &idedefault_driver->drives in ata_attach() */
2159 return 0;
2160 }
2161
2162 EXPORT_SYMBOL(ide_unregister_subdriver);
2163
2164 static int ide_drive_remove(struct device * dev)
2165 {
2166 ide_drive_t * drive = container_of(dev,ide_drive_t,gendev);
2167 DRIVER(drive)->cleanup(drive);
2168 return 0;
2169 }
2170
2171 /**
2172 * ide_register_driver - register IDE device driver
2173 * @driver: the IDE device driver
2174 *
2175 * Register a new device driver and then scan the devices
2176 * on the IDE bus in case any should be attached to the
2177 * driver we have just registered. If so attach them.
2178 *
2179 * Takes drivers_lock and drives_lock.
2180 */
2181
2182 int ide_register_driver(ide_driver_t *driver)
2183 {
2184 struct list_head list;
2185 struct list_head *list_loop;
2186 struct list_head *tmp_storage;
2187
2188 setup_driver_defaults(driver);
2189
2190 spin_lock(&drivers_lock);
2191 list_add(&driver->drivers, &drivers);
2192 spin_unlock(&drivers_lock);
2193
2194 INIT_LIST_HEAD(&list);
2195 spin_lock(&drives_lock);
2196 list_splice_init(&idedefault_driver.drives, &list);
2197 spin_unlock(&drives_lock);
2198
2199 list_for_each_safe(list_loop, tmp_storage, &list) {
2200 ide_drive_t *drive = container_of(list_loop, ide_drive_t, list);
2201 list_del_init(&drive->list);
2202 if (drive->present)
2203 ata_attach(drive);
2204 }
2205 driver->gen_driver.name = (char *) driver->name;
2206 driver->gen_driver.bus = &ide_bus_type;
2207 driver->gen_driver.remove = ide_drive_remove;
2208 return driver_register(&driver->gen_driver);
2209 }
2210
2211 EXPORT_SYMBOL(ide_register_driver);
2212
2213 /**
2214 * ide_unregister_driver - unregister IDE device driver
2215 * @driver: the IDE device driver
2216 *
2217 * Called when a driver module is being unloaded. We reattach any
2218 * devices to whatever driver claims them next (typically the default
2219 * driver).
2220 *
2221 * Takes drivers_lock and called functions will take ide_setting_sem.
2222 */
2223
2224 void ide_unregister_driver(ide_driver_t *driver)
2225 {
2226 ide_drive_t *drive;
2227
2228 spin_lock(&drivers_lock);
2229 list_del(&driver->drivers);
2230 spin_unlock(&drivers_lock);
2231
2232 driver_unregister(&driver->gen_driver);
2233
2234 while(!list_empty(&driver->drives)) {
2235 drive = list_entry(driver->drives.next, ide_drive_t, list);
2236 if (driver->cleanup(drive)) {
2237 printk(KERN_ERR "%s: cleanup_module() called while still busy\n", drive->name);
2238 BUG();
2239 }
2240 ata_attach(drive);
2241 }
2242 }
2243
2244 EXPORT_SYMBOL(ide_unregister_driver);
2245
2246 struct block_device_operations ide_fops[] = {{
2247 .owner = THIS_MODULE,
2248 .open = ide_open,
2249 }};
2250
2251 EXPORT_SYMBOL(ide_fops);
2252
2253 /*
2254 * Probe module
2255 */
2256
2257 EXPORT_SYMBOL(ide_lock);
2258
2259 struct bus_type ide_bus_type = {
2260 .name = "ide",
2261 .suspend = generic_ide_suspend,
2262 .resume = generic_ide_resume,
2263 };
2264
2265 /*
2266 * This is gets invoked once during initialization, to set *everything* up
2267 */
2268 static int __init ide_init(void)
2269 {
2270 printk(KERN_INFO "Uniform Multi-Platform E-IDE driver " REVISION "\n");
2271 devfs_mk_dir("ide");
2272 system_bus_speed = ide_system_bus_speed();
2273
2274 bus_register(&ide_bus_type);
2275
2276 init_ide_data();
2277
2278 #ifdef CONFIG_PROC_FS
2279 proc_ide_root = proc_mkdir("ide", NULL);
2280 #endif
2281
2282 #ifdef CONFIG_BLK_DEV_ALI14XX
2283 if (probe_ali14xx)
2284 (void)ali14xx_init();
2285 #endif
2286 #ifdef CONFIG_BLK_DEV_UMC8672
2287 if (probe_umc8672)
2288 (void)umc8672_init();
2289 #endif
2290 #ifdef CONFIG_BLK_DEV_DTC2278
2291 if (probe_dtc2278)
2292 (void)dtc2278_init();
2293 #endif
2294 #ifdef CONFIG_BLK_DEV_HT6560B
2295 if (probe_ht6560b)
2296 (void)ht6560b_init();
2297 #endif
2298 #ifdef CONFIG_BLK_DEV_QD65XX
2299 if (probe_qd65xx)
2300 (void)qd65xx_init();
2301 #endif
2302
2303 initializing = 1;
2304 /* Probe for special PCI and other "known" interface chipsets. */
2305 probe_for_hwifs();
2306 initializing = 0;
2307
2308 #ifdef CONFIG_PROC_FS
2309 proc_ide_create();
2310 #endif
2311 return 0;
2312 }
2313
2314 #ifdef MODULE
2315 static char *options = NULL;
2316 module_param(options, charp, 0);
2317 MODULE_LICENSE("GPL");
2318
2319 static void __init parse_options (char *line)
2320 {
2321 char *next = line;
2322
2323 if (line == NULL || !*line)
2324 return;
2325 while ((line = next) != NULL) {
2326 if ((next = strchr(line,' ')) != NULL)
2327 *next++ = 0;
2328 if (!ide_setup(line))
2329 printk (KERN_INFO "Unknown option '%s'\n", line);
2330 }
2331 }
2332
2333 int init_module (void)
2334 {
2335 parse_options(options);
2336 return ide_init();
2337 }
2338
2339 void cleanup_module (void)
2340 {
2341 int index;
2342
2343 for (index = 0; index < MAX_HWIFS; ++index)
2344 ide_unregister(index);
2345
2346 #ifdef CONFIG_PROC_FS
2347 proc_ide_destroy();
2348 #endif
2349 devfs_remove("ide");
2350
2351 bus_unregister(&ide_bus_type);
2352 }
2353
2354 #else /* !MODULE */
2355
2356 __setup("", ide_setup);
2357
2358 module_init(ide_init);
2359
2360 #endif /* MODULE */
2361
|
This page was automatically generated by the
LXR engine.
|