Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/drivers/ide/ide-probe.c b/drivers/ide/ide-probe.c
new file mode 100644
index 0000000..554473a
--- /dev/null
+++ b/drivers/ide/ide-probe.c
@@ -0,0 +1,1421 @@
+/*
+ * linux/drivers/ide/ide-probe.c Version 1.11 Mar 05, 2003
+ *
+ * Copyright (C) 1994-1998 Linus Torvalds & authors (see below)
+ */
+
+/*
+ * 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 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;
+ * Version 1.06 stream line request queue and prep for cascade project.
+ * Version 1.07 max_sect <= 255; slower disks would get behind and
+ * then fall over when they get to 256. Paul G.
+ * Version 1.10 Update set for new IDE. drive->id is now always
+ * valid after probe time even with noprobe
+ */
+
+#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/slab.h>
+#include <linux/delay.h>
+#include <linux/ide.h>
+#include <linux/spinlock.h>
+#include <linux/kmod.h>
+#include <linux/pci.h>
+
+#include <asm/byteorder.h>
+#include <asm/irq.h>
+#include <asm/uaccess.h>
+#include <asm/io.h>
+
+/**
+ * generic_id - add a generic drive id
+ * @drive: drive to make an ID block for
+ *
+ * Add a fake id field to the drive we are passed. This allows
+ * use to skip a ton of NULL checks (which people always miss)
+ * and make drive properties unconditional outside of this file
+ */
+
+static void generic_id(ide_drive_t *drive)
+{
+ drive->id->cyls = drive->cyl;
+ drive->id->heads = drive->head;
+ drive->id->sectors = drive->sect;
+ drive->id->cur_cyls = drive->cyl;
+ drive->id->cur_heads = drive->head;
+ drive->id->cur_sectors = drive->sect;
+}
+
+static void ide_disk_init_chs(ide_drive_t *drive)
+{
+ struct hd_driveid *id = drive->id;
+
+ /* Extract geometry if we did not already have one for the drive */
+ if (!drive->cyl || !drive->head || !drive->sect) {
+ drive->cyl = drive->bios_cyl = id->cyls;
+ drive->head = drive->bios_head = id->heads;
+ drive->sect = drive->bios_sect = id->sectors;
+ }
+
+ /* Handle logical geometry translation by the drive */
+ if ((id->field_valid & 1) && id->cur_cyls &&
+ id->cur_heads && (id->cur_heads <= 16) && id->cur_sectors) {
+ drive->cyl = id->cur_cyls;
+ drive->head = id->cur_heads;
+ drive->sect = id->cur_sectors;
+ }
+
+ /* Use physical geometry if what we have still makes no sense */
+ if (drive->head > 16 && id->heads && id->heads <= 16) {
+ drive->cyl = id->cyls;
+ drive->head = id->heads;
+ drive->sect = id->sectors;
+ }
+}
+
+static void ide_disk_init_mult_count(ide_drive_t *drive)
+{
+ struct hd_driveid *id = drive->id;
+
+ drive->mult_count = 0;
+ if (id->max_multsect) {
+#ifdef CONFIG_IDEDISK_MULTI_MODE
+ id->multsect = ((id->max_multsect/2) > 1) ? id->max_multsect : 0;
+ id->multsect_valid = id->multsect ? 1 : 0;
+ drive->mult_req = id->multsect_valid ? id->max_multsect : INITIAL_MULT_COUNT;
+ drive->special.b.set_multmode = drive->mult_req ? 1 : 0;
+#else /* original, pre IDE-NFG, per request of AC */
+ drive->mult_req = INITIAL_MULT_COUNT;
+ if (drive->mult_req > id->max_multsect)
+ drive->mult_req = id->max_multsect;
+ if (drive->mult_req || ((id->multsect_valid & 1) && id->multsect))
+ drive->special.b.set_multmode = 1;
+#endif
+ }
+}
+
+/**
+ * drive_is_flashcard - check for compact flash
+ * @drive: drive to check
+ *
+ * CompactFlash cards and their brethern pretend to be removable
+ * hard disks, except:
+ * (1) they never have a slave unit, and
+ * (2) they don't have doorlock mechanisms.
+ * This test catches them, and is invoked elsewhere when setting
+ * appropriate config bits.
+ *
+ * FIXME: This treatment is probably applicable for *all* PCMCIA (PC CARD)
+ * devices, so in linux 2.3.x we should change this to just treat all
+ * PCMCIA drives this way, and get rid of the model-name tests below
+ * (too big of an interface change for 2.4.x).
