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[/] [or1k/] [trunk/] [linux/] [linux-2.4/] [drivers/] [ide/] [ide-probe.c] - Rev 1780
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/* * linux/drivers/ide/ide-probe.c Version 1.11 Mar 05, 2003 * * Copyright (C) 1994-1998 Linus Torvalds & authors (see below) */ /* * Mostly written by Mark Lord <mlord@pobox.com> * and Gadi Oxman <gadio@netvision.net.il> * and Andre Hedrick <andre@linux-ide.org> * * See linux/MAINTAINERS for address of current maintainer. * * This is the IDE probe module, as evolved from hd.c and ide.c. * * Version 1.00 move drive probing code from ide.c to ide-probe.c * Version 1.01 fix compilation problem for m68k * Version 1.02 increase WAIT_PIDENTIFY to avoid CD-ROM locking at boot * by Andrea Arcangeli * Version 1.03 fix for (hwif->chipset == ide_4drives) * Version 1.04 fixed buggy treatments of known flash memory cards * * Version 1.05 fix for (hwif->chipset == ide_pdc4030) * added ide6/7/8/9 * allowed for secondary flash card to be detectable * with new flag : drive->ata_flash : 1; * Version 1.06 stream line request queue and prep for cascade project. * Version 1.07 max_sect <= 255; slower disks would get behind and * then fall over when they get to 256. Paul G. * Version 1.10 Update set for new IDE. drive->id is now always * valid after probe time even with noprobe */ #undef REALLY_SLOW_IO /* most systems can safely undef this */ #include <linux/config.h> #include <linux/module.h> #include <linux/types.h> #include <linux/string.h> #include <linux/kernel.h> #include <linux/timer.h> #include <linux/mm.h> #include <linux/interrupt.h> #include <linux/major.h> #include <linux/errno.h> #include <linux/genhd.h> #include <linux/slab.h> #include <linux/delay.h> #include <linux/ide.h> #include <linux/spinlock.h> #include <linux/pci.h> #include <linux/kmod.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; } /** * drive_is_flashcard - check for compact flash * @drive: drive to check * * CompactFlash cards and their brethern pretend to be removable * hard disks, except: * (1) they never have a slave unit, and * (2) they don't have doorlock mechanisms. * This test catches them, and is invoked elsewhere when setting * appropriate config bits. * * FIXME: This treatment is probably applicable for *all* PCMCIA (PC CARD) * devices, so in linux 2.3.x we should change this to just treat all * PCMCIA drives this way, and get rid of the model-name tests below * (too big of an interface change for 2.4.x). * At that time, we might also consider parameterizing the timeouts and * retries, since these are MUCH faster than mechanical drives. -M.Lord */ static inline int drive_is_flashcard (ide_drive_t *drive) { struct hd_driveid *id = drive->id; if (drive->removable && id != NULL) { if (id->config == 0x848a) return 1; /* CompactFlash */ if (!strncmp(id->model, "KODAK ATA_FLASH", 15) /* Kodak */ || !strncmp(id->model, "Hitachi CV", 10) /* Hitachi */ || !strncmp(id->model, "SunDisk SDCFB", 13) /* old SanDisk */ || !strncmp(id->model, "SanDisk SDCFB", 13) /* SanDisk */ || !strncmp(id->model, "HAGIWARA HPC", 12) /* Hagiwara */ || !strncmp(id->model, "LEXAR ATA_FLASH", 15) /* Lexar */ || !strncmp(id->model, "ATA_FLASH", 9)) /* Simple Tech */ { return 1; /* yes, it is a flash memory card */ } } return 0; /* no, it is not a flash memory card */ } /** * do_identify - identify a drive * @drive: drive to identify * @cmd: command used * * Called when we have issued a drive identify command to * read and parse the results. This function is run with * interrupts disabled. */ static inline void do_identify (ide_drive_t *drive, u8 cmd) { ide_hwif_t *hwif = HWIF(drive); int bswap = 1; struct hd_driveid *id; /* called with interrupts disabled! */ 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 (!