/* * linux/drivers/ide/ide-probe.c Version 1.06 June 9, 2000 * * Copyright (C) 1994-1998 Linus Torvalds & authors (see below) */ /* * Mostly written by Mark Lord * and Gadi Oxman * and Andre Hedrick * * 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. */ #undef REALLY_SLOW_IO /* most systems can safely undef this */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include static inline void do_identify (ide_drive_t *drive, byte cmd) { int bswap = 1; struct hd_driveid *id; id = drive->id = kmalloc (SECTOR_WORDS*4, GFP_ATOMIC); /* called with interrupts disabled! */ ide_input_data(drive, id, SECTOR_WORDS); /* read 512 bytes of id info */ ide__sti(); /* local CPU only */ ide_fix_driveid(id); if (id->word156 == 0x4d42) { printk("%s: drive->id->word156 == 0x%04x \n", drive->name, drive->id->word156); } if (!drive->forced_lun) drive->last_lun = id->last_lun & 0x7; #if defined (CONFIG_SCSI_EATA_DMA) || defined (CONFIG_SCSI_EATA_PIO) || defined (CONFIG_SCSI_EATA) /* * EATA SCSI controllers do a hardware ATA emulation: * Ignore them if there is a driver for them available. */ if ((id->model[0] == 'P' && id->model[1] == 'M') || (id->model[0] == 'S' && id->model[1] == 'K')) { printk("%s: EATA SCSI HBA %.10s\n", drive->name, id->model); drive->present = 0; return; } #endif /* CONFIG_SCSI_EATA_DMA || CONFIG_SCSI_EATA_PIO */ /* * WIN_IDENTIFY returns little-endian info, * WIN_PIDENTIFY *usually* returns little-endian info. */ if (cmd == WIN_PIDENTIFY) { if ((id->model[0] == 'N' && id->model[1] == 'E') /* NEC */ || (id->model[0] == 'F' && id->model[1] == 'X') /* Mitsumi */ || (id->model[0] == 'P' && id->model[1] == 'i'))/* Pioneer */ bswap ^= 1; /* Vertos drives may still be weird */ } ide_fixstring (id->model, sizeof(id->model), bswap); ide_fixstring (id->fw_rev, sizeof(id->fw_rev), bswap); ide_fixstring (id->serial_no, sizeof(id->serial_no), bswap); if (strstr(id->model, "E X A B Y T E N E S T")) return; id->model[sizeof(id->model)-1] = '\0'; /* we depend on this a lot! */ printk("%s: %s, ", drive->name, id->model); drive->present = 1; /* * Check for an ATAPI device */ if (cmd == WIN_PIDENTIFY) { byte type = (id->config >> 8) & 0x1f; printk("ATAPI "); #ifdef CONFIG_BLK_DEV_PDC4030 if (HWIF(drive)->channel == 1 && HWIF(drive)->chipset == ide_pdc4030) { printk(" -- not supported on 2nd Promise port\n"); drive->present = 0; return; } #endif /* CONFIG_BLK_DEV_PDC4030 */ switch (type) { case ide_floppy: if (!strstr(id->model, "CD-ROM")) { if (!strstr(id->model, "oppy") && !strstr(id->model, "poyp") && !strstr(id->model, "ZIP")) printk("cdrom or floppy?, assuming "); if (drive->media != ide_cdrom) { printk ("FLOPPY"); break; } } type = ide_cdrom; /* Early cdrom models used zero */ case ide_cdrom: drive->removable = 1; #ifdef CONFIG_PPC /* kludge for Apple PowerBook internal zip */ if (!strstr(id->model, "CD-ROM") && strstr(id->model, "ZIP")) { printk ("FLOPPY"); type = ide_floppy; break; } #endif printk ("CDROM"); break; case ide_tape: printk ("TAPE"); break; case ide_optical: printk ("OPTICAL"); drive->removable = 1; break; default: printk("UNKNOWN (type %d)", type); break; } printk (" drive\n"); drive->media = type; return; } /* * Not an ATAPI device: looks like a "regular" hard disk */ if (id->config & (1<<7)) drive->removable = 1; /* * Prevent long system lockup probing later for non-existant * slave drive if the hwif is actually a flash memory card of some variety: */ if (drive_is_flashcard(drive)) { ide_drive_t *mate = &HWIF(drive)->drives[1^drive->select.b.unit]; if (!mate->ata_flash) { mate->present = 0; mate->noprobe = 1; } } drive->media = ide_disk; printk("ATA DISK drive\n"); QUIRK_LIST(HWIF(drive),drive); return; } /* * try_to_identify() sends an ATA(PI) IDENTIFY request to a drive * and waits for a response. It also monitors irqs while this is * happening, in hope of automatically determining which one is * being used by the interface. * * Returns: 0 device was identified * 1 device timed-out (no response to identify request) * 2 device aborted the command (refused to identify itself) */ static int try_to_identify (ide_drive_t *drive, byte cmd) { int rc; ide_ioreg_t hd_status; unsigned long timeout; unsigned long irqs = 0; byte s, a; if (IDE_CONTROL_REG) { if (!HWIF(drive)->irq) { /* already got an IRQ? */ probe_irq_off(probe_irq_on()); /* clear dangling irqs */ irqs = probe_irq_on(); /* start monitoring irqs */ OUT_BYTE(drive->ctl,IDE_CONTROL_REG); /* enable device irq */ } ide_delay_50ms(); /* take a deep breath */ a = IN_BYTE(IDE_ALTSTATUS_REG); s = IN_BYTE(IDE_STATUS_REG); if ((a ^ s) & ~INDEX_STAT) { printk("%s: probing with STATUS(0x%02x) instead of ALTSTATUS(0x%02x)\n", drive->name, s, a); hd_status = IDE_STATUS_REG; /* ancient Seagate drives, broken interfaces */ } else { hd_status = IDE_ALTSTATUS_REG; /* use non-intrusive polling */ } } else { ide_delay_50ms(); hd_status = IDE_STATUS_REG; } /* set features register for atapi identify command to be sure of reply */ if ((cmd == WIN_PIDENTIFY)) OUT_BYTE(0,IDE_FEATURE_REG); /* disable dma & overlap */ #if CONFIG_BLK_DEV_PDC4030 if (HWIF(drive)->chipset == ide_pdc4030) { /* DC4030 hosted drives need their own identify... */ extern int pdc4030_identify(ide_drive_t *); if (pdc4030_identify(drive)) { if (irqs) (void) probe_irq_off(irqs); return 1; } } else #endif /* CONFIG_BLK_DEV_PDC4030 */ OUT_BYTE(cmd,IDE_COMMAND_REG); /* ask drive for ID */ timeout = ((cmd == WIN_IDENTIFY) ? WAIT_WORSTCASE : WAIT_PIDENTIFY) / 2; timeout += jiffies; do { if (0 < (signed long)(jiffies - timeout)) { if (irqs) (void) probe_irq_off(irqs); return 1; /* drive timed-out */ } ide_delay_50ms(); /* give drive a breather */ } while (IN_BYTE(hd_status) & BUSY_STAT); ide_delay_50ms(); /* wait for IRQ and DRQ_STAT */ if (OK_STAT(GET_STAT(),DRQ_STAT,BAD_R_STAT)) { unsigned long flags; __save_flags(flags); /* local CPU only */ __cli(); /* local CPU only; some systems need this */ do_identify(drive, cmd); /* drive returned ID */ rc = 0; /* drive responded with ID */ (void) GET_STAT(); /* clear drive IRQ */ __restore_flags(flags); /* local CPU only */ } else rc = 2; /* drive refused ID */ if (IDE_CONTROL_REG && !HWIF(drive)->irq) { irqs = probe_irq_off(irqs); /* get our irq number */ if (irqs > 0) { HWIF(drive)->irq = irqs; /* save it for later */ irqs = probe_irq_on(); OUT_BYTE(drive->ctl|2,IDE_CONTROL_REG); /* mask device irq */ udelay(5); (void) probe_irq_off(irqs); (void) probe_irq_off(probe_irq_on()); /* clear self-inflicted irq */ (void) GET_STAT(); /* clear drive IRQ */ } else { /* Mmmm.. multiple IRQs.. don't know which was ours */ printk("%s: IRQ probe failed (%ld)\n", drive->name, irqs); #ifdef CONFIG_BLK_DEV_CMD640 #ifdef CMD640_DUMP_REGS if (HWIF(drive)->chipset == ide_cmd640) { printk("%s: Hmmm.. probably a driver problem.