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authorThomas Schwinge <tschwinge@gnu.org>2006-10-08 10:12:35 +0000
committerThomas Schwinge <tschwinge@gnu.org>2009-06-18 00:26:42 +0200
commit864d744d4754a602766d834fc12d336a8d9af236 (patch)
tree1cb8d09203de1987a056d01548d623f8774576b2 /linux/dev/drivers
parent846a52b57636580e3968616a6c6195cc595c24a0 (diff)
2006-10-08 Thomas Schwinge <tschwinge@gnu.org>
* linux/dev/drivers/block/ide.c: Move file... * linux/src/drivers/block/ide.c: ... here.
Diffstat (limited to 'linux/dev/drivers')
-rw-r--r--linux/dev/drivers/block/ide.c3839
1 files changed, 0 insertions, 3839 deletions
diff --git a/linux/dev/drivers/block/ide.c b/linux/dev/drivers/block/ide.c
deleted file mode 100644
index 5dcd0aa..0000000
--- a/linux/dev/drivers/block/ide.c
+++ /dev/null
@@ -1,3839 +0,0 @@
-/*
- * linux/drivers/block/ide.c Version 5.53 Jun 24, 1997
- *
- * Copyright (C) 1994-1996 Linus Torvalds & authors (see below)
- */
-#define _IDE_C /* needed by <linux/blk.h> */
-
-/*
- * Maintained by Mark Lord <mlord@pobox.com>
- * and Gadi Oxman <gadio@netvision.net.il>
- *
- * This is the multiple IDE interface driver, as evolved from hd.c.
- * It supports up to four IDE interfaces, on one or more IRQs (usually 14 & 15).
- * There can be up to two drives per interface, as per the ATA-2 spec.
- *
- * Primary: ide0, port 0x1f0; major=3; hda is minor=0; hdb is minor=64
- * Secondary: ide1, port 0x170; major=22; hdc is minor=0; hdd is minor=64
- * Tertiary: ide2, port 0x???; major=33; hde is minor=0; hdf is minor=64
- * Quaternary: ide3, port 0x???; major=34; hdg is minor=0; hdh is minor=64
- *
- * It is easy to extend ide.c to handle more than four interfaces:
- *
- * Change the MAX_HWIFS constant in ide.h.
- *
- * Define some new major numbers (in major.h), and insert them into
- * the ide_hwif_to_major table in ide.c.
- *
- * Fill in the extra values for the new interfaces into the two tables
- * inside ide.c: default_io_base[] and default_irqs[].
- *
- * Create the new request handlers by cloning "do_ide3_request()"
- * for each new interface, and add them to the switch statement
- * in the ide_init() function in ide.c.
- *
- * Recompile, create the new /dev/ entries, and it will probably work.
- *
- * From hd.c:
- * |
- * | It traverses the request-list, using interrupts to jump between functions.
- * | As nearly all functions can be called within interrupts, we may not sleep.
- * | Special care is recommended. Have Fun!
- * |
- * | modified by Drew Eckhardt to check nr of hd's from the CMOS.
- * |
- * | Thanks to Branko Lankester, lankeste@fwi.uva.nl, who found a bug
- * | in the early extended-partition checks and added DM partitions.
- * |
- * | Early work on error handling by Mika Liljeberg (liljeber@cs.Helsinki.FI).
- * |
- * | IRQ-unmask, drive-id, multiple-mode, support for ">16 heads",
- * | and general streamlining by Mark Lord (mlord@pobox.com).
- *
- * October, 1994 -- Complete line-by-line overhaul for linux 1.1.x, by:
- *
- * Mark Lord (mlord@pobox.com) (IDE Perf.Pkg)
- * Delman Lee (delman@mipg.upenn.edu) ("Mr. atdisk2")
- * Scott Snyder (snyder@fnald0.fnal.gov) (ATAPI IDE cd-rom)
- *
- * This was a rewrite of just about everything from hd.c, though some original
- * code is still sprinkled about. Think of it as a major evolution, with
- * inspiration from lots of linux users, esp. hamish@zot.apana.org.au
- *
- * Version 1.0 ALPHA initial code, primary i/f working okay
- * Version 1.3 BETA dual i/f on shared irq tested & working!
- * Version 1.4 BETA added auto probing for irq(s)
- * Version 1.5 BETA added ALPHA (untested) support for IDE cd-roms,
- * ...
- * Version 3.5 correct the bios_cyl field if it's too small
- * (linux 1.1.76) (to help fdisk with brain-dead BIOSs)
- * Version 3.6 cosmetic corrections to comments and stuff
- * (linux 1.1.77) reorganise probing code to make it understandable
- * added halfway retry to probing for drive identification
- * added "hdx=noprobe" command line option
- * allow setting multmode even when identification fails
- * Version 3.7 move set_geometry=1 from do_identify() to ide_init()
- * increase DRQ_WAIT to eliminate nuisance messages
- * wait for DRQ_STAT instead of DATA_READY during probing
- * (courtesy of Gary Thomas gary@efland.UU.NET)
- * Version 3.8 fixed byte-swapping for confused Mitsumi cdrom drives
- * update of ide-cd.c from Scott, allows blocksize=1024
- * cdrom probe fixes, inspired by jprang@uni-duisburg.de
- * Version 3.9 don't use LBA if lba_capacity looks funny
- * correct the drive capacity calculations
- * fix probing for old Seagates without IDE_ALTSTATUS_REG
- * fix byte-ordering for some NEC cdrom drives
- * Version 3.10 disable multiple mode by default; was causing trouble
- * Version 3.11 fix mis-identification of old WD disks as cdroms
- * Version 3,12 simplify logic for selecting initial mult_count
- * (fixes problems with buggy WD drives)
- * Version 3.13 remove excess "multiple mode disabled" messages
- * Version 3.14 fix ide_error() handling of BUSY_STAT
- * fix byte-swapped cdrom strings (again.. arghh!)
- * ignore INDEX bit when checking the ALTSTATUS reg
- * Version 3.15 add SINGLE_THREADED flag for use with dual-CMD i/f
- * ignore WRERR_STAT for non-write operations
- * added vlb_sync support for DC-2000A & others,
- * (incl. some Promise chips), courtesy of Frank Gockel
- * Version 3.16 convert vlb_32bit and vlb_sync into runtime flags
- * add ioctls to get/set VLB flags (HDIO_[SG]ET_CHIPSET)
- * rename SINGLE_THREADED to SUPPORT_SERIALIZE,
- * add boot flag to "serialize" operation for CMD i/f
- * add optional support for DTC2278 interfaces,
- * courtesy of andy@cercle.cts.com (Dyan Wile).
- * add boot flag to enable "dtc2278" probe
- * add probe to avoid EATA (SCSI) interfaces,
- * courtesy of neuffer@goofy.zdv.uni-mainz.de.
- * Version 4.00 tidy up verify_area() calls - heiko@colossus.escape.de
- * add flag to ignore WRERR_STAT for some drives
- * courtesy of David.H.West@um.cc.umich.edu
- * assembly syntax tweak to vlb_sync
- * removable drive support from scuba@cs.tu-berlin.de
- * add transparent support for DiskManager-6.0x "Dynamic
- * Disk Overlay" (DDO), most of this is in genhd.c
- * eliminate "multiple mode turned off" message at boot
- * Version 4.10 fix bug in ioctl for "hdparm -c3"
- * fix DM6:DDO support -- now works with LILO, fdisk, ...
- * don't treat some naughty WD drives as removable
- * Version 4.11 updated DM6 support using info provided by OnTrack
- * Version 5.00 major overhaul, multmode setting fixed, vlb_sync fixed
- * added support for 3rd/4th/alternative IDE ports
- * created ide.h; ide-cd.c now compiles separate from ide.c
- * hopefully fixed infinite "unexpected_intr" from cdroms
- * zillions of other changes and restructuring
- * somehow reduced overall memory usage by several kB
- * probably slowed things down slightly, but worth it
- * Version 5.01 AT LAST!! Finally understood why "unexpected_intr"
- * was happening at various times/places: whenever the
- * ide-interface's ctl_port was used to "mask" the irq,
- * it also would trigger an edge in the process of masking
- * which would result in a self-inflicted interrupt!!
- * (such a stupid way to build a hardware interrupt mask).
- * This is now fixed (after a year of head-scratching).
- * Version 5.02 got rid of need for {enable,disable}_irq_list()
- * Version 5.03 tune-ups, comments, remove "busy wait" from drive resets
- * removed PROBE_FOR_IRQS option -- no longer needed
- * OOOPS! fixed "bad access" bug for 2nd drive on an i/f
- * Version 5.04 changed "ira %d" to "irq %d" in DEBUG message
- * added more comments, cleaned up unexpected_intr()
- * OOOPS! fixed null pointer problem in ide reset code
- * added autodetect for Triton chipset -- no effect yet
- * Version 5.05 OOOPS! fixed bug in revalidate_disk()
- * OOOPS! fixed bug in ide_do_request()
- * added ATAPI reset sequence for cdroms
- * Version 5.10 added Bus-Mastered DMA support for Triton Chipset
- * some (mostly) cosmetic changes
- * Version 5.11 added ht6560b support by malafoss@snakemail.hut.fi
- * reworked PCI scanning code
- * added automatic RZ1000 detection/support
- * added automatic PCI CMD640 detection/support
- * added option for VLB CMD640 support
- * tweaked probe to find cdrom on hdb with disks on hda,hdc
- * Version 5.12 some performance tuning
- * added message to alert user to bad /dev/hd[cd] entries
- * OOOPS! fixed bug in atapi reset
- * driver now forces "serialize" again for all cmd640 chips
- * noticed REALLY_SLOW_IO had no effect, moved it to ide.c
- * made do_drive_cmd() into public ide_do_drive_cmd()
- * Version 5.13 fixed typo ('B'), thanks to houston@boyd.geog.mcgill.ca
- * fixed ht6560b support
- * Version 5.13b (sss) fix problem in calling ide_cdrom_setup()
- * don't bother invalidating nonexistent partitions
- * Version 5.14 fixes to cmd640 support.. maybe it works now(?)
- * added & tested full EZ-DRIVE support -- don't use LILO!
- * don't enable 2nd CMD640 PCI port during init - conflict
- * Version 5.15 bug fix in init_cmd640_vlb()
- * bug fix in interrupt sharing code
- * Version 5.16 ugh.. fix "serialize" support, broken in 5.15
- * remove "Huh?" from cmd640 code
- * added qd6580 interface speed select from Colten Edwards
- * Version 5.17 kludge around bug in BIOS32 on Intel triton motherboards
- * Version 5.18 new CMD640 code, moved to cmd640.c, #include'd for now
- * new UMC8672 code, moved to umc8672.c, #include'd for now
- * disallow turning on DMA when h/w not capable of DMA
- * Version 5.19 fix potential infinite timeout on resets
- * extend reset poll into a general purpose polling scheme
- * add atapi tape drive support from Gadi Oxman
- * simplify exit from _intr routines -- no IDE_DO_REQUEST
- * Version 5.20 leave current rq on blkdev request list during I/O
- * generalized ide_do_drive_cmd() for tape/cdrom driver use
- * Version 5.21 fix nasty cdrom/tape bug (ide_preempt was messed up)
- * Version 5.22 fix ide_xlate_1024() to work with/without drive->id
- * Version 5.23 miscellaneous touch-ups
- * Version 5.24 fix #if's for SUPPORT_CMD640
- * Version 5.25 more touch-ups, fix cdrom resets, ...
- * cmd640.c now configs/compiles separate from ide.c
- * Version 5.26 keep_settings now maintains the using_dma flag
- * fix [EZD] remap message to only output at boot time
- * fix "bad /dev/ entry" message to say hdc, not hdc0
- * fix ide_xlate_1024() to respect user specified CHS
- * use CHS from partn table if it looks translated
- * re-merged flags chipset,vlb_32bit,vlb_sync into io_32bit
- * keep track of interface chipset type, when known
- * add generic PIO mode "tuneproc" mechanism
- * fix cmd640_vlb option
- * fix ht6560b support (was completely broken)
- * umc8672.c now configures/compiles separate from ide.c
- * move dtc2278 support to dtc2278.c
- * move ht6560b support to ht6560b.c
- * move qd6580 support to qd6580.c
- * add ali14xx support in ali14xx.c
- * Version 5.27 add [no]autotune parameters to help cmd640
- * move rz1000 support to rz1000.c
- * Version 5.28 #include "ide_modes.h"
- * fix disallow_unmask: now per-interface "no_unmask" bit
- * force io_32bit to be the same on drive pairs of dtc2278
- * improved IDE tape error handling, and tape DMA support
- * bugfix in ide_do_drive_cmd() for cdroms + serialize
- * Version 5.29 fixed non-IDE check for too many physical heads
- * don't use LBA if capacity is smaller than CHS
- * Version 5.30 remove real_devices kludge, formerly used by genhd.c
- * Version 5.32 change "KB" to "kB"
- * fix serialize (was broken in kernel 1.3.72)
- * add support for "hdparm -I"
- * use common code for disk/tape/cdrom IDE_DRIVE_CMDs
- * add support for Promise DC4030VL caching card
- * improved serialize support
- * put partition check back into alphabetical order
- * add config option for PCMCIA baggage
- * try to make PCMCIA support safer to use
- * improve security on ioctls(): all are suser() only
- * Version 5.33 improve handling of HDIO_DRIVE_CMDs that read data
- * Version 5.34 fix irq-sharing problem from 5.33
- * fix cdrom ioctl problem from 5.33
- * Version 5.35 cosmetic changes
- * fix cli() problem in try_to_identify()
- * Version 5.36 fixes to optional PCMCIA support
- * Version 5.37 don't use DMA when "noautotune" is specified
- * Version 5.37a (go) fix shared irq probing (was broken in kernel 1.3.72)
- * call unplug_device() from ide_do_drive_cmd()
- * Version 5.38 add "hdx=none" option, courtesy of Joel Maslak
- * mask drive irq after use, if sharing with another hwif
- * add code to help debug weird cmd640 problems
- * Version 5.39 fix horrible error in earlier irq sharing "fix"
- * Version 5.40 fix serialization -- was broken in 5.39
- * help sharing by masking device irq after probing
- * Version 5.41 more fixes to irq sharing/serialize detection
- * disable io_32bit by default on drive reset
- * Version 5.42 simplify irq-masking after probe
- * fix NULL pointer deref in save_match()
- * Version 5.43 Ugh.. unexpected_intr is back: try to exterminate it
- * Version 5.44 Fix for "irq probe failed" on cmd640
- * change path on message regarding MAKEDEV.ide
- * add a throttle to the unexpected_intr() messages
- * Version 5.45 fix ugly parameter parsing bugs (thanks Derek)
- * include Gadi's magic fix for cmd640 unexpected_intr
- * include mc68000 patches from Geert Uytterhoeven
- * add Gadi's fix for PCMCIA cdroms
- * Version 5.46 remove the mc68000 #ifdefs for 2.0.x
- * Version 5.47 fix set_tune race condition
- * fix bug in earlier PCMCIA cdrom update
- * Version 5.48 if def'd, invoke CMD640_DUMP_REGS when irq probe fails
- * lengthen the do_reset1() pulse, for laptops
- * add idebus=xx parameter for cmd640 and ali chipsets
- * no_unmask flag now per-drive instead of per-hwif
- * fix tune_req so that it gets done immediately
- * fix missing restore_flags() in ide_ioctl
- * prevent use of io_32bit on cmd640 with no prefetch
- * Version 5.49 fix minor quirks in probing routines
- * Version 5.50 allow values as small as 20 for idebus=
- * Version 5.51 force non io_32bit in drive_cmd_intr()
- * change delay_10ms() to delay_50ms() to fix problems
- * Version 5.52 fix incorrect invalidation of removable devices
- * add "hdx=slow" command line option
- * Version 5.53 add ATAPI floppy drive support
- * change default media for type 0 to floppy
- * add support for Exabyte Nest
- * add missing set_blocksize() in revalidate_disk()
- * handle bad status bit sequencing in ide_wait_stat()
- * support partition table translations with 255 heads
- * probe all interfaces by default
- * add probe for the i82371AB chipset
- * acknowledge media change on removable drives
- * add work-around for BMI drives
- * remove "LBA" from boot messages
- * Version 5.53.1 add UDMA "CRC retry" support
- * Version 5.53.2 add Promise/33 auto-detection and DMA support
- * fix MC_ERR handling
- * fix mis-detection of NEC cdrom as floppy
- * issue ATAPI reset and re-probe after "no response"
- *
- * Some additional driver compile-time options are in ide.h
- *
- * To do, in likely order of completion:
- * - modify kernel to obtain BIOS geometry for drives on 2nd/3rd/4th i/f
-*/
-
-#undef REALLY_SLOW_IO /* most systems can safely undef this */
-
-#include <linux/config.h>
-#include <linux/types.h>
-#include <linux/string.h>
-#include <linux/kernel.h>
-#include <linux/delay.h>
-#include <linux/timer.h>
-#include <linux/mm.h>
-#include <linux/ioport.h>
-#include <linux/interrupt.h>
-#include <linux/major.h>
-#include <linux/blkdev.h>
-#include <linux/errno.h>
-#include <linux/hdreg.h>
-#include <linux/genhd.h>
-#include <linux/malloc.h>
-
-#include <asm/byteorder.h>
-#include <asm/irq.h>
-#include <asm/segment.h>
-#include <asm/io.h>
-
-#ifdef CONFIG_PCI
-#include <linux/bios32.h>
-#include <linux/pci.h>
-#endif /* CONFIG_PCI */
-
-#include "ide.h"
-#include "ide_modes.h"
-
-#ifdef CONFIG_BLK_DEV_PROMISE
-#include "promise.h"
-#define IS_PROMISE_DRIVE (HWIF(drive)->chipset == ide_promise)
-#else
-#define IS_PROMISE_DRIVE (0) /* auto-NULLs out Promise code */
-#endif /* CONFIG_BLK_DEV_PROMISE */
-
-static const byte ide_hwif_to_major[MAX_HWIFS] = {IDE0_MAJOR, IDE1_MAJOR, IDE2_MAJOR, IDE3_MAJOR};
-static const unsigned short default_io_base[MAX_HWIFS] = {0x1f0, 0x170, 0x1e8, 0x168};
-static const byte default_irqs[MAX_HWIFS] = {14, 15, 11, 10};
-static int idebus_parameter; /* holds the "idebus=" parameter */
-static int system_bus_speed; /* holds what we think is VESA/PCI bus speed */
-
-/*
- * This is declared extern in ide.h, for access by other IDE modules:
- */
-ide_hwif_t ide_hwifs[MAX_HWIFS]; /* master data repository */
-
-#if (DISK_RECOVERY_TIME > 0)
-/*
- * For really screwy hardware (hey, at least it *can* be used with Linux)
- * we can enforce a minimum delay time between successive operations.
