Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/drivers/block/ataflop.c b/drivers/block/ataflop.c
new file mode 100644
index 0000000..db05a5a
--- /dev/null
+++ b/drivers/block/ataflop.c
@@ -0,0 +1,2006 @@
+/*
+ * drivers/block/ataflop.c
+ *
+ * Copyright (C) 1993 Greg Harp
+ * Atari Support by Bjoern Brauel, Roman Hodek
+ *
+ * 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 FDCCMDADD_H flag since
+ * the FDC will otherwise wait forever when no disk is inserted...
+ *
+ * ++ Freddi Aschwanden (fa) 20.9.95 fixes for medusa:
+ * - MFPDELAY() after each FDC access -> atari
+ * - more/other disk formats
+ * - DMA to the block buffer directly if we have a 32bit DMA
+ * - for medusa, the step rate is always 3ms
+ * - on medusa, use only cache_push()
+ * Roman:
+ * - Make disk format numbering independent from minors
+ * - Let user set max. supported drive type (speeds up format
+ * detection, saves buffer space)
+ *
+ * Roman 10/15/95:
+ * - implement some more ioctls
+ * - disk formatting
+ *
+ * Andreas 95/12/12:
+ * - increase gap size at start of track for HD/ED disks
+ *
+ * Michael (MSch) 11/07/96:
+ * - implemented FDSETPRM and FDDEFPRM ioctl
+ *
+ * Andreas (97/03/19):
+ * - implemented missing BLK* ioctls
+ *
+ * Things left to do:
+ * - Formatting
+ * - Maybe a better strategy for disk change detection (does anyone
+ * know one?)
+ */
+
+#include <linux/module.h>
+
+#include <linux/fd.h>
+#include <linux/delay.h>
+#include <linux/init.h>
+#include <linux/blkdev.h>
+
+#include <asm/atafd.h>
+#include <asm/atafdreg.h>
+#include <asm/atariints.h>
+#include <asm/atari_stdma.h>
+#include <asm/atari_stram.h>
+
+#define FD_MAX_UNITS 2
+
+#undef DEBUG
+
+static struct request_queue *floppy_queue;
+
+#define QUEUE (floppy_queue)
+#define CURRENT elv_next_request(floppy_queue)
+
+/* Disk types: DD, HD, ED */
+static struct atari_disk_type {
+ const char *name;
+ unsigned spt; /* sectors per track */
+ unsigned blocks; /* total number of blocks */
+ unsigned fdc_speed; /* fdc_speed setting */
+ unsigned stretch; /* track doubling ? */
+} disk_type[] = {
+ { "d360", 9, 720, 0, 0}, /* 0: 360kB diskette */
+ { "D360", 9, 720, 0, 1}, /* 1: 360kb in 720k or 1.2MB drive */
+ { "D720", 9,1440, 0, 0}, /* 2: 720kb in 720k or 1.2MB drive */
+ { "D820", 10,1640, 0, 0}, /* 3: DD disk with 82 tracks/10 sectors */
+/* formats above are probed for type DD */
+#define MAX_TYPE_DD 3
+ { "h1200",15,2400, 3, 0}, /* 4: 1.2MB diskette */
+ { "H1440",18,2880, 3, 0}, /* 5: 1.4 MB diskette (HD) */
+ { "H1640",20,3280, 3, 0}, /* 6: 1.64MB diskette (fat HD) 82 tr 20 sec */
+/* formats above are probed for types DD and HD */
+#define MAX_TYPE_HD 6
+ { "E2880",36,5760, 3, 0}, /* 7: 2.8 MB diskette (ED) */
+ { "E3280",40,6560, 3, 0}, /* 8: 3.2 MB diskette (fat ED) 82 tr 40 sec */
+/* formats above are probed for types DD, HD and ED */
+#define MAX_TYPE_ED 8
+/* types below are never autoprobed */
+ { "H1680",21,3360, 3, 0}, /* 9: 1.68MB diskette (fat HD) 80 tr 21 sec */
+ { "h410",10,820, 0, 1}, /* 10: 410k diskette 41 tr 10 sec, stretch */
+ { "h1476",18,2952, 3, 0}, /* 11: 1.48MB diskette 82 tr 18 sec */
+ { "H1722",21,3444, 3, 0}, /* 12: 1.72MB diskette 82 tr 21 sec */
+ { "h420",10,840, 0, 1}, /* 13: 420k diskette 42 tr 10 sec, stretch */
+ { "H830",10,1660, 0, 0}, /* 14: 820k diskette 83 tr 10 sec */
+ { "h1494",18,2952, 3, 0}, /* 15: 1.49MB diskette 83 tr 18 sec */
+ { "H1743",21,3486, 3, 0}, /* 16: 1.74MB diskette 83 tr 21 sec */
+ { "h880",11,1760, 0, 0}, /* 17: 880k diskette 80 tr 11 sec */
+ { "D1040",13,2080, 0, 0}, /* 18: 1.04MB diskette 80 tr 13 sec */
+ { "D1120",14,2240, 0, 0}, /* 19: 1.12MB diskette 80 tr 14 sec */
+ { "h1600",20,3200, 3, 0}, /* 20: 1.60MB diskette 80 tr 20 sec */
+ { "H1760",22,3520, 3, 0}, /* 21: 1.76MB diskette 80 tr 22 sec */
+ { "H1920",24,3840, 3, 0}, /* 22: 1.92MB diskette 80 tr 24 sec */
+ { "E3200",40,6400, 3, 0}, /* 23: 3.2MB diskette 80 tr 40 sec */
+ { "E3520",44,7040, 3, 0}, /* 24: 3.52MB diskette 80 tr 44 sec */
+ { "E3840",48,7680, 3, 0}, /* 25: 3.84MB diskette 80 tr 48 sec */
+ { "H1840",23,3680, 3, 0}, /* 26: 1.84MB diskette 80 tr 23 sec */
+ { "D800",10,1600, 0, 0}, /* 27: 800k diskette 80 tr 10 sec */
+};
+
+static int StartDiskType[] = {
+ MAX_TYPE_DD,
+ MAX_TYPE_HD,
+ MAX_TYPE_ED
+};
+
+#define TYPE_DD 0
+#define TYPE_HD 1
+#define TYPE_ED 2
+
+static int DriveType = TYPE_HD;
+
+static DEFINE_SPINLOCK(ataflop_lock);
+
+/* Array for translating minors into disk formats */
+static struct {
+ int index;
+ unsigned drive_types;
+} minor2disktype[] = {
+ { 0, TYPE_DD }, /* 1: d360 */
+ { 4, TYPE_HD }, /* 2: h1200 */
+ { 1, TYPE_DD }, /* 3: D360 */
+ { 2, TYPE_DD }, /* 4: D720 */
+ { 1, TYPE_DD }, /* 5: h360 = D360 */
+ { 2, TYPE_DD }, /* 6: h720 = D720 */
+ { 5, TYPE_HD }, /* 7: H1440 */
+ { 7, TYPE_ED }, /* 8: E2880 */
+/* some PC formats :-) */
+ { 8, TYPE_ED }, /* 9: E3280 <- was "CompaQ" == E2880 for PC */
+ { 5, TYPE_HD }, /* 10: h1440 = H1440 */
+ { 9, TYPE_HD }, /* 11: H1680 */
+ { 10, TYPE_DD }, /* 12: h410 */
+ { 3, TYPE_DD }, /* 13: H820 <- == D820, 82x10 */
+ { 11, TYPE_HD }, /* 14: h1476 */
+ { 12, TYPE_HD }, /* 15: H1722 */
+ { 13, TYPE_DD }, /* 16: h420 */
+ { 14, TYPE_DD }, /* 17: H830 */
+ { 15, TYPE_HD }, /* 18: h1494 */
+ { 16, TYPE_HD }, /* 19: H1743 */
+ { 17, TYPE_DD }, /* 20: h880 */
+ { 18, TYPE_DD }, /* 21: D1040 */
+ { 19, TYPE_DD }, /* 22: D1120 */
+ { 20, TYPE_HD }, /* 23: h1600 */
+ { 21, TYPE_HD }, /* 24: H1760 */
+ { 22, TYPE_HD }, /* 25: H1920 */
+ { 23, TYPE_ED }, /* 26: E3200 */
+ { 24, TYPE_ED }, /* 27: E3520 */
+ { 25, TYPE_ED }, /* 28: E3840 */
+ { 26, TYPE_HD }, /* 29: H1840 */
+ { 27, TYPE_DD }, /* 30: D800 */
+ { 6, TYPE_HD }, /* 31: H1640 <- was H1600 == h1600 for PC */
+};
+
+#define NUM_DISK_MINORS (sizeof(minor2disktype)/sizeof(*minor2disktype))
+
+/*
+ * Maximum disk size (in kilobytes). This default is used whenever the
+ * current disk size is unknown.
