floppy.c
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上传用户:ajay2009
上传日期:2009-05-22
资源大小:495k
文件大小:119k
源码类别:
驱动编程
开发平台:
Unix_Linux
- /*
- * linux/drivers/block/floppy.c
- *
- * Copyright (C) 1991, 1992 Linus Torvalds
- * Copyright (C) 1993, 1994 Alain Knaff
- * Copyright (C) 1998 Alan Cox
- */
- /*
- * 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.
- */
- /*
- * 1998/05/07 -- Russell King -- More portability cleanups; moved definition of
- * interrupt and dma channel to asm/floppy.h. Cleaned up some formatting &
- * use of '0' for NULL.
- */
- /*
- * 1998/06/07 -- Alan Cox -- Merged the 2.0.34 fixes for resource allocation
- * failures.
- */
- /*
- * 1998/09/20 -- David Weinehall -- Added slow-down code for buggy PS/2-drives.
- */
- /*
- * 1999/08/13 -- 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).
- */
- /*
- * 2000/08/28 -- Arnaldo Carvalho de Melo <acme@conectiva.com.br>
- * - get rid of check_region
- * - s/suser/capable/
- */
- /*
- * 2001/08/26 -- Paul Gortmaker - fix insmod oops on machines with no
- * floppy controller (lingering task on list after module is gone... boom.)
- */
- /*
- * 2002/02/07 -- Anton Altaparmakov - Fix io ports reservation to correct range
- * (0x3f2-0x3f5, 0x3f7). This fix is a bit of a hack but the proper fix
- * requires many non-obvious changes in arch dependent code.
- */
- /* 2003/07/28 -- Daniele Bellucci <bellucda@tiscali.it>.
- * Better audit of register_blkdev.
- */
- #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/module.h>
- #include <linux/sched.h>
- #include <linux/fs.h>
- #include <linux/kernel.h>
- #include <linux/timer.h>
- #include <linux/workqueue.h>
- #define FDPATCHES
- #include <linux/fdreg.h>
- /*
- * 1998/1/21 -- Richard Gooch <rgooch@atnf.csiro.au> -- devfs support
- */
- #include <linux/fd.h>
- #include <linux/hdreg.h>
- #include <linux/errno.h>
- #include <linux/slab.h>
- #include <linux/mm.h>
- #include <linux/bio.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 <linux/init.h>
- #include <linux/devfs_fs_kernel.h>
- #include <linux/device.h>
- #include <linux/buffer_head.h> /* for invalidate_buffers() */
- /*
- * PS/2 floppies have much slower step rates than regular floppies.
- * It's been recommended that take about 1/4 of the default speed
- * in some more extreme cases.
- */
- static int slow_floppy;
- #include <asm/dma.h>
- #include <asm/irq.h>
- #include <asm/system.h>
- #include <asm/io.h>
- #include <asm/uaccess.h>
- static int FLOPPY_IRQ = 6;
- static int FLOPPY_DMA = 2;
- static int can_use_virtual_dma = 2;
- /* =======
- * can use virtual DMA:
- * 0 = use of virtual DMA disallowed by config
- * 1 = use of virtual DMA prescribed by config
- * 2 = no virtual DMA preference configured. By default try hard DMA,
- * but fall back on virtual DMA when not enough memory available
- */
- static int use_virtual_dma;
- /* =======
- * use virtual DMA
- * 0 using hard DMA
- * 1 using virtual DMA
- * This variable is set to virtual when a DMA mem problem arises, and
- * reset back in floppy_grab_irq_and_dma.
- * It is not safe to reset it in other circumstances, because the floppy
- * driver may have several buffers in use at once, and we do currently not
- * record each buffers capabilities
- */
- static DEFINE_SPINLOCK(floppy_lock);
- static struct completion device_release;
- static unsigned short virtual_dma_port = 0x3f0;
- irqreturn_t floppy_interrupt(int irq, void *dev_id, struct pt_regs *regs);
- static int set_dor(int fdc, char mask, char data);
- static void register_devfs_entries(int drive) __init;
- #define K_64 0x10000 /* 64KB */
- /* 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.
- *
- * NOTE: This must come before we include the arch floppy header because
- * some ports reference this variable from there. -DaveM
- */
- static int allowed_drive_mask = 0x33;
- #include <asm/floppy.h>
- static int irqdma_allocated;
- #define LOCAL_END_REQUEST
- #define DEVICE_NAME "floppy"
- #include <linux/blkdev.h>
- #include <linux/blkpg.h>
- #include <linux/cdrom.h> /* for the compatibility eject ioctl */
- #include <linux/completion.h>
- static struct request *current_req;
- static struct request_queue *floppy_queue;
- static void do_fd_request(request_queue_t * q);
- #ifndef fd_get_dma_residue
- #define fd_get_dma_residue() get_dma_residue(FLOPPY_DMA)
- #endif
- /* Dma Memory related stuff */
- #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
- static inline void fallback_on_nodma_alloc(char **addr, size_t l)
- {
- #ifdef FLOPPY_CAN_FALLBACK_ON_NODMA
- if (*addr)
- return; /* we have the memory */
- if (can_use_virtual_dma != 2)
- return; /* no fallback allowed */
- printk
- ("DMA memory shortage. Temporarily falling back on virtual DMAn");
- *addr = (char *)nodma_mem_alloc(l);
- #else
- return;
- #endif
- }
- /* End dma memory related stuff */
- static unsigned long fake_change;
- static int initialising = 1;
- #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)))
- /* 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 */
- /*
- * 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)
- /*
- * 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 timer_list motor_off_timer[N_DRIVE];
- static struct gendisk *disks[N_DRIVE];
- static struct block_device *opened_bdev[N_DRIVE];
- static DECLARE_MUTEX(open_lock);
- 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)).
- */
- /*
- Size
- | Sectors per track
- | | Head
- | | | Tracks
- | | | | Stretch
- | | | | | Gap 1 size
- | | | | | | Data rate, | 0x40 for perp
- | | | | | | | Spec1 (stepping rate, head unload
- | | | | | | | | /fmt gap (gap2) */
- 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];
- /*
- * User-provided type information. current_type points to
- * the respective entry of this array.
- */
- static struct floppy_struct user_params[N_DRIVE];
- static sector_t floppy_sizes[256];
- static char floppy_device_name[] = "floppy";
- /*
- * 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;
- /* 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;
- static unsigned long fdc_busy;
- static DECLARE_WAIT_QUEUE_HEAD(fdc_wait);
- static DECLARE_WAIT_QUEUE_HEAD(command_done);
- #define NO_SIGNAL (!interruptible || !signal_pending(current))
- #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;
- static int max_buffer_sectors;
- 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;
- 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(unsigned long);
- 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;
- /* 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;
- static long current_count_sectors;
- static unsigned char fsector_t; /* sector in track */
- static unsigned char in_sector_offset; /* offset within physical sector,
- * expressed in units of 512 bytes */
- #ifndef fd_eject
- static inline int fd_eject(int drive)
- {
- return -EINVAL;
- }
- #endif
- /*
- * Debugging
- * =========
- */
- #ifdef DEBUGT
- static long unsigned debugtimer;
- static inline void set_debugt(void)
- {
- debugtimer = jiffies;
- }
- static inline void debugt(const char *message)
- {
- if (DP->flags & DEBUGT)
- printk("%s dtime=%lun", message, jiffies - debugtimer);
- }
- #else
- static inline void set_debugt(void) { }
- static inline void debugt(const char *message) { }
- #endif /* DEBUGT */
- typedef void (*timeout_fn) (unsigned long);
- static DEFINE_TIMER(fd_timeout, floppy_shutdown, 0, 0);
- 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 (test_bit(0, &fdc_busy) && command_status < 2
- && !timer_pending(&fd_timeout)) {
- DPRINT("timeout handler died: %sn", message);
- }
- }
- #endif
- static void (*do_floppy) (void) = NULL;
- #ifdef FLOPPY_SANITY_CHECK
- #define OLOGSIZE 20
- static void (*lasthandler) (void);
- static unsigned long interruptjiffies;
- static unsigned long resultjiffies;
- static int resultsize;
- static unsigned long lastredo;
- static struct output_log {
- unsigned char data;
- unsigned char status;
- unsigned long jiffies;
- } output_log[OLOGSIZE];
- static int output_log_pos;
- #endif
- #define current_reqD -1
- #define MAXTIMEOUT -2
- static void __reschedule_timeout(int drive, const char *message, int marg)
- {
- if (drive == current_reqD)
- 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 void reschedule_timeout(int drive, const char *message, int marg)
- {
- unsigned long flags;
- spin_lock_irqsave(&floppy_lock, flags);
- __reschedule_timeout(drive, message, marg);
- spin_unlock_irqrestore(&floppy_lock, flags);
- }
- #define INFBOUND(a,b) (a)=max_t(int, a, b)
- #define SUPBOUND(a,b) (a)=min_t(int, 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 earlyn");
- if (!(FDCS->dor & (0x10 << UNIT(drive))) ||
- (FDCS->dor & 3) != UNIT(drive) || fdc != FDC(drive)) {
- DPRINT("probing disk change on unselected driven");
- DPRINT("drive=%d fdc=%d dor=%xn", drive, FDC(drive),
- (unsigned int)FDCS->dor);
- }
- #endif
- #ifdef DCL_DEBUG
- if (UDP->flags & FD_DEBUG) {
- DPRINT("checking disk change line for drive %dn", drive);
- DPRINT("jiffies=%lun", jiffies);
- DPRINT("disk change line=%xn", fd_inb(FD_DIR) & 0x80);
- DPRINT("flags=%lxn", 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 changen");
- current_type[drive] = NULL;
- floppy_sizes[TOMINOR(drive)] = MAX_DISK_SIZE << 1;
- }
- /*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_dorn");
- }
- #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;
- }
- }
- /*
- * We should propagate failures to grab the resources back
- * nicely from here. Actually we ought to rewrite the fd
- * driver some day too.