- */
-static unsigned long read_timer(void)
-{
- unsigned long t, flags;
- int i;
-
- save_flags(flags);
- cli();
- t = jiffies * 11932;
- outb_p(0, 0x43);
- i = inb_p(0x40);
- i |= inb(0x40) << 8;
- restore_flags(flags);
- return (t - i);
-}
-
-static void set_recovery_timer (ide_hwif_t *hwif)
-{
- hwif->last_time = read_timer();
-}
-#define SET_RECOVERY_TIMER(drive) set_recovery_timer (drive)
-
-#else
-
-#define SET_RECOVERY_TIMER(drive)
-
-#endif /* DISK_RECOVERY_TIME */
-
-
-/*
- * Do not even *think* about calling this!
- */
-static void init_hwif_data (unsigned int index)
-{
- byte *p;
- unsigned int unit;
- ide_hwif_t *hwif = &ide_hwifs[index];
-
- /* bulk initialize hwif & drive info with zeros */
- p = ((byte *) hwif) + sizeof(ide_hwif_t);
- do {
- *--p = 0;
- } while (p > (byte *) hwif);
-
- /* fill in any non-zero initial values */
- hwif->index = index;
- hwif->io_base = default_io_base[index];
- hwif->ctl_port = hwif->io_base ? hwif->io_base+0x206 : 0x000;
-#ifdef CONFIG_BLK_DEV_HD
- if (hwif->io_base == HD_DATA)
- hwif->noprobe = 1; /* may be overridden by ide_setup() */
-#endif /* CONFIG_BLK_DEV_HD */
- hwif->major = ide_hwif_to_major[index];
- hwif->name[0] = 'i';
- hwif->name[1] = 'd';
- hwif->name[2] = 'e';
- hwif->name[3] = '0' + index;
-#ifdef CONFIG_BLK_DEV_IDETAPE
- hwif->tape_drive = NULL;
-#endif /* CONFIG_BLK_DEV_IDETAPE */
- for (unit = 0; unit < MAX_DRIVES; ++unit) {
- ide_drive_t *drive = &hwif->drives[unit];
-
- drive->select.all = (unit<<4)|0xa0;
- drive->hwif = hwif;
- drive->ctl = 0x08;
- drive->ready_stat = READY_STAT;
- drive->bad_wstat = BAD_W_STAT;
- drive->special.b.recalibrate = 1;
- drive->special.b.set_geometry = 1;
- drive->name[0] = 'h';
- drive->name[1] = 'd';
-#ifdef MACH
- drive->name[2] = '0' + (index * MAX_DRIVES) + unit;
-#else
- drive->name[2] = 'a' + (index * MAX_DRIVES) + unit;
-#endif
- }
-}
-
-/*
- * init_ide_data() sets reasonable default values into all fields
- * of all instances of the hwifs and drives, but only on the first call.
- * Subsequent calls have no effect (they don't wipe out anything).
- *
- * This routine is normally called at driver initialization time,
- * but may also be called MUCH earlier during kernel "command-line"
- * parameter processing. As such, we cannot depend on any other parts
- * of the kernel (such as memory allocation) to be functioning yet.
- *
- * This is too bad, as otherwise we could dynamically allocate the
- * ide_drive_t structs as needed, rather than always consuming memory
- * for the max possible number (MAX_HWIFS * MAX_DRIVES) of them.
- */
-#define MAGIC_COOKIE 0x12345678
-static void init_ide_data (void)
-{
- unsigned int index;
- static unsigned long magic_cookie = MAGIC_COOKIE;
-
- if (magic_cookie != MAGIC_COOKIE)
- return; /* already initialized */
- magic_cookie = 0;
-
- for (index = 0; index < MAX_HWIFS; ++index)
- init_hwif_data(index);
-
- idebus_parameter = 0;
- system_bus_speed = 0;
-}
-
-/*
- * ide_system_bus_speed() returns what we think is the system VESA/PCI
- * bus speed (in Mhz). This is used for calculating interface PIO timings.
- * The default is 40 for known PCI systems, 50 otherwise.
- * The "idebus=xx" parameter can be used to override this value.
- * The actual value to be used is computed/displayed the first time through.
- */
-int ide_system_bus_speed (void)
-{
- if (!system_bus_speed) {
- if (idebus_parameter)
- system_bus_speed = idebus_parameter; /* user supplied value */
-#ifdef CONFIG_PCI
- else if (pcibios_present())
- system_bus_speed = 40; /* safe default value for PCI */
-#endif /* CONFIG_PCI */
- else
- system_bus_speed = 50; /* safe default value for VESA and PCI */
- printk("ide: Assuming %dMhz system bus speed for PIO modes; override with idebus=xx\n", system_bus_speed);
- }
- return system_bus_speed;
-}
-
-#if SUPPORT_VLB_SYNC
-/*
- * Some localbus EIDE interfaces require a special access sequence
- * when using 32-bit I/O instructions to transfer data. We call this
- * the "vlb_sync" sequence, which consists of three successive reads
- * of the sector count register location, with interrupts disabled
- * to ensure that the reads all happen together.
- */
-static inline void do_vlb_sync (unsigned short port) {
- (void) inb (port);
- (void) inb (port);
- (void) inb (port);
-}
-#endif /* SUPPORT_VLB_SYNC */
-
-/*
- * This is used for most PIO data transfers *from* the IDE interface
- */
-void ide_input_data (ide_drive_t *drive, void *buffer, unsigned int wcount)
-{
- unsigned short io_base = HWIF(drive)->io_base;
- unsigned short data_reg = io_base+IDE_DATA_OFFSET;
- byte io_32bit = drive->io_32bit;
-
- if (io_32bit) {
-#if SUPPORT_VLB_SYNC
- if (io_32bit & 2) {
- cli();
- do_vlb_sync(io_base+IDE_NSECTOR_OFFSET);
- insl(data_reg, buffer, wcount);
- if (drive->unmask)
- sti();
- } else
-#endif /* SUPPORT_VLB_SYNC */
- insl(data_reg, buffer, wcount);
- } else {
-#if SUPPORT_SLOW_DATA_PORTS
- if (drive->slow) {
- unsigned short *ptr = (unsigned short *) buffer;
- while (wcount--) {
- *ptr++ = inw_p(data_reg);
- *ptr++ = inw_p(data_reg);
- }
- } else
-#endif /* SUPPORT_SLOW_DATA_PORTS */
- insw(data_reg, buffer, wcount<<1);
- }
-}
-
-/*
- * This is used for most PIO data transfers *to* the IDE interface
- */
-void ide_output_data (ide_drive_t *drive, void *buffer, unsigned int wcount)
-{
- unsigned short io_base = HWIF(drive)->io_base;
- unsigned short data_reg = io_base+IDE_DATA_OFFSET;
- byte io_32bit = drive->io_32bit;
-
- if (io_32bit) {
-#if SUPPORT_VLB_SYNC
- if (io_32bit & 2) {
- cli();
- do_vlb_sync(io_base+IDE_NSECTOR_OFFSET);
- outsl(data_reg, buffer, wcount);
- if (drive->unmask)
- sti();
- } else
-#endif /* SUPPORT_VLB_SYNC */
- outsl(data_reg, buffer, wcount);
- } else {
-#if SUPPORT_SLOW_DATA_PORTS
- if (drive->slow) {
- unsigned short *ptr = (unsigned short *) buffer;
- while (wcount--) {
- outw_p(*ptr++, data_reg);
- outw_p(*ptr++, data_reg);
- }
- } else
-#endif /* SUPPORT_SLOW_DATA_PORTS */
- outsw(data_reg, buffer, wcount<<1);
- }
-}
-
-/*
- * The following routines are mainly used by the ATAPI drivers.
- *
- * These routines will round up any request for an odd number of bytes,
- * so if an odd bytecount is specified, be sure that there's at least one
- * extra byte allocated for the buffer.
- */
-void atapi_input_bytes (ide_drive_t *drive, void *buffer, unsigned int bytecount)
-{
- ++bytecount;
- ide_input_data (drive, buffer, bytecount / 4);
- if ((bytecount & 0x03) >= 2)
- insw (IDE_DATA_REG, ((byte *)buffer) + (bytecount & ~0x03), 1);
-}
-
-void atapi_output_bytes (ide_drive_t *drive, void *buffer, unsigned int bytecount)
-{
- ++bytecount;
- ide_output_data (drive, buffer, bytecount / 4);
- if ((bytecount & 0x03) >= 2)
- outsw (IDE_DATA_REG, ((byte *)buffer) + (bytecount & ~0x03), 1);
-}
-
-/*
- * This should get invoked any time we exit the driver to
- * wait for an interrupt response from a drive. handler() points
- * at the appropriate code to handle the next interrupt, and a
- * timer is started to prevent us from waiting forever in case
- * something goes wrong (see the timer_expiry() handler later on).
- */
-void ide_set_handler (ide_drive_t *drive, ide_handler_t *handler, unsigned int timeout)
-{
- ide_hwgroup_t *hwgroup = HWGROUP(drive);
-#ifdef DEBUG
- if (hwgroup->handler != NULL) {
- printk("%s: ide_set_handler: handler not null; old=%p, new=%p\n",
- drive->name, hwgroup->handler, handler);
- }
-#endif
- hwgroup->handler = handler;
- hwgroup->timer.expires = jiffies + timeout;
- add_timer(&(hwgroup->timer));
-}
-
-/*
- * lba_capacity_is_ok() performs a sanity check on the claimed "lba_capacity"
- * value for this drive (from its reported identification information).
- *
- * Returns: 1 if lba_capacity looks sensible
- * 0 otherwise
- */
-static int lba_capacity_is_ok (struct hd_driveid *id)
-{
- unsigned long lba_sects = id->lba_capacity;
- unsigned long chs_sects = id->cyls * id->heads * id->sectors;
- unsigned long _10_percent = chs_sects / 10;
-
- /* very large drives (8GB+) may lie about the number of cylinders */
- if (id->cyls == 16383 && id->heads == 16 && id->sectors == 63 && lba_sects > chs_sects) {
- return 1; /* lba_capacity is our only option */
- }
- /* perform a rough sanity check on lba_sects: within 10% is "okay" */
- if ((lba_sects - chs_sects) < _10_percent)
- return 1; /* lba_capacity is good */
-
- /* some drives have the word order reversed */
- lba_sects = (lba_sects << 16) | (lba_sects >> 16);
- if ((lba_sects - chs_sects) < _10_percent) {
- id->lba_capacity = lba_sects; /* fix it */
- return 1; /* lba_capacity is (now) good */
- }
- return 0; /* lba_capacity value is bad */
-}
-
-/*
- * current_capacity() returns the capacity (in sectors) of a drive
- * according to its current geometry/LBA settings.
- */
-static unsigned long current_capacity (ide_drive_t *drive)
-{
- struct hd_driveid *id = drive->id;
- unsigned long capacity = drive->cyl * drive->head * drive->sect;
-
- if (!drive->present)
- return 0;
-#ifdef CONFIG_BLK_DEV_IDEFLOPPY
- if (drive->media == ide_floppy)
- return idefloppy_capacity(drive);
-#endif /* CONFIG_BLK_DEV_IDEFLOPPY */
- if (drive->media != ide_disk)
- return 0x7fffffff; /* cdrom or tape */
- drive->select.b.lba = 0;
- /* Determine capacity, and use LBA if the drive properly supports it */
- if (id != NULL && (id->capability & 2) && lba_capacity_is_ok(id)) {
- if (id->lba_capacity >= capacity) {
- capacity = id->lba_capacity;
- drive->select.b.lba = 1;
- }
- }
- return (capacity - drive->sect0);
-}
-
-/*
- * ide_geninit() is called exactly *once* for each major, from genhd.c,
- * at the beginning of the initial partition check for the drives.
- */
-static void ide_geninit (struct gendisk *gd)
-{
- unsigned int unit;
- ide_hwif_t *hwif = gd->real_devices;
-
- for (unit = 0; unit < gd->nr_real; ++unit) {
- ide_drive_t *drive = &hwif->drives[unit];
-#ifdef CONFIG_BLK_DEV_IDECD
- if (drive->present && drive->media == ide_cdrom)
- ide_cdrom_setup(drive);
-#endif /* CONFIG_BLK_DEV_IDECD */
-#ifdef CONFIG_BLK_DEV_IDETAPE
- if (drive->present && drive->media == ide_tape)
- idetape_setup(drive);
-#endif /* CONFIG_BLK_DEV_IDETAPE */
-#ifdef CONFIG_BLK_DEV_IDEFLOPPY
- if (drive->present && drive->media == ide_floppy)
- idefloppy_setup(drive);
-#endif /* CONFIG_BLK_DEV_IDEFLOPPY */
- drive->part[0].nr_sects = current_capacity(drive);
- if (!drive->present || (drive->media != ide_disk && drive->media != ide_floppy) ||
- !drive->part[0].nr_sects) {
- drive->part[0].start_sect = -1; /* skip partition check */
- }
- }
-}
-
-/*
- * init_gendisk() (as opposed to ide_geninit) is called for each major device,
- * after probing for drives, to allocate partition tables and other data
- * structures needed for the routines in genhd.c. ide_geninit() gets called
- * somewhat later, during the partition check.
- */
-static void init_gendisk (ide_hwif_t *hwif)
-{
- struct gendisk *gd, **gdp;
- unsigned int unit, units, minors;
- int *bs;
-
- /* 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);
-
- 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;
- for (unit = 0; unit < minors; ++unit)
- *bs++ = BLOCK_SIZE;
-
- 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->max_nr = units; /* max num real drives */
- gd->nr_real = units; /* current num real drives */
- gd->init = ide_geninit; /* initialization function */
- gd->real_devices= hwif; /* ptr to internal data */
- gd->next = NULL; /* linked list of major devs */
-
- for (gdp = &gendisk_head; *gdp; gdp = &((*gdp)->next)) ;
- hwif->gd = *gdp = gd; /* link onto tail of list */
-}
-
-static void do_reset1 (ide_drive_t *, int); /* needed below */
-
-#ifdef CONFIG_BLK_DEV_IDEATAPI
-/*
- * atapi_reset_pollfunc() gets invoked to poll the interface for completion every 50ms
- * during an atapi drive reset operation. If the drive has not yet responded,
- * and we have not yet hit our maximum waiting time, then the timer is restarted
- * for another 50ms.
- */
-static void atapi_reset_pollfunc (ide_drive_t *drive)
-{
- ide_hwgroup_t *hwgroup = HWGROUP(drive);
- byte stat;
-
- OUT_BYTE (drive->select.all, IDE_SELECT_REG);
- udelay (10);
-
- if (OK_STAT(stat=GET_STAT(), 0, BUSY_STAT)) {
- printk("%s: ATAPI reset complete\n", drive->name);
- } else {
- if (jiffies < hwgroup->poll_timeout) {
- ide_set_handler (drive, &atapi_reset_pollfunc, HZ/20);
- return; /* continue polling */
- }
- hwgroup->poll_timeout = 0; /* end of polling */
- printk("%s: ATAPI reset timed-out, status=0x%02x\n", drive->name, stat);
- do_reset1 (drive, 1); /* do it the old fashioned way */
- return;
- }
- hwgroup->poll_timeout = 0; /* done polling */
-}
-#endif /* CONFIG_BLK_DEV_IDEATAPI */
-
-/*
- * reset_pollfunc() gets invoked to poll the interface for completion every 50ms
- * during an ide reset operation. If the drives have not yet responded,
- * and we have not yet hit our maximum waiting time, then the timer is restarted
- * for another 50ms.
- */
-static void reset_pollfunc (ide_drive_t *drive)
-{
- ide_hwgroup_t *hwgroup = HWGROUP(drive);
- ide_hwif_t *hwif = HWIF(drive);
- byte tmp;
-
- if (!OK_STAT(tmp=GET_STAT(), 0, BUSY_STAT)) {
- if (jiffies < hwgroup->poll_timeout) {
- ide_set_handler (drive, &reset_pollfunc, HZ/20);
- return; /* continue polling */
- }
- printk("%s: reset timed-out, status=0x%02x\n", hwif->name, tmp);
- } else {
- printk("%s: reset: ", hwif->name);
- if ((tmp = GET_ERR()) == 1)
- printk("success\n");
- else {
-#if FANCY_STATUS_DUMPS
- printk("master: ");
- switch (tmp & 0x7f) {
- case 1: printk("passed");
- break;
- case 2: printk("formatter device error");
- break;
- case 3: printk("sector buffer error");
- break;
- case 4: printk("ECC circuitry error");
- break;
- case 5: printk("controlling MPU error");
- break;
- default:printk("error (0x%02x?)", tmp);
- }
- if (tmp & 0x80)
- printk("; slave: failed");
- printk("\n");
-#else
- printk("failed\n");
-#endif /* FANCY_STATUS_DUMPS */
- }
- }
- hwgroup->poll_timeout = 0; /* done polling */
-}
-
-/*
- * do_reset1() attempts to recover a confused drive by resetting it.
- * Unfortunately, resetting a disk drive actually resets all devices on
- * the same interface, so it can really be thought of as resetting the
- * interface rather than resetting the drive.
