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/interrupt.h>
54 #include <linux/major.h>
55 #include <linux/errno.h>
56 #include <linux/genhd.h>
57 #include <linux/slab.h>
58 #include <linux/init.h>
59 #include <linux/pci.h>
60 #include <linux/ide.h>
61 #include <linux/completion.h>
62 #include <linux/device.h>
65 /* default maximum number of failures */
66 #define IDE_DEFAULT_MAX_FAILURES 1
68 struct class *ide_port_class;
70 static const u8 ide_hwif_to_major[] = { IDE0_MAJOR, IDE1_MAJOR,
71 IDE2_MAJOR, IDE3_MAJOR,
72 IDE4_MAJOR, IDE5_MAJOR,
73 IDE6_MAJOR, IDE7_MAJOR,
74 IDE8_MAJOR, IDE9_MAJOR };
76 DEFINE_MUTEX(ide_cfg_mtx);
78 __cacheline_aligned_in_smp DEFINE_SPINLOCK(ide_lock);
79 EXPORT_SYMBOL(ide_lock);
81 static void ide_port_init_devices_data(ide_hwif_t *);
84 * Do not even *think* about calling this!
86 void ide_init_port_data(ide_hwif_t *hwif, unsigned int index)
88 /* bulk initialize hwif & drive info with zeros */
89 memset(hwif, 0, sizeof(ide_hwif_t));
91 /* fill in any non-zero initial values */
93 hwif->major = ide_hwif_to_major[index];
98 hwif->name[3] = '0' + index;
100 hwif->bus_state = BUSSTATE_ON;
102 init_completion(&hwif->gendev_rel_comp);
104 default_hwif_iops(hwif);
105 default_hwif_transport(hwif);
107 ide_port_init_devices_data(hwif);
110 static void ide_port_init_devices_data(ide_hwif_t *hwif)
114 for (unit = 0; unit < MAX_DRIVES; ++unit) {
115 ide_drive_t *drive = &hwif->drives[unit];
116 u8 j = (hwif->index * MAX_DRIVES) + unit;
118 memset(drive, 0, sizeof(*drive));
120 drive->media = ide_disk;
121 drive->select.all = (unit<<4)|0xa0;
123 drive->ready_stat = READY_STAT;
124 drive->bad_wstat = BAD_W_STAT;
125 drive->special.b.recalibrate = 1;
126 drive->special.b.set_geometry = 1;
127 drive->name[0] = 'h';
128 drive->name[1] = 'd';
129 drive->name[2] = 'a' + j;
130 drive->max_failures = IDE_DEFAULT_MAX_FAILURES;
132 INIT_LIST_HEAD(&drive->list);
133 init_completion(&drive->gendev_rel_comp);
137 void ide_remove_port_from_hwgroup(ide_hwif_t *hwif)
139 ide_hwgroup_t *hwgroup = hwif->hwgroup;
141 spin_lock_irq(&ide_lock);
143 * Remove us from the hwgroup, and free
144 * the hwgroup if we were the only member
146 if (hwif->next == hwif) {
147 BUG_ON(hwgroup->hwif != hwif);
150 /* There is another interface in hwgroup.
151 * Unlink us, and set hwgroup->drive and ->hwif to
154 ide_hwif_t *g = hwgroup->hwif;
156 while (g->next != hwif)
158 g->next = hwif->next;
159 if (hwgroup->hwif == hwif) {
160 /* Chose a random hwif for hwgroup->hwif.
161 * It's guaranteed that there are no drives
162 * left in the hwgroup.
164 BUG_ON(hwgroup->drive != NULL);
167 BUG_ON(hwgroup->hwif == hwif);
169 spin_unlock_irq(&ide_lock);
172 /* Called with ide_lock held. */
173 static void __ide_port_unregister_devices(ide_hwif_t *hwif)
177 for (i = 0; i < MAX_DRIVES; i++) {
178 ide_drive_t *drive = &hwif->drives[i];
180 if (drive->present) {
181 spin_unlock_irq(&ide_lock);
182 device_unregister(&drive->gendev);
183 wait_for_completion(&drive->gendev_rel_comp);
184 spin_lock_irq(&ide_lock);
189 void ide_port_unregister_devices(ide_hwif_t *hwif)
191 mutex_lock(&ide_cfg_mtx);
192 spin_lock_irq(&ide_lock);
193 __ide_port_unregister_devices(hwif);
195 ide_port_init_devices_data(hwif);
196 spin_unlock_irq(&ide_lock);
197 mutex_unlock(&ide_cfg_mtx);
199 EXPORT_SYMBOL_GPL(ide_port_unregister_devices);
202 * ide_unregister - free an IDE interface
203 * @hwif: IDE interface
205 * Perform the final unregister of an IDE interface. At the moment
206 * we don't refcount interfaces so this will also get split up.
