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authorAdrian Bunk <bunk@stusta.de>2007-07-31 00:38:19 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-07-31 15:39:39 -0700
commit99eb8a550dbccc0e1f6c7e866fe421810e0585f6 (patch)
tree130c6e3338a0655ba74355eba83afab9261e1ed0 /drivers/acorn/block
parent0d0ed42e5ca2e22465c591341839c18025748fe8 (diff)
Remove the arm26 port
The arm26 port has been in a state where it was far from even compiling for quite some time. Ian Molton agreed with the removal. Signed-off-by: Adrian Bunk <bunk@stusta.de> Cc: Ian Molton <spyro@f2s.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/acorn/block')
-rw-r--r--drivers/acorn/block/Kconfig36
-rw-r--r--drivers/acorn/block/Makefile9
-rw-r--r--drivers/acorn/block/fd1772.c1604
-rw-r--r--drivers/acorn/block/fd1772dma.S100
-rw-r--r--drivers/acorn/block/mfm.S162
-rw-r--r--drivers/acorn/block/mfmhd.c1385
6 files changed, 0 insertions, 3296 deletions
diff --git a/drivers/acorn/block/Kconfig b/drivers/acorn/block/Kconfig
deleted file mode 100644
index a0ff25ea439..00000000000
--- a/drivers/acorn/block/Kconfig
+++ /dev/null
@@ -1,36 +0,0 @@
-#
-# Block device driver configuration
-#
-
-menu "Acorn-specific block devices"
- depends on ARCH_ARC || ARCH_A5K
-
-config BLK_DEV_FD1772
- tristate "Old Archimedes floppy (1772) support"
- depends on ARCH_ARC || ARCH_A5K
- help
- Support the floppy drive on the Acorn Archimedes (A300, A4x0, A540,
- R140 and R260) series of computers; it supports only 720K floppies
- at the moment. If you don't have one of these machines just answer
- N.
-
-config BLK_DEV_MFM
- tristate "MFM harddisk support"
- depends on ARCH_ARC || ARCH_A5K
- help
- Support the MFM hard drives on the Acorn Archimedes both
- on-board the A4x0 motherboards and via the Acorn MFM podules.
- Drives up to 64MB are supported. If you haven't got one of these
- machines or drives just say N.
-
-config BLK_DEV_MFM_AUTODETECT
- bool "Autodetect hard drive geometry"
- depends on BLK_DEV_MFM
- help
- If you answer Y, the MFM code will attempt to automatically detect
- the cylinders/heads/sectors count on your hard drive. WARNING: This
- sometimes doesn't work and it also does some dodgy stuff which
- potentially might damage your drive.
-
-endmenu
-
diff --git a/drivers/acorn/block/Makefile b/drivers/acorn/block/Makefile
deleted file mode 100644
index 38a9afe8e03..00000000000
--- a/drivers/acorn/block/Makefile
+++ /dev/null
@@ -1,9 +0,0 @@
-#
-# Makefile for the Acorn block device drivers.
-#
-
-fd1772_mod-objs := fd1772.o fd1772dma.o
-mfmhd_mod-objs := mfmhd.o mfm.o
-
-obj-$(CONFIG_BLK_DEV_FD1772) += fd1772_mod.o
-obj-$(CONFIG_BLK_DEV_MFM) += mfmhd_mod.o
diff --git a/drivers/acorn/block/fd1772.c b/drivers/acorn/block/fd1772.c
deleted file mode 100644
index d7e18ce8dad..00000000000
--- a/drivers/acorn/block/fd1772.c
+++ /dev/null
@@ -1,1604 +0,0 @@
-/*
- * linux/kernel/arch/arm/drivers/block/fd1772.c
- * Based on ataflop.c in the m68k Linux
- * Copyright (C) 1993 Greg Harp
- * Atari Support by Bjoern Brauel, Roman Hodek
- * Archimedes Support by Dave Gilbert (linux@treblig.org)
- *
- * Big cleanup Sep 11..14 1994 Roman Hodek:
- * - Driver now works interrupt driven
- * - Support for two drives; should work, but I cannot test that :-(
- * - Reading is done in whole tracks and buffered to speed up things
- * - Disk change detection and drive deselecting after motor-off
- * similar to TOS
- * - Autodetection of disk format (DD/HD); untested yet, because I
- * don't have an HD drive :-(
- *
- * Fixes Nov 13 1994 Martin Schaller:
- * - Autodetection works now
- * - Support for 5 1/4" disks
- * - Removed drive type (unknown on atari)
- * - Do seeks with 8 Mhz
- *
- * Changes by Andreas Schwab:
- * - After errors in multiple read mode try again reading single sectors
- * (Feb 1995):
- * - Clean up error handling
- * - Set blk_size for proper size checking
- * - Initialize track register when testing presence of floppy
- * - Implement some ioctl's
- *
- * Changes by Torsten Lang:
- * - When probing the floppies we should add the FDC1772CMDADD_H flag since
- * the FDC1772 will otherwise wait forever when no disk is inserted...
- *
- * Things left to do:
- * - Formatting
- * - Maybe a better strategy for disk change detection (does anyone
- * know one?)
- * - There are some strange problems left: The strangest one is
- * that, at least on my TT (4+4MB), the first 2 Bytes of the last
- * page of the TT-Ram (!) change their contents (some bits get
- * set) while a floppy DMA is going on. But there are no accesses
- * to these memory locations from the kernel... (I tested that by
- * making the page read-only). I cannot explain what's going on...
- * - Sometimes the drive-change-detection stops to work. The
- * function is still called, but the WP bit always reads as 0...
- * Maybe a problem with the status reg mode or a timing problem.
- * Note 10/12/94: The change detection now seems to work reliably.
- * There is no proof, but I've seen no hang for a long time...
- *
- * ARCHIMEDES changes: (gilbertd@cs.man.ac.uk)
- * 26/12/95 - Changed all names starting with FDC to FDC1772
- * Removed all references to clock speed of FDC - we're stuck with 8MHz
- * Modified disk_type structure to remove HD formats
- *
- * 7/ 1/96 - Wrote FIQ code, removed most remaining atariisms
- *
- * 13/ 1/96 - Well I think its read a single sector; but there is a problem
- * fd_rwsec_done which is called in FIQ mode starts another transfer
- * off (in fd_rwsec) while still in FIQ mode. Because its still in
- * FIQ mode it can't service the DMA and loses data. So need to
- * heavily restructure.
- * 14/ 1/96 - Found that the definitions of the register numbers of the
- * FDC were multiplied by 2 in the header for the 16bit words
- * of the atari so half the writes were going in the wrong place.
- * Also realised that the FIQ entry didn't make any attempt to
- * preserve registers or return correctly; now in assembler.
- *
- * 11/ 2/96 - Hmm - doesn't work on real machine. Auto detect doesn't
- * and hacking that past seems to wait forever - check motor
- * being turned on.
- *
- * 17/ 2/96 - still having problems - forcing track to -1 when selecting
- * new drives seems to allow it to read first few sectors
- * but then we get solid hangs at apparently random places
- * which change depending what is happening.
- *
- * 9/ 3/96 - Fiddled a lot of stuff around to move to kernel 1.3.35
- * A lot of fiddling in DMA stuff. Having problems with it
- * constnatly thinking its timeing out. Ah - its timeout
- * was set to (6*HZ) rather than jiffies+(6*HZ). Now giving
- * duff data!
- *
- * 5/ 4/96 - Made it use the new IOC_ macros rather than *ioc
- * Hmm - giving unexpected FIQ and then timeouts
- * 18/ 8/96 - Ran through indent -kr -i8
- * Some changes to disc change detect; don't know how well it
- * works.
- * 24/ 8/96 - Put all the track buffering code back in from the atari
- * code - I wonder if it will still work... No :-)
- * Still works if I turn off track buffering.
- * 25/ 8/96 - Changed the timer expires that I'd added back to be
- * jiffies + ....; and it all sprang to life! Got 2.8K/sec
- * off a cp -r of a 679K disc (showed 94% cpu usage!)
- * (PC gets 14.3K/sec - 0% CPU!) Hmm - hard drive corrupt!
- * Also perhaps that compile was with cache off.
- * changed cli in fd_readtrack_check to cliIF
- * changed vmallocs to kmalloc (whats the difference!!)
- * Removed the busy wait loop in do_fd_request and replaced
- * by a routine on tq_immediate; only 11% cpu on a dd off the
- * raw disc - but the speed is the same.
- * 1/ 9/96 - Idea (failed!) - set the 'disable spin-up sequence'
- * when we read the track if we know the motor is on; didn't
- * help - perhaps we have to do it in stepping as well.
- * Nope. Still doesn't help.
- * Hmm - what seems to be happening is that fd_readtrack_check
- * is never getting called. Its job is to terminate the read
- * just after we think we should have got the data; otherwise
- * the fdc takes 1 second to timeout; which is what's happening
- * Now I can see 'readtrack_timer' being set (which should do the
- * call); but it never seems to be called - hmm!
- * OK - I've moved the check to my tq_immediate code -
- * and it WORKS! 13.95K/second at 19% CPU.
- * I wish I knew why that timer didn't work.....
- *
- * 16/11/96 - Fiddled and frigged for 2.0.18
- *
- * DAG 30/01/99 - Started frobbing for 2.2.1
- * DAG 20/06/99 - A little more frobbing:
- * Included include/asm/uaccess.h for get_user/put_user
- *
- * DAG 1/09/00 - Dusted off for 2.4.0-test7
- * MAX_SECTORS was name clashing so it is now FD1772_...
- * Minor parameter, name layouts for 2.4.x differences
- */
-
-#include <linux/sched.h>
-#include <linux/fs.h>
-#include <linux/fcntl.h>
-#include <linux/slab.h>
-#include <linux/kernel.h>
-#include <linux/interrupt.h>
-#include <linux/timer.h>
-#include <linux/workqueue.h>
-#include <linux/fd.h>
-#include <linux/fd1772.h>
-#include <linux/errno.h>
-#include <linux/types.h>
-#include <linux/delay.h>
-#include <linux/mm.h>
-#include <linux/bitops.h>
-
-#include <asm/arch/oldlatches.h>
-#include <asm/dma.h>
-#include <asm/hardware.h>
-#include <asm/hardware/ioc.h>
-#include <asm/io.h>
-#include <asm/irq.h>
-#include <asm/mach-types.h>
-#include <asm/pgtable.h>
-#include <asm/system.h>
-#include <asm/uaccess.h>
-
-
-/* Note: FD_MAX_UNITS could be redefined to 2 for the Atari (with
- * little additional rework in this file). But I'm not yet sure if
- * some other code depends on the number of floppies... (It is defined
- * in a public header!)
- */
-#if 0
-#undef FD_MAX_UNITS
-#define FD_MAX_UNITS 2
-#endif
-
-/* Ditto worries for Arc - DAG */
-#define FD_MAX_UNITS 4
-#define TRACKBUFFER 0
-/*#define DEBUG*/
-
-#ifdef DEBUG
-#define DPRINT(a) printk a
-#else
-#define DPRINT(a)
-#endif
-
-static struct request_queue *floppy_queue;
-
-#define MAJOR_NR FLOPPY_MAJOR
-#define FLOPPY_DMA 0
-#define DEVICE_NAME "floppy"
-#define QUEUE (floppy_queue)
-#define CURRENT elv_next_request(floppy_queue)
-
-/* Disk types: DD */
-static struct archy_disk_type {
- const char *name;
- unsigned spt; /* sectors per track */
- unsigned blocks; /* total number of blocks */
- unsigned stretch; /* track doubling ? */
-} disk_type[] = {
-
- { "d360", 9, 720, 0 }, /* 360kB diskette */
- { "D360", 9, 720, 1 }, /* 360kb in 720kb drive */
- { "D720", 9, 1440, 0 }, /* 720kb diskette (DD) */
- /*{ "D820", 10,1640, 0}, *//* DD disk with 82 tracks/10 sectors
- - DAG - can't see how type detect can distinguish this
- from 720K until it reads block 4 by which time its too late! */
-};
-
-#define NUM_DISK_TYPES (sizeof(disk_type)/sizeof(*disk_type))
-
-/*
- * Maximum disk size (in kilobytes). This default is used whenever the
- * current disk size is unknown.
- */
-#define MAX_DISK_SIZE 720
-
-static struct gendisk *disks[FD_MAX_UNIT];
-
-/* current info on each unit */
-static struct archy_floppy_struct {
- int connected; /* !=0 : drive is connected */
- int autoprobe; /* !=0 : do autoprobe */
-
- struct archy_disk_type *disktype; /* current type of disk */
-
- int track; /* current head position or -1
- * if unknown */
- unsigned int steprate; /* steprate setting */
- unsigned int wpstat; /* current state of WP signal
- * (for disk change detection) */
-} unit[FD_MAX_UNITS];
-
-/* DAG: On Arc we spin on a flag being cleared by fdc1772_comendhandler which
- is an assembler routine */
-extern void fdc1772_comendhandler(void); /* Actually doens't have these parameters - see fd1772.S */
-extern volatile int fdc1772_comendstatus;
-extern volatile int fdc1772_fdc_int_done;
-
-#define FDC1772BASE ((0x210000>>2)|0x80000000)
-
-#define FDC1772_READ(reg) inb(FDC1772BASE+(reg/2))
-
-/* DAG: You wouldn't be silly to ask why FDC1772_WRITE is a function rather
- than the #def below - well simple - the #def won't compile - and I
- don't understand why (__outwc not defined) */
-/* NOTE: Reg is 0,2,4,6 as opposed to 0,1,2,3 or 0,4,8,12 to keep compatibility
- with the ST version of fd1772.h */
-/*#define FDC1772_WRITE(reg,val) outw(val,(reg+FDC1772BASE)); */
-void FDC1772_WRITE(int reg, unsigned char val)
-{
- if (reg == FDC1772REG_CMD) {
- DPRINT(("FDC1772_WRITE new command 0x%x @ %d\n", val,jiffies));
- if (fdc1772_fdc_int_done) {
- DPRINT(("FDC1772_WRITE: Hmm fdc1772_fdc_int_done true - resetting\n"));
- fdc1772_fdc_int_done = 0;
- };
- };
- outb(val, (reg / 2) + FDC1772BASE);
-};
-
-#define FD1772_MAX_SECTORS 22
-
-unsigned char *DMABuffer; /* buffer for writes */
-/*static unsigned long PhysDMABuffer; *//* physical address */
-/* DAG: On Arc we just go straight for the DMA buffer */
-#define PhysDMABuffer DMABuffer
-
-#ifdef TRACKBUFFER
-unsigned char *TrackBuffer; /* buffer for reads */
-#define PhysTrackBuffer TrackBuffer /* physical address */
-static int BufferDrive, BufferSide, BufferTrack;
-static int read_track; /* non-zero if we are reading whole tracks */
-
-#define SECTOR_BUFFER(sec) (TrackBuffer + ((sec)-1)*512)
-#define IS_BUFFERED(drive,side,track) \
- (BufferDrive == (drive) && BufferSide == (side) && BufferTrack == (track))
-#endif
-
-/*
- * These are global variables, as that's the easiest way to give
- * information to interrupts. They are the data used for the current
- * request.
