patch-2.3.99-pre1 linux/drivers/block/ide-probe.c

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diff -u --recursive --new-file v2.3.51/linux/drivers/block/ide-probe.c linux/drivers/block/ide-probe.c
@@ -1,929 +0,0 @@
-/*
- *  linux/drivers/block/ide-probe.c	Version 1.05	July 3, 1999
- *
- *  Copyright (C) 1994-1998  Linus Torvalds & authors (see below)
- */
-
-/*
- *  Mostly written by Mark Lord <mlord@pobox.com>
- *                and Gadi Oxman <gadio@netvision.net.il>
- *
- *  See linux/MAINTAINERS for address of current maintainer.
- *
- * This is the IDE probe module, as evolved from hd.c and ide.c.
- *
- * Version 1.00		move drive probing code from ide.c to ide-probe.c
- * Version 1.01		fix compilation problem for m68k
- * Version 1.02		increase WAIT_PIDENTIFY to avoid CD-ROM locking at boot
- *			 by Andrea Arcangeli
- * Version 1.03		fix for (hwif->chipset == ide_4drives)
- * Version 1.04		fixed buggy treatments of known flash memory cards
- *
- * Version 1.05		fix for (hwif->chipset == ide_pdc4030)
- *			added ide6/7/8/9
- *			allowed for secondary flash card to be detectable
- *			 with new flag : drive->ata_flash : 1;
- */
-
-#undef REALLY_SLOW_IO		/* most systems can safely undef this */
-
-#include <linux/config.h>
-#include <linux/module.h>
-#include <linux/types.h>
-#include <linux/string.h>
-#include <linux/kernel.h>
-#include <linux/timer.h>
-#include <linux/mm.h>
-#include <linux/interrupt.h>
-#include <linux/major.h>
-#include <linux/errno.h>
-#include <linux/genhd.h>
-#include <linux/malloc.h>
-#include <linux/delay.h>
-#include <linux/ide.h>
-
-#include <asm/byteorder.h>
-#include <asm/irq.h>
-#include <asm/uaccess.h>
-#include <asm/io.h>
-
-static inline void do_identify (ide_drive_t *drive, byte cmd)
-{
-	int bswap = 1;
-	struct hd_driveid *id;
-
-	id = drive->id = kmalloc (SECTOR_WORDS*4, GFP_ATOMIC);	/* called with interrupts disabled! */
-	ide_input_data(drive, id, SECTOR_WORDS);		/* read 512 bytes of id info */
-	ide__sti();	/* local CPU only */
-	ide_fix_driveid(id);
-	if (!drive->forced_lun)
-		drive->last_lun = id->last_lun & 0x7;
-#if defined (CONFIG_SCSI_EATA_DMA) || defined (CONFIG_SCSI_EATA_PIO) || defined (CONFIG_SCSI_EATA)
-	/*
-	 * EATA SCSI controllers do a hardware ATA emulation:
-	 * Ignore them if there is a driver for them available.
-	 */
-	if ((id->model[0] == 'P' && id->model[1] == 'M')
-	 || (id->model[0] == 'S' && id->model[1] == 'K')) {
-		printk("%s: EATA SCSI HBA %.10s\n", drive->name, id->model);
-		drive->present = 0;
-		return;
-	}
-#endif /* CONFIG_SCSI_EATA_DMA || CONFIG_SCSI_EATA_PIO */
-
-	/*
-	 *  WIN_IDENTIFY returns little-endian info,
-	 *  WIN_PIDENTIFY *usually* returns little-endian info.
-	 */
-	if (cmd == WIN_PIDENTIFY) {
-		if ((id->model[0] == 'N' && id->model[1] == 'E') /* NEC */
-		 || (id->model[0] == 'F' && id->model[1] == 'X') /* Mitsumi */
-		 || (id->model[0] == 'P' && id->model[1] == 'i'))/* Pioneer */
-			bswap ^= 1;	/* Vertos drives may still be weird */
-	}
-	ide_fixstring (id->model,     sizeof(id->model),     bswap);
-	ide_fixstring (id->fw_rev,    sizeof(id->fw_rev),    bswap);
-	ide_fixstring (id->serial_no, sizeof(id->serial_no), bswap);
-
-	if (strstr(id->model, "E X A B Y T E N E S T"))
-		return;
-
-	id->model[sizeof(id->model)-1] = '\0';	/* we depend on this a lot! */
-	printk("%s: %s, ", drive->name, id->model);
-	drive->present = 1;
-
-	/*
-	 * Check for an ATAPI device
-	 */
-	if (cmd == WIN_PIDENTIFY) {
-		byte type = (id->config >> 8) & 0x1f;
-		printk("ATAPI ");
-#ifdef CONFIG_BLK_DEV_PDC4030
-		if (HWIF(drive)->channel == 1 && HWIF(drive)->chipset == ide_pdc4030) {
-			printk(" -- not supported on 2nd Promise port\n");
-			drive->present = 0;
-			return;
-		}
-#endif /* CONFIG_BLK_DEV_PDC4030 */
-		switch (type) {
-			case ide_floppy:
-				if (!strstr(id->model, "CD-ROM")) {
-					if (!strstr(id->model, "oppy") && !strstr(id->model, "poyp") && !strstr(id->model, "ZIP"))
-						printk("cdrom or floppy?, assuming ");
-					if (drive->media != ide_cdrom) {
-						printk ("FLOPPY");
-						break;
-					}
-				}
-				type = ide_cdrom;	/* Early cdrom models used zero */
-			case ide_cdrom:
-				drive->removable = 1;
-#ifdef CONFIG_PPC
-				/* kludge for Apple PowerBook internal zip */
-				if (!strstr(id->model, "CD-ROM") && strstr(id->model, "ZIP")) {
-					printk ("FLOPPY");
-					type = ide_floppy;
-					break;
-				}
-#endif
