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;
139 drive->ready_stat = READY_STAT;
140 drive->bad_wstat = BAD_W_STAT;
141 drive->special.b.recalibrate = 1;
142 drive->special.b.set_geometry = 1;
143 drive->name[0] = 'h';
144 drive->name[1] = 'd';
145 drive->name[2] = 'a' + j;
146 drive->max_failures = IDE_DEFAULT_MAX_FAILURES;
148 INIT_LIST_HEAD(&drive->list);
149 init_completion(&drive->gendev_rel_comp);
153 static void __init init_ide_data (void)
157 /* Initialise all interface structures */
158 for (index = 0; index < MAX_HWIFS; ++index) {
159 ide_hwif_t *hwif = &ide_hwifs[index];
161 ide_init_port_data(hwif, index);
165 void ide_remove_port_from_hwgroup(ide_hwif_t *hwif)
167 ide_hwgroup_t *hwgroup = hwif->hwgroup;
169 spin_lock_irq(&ide_lock);
171 * Remove us from the hwgroup, and free
172 * the hwgroup if we were the only member
174 if (hwif->next == hwif) {
175 BUG_ON(hwgroup->hwif != hwif);
178 /* There is another interface in hwgroup.
179 * Unlink us, and set hwgroup->drive and ->hwif to
182 ide_hwif_t *g = hwgroup->hwif;
184 while (g->next != hwif)
186 g->next = hwif->next;
187 if (hwgroup->hwif == hwif) {
188 /* Chose a random hwif for hwgroup->hwif.
189 * It's guaranteed that there are no drives
190 * left in the hwgroup.
192 BUG_ON(hwgroup->drive != NULL);
195 BUG_ON(hwgroup->hwif == hwif);
197 spin_unlock_irq(&ide_lock);
200 /* Called with ide_lock held. */
201 static void __ide_port_unregister_devices(ide_hwif_t *hwif)
205 for (i = 0; i < MAX_DRIVES; i++) {
206 ide_drive_t *drive = &hwif->drives[i];
208 if (drive->present) {
209 spin_unlock_irq(&ide_lock);
210 device_unregister(&drive->gendev);
211 wait_for_completion(&drive->gendev_rel_comp);
212 spin_lock_irq(&ide_lock);
217 void ide_port_unregister_devices(ide_hwif_t *hwif)
219 mutex_lock(&ide_cfg_mtx);
220 spin_lock_irq(&ide_lock);
221 __ide_port_unregister_devices(hwif);
223 ide_port_init_devices_data(hwif);
224 spin_unlock_irq(&ide_lock);
225 mutex_unlock(&ide_cfg_mtx);
227 EXPORT_SYMBOL_GPL(ide_port_unregister_devices);
230 * ide_unregister - free an IDE interface
231 * @hwif: IDE interface
233 * Perform the final unregister of an IDE interface. At the moment
234 * we don't refcount interfaces so this will also get split up.
237 * The caller must not hold the IDE locks
238 * The drive present/vanishing is not yet properly locked
239 * Take care with the callbacks. These have been split to avoid
240 * deadlocking the IDE layer. The shutdown callback is called
241 * before we take the lock and free resources. It is up to the
242 * caller to be sure there is no pending I/O here, and that
243 * the interface will not be reopened (present/vanishing locking
244 * isn't yet done BTW). After we commit to the final kill we
245 * call the cleanup callback with the ide locks held.
247 * Unregister restores the hwif structures to the default state.
248 * This is raving bonkers.
