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 DEFINE_MUTEX(ide_cfg_mtx);
91 __cacheline_aligned_in_smp DEFINE_SPINLOCK(ide_lock);
92 EXPORT_SYMBOL(ide_lock);
94 ide_hwif_t ide_hwifs[MAX_HWIFS]; /* master data repository */
96 static void ide_port_init_devices_data(ide_hwif_t *);
99 * Do not even *think* about calling this!
101 void ide_init_port_data(ide_hwif_t *hwif, unsigned int index)
103 /* bulk initialize hwif & drive info with zeros */
104 memset(hwif, 0, sizeof(ide_hwif_t));
106 /* fill in any non-zero initial values */
108 hwif->major = ide_hwif_to_major[index];
113 hwif->name[3] = '0' + index;
115 hwif->bus_state = BUSSTATE_ON;
117 init_completion(&hwif->gendev_rel_comp);
119 default_hwif_iops(hwif);
120 default_hwif_transport(hwif);
122 ide_port_init_devices_data(hwif);
124 EXPORT_SYMBOL_GPL(ide_init_port_data);
126 static void ide_port_init_devices_data(ide_hwif_t *hwif)
130 for (unit = 0; unit < MAX_DRIVES; ++unit) {
131 ide_drive_t *drive = &hwif->drives[unit];
132 u8 j = (hwif->index * MAX_DRIVES) + unit;
134 memset(drive, 0, sizeof(*drive));
136 drive->media = ide_disk;
137 drive->select.all = (unit<<4)|0xa0;
140 drive->ready_stat = READY_STAT;
141 drive->bad_wstat = BAD_W_STAT;
142 drive->special.b.recalibrate = 1;
143 drive->special.b.set_geometry = 1;
144 drive->name[0] = 'h';
145 drive->name[1] = 'd';
146 drive->name[2] = 'a' + j;
147 drive->max_failures = IDE_DEFAULT_MAX_FAILURES;
149 INIT_LIST_HEAD(&drive->list);
150 init_completion(&drive->gendev_rel_comp);
154 static void __init init_ide_data (void)
158 /* Initialise all interface structures */
159 for (index = 0; index < MAX_HWIFS; ++index) {
160 ide_hwif_t *hwif = &ide_hwifs[index];
162 ide_init_port_data(hwif, index);
166 void ide_remove_port_from_hwgroup(ide_hwif_t *hwif)
168 ide_hwgroup_t *hwgroup = hwif->hwgroup;
170 spin_lock_irq(&ide_lock);
172 * Remove us from the hwgroup, and free
173 * the hwgroup if we were the only member
175 if (hwif->next == hwif) {
176 BUG_ON(hwgroup->hwif != hwif);
179 /* There is another interface in hwgroup.
180 * Unlink us, and set hwgroup->drive and ->hwif to
183 ide_hwif_t *g = hwgroup->hwif;
185 while (g->next != hwif)
187 g->next = hwif->next;
188 if (hwgroup->hwif == hwif) {
189 /* Chose a random hwif for hwgroup->hwif.
190 * It's guaranteed that there are no drives
191 * left in the hwgroup.
193 BUG_ON(hwgroup->drive != NULL);
196 BUG_ON(hwgroup->hwif == hwif);
198 spin_unlock_irq(&ide_lock);
201 /* Called with ide_lock held. */
202 static void __ide_port_unregister_devices(ide_hwif_t *hwif)
206 for (i = 0; i < MAX_DRIVES; i++) {
207 ide_drive_t *drive = &hwif->drives[i];
209 if (drive->present) {
210 spin_unlock_irq(&ide_lock);
211 device_unregister(&drive->gendev);
212 wait_for_completion(&drive->gendev_rel_comp);
213 spin_lock_irq(&ide_lock);
218 void ide_port_unregister_devices(ide_hwif_t *hwif)
220 mutex_lock(&ide_cfg_mtx);
221 spin_lock_irq(&ide_lock);
222 __ide_port_unregister_devices(hwif);
224 ide_port_init_devices_data(hwif);
225 spin_unlock_irq(&ide_lock);
226 mutex_unlock(&ide_cfg_mtx);
228 EXPORT_SYMBOL_GPL(ide_port_unregister_devices);
231 * ide_unregister - free an IDE interface
232 * @hwif: IDE interface
234 * Perform the final unregister of an IDE interface. At the moment
235 * we don't refcount interfaces so this will also get split up.
