| /* |
| * Copyright (C) 1994-1998 Linus Torvalds & authors (see below) |
| * Copyright (C) 2005, 2007 Bartlomiej Zolnierkiewicz |
| */ |
| |
| /* |
| * 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) |
| { |
| u16 *id = drive->id; |
| |
| id[ATA_ID_CUR_CYLS] = id[ATA_ID_CYLS] = drive->cyl; |
| id[ATA_ID_CUR_HEADS] = id[ATA_ID_HEADS] = drive->head; |
| id[ATA_ID_CUR_SECTORS] = id[ATA_ID_SECTORS] = drive->sect; |
| } |
| |
| static void ide_disk_init_chs(ide_drive_t *drive) |
| { |
| u16 *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[ATA_ID_CYLS]; |
| drive->head = drive->bios_head = id[ATA_ID_HEADS]; |
| drive->sect = drive->bios_sect = id[ATA_ID_SECTORS]; |
| } |
| |
| /* Handle logical geometry translation by the drive */ |
| if (ata_id_current_chs_valid(id)) { |
| drive->cyl = id[ATA_ID_CUR_CYLS]; |
| drive->head = id[ATA_ID_CUR_HEADS]; |
| drive->sect = id[ATA_ID_CUR_SECTORS]; |
| } |
| |
| /* Use physical geometry if what we have still makes no sense */ |
| if (drive->head > 16 && id[ATA_ID_HEADS] && id[ATA_ID_HEADS] <= 16) { |
| drive->cyl = id[ATA_ID_CYLS]; |
| drive->head = id[ATA_ID_HEADS]; |
| drive->sect = id[ATA_ID_SECTORS]; |
| } |
| } |
| |
| static void ide_disk_init_mult_count(ide_drive_t *drive) |
| { |
| u16 *id = drive->id; |
| u8 max_multsect = id[ATA_ID_MAX_MULTSECT] & 0xff; |
| |
| if (max_multsect) { |
| if ((max_multsect / 2) > 1) |
| id[ATA_ID_MULTSECT] = max_multsect | 0x100; |
| else |
| id[ATA_ID_MULTSECT] &= ~0x1ff; |
| |
| drive->mult_req = id[ATA_ID_MULTSECT] & 0xff; |
| |
| if (drive->mult_req) |
| drive->special.b.set_multmode = 1; |
| } |
| } |
| |
| static void ide_classify_ata_dev(ide_drive_t *drive) |
| { |
| u16 *id = drive->id; |
| char *m = (char *)&id[ATA_ID_PROD]; |
| int is_cfa = ata_id_is_cfa(id); |
| |
| /* CF devices are *not* removable in Linux definition of the term */ |
| if (is_cfa == 0 && (id[ATA_ID_CONFIG] & (1 << 7))) |
| drive->dev_flags |= IDE_DFLAG_REMOVABLE; |
| |
| drive->media = ide_disk; |
| |
| if (!ata_id_has_unload(drive->id)) |
| drive->dev_flags |= IDE_DFLAG_NO_UNLOAD; |
| |
| printk(KERN_INFO "%s: %s, %s DISK drive\n", drive->name, m, |
| is_cfa ? "CFA" : "ATA"); |
| } |
| |
| static void ide_classify_atapi_dev(ide_drive_t *drive) |
| { |
| u16 *id = drive->id; |
| char *m = (char *)&id[ATA_ID_PROD]; |
| u8 type = (id[ATA_ID_CONFIG] >> 8) & 0x1f; |
| |
| printk(KERN_INFO "%s: %s, ATAPI ", drive->name, m); |
| switch (type) { |
| case ide_floppy: |
| if (!strstr(m, "CD-ROM")) { |
| if (!strstr(m, "oppy") && |
| !strstr(m, "poyp") && |
| !strstr(m, "ZIP")) |
| printk(KERN_CONT "cdrom or floppy?, assuming "); |
| if (drive->media != ide_cdrom) { |
| printk(KERN_CONT "FLOPPY"); |
| drive->dev_flags |= IDE_DFLAG_REMOVABLE; |
| break; |
| } |
| } |
| /* Early cdrom models used zero */ |
| type = ide_cdrom; |
| case ide_cdrom: |
| drive->dev_flags |= IDE_DFLAG_REMOVABLE; |
| #ifdef CONFIG_PPC |
| /* kludge for Apple PowerBook internal zip */ |
| if (!strstr(m, "CD-ROM") && strstr(m, "ZIP")) { |
| printk(KERN_CONT "FLOPPY"); |
| type = ide_floppy; |
| break; |
| } |
| #endif |
| printk(KERN_CONT "CD/DVD-ROM"); |
| break; |
| case ide_tape: |
| printk(KERN_CONT "TAPE"); |
| break; |
| case ide_optical: |
| printk(KERN_CONT "OPTICAL"); |
| drive->dev_flags |= IDE_DFLAG_REMOVABLE; |
| break; |
| default: |
| printk(KERN_CONT "UNKNOWN (type %d)", type); |
| break; |
| } |
| |
| printk(KERN_CONT " drive\n"); |
| drive->media = type; |
| /* an ATAPI device ignores DRDY */ |
| drive->ready_stat = 0; |
| if (ata_id_cdb_intr(id)) |
| drive->atapi_flags |= IDE_AFLAG_DRQ_INTERRUPT; |
| drive->dev_flags |= IDE_DFLAG_DOORLOCKING; |
| /* we don't do head unloading on ATAPI devices */ |
| drive->dev_flags |= IDE_DFLAG_NO_UNLOAD; |
| } |
| |
| /** |
| * 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 void do_identify(ide_drive_t *drive, u8 cmd) |
| { |
| ide_hwif_t *hwif = drive->hwif; |
| u16 *id = drive->id; |
| char *m = (char *)&id[ATA_ID_PROD]; |
| unsigned long flags; |
| int bswap = 1; |
| |
| /* local CPU only; some systems need this */ |
| local_irq_save(flags); |
| /* read 512 bytes of id info */ |
| hwif->tp_ops->input_data(drive, NULL, id, SECTOR_SIZE); |
| local_irq_restore(flags); |
| |
| drive->dev_flags |= IDE_DFLAG_ID_READ; |
| #ifdef DEBUG |