- *
- * ATAPI devices have their own reset mechanism which allows them to be
- * individually reset without clobbering other devices on the same interface.
- *
- * Unfortunately, the IDE interface does not generate an interrupt to let
- * us know when the reset operation has finished, so we must poll for this.
- * Equally poor, though, is the fact that this may a very long time to complete,
- * (up to 30 seconds worstcase). So, instead of busy-waiting here for it,
- * we set a timer to poll at 50ms intervals.
- */
-static void do_reset1 (ide_drive_t *drive, int do_not_try_atapi)
-{
- unsigned int unit;
- unsigned long flags;
- ide_hwif_t *hwif = HWIF(drive);
- ide_hwgroup_t *hwgroup = HWGROUP(drive);
-
- save_flags(flags);
- cli(); /* Why ? */
-
-#ifdef CONFIG_BLK_DEV_IDEATAPI
- /* For an ATAPI device, first try an ATAPI SRST. */
- if (drive->media != ide_disk) {
- if (!do_not_try_atapi) {
- if (!drive->keep_settings) {
- drive->unmask = 0;
- drive->io_32bit = 0;
- }
- OUT_BYTE (drive->select.all, IDE_SELECT_REG);
- udelay (20);
- OUT_BYTE (WIN_SRST, IDE_COMMAND_REG);
- hwgroup->poll_timeout = jiffies + WAIT_WORSTCASE;
- ide_set_handler (drive, &atapi_reset_pollfunc, HZ/20);
- restore_flags (flags);
- return;
- }
- }
-#endif /* CONFIG_BLK_DEV_IDEATAPI */
-
- /*
- * First, reset any device state data we were maintaining
- * for any of the drives on this interface.
- */
- for (unit = 0; unit < MAX_DRIVES; ++unit) {
- ide_drive_t *rdrive = &hwif->drives[unit];
-#ifdef CONFIG_BLK_DEV_IDETAPE
- if (rdrive->media == ide_tape)
- rdrive->tape.reset_issued = 1;
-#endif /* CONFIG_BLK_DEV_IDETAPE */
- rdrive->special.all = 0;
- rdrive->special.b.set_geometry = 1;
- rdrive->special.b.recalibrate = 1;
- if (OK_TO_RESET_CONTROLLER)
- rdrive->mult_count = 0;
- if (!rdrive->keep_settings) {
- rdrive->mult_req = 0;
- rdrive->unmask = 0;
- rdrive->io_32bit = 0;
- if (rdrive->using_dma) {
- rdrive->using_dma = 0;
- printk("%s: disabled DMA\n", rdrive->name);
- }
- }
- if (rdrive->mult_req != rdrive->mult_count)
- rdrive->special.b.set_multmode = 1;
- }
-
-#if OK_TO_RESET_CONTROLLER
- /*
- * Note that we also set nIEN while resetting the device,
- * to mask unwanted interrupts from the interface during the reset.
- * However, due to the design of PC hardware, this will cause an
- * immediate interrupt due to the edge transition it produces.
- * This single interrupt gives us a "fast poll" for drives that
- * recover from reset very quickly, saving us the first 50ms wait time.
- */
- OUT_BYTE(drive->ctl|6,IDE_CONTROL_REG); /* set SRST and nIEN */
- udelay(10); /* more than enough time */
- OUT_BYTE(drive->ctl|2,IDE_CONTROL_REG); /* clear SRST, leave nIEN */
- udelay(10); /* more than enough time */
- hwgroup->poll_timeout = jiffies + WAIT_WORSTCASE;
- ide_set_handler (drive, &reset_pollfunc, HZ/20);
-#endif /* OK_TO_RESET_CONTROLLER */
-
- restore_flags (flags);
-}
-
-/*
- * ide_do_reset() is the entry point to the drive/interface reset code.
- */
-void ide_do_reset (ide_drive_t *drive)
-{
- do_reset1 (drive, 0);
-#ifdef CONFIG_BLK_DEV_IDETAPE
- if (drive->media == ide_tape)
- drive->tape.reset_issued=1;
-#endif /* CONFIG_BLK_DEV_IDETAPE */
-}
-
-/*
- * Clean up after success/failure of an explicit drive cmd
- */
-void ide_end_drive_cmd (ide_drive_t *drive, byte stat, byte err)
-{
- unsigned long flags;
- struct request *rq = HWGROUP(drive)->rq;
-
- if (rq->cmd == IDE_DRIVE_CMD) {
- byte *args = (byte *) rq->buffer;
- rq->errors = !OK_STAT(stat,READY_STAT,BAD_STAT);
- if (args) {
- args[0] = stat;
- args[1] = err;
- args[2] = IN_BYTE(IDE_NSECTOR_REG);
- }
- }
- save_flags(flags);
- cli();
- blk_dev[MAJOR(rq->rq_dev)].current_request = rq->next;
- HWGROUP(drive)->rq = NULL;
- rq->rq_status = RQ_INACTIVE;
- if (rq->sem != NULL)
- up(rq->sem);
- restore_flags(flags);
-}
-
-/*
- * Error reporting, in human readable form (luxurious, but a memory hog).
- */
-byte ide_dump_status (ide_drive_t *drive, const char *msg, byte stat)
-{
- unsigned long flags;
- byte err = 0;
-
- save_flags (flags);
- sti();
- printk("%s: %s: status=0x%02x", drive->name, msg, stat);
-#if FANCY_STATUS_DUMPS
- if (drive->media == ide_disk) {
- printk(" { ");
- if (stat & BUSY_STAT)
- printk("Busy ");
- else {
- if (stat & READY_STAT) printk("DriveReady ");
- if (stat & WRERR_STAT) printk("DeviceFault ");
- if (stat & SEEK_STAT) printk("SeekComplete ");
- if (stat & DRQ_STAT) printk("DataRequest ");
- if (stat & ECC_STAT) printk("CorrectedError ");
- if (stat & INDEX_STAT) printk("Index ");
- if (stat & ERR_STAT) printk("Error ");
- }
- printk("}");
- }
-#endif /* FANCY_STATUS_DUMPS */
- printk("\n");
- if ((stat & (BUSY_STAT|ERR_STAT)) == ERR_STAT) {
- err = GET_ERR();
- printk("%s: %s: error=0x%02x", drive->name, msg, err);
-#if FANCY_STATUS_DUMPS
- if (drive->media == ide_disk) {
- printk(" { ");
- if (err & ICRC_ERR) printk((err & ABRT_ERR) ? "BadCRC " : "BadSector ");
- if (err & ECC_ERR) printk("UncorrectableError ");
- if (err & ID_ERR) printk("SectorIdNotFound ");
- if (err & ABRT_ERR) printk("DriveStatusError ");
- if (err & TRK0_ERR) printk("TrackZeroNotFound ");
- if (err & MARK_ERR) printk("AddrMarkNotFound ");
- printk("}");
- if (err & (BBD_ERR|ECC_ERR|ID_ERR|MARK_ERR)) {
- byte cur = IN_BYTE(IDE_SELECT_REG);
- if (cur & 0x40) { /* using LBA? */
- printk(", LBAsect=%ld", (unsigned long)
- ((cur&0xf)<<24)
- |(IN_BYTE(IDE_HCYL_REG)<<16)
- |(IN_BYTE(IDE_LCYL_REG)<<8)
- | IN_BYTE(IDE_SECTOR_REG));
- } else {
- printk(", CHS=%d/%d/%d",
- (IN_BYTE(IDE_HCYL_REG)<<8) +
- IN_BYTE(IDE_LCYL_REG),
- cur & 0xf,
- IN_BYTE(IDE_SECTOR_REG));
- }
- if (HWGROUP(drive)->rq)
- printk(", sector=%ld", HWGROUP(drive)->rq->sector);
- }
- }
-#endif /* FANCY_STATUS_DUMPS */
- printk("\n");
- }
- restore_flags (flags);
- return err;
-}
-
-/*
- * try_to_flush_leftover_data() is invoked in response to a drive
- * unexpectedly having its DRQ_STAT bit set. As an alternative to
- * resetting the drive, this routine tries to clear the condition
- * by read a sector's worth of data from the drive. Of course,
- * this may not help if the drive is *waiting* for data from *us*.
- */
-static void try_to_flush_leftover_data (ide_drive_t *drive)
-{
- int i = (drive->mult_count ? drive->mult_count : 1) * SECTOR_WORDS;
-
- while (i > 0) {
- unsigned long buffer[16];
- unsigned int wcount = (i > 16) ? 16 : i;
- i -= wcount;
- ide_input_data (drive, buffer, wcount);
- }
-}
-
-/*
- * ide_error() takes action based on the error returned by the controller.
- */
-void ide_error (ide_drive_t *drive, const char *msg, byte stat)
-{
- struct request *rq;
- byte err;
-
- err = ide_dump_status(drive, msg, stat);
- if ((rq = HWGROUP(drive)->rq) == NULL || drive == NULL)
- return;
- /* retry only "normal" I/O: */
- if (rq->cmd == IDE_DRIVE_CMD) {
- rq->errors = 1;
- ide_end_drive_cmd(drive, stat, err);
- return;
- }
- if (stat & BUSY_STAT) { /* other bits are useless when BUSY */
- rq->errors |= ERROR_RESET;
- } else {
- if (drive->media == ide_disk && (stat & ERR_STAT)) {
- /* err has different meaning on cdrom and tape */
- if (err == ABRT_ERR) {
- if (drive->select.b.lba && IN_BYTE(IDE_COMMAND_REG) == WIN_SPECIFY)
- return; /* some newer drives don't support WIN_SPECIFY */
- } else if ((err & (ABRT_ERR | ICRC_ERR)) == (ABRT_ERR | ICRC_ERR))
- ; /* UDMA crc error -- just retry the operation */
- else if (err & (BBD_ERR | ECC_ERR)) /* retries won't help these */
- rq->errors = ERROR_MAX;
- else if (err & TRK0_ERR) /* help it find track zero */
- rq->errors |= ERROR_RECAL;
- else if (err & MC_ERR)
- drive->special.b.mc = 1;
- }
- if ((stat & DRQ_STAT) && rq->cmd != WRITE)
- try_to_flush_leftover_data(drive);
- }
- if (GET_STAT() & (BUSY_STAT|DRQ_STAT))
- rq->errors |= ERROR_RESET; /* Mmmm.. timing problem */
-
- if (rq->errors >= ERROR_MAX) {
-#ifdef CONFIG_BLK_DEV_IDETAPE
- if (drive->media == ide_tape) {
- rq->errors = 0;
- idetape_end_request(0, HWGROUP(drive));
- } else
-#endif /* CONFIG_BLK_DEV_IDETAPE */
-#ifdef CONFIG_BLK_DEV_IDEFLOPPY
- if (drive->media == ide_floppy) {
- rq->errors = 0;
- idefloppy_end_request(0, HWGROUP(drive));
- } else
-#endif /* CONFIG_BLK_DEV_IDEFLOPPY */
-#ifdef CONFIG_BLK_DEV_IDESCSI
- if (drive->media == ide_scsi) {
- rq->errors = 0;
- idescsi_end_request(0, HWGROUP(drive));
- } else
-#endif /* CONFIG_BLK_DEV_IDESCSI */
- ide_end_request(0, HWGROUP(drive));
- }
- else {
- if ((rq->errors & ERROR_RESET) == ERROR_RESET) {
- ++rq->errors;
- ide_do_reset(drive);
- return;
- } else if ((rq->errors & ERROR_RECAL) == ERROR_RECAL)
- drive->special.b.recalibrate = 1;
- ++rq->errors;
- }
-}
-
-/*
- * read_intr() is the handler for disk read/multread interrupts
- */
-static void read_intr (ide_drive_t *drive)
-{
- byte stat;
- int i;
- unsigned int msect, nsect;
- struct request *rq;
-
- if (!OK_STAT(stat=GET_STAT(),DATA_READY,BAD_R_STAT)) {
- ide_error(drive, "read_intr", stat);
- return;
- }
- msect = drive->mult_count;
-read_next:
- rq = HWGROUP(drive)->rq;
- if (msect) {
- if ((nsect = rq->current_nr_sectors) > msect)
- nsect = msect;
- msect -= nsect;
- } else
- nsect = 1;
- i = rq->nr_sectors - nsect;
- if (i > 0 && !msect)
- ide_set_handler (drive, &read_intr, WAIT_CMD);
- ide_input_data(drive, rq->buffer, nsect * SECTOR_WORDS);
-#ifdef DEBUG
- printk("%s: read: sectors(%ld-%ld), buffer=0x%08lx, remaining=%ld\n",
- drive->name, rq->sector, rq->sector+nsect-1,
- (unsigned long) rq->buffer+(nsect<<9), rq->nr_sectors-nsect);
-#endif
- rq->sector += nsect;
- rq->buffer += nsect<<9;
- rq->errors = 0;
- rq->nr_sectors = i;
- if ((rq->current_nr_sectors -= nsect) <= 0)
- ide_end_request(1, HWGROUP(drive));
- if (i > 0 && msect)
- goto read_next;
-}
-
-/*
- * write_intr() is the handler for disk write interrupts
- */
-static void write_intr (ide_drive_t *drive)
-{
- byte stat;
- int i;
- ide_hwgroup_t *hwgroup = HWGROUP(drive);
- struct request *rq = hwgroup->rq;
-
- if (OK_STAT(stat=GET_STAT(),DRIVE_READY,drive->bad_wstat)) {
-#ifdef DEBUG
- printk("%s: write: sector %ld, buffer=0x%08lx, remaining=%ld\n",
- drive->name, rq->sector, (unsigned long) rq->buffer,
- rq->nr_sectors-1);
-#endif
- if ((rq->nr_sectors == 1) ^ ((stat & DRQ_STAT) != 0)) {
- rq->sector++;
- rq->buffer += 512;
- rq->errors = 0;
- i = --rq->nr_sectors;
- --rq->current_nr_sectors;
- if (rq->current_nr_sectors <= 0)
- ide_end_request(1, hwgroup);
- if (i > 0) {
- ide_set_handler (drive, &write_intr, WAIT_CMD);
- ide_output_data (drive, rq->buffer, SECTOR_WORDS);
- }
- return;
- }
- }
- ide_error(drive, "write_intr", stat);
-}
-
-/*
- * ide_multwrite() transfers a block of up to mcount sectors of data
- * to a drive as part of a disk multiple-sector write operation.
- */
-void ide_multwrite (ide_drive_t *drive, unsigned int mcount)
-{
- struct request *rq = &HWGROUP(drive)->wrq;
-
- do {
- unsigned int nsect = rq->current_nr_sectors;
- if (nsect > mcount)
- nsect = mcount;
- mcount -= nsect;
-
- ide_output_data(drive, rq->buffer, nsect<<7);
-#ifdef DEBUG
- printk("%s: multwrite: sector %ld, buffer=0x%08lx, count=%d, remaining=%ld\n",
- drive->name, rq->sector, (unsigned long) rq->buffer,
- nsect, rq->nr_sectors - nsect);
-#endif
- if ((rq->nr_sectors -= nsect) <= 0)
- break;
- if ((rq->current_nr_sectors -= nsect) == 0) {
- if ((rq->bh = rq->bh->b_reqnext) != NULL) {
- rq->current_nr_sectors = rq->bh->b_size>>9;
- rq->buffer = rq->bh->b_data;
- } else {
- panic("%s: buffer list corrupted\n", drive->name);
- break;
- }
- } else {
- rq->buffer += nsect << 9;
- }
- } while (mcount);
-}
-
-/*
- * multwrite_intr() is the handler for disk multwrite interrupts
- */
-static void multwrite_intr (ide_drive_t *drive)
-{
- byte stat;
- int i;
- ide_hwgroup_t *hwgroup = HWGROUP(drive);
- struct request *rq = &hwgroup->wrq;
-
- if (OK_STAT(stat=GET_STAT(),DRIVE_READY,drive->bad_wstat)) {
- if (stat & DRQ_STAT) {
- if (rq->nr_sectors) {
- ide_set_handler (drive, &multwrite_intr, WAIT_CMD);
- ide_multwrite(drive, drive->mult_count);
- return;
- }
- } else {
- if (!rq->nr_sectors) { /* all done? */
- rq = hwgroup->rq;
- for (i = rq->nr_sectors; i > 0;){
- i -= rq->current_nr_sectors;
- ide_end_request(1, hwgroup);
- }
- return;
- }
- }
- }
- ide_error(drive, "multwrite_intr", stat);
-}
-
-/*
- * Issue a simple drive command
- * The drive must be selected beforehand.
- */
-static void ide_cmd(ide_drive_t *drive, byte cmd, byte nsect, ide_handler_t *handler)
-{
- ide_set_handler (drive, handler, WAIT_CMD);
- OUT_BYTE(drive->ctl,IDE_CONTROL_REG);
- OUT_BYTE(nsect,IDE_NSECTOR_REG);
- OUT_BYTE(cmd,IDE_COMMAND_REG);
-}
-
-/*
- * set_multmode_intr() is invoked on completion of a WIN_SETMULT cmd.
- */
-static void set_multmode_intr (ide_drive_t *drive)
-{
- byte stat = GET_STAT();
-
- sti();
- if (OK_STAT(stat,READY_STAT,BAD_STAT)) {
- drive->mult_count = drive->mult_req;
- } else {
- drive->mult_req = drive->mult_count = 0;
- drive->special.b.recalibrate = 1;
- (void) ide_dump_status(drive, "set_multmode", stat);
- }
-}
-
-/*
- * set_geometry_intr() is invoked on completion of a WIN_SPECIFY cmd.
- */
-static void set_geometry_intr (ide_drive_t *drive)
-{
- byte stat = GET_STAT();
-
- sti();
- if (!OK_STAT(stat,READY_STAT,BAD_STAT))
- ide_error(drive, "set_geometry_intr", stat);
-}
-
-/*
- * recal_intr() is invoked on completion of a WIN_RESTORE (recalibrate) cmd.