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); goto err_misc; } #endif /* CONFIG_SCSI_EATA_DMA || CONFIG_SCSI_EATA_PIO */ /* * WIN_IDENTIFY returns little-endian info, * WIN_PIDENTIFY *usually* returns little-endian info. */ if (cmd == WIN_PIDENTIFY) { if ((id->model[0] == 'N' && id->model[1] == 'E') /* NEC */ || (id->model[0] == 'F' && id->model[1] == 'X') /* Mitsumi */ || (id->model[0] == 'P' && id->model[1] == 'i'))/* Pioneer */ /* Vertos drives may still be weird */ bswap ^= 1; } ide_fixstring(id->model, sizeof(id->model), bswap); ide_fixstring(id->fw_rev, sizeof(id->fw_rev), bswap); ide_fixstring(id->serial_no, sizeof(id->serial_no), bswap); if (strstr(id->model, "E X A B Y T E N E S T")) goto err_misc; /* we depend on this a lot! */ id->model[sizeof(id->model)-1] = '\0'; printk("%s: %s, ", drive->name, id->model); drive->present = 1; drive->dead = 0; /* * Check for an ATAPI device */ if (cmd == WIN_PIDENTIFY) { u8 type = (id->config >> 8) & 0x1f; printk("ATAPI "); #ifdef CONFIG_BLK_DEV_PDC4030 if (hwif->channel == 1 && hwif->chipset == ide_pdc4030) { printk(" -- not supported on 2nd Promise port\n"); goto err_misc; } #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"); 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; 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: */ drive->is_flash = 0; if (drive_is_flashcard(drive)) { #if 0 /* The new IDE adapter widgets don't follow this heuristic so we must nowdays just bite the bullet and take the probe hit */ ide_drive_t *mate = &hwif->drives[1^drive->select.b.unit]; if (!mate->ata_flash) { mate->present = 0; mate->noprobe = 1; } #endif drive->is_flash = 1; } drive->media = ide_disk; printk("%s DISK drive\n", (drive->is_flash) ? "CFA" : "ATA" ); QUIRK_LIST(drive); return; err_misc: kfree(id); drive->present = 0; return; } /** * actual_try_to_identify - send ata/atapi identify * @drive: drive to identify * @cmd: comamnd 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; ide_ioreg_t hd_status; unsigned long timeout; u8 s = 0, a = 0; if (IDE_CONTROL_REG) { /* take a deep breath */ ide_delay_50ms(); 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 { ide_delay_50ms(); 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); if (hwif->identify != NULL) { if (hwif->identify(drive)) return 1; } else { /* 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 */ ide_delay_50ms(); } while ((hwif->INB(hd_status)) & BUSY_STAT); /* wait for IRQ and DRQ_STAT */ ide_delay_50ms(); 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: comamnd 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; if (IDE_CONTROL_REG && !hwif->irq) { autoprobe = 1; cookie = probe_irq_on(); /* enable device irq */ hwif->OUTB(drive->ctl, IDE_CONTROL_REG); } retval = actual_try_to_identify(drive, cmd); if (autoprobe) { int irq; /* mask device irq */ hwif->OUTB(drive->ctl|2, IDE_CONTROL_REG); /* clear drive