| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Linus Torvalds (pre-git) | 6938 | 78.72% | 64 | 42.95% |
| Al Viro | 457 | 5.19% | 19 | 12.75% |
| Christoph Hellwig | 416 | 4.72% | 10 | 6.71% |
| Omar Sandoval | 196 | 2.22% | 3 | 2.01% |
| Michael Schmitz | 141 | 1.60% | 3 | 2.01% |
| Luis R. Rodriguez | 119 | 1.35% | 4 | 2.68% |
| Geert Uytterhoeven | 110 | 1.25% | 9 | 6.04% |
| Tetsuo Handa | 91 | 1.03% | 1 | 0.67% |
| Arnd Bergmann | 85 | 0.96% | 5 | 3.36% |
| Tejun Heo | 66 | 0.75% | 3 | 2.01% |
| Willy Tarreau | 32 | 0.36% | 1 | 0.67% |
| Kees Cook | 32 | 0.36% | 1 | 0.67% |
| Vivek Goyal | 28 | 0.32% | 2 | 1.34% |
| Dan Carpenter | 21 | 0.24% | 3 | 2.01% |
| Ingo Molnar | 16 | 0.18% | 1 | 0.67% |
| Linus Torvalds | 12 | 0.14% | 4 | 2.68% |
| Rusty Russell | 10 | 0.11% | 1 | 0.67% |
| Andrew Morton | 8 | 0.09% | 1 | 0.67% |
| Jens Axboe | 6 | 0.07% | 3 | 2.01% |
| Martin Wilck | 6 | 0.07% | 1 | 0.67% |
| Kay Sievers | 5 | 0.06% | 1 | 0.67% |
| Thomas Gleixner | 5 | 0.06% | 2 | 1.34% |
| Paolo 'Blaisorblade' Giarrusso | 5 | 0.06% | 1 | 0.67% |
| Kai Mäkisara | 2 | 0.02% | 1 | 0.67% |
| Gustavo A. R. Silva | 2 | 0.02% | 1 | 0.67% |
| Tobias Klauser | 1 | 0.01% | 1 | 0.67% |
| Alexey Dobriyan | 1 | 0.01% | 1 | 0.67% |
| Arjan van de Ven | 1 | 0.01% | 1 | 0.67% |
| Jiapeng Chong | 1 | 0.01% | 1 | 0.67% |
| Total | 8813 | 149 |
// SPDX-License-Identifier: GPL-2.0-only /* * 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/blk-mq.h> #include <linux/major.h> #include <linux/mutex.h> #include <linux/completion.h> #include <linux/wait.h> #include <asm/atariints.h> #include <asm/atari_stdma.h> #include <asm/atari_stram.h> #define FD_MAX_UNITS 2 #undef DEBUG static DEFINE_MUTEX(ataflop_mutex); static struct request *fd_request; /* * WD1772 stuff */ /* register codes */ #define FDCSELREG_STP (0x80) /* command/status register */ #define FDCSELREG_TRA (0x82) /* track register */ #define FDCSELREG_SEC (0x84) /* sector register */ #define FDCSELREG_DTA (0x86) /* data register */ /* register names for FDC_READ/WRITE macros */ #define FDCREG_CMD 0 #define FDCREG_STATUS 0 #define FDCREG_TRACK 2 #define FDCREG_SECTOR 4 #define FDCREG_DATA 6 /* command opcodes */ #define FDCCMD_RESTORE (0x00) /* - */ #define FDCCMD_SEEK (0x10) /* | */ #define FDCCMD_STEP (0x20) /* | TYP 1 Commands */ #define FDCCMD_STIN (0x40) /* | */ #define FDCCMD_STOT (0x60) /* - */ #define FDCCMD_RDSEC (0x80) /* - TYP 2 Commands */ #define FDCCMD_WRSEC (0xa0) /* - " */ #define FDCCMD_RDADR (0xc0) /* - */ #define FDCCMD_RDTRA (0xe0) /* | TYP 3 Commands */ #define FDCCMD_WRTRA (0xf0) /* - */ #define FDCCMD_FORCI (0xd0) /* - TYP 4 Command */ /* command modifier bits */ #define FDCCMDADD_SR6 (0x00) /* step rate settings */ #define FDCCMDADD_SR12 (0x01) #define FDCCMDADD_SR2 (0x02) #define FDCCMDADD_SR3 (0x03) #define FDCCMDADD_V (0x04) /* verify */ #define FDCCMDADD_H (0x08) /* wait for spin-up */ #define FDCCMDADD_U (0x10) /* update track register */ #define FDCCMDADD_M (0x10) /* multiple sector access */ #define FDCCMDADD_E (0x04) /* head settling flag */ #define FDCCMDADD_P (0x02) /* precompensation off */ #define FDCCMDADD_A0 (0x01) /* DAM flag */ /* status register bits */ #define FDCSTAT_MOTORON (0x80) /* motor on */ #define FDCSTAT_WPROT (0x40) /* write protected (FDCCMD_WR*) */ #define FDCSTAT_SPINUP (0x20) /* motor speed stable (Type I) */ #define FDCSTAT_DELDAM (0x20) /* sector has deleted DAM (Type II+III) */ #define FDCSTAT_RECNF (0x10) /* record not found */ #define FDCSTAT_CRC (0x08) /* CRC error */ #define FDCSTAT_TR00 (0x04) /* Track 00 flag (Type I) */ #define FDCSTAT_LOST (0x04) /* Lost Data (Type II+III) */ #define FDCSTAT_IDX (0x02) /* Index status (Type I) */ #define FDCSTAT_DRQ (0x02) /* DRQ status (Type II+III) */ #define FDCSTAT_BUSY (0x01) /* FDC is busy */ /* PSG Port A Bit Nr 0 .. Side Sel .. 0 -> Side 1 1 -> Side 2 */ #define DSKSIDE (0x01) #define DSKDRVNONE (0x06) #define DSKDRV0 (0x02) #define DSKDRV1 (0x04) /* step rates */ #define FDCSTEP_6 0x00 #define FDCSTEP_12 0x01 #define FDCSTEP_2 0x02 #define FDCSTEP_3 0x03 struct atari_format_descr { int track; /* to be formatted */ int head; /* "" "" */ int sect_offset; /* offset of first sector */ }; /* 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[NUM_DISK_MINORS]; bool registered[NUM_DISK_MINORS]; int ref; int type; struct blk_mq_tag_set tag_set; int error_count; } 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); static DECLARE_COMPLETION(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(struct timer_list *unused); static void check_change(struct timer_list *unused); 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(struct timer_list *unused); 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(struct timer_list *unused); static void finish_fdc( void ); static void finish_fdc_done( int dummy ); static void setup_req_params( int drive ); static int fd_locked_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 void floppy_release(struct gendisk *disk, fmode_t mode); /************************* End of Prototypes **************************/ static DEFINE_TIMER(motor_off_timer, fd_motor_off_timer); static DEFINE_TIMER(readtrack_timer, fd_readtrack_check); static DEFINE_TIMER(timeout_timer, fd_times_out); static DEFINE_TIMER(fd_timer, check_change); static void fd_end_request_cur(blk_status_t err) { DPRINT(("fd_end_request_cur(), bytes %d of %d\n", blk_rq_cur_bytes(fd_request), blk_rq_bytes(fd_request))); if (!blk_update_request(fd_request, err, blk_rq_cur_bytes(fd_request))) { DPRINT(("calling __blk_mq_end_request()\n")); __blk_mq_end_request(fd_request, err); fd_request = NULL; } else { /* requeue rest of request */ DPRINT(("calling blk_mq_requeue_request()\n")); blk_mq_requeue_request(fd_request, true); 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(struct timer_list *unused) { 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(struct timer_list *unused) { 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; complete(&format_wait); return; } if (!fd_request) return; unit[SelectedDrive].error_count++; if (unit[SelectedDrive].error_count >= MAX_ERRORS) { printk(KERN_ERR "fd%d: too many errors.