251 void ide_unregister(ide_hwif_t *hwif)
254 ide_hwgroup_t *hwgroup;
257 BUG_ON(in_interrupt());
258 BUG_ON(irqs_disabled());
260 mutex_lock(&ide_cfg_mtx);
262 spin_lock_irq(&ide_lock);
264 __ide_port_unregister_devices(hwif);
267 spin_unlock_irq(&ide_lock);
269 ide_proc_unregister_port(hwif);
271 hwgroup = hwif->hwgroup;
273 * free the irq if we were the only hwif using it
277 if (g->irq == hwif->irq)
280 } while (g != hwgroup->hwif);
282 free_irq(hwif->irq, hwgroup);
284 ide_remove_port_from_hwgroup(hwif);
286 device_unregister(hwif->portdev);
287 device_unregister(&hwif->gendev);
288 wait_for_completion(&hwif->gendev_rel_comp);
291 * Remove us from the kernel's knowledge
293 blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS);
294 kfree(hwif->sg_table);
295 unregister_blkdev(hwif->major, hwif->name);
298 ide_release_dma_engine(hwif);
300 spin_lock_irq(&ide_lock);
301 /* restore hwif data to pristine status */
302 ide_init_port_data(hwif, hwif->index);
303 spin_unlock_irq(&ide_lock);
305 mutex_unlock(&ide_cfg_mtx);
308 EXPORT_SYMBOL(ide_unregister);
310 void ide_init_port_hw(ide_hwif_t *hwif, hw_regs_t *hw)
312 memcpy(&hwif->io_ports, &hw->io_ports, sizeof(hwif->io_ports));
314 hwif->chipset = hw->chipset;
315 hwif->gendev.parent = hw->dev;
316 hwif->ack_intr = hw->ack_intr;
318 EXPORT_SYMBOL_GPL(ide_init_port_hw);
321 * Locks for IDE setting functionality
324 DEFINE_MUTEX(ide_setting_mtx);
326 EXPORT_SYMBOL_GPL(ide_setting_mtx);
329 * ide_spin_wait_hwgroup - wait for group
330 * @drive: drive in the group
332 * Wait for an IDE device group to go non busy and then return
333 * holding the ide_lock which guards the hwgroup->busy status
334 * and right to use it.
337 int ide_spin_wait_hwgroup (ide_drive_t *drive)
339 ide_hwgroup_t *hwgroup = HWGROUP(drive);
340 unsigned long timeout = jiffies + (3 * HZ);
342 spin_lock_irq(&ide_lock);
344 while (hwgroup->busy) {
345 unsigned long lflags;
346 spin_unlock_irq(&ide_lock);
347 local_irq_set(lflags);
348 if (time_after(jiffies, timeout)) {
349 local_irq_restore(lflags);
350 printk(KERN_ERR "%s: channel busy\n", drive->name);
353 local_irq_restore(lflags);
354 spin_lock_irq(&ide_lock);
359 EXPORT_SYMBOL(ide_spin_wait_hwgroup);
361 int set_io_32bit(ide_drive_t *drive, int arg)
363 if (drive->no_io_32bit)
366 if (arg < 0 || arg > 1 + (SUPPORT_VLB_SYNC << 1))
369 if (ide_spin_wait_hwgroup(drive))
372 drive->io_32bit = arg;
374 spin_unlock_irq(&ide_lock);
379 static int set_ksettings(ide_drive_t *drive, int arg)
381 if (arg < 0 || arg > 1)
384 if (ide_spin_wait_hwgroup(drive))
386 drive->keep_settings = arg;
387 spin_unlock_irq(&ide_lock);
392 int set_using_dma(ide_drive_t *drive, int arg)
394 #ifdef CONFIG_BLK_DEV_IDEDMA
395 ide_hwif_t *hwif = drive->hwif;
398 if (arg < 0 || arg > 1)
401 if (!drive->id || !(drive->id->capability & 1))
404 if (hwif->dma_ops == NULL)
408 if (ide_spin_wait_hwgroup(drive))
411 * set ->busy flag, unlock and let it ride
413 hwif->hwgroup->busy = 1;
414 spin_unlock_irq(&ide_lock);
419 if (ide_set_dma(drive))
425 * lock, clear ->busy flag and unlock before leaving
427 spin_lock_irq(&ide_lock);
428 hwif->hwgroup->busy = 0;
429 spin_unlock_irq(&ide_lock);
433 if (arg < 0 || arg > 1)