| printk(KERN_INFO "%s: dumping identify data\n", drive->name); |
| ide_dump_identify((u8 *)id); |
| #endif |
| ide_fix_driveid(id); |
| |
| /* |
| * ATA_CMD_ID_ATA returns little-endian info, |
| * ATA_CMD_ID_ATAPI *usually* returns little-endian info. |
| */ |
| if (cmd == ATA_CMD_ID_ATAPI) { |
| if ((m[0] == 'N' && m[1] == 'E') || /* NEC */ |
| (m[0] == 'F' && m[1] == 'X') || /* Mitsumi */ |
| (m[0] == 'P' && m[1] == 'i')) /* Pioneer */ |
| /* Vertos drives may still be weird */ |
| bswap ^= 1; |
| } |
| |
| ide_fixstring(m, ATA_ID_PROD_LEN, bswap); |
| ide_fixstring((char *)&id[ATA_ID_FW_REV], ATA_ID_FW_REV_LEN, bswap); |
| ide_fixstring((char *)&id[ATA_ID_SERNO], ATA_ID_SERNO_LEN, bswap); |
| |
| /* we depend on this a lot! */ |
| m[ATA_ID_PROD_LEN - 1] = '\0'; |
| |
| if (strstr(m, "E X A B Y T E N E S T")) |
| goto err_misc; |
| |
| drive->dev_flags |= IDE_DFLAG_PRESENT; |
| drive->dev_flags &= ~IDE_DFLAG_DEAD; |
| |
| /* |
| * Check for an ATAPI device |
| */ |
| if (cmd == ATA_CMD_ID_ATAPI) |
| ide_classify_atapi_dev(drive); |
| else |
| /* |
| * Not an ATAPI device: looks like a "regular" hard disk |
| */ |
| ide_classify_ata_dev(drive); |
| return; |
| err_misc: |
| kfree(id); |
| drive->dev_flags &= ~IDE_DFLAG_PRESENT; |
| } |
| |
| /** |
| * 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 = drive->hwif; |
| struct ide_io_ports *io_ports = &hwif->io_ports; |
| const struct ide_tp_ops *tp_ops = hwif->tp_ops; |
| int use_altstatus = 0, rc; |
| unsigned long timeout; |
| u8 s = 0, a = 0; |
| |
| /* take a deep breath */ |
| msleep(50); |
| |
| if (io_ports->ctl_addr && |
| (hwif->host_flags & IDE_HFLAG_BROKEN_ALTSTATUS) == 0) { |
| a = tp_ops->read_altstatus(hwif); |
| s = tp_ops->read_status(hwif); |
| if ((a ^ s) & ~ATA_IDX) |
| /* ancient Seagate drives, broken interfaces */ |
| printk(KERN_INFO "%s: probing with STATUS(0x%02x) " |
| "instead of ALTSTATUS(0x%02x)\n", |
| drive->name, s, a); |
| else |
| /* use non-intrusive polling */ |
| use_altstatus = 1; |
| } |
| |
| /* set features register for atapi |
| * identify command to be sure of reply |
| */ |
| if (cmd == ATA_CMD_ID_ATAPI) { |
| ide_task_t task; |
| |
| memset(&task, 0, sizeof(task)); |
| /* disable DMA & overlap */ |
| task.tf_flags = IDE_TFLAG_OUT_FEATURE; |
| |
| tp_ops->tf_load(drive, &task); |
| } |
| |
| /* ask drive for ID */ |
| tp_ops->exec_command(hwif, cmd); |
| |
| timeout = ((cmd == ATA_CMD_ID_ATA) ? WAIT_WORSTCASE : WAIT_PIDENTIFY) / 2; |
| |
| if (ide_busy_sleep(hwif, timeout, use_altstatus)) |
| return 1; |
| |
| /* wait for IRQ and ATA_DRQ */ |
| msleep(50); |
| s = tp_ops->read_status(hwif); |
| |
| if (OK_STAT(s, ATA_DRQ, BAD_R_STAT)) { |
| /* drive returned ID */ |
| do_identify(drive, cmd); |
| /* drive responded with ID */ |
| rc = 0; |
| /* clear drive IRQ */ |
| (void)tp_ops->read_status(hwif); |
| } 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 = drive->hwif; |
| const struct ide_tp_ops *tp_ops = hwif->tp_ops; |
| 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 (hwif->io_ports.ctl_addr) { |
| if (!hwif->irq) { |
| autoprobe = 1; |
| cookie = probe_irq_on(); |
| } |
| tp_ops->set_irq(hwif, autoprobe); |
| } |
| |
| retval = actual_try_to_identify(drive, cmd); |
| |
| if (autoprobe) { |
| int irq; |
| |
| tp_ops->set_irq(hwif, 0); |
| /* clear drive IRQ */ |
| (void)tp_ops->read_status(hwif); |
| 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(KERN_ERR "%s: IRQ probe failed (0x%lx)\n", |
| drive->name, cookie); |
| } |
| } |
| } |
| return retval; |
| } |
| |
| int ide_busy_sleep(ide_hwif_t *hwif, unsigned long timeout, int altstatus) |
| { |
| u8 stat; |
| |
| timeout += jiffies; |
| |
| do { |
| msleep(50); /* give drive a breather */ |
| stat = altstatus ? hwif->tp_ops->read_altstatus(hwif) |
| : hwif->tp_ops->read_status(hwif); |
| if ((stat & ATA_BUSY) == 0) |
| return 0; |
| } while (time_before(jiffies, timeout)); |
| |
| return 1; /* drive timed-out */ |
| } |
| |
| static u8 ide_read_device(ide_drive_t *drive) |
| { |
| ide_task_t task; |
| |
| memset(&task, 0, sizeof(task)); |
| task.tf_flags = IDE_TFLAG_IN_DEVICE; |
| |
| drive->hwif->tp_ops->tf_read(drive, &task); |
| |
| return task.tf.device; |
| } |
| |
| /** |
| * 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) |
| { |
| ide_hwif_t *hwif = drive->hwif; |