- */
-static void recal_intr (ide_drive_t *drive)
-{
- byte stat = GET_STAT();
-
- sti();
- if (!OK_STAT(stat,READY_STAT,BAD_STAT))
- ide_error(drive, "recal_intr", stat);
-}
-
-/*
- * mc_intr() is invoked on completion of a WIN_ACKMC cmd.
- */
-static void mc_intr (ide_drive_t *drive)
-{
- byte stat = GET_STAT();
-
- sti();
- if (!OK_STAT(stat,READY_STAT,BAD_STAT))
- ide_error(drive, "mc_intr", stat);
- drive->special.b.mc = 0;
-}
-
-/*
- * drive_cmd_intr() is invoked on completion of a special DRIVE_CMD.
- */
-static void drive_cmd_intr (ide_drive_t *drive)
-{
- struct request *rq = HWGROUP(drive)->rq;
- byte *args = (byte *) rq->buffer;
- byte stat = GET_STAT();
-
- sti();
- if ((stat & DRQ_STAT) && args && args[3]) {
- byte io_32bit = drive->io_32bit;
- drive->io_32bit = 0;
- ide_input_data(drive, &args[4], args[3] * SECTOR_WORDS);
- drive->io_32bit = io_32bit;
- stat = GET_STAT();
- }
- if (OK_STAT(stat,READY_STAT,BAD_STAT))
- ide_end_drive_cmd (drive, stat, GET_ERR());
- else
- ide_error(drive, "drive_cmd", stat); /* calls ide_end_drive_cmd */
-}
-
-/*
- * do_special() is used to issue WIN_SPECIFY, WIN_RESTORE, and WIN_SETMULT
- * commands to a drive. It used to do much more, but has been scaled back.
- */
-static inline void do_special (ide_drive_t *drive)
-{
- special_t *s = &drive->special;
-
-#ifdef DEBUG
- printk("%s: do_special: 0x%02x\n", drive->name, s->all);
-#endif
- if (s->b.set_geometry) {
- s->b.set_geometry = 0;
- if (drive->media == ide_disk && !drive->no_geom) {
- OUT_BYTE(drive->sect,IDE_SECTOR_REG);
- OUT_BYTE(drive->cyl,IDE_LCYL_REG);
- OUT_BYTE(drive->cyl>>8,IDE_HCYL_REG);
- OUT_BYTE(((drive->head-1)|drive->select.all)&0xBF,IDE_SELECT_REG);
- if (!IS_PROMISE_DRIVE)
- ide_cmd(drive, WIN_SPECIFY, drive->sect, &set_geometry_intr);
- }
- } else if (s->b.recalibrate) {
- s->b.recalibrate = 0;
- if (drive->media == ide_disk && !IS_PROMISE_DRIVE)
- ide_cmd(drive, WIN_RESTORE, drive->sect, &recal_intr);
- } else if (s->b.set_tune) {
- ide_tuneproc_t *tuneproc = HWIF(drive)->tuneproc;
- s->b.set_tune = 0;
- if (tuneproc != NULL)
- tuneproc(drive, drive->tune_req);
- } else if (s->b.set_multmode) {
- s->b.set_multmode = 0;
- if (drive->media == ide_disk) {
- if (drive->id && drive->mult_req > drive->id->max_multsect)
- drive->mult_req = drive->id->max_multsect;
- if (!IS_PROMISE_DRIVE)
- ide_cmd(drive, WIN_SETMULT, drive->mult_req, &set_multmode_intr);
- } else
- drive->mult_req = 0;
- } else if (s->b.mc) {
- s->b.mc = 0;
- if (drive->media == ide_disk && !IS_PROMISE_DRIVE)
- ide_cmd(drive, WIN_ACKMC, drive->sect, &mc_intr);
- } else if (s->all) {
- int special = s->all;
- s->all = 0;
- printk("%s: bad special flag: 0x%02x\n", drive->name, special);
- }
-}
-
-/*
- * This routine busy-waits for the drive status to be not "busy".
- * It then checks the status for all of the "good" bits and none
- * of the "bad" bits, and if all is okay it returns 0. All other
- * cases return 1 after invoking ide_error() -- caller should just return.
- *
- * This routine should get fixed to not hog the cpu during extra long waits..
- * That could be done by busy-waiting for the first jiffy or two, and then
- * setting a timer to wake up at half second intervals thereafter,
- * until timeout is achieved, before timing out.
- */
-int ide_wait_stat (ide_drive_t *drive, byte good, byte bad, unsigned long timeout)
-{
- byte stat;
- unsigned long flags;
-
- udelay(1); /* spec allows drive 400ns to assert "BUSY" */
- if ((stat = GET_STAT()) & BUSY_STAT) {
- save_flags(flags);
- sti();
- timeout += jiffies;
- while ((stat = GET_STAT()) & BUSY_STAT) {
- if (jiffies > timeout) {
- restore_flags(flags);
- ide_error(drive, "status timeout", stat);
- return 1;
- }
- }
- restore_flags(flags);
- }
- udelay(1); /* allow status to settle, then read it again */
- if (OK_STAT((stat = GET_STAT()), good, bad))
- return 0;
- ide_error(drive, "status error", stat);
- return 1;
-}
-
-/*
- * do_rw_disk() issues READ and WRITE commands to a disk,
- * using LBA if supported, or CHS otherwise, to address sectors.
- * It also takes care of issuing special DRIVE_CMDs.
- */
-static inline void do_rw_disk (ide_drive_t *drive, struct request *rq, unsigned long block)
-{
- ide_hwif_t *hwif = HWIF(drive);
- unsigned short io_base = hwif->io_base;
-#ifdef CONFIG_BLK_DEV_PROMISE
- int use_promise_io = 0;
-#endif /* CONFIG_BLK_DEV_PROMISE */
-
- OUT_BYTE(drive->ctl,IDE_CONTROL_REG);
- OUT_BYTE(rq->nr_sectors,io_base+IDE_NSECTOR_OFFSET);
-#ifdef CONFIG_BLK_DEV_PROMISE
- if (IS_PROMISE_DRIVE) {
- if (hwif->is_promise2 || rq->cmd == READ) {
- use_promise_io = 1;
- }
- }
- if (drive->select.b.lba || use_promise_io) {
-#else /* !CONFIG_BLK_DEV_PROMISE */
- if (drive->select.b.lba) {
-#endif /* CONFIG_BLK_DEV_PROMISE */
-#ifdef DEBUG
- printk("%s: %sing: LBAsect=%ld, sectors=%ld, buffer=0x%08lx\n",
- drive->name, (rq->cmd==READ)?"read":"writ",
- block, rq->nr_sectors, (unsigned long) rq->buffer);
-#endif
- OUT_BYTE(block,io_base+IDE_SECTOR_OFFSET);
- OUT_BYTE(block>>=8,io_base+IDE_LCYL_OFFSET);
- OUT_BYTE(block>>=8,io_base+IDE_HCYL_OFFSET);
- OUT_BYTE(((block>>8)&0x0f)|drive->select.all,io_base+IDE_SELECT_OFFSET);
- } else {
- unsigned int sect,head,cyl,track;
- track = block / drive->sect;
- sect = block % drive->sect + 1;
- OUT_BYTE(sect,io_base+IDE_SECTOR_OFFSET);
- head = track % drive->head;
- cyl = track / drive->head;
- OUT_BYTE(cyl,io_base+IDE_LCYL_OFFSET);
- OUT_BYTE(cyl>>8,io_base+IDE_HCYL_OFFSET);
- OUT_BYTE(head|drive->select.all,io_base+IDE_SELECT_OFFSET);
-#ifdef DEBUG
- printk("%s: %sing: CHS=%d/%d/%d, sectors=%ld, buffer=0x%08lx\n",
- drive->name, (rq->cmd==READ)?"read":"writ", cyl,
- head, sect, rq->nr_sectors, (unsigned long) rq->buffer);
-#endif
- }
-#ifdef CONFIG_BLK_DEV_PROMISE
- if (use_promise_io) {
- do_promise_io (drive, rq);
- return;
- }
-#endif /* CONFIG_BLK_DEV_PROMISE */
- if (rq->cmd == READ) {
-#ifdef CONFIG_BLK_DEV_TRITON
- if (drive->using_dma && !(HWIF(drive)->dmaproc(ide_dma_read, drive)))
- return;
-#endif /* CONFIG_BLK_DEV_TRITON */
- ide_set_handler(drive, &read_intr, WAIT_CMD);
- OUT_BYTE(drive->mult_count ? WIN_MULTREAD : WIN_READ, io_base+IDE_COMMAND_OFFSET);
- return;
- }
- if (rq->cmd == WRITE) {
-#ifdef CONFIG_BLK_DEV_TRITON
- if (drive->using_dma && !(HWIF(drive)->dmaproc(ide_dma_write, drive)))
- return;
-#endif /* CONFIG_BLK_DEV_TRITON */
- OUT_BYTE(drive->mult_count ? WIN_MULTWRITE : WIN_WRITE, io_base+IDE_COMMAND_OFFSET);
- if (ide_wait_stat(drive, DATA_READY, drive->bad_wstat, WAIT_DRQ)) {
- printk("%s: no DRQ after issuing %s\n", drive->name,
- drive->mult_count ? "MULTWRITE" : "WRITE");
- return;
- }
- if (!drive->unmask)
- cli();
- if (drive->mult_count) {
- HWGROUP(drive)->wrq = *rq; /* scratchpad */
- ide_set_handler (drive, &multwrite_intr, WAIT_CMD);
- ide_multwrite(drive, drive->mult_count);
- } else {
- ide_set_handler (drive, &write_intr, WAIT_CMD);
- ide_output_data(drive, rq->buffer, SECTOR_WORDS);
- }
- return;
- }
- printk("%s: bad command: %d\n", drive->name, rq->cmd);
- ide_end_request(0, HWGROUP(drive));
-}
-
-/*
- * execute_drive_cmd() issues a special drive command,
- * usually initiated by ioctl() from the external hdparm program.
- */
-static void execute_drive_cmd (ide_drive_t *drive, struct request *rq)
-{
- byte *args = rq->buffer;
- if (args) {
-#ifdef DEBUG
- printk("%s: DRIVE_CMD cmd=0x%02x sc=0x%02x fr=0x%02x xx=0x%02x\n",
- drive->name, args[0], args[1], args[2], args[3]);
-#endif
- OUT_BYTE(args[2],IDE_FEATURE_REG);
- ide_cmd(drive, args[0], args[1], &drive_cmd_intr);
- return;
- } else {
- /*
- * NULL is actually a valid way of waiting for
- * all current requests to be flushed from the queue.
- */
-#ifdef DEBUG
- printk("%s: DRIVE_CMD (null)\n", drive->name);
-#endif
- ide_end_drive_cmd(drive, GET_STAT(), GET_ERR());
- return;
- }
-}
-
-/*
- * do_request() initiates handling of a new I/O request
- */
-static inline void do_request (ide_hwif_t *hwif, struct request *rq)
-{
- unsigned int minor, unit;
- unsigned long block, blockend;
- ide_drive_t *drive;
-
- sti();
-#ifdef DEBUG
- printk("%s: do_request: current=0x%08lx\n", hwif->name, (unsigned long) rq);
-#endif
- minor = MINOR(rq->rq_dev);
- unit = minor >> PARTN_BITS;
- if (MAJOR(rq->rq_dev) != hwif->major || unit >= MAX_DRIVES) {
- printk("%s: bad device number: %s\n",
- hwif->name, kdevname(rq->rq_dev));
- goto kill_rq;
- }
- drive = &hwif->drives[unit];
-#ifdef DEBUG
- if (rq->bh && !buffer_locked(rq->bh)) {
- printk("%s: block not locked\n", drive->name);
- goto kill_rq;
- }
-#endif
- block = rq->sector;
- blockend = block + rq->nr_sectors;
- if ((blockend < block) || (blockend > drive->part[minor&PARTN_MASK].nr_sects)) {
-#ifdef MACH
- printk ("%s%c: bad access: block=%ld, count=%ld, blockend=%ld, nr_sects%ld\n",
- drive->name, (minor&PARTN_MASK)?'0'+(minor&PARTN_MASK):' ',
- block, rq->nr_sectors, blockend, drive->part[minor&PARTN_MASK].nr_sects);
-#else
- printk("%s%c: bad access: block=%ld, count=%ld\n", drive->name,
- (minor&PARTN_MASK)?'0'+(minor&PARTN_MASK):' ', block, rq->nr_sectors);
-#endif
- goto kill_rq;
- }
- block += drive->part[minor&PARTN_MASK].start_sect + drive->sect0;
-#if FAKE_FDISK_FOR_EZDRIVE
- if (block == 0 && drive->remap_0_to_1)
- block = 1; /* redirect MBR access to EZ-Drive partn table */
-#endif /* FAKE_FDISK_FOR_EZDRIVE */
- ((ide_hwgroup_t *)hwif->hwgroup)->drive = drive;
-#if (DISK_RECOVERY_TIME > 0)
- while ((read_timer() - hwif->last_time) < DISK_RECOVERY_TIME);
-#endif
-
-#ifdef CONFIG_BLK_DEV_IDETAPE
- POLL_HWIF_TAPE_DRIVE; /* macro from ide-tape.h */
-#endif /* CONFIG_BLK_DEV_IDETAPE */
-
- SELECT_DRIVE(hwif,drive);
- if (ide_wait_stat(drive, drive->ready_stat, BUSY_STAT|DRQ_STAT, WAIT_READY)) {
- printk("%s: drive not ready for command\n", drive->name);
- return;
- }
-
- if (!drive->special.all) {
- if (rq->cmd == IDE_DRIVE_CMD) {
- execute_drive_cmd(drive, rq);
- return;
- }
-#ifdef CONFIG_BLK_DEV_IDEATAPI
- switch (drive->media) {
- case ide_disk:
- do_rw_disk (drive, rq, block);
- return;
-#ifdef CONFIG_BLK_DEV_IDECD
- case ide_cdrom:
- ide_do_rw_cdrom (drive, block);
- return;
-#endif /* CONFIG_BLK_DEV_IDECD */
-#ifdef CONFIG_BLK_DEV_IDETAPE
- case ide_tape:
- idetape_do_request (drive, rq, block);
- return;
-#endif /* CONFIG_BLK_DEV_IDETAPE */
-#ifdef CONFIG_BLK_DEV_IDEFLOPPY
- case ide_floppy:
- idefloppy_do_request (drive, rq, block);
- return;
-#endif /* CONFIG_BLK_DEV_IDEFLOPPY */
-#ifdef CONFIG_BLK_DEV_IDESCSI
- case ide_scsi:
- idescsi_do_request (drive, rq, block);
- return;
-#endif /* CONFIG_BLK_DEV_IDESCSI */
-
- default:
- printk("%s: media type %d not supported\n",
- drive->name, drive->media);
- goto kill_rq;
- }
-#else
- do_rw_disk (drive, rq, block); /* simpler and faster */
- return;
-#endif /* CONFIG_BLK_DEV_IDEATAPI */
- }
- do_special(drive);
- return;
-kill_rq:
- ide_end_request(0, hwif->hwgroup);
-}
-
-/*
- * The driver enables interrupts as much as possible. In order to do this,
- * (a) the device-interrupt is always masked before entry, and
- * (b) the timeout-interrupt is always disabled before entry.
- *
- * If we enter here from, say irq14, and then start a new request for irq15,
- * (possible with "serialize" option) then we cannot ensure that we exit
- * before the irq15 hits us. So, we must be careful not to let this bother us.
- *
- * Interrupts are still masked (by default) whenever we are exchanging
- * data/cmds with a drive, because some drives seem to have very poor
- * tolerance for latency during I/O. For devices which don't suffer from
- * this problem (most don't), the unmask flag can be set using the "hdparm"
- * utility, to permit other interrupts during data/cmd transfers.
- */
-void ide_do_request (ide_hwgroup_t *hwgroup)
-{
- cli(); /* paranoia */
- if (hwgroup->handler != NULL) {
- printk("%s: EEeekk!! handler not NULL in ide_do_request()\n", hwgroup->hwif->name);
- return;
- }
- do {
- ide_hwif_t *hwif = hwgroup->hwif;
- struct request *rq;
- if ((rq = hwgroup->rq) == NULL) {
- if (hwif->sharing_irq && hwgroup->drive) /* set nIEN */
- OUT_BYTE(hwgroup->drive->ctl|2,hwif->ctl_port);
- /*
- * hwgroup->next_hwif is different from hwgroup->hwif
- * only when a request is inserted using "ide_next".
- * This saves wear and tear on IDE tapes.
- */
- hwif = hwgroup->next_hwif;
- do {
- rq = blk_dev[hwif->major].current_request;
- if (rq != NULL && rq->rq_status != RQ_INACTIVE)
- goto got_rq;
- } while ((hwif = hwif->next) != hwgroup->next_hwif);
- hwgroup->active = 0;
- return; /* no work left for this hwgroup */
- }
- got_rq:
- do_request(hwgroup->hwif = hwgroup->next_hwif = hwif, hwgroup->rq = rq);
- cli();
- } while (hwgroup->handler == NULL);
-}
-
-/*
- * do_hwgroup_request() invokes ide_do_request() after first masking
- * all possible interrupts for the current hwgroup. This prevents race
- * conditions in the event that an unexpected interrupt occurs while
- * we are in the driver.
- *
- * Note that when an interrupt is used to reenter the driver, the first level
- * handler will already have masked the irq that triggered, but any other ones
- * for the hwgroup will still be unmasked. The driver tries to be careful
- * about such things.