440 int set_pio_mode(ide_drive_t *drive, int arg)
443 ide_hwif_t *hwif = drive->hwif;
444 const struct ide_port_ops *port_ops = hwif->port_ops;
446 if (arg < 0 || arg > 255)
449 if (port_ops == NULL || port_ops->set_pio_mode == NULL ||
450 (hwif->host_flags & IDE_HFLAG_NO_SET_MODE))
453 if (drive->special.b.set_tune)
456 rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
457 rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
459 drive->tune_req = (u8) arg;
460 drive->special.b.set_tune = 1;
462 blk_execute_rq(drive->queue, NULL, rq, 0);
468 static int set_unmaskirq(ide_drive_t *drive, int arg)
470 if (drive->no_unmask)
473 if (arg < 0 || arg > 1)
476 if (ide_spin_wait_hwgroup(drive))
479 spin_unlock_irq(&ide_lock);
484 static int generic_ide_suspend(struct device *dev, pm_message_t mesg)
486 ide_drive_t *drive = dev->driver_data;
487 ide_hwif_t *hwif = HWIF(drive);
489 struct request_pm_state rqpm;
493 /* Call ACPI _GTM only once */
494 if (!(drive->dn % 2))
495 ide_acpi_get_timing(hwif);
497 memset(&rqpm, 0, sizeof(rqpm));
498 memset(&args, 0, sizeof(args));
499 rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
500 rq->cmd_type = REQ_TYPE_PM_SUSPEND;
503 rqpm.pm_step = ide_pm_state_start_suspend;
504 if (mesg.event == PM_EVENT_PRETHAW)
505 mesg.event = PM_EVENT_FREEZE;
506 rqpm.pm_state = mesg.event;
508 ret = blk_execute_rq(drive->queue, NULL, rq, 0);
510 /* only call ACPI _PS3 after both drivers are suspended */
511 if (!ret && (((drive->dn % 2) && hwif->drives[0].present
512 && hwif->drives[1].present)
513 || !hwif->drives[0].present
514 || !hwif->drives[1].present))
515 ide_acpi_set_state(hwif, 0);
519 static int generic_ide_resume(struct device *dev)
521 ide_drive_t *drive = dev->driver_data;
522 ide_hwif_t *hwif = HWIF(drive);
524 struct request_pm_state rqpm;
528 /* Call ACPI _STM only once */
529 if (!(drive->dn % 2)) {
530 ide_acpi_set_state(hwif, 1);
531 ide_acpi_push_timing(hwif);
534 ide_acpi_exec_tfs(drive);
536 memset(&rqpm, 0, sizeof(rqpm));
537 memset(&args, 0, sizeof(args));
538 rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
539 rq->cmd_type = REQ_TYPE_PM_RESUME;
540 rq->cmd_flags |= REQ_PREEMPT;
543 rqpm.pm_step = ide_pm_state_start_resume;
544 rqpm.pm_state = PM_EVENT_ON;
546 err = blk_execute_rq(drive->queue, NULL, rq, 1);
549 if (err == 0 && dev->driver) {
550 ide_driver_t *drv = to_ide_driver(dev->driver);
559 int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev,
560 unsigned int cmd, unsigned long arg)
564 void __user *p = (void __user *)arg;
565 int err = 0, (*setfunc)(ide_drive_t *, int);
569 case HDIO_GET_32BIT: val = &drive->io_32bit; goto read_val;
570 case HDIO_GET_KEEPSETTINGS: val = &drive->keep_settings; goto read_val;
571 case HDIO_GET_UNMASKINTR: val = &drive->unmask; goto read_val;
572 case HDIO_GET_DMA: val = &drive->using_dma; goto read_val;
573 case HDIO_SET_32BIT: setfunc = set_io_32bit; goto set_val;
574 case HDIO_SET_KEEPSETTINGS: setfunc = set_ksettings; goto set_val;
575 case HDIO_SET_PIO_MODE: setfunc = set_pio_mode; goto set_val;
576 case HDIO_SET_UNMASKINTR: setfunc = set_unmaskirq; goto set_val;
577 case HDIO_SET_DMA: setfunc = set_using_dma; goto set_val;
581 case HDIO_OBSOLETE_IDENTITY:
582 case HDIO_GET_IDENTITY:
