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xemu/hw/fdc.c
Hervé Poussineau d497d53497 fdc: use status0 field instead of a local variable 
Signed-off-by: Hervé Poussineau <hpoussin@reactos.org>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-11-14 18:19:22 +01:00

2282 lines
69 KiB
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/*
* QEMU Floppy disk emulator (Intel 82078)
*
* Copyright (c) 2003, 2007 Jocelyn Mayer
* Copyright (c) 2008 Hervé Poussineau
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
/*
* The controller is used in Sun4m systems in a slightly different
* way. There are changes in DOR register and DMA is not available.
*/
#include "hw.h"
#include "fdc.h"
#include "qemu-error.h"
#include "qemu-timer.h"
#include "isa.h"
#include "sysbus.h"
#include "qdev-addr.h"
#include "blockdev.h"
#include "sysemu.h"
#include "qemu-log.h"
/********************************************************/
/* debug Floppy devices */
//#define DEBUG_FLOPPY
#ifdef DEBUG_FLOPPY
#define FLOPPY_DPRINTF(fmt, ...) \
do { printf("FLOPPY: " fmt , ## __VA_ARGS__); } while (0)
#else
#define FLOPPY_DPRINTF(fmt, ...)
#endif
/********************************************************/
/* Floppy drive emulation */
typedef enum FDriveRate {
FDRIVE_RATE_500K = 0x00, /* 500 Kbps */
FDRIVE_RATE_300K = 0x01, /* 300 Kbps */
FDRIVE_RATE_250K = 0x02, /* 250 Kbps */
FDRIVE_RATE_1M = 0x03, /* 1 Mbps */
} FDriveRate;
typedef struct FDFormat {
FDriveType drive;
uint8_t last_sect;
uint8_t max_track;
uint8_t max_head;
FDriveRate rate;
} FDFormat;
static const FDFormat fd_formats[] = {
/* First entry is default format */
/* 1.44 MB 3"1/2 floppy disks */
{ FDRIVE_DRV_144, 18, 80, 1, FDRIVE_RATE_500K, },
{ FDRIVE_DRV_144, 20, 80, 1, FDRIVE_RATE_500K, },
{ FDRIVE_DRV_144, 21, 80, 1, FDRIVE_RATE_500K, },
{ FDRIVE_DRV_144, 21, 82, 1, FDRIVE_RATE_500K, },
{ FDRIVE_DRV_144, 21, 83, 1, FDRIVE_RATE_500K, },
{ FDRIVE_DRV_144, 22, 80, 1, FDRIVE_RATE_500K, },
{ FDRIVE_DRV_144, 23, 80, 1, FDRIVE_RATE_500K, },
{ FDRIVE_DRV_144, 24, 80, 1, FDRIVE_RATE_500K, },
/* 2.88 MB 3"1/2 floppy disks */
{ FDRIVE_DRV_288, 36, 80, 1, FDRIVE_RATE_1M, },
{ FDRIVE_DRV_288, 39, 80, 1, FDRIVE_RATE_1M, },
{ FDRIVE_DRV_288, 40, 80, 1, FDRIVE_RATE_1M, },
{ FDRIVE_DRV_288, 44, 80, 1, FDRIVE_RATE_1M, },
{ FDRIVE_DRV_288, 48, 80, 1, FDRIVE_RATE_1M, },
/* 720 kB 3"1/2 floppy disks */
{ FDRIVE_DRV_144, 9, 80, 1, FDRIVE_RATE_250K, },
{ FDRIVE_DRV_144, 10, 80, 1, FDRIVE_RATE_250K, },
{ FDRIVE_DRV_144, 10, 82, 1, FDRIVE_RATE_250K, },
{ FDRIVE_DRV_144, 10, 83, 1, FDRIVE_RATE_250K, },
{ FDRIVE_DRV_144, 13, 80, 1, FDRIVE_RATE_250K, },
{ FDRIVE_DRV_144, 14, 80, 1, FDRIVE_RATE_250K, },
/* 1.2 MB 5"1/4 floppy disks */
{ FDRIVE_DRV_120, 15, 80, 1, FDRIVE_RATE_500K, },
{ FDRIVE_DRV_120, 18, 80, 1, FDRIVE_RATE_500K, },
{ FDRIVE_DRV_120, 18, 82, 1, FDRIVE_RATE_500K, },
{ FDRIVE_DRV_120, 18, 83, 1, FDRIVE_RATE_500K, },
{ FDRIVE_DRV_120, 20, 80, 1, FDRIVE_RATE_500K, },
/* 720 kB 5"1/4 floppy disks */
{ FDRIVE_DRV_120, 9, 80, 1, FDRIVE_RATE_250K, },
{ FDRIVE_DRV_120, 11, 80, 1, FDRIVE_RATE_250K, },
/* 360 kB 5"1/4 floppy disks */
{ FDRIVE_DRV_120, 9, 40, 1, FDRIVE_RATE_300K, },
{ FDRIVE_DRV_120, 9, 40, 0, FDRIVE_RATE_300K, },
{ FDRIVE_DRV_120, 10, 41, 1, FDRIVE_RATE_300K, },
{ FDRIVE_DRV_120, 10, 42, 1, FDRIVE_RATE_300K, },
/* 320 kB 5"1/4 floppy disks */
{ FDRIVE_DRV_120, 8, 40, 1, FDRIVE_RATE_250K, },
{ FDRIVE_DRV_120, 8, 40, 0, FDRIVE_RATE_250K, },
/* 360 kB must match 5"1/4 better than 3"1/2... */
{ FDRIVE_DRV_144, 9, 80, 0, FDRIVE_RATE_250K, },
/* end */
{ FDRIVE_DRV_NONE, -1, -1, 0, 0, },
};
static void pick_geometry(BlockDriverState *bs, int *nb_heads,
int *max_track, int *last_sect,
FDriveType drive_in, FDriveType *drive,
FDriveRate *rate)
{
const FDFormat *parse;
uint64_t nb_sectors, size;
int i, first_match, match;
bdrv_get_geometry(bs, &nb_sectors);
match = -1;
first_match = -1;
for (i = 0; ; i++) {
parse = &fd_formats[i];
if (parse->drive == FDRIVE_DRV_NONE) {
break;
}
if (drive_in == parse->drive ||
drive_in == FDRIVE_DRV_NONE) {
size = (parse->max_head + 1) * parse->max_track *
parse->last_sect;
if (nb_sectors == size) {
match = i;
break;
}
if (first_match == -1) {
first_match = i;
}
}
}
if (match == -1) {
if (first_match == -1) {
match = 1;
} else {
match = first_match;
}
parse = &fd_formats[match];
}
*nb_heads = parse->max_head + 1;
*max_track = parse->max_track;
*last_sect = parse->last_sect;
*drive = parse->drive;
*rate = parse->rate;
}
#define GET_CUR_DRV(fdctrl) ((fdctrl)->cur_drv)
#define SET_CUR_DRV(fdctrl, drive) ((fdctrl)->cur_drv = (drive))
/* Will always be a fixed parameter for us */
#define FD_SECTOR_LEN 512
#define FD_SECTOR_SC 2 /* Sector size code */
#define FD_RESET_SENSEI_COUNT 4 /* Number of sense interrupts on RESET */
typedef struct FDCtrl FDCtrl;
/* Floppy disk drive emulation */
typedef enum FDiskFlags {
FDISK_DBL_SIDES = 0x01,
} FDiskFlags;
typedef struct FDrive {
FDCtrl *fdctrl;
BlockDriverState *bs;
/* Drive status */
FDriveType drive;
uint8_t perpendicular; /* 2.88 MB access mode */
/* Position */
uint8_t head;
uint8_t track;
uint8_t sect;
/* Media */
FDiskFlags flags;
uint8_t last_sect; /* Nb sector per track */
uint8_t max_track; /* Nb of tracks */
uint16_t bps; /* Bytes per sector */
uint8_t ro; /* Is read-only */
uint8_t media_changed; /* Is media changed */
uint8_t media_rate; /* Data rate of medium */
} FDrive;
static void fd_init(FDrive *drv)
{
/* Drive */
drv->drive = FDRIVE_DRV_NONE;
drv->perpendicular = 0;
/* Disk */
drv->last_sect = 0;
drv->max_track = 0;
}
#define NUM_SIDES(drv) ((drv)->flags & FDISK_DBL_SIDES ? 2 : 1)
static int fd_sector_calc(uint8_t head, uint8_t track, uint8_t sect,
uint8_t last_sect, uint8_t num_sides)
{
return (((track * num_sides) + head) * last_sect) + sect - 1;
}
/* Returns current position, in sectors, for given drive */
static int fd_sector(FDrive *drv)
{
return fd_sector_calc(drv->head, drv->track, drv->sect, drv->last_sect,
NUM_SIDES(drv));
}
/* Seek to a new position:
* returns 0 if already on right track
* returns 1 if track changed
* returns 2 if track is invalid
* returns 3 if sector is invalid
* returns 4 if seek is disabled
*/
static int fd_seek(FDrive *drv, uint8_t head, uint8_t track, uint8_t sect,
int enable_seek)
{
uint32_t sector;
int ret;
if (track > drv->max_track ||
(head != 0 && (drv->flags & FDISK_DBL_SIDES) == 0)) {
FLOPPY_DPRINTF("try to read %d %02x %02x (max=%d %d %02x %02x)\n",
head, track, sect, 1,
(drv->flags & FDISK_DBL_SIDES) == 0 ? 0 : 1,
drv->max_track, drv->last_sect);
return 2;
}
if (sect > drv->last_sect) {
FLOPPY_DPRINTF("try to read %d %02x %02x (max=%d %d %02x %02x)\n",
head, track, sect, 1,
(drv->flags & FDISK_DBL_SIDES) == 0 ? 0 : 1,
drv->max_track, drv->last_sect);
return 3;
}
sector = fd_sector_calc(head, track, sect, drv->last_sect, NUM_SIDES(drv));
ret = 0;
if (sector != fd_sector(drv)) {
#if 0
if (!enable_seek) {
FLOPPY_DPRINTF("error: no implicit seek %d %02x %02x"
" (max=%d %02x %02x)\n",
head, track, sect, 1, drv->max_track,
drv->last_sect);
return 4;
}
#endif
drv->head = head;
if (drv->track != track) {
if (drv->bs != NULL && bdrv_is_inserted(drv->bs)) {
drv->media_changed = 0;
}
ret = 1;
}
drv->track = track;
drv->sect = sect;
}
if (drv->bs == NULL || !bdrv_is_inserted(drv->bs)) {
ret = 2;
}
return ret;
}
/* Set drive back to track 0 */
static void fd_recalibrate(FDrive *drv)
{
FLOPPY_DPRINTF("recalibrate\n");
fd_seek(drv, 0, 0, 1, 1);
}
/* Revalidate a disk drive after a disk change */
