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 init_completion(&hwif->gendev_rel_comp);
101 hwif->tp_ops = &default_tp_ops;
103 ide_port_init_devices_data(hwif);
106 static void ide_port_init_devices_data(ide_hwif_t *hwif)
110 for (unit = 0; unit < MAX_DRIVES; ++unit) {
111 ide_drive_t *drive = &hwif->drives[unit];
112 u8 j = (hwif->index * MAX_DRIVES) + unit;
114 memset(drive, 0, sizeof(*drive));
116 drive->media = ide_disk;
117 drive->select.all = (unit<<4)|0xa0;
119 drive->ready_stat = ATA_DRDY;
120 drive->bad_wstat = BAD_W_STAT;
121 drive->special.b.recalibrate = 1;
122 drive->special.b.set_geometry = 1;
123 drive->name[0] = 'h';
124 drive->name[1] = 'd';
125 drive->name[2] = 'a' + j;
126 drive->max_failures = IDE_DEFAULT_MAX_FAILURES;
128 INIT_LIST_HEAD(&drive->list);
129 init_completion(&drive->gendev_rel_comp);
133 /* Called with ide_lock held. */
134 static void __ide_port_unregister_devices(ide_hwif_t *hwif)
138 for (i = 0; i < MAX_DRIVES; i++) {
139 ide_drive_t *drive = &hwif->drives[i];
141 if (drive->present) {
142 spin_unlock_irq(&ide_lock);
143 device_unregister(&drive->gendev);
144 wait_for_completion(&drive->gendev_rel_comp);
145 spin_lock_irq(&ide_lock);
150 void ide_port_unregister_devices(ide_hwif_t *hwif)
152 mutex_lock(&ide_cfg_mtx);
153 spin_lock_irq(&ide_lock);
154 __ide_port_unregister_devices(hwif);
156 ide_port_init_devices_data(hwif);
157 spin_unlock_irq(&ide_lock);
158 mutex_unlock(&ide_cfg_mtx);
160 EXPORT_SYMBOL_GPL(ide_port_unregister_devices);
163 * ide_unregister - free an IDE interface
164 * @hwif: IDE interface
166 * Perform the final unregister of an IDE interface. At the moment
167 * we don't refcount interfaces so this will also get split up.
170 * The caller must not hold the IDE locks
171 * The drive present/vanishing is not yet properly locked
172 * Take care with the callbacks. These have been split to avoid
173 * deadlocking the IDE layer. The shutdown callback is called
174 * before we take the lock and free resources. It is up to the
175 * caller to be sure there is no pending I/O here, and that
176 * the interface will not be reopened (present/vanishing locking
177 * isn't yet done BTW). After we commit to the final kill we
178 * call the cleanup callback with the ide locks held.
180 * Unregister restores the hwif structures to the default state.
181 * This is raving bonkers.
184 void ide_unregister(ide_hwif_t *hwif)
187 ide_hwgroup_t *hwgroup;
190 BUG_ON(in_interrupt());
191 BUG_ON(irqs_disabled());
193 mutex_lock(&ide_cfg_mtx);
195 spin_lock_irq(&ide_lock);
197 __ide_port_unregister_devices(hwif);
200 spin_unlock_irq(&ide_lock);
202 ide_proc_unregister_port(hwif);
204 hwgroup = hwif->hwgroup;
206 * free the irq if we were the only hwif using it
210 if (g->irq == hwif->irq)
213 } while (g != hwgroup->hwif);
215 free_irq(hwif->irq, hwgroup);
217 ide_remove_port_from_hwgroup(hwif);
219 device_unregister(hwif->portdev);
220 device_unregister(&hwif->gendev);
221 wait_for_completion(&hwif->gendev_rel_comp);
224 * Remove us from the kernel's knowledge
226 blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS);
227 kfree(hwif->sg_table);
228 unregister_blkdev(hwif->major, hwif->name);
231 ide_release_dma_engine(hwif);
233 mutex_unlock(&ide_cfg_mtx);
236 void ide_init_port_hw(ide_hwif_t *hwif, hw_regs_t *hw)
238 memcpy(&hwif->io_ports, &hw->io_ports, sizeof(hwif->io_ports));
240 hwif->chipset = hw->chipset;
242 hwif->gendev.parent = hw->parent ? hw->parent : hw->dev;
243 hwif->ack_intr = hw->ack_intr;
244 hwif->config_data = hw->config;
248 * Locks for IDE setting functionality
251 DEFINE_MUTEX(ide_setting_mtx);
253 EXPORT_SYMBOL_GPL(ide_setting_mtx);
256 * ide_spin_wait_hwgroup - wait for group
257 * @drive: drive in the group
259 * Wait for an IDE device group to go non busy and then return
260 * holding the ide_lock which guards the hwgroup->busy status
261 * and right to use it.
