2 * Copyright (C) 1994-1998 Linus Torvalds & authors (see below)
3 * Copyright (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 #include <linux/module.h>
48 #include <linux/types.h>
49 #include <linux/string.h>
50 #include <linux/kernel.h>
51 #include <linux/interrupt.h>
52 #include <linux/major.h>
53 #include <linux/errno.h>
54 #include <linux/genhd.h>
55 #include <linux/slab.h>
56 #include <linux/init.h>
57 #include <linux/pci.h>
58 #include <linux/ide.h>
59 #include <linux/hdreg.h>
60 #include <linux/completion.h>
61 #include <linux/device.h>
64 /* default maximum number of failures */
65 #define IDE_DEFAULT_MAX_FAILURES 1
67 struct class *ide_port_class;
69 static const u8 ide_hwif_to_major[] = { IDE0_MAJOR, IDE1_MAJOR,
70 IDE2_MAJOR, IDE3_MAJOR,
71 IDE4_MAJOR, IDE5_MAJOR,
72 IDE6_MAJOR, IDE7_MAJOR,
73 IDE8_MAJOR, IDE9_MAJOR };
75 DEFINE_MUTEX(ide_cfg_mtx);
77 __cacheline_aligned_in_smp DEFINE_SPINLOCK(ide_lock);
78 EXPORT_SYMBOL(ide_lock);
80 static void ide_port_init_devices_data(ide_hwif_t *);
83 * Do not even *think* about calling this!
85 void ide_init_port_data(ide_hwif_t *hwif, unsigned int index)
87 /* bulk initialize hwif & drive info with zeros */
88 memset(hwif, 0, sizeof(ide_hwif_t));
90 /* fill in any non-zero initial values */
92 hwif->major = ide_hwif_to_major[index];
97 hwif->name[3] = '0' + index;
99 hwif->bus_state = BUSSTATE_ON;
101 init_completion(&hwif->gendev_rel_comp);
103 hwif->tp_ops = &default_tp_ops;
105 ide_port_init_devices_data(hwif);
108 static void ide_port_init_devices_data(ide_hwif_t *hwif)
112 for (unit = 0; unit < MAX_DRIVES; ++unit) {
113 ide_drive_t *drive = &hwif->drives[unit];
114 u8 j = (hwif->index * MAX_DRIVES) + unit;
116 memset(drive, 0, sizeof(*drive));
118 drive->media = ide_disk;
119 drive->select.all = (unit<<4)|0xa0;
121 drive->ready_stat = ATA_DRDY;
122 drive->bad_wstat = BAD_W_STAT;
123 drive->special.b.recalibrate = 1;
124 drive->special.b.set_geometry = 1;
125 drive->name[0] = 'h';
126 drive->name[1] = 'd';
127 drive->name[2] = 'a' + j;
128 drive->max_failures = IDE_DEFAULT_MAX_FAILURES;
130 INIT_LIST_HEAD(&drive->list);
131 init_completion(&drive->gendev_rel_comp);
135 /* Called with ide_lock held. */
136 static void __ide_port_unregister_devices(ide_hwif_t *hwif)
140 for (i = 0; i < MAX_DRIVES; i++) {
141 ide_drive_t *drive = &hwif->drives[i];
143 if (drive->present) {
144 spin_unlock_irq(&ide_lock);
145 device_unregister(&drive->gendev);
146 wait_for_completion(&drive->gendev_rel_comp);
147 spin_lock_irq(&ide_lock);
152 void ide_port_unregister_devices(ide_hwif_t *hwif)
154 mutex_lock(&ide_cfg_mtx);
155 spin_lock_irq(&ide_lock);
156 __ide_port_unregister_devices(hwif);
158 ide_port_init_devices_data(hwif);
159 spin_unlock_irq(&ide_lock);
160 mutex_unlock(&ide_cfg_mtx);
162 EXPORT_SYMBOL_GPL(ide_port_unregister_devices);
165 * ide_unregister - free an IDE interface
166 * @hwif: IDE interface
168 * Perform the final unregister of an IDE interface. At the moment
169 * we don't refcount interfaces so this will also get split up.
