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_transport(hwif);
106 ide_port_init_devices_data(hwif);
109 static void ide_port_init_devices_data(ide_hwif_t *hwif)
113 for (unit = 0; unit < MAX_DRIVES; ++unit) {
114 ide_drive_t *drive = &hwif->drives[unit];
115 u8 j = (hwif->index * MAX_DRIVES) + unit;
117 memset(drive, 0, sizeof(*drive));
119 drive->media = ide_disk;
120 drive->select.all = (unit<<4)|0xa0;
122 drive->ready_stat = READY_STAT;
123 drive->bad_wstat = BAD_W_STAT;
124 drive->special.b.recalibrate = 1;
125 drive->special.b.set_geometry = 1;
126 drive->name[0] = 'h';
127 drive->name[1] = 'd';
128 drive->name[2] = 'a' + j;
129 drive->max_failures = IDE_DEFAULT_MAX_FAILURES;
131 INIT_LIST_HEAD(&drive->list);
132 init_completion(&drive->gendev_rel_comp);
136 void ide_remove_port_from_hwgroup(ide_hwif_t *hwif)
138 ide_hwgroup_t *hwgroup = hwif->hwgroup;
140 spin_lock_irq(&ide_lock);
142 * Remove us from the hwgroup, and free
143 * the hwgroup if we were the only member
145 if (hwif->next == hwif) {
146 BUG_ON(hwgroup->hwif != hwif);
149 /* There is another interface in hwgroup.
150 * Unlink us, and set hwgroup->drive and ->hwif to
153 ide_hwif_t *g = hwgroup->hwif;
155 while (g->next != hwif)
157 g->next = hwif->next;
158 if (hwgroup->hwif == hwif) {
159 /* Chose a random hwif for hwgroup->hwif.
160 * It's guaranteed that there are no drives
161 * left in the hwgroup.
163 BUG_ON(hwgroup->drive != NULL);
166 BUG_ON(hwgroup->hwif == hwif);
168 spin_unlock_irq(&ide_lock);
171 /* Called with ide_lock held. */
172 static void __ide_port_unregister_devices(ide_hwif_t *hwif)
176 for (i = 0; i < MAX_DRIVES; i++) {
177 ide_drive_t *drive = &hwif->drives[i];
179 if (drive->present) {
180 spin_unlock_irq(&ide_lock);
181 device_unregister(&drive->gendev);
182 wait_for_completion(&drive->gendev_rel_comp);
183 spin_lock_irq(&ide_lock);
188 void ide_port_unregister_devices(ide_hwif_t *hwif)
190 mutex_lock(&ide_cfg_mtx);
191 spin_lock_irq(&ide_lock);
192 __ide_port_unregister_devices(hwif);
194 ide_port_init_devices_data(hwif);
195 spin_unlock_irq(&ide_lock);
196 mutex_unlock(&ide_cfg_mtx);
198 EXPORT_SYMBOL_GPL(ide_port_unregister_devices);
201 * ide_unregister - free an IDE interface
202 * @hwif: IDE interface
204 * Perform the final unregister of an IDE interface. At the moment
205 * we don't refcount interfaces so this will also get split up.
208 * The caller must not hold the IDE locks
209 * The drive present/vanishing is not yet properly locked
210 * Take care with the callbacks. These have been split to avoid
211 * deadlocking the IDE layer. The shutdown callback is called
212 * before we take the lock and free resources. It is up to the
213 * caller to be sure there is no pending I/O here, and that
214 * the interface will not be reopened (present/vanishing locking
215 * isn't yet done BTW). After we commit to the final kill we
216 * call the cleanup callback with the ide locks held.
218 * Unregister restores the hwif structures to the default state.
219 * This is raving bonkers.
