2 * Copyright (C) 1994-1998 Linus Torvalds & authors (see below)
3 * Copyrifht (C) 2003-2005, 2007 Bartlomiej Zolnierkiewicz
7 * Mostly written by Mark Lord <mlord@pobox.com>
8 * and Gadi Oxman <gadio@netvision.net.il>
9 * and Andre Hedrick <andre@linux-ide.org>
11 * See linux/MAINTAINERS for address of current maintainer.
13 * This is the multiple IDE interface driver, as evolved from hd.c.
14 * It supports up to MAX_HWIFS IDE interfaces, on one or more IRQs
16 * There can be up to two drives per interface, as per the ATA-2 spec.
22 * | It traverses the request-list, using interrupts to jump between functions.
23 * | As nearly all functions can be called within interrupts, we may not sleep.
24 * | Special care is recommended. Have Fun!
26 * | modified by Drew Eckhardt to check nr of hd's from the CMOS.
28 * | Thanks to Branko Lankester, lankeste@fwi.uva.nl, who found a bug
29 * | in the early extended-partition checks and added DM partitions.
31 * | Early work on error handling by Mika Liljeberg (liljeber@cs.Helsinki.FI).
33 * | IRQ-unmask, drive-id, multiple-mode, support for ">16 heads",
34 * | and general streamlining by Mark Lord (mlord@pobox.com).
36 * October, 1994 -- Complete line-by-line overhaul for linux 1.1.x, by:
38 * Mark Lord (mlord@pobox.com) (IDE Perf.Pkg)
39 * Delman Lee (delman@ieee.org) ("Mr. atdisk2")
40 * Scott Snyder (snyder@fnald0.fnal.gov) (ATAPI IDE cd-rom)
42 * This was a rewrite of just about everything from hd.c, though some original
43 * code is still sprinkled about. Think of it as a major evolution, with
44 * inspiration from lots of linux users, esp. hamish@zot.apana.org.au
47 #define _IDE_C /* Tell ide.h it's really us */
49 #include <linux/module.h>
50 #include <linux/types.h>
51 #include <linux/string.h>
52 #include <linux/kernel.h>
53 #include <linux/timer.h>
55 #include <linux/interrupt.h>
56 #include <linux/major.h>
57 #include <linux/errno.h>
58 #include <linux/genhd.h>
59 #include <linux/blkpg.h>
60 #include <linux/slab.h>
61 #include <linux/init.h>
62 #include <linux/pci.h>
63 #include <linux/delay.h>
64 #include <linux/ide.h>
65 #include <linux/completion.h>
66 #include <linux/reboot.h>
67 #include <linux/cdrom.h>
68 #include <linux/seq_file.h>
69 #include <linux/device.h>
70 #include <linux/bitops.h>
72 #include <asm/byteorder.h>
74 #include <asm/uaccess.h>
78 /* default maximum number of failures */
79 #define IDE_DEFAULT_MAX_FAILURES 1
81 struct class *ide_port_class;
83 static const u8 ide_hwif_to_major[] = { IDE0_MAJOR, IDE1_MAJOR,
84 IDE2_MAJOR, IDE3_MAJOR,
85 IDE4_MAJOR, IDE5_MAJOR,
86 IDE6_MAJOR, IDE7_MAJOR,
87 IDE8_MAJOR, IDE9_MAJOR };
89 static int idebus_parameter; /* holds the "idebus=" parameter */
90 static int system_bus_speed; /* holds what we think is VESA/PCI bus speed */
92 DEFINE_MUTEX(ide_cfg_mtx);
93 __cacheline_aligned_in_smp DEFINE_SPINLOCK(ide_lock);
97 #ifdef CONFIG_BLK_DEV_IDEACPI
99 int ide_noacpitfs = 1;
100 int ide_noacpionboot = 1;
104 * This is declared extern in ide.h, for access by other IDE modules:
106 ide_hwif_t ide_hwifs[MAX_HWIFS]; /* master data repository */
108 EXPORT_SYMBOL(ide_hwifs);
110 static void ide_port_init_devices_data(ide_hwif_t *);
113 * Do not even *think* about calling this!
115 void ide_init_port_data(ide_hwif_t *hwif, unsigned int index)
117 /* bulk initialize hwif & drive info with zeros */
118 memset(hwif, 0, sizeof(ide_hwif_t));
120 /* fill in any non-zero initial values */
122 hwif->major = ide_hwif_to_major[index];
127 hwif->name[3] = '0' + index;
129 hwif->bus_state = BUSSTATE_ON;
131 init_completion(&hwif->gendev_rel_comp);
133 default_hwif_iops(hwif);
134 default_hwif_transport(hwif);
136 ide_port_init_devices_data(hwif);
138 EXPORT_SYMBOL_GPL(ide_init_port_data);
140 static void ide_port_init_devices_data(ide_hwif_t *hwif)
144 for (unit = 0; unit < MAX_DRIVES; ++unit) {
145 ide_drive_t *drive = &hwif->drives[unit];
146 u8 j = (hwif->index * MAX_DRIVES) + unit;
148 memset(drive, 0, sizeof(*drive));
150 drive->media = ide_disk;
151 drive->select.all = (unit<<4)|0xa0;
154 drive->ready_stat = READY_STAT;
155 drive->bad_wstat = BAD_W_STAT;
156 drive->special.b.recalibrate = 1;
157 drive->special.b.set_geometry = 1;
158 drive->name[0] = 'h';
159 drive->name[1] = 'd';
160 drive->name[2] = 'a' + j;
161 drive->max_failures = IDE_DEFAULT_MAX_FAILURES;
163 INIT_LIST_HEAD(&drive->list);
164 init_completion(&drive->gendev_rel_comp);
168 #ifndef CONFIG_IDE_ARCH_OBSOLETE_DEFAULTS
169 # define ide_default_io_base(index) (0)
170 # define ide_init_default_irq(base) (0)
174 * init_ide_data() sets reasonable default values into all fields
175 * of all instances of the hwifs and drives, but only on the first call.
