2 * linux/drivers/ide/ide.c Version 7.00beta2 Mar 05 2003
4 * Copyright (C) 1994-1998 Linus Torvalds & authors (see below)
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>
12 * See linux/MAINTAINERS for address of current maintainer.
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
17 * There can be up to two drives per interface, as per the ATA-2 spec.
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
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!
31 * | modified by Drew Eckhardt to check nr of hd's from the CMOS.
33 * | Thanks to Branko Lankester, lankeste@fwi.uva.nl, who found a bug
34 * | in the early extended-partition checks and added DM partitions.
36 * | Early work on error handling by Mika Liljeberg (liljeber@cs.Helsinki.FI).
38 * | IRQ-unmask, drive-id, multiple-mode, support for ">16 heads",
39 * | and general streamlining by Mark Lord (mlord@pobox.com).
41 * October, 1994 -- Complete line-by-line overhaul for linux 1.1.x, by:
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)
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
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,
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
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
119 * Some additional driver compile-time options are in ./include/linux/ide.h
121 * To do, in likely order of completion:
122 * - modify kernel to obtain BIOS geometry for drives on 2nd/3rd/4th i/f
126 #define REVISION "Revision: 7.00alpha2"
127 #define VERSION "Id: ide.c 7.00a2 20020906"
129 #undef REALLY_SLOW_IO /* most systems can safely undef this */
131 #define _IDE_C /* Tell ide.h it's really us */
133 #include <linux/module.h>
134 #include <linux/types.h>
135 #include <linux/string.h>
136 #include <linux/kernel.h>
137 #include <linux/timer.h>
138 #include <linux/mm.h>
139 #include <linux/interrupt.h>
140 #include <linux/major.h>
141 #include <linux/errno.h>
142 #include <linux/genhd.h>
143 #include <linux/blkpg.h>
144 #include <linux/slab.h>
145 #include <linux/init.h>
146 #include <linux/pci.h>
147 #include <linux/delay.h>
148 #include <linux/ide.h>
149 #include <linux/completion.h>
150 #include <linux/reboot.h>
151 #include <linux/cdrom.h>
152 #include <linux/seq_file.h>
153 #include <linux/device.h>
154 #include <linux/bitops.h>
156 #include <asm/byteorder.h>
158 #include <asm/uaccess.h>
162 /* default maximum number of failures */
163 #define IDE_DEFAULT_MAX_FAILURES 1
165 static const u8 ide_hwif_to_major[] = { IDE0_MAJOR, IDE1_MAJOR,
166 IDE2_MAJOR, IDE3_MAJOR,
167 IDE4_MAJOR, IDE5_MAJOR,
168 IDE6_MAJOR, IDE7_MAJOR,
169 IDE8_MAJOR, IDE9_MAJOR };
171 static int idebus_parameter; /* holds the "idebus=" parameter */
172 static int system_bus_speed; /* holds what we think is VESA/PCI bus speed */
173 static int initializing; /* set while initializing built-in drivers */
175 DECLARE_MUTEX(ide_cfg_sem);
176 __cacheline_aligned_in_smp DEFINE_SPINLOCK(ide_lock);
178 #ifdef CONFIG_BLK_DEV_IDEPCI
179 static int ide_scan_direction; /* THIS was formerly 2.2.x pci=reverse */
182 #ifdef CONFIG_IDEDMA_AUTO
188 EXPORT_SYMBOL(noautodma);
190 #ifdef CONFIG_BLK_DEV_IDEACPI
192 int ide_noacpitfs = 1;
193 int ide_noacpionboot = 1;
197 * This is declared extern in ide.h, for access by other IDE modules:
199 ide_hwif_t ide_hwifs[MAX_HWIFS]; /* master data repository */
201 EXPORT_SYMBOL(ide_hwifs);
204 * Do not even *think* about calling this!
206 static void init_hwif_data(ide_hwif_t *hwif, unsigned int index)
210 /* bulk initialize hwif & drive info with zeros */
211 memset(hwif, 0, sizeof(ide_hwif_t));
213 /* fill in any non-zero initial values */
215 hwif->major = ide_hwif_to_major[index];
220 hwif->name[3] = '0' + index;
222 hwif->bus_state = BUSSTATE_ON;
224 hwif->atapi_dma = 0; /* disable all atapi dma */
225 hwif->ultra_mask = 0x80; /* disable all ultra */
226 hwif->mwdma_mask = 0x80; /* disable all mwdma */
227 hwif->swdma_mask = 0x80; /* disable all swdma */
229 init_completion(&hwif->gendev_rel_comp);
231 default_hwif_iops(hwif);
232 default_hwif_transport(hwif);
233 for (unit = 0; unit < MAX_DRIVES; ++unit) {
234 ide_drive_t *drive = &hwif->drives[unit];
236 drive->media = ide_disk;
237 drive->select.all = (unit<<4)|0xa0;
240 drive->ready_stat = READY_STAT;
241 drive->bad_wstat = BAD_W_STAT;
242 drive->special.b.recalibrate = 1;
243 drive->special.b.set_geometry = 1;
244 drive->name[0] = 'h';
245 drive->name[1] = 'd';
246 drive->name[2] = 'a' + (index * MAX_DRIVES) + unit;
247 drive->max_failures = IDE_DEFAULT_MAX_FAILURES;
248 drive->using_dma = 0;
250 INIT_LIST_HEAD(&drive->list);
251 init_completion(&drive->gendev_rel_comp);
255 static void init_hwif_default(ide_hwif_t *hwif, unsigned int index)
259 memset(&hw, 0, sizeof(hw_regs_t));
261 ide_init_hwif_ports(&hw, ide_default_io_base(index), 0, &hwif->irq);
263 memcpy(&hwif->hw, &hw, sizeof(hw));
264 memcpy(hwif->io_ports, hw.io_ports, sizeof(hw.io_ports));
266 hwif->noprobe = !hwif->io_ports[IDE_DATA_OFFSET];
267 #ifdef CONFIG_BLK_DEV_HD
268 if (hwif->io_ports[IDE_DATA_OFFSET] == HD_DATA)
269 hwif->noprobe = 1; /* may be overridden by ide_setup() */
273 extern void ide_arm_init(void);
276 * init_ide_data() sets reasonable default values into all fields
277 * of all instances of the hwifs and drives, but only on the first call.
278 * Subsequent calls have no effect (they don't wipe out anything).
280 * This routine is normally called at driver initialization time,
281 * but may also be called MUCH earlier during kernel "command-line"
282 * parameter processing. As such, we cannot depend on any other parts
283 * of the kernel (such as memory allocation) to be functioning yet.
285 * This is too bad, as otherwise we could dynamically allocate the
286 * ide_drive_t structs as needed, rather than always consuming memory
287 * for the max possible number (MAX_HWIFS * MAX_DRIVES) of them.
289 * FIXME: We should stuff the setup data into __init and copy the
290 * relevant hwifs/allocate them properly during boot.
292 #define MAGIC_COOKIE 0x12345678
293 static void __init init_ide_data (void)
297 static unsigned long magic_cookie = MAGIC_COOKIE;
299 if (magic_cookie != MAGIC_COOKIE)
300 return; /* already initialized */
303 /* Initialise all interface structures */
304 for (index = 0; index < MAX_HWIFS; ++index) {
305 hwif = &ide_hwifs[index];
306 init_hwif_data(hwif, index);
307 init_hwif_default(hwif, index);
308 #if !defined(CONFIG_PPC32) || !defined(CONFIG_PCI)
309 hwif->irq = hwif->hw.irq =
310 ide_init_default_irq(hwif->io_ports[IDE_DATA_OFFSET]);
313 #ifdef CONFIG_IDE_ARM
321 * ide_system_bus_speed - guess bus speed
323 * ide_system_bus_speed() returns what we think is the system VESA/PCI
324 * bus speed (in MHz). This is used for calculating interface PIO timings.