\n", drive->name); CMD640_DUMP_REGS; } #endif /* CMD640_DUMP_REGS */ #endif /* CONFIG_BLK_DEV_CMD640 */ } } return rc; } /* * do_probe() has the difficult job of finding a drive if it exists, * without getting hung up if it doesn't exist, without trampling on * ethernet cards, and without leaving any IRQs dangling to haunt us later. * * If a drive is "known" to exist (from CMOS or kernel parameters), * but does not respond right away, the probe will "hang in there" * for the maximum wait time (about 30 seconds), otherwise it will * exit much more quickly. * * Returns: 0 device was identified * 1 device timed-out (no response to identify request) * 2 device aborted the command (refused to identify itself) * 3 bad status from device (possible for ATAPI drives) * 4 probe was not attempted because failure was obvious */ static int do_probe (ide_drive_t *drive, byte cmd) { int rc; ide_hwif_t *hwif = HWIF(drive); if (drive->present) { /* avoid waiting for inappropriate probes */ if ((drive->media != ide_disk) && (cmd == WIN_IDENTIFY)) return 4; } #ifdef DEBUG printk("probing for %s: present=%d, media=%d, probetype=%s\n", drive->name, drive->present, drive->media, (cmd == WIN_IDENTIFY) ? "ATA" : "ATAPI"); #endif ide_delay_50ms(); /* needed for some systems (e.g. crw9624 as drive0 with disk as slave) */ SELECT_DRIVE(hwif,drive); ide_delay_50ms(); if (IN_BYTE(IDE_SELECT_REG) != drive->select.all && !drive->present) { if (drive->select.b.unit != 0) { SELECT_DRIVE(hwif,&hwif->drives[0]); /* exit with drive0 selected */ ide_delay_50ms(); /* allow BUSY_STAT to assert & clear */ } return 3; /* no i/f present: mmm.. this should be a 4 -ml */ } if (OK_STAT(GET_STAT(),READY_STAT,BUSY_STAT) || drive->present || cmd == WIN_PIDENTIFY) { if ((rc = try_to_identify(drive,cmd))) /* send cmd and wait */ rc = try_to_identify(drive,cmd); /* failed: try again */ if (rc == 1 && cmd == WIN_PIDENTIFY && drive->autotune != 2) { unsigned long timeout; printk("%s: no response (status = 0x%02x), resetting drive\n", drive->name, GET_STAT()); ide_delay_50ms(); OUT_BYTE (drive->select.all, IDE_SELECT_REG); ide_delay_50ms(); OUT_BYTE(WIN_SRST, IDE_COMMAND_REG); timeout = jiffies; while ((GET_STAT() & BUSY_STAT) && time_before(jiffies, timeout + WAIT_WORSTCASE)) ide_delay_50ms(); rc = try_to_identify(drive, cmd); } if (rc == 1) printk("%s: no response (status = 0x%02x)\n", drive->name, GET_STAT()); (void) GET_STAT(); /* ensure drive irq is clear */ } else { rc = 3; /* not present or maybe ATAPI */ } if (drive->select.b.unit != 0) { SELECT_DRIVE(hwif,&hwif->drives[0]); /* exit with drive0 selected */ ide_delay_50ms(); (void) GET_STAT(); /* ensure drive irq is clear */ } return rc; } /* * */ static void enable_nest (ide_drive_t *drive) { unsigned long timeout; printk("%s: enabling %s -- ", HWIF(drive)->name, drive->id->model); SELECT_DRIVE(HWIF(drive), drive); ide_delay_50ms(); OUT_BYTE(EXABYTE_ENABLE_NEST, IDE_COMMAND_REG); timeout = jiffies + WAIT_WORSTCASE; do { if (jiffies > timeout) { printk("failed (timeout)\n"); return; } ide_delay_50ms(); } while (GET_STAT() & BUSY_STAT); ide_delay_50ms(); if (!OK_STAT(GET_STAT(), 0, BAD_STAT)) printk("failed (status = 0x%02x)\n", GET_STAT()); else printk("success\n"); if (do_probe(drive, WIN_IDENTIFY) >= 2) { /* if !