222 void ide_unregister(ide_hwif_t *hwif)
225 ide_hwgroup_t *hwgroup;
228 BUG_ON(in_interrupt());
229 BUG_ON(irqs_disabled());
231 mutex_lock(&ide_cfg_mtx);
233 spin_lock_irq(&ide_lock);
235 __ide_port_unregister_devices(hwif);
238 spin_unlock_irq(&ide_lock);
240 ide_proc_unregister_port(hwif);
242 hwgroup = hwif->hwgroup;
244 * free the irq if we were the only hwif using it
248 if (g->irq == hwif->irq)
251 } while (g != hwgroup->hwif);
253 free_irq(hwif->irq, hwgroup);
255 ide_remove_port_from_hwgroup(hwif);
257 device_unregister(hwif->portdev);
258 device_unregister(&hwif->gendev);
259 wait_for_completion(&hwif->gendev_rel_comp);
262 * Remove us from the kernel's knowledge
264 blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS);
265 kfree(hwif->sg_table);
266 unregister_blkdev(hwif->major, hwif->name);
269 ide_release_dma_engine(hwif);
271 spin_lock_irq(&ide_lock);
272 /* restore hwif data to pristine status */
273 ide_init_port_data(hwif, hwif->index);
274 spin_unlock_irq(&ide_lock);
276 mutex_unlock(&ide_cfg_mtx);
279 EXPORT_SYMBOL(ide_unregister);
281 void ide_init_port_hw(ide_hwif_t *hwif, hw_regs_t *hw)
283 memcpy(&hwif->io_ports, &hw->io_ports, sizeof(hwif->io_ports));
285 hwif->chipset = hw->chipset;
287 hwif->gendev.parent = hw->parent ? hw->parent : hw->dev;
288 hwif->ack_intr = hw->ack_intr;
292 * Locks for IDE setting functionality
295 DEFINE_MUTEX(ide_setting_mtx);
297 EXPORT_SYMBOL_GPL(ide_setting_mtx);
300 * ide_spin_wait_hwgroup - wait for group
301 * @drive: drive in the group
303 * Wait for an IDE device group to go non busy and then return
304 * holding the ide_lock which guards the hwgroup->busy status
305 * and right to use it.
308 int ide_spin_wait_hwgroup (ide_drive_t *drive)
310 ide_hwgroup_t *hwgroup = HWGROUP(drive);
311 unsigned long timeout = jiffies + (3 * HZ);
313 spin_lock_irq(&ide_lock);
315 while (hwgroup->busy) {
316 unsigned long lflags;
317 spin_unlock_irq(&ide_lock);
318 local_irq_set(lflags);
319 if (time_after(jiffies, timeout)) {
320 local_irq_restore(lflags);
321 printk(KERN_ERR "%s: channel busy\n", drive->name);
324 local_irq_restore(lflags);
325 spin_lock_irq(&ide_lock);
330 EXPORT_SYMBOL(ide_spin_wait_hwgroup);
332 int set_io_32bit(ide_drive_t *drive, int arg)
334 if (drive->no_io_32bit)
337 if (arg < 0 || arg > 1 + (SUPPORT_VLB_SYNC << 1))
340 if (ide_spin_wait_hwgroup(drive))
343 drive->io_32bit = arg;
345 spin_unlock_irq(&ide_lock);
350 static int set_ksettings(ide_drive_t *drive, int arg)
352 if (arg < 0 || arg > 1)
355 if (ide_spin_wait_hwgroup(drive))
357 drive->keep_settings = arg;
358 spin_unlock_irq(&ide_lock);
363 int set_using_dma(ide_drive_t *drive, int arg)
365 #ifdef CONFIG_BLK_DEV_IDEDMA
366 ide_hwif_t *hwif = drive->hwif;
369 if (arg < 0 || arg > 1)
372 if (!drive->id || !(drive->id->capability & 1))
375 if (hwif->dma_ops == NULL)
379 if (ide_spin_wait_hwgroup(drive))
382 * set ->busy flag, unlock and let it ride
384 hwif->hwgroup->busy = 1;
385 spin_unlock_irq(&ide_lock);
390 if (ide_set_dma(drive))
396 * lock, clear ->busy flag and unlock before leaving
398 spin_lock_irq(&ide_lock);
399 hwif->hwgroup->busy = 0;
400 spin_unlock_irq(&ide_lock);