264 int ide_spin_wait_hwgroup (ide_drive_t *drive)
266 ide_hwgroup_t *hwgroup = HWGROUP(drive);
267 unsigned long timeout = jiffies + (3 * HZ);
269 spin_lock_irq(&ide_lock);
271 while (hwgroup->busy) {
272 unsigned long lflags;
273 spin_unlock_irq(&ide_lock);
274 local_irq_set(lflags);
275 if (time_after(jiffies, timeout)) {
276 local_irq_restore(lflags);
277 printk(KERN_ERR "%s: channel busy\n", drive->name);
280 local_irq_restore(lflags);
281 spin_lock_irq(&ide_lock);
286 EXPORT_SYMBOL(ide_spin_wait_hwgroup);
288 ide_devset_get(io_32bit, io_32bit);
290 int set_io_32bit(ide_drive_t *drive, int arg)
292 if (drive->no_io_32bit)
295 if (arg < 0 || arg > 1 + (SUPPORT_VLB_SYNC << 1))
298 if (ide_spin_wait_hwgroup(drive))
301 drive->io_32bit = arg;
303 spin_unlock_irq(&ide_lock);
308 ide_devset_get(ksettings, keep_settings);
310 int set_ksettings(ide_drive_t *drive, int arg)
312 if (arg < 0 || arg > 1)
315 if (ide_spin_wait_hwgroup(drive))
317 drive->keep_settings = arg;
318 spin_unlock_irq(&ide_lock);
323 ide_devset_get(using_dma, using_dma);
325 int set_using_dma(ide_drive_t *drive, int arg)
327 #ifdef CONFIG_BLK_DEV_IDEDMA
328 ide_hwif_t *hwif = drive->hwif;
331 if (arg < 0 || arg > 1)
334 if (ata_id_has_dma(drive->id) == 0)
337 if (hwif->dma_ops == NULL)
341 if (ide_spin_wait_hwgroup(drive))
344 * set ->busy flag, unlock and let it ride
346 hwif->hwgroup->busy = 1;
347 spin_unlock_irq(&ide_lock);
352 if (ide_set_dma(drive))
358 * lock, clear ->busy flag and unlock before leaving
360 spin_lock_irq(&ide_lock);
361 hwif->hwgroup->busy = 0;
362 spin_unlock_irq(&ide_lock);
366 if (arg < 0 || arg > 1)
373 int set_pio_mode(ide_drive_t *drive, int arg)
376 ide_hwif_t *hwif = drive->hwif;
377 const struct ide_port_ops *port_ops = hwif->port_ops;
379 if (arg < 0 || arg > 255)
382 if (port_ops == NULL || port_ops->set_pio_mode == NULL ||
383 (hwif->host_flags & IDE_HFLAG_NO_SET_MODE))
386 if (drive->special.b.set_tune)
389 rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
390 rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
392 drive->tune_req = (u8) arg;
393 drive->special.b.set_tune = 1;
395 blk_execute_rq(drive->queue, NULL, rq, 0);
401 ide_devset_get(unmaskirq, unmask);
403 int set_unmaskirq(ide_drive_t *drive, int arg)
405 if (drive->no_unmask)
408 if (arg < 0 || arg > 1)
411 if (ide_spin_wait_hwgroup(drive))
414 spin_unlock_irq(&ide_lock);
419 static int generic_ide_suspend(struct device *dev, pm_message_t mesg)
421 ide_drive_t *drive = dev->driver_data;
422 ide_hwif_t *hwif = HWIF(drive);
424 struct request_pm_state rqpm;
428 /* Call ACPI _GTM only once */
429 if (!(drive->dn % 2))
430 ide_acpi_get_timing(hwif);
432 memset(&rqpm, 0, sizeof(rqpm));
433 memset(&args, 0, sizeof(args));
434 rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
435 rq->cmd_type = REQ_TYPE_PM_SUSPEND;
438 rqpm.pm_step = ide_pm_state_start_suspend;
439 if (mesg.event == PM_EVENT_PRETHAW)
440 mesg.event = PM_EVENT_FREEZE;
441 rqpm.pm_state = mesg.event;
443 ret = blk_execute_rq(drive->queue, NULL, rq, 0);
445 /* only call ACPI _PS3 after both drivers are suspended */
446 if (!ret && (((drive->dn % 2) && hwif->drives[0].present