325 * The default is 40 for known PCI systems, 50 otherwise.
326 * The "idebus=xx" parameter can be used to override this value.
327 * The actual value to be used is computed/displayed the first time
328 * through. Drivers should only use this as a last resort.
330 * Returns a guessed speed in MHz.
333 static int ide_system_bus_speed(void)
336 static struct pci_device_id pci_default[] = {
337 { PCI_DEVICE(PCI_ANY_ID, PCI_ANY_ID) },
341 #define pci_default 0
342 #endif /* CONFIG_PCI */
344 if (!system_bus_speed) {
345 if (idebus_parameter) {
346 /* user supplied value */
347 system_bus_speed = idebus_parameter;
348 } else if (pci_dev_present(pci_default)) {
349 /* safe default value for PCI */
350 system_bus_speed = 33;
352 /* safe default value for VESA and PCI */
353 system_bus_speed = 50;
355 printk(KERN_INFO "ide: Assuming %dMHz system bus speed "
356 "for PIO modes%s\n", system_bus_speed,
357 idebus_parameter ? "" : "; override with idebus=xx");
359 return system_bus_speed;
362 #ifdef CONFIG_PROC_FS
363 struct proc_dir_entry *proc_ide_root;
366 static struct resource* hwif_request_region(ide_hwif_t *hwif,
367 unsigned long addr, int num)
369 struct resource *res = request_region(addr, num, hwif->name);
372 printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n",
373 hwif->name, addr, addr+num-1);
378 * ide_hwif_request_regions - request resources for IDE
379 * @hwif: interface to use
381 * Requests all the needed resources for an interface.
382 * Right now core IDE code does this work which is deeply wrong.
383 * MMIO leaves it to the controller driver,
384 * PIO will migrate this way over time.
387 int ide_hwif_request_regions(ide_hwif_t *hwif)
394 addr = hwif->io_ports[IDE_CONTROL_OFFSET];
395 if (addr && !hwif_request_region(hwif, addr, 1))
396 goto control_region_busy;
398 addr = hwif->io_ports[IDE_DATA_OFFSET];
399 if ((addr | 7) == hwif->io_ports[IDE_STATUS_OFFSET]) {
400 if (!hwif_request_region(hwif, addr, 8))
401 goto data_region_busy;
405 for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) {
406 addr = hwif->io_ports[i];
407 if (!hwif_request_region(hwif, addr, 1)) {
409 release_region(addr, 1);
410 goto data_region_busy;
416 addr = hwif->io_ports[IDE_CONTROL_OFFSET];
418 release_region(addr, 1);
420 /* If any errors are return, we drop the hwif interface. */
425 * ide_hwif_release_regions - free IDE resources
427 * Note that we only release the standard ports,
428 * and do not even try to handle any extra ports
429 * allocated for weird IDE interface chipsets.
431 * Note also that we don't yet handle mmio resources here. More
432 * importantly our caller should be doing this so we need to
433 * restructure this as a helper function for drivers.
436 void ide_hwif_release_regions(ide_hwif_t *hwif)
442 if (hwif->io_ports[IDE_CONTROL_OFFSET])
443 release_region(hwif->io_ports[IDE_CONTROL_OFFSET], 1);
444 if (hwif->straight8) {
445 release_region(hwif->io_ports[IDE_DATA_OFFSET], 8);
448 for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++)
449 if (hwif->io_ports[i])
450 release_region(hwif->io_ports[i], 1);
454 * ide_hwif_restore - restore hwif to template
455 * @hwif: hwif to update
456 * @tmp_hwif: template
458 * Restore hwif to a previous state by copying most settings
462 static void ide_hwif_restore(ide_hwif_t *hwif, ide_hwif_t *tmp_hwif)
464 hwif->hwgroup = tmp_hwif->hwgroup;
466 hwif->gendev.parent = tmp_hwif->gendev.parent;
468 hwif->proc = tmp_hwif->proc;
470 hwif->major = tmp_hwif->major;
471 hwif->straight8 = tmp_hwif->straight8;
472 hwif->bus_state = tmp_hwif->bus_state;
474 hwif->atapi_dma = tmp_hwif->atapi_dma;
475 hwif->ultra_mask = tmp_hwif->ultra_mask;
476 hwif->mwdma_mask = tmp_hwif->mwdma_mask;
477 hwif->swdma_mask = tmp_hwif->swdma_mask;
479 hwif->chipset = tmp_hwif->chipset;
480 hwif->hold = tmp_hwif->hold;
482 #ifdef CONFIG_BLK_DEV_IDEPCI
483 hwif->pci_dev = tmp_hwif->pci_dev;
484 hwif->cds = tmp_hwif->cds;
487 hwif->tuneproc = tmp_hwif->tuneproc;
488 hwif->speedproc = tmp_hwif->speedproc;
489 hwif->selectproc = tmp_hwif->selectproc;
490 hwif->reset_poll = tmp_hwif->reset_poll;
491 hwif->pre_reset = tmp_hwif->pre_reset;
492 hwif->resetproc = tmp_hwif->resetproc;
493 hwif->intrproc = tmp_hwif->intrproc;
494 hwif->maskproc = tmp_hwif->maskproc;
495 hwif->quirkproc = tmp_hwif->quirkproc;
496 hwif->busproc = tmp_hwif->busproc;
498 hwif->ata_input_data = tmp_hwif->ata_input_data;
499 hwif->ata_output_data = tmp_hwif->ata_output_data;
500 hwif->atapi_input_bytes = tmp_hwif->atapi_input_bytes;
501 hwif->atapi_output_bytes = tmp_hwif->atapi_output_bytes;
503 hwif->dma_setup = tmp_hwif->dma_setup;
504 hwif->dma_exec_cmd = tmp_hwif->dma_exec_cmd;
505 hwif->dma_start = tmp_hwif->dma_start;
506 hwif->ide_dma_end = tmp_hwif->ide_dma_end;
507 hwif->ide_dma_check = tmp_hwif->ide_dma_check;
508 hwif->ide_dma_on = tmp_hwif->ide_dma_on;
509 hwif->dma_off_quietly = tmp_hwif->dma_off_quietly;
510 hwif->ide_dma_test_irq = tmp_hwif->ide_dma_test_irq;
511 hwif->ide_dma_clear_irq = tmp_hwif->ide_dma_clear_irq;
512 hwif->dma_host_on = tmp_hwif->dma_host_on;
513 hwif->dma_host_off = tmp_hwif->dma_host_off;
514 hwif->ide_dma_lostirq = tmp_hwif->ide_dma_lostirq;
515 hwif->ide_dma_timeout = tmp_hwif->ide_dma_timeout;
517 hwif->OUTB = tmp_hwif->OUTB;
518 hwif->OUTBSYNC = tmp_hwif->OUTBSYNC;
519 hwif->OUTW = tmp_hwif->OUTW;
520 hwif->OUTSW = tmp_hwif->OUTSW;
521 hwif->OUTSL = tmp_hwif->OUTSL;
523 hwif->INB = tmp_hwif->INB;
524 hwif->INW = tmp_hwif->INW;
525 hwif->INSW = tmp_hwif->INSW;
526 hwif->INSL = tmp_hwif->INSL;
528 hwif->sg_max_nents = tmp_hwif->sg_max_nents;
530 hwif->mmio = tmp_hwif->mmio;
531 hwif->rqsize = tmp_hwif->rqsize;
532 hwif->no_lba48 = tmp_hwif->no_lba48;
534 #ifndef CONFIG_BLK_DEV_IDECS
535 hwif->irq = tmp_hwif->irq;
538 hwif->dma_base = tmp_hwif->dma_base;
539 hwif->dma_master = tmp_hwif->dma_master;
540 hwif->dma_command = tmp_hwif->dma_command;
541 hwif->dma_vendor1 = tmp_hwif->dma_vendor1;
542 hwif->dma_status = tmp_hwif->dma_status;
543 hwif->dma_vendor3 = tmp_hwif->dma_vendor3;
544 hwif->dma_prdtable = tmp_hwif->dma_prdtable;
546 hwif->config_data = tmp_hwif->config_data;
547 hwif->select_data = tmp_hwif->select_data;
548 hwif->extra_base = tmp_hwif->extra_base;
549 hwif->extra_ports = tmp_hwif->extra_ports;
550 hwif->autodma = tmp_hwif->autodma;
551 hwif->udma_four = tmp_hwif->udma_four;
553 hwif->hwif_data = tmp_hwif->hwif_data;
557 * ide_unregister - free an IDE interface
558 * @index: index of interface (will change soon to a pointer)
560 * Perform the final unregister of an IDE interface. At the moment
561 * we don't refcount interfaces so this will also get split up.