404 if (arg < 0 || arg > 1)
411 int set_pio_mode(ide_drive_t *drive, int arg)
414 ide_hwif_t *hwif = drive->hwif;
415 const struct ide_port_ops *port_ops = hwif->port_ops;
417 if (arg < 0 || arg > 255)
420 if (port_ops == NULL || port_ops->set_pio_mode == NULL ||
421 (hwif->host_flags & IDE_HFLAG_NO_SET_MODE))
424 if (drive->special.b.set_tune)
427 rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
428 rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
430 drive->tune_req = (u8) arg;
431 drive->special.b.set_tune = 1;
433 blk_execute_rq(drive->queue, NULL, rq, 0);
439 static int set_unmaskirq(ide_drive_t *drive, int arg)
441 if (drive->no_unmask)
444 if (arg < 0 || arg > 1)
447 if (ide_spin_wait_hwgroup(drive))
450 spin_unlock_irq(&ide_lock);
455 static int generic_ide_suspend(struct device *dev, pm_message_t mesg)
457 ide_drive_t *drive = dev->driver_data;
458 ide_hwif_t *hwif = HWIF(drive);
460 struct request_pm_state rqpm;
464 /* Call ACPI _GTM only once */
465 if (!(drive->dn % 2))
466 ide_acpi_get_timing(hwif);
468 memset(&rqpm, 0, sizeof(rqpm));
469 memset(&args, 0, sizeof(args));
470 rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
471 rq->cmd_type = REQ_TYPE_PM_SUSPEND;
474 rqpm.pm_step = ide_pm_state_start_suspend;
475 if (mesg.event == PM_EVENT_PRETHAW)
476 mesg.event = PM_EVENT_FREEZE;
477 rqpm.pm_state = mesg.event;
479 ret = blk_execute_rq(drive->queue, NULL, rq, 0);
481 /* only call ACPI _PS3 after both drivers are suspended */
482 if (!ret && (((drive->dn % 2) && hwif->drives[0].present
483 && hwif->drives[1].present)
484 || !hwif->drives[0].present
485 || !hwif->drives[1].present))
486 ide_acpi_set_state(hwif, 0);
490 static int generic_ide_resume(struct device *dev)
492 ide_drive_t *drive = dev->driver_data;
493 ide_hwif_t *hwif = HWIF(drive);
495 struct request_pm_state rqpm;
499 /* Call ACPI _STM only once */
500 if (!(drive->dn % 2)) {
501 ide_acpi_set_state(hwif, 1);
502 ide_acpi_push_timing(hwif);
505 ide_acpi_exec_tfs(drive);
507 memset(&rqpm, 0, sizeof(rqpm));
508 memset(&args, 0, sizeof(args));
509 rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
510 rq->cmd_type = REQ_TYPE_PM_RESUME;
511 rq->cmd_flags |= REQ_PREEMPT;
514 rqpm.pm_step = ide_pm_state_start_resume;
515 rqpm.pm_state = PM_EVENT_ON;
517 err = blk_execute_rq(drive->queue, NULL, rq, 1);
520 if (err == 0 && dev->driver) {
521 ide_driver_t *drv = to_ide_driver(dev->driver);
530 static int generic_drive_reset(ide_drive_t *drive)
535 rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
536 rq->cmd_type = REQ_TYPE_SPECIAL;
538 rq->cmd[0] = REQ_DRIVE_RESET;
539 rq->cmd_flags |= REQ_SOFTBARRIER;
540 if (blk_execute_rq(drive->queue, NULL, rq, 1))
546 int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev,
547 unsigned int cmd, unsigned long arg)
551 void __user *p = (void __user *)arg;
552 int err = 0, (*setfunc)(ide_drive_t *, int);
556 case HDIO_GET_32BIT: val = &drive->io_32bit; goto read_val;
557 case HDIO_GET_KEEPSETTINGS: val = &drive->keep_settings; goto read_val;
558 case HDIO_GET_UNMASKINTR: val = &drive->unmask; goto read_val;
559 case HDIO_GET_DMA: val = &drive->using_dma; goto read_val;
