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-rw-r--r--drivers/ide/ide.c2269
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diff --git a/drivers/ide/ide.c b/drivers/ide/ide.c
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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
167static 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
173static int idebus_parameter; /* holds the "idebus=" parameter */
174static int system_bus_speed; /* holds what we think is VESA/PCI bus speed */
175static int initializing; /* set while initializing built-in drivers */
176
177DECLARE_MUTEX(ide_cfg_sem);
178 __cacheline_aligned_in_smp DEFINE_SPINLOCK(ide_lock);
179
180#ifdef CONFIG_BLK_DEV_IDEPCI
181static int ide_scan_direction; /* THIS was formerly 2.2.x pci=reverse */
182#endif
183
184#ifdef CONFIG_IDEDMA_AUTO
185int noautodma = 0;
186#else
187int noautodma = 1;
188#endif
189
190EXPORT_SYMBOL(noautodma);
191
192/*
193 * This is declared extern in ide.h, for access by other IDE modules:
194 */
195ide_hwif_t ide_hwifs[MAX_HWIFS]; /* master data repository */
196
197EXPORT_SYMBOL(ide_hwifs);
198
199static struct list_head ide_drives = LIST_HEAD_INIT(ide_drives);
200
201/*
202 * Do not even *think* about calling this!
203 */
204static void init_hwif_data(ide_hwif_t *hwif, unsigned int index)
205{
206 unsigned int unit;
207
208 /* bulk initialize hwif & drive info with zeros */
209 memset(hwif, 0, sizeof(ide_hwif_t));
210
211 /* fill in any non-zero initial values */
212 hwif->index = index;
213 hwif->major = ide_hwif_to_major[index];
214
215 hwif->name[0] = 'i';
216 hwif->name[1] = 'd';
217 hwif->name[2] = 'e';
218 hwif->name[3] = '0' + index;
219
220 hwif->bus_state = BUSSTATE_ON;
221
222 hwif->atapi_dma = 0; /* disable all atapi dma */
223 hwif->ultra_mask = 0x80; /* disable all ultra */
224 hwif->mwdma_mask = 0x80; /* disable all mwdma */
225 hwif->swdma_mask = 0x80; /* disable all swdma */
226
227 sema_init(&hwif->gendev_rel_sem, 0);
228
229 default_hwif_iops(hwif);
230 default_hwif_transport(hwif);
231 for (unit = 0; unit < MAX_DRIVES; ++unit) {
232 ide_drive_t *drive = &hwif->drives[unit];
233
234 drive->media = ide_disk;
235 drive->select.all = (unit<<4)|0xa0;
236 drive->hwif = hwif;
237 drive->ctl = 0x08;
238 drive->ready_stat = READY_STAT;
239 drive->bad_wstat = BAD_W_STAT;
240 drive->special.b.recalibrate = 1;
241 drive->special.b.set_geometry = 1;
242 drive->name[0] = 'h';
243 drive->name[1] = 'd';
244 drive->name[2] = 'a' + (index * MAX_DRIVES) + unit;
245 drive->max_failures = IDE_DEFAULT_MAX_FAILURES;
246 drive->using_dma = 0;
247 drive->is_flash = 0;
248 drive->vdma = 0;
249 INIT_LIST_HEAD(&drive->list);
250 sema_init(&drive->gendev_rel_sem, 0);
251 }
252}
253
254static void init_hwif_default(ide_hwif_t *hwif, unsigned int index)
255{
256 hw_regs_t hw;
257
258 memset(&hw, 0, sizeof(hw_regs_t));
259
260 ide_init_hwif_ports(&hw, ide_default_io_base(index), 0, &hwif->irq);
261
262 memcpy(&hwif->hw, &hw, sizeof(hw));
263 memcpy(hwif->io_ports, hw.io_ports, sizeof(hw.io_ports));
264
265 hwif->noprobe = !hwif->io_ports[IDE_DATA_OFFSET];
266#ifdef CONFIG_BLK_DEV_HD
267 if (hwif->io_ports[IDE_DATA_OFFSET] == HD_DATA)
268 hwif->noprobe = 1; /* may be overridden by ide_setup() */
269#endif
270}
271
272extern void ide_arm_init(void);
273
274/*
275 * init_ide_data() sets reasonable default values into all fields
276 * of all instances of the hwifs and drives, but only on the first call.
277 * Subsequent calls have no effect (they don't wipe out anything).
278 *
279 * This routine is normally called at driver initialization time,
280 * but may also be called MUCH earlier during kernel "command-line"
281 * parameter processing. As such, we cannot depend on any other parts
282 * of the kernel (such as memory allocation) to be functioning yet.
283 *
284 * This is too bad, as otherwise we could dynamically allocate the
285 * ide_drive_t structs as needed, rather than always consuming memory
286 * for the max possible number (MAX_HWIFS * MAX_DRIVES) of them.
287 *
288 * FIXME: We should stuff the setup data into __init and copy the
289 * relevant hwifs/allocate them properly during boot.
290 */
291#define MAGIC_COOKIE 0x12345678
292static void __init init_ide_data (void)
293{
294 ide_hwif_t *hwif;
295 unsigned int index;
296 static unsigned long magic_cookie = MAGIC_COOKIE;
297
298 if (magic_cookie != MAGIC_COOKIE)
299 return; /* already initialized */
300 magic_cookie = 0;
301
302 /* Initialise all interface structures */
303 for (index = 0; index < MAX_HWIFS; ++index) {
304 hwif = &ide_hwifs[index];
305 init_hwif_data(hwif, index);
306 init_hwif_default(hwif, index);
307#if !defined(CONFIG_PPC32) || !defined(CONFIG_PCI)
308 hwif->irq = hwif->hw.irq =
309 ide_init_default_irq(hwif->io_ports[IDE_DATA_OFFSET]);
310#endif
311 }
312#ifdef CONFIG_IDE_ARM
313 initializing = 1;
314 ide_arm_init();
315 initializing = 0;
316#endif
317}
318
319/**
320 * ide_system_bus_speed - guess bus speed
321 *
322 * ide_system_bus_speed() returns what we think is the system VESA/PCI
323 * bus speed (in MHz). This is used for calculating interface PIO timings.
324 * The default is 40 for known PCI systems, 50 otherwise.
325 * The "idebus=xx" parameter can be used to override this value.
326 * The actual value to be used is computed/displayed the first time
327 * through. Drivers should only use this as a last resort.
328 *
329 * Returns a guessed speed in MHz.
330 */
331
332static int ide_system_bus_speed(void)
333{
334#ifdef CONFIG_PCI
335 static struct pci_device_id pci_default[] = {
336 { PCI_DEVICE(PCI_ANY_ID, PCI_ANY_ID) },
337 { }
338 };
339#else
340#define pci_default 0
341#endif /* CONFIG_PCI */
342
343 if (!system_bus_speed) {
344 if (idebus_parameter) {
345 /* user supplied value */
346 system_bus_speed = idebus_parameter;
347 } else if (pci_dev_present(pci_default)) {
348 /* safe default value for PCI */
349 system_bus_speed = 33;
350 } else {
351 /* safe default value for VESA and PCI */
352 system_bus_speed = 50;
353 }
354 printk(KERN_INFO "ide: Assuming %dMHz system bus speed "
355 "for PIO modes%s\n", system_bus_speed,
356 idebus_parameter ? "" : "; override with idebus=xx");
357 }
358 return system_bus_speed;
359}
360
361/*
362 * drives_lock protects the list of drives, drivers_lock the
363 * list of drivers. Currently nobody takes both at once.
364 */
365
366static DEFINE_SPINLOCK(drives_lock);
367static DEFINE_SPINLOCK(drivers_lock);
368static LIST_HEAD(drivers);
369
370/* Iterator for the driver list. */
371
372static void *m_start(struct seq_file *m, loff_t *pos)
373{
374 struct list_head *p;
375 loff_t l = *pos;
376 spin_lock(&drivers_lock);
377 list_for_each(p, &drivers)
378 if (!l--)
379 return list_entry(p, ide_driver_t, drivers);
380 return NULL;
381}
382
383static void *m_next(struct seq_file *m, void *v, loff_t *pos)
384{
385 struct list_head *p = ((ide_driver_t *)v)->drivers.next;
386 (*pos)++;
387 return p==&drivers ? NULL : list_entry(p, ide_driver_t, drivers);
388}
389
390static void m_stop(struct seq_file *m, void *v)
391{
392 spin_unlock(&drivers_lock);
393}
394
395static int show_driver(struct seq_file *m, void *v)
396{
397 ide_driver_t *driver = v;
398 seq_printf(m, "%s version %s\n", driver->name, driver->version);
399 return 0;
400}
401
402struct seq_operations ide_drivers_op = {
403 .start = m_start,
404 .next = m_next,
405 .stop = m_stop,
406 .show = show_driver
407};
408
409#ifdef CONFIG_PROC_FS
410struct proc_dir_entry *proc_ide_root;
411#endif
412
413static struct resource* hwif_request_region(ide_hwif_t *hwif,
414 unsigned long addr, int num)
415{
416 struct resource *res = request_region(addr, num, hwif->name);
417
418 if (!res)
419 printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n",
420 hwif->name, addr, addr+num-1);
421 return res;
422}
423
424/**
425 * ide_hwif_request_regions - request resources for IDE
426 * @hwif: interface to use
427 *
428 * Requests all the needed resources for an interface.
429 * Right now core IDE code does this work which is deeply wrong.
430 * MMIO leaves it to the controller driver,
431 * PIO will migrate this way over time.