-				printk ("CDROM");
-				break;
-			case ide_tape:
-				printk ("TAPE");
-				break;
-			case ide_optical:
-				printk ("OPTICAL");
-				drive->removable = 1;
-				break;
-			default:
-				printk("UNKNOWN (type %d)", type);
-				break;
-		}
-		printk (" drive\n");
-		drive->media = type;
-		return;
-	}
-
-	/*
-	 * Not an ATAPI device: looks like a "regular" hard disk
-	 */
-	if (id->config & (1<<7))
-		drive->removable = 1;
-	/*
-	 * Prevent long system lockup probing later for non-existant
-	 * slave drive if the hwif is actually a flash memory card of some variety:
-	 */
-	if (drive_is_flashcard(drive)) {
-		ide_drive_t *mate = &HWIF(drive)->drives[1^drive->select.b.unit];
-		if (!mate->ata_flash) {
-			mate->present = 0;
-			mate->noprobe = 1;
-		}
-	}
-	drive->media = ide_disk;
-	printk("ATA DISK drive\n");
-	return;
-}
-
-/*
- * try_to_identify() sends an ATA(PI) IDENTIFY request to a drive
- * and waits for a response.  It also monitors irqs while this is
- * happening, in hope of automatically determining which one is
- * being used by the interface.
- *
- * Returns:	0  device was identified
- *		1  device timed-out (no response to identify request)
- *		2  device aborted the command (refused to identify itself)
- */
-static int try_to_identify (ide_drive_t *drive, byte cmd)
-{
-	int rc;
-	ide_ioreg_t hd_status;
-	unsigned long timeout;
-	unsigned long irqs = 0;
-	byte s, a;
-
-	if (IDE_CONTROL_REG) {
-		if (!HWIF(drive)->irq) {		/* already got an IRQ? */
-			probe_irq_off(probe_irq_on());	/* clear dangling irqs */
-			irqs = probe_irq_on();		/* start monitoring irqs */
-			OUT_BYTE(drive->ctl,IDE_CONTROL_REG);	/* enable device irq */
-		}
-
-		ide_delay_50ms();				/* take a deep breath */
-		a = IN_BYTE(IDE_ALTSTATUS_REG);
-		s = IN_BYTE(IDE_STATUS_REG);
-		if ((a ^ s) & ~INDEX_STAT) {
-			printk("%s: probing with STATUS(0x%02x) instead of ALTSTATUS(0x%02x)\n", drive->name, s, a);
-			hd_status = IDE_STATUS_REG;	/* ancient Seagate drives, broken interfaces */
-		} else {
-			hd_status = IDE_ALTSTATUS_REG;	/* use non-intrusive polling */
-		}
-	} else {
-		ide_delay_50ms();
-		hd_status = IDE_STATUS_REG;
-	}
-
-#if CONFIG_BLK_DEV_PDC4030
-	if (HWIF(drive)->chipset == ide_pdc4030) {
-		/* DC4030 hosted drives need their own identify... */
-		extern int pdc4030_identify(ide_drive_t *);
-		if (pdc4030_identify(drive)) {
-			if (irqs)
-				(void) probe_irq_off(irqs);
-			return 1;
-		}
-	} else
-#endif /* CONFIG_BLK_DEV_PDC4030 */
-		OUT_BYTE(cmd,IDE_COMMAND_REG);		/* ask drive for ID */
-	timeout = ((cmd == WIN_IDENTIFY) ? WAIT_WORSTCASE : WAIT_PIDENTIFY) / 2;
-	timeout += jiffies;
-	do {
-		if (0 < (signed long)(jiffies - timeout)) {
-			if (irqs)
-				(void) probe_irq_off(irqs);
-			return 1;	/* drive timed-out */
-		}
-		ide_delay_50ms();		/* give drive a breather */
-	} while (IN_BYTE(hd_status) & BUSY_STAT);
-
-	ide_delay_50ms();		/* wait for IRQ and DRQ_STAT */
-	if (OK_STAT(GET_STAT(),DRQ_STAT,BAD_R_STAT)) {
-		unsigned long flags;
-		__save_flags(flags);	/* local CPU only */
-		__cli();		/* local CPU only; some systems need this */
-		do_identify(drive, cmd); /* drive returned ID */
-		rc = 0;			/* drive responded with ID */
-		(void) GET_STAT();	/* clear drive IRQ */
-		__restore_flags(flags);	/* local CPU only */
-	} else
-		rc = 2;			/* drive refused ID */
-	if (IDE_CONTROL_REG && !HWIF(drive)->irq) {
-		irqs = probe_irq_off(irqs);	/* get our irq number */
-		if (irqs > 0) {
-			HWIF(drive)->irq = irqs; /* save it for later */
-			irqs = probe_irq_on();
-			OUT_BYTE(drive->ctl|2,IDE_CONTROL_REG); /* mask device irq */
-			udelay(5);
-			(void) probe_irq_off(irqs);
-			(void) probe_irq_off(probe_irq_on()); /* clear self-inflicted irq */
-			(void) GET_STAT();	/* clear drive IRQ */
-
-		} else {	/* Mmmm.. multiple IRQs.. don't know which was ours */
-			printk("%s: IRQ probe failed (%ld)\n", drive->name, irqs);
-#ifdef CONFIG_BLK_DEV_CMD640
-#ifdef CMD640_DUMP_REGS
-			if (HWIF(drive)->chipset == ide_cmd640) {
-				printk("%s: Hmmm.. probably a driver problem.\n", drive->name);
-				CMD640_DUMP_REGS;
-			}
-#endif /* CMD640_DUMP_REGS */
-#endif /* CONFIG_BLK_DEV_CMD640 */
-		}
-	}
-	return rc;
-}
-
-/*
- * do_probe() has the difficult job of finding a drive if it exists,
- * without getting hung up if it doesn't exist, without trampling on
- * ethernet cards, and without leaving any IRQs dangling to haunt us later.