| const struct ide_tp_ops *tp_ops = hwif->tp_ops; |
| int rc; |
| u8 present = !!(drive->dev_flags & IDE_DFLAG_PRESENT), stat; |
| |
| /* avoid waiting for inappropriate probes */ |
| if (present && drive->media != ide_disk && cmd == ATA_CMD_ID_ATA) |
| return 4; |
| |
| #ifdef DEBUG |
| printk(KERN_INFO "probing for %s: present=%d, media=%d, probetype=%s\n", |
| drive->name, present, drive->media, |
| (cmd == ATA_CMD_ID_ATA) ? "ATA" : "ATAPI"); |
| #endif |
| |
| /* needed for some systems |
| * (e.g. crw9624 as drive0 with disk as slave) |
| */ |
| msleep(50); |
| SELECT_DRIVE(drive); |
| msleep(50); |
| |
| if (ide_read_device(drive) != drive->select && present == 0) { |
| if (drive->dn & 1) { |
| /* exit with drive0 selected */ |
| SELECT_DRIVE(hwif->devices[0]); |
| /* allow ATA_BUSY to assert & clear */ |
| msleep(50); |
| } |
| /* no i/f present: mmm.. this should be a 4 -ml */ |
| return 3; |
| } |
| |
| stat = tp_ops->read_status(hwif); |
| |
| if (OK_STAT(stat, ATA_DRDY, ATA_BUSY) || |
| present || cmd == ATA_CMD_ID_ATAPI) { |
| /* send cmd and wait */ |
| if ((rc = try_to_identify(drive, cmd))) { |
| /* failed: try again */ |
| rc = try_to_identify(drive,cmd); |
| } |
| |
| stat = tp_ops->read_status(hwif); |
| |
| if (stat == (ATA_BUSY | ATA_DRDY)) |
| return 4; |
| |
| if (rc == 1 && cmd == ATA_CMD_ID_ATAPI) { |
| printk(KERN_ERR "%s: no response (status = 0x%02x), " |
| "resetting drive\n", drive->name, stat); |
| msleep(50); |
| SELECT_DRIVE(drive); |
| msleep(50); |
| tp_ops->exec_command(hwif, ATA_CMD_DEV_RESET); |
| (void)ide_busy_sleep(hwif, WAIT_WORSTCASE, 0); |
| rc = try_to_identify(drive, cmd); |
| } |
| |
| /* ensure drive IRQ is clear */ |
| stat = tp_ops->read_status(hwif); |
| |
| if (rc == 1) |
| printk(KERN_ERR "%s: no response (status = 0x%02x)\n", |
| drive->name, stat); |
| } else { |
| /* not present or maybe ATAPI */ |
| rc = 3; |
| } |
| if (drive->dn & 1) { |
| /* exit with drive0 selected */ |
| SELECT_DRIVE(hwif->devices[0]); |
| msleep(50); |
| /* ensure drive irq is clear */ |
| (void)tp_ops->read_status(hwif); |
| } |
| return rc; |
| } |
| |
| /* |
| * |
| */ |
| static void enable_nest (ide_drive_t *drive) |
| { |
| ide_hwif_t *hwif = drive->hwif; |
| const struct ide_tp_ops *tp_ops = hwif->tp_ops; |
| u8 stat; |
| |
| printk(KERN_INFO "%s: enabling %s -- ", |
| hwif->name, (char *)&drive->id[ATA_ID_PROD]); |
| |
| SELECT_DRIVE(drive); |
| msleep(50); |
| tp_ops->exec_command(hwif, ATA_EXABYTE_ENABLE_NEST); |
| |
| if (ide_busy_sleep(hwif, WAIT_WORSTCASE, 0)) { |
| printk(KERN_CONT "failed (timeout)\n"); |
| return; |
| } |
| |
| msleep(50); |
| |
| stat = tp_ops->read_status(hwif); |
| |
| if (!OK_STAT(stat, 0, BAD_STAT)) |
| printk(KERN_CONT "failed (status = 0x%02x)\n", stat); |
| else |
| printk(KERN_CONT "success\n"); |
| } |
| |
| /** |
| * 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: IDE_DFLAG_PRESENT might still be not set) |
| */ |
| |
| static u8 probe_for_drive(ide_drive_t *drive) |
| { |
| char *m; |
| |
| /* |
| * 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->dev_flags &= ~IDE_DFLAG_ID_READ; |
| |
| drive->id = kzalloc(SECTOR_SIZE, GFP_KERNEL); |
| if (drive->id == NULL) { |
| printk(KERN_ERR "ide: out of memory for id data.\n"); |
| return 0; |
| } |
| |
| m = (char *)&drive->id[ATA_ID_PROD]; |
| strcpy(m, "UNKNOWN"); |
| |
| /* skip probing? */ |
| if ((drive->dev_flags & IDE_DFLAG_NOPROBE) == 0) { |
| retry: |
| /* if !(success||timed-out) */ |
| if (do_probe(drive, ATA_CMD_ID_ATA) >= 2) |
| /* look for ATAPI device */ |
| (void)do_probe(drive, ATA_CMD_ID_ATAPI); |
| |
| if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0) |
| /* drive not found */ |
| return 0; |
| |
| if (strstr(m, "E X A B Y T E N E S T")) { |
| enable_nest(drive); |
| goto retry; |
| } |
| |
| /* identification failed? */ |
| if ((drive->dev_flags & IDE_DFLAG_ID_READ) == 0) { |
| 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->dev_flags &= ~IDE_DFLAG_PRESENT; |
| } |
| } |
| /* drive was found */ |
| } |
| |
| if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0) |
| return 0; |
| |
| /* The drive wasn't being helpful. Add generic info only */ |
| if ((drive->dev_flags & IDE_DFLAG_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->dev_flags & IDE_DFLAG_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 int ide_register_port(ide_hwif_t *hwif) |
