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2152 lines
55 KiB
2152 lines
55 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* drivers/block/ataflop.c |
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* |
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* Copyright (C) 1993 Greg Harp |
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* Atari Support by Bjoern Brauel, Roman Hodek |
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* |
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* Big cleanup Sep 11..14 1994 Roman Hodek: |
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* - Driver now works interrupt driven |
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* - Support for two drives; should work, but I cannot test that :-( |
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* - Reading is done in whole tracks and buffered to speed up things |
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* - Disk change detection and drive deselecting after motor-off |
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* similar to TOS |
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* - Autodetection of disk format (DD/HD); untested yet, because I |
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* don't have an HD drive :-( |
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* |
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* Fixes Nov 13 1994 Martin Schaller: |
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* - Autodetection works now |
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* - Support for 5 1/4'' disks |
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* - Removed drive type (unknown on atari) |
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* - Do seeks with 8 Mhz |
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* |
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* Changes by Andreas Schwab: |
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* - After errors in multiple read mode try again reading single sectors |
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* (Feb 1995): |
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* - Clean up error handling |
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* - Set blk_size for proper size checking |
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* - Initialize track register when testing presence of floppy |
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* - Implement some ioctl's |
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* |
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* Changes by Torsten Lang: |
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* - When probing the floppies we should add the FDCCMDADD_H flag since |
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* the FDC will otherwise wait forever when no disk is inserted... |
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* |
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* ++ Freddi Aschwanden (fa) 20.9.95 fixes for medusa: |
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* - MFPDELAY() after each FDC access -> atari |
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* - more/other disk formats |
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* - DMA to the block buffer directly if we have a 32bit DMA |
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* - for medusa, the step rate is always 3ms |
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* - on medusa, use only cache_push() |
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* Roman: |
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* - Make disk format numbering independent from minors |
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* - Let user set max. supported drive type (speeds up format |
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* detection, saves buffer space) |
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* |
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* Roman 10/15/95: |
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* - implement some more ioctls |
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* - disk formatting |
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* |
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* Andreas 95/12/12: |
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* - increase gap size at start of track for HD/ED disks |
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* |
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* Michael (MSch) 11/07/96: |
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* - implemented FDSETPRM and FDDEFPRM ioctl |
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* |
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* Andreas (97/03/19): |
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* - implemented missing BLK* ioctls |
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* |
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* Things left to do: |
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* - Formatting |
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* - Maybe a better strategy for disk change detection (does anyone |
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* know one?) |
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*/ |
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|
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#include <linux/module.h> |
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|
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#include <linux/fd.h> |
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#include <linux/delay.h> |
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#include <linux/init.h> |
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#include <linux/blk-mq.h> |
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#include <linux/mutex.h> |
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#include <linux/completion.h> |
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#include <linux/wait.h> |
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|
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#include <asm/atariints.h> |
