[linux-block.git] / drivers / ide / ide.c

/*
 *  Copyright (C) 1994-1998	    Linus Torvalds & authors (see below)
 *  Copyright (C) 2003-2005, 2007   Bartlomiej Zolnierkiewicz
 */

/*
 *  Mostly written by Mark Lord  <mlord@pobox.com>
 *                and Gadi Oxman <gadio@netvision.net.il>
 *                and Andre Hedrick <andre@linux-ide.org>
 *
 *  See linux/MAINTAINERS for address of current maintainer.
 *
 * This is the multiple IDE interface driver, as evolved from hd.c.
 * It supports up to MAX_HWIFS IDE interfaces, on one or more IRQs
 *   (usually 14 & 15).
 * There can be up to two drives per interface, as per the ATA-2 spec.
 *
 * ...
 *
 *  From hd.c:
 *  |
 *  | It traverses the request-list, using interrupts to jump between functions.
 *  | As nearly all functions can be called within interrupts, we may not sleep.
 *  | Special care is recommended.  Have Fun!
 *  |
 *  | modified by Drew Eckhardt to check nr of hd's from the CMOS.
 *  |
 *  | Thanks to Branko Lankester, lankeste@fwi.uva.nl, who found a bug
 *  | in the early extended-partition checks and added DM partitions.
 *  |
 *  | Early work on error handling by Mika Liljeberg (liljeber@cs.Helsinki.FI).
 *  |
 *  | IRQ-unmask, drive-id, multiple-mode, support for ">16 heads",
 *  | and general streamlining by Mark Lord (mlord@pobox.com).
 *
 *  October, 1994 -- Complete line-by-line overhaul for linux 1.1.x, by:
 *
 *	Mark Lord	(mlord@pobox.com)		(IDE Perf.Pkg)
 *	Delman Lee	(delman@ieee.org)		("Mr. atdisk2")
 *	Scott Snyder	(snyder@fnald0.fnal.gov)	(ATAPI IDE cd-rom)
 *
 *  This was a rewrite of just about everything from hd.c, though some original
 *  code is still sprinkled about.  Think of it as a major evolution, with
 *  inspiration from lots of linux users, esp.  hamish@zot.apana.org.au
 */

#include <linux/module.h>
#include <linux/types.h>
#include <linux/string.h>
#include <linux/kernel.h>
#include <linux/interrupt.h>
#include <linux/major.h>
#include <linux/errno.h>
#include <linux/genhd.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/ide.h>
#include <linux/hdreg.h>
#include <linux/completion.h>
#include <linux/device.h>

struct class *ide_port_class;

/**
 * ide_device_get	-	get an additional reference to a ide_drive_t
 * @drive:	device to get a reference to
 *
 * Gets a reference to the ide_drive_t and increments the use count of the
 * underlying LLDD module.
 */
int ide_device_get(ide_drive_t *drive)
{
	struct device *host_dev;
	struct module *module;

	if (!get_device(&drive->gendev))
		return -ENXIO;

	host_dev = drive->hwif->host->dev[0];
	module = host_dev ? host_dev->driver->owner : NULL;

	if (module && !try_module_get(module)) {
		put_device(&drive->gendev);
		return -ENXIO;
	}

	return 0;
}
EXPORT_SYMBOL_GPL(ide_device_get);

/**
 * ide_device_put	-	release a reference to a ide_drive_t
 * @drive:	device to release a reference on
 *
 * Release a reference to the ide_drive_t and decrements the use count of
 * the underlying LLDD module.
 */
void ide_device_put(ide_drive_t *drive)
{
#ifdef CONFIG_MODULE_UNLOAD
	struct device *host_dev = drive->hwif->host->dev[0];
	struct module *module = host_dev ? host_dev->driver->owner : NULL;

	if (module)
		module_put(module);
#endif
	put_device(&drive->gendev);
}
EXPORT_SYMBOL_GPL(ide_device_put);

static int ide_bus_match(struct device *dev, struct device_driver *drv)
{
	return 1;
}

