--- /dev/null
+/*
+ * 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.
+ */
+
+/*
+ * 1998/1/21 -- Richard Gooch <rgooch@atnf.csiro.au> -- devfs support
+ */
+
+/*
+ * 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.
+ */
+
+#undef FLOPPY_SILENT_DCL_CLEAR
+
+#define REALLY_SLOW_IO
+
+#define DEBUGT 2
+
+#define DPRINT(format, args...) \
+ pr_info("floppy%d: " format, current_drive, ##args)
+
+#define DCL_DEBUG /* debug disk change line */
+#ifdef DCL_DEBUG
+#define debug_dcl(test, fmt, args...) \
+ do { if ((test) & FD_DEBUG) DPRINT(fmt, ##args); } while (0)
+#else
+#define debug_dcl(test, fmt, args...) \
+ do { if (0) DPRINT(fmt, ##args); } while (0)
+#endif
+
+/* 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>
+#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/jiffies.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/platform_device.h>
+#include <linux/mod_devicetable.h>
+#include <linux/mutex.h>
+#include <linux/io.h>
+#include <linux/uaccess.h>
+#include <linux/async.h>
+
+/*
+ * 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 DEFINE_MUTEX(floppy_mutex);
+static int slow_floppy;
+
+#include <asm/dma.h>
+#include <asm/irq.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 unsigned short virtual_dma_port = 0x3f0;
+irqreturn_t floppy_interrupt(int irq, void *dev_id);
+static int set_dor(int fdc, char mask, char data);
+
+#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;
+
+#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 void do_fd_request(struct request_queue *q);
+static int set_next_request(void);
+
+#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 */
+ pr_info("DMA memory shortage. Temporarily falling back on virtual DMA\n");
+ *addr = (char *)nodma_mem_alloc(l);
+#else
+ return;
+#endif
+}
+
+/* End dma memory related stuff */
+
+static unsigned long fake_change;
+static bool initialized;
+
+#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 */
+ /* reverse mapping from unit and fdc to drive */
+#define REVDRIVE(fdc, unit) ((unit) + ((fdc) << 2))
+
+#define DP (&drive_params[current_drive])
+#define DRS (&drive_state[current_drive])
+#define DRWE (&write_errors[current_drive])
+#define FDCS (&fdc_state[fdc])
+
+#define UDP (&drive_params[drive])
+#define UDRS (&drive_state[drive])
+#define UDRWE (&write_errors[drive])
+#define UFDCS (&fdc_state[FDC(drive)])
+
+#define PH_HEAD(floppy, head) (((((floppy)->stretch & 2) >> 1) ^ head) << 2)
+#define STRETCH(floppy) ((floppy)->stretch & FD_STRETCH)
+
+/* 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 DEFINE_MUTEX(open_lock);
+static struct floppy_raw_cmd *raw_cmd, default_raw_cmd;
+static int fdc_queue;
+
+/*
+ * 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'.
+ *
+ * Bits 2 through 9 of 'stretch' tell the number of the first sector.
+ * The LSB (bit 2) is flipped. For most disks, the first sector
+ * is 1 (represented by 0x00<<2). For some CP/M and music sampler
+ * disks (such as Ensoniq EPS 16plus) it is 0 (represented as 0x01<<2).
+ * For Amstrad CPC disks it is 0xC1 (represented as 0xC0<<2).
+ *
+ * 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 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);
+
+/* 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 const 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(struct work_struct *);
+
+static int floppy_request_regions(int);
+static void floppy_release_regions(int);
+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.
+ */
+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 atomic_t usage_count = ATOMIC_INIT(0);
+
+/* buffer related variables */
+static int buffer_track = -1;
+static int buffer_drive = -1;
+static int buffer_min = -1;
+static int buffer_max = -1;
+
+/* fdc related variables, should end up in a struct */
+static struct floppy_fdc_state fdc_state[N_FDC];
+static int fdc; /* current fdc */
+
+static struct workqueue_struct *floppy_wq;
+
+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 */
+
+static inline bool drive_no_geom(int drive)
+{
+ return !current_type[drive] && !ITYPE(UDRS->fd_device);
+}
+
+#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 *func, const char *msg)
+{
+ if (DP->flags & DEBUGT)
+ pr_info("%s:%s dtime=%lu\n", func, msg, jiffies - debugtimer);
+}
+#else
+static inline void set_debugt(void) { }
+static inline void debugt(const char *func, const char *msg) { }
+#endif /* DEBUGT */
+
+
+static DECLARE_DELAYED_WORK(fd_timeout, floppy_shutdown);
+static const char *timeout_message;
+
+static void is_alive(const char *func, const char *message)
+{
+ /* this routine checks whether the floppy driver is "alive" */
+ if (test_bit(0, &fdc_busy) && command_status < 2 &&
+ !delayed_work_pending(&fd_timeout)) {
+ DPRINT("%s: timeout handler died. %s\n", func, message);
+ }
+}
+
+static void (*do_floppy)(void) = NULL;
+
+#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;
+
+#define current_reqD -1
+#define MAXTIMEOUT -2
+
+static void __reschedule_timeout(int drive, const char *message)
+{
+ unsigned long delay;
+
+ if (drive == current_reqD)
+ drive = current_drive;
+
+ if (drive < 0 || drive >= N_DRIVE) {
+ delay = 20UL * HZ;
+ drive = 0;
+ } else
+ delay = UDP->timeout;
+
+ mod_delayed_work(floppy_wq, &fd_timeout, delay);
+ if (UDP->flags & FD_DEBUG)
+ DPRINT("reschedule timeout %s\n", message);
+ timeout_message = message;
+}
+
+static void reschedule_timeout(int drive, const char *message)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&floppy_lock, flags);
+ __reschedule_timeout(drive, message);
+ 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);
+
+ if (time_before(jiffies, UDRS->select_date + UDP->select_delay))
+ DPRINT("WARNING disk change called early\n");
+ if (!(FDCS->dor & (0x10 << UNIT(drive))) ||
+ (FDCS->dor & 3) != UNIT(drive) || fdc != FDC(drive)) {
+ DPRINT("probing disk change on unselected drive\n");
+ DPRINT("drive=%d fdc=%d dor=%x\n", drive, FDC(drive),
+ (unsigned int)FDCS->dor);
+ }
+
+ debug_dcl(UDP->flags,
+ "checking disk change line for drive %d\n", drive);
+ debug_dcl(UDP->flags, "jiffies=%lu\n", jiffies);
+ debug_dcl(UDP->flags, "disk change line=%x\n", fd_inb(FD_DIR) & 0x80);
+ debug_dcl(UDP->flags, "flags=%lx\n", UDRS->flags);
+
+ if (UDP->flags & FD_BROKEN_DCL)
+ return test_bit(FD_DISK_CHANGED_BIT, &UDRS->flags);
+ if ((fd_inb(FD_DIR) ^ UDP->flags) & 0x80) {
+ set_bit(FD_VERIFY_BIT, &UDRS->flags);
+ /* verify write protection */
+
+ if (UDRS->maxblock) /* mark it changed */
+ set_bit(FD_DISK_CHANGED_BIT, &UDRS->flags);
+
+ /* invalidate its geometry */
+ if (UDRS->keep_data >= 0) {
+ if ((UDP->flags & FTD_MSG) &&
+ current_type[drive] != NULL)
+ DPRINT("Disk type is undefined after disk change\n");
+ current_type[drive] = NULL;
+ floppy_sizes[TOMINOR(drive)] = MAX_DISK_SIZE << 1;
+ }
+
+ return 1;
+ } else {
+ UDRS->last_checked = jiffies;
+ clear_bit(FD_DISK_NEWCHANGE_BIT, &UDRS->flags);
+ }
+ return 0;
+}
+
+static inline int is_selected(int dor, int unit)
+{
+ return ((dor & (0x10 << unit)) && (dor & 3) == unit);
+}
+
+static bool is_ready_state(int status)
+{
+ int state = status & (STATUS_READY | STATUS_DIR | STATUS_DMA);
+ return state == STATUS_READY;
+}
+
+static int set_dor(int fdc, char mask, char data)
+{
+ unsigned char unit;
+ unsigned char drive;
+ unsigned char newdor;
+ unsigned char 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);
+ debug_dcl(UDP->flags,
+ "calling disk change from set_dor\n");
+ 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;
+ }
+ }
+ 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) {
+ pr_info("bad fdc value\n");
+ return;
+ }
+ set_dor(fdc, ~0, 8);
+#if N_FDC > 1
+ set_dor(1 - fdc, ~8, 0);
+#endif
+ if (FDCS->rawcmd == 2)
+ reset_fdc_info(1);
+ if (fd_inb(FD_STATUS) != STATUS_READY)
+ FDCS->reset = 1;
+}
+
+/* locks the driver */
+static int lock_fdc(int drive, bool interruptible)
+{
+ if (WARN(atomic_read(&usage_count) == 0,
+ "Trying to lock fdc while usage count=0\n"))
+ return -1;
+
+ if (wait_event_interruptible(fdc_wait, !test_and_set_bit(0, &fdc_busy)))
+ return -EINTR;
+
+ command_status = FD_COMMAND_NONE;
+
+ reschedule_timeout(drive, "lock fdc");
+ set_fdc(drive);
+ return 0;
+}
+
+/* unlocks the driver */
+static void unlock_fdc(void)
+{
+ if (!test_bit(0, &fdc_busy))
+ DPRINT("FDC access conflict!\n");
+
+ raw_cmd = NULL;
+ command_status = FD_COMMAND_NONE;
+ cancel_delayed_work(&fd_timeout);
+ do_floppy = NULL;
+ cont = NULL;
+ clear_bit(0, &fdc_busy);
+ 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;
+ 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;
+ int drive;