560 case HDIO_SET_32BIT: setfunc = set_io_32bit; goto set_val;
561 case HDIO_SET_KEEPSETTINGS: setfunc = set_ksettings; goto set_val;
562 case HDIO_SET_PIO_MODE: setfunc = set_pio_mode; goto set_val;
563 case HDIO_SET_UNMASKINTR: setfunc = set_unmaskirq; goto set_val;
564 case HDIO_SET_DMA: setfunc = set_using_dma; goto set_val;
568 case HDIO_OBSOLETE_IDENTITY:
569 case HDIO_GET_IDENTITY:
570 if (bdev != bdev->bd_contains)
572 if (drive->id_read == 0)
574 if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142))
579 return put_user(drive->dsc_overlap << IDE_NICE_DSC_OVERLAP |
580 drive->atapi_overlap << IDE_NICE_ATAPI_OVERLAP |
581 drive->nice1 << IDE_NICE_1,
582 (long __user *) arg);
583 #ifdef CONFIG_IDE_TASK_IOCTL
584 case HDIO_DRIVE_TASKFILE:
585 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
587 switch(drive->media) {
589 return ide_taskfile_ioctl(drive, cmd, arg);
593 #endif /* CONFIG_IDE_TASK_IOCTL */
596 if (!capable(CAP_SYS_RAWIO))
598 return ide_cmd_ioctl(drive, cmd, arg);
600 case HDIO_DRIVE_TASK:
601 if (!capable(CAP_SYS_RAWIO))
603 return ide_task_ioctl(drive, cmd, arg);
605 if (!capable(CAP_SYS_ADMIN)) return -EACCES;
606 if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1))))
608 drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1;
609 drv = *(ide_driver_t **)bdev->bd_disk->private_data;
610 if (drive->dsc_overlap && !drv->supports_dsc_overlap) {
611 drive->dsc_overlap = 0;
614 drive->nice1 = (arg >> IDE_NICE_1) & 1;
616 case HDIO_DRIVE_RESET:
617 if (!capable(CAP_SYS_ADMIN))
620 return generic_drive_reset(drive);
622 case HDIO_GET_BUSSTATE:
623 if (!capable(CAP_SYS_ADMIN))
625 if (put_user(HWIF(drive)->bus_state, (long __user *)arg))
629 case HDIO_SET_BUSSTATE:
630 if (!capable(CAP_SYS_ADMIN))
638 mutex_lock(&ide_setting_mtx);
639 spin_lock_irqsave(&ide_lock, flags);
641 spin_unlock_irqrestore(&ide_lock, flags);
642 mutex_unlock(&ide_setting_mtx);
643 return err >= 0 ? put_user(err, (long __user *)arg) : err;
646 if (bdev != bdev->bd_contains)
649 if (!capable(CAP_SYS_ADMIN))
652 mutex_lock(&ide_setting_mtx);
653 err = setfunc(drive, arg);
654 mutex_unlock(&ide_setting_mtx);
660 EXPORT_SYMBOL(generic_ide_ioctl);
662 static int ide_bus_match(struct device *dev, struct device_driver *drv)
667 static char *media_string(ide_drive_t *drive)
669 switch (drive->media) {
685 static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf)
687 ide_drive_t *drive = to_ide_device(dev);
688 return sprintf(buf, "%s\n", media_string(drive));
691 static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf)
693 ide_drive_t *drive = to_ide_device(dev);
694 return sprintf(buf, "%s\n", drive->name);
697 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
699 ide_drive_t *drive = to_ide_device(dev);
700 return sprintf(buf, "ide:m-%s\n", media_string(drive));
703 static ssize_t model_show(struct device *dev, struct device_attribute *attr,
706 ide_drive_t *drive = to_ide_device(dev);
707 return sprintf(buf, "%s\n", drive->id->model);
710 static ssize_t firmware_show(struct device *dev, struct device_attribute *attr,
713 ide_drive_t *drive = to_ide_device(dev);
714 return sprintf(buf, "%s\n", drive->id->fw_rev);
