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[/] [or1k/] [tags/] [before_ORP/] [uclinux/] [uClinux-2.0.x/] [drivers/] [block/] [floppy.c] - Rev 1765
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/* * linux/kernel/floppy.c * * Copyright (C) 1991, 1992 Linus Torvalds * Copyright (C) 1993, 1994 Alain Knaff */ /* * 02.12.91 - Changed to static variables to indicate need for reset * and recalibrate. This makes some things easier (output_byte reset * checking etc), and means less interrupt jumping in case of errors, * so the code is hopefully easier to understand. */ /* * This file is certainly a mess. I've tried my best to get it working, * but I don't like programming floppies, and I have only one anyway. * Urgel. I should check for more errors, and do more graceful error * recovery. Seems there are problems with several drives. I've tried to * correct them. No promises. */ /* * As with hd.c, all routines within this file can (and will) be called * by interrupts, so extreme caution is needed. A hardware interrupt * handler may not sleep, or a kernel panic will happen. Thus I cannot * call "floppy-on" directly, but have to set a special timer interrupt * etc. */ /* * 28.02.92 - made track-buffering routines, based on the routines written * by entropy@wintermute.wpi.edu (Lawrence Foard). Linus. */ /* * Automatic floppy-detection and formatting written by Werner Almesberger * (almesber@nessie.cs.id.ethz.ch), who also corrected some problems with * the floppy-change signal detection. */ /* * 1992/7/22 -- Hennus Bergman: Added better error reporting, fixed * FDC data overrun bug, added some preliminary stuff for vertical * recording support. * * 1992/9/17: Added DMA allocation & DMA functions. -- hhb. * * TODO: Errors are still not counted properly. */ /* 1992/9/20 * Modifications for ``Sector Shifting'' by Rob Hooft (hooft@chem.ruu.nl) * modeled after the freeware MS-DOS program fdformat/88 V1.8 by * Christoph H. Hochst\"atter. * I have fixed the shift values to the ones I always use. Maybe a new * ioctl() should be created to be able to modify them. * There is a bug in the driver that makes it impossible to format a * floppy as the first thing after bootup. */ /* * 1993/4/29 -- Linus -- cleaned up the timer handling in the kernel, and * this helped the floppy driver as well. Much cleaner, and still seems to * work. */ /* 1994/6/24 --bbroad-- added the floppy table entries and made * minor modifications to allow 2.88 floppies to be run. */ /* 1994/7/13 -- Paul Vojta -- modified the probing code to allow three or more * disk types. */ /* * 1994/8/8 -- Alain Knaff -- Switched to fdpatch driver: Support for bigger * format bug fixes, but unfortunately some new bugs too... */ /* 1994/9/17 -- Koen Holtman -- added logging of physical floppy write * errors to allow safe writing by specialized programs. */ /* 1995/4/24 -- Dan Fandrich -- added support for Commodore 1581 3.5" disks * by defining bit 1 of the "stretch" parameter to mean put sectors on the * opposite side of the disk, leaving the sector IDs alone (i.e. Commodore's * drives are "upside-down"). */ /* * 1995/8/26 -- Andreas Busse -- added Mips support. */ /* * 1995/10/18 -- Ralf Baechle -- Portability cleanup; move machine dependent * features to asm/floppy.h. */ /* * 1999/02/23 -- Paul Slootman -- floppy stopped working on Alpha after 24 * days, 6 hours, 32 minutes and 32 seconds (i.e. MAXINT jiffies; ints were * being used to store jiffies, which are unsigned longs). */ #define FLOPPY_SANITY_CHECK #undef FLOPPY_SILENT_DCL_CLEAR #define REALLY_SLOW_IO #define DEBUGT 2 #define DCL_DEBUG /* debug disk change line */ /* do print messages for unexpected interrupts */ static int print_unex=1; #include <linux/utsname.h> #include <linux/module.h> /* the following is the mask of allowed drives. By default units 2 and * 3 of both floppy controllers are disabled, because switching on the * motor of these drives causes system hangs on some PCI computers. drive * 0 is the low bit (0x1), and drive 7 is the high bit (0x80). Bits are on if * a drive is allowed. */ static int FLOPPY_IRQ=6; static int FLOPPY_DMA=2; static int allowed_drive_mask = 0x33; static int irqdma_allocated = 0; #include <linux/sched.h> #include <linux/fs.h> #include <linux/kernel.h> #include <linux/timer.h> #include <linux/tqueue.h> #define FDPATCHES #include <linux/fdreg.h> #include <linux/fd.h> #define OLDFDRAWCMD 0x020d /* send a raw command to the FDC */ struct old_floppy_raw_cmd { void *data; long length; unsigned char rate; unsigned char flags; unsigned char cmd_count; unsigned char cmd[9]; unsigned char reply_count; unsigned char reply[7]; int track; }; #include <linux/errno.h> #include <linux/malloc.h> #include <linux/mm.h> #include <linux/string.h> #include <linux/fcntl.h> #include <linux/delay.h> #include <linux/mc146818rtc.h> /* CMOS defines */ #include <linux/ioport.h> #include <linux/interrupt.h> #include <asm/dma.h> #include <asm/irq.h> #include <asm/system.h> #include <asm/io.h> #include <asm/segment.h> static int use_virtual_dma=0; /* virtual DMA for Intel */ static unsigned short virtual_dma_port=0x3f0; void floppy_interrupt(int irq, void *dev_id, struct pt_regs * regs); static int set_dor(int fdc, char mask, char data); static inline int __get_order(unsigned long size); #include <asm/floppy.h> #define MAJOR_NR FLOPPY_MAJOR #include <linux/blk.h> #include <linux/cdrom.h> /* for the compatibility eject ioctl */ #ifndef FLOPPY_MOTOR_MASK #define FLOPPY_MOTOR_MASK 0xf0 #endif #ifndef fd_get_dma_residue #define fd_get_dma_residue() get_dma_residue(FLOPPY_DMA) #endif /* Dma Memory related stuff */ /* Pure 2^n version of get_order */ static inline int __get_order(unsigned long size) { int order; size = (size-1) >> (PAGE_SHIFT-1); order = -1; do { size >>= 1; order++; } while (size); return order; } #ifndef fd_dma_mem_free #define fd_dma_mem_free(addr, size) free_pages(addr, __get_order(size)) #endif #ifndef fd_dma_mem_alloc #define fd_dma_mem_alloc(size) __get_dma_pages(GFP_KERNEL,__get_order(size)) #endif /* End dma memory related stuff */ static unsigned int fake_change = 0; static int initialising=1; static inline int TYPE(kdev_t x) { return (MINOR(x)>>2) & 0x1f; } static inline int DRIVE(kdev_t x) { return (MINOR(x)&0x03) | ((MINOR(x)&0x80) >> 5); } #define ITYPE(x) (((x)>>2) & 0x1f) #define TOMINOR(x) ((x & 3) | ((x & 4) << 5)) #define UNIT(x) ((x) & 0x03) /* drive on fdc */ #define FDC(x) (((x) & 0x04) >> 2) /* fdc of drive */ #define REVDRIVE(fdc, unit) ((unit) + ((fdc) << 2)) /* reverse mapping from unit and fdc to drive */ #define DP (&drive_params[current_drive]) #define DRS (&drive_state[current_drive]) #define DRWE (&write_errors[current_drive]) #define FDCS (&fdc_state[fdc]) #define CLEARF(x) (clear_bit(x##_BIT, &DRS->flags)) #define SETF(x) (set_bit(x##_BIT, &DRS->flags)) #define TESTF(x) (test_bit(x##_BIT, &DRS->flags)) #define UDP (&drive_params[drive]) #define UDRS (&drive_state[drive]) #define UDRWE (&write_errors[drive]) #define UFDCS (&fdc_state[FDC(drive)]) #define UCLEARF(x) (clear_bit(x##_BIT, &UDRS->flags)) #define USETF(x) (set_bit(x##_BIT, &UDRS->flags)) #define UTESTF(x) (test_bit(x##_BIT, &UDRS->flags)) #define DPRINT(format, args...) printk(DEVICE_NAME "%d: " format, current_drive , ## args) #define PH_HEAD(floppy,head) (((((floppy)->stretch & 2) >>1) ^ head) << 2) #define STRETCH(floppy) ((floppy)->stretch & FD_STRETCH) #define CLEARSTRUCT(x) memset((x), 0, sizeof(*(x))) #define INT_OFF save_flags(flags); cli() #define INT_ON restore_flags(flags) /* read/write */ #define COMMAND raw_cmd->cmd[0] #define DR_SELECT raw_cmd->cmd[1] #define TRACK raw_cmd->cmd[2] #define HEAD raw_cmd->cmd[3] #define SECTOR raw_cmd->cmd[4] #define SIZECODE raw_cmd->cmd[5] #define SECT_PER_TRACK raw_cmd->cmd[6] #define GAP raw_cmd->cmd[7] #define SIZECODE2 raw_cmd->cmd[8] #define NR_RW 9 /* format */ #define F_SIZECODE raw_cmd->cmd[2] #define F_SECT_PER_TRACK raw_cmd->cmd[3] #define F_GAP raw_cmd->cmd[4] #define F_FILL raw_cmd->cmd[5] #define NR_F 6 /* * Maximum disk size (in kilobytes). This default is used whenever the * current disk size is unknown. * [Now it is rather a minimum] */ #define MAX_DISK_SIZE 4 /* 3984*/ #define K_64 0x10000 /* 64KB */ /* * globals used by 'result()' */ #define MAX_REPLIES 16 static unsigned char reply_buffer[MAX_REPLIES]; static int inr; /* size of reply buffer, when called from interrupt */ #define ST0 (reply_buffer[0]) #define ST1 (reply_buffer[1]) #define ST2 (reply_buffer[2]) #define ST3 (reply_buffer[0]) /* result of GETSTATUS */ #define R_TRACK (reply_buffer[3]) #define R_HEAD (reply_buffer[4]) #define R_SECTOR (reply_buffer[5]) #define R_SIZECODE (reply_buffer[6]) #define SEL_DLY (2*HZ/100) #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0])) /* * this struct defines the different floppy drive types. */ static struct { struct floppy_drive_params params; const char *name; /* name printed while booting */ } default_drive_params[]= { /* NOTE: the time values in jiffies should be in msec! CMOS drive type | Maximum data rate supported by drive type | | Head load time, msec | | | Head unload time, msec (not used) | | | | Step rate interval, usec | | | | | Time needed for spinup time (jiffies) | | | | | | Timeout for spinning down (jiffies) | | | | | | | Spindown offset (where disk stops) | | | | | | | | Select delay | | | | | | | | | RPS | | | | | | | | | | Max number of tracks | | | | | | | | | | | Interrupt timeout | | | | | | | | | | | | Max nonintlv. sectors | | | | | | | | | | | | | -Max Errors- flags */ {{0, 500, 16, 16, 8000, 1*HZ, 3*HZ, 0, SEL_DLY, 5, 80, 3*HZ, 20, {3,1,2,0,2}, 0, 0, { 7, 4, 8, 2, 1, 5, 3,10}, 3*HZ/2, 0 }, "unknown" }, {{1, 300, 16, 16, 8000, 1*HZ, 3*HZ, 0, SEL_DLY, 5, 40, 3*HZ, 17, {3,1,2,0,2}, 0, 0, { 1, 0, 0, 0, 0, 0, 0, 0}, 3*HZ/2, 1 }, "360K PC" }, /*5 1/4 360 KB PC*/ {{2, 500, 16, 16, 6000, 4*HZ/10, 3*HZ, 14, SEL_DLY, 6, 83, 3*HZ, 17, {3,1,2,0,2}, 0, 0, { 2, 5, 6,23,10,20,12, 0}, 3*HZ/2, 2 }, "1.2M" }, /*5 1/4 HD AT*/ {{3, 250, 16, 16, 3000, 1*HZ, 3*HZ, 0, SEL_DLY, 5, 83, 3*HZ, 20, {3,1,2,0,2}, 0, 0, { 4,22,21,30, 3, 0, 0, 0}, 3*HZ/2, 4 }, "720k" }, /*3 1/2 DD*/ {{4, 500, 16, 16, 4000, 4*HZ/10, 3*HZ, 10, SEL_DLY, 5, 83, 3*HZ, 20, {3,1,2,0,2}, 0, 0, { 7, 4,25,22,31,21,29,11}, 3*HZ/2, 7 }, "1.44M" }, /*3 1/2 HD*/ {{5, 1000, 15, 8, 3000, 4*HZ/10, 3*HZ, 10, SEL_DLY, 5, 83, 3*HZ, 40, {3,1,2,0,2}, 0, 0, { 7, 8, 4,25,28,22,31,21}, 3*HZ/2, 8 }, "2.88M AMI BIOS" }, /*3 1/2 ED*/ {{6, 1000, 15, 8, 3000, 4*HZ/10, 3*HZ, 10, SEL_DLY, 5, 83, 3*HZ, 40, {3,1,2,0,2}, 0, 0, { 7, 8, 4,25,28,22,31,21}, 3*HZ/2, 8 }, "2.88M" } /*3 1/2 ED*/ /* | --autodetected formats--- | | | * read_track | | Name printed when booting * | Native format * Frequency of disk change checks */ }; static struct floppy_drive_params drive_params[N_DRIVE]; static struct floppy_drive_struct drive_state[N_DRIVE]; static struct floppy_write_errors write_errors[N_DRIVE]; static struct floppy_raw_cmd *raw_cmd, default_raw_cmd; /* * This struct defines the different floppy types. * * Bit 0 of 'stretch' tells if the tracks need to be doubled for some * types (e.g. 360kB diskette in 1.2MB drive, etc.). Bit 1 of 'stretch' * tells if the disk is in Commodore 1581 format, which means side 0 sectors * are located on side 1 of the disk but with a side 0 ID, and vice-versa. * This is the same as the Sharp MZ-80 5.25" CP/M disk format, except that the * 1581's logical side 0 is on physical side 1, whereas the Sharp's logical * side 0 is on physical side 0 (but with the misnamed sector IDs). * 'stretch' should probably be renamed to something more general, like * 'options'. Other parameters should be self-explanatory (see also * setfdprm(8)). */ static struct floppy_struct floppy_type[32] = { { 0, 0,0, 0,0,0x00,0x00,0x00,0x00,NULL }, /* 0 no testing */ { 720, 9,2,40,0,0x2A,0x02,0xDF,0x50,"d360" }, /* 1 360KB PC */ { 2400,15,2,80,0,0x1B,0x00,0xDF,0x54,"h1200" }, /* 2 1.2MB AT */ { 720, 9,1,80,0,0x2A,0x02,0xDF,0x50,"D360" }, /* 3 360KB SS 3.5" */ { 1440, 9,2,80,0,0x2A,0x02,0xDF,0x50,"D720" }, /* 4 720KB 3.5" */ { 720, 9,2,40,1,0x23,0x01,0xDF,0x50,"h360" }, /* 5 360KB AT */ { 1440, 9,2,80,0,0x23,0x01,0xDF,0x50,"h720" }, /* 6 720KB AT */ { 2880,18,2,80,0,0x1B,0x00,0xCF,0x6C,"H1440" }, /* 7 1.44MB 3.5" */ { 5760,36,2,80,0,0x1B,0x43,0xAF,0x54,"E2880" }, /* 8 2.88MB 3.5" */ { 6240,39,2,80,0,0x1B,0x43,0xAF,0x28,"E3120"}, /* 9 3.12MB 3.5" */ { 2880,18,2,80,0,0x25,0x00,0xDF,0x02,"h1440" }, /* 10 1.44MB 5.25" */ { 3360,21,2,80,0,0x1C,0x00,0xCF,0x0C,"H1680" }, /* 11 1.68MB 3.5" */ { 820,10,2,41,1,0x25,0x01,0xDF,0x2E,"h410" }, /* 12 410KB 5.25" */ { 1640,10,2,82,0,0x25,0x02,0xDF,0x2E,"H820" }, /* 13 820KB 3.5" */ { 2952,18,2,82,0,0x25,0x00,0xDF,0x02,"h1476" }, /* 14 1.48MB 5.25" */ { 3444,21,2,82,0,0x25,0x00,0xDF,0x0C,"H1722" }, /* 15 1.72MB 3.5" */ { 840,10,2,42,1,0x25,0x01,0xDF,0x2E,"h420" }, /* 16 420KB 5.25" */ { 1660,10,2,83,0,0x25,0x02,0xDF,0x2E,"H830" }, /* 17 830KB 3.5" */ { 2988,18,2,83,0,0x25,0x00,0xDF,0x02,"h1494" }, /* 18 1.49MB 5.25" */ { 3486,21,2,83,0,0x25,0x00,0xDF,0x0C,"H1743" }, /* 19 1.74 MB 3.5" */ { 1760,11,2,80,0,0x1C,0x09,0xCF,0x00,"h880" }, /* 20 880KB 5.25" */ { 2080,13,2,80,0,0x1C,0x01,0xCF,0x00,"D1040" }, /* 21 1.04MB 3.5" */ { 2240,14,2,80,0,0x1C,0x19,0xCF,0x00,"D1120" }, /* 22 1.12MB 3.5" */ { 3200,20,2,80,0,0x1C,0x20,0xCF,0x2C,"h1600" }, /* 23 1.6MB 5.25" */ { 3520,22,2,80,0,0x1C,0x08,0xCF,0x2e,"H1760" }, /* 24 1.76MB 3.5" */ { 3840,24,2,80,0,0x1C,0x20,0xCF,0x00,"H1920" }, /* 25 1.92MB 3.5" */ { 6400,40,2,80,0,0x25,0x5B,0xCF,0x00,"E3200" }, /* 26 3.20MB 3.5" */ { 7040,44,2,80,0,0x25,0x5B,0xCF,0x00,"E3520" }, /* 27 3.52MB 3.5" */ { 7680,48,2,80,0,0x25,0x63,0xCF,0x00,"E3840" }, /* 28 3.84MB 3.5" */ { 3680,23,2,80,0,0x1C,0x10,0xCF,0x00,"H1840" }, /* 29 1.84MB 3.5" */ { 1600,10,2,80,0,0x25,0x02,0xDF,0x2E,"D800" }, /* 30 800KB 3.5" */ { 3200,20,2,80,0,0x1C,0x00,0xCF,0x2C,"H1600" }, /* 31 1.6MB 3.5" */ }; #define NUMBER(x) (sizeof(x) / sizeof(*(x))) #define SECTSIZE (_FD_SECTSIZE(*floppy)) /* Auto-detection: Disk type used until the next media change occurs. */ static struct floppy_struct *current_type[N_DRIVE] = { NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL }; /* * User-provided type information. current_type points to * the respective entry of this array. */ static struct floppy_struct user_params[N_DRIVE]; static int floppy_sizes[256]; static int floppy_blocksizes[256] = { 0, }; /* * The driver is trying to determine the correct media format * while probing is set. rw_interrupt() clears it after a * successful access. */ static int probing = 0; /* Synchronization of FDC access. */ #define FD_COMMAND_NONE -1 #define FD_COMMAND_ERROR 2 #define FD_COMMAND_OKAY 3 static volatile int command_status = FD_COMMAND_NONE, fdc_busy = 0; static struct wait_queue *fdc_wait = NULL, *command_done = NULL; #define NO_SIGNAL (!