176 * Subsequent calls have no effect (they don't wipe out anything).
178 * This routine is normally called at driver initialization time,
179 * but may also be called MUCH earlier during kernel "command-line"
180 * parameter processing. As such, we cannot depend on any other parts
181 * of the kernel (such as memory allocation) to be functioning yet.
183 * This is too bad, as otherwise we could dynamically allocate the
184 * ide_drive_t structs as needed, rather than always consuming memory
185 * for the max possible number (MAX_HWIFS * MAX_DRIVES) of them.
187 * FIXME: We should stuff the setup data into __init and copy the
188 * relevant hwifs/allocate them properly during boot.
190 #define MAGIC_COOKIE 0x12345678
191 static void __init init_ide_data (void)
194 static unsigned long magic_cookie = MAGIC_COOKIE;
197 if (magic_cookie != MAGIC_COOKIE)
198 return; /* already initialized */
201 /* Initialise all interface structures */
202 for (index = 0; index < MAX_HWIFS; ++index) {
203 ide_hwif_t *hwif = &ide_hwifs[index];
204 unsigned long io_addr = ide_default_io_base(index);
205 unsigned long ctl_addr = io_addr + 0x206;
207 ide_init_port_data(hwif, index);
209 #ifdef CONFIG_IDE_ARCH_OBSOLETE_DEFAULTS
210 memset(&hw, 0, sizeof(hw));
211 ide_std_init_ports(&hw, io_addr, ctl_addr);
212 memcpy(hwif->io_ports, hw.io_ports, sizeof(hw.io_ports));
213 hwif->noprobe = !hwif->io_ports[IDE_DATA_OFFSET];
215 ide_init_default_irq(hwif->io_ports[IDE_DATA_OFFSET]);
221 * ide_system_bus_speed - guess bus speed
223 * ide_system_bus_speed() returns what we think is the system VESA/PCI
224 * bus speed (in MHz). This is used for calculating interface PIO timings.
225 * The default is 40 for known PCI systems, 50 otherwise.
226 * The "idebus=xx" parameter can be used to override this value.
227 * The actual value to be used is computed/displayed the first time
228 * through. Drivers should only use this as a last resort.
230 * Returns a guessed speed in MHz.
233 static int ide_system_bus_speed(void)
236 static struct pci_device_id pci_default[] = {
237 { PCI_DEVICE(PCI_ANY_ID, PCI_ANY_ID) },
241 #define pci_default 0
242 #endif /* CONFIG_PCI */
244 /* user supplied value */
245 if (idebus_parameter)
246 return idebus_parameter;
248 /* safe default value for PCI or VESA and PCI*/
249 return pci_dev_present(pci_default) ? 33 : 50;
252 ide_hwif_t * ide_find_port(unsigned long base)
257 for (i = 0; i < MAX_HWIFS; i++) {
258 hwif = &ide_hwifs[i];
259 if (hwif->io_ports[IDE_DATA_OFFSET] == base)
263 for (i = 0; i < MAX_HWIFS; i++) {
264 hwif = &ide_hwifs[i];
265 if (hwif->chipset == ide_unknown)
274 EXPORT_SYMBOL_GPL(ide_find_port);
276 static struct resource* hwif_request_region(ide_hwif_t *hwif,
277 unsigned long addr, int num)
279 struct resource *res = request_region(addr, num, hwif->name);
282 printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n",
283 hwif->name, addr, addr+num-1);
288 * ide_hwif_request_regions - request resources for IDE
289 * @hwif: interface to use
291 * Requests all the needed resources for an interface.
292 * Right now core IDE code does this work which is deeply wrong.
293 * MMIO leaves it to the controller driver,
294 * PIO will migrate this way over time.