- */
-static int SelectedDrive = 0;
-static int ReqCmd, ReqBlock;
-static int ReqSide, ReqTrack, ReqSector, ReqCnt;
-static int HeadSettleFlag = 0;
-static unsigned char *ReqData, *ReqBuffer;
-static int MotorOn = 0, MotorOffTrys;
-
-/* Synchronization of FDC1772 access. */
-static volatile int fdc_busy = 0;
-static DECLARE_WAIT_QUEUE_HEAD(fdc_wait);
-
-
-/* long req'd for set_bit --RR */
-static unsigned long changed_floppies = 0xff, fake_change = 0;
-#define CHECK_CHANGE_DELAY HZ/2
-
-/* DAG - increased to 30*HZ - not sure if this is the correct thing to do */
-#define FD_MOTOR_OFF_DELAY (10*HZ)
-#define FD_MOTOR_OFF_MAXTRY (10*20)
-
-#define FLOPPY_TIMEOUT (6*HZ)
-#define RECALIBRATE_ERRORS 4 /* After this many errors the drive
- * will be recalibrated. */
-#define MAX_ERRORS 8 /* After this many errors the driver
- * will give up. */
-
-#define START_MOTOR_OFF_TIMER(delay) \
- do { \
- motor_off_timer.expires = jiffies + (delay); \
- add_timer( &motor_off_timer ); \
- MotorOffTrys = 0; \
- } while(0)
-
-#define START_CHECK_CHANGE_TIMER(delay) \
- do { \
- mod_timer(&fd_timer, jiffies + (delay)); \
- } while(0)
-
-#define START_TIMEOUT() \
- do { \
- mod_timer(&timeout_timer, jiffies+FLOPPY_TIMEOUT); \
- } while(0)
-
-#define STOP_TIMEOUT() \
- do { \
- del_timer( &timeout_timer ); \
- } while(0)
-
-#define ENABLE_IRQ() enable_irq(FIQ_FD1772+64);
-
-#define DISABLE_IRQ() disable_irq(FIQ_FD1772+64);
-
-static void fd1772_checkint(void);
-
-DECLARE_WORK(fd1772_tq, (void *)fd1772_checkint, NULL);
-/*
- * The driver is trying to determine the correct media format
- * while Probing is set. fd_rwsec_done() clears it after a
- * successful access.
- */
-static int Probing = 0;
-
-/* This flag is set when a dummy seek is necessary to make the WP
- * status bit accessible.
- */
-static int NeedSeek = 0;
-
-
-/***************************** Prototypes *****************************/
-
-static void fd_select_side(int side);
-static void fd_select_drive(int drive);
-static void fd_deselect(void);
-static void fd_motor_off_timer(unsigned long dummy);
-static void check_change(unsigned long dummy);
-static void floppy_irqconsequencehandler(void);
-static void fd_error(void);
-static void do_fd_action(int drive);
-static void fd_calibrate(void);
-static void fd_calibrate_done(int status);
-static void fd_seek(void);
-static void fd_seek_done(int status);
-static void fd_rwsec(void);
-#ifdef TRACKBUFFER
-static void fd_readtrack_check( unsigned long dummy );
-#endif
-static void fd_rwsec_done(int status);
-static void fd_times_out(unsigned long dummy);
-static void finish_fdc(void);
-static void finish_fdc_done(int dummy);
-static void floppy_off(unsigned int nr);
-static void setup_req_params(int drive);
-static void redo_fd_request(void);
-static int fd_ioctl(struct inode *inode, struct file *filp, unsigned int
- cmd, unsigned long param);
-static void fd_probe(int drive);
-static int fd_test_drive_present(int drive);
-static void config_types(void);
-static int floppy_open(struct inode *inode, struct file *filp);
-static int floppy_release(struct inode *inode, struct file *filp);
-static void do_fd_request(struct request_queue *);
-
-/************************* End of Prototypes **************************/
-
-static DEFINE_TIMER(motor_off_timer, fd_motor_off_timer, 0, 0);
-
-#ifdef TRACKBUFFER
-static DEFINE_TIMER(readtrack_timer, fd_readtrack_check, 0, 0);
-#endif
-
-static DEFINE_TIMER(timeout_timer, fd_times_out, 0, 0);
-
-static DEFINE_TIMER(fd_timer, check_change, 0, 0);
-
-/* DAG: Haven't got a clue what this is? */
-int stdma_islocked(void)
-{
- return 0;
-};
-
-/* Select the side to use. */
-
-static void fd_select_side(int side)
-{
- oldlatch_aupdate(LATCHA_SIDESEL, side ? 0 : LATCHA_SIDESEL);
-}
-
-
-/* Select a drive, update the FDC1772's track register
- */
-
-static void fd_select_drive(int drive)
-{
-#ifdef DEBUG
- printk("fd_select_drive:%d\n", drive);
-#endif
- /* Hmm - nowhere do we seem to turn the motor on - I'm going to do it here! */
- oldlatch_aupdate(LATCHA_MOTOR | LATCHA_INUSE, 0);
-
- if (drive == SelectedDrive)
- return;
-
- oldlatch_aupdate(LATCHA_FDSELALL, 0xf - (1 << drive));
-
- /* restore track register to saved value */
- FDC1772_WRITE(FDC1772REG_TRACK, unit[drive].track);
- udelay(25);
-
- SelectedDrive = drive;
-}
-
-
-/* Deselect both drives. */
-
-static void fd_deselect(void)
-{
- unsigned long flags;
-
- DPRINT(("fd_deselect\n"));
-
- oldlatch_aupdate(LATCHA_FDSELALL | LATCHA_MOTOR | LATCHA_INUSE, 0xf | LATCHA_MOTOR | LATCHA_INUSE);
-
- SelectedDrive = -1;
-}
-
-
-/* This timer function deselects the drives when the FDC1772 switched the
- * motor off. The deselection cannot happen earlier because the FDC1772
- * counts the index signals, which arrive only if one drive is selected.
- */
-
-static void fd_motor_off_timer(unsigned long dummy)
-{
- unsigned long flags;
- unsigned char status;
- int delay;
-
- del_timer(&motor_off_timer);
-
- if (SelectedDrive < 0)
- /* no drive selected, needn't deselect anyone */
- return;
-
- save_flags(flags);
- cli();
-
- if (fdc_busy) /* was stdma_islocked */
- goto retry;
-
- status = FDC1772_READ(FDC1772REG_STATUS);
-
- if (!(status & 0x80)) {
- /*
- * motor already turned off by FDC1772 -> deselect drives
- * In actual fact its this deselection which turns the motor
- * off on the Arc, since the motor control is actually on
- * Latch A
- */
- DPRINT(("fdc1772: deselecting in fd_motor_off_timer\n"));
- fd_deselect();
- MotorOn = 0;
- restore_flags(flags);
- return;
- }
- /* not yet off, try again */
-
-retry:
- restore_flags(flags);
- /* Test again later; if tested too often, it seems there is no disk
- * in the drive and the FDC1772 will leave the motor on forever (or,
- * at least until a disk is inserted). So we'll test only twice
- * per second from then on...
- */
- delay = (MotorOffTrys < FD_MOTOR_OFF_MAXTRY) ?
- (++MotorOffTrys, HZ / 20) : HZ / 2;
- START_MOTOR_OFF_TIMER(delay);
-}
-
-
-/* This function is repeatedly called to detect disk changes (as good
- * as possible) and keep track of the current state of the write protection.
- */
-
-static void check_change(unsigned long dummy)
-{
- static int drive = 0;
-
- unsigned long flags;
- int stat;
-
- if (fdc_busy)
- return; /* Don't start poking about if the fdc is busy */
-
- return; /* let's just forget it for the mo DAG */
-
- if (++drive > 1 || !unit[drive].connected)
- drive = 0;
-
- save_flags(flags);
- cli();
-
- if (!stdma_islocked()) {
- stat = !!(FDC1772_READ(FDC1772REG_STATUS) & FDC1772STAT_WPROT);
-
- /* The idea here is that if the write protect line has changed then
- the disc must have changed */
- if (stat != unit[drive].wpstat) {
- DPRINT(("wpstat[%d] = %d\n", drive, stat));
- unit[drive].wpstat = stat;
- set_bit(drive, &changed_floppies);
- }
- }
- restore_flags(flags);
-
- START_CHECK_CHANGE_TIMER(CHECK_CHANGE_DELAY);
-}
-
-
-/* Handling of the Head Settling Flag: This flag should be set after each
- * seek operation, because we don't use seeks with verify.
- */
-
-static inline void set_head_settle_flag(void)
-{
- HeadSettleFlag = FDC1772CMDADD_E;
-}
-
-static inline int get_head_settle_flag(void)
-{
- int tmp = HeadSettleFlag;
- HeadSettleFlag = 0;
- return (tmp);
-}
-
-
-
-
-/* General Interrupt Handling */
-
-static inline void copy_buffer(void *from, void *to)
-{
- ulong *p1 = (ulong *) from, *p2 = (ulong *) to;
- int cnt;
-
- for (cnt = 512 / 4; cnt; cnt--)
- *p2++ = *p1++;
-}
-
-static void (*FloppyIRQHandler) (int status) = NULL;
-
-static void floppy_irqconsequencehandler(void)
-{
- unsigned char status;
- void (*handler) (int);
-
- fdc1772_fdc_int_done = 0;
-
- handler = FloppyIRQHandler;
- FloppyIRQHandler = NULL;
-
- if (handler) {
- nop();
- status = (unsigned char) fdc1772_comendstatus;
- DPRINT(("FDC1772 irq, status = %02x handler = %08lx\n", (unsigned int) status, (unsigned long) handler));
- handler(status);
- } else {
- DPRINT(("FDC1772 irq, no handler status=%02x\n", fdc1772_comendstatus));
- }
- DPRINT(("FDC1772 irq: end of floppy_irq\n"));
-}
-
-
-/* Error handling: If some error happened, retry some times, then
- * recalibrate, then try again, and fail after MAX_ERRORS.
- */
-
-static void fd_error(void)
-{
- printk("FDC1772: fd_error\n");
- /*panic("fd1772: fd_error"); *//* DAG tmp */
- if (!CURRENT)
- return;
- CURRENT->errors++;
- if (CURRENT->errors >= MAX_ERRORS) {
- printk("fd%d: too many errors.\n", SelectedDrive);
- end_request(CURRENT, 0);
- } else if (CURRENT->errors == RECALIBRATE_ERRORS) {
- printk("fd%d: recalibrating\n", SelectedDrive);
- if (SelectedDrive != -1)
- unit[SelectedDrive].track = -1;
- }
- redo_fd_request();
-}
-
-
-
-#define SET_IRQ_HANDLER(proc) do { FloppyIRQHandler = (proc); } while(0)
-
-
-/* do_fd_action() is the general procedure for a fd request: All
- * required parameter settings (drive select, side select, track
- * position) are checked and set if needed. For each of these
- * parameters and the actual reading or writing exist two functions:
- * one that starts the setting (or skips it if possible) and one
- * callback for the "done" interrupt. Each done func calls the next
- * set function to propagate the request down to fd_rwsec_done().
- */
-
-static void do_fd_action(int drive)
-{
- struct request *req;
- DPRINT(("do_fd_action unit[drive].track=%d\n", unit[drive].track));
-
-#ifdef TRACKBUFFER
-repeat:
-
- if (IS_BUFFERED( drive, ReqSide, ReqTrack )) {
- req = CURRENT;
- if (ReqCmd == READ) {
- copy_buffer( SECTOR_BUFFER(ReqSector), ReqData );
- if (++ReqCnt < req->current_nr_sectors) {
- /* read next sector */
- setup_req_params( drive );
- goto repeat;
- } else {
- /* all sectors finished */
- req->nr_sectors -= req->current_nr_sectors;
- req->sector += req->current_nr_sectors;
- end_request(req, 1);
- redo_fd_request();
- return;
- }
- } else {
- /* cmd == WRITE, pay attention to track buffer
- * consistency! */
- copy_buffer( ReqData, SECTOR_BUFFER(ReqSector) );
- }
- }
-#endif
-
- if (SelectedDrive != drive) {
- /*unit[drive].track = -1; DAG */
- fd_select_drive(drive);
- };
-
-
- if (unit[drive].track == -1)
- fd_calibrate();
- else if (unit[drive].track != ReqTrack << unit[drive].disktype->stretch)
- fd_seek();
- else
- fd_rwsec();
-}
-
-
-/* Seek to track 0 if the current track is unknown */
-
-static void fd_calibrate(void)
-{
- DPRINT(("fd_calibrate\n"));
- if (unit[SelectedDrive].track >= 0) {
- fd_calibrate_done(0);
- return;
- }
- DPRINT(("fd_calibrate (after track compare)\n"));
- SET_IRQ_HANDLER(fd_calibrate_done);
- /* we can't verify, since the speed may be incorrect */
- FDC1772_WRITE(FDC1772REG_CMD, FDC1772CMD_RESTORE | unit[SelectedDrive].steprate);
-
- NeedSeek = 1;
- MotorOn = 1;
- START_TIMEOUT();
- /* wait for IRQ */
-}
-
-
-static void fd_calibrate_done(int status)
-{
- DPRINT(("fd_calibrate_done()\n"));
- STOP_TIMEOUT();
-
- /* set the correct speed now */
- if (status & FDC1772STAT_RECNF) {
- printk("fd%d: restore failed\n", SelectedDrive);
- fd_error();
- } else {
- unit[SelectedDrive].track = 0;
- fd_seek();
- }
-}
-
-
-/* Seek the drive to the requested track. The drive must have been
- * calibrated at some point before this.