172 * The caller must not hold the IDE locks
173 * The drive present/vanishing is not yet properly locked
174 * Take care with the callbacks. These have been split to avoid
175 * deadlocking the IDE layer. The shutdown callback is called
176 * before we take the lock and free resources. It is up to the
177 * caller to be sure there is no pending I/O here, and that
178 * the interface will not be reopened (present/vanishing locking
179 * isn't yet done BTW). After we commit to the final kill we
180 * call the cleanup callback with the ide locks held.
182 * Unregister restores the hwif structures to the default state.
183 * This is raving bonkers.
186 void ide_unregister(ide_hwif_t *hwif)
189 ide_hwgroup_t *hwgroup;
192 BUG_ON(in_interrupt());
193 BUG_ON(irqs_disabled());
195 mutex_lock(&ide_cfg_mtx);
197 spin_lock_irq(&ide_lock);
199 __ide_port_unregister_devices(hwif);
202 spin_unlock_irq(&ide_lock);
204 ide_proc_unregister_port(hwif);
206 hwgroup = hwif->hwgroup;
208 * free the irq if we were the only hwif using it
212 if (g->irq == hwif->irq)
215 } while (g != hwgroup->hwif);
217 free_irq(hwif->irq, hwgroup);
219 ide_remove_port_from_hwgroup(hwif);
221 device_unregister(hwif->portdev);
222 device_unregister(&hwif->gendev);
223 wait_for_completion(&hwif->gendev_rel_comp);
226 * Remove us from the kernel's knowledge
228 blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS);
229 kfree(hwif->sg_table);
230 unregister_blkdev(hwif->major, hwif->name);
233 ide_release_dma_engine(hwif);
235 mutex_unlock(&ide_cfg_mtx);
238 void ide_init_port_hw(ide_hwif_t *hwif, hw_regs_t *hw)
240 memcpy(&hwif->io_ports, &hw->io_ports, sizeof(hwif->io_ports));
242 hwif->chipset = hw->chipset;
244 hwif->gendev.parent = hw->parent ? hw->parent : hw->dev;
245 hwif->ack_intr = hw->ack_intr;
246 hwif->config_data = hw->config;
250 * Locks for IDE setting functionality
253 DEFINE_MUTEX(ide_setting_mtx);
255 EXPORT_SYMBOL_GPL(ide_setting_mtx);
258 * ide_spin_wait_hwgroup - wait for group
259 * @drive: drive in the group
261 * Wait for an IDE device group to go non busy and then return
262 * holding the ide_lock which guards the hwgroup->busy status
263 * and right to use it.