209 * The caller must not hold the IDE locks
210 * The drive present/vanishing is not yet properly locked
211 * Take care with the callbacks. These have been split to avoid
212 * deadlocking the IDE layer. The shutdown callback is called
213 * before we take the lock and free resources. It is up to the
214 * caller to be sure there is no pending I/O here, and that
215 * the interface will not be reopened (present/vanishing locking
216 * isn't yet done BTW). After we commit to the final kill we
217 * call the cleanup callback with the ide locks held.
219 * Unregister restores the hwif structures to the default state.
220 * This is raving bonkers.
223 void ide_unregister(ide_hwif_t *hwif)
226 ide_hwgroup_t *hwgroup;
229 BUG_ON(in_interrupt());
230 BUG_ON(irqs_disabled());
232 mutex_lock(&ide_cfg_mtx);
234 spin_lock_irq(&ide_lock);
236 __ide_port_unregister_devices(hwif);
239 spin_unlock_irq(&ide_lock);
241 ide_proc_unregister_port(hwif);
243 hwgroup = hwif->hwgroup;
245 * free the irq if we were the only hwif using it
249 if (g->irq == hwif->irq)
252 } while (g != hwgroup->hwif);
254 free_irq(hwif->irq, hwgroup);
256 ide_remove_port_from_hwgroup(hwif);
258 device_unregister(hwif->portdev);
259 device_unregister(&hwif->gendev);
260 wait_for_completion(&hwif->gendev_rel_comp);
263 * Remove us from the kernel's knowledge
265 blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS);
266 kfree(hwif->sg_table);
267 unregister_blkdev(hwif->major, hwif->name);
270 ide_release_dma_engine(hwif);
272 spin_lock_irq(&ide_lock);
273 /* restore hwif data to pristine status */
274 ide_init_port_data(hwif, hwif->index);
275 spin_unlock_irq(&ide_lock);
277 mutex_unlock(&ide_cfg_mtx);
280 EXPORT_SYMBOL(ide_unregister);
282 void ide_init_port_hw(ide_hwif_t *hwif, hw_regs_t *hw)
284 memcpy(&hwif->io_ports, &hw->io_ports, sizeof(hwif->io_ports));
286 hwif->chipset = hw->chipset;
288 hwif->gendev.parent = hw->parent ? hw->parent : hw->dev;
289 hwif->ack_intr = hw->ack_intr;
293 * Locks for IDE setting functionality
296 DEFINE_MUTEX(ide_setting_mtx);
298 EXPORT_SYMBOL_GPL(ide_setting_mtx);
301 * ide_spin_wait_hwgroup - wait for group
302 * @drive: drive in the group
304 * Wait for an IDE device group to go non busy and then return
305 * holding the ide_lock which guards the hwgroup->busy status
306 * and right to use it.