static void fd_revalidate(FDrive *drv)
{
int nb_heads, max_track, last_sect, ro;
FDriveType drive;
FDriveRate rate;
FLOPPY_DPRINTF("revalidate\n");
if (drv->bs != NULL) {
ro = bdrv_is_read_only(drv->bs);
pick_geometry(drv->bs, &nb_heads, &max_track,
&last_sect, drv->drive, &drive, &rate);
if (!bdrv_is_inserted(drv->bs)) {
FLOPPY_DPRINTF("No disk in drive\n");
} else {
FLOPPY_DPRINTF("Floppy disk (%d h %d t %d s) %s\n", nb_heads,
max_track, last_sect, ro ? "ro" : "rw");
}
if (nb_heads == 1) {
drv->flags &= ~FDISK_DBL_SIDES;
} else {
drv->flags |= FDISK_DBL_SIDES;
}
drv->max_track = max_track;
drv->last_sect = last_sect;
drv->ro = ro;
drv->drive = drive;
drv->media_rate = rate;
} else {
FLOPPY_DPRINTF("No drive connected\n");
drv->last_sect = 0;
drv->max_track = 0;
drv->flags &= ~FDISK_DBL_SIDES;
}
}
/********************************************************/
/* Intel 82078 floppy disk controller emulation */
static void fdctrl_reset(FDCtrl *fdctrl, int do_irq);
static void fdctrl_reset_fifo(FDCtrl *fdctrl);
static int fdctrl_transfer_handler (void *opaque, int nchan,
int dma_pos, int dma_len);
static void fdctrl_raise_irq(FDCtrl *fdctrl);
static FDrive *get_cur_drv(FDCtrl *fdctrl);
static uint32_t fdctrl_read_statusA(FDCtrl *fdctrl);
static uint32_t fdctrl_read_statusB(FDCtrl *fdctrl);
static uint32_t fdctrl_read_dor(FDCtrl *fdctrl);
static void fdctrl_write_dor(FDCtrl *fdctrl, uint32_t value);
static uint32_t fdctrl_read_tape(FDCtrl *fdctrl);
static void fdctrl_write_tape(FDCtrl *fdctrl, uint32_t value);
static uint32_t fdctrl_read_main_status(FDCtrl *fdctrl);
static void fdctrl_write_rate(FDCtrl *fdctrl, uint32_t value);
static uint32_t fdctrl_read_data(FDCtrl *fdctrl);
static void fdctrl_write_data(FDCtrl *fdctrl, uint32_t value);
static uint32_t fdctrl_read_dir(FDCtrl *fdctrl);
static void fdctrl_write_ccr(FDCtrl *fdctrl, uint32_t value);
enum {
FD_DIR_WRITE = 0,
FD_DIR_READ = 1,
FD_DIR_SCANE = 2,
FD_DIR_SCANL = 3,
FD_DIR_SCANH = 4,
};
enum {
FD_STATE_MULTI = 0x01, /* multi track flag */
FD_STATE_FORMAT = 0x02, /* format flag */
FD_STATE_SEEK = 0x04, /* seek flag */
};
enum {
FD_REG_SRA = 0x00,
FD_REG_SRB = 0x01,
FD_REG_DOR = 0x02,
FD_REG_TDR = 0x03,
FD_REG_MSR = 0x04,
FD_REG_DSR = 0x04,
FD_REG_FIFO = 0x05,
FD_REG_DIR = 0x07,
FD_REG_CCR = 0x07,
};
enum {
FD_CMD_READ_TRACK = 0x02,
FD_CMD_SPECIFY = 0x03,
FD_CMD_SENSE_DRIVE_STATUS = 0x04,
FD_CMD_WRITE = 0x05,
FD_CMD_READ = 0x06,
FD_CMD_RECALIBRATE = 0x07,
FD_CMD_SENSE_INTERRUPT_STATUS = 0x08,
FD_CMD_WRITE_DELETED = 0x09,
FD_CMD_READ_ID = 0x0a,
FD_CMD_READ_DELETED = 0x0c,
FD_CMD_FORMAT_TRACK = 0x0d,
FD_CMD_DUMPREG = 0x0e,
FD_CMD_SEEK = 0x0f,
FD_CMD_VERSION = 0x10,
FD_CMD_SCAN_EQUAL = 0x11,
FD_CMD_PERPENDICULAR_MODE = 0x12,
FD_CMD_CONFIGURE = 0x13,
FD_CMD_LOCK = 0x14,
FD_CMD_VERIFY = 0x16,
FD_CMD_POWERDOWN_MODE = 0x17,
FD_CMD_PART_ID = 0x18,
FD_CMD_SCAN_LOW_OR_EQUAL = 0x19,
FD_CMD_SCAN_HIGH_OR_EQUAL = 0x1d,
FD_CMD_SAVE = 0x2e,
FD_CMD_OPTION = 0x33,
FD_CMD_RESTORE = 0x4e,
FD_CMD_DRIVE_SPECIFICATION_COMMAND = 0x8e,
FD_CMD_RELATIVE_SEEK_OUT = 0x8f,
FD_CMD_FORMAT_AND_WRITE = 0xcd,
FD_CMD_RELATIVE_SEEK_IN = 0xcf,
};
enum {
FD_CONFIG_PRETRK = 0xff, /* Pre-compensation set to track 0 */
FD_CONFIG_FIFOTHR = 0x0f, /* FIFO threshold set to 1 byte */
FD_CONFIG_POLL = 0x10, /* Poll enabled */
FD_CONFIG_EFIFO = 0x20, /* FIFO disabled */
FD_CONFIG_EIS = 0x40, /* No implied seeks */
};
enum {
FD_SR0_DS0 = 0x01,
FD_SR0_DS1 = 0x02,
FD_SR0_HEAD = 0x04,
FD_SR0_EQPMT = 0x10,
FD_SR0_SEEK = 0x20,
FD_SR0_ABNTERM = 0x40,
FD_SR0_INVCMD = 0x80,
FD_SR0_RDYCHG = 0xc0,
};
enum {
FD_SR1_MA = 0x01, /* Missing address mark */
FD_SR1_NW = 0x02, /* Not writable */
FD_SR1_EC = 0x80, /* End of cylinder */
};
enum {
FD_SR2_SNS = 0x04, /* Scan not satisfied */
FD_SR2_SEH = 0x08, /* Scan equal hit */
};
enum {
FD_SRA_DIR = 0x01,
FD_SRA_nWP = 0x02,
FD_SRA_nINDX = 0x04,
FD_SRA_HDSEL = 0x08,
FD_SRA_nTRK0 = 0x10,
FD_SRA_STEP = 0x20,
FD_SRA_nDRV2 = 0x40,
FD_SRA_INTPEND = 0x80,
};
enum {
FD_SRB_MTR0 = 0x01,
FD_SRB_MTR1 = 0x02,
FD_SRB_WGATE = 0x04,
FD_SRB_RDATA = 0x08,
FD_SRB_WDATA = 0x10,
FD_SRB_DR0 = 0x20,
};
enum {
#if MAX_FD == 4
FD_DOR_SELMASK = 0x03,
#else
FD_DOR_SELMASK = 0x01,
#endif
FD_DOR_nRESET = 0x04,
FD_DOR_DMAEN = 0x08,
FD_DOR_MOTEN0 = 0x10,
FD_DOR_MOTEN1 = 0x20,
FD_DOR_MOTEN2 = 0x40,
FD_DOR_MOTEN3 = 0x80,
};
enum {
#if MAX_FD == 4
FD_TDR_BOOTSEL = 0x0c,
#else
FD_TDR_BOOTSEL = 0x04,
#endif
};
enum {
FD_DSR_DRATEMASK= 0x03,
FD_DSR_PWRDOWN = 0x40,
FD_DSR_SWRESET = 0x80,
};
enum {
FD_MSR_DRV0BUSY = 0x01,
FD_MSR_DRV1BUSY = 0x02,
FD_MSR_DRV2BUSY = 0x04,
FD_MSR_DRV3BUSY = 0x08,
FD_MSR_CMDBUSY = 0x10,
FD_MSR_NONDMA = 0x20,
FD_MSR_DIO = 0x40,
FD_MSR_RQM = 0x80,
};
enum {
FD_DIR_DSKCHG = 0x80,
};
#define FD_MULTI_TRACK(state) ((state) & FD_STATE_MULTI)
#define FD_DID_SEEK(state) ((state) & FD_STATE_SEEK)
#define FD_FORMAT_CMD(state) ((state) & FD_STATE_FORMAT)
struct FDCtrl {
MemoryRegion iomem;
qemu_irq irq;
/* Controller state */
QEMUTimer *result_timer;
int dma_chann;
/* Controller's identification */
uint8_t version;
/* HW */
uint8_t sra;
uint8_t srb;
uint8_t dor;
uint8_t dor_vmstate; /* only used as temp during vmstate */
uint8_t tdr;
uint8_t dsr;
uint8_t msr;
uint8_t cur_drv;
uint8_t status0;
uint8_t status1;
uint8_t status2;
/* Command FIFO */
uint8_t *fifo;
int32_t fifo_size;
uint32_t data_pos;
uint32_t data_len;
uint8_t data_state;
uint8_t data_dir;
uint8_t eot; /* last wanted sector */
/* States kept only to be returned back */
/* precompensation */
uint8_t precomp_trk;
uint8_t config;
uint8_t lock;
/* Power down config (also with status regB access mode */
uint8_t pwrd;
/* Floppy drives */
uint8_t num_floppies;
/* Sun4m quirks? */
int sun4m;
FDrive drives[MAX_FD];
int reset_sensei;
uint32_t check_media_rate;
/* Timers state */
uint8_t timer0;
uint8_t timer1;
};
typedef struct FDCtrlSysBus {
SysBusDevice busdev;
struct FDCtrl state;
} FDCtrlSysBus;
typedef struct FDCtrlISABus {
ISADevice busdev;
uint32_t iobase;
uint32_t irq;
uint32_t dma;
struct FDCtrl state;
int32_t bootindexA;
int32_t bootindexB;
} FDCtrlISABus;
static uint32_t fdctrl_read (void *opaque, uint32_t reg)
{
FDCtrl *fdctrl = opaque;
uint32_t retval;
reg &= 7;
switch (reg) {
case FD_REG_SRA:
retval = fdctrl_read_statusA(fdctrl);
break;
case FD_REG_SRB:
retval = fdctrl_read_statusB(fdctrl);
break;
case FD_REG_DOR:
retval = fdctrl_read_dor(fdctrl);
break;
case FD_REG_TDR:
retval = fdctrl_read_tape(fdctrl);
break;
case FD_REG_MSR:
retval = fdctrl_read_main_status(fdctrl);
break;
case FD_REG_FIFO:
retval = fdctrl_read_data(fdctrl);
break;
case FD_REG_DIR:
retval = fdctrl_read_dir(fdctrl);
break;
default:
retval = (uint32_t)(-1);
break;
}
FLOPPY_DPRINTF("read reg%d: 0x%02x\n", reg & 7, retval);
return retval;
}
static void fdctrl_write (void *opaque, uint32_t reg, uint32_t value)
{
FDCtrl *fdctrl = opaque;
FLOPPY_DPRINTF("write reg%d: 0x%02x\n", reg & 7, value);
reg &= 7;
switch (reg) {
case FD_REG_DOR:
fdctrl_write_dor(fdctrl, value);
break;
case FD_REG_TDR:
fdctrl_write_tape(fdctrl, value);
break;
case FD_REG_DSR:
fdctrl_write_rate(fdctrl, value);
break;
case FD_REG_FIFO:
fdctrl_write_data(fdctrl, value);
break;
case FD_REG_CCR:
fdctrl_write_ccr(fdctrl, value);
break;
default:
break;
}
}
static uint64_t fdctrl_read_mem (void *opaque, hwaddr reg,
unsigned ize)
{
return fdctrl_read(opaque, (uint32_t)reg);
}
static void fdctrl_write_mem (void *opaque, hwaddr reg,
uint64_t value, unsigned size)
{
fdctrl_write(opaque, (uint32_t)reg, value);
}