+ int 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 void (*floppy_work_fn)(void);
+
+static void floppy_work_workfn(struct work_struct *work)
+{
+ floppy_work_fn();
+}
+
+static DECLARE_WORK(floppy_work, floppy_work_workfn);
+
+static void schedule_bh(void (*handler)(void))
+{
+ WARN_ON(work_pending(&floppy_work));
+
+ floppy_work_fn = handler;
+ queue_work(floppy_wq, &floppy_work);
+}
+
+static void (*fd_timer_fn)(void) = NULL;
+
+static void fd_timer_workfn(struct work_struct *work)
+{
+ fd_timer_fn();
+}
+
+static DECLARE_DELAYED_WORK(fd_timer, fd_timer_workfn);
+
+static void cancel_activity(void)
+{
+ do_floppy = NULL;
+ cancel_delayed_work_sync(&fd_timer);
+ cancel_work_sync(&floppy_work);
+}
+
+/* this function makes sure that the disk stays in the drive during the
+ * transfer */
+static void fd_watchdog(void)
+{
+ debug_dcl(DP->flags, "calling disk change from watchdog\n");
+
+ if (disk_change(current_drive)) {
+ DPRINT("disk removed during i/o\n");
+ cancel_activity();
+ cont->done(0);
+ reset_fdc();
+ } else {
+ cancel_delayed_work(&fd_timer);
+ fd_timer_fn = fd_watchdog;
+ queue_delayed_work(floppy_wq, &fd_timer, HZ / 10);
+ }
+}
+
+static void main_command_interrupt(void)
+{
+ cancel_delayed_work(&fd_timer);
+ cont->interrupt();
+}
+
+/* waits for a delay (spinup or select) to pass */
+static int fd_wait_for_completion(unsigned long expires,
+ void (*function)(void))
+{
+ 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 (time_before(jiffies, expires)) {
+ cancel_delayed_work(&fd_timer);
+ fd_timer_fn = function;
+ queue_delayed_work(floppy_wq, &fd_timer, expires - jiffies);
+ return 1;
+ }
+ return 0;
+}
+
+static void setup_DMA(void)
+{
+ unsigned long f;
+
+ if (raw_cmd->length == 0) {
+ int i;
+
+ pr_info("zero dma transfer size:");
+ for (i = 0; i < raw_cmd->cmd_count; i++)
+ pr_cont("%x,", raw_cmd->cmd[i]);
+ pr_cont("\n");
+ cont->done(0);
+ FDCS->reset = 1;
+ return;
+ }
+ if (((unsigned long)raw_cmd->kernel_data) % 512) {
+ pr_info("non aligned address: %p\n", raw_cmd->kernel_data);
+ cont->done(0);
+ FDCS->reset = 1;
+ return;
+ }
+ 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
+}
+
+static void show_floppy(void);
+
+/* waits until the fdc becomes ready */
+static int wait_til_ready(void)
+{
+ int status;
+ int counter;
+
+ if (FDCS->reset)
+ return -1;
+ for (counter = 0; counter < 10000; counter++) {
+ status = fd_inb(FD_STATUS);
+ if (status & STATUS_READY)
+ return status;
+ }
+ if (initialized) {
+ DPRINT("Getstatus times out (%x) on fdc %d\n", status, fdc);
+ show_floppy();
+ }
+ FDCS->reset = 1;
+ return -1;
+}
+
+/* sends a command byte to the fdc */
+static int output_byte(char byte)
+{
+ int status = wait_til_ready();
+
+ if (status < 0)
+ return -1;
+
+ if (is_ready_state(status)) {
+ fd_outb(byte, FD_DATA);
+ 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;
+ return 0;
+ }
+ FDCS->reset = 1;
+ if (initialized) {
+ DPRINT("Unable to send byte %x to FDC. Fdc=%x Status=%x\n",
+ byte, fdc, status);
+ show_floppy();
+ }
+ return -1;
+}
+
+/* gets the response from the fdc */
+static int result(void)
+{
+ int i;
+ int status = 0;
+
+ for (i = 0; i < MAX_REPLIES; i++) {
+ status = wait_til_ready();
+ if (status < 0)
+ break;
+ status &= STATUS_DIR | STATUS_READY | STATUS_BUSY | STATUS_DMA;
+ if ((status & ~STATUS_BUSY) == STATUS_READY) {
+ resultjiffies = jiffies;
+ resultsize = i;
+ return i;
+ }
+ if (status == (STATUS_DIR | STATUS_READY | STATUS_BUSY))
+ reply_buffer[i] = fd_inb(FD_DATA);
+ else
+ break;
+ }
+ if (initialized) {
+ DPRINT("get result error. Fdc=%d Last status=%x Read bytes=%d\n",
+ fdc, status, i);
+ show_floppy();
+ }
+ FDCS->reset = 1;
+ return -1;
+}
+
+#define MORE_OUTPUT -2
+/* does the fdc need more output? */
+static int need_more_output(void)
+{
+ int status = wait_til_ready();
+
+ if (status < 0)
+ return -1;
+
+ if (is_ready_state(status))
+ 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 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 too 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;
+ unsigned char spec2;
+ unsigned long srt;
+ unsigned long hlt;
+ unsigned long 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;
+ }
+
+ 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 - DIV_ROUND_UP(DP->srt * scale_dtr / 1000, NOMINAL_DTR);
+ if (slow_floppy)
+ srt = srt / 4;
+
+ SUPBOUND(srt, 0xf);
+ INFBOUND(srt, 0);
+
+ hlt = DIV_ROUND_UP(DP->hlt * scale_dtr / 2, NOMINAL_DTR);
+ if (hlt < 0x01)
+ hlt = 0x01;
+ else if (hlt > 0x7f)
+ hlt = hlt_max_code;
+
+ hut = DIV_ROUND_UP(DP->hut * scale_dtr / 16, 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, floppy_ready);
+} /* fdc_dtr */
+
+static void tell_sector(void)
+{
+ pr_cont(": track %d, head %d, sector %d, size %d",
+ R_TRACK, R_HEAD, R_SECTOR, R_SIZECODE);
+} /* tell_sector */
+
+static void print_errors(void)
+{
+ DPRINT("");
+ if (ST0 & ST0_ECE) {
+ pr_cont("Recalibrate failed!");
+ } else if (ST2 & ST2_CRC) {
+ pr_cont("data CRC error");
+ tell_sector();
+ } else if (ST1 & ST1_CRC) {
+ pr_cont("CRC error");
+ tell_sector();
+ } else if ((ST1 & (ST1_MAM | ST1_ND)) ||
+ (ST2 & ST2_MAM)) {
+ if (!probing) {
+ pr_cont("sector not found");
+ tell_sector();
+ } else
+ pr_cont("probe failed...");
+ } else if (ST2 & ST2_WC) { /* seek error */
+ pr_cont("wrong cylinder");
+ } else if (ST2 & ST2_BC) { /* cylinder marked as bad */
+ pr_cont("bad cylinder");
+ } else {
+ pr_cont("unknown error. ST[0..2] are: 0x%x 0x%x 0x%x",
+ ST0, ST1, ST2);
+ tell_sector();
+ }
+ pr_cont("\n");
+}
+
+/*
+ * 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\n");
+ FDCS->reset = 1;
+ return 1;
+ }
+
+ /* check IC to find cause of interrupt */
+ switch (ST0 & ST0_INTR) {
+ case 0x40: /* error occurred during command execution */
+ if (ST1 & ST1_EOC)
+ return 0; /* occurs with pseudo-DMA */
+ bad = 1;
+ if (ST1 & ST1_WP) {
+ DPRINT("Drive is write protected\n");
+ clear_bit(FD_DISK_WRITABLE_BIT, &DRS->flags);
+ cont->done(0);
+ bad = 2;
+ } else if (ST1 & ST1_ND) {
+ set_bit(FD_NEED_TWADDLE_BIT, &DRS->flags);
+ } else if (ST1 & ST1_OR) {
+ if (DP->flags & FTD_MSG)
+ DPRINT("Over/Underrun - retrying\n");
+ bad = 0;
+ } else if (*errors >= DP->max_errors.reporting) {
+ print_errors();
+ }
+ if (ST2 & ST2_WC || ST2 & ST2_BC)
+ /* wrong cylinder => recal */
+ DRS->track = NEED_2_RECAL;
+ return bad;
+ case 0x80: /* invalid command given */
+ DPRINT("Invalid FDC command given!\n");
+ cont->done(0);
+ return 2;
+ case 0xc0:
+ DPRINT("Abnormal termination caused by polling\n");
+ cont->error();
+ return 2;
+ default: /* (0) Normal command termination */
+ return 0;
+ }
+}
+
+/*
+ * This routine is called when everything should be correctly set up
+ * for the transfer (i.e. floppy motor is on, the correct floppy is
+ * selected, and the head is sitting on the right track).
+ */
+static void setup_rw_floppy(void)
+{
+ int i;
+ int r;
+ int flags;
+ int dflags;
+ unsigned long ready_date;
+ void (*function)(void);
+
+ 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 (time_after(ready_date, jiffies + DP->select_delay)) {
+ ready_date -= DP->select_delay;
+ function = floppy_start;
+ } else
+ function = 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(__func__, "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(__func__, "");
+ if (inr != 2 || (ST0 & 0xF8) != 0x20) {
+ DPRINT("seek failed\n");
+ DRS->track = NEED_2_RECAL;
+ cont->error();
+ cont->redo();
+ return;
+ }
+ if (DRS->track >= 0 && DRS->track != ST1 && !blind_seek) {
+ debug_dcl(DP->flags,
+ "clearing NEWCHANGE flag because of effective seek\n");
+ debug_dcl(DP->flags, "jiffies=%lu\n", jiffies);
+ clear_bit(FD_DISK_NEWCHANGE_BIT, &DRS->flags);
+ /* effective seek */
+ DRS->select_date = jiffies;
+ }
+ DRS->track = ST1;
+ floppy_ready();
+}
+
+static void check_wp(void)
+{
+ if (test_bit(FD_VERIFY_BIT, &DRS->flags)) {
+ /* check write protection */
+ output_byte(FD_GETSTATUS);
+ output_byte(UNIT(current_drive));
+ if (result() != 1) {
+ FDCS->reset = 1;
+ return;
+ }
+ clear_bit(FD_VERIFY_BIT, &DRS->flags);
+ clear_bit(FD_NEED_TWADDLE_BIT, &DRS->flags);
+ debug_dcl(DP->flags,
+ "checking whether disk is write protected\n");
+ debug_dcl(DP->flags, "wp=%x\n", ST3 & 0x40);
+ if (!(ST3 & 0x40))
+ set_bit(FD_DISK_WRITABLE_BIT, &DRS->flags);
+ else
+ clear_bit(FD_DISK_WRITABLE_BIT, &DRS->flags);
+ }
+}
+
+static void seek_floppy(void)
+{
+ int track;
+
+ blind_seek = 0;
+
+ debug_dcl(DP->flags, "calling disk change from %s\n", __func__);
+
+ if (!test_bit(FD_DISK_NEWCHANGE_BIT, &DRS->flags) &&
+ 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.