(current->signal & ~current->blocked) || !interruptible) #define CALL(x) if ((x) == -EINTR) return -EINTR #define ECALL(x) if ((ret = (x))) return ret; #define _WAIT(x,i) CALL(ret=wait_til_done((x),i)) #define WAIT(x) _WAIT((x),interruptible) #define IWAIT(x) _WAIT((x),1) /* Errors during formatting are counted here. */ static int format_errors; /* Format request descriptor. */ static struct format_descr format_req; /* * Rate is 0 for 500kb/s, 1 for 300kbps, 2 for 250kbps * Spec1 is 0xSH, where S is stepping rate (F=1ms, E=2ms, D=3ms etc), * H is head unload time (1=16ms, 2=32ms, etc) */ /* * Track buffer * Because these are written to by the DMA controller, they must * not contain a 64k byte boundary crossing, or data will be * corrupted/lost. */ static char *floppy_track_buffer=0; static int max_buffer_sectors=0; static int *errors; typedef void (*done_f)(int); static struct cont_t { void (*interrupt)(void); /* this is called after the interrupt of the * main command */ void (*redo)(void); /* this is called to retry the operation */ void (*error)(void); /* this is called to tally an error */ done_f done; /* this is called to say if the operation has * succeeded/failed */ } *cont=NULL; static void floppy_ready(void); static void floppy_start(void); static void process_fd_request(void); static void recalibrate_floppy(void); static void floppy_shutdown(void); static int floppy_grab_irq_and_dma(void); static void floppy_release_irq_and_dma(void); /* * The "reset" variable should be tested whenever an interrupt is scheduled, * after the commands have been sent. This is to ensure that the driver doesn't * get wedged when the interrupt doesn't come because of a failed command. * reset doesn't need to be tested before sending commands, because * output_byte is automatically disabled when reset is set. */ #define CHECK_RESET { if (FDCS->reset){ reset_fdc(); return; } } static void reset_fdc(void); /* * These are global variables, as that's the easiest way to give * information to interrupts. They are the data used for the current * request. */ #define NO_TRACK -1 #define NEED_1_RECAL -2 #define NEED_2_RECAL -3 /* */ static int usage_count = 0; /* buffer related variables */ static int buffer_track = -1; static int buffer_drive = -1; static int buffer_min = -1; static int buffer_max = -1; /* fdc related variables, should end up in a struct */ static struct floppy_fdc_state fdc_state[N_FDC]; static int fdc; /* current fdc */ static struct floppy_struct *_floppy = floppy_type; static unsigned char current_drive = 0; static long current_count_sectors = 0; static unsigned char sector_t; /* sector in track */ static unsigned char in_sector_offset; /* offset within physical sector, * expressed in units of 512 bytes */ #ifndef fd_eject #define fd_eject(x) -EINVAL #endif #ifdef DEBUGT static long unsigned debugtimer; #endif /* * Debugging * ========= */ static inline void set_debugt(void) { #ifdef DEBUGT debugtimer = jiffies; #endif } static inline void debugt(const char *message) { #ifdef DEBUGT if (DP->flags & DEBUGT) printk("%s dtime=%lu\n", message, jiffies-debugtimer); #endif } typedef void (*timeout_fn)(unsigned long); static struct timer_list fd_timeout ={ NULL, NULL, 0, 0, (timeout_fn) floppy_shutdown }; static const char *timeout_message; #ifdef FLOPPY_SANITY_CHECK static void is_alive(const char *message) { /* this routine checks whether the floppy driver is "alive" */ if (fdc_busy && command_status < 2 && !fd_timeout.prev){ DPRINT("timeout handler died: %s\n",message); } } #endif #ifdef FLOPPY_SANITY_CHECK #define OLOGSIZE 20 static void (*lasthandler)(void) = NULL; static unsigned long interruptjiffies=0; static unsigned long resultjiffies=0; static int resultsize=0; static unsigned long lastredo=0; static struct output_log { unsigned char data; unsigned char status; unsigned long jiffies; } output_log[OLOGSIZE]; static int output_log_pos=0; #endif #define CURRENTD -1 #define MAXTIMEOUT -2 static void reschedule_timeout(int drive, const char *message, int marg) { if (drive == CURRENTD) drive = current_drive; del_timer(&fd_timeout); if (drive < 0 || drive > N_DRIVE) { fd_timeout.expires = jiffies + 20UL*HZ; drive=0; } else fd_timeout.expires = jiffies + UDP->timeout; add_timer(&fd_timeout); if (UDP->flags & FD_DEBUG){ DPRINT("reschedule timeout "); printk(message, marg); printk("\n"); } timeout_message = message; } static int maximum(int a, int b) { if(a > b) return a; else return b; } #define INFBOUND(a,b) (a)=maximum((a),(b)); static int minimum(int a, int b) { if(a < b) return a; else return b; } #define SUPBOUND(a,b) (a)=minimum((a),(b)); /* * Bottom half floppy driver. * ========================== * * This part of the file contains the code talking directly to the hardware, * and also the main service loop (seek-configure-spinup-command) */ /* * disk change. * This routine is responsible for maintaining the FD_DISK_CHANGE flag, * and the last_checked date. * * last_checked is the date of the last check which showed 'no disk change' * FD_DISK_CHANGE is set under two conditions: * 1. The floppy has been changed after some i/o to that floppy already * took place. * 2. No floppy disk is in the drive. This is done in order to ensure that * requests are quickly flushed in case there is no disk in the drive. It * follows that FD_DISK_CHANGE can only be cleared if there is a disk in * the drive. * * For 1., maxblock is observed. Maxblock is 0 if no i/o has taken place yet. * For 2., FD_DISK_NEWCHANGE is watched. FD_DISK_NEWCHANGE is cleared on * each seek. If a disk is present, the disk change line should also be * cleared on each seek. Thus, if FD_DISK_NEWCHANGE is clear, but the disk * change line is set, this means either that no disk is in the drive, or * that it has been removed since the last seek. * * This means that we really have a third possibility too: * The floppy has been changed after the last seek. */ static int disk_change(int drive) { int fdc=FDC(drive); #ifdef FLOPPY_SANITY_CHECK if (jiffies - UDRS->select_date < UDP->select_delay) DPRINT("WARNING disk change called early\n"); if (!(FDCS->dor & (0x10 << UNIT(drive))) || (FDCS->dor & 3) != UNIT(drive) || fdc != FDC(drive)){ DPRINT("probing disk change on unselected drive\n"); DPRINT("drive=%d fdc=%d dor=%x\n",drive, FDC(drive), FDCS->dor); } #endif #ifdef DCL_DEBUG if (UDP->flags & FD_DEBUG){ DPRINT("checking disk change line for drive %d\n",drive); DPRINT("jiffies=%lu\n", jiffies); DPRINT("disk change line=%x\n",fd_inb(FD_DIR)&0x80); DPRINT("flags=%x\n",UDRS->flags); } #endif if (UDP->flags & FD_BROKEN_DCL) return UTESTF(FD_DISK_CHANGED); if ((fd_inb(FD_DIR) ^ UDP->flags) & 0x80){ USETF(FD_VERIFY); /* verify write protection */ if (UDRS->maxblock){ /* mark it changed */ USETF(FD_DISK_CHANGED); } /* invalidate its geometry */ if (UDRS->keep_data >= 0) { if ((UDP->flags & FTD_MSG) && current_type[drive] != NULL) DPRINT("Disk type is undefined after " "disk change\n"); current_type[drive] = NULL; floppy_sizes[TOMINOR(drive)] = MAX_DISK_SIZE; } /*USETF(FD_DISK_NEWCHANGE);*/ return 1; } else { UDRS->last_checked=jiffies; UCLEARF(FD_DISK_NEWCHANGE); } return 0; } static inline int is_selected(int dor, int unit) { return ((dor & (0x10 << unit)) && (dor &3) == unit); } static int set_dor(int fdc, char mask, char data) { register unsigned char drive, unit, newdor,olddor; if (FDCS->address == -1) return -1; olddor = FDCS->dor; newdor = (olddor & mask) | data; if (newdor != olddor){ unit = olddor & 0x3; if (is_selected(olddor, unit) && !is_selected(newdor,unit)){ drive = REVDRIVE(fdc,unit); #ifdef DCL_DEBUG if (UDP->flags & FD_DEBUG){ DPRINT("calling disk change from set_dor\n"); } #endif disk_change(drive); } FDCS->dor = newdor; fd_outb(newdor, FD_DOR); unit = newdor & 0x3; if (!is_selected(olddor, unit) && is_selected(newdor,unit)){ drive = REVDRIVE(fdc,unit); UDRS->select_date = jiffies; } } /* FIXME: we should be more graceful here */ if (newdor & FLOPPY_MOTOR_MASK) floppy_grab_irq_and_dma(); if (olddor & FLOPPY_MOTOR_MASK) floppy_release_irq_and_dma(); return olddor; } static void twaddle(void) { if (DP->select_delay) return; fd_outb(FDCS->dor & ~(0x10<<UNIT(current_drive)),FD_DOR); fd_outb(FDCS->dor, FD_DOR); DRS->select_date = jiffies; } /* reset all driver information about the current fdc. This is needed after * a reset, and after a raw command. */ static void reset_fdc_info(int mode) { int drive; FDCS->spec1 = FDCS->spec2 = -1; FDCS->need_configure = 1; FDCS->perp_mode = 1; FDCS->rawcmd = 0; for (drive = 0; drive < N_DRIVE; drive++) if (FDC(drive) == fdc && (mode || UDRS->track != NEED_1_RECAL)) UDRS->track = NEED_2_RECAL; } /* selects the fdc and drive, and enables the fdc's input/dma. */ static void set_fdc(int drive) { if (drive >= 0 && drive < N_DRIVE){ fdc = FDC(drive); current_drive = drive; } if (fdc != 1 && fdc != 0) { printk("bad fdc value\n"); return; } set_dor(fdc,~0,8); #if N_FDC > 1 set_dor(1-fdc, ~8, 0); #endif if (FDCS->rawcmd == 2) reset_fdc_info(1); if (fd_inb(FD_STATUS) != STATUS_READY) FDCS->reset = 1; } /* locks the driver */ static int lock_fdc(int drive, int interruptible) { unsigned long flags; if (!usage_count){ printk(KERN_ERR "trying to lock fdc while usage count=0\n"); return -1; } if(floppy_grab_irq_and_dma()==-1) return -EBUSY; INT_OFF; while (fdc_busy && NO_SIGNAL) interruptible_sleep_on(&fdc_wait); if (fdc_busy){ INT_ON; return -EINTR; } fdc_busy = 1; INT_ON; command_status = FD_COMMAND_NONE; reschedule_timeout(drive, "lock fdc", 0); set_fdc(drive); return 0; } #define LOCK_FDC(drive,interruptible) \ if (lock_fdc(drive,interruptible)) return -EINTR; /* unlocks the driver */ static inline void unlock_fdc(void) { raw_cmd = 0; if (!fdc_busy) DPRINT("FDC access conflict!\n"); if (DEVICE_INTR) DPRINT("device interrupt still active at FDC release: %p!\n", DEVICE_INTR); command_status = FD_COMMAND_NONE; del_timer(&fd_timeout); cont = NULL; fdc_busy = 0; floppy_release_irq_and_dma(); wake_up(&fdc_wait); } /* switches the motor off after a given timeout */ static void motor_off_callback(unsigned long nr) { unsigned char mask = ~(0x10 << UNIT(nr)); set_dor(FDC(nr), mask, 0); } static struct timer_list motor_off_timer[N_DRIVE] = { { NULL, NULL, 0, 0, motor_off_callback }, { NULL, NULL, 0, 1, motor_off_callback }, { NULL, NULL, 0, 2, motor_off_callback }, { NULL, NULL, 0, 3, motor_off_callback }, { NULL, NULL, 0, 4, motor_off_callback }, { NULL, NULL, 0, 5, motor_off_callback }, { NULL, NULL, 0, 6, motor_off_callback }, { NULL, NULL, 0, 7, motor_off_callback } }; /* schedules motor off */ static void floppy_off(unsigned int drive) { unsigned long volatile delta; register int fdc=FDC(drive); if (!