- */
-
-static void fd_seek(void)
-{
- unsigned long flags;
- DPRINT(("fd_seek() to track %d (unit[SelectedDrive].track=%d)\n", ReqTrack,
- unit[SelectedDrive].track));
- if (unit[SelectedDrive].track == ReqTrack <<
- unit[SelectedDrive].disktype->stretch) {
- fd_seek_done(0);
- return;
- }
- FDC1772_WRITE(FDC1772REG_DATA, ReqTrack <<
- unit[SelectedDrive].disktype->stretch);
- udelay(25);
- save_flags(flags);
- clf();
- SET_IRQ_HANDLER(fd_seek_done);
- FDC1772_WRITE(FDC1772REG_CMD, FDC1772CMD_SEEK | unit[SelectedDrive].steprate |
- /* DAG */
- (MotorOn?FDC1772CMDADD_H:0));
-
- restore_flags(flags);
- MotorOn = 1;
- set_head_settle_flag();
- START_TIMEOUT();
- /* wait for IRQ */
-}
-
-
-static void fd_seek_done(int status)
-{
- DPRINT(("fd_seek_done()\n"));
- STOP_TIMEOUT();
-
- /* set the correct speed */
- if (status & FDC1772STAT_RECNF) {
- printk("fd%d: seek error (to track %d)\n",
- SelectedDrive, ReqTrack);
- /* we don't know exactly which track we are on now! */
- unit[SelectedDrive].track = -1;
- fd_error();
- } else {
- unit[SelectedDrive].track = ReqTrack <<
- unit[SelectedDrive].disktype->stretch;
- NeedSeek = 0;
- fd_rwsec();
- }
-}
-
-
-/* This does the actual reading/writing after positioning the head
- * over the correct track.
- */
-
-#ifdef TRACKBUFFER
-static int MultReadInProgress = 0;
-#endif
-
-
-static void fd_rwsec(void)
-{
- unsigned long paddr, flags;
- unsigned int rwflag, old_motoron;
- unsigned int track;
-
- DPRINT(("fd_rwsec(), Sec=%d, Access=%c\n", ReqSector, ReqCmd == WRITE ? 'w' : 'r'));
- if (ReqCmd == WRITE) {
- /*cache_push( (unsigned long)ReqData, 512 ); */
- paddr = (unsigned long) ReqData;
- rwflag = 0x100;
- } else {
- paddr = (unsigned long) PhysDMABuffer;
-#ifdef TRACKBUFFER
- if (read_track)
- paddr = (unsigned long)PhysTrackBuffer;
-#endif
- rwflag = 0;
- }
-
- DPRINT(("fd_rwsec() before sidesel rwflag=%d sec=%d trk=%d\n", rwflag,
- ReqSector, FDC1772_READ(FDC1772REG_TRACK)));
- fd_select_side(ReqSide);
-
- /*DPRINT(("fd_rwsec() before start sector \n")); */
- /* Start sector of this operation */
-#ifdef TRACKBUFFER
- FDC1772_WRITE( FDC1772REG_SECTOR, !read_track ? ReqSector : 1 );
-#else
- FDC1772_WRITE( FDC1772REG_SECTOR, ReqSector );
-#endif
-
- /* Cheat for track if stretch != 0 */
- if (unit[SelectedDrive].disktype->stretch) {
- track = FDC1772_READ(FDC1772REG_TRACK);
- FDC1772_WRITE(FDC1772REG_TRACK, track >>
- unit[SelectedDrive].disktype->stretch);
- }
- udelay(25);
-
- DPRINT(("fd_rwsec() before setup DMA \n"));
- /* Setup DMA - Heavily modified by DAG */
- save_flags(flags);
- clf();
- disable_dma(FLOPPY_DMA);
- set_dma_mode(FLOPPY_DMA, rwflag ? DMA_MODE_WRITE : DMA_MODE_READ);
- set_dma_addr(FLOPPY_DMA, (long) paddr); /* DAG - changed from Atari specific */
-#ifdef TRACKBUFFER
- set_dma_count(FLOPPY_DMA,(!read_track ? 1 : unit[SelectedDrive].disktype->spt)*512);
-#else
- set_dma_count(FLOPPY_DMA, 512); /* Block/sector size - going to have to change */
-#endif
- SET_IRQ_HANDLER(fd_rwsec_done);
- /* Turn on dma int */
- enable_dma(FLOPPY_DMA);
- /* Now give it something to do */
- FDC1772_WRITE(FDC1772REG_CMD, (rwflag ? (FDC1772CMD_WRSEC | FDC1772CMDADD_P) :
-#ifdef TRACKBUFFER
- (FDC1772CMD_RDSEC | (read_track ? FDC1772CMDADD_M : 0) |
- /* Hmm - the idea here is to stop the FDC spinning the disc
- up when we know that we already still have it spinning */
- (MotorOn?FDC1772CMDADD_H:0))
-#else
- FDC1772CMD_RDSEC
-#endif
- ));
-
- restore_flags(flags);
- DPRINT(("fd_rwsec() after DMA setup flags=0x%08x\n", flags));
- /*sti(); *//* DAG - Hmm */
- /* Hmm - should do something DAG */
- old_motoron = MotorOn;
- MotorOn = 1;
- NeedSeek = 1;
-
- /* wait for interrupt */
-
-#ifdef TRACKBUFFER
- if (read_track) {
- /*
- * If reading a whole track, wait about one disk rotation and
- * then check if all sectors are read. The FDC will even
- * search for the first non-existant sector and need 1 sec to
- * recognise that it isn't present :-(
- */
- /* 1 rot. + 5 rot.s if motor was off */
- mod_timer(&readtrack_timer, jiffies + HZ/5 + (old_motoron ? 0 : HZ));
- DPRINT(("Setting readtrack_timer to %d @ %d\n",
- readtrack_timer.expires,jiffies));
- MultReadInProgress = 1;
- }
-#endif
-
- /*DPRINT(("fd_rwsec() before START_TIMEOUT \n")); */
- START_TIMEOUT();
- /*DPRINT(("fd_rwsec() after START_TIMEOUT \n")); */
-}
-
-
-#ifdef TRACKBUFFER
-
-static void fd_readtrack_check(unsigned long dummy)
-{
- unsigned long flags, addr;
- extern unsigned char *fdc1772_dataaddr;
-
- DPRINT(("fd_readtrack_check @ %d\n",jiffies));
-
- save_flags(flags);
- clf();
-
- del_timer( &readtrack_timer );
-
- if (!MultReadInProgress) {
- /* This prevents a race condition that could arise if the
- * interrupt is triggered while the calling of this timer
- * callback function takes place. The IRQ function then has
- * already cleared 'MultReadInProgress' when control flow
- * gets here.
- */
- restore_flags(flags);
- return;
- }
-
- /* get the current DMA address */
- addr=(unsigned long)fdc1772_dataaddr; /* DAG - ? */
- DPRINT(("fd_readtrack_check: addr=%x PhysTrackBuffer=%x\n",addr,PhysTrackBuffer));
-
- if (addr >= (unsigned int)PhysTrackBuffer + unit[SelectedDrive].disktype->spt*512) {
- /* already read enough data, force an FDC interrupt to stop
- * the read operation
- */
- SET_IRQ_HANDLER( NULL );
- restore_flags(flags);
- DPRINT(("fd_readtrack_check(): done\n"));
- FDC1772_WRITE( FDC1772REG_CMD, FDC1772CMD_FORCI );
- udelay(25);
-
- /* No error until now -- the FDC would have interrupted
- * otherwise!
- */
- fd_rwsec_done( 0 );
- } else {
- /* not yet finished, wait another tenth rotation */
- restore_flags(flags);
- DPRINT(("fd_readtrack_check(): not yet finished\n"));
- readtrack_timer.expires = jiffies + HZ/5/10;
- add_timer( &readtrack_timer );
- }
-}
-
-#endif
-
-static void fd_rwsec_done(int status)
-{
- unsigned int track;
-
- DPRINT(("fd_rwsec_done() status=%d @ %d\n", status,jiffies));
-
-#ifdef TRACKBUFFER
- if (read_track && !MultReadInProgress)
- return;
-
- MultReadInProgress = 0;
-
- STOP_TIMEOUT();
-
- if (read_track)
- del_timer( &readtrack_timer );
-#endif
-
-
- /* Correct the track if stretch != 0 */
- if (unit[SelectedDrive].disktype->stretch) {
- track = FDC1772_READ(FDC1772REG_TRACK);
- FDC1772_WRITE(FDC1772REG_TRACK, track <<
- unit[SelectedDrive].disktype->stretch);
- }
- if (ReqCmd == WRITE && (status & FDC1772STAT_WPROT)) {
- printk("fd%d: is write protected\n", SelectedDrive);
- goto err_end;
- }
- if ((status & FDC1772STAT_RECNF)
-#ifdef TRACKBUFFER
- /* RECNF is no error after a multiple read when the FDC
- * searched for a non-existant sector!
- */
- && !(read_track &&
- FDC1772_READ(FDC1772REG_SECTOR) > unit[SelectedDrive].disktype->spt)
-#endif
- ) {
- if (Probing) {
- if (unit[SelectedDrive].disktype > disk_type) {
- /* try another disk type */
- unit[SelectedDrive].disktype--;
- set_capacity(disks[SelectedDrive],
- unit[SelectedDrive].disktype->blocks);
- } else
- Probing = 0;
- } else {
- /* record not found, but not probing. Maybe stretch wrong ? Restart probing */
- if (unit[SelectedDrive].autoprobe) {
- unit[SelectedDrive].disktype = disk_type + NUM_DISK_TYPES - 1;
- set_capacity(disks[SelectedDrive],
- unit[SelectedDrive].disktype->blocks);
- Probing = 1;
- }
- }
- if (Probing) {
- setup_req_params(SelectedDrive);
-#ifdef TRACKBUFFER
- BufferDrive = -1;
-#endif
- do_fd_action(SelectedDrive);
- return;
- }
- printk("fd%d: sector %d not found (side %d, track %d)\n",
- SelectedDrive, FDC1772_READ(FDC1772REG_SECTOR), ReqSide, ReqTrack);
- goto err_end;
- }
- if (status & FDC1772STAT_CRC) {
- printk("fd%d: CRC error (side %d, track %d, sector %d)\n",
- SelectedDrive, ReqSide, ReqTrack, FDC1772_READ(FDC1772REG_SECTOR));
- goto err_end;
- }
- if (status & FDC1772STAT_LOST) {
- printk("fd%d: lost data (side %d, track %d, sector %d)\n",
- SelectedDrive, ReqSide, ReqTrack, FDC1772_READ(FDC1772REG_SECTOR));
- goto err_end;
- }
- Probing = 0;
-
- if (ReqCmd == READ) {
-#ifdef TRACKBUFFER
- if (!read_track) {
- /*cache_clear (PhysDMABuffer, 512);*/
- copy_buffer (DMABuffer, ReqData);
- } else {
- /*cache_clear (PhysTrackBuffer, FD1772_MAX_SECTORS * 512);*/
- BufferDrive = SelectedDrive;
- BufferSide = ReqSide;
- BufferTrack = ReqTrack;
- copy_buffer (SECTOR_BUFFER (ReqSector), ReqData);
- }
-#else
- /*cache_clear( PhysDMABuffer, 512 ); */
- copy_buffer(DMABuffer, ReqData);
-#endif
- }
- if (++ReqCnt < CURRENT->current_nr_sectors) {
- /* read next sector */
- setup_req_params(SelectedDrive);
- do_fd_action(SelectedDrive);
- } else {
- /* all sectors finished */
- CURRENT->nr_sectors -= CURRENT->current_nr_sectors;
- CURRENT->sector += CURRENT->current_nr_sectors;
- end_request(CURRENT, 1);
- redo_fd_request();
- }
- return;
-
-err_end:
-#ifdef TRACKBUFFER
- BufferDrive = -1;
-#endif
-
- fd_error();
-}
-
-
-static void fd_times_out(unsigned long dummy)
-{
- SET_IRQ_HANDLER(NULL);
- /* If the timeout occurred while the readtrack_check timer was
- * active, we need to cancel it, else bad things will happen */
- del_timer( &readtrack_timer );
- FDC1772_WRITE(FDC1772REG_CMD, FDC1772CMD_FORCI);
- udelay(25);
-
- printk("floppy timeout\n");
- STOP_TIMEOUT(); /* hmm - should we do this ? */
- fd_error();
-}
-
-
-/* The (noop) seek operation here is needed to make the WP bit in the
- * FDC1772 status register accessible for check_change. If the last disk
- * operation would have been a RDSEC, this bit would always read as 0
- * no matter what :-( To save time, the seek goes to the track we're
- * already on.
- */
-
-static void finish_fdc(void)
-{
- /* DAG - just try without this dummy seek! */
- finish_fdc_done(0);
- return;
-
- if (!NeedSeek) {
- finish_fdc_done(0);
- } else {
- DPRINT(("finish_fdc: dummy seek started\n"));
- FDC1772_WRITE(FDC1772REG_DATA, unit[SelectedDrive].track);
- SET_IRQ_HANDLER(finish_fdc_done);
- FDC1772_WRITE(FDC1772REG_CMD, FDC1772CMD_SEEK);
- MotorOn = 1;
- START_TIMEOUT();
- /* we must wait for the IRQ here, because the ST-DMA is
- * released immediately afterwards and the interrupt may be
- * delivered to the wrong driver.
- */
- }
-}
-
-
-static void finish_fdc_done(int dummy)
-{
- unsigned long flags;
-
- DPRINT(("finish_fdc_done entered\n"));
- STOP_TIMEOUT();
- NeedSeek = 0;
-
- if (timer_pending(&fd_timer) &&
- time_after(jiffies + 5, fd_timer.expires))
- /* If the check for a disk change is done too early after this
- * last seek command, the WP bit still reads wrong :-((
- */
- mod_timer(&fd_timer, jiffies + 5);
- else {
- /* START_CHECK_CHANGE_TIMER( CHECK_CHANGE_DELAY ); */
- };
- del_timer(&motor_off_timer);
- START_MOTOR_OFF_TIMER(FD_MOTOR_OFF_DELAY);
-
- save_flags(flags);
- cli();
- /* stdma_release(); - not sure if I should do something DAG */
- fdc_busy = 0;
- wake_up(&fdc_wait);
- restore_flags(flags);
-
- DPRINT(("finish_fdc() finished\n"));
-}
-
-
-/* Prevent "aliased" accesses. */
-static int fd_ref[4];
-static int fd_device[4];
-
-/* dummy for blk.h */
-static void floppy_off(unsigned int nr)
-{
-}
-
-
-/* On the old arcs write protect depends on the particular model
- of machine. On the A310, R140, and A440 there is a disc changed
- detect, however on the A4x0/1 range there is not. There
- is nothing to tell you which machine your on.
- At the moment I'm just marking changed always. I've
- left the Atari's 'change on write protect change' code in this
- part (but nothing sets it).
- RiscOS apparently checks the disc serial number etc. to detect changes
- - but if it sees a disc change line go high (?) it flips to using
- it. Well maybe I'll add that in the future (!?)