238 * The caller must not hold the IDE locks
239 * The drive present/vanishing is not yet properly locked
240 * Take care with the callbacks. These have been split to avoid
241 * deadlocking the IDE layer. The shutdown callback is called
242 * before we take the lock and free resources. It is up to the
243 * caller to be sure there is no pending I/O here, and that
244 * the interface will not be reopened (present/vanishing locking
245 * isn't yet done BTW). After we commit to the final kill we
246 * call the cleanup callback with the ide locks held.
248 * Unregister restores the hwif structures to the default state.
249 * This is raving bonkers.
252 void ide_unregister(ide_hwif_t *hwif)
255 ide_hwgroup_t *hwgroup;
258 BUG_ON(in_interrupt());
259 BUG_ON(irqs_disabled());
261 mutex_lock(&ide_cfg_mtx);
263 spin_lock_irq(&ide_lock);
265 __ide_port_unregister_devices(hwif);
268 spin_unlock_irq(&ide_lock);
270 ide_proc_unregister_port(hwif);
272 hwgroup = hwif->hwgroup;
274 * free the irq if we were the only hwif using it
278 if (g->irq == hwif->irq)
281 } while (g != hwgroup->hwif);
283 free_irq(hwif->irq, hwgroup);
285 ide_remove_port_from_hwgroup(hwif);
287 device_unregister(hwif->portdev);
288 device_unregister(&hwif->gendev);
289 wait_for_completion(&hwif->gendev_rel_comp);
292 * Remove us from the kernel's knowledge
294 blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS);
295 kfree(hwif->sg_table);
296 unregister_blkdev(hwif->major, hwif->name);
299 ide_release_dma_engine(hwif);
301 spin_lock_irq(&ide_lock);
302 /* restore hwif data to pristine status */
303 ide_init_port_data(hwif, hwif->index);
304 spin_unlock_irq(&ide_lock);
306 mutex_unlock(&ide_cfg_mtx);
309 EXPORT_SYMBOL(ide_unregister);
311 void ide_init_port_hw(ide_hwif_t *hwif, hw_regs_t *hw)
313 memcpy(&hwif->io_ports, &hw->io_ports, sizeof(hwif->io_ports));
315 hwif->chipset = hw->chipset;
316 hwif->gendev.parent = hw->dev;
317 hwif->ack_intr = hw->ack_intr;
319 EXPORT_SYMBOL_GPL(ide_init_port_hw);
322 * Locks for IDE setting functionality
325 DEFINE_MUTEX(ide_setting_mtx);
327 EXPORT_SYMBOL_GPL(ide_setting_mtx);
330 * ide_spin_wait_hwgroup - wait for group
331 * @drive: drive in the group
333 * Wait for an IDE device group to go non busy and then return
334 * holding the ide_lock which guards the hwgroup->busy status
335 * and right to use it.
338 int ide_spin_wait_hwgroup (ide_drive_t *drive)
340 ide_hwgroup_t *hwgroup = HWGROUP(drive);
341 unsigned long timeout = jiffies + (3 * HZ);
343 spin_lock_irq(&ide_lock);
345 while (hwgroup->busy) {
346 unsigned long lflags;
347 spin_unlock_irq(&ide_lock);
348 local_irq_set(lflags);
349 if (time_after(jiffies, timeout)) {
350 local_irq_restore(lflags);
351 printk(KERN_ERR "%s: channel busy\n", drive->name);
354 local_irq_restore(lflags);
355 spin_lock_irq(&ide_lock);
360 EXPORT_SYMBOL(ide_spin_wait_hwgroup);
362 int set_io_32bit(ide_drive_t *drive, int arg)
364 if (drive->no_io_32bit)
367 if (arg < 0 || arg > 1 + (SUPPORT_VLB_SYNC << 1))
370 if (ide_spin_wait_hwgroup(drive))
373 drive->io_32bit = arg;
375 spin_unlock_irq(&ide_lock);
380 static int set_ksettings(ide_drive_t *drive, int arg)
382 if (arg < 0 || arg > 1)
385 if (ide_spin_wait_hwgroup(drive))
387 drive->keep_settings = arg;
388 spin_unlock_irq(&ide_lock);
393 int set_using_dma(ide_drive_t *drive, int arg)
395 #ifdef CONFIG_BLK_DEV_IDEDMA