(FDCS->dor & (0x10 << UNIT(drive)))) return; del_timer(motor_off_timer+drive); /* make spindle stop in a position which minimizes spinup time * next time */ if (UDP->rps){ delta = jiffies - UDRS->first_read_date + HZ - UDP->spindown_offset; delta = ((delta * UDP->rps) % HZ) / UDP->rps; motor_off_timer[drive].expires = jiffies + UDP->spindown - delta; } add_timer(motor_off_timer+drive); } /* * cycle through all N_DRIVE floppy drives, for disk change testing. * stopping at current drive. This is done before any long operation, to * be sure to have up to date disk change information. */ static void scandrives(void) { int i, drive, saved_drive; if (DP->select_delay) return; saved_drive = current_drive; for (i=0; i < N_DRIVE; i++){ drive = (saved_drive + i + 1) % N_DRIVE; if (UDRS->fd_ref == 0 || UDP->select_delay != 0) continue; /* skip closed drives */ set_fdc(drive); if (!(set_dor(fdc, ~3, UNIT(drive) | (0x10 << UNIT(drive))) & (0x10 << UNIT(drive)))) /* switch the motor off again, if it was off to * begin with */ set_dor(fdc, ~(0x10 << UNIT(drive)), 0); } set_fdc(saved_drive); } static void empty(void) { } static struct tq_struct floppy_tq = { 0, 0, 0, 0 }; static struct timer_list fd_timer ={ NULL, NULL, 0, 0, 0 }; static void cancel_activity(void) { CLEAR_INTR; floppy_tq.routine = (void *)(void *) empty; del_timer(&fd_timer); } /* this function makes sure that the disk stays in the drive during the * transfer */ static void fd_watchdog(void) { #ifdef DCL_DEBUG if (DP->flags & FD_DEBUG){ DPRINT("calling disk change from watchdog\n"); } #endif if (disk_change(current_drive)){ DPRINT("disk removed during i/o\n"); cancel_activity(); cont->done(0); reset_fdc(); } else { del_timer(&fd_timer); fd_timer.function = (timeout_fn) fd_watchdog; fd_timer.expires = jiffies + HZ / 10; add_timer(&fd_timer); } } static void main_command_interrupt(void) { del_timer(&fd_timer); cont->interrupt(); } /* waits for a delay (spinup or select) to pass */ static int wait_for_completion(unsigned long delay, timeout_fn function) { if (FDCS->reset){ reset_fdc(); /* do the reset during sleep to win time * if we don't need to sleep, it's a good * occasion anyways */ return 1; } if ((signed) (jiffies - delay) < 0){ del_timer(&fd_timer); fd_timer.function = function; fd_timer.expires = delay; add_timer(&fd_timer); return 1; } return 0; } static int hlt_disabled=0; static void floppy_disable_hlt(void) { unsigned long flags; INT_OFF; if (!hlt_disabled){ hlt_disabled=1; #ifdef HAVE_DISABLE_HLT disable_hlt(); #endif } INT_ON; } static void floppy_enable_hlt(void) { unsigned long flags; INT_OFF; if (hlt_disabled){ hlt_disabled=0; #ifdef HAVE_DISABLE_HLT enable_hlt(); #endif } INT_ON; } static void setup_DMA(void) { unsigned long flags; #ifdef FLOPPY_SANITY_CHECK if (raw_cmd->length == 0){ int i; printk("zero dma transfer size:"); for (i=0; i < raw_cmd->cmd_count; i++) printk("%x,", raw_cmd->cmd[i]); printk("\n"); cont->done(0); FDCS->reset = 1; return; } if ((long) raw_cmd->kernel_data % 512){ printk("non aligned address: %p\n", raw_cmd->kernel_data); cont->done(0); FDCS->reset=1; return; } if (CROSS_64KB(raw_cmd->kernel_data, raw_cmd->length)) { printk("DMA crossing 64-K boundary %p-%p\n", raw_cmd->kernel_data, raw_cmd->kernel_data + raw_cmd->length); cont->done(0); FDCS->reset=1; return; } #endif INT_OFF; fd_disable_dma(); fd_clear_dma_ff(); fd_cacheflush(raw_cmd->kernel_data, raw_cmd->length); fd_set_dma_mode((raw_cmd->flags & FD_RAW_READ)? DMA_MODE_READ : DMA_MODE_WRITE); fd_set_dma_addr(virt_to_bus(raw_cmd->kernel_data)); fd_set_dma_count(raw_cmd->length); virtual_dma_port = FDCS->address; fd_enable_dma(); INT_ON; floppy_disable_hlt(); } void show_floppy(void); /* waits until the fdc becomes ready */ static int wait_til_ready(void) { int counter, status; if(FDCS->reset) return -1; for (counter = 0; counter < 10000; counter++) { status = fd_inb(FD_STATUS); if (status & STATUS_READY) return status; } if (!initialising) { DPRINT("Getstatus times out (%x) on fdc %d\n", status, fdc); show_floppy(); } FDCS->reset = 1; return -1; } /* sends a command byte to the fdc */ static int output_byte(char byte) { int status; if ((status = wait_til_ready()) < 0) return -1; if ((status & (STATUS_READY|STATUS_DIR|STATUS_DMA)) == STATUS_READY){ fd_outb(byte,FD_DATA); #ifdef FLOPPY_SANITY_CHECK output_log[output_log_pos].data = byte; output_log[output_log_pos].status = status; output_log[output_log_pos].jiffies = jiffies; output_log_pos = (output_log_pos + 1) % OLOGSIZE; #endif return 0; } FDCS->reset = 1; if (!initialising) { DPRINT("Unable to send byte %x to FDC. Fdc=%x Status=%x\n", byte, fdc, status); show_floppy(); } return -1; } #define LAST_OUT(x) if (output_byte(x)<0){ reset_fdc();return;} /* gets the response from the fdc */ static int result(void) { int i, status; for(i=0; i < MAX_REPLIES; i++) { if ((status = wait_til_ready()) < 0) break; status &= STATUS_DIR|STATUS_READY|STATUS_BUSY|STATUS_DMA; if ((status & ~STATUS_BUSY) == STATUS_READY){ #ifdef FLOPPY_SANITY_CHECK resultjiffies = jiffies; resultsize = i; #endif return i; } if (status == (STATUS_DIR|STATUS_READY|STATUS_BUSY)) reply_buffer[i] = fd_inb(FD_DATA); else break; } if(!initialising) { DPRINT("get result error. Fdc=%d Last status=%x Read bytes=%d\n", fdc, status, i); show_floppy(); } FDCS->reset = 1; return -1; } #define MORE_OUTPUT -2 /* does the fdc need more output? */ static int need_more_output(void) { int status; if( (status = wait_til_ready()) < 0) return -1; if ((status & (STATUS_READY|STATUS_DIR|STATUS_DMA)) == STATUS_READY) return MORE_OUTPUT; return result(); } /* Set perpendicular mode as required, based on data rate, if supported. * 82077 Now tested. 1Mbps data rate only possible with 82077-1. */ static inline void perpendicular_mode(void) { unsigned char perp_mode; if (raw_cmd->rate & 0x40){ switch(raw_cmd->rate & 3){ case 0: perp_mode=2; break; case 3: perp_mode=3; break; default: DPRINT("Invalid data rate for perpendicular mode!\n"); cont->done(0); FDCS->reset = 1; /* convenient way to return to * redo without to much hassle (deep * stack et al. */ return; } } else perp_mode = 0; if (FDCS->perp_mode == perp_mode) return; if (FDCS->version >= FDC_82077_ORIG) { output_byte(FD_PERPENDICULAR); output_byte(perp_mode); FDCS->perp_mode = perp_mode; } else if (perp_mode) { DPRINT("perpendicular mode not supported by this FDC.\n"); } } /* perpendicular_mode */ static int fifo_depth = 0xa; static int no_fifo = 0; static int fdc_configure(void) { /* Turn on FIFO */ output_byte(FD_CONFIGURE); if(need_more_output() != MORE_OUTPUT) return 0; output_byte(0); output_byte(0x10 | (no_fifo & 0x20) | (fifo_depth & 0xf)); output_byte(0); /* pre-compensation from track 0 upwards */ return 1; } #define NOMINAL_DTR 500 /* Issue a "SPECIFY" command to set the step rate time, head unload time, * head load time, and DMA disable flag to values needed by floppy. * * The value "dtr" is the data transfer rate in Kbps. It is needed * to account for the data rate-based scaling done by the 82072 and 82077 * FDC types. This parameter is ignored for other types of FDCs (i.e. * 8272a). * * Note that changing the data transfer rate has a (probably deleterious) * effect on the parameters subject to scaling for 82072/82077 FDCs, so * fdc_specify is called again after each data transfer rate * change. * * srt: 1000 to 16000 in microseconds * hut: 16 to 240 milliseconds * hlt: 2 to 254 milliseconds * * These values are rounded up to the next highest available delay time. */ static void fdc_specify(void) { unsigned char spec1, spec2; unsigned long srt, hlt, hut; unsigned long dtr = NOMINAL_DTR; unsigned long scale_dtr = NOMINAL_DTR; int hlt_max_code = 0x7f; int hut_max_code = 0xf; if (FDCS->need_configure && FDCS->version >= FDC_82072A) { fdc_configure(); FDCS->need_configure = 0; /*DPRINT("FIFO enabled\n");*/ } switch (raw_cmd->rate & 0x03) { case 3: dtr = 1000; break; case 1: dtr = 300; if (FDCS->version >= FDC_82078) { /* chose the default rate table, not the one * where 1 = 2 Mbps */ output_byte(FD_DRIVESPEC); if(need_more_output() == MORE_OUTPUT) { output_byte(UNIT(current_drive)); output_byte(0xc0); } } break; case 2: dtr = 250; break; } if (FDCS->version >= FDC_82072) { scale_dtr = dtr; hlt_max_code = 0x00; /* 0==256msec*dtr0/dtr (not linear!) */ hut_max_code = 0x0; /* 0==256msec*dtr0/dtr (not linear!) */ } /* Convert step rate from microseconds to milliseconds and 4 bits */ srt = 16 - (DP->srt*scale_dtr/1000 + NOMINAL_DTR - 1)/NOMINAL_DTR; SUPBOUND(srt, 0xf); INFBOUND(srt, 0); hlt = (DP->hlt*scale_dtr/2 + NOMINAL_DTR - 1)/NOMINAL_DTR; if (hlt < 0x01) hlt = 0x01; else if (hlt > 0x7f) hlt = hlt_max_code; hut = (DP->hut*scale_dtr/16 + NOMINAL_DTR - 1)/NOMINAL_DTR; if (hut < 0x1) hut = 0x1; else if (hut > 0xf) hut = hut_max_code; spec1 = (srt << 4) | hut; spec2 = (hlt << 1) | (use_virtual_dma & 1); /* If these parameters did not change, just return with success */ if (FDCS->spec1 != spec1 || FDCS->spec2 != spec2) { /* Go ahead and set spec1 and spec2 */ output_byte(FD_SPECIFY); output_byte(FDCS->spec1 = spec1); output_byte(FDCS->spec2 = spec2); } } /* fdc_specify */ /* Set the FDC's data transfer rate on behalf of the specified drive. * NOTE: with 82072/82077 FDCs, changing the data rate requires a reissue * of the specify command (i.e. using the fdc_specify function). */ static int fdc_dtr(void) { /* If data rate not already set to desired value, set it. */ if ((raw_cmd->rate & 3) == FDCS->dtr) return 0; /* Set dtr */ fd_outb(raw_cmd->rate & 3, FD_DCR); /* TODO: some FDC/drive combinations (C&T 82C711 with TEAC 1.2MB) * need a stabilization period of several milliseconds to be * enforced after data rate changes before R/W operations. * Pause 5 msec to avoid trouble. (Needs to be 2 jiffies) */ FDCS->dtr = raw_cmd->rate & 3; return(wait_for_completion(jiffies+2UL*HZ/100, (timeout_fn) floppy_ready)); } /* fdc_dtr */ static void tell_sector(void) { printk(": track %d, head %d, sector %d, size %d", R_TRACK, R_HEAD, R_SECTOR, R_SIZECODE); } /* tell_sector */ /* * OK, this error interpreting routine is called after a * DMA read/write has succeeded * or failed, so we check the results, and copy any buffers. * hhb: Added better error reporting. * ak: Made this into a separate routine. */ static int interpret_errors(void) { char bad; if (inr!=7) { DPRINT("-- FDC reply error"); FDCS->reset = 1; return 1; } /* check IC to find cause of interrupt */ switch (ST0 & ST0_INTR) { case 0x40: /* error occurred during command execution */ if (ST1 & ST1_EOC) return 0; /* occurs with pseudo-DMA */ bad = 1; if (ST1 & ST1_WP) { DPRINT("Drive is write protected\n"); CLEARF(FD_DISK_WRITABLE); cont->done(0); bad = 2; } else if (ST1 & ST1_ND) { SETF(FD_NEED_TWADDLE); } else if (ST1 & ST1_OR) { if (DP->flags & FTD_MSG) DPRINT("Over/Underrun - retrying\n"); bad = 0; }else if (*errors >= DP->max_errors.reporting){ DPRINT(""); if (ST0 & ST0_ECE) { printk("Recalibrate failed!"); } else if (ST2 & ST2_CRC) { printk("data CRC error"); tell_sector(); } else if (ST1 & ST1_CRC) { printk("CRC error"); tell_sector(); } else if ((ST1 & (ST1_MAM|ST1_ND)) || (ST2 & ST2_MAM)) { if (!probing) { printk("sector not found"); tell_sector(); } else printk("probe failed..."); } else if (ST2 & ST2_WC) { /* seek error */ printk("wrong cylinder"); } else if (ST2 & ST2_BC) { /* cylinder marked as bad */ printk("bad cylinder"); } else { printk("unknown error. ST[0..2] are: 0x%x 0x%x 0x%x", ST0, ST1, ST2); tell_sector(); } printk("\n"); } if (ST2 & ST2_WC || ST2 & ST2_BC) /* wrong cylinder => recal */ DRS->track = NEED_2_RECAL; return bad; case 0x80: /* invalid command given */ DPRINT("Invalid FDC command given!\n"); cont->done(0); return 2; case 0xc0: DPRINT("Abnormal termination caused by polling\n"); cont->error(); return 2; default: /* (0) Normal command termination */ return 0; } } /* * This routine is called when everything should be correctly set up * for the transfer (i.e. floppy motor is on, the correct floppy is * selected, and the head is sitting on the right track). */ static void setup_rw_floppy(void) { int i,r, flags,dflags; unsigned long ready_date; timeout_fn function; flags = raw_cmd->flags; if (flags & (FD_RAW_READ | FD_RAW_WRITE)) flags |= FD_RAW_INTR; if ((flags & FD_RAW_SPIN) && !(flags & FD_RAW_NO_MOTOR)){ ready_date = DRS->spinup_date + DP->spinup; /* If spinup will take a long time, rerun scandrives * again just before spinup completion. Beware that * after scandrives, we must again wait for selection. */ if ((signed) (ready_date - jiffies) > DP->select_delay){ ready_date -= DP->select_delay; function = (timeout_fn) floppy_start; } else function = (timeout_fn) setup_rw_floppy; /* wait until the floppy is spinning fast enough */ if (wait_for_completion(ready_date,function)) return; } dflags = DRS->flags; if ((flags & FD_RAW_READ) || (flags & FD_RAW_WRITE)) setup_DMA(); if (flags & FD_RAW_INTR) SET_INTR(main_command_interrupt); r=0; for (i=0; i< raw_cmd->cmd_count; i++) r|=output_byte(raw_cmd->cmd[i]); #ifdef DEBUGT debugt("rw_command: "); #endif if (r){ cont->error(); reset_fdc(); return; } if (!