-*/
-static int check_floppy_change(struct gendisk *disk)
-{
- struct archy_floppy_struct *p = disk->private_data;
- unsigned int drive = p - unit;
-
- if (test_bit(drive, &fake_change)) {
- /* simulated change (e.g. after formatting) */
- return 1;
- }
- if (test_bit(drive, &changed_floppies)) {
- /* surely changed (the WP signal changed at least once) */
- return 1;
- }
- if (p->wpstat) {
- /* WP is on -> could be changed: to be sure, buffers should be
- * invalidated...
- */
- return 1;
- }
- return 1; /* DAG - was 0 */
-}
-
-static int floppy_revalidate(struct gendisk *disk)
-{
- struct archy_floppy_struct *p = disk->private_data;
- unsigned int drive = p - unit;
-
- if (test_bit(drive, &changed_floppies) || test_bit(drive, &fake_change)
- || unit[drive].disktype == 0) {
-#ifdef TRACKBUFFER
- BufferDrive = -1;
-#endif
- clear_bit(drive, &fake_change);
- clear_bit(drive, &changed_floppies);
- p->disktype = 0;
- }
- return 0;
-}
-
-/* This sets up the global variables describing the current request. */
-
-static void setup_req_params(int drive)
-{
- int block = ReqBlock + ReqCnt;
-
- ReqTrack = block / unit[drive].disktype->spt;
- ReqSector = block - ReqTrack * unit[drive].disktype->spt + 1;
- ReqSide = ReqTrack & 1;
- ReqTrack >>= 1;
- ReqData = ReqBuffer + 512 * ReqCnt;
-
-#ifdef TRACKBUFFER
- read_track = (ReqCmd == READ && CURRENT->errors == 0);
-#endif
-
- DPRINT(("Request params: Si=%d Tr=%d Se=%d Data=%08lx\n", ReqSide,
- ReqTrack, ReqSector, (unsigned long) ReqData));
-}
-
-
-static void redo_fd_request(void)
-{
- int drive, type;
- struct archy_floppy_struct *floppy;
-
- DPRINT(("redo_fd_request: CURRENT=%p dev=%s CURRENT->sector=%ld\n",
- CURRENT, CURRENT ? CURRENT->rq_disk->disk_name : "",
- CURRENT ? CURRENT->sector : 0));
-
-repeat:
-
- if (!CURRENT)
- goto the_end;
-
- floppy = CURRENT->rq_disk->private_data;
- drive = floppy - unit;
- type = fd_device[drive];
-
- if (!floppy->connected) {
- /* drive not connected */
- printk("Unknown Device: fd%d\n", drive);
- end_request(CURRENT, 0);
- goto repeat;
- }
- if (type == 0) {
- if (!floppy->disktype) {
- Probing = 1;
- floppy->disktype = disk_type + NUM_DISK_TYPES - 1;
- set_capacity(disks[drive], floppy->disktype->blocks);
- floppy->autoprobe = 1;
- }
- } else {
- /* user supplied disk type */
- --type;
- if (type >= NUM_DISK_TYPES) {
- printk("fd%d: invalid disk format", drive);
- end_request(CURRENT, 0);
- goto repeat;
- }
- floppy->disktype = &disk_type[type];
- set_capacity(disks[drive], floppy->disktype->blocks);
- floppy->autoprobe = 0;
- }
-
- if (CURRENT->sector + 1 > floppy->disktype->blocks) {
- end_request(CURRENT, 0);
- goto repeat;
- }
- /* stop deselect timer */
- del_timer(&motor_off_timer);
-
- ReqCnt = 0;
- ReqCmd = rq_data_dir(CURRENT);
- ReqBlock = CURRENT->sector;
- ReqBuffer = CURRENT->buffer;
- setup_req_params(drive);
- do_fd_action(drive);
-
- return;
-
-the_end:
- finish_fdc();
-}
-
-static void fd1772_checkint(void)
-{
- extern int fdc1772_bytestogo;
-
- /*printk("fd1772_checkint %d\n",fdc1772_fdc_int_done);*/
- if (fdc1772_fdc_int_done)
- floppy_irqconsequencehandler();
- if ((MultReadInProgress) && (fdc1772_bytestogo==0)) fd_readtrack_check(0);
- if (fdc_busy) {
- schedule_work(&fd1772_tq);
- }
-}
-
-static void do_fd_request(struct request_queue* q)
-{
- unsigned long flags;
-
- DPRINT(("do_fd_request for pid %d\n", current->pid));
- if (fdc_busy) return;
- save_flags(flags);
- cli();
- wait_event(fdc_wait, !fdc_busy);
- fdc_busy = 1;
- ENABLE_IRQ();
- restore_flags(flags);
-
- fdc1772_fdc_int_done = 0;
-
- redo_fd_request();
-
- schedule_work(&fd1772_tq);
-}
-
-
-static int invalidate_drive(struct block_device *bdev)
-{
- struct archy_floppy_struct *p = bdev->bd_disk->private_data;
- /* invalidate the buffer track to force a reread */
-#ifdef TRACKBUFFER
- BufferDrive = -1;
-#endif
-
- set_bit(p - unit, &fake_change);
- return 0;
-}
-
-static int fd_ioctl(struct inode *inode, struct file *filp,
- unsigned int cmd, unsigned long param)
-{
- struct block_device *bdev = inode->i_bdev;
-
- switch (cmd) {
- case FDFMTEND:
- case FDFLUSH:
- invalidate_drive(bdev);
- check_disk_change(bdev);
- case FDFMTBEG:
- return 0;
- default:
- return -EINVAL;
- }
-}
-
-
-/* Initialize the 'unit' variable for drive 'drive' */
-
-static void fd_probe(int drive)
-{
- unit[drive].connected = 0;
- unit[drive].disktype = NULL;
-
- if (!fd_test_drive_present(drive))
- return;
-
- unit[drive].connected = 1;
- unit[drive].track = -1; /* If we put the auto detect back in this can go to 0 */
- unit[drive].steprate = FDC1772STEP_6;
- MotorOn = 1; /* from probe restore operation! */
-}
-
-
-/* This function tests the physical presence of a floppy drive (not
- * whether a disk is inserted). This is done by issuing a restore
- * command, waiting max. 2 seconds (that should be enough to move the
- * head across the whole disk) and looking at the state of the "TR00"
- * signal. This should now be raised if there is a drive connected
- * (and there is no hardware failure :-) Otherwise, the drive is
- * declared absent.
- */
-
-static int fd_test_drive_present(int drive)
-{
- unsigned long timeout;
- unsigned char status;
- int ok;
-
- printk("fd_test_drive_present %d\n", drive);
- if (drive > 1)
- return (0);
- return (1); /* Simple hack for the moment - the autodetect doesn't seem to work on arc */
- fd_select_drive(drive);
-
- /* disable interrupt temporarily */
- DISABLE_IRQ();
- FDC1772_WRITE(FDC1772REG_TRACK, 0x00); /* was ff00 why? */
- FDC1772_WRITE(FDC1772REG_CMD, FDC1772CMD_RESTORE | FDC1772CMDADD_H | FDC1772STEP_6);
-
- /*printk("fd_test_drive_present: Going into timeout loop\n"); */
- for (ok = 0, timeout = jiffies + 2 * HZ + HZ / 2; time_before(jiffies, timeout);) {
- /* What does this piece of atariism do? - query for an interrupt? */
- /* if (!(mfp.par_dt_reg & 0x20))
- break; */
- /* Well this is my nearest guess - quit when we get an FDC interrupt */
- if (ioc_readb(IOC_FIQSTAT) & 2)
- break;
- }
-
- /*printk("fd_test_drive_present: Coming out of timeout loop\n"); */
- status = FDC1772_READ(FDC1772REG_STATUS);
- ok = (status & FDC1772STAT_TR00) != 0;
-
- /*printk("fd_test_drive_present: ok=%d\n",ok); */
- /* force interrupt to abort restore operation (FDC1772 would try
- * about 50 seconds!) */
- FDC1772_WRITE(FDC1772REG_CMD, FDC1772CMD_FORCI);
- udelay(500);
- status = FDC1772_READ(FDC1772REG_STATUS);
- udelay(20);
- /*printk("fd_test_drive_present: just before OK code %d\n",ok); */
-
- if (ok) {
- /* dummy seek command to make WP bit accessible */
- FDC1772_WRITE(FDC1772REG_DATA, 0);
- FDC1772_WRITE(FDC1772REG_CMD, FDC1772CMD_SEEK);
- printk("fd_test_drive_present: just before wait for int\n");
- /* DAG: Guess means wait for interrupt */
- while (!(ioc_readb(IOC_FIQSTAT) & 2));
- printk("fd_test_drive_present: just after wait for int\n");
- status = FDC1772_READ(FDC1772REG_STATUS);
- }
- printk("fd_test_drive_present: just before ENABLE_IRQ\n");
- ENABLE_IRQ();
- printk("fd_test_drive_present: about to return\n");
- return (ok);
-}
-
-
-/* Look how many and which kind of drives are connected. If there are
- * floppies, additionally start the disk-change and motor-off timers.
- */
-
-static void config_types(void)
-{
- int drive, cnt = 0;
-
- printk("Probing floppy drive(s):\n");
- for (drive = 0; drive < FD_MAX_UNITS; drive++) {
- fd_probe(drive);
- if (unit[drive].connected) {
- printk("fd%d\n", drive);
- ++cnt;
- }
- }
-
- if (FDC1772_READ(FDC1772REG_STATUS) & FDC1772STAT_BUSY) {
- /* If FDC1772 is still busy from probing, give it another FORCI
- * command to abort the operation. If this isn't done, the FDC1772
- * will interrupt later and its IRQ line stays low, because
- * the status register isn't read. And this will block any
- * interrupts on this IRQ line :-(
- */
- FDC1772_WRITE(FDC1772REG_CMD, FDC1772CMD_FORCI);
- udelay(500);
- FDC1772_READ(FDC1772REG_STATUS);
- udelay(20);
- }
- if (cnt > 0) {
- START_MOTOR_OFF_TIMER(FD_MOTOR_OFF_DELAY);
- if (cnt == 1)
- fd_select_drive(0);
- /*START_CHECK_CHANGE_TIMER( CHECK_CHANGE_DELAY ); */
- }
-}
-
-/*
- * floppy_open check for aliasing (/dev/fd0 can be the same as
- * /dev/PS0 etc), and disallows simultaneous access to the same
- * drive with different device numbers.
- */
-
-static int floppy_open(struct inode *inode, struct file *filp)
-{
- int drive = iminor(inode) & 3;
- int type = iminor(inode) >> 2;
- int old_dev = fd_device[drive];
-
- if (fd_ref[drive] && old_dev != type)
- return -EBUSY;
-
- if (fd_ref[drive] == -1 || (fd_ref[drive] && filp->f_flags & O_EXCL))
- return -EBUSY;
-
- if (filp->f_flags & O_EXCL)
- fd_ref[drive] = -1;
- else
- fd_ref[drive]++;
-
- fd_device[drive] = type;
-
- if (filp->f_flags & O_NDELAY)
- return 0;
-
- if (filp->f_mode & 3) {
- check_disk_change(inode->i_bdev);
- if (filp->f_mode & 2) {
- if (unit[drive].wpstat) {
- floppy_release(inode, filp);
- return -EROFS;
- }
- }
- }
- return 0;
-}
-
-
-static int floppy_release(struct inode *inode, struct file *filp)
-{
- int drive = iminor(inode) & 3;
-
- if (fd_ref[drive] < 0)
- fd_ref[drive] = 0;
- else if (!fd_ref[drive]--) {
- printk("floppy_release with fd_ref == 0");
- fd_ref[drive] = 0;
- }
-
- return 0;
-}
-
-static struct block_device_operations floppy_fops =
-{
- .open = floppy_open,
- .release = floppy_release,
- .ioctl = fd_ioctl,
- .media_changed = check_floppy_change,
- .revalidate_disk= floppy_revalidate,
-};
-
-static struct kobject *floppy_find(dev_t dev, int *part, void *data)
-{
- int drive = *part & 3;
- if ((*part >> 2) > NUM_DISK_TYPES || drive >= FD_MAX_UNITS)
- return NULL;
- *part = 0;
- return get_disk(disks[drive]);
-}
-
-int fd1772_init(void)
-{
- static DEFINE_SPINLOCK(lock);
- int i, err = -ENOMEM;
-
- if (!machine_is_archimedes())
- return 0;
-
- for (i = 0; i < FD_MAX_UNITS; i++) {
- disks[i] = alloc_disk(1);
- if (!disks[i])
- goto err_disk;
- }
-
- err = register_blkdev(MAJOR_NR, "fd");
- if (err)
- goto err_disk;
-
- err = -EBUSY;
- if (request_dma(FLOPPY_DMA, "fd1772")) {
- printk("Unable to grab DMA%d for the floppy (1772) driver\n", FLOPPY_DMA);
- goto err_blkdev;
- };
-
- if (request_dma(FIQ_FD1772, "fd1772 end")) {
- printk("Unable to grab DMA%d for the floppy (1772) driver\n", FIQ_FD1772);
- goto err_dma1;
- };
-
- /* initialize variables */
- SelectedDrive = -1;
-#ifdef TRACKBUFFER
- BufferDrive = BufferSide = BufferTrack = -1;
- /* Atari uses 512 - I want to eventually cope with 1K sectors */
- DMABuffer = kmalloc((FD1772_MAX_SECTORS+1)*512,GFP_KERNEL);
- TrackBuffer = DMABuffer + 512;
-#else
- /* Allocate memory for the DMAbuffer - on the Atari this takes it
- out of some special memory... */
- DMABuffer = kmalloc(2048); /* Copes with pretty large sectors */
-#endif
- err = -ENOMEM;
- if (!DMAbuffer)
- goto err_dma2;
-
- enable_dma(FIQ_FD1772); /* This inserts a call to our command end routine */
-
- floppy_queue = blk_init_queue(do_fd_request, &lock);
- if (!floppy_queue)
- goto err_queue;
-
- for (i = 0; i < FD_MAX_UNITS; i++) {
- unit[i].track = -1;
- disks[i]->major = MAJOR_NR;
- disks[i]->first_minor = 0;
- disks[i]->fops = &floppy_fops;
- sprintf(disks[i]->disk_name, "fd%d", i);
- disks[i]->private_data = &unit[i];
- disks[i]->queue = floppy_queue;
- set_capacity(disks[i], MAX_DISK_SIZE * 2);
- }
- blk_register_region(MKDEV(MAJOR_NR, 0), 256, THIS_MODULE,
- floppy_find, NULL, NULL);
-
- for (i = 0; i < FD_MAX_UNITS; i++)
- add_disk(disks[i]);
-
- config_types();
-
- return 0;
-
- err_queue:
- kfree(DMAbuffer);
- err_dma2:
- free_dma(FIQ_FD1772);
-
- err_dma1:
- free_dma(FLOPPY_DMA);
-
- err_blkdev:
- unregister_blkdev(MAJOR_NR, "fd");
-
- err_disk:
- while (i--)
- put_disk(disks[i]);
- return err;
-}
diff --git a/drivers/acorn/block/fd1772dma.S b/drivers/acorn/block/fd1772dma.S
