[mirror_ubuntu-bionic-kernel.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;

/*
 *	Locks for IDE setting functionality
 */

DEFINE_MUTEX(ide_setting_mtx);

ide_devset_get(io_32bit, io_32bit);

static int set_io_32bit(ide_drive_t *drive, int arg)
{
	if (drive->dev_flags & IDE_DFLAG_NO_IO_32BIT)
		return -EPERM;

	if (arg < 0 || arg > 1 + (SUPPORT_VLB_SYNC << 1))
		return -EINVAL;

	drive->io_32bit = arg;

	return 0;
}

ide_devset_get_flag(ksettings, IDE_DFLAG_KEEP_SETTINGS);

static int set_ksettings(ide_drive_t *drive, int arg)
{
	if (arg < 0 || arg > 1)
		return -EINVAL;

	if (arg)
		drive->dev_flags |= IDE_DFLAG_KEEP_SETTINGS;
	else
		drive->dev_flags &= ~IDE_DFLAG_KEEP_SETTINGS;

	return 0;
}

ide_devset_get_flag(using_dma, IDE_DFLAG_USING_DMA);

static int set_using_dma(ide_drive_t *drive, int arg)
{
#ifdef CONFIG_BLK_DEV_IDEDMA
	int err = -EPERM;

	if (arg < 0 || arg > 1)
		return -EINVAL;

	if (ata_id_has_dma(drive->id) == 0)
		goto out;

	if (drive->hwif->dma_ops == NULL)
		goto out;

	err = 0;

	if (arg) {
		if (ide_set_dma(drive))
			err = -EIO;
	} else
		ide_dma_off(drive);

out:
	return err;
#else
	if (arg < 0 || arg > 1)
		return -EINVAL;

	return -EPERM;
#endif
}

/*
 * handle HDIO_SET_PIO_MODE ioctl abusers here, eventually it will go away
 */
static int set_pio_mode_abuse(ide_hwif_t *hwif, u8 req_pio)
{
	switch (req_pio) {
	case 202:
	case 201:
	case 200:
	case 102:
	case 101:
	case 100:
		return (hwif->host_flags & IDE_HFLAG_ABUSE_DMA_MODES) ? 1 : 0;
	case 9:
	case 8:
		return (hwif->host_flags & IDE_HFLAG_ABUSE_PREFETCH) ? 1 : 0;
	case 7:
	case 6:
		return (hwif->host_flags & IDE_HFLAG_ABUSE_FAST_DEVSEL) ? 1 : 0;
	default:
		return 0;
	}
}

static int set_pio_mode(ide_drive_t *drive, int arg)
{
	ide_hwif_t *hwif = drive->hwif;
	const struct ide_port_ops *port_ops = hwif->port_ops;

	if (arg < 0 || arg > 255)
		return -EINVAL;

	if (port_ops == NULL || port_ops->set_pio_mode == NULL ||
	    (hwif->host_flags & IDE_HFLAG_NO_SET_MODE))
		return -ENOSYS;

	if (set_pio_mode_abuse(drive->hwif, arg)) {
		if (arg == 8 || arg == 9) {
			unsigned long flags;

			/* take lock for IDE_DFLAG_[NO_]UNMASK/[NO_]IO_32BIT */
			spin_lock_irqsave(&hwif->lock, flags);
			port_ops->set_pio_mode(drive, arg);
			spin_unlock_irqrestore(&hwif->lock, flags);
		} else
			port_ops->set_pio_mode(drive, arg);
	} else {
		int keep_dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);

		ide_set_pio(drive, arg);

		if (hwif->host_flags & IDE_HFLAG_SET_PIO_MODE_KEEP_DMA) {
			if (keep_dma)
				ide_dma_on(drive);
		}
	}

	return 0;
}

ide_devset_get_flag(unmaskirq, IDE_DFLAG_UNMASK);

static int set_unmaskirq(ide_drive_t *drive, int arg)
{
	if (drive->dev_flags & IDE_DFLAG_NO_UNMASK)
		return -EPERM;

	if (arg < 0 || arg > 1)
		return -EINVAL;

	if (arg)
		drive->dev_flags |= IDE_DFLAG_UNMASK;
	else
		drive->dev_flags &= ~IDE_DFLAG_UNMASK;

	return 0;
}

ide_ext_devset_rw_sync(io_32bit, io_32bit);
ide_ext_devset_rw_sync(keepsettings, ksettings);
ide_ext_devset_rw_sync(unmaskirq, unmaskirq);
ide_ext_devset_rw_sync(using_dma, using_dma);
__IDE_DEVSET(pio_mode, DS_SYNC, NULL, set_pio_mode);