564 * The caller must not hold the IDE locks
565 * The drive present/vanishing is not yet properly locked
566 * Take care with the callbacks. These have been split to avoid
567 * deadlocking the IDE layer. The shutdown callback is called
568 * before we take the lock and free resources. It is up to the
569 * caller to be sure there is no pending I/O here, and that
570 * the interface will not be reopened (present/vanishing locking
571 * isn't yet done BTW). After we commit to the final kill we
572 * call the cleanup callback with the ide locks held.
574 * Unregister restores the hwif structures to the default state.
575 * This is raving bonkers.
578 void ide_unregister(unsigned int index)
581 ide_hwif_t *hwif, *g;
582 static ide_hwif_t tmp_hwif; /* protected by ide_cfg_sem */
583 ide_hwgroup_t *hwgroup;
584 int irq_count = 0, unit;
586 BUG_ON(index >= MAX_HWIFS);
588 BUG_ON(in_interrupt());
589 BUG_ON(irqs_disabled());
591 spin_lock_irq(&ide_lock);
592 hwif = &ide_hwifs[index];
595 for (unit = 0; unit < MAX_DRIVES; ++unit) {
596 drive = &hwif->drives[unit];
599 spin_unlock_irq(&ide_lock);
600 device_unregister(&drive->gendev);
601 wait_for_completion(&drive->gendev_rel_comp);
602 spin_lock_irq(&ide_lock);
606 spin_unlock_irq(&ide_lock);
608 destroy_proc_ide_interface(hwif);
610 hwgroup = hwif->hwgroup;
612 * free the irq if we were the only hwif using it
616 if (g->irq == hwif->irq)
619 } while (g != hwgroup->hwif);
621 free_irq(hwif->irq, hwgroup);
623 spin_lock_irq(&ide_lock);
625 * Note that we only release the standard ports,
626 * and do not even try to handle any extra ports
627 * allocated for weird IDE interface chipsets.
629 ide_hwif_release_regions(hwif);
632 * Remove us from the hwgroup, and free
633 * the hwgroup if we were the only member
635 if (hwif->next == hwif) {
636 BUG_ON(hwgroup->hwif != hwif);
639 /* There is another interface in hwgroup.
640 * Unlink us, and set hwgroup->drive and ->hwif to
644 while (g->next != hwif)
646 g->next = hwif->next;
647 if (hwgroup->hwif == hwif) {
648 /* Chose a random hwif for hwgroup->hwif.
649 * It's guaranteed that there are no drives
650 * left in the hwgroup.
652 BUG_ON(hwgroup->drive != NULL);
655 BUG_ON(hwgroup->hwif == hwif);
658 /* More messed up locking ... */
659 spin_unlock_irq(&ide_lock);
660 device_unregister(&hwif->gendev);
661 wait_for_completion(&hwif->gendev_rel_comp);
664 * Remove us from the kernel's knowledge
666 blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS);
667 kfree(hwif->sg_table);
668 unregister_blkdev(hwif->major, hwif->name);
669 spin_lock_irq(&ide_lock);
671 if (hwif->dma_base) {
672 (void) ide_release_dma(hwif);
675 hwif->dma_master = 0;
676 hwif->dma_command = 0;
677 hwif->dma_vendor1 = 0;
678 hwif->dma_status = 0;
679 hwif->dma_vendor3 = 0;
680 hwif->dma_prdtable = 0;
682 hwif->extra_base = 0;
683 hwif->extra_ports = 0;
686 /* copy original settings */
689 /* restore hwif data to pristine status */
690 init_hwif_data(hwif, index);
691 init_hwif_default(hwif, index);
693 ide_hwif_restore(hwif, &tmp_hwif);
696 spin_unlock_irq(&ide_lock);
700 EXPORT_SYMBOL(ide_unregister);
704 * ide_setup_ports - set up IDE interface ports
705 * @hw: register descriptions
706 * @base: base register
707 * @offsets: table of register offsets
708 * @ctrl: control register
710 * @irq: interrupt lie
712 * Setup hw_regs_t structure described by parameters. You
713 * may set up the hw structure yourself OR use this routine to
714 * do it for you. This is basically a helper
718 void ide_setup_ports ( hw_regs_t *hw,
719 unsigned long base, int *offsets,
720 unsigned long ctrl, unsigned long intr,
721 ide_ack_intr_t *ack_intr,
723 * ide_io_ops_t *iops,
729 memset(hw, 0, sizeof(hw_regs_t));
730 for (i = 0; i < IDE_NR_PORTS; i++) {
731 if (offsets[i] == -1) {
733 case IDE_CONTROL_OFFSET:
734 hw->io_ports[i] = ctrl;
736 #if defined(CONFIG_AMIGA) || defined(CONFIG_MAC)
738 hw->io_ports[i] = intr;
740 #endif /* (CONFIG_AMIGA) || (CONFIG_MAC) */
746 hw->io_ports[i] = base + offsets[i];
751 hw->ack_intr = ack_intr;
758 * ide_register_hw_with_fixup - register IDE interface
759 * @hw: hardware registers
760 * @hwifp: pointer to returned hwif
761 * @fixup: fixup function
763 * Register an IDE interface, specifying exactly the registers etc.
764 * Set init=1 iff calling before probes have taken place.
766 * Returns -1 on error.