432 */
433
434int ide_hwif_request_regions(ide_hwif_t *hwif)
435{
436 unsigned long addr;
437 unsigned int i;
438
439 if (hwif->mmio == 2)
440 return 0;
441 BUG_ON(hwif->mmio == 1);
442 addr = hwif->io_ports[IDE_CONTROL_OFFSET];
443 if (addr && !hwif_request_region(hwif, addr, 1))
444 goto control_region_busy;
445 hwif->straight8 = 0;
446 addr = hwif->io_ports[IDE_DATA_OFFSET];
447 if ((addr | 7) == hwif->io_ports[IDE_STATUS_OFFSET]) {
448 if (!hwif_request_region(hwif, addr, 8))
449 goto data_region_busy;
450 hwif->straight8 = 1;
451 return 0;
452 }
453 for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) {
454 addr = hwif->io_ports[i];
455 if (!hwif_request_region(hwif, addr, 1)) {
456 while (--i)
457 release_region(addr, 1);
458 goto data_region_busy;
459 }
460 }
461 return 0;
462
463data_region_busy:
464 addr = hwif->io_ports[IDE_CONTROL_OFFSET];
465 if (addr)
466 release_region(addr, 1);
467control_region_busy:
468 /* If any errors are return, we drop the hwif interface. */
469 return -EBUSY;
470}
471
472/**
473 * ide_hwif_release_regions - free IDE resources
474 *
475 * Note that we only release the standard ports,
476 * and do not even try to handle any extra ports
477 * allocated for weird IDE interface chipsets.
478 *
479 * Note also that we don't yet handle mmio resources here. More
480 * importantly our caller should be doing this so we need to
481 * restructure this as a helper function for drivers.
482 */
483
484void ide_hwif_release_regions(ide_hwif_t *hwif)
485{
486 u32 i = 0;
487
488 if (hwif->mmio == 2)
489 return;
490 if (hwif->io_ports[IDE_CONTROL_OFFSET])
491 release_region(hwif->io_ports[IDE_CONTROL_OFFSET], 1);
492 if (hwif->straight8) {
493 release_region(hwif->io_ports[IDE_DATA_OFFSET], 8);
494 return;
495 }
496 for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++)
497 if (hwif->io_ports[i])
498 release_region(hwif->io_ports[i], 1);
499}
500
501/**
502 * ide_hwif_restore - restore hwif to template
503 * @hwif: hwif to update
504 * @tmp_hwif: template
505 *
506 * Restore hwif to a previous state by copying most settngs
507 * from the template.
508 */
509
510static void ide_hwif_restore(ide_hwif_t *hwif, ide_hwif_t *tmp_hwif)
511{
512 hwif->hwgroup = tmp_hwif->hwgroup;
513
514 hwif->gendev.parent = tmp_hwif->gendev.parent;
515
516 hwif->proc = tmp_hwif->proc;
517
518 hwif->major = tmp_hwif->major;
519 hwif->straight8 = tmp_hwif->straight8;
520 hwif->bus_state = tmp_hwif->bus_state;
521
522 hwif->atapi_dma = tmp_hwif->atapi_dma;
523 hwif->ultra_mask = tmp_hwif->ultra_mask;
524 hwif->mwdma_mask = tmp_hwif->mwdma_mask;
525 hwif->swdma_mask = tmp_hwif->swdma_mask;
526
527 hwif->chipset = tmp_hwif->chipset;
528 hwif->hold = tmp_hwif->hold;
529
530#ifdef CONFIG_BLK_DEV_IDEPCI
531 hwif->pci_dev = tmp_hwif->pci_dev;
532 hwif->cds = tmp_hwif->cds;
533#endif
534
535 hwif->tuneproc = tmp_hwif->tuneproc;
536 hwif->speedproc = tmp_hwif->speedproc;
537 hwif->selectproc = tmp_hwif->selectproc;
538 hwif->reset_poll = tmp_hwif->reset_poll;
539 hwif->pre_reset = tmp_hwif->pre_reset;
540 hwif->resetproc = tmp_hwif->resetproc;
541 hwif->intrproc = tmp_hwif->intrproc;
542 hwif->maskproc = tmp_hwif->maskproc;
543 hwif->quirkproc = tmp_hwif->quirkproc;
544 hwif->busproc = tmp_hwif->busproc;
545
546 hwif->ata_input_data = tmp_hwif->ata_input_data;
547 hwif->ata_output_data = tmp_hwif->ata_output_data;
548 hwif->atapi_input_bytes = tmp_hwif->atapi_input_bytes;
549 hwif->atapi_output_bytes = tmp_hwif->atapi_output_bytes;
550
551 hwif->dma_setup = tmp_hwif->dma_setup;
552 hwif->dma_exec_cmd = tmp_hwif->dma_exec_cmd;
553 hwif->dma_start = tmp_hwif->dma_start;
554 hwif->ide_dma_end = tmp_hwif->ide_dma_end;
555 hwif->ide_dma_check = tmp_hwif->ide_dma_check;
556 hwif->ide_dma_on = tmp_hwif->ide_dma_on;
557 hwif->ide_dma_off_quietly = tmp_hwif->ide_dma_off_quietly;
558 hwif->ide_dma_test_irq = tmp_hwif->ide_dma_test_irq;
559 hwif->ide_dma_host_on = tmp_hwif->ide_dma_host_on;
560 hwif->ide_dma_host_off = tmp_hwif->ide_dma_host_off;
561 hwif->ide_dma_lostirq = tmp_hwif->ide_dma_lostirq;
562 hwif->ide_dma_timeout = tmp_hwif->ide_dma_timeout;
563
564 hwif->OUTB = tmp_hwif->OUTB;
565 hwif->OUTBSYNC = tmp_hwif->OUTBSYNC;
566 hwif->OUTW = tmp_hwif->OUTW;
567 hwif->OUTL = tmp_hwif->OUTL;
568 hwif->OUTSW = tmp_hwif->OUTSW;
569 hwif->OUTSL = tmp_hwif->OUTSL;
570
571 hwif->INB = tmp_hwif->INB;
572 hwif->INW = tmp_hwif->INW;
573 hwif->INL = tmp_hwif->INL;
574 hwif->INSW = tmp_hwif->INSW;
575 hwif->INSL = tmp_hwif->INSL;
576
577 hwif->sg_max_nents = tmp_hwif->sg_max_nents;
578
579 hwif->mmio = tmp_hwif->mmio;
580 hwif->rqsize = tmp_hwif->rqsize;
581 hwif->no_lba48 = tmp_hwif->no_lba48;
582
583#ifndef CONFIG_BLK_DEV_IDECS
584 hwif->irq = tmp_hwif->irq;
585#endif
586
587 hwif->dma_base = tmp_hwif->dma_base;
588 hwif->dma_master = tmp_hwif->dma_master;
589 hwif->dma_command = tmp_hwif->dma_command;
590 hwif->dma_vendor1 = tmp_hwif->dma_vendor1;
591 hwif->dma_status = tmp_hwif->dma_status;
592 hwif->dma_vendor3 = tmp_hwif->dma_vendor3;
593 hwif->dma_prdtable = tmp_hwif->dma_prdtable;
594
595 hwif->dma_extra = tmp_hwif->dma_extra;
596 hwif->config_data = tmp_hwif->config_data;
597 hwif->select_data = tmp_hwif->select_data;
598 hwif->autodma = tmp_hwif->autodma;
599 hwif->udma_four = tmp_hwif->udma_four;
600 hwif->no_dsc = tmp_hwif->no_dsc;
601
602 hwif->hwif_data = tmp_hwif->hwif_data;
603}
604
605/**
606 * ide_unregister - free an ide interface
607 * @index: index of interface (will change soon to a pointer)
608 *
609 * Perform the final unregister of an IDE interface. At the moment
610 * we don't refcount interfaces so this will also get split up.
611 *
612 * Locking:
613 * The caller must not hold the IDE locks
614 * The drive present/vanishing is not yet properly locked
615 * Take care with the callbacks. These have been split to avoid
616 * deadlocking the IDE layer. The shutdown callback is called
617 * before we take the lock and free resources. It is up to the
618 * caller to be sure there is no pending I/O here, and that
619 * the interfce will not be reopened (present/vanishing locking
620 * isnt yet done btw). After we commit to the final kill we
621 * call the cleanup callback with the ide locks held.
622 *
623 * Unregister restores the hwif structures to the default state.
624 * This is raving bonkers.
625 */
626
627void ide_unregister(unsigned int index)
628{
629 ide_drive_t *drive;
630 ide_hwif_t *hwif, *g;
631 static ide_hwif_t tmp_hwif; /* protected by ide_cfg_sem */
632 ide_hwgroup_t *hwgroup;
633 int irq_count = 0, unit, i;
634
635 BUG_ON(index >= MAX_HWIFS);
636
637 BUG_ON(in_interrupt());
638 BUG_ON(irqs_disabled());
639 down(&ide_cfg_sem);
640 spin_lock_irq(&ide_lock);
641 hwif = &ide_hwifs[index];
642 if (!hwif->present)
643 goto abort;
644 for (unit = 0; unit < MAX_DRIVES; ++unit) {
645 drive = &hwif->drives[unit];
646 if (!drive->present)
647 continue;
648 if (drive->usage || DRIVER(drive)->busy)
649 goto abort;
650 drive->dead = 1;
651 }
652 hwif->present = 0;
653
654 spin_unlock_irq(&ide_lock);
655
656 for (unit = 0; unit < MAX_DRIVES; ++unit) {
657 drive = &hwif->drives[unit];
658 if (!drive->present)
659 continue;
660 DRIVER(drive)->cleanup(drive);
661 }
662
663 destroy_proc_ide_interface(hwif);
664
665 hwgroup = hwif->hwgroup;
666 /*
667 * free the irq if we were the only hwif using it
668 */
669 g = hwgroup->hwif;
670 do {
671 if (g->irq == hwif->irq)
672 ++irq_count;
673 g = g->next;
674 } while (g != hwgroup->hwif);
675 if (irq_count == 1)
676 free_irq(hwif->irq, hwgroup);
677
678 spin_lock_irq(&ide_lock);
679 /*
680 * Note that we only release the standard ports,
681 * and do not even try to handle any extra ports
682 * allocated for weird IDE interface chipsets.
