ide.c

linux 内核源代码

	if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e')
		goto bad_option;
	/*
	 * Look for bus speed option:  "idebus="
	 */
	if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') {
		if (match_parm(&s[6], NULL, vals, 1) != 1)
			goto bad_option;
		if (vals[0] >= 20 && vals[0] <= 66) {
			idebus_parameter = vals[0];
		} else
			printk(" -- BAD BUS SPEED! Expected value from 20 to 66");
		goto done;
	}
	/*
	 * Look for interface options:  "idex="
	 */
	if (s[3] >= '0' && s[3] <= max_hwif) {
		/*
		 * Be VERY CAREFUL changing this: note hardcoded indexes below
		 * (-8, -9, -10) are reserved to ease the hardcoding.
		 */
		static const char *ide_words[] = {
			"noprobe", "serialize", "minus3", "minus4",
			"reset", "minus6", "ata66", "minus8", "minus9",
			"minus10", "four", "qd65xx", "ht6560b", "cmd640_vlb",
			"dtc2278", "umc8672", "ali14xx", NULL };

		hw_regs_t hwregs;

		hw = s[3] - '0';
		hwif = &ide_hwifs[hw];
		i = match_parm(&s[4], ide_words, vals, 3);

		/*
		 * Cryptic check to ensure chipset not already set for hwif.
		 * Note: we can't depend on hwif->chipset here.
		 */
		if ((i >= -18 && i <= -11) || (i > 0 && i <= 3)) {
			/* chipset already specified */
			if (is_chipset_set[hw])
				goto bad_option;
			if (i > -18 && i <= -11) {
				/* these drivers are for "ide0=" only */
				if (hw != 0)
					goto bad_hwif;
				/* chipset already specified for 2nd port */
				if (is_chipset_set[hw+1])
					goto bad_option;
			}
			is_chipset_set[hw] = 1;
			printk("\n");
		}

		switch (i) {
#ifdef CONFIG_BLK_DEV_ALI14XX
			case -17: /* "ali14xx" */
				probe_ali14xx = 1;
				goto done;
#endif
#ifdef CONFIG_BLK_DEV_UMC8672
			case -16: /* "umc8672" */
				probe_umc8672 = 1;
				goto done;
#endif
#ifdef CONFIG_BLK_DEV_DTC2278
			case -15: /* "dtc2278" */
				probe_dtc2278 = 1;
				goto done;
#endif
#ifdef CONFIG_BLK_DEV_CMD640
			case -14: /* "cmd640_vlb" */
			{
				extern int cmd640_vlb; /* flag for cmd640.c */
				cmd640_vlb = 1;
				goto done;
			}
#endif
#ifdef CONFIG_BLK_DEV_HT6560B
			case -13: /* "ht6560b" */
				probe_ht6560b = 1;
				goto done;
#endif
#ifdef CONFIG_BLK_DEV_QD65XX
			case -12: /* "qd65xx" */
				probe_qd65xx = 1;
				goto done;
#endif
#ifdef CONFIG_BLK_DEV_4DRIVES
			case -11: /* "four" drives on one set of ports */
			{
				ide_hwif_t *mate = &ide_hwifs[hw^1];
				mate->drives[0].select.all ^= 0x20;
				mate->drives[1].select.all ^= 0x20;
				hwif->chipset = mate->chipset = ide_4drives;
				mate->irq = hwif->irq;
				memcpy(mate->io_ports, hwif->io_ports, sizeof(hwif->io_ports));
				hwif->mate = mate;
				mate->mate = hwif;
				hwif->serialized = mate->serialized = 1;
				goto obsolete_option;
			}
#endif /* CONFIG_BLK_DEV_4DRIVES */
			case -10: /* minus10 */
			case -9: /* minus9 */
			case -8: /* minus8 */
			case -6:
			case -4:
			case -3:
				goto bad_option;
			case -7: /* ata66 */
#ifdef CONFIG_BLK_DEV_IDEPCI
				/*
				 * Use ATA_CBL_PATA40_SHORT so drive side
				 * cable detection is also overriden.
				 */
				hwif->cbl = ATA_CBL_PATA40_SHORT;
				goto obsolete_option;
#else
				goto bad_hwif;
#endif
			case -5: /* "reset" */
				hwif->reset = 1;
				goto obsolete_option;
			case -2: /* "serialize" */
				hwif->mate = &ide_hwifs[hw^1];
				hwif->mate->mate = hwif;
				hwif->serialized = hwif->mate->serialized = 1;
				goto obsolete_option;