(flags & FD_RAW_INTR)){ inr = result(); cont->interrupt(); } else if (flags & FD_RAW_NEED_DISK) fd_watchdog(); } static int blind_seek; /* * This is the routine called after every seek (or recalibrate) interrupt * from the floppy controller. */ static void seek_interrupt(void) { #ifdef DEBUGT debugt("seek interrupt:"); #endif if (inr != 2 || (ST0 & 0xF8) != 0x20) { DPRINT("seek failed\n"); DRS->track = NEED_2_RECAL; cont->error(); cont->redo(); return; } if (DRS->track >= 0 && DRS->track != ST1 && !blind_seek){ #ifdef DCL_DEBUG if (DP->flags & FD_DEBUG){ DPRINT("clearing NEWCHANGE flag because of effective seek\n"); DPRINT("jiffies=%lu\n", jiffies); } #endif CLEARF(FD_DISK_NEWCHANGE); /* effective seek */ DRS->select_date = jiffies; } DRS->track = ST1; floppy_ready(); } static void check_wp(void) { if (TESTF(FD_VERIFY)) { /* check write protection */ output_byte(FD_GETSTATUS); output_byte(UNIT(current_drive)); if (result() != 1){ FDCS->reset = 1; return; } CLEARF(FD_VERIFY); CLEARF(FD_NEED_TWADDLE); #ifdef DCL_DEBUG if (DP->flags & FD_DEBUG){ DPRINT("checking whether disk is write protected\n"); DPRINT("wp=%x\n",ST3 & 0x40); } #endif if (!(ST3 & 0x40)) SETF(FD_DISK_WRITABLE); else CLEARF(FD_DISK_WRITABLE); } } static void seek_floppy(void) { int track; blind_seek=0; #ifdef DCL_DEBUG if (DP->flags & FD_DEBUG){ DPRINT("calling disk change from seek\n"); } #endif if (!TESTF(FD_DISK_NEWCHANGE) && disk_change(current_drive) && (raw_cmd->flags & FD_RAW_NEED_DISK)){ /* the media changed flag should be cleared after the seek. * If it isn't, this means that there is really no disk in * the drive. */ SETF(FD_DISK_CHANGED); cont->done(0); cont->redo(); return; } if (DRS->track <= NEED_1_RECAL){ recalibrate_floppy(); return; } else if (TESTF(FD_DISK_NEWCHANGE) && (raw_cmd->flags & FD_RAW_NEED_DISK) && (DRS->track <= NO_TRACK || DRS->track == raw_cmd->track)) { /* we seek to clear the media-changed condition. Does anybody * know a more elegant way, which works on all drives? */ if (raw_cmd->track) track = raw_cmd->track - 1; else { if (DP->flags & FD_SILENT_DCL_CLEAR){ set_dor(fdc, ~(0x10 << UNIT(current_drive)), 0); blind_seek = 1; raw_cmd->flags |= FD_RAW_NEED_SEEK; } track = 1; } } else { check_wp(); if (raw_cmd->track != DRS->track && (raw_cmd->flags & FD_RAW_NEED_SEEK)) track = raw_cmd->track; else { setup_rw_floppy(); return; } } SET_INTR(seek_interrupt); output_byte(FD_SEEK); output_byte(UNIT(current_drive)); LAST_OUT(track); #ifdef DEBUGT debugt("seek command:"); #endif } static void recal_interrupt(void) { #ifdef DEBUGT debugt("recal interrupt:"); #endif if (inr !=2) FDCS->reset = 1; else if (ST0 & ST0_ECE) { switch(DRS->track){ case NEED_1_RECAL: #ifdef DEBUGT debugt("recal interrupt need 1 recal:"); #endif /* after a second recalibrate, we still haven't * reached track 0. Probably no drive. Raise an * error, as failing immediately might upset * computers possessed by the Devil :-) */ cont->error(); cont->redo(); return; case NEED_2_RECAL: #ifdef DEBUGT debugt("recal interrupt need 2 recal:"); #endif /* If we already did a recalibrate, * and we are not at track 0, this * means we have moved. (The only way * not to move at recalibration is to * be already at track 0.) Clear the * new change flag */ #ifdef DCL_DEBUG if (DP->flags & FD_DEBUG){ DPRINT("clearing NEWCHANGE flag because of second recalibrate\n"); } #endif CLEARF(FD_DISK_NEWCHANGE); DRS->select_date = jiffies; /* fall through */ default: #ifdef DEBUGT debugt("recal interrupt default:"); #endif /* Recalibrate moves the head by at * most 80 steps. If after one * recalibrate we don't have reached * track 0, this might mean that we * started beyond track 80. Try * again. */ DRS->track = NEED_1_RECAL; break; } } else DRS->track = ST1; floppy_ready(); } static void print_result(char *message, int inr) { int i; DPRINT("%s ", message); if (inr >= 0) for (i=0; i<inr; i++) printk("repl[%d]=%x ", i, reply_buffer[i]); printk("\n"); } /* interrupt handler */ void floppy_interrupt(int irq, void *dev_id, struct pt_regs * regs) { void (*handler)(void) = DEVICE_INTR; int do_print; lasthandler = handler; interruptjiffies = jiffies; fd_disable_dma(); floppy_enable_hlt(); CLEAR_INTR; if (fdc >= N_FDC || FDCS->address == -1){ /* we don't even know which FDC is the culprit */ printk("DOR0=%x\n", fdc_state[0].dor); printk("floppy interrupt on bizarre fdc %d\n",fdc); printk("handler=%p\n", handler); is_alive("bizarre fdc"); return; } FDCS->reset = 0; /* We have to clear the reset flag here, because apparently on boxes * with level triggered interrupts (PS/2, Sparc, ...), it is needed to * emit SENSEI's to clear the interrupt line. And FDCS->reset blocks the * emission of the SENSEI's. * It is OK to emit floppy commands because we are in an interrupt * handler here, and thus we have to fear no interference of other * activity. */ do_print = !handler && print_unex && !initialising; inr = result(); if(do_print) print_result("unexpected interrupt", inr); if (inr == 0){ int max_sensei = 4; do { output_byte(FD_SENSEI); inr = result(); if(do_print) print_result("sensei", inr); max_sensei--; } while ((ST0 & 0x83) != UNIT(current_drive) && inr == 2 && max_sensei); } if (handler) { if(intr_count >= 2) { /* expected interrupt */ floppy_tq.routine = (void *)(void *) handler; queue_task_irq(&floppy_tq, &tq_immediate); mark_bh(IMMEDIATE_BH); } else handler(); } else FDCS->reset = 1; is_alive("normal interrupt end"); } static void recalibrate_floppy(void) { #ifdef DEBUGT debugt("recalibrate floppy:"); #endif SET_INTR(recal_interrupt); output_byte(FD_RECALIBRATE); LAST_OUT(UNIT(current_drive)); } /* * Must do 4 FD_SENSEIs after reset because of ``drive polling''. */ static void reset_interrupt(void) { #ifdef DEBUGT debugt("reset interrupt:"); #endif result(); /* get the status ready for set_fdc */ if (FDCS->reset) { printk("reset set in interrupt, calling %p\n", cont->error); cont->error(); /* a reset just after a reset. BAD! */ } cont->redo(); } /* * reset is done by pulling bit 2 of DOR low for a while (old FDCs), * or by setting the self clearing bit 7 of STATUS (newer FDCs) */ static void reset_fdc(void) { SET_INTR(reset_interrupt); FDCS->reset = 0; reset_fdc_info(0); /* Pseudo-DMA may intercept 'reset finished' interrupt. */ /* Irrelevant for systems with true DMA (i386). */ fd_disable_dma(); if (FDCS->version >= FDC_82072A) fd_outb(0x80 | (FDCS->dtr &3), FD_STATUS); else { fd_outb(FDCS->dor & ~0x04, FD_DOR); udelay(FD_RESET_DELAY); fd_outb(FDCS->dor, FD_DOR); } } void show_floppy(void) { int i; printk("\n"); printk("floppy driver state\n"); printk("-------------------\n"); printk("now=%lu last interrupt=%lu diff=%lu last called handler=%p\n", jiffies, interruptjiffies, jiffies-interruptjiffies, lasthandler); #ifdef FLOPPY_SANITY_CHECK printk("timeout_message=%s\n", timeout_message); printk("last output bytes:\n"); for (i=0; i < OLOGSIZE; i++) printk("%2x %2x %lu\n", output_log[(i+output_log_pos) % OLOGSIZE].data, output_log[(i+output_log_pos) % OLOGSIZE].status, output_log[(i+output_log_pos) % OLOGSIZE].jiffies); printk("last result at %lu\n", resultjiffies); printk("last redo_fd_request at %lu\n", lastredo); for (i=0; i<resultsize; i++){ printk("%2x ", reply_buffer[i]); } printk("\n"); #endif printk("status=%x\n", fd_inb(FD_STATUS)); printk("fdc_busy=%d\n", fdc_busy); if (DEVICE_INTR) printk("DEVICE_INTR=%p\n", DEVICE_INTR); if (floppy_tq.sync) printk("floppy_tq.routine=%p\n", floppy_tq.routine); if (fd_timer.prev) printk("fd_timer.function=%p\n", fd_timer.function); if (fd_timeout.prev){ printk("timer_table=%p\n",fd_timeout.function); printk("expires=%lu\n",fd_timeout.expires-jiffies); printk("now=%lu\n",jiffies); } printk("cont=%p\n", cont); printk("CURRENT=%p\n", CURRENT); printk("command_status=%d\n", command_status); printk("\n"); } static void floppy_shutdown(void) { if (!initialising) show_floppy(); cancel_activity(); sti(); floppy_enable_hlt(); fd_disable_dma(); /* avoid dma going to a random drive after shutdown */ if (!initialising) DPRINT("floppy timeout called\n"); FDCS->reset = 1; if (cont){ cont->done(0); cont->redo(); /* this will recall reset when needed */ } else { printk("no cont in shutdown!\n"); process_fd_request(); } is_alive("floppy shutdown"); } /*typedef void (*timeout_fn)(unsigned long);*/ /* start motor, check media-changed condition and write protection */ static int start_motor(void (*function)(void) ) { int mask, data; mask = 0xfc; data = UNIT(current_drive); if (!(raw_cmd->flags & FD_RAW_NO_MOTOR)){ if (!(FDCS->dor & (0x10 << UNIT(current_drive)))){ set_debugt(); /* no read since this drive is running */ DRS->first_read_date = 0; /* note motor start time if motor is not yet running */ DRS->spinup_date = jiffies; data |= (0x10 << UNIT(current_drive)); } } else if (FDCS->dor & (0x10 << UNIT(current_drive))) mask &= ~(0x10 << UNIT(current_drive)); /* starts motor and selects floppy */ del_timer(motor_off_timer + current_drive); set_dor(fdc, mask, data); /* wait_for_completion also schedules reset if needed. */ return(wait_for_completion(DRS->select_date+DP->select_delay, (timeout_fn) function)); } static void floppy_ready(void) { CHECK_RESET; if (start_motor(floppy_ready)) return; if (fdc_dtr()) return; #ifdef DCL_DEBUG if (DP->flags & FD_DEBUG){ DPRINT("calling disk change from floppy_ready\n"); } #endif if (!(raw_cmd->flags & FD_RAW_NO_MOTOR) && disk_change(current_drive) && !DP->select_delay) twaddle(); /* this clears the dcl on certain drive/controller * combinations */ if (raw_cmd->flags & (FD_RAW_NEED_SEEK | FD_RAW_NEED_DISK)){ perpendicular_mode(); fdc_specify(); /* must be done here because of hut, hlt ... */ seek_floppy(); } else setup_rw_floppy(); } static void floppy_start(void) { reschedule_timeout(CURRENTD, "floppy start", 0); scandrives(); #ifdef DCL_DEBUG if (DP->flags & FD_DEBUG){ DPRINT("setting NEWCHANGE in floppy_start\n"); } #endif SETF(FD_DISK_NEWCHANGE); floppy_ready(); } /* * ======================================================================== * here ends the bottom half. Exported routines are: * floppy_start, floppy_off, floppy_ready, lock_fdc, unlock_fdc, set_fdc, * start_motor, reset_fdc, reset_fdc_info, interpret_errors. * Initialization also uses output_byte, result, set_dor, floppy_interrupt * and set_dor. * ======================================================================== */ /* * General purpose continuations. * ============================== */ static void do_wakeup(void) { reschedule_timeout(MAXTIMEOUT, "do wakeup", 0); cont = 0; command_status += 2; wake_up(&command_done); } static struct cont_t wakeup_cont={ empty, do_wakeup, empty, (done_f)empty }; static struct cont_t intr_cont={ empty, process_fd_request, empty, (done_f) empty }; static int wait_til_done(void (*handler)(void), int interruptible) { int ret; unsigned long flags; floppy_tq.routine = (void *)(void *) handler; queue_task(&floppy_tq, &tq_immediate); mark_bh(IMMEDIATE_BH); INT_OFF; while(command_status < 2 && NO_SIGNAL){ is_alive("wait_til_done"); if (interruptible) interruptible_sleep_on(&command_done); else sleep_on(&command_done); } if (command_status < 2){ cancel_activity(); cont = &intr_cont; reset_fdc(); INT_ON; return -EINTR; } INT_ON; if (FDCS->reset) command_status = FD_COMMAND_ERROR; if (command_status == FD_COMMAND_OKAY) ret=0; else ret=-EIO; command_status = FD_COMMAND_NONE; return ret; } static void generic_done(int result) { command_status = result; cont = &wakeup_cont; } static void generic_success(void) { cont->done(1); } static void generic_failure(void) { cont->done(0); } static void success_and_wakeup(void) { generic_success(); cont->redo(); } /* * formatting and rw support. * ========================== */ static int next_valid_format(void) { int probed_format; probed_format = DRS->probed_format; while(1){ if (probed_format >= 8 || !DP->autodetect[probed_format]){ DRS->probed_format = 0; return 1; } if (floppy_type[DP->autodetect[probed_format]].sect){ DRS->probed_format = probed_format; return 0; } probed_format++; } } static void bad_flp_intr(void) { if (probing){ DRS->probed_format++; if (!next_valid_format()) return; } (*errors)++; INFBOUND(DRWE->badness, *errors); if (*errors > DP->max_errors.abort) cont->done(0); if (*errors > DP->max_errors.reset) FDCS->reset = 1; else if (*errors > DP->max_errors.recal) DRS->track = NEED_2_RECAL; } static void set_floppy(kdev_t device) { if (TYPE(device)) _floppy = TYPE(device) + floppy_type; else _floppy = current_type[ DRIVE(device) ]; } /* * formatting support. * =================== */ static void format_interrupt(void) { switch (interpret_errors()){ case 1: cont->error(); case 2: break; case 0: cont->done(1); } cont->redo(); } #define CODE2SIZE (ssize = ((1 << SIZECODE) + 3) >> 2) #define FM_MODE(x,y) ((y) & ~(((x)->rate & 0x80) >>1)) #define CT(x) ((x) | 0xc0) static void setup_format_params(int track) { struct fparm { unsigned char track,head,sect,size; } *here = (struct fparm *)floppy_track_buffer; int il,n; int count,head_shift,track_shift; raw_cmd = &default_raw_cmd; raw_cmd->track = track; raw_cmd->flags = FD_RAW_WRITE | FD_RAW_INTR | FD_RAW_SPIN | FD_RAW_NEED_DISK | FD_RAW_NEED_SEEK; raw_cmd->rate = _floppy->rate & 0x43; raw_cmd->cmd_count = NR_F; COMMAND = FM_MODE(_floppy,FD_FORMAT); DR_SELECT = UNIT(current_drive) + PH_HEAD(_floppy,format_req.head); F_SIZECODE = FD_SIZECODE(_floppy); F_SECT_PER_TRACK = _floppy->sect << 2 >> F_SIZECODE; F_GAP = _floppy->fmt_gap; F_FILL = FD_FILL_BYTE; raw_cmd->kernel_data = floppy_track_buffer; raw_cmd->length = 4 * F_SECT_PER_TRACK; /* allow for about 30ms for data transport per track */ head_shift = (F_SECT_PER_TRACK + 5) / 6; /* a ``cylinder'' is two tracks plus a little stepping time */ track_shift = 2 * head_shift + 3; /* position of logical sector 1 on this track */ n = (track_shift * format_req.track + head_shift * format_req.head) % F_SECT_PER_TRACK; /* determine interleave */ il = 1; if (_floppy->fmt_gap < 0x22) il++; /* initialize field */ for (count = 0; count < F_SECT_PER_TRACK; ++count) { here[count].track = format_req.track; here[count].head = format_req.head; here[count].sect = 0; here[count].size = F_SIZECODE; } /* place logical sectors */ for (count = 1; count <= F_SECT_PER_TRACK; ++count) { here[n].sect = count; n = (n+il) % F_SECT_PER_TRACK; if (here[n].sect) { /* sector busy, find next free sector */ ++n; if (n>= F_SECT_PER_TRACK) { n-=F_SECT_PER_TRACK; while (here[n].sect) ++n; } } } } static void redo_format(void) { buffer_track = -1; setup_format_params(format_req.track << STRETCH(_floppy)); floppy_start(); #ifdef DEBUGT debugt("queue format request"); #endif } static struct cont_t format_cont={ format_interrupt, redo_format, bad_flp_intr, generic_done }; static int do_format(kdev_t device, struct format_descr *tmp_format_req) { int ret; int drive=DRIVE(device); LOCK_FDC(drive,1); set_floppy(device); if (!