mirror of https://gitee.com/openkylin/linux.git
2121 lines
55 KiB
C
2121 lines
55 KiB
C
// 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/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;
|
|
int ref;
|
|
int type;
|
|
struct blk_mq_tag_set tag_set;
|
|
} 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)
|
|
{
|
|
if (!blk_update_request(fd_request, err,
|
|
blk_rq_cur_bytes(fd_request))) {
|
|
__blk_mq_end_request(fd_request, err);
|
|
fd_request = NULL;
|
|
}
|
|
}
|
|
|
|
static inline void start_motor_off_timer(void)
|
|
{
|
|
mod_timer(&motor_off_timer, jiffies + FD_MOTOR_OFF_DELAY);
|
|
MotorOffTrys = 0;
|
|
}
|
|
|
|
static inline void start_check_change_timer( void )
|
|
{
|
|
mod_timer(&fd_timer, jiffies + CHECK_CHANGE_DELAY);
|
|
}
|
|
|
|
static inline void start_timeout(void)
|
|
{
|
|
mod_timer(&timeout_timer, jiffies + FLOPPY_TIMEOUT);
|
|
}
|
|
|
|
static inline void stop_timeout(void)
|
|
{
|
|
del_timer(&timeout_timer);
|
|
}
|
|
|
|
/* Select the side to use. */
|
|
|
|
static void fd_select_side( int side )
|
|
{
|
|
unsigned long flags;
|
|
|
|
/* protect against various other ints mucking around with the PSG */
|
|
local_irq_save(flags);
|
|
|
|
sound_ym.rd_data_reg_sel = 14; /* Select PSG Port A */
|
|
sound_ym.wd_data = (side == 0) ? sound_ym.rd_data_reg_sel | 0x01 :
|
|
sound_ym.rd_data_reg_sel & 0xfe;
|
|
|
|
local_irq_restore(flags);
|
|
}
|
|
|
|
|
|
/* Select a drive, update the FDC's track register and set the correct
|
|
* clock speed for this disk's type.
|
|
*/
|
|
|
|
static void fd_select_drive( int drive )
|
|
{
|
|
unsigned long flags;
|
|
unsigned char tmp;
|
|
|
|
if (drive == SelectedDrive)
|
|
return;
|
|
|
|
/* protect against various other ints mucking around with the PSG */
|
|
local_irq_save(flags);
|
|
sound_ym.rd_data_reg_sel = 14; /* Select PSG Port A */
|
|
tmp = sound_ym.rd_data_reg_sel;
|
|
sound_ym.wd_data = (tmp | DSKDRVNONE) & ~(drive == 0 ? DSKDRV0 : DSKDRV1);
|
|
atari_dont_touch_floppy_select = 1;
|
|
local_irq_restore(flags);
|
|
|
|
/* restore track register to saved value */
|
|
FDC_WRITE( FDCREG_TRACK, UD.track );
|
|
udelay(25);
|
|
|
|
/* select 8/16 MHz */
|
|
if (UDT)
|
|
if (ATARIHW_PRESENT(FDCSPEED))
|
|
dma_wd.fdc_speed = UDT->fdc_speed;
|
|
|
|
SelectedDrive = drive;
|
|
}
|
|
|
|
|
|
/* Deselect both drives. */
|
|
|
|
static void fd_deselect( void )
|
|
{
|
|
unsigned long flags;
|
|
|
|
/* protect against various other ints mucking around with the PSG */
|
|
local_irq_save(flags);
|
|
atari_dont_touch_floppy_select = 0;
|
|
sound_ym.rd_data_reg_sel=14; /* Select PSG Port A */
|
|
sound_ym.wd_data = (sound_ym.rd_data_reg_sel |
|
|
(MACH_IS_FALCON ? 3 : 7)); /* no drives selected */
|
|
/* On Falcon, the drive B select line is used on the printer port, so
|
|
* leave it alone... */
|
|
SelectedDrive = -1;
|
|
local_irq_restore(flags);
|
|
}
|
|
|
|
|
|
/* This timer function deselects the drives when the FDC switched the
|
|
* motor off. The deselection cannot happen earlier because the FDC
|
|
* counts the index signals, which arrive only if one drive is selected.