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#include <asm/atari_stdma.h> |
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#include <asm/atari_stram.h> |
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#define FD_MAX_UNITS 2 |
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#undef DEBUG |
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static DEFINE_MUTEX(ataflop_mutex); |
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static struct request *fd_request; |
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|
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/* |
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* WD1772 stuff |
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*/ |
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|
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/* register codes */ |
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|
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#define FDCSELREG_STP (0x80) /* command/status register */ |
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#define FDCSELREG_TRA (0x82) /* track register */ |
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#define FDCSELREG_SEC (0x84) /* sector register */ |
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#define FDCSELREG_DTA (0x86) /* data register */ |
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|
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/* register names for FDC_READ/WRITE macros */ |
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#define FDCREG_CMD 0 |
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#define FDCREG_STATUS 0 |
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#define FDCREG_TRACK 2 |
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#define FDCREG_SECTOR 4 |
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#define FDCREG_DATA 6 |
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|
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/* command opcodes */ |
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#define FDCCMD_RESTORE (0x00) /* - */ |
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#define FDCCMD_SEEK (0x10) /* | */ |
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#define FDCCMD_STEP (0x20) /* | TYP 1 Commands */ |
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#define FDCCMD_STIN (0x40) /* | */ |
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#define FDCCMD_STOT (0x60) /* - */ |
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#define FDCCMD_RDSEC (0x80) /* - TYP 2 Commands */ |
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#define FDCCMD_WRSEC (0xa0) /* - " */ |
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#define FDCCMD_RDADR (0xc0) /* - */ |
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#define FDCCMD_RDTRA (0xe0) /* | TYP 3 Commands */ |
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#define FDCCMD_WRTRA (0xf0) /* - */ |
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#define FDCCMD_FORCI (0xd0) /* - TYP 4 Command */ |
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|
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/* command modifier bits */ |
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|
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#define FDCCMDADD_SR6 (0x00) /* step rate settings */ |
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#define FDCCMDADD_SR12 (0x01) |
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#define FDCCMDADD_SR2 (0x02) |
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#define FDCCMDADD_SR3 (0x03) |
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#define FDCCMDADD_V (0x04) /* verify */ |
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#define FDCCMDADD_H (0x08) /* wait for spin-up */ |
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#define FDCCMDADD_U (0x10) /* update track register */ |
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#define FDCCMDADD_M (0x10) /* multiple sector access */ |
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#define FDCCMDADD_E (0x04) /* head settling flag */ |
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#define FDCCMDADD_P (0x02) /* precompensation off */ |
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#define FDCCMDADD_A0 (0x01) /* DAM flag */ |
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|
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/* status register bits */ |
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|
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#define FDCSTAT_MOTORON (0x80) /* motor on */ |
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#define FDCSTAT_WPROT (0x40) /* write protected (FDCCMD_WR*) */ |
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#define FDCSTAT_SPINUP (0x20) /* motor speed stable (Type I) */ |
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#define FDCSTAT_DELDAM (0x20) /* sector has deleted DAM (Type II+III) */ |
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#define FDCSTAT_RECNF (0x10) /* record not found */ |
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#define FDCSTAT_CRC (0x08) /* CRC error */ |
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#define FDCSTAT_TR00 (0x04) /* Track 00 flag (Type I) */ |
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#define FDCSTAT_LOST (0x04) /* Lost Data (Type II+III) */ |
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#define FDCSTAT_IDX (0x02) /* Index status (Type I) */ |
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#define FDCSTAT_DRQ (0x02) /* DRQ status (Type II+III) */ |
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#define FDCSTAT_BUSY (0x01) /* FDC is busy */ |
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/* PSG Port A Bit Nr 0 .. Side Sel .. 0 -> Side 1 1 -> Side 2 */ |
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#define DSKSIDE (0x01) |
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#define DSKDRVNONE (0x06) |
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#define DSKDRV0 (0x02) |
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#define DSKDRV1 (0x04) |
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|