_floppy || _floppy->track > DP->tracks || tmp_format_req->track >= _floppy->track || tmp_format_req->head >= _floppy->head || (_floppy->sect << 2) % (1 << FD_SIZECODE(_floppy)) || !_floppy->fmt_gap) { process_fd_request(); return -EINVAL; } format_req = *tmp_format_req; format_errors = 0; cont = &format_cont; errors = &format_errors; IWAIT(redo_format); process_fd_request(); return ret; } /* * Buffer read/write and support * ============================= */ /* new request_done. Can handle physical sectors which are smaller than a * logical buffer */ static void request_done(int uptodate) { int block; probing = 0; reschedule_timeout(MAXTIMEOUT, "request done %d", uptodate); if (!CURRENT){ DPRINT("request list destroyed in floppy request done\n"); return; } if (uptodate){ /* maintain values for invalidation on geometry * change */ block = current_count_sectors + CURRENT->sector; INFBOUND(DRS->maxblock, block); if (block > _floppy->sect) DRS->maxtrack = 1; /* unlock chained buffers */ while (current_count_sectors && CURRENT && current_count_sectors >= CURRENT->current_nr_sectors){ current_count_sectors -= CURRENT->current_nr_sectors; CURRENT->nr_sectors -= CURRENT->current_nr_sectors; CURRENT->sector += CURRENT->current_nr_sectors; end_request(1); } if (current_count_sectors && CURRENT){ /* "unlock" last subsector */ CURRENT->buffer += current_count_sectors <<9; CURRENT->current_nr_sectors -= current_count_sectors; CURRENT->nr_sectors -= current_count_sectors; CURRENT->sector += current_count_sectors; return; } if (current_count_sectors && !CURRENT) DPRINT("request list destroyed in floppy request done\n"); } else { if (CURRENT->cmd == WRITE) { /* record write error information */ DRWE->write_errors++; if (DRWE->write_errors == 1) { DRWE->first_error_sector = CURRENT->sector; DRWE->first_error_generation = DRS->generation; } DRWE->last_error_sector = CURRENT->sector; DRWE->last_error_generation = DRS->generation; } end_request(0); } } /* Interrupt handler evaluating the result of the r/w operation */ static void rw_interrupt(void) { int nr_sectors, ssize, eoc, heads; if (!DRS->first_read_date) DRS->first_read_date = jiffies; nr_sectors = 0; CODE2SIZE; if(ST1 & ST1_EOC) eoc = 1; else eoc = 0; if(COMMAND & 0x80) heads = 2; else heads = 1; nr_sectors = (((R_TRACK-TRACK) * heads + R_HEAD-HEAD) * SECT_PER_TRACK + R_SECTOR-SECTOR + eoc) << SIZECODE >> 2; #ifdef FLOPPY_SANITY_CHECK if (nr_sectors / ssize > (in_sector_offset + current_count_sectors + ssize - 1)/ssize) { DPRINT("long rw: %x instead of %lx\n", nr_sectors, current_count_sectors); printk("rs=%d s=%d\n", R_SECTOR, SECTOR); printk("rh=%d h=%d\n", R_HEAD, HEAD); printk("rt=%d t=%d\n", R_TRACK, TRACK); printk("heads=%d eoc=%d\n", heads, eoc); printk("spt=%d st=%d ss=%d\n", SECT_PER_TRACK, sector_t, ssize); printk("in_sector_offset=%d\n", in_sector_offset); } #endif nr_sectors -= in_sector_offset; INFBOUND(nr_sectors,0); SUPBOUND(current_count_sectors, nr_sectors); switch (interpret_errors()){ case 2: cont->redo(); return; case 1: if (!current_count_sectors){ cont->error(); cont->redo(); return; } break; case 0: if (!current_count_sectors){ cont->redo(); return; } current_type[current_drive] = _floppy; floppy_sizes[TOMINOR(current_drive) ]= _floppy->size>>1; break; } if (probing) { if (DP->flags & FTD_MSG) DPRINT("Auto-detected floppy type %s in fd%d\n", _floppy->name,current_drive); current_type[current_drive] = _floppy; floppy_sizes[TOMINOR(current_drive)] = _floppy->size >> 1; probing = 0; } if (CT(COMMAND) != FD_READ || raw_cmd->kernel_data == CURRENT->buffer){ /* transfer directly from buffer */ cont->done(1); } else if (CT(COMMAND) == FD_READ){ buffer_track = raw_cmd->track; buffer_drive = current_drive; INFBOUND(buffer_max, nr_sectors + sector_t); } cont->redo(); } /* Compute maximal contiguous buffer size. */ static int buffer_chain_size(void) { struct buffer_head *bh; int size; char *base; base = CURRENT->buffer; size = CURRENT->current_nr_sectors << 9; bh = CURRENT->bh; if (bh){ bh = bh->b_reqnext; while (bh && bh->b_data == base + size){ size += bh->b_size; bh = bh->b_reqnext; } } return size >> 9; } /* Compute the maximal transfer size */ static int transfer_size(int ssize, int max_sector, int max_size) { SUPBOUND(max_sector, sector_t + max_size); /* alignment */ max_sector -= (max_sector % _floppy->sect) % ssize; /* transfer size, beginning not aligned */ current_count_sectors = max_sector - sector_t ; return max_sector; } /* * Move data from/to the track buffer to/from the buffer cache. */ static void copy_buffer(int ssize, int max_sector, int max_sector_2) { int remaining; /* number of transferred 512-byte sectors */ struct buffer_head *bh; char *buffer, *dma_buffer; int size; max_sector = transfer_size(ssize, minimum(max_sector, max_sector_2), CURRENT->nr_sectors); if (current_count_sectors <= 0 && CT(COMMAND) == FD_WRITE && buffer_max > sector_t + CURRENT->nr_sectors) current_count_sectors = minimum(buffer_max - sector_t, CURRENT->nr_sectors); remaining = current_count_sectors << 9; #ifdef FLOPPY_SANITY_CHECK if ((remaining >> 9) > CURRENT->nr_sectors && CT(COMMAND) == FD_WRITE){ DPRINT("in copy buffer\n"); printk("current_count_sectors=%ld\n", current_count_sectors); printk("remaining=%d\n", remaining >> 9); printk("CURRENT->nr_sectors=%ld\n",CURRENT->nr_sectors); printk("CURRENT->current_nr_sectors=%ld\n", CURRENT->current_nr_sectors); printk("max_sector=%d\n", max_sector); printk("ssize=%d\n", ssize); } #endif buffer_max = maximum(max_sector, buffer_max); dma_buffer = floppy_track_buffer + ((sector_t - buffer_min) << 9); bh = CURRENT->bh; size = CURRENT->current_nr_sectors << 9; buffer = CURRENT->buffer; while (remaining > 0){ SUPBOUND(size, remaining); #ifdef FLOPPY_SANITY_CHECK if (dma_buffer + size > floppy_track_buffer + (max_buffer_sectors << 10) || dma_buffer < floppy_track_buffer){ DPRINT("buffer overrun in copy buffer %d\n", (int) ((floppy_track_buffer - dma_buffer) >>9)); printk("sector_t=%d buffer_min=%d\n", sector_t, buffer_min); printk("current_count_sectors=%ld\n", current_count_sectors); if (CT(COMMAND) == FD_READ) printk("read\n"); if (CT(COMMAND) == FD_READ) printk("write\n"); break; } if (((unsigned long)buffer) % 512) DPRINT("%p buffer not aligned\n", buffer); #endif if (CT(COMMAND) == FD_READ) memcpy(buffer, dma_buffer, size); else memcpy(dma_buffer, buffer, size); remaining -= size; if (!remaining) break; dma_buffer += size; bh = bh->b_reqnext; #ifdef FLOPPY_SANITY_CHECK if (!bh){ DPRINT("bh=null in copy buffer after copy\n"); break; } #endif size = bh->b_size; buffer = bh->b_data; } #ifdef FLOPPY_SANITY_CHECK if (remaining){ if (remaining > 0) max_sector -= remaining >> 9; DPRINT("weirdness: remaining %d\n", remaining>>9); } #endif } /* work around a bug in pseudo DMA * (on some FDCs) pseudo DMA does not stop when the CPU stops * sending data. Hence we need a different way to signal the * transfer length: We use SECT_PER_TRACK. Unfortunately, this * does not work with MT, hence we can only transfer one head at * a time */ static void virtualdmabug_workaround(void) { int hard_sectors, end_sector; if(CT(COMMAND) == FD_WRITE) { COMMAND &= ~0x80; /* switch off multiple track mode */ hard_sectors = raw_cmd->length >> (7 + SIZECODE); end_sector = SECTOR + hard_sectors - 1; #ifdef FLOPPY_SANITY_CHECK if(end_sector > SECT_PER_TRACK) { printk("too many sectors %d > %d\n", end_sector, SECT_PER_TRACK); return; } #endif SECT_PER_TRACK = end_sector; /* make sure SECT_PER_TRACK points * to end of transfer */ } } /* * Formulate a read/write request. * this routine decides where to load the data (directly to buffer, or to * tmp floppy area), how much data to load (the size of the buffer, the whole * track, or a single sector) * All floppy_track_buffer handling goes in here. If we ever add track buffer * allocation on the fly, it should be done here. No other part should need * modification. */ static int make_raw_rw_request(void) { int aligned_sector_t; int max_sector, max_size, tracksize, ssize; set_fdc(DRIVE(CURRENT->rq_dev)); raw_cmd = &default_raw_cmd; raw_cmd->flags = FD_RAW_SPIN | FD_RAW_NEED_DISK | FD_RAW_NEED_DISK | FD_RAW_NEED_SEEK; raw_cmd->cmd_count = NR_RW; if (CURRENT->cmd == READ){ raw_cmd->flags |= FD_RAW_READ; COMMAND = FM_MODE(_floppy,FD_READ); } else if (CURRENT->cmd == WRITE){ raw_cmd->flags |= FD_RAW_WRITE; COMMAND = FM_MODE(_floppy,FD_WRITE); } else { DPRINT("make_raw_rw_request: unknown command\n"); return 0; } max_sector = _floppy->sect * _floppy->head; TRACK = CURRENT->sector / max_sector; sector_t = CURRENT->sector % max_sector; if (_floppy->track && TRACK >= _floppy->track) return 0; HEAD = sector_t / _floppy->sect; if (((_floppy->stretch & FD_SWAPSIDES) || TESTF(FD_NEED_TWADDLE)) && sector_t < _floppy->sect) max_sector = _floppy->sect; /* 2M disks have phantom sectors on the first track */ if ((_floppy->rate & FD_2M) && (!TRACK) && (!HEAD)){ max_sector = 2 * _floppy->sect / 3; if (sector_t >= max_sector){ current_count_sectors = minimum(_floppy->sect - sector_t, CURRENT->nr_sectors); return 1; } SIZECODE = 2; } else SIZECODE = FD_SIZECODE(_floppy); raw_cmd->rate = _floppy->rate & 0x43; if ((_floppy->rate & FD_2M) && (TRACK || HEAD) && raw_cmd->rate == 2) raw_cmd->rate = 1; if (SIZECODE) SIZECODE2 = 0xff; else SIZECODE2 = 0x80; raw_cmd->track = TRACK << STRETCH(_floppy); DR_SELECT = UNIT(current_drive) + PH_HEAD(_floppy,HEAD); GAP = _floppy->gap; CODE2SIZE; SECT_PER_TRACK = _floppy->sect << 2 >> SIZECODE; SECTOR = ((sector_t % _floppy->sect) << 2 >> SIZECODE) + 1; /* tracksize describes the size which can be filled up with sectors * of size ssize. */ tracksize = _floppy->sect - _floppy->sect % ssize; if (tracksize < _floppy->sect){ SECT_PER_TRACK ++; if (tracksize <= sector_t % _floppy->sect) SECTOR--; /* if we are beyond tracksize, fill up using smaller sectors */ while (tracksize <= sector_t % _floppy->sect){ while(tracksize + ssize > _floppy->sect){ SIZECODE--; ssize >>= 1; } SECTOR++; SECT_PER_TRACK ++; tracksize += ssize; } max_sector = HEAD * _floppy->sect + tracksize; } else if (!TRACK && !HEAD && !