IRQ */ (void) hwif->INB(IDE_STATUS_REG); udelay(5); irq = probe_irq_off(cookie); if (!hwif->irq) { if (irq > 0) { hwif->irq = irq; } else { /* Mmmm.. multiple IRQs.. * don't know which was ours */ printk("%s: IRQ probe failed (0x%lx)\n", drive->name, cookie); #ifdef CONFIG_BLK_DEV_CMD640 #ifdef CMD640_DUMP_REGS if (hwif->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 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) */ ide_delay_50ms(); SELECT_DRIVE(drive); ide_delay_50ms(); 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 */ ide_delay_50ms(); } /* 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)); ide_delay_50ms(); hwif->OUTB(drive->select.all, IDE_SELECT_REG); ide_delay_50ms(); hwif->OUTB(WIN_SRST, IDE_COMMAND_REG); timeout = jiffies; while (((hwif->INB(IDE_STATUS_REG)) & 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, 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]); ide_delay_50ms(); /* 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); ide_delay_50ms(); hwif->OUTB(EXABYTE_ENABLE_NEST, IDE_COMMAND_REG); timeout = jiffies + WAIT_WORSTCASE; do { if (time_after(jiffies, timeout)) { printk("failed (timeout)\n"); return; } ide_delay_50ms(); } while ((hwif->INB(IDE_STATUS_REG)) & BUSY_STAT); ide_delay_50ms(); 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); } } /** * ide_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) */ u8 ide_probe_for_drive (ide_drive_t *drive) { /* * In order to keep things simple we have an id * block for all drives at all times. If the device * is pre ATA or refuses ATA/ATAPI identify we * will add faked data to this. * * Also note that 0 everywhere means "can't do X" */ drive->id = kmalloc(SECTOR_WORDS *4, GFP_KERNEL); drive->id_read = 0; if(drive->id == NULL) { printk(KERN_ERR "ide: out of memory for id data.\n"); return 0; } memset(drive->id, 0, SECTOR_WORDS * 4); strcpy(drive->id->model, "UNKNOWN"); /* skip probing? */ if (!drive->noprobe) { /* if !(success||timed-out) */ if (do_probe(drive, WIN_IDENTIFY) >= 2) { /* look for ATAPI device */ (void) do_probe(drive, WIN_PIDENTIFY); } if (strstr(drive->id->model, "E X A B Y T E N E S T")) enable_nest(drive); if (!drive->present) /* drive not found */ return 0; /* identification failed? */ if (!drive->id_read) { if (drive->media == ide_disk) { printk(KERN_INFO "%s: non-IDE drive, CHS=%d/%d/%d\n", drive->name, drive->cyl, drive->head, drive->sect); } else if (drive->media == ide_cdrom) { printk(KERN_INFO "%s: ATAPI cdrom (?)\n", drive->name); } else { /* nuke it */ printk(KERN_WARNING "%s: Unknown device on bus refused identification. Ignoring.\n", drive->name); drive->present = 0; } } /* drive was found */ } if(!drive->present) return 0; /* The drive wasn't being helpful. Add generic info only */ if(!drive->id_read) generic_id(drive); return drive->present; } #define hwif_check_region(addr, num) \ ((hwif->mmio) ? check_mem_region((addr),(num)) : check_region((addr),(num))) /** * hwif_check_regions - check resources for IDE * @hwif: interface to use * * Checks if all the needed resources for an interface are free * providing the interface is PIO. Right now core IDE code does * this work which is deeply wrong. MMIO leaves it to the controller * driver, PIO will migrate this way over time */ static int hwif_check_regions (ide_hwif_t *hwif) { u32 i = 0; int addr_errs = 0; if (hwif->mmio == 2) return 0; addr_errs = hwif_check_region(hwif->io_ports[IDE_DATA_OFFSET], 1); for (i = IDE_ERROR_OFFSET; i <= IDE_STATUS_OFFSET; i++) addr_errs += hwif_check_region(hwif->io_ports[i], 1); if (hwif->io_ports[IDE_CONTROL_OFFSET]) addr_errs += hwif_check_region(hwif->io_ports[IDE_CONTROL_OFFSET], 1); #if defined(CONFIG_AMIGA) || defined(CONFIG_MAC) if (hwif->io_ports[IDE_IRQ_OFFSET]) addr_errs += hwif_check_region(hwif->io_ports[IDE_IRQ_OFFSET], 1); #endif /* (CONFIG_AMIGA) || (CONFIG_MAC) */ /* If any errors are return, we drop the hwif interface. */ hwif->straight8 = 0; return(addr_errs); } //EXPORT_SYMBOL(hwif_check_regions); #define hwif_request_region(addr, num, name) \ ((hwif->mmio) ? request_mem_region((addr),(num),(name)) : request_region((addr),(num),(name))) static void hwif_register (ide_hwif_t *hwif) { u32 i = 0; if (hwif->mmio == 2) return; if (hwif->io_ports[IDE_CONTROL_OFFSET]) hwif_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]) hwif_request_region(hwif->io_ports[IDE_IRQ_OFFSET], 1, hwif->name); #endif /* (CONFIG_AMIGA) || (CONFIG_MAC) */ if (((unsigned long)hwif->io_ports[IDE_DATA_OFFSET] | 7) == ((unsigned long)hwif->io_ports[IDE_STATUS_OFFSET])) { hwif_request_region(hwif->io_ports[IDE_DATA_OFFSET], 8, hwif->name); hwif->straight8 = 1; return; } for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) hwif_request_region(hwif->io_ports[i], 1, hwif->name); } //EXPORT_SYMBOL(hwif_register); /* * This function waits for the hwif to report a non-busy status * see comments in probe_hwif() */ static int wait_not_busy(ide_hwif_t *hwif, unsigned long timeout) { u8 stat = 0; while(timeout--) { /* Turn this into a schedule() sleep once I'm sure * about locking issues (2.5 work ?) */ mdelay(1); stat = hwif->INB(hwif->io_ports[IDE_STATUS_OFFSET]); if ((stat & BUSY_STAT) == 0) break; /* Assume a value of 0xff means nothing is connected to * the interface and it doesn't implement the pull-down * resistor on D7 */ if (stat == 0xff) break; } return ((stat & BUSY_STAT) == 0) ? 0 : -EBUSY; } int ide_wait_hwif_ready(ide_hwif_t *hwif) { int rc; printk(KERN_INFO "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 = wait_not_busy(hwif, 35000); if (rc) return rc; /* Now make sure both master & slave are ready */ SELECT_DRIVE(&hwif->drives[0]); hwif->OUTB(8, hwif->io_ports[IDE_CONTROL_OFFSET]); mdelay(2); rc = wait_not_busy(hwif, 10000); if (rc) return rc; SELECT_DRIVE(&hwif->drives[1]); hwif->OUTB(8, hwif->io_ports[IDE_CONTROL_OFFSET]); mdelay(2); rc = wait_not_busy(hwif, 10000); /* Exit function with master reselected (let's be sane) */ SELECT_DRIVE(&hwif->drives[0]); return rc; } void ide_probe_reset(ide_hwif_t *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 { ide_delay_50ms(); stat = hwif->INB(hwif->io_ports[IDE_STATUS_OFFSET]); } while ((stat & BUSY_STAT) && time_after(timeout, jiffies)); } } void ide_tune_drives(ide_hwif_t *hwif) { int unit; for (unit = 0; unit < MAX_DRIVES; ++unit) { ide_drive_t *drive = &hwif->drives[unit]; int enable_dma = 1; if (drive->present) { if (hwif->tuneproc != NULL && drive->autotune == IDE_TUNE_AUTO) /* auto-tune PIO mode */ hwif->tuneproc(drive, 255); #ifdef CONFIG_IDEDMA_ONLYDISK if (drive->media != ide_disk) enable_dma = 0; #endif /* * MAJOR HACK BARF :-/ * * FIXME: chipsets own this cruft! */ /* * Move here to prevent module