static const MemoryRegionOps fdctrl_mem_ops = {
.read = fdctrl_read_mem,
.write = fdctrl_write_mem,
.endianness = DEVICE_NATIVE_ENDIAN,
};
static const MemoryRegionOps fdctrl_mem_strict_ops = {
.read = fdctrl_read_mem,
.write = fdctrl_write_mem,
.endianness = DEVICE_NATIVE_ENDIAN,
.valid = {
.min_access_size = 1,
.max_access_size = 1,
},
};
static bool fdrive_media_changed_needed(void *opaque)
{
FDrive *drive = opaque;
return (drive->bs != NULL && drive->media_changed != 1);
}
static const VMStateDescription vmstate_fdrive_media_changed = {
.name = "fdrive/media_changed",
.version_id = 1,
.minimum_version_id = 1,
.minimum_version_id_old = 1,
.fields = (VMStateField[]) {
VMSTATE_UINT8(media_changed, FDrive),
VMSTATE_END_OF_LIST()
}
};
static bool fdrive_media_rate_needed(void *opaque)
{
FDrive *drive = opaque;
return drive->fdctrl->check_media_rate;
}
static const VMStateDescription vmstate_fdrive_media_rate = {
.name = "fdrive/media_rate",
.version_id = 1,
.minimum_version_id = 1,
.minimum_version_id_old = 1,
.fields = (VMStateField[]) {
VMSTATE_UINT8(media_rate, FDrive),
VMSTATE_END_OF_LIST()
}
};
static const VMStateDescription vmstate_fdrive = {
.name = "fdrive",
.version_id = 1,
.minimum_version_id = 1,
.minimum_version_id_old = 1,
.fields = (VMStateField[]) {
VMSTATE_UINT8(head, FDrive),
VMSTATE_UINT8(track, FDrive),
VMSTATE_UINT8(sect, FDrive),
VMSTATE_END_OF_LIST()
},
.subsections = (VMStateSubsection[]) {
{
.vmsd = &vmstate_fdrive_media_changed,
.needed = &fdrive_media_changed_needed,
} , {
.vmsd = &vmstate_fdrive_media_rate,
.needed = &fdrive_media_rate_needed,
} , {
/* empty */
}
}
};
static void fdc_pre_save(void *opaque)
{
FDCtrl *s = opaque;
s->dor_vmstate = s->dor | GET_CUR_DRV(s);
}
static int fdc_post_load(void *opaque, int version_id)
{
FDCtrl *s = opaque;
SET_CUR_DRV(s, s->dor_vmstate & FD_DOR_SELMASK);
s->dor = s->dor_vmstate & ~FD_DOR_SELMASK;
return 0;
}
static const VMStateDescription vmstate_fdc = {
.name = "fdc",
.version_id = 2,
.minimum_version_id = 2,
.minimum_version_id_old = 2,
.pre_save = fdc_pre_save,
.post_load = fdc_post_load,
.fields = (VMStateField []) {
/* Controller State */
VMSTATE_UINT8(sra, FDCtrl),
VMSTATE_UINT8(srb, FDCtrl),
VMSTATE_UINT8(dor_vmstate, FDCtrl),
VMSTATE_UINT8(tdr, FDCtrl),
VMSTATE_UINT8(dsr, FDCtrl),
VMSTATE_UINT8(msr, FDCtrl),
VMSTATE_UINT8(status0, FDCtrl),
VMSTATE_UINT8(status1, FDCtrl),
VMSTATE_UINT8(status2, FDCtrl),
/* Command FIFO */
VMSTATE_VARRAY_INT32(fifo, FDCtrl, fifo_size, 0, vmstate_info_uint8,
uint8_t),
VMSTATE_UINT32(data_pos, FDCtrl),
VMSTATE_UINT32(data_len, FDCtrl),
VMSTATE_UINT8(data_state, FDCtrl),
VMSTATE_UINT8(data_dir, FDCtrl),
VMSTATE_UINT8(eot, FDCtrl),
/* States kept only to be returned back */
VMSTATE_UINT8(timer0, FDCtrl),
VMSTATE_UINT8(timer1, FDCtrl),
VMSTATE_UINT8(precomp_trk, FDCtrl),
VMSTATE_UINT8(config, FDCtrl),
VMSTATE_UINT8(lock, FDCtrl),
VMSTATE_UINT8(pwrd, FDCtrl),
VMSTATE_UINT8_EQUAL(num_floppies, FDCtrl),
VMSTATE_STRUCT_ARRAY(drives, FDCtrl, MAX_FD, 1,
vmstate_fdrive, FDrive),
VMSTATE_END_OF_LIST()
}
};
static void fdctrl_external_reset_sysbus(DeviceState *d)
{
FDCtrlSysBus *sys = container_of(d, FDCtrlSysBus, busdev.qdev);
FDCtrl *s = &sys->state;
fdctrl_reset(s, 0);
}
static void fdctrl_external_reset_isa(DeviceState *d)
{
FDCtrlISABus *isa = container_of(d, FDCtrlISABus, busdev.qdev);
FDCtrl *s = &isa->state;
fdctrl_reset(s, 0);
}
static void fdctrl_handle_tc(void *opaque, int irq, int level)
{
//FDCtrl *s = opaque;
if (level) {
// XXX
FLOPPY_DPRINTF("TC pulsed\n");
}
}
/* Change IRQ state */
static void fdctrl_reset_irq(FDCtrl *fdctrl)
{
fdctrl->status0 = 0;
if (!(fdctrl->sra & FD_SRA_INTPEND))
return;
FLOPPY_DPRINTF("Reset interrupt\n");
qemu_set_irq(fdctrl->irq, 0);
fdctrl->sra &= ~FD_SRA_INTPEND;
}
static void fdctrl_raise_irq(FDCtrl *fdctrl)
{
/* Sparc mutation */
if (fdctrl->sun4m && (fdctrl->msr & FD_MSR_CMDBUSY)) {
/* XXX: not sure */
fdctrl->msr &= ~FD_MSR_CMDBUSY;
fdctrl->msr |= FD_MSR_RQM | FD_MSR_DIO;
return;
}
if (!(fdctrl->sra & FD_SRA_INTPEND)) {
qemu_set_irq(fdctrl->irq, 1);
fdctrl->sra |= FD_SRA_INTPEND;
}
fdctrl->reset_sensei = 0;
FLOPPY_DPRINTF("Set interrupt status to 0x%02x\n", fdctrl->status0);
}
/* Reset controller */
static void fdctrl_reset(FDCtrl *fdctrl, int do_irq)
{
int i;
FLOPPY_DPRINTF("reset controller\n");
fdctrl_reset_irq(fdctrl);
/* Initialise controller */
fdctrl->sra = 0;
fdctrl->srb = 0xc0;
if (!fdctrl->drives[1].bs)
fdctrl->sra |= FD_SRA_nDRV2;
fdctrl->cur_drv = 0;
fdctrl->dor = FD_DOR_nRESET;
fdctrl->dor |= (fdctrl->dma_chann != -1) ? FD_DOR_DMAEN : 0;
fdctrl->msr = FD_MSR_RQM;
/* FIFO state */
fdctrl->data_pos = 0;
fdctrl->data_len = 0;
fdctrl->data_state = 0;
fdctrl->data_dir = FD_DIR_WRITE;
for (i = 0; i < MAX_FD; i++)
fd_recalibrate(&fdctrl->drives[i]);
fdctrl_reset_fifo(fdctrl);
if (do_irq) {
fdctrl->status0 |= FD_SR0_RDYCHG;
fdctrl_raise_irq(fdctrl);
fdctrl->reset_sensei = FD_RESET_SENSEI_COUNT;
}
}
static inline FDrive *drv0(FDCtrl *fdctrl)
{
return &fdctrl->drives[(fdctrl->tdr & FD_TDR_BOOTSEL) >> 2];
}
static inline FDrive *drv1(FDCtrl *fdctrl)
{
if ((fdctrl->tdr & FD_TDR_BOOTSEL) < (1 << 2))
return &fdctrl->drives[1];
else
return &fdctrl->drives[0];
}
#if MAX_FD == 4
static inline FDrive *drv2(FDCtrl *fdctrl)
{
if ((fdctrl->tdr & FD_TDR_BOOTSEL) < (2 << 2))
return &fdctrl->drives[2];
else
return &fdctrl->drives[1];
}
static inline FDrive *drv3(FDCtrl *fdctrl)
{
if ((fdctrl->tdr & FD_TDR_BOOTSEL) < (3 << 2))
return &fdctrl->drives[3];
else
return &fdctrl->drives[2];
}
#endif
static FDrive *get_cur_drv(FDCtrl *fdctrl)
{
switch (fdctrl->cur_drv) {
case 0: return drv0(fdctrl);
case 1: return drv1(fdctrl);
#if MAX_FD == 4
case 2: return drv2(fdctrl);
case 3: return drv3(fdctrl);
#endif
default: return NULL;
}
}
/* Status A register : 0x00 (read-only) */
static uint32_t fdctrl_read_statusA(FDCtrl *fdctrl)
{
uint32_t retval = fdctrl->sra;
FLOPPY_DPRINTF("status register A: 0x%02x\n", retval);
return retval;
}
/* Status B register : 0x01 (read-only) */
static uint32_t fdctrl_read_statusB(FDCtrl *fdctrl)
{
uint32_t retval = fdctrl->srb;
FLOPPY_DPRINTF("status register B: 0x%02x\n", retval);
return retval;
}
/* Digital output register : 0x02 */
static uint32_t fdctrl_read_dor(FDCtrl *fdctrl)
{
uint32_t retval = fdctrl->dor;
/* Selected drive */
retval |= fdctrl->cur_drv;
FLOPPY_DPRINTF("digital output register: 0x%02x\n", retval);
return retval;
}
static void fdctrl_write_dor(FDCtrl *fdctrl, uint32_t value)
{
FLOPPY_DPRINTF("digital output register set to 0x%02x\n", value);
/* Motors */
if (value & FD_DOR_MOTEN0)
fdctrl->srb |= FD_SRB_MTR0;
else
fdctrl->srb &= ~FD_SRB_MTR0;
if (value & FD_DOR_MOTEN1)
fdctrl->srb |= FD_SRB_MTR1;
else
fdctrl->srb &= ~FD_SRB_MTR1;
/* Drive */
if (value & 1)
fdctrl->srb |= FD_SRB_DR0;
else
fdctrl->srb &= ~FD_SRB_DR0;
/* Reset */
if (!(value & FD_DOR_nRESET)) {
if (fdctrl->dor & FD_DOR_nRESET) {
FLOPPY_DPRINTF("controller enter RESET state\n");
}
} else {
if (!(fdctrl->dor & FD_DOR_nRESET)) {
FLOPPY_DPRINTF("controller out of RESET state\n");
fdctrl_reset(fdctrl, 1);
fdctrl->dsr &= ~FD_DSR_PWRDOWN;
}
}
/* Selected drive */
fdctrl->cur_drv = value & FD_DOR_SELMASK;
fdctrl->dor = value;
}
/* Tape drive register : 0x03 */
static uint32_t fdctrl_read_tape(FDCtrl *fdctrl)
{
uint32_t retval = fdctrl->tdr;
FLOPPY_DPRINTF("tape drive register: 0x%02x\n", retval);
return retval;
}
static void fdctrl_write_tape(FDCtrl *fdctrl, uint32_t value)
{
/* Reset mode */
if (!(fdctrl->dor & FD_DOR_nRESET)) {