717 static ssize_t serial_show(struct device *dev, struct device_attribute *attr,
720 ide_drive_t *drive = to_ide_device(dev);
721 return sprintf(buf, "%s\n", drive->id->serial_no);
724 static struct device_attribute ide_dev_attrs[] = {
726 __ATTR_RO(drivename),
730 __ATTR(serial, 0400, serial_show, NULL),
734 static int ide_uevent(struct device *dev, struct kobj_uevent_env *env)
736 ide_drive_t *drive = to_ide_device(dev);
738 add_uevent_var(env, "MEDIA=%s", media_string(drive));
739 add_uevent_var(env, "DRIVENAME=%s", drive->name);
740 add_uevent_var(env, "MODALIAS=ide:m-%s", media_string(drive));
744 static int generic_ide_probe(struct device *dev)
746 ide_drive_t *drive = to_ide_device(dev);
747 ide_driver_t *drv = to_ide_driver(dev->driver);
749 return drv->probe ? drv->probe(drive) : -ENODEV;
752 static int generic_ide_remove(struct device *dev)
754 ide_drive_t *drive = to_ide_device(dev);
755 ide_driver_t *drv = to_ide_driver(dev->driver);
763 static void generic_ide_shutdown(struct device *dev)
765 ide_drive_t *drive = to_ide_device(dev);
766 ide_driver_t *drv = to_ide_driver(dev->driver);
768 if (dev->driver && drv->shutdown)
769 drv->shutdown(drive);
772 struct bus_type ide_bus_type = {
774 .match = ide_bus_match,
775 .uevent = ide_uevent,
776 .probe = generic_ide_probe,
777 .remove = generic_ide_remove,
778 .shutdown = generic_ide_shutdown,
779 .dev_attrs = ide_dev_attrs,
780 .suspend = generic_ide_suspend,
781 .resume = generic_ide_resume,
784 EXPORT_SYMBOL_GPL(ide_bus_type);
787 EXPORT_SYMBOL_GPL(ide_vlb_clk);
789 module_param_named(vlb_clock, ide_vlb_clk, int, 0);
790 MODULE_PARM_DESC(vlb_clock, "VLB clock frequency (in MHz)");
793 EXPORT_SYMBOL_GPL(ide_pci_clk);
795 module_param_named(pci_clock, ide_pci_clk, int, 0);
796 MODULE_PARM_DESC(pci_clock, "PCI bus clock frequency (in MHz)");
798 static int ide_set_dev_param_mask(const char *s, struct kernel_param *kp)
801 unsigned int *dev_param_mask = (unsigned int *)kp->arg;
803 if (sscanf(s, "%d.%d:%d", &a, &b, &j) != 3 &&
804 sscanf(s, "%d.%d", &a, &b) != 2)
807 i = a * MAX_DRIVES + b;
809 if (i >= MAX_HWIFS * MAX_DRIVES || j < 0 || j > 1)
813 *dev_param_mask |= (1 << i);
815 *dev_param_mask &= (1 << i);
820 static unsigned int ide_nodma;
822 module_param_call(nodma, ide_set_dev_param_mask, NULL, &ide_nodma, 0);
823 MODULE_PARM_DESC(nodma, "disallow DMA for a device");
825 static unsigned int ide_noflush;
827 module_param_call(noflush, ide_set_dev_param_mask, NULL, &ide_noflush, 0);
828 MODULE_PARM_DESC(noflush, "disable flush requests for a device");
830 static unsigned int ide_noprobe;
832 module_param_call(noprobe, ide_set_dev_param_mask, NULL, &ide_noprobe, 0);
833 MODULE_PARM_DESC(noprobe, "skip probing for a device");
835 static unsigned int ide_nowerr;
837 module_param_call(nowerr, ide_set_dev_param_mask, NULL, &ide_nowerr, 0);
838 MODULE_PARM_DESC(nowerr, "ignore the WRERR_STAT bit for a device");
840 static unsigned int ide_cdroms;
842 module_param_call(cdrom, ide_set_dev_param_mask, NULL, &ide_cdroms, 0);
843 MODULE_PARM_DESC(cdrom, "force device as a CD-ROM");
851 static unsigned int ide_disks;
852 static struct chs_geom ide_disks_chs[MAX_HWIFS * MAX_DRIVES];