- */
-static void do_hwgroup_request (ide_hwgroup_t *hwgroup)
-{
- if (hwgroup->handler == NULL) {
- ide_hwif_t *hgif = hwgroup->hwif;
- ide_hwif_t *hwif = hgif;
- hwgroup->active = 1;
- do {
- disable_irq(hwif->irq);
- } while ((hwif = hwif->next) != hgif);
- ide_do_request (hwgroup);
- do {
- enable_irq(hwif->irq);
- } while ((hwif = hwif->next) != hgif);
- }
-}
-
-static void do_ide0_request (void) /* invoked with cli() */
-{
- do_hwgroup_request (ide_hwifs[0].hwgroup);
-}
-
-#if MAX_HWIFS > 1
-static void do_ide1_request (void) /* invoked with cli() */
-{
- do_hwgroup_request (ide_hwifs[1].hwgroup);
-}
-#endif
-
-#if MAX_HWIFS > 2
-static void do_ide2_request (void) /* invoked with cli() */
-{
- do_hwgroup_request (ide_hwifs[2].hwgroup);
-}
-#endif
-
-#if MAX_HWIFS > 3
-static void do_ide3_request (void) /* invoked with cli() */
-{
- do_hwgroup_request (ide_hwifs[3].hwgroup);
-}
-#endif
-
-static void timer_expiry (unsigned long data)
-{
- ide_hwgroup_t *hwgroup = (ide_hwgroup_t *) data;
- ide_drive_t *drive = hwgroup->drive;
- unsigned long flags;
-
- save_flags(flags);
- cli();
-
- if (hwgroup->poll_timeout != 0) { /* polling in progress? */
- ide_handler_t *handler = hwgroup->handler;
- hwgroup->handler = NULL;
- handler(drive);
- } else if (hwgroup->handler == NULL) { /* not waiting for anything? */
- sti(); /* drive must have responded just as the timer expired */
- printk("%s: marginal timeout\n", drive->name);
- } else {
- hwgroup->handler = NULL; /* abort the operation */
- if (hwgroup->hwif->dmaproc)
- (void) hwgroup->hwif->dmaproc (ide_dma_abort, drive);
- ide_error(drive, "irq timeout", GET_STAT());
- }
- if (hwgroup->handler == NULL)
- do_hwgroup_request (hwgroup);
- restore_flags(flags);
-}
-
-/*
- * There's nothing really useful we can do with an unexpected interrupt,
- * other than reading the status register (to clear it), and logging it.
- * There should be no way that an irq can happen before we're ready for it,
- * so we needn't worry much about losing an "important" interrupt here.
- *
- * On laptops (and "green" PCs), an unexpected interrupt occurs whenever the
- * drive enters "idle", "standby", or "sleep" mode, so if the status looks
- * "good", we just ignore the interrupt completely.
- *
- * This routine assumes cli() is in effect when called.
- *
- * If an unexpected interrupt happens on irq15 while we are handling irq14
- * and if the two interfaces are "serialized" (CMD640), then it looks like
- * we could screw up by interfering with a new request being set up for irq15.
- *
- * In reality, this is a non-issue. The new command is not sent unless the
- * drive is ready to accept one, in which case we know the drive is not
- * trying to interrupt us. And ide_set_handler() is always invoked before
- * completing the issuance of any new drive command, so we will not be
- * accidently invoked as a result of any valid command completion interrupt.
- *
- */
-static void unexpected_intr (int irq, ide_hwgroup_t *hwgroup)
-{
- byte stat;
- unsigned int unit;
- ide_hwif_t *hwif = hwgroup->hwif;
-
- /*
- * handle the unexpected interrupt
- */
- do {
- if (hwif->irq == irq) {
- for (unit = 0; unit < MAX_DRIVES; ++unit) {
- ide_drive_t *drive = &hwif->drives[unit];
- if (!drive->present)
- continue;
- SELECT_DRIVE(hwif,drive);
- udelay(100); /* Ugly, but wait_stat() may not be safe here */
- if (!OK_STAT(stat=GET_STAT(), drive->ready_stat, BAD_STAT)) {
- /* Try to not flood the console with msgs */
- static unsigned long last_msgtime = 0;
- if ((last_msgtime + (HZ/2)) < jiffies) {
- last_msgtime = jiffies;
- (void) ide_dump_status(drive, "unexpected_intr", stat);
- }
- }
- if ((stat & DRQ_STAT))
- try_to_flush_leftover_data(drive);
- }
- }
- } while ((hwif = hwif->next) != hwgroup->hwif);
- SELECT_DRIVE(hwif,hwgroup->drive); /* Ugh.. probably interrupts current I/O */
- udelay(100); /* Ugly, but wait_stat() may not be safe here */
-}
-
-/*
- * entry point for all interrupts, caller does cli() for us
- */
-void ide_intr (int irq, void *dev_id, struct pt_regs *regs)
-{
- ide_hwgroup_t *hwgroup = dev_id;
- ide_handler_t *handler;
-
- if (irq == hwgroup->hwif->irq && (handler = hwgroup->handler) != NULL) {
- ide_drive_t *drive = hwgroup->drive;
- hwgroup->handler = NULL;
- del_timer(&(hwgroup->timer));
- if (drive->unmask)
- sti();
- handler(drive);
- cli(); /* this is necessary, as next rq may be different irq */
- if (hwgroup->handler == NULL) {
- SET_RECOVERY_TIMER(HWIF(drive));
- ide_do_request(hwgroup);
- }
- } else {
- unexpected_intr(irq, hwgroup);
- }
- cli();
-}
-
-/*
- * get_info_ptr() returns the (ide_drive_t *) for a given device number.
- * It returns NULL if the given device number does not match any present drives.
- */
-static ide_drive_t *get_info_ptr (kdev_t i_rdev)
-{
- int major = MAJOR(i_rdev);
- unsigned int h;
-
- for (h = 0; h < MAX_HWIFS; ++h) {
- ide_hwif_t *hwif = &ide_hwifs[h];
- if (hwif->present && major == hwif->major) {
- unsigned unit = DEVICE_NR(i_rdev);
- if (unit < MAX_DRIVES) {
- ide_drive_t *drive = &hwif->drives[unit];
- if (drive->present)
- return drive;
- } else if (major == IDE0_MAJOR && unit < 4) {
- printk("ide: probable bad entry for /dev/hd%c\n", 'a'+unit);
- printk("ide: to fix it, run: /usr/src/linux/scripts/MAKEDEV.ide\n");
- }
- break;
- }
- }
- return NULL;
-}
-
-/*
- * This function is intended to be used prior to invoking ide_do_drive_cmd().
- */
-void ide_init_drive_cmd (struct request *rq)
-{
- rq->buffer = NULL;
- rq->cmd = IDE_DRIVE_CMD;
- rq->sector = 0;
- rq->nr_sectors = 0;
- rq->current_nr_sectors = 0;
- rq->sem = NULL;
- rq->bh = NULL;
- rq->bhtail = NULL;
- rq->next = NULL;
-
-#if 0 /* these are done each time through ide_do_drive_cmd() */
- rq->errors = 0;
- rq->rq_status = RQ_ACTIVE;
- rq->rq_dev = ????;
-#endif
-}
-
-/*
- * This function issues a special IDE device request
- * onto the request queue.
- *
- * If action is ide_wait, then the rq is queued at the end of the
- * request queue, and the function sleeps until it has been processed.
- * This is for use when invoked from an ioctl handler.
- *
- * If action is ide_preempt, then the rq is queued at the head of
- * the request queue, displacing the currently-being-processed
- * request and this function returns immediately without waiting
- * for the new rq to be completed. This is VERY DANGEROUS, and is
- * intended for careful use by the ATAPI tape/cdrom driver code.
- *
- * If action is ide_next, then the rq is queued immediately after
- * the currently-being-processed-request (if any), and the function
- * returns without waiting for the new rq to be completed. As above,
- * This is VERY DANGEROUS, and is intended for careful use by the
- * ATAPI tape/cdrom driver code.
- *
- * If action is ide_end, then the rq is queued at the end of the
- * request queue, and the function returns immediately without waiting
- * for the new rq to be completed. This is again intended for careful
- * use by the ATAPI tape/cdrom driver code. (Currently used by ide-tape.c,
- * when operating in the pipelined operation mode).
- */
-int ide_do_drive_cmd (ide_drive_t *drive, struct request *rq, ide_action_t action)
-{
- unsigned long flags;
- unsigned int major = HWIF(drive)->major;
- struct request *cur_rq;
- struct blk_dev_struct *bdev = &blk_dev[major];
- struct semaphore sem = MUTEX_LOCKED;
-
- if (IS_PROMISE_DRIVE && rq->buffer != NULL)
- return -ENOSYS; /* special drive cmds not supported */
- rq->errors = 0;
- rq->rq_status = RQ_ACTIVE;
- rq->rq_dev = MKDEV(major,(drive->select.b.unit)<<PARTN_BITS);
- if (action == ide_wait)
- rq->sem = &sem;
- unplug_device(bdev);
-
- save_flags(flags);
- cli();
- if (action == ide_next)
- HWGROUP(drive)->next_hwif = HWIF(drive);
- cur_rq = bdev->current_request;
-
- if (cur_rq == NULL || action == ide_preempt) {
- rq->next = cur_rq;
- bdev->current_request = rq;
- if (action == ide_preempt)
- HWGROUP(drive)->rq = NULL;
- } else {
- if (action == ide_wait || action == ide_end) {
- while (cur_rq->next != NULL) /* find end of list */
- cur_rq = cur_rq->next;
- }
- rq->next = cur_rq->next;
- cur_rq->next = rq;
- }
- if (!HWGROUP(drive)->active) {
- do_hwgroup_request(HWGROUP(drive));
- cli();
- }
- if (action == ide_wait && rq->rq_status != RQ_INACTIVE)
- down(&sem); /* wait for it to be serviced */
- restore_flags(flags);
- return rq->errors ? -EIO : 0; /* return -EIO if errors */
-}
-
-static int ide_open(struct inode * inode, struct file * filp)
-{
- ide_drive_t *drive;
- unsigned long flags;
-
- if ((drive = get_info_ptr(inode->i_rdev)) == NULL)
- return -ENXIO;
- save_flags(flags);
- cli();
- while (drive->busy)
- sleep_on(&drive->wqueue);
- drive->usage++;
- restore_flags(flags);
-#ifdef CONFIG_BLK_DEV_IDECD
- if (drive->media == ide_cdrom)
- return ide_cdrom_open (inode, filp, drive);
-#endif /* CONFIG_BLK_DEV_IDECD */
-#ifdef CONFIG_BLK_DEV_IDETAPE
- if (drive->media == ide_tape)
- return idetape_blkdev_open (inode, filp, drive);
-#endif /* CONFIG_BLK_DEV_IDETAPE */
-#ifdef CONFIG_BLK_DEV_IDEFLOPPY
- if (drive->media == ide_floppy)
- return idefloppy_open (inode, filp, drive);
-#endif /* CONFIG_BLK_DEV_IDEFLOPPY */
-#ifdef CONFIG_BLK_DEV_IDESCSI
- if (drive->media == ide_scsi)
- return idescsi_open (inode, filp, drive);
-#endif /* CONFIG_BLK_DEV_IDESCSI */
- if (drive->removable && drive->usage == 1) {
- byte door_lock[] = {WIN_DOORLOCK,0,0,0};
- struct request rq;
- check_disk_change(inode->i_rdev);
- ide_init_drive_cmd (&rq);
- rq.buffer = door_lock;
- /*
- * Ignore the return code from door_lock,
- * since the open() has already succeeded,
- * and the door_lock is irrelevant at this point.
- */
- (void) ide_do_drive_cmd(drive, &rq, ide_wait);
- }
- return 0;
-}
-
-/*
- * Releasing a block device means we sync() it, so that it can safely
- * be forgotten about...
- */
-static void ide_release(struct inode * inode, struct file * file)
-{
- ide_drive_t *drive;
-
- if ((drive = get_info_ptr(inode->i_rdev)) != NULL) {
- fsync_dev(inode->i_rdev);
- drive->usage--;
-#ifdef CONFIG_BLK_DEV_IDECD
- if (drive->media == ide_cdrom) {
- ide_cdrom_release (inode, file, drive);
- return;
- }
-#endif /* CONFIG_BLK_DEV_IDECD */
-#ifdef CONFIG_BLK_DEV_IDETAPE
- if (drive->media == ide_tape) {
- idetape_blkdev_release (inode, file, drive);
- return;
- }
-#endif /* CONFIG_BLK_DEV_IDETAPE */
-#ifdef CONFIG_BLK_DEV_IDEFLOPPY
- if (drive->media == ide_floppy) {
- idefloppy_release (inode, file, drive);
- return;
- }
-#endif /* CONFIG_BLK_DEV_IDEFLOPPY */
-#ifdef CONFIG_BLK_DEV_IDESCSI
- if (drive->media == ide_scsi) {
- idescsi_ide_release (inode, file, drive);
- return;
- }
-#endif /* CONFIG_BLK_DEV_IDESCSI */
- if (drive->removable && !drive->usage) {
- byte door_unlock[] = {WIN_DOORUNLOCK,0,0,0};
- struct request rq;
- invalidate_buffers(inode->i_rdev);
- ide_init_drive_cmd (&rq);
- rq.buffer = door_unlock;
- (void) ide_do_drive_cmd(drive, &rq, ide_wait);
- }
- }
-}
-
-/*
- * This routine is called to flush all partitions and partition tables
- * for a changed disk, and then re-read the new partition table.
- * If we are revalidating a disk because of a media change, then we
- * enter with usage == 0. If we are using an ioctl, we automatically have
- * usage == 1 (we need an open channel to use an ioctl :-), so this
- * is our limit.