+ */
+#define MAX_DISK_SIZE 3280
+
+/*
+ * MSch: User-provided type information. 'drive' points to
+ * the respective entry of this array. Set by FDSETPRM ioctls.
+ */
+static struct atari_disk_type user_params[FD_MAX_UNITS];
+
+/*
+ * User-provided permanent type information. 'drive' points to
+ * the respective entry of this array. Set by FDDEFPRM ioctls,
+ * restored upon disk change by floppy_revalidate() if valid (as seen by
+ * default_params[].blocks > 0 - a bit in unit[].flags might be used for this?)
+ */
+static struct atari_disk_type default_params[FD_MAX_UNITS];
+
+/* current info on each unit */
+static struct atari_floppy_struct {
+ int connected; /* !=0 : drive is connected */
+ int autoprobe; /* !=0 : do autoprobe */
+
+ struct atari_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) */
+ int flags; /* flags */
+ struct gendisk *disk;
+ int ref;
+ int type;
+} unit[FD_MAX_UNITS];
+
+#define UD unit[drive]
+#define UDT unit[drive].disktype
+#define SUD unit[SelectedDrive]
+#define SUDT unit[SelectedDrive].disktype
+
+
+#define FDC_READ(reg) ({ \
+ /* unsigned long __flags; */ \
+ unsigned short __val; \
+ /* local_irq_save(__flags); */ \
+ dma_wd.dma_mode_status = 0x80 | (reg); \
+ udelay(25); \
+ __val = dma_wd.fdc_acces_seccount; \
+ MFPDELAY(); \
+ /* local_irq_restore(__flags); */ \
+ __val & 0xff; \
+})
+
+#define FDC_WRITE(reg,val) \
+ do { \
+ /* unsigned long __flags; */ \
+ /* local_irq_save(__flags); */ \
+ dma_wd.dma_mode_status = 0x80 | (reg); \
+ udelay(25); \
+ dma_wd.fdc_acces_seccount = (val); \
+ MFPDELAY(); \
+ /* local_irq_restore(__flags); */ \
+ } while(0)
+
+
+/* Buffering variables:
+ * First, there is a DMA buffer in ST-RAM that is used for floppy DMA
+ * operations. Second, a track buffer is used to cache a whole track
+ * of the disk to save read operations. These are two separate buffers
+ * because that allows write operations without clearing the track buffer.
+ */
+
+static int MaxSectors[] = {
+ 11, 22, 44
+};
+static int BufferSize[] = {
+ 15*512, 30*512, 60*512
+};
+
+#define BUFFER_SIZE (BufferSize[DriveType])
+
+unsigned char *DMABuffer; /* buffer for writes */
+static unsigned long PhysDMABuffer; /* physical address */
+
+static int UseTrackbuffer = -1; /* Do track buffering? */
+MODULE_PARM(UseTrackbuffer, "i");
+
+unsigned char *TrackBuffer; /* buffer for reads */
+static unsigned long PhysTrackBuffer; /* 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))
+
+/*
+ * 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;
+static int IsFormatting = 0, FormatError;
+
+static int UserSteprate[FD_MAX_UNITS] = { -1, -1 };
+MODULE_PARM(UserSteprate, "1-" __MODULE_STRING(FD_MAX_UNITS) "i");
+
+/* Synchronization of FDC access. */
+static volatile int fdc_busy = 0;
+static DECLARE_WAIT_QUEUE_HEAD(fdc_wait);
+static DECLARE_WAIT_QUEUE_HEAD(format_wait);
+
+static unsigned long changed_floppies = 0xff, fake_change = 0;
+#define CHECK_CHANGE_DELAY HZ/2
+
+#define FD_MOTOR_OFF_DELAY (3*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. */
+
+
+/*
+ * 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;
+
+
+#ifdef DEBUG
+#define DPRINT(a) printk a
+#else
+#define DPRINT(a)
+#endif
+
+/***************************** 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 irqreturn_t floppy_irq (int irq, void *dummy, struct pt_regs *fp);
+static void fd_error( void );
+static int do_format(int drive, int type, struct atari_format_descr *desc);
+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 );
+static void fd_readtrack_check( unsigned long dummy );
+static void fd_rwsec_done( int status );
+static void fd_rwsec_done1(int status);
+static void fd_writetrack( void );
+static void fd_writetrack_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 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 );
+
+/************************* End of Prototypes **************************/
+
+static struct timer_list motor_off_timer =
+ TIMER_INITIALIZER(fd_motor_off_timer, 0, 0);
+static struct timer_list readtrack_timer =
+ TIMER_INITIALIZER(fd_readtrack_check, 0, 0);
+
+static struct timer_list timeout_timer =
+ TIMER_INITIALIZER(fd_times_out, 0, 0);
+
+static struct timer_list fd_timer =
+ TIMER_INITIALIZER(check_change, 0, 0);
+
+static inline void start_motor_off_timer(void)
+{
+ mod_timer(&motor_off_timer, jiffies + FD_MOTOR_OFF_DELAY);
+ MotorOffTrys = 0;
+}
+
+static inline void start_check_change_timer( void )
+{
+ mod_timer(&fd_timer, jiffies + CHECK_CHANGE_DELAY);
+}
+
+static inline void start_timeout(void)
+{
+ mod_timer(&timeout_timer, jiffies + FLOPPY_TIMEOUT);
+}
+
+static inline void stop_timeout(void)
+{
+ del_timer(&timeout_timer);
+}
+
+/* Select the side to use. */
+
+static void fd_select_side( int side )
+{
+ unsigned long flags;
+
+ /* protect against various other ints mucking around with the PSG */
+ local_irq_save(flags);
+
+ sound_ym.rd_data_reg_sel = 14; /* Select PSG Port A */
+ sound_ym.wd_data = (side == 0) ? sound_ym.rd_data_reg_sel | 0x01 :
+ sound_ym.rd_data_reg_sel & 0xfe;
+
+ local_irq_restore(flags);
+}
+
+
+/* Select a drive, update the FDC's track register and set the correct
+ * clock speed for this disk's type.