297 int ide_hwif_request_regions(ide_hwif_t *hwif)
304 addr = hwif->io_ports[IDE_CONTROL_OFFSET];
305 if (addr && !hwif_request_region(hwif, addr, 1))
306 goto control_region_busy;
308 addr = hwif->io_ports[IDE_DATA_OFFSET];
309 if ((addr | 7) == hwif->io_ports[IDE_STATUS_OFFSET]) {
310 if (!hwif_request_region(hwif, addr, 8))
311 goto data_region_busy;
315 for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) {
316 addr = hwif->io_ports[i];
317 if (!hwif_request_region(hwif, addr, 1)) {
319 release_region(addr, 1);
320 goto data_region_busy;
326 addr = hwif->io_ports[IDE_CONTROL_OFFSET];
328 release_region(addr, 1);
330 /* If any errors are return, we drop the hwif interface. */
335 * ide_hwif_release_regions - free IDE resources
337 * Note that we only release the standard ports,
338 * and do not even try to handle any extra ports
339 * allocated for weird IDE interface chipsets.
341 * Note also that we don't yet handle mmio resources here. More
342 * importantly our caller should be doing this so we need to
343 * restructure this as a helper function for drivers.
346 void ide_hwif_release_regions(ide_hwif_t *hwif)
352 if (hwif->io_ports[IDE_CONTROL_OFFSET])
353 release_region(hwif->io_ports[IDE_CONTROL_OFFSET], 1);
354 if (hwif->straight8) {
355 release_region(hwif->io_ports[IDE_DATA_OFFSET], 8);
358 for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++)
359 if (hwif->io_ports[i])
360 release_region(hwif->io_ports[i], 1);
363 void ide_remove_port_from_hwgroup(ide_hwif_t *hwif)
365 ide_hwgroup_t *hwgroup = hwif->hwgroup;
367 spin_lock_irq(&ide_lock);
369 * Remove us from the hwgroup, and free
370 * the hwgroup if we were the only member
372 if (hwif->next == hwif) {
373 BUG_ON(hwgroup->hwif != hwif);
376 /* There is another interface in hwgroup.
377 * Unlink us, and set hwgroup->drive and ->hwif to
380 ide_hwif_t *g = hwgroup->hwif;
382 while (g->next != hwif)
384 g->next = hwif->next;
385 if (hwgroup->hwif == hwif) {
386 /* Chose a random hwif for hwgroup->hwif.
387 * It's guaranteed that there are no drives
388 * left in the hwgroup.
390 BUG_ON(hwgroup->drive != NULL);
393 BUG_ON(hwgroup->hwif == hwif);
395 spin_unlock_irq(&ide_lock);
398 /* Called with ide_lock held. */
399 static void __ide_port_unregister_devices(ide_hwif_t *hwif)
403 for (i = 0; i < MAX_DRIVES; i++) {
404 ide_drive_t *drive = &hwif->drives[i];
406 if (drive->present) {
407 spin_unlock_irq(&ide_lock);
408 device_unregister(&drive->gendev);
409 wait_for_completion(&drive->gendev_rel_comp);
410 spin_lock_irq(&ide_lock);
415 void ide_port_unregister_devices(ide_hwif_t *hwif)
417 mutex_lock(&ide_cfg_mtx);
418 spin_lock_irq(&ide_lock);
419 __ide_port_unregister_devices(hwif);
421 ide_port_init_devices_data(hwif);
422 spin_unlock_irq(&ide_lock);
423 mutex_unlock(&ide_cfg_mtx);
425 EXPORT_SYMBOL_GPL(ide_port_unregister_devices);
428 * ide_unregister - free an IDE interface
429 * @index: index of interface (will change soon to a pointer)
431 * Perform the final unregister of an IDE interface. At the moment
432 * we don't refcount interfaces so this will also get split up.
435 * The caller must not hold the IDE locks
436 * The drive present/vanishing is not yet properly locked
437 * Take care with the callbacks. These have been split to avoid
438 * deadlocking the IDE layer. The shutdown callback is called
439 * before we take the lock and free resources. It is up to the
440 * caller to be sure there is no pending I/O here, and that
441 * the interface will not be reopened (present/vanishing locking
442 * isn't yet done BTW). After we commit to the final kill we
443 * call the cleanup callback with the ide locks held.
445 * Unregister restores the hwif structures to the default state.
446 * This is raving bonkers.