| { |
| int ret; |
| |
| /* register with global device tree */ |
| dev_set_name(&hwif->gendev, hwif->name); |
| hwif->gendev.driver_data = hwif; |
| hwif->gendev.parent = hwif->dev; |
| hwif->gendev.release = hwif_release_dev; |
| |
| ret = device_register(&hwif->gendev); |
| if (ret < 0) { |
| printk(KERN_WARNING "IDE: %s: device_register error: %d\n", |
| __func__, ret); |
| goto out; |
| } |
| |
| hwif->portdev = device_create(ide_port_class, &hwif->gendev, |
| MKDEV(0, 0), hwif, hwif->name); |
| if (IS_ERR(hwif->portdev)) { |
| ret = PTR_ERR(hwif->portdev); |
| device_unregister(&hwif->gendev); |
| } |
| out: |
| return ret; |
| } |
| |
| /** |
| * ide_port_wait_ready - wait for port to become ready |
| * @hwif: IDE port |
| * |
| * 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-non-busy should not harm any existing |
| * configuration and fix some issues like the above. |
| * |
| * BenH. |
| * |
| * Returns 0 on success, error code (< 0) otherwise. |
| */ |
| |
| static int ide_port_wait_ready(ide_hwif_t *hwif) |
| { |
| ide_drive_t *drive; |
| int i, 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 */ |
| ide_port_for_each_dev(i, drive, hwif) { |
| /* Ignore disks that we will not probe for later. */ |
| if ((drive->dev_flags & IDE_DFLAG_NOPROBE) == 0 || |
| (drive->dev_flags & IDE_DFLAG_PRESENT)) { |
| SELECT_DRIVE(drive); |
| hwif->tp_ops->set_irq(hwif, 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 (i) |
| SELECT_DRIVE(hwif->devices[0]); |
| |
| return rc; |
| } |
| |
| /** |
| * ide_undecoded_slave - look for bad CF adapters |
| * @dev1: slave device |
| * |
| * 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 *dev1) |
| { |
| ide_drive_t *dev0 = dev1->hwif->devices[0]; |
| |
| if ((dev1->dn & 1) == 0 || (dev0->dev_flags & IDE_DFLAG_PRESENT) == 0) |
| return; |
| |
| /* If the models don't match they are not the same product */ |
| if (strcmp((char *)&dev0->id[ATA_ID_PROD], |
| (char *)&dev1->id[ATA_ID_PROD])) |
| return; |
| |
| /* Serial numbers do not match */ |
| if (strncmp((char *)&dev0->id[ATA_ID_SERNO], |
| (char *)&dev1->id[ATA_ID_SERNO], ATA_ID_SERNO_LEN)) |
| return; |
| |
| /* No serial number, thankfully very rare for CF */ |
| if (*(char *)&dev0->id[ATA_ID_SERNO] == 0) |
| return; |
| |
| /* Appears to be an IDE flash adapter with decode bugs */ |
| printk(KERN_WARNING "ide-probe: ignoring undecoded slave\n"); |
| |
| dev1->dev_flags &= ~IDE_DFLAG_PRESENT; |
| } |
| |
| EXPORT_SYMBOL_GPL(ide_undecoded_slave); |
| |
| static int ide_probe_port(ide_hwif_t *hwif) |
| { |
| ide_drive_t *drive; |
| unsigned long flags; |
| unsigned int irqd; |
| int i, rc = -ENODEV; |
| |
| BUG_ON(hwif->present); |
| |
| if ((hwif->devices[0]->dev_flags & IDE_DFLAG_NOPROBE) && |
| (hwif->devices[1]->dev_flags & IDE_DFLAG_NOPROBE)) |
| return -EACCES; |
| |
| /* |
| * 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_save(flags); |
| local_irq_enable_in_hardirq(); |
| |
| if (ide_port_wait_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. |
| */ |
| ide_port_for_each_dev(i, drive, hwif) { |
| (void) probe_for_drive(drive); |
| if (drive->dev_flags & IDE_DFLAG_PRESENT) |
| rc = 0; |
| } |
| |
| local_irq_restore(flags); |
| |
| /* |
| * Use cached IRQ number. It might be (and is...) changed by probe |
| * code above |
| */ |
| if (irqd) |
| enable_irq(irqd); |
| |
| return rc; |
| } |
| |
| static void ide_port_tune_devices(ide_hwif_t *hwif) |
| { |
| const struct ide_port_ops *port_ops = hwif->port_ops; |
| ide_drive_t *drive; |
| int i; |
| |
| ide_port_for_each_dev(i, drive, hwif) { |
| if (drive->dev_flags & IDE_DFLAG_PRESENT) { |
| if (port_ops && port_ops->quirkproc) |
| port_ops->quirkproc(drive); |
| } |
| } |
| |
| ide_port_for_each_dev(i, drive, hwif) { |
| if (drive->dev_flags & IDE_DFLAG_PRESENT) { |
| ide_set_max_pio(drive); |
| |
| drive->dev_flags |= IDE_DFLAG_NICE1; |
| |
| if (hwif->dma_ops) |
| ide_set_dma(drive); |
| } |
| } |
| |
| ide_port_for_each_dev(i, drive, hwif) { |
| if (hwif->host_flags & IDE_HFLAG_NO_IO_32BIT) |
| drive->dev_flags |= IDE_DFLAG_NO_IO_32BIT; |
| else |
| drive->dev_flags &= ~IDE_DFLAG_NO_IO_32BIT; |
| } |
| } |
| |
| /* |
| * init request queue |
| */ |
| static int ide_init_queue(ide_drive_t *drive) |