+ */
+
+static void fd_select_drive( int drive )
+{
+ unsigned long flags;
+ unsigned char tmp;
+
+ if (drive == SelectedDrive)
+ return;
+
+ /* protect against various other ints mucking around with the PSG */
+ local_irq_save(flags);
+ sound_ym.rd_data_reg_sel = 14; /* Select PSG Port A */
+ tmp = sound_ym.rd_data_reg_sel;
+ sound_ym.wd_data = (tmp | DSKDRVNONE) & ~(drive == 0 ? DSKDRV0 : DSKDRV1);
+ atari_dont_touch_floppy_select = 1;
+ local_irq_restore(flags);
+
+ /* restore track register to saved value */
+ FDC_WRITE( FDCREG_TRACK, UD.track );
+ udelay(25);
+
+ /* select 8/16 MHz */
+ if (UDT)
+ if (ATARIHW_PRESENT(FDCSPEED))
+ dma_wd.fdc_speed = UDT->fdc_speed;
+
+ SelectedDrive = drive;
+}
+
+
+/* Deselect both drives. */
+
+static void fd_deselect( void )
+{
+ unsigned long flags;
+
+ /* protect against various other ints mucking around with the PSG */
+ local_irq_save(flags);
+ atari_dont_touch_floppy_select = 0;
+ sound_ym.rd_data_reg_sel=14; /* Select PSG Port A */
+ sound_ym.wd_data = (sound_ym.rd_data_reg_sel |
+ (MACH_IS_FALCON ? 3 : 7)); /* no drives selected */
+ /* On Falcon, the drive B select line is used on the printer port, so
+ * leave it alone... */
+ SelectedDrive = -1;
+ local_irq_restore(flags);
+}
+
+
+/* This timer function deselects the drives when the FDC switched the
+ * motor off. The deselection cannot happen earlier because the FDC
+ * counts the index signals, which arrive only if one drive is selected.
+ */
+
+static void fd_motor_off_timer( unsigned long dummy )
+{
+ unsigned char status;
+
+ if (SelectedDrive < 0)
+ /* no drive selected, needn't deselect anyone */
+ return;
+
+ if (stdma_islocked())
+ goto retry;
+
+ status = FDC_READ( FDCREG_STATUS );
+
+ if (!(status & 0x80)) {
+ /* motor already turned off by FDC -> deselect drives */
+ MotorOn = 0;
+ fd_deselect();
+ return;
+ }
+ /* not yet off, try again */
+
+ retry:
+ /* Test again later; if tested too often, it seems there is no disk
+ * in the drive and the FDC 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...
+ */
+ mod_timer(&motor_off_timer,
+ jiffies + (MotorOffTrys++ < FD_MOTOR_OFF_MAXTRY ? HZ/20 : HZ/2));
+}
+
+
+/* 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;
+ unsigned char old_porta;
+ int stat;
+
+ if (++drive > 1 || !UD.connected)
+ drive = 0;
+
+ /* protect against various other ints mucking around with the PSG */
+ local_irq_save(flags);
+
+ if (!stdma_islocked()) {
+ sound_ym.rd_data_reg_sel = 14;
+ old_porta = sound_ym.rd_data_reg_sel;
+ sound_ym.wd_data = (old_porta | DSKDRVNONE) &
+ ~(drive == 0 ? DSKDRV0 : DSKDRV1);
+ stat = !!(FDC_READ( FDCREG_STATUS ) & FDCSTAT_WPROT);
+ sound_ym.wd_data = old_porta;
+
+ if (stat != UD.wpstat) {
+ DPRINT(( "wpstat[%d] = %d\n", drive, stat ));
+ UD.wpstat = stat;
+ set_bit (drive, &changed_floppies);
+ }
+ }
+ local_irq_restore(flags);
+
+ start_check_change_timer();
+}
+
+
+/* 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 = FDCCMDADD_E;
+}
+
+static inline int get_head_settle_flag(void)
+{
+ int tmp = HeadSettleFlag;
+ HeadSettleFlag = 0;
+ return( tmp );
+}
+
+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++;
+}
+
+
+
+
+/* General Interrupt Handling */
+
+static void (*FloppyIRQHandler)( int status ) = NULL;
+
+static irqreturn_t floppy_irq (int irq, void *dummy, struct pt_regs *fp)
+{
+ unsigned char status;
+ void (*handler)( int );
+
+ handler = xchg(&FloppyIRQHandler, NULL);
+
+ if (handler) {
+ nop();
+ status = FDC_READ( FDCREG_STATUS );
+ DPRINT(("FDC irq, status = %02x handler = %08lx\n",status,(unsigned long)handler));
+ handler( status );
+ }
+ else {
+ DPRINT(("FDC irq, no handler\n"));
+ }
+ return IRQ_HANDLED;
+}
+
+
+/* Error handling: If some error happened, retry some times, then
+ * recalibrate, then try again, and fail after MAX_ERRORS.
+ */
+
+static void fd_error( void )
+{
+ if (IsFormatting) {
+ IsFormatting = 0;
+ FormatError = 1;
+ wake_up( &format_wait );
+ return;
+ }
+
+ if (!CURRENT)
+ return;
+
+ CURRENT->errors++;
+ if (CURRENT->errors >= MAX_ERRORS) {
+ printk(KERN_ERR "fd%d: too many errors.\n", SelectedDrive );
+ end_request(CURRENT, 0);
+ }
+ else if (CURRENT->errors == RECALIBRATE_ERRORS) {
+ printk(KERN_WARNING "fd%d: recalibrating\n", SelectedDrive );
+ if (SelectedDrive != -1)
+ SUD.track = -1;
+ }
+ redo_fd_request();
+}
+
+
+
+#define SET_IRQ_HANDLER(proc) do { FloppyIRQHandler = (proc); } while(0)
+
+
+/* ---------- Formatting ---------- */
+
+#define FILL(n,val) \
+ do { \
+ memset( p, val, n ); \
+ p += n; \
+ } while(0)
+
+static int do_format(int drive, int type, struct atari_format_descr *desc)
+{
+ unsigned char *p;
+ int sect, nsect;
+ unsigned long flags;
+
+ DPRINT(("do_format( dr=%d tr=%d he=%d offs=%d )\n",
+ drive, desc->track, desc->head, desc->sect_offset ));
+
+ local_irq_save(flags);
+ while( fdc_busy ) sleep_on( &fdc_wait );
+ fdc_busy = 1;
+ stdma_lock(floppy_irq, NULL);
+ atari_turnon_irq( IRQ_MFP_FDC ); /* should be already, just to be sure */
+ local_irq_restore(flags);
+
+ if (type) {
+ if (--type >= NUM_DISK_MINORS ||
+ minor2disktype[type].drive_types > DriveType) {
+ redo_fd_request();
+ return -EINVAL;
+ }
+ type = minor2disktype[type].index;
+ UDT = &disk_type[type];
+ }
+
+ if (!UDT || desc->track >= UDT->blocks/UDT->spt/2 || desc->head >= 2) {
+ redo_fd_request();
+ return -EINVAL;
+ }
+
+ nsect = UDT->spt;
+ p = TrackBuffer;
+ /* The track buffer is used for the raw track data, so its
+ contents become invalid! */
+ BufferDrive = -1;
+ /* stop deselect timer */