+ * At that time, we might also consider parameterizing the timeouts and
+ * retries, since these are MUCH faster than mechanical drives. -M.Lord
+ */
+
+static inline int drive_is_flashcard (ide_drive_t *drive)
+{
+ struct hd_driveid *id = drive->id;
+
+ if (drive->removable) {
+ if (id->config == 0x848a) return 1; /* CompactFlash */
+ if (!strncmp(id->model, "KODAK ATA_FLASH", 15) /* Kodak */
+ || !strncmp(id->model, "Hitachi CV", 10) /* Hitachi */
+ || !strncmp(id->model, "SunDisk SDCFB", 13) /* old SanDisk */
+ || !strncmp(id->model, "SanDisk SDCFB", 13) /* SanDisk */
+ || !strncmp(id->model, "HAGIWARA HPC", 12) /* Hagiwara */
+ || !strncmp(id->model, "LEXAR ATA_FLASH", 15) /* Lexar */
+ || !strncmp(id->model, "ATA_FLASH", 9)) /* Simple Tech */
+ {
+ return 1; /* yes, it is a flash memory card */
+ }
+ }
+ return 0; /* no, it is not a flash memory card */
+}
+
+/**
+ * do_identify - identify a drive
+ * @drive: drive to identify
+ * @cmd: command used
+ *
+ * Called when we have issued a drive identify command to
+ * read and parse the results. This function is run with
+ * interrupts disabled.
+ */
+
+static inline void do_identify (ide_drive_t *drive, u8 cmd)
+{
+ ide_hwif_t *hwif = HWIF(drive);
+ int bswap = 1;
+ struct hd_driveid *id;
+
+ id = drive->id;
+ /* read 512 bytes of id info */
+ hwif->ata_input_data(drive, id, SECTOR_WORDS);
+
+ drive->id_read = 1;
+ local_irq_enable();
+ ide_fix_driveid(id);
+
+#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);
+ goto err_misc;
+ }
+#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 */
+ /* Vertos drives may still be weird */
+ bswap ^= 1;
+ }
+ 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"))
+ goto err_misc;
+
+ /* we depend on this a lot! */
+ id->model[sizeof(id->model)-1] = '\0';
+ printk("%s: %s, ", drive->name, id->model);
+ drive->present = 1;
+ drive->dead = 0;
+
+ /*
+ * Check for an ATAPI device
+ */
+ if (cmd == WIN_PIDENTIFY) {
+ u8 type = (id->config >> 8) & 0x1f;
+ printk("ATAPI ");
+ 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");
+ drive->removable = 1;
+ break;
+ }
+ }
+ /* Early cdrom models used zero */
+ type = ide_cdrom;
+ 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 ("CD/DVD-ROM");
+ 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;
+ /* an ATAPI device ignores DRDY */
+ drive->ready_stat = 0;
+ return;
+ }
+
+ /*
+ * Not an ATAPI device: looks like a "regular" hard disk
+ */
+ if (id->config & (1<<7))
+ drive->removable = 1;
+
+ if (drive_is_flashcard(drive))
+ drive->is_flash = 1;
+ drive->media = ide_disk;
+ printk("%s DISK drive\n", (drive->is_flash) ? "CFA" : "ATA" );
+ QUIRK_LIST(drive);
+ return;
+
+err_misc:
+ kfree(id);
+ drive->present = 0;
+ return;
+}
+
+/**
+ * actual_try_to_identify - send ata/atapi identify
+ * @drive: drive to identify
+ * @cmd: command to use
+ *
+ * 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 actual_try_to_identify (ide_drive_t *drive, u8 cmd)
+{
+ ide_hwif_t *hwif = HWIF(drive);
+ int rc;
+ unsigned long hd_status;
+ unsigned long timeout;
+ u8 s = 0, a = 0;
+
+ /* take a deep breath */
+ msleep(50);
+
+ if (IDE_CONTROL_REG) {
+ a = hwif->INB(IDE_ALTSTATUS_REG);
+ s = hwif->INB(IDE_STATUS_REG);
+ if ((a ^ s) & ~INDEX_STAT) {
+ printk(KERN_INFO "%s: probing with STATUS(0x%02x) instead of "
+ "ALTSTATUS(0x%02x)\n", drive->name, s, a);
+ /* ancient Seagate drives, broken interfaces */
+ hd_status = IDE_STATUS_REG;
+ } else {
+ /* use non-intrusive polling */
+ hd_status = IDE_ALTSTATUS_REG;
+ }
+ } else
+ hd_status = IDE_STATUS_REG;
+
+ /* set features register for atapi
+ * identify command to be sure of reply
+ */
+ if ((cmd == WIN_PIDENTIFY))
+ /* disable dma & overlap */
+ hwif->OUTB(0, IDE_FEATURE_REG);
+
+ /* ask drive for ID */
+ hwif->OUTB(cmd, IDE_COMMAND_REG);
+
+ timeout = ((cmd == WIN_IDENTIFY) ? WAIT_WORSTCASE : WAIT_PIDENTIFY) / 2;
+ timeout += jiffies;
+ do {
+ if (time_after(jiffies, timeout)) {
+ /* drive timed-out */
+ return 1;
+ }
+ /* give drive a breather */
+ msleep(50);
+ } while ((hwif->INB(hd_status)) & BUSY_STAT);
+
+ /* wait for IRQ and DRQ_STAT */
+ msleep(50);
+ if (OK_STAT((hwif->INB(IDE_STATUS_REG)), DRQ_STAT, BAD_R_STAT)) {
+ unsigned long flags;
+
+ /* local CPU only; some systems need this */
+ local_irq_save(flags);
+ /* drive returned ID */
+ do_identify(drive, cmd);
+ /* drive responded with ID */
+ rc = 0;
+ /* clear drive IRQ */
+ (void) hwif->INB(IDE_STATUS_REG);
+ local_irq_restore(flags);
+ } else {
+ /* drive refused ID */
+ rc = 2;
+ }
+ return rc;
+}
+
+/**
+ * try_to_identify - try to identify a drive
+ * @drive: drive to probe
+ * @cmd: command to use
+ *
+ * Issue the identify command and then do IRQ probing to
+ * complete the identification when needed by finding the
+ * IRQ the drive is attached to
+ */
+
+static int try_to_identify (ide_drive_t *drive, u8 cmd)
+{
+ ide_hwif_t *hwif = HWIF(drive);
+ int retval;
+ int autoprobe = 0;
+ unsigned long cookie = 0;
+
+ /*
+ * Disable device irq unless we need to
+ * probe for it. Otherwise we'll get spurious
+ * interrupts during the identify-phase that
+ * the irq handler isn't expecting.