447 && hwif->drives[1].present)
448 || !hwif->drives[0].present
449 || !hwif->drives[1].present))
450 ide_acpi_set_state(hwif, 0);
454 static int generic_ide_resume(struct device *dev)
456 ide_drive_t *drive = dev->driver_data;
457 ide_hwif_t *hwif = HWIF(drive);
459 struct request_pm_state rqpm;
463 /* Call ACPI _STM only once */
464 if (!(drive->dn % 2)) {
465 ide_acpi_set_state(hwif, 1);
466 ide_acpi_push_timing(hwif);
469 ide_acpi_exec_tfs(drive);
471 memset(&rqpm, 0, sizeof(rqpm));
472 memset(&args, 0, sizeof(args));
473 rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
474 rq->cmd_type = REQ_TYPE_PM_RESUME;
475 rq->cmd_flags |= REQ_PREEMPT;
478 rqpm.pm_step = ide_pm_state_start_resume;
479 rqpm.pm_state = PM_EVENT_ON;
481 err = blk_execute_rq(drive->queue, NULL, rq, 1);
484 if (err == 0 && dev->driver) {
485 ide_driver_t *drv = to_ide_driver(dev->driver);
494 static int generic_drive_reset(ide_drive_t *drive)
499 rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
500 rq->cmd_type = REQ_TYPE_SPECIAL;
502 rq->cmd[0] = REQ_DRIVE_RESET;
503 rq->cmd_flags |= REQ_SOFTBARRIER;
504 if (blk_execute_rq(drive->queue, NULL, rq, 1))
510 static int ide_get_identity_ioctl(ide_drive_t *drive, unsigned int cmd,
514 int size = (cmd == HDIO_GET_IDENTITY) ? (ATA_ID_WORDS * 2) : 142;
517 if (drive->id_read == 0) {
522 id = kmalloc(size, GFP_KERNEL);
528 memcpy(id, drive->id, size);
529 ata_id_to_hd_driveid(id);
531 if (copy_to_user((void __user *)arg, id, size))
539 static int ide_get_nice_ioctl(ide_drive_t *drive, unsigned long arg)
541 return put_user((drive->dsc_overlap << IDE_NICE_DSC_OVERLAP) |
542 (drive->nice1 << IDE_NICE_1), (long __user *)arg);
545 static int ide_set_nice_ioctl(ide_drive_t *drive, unsigned long arg)
547 if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1))))
550 if (((arg >> IDE_NICE_DSC_OVERLAP) & 1) &&
551 (drive->media == ide_disk || drive->media == ide_floppy ||
555 drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1;
556 drive->nice1 = (arg >> IDE_NICE_1) & 1;
561 int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev,
562 unsigned int cmd, unsigned long arg)
565 int err = 0, (*getfunc)(ide_drive_t *), (*setfunc)(ide_drive_t *, int);
568 case HDIO_GET_32BIT: getfunc = get_io_32bit; goto read_val;
569 case HDIO_GET_KEEPSETTINGS: getfunc = get_ksettings; goto read_val;
570 case HDIO_GET_UNMASKINTR: getfunc = get_unmaskirq; goto read_val;
571 case HDIO_GET_DMA: getfunc = get_using_dma; goto read_val;
572 case HDIO_SET_32BIT: setfunc = set_io_32bit; goto set_val;
573 case HDIO_SET_KEEPSETTINGS: setfunc = set_ksettings; goto set_val;
574 case HDIO_SET_PIO_MODE: setfunc = set_pio_mode; goto set_val;
575 case HDIO_SET_UNMASKINTR: setfunc = set_unmaskirq; goto set_val;
576 case HDIO_SET_DMA: setfunc = set_using_dma; goto set_val;
580 case HDIO_OBSOLETE_IDENTITY:
581 case HDIO_GET_IDENTITY:
582 if (bdev != bdev->bd_contains)
584 return ide_get_identity_ioctl(drive, cmd, arg);
586 return ide_get_nice_ioctl(drive, arg);
587 #ifdef CONFIG_IDE_TASK_IOCTL
588 case HDIO_DRIVE_TASKFILE:
589 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
591 switch(drive->media) {
