| /* |
| * 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. |
| * |
| * -- increase WAIT_PIDENTIFY to avoid CD-ROM locking at boot |
| * by Andrea Arcangeli |
| */ |
| |
| #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 <linux/scatterlist.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 : 0; |
| drive->special.b.set_multmode = drive->mult_req ? 1 : 0; |
| #else /* original, pre IDE-NFG, per request of AC */ |
| drive->mult_req = 0; |
| 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 |
| } |
| } |
| |
| /** |
| * 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_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 || 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); |
| |
| /* we depend on this a lot! */ |
| id->model[sizeof(id->model)-1] = '\0'; |
| |
| if (strstr(id->model, "E X A B Y T E N E S T")) |
| goto err_misc; |
| |
| 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 |
| */ |
| |
| /* |
| * 0x848a = CompactFlash device |
| * These are *not* removable in Linux definition of the term |
| */ |
| |
| if ((id->config != 0x848a) && (id->config & (1<<7))) |
| drive->removable = 1; |
| |
| drive->media = ide_disk; |
| printk("%s DISK drive\n", (id->config == 0x848a) ? "CFA" : "ATA" ); |
| |
| 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) { |
| if (!hwif->irq) { |
| autoprobe = 1; |
| cookie = probe_irq_on(); |
| } |
| ide_set_irq(drive, autoprobe); |
| } |
| |
| retval = actual_try_to_identify(drive, cmd); |
| |
| if (autoprobe) { |
| int irq; |
| |
| ide_set_irq(drive, 0); |
| /* 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 = kzalloc(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; |
| } |
| 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 (!drive->present) |
| /* drive not found */ |
| return 0; |
| if (strstr(drive->id->model, "E X A B Y T E N E S T")) |
| enable_nest(drive); |
| |
| /* 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); |
| |
| complete(&hwif->gendev_rel_comp); |
| } |
| |
| static void hwif_register (ide_hwif_t *hwif) |
| { |
| int ret; |
| |
| /* 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; |
| ret = device_register(&hwif->gendev); |
| if (ret < 0) |
| printk(KERN_WARNING "IDE: %s: device_register error: %d\n", |
| __FUNCTION__, ret); |
| } |
| |
| static int wait_hwif_ready(ide_hwif_t *hwif) |
| { |
| int unit, 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 */ |
| for (unit = 0; unit < MAX_DRIVES; unit++) { |
| ide_drive_t *drive = &hwif->drives[unit]; |
| |
| /* Ignore disks that we will not probe for later. */ |
| if (!drive->noprobe || drive->present) { |
| SELECT_DRIVE(drive); |
| ide_set_irq(drive, 1); |
| mdelay(2); |
| rc = ide_wait_not_busy(hwif, 35000); |
| if (rc) |
| goto out; |
| } else |
| printk(KERN_DEBUG "%s: ide_wait_not_busy() skipped\n", |
| drive->name); |
| } |
| out: |
| /* Exit function with master reselected (let's be sane) */ |
| if (unit) |
| SELECT_DRIVE(&hwif->drives[0]); |
| |
| return rc; |
| } |
| |
| /** |
| * ide_undecoded_slave - look for bad CF adapters |
| * @drive1: drive |
| * |
| * 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_drive_t *drive1) |
| { |
| ide_drive_t *drive0 = &drive1->hwif->drives[0]; |
| |
| if ((drive1->dn & 1) == 0 || drive0->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 long flags; |
| unsigned int irqd; |
| int unit; |
| |
| 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); |
| |
| /* |
| * Need to probe slave device first to make it release PDIAG-. |
| */ |
| for (unit = MAX_DRIVES - 1; unit >= 0; 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 && hwif->quirkproc) |
| hwif->quirkproc(drive); |
| } |
| |
| for (unit = 0; unit < MAX_DRIVES; ++unit) { |
| ide_drive_t *drive = &hwif->drives[unit]; |
| |
| if (drive->present) { |
| if (drive->autotune == IDE_TUNE_AUTO) |
| ide_set_max_pio(drive); |
| |
| if (drive->autotune != IDE_TUNE_DEFAULT && |
| drive->autotune != IDE_TUNE_AUTO) |
| continue; |
| |
| drive->nice1 = 1; |
| |
| if (hwif->dma_host_set) |
| ide_set_dma(drive); |
| } |
| } |
| |
| for (unit = 0; unit < MAX_DRIVES; ++unit) { |
| ide_drive_t *drive = &hwif->drives[unit]; |
| |
| if (hwif->no_io_32bit) |
| drive->no_io_32bit = 1; |
| else |
| drive->no_io_32bit = drive->id->dword_io ? 1 : 0; |
| } |
| } |
| |
| #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) |
| { |
| struct request_queue *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_node(do_ide_request, &ide_lock, hwif_to_node(hwif)); |