+ */
+ set_bit(FD_DISK_CHANGED_BIT, &DRS->flags);
+ cont->done(0);
+ cont->redo();
+ return;
+ }
+ if (DRS->track <= NEED_1_RECAL) {
+ recalibrate_floppy();
+ return;
+ } else if (test_bit(FD_DISK_NEWCHANGE_BIT, &DRS->flags) &&
+ (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));
+ if (output_byte(track) < 0) {
+ reset_fdc();
+ return;
+ }
+ debugt(__func__, "");
+}
+
+static void recal_interrupt(void)
+{
+ debugt(__func__, "");
+ if (inr != 2)
+ FDCS->reset = 1;
+ else if (ST0 & ST0_ECE) {
+ switch (DRS->track) {
+ case NEED_1_RECAL:
+ debugt(__func__, "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(__func__, "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 */
+ debug_dcl(DP->flags,
+ "clearing NEWCHANGE flag because of second recalibrate\n");
+
+ clear_bit(FD_DISK_NEWCHANGE_BIT, &DRS->flags);
+ DRS->select_date = jiffies;
+ /* fall through */
+ default:
+ debugt(__func__, "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++)
+ pr_cont("repl[%d]=%x ", i, reply_buffer[i]);
+ pr_cont("\n");
+}
+
+/* interrupt handler. Note that this can be called externally on the Sparc */
+irqreturn_t floppy_interrupt(int irq, void *dev_id)
+{
+ int do_print;
+ unsigned long f;
+ void (*handler)(void) = do_floppy;
+
+ lasthandler = handler;
+ interruptjiffies = jiffies;
+
+ f = claim_dma_lock();
+ fd_disable_dma();
+ release_dma_lock(f);
+
+ do_floppy = NULL;
+ if (fdc >= N_FDC || FDCS->address == -1) {
+ /* we don't even know which FDC is the culprit */
+ pr_info("DOR0=%x\n", fdc_state[0].dor);
+ pr_info("floppy interrupt on bizarre fdc %d\n", fdc);
+ pr_info("handler=%pf\n", handler);
+ is_alive(__func__, "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 && initialized;
+
+ 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(__func__, "normal interrupt end");
+
+ /* FIXME! Was it really for us? */
+ return IRQ_HANDLED;
+}
+
+static void recalibrate_floppy(void)
+{
+ debugt(__func__, "");
+ do_floppy = recal_interrupt;
+ output_byte(FD_RECALIBRATE);
+ if (output_byte(UNIT(current_drive)) < 0)
+ reset_fdc();
+}
+
+/*
+ * Must do 4 FD_SENSEIs after reset because of ``drive polling''.
+ */
+static void reset_interrupt(void)
+{
+ debugt(__func__, "");
+ result(); /* get the status ready for set_fdc */
+ if (FDCS->reset) {
+ pr_info("reset set in interrupt, calling %pf\n", cont->error);
+ cont->error(); /* a reset just after a reset. BAD! */
+ }
+ cont->redo();
+}
+
+/*
+ * reset is done by pulling bit 2 of DOR low for a while (old FDCs),
+ * or by setting the self clearing bit 7 of STATUS (newer FDCs)
+ */
+static void reset_fdc(void)
+{
+ 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;
+
+ pr_info("\n");
+ pr_info("floppy driver state\n");
+ pr_info("-------------------\n");
+ pr_info("now=%lu last interrupt=%lu diff=%lu last called handler=%pf\n",
+ jiffies, interruptjiffies, jiffies - interruptjiffies,
+ lasthandler);
+
+ pr_info("timeout_message=%s\n", timeout_message);
+ pr_info("last output bytes:\n");
+ for (i = 0; i < OLOGSIZE; i++)
+ pr_info("%2x %2x %lu\n",
+ output_log[(i + output_log_pos) % OLOGSIZE].data,
+ output_log[(i + output_log_pos) % OLOGSIZE].status,
+ output_log[(i + output_log_pos) % OLOGSIZE].jiffies);
+ pr_info("last result at %lu\n", resultjiffies);
+ pr_info("last redo_fd_request at %lu\n", lastredo);
+ print_hex_dump(KERN_INFO, "", DUMP_PREFIX_NONE, 16, 1,
+ reply_buffer, resultsize, true);
+
+ pr_info("status=%x\n", fd_inb(FD_STATUS));
+ pr_info("fdc_busy=%lu\n", fdc_busy);
+ if (do_floppy)
+ pr_info("do_floppy=%pf\n", do_floppy);
+ if (work_pending(&floppy_work))
+ pr_info("floppy_work.func=%pf\n", floppy_work.func);
+ if (delayed_work_pending(&fd_timer))
+ pr_info("delayed work.function=%p expires=%ld\n",
+ fd_timer.work.func,
+ fd_timer.timer.expires - jiffies);
+ if (delayed_work_pending(&fd_timeout))
+ pr_info("timer_function=%p expires=%ld\n",
+ fd_timeout.work.func,
+ fd_timeout.timer.expires - jiffies);
+
+ pr_info("cont=%p\n", cont);
+ pr_info("current_req=%p\n", current_req);
+ pr_info("command_status=%d\n", command_status);
+ pr_info("\n");
+}
+
+static void floppy_shutdown(struct work_struct *arg)
+{
+ unsigned long flags;
+
+ if (initialized)
+ show_floppy();
+ cancel_activity();
+
+ flags = claim_dma_lock();
+ fd_disable_dma();
+ release_dma_lock(flags);
+
+ /* avoid dma going to a random drive after shutdown */
+
+ if (initialized)
+ DPRINT("floppy timeout called\n");
+ FDCS->reset = 1;
+ if (cont) {
+ cont->done(0);
+ cont->redo(); /* this will recall reset when needed */
+ } else {
+ pr_info("no cont in shutdown!\n");
+ process_fd_request();
+ }
+ is_alive(__func__, "");
+}
+
+/* start motor, check media-changed condition and write protection */
+static int start_motor(void (*function)(void))
+{
+ int mask;
+ int 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,
+ function);
+}
+
+static void floppy_ready(void)
+{
+ if (FDCS->reset) {
+ reset_fdc();
+ return;
+ }
+ if (start_motor(floppy_ready))
+ return;
+ if (fdc_dtr())
+ return;
+
+ debug_dcl(DP->flags, "calling disk change from floppy_ready\n");
+ 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");
+
+ scandrives();
+ debug_dcl(DP->flags, "setting NEWCHANGE in floppy_start\n");
+ set_bit(FD_DISK_NEWCHANGE_BIT, &DRS->flags);
+ 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");
+ cont = NULL;
+ command_status += 2;
+ wake_up(&command_done);
+}
+
+static const struct cont_t wakeup_cont = {
+ .interrupt = empty,
+ .redo = do_wakeup,
+ .error = empty,
+ .done = (done_f)empty
+};
+
+static const 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), bool interruptible)
+{
+ int ret;
+
+ schedule_bh(handler);
+
+ if (interruptible)
+ wait_event_interruptible(command_done, command_status >= 2);
+ else
+ wait_event(command_done, command_status >= 2);
+
+ 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 FM_MODE(x, y) ((y) & ~(((x)->rate & 0x80) >> 1))
+#define CT(x) ((x) | 0xc0)
+
+static void setup_format_params(int track)
+{
+ int n;
+ int il;
+ int count;
+ int head_shift;
+ int track_shift;
+ struct fparm {
+ unsigned char track, head, sect, size;
+ } *here = (struct fparm *)floppy_track_buffer;
+
+ 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_SECTBASEMASK) {
+ for (count = 0; count < F_SECT_PER_TRACK; count++)
+ here[count].sect += FD_SECTBASE(_floppy) - 1;
+ }
+}
+
+static void redo_format(void)
+{
+ buffer_track = -1;
+ setup_format_params(format_req.track << STRETCH(_floppy));
+ floppy_start();
+ debugt(__func__, "queue format request");
+}
+
+static const 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;
+
+ if (lock_fdc(drive, true))
+ return -EINTR;
+
+ 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;
+ ret = wait_til_done(redo_format, true);
+ if (ret == -EINTR)
+ return -EINTR;
+ process_fd_request();
+ return ret;
+}
+
+/*
+ * Buffer read/write and support
+ * =============================
+ */
+
+static void floppy_end_request(struct request *req, int error)
+{
+ unsigned int nr_sectors = current_count_sectors;
+ unsigned int drive = (unsigned long)req->rq_disk->private_data;
+
+ /* current_count_sectors can be zero if transfer failed */
+ if (error)
+ nr_sectors = blk_rq_cur_sectors(req);
+ if (__blk_end_request(req, error, nr_sectors << 9))
+ return;
+
+ /* We're done with the request */
+ floppy_off(drive);
+ 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 *req = current_req;
+ struct request_queue *q;
+ unsigned long flags;
+ int block;
+ char msg[sizeof("request done ") + sizeof(int) * 3];
+
+ probing = 0;
+ snprintf(msg, sizeof(msg), "request done %d", uptodate);
+ reschedule_timeout(MAXTIMEOUT, msg);
+
+ if (!req) {
+ pr_info("floppy.c: no request in request_done\n");
+ return;
+ }
+
+ q = req->q;
+
+ if (uptodate) {
+ /* maintain values for invalidation on geometry
+ * change */