(_floppy->rate & FD_2M) && probing) { max_sector = _floppy->sect; } else if (!HEAD && CT(COMMAND) == FD_WRITE) { /* for virtual DMA bug workaround */ max_sector = _floppy->sect; } in_sector_offset = (sector_t % _floppy->sect) % ssize; aligned_sector_t = sector_t - in_sector_offset; max_size = CURRENT->nr_sectors; if ((raw_cmd->track == buffer_track) && (current_drive == buffer_drive) && (sector_t >= buffer_min) && (sector_t < buffer_max)) { /* data already in track buffer */ if (CT(COMMAND) == FD_READ) { copy_buffer(1, max_sector, buffer_max); return 1; } } else if (in_sector_offset || CURRENT->nr_sectors < ssize){ if (CT(COMMAND) == FD_WRITE){ if (sector_t + CURRENT->nr_sectors > ssize && sector_t + CURRENT->nr_sectors < ssize + ssize) max_size = ssize + ssize; else max_size = ssize; } raw_cmd->flags &= ~FD_RAW_WRITE; raw_cmd->flags |= FD_RAW_READ; COMMAND = FM_MODE(_floppy,FD_READ); } else if ((unsigned long)CURRENT->buffer < MAX_DMA_ADDRESS) { unsigned long dma_limit; int direct, indirect; indirect= transfer_size(ssize,max_sector,max_buffer_sectors*2) - sector_t; /* * Do NOT use minimum() here---MAX_DMA_ADDRESS is 64 bits wide * on a 64 bit machine! */ max_size = buffer_chain_size(); dma_limit = (MAX_DMA_ADDRESS - ((unsigned long) CURRENT->buffer)) >> 9; if ((unsigned long) max_size > dma_limit) { max_size = dma_limit; } /* 64 kb boundaries */ if (CROSS_64KB(CURRENT->buffer, max_size << 9)) max_size = (K_64 - ((long) CURRENT->buffer) % K_64)>>9; direct = transfer_size(ssize,max_sector,max_size) - sector_t; /* * We try to read tracks, but if we get too many errors, we * go back to reading just one sector at a time. * * This means we should be able to read a sector even if there * are other bad sectors on this track. */ if (!direct || (indirect * 2 > direct * 3 && *errors < DP->max_errors.read_track && /*!TESTF(FD_NEED_TWADDLE) &&*/ ((!probing || (DP->read_track&(1<<DRS->probed_format)))))){ max_size = CURRENT->nr_sectors; } else { raw_cmd->kernel_data = CURRENT->buffer; raw_cmd->length = current_count_sectors << 9; if (raw_cmd->length == 0){ DPRINT("zero dma transfer attempted from make_raw_request\n"); DPRINT("indirect=%d direct=%d sector_t=%d", indirect, direct, sector_t); return 0; } virtualdmabug_workaround(); return 2; } } if (CT(COMMAND) == FD_READ) max_size = max_sector; /* unbounded */ /* claim buffer track if needed */ if (buffer_track != raw_cmd->track || /* bad track */ buffer_drive !=current_drive || /* bad drive */ sector_t > buffer_max || sector_t < buffer_min || ((CT(COMMAND) == FD_READ || (!in_sector_offset && CURRENT->nr_sectors >= ssize))&& max_sector > 2 * max_buffer_sectors + buffer_min && max_size + sector_t > 2 * max_buffer_sectors + buffer_min) /* not enough space */){ buffer_track = -1; buffer_drive = current_drive; buffer_max = buffer_min = aligned_sector_t; } raw_cmd->kernel_data = floppy_track_buffer + ((aligned_sector_t-buffer_min)<<9); if (CT(COMMAND) == FD_WRITE){ /* copy write buffer to track buffer. * if we get here, we know that the write * is either aligned or the data already in the buffer * (buffer will be overwritten) */ #ifdef FLOPPY_SANITY_CHECK if (in_sector_offset && buffer_track == -1) DPRINT("internal error offset !=0 on write\n"); #endif buffer_track = raw_cmd->track; buffer_drive = current_drive; copy_buffer(ssize, max_sector, 2*max_buffer_sectors+buffer_min); } else transfer_size(ssize, max_sector, 2*max_buffer_sectors+buffer_min-aligned_sector_t); /* round up current_count_sectors to get dma xfer size */ raw_cmd->length = in_sector_offset+current_count_sectors; raw_cmd->length = ((raw_cmd->length -1)|(ssize-1))+1; raw_cmd->length <<= 9; #ifdef FLOPPY_SANITY_CHECK if ((raw_cmd->length < current_count_sectors << 9) || (raw_cmd->kernel_data != CURRENT->buffer && CT(COMMAND) == FD_WRITE && (aligned_sector_t + (raw_cmd->length >> 9) > buffer_max || aligned_sector_t < buffer_min)) || raw_cmd->length % (128 << SIZECODE) || raw_cmd->length <= 0 || current_count_sectors <= 0){ DPRINT("fractionary current count b=%lx s=%lx\n", raw_cmd->length, current_count_sectors); if (raw_cmd->kernel_data != CURRENT->buffer) printk("addr=%d, length=%ld\n", (int) ((raw_cmd->kernel_data - floppy_track_buffer) >> 9), current_count_sectors); printk("st=%d ast=%d mse=%d msi=%d\n", sector_t, aligned_sector_t, max_sector, max_size); printk("ssize=%x SIZECODE=%d\n", ssize, SIZECODE); printk("command=%x SECTOR=%d HEAD=%d, TRACK=%d\n", COMMAND, SECTOR, HEAD, TRACK); printk("buffer drive=%d\n", buffer_drive); printk("buffer track=%d\n", buffer_track); printk("buffer_min=%d\n", buffer_min); printk("buffer_max=%d\n", buffer_max); return 0; } if (raw_cmd->kernel_data != CURRENT->buffer){ if (raw_cmd->kernel_data < floppy_track_buffer || current_count_sectors < 0 || raw_cmd->length < 0 || raw_cmd->kernel_data + raw_cmd->length > floppy_track_buffer + (max_buffer_sectors << 10)){ DPRINT("buffer overrun in schedule dma\n"); printk("sector_t=%d buffer_min=%d current_count=%ld\n", sector_t, buffer_min, raw_cmd->length >> 9); printk("current_count_sectors=%ld\n", current_count_sectors); if (CT(COMMAND) == FD_READ) printk("read\n"); if (CT(COMMAND) == FD_READ) printk("write\n"); return 0; } } else if (raw_cmd->length > CURRENT->nr_sectors << 9 || current_count_sectors > CURRENT->nr_sectors){ DPRINT("buffer overrun in direct transfer\n"); return 0; } else if (raw_cmd->length < current_count_sectors << 9){ DPRINT("more sectors than bytes\n"); printk("bytes=%ld\n", raw_cmd->length >> 9); printk("sectors=%ld\n", current_count_sectors); } if (raw_cmd->length == 0){ DPRINT("zero dma transfer attempted from make_raw_request\n"); return 0; } #endif virtualdmabug_workaround(); return 2; } static void redo_fd_request(void) { #define REPEAT {request_done(0); continue; } kdev_t device; int tmp; lastredo = jiffies; if (current_drive < N_DRIVE) floppy_off(current_drive); if (CURRENT && CURRENT->rq_status == RQ_INACTIVE){ CLEAR_INTR; unlock_fdc(); return; } while(1){ if (!CURRENT) { CLEAR_INTR; unlock_fdc(); return; } if (MAJOR(CURRENT->rq_dev) != MAJOR_NR) panic(DEVICE_NAME ": request list destroyed"); if (CURRENT->bh && !buffer_locked(CURRENT->bh)) panic(DEVICE_NAME ": block not locked"); device = CURRENT->rq_dev; set_fdc(DRIVE(device)); reschedule_timeout(CURRENTD, "redo fd request", 0); set_floppy(device); raw_cmd = & default_raw_cmd; raw_cmd->flags = 0; if (start_motor(redo_fd_request)) return; disk_change(current_drive); if (test_bit(current_drive, &fake_change) || TESTF(FD_DISK_CHANGED)){ DPRINT("disk absent or changed during operation\n"); REPEAT; } if (!_floppy) { /* Autodetection */ if (!probing){ DRS->probed_format = 0; if (next_valid_format()){ DPRINT("no autodetectable formats\n"); _floppy = NULL; REPEAT; } } probing = 1; _floppy = floppy_type+DP->autodetect[DRS->probed_format]; } else probing = 0; errors = & (CURRENT->errors); tmp = make_raw_rw_request(); if (tmp < 2){ request_done(tmp); continue; } if (TESTF(FD_NEED_TWADDLE)) twaddle(); floppy_tq.routine = (void *)(void *) floppy_start; queue_task(&floppy_tq, &tq_immediate); mark_bh(IMMEDIATE_BH); #ifdef DEBUGT debugt("queue fd request"); #endif return; } #undef REPEAT } static struct cont_t rw_cont={ rw_interrupt, redo_fd_request, bad_flp_intr, request_done }; static struct tq_struct request_tq = { 0, 0, (void *) (void *) redo_fd_request, 0 }; static void process_fd_request(void) { cont = &rw_cont; queue_task(&request_tq, &tq_immediate); mark_bh(IMMEDIATE_BH); } static void do_fd_request(void) { sti(); if (fdc_busy){ /* fdc busy, this new request will be treated when the current one is done */ is_alive("do fd request, old request running"); return; } lock_fdc(MAXTIMEOUT,0); process_fd_request(); is_alive("do fd request"); } static struct cont_t poll_cont={ success_and_wakeup, floppy_ready, generic_failure, generic_done }; static int poll_drive(int interruptible, int flag) { int ret; /* no auto-sense, just clear dcl */ raw_cmd = &default_raw_cmd; raw_cmd->flags= flag; raw_cmd->track=0; raw_cmd->cmd_count=0; cont = &poll_cont; #ifdef DCL_DEBUG if (DP->flags & FD_DEBUG){ DPRINT("setting NEWCHANGE in poll_drive\n"); } #endif SETF(FD_DISK_NEWCHANGE); WAIT(floppy_ready); return ret; } /* * User triggered reset * ==================== */ static void reset_intr(void) { printk("weird, reset interrupt called\n"); } static struct cont_t reset_cont={ reset_intr, success_and_wakeup, generic_failure, generic_done }; static int user_reset_fdc(int drive, int arg, int interruptible) { int ret; ret=0; LOCK_FDC(drive,interruptible); if (arg == FD_RESET_ALWAYS) FDCS->reset=1; if (FDCS->reset){ cont = &reset_cont; WAIT(reset_fdc); } process_fd_request(); return ret; } /* * Misc Ioctl's and support * ======================== */ static int fd_copyout(void *param, const void *address, unsigned long size) { int ret; ECALL(verify_area(VERIFY_WRITE,param,size)); memcpy_tofs(param,(void *) address, size); return 0; } static int fd_copyin(void *param, void *address, unsigned long size) { int ret; ECALL(verify_area(VERIFY_READ,param,size)); memcpy_fromfs((void *) address, param, size); return 0; } #define COPYOUT(x) ECALL(fd_copyout((void *)param, &(x), sizeof(x))) #define COPYIN(x) ECALL(fd_copyin((void *)param, &(x), sizeof(x))) static inline const char *drive_name(int type, int drive) { struct floppy_struct *floppy; if (type) floppy = floppy_type + type; else { if (UDP->native_format) floppy = floppy_type + UDP->native_format; else return "(null)"; } if (floppy->name) return floppy->name; else return "(null)"; } /* raw commands */ static void raw_cmd_done(int flag) { int i; if (!flag) { raw_cmd->flags |= FD_RAW_FAILURE; raw_cmd->flags |= FD_RAW_HARDFAILURE; } else { raw_cmd->reply_count = inr; for (i=0; i< raw_cmd->reply_count; i++) raw_cmd->reply[i] = reply_buffer[i]; if (raw_cmd->flags & (FD_RAW_READ | FD_RAW_WRITE)) raw_cmd->length = fd_get_dma_residue(); if ((raw_cmd->flags & FD_RAW_SOFTFAILURE) && (!raw_cmd->reply_count || (raw_cmd->reply[0] & 0xc0))) raw_cmd->flags |= FD_RAW_FAILURE; if (disk_change(current_drive)) raw_cmd->flags |= FD_RAW_DISK_CHANGE; else raw_cmd->flags &= ~FD_RAW_DISK_CHANGE; if (raw_cmd->flags & FD_RAW_NO_MOTOR_AFTER) motor_off_callback(current_drive); if (raw_cmd->next && (!(raw_cmd->flags & FD_RAW_FAILURE) || !(raw_cmd->flags & FD_RAW_STOP_IF_FAILURE)) && ((raw_cmd->flags & FD_RAW_FAILURE) || !(raw_cmd->flags &FD_RAW_STOP_IF_SUCCESS))) { raw_cmd = raw_cmd->next; return; } } generic_done(flag); } static struct cont_t raw_cmd_cont={ success_and_wakeup, floppy_start, generic_failure, raw_cmd_done }; static inline int raw_cmd_copyout(int cmd, char *param, struct floppy_raw_cmd *ptr) { struct old_floppy_raw_cmd old_raw_cmd; int ret; while(ptr) { if (cmd == OLDFDRAWCMD) { old_raw_cmd.flags = ptr->flags; old_raw_cmd.data = ptr->data; old_raw_cmd.length = ptr->length; old_raw_cmd.rate = ptr->rate; old_raw_cmd.reply_count = ptr->reply_count; memcpy(old_raw_cmd.reply, ptr->reply, 7); COPYOUT(old_raw_cmd); param += sizeof(old_raw_cmd); } else { COPYOUT(*ptr); param += sizeof(struct floppy_raw_cmd); } if ((ptr->flags & FD_RAW_READ) && ptr->buffer_length){ if (ptr->length>=0 && ptr->length<=ptr->buffer_length) ECALL(fd_copyout(ptr->data, ptr->kernel_data, ptr->buffer_length - ptr->length)); } ptr = ptr->next; } return 0; } static void raw_cmd_free(struct floppy_raw_cmd **ptr) { struct floppy_raw_cmd *next,*this; this = *ptr; *ptr = 0; while(this) { if (this->buffer_length) { fd_dma_mem_free((unsigned long)this->kernel_data, this->buffer_length); this->buffer_length = 0; } next = this->next; kfree(this); this = next; } } static inline int raw_cmd_copyin(int cmd, char *param, struct floppy_raw_cmd **rcmd) { struct floppy_raw_cmd *ptr; struct old_floppy_raw_cmd old_raw_cmd; int ret; int i; *rcmd = 0; while(1) { ptr = (struct floppy_raw_cmd *) kmalloc(sizeof(struct floppy_raw_cmd), GFP_USER); if (!ptr) return -ENOMEM; *rcmd = ptr; if (cmd == OLDFDRAWCMD){ COPYIN(old_raw_cmd); ptr->flags = old_raw_cmd.flags; ptr->data = old_raw_cmd.data; ptr->length = old_raw_cmd.length; ptr->rate = old_raw_cmd.rate; ptr->cmd_count = old_raw_cmd.cmd_count; ptr->track = old_raw_cmd.track; ptr->phys_length = 0; ptr->next = 0; ptr->buffer_length = 0; memcpy(ptr->cmd, old_raw_cmd.cmd, 9); param += sizeof(struct old_floppy_raw_cmd); if (ptr->cmd_count > 9) return -EINVAL; } else { COPYIN(*ptr); ptr->next = 0; ptr->buffer_length = 0; param += sizeof(struct floppy_raw_cmd); if (ptr->cmd_count > 33) /* the command may now also take up the space * initially intended for the reply & the * reply count. Needed for long 82078 commands * such as RESTORE, which takes ... 17 command * bytes. Murphy's law #137: When you reserve * 16 bytes for a structure, you'll one day * discover that you really need 17... */ return -EINVAL; } for (i=0; i< 16; i++) ptr->reply[i] = 0; ptr->resultcode = 0; ptr->kernel_data = 0; if (ptr->flags & (FD_RAW_READ | FD_RAW_WRITE)) { if (ptr->length <= 0) return -EINVAL; ptr->kernel_data =(char*)fd_dma_mem_alloc(ptr->length); if (!ptr->kernel_data) return -ENOMEM; ptr->buffer_length = ptr->length; } if ( ptr->flags & FD_RAW_READ ) ECALL( verify_area( VERIFY_WRITE, ptr->data, ptr->length )); if (ptr->flags & FD_RAW_WRITE) ECALL(fd_copyin(ptr->data, ptr->kernel_data, ptr->length)); rcmd = & (ptr->next); if (!(ptr->flags & FD_RAW_MORE)) return 0; ptr->rate &= 0x43; } } static int raw_cmd_ioctl(int cmd, void *param) { int drive, ret, ret2; struct floppy_raw_cmd *my_raw_cmd; if (FDCS->rawcmd <= 1) FDCS->rawcmd = 1; for (drive= 0; drive < N_DRIVE; drive++){ if (FDC(drive) != fdc) continue; if (drive == current_drive){ if (UDRS->fd_ref > 1){ FDCS->rawcmd = 2; break; } } else if (UDRS->fd_ref){ FDCS->rawcmd = 2; break; } } if (FDCS->reset) return -EIO; ret = raw_cmd_copyin(cmd, param, &my_raw_cmd); if (ret) { raw_cmd_free(&my_raw_cmd); return ret; } raw_cmd = my_raw_cmd; cont = &raw_cmd_cont; ret=wait_til_done(floppy_start,1); #ifdef DCL_DEBUG if (DP->flags & FD_DEBUG){ DPRINT("calling disk change from raw_cmd ioctl\n"); } #endif if (ret != -EINTR && FDCS->reset) ret = -EIO; DRS->track = NO_TRACK; ret2 = raw_cmd_copyout(cmd, param, my_raw_cmd); if (!ret) ret = ret2; raw_cmd_free(&my_raw_cmd); return ret; } static int invalidate_drive(kdev_t rdev) { /* invalidate the buffer track to force a reread */ set_bit(DRIVE(rdev), &fake_change); process_fd_request(); check_disk_change(rdev); return 0; } static inline void clear_write_error(int drive) { CLEARSTRUCT(UDRWE); } static inline int set_geometry(unsigned int cmd, struct floppy_struct *g, int drive, int type, kdev_t device) { int cnt; /* sanity checking for parameters.