854 static int ide_set_disk_chs(const char *str, struct kernel_param *kp)
856 int a, b, c = 0, h = 0, s = 0, i, j = 1;
858 if (sscanf(str, "%d.%d:%d,%d,%d", &a, &b, &c, &h, &s) != 5 &&
859 sscanf(str, "%d.%d:%d", &a, &b, &j) != 3)
862 i = a * MAX_DRIVES + b;
864 if (i >= MAX_HWIFS * MAX_DRIVES || j < 0 || j > 1)
867 if (c > INT_MAX || h > 255 || s > 255)
871 ide_disks |= (1 << i);
873 ide_disks &= (1 << i);
875 ide_disks_chs[i].cyl = c;
876 ide_disks_chs[i].head = h;
877 ide_disks_chs[i].sect = s;
882 module_param_call(chs, ide_set_disk_chs, NULL, NULL, 0);
883 MODULE_PARM_DESC(chs, "force device as a disk (using CHS)");
885 static void ide_dev_apply_params(ide_drive_t *drive)
887 int i = drive->hwif->index * MAX_DRIVES + drive->select.b.unit;
889 if (ide_nodma & (1 << i)) {
890 printk(KERN_INFO "ide: disallowing DMA for %s\n", drive->name);
893 if (ide_noflush & (1 << i)) {
894 printk(KERN_INFO "ide: disabling flush requests for %s\n",
898 if (ide_noprobe & (1 << i)) {
899 printk(KERN_INFO "ide: skipping probe for %s\n", drive->name);
902 if (ide_nowerr & (1 << i)) {
903 printk(KERN_INFO "ide: ignoring the WRERR_STAT bit for %s\n",
905 drive->bad_wstat = BAD_R_STAT;
907 if (ide_cdroms & (1 << i)) {
908 printk(KERN_INFO "ide: forcing %s as a CD-ROM\n", drive->name);
910 drive->media = ide_cdrom;
911 /* an ATAPI device ignores DRDY */
912 drive->ready_stat = 0;
914 if (ide_disks & (1 << i)) {
915 drive->cyl = drive->bios_cyl = ide_disks_chs[i].cyl;
916 drive->head = drive->bios_head = ide_disks_chs[i].head;
917 drive->sect = drive->bios_sect = ide_disks_chs[i].sect;
918 drive->forced_geom = 1;
919 printk(KERN_INFO "ide: forcing %s as a disk (%d/%d/%d)\n",
921 drive->cyl, drive->head, drive->sect);
923 drive->media = ide_disk;
924 drive->ready_stat = READY_STAT;
928 static unsigned int ide_ignore_cable;
930 static int ide_set_ignore_cable(const char *s, struct kernel_param *kp)
934 if (sscanf(s, "%d:%d", &i, &j) != 2 && sscanf(s, "%d", &i) != 1)
937 if (i >= MAX_HWIFS || j < 0 || j > 1)
941 ide_ignore_cable |= (1 << i);
943 ide_ignore_cable &= (1 << i);
948 module_param_call(ignore_cable, ide_set_ignore_cable, NULL, NULL, 0);
949 MODULE_PARM_DESC(ignore_cable, "ignore cable detection");
951 void ide_port_apply_params(ide_hwif_t *hwif)
955 if (ide_ignore_cable & (1 << hwif->index)) {
956 printk(KERN_INFO "ide: ignoring cable detection for %s\n",
958 hwif->cbl = ATA_CBL_PATA40_SHORT;
961 for (i = 0; i < MAX_DRIVES; i++)
962 ide_dev_apply_params(&hwif->drives[i]);
966 * This is gets invoked once during initialization, to set *everything* up
968 static int __init ide_init(void)
972 printk(KERN_INFO "Uniform Multi-Platform E-IDE driver\n");
974 ret = bus_register(&ide_bus_type);
976 printk(KERN_WARNING "IDE: bus_register error: %d\n", ret);
980 ide_port_class = class_create(THIS_MODULE, "ide_port");
981 if (IS_ERR(ide_port_class)) {
982 ret = PTR_ERR(ide_port_class);
991 bus_unregister(&ide_bus_type);
996 static void __exit ide_exit(void)
1000 class_destroy(ide_port_class);
1002 bus_unregister(&ide_bus_type);
1005 module_init(ide_init);
1006 module_exit(ide_exit);
1008 MODULE_LICENSE("GPL");