769 int ide_register_hw_with_fixup(hw_regs_t *hw, ide_hwif_t **hwifp, void(*fixup)(ide_hwif_t *hwif))
771 int index, retry = 1;
775 for (index = 0; index < MAX_HWIFS; ++index) {
776 hwif = &ide_hwifs[index];
777 if (hwif->hw.io_ports[IDE_DATA_OFFSET] == hw->io_ports[IDE_DATA_OFFSET])
780 for (index = 0; index < MAX_HWIFS; ++index) {
781 hwif = &ide_hwifs[index];
784 if ((!hwif->present && !hwif->mate && !initializing) ||
785 (!hwif->hw.io_ports[IDE_DATA_OFFSET] && initializing))
788 for (index = 0; index < MAX_HWIFS; index++)
789 ide_unregister(index);
794 ide_unregister(index);
795 else if (!hwif->hold) {
796 init_hwif_data(hwif, index);
797 init_hwif_default(hwif, index);
801 memcpy(&hwif->hw, hw, sizeof(*hw));
802 memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->hw.io_ports));
805 hwif->chipset = hw->chipset;
806 hwif->gendev.parent = hw->dev;
809 probe_hwif_init_with_fixup(hwif, fixup);
810 create_proc_ide_interfaces();
816 return (initializing || hwif->present) ? index : -1;
819 EXPORT_SYMBOL(ide_register_hw_with_fixup);
821 int ide_register_hw(hw_regs_t *hw, ide_hwif_t **hwifp)
823 return ide_register_hw_with_fixup(hw, hwifp, NULL);
826 EXPORT_SYMBOL(ide_register_hw);
829 * Locks for IDE setting functionality
832 DECLARE_MUTEX(ide_setting_sem);
835 * __ide_add_setting - add an ide setting option
836 * @drive: drive to use
837 * @name: setting name
838 * @rw: true if the function is read write
839 * @read_ioctl: function to call on read
840 * @write_ioctl: function to call on write
841 * @data_type: type of data
842 * @min: range minimum
843 * @max: range maximum
844 * @mul_factor: multiplication scale
845 * @div_factor: divison scale
846 * @data: private data field
848 * @auto_remove: setting auto removal flag
850 * Removes the setting named from the device if it is present.
851 * The function takes the settings_lock to protect against
852 * parallel changes. This function must not be called from IRQ
853 * context. Returns 0 on success or -1 on failure.
855 * BUGS: This code is seriously over-engineered. There is also
856 * magic about how the driver specific features are setup. If
857 * a driver is attached we assume the driver settings are auto
861 static 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)
863 ide_settings_t **p = (ide_settings_t **) &drive->settings, *setting = NULL;
865 down(&ide_setting_sem);
866 while ((*p) && strcmp((*p)->name, name) < 0)
868 if ((setting = kzalloc(sizeof(*setting), GFP_KERNEL)) == NULL)
870 if ((setting->name = kmalloc(strlen(name) + 1, GFP_KERNEL)) == NULL)
872 strcpy(setting->name, name);
874 setting->read_ioctl = read_ioctl;
875 setting->write_ioctl = write_ioctl;
876 setting->data_type = data_type;
879 setting->mul_factor = mul_factor;
880 setting->div_factor = div_factor;
881 setting->data = data;
886 setting->auto_remove = 1;
888 up(&ide_setting_sem);
891 up(&ide_setting_sem);
896 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)
898 return __ide_add_setting(drive, name, rw, read_ioctl, write_ioctl, data_type, min, max, mul_factor, div_factor, data, set, 1);
901 EXPORT_SYMBOL(ide_add_setting);
904 * __ide_remove_setting - remove an ide setting option
905 * @drive: drive to use
906 * @name: setting name
908 * Removes the setting named from the device if it is present.
909 * The caller must hold the setting semaphore.
912 static void __ide_remove_setting (ide_drive_t *drive, char *name)
914 ide_settings_t **p, *setting;
916 p = (ide_settings_t **) &drive->settings;
918 while ((*p) && strcmp((*p)->name, name))
920 if ((setting = (*p)) == NULL)
923 (*p) = setting->next;
925 kfree(setting->name);
930 * ide_find_setting_by_ioctl - find a drive specific ioctl
931 * @drive: drive to scan
932 * @cmd: ioctl command to handle
934 * Scan's the device setting table for a matching entry and returns
935 * this or NULL if no entry is found. The caller must hold the
939 static ide_settings_t *ide_find_setting_by_ioctl (ide_drive_t *drive, int cmd)
941 ide_settings_t *setting = drive->settings;
944 if (setting->read_ioctl == cmd || setting->write_ioctl == cmd)
946 setting = setting->next;
953 * ide_find_setting_by_name - find a drive specific setting
954 * @drive: drive to scan
955 * @name: setting name
957 * Scan's the device setting table for a matching entry and returns
958 * this or NULL if no entry is found. The caller must hold the
962 ide_settings_t *ide_find_setting_by_name (ide_drive_t *drive, char *name)
964 ide_settings_t *setting = drive->settings;
967 if (strcmp(setting->name, name) == 0)
969 setting = setting->next;
975 * auto_remove_settings - remove driver specific settings
978 * Automatically remove all the driver specific settings for this
979 * drive. This function may not be called from IRQ context. The
980 * caller must hold ide_setting_sem.
983 static void auto_remove_settings (ide_drive_t *drive)
985 ide_settings_t *setting;
987 setting = drive->settings;
989 if (setting->auto_remove) {
990 __ide_remove_setting(drive, setting->name);
993 setting = setting->next;
998 * ide_read_setting - read an IDE setting
999 * @drive: drive to read from
1000 * @setting: drive setting
1002 * Read a drive setting and return the value. The caller
1003 * must hold the ide_setting_sem when making this call.
1005 * BUGS: the data return and error are the same return value
1006 * so an error -EINVAL and true return of the same value cannot
1010 int ide_read_setting (ide_drive_t *drive, ide_settings_t *setting)
1013 unsigned long flags;
1015 if ((setting->rw & SETTING_READ)) {
1016 spin_lock_irqsave(&ide_lock, flags);
1017 switch(setting->data_type) {
1019 val = *((u8 *) setting->data);
1022 val = *((u16 *) setting->data);
1026 val = *((u32 *) setting->data);
1029 spin_unlock_irqrestore(&ide_lock, flags);
1035 * ide_spin_wait_hwgroup - wait for group
1036 * @drive: drive in the group
1038 * Wait for an IDE device group to go non busy and then return
1039 * holding the ide_lock which guards the hwgroup->busy status
1040 * and right to use it.
1043 int ide_spin_wait_hwgroup (ide_drive_t *drive)
1045 ide_hwgroup_t *hwgroup = HWGROUP(drive);
1046 unsigned long timeout = jiffies + (3 * HZ);
1048 spin_lock_irq(&ide_lock);
1050 while (hwgroup->busy) {
1051 unsigned long lflags;
1052 spin_unlock_irq(&ide_lock);
1053 local_irq_set(lflags);
1054 if (time_after(jiffies, timeout)) {
1055 local_irq_restore(lflags);
1056 printk(KERN_ERR "%s: channel busy\n", drive->name);
1059 local_irq_restore(lflags);
1060 spin_lock_irq(&ide_lock);
1065 EXPORT_SYMBOL(ide_spin_wait_hwgroup);
1068 * ide_write_setting - read an IDE setting
1069 * @drive: drive to read from
1070 * @setting: drive setting
1073 * Write a drive setting if it is possible. The caller
1074 * must hold the ide_setting_sem when making this call.
1076 * BUGS: the data return and error are the same return value
1077 * so an error -EINVAL and true return of the same value cannot
1080 * FIXME: This should be changed to enqueue a special request
1081 * to the driver to change settings, and then wait on a sema for completion.
1082 * The current scheme of polling is kludgy, though safe enough.