+ del_timer( &motor_off_timer );
+
+ FILL( 60 * (nsect / 9), 0x4e );
+ for( sect = 0; sect < nsect; ++sect ) {
+ FILL( 12, 0 );
+ FILL( 3, 0xf5 );
+ *p++ = 0xfe;
+ *p++ = desc->track;
+ *p++ = desc->head;
+ *p++ = (nsect + sect - desc->sect_offset) % nsect + 1;
+ *p++ = 2;
+ *p++ = 0xf7;
+ FILL( 22, 0x4e );
+ FILL( 12, 0 );
+ FILL( 3, 0xf5 );
+ *p++ = 0xfb;
+ FILL( 512, 0xe5 );
+ *p++ = 0xf7;
+ FILL( 40, 0x4e );
+ }
+ FILL( TrackBuffer+BUFFER_SIZE-p, 0x4e );
+
+ IsFormatting = 1;
+ FormatError = 0;
+ ReqTrack = desc->track;
+ ReqSide = desc->head;
+ do_fd_action( drive );
+
+ sleep_on( &format_wait );
+
+ redo_fd_request();
+ return( FormatError ? -EIO : 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 )
+{
+ DPRINT(("do_fd_action\n"));
+
+ if (UseTrackbuffer && !IsFormatting) {
+ repeat:
+ if (IS_BUFFERED( drive, ReqSide, ReqTrack )) {
+ if (ReqCmd == READ) {
+ copy_buffer( SECTOR_BUFFER(ReqSector), ReqData );
+ if (++ReqCnt < CURRENT->current_nr_sectors) {
+ /* read next sector */
+ setup_req_params( drive );
+ goto repeat;
+ }
+ 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;
+ }
+ }
+ else {
+ /* cmd == WRITE, pay attention to track buffer
+ * consistency! */
+ copy_buffer( ReqData, SECTOR_BUFFER(ReqSector) );
+ }
+ }
+ }
+
+ if (SelectedDrive != drive)
+ fd_select_drive( drive );
+
+ if (UD.track == -1)
+ fd_calibrate();
+ else if (UD.track != ReqTrack << UDT->stretch)
+ fd_seek();
+ else if (IsFormatting)
+ fd_writetrack();
+ else
+ fd_rwsec();
+}
+
+
+/* Seek to track 0 if the current track is unknown */
+
+static void fd_calibrate( void )
+{
+ if (SUD.track >= 0) {
+ fd_calibrate_done( 0 );
+ return;
+ }
+
+ if (ATARIHW_PRESENT(FDCSPEED))
+ dma_wd.fdc_speed = 0; /* always seek with 8 Mhz */;
+ DPRINT(("fd_calibrate\n"));
+ SET_IRQ_HANDLER( fd_calibrate_done );
+ /* we can't verify, since the speed may be incorrect */
+ FDC_WRITE( FDCREG_CMD, FDCCMD_RESTORE | SUD.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 (ATARIHW_PRESENT(FDCSPEED))
+ dma_wd.fdc_speed = SUDT->fdc_speed;
+ if (status & FDCSTAT_RECNF) {
+ printk(KERN_ERR "fd%d: restore failed\n", SelectedDrive );
+ fd_error();
+ }
+ else {
+ SUD.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 )
+{
+ if (SUD.track == ReqTrack << SUDT->stretch) {
+ fd_seek_done( 0 );
+ return;
+ }
+
+ if (ATARIHW_PRESENT(FDCSPEED)) {
+ dma_wd.fdc_speed = 0; /* always seek witch 8 Mhz */
+ MFPDELAY();
+ }
+
+ DPRINT(("fd_seek() to track %d\n",ReqTrack));
+ FDC_WRITE( FDCREG_DATA, ReqTrack << SUDT->stretch);
+ udelay(25);
+ SET_IRQ_HANDLER( fd_seek_done );
+ FDC_WRITE( FDCREG_CMD, FDCCMD_SEEK | SUD.steprate );
+
+ 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 (ATARIHW_PRESENT(FDCSPEED))
+ dma_wd.fdc_speed = SUDT->fdc_speed;
+ if (status & FDCSTAT_RECNF) {
+ printk(KERN_ERR "fd%d: seek error (to track %d)\n",
+ SelectedDrive, ReqTrack );
+ /* we don't know exactly which track we are on now! */
+ SUD.track = -1;
+ fd_error();
+ }
+ else {
+ SUD.track = ReqTrack << SUDT->stretch;
+ NeedSeek = 0;
+ if (IsFormatting)
+ fd_writetrack();
+ else
+ fd_rwsec();
+ }
+}
+
+
+/* This does the actual reading/writing after positioning the head
+ * over the correct track.
+ */
+
+static int MultReadInProgress = 0;
+
+
+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) {
+ if (ATARIHW_PRESENT(EXTD_DMA)) {
+ paddr = virt_to_phys(ReqData);
+ }
+ else {
+ copy_buffer( ReqData, DMABuffer );
+ paddr = PhysDMABuffer;
+ }
+ dma_cache_maintenance( paddr, 512, 1 );
+ rwflag = 0x100;
+ }
+ else {
+ if (read_track)
+ paddr = PhysTrackBuffer;
+ else
+ paddr = ATARIHW_PRESENT(EXTD_DMA) ?
+ virt_to_phys(ReqData) : PhysDMABuffer;
+ rwflag = 0;
+ }
+
+ fd_select_side( ReqSide );
+
+ /* Start sector of this operation */
+ FDC_WRITE( FDCREG_SECTOR, read_track ? 1 : ReqSector );
+ MFPDELAY();
+ /* Cheat for track if stretch != 0 */
+ if (SUDT->stretch) {
+ track = FDC_READ( FDCREG_TRACK);
+ MFPDELAY();
+ FDC_WRITE( FDCREG_TRACK, track >> SUDT->stretch);
+ }
+ udelay(25);
+
+ /* Setup DMA */
+ local_irq_save(flags);
+ dma_wd.dma_lo = (unsigned char)paddr;
+ MFPDELAY();
+ paddr >>= 8;
+ dma_wd.dma_md = (unsigned char)paddr;
+ MFPDELAY();
+ paddr >>= 8;
+ if (ATARIHW_PRESENT(EXTD_DMA))
+ st_dma_ext_dmahi = (unsigned short)paddr;
+ else
+ dma_wd.dma_hi = (unsigned char)paddr;
+ MFPDELAY();
+ local_irq_restore(flags);
+
+ /* Clear FIFO and switch DMA to correct mode */
+ dma_wd.dma_mode_status = 0x90 | rwflag;
+ MFPDELAY();
+ dma_wd.dma_mode_status = 0x90 | (rwflag ^ 0x100);
+ MFPDELAY();
+ dma_wd.dma_mode_status = 0x90 | rwflag;
+ MFPDELAY();
+
+ /* How many sectors for DMA */
+ dma_wd.fdc_acces_seccount = read_track ? SUDT->spt : 1;
+
+ udelay(25);
+
+ /* Start operation */
+ dma_wd.dma_mode_status = FDCSELREG_STP | rwflag;
+ udelay(25);
+ SET_IRQ_HANDLER( fd_rwsec_done );
+ dma_wd.fdc_acces_seccount =
+ (get_head_settle_flag() |
+ (rwflag ? FDCCMD_WRSEC : (FDCCMD_RDSEC | (read_track ? FDCCMDADD_M : 0))));
+
+ old_motoron = MotorOn;
+ MotorOn = 1;
+ NeedSeek = 1;
+ /* wait for interrupt */
+
+ 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-existent sector and need 1 sec to
+ * recognise that it isn't present :-(
+ */
+ MultReadInProgress = 1;
+ mod_timer(&readtrack_timer,
+ /* 1 rot. + 5 rot.s if motor was off */
+ jiffies + HZ/5 + (old_motoron ? 0 : HZ));
+ }
+ start_timeout();
+}
+
+
+static void fd_readtrack_check( unsigned long dummy )
+{
+ unsigned long flags, addr, addr2;
+
+ local_irq_save(flags);
+
+ 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 flow of control
+ * gets here.