(success||timed-out) */ (void) do_probe(drive, WIN_PIDENTIFY); /* look for ATAPI device */ } } /* * probe_for_drive() tests for existence of a given drive using do_probe(). * * Returns: 0 no device was found * 1 device was found (note: drive->present might still be 0) */ static inline byte probe_for_drive (ide_drive_t *drive) { if (drive->noprobe) /* skip probing? */ return drive->present; if (do_probe(drive, WIN_IDENTIFY) >= 2) { /* if !(success||timed-out) */ (void) do_probe(drive, WIN_PIDENTIFY); /* look for ATAPI device */ } if (drive->id && strstr(drive->id->model, "E X A B Y T E N E S T")) enable_nest(drive); if (!drive->present) return 0; /* drive not found */ if (drive->id == NULL) { /* identification failed? */ if (drive->media == ide_disk) { printk ("%s: non-IDE drive, CHS=%d/%d/%d\n", drive->name, drive->cyl, drive->head, drive->sect); } else if (drive->media == ide_cdrom) { printk("%s: ATAPI cdrom (?)\n", drive->name); } else { drive->present = 0; /* nuke it */ } } return 1; /* drive was found */ } /* * Calculate the region that this interface occupies, * handling interfaces where the registers may not be * ordered sanely. We deal with the CONTROL register * separately. */ static int hwif_check_regions (ide_hwif_t *hwif) { int region_errors = 0; hwif->straight8 = 0; region_errors = ide_check_region(hwif->io_ports[IDE_DATA_OFFSET], 1); region_errors += ide_check_region(hwif->io_ports[IDE_ERROR_OFFSET], 1); region_errors += ide_check_region(hwif->io_ports[IDE_NSECTOR_OFFSET], 1); region_errors += ide_check_region(hwif->io_ports[IDE_SECTOR_OFFSET], 1); region_errors += ide_check_region(hwif->io_ports[IDE_LCYL_OFFSET], 1); region_errors += ide_check_region(hwif->io_ports[IDE_HCYL_OFFSET], 1); region_errors += ide_check_region(hwif->io_ports[IDE_SELECT_OFFSET], 1); region_errors += ide_check_region(hwif->io_ports[IDE_STATUS_OFFSET], 1); if (hwif->io_ports[IDE_CONTROL_OFFSET]) region_errors += ide_check_region(hwif->io_ports[IDE_CONTROL_OFFSET], 1); #if defined(CONFIG_AMIGA) || defined(CONFIG_MAC) if (hwif->io_ports[IDE_IRQ_OFFSET]) region_errors += ide_check_region(hwif->io_ports[IDE_IRQ_OFFSET], 1); #endif /* (CONFIG_AMIGA) || (CONFIG_MAC) */ /* * If any errors are return, we drop the hwif interface. */ return(region_errors); } static void hwif_register (ide_hwif_t *hwif) { if (((unsigned long)hwif->io_ports[IDE_DATA_OFFSET] | 7) == ((unsigned long)hwif->io_ports[IDE_STATUS_OFFSET])) { ide_request_region(hwif->io_ports[IDE_DATA_OFFSET], 8, hwif->name); hwif->straight8 = 1; goto jump_straight8; } if (hwif->io_ports[IDE_DATA_OFFSET]) ide_request_region(hwif->io_ports[IDE_DATA_OFFSET], 1, hwif->name); if (hwif->io_ports[IDE_ERROR_OFFSET]) ide_request_region(hwif->io_ports[IDE_ERROR_OFFSET], 1, hwif->name); if (hwif->io_ports[IDE_NSECTOR_OFFSET]) ide_request_region(hwif->io_ports[IDE_NSECTOR_OFFSET], 1, hwif->name); if (hwif->io_ports[IDE_SECTOR_OFFSET]) ide_request_region(hwif->io_ports[IDE_SECTOR_OFFSET], 1, hwif->name); if (hwif->io_ports[IDE_LCYL_OFFSET]) ide_request_region(hwif->io_ports[IDE_LCYL_OFFSET], 1, hwif->name); if (hwif->io_ports[IDE_HCYL_OFFSET]) ide_request_region(hwif->io_ports[IDE_HCYL_OFFSET], 1, hwif->name); if (hwif->io_ports[IDE_SELECT_OFFSET]) ide_request_region(hwif->io_ports[IDE_SELECT_OFFSET], 1, hwif->name); if (hwif->io_ports[IDE_STATUS_OFFSET]) ide_request_region(hwif->io_ports[IDE_STATUS_OFFSET], 1, hwif->name); jump_straight8: if (hwif->io_ports[IDE_CONTROL_OFFSET]) ide_request_region(hwif->io_ports[IDE_CONTROL_OFFSET], 1, hwif->name); #if defined(CONFIG_AMIGA) || defined(CONFIG_MAC) if (hwif->io_ports[IDE_IRQ_OFFSET]) ide_request_region(hwif->io_ports[IDE_IRQ_OFFSET], 1, hwif->name); #endif /* (CONFIG_AMIGA) || (CONFIG_MAC) */ } /* * This routine only knows how to look for drive units 0 and 1 * on an interface, so any setting of MAX_DRIVES > 2 won't work here. */ static void probe_hwif (ide_hwif_t *hwif) { unsigned int unit; unsigned long flags; if (hwif->noprobe) return; #ifdef CONFIG_BLK_DEV_IDE if (hwif->io_ports[IDE_DATA_OFFSET] == HD_DATA) { extern void probe_cmos_for_drives(ide_hwif_t *); probe_cmos_for_drives (hwif); } #endif if ((hwif->chipset != ide_4drives || !hwif->mate->present) && #if CONFIG_BLK_DEV_PDC4030 (hwif->chipset != ide_pdc4030 || hwif->channel == 0) && #endif /* CONFIG_BLK_DEV_PDC4030 */ (hwif_check_regions(hwif))) { int msgout = 0; for (unit = 0; unit < MAX_DRIVES; ++unit) { ide_drive_t *drive = &hwif->drives[unit]; if (drive->present) { drive->present = 0; printk("%s: ERROR, PORTS ALREADY IN USE\n", drive->name); msgout = 1; } } if (!msgout) printk("%s: ports already in use, skipping probe\n", hwif->name); return; } __save_flags(flags); /* local CPU only */ __sti(); /* local CPU only; needed for jiffies and irq probing */ /* * Second drive should only exist if first drive was found, * but a lot of cdrom drives are configured as single slaves. */ for (unit = 0; unit < MAX_DRIVES; ++unit) { ide_drive_t *drive = &hwif->drives[unit]; (void) probe_for_drive (drive); if (drive->present && !hwif->present) { hwif->present = 1; if (hwif->chipset != ide_4drives || !hwif->mate->present) { hwif_register(hwif); } } } if (hwif->io_ports[IDE_CONTROL_OFFSET] && hwif->reset) { unsigned long timeout = jiffies + WAIT_WORSTCASE; byte stat; printk("%s: reset\n", hwif->name); OUT_BYTE(12, hwif->io_ports[IDE_CONTROL_OFFSET]); udelay(10); OUT_BYTE(8, hwif->io_ports[IDE_CONTROL_OFFSET]); do { ide_delay_50ms(); stat = IN_BYTE(hwif->io_ports[IDE_STATUS_OFFSET]); } while ((stat & BUSY_STAT) && 0 < (signed long)(timeout - jiffies)); } __restore_flags(flags); /* local CPU only */ for (unit = 0; unit < MAX_DRIVES; ++unit) { ide_drive_t *drive = &hwif->drives[unit]; if (drive->present) { ide_tuneproc_t *tuneproc = HWIF(drive)->tuneproc; if (tuneproc != NULL && drive->autotune == 1) tuneproc(drive, 255); /* auto-tune PIO mode */ } } } #if MAX_HWIFS > 1 /* * save_match() is used to simplify logic in init_irq() below. * * A loophole here is that we may not know about a particular * hwif's irq until after that hwif is actually probed/initialized.. * This could be a