- */
- 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 valuen");
- 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, int line)
- {
- if (!usage_count) {
- printk(KERN_ERR
- "Trying to lock fdc while usage count=0 at line %dn",
- line);
- return -1;
- }
- if (floppy_grab_irq_and_dma() == -1)
- return -EBUSY;
- if (test_and_set_bit(0, &fdc_busy)) {
- DECLARE_WAITQUEUE(wait, current);
- add_wait_queue(&fdc_wait, &wait);
- for (;;) {
- set_current_state(TASK_INTERRUPTIBLE);
- if (!test_and_set_bit(0, &fdc_busy))
- break;
- schedule();
- if (!NO_SIGNAL) {
- remove_wait_queue(&fdc_wait, &wait);
- return -EINTR;
- }
- }
- set_current_state(TASK_RUNNING);
- remove_wait_queue(&fdc_wait, &wait);
- }
- command_status = FD_COMMAND_NONE;
- __reschedule_timeout(drive, "lock fdc", 0);
- set_fdc(drive);
- return 0;
- }
- #define lock_fdc(drive,interruptible) _lock_fdc(drive,interruptible, __LINE__)
- #define LOCK_FDC(drive,interruptible)
- if (lock_fdc(drive,interruptible)) return -EINTR;
- /* unlocks the driver */
- static inline void unlock_fdc(void)
- {
- unsigned long flags;
- raw_cmd = NULL;
- if (!test_bit(0, &fdc_busy))
- DPRINT("FDC access conflict!n");
- if (do_floppy)
- DPRINT("device interrupt still active at FDC release: %p!n",
- do_floppy);
- command_status = FD_COMMAND_NONE;
- spin_lock_irqsave(&floppy_lock, flags);
- del_timer(&fd_timeout);
- cont = NULL;
- clear_bit(0, &fdc_busy);
- if (elv_next_request(floppy_queue))
- do_fd_request(floppy_queue);
- spin_unlock_irqrestore(&floppy_lock, flags);
- 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);
- }
- /* 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 DECLARE_WORK(floppy_work, NULL, NULL);
- static void schedule_bh(void (*handler) (void))
- {
- PREPARE_WORK(&floppy_work, (void (*)(void *))handler, NULL);
- schedule_work(&floppy_work);
- }
- static DEFINE_TIMER(fd_timer, NULL, 0, 0);
- static void cancel_activity(void)
- {
- unsigned long flags;
- spin_lock_irqsave(&floppy_lock, flags);
- do_floppy = NULL;
- PREPARE_WORK(&floppy_work, (void *)empty, NULL);
- del_timer(&fd_timer);
- spin_unlock_irqrestore(&floppy_lock, flags);
- }
- /* 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 watchdogn");
- }
- #endif
- if (disk_change(current_drive)) {
- DPRINT("disk removed during i/on");
- 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 fd_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 DEFINE_SPINLOCK(floppy_hlt_lock);
- static int hlt_disabled;
- static void floppy_disable_hlt(void)
- {
- unsigned long flags;
- spin_lock_irqsave(&floppy_hlt_lock, flags);
- if (!hlt_disabled) {
- hlt_disabled = 1;
- #ifdef HAVE_DISABLE_HLT
- disable_hlt();
- #endif
- }
- spin_unlock_irqrestore(&floppy_hlt_lock, flags);
- }
- static void floppy_enable_hlt(void)
- {
- unsigned long flags;
- spin_lock_irqsave(&floppy_hlt_lock, flags);
- if (hlt_disabled) {
- hlt_disabled = 0;
- #ifdef HAVE_DISABLE_HLT
- enable_hlt();
- #endif
- }
- spin_unlock_irqrestore(&floppy_hlt_lock, flags);
- }
- static void setup_DMA(void)
- {
- unsigned long f;
- #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 (((unsigned long)raw_cmd->kernel_data) % 512) {
- printk("non aligned address: %pn", raw_cmd->kernel_data);
- cont->done(0);
- FDCS->reset = 1;
- return;
- }
- #endif
- f = claim_dma_lock();
- fd_disable_dma();
- #ifdef fd_dma_setup
- if (fd_dma_setup(raw_cmd->kernel_data, raw_cmd->length,
- (raw_cmd->flags & FD_RAW_READ) ?
- DMA_MODE_READ : DMA_MODE_WRITE, FDCS->address) < 0) {
- release_dma_lock(f);
- cont->done(0);
- FDCS->reset = 1;
- return;
- }
- release_dma_lock(f);
- #else
- 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(raw_cmd->kernel_data);
- fd_set_dma_count(raw_cmd->length);
- virtual_dma_port = FDCS->address;
- fd_enable_dma();
- release_dma_lock(f);
- #endif
- floppy_disable_hlt();
- }
- static 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 %dn", 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=%xn",
- 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 = 0;
- 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=%dn",
- 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;
- 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 enabledn"); */
- }
- 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;
- if (slow_floppy) {
- srt = srt / 4;
- }
- 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 (fd_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 protectedn");
- 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 - retryingn");
- 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 pollingn");
- 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 (fd_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)
- do_floppy = main_command_interrupt;
- r = 0;
- for (i = 0; i < raw_cmd->cmd_count; i++)
- r |= output_byte(raw_cmd->cmd[i]);
- debugt("rw_command: ");
- 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)
- {
- debugt("seek interrupt:");
- if (inr != 2 || (ST0 & 0xF8) != 0x20) {
- DPRINT("seek failedn");
- 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 seekn");
- DPRINT("jiffies=%lun", 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 protectedn");
- DPRINT("wp=%xn", 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 seekn");
- }
- #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;
- }
- }
- do_floppy = seek_interrupt;
- output_byte(FD_SEEK);
- output_byte(UNIT(current_drive));
- LAST_OUT(track);
- debugt("seek command:");
- }
- static void recal_interrupt(void)
- {
- debugt("recal interrupt:");
- if (inr != 2)
- FDCS->reset = 1;
- else if (ST0 & ST0_ECE) {
- switch (DRS->track) {
- case NEED_1_RECAL:
- debugt("recal interrupt need 1 recal:");
- /* 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:
- debugt("recal interrupt need 2 recal:");
- /* 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 recalibraten");
- }
- #endif
- CLEARF(FD_DISK_NEWCHANGE);
- DRS->select_date = jiffies;
- /* fall through */
- default:
- debugt("recal interrupt default:");
- /* 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. Note that this can be called externally on the Sparc */
- irqreturn_t floppy_interrupt(int irq, void *dev_id, struct pt_regs *regs)
- {
- void (*handler) (void) = do_floppy;
- int do_print;
- unsigned long f;
- lasthandler = handler;
- interruptjiffies = jiffies;
- f = claim_dma_lock();
- fd_disable_dma();
- release_dma_lock(f);
- floppy_enable_hlt();
- do_floppy = NULL;
- if (fdc >= N_FDC || FDCS->address == -1) {
- /* we don't even know which FDC is the culprit */
- printk("DOR0=%xn", fdc_state[0].dor);
- printk("floppy interrupt on bizarre fdc %dn", fdc);
- printk("handler=%pn", handler);
- is_alive("bizarre fdc");
- return IRQ_NONE;
- }
- 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) {
- FDCS->reset = 1;
- return IRQ_NONE;
- }
- schedule_bh(handler);
- is_alive("normal interrupt end");
- /* FIXME! Was it really for us? */
- return IRQ_HANDLED;
- }
- static void recalibrate_floppy(void)
- {
- debugt("recalibrate floppy:");
- do_floppy = 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)
- {
- debugt("reset interrupt:");
- result(); /* get the status ready for set_fdc */
- if (FDCS->reset) {
- printk("reset set in interrupt, calling %pn", 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)
- {
- unsigned long flags;
- do_floppy = reset_interrupt;
- FDCS->reset = 0;
- reset_fdc_info(0);
- /* Pseudo-DMA may intercept 'reset finished' interrupt. */
- /* Irrelevant for systems with true DMA (i386). */
- flags = claim_dma_lock();
- fd_disable_dma();
- release_dma_lock(flags);
- 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);
- }
- }
- static void show_floppy(void)
- {
- int i;
- printk("n");
- printk("floppy driver staten");
- printk("-------------------n");
- printk("now=%lu last interrupt=%lu diff=%lu last called handler=%pn",
- jiffies, interruptjiffies, jiffies - interruptjiffies,
- lasthandler);
- #ifdef FLOPPY_SANITY_CHECK
- printk("timeout_message=%sn", timeout_message);
- printk("last output bytes:n");
- for (i = 0; i < OLOGSIZE; i++)
- printk("%2x %2x %lun",
- 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 %lun", resultjiffies);
- printk("last redo_fd_request at %lun", lastredo);
- for (i = 0; i < resultsize; i++) {
- printk("%2x ", reply_buffer[i]);
- }
- printk("n");
- #endif
- printk("status=%xn", fd_inb(FD_STATUS));
- printk("fdc_busy=%lun", fdc_busy);
- if (do_floppy)
- printk("do_floppy=%pn", do_floppy);
- if (floppy_work.pending)
- printk("floppy_work.func=%pn", floppy_work.func);
- if (timer_pending(&fd_timer))