449 void ide_unregister(unsigned int index)
451 ide_hwif_t *hwif, *g;
452 ide_hwgroup_t *hwgroup;
455 BUG_ON(index >= MAX_HWIFS);
457 BUG_ON(in_interrupt());
458 BUG_ON(irqs_disabled());
459 mutex_lock(&ide_cfg_mtx);
460 spin_lock_irq(&ide_lock);
461 hwif = &ide_hwifs[index];
464 __ide_port_unregister_devices(hwif);
467 spin_unlock_irq(&ide_lock);
469 ide_proc_unregister_port(hwif);
471 hwgroup = hwif->hwgroup;
473 * free the irq if we were the only hwif using it
477 if (g->irq == hwif->irq)
480 } while (g != hwgroup->hwif);
482 free_irq(hwif->irq, hwgroup);
484 ide_remove_port_from_hwgroup(hwif);
486 device_unregister(hwif->portdev);
487 device_unregister(&hwif->gendev);
488 wait_for_completion(&hwif->gendev_rel_comp);
491 * Remove us from the kernel's knowledge
493 blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS);
494 kfree(hwif->sg_table);
495 unregister_blkdev(hwif->major, hwif->name);
496 spin_lock_irq(&ide_lock);
499 (void)ide_release_dma(hwif);
501 ide_hwif_release_regions(hwif);
503 /* restore hwif data to pristine status */
504 ide_init_port_data(hwif, index);
507 spin_unlock_irq(&ide_lock);
508 mutex_unlock(&ide_cfg_mtx);
511 EXPORT_SYMBOL(ide_unregister);
513 void ide_init_port_hw(ide_hwif_t *hwif, hw_regs_t *hw)
515 memcpy(hwif->io_ports, hw->io_ports, sizeof(hwif->io_ports));
518 hwif->chipset = hw->chipset;
519 hwif->gendev.parent = hw->dev;
520 hwif->ack_intr = hw->ack_intr;
522 EXPORT_SYMBOL_GPL(ide_init_port_hw);
525 * Locks for IDE setting functionality
528 DEFINE_MUTEX(ide_setting_mtx);
530 EXPORT_SYMBOL_GPL(ide_setting_mtx);
533 * ide_spin_wait_hwgroup - wait for group
534 * @drive: drive in the group
536 * Wait for an IDE device group to go non busy and then return
537 * holding the ide_lock which guards the hwgroup->busy status
538 * and right to use it.
541 int ide_spin_wait_hwgroup (ide_drive_t *drive)
543 ide_hwgroup_t *hwgroup = HWGROUP(drive);
544 unsigned long timeout = jiffies + (3 * HZ);
546 spin_lock_irq(&ide_lock);
548 while (hwgroup->busy) {
549 unsigned long lflags;
550 spin_unlock_irq(&ide_lock);
551 local_irq_set(lflags);
552 if (time_after(jiffies, timeout)) {
553 local_irq_restore(lflags);
554 printk(KERN_ERR "%s: channel busy\n", drive->name);
557 local_irq_restore(lflags);
558 spin_lock_irq(&ide_lock);
563 EXPORT_SYMBOL(ide_spin_wait_hwgroup);
565 int set_io_32bit(ide_drive_t *drive, int arg)
567 if (drive->no_io_32bit)
570 if (arg < 0 || arg > 1 + (SUPPORT_VLB_SYNC << 1))
573 if (ide_spin_wait_hwgroup(drive))
576 drive->io_32bit = arg;
578 spin_unlock_irq(&ide_lock);
583 static int set_ksettings(ide_drive_t *drive, int arg)
585 if (arg < 0 || arg > 1)
588 if (ide_spin_wait_hwgroup(drive))
590 drive->keep_settings = arg;
591 spin_unlock_irq(&ide_lock);
596 int set_using_dma(ide_drive_t *drive, int arg)
598 #ifdef CONFIG_BLK_DEV_IDEDMA
599 ide_hwif_t *hwif = drive->hwif;
602 if (arg < 0 || arg > 1)
605 if (!drive->id || !(drive->id->capability & 1))
608 if (hwif->dma_host_set == NULL)
612 if (ide_spin_wait_hwgroup(drive))
615 * set ->busy flag, unlock and let it ride
617 hwif->hwgroup->busy = 1;
618 spin_unlock_irq(&ide_lock);
623 if (ide_set_dma(drive))
629 * lock, clear ->busy flag and unlock before leaving
631 spin_lock_irq(&ide_lock);
632 hwif->hwgroup->busy = 0;
633 spin_unlock_irq(&ide_lock);
637 if (arg < 0 || arg > 1)
644 int set_pio_mode(ide_drive_t *drive, int arg)
648 if (arg < 0 || arg > 255)
651 if (drive->hwif->set_pio_mode == NULL)
654 if (drive->special.b.set_tune)
657 ide_init_drive_cmd(&rq);
658 rq.cmd_type = REQ_TYPE_ATA_TASKFILE;
660 drive->tune_req = (u8) arg;
661 drive->special.b.set_tune = 1;
662 (void) ide_do_drive_cmd(drive, &rq, ide_wait);
666 static int set_unmaskirq(ide_drive_t *drive, int arg)
668 if (drive->no_unmask)
671 if (arg < 0 || arg > 1)
674 if (ide_spin_wait_hwgroup(drive))
677 spin_unlock_irq(&ide_lock);
683 * system_bus_clock - clock guess
685 * External version of the bus clock guess used by very old IDE drivers
686 * for things like VLB timings. Should not be used.
