/* *  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/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_groups	= ide_dev_groups,	.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, const 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 struct kernel_param_ops param_ops_ide_dev_mask = {	.set = ide_set_dev_param_mask}; #define param_check_ide_dev_mask(name, p) param_check_uint(name, p) static unsigned int ide_nodma; module_param_named(nodma, ide_nodma, ide_dev_mask, 0);MODULE_PARM_DESC(nodma, "disallow DMA for a device"); static unsigned int ide_noflush; module_param_named(noflush, ide_noflush, ide_dev_mask, 0);MODULE_PARM_DESC(noflush, "disable flush requests for a device"); static unsigned int ide_nohpa; module_param_named(nohpa, ide_nohpa, ide_dev_mask, 0);MODULE_PARM_DESC(nohpa, "disable Host Protected Area for a device"); static unsigned int ide_noprobe; module_param_named(noprobe, ide_noprobe, ide_dev_mask, 0);MODULE_PARM_DESC(noprobe, "skip probing for a device"); static unsigned int ide_nowerr; module_param_named(nowerr, ide_nowerr, ide_dev_mask, 0);MODULE_PARM_DESC(nowerr, "ignore the ATA_DF bit for a device"); static unsigned int ide_cdroms; module_param_named(cdrom, ide_cdroms, ide_dev_mask, 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");