| { |
| struct request_queue *q; |
| ide_hwif_t *hwif = drive->hwif; |
| 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, NULL, hwif_to_node(hwif)); |
| if (!q) |
| return 1; |
| |
| q->queuedata = drive; |
| blk_queue_segment_boundary(q, 0xffff); |
| |
| 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; |
| } |
| |
| static DEFINE_MUTEX(ide_cfg_mtx); |
| |
| /* |
| * For any present drive: |
| * - allocate the block device queue |
| */ |
| static int ide_port_setup_devices(ide_hwif_t *hwif) |
| { |
| ide_drive_t *drive; |
| int i, j = 0; |
| |
| mutex_lock(&ide_cfg_mtx); |
| ide_port_for_each_dev(i, drive, hwif) { |
| if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0) |
| continue; |
| |
| if (ide_init_queue(drive)) { |
| printk(KERN_ERR "ide: failed to init %s\n", |
| drive->name); |
| kfree(drive->id); |
| drive->id = NULL; |
| drive->dev_flags &= ~IDE_DFLAG_PRESENT; |
| continue; |
| } |
| |
| j++; |
| } |
| mutex_unlock(&ide_cfg_mtx); |
| |
| return j; |
| } |
| |
| /* |
| * This routine sets up the IRQ for an IDE interface. |
| */ |
| static int init_irq (ide_hwif_t *hwif) |
| { |
| struct ide_io_ports *io_ports = &hwif->io_ports; |
| int sa = 0; |
| |
| mutex_lock(&ide_cfg_mtx); |
| spin_lock_init(&hwif->lock); |
| |
| init_timer(&hwif->timer); |
| hwif->timer.function = &ide_timer_expiry; |
| hwif->timer.data = (unsigned long)hwif; |
| |
| #if defined(__mc68000__) |
| sa = IRQF_SHARED; |
| #endif /* __mc68000__ */ |
| |
| if (hwif->chipset == ide_pci) |
| sa = IRQF_SHARED; |
| |
| if (io_ports->ctl_addr) |
| hwif->tp_ops->set_irq(hwif, 1); |
| |
| if (request_irq(hwif->irq, &ide_intr, sa, hwif->name, hwif)) |
| goto out_up; |
| |
| 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 !defined(__mc68000__) |
| printk(KERN_INFO "%s at 0x%03lx-0x%03lx,0x%03lx on irq %d", hwif->name, |
| io_ports->data_addr, io_ports->status_addr, |
| io_ports->ctl_addr, hwif->irq); |
| #else |
| printk(KERN_INFO "%s at 0x%08lx on irq %d", hwif->name, |
| io_ports->data_addr, hwif->irq); |
| #endif /* __mc68000__ */ |
| if (hwif->host->host_flags & IDE_HFLAG_SERIALIZE) |
| printk(KERN_CONT " (serialized)"); |
| printk(KERN_CONT "\n"); |
| |
| mutex_unlock(&ide_cfg_mtx); |
| return 0; |
| 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->devices[unit]; |
| |
| if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0) |
| return NULL; |
| |
| if (drive->media == ide_disk) |
| request_module("ide-disk"); |
| 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 &disk_to_dev(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->dn & 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); |
| ide_hwif_t *hwif = drive->hwif; |
| |
| ide_proc_unregister_device(drive); |
| |
| spin_lock_irq(&hwif->lock); |
| kfree(drive->id); |
| drive->id = NULL; |
| drive->dev_flags &= ~IDE_DFLAG_PRESENT; |
| /* Messed up locking ... */ |
| spin_unlock_irq(&hwif->lock); |
| blk_cleanup_queue(drive->queue); |
| spin_lock_irq(&hwif->lock); |
| drive->queue = NULL; |
| spin_unlock_irq(&hwif->lock); |
| |
| complete(&drive->gendev_rel_comp); |
| } |
| |
| static int hwif_init(ide_hwif_t *hwif) |
| { |
| int old_irq; |
| |
| if (!hwif->irq) { |
| hwif->irq = __ide_default_irq(hwif->io_ports.data_addr); |
| if (!hwif->irq) { |
| printk(KERN_ERR "%s: disabled, no IRQ\n", hwif->name); |
| return 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. |
| */ |
| hwif->irq = __ide_default_irq(hwif->io_ports.data_addr); |
| if (!hwif->irq) { |
| printk(KERN_ERR "%s: disabled, unable to get IRQ %d\n", |
| hwif->name, old_irq); |
| goto out; |
| } |
| if (init_irq(hwif)) { |
| printk(KERN_ERR "%s: probed IRQ %d and default IRQ %d failed\n", |
| hwif->name, old_irq, hwif->irq); |
| goto out; |
| } |
| printk(KERN_WARNING "%s: probed IRQ %d failed, using default\n", |
| hwif->name, hwif->irq); |
| |
| done: |
| blk_register_region(MKDEV(hwif->major, 0), MAX_DRIVES << PARTN_BITS, |
| THIS_MODULE, ata_probe, ata_lock, hwif); |
| return 1; |
| |
| out: |
| unregister_blkdev(hwif->major, hwif->name); |
| return 0; |
| } |
| |
| static void hwif_register_devices(ide_hwif_t *hwif) |
| { |
| ide_drive_t *drive; |
| unsigned int i; |
| |
| ide_port_for_each_dev(i, drive, hwif) { |
| struct device *dev = &drive->gendev; |
| int ret; |
| |