- *
- * If a drive is "known" to exist (from CMOS or kernel parameters),
- * but does not respond right away, the probe will "hang in there"
- * for the maximum wait time (about 30 seconds), otherwise it will
- * exit much more quickly.
- *
- * Returns:	0  device was identified
- *		1  device timed-out (no response to identify request)
- *		2  device aborted the command (refused to identify itself)
- *		3  bad status from device (possible for ATAPI drives)
- *		4  probe was not attempted because failure was obvious
- */
-static int do_probe (ide_drive_t *drive, byte cmd)
-{
-	int rc;
-	ide_hwif_t *hwif = HWIF(drive);
-	if (drive->present) {	/* avoid waiting for inappropriate probes */
-		if ((drive->media != ide_disk) && (cmd == WIN_IDENTIFY))
-			return 4;
-	}
-#ifdef DEBUG
-	printk("probing for %s: present=%d, media=%d, probetype=%s\n",
-		drive->name, drive->present, drive->media,
-		(cmd == WIN_IDENTIFY) ? "ATA" : "ATAPI");
-#endif
-	ide_delay_50ms();	/* needed for some systems (e.g. crw9624 as drive0 with disk as slave) */
-	SELECT_DRIVE(hwif,drive);
-	ide_delay_50ms();
-	if (IN_BYTE(IDE_SELECT_REG) != drive->select.all && !drive->present) {
-		if (drive->select.b.unit != 0) {
-			SELECT_DRIVE(hwif,&hwif->drives[0]);	/* exit with drive0 selected */
-			ide_delay_50ms();		/* allow BUSY_STAT to assert & clear */
-		}
-		return 3;    /* no i/f present: mmm.. this should be a 4 -ml */
-	}
-
-	if (OK_STAT(GET_STAT(),READY_STAT,BUSY_STAT)
-	 || drive->present || cmd == WIN_PIDENTIFY)
-	{
-		if ((rc = try_to_identify(drive,cmd)))   /* send cmd and wait */
-			rc = try_to_identify(drive,cmd); /* failed: try again */
-		if (rc == 1 && cmd == WIN_PIDENTIFY && drive->autotune != 2) {
-			unsigned long timeout;
-			printk("%s: no response (status = 0x%02x), resetting drive\n", drive->name, GET_STAT());
-			ide_delay_50ms();
-			OUT_BYTE (drive->select.all, IDE_SELECT_REG);
-			ide_delay_50ms();
-			OUT_BYTE(WIN_SRST, IDE_COMMAND_REG);
-			timeout = jiffies;
-			while ((GET_STAT() & BUSY_STAT) && time_before(jiffies, timeout + WAIT_WORSTCASE))
-				ide_delay_50ms();
-			rc = try_to_identify(drive, cmd);
-		}
-		if (rc == 1)
-			printk("%s: no response (status = 0x%02x)\n", drive->name, GET_STAT());
-		(void) GET_STAT();		/* ensure drive irq is clear */
-	} else {
-		rc = 3;				/* not present or maybe ATAPI */
-	}
-	if (drive->select.b.unit != 0) {
-		SELECT_DRIVE(hwif,&hwif->drives[0]);	/* exit with drive0 selected */
-		ide_delay_50ms();
-		(void) GET_STAT();		/* ensure drive irq is clear */
-	}
-	return rc;
-}
-
-/*
- *
- */
-static void enable_nest (ide_drive_t *drive)
-{
-	unsigned long timeout;
-
-	printk("%s: enabling %s -- ", HWIF(drive)->name, drive->id->model);
-	SELECT_DRIVE(HWIF(drive), drive);
-	ide_delay_50ms();
-	OUT_BYTE(EXABYTE_ENABLE_NEST, IDE_COMMAND_REG);
-	timeout = jiffies + WAIT_WORSTCASE;
-	do {
-		if (jiffies > timeout) {
-			printk("failed (timeout)\n");
-			return;
-		}
-		ide_delay_50ms();
-	} while (GET_STAT() & BUSY_STAT);
-	ide_delay_50ms();
-	if (!OK_STAT(GET_STAT(), 0, BAD_STAT))
-		printk("failed (status = 0x%02x)\n", GET_STAT());
-	else
-		printk("success\n");
-	if (do_probe(drive, WIN_IDENTIFY) >= 2) {	/* if !(success||timed-out) */
-		(void) do_probe(drive, WIN_PIDENTIFY);	/* look for ATAPI device */
-	}
-}
-
-/*
- * probe_for_drive() tests for existence of a given drive using do_probe().