+ */
+ if (IDE_CONTROL_REG) {
+ u8 ctl = drive->ctl | 2;
+ if (!hwif->irq) {
+ autoprobe = 1;
+ cookie = probe_irq_on();
+ /* enable device irq */
+ ctl &= ~2;
+ }
+ hwif->OUTB(ctl, IDE_CONTROL_REG);
+ }
+
+ retval = actual_try_to_identify(drive, cmd);
+
+ if (autoprobe) {
+ int irq;
+ /* mask device irq */
+ hwif->OUTB(drive->ctl|2, IDE_CONTROL_REG);
+ /* clear drive IRQ */
+ (void) hwif->INB(IDE_STATUS_REG);
+ udelay(5);
+ irq = probe_irq_off(cookie);
+ if (!hwif->irq) {
+ if (irq > 0) {
+ hwif->irq = irq;
+ } else {
+ /* Mmmm.. multiple IRQs..
+ * don't know which was ours
+ */
+ printk("%s: IRQ probe failed (0x%lx)\n",
+ drive->name, cookie);
+ }
+ }
+ }
+ return retval;
+}
+
+
+/**
+ * do_probe - probe an IDE device
+ * @drive: drive to probe
+ * @cmd: command to use
+ *
+ * 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, u8 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
+
+ /* needed for some systems
+ * (e.g. crw9624 as drive0 with disk as slave)
+ */
+ msleep(50);
+ SELECT_DRIVE(drive);
+ msleep(50);
+ if (hwif->INB(IDE_SELECT_REG) != drive->select.all && !drive->present) {
+ if (drive->select.b.unit != 0) {
+ /* exit with drive0 selected */
+ SELECT_DRIVE(&hwif->drives[0]);
+ /* allow BUSY_STAT to assert & clear */
+ msleep(50);
+ }
+ /* no i/f present: mmm.. this should be a 4 -ml */
+ return 3;
+ }
+
+ if (OK_STAT((hwif->INB(IDE_STATUS_REG)), READY_STAT, BUSY_STAT) ||
+ drive->present || cmd == WIN_PIDENTIFY) {
+ /* send cmd and wait */
+ if ((rc = try_to_identify(drive, cmd))) {
+ /* failed: try again */
+ rc = try_to_identify(drive,cmd);
+ }
+ if (hwif->INB(IDE_STATUS_REG) == (BUSY_STAT|READY_STAT))
+ return 4;
+
+ if ((rc == 1 && cmd == WIN_PIDENTIFY) &&
+ ((drive->autotune == IDE_TUNE_DEFAULT) ||
+ (drive->autotune == IDE_TUNE_AUTO))) {
+ unsigned long timeout;
+ printk("%s: no response (status = 0x%02x), "
+ "resetting drive\n", drive->name,
+ hwif->INB(IDE_STATUS_REG));
+ msleep(50);
+ hwif->OUTB(drive->select.all, IDE_SELECT_REG);
+ msleep(50);
+ hwif->OUTB(WIN_SRST, IDE_COMMAND_REG);
+ timeout = jiffies;
+ while (((hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) &&
+ time_before(jiffies, timeout + WAIT_WORSTCASE))
+ msleep(50);
+ rc = try_to_identify(drive, cmd);
+ }
+ if (rc == 1)
+ printk("%s: no response (status = 0x%02x)\n",
+ drive->name, hwif->INB(IDE_STATUS_REG));
+ /* ensure drive irq is clear */
+ (void) hwif->INB(IDE_STATUS_REG);
+ } else {
+ /* not present or maybe ATAPI */
+ rc = 3;
+ }
+ if (drive->select.b.unit != 0) {
+ /* exit with drive0 selected */
+ SELECT_DRIVE(&hwif->drives[0]);
+ msleep(50);
+ /* ensure drive irq is clear */
+ (void) hwif->INB(IDE_STATUS_REG);
+ }
+ return rc;
+}
+
+/*
+ *
+ */
+static void enable_nest (ide_drive_t *drive)
+{
+ ide_hwif_t *hwif = HWIF(drive);
+ unsigned long timeout;
+
+ printk("%s: enabling %s -- ", hwif->name, drive->id->model);
+ SELECT_DRIVE(drive);
+ msleep(50);
+ hwif->OUTB(EXABYTE_ENABLE_NEST, IDE_COMMAND_REG);
+ timeout = jiffies + WAIT_WORSTCASE;
+ do {
+ if (time_after(jiffies, timeout)) {
+ printk("failed (timeout)\n");
+ return;
+ }
+ msleep(50);
+ } while ((hwif->INB(IDE_STATUS_REG)) & BUSY_STAT);
+
+ msleep(50);
+
+ if (!OK_STAT((hwif->INB(IDE_STATUS_REG)), 0, BAD_STAT)) {
+ printk("failed (status = 0x%02x)\n", hwif->INB(IDE_STATUS_REG));
+ } else {
+ printk("success\n");
+ }
+
+ /* if !(success||timed-out) */
+ if (do_probe(drive, WIN_IDENTIFY) >= 2) {
+ /* look for ATAPI device */
+ (void) do_probe(drive, WIN_PIDENTIFY);
+ }
+}
+
+/**
+ * probe_for_drives - upper level drive probe
+ * @drive: drive to probe for
+ *
+ * probe_for_drive() tests for existence of a given drive using do_probe()
+ * and presents things to the user as needed.