/**
 * 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_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_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;
	}

	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
1da177e4 LT	65	/*
	66	* Locks for IDE setting functionality
	67	*/
	68
f9383c42	69	DEFINE_MUTEX(ide_setting_mtx);
1da177e4	70
8185d5aa BZ	71	ide_devset_get(io_32bit, io_32bit);
8185d5aa BZ	72
92f1f8fd	73	static int set_io_32bit(ide_drive_t *drive, int arg)
1da177e4	74	{
97100fc8	75	if (drive->dev_flags & IDE_DFLAG_NO_IO_32BIT)
1497943e BZ	76	return -EPERM;
	77
	78	if (arg < 0 \|\| arg > 1 + (SUPPORT_VLB_SYNC << 1))
	79	return -EINVAL;
	80
1da177e4	81	drive->io_32bit = arg;
644a9d76	82
1da177e4 LT	83	return 0;
	84	}
	85
97100fc8	86	ide_devset_get_flag(ksettings, IDE_DFLAG_KEEP_SETTINGS);
8185d5aa	87
92f1f8fd	88	static int set_ksettings(ide_drive_t *drive, int arg)
1497943e BZ	89	{
	90	if (arg < 0 \|\| arg > 1)
	91	return -EINVAL;
	92
97100fc8 BZ	93	if (arg)
	94	drive->dev_flags \|= IDE_DFLAG_KEEP_SETTINGS;
	95	else
	96	drive->dev_flags &= ~IDE_DFLAG_KEEP_SETTINGS;
1497943e BZ	97
	98	return 0;
	99	}
	100
97100fc8	101	ide_devset_get_flag(using_dma, IDE_DFLAG_USING_DMA);
8185d5aa	102
92f1f8fd	103	static int set_using_dma(ide_drive_t *drive, int arg)
1da177e4 LT	104	{
1da177e4 LT	105	#ifdef CONFIG_BLK_DEV_IDEDMA
87996204 BZ	106	int err = -EPERM;
87996204 BZ	107
1497943e BZ	108	if (arg < 0 \|\| arg > 1)
	109	return -EINVAL;
	110
48fb2688	111	if (ata_id_has_dma(drive->id) == 0)
87996204 BZ	112	goto out;
87996204 BZ	113
92f1f8fd	114	if (drive->hwif->dma_ops == NULL)
87996204 BZ	115	goto out;
87996204 BZ	116
87996204 BZ	117	err = 0;
87996204 BZ	118
1da177e4	119	if (arg) {
23b1bd45	120	if (ide_set_dma(drive))
87996204	121	err = -EIO;
7469aaf6 BZ	122	} else
7469aaf6 BZ	123	ide_dma_off(drive);
87996204	124
87996204 BZ	125	out:
87996204 BZ	126	return err;
1da177e4	127	#else
1497943e BZ	128	if (arg < 0 \|\| arg > 1)
	129	return -EINVAL;
	130
1da177e4 LT	131	return -EPERM;
	132	#endif
	133	}
	134
6982daf7 BZ	135	/*
	136	* handle HDIO_SET_PIO_MODE ioctl abusers here, eventually it will go away
	137	*/
	138	static int set_pio_mode_abuse(ide_hwif_t *hwif, u8 req_pio)
	139	{
	140	switch (req_pio) {
	141	case 202:
	142	case 201:
	143	case 200:
	144	case 102:
	145	case 101:
	146	case 100:
	147	return (hwif->host_flags & IDE_HFLAG_ABUSE_DMA_MODES) ? 1 : 0;
	148	case 9:
	149	case 8:
	150	return (hwif->host_flags & IDE_HFLAG_ABUSE_PREFETCH) ? 1 : 0;
	151	case 7:
	152	case 6:
	153	return (hwif->host_flags & IDE_HFLAG_ABUSE_FAST_DEVSEL) ? 1 : 0;
	154	default:
	155	return 0;
	156	}
	157	}
	158
92f1f8fd	159	static int set_pio_mode(ide_drive_t *drive, int arg)
1da177e4	160	{
784506cb	161	ide_hwif_t *hwif = drive->hwif;
ac95beed	162	const struct ide_port_ops *port_ops = hwif->port_ops;
1da177e4	163
1497943e BZ	164	if (arg < 0 \|\| arg > 255)
	165	return -EINVAL;
	166
ac95beed	167	if (port_ops == NULL \|\| port_ops->set_pio_mode == NULL \|\|
784506cb	168	(hwif->host_flags & IDE_HFLAG_NO_SET_MODE))