583 if (bdev != bdev->bd_contains)
585 if (drive->id_read == 0)
587 if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142))
592 return put_user(drive->dsc_overlap << IDE_NICE_DSC_OVERLAP |
593 drive->atapi_overlap << IDE_NICE_ATAPI_OVERLAP |
594 drive->nice1 << IDE_NICE_1,
595 (long __user *) arg);
596 #ifdef CONFIG_IDE_TASK_IOCTL
597 case HDIO_DRIVE_TASKFILE:
598 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
600 switch(drive->media) {
602 return ide_taskfile_ioctl(drive, cmd, arg);
606 #endif /* CONFIG_IDE_TASK_IOCTL */
609 if (!capable(CAP_SYS_RAWIO))
611 return ide_cmd_ioctl(drive, cmd, arg);
613 case HDIO_DRIVE_TASK:
614 if (!capable(CAP_SYS_RAWIO))
616 return ide_task_ioctl(drive, cmd, arg);
618 if (!capable(CAP_SYS_ADMIN)) return -EACCES;
619 if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1))))
621 drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1;
622 drv = *(ide_driver_t **)bdev->bd_disk->private_data;
623 if (drive->dsc_overlap && !drv->supports_dsc_overlap) {
624 drive->dsc_overlap = 0;
627 drive->nice1 = (arg >> IDE_NICE_1) & 1;
629 case HDIO_DRIVE_RESET:
630 if (!capable(CAP_SYS_ADMIN))
634 * Abort the current command on the
635 * group if there is one, taking
636 * care not to allow anything else
637 * to be queued and to die on the
638 * spot if we miss one somehow
641 spin_lock_irqsave(&ide_lock, flags);
643 if (HWGROUP(drive)->resetting) {
644 spin_unlock_irqrestore(&ide_lock, flags);
648 ide_abort(drive, "drive reset");
650 BUG_ON(HWGROUP(drive)->handler);
652 /* Ensure nothing gets queued after we
653 drop the lock. Reset will clear the busy */
655 HWGROUP(drive)->busy = 1;
656 spin_unlock_irqrestore(&ide_lock, flags);
657 (void) ide_do_reset(drive);
660 case HDIO_GET_BUSSTATE:
661 if (!capable(CAP_SYS_ADMIN))
663 if (put_user(HWIF(drive)->bus_state, (long __user *)arg))
667 case HDIO_SET_BUSSTATE:
668 if (!capable(CAP_SYS_ADMIN))
676 mutex_lock(&ide_setting_mtx);
677 spin_lock_irqsave(&ide_lock, flags);
679 spin_unlock_irqrestore(&ide_lock, flags);
680 mutex_unlock(&ide_setting_mtx);
681 return err >= 0 ? put_user(err, (long __user *)arg) : err;
684 if (bdev != bdev->bd_contains)
687 if (!capable(CAP_SYS_ADMIN))
690 mutex_lock(&ide_setting_mtx);
691 err = setfunc(drive, arg);
692 mutex_unlock(&ide_setting_mtx);
698 EXPORT_SYMBOL(generic_ide_ioctl);
700 static int ide_bus_match(struct device *dev, struct device_driver *drv)
705 static char *media_string(ide_drive_t *drive)
707 switch (drive->media) {
723 static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf)
725 ide_drive_t *drive = to_ide_device(dev);
726 return sprintf(buf, "%s\n", media_string(drive));
729 static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf)
731 ide_drive_t *drive = to_ide_device(dev);
732 return sprintf(buf, "%s\n", drive->name);
735 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
737 ide_drive_t *drive = to_ide_device(dev);
738 return sprintf(buf, "ide:m-%s\n", media_string(drive));
741 static ssize_t model_show(struct device *dev, struct device_attribute *attr,
744 ide_drive_t *drive = to_ide_device(dev);
745 return sprintf(buf, "%s\n", drive->id->model);
748 static ssize_t firmware_show(struct device *dev, struct device_attribute *attr,