683 */
684 ide_hwif_release_regions(hwif);
685
686 /*
687 * Remove us from the hwgroup, and free
688 * the hwgroup if we were the only member
689 */
690 for (i = 0; i < MAX_DRIVES; ++i) {
691 drive = &hwif->drives[i];
692 if (drive->devfs_name[0] != '\0') {
693 devfs_remove(drive->devfs_name);
694 drive->devfs_name[0] = '\0';
695 }
696 if (!drive->present)
697 continue;
698 if (drive == drive->next) {
699 /* special case: last drive from hwgroup. */
700 BUG_ON(hwgroup->drive != drive);
701 hwgroup->drive = NULL;
702 } else {
703 ide_drive_t *walk;
704
705 walk = hwgroup->drive;
706 while (walk->next != drive)
707 walk = walk->next;
708 walk->next = drive->next;
709 if (hwgroup->drive == drive) {
710 hwgroup->drive = drive->next;
711 hwgroup->hwif = HWIF(hwgroup->drive);
712 }
713 }
714 BUG_ON(hwgroup->drive == drive);
715 if (drive->id != NULL) {
716 kfree(drive->id);
717 drive->id = NULL;
718 }
719 drive->present = 0;
720 /* Messed up locking ... */
721 spin_unlock_irq(&ide_lock);
722 blk_cleanup_queue(drive->queue);
723 device_unregister(&drive->gendev);
724 down(&drive->gendev_rel_sem);
725 spin_lock_irq(&ide_lock);
726 drive->queue = NULL;
727 }
728 if (hwif->next == hwif) {
729 BUG_ON(hwgroup->hwif != hwif);
730 kfree(hwgroup);
731 } else {
732 /* There is another interface in hwgroup.
733 * Unlink us, and set hwgroup->drive and ->hwif to
734 * something sane.
735 */
736 g = hwgroup->hwif;
737 while (g->next != hwif)
738 g = g->next;
739 g->next = hwif->next;
740 if (hwgroup->hwif == hwif) {
741 /* Chose a random hwif for hwgroup->hwif.
742 * It's guaranteed that there are no drives
743 * left in the hwgroup.
744 */
745 BUG_ON(hwgroup->drive != NULL);
746 hwgroup->hwif = g;
747 }
748 BUG_ON(hwgroup->hwif == hwif);
749 }
750
751 /* More messed up locking ... */
752 spin_unlock_irq(&ide_lock);
753 device_unregister(&hwif->gendev);
754 down(&hwif->gendev_rel_sem);
755
756 /*
757 * Remove us from the kernel's knowledge
758 */
759 blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS);
760 kfree(hwif->sg_table);
761 unregister_blkdev(hwif->major, hwif->name);
762 spin_lock_irq(&ide_lock);
763
764 if (hwif->dma_base) {
765 (void) ide_release_dma(hwif);
766
767 hwif->dma_base = 0;
768 hwif->dma_master = 0;
769 hwif->dma_command = 0;
770 hwif->dma_vendor1 = 0;
771 hwif->dma_status = 0;
772 hwif->dma_vendor3 = 0;
773 hwif->dma_prdtable = 0;
774 }
775
776 /* copy original settings */
777 tmp_hwif = *hwif;
778
779 /* restore hwif data to pristine status */
780 init_hwif_data(hwif, index);
781 init_hwif_default(hwif, index);
782
783 ide_hwif_restore(hwif, &tmp_hwif);
784
785abort:
786 spin_unlock_irq(&ide_lock);
787 up(&ide_cfg_sem);
788}
789
790EXPORT_SYMBOL(ide_unregister);
791
792
793/**
794 * ide_setup_ports - set up IDE interface ports
795 * @hw: register descriptions
796 * @base: base register
797 * @offsets: table of register offsets
798 * @ctrl: control register
799 * @ack_irq: IRQ ack
800 * @irq: interrupt lie
801 *
802 * Setup hw_regs_t structure described by parameters. You
803 * may set up the hw structure yourself OR use this routine to
804 * do it for you. This is basically a helper
805 *
806 */
807
808void ide_setup_ports ( hw_regs_t *hw,
809 unsigned long base, int *offsets,
810 unsigned long ctrl, unsigned long intr,
811 ide_ack_intr_t *ack_intr,
812/*
813 * ide_io_ops_t *iops,
814 */
815 int irq)
816{
817 int i;
818
819 for (i = 0; i < IDE_NR_PORTS; i++) {
820 if (offsets[i] == -1) {
821 switch(i) {
822 case IDE_CONTROL_OFFSET:
823 hw->io_ports[i] = ctrl;
824 break;
825#if defined(CONFIG_AMIGA) || defined(CONFIG_MAC)
826 case IDE_IRQ_OFFSET:
827 hw->io_ports[i] = intr;
828 break;
829#endif /* (CONFIG_AMIGA) || (CONFIG_MAC) */
830 default:
831 hw->io_ports[i] = 0;
832 break;
833 }
834 } else {
835 hw->io_ports[i] = base + offsets[i];
836 }
837 }
838 hw->irq = irq;
839 hw->dma = NO_DMA;
840 hw->ack_intr = ack_intr;
841/*
842 * hw->iops = iops;
843 */
844}
845
846/**
847 * ide_register_hw_with_fixup - register IDE interface
848 * @hw: hardware registers
849 * @hwifp: pointer to returned hwif
850 * @fixup: fixup function
851 *
852 * Register an IDE interface, specifying exactly the registers etc.
853 * Set init=1 iff calling before probes have taken place.
854 *
855 * Returns -1 on error.
856 */
857
858int ide_register_hw_with_fixup(hw_regs_t *hw, ide_hwif_t **hwifp, void(*fixup)(ide_hwif_t *hwif))
859{
860 int index, retry = 1;
861 ide_hwif_t *hwif;
862
863 do {
864 for (index = 0; index < MAX_HWIFS; ++index) {
865 hwif = &ide_hwifs[index];
866 if (hwif->hw.io_ports[IDE_DATA_OFFSET] == hw->io_ports[IDE_DATA_OFFSET])
867 goto found;
868 }
869 for (index = 0; index < MAX_HWIFS; ++index) {
870 hwif = &ide_hwifs[index];
871 if (hwif->hold)
872 continue;
873 if ((!hwif->present && !hwif->mate && !initializing) ||
874 (!hwif->hw.io_ports[IDE_DATA_OFFSET] && initializing))
875 goto found;
876 }
877 for (index = 0; index < MAX_HWIFS; index++)
878 ide_unregister(index);
879 } while (retry--);
880 return -1;
881found:
882 if (hwif->present)
883 ide_unregister(index);
884 else if (!hwif->hold) {
885 init_hwif_data(hwif, index);
886 init_hwif_default(hwif, index);
887 }
888 if (hwif->present)
889 return -1;
890 memcpy(&hwif->hw, hw, sizeof(*hw));
891 memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->hw.io_ports));
892 hwif->irq = hw->irq;
893 hwif->noprobe = 0;
894 hwif->chipset = hw->chipset;
895
896 if (!initializing) {
897 probe_hwif_init_with_fixup(hwif, fixup);
898 create_proc_ide_interfaces();
899 }
900
901 if (hwifp)
902 *hwifp = hwif;
903
904 return (initializing || hwif->present) ? index : -1;
905}
906
907EXPORT_SYMBOL(ide_register_hw_with_fixup);
908
909int ide_register_hw(hw_regs_t *hw, ide_hwif_t **hwifp)
910{
911 return ide_register_hw_with_fixup(hw, hwifp, NULL);
912}
913
914EXPORT_SYMBOL(ide_register_hw);
915
916/*
917 * Locks for IDE setting functionality
918 */
919
920DECLARE_MUTEX(ide_setting_sem);
921
922/**
923 * __ide_add_setting - add an ide setting option
924 * @drive: drive to use
925 * @name: setting name
926 * @rw: true if the function is read write
927 * @read_ioctl: function to call on read
928 * @write_ioctl: function to call on write
929 * @data_type: type of data
930 * @min: range minimum
931 * @max: range maximum
932 * @mul_factor: multiplication scale
933 * @div_factor: divison scale
934 * @data: private data field
935 * @set: setting
936 * @auto_remove: setting auto removal flag
937 *
938 * Removes the setting named from the device if it is present.
939 * The function takes the settings_lock to protect against
940 * parallel changes. This function must not be called from IRQ
941 * context. Returns 0 on success or -1 on failure.
942 *
943 * BUGS: This code is seriously over-engineered. There is also
944 * magic about how the driver specific features are setup. If
945 * a driver is attached we assume the driver settings are auto
946 * remove.