problem for the case where an hwif is on a * dual interface that requires serialization (eg. cmd640) and another * hwif using one of the same irqs is initialized beforehand. * * This routine detects and reports such situations, but does not fix them. */ static void save_match (ide_hwif_t *hwif, ide_hwif_t *new, ide_hwif_t **match) { ide_hwif_t *m = *match; if (m && m->hwgroup && m->hwgroup != new->hwgroup) { if (!new->hwgroup) return; printk("%s: potential irq problem with %s and %s\n", hwif->name, new->name, m->name); } if (!m || m->irq != hwif->irq) /* don't undo a prior perfect match */ *match = new; } #endif /* MAX_HWIFS > 1 */ /* * init request queue */ static void ide_init_queue(ide_drive_t *drive) { request_queue_t *q = &drive->queue; q->queuedata = HWGROUP(drive); blk_init_queue(q, do_ide_request); } /* * This routine sets up the irq for an ide interface, and creates a new * hwgroup for the irq/hwif if none was previously assigned. * * Much of the code is for correctly detecting/handling irq sharing * and irq serialization situations. This is somewhat complex because * it handles static as well as dynamic (PCMCIA) IDE interfaces. * * The SA_INTERRUPT in sa_flags means ide_intr() is always entered with * interrupts completely disabled. This can be bad for interrupt latency, * but anything else has led to problems on some machines. We re-enable * interrupts as much as we can safely do in most places. */ static int init_irq (ide_hwif_t *hwif) { unsigned long flags; unsigned int index; ide_hwgroup_t *hwgroup; ide_hwif_t *match = NULL; save_flags(flags); /* all CPUs */ cli(); /* all CPUs */ hwif->hwgroup = NULL; #if MAX_HWIFS > 1 /* * Group up with any other hwifs that share our irq(s). */ for (index = 0; index < MAX_HWIFS; index++) { ide_hwif_t *h = &ide_hwifs[index]; if (h->hwgroup) { /* scan only initialized hwif's */ if (hwif->irq == h->irq) { hwif->sharing_irq = h->sharing_irq = 1; if (hwif->chipset != ide_pci || h->chipset != ide_pci) { save_match(hwif, h, &match); } } if (hwif->serialized) { if (hwif->mate && hwif->mate->irq == h->irq) save_match(hwif, h, &match); } if (h->serialized) { if (h->mate && hwif->irq == h->mate->irq) save_match(hwif, h, &match); } } } #endif /* MAX_HWIFS > 1 */ /* * If we are still without a hwgroup, then form a new one */ if (match) { hwgroup = match->hwgroup; } else { hwgroup = kmalloc(sizeof(ide_hwgroup_t), GFP_KERNEL); memset(hwgroup, 0, sizeof(ide_hwgroup_t)); hwgroup->hwif = hwif->next = hwif; hwgroup->rq = NULL; hwgroup->handler = NULL; hwgroup->drive = NULL; hwgroup->busy = 0; init_timer(&hwgroup->timer); hwgroup->timer.function = &ide_timer_expiry; hwgroup->timer.data = (unsigned long) hwgroup; } /* * Allocate the irq, if not already obtained for another hwif */ if (!match || match->irq != hwif->irq) { #ifdef CONFIG_IDEPCI_SHARE_IRQ int sa = (hwif->chipset == ide_pci) ? SA_SHIRQ : SA_INTERRUPT; #else /* !CONFIG_IDEPCI_SHARE_IRQ */ int sa = (hwif->chipset == ide_pci) ? SA_INTERRUPT|SA_SHIRQ : SA_INTERRUPT; #endif /* CONFIG_IDEPCI_SHARE_IRQ */ if (ide_request_irq(hwif->irq, &ide_intr, sa, hwif->name, hwgroup)) { if (!match) kfree(hwgroup); restore_flags(flags); /* all CPUs */ return 1; } } /* * Everything is okay, so link us into the hwgroup */ hwif->hwgroup = hwgroup; hwif->next = hwgroup->hwif->next; hwgroup->hwif->next = hwif; for (index = 0; index < MAX_DRIVES; ++index) { ide_drive_t *drive = &hwif->drives[index]; if (!drive->present) continue; if (!hwgroup->drive) hwgroup->drive = drive; drive->next = hwgroup->drive->next; hwgroup->drive->next = drive; ide_init_queue(drive); } if (!hwgroup->hwif) { hwgroup->hwif = HWIF(hwgroup->drive); #ifdef DEBUG printk("%s : Adding missed hwif to hwgroup!!