1da177e4	169	return -ENOSYS;
26bcb879	170
6982daf7 BZ	171	if (set_pio_mode_abuse(drive->hwif, arg)) {
	172	if (arg == 8 \|\| arg == 9) {
	173	unsigned long flags;
145b75e9	174
6982daf7	175	/* take lock for IDE_DFLAG_[NO_]UNMASK/[NO_]IO_32BIT */
b65fac32	176	spin_lock_irqsave(&hwif->lock, flags);
6982daf7	177	port_ops->set_pio_mode(drive, arg);
b65fac32	178	spin_unlock_irqrestore(&hwif->lock, flags);
6982daf7 BZ	179	} else
	180	port_ops->set_pio_mode(drive, arg);
	181	} else {
	182	int keep_dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
145b75e9	183
6982daf7	184	ide_set_pio(drive, arg);
5b114715	185
6982daf7 BZ	186	if (hwif->host_flags & IDE_HFLAG_SET_PIO_MODE_KEEP_DMA) {
	187	if (keep_dma)
	188	ide_dma_on(drive);
	189	}
	190	}
5b114715	191
1da177e4 LT	192	return 0;
	193	}
	194
97100fc8	195	ide_devset_get_flag(unmaskirq, IDE_DFLAG_UNMASK);
8185d5aa	196
92f1f8fd	197	static int set_unmaskirq(ide_drive_t *drive, int arg)
1497943e	198	{
97100fc8	199	if (drive->dev_flags & IDE_DFLAG_NO_UNMASK)
1497943e BZ	200	return -EPERM;
	201
	202	if (arg < 0 \|\| arg > 1)
	203	return -EINVAL;
	204
97100fc8 BZ	205	if (arg)
	206	drive->dev_flags \|= IDE_DFLAG_UNMASK;
	207	else
	208	drive->dev_flags &= ~IDE_DFLAG_UNMASK;
1497943e BZ	209
	210	return 0;
	211	}
	212
f8790489 BZ	213	ide_ext_devset_rw_sync(io_32bit, io_32bit);
	214	ide_ext_devset_rw_sync(keepsettings, ksettings);
	215	ide_ext_devset_rw_sync(unmaskirq, unmaskirq);
	216	ide_ext_devset_rw_sync(using_dma, using_dma);
6982daf7	217	__IDE_DEVSET(pio_mode, DS_SYNC, NULL, set_pio_mode);
92f1f8fd	218
08da591e BZ	219	/**
	220	* ide_device_get - get an additional reference to a ide_drive_t
	221	* @drive: device to get a reference to
	222	*
	223	* Gets a reference to the ide_drive_t and increments the use count of the
	224	* underlying LLDD module.
	225	*/
	226	int ide_device_get(ide_drive_t *drive)
	227	{
	228	struct device *host_dev;
	229	struct module *module;
	230
	231	if (!get_device(&drive->gendev))
	232	return -ENXIO;
	233
	234	host_dev = drive->hwif->host->dev[0];
	235	module = host_dev ? host_dev->driver->owner : NULL;
	236
	237	if (module && !try_module_get(module)) {
	238	put_device(&drive->gendev);
	239	return -ENXIO;
	240	}
	241
	242	return 0;
	243	}
	244	EXPORT_SYMBOL_GPL(ide_device_get);
	245
	246	/**
	247	* ide_device_put - release a reference to a ide_drive_t
	248	* @drive: device to release a reference on
	249	*
	250	* Release a reference to the ide_drive_t and decrements the use count of
	251	* the underlying LLDD module.
	252	*/
	253	void ide_device_put(ide_drive_t *drive)
	254	{
	255	#ifdef CONFIG_MODULE_UNLOAD
	256	struct device *host_dev = drive->hwif->host->dev[0];
	257	struct module *module = host_dev ? host_dev->driver->owner : NULL;
	258
	259	if (module)
	260	module_put(module);
	261	#endif
	262	put_device(&drive->gendev);
	263	}
	264	EXPORT_SYMBOL_GPL(ide_device_put);
	265
8604affd BZ	266	static int ide_bus_match(struct device dev, struct device_driver drv)
	267	{
	268	return 1;
	269	}
