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1680 lines
39 KiB
1680 lines
39 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* Copyright (C) 1994-1998 Linus Torvalds & authors (see below) |
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* Copyright (C) 2005, 2007 Bartlomiej Zolnierkiewicz |
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*/ |
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|
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/* |
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* Mostly written by Mark Lord <[email protected]> |
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* and Gadi Oxman <[email protected]> |
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* and Andre Hedrick <[email protected]> |
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* |
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* See linux/MAINTAINERS for address of current maintainer. |
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* |
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* This is the IDE probe module, as evolved from hd.c and ide.c. |
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* |
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* -- increase WAIT_PIDENTIFY to avoid CD-ROM locking at boot |
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* by Andrea Arcangeli |
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*/ |
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|
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#include <linux/module.h> |
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#include <linux/types.h> |
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#include <linux/string.h> |
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#include <linux/kernel.h> |
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#include <linux/timer.h> |
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#include <linux/mm.h> |
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#include <linux/interrupt.h> |
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#include <linux/major.h> |
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#include <linux/errno.h> |
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#include <linux/genhd.h> |
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#include <linux/slab.h> |
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#include <linux/delay.h> |
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#include <linux/ide.h> |
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#include <linux/spinlock.h> |
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#include <linux/kmod.h> |
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#include <linux/pci.h> |
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#include <linux/scatterlist.h> |
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|
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#include <asm/byteorder.h> |
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#include <asm/irq.h> |
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#include <linux/uaccess.h> |
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#include <asm/io.h> |
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|
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/** |
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* generic_id - add a generic drive id |
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* @drive: drive to make an ID block for |
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* |
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* Add a fake id field to the drive we are passed. This allows |
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* use to skip a ton of NULL checks (which people always miss) |
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* and make drive properties unconditional outside of this file |
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*/ |
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|
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static void generic_id(ide_drive_t *drive) |
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{ |
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u16 *id = drive->id; |
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|
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id[ATA_ID_CUR_CYLS] = id[ATA_ID_CYLS] = drive->cyl; |
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id[ATA_ID_CUR_HEADS] = id[ATA_ID_HEADS] = drive->head; |
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id[ATA_ID_CUR_SECTORS] = id[ATA_ID_SECTORS] = drive->sect; |
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} |
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|
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static void ide_disk_init_chs(ide_drive_t *drive) |
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{ |
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u16 *id = drive->id; |
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|
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/* Extract geometry if we did not already have one for the drive */ |
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if (!drive->cyl || !drive->head || !drive->sect) { |
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drive->cyl = drive->bios_cyl = id[ATA_ID_CYLS]; |
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drive->head = drive->bios_head = id[ATA_ID_HEADS]; |
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drive->sect = drive->bios_sect = id[ATA_ID_SECTORS]; |
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} |
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|
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/* Handle logical geometry translation by the drive */ |
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if (ata_id_current_chs_valid(id)) { |
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drive->cyl = id[ATA_ID_CUR_CYLS]; |
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drive->head = id[ATA_ID_CUR_HEADS]; |
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drive->sect = id[ATA_ID_CUR_SECTORS]; |
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} |
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|
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/* Use physical geometry if what we have still makes no sense */ |
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if (drive->head > 16 && id[ATA_ID_HEADS] && id[ATA_ID_HEADS] <= 16) { |
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drive->cyl = id[ATA_ID_CYLS]; |