593 return ide_taskfile_ioctl(drive, cmd, arg);
597 #endif /* CONFIG_IDE_TASK_IOCTL */
600 if (!capable(CAP_SYS_RAWIO))
602 return ide_cmd_ioctl(drive, cmd, arg);
604 case HDIO_DRIVE_TASK:
605 if (!capable(CAP_SYS_RAWIO))
607 return ide_task_ioctl(drive, cmd, arg);
609 if (!capable(CAP_SYS_ADMIN))
611 return ide_set_nice_ioctl(drive, arg);
612 case HDIO_DRIVE_RESET:
613 if (!capable(CAP_SYS_ADMIN))
616 return generic_drive_reset(drive);
618 case HDIO_GET_BUSSTATE:
619 if (!capable(CAP_SYS_ADMIN))
621 if (put_user(BUSSTATE_ON, (long __user *)arg))
625 case HDIO_SET_BUSSTATE:
626 if (!capable(CAP_SYS_ADMIN))
634 mutex_lock(&ide_setting_mtx);
635 spin_lock_irqsave(&ide_lock, flags);
636 err = getfunc(drive);
637 spin_unlock_irqrestore(&ide_lock, flags);
638 mutex_unlock(&ide_setting_mtx);
639 return err >= 0 ? put_user(err, (long __user *)arg) : err;
642 if (bdev != bdev->bd_contains)
645 if (!capable(CAP_SYS_ADMIN))
648 mutex_lock(&ide_setting_mtx);
649 err = setfunc(drive, arg);
650 mutex_unlock(&ide_setting_mtx);
656 EXPORT_SYMBOL(generic_ide_ioctl);
659 * ide_device_get - get an additional reference to a ide_drive_t
660 * @drive: device to get a reference to
662 * Gets a reference to the ide_drive_t and increments the use count of the
663 * underlying LLDD module.
665 int ide_device_get(ide_drive_t *drive)
667 struct device *host_dev;
668 struct module *module;
670 if (!get_device(&drive->gendev))
673 host_dev = drive->hwif->host->dev[0];
674 module = host_dev ? host_dev->driver->owner : NULL;
676 if (module && !try_module_get(module)) {
677 put_device(&drive->gendev);
683 EXPORT_SYMBOL_GPL(ide_device_get);
686 * ide_device_put - release a reference to a ide_drive_t
687 * @drive: device to release a reference on
689 * Release a reference to the ide_drive_t and decrements the use count of
690 * the underlying LLDD module.
692 void ide_device_put(ide_drive_t *drive)
694 #ifdef CONFIG_MODULE_UNLOAD
695 struct device *host_dev = drive->hwif->host->dev[0];
696 struct module *module = host_dev ? host_dev->driver->owner : NULL;
701 put_device(&drive->gendev);
703 EXPORT_SYMBOL_GPL(ide_device_put);
705 static int ide_bus_match(struct device *dev, struct device_driver *drv)
710 static char *media_string(ide_drive_t *drive)
712 switch (drive->media) {
728 static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf)
730 ide_drive_t *drive = to_ide_device(dev);
731 return sprintf(buf, "%s\n", media_string(drive));
734 static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf)
736 ide_drive_t *drive = to_ide_device(dev);
737 return sprintf(buf, "%s\n", drive->name);
740 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
742 ide_drive_t *drive = to_ide_device(dev);
743 return sprintf(buf, "ide:m-%s\n", media_string(drive));
746 static ssize_t model_show(struct device *dev, struct device_attribute *attr,
749 ide_drive_t *drive = to_ide_device(dev);
750 return sprintf(buf, "%s\n", (char *)&drive->id[ATA_ID_PROD]);
753 static ssize_t firmware_show(struct device *dev, struct device_attribute *attr,
756 ide_drive_t *drive = to_ide_device(dev);
757 return sprintf(buf, "%s\n", (char *)&drive->id[ATA_ID_FW_REV]);