			case -1: /* "noprobe" */
				hwif->noprobe = 1;
				goto done;

			case 1:	/* base */
				vals[1] = vals[0] + 0x206; /* default ctl */
			case 2: /* base,ctl */
				vals[2] = 0;	/* default irq = probe for it */
			case 3: /* base,ctl,irq */
				memset(&hwregs, 0, sizeof(hwregs));
				ide_init_hwif_ports(&hwregs, vals[0], vals[1], &hwif->irq);
				memcpy(hwif->io_ports, hwregs.io_ports, sizeof(hwif->io_ports));
				hwif->irq      = vals[2];
				hwif->noprobe  = 0;
				hwif->chipset  = ide_forced;
				goto obsolete_option;

			case 0: goto bad_option;
			default:
				printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n");
				return 1;
		}
	}
bad_option:
	printk(" -- BAD OPTION\n");
	return 1;
obsolete_option:
	printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n");
	return 1;
bad_hwif:
	printk("-- NOT SUPPORTED ON ide%d", hw);
done:
	printk("\n");
	return 1;
}

extern void __init pnpide_init(void);
extern void __exit pnpide_exit(void);
extern void __init h8300_ide_init(void);

/*
 * probe_for_hwifs() finds/initializes "known" IDE interfaces
 */
static void __init probe_for_hwifs (void)
{
#ifdef CONFIG_IDEPCI_PCIBUS_ORDER
	ide_scan_pcibus(ide_scan_direction);
#endif

#ifdef CONFIG_ETRAX_IDE
	{
		extern void init_e100_ide(void);
		init_e100_ide();
	}
#endif /* CONFIG_ETRAX_IDE */
#ifdef CONFIG_BLK_DEV_CMD640
	{
		extern void ide_probe_for_cmd640x(void);
		ide_probe_for_cmd640x();
	}
#endif /* CONFIG_BLK_DEV_CMD640 */
#ifdef CONFIG_BLK_DEV_IDE_PMAC
	{
		extern int pmac_ide_probe(void);
		(void)pmac_ide_probe();
	}
#endif /* CONFIG_BLK_DEV_IDE_PMAC */
#ifdef CONFIG_BLK_DEV_GAYLE
	{
		extern void gayle_init(void);
		gayle_init();
	}
#endif /* CONFIG_BLK_DEV_GAYLE */
#ifdef CONFIG_BLK_DEV_FALCON_IDE
	{
		extern void falconide_init(void);
		falconide_init();
	}
#endif /* CONFIG_BLK_DEV_FALCON_IDE */
#ifdef CONFIG_BLK_DEV_MAC_IDE
	{
		extern void macide_init(void);
		macide_init();
	}
#endif /* CONFIG_BLK_DEV_MAC_IDE */
#ifdef CONFIG_BLK_DEV_Q40IDE
	{
		extern void q40ide_init(void);
		q40ide_init();
	}
#endif /* CONFIG_BLK_DEV_Q40IDE */
#ifdef CONFIG_BLK_DEV_BUDDHA
	{
		extern void buddha_init(void);
		buddha_init();
	}
#endif /* CONFIG_BLK_DEV_BUDDHA */
#ifdef CONFIG_BLK_DEV_IDEPNP
	pnpide_init();
#endif
#ifdef CONFIG_H8300
	h8300_ide_init();
#endif
}

/*
 * Probe module
 */

EXPORT_SYMBOL(ide_lock);