- *
- * Returns:	0  no device was found
- *		1  device was found (note: drive->present might still be 0)
- */
-static inline byte probe_for_drive (ide_drive_t *drive)
-{
-	if (drive->noprobe)			/* skip probing? */
-		return drive->present;
-	if (do_probe(drive, WIN_IDENTIFY) >= 2) { /* if !(success||timed-out) */
-		(void) do_probe(drive, WIN_PIDENTIFY); /* look for ATAPI device */
-	}
-	if (drive->id && strstr(drive->id->model, "E X A B Y T E N E S T"))
-		enable_nest(drive);
-	if (!drive->present)
-		return 0;			/* drive not found */
-	if (drive->id == NULL) {		/* identification failed? */
-		if (drive->media == ide_disk) {
-			printk ("%s: non-IDE drive, CHS=%d/%d/%d\n",
-			 drive->name, drive->cyl, drive->head, drive->sect);
-		} else if (drive->media == ide_cdrom) {
-			printk("%s: ATAPI cdrom (?)\n", drive->name);
-		} else {
-			drive->present = 0;	/* nuke it */
-		}
-	}
-	return 1;	/* drive was found */
-}
-
-/*
- * Calculate the region that this interface occupies,
- * handling interfaces where the registers may not be
- * ordered sanely.  We deal with the CONTROL register
- * separately.
- */
-static int hwif_check_regions (ide_hwif_t *hwif)
-{
-	int region_errors = 0;
-
-	hwif->straight8 = 0;
-	region_errors  = ide_check_region(hwif->io_ports[IDE_DATA_OFFSET], 1);
-	region_errors += ide_check_region(hwif->io_ports[IDE_ERROR_OFFSET], 1);
-	region_errors += ide_check_region(hwif->io_ports[IDE_NSECTOR_OFFSET], 1);
-	region_errors += ide_check_region(hwif->io_ports[IDE_SECTOR_OFFSET], 1);
-	region_errors += ide_check_region(hwif->io_ports[IDE_LCYL_OFFSET], 1);
-	region_errors += ide_check_region(hwif->io_ports[IDE_HCYL_OFFSET], 1);
-	region_errors += ide_check_region(hwif->io_ports[IDE_SELECT_OFFSET], 1);
-	region_errors += ide_check_region(hwif->io_ports[IDE_STATUS_OFFSET], 1);
-
-	if (hwif->io_ports[IDE_CONTROL_OFFSET])
-		region_errors += ide_check_region(hwif->io_ports[IDE_CONTROL_OFFSET], 1);
-
-	if (hwif->io_ports[IDE_IRQ_OFFSET])
-		region_errors += ide_check_region(hwif->io_ports[IDE_IRQ_OFFSET], 1);
-
-	/*
-	 * If any errors are return, we drop the hwif interface.
-	 */
-	return(region_errors);
-}
-
-static void hwif_register (ide_hwif_t *hwif)
-{
-	if ((hwif->io_ports[IDE_DATA_OFFSET] | 7) ==
-	    (hwif->io_ports[IDE_STATUS_OFFSET])) {
-		ide_request_region(hwif->io_ports[IDE_DATA_OFFSET], 8, hwif->name);
-		hwif->straight8 = 1;
-		goto jump_straight8;
-	}
-
-	if (hwif->io_ports[IDE_DATA_OFFSET])
-		ide_request_region(hwif->io_ports[IDE_DATA_OFFSET], 1, hwif->name);
-	if (hwif->io_ports[IDE_ERROR_OFFSET])
-		ide_request_region(hwif->io_ports[IDE_ERROR_OFFSET], 1, hwif->name);
-	if (hwif->io_ports[IDE_NSECTOR_OFFSET])
-		ide_request_region(hwif->io_ports[IDE_NSECTOR_OFFSET], 1, hwif->name);
-	if (hwif->io_ports[IDE_SECTOR_OFFSET])
-		ide_request_region(hwif->io_ports[IDE_SECTOR_OFFSET], 1, hwif->name);
-	if (hwif->io_ports[IDE_LCYL_OFFSET])
-		ide_request_region(hwif->io_ports[IDE_LCYL_OFFSET], 1, hwif->name);
-	if (hwif->io_ports[IDE_HCYL_OFFSET])
-		ide_request_region(hwif->io_ports[IDE_HCYL_OFFSET], 1, hwif->name);
-	if (hwif->io_ports[IDE_SELECT_OFFSET])
-		ide_request_region(hwif->io_ports[IDE_SELECT_OFFSET], 1, hwif->name);
-	if (hwif->io_ports[IDE_STATUS_OFFSET])
-		ide_request_region(hwif->io_ports[IDE_STATUS_OFFSET], 1, hwif->name);
-
-jump_straight8:
-	if (hwif->io_ports[IDE_CONTROL_OFFSET])
-		ide_request_region(hwif->io_ports[IDE_CONTROL_OFFSET], 1, hwif->name);
-	if (hwif->io_ports[IDE_IRQ_OFFSET])
-		ide_request_region(hwif->io_ports[IDE_IRQ_OFFSET], 1, hwif->name);
-}
-
-/*
- * This routine only knows how to look for drive units 0 and 1
- * on an interface, so any setting of MAX_DRIVES > 2 won't work here.
