| /* |
| * 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; |
| static struct request *fd_request; |
| |
| /* 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 ? */ |
| } atari_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 ARRAY_SIZE(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_param(UseTrackbuffer, int, 0); |
| |
| 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_param_array(UserSteprate, int, NULL, 0); |
| |
| /* 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); |
| 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 block_device *bdev, fmode_t mode, 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 block_device *bdev, fmode_t mode); |
| static int floppy_release(struct gendisk *disk, fmode_t mode); |
| |
| /************************* End of Prototypes **************************/ |
| |
| static DEFINE_TIMER(motor_off_timer, fd_motor_off_timer, 0, 0); |
| static DEFINE_TIMER(readtrack_timer, fd_readtrack_check, 0, 0); |
| static DEFINE_TIMER(timeout_timer, fd_times_out, 0, 0); |
| static DEFINE_TIMER(fd_timer, check_change, 0, 0); |
| |
| static void fd_end_request_cur(int err) |
| { |
| if (!__blk_end_request_cur(fd_request, err)) |
| fd_request = NULL; |
| } |
| |
| 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) |
| { |
| 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 (!fd_request) |
| return; |
| |
| fd_request->errors++; |
| if (fd_request->errors >= MAX_ERRORS) { |
| printk(KERN_ERR "fd%d: too many errors.\n", SelectedDrive ); |
| fd_end_request_cur(-EIO); |
| } |
| else if (fd_request->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 = &atari_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 < blk_rq_cur_sectors(fd_request)) { |
| /* read next sector */ |
| setup_req_params( drive ); |
| goto repeat; |
| } |
| else { |
| /* all sectors finished */ |
| fd_end_request_cur(0); |
| 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 > atari_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 = atari_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 < blk_rq_cur_sectors(fd_request)) { |
| /* read next sector */ |
| setup_req_params( SelectedDrive ); |
| do_fd_action( SelectedDrive ); |
| } |
| else { |
| /* all sectors finished */ |
| fd_end_request_cur(0); |
| 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 = NULL; |
| 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 && fd_request->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: fd_request=%p dev=%s fd_request->sector=%ld\n", |
| fd_request, fd_request ? fd_request->rq_disk->disk_name : "", |
| fd_request ? blk_rq_pos(fd_request) : 0 )); |
| |
| IsFormatting = 0; |
| |
| repeat: |
| if (!fd_request) { |
| fd_request = elv_next_request(floppy_queue); |
| if (!fd_request) |
| goto the_end; |
| blkdev_dequeue_request(fd_request); |
| } |
| |
| floppy = fd_request->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 ); |
| fd_end_request_cur(-EIO); |
| goto repeat; |
| } |
| |
| if (type == 0) { |
| if (!UDT) { |
| Probing = 1; |
| UDT = atari_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 ); |
| fd_end_request_cur(-EIO); |
| goto repeat; |
| } |
| if (minor2disktype[type].drive_types > DriveType) { |
| printk(KERN_WARNING "fd%d: unsupported disk format", drive ); |
| fd_end_request_cur(-EIO); |
| goto repeat; |
| } |
| type = minor2disktype[type].index; |
| UDT = &atari_disk_type[type]; |
| set_capacity(floppy->disk, UDT->blocks); |
| UD.autoprobe = 0; |
| } |
| |
| if (blk_rq_pos(fd_request) + 1 > UDT->blocks) { |
| fd_end_request_cur(-EIO); |
| goto repeat; |
| } |
| |
| /* stop deselect timer */ |
| del_timer( &motor_off_timer ); |
| |
| ReqCnt = 0; |
| ReqCmd = rq_data_dir(fd_request); |
| ReqBlock = blk_rq_pos(fd_request); |
| ReqBuffer = fd_request->buffer; |
| setup_req_params( drive ); |
| do_fd_action( drive ); |
| |
| return; |
| |
| the_end: |
| finish_fdc(); |
| } |
| |
| |
| void do_fd_request(struct request_queue * 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 block_device *bdev, fmode_t mode, |
| unsigned int cmd, unsigned long param) |
| { |
| struct gendisk *disk = 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; |
| void __user *argp = (void __user *)param; |
| |
| 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 = &atari_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(argp, &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, argp, 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 = &atari_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, argp, 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(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 (!(st_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( st_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 block_device *bdev, fmode_t mode) |
| { |
| struct atari_floppy_struct *p = bdev->bd_disk->private_data; |
| int type = MINOR(bdev->bd_dev) >> 2; |
| |
| DPRINT(("fd_open: type=%d\n",type)); |
| if (p->ref && p->type != type) |
| return -EBUSY; |
| |
| if (p->ref == -1 || (p->ref && mode & FMODE_EXCL)) |
| return -EBUSY; |
| |
| if (mode & FMODE_EXCL) |
| p->ref = -1; |
| else |
| p->ref++; |
| |
| p->type = type; |
| |
| if (mode & FMODE_NDELAY) |
| return 0; |
| |
| if (mode & (FMODE_READ|FMODE_WRITE)) { |
| check_disk_change(bdev); |
| if (mode & FMODE_WRITE) { |
| if (p->wpstat) { |
| if (p->ref < 0) |
| p->ref = 0; |
| else |
| p->ref--; |
| return -EROFS; |
| } |
| } |
| } |
| return 0; |
| } |
| |
| |
| static int floppy_release(struct gendisk *disk, fmode_t mode) |
| { |
| struct atari_floppy_struct *p = 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, |
| .locked_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 -ENODEV; |
| |
| 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; |
| } |
| |
| #ifndef MODULE |
| static int __init atari_floppy_setup(char *str) |
| { |
| int ints[3 + FD_MAX_UNITS]; |
| int i; |
| |
| if (!MACH_IS_ATARI) |
| return 0; |
| |
| str = get_options(str, 3 + FD_MAX_UNITS, ints); |
| |
| if (ints[0] < 1) { |
| printk(KERN_ERR "ataflop_setup: no arguments!\n" ); |
| return 0; |
| } |
| 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]; |
| } |
| return 1; |
| } |
| |
| __setup("floppy=", atari_floppy_setup); |
| #endif |
| |
| static void __exit 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"); |