- */
-static int revalidate_disk(kdev_t i_rdev)
-{
- ide_drive_t *drive;
- unsigned int p, major, minor;
- long flags;
-
- if ((drive = get_info_ptr(i_rdev)) == NULL)
- return -ENODEV;
-
- major = MAJOR(i_rdev);
- minor = drive->select.b.unit << PARTN_BITS;
- save_flags(flags);
- cli();
- if (drive->busy || (drive->usage > 1)) {
- restore_flags(flags);
- return -EBUSY;
- };
- drive->busy = 1;
- restore_flags(flags);
-
- for (p = 0; p < (1<<PARTN_BITS); ++p) {
- if (drive->part[p].nr_sects > 0) {
- kdev_t devp = MKDEV(major, minor+p);
- fsync_dev (devp);
- invalidate_inodes (devp);
- invalidate_buffers (devp);
- set_blocksize(devp, 1024);
- }
- drive->part[p].start_sect = 0;
- drive->part[p].nr_sects = 0;
- };
-
- drive->part[0].nr_sects = current_capacity(drive);
- if ((drive->media != ide_disk && drive->media != ide_floppy) || !drive->part[0].nr_sects)
- drive->part[0].start_sect = -1;
- resetup_one_dev(HWIF(drive)->gd, drive->select.b.unit);
-
- drive->busy = 0;
- wake_up(&drive->wqueue);
- return 0;
-}
-
-static int write_fs_long (unsigned long useraddr, long value)
-{
- int err;
-
- if (NULL == (long *)useraddr)
- return -EINVAL;
- if ((err = verify_area(VERIFY_WRITE, (long *)useraddr, sizeof(long))))
- return err;
- put_user((unsigned)value, (long *) useraddr);
- return 0;
-}
-
-static int ide_ioctl (struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg)
-{
- int err;
- ide_drive_t *drive;
- unsigned long flags;
- struct request rq;
-
- if (!inode || !(inode->i_rdev))
- return -EINVAL;
- if ((drive = get_info_ptr(inode->i_rdev)) == NULL)
- return -ENODEV;
- ide_init_drive_cmd (&rq);
- switch (cmd) {
- case HDIO_GETGEO:
- {
- struct hd_geometry *loc = (struct hd_geometry *) arg;
- if (!loc || (drive->media != ide_disk && drive->media != ide_floppy)) return -EINVAL;
-#ifdef MACH
- loc->heads = drive->bios_head;
- loc->sectors = drive->bios_sect;
- loc->cylinders = drive->bios_cyl;
- loc->start
- = (drive->part[MINOR(inode->i_rdev)&PARTN_MASK]
- .start_sect);
-#else
- err = verify_area(VERIFY_WRITE, loc, sizeof(*loc));
- if (err) return err;
- put_user(drive->bios_head, (byte *) &loc->heads);
- put_user(drive->bios_sect, (byte *) &loc->sectors);
- put_user(drive->bios_cyl, (unsigned short *) &loc->cylinders);
- put_user((unsigned)drive->part[MINOR(inode->i_rdev)&PARTN_MASK].start_sect,
- (unsigned long *) &loc->start);
-#endif
- return 0;
- }
- case BLKFLSBUF:
- if (!suser()) return -EACCES;
- fsync_dev(inode->i_rdev);
- invalidate_buffers(inode->i_rdev);
- return 0;
-
- case BLKRASET:
- if (!suser()) return -EACCES;
- if(arg > 0xff) return -EINVAL;
- read_ahead[MAJOR(inode->i_rdev)] = arg;
- return 0;
-
- case BLKRAGET:
- return write_fs_long(arg, read_ahead[MAJOR(inode->i_rdev)]);
-
- case BLKGETSIZE: /* Return device size */
- return write_fs_long(arg, drive->part[MINOR(inode->i_rdev)&PARTN_MASK].nr_sects);
- case BLKRRPART: /* Re-read partition tables */
- if (!suser()) return -EACCES;
- return revalidate_disk(inode->i_rdev);
-
- case HDIO_GET_KEEPSETTINGS:
- return write_fs_long(arg, drive->keep_settings);
-
- case HDIO_GET_UNMASKINTR:
- return write_fs_long(arg, drive->unmask);
-
- case HDIO_GET_DMA:
- return write_fs_long(arg, drive->using_dma);
-
- case HDIO_GET_32BIT:
- return write_fs_long(arg, drive->io_32bit);
-
- case HDIO_GET_MULTCOUNT:
- return write_fs_long(arg, drive->mult_count);
-
- case HDIO_GET_IDENTITY:
- if (!arg || (MINOR(inode->i_rdev) & PARTN_MASK))
- return -EINVAL;
- if (drive->id == NULL)
- return -ENOMSG;
- err = verify_area(VERIFY_WRITE, (char *)arg, sizeof(*drive->id));
- if (!err)
- memcpy_tofs((char *)arg, (char *)drive->id, sizeof(*drive->id));
- return err;
-
- case HDIO_GET_NOWERR:
- return write_fs_long(arg, drive->bad_wstat == BAD_R_STAT);
-
- case HDIO_SET_DMA:
- if (!suser()) return -EACCES;
-#ifdef CONFIG_BLK_DEV_IDECD
- if (drive->media == ide_cdrom)
- return -EPERM;
-#endif /* CONFIG_BLK_DEV_IDECD */
- if (!drive->id || !(drive->id->capability & 1) || !HWIF(drive)->dmaproc)
- return -EPERM;
- case HDIO_SET_KEEPSETTINGS:
- case HDIO_SET_UNMASKINTR:
- case HDIO_SET_NOWERR:
- if (arg > 1)
- return -EINVAL;
- case HDIO_SET_32BIT:
- if (!suser()) return -EACCES;
- if ((MINOR(inode->i_rdev) & PARTN_MASK))
- return -EINVAL;
- save_flags(flags);
- cli();
- switch (cmd) {
- case HDIO_SET_DMA:
- if (!(HWIF(drive)->dmaproc)) {
- restore_flags(flags);
- return -EPERM;
- }
- drive->using_dma = arg;
- break;
- case HDIO_SET_KEEPSETTINGS:
- drive->keep_settings = arg;
- break;
- case HDIO_SET_UNMASKINTR:
- if (arg && drive->no_unmask) {
- restore_flags(flags);
- return -EPERM;
- }
- drive->unmask = arg;
- break;
- case HDIO_SET_NOWERR:
- drive->bad_wstat = arg ? BAD_R_STAT : BAD_W_STAT;
- break;
- case HDIO_SET_32BIT:
- if (arg > (1 + (SUPPORT_VLB_SYNC<<1))) {
- restore_flags(flags);
- return -EINVAL;
- }
- if (arg && drive->no_io_32bit) {
- restore_flags(flags);
- return -EPERM;
- }
- drive->io_32bit = arg;
-#ifdef CONFIG_BLK_DEV_DTC2278
- if (HWIF(drive)->chipset == ide_dtc2278)
- HWIF(drive)->drives[!drive->select.b.unit].io_32bit = arg;
-#endif /* CONFIG_BLK_DEV_DTC2278 */
- break;
- }
- restore_flags(flags);
- return 0;
-
- case HDIO_SET_MULTCOUNT:
- if (!suser()) return -EACCES;
- if (MINOR(inode->i_rdev) & PARTN_MASK)
- return -EINVAL;
- if (drive->id && arg > drive->id->max_multsect)
- return -EINVAL;
- save_flags(flags);
- cli();
- if (drive->special.b.set_multmode) {
- restore_flags(flags);
- return -EBUSY;
- }
- drive->mult_req = arg;
- drive->special.b.set_multmode = 1;
- restore_flags(flags);
- (void) ide_do_drive_cmd (drive, &rq, ide_wait);
- return (drive->mult_count == arg) ? 0 : -EIO;
-
- case HDIO_DRIVE_CMD:
- {
- byte args[4], *argbuf = args;
- int argsize = 4;
- if (!suser() || securelevel > 0) return -EACCES;
- if (NULL == (void *) arg) {
- err = ide_do_drive_cmd(drive, &rq, ide_wait);
- } else if (!(err = verify_area(VERIFY_READ,(void *)arg, 4))) {
- memcpy_fromfs(args, (void *)arg, 4);
- if (args[3]) {
- argsize = 4 + (SECTOR_WORDS * 4 * args[3]);
- argbuf = kmalloc(argsize, GFP_KERNEL);
- if (argbuf == NULL)
- return -ENOMEM;
- argbuf[0] = args[0];
- argbuf[1] = args[1];
- argbuf[2] = args[2];
- argbuf[3] = args[3];
- }
- if (!(err = verify_area(VERIFY_WRITE,(void *)arg, argsize))) {
- rq.buffer = argbuf;
- err = ide_do_drive_cmd(drive, &rq, ide_wait);
- memcpy_tofs((void *)arg, argbuf, argsize);
- }
- if (argsize > 4)
- kfree(argbuf);
- }
- return err;
- }
- case HDIO_SET_PIO_MODE:
- if (!suser()) return -EACCES;
- if (MINOR(inode->i_rdev) & PARTN_MASK)
- return -EINVAL;
- if (!HWIF(drive)->tuneproc)
- return -ENOSYS;
- save_flags(flags);
- cli();
- if (drive->special.b.set_tune) {
- restore_flags(flags);
- return -EBUSY;
- }
- drive->tune_req = (byte) arg;
- drive->special.b.set_tune = 1;
- restore_flags(flags);
- (void) ide_do_drive_cmd (drive, &rq, ide_wait);
- return 0;
-
- RO_IOCTLS(inode->i_rdev, arg);
-
- default:
-#ifdef CONFIG_BLK_DEV_IDECD
- if (drive->media == ide_cdrom)
- return ide_cdrom_ioctl(drive, inode, file, cmd, arg);
-#endif /* CONFIG_BLK_DEV_IDECD */
-#ifdef CONFIG_BLK_DEV_IDETAPE
- if (drive->media == ide_tape)
- return idetape_blkdev_ioctl(drive, inode, file, cmd, arg);
-#endif /* CONFIG_BLK_DEV_IDETAPE */
-#ifdef CONFIG_BLK_DEV_IDEFLOPPY
- if (drive->media == ide_floppy)
- return idefloppy_ioctl(drive, inode, file, cmd, arg);
-#endif /* CONFIG_BLK_DEV_IDEFLOPPY */
-#ifdef CONFIG_BLK_DEV_IDESCSI
- if (drive->media == ide_scsi)
- return idescsi_ioctl(drive, inode, file, cmd, arg);
-#endif /* CONFIG_BLK_DEV_IDESCSI */
- return -EPERM;
- }
-}
-
-static int ide_check_media_change (kdev_t i_rdev)
-{
- ide_drive_t *drive;
-
- if ((drive = get_info_ptr(i_rdev)) == NULL)
- return -ENODEV;
-#ifdef CONFIG_BLK_DEV_IDECD
- if (drive->media == ide_cdrom)
- return ide_cdrom_check_media_change (drive);
-#endif /* CONFIG_BLK_DEV_IDECD */
-#ifdef CONFIG_BLK_DEV_IDEFLOPPY
- if (drive->media == ide_floppy)
- return idefloppy_media_change (drive);
-#endif /* CONFIG_BLK_DEV_IDEFLOPPY */
- if (drive->removable) /* for disks */
- return 1; /* always assume it was changed */
- return 0;
-}
-
-void ide_fixstring (byte *s, const int bytecount, const int byteswap)
-{
- byte *p = s, *end = &s[bytecount & ~1]; /* bytecount must be even */
-
- if (byteswap) {
- /* convert from big-endian to host byte order */
- for (p = end ; p != s;) {
- unsigned short *pp = (unsigned short *) (p -= 2);
- *pp = ntohs(*pp);
- }
- }
-
- /* strip leading blanks */
- while (s != end && *s == ' ')
- ++s;
-
- /* compress internal blanks and strip trailing blanks */
- while (s != end && *s) {
- if (*s++ != ' ' || (s != end && *s && *s != ' '))
- *p++ = *(s-1);
- }
-
- /* wipe out trailing garbage */
- while (p != end)
- *p++ = '\0';
-}
-
-static inline void do_identify (ide_drive_t *drive, byte cmd)
-{
- int bswap;
- struct hd_driveid *id;
- unsigned long capacity, check;
-
- id = drive->id = kmalloc (SECTOR_WORDS*4, GFP_KERNEL);
- ide_input_data(drive, id, SECTOR_WORDS);/* read 512 bytes of id info */
- sti();
-
-#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
-
- /*
- * WIN_IDENTIFY returns little-endian info,
- * WIN_PIDENTIFY *usually* returns little-endian info.
- */
- bswap = 1;
- 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 = 0; /* 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;
-
-#ifdef CONFIG_BLK_DEV_IDEATAPI
- /*
- * Check for an ATAPI device
- */
- if (cmd == WIN_PIDENTIFY) {
- byte type = (id->config >> 8) & 0x1f;
- printk("%s: %s, ATAPI ", drive->name, id->model);
-#ifdef CONFIG_BLK_DEV_PROMISE
- if (HWIF(drive)->is_promise2) {
- printk(" -- not supported on 2nd Promise port\n");
- drive->present = 0;
- return;
- }
-#endif /* CONFIG_BLK_DEV_PROMISE */
- if (!drive->ide_scsi) switch (type) {
- case 0:
- if (!strstr(id->model, "oppy") && !strstr(id->model, "poyp") && !strstr(id->model, "ZIP"))
- printk("cdrom or floppy?, assuming ");
- if (drive->media != ide_cdrom && !strstr(id->model, "CD-ROM")) {
-#ifdef CONFIG_BLK_DEV_IDEFLOPPY
- printk("FLOPPY drive\n");
- drive->media = ide_floppy;
- if (idefloppy_identify_device(drive, id))
- drive->present = 1;
- return;
-#else
- printk("FLOPPY ");
- break;
-#endif /* CONFIG_BLK_DEV_IDEFLOPPY */
- }
- /* Early cdrom models used zero */
- case 5:
-#ifdef CONFIG_BLK_DEV_IDECD
- printk ("CDROM drive\n");
- drive->media = ide_cdrom;
- drive->present = 1;
- drive->removable = 1;
- return;
-#else
- printk ("CDROM ");
- break;
-#endif /* CONFIG_BLK_DEV_IDECD */
- case 1:
-#ifdef CONFIG_BLK_DEV_IDETAPE
- printk ("TAPE drive");
- if (idetape_identify_device (drive,id)) {
- drive->media = ide_tape;
- drive->present = 1;
- drive->removable = 1;
- if (drive->autotune != 2 && HWIF(drive)->dmaproc != NULL) {
- if (!HWIF(drive)->dmaproc(ide_dma_check, drive))
- printk(", DMA");
- }
- printk("\n");
- }
- else {
- drive->present = 0;
- printk ("\nide-tape: the tape is not supported by this version of the driver\n");
- }
- return;
-#else
- printk ("TAPE ");
- break;
-#endif /* CONFIG_BLK_DEV_IDETAPE */
- default:
- drive->present = 0;
- printk("Type %d - Unknown device\n", type);
- return;
- }
-#ifdef CONFIG_BLK_DEV_IDESCSI
- printk("drive - enabling SCSI emulation\n");
- drive->media = ide_scsi;
- drive->present = 1;
- idescsi_setup(drive);
-#else
- drive->present = 0;
- printk("- not supported by this kernel\n");
-#endif /* CONFIG_BLK_DEV_IDESCSI */
- return;
- }
-#endif /* CONFIG_BLK_DEV_IDEATAPI */
-
- /* check for removable disks (eg. SYQUEST), ignore 'WD' drives */
- if (id->config & (1<<7)) { /* removable disk ? */
- if (id->model[0] != 'W' || id->model[1] != 'D')
- drive->removable = 1;
- }
-
- /* SunDisk drives: treat as non-removable, force one unit */
- if (id->model[0] == 'S' && id->model[1] == 'u') {
- drive->removable = 0;
- if (drive->select.all & (1<<4)) {
- drive->present = 0;
- return;
- }
- }
-
- drive->media = ide_disk;
- /* Extract geometry if we did not already have one for the drive */
- if (!drive->present) {
- drive->present = 1;
- drive->cyl = drive->bios_cyl = id->cyls;
- drive->head = drive->bios_head = id->heads;
- drive->sect = drive->bios_sect = id->sectors;
- }
- /* Handle logical geometry translation by the drive */
- if ((id->field_valid & 1) && id->cur_cyls && id->cur_heads
- && (id->cur_heads <= 16) && id->cur_sectors)
- {
- /*
- * Extract the physical drive geometry for our use.
- * Note that we purposely do *not* update the bios info.
- * This way, programs that use it (like fdisk) will
- * still have the same logical view as the BIOS does,
- * which keeps the partition table from being screwed.
- *
- * An exception to this is the cylinder count,
- * which we reexamine later on to correct for 1024 limitations.
- */
- drive->cyl = id->cur_cyls;
- drive->head = id->cur_heads;
- drive->sect = id->cur_sectors;
-
- /* check for word-swapped "capacity" field in id information */
- capacity = drive->cyl * drive->head * drive->sect;
- check = (id->cur_capacity0 << 16) | id->cur_capacity1;
- if (check == capacity) { /* was it swapped? */
- /* yes, bring it into little-endian order: */
- id->cur_capacity0 = (capacity >> 0) & 0xffff;
- id->cur_capacity1 = (capacity >> 16) & 0xffff;
- }
- }
- /* Use physical geometry if what we have still makes no sense */
- if ((!drive->head || drive->head > 16) && id->heads && id->heads <= 16) {
- drive->cyl = id->cyls;
- drive->head = id->heads;
- drive->sect = id->sectors;
- }
-
- /* calculate drive capacity, and select LBA if possible */
- capacity = current_capacity (drive);
-
- /* Correct the number of cyls if the bios value is too small */
- if (!drive->forced_geom &&
- capacity > drive->bios_cyl * drive->bios_sect * drive->bios_head) {
- unsigned long cylsize;
- cylsize = drive->bios_sect * drive->bios_head;
- if (cylsize == 0 || capacity/cylsize > 65535) {
- drive->bios_sect = 63;
- drive->bios_head = 255;
- cylsize = 63*255;
- }
- if (capacity/cylsize > 65535)
- drive->bios_cyl = 65535;
- else
- drive->bios_cyl = capacity/cylsize;
- }
-
- if (!strncmp(id->model, "BMI ", 4) &&
- strstr(id->model, " ENHANCED IDE ") &&
- drive->select.b.lba)
- drive->no_geom = 1;
-
- printk ("%s: %.40s, %ldMB w/%dkB Cache, CHS=%d/%d/%d",
- drive->name, id->model, current_capacity(drive)/2048L, id->buf_size/2,
- drive->bios_cyl, drive->bios_head, drive->bios_sect);
-
- drive->mult_count = 0;
- if (id->max_multsect) {
- drive->mult_req = INITIAL_MULT_COUNT;
- if (drive->mult_req > id->max_multsect)
- drive->mult_req = id->max_multsect;
- if (drive->mult_req || ((id->multsect_valid & 1) && id->multsect))
- drive->special.b.set_multmode = 1;
- }
- if (drive->autotune != 2 && HWIF(drive)->dmaproc != NULL) {
- if (!(HWIF(drive)->dmaproc(ide_dma_check, drive))) {
- if ((id->field_valid & 4) && (id->dma_ultra & (id->dma_ultra >> 8) & 7))
- printk(", UDMA");
- else
- printk(", DMA");
- }
- }
- printk("\n");
-}
-
-/*
- * Delay for *at least* 50ms. As we don't know how much time is left
- * until the next tick occurs, we wait an extra tick to be safe.
- * This is used only during the probing/polling for drives at boot time.
- */
-static void delay_50ms (void)
-{
- unsigned long timer = jiffies + ((HZ + 19)/20) + 1;
- while (timer > jiffies);
-}
-
-/*
- * try_to_identify() sends an ATA(PI) IDENTIFY request to a drive
- * and waits for a response. It also monitors irqs while this is
- * happening, in hope of automatically determining which one is
- * being used by the interface.
- *
- * Returns: 0 device was identified
- * 1 device timed-out (no response to identify request)
- * 2 device aborted the command (refused to identify itself)
- */
-static int try_to_identify (ide_drive_t *drive, byte cmd)
-{
- int hd_status, rc;
- unsigned long timeout;
- unsigned long irqs_on = 0;
- int irq_off;
-
- if (!HWIF(drive)->irq) { /* already got an IRQ? */
- probe_irq_off(probe_irq_on()); /* clear dangling irqs */
- irqs_on = probe_irq_on(); /* start monitoring irqs */
- OUT_BYTE(drive->ctl,IDE_CONTROL_REG); /* enable device irq */
- }
-
- delay_50ms(); /* take a deep breath */
- if ((IN_BYTE(IDE_ALTSTATUS_REG) ^ IN_BYTE(IDE_STATUS_REG)) & ~INDEX_STAT) {
- printk("%s: probing with STATUS instead of ALTSTATUS\n", drive->name);
- hd_status = IDE_STATUS_REG; /* ancient Seagate drives */
- } else
- hd_status = IDE_ALTSTATUS_REG; /* use non-intrusive polling */
-
-#if CONFIG_BLK_DEV_PROMISE
- if (IS_PROMISE_DRIVE) {
- if (promise_cmd(drive,PROMISE_IDENTIFY)) {
- if (irqs_on)
- (void) probe_irq_off(irqs_on);
- return 1;
- }
- } else
-#endif /* CONFIG_BLK_DEV_PROMISE */
- OUT_BYTE(cmd,IDE_COMMAND_REG); /* ask drive for ID */
- timeout = ((cmd == WIN_IDENTIFY) ? WAIT_WORSTCASE : WAIT_PIDENTIFY) / 2;
- timeout += jiffies;
- do {
- if (jiffies > timeout) {
- if (irqs_on)
- (void) probe_irq_off(irqs_on);
- return 1; /* drive timed-out */
- }
- delay_50ms(); /* give drive a breather */
- } while (IN_BYTE(hd_status) & BUSY_STAT);
-
- delay_50ms(); /* wait for IRQ and DRQ_STAT */
- if (OK_STAT(GET_STAT(),DRQ_STAT,BAD_R_STAT)) {
- unsigned long flags;
- save_flags(flags);
- cli(); /* 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);
- } else
- rc = 2; /* drive refused ID */
- if (!HWIF(drive)->irq) {
- irq_off = probe_irq_off(irqs_on); /* get our irq number */
- if (irq_off > 0) {
- HWIF(drive)->irq = irq_off; /* save it for later */
- irqs_on = probe_irq_on();
- OUT_BYTE(drive->ctl|2,IDE_CONTROL_REG); /* mask device irq */
- udelay(5);
- (void) probe_irq_off(irqs_on);
- (void) probe_irq_off(probe_irq_on()); /* clear self-inflicted irq */
- (void) GET_STAT(); /* clear drive IRQ */
-
- } else { /* Mmmm.. multiple IRQs.. don't know which was ours */
- printk("%s: IRQ probe failed (%d)\n", drive->name, irq_off);
-#ifdef CONFIG_BLK_DEV_CMD640
-#ifdef CMD640_DUMP_REGS
- if (HWIF(drive)->chipset == ide_cmd640) {
- printk("%s: Hmmm.. probably a driver problem.\n", drive->name);
- CMD640_DUMP_REGS;
- }
-#endif /* CMD640_DUMP_REGS */
-#endif /* CONFIG_BLK_DEV_CMD640 */
- }
- }
- return rc;
-}
-
-/*
- * do_probe() has the difficult job of finding a drive if it exists,
- * without getting hung up if it doesn't exist, without trampling on
- * ethernet cards, and without leaving any IRQs dangling to haunt us later.