- printk("fd_timer.function=%pn", fd_timer.function);
- if (timer_pending(&fd_timeout)) {
- printk("timer_function=%pn", fd_timeout.function);
- printk("expires=%lun", fd_timeout.expires - jiffies);
- printk("now=%lun", jiffies);
- }
- printk("cont=%pn", cont);
- printk("current_req=%pn", current_req);
- printk("command_status=%dn", command_status);
- printk("n");
- }
- static void floppy_shutdown(unsigned long data)
- {
- unsigned long flags;
- if (!initialising)
- show_floppy();
- cancel_activity();
- floppy_enable_hlt();
- flags = claim_dma_lock();
- fd_disable_dma();
- release_dma_lock(flags);
- /* avoid dma going to a random drive after shutdown */
- if (!initialising)
- DPRINT("floppy timeout calledn");
- 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 (fd_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_readyn");
- }
- #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 */
- #ifdef fd_chose_dma_mode
- if ((raw_cmd->flags & FD_RAW_READ) || (raw_cmd->flags & FD_RAW_WRITE)) {
- unsigned long flags = claim_dma_lock();
- fd_chose_dma_mode(raw_cmd->kernel_data, raw_cmd->length);
- release_dma_lock(flags);
- }
- #endif
- 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 {
- if ((raw_cmd->flags & FD_RAW_READ) ||
- (raw_cmd->flags & FD_RAW_WRITE))
- fdc_specify();
- setup_rw_floppy();
- }
- }
- static void floppy_start(void)
- {
- reschedule_timeout(current_reqD, "floppy start", 0);
- scandrives();
- #ifdef DCL_DEBUG
- if (DP->flags & FD_DEBUG) {
- DPRINT("setting NEWCHANGE in floppy_startn");
- }
- #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 = NULL;
- command_status += 2;
- wake_up(&command_done);
- }
- static struct cont_t wakeup_cont = {
- .interrupt = empty,
- .redo = do_wakeup,
- .error = empty,
- .done = (done_f) empty
- };
- static struct cont_t intr_cont = {
- .interrupt = empty,
- .redo = process_fd_request,
- .error = empty,
- .done = (done_f) empty
- };
- static int wait_til_done(void (*handler) (void), int interruptible)
- {
- int ret;
- schedule_bh(handler);
- if (command_status < 2 && NO_SIGNAL) {
- DECLARE_WAITQUEUE(wait, current);
- add_wait_queue(&command_done, &wait);
- for (;;) {
- set_current_state(interruptible ?
- TASK_INTERRUPTIBLE :
- TASK_UNINTERRUPTIBLE);
- if (command_status >= 2 || !NO_SIGNAL)
- break;
- is_alive("wait_til_done");
- schedule();
- }
- set_current_state(TASK_RUNNING);
- remove_wait_queue(&command_done, &wait);
- }
- if (command_status < 2) {
- cancel_activity();
- cont = &intr_cont;
- reset_fdc();
- return -EINTR;
- }
- 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)
- {
- int err_count;
- if (probing) {
- DRS->probed_format++;
- if (!next_valid_format())
- return;
- }
- err_count = ++(*errors);
- INFBOUND(DRWE->badness, err_count);
- if (err_count > DP->max_errors.abort)
- cont->done(0);
- if (err_count > DP->max_errors.reset)
- FDCS->reset = 1;
- else if (err_count > DP->max_errors.recal)
- DRS->track = NEED_2_RECAL;
- }
- static void set_floppy(int drive)
- {
- int type = ITYPE(UDRS->fd_device);
- if (type)
- _floppy = floppy_type + type;
- else
- _floppy = current_type[drive];
- }
- /*
- * 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;
- }
- }
- }
- if (_floppy->stretch & FD_ZEROBASED) {
- for (count = 0; count < F_SECT_PER_TRACK; count++)
- here[count].sect--;
- }
- }
- static void redo_format(void)
- {
- buffer_track = -1;
- setup_format_params(format_req.track << STRETCH(_floppy));
- floppy_start();
- debugt("queue format request");
- }
- static struct cont_t format_cont = {
- .interrupt = format_interrupt,
- .redo = redo_format,
- .error = bad_flp_intr,
- .done = generic_done
- };
- static int do_format(int drive, struct format_descr *tmp_format_req)
- {
- int ret;
- LOCK_FDC(drive, 1);
- set_floppy(drive);
- 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
- * =============================
- */
- static void floppy_end_request(struct request *req, int uptodate)
- {
- unsigned int nr_sectors = current_count_sectors;
- /* current_count_sectors can be zero if transfer failed */
- if (!uptodate)
- nr_sectors = req->current_nr_sectors;
- if (end_that_request_first(req, uptodate, nr_sectors))
- return;
- add_disk_randomness(req->rq_disk);
- floppy_off((long)req->rq_disk->private_data);
- blkdev_dequeue_request(req);
- end_that_request_last(req);
- /* We're done with the request */
- current_req = NULL;
- }
- /* new request_done. Can handle physical sectors which are smaller than a
- * logical buffer */
- static void request_done(int uptodate)
- {
- struct request_queue *q = floppy_queue;
- struct request *req = current_req;
- unsigned long flags;
- int block;
- probing = 0;
- reschedule_timeout(MAXTIMEOUT, "request done %d", uptodate);
- if (!req) {
- printk("floppy.c: no request in request_donen");
- return;
- }
- if (uptodate) {
- /* maintain values for invalidation on geometry
- * change */
- block = current_count_sectors + req->sector;
- INFBOUND(DRS->maxblock, block);
- if (block > _floppy->sect)
- DRS->maxtrack = 1;
- /* unlock chained buffers */
- spin_lock_irqsave(q->queue_lock, flags);
- floppy_end_request(req, 1);
- spin_unlock_irqrestore(q->queue_lock, flags);
- } else {
- if (rq_data_dir(req) == WRITE) {
- /* record write error information */
- DRWE->write_errors++;
- if (DRWE->write_errors == 1) {
- DRWE->first_error_sector = req->sector;
- DRWE->first_error_generation = DRS->generation;
- }
- DRWE->last_error_sector = req->sector;
- DRWE->last_error_generation = DRS->generation;
- }
- spin_lock_irqsave(q->queue_lock, flags);
- floppy_end_request(req, 0);
- spin_unlock_irqrestore(q->queue_lock, flags);
- }
- }
- /* Interrupt handler evaluating the result of the r/w operation */
- static void rw_interrupt(void)
- {
- int nr_sectors, ssize, eoc, heads;
- if (R_HEAD >= 2) {
- /* some Toshiba floppy controllers occasionnally seem to
- * return bogus interrupts after read/write operations, which
- * can be recognized by a bad head number (>= 2) */
- return;
- }
- 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 %lxn",
- nr_sectors, current_count_sectors);
- printk("rs=%d s=%dn", R_SECTOR, SECTOR);
- printk("rh=%d h=%dn", R_HEAD, HEAD);
- printk("rt=%d t=%dn", R_TRACK, TRACK);
- printk("heads=%d eoc=%dn", heads, eoc);
- printk("spt=%d st=%d ss=%dn", SECT_PER_TRACK,
- fsector_t, ssize);
- printk("in_sector_offset=%dn", 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;
- break;
- }
- if (probing) {
- if (DP->flags & FTD_MSG)
- DPRINT("Auto-detected floppy type %s in fd%dn",
- _floppy->name, current_drive);
- current_type[current_drive] = _floppy;
- floppy_sizes[TOMINOR(current_drive)] = _floppy->size;
- probing = 0;
- }
- if (CT(COMMAND) != FD_READ ||
- raw_cmd->kernel_data == current_req->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 + fsector_t);
- }
- cont->redo();
- }
- /* Compute maximal contiguous buffer size. */
- static int buffer_chain_size(void)
- {
- struct bio *bio;
- struct bio_vec *bv;
- int size, i;
- char *base;
- base = bio_data(current_req->bio);
- size = 0;
- rq_for_each_bio(bio, current_req) {
- bio_for_each_segment(bv, bio, i) {
- if (page_address(bv->bv_page) + bv->bv_offset !=
- base + size)
- break;
- size += bv->bv_len;
- }
- }
- return size >> 9;
- }
- /* Compute the maximal transfer size */
- static int transfer_size(int ssize, int max_sector, int max_size)
- {
- SUPBOUND(max_sector, fsector_t + max_size);
- /* alignment */
- max_sector -= (max_sector % _floppy->sect) % ssize;
- /* transfer size, beginning not aligned */
- current_count_sectors = max_sector - fsector_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 bio_vec *bv;
- struct bio *bio;
- char *buffer, *dma_buffer;
- int size, i;
- max_sector = transfer_size(ssize,
- min(max_sector, max_sector_2),
- current_req->nr_sectors);
- if (current_count_sectors <= 0 && CT(COMMAND) == FD_WRITE &&
- buffer_max > fsector_t + current_req->nr_sectors)
- current_count_sectors = min_t(int, buffer_max - fsector_t,
- current_req->nr_sectors);
- remaining = current_count_sectors << 9;
- #ifdef FLOPPY_SANITY_CHECK
- if ((remaining >> 9) > current_req->nr_sectors &&
- CT(COMMAND) == FD_WRITE) {
- DPRINT("in copy buffern");
- printk("current_count_sectors=%ldn", current_count_sectors);
- printk("remaining=%dn", remaining >> 9);
- printk("current_req->nr_sectors=%ldn",
- current_req->nr_sectors);
- printk("current_req->current_nr_sectors=%un",
- current_req->current_nr_sectors);
- printk("max_sector=%dn", max_sector);
- printk("ssize=%dn", ssize);
- }
- #endif
- buffer_max = max(max_sector, buffer_max);