309 int ide_spin_wait_hwgroup (ide_drive_t *drive)
311 ide_hwgroup_t *hwgroup = HWGROUP(drive);
312 unsigned long timeout = jiffies + (3 * HZ);
314 spin_lock_irq(&ide_lock);
316 while (hwgroup->busy) {
317 unsigned long lflags;
318 spin_unlock_irq(&ide_lock);
319 local_irq_set(lflags);
320 if (time_after(jiffies, timeout)) {
321 local_irq_restore(lflags);
322 printk(KERN_ERR "%s: channel busy\n", drive->name);
325 local_irq_restore(lflags);
326 spin_lock_irq(&ide_lock);
331 EXPORT_SYMBOL(ide_spin_wait_hwgroup);
333 int set_io_32bit(ide_drive_t *drive, int arg)
335 if (drive->no_io_32bit)
338 if (arg < 0 || arg > 1 + (SUPPORT_VLB_SYNC << 1))
341 if (ide_spin_wait_hwgroup(drive))
344 drive->io_32bit = arg;
346 spin_unlock_irq(&ide_lock);
351 static int set_ksettings(ide_drive_t *drive, int arg)
353 if (arg < 0 || arg > 1)
356 if (ide_spin_wait_hwgroup(drive))
358 drive->keep_settings = arg;
359 spin_unlock_irq(&ide_lock);
364 int set_using_dma(ide_drive_t *drive, int arg)
366 #ifdef CONFIG_BLK_DEV_IDEDMA
367 ide_hwif_t *hwif = drive->hwif;
370 if (arg < 0 || arg > 1)
373 if (!drive->id || !(drive->id->capability & 1))
376 if (hwif->dma_ops == NULL)
380 if (ide_spin_wait_hwgroup(drive))
383 * set ->busy flag, unlock and let it ride
385 hwif->hwgroup->busy = 1;
386 spin_unlock_irq(&ide_lock);
391 if (ide_set_dma(drive))
397 * lock, clear ->busy flag and unlock before leaving
399 spin_lock_irq(&ide_lock);
400 hwif->hwgroup->busy = 0;
401 spin_unlock_irq(&ide_lock);
405 if (arg < 0 || arg > 1)
412 int set_pio_mode(ide_drive_t *drive, int arg)
415 ide_hwif_t *hwif = drive->hwif;
416 const struct ide_port_ops *port_ops = hwif->port_ops;
418 if (arg < 0 || arg > 255)
421 if (port_ops == NULL || port_ops->set_pio_mode == NULL ||
422 (hwif->host_flags & IDE_HFLAG_NO_SET_MODE))
425 if (drive->special.b.set_tune)
428 rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
429 rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
431 drive->tune_req = (u8) arg;
432 drive->special.b.set_tune = 1;
434 blk_execute_rq(drive->queue, NULL, rq, 0);
440 static int set_unmaskirq(ide_drive_t *drive, int arg)
442 if (drive->no_unmask)
445 if (arg < 0 || arg > 1)
448 if (ide_spin_wait_hwgroup(drive))
451 spin_unlock_irq(&ide_lock);
456 static int generic_ide_suspend(struct device *dev, pm_message_t mesg)
458 ide_drive_t *drive = dev->driver_data;
459 ide_hwif_t *hwif = HWIF(drive);
461 struct request_pm_state rqpm;
465 /* Call ACPI _GTM only once */
466 if (!(drive->dn % 2))
467 ide_acpi_get_timing(hwif);
469 memset(&rqpm, 0, sizeof(rqpm));
470 memset(&args, 0, sizeof(args));
471 rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
472 rq->cmd_type = REQ_TYPE_PM_SUSPEND;
475 rqpm.pm_step = ide_pm_state_start_suspend;
476 if (mesg.event == PM_EVENT_PRETHAW)
477 mesg.event = PM_EVENT_FREEZE;
478 rqpm.pm_state = mesg.event;
480 ret = blk_execute_rq(drive->queue, NULL, rq, 0);
482 /* only call ACPI _PS3 after both drivers are suspended */
483 if (!ret && (((drive->dn % 2) && hwif->drives[0].present
484 && hwif->drives[1].present)
485 || !hwif->drives[0].present
486 || !hwif->drives[1].present))
487 ide_acpi_set_state(hwif, 0);
491 static int generic_ide_resume(struct device *dev)
493 ide_drive_t *drive = dev->driver_data;
494 ide_hwif_t *hwif = HWIF(drive);
496 struct request_pm_state rqpm;
500 /* Call ACPI _STM only once */
501 if (!(drive->dn % 2)) {
502 ide_acpi_set_state(hwif, 1);
503 ide_acpi_push_timing(hwif);
506 ide_acpi_exec_tfs(drive);
508 memset(&rqpm, 0, sizeof(rqpm));
509 memset(&args, 0, sizeof(args));