266 int ide_spin_wait_hwgroup (ide_drive_t *drive)
268 ide_hwgroup_t *hwgroup = HWGROUP(drive);
269 unsigned long timeout = jiffies + (3 * HZ);
271 spin_lock_irq(&ide_lock);
273 while (hwgroup->busy) {
274 unsigned long lflags;
275 spin_unlock_irq(&ide_lock);
276 local_irq_set(lflags);
277 if (time_after(jiffies, timeout)) {
278 local_irq_restore(lflags);
279 printk(KERN_ERR "%s: channel busy\n", drive->name);
282 local_irq_restore(lflags);
283 spin_lock_irq(&ide_lock);
288 EXPORT_SYMBOL(ide_spin_wait_hwgroup);
290 ide_devset_get(io_32bit, io_32bit);
292 int set_io_32bit(ide_drive_t *drive, int arg)
294 if (drive->no_io_32bit)
297 if (arg < 0 || arg > 1 + (SUPPORT_VLB_SYNC << 1))
300 if (ide_spin_wait_hwgroup(drive))
303 drive->io_32bit = arg;
305 spin_unlock_irq(&ide_lock);
310 ide_devset_get(ksettings, keep_settings);
312 int set_ksettings(ide_drive_t *drive, int arg)
314 if (arg < 0 || arg > 1)
317 if (ide_spin_wait_hwgroup(drive))
319 drive->keep_settings = arg;
320 spin_unlock_irq(&ide_lock);
325 ide_devset_get(using_dma, using_dma);
327 int set_using_dma(ide_drive_t *drive, int arg)
329 #ifdef CONFIG_BLK_DEV_IDEDMA
330 ide_hwif_t *hwif = drive->hwif;
333 if (arg < 0 || arg > 1)
336 if (ata_id_has_dma(drive->id) == 0)
339 if (hwif->dma_ops == NULL)
343 if (ide_spin_wait_hwgroup(drive))
346 * set ->busy flag, unlock and let it ride
348 hwif->hwgroup->busy = 1;
349 spin_unlock_irq(&ide_lock);
354 if (ide_set_dma(drive))
360 * lock, clear ->busy flag and unlock before leaving
362 spin_lock_irq(&ide_lock);
363 hwif->hwgroup->busy = 0;
364 spin_unlock_irq(&ide_lock);
368 if (arg < 0 || arg > 1)
375 int set_pio_mode(ide_drive_t *drive, int arg)
378 ide_hwif_t *hwif = drive->hwif;
379 const struct ide_port_ops *port_ops = hwif->port_ops;
381 if (arg < 0 || arg > 255)
384 if (port_ops == NULL || port_ops->set_pio_mode == NULL ||
385 (hwif->host_flags & IDE_HFLAG_NO_SET_MODE))
388 if (drive->special.b.set_tune)
391 rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
392 rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
394 drive->tune_req = (u8) arg;
395 drive->special.b.set_tune = 1;
397 blk_execute_rq(drive->queue, NULL, rq, 0);
403 ide_devset_get(unmaskirq, unmask);
405 int set_unmaskirq(ide_drive_t *drive, int arg)
407 if (drive->no_unmask)
410 if (arg < 0 || arg > 1)
413 if (ide_spin_wait_hwgroup(drive))
416 spin_unlock_irq(&ide_lock);
421 static int generic_ide_suspend(struct device *dev, pm_message_t mesg)
423 ide_drive_t *drive = dev->driver_data;
424 ide_hwif_t *hwif = HWIF(drive);
426 struct request_pm_state rqpm;
430 /* Call ACPI _GTM only once */
431 if (!(drive->dn % 2))
432 ide_acpi_get_timing(hwif);
434 memset(&rqpm, 0, sizeof(rqpm));
435 memset(&args, 0, sizeof(args));
436 rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
437 rq->cmd_type = REQ_TYPE_PM_SUSPEND;
440 rqpm.pm_step = ide_pm_state_start_suspend;
441 if (mesg.event == PM_EVENT_PRETHAW)
442 mesg.event = PM_EVENT_FREEZE;
443 rqpm.pm_state = mesg.event;
445 ret = blk_execute_rq(drive->queue, NULL, rq, 0);
447 /* only call ACPI _PS3 after both drivers are suspended */
448 if (!ret && (((drive->dn % 2) && hwif->drives[0].present
449 && hwif->drives[1].present)
450 || !hwif->drives[0].present
451 || !hwif->drives[1].present))
452 ide_acpi_set_state(hwif, 0);
456 static int generic_ide_resume(struct device *dev)
458 ide_drive_t *drive = dev->driver_data;
459 ide_hwif_t *hwif = HWIF(drive);
461 struct request_pm_state rqpm;
465 /* Call ACPI _STM only once */
466 if (!(drive->dn % 2)) {
467 ide_acpi_set_state(hwif, 1);
468 ide_acpi_push_timing(hwif);