- *
- * If a drive is "known" to exist (from CMOS or kernel parameters),
- * but does not respond right away, the probe will "hang in there"
- * for the maximum wait time (about 30 seconds), otherwise it will
- * exit much more quickly.
- *
- * Returns: 0 device was identified
- * 1 device timed-out (no response to identify request)
- * 2 device aborted the command (refused to identify itself)
- * 3 bad status from device (possible for ATAPI drives)
- * 4 probe was not attempted because failure was obvious
- */
-static int do_probe (ide_drive_t *drive, byte cmd)
-{
- int rc;
- ide_hwif_t *hwif = HWIF(drive);
- unsigned long timeout;
-#ifdef CONFIG_BLK_DEV_IDEATAPI
- if (drive->present) { /* avoid waiting for inappropriate probes */
- if ((drive->media != ide_disk) && (cmd == WIN_IDENTIFY))
- return 4;
- }
-#endif /* CONFIG_BLK_DEV_IDEATAPI */
-#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
- SELECT_DRIVE(hwif,drive);
- delay_50ms();
- if (IN_BYTE(IDE_SELECT_REG) != drive->select.all && !drive->present) {
- OUT_BYTE(0xa0,IDE_SELECT_REG); /* exit with drive0 selected */
- delay_50ms(); /* allow BUSY_STAT to assert & clear */
- return 3; /* no i/f present: avoid killing ethernet cards */
- }
-
- 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) {
- printk("%s: no response (status = 0x%02x), resetting drive\n", drive->name, GET_STAT());
- delay_50ms();
- OUT_BYTE (drive->select.all, IDE_SELECT_REG);
- delay_50ms();
- OUT_BYTE(WIN_SRST, IDE_COMMAND_REG);
- timeout = jiffies;
- while ((GET_STAT() & BUSY_STAT) && jiffies < timeout + WAIT_WORSTCASE)
- 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) {
- OUT_BYTE(0xa0,IDE_SELECT_REG); /* exit with drive0 selected */
- 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);
- delay_50ms();
- OUT_BYTE(EXABYTE_ENABLE_NEST, IDE_COMMAND_REG);
- timeout = jiffies + WAIT_WORSTCASE;
- do {
- if (jiffies > timeout) {
- printk("failed (timeout)\n");
- return;
- }
- delay_50ms();
- } while (GET_STAT() & BUSY_STAT);
- 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) */
-#ifdef CONFIG_BLK_DEV_IDEATAPI
- (void) do_probe(drive, WIN_PIDENTIFY); /* look for ATAPI device */
-#endif /* CONFIG_BLK_DEV_IDEATAPI */
- }
-}
-
-/*
- * 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) */
-#ifdef CONFIG_BLK_DEV_IDEATAPI
- (void) do_probe(drive, WIN_PIDENTIFY); /* look for ATAPI device */
-#endif /* CONFIG_BLK_DEV_IDEATAPI */
- }
- 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);
- }
-#ifdef CONFIG_BLK_DEV_IDECD
- else if (drive->media == ide_cdrom) {
- printk("%s: ATAPI cdrom (?)\n", drive->name);
- }
-#endif /* CONFIG_BLK_DEV_IDECD */
- else {
- drive->present = 0; /* nuke it */
- }
- }
- return 1; /* drive was found */
-}
-
-/*
- * We query CMOS about hard disks : it could be that we have a SCSI/ESDI/etc
- * controller that is BIOS compatible with ST-506, and thus showing up in our
- * BIOS table, but not register compatible, and therefore not present in CMOS.
- *
- * Furthermore, we will assume that our ST-506 drives <if any> are the primary
- * drives in the system -- the ones reflected as drive 1 or 2. The first
- * drive is stored in the high nibble of CMOS byte 0x12, the second in the low
- * nibble. This will be either a 4 bit drive type or 0xf indicating use byte
- * 0x19 for an 8 bit type, drive 1, 0x1a for drive 2 in CMOS. A non-zero value
- * means we have an AT controller hard disk for that drive.
- *
- * Of course, there is no guarantee that either drive is actually on the
- * "primary" IDE interface, but we don't bother trying to sort that out here.
- * If a drive is not actually on the primary interface, then these parameters
- * will be ignored. This results in the user having to supply the logical
- * drive geometry as a boot parameter for each drive not on the primary i/f.
- *
- * The only "perfect" way to handle this would be to modify the setup.[cS] code
- * to do BIOS calls Int13h/Fn08h and Int13h/Fn48h to get all of the drive info
- * for us during initialization. I have the necessary docs -- any takers? -ml
- */
-static void probe_cmos_for_drives (ide_hwif_t *hwif)
-{
-#ifdef __i386__
- extern struct drive_info_struct drive_info;
- byte cmos_disks, *BIOS = (byte *) &drive_info;
- int unit;
-
-#ifdef CONFIG_BLK_DEV_PROMISE
- if (hwif->is_promise2)
- return;
-#endif /* CONFIG_BLK_DEV_PROMISE */
- outb_p(0x12,0x70); /* specify CMOS address 0x12 */
- cmos_disks = inb_p(0x71); /* read the data from 0x12 */
- /* Extract drive geometry from CMOS+BIOS if not already setup */
- for (unit = 0; unit < MAX_DRIVES; ++unit) {
- ide_drive_t *drive = &hwif->drives[unit];
- if ((cmos_disks & (0xf0 >> (unit*4))) && !drive->present && !drive->nobios) {
- drive->cyl = drive->bios_cyl = *(unsigned short *)BIOS;
- drive->head = drive->bios_head = *(BIOS+2);
- drive->sect = drive->bios_sect = *(BIOS+14);
- drive->ctl = *(BIOS+8);
- drive->present = 1;
- }
- BIOS += 16;
- }
-#endif
-}
-
-/*
- * 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;
-
- if (hwif->noprobe)
- return;
- if (hwif->io_base == HD_DATA)
- probe_cmos_for_drives (hwif);
-#if CONFIG_BLK_DEV_PROMISE
- if (!hwif->is_promise2 &&
- (check_region(hwif->io_base,8) || check_region(hwif->ctl_port,1))) {
-#else
- if (check_region(hwif->io_base,8) || check_region(hwif->ctl_port,1)) {
-#endif /* CONFIG_BLK_DEV_PROMISE */
- 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);
- } else {
- unsigned long flags;
- save_flags(flags);
-
- sti(); /* 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 && drive->media == ide_disk) {
- if ((!drive->head || drive->head > 16) && !drive->select.b.lba) {
- printk("%s: INVALID GEOMETRY: %d PHYSICAL HEADS?\n",
- drive->name, drive->head);
- drive->present = 0;
- }
- }
- if (drive->present && !hwif->present) {
- hwif->present = 1;
- request_region(hwif->io_base, 8, hwif->name);
- request_region(hwif->ctl_port, 1, hwif->name);
- }
- }
- restore_flags(flags);
- for (unit = 0; unit < MAX_DRIVES; ++unit) {
- ide_drive_t *drive = &hwif->drives[unit];
- if (drive->present && drive->media != ide_tape) {
- ide_tuneproc_t *tuneproc = HWIF(drive)->tuneproc;
- if (tuneproc != NULL && drive->autotune == 1)
- tuneproc(drive, 255); /* auto-tune PIO mode */
- }
- }
- }
-}
-
-/*
- * stridx() returns the offset of c within s,
- * or -1 if c is '\0' or not found within s.
- */
-static int stridx (const char *s, char c)
-{
- char *i = strchr(s, c);
- return (i && c) ? i - s : -1;
-}
-
-/*
- * match_parm() does parsing for ide_setup():
- *
- * 1. the first char of s must be '='.
- * 2. if the remainder matches one of the supplied keywords,
- * the index (1 based) of the keyword is negated and returned.
- * 3. if the remainder is a series of no more than max_vals numbers
- * separated by commas, the numbers are saved in vals[] and a
- * count of how many were saved is returned. Base10 is assumed,
- * and base16 is allowed when prefixed with "0x".
- * 4. otherwise, zero is returned.
- */
-static int match_parm (char *s, const char *keywords[], int vals[], int max_vals)
-{
- static const char *decimal = "0123456789";
- static const char *hex = "0123456789abcdef";
- int i, n;
-
- if (*s++ == '=') {
- /*
- * Try matching against the supplied keywords,
- * and return -(index+1) if we match one
- */
- if (keywords != NULL) {
- for (i = 0; *keywords != NULL; ++i) {
- if (!strcmp(s, *keywords++))
- return -(i+1);
- }
- }
- /*
- * Look for a series of no more than "max_vals"
- * numeric values separated by commas, in base10,
- * or base16 when prefixed with "0x".
- * Return a count of how many were found.
- */
- for (n = 0; (i = stridx(decimal, *s)) >= 0;) {
- vals[n] = i;
- while ((i = stridx(decimal, *++s)) >= 0)
- vals[n] = (vals[n] * 10) + i;
- if (*s == 'x' && !vals[n]) {
- while ((i = stridx(hex, *++s)) >= 0)
- vals[n] = (vals[n] * 0x10) + i;
- }
- if (++n == max_vals)
- break;
- if (*s == ',')
- ++s;
- }
- if (!*s)
- return n;
- }
- return 0; /* zero = nothing matched */
-}
-
-/*
- * ide_setup() gets called VERY EARLY during initialization,
- * to handle kernel "command line" strings beginning with "hdx="
- * or "ide". Here is the complete set currently supported:
- *
- * "hdx=" is recognized for all "x" from "a" to "h", such as "hdc".
- * "idex=" is recognized for all "x" from "0" to "3", such as "ide1".
- *
- * "hdx=noprobe" : drive may be present, but do not probe for it
- * "hdx=none" : drive is NOT present, ignore cmos and do not probe
- * "hdx=nowerr" : ignore the WRERR_STAT bit on this drive
- * "hdx=cdrom" : drive is present, and is a cdrom drive
- * "hdx=cyl,head,sect" : disk drive is present, with specified geometry
- * "hdx=autotune" : driver will attempt to tune interface speed
- * to the fastest PIO mode supported,
- * if possible for this drive only.
- * Not fully supported by all chipset types,
- * and quite likely to cause trouble with
- * older/odd IDE drives.
- *
- * "idebus=xx" : inform IDE driver of VESA/PCI bus speed in Mhz,
- * where "xx" is between 20 and 66 inclusive,
- * used when tuning chipset PIO modes.
- * For PCI bus, 25 is correct for a P75 system,
- * 30 is correct for P90,P120,P180 systems,
- * and 33 is used for P100,P133,P166 systems.
- * If in doubt, use idebus=33 for PCI.
- * As for VLB, it is safest to not specify it.
- *
- * "idex=noprobe" : do not attempt to access/use this interface
- * "idex=base" : probe for an interface at the addr specified,
- * where "base" is usually 0x1f0 or 0x170
- * and "ctl" is assumed to be "base"+0x206
- * "idex=base,ctl" : specify both base and ctl
- * "idex=base,ctl,irq" : specify base, ctl, and irq number
- * "idex=autotune" : driver will attempt to tune interface speed
- * to the fastest PIO mode supported,
- * for all drives on this interface.
- * Not fully supported by all chipset types,
- * and quite likely to cause trouble with
- * older/odd IDE drives.
- * "idex=noautotune" : driver will NOT attempt to tune interface speed
- * This is the default for most chipsets,
- * except the cmd640.
- * "idex=serialize" : do not overlap operations on idex and ide(x^1)
- *
- * The following are valid ONLY on ide0,
- * and the defaults for the base,ctl ports must not be altered.
- *
- * "ide0=dtc2278" : probe/support DTC2278 interface
- * "ide0=ht6560b" : probe/support HT6560B interface
- * "ide0=cmd640_vlb" : *REQUIRED* for VLB cards with the CMD640 chip
- * (not for PCI -- automatically detected)
- * "ide0=qd6580" : probe/support qd6580 interface
- * "ide0=ali14xx" : probe/support ali14xx chipsets (ALI M1439, M1443, M1445)
- * "ide0=umc8672" : probe/support umc8672 chipsets
- */
-void ide_setup (char *s)
-{
- int i, vals[3];
- ide_hwif_t *hwif;
- ide_drive_t *drive;
- unsigned int hw, unit;
- const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1);
- const char max_hwif = '0' + (MAX_HWIFS - 1);
-
- printk("ide_setup: %s", s);
- init_ide_data ();
-
- /*
- * Look for drive options: "hdx="
- */
- if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) {
- const char *hd_words[] = {"none", "noprobe", "nowerr", "cdrom",
- "serialize", "autotune", "noautotune",
- "slow", "ide-scsi", NULL};
- unit = s[2] - 'a';
- hw = unit / MAX_DRIVES;
- unit = unit % MAX_DRIVES;
- hwif = &ide_hwifs[hw];
- drive = &hwif->drives[unit];
- switch (match_parm(&s[3], hd_words, vals, 3)) {
- case -1: /* "none" */
- drive->nobios = 1; /* drop into "noprobe" */
- case -2: /* "noprobe" */
- drive->noprobe = 1;
- goto done;
- case -3: /* "nowerr" */
- drive->bad_wstat = BAD_R_STAT;
- hwif->noprobe = 0;
- goto done;
- case -4: /* "cdrom" */
- drive->present = 1;
- drive->media = ide_cdrom;
- hwif->noprobe = 0;
- goto done;
- case -5: /* "serialize" */
- printk(" -- USE \"ide%d=serialize\" INSTEAD", hw);
- goto do_serialize;
- case -6: /* "autotune" */
- drive->autotune = 1;
- goto done;
- case -7: /* "noautotune" */
- drive->autotune = 2;
- goto done;
- case -8: /* "slow" */
- drive->slow = 1;
- goto done;
- case -9: /* "ide-scsi" */
- drive->ide_scsi = 1;
- goto done;
- case 3: /* cyl,head,sect */
- drive->media = ide_disk;
- drive->cyl = drive->bios_cyl = vals[0];
- drive->head = drive->bios_head = vals[1];
- drive->sect = drive->bios_sect = vals[2];
- drive->present = 1;
- drive->forced_geom = 1;
- hwif->noprobe = 0;
- goto done;
- default:
- goto bad_option;
- }
- }
-
- if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e')
- goto bad_option;
- /*
- * Look for bus speed option: "idebus="
- */
- if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') {
- if (match_parm(&s[6], NULL, vals, 1) != 1)
- goto bad_option;
- if (vals[0] >= 20 && vals[0] <= 66)
- idebus_parameter = vals[0];
- else
- printk(" -- BAD BUS SPEED! Expected value from 20 to 66");
- goto done;
- }
- /*
- * Look for interface options: "idex="
- */
- if (s[3] >= '0' && s[3] <= max_hwif) {
- /*
- * Be VERY CAREFUL changing this: note hardcoded indexes below
- */
- const char *ide_words[] = {"noprobe", "serialize", "autotune", "noautotune",
- "qd6580", "ht6560b", "cmd640_vlb", "dtc2278", "umc8672", "ali14xx", "dc4030", NULL};
- hw = s[3] - '0';
- hwif = &ide_hwifs[hw];
- i = match_parm(&s[4], ide_words, vals, 3);
-
- /*
- * Cryptic check to ensure chipset not already set for hwif:
- */
- if (i > 0 || i <= -5) {
- if (hwif->chipset != ide_unknown)
- goto bad_option;
- if (i <= -5) {
- if (ide_hwifs[1].chipset != ide_unknown)
- goto bad_option;
- /*
- * Interface keywords work only for ide0:
- */
- if (hw != 0)
- goto bad_hwif;
- }
- }
-
- switch (i) {
-#ifdef CONFIG_BLK_DEV_PROMISE
- case -11: /* "dc4030" */
- {
- setup_dc4030(hwif);
- goto done;
- }
-#endif /* CONFIG_BLK_DEV_PROMISE */
-#ifdef CONFIG_BLK_DEV_ALI14XX
- case -10: /* "ali14xx" */
- {
- extern void init_ali14xx (void);
- init_ali14xx();
- goto done;
- }
-#endif /* CONFIG_BLK_DEV_ALI14XX */
-#ifdef CONFIG_BLK_DEV_UMC8672
- case -9: /* "umc8672" */
- {
- extern void init_umc8672 (void);
- init_umc8672();
- goto done;
- }
-#endif /* CONFIG_BLK_DEV_UMC8672 */
-#ifdef CONFIG_BLK_DEV_DTC2278
- case -8: /* "dtc2278" */
- {
- extern void init_dtc2278 (void);
- init_dtc2278();
- goto done;
- }
-#endif /* CONFIG_BLK_DEV_DTC2278 */
-#ifdef CONFIG_BLK_DEV_CMD640
- case -7: /* "cmd640_vlb" */
- {
- extern int cmd640_vlb; /* flag for cmd640.c */
- cmd640_vlb = 1;
- goto done;
- }
-#endif /* CONFIG_BLK_DEV_CMD640 */
-#ifdef CONFIG_BLK_DEV_HT6560B
- case -6: /* "ht6560b" */
- {
- extern void init_ht6560b (void);
- init_ht6560b();
- goto done;
- }
-#endif /* CONFIG_BLK_DEV_HT6560B */
-#if CONFIG_BLK_DEV_QD6580
- case -5: /* "qd6580" (has secondary i/f) */
- {
- extern void init_qd6580 (void);
- init_qd6580();
- goto done;
- }
-#endif /* CONFIG_BLK_DEV_QD6580 */
- case -4: /* "noautotune" */
- hwif->drives[0].autotune = 2;
- hwif->drives[1].autotune = 2;
- goto done;
- case -3: /* "autotune" */
- hwif->drives[0].autotune = 1;
- hwif->drives[1].autotune = 1;
- goto done;
- case -2: /* "serialize" */
- do_serialize:
- ide_hwifs[hw].serialized = 1; /* serialize */
- ide_hwifs[hw^1].serialized = 1; /* with mate */
- goto done;
-
- case -1: /* "noprobe" */
- hwif->noprobe = 1;
- goto done;
-
- case 1: /* base */
- vals[1] = vals[0] + 0x206; /* default ctl */
- case 2: /* base,ctl */
- vals[2] = 0; /* default irq = probe for it */
- case 3: /* base,ctl,irq */
- hwif->io_base = vals[0];
- hwif->ctl_port = vals[1];
- hwif->irq = vals[2];
- hwif->noprobe = 0;
- hwif->chipset = ide_generic;
- goto done;
-
- case 0: goto bad_option;
- default:
- printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n");
- return;
- }
- }
-bad_option:
- printk(" -- BAD OPTION\n");
- return;
-bad_hwif:
- printk("-- NOT SUPPORTED ON ide%d", hw);
-done:
- printk("\n");
-}
-
-/*
- * This routine is called from the partition-table code in genhd.c
- * to "convert" a drive to a logical geometry with fewer than 1024 cyls.