\n", SelectedDrive ); fd_end_request_cur(BLK_STS_IOERR); finish_fdc(); return; } else if (unit[SelectedDrive].error_count == RECALIBRATE_ERRORS) { printk(KERN_WARNING "fd%d: recalibrating\n", SelectedDrive ); if (SelectedDrive != -1) SUD.track = -1; } /* need to re-run request to recalibrate */ atari_disable_irq( IRQ_MFP_FDC ); setup_req_params( SelectedDrive ); do_fd_action( SelectedDrive ); atari_enable_irq( IRQ_MFP_FDC ); } #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) { struct request_queue *q; unsigned char *p; int sect, nsect; unsigned long flags; int ret; if (type) { type--; if (type >= NUM_DISK_MINORS || minor2disktype[type].drive_types > DriveType) { finish_fdc(); return -EINVAL; } } q = unit[drive].disk[type]->queue; blk_mq_freeze_queue(q); blk_mq_quiesce_queue(q); local_irq_save(flags); stdma_lock(floppy_irq, NULL); atari_turnon_irq( IRQ_MFP_FDC ); /* should be already, just to be sure */ local_irq_restore(flags); if (type) { type = minor2disktype[type].index; UDT = &atari_disk_type[type]; } if (!UDT || desc->track >= UDT->blocks/UDT->spt/2 || desc->head >= 2) { finish_fdc(); ret = -EINVAL; goto out; } 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 ); wait_for_completion(&format_wait); finish_fdc(); ret = FormatError ? -EIO : 0; out: blk_mq_unquiesce_queue(q); blk_mq_unfreeze_queue(q); return ret; } /* 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(BLK_STS_OK); finish_fdc(); 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(struct timer_list *unused) { 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[0], 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[0], 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(BLK_STS_OK); finish_fdc(); } 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; } complete(&format_wait); return; err_end: fd_error(); } static void fd_times_out(struct timer_list *unused) { 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 || !stdma_is_locked_by(floppy_irq)) { 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); if (stdma_is_locked_by(floppy_irq)) stdma_release(); 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 unsigned int floppy_check_events(struct gendisk *disk, unsigned int clearing) { 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 DISK_EVENT_MEDIA_CHANGE; } if (test_bit (drive, &changed_floppies)) { /* surely changed (the WP signal changed at least once) */ return DISK_EVENT_MEDIA_CHANGE; } if (UD.wpstat) { /* WP is on -> could be changed: to be sure, buffers should be * invalidated... */ return DISK_EVENT_MEDIA_CHANGE; } 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) { 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 && unit[drive].error_count == 0); else read_track = 0; DPRINT(("Request params: Si=%d Tr=%d Se=%d Data=%08lx\n",ReqSide, ReqTrack, ReqSector, (unsigned long)ReqData )); } static blk_status_t ataflop_queue_rq(struct blk_mq_hw_ctx *hctx, const struct blk_mq_queue_data *bd) { struct atari_floppy_struct *floppy = bd->rq->q->disk->private_data; int drive = floppy - unit; int type = floppy->type; DPRINT(("Queue request: drive %d type %d sectors %d of %d last %d\n", drive, type, blk_rq_cur_sectors(bd->rq), blk_rq_sectors(bd->rq), bd->last)); spin_lock_irq(&ataflop_lock); if (fd_request) { spin_unlock_irq(&ataflop_lock); return BLK_STS_DEV_RESOURCE; } if (!stdma_try_lock(floppy_irq, NULL)) { spin_unlock_irq(&ataflop_lock); return BLK_STS_RESOURCE; } fd_request = bd->rq; unit[drive].error_count = 0; blk_mq_start_request(fd_request); atari_disable_irq( IRQ_MFP_FDC ); IsFormatting = 0; if (!UD.connected) { /* drive not connected */ printk(KERN_ERR "Unknown Device: fd%d\n", drive ); fd_end_request_cur(BLK_STS_IOERR); stdma_release(); goto out; } if (type == 0) { if (!UDT) { Probing = 1; UDT = atari_disk_type + StartDiskType[DriveType]; set_capacity(bd->rq->q->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(BLK_STS_IOERR); stdma_release(); goto out; } if (minor2disktype[type].drive_types > DriveType) { printk(KERN_WARNING "fd%d: unsupported disk format", drive ); fd_end_request_cur(BLK_STS_IOERR); stdma_release(); goto out; } type = minor2disktype[type].index; UDT = &atari_disk_type[type]; set_capacity(bd->rq->q->disk, UDT->blocks); UD.autoprobe = 0; } /* stop deselect timer */ del_timer( &motor_off_timer ); ReqCnt = 0; ReqCmd = rq_data_dir(fd_request); ReqBlock = blk_rq_pos(fd_request); ReqBuffer = bio_data(fd_request->bio); setup_req_params( drive ); do_fd_action( drive ); atari_enable_irq( IRQ_MFP_FDC ); out: spin_unlock_irq(&ataflop_lock); return BLK_STS_OK; } static int fd_locked_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 (floppy_check_events(disk, 0)) 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 */ finish_fdc(); 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(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 (setprm.track != dtp->blocks/dtp->spt/2 || setprm.head != 2) { finish_fdc(); return -EINVAL; } UDT = dtp; set_capacity(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(disk, MAX_DISK_SIZE * 2); fallthrough; case FDFMTEND: case FDFLUSH: /* invalidate the buffer track to force a reread */ BufferDrive = -1; set_bit(drive, &fake_change); if (bdev_check_media_change(bdev)) floppy_revalidate(bdev->bd_disk); return 0; default: return -EINVAL; } } static int fd_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd, unsigned long arg) { int ret; mutex_lock(&ataflop_mutex); ret = fd_locked_ioctl(bdev, mode, cmd, arg); mutex_unlock(&ataflop_mutex); return ret; } /* 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)) { if (bdev_check_media_change(bdev)) floppy_revalidate(bdev->bd_disk); if (mode & FMODE_WRITE) { if (p->wpstat) { if (p->ref < 0) p->ref = 0; else p->ref--; return -EROFS; } } } return 0; } static int floppy_unlocked_open(struct block_device *bdev, fmode_t mode) { int ret; mutex_lock(&ataflop_mutex); ret = floppy_open(bdev, mode); mutex_unlock(&ataflop_mutex); return ret; } static void floppy_release(struct gendisk *disk, fmode_t mode) { struct atari_floppy_struct *p = disk->private_data; mutex_lock(&ataflop_mutex); if (p->ref < 0) p->ref = 0; else if (!p->ref--) { printk(KERN_ERR "floppy_release with fd_ref == 0"); p->ref = 0; } mutex_unlock(&ataflop_mutex); } static const struct block_device_operations floppy_fops = { .owner = THIS_MODULE, .open = floppy_unlocked_open, .release = floppy_release, .ioctl = fd_ioctl, .check_events = floppy_check_events, }; static const struct blk_mq_ops ataflop_mq_ops = { .queue_rq = ataflop_queue_rq, }; static int ataflop_alloc_disk(unsigned int drive, unsigned int type) { struct gendisk *disk; disk = blk_mq_alloc_disk(&unit[drive].tag_set, NULL); if (IS_ERR(disk)) return PTR_ERR(disk); disk->major = FLOPPY_MAJOR; disk->first_minor = drive + (type << 2); disk->minors = 1; sprintf(disk->disk_name, "fd%d", drive); disk->fops = &floppy_fops; disk->flags |= GENHD_FL_NO_PART; disk->events = DISK_EVENT_MEDIA_CHANGE; disk->private_data = &unit[drive]; set_capacity(disk, MAX_DISK_SIZE * 2); unit[drive].disk[type] = disk; return 0; } static void ataflop_probe(dev_t dev) { int drive = MINOR(dev) & 3; int type = MINOR(dev) >> 2; if (type) type--; if (drive >= FD_MAX_UNITS || type >= NUM_DISK_MINORS) return; if (unit[drive].disk[type]) return; if (ataflop_alloc_disk(drive, type)) return; if (add_disk(unit[drive].disk[type])) goto cleanup_disk; unit[drive].registered[type] = true; return; cleanup_disk: put_disk(unit[drive].disk[type]); unit[drive].disk[type] = NULL; } static void atari_floppy_cleanup(void) { int i; int type; for (i = 0; i < FD_MAX_UNITS; i++) { for (type = 0; type < NUM_DISK_MINORS; type++) { if (!unit[i].disk[type]) continue; del_gendisk(unit[i].disk[type]); put_disk(unit[i].disk[type]); } blk_mq_free_tag_set(&unit[i].tag_set); } del_timer_sync(&fd_timer); atari_stram_free(DMABuffer); } static void atari_cleanup_floppy_disk(struct atari_floppy_struct *fs) { int type; for (type = 0; type < NUM_DISK_MINORS; type++) { if (!fs->disk[type]) continue; if (fs->registered[type]) del_gendisk(fs->disk[type]); put_disk(fs->disk[type]); } blk_mq_free_tag_set(&fs->tag_set); } static int __init atari_floppy_init (void) { int i; int ret; if (!MACH_IS_ATARI) /* Amiga, Mac, ... don't have Atari-compatible floppy :-) */ return -ENODEV; for (i = 0; i < FD_MAX_UNITS; i++) { memset(&unit[i].tag_set, 0, sizeof(unit[i].tag_set)); unit[i].tag_set.ops = &ataflop_mq_ops; unit[i].tag_set.nr_hw_queues = 1; unit[i].tag_set.nr_maps = 1; unit[i].tag_set.queue_depth = 2; unit[i].tag_set.numa_node = NUMA_NO_NODE; unit[i].tag_set.flags = BLK_MQ_F_SHOULD_MERGE; ret = blk_mq_alloc_tag_set(&unit[i].tag_set); if (ret) goto err; ret = ataflop_alloc_disk(i, 0); if (ret) { blk_mq_free_tag_set(&unit[i].tag_set); goto err; } } 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"); ret = -ENOMEM; goto err; } TrackBuffer = DMABuffer + 512; PhysDMABuffer = atari_stram_to_phys(DMABuffer); PhysTrackBuffer = virt_to_phys(TrackBuffer); BufferDrive = BufferSide = BufferTrack = -1; for (i = 0; i < FD_MAX_UNITS; i++) { unit[i].track = -1; unit[i].flags = 0; ret = add_disk(unit[i].disk[0]); if (ret) goto err_out_dma; unit[i].registered[0] = true; } printk(KERN_INFO "Atari floppy driver: max. %cD, %strack buffering\n", DriveType == 0 ? 'D' : DriveType == 1 ? 'H' : 'E', UseTrackbuffer ? "" : "no "); config_types(); ret = __register_blkdev(FLOPPY_MAJOR, "fd", ataflop_probe); if (ret) { printk(KERN_ERR "atari_floppy_init: cannot register block device\n"); atari_floppy_cleanup(); } return ret; err_out_dma: atari_stram_free(DMABuffer); err: while (--i >= 0) atari_cleanup_floppy_disk(&unit[i]); return ret; } #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) { unregister_blkdev(FLOPPY_MAJOR, "fd"); atari_floppy_cleanup(); } module_init(atari_floppy_init) module_exit(atari_floppy_exit) MODULE_LICENSE("GPL");
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