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/* step rates */ |
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#define FDCSTEP_6 0x00 |
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#define FDCSTEP_12 0x01 |
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#define FDCSTEP_2 0x02 |
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#define FDCSTEP_3 0x03 |
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struct atari_format_descr { |
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int track; /* to be formatted */ |
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int head; /* "" "" */ |
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int sect_offset; /* offset of first sector */ |
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}; |
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/* Disk types: DD, HD, ED */ |
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static struct atari_disk_type { |
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const char *name; |
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unsigned spt; /* sectors per track */ |
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unsigned blocks; /* total number of blocks */ |
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unsigned fdc_speed; /* fdc_speed setting */ |
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unsigned stretch; /* track doubling ? */ |
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} atari_disk_type[] = { |
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{ "d360", 9, 720, 0, 0}, /* 0: 360kB diskette */ |
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{ "D360", 9, 720, 0, 1}, /* 1: 360kb in 720k or 1.2MB drive */ |
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{ "D720", 9,1440, 0, 0}, /* 2: 720kb in 720k or 1.2MB drive */ |
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{ "D820", 10,1640, 0, 0}, /* 3: DD disk with 82 tracks/10 sectors */ |
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/* formats above are probed for type DD */ |
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#define MAX_TYPE_DD 3 |
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{ "h1200",15,2400, 3, 0}, /* 4: 1.2MB diskette */ |
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{ "H1440",18,2880, 3, 0}, /* 5: 1.4 MB diskette (HD) */ |
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{ "H1640",20,3280, 3, 0}, /* 6: 1.64MB diskette (fat HD) 82 tr 20 sec */ |
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/* formats above are probed for types DD and HD */ |
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#define MAX_TYPE_HD 6 |
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{ "E2880",36,5760, 3, 0}, /* 7: 2.8 MB diskette (ED) */ |
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{ "E3280",40,6560, 3, 0}, /* 8: 3.2 MB diskette (fat ED) 82 tr 40 sec */ |
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/* formats above are probed for types DD, HD and ED */ |
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#define MAX_TYPE_ED 8 |
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/* types below are never autoprobed */ |
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{ "H1680",21,3360, 3, 0}, /* 9: 1.68MB diskette (fat HD) 80 tr 21 sec */ |
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{ "h410",10,820, 0, 1}, /* 10: 410k diskette 41 tr 10 sec, stretch */ |
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{ "h1476",18,2952, 3, 0}, /* 11: 1.48MB diskette 82 tr 18 sec */ |
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{ "H1722",21,3444, 3, 0}, /* 12: 1.72MB diskette 82 tr 21 sec */ |
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{ "h420",10,840, 0, 1}, /* 13: 420k diskette 42 tr 10 sec, stretch */ |
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{ "H830",10,1660, 0, 0}, /* 14: 820k diskette 83 tr 10 sec */ |
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{ "h1494",18,2952, 3, 0}, /* 15: 1.49MB diskette 83 tr 18 sec */ |
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{ "H1743",21,3486, 3, 0}, /* 16: 1.74MB diskette 83 tr 21 sec */ |
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{ "h880",11,1760, 0, 0}, /* 17: 880k diskette 80 tr 11 sec */ |
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{ "D1040",13,2080, 0, 0}, /* 18: 1.04MB diskette 80 tr 13 sec */ |
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{ "D1120",14,2240, 0, 0}, /* 19: 1.12MB diskette 80 tr 14 sec */ |
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{ "h1600",20,3200, 3, 0}, /* 20: 1.60MB diskette 80 tr 20 sec */ |
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{ "H1760",22,3520, 3, 0}, /* 21: 1.76MB diskette 80 tr 22 sec */ |
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{ "H1920",24,3840, 3, 0}, /* 22: 1.92MB diskette 80 tr 24 sec */ |
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{ "E3200",40,6400, 3, 0}, /* 23: 3.2MB diskette 80 tr 40 sec */ |
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{ "E3520",44,7040, 3, 0}, /* 24: 3.52MB diskette 80 tr 44 sec */ |
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{ "E3840",48,7680, 3, 0}, /* 25: 3.84MB diskette 80 tr 48 sec */ |
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{ "H1840",23,3680, 3, 0}, /* 26: 1.84MB diskette 80 tr 23 sec */ |
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{ "D800",10,1600, 0, 0}, /* 27: 800k diskette 80 tr 10 sec */ |
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}; |
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static int StartDiskType[] = { |
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MAX_TYPE_DD, |
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MAX_TYPE_HD, |
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MAX_TYPE_ED |
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}; |
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#define TYPE_DD 0 |
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#define TYPE_HD 1 |
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#define TYPE_ED 2 |
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static int DriveType = TYPE_HD; |
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static DEFINE_SPINLOCK(ataflop_lock); |