| if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0) |
| continue; |
| |
| dev_set_name(dev, "%u.%u", hwif->index, i); |
| dev->parent = &hwif->gendev; |
| dev->bus = &ide_bus_type; |
| dev->driver_data = drive; |
| dev->release = drive_release_dev; |
| |
| ret = device_register(dev); |
| if (ret < 0) |
| printk(KERN_WARNING "IDE: %s: device_register error: " |
| "%d\n", __func__, ret); |
| } |
| } |
| |
| static void ide_port_init_devices(ide_hwif_t *hwif) |
| { |
| const struct ide_port_ops *port_ops = hwif->port_ops; |
| ide_drive_t *drive; |
| int i; |
| |
| ide_port_for_each_dev(i, drive, hwif) { |
| drive->dn = i + hwif->channel * 2; |
| |
| if (hwif->host_flags & IDE_HFLAG_IO_32BIT) |
| drive->io_32bit = 1; |
| if (hwif->host_flags & IDE_HFLAG_UNMASK_IRQS) |
| drive->dev_flags |= IDE_DFLAG_UNMASK; |
| if (hwif->host_flags & IDE_HFLAG_NO_UNMASK_IRQS) |
| drive->dev_flags |= IDE_DFLAG_NO_UNMASK; |
| |
| if (port_ops && port_ops->init_dev) |
| port_ops->init_dev(drive); |
| } |
| } |
| |
| static void ide_init_port(ide_hwif_t *hwif, unsigned int port, |
| const struct ide_port_info *d) |
| { |
| hwif->channel = port; |
| |
| if (d->chipset) |
| hwif->chipset = d->chipset; |
| |
| if (d->init_iops) |
| d->init_iops(hwif); |
| |
| if ((!hwif->irq && (d->host_flags & IDE_HFLAG_LEGACY_IRQS)) || |
| (d->host_flags & IDE_HFLAG_FORCE_LEGACY_IRQS)) |
| hwif->irq = port ? 15 : 14; |
| |
| /* ->host_flags may be set by ->init_iops (or even earlier...) */ |
| hwif->host_flags |= d->host_flags; |
| hwif->pio_mask = d->pio_mask; |
| |
| if (d->tp_ops) |
| hwif->tp_ops = d->tp_ops; |
| |
| /* ->set_pio_mode for DTC2278 is currently limited to port 0 */ |
| if (hwif->chipset != ide_dtc2278 || hwif->channel == 0) |
| hwif->port_ops = d->port_ops; |
| |
| hwif->swdma_mask = d->swdma_mask; |
| hwif->mwdma_mask = d->mwdma_mask; |
| hwif->ultra_mask = d->udma_mask; |
| |
| if ((d->host_flags & IDE_HFLAG_NO_DMA) == 0) { |
| int rc; |
| |
| if (d->init_dma) |
| rc = d->init_dma(hwif, d); |
| else |
| rc = ide_hwif_setup_dma(hwif, d); |
| |
| if (rc < 0) { |
| printk(KERN_INFO "%s: DMA disabled\n", hwif->name); |
| hwif->dma_base = 0; |
| hwif->swdma_mask = 0; |
| hwif->mwdma_mask = 0; |
| hwif->ultra_mask = 0; |
| } else if (d->dma_ops) |
| hwif->dma_ops = d->dma_ops; |
| } |
| |
| if ((d->host_flags & IDE_HFLAG_SERIALIZE) || |
| ((d->host_flags & IDE_HFLAG_SERIALIZE_DMA) && hwif->dma_base)) |
| hwif->host->host_flags |= IDE_HFLAG_SERIALIZE; |
| |
| if (d->max_sectors) |
| hwif->rqsize = d->max_sectors; |
| |
| /* call chipset specific routine for each enabled port */ |
| if (d->init_hwif) |
| d->init_hwif(hwif); |
| } |
| |
| static void ide_port_cable_detect(ide_hwif_t *hwif) |
| { |
| const struct ide_port_ops *port_ops = hwif->port_ops; |
| |
| if (port_ops && port_ops->cable_detect && (hwif->ultra_mask & 0x78)) { |
| if (hwif->cbl != ATA_CBL_PATA40_SHORT) |
| hwif->cbl = port_ops->cable_detect(hwif); |
| } |
| } |
| |
| static const u8 ide_hwif_to_major[] = |
| { IDE0_MAJOR, IDE1_MAJOR, IDE2_MAJOR, IDE3_MAJOR, IDE4_MAJOR, |
| IDE5_MAJOR, IDE6_MAJOR, IDE7_MAJOR, IDE8_MAJOR, IDE9_MAJOR }; |
| |
| static void ide_port_init_devices_data(ide_hwif_t *hwif) |
| { |
| ide_drive_t *drive; |
| int i; |
| |
| ide_port_for_each_dev(i, drive, hwif) { |
| u8 j = (hwif->index * MAX_DRIVES) + i; |
| |
| memset(drive, 0, sizeof(*drive)); |
| |
| drive->media = ide_disk; |
| drive->select = (i << 4) | ATA_DEVICE_OBS; |
| drive->hwif = hwif; |
| drive->ready_stat = ATA_DRDY; |
| drive->bad_wstat = BAD_W_STAT; |
| drive->special.b.recalibrate = 1; |
| drive->special.b.set_geometry = 1; |
| drive->name[0] = 'h'; |
| drive->name[1] = 'd'; |
| drive->name[2] = 'a' + j; |
| drive->max_failures = IDE_DEFAULT_MAX_FAILURES; |
| |
| INIT_LIST_HEAD(&drive->list); |
| init_completion(&drive->gendev_rel_comp); |
| } |
| } |
| |
| static void ide_init_port_data(ide_hwif_t *hwif, unsigned int index) |
| { |
| /* fill in any non-zero initial values */ |
| hwif->index = index; |
| hwif->major = ide_hwif_to_major[index]; |
| |
| hwif->name[0] = 'i'; |
| hwif->name[1] = 'd'; |
| hwif->name[2] = 'e'; |
| hwif->name[3] = '0' + index; |
| |
| init_completion(&hwif->gendev_rel_comp); |
| |
| hwif->tp_ops = &default_tp_ops; |
| |
| ide_port_init_devices_data(hwif); |
| } |
| |