|
|
*/
|
|
|
|
static void fd_motor_off_timer(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 = unit[drive].disk->queue;
|
|
unsigned char *p;
|
|
int sect, nsect;
|
|
unsigned long flags;
|
|
int ret;
|
|
|
|
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) {
|
|
if (--type >= NUM_DISK_MINORS ||
|
|
minor2disktype[type].drive_types > DriveType) {
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
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,
|
|
SUDT->blocks);
|
|
} else
|
|
Probing = 0;
|
|
}
|
|
else {
|
|
if (SUD.flags & FTD_MSG)
|
|
printk(KERN_INFO "fd%d: Auto-detected floppy type %s\n",
|
|
SelectedDrive, SUDT->name );
|
|
Probing=0;
|
|
}
|
|
} else {
|
|
/* record not found, but not probing. Maybe stretch wrong ? Restart probing */
|
|
if (SUD.autoprobe) {
|
|
SUDT = atari_disk_type + StartDiskType[DriveType];
|
|
set_capacity(unit[SelectedDrive].disk,
|
|
SUDT->blocks);
|
|
Probing = 1;
|
|
}
|
|
}
|
|
if (Probing) {
|
|
if (ATARIHW_PRESENT(FDCSPEED)) {
|
|
dma_wd.fdc_speed = SUDT->fdc_speed;
|
|
MFPDELAY();
|
|
}
|
|
setup_req_params( SelectedDrive );
|
|
BufferDrive = -1;
|
|
do_fd_action( SelectedDrive );
|
|
return;
|
|
}
|
|
|
|
printk(KERN_ERR "fd%d: sector %d not found (side %d, track %d)\n",
|
|
SelectedDrive, FDC_READ (FDCREG_SECTOR), ReqSide, ReqTrack );
|
|
goto err_end;
|
|
}
|
|
if (status & FDCSTAT_CRC) {
|
|
printk(KERN_ERR "fd%d: CRC error (side %d, track %d, sector %d)\n",
|
|
SelectedDrive, ReqSide, ReqTrack, FDC_READ (FDCREG_SECTOR) );
|
|
goto err_end;
|
|
}
|
|
if (status & FDCSTAT_LOST) {
|
|
printk(KERN_ERR "fd%d: lost data (side %d, track %d, sector %d)\n",
|
|
SelectedDrive, ReqSide, ReqTrack, FDC_READ (FDCREG_SECTOR) );
|
|
goto err_end;
|
|
}
|
|
|
|
Probing = 0;
|
|
|
|
if (ReqCmd == READ) {
|
|
if (!read_track) {
|
|
void *addr;
|
|
addr = ATARIHW_PRESENT( EXTD_DMA ) ? ReqData : DMABuffer;
|
|
dma_cache_maintenance( virt_to_phys(addr), 512, 0 );
|
|
if (!ATARIHW_PRESENT( EXTD_DMA ))
|
|
copy_buffer (addr, ReqData);
|
|
} else {
|
|
dma_cache_maintenance( PhysTrackBuffer, MaxSectors[DriveType] * 512, 0 );
|
|
BufferDrive = SelectedDrive;
|
|
BufferSide = ReqSide;
|
|
BufferTrack = ReqTrack;
|
|
copy_buffer (SECTOR_BUFFER (ReqSector), ReqData);
|
|
}
|
|
}
|
|
|
|
if (++ReqCnt < blk_rq_cur_sectors(fd_request)) {
|
|
/* read next sector */
|
|
setup_req_params( SelectedDrive );
|
|
do_fd_action( SelectedDrive );
|
|
}
|
|
else {
|
|
/* all sectors finished */
|
|
fd_end_request_cur(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(floppy->disk, UDT->blocks);
|
|
UD.autoprobe = 1;
|
|
}
|
|
}
|
|
else {
|
|
/* user supplied disk type */
|
|
if (--type >= NUM_DISK_MINORS) {
|
|
printk(KERN_WARNING "fd%d: invalid disk format", drive );
|
|
fd_end_request_cur(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(floppy->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(floppy->disk, UDT->blocks);
|
|
|
|
if (cmd == FDDEFPRM) {
|
|
/* save settings as permanent default type */
|
|
default_params[drive].name = dtp->name;
|
|
default_params[drive].spt = dtp->spt;
|
|
default_params[drive].blocks = dtp->blocks;
|
|
default_params[drive].fdc_speed = dtp->fdc_speed;
|
|
default_params[drive].stretch = dtp->stretch;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
}
|
|
|
|
/* no matching disk type found above - setting user_params */
|
|
|
|
if (cmd == FDDEFPRM) {
|
|
/* set permanent type */
|
|
dtp = &default_params[drive];
|
|
} else
|
|
/* set user type (reset by disk change!) */
|
|
dtp = &user_params[drive];
|
|
|
|
dtp->name = "user format";
|
|
dtp->blocks = setprm.size;
|
|
dtp->spt = setprm.sect;
|
|
if (setprm.sect > 14)
|
|
dtp->fdc_speed = 3;
|
|
else
|
|
dtp->fdc_speed = 0;
|
|
dtp->stretch = setprm.stretch;
|
|
|
|
if (UD.flags & FTD_MSG)
|
|