396 ide_hwif_t *hwif = drive->hwif;
399 if (arg < 0 || arg > 1)
402 if (!drive->id || !(drive->id->capability & 1))
405 if (hwif->dma_ops == NULL)
409 if (ide_spin_wait_hwgroup(drive))
412 * set ->busy flag, unlock and let it ride
414 hwif->hwgroup->busy = 1;
415 spin_unlock_irq(&ide_lock);
420 if (ide_set_dma(drive))
426 * lock, clear ->busy flag and unlock before leaving
428 spin_lock_irq(&ide_lock);
429 hwif->hwgroup->busy = 0;
430 spin_unlock_irq(&ide_lock);
434 if (arg < 0 || arg > 1)
441 int set_pio_mode(ide_drive_t *drive, int arg)
444 ide_hwif_t *hwif = drive->hwif;
445 const struct ide_port_ops *port_ops = hwif->port_ops;
447 if (arg < 0 || arg > 255)
450 if (port_ops == NULL || port_ops->set_pio_mode == NULL ||
451 (hwif->host_flags & IDE_HFLAG_NO_SET_MODE))
454 if (drive->special.b.set_tune)
457 rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
458 rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
460 drive->tune_req = (u8) arg;
461 drive->special.b.set_tune = 1;
463 blk_execute_rq(drive->queue, NULL, rq, 0);
469 static int set_unmaskirq(ide_drive_t *drive, int arg)
471 if (drive->no_unmask)
474 if (arg < 0 || arg > 1)
477 if (ide_spin_wait_hwgroup(drive))
480 spin_unlock_irq(&ide_lock);
485 static int generic_ide_suspend(struct device *dev, pm_message_t mesg)
487 ide_drive_t *drive = dev->driver_data;
488 ide_hwif_t *hwif = HWIF(drive);
490 struct request_pm_state rqpm;
494 /* Call ACPI _GTM only once */
495 if (!(drive->dn % 2))
496 ide_acpi_get_timing(hwif);
498 memset(&rqpm, 0, sizeof(rqpm));
499 memset(&args, 0, sizeof(args));
500 rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
501 rq->cmd_type = REQ_TYPE_PM_SUSPEND;
504 rqpm.pm_step = ide_pm_state_start_suspend;
505 if (mesg.event == PM_EVENT_PRETHAW)
506 mesg.event = PM_EVENT_FREEZE;
507 rqpm.pm_state = mesg.event;
509 ret = blk_execute_rq(drive->queue, NULL, rq, 0);
511 /* only call ACPI _PS3 after both drivers are suspended */
512 if (!ret && (((drive->dn % 2) && hwif->drives[0].present
513 && hwif->drives[1].present)
514 || !hwif->drives[0].present
515 || !hwif->drives[1].present))
516 ide_acpi_set_state(hwif, 0);
520 static int generic_ide_resume(struct device *dev)
522 ide_drive_t *drive = dev->driver_data;
523 ide_hwif_t *hwif = HWIF(drive);
525 struct request_pm_state rqpm;
529 /* Call ACPI _STM only once */
530 if (!(drive->dn % 2)) {
531 ide_acpi_set_state(hwif, 1);
532 ide_acpi_push_timing(hwif);
535 ide_acpi_exec_tfs(drive);
537 memset(&rqpm, 0, sizeof(rqpm));
538 memset(&args, 0, sizeof(args));
539 rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
540 rq->cmd_type = REQ_TYPE_PM_RESUME;
541 rq->cmd_flags |= REQ_PREEMPT;
544 rqpm.pm_step = ide_pm_state_start_resume;
545 rqpm.pm_state = PM_EVENT_ON;
547 err = blk_execute_rq(drive->queue, NULL, rq, 1);
550 if (err == 0 && dev->driver) {
551 ide_driver_t *drv = to_ide_driver(dev->driver);
560 int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev,
561 unsigned int cmd, unsigned long arg)
565 void __user *p = (void __user *)arg;
566 int err = 0, (*setfunc)(ide_drive_t *, int);
570 case HDIO_GET_32BIT: val = &drive->io_32bit; goto read_val;
571 case HDIO_GET_KEEPSETTINGS: val = &drive->keep_settings; goto read_val;
572 case HDIO_GET_UNMASKINTR: val = &drive->unmask; goto read_val;
573 case HDIO_GET_DMA: val = &drive->using_dma; goto read_val;