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drive->head = id[ATA_ID_HEADS]; |
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drive->sect = id[ATA_ID_SECTORS]; |
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} |
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} |
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|
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static void ide_disk_init_mult_count(ide_drive_t *drive) |
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{ |
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u16 *id = drive->id; |
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u8 max_multsect = id[ATA_ID_MAX_MULTSECT] & 0xff; |
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|
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if (max_multsect) { |
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if ((max_multsect / 2) > 1) |
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id[ATA_ID_MULTSECT] = max_multsect | 0x100; |
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else |
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id[ATA_ID_MULTSECT] &= ~0x1ff; |
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|
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drive->mult_req = id[ATA_ID_MULTSECT] & 0xff; |
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|
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if (drive->mult_req) |
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drive->special_flags |= IDE_SFLAG_SET_MULTMODE; |
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} |
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} |
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static void ide_classify_ata_dev(ide_drive_t *drive) |
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{ |
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u16 *id = drive->id; |
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char *m = (char *)&id[ATA_ID_PROD]; |
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int is_cfa = ata_id_is_cfa(id); |
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|
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/* CF devices are *not* removable in Linux definition of the term */ |
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if (is_cfa == 0 && (id[ATA_ID_CONFIG] & (1 << 7))) |
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drive->dev_flags |= IDE_DFLAG_REMOVABLE; |
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|
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drive->media = ide_disk; |
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|
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if (!ata_id_has_unload(drive->id)) |
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drive->dev_flags |= IDE_DFLAG_NO_UNLOAD; |
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printk(KERN_INFO "%s: %s, %s DISK drive\n", drive->name, m, |
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is_cfa ? "CFA" : "ATA"); |
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} |
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|
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static void ide_classify_atapi_dev(ide_drive_t *drive) |
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{ |
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u16 *id = drive->id; |
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char *m = (char *)&id[ATA_ID_PROD]; |
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u8 type = (id[ATA_ID_CONFIG] >> 8) & 0x1f; |
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|
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printk(KERN_INFO "%s: %s, ATAPI ", drive->name, m); |
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switch (type) { |
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case ide_floppy: |
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if (!strstr(m, "CD-ROM")) { |
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if (!strstr(m, "oppy") && |
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!strstr(m, "poyp") && |
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!strstr(m, "ZIP")) |
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printk(KERN_CONT "cdrom or floppy?, assuming "); |
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if (drive->media != ide_cdrom) { |
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printk(KERN_CONT "FLOPPY"); |
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drive->dev_flags |= IDE_DFLAG_REMOVABLE; |
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break; |
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} |
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} |
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/* Early cdrom models used zero */ |
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type = ide_cdrom; |
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fallthrough; |
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case ide_cdrom: |
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drive->dev_flags |= IDE_DFLAG_REMOVABLE; |
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#ifdef CONFIG_PPC |
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/* kludge for Apple PowerBook internal zip */ |
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if (!strstr(m, "CD-ROM") && strstr(m, "ZIP")) { |
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printk(KERN_CONT "FLOPPY"); |
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type = ide_floppy; |
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break; |
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} |
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#endif |
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printk(KERN_CONT "CD/DVD-ROM"); |
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break; |
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case ide_tape: |
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printk(KERN_CONT "TAPE"); |
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break; |
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case ide_optical: |
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printk(KERN_CONT "OPTICAL"); |
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drive->dev_flags |= IDE_DFLAG_REMOVABLE; |
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break; |
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default: |
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printk(KERN_CONT "UNKNOWN (type %d)", type); |