689 int system_bus_clock (void)
691 return system_bus_speed;
694 EXPORT_SYMBOL(system_bus_clock);
696 static int generic_ide_suspend(struct device *dev, pm_message_t mesg)
698 ide_drive_t *drive = dev->driver_data;
699 ide_hwif_t *hwif = HWIF(drive);
701 struct request_pm_state rqpm;
705 /* Call ACPI _GTM only once */
706 if (!(drive->dn % 2))
707 ide_acpi_get_timing(hwif);
709 memset(&rq, 0, sizeof(rq));
710 memset(&rqpm, 0, sizeof(rqpm));
711 memset(&args, 0, sizeof(args));
712 rq.cmd_type = REQ_TYPE_PM_SUSPEND;
715 rqpm.pm_step = ide_pm_state_start_suspend;
716 if (mesg.event == PM_EVENT_PRETHAW)
717 mesg.event = PM_EVENT_FREEZE;
718 rqpm.pm_state = mesg.event;
720 ret = ide_do_drive_cmd(drive, &rq, ide_wait);
721 /* only call ACPI _PS3 after both drivers are suspended */
722 if (!ret && (((drive->dn % 2) && hwif->drives[0].present
723 && hwif->drives[1].present)
724 || !hwif->drives[0].present
725 || !hwif->drives[1].present))
726 ide_acpi_set_state(hwif, 0);
730 static int generic_ide_resume(struct device *dev)
732 ide_drive_t *drive = dev->driver_data;
733 ide_hwif_t *hwif = HWIF(drive);
735 struct request_pm_state rqpm;
739 /* Call ACPI _STM only once */
740 if (!(drive->dn % 2)) {
741 ide_acpi_set_state(hwif, 1);
742 ide_acpi_push_timing(hwif);
745 ide_acpi_exec_tfs(drive);
747 memset(&rq, 0, sizeof(rq));
748 memset(&rqpm, 0, sizeof(rqpm));
749 memset(&args, 0, sizeof(args));
750 rq.cmd_type = REQ_TYPE_PM_RESUME;
753 rqpm.pm_step = ide_pm_state_start_resume;
754 rqpm.pm_state = PM_EVENT_ON;
756 err = ide_do_drive_cmd(drive, &rq, ide_head_wait);
758 if (err == 0 && dev->driver) {
759 ide_driver_t *drv = to_ide_driver(dev->driver);
768 int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev,
769 unsigned int cmd, unsigned long arg)
773 void __user *p = (void __user *)arg;
774 int err = 0, (*setfunc)(ide_drive_t *, int);
778 case HDIO_GET_32BIT: val = &drive->io_32bit; goto read_val;
779 case HDIO_GET_KEEPSETTINGS: val = &drive->keep_settings; goto read_val;
780 case HDIO_GET_UNMASKINTR: val = &drive->unmask; goto read_val;
781 case HDIO_GET_DMA: val = &drive->using_dma; goto read_val;
782 case HDIO_SET_32BIT: setfunc = set_io_32bit; goto set_val;
783 case HDIO_SET_KEEPSETTINGS: setfunc = set_ksettings; goto set_val;
784 case HDIO_SET_PIO_MODE: setfunc = set_pio_mode; goto set_val;
785 case HDIO_SET_UNMASKINTR: setfunc = set_unmaskirq; goto set_val;
786 case HDIO_SET_DMA: setfunc = set_using_dma; goto set_val;
790 case HDIO_OBSOLETE_IDENTITY:
791 case HDIO_GET_IDENTITY:
792 if (bdev != bdev->bd_contains)
794 if (drive->id_read == 0)
796 if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142))
801 return put_user(drive->dsc_overlap << IDE_NICE_DSC_OVERLAP |
802 drive->atapi_overlap << IDE_NICE_ATAPI_OVERLAP |
803 drive->nice1 << IDE_NICE_1,
804 (long __user *) arg);
805 #ifdef CONFIG_IDE_TASK_IOCTL
806 case HDIO_DRIVE_TASKFILE:
807 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
809 switch(drive->media) {
811 return ide_taskfile_ioctl(drive, cmd, arg);
815 #endif /* CONFIG_IDE_TASK_IOCTL */
818 if (!capable(CAP_SYS_RAWIO))
820 return ide_cmd_ioctl(drive, cmd, arg);
822 case HDIO_DRIVE_TASK:
823 if (!capable(CAP_SYS_RAWIO))
825 return ide_task_ioctl(drive, cmd, arg);
827 if (!capable(CAP_SYS_ADMIN)) return -EACCES;
828 if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1))))
830 drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1;
831 drv = *(ide_driver_t **)bdev->bd_disk->private_data;
832 if (drive->dsc_overlap && !drv->supports_dsc_overlap) {
833 drive->dsc_overlap = 0;
836 drive->nice1 = (arg >> IDE_NICE_1) & 1;
838 case HDIO_DRIVE_RESET:
839 if (!capable(CAP_SYS_ADMIN))
843 * Abort the current command on the
844 * group if there is one, taking
845 * care not to allow anything else
846 * to be queued and to die on the
847 * spot if we miss one somehow
850 spin_lock_irqsave(&ide_lock, flags);
852 if (HWGROUP(drive)->resetting) {
853 spin_unlock_irqrestore(&ide_lock, flags);
857 ide_abort(drive, "drive reset");
859 BUG_ON(HWGROUP(drive)->handler);
861 /* Ensure nothing gets queued after we
862 drop the lock. Reset will clear the busy */
864 HWGROUP(drive)->busy = 1;
865 spin_unlock_irqrestore(&ide_lock, flags);
866 (void) ide_do_reset(drive);
869 case HDIO_GET_BUSSTATE:
870 if (!capable(CAP_SYS_ADMIN))
872 if (put_user(HWIF(drive)->bus_state, (long __user *)arg))
876 case HDIO_SET_BUSSTATE:
877 if (!capable(CAP_SYS_ADMIN))
885 mutex_lock(&ide_setting_mtx);
886 spin_lock_irqsave(&ide_lock, flags);
888 spin_unlock_irqrestore(&ide_lock, flags);
889 mutex_unlock(&ide_setting_mtx);
890 return err >= 0 ? put_user(err, (long __user *)arg) : err;
893 if (bdev != bdev->bd_contains)
896 if (!capable(CAP_SYS_ADMIN))
899 mutex_lock(&ide_setting_mtx);
900 err = setfunc(drive, arg);
901 mutex_unlock(&ide_setting_mtx);
907 EXPORT_SYMBOL(generic_ide_ioctl);
910 * stridx() returns the offset of c within s,
911 * or -1 if c is '\0' or not found within s.