loading clashing. */ // drive->autodma = hwif->autodma; if ((hwif->ide_dma_check) && ((drive->autotune == IDE_TUNE_DEFAULT) || (drive->autotune == IDE_TUNE_AUTO))) { /* * Force DMAing for the beginning of the check. * Some chipsets appear to do interesting * things, if not checked and cleared. * PARANOIA!!! */ hwif->ide_dma_off_quietly(drive); if (enable_dma) hwif->ide_dma_check(drive); } } } } /* * 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. */ void probe_hwif (ide_hwif_t *hwif) { unsigned int unit; unsigned long flags; unsigned int irqd; 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 || !hwif->mate->present) && #if CONFIG_BLK_DEV_PDC4030 (hwif->chipset != ide_pdc4030 || hwif->channel == 0) && #endif /* CONFIG_BLK_DEV_PDC4030 */ (hwif_check_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); #ifdef CONFIG_PPC /* 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 (ide_wait_hwif_ready(hwif)) printk(KERN_WARNING "%s: Wait for ready failed before probe !\n", hwif->name); #endif /* CONFIG_PPC */ /* * Second drive should only exist if first drive was found, * but a lot of cdrom drives are configured as single slaves. */ for (unit = 0; unit < MAX_DRIVES; ++unit) { ide_drive_t *drive = &hwif->drives[unit]; drive->dn = ((hwif->channel ? 2 : 0) + unit); hwif->drives[unit].dn = ((hwif->channel ? 2 : 0) + unit); (void) ide_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); } } } ide_probe_reset(hwif); local_irq_restore(flags); /* * Use cached IRQ number. It might be (and is...) changed by probe * code above */ if (irqd) enable_irq(irqd); ide_tune_drives(hwif); } EXPORT_SYMBOL(probe_hwif); #if 0 int hwif_init (ide_hwif_t *hwif); int probe_hwif_init (ide_hwif_t *hwif) { hwif->initializing = 1; probe_hwif(hwif); hwif_init(hwif); #if 1 if (hwif->present) { u16 unit = 0; for (unit = 0; unit < MAX_DRIVES; ++unit) { ide_drive_t *drive = &hwif->drives[unit]; if (drive->present) { ata_attach(drive); } } } #endif hwif->initializing = 0; return 0; } EXPORT_SYMBOL(probe_hwif_init); #endif #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. */ 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; } EXPORT_SYMBOL(save_match); #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); blk_queue_throttle_sectors(q, 1); } #undef __IRQ_HELL_SPIN /* * 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. */ int init_irq (ide_hwif_t *hwif) { unsigned long flags; unsigned int index; ide_hwgroup_t *hwgroup, *new_hwgroup; ide_hwif_t *match = NULL; #if 0 /* Allocate the buffer and no sleep allowed */ new_hwgroup = kmalloc(sizeof(ide_hwgroup_t),GFP_ATOMIC); #else /* Allocate the buffer and potentially sleep first */ new_hwgroup = kmalloc(sizeof(ide_hwgroup_t),GFP_KERNEL); #endif #ifndef __IRQ_HELL_SPIN save_and_cli(flags); #else spin_lock_irqsave(&io_request_lock, flags); #endif 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; if(new_hwgroup) kfree(new_hwgroup); } else { hwgroup = new_hwgroup; if (!hwgroup) { #ifndef __IRQ_HELL_SPIN restore_flags(flags); #else spin_unlock_irqrestore(&io_request_lock, flags); #endif return 1; } memset(hwgroup, 0, sizeof(ide_hwgroup_t)); hwgroup->hwif = hwif->next = hwif; hwgroup->rq = NULL; hwgroup->handler = NULL; hwgroup->drive = NULL; hwgroup->busy = 0; init_timer(&hwgroup->timer); hwgroup->timer.function = &ide_timer_expiry; hwgroup->timer.data = (unsigned