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/* Array for translating minors into disk formats */ |
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static struct { |
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int index; |
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unsigned drive_types; |
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} minor2disktype[] = { |
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{ 0, TYPE_DD }, /* 1: d360 */ |
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{ 4, TYPE_HD }, /* 2: h1200 */ |
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{ 1, TYPE_DD }, /* 3: D360 */ |
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{ 2, TYPE_DD }, /* 4: D720 */ |
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{ 1, TYPE_DD }, /* 5: h360 = D360 */ |
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{ 2, TYPE_DD }, /* 6: h720 = D720 */ |
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{ 5, TYPE_HD }, /* 7: H1440 */ |
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{ 7, TYPE_ED }, /* 8: E2880 */ |
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/* some PC formats :-) */ |
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{ 8, TYPE_ED }, /* 9: E3280 <- was "CompaQ" == E2880 for PC */ |
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{ 5, TYPE_HD }, /* 10: h1440 = H1440 */ |
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{ 9, TYPE_HD }, /* 11: H1680 */ |
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{ 10, TYPE_DD }, /* 12: h410 */ |
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{ 3, TYPE_DD }, /* 13: H820 <- == D820, 82x10 */ |
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{ 11, TYPE_HD }, /* 14: h1476 */ |
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{ 12, TYPE_HD }, /* 15: H1722 */ |
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{ 13, TYPE_DD }, /* 16: h420 */ |
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{ 14, TYPE_DD }, /* 17: H830 */ |
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{ 15, TYPE_HD }, /* 18: h1494 */ |
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{ 16, TYPE_HD }, /* 19: H1743 */ |
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{ 17, TYPE_DD }, /* 20: h880 */ |
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{ 18, TYPE_DD }, /* 21: D1040 */ |
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{ 19, TYPE_DD }, /* 22: D1120 */ |
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{ 20, TYPE_HD }, /* 23: h1600 */ |
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{ 21, TYPE_HD }, /* 24: H1760 */ |
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{ 22, TYPE_HD }, /* 25: H1920 */ |
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{ 23, TYPE_ED }, /* 26: E3200 */ |
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{ 24, TYPE_ED }, /* 27: E3520 */ |
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{ 25, TYPE_ED }, /* 28: E3840 */ |
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{ 26, TYPE_HD }, /* 29: H1840 */ |
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{ 27, TYPE_DD }, /* 30: D800 */ |
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{ 6, TYPE_HD }, /* 31: H1640 <- was H1600 == h1600 for PC */ |
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}; |
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#define NUM_DISK_MINORS ARRAY_SIZE(minor2disktype) |
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/* |
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* Maximum disk size (in kilobytes). This default is used whenever the |
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* current disk size is unknown. |
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*/ |
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#define MAX_DISK_SIZE 3280 |
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/* |
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* MSch: User-provided type information. 'drive' points to |
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* the respective entry of this array. Set by FDSETPRM ioctls. |
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*/ |
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static struct atari_disk_type user_params[FD_MAX_UNITS]; |
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/* |
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* User-provided permanent type information. 'drive' points to |
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* the respective entry of this array. Set by FDDEFPRM ioctls, |
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* restored upon disk change by floppy_revalidate() if valid (as seen by |
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* default_params[].blocks > 0 - a bit in unit[].flags might be used for this?) |
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*/ |
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static struct atari_disk_type default_params[FD_MAX_UNITS]; |
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/* current info on each unit */ |
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static struct atari_floppy_struct { |
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int connected; /* !=0 : drive is connected */ |
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int autoprobe; /* !=0 : do autoprobe */ |
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struct atari_disk_type *disktype; /* current type of disk */ |
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int track; /* current head position or -1 if |
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unknown */ |
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unsigned int steprate; /* steprate setting */ |
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unsigned int wpstat; /* current state of WP signal (for |
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disk change detection) */ |
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int flags; /* flags */ |
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struct gendisk *disk[NUM_DISK_MINORS]; |
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int ref; |
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int type; |