FLOPPY_DPRINTF("Floppy controller in RESET state !\n");
return;
}
FLOPPY_DPRINTF("tape drive register set to 0x%02x\n", value);
/* Disk boot selection indicator */
fdctrl->tdr = value & FD_TDR_BOOTSEL;
/* Tape indicators: never allow */
}
/* Main status register : 0x04 (read) */
static uint32_t fdctrl_read_main_status(FDCtrl *fdctrl)
{
uint32_t retval = fdctrl->msr;
fdctrl->dsr &= ~FD_DSR_PWRDOWN;
fdctrl->dor |= FD_DOR_nRESET;
/* Sparc mutation */
if (fdctrl->sun4m) {
retval |= FD_MSR_DIO;
fdctrl_reset_irq(fdctrl);
};
FLOPPY_DPRINTF("main status register: 0x%02x\n", retval);
return retval;
}
/* Data select rate register : 0x04 (write) */
static void fdctrl_write_rate(FDCtrl *fdctrl, uint32_t value)
{
/* Reset mode */
if (!(fdctrl->dor & FD_DOR_nRESET)) {
FLOPPY_DPRINTF("Floppy controller in RESET state !\n");
return;
}
FLOPPY_DPRINTF("select rate register set to 0x%02x\n", value);
/* Reset: autoclear */
if (value & FD_DSR_SWRESET) {
fdctrl->dor &= ~FD_DOR_nRESET;
fdctrl_reset(fdctrl, 1);
fdctrl->dor |= FD_DOR_nRESET;
}
if (value & FD_DSR_PWRDOWN) {
fdctrl_reset(fdctrl, 1);
}
fdctrl->dsr = value;
}
/* Configuration control register: 0x07 (write) */
static void fdctrl_write_ccr(FDCtrl *fdctrl, uint32_t value)
{
/* Reset mode */
if (!(fdctrl->dor & FD_DOR_nRESET)) {
FLOPPY_DPRINTF("Floppy controller in RESET state !\n");
return;
}
FLOPPY_DPRINTF("configuration control register set to 0x%02x\n", value);
/* Only the rate selection bits used in AT mode, and we
* store those in the DSR.
*/
fdctrl->dsr = (fdctrl->dsr & ~FD_DSR_DRATEMASK) |
(value & FD_DSR_DRATEMASK);
}
static int fdctrl_media_changed(FDrive *drv)
{
return drv->media_changed;
}
/* Digital input register : 0x07 (read-only) */
static uint32_t fdctrl_read_dir(FDCtrl *fdctrl)
{
uint32_t retval = 0;
if (fdctrl_media_changed(get_cur_drv(fdctrl))) {
retval |= FD_DIR_DSKCHG;
}
if (retval != 0) {
FLOPPY_DPRINTF("Floppy digital input register: 0x%02x\n", retval);
}
return retval;
}
/* FIFO state control */
static void fdctrl_reset_fifo(FDCtrl *fdctrl)
{
fdctrl->data_dir = FD_DIR_WRITE;
fdctrl->data_pos = 0;
fdctrl->msr &= ~(FD_MSR_CMDBUSY | FD_MSR_DIO);
}
/* Set FIFO status for the host to read */
static void fdctrl_set_fifo(FDCtrl *fdctrl, int fifo_len)
{
fdctrl->data_dir = FD_DIR_READ;
fdctrl->data_len = fifo_len;
fdctrl->data_pos = 0;
fdctrl->msr |= FD_MSR_CMDBUSY | FD_MSR_RQM | FD_MSR_DIO;
}
/* Set an error: unimplemented/unknown command */
static void fdctrl_unimplemented(FDCtrl *fdctrl, int direction)
{
qemu_log_mask(LOG_UNIMP, "fdc: unimplemented command 0x%02x\n",
fdctrl->fifo[0]);
fdctrl->fifo[0] = FD_SR0_INVCMD;
fdctrl_set_fifo(fdctrl, 1);
}
/* Seek to next sector
* returns 0 when end of track reached (for DBL_SIDES on head 1)
* otherwise returns 1
*/
static int fdctrl_seek_to_next_sect(FDCtrl *fdctrl, FDrive *cur_drv)
{
FLOPPY_DPRINTF("seek to next sector (%d %02x %02x => %d)\n",
cur_drv->head, cur_drv->track, cur_drv->sect,
fd_sector(cur_drv));
/* XXX: cur_drv->sect >= cur_drv->last_sect should be an
error in fact */
uint8_t new_head = cur_drv->head;
uint8_t new_track = cur_drv->track;
uint8_t new_sect = cur_drv->sect;
int ret = 1;
if (new_sect >= cur_drv->last_sect ||
new_sect == fdctrl->eot) {
new_sect = 1;
if (FD_MULTI_TRACK(fdctrl->data_state)) {
if (new_head == 0 &&
(cur_drv->flags & FDISK_DBL_SIDES) != 0) {
new_head = 1;
} else {
new_head = 0;
new_track++;
if ((cur_drv->flags & FDISK_DBL_SIDES) == 0) {
ret = 0;
}
}
} else {
new_track++;
ret = 0;
}
if (ret == 1) {
FLOPPY_DPRINTF("seek to next track (%d %02x %02x => %d)\n",
new_head, new_track, new_sect, fd_sector(cur_drv));
}
} else {
new_sect++;
}
fd_seek(cur_drv, new_head, new_track, new_sect, 1);
return ret;
}
/* Callback for transfer end (stop or abort) */
static void fdctrl_stop_transfer(FDCtrl *fdctrl, uint8_t status0,
uint8_t status1, uint8_t status2)
{
FDrive *cur_drv;
cur_drv = get_cur_drv(fdctrl);
fdctrl->status0 = status0 | FD_SR0_SEEK | (cur_drv->head << 2) |
GET_CUR_DRV(fdctrl);
FLOPPY_DPRINTF("transfer status: %02x %02x %02x (%02x)\n",
status0, status1, status2, fdctrl->status0);
fdctrl->fifo[0] = fdctrl->status0;
fdctrl->fifo[1] = status1;
fdctrl->fifo[2] = status2;
fdctrl->fifo[3] = cur_drv->track;
fdctrl->fifo[4] = cur_drv->head;
fdctrl->fifo[5] = cur_drv->sect;
fdctrl->fifo[6] = FD_SECTOR_SC;
fdctrl->data_dir = FD_DIR_READ;
if (!(fdctrl->msr & FD_MSR_NONDMA)) {
DMA_release_DREQ(fdctrl->dma_chann);
}
fdctrl->msr |= FD_MSR_RQM | FD_MSR_DIO;
fdctrl->msr &= ~FD_MSR_NONDMA;
fdctrl_set_fifo(fdctrl, 7);
fdctrl_raise_irq(fdctrl);
}
/* Prepare a data transfer (either DMA or FIFO) */
static void fdctrl_start_transfer(FDCtrl *fdctrl, int direction)
{
FDrive *cur_drv;
uint8_t kh, kt, ks;
int did_seek = 0;
SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK);
cur_drv = get_cur_drv(fdctrl);
kt = fdctrl->fifo[2];
kh = fdctrl->fifo[3];
ks = fdctrl->fifo[4];
FLOPPY_DPRINTF("Start transfer at %d %d %02x %02x (%d)\n",
GET_CUR_DRV(fdctrl), kh, kt, ks,
fd_sector_calc(kh, kt, ks, cur_drv->last_sect,
NUM_SIDES(cur_drv)));
switch (fd_seek(cur_drv, kh, kt, ks, fdctrl->config & FD_CONFIG_EIS)) {
case 2:
/* sect too big */
fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, 0x00, 0x00);
fdctrl->fifo[3] = kt;
fdctrl->fifo[4] = kh;
fdctrl->fifo[5] = ks;
return;
case 3:
/* track too big */
fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, FD_SR1_EC, 0x00);
fdctrl->fifo[3] = kt;
fdctrl->fifo[4] = kh;
fdctrl->fifo[5] = ks;
return;
case 4:
/* No seek enabled */
fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, 0x00, 0x00);
fdctrl->fifo[3] = kt;
fdctrl->fifo[4] = kh;
fdctrl->fifo[5] = ks;
return;
case 1:
did_seek = 1;
break;
default:
break;
}
/* Check the data rate. If the programmed data rate does not match
* the currently inserted medium, the operation has to fail. */
if (fdctrl->check_media_rate &&
(fdctrl->dsr & FD_DSR_DRATEMASK) != cur_drv->media_rate) {
FLOPPY_DPRINTF("data rate mismatch (fdc=%d, media=%d)\n",
fdctrl->dsr & FD_DSR_DRATEMASK, cur_drv->media_rate);
fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, FD_SR1_MA, 0x00);
fdctrl->fifo[3] = kt;
fdctrl->fifo[4] = kh;
fdctrl->fifo[5] = ks;
return;
}
/* Set the FIFO state */
fdctrl->data_dir = direction;
fdctrl->data_pos = 0;
fdctrl->msr |= FD_MSR_CMDBUSY;
if (fdctrl->fifo[0] & 0x80)
fdctrl->data_state |= FD_STATE_MULTI;
else
fdctrl->data_state &= ~FD_STATE_MULTI;
if (did_seek)
fdctrl->data_state |= FD_STATE_SEEK;
else
fdctrl->data_state &= ~FD_STATE_SEEK;
if (fdctrl->fifo[5] == 00) {
fdctrl->data_len = fdctrl->fifo[8];
} else {
int tmp;
fdctrl->data_len = 128 << (fdctrl->fifo[5] > 7 ? 7 : fdctrl->fifo[5]);
tmp = (fdctrl->fifo[6] - ks + 1);
if (fdctrl->fifo[0] & 0x80)
tmp += fdctrl->fifo[6];
fdctrl->data_len *= tmp;
}
fdctrl->eot = fdctrl->fifo[6];
if (fdctrl->dor & FD_DOR_DMAEN) {
int dma_mode;
/* DMA transfer are enabled. Check if DMA channel is well programmed */
dma_mode = DMA_get_channel_mode(fdctrl->dma_chann);
dma_mode = (dma_mode >> 2) & 3;
FLOPPY_DPRINTF("dma_mode=%d direction=%d (%d - %d)\n",
dma_mode, direction,
(128 << fdctrl->fifo[5]) *
(cur_drv->last_sect - ks + 1), fdctrl->data_len);
if (((direction == FD_DIR_SCANE || direction == FD_DIR_SCANL ||
direction == FD_DIR_SCANH) && dma_mode == 0) ||
(direction == FD_DIR_WRITE && dma_mode == 2) ||
(direction == FD_DIR_READ && dma_mode == 1)) {
/* No access is allowed until DMA transfer has completed */
fdctrl->msr &= ~FD_MSR_RQM;
/* Now, we just have to wait for the DMA controller to
* recall us...
