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/*
* linux/drivers/ide/ide-probe.c Version 1.07 March 18, 2001
*
* 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.
*/
#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 <asm/byteorder.h>
#include <asm/irq.h>
#include <asm/uaccess.h>
#include <asm/io.h>
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 ("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:
*/
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 actual_try_to_identify (ide_drive_t *drive, byte cmd)
{
int rc;
ide_ioreg_t hd_status;
unsigned long timeout;
byte s, a;
if (IDE_CONTROL_REG) {
/* take a deep breath */
ide_delay_50ms();
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)) {
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)) {
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 */
return rc;
}
static int try_to_identify (ide_drive_t *drive, byte cmd)
{
int retval;
int autoprobe = 0;
unsigned long cookie = 0;
if (IDE_CONTROL_REG && !HWIF(drive)->irq) {
autoprobe = 1;
cookie = probe_irq_on();
OUT_BYTE(drive->ctl,IDE_CONTROL_REG); /* enable device irq */
}
retval = actual_try_to_identify(drive, cmd);
if (autoprobe) {
int irq;
OUT_BYTE(drive->ctl|2,IDE_CONTROL_REG); /* mask device irq */
(void) GET_STAT(); /* clear drive IRQ */
udelay(5);
irq = probe_irq_off(cookie);
if (!HWIF(drive)->irq) {
if (irq > 0) {
HWIF(drive)->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(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 retval;
}
/*
* 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, *new_hwgroup;
ide_hwif_t *match = NULL;
/* Allocate the buffer and potentially sleep first */
new_hwgroup = kmalloc(sizeof(ide_hwgroup_t),GFP_KERNEL);
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;
if(new_hwgroup)
kfree(new_hwgroup);
} else {
hwgroup = new_hwgroup;
if (!hwgroup) {
restore_flags(flags); /* all CPUs */
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) {
#ifdef CONFIG_IDEPCI_SHARE_IRQ
int sa = IDE_CHIPSET_IS_PCI(hwif->chipset) ? SA_SHIRQ : SA_INTERRUPT;
#else /* !CONFIG_IDEPCI_SHARE_IRQ */
int sa = IDE_CHIPSET_IS_PCI(hwif->chipset) ? 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;
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<<PARTN_BITS);
gd = kmalloc (sizeof(struct gendisk), GFP_KERNEL);
gd->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 : 255);
#else
/* IDE can do up to 128K per request. */
*max_sect++ = 255;
#endif
*max_ra++ = vm_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<<PARTN_BITS; /* 1 + max partitions / drive */
gd->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);
hwif->gd = gd;
add_gendisk(gd);
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;
}
MODULE_LICENSE("GPL");
#endif /* MODULE */
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