- dma_buffer = floppy_track_buffer + ((fsector_t - buffer_min) << 9);
- size = current_req->current_nr_sectors << 9;
- rq_for_each_bio(bio, current_req) {
- bio_for_each_segment(bv, bio, i) {
- if (!remaining)
- break;
- size = bv->bv_len;
- SUPBOUND(size, remaining);
- buffer = page_address(bv->bv_page) + bv->bv_offset;
- #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 %dn",
- (int)((floppy_track_buffer -
- dma_buffer) >> 9));
- printk("fsector_t=%d buffer_min=%dn",
- fsector_t, buffer_min);
- printk("current_count_sectors=%ldn",
- current_count_sectors);
- if (CT(COMMAND) == FD_READ)
- printk("readn");
- if (CT(COMMAND) == FD_WRITE)
- printk("writen");
- break;
- }
- if (((unsigned long)buffer) % 512)
- DPRINT("%p buffer not alignedn", buffer);
- #endif
- if (CT(COMMAND) == FD_READ)
- memcpy(buffer, dma_buffer, size);
- else
- memcpy(dma_buffer, buffer, size);
- remaining -= size;
- dma_buffer += size;
- }
- }
- #ifdef FLOPPY_SANITY_CHECK
- if (remaining) {
- if (remaining > 0)
- max_sector -= remaining >> 9;
- DPRINT("weirdness: remaining %dn", remaining >> 9);
- }
- #endif
- }
- #if 0
- static inline int check_dma_crossing(char *start,
- unsigned long length, char *message)
- {
- if (CROSS_64KB(start, length)) {
- printk("DMA xfer crosses 64KB boundary in %s %p-%pn",
- message, start, start + length);
- return 1;
- } else
- return 0;
- }
- #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 > %dn",
- 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;
- if (max_buffer_sectors == 0) {
- printk("VFS: Block I/O scheduled on unopened devicen");
- return 0;
- }
- set_fdc((long)current_req->rq_disk->private_data);
- 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 (rq_data_dir(current_req) == READ) {
- raw_cmd->flags |= FD_RAW_READ;
- COMMAND = FM_MODE(_floppy, FD_READ);
- } else if (rq_data_dir(current_req) == WRITE) {
- raw_cmd->flags |= FD_RAW_WRITE;
- COMMAND = FM_MODE(_floppy, FD_WRITE);
- } else {
- DPRINT("make_raw_rw_request: unknown commandn");
- return 0;
- }
- max_sector = _floppy->sect * _floppy->head;
- TRACK = (int)current_req->sector / max_sector;
- fsector_t = (int)current_req->sector % max_sector;
- if (_floppy->track && TRACK >= _floppy->track) {
- if (current_req->current_nr_sectors & 1) {
- current_count_sectors = 1;
- return 1;
- } else
- return 0;
- }
- HEAD = fsector_t / _floppy->sect;
- if (((_floppy->stretch & (FD_SWAPSIDES | FD_ZEROBASED)) ||
- TESTF(FD_NEED_TWADDLE)) && fsector_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 (fsector_t >= max_sector) {
- current_count_sectors =
- min_t(int, _floppy->sect - fsector_t,
- current_req->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 = ((fsector_t % _floppy->sect) << 2 >> SIZECODE) +
- ((_floppy->stretch & FD_ZEROBASED) ? 0 : 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 <= fsector_t % _floppy->sect)
- SECTOR--;
- /* if we are beyond tracksize, fill up using smaller sectors */
- while (tracksize <= fsector_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 = (fsector_t % _floppy->sect) % ssize;
- aligned_sector_t = fsector_t - in_sector_offset;
- max_size = current_req->nr_sectors;
- if ((raw_cmd->track == buffer_track) &&
- (current_drive == buffer_drive) &&
- (fsector_t >= buffer_min) && (fsector_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_req->nr_sectors < ssize) {
- if (CT(COMMAND) == FD_WRITE) {
- if (fsector_t + current_req->nr_sectors > ssize &&
- fsector_t + current_req->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_req->buffer < MAX_DMA_ADDRESS) {
- unsigned long dma_limit;
- int direct, indirect;
- indirect =
- transfer_size(ssize, max_sector,
- max_buffer_sectors * 2) - fsector_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_req->buffer)) >> 9;
- if ((unsigned long)max_size > dma_limit) {
- max_size = dma_limit;
- }
- /* 64 kb boundaries */
- if (CROSS_64KB(current_req->buffer, max_size << 9))
- max_size = (K_64 -
- ((unsigned long)current_req->buffer) %
- K_64) >> 9;
- direct = transfer_size(ssize, max_sector, max_size) - fsector_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_req->nr_sectors;
- } else {
- raw_cmd->kernel_data = current_req->buffer;
- raw_cmd->length = current_count_sectors << 9;
- if (raw_cmd->length == 0) {
- DPRINT
- ("zero dma transfer attempted from make_raw_requestn");
- DPRINT("indirect=%d direct=%d fsector_t=%d",
- indirect, direct, fsector_t);
- return 0;
- }
- /* check_dma_crossing(raw_cmd->kernel_data,
- raw_cmd->length,
- "end of make_raw_request [1]");*/
- 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 */
- fsector_t > buffer_max ||
- fsector_t < buffer_min ||
- ((CT(COMMAND) == FD_READ ||
- (!in_sector_offset && current_req->nr_sectors >= ssize)) &&
- max_sector > 2 * max_buffer_sectors + buffer_min &&
- max_size + fsector_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 writen");
- #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
- /*check_dma_crossing(raw_cmd->kernel_data, raw_cmd->length,
- "end of make_raw_request"); */
- if ((raw_cmd->length < current_count_sectors << 9) ||
- (raw_cmd->kernel_data != current_req->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=%lxn",
- raw_cmd->length, current_count_sectors);
- if (raw_cmd->kernel_data != current_req->buffer)
- printk("addr=%d, length=%ldn",
- (int)((raw_cmd->kernel_data -
- floppy_track_buffer) >> 9),
- current_count_sectors);
- printk("st=%d ast=%d mse=%d msi=%dn",
- fsector_t, aligned_sector_t, max_sector, max_size);
- printk("ssize=%x SIZECODE=%dn", ssize, SIZECODE);
- printk("command=%x SECTOR=%d HEAD=%d, TRACK=%dn",
- COMMAND, SECTOR, HEAD, TRACK);
- printk("buffer drive=%dn", buffer_drive);
- printk("buffer track=%dn", buffer_track);
- printk("buffer_min=%dn", buffer_min);
- printk("buffer_max=%dn", buffer_max);
- return 0;
- }
- if (raw_cmd->kernel_data != current_req->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 dman");
- printk("fsector_t=%d buffer_min=%d current_count=%ldn",
- fsector_t, buffer_min, raw_cmd->length >> 9);
- printk("current_count_sectors=%ldn",
- current_count_sectors);
- if (CT(COMMAND) == FD_READ)
- printk("readn");
- if (CT(COMMAND) == FD_WRITE)
- printk("writen");
- return 0;
- }
- } else if (raw_cmd->length > current_req->nr_sectors << 9 ||
- current_count_sectors > current_req->nr_sectors) {
- DPRINT("buffer overrun in direct transfern");
- return 0;
- } else if (raw_cmd->length < current_count_sectors << 9) {
- DPRINT("more sectors than bytesn");
- printk("bytes=%ldn", raw_cmd->length >> 9);
- printk("sectors=%ldn", current_count_sectors);
- }
- if (raw_cmd->length == 0) {
- DPRINT("zero dma transfer attempted from make_raw_requestn");
- return 0;
- }
- #endif
- virtualdmabug_workaround();
- return 2;
- }
- static void redo_fd_request(void)
- {
- #define REPEAT {request_done(0); continue; }
- int drive;
- int tmp;
- lastredo = jiffies;
- if (current_drive < N_DRIVE)
- floppy_off(current_drive);
- for (;;) {
- if (!current_req) {
- struct request *req;
- spin_lock_irq(floppy_queue->queue_lock);
- req = elv_next_request(floppy_queue);
- spin_unlock_irq(floppy_queue->queue_lock);
- if (!req) {
- do_floppy = NULL;
- unlock_fdc();
- return;
- }
- current_req = req;
- }
- drive = (long)current_req->rq_disk->private_data;
- set_fdc(drive);
- reschedule_timeout(current_reqD, "redo fd request", 0);
- set_floppy(drive);
- 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 operationn");
- REPEAT;
- }
- if (!_floppy) { /* Autodetection */
- if (!probing) {
- DRS->probed_format = 0;
- if (next_valid_format()) {
- DPRINT("no autodetectable formatsn");
- _floppy = NULL;
- REPEAT;
- }
- }
- probing = 1;
- _floppy =
- floppy_type + DP->autodetect[DRS->probed_format];
- } else
- probing = 0;
- errors = &(current_req->errors);
- tmp = make_raw_rw_request();
- if (tmp < 2) {
- request_done(tmp);
- continue;
- }
- if (TESTF(FD_NEED_TWADDLE))
- twaddle();
- schedule_bh(floppy_start);
- debugt("queue fd request");
- return;
- }
- #undef REPEAT
- }
- static struct cont_t rw_cont = {
- .interrupt = rw_interrupt,
- .redo = redo_fd_request,
- .error = bad_flp_intr,
- .done = request_done
- };
- static void process_fd_request(void)
- {
- cont = &rw_cont;
- schedule_bh(redo_fd_request);
- }
- static void do_fd_request(request_queue_t * q)
- {
- if (max_buffer_sectors == 0) {
- printk("VFS: do_fd_request called on non-open devicen");
- return;
- }
- if (usage_count == 0) {
- printk("warning: usage count=0, current_req=%p exitingn",
- current_req);
- printk("sect=%ld flags=%lxn", (long)current_req->sector,