*/ if (g->sect <= 0 || g->head <= 0 || g->track <= 0 || g->track > UDP->tracks>>STRETCH(g) || /* check if reserved bits are set */ (g->stretch&~(FD_STRETCH|FD_SWAPSIDES)) != 0) return -EINVAL; if (type){ if (!suser()) return -EPERM; LOCK_FDC(drive,1); for (cnt = 0; cnt < N_DRIVE; cnt++){ if (ITYPE(drive_state[cnt].fd_device) == type && drive_state[cnt].fd_ref) set_bit(drive, &fake_change); } floppy_type[type] = *g; floppy_type[type].name="user format"; for (cnt = type << 2; cnt < (type << 2) + 4; cnt++) floppy_sizes[cnt]= floppy_sizes[cnt+0x80]= floppy_type[type].size>>1; process_fd_request(); for (cnt = 0; cnt < N_DRIVE; cnt++){ if (ITYPE(drive_state[cnt].fd_device) == type && drive_state[cnt].fd_ref) check_disk_change( MKDEV(FLOPPY_MAJOR, drive_state[cnt].fd_device)); } } else { LOCK_FDC(drive,1); if (cmd != FDDEFPRM) /* notice a disk change immediately, else * we loose our settings immediately*/ CALL(poll_drive(1, FD_RAW_NEED_DISK)); user_params[drive] = *g; if (buffer_drive == drive) SUPBOUND(buffer_max, user_params[drive].sect); current_type[drive] = &user_params[drive]; floppy_sizes[drive] = user_params[drive].size >> 1; if (cmd == FDDEFPRM) DRS->keep_data = -1; else DRS->keep_data = 1; /* invalidation. Invalidate only when needed, i.e. * when there are already sectors in the buffer cache * whose number will change. This is useful, because * mtools often changes the geometry of the disk after * looking at the boot block */ if (DRS->maxblock > user_params[drive].sect || DRS->maxtrack) invalidate_drive(device); else process_fd_request(); } return 0; } /* handle obsolete ioctl's */ static struct translation_entry { int newcmd; int oldcmd; int oldsize; /* size of 0x00xx-style ioctl. Reflects old structures, thus * use numeric values. NO SIZEOFS */ } translation_table[]= { {FDCLRPRM, 0, 0}, {FDSETPRM, 1, 28}, {FDDEFPRM, 2, 28}, {FDGETPRM, 3, 28}, {FDMSGON, 4, 0}, {FDMSGOFF, 5, 0}, {FDFMTBEG, 6, 0}, {FDFMTTRK, 7, 12}, {FDFMTEND, 8, 0}, {FDSETEMSGTRESH, 10, 0}, {FDFLUSH, 11, 0}, {FDSETMAXERRS, 12, 20}, {OLDFDRAWCMD, 30, 0}, {FDGETMAXERRS, 14, 20}, {FDGETDRVTYP, 16, 16}, {FDSETDRVPRM, 20, 88}, {FDGETDRVPRM, 21, 88}, {FDGETDRVSTAT, 22, 52}, {FDPOLLDRVSTAT, 23, 52}, {FDRESET, 24, 0}, {FDGETFDCSTAT, 25, 40}, {FDWERRORCLR, 27, 0}, {FDWERRORGET, 28, 24}, {FDRAWCMD, 0, 0}, {FDEJECT, 0, 0}, {FDTWADDLE, 40, 0} }; static inline int normalize_0x02xx_ioctl(int *cmd, int *size) { int i; for (i=0; i < ARRAY_SIZE(translation_table); i++) { if ((*cmd & 0xffff) == (translation_table[i].newcmd & 0xffff)){ *size = _IOC_SIZE(*cmd); *cmd = translation_table[i].newcmd; if (*size > _IOC_SIZE(*cmd)) { printk("ioctl not yet supported\n"); return -EFAULT; } return 0; } } return -EINVAL; } static inline int xlate_0x00xx_ioctl(int *cmd, int *size) { int i; /* old ioctls' for kernels <= 1.3.33 */ /* When the next even release will come around, we'll start * warning against these. * When the next odd release will come around, we'll fail with * -EINVAL */ if(strcmp(system_utsname.version, "1.4.0") >= 0) printk("obsolete floppy ioctl %x\n", *cmd); if((system_utsname.version[0] == '1' && strcmp(system_utsname.version, "1.5.0") >= 0) || (system_utsname.version[0] >= '2' && strcmp(system_utsname.version, "2.1.0") >= 0)) return -EINVAL; for (i=0; i < ARRAY_SIZE(translation_table); i++) { if (*cmd == translation_table[i].oldcmd) { *size = translation_table[i].oldsize; *cmd = translation_table[i].newcmd; return 0; } } return -EINVAL; } static int fd_ioctl(struct inode *inode, struct file *filp, unsigned int cmd, unsigned long param) { #define IOCTL_MODE_BIT 8 #define OPEN_WRITE_BIT 16 #define IOCTL_ALLOWED (filp && (filp->f_mode & IOCTL_MODE_BIT)) #define OUT(c,x) case c: outparam = (const char *) (x); break #define IN(c,x,tag) case c: *(x) = inparam. tag ; return 0 int i,drive,type; kdev_t device; int ret; int size; union inparam { struct floppy_struct g; /* geometry */ struct format_descr f; struct floppy_max_errors max_errors; struct floppy_drive_params dp; } inparam; /* parameters coming from user space */ const char *outparam; /* parameters passed back to user space */ device = inode->i_rdev; switch (cmd) { RO_IOCTLS(device,param); } type = TYPE(device); drive = DRIVE(device); /* convert compatibility eject ioctls into floppy eject ioctl. * We do this in order to provide a means to eject floppy disks before * installing the new fdutils package */ if(cmd == CDROMEJECT || /* CD-ROM eject */ cmd == 0x6470 /* SunOS floppy eject */) { DPRINT("obsolete eject ioctl\n"); DPRINT("please use floppycontrol --eject\n"); cmd = FDEJECT; } /* convert the old style command into a new style command */ if ((cmd & 0xff00) == 0x0200) { ECALL(normalize_0x02xx_ioctl(&cmd, &size)); } else if ((cmd & 0xff00) == 0x0000) { ECALL(xlate_0x00xx_ioctl(&cmd, &size)); } else return -EINVAL; /* permission checks */ if (((cmd & 0x80) && !suser()) || ((cmd & 0x40) && !IOCTL_ALLOWED)) return -EPERM; /* verify writability of result, and fail early */ if (_IOC_DIR(cmd) & _IOC_READ) ECALL(verify_area(VERIFY_WRITE,(void *) param, size)); /* copyin */ CLEARSTRUCT(&inparam); if (_IOC_DIR(cmd) & _IOC_WRITE) ECALL(fd_copyin((void *)param, &inparam, size)) switch (cmd) { case FDEJECT: if(UDRS->fd_ref != 1) /* somebody else has this drive open */ return -EBUSY; LOCK_FDC(drive,1); /* do the actual eject. Fails on * non-Sparc architectures */ ret=fd_eject(UNIT(drive)); USETF(FD_DISK_CHANGED); USETF(FD_VERIFY); process_fd_request(); return ret; case FDCLRPRM: LOCK_FDC(drive,1); current_type[drive] = NULL; floppy_sizes[drive] = MAX_DISK_SIZE; UDRS->keep_data = 0; return invalidate_drive(device); case FDSETPRM: case FDDEFPRM: return set_geometry(cmd, & inparam.g, drive, type, device); case FDGETPRM: LOCK_FDC(drive,1); CALL(poll_drive(1,0)); process_fd_request(); if (type) outparam = (char *) &floppy_type[type]; else outparam = (char *) current_type[drive]; if(!outparam) return -ENODEV; break; case FDMSGON: UDP->flags |= FTD_MSG; return 0; case FDMSGOFF: UDP->flags &= ~FTD_MSG; return 0; case FDFMTBEG: LOCK_FDC(drive,1); CALL(poll_drive(1, FD_RAW_NEED_DISK)); ret = UDRS->flags; process_fd_request(); if(ret & FD_VERIFY) return -ENODEV; if(!(ret & FD_DISK_WRITABLE)) return -EROFS; return 0; case FDFMTTRK: if (UDRS->fd_ref != 1) return -EBUSY; return do_format(device, &inparam.f); case FDFMTEND: case FDFLUSH: LOCK_FDC(drive,1); return invalidate_drive(device); case FDSETEMSGTRESH: UDP->max_errors.reporting = (unsigned short) (param & 0x0f); return 0; OUT(FDGETMAXERRS, &UDP->max_errors); IN(FDSETMAXERRS, &UDP->max_errors, max_errors); case FDGETDRVTYP: outparam = drive_name(type,drive); SUPBOUND(size,strlen(outparam)+1); break; IN(FDSETDRVPRM, UDP, dp); OUT(FDGETDRVPRM, UDP); case FDPOLLDRVSTAT: LOCK_FDC(drive,1); CALL(poll_drive(1, FD_RAW_NEED_DISK)); process_fd_request(); /* fall through */ OUT(FDGETDRVSTAT, UDRS); case FDRESET: return user_reset_fdc(drive, (int)param, 1); OUT(FDGETFDCSTAT,UFDCS); case FDWERRORCLR: CLEARSTRUCT(UDRWE); return 0; OUT(FDWERRORGET,UDRWE); case OLDFDRAWCMD: case FDRAWCMD: if (type) return -EINVAL; LOCK_FDC(drive,1); set_floppy(device); CALL(i = raw_cmd_ioctl(cmd,(void *) param)); process_fd_request(); return i; case FDTWADDLE: LOCK_FDC(drive,1); twaddle(); process_fd_request(); return 0; default: return -EINVAL; } if (_IOC_DIR(cmd) & _IOC_READ) return fd_copyout((void *)param, outparam, size); else return 0; #undef IOCTL_ALLOWED #undef OUT #undef IN } static void config_types(void) { int first=1; int drive; /* read drive info out of physical CMOS */ drive=0; if (!UDP->cmos) UDP->cmos= FLOPPY0_TYPE; drive=1; if (!UDP->cmos && FLOPPY1_TYPE) UDP->cmos = FLOPPY1_TYPE; /* XXX */ /* additional physical CMOS drive detection should go here */ for (drive=0; drive < N_DRIVE; drive++){ if (UDP->cmos >= 16) UDP->cmos = 0; if (UDP->cmos >= 0 && UDP->cmos <= NUMBER(default_drive_params)) memcpy((char *) UDP, (char *) (&default_drive_params[(int)UDP->cmos].params), sizeof(struct floppy_drive_params)); if (UDP->cmos){ if (first) printk(KERN_INFO "Floppy drive(s): "); else printk(", "); first=0; if (UDP->cmos > 0){ allowed_drive_mask |= 1 << drive; printk("fd%d is %s", drive, default_drive_params[(int)UDP->cmos].name); } else printk("fd%d is unknown type %d",drive, UDP->cmos); } } if (!first) printk("\n"); } static int floppy_read(struct inode * inode, struct file * filp, char * buf, int count) { int drive = DRIVE(inode->i_rdev); check_disk_change(inode->i_rdev); if (UTESTF(FD_DISK_CHANGED)) return -ENXIO; return block_read(inode, filp, buf, count); } static int floppy_write(struct inode * inode, struct file * filp, const char * buf, int count) { int block; int ret; int drive = DRIVE(inode->i_rdev); if (!UDRS->maxblock) UDRS->maxblock=1;/* make change detectable */ check_disk_change(inode->i_rdev); if (UTESTF(FD_DISK_CHANGED)) return -ENXIO; if (!UTESTF(FD_DISK_WRITABLE)) return -EROFS; block = (filp->f_pos + count) >> 9; INFBOUND(UDRS->maxblock, block); ret= block_write(inode, filp, buf, count); return ret; } static void floppy_release(struct inode * inode, struct file * filp) { int drive; drive = DRIVE(inode->i_rdev); if (!filp || (filp->f_mode & (2 | OPEN_WRITE_BIT))) /* if the file is mounted OR (writable now AND writable at * open time) Linus: Does this cover all cases? */ block_fsync(inode,filp); if (UDRS->fd_ref < 0) UDRS->fd_ref=0; else if (!UDRS->fd_ref--) { DPRINT("floppy_release with fd_ref == 0"); UDRS->fd_ref = 0; } floppy_release_irq_and_dma(); } /* * 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. */ #define RETERR(x) do{floppy_release(inode,filp); return -(x);}while(0) static int floppy_open(struct inode * inode, struct file * filp) { int drive; int old_dev; int try; char *tmp; if (!filp) { DPRINT("Weird, open called with filp=0\n"); return -EIO; } drive = DRIVE(inode->i_rdev); if (drive >= N_DRIVE || !(allowed_drive_mask & (1 << drive)) || fdc_state[FDC(drive)].version == FDC_NONE) return -ENXIO; if (TYPE(inode->i_rdev) >= NUMBER(floppy_type)) return -ENXIO; old_dev = UDRS->fd_device; if (UDRS->fd_ref && old_dev != MINOR(inode->i_rdev)) return -EBUSY; if (!UDRS->fd_ref && (UDP->flags & FD_BROKEN_DCL)){ USETF(FD_DISK_CHANGED); USETF(FD_VERIFY); } if (UDRS->fd_ref == -1 || (UDRS->fd_ref && (filp->f_flags & O_EXCL))) return -EBUSY; if (floppy_grab_irq_and_dma()) return -EBUSY; if (filp->f_flags & O_EXCL) UDRS->fd_ref = -1; else UDRS->fd_ref++; if (!floppy_track_buffer){ /* if opening an ED drive, reserve a big buffer, * else reserve a small one */ if ((UDP->cmos == 6) || (UDP->cmos == 5)) try = 64; /* Only 48 actually useful */ else try = 32; /* Only 24 actually useful */ tmp=(char *)fd_dma_mem_alloc(1024 * try); if (!tmp) { try >>= 1; /* buffer only one side */ INFBOUND(try, 16); tmp= (char *)fd_dma_mem_alloc(1024*try); } if (!tmp) { DPRINT("Unable to allocate DMA memory\n"); RETERR(ENXIO); } if (floppy_track_buffer) fd_dma_mem_free((unsigned long)tmp,try*1024); else { buffer_min = buffer_max = -1; floppy_track_buffer = tmp; max_buffer_sectors = try; } } UDRS->fd_device = MINOR(inode->i_rdev); if (old_dev != -1 && old_dev != MINOR(inode->i_rdev)) { if (buffer_drive == drive) buffer_track = -1; invalidate_buffers(MKDEV(FLOPPY_MAJOR,old_dev)); } /* Allow ioctls if we have write-permissions even if read-only open */ if ((filp->f_mode & 2) || (permission(inode,2) == 0)) filp->f_mode |= IOCTL_MODE_BIT; if (filp->f_mode & 2) filp->f_mode |= OPEN_WRITE_BIT; if (UFDCS->rawcmd == 1) UFDCS->rawcmd = 2; if (filp->f_flags & O_NDELAY) return 0; if (filp->f_mode & 3) { UDRS->last_checked = 0; check_disk_change(inode->i_rdev); if (UTESTF(FD_DISK_CHANGED)) RETERR(ENXIO); } if ((filp->f_mode & 2) && !(UTESTF(FD_DISK_WRITABLE))) RETERR(EROFS); return 0; #undef RETERR } /* * Check if the disk has been changed or if a change has been faked. */ static int check_floppy_change(kdev_t dev) { int drive = DRIVE(dev); if (MAJOR(dev) != MAJOR_NR) { DPRINT("check_floppy_change: not a floppy\n"); return 0; } if (UTESTF(FD_DISK_CHANGED) || UTESTF(FD_VERIFY)) return 1; if (UDP->checkfreq < (int)(jiffies - UDRS->last_checked)) { lock_fdc(drive,0); poll_drive(0,0); process_fd_request(); } if (UTESTF(FD_DISK_CHANGED) || UTESTF(FD_VERIFY) || test_bit(drive, &fake_change) || (!TYPE(dev) && !current_type[drive])) return 1; return 0; } /* revalidate the floppy disk, i.e. trigger format autodetection by reading * the bootblock (block 0). "Autodetection" is also needed to check whether * there is a disk in the drive at all... Thus we also do it for fixed * geometry formats */ static int floppy_revalidate(kdev_t dev) { #define NO_GEOM (!current_type[drive] && !TYPE(dev)) struct buffer_head * bh; int drive=DRIVE(dev); int cf; if (UTESTF(FD_DISK_CHANGED) || UTESTF(FD_VERIFY) || test_bit(drive, &fake_change) || NO_GEOM){ lock_fdc(drive,0); cf = UTESTF(FD_DISK_CHANGED) || UTESTF(FD_VERIFY); if (!