760 static ssize_t serial_show(struct device *dev, struct device_attribute *attr,
763 ide_drive_t *drive = to_ide_device(dev);
764 return sprintf(buf, "%s\n", (char *)&drive->id[ATA_ID_SERNO]);
767 static struct device_attribute ide_dev_attrs[] = {
769 __ATTR_RO(drivename),
773 __ATTR(serial, 0400, serial_show, NULL),
777 static int ide_uevent(struct device *dev, struct kobj_uevent_env *env)
779 ide_drive_t *drive = to_ide_device(dev);
781 add_uevent_var(env, "MEDIA=%s", media_string(drive));
782 add_uevent_var(env, "DRIVENAME=%s", drive->name);
783 add_uevent_var(env, "MODALIAS=ide:m-%s", media_string(drive));
787 static int generic_ide_probe(struct device *dev)
789 ide_drive_t *drive = to_ide_device(dev);
790 ide_driver_t *drv = to_ide_driver(dev->driver);
792 return drv->probe ? drv->probe(drive) : -ENODEV;
795 static int generic_ide_remove(struct device *dev)
797 ide_drive_t *drive = to_ide_device(dev);
798 ide_driver_t *drv = to_ide_driver(dev->driver);
806 static void generic_ide_shutdown(struct device *dev)
808 ide_drive_t *drive = to_ide_device(dev);
809 ide_driver_t *drv = to_ide_driver(dev->driver);
811 if (dev->driver && drv->shutdown)
812 drv->shutdown(drive);
815 struct bus_type ide_bus_type = {
817 .match = ide_bus_match,
818 .uevent = ide_uevent,
819 .probe = generic_ide_probe,
820 .remove = generic_ide_remove,
821 .shutdown = generic_ide_shutdown,
822 .dev_attrs = ide_dev_attrs,
823 .suspend = generic_ide_suspend,
824 .resume = generic_ide_resume,
827 EXPORT_SYMBOL_GPL(ide_bus_type);
830 EXPORT_SYMBOL_GPL(ide_vlb_clk);
832 module_param_named(vlb_clock, ide_vlb_clk, int, 0);
833 MODULE_PARM_DESC(vlb_clock, "VLB clock frequency (in MHz)");
836 EXPORT_SYMBOL_GPL(ide_pci_clk);
838 module_param_named(pci_clock, ide_pci_clk, int, 0);
839 MODULE_PARM_DESC(pci_clock, "PCI bus clock frequency (in MHz)");
841 static int ide_set_dev_param_mask(const char *s, struct kernel_param *kp)
844 unsigned int *dev_param_mask = (unsigned int *)kp->arg;
846 if (sscanf(s, "%d.%d:%d", &a, &b, &j) != 3 &&
847 sscanf(s, "%d.%d", &a, &b) != 2)
850 i = a * MAX_DRIVES + b;
852 if (i >= MAX_HWIFS * MAX_DRIVES || j < 0 || j > 1)
856 *dev_param_mask |= (1 << i);
858 *dev_param_mask &= (1 << i);
863 static unsigned int ide_nodma;
865 module_param_call(nodma, ide_set_dev_param_mask, NULL, &ide_nodma, 0);
866 MODULE_PARM_DESC(nodma, "disallow DMA for a device");
868 static unsigned int ide_noflush;
870 module_param_call(noflush, ide_set_dev_param_mask, NULL, &ide_noflush, 0);
871 MODULE_PARM_DESC(noflush, "disable flush requests for a device");
873 static unsigned int ide_noprobe;
875 module_param_call(noprobe, ide_set_dev_param_mask, NULL, &ide_noprobe, 0);
876 MODULE_PARM_DESC(noprobe, "skip probing for a device");
878 static unsigned int ide_nowerr;
880 module_param_call(nowerr, ide_set_dev_param_mask, NULL, &ide_nowerr, 0);
881 MODULE_PARM_DESC(nowerr, "ignore the ATA_DF bit for a device");
883 static unsigned int ide_cdroms;
885 module_param_call(cdrom, ide_set_dev_param_mask, NULL, &ide_cdroms, 0);
886 MODULE_PARM_DESC(cdrom, "force device as a CD-ROM");
894 static unsigned int ide_disks;
895 static struct chs_geom ide_disks_chs[MAX_HWIFS * MAX_DRIVES];