- *
- * The second parameter, "xparm", determines exactly how the translation
- * will be handled:
- * 0 = convert to CHS with fewer than 1024 cyls
- * using the same method as Ontrack DiskManager.
- * 1 = same as "0", plus offset everything by 63 sectors.
- * -1 = similar to "0", plus redirect sector 0 to sector 1.
- * >1 = convert to a CHS geometry with "xparm" heads.
- *
- * Returns 0 if the translation was not possible, if the device was not
- * an IDE disk drive, or if a geometry was "forced" on the commandline.
- * Returns 1 if the geometry translation was successful.
- */
-int ide_xlate_1024 (kdev_t i_rdev, int xparm, const char *msg)
-{
- ide_drive_t *drive;
- static const byte head_vals[] = {4, 8, 16, 32, 64, 128, 255, 0};
- const byte *heads = head_vals;
- unsigned long tracks;
-
- if ((drive = get_info_ptr(i_rdev)) == NULL || drive->forced_geom)
- return 0;
-
- if (xparm > 1 && xparm <= drive->bios_head && drive->bios_sect == 63)
- return 0; /* we already have a translation */
-
- printk("%s ", msg);
-
- if (drive->id) {
- drive->cyl = drive->id->cyls;
- drive->head = drive->id->heads;
- drive->sect = drive->id->sectors;
- }
- drive->bios_cyl = drive->cyl;
- drive->bios_head = drive->head;
- drive->bios_sect = drive->sect;
- drive->special.b.set_geometry = 1;
-
- tracks = drive->bios_cyl * drive->bios_head * drive->bios_sect / 63;
- drive->bios_sect = 63;
- if (xparm > 1) {
- drive->bios_head = xparm;
- drive->bios_cyl = tracks / drive->bios_head;
- } else {
- while (drive->bios_cyl >= 1024) {
- drive->bios_head = *heads;
- drive->bios_cyl = tracks / drive->bios_head;
- if (0 == *++heads)
- break;
- }
-#if FAKE_FDISK_FOR_EZDRIVE
- if (xparm == -1) {
- drive->remap_0_to_1 = 1;
- msg = "0->1";
- } else
-#endif /* FAKE_FDISK_FOR_EZDRIVE */
- if (xparm == 1) {
- drive->sect0 = 63;
- drive->bios_cyl = (tracks - 1) / drive->bios_head;
- msg = "+63";
- }
- printk("[remap %s] ", msg);
- }
- drive->part[0].nr_sects = current_capacity(drive);
- printk("[%d/%d/%d]", drive->bios_cyl, drive->bios_head, drive->bios_sect);
- return 1;
-}
-
-#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 */
-
-/*
- * 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;
-#if MAX_HWIFS > 1
- unsigned int index;
-#endif /* MAX_HWIFS > 1 */
- ide_hwgroup_t *hwgroup;
- ide_hwif_t *match = NULL;
-
- save_flags(flags);
- cli();
-
- 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;
- save_match(hwif, h, &match);
- }
- if (hwif->serialized) {
- ide_hwif_t *mate = &ide_hwifs[hwif->index^1];
- if (index == mate->index || h->irq == mate->irq)
- save_match(hwif, h, &match);
- }
- if (h->serialized) {
- ide_hwif_t *mate = &ide_hwifs[h->index^1];
- if (hwif->irq == mate->irq)
- save_match(hwif, h, &match);
- }
- }
- }
-#endif /* MAX_HWIFS > 1 */
- /*
- * If we are still without a hwgroup, then form a new one
- */
- if (match) {
- hwgroup = match->hwgroup;
- } else {
- hwgroup = kmalloc(sizeof(ide_hwgroup_t), GFP_KERNEL);
- hwgroup->hwif = hwgroup->next_hwif = hwif->next = hwif;
- hwgroup->rq = NULL;
- hwgroup->handler = NULL;
- if (hwif->drives[0].present)
- hwgroup->drive = &hwif->drives[0];
- else
- hwgroup->drive = &hwif->drives[1];
- hwgroup->poll_timeout = 0;
- hwgroup->active = 0;
- init_timer(&hwgroup->timer);
- hwgroup->timer.function = &timer_expiry;
- hwgroup->timer.data = (unsigned long) hwgroup;
- }
-
- /*
- * Allocate the irq, if not already obtained for another hwif
- */
- if (!match || match->irq != hwif->irq) {
- if (request_irq(hwif->irq, ide_intr, SA_INTERRUPT, hwif->name, hwgroup)) {
- if (!match)
- kfree(hwgroup);
- restore_flags(flags);
- return 1;
- }
- }
-
- /*
- * Everything is okay, so link us into the hwgroup
- */
- hwif->hwgroup = hwgroup;
- hwif->next = hwgroup->hwif->next;
- hwgroup->hwif->next = hwif;
-
- restore_flags(flags); /* safe now that hwif->hwgroup is set up */
-
- printk("%s at 0x%03x-0x%03x,0x%03x on irq %d", hwif->name,
- hwif->io_base, hwif->io_base+7, hwif->ctl_port, hwif->irq);
- if (match)
- printk(" (%sed with %s)", hwif->sharing_irq ? "shar" : "serializ", match->name);
- printk("\n");
- return 0;
-}
-
-static struct file_operations ide_fops = {
- NULL, /* lseek - default */
- block_read, /* read - general block-dev read */
- block_write, /* write - general block-dev write */
- NULL, /* readdir - bad */
- NULL, /* select */
- ide_ioctl, /* ioctl */
- NULL, /* mmap */
- ide_open, /* open */
- ide_release, /* release */
- block_fsync /* fsync */
- ,NULL, /* fasync */
- ide_check_media_change, /* check_media_change */
- revalidate_disk /* revalidate */
-};
-
-#ifdef CONFIG_PCI
-#if defined(CONFIG_BLK_DEV_RZ1000) || defined(CONFIG_BLK_DEV_TRITON)
-
-typedef void (ide_pci_init_proc_t)(byte, byte);
-
-/*
- * ide_probe_pci() scans PCI for a specific vendor/device function,
- * and invokes the supplied init routine for each instance detected.
- */
-static void ide_probe_pci (unsigned short vendor, unsigned short device, ide_pci_init_proc_t *init, int func_adj)
-{
- unsigned long flags;
- unsigned index;
- byte fn, bus;
-
- save_flags(flags);
- cli();
- for (index = 0; !pcibios_find_device (vendor, device, index, &bus, &fn); ++index) {
- init (bus, fn + func_adj);
- }
- restore_flags(flags);
-}
-
-#endif /* defined(CONFIG_BLK_DEV_RZ1000) || defined(CONFIG_BLK_DEV_TRITON) */
-
-static void ide_probe_promise_20246(void)
-{
- byte fn, bus;
- unsigned short io[6], count = 0;
- unsigned int reg, tmp, i;
- ide_hwif_t *hwif;
-
- memset(io, 0, 6 * sizeof(unsigned short));
- if (pcibios_find_device(PCI_VENDOR_ID_PROMISE, PCI_DEVICE_ID_PROMISE_20246, 0, &bus, &fn))
- return;
- printk("ide: Promise Technology IDE Ultra-DMA 33 on PCI bus %d function %d\n", bus, fn);
- for (reg = PCI_BASE_ADDRESS_0; reg <= PCI_BASE_ADDRESS_5; reg += 4) {
- pcibios_read_config_dword(bus, fn, reg, &tmp);
- if (tmp & PCI_BASE_ADDRESS_SPACE_IO)
- io[count++] = tmp & PCI_BASE_ADDRESS_IO_MASK;
- }
- for (i = 2; i < 4; i++) {
- hwif = ide_hwifs + i;
- if (hwif->chipset == ide_generic) {
- printk("ide%d: overridden with command line parameter\n", i);
- return;
- }
- tmp = (i - 2) * 2;
- if (!io[tmp] || !io[tmp + 1]) {
- printk("ide%d: invalid port address %x, %x -- aborting\n", i, io[tmp], io[tmp + 1]);
- return;
- }
- hwif->io_base = io[tmp];
- hwif->ctl_port = io[tmp + 1] + 2;
- hwif->noprobe = 0;
- }
-#ifdef CONFIG_BLK_DEV_TRITON
- ide_init_promise (bus, fn, &ide_hwifs[2], &ide_hwifs[3], io[4]);
-#endif /* CONFIG_BLK_DEV_TRITON */
-}
-
-#endif /* CONFIG_PCI */
-
-/*
- * ide_init_pci() finds/initializes "known" PCI IDE interfaces
- *
- * This routine should ideally be using pcibios_find_class() to find
- * all IDE interfaces, but that function causes some systems to "go weird".
- */
-static void probe_for_hwifs (void)
-{
-#ifdef CONFIG_PCI
- /*
- * Find/initialize PCI IDE interfaces
- */
- if (pcibios_present()) {
-#ifdef CONFIG_BLK_DEV_RZ1000
- ide_pci_init_proc_t init_rz1000;
- ide_probe_pci (PCI_VENDOR_ID_PCTECH, PCI_DEVICE_ID_PCTECH_RZ1000, &init_rz1000, 0);
- ide_probe_pci (PCI_VENDOR_ID_PCTECH, PCI_DEVICE_ID_PCTECH_RZ1001, &init_rz1000, 0);
-#endif /* CONFIG_BLK_DEV_RZ1000 */
-#ifdef CONFIG_BLK_DEV_TRITON
- /*
- * Apparently the BIOS32 services on Intel motherboards are
- * buggy and won't find the PCI_DEVICE_ID_INTEL_82371_1 for us.
- * So instead, we search for PCI_DEVICE_ID_INTEL_82371_0,
- * and then add 1.
- */
- ide_probe_pci (PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82371_0, &ide_init_triton, 1);
- ide_probe_pci (PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82371SB_1, &ide_init_triton, 0);
- ide_probe_pci (PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82371AB, &ide_init_triton, 0);
-#endif /* CONFIG_BLK_DEV_TRITON */
- ide_probe_promise_20246();
- }
-#endif /* CONFIG_PCI */
-#ifdef CONFIG_BLK_DEV_CMD640
- {
- extern void ide_probe_for_cmd640x (void);
- ide_probe_for_cmd640x();
- }
-#endif
-#ifdef CONFIG_BLK_DEV_PROMISE
- init_dc4030();
-#endif
-}
-
-static int hwif_init (int h)
-{
- ide_hwif_t *hwif = &ide_hwifs[h];
- void (*rfn)(void);
-
- if (!hwif->present)
- return 0;
- if (!hwif->irq) {
- if (!(hwif->irq = default_irqs[h])) {
- printk("%s: DISABLED, NO IRQ\n", hwif->name);
- return (hwif->present = 0);
- }
- }
-#ifdef CONFIG_BLK_DEV_HD
- if (hwif->irq == HD_IRQ && hwif->io_base != 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 */
- switch (hwif->major) {
- case IDE0_MAJOR: rfn = &do_ide0_request; break;
-#if MAX_HWIFS > 1
- case IDE1_MAJOR: rfn = &do_ide1_request; break;
-#endif
-#if MAX_HWIFS > 2
- case IDE2_MAJOR: rfn = &do_ide2_request; break;
-#endif
-#if MAX_HWIFS > 3
- case IDE3_MAJOR: rfn = &do_ide3_request; break;
-#endif
- default:
- printk("%s: request_fn NOT DEFINED\n", hwif->name);
- return (hwif->present = 0);
- }
- if (register_blkdev (hwif->major, hwif->name, &ide_fops)) {
- printk("%s: UNABLE TO GET MAJOR NUMBER %d\n", hwif->name, hwif->major);
- } else if (init_irq (hwif)) {
- printk("%s: UNABLE TO GET IRQ %d\n", hwif->name, hwif->irq);
- (void) unregister_blkdev (hwif->major, hwif->name);
- } else {
- init_gendisk(hwif);
- blk_dev[hwif->major].request_fn = rfn;
- read_ahead[hwif->major] = 8; /* (4kB) */
- hwif->present = 1; /* success */
- }
- return hwif->present;
-}
-
-/*
- * This is gets invoked once during initialization, to set *everything* up
- */
-int ide_init (void)
-{
- int index;
-
- init_ide_data ();
- /*
- * Probe for special "known" interface chipsets
- */
- probe_for_hwifs ();
-
- /*
- * Probe for drives in the usual way.. CMOS/BIOS, then poke at ports
- */
- for (index = 0; index < MAX_HWIFS; ++index)
- probe_hwif (&ide_hwifs[index]);
- for (index = 0; index < MAX_HWIFS; ++index)
- hwif_init (index);
-
-#ifdef CONFIG_BLK_DEV_IDETAPE
- idetape_register_chrdev(); /* Register character device interface to the ide tape */
-#endif /* CONFIG_BLK_DEV_IDETAPE */
-
- return 0;
-}
-
-#ifdef CONFIG_BLK_DEV_IDE_PCMCIA
-int ide_register(int io_base, int ctl_port, int irq)
-{
- int index, i, rc = -1;
- ide_hwif_t *hwif;
- ide_drive_t *drive;
- unsigned long flags;
-
- save_flags(flags);
- cli();
- for (index = 0; index < MAX_HWIFS; ++index) {
- hwif = &ide_hwifs[index];
- if (hwif->present) {
- if (hwif->io_base == io_base || hwif->ctl_port == ctl_port)
- break; /* this ide port already exists */
- } else {
- hwif->io_base = io_base;
- hwif->ctl_port = ctl_port;
- hwif->irq = irq;
- hwif->noprobe = 0;
- probe_hwif(hwif);
- if (!hwif_init(index))
- break;
- for (i = 0; i < hwif->gd->nr_real; i++) {
- drive = &hwif->drives[i];
- revalidate_disk(MKDEV(hwif->major, i<<PARTN_BITS));
-#ifdef CONFIG_BLK_DEV_IDECD
- if (drive->present && drive->media == ide_cdrom)
- ide_cdrom_setup(drive);
-#endif /* CONFIG_BLK_DEV_IDECD */
- }
- rc = index;
- break;
- }
- }
- restore_flags(flags);
- return rc;
-}
-
-void ide_unregister (unsigned int index)
-{
- struct gendisk *gd, **gdp;
- ide_hwif_t *hwif, *g;
- ide_hwgroup_t *hwgroup;
- int irq_count = 0;
- unsigned long flags;
-
- if (index >= MAX_HWIFS)
- return;
- save_flags(flags);
- cli();
- hwif = &ide_hwifs[index];
- if (!hwif->present || hwif->drives[0].busy || hwif->drives[1].busy) {
- restore_flags(flags);
- return;
- }
- hwif->present = 0;
- hwgroup = hwif->hwgroup;
-
- /*
- * free the irq if we were the only hwif using it
- */
- g = hwgroup->hwif;
- do {
- if (g->irq == hwif->irq)
- ++irq_count;
- g = g->next;
- } while (g != hwgroup->hwif);
- if (irq_count == 1)
- free_irq(hwif->irq, hwgroup);
-
- /*
- * Note that we only release the standard ports,
- * and do not even try to handle any extra ports
- * allocated for weird IDE interface chipsets.
- */
- release_region(hwif->io_base, 8);
- release_region(hwif->ctl_port, 1);
-
- /*
- * Remove us from the hwgroup, and free
- * the hwgroup if we were the only member
- */
- while (hwgroup->hwif->next != hwif)
- hwgroup->hwif = hwgroup->hwif->next;
- hwgroup->hwif->next = hwif->next;
- if (hwgroup->hwif == hwif)
- hwgroup->hwif = hwif->next;
- if (hwgroup->next_hwif == hwif)
- hwgroup->next_hwif = hwif->next;
- if (hwgroup->hwif == hwif)
- kfree(hwgroup);
-
- /*
- * Remove us from the kernel's knowledge
- */
- unregister_blkdev(hwif->major, hwif->name);
- kfree(blksize_size[hwif->major]);
- blk_dev[hwif->major].request_fn = NULL;
- blksize_size[hwif->major] = NULL;
- for (gdp = &gendisk_head; *gdp; gdp = &((*gdp)->next))
- if (*gdp == hwif->gd)
- break;
- if (*gdp == NULL)
- printk("gd not in disk chain!\n");
- else {
- gd = *gdp; *gdp = gd->next;
- kfree(gd->sizes);
- kfree(gd->part);
- kfree(gd);
- }
- init_hwif_data (index); /* restore hwif data to pristine status */
- restore_flags(flags);
-}
-#endif /* CONFIG_BLK_DEV_IDE_PCMCIA */