751 ide_drive_t *drive = to_ide_device(dev);
752 return sprintf(buf, "%s\n", drive->id->fw_rev);
755 static ssize_t serial_show(struct device *dev, struct device_attribute *attr,
758 ide_drive_t *drive = to_ide_device(dev);
759 return sprintf(buf, "%s\n", drive->id->serial_no);
762 static struct device_attribute ide_dev_attrs[] = {
764 __ATTR_RO(drivename),
768 __ATTR(serial, 0400, serial_show, NULL),
772 static int ide_uevent(struct device *dev, struct kobj_uevent_env *env)
774 ide_drive_t *drive = to_ide_device(dev);
776 add_uevent_var(env, "MEDIA=%s", media_string(drive));
777 add_uevent_var(env, "DRIVENAME=%s", drive->name);
778 add_uevent_var(env, "MODALIAS=ide:m-%s", media_string(drive));
782 static int generic_ide_probe(struct device *dev)
784 ide_drive_t *drive = to_ide_device(dev);
785 ide_driver_t *drv = to_ide_driver(dev->driver);
787 return drv->probe ? drv->probe(drive) : -ENODEV;
790 static int generic_ide_remove(struct device *dev)
792 ide_drive_t *drive = to_ide_device(dev);
793 ide_driver_t *drv = to_ide_driver(dev->driver);
801 static void generic_ide_shutdown(struct device *dev)
803 ide_drive_t *drive = to_ide_device(dev);
804 ide_driver_t *drv = to_ide_driver(dev->driver);
806 if (dev->driver && drv->shutdown)
807 drv->shutdown(drive);
810 struct bus_type ide_bus_type = {
812 .match = ide_bus_match,
813 .uevent = ide_uevent,
814 .probe = generic_ide_probe,
815 .remove = generic_ide_remove,
816 .shutdown = generic_ide_shutdown,
817 .dev_attrs = ide_dev_attrs,
818 .suspend = generic_ide_suspend,
819 .resume = generic_ide_resume,
822 EXPORT_SYMBOL_GPL(ide_bus_type);
825 EXPORT_SYMBOL_GPL(ide_vlb_clk);
827 module_param_named(vlb_clock, ide_vlb_clk, int, 0);
828 MODULE_PARM_DESC(vlb_clock, "VLB clock frequency (in MHz)");
831 EXPORT_SYMBOL_GPL(ide_pci_clk);
833 module_param_named(pci_clock, ide_pci_clk, int, 0);
834 MODULE_PARM_DESC(pci_clock, "PCI bus clock frequency (in MHz)");
836 static int ide_set_dev_param_mask(const char *s, struct kernel_param *kp)
839 unsigned int *dev_param_mask = (unsigned int *)kp->arg;
841 if (sscanf(s, "%d.%d:%d", &a, &b, &j) != 3 &&
842 sscanf(s, "%d.%d", &a, &b) != 2)
845 i = a * MAX_DRIVES + b;
847 if (i >= MAX_HWIFS * MAX_DRIVES || j < 0 || j > 1)
851 *dev_param_mask |= (1 << i);
853 *dev_param_mask &= (1 << i);
858 static unsigned int ide_nodma;
860 module_param_call(nodma, ide_set_dev_param_mask, NULL, &ide_nodma, 0);
861 MODULE_PARM_DESC(nodma, "disallow DMA for a device");
863 static unsigned int ide_noflush;
865 module_param_call(noflush, ide_set_dev_param_mask, NULL, &ide_noflush, 0);
866 MODULE_PARM_DESC(noflush, "disable flush requests for a device");
868 static unsigned int ide_noprobe;
870 module_param_call(noprobe, ide_set_dev_param_mask, NULL, &ide_noprobe, 0);
871 MODULE_PARM_DESC(noprobe, "skip probing for a device");
873 static unsigned int ide_nowerr;
875 module_param_call(nowerr, ide_set_dev_param_mask, NULL, &ide_nowerr, 0);
876 MODULE_PARM_DESC(nowerr, "ignore the WRERR_STAT bit for a device");
878 static unsigned int ide_cdroms;
880 module_param_call(cdrom, ide_set_dev_param_mask, NULL, &ide_cdroms, 0);
881 MODULE_PARM_DESC(cdrom, "force device as a CD-ROM");
889 static unsigned int ide_disks;