static int ide_uevent(struct device *dev, struct kobj_uevent_env *env)
{
	ide_drive_t *drive = to_ide_device(dev);

	add_uevent_var(env, "MEDIA=%s", ide_media_string(drive));
	add_uevent_var(env, "DRIVENAME=%s", drive->name);
	add_uevent_var(env, "MODALIAS=ide:m-%s", ide_media_string(drive));
	return 0;
}

static int generic_ide_probe(struct device *dev)
{
	ide_drive_t *drive = to_ide_device(dev);
	struct ide_driver *drv = to_ide_driver(dev->driver);

	return drv->probe ? drv->probe(drive) : -ENODEV;
}

static int generic_ide_remove(struct device *dev)
{
	ide_drive_t *drive = to_ide_device(dev);
	struct ide_driver *drv = to_ide_driver(dev->driver);

	if (drv->remove)
		drv->remove(drive);

	return 0;
}

static void generic_ide_shutdown(struct device *dev)
{
	ide_drive_t *drive = to_ide_device(dev);
	struct ide_driver *drv = to_ide_driver(dev->driver);

	if (dev->driver && drv->shutdown)
		drv->shutdown(drive);
}

struct bus_type ide_bus_type = {
	.name		= "ide",
	.match		= ide_bus_match,
	.uevent		= ide_uevent,
	.probe		= generic_ide_probe,
	.remove		= generic_ide_remove,
	.shutdown	= generic_ide_shutdown,
	.dev_attrs	= ide_dev_attrs,
	.suspend	= generic_ide_suspend,
	.resume		= generic_ide_resume,
};

EXPORT_SYMBOL_GPL(ide_bus_type);

int ide_vlb_clk;
EXPORT_SYMBOL_GPL(ide_vlb_clk);

module_param_named(vlb_clock, ide_vlb_clk, int, 0);
MODULE_PARM_DESC(vlb_clock, "VLB clock frequency (in MHz)");

int ide_pci_clk;
EXPORT_SYMBOL_GPL(ide_pci_clk);

module_param_named(pci_clock, ide_pci_clk, int, 0);
MODULE_PARM_DESC(pci_clock, "PCI bus clock frequency (in MHz)");

static int ide_set_dev_param_mask(const char *s, struct kernel_param *kp)
{
	int a, b, i, j = 1;
	unsigned int *dev_param_mask = (unsigned int *)kp->arg;

	/* controller . device (0 or 1) [ : 1 (set) | 0 (clear) ] */
	if (sscanf(s, "%d.%d:%d", &a, &b, &j) != 3 &&
	    sscanf(s, "%d.%d", &a, &b) != 2)
		return -EINVAL;

	i = a * MAX_DRIVES + b;

	if (i >= MAX_HWIFS * MAX_DRIVES || j < 0 || j > 1)
		return -EINVAL;

	if (j)
		*dev_param_mask |= (1 << i);
	else
		*dev_param_mask &= ~(1 << i);

	return 0;
}

static unsigned int ide_nodma;

module_param_call(nodma, ide_set_dev_param_mask, NULL, &ide_nodma, 0);
MODULE_PARM_DESC(nodma, "disallow DMA for a device");

static unsigned int ide_noflush;

module_param_call(noflush, ide_set_dev_param_mask, NULL, &ide_noflush, 0);
MODULE_PARM_DESC(noflush, "disable flush requests for a device");

static unsigned int ide_nohpa;

module_param_call(nohpa, ide_set_dev_param_mask, NULL, &ide_nohpa, 0);
MODULE_PARM_DESC(nohpa, "disable Host Protected Area for a device");

static unsigned int ide_noprobe;

module_param_call(noprobe, ide_set_dev_param_mask, NULL, &ide_noprobe, 0);
MODULE_PARM_DESC(noprobe, "skip probing for a device");

static unsigned int ide_nowerr;

module_param_call(nowerr, ide_set_dev_param_mask, NULL, &ide_nowerr, 0);
MODULE_PARM_DESC(nowerr, "ignore the ATA_DF bit for a device");

static unsigned int ide_cdroms;

module_param_call(cdrom, ide_set_dev_param_mask, NULL, &ide_cdroms, 0);
MODULE_PARM_DESC(cdrom, "force device as a CD-ROM");

struct chs_geom {
	unsigned int	cyl;
	u8		head;
	u8		sect;
};

static unsigned int ide_disks;
static struct chs_geom ide_disks_chs[MAX_HWIFS * MAX_DRIVES];

static int ide_set_disk_chs(const char *str, struct kernel_param *kp)
{
	int a, b, c = 0, h = 0, s = 0, i, j = 1;