947 */
948
949static 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, int auto_remove)
950{
951 ide_settings_t **p = (ide_settings_t **) &drive->settings, *setting = NULL;
952
953 down(&ide_setting_sem);
954 while ((*p) && strcmp((*p)->name, name) < 0)
955 p = &((*p)->next);
956 if ((setting = kmalloc(sizeof(*setting), GFP_KERNEL)) == NULL)
957 goto abort;
958 memset(setting, 0, sizeof(*setting));
959 if ((setting->name = kmalloc(strlen(name) + 1, GFP_KERNEL)) == NULL)
960 goto abort;
961 strcpy(setting->name, name);
962 setting->rw = rw;
963 setting->read_ioctl = read_ioctl;
964 setting->write_ioctl = write_ioctl;
965 setting->data_type = data_type;
966 setting->min = min;
967 setting->max = max;
968 setting->mul_factor = mul_factor;
969 setting->div_factor = div_factor;
970 setting->data = data;
971 setting->set = set;
972
973 setting->next = *p;
974 if (auto_remove)
975 setting->auto_remove = 1;
976 *p = setting;
977 up(&ide_setting_sem);
978 return 0;
979abort:
980 up(&ide_setting_sem);
981 if (setting)
982 kfree(setting);
983 return -1;
984}
985
986int 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)
987{
988 return __ide_add_setting(drive, name, rw, read_ioctl, write_ioctl, data_type, min, max, mul_factor, div_factor, data, set, 1);
989}
990
991EXPORT_SYMBOL(ide_add_setting);
992
993/**
994 * __ide_remove_setting - remove an ide setting option
995 * @drive: drive to use
996 * @name: setting name
997 *
998 * Removes the setting named from the device if it is present.
999 * The caller must hold the setting semaphore.
1000 */
1001
1002static void __ide_remove_setting (ide_drive_t *drive, char *name)
1003{
1004 ide_settings_t **p, *setting;
1005
1006 p = (ide_settings_t **) &drive->settings;
1007
1008 while ((*p) && strcmp((*p)->name, name))
1009 p = &((*p)->next);
1010 if ((setting = (*p)) == NULL)
1011 return;
1012
1013 (*p) = setting->next;
1014
1015 kfree(setting->name);
1016 kfree(setting);
1017}
1018
1019/**
1020 * ide_find_setting_by_ioctl - find a drive specific ioctl
1021 * @drive: drive to scan
1022 * @cmd: ioctl command to handle
1023 *
1024 * Scan's the device setting table for a matching entry and returns
1025 * this or NULL if no entry is found. The caller must hold the
1026 * setting semaphore
1027 */
1028
1029static ide_settings_t *ide_find_setting_by_ioctl (ide_drive_t *drive, int cmd)
1030{
1031 ide_settings_t *setting = drive->settings;
1032
1033 while (setting) {
1034 if (setting->read_ioctl == cmd || setting->write_ioctl == cmd)
1035 break;
1036 setting = setting->next;
1037 }
1038
1039 return setting;
1040}
1041
1042/**
1043 * ide_find_setting_by_name - find a drive specific setting
1044 * @drive: drive to scan
1045 * @name: setting name
1046 *
1047 * Scan's the device setting table for a matching entry and returns
1048 * this or NULL if no entry is found. The caller must hold the
1049 * setting semaphore
1050 */
1051
1052ide_settings_t *ide_find_setting_by_name (ide_drive_t *drive, char *name)
1053{
1054 ide_settings_t *setting = drive->settings;
1055
1056 while (setting) {
1057 if (strcmp(setting->name, name) == 0)
1058 break;
1059 setting = setting->next;
1060 }
1061 return setting;
1062}
1063
1064/**
1065 * auto_remove_settings - remove driver specific settings
1066 * @drive: drive
1067 *
1068 * Automatically remove all the driver specific settings for this
1069 * drive. This function may sleep and must not be called from IRQ
1070 * context. The caller must hold ide_setting_sem.
1071 */
1072
1073static void auto_remove_settings (ide_drive_t *drive)
1074{
1075 ide_settings_t *setting;
1076repeat:
1077 setting = drive->settings;
1078 while (setting) {
1079 if (setting->auto_remove) {
1080 __ide_remove_setting(drive, setting->name);
1081 goto repeat;
1082 }
1083 setting = setting->next;
1084 }
1085}
1086
1087/**
1088 * ide_read_setting - read an IDE setting
1089 * @drive: drive to read from
1090 * @setting: drive setting
1091 *
1092 * Read a drive setting and return the value. The caller
1093 * must hold the ide_setting_sem when making this call.
1094 *
1095 * BUGS: the data return and error are the same return value
1096 * so an error -EINVAL and true return of the same value cannot
1097 * be told apart
1098 */
1099
1100int ide_read_setting (ide_drive_t *drive, ide_settings_t *setting)
1101{
1102 int val = -EINVAL;
1103 unsigned long flags;
1104
1105 if ((setting->rw & SETTING_READ)) {
1106 spin_lock_irqsave(&ide_lock, flags);
1107 switch(setting->data_type) {
1108 case TYPE_BYTE:
1109 val = *((u8 *) setting->data);
1110 break;
1111 case TYPE_SHORT:
1112 val = *((u16 *) setting->data);
1113 break;
1114 case TYPE_INT:
1115 case TYPE_INTA:
1116 val = *((u32 *) setting->data);
1117 break;
1118 }
1119 spin_unlock_irqrestore(&ide_lock, flags);
1120 }
1121 return val;
1122}
1123
1124/**
1125 * ide_spin_wait_hwgroup - wait for group
1126 * @drive: drive in the group
1127 *
1128 * Wait for an IDE device group to go non busy and then return
1129 * holding the ide_lock which guards the hwgroup->busy status
1130 * and right to use it.
1131 */
1132
1133int ide_spin_wait_hwgroup (ide_drive_t *drive)
1134{
1135 ide_hwgroup_t *hwgroup = HWGROUP(drive);
1136 unsigned long timeout = jiffies + (3 * HZ);
1137
1138 spin_lock_irq(&ide_lock);
1139
1140 while (hwgroup->busy) {
1141 unsigned long lflags;
1142 spin_unlock_irq(&ide_lock);
1143 local_irq_set(lflags);
1144 if (time_after(jiffies, timeout)) {
1145 local_irq_restore(lflags);
1146 printk(KERN_ERR "%s: channel busy\n", drive->name);
1147 return -EBUSY;
1148 }
1149 local_irq_restore(lflags);
1150 spin_lock_irq(&ide_lock);
1151 }
1152 return 0;
1153}
1154
1155EXPORT_SYMBOL(ide_spin_wait_hwgroup);
1156
1157/**
1158 * ide_write_setting - read an IDE setting
1159 * @drive: drive to read from
1160 * @setting: drive setting
1161 * @val: value
1162 *
1163 * Write a drive setting if it is possible. The caller
1164 * must hold the ide_setting_sem when making this call.
1165 *
1166 * BUGS: the data return and error are the same return value
1167 * so an error -EINVAL and true return of the same value cannot
1168 * be told apart
1169 *
1170 * FIXME: This should be changed to enqueue a special request
1171 * to the driver to change settings, and then wait on a sema for completion.
1172 * The current scheme of polling is kludgy, though safe enough.
1173 */
1174
1175int ide_write_setting (ide_drive_t *drive, ide_settings_t *setting, int val)
1176{
1177 int i;
1178 u32 *p;
1179
1180 if (!capable(CAP_SYS_ADMIN))
1181 return -EACCES;
1182 if (!(setting->rw & SETTING_WRITE))
1183 return -EPERM;
1184 if (val < setting->min || val > setting->max)
1185 return -EINVAL;
1186 if (setting->set)
1187 return setting->set(drive, val);
1188 if (ide_spin_wait_hwgroup(drive))
1189 return -EBUSY;
1190 switch (setting->data_type) {
1191 case TYPE_BYTE:
1192 *((u8 *) setting->data) = val;
1193 break;
1194 case TYPE_SHORT:
1195 *((u16 *) setting->data) = val;
1196 break;
1197 case TYPE_INT:
1198 *((u32 *) setting->data) = val;
1199 break;
1200 case TYPE_INTA:
1201 p = (u32 *) setting->data;
1202 for (i = 0; i < 1 << PARTN_BITS; i++, p++)
1203 *p = val;
1204 break;
1205 }
1206 spin_unlock_irq(&ide_lock);
1207 return 0;
1208}
1209
1210static int set_io_32bit(ide_drive_t *drive, int arg)
1211{
1212 drive->io_32bit = arg;
1213#ifdef CONFIG_BLK_DEV_DTC2278
1214 if (HWIF(drive)->chipset == ide_dtc2278)
1215 HWIF(drive)->drives[!drive->select.b.unit].io_32bit = arg;
1216#endif /* CONFIG_BLK_DEV_DTC2278 */
1217 return 0;
1218}
1219
1220static int set_using_dma (ide_drive_t *drive, int arg)
1221{
1222#ifdef CONFIG_BLK_DEV_IDEDMA
1223 if (!drive->id || !(drive->id->capability & 1))
1224 return -EPERM;
1225 if (HWIF(drive)->ide_dma_check == NULL)
1226 return -EPERM;
1227 if (arg) {
1228 if (HWIF(drive)->ide_dma_check(drive)) return -EIO;
1229 if (HWIF(drive)->ide_dma_on(drive)) return -EIO;
1230 } else {
1231 if (__ide_dma_off(drive))
1232 return -EIO;
1233 }
1234 return 0;
1235#else
1236 return -EPERM;
1237#endif
1238}
1239
1240static int set_pio_mode (ide_drive_t *drive, int arg)
1241{
1242 struct request rq;
1243
1244 if (!HWIF(drive)->tuneproc)
1245 return -ENOSYS;
1246 if (drive->special.b.set_tune)
1247 return -EBUSY;
1248 ide_init_drive_cmd(&rq);
1249 drive->tune_req = (u8) arg;
1250 drive->special.b.set_tune = 1;
1251 (void) ide_do_drive_cmd(drive, &rq, ide_wait);
1252 return 0;
1253}
1254
1255static int set_xfer_rate (ide_drive_t *drive, int arg)
1256{
1257 int err = ide_wait_cmd(drive,
1258 WIN_SETFEATURES, (u8) arg,
1259 SETFEATURES_XFER, 0, NULL);
1260
1261 if (!err && arg) {
1262 ide_set_xfer_rate(drive, (u8) arg);
1263 ide_driveid_update(drive);
1264 }
1265 return err;
1266}
1267
1268/**
1269 * ide_add_generic_settings - generic ide settings
1270 * @drive: drive being configured
1271 *
1272 * Add the generic parts of the system settings to the /proc files and
1273 * ioctls for this IDE device. The caller must not be holding the
1274 * ide_setting_sem.