	270
7eff2e7a	271	static int ide_uevent(struct device dev, struct kobj_uevent_env env)
263756ec KS	272	{
263756ec KS	273	ide_drive_t *drive = to_ide_device(dev);
7eff2e7a	274
ebdab07d	275	add_uevent_var(env, "MEDIA=%s", ide_media_string(drive));
7eff2e7a	276	add_uevent_var(env, "DRIVENAME=%s", drive->name);
ebdab07d	277	add_uevent_var(env, "MODALIAS=ide:m-%s", ide_media_string(drive));
263756ec KS	278	return 0;
	279	}
	280
4031bbe4 RK	281	static int generic_ide_probe(struct device *dev)
	282	{
	283	ide_drive_t *drive = to_ide_device(dev);
7f3c868b	284	struct ide_driver *drv = to_ide_driver(dev->driver);
4031bbe4 RK	285
	286	return drv->probe ? drv->probe(drive) : -ENODEV;
	287	}
	288
	289	static int generic_ide_remove(struct device *dev)
	290	{
	291	ide_drive_t *drive = to_ide_device(dev);
7f3c868b	292	struct ide_driver *drv = to_ide_driver(dev->driver);
4031bbe4 RK	293
	294	if (drv->remove)
	295	drv->remove(drive);
	296
	297	return 0;
	298	}
	299
	300	static void generic_ide_shutdown(struct device *dev)
	301	{
	302	ide_drive_t *drive = to_ide_device(dev);
7f3c868b	303	struct ide_driver *drv = to_ide_driver(dev->driver);
4031bbe4 RK	304
	305	if (dev->driver && drv->shutdown)
	306	drv->shutdown(drive);
	307	}
	308
1da177e4 LT	309	struct bus_type ide_bus_type = {
1da177e4 LT	310	.name = "ide",
8604affd	311	.match = ide_bus_match,
263756ec	312	.uevent = ide_uevent,
4031bbe4 RK	313	.probe = generic_ide_probe,
	314	.remove = generic_ide_remove,
	315	.shutdown = generic_ide_shutdown,
263756ec	316	.dev_attrs = ide_dev_attrs,
1da177e4 LT	317	.suspend = generic_ide_suspend,
	318	.resume = generic_ide_resume,
	319	};
	320
8604affd BZ	321	EXPORT_SYMBOL_GPL(ide_bus_type);
8604affd BZ	322
ebae41a5 BZ	323	int ide_vlb_clk;
	324	EXPORT_SYMBOL_GPL(ide_vlb_clk);
	325
	326	module_param_named(vlb_clock, ide_vlb_clk, int, 0);
	327	MODULE_PARM_DESC(vlb_clock, "VLB clock frequency (in MHz)");
	328
	329	int ide_pci_clk;
	330	EXPORT_SYMBOL_GPL(ide_pci_clk);
	331
	332	module_param_named(pci_clock, ide_pci_clk, int, 0);
	333	MODULE_PARM_DESC(pci_clock, "PCI bus clock frequency (in MHz)");
	334
6e87543a BZ	335	static int ide_set_dev_param_mask(const char s, struct kernel_param kp)
	336	{
	337	int a, b, i, j = 1;
	338	unsigned int dev_param_mask = (unsigned int )kp->arg;
	339
0af80c04	340	/* controller . device (0 or 1) [ : 1 (set) \| 0 (clear) ] */
6e87543a BZ	341	if (sscanf(s, "%d.%d:%d", &a, &b, &j) != 3 &&
	342	sscanf(s, "%d.%d", &a, &b) != 2)
	343	return -EINVAL;
	344
	345	i = a * MAX_DRIVES + b;
	346
	347	if (i >= MAX_HWIFS * MAX_DRIVES \|\| j < 0 \|\| j > 1)
	348	return -EINVAL;
	349
	350	if (j)
	351	*dev_param_mask \|= (1 << i);
	352	else
0af80c04	353	*dev_param_mask &= ~(1 << i);
6e87543a BZ	354
	355	return 0;
	356	}
	357
	358	static unsigned int ide_nodma;
	359
	360	module_param_call(nodma, ide_set_dev_param_mask, NULL, &ide_nodma, 0);
	361	MODULE_PARM_DESC(nodma, "disallow DMA for a device");
	362
	363	static unsigned int ide_noflush;
	364
	365	module_param_call(noflush, ide_set_dev_param_mask, NULL, &ide_noflush, 0);