+ block = current_count_sectors + blk_rq_pos(req);
+ 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, 0);
+ 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 = blk_rq_pos(req);
+ DRWE->first_error_generation = DRS->generation;
+ }
+ DRWE->last_error_sector = blk_rq_pos(req);
+ DRWE->last_error_generation = DRS->generation;
+ }
+ spin_lock_irqsave(q->queue_lock, flags);
+ floppy_end_request(req, -EIO);
+ spin_unlock_irqrestore(q->queue_lock, flags);
+ }
+}
+
+/* Interrupt handler evaluating the result of the r/w operation */
+static void rw_interrupt(void)
+{
+ int eoc;
+ int ssize;
+ int heads;
+ int nr_sectors;
+
+ 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;
+ ssize = DIV_ROUND_UP(1 << SIZECODE, 4);
+
+ 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;
+
+ if (nr_sectors / ssize >
+ DIV_ROUND_UP(in_sector_offset + current_count_sectors, ssize)) {
+ DPRINT("long rw: %x instead of %lx\n",
+ nr_sectors, current_count_sectors);
+ pr_info("rs=%d s=%d\n", R_SECTOR, SECTOR);
+ pr_info("rh=%d h=%d\n", R_HEAD, HEAD);
+ pr_info("rt=%d t=%d\n", R_TRACK, TRACK);
+ pr_info("heads=%d eoc=%d\n", heads, eoc);
+ pr_info("spt=%d st=%d ss=%d\n",
+ SECT_PER_TRACK, fsector_t, ssize);
+ pr_info("in_sector_offset=%d\n", in_sector_offset);
+ }
+
+ 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%d\n",
+ _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 == bio_data(current_req->bio)) {
+ /* 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_vec bv;
+ int size;
+ struct req_iterator iter;
+ char *base;
+
+ base = bio_data(current_req->bio);
+ size = 0;
+
+ rq_for_each_segment(bv, current_req, iter) {
+ 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;
+ char *buffer;
+ char *dma_buffer;
+ int size;
+ struct req_iterator iter;
+
+ max_sector = transfer_size(ssize,
+ min(max_sector, max_sector_2),
+ blk_rq_sectors(current_req));
+
+ if (current_count_sectors <= 0 && CT(COMMAND) == FD_WRITE &&
+ buffer_max > fsector_t + blk_rq_sectors(current_req))
+ current_count_sectors = min_t(int, buffer_max - fsector_t,
+ blk_rq_sectors(current_req));
+
+ remaining = current_count_sectors << 9;
+ if (remaining > blk_rq_bytes(current_req) && CT(COMMAND) == FD_WRITE) {
+ DPRINT("in copy buffer\n");
+ pr_info("current_count_sectors=%ld\n", current_count_sectors);
+ pr_info("remaining=%d\n", remaining >> 9);
+ pr_info("current_req->nr_sectors=%u\n",
+ blk_rq_sectors(current_req));
+ pr_info("current_req->current_nr_sectors=%u\n",
+ blk_rq_cur_sectors(current_req));
+ pr_info("max_sector=%d\n", max_sector);
+ pr_info("ssize=%d\n", ssize);
+ }
+
+ buffer_max = max(max_sector, buffer_max);
+
+ dma_buffer = floppy_track_buffer + ((fsector_t - buffer_min) << 9);
+
+ size = blk_rq_cur_bytes(current_req);
+
+ rq_for_each_segment(bv, current_req, iter) {
+ if (!remaining)
+ break;
+
+ size = bv.bv_len;
+ SUPBOUND(size, remaining);
+
+ buffer = page_address(bv.bv_page) + bv.bv_offset;
+ if (dma_buffer + size >
+ floppy_track_buffer + (max_buffer_sectors << 10) ||
+ dma_buffer < floppy_track_buffer) {
+ DPRINT("buffer overrun in copy buffer %d\n",
+ (int)((floppy_track_buffer - dma_buffer) >> 9));
+ pr_info("fsector_t=%d buffer_min=%d\n",
+ fsector_t, buffer_min);
+ pr_info("current_count_sectors=%ld\n",
+ current_count_sectors);
+ if (CT(COMMAND) == FD_READ)
+ pr_info("read\n");
+ if (CT(COMMAND) == FD_WRITE)
+ pr_info("write\n");
+ break;
+ }
+ if (((unsigned long)buffer) % 512)
+ DPRINT("%p buffer not aligned\n", buffer);
+
+ if (CT(COMMAND) == FD_READ)
+ memcpy(buffer, dma_buffer, size);
+ else
+ memcpy(dma_buffer, buffer, size);
+
+ remaining -= size;
+ dma_buffer += size;
+ }
+ if (remaining) {
+ if (remaining > 0)
+ max_sector -= remaining >> 9;
+ DPRINT("weirdness: remaining %d\n", remaining >> 9);
+ }
+}
+
+/* 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;
+ int 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;
+ if (end_sector > SECT_PER_TRACK) {
+ pr_info("too many sectors %d > %d\n",
+ end_sector, SECT_PER_TRACK);
+ return;
+ }
+ 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;
+ int max_size;
+ int tracksize;
+ int ssize;
+
+ if (WARN(max_buffer_sectors == 0, "VFS: Block I/O scheduled on unopened device\n"))
+ 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_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("%s: unknown command\n", __func__);
+ return 0;
+ }
+
+ max_sector = _floppy->sect * _floppy->head;
+
+ TRACK = (int)blk_rq_pos(current_req) / max_sector;
+ fsector_t = (int)blk_rq_pos(current_req) % max_sector;
+ if (_floppy->track && TRACK >= _floppy->track) {
+ if (blk_rq_cur_sectors(current_req) & 1) {
+ current_count_sectors = 1;
+ return 1;
+ } else
+ return 0;
+ }
+ HEAD = fsector_t / _floppy->sect;
+
+ if (((_floppy->stretch & (FD_SWAPSIDES | FD_SECTBASEMASK)) ||
+ test_bit(FD_NEED_TWADDLE_BIT, &DRS->flags)) &&
+ 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,
+ blk_rq_sectors(current_req));
+ 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;
+ ssize = DIV_ROUND_UP(1 << SIZECODE, 4);
+ SECT_PER_TRACK = _floppy->sect << 2 >> SIZECODE;
+ SECTOR = ((fsector_t % _floppy->sect) << 2 >> SIZECODE) +
+ FD_SECTBASE(_floppy);
+
+ /* 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 = blk_rq_sectors(current_req);
+ 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 || blk_rq_sectors(current_req) < ssize) {
+ if (CT(COMMAND) == FD_WRITE) {
+ unsigned int sectors;
+
+ sectors = fsector_t + blk_rq_sectors(current_req);
+ if (sectors > ssize && 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)bio_data(current_req->bio) < 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)bio_data(current_req->bio))) >> 9;
+ if ((unsigned long)max_size > dma_limit)
+ max_size = dma_limit;
+ /* 64 kb boundaries */
+ if (CROSS_64KB(bio_data(current_req->bio), max_size << 9))
+ max_size = (K_64 -
+ ((unsigned long)bio_data(current_req->bio)) %
+ 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 &&
+ ((!probing ||
+ (DP->read_track & (1 << DRS->probed_format)))))) {
+ max_size = blk_rq_sectors(current_req);
+ } else {
+ raw_cmd->kernel_data = bio_data(current_req->bio);
+ raw_cmd->length = current_count_sectors << 9;
+ if (raw_cmd->length == 0) {
+ DPRINT("%s: zero dma transfer attempted\n", __func__);
+ DPRINT("indirect=%d direct=%d fsector_t=%d\n",
+ indirect, direct, fsector_t);
+ return 0;
+ }
+ virtualdmabug_workaround();
+ return 2;
+ }
+ }
+
+ if (CT(COMMAND) == FD_READ)
+ max_size = max_sector; /* unbounded */
+
+ /* claim buffer track if needed */
+ if (buffer_track != raw_cmd->track || /* bad track */
+ buffer_drive != current_drive || /* bad drive */
+ fsector_t > buffer_max ||
+ fsector_t < buffer_min ||
+ ((CT(COMMAND) == FD_READ ||
+ (!in_sector_offset && blk_rq_sectors(current_req) >= 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) */
+ if (in_sector_offset && buffer_track == -1)
+ DPRINT("internal error offset !=0 on write\n");
+ 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;
+ if ((raw_cmd->length < current_count_sectors << 9) ||
+ (raw_cmd->kernel_data != bio_data(current_req->bio) &&
+ CT(COMMAND) == FD_WRITE &&
+ (aligned_sector_t + (raw_cmd->length >> 9) > buffer_max ||
+ aligned_sector_t < buffer_min)) ||
+ raw_cmd->length % (128 << SIZECODE) ||
+ raw_cmd->length <= 0 || current_count_sectors <= 0) {
+ DPRINT("fractionary current count b=%lx s=%lx\n",
+ raw_cmd->length, current_count_sectors);
+ if (raw_cmd->kernel_data != bio_data(current_req->bio))
+ pr_info("addr=%d, length=%ld\n",
+ (int)((raw_cmd->kernel_data -
+ floppy_track_buffer) >> 9),
+ current_count_sectors);
+ pr_info("st=%d ast=%d mse=%d msi=%d\n",
+ fsector_t, aligned_sector_t, max_sector, max_size);
+ pr_info("ssize=%x SIZECODE=%d\n", ssize, SIZECODE);
+ pr_info("command=%x SECTOR=%d HEAD=%d, TRACK=%d\n",
+ COMMAND, SECTOR, HEAD, TRACK);
