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 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 int set_ksettings(ide_drive_t *drive, int arg)
310 if (arg < 0 || arg > 1)
313 if (ide_spin_wait_hwgroup(drive))
315 drive->keep_settings = arg;
316 spin_unlock_irq(&ide_lock);
321 int set_using_dma(ide_drive_t *drive, int arg)
323 #ifdef CONFIG_BLK_DEV_IDEDMA
324 ide_hwif_t *hwif = drive->hwif;
327 if (arg < 0 || arg > 1)
330 if (ata_id_has_dma(drive->id) == 0)
333 if (hwif->dma_ops == NULL)
337 if (ide_spin_wait_hwgroup(drive))
340 * set ->busy flag, unlock and let it ride
342 hwif->hwgroup->busy = 1;
343 spin_unlock_irq(&ide_lock);
348 if (ide_set_dma(drive))
354 * lock, clear ->busy flag and unlock before leaving
356 spin_lock_irq(&ide_lock);
357 hwif->hwgroup->busy = 0;
358 spin_unlock_irq(&ide_lock);
362 if (arg < 0 || arg > 1)
369 int set_pio_mode(ide_drive_t *drive, int arg)
372 ide_hwif_t *hwif = drive->hwif;
373 const struct ide_port_ops *port_ops = hwif->port_ops;
375 if (arg < 0 || arg > 255)
378 if (port_ops == NULL || port_ops->set_pio_mode == NULL ||
379 (hwif->host_flags & IDE_HFLAG_NO_SET_MODE))
382 if (drive->special.b.set_tune)
385 rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
386 rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
388 drive->tune_req = (u8) arg;
389 drive->special.b.set_tune = 1;
391 blk_execute_rq(drive->queue, NULL, rq, 0);
397 int set_unmaskirq(ide_drive_t *drive, int arg)
399 if (drive->no_unmask)
402 if (arg < 0 || arg > 1)
405 if (ide_spin_wait_hwgroup(drive))
408 spin_unlock_irq(&ide_lock);
413 static int generic_ide_suspend(struct device *dev, pm_message_t mesg)
415 ide_drive_t *drive = dev->driver_data;
416 ide_hwif_t *hwif = HWIF(drive);
418 struct request_pm_state rqpm;
422 /* Call ACPI _GTM only once */
423 if (!(drive->dn % 2))
424 ide_acpi_get_timing(hwif);
426 memset(&rqpm, 0, sizeof(rqpm));
427 memset(&args, 0, sizeof(args));
428 rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
429 rq->cmd_type = REQ_TYPE_PM_SUSPEND;
432 rqpm.pm_step = ide_pm_state_start_suspend;
433 if (mesg.event == PM_EVENT_PRETHAW)
434 mesg.event = PM_EVENT_FREEZE;
435 rqpm.pm_state = mesg.event;
437 ret = blk_execute_rq(drive->queue, NULL, rq, 0);
439 /* only call ACPI _PS3 after both drivers are suspended */
440 if (!ret && (((drive->dn % 2) && hwif->drives[0].present
441 && hwif->drives[1].present)
442 || !hwif->drives[0].present
443 || !hwif->drives[1].present))
444 ide_acpi_set_state(hwif, 0);
448 static int generic_ide_resume(struct device *dev)
450 ide_drive_t *drive = dev->driver_data;
451 ide_hwif_t *hwif = HWIF(drive);
453 struct request_pm_state rqpm;
457 /* Call ACPI _STM only once */
458 if (!(drive->dn % 2)) {
459 ide_acpi_set_state(hwif, 1);
460 ide_acpi_push_timing(hwif);
463 ide_acpi_exec_tfs(drive);
465 memset(&rqpm, 0, sizeof(rqpm));
466 memset(&args, 0, sizeof(args));
467 rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
468 rq->cmd_type = REQ_TYPE_PM_RESUME;
469 rq->cmd_flags |= REQ_PREEMPT;
472 rqpm.pm_step = ide_pm_state_start_resume;
473 rqpm.pm_state = PM_EVENT_ON;
475 err = blk_execute_rq(drive->queue, NULL, rq, 1);