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break; |
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} |
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|
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printk(KERN_CONT " drive\n"); |
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drive->media = type; |
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/* an ATAPI device ignores DRDY */ |
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drive->ready_stat = 0; |
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if (ata_id_cdb_intr(id)) |
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drive->atapi_flags |= IDE_AFLAG_DRQ_INTERRUPT; |
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drive->dev_flags |= IDE_DFLAG_DOORLOCKING; |
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/* we don't do head unloading on ATAPI devices */ |
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drive->dev_flags |= IDE_DFLAG_NO_UNLOAD; |
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} |
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|
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/** |
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* do_identify - identify a drive |
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* @drive: drive to identify |
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* @cmd: command used |
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* @id: buffer for IDENTIFY data |
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* |
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* Called when we have issued a drive identify command to |
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* read and parse the results. This function is run with |
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* interrupts disabled. |
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*/ |
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|
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static void do_identify(ide_drive_t *drive, u8 cmd, u16 *id) |
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{ |
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ide_hwif_t *hwif = drive->hwif; |
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char *m = (char *)&id[ATA_ID_PROD]; |
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unsigned long flags; |
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int bswap = 1; |
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|
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/* local CPU only; some systems need this */ |
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local_irq_save(flags); |
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/* read 512 bytes of id info */ |
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hwif->tp_ops->input_data(drive, NULL, id, SECTOR_SIZE); |
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local_irq_restore(flags); |
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drive->dev_flags |= IDE_DFLAG_ID_READ; |
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#ifdef DEBUG |
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printk(KERN_INFO "%s: dumping identify data\n", drive->name); |
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ide_dump_identify((u8 *)id); |
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#endif |
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ide_fix_driveid(id); |
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|
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/* |
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* ATA_CMD_ID_ATA returns little-endian info, |
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* ATA_CMD_ID_ATAPI *usually* returns little-endian info. |
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*/ |
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if (cmd == ATA_CMD_ID_ATAPI) { |
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if ((m[0] == 'N' && m[1] == 'E') || /* NEC */ |
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(m[0] == 'F' && m[1] == 'X') || /* Mitsumi */ |
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(m[0] == 'P' && m[1] == 'i')) /* Pioneer */ |
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/* Vertos drives may still be weird */ |
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bswap ^= 1; |
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} |
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ide_fixstring(m, ATA_ID_PROD_LEN, bswap); |
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ide_fixstring((char *)&id[ATA_ID_FW_REV], ATA_ID_FW_REV_LEN, bswap); |
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ide_fixstring((char *)&id[ATA_ID_SERNO], ATA_ID_SERNO_LEN, bswap); |
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|
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/* we depend on this a lot! */ |
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m[ATA_ID_PROD_LEN - 1] = '\0'; |
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if (strstr(m, "E X A B Y T E N E S T")) |
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drive->dev_flags &= ~IDE_DFLAG_PRESENT; |
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else |
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drive->dev_flags |= IDE_DFLAG_PRESENT; |
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} |
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|
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/** |
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* ide_dev_read_id - send ATA/ATAPI IDENTIFY command |
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* @drive: drive to identify |
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* @cmd: command to use |
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* @id: buffer for IDENTIFY data |
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* @irq_ctx: flag set when called from the IRQ context |
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* |
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* Sends an ATA(PI) IDENTIFY request to a drive and waits for a response. |
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* |
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* Returns: 0 device was identified |
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* 1 device timed-out (no response to identify request) |
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* 2 device aborted the command (refused to identify itself) |