+ pr_info("buffer drive=%d\n", buffer_drive);
+ pr_info("buffer track=%d\n", buffer_track);
+ pr_info("buffer_min=%d\n", buffer_min);
+ pr_info("buffer_max=%d\n", buffer_max);
+ return 0;
+ }
+
+ if (raw_cmd->kernel_data != bio_data(current_req->bio)) {
+ if (raw_cmd->kernel_data < floppy_track_buffer ||
+ current_count_sectors < 0 ||
+ raw_cmd->length < 0 ||
+ raw_cmd->kernel_data + raw_cmd->length >
+ floppy_track_buffer + (max_buffer_sectors << 10)) {
+ DPRINT("buffer overrun in schedule dma\n");
+ pr_info("fsector_t=%d buffer_min=%d current_count=%ld\n",
+ fsector_t, buffer_min, raw_cmd->length >> 9);
+ pr_info("current_count_sectors=%ld\n",
+ current_count_sectors);
+ if (CT(COMMAND) == FD_READ)
+ pr_info("read\n");
+ if (CT(COMMAND) == FD_WRITE)
+ pr_info("write\n");
+ return 0;
+ }
+ } else if (raw_cmd->length > blk_rq_bytes(current_req) ||
+ current_count_sectors > blk_rq_sectors(current_req)) {
+ DPRINT("buffer overrun in direct transfer\n");
+ return 0;
+ } else if (raw_cmd->length < current_count_sectors << 9) {
+ DPRINT("more sectors than bytes\n");
+ pr_info("bytes=%ld\n", raw_cmd->length >> 9);
+ pr_info("sectors=%ld\n", current_count_sectors);
+ }
+ if (raw_cmd->length == 0) {
+ DPRINT("zero dma transfer attempted from make_raw_request\n");
+ return 0;
+ }
+
+ virtualdmabug_workaround();
+ return 2;
+}
+
+/*
+ * Round-robin between our available drives, doing one request from each
+ */
+static int set_next_request(void)
+{
+ struct request_queue *q;
+ int old_pos = fdc_queue;
+
+ do {
+ q = disks[fdc_queue]->queue;
+ if (++fdc_queue == N_DRIVE)
+ fdc_queue = 0;
+ if (q) {
+ current_req = blk_fetch_request(q);
+ if (current_req)
+ break;
+ }
+ } while (fdc_queue != old_pos);
+
+ return current_req != NULL;
+}
+
+static void redo_fd_request(void)
+{
+ int drive;
+ int tmp;
+
+ lastredo = jiffies;
+ if (current_drive < N_DRIVE)
+ floppy_off(current_drive);
+
+do_request:
+ if (!current_req) {
+ int pending;
+
+ spin_lock_irq(&floppy_lock);
+ pending = set_next_request();
+ spin_unlock_irq(&floppy_lock);
+ if (!pending) {
+ do_floppy = NULL;
+ unlock_fdc();
+ return;
+ }
+ }
+ drive = (long)current_req->rq_disk->private_data;
+ set_fdc(drive);
+ reschedule_timeout(current_reqD, "redo fd request");
+
+ 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) ||
+ test_bit(FD_DISK_CHANGED_BIT, &DRS->flags)) {
+ DPRINT("disk absent or changed during operation\n");
+ request_done(0);
+ goto do_request;
+ }
+ if (!_floppy) { /* Autodetection */
+ if (!probing) {
+ DRS->probed_format = 0;
+ if (next_valid_format()) {
+ DPRINT("no autodetectable formats\n");
+ _floppy = NULL;
+ request_done(0);
+ goto do_request;
+ }
+ }
+ 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);
+ goto do_request;
+ }
+
+ if (test_bit(FD_NEED_TWADDLE_BIT, &DRS->flags))
+ twaddle();
+ schedule_bh(floppy_start);
+ debugt(__func__, "queue fd request");
+ return;
+}
+
+static const 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(struct request_queue *q)
+{
+ if (WARN(max_buffer_sectors == 0,
+ "VFS: %s called on non-open device\n", __func__))
+ return;
+
+ if (WARN(atomic_read(&usage_count) == 0,
+ "warning: usage count=0, current_req=%p sect=%ld type=%x flags=%llx\n",
+ current_req, (long)blk_rq_pos(current_req), current_req->cmd_type,
+ (unsigned long long) current_req->cmd_flags))
+ return;
+
+ if (test_and_set_bit(0, &fdc_busy)) {
+ /* fdc busy, this new request will be treated when the
+ current one is done */
+ is_alive(__func__, "old request running");
+ return;
+ }
+ command_status = FD_COMMAND_NONE;
+ __reschedule_timeout(MAXTIMEOUT, "fd_request");
+ set_fdc(0);
+ process_fd_request();
+ is_alive(__func__, "");
+}
+
+static const struct cont_t poll_cont = {
+ .interrupt = success_and_wakeup,
+ .redo = floppy_ready,
+ .error = generic_failure,
+ .done = generic_done
+};
+
+static int poll_drive(bool interruptible, int flag)
+{
+ /* 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;
+ debug_dcl(DP->flags, "setting NEWCHANGE in poll_drive\n");
+ set_bit(FD_DISK_NEWCHANGE_BIT, &DRS->flags);
+
+ return wait_til_done(floppy_ready, interruptible);
+}
+
+/*
+ * User triggered reset
+ * ====================
+ */
+
+static void reset_intr(void)
+{
+ pr_info("weird, reset interrupt called\n");
+}
+
+static const 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, bool interruptible)
+{
+ int ret;
+
+ if (lock_fdc(drive, interruptible))
+ return -EINTR;
+
+ if (arg == FD_RESET_ALWAYS)
+ FDCS->reset = 1;
+ if (FDCS->reset) {
+ cont = &reset_cont;
+ ret = wait_til_done(reset_fdc, interruptible);
+ if (ret == -EINTR)
+ return -EINTR;
+ }
+ process_fd_request();
+ return 0;
+}
+
+/*
+ * 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;
+}
+
+static 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 const struct cont_t raw_cmd_cont = {
+ .interrupt = success_and_wakeup,
+ .redo = floppy_start,
+ .error = generic_failure,
+ .done = raw_cmd_done
+};
+
+static int raw_cmd_copyout(int cmd, void __user *param,
+ struct floppy_raw_cmd *ptr)
+{
+ int ret;
+
+ while (ptr) {
+ struct floppy_raw_cmd cmd = *ptr;
+ cmd.next = NULL;
+ cmd.kernel_data = NULL;
+ ret = copy_to_user(param, &cmd, sizeof(cmd));
+ if (ret)
+ return -EFAULT;
+ param += sizeof(struct floppy_raw_cmd);
+ if ((ptr->flags & FD_RAW_READ) && ptr->buffer_length) {
+ if (ptr->length >= 0 &&
+ ptr->length <= ptr->buffer_length) {
+ long length = ptr->buffer_length - ptr->length;
+ ret = fd_copyout(ptr->data, ptr->kernel_data,
+ length);
+ if (ret)
+ return ret;
+ }
+ }
+ ptr = ptr->next;
+ }
+
+ return 0;
+}
+
+static void raw_cmd_free(struct floppy_raw_cmd **ptr)
+{
+ struct floppy_raw_cmd *next;
+ struct floppy_raw_cmd *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 int raw_cmd_copyin(int cmd, void __user *param,
+ struct floppy_raw_cmd **rcmd)
+{
+ struct floppy_raw_cmd *ptr;
+ int ret;
+ int i;
+
+ *rcmd = NULL;
+
+loop:
+ ptr = kmalloc(sizeof(struct floppy_raw_cmd), GFP_USER);
+ if (!ptr)
+ return -ENOMEM;
+ *rcmd = ptr;
+ ret = copy_from_user(ptr, param, sizeof(*ptr));
+ ptr->next = NULL;
+ ptr->buffer_length = 0;
+ ptr->kernel_data = NULL;
+ if (ret)
+ return -EFAULT;
+ 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;
+
+ 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) {
+ ret = fd_copyin(ptr->data, ptr->kernel_data, ptr->length);
+ if (ret)
+ return ret;
+ }
+
+ if (ptr->flags & FD_RAW_MORE) {
+ rcmd = &(ptr->next);
+ ptr->rate &= 0x43;
+ goto loop;
+ }
+
+ return 0;
+}
+
+static int raw_cmd_ioctl(int cmd, void __user *param)
+{
+ struct floppy_raw_cmd *my_raw_cmd;
+ int drive;
+ int ret2;
+ int ret;
+
+ 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, true);
+ debug_dcl(DP->flags, "calling disk change from raw_cmd ioctl\n");
+
+ 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 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_SECTBASEMASK)) != 0)
+ return -EINVAL;
+ if (type) {
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+ mutex_lock(&open_lock);
+ if (lock_fdc(drive, true)) {
+ mutex_unlock(&open_lock);
+ return -EINTR;
+ }
+ 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, true);
+ }
+ mutex_unlock(&open_lock);
+ } else {
+ int oldStretch;
+
+ if (lock_fdc(drive, true))
+ return -EINTR;
+ if (cmd != FDDEFPRM) {
+ /* notice a disk change immediately, else
+ * we lose our settings immediately*/
+ if (poll_drive(true, FD_RAW_NEED_DISK) == -EINTR)
+ return -EINTR;
+ }
+ 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_SECTBASEMASK)))
+ invalidate_drive(bdev);
+ else
+ process_fd_request();
+ }
+ return 0;
+}
+
+/* handle obsolete ioctl's */
+static unsigned 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 int normalize_ioctl(unsigned 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)) {
+ pr_info("ioctl not yet supported\n");