	/* controller . device (0 or 1) : Cylinders , Heads , Sectors */
	/* controller . device (0 or 1) : 1 (use CHS) | 0 (ignore CHS) */
	if (sscanf(str, "%d.%d:%d,%d,%d", &a, &b, &c, &h, &s) != 5 &&
	    sscanf(str, "%d.%d:%d", &a, &b, &j) != 3)
		return -EINVAL;

	i = a * MAX_DRIVES + b;

	if (i >= MAX_HWIFS * MAX_DRIVES || j < 0 || j > 1)
		return -EINVAL;

	if (c > INT_MAX || h > 255 || s > 255)
		return -EINVAL;

	if (j)
		ide_disks |= (1 << i);
	else
		ide_disks &= ~(1 << i);

	ide_disks_chs[i].cyl  = c;
	ide_disks_chs[i].head = h;
	ide_disks_chs[i].sect = s;

	return 0;
}

module_param_call(chs, ide_set_disk_chs, NULL, NULL, 0);
MODULE_PARM_DESC(chs, "force device as a disk (using CHS)");

static void ide_dev_apply_params(ide_drive_t *drive, u8 unit)
{
	int i = drive->hwif->index * MAX_DRIVES + unit;

	if (ide_nodma & (1 << i)) {
		printk(KERN_INFO "ide: disallowing DMA for %s\n", drive->name);
		drive->dev_flags |= IDE_DFLAG_NODMA;
	}
	if (ide_noflush & (1 << i)) {
		printk(KERN_INFO "ide: disabling flush requests for %s\n",
				 drive->name);
		drive->dev_flags |= IDE_DFLAG_NOFLUSH;
	}
	if (ide_nohpa & (1 << i)) {
		printk(KERN_INFO "ide: disabling Host Protected Area for %s\n",
				 drive->name);
		drive->dev_flags |= IDE_DFLAG_NOHPA;
	}
	if (ide_noprobe & (1 << i)) {
		printk(KERN_INFO "ide: skipping probe for %s\n", drive->name);
		drive->dev_flags |= IDE_DFLAG_NOPROBE;
	}
	if (ide_nowerr & (1 << i)) {
		printk(KERN_INFO "ide: ignoring the ATA_DF bit for %s\n",
				 drive->name);
		drive->bad_wstat = BAD_R_STAT;
	}
	if (ide_cdroms & (1 << i)) {
		printk(KERN_INFO "ide: forcing %s as a CD-ROM\n", drive->name);
		drive->dev_flags |= IDE_DFLAG_PRESENT;
		drive->media = ide_cdrom;
		/* an ATAPI device ignores DRDY */
		drive->ready_stat = 0;
	}
	if (ide_disks & (1 << i)) {
		drive->cyl  = drive->bios_cyl  = ide_disks_chs[i].cyl;
		drive->head = drive->bios_head = ide_disks_chs[i].head;
		drive->sect = drive->bios_sect = ide_disks_chs[i].sect;

		printk(KERN_INFO "ide: forcing %s as a disk (%d/%d/%d)\n",
				 drive->name,
				 drive->cyl, drive->head, drive->sect);

		drive->dev_flags |= IDE_DFLAG_FORCED_GEOM | IDE_DFLAG_PRESENT;
		drive->media = ide_disk;
		drive->ready_stat = ATA_DRDY;
	}
}

static unsigned int ide_ignore_cable;

static int ide_set_ignore_cable(const char *s, struct kernel_param *kp)
{
	int i, j = 1;