- */
-static void probe_hwif (ide_hwif_t *hwif)
-{
-	unsigned int unit;
-	unsigned long flags;
-
-	if (hwif->noprobe)
-		return;
-	if (hwif->io_ports[IDE_DATA_OFFSET] == HD_DATA) {
-		extern void probe_cmos_for_drives(ide_hwif_t *);
-
-		probe_cmos_for_drives (hwif);
-	}
-
-	if ((hwif->chipset != ide_4drives || !hwif->mate->present) &&
-#if CONFIG_BLK_DEV_PDC4030
-	    (hwif->chipset != ide_pdc4030 || hwif->channel == 0) &&
-#endif /* CONFIG_BLK_DEV_PDC4030 */
-	    (hwif_check_regions(hwif))) {
-		int msgout = 0;
-		for (unit = 0; unit < MAX_DRIVES; ++unit) {
-			ide_drive_t *drive = &hwif->drives[unit];
-			if (drive->present) {
-				drive->present = 0;
-				printk("%s: ERROR, PORTS ALREADY IN USE\n", drive->name);
-				msgout = 1;
-			}
-		}
-		if (!msgout)
-			printk("%s: ports already in use, skipping probe\n", hwif->name);
-		return;	
-	}
-
-	__save_flags(flags);	/* local CPU only */
-	__sti();		/* local CPU only; needed for jiffies and irq probing */
-	/*
-	 * Second drive should only exist if first drive was found,
-	 * but a lot of cdrom drives are configured as single slaves.
-	 */
-	for (unit = 0; unit < MAX_DRIVES; ++unit) {
-		ide_drive_t *drive = &hwif->drives[unit];
-		(void) probe_for_drive (drive);
-		if (drive->present && !hwif->present) {
-			hwif->present = 1;
-			if (hwif->chipset != ide_4drives || !hwif->mate->present) {
-				hwif_register(hwif);
-			}
-		}
-	}
-	if (hwif->io_ports[IDE_CONTROL_OFFSET] && hwif->reset) {
-		unsigned long timeout = jiffies + WAIT_WORSTCASE;
-		byte stat;
-
-		printk("%s: reset\n", hwif->name);
-		OUT_BYTE(12, hwif->io_ports[IDE_CONTROL_OFFSET]);
-		udelay(10);
-		OUT_BYTE(8, hwif->io_ports[IDE_CONTROL_OFFSET]);
-		do {
-			ide_delay_50ms();
-			stat = IN_BYTE(hwif->io_ports[IDE_STATUS_OFFSET]);
-		} while ((stat & BUSY_STAT) && 0 < (signed long)(timeout - jiffies));
-
-	}
-	__restore_flags(flags);	/* local CPU only */
-	for (unit = 0; unit < MAX_DRIVES; ++unit) {
-		ide_drive_t *drive = &hwif->drives[unit];
-		if (drive->present) {
-			ide_tuneproc_t *tuneproc = HWIF(drive)->tuneproc;
-			if (tuneproc != NULL && drive->autotune == 1)
-				tuneproc(drive, 255);	/* auto-tune PIO mode */
-		}
-	}
-}
-
-#if MAX_HWIFS > 1
-/*
- * save_match() is used to simplify logic in init_irq() below.
- *
- * A loophole here is that we may not know about a particular
- * hwif's irq until after that hwif is actually probed/initialized..
- * This could be a problem for the case where an hwif is on a
- * dual interface that requires serialization (eg. cmd640) and another
- * hwif using one of the same irqs is initialized beforehand.
- *
- * This routine detects and reports such situations, but does not fix them.
- */
-static void save_match (ide_hwif_t *hwif, ide_hwif_t *new, ide_hwif_t **match)
-{
-	ide_hwif_t *m = *match;
-
-	if (m && m->hwgroup && m->hwgroup != new->hwgroup) {
-		if (!new->hwgroup)
-			return;
-		printk("%s: potential irq problem with %s and %s\n", hwif->name, new->name, m->name);
-	}
-	if (!m || m->irq != hwif->irq) /* don't undo a prior perfect match */
-		*match = new;
-}
-#endif /* MAX_HWIFS > 1 */
-
-/*
- * This routine sets up the irq for an ide interface, and creates a new
- * hwgroup for the irq/hwif if none was previously assigned.