890 static struct chs_geom ide_disks_chs[MAX_HWIFS * MAX_DRIVES];
892 static int ide_set_disk_chs(const char *str, struct kernel_param *kp)
894 int a, b, c = 0, h = 0, s = 0, i, j = 1;
896 if (sscanf(str, "%d.%d:%d,%d,%d", &a, &b, &c, &h, &s) != 5 &&
897 sscanf(str, "%d.%d:%d", &a, &b, &j) != 3)
900 i = a * MAX_DRIVES + b;
902 if (i >= MAX_HWIFS * MAX_DRIVES || j < 0 || j > 1)
905 if (c > INT_MAX || h > 255 || s > 255)
909 ide_disks |= (1 << i);
911 ide_disks &= (1 << i);
913 ide_disks_chs[i].cyl = c;
914 ide_disks_chs[i].head = h;
915 ide_disks_chs[i].sect = s;
920 module_param_call(chs, ide_set_disk_chs, NULL, NULL, 0);
921 MODULE_PARM_DESC(chs, "force device as a disk (using CHS)");
923 static void ide_dev_apply_params(ide_drive_t *drive)
925 int i = drive->hwif->index * MAX_DRIVES + drive->select.b.unit;
927 if (ide_nodma & (1 << i)) {
928 printk(KERN_INFO "ide: disallowing DMA for %s\n", drive->name);
931 if (ide_noflush & (1 << i)) {
932 printk(KERN_INFO "ide: disabling flush requests for %s\n",
936 if (ide_noprobe & (1 << i)) {
937 printk(KERN_INFO "ide: skipping probe for %s\n", drive->name);
940 if (ide_nowerr & (1 << i)) {
941 printk(KERN_INFO "ide: ignoring the WRERR_STAT bit for %s\n",
943 drive->bad_wstat = BAD_R_STAT;
945 if (ide_cdroms & (1 << i)) {
946 printk(KERN_INFO "ide: forcing %s as a CD-ROM\n", drive->name);
948 drive->media = ide_cdrom;
949 /* an ATAPI device ignores DRDY */
950 drive->ready_stat = 0;
952 if (ide_disks & (1 << i)) {
953 drive->cyl = drive->bios_cyl = ide_disks_chs[i].cyl;
954 drive->head = drive->bios_head = ide_disks_chs[i].head;
955 drive->sect = drive->bios_sect = ide_disks_chs[i].sect;
956 drive->forced_geom = 1;
957 printk(KERN_INFO "ide: forcing %s as a disk (%d/%d/%d)\n",
959 drive->cyl, drive->head, drive->sect);
961 drive->media = ide_disk;
962 drive->ready_stat = READY_STAT;
966 static unsigned int ide_ignore_cable;
968 static int ide_set_ignore_cable(const char *s, struct kernel_param *kp)
972 if (sscanf(s, "%d:%d", &i, &j) != 2 && sscanf(s, "%d", &i) != 1)
975 if (i >= MAX_HWIFS || j < 0 || j > 1)
979 ide_ignore_cable |= (1 << i);
981 ide_ignore_cable &= (1 << i);
986 module_param_call(ignore_cable, ide_set_ignore_cable, NULL, NULL, 0);
987 MODULE_PARM_DESC(ignore_cable, "ignore cable detection");
989 void ide_port_apply_params(ide_hwif_t *hwif)
993 if (ide_ignore_cable & (1 << hwif->index)) {
994 printk(KERN_INFO "ide: ignoring cable detection for %s\n",
996 hwif->cbl = ATA_CBL_PATA40_SHORT;
999 for (i = 0; i < MAX_DRIVES; i++)
1000 ide_dev_apply_params(&hwif->drives[i]);
1004 * This is gets invoked once during initialization, to set *everything* up
1006 static int __init ide_init(void)
1010 printk(KERN_INFO "Uniform Multi-Platform E-IDE driver\n");
1012 ret = bus_register(&ide_bus_type);
1014 printk(KERN_WARNING "IDE: bus_register error: %d\n", ret);
1018 ide_port_class = class_create(THIS_MODULE, "ide_port");
1019 if (IS_ERR(ide_port_class)) {
1020 ret = PTR_ERR(ide_port_class);
1021 goto out_port_class;
1031 bus_unregister(&ide_bus_type);
1036 static void __exit ide_exit(void)
1040 class_destroy(ide_port_class);
1042 bus_unregister(&ide_bus_type);
1045 module_init(ide_init);
1046 module_exit(ide_exit);
1048 MODULE_LICENSE("GPL");