913 static int __init stridx (const char *s, char c)
915 char *i = strchr(s, c);
916 return (i && c) ? i - s : -1;
920 * match_parm() does parsing for ide_setup():
922 * 1. the first char of s must be '='.
923 * 2. if the remainder matches one of the supplied keywords,
924 * the index (1 based) of the keyword is negated and returned.
925 * 3. if the remainder is a series of no more than max_vals numbers
926 * separated by commas, the numbers are saved in vals[] and a
927 * count of how many were saved is returned. Base10 is assumed,
928 * and base16 is allowed when prefixed with "0x".
929 * 4. otherwise, zero is returned.
931 static int __init match_parm (char *s, const char *keywords[], int vals[], int max_vals)
933 static const char *decimal = "0123456789";
934 static const char *hex = "0123456789abcdef";
939 * Try matching against the supplied keywords,
940 * and return -(index+1) if we match one
942 if (keywords != NULL) {
943 for (i = 0; *keywords != NULL; ++i) {
944 if (!strcmp(s, *keywords++))
949 * Look for a series of no more than "max_vals"
950 * numeric values separated by commas, in base10,
951 * or base16 when prefixed with "0x".
952 * Return a count of how many were found.
954 for (n = 0; (i = stridx(decimal, *s)) >= 0;) {
956 while ((i = stridx(decimal, *++s)) >= 0)
957 vals[n] = (vals[n] * 10) + i;
958 if (*s == 'x' && !vals[n]) {
959 while ((i = stridx(hex, *++s)) >= 0)
960 vals[n] = (vals[n] * 0x10) + i;
964 if (*s == ',' || *s == ';')
970 return 0; /* zero = nothing matched */
973 extern int probe_ali14xx;
974 extern int probe_umc8672;
975 extern int probe_dtc2278;
976 extern int probe_ht6560b;
977 extern int probe_qd65xx;
978 extern int cmd640_vlb;
979 extern int probe_4drives;
981 static int __initdata is_chipset_set;
984 * ide_setup() gets called VERY EARLY during initialization,
985 * to handle kernel "command line" strings beginning with "hdx=" or "ide".
987 * Remember to update Documentation/ide/ide.txt if you change something here.
989 static int __init ide_setup(char *s)
994 unsigned int hw, unit;
995 const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1);
996 const char max_hwif = '0' + (MAX_HWIFS - 1);
999 if (strncmp(s,"hd",2) == 0 && s[2] == '=') /* hd= is for hd.c */
1000 return 0; /* driver and not us */
1002 if (strncmp(s,"ide",3) && strncmp(s,"idebus",6) && strncmp(s,"hd",2))
1005 printk(KERN_INFO "ide_setup: %s", s);
1008 #ifdef CONFIG_BLK_DEV_IDEDOUBLER
1009 if (!strcmp(s, "ide=doubler")) {
1010 extern int ide_doubler;
1012 printk(" : Enabled support for IDE doublers\n");
1016 #endif /* CONFIG_BLK_DEV_IDEDOUBLER */
1018 if (!strcmp(s, "ide=nodma")) {
1019 printk(" : Prevented DMA\n");
1021 goto obsolete_option;
1024 #ifdef CONFIG_BLK_DEV_IDEACPI
1025 if (!strcmp(s, "ide=noacpi")) {
1026 //printk(" : Disable IDE ACPI support.\n");
1030 if (!strcmp(s, "ide=acpigtf")) {
1031 //printk(" : Enable IDE ACPI _GTF support.\n");
1035 if (!strcmp(s, "ide=acpionboot")) {
1036 //printk(" : Call IDE ACPI methods on boot.\n");
1037 ide_noacpionboot = 0;
1040 #endif /* CONFIG_BLK_DEV_IDEACPI */
1043 * Look for drive options: "hdx="
1045 if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) {
1046 const char *hd_words[] = {
1047 "none", "noprobe", "nowerr", "cdrom", "nodma",
1048 "autotune", "noautotune", "-8", "-9", "-10",
1049 "noflush", "remap", "remap63", "scsi", NULL };