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*/ |
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|
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int ide_dev_read_id(ide_drive_t *drive, u8 cmd, u16 *id, int irq_ctx) |
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{ |
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ide_hwif_t *hwif = drive->hwif; |
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struct ide_io_ports *io_ports = &hwif->io_ports; |
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const struct ide_tp_ops *tp_ops = hwif->tp_ops; |
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int use_altstatus = 0, rc; |
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unsigned long timeout; |
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u8 s = 0, a = 0; |
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|
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/* |
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* Disable device IRQ. Otherwise we'll get spurious interrupts |
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* during the identify phase that the IRQ handler isn't expecting. |
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*/ |
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if (io_ports->ctl_addr) |
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tp_ops->write_devctl(hwif, ATA_NIEN | ATA_DEVCTL_OBS); |
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|
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/* take a deep breath */ |
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if (irq_ctx) |
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mdelay(50); |
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else |
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msleep(50); |
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if (io_ports->ctl_addr && |
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(hwif->host_flags & IDE_HFLAG_BROKEN_ALTSTATUS) == 0) { |
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a = tp_ops->read_altstatus(hwif); |
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s = tp_ops->read_status(hwif); |
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if ((a ^ s) & ~ATA_SENSE) |
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/* ancient Seagate drives, broken interfaces */ |
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printk(KERN_INFO "%s: probing with STATUS(0x%02x) " |
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"instead of ALTSTATUS(0x%02x)\n", |
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drive->name, s, a); |
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else |
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/* use non-intrusive polling */ |
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use_altstatus = 1; |
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} |
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|
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/* set features register for atapi |
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* identify command to be sure of reply |
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*/ |
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if (cmd == ATA_CMD_ID_ATAPI) { |
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struct ide_taskfile tf; |
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|
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memset(&tf, 0, sizeof(tf)); |
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/* disable DMA & overlap */ |
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tp_ops->tf_load(drive, &tf, IDE_VALID_FEATURE); |
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} |
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/* ask drive for ID */ |
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tp_ops->exec_command(hwif, cmd); |
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timeout = ((cmd == ATA_CMD_ID_ATA) ? WAIT_WORSTCASE : WAIT_PIDENTIFY) / 2; |
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|
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/* wait for IRQ and ATA_DRQ */ |
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if (irq_ctx) { |
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rc = __ide_wait_stat(drive, ATA_DRQ, BAD_R_STAT, timeout, &s); |
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if (rc) |
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return 1; |
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} else { |
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rc = ide_busy_sleep(drive, timeout, use_altstatus); |
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if (rc) |
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return 1; |
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msleep(50); |
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s = tp_ops->read_status(hwif); |
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} |
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if (OK_STAT(s, ATA_DRQ, BAD_R_STAT)) { |
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/* drive returned ID */ |
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do_identify(drive, cmd, id); |
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/* drive responded with ID */ |
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rc = 0; |
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/* clear drive IRQ */ |
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(void)tp_ops->read_status(hwif); |
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} else { |
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/* drive refused ID */ |
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rc = 2; |
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} |
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return rc; |
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} |
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int ide_busy_sleep(ide_drive_t *drive, unsigned long timeout, int altstatus) |
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{ |
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ide_hwif_t *hwif = drive->hwif; |
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u8 stat; |
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timeout += jiffies; |
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do { |
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msleep(50); /* give drive a breather */ |
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stat = altstatus ? hwif->tp_ops->read_altstatus(hwif) |