1085 int ide_write_setting (ide_drive_t *drive, ide_settings_t *setting, int val)
1090 if (!capable(CAP_SYS_ADMIN))
1092 if (!(setting->rw & SETTING_WRITE))
1094 if (val < setting->min || val > setting->max)
1097 return setting->set(drive, val);
1098 if (ide_spin_wait_hwgroup(drive))
1100 switch (setting->data_type) {
1102 *((u8 *) setting->data) = val;
1105 *((u16 *) setting->data) = val;
1108 *((u32 *) setting->data) = val;
1111 p = (u32 *) setting->data;
1112 for (i = 0; i < 1 << PARTN_BITS; i++, p++)
1116 spin_unlock_irq(&ide_lock);
1120 static int set_io_32bit(ide_drive_t *drive, int arg)
1122 drive->io_32bit = arg;
1123 #ifdef CONFIG_BLK_DEV_DTC2278
1124 if (HWIF(drive)->chipset == ide_dtc2278)
1125 HWIF(drive)->drives[!drive->select.b.unit].io_32bit = arg;
1126 #endif /* CONFIG_BLK_DEV_DTC2278 */
1130 static int set_using_dma (ide_drive_t *drive, int arg)
1132 #ifdef CONFIG_BLK_DEV_IDEDMA
1133 if (!drive->id || !(drive->id->capability & 1))
1135 if (HWIF(drive)->ide_dma_check == NULL)
1138 if (ide_set_dma(drive))
1140 if (HWIF(drive)->ide_dma_on(drive)) return -EIO;
1149 static int set_pio_mode (ide_drive_t *drive, int arg)
1153 if (!HWIF(drive)->tuneproc)
1155 if (drive->special.b.set_tune)
1157 ide_init_drive_cmd(&rq);
1158 drive->tune_req = (u8) arg;
1159 drive->special.b.set_tune = 1;
1160 (void) ide_do_drive_cmd(drive, &rq, ide_wait);
1164 static int set_xfer_rate (ide_drive_t *drive, int arg)
1166 int err = ide_wait_cmd(drive,
1167 WIN_SETFEATURES, (u8) arg,
1168 SETFEATURES_XFER, 0, NULL);
1171 ide_set_xfer_rate(drive, (u8) arg);
1172 ide_driveid_update(drive);
1178 * ide_add_generic_settings - generic ide settings
1179 * @drive: drive being configured
1181 * Add the generic parts of the system settings to the /proc files and
1182 * ioctls for this IDE device. The caller must not be holding the
1186 void ide_add_generic_settings (ide_drive_t *drive)
1189 * drive setting name read/write access read ioctl write ioctl data type min max mul_factor div_factor data pointer set function
1191 __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);
1192 __ide_add_setting(drive, "keepsettings", SETTING_RW, HDIO_GET_KEEPSETTINGS, HDIO_SET_KEEPSETTINGS, TYPE_BYTE, 0, 1, 1, 1, &drive->keep_settings, NULL, 0);
1193 __ide_add_setting(drive, "nice1", SETTING_RW, -1, -1, TYPE_BYTE, 0, 1, 1, 1, &drive->nice1, NULL, 0);
1194 __ide_add_setting(drive, "pio_mode", SETTING_WRITE, -1, HDIO_SET_PIO_MODE, TYPE_BYTE, 0, 255, 1, 1, NULL, set_pio_mode, 0);
1195 __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);
1196 __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);
1197 __ide_add_setting(drive, "init_speed", SETTING_RW, -1, -1, TYPE_BYTE, 0, 70, 1, 1, &drive->init_speed, NULL, 0);
1198 __ide_add_setting(drive, "current_speed", SETTING_RW, -1, -1, TYPE_BYTE, 0, 70, 1, 1, &drive->current_speed, set_xfer_rate, 0);
1199 __ide_add_setting(drive, "number", SETTING_RW, -1, -1, TYPE_BYTE, 0, 3, 1, 1, &drive->dn, NULL, 0);
1203 * system_bus_clock - clock guess
1205 * External version of the bus clock guess used by very old IDE drivers
1206 * for things like VLB timings. Should not be used.
1209 int system_bus_clock (void)
1211 return((int) ((!system_bus_speed) ? ide_system_bus_speed() : system_bus_speed ));
1214 EXPORT_SYMBOL(system_bus_clock);
1216 static int generic_ide_suspend(struct device *dev, pm_message_t mesg)
1218 ide_drive_t *drive = dev->driver_data;
1219 ide_hwif_t *hwif = HWIF(drive);
1221 struct request_pm_state rqpm;
1224 /* Call ACPI _GTM only once */
1225 if (!(drive->dn % 2))
1226 ide_acpi_get_timing(hwif);
1228 memset(&rq, 0, sizeof(rq));
1229 memset(&rqpm, 0, sizeof(rqpm));
1230 memset(&args, 0, sizeof(args));
1231 rq.cmd_type = REQ_TYPE_PM_SUSPEND;
1234 rqpm.pm_step = ide_pm_state_start_suspend;
1235 if (mesg.event == PM_EVENT_PRETHAW)
1236 mesg.event = PM_EVENT_FREEZE;
1237 rqpm.pm_state = mesg.event;
1239 return ide_do_drive_cmd(drive, &rq, ide_wait);
1242 static int generic_ide_resume(struct device *dev)
1244 ide_drive_t *drive = dev->driver_data;
1245 ide_hwif_t *hwif = HWIF(drive);
1247 struct request_pm_state rqpm;
1250 /* Call ACPI _STM only once */
1251 if (!(drive->dn % 2))
1252 ide_acpi_push_timing(hwif);
1254 ide_acpi_exec_tfs(drive);
1256 memset(&rq, 0, sizeof(rq));
1257 memset(&rqpm, 0, sizeof(rqpm));
1258 memset(&args, 0, sizeof(args));
1259 rq.cmd_type = REQ_TYPE_PM_RESUME;
1262 rqpm.pm_step = ide_pm_state_start_resume;
1263 rqpm.pm_state = PM_EVENT_ON;
1265 return ide_do_drive_cmd(drive, &rq, ide_head_wait);
1268 int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev,
1269 unsigned int cmd, unsigned long arg)
1271 ide_settings_t *setting;
1274 void __user *p = (void __user *)arg;
1276 down(&ide_setting_sem);
1277 if ((setting = ide_find_setting_by_ioctl(drive, cmd)) != NULL) {
1278 if (cmd == setting->read_ioctl) {
1279 err = ide_read_setting(drive, setting);
1280 up(&ide_setting_sem);
1281 return err >= 0 ? put_user(err, (long __user *)arg) : err;
1283 if (bdev != bdev->bd_contains)
1286 err = ide_write_setting(drive, setting, arg);
1287 up(&ide_setting_sem);
1291 up(&ide_setting_sem);
1294 case HDIO_OBSOLETE_IDENTITY:
1295 case HDIO_GET_IDENTITY:
1296 if (bdev != bdev->bd_contains)
1298 if (drive->id_read == 0)