+ *
+ * Returns: 0 no device was found
+ * 1 device was found (note: drive->present might
+ * still be 0)
+ */
+
+static inline u8 probe_for_drive (ide_drive_t *drive)
+{
+ /*
+ * In order to keep things simple we have an id
+ * block for all drives at all times. If the device
+ * is pre ATA or refuses ATA/ATAPI identify we
+ * will add faked data to this.
+ *
+ * Also note that 0 everywhere means "can't do X"
+ */
+
+ drive->id = kmalloc(SECTOR_WORDS *4, GFP_KERNEL);
+ drive->id_read = 0;
+ if(drive->id == NULL)
+ {
+ printk(KERN_ERR "ide: out of memory for id data.\n");
+ return 0;
+ }
+ memset(drive->id, 0, SECTOR_WORDS * 4);
+ strcpy(drive->id->model, "UNKNOWN");
+
+ /* skip probing? */
+ if (!drive->noprobe)
+ {
+ /* if !(success||timed-out) */
+ if (do_probe(drive, WIN_IDENTIFY) >= 2) {
+ /* look for ATAPI device */
+ (void) do_probe(drive, WIN_PIDENTIFY);
+ }
+ if (strstr(drive->id->model, "E X A B Y T E N E S T"))
+ enable_nest(drive);
+ if (!drive->present)
+ /* drive not found */
+ return 0;
+
+ /* identification failed? */
+ if (!drive->id_read) {
+ if (drive->media == ide_disk) {
+ printk(KERN_INFO "%s: non-IDE drive, CHS=%d/%d/%d\n",
+ drive->name, drive->cyl,
+ drive->head, drive->sect);
+ } else if (drive->media == ide_cdrom) {
+ printk(KERN_INFO "%s: ATAPI cdrom (?)\n", drive->name);
+ } else {
+ /* nuke it */
+ printk(KERN_WARNING "%s: Unknown device on bus refused identification. Ignoring.\n", drive->name);
+ drive->present = 0;
+ }
+ }
+ /* drive was found */
+ }
+ if(!drive->present)
+ return 0;
+ /* The drive wasn't being helpful. Add generic info only */
+ if (drive->id_read == 0) {
+ generic_id(drive);
+ return 1;
+ }
+
+ if (drive->media == ide_disk) {
+ ide_disk_init_chs(drive);
+ ide_disk_init_mult_count(drive);
+ }
+
+ return drive->present;
+}
+
+static void hwif_release_dev (struct device *dev)
+{
+ ide_hwif_t *hwif = container_of(dev, ide_hwif_t, gendev);
+
+ up(&hwif->gendev_rel_sem);
+}
+
+static void hwif_register (ide_hwif_t *hwif)
+{
+ /* register with global device tree */
+ strlcpy(hwif->gendev.bus_id,hwif->name,BUS_ID_SIZE);
+ hwif->gendev.driver_data = hwif;
+ if (hwif->gendev.parent == NULL) {
+ if (hwif->pci_dev)
+ hwif->gendev.parent = &hwif->pci_dev->dev;
+ else
+ /* Would like to do = &device_legacy */
+ hwif->gendev.parent = NULL;
+ }
+ hwif->gendev.release = hwif_release_dev;
+ device_register(&hwif->gendev);
+}
+
+static int wait_hwif_ready(ide_hwif_t *hwif)
+{
+ int rc;
+
+ printk(KERN_DEBUG "Probing IDE interface %s...\n", hwif->name);
+
+ /* Let HW settle down a bit from whatever init state we
+ * come from */
+ mdelay(2);
+
+ /* Wait for BSY bit to go away, spec timeout is 30 seconds,
+ * I know of at least one disk who takes 31 seconds, I use 35
+ * here to be safe
+ */
+ rc = ide_wait_not_busy(hwif, 35000);
+ if (rc)
+ return rc;
+
+ /* Now make sure both master & slave are ready */
+ SELECT_DRIVE(&hwif->drives[0]);
+ hwif->OUTB(8, hwif->io_ports[IDE_CONTROL_OFFSET]);
+ mdelay(2);
+ rc = ide_wait_not_busy(hwif, 10000);
+ if (rc)
+ return rc;
+ SELECT_DRIVE(&hwif->drives[1]);
+ hwif->OUTB(8, hwif->io_ports[IDE_CONTROL_OFFSET]);
+ mdelay(2);
+ rc = ide_wait_not_busy(hwif, 10000);
+
+ /* Exit function with master reselected (let's be sane) */
+ SELECT_DRIVE(&hwif->drives[0]);
+
+ return rc;
+}
+
+/**
+ * ide_undecoded_slave - look for bad CF adapters
+ * @hwif: interface
+ *
+ * Analyse the drives on the interface and attempt to decide if we
+ * have the same drive viewed twice. This occurs with crap CF adapters
+ * and PCMCIA sometimes.