1051 hw = unit / MAX_DRIVES;
1052 unit = unit % MAX_DRIVES;
1053 hwif = &ide_hwifs[hw];
1054 drive = &hwif->drives[unit];
1055 if (strncmp(s + 4, "ide-", 4) == 0) {
1056 strlcpy(drive->driver_req, s + 4, sizeof(drive->driver_req));
1057 goto obsolete_option;
1059 switch (match_parm(&s[3], hd_words, vals, 3)) {
1060 case -1: /* "none" */
1061 case -2: /* "noprobe" */
1064 case -3: /* "nowerr" */
1065 drive->bad_wstat = BAD_R_STAT;
1068 case -4: /* "cdrom" */
1070 drive->media = ide_cdrom;
1071 /* an ATAPI device ignores DRDY */
1072 drive->ready_stat = 0;
1075 case -5: /* nodma */
1078 case -6: /* "autotune" */
1079 drive->autotune = IDE_TUNE_AUTO;
1080 goto obsolete_option;
1081 case -7: /* "noautotune" */
1082 drive->autotune = IDE_TUNE_NOAUTO;
1083 goto obsolete_option;
1084 case -11: /* noflush */
1087 case -12: /* "remap" */
1088 drive->remap_0_to_1 = 1;
1089 goto obsolete_option;
1090 case -13: /* "remap63" */
1092 goto obsolete_option;
1093 case -14: /* "scsi" */
1095 goto obsolete_option;
1096 case 3: /* cyl,head,sect */
1097 drive->media = ide_disk;
1098 drive->ready_stat = READY_STAT;
1099 drive->cyl = drive->bios_cyl = vals[0];
1100 drive->head = drive->bios_head = vals[1];
1101 drive->sect = drive->bios_sect = vals[2];
1103 drive->forced_geom = 1;
1111 if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e')
1114 * Look for bus speed option: "idebus="
1116 if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') {
1117 if (match_parm(&s[6], NULL, vals, 1) != 1)
1119 if (vals[0] >= 20 && vals[0] <= 66) {
1120 idebus_parameter = vals[0];
1122 printk(" -- BAD BUS SPEED! Expected value from 20 to 66");
1126 * Look for interface options: "idex="
1128 if (s[3] >= '0' && s[3] <= max_hwif) {
1130 * Be VERY CAREFUL changing this: note hardcoded indexes below
1131 * (-8, -9, -10) are reserved to ease the hardcoding.
1133 static const char *ide_words[] = {
1134 "noprobe", "serialize", "minus3", "minus4",
1135 "reset", "minus6", "ata66", "minus8", "minus9",
1136 "minus10", "four", "qd65xx", "ht6560b", "cmd640_vlb",
1137 "dtc2278", "umc8672", "ali14xx", NULL };
1140 hwif = &ide_hwifs[hw];
1141 i = match_parm(&s[4], ide_words, vals, 3);
1144 * Cryptic check to ensure chipset not already set for hwif.
1145 * Note: we can't depend on hwif->chipset here.
1147 if (i >= -18 && i <= -11) {
1148 /* chipset already specified */
1151 /* these drivers are for "ide0=" only */
1159 #ifdef CONFIG_BLK_DEV_ALI14XX
1160 case -17: /* "ali14xx" */
1162 goto obsolete_option;
1164 #ifdef CONFIG_BLK_DEV_UMC8672
1165 case -16: /* "umc8672" */
1167 goto obsolete_option;
1169 #ifdef CONFIG_BLK_DEV_DTC2278
1170 case -15: /* "dtc2278" */
1172 goto obsolete_option;
1174 #ifdef CONFIG_BLK_DEV_CMD640
1175 case -14: /* "cmd640_vlb" */
1177 goto obsolete_option;
1179 #ifdef CONFIG_BLK_DEV_HT6560B
1180 case -13: /* "ht6560b" */
1182 goto obsolete_option;
1184 #ifdef CONFIG_BLK_DEV_QD65XX
1185 case -12: /* "qd65xx" */
1187 goto obsolete_option;
1189 #ifdef CONFIG_BLK_DEV_4DRIVES
1190 case -11: /* "four" drives on one set of ports */
1192 goto obsolete_option;
1194 case -10: /* minus10 */
1195 case -9: /* minus9 */
1196 case -8: /* minus8 */
1201 case -7: /* ata66 */
1202 #ifdef CONFIG_BLK_DEV_IDEPCI
1204 * Use ATA_CBL_PATA40_SHORT so drive side
1205 * cable detection is also overriden.