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struct blk_mq_tag_set tag_set; |
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} unit[FD_MAX_UNITS]; |
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#define UD unit[drive] |
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#define UDT unit[drive].disktype |
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#define SUD unit[SelectedDrive] |
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#define SUDT unit[SelectedDrive].disktype |
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#define FDC_READ(reg) ({ \ |
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/* unsigned long __flags; */ \ |
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unsigned short __val; \ |
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/* local_irq_save(__flags); */ \ |
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dma_wd.dma_mode_status = 0x80 | (reg); \ |
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udelay(25); \ |
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__val = dma_wd.fdc_acces_seccount; \ |
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MFPDELAY(); \ |
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/* local_irq_restore(__flags); */ \ |
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__val & 0xff; \ |
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}) |
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#define FDC_WRITE(reg,val) \ |
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do { \ |
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/* unsigned long __flags; */ \ |
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/* local_irq_save(__flags); */ \ |
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dma_wd.dma_mode_status = 0x80 | (reg); \ |
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udelay(25); \ |
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dma_wd.fdc_acces_seccount = (val); \ |
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MFPDELAY(); \ |
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/* local_irq_restore(__flags); */ \ |
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} while(0) |
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/* Buffering variables: |
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* First, there is a DMA buffer in ST-RAM that is used for floppy DMA |
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* operations. Second, a track buffer is used to cache a whole track |
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* of the disk to save read operations. These are two separate buffers |
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* because that allows write operations without clearing the track buffer. |
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*/ |
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static int MaxSectors[] = { |
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11, 22, 44 |
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}; |
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static int BufferSize[] = { |
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15*512, 30*512, 60*512 |
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}; |
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#define BUFFER_SIZE (BufferSize[DriveType]) |
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unsigned char *DMABuffer; /* buffer for writes */ |
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static unsigned long PhysDMABuffer; /* physical address */ |
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static int UseTrackbuffer = -1; /* Do track buffering? */ |
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module_param(UseTrackbuffer, int, 0); |
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unsigned char *TrackBuffer; /* buffer for reads */ |
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static unsigned long PhysTrackBuffer; /* physical address */ |
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static int BufferDrive, BufferSide, BufferTrack; |
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static int read_track; /* non-zero if we are reading whole tracks */ |
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#define SECTOR_BUFFER(sec) (TrackBuffer + ((sec)-1)*512) |
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#define IS_BUFFERED(drive,side,track) \ |
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(BufferDrive == (drive) && BufferSide == (side) && BufferTrack == (track)) |
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/* |
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* These are global variables, as that's the easiest way to give |
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* information to interrupts. They are the data used for the current |
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* request. |
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*/ |
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static int SelectedDrive = 0; |
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static int ReqCmd, ReqBlock; |
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static int ReqSide, ReqTrack, ReqSector, ReqCnt; |
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static int HeadSettleFlag = 0; |
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static unsigned char *ReqData, *ReqBuffer; |
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static int MotorOn = 0, MotorOffTrys; |
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static int IsFormatting = 0, FormatError; |
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static int UserSteprate[FD_MAX_UNITS] = { -1, -1 }; |
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module_param_array(UserSteprate, int, NULL, 0); |
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static DECLARE_COMPLETION(format_wait); |
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static unsigned long changed_floppies = 0xff, fake_change = 0; |
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#define CHECK_CHANGE_DELAY HZ/2 |
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#define FD_MOTOR_OFF_DELAY (3*HZ) |