*/
DMA_hold_DREQ(fdctrl->dma_chann);
DMA_schedule(fdctrl->dma_chann);
return;
} else {
FLOPPY_DPRINTF("bad dma_mode=%d direction=%d\n", dma_mode,
direction);
}
}
FLOPPY_DPRINTF("start non-DMA transfer\n");
fdctrl->msr |= FD_MSR_NONDMA;
if (direction != FD_DIR_WRITE)
fdctrl->msr |= FD_MSR_DIO;
/* IO based transfer: calculate len */
fdctrl->status0 |= FD_SR0_SEEK;
fdctrl_raise_irq(fdctrl);
}
/* Prepare a transfer of deleted data */
static void fdctrl_start_transfer_del(FDCtrl *fdctrl, int direction)
{
qemu_log_mask(LOG_UNIMP, "fdctrl_start_transfer_del() unimplemented\n");
/* We don't handle deleted data,
* so we don't return *ANYTHING*
*/
fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM | FD_SR0_SEEK, 0x00, 0x00);
}
/* handlers for DMA transfers */
static int fdctrl_transfer_handler (void *opaque, int nchan,
int dma_pos, int dma_len)
{
FDCtrl *fdctrl;
FDrive *cur_drv;
int len, start_pos, rel_pos;
uint8_t status0 = 0x00, status1 = 0x00, status2 = 0x00;
fdctrl = opaque;
if (fdctrl->msr & FD_MSR_RQM) {
FLOPPY_DPRINTF("Not in DMA transfer mode !\n");
return 0;
}
cur_drv = get_cur_drv(fdctrl);
if (fdctrl->data_dir == FD_DIR_SCANE || fdctrl->data_dir == FD_DIR_SCANL ||
fdctrl->data_dir == FD_DIR_SCANH)
status2 = FD_SR2_SNS;
if (dma_len > fdctrl->data_len)
dma_len = fdctrl->data_len;
if (cur_drv->bs == NULL) {
if (fdctrl->data_dir == FD_DIR_WRITE)
fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM | FD_SR0_SEEK, 0x00, 0x00);
else
fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, 0x00, 0x00);
len = 0;
goto transfer_error;
}
rel_pos = fdctrl->data_pos % FD_SECTOR_LEN;
for (start_pos = fdctrl->data_pos; fdctrl->data_pos < dma_len;) {
len = dma_len - fdctrl->data_pos;
if (len + rel_pos > FD_SECTOR_LEN)
len = FD_SECTOR_LEN - rel_pos;
FLOPPY_DPRINTF("copy %d bytes (%d %d %d) %d pos %d %02x "
"(%d-0x%08x 0x%08x)\n", len, dma_len, fdctrl->data_pos,
fdctrl->data_len, GET_CUR_DRV(fdctrl), cur_drv->head,
cur_drv->track, cur_drv->sect, fd_sector(cur_drv),
fd_sector(cur_drv) * FD_SECTOR_LEN);
if (fdctrl->data_dir != FD_DIR_WRITE ||
len < FD_SECTOR_LEN || rel_pos != 0) {
/* READ & SCAN commands and realign to a sector for WRITE */
if (bdrv_read(cur_drv->bs, fd_sector(cur_drv),
fdctrl->fifo, 1) < 0) {
FLOPPY_DPRINTF("Floppy: error getting sector %d\n",
fd_sector(cur_drv));
/* Sure, image size is too small... */
memset(fdctrl->fifo, 0, FD_SECTOR_LEN);
}
}
switch (fdctrl->data_dir) {
case FD_DIR_READ:
/* READ commands */
DMA_write_memory (nchan, fdctrl->fifo + rel_pos,
fdctrl->data_pos, len);
break;
case FD_DIR_WRITE:
/* WRITE commands */
if (cur_drv->ro) {
/* Handle readonly medium early, no need to do DMA, touch the
* LED or attempt any writes. A real floppy doesn't attempt
* to write to readonly media either. */
fdctrl_stop_transfer(fdctrl,
FD_SR0_ABNTERM | FD_SR0_SEEK, FD_SR1_NW,
0x00);
goto transfer_error;
}
DMA_read_memory (nchan, fdctrl->fifo + rel_pos,
fdctrl->data_pos, len);
if (bdrv_write(cur_drv->bs, fd_sector(cur_drv),
fdctrl->fifo, 1) < 0) {
FLOPPY_DPRINTF("error writing sector %d\n",
fd_sector(cur_drv));
fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM | FD_SR0_SEEK, 0x00, 0x00);
goto transfer_error;
}
break;
default:
/* SCAN commands */
{
uint8_t tmpbuf[FD_SECTOR_LEN];
int ret;
DMA_read_memory (nchan, tmpbuf, fdctrl->data_pos, len);
ret = memcmp(tmpbuf, fdctrl->fifo + rel_pos, len);
if (ret == 0) {
status2 = FD_SR2_SEH;
goto end_transfer;
}
if ((ret < 0 && fdctrl->data_dir == FD_DIR_SCANL) ||
(ret > 0 && fdctrl->data_dir == FD_DIR_SCANH)) {
status2 = 0x00;
goto end_transfer;
}
}
break;
}
fdctrl->data_pos += len;
rel_pos = fdctrl->data_pos % FD_SECTOR_LEN;
if (rel_pos == 0) {
/* Seek to next sector */
if (!fdctrl_seek_to_next_sect(fdctrl, cur_drv))
break;
}
}
end_transfer:
len = fdctrl->data_pos - start_pos;
FLOPPY_DPRINTF("end transfer %d %d %d\n",
fdctrl->data_pos, len, fdctrl->data_len);
if (fdctrl->data_dir == FD_DIR_SCANE ||
fdctrl->data_dir == FD_DIR_SCANL ||
fdctrl->data_dir == FD_DIR_SCANH)
status2 = FD_SR2_SEH;
if (FD_DID_SEEK(fdctrl->data_state))
status0 |= FD_SR0_SEEK;
fdctrl->data_len -= len;
fdctrl_stop_transfer(fdctrl, status0, status1, status2);
transfer_error:
return len;
}
/* Data register : 0x05 */
static uint32_t fdctrl_read_data(FDCtrl *fdctrl)
{
FDrive *cur_drv;
uint32_t retval = 0;
int pos;
cur_drv = get_cur_drv(fdctrl);
fdctrl->dsr &= ~FD_DSR_PWRDOWN;
if (!(fdctrl->msr & FD_MSR_RQM) || !(fdctrl->msr & FD_MSR_DIO)) {
FLOPPY_DPRINTF("error: controller not ready for reading\n");
return 0;
}
pos = fdctrl->data_pos;
if (fdctrl->msr & FD_MSR_NONDMA) {
pos %= FD_SECTOR_LEN;
if (pos == 0) {
if (fdctrl->data_pos != 0)
if (!fdctrl_seek_to_next_sect(fdctrl, cur_drv)) {
FLOPPY_DPRINTF("error seeking to next sector %d\n",
fd_sector(cur_drv));
return 0;
}
if (bdrv_read(cur_drv->bs, fd_sector(cur_drv), fdctrl->fifo, 1) < 0) {
FLOPPY_DPRINTF("error getting sector %d\n",
fd_sector(cur_drv));
/* Sure, image size is too small... */
memset(fdctrl->fifo, 0, FD_SECTOR_LEN);
}
}
}
retval = fdctrl->fifo[pos];
if (++fdctrl->data_pos == fdctrl->data_len) {
fdctrl->data_pos = 0;
/* Switch from transfer mode to status mode
* then from status mode to command mode
*/
if (fdctrl->msr & FD_MSR_NONDMA) {
fdctrl_stop_transfer(fdctrl, FD_SR0_SEEK, 0x00, 0x00);
} else {
fdctrl_reset_fifo(fdctrl);
fdctrl_reset_irq(fdctrl);
}
}
FLOPPY_DPRINTF("data register: 0x%02x\n", retval);
return retval;
}
static void fdctrl_format_sector(FDCtrl *fdctrl)
{
FDrive *cur_drv;
uint8_t kh, kt, ks;
SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK);
cur_drv = get_cur_drv(fdctrl);
kt = fdctrl->fifo[6];
kh = fdctrl->fifo[7];
ks = fdctrl->fifo[8];
FLOPPY_DPRINTF("format sector at %d %d %02x %02x (%d)\n",
GET_CUR_DRV(fdctrl), kh, kt, ks,
fd_sector_calc(kh, kt, ks, cur_drv->last_sect,
NUM_SIDES(cur_drv)));
switch (fd_seek(cur_drv, kh, kt, ks, fdctrl->config & FD_CONFIG_EIS)) {
case 2:
/* sect too big */
fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, 0x00, 0x00);
fdctrl->fifo[3] = kt;
fdctrl->fifo[4] = kh;
fdctrl->fifo[5] = ks;
return;
case 3:
/* track too big */
fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, FD_SR1_EC, 0x00);
fdctrl->fifo[3] = kt;
fdctrl->fifo[4] = kh;
fdctrl->fifo[5] = ks;
return;
case 4:
/* No seek enabled */
fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, 0x00, 0x00);
fdctrl->fifo[3] = kt;
fdctrl->fifo[4] = kh;
fdctrl->fifo[5] = ks;