	366	MODULE_PARM_DESC(noflush, "disable flush requests for a device");
	367
	368	static unsigned int ide_noprobe;
	369
	370	module_param_call(noprobe, ide_set_dev_param_mask, NULL, &ide_noprobe, 0);
	371	MODULE_PARM_DESC(noprobe, "skip probing for a device");
	372
	373	static unsigned int ide_nowerr;
	374
	375	module_param_call(nowerr, ide_set_dev_param_mask, NULL, &ide_nowerr, 0);
3a7d2484	376	MODULE_PARM_DESC(nowerr, "ignore the ATA_DF bit for a device");
6e87543a	377
4706a7e0 BZ	378	static unsigned int ide_cdroms;
	379
	380	module_param_call(cdrom, ide_set_dev_param_mask, NULL, &ide_cdroms, 0);
	381	MODULE_PARM_DESC(cdrom, "force device as a CD-ROM");
	382
	383	struct chs_geom {
	384	unsigned int cyl;
	385	u8 head;
	386	u8 sect;
	387	};
	388
	389	static unsigned int ide_disks;
	390	static struct chs_geom ide_disks_chs[MAX_HWIFS * MAX_DRIVES];
	391
	392	static int ide_set_disk_chs(const char str, struct kernel_param kp)
	393	{
	394	int a, b, c = 0, h = 0, s = 0, i, j = 1;
	395
0af80c04 DF	396	/* controller . device (0 or 1) : Cylinders , Heads , Sectors */
0af80c04 DF	397	/* controller . device (0 or 1) : 1 (use CHS) \| 0 (ignore CHS) */
4706a7e0 BZ	398	if (sscanf(str, "%d.%d:%d,%d,%d", &a, &b, &c, &h, &s) != 5 &&
	399	sscanf(str, "%d.%d:%d", &a, &b, &j) != 3)
	400	return -EINVAL;
	401
	402	i = a * MAX_DRIVES + b;
	403
	404	if (i >= MAX_HWIFS * MAX_DRIVES \|\| j < 0 \|\| j > 1)
	405	return -EINVAL;
	406
	407	if (c > INT_MAX \|\| h > 255 \|\| s > 255)
	408	return -EINVAL;
	409
	410	if (j)
	411	ide_disks \|= (1 << i);
	412	else
0af80c04	413	ide_disks &= ~(1 << i);
4706a7e0 BZ	414
	415	ide_disks_chs[i].cyl = c;
	416	ide_disks_chs[i].head = h;
	417	ide_disks_chs[i].sect = s;
	418
	419	return 0;
	420	}
	421
	422	module_param_call(chs, ide_set_disk_chs, NULL, NULL, 0);
	423	MODULE_PARM_DESC(chs, "force device as a disk (using CHS)");
	424
123995b9	425	static void ide_dev_apply_params(ide_drive_t *drive, u8 unit)
6e87543a	426	{
123995b9	427	int i = drive->hwif->index * MAX_DRIVES + unit;
6e87543a BZ	428
	429	if (ide_nodma & (1 << i)) {
	430	printk(KERN_INFO "ide: disallowing DMA for %s\n", drive->name);
97100fc8	431	drive->dev_flags \|= IDE_DFLAG_NODMA;
6e87543a BZ	432	}
	433	if (ide_noflush & (1 << i)) {
	434	printk(KERN_INFO "ide: disabling flush requests for %s\n",
	435	drive->name);
97100fc8	436	drive->dev_flags \|= IDE_DFLAG_NOFLUSH;
6e87543a BZ	437	}
	438	if (ide_noprobe & (1 << i)) {
	439	printk(KERN_INFO "ide: skipping probe for %s\n", drive->name);
97100fc8	440	drive->dev_flags \|= IDE_DFLAG_NOPROBE;
6e87543a BZ	441	}
6e87543a BZ	442	if (ide_nowerr & (1 << i)) {
3a7d2484	443	printk(KERN_INFO "ide: ignoring the ATA_DF bit for %s\n",
6e87543a BZ	444	drive->name);
	445	drive->bad_wstat = BAD_R_STAT;
	446	}
4706a7e0 BZ	447	if (ide_cdroms & (1 << i)) {
4706a7e0 BZ	448	printk(KERN_INFO "ide: forcing %s as a CD-ROM\n", drive->name);
97100fc8	449	drive->dev_flags \|= IDE_DFLAG_PRESENT;
4706a7e0 BZ	450	drive->media = ide_cdrom;
	451	/* an ATAPI device ignores DRDY */