+ */
+
+void ide_undecoded_slave(ide_hwif_t *hwif)
+{
+ ide_drive_t *drive0 = &hwif->drives[0];
+ ide_drive_t *drive1 = &hwif->drives[1];
+
+ if (drive0->present == 0 || drive1->present == 0)
+ return;
+
+ /* If the models don't match they are not the same product */
+ if (strcmp(drive0->id->model, drive1->id->model))
+ return;
+
+ /* Serial numbers do not match */
+ if (strncmp(drive0->id->serial_no, drive1->id->serial_no, 20))
+ return;
+
+ /* No serial number, thankfully very rare for CF */
+ if (drive0->id->serial_no[0] == 0)
+ return;
+
+ /* Appears to be an IDE flash adapter with decode bugs */
+ printk(KERN_WARNING "ide-probe: ignoring undecoded slave\n");
+
+ drive1->present = 0;
+}
+
+EXPORT_SYMBOL_GPL(ide_undecoded_slave);
+
+/*
+ * 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;
+ unsigned int irqd;
+
+ if (hwif->noprobe)
+ return;
+
+ if ((hwif->chipset != ide_4drives || !hwif->mate || !hwif->mate->present) &&
+ (ide_hwif_request_regions(hwif))) {
+ u16 msgout = 0;
+ for (unit = 0; unit < MAX_DRIVES; ++unit) {
+ ide_drive_t *drive = &hwif->drives[unit];
+ if (drive->present) {
+ drive->present = 0;
+ printk(KERN_ERR "%s: ERROR, PORTS ALREADY IN USE\n",
+ drive->name);
+ msgout = 1;
+ }
+ }
+ if (!msgout)
+ printk(KERN_ERR "%s: ports already in use, skipping probe\n",
+ hwif->name);
+ return;
+ }
+
+ /*
+ * We must always disable IRQ, as probe_for_drive will assert IRQ, but
+ * we'll install our IRQ driver much later...
+ */
+ irqd = hwif->irq;
+ if (irqd)
+ disable_irq(hwif->irq);
+
+ local_irq_set(flags);
+
+ /* This is needed on some PPCs and a bunch of BIOS-less embedded
+ * platforms. Typical cases are:
+ *
+ * - The firmware hard reset the disk before booting the kernel,
+ * the drive is still doing it's poweron-reset sequence, that
+ * can take up to 30 seconds
+ * - The firmware does nothing (or no firmware), the device is
+ * still in POST state (same as above actually).
+ * - Some CD/DVD/Writer combo drives tend to drive the bus during
+ * their reset sequence even when they are non-selected slave
+ * devices, thus preventing discovery of the main HD
+ *
+ * Doing this wait-for-busy should not harm any existing configuration
+ * (at least things won't be worse than what current code does, that
+ * is blindly go & talk to the drive) and fix some issues like the
+ * above.
+ *
+ * BenH.
+ */
+ if (wait_hwif_ready(hwif) == -EBUSY)
+ printk(KERN_DEBUG "%s: Wait for ready failed before probe !\n", hwif->name);
+
+ /*
+ * 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];
+ drive->dn = (hwif->channel ? 2 : 0) + unit;
+ (void) probe_for_drive(drive);
+ if (drive->present && !hwif->present) {
+ hwif->present = 1;
+ if (hwif->chipset != ide_4drives ||
+ !hwif->mate ||
+ !hwif->mate->present) {
+ hwif_register(hwif);
+ }
+ }
+ }
+ if (hwif->io_ports[IDE_CONTROL_OFFSET] && hwif->reset) {
+ unsigned long timeout = jiffies + WAIT_WORSTCASE;
+ u8 stat;
+
+ printk(KERN_WARNING "%s: reset\n", hwif->name);
+ hwif->OUTB(12, hwif->io_ports[IDE_CONTROL_OFFSET]);
+ udelay(10);
+ hwif->OUTB(8, hwif->io_ports[IDE_CONTROL_OFFSET]);
+ do {
+ msleep(50);
+ stat = hwif->INB(hwif->io_ports[IDE_STATUS_OFFSET]);
+ } while ((stat & BUSY_STAT) && time_after(timeout, jiffies));
+
+ }
+ local_irq_restore(flags);
+ /*
+ * Use cached IRQ number. It might be (and is...) changed by probe
+ * code above
+ */
+ if (irqd)
+ enable_irq(irqd);
+
+ if (!hwif->present) {
+ ide_hwif_release_regions(hwif);
+ return;
+ }
+
+ for (unit = 0; unit < MAX_DRIVES; ++unit) {
+ ide_drive_t *drive = &hwif->drives[unit];
+
+ if (drive->present) {
+ if (hwif->tuneproc != NULL &&
+ drive->autotune == IDE_TUNE_AUTO)
+ /* auto-tune PIO mode */
+ hwif->tuneproc(drive, 255);
+
+ if (drive->autotune != IDE_TUNE_DEFAULT &&
+ drive->autotune != IDE_TUNE_AUTO)
+ continue;
+
+ drive->nice1 = 1;
+
+ /*
+ * MAJOR HACK BARF :-/
+ *
+ * FIXME: chipsets own this cruft!