+ 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 {
+ if (lock_fdc(drive, false))
+ return -EINTR;
+ if (poll_drive(false, 0) == -EINTR)
+ return -EINTR;
+ process_fd_request();
+ *g = current_type[drive];
+ }
+ if (!*g)
+ return -ENODEV;
+ return 0;
+}
+
+static int fd_getgeo(struct block_device *bdev, struct hd_geometry *geo)
+{
+ int drive = (long)bdev->bd_disk->private_data;
+ int type = ITYPE(drive_state[drive].fd_device);
+ struct floppy_struct *g;
+ int ret;
+
+ ret = get_floppy_geometry(drive, type, &g);
+ if (ret)
+ return ret;
+
+ geo->heads = g->head;
+ geo->sectors = g->sect;
+ geo->cylinders = g->track;
+ return 0;
+}
+
+static int fd_locked_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd,
+ unsigned long param)
+{
+ int drive = (long)bdev->bd_disk->private_data;
+ int type = ITYPE(UDRS->fd_device);
+ int i;
+ 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 void *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 ioctl\n");
+ DPRINT("please use floppycontrol --eject\n");
+ cmd = FDEJECT;
+ }
+
+ if (!((cmd & 0xff00) == 0x0200))
+ return -EINVAL;
+
+ /* convert the old style command into a new style command */
+ ret = normalize_ioctl(&cmd, &size);
+ if (ret)
+ return ret;
+
+ /* permission checks */
+ if (((cmd & 0x40) && !(mode & (FMODE_WRITE | FMODE_WRITE_IOCTL))) ||
+ ((cmd & 0x80) && !capable(CAP_SYS_ADMIN)))
+ return -EPERM;
+
+ if (WARN_ON(size < 0 || size > sizeof(inparam)))
+ return -EINVAL;
+
+ /* copyin */
+ memset(&inparam, 0, sizeof(inparam));
+ if (_IOC_DIR(cmd) & _IOC_WRITE) {
+ ret = fd_copyin((void __user *)param, &inparam, size);
+ if (ret)
+ return ret;
+ }
+
+ switch (cmd) {
+ case FDEJECT:
+ if (UDRS->fd_ref != 1)
+ /* somebody else has this drive open */
+ return -EBUSY;
+ if (lock_fdc(drive, true))
+ return -EINTR;
+
+ /* do the actual eject. Fails on
+ * non-Sparc architectures */
+ ret = fd_eject(UNIT(drive));
+
+ set_bit(FD_DISK_CHANGED_BIT, &UDRS->flags);
+ set_bit(FD_VERIFY_BIT, &UDRS->flags);
+ process_fd_request();
+ return ret;
+ case FDCLRPRM:
+ if (lock_fdc(drive, true))
+ return -EINTR;
+ current_type[drive] = NULL;
+ floppy_sizes[drive] = MAX_DISK_SIZE << 1;
+ UDRS->keep_data = 0;
+ return invalidate_drive(bdev);
+ case FDSETPRM:
+ case FDDEFPRM:
+ return set_geometry(cmd, &inparam.g, drive, type, bdev);
+ case FDGETPRM:
+ ret = get_floppy_geometry(drive, type,
+ (struct floppy_struct **)&outparam);
+ if (ret)
+ return ret;
+ break;
+ case FDMSGON:
+ UDP->flags |= FTD_MSG;
+ return 0;
+ case FDMSGOFF:
+ UDP->flags &= ~FTD_MSG;
+ return 0;
+ case FDFMTBEG:
+ if (lock_fdc(drive, true))
+ return -EINTR;
+ if (poll_drive(true, FD_RAW_NEED_DISK) == -EINTR)
+ return -EINTR;
+ 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:
+ if (lock_fdc(drive, true))
+ return -EINTR;
+ return invalidate_drive(bdev);
+ case FDSETEMSGTRESH:
+ UDP->max_errors.reporting = (unsigned short)(param & 0x0f);
+ return 0;
+ case FDGETMAXERRS:
+ outparam = &UDP->max_errors;
+ break;
+ case FDSETMAXERRS:
+ UDP->max_errors = inparam.max_errors;
+ break;
+ case FDGETDRVTYP:
+ outparam = drive_name(type, drive);
+ SUPBOUND(size, strlen((const char *)outparam) + 1);
+ break;
+ case FDSETDRVPRM:
+ *UDP = inparam.dp;
+ break;
+ case FDGETDRVPRM:
+ outparam = UDP;
+ break;
+ case FDPOLLDRVSTAT:
+ if (lock_fdc(drive, true))
+ return -EINTR;
+ if (poll_drive(true, FD_RAW_NEED_DISK) == -EINTR)
+ return -EINTR;
+ process_fd_request();
+ /* fall through */
+ case FDGETDRVSTAT:
+ outparam = UDRS;
+ break;
+ case FDRESET:
+ return user_reset_fdc(drive, (int)param, true);
+ case FDGETFDCSTAT:
+ outparam = UFDCS;
+ break;
+ case FDWERRORCLR:
+ memset(UDRWE, 0, sizeof(*UDRWE));
+ return 0;
+ case FDWERRORGET:
+ outparam = UDRWE;
+ break;
+ case FDRAWCMD:
+ if (type)
+ return -EINVAL;
+ if (lock_fdc(drive, true))
+ return -EINTR;
+ set_floppy(drive);
+ i = raw_cmd_ioctl(cmd, (void __user *)param);
+ if (i == -EINTR)
+ return -EINTR;
+ process_fd_request();
+ return i;
+ case FDTWADDLE:
+ if (lock_fdc(drive, true))
+ return -EINTR;
+ twaddle();
+ process_fd_request();
+ return 0;
+ default:
+ return -EINVAL;
+ }
+
+ if (_IOC_DIR(cmd) & _IOC_READ)
+ return fd_copyout((void __user *)param, outparam, size);
+
+ return 0;
+}
+
+static int fd_ioctl(struct block_device *bdev, fmode_t mode,
+ unsigned int cmd, unsigned long param)
+{
+ int ret;
+
+ mutex_lock(&floppy_mutex);
+ ret = fd_locked_ioctl(bdev, mode, cmd, param);
+ mutex_unlock(&floppy_mutex);
+
+ return ret;
+}
+
+static void __init config_types(void)
+{
+ bool has_drive = false;
+ 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;
+
+ /* FIXME: 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 < ARRAY_SIZE(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 (!has_drive) {
+ prepend = "";
+ has_drive = true;
+ pr_info("Floppy drive(s):");
+ } else {
+ prepend = ",";
+ }
+
+ pr_cont("%s fd%d is %s", prepend, drive, name);
+ }
+ *UDP = *params;
+ }
+
+ if (has_drive)
+ pr_cont("\n");
+}
+
+static void floppy_release(struct gendisk *disk, fmode_t mode)
+{
+ int drive = (long)disk->private_data;
+
+ mutex_lock(&floppy_mutex);
+ mutex_lock(&open_lock);
+ if (!UDRS->fd_ref--) {
+ DPRINT("floppy_release with fd_ref == 0");
+ UDRS->fd_ref = 0;
+ }
+ if (!UDRS->fd_ref)
+ opened_bdev[drive] = NULL;
+ mutex_unlock(&open_lock);
+ mutex_unlock(&floppy_mutex);
+}
+
+/*
+ * floppy_open check for aliasing (/dev/fd0 can be the same as
+ * /dev/PS0 etc), and disallows simultaneous access to the same
+ * drive with different device numbers.
+ */
+static int floppy_open(struct block_device *bdev, fmode_t mode)
+{
+ int drive = (long)bdev->bd_disk->private_data;
+ int old_dev, new_dev;
+ int try;
+ int res = -EBUSY;
+ char *tmp;
+
+ mutex_lock(&floppy_mutex);
+ mutex_lock(&open_lock);
+ old_dev = UDRS->fd_device;
+ if (opened_bdev[drive] && opened_bdev[drive] != bdev)
+ goto out2;
+
+ if (!UDRS->fd_ref && (UDP->flags & FD_BROKEN_DCL)) {
+ set_bit(FD_DISK_CHANGED_BIT, &UDRS->flags);
+ set_bit(FD_VERIFY_BIT, &UDRS->flags);
+ }
+
+ UDRS->fd_ref++;
+
+ opened_bdev[drive] = 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 memory\n");
+ 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;
+ }
+ }
+
+ new_dev = MINOR(bdev->bd_dev);
+ UDRS->fd_device = new_dev;
+ set_capacity(disks[drive], floppy_sizes[new_dev]);
+ if (old_dev != -1 && old_dev != new_dev) {
+ if (buffer_drive == drive)
+ buffer_track = -1;
+ }
+
+ if (UFDCS->rawcmd == 1)
+ UFDCS->rawcmd = 2;
+
+ if (!(mode & FMODE_NDELAY)) {
+ if (mode & (FMODE_READ|FMODE_WRITE)) {
+ UDRS->last_checked = 0;
+ clear_bit(FD_OPEN_SHOULD_FAIL_BIT, &UDRS->flags);
+ check_disk_change(bdev);
+ if (test_bit(FD_DISK_CHANGED_BIT, &UDRS->flags))
+ goto out;
+ if (test_bit(FD_OPEN_SHOULD_FAIL_BIT, &UDRS->flags))
+ goto out;
+ }
+ res = -EROFS;
+ if ((mode & FMODE_WRITE) &&
+ !test_bit(FD_DISK_WRITABLE_BIT, &UDRS->flags))
+ goto out;
+ }
+ mutex_unlock(&open_lock);
+ mutex_unlock(&floppy_mutex);
+ return 0;
+out:
+ UDRS->fd_ref--;
+
+ if (!UDRS->fd_ref)
+ opened_bdev[drive] = NULL;
+out2:
+ mutex_unlock(&open_lock);
+ mutex_unlock(&floppy_mutex);
+ return res;
+}
+
+/*
+ * Check if the disk has been changed or if a change has been faked.
+ */
+static unsigned int floppy_check_events(struct gendisk *disk,
+ unsigned int clearing)
+{
+ int drive = (long)disk->private_data;
+
+ if (test_bit(FD_DISK_CHANGED_BIT, &UDRS->flags) ||
+ test_bit(FD_VERIFY_BIT, &UDRS->flags))
+ return DISK_EVENT_MEDIA_CHANGE;
+
+ if (time_after(jiffies, UDRS->last_checked + UDP->checkfreq)) {
+ lock_fdc(drive, false);
+ poll_drive(false, 0);
+ process_fd_request();
+ }
+
+ if (test_bit(FD_DISK_CHANGED_BIT, &UDRS->flags) ||
+ test_bit(FD_VERIFY_BIT, &UDRS->flags) ||
+ test_bit(drive, &fake_change) ||
+ drive_no_geom(drive))
+ return DISK_EVENT_MEDIA_CHANGE;
+ 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.