478 if (err == 0 && dev->driver) {
479 ide_driver_t *drv = to_ide_driver(dev->driver);
488 static int generic_drive_reset(ide_drive_t *drive)
493 rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
494 rq->cmd_type = REQ_TYPE_SPECIAL;
496 rq->cmd[0] = REQ_DRIVE_RESET;
497 rq->cmd_flags |= REQ_SOFTBARRIER;
498 if (blk_execute_rq(drive->queue, NULL, rq, 1))
504 static inline void ide_id_to_hd_driveid(u16 *id)
507 /* accessed in struct hd_driveid as 8-bit values */
508 id[ATA_ID_MAX_MULTSECT] = __cpu_to_le16(id[ATA_ID_MAX_MULTSECT]);
509 id[ATA_ID_CAPABILITY] = __cpu_to_le16(id[ATA_ID_CAPABILITY]);
510 id[ATA_ID_OLD_PIO_MODES] = __cpu_to_le16(id[ATA_ID_OLD_PIO_MODES]);
511 id[ATA_ID_OLD_DMA_MODES] = __cpu_to_le16(id[ATA_ID_OLD_DMA_MODES]);
512 id[ATA_ID_MULTSECT] = __cpu_to_le16(id[ATA_ID_MULTSECT]);
514 /* as 32-bit values */
515 *(u32 *)&id[ATA_ID_LBA_CAPACITY] = ata_id_u32(id, ATA_ID_LBA_CAPACITY);
516 *(u32 *)&id[ATA_ID_SPG] = ata_id_u32(id, ATA_ID_SPG);
518 /* as 64-bit value */
519 *(u64 *)&id[ATA_ID_LBA_CAPACITY_2] =
520 ata_id_u64(id, ATA_ID_LBA_CAPACITY_2);
524 static int ide_get_identity_ioctl(ide_drive_t *drive, unsigned int cmd,
528 int size = (cmd == HDIO_GET_IDENTITY) ? (ATA_ID_WORDS * 2) : 142;
531 if (drive->id_read == 0) {
536 id = kmalloc(size, GFP_KERNEL);
542 memcpy(id, drive->id, size);
543 ide_id_to_hd_driveid(id);
545 if (copy_to_user((void __user *)arg, id, size))
553 int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev,
554 unsigned int cmd, unsigned long arg)
558 int err = 0, (*setfunc)(ide_drive_t *, int);
562 case HDIO_GET_32BIT: val = &drive->io_32bit; goto read_val;
563 case HDIO_GET_KEEPSETTINGS: val = &drive->keep_settings; goto read_val;
564 case HDIO_GET_UNMASKINTR: val = &drive->unmask; goto read_val;
565 case HDIO_GET_DMA: val = &drive->using_dma; goto read_val;
566 case HDIO_SET_32BIT: setfunc = set_io_32bit; goto set_val;
567 case HDIO_SET_KEEPSETTINGS: setfunc = set_ksettings; goto set_val;
568 case HDIO_SET_PIO_MODE: setfunc = set_pio_mode; goto set_val;
569 case HDIO_SET_UNMASKINTR: setfunc = set_unmaskirq; goto set_val;
570 case HDIO_SET_DMA: setfunc = set_using_dma; goto set_val;
574 case HDIO_OBSOLETE_IDENTITY:
575 case HDIO_GET_IDENTITY:
576 if (bdev != bdev->bd_contains)
578 return ide_get_identity_ioctl(drive, cmd, arg);
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);
664 * ide_device_get - get an additional reference to a ide_drive_t
665 * @drive: device to get a reference to
667 * Gets a reference to the ide_drive_t and increments the use count of the
668 * underlying LLDD module.
670 int ide_device_get(ide_drive_t *drive)
672 struct device *host_dev;
673 struct module *module;
675 if (!get_device(&drive->gendev))
678 host_dev = drive->hwif->host->dev[0];
679 module = host_dev ? host_dev->driver->owner : NULL;
681 if (module && !try_module_get(module)) {
682 put_device(&drive->gendev);
688 EXPORT_SYMBOL_GPL(ide_device_get);
691 * ide_device_put - release a reference to a ide_drive_t
692 * @drive: device to release a reference on
694 * Release a reference to the ide_drive_t and decrements the use count of
695 * the underlying LLDD module.