897 static int ide_set_disk_chs(const char *str, struct kernel_param *kp)
899 int a, b, c = 0, h = 0, s = 0, i, j = 1;
901 if (sscanf(str, "%d.%d:%d,%d,%d", &a, &b, &c, &h, &s) != 5 &&
902 sscanf(str, "%d.%d:%d", &a, &b, &j) != 3)
905 i = a * MAX_DRIVES + b;
907 if (i >= MAX_HWIFS * MAX_DRIVES || j < 0 || j > 1)
910 if (c > INT_MAX || h > 255 || s > 255)
914 ide_disks |= (1 << i);
916 ide_disks &= (1 << i);
918 ide_disks_chs[i].cyl = c;
919 ide_disks_chs[i].head = h;
920 ide_disks_chs[i].sect = s;
925 module_param_call(chs, ide_set_disk_chs, NULL, NULL, 0);
926 MODULE_PARM_DESC(chs, "force device as a disk (using CHS)");
928 static void ide_dev_apply_params(ide_drive_t *drive)
930 int i = drive->hwif->index * MAX_DRIVES + drive->select.b.unit;
932 if (ide_nodma & (1 << i)) {
933 printk(KERN_INFO "ide: disallowing DMA for %s\n", drive->name);
936 if (ide_noflush & (1 << i)) {
937 printk(KERN_INFO "ide: disabling flush requests for %s\n",
941 if (ide_noprobe & (1 << i)) {
942 printk(KERN_INFO "ide: skipping probe for %s\n", drive->name);
945 if (ide_nowerr & (1 << i)) {
946 printk(KERN_INFO "ide: ignoring the ATA_DF bit for %s\n",
948 drive->bad_wstat = BAD_R_STAT;
950 if (ide_cdroms & (1 << i)) {
951 printk(KERN_INFO "ide: forcing %s as a CD-ROM\n", drive->name);
953 drive->media = ide_cdrom;
954 /* an ATAPI device ignores DRDY */
955 drive->ready_stat = 0;
957 if (ide_disks & (1 << i)) {
958 drive->cyl = drive->bios_cyl = ide_disks_chs[i].cyl;
959 drive->head = drive->bios_head = ide_disks_chs[i].head;
960 drive->sect = drive->bios_sect = ide_disks_chs[i].sect;
961 drive->forced_geom = 1;
962 printk(KERN_INFO "ide: forcing %s as a disk (%d/%d/%d)\n",
964 drive->cyl, drive->head, drive->sect);
966 drive->media = ide_disk;
967 drive->ready_stat = ATA_DRDY;
971 static unsigned int ide_ignore_cable;
973 static int ide_set_ignore_cable(const char *s, struct kernel_param *kp)
977 if (sscanf(s, "%d:%d", &i, &j) != 2 && sscanf(s, "%d", &i) != 1)
980 if (i >= MAX_HWIFS || j < 0 || j > 1)
984 ide_ignore_cable |= (1 << i);
986 ide_ignore_cable &= (1 << i);
991 module_param_call(ignore_cable, ide_set_ignore_cable, NULL, NULL, 0);
992 MODULE_PARM_DESC(ignore_cable, "ignore cable detection");
994 void ide_port_apply_params(ide_hwif_t *hwif)
998 if (ide_ignore_cable & (1 << hwif->index)) {
999 printk(KERN_INFO "ide: ignoring cable detection for %s\n",
1001 hwif->cbl = ATA_CBL_PATA40_SHORT;
1004 for (i = 0; i < MAX_DRIVES; i++)
1005 ide_dev_apply_params(&hwif->drives[i]);
1009 * This is gets invoked once during initialization, to set *everything* up
1011 static int __init ide_init(void)
1015 printk(KERN_INFO "Uniform Multi-Platform E-IDE driver\n");
1017 ret = bus_register(&ide_bus_type);
1019 printk(KERN_WARNING "IDE: bus_register error: %d\n", ret);
1023 ide_port_class = class_create(THIS_MODULE, "ide_port");
1024 if (IS_ERR(ide_port_class)) {
1025 ret = PTR_ERR(ide_port_class);
1026 goto out_port_class;
1034 bus_unregister(&ide_bus_type);
1039 static void __exit ide_exit(void)
1043 class_destroy(ide_port_class);
1045 bus_unregister(&ide_bus_type);
1048 module_init(ide_init);
1049 module_exit(ide_exit);
1051 MODULE_LICENSE("GPL");