+ */
+ /*
+ * Move here to prevent module loading clashing.
+ */
+ // drive->autodma = hwif->autodma;
+ if (hwif->ide_dma_check) {
+ /*
+ * Force DMAing for the beginning of the check.
+ * Some chipsets appear to do interesting
+ * things, if not checked and cleared.
+ * PARANOIA!!!
+ */
+ hwif->ide_dma_off_quietly(drive);
+#ifdef CONFIG_IDEDMA_ONLYDISK
+ if (drive->media == ide_disk)
+#endif
+ hwif->ide_dma_check(drive);
+ }
+ }
+ }
+}
+
+static int hwif_init(ide_hwif_t *hwif);
+
+int probe_hwif_init_with_fixup(ide_hwif_t *hwif, void (*fixup)(ide_hwif_t *hwif))
+{
+ probe_hwif(hwif);
+
+ if (fixup)
+ fixup(hwif);
+
+ if (!hwif_init(hwif)) {
+ printk(KERN_INFO "%s: failed to initialize IDE interface\n",
+ hwif->name);
+ return -1;
+ }
+
+ if (hwif->present) {
+ u16 unit = 0;
+ for (unit = 0; unit < MAX_DRIVES; ++unit) {
+ ide_drive_t *drive = &hwif->drives[unit];
+ /* For now don't attach absent drives, we may
+ want them on default or a new "empty" class
+ for hotplug reprobing ? */
+ if (drive->present) {
+ ata_attach(drive);
+ }
+ }
+ }
+ return 0;
+}
+
+int probe_hwif_init(ide_hwif_t *hwif)
+{
+ return probe_hwif_init_with_fixup(hwif, NULL);
+}
+
+EXPORT_SYMBOL(probe_hwif_init);
+
+#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 */
+
+/*
+ * init request queue
+ */
+static int ide_init_queue(ide_drive_t *drive)
+{
+ request_queue_t *q;
+ ide_hwif_t *hwif = HWIF(drive);
+ int max_sectors = 256;
+ int max_sg_entries = PRD_ENTRIES;
+
+ /*
+ * Our default set up assumes the normal IDE case,
+ * that is 64K segmenting, standard PRD setup
+ * and LBA28. Some drivers then impose their own
+ * limits and LBA48 we could raise it but as yet
+ * do not.
+ */
+
+ q = blk_init_queue(do_ide_request, &ide_lock);
+ if (!q)
+ return 1;
+
+ q->queuedata = drive;
+ blk_queue_segment_boundary(q, 0xffff);
+
+ if (!hwif->rqsize) {
+ if (hwif->no_lba48 || hwif->no_lba48_dma)
+ hwif->rqsize = 256;
+ else
+ hwif->rqsize = 65536;
+ }
+ if (hwif->rqsize < max_sectors)
+ max_sectors = hwif->rqsize;
+ blk_queue_max_sectors(q, max_sectors);
+
+#ifdef CONFIG_PCI
+ /* When we have an IOMMU, we may have a problem where pci_map_sg()
+ * creates segments that don't completely match our boundary
+ * requirements and thus need to be broken up again. Because it
+ * doesn't align properly either, we may actually have to break up
+ * to more segments than what was we got in the first place, a max
+ * worst case is twice as many.
+ * This will be fixed once we teach pci_map_sg() about our boundary
+ * requirements, hopefully soon. *FIXME*
+ */
+ if (!PCI_DMA_BUS_IS_PHYS)
+ max_sg_entries >>= 1;
+#endif /* CONFIG_PCI */
+
+ blk_queue_max_hw_segments(q, max_sg_entries);
+ blk_queue_max_phys_segments(q, max_sg_entries);
+
+ /* assign drive queue */
+ drive->queue = q;
+
+ /* needs drive->queue to be set */
+ ide_toggle_bounce(drive, 1);
+
+ /* enable led activity for disk drives only */
+ if (drive->media == ide_disk && hwif->led_act)
+ blk_queue_activity_fn(q, hwif->led_act, drive);
+
+ return 0;
+}
+
+/*
+ * 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 int index;
+ ide_hwgroup_t *hwgroup;
+ ide_hwif_t *match = NULL;
+
+
+ BUG_ON(in_interrupt());
+ BUG_ON(irqs_disabled());
+ down(&ide_cfg_sem);
+ 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;
+ hwif->hwgroup = hwgroup;
+ /*
+ * Link us into the hwgroup.