697 void ide_device_put(ide_drive_t *drive)
699 #ifdef CONFIG_MODULE_UNLOAD
700 struct device *host_dev = drive->hwif->host->dev[0];
701 struct module *module = host_dev ? host_dev->driver->owner : NULL;
706 put_device(&drive->gendev);
708 EXPORT_SYMBOL_GPL(ide_device_put);
710 static int ide_bus_match(struct device *dev, struct device_driver *drv)
715 static char *media_string(ide_drive_t *drive)
717 switch (drive->media) {
733 static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf)
735 ide_drive_t *drive = to_ide_device(dev);
736 return sprintf(buf, "%s\n", media_string(drive));
739 static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf)
741 ide_drive_t *drive = to_ide_device(dev);
742 return sprintf(buf, "%s\n", drive->name);
745 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
747 ide_drive_t *drive = to_ide_device(dev);
748 return sprintf(buf, "ide:m-%s\n", media_string(drive));
751 static ssize_t model_show(struct device *dev, struct device_attribute *attr,
754 ide_drive_t *drive = to_ide_device(dev);
755 return sprintf(buf, "%s\n", (char *)&drive->id[ATA_ID_PROD]);
758 static ssize_t firmware_show(struct device *dev, struct device_attribute *attr,
761 ide_drive_t *drive = to_ide_device(dev);
762 return sprintf(buf, "%s\n", (char *)&drive->id[ATA_ID_FW_REV]);
765 static ssize_t serial_show(struct device *dev, struct device_attribute *attr,
768 ide_drive_t *drive = to_ide_device(dev);
769 return sprintf(buf, "%s\n", (char *)&drive->id[ATA_ID_SERNO]);
772 static struct device_attribute ide_dev_attrs[] = {
774 __ATTR_RO(drivename),
778 __ATTR(serial, 0400, serial_show, NULL),
782 static int ide_uevent(struct device *dev, struct kobj_uevent_env *env)
784 ide_drive_t *drive = to_ide_device(dev);
786 add_uevent_var(env, "MEDIA=%s", media_string(drive));
787 add_uevent_var(env, "DRIVENAME=%s", drive->name);
788 add_uevent_var(env, "MODALIAS=ide:m-%s", media_string(drive));
792 static int generic_ide_probe(struct device *dev)
794 ide_drive_t *drive = to_ide_device(dev);
795 ide_driver_t *drv = to_ide_driver(dev->driver);
797 return drv->probe ? drv->probe(drive) : -ENODEV;
800 static int generic_ide_remove(struct device *dev)
802 ide_drive_t *drive = to_ide_device(dev);
803 ide_driver_t *drv = to_ide_driver(dev->driver);
811 static void generic_ide_shutdown(struct device *dev)
813 ide_drive_t *drive = to_ide_device(dev);
814 ide_driver_t *drv = to_ide_driver(dev->driver);
816 if (dev->driver && drv->shutdown)
817 drv->shutdown(drive);
820 struct bus_type ide_bus_type = {
822 .match = ide_bus_match,
823 .uevent = ide_uevent,
824 .probe = generic_ide_probe,
825 .remove = generic_ide_remove,
826 .shutdown = generic_ide_shutdown,
827 .dev_attrs = ide_dev_attrs,
828 .suspend = generic_ide_suspend,
829 .resume = generic_ide_resume,
832 EXPORT_SYMBOL_GPL(ide_bus_type);
835 EXPORT_SYMBOL_GPL(ide_vlb_clk);
837 module_param_named(vlb_clock, ide_vlb_clk, int, 0);
838 MODULE_PARM_DESC(vlb_clock, "VLB clock frequency (in MHz)");
841 EXPORT_SYMBOL_GPL(ide_pci_clk);
843 module_param_named(pci_clock, ide_pci_clk, int, 0);
844 MODULE_PARM_DESC(pci_clock, "PCI bus clock frequency (in MHz)");
846 static int ide_set_dev_param_mask(const char *s, struct kernel_param *kp)
849 unsigned int *dev_param_mask = (unsigned int *)kp->arg;
851 if (sscanf(s, "%d.%d:%d", &a, &b, &j) != 3 &&
852 sscanf(s, "%d.%d", &a, &b) != 2)
855 i = a * MAX_DRIVES + b;
857 if (i >= MAX_HWIFS * MAX_DRIVES || j < 0 || j > 1)
861 *dev_param_mask |= (1 << i);
863 *dev_param_mask &= (1 << i);
868 static unsigned int ide_nodma;
870 module_param_call(nodma, ide_set_dev_param_mask, NULL, &ide_nodma, 0);
871 MODULE_PARM_DESC(nodma, "disallow DMA for a device");
873 static unsigned int ide_noflush;
875 module_param_call(noflush, ide_set_dev_param_mask, NULL, &ide_noflush, 0);