deleted file mode 100644
index 7964435443e..00000000000
--- a/drivers/acorn/block/fd1772dma.S
+++ /dev/null
@@ -1,100 +0,0 @@
-#include <asm/hardware.h>
-
-@ Code for DMA with the 1772 fdc
-.text
-
-
- .global fdc1772_dataaddr
-fdc1772_fiqdata:
-@ Number of bytes left to DMA
- .global fdc1772_bytestogo
-fdc1772_bytestogo:
- .word 0
-@ Place to put/get data from in DMA
- .global fdc1772_dataaddr
-fdc1772_dataaddr:
- .word 0
-
- .global fdc1772_fdc_int_done
-fdc1772_fdc_int_done:
- .word 0
- .global fdc1772_comendstatus
-fdc1772_comendstatus:
- .word 0
-
-@ We hang this off DMA channel 1
- .global fdc1772_comendhandler
-fdc1772_comendhandler:
- mov r8,#IOC_BASE
- ldrb r9,[r8,#0x34] @ IOC FIQ status
- tst r9,#2
- subeqs pc,r14,#4 @ should I leave a space here
- orr r9,r8,#0x10000 @ FDC base
- adr r8,fdc1772_fdc_int_done
- ldrb r10,[r9,#0] @ FDC status
- mov r9,#1 @ Got a FIQ flag
- stmia r8,{r9,r10}
- subs pc,r14,#4
-
-
- .global fdc1772_dma_read
-fdc1772_dma_read:
- mov r8,#IOC_BASE
- ldrb r9,[r8,#0x34] @ IOC FIQ status
- tst r9,#1
- beq fdc1772_dma_read_notours
- orr r8,r8,#0x10000 @ FDC base
- ldrb r10,[r8,#0xc] @ Read from FDC data reg (also clears interrupt)
- ldmia r11,{r8,r9}
- subs r8,r8,#1 @ One less byte to go
- @ If there was somewhere for this data to go then store it and update pointers
- strplb r10,[r9],#1 @ Store the data and increment the pointer
- stmplia r11,{r8,r9} @ Update count/pointers
- @ Handle any other interrupts if there are any
-fdc1772_dma_read_notours:
- @ Cant branch because this code has been copied down to the FIQ vector
- ldr pc,[pc,#-4]
- .word fdc1772_comendhandler
- .global fdc1772_dma_read_end
-fdc1772_dma_read_end:
-
- .global fdc1772_dma_write
-fdc1772_dma_write:
- mov r8,#IOC_BASE
- ldrb r9,[r8,#0x34] @ IOC FIQ status
- tst r9,#1
- beq fdc1772_dma_write_notours
- orr r8,r8,#0x10000 @ FDC base
- ldmia r11,{r9,r10}
- subs r9,r9,#1 @ One less byte to go
- @ If there really is some data then get it, store it and update count
- ldrplb r12,[r10],#1
- strplb r12,[r8,#0xc] @ write it to FDC data reg
- stmplia r11,{r9,r10} @ Update count and pointer - should clear interrupt
- @ Handle any other interrupts
-fdc1772_dma_write_notours:
- @ Cant branch because this code has been copied down to the FIQ vector
- ldr pc,[pc,#-4]
- .word fdc1772_comendhandler
-
- .global fdc1772_dma_write_end
-fdc1772_dma_write_end:
-
-
-@ Setup the FIQ R11 to point to the data and store the count, address
-@ for this dma
-@ R0=count
-@ R1=address
- .global fdc1772_setupdma
-fdc1772_setupdma:
- @ The big job is flipping in and out of FIQ mode
- adr r2,fdc1772_fiqdata @ This is what we really came here for
- stmia r2,{r0,r1}
- mov r3, pc
- teqp pc,#0x0c000001 @ Disable FIQs, IRQs and switch to FIQ mode
- mov r0,r0 @ NOP
- mov r11,r2
- teqp r3,#0 @ Normal mode
- mov r0,r0 @ NOP
- mov pc,r14
-
diff --git a/drivers/acorn/block/mfm.S b/drivers/acorn/block/mfm.S
deleted file mode 100644
index c90cbd41ce2..00000000000
--- a/drivers/acorn/block/mfm.S
+++ /dev/null
@@ -1,162 +0,0 @@
-@ Read/Write DMA code for the ST506/MFM hard drive controllers on the A400 Acorn Archimedes
-@ motherboard and on ST506 expansion podules.
-@ (c) David Alan Gilbert (linux@treblig.org) 1996-1999
-
-#include <asm/assembler.h>
-
-hdc63463_irqdata:
-@ Controller base address
- .global hdc63463_baseaddress
-hdc63463_baseaddress:
- .word 0
-
- .global hdc63463_irqpolladdress
-hdc63463_irqpolladdress:
- .word 0
-
- .global hdc63463_irqpollmask
-hdc63463_irqpollmask:
- .word 0
-
-@ where to read/write data from the kernel data space
- .global hdc63463_dataptr
-hdc63463_dataptr:
- .word 0
-
-@ Number of bytes left to transfer
- .global hdc63463_dataleft
-hdc63463_dataleft:
- .word 0
-
-@ -------------------------------------------------------------------------
-@ hdc63463_writedma: DMA from host to controller
-@ internal reg usage: r0=hdc base address, r1=irq poll address, r2=poll mask
-@ r3=data ptr, r4=data left, r5,r6=temporary
- .global hdc63463_writedma
-hdc63463_writedma:
- stmfd sp!,{r4-r7}
- adr r5,hdc63463_irqdata
- ldmia r5,{r0,r1,r2,r3,r4}
-
-writedma_again:
-
- @ test number of remaining bytes to transfer
- cmp r4,#0
- beq writedma_end
- bmi writedma_end
-
- @ Check the hdc is interrupting
- ldrb r5,[r1,#0]
- tst r5,r2
- beq writedma_end
-
- @ Transfer a block of upto 256 bytes
- cmp r4,#256
- movlt r7,r4
- movge r7,#256
-
- @ Check the hdc is still busy and command has not ended and no errors
- ldr r5,[r0,#32] @ Status reg - 16 bit - its the top few bits which are status
- @ think we should continue DMA until it drops busy - perhaps this was
- @ the main problem with corrected errors causing a hang
- @tst r5,#0x3c00 @ Test for things which should be off
- @bne writedma_end
- and r5,r5,#0x8000 @ This is test for things which should be on: Busy
- cmp r5,#0x8000
- bne writedma_end
-
- @ Bytes remaining at end
- sub r4,r4,r7
-
- @ HDC Write register location
- add r0,r0,#32+8
-
-writedma_loop:
- @ OK - pretty sure we should be doing this
-
- ldr r5,[r3],#4 @ Get a word to be written
- @ get bottom half to be sent first
- mov r6,r5,lsl#16 @ Separate the first 2 bytes
- orr r2,r6,r6,lsr #16 @ Duplicate them in the bottom half of the word
- @ now the top half
- mov r6,r5,lsr#16 @ Get 2nd 2 bytes
- orr r6,r6,r6,lsl#16 @ Duplicate
- @str r6,[r0] @ to hdc
- stmia r0,{r2,r6}
- subs r7,r7,#4 @ Dec. number of bytes left
- bne writedma_loop
-
- @ If we were too slow we had better go through again - DAG - took out with new interrupt routine
- @ sub r0,r0,#32+8
- @ adr r2,hdc63463_irqdata
- @ ldr r2,[r2,#8]
- @ b writedma_again
-
-writedma_end:
- adr r5,hdc63463_irqdata+12
- stmia r5,{r3,r4}
- ldmfd sp!,{r4-r7}
- RETINSTR(mov,pc,lr)
-
-@ -------------------------------------------------------------------------
-@ hdc63463_readdma: DMA from controller to host
-@ internal reg usage: r0=hdc base address, r1=irq poll address, r2=poll mask
-@ r3=data ptr, r4=data left, r5,r6=temporary
- .global hdc63463_readdma
-hdc63463_readdma:
- stmfd sp!,{r4-r7}
- adr r5,hdc63463_irqdata
- ldmia r5,{r0,r1,r2,r3,r4}
-
-readdma_again:
- @ test number of remaining bytes to transfer
- cmp r4,#0
- beq readdma_end
- bmi readdma_end
-
- @ Check the hdc is interrupting
- ldrb r5,[r1,#0]
- tst r5,r2
- beq readdma_end
-
- @ Check the hdc is still busy and command has not ended and no errors
- ldr r5,[r0,#32] @ Status reg - 16 bit - its the top few bits which are status
- @ think we should continue DMA until it drops busy - perhaps this was
- @ the main problem with corrected errors causing a hang
- @tst r5,#0x3c00 @ Test for things which should be off
- @bne readdma_end
- and r5,r5,#0x8000 @ This is test for things which should be on: Busy
- cmp r5,#0x8000
- bne readdma_end
-
- @ Transfer a block of upto 256 bytes
- cmp r4,#256
- movlt r7,r4
- movge r7,#256
-
- @ Bytes remaining at end
- sub r4,r4,r7
-
- @ Set a pointer to the data register in the HDC
- add r0,r0,#8
-readdma_loop:
- @ OK - pretty sure we should be doing this
- ldmia r0,{r5,r6}
- mov r5,r5,lsl#16
- mov r6,r6,lsl#16
- orr r6,r6,r5,lsr #16
- str r6,[r3],#4
- subs r7,r7,#4 @ Decrement bytes to go
- bne readdma_loop
-
- @ Try reading multiple blocks - if this was fast enough then I do not think
- @ this should help - NO taken out DAG - new interrupt handler has
- @ non-consecutive memory blocks
- @ sub r0,r0,#8
- @ b readdma_again
-
-readdma_end:
- adr r5,hdc63463_irqdata+12
- stmia r5,{r3,r4}
- ldmfd sp!,{r4-r7}
- RETINSTR(mov,pc,lr)
diff --git a/drivers/acorn/block/mfmhd.c b/drivers/acorn/block/mfmhd.c
deleted file mode 100644
index 74058db674d..00000000000
--- a/drivers/acorn/block/mfmhd.c
+++ /dev/null
@@ -1,1385 +0,0 @@
-/*
- * linux/drivers/acorn/block/mfmhd.c
- *
- * Copyright (C) 1995, 1996 Russell King, Dave Alan Gilbert (gilbertd@cs.man.ac.uk)
- *
- * MFM hard drive code [experimental]
- */
-
-/*
- * Change list:
- *
- * 3/2/96:DAG: Started a change list :-)
- * Set the hardsect_size pointers up since we are running 256 byte
- * sectors
- * Added DMA code, put it into the rw_intr
- * Moved RCAL out of generic interrupt code - don't want to do it
- * while DMA'ing - its now in individual handlers.
- * Took interrupt handlers off task queue lists and called
- * directly - not sure of implications.
- *
- * 18/2/96:DAG: Well its reading OK I think, well enough for image file code
- * to find the image file; but now I've discovered that I actually
- * have to put some code in for image files.
- *
- * Added stuff for image files; seems to work, but I've not
- * got a multisegment image file (I don't think!).
- * Put in a hack (yep a real hack) for multiple cylinder reads.
- * Not convinced its working.
- *
- * 5/4/96:DAG: Added asm/hardware.h and use IOC_ macros
- * Rewrote dma code in mfm.S (again!) - now takes a word at a time
- * from main RAM for speed; still doesn't feel speedy!
- *
- * 20/4/96:DAG: After rewriting mfm.S a heck of a lot of times and speeding
- * things up, I've finally figured out why its so damn slow.
- * Linux is only reading a block at a time, and so you never
- * get more than 1K per disc revoloution ~=60K/second.
- *
- * 27/4/96:DAG: On Russell's advice I change ll_rw_blk.c to ask it to
- * join adjacent blocks together. Everything falls flat on its
- * face.
- * Four hours of debugging later; I hadn't realised that
- * ll_rw_blk would be so generous as to join blocks whose
- * results aren't going into consecutive buffers.
- *
- * OK; severe rehacking of mfm_rw_interrupt; now end_request's
- * as soon as its DMA'd each request. Odd thing is that
- * we are sometimes getting interrupts where we are not transferring
- * any data; why? Is that what happens when you miss? I doubt
- * it; are we too fast? No - its just at command ends. Got 240K/s
- * better than before, but RiscOS hits 480K/s
- *
- * 25/6/96:RMK: Fixed init code to allow the MFM podule to work. Increased the
- * number of errors for my Miniscribe drive (8425).
- *
- * 30/6/96:DAG: Russell suggested that a check drive 0 might turn the LEDs off
- * - so in request_done just before it clears Busy it sends a
- * check drive 0 - and the LEDs go off!!!!
- *
- * Added test for mainboard controller. - Removes need for separate
- * define.
- *
- * 13/7/96:DAG: Changed hardware sectore size to 512 in attempt to make
- * IM drivers work.
- * 21/7/96:DAG: Took out old image file stuff (accessing it now produces an IO
- * error.)
- *
- * 17/8/96:DAG: Ran through indent -kr -i8; evil - all my nice 2 character indents
- * gone :-( Hand modified afterwards.
- * Took out last remains of the older image map system.
- *
- * 22/9/96:DAG: Changed mfm.S so it will carry on DMA'ing til; BSY is dropped
- * Changed mfm_rw_intr so that it doesn't follow the error
- * code until BSY is dropped. Nope - still broke. Problem
- * may revolve around when it reads the results for the error
- * number?
- *
- *16/11/96:DAG: Modified for 2.0.18; request_irq changed
- *
- *17/12/96:RMK: Various cleanups, reorganisation, and the changes for new IO system.
- * Improved probe for onboard MFM chip - it was hanging on my A5k.
- * Added autodetect CHS code such that we don't rely on the presence
- * of an ADFS boot block. Added ioport resource manager calls so
- * that we don't clash with already-running hardware (eg. RiscPC Ether
- * card slots if someone tries this)!
- *
- * 17/1/97:RMK: Upgraded to 2.1 kernels.
- *
- * 4/3/98:RMK: Changed major number to 21.
- *
- * 27/6/98:RMK: Changed asm/delay.h to linux/delay.h for mdelay().
- */
-
-/*
- * Possible enhancements:
- * Multi-thread the code so that it is possible that while one drive
- * is seeking, the other one can be reading data/seeking as well.
- * This would be a performance boost with dual drive systems.