510 rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
511 rq->cmd_type = REQ_TYPE_PM_RESUME;
512 rq->cmd_flags |= REQ_PREEMPT;
515 rqpm.pm_step = ide_pm_state_start_resume;
516 rqpm.pm_state = PM_EVENT_ON;
518 err = blk_execute_rq(drive->queue, NULL, rq, 1);
521 if (err == 0 && dev->driver) {
522 ide_driver_t *drv = to_ide_driver(dev->driver);
531 static int generic_drive_reset(ide_drive_t *drive)
536 rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
537 rq->cmd_type = REQ_TYPE_SPECIAL;
539 rq->cmd[0] = REQ_DRIVE_RESET;
540 rq->cmd_flags |= REQ_SOFTBARRIER;
541 if (blk_execute_rq(drive->queue, NULL, rq, 1))
547 int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev,
548 unsigned int cmd, unsigned long arg)
552 void __user *p = (void __user *)arg;
553 int err = 0, (*setfunc)(ide_drive_t *, int);
557 case HDIO_GET_32BIT: val = &drive->io_32bit; goto read_val;
558 case HDIO_GET_KEEPSETTINGS: val = &drive->keep_settings; goto read_val;
559 case HDIO_GET_UNMASKINTR: val = &drive->unmask; goto read_val;
560 case HDIO_GET_DMA: val = &drive->using_dma; goto read_val;
561 case HDIO_SET_32BIT: setfunc = set_io_32bit; goto set_val;
562 case HDIO_SET_KEEPSETTINGS: setfunc = set_ksettings; goto set_val;
563 case HDIO_SET_PIO_MODE: setfunc = set_pio_mode; goto set_val;
564 case HDIO_SET_UNMASKINTR: setfunc = set_unmaskirq; goto set_val;
565 case HDIO_SET_DMA: setfunc = set_using_dma; goto set_val;
569 case HDIO_OBSOLETE_IDENTITY:
570 case HDIO_GET_IDENTITY:
571 if (bdev != bdev->bd_contains)
573 if (drive->id_read == 0)
575 if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142))
580 return put_user(drive->dsc_overlap << IDE_NICE_DSC_OVERLAP |
581 drive->atapi_overlap << IDE_NICE_ATAPI_OVERLAP |
582 drive->nice1 << IDE_NICE_1,
583 (long __user *) arg);
584 #ifdef CONFIG_IDE_TASK_IOCTL
585 case HDIO_DRIVE_TASKFILE:
586 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
588 switch(drive->media) {
590 return ide_taskfile_ioctl(drive, cmd, arg);
594 #endif /* CONFIG_IDE_TASK_IOCTL */
597 if (!capable(CAP_SYS_RAWIO))
599 return ide_cmd_ioctl(drive, cmd, arg);
601 case HDIO_DRIVE_TASK:
602 if (!capable(CAP_SYS_RAWIO))
604 return ide_task_ioctl(drive, cmd, arg);
606 if (!capable(CAP_SYS_ADMIN)) return -EACCES;
607 if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1))))
609 drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1;
610 drv = *(ide_driver_t **)bdev->bd_disk->private_data;
611 if (drive->dsc_overlap && !drv->supports_dsc_overlap) {
612 drive->dsc_overlap = 0;
615 drive->nice1 = (arg >> IDE_NICE_1) & 1;
617 case HDIO_DRIVE_RESET:
618 if (!capable(CAP_SYS_ADMIN))
621 return generic_drive_reset(drive);
623 case HDIO_GET_BUSSTATE:
624 if (!capable(CAP_SYS_ADMIN))
626 if (put_user(HWIF(drive)->bus_state, (long __user *)arg))
630 case HDIO_SET_BUSSTATE:
631 if (!capable(CAP_SYS_ADMIN))
639 mutex_lock(&ide_setting_mtx);
640 spin_lock_irqsave(&ide_lock, flags);
642 spin_unlock_irqrestore(&ide_lock, flags);
643 mutex_unlock(&ide_setting_mtx);
644 return err >= 0 ? put_user(err, (long __user *)arg) : err;
647 if (bdev != bdev->bd_contains)
650 if (!capable(CAP_SYS_ADMIN))
653 mutex_lock(&ide_setting_mtx);
654 err = setfunc(drive, arg);
655 mutex_unlock(&ide_setting_mtx);
661 EXPORT_SYMBOL(generic_ide_ioctl);
663 static int ide_bus_match(struct device *dev, struct device_driver *drv)
668 static char *media_string(ide_drive_t *drive)
670 switch (drive->media) {
686 static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf)
688 ide_drive_t *drive = to_ide_device(dev);