876 MODULE_PARM_DESC(noflush, "disable flush requests for a device");
878 static unsigned int ide_noprobe;
880 module_param_call(noprobe, ide_set_dev_param_mask, NULL, &ide_noprobe, 0);
881 MODULE_PARM_DESC(noprobe, "skip probing for a device");
883 static unsigned int ide_nowerr;
885 module_param_call(nowerr, ide_set_dev_param_mask, NULL, &ide_nowerr, 0);
886 MODULE_PARM_DESC(nowerr, "ignore the ATA_DF bit for a device");
888 static unsigned int ide_cdroms;
890 module_param_call(cdrom, ide_set_dev_param_mask, NULL, &ide_cdroms, 0);
891 MODULE_PARM_DESC(cdrom, "force device as a CD-ROM");
899 static unsigned int ide_disks;
900 static struct chs_geom ide_disks_chs[MAX_HWIFS * MAX_DRIVES];
902 static int ide_set_disk_chs(const char *str, struct kernel_param *kp)
904 int a, b, c = 0, h = 0, s = 0, i, j = 1;
906 if (sscanf(str, "%d.%d:%d,%d,%d", &a, &b, &c, &h, &s) != 5 &&
907 sscanf(str, "%d.%d:%d", &a, &b, &j) != 3)
910 i = a * MAX_DRIVES + b;
912 if (i >= MAX_HWIFS * MAX_DRIVES || j < 0 || j > 1)
915 if (c > INT_MAX || h > 255 || s > 255)
919 ide_disks |= (1 << i);
921 ide_disks &= (1 << i);
923 ide_disks_chs[i].cyl = c;
924 ide_disks_chs[i].head = h;
925 ide_disks_chs[i].sect = s;
930 module_param_call(chs, ide_set_disk_chs, NULL, NULL, 0);
931 MODULE_PARM_DESC(chs, "force device as a disk (using CHS)");
933 static void ide_dev_apply_params(ide_drive_t *drive)
935 int i = drive->hwif->index * MAX_DRIVES + drive->select.b.unit;
937 if (ide_nodma & (1 << i)) {
938 printk(KERN_INFO "ide: disallowing DMA for %s\n", drive->name);
941 if (ide_noflush & (1 << i)) {
942 printk(KERN_INFO "ide: disabling flush requests for %s\n",
946 if (ide_noprobe & (1 << i)) {
947 printk(KERN_INFO "ide: skipping probe for %s\n", drive->name);
950 if (ide_nowerr & (1 << i)) {
951 printk(KERN_INFO "ide: ignoring the ATA_DF bit for %s\n",
953 drive->bad_wstat = BAD_R_STAT;
955 if (ide_cdroms & (1 << i)) {
956 printk(KERN_INFO "ide: forcing %s as a CD-ROM\n", drive->name);
958 drive->media = ide_cdrom;
959 /* an ATAPI device ignores DRDY */
960 drive->ready_stat = 0;
962 if (ide_disks & (1 << i)) {
963 drive->cyl = drive->bios_cyl = ide_disks_chs[i].cyl;
964 drive->head = drive->bios_head = ide_disks_chs[i].head;
965 drive->sect = drive->bios_sect = ide_disks_chs[i].sect;
966 drive->forced_geom = 1;
967 printk(KERN_INFO "ide: forcing %s as a disk (%d/%d/%d)\n",
969 drive->cyl, drive->head, drive->sect);
971 drive->media = ide_disk;
972 drive->ready_stat = ATA_DRDY;
976 static unsigned int ide_ignore_cable;
978 static int ide_set_ignore_cable(const char *s, struct kernel_param *kp)
982 if (sscanf(s, "%d:%d", &i, &j) != 2 && sscanf(s, "%d", &i) != 1)
985 if (i >= MAX_HWIFS || j < 0 || j > 1)
989 ide_ignore_cable |= (1 << i);
991 ide_ignore_cable &= (1 << i);
996 module_param_call(ignore_cable, ide_set_ignore_cable, NULL, NULL, 0);
997 MODULE_PARM_DESC(ignore_cable, "ignore cable detection");
999 void ide_port_apply_params(ide_hwif_t *hwif)
1003 if (ide_ignore_cable & (1 << hwif->index)) {
1004 printk(KERN_INFO "ide: ignoring cable detection for %s\n",
1006 hwif->cbl = ATA_CBL_PATA40_SHORT;
1009 for (i = 0; i < MAX_DRIVES; i++)
1010 ide_dev_apply_params(&hwif->drives[i]);
1014 * This is gets invoked once during initialization, to set *everything* up
1016 static int __init ide_init(void)
1020 printk(KERN_INFO "Uniform Multi-Platform E-IDE driver\n");
1022 ret = bus_register(&ide_bus_type);
1024 printk(KERN_WARNING "IDE: bus_register error: %d\n", ret);
1028 ide_port_class = class_create(THIS_MODULE, "ide_port");
1029 if (IS_ERR(ide_port_class)) {
1030 ret = PTR_ERR(ide_port_class);
1031 goto out_port_class;
1039 bus_unregister(&ide_bus_type);
1044 static void __exit ide_exit(void)
1048 class_destroy(ide_port_class);
1050 bus_unregister(&ide_bus_type);
1053 module_init(ide_init);
1054 module_exit(ide_exit);
1056 MODULE_LICENSE("GPL");