+ */
+ local_irq_restore(flags);
+ return;
+ }
+
+ /* get the current DMA address */
+ /* ++ f.a. read twice to avoid being fooled by switcher */
+ addr = 0;
+ do {
+ addr2 = addr;
+ addr = dma_wd.dma_lo & 0xff;
+ MFPDELAY();
+ addr |= (dma_wd.dma_md & 0xff) << 8;
+ MFPDELAY();
+ if (ATARIHW_PRESENT( EXTD_DMA ))
+ addr |= (st_dma_ext_dmahi & 0xffff) << 16;
+ else
+ addr |= (dma_wd.dma_hi & 0xff) << 16;
+ MFPDELAY();
+ } while(addr != addr2);
+
+ if (addr >= PhysTrackBuffer + SUDT->spt*512) {
+ /* already read enough data, force an FDC interrupt to stop
+ * the read operation
+ */
+ SET_IRQ_HANDLER( NULL );
+ MultReadInProgress = 0;
+ local_irq_restore(flags);
+ DPRINT(("fd_readtrack_check(): done\n"));
+ FDC_WRITE( FDCREG_CMD, FDCCMD_FORCI );
+ udelay(25);
+
+ /* No error until now -- the FDC would have interrupted
+ * otherwise!
+ */
+ fd_rwsec_done1(0);
+ }
+ else {
+ /* not yet finished, wait another tenth rotation */
+ local_irq_restore(flags);
+ DPRINT(("fd_readtrack_check(): not yet finished\n"));
+ mod_timer(&readtrack_timer, jiffies + HZ/5/10);
+ }
+}
+
+
+static void fd_rwsec_done( int status )
+{
+ DPRINT(("fd_rwsec_done()\n"));
+
+ if (read_track) {
+ del_timer(&readtrack_timer);
+ if (!MultReadInProgress)
+ return;
+ MultReadInProgress = 0;
+ }
+ fd_rwsec_done1(status);
+}
+
+static void fd_rwsec_done1(int status)
+{
+ unsigned int track;
+
+ stop_timeout();
+
+ /* Correct the track if stretch != 0 */
+ if (SUDT->stretch) {
+ track = FDC_READ( FDCREG_TRACK);
+ MFPDELAY();
+ FDC_WRITE( FDCREG_TRACK, track << SUDT->stretch);
+ }
+
+ if (!UseTrackbuffer) {
+ dma_wd.dma_mode_status = 0x90;
+ MFPDELAY();
+ if (!(dma_wd.dma_mode_status & 0x01)) {
+ printk(KERN_ERR "fd%d: DMA error\n", SelectedDrive );
+ goto err_end;
+ }
+ }
+ MFPDELAY();
+
+ if (ReqCmd == WRITE && (status & FDCSTAT_WPROT)) {
+ printk(KERN_NOTICE "fd%d: is write protected\n", SelectedDrive );
+ goto err_end;
+ }
+ if ((status & FDCSTAT_RECNF) &&
+ /* RECNF is no error after a multiple read when the FDC
+ searched for a non-existent sector! */
+ !(read_track && FDC_READ(FDCREG_SECTOR) > SUDT->spt)) {
+ if (Probing) {
+ if (SUDT > disk_type) {
+ if (SUDT[-1].blocks > ReqBlock) {
+ /* try another disk type */
+ SUDT--;
+ set_capacity(unit[SelectedDrive].disk,
+ SUDT->blocks);
+ } else
+ Probing = 0;
+ }
+ else {
+ if (SUD.flags & FTD_MSG)
+ printk(KERN_INFO "fd%d: Auto-detected floppy type %s\n",
+ SelectedDrive, SUDT->name );
+ Probing=0;
+ }
+ } else {
+/* record not found, but not probing. Maybe stretch wrong ? Restart probing */
+ if (SUD.autoprobe) {
+ SUDT = disk_type + StartDiskType[DriveType];
+ set_capacity(unit[SelectedDrive].disk,
+ SUDT->blocks);
+ Probing = 1;
+ }
+ }
+ if (Probing) {
+ if (ATARIHW_PRESENT(FDCSPEED)) {
+ dma_wd.fdc_speed = SUDT->fdc_speed;
+ MFPDELAY();
+ }
+ setup_req_params( SelectedDrive );
+ BufferDrive = -1;
+ do_fd_action( SelectedDrive );
+ return;
+ }
+
+ printk(KERN_ERR "fd%d: sector %d not found (side %d, track %d)\n",
+ SelectedDrive, FDC_READ (FDCREG_SECTOR), ReqSide, ReqTrack );
+ goto err_end;
+ }
+ if (status & FDCSTAT_CRC) {
+ printk(KERN_ERR "fd%d: CRC error (side %d, track %d, sector %d)\n",
+ SelectedDrive, ReqSide, ReqTrack, FDC_READ (FDCREG_SECTOR) );
+ goto err_end;
+ }
+ if (status & FDCSTAT_LOST) {
+ printk(KERN_ERR "fd%d: lost data (side %d, track %d, sector %d)\n",
+ SelectedDrive, ReqSide, ReqTrack, FDC_READ (FDCREG_SECTOR) );
+ goto err_end;
+ }
+
+ Probing = 0;
+
+ if (ReqCmd == READ) {
+ if (!read_track) {
+ void *addr;
+ addr = ATARIHW_PRESENT( EXTD_DMA ) ? ReqData : DMABuffer;
+ dma_cache_maintenance( virt_to_phys(addr), 512, 0 );
+ if (!ATARIHW_PRESENT( EXTD_DMA ))
+ copy_buffer (addr, ReqData);
+ } else {
+ dma_cache_maintenance( PhysTrackBuffer, MaxSectors[DriveType] * 512, 0 );
+ BufferDrive = SelectedDrive;
+ BufferSide = ReqSide;
+ BufferTrack = ReqTrack;
+ copy_buffer (SECTOR_BUFFER (ReqSector), ReqData);
+ }
+ }
+
+ 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:
+ BufferDrive = -1;
+ fd_error();
+}
+
+
+static void fd_writetrack( void )
+{
+ unsigned long paddr, flags;
+ unsigned int track;
+
+ DPRINT(("fd_writetrack() Tr=%d Si=%d\n", ReqTrack, ReqSide ));
+
+ paddr = PhysTrackBuffer;
+ dma_cache_maintenance( paddr, BUFFER_SIZE, 1 );
+
+ fd_select_side( ReqSide );
+
+ /* Cheat for track if stretch != 0 */
+ if (SUDT->stretch) {
+ track = FDC_READ( FDCREG_TRACK);
+ MFPDELAY();
+ FDC_WRITE(FDCREG_TRACK,track >> SUDT->stretch);
+ }
+ udelay(40);
+
+ /* Setup DMA */
+ local_irq_save(flags);
+ dma_wd.dma_lo = (unsigned char)paddr;
+ MFPDELAY();
+ paddr >>= 8;
+ dma_wd.dma_md = (unsigned char)paddr;
+ MFPDELAY();
+ paddr >>= 8;
+ if (ATARIHW_PRESENT( EXTD_DMA ))
+ st_dma_ext_dmahi = (unsigned short)paddr;
+ else
+ dma_wd.dma_hi = (unsigned char)paddr;
+ MFPDELAY();
+ local_irq_restore(flags);
+
+ /* Clear FIFO and switch DMA to correct mode */
+ dma_wd.dma_mode_status = 0x190;
+ MFPDELAY();
+ dma_wd.dma_mode_status = 0x90;
+ MFPDELAY();
+ dma_wd.dma_mode_status = 0x190;
+ MFPDELAY();
+
+ /* How many sectors for DMA */
+ dma_wd.fdc_acces_seccount = BUFFER_SIZE/512;
+ udelay(40);
+
+ /* Start operation */
+ dma_wd.dma_mode_status = FDCSELREG_STP | 0x100;
+ udelay(40);
+ SET_IRQ_HANDLER( fd_writetrack_done );
+ dma_wd.fdc_acces_seccount = FDCCMD_WRTRA | get_head_settle_flag();
+
+ MotorOn = 1;
+ start_timeout();
+ /* wait for interrupt */
+}
+
+
+static void fd_writetrack_done( int status )
+{
+ DPRINT(("fd_writetrack_done()\n"));
+
+ stop_timeout();
+
+ if (status & FDCSTAT_WPROT) {
+ printk(KERN_NOTICE "fd%d: is write protected\n", SelectedDrive );
+ goto err_end;
+ }
+ if (status & FDCSTAT_LOST) {
+ printk(KERN_ERR "fd%d: lost data (side %d, track %d)\n",
+ SelectedDrive, ReqSide, ReqTrack );
+ goto err_end;
+ }
+
+ wake_up( &format_wait );
+ return;
+
+ err_end:
+ fd_error();
+}
+
+static void fd_times_out( unsigned long dummy )
+{
+ atari_disable_irq( IRQ_MFP_FDC );
+ if (!FloppyIRQHandler) goto end; /* int occurred after timer was fired, but
+ * before we came here... */