	/* controller (ignore) */
	/* controller : 1 (ignore) | 0 (use) */
	if (sscanf(s, "%d:%d", &i, &j) != 2 && sscanf(s, "%d", &i) != 1)
		return -EINVAL;

	if (i >= MAX_HWIFS || j < 0 || j > 1)
		return -EINVAL;

	if (j)
		ide_ignore_cable |= (1 << i);
	else
		ide_ignore_cable &= ~(1 << i);

	return 0;
}

module_param_call(ignore_cable, ide_set_ignore_cable, NULL, NULL, 0);
MODULE_PARM_DESC(ignore_cable, "ignore cable detection");

void ide_port_apply_params(ide_hwif_t *hwif)
{
	ide_drive_t *drive;
	int i;

	if (ide_ignore_cable & (1 << hwif->index)) {
		printk(KERN_INFO "ide: ignoring cable detection for %s\n",
				 hwif->name);
		hwif->cbl = ATA_CBL_PATA40_SHORT;
	}

	ide_port_for_each_dev(i, drive, hwif)
		ide_dev_apply_params(drive, i);
}

/*
 * This is gets invoked once during initialization, to set *everything* up
 */
static int __init ide_init(void)
{
	int ret;

	printk(KERN_INFO "Uniform Multi-Platform E-IDE driver\n");

	ret = bus_register(&ide_bus_type);
	if (ret < 0) {
		printk(KERN_WARNING "IDE: bus_register error: %d\n", ret);
		return ret;
	}

	ide_port_class = class_create(THIS_MODULE, "ide_port");
	if (IS_ERR(ide_port_class)) {
		ret = PTR_ERR(ide_port_class);
		goto out_port_class;
	}

	ide_acpi_init();

	proc_ide_create();

	return 0;

out_port_class:
	bus_unregister(&ide_bus_type);

	return ret;
}

static void __exit ide_exit(void)
{
	proc_ide_destroy();

	class_destroy(ide_port_class);

	bus_unregister(&ide_bus_type);
}

module_init(ide_init);
module_exit(ide_exit);