+ */
+
+struct rb0_cbdata {
+ int drive;
+ struct completion complete;
+};
+
+static void floppy_rb0_cb(struct bio *bio, int err)
+{
+ struct rb0_cbdata *cbdata = (struct rb0_cbdata *)bio->bi_private;
+ int drive = cbdata->drive;
+
+ if (err) {
+ pr_info("floppy: error %d while reading block 0\n", err);
+ set_bit(FD_OPEN_SHOULD_FAIL_BIT, &UDRS->flags);
+ }
+ complete(&cbdata->complete);
+}
+
+static int __floppy_read_block_0(struct block_device *bdev, int drive)
+{
+ struct bio bio;
+ struct bio_vec bio_vec;
+ struct page *page;
+ struct rb0_cbdata cbdata;
+ size_t size;
+
+ page = alloc_page(GFP_NOIO);
+ if (!page) {
+ process_fd_request();
+ return -ENOMEM;
+ }
+
+ size = bdev->bd_block_size;
+ if (!size)
+ size = 1024;
+
+ cbdata.drive = drive;
+
+ 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_iter.bi_size = size;
+ bio.bi_bdev = bdev;
+ bio.bi_iter.bi_sector = 0;
+ bio.bi_flags |= (1 << BIO_QUIET);
+ bio.bi_private = &cbdata;
+ bio.bi_end_io = floppy_rb0_cb;
+
+ submit_bio(READ, &bio);
+ process_fd_request();
+
+ init_completion(&cbdata.complete);
+ wait_for_completion(&cbdata.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;
+ int cf;
+ int res = 0;
+
+ if (test_bit(FD_DISK_CHANGED_BIT, &UDRS->flags) ||
+ test_bit(FD_VERIFY_BIT, &UDRS->flags) ||
+ test_bit(drive, &fake_change) ||
+ drive_no_geom(drive)) {
+ if (WARN(atomic_read(&usage_count) == 0,
+ "VFS: revalidate called on non-open device.\n"))
+ return -EFAULT;
+
+ lock_fdc(drive, false);
+ cf = (test_bit(FD_DISK_CHANGED_BIT, &UDRS->flags) ||
+ test_bit(FD_VERIFY_BIT, &UDRS->flags));
+ if (!(cf || test_bit(drive, &fake_change) || drive_no_geom(drive))) {
+ 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);
+ clear_bit(FD_DISK_CHANGED_BIT, &UDRS->flags);
+ if (cf)
+ UDRS->generation++;
+ if (drive_no_geom(drive)) {
+ /* auto-sensing */
+ res = __floppy_read_block_0(opened_bdev[drive], drive);
+ } else {
+ if (cf)
+ poll_drive(false, FD_RAW_NEED_DISK);
+ process_fd_request();
+ }
+ }
+ set_capacity(disk, floppy_sizes[UDRS->fd_device]);
+ return res;
+}
+
+static const struct block_device_operations floppy_fops = {
+ .owner = THIS_MODULE,
+ .open = floppy_open,
+ .release = floppy_release,
+ .ioctl = fd_ioctl,
+ .getgeo = fd_getgeo,
+ .check_events = floppy_check_events,
+ .revalidate_disk = floppy_revalidate,
+};
+
+/*
+ * 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;
+ r = result();
+ if (r <= 0x00)
+ return FDC_NONE; /* No FDC present ??? */
+ if ((r == 1) && (reply_buffer[0] == 0x80)) {
+ pr_info("FDC %d is an 8272A\n", fdc);
+ return FDC_8272A; /* 8272a/765 don't know DUMPREGS */
+ }
+ if (r != 10) {
+ pr_info("FDC %d init: DUMPREGS: unexpected return of %d bytes.\n",
+ fdc, r);
+ return FDC_UNKNOWN;
+ }
+
+ if (!fdc_configure()) {
+ pr_info("FDC %d is an 82072\n", fdc);
+ return FDC_82072; /* 82072 doesn't know CONFIGURE */
+ }
+
+ output_byte(FD_PERPENDICULAR);
+ if (need_more_output() == MORE_OUTPUT) {
+ output_byte(0);
+ } else {
+ pr_info("FDC %d is an 82072A\n", fdc);
+ return FDC_82072A; /* 82072A as found on Sparcs. */
+ }
+
+ output_byte(FD_UNLOCK);
+ r = result();
+ if ((r == 1) && (reply_buffer[0] == 0x80)) {
+ pr_info("FDC %d is a pre-1991 82077\n", fdc);
+ return FDC_82077_ORIG; /* Pre-1991 82077, doesn't know
+ * LOCK/UNLOCK */
+ }
+ if ((r != 1) || (reply_buffer[0] != 0x00)) {
+ pr_info("FDC %d init: UNLOCK: unexpected return of %d bytes.\n",
+ fdc, r);
+ return FDC_UNKNOWN;
+ }
+ output_byte(FD_PARTID);
+ r = result();
+ if (r != 1) {
+ pr_info("FDC %d init: PARTID: unexpected return of %d bytes.\n",
+ fdc, r);
+ return FDC_UNKNOWN;
+ }
+ if (reply_buffer[0] == 0x80) {
+ pr_info("FDC %d is a post-1991 82077\n", fdc);
+ return FDC_82077; /* Revised 82077AA passes all the tests */
+ }
+ switch (reply_buffer[0] >> 5) {
+ case 0x0:
+ /* Either a 82078-1 or a 82078SL running at 5Volt */
+ pr_info("FDC %d is an 82078.\n", fdc);
+ return FDC_82078;
+ case 0x1:
+ pr_info("FDC %d is a 44pin 82078\n", fdc);
+ return FDC_82078;
+ case 0x2:
+ pr_info("FDC %d is a S82078B\n", fdc);
+ return FDC_S82078B;
+ case 0x3:
+ pr_info("FDC %d is a National Semiconductor PC87306\n", fdc);
+ return FDC_87306;
+ default:
+ pr_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%x\n", 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 hardware\n", 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 CMOS\n");
+ return;
+ }
+ current_drive = ints[1];
+ if (current_drive < 0 || current_drive >= 8) {
+ DPRINT("bad drive for set_cmos\n");
+ return;
+ }
+#if N_FDC > 1
+ if (current_drive >= 4 && !FDC2)
+ FDC2 = 0x370;
+#endif
+ DP->cmos = ints[2];
+ DPRINT("setting CMOS code to %d\n", ints[2]);
+}
+
+static struct param_table {
+ const char *name;
+ void (*fn) (int *ints, int param, int 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=%d\n", 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++)
+ pr_cont(" %s", config_params[i].name);
+ pr_cont("\n");
+ } else
+ DPRINT("botched floppy option\n");
+ DPRINT("Read Documentation/blockdev/floppy.txt\n");
+ 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 = to_platform_device(dev);
+ int drive;
+
+ drive = p->id;
+ return sprintf(buf, "%X\n", UDP->cmos);
+}
+
+static DEVICE_ATTR(cmos, S_IRUGO, floppy_cmos_show, NULL);
+
+static struct attribute *floppy_dev_attrs[] = {
+ &dev_attr_cmos.attr,
+ NULL
+};
+
+ATTRIBUTE_GROUPS(floppy_dev);
+
+static void floppy_device_release(struct device *dev)
+{
+}
+
+static int floppy_resume(struct device *dev)
+{
+ int fdc;
+
+ for (fdc = 0; fdc < N_FDC; fdc++)
+ if (FDCS->address != -1)
+ user_reset_fdc(-1, FD_RESET_ALWAYS, false);
+
+ return 0;
+}
+
+static const struct dev_pm_ops floppy_pm_ops = {
+ .resume = floppy_resume,
+ .restore = floppy_resume,
+};
+
+static struct platform_driver floppy_driver = {
+ .driver = {
+ .name = "floppy",
+ .pm = &floppy_pm_ops,
+ },
+};
+
+static struct platform_device floppy_device[N_DRIVE];
+
+static bool floppy_available(int drive)
+{
+ if (!(allowed_drive_mask & (1 << drive)))
+ return false;
+ if (fdc_state[FDC(drive)].version == FDC_NONE)
+ return false;
+ return true;
+}
+
+static struct kobject *floppy_find(dev_t dev, int *part, void *data)
+{
+ int drive = (*part & 3) | ((*part & 0x80) >> 5);
+ if (drive >= N_DRIVE || !floppy_available(drive))
+ return NULL;
+ if (((*part >> 2) & 0x1f) >= ARRAY_SIZE(floppy_type))
+ return NULL;
+ *part = 0;
+ return get_disk(disks[drive]);
+}
+
+static int __init do_floppy_init(void)
+{
+ int i, unit, drive, err;
+
+ set_debugt();
+ interruptjiffies = resultjiffies = jiffies;
+
+#if defined(CONFIG_PPC)
+ if (check_legacy_ioport(FDC1))
+ return -ENODEV;
+#endif
+
+ raw_cmd = NULL;
+
+ floppy_wq = alloc_ordered_workqueue("floppy", 0);
+ if (!floppy_wq)
+ return -ENOMEM;
+
+ for (drive = 0; drive < N_DRIVE; drive++) {
+ disks[drive] = alloc_disk(1);
+ if (!disks[drive]) {
+ err = -ENOMEM;
+ goto out_put_disk;
+ }
+
+ disks[drive]->queue = blk_init_queue(do_fd_request, &floppy_lock);
+ if (!disks[drive]->queue) {
+ err = -ENOMEM;
+ goto out_put_disk;
+ }
+
+ blk_queue_max_hw_sectors(disks[drive]->queue, 64);
+ disks[drive]->major = FLOPPY_MAJOR;
+ disks[drive]->first_minor = TOMINOR(drive);
+ disks[drive]->fops = &floppy_fops;
+ sprintf(disks[drive]->disk_name, "fd%d", drive);
+
+ init_timer(&motor_off_timer[drive]);
+ motor_off_timer[drive].data = drive;
+ motor_off_timer[drive].function = motor_off_callback;
+ }
+
+ err = register_blkdev(FLOPPY_MAJOR, "fd");
+ if (err)
+ goto out_put_disk;
+
+ err = platform_driver_register(&floppy_driver);
+ if (err)
+ goto out_unreg_blkdev;
+
+ 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");