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: hwif->tp_ops->read_status(hwif); |
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if ((stat & ATA_BUSY) == 0) |
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return 0; |
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} while (time_before(jiffies, timeout)); |
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|
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printk(KERN_ERR "%s: timeout in %s\n", drive->name, __func__); |
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|
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return 1; /* drive timed-out */ |
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} |
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|
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static u8 ide_read_device(ide_drive_t *drive) |
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{ |
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struct ide_taskfile tf; |
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|
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drive->hwif->tp_ops->tf_read(drive, &tf, IDE_VALID_DEVICE); |
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|
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return tf.device; |
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} |
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|
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/** |
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* do_probe - probe an IDE device |
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* @drive: drive to probe |
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* @cmd: command to use |
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* |
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* do_probe() has the difficult job of finding a drive if it exists, |
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* without getting hung up if it doesn't exist, without trampling on |
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* ethernet cards, and without leaving any IRQs dangling to haunt us later. |
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* |
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* If a drive is "known" to exist (from CMOS or kernel parameters), |
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* but does not respond right away, the probe will "hang in there" |
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* for the maximum wait time (about 30 seconds), otherwise it will |
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* exit much more quickly. |
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* |
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* Returns: 0 device was identified |
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* 1 device timed-out (no response to identify request) |
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* 2 device aborted the command (refused to identify itself) |
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* 3 bad status from device (possible for ATAPI drives) |
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* 4 probe was not attempted because failure was obvious |
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*/ |
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|
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static int do_probe (ide_drive_t *drive, u8 cmd) |
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{ |
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ide_hwif_t *hwif = drive->hwif; |
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const struct ide_tp_ops *tp_ops = hwif->tp_ops; |
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u16 *id = drive->id; |
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int rc; |
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u8 present = !!(drive->dev_flags & IDE_DFLAG_PRESENT), stat; |
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|
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/* avoid waiting for inappropriate probes */ |
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if (present && drive->media != ide_disk && cmd == ATA_CMD_ID_ATA) |
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return 4; |
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|
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#ifdef DEBUG |
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printk(KERN_INFO "probing for %s: present=%d, media=%d, probetype=%s\n", |
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drive->name, present, drive->media, |
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(cmd == ATA_CMD_ID_ATA) ? "ATA" : "ATAPI"); |
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#endif |
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|
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/* needed for some systems |
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* (e.g. crw9624 as drive0 with disk as slave) |
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*/ |
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msleep(50); |
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tp_ops->dev_select(drive); |
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msleep(50); |
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|
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if (ide_read_device(drive) != drive->select && present == 0) { |
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if (drive->dn & 1) { |
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/* exit with drive0 selected */ |
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tp_ops->dev_select(hwif->devices[0]); |
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/* allow ATA_BUSY to assert & clear */ |
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msleep(50); |
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} |
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/* no i/f present: mmm.. this should be a 4 -ml */ |
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return 3; |
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} |
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|
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stat = tp_ops->read_status(hwif); |
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|
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if (OK_STAT(stat, ATA_DRDY, ATA_BUSY) || |
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present || cmd == ATA_CMD_ID_ATAPI) { |