1275 */
1276
1277void ide_add_generic_settings (ide_drive_t *drive)
1278{
1279/*
1280 * drive setting name read/write access read ioctl write ioctl data type min max mul_factor div_factor data pointer set function
1281 */
1282 __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, 0);
1283 __ide_add_setting(drive, "keepsettings", SETTING_RW, HDIO_GET_KEEPSETTINGS, HDIO_SET_KEEPSETTINGS, TYPE_BYTE, 0, 1, 1, 1, &drive->keep_settings, NULL, 0);
1284 __ide_add_setting(drive, "nice1", SETTING_RW, -1, -1, TYPE_BYTE, 0, 1, 1, 1, &drive->nice1, NULL, 0);
1285 __ide_add_setting(drive, "pio_mode", SETTING_WRITE, -1, HDIO_SET_PIO_MODE, TYPE_BYTE, 0, 255, 1, 1, NULL, set_pio_mode, 0);
1286 __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, 0);
1287 __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, 0);
1288 __ide_add_setting(drive, "init_speed", SETTING_RW, -1, -1, TYPE_BYTE, 0, 70, 1, 1, &drive->init_speed, NULL, 0);
1289 __ide_add_setting(drive, "current_speed", SETTING_RW, -1, -1, TYPE_BYTE, 0, 70, 1, 1, &drive->current_speed, set_xfer_rate, 0);
1290 __ide_add_setting(drive, "number", SETTING_RW, -1, -1, TYPE_BYTE, 0, 3, 1, 1, &drive->dn, NULL, 0);
1291}
1292
1293/**
1294 * system_bus_clock - clock guess
1295 *
1296 * External version of the bus clock guess used by very old IDE drivers
1297 * for things like VLB timings. Should not be used.
1298 */
1299
1300int system_bus_clock (void)
1301{
1302 return((int) ((!system_bus_speed) ? ide_system_bus_speed() : system_bus_speed ));
1303}
1304
1305EXPORT_SYMBOL(system_bus_clock);
1306
1307/*
1308 * Locking is badly broken here - since way back. That sucker is
1309 * root-only, but that's not an excuse... The real question is what
1310 * exclusion rules do we want here.
1311 */
1312int ide_replace_subdriver (ide_drive_t *drive, const char *driver)
1313{
1314 if (!drive->present || drive->usage || drive->dead)
1315 goto abort;
1316 if (DRIVER(drive)->cleanup(drive))
1317 goto abort;
1318 strlcpy(drive->driver_req, driver, sizeof(drive->driver_req));
1319 if (ata_attach(drive)) {
1320 spin_lock(&drives_lock);
1321 list_del_init(&drive->list);
1322 spin_unlock(&drives_lock);
1323 drive->driver_req[0] = 0;
1324 ata_attach(drive);
1325 } else {
1326 drive->driver_req[0] = 0;
1327 }
1328 if (drive->driver && !strcmp(drive->driver->name, driver))
1329 return 0;
1330abort:
1331 return 1;
1332}
1333
1334/**
1335 * ata_attach - attach an ATA/ATAPI device
1336 * @drive: drive to attach
1337 *
1338 * Takes a drive that is as yet not assigned to any midlayer IDE
1339 * driver (or is assigned to the default driver) and figures out
1340 * which driver would like to own it. If nobody claims the drive
1341 * then it is automatically attached to the default driver used for
1342 * unclaimed objects.
1343 *
1344 * A return of zero indicates attachment to a driver, of one
1345 * attachment to the default driver.
1346 *
1347 * Takes drivers_lock.
1348 */
1349
1350int ata_attach(ide_drive_t *drive)
1351{
1352 struct list_head *p;
1353 spin_lock(&drivers_lock);
1354 list_for_each(p, &drivers) {
1355 ide_driver_t *driver = list_entry(p, ide_driver_t, drivers);
1356 if (!try_module_get(driver->owner))
1357 continue;
1358 spin_unlock(&drivers_lock);
1359 if (driver->attach(drive) == 0) {
1360 module_put(driver->owner);
1361 drive->gendev.driver = &driver->gen_driver;
1362 return 0;
1363 }
1364 spin_lock(&drivers_lock);
1365 module_put(driver->owner);
1366 }
1367 drive->gendev.driver = NULL;
1368 spin_unlock(&drivers_lock);
1369 if (ide_register_subdriver(drive, NULL))
1370 panic("ide: default attach failed");
1371 return 1;
1372}
1373
1374static int generic_ide_suspend(struct device *dev, pm_message_t state)
1375{
1376 ide_drive_t *drive = dev->driver_data;
1377 struct request rq;
1378 struct request_pm_state rqpm;
1379 ide_task_t args;
1380
1381 memset(&rq, 0, sizeof(rq));
1382 memset(&rqpm, 0, sizeof(rqpm));
1383 memset(&args, 0, sizeof(args));
1384 rq.flags = REQ_PM_SUSPEND;
1385 rq.special = &args;
1386 rq.pm = &rqpm;
1387 rqpm.pm_step = ide_pm_state_start_suspend;
1388 rqpm.pm_state = state;
1389
1390 return ide_do_drive_cmd(drive, &rq, ide_wait);
1391}
1392
1393static int generic_ide_resume(struct device *dev)
1394{
1395 ide_drive_t *drive = dev->driver_data;
1396 struct request rq;
1397 struct request_pm_state rqpm;
1398 ide_task_t args;
1399
1400 memset(&rq, 0, sizeof(rq));
1401 memset(&rqpm, 0, sizeof(rqpm));
1402 memset(&args, 0, sizeof(args));
1403 rq.flags = REQ_PM_RESUME;
1404 rq.special = &args;
1405 rq.pm = &rqpm;
1406 rqpm.pm_step = ide_pm_state_start_resume;
1407 rqpm.pm_state = 0;
1408
1409 return ide_do_drive_cmd(drive, &rq, ide_head_wait);
1410}
1411
1412int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev,
1413 unsigned int cmd, unsigned long arg)
1414{
1415 ide_settings_t *setting;
1416 ide_driver_t *drv;
1417 int err = 0;
1418 void __user *p = (void __user *)arg;
1419
1420 down(&ide_setting_sem);
1421 if ((setting = ide_find_setting_by_ioctl(drive, cmd)) != NULL) {
1422 if (cmd == setting->read_ioctl) {
1423 err = ide_read_setting(drive, setting);
1424 up(&ide_setting_sem);
1425 return err >= 0 ? put_user(err, (long __user *)arg) : err;
1426 } else {
1427 if (bdev != bdev->bd_contains)
1428 err = -EINVAL;
1429 else
1430 err = ide_write_setting(drive, setting, arg);
1431 up(&ide_setting_sem);
1432 return err;
1433 }
1434 }
1435 up(&ide_setting_sem);
1436
1437 switch (cmd) {
1438 case HDIO_GETGEO:
1439 {
1440 struct hd_geometry geom;
1441 if (!p || (drive->media != ide_disk && drive->media != ide_floppy)) return -EINVAL;
1442 geom.heads = drive->bios_head;
1443 geom.sectors = drive->bios_sect;
1444 geom.cylinders = (u16)drive->bios_cyl; /* truncate */
1445 geom.start = get_start_sect(bdev);
1446 if (copy_to_user(p, &geom, sizeof(struct hd_geometry)))
1447 return -EFAULT;
1448 return 0;
1449 }
1450
1451 case HDIO_OBSOLETE_IDENTITY:
1452 case HDIO_GET_IDENTITY:
1453 if (bdev != bdev->bd_contains)
1454 return -EINVAL;
1455 if (drive->id_read == 0)
1456 return -ENOMSG;
1457 if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142))
1458 return -EFAULT;
1459 return 0;
1460
1461 case HDIO_GET_NICE:
1462 return put_user(drive->dsc_overlap << IDE_NICE_DSC_OVERLAP |
1463 drive->atapi_overlap << IDE_NICE_ATAPI_OVERLAP |
1464 drive->nice0 << IDE_NICE_0 |
1465 drive->nice1 << IDE_NICE_1 |
1466 drive->nice2 << IDE_NICE_2,
1467 (long __user *) arg);
1468
1469#ifdef CONFIG_IDE_TASK_IOCTL
1470 case HDIO_DRIVE_TASKFILE:
1471 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
1472 return -EACCES;
1473 switch(drive->media) {
1474 case ide_disk:
1475 return ide_taskfile_ioctl(drive, cmd, arg);
1476 default:
1477 return -ENOMSG;
1478 }
1479#endif /* CONFIG_IDE_TASK_IOCTL */
1480
1481 case HDIO_DRIVE_CMD:
1482 if (!capable(CAP_SYS_RAWIO))
1483 return -EACCES;
1484 return ide_cmd_ioctl(drive, cmd, arg);
1485
1486 case HDIO_DRIVE_TASK:
1487 if (!capable(CAP_SYS_RAWIO))
1488 return -EACCES;
1489 return ide_task_ioctl(drive, cmd, arg);
1490
1491 case HDIO_SCAN_HWIF:
1492 {
1493 hw_regs_t hw;
1494 int args[3];
1495 if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1496 if (copy_from_user(args, p, 3 * sizeof(int)))
1497 return -EFAULT;
1498 memset(&hw, 0, sizeof(hw));
1499 ide_init_hwif_ports(&hw, (unsigned long) args[0],
1500 (unsigned long) args[1], NULL);
1501 hw.irq = args[2];
1502 if (ide_register_hw(&hw, NULL) == -1)
1503 return -EIO;
1504 return 0;
1505 }
1506 case HDIO_UNREGISTER_HWIF:
1507 if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1508 /* (arg > MAX_HWIFS) checked in function */
1509 ide_unregister(arg);
1510 return 0;
1511 case HDIO_SET_NICE:
1512 if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1513 if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1))))
1514 return -EPERM;
1515 drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1;
1516 drv = *(ide_driver_t **)bdev->bd_disk->private_data;
1517 if (drive->dsc_overlap && !drv->supports_dsc_overlap) {
1518 drive->dsc_overlap = 0;
1519 return -EPERM;
1520 }
1521 drive->nice1 = (arg >> IDE_NICE_1) & 1;