MODULE_LICENSE("GPL");
Commit	Line	Data
1da177e4	1	/*
59bca8cc	2	* Copyright (C) 1994-1998 Linus Torvalds & authors (see below)
fc410698	3	* Copyright (C) 2003-2005, 2007 Bartlomiej Zolnierkiewicz
1da177e4 LT	4	*/
	5
	6	/*
	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>
	10	*
	11	* See linux/MAINTAINERS for address of current maintainer.
	12	*
	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
	15	* (usually 14 & 15).
	16	* There can be up to two drives per interface, as per the ATA-2 spec.
	17	*
1da177e4 LT	18	* ...
	19	*
	20	* From hd.c:
	21	* \|
	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!
	25	* \|
	26	* \| modified by Drew Eckhardt to check nr of hd's from the CMOS.
	27	* \|
	28	* \| Thanks to Branko Lankester, lankeste@fwi.uva.nl, who found a bug
	29	* \| in the early extended-partition checks and added DM partitions.
	30	* \|
	31	* \| Early work on error handling by Mika Liljeberg (liljeber@cs.Helsinki.FI).
	32	* \|
	33	* \| IRQ-unmask, drive-id, multiple-mode, support for ">16 heads",
	34	* \| and general streamlining by Mark Lord (mlord@pobox.com).
	35	*
	36	* October, 1994 -- Complete line-by-line overhaul for linux 1.1.x, by:
	37	*
	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)
	41	*
	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
1da177e4 LT	45	*/
1da177e4 LT	46
1da177e4 LT	47	#include <linux/module.h>
	48	#include <linux/types.h>
	49	#include <linux/string.h>
	50	#include <linux/kernel.h>
1da177e4 LT	51	#include <linux/interrupt.h>
	52	#include <linux/major.h>
	53	#include <linux/errno.h>
	54	#include <linux/genhd.h>
1da177e4 LT	55	#include <linux/slab.h>
	56	#include <linux/init.h>
	57	#include <linux/pci.h>
1da177e4	58	#include <linux/ide.h>
3ceca727	59	#include <linux/hdreg.h>
1da177e4	60	#include <linux/completion.h>
1da177e4	61	#include <linux/device.h>
1da177e4	62
f74c9141 BZ	63	struct class *ide_port_class;
f74c9141 BZ	64
08da591e BZ	65	/**
	66	* ide_device_get - get an additional reference to a ide_drive_t
	67	* @drive: device to get a reference to
	68	*
	69	* Gets a reference to the ide_drive_t and increments the use count of the
	70	* underlying LLDD module.
	71	*/
	72	int ide_device_get(ide_drive_t *drive)
	73	{
	74	struct device *host_dev;
	75	struct module *module;
	76
	77	if (!get_device(&drive->gendev))
	78	return -ENXIO;
	79
	80	host_dev = drive->hwif->host->dev[0];
	81	module = host_dev ? host_dev->driver->owner : NULL;
	82
	83	if (module && !try_module_get(module)) {
	84	put_device(&drive->gendev);
	85	return -ENXIO;
	86	}
	87
	88	return 0;
	89	}
	90	EXPORT_SYMBOL_GPL(ide_device_get);
	91
	92	/**
	93	* ide_device_put - release a reference to a ide_drive_t
	94	* @drive: device to release a reference on
	95	*
	96	* Release a reference to the ide_drive_t and decrements the use count of
	97	* the underlying LLDD module.
	98	*/
	99	void ide_device_put(ide_drive_t *drive)
	100	{
	101	#ifdef CONFIG_MODULE_UNLOAD
	102	struct device *host_dev = drive->hwif->host->dev[0];
	103	struct module *module = host_dev ? host_dev->driver->owner : NULL;
	104
	105	if (module)
	106	module_put(module);
	107	#endif
	108	put_device(&drive->gendev);
	109	}
	110	EXPORT_SYMBOL_GPL(ide_device_put);
	111