| static void ide_init_port_hw(ide_hwif_t *hwif, hw_regs_t *hw) |
| { |
| memcpy(&hwif->io_ports, &hw->io_ports, sizeof(hwif->io_ports)); |
| hwif->irq = hw->irq; |
| hwif->chipset = hw->chipset; |
| hwif->dev = hw->dev; |
| hwif->gendev.parent = hw->parent ? hw->parent : hw->dev; |
| hwif->ack_intr = hw->ack_intr; |
| hwif->config_data = hw->config; |
| } |
| |
| static unsigned int ide_indexes; |
| |
| /** |
| * ide_find_port_slot - find free port slot |
| * @d: IDE port info |
| * |
| * Return the new port slot index or -ENOENT if we are out of free slots. |
| */ |
| |
| static int ide_find_port_slot(const struct ide_port_info *d) |
| { |
| int idx = -ENOENT; |
| u8 bootable = (d && (d->host_flags & IDE_HFLAG_NON_BOOTABLE)) ? 0 : 1; |
| u8 i = (d && (d->host_flags & IDE_HFLAG_QD_2ND_PORT)) ? 1 : 0;; |
| |
| /* |
| * Claim an unassigned slot. |
| * |
| * Give preference to claiming other slots before claiming ide0/ide1, |
| * just in case there's another interface yet-to-be-scanned |
| * which uses ports 0x1f0/0x170 (the ide0/ide1 defaults). |
| * |
| * Unless there is a bootable card that does not use the standard |
| * ports 0x1f0/0x170 (the ide0/ide1 defaults). |
| */ |
| mutex_lock(&ide_cfg_mtx); |
| if (bootable) { |
| if ((ide_indexes | i) != (1 << MAX_HWIFS) - 1) |
| idx = ffz(ide_indexes | i); |
| } else { |
| if ((ide_indexes | 3) != (1 << MAX_HWIFS) - 1) |
| idx = ffz(ide_indexes | 3); |
| else if ((ide_indexes & 3) != 3) |
| idx = ffz(ide_indexes); |
| } |
| if (idx >= 0) |
| ide_indexes |= (1 << idx); |
| mutex_unlock(&ide_cfg_mtx); |
| |
| return idx; |
| } |
| |
| static void ide_free_port_slot(int idx) |
| { |
| mutex_lock(&ide_cfg_mtx); |
| ide_indexes &= ~(1 << idx); |
| mutex_unlock(&ide_cfg_mtx); |
| } |
| |
| static void ide_port_free_devices(ide_hwif_t *hwif) |
| { |
| ide_drive_t *drive; |
| int i; |
| |
| ide_port_for_each_dev(i, drive, hwif) |
| kfree(drive); |
| } |
| |
| static int ide_port_alloc_devices(ide_hwif_t *hwif, int node) |
| { |
| int i; |
| |
| for (i = 0; i < MAX_DRIVES; i++) { |
| ide_drive_t *drive; |
| |
| drive = kzalloc_node(sizeof(*drive), GFP_KERNEL, node); |
| if (drive == NULL) |
| goto out_nomem; |
| |
| hwif->devices[i] = drive; |
| } |
| return 0; |
| |
| out_nomem: |
| ide_port_free_devices(hwif); |
| return -ENOMEM; |
| } |
| |
| struct ide_host *ide_host_alloc(const struct ide_port_info *d, hw_regs_t **hws) |
| { |
| struct ide_host *host; |
| struct device *dev = hws[0] ? hws[0]->dev : NULL; |
| int node = dev ? dev_to_node(dev) : -1; |
| int i; |
| |
| host = kzalloc_node(sizeof(*host), GFP_KERNEL, node); |
| if (host == NULL) |
| return NULL; |
| |
| for (i = 0; i < MAX_HOST_PORTS; i++) { |
| ide_hwif_t *hwif; |
| int idx; |
| |
| if (hws[i] == NULL) |
| continue; |
| |
| hwif = kzalloc_node(sizeof(*hwif), GFP_KERNEL, node); |
| if (hwif == NULL) |
| continue; |
| |
| if (ide_port_alloc_devices(hwif, node) < 0) { |
| kfree(hwif); |
| continue; |
| } |
| |
| idx = ide_find_port_slot(d); |
| if (idx < 0) { |
| printk(KERN_ERR "%s: no free slot for interface\n", |
| d ? d->name : "ide"); |
| kfree(hwif); |
| continue; |
| } |
| |
| ide_init_port_data(hwif, idx); |
| |
| hwif->host = host; |
| |
| host->ports[i] = hwif; |
| host->n_ports++; |
| } |
| |
| if (host->n_ports == 0) { |
| kfree(host); |
| return NULL; |
| } |
| |
| host->dev[0] = dev; |
| |
| if (d) { |
| host->init_chipset = d->init_chipset; |
| host->host_flags = d->host_flags; |
| } |
| |
| return host; |
| } |
| EXPORT_SYMBOL_GPL(ide_host_alloc); |
| |
| int ide_host_register(struct ide_host *host, const struct ide_port_info *d, |
| hw_regs_t **hws) |
| { |
| ide_hwif_t *hwif, *mate = NULL; |
| int i, j = 0; |
| |
| ide_host_for_each_port(i, hwif, host) { |
| if (hwif == NULL) { |
| mate = NULL; |
| continue; |
| } |
| |
| ide_init_port_hw(hwif, hws[i]); |
| ide_port_apply_params(hwif); |
| |
| if (d == NULL) { |
| mate = NULL; |
| } else { |
| if ((i & 1) && mate) { |
| hwif->mate = mate; |
| mate->mate = hwif; |
| } |
| |
| mate = (i & 1) ? NULL : hwif; |
| |
| ide_init_port(hwif, i & 1, d); |
| ide_port_cable_detect(hwif); |
| } |
| |
| ide_port_init_devices(hwif); |
| } |
| |
| ide_host_for_each_port(i, hwif, host) { |
| if (hwif == NULL) |
| continue; |
| |
| if (ide_probe_port(hwif) == 0) |
| hwif->present = 1; |
| |
