/* * Copyright (C) 1994-1998 Linus Torvalds & authors (see below) * Copyright (C) 2003-2005, 2007 Bartlomiej Zolnierkiewicz */ /* * Mostly written by Mark Lord * and Gadi Oxman * and Andre Hedrick * * 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 #include #include #include #include #include #include #include #include #include #include #include #include #include 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, 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");