- */
-
-#include <linux/module.h>
-#include <linux/fs.h>
-#include <linux/interrupt.h>
-#include <linux/kernel.h>
-#include <linux/timer.h>
-#include <linux/mm.h>
-#include <linux/errno.h>
-#include <linux/genhd.h>
-#include <linux/major.h>
-#include <linux/ioport.h>
-#include <linux/delay.h>
-#include <linux/blkpg.h>
-
-#include <asm/system.h>
-#include <asm/io.h>
-#include <asm/irq.h>
-#include <asm/uaccess.h>
-#include <asm/dma.h>
-#include <asm/hardware.h>
-#include <asm/ecard.h>
-#include <asm/hardware/ioc.h>
-
-static void (*do_mfm)(void) = NULL;
-static struct request_queue *mfm_queue;
-static DEFINE_SPINLOCK(mfm_lock);
-
-#define MAJOR_NR MFM_ACORN_MAJOR
-#define QUEUE (mfm_queue)
-#define CURRENT elv_next_request(mfm_queue)
-
-/*
- * Configuration section
- *
- * This is the maximum number of drives that we accept
- */
-#define MFM_MAXDRIVES 2
-/*
- * Linux I/O address of onboard MFM controller or 0 to disable this
- */
-#define ONBOARD_MFM_ADDRESS ((0x002d0000 >> 2) | 0x80000000)
-/*
- * Uncomment this to enable debugging in the MFM driver...
- */
-#ifndef DEBUG
-/*#define DEBUG */
-#endif
-/*
- * End of configuration
- */
-
-
-/*
- * This structure contains all information to do with a particular physical
- * device.
- */
-struct mfm_info {
- unsigned char sectors;
- unsigned char heads;
- unsigned short cylinders;
- unsigned short lowcurrent;
- unsigned short precomp;
-#define NO_TRACK -1
-#define NEED_1_RECAL -2
-#define NEED_2_RECAL -3
- int cylinder;
- struct {
- char recal;
- char report;
- char abort;
- } errors;
-} mfm_info[MFM_MAXDRIVES];
-
-#define MFM_DRV_INFO mfm_info[raw_cmd.dev]
-
-/* Stuff from the assembly routines */
-extern unsigned int hdc63463_baseaddress; /* Controller base address */
-extern unsigned int hdc63463_irqpolladdress; /* Address to read to test for int */
-extern unsigned int hdc63463_irqpollmask; /* Mask for irq register */
-extern unsigned int hdc63463_dataptr; /* Pointer to kernel data space to DMA */
-extern int hdc63463_dataleft; /* Number of bytes left to transfer */
-
-
-
-
-static int lastspecifieddrive;
-static unsigned Busy;
-
-static unsigned int PartFragRead; /* The number of sectors which have been read
- during a partial read split over two
- cylinders. If 0 it means a partial
- read did not occur. */
-
-static unsigned int PartFragRead_RestartBlock; /* Where to restart on a split access */
-static unsigned int PartFragRead_SectorsLeft; /* Where to restart on a split access */
-
-static int Sectors256LeftInCurrent; /* i.e. 256 byte sectors left in current */
-static int SectorsLeftInRequest; /* i.e. blocks left in the thing mfm_request was called for */
-static int Copy_Sector; /* The 256 byte sector we are currently at - fragments need to know
- where to take over */
-static char *Copy_buffer;
-
-
-static void mfm_seek(void);
-static void mfm_rerequest(void);
-static void mfm_request(void);
-static void mfm_specify (void);
-static void issue_request(unsigned int block, unsigned int nsect,
- struct request *req);
-
-static unsigned int mfm_addr; /* Controller address */
-static unsigned int mfm_IRQPollLoc; /* Address to read for IRQ information */
-static unsigned int mfm_irqenable; /* Podule IRQ enable location */
-static unsigned char mfm_irq; /* Interrupt number */
-static int mfm_drives = 0; /* drives available */
-static int mfm_status = 0; /* interrupt status */
-static int *errors;
-
-static struct rawcmd {
- unsigned int dev;
- unsigned int cylinder;
- unsigned int head;
- unsigned int sector;
- unsigned int cmdtype;
- unsigned int cmdcode;
- unsigned char cmddata[16];
- unsigned int cmdlen;
-} raw_cmd;
-
-static unsigned char result[16];
-
-static struct cont {
- void (*interrupt) (void); /* interrupt handler */
- void (*error) (void); /* error handler */
- void (*redo) (void); /* redo handler */
- void (*done) (int st); /* done handler */
-} *cont = NULL;
-
-#if 0
-static struct tq_struct mfm_tq = {0, 0, (void (*)(void *)) NULL, 0};
-#endif
-
-int number_mfm_drives = 1;
-
-/* ------------------------------------------------------------------------------------------ */
-/*
- * From the HD63463 data sheet from Hitachi Ltd.
- */
-
-#define MFM_COMMAND (mfm_addr + 0)
-#define MFM_DATAOUT (mfm_addr + 1)
-#define MFM_STATUS (mfm_addr + 8)
-#define MFM_DATAIN (mfm_addr + 9)
-
-#define CMD_ABT 0xF0 /* Abort */
-#define CMD_SPC 0xE8 /* Specify */
-#define CMD_TST 0xE0 /* Test */
-#define CMD_RCLB 0xC8 /* Recalibrate */
-#define CMD_SEK 0xC0 /* Seek */
-#define CMD_WFS 0xAB /* Write Format Skew */
-#define CMD_WFM 0xA3 /* Write Format */
-#define CMD_MTB 0x90 /* Memory to buffer */
-#define CMD_CMPD 0x88 /* Compare data */
-#define CMD_WD 0x87 /* Write data */
-#define CMD_RED 0x70 /* Read erroneous data */
-#define CMD_RIS 0x68 /* Read ID skew */
-#define CMD_FID 0x61 /* Find ID */
-#define CMD_RID 0x60 /* Read ID */
-#define CMD_BTM 0x50 /* Buffer to memory */
-#define CMD_CKD 0x48 /* Check data */
-#define CMD_RD 0x40 /* Read data */
-#define CMD_OPBW 0x38 /* Open buffer write */
-#define CMD_OPBR 0x30 /* Open buffer read */
-#define CMD_CKV 0x28 /* Check drive */
-#define CMD_CKE 0x20 /* Check ECC */
-#define CMD_POD 0x18 /* Polling disable */
-#define CMD_POL 0x10 /* Polling enable */
-#define CMD_RCAL 0x08 /* Recall */
-
-#define STAT_BSY 0x8000 /* Busy */
-#define STAT_CPR 0x4000 /* Command Parameter Rejection */
-#define STAT_CED 0x2000 /* Command end */
-#define STAT_SED 0x1000 /* Seek end */
-#define STAT_DER 0x0800 /* Drive error */
-#define STAT_ABN 0x0400 /* Abnormal end */
-#define STAT_POL 0x0200 /* Polling */
-
-/* ------------------------------------------------------------------------------------------ */
-#ifdef DEBUG
-static void console_printf(const char *fmt,...)
-{
- static char buffer[2048]; /* Arbitary! */
- extern void console_print(const char *);
- unsigned long flags;
- va_list ap;
-
- local_irq_save(flags);
-
- va_start(ap, fmt);
- vsprintf(buffer, fmt, ap);
- console_print(buffer);
- va_end(fmt);
-
- local_irq_restore(flags);
-}; /* console_printf */
-
-#define DBG(x...) console_printf(x)
-#else
-#define DBG(x...)
-#endif
-
-static void print_status(void)
-{
- char *error;
- static char *errors[] = {
- "no error",
- "command aborted",
- "invalid command",
- "parameter error",
- "not initialised",
- "rejected TEST",
- "no useld",
- "write fault",
- "not ready",
- "no scp",
- "in seek",
- "invalid NCA",
- "invalid step rate",
- "seek error",
- "over run",
- "invalid PHA",
- "data field EEC error",
- "data field CRC error",
- "error corrected",
- "data field fatal error",
- "no data am",
- "not hit",
- "ID field CRC error",
- "time over",
- "no ID am",
- "not writable"
- };
- if (result[1] < 0x65)
- error = errors[result[1] >> 2];
- else
- error = "unknown";
- printk("(");
- if (mfm_status & STAT_BSY) printk("BSY ");
- if (mfm_status & STAT_CPR) printk("CPR ");
- if (mfm_status & STAT_CED) printk("CED ");
- if (mfm_status & STAT_SED) printk("SED ");
- if (mfm_status & STAT_DER) printk("DER ");
- if (mfm_status & STAT_ABN) printk("ABN ");
- if (mfm_status & STAT_POL) printk("POL ");
- printk(") SSB = %X (%s)\n", result[1], error);
-
-}
-
-/* ------------------------------------------------------------------------------------- */
-
-static void issue_command(int command, unsigned char *cmdb, int len)
-{
- int status;
-#ifdef DEBUG
- int i;
- console_printf("issue_command: %02X: ", command);
- for (i = 0; i < len; i++)
- console_printf("%02X ", cmdb[i]);
- console_printf("\n");
-#endif
-
- do {
- status = inw(MFM_STATUS);
- } while (status & (STAT_BSY | STAT_POL));
- DBG("issue_command: status after pol/bsy loop: %02X:\n ", status >> 8);
-
- if (status & (STAT_CPR | STAT_CED | STAT_SED | STAT_DER | STAT_ABN)) {
- outw(CMD_RCAL, MFM_COMMAND);
- while (inw(MFM_STATUS) & STAT_BSY);
- }
- status = inw(MFM_STATUS);
- DBG("issue_command: status before parameter issue: %02X:\n ", status >> 8);
-
- while (len > 0) {
- outw(cmdb[1] | (cmdb[0] << 8), MFM_DATAOUT);
- len -= 2;
- cmdb += 2;
- }
- status = inw(MFM_STATUS);
- DBG("issue_command: status before command issue: %02X:\n ", status >> 8);
-
- outw(command, MFM_COMMAND);
- status = inw(MFM_STATUS);
- DBG("issue_command: status immediately after command issue: %02X:\n ", status >> 8);
-}
-
-static void wait_for_completion(void)
-{
- while ((mfm_status = inw(MFM_STATUS)) & STAT_BSY);
-}
-
-static void wait_for_command_end(void)
-{
- int i;
-
- while (!((mfm_status = inw(MFM_STATUS)) & STAT_CED));
-
- for (i = 0; i < 16;) {
- int in;
- in = inw(MFM_DATAIN);
- result[i++] = in >> 8;
- result[i++] = in;
- }
- outw (CMD_RCAL, MFM_COMMAND);
-}
-
-/* ------------------------------------------------------------------------------------- */
-
-static void mfm_rw_intr(void)
-{
- int old_status; /* Holds status on entry, we read to see if the command just finished */
-#ifdef DEBUG
- console_printf("mfm_rw_intr...dataleft=%d\n", hdc63463_dataleft);
- print_status();
-#endif
-
- /* Now don't handle the error until BSY drops */
- if ((mfm_status & (STAT_DER | STAT_ABN)) && ((mfm_status&STAT_BSY)==0)) {
- /* Something has gone wrong - let's try that again */
- outw(CMD_RCAL, MFM_COMMAND); /* Clear interrupt condition */
- if (cont) {
- DBG("mfm_rw_intr: DER/ABN err\n");
- cont->error();
- cont->redo();
- };
- return;
- };
-
- /* OK so what ever happened it's not an error, now I reckon we are left between
- a choice of command end or some data which is ready to be collected */
- /* I think we have to transfer data while the interrupt line is on and its
- not any other type of interrupt */
- if (rq_data_dir(CURRENT) == WRITE) {
- extern void hdc63463_writedma(void);
- if ((hdc63463_dataleft <= 0) && (!(mfm_status & STAT_CED))) {
- printk("mfm_rw_intr: Apparent DMA write request when no more to DMA\n");
- if (cont) {
- cont->error();
- cont->redo();
- };
- return;
- };
- hdc63463_writedma();
- } else {
- extern void hdc63463_readdma(void);
- if ((hdc63463_dataleft <= 0) && (!(mfm_status & STAT_CED))) {
- printk("mfm_rw_intr: Apparent DMA read request when no more to DMA\n");
- if (cont) {
- cont->error();
- cont->redo();
- };
- return;
- };
- DBG("Going to try read dma..............status=0x%x, buffer=%p\n", mfm_status, hdc63463_dataptr);
- hdc63463_readdma();
- }; /* Read */
-
- if (hdc63463_dataptr != ((unsigned int) Copy_buffer + 256)) {
- /* If we didn't actually manage to get any data on this interrupt - but why? We got the interrupt */
- /* Ah - well looking at the status its just when we get command end; so no problem */
- /*console_printf("mfm: dataptr mismatch. dataptr=0x%08x Copy_buffer+256=0x%08p\n",
- hdc63463_dataptr,Copy_buffer+256);
- print_status(); */
- } else {
- Sectors256LeftInCurrent--;
- Copy_buffer += 256;
- Copy_Sector++;
-
- /* We have come to the end of this request */
- if (!Sectors256LeftInCurrent) {
- DBG("mfm: end_request for CURRENT=0x%p CURRENT(sector=%d current_nr_sectors=%d nr_sectors=%d)\n",
- CURRENT, CURRENT->sector, CURRENT->current_nr_sectors, CURRENT->nr_sectors);
-
- CURRENT->nr_sectors -= CURRENT->current_nr_sectors;
- CURRENT->sector += CURRENT->current_nr_sectors;
- SectorsLeftInRequest -= CURRENT->current_nr_sectors;
-
- end_request(CURRENT, 1);
- if (SectorsLeftInRequest) {
- hdc63463_dataptr = (unsigned int) CURRENT->buffer;
- Copy_buffer = CURRENT->buffer;
- Sectors256LeftInCurrent = CURRENT->current_nr_sectors * 2;
- errors = &(CURRENT->errors);
- /* These should match the present calculations of the next logical sector
- on the device
- Copy_Sector=CURRENT->sector*2; */
-
- if (Copy_Sector != CURRENT->sector * 2)
-#ifdef DEBUG
- /*console_printf*/printk("mfm: Copy_Sector mismatch. Copy_Sector=%d CURRENT->sector*2=%d\n",
- Copy_Sector, CURRENT->sector * 2);
-#else
- printk("mfm: Copy_Sector mismatch! Eek!\n");
-#endif
- }; /* CURRENT */
- }; /* Sectors256LeftInCurrent */
- };
-
- old_status = mfm_status;
- mfm_status = inw(MFM_STATUS);
- if (mfm_status & (STAT_DER | STAT_ABN)) {
- /* Something has gone wrong - let's try that again */
- if (cont) {
- DBG("mfm_rw_intr: DER/ABN error\n");
- cont->error();
- cont->redo();
- };
- return;
- };
-
- /* If this code wasn't entered due to command_end but there is
- now a command end we must read the command results out. If it was
- entered like this then mfm_interrupt_handler would have done the
- job. */
- if ((!((old_status & (STAT_CPR | STAT_BSY)) == STAT_CPR)) &&
- ((mfm_status & (STAT_CPR | STAT_BSY)) == STAT_CPR)) {
- int len = 0;
- while (len < 16) {
- int in;
- in = inw(MFM_DATAIN);
- result[len++] = in >> 8;
- result[len++] = in;
- };
- }; /* Result read */
-
- /*console_printf ("mfm_rw_intr nearexit [%02X]\n", __raw_readb(mfm_IRQPollLoc)); */
-
- /* If end of command move on */
- if (mfm_status & (STAT_CED)) {
- outw(CMD_RCAL, MFM_COMMAND); /* Clear interrupt condition */
- /* End of command - trigger the next command */
- if (cont) {
- cont->done(1);
- }
- DBG("mfm_rw_intr: returned from cont->done\n");
- } else {
- /* Its going to generate another interrupt */
- do_mfm = mfm_rw_intr;
- };
-}
-
-static void mfm_setup_rw(void)
-{
- DBG("setting up for rw...\n");
-
- do_mfm = mfm_rw_intr;
- issue_command(raw_cmd.cmdcode, raw_cmd.cmddata, raw_cmd.cmdlen);
-}
-
-static void mfm_recal_intr(void)
-{
-#ifdef DEBUG
- console_printf("recal intr - status = ");
- print_status();
-#endif
- outw(CMD_RCAL, MFM_COMMAND); /* Clear interrupt condition */
- if (mfm_status & (STAT_DER | STAT_ABN)) {
- printk("recal failed\n");
- MFM_DRV_INFO.cylinder = NEED_2_RECAL;
- if (cont) {
- cont->error();
- cont->redo();
- }
- return;
- }
- /* Thats seek end - we are finished */
- if (mfm_status & STAT_SED) {
- issue_command(CMD_POD, NULL, 0);
- MFM_DRV_INFO.cylinder = 0;
- mfm_seek();
- return;
- }
- /* Command end without seek end (see data sheet p.20) for parallel seek
- - we have to send a POL command to wait for the seek */
- if (mfm_status & STAT_CED) {
- do_mfm = mfm_recal_intr;
- issue_command(CMD_POL, NULL, 0);
- return;
- }
- printk("recal: unknown status\n");
-}
-
-static void mfm_seek_intr(void)
-{
-#ifdef DEBUG
- console_printf("seek intr - status = ");
- print_status();
-#endif
- outw(CMD_RCAL, MFM_COMMAND); /* Clear interrupt condition */
- if (mfm_status & (STAT_DER | STAT_ABN)) {
- printk("seek failed\n");
- MFM_DRV_INFO.cylinder = NEED_2_RECAL;
- if (cont) {
- cont->error();
- cont->redo();
- }
- return;
- }
- if (mfm_status & STAT_SED) {
- issue_command(CMD_POD, NULL, 0);
- MFM_DRV_INFO.cylinder = raw_cmd.cylinder;
- mfm_seek();
- return;
- }
- if (mfm_status & STAT_CED) {
- do_mfm = mfm_seek_intr;
- issue_command(CMD_POL, NULL, 0);
- return;
- }
- printk("seek: unknown status\n");
-}
-
-/* IDEA2 seems to work better - its what RiscOS sets my
- * disc to - on its SECOND call to specify!