8604affd BZ	112	static int ide_bus_match(struct device dev, struct device_driver drv)
	113	{
	114	return 1;
	115	}
	116
7eff2e7a	117	static int ide_uevent(struct device dev, struct kobj_uevent_env env)
263756ec KS	118	{
263756ec KS	119	ide_drive_t *drive = to_ide_device(dev);
7eff2e7a	120
ebdab07d	121	add_uevent_var(env, "MEDIA=%s", ide_media_string(drive));
7eff2e7a	122	add_uevent_var(env, "DRIVENAME=%s", drive->name);
ebdab07d	123	add_uevent_var(env, "MODALIAS=ide:m-%s", ide_media_string(drive));
263756ec KS	124	return 0;
	125	}
	126
4031bbe4 RK	127	static int generic_ide_probe(struct device *dev)
	128	{
	129	ide_drive_t *drive = to_ide_device(dev);
7f3c868b	130	struct ide_driver *drv = to_ide_driver(dev->driver);
4031bbe4 RK	131
	132	return drv->probe ? drv->probe(drive) : -ENODEV;
	133	}
	134
	135	static int generic_ide_remove(struct device *dev)
	136	{
	137	ide_drive_t *drive = to_ide_device(dev);
7f3c868b	138	struct ide_driver *drv = to_ide_driver(dev->driver);
4031bbe4 RK	139
	140	if (drv->remove)
	141	drv->remove(drive);
	142
	143	return 0;
	144	}
	145
	146	static void generic_ide_shutdown(struct device *dev)
	147	{
	148	ide_drive_t *drive = to_ide_device(dev);
7f3c868b	149	struct ide_driver *drv = to_ide_driver(dev->driver);
4031bbe4 RK	150
	151	if (dev->driver && drv->shutdown)
	152	drv->shutdown(drive);
	153	}
	154
1da177e4 LT	155	struct bus_type ide_bus_type = {
1da177e4 LT	156	.name = "ide",
8604affd	157	.match = ide_bus_match,
263756ec	158	.uevent = ide_uevent,
4031bbe4 RK	159	.probe = generic_ide_probe,
	160	.remove = generic_ide_remove,
	161	.shutdown = generic_ide_shutdown,
263756ec	162	.dev_attrs = ide_dev_attrs,
1da177e4 LT	163	.suspend = generic_ide_suspend,
	164	.resume = generic_ide_resume,
	165	};
	166
8604affd BZ	167	EXPORT_SYMBOL_GPL(ide_bus_type);
8604affd BZ	168
ebae41a5 BZ	169	int ide_vlb_clk;
	170	EXPORT_SYMBOL_GPL(ide_vlb_clk);
	171
	172	module_param_named(vlb_clock, ide_vlb_clk, int, 0);
	173	MODULE_PARM_DESC(vlb_clock, "VLB clock frequency (in MHz)");
	174
	175	int ide_pci_clk;
	176	EXPORT_SYMBOL_GPL(ide_pci_clk);
	177
	178	module_param_named(pci_clock, ide_pci_clk, int, 0);
	179	MODULE_PARM_DESC(pci_clock, "PCI bus clock frequency (in MHz)");
	180
6e87543a BZ	181	static int ide_set_dev_param_mask(const char s, struct kernel_param kp)
	182	{
	183	int a, b, i, j = 1;
	184	unsigned int dev_param_mask = (unsigned int )kp->arg;
	185
0af80c04	186	/* controller . device (0 or 1) [ : 1 (set) \| 0 (clear) ] */
6e87543a BZ	187	if (sscanf(s, "%d.%d:%d", &a, &b, &j) != 3 &&
	188	sscanf(s, "%d.%d", &a, &b) != 2)
	189	return -EINVAL;
	190
	191	i = a * MAX_DRIVES + b;
	192
	193	if (i >= MAX_HWIFS * MAX_DRIVES \|\| j < 0 \|\| j > 1)
	194	return -EINVAL;
	195
	196	if (j)
	197	*dev_param_mask \|= (1 << i);
	198	else
0af80c04	199	*dev_param_mask &= ~(1 << i);
6e87543a BZ	200
	201	return 0;
	202	}
	203
	204	static unsigned int ide_nodma;
	205
	206	module_param_call(nodma, ide_set_dev_param_mask, NULL, &ide_nodma, 0);
	207	MODULE_PARM_DESC(nodma, "disallow DMA for a device");
	208
	209	static unsigned int ide_noflush;
	210
	211	module_param_call(noflush, ide_set_dev_param_mask, NULL, &ide_noflush, 0);
	212	MODULE_PARM_DESC(noflush, "disable flush requests for a device");