689 return sprintf(buf, "%s\n", media_string(drive));
692 static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf)
694 ide_drive_t *drive = to_ide_device(dev);
695 return sprintf(buf, "%s\n", drive->name);
698 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
700 ide_drive_t *drive = to_ide_device(dev);
701 return sprintf(buf, "ide:m-%s\n", media_string(drive));
704 static ssize_t model_show(struct device *dev, struct device_attribute *attr,
707 ide_drive_t *drive = to_ide_device(dev);
708 return sprintf(buf, "%s\n", drive->id->model);
711 static ssize_t firmware_show(struct device *dev, struct device_attribute *attr,
714 ide_drive_t *drive = to_ide_device(dev);
715 return sprintf(buf, "%s\n", drive->id->fw_rev);
718 static ssize_t serial_show(struct device *dev, struct device_attribute *attr,
721 ide_drive_t *drive = to_ide_device(dev);
722 return sprintf(buf, "%s\n", drive->id->serial_no);
725 static struct device_attribute ide_dev_attrs[] = {
727 __ATTR_RO(drivename),
731 __ATTR(serial, 0400, serial_show, NULL),
735 static int ide_uevent(struct device *dev, struct kobj_uevent_env *env)
737 ide_drive_t *drive = to_ide_device(dev);
739 add_uevent_var(env, "MEDIA=%s", media_string(drive));
740 add_uevent_var(env, "DRIVENAME=%s", drive->name);
741 add_uevent_var(env, "MODALIAS=ide:m-%s", media_string(drive));
745 static int generic_ide_probe(struct device *dev)
747 ide_drive_t *drive = to_ide_device(dev);
748 ide_driver_t *drv = to_ide_driver(dev->driver);
750 return drv->probe ? drv->probe(drive) : -ENODEV;
753 static int generic_ide_remove(struct device *dev)
755 ide_drive_t *drive = to_ide_device(dev);
756 ide_driver_t *drv = to_ide_driver(dev->driver);
764 static void generic_ide_shutdown(struct device *dev)
766 ide_drive_t *drive = to_ide_device(dev);
767 ide_driver_t *drv = to_ide_driver(dev->driver);
769 if (dev->driver && drv->shutdown)
770 drv->shutdown(drive);
773 struct bus_type ide_bus_type = {
775 .match = ide_bus_match,
776 .uevent = ide_uevent,
777 .probe = generic_ide_probe,
778 .remove = generic_ide_remove,
779 .shutdown = generic_ide_shutdown,
780 .dev_attrs = ide_dev_attrs,
781 .suspend = generic_ide_suspend,
782 .resume = generic_ide_resume,
785 EXPORT_SYMBOL_GPL(ide_bus_type);
788 EXPORT_SYMBOL_GPL(ide_vlb_clk);
790 module_param_named(vlb_clock, ide_vlb_clk, int, 0);
791 MODULE_PARM_DESC(vlb_clock, "VLB clock frequency (in MHz)");
794 EXPORT_SYMBOL_GPL(ide_pci_clk);
796 module_param_named(pci_clock, ide_pci_clk, int, 0);
797 MODULE_PARM_DESC(pci_clock, "PCI bus clock frequency (in MHz)");
799 static int ide_set_dev_param_mask(const char *s, struct kernel_param *kp)
802 unsigned int *dev_param_mask = (unsigned int *)kp->arg;
804 if (sscanf(s, "%d.%d:%d", &a, &b, &j) != 3 &&
805 sscanf(s, "%d.%d", &a, &b) != 2)
808 i = a * MAX_DRIVES + b;
810 if (i >= MAX_HWIFS * MAX_DRIVES || j < 0 || j > 1)
814 *dev_param_mask |= (1 << i);
816 *dev_param_mask &= (1 << i);
821 static unsigned int ide_nodma;
823 module_param_call(nodma, ide_set_dev_param_mask, NULL, &ide_nodma, 0);
824 MODULE_PARM_DESC(nodma, "disallow DMA for a device");
826 static unsigned int ide_noflush;
828 module_param_call(noflush, ide_set_dev_param_mask, NULL, &ide_noflush, 0);
829 MODULE_PARM_DESC(noflush, "disable flush requests for a device");
831 static unsigned int ide_noprobe;
833 module_param_call(noprobe, ide_set_dev_param_mask, NULL, &ide_noprobe, 0);
834 MODULE_PARM_DESC(noprobe, "skip probing for a device");
836 static unsigned int ide_nowerr;