+ * This must be done early, do ensure that unexpected_intr
+ * can find the hwif and prevent irq storms.
+ * No drives are attached to the new hwif, choose_drive
+ * can't do anything stupid (yet).
+ * Add ourself as the 2nd entry to the hwgroup->hwif
+ * linked list, the first entry is the hwif that owns
+ * hwgroup->handler - do not change that.
+ */
+ spin_lock_irq(&ide_lock);
+ hwif->next = hwgroup->hwif->next;
+ hwgroup->hwif->next = hwif;
+ spin_unlock_irq(&ide_lock);
+ } else {
+ hwgroup = kmalloc(sizeof(ide_hwgroup_t),GFP_KERNEL);
+ if (!hwgroup)
+ goto out_up;
+
+ hwif->hwgroup = hwgroup;
+
+ 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) {
+ int sa = SA_INTERRUPT;
+#if defined(__mc68000__) || defined(CONFIG_APUS)
+ sa = SA_SHIRQ;
+#endif /* __mc68000__ || CONFIG_APUS */
+
+ if (IDE_CHIPSET_IS_PCI(hwif->chipset)) {
+ sa = SA_SHIRQ;
+#ifndef CONFIG_IDEPCI_SHARE_IRQ
+ sa |= SA_INTERRUPT;
+#endif /* CONFIG_IDEPCI_SHARE_IRQ */
+ }
+
+ if (hwif->io_ports[IDE_CONTROL_OFFSET])
+ /* clear nIEN */
+ hwif->OUTB(0x08, hwif->io_ports[IDE_CONTROL_OFFSET]);
+
+ if (request_irq(hwif->irq,&ide_intr,sa,hwif->name,hwgroup))
+ goto out_unlink;
+ }
+
+ /*
+ * For any present drive:
+ * - allocate the block device queue
+ * - link drive into the hwgroup
+ */
+ for (index = 0; index < MAX_DRIVES; ++index) {
+ ide_drive_t *drive = &hwif->drives[index];
+ if (!drive->present)
+ continue;
+ if (ide_init_queue(drive)) {
+ printk(KERN_ERR "ide: failed to init %s\n",drive->name);
+ continue;
+ }
+ spin_lock_irq(&ide_lock);
+ if (!hwgroup->drive) {
+ /* first drive for hwgroup. */
+ drive->next = drive;
+ hwgroup->drive = drive;
+ hwgroup->hwif = HWIF(hwgroup->drive);
+ } else {
+ drive->next = hwgroup->drive->next;
+ hwgroup->drive->next = drive;
+ }
+ spin_unlock_irq(&ide_lock);
+ }
+
+#if !defined(__mc68000__) && !defined(CONFIG_APUS) && !defined(__sparc__)
+ printk("%s at 0x%03lx-0x%03lx,0x%03lx 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 0x%08lx on irq %d", 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");
+ up(&ide_cfg_sem);
+ return 0;
+out_unlink:
+ spin_lock_irq(&ide_lock);
+ if (hwif->next == hwif) {
+ BUG_ON(match);
+ BUG_ON(hwgroup->hwif != hwif);
+ kfree(hwgroup);
+ } else {
+ ide_hwif_t *g;
+ g = hwgroup->hwif;
+ while (g->next != hwif)
+ g = g->next;
+ g->next = hwif->next;
+ if (hwgroup->hwif == hwif) {
+ /* Impossible. */
+ printk(KERN_ERR "Duh. Uninitialized hwif listed as active hwif.\n");
+ hwgroup->hwif = g;
+ }
+ BUG_ON(hwgroup->hwif == hwif);
+ }
+ spin_unlock_irq(&ide_lock);
+out_up:
+ up(&ide_cfg_sem);
+ return 1;
+}
+
+static int ata_lock(dev_t dev, void *data)
+{
+ /* FIXME: we want to pin hwif down */
+ return 0;
+}
+
+static struct kobject *ata_probe(dev_t dev, int *part, void *data)
+{
+ ide_hwif_t *hwif = data;
+ int unit = *part >> PARTN_BITS;
+ ide_drive_t *drive = &hwif->drives[unit];
+ if (!drive->present)
+ return NULL;
+
+ if (drive->media == ide_disk)
+ request_module("ide-disk");
+ if (drive->scsi)
+ request_module("ide-scsi");
+ if (drive->media == ide_cdrom || drive->media == ide_optical)
+ request_module("ide-cd");
+ if (drive->media == ide_tape)
+ request_module("ide-tape");
+ if (drive->media == ide_floppy)
+ request_module("ide-floppy");
+
+ return NULL;
+}
+
+static struct kobject *exact_match(dev_t dev, int *part, void *data)
+{
+ struct gendisk *p = data;
+ *part &= (1 << PARTN_BITS) - 1;
+ return &p->kobj;
+}
+
+static int exact_lock(dev_t dev, void *data)
+{
+ struct gendisk *p = data;
+
+ if (!get_disk(p))
+ return -1;