- */
-#define IDEA2
-#ifndef IDEA2
-#define SPEC_SL 0x16
-#define SPEC_SH 0xa9 /* Step pulse high=21, Record Length=001 (256 bytes) */
-#else
-#define SPEC_SL 0x00 /* OM2 - SL - step pulse low */
-#define SPEC_SH 0x21 /* Step pulse high=4, Record Length=001 (256 bytes) */
-#endif
-
-static void mfm_setupspecify (int drive, unsigned char *cmdb)
-{
- cmdb[0] = 0x1f; /* OM0 - !SECT,!MOD,!DIF,PADP,ECD,CRCP,CRCI,ACOR */
- cmdb[1] = 0xc3; /* OM1 - DTM,BRST,!CEDM,!SEDM,!DERM,0,AMEX,PSK */
- cmdb[2] = SPEC_SL; /* OM2 - SL - step pulse low */
- cmdb[3] = (number_mfm_drives == 1) ? 0x02 : 0x06; /* 1 or 2 drives */
- cmdb[4] = 0xfc | ((mfm_info[drive].cylinders - 1) >> 8);/* RW time over/high part of number of cylinders */
- cmdb[5] = mfm_info[drive].cylinders - 1; /* low part of number of cylinders */
- cmdb[6] = mfm_info[drive].heads - 1; /* Number of heads */
- cmdb[7] = mfm_info[drive].sectors - 1; /* Number of sectors */
- cmdb[8] = SPEC_SH;
- cmdb[9] = 0x0a; /* gap length 1 */
- cmdb[10] = 0x0d; /* gap length 2 */
- cmdb[11] = 0x0c; /* gap length 3 */
- cmdb[12] = (mfm_info[drive].precomp - 1) >> 8; /* pre comp cylinder */
- cmdb[13] = mfm_info[drive].precomp - 1;
- cmdb[14] = (mfm_info[drive].lowcurrent - 1) >> 8; /* Low current cylinder */
- cmdb[15] = mfm_info[drive].lowcurrent - 1;
-}
-
-static void mfm_specify (void)
-{
- unsigned char cmdb[16];
-
- DBG("specify...dev=%d lastspecified=%d\n", raw_cmd.dev, lastspecifieddrive);
- mfm_setupspecify (raw_cmd.dev, cmdb);
-
- issue_command (CMD_SPC, cmdb, 16);
- /* Ensure that we will do another specify if we move to the other drive */
- lastspecifieddrive = raw_cmd.dev;
- wait_for_completion();
-}
-
-static void mfm_seek(void)
-{
- unsigned char cmdb[4];
-
- DBG("seeking...\n");
- if (MFM_DRV_INFO.cylinder < 0) {
- do_mfm = mfm_recal_intr;
- DBG("mfm_seek: about to call specify\n");
- mfm_specify (); /* DAG added this */
-
- cmdb[0] = raw_cmd.dev + 1;
- cmdb[1] = 0;
-
- issue_command(CMD_RCLB, cmdb, 2);
- return;
- }
- if (MFM_DRV_INFO.cylinder != raw_cmd.cylinder) {
- cmdb[0] = raw_cmd.dev + 1;
- cmdb[1] = 0; /* raw_cmd.head; DAG: My data sheet says this should be 0 */
- cmdb[2] = raw_cmd.cylinder >> 8;
- cmdb[3] = raw_cmd.cylinder;
-
- do_mfm = mfm_seek_intr;
- issue_command(CMD_SEK, cmdb, 4);
- } else
- mfm_setup_rw();
-}
-
-static void mfm_initialise(void)
-{
- DBG("init...\n");
- mfm_seek();
-}
-
-static void request_done(int uptodate)
-{
- DBG("mfm:request_done\n");
- if (uptodate) {
- unsigned char block[2] = {0, 0};
-
- /* Apparently worked - let's check bytes left to DMA */
- if (hdc63463_dataleft != (PartFragRead_SectorsLeft * 256)) {
- printk("mfm: request_done - dataleft=%d - should be %d - Eek!\n", hdc63463_dataleft, PartFragRead_SectorsLeft * 256);
- end_request(CURRENT, 0);
- Busy = 0;
- };
- /* Potentially this means that we've done; but we might be doing
- a partial access, (over two cylinders) or we may have a number
- of fragments in an image file. First let's deal with partial accesss
- */
- if (PartFragRead) {
- /* Yep - a partial access */
-
- /* and issue the remainder */
- issue_request(PartFragRead_RestartBlock, PartFragRead_SectorsLeft, CURRENT);
- return;
- }
-
- /* ah well - perhaps there is another fragment to go */
-
- /* Increment pointers/counts to start of next fragment */
- if (SectorsLeftInRequest > 0) printk("mfm: SectorsLeftInRequest>0 - Eek! Shouldn't happen!\n");
-
- /* No - its the end of the line */
- /* end_request's should have happened at the end of sector DMAs */
- /* Turns Drive LEDs off - may slow it down? */
- if (!elv_next_request(QUEUE))
- issue_command(CMD_CKV, block, 2);
-
- Busy = 0;
- DBG("request_done: About to mfm_request\n");
- /* Next one please */
- mfm_request(); /* Moved from mfm_rw_intr */
- DBG("request_done: returned from mfm_request\n");
- } else {
- printk("mfm:request_done: update=0\n");
- end_request(CURRENT, 0);
- Busy = 0;
- }
-}
-
-static void error_handler(void)
-{
- printk("error detected... status = ");
- print_status();
- (*errors)++;
- if (*errors > MFM_DRV_INFO.errors.abort)
- cont->done(0);
- if (*errors > MFM_DRV_INFO.errors.recal)
- MFM_DRV_INFO.cylinder = NEED_2_RECAL;
-}
-
-static void rw_interrupt(void)
-{
- printk("rw_interrupt\n");
-}
-
-static struct cont rw_cont =
-{
- rw_interrupt,
- error_handler,
- mfm_rerequest,
- request_done
-};
-
-/*
- * Actually gets round to issuing the request - note everything at this
- * point is in 256 byte sectors not Linux 512 byte blocks
- */
-static void issue_request(unsigned int block, unsigned int nsect,
- struct request *req)
-{
- struct gendisk *disk = req->rq_disk;
- struct mfm_info *p = disk->private_data;
- int track, start_head, start_sector;
- int sectors_to_next_cyl;
- dev = p - mfm_info;
-
- track = block / p->sectors;
- start_sector = block % p->sectors;
- start_head = track % p->heads;
-
- /* First get the number of whole tracks which are free before the next
- track */
- sectors_to_next_cyl = (p->heads - (start_head + 1)) * p->sectors;
- /* Then add in the number of sectors left on this track */
- sectors_to_next_cyl += (p->sectors - start_sector);
-
- DBG("issue_request: mfm_info[dev].sectors=%d track=%d\n", p->sectors, track);
-
- raw_cmd.dev = dev;
- raw_cmd.sector = start_sector;
- raw_cmd.head = start_head;
- raw_cmd.cylinder = track / p->heads;
- raw_cmd.cmdtype = CURRENT->cmd;
- raw_cmd.cmdcode = rq_data_dir(CURRENT) == WRITE ? CMD_WD : CMD_RD;
- raw_cmd.cmddata[0] = dev + 1; /* DAG: +1 to get US */
- raw_cmd.cmddata[1] = raw_cmd.head;
- raw_cmd.cmddata[2] = raw_cmd.cylinder >> 8;
- raw_cmd.cmddata[3] = raw_cmd.cylinder;
- raw_cmd.cmddata[4] = raw_cmd.head;
- raw_cmd.cmddata[5] = raw_cmd.sector;
-
- /* Was == and worked - how the heck??? */
- if (lastspecifieddrive != raw_cmd.dev)
- mfm_specify ();
-
- if (nsect <= sectors_to_next_cyl) {
- raw_cmd.cmddata[6] = nsect >> 8;
- raw_cmd.cmddata[7] = nsect;
- PartFragRead = 0; /* All in one */
- PartFragRead_SectorsLeft = 0; /* Must set this - used in DMA calcs */
- } else {
- raw_cmd.cmddata[6] = sectors_to_next_cyl >> 8;
- raw_cmd.cmddata[7] = sectors_to_next_cyl;
- PartFragRead = sectors_to_next_cyl; /* only do this many this time */
- PartFragRead_RestartBlock = block + sectors_to_next_cyl; /* Where to restart from */
- PartFragRead_SectorsLeft = nsect - sectors_to_next_cyl;
- }
- raw_cmd.cmdlen = 8;
-
- /* Setup DMA pointers */
- hdc63463_dataptr = (unsigned int) Copy_buffer;
- hdc63463_dataleft = nsect * 256; /* Better way? */
-
- DBG("mfm%c: %sing: CHS=%d/%d/%d, sectors=%d, buffer=0x%08lx (%p)\n",
- raw_cmd.dev + 'a', rq_data_dir(CURRENT) == READ ? "read" : "writ",
- raw_cmd.cylinder,
- raw_cmd.head,
- raw_cmd.sector, nsect, (unsigned long) Copy_buffer, CURRENT);
-
- cont = &rw_cont;
- errors = &(CURRENT->errors);
-#if 0
- mfm_tq.routine = (void (*)(void *)) mfm_initialise;
- queue_task(&mfm_tq, &tq_immediate);
- mark_bh(IMMEDIATE_BH);
-#else
- mfm_initialise();
-#endif
-} /* issue_request */
-
-/*
- * Called when an error has just happened - need to trick mfm_request
- * into thinking we weren't busy
- *
- * Turn off ints - mfm_request expects them this way
- */
-static void mfm_rerequest(void)
-{
- DBG("mfm_rerequest\n");
- cli();
- Busy = 0;
- mfm_request();
-}
-
-static struct gendisk *mfm_gendisk[2];
-
-static void mfm_request(void)
-{
- DBG("mfm_request CURRENT=%p Busy=%d\n", CURRENT, Busy);
-
- /* If we are still processing then return; we will get called again */
- if (Busy) {
- /* Again seems to be common in 1.3.45 */
- /*DBG*/printk("mfm_request: Exiting due to busy\n");
- return;
- }
- Busy = 1;
-
- while (1) {
- unsigned int block, nsect;
- struct gendisk *disk;
-
- DBG("mfm_request: loop start\n");
- sti();
-
- DBG("mfm_request: before !CURRENT\n");
-
- if (!CURRENT) {
- printk("mfm_request: Exiting due to empty queue (pre)\n");
- do_mfm = NULL;
- Busy = 0;
- return;
- }
-
- DBG("mfm_request: before arg extraction\n");
-
- disk = CURRENT->rq_disk;
- block = CURRENT->sector;
- nsect = CURRENT->nr_sectors;
- if (block >= get_capacity(disk) ||
- block+nsect > get_capacity(disk)) {
- printk("%s: bad access: block=%d, count=%d, nr_sects=%ld\n",
- disk->disk_name, block, nsect, get_capacity(disk));
- printk("mfm: continue 1\n");
- end_request(CURRENT, 0);
- Busy = 0;
- continue;
- }
-
- /* DAG: Linux doesn't cope with this - even though it has an array telling
- it the hardware block size - silly */
- block <<= 1; /* Now in 256 byte sectors */
- nsect <<= 1; /* Ditto */
-
- SectorsLeftInRequest = nsect >> 1;
- Sectors256LeftInCurrent = CURRENT->current_nr_sectors * 2;
- Copy_buffer = CURRENT->buffer;
- Copy_Sector = CURRENT->sector << 1;
-
- DBG("mfm_request: block after offset=%d\n", block);
-
- issue_request(block, nsect, CURRENT);
-
- break;
- }
- DBG("mfm_request: Dropping out bottom\n");
-}
-
-static void do_mfm_request(struct request_queue *q)
-{
- DBG("do_mfm_request: about to mfm_request\n");
- mfm_request();
-}
-
-static void mfm_interrupt_handler(int unused, void *dev_id)
-{
- void (*handler) (void) = do_mfm;
-
- do_mfm = NULL;
-
- DBG("mfm_interrupt_handler (handler=0x%p)\n", handler);
-
- mfm_status = inw(MFM_STATUS);
-
- /* If CPR (Command Parameter Reject) and not busy it means that the command
- has some return message to give us */
- if ((mfm_status & (STAT_CPR | STAT_BSY)) == STAT_CPR) {
- int len = 0;
- while (len < 16) {
- int in;
- in = inw(MFM_DATAIN);
- result[len++] = in >> 8;
- result[len++] = in;
- }
- }
- if (handler) {
- handler();
- return;
- }
- outw (CMD_RCAL, MFM_COMMAND); /* Clear interrupt condition */
- printk ("mfm: unexpected interrupt - status = ");
- print_status ();
- while (1);
-}
-
-
-
-
-
-/*
- * Tell the user about the drive if we decided it exists.