+
+ 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 */
+ if (UseTrackbuffer)
+ del_timer( &readtrack_timer );
+ FDC_WRITE( FDCREG_CMD, FDCCMD_FORCI );
+ udelay( 25 );
+
+ printk(KERN_ERR "floppy timeout\n" );
+ fd_error();
+ end:
+ atari_enable_irq( IRQ_MFP_FDC );
+}
+
+
+/* The (noop) seek operation here is needed to make the WP bit in the
+ * FDC 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 )
+{
+ if (!NeedSeek) {
+ finish_fdc_done( 0 );
+ }
+ else {
+ DPRINT(("finish_fdc: dummy seek started\n"));
+ FDC_WRITE (FDCREG_DATA, SUD.track);
+ SET_IRQ_HANDLER( finish_fdc_done );
+ FDC_WRITE (FDCREG_CMD, FDCCMD_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_before(fd_timer.expires, jiffies + 5))
+ /* 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();
+ start_motor_off_timer();
+
+ local_irq_save(flags);
+ stdma_release();
+ fdc_busy = 0;
+ wake_up( &fdc_wait );
+ local_irq_restore(flags);
+
+ DPRINT(("finish_fdc() finished\n"));
+}
+
+/* The detection of disk changes is a dark chapter in Atari history :-(
+ * Because the "Drive ready" signal isn't present in the Atari
+ * hardware, one has to rely on the "Write Protect". This works fine,
+ * as long as no write protected disks are used. TOS solves this
+ * problem by introducing tri-state logic ("maybe changed") and
+ * looking at the serial number in block 0. This isn't possible for
+ * Linux, since the floppy driver can't make assumptions about the
+ * filesystem used on the disk and thus the contents of block 0. I've
+ * chosen the method to always say "The disk was changed" if it is
+ * unsure whether it was. This implies that every open or mount
+ * invalidates the disk buffers if you work with write protected
+ * disks. But at least this is better than working with incorrect data
+ * due to unrecognised disk changes.
+ */
+
+static int check_floppy_change(struct gendisk *disk)
+{
+ struct atari_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 (UD.wpstat) {
+ /* WP is on -> could be changed: to be sure, buffers should be
+ * invalidated...
+ */
+ return 1;
+ }
+
+ return 0;
+}
+
+static int floppy_revalidate(struct gendisk *disk)
+{
+ struct atari_floppy_struct *p = disk->private_data;
+ unsigned int drive = p - unit;
+
+ if (test_bit(drive, &changed_floppies) ||
+ test_bit(drive, &fake_change) ||
+ p->disktype == 0) {
+ if (UD.flags & FTD_MSG)
+ printk(KERN_ERR "floppy: clear format %p!\n", UDT);
+ BufferDrive = -1;
+ clear_bit(drive, &fake_change);
+ clear_bit(drive, &changed_floppies);
+ /* MSch: clearing geometry makes sense only for autoprobe
+ formats, for 'permanent user-defined' parameter:
+ restore default_params[] here if flagged valid! */
+ if (default_params[drive].blocks == 0)
+ UDT = 0;
+ else
+ UDT = &default_params[drive];
+ }
+ 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 / UDT->spt;
+ ReqSector = block - ReqTrack * UDT->spt + 1;
+ ReqSide = ReqTrack & 1;
+ ReqTrack >>= 1;
+ ReqData = ReqBuffer + 512 * ReqCnt;
+
+ if (UseTrackbuffer)
+ read_track = (ReqCmd == READ && CURRENT->errors == 0);
+ else
+ read_track = 0;
+
+ 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 atari_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 ));
+
+ IsFormatting = 0;
+
+repeat:
+
+ if (!CURRENT)
+ goto the_end;
+
+ floppy = CURRENT->rq_disk->private_data;
+ drive = floppy - unit;
+ type = floppy->type;
+
+ if (!UD.connected) {
+ /* drive not connected */
+ printk(KERN_ERR "Unknown Device: fd%d\n", drive );
+ end_request(CURRENT, 0);
+ goto repeat;
+ }
+
+ if (type == 0) {
+ if (!UDT) {
+ Probing = 1;
+ UDT = disk_type + StartDiskType[DriveType];
+ set_capacity(floppy->disk, UDT->blocks);
+ UD.autoprobe = 1;
+ }
+ }
+ else {
+ /* user supplied disk type */
+ if (--type >= NUM_DISK_MINORS) {
+ printk(KERN_WARNING "fd%d: invalid disk format", drive );
+ end_request(CURRENT, 0);
+ goto repeat;
+ }
+ if (minor2disktype[type].drive_types > DriveType) {
+ printk(KERN_WARNING "fd%d: unsupported disk format", drive );
+ end_request(CURRENT, 0);
+ goto repeat;
+ }
+ type = minor2disktype[type].index;
+ UDT = &disk_type[type];
+ set_capacity(floppy->disk, UDT->blocks);
+ UD.autoprobe = 0;
+ }
+
+ if (CURRENT->sector + 1 > UDT->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();
+}
+
+
+void do_fd_request(request_queue_t * q)
+{
+ unsigned long flags;
+
+ DPRINT(("do_fd_request for pid %d\n",current->pid));
+ while( fdc_busy ) sleep_on( &fdc_wait );
+ fdc_busy = 1;
+ stdma_lock(floppy_irq, NULL);
+
+ atari_disable_irq( IRQ_MFP_FDC );
+ local_save_flags(flags); /* The request function is called with ints
+ local_irq_disable(); * disabled... so must save the IPL for later */
+ redo_fd_request();
+ local_irq_restore(flags);
+ atari_enable_irq( IRQ_MFP_FDC );
+}
+
+static int fd_ioctl(struct inode *inode, struct file *filp,
+ unsigned int cmd, unsigned long param)
+{
+ struct gendisk *disk = inode->i_bdev->bd_disk;
+ struct atari_floppy_struct *floppy = disk->private_data;
+ int drive = floppy - unit;
+ int type = floppy->type;
+ struct atari_format_descr fmt_desc;
+ struct atari_disk_type *dtp;
+ struct floppy_struct getprm;
+ int settype;
+ struct floppy_struct setprm;
+
+ switch (cmd) {
+ case FDGETPRM:
+ if (type) {
+ if (--type >= NUM_DISK_MINORS)
+ return -ENODEV;
+ if (minor2disktype[type].drive_types > DriveType)
+ return -ENODEV;
+ type = minor2disktype[type].index;
+ dtp = &disk_type[type];
+ if (UD.flags & FTD_MSG)
+ printk (KERN_ERR "floppy%d: found dtp %p name %s!\n",
+ drive, dtp, dtp->name);
+ }
+ else {
+ if (!UDT)
+ return -ENXIO;
+ else
+ dtp = UDT;
+ }
+ memset((void *)&getprm, 0, sizeof(getprm));
+ getprm.size = dtp->blocks;
+ getprm.sect = dtp->spt;
+ getprm.head = 2;
+ getprm.track = dtp->blocks/dtp->spt/2;
+ getprm.stretch = dtp->stretch;
+ if (copy_to_user((void *)param, &getprm, sizeof(getprm)))
+ return -EFAULT;
+ return 0;
+ }
+ switch (cmd) {
+ case FDSETPRM:
+ case FDDEFPRM:
+ /*
+ * MSch 7/96: simple 'set geometry' case: just set the
+ * 'default' device params (minor == 0).