1522 return 0;
1523 case HDIO_DRIVE_RESET:
1524 {
1525 unsigned long flags;
1526 if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1527
1528 /*
1529 * Abort the current command on the
1530 * group if there is one, taking
1531 * care not to allow anything else
1532 * to be queued and to die on the
1533 * spot if we miss one somehow
1534 */
1535
1536 spin_lock_irqsave(&ide_lock, flags);
1537
1538 ide_abort(drive, "drive reset");
1539
1540 if(HWGROUP(drive)->handler)
1541 BUG();
1542
1543 /* Ensure nothing gets queued after we
1544 drop the lock. Reset will clear the busy */
1545
1546 HWGROUP(drive)->busy = 1;
1547 spin_unlock_irqrestore(&ide_lock, flags);
1548 (void) ide_do_reset(drive);
1549
1550 return 0;
1551 }
1552
1553 case CDROMEJECT:
1554 case CDROMCLOSETRAY:
1555 return scsi_cmd_ioctl(file, bdev->bd_disk, cmd, p);
1556
1557 case HDIO_GET_BUSSTATE:
1558 if (!capable(CAP_SYS_ADMIN))
1559 return -EACCES;
1560 if (put_user(HWIF(drive)->bus_state, (long __user *)arg))
1561 return -EFAULT;
1562 return 0;
1563
1564 case HDIO_SET_BUSSTATE:
1565 if (!capable(CAP_SYS_ADMIN))
1566 return -EACCES;
1567 if (HWIF(drive)->busproc)
1568 return HWIF(drive)->busproc(drive, (int)arg);
1569 return -EOPNOTSUPP;
1570 default:
1571 return -EINVAL;
1572 }
1573}
1574
1575EXPORT_SYMBOL(generic_ide_ioctl);
1576
1577/*
1578 * stridx() returns the offset of c within s,
1579 * or -1 if c is '\0' or not found within s.
1580 */
1581static int __init stridx (const char *s, char c)
1582{
1583 char *i = strchr(s, c);
1584 return (i && c) ? i - s : -1;
1585}
1586
1587/*
1588 * match_parm() does parsing for ide_setup():
1589 *
1590 * 1. the first char of s must be '='.
1591 * 2. if the remainder matches one of the supplied keywords,
1592 * the index (1 based) of the keyword is negated and returned.
1593 * 3. if the remainder is a series of no more than max_vals numbers
1594 * separated by commas, the numbers are saved in vals[] and a
1595 * count of how many were saved is returned. Base10 is assumed,
1596 * and base16 is allowed when prefixed with "0x".
1597 * 4. otherwise, zero is returned.
1598 */
1599static int __init match_parm (char *s, const char *keywords[], int vals[], int max_vals)
1600{
1601 static const char *decimal = "0123456789";
1602 static const char *hex = "0123456789abcdef";
1603 int i, n;
1604
1605 if (*s++ == '=') {
1606 /*
1607 * Try matching against the supplied keywords,
1608 * and return -(index+1) if we match one
1609 */
1610 if (keywords != NULL) {
1611 for (i = 0; *keywords != NULL; ++i) {
1612 if (!strcmp(s, *keywords++))
1613 return -(i+1);
1614 }
1615 }
1616 /*
1617 * Look for a series of no more than "max_vals"
1618 * numeric values separated by commas, in base10,
1619 * or base16 when prefixed with "0x".
1620 * Return a count of how many were found.
1621 */
1622 for (n = 0; (i = stridx(decimal, *s)) >= 0;) {
1623 vals[n] = i;
1624 while ((i = stridx(decimal, *++s)) >= 0)
1625 vals[n] = (vals[n] * 10) + i;
1626 if (*s == 'x' && !vals[n]) {
1627 while ((i = stridx(hex, *++s)) >= 0)
1628 vals[n] = (vals[n] * 0x10) + i;
1629 }
1630 if (++n == max_vals)
1631 break;
1632 if (*s == ',' || *s == ';')
1633 ++s;
1634 }
1635 if (!*s)
1636 return n;
1637 }
1638 return 0; /* zero = nothing matched */
1639}
1640
1641#ifdef CONFIG_BLK_DEV_ALI14XX
1642static int __initdata probe_ali14xx;
1643extern int ali14xx_init(void);
1644#endif
1645#ifdef CONFIG_BLK_DEV_UMC8672
1646static int __initdata probe_umc8672;
1647extern int umc8672_init(void);
1648#endif
1649#ifdef CONFIG_BLK_DEV_DTC2278
1650static int __initdata probe_dtc2278;
1651extern int dtc2278_init(void);
1652#endif
1653#ifdef CONFIG_BLK_DEV_HT6560B
1654static int __initdata probe_ht6560b;
1655extern int ht6560b_init(void);
1656#endif
1657#ifdef CONFIG_BLK_DEV_QD65XX
1658static int __initdata probe_qd65xx;
1659extern int qd65xx_init(void);
1660#endif
1661
1662static int __initdata is_chipset_set[MAX_HWIFS];
1663
1664/*
1665 * ide_setup() gets called VERY EARLY during initialization,
1666 * to handle kernel "command line" strings beginning with "hdx=" or "ide".
1667 *
1668 * Remember to update Documentation/ide.txt if you change something here.
1669 */
1670static int __init ide_setup(char *s)
1671{
1672 int i, vals[3];
1673 ide_hwif_t *hwif;
1674 ide_drive_t *drive;
1675 unsigned int hw, unit;
1676 const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1);
1677 const char max_hwif = '0' + (MAX_HWIFS - 1);
1678
1679
1680 if (strncmp(s,"hd",2) == 0 && s[2] == '=') /* hd= is for hd.c */
1681 return 0; /* driver and not us */
1682
1683 if (strncmp(s,"ide",3) && strncmp(s,"idebus",6) && strncmp(s,"hd",2))
1684 return 0;
1685
1686 printk(KERN_INFO "ide_setup: %s", s);
1687 init_ide_data ();
1688
1689#ifdef CONFIG_BLK_DEV_IDEDOUBLER
1690 if (!strcmp(s, "ide=doubler")) {
1691 extern int ide_doubler;
1692
1693 printk(" : Enabled support for IDE doublers\n");
1694 ide_doubler = 1;
1695 return 1;
1696 }
1697#endif /* CONFIG_BLK_DEV_IDEDOUBLER */
1698
1699 if (!strcmp(s, "ide=nodma")) {
1700 printk(" : Prevented DMA\n");
1701 noautodma = 1;
1702 return 1;
1703 }
1704
1705#ifdef CONFIG_BLK_DEV_IDEPCI
1706 if (!strcmp(s, "ide=reverse")) {
1707 ide_scan_direction = 1;
1708 printk(" : Enabled support for IDE inverse scan order.\n");
1709 return 1;
1710 }
1711#endif /* CONFIG_BLK_DEV_IDEPCI */
1712
1713 /*
1714 * Look for drive options: "hdx="
1715 */
1716 if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) {
1717 const char *hd_words[] = {
1718 "none", "noprobe", "nowerr", "cdrom", "serialize",
1719 "autotune", "noautotune", "minus8", "swapdata", "bswap",
1720 "minus11", "remap", "remap63", "scsi", NULL };
1721 unit = s[2] - 'a';
1722 hw = unit / MAX_DRIVES;
1723 unit = unit % MAX_DRIVES;
1724 hwif = &ide_hwifs[hw];
1725 drive = &hwif->drives[unit];
1726 if (strncmp(s + 4, "ide-", 4) == 0) {
1727 strlcpy(drive->driver_req, s + 4, sizeof(drive->driver_req));
1728 goto done;
1729 }
1730 switch (match_parm(&s[3], hd_words, vals, 3)) {
1731 case -1: /* "none" */
1732 case -2: /* "noprobe" */
1733 drive->noprobe = 1;
1734 goto done;
1735 case -3: /* "nowerr" */
1736 drive->bad_wstat = BAD_R_STAT;
1737 hwif->noprobe = 0;
1738 goto done;
1739 case -4: /* "cdrom" */
1740 drive->present = 1;
1741 drive->media = ide_cdrom;
1742 /* an ATAPI device ignores DRDY */
1743 drive->ready_stat = 0;
1744 hwif->noprobe = 0;
1745 goto done;
1746 case -5: /* "serialize" */
1747 printk(" -- USE \"ide%d=serialize\" INSTEAD", hw);
1748 goto do_serialize;
1749 case -6: /* "autotune" */
1750 drive->autotune = IDE_TUNE_AUTO;
1751 goto obsolete_option;
1752 case -7: /* "noautotune" */
1753 drive->autotune = IDE_TUNE_NOAUTO;
1754 goto obsolete_option;
1755 case -9: /* "swapdata" */
1756 case -10: /* "bswap" */
1757 drive->bswap = 1;
1758 goto done;
1759 case -12: /* "remap" */
1760 drive->remap_0_to_1 = 1;
1761 goto done;
1762 case -13: /* "remap63" */
1763 drive->sect0 = 63;
1764 goto done;
1765 case -14: /* "scsi" */
1766 drive->scsi = 1;
1767 goto done;
1768 case 3: /* cyl,head,sect */
1769 drive->media = ide_disk;
1770 drive->ready_stat = READY_STAT;
1771 drive->cyl = drive->bios_cyl = vals[0];
1772 drive->head = drive->bios_head = vals[1];
1773 drive->sect = drive->bios_sect = vals[2];
1774 drive->present = 1;
1775 drive->forced_geom = 1;
1776 hwif->noprobe = 0;
1777 goto done;
1778 default:
1779 goto bad_option;
1780 }
1781 }
1782
1783 if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e')
1784 goto bad_option;
1785 /*
1786 * Look for bus speed option: "idebus="
1787 */
1788 if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') {
1789 if (match_parm(&s[6], NULL, vals, 1) != 1)
1790 goto bad_option;
1791 if (vals[0] >= 20 && vals[0] <= 66) {
1792 idebus_parameter = vals[0];
1793 } else
1794 printk(" -- BAD BUS SPEED! Expected value from 20 to 66");
1795 goto done;
1796 }
1797 /*
1798 * Look for interface options: "idex="
1799 */
1800 if (s[3] >= '0' && s[3] <= max_hwif) {
1801 /*
1802 * Be VERY CAREFUL changing this: note hardcoded indexes below
1803 * (-8, -9, -10) are reserved to ease the hardcoding.