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rc = ide_dev_read_id(drive, cmd, id, 0); |
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if (rc) |
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/* failed: try again */ |
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rc = ide_dev_read_id(drive, cmd, id, 0); |
|
|
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stat = tp_ops->read_status(hwif); |
|
|
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if (stat == (ATA_BUSY | ATA_DRDY)) |
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return 4; |
|
|
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if (rc == 1 && cmd == ATA_CMD_ID_ATAPI) { |
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printk(KERN_ERR "%s: no response (status = 0x%02x), " |
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"resetting drive\n", drive->name, stat); |
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msleep(50); |
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tp_ops->dev_select(drive); |
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msleep(50); |
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tp_ops->exec_command(hwif, ATA_CMD_DEV_RESET); |
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(void)ide_busy_sleep(drive, WAIT_WORSTCASE, 0); |
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rc = ide_dev_read_id(drive, cmd, id, 0); |
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} |
|
|
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/* ensure drive IRQ is clear */ |
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stat = tp_ops->read_status(hwif); |
|
|
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if (rc == 1) |
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printk(KERN_ERR "%s: no response (status = 0x%02x)\n", |
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drive->name, stat); |
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} else { |
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/* not present or maybe ATAPI */ |
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rc = 3; |
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} |
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if (drive->dn & 1) { |
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/* exit with drive0 selected */ |
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tp_ops->dev_select(hwif->devices[0]); |
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msleep(50); |
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/* ensure drive irq is clear */ |
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(void)tp_ops->read_status(hwif); |
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} |
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return rc; |
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} |
|
|
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/** |
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* probe_for_drives - upper level drive probe |
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* @drive: drive to probe for |
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* |
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* probe_for_drive() tests for existence of a given drive using do_probe() |
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* and presents things to the user as needed. |
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* |
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* Returns: 0 no device was found |
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* 1 device was found |
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* (note: IDE_DFLAG_PRESENT might still be not set) |
|
*/ |
|
|
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static u8 probe_for_drive(ide_drive_t *drive) |
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{ |
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char *m; |
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int rc; |
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u8 cmd; |
|
|
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drive->dev_flags &= ~IDE_DFLAG_ID_READ; |
|
|
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m = (char *)&drive->id[ATA_ID_PROD]; |
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strcpy(m, "UNKNOWN"); |
|
|
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/* skip probing? */ |
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if ((drive->dev_flags & IDE_DFLAG_NOPROBE) == 0) { |
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/* if !(success||timed-out) */ |
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cmd = ATA_CMD_ID_ATA; |
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rc = do_probe(drive, cmd); |
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if (rc >= 2) { |
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/* look for ATAPI device */ |
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cmd = ATA_CMD_ID_ATAPI; |
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rc = do_probe(drive, cmd); |
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} |
|
|
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if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0) |
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return 0; |
|
|
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/* identification failed? */ |
|
if ((drive->dev_flags & IDE_DFLAG_ID_READ) == 0) { |
|
if (drive->media == ide_disk) { |
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printk(KERN_INFO "%s: non-IDE drive, CHS=%d/%d/%d\n", |
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drive->name, drive->cyl, |
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drive->head, drive->sect); |
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} else if (drive->media == ide_cdrom) { |
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printk(KERN_INFO "%s: ATAPI cdrom (?)\n", drive->name); |
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} else { |
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/* nuke it */ |
|
printk(KERN_WARNING "%s: Unknown device on bus refused identification. Ignoring.\n", drive->name); |
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drive->dev_flags &= ~IDE_DFLAG_PRESENT; |
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} |
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} else { |
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if (cmd == ATA_CMD_ID_ATAPI) |
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ide_classify_atapi_dev(drive); |