+ * Currently, the drive geometry is cleared after each
+ * disk change and subsequent revalidate()! simple
+ * implementation of FDDEFPRM: save geometry from a
+ * FDDEFPRM call and restore it in floppy_revalidate() !
+ */
+
+ /* get the parameters from user space */
+ if (floppy->ref != 1 && floppy->ref != -1)
+ return -EBUSY;
+ if (copy_from_user(&setprm, (void *) param, sizeof(setprm)))
+ return -EFAULT;
+ /*
+ * first of all: check for floppy change and revalidate,
+ * or the next access will revalidate - and clear UDT :-(
+ */
+
+ if (check_floppy_change(disk))
+ floppy_revalidate(disk);
+
+ if (UD.flags & FTD_MSG)
+ printk (KERN_INFO "floppy%d: setting size %d spt %d str %d!\n",
+ drive, setprm.size, setprm.sect, setprm.stretch);
+
+ /* what if type > 0 here? Overwrite specified entry ? */
+ if (type) {
+ /* refuse to re-set a predefined type for now */
+ redo_fd_request();
+ return -EINVAL;
+ }
+
+ /*
+ * type == 0: first look for a matching entry in the type list,
+ * and set the UD.disktype field to use the perdefined entry.
+ * TODO: add user-defined format to head of autoprobe list ?
+ * Useful to include the user-type for future autodetection!
+ */
+
+ for (settype = 0; settype < NUM_DISK_MINORS; settype++) {
+ int setidx = 0;
+ if (minor2disktype[settype].drive_types > DriveType) {
+ /* skip this one, invalid for drive ... */
+ continue;
+ }
+ setidx = minor2disktype[settype].index;
+ dtp = &disk_type[setidx];
+
+ /* found matching entry ?? */
+ if ( dtp->blocks == setprm.size
+ && dtp->spt == setprm.sect
+ && dtp->stretch == setprm.stretch ) {
+ if (UD.flags & FTD_MSG)
+ printk (KERN_INFO "floppy%d: setting %s %p!\n",
+ drive, dtp->name, dtp);
+ UDT = dtp;
+ set_capacity(floppy->disk, UDT->blocks);
+
+ if (cmd == FDDEFPRM) {
+ /* save settings as permanent default type */
+ default_params[drive].name = dtp->name;
+ default_params[drive].spt = dtp->spt;
+ default_params[drive].blocks = dtp->blocks;
+ default_params[drive].fdc_speed = dtp->fdc_speed;
+ default_params[drive].stretch = dtp->stretch;
+ }
+
+ return 0;
+ }
+
+ }
+
+ /* no matching disk type found above - setting user_params */
+
+ if (cmd == FDDEFPRM) {
+ /* set permanent type */
+ dtp = &default_params[drive];
+ } else
+ /* set user type (reset by disk change!) */
+ dtp = &user_params[drive];
+
+ dtp->name = "user format";
+ dtp->blocks = setprm.size;
+ dtp->spt = setprm.sect;
+ if (setprm.sect > 14)
+ dtp->fdc_speed = 3;
+ else
+ dtp->fdc_speed = 0;
+ dtp->stretch = setprm.stretch;
+
+ if (UD.flags & FTD_MSG)
+ printk (KERN_INFO "floppy%d: blk %d spt %d str %d!\n",
+ drive, dtp->blocks, dtp->spt, dtp->stretch);
+
+ /* sanity check */
+ if (!dtp || setprm.track != dtp->blocks/dtp->spt/2 ||
+ setprm.head != 2) {
+ redo_fd_request();
+ return -EINVAL;
+ }
+
+ UDT = dtp;
+ set_capacity(floppy->disk, UDT->blocks);
+
+ return 0;
+ case FDMSGON:
+ UD.flags |= FTD_MSG;
+ return 0;
+ case FDMSGOFF:
+ UD.flags &= ~FTD_MSG;
+ return 0;
+ case FDSETEMSGTRESH:
+ return -EINVAL;
+ case FDFMTBEG:
+ return 0;
+ case FDFMTTRK:
+ if (floppy->ref != 1 && floppy->ref != -1)
+ return -EBUSY;
+ if (copy_from_user(&fmt_desc, (void *) param, sizeof(fmt_desc)))
+ return -EFAULT;
+ return do_format(drive, type, &fmt_desc);
+ case FDCLRPRM:
+ UDT = NULL;
+ /* MSch: invalidate default_params */
+ default_params[drive].blocks = 0;
+ set_capacity(floppy->disk, MAX_DISK_SIZE * 2);
+ case FDFMTEND:
+ case FDFLUSH:
+ /* invalidate the buffer track to force a reread */
+ BufferDrive = -1;
+ set_bit(drive, &fake_change);
+ check_disk_change(inode->i_bdev);
+ return 0;
+ default:
+ return -EINVAL;
+ }
+}
+
+
+/* Initialize the 'unit' variable for drive 'drive' */
+
+static void __init fd_probe( int drive )
+{
+ UD.connected = 0;
+ UDT = NULL;
+
+ if (!fd_test_drive_present( drive ))
+ return;
+
+ UD.connected = 1;
+ UD.track = 0;
+ switch( UserSteprate[drive] ) {
+ case 2:
+ UD.steprate = FDCSTEP_2;
+ break;
+ case 3:
+ UD.steprate = FDCSTEP_3;
+ break;
+ case 6:
+ UD.steprate = FDCSTEP_6;
+ break;
+ case 12:
+ UD.steprate = FDCSTEP_12;
+ break;
+ default: /* should be -1 for "not set by user" */
+ if (ATARIHW_PRESENT( FDCSPEED ) || MACH_IS_MEDUSA)
+ UD.steprate = FDCSTEP_3;
+ else
+ UD.steprate = FDCSTEP_6;
+ break;
+ }
+ 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 __init fd_test_drive_present( int drive )
+{
+ unsigned long timeout;
+ unsigned char status;
+ int ok;
+
+ if (drive >= (MACH_IS_FALCON ? 1 : 2)) return( 0 );
+ fd_select_drive( drive );
+
+ /* disable interrupt temporarily */
+ atari_turnoff_irq( IRQ_MFP_FDC );
+ FDC_WRITE (FDCREG_TRACK, 0xff00);
+ FDC_WRITE( FDCREG_CMD, FDCCMD_RESTORE | FDCCMDADD_H | FDCSTEP_6 );
+
+ timeout = jiffies + 2*HZ+HZ/2;
+ while (time_before(jiffies, timeout))
+ if (!(mfp.par_dt_reg & 0x20))
+ break;
+
+ status = FDC_READ( FDCREG_STATUS );
+ ok = (status & FDCSTAT_TR00) != 0;
+
+ /* force interrupt to abort restore operation (FDC would try
+ * about 50 seconds!) */
+ FDC_WRITE( FDCREG_CMD, FDCCMD_FORCI );
+ udelay(500);
+ status = FDC_READ( FDCREG_STATUS );
+ udelay(20);
+
+ if (ok) {
+ /* dummy seek command to make WP bit accessible */
+ FDC_WRITE( FDCREG_DATA, 0 );
+ FDC_WRITE( FDCREG_CMD, FDCCMD_SEEK );
+ while( mfp.par_dt_reg & 0x20 )
+ ;
+ status = FDC_READ( FDCREG_STATUS );