838 module_param_call(nowerr, ide_set_dev_param_mask, NULL, &ide_nowerr, 0);
839 MODULE_PARM_DESC(nowerr, "ignore the WRERR_STAT bit for a device");
841 static unsigned int ide_cdroms;
843 module_param_call(cdrom, ide_set_dev_param_mask, NULL, &ide_cdroms, 0);
844 MODULE_PARM_DESC(cdrom, "force device as a CD-ROM");
852 static unsigned int ide_disks;
853 static struct chs_geom ide_disks_chs[MAX_HWIFS * MAX_DRIVES];
855 static int ide_set_disk_chs(const char *str, struct kernel_param *kp)
857 int a, b, c = 0, h = 0, s = 0, i, j = 1;
859 if (sscanf(str, "%d.%d:%d,%d,%d", &a, &b, &c, &h, &s) != 5 &&
860 sscanf(str, "%d.%d:%d", &a, &b, &j) != 3)
863 i = a * MAX_DRIVES + b;
865 if (i >= MAX_HWIFS * MAX_DRIVES || j < 0 || j > 1)
868 if (c > INT_MAX || h > 255 || s > 255)
872 ide_disks |= (1 << i);
874 ide_disks &= (1 << i);
876 ide_disks_chs[i].cyl = c;
877 ide_disks_chs[i].head = h;
878 ide_disks_chs[i].sect = s;
883 module_param_call(chs, ide_set_disk_chs, NULL, NULL, 0);
884 MODULE_PARM_DESC(chs, "force device as a disk (using CHS)");
886 static void ide_dev_apply_params(ide_drive_t *drive)
888 int i = drive->hwif->index * MAX_DRIVES + drive->select.b.unit;
890 if (ide_nodma & (1 << i)) {
891 printk(KERN_INFO "ide: disallowing DMA for %s\n", drive->name);
894 if (ide_noflush & (1 << i)) {
895 printk(KERN_INFO "ide: disabling flush requests for %s\n",
899 if (ide_noprobe & (1 << i)) {
900 printk(KERN_INFO "ide: skipping probe for %s\n", drive->name);
903 if (ide_nowerr & (1 << i)) {
904 printk(KERN_INFO "ide: ignoring the WRERR_STAT bit for %s\n",
906 drive->bad_wstat = BAD_R_STAT;
908 if (ide_cdroms & (1 << i)) {
909 printk(KERN_INFO "ide: forcing %s as a CD-ROM\n", drive->name);
911 drive->media = ide_cdrom;
912 /* an ATAPI device ignores DRDY */
913 drive->ready_stat = 0;
915 if (ide_disks & (1 << i)) {
916 drive->cyl = drive->bios_cyl = ide_disks_chs[i].cyl;
917 drive->head = drive->bios_head = ide_disks_chs[i].head;
918 drive->sect = drive->bios_sect = ide_disks_chs[i].sect;
919 drive->forced_geom = 1;
920 printk(KERN_INFO "ide: forcing %s as a disk (%d/%d/%d)\n",
922 drive->cyl, drive->head, drive->sect);
924 drive->media = ide_disk;
925 drive->ready_stat = READY_STAT;
929 static unsigned int ide_ignore_cable;
931 static int ide_set_ignore_cable(const char *s, struct kernel_param *kp)
935 if (sscanf(s, "%d:%d", &i, &j) != 2 && sscanf(s, "%d", &i) != 1)
938 if (i >= MAX_HWIFS || j < 0 || j > 1)
942 ide_ignore_cable |= (1 << i);
944 ide_ignore_cable &= (1 << i);
949 module_param_call(ignore_cable, ide_set_ignore_cable, NULL, NULL, 0);
950 MODULE_PARM_DESC(ignore_cable, "ignore cable detection");
952 void ide_port_apply_params(ide_hwif_t *hwif)
956 if (ide_ignore_cable & (1 << hwif->index)) {
957 printk(KERN_INFO "ide: ignoring cable detection for %s\n",
959 hwif->cbl = ATA_CBL_PATA40_SHORT;
962 for (i = 0; i < MAX_DRIVES; i++)
963 ide_dev_apply_params(&hwif->drives[i]);
967 * This is gets invoked once during initialization, to set *everything* up
969 static int __init ide_init(void)
973 printk(KERN_INFO "Uniform Multi-Platform E-IDE driver\n");
975 ret = bus_register(&ide_bus_type);
977 printk(KERN_WARNING "IDE: bus_register error: %d\n", ret);
981 ide_port_class = class_create(THIS_MODULE, "ide_port");
982 if (IS_ERR(ide_port_class)) {
983 ret = PTR_ERR(ide_port_class);
992 bus_unregister(&ide_bus_type);
997 static void __exit ide_exit(void)
1001 class_destroy(ide_port_class);
1003 bus_unregister(&ide_bus_type);
1006 module_init(ide_init);
1007 module_exit(ide_exit);
1009 MODULE_LICENSE("GPL");