- */
-static void mfm_geometry(int drive)
-{
- struct mfm_info *p = mfm_info + drive;
- struct gendisk *disk = mfm_gendisk[drive];
- disk->private_data = p;
- if (p->cylinders)
- printk ("%s: %dMB CHS=%d/%d/%d LCC=%d RECOMP=%d\n",
- disk->disk_name,
- p->cylinders * p->heads * p->sectors / 4096,
- p->cylinders, p->heads, p->sectors,
- p->lowcurrent, p->precomp);
- set_capacity(disk, p->cylinders * p->heads * p->sectors / 2);
-}
-
-#ifdef CONFIG_BLK_DEV_MFM_AUTODETECT
-/*
- * Attempt to detect a drive and find its geometry. The drive has already been
- * specified...
- *
- * We first recalibrate the disk, then try to probe sectors, heads and then
- * cylinders. NOTE! the cylinder probe may break drives. The xd disk driver
- * does something along these lines, so I assume that most drives are up to
- * this mistreatment...
- */
-static int mfm_detectdrive (int drive)
-{
- unsigned int mingeo[3], maxgeo[3];
- unsigned int attribute, need_recal = 1;
- unsigned char cmdb[8];
-
- memset (mingeo, 0, sizeof (mingeo));
- maxgeo[0] = mfm_info[drive].sectors;
- maxgeo[1] = mfm_info[drive].heads;
- maxgeo[2] = mfm_info[drive].cylinders;
-
- cmdb[0] = drive + 1;
- cmdb[6] = 0;
- cmdb[7] = 1;
- for (attribute = 0; attribute < 3; attribute++) {
- while (mingeo[attribute] != maxgeo[attribute]) {
- unsigned int variable;
-
- variable = (maxgeo[attribute] + mingeo[attribute]) >> 1;
- cmdb[1] = cmdb[2] = cmdb[3] = cmdb[4] = cmdb[5] = 0;
-
- if (need_recal) {
- int tries = 5;
-
- do {
- issue_command (CMD_RCLB, cmdb, 2);
- wait_for_completion ();
- wait_for_command_end ();
- if (result[1] == 0x20)
- break;
- } while (result[1] && --tries);
- if (result[1]) {
- outw (CMD_RCAL, MFM_COMMAND);
- return 0;
- }
- need_recal = 0;
- }
-
- switch (attribute) {
- case 0:
- cmdb[5] = variable;
- issue_command (CMD_CMPD, cmdb, 8);
- break;
- case 1:
- cmdb[1] = variable;
- cmdb[4] = variable;
- issue_command (CMD_CMPD, cmdb, 8);
- break;
- case 2:
- cmdb[2] = variable >> 8;
- cmdb[3] = variable;
- issue_command (CMD_SEK, cmdb, 4);
- break;
- }
- wait_for_completion ();
- wait_for_command_end ();
-
- switch (result[1]) {
- case 0x00:
- case 0x50:
- mingeo[attribute] = variable + 1;
- break;
-
- case 0x20:
- outw (CMD_RCAL, MFM_COMMAND);
- return 0;
-
- case 0x24:
- need_recal = 1;
- default:
- maxgeo[attribute] = variable;
- break;
- }
- }
- }
- mfm_info[drive].cylinders = mingeo[2];
- mfm_info[drive].lowcurrent = mingeo[2];
- mfm_info[drive].precomp = mingeo[2] / 2;
- mfm_info[drive].heads = mingeo[1];
- mfm_info[drive].sectors = mingeo[0];
- outw (CMD_RCAL, MFM_COMMAND);
- return 1;
-}
-#endif
-
-/*
- * Initialise all drive information for this controller.
- */
-static int mfm_initdrives(void)
-{
- int drive;
-
- if (number_mfm_drives > MFM_MAXDRIVES) {
- number_mfm_drives = MFM_MAXDRIVES;
- printk("No. of ADFS MFM drives is greater than MFM_MAXDRIVES - you can't have that many!\n");
- }
-
- for (drive = 0; drive < number_mfm_drives; drive++) {
- mfm_info[drive].lowcurrent = 1;
- mfm_info[drive].precomp = 1;
- mfm_info[drive].cylinder = -1;
- mfm_info[drive].errors.recal = 0;
- mfm_info[drive].errors.report = 0;
- mfm_info[drive].errors.abort = 4;
-
-#ifdef CONFIG_BLK_DEV_MFM_AUTODETECT
- mfm_info[drive].cylinders = 1024;
- mfm_info[drive].heads = 8;
- mfm_info[drive].sectors = 64;
- {
- unsigned char cmdb[16];
-
- mfm_setupspecify (drive, cmdb);
- cmdb[1] &= ~0x81;
- issue_command (CMD_SPC, cmdb, 16);
- wait_for_completion ();
- if (!mfm_detectdrive (drive)) {
- mfm_info[drive].cylinders = 0;
- mfm_info[drive].heads = 0;
- mfm_info[drive].sectors = 0;
- }
- cmdb[0] = cmdb[1] = 0;
- issue_command (CMD_CKV, cmdb, 2);
- }
-#else
- mfm_info[drive].cylinders = 1; /* its going to have to figure it out from the partition info */
- mfm_info[drive].heads = 4;
- mfm_info[drive].sectors = 32;
-#endif
- }
- return number_mfm_drives;
-}
-
-
-
-/*
- * The 'front' end of the mfm driver follows...
- */
-
-static int mfm_getgeo(struct block_device *bdev, struct hd_geometry *geo)
-{
- struct mfm_info *p = bdev->bd_disk->private_data;
-
- geo->heads = p->heads;
- geo->sectors = p->sectors;
- geo->cylinders = p->cylinders;
- return 0;
-}
-
-/*
- * This is to handle various kernel command line parameters
- * specific to this driver.
- */
-void mfm_setup(char *str, int *ints)
-{
- return;
-}
-
-/*
- * Set the CHS from the ADFS boot block if it is present. This is not ideal
- * since if there are any non-ADFS partitions on the disk, this won't work!
- * Hence, I want to get rid of this...
- */
-void xd_set_geometry(struct block_device *bdev, unsigned char secsptrack,
- unsigned char heads, unsigned int secsize)
-{
- struct mfm_info *p = bdev->bd_disk->private_data;
- int drive = p - mfm_info;
- unsigned long disksize = bdev->bd_inode->i_size;
-
- if (p->cylinders == 1) {
- p->sectors = secsptrack;
- p->heads = heads;
- p->cylinders = discsize / (secsptrack * heads * secsize);
-
- if ((heads < 1) || (p->cylinders > 1024)) {
- printk("%s: Insane disc shape! Setting to 512/4/32\n",
- bdev->bd_disk->disk_name);
-
- /* These values are fairly arbitary, but are there so that if your
- * lucky you can pick apart your disc to find out what is going on -
- * I reckon these figures won't hurt MOST drives
- */
- p->sectors = 32;
- p->heads = 4;
- p->cylinders = 512;
- }
- if (raw_cmd.dev == drive)
- mfm_specify ();
- mfm_geometry (drive);
- }
-}
-
-static struct block_device_operations mfm_fops =
-{
- .owner = THIS_MODULE,
- .getgeo = mfm_getgeo,
-};
-
-/*
- * See if there is a controller at the address presently at mfm_addr
- *
- * We check to see if the controller is busy - if it is, we abort it first,
- * and check that the chip is no longer busy after at least 180 clock cycles.
- * We then issue a command and check that the BSY or CPR bits are set.
- */
-static int mfm_probecontroller (unsigned int mfm_addr)
-{
- if (inw (MFM_STATUS) & STAT_BSY) {
- outw (CMD_ABT, MFM_COMMAND);
- udelay (50);
- if (inw (MFM_STATUS) & STAT_BSY)
- return 0;
- }
-
- if (inw (MFM_STATUS) & STAT_CED)
- outw (CMD_RCAL, MFM_COMMAND);
-
- outw (CMD_SEK, MFM_COMMAND);
-
- if (inw (MFM_STATUS) & (STAT_BSY | STAT_CPR)) {
- unsigned int count = 2000;
- while (inw (MFM_STATUS) & STAT_BSY) {
- udelay (500);
- if (!--count)
- return 0;
- }
-
- outw (CMD_RCAL, MFM_COMMAND);
- }
- return 1;
-}
-
-static int mfm_do_init(unsigned char irqmask)
-{
- int i, ret;
-
- printk("mfm: found at address %08X, interrupt %d\n", mfm_addr, mfm_irq);
-
- ret = -EBUSY;
- if (!request_region (mfm_addr, 10, "mfm"))
- goto out1;
-
- ret = register_blkdev(MAJOR_NR, "mfm");
- if (ret)
- goto out2;
-
- /* Stuff for the assembler routines to get to */
- hdc63463_baseaddress = ioaddr(mfm_addr);
- hdc63463_irqpolladdress = mfm_IRQPollLoc;
- hdc63463_irqpollmask = irqmask;
-
- mfm_queue = blk_init_queue(do_mfm_request, &mfm_lock);
- if (!mfm_queue)
- goto out2a;
-
- Busy = 0;
- lastspecifieddrive = -1;
-
- mfm_drives = mfm_initdrives();
- if (!mfm_drives) {
- ret = -ENODEV;
- goto out3;
- }
-
- for (i = 0; i < mfm_drives; i++) {
- struct gendisk *disk = alloc_disk(64);
- if (!disk)
- goto Enomem;
- disk->major = MAJOR_NR;
- disk->first_minor = i << 6;
- disk->fops = &mfm_fops;
- sprintf(disk->disk_name, "mfm%c", 'a'+i);
- mfm_gendisk[i] = disk;
- }
-
- printk("mfm: detected %d hard drive%s\n", mfm_drives,
- mfm_drives == 1 ? "" : "s");
- ret = request_irq(mfm_irq, mfm_interrupt_handler, IRQF_DISABLED, "MFM harddisk", NULL);
- if (ret) {
- printk("mfm: unable to get IRQ%d\n", mfm_irq);
- goto out4;
- }
-
- if (mfm_irqenable)
- outw(0x80, mfm_irqenable); /* Required to enable IRQs from MFM podule */
-
- for (i = 0; i < mfm_drives; i++) {
- mfm_geometry(i);
- mfm_gendisk[i]->queue = mfm_queue;
- add_disk(mfm_gendisk[i]);
- }
- return 0;
-
-out4:
- for (i = 0; i < mfm_drives; i++)
- put_disk(mfm_gendisk[i]);
-out3:
- blk_cleanup_queue(mfm_queue);
-out2a:
- unregister_blkdev(MAJOR_NR, "mfm");
-out2:
- release_region(mfm_addr, 10);
-out1:
- return ret;
-Enomem:
- while (i--)
- put_disk(mfm_gendisk[i]);
- goto out3;
-}
-
-static void mfm_do_exit(void)
-{
- int i;
-
- free_irq(mfm_irq, NULL);
- for (i = 0; i < mfm_drives; i++) {
- del_gendisk(mfm_gendisk[i]);
- put_disk(mfm_gendisk[i]);
- }
- blk_cleanup_queue(mfm_queue);
- unregister_blkdev(MAJOR_NR, "mfm");
- if (mfm_addr)
- release_region(mfm_addr, 10);
-}
-
-static int __devinit mfm_probe(struct expansion_card *ec, struct ecard_id *id)
-{
- if (mfm_addr)
- return -EBUSY;
-
- mfm_addr = ecard_address(ec, ECARD_IOC, ECARD_MEDIUM) + 0x800;
- mfm_IRQPollLoc = ioaddr(mfm_addr + 0x400);
- mfm_irqenable = mfm_IRQPollLoc;
- mfm_irq = ec->irq;
-
- return mfm_do_init(0x08);
-}
-
-static void __devexit mfm_remove(struct expansion_card *ec)
-{
- outw (0, mfm_irqenable); /* Required to enable IRQs from MFM podule */
- mfm_do_exit();
-}
-
-static const struct ecard_id mfm_cids[] = {
- { MANU_ACORN, PROD_ACORN_MFM },
- { 0xffff, 0xffff },
-};
-
-static struct ecard_driver mfm_driver = {
- .probe = mfm_probe,
- .remove = __devexit(mfm_remove),
- .id_table = mfm_cids,
- .drv = {
- .name = "mfm",
- },
-};
-
-/*
- * Look for a MFM controller - first check the motherboard, then the podules
- * The podules have an extra interrupt enable that needs to be played with
- *
- * The HDC is accessed at MEDIUM IOC speeds.
- */
-static int __init mfm_init (void)
-{
- unsigned char irqmask;
-
- if (mfm_probecontroller(ONBOARD_MFM_ADDRESS)) {
- mfm_addr = ONBOARD_MFM_ADDRESS;
- mfm_IRQPollLoc = IOC_IRQSTATB;
- mfm_irqenable = 0;
- mfm_irq = IRQ_HARDDISK;
- return mfm_do_init(0x08); /* IL3 pin */
- } else {
- return ecard_register_driver(&mfm_driver);
- }
-}
-
-static void __exit mfm_exit(void)
-{
- if (mfm_addr == ONBOARD_MFM_ADDRESS)
- mfm_do_exit();
- else
- ecard_unregister_driver(&mfm_driver);
-}
-
-module_init(mfm_init)
-module_exit(mfm_exit)
-MODULE_LICENSE("GPL");
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-11 09:04:51 +0000