471 ide_acpi_exec_tfs(drive);
473 memset(&rqpm, 0, sizeof(rqpm));
474 memset(&args, 0, sizeof(args));
475 rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
476 rq->cmd_type = REQ_TYPE_PM_RESUME;
477 rq->cmd_flags |= REQ_PREEMPT;
480 rqpm.pm_step = ide_pm_state_start_resume;
481 rqpm.pm_state = PM_EVENT_ON;
483 err = blk_execute_rq(drive->queue, NULL, rq, 1);
486 if (err == 0 && dev->driver) {
487 ide_driver_t *drv = to_ide_driver(dev->driver);
496 static int generic_drive_reset(ide_drive_t *drive)
501 rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
502 rq->cmd_type = REQ_TYPE_SPECIAL;
504 rq->cmd[0] = REQ_DRIVE_RESET;
505 rq->cmd_flags |= REQ_SOFTBARRIER;
506 if (blk_execute_rq(drive->queue, NULL, rq, 1))
512 static int ide_get_identity_ioctl(ide_drive_t *drive, unsigned int cmd,
516 int size = (cmd == HDIO_GET_IDENTITY) ? (ATA_ID_WORDS * 2) : 142;
519 if (drive->id_read == 0) {
524 id = kmalloc(size, GFP_KERNEL);
530 memcpy(id, drive->id, size);
531 ata_id_to_hd_driveid(id);
533 if (copy_to_user((void __user *)arg, id, size))
541 static int ide_get_nice_ioctl(ide_drive_t *drive, unsigned long arg)
543 return put_user((drive->dsc_overlap << IDE_NICE_DSC_OVERLAP) |
544 (drive->nice1 << IDE_NICE_1), (long __user *)arg);
547 static int ide_set_nice_ioctl(ide_drive_t *drive, unsigned long arg)
549 if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1))))
552 if (((arg >> IDE_NICE_DSC_OVERLAP) & 1) &&
553 (drive->media == ide_disk || drive->media == ide_floppy ||
557 drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1;
558 drive->nice1 = (arg >> IDE_NICE_1) & 1;
563 int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev,
564 unsigned int cmd, unsigned long arg)
567 int err = 0, (*getfunc)(ide_drive_t *), (*setfunc)(ide_drive_t *, int);
570 case HDIO_GET_32BIT: getfunc = get_io_32bit; goto read_val;
571 case HDIO_GET_KEEPSETTINGS: getfunc = get_ksettings; goto read_val;
572 case HDIO_GET_UNMASKINTR: getfunc = get_unmaskirq; goto read_val;
573 case HDIO_GET_DMA: getfunc = get_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 return ide_get_identity_ioctl(drive, cmd, arg);
588 return ide_get_nice_ioctl(drive, arg);
589 #ifdef CONFIG_IDE_TASK_IOCTL
590 case HDIO_DRIVE_TASKFILE:
591 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
593 switch(drive->media) {
595 return ide_taskfile_ioctl(drive, cmd, arg);
599 #endif /* CONFIG_IDE_TASK_IOCTL */
602 if (!capable(CAP_SYS_RAWIO))
604 return ide_cmd_ioctl(drive, cmd, arg);
606 case HDIO_DRIVE_TASK:
607 if (!capable(CAP_SYS_RAWIO))
609 return ide_task_ioctl(drive, cmd, arg);
611 if (!capable(CAP_SYS_ADMIN))
613 return ide_set_nice_ioctl(drive, arg);
614 case HDIO_DRIVE_RESET:
615 if (!capable(CAP_SYS_ADMIN))
618 return generic_drive_reset(drive);
620 case HDIO_GET_BUSSTATE:
621 if (!capable(CAP_SYS_ADMIN))
623 if (put_user(HWIF(drive)->bus_state, (long __user *)arg))
627 case HDIO_SET_BUSSTATE:
628 if (!capable(CAP_SYS_ADMIN))
636 mutex_lock(&ide_setting_mtx);
637 spin_lock_irqsave(&ide_lock, flags);
638 err = getfunc(drive);
639 spin_unlock_irqrestore(&ide_lock, flags);
640 mutex_unlock(&ide_setting_mtx);
641 return err >= 0 ? put_user(err, (long __user *)arg) : err;
644 if (bdev != bdev->bd_contains)
647 if (!capable(CAP_SYS_ADMIN))
650 mutex_lock(&ide_setting_mtx);
651 err = setfunc(drive, arg);
652 mutex_unlock(&ide_setting_mtx);
658 EXPORT_SYMBOL(generic_ide_ioctl);
661 * ide_device_get - get an additional reference to a ide_drive_t
662 * @drive: device to get a reference to
664 * Gets a reference to the ide_drive_t and increments the use count of the
665 * underlying LLDD module.