1804 */
1805 static const char *ide_words[] = {
1806 "noprobe", "serialize", "autotune", "noautotune",
1807 "reset", "dma", "ata66", "minus8", "minus9",
1808 "minus10", "four", "qd65xx", "ht6560b", "cmd640_vlb",
1809 "dtc2278", "umc8672", "ali14xx", NULL };
1810 hw = s[3] - '0';
1811 hwif = &ide_hwifs[hw];
1812 i = match_parm(&s[4], ide_words, vals, 3);
1813
1814 /*
1815 * Cryptic check to ensure chipset not already set for hwif.
1816 * Note: we can't depend on hwif->chipset here.
1817 */
1818 if ((i >= -18 && i <= -11) || (i > 0 && i <= 3)) {
1819 /* chipset already specified */
1820 if (is_chipset_set[hw])
1821 goto bad_option;
1822 if (i > -18 && i <= -11) {
1823 /* these drivers are for "ide0=" only */
1824 if (hw != 0)
1825 goto bad_hwif;
1826 /* chipset already specified for 2nd port */
1827 if (is_chipset_set[hw+1])
1828 goto bad_option;
1829 }
1830 is_chipset_set[hw] = 1;
1831 printk("\n");
1832 }
1833
1834 switch (i) {
1835#ifdef CONFIG_BLK_DEV_ALI14XX
1836 case -17: /* "ali14xx" */
1837 probe_ali14xx = 1;
1838 goto done;
1839#endif
1840#ifdef CONFIG_BLK_DEV_UMC8672
1841 case -16: /* "umc8672" */
1842 probe_umc8672 = 1;
1843 goto done;
1844#endif
1845#ifdef CONFIG_BLK_DEV_DTC2278
1846 case -15: /* "dtc2278" */
1847 probe_dtc2278 = 1;
1848 goto done;
1849#endif
1850#ifdef CONFIG_BLK_DEV_CMD640
1851 case -14: /* "cmd640_vlb" */
1852 {
1853 extern int cmd640_vlb; /* flag for cmd640.c */
1854 cmd640_vlb = 1;
1855 goto done;
1856 }
1857#endif
1858#ifdef CONFIG_BLK_DEV_HT6560B
1859 case -13: /* "ht6560b" */
1860 probe_ht6560b = 1;
1861 goto done;
1862#endif
1863#ifdef CONFIG_BLK_DEV_QD65XX
1864 case -12: /* "qd65xx" */
1865 probe_qd65xx = 1;
1866 goto done;
1867#endif
1868#ifdef CONFIG_BLK_DEV_4DRIVES
1869 case -11: /* "four" drives on one set of ports */
1870 {
1871 ide_hwif_t *mate = &ide_hwifs[hw^1];
1872 mate->drives[0].select.all ^= 0x20;
1873 mate->drives[1].select.all ^= 0x20;
1874 hwif->chipset = mate->chipset = ide_4drives;
1875 mate->irq = hwif->irq;
1876 memcpy(mate->io_ports, hwif->io_ports, sizeof(hwif->io_ports));
1877 goto do_serialize;
1878 }
1879#endif /* CONFIG_BLK_DEV_4DRIVES */
1880 case -10: /* minus10 */
1881 case -9: /* minus9 */
1882 case -8: /* minus8 */
1883 goto bad_option;
1884 case -7: /* ata66 */
1885#ifdef CONFIG_BLK_DEV_IDEPCI
1886 hwif->udma_four = 1;
1887 goto obsolete_option;
1888#else
1889 goto bad_hwif;
1890#endif
1891 case -6: /* dma */
1892 hwif->autodma = 1;
1893 goto obsolete_option;
1894 case -5: /* "reset" */
1895 hwif->reset = 1;
1896 goto obsolete_option;
1897 case -4: /* "noautotune" */
1898 hwif->drives[0].autotune = IDE_TUNE_NOAUTO;
1899 hwif->drives[1].autotune = IDE_TUNE_NOAUTO;
1900 goto obsolete_option;
1901 case -3: /* "autotune" */
1902 hwif->drives[0].autotune = IDE_TUNE_AUTO;
1903 hwif->drives[1].autotune = IDE_TUNE_AUTO;
1904 goto obsolete_option;
1905 case -2: /* "serialize" */
1906 do_serialize:
1907 hwif->mate = &ide_hwifs[hw^1];
1908 hwif->mate->mate = hwif;
1909 hwif->serialized = hwif->mate->serialized = 1;
1910 goto obsolete_option;
1911
1912 case -1: /* "noprobe" */
1913 hwif->noprobe = 1;
1914 goto done;
1915
1916 case 1: /* base */
1917 vals[1] = vals[0] + 0x206; /* default ctl */
1918 case 2: /* base,ctl */
1919 vals[2] = 0; /* default irq = probe for it */
1920 case 3: /* base,ctl,irq */
1921 hwif->hw.irq = vals[2];
1922 ide_init_hwif_ports(&hwif->hw, (unsigned long) vals[0], (unsigned long) vals[1], &hwif->irq);
1923 memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->io_ports));
1924 hwif->irq = vals[2];
1925 hwif->noprobe = 0;
1926 hwif->chipset = ide_forced;
1927 goto obsolete_option;
1928
1929 case 0: goto bad_option;
1930 default:
1931 printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n");
1932 return 1;
1933 }
1934 }
1935bad_option:
1936 printk(" -- BAD OPTION\n");
1937 return 1;
1938obsolete_option:
1939 printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n");
1940 return 1;
1941bad_hwif:
1942 printk("-- NOT SUPPORTED ON ide%d", hw);
1943done:
1944 printk("\n");
1945 return 1;
1946}
1947
1948extern void pnpide_init(void);
1949extern void h8300_ide_init(void);
1950
1951/*
1952 * probe_for_hwifs() finds/initializes "known" IDE interfaces
1953 */
1954static void __init probe_for_hwifs (void)
1955{
1956#ifdef CONFIG_BLK_DEV_IDEPCI
1957 ide_scan_pcibus(ide_scan_direction);
1958#endif /* CONFIG_BLK_DEV_IDEPCI */
1959
1960#ifdef CONFIG_ETRAX_IDE
1961 {
1962 extern void init_e100_ide(void);
1963 init_e100_ide();
1964 }
1965#endif /* CONFIG_ETRAX_IDE */
1966#ifdef CONFIG_BLK_DEV_CMD640
1967 {
1968 extern void ide_probe_for_cmd640x(void);
1969 ide_probe_for_cmd640x();
1970 }
1971#endif /* CONFIG_BLK_DEV_CMD640 */
1972#ifdef CONFIG_BLK_DEV_IDE_PMAC
1973 {
1974 extern void pmac_ide_probe(void);
1975 pmac_ide_probe();
1976 }
1977#endif /* CONFIG_BLK_DEV_IDE_PMAC */
1978#ifdef CONFIG_BLK_DEV_GAYLE
1979 {
1980 extern void gayle_init(void);
1981 gayle_init();
1982 }
1983#endif /* CONFIG_BLK_DEV_GAYLE */
1984#ifdef CONFIG_BLK_DEV_FALCON_IDE
1985 {
1986 extern void falconide_init(void);
1987 falconide_init();
1988 }
1989#endif /* CONFIG_BLK_DEV_FALCON_IDE */
1990#ifdef CONFIG_BLK_DEV_MAC_IDE
1991 {
1992 extern void macide_init(void);
1993 macide_init();
1994 }
1995#endif /* CONFIG_BLK_DEV_MAC_IDE */
1996#ifdef CONFIG_BLK_DEV_Q40IDE
1997 {
1998 extern void q40ide_init(void);
1999 q40ide_init();
2000 }
2001#endif /* CONFIG_BLK_DEV_Q40IDE */
2002#ifdef CONFIG_BLK_DEV_BUDDHA
2003 {
2004 extern void buddha_init(void);
2005 buddha_init();
2006 }
2007#endif /* CONFIG_BLK_DEV_BUDDHA */
2008#ifdef CONFIG_BLK_DEV_IDEPNP
2009 pnpide_init();
2010#endif
2011#ifdef CONFIG_H8300
2012 h8300_ide_init();
2013#endif
2014}
2015
2016int ide_register_subdriver(ide_drive_t *drive, ide_driver_t *driver)
2017{
2018 unsigned long flags;
2019
2020 spin_lock_irqsave(&ide_lock, flags);
2021 if (!drive->present || drive->driver != NULL ||
2022 drive->usage || drive->dead) {
2023 spin_unlock_irqrestore(&ide_lock, flags);
2024 return 1;
2025 }
2026 drive->driver = driver;
2027 spin_unlock_irqrestore(&ide_lock, flags);
2028 spin_lock(&drives_lock);
2029 list_add_tail(&drive->list, driver ? &driver->drives : &ide_drives);
2030 spin_unlock(&drives_lock);
2031// printk(KERN_INFO "%s: attached %s driver.\n", drive->name, driver->name);
2032#ifdef CONFIG_PROC_FS
2033 if (driver)
2034 ide_add_proc_entries(drive->proc, driver->proc, drive);
2035#endif
2036 return 0;
2037}
2038
2039EXPORT_SYMBOL(ide_register_subdriver);
2040
2041/**
2042 * ide_unregister_subdriver - disconnect drive from driver
2043 * @drive: drive to unplug
2044 *
2045 * Disconnect a drive from the driver it was attached to and then
2046 * clean up the various proc files and other objects attached to it.