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else |
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ide_classify_ata_dev(drive); |
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} |
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} |
|
|
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if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0) |
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return 0; |
|
|
|
/* The drive wasn't being helpful. Add generic info only */ |
|
if ((drive->dev_flags & IDE_DFLAG_ID_READ) == 0) { |
|
generic_id(drive); |
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return 1; |
|
} |
|
|
|
if (drive->media == ide_disk) { |
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ide_disk_init_chs(drive); |
|
ide_disk_init_mult_count(drive); |
|
} |
|
|
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return 1; |
|
} |
|
|
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static void hwif_release_dev(struct device *dev) |
|
{ |
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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, "%s", hwif->name); |
|
dev_set_drvdata(&hwif->gendev, hwif); |
|
if (hwif->gendev.parent == NULL) |
|
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, "%s", 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) |
|
{ |
|
const struct ide_tp_ops *tp_ops = hwif->tp_ops; |
|
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)) { |
|
tp_ops->dev_select(drive); |
|
tp_ops->write_devctl(hwif, ATA_DEVCTL_OBS); |
|
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) |
|
tp_ops->dev_select(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 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); |
|
|
|
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; |
|
} |
|
|
|
/* |
|
* 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_present_dev(i, drive, hwif) { |
|
ide_check_nien_quirk_list(drive); |
|
|
|
if (port_ops && port_ops->quirkproc) |
|
port_ops->quirkproc(drive); |
|
} |
|
|
|
ide_port_for_each_present_dev(i, drive, hwif) { |
|
ide_set_max_pio(drive); |
|
|
|
drive->dev_flags |= IDE_DFLAG_NICE1; |
|
|
|
if (hwif->dma_ops) |
|
ide_set_dma(drive); |
|
} |
|
} |
|
|
|
static void ide_initialize_rq(struct request *rq) |
|
{ |
|
struct ide_request *req = blk_mq_rq_to_pdu(rq); |
|
|
|
req->special = NULL; |
|
scsi_req_init(&req->sreq); |
|
req->sreq.sense = req->sense; |
|
} |
|
|
|
static const struct blk_mq_ops ide_mq_ops = { |
|
.queue_rq = ide_queue_rq, |
|
.initialize_rq_fn = ide_initialize_rq, |
|
}; |
|
|
|
/* |
|
* 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; |
|
struct blk_mq_tag_set *set; |
|
|
|
/* |
|
* 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. |
|
*/ |
|
|
|
set = &drive->tag_set; |
|
set->ops = &ide_mq_ops; |
|
set->nr_hw_queues = 1; |
|
set->queue_depth = 32; |
|
set->reserved_tags = 1; |
|
set->cmd_size = sizeof(struct ide_request); |
|
set->numa_node = hwif_to_node(hwif); |
|
set->flags = BLK_MQ_F_SHOULD_MERGE | BLK_MQ_F_BLOCKING; |
|
if (blk_mq_alloc_tag_set(set)) |
|
return 1; |
|
|
|
q = blk_mq_init_queue(set); |
|
if (IS_ERR(q)) { |
|
blk_mq_free_tag_set(set); |
|
return 1; |
|
} |
|
|
|
blk_queue_flag_set(QUEUE_FLAG_SCSI_PASSTHROUGH, q); |
|
|
|
q->queuedata = drive; |
|
blk_queue_segment_boundary(q, 0xffff); |
|
|
|
if (hwif->rqsize < max_sectors) |
|
max_sectors = hwif->rqsize; |
|
blk_queue_max_hw_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* |
|
*/ |
|
max_sg_entries >>= 1; |
|
#endif /* CONFIG_PCI */ |
|
|
|
blk_queue_max_segments(q, max_sg_entries); |
|
|
|
/* assign drive queue */ |
|
drive->queue = q; |
|
|
|
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_present_dev(i, drive, hwif) { |
|
if (ide_init_queue(drive)) { |
|
printk(KERN_ERR "ide: failed to init %s\n", |
|
drive->name); |
|
drive->dev_flags &= ~IDE_DFLAG_PRESENT; |
|
continue; |
|
} |
|
|
|
j++; |
|
} |
|
mutex_unlock(&ide_cfg_mtx); |
|
|
|
return j; |
|
} |
|
|
|
static void ide_host_enable_irqs(struct ide_host *host) |
|
{ |
|
ide_hwif_t *hwif; |
|
int i; |
|
|
|
ide_host_for_each_port(i, hwif, host) { |
|
if (hwif == NULL) |
|
continue; |
|
|
|
/* clear any pending IRQs */ |
|
hwif->tp_ops->read_status(hwif); |
|
|
|
/* unmask IRQs */ |
|
if (hwif->io_ports.ctl_addr) |
|
hwif->tp_ops->write_devctl(hwif, ATA_DEVCTL_OBS); |
|
} |
|
} |
|
|
|
/* |
|
* 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; |
|
struct ide_host *host = hwif->host; |
|
irq_handler_t irq_handler = host->irq_handler; |
|
int sa = host->irq_flags; |
|
|
|
if (irq_handler == NULL) |
|
irq_handler = ide_intr; |
|
|
|
if (!host->get_lock) |
|
if (request_irq(hwif->irq, irq_handler, sa, hwif->name, hwif)) |
|
goto out_up; |
|
|
|
#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"); |
|
|
|
return 0; |
|
out_up: |
|
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_and_module(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_proc_unregister_device(drive); |
|
|
|
if (drive->sense_rq) |
|
blk_mq_free_request(drive->sense_rq); |
|
|
|
blk_cleanup_queue(drive->queue); |
|
drive->queue = NULL; |
|
blk_mq_free_tag_set(&drive->tag_set); |
|
|
|
drive->dev_flags &= ~IDE_DFLAG_PRESENT; |
|
|
|
complete(&drive->gendev_rel_comp); |
|
} |
|
|
|
static int hwif_init(ide_hwif_t *hwif) |
|
{ |
|
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_array(hwif->sg_max_nents, |
|
sizeof(struct scatterlist), |
|
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)) { |
|
printk(KERN_ERR "%s: disabled, unable to get IRQ %d\n", |
|
hwif->name, hwif->irq); |
|
goto out; |
|
} |
|
|
|
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_present_dev(i, drive, hwif) { |
|
struct device *dev = &drive->gendev; |
|
int ret; |
|
|
|
dev_set_name(dev, "%u.%u", hwif->index, i); |
|
dev_set_drvdata(dev, drive); |
|
dev->parent = &hwif->gendev; |
|
dev->bus = &ide_bus_type; |
|
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_NO_IO_32BIT) |
|
drive->dev_flags |= IDE_DFLAG_NO_IO_32BIT; |
|
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; |
|
|
|
drive->pio_mode = XFER_PIO_0; |
|
|
|
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; |
|
|
|
hwif->chipset = d->chipset ? d->chipset : ide_pci; |
|
|
|
if (d->init_iops) |
|
d->init_iops(hwif); |
|
|
|
/* ->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->host_flags & IDE_HFLAG_DTC2278) == 0 || 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; |
|
|
|
hwif->dma_ops = d->dma_ops; |
|
|
|
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_ops = NULL; |
|
hwif->dma_base = 0; |
|
hwif->swdma_mask = 0; |
|
hwif->mwdma_mask = 0; |
|