667 int ide_device_get(ide_drive_t *drive)
669 struct device *host_dev;
670 struct module *module;
672 if (!get_device(&drive->gendev))
675 host_dev = drive->hwif->host->dev[0];
676 module = host_dev ? host_dev->driver->owner : NULL;
678 if (module && !try_module_get(module)) {
679 put_device(&drive->gendev);
685 EXPORT_SYMBOL_GPL(ide_device_get);
688 * ide_device_put - release a reference to a ide_drive_t
689 * @drive: device to release a reference on
691 * Release a reference to the ide_drive_t and decrements the use count of
692 * the underlying LLDD module.
694 void ide_device_put(ide_drive_t *drive)
696 #ifdef CONFIG_MODULE_UNLOAD
697 struct device *host_dev = drive->hwif->host->dev[0];
698 struct module *module = host_dev ? host_dev->driver->owner : NULL;
703 put_device(&drive->gendev);
705 EXPORT_SYMBOL_GPL(ide_device_put);
707 static int ide_bus_match(struct device *dev, struct device_driver *drv)
712 static char *media_string(ide_drive_t *drive)
714 switch (drive->media) {
730 static ssize_t media_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", media_string(drive));
736 static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf)
738 ide_drive_t *drive = to_ide_device(dev);
739 return sprintf(buf, "%s\n", drive->name);
742 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
744 ide_drive_t *drive = to_ide_device(dev);
745 return sprintf(buf, "ide:m-%s\n", media_string(drive));
748 static ssize_t model_show(struct device *dev, struct device_attribute *attr,
751 ide_drive_t *drive = to_ide_device(dev);
752 return sprintf(buf, "%s\n", (char *)&drive->id[ATA_ID_PROD]);
755 static ssize_t firmware_show(struct device *dev, struct device_attribute *attr,
758 ide_drive_t *drive = to_ide_device(dev);
759 return sprintf(buf, "%s\n", (char *)&drive->id[ATA_ID_FW_REV]);
762 static ssize_t serial_show(struct device *dev, struct device_attribute *attr,
765 ide_drive_t *drive = to_ide_device(dev);
766 return sprintf(buf, "%s\n", (char *)&drive->id[ATA_ID_SERNO]);
769 static struct device_attribute ide_dev_attrs[] = {
771 __ATTR_RO(drivename),
775 __ATTR(serial, 0400, serial_show, NULL),
779 static int ide_uevent(struct device *dev, struct kobj_uevent_env *env)
781 ide_drive_t *drive = to_ide_device(dev);
783 add_uevent_var(env, "MEDIA=%s", media_string(drive));
784 add_uevent_var(env, "DRIVENAME=%s", drive->name);
785 add_uevent_var(env, "MODALIAS=ide:m-%s", media_string(drive));
789 static int generic_ide_probe(struct device *dev)
791 ide_drive_t *drive = to_ide_device(dev);
792 ide_driver_t *drv = to_ide_driver(dev->driver);
794 return drv->probe ? drv->probe(drive) : -ENODEV;
797 static int generic_ide_remove(struct device *dev)
799 ide_drive_t *drive = to_ide_device(dev);