- current_req->flags);
- return;
- }
- if (test_bit(0, &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 = {
- .interrupt = success_and_wakeup,
- .redo = floppy_ready,
- .error = generic_failure,
- .done = 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_driven");
- }
- #endif
- SETF(FD_DISK_NEWCHANGE);
- WAIT(floppy_ready);
- return ret;
- }
- /*
- * User triggered reset
- * ====================
- */
- static void reset_intr(void)
- {
- printk("weird, reset interrupt calledn");
- }
- static struct cont_t reset_cont = {
- .interrupt = reset_intr,
- .redo = success_and_wakeup,
- .error = generic_failure,
- .done = 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 inline int fd_copyout(void __user *param, const void *address,
- unsigned long size)
- {
- return copy_to_user(param, address, size) ? -EFAULT : 0;
- }
- static inline int fd_copyin(void __user *param, void *address, unsigned long size)
- {
- return copy_from_user(address, param, size) ? -EFAULT : 0;
- }
- #define _COPYOUT(x) (copy_to_user((void __user *)param, &(x), sizeof(x)) ? -EFAULT : 0)
- #define _COPYIN(x) (copy_from_user(&(x), (void __user *)param, sizeof(x)) ? -EFAULT : 0)
- #define COPYOUT(x) ECALL(_COPYOUT(x))
- #define COPYIN(x) ECALL(_COPYIN(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;
- if (raw_cmd->reply_count > MAX_REPLIES)
- raw_cmd->reply_count = 0;
- 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)) {
- unsigned long flags;
- flags = claim_dma_lock();
- raw_cmd->length = fd_get_dma_residue();
- release_dma_lock(flags);
- }
- 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 = {
- .interrupt = success_and_wakeup,
- .redo = floppy_start,
- .error = generic_failure,
- .done = raw_cmd_done
- };
- static inline int raw_cmd_copyout(int cmd, char __user *param,
- struct floppy_raw_cmd *ptr)
- {
- int ret;
- while (ptr) {
- 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 = NULL;
- 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 __user *param,
- struct floppy_raw_cmd **rcmd)
- {
- struct floppy_raw_cmd *ptr;
- int ret;
- int i;
- *rcmd = NULL;
- while (1) {
- ptr = (struct floppy_raw_cmd *)
- kmalloc(sizeof(struct floppy_raw_cmd), GFP_USER);
- if (!ptr)
- return -ENOMEM;
- *rcmd = ptr;
- COPYIN(*ptr);
- ptr->next = NULL;
- 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 = NULL;
- 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);
- fallback_on_nodma_alloc(&ptr->kernel_data, ptr->length);
- if (!ptr->kernel_data)
- return -ENOMEM;
- ptr->buffer_length = 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 __user *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 ioctln");
- }
- #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(struct block_device *bdev)
- {
- /* invalidate the buffer track to force a reread */
- set_bit((long)bdev->bd_disk->private_data, &fake_change);
- process_fd_request();
- check_disk_change(bdev);
- return 0;
- }
- static inline int set_geometry(unsigned int cmd, struct floppy_struct *g,
- int drive, int type, struct block_device *bdev)
- {
- 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 | FD_ZEROBASED)) != 0)
- return -EINVAL;
- if (type) {
- if (!capable(CAP_SYS_ADMIN))
- return -EPERM;
- down(&open_lock);
- LOCK_FDC(drive, 1);
- 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++) {
- struct block_device *bdev = opened_bdev[cnt];
- if (!bdev || ITYPE(drive_state[cnt].fd_device) != type)
- continue;
- __invalidate_device(bdev);
- }
- up(&open_lock);
- } else {
- int oldStretch;
- LOCK_FDC(drive, 1);
- if (cmd != FDDEFPRM)
- /* notice a disk change immediately, else
- * we lose our settings immediately*/
- CALL(poll_drive(1, FD_RAW_NEED_DISK));
- oldStretch = g->stretch;
- 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;
- 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 ||
- ((user_params[drive].sect ^ oldStretch) &
- (FD_SWAPSIDES | FD_ZEROBASED)))
- invalidate_drive(bdev);
- else
- process_fd_request();
- }
- return 0;
- }
- /* handle obsolete ioctl's */
- static int ioctl_table[] = {
- FDCLRPRM,
- FDSETPRM,
- FDDEFPRM,
- FDGETPRM,
- FDMSGON,
- FDMSGOFF,
- FDFMTBEG,
- FDFMTTRK,
- FDFMTEND,
- FDSETEMSGTRESH,
- FDFLUSH,
- FDSETMAXERRS,
- FDGETMAXERRS,
- FDGETDRVTYP,
- FDSETDRVPRM,
- FDGETDRVPRM,
- FDGETDRVSTAT,
- FDPOLLDRVSTAT,
- FDRESET,
- FDGETFDCSTAT,
- FDWERRORCLR,
- FDWERRORGET,
- FDRAWCMD,
- FDEJECT,
- FDTWADDLE
- };
- static inline int normalize_ioctl(int *cmd, int *size)
- {
- int i;
- for (i = 0; i < ARRAY_SIZE(ioctl_table); i++) {
- if ((*cmd & 0xffff) == (ioctl_table[i] & 0xffff)) {
- *size = _IOC_SIZE(*cmd);
- *cmd = ioctl_table[i];
- if (*size > _IOC_SIZE(*cmd)) {
- printk("ioctl not yet supportedn");
- return -EFAULT;
- }
- return 0;
- }
- }
- return -EINVAL;
- }
- static int get_floppy_geometry(int drive, int type, struct floppy_struct **g)
- {
- if (type)
- *g = &floppy_type[type];
- else {
- LOCK_FDC(drive, 0);
- CALL(poll_drive(0, 0));
- process_fd_request();
- *g = current_type[drive];
- }
- if (!*g)
- return -ENODEV;
- return 0;
- }
- static int fd_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
- unsigned long param)
- {
- #define FD_IOCTL_ALLOWED ((filp) && (filp)->private_data)
- #define OUT(c,x) case c: outparam = (const char *) (x); break
- #define IN(c,x,tag) case c: *(x) = inparam. tag ; return 0
- int drive = (long)inode->i_bdev->bd_disk->private_data;
- int i, type = ITYPE(UDRS->fd_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 */
- /* 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 ioctln");
- DPRINT("please use floppycontrol --ejectn");
- cmd = FDEJECT;
- }
- /* generic block device ioctls */
- switch (cmd) {
- /* the following have been inspired by the corresponding
- * code for other block devices. */
- struct floppy_struct *g;
- case HDIO_GETGEO:
- {
- struct hd_geometry loc;
- ECALL(get_floppy_geometry(drive, type, &g));
- loc.heads = g->head;
- loc.sectors = g->sect;
- loc.cylinders = g->track;
- loc.start = 0;
- return _COPYOUT(loc);
- }
- }
- /* convert the old style command into a new style command */
- if ((cmd & 0xff00) == 0x0200) {
- ECALL(normalize_ioctl(&cmd, &size));
- } else
- return -EINVAL;
- /* permission checks */
- if (((cmd & 0x40) && !FD_IOCTL_ALLOWED) ||
- ((cmd & 0x80) && !capable(CAP_SYS_ADMIN)))
- return -EPERM;
- /* copyin */
- CLEARSTRUCT(&inparam);
- if (_IOC_DIR(cmd) & _IOC_WRITE)
- ECALL(fd_copyin((void __user *)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 << 1;
- UDRS->keep_data = 0;
- return invalidate_drive(inode->i_bdev);
- case FDSETPRM:
- case FDDEFPRM:
- return set_geometry(cmd, &inparam.g,
- drive, type, inode->i_bdev);
- case FDGETPRM:
- ECALL(get_floppy_geometry(drive, type,
- (struct floppy_struct **)
- &outparam));
- 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(drive, &inparam.f);
- case FDFMTEND:
- case FDFLUSH:
- LOCK_FDC(drive, 1);
- return invalidate_drive(inode->i_bdev);
- 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 FDRAWCMD:
- if (type)
- return -EINVAL;
- LOCK_FDC(drive, 1);
- set_floppy(drive);
- CALL(i = raw_cmd_ioctl(cmd, (void __user *)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 __user *)param, outparam, size);
- else
- return 0;
- #undef OUT
- #undef IN
- }
- static void __init 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++) {
- unsigned int type = UDP->cmos;
- struct floppy_drive_params *params;
- const char *name = NULL;
- static char temparea[32];
- if (type < NUMBER(default_drive_params)) {
- params = &default_drive_params[type].params;
- if (type) {
- name = default_drive_params[type].name;
- allowed_drive_mask |= 1 << drive;
- } else
- allowed_drive_mask &= ~(1 << drive);
- } else {
- params = &default_drive_params[0].params;
- sprintf(temparea, "unknown type %d (usb?)", type);
- name = temparea;
- }
- if (name) {
- const char *prepend = ",";
- if (first) {
- prepend = KERN_INFO "Floppy drive(s):";
- first = 0;
- }
- printk("%s fd%d is %s", prepend, drive, name);
- register_devfs_entries(drive);
- }
- *UDP = *params;
- }
- if (!first)
- printk("n");
- }
- static int floppy_release(struct inode *inode, struct file *filp)
- {
- int drive = (long)inode->i_bdev->bd_disk->private_data;
- down(&open_lock);
- 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;
- }
- if (!UDRS->fd_ref)
- opened_bdev[drive] = NULL;
- floppy_release_irq_and_dma();
- up(&open_lock);
- return 0;
- }
- /*
- * floppy_open check for aliasing (/dev/fd0 can be the same as
- * /dev/PS0 etc), and disallows simultaneous access to the same
- * drive with different device numbers.