- *
- * Much of the code is for correctly detecting/handling irq sharing
- * and irq serialization situations.  This is somewhat complex because
- * it handles static as well as dynamic (PCMCIA) IDE interfaces.
- *
- * The SA_INTERRUPT in sa_flags means ide_intr() is always entered with
- * interrupts completely disabled.  This can be bad for interrupt latency,
- * but anything else has led to problems on some machines.  We re-enable
- * interrupts as much as we can safely do in most places.
- */
-static int init_irq (ide_hwif_t *hwif)
-{
-	unsigned long flags;
-	unsigned int index;
-	ide_hwgroup_t *hwgroup;
-	ide_hwif_t *match = NULL;
-
-	save_flags(flags);	/* all CPUs */
-	cli();			/* all CPUs */
-
-	hwif->hwgroup = NULL;
-#if MAX_HWIFS > 1
-	/*
-	 * Group up with any other hwifs that share our irq(s).
-	 */
-	for (index = 0; index < MAX_HWIFS; index++) {
-		ide_hwif_t *h = &ide_hwifs[index];
-		if (h->hwgroup) {  /* scan only initialized hwif's */
-			if (hwif->irq == h->irq) {
-				hwif->sharing_irq = h->sharing_irq = 1;
-				if (hwif->chipset != ide_pci || h->chipset != ide_pci) {
-					save_match(hwif, h, &match);
-				}
-			}
-			if (hwif->serialized) {
-				if (hwif->mate && hwif->mate->irq == h->irq)
-					save_match(hwif, h, &match);
-			}
-			if (h->serialized) {
-				if (h->mate && hwif->irq == h->mate->irq)
-					save_match(hwif, h, &match);
-			}
-		}
-	}
-#endif /* MAX_HWIFS > 1 */
-	/*
-	 * If we are still without a hwgroup, then form a new one
-	 */
-	if (match) {
-		hwgroup = match->hwgroup;
-	} else {
-		hwgroup = kmalloc(sizeof(ide_hwgroup_t), GFP_KERNEL);
-		memset(hwgroup, 0, sizeof(ide_hwgroup_t));
-		hwgroup->hwif     = hwif->next = hwif;
-		hwgroup->rq       = NULL;
-		hwgroup->handler  = NULL;
-		hwgroup->drive    = NULL;
-		hwgroup->busy     = 0;
-		init_timer(&hwgroup->timer);
-		hwgroup->timer.function = &ide_timer_expiry;
-		hwgroup->timer.data = (unsigned long) hwgroup;
-	}
-
-	/*
-	 * Allocate the irq, if not already obtained for another hwif
-	 */
-	if (!match || match->irq != hwif->irq) {
-#ifdef CONFIG_IDEPCI_SHARE_IRQ
-		int sa = (hwif->chipset == ide_pci) ? SA_SHIRQ : SA_INTERRUPT;
-#else /* !CONFIG_IDEPCI_SHARE_IRQ */
-		int sa = (hwif->chipset == ide_pci) ? SA_INTERRUPT|SA_SHIRQ : SA_INTERRUPT;
-#endif /* CONFIG_IDEPCI_SHARE_IRQ */
-		if (ide_request_irq(hwif->irq, &ide_intr, sa, hwif->name, hwgroup)) {
-			if (!match)
-				kfree(hwgroup);
-			restore_flags(flags);	/* all CPUs */
-			return 1;
-		}
-	}
-
-	/*
-	 * Everything is okay, so link us into the hwgroup
-	 */
-	hwif->hwgroup = hwgroup;
-	hwif->next = hwgroup->hwif->next;
-	hwgroup->hwif->next = hwif;
-
-	for (index = 0; index < MAX_DRIVES; ++index) {
-		ide_drive_t *drive = &hwif->drives[index];
-		if (!drive->present)
-			continue;
-		if (!hwgroup->drive)
-			hwgroup->drive = drive;
-		drive->next = hwgroup->drive->next;
-		hwgroup->drive->next = drive;
-	}
-	if (!hwgroup->hwif) {
-		hwgroup->hwif = HWIF(hwgroup->drive);
-#ifdef DEBUG
-		printk("%s : Adding missed hwif to hwgroup!!\n", hwif->name);
-#endif
-	}
-	restore_flags(flags);	/* all CPUs; safe now that hwif->hwgroup is set up */
-
-#if !defined(__mc68000__) && !defined(CONFIG_APUS) && !defined(__sparc__)
-	printk("%s at 0x%03x-0x%03x,0x%03x on irq %d", hwif->name,
-		hwif->io_ports[IDE_DATA_OFFSET],
-		hwif->io_ports[IDE_DATA_OFFSET]+7,
-		hwif->io_ports[IDE_CONTROL_OFFSET], hwif->irq);
-#elif defined(__sparc__)
-	printk("%s at 0x%03lx-0x%03lx,0x%03lx on irq %s", hwif->name,
-		hwif->io_ports[IDE_DATA_OFFSET],
-		hwif->io_ports[IDE_DATA_OFFSET]+7,
-		hwif->io_ports[IDE_CONTROL_OFFSET], __irq_itoa(hwif->irq));
-#else
-	printk("%s at %p on irq 0x%08x", hwif->name,
-		hwif->io_ports[IDE_DATA_OFFSET], hwif->irq);
-#endif /* __mc68000__ && CONFIG_APUS */
-	if (match)
-		printk(" (%sed with %s)",
-			hwif->sharing_irq ? "shar" : "serializ", match->name);
-	printk("\n");
-	return 0;
-}
-
-/*
- * init_gendisk() (as opposed to ide_geninit) is called for each major device,
- * after probing for drives, to allocate partition tables and other data
- * structures needed for the routines in genhd.c.  ide_geninit() gets called
- * somewhat later, during the partition check.