printk (KERN_INFO "floppy%d: blk %d spt %d str %d!\n",
|
|
drive, dtp->blocks, dtp->spt, dtp->stretch);
|
|
|
|
/* sanity check */
|
|
if (setprm.track != dtp->blocks/dtp->spt/2 ||
|
|
setprm.head != 2)
|
|
return -EINVAL;
|
|
|
|
UDT = dtp;
|
|
set_capacity(floppy->disk, UDT->blocks);
|
|
|
|
return 0;
|
|
case FDMSGON:
|
|
UD.flags |= FTD_MSG;
|
|
return 0;
|
|
case FDMSGOFF:
|
|
UD.flags &= ~FTD_MSG;
|
|
return 0;
|
|
case FDSETEMSGTRESH:
|
|
return -EINVAL;
|
|
case FDFMTBEG:
|
|
return 0;
|
|
case FDFMTTRK:
|
|
if (floppy->ref != 1 && floppy->ref != -1)
|
|
return -EBUSY;
|
|
if (copy_from_user(&fmt_desc, argp, sizeof(fmt_desc)))
|
|
return -EFAULT;
|
|
return do_format(drive, type, &fmt_desc);
|
|
case FDCLRPRM:
|
|
UDT = NULL;
|
|
/* MSch: invalidate default_params */
|
|
default_params[drive].blocks = 0;
|
|
set_capacity(floppy->disk, MAX_DISK_SIZE * 2);
|
|
/* Fall through */
|
|
case FDFMTEND:
|
|
case FDFLUSH:
|
|
/* invalidate the buffer track to force a reread */
|
|
BufferDrive = -1;
|
|
set_bit(drive, &fake_change);
|
|
check_disk_change(bdev);
|
|
return 0;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
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)) {
|
|
check_disk_change(bdev);
|
|
if (mode & FMODE_WRITE) {
|
|
if (p->wpstat) {
|
|
if (p->ref < 0)
|
|
p->ref = 0;
|
|
else
|
|
p->ref--;
|
|
return -EROFS;
|
|
}
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int floppy_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,
|
|
.revalidate_disk= floppy_revalidate,
|
|
};
|
|
|
|
static const struct blk_mq_ops ataflop_mq_ops = {
|
|
.queue_rq = ataflop_queue_rq,
|
|
.commit_rqs = ataflop_commit_rqs,
|
|
};
|
|
|
|
static struct kobject *floppy_find(dev_t dev, int *part, void *data)
|
|
{
|
|
int drive = *part & 3;
|
|
int type = *part >> 2;
|
|
if (drive >= FD_MAX_UNITS || type > NUM_DISK_MINORS)
|
|
return NULL;
|
|
*part = 0;
|
|
return get_disk_and_module(unit[drive].disk);
|
|
}
|
|
|
|
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;
|
|
|
|
if (register_blkdev(FLOPPY_MAJOR,"fd"))
|
|
return -EBUSY;
|
|
|
|
for (i = 0; i < FD_MAX_UNITS; i++) {
|
|
unit[i].disk = alloc_disk(1);
|
|
if (!unit[i].disk) {
|
|
ret = -ENOMEM;
|
|
goto err;
|
|
}
|
|
|
|
unit[i].disk->queue = blk_mq_init_sq_queue(&unit[i].tag_set,
|
|
&ataflop_mq_ops, 2,
|
|
BLK_MQ_F_SHOULD_MERGE);
|
|
if (IS_ERR(unit[i].disk->queue)) {
|
|
put_disk(unit[i].disk);
|
|
ret = PTR_ERR(unit[i].disk->queue);
|
|
unit[i].disk->queue = NULL;
|
|
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;
|
|
unit[i].disk->major = FLOPPY_MAJOR;
|
|
unit[i].disk->first_minor = i;
|
|
sprintf(unit[i].disk->disk_name, "fd%d", i);
|
|
unit[i].disk->fops = &floppy_fops;
|
|
unit[i].disk->events = DISK_EVENT_MEDIA_CHANGE;
|
|
unit[i].disk->private_data = &unit[i];
|
|
set_capacity(unit[i].disk, MAX_DISK_SIZE * 2);
|
|
add_disk(unit[i].disk);
|
|
}
|
|
|
|
blk_register_region(MKDEV(FLOPPY_MAJOR, 0), 256, THIS_MODULE,
|
|
floppy_find, NULL, NULL);
|
|
|
|
printk(KERN_INFO "Atari floppy driver: max. %cD, %strack buffering\n",
|
|
DriveType == 0 ? 'D' : DriveType == 1 ? 'H' : 'E',
|
|
UseTrackbuffer ? "" : "no ");
|
|
config_types();
|
|
|
|
return 0;
|
|
|
|
err:
|
|
while (--i >= 0) {
|
|
struct gendisk *disk = unit[i].disk;
|
|
|
|
blk_cleanup_queue(disk->queue);
|
|
blk_mq_free_tag_set(&unit[i].tag_set);
|
|
put_disk(unit[i].disk);
|
|
}
|
|
|
|
unregister_blkdev(FLOPPY_MAJOR, "fd");
|
|
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;
|
|
blk_unregister_region(MKDEV(FLOPPY_MAJOR, 0), 256);
|
|
for (i = 0; i < FD_MAX_UNITS; i++) {
|
|
del_gendisk(unit[i].disk);
|
|
blk_cleanup_queue(unit[i].disk->queue);
|
|
blk_mq_free_tag_set(&unit[i].tag_set);
|
|
put_disk(unit[i].disk);
|
|
}
|
|
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");
|