574 case HDIO_SET_32BIT: setfunc = set_io_32bit; goto set_val;
575 case HDIO_SET_KEEPSETTINGS: setfunc = set_ksettings; goto set_val;
576 case HDIO_SET_PIO_MODE: setfunc = set_pio_mode; goto set_val;
577 case HDIO_SET_UNMASKINTR: setfunc = set_unmaskirq; goto set_val;
578 case HDIO_SET_DMA: setfunc = set_using_dma; goto set_val;
582 case HDIO_OBSOLETE_IDENTITY:
583 case HDIO_GET_IDENTITY:
584 if (bdev != bdev->bd_contains)
586 if (drive->id_read == 0)
588 if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142))
593 return put_user(drive->dsc_overlap << IDE_NICE_DSC_OVERLAP |
594 drive->atapi_overlap << IDE_NICE_ATAPI_OVERLAP |
595 drive->nice1 << IDE_NICE_1,
596 (long __user *) arg);
597 #ifdef CONFIG_IDE_TASK_IOCTL
598 case HDIO_DRIVE_TASKFILE:
599 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
601 switch(drive->media) {
603 return ide_taskfile_ioctl(drive, cmd, arg);
607 #endif /* CONFIG_IDE_TASK_IOCTL */
610 if (!capable(CAP_SYS_RAWIO))
612 return ide_cmd_ioctl(drive, cmd, arg);
614 case HDIO_DRIVE_TASK:
615 if (!capable(CAP_SYS_RAWIO))
617 return ide_task_ioctl(drive, cmd, arg);
619 if (!capable(CAP_SYS_ADMIN)) return -EACCES;
620 if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1))))
622 drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1;
623 drv = *(ide_driver_t **)bdev->bd_disk->private_data;
624 if (drive->dsc_overlap && !drv->supports_dsc_overlap) {
625 drive->dsc_overlap = 0;
628 drive->nice1 = (arg >> IDE_NICE_1) & 1;
630 case HDIO_DRIVE_RESET:
631 if (!capable(CAP_SYS_ADMIN))
635 * Abort the current command on the
636 * group if there is one, taking
637 * care not to allow anything else
638 * to be queued and to die on the
639 * spot if we miss one somehow
642 spin_lock_irqsave(&ide_lock, flags);
644 if (HWGROUP(drive)->resetting) {
645 spin_unlock_irqrestore(&ide_lock, flags);
649 ide_abort(drive, "drive reset");
651 BUG_ON(HWGROUP(drive)->handler);
653 /* Ensure nothing gets queued after we
654 drop the lock. Reset will clear the busy */
656 HWGROUP(drive)->busy = 1;
657 spin_unlock_irqrestore(&ide_lock, flags);
658 (void) ide_do_reset(drive);
661 case HDIO_GET_BUSSTATE:
662 if (!capable(CAP_SYS_ADMIN))
664 if (put_user(HWIF(drive)->bus_state, (long __user *)arg))
668 case HDIO_SET_BUSSTATE:
669 if (!capable(CAP_SYS_ADMIN))
677 mutex_lock(&ide_setting_mtx);
678 spin_lock_irqsave(&ide_lock, flags);
680 spin_unlock_irqrestore(&ide_lock, flags);
681 mutex_unlock(&ide_setting_mtx);
682 return err >= 0 ? put_user(err, (long __user *)arg) : err;
685 if (bdev != bdev->bd_contains)
688 if (!capable(CAP_SYS_ADMIN))
691 mutex_lock(&ide_setting_mtx);
692 err = setfunc(drive, arg);
693 mutex_unlock(&ide_setting_mtx);
699 EXPORT_SYMBOL(generic_ide_ioctl);
701 static int ide_bus_match(struct device *dev, struct device_driver *drv)
706 static char *media_string(ide_drive_t *drive)
708 switch (drive->media) {
724 static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf)
726 ide_drive_t *drive = to_ide_device(dev);
727 return sprintf(buf, "%s\n", media_string(drive));
730 static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf)
732 ide_drive_t *drive = to_ide_device(dev);
733 return sprintf(buf, "%s\n", drive->name);
736 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
738 ide_drive_t *drive = to_ide_device(dev);
739 return sprintf(buf, "ide:m-%s\n", media_string(drive));