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

static char *media_string(ide_drive_t *drive)
{
	switch (drive->media) {
	case ide_disk:
		return "disk";
	case ide_cdrom:
		return "cdrom";
	case ide_tape:
		return "tape";
	case ide_floppy:
		return "floppy";
	case ide_optical:
		return "optical";
	default:
		return "UNKNOWN";
	}
}

static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf)
{
	ide_drive_t *drive = to_ide_device(dev);
	return sprintf(buf, "%s\n", media_string(drive));
}

static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf)
{
	ide_drive_t *drive = to_ide_device(dev);
	return sprintf(buf, "%s\n", drive->name);
}

static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
{
	ide_drive_t *drive = to_ide_device(dev);
	return sprintf(buf, "ide:m-%s\n", media_string(drive));
}

static ssize_t model_show(struct device *dev, struct device_attribute *attr,
			  char *buf)
{
	ide_drive_t *drive = to_ide_device(dev);
	return sprintf(buf, "%s\n", drive->id->model);
}

static ssize_t firmware_show(struct device *dev, struct device_attribute *attr,
			     char *buf)
{
	ide_drive_t *drive = to_ide_device(dev);
	return sprintf(buf, "%s\n", drive->id->fw_rev);
}

static ssize_t serial_show(struct device *dev, struct device_attribute *attr,
			   char *buf)
{
	ide_drive_t *drive = to_ide_device(dev);
	return sprintf(buf, "%s\n", drive->id->serial_no);
}

static struct device_attribute ide_dev_attrs[] = {
	__ATTR_RO(media),
	__ATTR_RO(drivename),
	__ATTR_RO(modalias),
	__ATTR_RO(model),
	__ATTR_RO(firmware),
	__ATTR(serial, 0400, serial_show, NULL),
	__ATTR_NULL
};

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

static int generic_ide_probe(struct device *dev)
{
	ide_drive_t *drive = to_ide_device(dev);
	ide_driver_t *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);
	ide_driver_t *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);
	ide_driver_t *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);

/*
 * 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 " REVISION "\n");
	system_bus_speed = ide_system_bus_speed();

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

	init_ide_data();

	proc_ide_create();

#ifdef CONFIG_BLK_DEV_ALI14XX
	if (probe_ali14xx)
		(void)ali14xx_init();
#endif
#ifdef CONFIG_BLK_DEV_UMC8672
	if (probe_umc8672)
		(void)umc8672_init();
#endif
#ifdef CONFIG_BLK_DEV_DTC2278
	if (probe_dtc2278)
		(void)dtc2278_init();
#endif
#ifdef CONFIG_BLK_DEV_HT6560B
	if (probe_ht6560b)
		(void)ht6560b_init();
#endif
#ifdef CONFIG_BLK_DEV_QD65XX
	if (probe_qd65xx)
		(void)qd65xx_init();
#endif

	/* Probe for special PCI and other "known" interface chipsets. */
	probe_for_hwifs();

	return 0;
}

#ifdef MODULE
static char *options = NULL;
module_param(options, charp, 0);
MODULE_LICENSE("GPL");

static void __init parse_options (char *line)
{
	char *next = line;

	if (line == NULL || !*line)
		return;
	while ((line = next) != NULL) {
 		if ((next = strchr(line,' ')) != NULL)
			*next++ = 0;
		if (!ide_setup(line))
			printk (KERN_INFO "Unknown option '%s'\n", line);
	}
}

int __init init_module (void)
{
	parse_options(options);
	return ide_init();
}

void __exit cleanup_module (void)
{
	int index;

	for (index = 0; index < MAX_HWIFS; ++index)
		ide_unregister(index);

#ifdef CONFIG_BLK_DEV_IDEPNP
	pnpide_exit();
#endif

	proc_ide_destroy();

	bus_unregister(&ide_bus_type);
}

#else /* !MODULE */

__setup("", ide_setup);

module_init(ide_init);

#endif /* MODULE */