1207 hwif->cbl = ATA_CBL_PATA40_SHORT;
1208 goto obsolete_option;
1212 case -5: /* "reset" */
1214 goto obsolete_option;
1215 case -2: /* "serialize" */
1216 hwif->mate = &ide_hwifs[hw^1];
1217 hwif->mate->mate = hwif;
1218 hwif->serialized = hwif->mate->serialized = 1;
1219 goto obsolete_option;
1221 case -1: /* "noprobe" */
1223 goto obsolete_option;
1230 printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n");
1235 printk(" -- BAD OPTION\n");
1238 printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n");
1241 printk("-- NOT SUPPORTED ON ide%d", hw);
1247 EXPORT_SYMBOL(ide_lock);
1249 static int ide_bus_match(struct device *dev, struct device_driver *drv)
1254 static char *media_string(ide_drive_t *drive)
1256 switch (drive->media) {
1272 static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf)
1274 ide_drive_t *drive = to_ide_device(dev);
1275 return sprintf(buf, "%s\n", media_string(drive));
1278 static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf)
1280 ide_drive_t *drive = to_ide_device(dev);
1281 return sprintf(buf, "%s\n", drive->name);
1284 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1286 ide_drive_t *drive = to_ide_device(dev);
1287 return sprintf(buf, "ide:m-%s\n", media_string(drive));
1290 static ssize_t model_show(struct device *dev, struct device_attribute *attr,
1293 ide_drive_t *drive = to_ide_device(dev);
1294 return sprintf(buf, "%s\n", drive->id->model);
1297 static ssize_t firmware_show(struct device *dev, struct device_attribute *attr,
1300 ide_drive_t *drive = to_ide_device(dev);
1301 return sprintf(buf, "%s\n", drive->id->fw_rev);
1304 static ssize_t serial_show(struct device *dev, struct device_attribute *attr,
1307 ide_drive_t *drive = to_ide_device(dev);
1308 return sprintf(buf, "%s\n", drive->id->serial_no);
1311 static struct device_attribute ide_dev_attrs[] = {
1313 __ATTR_RO(drivename),
1314 __ATTR_RO(modalias),
1316 __ATTR_RO(firmware),
1317 __ATTR(serial, 0400, serial_show, NULL),
1321 static int ide_uevent(struct device *dev, struct kobj_uevent_env *env)
1323 ide_drive_t *drive = to_ide_device(dev);
1325 add_uevent_var(env, "MEDIA=%s", media_string(drive));
1326 add_uevent_var(env, "DRIVENAME=%s", drive->name);
1327 add_uevent_var(env, "MODALIAS=ide:m-%s", media_string(drive));
1331 static int generic_ide_probe(struct device *dev)
1333 ide_drive_t *drive = to_ide_device(dev);
1334 ide_driver_t *drv = to_ide_driver(dev->driver);
1336 return drv->probe ? drv->probe(drive) : -ENODEV;
1339 static int generic_ide_remove(struct device *dev)
1341 ide_drive_t *drive = to_ide_device(dev);
1342 ide_driver_t *drv = to_ide_driver(dev->driver);
1350 static void generic_ide_shutdown(struct device *dev)
1352 ide_drive_t *drive = to_ide_device(dev);
1353 ide_driver_t *drv = to_ide_driver(dev->driver);
1355 if (dev->driver && drv->shutdown)
1356 drv->shutdown(drive);
1359 struct bus_type ide_bus_type = {
1361 .match = ide_bus_match,
1362 .uevent = ide_uevent,
1363 .probe = generic_ide_probe,
1364 .remove = generic_ide_remove,
1365 .shutdown = generic_ide_shutdown,
1366 .dev_attrs = ide_dev_attrs,
1367 .suspend = generic_ide_suspend,
1368 .resume = generic_ide_resume,
1371 EXPORT_SYMBOL_GPL(ide_bus_type);
1373 static void ide_port_class_release(struct device *portdev)
1375 ide_hwif_t *hwif = dev_get_drvdata(portdev);
1377 put_device(&hwif->gendev);
1381 * This is gets invoked once during initialization, to set *everything* up
1383 static int __init ide_init(void)
1387 printk(KERN_INFO "Uniform Multi-Platform E-IDE driver\n");
1388 system_bus_speed = ide_system_bus_speed();
1390 printk(KERN_INFO "ide: Assuming %dMHz system bus speed "
1391 "for PIO modes%s\n", system_bus_speed,
1392 idebus_parameter ? "" : "; override with idebus=xx");
1394 ret = bus_register(&ide_bus_type);
1396 printk(KERN_WARNING "IDE: bus_register error: %d\n", ret);
1400 ide_port_class = class_create(THIS_MODULE, "ide_port");
1401 if (IS_ERR(ide_port_class)) {
1402 ret = PTR_ERR(ide_port_class);
1403 goto out_port_class;
1405 ide_port_class->dev_release = ide_port_class_release;
1414 bus_unregister(&ide_bus_type);
1420 static char *options = NULL;
1421 module_param(options, charp, 0);
1422 MODULE_LICENSE("GPL");
1424 static void __init parse_options (char *line)
1428 if (line == NULL || !*line)
1430 while ((line = next) != NULL) {
1431 if ((next = strchr(line,' ')) != NULL)
1433 if (!ide_setup(line))
1434 printk (KERN_INFO "Unknown option '%s'\n", line);
1438 int __init init_module (void)
1440 parse_options(options);
1444 void __exit cleanup_module (void)
1448 for (index = 0; index < MAX_HWIFS; ++index)
1449 ide_unregister(index);
1453 class_destroy(ide_port_class);
1455 bus_unregister(&ide_bus_type);
1460 __setup("", ide_setup);
1462 module_init(ide_init);