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#define FD_MOTOR_OFF_MAXTRY (10*20) |
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#define FLOPPY_TIMEOUT (6*HZ) |
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#define RECALIBRATE_ERRORS 4 /* After this many errors the drive |
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* will be recalibrated. */ |
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#define MAX_ERRORS 8 /* After this many errors the driver |
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* will give up. */ |
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/* |
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* The driver is trying to determine the correct media format |
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* while Probing is set. fd_rwsec_done() clears it after a |
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* successful access. |
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*/ |
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static int Probing = 0; |
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|
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/* This flag is set when a dummy seek is necessary to make the WP |
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* status bit accessible. |
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*/ |
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static int NeedSeek = 0; |
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#ifdef DEBUG |
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#define DPRINT(a) printk a |
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#else |
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#define DPRINT(a) |
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#endif |
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|
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/***************************** Prototypes *****************************/ |
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static void fd_select_side( int side ); |
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static void fd_select_drive( int drive ); |
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static void fd_deselect( void ); |
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static void fd_motor_off_timer(struct timer_list *unused); |
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static void check_change(struct timer_list *unused); |
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static irqreturn_t floppy_irq (int irq, void *dummy); |
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static void fd_error( void ); |
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static int do_format(int drive, int type, struct atari_format_descr *desc); |
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static void do_fd_action( int drive ); |
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static void fd_calibrate( void ); |
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static void fd_calibrate_done( int status ); |
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static void fd_seek( void ); |
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static void fd_seek_done( int status ); |
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static void fd_rwsec( void ); |
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static void fd_readtrack_check(struct timer_list *unused); |
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static void fd_rwsec_done( int status ); |
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static void fd_rwsec_done1(int status); |
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static void fd_writetrack( void ); |
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static void fd_writetrack_done( int status ); |
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static void fd_times_out(struct timer_list *unused); |
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static void finish_fdc( void ); |
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static void finish_fdc_done( int dummy ); |
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static void setup_req_params( int drive ); |
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static int fd_locked_ioctl(struct block_device *bdev, fmode_t mode, unsigned int |
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cmd, unsigned long param); |
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static void fd_probe( int drive ); |
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static int fd_test_drive_present( int drive ); |
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static void config_types( void ); |
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static int floppy_open(struct block_device *bdev, fmode_t mode); |
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static void floppy_release(struct gendisk *disk, fmode_t mode); |
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|
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/************************* End of Prototypes **************************/ |
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static DEFINE_TIMER(motor_off_timer, fd_motor_off_timer); |
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static DEFINE_TIMER(readtrack_timer, fd_readtrack_check); |
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static DEFINE_TIMER(timeout_timer, fd_times_out); |
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static DEFINE_TIMER(fd_timer, check_change); |
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static void fd_end_request_cur(blk_status_t err) |
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{ |
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if (!blk_update_request(fd_request, err, |
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blk_rq_cur_bytes(fd_request))) { |
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__blk_mq_end_request(fd_request, err); |
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fd_request = NULL; |
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} |
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} |
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static inline void start_motor_off_timer(void) |