- */
- static int floppy_open(struct inode *inode, struct file *filp)
- {
- int drive = (long)inode->i_bdev->bd_disk->private_data;
- int old_dev;
- int try;
- int res = -EBUSY;
- char *tmp;
- filp->private_data = (void *)0;
- down(&open_lock);
- old_dev = UDRS->fd_device;
- if (opened_bdev[drive] && opened_bdev[drive] != inode->i_bdev)
- goto out2;
- 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)))
- goto out2;
- if (floppy_grab_irq_and_dma())
- goto out2;
- if (filp->f_flags & O_EXCL)
- UDRS->fd_ref = -1;
- else
- UDRS->fd_ref++;
- opened_bdev[drive] = inode->i_bdev;
- res = -ENXIO;
- 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 && !floppy_track_buffer) {
- try >>= 1; /* buffer only one side */
- INFBOUND(try, 16);
- tmp = (char *)fd_dma_mem_alloc(1024 * try);
- }
- if (!tmp && !floppy_track_buffer) {
- fallback_on_nodma_alloc(&tmp, 2048 * try);
- }
- if (!tmp && !floppy_track_buffer) {
- DPRINT("Unable to allocate DMA memoryn");
- goto out;
- }
- if (floppy_track_buffer) {
- if (tmp)
- 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 = iminor(inode);
- set_capacity(disks[drive], floppy_sizes[iminor(inode)]);
- if (old_dev != -1 && old_dev != iminor(inode)) {
- if (buffer_drive == drive)
- buffer_track = -1;
- }
- /* Allow ioctls if we have write-permissions even if read-only open.
- * Needed so that programs such as fdrawcmd still can work on write
- * protected disks */
- if (filp->f_mode & 2
- || permission(filp->f_dentry->d_inode, 2, NULL) == 0)
- filp->private_data = (void *)8;
- if (UFDCS->rawcmd == 1)
- UFDCS->rawcmd = 2;
- if (!(filp->f_flags & O_NDELAY)) {
- if (filp->f_mode & 3) {
- UDRS->last_checked = 0;
- check_disk_change(inode->i_bdev);
- if (UTESTF(FD_DISK_CHANGED))
- goto out;
- }
- res = -EROFS;
- if ((filp->f_mode & 2) && !(UTESTF(FD_DISK_WRITABLE)))
- goto out;
- }
- up(&open_lock);
- return 0;
- out:
- if (UDRS->fd_ref < 0)
- UDRS->fd_ref = 0;
- else
- UDRS->fd_ref--;
- if (!UDRS->fd_ref)
- opened_bdev[drive] = NULL;
- floppy_release_irq_and_dma();
- out2:
- up(&open_lock);
- return res;
- }
- /*
- * Check if the disk has been changed or if a change has been faked.
- */
- static int check_floppy_change(struct gendisk *disk)
- {
- int drive = (long)disk->private_data;
- if (UTESTF(FD_DISK_CHANGED) || UTESTF(FD_VERIFY))
- return 1;
- if (UDP->checkfreq < (int)(jiffies - UDRS->last_checked)) {
- if (floppy_grab_irq_and_dma()) {
- return 1;
- }
- lock_fdc(drive, 0);
- poll_drive(0, 0);
- process_fd_request();
- floppy_release_irq_and_dma();
- }
- if (UTESTF(FD_DISK_CHANGED) ||
- UTESTF(FD_VERIFY) ||
- test_bit(drive, &fake_change) ||
- (!ITYPE(UDRS->fd_device) && !current_type[drive]))
- return 1;
- return 0;
- }
- /*
- * This implements "read block 0" for floppy_revalidate().
- * Needed for format autodetection, checking whether there is
- * a disk in the drive, and whether that disk is writable.
- */
- static int floppy_rb0_complete(struct bio *bio, unsigned int bytes_done,
- int err)
- {
- if (bio->bi_size)
- return 1;
- complete((struct completion *)bio->bi_private);
- return 0;
- }
- static int __floppy_read_block_0(struct block_device *bdev)
- {
- struct bio bio;
- struct bio_vec bio_vec;
- struct completion complete;
- struct page *page;
- size_t size;
- page = alloc_page(GFP_NOIO);
- if (!page) {
- process_fd_request();
- return -ENOMEM;
- }
- size = bdev->bd_block_size;
- if (!size)
- size = 1024;
- bio_init(&bio);
- bio.bi_io_vec = &bio_vec;
- bio_vec.bv_page = page;
- bio_vec.bv_len = size;
- bio_vec.bv_offset = 0;
- bio.bi_vcnt = 1;
- bio.bi_idx = 0;
- bio.bi_size = size;
- bio.bi_bdev = bdev;
- bio.bi_sector = 0;
- init_completion(&complete);
- bio.bi_private = &complete;
- bio.bi_end_io = floppy_rb0_complete;
- submit_bio(READ, &bio);
- generic_unplug_device(bdev_get_queue(bdev));
- process_fd_request();
- wait_for_completion(&complete);
- __free_page(page);
- 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(struct gendisk *disk)
- {
- int drive = (long)disk->private_data;
- #define NO_GEOM (!current_type[drive] && !ITYPE(UDRS->fd_device))
- int cf;
- int res = 0;
- if (UTESTF(FD_DISK_CHANGED) ||
- UTESTF(FD_VERIFY) || test_bit(drive, &fake_change) || NO_GEOM) {
- if (usage_count == 0) {
- printk("VFS: revalidate called on non-open device.n");
- return -EFAULT;
- }
- 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 */
- res = __floppy_read_block_0(opened_bdev[drive]);
- } else {
- if (cf)
- poll_drive(0, FD_RAW_NEED_DISK);
- process_fd_request();
- }
- }
- set_capacity(disk, floppy_sizes[UDRS->fd_device]);
- return res;
- }
- static struct block_device_operations floppy_fops = {
- .owner = THIS_MODULE,
- .open = floppy_open,
- .release = floppy_release,
- .ioctl = fd_ioctl,
- .media_changed = check_floppy_change,
- .revalidate_disk = floppy_revalidate,
- };
- static char *table[] = {
- "", "d360", "h1200", "u360", "u720", "h360", "h720",
- "u1440", "u2880", "CompaQ", "h1440", "u1680", "h410",
- "u820", "h1476", "u1722", "h420", "u830", "h1494", "u1743",
- "h880", "u1040", "u1120", "h1600", "u1760", "u1920",
- "u3200", "u3520", "u3840", "u1840", "u800", "u1600",
- NULL
- };
- static int t360[] = { 1, 0 },
- t1200[] = { 2, 5, 6, 10, 12, 14, 16, 18, 20, 23, 0 },
- t3in[] = { 8, 9, 26, 27, 28, 7, 11, 15, 19, 24, 25, 29, 31, 3, 4, 13,
- 17, 21, 22, 30, 0 };
- static int *table_sup[] =
- { NULL, t360, t1200, t3in + 5 + 8, t3in + 5, t3in, t3in };
- static void __init register_devfs_entries(int drive)
- {
- int base_minor = (drive < 4) ? drive : (124 + drive);
- if (UDP->cmos < NUMBER(default_drive_params)) {
- int i = 0;
- do {
- int minor = base_minor + (table_sup[UDP->cmos][i] << 2);
- devfs_mk_bdev(MKDEV(FLOPPY_MAJOR, minor),
- S_IFBLK | S_IRUSR | S_IWUSR | S_IRGRP |
- S_IWGRP, "floppy/%d%s", drive,
- table[table_sup[UDP->cmos][i]]);
- } while (table_sup[UDP->cmos][i++]);
- }
- }
- /*
- * Floppy Driver initialization
- * =============================
- */
- /* Determine the floppy disk controller type */
- /* This routine was written by David C. Niemi */
- static char __init 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 8272An", 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 82072n", 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 82072An", 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 82077n", 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 82077n", 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 82078n", fdc);
- return FDC_82078;