- */
-static void init_gendisk (ide_hwif_t *hwif)
-{
-	struct gendisk *gd, **gdp;
-	unsigned int unit, units, minors;
-	int *bs, *max_sect, *max_ra;
-	extern devfs_handle_t ide_devfs_handle;
-
-	/* figure out maximum drive number on the interface */
-	for (units = MAX_DRIVES; units > 0; --units) {
-		if (hwif->drives[units-1].present)
-			break;
-	}
-	minors    = units * (1<<PARTN_BITS);
-	gd        = kmalloc (sizeof(struct gendisk), GFP_KERNEL);
-	gd->sizes = kmalloc (minors * sizeof(int), GFP_KERNEL);
-	gd->part  = kmalloc (minors * sizeof(struct hd_struct), GFP_KERNEL);
-	bs        = kmalloc (minors*sizeof(int), GFP_KERNEL);
-	max_sect  = kmalloc (minors*sizeof(int), GFP_KERNEL);
-	max_ra    = kmalloc (minors*sizeof(int), GFP_KERNEL);
-
-	memset(gd->part, 0, minors * sizeof(struct hd_struct));
-
-	/* cdroms and msdos f/s are examples of non-1024 blocksizes */
-	blksize_size[hwif->major] = bs;
-	max_sectors[hwif->major] = max_sect;
-	max_readahead[hwif->major] = max_ra;
-	for (unit = 0; unit < minors; ++unit) {
-		*bs++ = BLOCK_SIZE;
-#ifdef CONFIG_BLK_DEV_PDC4030
-		*max_sect++ = ((hwif->chipset == ide_pdc4030) ? 127 : MAX_SECTORS);
-#else
-		*max_sect++ = MAX_SECTORS;
-#endif
-		*max_ra++ = MAX_READAHEAD;
-	}
-
-	for (unit = 0; unit < units; ++unit)
-		hwif->drives[unit].part = &gd->part[unit << PARTN_BITS];
-
-	gd->major	= hwif->major;		/* our major device number */
-	gd->major_name	= IDE_MAJOR_NAME;	/* treated special in genhd.c */
-	gd->minor_shift	= PARTN_BITS;		/* num bits for partitions */
-	gd->max_p	= 1<<PARTN_BITS;	/* 1 + max partitions / drive */
-	gd->nr_real	= units;		/* current num real drives */
-	gd->real_devices= hwif;			/* ptr to internal data */
-	gd->next	= NULL;			/* linked list of major devs */
-	gd->fops        = ide_fops;             /* file operations */
-	gd->de_arr	= kmalloc (sizeof *gd->de_arr * units, GFP_KERNEL);
-	gd->flags	= kmalloc (sizeof *gd->flags * units, GFP_KERNEL);
-	if (gd->de_arr)
-		memset (gd->de_arr, 0, sizeof *gd->de_arr * units);
-	if (gd->flags)
-		memset (gd->flags, 0, sizeof *gd->flags * units);
-
-	for (gdp = &gendisk_head; *gdp; gdp = &((*gdp)->next)) ;
-	hwif->gd = *gdp = gd;			/* link onto tail of list */
-
-	for (unit = 0; unit < units; ++unit) {
-		if (hwif->drives[unit].present) {
-			char name[64];
-
-			ide_add_generic_settings(hwif->drives + unit);
-			sprintf (name, "host%d/bus%d/target%d/lun%d",
-				 (hwif->channel && hwif->mate) ? hwif->mate->index : hwif->index,
-				 hwif->channel, unit, 0);
-			hwif->drives[unit].de =
-				devfs_mk_dir (ide_devfs_handle, name, 0, NULL);
-		}
-	}
-}
-
-static int hwif_init (ide_hwif_t *hwif)
-{
-	ide_drive_t *drive;
-	void (*rfn)(request_queue_t *);
-	
-	if (!hwif->present)
-		return 0;
-	if (!hwif->irq) {
-		if (!(hwif->irq = ide_default_irq(hwif->io_ports[IDE_DATA_OFFSET])))
-		{
-			printk("%s: DISABLED, NO IRQ\n", hwif->name);
-			return (hwif->present = 0);
-		}
-	}
-#ifdef CONFIG_BLK_DEV_HD
-	if (hwif->irq == HD_IRQ && hwif->io_ports[IDE_DATA_OFFSET] != HD_DATA) {
-		printk("%s: CANNOT SHARE IRQ WITH OLD HARDDISK DRIVER (hd.c)\n", hwif->name);
-		return (hwif->present = 0);
-	}
-#endif /* CONFIG_BLK_DEV_HD */
-	
-	hwif->present = 0; /* we set it back to 1 if all is ok below */
-	switch (hwif->major) {
-	case IDE0_MAJOR: rfn = &do_ide0_request; break;
-#if MAX_HWIFS > 1
-	case IDE1_MAJOR: rfn = &do_ide1_request; break;
-#endif
-#if MAX_HWIFS > 2
-	case IDE2_MAJOR: rfn = &do_ide2_request; break;
-#endif
-#if MAX_HWIFS > 3