742 static ssize_t model_show(struct device *dev, struct device_attribute *attr,
745 ide_drive_t *drive = to_ide_device(dev);
746 return sprintf(buf, "%s\n", drive->id->model);
749 static ssize_t firmware_show(struct device *dev, struct device_attribute *attr,
752 ide_drive_t *drive = to_ide_device(dev);
753 return sprintf(buf, "%s\n", drive->id->fw_rev);
756 static ssize_t serial_show(struct device *dev, struct device_attribute *attr,
759 ide_drive_t *drive = to_ide_device(dev);
760 return sprintf(buf, "%s\n", drive->id->serial_no);
763 static struct device_attribute ide_dev_attrs[] = {
765 __ATTR_RO(drivename),
769 __ATTR(serial, 0400, serial_show, NULL),
773 static int ide_uevent(struct device *dev, struct kobj_uevent_env *env)
775 ide_drive_t *drive = to_ide_device(dev);
777 add_uevent_var(env, "MEDIA=%s", media_string(drive));
778 add_uevent_var(env, "DRIVENAME=%s", drive->name);
779 add_uevent_var(env, "MODALIAS=ide:m-%s", media_string(drive));
783 static int generic_ide_probe(struct device *dev)
785 ide_drive_t *drive = to_ide_device(dev);
786 ide_driver_t *drv = to_ide_driver(dev->driver);
788 return drv->probe ? drv->probe(drive) : -ENODEV;
791 static int generic_ide_remove(struct device *dev)
793 ide_drive_t *drive = to_ide_device(dev);
794 ide_driver_t *drv = to_ide_driver(dev->driver);
802 static void generic_ide_shutdown(struct device *dev)
804 ide_drive_t *drive = to_ide_device(dev);
805 ide_driver_t *drv = to_ide_driver(dev->driver);
807 if (dev->driver && drv->shutdown)
808 drv->shutdown(drive);
811 struct bus_type ide_bus_type = {
813 .match = ide_bus_match,
814 .uevent = ide_uevent,
815 .probe = generic_ide_probe,
816 .remove = generic_ide_remove,
817 .shutdown = generic_ide_shutdown,
818 .dev_attrs = ide_dev_attrs,
819 .suspend = generic_ide_suspend,
820 .resume = generic_ide_resume,
823 EXPORT_SYMBOL_GPL(ide_bus_type);
826 EXPORT_SYMBOL_GPL(ide_vlb_clk);
828 module_param_named(vlb_clock, ide_vlb_clk, int, 0);
829 MODULE_PARM_DESC(vlb_clock, "VLB clock frequency (in MHz)");
832 EXPORT_SYMBOL_GPL(ide_pci_clk);
834 module_param_named(pci_clock, ide_pci_clk, int, 0);
835 MODULE_PARM_DESC(pci_clock, "PCI bus clock frequency (in MHz)");
837 static int ide_set_dev_param_mask(const char *s, struct kernel_param *kp)
840 unsigned int *dev_param_mask = (unsigned int *)kp->arg;
842 if (sscanf(s, "%d.%d:%d", &a, &b, &j) != 3 &&
843 sscanf(s, "%d.%d", &a, &b) != 2)
846 i = a * MAX_DRIVES + b;
848 if (i >= MAX_HWIFS * MAX_DRIVES || j < 0 || j > 1)
852 *dev_param_mask |= (1 << i);
854 *dev_param_mask &= (1 << i);
859 static unsigned int ide_nodma;
861 module_param_call(nodma, ide_set_dev_param_mask, NULL, &ide_nodma, 0);
862 MODULE_PARM_DESC(nodma, "disallow DMA for a device");
864 static unsigned int ide_noflush;
866 module_param_call(noflush, ide_set_dev_param_mask, NULL, &ide_noflush, 0);
867 MODULE_PARM_DESC(noflush, "disable flush requests for a device");
869 static unsigned int ide_noprobe;
871 module_param_call(noprobe, ide_set_dev_param_mask, NULL, &ide_noprobe, 0);
872 MODULE_PARM_DESC(noprobe, "skip probing for a device");
874 static unsigned int ide_nowerr;
876 module_param_call(nowerr, ide_set_dev_param_mask, NULL, &ide_nowerr, 0);
877 MODULE_PARM_DESC(nowerr, "ignore the WRERR_STAT bit for a device");
879 static unsigned int ide_cdroms;
881 module_param_call(cdrom, ide_set_dev_param_mask, NULL, &ide_cdroms, 0);