800 ide_driver_t *drv = to_ide_driver(dev->driver);
808 static void generic_ide_shutdown(struct device *dev)
810 ide_drive_t *drive = to_ide_device(dev);
811 ide_driver_t *drv = to_ide_driver(dev->driver);
813 if (dev->driver && drv->shutdown)
814 drv->shutdown(drive);
817 struct bus_type ide_bus_type = {
819 .match = ide_bus_match,
820 .uevent = ide_uevent,
821 .probe = generic_ide_probe,
822 .remove = generic_ide_remove,
823 .shutdown = generic_ide_shutdown,
824 .dev_attrs = ide_dev_attrs,
825 .suspend = generic_ide_suspend,
826 .resume = generic_ide_resume,
829 EXPORT_SYMBOL_GPL(ide_bus_type);
832 EXPORT_SYMBOL_GPL(ide_vlb_clk);
834 module_param_named(vlb_clock, ide_vlb_clk, int, 0);
835 MODULE_PARM_DESC(vlb_clock, "VLB clock frequency (in MHz)");
838 EXPORT_SYMBOL_GPL(ide_pci_clk);
840 module_param_named(pci_clock, ide_pci_clk, int, 0);
841 MODULE_PARM_DESC(pci_clock, "PCI bus clock frequency (in MHz)");
843 static int ide_set_dev_param_mask(const char *s, struct kernel_param *kp)
846 unsigned int *dev_param_mask = (unsigned int *)kp->arg;
848 if (sscanf(s, "%d.%d:%d", &a, &b, &j) != 3 &&
849 sscanf(s, "%d.%d", &a, &b) != 2)
852 i = a * MAX_DRIVES + b;
854 if (i >= MAX_HWIFS * MAX_DRIVES || j < 0 || j > 1)
858 *dev_param_mask |= (1 << i);
860 *dev_param_mask &= (1 << i);
865 static unsigned int ide_nodma;
867 module_param_call(nodma, ide_set_dev_param_mask, NULL, &ide_nodma, 0);
868 MODULE_PARM_DESC(nodma, "disallow DMA for a device");
870 static unsigned int ide_noflush;
872 module_param_call(noflush, ide_set_dev_param_mask, NULL, &ide_noflush, 0);
873 MODULE_PARM_DESC(noflush, "disable flush requests for a device");
875 static unsigned int ide_noprobe;
877 module_param_call(noprobe, ide_set_dev_param_mask, NULL, &ide_noprobe, 0);
878 MODULE_PARM_DESC(noprobe, "skip probing for a device");
880 static unsigned int ide_nowerr;
882 module_param_call(nowerr, ide_set_dev_param_mask, NULL, &ide_nowerr, 0);
883 MODULE_PARM_DESC(nowerr, "ignore the ATA_DF bit for a device");
885 static unsigned int ide_cdroms;
887 module_param_call(cdrom, ide_set_dev_param_mask, NULL, &ide_cdroms, 0);
888 MODULE_PARM_DESC(cdrom, "force device as a CD-ROM");
896 static unsigned int ide_disks;
897 static struct chs_geom ide_disks_chs[MAX_HWIFS * MAX_DRIVES];
899 static int ide_set_disk_chs(const char *str, struct kernel_param *kp)
901 int a, b, c = 0, h = 0, s = 0, i, j = 1;
903 if (sscanf(str, "%d.%d:%d,%d,%d", &a, &b, &c, &h, &s) != 5 &&
904 sscanf(str, "%d.%d:%d", &a, &b, &j) != 3)
907 i = a * MAX_DRIVES + b;
909 if (i >= MAX_HWIFS * MAX_DRIVES || j < 0 || j > 1)
912 if (c > INT_MAX || h > 255 || s > 255)
916 ide_disks |= (1 << i);
918 ide_disks &= (1 << i);
920 ide_disks_chs[i].cyl = c;