- case 0x2:
- printk(KERN_INFO "FDC %d is a S82078Bn", fdc);
- return FDC_S82078B;
- case 0x3:
- printk(KERN_INFO "FDC %d is a National Semiconductor PC87306n",
- 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 */
- static void __init floppy_set_flags(int *ints, int param, int param2)
- {
- int i;
- for (i = 0; i < ARRAY_SIZE(default_drive_params); i++) {
- if (param)
- default_drive_params[i].params.flags |= param2;
- else
- default_drive_params[i].params.flags &= ~param2;
- }
- DPRINT("%s flag 0x%xn", param2 ? "Setting" : "Clearing", param);
- }
- static void __init daring(int *ints, int param, int param2)
- {
- 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 hardwaren", param ? "standard" : "broken");
- }
- static void __init set_cmos(int *ints, int dummy, int dummy2)
- {
- int current_drive = 0;
- if (ints[0] != 2) {
- DPRINT("wrong number of parameters for CMOSn");
- return;
- }
- current_drive = ints[1];
- if (current_drive < 0 || current_drive >= 8) {
- DPRINT("bad drive for set_cmosn");
- return;
- }
- #if N_FDC > 1
- if (current_drive >= 4 && !FDC2)
- FDC2 = 0x370;
- #endif
- DP->cmos = ints[2];
- DPRINT("setting CMOS code to %dn", ints[2]);
- }
- static struct param_table {
- const char *name;
- void (*fn) (int *ints, int param, int param2);
- int *var;
- int def_param;
- int param2;
- } config_params[] __initdata = {
- {"allowed_drive_mask", NULL, &allowed_drive_mask, 0xff, 0}, /* obsolete */
- {"all_drives", NULL, &allowed_drive_mask, 0xff, 0}, /* obsolete */
- {"asus_pci", NULL, &allowed_drive_mask, 0x33, 0},
- {"irq", NULL, &FLOPPY_IRQ, 6, 0},
- {"dma", NULL, &FLOPPY_DMA, 2, 0},
- {"daring", daring, NULL, 1, 0},
- #if N_FDC > 1
- {"two_fdc", NULL, &FDC2, 0x370, 0},
- {"one_fdc", NULL, &FDC2, 0, 0},
- #endif
- {"thinkpad", floppy_set_flags, NULL, 1, FD_INVERTED_DCL},
- {"broken_dcl", floppy_set_flags, NULL, 1, FD_BROKEN_DCL},
- {"messages", floppy_set_flags, NULL, 1, FTD_MSG},
- {"silent_dcl_clear", floppy_set_flags, NULL, 1, FD_SILENT_DCL_CLEAR},
- {"debug", floppy_set_flags, NULL, 1, FD_DEBUG},
- {"nodma", NULL, &can_use_virtual_dma, 1, 0},
- {"omnibook", NULL, &can_use_virtual_dma, 1, 0},
- {"yesdma", NULL, &can_use_virtual_dma, 0, 0},
- {"fifo_depth", NULL, &fifo_depth, 0xa, 0},
- {"nofifo", NULL, &no_fifo, 0x20, 0},
- {"usefifo", NULL, &no_fifo, 0, 0},
- {"cmos", set_cmos, NULL, 0, 0},
- {"slow", NULL, &slow_floppy, 1, 0},
- {"unexpected_interrupts", NULL, &print_unex, 1, 0},
- {"no_unexpected_interrupts", NULL, &print_unex, 0, 0},
- {"L40SX", NULL, &print_unex, 0, 0}
- EXTRA_FLOPPY_PARAMS
- };
- static int __init floppy_setup(char *str)
- {
- int i;
- int param;
- int ints[11];
- str = get_options(str, ARRAY_SIZE(ints), ints);
- 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,
- config_params[i].param2);
- if (config_params[i].var) {
- DPRINT("%s=%dn", str, param);
- *config_params[i].var = param;
- }
- return 1;
- }
- }
- }
- 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 optionn");
- DPRINT("Read Documentation/floppy.txtn");
- return 0;
- }
- static int have_no_fdc = -ENODEV;
- static ssize_t floppy_cmos_show(struct device *dev,
- struct device_attribute *attr, char *buf)
- {
- struct platform_device *p;
- int drive;
- p = container_of(dev, struct platform_device,dev);
- drive = p->id;
- return sprintf(buf, "%Xn", UDP->cmos);
- }
- DEVICE_ATTR(cmos,S_IRUGO,floppy_cmos_show,NULL);
- static void floppy_device_release(struct device *dev)
- {
- complete(&device_release);
- }
- static struct platform_device floppy_device[N_DRIVE];
- static struct kobject *floppy_find(dev_t dev, int *part, void *data)
- {
- int drive = (*part & 3) | ((*part & 0x80) >> 5);
- if (drive >= N_DRIVE ||
- !(allowed_drive_mask & (1 << drive)) ||
- fdc_state[FDC(drive)].version == FDC_NONE)
- return NULL;
- if (((*part >> 2) & 0x1f) >= NUMBER(floppy_type))
- return NULL;
- *part = 0;
- return get_disk(disks[drive]);
- }
- static int __init floppy_init(void)
- {
- int i, unit, drive;
- int err, dr;
- raw_cmd = NULL;
- for (dr = 0; dr < N_DRIVE; dr++) {
- disks[dr] = alloc_disk(1);
- if (!disks[dr]) {
- err = -ENOMEM;
- goto out_put_disk;
- }
- disks[dr]->major = FLOPPY_MAJOR;
- disks[dr]->first_minor = TOMINOR(dr);
- disks[dr]->fops = &floppy_fops;
- sprintf(disks[dr]->disk_name, "fd%d", dr);
- init_timer(&motor_off_timer[dr]);
- motor_off_timer[dr].data = dr;
- motor_off_timer[dr].function = motor_off_callback;
- }
- devfs_mk_dir("floppy");
- err = register_blkdev(FLOPPY_MAJOR, "fd");
- if (err)
- goto out_devfs_remove;
- floppy_queue = blk_init_queue(do_fd_request, &floppy_lock);
- if (!floppy_queue) {
- err = -ENOMEM;
- goto out_unreg_blkdev;
- }
- blk_queue_max_sectors(floppy_queue, 64);
- blk_register_region(MKDEV(FLOPPY_MAJOR, 0), 256, THIS_MODULE,
- floppy_find, NULL, NULL);
- for (i = 0; i < 256; i++)
- if (ITYPE(i))
- floppy_sizes[i] = floppy_type[ITYPE(i)].size;
- else
- floppy_sizes[i] = MAX_DISK_SIZE << 1;
- 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;
- #if defined(__sparc__) || defined(__mc68000__)
- /*sparcs/sun3x don't have a DOR reset which we can fall back on to */
- #ifdef __mc68000__
- if (MACH_IS_SUN3X)
- #endif
- FDCS->version = FDC_82072A;
- #endif
- }
- use_virtual_dma = can_use_virtual_dma & 1;
- #if defined(CONFIG_PPC64)
- if (check_legacy_ioport(FDC1)) {
- del_timer(&fd_timeout);
- err = -ENODEV;
- goto out_unreg_region;
- }
- #endif
- fdc_state[0].address = FDC1;
- if (fdc_state[0].address == -1) {
- del_timer(&fd_timeout);
- err = -ENODEV;
- goto out_unreg_region;
- }
- #if N_FDC > 1
- fdc_state[1].address = FDC2;
- #endif
- fdc = 0; /* reset fdc in case of unexpected interrupt */
- err = floppy_grab_irq_and_dma();
- if (err) {
- del_timer(&fd_timeout);
- err = -EBUSY;
- goto out_unreg_region;
- }
- /* initialise drive state */
- for (drive = 0; drive < N_DRIVE; drive++) {
- CLEARSTRUCT(UDRS);
- CLEARSTRUCT(UDRWE);
- USETF(FD_DISK_NEWCHANGE);
- USETF(FD_DISK_CHANGED);
- USETF(FD_VERIFY);
- UDRS->fd_device = -1;
- floppy_track_buffer = NULL;
- max_buffer_sectors = 0;
- }
- /*
- * Small 10 msec delay to let through any interrupt that
- * initialization might have triggered, to not
- * confuse detection:
- */
- msleep(10);
- 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)) {
- /* free ioports reserved by floppy_grab_irq_and_dma() */
- release_region(FDCS->address + 2, 4);
- release_region(FDCS->address + 7, 1);
- 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) {