long) hwgroup; } /* * Allocate the irq, if not already obtained for another hwif */ if (!match || match->irq != hwif->irq) { int sa = SA_INTERRUPT; #if defined(__mc68000__) || defined(CONFIG_APUS) sa = SA_SHIRQ; #endif /* __mc68000__ || CONFIG_APUS */ if (IDE_CHIPSET_IS_PCI(hwif->chipset)) { sa = SA_SHIRQ; #ifndef CONFIG_IDEPCI_SHARE_IRQ sa |= SA_INTERRUPT; #endif /* CONFIG_IDEPCI_SHARE_IRQ */ } if (hwif->io_ports[IDE_CONTROL_OFFSET]) /* clear nIEN */ hwif->OUTB(0x08, hwif->io_ports[IDE_CONTROL_OFFSET]); if (request_irq(hwif->irq,&ide_intr,sa,hwif->name,hwgroup)) { if (!match) kfree(hwgroup); #ifndef __IRQ_HELL_SPIN restore_flags(flags); #else spin_unlock_irqrestore(&io_request_lock, flags); #endif 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 } /* all CPUs; safe now that hwif->hwgroup is set up */ #ifndef __IRQ_HELL_SPIN restore_flags(flags); #else spin_unlock_irqrestore(&io_request_lock, flags); #endif #if !defined(__mc68000__) && !defined(CONFIG_APUS) && !defined(__sparc__) printk("%s at 0x%03lx-0x%03lx,0x%03lx on irq %d", hwif->name, hwif->io_ports[IDE_DATA_OFFSET], hwif->io_ports[IDE_DATA_OFFSET]+7, hwif->io_ports[IDE_CONTROL_OFFSET], hwif->irq); #elif defined(__sparc__) printk("%s at 0x%03lx-0x%03lx,0x%03lx on irq %s", hwif->name, hwif->io_ports[IDE_DATA_OFFSET], hwif->io_ports[IDE_DATA_OFFSET]+7, hwif->io_ports[IDE_CONTROL_OFFSET], __irq_itoa(hwif->irq)); #else printk("%s at 0x%08lx on irq %d", hwif->name, hwif->io_ports[IDE_DATA_OFFSET], hwif->irq); #endif /* __mc68000__ && CONFIG_APUS */ if (match) printk(" (%sed with %s)", hwif->sharing_irq ? "shar" : "serializ", match->name); printk("\n"); return 0; } EXPORT_SYMBOL(init_irq); /* * 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; unsigned int unit, units, minors; int *bs, *max_sect, *max_ra; extern devfs_handle_t ide_devfs_handle; units = MAX_DRIVES; minors = units * (1<<PARTN_BITS); gd = kmalloc(sizeof(struct gendisk), GFP_KERNEL); if (!gd) goto err_kmalloc_gd; memset(gd, 0, sizeof(struct gendisk)); gd->sizes = kmalloc(minors * sizeof(int), GFP_KERNEL); if (!gd->sizes) goto err_kmalloc_gd_sizes; gd->part = kmalloc(minors * sizeof(struct hd_struct), GFP_KERNEL); if (!gd->part) goto err_kmalloc_gd_part; bs = kmalloc(minors*sizeof(int), GFP_KERNEL); if (!bs) goto err_kmalloc_bs; max_sect = kmalloc(minors*sizeof(int), GFP_KERNEL); if (!max_sect) goto err_kmalloc_max_sect; max_ra = kmalloc(minors*sizeof(int), GFP_KERNEL); if (!max_ra) goto err_kmalloc_max_ra; 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; /* * IDE can do up to 128K per request == 256 */ *max_sect++ = ((hwif->rqsize) ? hwif->rqsize : 128); *max_ra++ = vm_max_readahead; } for (unit = 0; unit < units; ++unit) hwif->drives[unit].part = &gd->part[unit << PARTN_BITS]; /* our major device number */ gd->major = hwif->major; /* treated special in genhd.c */ gd->major_name = IDE_MAJOR_NAME; /* num bits for partitions */ gd->minor_shift = PARTN_BITS; /* 1 + max partitions / drive */ gd->max_p = 1<<PARTN_BITS; /* current num real drives */ gd->nr_real = units; /* ptr to internal data */ gd->real_devices= hwif; /* linked list of major devs */ gd->next = NULL; /* file operations */ gd->fops = ide_fops; 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); hwif->gd = gd; add_gendisk(gd); for (unit = 0; unit < units; ++unit) { 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); if (hwif->drives[unit].present) hwif->drives[unit].de = devfs_mk_dir(ide_devfs_handle, name, NULL); } return; err_kmalloc_max_ra: kfree(max_sect); err_kmalloc_max_sect: kfree(bs); err_kmalloc_bs: kfree(gd->part); err_kmalloc_gd_part: kfree(gd->sizes); err_kmalloc_gd_sizes: kfree(gd); err_kmalloc_gd: printk(KERN_WARNING "(ide::init_gendisk) Out of memory\n"); return; } EXPORT_SYMBOL(init_gendisk); 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 */ /* we set it back to 1 if all is ok below */ hwif->present = 0; if (devfs_register_blkdev (hwif->major, hwif->name, ide_fops)) { printk("%s: UNABLE TO GET MAJOR NUMBER %d\n", hwif->name, hwif->major); return (hwif->present = 0); } if (init_irq(hwif)) { int i = hwif->irq; /* * It failed to initialise. Find the default IRQ for * this port and try that. */ if (!(hwif->irq = ide_default_irq(hwif->io_ports[IDE_DATA_OFFSET]))) { printk("%s: Disabled unable to get IRQ %d.\n", hwif->name, i); (void) unregister_blkdev(hwif->major, hwif->name); return (hwif->present = 0); } if (init_irq(hwif)) { printk("%s: probed IRQ %d and default IRQ %d failed.\n", hwif->name, i, hwif->irq); (void) unregister_blkdev(hwif->major, hwif->name); return (hwif->present = 0); } printk("%s: probed IRQ %d failed, using default.\n", hwif->name, hwif->irq); } init_gendisk(hwif); blk_dev[hwif->major].data = hwif; blk_dev[hwif->major].queue = ide_get_queue; read_ahead[hwif->major] = 8; /* (4kB) */ hwif->present = 1; /* success */ #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; } EXPORT_SYMBOL(hwif_init); void export_ide_init_queue (ide_drive_t *drive) { ide_init_queue(drive); } EXPORT_SYMBOL(export_ide_init_queue); #ifndef HWIF_PROBE_CLASSIC_METHOD int probe_hwif_init (ide_hwif_t *hwif) { hwif->initializing = 1; probe_hwif(hwif); hwif_init(hwif); #ifndef CLASSIC_BUILTINS_METHOD # ifndef FAKE_CLASSIC_ATTACH_METHOD # ifdef DIRECT_HWIF_PROBE_ATTACH_METHOD if (hwif->present) { u16 unit = 0; for (unit = 0; unit < MAX_DRIVES; ++unit) { ide_drive_t *drive = &hwif->drives[unit]; if (drive->present) ide_attach_drive(drive); } } # endif /* DIRECT_HWIF_PROBE_ATTACH_METHOD */ # endif /* FAKE_CLASSIC_ATTACH_METHOD */ #endif /* CLASSIC_BUILTINS_METHOD */ hwif->initializing = 0; return 0; } EXPORT_SYMBOL(probe_hwif_init); #endif /* HWIF_PROBE_CLASSIC_METHOD */ 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 */ #ifdef HWIF_PROBE_CLASSIC_METHOD 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]); #else /* HWIF_PROBE_CLASSIC_METHOD */ for (index = 0; index < MAX_HWIFS; ++index) if (probe[index]) probe_hwif_init(&ide_hwifs[index]); #endif /* HWIF_PROBE_CLASSIC_METHOD */ if (!ide_probe) ide_probe = &ideprobe_module; MOD_DEC_USE_COUNT; return 0; } #ifdef MODULE extern int (*ide_xlate_1024_hook)(kdev_t, int, int, const char *); static int ideprobe_done = 0; int ideprobe_init_module (void) { unsigned int index; if (ideprobe_done) return -EBUSY; for (index = 0; index < MAX_HWIFS; ++index) ide_unregister(index); ideprobe_init(); create_proc_ide_interfaces(); ide_xlate_1024_hook = ide_xlate_1024; ideprobe_done++; return 0; } void ideprobe_cleanup_module (void) { ide_probe = NULL; ide_xlate_1024_hook = 0; } EXPORT_SYMBOL(ideprobe_init_module); EXPORT_SYMBOL(ideprobe_cleanup_module); MODULE_LICENSE("GPL"); #endif /* MODULE */
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