921 ide_disks_chs[i].head = h;
922 ide_disks_chs[i].sect = s;
927 module_param_call(chs, ide_set_disk_chs, NULL, NULL, 0);
928 MODULE_PARM_DESC(chs, "force device as a disk (using CHS)");
930 static void ide_dev_apply_params(ide_drive_t *drive)
932 int i = drive->hwif->index * MAX_DRIVES + drive->select.b.unit;
934 if (ide_nodma & (1 << i)) {
935 printk(KERN_INFO "ide: disallowing DMA for %s\n", drive->name);
938 if (ide_noflush & (1 << i)) {
939 printk(KERN_INFO "ide: disabling flush requests for %s\n",
943 if (ide_noprobe & (1 << i)) {
944 printk(KERN_INFO "ide: skipping probe for %s\n", drive->name);
947 if (ide_nowerr & (1 << i)) {
948 printk(KERN_INFO "ide: ignoring the ATA_DF bit for %s\n",
950 drive->bad_wstat = BAD_R_STAT;
952 if (ide_cdroms & (1 << i)) {
953 printk(KERN_INFO "ide: forcing %s as a CD-ROM\n", drive->name);
955 drive->media = ide_cdrom;
956 /* an ATAPI device ignores DRDY */
957 drive->ready_stat = 0;
959 if (ide_disks & (1 << i)) {
960 drive->cyl = drive->bios_cyl = ide_disks_chs[i].cyl;
961 drive->head = drive->bios_head = ide_disks_chs[i].head;
962 drive->sect = drive->bios_sect = ide_disks_chs[i].sect;
963 drive->forced_geom = 1;
964 printk(KERN_INFO "ide: forcing %s as a disk (%d/%d/%d)\n",
966 drive->cyl, drive->head, drive->sect);
968 drive->media = ide_disk;
969 drive->ready_stat = ATA_DRDY;
973 static unsigned int ide_ignore_cable;
975 static int ide_set_ignore_cable(const char *s, struct kernel_param *kp)
979 if (sscanf(s, "%d:%d", &i, &j) != 2 && sscanf(s, "%d", &i) != 1)
982 if (i >= MAX_HWIFS || j < 0 || j > 1)
986 ide_ignore_cable |= (1 << i);
988 ide_ignore_cable &= (1 << i);
993 module_param_call(ignore_cable, ide_set_ignore_cable, NULL, NULL, 0);
994 MODULE_PARM_DESC(ignore_cable, "ignore cable detection");
996 void ide_port_apply_params(ide_hwif_t *hwif)
1000 if (ide_ignore_cable & (1 << hwif->index)) {
1001 printk(KERN_INFO "ide: ignoring cable detection for %s\n",
1003 hwif->cbl = ATA_CBL_PATA40_SHORT;
1006 for (i = 0; i < MAX_DRIVES; i++)
1007 ide_dev_apply_params(&hwif->drives[i]);
1011 * This is gets invoked once during initialization, to set *everything* up
1013 static int __init ide_init(void)
1017 printk(KERN_INFO "Uniform Multi-Platform E-IDE driver\n");
1019 ret = bus_register(&ide_bus_type);
1021 printk(KERN_WARNING "IDE: bus_register error: %d\n", ret);
1025 ide_port_class = class_create(THIS_MODULE, "ide_port");
1026 if (IS_ERR(ide_port_class)) {
1027 ret = PTR_ERR(ide_port_class);
1028 goto out_port_class;
1036 bus_unregister(&ide_bus_type);
1041 static void __exit ide_exit(void)
1045 class_destroy(ide_port_class);
1047 bus_unregister(&ide_bus_type);
1050 module_init(ide_init);
1051 module_exit(ide_exit);
1053 MODULE_LICENSE("GPL");