- /* free ioports reserved by floppy_grab_irq_and_dma() */
- release_region(FDCS->address + 2, 4);
- release_region(FDCS->address + 7, 1);
- FDCS->address = -1;
- continue;
- }
- if (can_use_virtual_dma == 2 && FDCS->version < FDC_82072A)
- can_use_virtual_dma = 0;
- 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 foundn");
- err = have_no_fdc;
- goto out_flush_work;
- }
- for (drive = 0; drive < N_DRIVE; drive++) {
- if (!(allowed_drive_mask & (1 << drive)))
- continue;
- if (fdc_state[FDC(drive)].version == FDC_NONE)
- continue;
- floppy_device[drive].name = floppy_device_name;
- floppy_device[drive].id = drive;
- floppy_device[drive].dev.release = floppy_device_release;
- err = platform_device_register(&floppy_device[drive]);
- if (err)
- goto out_flush_work;
- device_create_file(&floppy_device[drive].dev,&dev_attr_cmos);
- /* to be cleaned up... */
- disks[drive]->private_data = (void *)(long)drive;
- disks[drive]->queue = floppy_queue;
- disks[drive]->flags |= GENHD_FL_REMOVABLE;
- disks[drive]->driverfs_dev = &floppy_device[drive].dev;
- add_disk(disks[drive]);
- }
- return 0;
- out_flush_work:
- flush_scheduled_work();
- if (usage_count)
- floppy_release_irq_and_dma();
- out_unreg_region:
- blk_unregister_region(MKDEV(FLOPPY_MAJOR, 0), 256);
- blk_cleanup_queue(floppy_queue);
- out_unreg_blkdev:
- unregister_blkdev(FLOPPY_MAJOR, "fd");
- out_devfs_remove:
- devfs_remove("floppy");
- out_put_disk:
- while (dr--) {
- del_timer(&motor_off_timer[dr]);
- put_disk(disks[dr]);
- }
- return err;
- }
- static DEFINE_SPINLOCK(floppy_usage_lock);
- static int floppy_grab_irq_and_dma(void)
- {
- unsigned long flags;
- spin_lock_irqsave(&floppy_usage_lock, flags);
- if (usage_count++) {
- spin_unlock_irqrestore(&floppy_usage_lock, flags);
- return 0;
- }
- spin_unlock_irqrestore(&floppy_usage_lock, flags);
- if (fd_request_irq()) {
- DPRINT("Unable to grab IRQ%d for the floppy drivern",
- FLOPPY_IRQ);
- spin_lock_irqsave(&floppy_usage_lock, flags);
- usage_count--;
- spin_unlock_irqrestore(&floppy_usage_lock, flags);
- return -1;
- }
- if (fd_request_dma()) {
- DPRINT("Unable to grab DMA%d for the floppy drivern",
- FLOPPY_DMA);
- fd_free_irq();
- spin_lock_irqsave(&floppy_usage_lock, flags);
- usage_count--;
- spin_unlock_irqrestore(&floppy_usage_lock, flags);
- return -1;
- }
- for (fdc = 0; fdc < N_FDC; fdc++) {
- if (FDCS->address != -1) {
- if (!request_region(FDCS->address + 2, 4, "floppy")) {
- DPRINT("Floppy io-port 0x%04lx in usen",
- FDCS->address + 2);
- goto cleanup1;
- }
- if (!request_region(FDCS->address + 7, 1, "floppy DIR")) {
- DPRINT("Floppy io-port 0x%04lx in usen",
- FDCS->address + 7);
- goto cleanup2;
- }
- /* address + 6 is reserved, and may be taken by IDE.
- * Unfortunately, Adaptec doesn't know this :-(, */
- }
- }
- for (fdc = 0; fdc < N_FDC; fdc++) {
- if (FDCS->address != -1) {
- reset_fdc_info(1);
- fd_outb(FDCS->dor, FD_DOR);
- }
- }
- fdc = 0;
- set_dor(0, ~0, 8); /* avoid immediate interrupt */
- for (fdc = 0; fdc < N_FDC; fdc++)
- if (FDCS->address != -1)
- fd_outb(FDCS->dor, FD_DOR);
- /*
- * The driver will try and free resources and relies on us
- * to know if they were allocated or not.
- */
- fdc = 0;
- irqdma_allocated = 1;
- return 0;
- cleanup2:
- release_region(FDCS->address + 2, 4);
- cleanup1:
- fd_free_irq();
- fd_free_dma();
- while (--fdc >= 0) {
- release_region(FDCS->address + 2, 4);
- release_region(FDCS->address + 7, 1);
- }
- spin_lock_irqsave(&floppy_usage_lock, flags);
- usage_count--;
- spin_unlock_irqrestore(&floppy_usage_lock, flags);
- return -1;
- }
- static void floppy_release_irq_and_dma(void)
- {
- int old_fdc;
- #ifdef FLOPPY_SANITY_CHECK
- #ifndef __sparc__
- int drive;
- #endif
- #endif
- long tmpsize;
- unsigned long tmpaddr;
- unsigned long flags;
- spin_lock_irqsave(&floppy_usage_lock, flags);
- if (--usage_count) {
- spin_unlock_irqrestore(&floppy_usage_lock, flags);
- return;
- }
- spin_unlock_irqrestore(&floppy_usage_lock, flags);
- if (irqdma_allocated) {
- fd_disable_dma();
- fd_free_dma();
- 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 = NULL;
- 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 (timer_pending(motor_off_timer + drive))
- printk("motor off timer %d still activen", drive);
- #endif
- if (timer_pending(&fd_timeout))
- printk("floppy timer still active:%sn", timeout_message);
- if (timer_pending(&fd_timer))
- printk("auxiliary floppy timer still activen");
- if (floppy_work.pending)
- printk("work still pendingn");
- #endif
- old_fdc = fdc;
- for (fdc = 0; fdc < N_FDC; fdc++)
- if (FDCS->address != -1) {
- release_region(FDCS->address + 2, 4);
- release_region(FDCS->address + 7, 1);
- }
- fdc = old_fdc;
- }
- #ifdef MODULE
- static char *floppy;
- static void unregister_devfs_entries(int drive)
- {
- int i;
- if (UDP->cmos < NUMBER(default_drive_params)) {
- i = 0;
- do {
- devfs_remove("floppy/%d%s", drive,
- table[table_sup[UDP->cmos][i]]);
- } while (table_sup[UDP->cmos][i++]);
- }
- }
- static void __init parse_floppy_cfg_string(char *cfg)
- {
- char *ptr;
- while (*cfg) {
- for (ptr = cfg; *cfg && *cfg != ' ' && *cfg != 't'; cfg++) ;
- if (*cfg) {
- *cfg = ' ';
- cfg++;
- }
- if (*ptr)
- floppy_setup(ptr);
- }
- }
- int init_module(void)
- {
- if (floppy)
- parse_floppy_cfg_string(floppy);
- return floppy_init();
- }
- void cleanup_module(void)
- {
- int drive;
- init_completion(&device_release);
- blk_unregister_region(MKDEV(FLOPPY_MAJOR, 0), 256);
- unregister_blkdev(FLOPPY_MAJOR, "fd");
- for (drive = 0; drive < N_DRIVE; drive++) {
- del_timer_sync(&motor_off_timer[drive]);
- if ((allowed_drive_mask & (1 << drive)) &&
- fdc_state[FDC(drive)].version != FDC_NONE) {
- del_gendisk(disks[drive]);
- unregister_devfs_entries(drive);
- device_remove_file(&floppy_device[drive].dev, &dev_attr_cmos);
- platform_device_unregister(&floppy_device[drive]);
- }
- put_disk(disks[drive]);
- }
- devfs_remove("floppy");
- del_timer_sync(&fd_timeout);
- del_timer_sync(&fd_timer);
- blk_cleanup_queue(floppy_queue);
- if (usage_count)
- floppy_release_irq_and_dma();
- /* eject disk, if any */
- fd_eject(0);
- wait_for_completion(&device_release);
- }
- module_param(floppy, charp, 0);
- module_param(FLOPPY_IRQ, int, 0);
- module_param(FLOPPY_DMA, int, 0);
- MODULE_AUTHOR("Alain L. Knaff");
- MODULE_SUPPORTED_DEVICE("fd");
- MODULE_LICENSE("GPL");
- #else
- __setup("floppy=", floppy_setup);
- module_init(floppy_init)
- #endif
- MODULE_ALIAS_BLOCKDEV_MAJOR(FLOPPY_MAJOR);