	213
075affcb BZ	214	static unsigned int ide_nohpa;
	215
	216	module_param_call(nohpa, ide_set_dev_param_mask, NULL, &ide_nohpa, 0);
	217	MODULE_PARM_DESC(nohpa, "disable Host Protected Area for a device");
	218
6e87543a BZ	219	static unsigned int ide_noprobe;
	220
	221	module_param_call(noprobe, ide_set_dev_param_mask, NULL, &ide_noprobe, 0);
	222	MODULE_PARM_DESC(noprobe, "skip probing for a device");
	223
	224	static unsigned int ide_nowerr;
	225
	226	module_param_call(nowerr, ide_set_dev_param_mask, NULL, &ide_nowerr, 0);
3a7d2484	227	MODULE_PARM_DESC(nowerr, "ignore the ATA_DF bit for a device");
6e87543a	228
4706a7e0 BZ	229	static unsigned int ide_cdroms;
	230
	231	module_param_call(cdrom, ide_set_dev_param_mask, NULL, &ide_cdroms, 0);
	232	MODULE_PARM_DESC(cdrom, "force device as a CD-ROM");
	233
	234	struct chs_geom {
	235	unsigned int cyl;
	236	u8 head;
	237	u8 sect;
	238	};
	239
	240	static unsigned int ide_disks;
	241	static struct chs_geom ide_disks_chs[MAX_HWIFS * MAX_DRIVES];
	242
	243	static int ide_set_disk_chs(const char str, struct kernel_param kp)
	244	{
	245	int a, b, c = 0, h = 0, s = 0, i, j = 1;
	246
0af80c04 DF	247	/* controller . device (0 or 1) : Cylinders , Heads , Sectors */
0af80c04 DF	248	/* controller . device (0 or 1) : 1 (use CHS) \| 0 (ignore CHS) */
4706a7e0 BZ	249	if (sscanf(str, "%d.%d:%d,%d,%d", &a, &b, &c, &h, &s) != 5 &&
	250	sscanf(str, "%d.%d:%d", &a, &b, &j) != 3)
	251	return -EINVAL;
	252
	253	i = a * MAX_DRIVES + b;
	254
	255	if (i >= MAX_HWIFS * MAX_DRIVES \|\| j < 0 \|\| j > 1)
	256	return -EINVAL;
	257
	258	if (c > INT_MAX \|\| h > 255 \|\| s > 255)
	259	return -EINVAL;
	260
	261	if (j)
	262	ide_disks \|= (1 << i);
	263	else
0af80c04	264	ide_disks &= ~(1 << i);
4706a7e0 BZ	265
	266	ide_disks_chs[i].cyl = c;
	267	ide_disks_chs[i].head = h;
	268	ide_disks_chs[i].sect = s;
	269
	270	return 0;
	271	}
	272
	273	module_param_call(chs, ide_set_disk_chs, NULL, NULL, 0);
	274	MODULE_PARM_DESC(chs, "force device as a disk (using CHS)");
	275
123995b9	276	static void ide_dev_apply_params(ide_drive_t *drive, u8 unit)
6e87543a	277	{
123995b9	278	int i = drive->hwif->index * MAX_DRIVES + unit;
6e87543a BZ	279
	280	if (ide_nodma & (1 << i)) {
	281	printk(KERN_INFO "ide: disallowing DMA for %s\n", drive->name);
97100fc8	282	drive->dev_flags \|= IDE_DFLAG_NODMA;
6e87543a BZ	283	}
	284	if (ide_noflush & (1 << i)) {
	285	printk(KERN_INFO "ide: disabling flush requests for %s\n",
	286	drive->name);
97100fc8	287	drive->dev_flags \|= IDE_DFLAG_NOFLUSH;
6e87543a	288	}
075affcb BZ	289	if (ide_nohpa & (1 << i)) {
	290	printk(KERN_INFO "ide: disabling Host Protected Area for %s\n",
	291	drive->name);
	292	drive->dev_flags \|= IDE_DFLAG_NOHPA;
	293	}
6e87543a BZ	294	if (ide_noprobe & (1 << i)) {
6e87543a BZ	295	printk(KERN_INFO "ide: skipping probe for %s\n", drive->name);
97100fc8	296	drive->dev_flags \|= IDE_DFLAG_NOPROBE;
6e87543a BZ	297	}
6e87543a BZ	298	if (ide_nowerr & (1 << i)) {
3a7d2484	299	printk(KERN_INFO "ide: ignoring the ATA_DF bit for %s\n",
6e87543a BZ	300	drive->name);
	301	drive->bad_wstat = BAD_R_STAT;
	302	}
4706a7e0 BZ	303	if (ide_cdroms & (1 << i)) {
4706a7e0 BZ	304	printk(KERN_INFO "ide: forcing %s as a CD-ROM\n", drive->name);