-	case IDE3_MAJOR: rfn = &do_ide3_request; break;
-#endif
-#if MAX_HWIFS > 4
-	case IDE4_MAJOR: rfn = &do_ide4_request; break;
-#endif
-#if MAX_HWIFS > 5
-	case IDE5_MAJOR: rfn = &do_ide5_request; break;
-#endif
-#if MAX_HWIFS > 6
-	case IDE6_MAJOR: rfn = &do_ide6_request; break;
-#endif
-#if MAX_HWIFS > 7
-	case IDE7_MAJOR: rfn = &do_ide7_request; break;
-#endif
-#if MAX_HWIFS > 8
-	case IDE8_MAJOR: rfn = &do_ide8_request; break;
-#endif
-#if MAX_HWIFS > 9
-	case IDE9_MAJOR: rfn = &do_ide9_request; break;
-#endif
-	default:
-		printk("%s: request_fn NOT DEFINED\n", hwif->name);
-		return (hwif->present = 0);
-	}
-	if (devfs_register_blkdev (hwif->major, hwif->name, ide_fops)) {
-		printk("%s: UNABLE TO GET MAJOR NUMBER %d\n", hwif->name, hwif->major);
-		return (hwif->present = 0);
-	}
-	
-	if (init_irq(hwif)) {
-		int i = hwif->irq;
-		/*
-		 *	It failed to initialise. Find the default IRQ for 
-		 *	this port and try that.
-		 */
-		if (!(hwif->irq = ide_default_irq(hwif->io_ports[IDE_DATA_OFFSET]))) {
-			printk("%s: Disabled unable to get IRQ %d.\n", hwif->name, i);
-			(void) unregister_blkdev (hwif->major, hwif->name);
-			return (hwif->present = 0);
-		}
-		if (init_irq(hwif)) {
-			printk("%s: probed IRQ %d and default IRQ %d failed.\n",
-				hwif->name, i, hwif->irq);
-			(void) unregister_blkdev (hwif->major, hwif->name);
-			return (hwif->present = 0);
-		}
-		printk("%s: probed IRQ %d failed, using default.\n",
-			hwif->name, hwif->irq);
-	}
-	
-	init_gendisk(hwif);
-	blk_dev[hwif->major].data = hwif;
-	blk_dev[hwif->major].queue = ide_get_queue;
-	read_ahead[hwif->major] = 8;	/* (4kB) */
-	hwif->present = 1;	/* success */
-
-	/*
-	 * FIXME(eric) - This needs to be tested.  I *think* that this
-	 * is correct.   Also, I believe that there is no longer any
-	 * reason to have multiple functions (do_ide[0-7]_request)
-	 * functions - the queuedata field could be used to indicate
-	 * the correct hardware group - either this, or we could add
-	 * a new field to request_queue_t to hold this information.
-	 */
-	drive = &hwif->drives[0];
-	blk_init_queue(&drive->queue, rfn);
-
-	drive = &hwif->drives[1];
-	blk_init_queue(&drive->queue, rfn);
-
-#if (DEBUG_SPINLOCK > 0)
-{
-	static int done = 0;
-	if (!done++)
-		printk("io_request_lock is %p\n", &io_request_lock);    /* FIXME */
-}
-#endif
-	return hwif->present;
-}
-
-int ideprobe_init (void);
-static ide_module_t ideprobe_module = {
-	IDE_PROBE_MODULE,
-	ideprobe_init,
-	NULL
-};
-
-int ideprobe_init (void)
-{
-	unsigned int index;
-	int probe[MAX_HWIFS];
-	
-	MOD_INC_USE_COUNT;
-	memset(probe, 0, MAX_HWIFS * sizeof(int));
-	for (index = 0; index < MAX_HWIFS; ++index)
-		probe[index] = !ide_hwifs[index].present;
-
-	/*
-	 * Probe for drives in the usual way.. CMOS/BIOS, then poke at ports
-	 */
-	for (index = 0; index < MAX_HWIFS; ++index)
-		if (probe[index])
-			probe_hwif(&ide_hwifs[index]);
-	for (index = 0; index < MAX_HWIFS; ++index)
-		if (probe[index])
-			hwif_init(&ide_hwifs[index]);
-	if (!ide_probe)
-		ide_probe = &ideprobe_module;
-	MOD_DEC_USE_COUNT;
-	return 0;
-}
-
-#ifdef MODULE
-int init_module (void)
-{
-	unsigned int index;
-	
-	for (index = 0; index < MAX_HWIFS; ++index)
-		ide_unregister(index);
-	ideprobe_init();
-	create_proc_ide_interfaces();
-	return 0;
-}
-
-void cleanup_module (void)
-{
-	ide_probe = NULL;
-}
-#endif /* MODULE */
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TCL-scripts by Sam Shen (who was at: slshen@lbl.gov)