return;
case 1:
fdctrl->data_state |= FD_STATE_SEEK;
break;
default:
break;
}
memset(fdctrl->fifo, 0, FD_SECTOR_LEN);
if (cur_drv->bs == NULL ||
bdrv_write(cur_drv->bs, fd_sector(cur_drv), fdctrl->fifo, 1) < 0) {
FLOPPY_DPRINTF("error formatting sector %d\n", fd_sector(cur_drv));
fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM | FD_SR0_SEEK, 0x00, 0x00);
} else {
if (cur_drv->sect == cur_drv->last_sect) {
fdctrl->data_state &= ~FD_STATE_FORMAT;
/* Last sector done */
if (FD_DID_SEEK(fdctrl->data_state))
fdctrl_stop_transfer(fdctrl, FD_SR0_SEEK, 0x00, 0x00);
else
fdctrl_stop_transfer(fdctrl, 0x00, 0x00, 0x00);
} else {
/* More to do */
fdctrl->data_pos = 0;
fdctrl->data_len = 4;
}
}
}
static void fdctrl_handle_lock(FDCtrl *fdctrl, int direction)
{
fdctrl->lock = (fdctrl->fifo[0] & 0x80) ? 1 : 0;
fdctrl->fifo[0] = fdctrl->lock << 4;
fdctrl_set_fifo(fdctrl, 1);
}
static void fdctrl_handle_dumpreg(FDCtrl *fdctrl, int direction)
{
FDrive *cur_drv = get_cur_drv(fdctrl);
/* Drives position */
fdctrl->fifo[0] = drv0(fdctrl)->track;
fdctrl->fifo[1] = drv1(fdctrl)->track;
#if MAX_FD == 4
fdctrl->fifo[2] = drv2(fdctrl)->track;
fdctrl->fifo[3] = drv3(fdctrl)->track;
#else
fdctrl->fifo[2] = 0;
fdctrl->fifo[3] = 0;
#endif
/* timers */
fdctrl->fifo[4] = fdctrl->timer0;
fdctrl->fifo[5] = (fdctrl->timer1 << 1) | (fdctrl->dor & FD_DOR_DMAEN ? 1 : 0);
fdctrl->fifo[6] = cur_drv->last_sect;
fdctrl->fifo[7] = (fdctrl->lock << 7) |
(cur_drv->perpendicular << 2);
fdctrl->fifo[8] = fdctrl->config;
fdctrl->fifo[9] = fdctrl->precomp_trk;
fdctrl_set_fifo(fdctrl, 10);
}
static void fdctrl_handle_version(FDCtrl *fdctrl, int direction)
{
/* Controller's version */
fdctrl->fifo[0] = fdctrl->version;
fdctrl_set_fifo(fdctrl, 1);
}
static void fdctrl_handle_partid(FDCtrl *fdctrl, int direction)
{
fdctrl->fifo[0] = 0x41; /* Stepping 1 */
fdctrl_set_fifo(fdctrl, 1);
}
static void fdctrl_handle_restore(FDCtrl *fdctrl, int direction)
{
FDrive *cur_drv = get_cur_drv(fdctrl);
/* Drives position */
drv0(fdctrl)->track = fdctrl->fifo[3];
drv1(fdctrl)->track = fdctrl->fifo[4];
#if MAX_FD == 4
drv2(fdctrl)->track = fdctrl->fifo[5];
drv3(fdctrl)->track = fdctrl->fifo[6];
#endif
/* timers */
fdctrl->timer0 = fdctrl->fifo[7];
fdctrl->timer1 = fdctrl->fifo[8];
cur_drv->last_sect = fdctrl->fifo[9];
fdctrl->lock = fdctrl->fifo[10] >> 7;
cur_drv->perpendicular = (fdctrl->fifo[10] >> 2) & 0xF;
fdctrl->config = fdctrl->fifo[11];
fdctrl->precomp_trk = fdctrl->fifo[12];
fdctrl->pwrd = fdctrl->fifo[13];
fdctrl_reset_fifo(fdctrl);
}
static void fdctrl_handle_save(FDCtrl *fdctrl, int direction)
{
FDrive *cur_drv = get_cur_drv(fdctrl);
fdctrl->fifo[0] = 0;
fdctrl->fifo[1] = 0;
/* Drives position */
fdctrl->fifo[2] = drv0(fdctrl)->track;
fdctrl->fifo[3] = drv1(fdctrl)->track;
#if MAX_FD == 4
fdctrl->fifo[4] = drv2(fdctrl)->track;
fdctrl->fifo[5] = drv3(fdctrl)->track;
#else
fdctrl->fifo[4] = 0;
fdctrl->fifo[5] = 0;
#endif
/* timers */
fdctrl->fifo[6] = fdctrl->timer0;
fdctrl->fifo[7] = fdctrl->timer1;
fdctrl->fifo[8] = cur_drv->last_sect;
fdctrl->fifo[9] = (fdctrl->lock << 7) |
(cur_drv->perpendicular << 2);
fdctrl->fifo[10] = fdctrl->config;
fdctrl->fifo[11] = fdctrl->precomp_trk;
fdctrl->fifo[12] = fdctrl->pwrd;
fdctrl->fifo[13] = 0;
fdctrl->fifo[14] = 0;
fdctrl_set_fifo(fdctrl, 15);
}
static void fdctrl_handle_readid(FDCtrl *fdctrl, int direction)
{
FDrive *cur_drv = get_cur_drv(fdctrl);
cur_drv->head = (fdctrl->fifo[1] >> 2) & 1;
qemu_mod_timer(fdctrl->result_timer,
qemu_get_clock_ns(vm_clock) + (get_ticks_per_sec() / 50));
}
static void fdctrl_handle_format_track(FDCtrl *fdctrl, int direction)
{
FDrive *cur_drv;
SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK);
cur_drv = get_cur_drv(fdctrl);
fdctrl->data_state |= FD_STATE_FORMAT;
if (fdctrl->fifo[0] & 0x80)
fdctrl->data_state |= FD_STATE_MULTI;
else
fdctrl->data_state &= ~FD_STATE_MULTI;
fdctrl->data_state &= ~FD_STATE_SEEK;
cur_drv->bps =
fdctrl->fifo[2] > 7 ? 16384 : 128 << fdctrl->fifo[2];
#if 0
cur_drv->last_sect =
cur_drv->flags & FDISK_DBL_SIDES ? fdctrl->fifo[3] :
fdctrl->fifo[3] / 2;
#else
cur_drv->last_sect = fdctrl->fifo[3];
#endif
/* TODO: implement format using DMA expected by the Bochs BIOS
* and Linux fdformat (read 3 bytes per sector via DMA and fill
* the sector with the specified fill byte
*/
fdctrl->data_state &= ~FD_STATE_FORMAT;
fdctrl_stop_transfer(fdctrl, 0x00, 0x00, 0x00);
}
static void fdctrl_handle_specify(FDCtrl *fdctrl, int direction)
{
fdctrl->timer0 = (fdctrl->fifo[1] >> 4) & 0xF;
fdctrl->timer1 = fdctrl->fifo[2] >> 1;
if (fdctrl->fifo[2] & 1)
fdctrl->dor &= ~FD_DOR_DMAEN;
else
fdctrl->dor |= FD_DOR_DMAEN;
/* No result back */
fdctrl_reset_fifo(fdctrl);
}
static void fdctrl_handle_sense_drive_status(FDCtrl *fdctrl, int direction)
{
FDrive *cur_drv;
SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK);
cur_drv = get_cur_drv(fdctrl);
cur_drv->head = (fdctrl->fifo[1] >> 2) & 1;
/* 1 Byte status back */
fdctrl->fifo[0] = (cur_drv->ro << 6) |
(cur_drv->track == 0 ? 0x10 : 0x00) |
(cur_drv->head << 2) |
GET_CUR_DRV(fdctrl) |
0x28;
fdctrl_set_fifo(fdctrl, 1);
}
static void fdctrl_handle_recalibrate(FDCtrl *fdctrl, int direction)
{
FDrive *cur_drv;
SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK);
cur_drv = get_cur_drv(fdctrl);
fd_recalibrate(cur_drv);
fdctrl_reset_fifo(fdctrl);
/* Raise Interrupt */
fdctrl->status0 |= FD_SR0_SEEK;
fdctrl_raise_irq(fdctrl);
}
static void fdctrl_handle_sense_interrupt_status(FDCtrl *fdctrl, int direction)
{
FDrive *cur_drv = get_cur_drv(fdctrl);
if (fdctrl->reset_sensei > 0) {
fdctrl->fifo[0] =
FD_SR0_RDYCHG + FD_RESET_SENSEI_COUNT - fdctrl->reset_sensei;
fdctrl->reset_sensei--;
} else if (!(fdctrl->sra & FD_SRA_INTPEND)) {
fdctrl->fifo[0] = FD_SR0_INVCMD;
fdctrl_set_fifo(fdctrl, 1);
return;
} else {
fdctrl->fifo[0] =
(fdctrl->status0 & ~(FD_SR0_HEAD | FD_SR0_DS1 | FD_SR0_DS0))
| GET_CUR_DRV(fdctrl);
}
fdctrl->fifo[1] = cur_drv->track;
fdctrl_set_fifo(fdctrl, 2);
fdctrl_reset_irq(fdctrl);
fdctrl->status0 = FD_SR0_RDYCHG;
}
static void fdctrl_handle_seek(FDCtrl *fdctrl, int direction)
{
FDrive *cur_drv;
SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK);
cur_drv = get_cur_drv(fdctrl);
fdctrl_reset_fifo(fdctrl);
/* The seek command just sends step pulses to the drive and doesn't care if
* there is a medium inserted of if it's banging the head against the drive.