882 MODULE_PARM_DESC(cdrom, "force device as a CD-ROM");
890 static unsigned int ide_disks;
891 static struct chs_geom ide_disks_chs[MAX_HWIFS * MAX_DRIVES];
893 static int ide_set_disk_chs(const char *str, struct kernel_param *kp)
895 int a, b, c = 0, h = 0, s = 0, i, j = 1;
897 if (sscanf(str, "%d.%d:%d,%d,%d", &a, &b, &c, &h, &s) != 5 &&
898 sscanf(str, "%d.%d:%d", &a, &b, &j) != 3)
901 i = a * MAX_DRIVES + b;
903 if (i >= MAX_HWIFS * MAX_DRIVES || j < 0 || j > 1)
906 if (c > INT_MAX || h > 255 || s > 255)
910 ide_disks |= (1 << i);
912 ide_disks &= (1 << i);
914 ide_disks_chs[i].cyl = c;
915 ide_disks_chs[i].head = h;
916 ide_disks_chs[i].sect = s;
921 module_param_call(chs, ide_set_disk_chs, NULL, NULL, 0);
922 MODULE_PARM_DESC(chs, "force device as a disk (using CHS)");
924 static void ide_dev_apply_params(ide_drive_t *drive)
926 int i = drive->hwif->index * MAX_DRIVES + drive->select.b.unit;
928 if (ide_nodma & (1 << i)) {
929 printk(KERN_INFO "ide: disallowing DMA for %s\n", drive->name);
932 if (ide_noflush & (1 << i)) {
933 printk(KERN_INFO "ide: disabling flush requests for %s\n",
937 if (ide_noprobe & (1 << i)) {
938 printk(KERN_INFO "ide: skipping probe for %s\n", drive->name);
941 if (ide_nowerr & (1 << i)) {
942 printk(KERN_INFO "ide: ignoring the WRERR_STAT bit for %s\n",
944 drive->bad_wstat = BAD_R_STAT;
946 if (ide_cdroms & (1 << i)) {
947 printk(KERN_INFO "ide: forcing %s as a CD-ROM\n", drive->name);
949 drive->media = ide_cdrom;
950 /* an ATAPI device ignores DRDY */
951 drive->ready_stat = 0;
953 if (ide_disks & (1 << i)) {
954 drive->cyl = drive->bios_cyl = ide_disks_chs[i].cyl;
955 drive->head = drive->bios_head = ide_disks_chs[i].head;
956 drive->sect = drive->bios_sect = ide_disks_chs[i].sect;
957 drive->forced_geom = 1;
958 printk(KERN_INFO "ide: forcing %s as a disk (%d/%d/%d)\n",
960 drive->cyl, drive->head, drive->sect);
962 drive->media = ide_disk;
963 drive->ready_stat = READY_STAT;
967 static unsigned int ide_ignore_cable;
969 static int ide_set_ignore_cable(const char *s, struct kernel_param *kp)
973 if (sscanf(s, "%d:%d", &i, &j) != 2 && sscanf(s, "%d", &i) != 1)
976 if (i >= MAX_HWIFS || j < 0 || j > 1)
980 ide_ignore_cable |= (1 << i);
982 ide_ignore_cable &= (1 << i);
987 module_param_call(ignore_cable, ide_set_ignore_cable, NULL, NULL, 0);
988 MODULE_PARM_DESC(ignore_cable, "ignore cable detection");
990 void ide_port_apply_params(ide_hwif_t *hwif)
994 if (ide_ignore_cable & (1 << hwif->index)) {
995 printk(KERN_INFO "ide: ignoring cable detection for %s\n",
997 hwif->cbl = ATA_CBL_PATA40_SHORT;
1000 for (i = 0; i < MAX_DRIVES; i++)
1001 ide_dev_apply_params(&hwif->drives[i]);
1005 * This is gets invoked once during initialization, to set *everything* up
1007 static int __init ide_init(void)
1011 printk(KERN_INFO "Uniform Multi-Platform E-IDE driver\n");
1013 ret = bus_register(&ide_bus_type);
1015 printk(KERN_WARNING "IDE: bus_register error: %d\n", ret);
1019 ide_port_class = class_create(THIS_MODULE, "ide_port");
1020 if (IS_ERR(ide_port_class)) {
1021 ret = PTR_ERR(ide_port_class);
1022 goto out_port_class;
1032 bus_unregister(&ide_bus_type);
1037 static void __exit ide_exit(void)
1041 class_destroy(ide_port_class);
1043 bus_unregister(&ide_bus_type);
1046 module_init(ide_init);
1047 module_exit(ide_exit);
1049 MODULE_LICENSE("GPL");