+ return 0;
+}
+
+void ide_register_region(struct gendisk *disk)
+{
+ blk_register_region(MKDEV(disk->major, disk->first_minor),
+ disk->minors, NULL, exact_match, exact_lock, disk);
+}
+
+EXPORT_SYMBOL_GPL(ide_register_region);
+
+void ide_unregister_region(struct gendisk *disk)
+{
+ blk_unregister_region(MKDEV(disk->major, disk->first_minor),
+ disk->minors);
+}
+
+EXPORT_SYMBOL_GPL(ide_unregister_region);
+
+void ide_init_disk(struct gendisk *disk, ide_drive_t *drive)
+{
+ ide_hwif_t *hwif = drive->hwif;
+ unsigned int unit = (drive->select.all >> 4) & 1;
+
+ disk->major = hwif->major;
+ disk->first_minor = unit << PARTN_BITS;
+ sprintf(disk->disk_name, "hd%c", 'a' + hwif->index * MAX_DRIVES + unit);
+ disk->queue = drive->queue;
+}
+
+EXPORT_SYMBOL_GPL(ide_init_disk);
+
+static void drive_release_dev (struct device *dev)
+{
+ ide_drive_t *drive = container_of(dev, ide_drive_t, gendev);
+
+ up(&drive->gendev_rel_sem);
+}
+
+/*
+ * 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)
+{
+ unsigned int unit;
+
+ for (unit = 0; unit < MAX_DRIVES; ++unit) {
+ ide_drive_t * drive = &hwif->drives[unit];
+ ide_add_generic_settings(drive);
+ snprintf(drive->gendev.bus_id,BUS_ID_SIZE,"%u.%u",
+ hwif->index,unit);
+ drive->gendev.parent = &hwif->gendev;
+ drive->gendev.bus = &ide_bus_type;
+ drive->gendev.driver_data = drive;
+ drive->gendev.release = drive_release_dev;
+ if (drive->present) {
+ device_register(&drive->gendev);
+ sprintf(drive->devfs_name, "ide/host%d/bus%d/target%d/lun%d",
+ (hwif->channel && hwif->mate) ?
+ hwif->mate->index : hwif->index,
+ hwif->channel, unit, drive->lun);
+ }
+ }
+ blk_register_region(MKDEV(hwif->major, 0), MAX_DRIVES << PARTN_BITS,
+ THIS_MODULE, ata_probe, ata_lock, hwif);
+}
+
+static int hwif_init(ide_hwif_t *hwif)
+{
+ int old_irq;
+
+ /* Return success if no device is connected */
+ if (!hwif->present)
+ return 1;
+
+ 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 */
+
+ /* we set it back to 1 if all is ok below */
+ hwif->present = 0;
+
+ if (register_blkdev(hwif->major, hwif->name))
+ return 0;
+
+ if (!hwif->sg_max_nents)
+ hwif->sg_max_nents = PRD_ENTRIES;
+
+ hwif->sg_table = kmalloc(sizeof(struct scatterlist)*hwif->sg_max_nents,
+ GFP_KERNEL);
+ if (!hwif->sg_table) {
+ printk(KERN_ERR "%s: unable to allocate SG table.\n", hwif->name);
+ goto out;
+ }
+
+ if (init_irq(hwif) == 0)
+ goto done;
+
+ old_irq = 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, old_irq);
+ goto out;
+ }
+ if (init_irq(hwif)) {
+ printk("%s: probed IRQ %d and default IRQ %d failed.\n",
+ hwif->name, old_irq, hwif->irq);
+ goto out;
+ }
+ printk("%s: probed IRQ %d failed, using default.\n",
+ hwif->name, hwif->irq);
+
+done:
+ init_gendisk(hwif);
+ hwif->present = 1; /* success */
+ return 1;
+
+out:
+ unregister_blkdev(hwif->major, hwif->name);
+ return 0;
+}
+
+int ideprobe_init (void)
+{
+ unsigned int index;
+ int probe[MAX_HWIFS];
+
+ memset(probe, 0, MAX_HWIFS * sizeof(int));
+ for (index = 0; index < MAX_HWIFS; ++index)
+ probe[index] = !ide_hwifs[index].present;
+
+ 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]);
+ for (index = 0; index < MAX_HWIFS; ++index) {
+ if (probe[index]) {
+ ide_hwif_t *hwif = &ide_hwifs[index];
+ int unit;
+ if (!hwif->present)
+ continue;
+ if (hwif->chipset == ide_unknown || hwif->chipset == ide_forced)
+ hwif->chipset = ide_generic;
+ for (unit = 0; unit < MAX_DRIVES; ++unit)
+ if (hwif->drives[unit].present)
+ ata_attach(&hwif->drives[unit]);
+ }
+ }
+ return 0;
+}
+
+EXPORT_SYMBOL_GPL(ideprobe_init);