97100fc8	305	drive->dev_flags \|= IDE_DFLAG_PRESENT;
4706a7e0 BZ	306	drive->media = ide_cdrom;
	307	/* an ATAPI device ignores DRDY */
	308	drive->ready_stat = 0;
	309	}
	310	if (ide_disks & (1 << i)) {
	311	drive->cyl = drive->bios_cyl = ide_disks_chs[i].cyl;
	312	drive->head = drive->bios_head = ide_disks_chs[i].head;
	313	drive->sect = drive->bios_sect = ide_disks_chs[i].sect;
97100fc8	314
4706a7e0 BZ	315	printk(KERN_INFO "ide: forcing %s as a disk (%d/%d/%d)\n",
	316	drive->name,
	317	drive->cyl, drive->head, drive->sect);
97100fc8 BZ	318
97100fc8 BZ	319	drive->dev_flags \|= IDE_DFLAG_FORCED_GEOM \| IDE_DFLAG_PRESENT;
4706a7e0	320	drive->media = ide_disk;
3a7d2484	321	drive->ready_stat = ATA_DRDY;
4706a7e0	322	}
6e87543a BZ	323	}
6e87543a BZ	324
9fd91d95 BZ	325	static unsigned int ide_ignore_cable;
	326
	327	static int ide_set_ignore_cable(const char s, struct kernel_param kp)
	328	{
	329	int i, j = 1;
	330
0af80c04 DF	331	/* controller (ignore) */
0af80c04 DF	332	/* controller : 1 (ignore) \| 0 (use) */
9fd91d95 BZ	333	if (sscanf(s, "%d:%d", &i, &j) != 2 && sscanf(s, "%d", &i) != 1)
	334	return -EINVAL;
	335
	336	if (i >= MAX_HWIFS \|\| j < 0 \|\| j > 1)
	337	return -EINVAL;
	338
	339	if (j)
	340	ide_ignore_cable \|= (1 << i);
	341	else
0af80c04	342	ide_ignore_cable &= ~(1 << i);
9fd91d95 BZ	343
	344	return 0;
	345	}
	346
	347	module_param_call(ignore_cable, ide_set_ignore_cable, NULL, NULL, 0);
	348	MODULE_PARM_DESC(ignore_cable, "ignore cable detection");
	349
	350	void ide_port_apply_params(ide_hwif_t *hwif)
	351	{
2bd24a1c	352	ide_drive_t *drive;
6e87543a BZ	353	int i;
6e87543a BZ	354
9fd91d95 BZ	355	if (ide_ignore_cable & (1 << hwif->index)) {
	356	printk(KERN_INFO "ide: ignoring cable detection for %s\n",
	357	hwif->name);
	358	hwif->cbl = ATA_CBL_PATA40_SHORT;
	359	}
6e87543a	360
2bd24a1c BZ	361	ide_port_for_each_dev(i, drive, hwif)
2bd24a1c BZ	362	ide_dev_apply_params(drive, i);
9fd91d95 BZ	363	}
9fd91d95 BZ	364
1da177e4 LT	365	/*
	366	* This is gets invoked once during initialization, to set everything up
	367	*/
	368	static int __init ide_init(void)
	369	{
349ae23f RD	370	int ret;
349ae23f RD	371
eba8ff94	372	printk(KERN_INFO "Uniform Multi-Platform E-IDE driver\n");
537f06c5	373
349ae23f RD	374	ret = bus_register(&ide_bus_type);
	375	if (ret < 0) {
	376	printk(KERN_WARNING "IDE: bus_register error: %d\n", ret);
	377	return ret;
	378	}
1da177e4	379
f74c9141 BZ	380	ide_port_class = class_create(THIS_MODULE, "ide_port");
	381	if (IS_ERR(ide_port_class)) {
	382	ret = PTR_ERR(ide_port_class);
	383	goto out_port_class;
	384	}
f74c9141	385
8b803bd1 BZ	386	ide_acpi_init();
8b803bd1 BZ	387
5cbf79cd	388	proc_ide_create();
1da177e4	389
1da177e4	390	return 0;
f74c9141 BZ	391
	392	out_port_class:
	393	bus_unregister(&ide_bus_type);
	394
	395	return ret;
1da177e4 LT	396	}
1da177e4 LT	397
931ee0dc	398	static void __exit ide_exit(void)
1da177e4	399	{
1da177e4	400	proc_ide_destroy();
1da177e4	401
f74c9141 BZ	402	class_destroy(ide_port_class);
f74c9141 BZ	403
1da177e4 LT	404	bus_unregister(&ide_bus_type);
	405	}
	406
1da177e4	407	module_init(ide_init);
931ee0dc	408	module_exit(ide_exit);
1da177e4	409
931ee0dc	410	MODULE_LICENSE("GPL");