1300 if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142))
1305 return put_user(drive->dsc_overlap << IDE_NICE_DSC_OVERLAP |
1306 drive->atapi_overlap << IDE_NICE_ATAPI_OVERLAP |
1307 drive->nice0 << IDE_NICE_0 |
1308 drive->nice1 << IDE_NICE_1 |
1309 drive->nice2 << IDE_NICE_2,
1310 (long __user *) arg);
1312 #ifdef CONFIG_IDE_TASK_IOCTL
1313 case HDIO_DRIVE_TASKFILE:
1314 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
1316 switch(drive->media) {
1318 return ide_taskfile_ioctl(drive, cmd, arg);
1322 #endif /* CONFIG_IDE_TASK_IOCTL */
1324 case HDIO_DRIVE_CMD:
1325 if (!capable(CAP_SYS_RAWIO))
1327 return ide_cmd_ioctl(drive, cmd, arg);
1329 case HDIO_DRIVE_TASK:
1330 if (!capable(CAP_SYS_RAWIO))
1332 return ide_task_ioctl(drive, cmd, arg);
1334 case HDIO_SCAN_HWIF:
1338 if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1339 if (copy_from_user(args, p, 3 * sizeof(int)))
1341 memset(&hw, 0, sizeof(hw));
1342 ide_init_hwif_ports(&hw, (unsigned long) args[0],
1343 (unsigned long) args[1], NULL);
1345 if (ide_register_hw(&hw, NULL) == -1)
1349 case HDIO_UNREGISTER_HWIF:
1350 if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1351 /* (arg > MAX_HWIFS) checked in function */
1352 ide_unregister(arg);
1355 if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1356 if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1))))
1358 drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1;
1359 drv = *(ide_driver_t **)bdev->bd_disk->private_data;
1360 if (drive->dsc_overlap && !drv->supports_dsc_overlap) {
1361 drive->dsc_overlap = 0;
1364 drive->nice1 = (arg >> IDE_NICE_1) & 1;
1366 case HDIO_DRIVE_RESET:
1368 unsigned long flags;
1369 if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1372 * Abort the current command on the
1373 * group if there is one, taking
1374 * care not to allow anything else
1375 * to be queued and to die on the
1376 * spot if we miss one somehow
1379 spin_lock_irqsave(&ide_lock, flags);
1381 if (HWGROUP(drive)->resetting) {
1382 spin_unlock_irqrestore(&ide_lock, flags);
1386 ide_abort(drive, "drive reset");
1388 BUG_ON(HWGROUP(drive)->handler);
1390 /* Ensure nothing gets queued after we
1391 drop the lock. Reset will clear the busy */
1393 HWGROUP(drive)->busy = 1;
1394 spin_unlock_irqrestore(&ide_lock, flags);
1395 (void) ide_do_reset(drive);
1401 case CDROMCLOSETRAY:
1402 return scsi_cmd_ioctl(file, bdev->bd_disk, cmd, p);
1404 case HDIO_GET_BUSSTATE:
1405 if (!capable(CAP_SYS_ADMIN))
1407 if (put_user(HWIF(drive)->bus_state, (long __user *)arg))
1411 case HDIO_SET_BUSSTATE:
1412 if (!capable(CAP_SYS_ADMIN))
1414 if (HWIF(drive)->busproc)
1415 return HWIF(drive)->busproc(drive, (int)arg);
1422 EXPORT_SYMBOL(generic_ide_ioctl);
1425 * stridx() returns the offset of c within s,
1426 * or -1 if c is '\0' or not found within s.
1428 static int __init stridx (const char *s, char c)
1430 char *i = strchr(s, c);
1431 return (i && c) ? i - s : -1;
1435 * match_parm() does parsing for ide_setup():
1437 * 1. the first char of s must be '='.
1438 * 2. if the remainder matches one of the supplied keywords,
1439 * the index (1 based) of the keyword is negated and returned.
1440 * 3. if the remainder is a series of no more than max_vals numbers
1441 * separated by commas, the numbers are saved in vals[] and a
1442 * count of how many were saved is returned. Base10 is assumed,
1443 * and base16 is allowed when prefixed with "0x".
1444 * 4. otherwise, zero is returned.
1446 static int __init match_parm (char *s, const char *keywords[], int vals[], int max_vals)
1448 static const char *decimal = "0123456789";
1449 static const char *hex = "0123456789abcdef";
1454 * Try matching against the supplied keywords,
1455 * and return -(index+1) if we match one
1457 if (keywords != NULL) {
1458 for (i = 0; *keywords != NULL; ++i) {
1459 if (!strcmp(s, *keywords++))
1464 * Look for a series of no more than "max_vals"
1465 * numeric values separated by commas, in base10,
1466 * or base16 when prefixed with "0x".
1467 * Return a count of how many were found.
1469 for (n = 0; (i = stridx(decimal, *s)) >= 0;) {
1471 while ((i = stridx(decimal, *++s)) >= 0)
1472 vals[n] = (vals[n] * 10) + i;
1473 if (*s == 'x' && !vals[n]) {
1474 while ((i = stridx(hex, *++s)) >= 0)
1475 vals[n] = (vals[n] * 0x10) + i;
1477 if (++n == max_vals)
1479 if (*s == ',' || *s == ';')
1485 return 0; /* zero = nothing matched */
1488 #ifdef CONFIG_BLK_DEV_ALI14XX
1489 static int __initdata probe_ali14xx;
1490 extern int ali14xx_init(void);
1492 #ifdef CONFIG_BLK_DEV_UMC8672
1493 static int __initdata probe_umc8672;
1494 extern int umc8672_init(void);
1496 #ifdef CONFIG_BLK_DEV_DTC2278
1497 static int __initdata probe_dtc2278;
1498 extern int dtc2278_init(void);
1500 #ifdef CONFIG_BLK_DEV_HT6560B
1501 static int __initdata probe_ht6560b;
1502 extern int ht6560b_init(void);
1504 #ifdef CONFIG_BLK_DEV_QD65XX
1505 static int __initdata probe_qd65xx;
1506 extern int qd65xx_init(void);
1509 static int __initdata is_chipset_set[MAX_HWIFS];
1512 * ide_setup() gets called VERY EARLY during initialization,
1513 * to handle kernel "command line" strings beginning with "hdx=" or "ide".
1515 * Remember to update Documentation/ide.txt if you change something here.