| if (!q) |
| return 1; |
| |
| q->queuedata = drive; |
| blk_queue_segment_boundary(q, 0xffff); |
| |
| if (!hwif->rqsize) { |
| if ((hwif->host_flags & IDE_HFLAG_NO_LBA48) || |
| (hwif->host_flags & IDE_HFLAG_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); |
| |
| 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. |
| */ |
| 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()); |
| BUG_ON(hwif == NULL); |
| |
| mutex_lock(&ide_cfg_mtx); |
| 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_node(sizeof(ide_hwgroup_t), |
| GFP_KERNEL | __GFP_ZERO, |
| hwif_to_node(hwif->drives[0].hwif)); |
| if (!hwgroup) |
| goto out_up; |
| |
| hwif->hwgroup = hwgroup; |
| |
| 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 = 0; |
| #if defined(__mc68000__) || defined(CONFIG_APUS) |
| sa = IRQF_SHARED; |
| #endif /* __mc68000__ || CONFIG_APUS */ |
| |
| if (IDE_CHIPSET_IS_PCI(hwif->chipset)) |
| sa = IRQF_SHARED; |
| |
| 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) |
| 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); |
| #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"); |
| mutex_unlock(&ide_cfg_mtx); |
| 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: |
| mutex_unlock(&ide_cfg_mtx); |
| 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->dev.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 ide_remove_drive_from_hwgroup(ide_drive_t *drive) |
| { |
| ide_hwgroup_t *hwgroup = drive->hwif->hwgroup; |
| |
| if (drive == drive->next) { |
| /* special case: last drive from hwgroup. */ |
| BUG_ON(hwgroup->drive != drive); |
| hwgroup->drive = NULL; |
| } else { |
| ide_drive_t *walk; |
| |
| walk = hwgroup->drive; |
| while (walk->next != drive) |
| walk = walk->next; |
| walk->next = drive->next; |
| if (hwgroup->drive == drive) { |
| hwgroup->drive = drive->next; |
| hwgroup->hwif = hwgroup->drive->hwif; |
| } |
| } |
| BUG_ON(hwgroup->drive == drive); |
| } |
| |
| static void drive_release_dev (struct device *dev) |
| { |
| ide_drive_t *drive = container_of(dev, ide_drive_t, gendev); |
| |
| spin_lock_irq(&ide_lock); |
| ide_remove_drive_from_hwgroup(drive); |
| kfree(drive->id); |
| drive->id = NULL; |
| drive->present = 0; |
| /* Messed up locking ... */ |
| spin_unlock_irq(&ide_lock); |
| blk_cleanup_queue(drive->queue); |
| spin_lock_irq(&ide_lock); |
| drive->queue = NULL; |
| spin_unlock_irq(&ide_lock); |
| |
| complete(&drive->gendev_rel_comp); |
| } |
| |
| /* |
| * 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; |
| } |
| 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; |
| } |
| |
| sg_init_table(hwif->sg_table, hwif->sg_max_nents); |
| |
| 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); |
| |
| ide_acpi_init(hwif); |
| |
| hwif->present = 1; /* success */ |
| return 1; |
| |
| out: |
| unregister_blkdev(hwif->major, hwif->name); |
| return 0; |
| } |
| |
| static void hwif_register_devices(ide_hwif_t *hwif) |
| { |
| unsigned int i; |
| |
| for (i = 0; i < MAX_DRIVES; i++) { |
| ide_drive_t *drive = &hwif->drives[i]; |
| |
| if (drive->present) { |
| int ret = device_register(&drive->gendev); |
| |
| if (ret < 0) |
| printk(KERN_WARNING "IDE: %s: " |
| "device_register error: %d\n", |
| __FUNCTION__, ret); |
| } |
| } |
| } |
| |
| int ide_device_add_all(u8 *idx) |
| { |
| ide_hwif_t *hwif; |
| int i, rc = 0; |
| |
| for (i = 0; i < MAX_HWIFS; i++) { |
| if (idx[i] == 0xff) |
| continue; |
| |
| probe_hwif(&ide_hwifs[idx[i]]); |
| } |
| |
| for (i = 0; i < MAX_HWIFS; i++) { |
| if (idx[i] == 0xff) |
| continue; |
| |
| hwif = &ide_hwifs[idx[i]]; |
| |
| if (hwif_init(hwif) == 0) { |
| printk(KERN_INFO "%s: failed to initialize IDE " |
| "interface\n", hwif->name); |
| rc = -1; |
| continue; |
| } |
| } |
| |
| for (i = 0; i < MAX_HWIFS; i++) { |
| if (idx[i] == 0xff) |
| continue; |
| |
| hwif = &ide_hwifs[idx[i]]; |
| |
| if (hwif->present) { |
| if (hwif->chipset == ide_unknown || |
| hwif->chipset == ide_forced) |
| hwif->chipset = ide_generic; |
| hwif_register_devices(hwif); |
| } |
| } |
| |
| for (i = 0; i < MAX_HWIFS; i++) { |
| if (idx[i] != 0xff) |
| ide_proc_register_port(&ide_hwifs[idx[i]]); |
| } |
| |
| return rc; |
| } |
| EXPORT_SYMBOL_GPL(ide_device_add_all); |
| |
| int ide_device_add(u8 idx[4]) |
| { |
| u8 idx_all[MAX_HWIFS]; |
| int i; |
| |
| for (i = 0; i < MAX_HWIFS; i++) |
| idx_all[i] = (i < 4) ? idx[i] : 0xff; |
| |
| return ide_device_add_all(idx_all); |
| } |
| EXPORT_SYMBOL_GPL(ide_device_add); |