(cf || test_bit(drive, &fake_change) || NO_GEOM)){ process_fd_request(); /*already done by another thread*/ return 0; } UDRS->maxblock = 0; UDRS->maxtrack = 0; if (buffer_drive == drive) buffer_track = -1; clear_bit(drive, &fake_change); UCLEARF(FD_DISK_CHANGED); if (cf) UDRS->generation++; if (NO_GEOM){ /* auto-sensing */ int size = floppy_blocksizes[MINOR(dev)]; if (!size) size = 1024; if (!(bh = getblk(dev,0,size))){ process_fd_request(); return 1; } if (bh && !buffer_uptodate(bh)) ll_rw_block(READ, 1, &bh); process_fd_request(); wait_on_buffer(bh); brelse(bh); return 0; } if (cf) poll_drive(0, FD_RAW_NEED_DISK); process_fd_request(); } return 0; } static struct file_operations floppy_fops = { NULL, /* lseek - default */ floppy_read, /* read - general block-dev read */ floppy_write, /* write - general block-dev write */ NULL, /* readdir - bad */ NULL, /* select */ fd_ioctl, /* ioctl */ NULL, /* mmap */ floppy_open, /* open */ floppy_release, /* release */ block_fsync, /* fsync */ NULL, /* fasync */ check_floppy_change, /* media_change */ floppy_revalidate, /* revalidate */ }; /* * Floppy Driver initialization * ============================= */ /* Determine the floppy disk controller type */ /* This routine was written by David C. Niemi */ static char get_fdc_version(void) { int r; output_byte(FD_DUMPREGS); /* 82072 and better know DUMPREGS */ if (FDCS->reset) return FDC_NONE; if ((r = result()) <= 0x00) return FDC_NONE; /* No FDC present ??? */ if ((r==1) && (reply_buffer[0] == 0x80)){ printk(KERN_INFO "FDC %d is an 8272A\n",fdc); return FDC_8272A; /* 8272a/765 don't know DUMPREGS */ } if (r != 10) { printk("FDC %d init: DUMPREGS: unexpected return of %d bytes.\n", fdc, r); return FDC_UNKNOWN; } if(!fdc_configure()) { printk(KERN_INFO "FDC %d is an 82072\n",fdc); return FDC_82072; /* 82072 doesn't know CONFIGURE */ } output_byte(FD_PERPENDICULAR); if(need_more_output() == MORE_OUTPUT) { output_byte(0); } else { printk(KERN_INFO "FDC %d is an 82072A\n", fdc); return FDC_82072A; /* 82072A as found on Sparcs. */ } output_byte(FD_UNLOCK); r = result(); if ((r == 1) && (reply_buffer[0] == 0x80)){ printk(KERN_INFO "FDC %d is a pre-1991 82077\n", fdc); return FDC_82077_ORIG; /* Pre-1991 82077, doesn't know * LOCK/UNLOCK */ } if ((r != 1) || (reply_buffer[0] != 0x00)) { printk("FDC %d init: UNLOCK: unexpected return of %d bytes.\n", fdc, r); return FDC_UNKNOWN; } output_byte(FD_PARTID); r = result(); if (r != 1) { printk("FDC %d init: PARTID: unexpected return of %d bytes.\n", fdc, r); return FDC_UNKNOWN; } if (reply_buffer[0] == 0x80) { printk(KERN_INFO "FDC %d is a post-1991 82077\n",fdc); return FDC_82077; /* Revised 82077AA passes all the tests */ } switch (reply_buffer[0] >> 5) { case 0x0: /* Either a 82078-1 or a 82078SL running at 5Volt */ printk(KERN_INFO "FDC %d is an 82078.\n",fdc); return FDC_82078; case 0x1: printk(KERN_INFO "FDC %d is a 44pin 82078\n",fdc); return FDC_82078; case 0x2: printk(KERN_INFO "FDC %d is a S82078B\n", fdc); return FDC_S82078B; case 0x3: printk(KERN_INFO "FDC %d is a National Semiconductor PC87306\n", fdc); return FDC_87306; default: printk(KERN_INFO "FDC %d init: 82078 variant with unknown PARTID=%d.\n", fdc, reply_buffer[0] >> 5); return FDC_82078_UNKN; } } /* get_fdc_version */ /* lilo configuration */ /* we make the invert_dcl function global. One day, somebody might * want to centralize all thinkpad related options into one lilo option, * there are just so many thinkpad related quirks! */ void floppy_invert_dcl(int *ints,int param) { int i; for (i=0; i < ARRAY_SIZE(default_drive_params); i++){ if (param) default_drive_params[i].params.flags |= 0x80; else default_drive_params[i].params.flags &= ~0x80; } DPRINT("Configuring drives for inverted dcl\n"); } static void daring(int *ints,int param) { int i; for (i=0; i < ARRAY_SIZE(default_drive_params); i++){ if (param){ default_drive_params[i].params.select_delay = 0; default_drive_params[i].params.flags |= FD_SILENT_DCL_CLEAR; } else { default_drive_params[i].params.select_delay = 2*HZ/100; default_drive_params[i].params.flags &= ~FD_SILENT_DCL_CLEAR; } } DPRINT("Assuming %s floppy hardware\n", param ? "standard" : "broken"); } static void set_cmos(int *ints, int dummy) { int current_drive=0; if (ints[0] != 2){ DPRINT("wrong number of parameter for cmos\n"); return; } current_drive = ints[1]; if (current_drive < 0 || current_drive >= 8){ DPRINT("bad drive for set_cmos\n"); return; } if (current_drive >= 4 && !FDC2) FDC2 = 0x370; if (ints[2] <= 0 || (ints[2] >= NUMBER(default_drive_params) && ints[2] != 16)){ DPRINT("bad cmos code %d\n", ints[2]); return; } DP->cmos = ints[2]; DPRINT("setting cmos code to %d\n", ints[2]); } static struct param_table { const char *name; void (*fn)(int *ints, int param); int *var; int def_param; } config_params[]={ { "allowed_drive_mask", 0, &allowed_drive_mask, 0xff }, { "all_drives", 0, &allowed_drive_mask, 0xff }, { "asus_pci", 0, &allowed_drive_mask, 0x33 }, { "daring", daring, 0, 1}, { "two_fdc", 0, &FDC2, 0x370 }, { "one_fdc", 0, &FDC2, 0 }, { "thinkpad", floppy_invert_dcl, 0, 1 }, { "nodma", 0, &use_virtual_dma, 1 }, { "omnibook", 0, &use_virtual_dma, 1 }, { "dma", 0, &use_virtual_dma, 0 }, { "fifo_depth", 0, &fifo_depth, 0xa }, { "nofifo", 0, &no_fifo, 0x20 }, { "usefifo", 0, &no_fifo, 0 }, { "cmos", set_cmos, 0, 0 }, { "unexpected_interrupts", 0, &print_unex, 1 }, { "no_unexpected_interrupts", 0, &print_unex, 0 }, { "L40SX", 0, &print_unex, 0 } }; #define FLOPPY_SETUP void floppy_setup(char *str, int *ints) { int i; int param; if (str) for (i=0; i< ARRAY_SIZE(config_params); i++){ if (strcmp(str,config_params[i].name) == 0){ if (ints[0]) param = ints[1]; else param = config_params[i].def_param; if(config_params[i].fn) config_params[i].fn(ints,param); if(config_params[i].var) { DPRINT("%s=%d\n", str, param); *config_params[i].var = param; } return; } } if (str) { DPRINT("unknown floppy option [%s]\n", str); DPRINT("allowed options are:"); for (i=0; i< ARRAY_SIZE(config_params); i++) printk(" %s",config_params[i].name); printk("\n"); } else DPRINT("botched floppy option\n"); DPRINT("Read linux/drivers/block/README.fd\n"); } int floppy_init(void) { int i,unit,drive; int have_no_fdc= -EIO; raw_cmd = 0; if (register_blkdev(MAJOR_NR,"fd",&floppy_fops)) { printk("Unable to get major %d for floppy\n",MAJOR_NR); return -EBUSY; } for (i=0; i<256; i++) if (ITYPE(i)) floppy_sizes[i] = floppy_type[ITYPE(i)].size >> 1; else floppy_sizes[i] = MAX_DISK_SIZE; blk_size[MAJOR_NR] = floppy_sizes; blksize_size[MAJOR_NR] = floppy_blocksizes; blk_dev[MAJOR_NR].request_fn = DEVICE_REQUEST; reschedule_timeout(MAXTIMEOUT, "floppy init", MAXTIMEOUT); config_types(); for (i = 0; i < N_FDC; i++) { fdc = i; CLEARSTRUCT(FDCS); FDCS->dtr = -1; FDCS->dor = 0x4; #ifdef __sparc__ /*sparcs don't have a DOR reset which we can fall back on to*/ FDCS->version = FDC_82072A; #endif } fdc_state[0].address = FDC1; #if N_FDC > 1 fdc_state[1].address = FDC2; #endif if (floppy_grab_irq_and_dma()){ del_timer(&fd_timeout); blk_dev[MAJOR_NR].request_fn = NULL; unregister_blkdev(MAJOR_NR,"fd"); return -EBUSY; } /* initialise drive state */ for (drive = 0; drive < N_DRIVE; drive++) { CLEARSTRUCT(UDRS); CLEARSTRUCT(UDRWE); UDRS->flags = FD_VERIFY | FD_DISK_NEWCHANGE | FD_DISK_CHANGED; UDRS->fd_device = -1; floppy_track_buffer = NULL; max_buffer_sectors = 0; } for (i = 0; i < N_FDC; i++) { fdc = i; FDCS->driver_version = FD_DRIVER_VERSION; for (unit=0; unit<4; unit++) FDCS->track[unit] = 0; if (FDCS->address == -1) continue; FDCS->rawcmd = 2; if (user_reset_fdc(-1,FD_RESET_ALWAYS,0)){ FDCS->address = -1; FDCS->version = FDC_NONE; continue; } /* Try to determine the floppy controller type */ FDCS->version = get_fdc_version(); if (FDCS->version == FDC_NONE){ FDCS->address = -1; continue; } request_region(FDCS->address, 6, "floppy"); request_region(FDCS->address+7, 1, "floppy DIR"); /* address + 6 is reserved, and may be taken by IDE. * Unfortunately, Adaptec doesn't know this :-(, */ have_no_fdc = 0; /* Not all FDCs seem to be able to handle the version command * properly, so force a reset for the standard FDC clones, * to avoid interrupt garbage. */ user_reset_fdc(-1,FD_RESET_ALWAYS,0); } fdc=0; del_timer(&fd_timeout); current_drive = 0; floppy_release_irq_and_dma(); initialising=0; if (have_no_fdc) { DPRINT("no floppy controllers found\n"); request_tq.routine = (void *)(void *) empty; /* * When we return we may be unloaded. This little * trick forces the immediate_bh handler to have run * before we unload it, lest we cause bad things. */ mark_bh(IMMEDIATE_BH); schedule(); if (usage_count) floppy_release_irq_and_dma(); blk_dev[MAJOR_NR].request_fn = NULL; unregister_blkdev(MAJOR_NR,"fd"); } return have_no_fdc; } static int floppy_grab_irq_and_dma(void) { int i; unsigned long flags; INT_OFF; if (usage_count++){ INT_ON; return 0; } INT_ON; MOD_INC_USE_COUNT; for (i=0; i< N_FDC; i++){ if (fdc_state[i].address != -1){ fdc = i; reset_fdc_info(1); fd_outb(FDCS->dor, FD_DOR); } } fdc = 0; set_dor(0, ~0, 8); /* avoid immediate interrupt */ if (fd_request_irq()) { DPRINT("Unable to grab IRQ%d for the floppy driver\n", FLOPPY_IRQ); MOD_DEC_USE_COUNT; usage_count--; return -1; } if (fd_request_dma()) { DPRINT("Unable to grab DMA%d for the floppy driver\n", FLOPPY_DMA); fd_free_irq(); MOD_DEC_USE_COUNT; usage_count--; return -1; } for (fdc = 0; fdc < N_FDC; fdc++) if (FDCS->address != -1) fd_outb(FDCS->dor, FD_DOR); fdc = 0; fd_enable_irq(); irqdma_allocated=1; return 0; } static void floppy_release_irq_and_dma(void) { #ifdef FLOPPY_SANITY_CHECK int drive; #endif long tmpsize; unsigned long tmpaddr; unsigned long flags; INT_OFF; if (--usage_count){ INT_ON; return; } INT_ON; if(irqdma_allocated) { fd_disable_dma(); fd_free_dma(); fd_disable_irq(); fd_free_irq(); irqdma_allocated=0; } set_dor(0, ~0, 8); #if N_FDC > 1 set_dor(1, ~8, 0); #endif floppy_enable_hlt(); if (floppy_track_buffer && max_buffer_sectors) { tmpsize = max_buffer_sectors*1024; tmpaddr = (unsigned long)floppy_track_buffer; floppy_track_buffer = 0; max_buffer_sectors = 0; buffer_min = buffer_max = -1; fd_dma_mem_free(tmpaddr, tmpsize); } #ifdef FLOPPY_SANITY_CHECK #ifndef __sparc__ for (drive=0; drive < N_FDC * 4; drive++) if (motor_off_timer[drive].next) printk("motor off timer %d still active\n", drive); #endif if (fd_timeout.next) printk("floppy timer still active:%s\n", timeout_message); if (fd_timer.next) printk("auxiliary floppy timer still active\n"); if (floppy_tq.sync) printk("task queue still active\n"); #endif MOD_DEC_USE_COUNT; } #ifdef MODULE extern char *get_options(char *str, int *ints); char *floppy=NULL; static void parse_floppy_cfg_string(char *cfg) { char *ptr; int ints[11]; while(*cfg) { for(ptr = cfg;*cfg && *cfg != ' ' && *cfg != '\t'; cfg++); if(*cfg) { *cfg = '\0'; cfg++; } if(*ptr) floppy_setup(get_options(ptr,ints),ints); } } static void mod_setup(char *pattern, void (*setup)(char *, int *)) { unsigned long i; char c; int j; int match; char buffer[100]; int ints[11]; int length = strlen(pattern)+1; match=0; j=1; for (i=current->mm->env_start; i< current->mm->env_end; i ++){ c= get_fs_byte(i); if (match){ if (j==99) c='\0'; buffer[j] = c; if (!c || c == ' ' || c == '\t'){ if (j){ buffer[j] = '\0'; setup(get_options(buffer,ints),ints); } j=0; } else j++; if (!c) break; continue; } if ((!j && !c) || (j && c == pattern[j-1])) j++; else j=0; if (j==length){ match=1; j=0; } } } #ifdef __cplusplus extern "C" { #endif int init_module(void) { printk(KERN_INFO "inserting floppy driver for %s\n", kernel_version); if(floppy) parse_floppy_cfg_string(floppy); else mod_setup("floppy=", floppy_setup); return floppy_init(); } void cleanup_module(void) { int fdc, dummy; for (fdc=0; fdc<2; fdc++) if (FDCS->address != -1){ release_region(FDCS->address, 6); release_region(FDCS->address+7, 1); } unregister_blkdev(MAJOR_NR, "fd"); blk_dev[MAJOR_NR].request_fn = 0; /* eject disk, if any */ dummy = fd_eject(0); } #ifdef __cplusplus } #endif #else /* eject the boot floppy (if we need the drive for a different root floppy) */ /* This should only be called at boot time when we're sure that there's no * resource contention. */ void floppy_eject(void) { int dummy; if(floppy_grab_irq_and_dma()==0) { lock_fdc(MAXTIMEOUT,0); dummy=fd_eject(0); process_fd_request(); floppy_release_irq_and_dma(); } } #endif