1517 static int __init ide_setup(char *s)
1522 unsigned int hw, unit;
1523 const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1);
1524 const char max_hwif = '0' + (MAX_HWIFS - 1);
1527 if (strncmp(s,"hd",2) == 0 && s[2] == '=') /* hd= is for hd.c */
1528 return 0; /* driver and not us */
1530 if (strncmp(s,"ide",3) && strncmp(s,"idebus",6) && strncmp(s,"hd",2))
1533 printk(KERN_INFO "ide_setup: %s", s);
1536 #ifdef CONFIG_BLK_DEV_IDEDOUBLER
1537 if (!strcmp(s, "ide=doubler")) {
1538 extern int ide_doubler;
1540 printk(" : Enabled support for IDE doublers\n");
1544 #endif /* CONFIG_BLK_DEV_IDEDOUBLER */
1546 if (!strcmp(s, "ide=nodma")) {
1547 printk(" : Prevented DMA\n");
1552 #ifdef CONFIG_BLK_DEV_IDEPCI
1553 if (!strcmp(s, "ide=reverse")) {
1554 ide_scan_direction = 1;
1555 printk(" : Enabled support for IDE inverse scan order.\n");
1558 #endif /* CONFIG_BLK_DEV_IDEPCI */
1560 #ifdef CONFIG_BLK_DEV_IDEACPI
1561 if (!strcmp(s, "ide=noacpi")) {
1562 //printk(" : Disable IDE ACPI support.\n");
1566 if (!strcmp(s, "ide=acpigtf")) {
1567 //printk(" : Enable IDE ACPI _GTF support.\n");
1571 if (!strcmp(s, "ide=acpionboot")) {
1572 //printk(" : Call IDE ACPI methods on boot.\n");
1573 ide_noacpionboot = 0;
1576 #endif /* CONFIG_BLK_DEV_IDEACPI */
1579 * Look for drive options: "hdx="
1581 if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) {
1582 const char *hd_words[] = {
1583 "none", "noprobe", "nowerr", "cdrom", "serialize",
1584 "autotune", "noautotune", "minus8", "swapdata", "bswap",
1585 "noflush", "remap", "remap63", "scsi", NULL };
1587 hw = unit / MAX_DRIVES;
1588 unit = unit % MAX_DRIVES;
1589 hwif = &ide_hwifs[hw];
1590 drive = &hwif->drives[unit];
1591 if (strncmp(s + 4, "ide-", 4) == 0) {
1592 strlcpy(drive->driver_req, s + 4, sizeof(drive->driver_req));
1595 switch (match_parm(&s[3], hd_words, vals, 3)) {
1596 case -1: /* "none" */
1597 case -2: /* "noprobe" */
1600 case -3: /* "nowerr" */
1601 drive->bad_wstat = BAD_R_STAT;
1604 case -4: /* "cdrom" */
1606 drive->media = ide_cdrom;
1607 /* an ATAPI device ignores DRDY */
1608 drive->ready_stat = 0;
1611 case -5: /* "serialize" */
1612 printk(" -- USE \"ide%d=serialize\" INSTEAD", hw);
1614 case -6: /* "autotune" */
1615 drive->autotune = IDE_TUNE_AUTO;
1616 goto obsolete_option;
1617 case -7: /* "noautotune" */
1618 drive->autotune = IDE_TUNE_NOAUTO;
1619 goto obsolete_option;
1620 case -9: /* "swapdata" */
1621 case -10: /* "bswap" */
1624 case -11: /* noflush */
1627 case -12: /* "remap" */
1628 drive->remap_0_to_1 = 1;
1630 case -13: /* "remap63" */
1633 case -14: /* "scsi" */
1636 case 3: /* cyl,head,sect */
1637 drive->media = ide_disk;
1638 drive->ready_stat = READY_STAT;
1639 drive->cyl = drive->bios_cyl = vals[0];
1640 drive->head = drive->bios_head = vals[1];
1641 drive->sect = drive->bios_sect = vals[2];
1643 drive->forced_geom = 1;
1651 if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e')
1654 * Look for bus speed option: "idebus="
1656 if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') {
1657 if (match_parm(&s[6], NULL, vals, 1) != 1)
1659 if (vals[0] >= 20 && vals[0] <= 66) {
1660 idebus_parameter = vals[0];
1662 printk(" -- BAD BUS SPEED! Expected value from 20 to 66");
1666 * Look for interface options: "idex="
1668 if (s[3] >= '0' && s[3] <= max_hwif) {
1670 * Be VERY CAREFUL changing this: note hardcoded indexes below
1671 * (-8, -9, -10) are reserved to ease the hardcoding.
1673 static const char *ide_words[] = {
1674 "noprobe", "serialize", "autotune", "noautotune",
1675 "reset", "dma", "ata66", "minus8", "minus9",
1676 "minus10", "four", "qd65xx", "ht6560b", "cmd640_vlb",
1677 "dtc2278", "umc8672", "ali14xx", NULL };
1679 hwif = &ide_hwifs[hw];
1680 i = match_parm(&s[4], ide_words, vals, 3);
1683 * Cryptic check to ensure chipset not already set for hwif.
1684 * Note: we can't depend on hwif->chipset here.
1686 if ((i >= -18 && i <= -11) || (i > 0 && i <= 3)) {
1687 /* chipset already specified */
1688 if (is_chipset_set[hw])
1690 if (i > -18 && i <= -11) {
1691 /* these drivers are for "ide0=" only */
1694 /* chipset already specified for 2nd port */
1695 if (is_chipset_set[hw+1])
1698 is_chipset_set[hw] = 1;
1703 #ifdef CONFIG_BLK_DEV_ALI14XX
1704 case -17: /* "ali14xx" */
1708 #ifdef CONFIG_BLK_DEV_UMC8672
1709 case -16: /* "umc8672" */
1713 #ifdef CONFIG_BLK_DEV_DTC2278
1714 case -15: /* "dtc2278" */
1718 #ifdef CONFIG_BLK_DEV_CMD640
1719 case -14: /* "cmd640_vlb" */
1721 extern int cmd640_vlb; /* flag for cmd640.c */
1726 #ifdef CONFIG_BLK_DEV_HT6560B
1727 case -13: /* "ht6560b" */
1731 #ifdef CONFIG_BLK_DEV_QD65XX
1732 case -12: /* "qd65xx" */
1736 #ifdef CONFIG_BLK_DEV_4DRIVES
1737 case -11: /* "four" drives on one set of ports */
1739 ide_hwif_t *mate = &ide_hwifs[hw^1];
1740 mate->drives[0].select.all ^= 0x20;
1741 mate->drives[1].select.all ^= 0x20;
1742 hwif->chipset = mate->chipset = ide_4drives;
1743 mate->irq = hwif->irq;
1744 memcpy(mate->io_ports, hwif->io_ports, sizeof(hwif->io_ports));
1747 #endif /* CONFIG_BLK_DEV_4DRIVES */
1748 case -10: /* minus10 */
1749 case -9: /* minus9 */
1750 case -8: /* minus8 */
1752 case -7: /* ata66 */
1753 #ifdef CONFIG_BLK_DEV_IDEPCI
1754 hwif->udma_four = 1;
1755 goto obsolete_option;
1761 goto obsolete_option;
1762 case -5: /* "reset" */
1764 goto obsolete_option;
1765 case -4: /* "noautotune" */
1766 hwif->drives[0].autotune = IDE_TUNE_NOAUTO;
1767 hwif->drives[1].autotune = IDE_TUNE_NOAUTO;
1768 goto obsolete_option;
1769 case -3: /* "autotune" */
1770 hwif->drives[0].autotune = IDE_TUNE_AUTO;
1771 hwif->drives[1].autotune = IDE_TUNE_AUTO;
1772 goto obsolete_option;
1773 case -2: /* "serialize" */
1775 hwif->mate = &ide_hwifs[hw^1];
1776 hwif->mate->mate = hwif;
1777 hwif->serialized = hwif->mate->serialized = 1;
1778 goto obsolete_option;
1780 case -1: /* "noprobe" */
1785 vals[1] = vals[0] + 0x206; /* default ctl */
1786 case 2: /* base,ctl */
1787 vals[2] = 0; /* default irq = probe for it */
1788 case 3: /* base,ctl,irq */
1789 hwif->hw.irq = vals[2];
1790 ide_init_hwif_ports(&hwif->hw, (unsigned long) vals[0], (unsigned long) vals[1], &hwif->irq);
1791 memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->io_ports));
1792 hwif->irq = vals[2];
1794 hwif->chipset = ide_forced;
1795 goto obsolete_option;
1797 case 0: goto bad_option;
1799 printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n");
1804 printk(" -- BAD OPTION\n");
1807 printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n");
1810 printk("-- NOT SUPPORTED ON ide%d", hw);
1816 extern void __init pnpide_init(void);
1817 extern void __exit pnpide_exit(void);
1818 extern void __init h8300_ide_init(void);
1821 * probe_for_hwifs() finds/initializes "known" IDE interfaces
1823 static void __init probe_for_hwifs (void)
1825 #ifdef CONFIG_BLK_DEV_IDEPCI
1826 ide_scan_pcibus(ide_scan_direction);
1827 #endif /* CONFIG_BLK_DEV_IDEPCI */
1829 #ifdef CONFIG_ETRAX_IDE
1831 extern void init_e100_ide(void);
1834 #endif /* CONFIG_ETRAX_IDE */
1835 #ifdef CONFIG_BLK_DEV_CMD640
1837 extern void ide_probe_for_cmd640x(void);
1838 ide_probe_for_cmd640x();
1840 #endif /* CONFIG_BLK_DEV_CMD640 */
1841 #ifdef CONFIG_BLK_DEV_IDE_PMAC
1843 extern void pmac_ide_probe(void);
1846 #endif /* CONFIG_BLK_DEV_IDE_PMAC */
1847 #ifdef CONFIG_BLK_DEV_GAYLE
1849 extern void gayle_init(void);
1852 #endif /* CONFIG_BLK_DEV_GAYLE */
1853 #ifdef CONFIG_BLK_DEV_FALCON_IDE
1855 extern void falconide_init(void);
1858 #endif /* CONFIG_BLK_DEV_FALCON_IDE */
1859 #ifdef CONFIG_BLK_DEV_MAC_IDE
1861 extern void macide_init(void);
1864 #endif /* CONFIG_BLK_DEV_MAC_IDE */
1865 #ifdef CONFIG_BLK_DEV_Q40IDE
1867 extern void q40ide_init(void);
1870 #endif /* CONFIG_BLK_DEV_Q40IDE */
1871 #ifdef CONFIG_BLK_DEV_BUDDHA
1873 extern void buddha_init(void);
1876 #endif /* CONFIG_BLK_DEV_BUDDHA */
1877 #ifdef CONFIG_BLK_DEV_IDEPNP
1885 void ide_register_subdriver(ide_drive_t *drive, ide_driver_t *driver)
1887 #ifdef CONFIG_PROC_FS
1888 ide_add_proc_entries(drive->proc, driver->proc, drive);
1892 EXPORT_SYMBOL(ide_register_subdriver);
1895 * ide_unregister_subdriver - disconnect drive from driver
1896 * @drive: drive to unplug
1899 * Disconnect a drive from the driver it was attached to and then
1900 * clean up the various proc files and other objects attached to it.