+ config_types();
+
+ for (i = 0; i < N_FDC; i++) {
+ fdc = i;
+ memset(FDCS, 0, sizeof(*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;
+ fdc_state[0].address = FDC1;
+ if (fdc_state[0].address == -1) {
+ cancel_delayed_work(&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) {
+ cancel_delayed_work(&fd_timeout);
+ err = -EBUSY;
+ goto out_unreg_region;
+ }
+
+ /* initialise drive state */
+ for (drive = 0; drive < N_DRIVE; drive++) {
+ memset(UDRS, 0, sizeof(*UDRS));
+ memset(UDRWE, 0, sizeof(*UDRWE));
+ set_bit(FD_DISK_NEWCHANGE_BIT, &UDRS->flags);
+ set_bit(FD_DISK_CHANGED_BIT, &UDRS->flags);
+ set_bit(FD_VERIFY_BIT, &UDRS->flags);
+ 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, false)) {
+ /* free ioports reserved by floppy_grab_irq_and_dma() */
+ floppy_release_regions(fdc);
+ 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() */
+ floppy_release_regions(fdc);
+ 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, false);
+ }
+ fdc = 0;
+ cancel_delayed_work(&fd_timeout);
+ current_drive = 0;
+ initialized = true;
+ if (have_no_fdc) {
+ DPRINT("no floppy controllers found\n");
+ err = have_no_fdc;
+ goto out_release_dma;
+ }
+
+ for (drive = 0; drive < N_DRIVE; drive++) {
+ if (!floppy_available(drive))
+ continue;
+
+ floppy_device[drive].name = floppy_device_name;
+ floppy_device[drive].id = drive;
+ floppy_device[drive].dev.release = floppy_device_release;
+ floppy_device[drive].dev.groups = floppy_dev_groups;
+
+ err = platform_device_register(&floppy_device[drive]);
+ if (err)
+ goto out_remove_drives;
+
+ /* to be cleaned up... */
+ disks[drive]->private_data = (void *)(long)drive;
+ disks[drive]->flags |= GENHD_FL_REMOVABLE;
+ disks[drive]->driverfs_dev = &floppy_device[drive].dev;
+ add_disk(disks[drive]);
+ }
+
+ return 0;
+
+out_remove_drives:
+ while (drive--) {
+ if (floppy_available(drive)) {
+ del_gendisk(disks[drive]);
+ platform_device_unregister(&floppy_device[drive]);
+ }
+ }
+out_release_dma:
+ if (atomic_read(&usage_count))
+ floppy_release_irq_and_dma();
+out_unreg_region:
+ blk_unregister_region(MKDEV(FLOPPY_MAJOR, 0), 256);
+ platform_driver_unregister(&floppy_driver);
+out_unreg_blkdev:
+ unregister_blkdev(FLOPPY_MAJOR, "fd");
+out_put_disk:
+ destroy_workqueue(floppy_wq);
+ for (drive = 0; drive < N_DRIVE; drive++) {
+ if (!disks[drive])
+ break;
+ if (disks[drive]->queue) {
+ del_timer_sync(&motor_off_timer[drive]);
+ blk_cleanup_queue(disks[drive]->queue);
+ disks[drive]->queue = NULL;
+ }
+ put_disk(disks[drive]);
+ }
+ return err;
+}
+
+#ifndef MODULE
+static __init void floppy_async_init(void *data, async_cookie_t cookie)
+{
+ do_floppy_init();
+}
+#endif
+
+static int __init floppy_init(void)
+{
+#ifdef MODULE
+ return do_floppy_init();
+#else
+ /* Don't hold up the bootup by the floppy initialization */
+ async_schedule(floppy_async_init, NULL);
+ return 0;
+#endif
+}
+
+static const struct io_region {
+ int offset;
+ int size;
+} io_regions[] = {
+ { 2, 1 },
+ /* address + 3 is sometimes reserved by pnp bios for motherboard */
+ { 4, 2 },
+ /* address + 6 is reserved, and may be taken by IDE.
+ * Unfortunately, Adaptec doesn't know this :-(, */
+ { 7, 1 },
+};
+
+static void floppy_release_allocated_regions(int fdc, const struct io_region *p)
+{
+ while (p != io_regions) {
+ p--;
+ release_region(FDCS->address + p->offset, p->size);
+ }
+}
+
+#define ARRAY_END(X) (&((X)[ARRAY_SIZE(X)]))
+
+static int floppy_request_regions(int fdc)
+{
+ const struct io_region *p;
+
+ for (p = io_regions; p < ARRAY_END(io_regions); p++) {
+ if (!request_region(FDCS->address + p->offset,
+ p->size, "floppy")) {
+ DPRINT("Floppy io-port 0x%04lx in use\n",
+ FDCS->address + p->offset);
+ floppy_release_allocated_regions(fdc, p);
+ return -EBUSY;
+ }
+ }
+ return 0;
+}
+
+static void floppy_release_regions(int fdc)
+{
+ floppy_release_allocated_regions(fdc, ARRAY_END(io_regions));
+}
+
+static int floppy_grab_irq_and_dma(void)
+{
+ if (atomic_inc_return(&usage_count) > 1)
+ return 0;
+
+ /*
+ * We might have scheduled a free_irq(), wait it to
+ * drain first:
+ */
+ flush_workqueue(floppy_wq);
+
+ if (fd_request_irq()) {
+ DPRINT("Unable to grab IRQ%d for the floppy driver\n",
+ FLOPPY_IRQ);
+ atomic_dec(&usage_count);
+ return -1;
+ }
+ if (fd_request_dma()) {
+ DPRINT("Unable to grab DMA%d for the floppy driver\n",
+ FLOPPY_DMA);
+ if (can_use_virtual_dma & 2)
+ use_virtual_dma = can_use_virtual_dma = 1;
+ if (!(can_use_virtual_dma & 1)) {
+ fd_free_irq();
+ atomic_dec(&usage_count);
+ return -1;
+ }
+ }
+
+ for (fdc = 0; fdc < N_FDC; fdc++) {
+ if (FDCS->address != -1) {
+ if (floppy_request_regions(fdc))
+ goto cleanup;
+ }
+ }
+ 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;
+cleanup:
+ fd_free_irq();
+ fd_free_dma();
+ while (--fdc >= 0)
+ floppy_release_regions(fdc);
+ atomic_dec(&usage_count);
+ return -1;
+}
+
+static void floppy_release_irq_and_dma(void)
+{
+ int old_fdc;
+#ifndef __sparc__
+ int drive;
+#endif
+ long tmpsize;
+ unsigned long tmpaddr;
+
+ if (!atomic_dec_and_test(&usage_count))
+ return;
+
+ 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
+
+ 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);
+ }
+#ifndef __sparc__
+ for (drive = 0; drive < N_FDC * 4; drive++)
+ if (timer_pending(motor_off_timer + drive))
+ pr_info("motor off timer %d still active\n", drive);
+#endif
+
+ if (delayed_work_pending(&fd_timeout))
+ pr_info("floppy timer still active:%s\n", timeout_message);
+ if (delayed_work_pending(&fd_timer))
+ pr_info("auxiliary floppy timer still active\n");
+ if (work_pending(&floppy_work))
+ pr_info("work still pending\n");
+ old_fdc = fdc;
+ for (fdc = 0; fdc < N_FDC; fdc++)
+ if (FDCS->address != -1)
+ floppy_release_regions(fdc);
+ fdc = old_fdc;
+}
+
+#ifdef MODULE
+
+static char *floppy;
+
+static void __init parse_floppy_cfg_string(char *cfg)
+{
+ char *ptr;
+
+ while (*cfg) {
+ ptr = cfg;
+ while (*cfg && *cfg != ' ' && *cfg != '\t')
+ cfg++;
+ if (*cfg) {
+ *cfg = '\0';
+ cfg++;
+ }
+ if (*ptr)
+ floppy_setup(ptr);
+ }
+}
+
+static int __init floppy_module_init(void)
+{
+ if (floppy)
+ parse_floppy_cfg_string(floppy);
+ return floppy_init();
+}
+module_init(floppy_module_init);
+
+static void __exit floppy_module_exit(void)
+{
+ int drive;
+
+ blk_unregister_region(MKDEV(FLOPPY_MAJOR, 0), 256);
+ unregister_blkdev(FLOPPY_MAJOR, "fd");
+ platform_driver_unregister(&floppy_driver);
+
+ destroy_workqueue(floppy_wq);
+
+ for (drive = 0; drive < N_DRIVE; drive++) {
+ del_timer_sync(&motor_off_timer[drive]);
+
+ if (floppy_available(drive)) {
+ del_gendisk(disks[drive]);
+ platform_device_unregister(&floppy_device[drive]);
+ }
+ blk_cleanup_queue(disks[drive]->queue);
+
+ /*
+ * These disks have not called add_disk(). Don't put down
+ * queue reference in put_disk().
+ */
+ if (!(allowed_drive_mask & (1 << drive)) ||
+ fdc_state[FDC(drive)].version == FDC_NONE)
+ disks[drive]->queue = NULL;
+
+ put_disk(disks[drive]);
+ }
+
+ cancel_delayed_work_sync(&fd_timeout);
+ cancel_delayed_work_sync(&fd_timer);
+
+ if (atomic_read(&usage_count))
+ floppy_release_irq_and_dma();
+
+ /* eject disk, if any */
+ fd_eject(0);
+}
+
+module_exit(floppy_module_exit);
+
+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");
+
+/* This doesn't actually get used other than for module information */
+static const struct pnp_device_id floppy_pnpids[] = {
+ {"PNP0700", 0},
+ {}
+};
+
+MODULE_DEVICE_TABLE(pnp, floppy_pnpids);
+
+#else
+
+__setup("floppy=", floppy_setup);
+module_init(floppy_init)
+#endif
+
+MODULE_ALIAS_BLOCKDEV_MAJOR(FLOPPY_MAJOR);
Code Review / kvmfornfv.git / blobdiff