hwif->ultra_mask = 0; |
|
} |
|
} |
|
|
|
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; |
|
else { |
|
if ((hwif->host_flags & IDE_HFLAG_NO_LBA48) || |
|
(hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA)) |
|
hwif->rqsize = 256; |
|
else |
|
hwif->rqsize = 65536; |
|
} |
|
|
|
/* 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); |
|
} |
|
} |
|
|
|
/* |
|
* Deferred request list insertion handler |
|
*/ |
|
static void drive_rq_insert_work(struct work_struct *work) |
|
{ |
|
ide_drive_t *drive = container_of(work, ide_drive_t, rq_work); |
|
ide_hwif_t *hwif = drive->hwif; |
|
struct request *rq; |
|
blk_status_t ret; |
|
LIST_HEAD(list); |
|
|
|
blk_mq_quiesce_queue(drive->queue); |
|
|
|
ret = BLK_STS_OK; |
|
spin_lock_irq(&hwif->lock); |
|
while (!list_empty(&drive->rq_list)) { |
|
rq = list_first_entry(&drive->rq_list, struct request, queuelist); |
|
list_del_init(&rq->queuelist); |
|
|
|
spin_unlock_irq(&hwif->lock); |
|
ret = ide_issue_rq(drive, rq, true); |
|
spin_lock_irq(&hwif->lock); |
|
} |
|
spin_unlock_irq(&hwif->lock); |
|
|
|
blk_mq_unquiesce_queue(drive->queue); |
|
|
|
if (ret != BLK_STS_OK) |
|
kblockd_schedule_work(&drive->rq_work); |
|
} |
|
|
|
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; |
|
u16 *saved_id = drive->id; |
|
|
|
memset(drive, 0, sizeof(*drive)); |
|
memset(saved_id, 0, SECTOR_SIZE); |
|
drive->id = saved_id; |
|
|
|
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_flags = IDE_SFLAG_RECALIBRATE | |
|
IDE_SFLAG_SET_GEOMETRY; |
|
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); |
|
|
|
INIT_WORK(&drive->rq_work, drive_rq_insert_work); |
|
INIT_LIST_HEAD(&drive->rq_list); |
|
} |
|
} |
|
|
|
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; |
|
|
|
spin_lock_init(&hwif->lock); |
|
|
|
timer_setup(&hwif->timer, ide_timer_expiry, 0); |
|
|
|
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, struct ide_hw *hw) |
|
{ |
|
memcpy(&hwif->io_ports, &hw->io_ports, sizeof(hwif->io_ports)); |
|
hwif->irq = hw->irq; |
|
hwif->dev = hw->dev; |
|
hwif->gendev.parent = hw->parent ? hw->parent : hw->dev; |
|
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->id); |
|
kfree(drive); |
|
} |
|
} |
|
|
|
static int ide_port_alloc_devices(ide_hwif_t *hwif, int node) |
|
{ |
|
ide_drive_t *drive; |
|
int i; |
|
|
|
for (i = 0; i < MAX_DRIVES; i++) { |
|
drive = kzalloc_node(sizeof(*drive), GFP_KERNEL, node); |
|
if (drive == NULL) |
|
goto out_nomem; |
|
|
|
/* |
|
* In order to keep things simple we have an id |
|
* block for all drives at all times. If the device |
|
* is pre ATA or refuses ATA/ATAPI identify we |
|
* will add faked data to this. |
|
* |
|
* Also note that 0 everywhere means "can't do X" |
|
*/ |
|
drive->id = kzalloc_node(SECTOR_SIZE, GFP_KERNEL, node); |
|
if (drive->id == NULL) |
|
goto out_free_drive; |
|
|
|
hwif->devices[i] = drive; |
|
} |
|
return 0; |
|
|
|
out_free_drive: |
|
kfree(drive); |
|
out_nomem: |
|
ide_port_free_devices(hwif); |
|
return -ENOMEM; |
|
} |
|
|
|
struct ide_host *ide_host_alloc(const struct ide_port_info *d, |
|
struct ide_hw **hws, unsigned int n_ports) |
|
{ |
|
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 < n_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"); |
|
ide_port_free_devices(hwif); |
|
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->get_lock = d->get_lock; |
|
host->release_lock = d->release_lock; |
|
host->host_flags = d->host_flags; |
|
host->irq_flags = d->irq_flags; |
|
} |
|
|
|
return host; |
|
} |
|
EXPORT_SYMBOL_GPL(ide_host_alloc); |
|
|
|
static void ide_port_free(ide_hwif_t *hwif) |
|
{ |
|
ide_port_free_devices(hwif); |
|
ide_free_port_slot(hwif->index); |
|
kfree(hwif); |
|
} |
|
|
|
static void ide_disable_port(ide_hwif_t *hwif) |
|
{ |
|
struct ide_host *host = hwif->host; |
|
int i; |
|
|
|
printk(KERN_INFO "%s: disabling port\n", hwif->name); |
|
|
|
for (i = 0; i < MAX_HOST_PORTS; i++) { |
|
if (host->ports[i] == hwif) { |
|
host->ports[i] = NULL; |
|
host->n_ports--; |
|
} |
|
} |
|
|
|
ide_port_free(hwif); |
|
} |
|
|
|
int ide_host_register(struct ide_host *host, const struct ide_port_info *d, |
|
struct ide_hw **hws) |
|
{ |
|
ide_hwif_t *hwif, *mate = NULL; |
|
int i, j = 0; |
|
|
|
pr_warn("legacy IDE will be removed in 2021, please switch to libata\n" |
|
"Report any missing HW support to [email protected]\n"); |
|
|
|
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 ((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); |
|
|
|
hwif->port_flags |= IDE_PFLAG_PROBING; |
|
|
|
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; |
|
|
|
hwif->port_flags &= ~IDE_PFLAG_PROBING; |
|
|
|
if ((hwif->host_flags & IDE_HFLAG_4DRIVES) == 0 || |
|
hwif->mate == NULL || hwif->mate->present == 0) { |
|
if (ide_register_port(hwif)) { |
|
ide_disable_port(hwif); |
|
continue; |
|
} |
|
} |
|
|
|
if (hwif->present) |
|
ide_port_tune_devices(hwif); |
|
} |
|
|
|
ide_host_enable_irqs(host); |
|
|
|
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); |
|
device_unregister(hwif->portdev); |
|
device_unregister(&hwif->gendev); |
|
ide_disable_port(hwif); |
|
continue; |
|
} |
|
|
|
if (hwif->present) |
|
if (ide_port_setup_devices(hwif) == 0) { |
|
hwif->present = 0; |
|
continue; |
|
} |
|
|
|
j++; |
|
|
|
ide_acpi_init_port(hwif); |
|
|
|
if (hwif->present) |
|
ide_acpi_port_init_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); |
|
hwif_register_devices(hwif); |
|
} |
|
} |
|
|
|
return j ? 0 : -1; |
|
} |
|
EXPORT_SYMBOL_GPL(ide_host_register); |
|
|
|
int ide_host_add(const struct ide_port_info *d, struct ide_hw **hws, |
|
unsigned int n_ports, struct ide_host **hostp) |
|
{ |
|
struct ide_host *host; |
|
int rc; |
|
|
|
host = ide_host_alloc(d, hws, n_ports); |
|
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_present_dev(i, drive, hwif) { |
|
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); |
|
|
|
if (!hwif->host->get_lock) |
|
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) |
|
ide_port_free(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) |
|
{ |
|
int rc; |
|
|
|
ide_port_apply_params(hwif); |
|
ide_port_cable_detect(hwif); |
|
|
|
hwif->port_flags |= IDE_PFLAG_PROBING; |
|
|
|
ide_port_init_devices(hwif); |
|
|
|
rc = ide_probe_port(hwif); |
|
|
|
hwif->port_flags &= ~IDE_PFLAG_PROBING; |
|
|
|
if (rc < 0) |
|
return; |
|
|
|
hwif->present = 1; |
|
|
|
ide_port_tune_devices(hwif); |
|
ide_port_setup_devices(hwif); |
|
ide_acpi_port_init_devices(hwif); |
|
hwif_register_devices(hwif); |
|
ide_proc_port_register_devices(hwif); |
|
} |
|
EXPORT_SYMBOL_GPL(ide_port_scan);
|
|
|