| if (hwif->chipset != ide_4drives || !hwif->mate || |
| !hwif->mate->present) |
| ide_register_port(hwif); |
| |
| if (hwif->present) |
| ide_port_tune_devices(hwif); |
| } |
| |
| ide_host_for_each_port(i, hwif, host) { |
| if (hwif == NULL) |
| continue; |
| |
| if (hwif_init(hwif) == 0) { |
| printk(KERN_INFO "%s: failed to initialize IDE " |
| "interface\n", hwif->name); |
| hwif->present = 0; |
| continue; |
| } |
| |
| if (hwif->present) |
| if (ide_port_setup_devices(hwif) == 0) { |
| hwif->present = 0; |
| continue; |
| } |
| |
| j++; |
| |
| ide_acpi_init(hwif); |
| |
| if (hwif->present) |
| ide_acpi_port_init_devices(hwif); |
| } |
| |
| ide_host_for_each_port(i, hwif, host) { |
| if (hwif == NULL) |
| continue; |
| |
| if (hwif->present) |
| hwif_register_devices(hwif); |
| } |
| |
| ide_host_for_each_port(i, hwif, host) { |
| if (hwif == NULL) |
| continue; |
| |
| ide_sysfs_register_port(hwif); |
| ide_proc_register_port(hwif); |
| |
| if (hwif->present) |
| ide_proc_port_register_devices(hwif); |
| } |
| |
| return j ? 0 : -1; |
| } |
| EXPORT_SYMBOL_GPL(ide_host_register); |
| |
| int ide_host_add(const struct ide_port_info *d, hw_regs_t **hws, |
| struct ide_host **hostp) |
| { |
| struct ide_host *host; |
| int rc; |
| |
| host = ide_host_alloc(d, hws); |
| if (host == NULL) |
| return -ENOMEM; |
| |
| rc = ide_host_register(host, d, hws); |
| if (rc) { |
| ide_host_free(host); |
| return rc; |
| } |
| |
| if (hostp) |
| *hostp = host; |
| |
| return 0; |
| } |
| EXPORT_SYMBOL_GPL(ide_host_add); |
| |
| static void __ide_port_unregister_devices(ide_hwif_t *hwif) |
| { |
| ide_drive_t *drive; |
| int i; |
| |
| ide_port_for_each_dev(i, drive, hwif) { |
| if (drive->dev_flags & IDE_DFLAG_PRESENT) { |
| device_unregister(&drive->gendev); |
| wait_for_completion(&drive->gendev_rel_comp); |
| } |
| } |
| } |
| |
| void ide_port_unregister_devices(ide_hwif_t *hwif) |
| { |
| mutex_lock(&ide_cfg_mtx); |
| __ide_port_unregister_devices(hwif); |
| hwif->present = 0; |
| ide_port_init_devices_data(hwif); |
| mutex_unlock(&ide_cfg_mtx); |
| } |
| EXPORT_SYMBOL_GPL(ide_port_unregister_devices); |
| |
| /** |
| * ide_unregister - free an IDE interface |
| * @hwif: IDE interface |
| * |
| * Perform the final unregister of an IDE interface. |
| * |
| * Locking: |
| * The caller must not hold the IDE locks. |
| * |
| * It is up to the caller to be sure there is no pending I/O here, |
| * and that the interface will not be reopened (present/vanishing |
| * locking isn't yet done BTW). |
| */ |
| |
| static void ide_unregister(ide_hwif_t *hwif) |
| { |
| BUG_ON(in_interrupt()); |
| BUG_ON(irqs_disabled()); |
| |
| mutex_lock(&ide_cfg_mtx); |
| |
| if (hwif->present) { |
| __ide_port_unregister_devices(hwif); |
| hwif->present = 0; |
| } |
| |
| ide_proc_unregister_port(hwif); |
| |
| free_irq(hwif->irq, hwif); |
| |
| device_unregister(hwif->portdev); |
| device_unregister(&hwif->gendev); |
| wait_for_completion(&hwif->gendev_rel_comp); |
| |
| /* |
| * Remove us from the kernel's knowledge |
| */ |
| blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS); |
| kfree(hwif->sg_table); |
| unregister_blkdev(hwif->major, hwif->name); |
| |
| ide_release_dma_engine(hwif); |
| |
| mutex_unlock(&ide_cfg_mtx); |
| } |
| |
| void ide_host_free(struct ide_host *host) |
| { |
| ide_hwif_t *hwif; |
| int i; |
| |
| ide_host_for_each_port(i, hwif, host) { |
| if (hwif == NULL) |
| continue; |
| |
| ide_port_free_devices(hwif); |
| ide_free_port_slot(hwif->index); |
| kfree(hwif); |
| } |
| |
| kfree(host); |
| } |
| EXPORT_SYMBOL_GPL(ide_host_free); |
| |
| void ide_host_remove(struct ide_host *host) |
| { |
| ide_hwif_t *hwif; |
| int i; |
| |
| ide_host_for_each_port(i, hwif, host) { |
| if (hwif) |
| ide_unregister(hwif); |
| } |
| |
| ide_host_free(host); |
| } |
| EXPORT_SYMBOL_GPL(ide_host_remove); |
| |
| void ide_port_scan(ide_hwif_t *hwif) |
| { |
| ide_port_apply_params(hwif); |
| ide_port_cable_detect(hwif); |
| ide_port_init_devices(hwif); |
| |
| if (ide_probe_port(hwif) < 0) |
| return; |
| |
| hwif->present = 1; |
| |
| ide_port_tune_devices(hwif); |
| ide_acpi_port_init_devices(hwif); |
| ide_port_setup_devices(hwif); |
| hwif_register_devices(hwif); |
| ide_proc_port_register_devices(hwif); |
| } |
| EXPORT_SYMBOL_GPL(ide_port_scan); |