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{ |
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mod_timer(&motor_off_timer, jiffies + FD_MOTOR_OFF_DELAY); |
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MotorOffTrys = 0; |
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} |
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|
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static inline void start_check_change_timer( void ) |
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{ |
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mod_timer(&fd_timer, jiffies + CHECK_CHANGE_DELAY); |
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} |
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|
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static inline void start_timeout(void) |
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{ |
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mod_timer(&timeout_timer, jiffies + FLOPPY_TIMEOUT); |
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} |
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|
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static inline void stop_timeout(void) |
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{ |
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del_timer(&timeout_timer); |
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} |
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|
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/* Select the side to use. */ |
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|
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static void fd_select_side( int side ) |
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{ |
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unsigned long flags; |
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|
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/* protect against various other ints mucking around with the PSG */ |
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local_irq_save(flags); |
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|
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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; |
|
|
|
fd_request->error_count++; |
|
if (fd_request->error_count >= MAX_ERRORS) { |
|
printk(KERN_ERR "fd%d: too many errors.\n", SelectedDrive ); |
|
fd_end_request_cur(BLK_STS_IOERR); |
|
} |
|
else if (fd_request->error_count == RECALIBRATE_ERRORS) { |
|
printk(KERN_WARNING "fd%d: recalibrating\n", SelectedDrive ); |
|
if (SelectedDrive != -1) |
|
SUD.track = -1; |
|
} |
|
} |
|
|
|
|
|
|
|
#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) |
|
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) { |
|
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); |
|
|
|
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); |
|
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); |
|
} |
|
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) { |
|
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(); |
|
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 == 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->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 void ataflop_commit_rqs(struct blk_mq_hw_ctx *hctx) |
|
{ |
|
spin_lock_irq(&ataflop_lock); |
|
atari_disable_irq(IRQ_MFP_FDC); |
|
finish_fdc(); |
|
atari_enable_irq(IRQ_MFP_FDC); |
|
spin_unlock_irq(&ataflop_lock); |
|
} |
|
|
|
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->rq_disk->private_data; |
|
int drive = floppy - unit; |
|
int type = floppy->type; |
|
|
|
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; |
|
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); |
|
goto out; |
|
} |
|
|
|
if (type == 0) { |
|
if (!UDT) { |
|
Probing = 1; |
|
UDT = atari_disk_type + StartDiskType[DriveType]; |
|
set_capacity(bd->rq->rq_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); |
|
goto out; |
|
} |
|
if (minor2disktype[type].drive_types > DriveType) { |
|
printk(KERN_WARNING "fd%d: unsupported disk format", drive ); |
|
fd_end_request_cur(BLK_STS_IOERR); |
|
goto out; |
|
} |
|
type = minor2disktype[type].index; |
|
UDT = &atari_disk_type[type]; |
|
set_capacity(bd->rq->rq_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 ); |
|
|
|
if (bd->last) |
|
finish_fdc(); |
|
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 */ |
|
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) |
|
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, |
|
.commit_rqs = ataflop_commit_rqs, |
|
}; |
|
|
|
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->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 DEFINE_MUTEX(ataflop_probe_lock); |
|
|
|
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; |
|
mutex_lock(&ataflop_probe_lock); |
|
if (!unit[drive].disk[type]) { |
|
if (ataflop_alloc_disk(drive, type) == 0) |
|
add_disk(unit[drive].disk[type]); |
|
} |
|
mutex_unlock(&ataflop_probe_lock); |
|
} |
|
|
|
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; |
|
|
|
mutex_lock(&ataflop_probe_lock); |
|
ret = __register_blkdev(FLOPPY_MAJOR, "fd", ataflop_probe); |
|
if (ret) |
|
goto out_unlock; |
|
|
|
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; |
|
add_disk(unit[i].disk[0]); |
|
} |
|
|
|
printk(KERN_INFO "Atari floppy driver: max. %cD, %strack buffering\n", |
|
DriveType == 0 ? 'D' : DriveType == 1 ? 'H' : 'E', |
|
UseTrackbuffer ? "" : "no "); |
|
config_types(); |
|
|
|
return 0; |
|
|
|
err: |
|
while (--i >= 0) { |
|
blk_cleanup_queue(unit[i].disk[0]->queue); |
|
put_disk(unit[i].disk[0]); |
|
blk_mq_free_tag_set(&unit[i].tag_set); |
|
} |
|
|
|
unregister_blkdev(FLOPPY_MAJOR, "fd"); |
|
out_unlock: |
|
mutex_unlock(&ataflop_probe_lock); |
|
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) |
|
{ |
|
int i, 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]); |
|
blk_cleanup_queue(unit[i].disk[type]->queue); |
|
put_disk(unit[i].disk[type]); |
|
} |
|
blk_mq_free_tag_set(&unit[i].tag_set); |
|
} |
|
unregister_blkdev(FLOPPY_MAJOR, "fd"); |
|
|
|
del_timer_sync(&fd_timer); |
|
atari_stram_free( DMABuffer ); |
|
} |
|
|
|
module_init(atari_floppy_init) |
|
module_exit(atari_floppy_exit) |
|
|
|
MODULE_LICENSE("GPL");
|
|
|