	452	drive->ready_stat = 0;
	453	}
	454	if (ide_disks & (1 << i)) {
	455	drive->cyl = drive->bios_cyl = ide_disks_chs[i].cyl;
	456	drive->head = drive->bios_head = ide_disks_chs[i].head;
	457	drive->sect = drive->bios_sect = ide_disks_chs[i].sect;
97100fc8	458
4706a7e0 BZ	459	printk(KERN_INFO "ide: forcing %s as a disk (%d/%d/%d)\n",
	460	drive->name,
	461	drive->cyl, drive->head, drive->sect);
97100fc8 BZ	462
97100fc8 BZ	463	drive->dev_flags \|= IDE_DFLAG_FORCED_GEOM \| IDE_DFLAG_PRESENT;
4706a7e0	464	drive->media = ide_disk;
3a7d2484	465	drive->ready_stat = ATA_DRDY;
4706a7e0	466	}
6e87543a BZ	467	}
6e87543a BZ	468
9fd91d95 BZ	469	static unsigned int ide_ignore_cable;
	470
	471	static int ide_set_ignore_cable(const char s, struct kernel_param kp)
	472	{
	473	int i, j = 1;
	474
0af80c04 DF	475	/* controller (ignore) */
0af80c04 DF	476	/* controller : 1 (ignore) \| 0 (use) */
9fd91d95 BZ	477	if (sscanf(s, "%d:%d", &i, &j) != 2 && sscanf(s, "%d", &i) != 1)
	478	return -EINVAL;
	479
	480	if (i >= MAX_HWIFS \|\| j < 0 \|\| j > 1)
	481	return -EINVAL;
	482
	483	if (j)
	484	ide_ignore_cable \|= (1 << i);
	485	else
0af80c04	486	ide_ignore_cable &= ~(1 << i);
9fd91d95 BZ	487
	488	return 0;
	489	}
	490
	491	module_param_call(ignore_cable, ide_set_ignore_cable, NULL, NULL, 0);
	492	MODULE_PARM_DESC(ignore_cable, "ignore cable detection");
	493
	494	void ide_port_apply_params(ide_hwif_t *hwif)
	495	{
2bd24a1c	496	ide_drive_t *drive;
6e87543a BZ	497	int i;
6e87543a BZ	498
9fd91d95 BZ	499	if (ide_ignore_cable & (1 << hwif->index)) {
	500	printk(KERN_INFO "ide: ignoring cable detection for %s\n",
	501	hwif->name);
	502	hwif->cbl = ATA_CBL_PATA40_SHORT;
	503	}
6e87543a	504
2bd24a1c BZ	505	ide_port_for_each_dev(i, drive, hwif)
2bd24a1c BZ	506	ide_dev_apply_params(drive, i);
9fd91d95 BZ	507	}
9fd91d95 BZ	508
1da177e4 LT	509	/*
	510	* This is gets invoked once during initialization, to set everything up
	511	*/
	512	static int __init ide_init(void)
	513	{
349ae23f RD	514	int ret;
349ae23f RD	515
eba8ff94	516	printk(KERN_INFO "Uniform Multi-Platform E-IDE driver\n");
537f06c5	517
349ae23f RD	518	ret = bus_register(&ide_bus_type);
	519	if (ret < 0) {
	520	printk(KERN_WARNING "IDE: bus_register error: %d\n", ret);
	521	return ret;
	522	}
1da177e4	523
f74c9141 BZ	524	ide_port_class = class_create(THIS_MODULE, "ide_port");
	525	if (IS_ERR(ide_port_class)) {
	526	ret = PTR_ERR(ide_port_class);
	527	goto out_port_class;
	528	}
f74c9141	529
5cbf79cd	530	proc_ide_create();
1da177e4	531
1da177e4	532	return 0;
f74c9141 BZ	533
	534	out_port_class:
	535	bus_unregister(&ide_bus_type);
	536
	537	return ret;
1da177e4 LT	538	}
1da177e4 LT	539
931ee0dc	540	static void __exit ide_exit(void)
1da177e4	541	{
1da177e4	542	proc_ide_destroy();
1da177e4	543
f74c9141 BZ	544	class_destroy(ide_port_class);
f74c9141 BZ	545
1da177e4 LT	546	bus_unregister(&ide_bus_type);
	547	}
	548
1da177e4	549	module_init(ide_init);
931ee0dc	550	module_exit(ide_exit);
1da177e4	551
931ee0dc	552	MODULE_LICENSE("GPL");