*/
fd_seek(cur_drv, cur_drv->head, fdctrl->fifo[2], cur_drv->sect, 1);
/* Raise Interrupt */
fdctrl->status0 |= FD_SR0_SEEK;
fdctrl_raise_irq(fdctrl);
}
static void fdctrl_handle_perpendicular_mode(FDCtrl *fdctrl, int direction)
{
FDrive *cur_drv = get_cur_drv(fdctrl);
if (fdctrl->fifo[1] & 0x80)
cur_drv->perpendicular = fdctrl->fifo[1] & 0x7;
/* No result back */
fdctrl_reset_fifo(fdctrl);
}
static void fdctrl_handle_configure(FDCtrl *fdctrl, int direction)
{
fdctrl->config = fdctrl->fifo[2];
fdctrl->precomp_trk = fdctrl->fifo[3];
/* No result back */
fdctrl_reset_fifo(fdctrl);
}
static void fdctrl_handle_powerdown_mode(FDCtrl *fdctrl, int direction)
{
fdctrl->pwrd = fdctrl->fifo[1];
fdctrl->fifo[0] = fdctrl->fifo[1];
fdctrl_set_fifo(fdctrl, 1);
}
static void fdctrl_handle_option(FDCtrl *fdctrl, int direction)
{
/* No result back */
fdctrl_reset_fifo(fdctrl);
}
static void fdctrl_handle_drive_specification_command(FDCtrl *fdctrl, int direction)
{
FDrive *cur_drv = get_cur_drv(fdctrl);
if (fdctrl->fifo[fdctrl->data_pos - 1] & 0x80) {
/* Command parameters done */
if (fdctrl->fifo[fdctrl->data_pos - 1] & 0x40) {
fdctrl->fifo[0] = fdctrl->fifo[1];
fdctrl->fifo[2] = 0;
fdctrl->fifo[3] = 0;
fdctrl_set_fifo(fdctrl, 4);
} else {
fdctrl_reset_fifo(fdctrl);
}
} else if (fdctrl->data_len > 7) {
/* ERROR */
fdctrl->fifo[0] = 0x80 |
(cur_drv->head << 2) | GET_CUR_DRV(fdctrl);
fdctrl_set_fifo(fdctrl, 1);
}
}
static void fdctrl_handle_relative_seek_in(FDCtrl *fdctrl, int direction)
{
FDrive *cur_drv;
SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK);
cur_drv = get_cur_drv(fdctrl);
if (fdctrl->fifo[2] + cur_drv->track >= cur_drv->max_track) {
fd_seek(cur_drv, cur_drv->head, cur_drv->max_track - 1,
cur_drv->sect, 1);
} else {
fd_seek(cur_drv, cur_drv->head,
cur_drv->track + fdctrl->fifo[2], cur_drv->sect, 1);
}
fdctrl_reset_fifo(fdctrl);
/* Raise Interrupt */
fdctrl->status0 |= FD_SR0_SEEK;
fdctrl_raise_irq(fdctrl);
}
static void fdctrl_handle_relative_seek_out(FDCtrl *fdctrl, int direction)
{
FDrive *cur_drv;
SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK);
cur_drv = get_cur_drv(fdctrl);
if (fdctrl->fifo[2] > cur_drv->track) {
fd_seek(cur_drv, cur_drv->head, 0, cur_drv->sect, 1);
} else {
fd_seek(cur_drv, cur_drv->head,
cur_drv->track - fdctrl->fifo[2], cur_drv->sect, 1);
}
fdctrl_reset_fifo(fdctrl);
/* Raise Interrupt */
fdctrl->status0 |= FD_SR0_SEEK;
fdctrl_raise_irq(fdctrl);
}
static const struct {
uint8_t value;
uint8_t mask;
const char* name;
int parameters;
void (*handler)(FDCtrl *fdctrl, int direction);
int direction;
} handlers[] = {
{ FD_CMD_READ, 0x1f, "READ", 8, fdctrl_start_transfer, FD_DIR_READ },
{ FD_CMD_WRITE, 0x3f, "WRITE", 8, fdctrl_start_transfer, FD_DIR_WRITE },
{ FD_CMD_SEEK, 0xff, "SEEK", 2, fdctrl_handle_seek },
{ FD_CMD_SENSE_INTERRUPT_STATUS, 0xff, "SENSE INTERRUPT STATUS", 0, fdctrl_handle_sense_interrupt_status },
{ FD_CMD_RECALIBRATE, 0xff, "RECALIBRATE", 1, fdctrl_handle_recalibrate },
{ FD_CMD_FORMAT_TRACK, 0xbf, "FORMAT TRACK", 5, fdctrl_handle_format_track },
{ FD_CMD_READ_TRACK, 0xbf, "READ TRACK", 8, fdctrl_start_transfer, FD_DIR_READ },
{ FD_CMD_RESTORE, 0xff, "RESTORE", 17, fdctrl_handle_restore }, /* part of READ DELETED DATA */
{ FD_CMD_SAVE, 0xff, "SAVE", 0, fdctrl_handle_save }, /* part of READ DELETED DATA */
{ FD_CMD_READ_DELETED, 0x1f, "READ DELETED DATA", 8, fdctrl_start_transfer_del, FD_DIR_READ },
{ FD_CMD_SCAN_EQUAL, 0x1f, "SCAN EQUAL", 8, fdctrl_start_transfer, FD_DIR_SCANE },
{ FD_CMD_VERIFY, 0x1f, "VERIFY", 8, fdctrl_unimplemented },
{ FD_CMD_SCAN_LOW_OR_EQUAL, 0x1f, "SCAN LOW OR EQUAL", 8, fdctrl_start_transfer, FD_DIR_SCANL },
{ FD_CMD_SCAN_HIGH_OR_EQUAL, 0x1f, "SCAN HIGH OR EQUAL", 8, fdctrl_start_transfer, FD_DIR_SCANH },
{ FD_CMD_WRITE_DELETED, 0x3f, "WRITE DELETED DATA", 8, fdctrl_start_transfer_del, FD_DIR_WRITE },
{ FD_CMD_READ_ID, 0xbf, "READ ID", 1, fdctrl_handle_readid },
{ FD_CMD_SPECIFY, 0xff, "SPECIFY", 2, fdctrl_handle_specify },
{ FD_CMD_SENSE_DRIVE_STATUS, 0xff, "SENSE DRIVE STATUS", 1, fdctrl_handle_sense_drive_status },
{ FD_CMD_PERPENDICULAR_MODE, 0xff, "PERPENDICULAR MODE", 1, fdctrl_handle_perpendicular_mode },
{ FD_CMD_CONFIGURE, 0xff, "CONFIGURE", 3, fdctrl_handle_configure },
{ FD_CMD_POWERDOWN_MODE, 0xff, "POWERDOWN MODE", 2, fdctrl_handle_powerdown_mode },
{ FD_CMD_OPTION, 0xff, "OPTION", 1, fdctrl_handle_option },
{ FD_CMD_DRIVE_SPECIFICATION_COMMAND, 0xff, "DRIVE SPECIFICATION COMMAND", 5, fdctrl_handle_drive_specification_command },
{ FD_CMD_RELATIVE_SEEK_OUT, 0xff, "RELATIVE SEEK OUT", 2, fdctrl_handle_relative_seek_out },
{ FD_CMD_FORMAT_AND_WRITE, 0xff, "FORMAT AND WRITE", 10, fdctrl_unimplemented },
{ FD_CMD_RELATIVE_SEEK_IN, 0xff, "RELATIVE SEEK IN", 2, fdctrl_handle_relative_seek_in },
{ FD_CMD_LOCK, 0x7f, "LOCK", 0, fdctrl_handle_lock },
{ FD_CMD_DUMPREG, 0xff, "DUMPREG", 0, fdctrl_handle_dumpreg },
{ FD_CMD_VERSION, 0xff, "VERSION", 0, fdctrl_handle_version },
{ FD_CMD_PART_ID, 0xff, "PART ID", 0, fdctrl_handle_partid },
{ FD_CMD_WRITE, 0x1f, "WRITE (BeOS)", 8, fdctrl_start_transfer, FD_DIR_WRITE }, /* not in specification ; BeOS 4.5 bug */
{ 0, 0, "unknown", 0, fdctrl_unimplemented }, /* default handler */
};
/* Associate command to an index in the 'handlers' array */
static uint8_t command_to_handler[256];
static void fdctrl_write_data(FDCtrl *fdctrl, uint32_t value)
{
FDrive *cur_drv;
int pos;
/* Reset mode */
if (!(fdctrl->dor & FD_DOR_nRESET)) {
FLOPPY_DPRINTF("Floppy controller in RESET state !\n");
return;
}
if (!(fdctrl->msr & FD_MSR_RQM) || (fdctrl->msr & FD_MSR_DIO)) {
FLOPPY_DPRINTF("error: controller not ready for writing\n");
return;
}
fdctrl->dsr &= ~FD_DSR_PWRDOWN;
/* Is it write command time ? */
if (fdctrl->msr & FD_MSR_NONDMA) {
/* FIFO data write */
pos = fdctrl->data_pos++;
pos %= FD_SECTOR_LEN;
fdctrl->fifo[pos] = value;
if (pos == FD_SECTOR_LEN - 1 ||
fdctrl->data_pos == fdctrl->data_len) {
cur_drv = get_cur_drv(fdctrl);
if (bdrv_write(cur_drv->bs, fd_sector(cur_drv), fdctrl->fifo, 1) < 0) {
FLOPPY_DPRINTF("error writing sector %d\n",
fd_sector(cur_drv));
return;
}
if (!fdctrl_seek_to_next_sect(fdctrl, cur_drv)) {
FLOPPY_DPRINTF("error seeking to next sector %d\n",
fd_sector(cur_drv));
return;
}
}
/* Switch from transfer mode to status mode
* then from status mode to command mode
*/
if (fdctrl->data_pos == fdctrl->data_len)
fdctrl_stop_transfer(fdctrl, FD_SR0_SEEK, 0x00, 0x00);
return;
}
if (fdctrl->data_pos == 0) {
/* Command */
pos = command_to_handler[value & 0xff];
FLOPPY_DPRINTF("%s command\n", handlers[pos].name);
fdctrl->data_len = handlers[pos].parameters + 1;
fdctrl->msr |= FD_MSR_CMDBUSY;
}
FLOPPY_DPRINTF("%s: %02x\n", __func__, value);
fdctrl->fifo[fdctrl->data_pos++] = value;
if (fdctrl->data_pos == fdctrl->data_len) {
/* We now have all parameters
* and will be able to treat the command
*/
if (fdctrl->data_state & FD_STATE_FORMAT) {
fdctrl_format_sector(fdctrl);
return;
}
pos = command_to_handler[fdctrl->fifo[0] & 0xff];
FLOPPY_DPRINTF("treat %s command\n", handlers[pos].name);
(*handlers[pos].handler)(fdctrl, handlers[pos].direction);
}
}
static void fdctrl_result_timer(void *opaque)
{
FDCtrl *fdctrl = opaque;
FDrive *cur_drv = get_cur_drv(fdctrl);
/* Pretend we are spinning.
* This is needed for Coherent, which uses READ ID to check for
* sector interleaving.