\n", hwif->name); #endif } restore_flags(flags); /* all CPUs; safe now that hwif->hwgroup is set up */ #if !defined(__mc68000__) && !defined(CONFIG_APUS) && !defined(__sparc__) printk("%s at 0x%03x-0x%03x,0x%03x on irq %d", hwif->name, hwif->io_ports[IDE_DATA_OFFSET], hwif->io_ports[IDE_DATA_OFFSET]+7, hwif->io_ports[IDE_CONTROL_OFFSET], hwif->irq); #elif defined(__sparc__) printk("%s at 0x%03lx-0x%03lx,0x%03lx on irq %s", hwif->name, hwif->io_ports[IDE_DATA_OFFSET], hwif->io_ports[IDE_DATA_OFFSET]+7, hwif->io_ports[IDE_CONTROL_OFFSET], __irq_itoa(hwif->irq)); #else printk("%s at %p on irq 0x%08x", hwif->name, hwif->io_ports[IDE_DATA_OFFSET], hwif->irq); #endif /* __mc68000__ && CONFIG_APUS */ if (match) printk(" (%sed with %s)", hwif->sharing_irq ? "shar" : "serializ", match->name); printk("\n"); return 0; } /* * init_gendisk() (as opposed to ide_geninit) is called for each major device, * after probing for drives, to allocate partition tables and other data * structures needed for the routines in genhd.c. ide_geninit() gets called * somewhat later, during the partition check. */ static void init_gendisk (ide_hwif_t *hwif) { struct gendisk *gd, **gdp; unsigned int unit, units, minors; int *bs, *max_sect, *max_ra; extern devfs_handle_t ide_devfs_handle; /* figure out maximum drive number on the interface */ for (units = MAX_DRIVES; units > 0; --units) { if (hwif->drives[units-1].present) break; } minors = units * (1<sizes = kmalloc (minors * sizeof(int), GFP_KERNEL); gd->part = kmalloc (minors * sizeof(struct hd_struct), GFP_KERNEL); bs = kmalloc (minors*sizeof(int), GFP_KERNEL); max_sect = kmalloc (minors*sizeof(int), GFP_KERNEL); max_ra = kmalloc (minors*sizeof(int), GFP_KERNEL); memset(gd->part, 0, minors * sizeof(struct hd_struct)); /* cdroms and msdos f/s are examples of non-1024 blocksizes */ blksize_size[hwif->major] = bs; max_sectors[hwif->major] = max_sect; max_readahead[hwif->major] = max_ra; for (unit = 0; unit < minors; ++unit) { *bs++ = BLOCK_SIZE; #ifdef CONFIG_BLK_DEV_PDC4030 *max_sect++ = ((hwif->chipset == ide_pdc4030) ? 127 : MAX_SECTORS); #else *max_sect++ = MAX_SECTORS; #endif *max_ra++ = MAX_READAHEAD; } for (unit = 0; unit < units; ++unit) hwif->drives[unit].part = &gd->part[unit << PARTN_BITS]; gd->major = hwif->major; /* our major device number */ gd->major_name = IDE_MAJOR_NAME; /* treated special in genhd.c */ gd->minor_shift = PARTN_BITS; /* num bits for partitions */ gd->max_p = 1<nr_real = units; /* current num real drives */ gd->real_devices= hwif; /* ptr to internal data */ gd->next = NULL; /* linked list of major devs */ gd->fops = ide_fops; /* file operations */ gd->de_arr = kmalloc (sizeof *gd->de_arr * units, GFP_KERNEL); gd->flags = kmalloc (sizeof *gd->flags * units, GFP_KERNEL); if (gd->de_arr) memset (gd->de_arr, 0, sizeof *gd->de_arr * units); if (gd->flags) memset (gd->flags, 0, sizeof *gd->flags * units); for (gdp = &gendisk_head; *gdp; gdp = &((*gdp)->next)) ; hwif->gd = *gdp = gd; /* link onto tail of list */ for (unit = 0; unit < units; ++unit) { if (hwif->drives[unit].present) { char name[64]; ide_add_generic_settings(hwif->drives + unit); hwif->drives[unit].dn = ((hwif->channel ? 