+ }
+
+ atari_turnon_irq( IRQ_MFP_FDC );
+ 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 __init config_types( void )
+{
+ int drive, cnt = 0;
+
+ /* for probing drives, set the FDC speed to 8 MHz */
+ if (ATARIHW_PRESENT(FDCSPEED))
+ dma_wd.fdc_speed = 0;
+
+ printk(KERN_INFO "Probing floppy drive(s):\n");
+ for( drive = 0; drive < FD_MAX_UNITS; drive++ ) {
+ fd_probe( drive );
+ if (UD.connected) {
+ printk(KERN_INFO "fd%d\n", drive);
+ ++cnt;
+ }
+ }
+
+ if (FDC_READ( FDCREG_STATUS ) & FDCSTAT_BUSY) {
+ /* If FDC is still busy from probing, give it another FORCI
+ * command to abort the operation. If this isn't done, the FDC
+ * 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 :-(
+ */
+ FDC_WRITE( FDCREG_CMD, FDCCMD_FORCI );
+ udelay(500);
+ FDC_READ( FDCREG_STATUS );
+ udelay(20);
+ }
+
+ if (cnt > 0) {
+ start_motor_off_timer();
+ if (cnt == 1) fd_select_drive( 0 );
+ start_check_change_timer();
+ }
+}
+
+/*
+ * 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 )
+{
+ struct atari_floppy_struct *p = inode->i_bdev->bd_disk->private_data;
+ int type = iminor(inode) >> 2;
+
+ DPRINT(("fd_open: type=%d\n",type));
+ if (p->ref && p->type != type)
+ return -EBUSY;
+
+ if (p->ref == -1 || (p->ref && filp->f_flags & O_EXCL))
+ return -EBUSY;
+
+ if (filp->f_flags & O_EXCL)
+ p->ref = -1;
+ else
+ p->ref++;
+
+ p->type = 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 (p->wpstat) {
+ if (p->ref < 0)
+ p->ref = 0;
+ else
+ p->ref--;
+ floppy_release(inode, filp);
+ return -EROFS;
+ }
+ }
+ }
+ return 0;
+}
+
+
+static int floppy_release( struct inode * inode, struct file * filp )
+{
+ struct atari_floppy_struct *p = inode->i_bdev->bd_disk->private_data;
+ if (p->ref < 0)
+ p->ref = 0;
+ else if (!p->ref--) {
+ printk(KERN_ERR "floppy_release with fd_ref == 0");
+ p->ref = 0;
+ }
+ return 0;
+}
+
+static struct block_device_operations floppy_fops = {
+ .owner = THIS_MODULE,
+ .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;
+ int type = *part >> 2;
+ if (drive >= FD_MAX_UNITS || type > NUM_DISK_MINORS)
+ return NULL;
+ *part = 0;
+ return get_disk(unit[drive].disk);
+}
+
+static int __init atari_floppy_init (void)
+{
+ int i;
+
+ if (!MACH_IS_ATARI)
+ /* Amiga, Mac, ... don't have Atari-compatible floppy :-) */
+ return -ENXIO;
+
+ if (MACH_IS_HADES)
+ /* Hades doesn't have Atari-compatible floppy */
+ return -ENXIO;
+
+ if (register_blkdev(FLOPPY_MAJOR,"fd"))
+ return -EBUSY;
+
+ for (i = 0; i < FD_MAX_UNITS; i++) {
+ unit[i].disk = alloc_disk(1);
+ if (!unit[i].disk)
+ goto Enomem;
+ }
+
+ if (UseTrackbuffer < 0)
+ /* not set by user -> use default: for now, we turn
+ track buffering off for all Medusas, though it
+ could be used with ones that have a counter
+ card. But the test is too hard :-( */
+ UseTrackbuffer = !MACH_IS_MEDUSA;
+
+ /* initialize variables */
+ SelectedDrive = -1;
+ BufferDrive = -1;
+
+ DMABuffer = atari_stram_alloc(BUFFER_SIZE+512, "ataflop");
+ if (!DMABuffer) {
+ printk(KERN_ERR "atari_floppy_init: cannot get dma buffer\n");
+ goto Enomem;
+ }
+ TrackBuffer = DMABuffer + 512;
+ PhysDMABuffer = virt_to_phys(DMABuffer);
+ PhysTrackBuffer = virt_to_phys(TrackBuffer);
+ BufferDrive = BufferSide = BufferTrack = -1;
+
+ floppy_queue = blk_init_queue(do_fd_request, &ataflop_lock);
+ if (!floppy_queue)
+ goto Enomem;
+
+ for (i = 0; i < FD_MAX_UNITS; i++) {
+ unit[i].track = -1;
+ unit[i].flags = 0;
+ unit[i].disk->major = FLOPPY_MAJOR;
+ unit[i].disk->first_minor = i;
+ sprintf(unit[i].disk->disk_name, "fd%d", i);
+ unit[i].disk->fops = &floppy_fops;
+ unit[i].disk->private_data = &unit[i];
+ unit[i].disk->queue = floppy_queue;
+ set_capacity(unit[i].disk, MAX_DISK_SIZE * 2);
+ add_disk(unit[i].disk);
+ }
+
+ blk_register_region(MKDEV(FLOPPY_MAJOR, 0), 256, THIS_MODULE,
+ floppy_find, NULL, NULL);
+
+ printk(KERN_INFO "Atari floppy driver: max. %cD, %strack buffering\n",
+ DriveType == 0 ? 'D' : DriveType == 1 ? 'H' : 'E',
+ UseTrackbuffer ? "" : "no ");
+ config_types();
+
+ return 0;
+Enomem:
+ while (i--)
+ put_disk(unit[i].disk);
+ if (floppy_queue)
+ blk_cleanup_queue(floppy_queue);
+ unregister_blkdev(FLOPPY_MAJOR, "fd");
+ return -ENOMEM;
+}
+
+
+void __init atari_floppy_setup( char *str, int *ints )
+{
+ int i;
+
+ if (ints[0] < 1) {
+ printk(KERN_ERR "ataflop_setup: no arguments!\n" );
+ return;
+ }
+ else if (ints[0] > 2+FD_MAX_UNITS) {
+ printk(KERN_ERR "ataflop_setup: too many arguments\n" );
+ }
+
+ if (ints[1] < 0 || ints[1] > 2)
+ printk(KERN_ERR "ataflop_setup: bad drive type\n" );
+ else
+ DriveType = ints[1];
+
+ if (ints[0] >= 2)
+ UseTrackbuffer = (ints[2] > 0);
+
+ for( i = 3; i <= ints[0] && i-3 < FD_MAX_UNITS; ++i ) {
+ if (ints[i] != 2 && ints[i] != 3 && ints[i] != 6 && ints[i] != 12)
+ printk(KERN_ERR "ataflop_setup: bad steprate\n" );
+ else
+ UserSteprate[i-3] = ints[i];
+ }
+}
+
+static void atari_floppy_exit(void)
+{
+ int i;
+ blk_unregister_region(MKDEV(FLOPPY_MAJOR, 0), 256);
+ for (i = 0; i < FD_MAX_UNITS; i++) {
+ del_gendisk(unit[i].disk);
+ put_disk(unit[i].disk);
+ }
+ unregister_blkdev(FLOPPY_MAJOR, "fd");
+
+ blk_cleanup_queue(floppy_queue);
+ del_timer_sync(&fd_timer);
+ atari_stram_free( DMABuffer );
+}
+
+module_init(atari_floppy_init)
+module_exit(atari_floppy_exit)
+
+MODULE_LICENSE("GPL");