*/
if (cur_drv->last_sect != 0) {
cur_drv->sect = (cur_drv->sect % cur_drv->last_sect) + 1;
}
/* READ_ID can't automatically succeed! */
if (fdctrl->check_media_rate &&
(fdctrl->dsr & FD_DSR_DRATEMASK) != cur_drv->media_rate) {
FLOPPY_DPRINTF("read id rate mismatch (fdc=%d, media=%d)\n",
fdctrl->dsr & FD_DSR_DRATEMASK, cur_drv->media_rate);
fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, FD_SR1_MA, 0x00);
} else {
fdctrl_stop_transfer(fdctrl, 0x00, 0x00, 0x00);
}
}
static void fdctrl_change_cb(void *opaque, bool load)
{
FDrive *drive = opaque;
drive->media_changed = 1;
fd_revalidate(drive);
}
static const BlockDevOps fdctrl_block_ops = {
.change_media_cb = fdctrl_change_cb,
};
/* Init functions */
static int fdctrl_connect_drives(FDCtrl *fdctrl)
{
unsigned int i;
FDrive *drive;
for (i = 0; i < MAX_FD; i++) {
drive = &fdctrl->drives[i];
drive->fdctrl = fdctrl;
if (drive->bs) {
if (bdrv_get_on_error(drive->bs, 0) != BLOCKDEV_ON_ERROR_ENOSPC) {
error_report("fdc doesn't support drive option werror");
return -1;
}
if (bdrv_get_on_error(drive->bs, 1) != BLOCKDEV_ON_ERROR_REPORT) {
error_report("fdc doesn't support drive option rerror");
return -1;
}
}
fd_init(drive);
fdctrl_change_cb(drive, 0);
if (drive->bs) {
bdrv_set_dev_ops(drive->bs, &fdctrl_block_ops, drive);
}
}
return 0;
}
ISADevice *fdctrl_init_isa(ISABus *bus, DriveInfo **fds)
{
ISADevice *dev;
dev = isa_try_create(bus, "isa-fdc");
if (!dev) {
return NULL;
}
if (fds[0]) {
qdev_prop_set_drive_nofail(&dev->qdev, "driveA", fds[0]->bdrv);
}
if (fds[1]) {
qdev_prop_set_drive_nofail(&dev->qdev, "driveB", fds[1]->bdrv);
}
qdev_init_nofail(&dev->qdev);
return dev;
}
void fdctrl_init_sysbus(qemu_irq irq, int dma_chann,
hwaddr mmio_base, DriveInfo **fds)
{
FDCtrl *fdctrl;
DeviceState *dev;
FDCtrlSysBus *sys;
dev = qdev_create(NULL, "sysbus-fdc");
sys = DO_UPCAST(FDCtrlSysBus, busdev.qdev, dev);
fdctrl = &sys->state;
fdctrl->dma_chann = dma_chann; /* FIXME */
if (fds[0]) {
qdev_prop_set_drive_nofail(dev, "driveA", fds[0]->bdrv);
}
if (fds[1]) {
qdev_prop_set_drive_nofail(dev, "driveB", fds[1]->bdrv);
}
qdev_init_nofail(dev);
sysbus_connect_irq(&sys->busdev, 0, irq);
sysbus_mmio_map(&sys->busdev, 0, mmio_base);
}
void sun4m_fdctrl_init(qemu_irq irq, hwaddr io_base,
DriveInfo **fds, qemu_irq *fdc_tc)
{
DeviceState *dev;
FDCtrlSysBus *sys;
dev = qdev_create(NULL, "SUNW,fdtwo");
if (fds[0]) {
qdev_prop_set_drive_nofail(dev, "drive", fds[0]->bdrv);
}
qdev_init_nofail(dev);
sys = DO_UPCAST(FDCtrlSysBus, busdev.qdev, dev);
sysbus_connect_irq(&sys->busdev, 0, irq);
sysbus_mmio_map(&sys->busdev, 0, io_base);
*fdc_tc = qdev_get_gpio_in(dev, 0);
}
static int fdctrl_init_common(FDCtrl *fdctrl)
{
int i, j;
static int command_tables_inited = 0;
/* Fill 'command_to_handler' lookup table */
if (!command_tables_inited) {
command_tables_inited = 1;
for (i = ARRAY_SIZE(handlers) - 1; i >= 0; i--) {
for (j = 0; j < sizeof(command_to_handler); j++) {
if ((j & handlers[i].mask) == handlers[i].value) {
command_to_handler[j] = i;
}
}
}
}
FLOPPY_DPRINTF("init controller\n");
fdctrl->fifo = qemu_memalign(512, FD_SECTOR_LEN);
fdctrl->fifo_size = 512;
fdctrl->result_timer = qemu_new_timer_ns(vm_clock,
fdctrl_result_timer, fdctrl);
fdctrl->version = 0x90; /* Intel 82078 controller */
fdctrl->config = FD_CONFIG_EIS | FD_CONFIG_EFIFO; /* Implicit seek, polling & FIFO enabled */
fdctrl->num_floppies = MAX_FD;
if (fdctrl->dma_chann != -1)
DMA_register_channel(fdctrl->dma_chann, &fdctrl_transfer_handler, fdctrl);
return fdctrl_connect_drives(fdctrl);
}
static const MemoryRegionPortio fdc_portio_list[] = {
{ 1, 5, 1, .read = fdctrl_read, .write = fdctrl_write },
{ 7, 1, 1, .read = fdctrl_read, .write = fdctrl_write },
PORTIO_END_OF_LIST(),
};
static int isabus_fdc_init1(ISADevice *dev)
{
FDCtrlISABus *isa = DO_UPCAST(FDCtrlISABus, busdev, dev);
FDCtrl *fdctrl = &isa->state;
int ret;
isa_register_portio_list(dev, isa->iobase, fdc_portio_list, fdctrl, "fdc");
isa_init_irq(&isa->busdev, &fdctrl->irq, isa->irq);
fdctrl->dma_chann = isa->dma;
qdev_set_legacy_instance_id(&dev->qdev, isa->iobase, 2);
ret = fdctrl_init_common(fdctrl);
add_boot_device_path(isa->bootindexA, &dev->qdev, "/floppy@0");
add_boot_device_path(isa->bootindexB, &dev->qdev, "/floppy@1");
return ret;
}
static int sysbus_fdc_init1(SysBusDevice *dev)
{
FDCtrlSysBus *sys = DO_UPCAST(FDCtrlSysBus, busdev, dev);
FDCtrl *fdctrl = &sys->state;
int ret;
memory_region_init_io(&fdctrl->iomem, &fdctrl_mem_ops, fdctrl, "fdc", 0x08);
sysbus_init_mmio(dev, &fdctrl->iomem);
sysbus_init_irq(dev, &fdctrl->irq);
qdev_init_gpio_in(&dev->qdev, fdctrl_handle_tc, 1);
fdctrl->dma_chann = -1;
qdev_set_legacy_instance_id(&dev->qdev, 0 /* io */, 2); /* FIXME */
ret = fdctrl_init_common(fdctrl);
return ret;
}
static int sun4m_fdc_init1(SysBusDevice *dev)
{
FDCtrl *fdctrl = &(FROM_SYSBUS(FDCtrlSysBus, dev)->state);
memory_region_init_io(&fdctrl->iomem, &fdctrl_mem_strict_ops, fdctrl,
"fdctrl", 0x08);
sysbus_init_mmio(dev, &fdctrl->iomem);
sysbus_init_irq(dev, &fdctrl->irq);
qdev_init_gpio_in(&dev->qdev, fdctrl_handle_tc, 1);
fdctrl->sun4m = 1;
qdev_set_legacy_instance_id(&dev->qdev, 0 /* io */, 2); /* FIXME */
return fdctrl_init_common(fdctrl);
}
FDriveType isa_fdc_get_drive_type(ISADevice *fdc, int i)
{
FDCtrlISABus *isa = DO_UPCAST(FDCtrlISABus, busdev, fdc);
return isa->state.drives[i].drive;
}
static const VMStateDescription vmstate_isa_fdc ={
.name = "fdc",
.version_id = 2,
.minimum_version_id = 2,
.fields = (VMStateField []) {
VMSTATE_STRUCT(state, FDCtrlISABus, 0, vmstate_fdc, FDCtrl),
VMSTATE_END_OF_LIST()
}
};
static Property isa_fdc_properties[] = {
DEFINE_PROP_HEX32("iobase", FDCtrlISABus, iobase, 0x3f0),
DEFINE_PROP_UINT32("irq", FDCtrlISABus, irq, 6),
DEFINE_PROP_UINT32("dma", FDCtrlISABus, dma, 2),
DEFINE_PROP_DRIVE("driveA", FDCtrlISABus, state.drives[0].bs),
DEFINE_PROP_DRIVE("driveB", FDCtrlISABus, state.drives[1].bs),
DEFINE_PROP_INT32("bootindexA", FDCtrlISABus, bootindexA, -1),
DEFINE_PROP_INT32("bootindexB", FDCtrlISABus, bootindexB, -1),
DEFINE_PROP_BIT("check_media_rate", FDCtrlISABus, state.check_media_rate,
0, true),
DEFINE_PROP_END_OF_LIST(),
};
static void isabus_fdc_class_init1(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
ISADeviceClass *ic = ISA_DEVICE_CLASS(klass);
ic->init = isabus_fdc_init1;
dc->fw_name = "fdc";
dc->no_user = 1;
dc->reset = fdctrl_external_reset_isa;
dc->vmsd = &vmstate_isa_fdc;
dc->props = isa_fdc_properties;
}
static TypeInfo isa_fdc_info = {
.name = "isa-fdc",
.parent = TYPE_ISA_DEVICE,
.instance_size = sizeof(FDCtrlISABus),
.class_init = isabus_fdc_class_init1,
};
static const VMStateDescription vmstate_sysbus_fdc ={
.name = "fdc",
.version_id = 2,
.minimum_version_id = 2,
.fields = (VMStateField []) {
VMSTATE_STRUCT(state, FDCtrlSysBus, 0, vmstate_fdc, FDCtrl),
VMSTATE_END_OF_LIST()
}
};
static Property sysbus_fdc_properties[] = {
DEFINE_PROP_DRIVE("driveA", FDCtrlSysBus, state.drives[0].bs),
DEFINE_PROP_DRIVE("driveB", FDCtrlSysBus, state.drives[1].bs),
DEFINE_PROP_END_OF_LIST(),
};
static void sysbus_fdc_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
k->init = sysbus_fdc_init1;
dc->reset = fdctrl_external_reset_sysbus;
dc->vmsd = &vmstate_sysbus_fdc;
dc->props = sysbus_fdc_properties;
}
static TypeInfo sysbus_fdc_info = {
.name = "sysbus-fdc",
.parent = TYPE_SYS_BUS_DEVICE,
.instance_size = sizeof(FDCtrlSysBus),
.class_init = sysbus_fdc_class_init,
};
static Property sun4m_fdc_properties[] = {
DEFINE_PROP_DRIVE("drive", FDCtrlSysBus, state.drives[0].bs),
DEFINE_PROP_END_OF_LIST(),
};
static void sun4m_fdc_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
k->init = sun4m_fdc_init1;
dc->reset = fdctrl_external_reset_sysbus;
dc->vmsd = &vmstate_sysbus_fdc;
dc->props = sun4m_fdc_properties;
}
static TypeInfo sun4m_fdc_info = {
.name = "SUNW,fdtwo",
.parent = TYPE_SYS_BUS_DEVICE,
.instance_size = sizeof(FDCtrlSysBus),
.class_init = sun4m_fdc_class_init,
};
static void fdc_register_types(void)
{
type_register_static(&isa_fdc_info);
type_register_static(&sysbus_fdc_info);
type_register_static(&sun4m_fdc_info);
}
type_init(fdc_register_types)
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