1902 * Takes ide_setting_sem and ide_lock.
1903 * Caller must hold none of the locks.
1906 void ide_unregister_subdriver(ide_drive_t *drive, ide_driver_t *driver)
1908 unsigned long flags;
1910 #ifdef CONFIG_PROC_FS
1911 ide_remove_proc_entries(drive->proc, driver->proc);
1913 down(&ide_setting_sem);
1914 spin_lock_irqsave(&ide_lock, flags);
1916 * ide_setting_sem protects the settings list
1917 * ide_lock protects the use of settings
1919 * so we need to hold both, ide_settings_sem because we want to
1920 * modify the settings list, and ide_lock because we cannot take
1921 * a setting out that is being used.
1923 * OTOH both ide_{read,write}_setting are only ever used under
1926 auto_remove_settings(drive);
1927 spin_unlock_irqrestore(&ide_lock, flags);
1928 up(&ide_setting_sem);
1931 EXPORT_SYMBOL(ide_unregister_subdriver);
1937 EXPORT_SYMBOL(ide_lock);
1939 static int ide_bus_match(struct device *dev, struct device_driver *drv)
1944 static char *media_string(ide_drive_t *drive)
1946 switch (drive->media) {
1960 static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf)
1962 ide_drive_t *drive = to_ide_device(dev);
1963 return sprintf(buf, "%s\n", media_string(drive));
1966 static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf)
1968 ide_drive_t *drive = to_ide_device(dev);
1969 return sprintf(buf, "%s\n", drive->name);
1972 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1974 ide_drive_t *drive = to_ide_device(dev);
1975 return sprintf(buf, "ide:m-%s\n", media_string(drive));
1978 static struct device_attribute ide_dev_attrs[] = {
1980 __ATTR_RO(drivename),
1981 __ATTR_RO(modalias),
1985 static int ide_uevent(struct device *dev, char **envp, int num_envp,
1986 char *buffer, int buffer_size)
1988 ide_drive_t *drive = to_ide_device(dev);
1992 add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
1993 "MEDIA=%s", media_string(drive));
1994 add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
1995 "DRIVENAME=%s", drive->name);
1996 add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
1997 "MODALIAS=ide:m-%s", media_string(drive));
2002 static int generic_ide_probe(struct device *dev)
2004 ide_drive_t *drive = to_ide_device(dev);
2005 ide_driver_t *drv = to_ide_driver(dev->driver);
2007 return drv->probe ? drv->probe(drive) : -ENODEV;
2010 static int generic_ide_remove(struct device *dev)
2012 ide_drive_t *drive = to_ide_device(dev);
2013 ide_driver_t *drv = to_ide_driver(dev->driver);
2021 static void generic_ide_shutdown(struct device *dev)
2023 ide_drive_t *drive = to_ide_device(dev);
2024 ide_driver_t *drv = to_ide_driver(dev->driver);
2026 if (dev->driver && drv->shutdown)
2027 drv->shutdown(drive);
2030 struct bus_type ide_bus_type = {
2032 .match = ide_bus_match,
2033 .uevent = ide_uevent,
2034 .probe = generic_ide_probe,
2035 .remove = generic_ide_remove,
2036 .shutdown = generic_ide_shutdown,
2037 .dev_attrs = ide_dev_attrs,
2038 .suspend = generic_ide_suspend,
2039 .resume = generic_ide_resume,
2042 EXPORT_SYMBOL_GPL(ide_bus_type);
2045 * This is gets invoked once during initialization, to set *everything* up
2047 static int __init ide_init(void)
2051 printk(KERN_INFO "Uniform Multi-Platform E-IDE driver " REVISION "\n");
2052 system_bus_speed = ide_system_bus_speed();
2054 ret = bus_register(&ide_bus_type);
2056 printk(KERN_WARNING "IDE: bus_register error: %d\n", ret);
2062 #ifdef CONFIG_PROC_FS
2063 proc_ide_root = proc_mkdir("ide", NULL);
2066 #ifdef CONFIG_BLK_DEV_ALI14XX
2068 (void)ali14xx_init();
2070 #ifdef CONFIG_BLK_DEV_UMC8672
2072 (void)umc8672_init();
2074 #ifdef CONFIG_BLK_DEV_DTC2278
2076 (void)dtc2278_init();
2078 #ifdef CONFIG_BLK_DEV_HT6560B
2080 (void)ht6560b_init();
2082 #ifdef CONFIG_BLK_DEV_QD65XX
2084 (void)qd65xx_init();
2088 /* Probe for special PCI and other "known" interface chipsets. */
2092 #ifdef CONFIG_PROC_FS
2099 static char *options = NULL;
2100 module_param(options, charp, 0);
2101 MODULE_LICENSE("GPL");
2103 static void __init parse_options (char *line)
2107 if (line == NULL || !*line)
2109 while ((line = next) != NULL) {
2110 if ((next = strchr(line,' ')) != NULL)
2112 if (!ide_setup(line))
2113 printk (KERN_INFO "Unknown option '%s'\n", line);
2117 int __init init_module (void)
2119 parse_options(options);
2123 void __exit cleanup_module (void)
2127 for (index = 0; index < MAX_HWIFS; ++index)
2128 ide_unregister(index);
2130 #ifdef CONFIG_BLK_DEV_IDEPNP
2134 #ifdef CONFIG_PROC_FS
2138 bus_unregister(&ide_bus_type);
2143 __setup("", ide_setup);
2145 module_init(ide_init);