2 : 0) + unit); sprintf (name, "host%d/bus%d/target%d/lun%d", (hwif->channel && hwif->mate) ? hwif->mate->index : hwif->index, hwif->channel, unit, hwif->drives[unit].lun); hwif->drives[unit].de = devfs_mk_dir (ide_devfs_handle, name, NULL); } } } static int hwif_init (ide_hwif_t *hwif) { if (!hwif->present) return 0; if (!hwif->irq) { if (!(hwif->irq = ide_default_irq(hwif->io_ports[IDE_DATA_OFFSET]))) { printk("%s: DISABLED, NO IRQ\n", hwif->name); return (hwif->present = 0); } } #ifdef CONFIG_BLK_DEV_HD if (hwif->irq == HD_IRQ && hwif->io_ports[IDE_DATA_OFFSET] != HD_DATA) { printk("%s: CANNOT SHARE IRQ WITH OLD HARDDISK DRIVER (hd.c)\n", hwif->name); return (hwif->present = 0); } #endif /* CONFIG_BLK_DEV_HD */ hwif->present = 0; /* we set it back to 1 if all is ok below */ if (devfs_register_blkdev (hwif->major, hwif->name, ide_fops)) { printk("%s: UNABLE TO GET MAJOR NUMBER %d\n", hwif->name, hwif->major); return (hwif->present = 0); } if (init_irq(hwif)) { int i = hwif->irq; /* * It failed to initialise. Find the default IRQ for * this port and try that. */ if (!(hwif->irq = ide_default_irq(hwif->io_ports[IDE_DATA_OFFSET]))) { printk("%s: Disabled unable to get IRQ %d.\n", hwif->name, i); (void) unregister_blkdev (hwif->major, hwif->name); return (hwif->present = 0); } if (init_irq(hwif)) { printk("%s: probed IRQ %d and default IRQ %d failed.\n", hwif->name, i, hwif->irq); (void) unregister_blkdev (hwif->major, hwif->name); return (hwif->present = 0); } printk("%s: probed IRQ %d failed, using default.\n", hwif->name, hwif->irq); } init_gendisk(hwif); blk_dev[hwif->major].data = hwif; blk_dev[hwif->major].queue = ide_get_queue; read_ahead[hwif->major] = 8; /* (4kB) */ hwif->present = 1; /* success */ #if (DEBUG_SPINLOCK > 0) { static int done = 0; if (!done++) printk("io_request_lock is %p\n", &io_request_lock); /* FIXME */ } #endif return hwif->present; } int ideprobe_init (void); static ide_module_t ideprobe_module = { IDE_PROBE_MODULE, ideprobe_init, NULL }; int ideprobe_init (void) { unsigned int index; int probe[MAX_HWIFS]; MOD_INC_USE_COUNT; memset(probe, 0, MAX_HWIFS * sizeof(int)); for (index = 0; index < MAX_HWIFS; ++index) probe[index] = !ide_hwifs[index].present; /* * Probe for drives in the usual way.. CMOS/BIOS, then poke at ports */ for (index = 0; index < MAX_HWIFS; ++index) if (probe[index]) probe_hwif(&ide_hwifs[index]); for (index = 0; index < MAX_HWIFS; ++index) if (probe[index]) hwif_init(&ide_hwifs[index]); if (!ide_probe) ide_probe = &ideprobe_module; MOD_DEC_USE_COUNT; return 0; } #ifdef MODULE int init_module (void) { unsigned int index; for (index = 0; index < MAX_HWIFS; ++index) ide_unregister(index); ideprobe_init(); create_proc_ide_interfaces(); return 0; } void cleanup_module (void) { ide_probe = NULL; } #endif /* MODULE */