2047 *
2048 * Takes ide_setting_sem, ide_lock and drives_lock.
2049 * Caller must hold none of the locks.
2050 *
2051 * No locking versus subdriver unload because we are moving to the
2052 * default driver anyway. Wants double checking.
2053 */
2054
2055int ide_unregister_subdriver (ide_drive_t *drive)
2056{
2057 unsigned long flags;
2058
2059 down(&ide_setting_sem);
2060 spin_lock_irqsave(&ide_lock, flags);
2061 if (drive->usage || drive->driver == NULL || DRIVER(drive)->busy) {
2062 spin_unlock_irqrestore(&ide_lock, flags);
2063 up(&ide_setting_sem);
2064 return 1;
2065 }
2066#ifdef CONFIG_PROC_FS
2067 ide_remove_proc_entries(drive->proc, DRIVER(drive)->proc);
2068#endif
2069 auto_remove_settings(drive);
2070 drive->driver = NULL;
2071 spin_unlock_irqrestore(&ide_lock, flags);
2072 up(&ide_setting_sem);
2073 spin_lock(&drives_lock);
2074 list_del_init(&drive->list);
2075 spin_unlock(&drives_lock);
2076 /* drive will be added to &ide_drives in ata_attach() */
2077 return 0;
2078}
2079
2080EXPORT_SYMBOL(ide_unregister_subdriver);
2081
2082static int ide_drive_remove(struct device * dev)
2083{
2084 ide_drive_t * drive = container_of(dev,ide_drive_t,gendev);
2085 DRIVER(drive)->cleanup(drive);
2086 return 0;
2087}
2088
2089/**
2090 * ide_register_driver - register IDE device driver
2091 * @driver: the IDE device driver
2092 *
2093 * Register a new device driver and then scan the devices
2094 * on the IDE bus in case any should be attached to the
2095 * driver we have just registered. If so attach them.
2096 *
2097 * Takes drivers_lock and drives_lock.
2098 */
2099
2100int ide_register_driver(ide_driver_t *driver)
2101{
2102 struct list_head list;
2103 struct list_head *list_loop;
2104 struct list_head *tmp_storage;
2105
2106 spin_lock(&drivers_lock);
2107 list_add(&driver->drivers, &drivers);
2108 spin_unlock(&drivers_lock);
2109
2110 INIT_LIST_HEAD(&list);
2111 spin_lock(&drives_lock);
2112 list_splice_init(&ide_drives, &list);
2113 spin_unlock(&drives_lock);
2114
2115 list_for_each_safe(list_loop, tmp_storage, &list) {
2116 ide_drive_t *drive = container_of(list_loop, ide_drive_t, list);
2117 list_del_init(&drive->list);
2118 if (drive->present)
2119 ata_attach(drive);
2120 }
2121 driver->gen_driver.name = (char *) driver->name;
2122 driver->gen_driver.bus = &ide_bus_type;
2123 driver->gen_driver.remove = ide_drive_remove;
2124 return driver_register(&driver->gen_driver);
2125}
2126
2127EXPORT_SYMBOL(ide_register_driver);
2128
2129/**
2130 * ide_unregister_driver - unregister IDE device driver
2131 * @driver: the IDE device driver
2132 *
2133 * Called when a driver module is being unloaded. We reattach any
2134 * devices to whatever driver claims them next (typically the default
2135 * driver).
2136 *
2137 * Takes drivers_lock and called functions will take ide_setting_sem.
2138 */
2139
2140void ide_unregister_driver(ide_driver_t *driver)
2141{
2142 ide_drive_t *drive;
2143
2144 spin_lock(&drivers_lock);
2145 list_del(&driver->drivers);
2146 spin_unlock(&drivers_lock);
2147
2148 driver_unregister(&driver->gen_driver);
2149
2150 while(!list_empty(&driver->drives)) {
2151 drive = list_entry(driver->drives.next, ide_drive_t, list);
2152 if (driver->cleanup(drive)) {
2153 printk(KERN_ERR "%s: cleanup_module() called while still busy\n", drive->name);
2154 BUG();
2155 }
2156 ata_attach(drive);
2157 }
2158}
2159
2160EXPORT_SYMBOL(ide_unregister_driver);
2161
2162/*
2163 * Probe module
2164 */
2165
2166EXPORT_SYMBOL(ide_lock);
2167
2168struct bus_type ide_bus_type = {
2169 .name = "ide",
2170 .suspend = generic_ide_suspend,
2171 .resume = generic_ide_resume,
2172};
2173
2174/*
2175 * This is gets invoked once during initialization, to set *everything* up
2176 */
2177static int __init ide_init(void)
2178{
2179 printk(KERN_INFO "Uniform Multi-Platform E-IDE driver " REVISION "\n");
2180 devfs_mk_dir("ide");
2181 system_bus_speed = ide_system_bus_speed();
2182
2183 bus_register(&ide_bus_type);
2184
2185 init_ide_data();
2186
2187#ifdef CONFIG_PROC_FS
2188 proc_ide_root = proc_mkdir("ide", NULL);
2189#endif
2190
2191#ifdef CONFIG_BLK_DEV_ALI14XX
2192 if (probe_ali14xx)
2193 (void)ali14xx_init();
2194#endif
2195#ifdef CONFIG_BLK_DEV_UMC8672
2196 if (probe_umc8672)
2197 (void)umc8672_init();
2198#endif
2199#ifdef CONFIG_BLK_DEV_DTC2278
2200 if (probe_dtc2278)
2201 (void)dtc2278_init();
2202#endif
2203#ifdef CONFIG_BLK_DEV_HT6560B
2204 if (probe_ht6560b)
2205 (void)ht6560b_init();
2206#endif
2207#ifdef CONFIG_BLK_DEV_QD65XX
2208 if (probe_qd65xx)
2209 (void)qd65xx_init();
2210#endif
2211
2212 initializing = 1;
2213 /* Probe for special PCI and other "known" interface chipsets. */
2214 probe_for_hwifs();
2215 initializing = 0;
2216
2217#ifdef CONFIG_PROC_FS
2218 proc_ide_create();
2219#endif
2220 return 0;
2221}
2222
2223#ifdef MODULE
2224static char *options = NULL;
2225module_param(options, charp, 0);
2226MODULE_LICENSE("GPL");
2227
2228static void __init parse_options (char *line)
2229{
2230 char *next = line;
2231
2232 if (line == NULL || !*line)
2233 return;
2234 while ((line = next) != NULL) {
2235 if ((next = strchr(line,' ')) != NULL)
2236 *next++ = 0;
2237 if (!ide_setup(line))
2238 printk (KERN_INFO "Unknown option '%s'\n", line);
2239 }
2240}
2241
2242int init_module (void)
2243{
2244 parse_options(options);
2245 return ide_init();
2246}
2247
2248void cleanup_module (void)
2249{
2250 int index;
2251
2252 for (index = 0; index < MAX_HWIFS; ++index)
2253 ide_unregister(index);
2254
2255#ifdef CONFIG_PROC_FS
2256 proc_ide_destroy();
2257#endif
2258 devfs_remove("ide");
2259
2260 bus_unregister(&ide_bus_type);
2261}
2262
2263#else /* !MODULE */
2264
2265__setup("", ide_setup);
2266
2267module_init(ide_init);
2268
2269#endif /* MODULE */
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-30 07:54:48 -0500