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-rw-r--r--hw/fdc.c1757
1 files changed, 0 insertions, 1757 deletions
diff --git a/hw/fdc.c b/hw/fdc.c
deleted file mode 100644
index 3890ace..0000000
--- a/hw/fdc.c
+++ /dev/null
@@ -1,1757 +0,0 @@
-/*
- * QEMU Floppy disk emulator (Intel 82078)
- *
- * Copyright (c) 2003 Jocelyn Mayer
- *
- * 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 "vl.h"
-
-/********************************************************/
-/* debug Floppy devices */
-//#define DEBUG_FLOPPY
-
-#ifdef DEBUG_FLOPPY
-#define FLOPPY_DPRINTF(fmt, args...) \
-do { printf("FLOPPY: " fmt , ##args); } while (0)
-#else
-#define FLOPPY_DPRINTF(fmt, args...)
-#endif
-
-#define FLOPPY_ERROR(fmt, args...) \
-do { printf("FLOPPY ERROR: %s: " fmt, __func__ , ##args); } while (0)
-
-/********************************************************/
-/* Floppy drive emulation */
-
-/* Will always be a fixed parameter for us */
-#define FD_SECTOR_LEN 512
-#define FD_SECTOR_SC 2 /* Sector size code */
-
-/* Floppy disk drive emulation */
-typedef enum fdisk_type_t {
- FDRIVE_DISK_288 = 0x01, /* 2.88 MB disk */
- FDRIVE_DISK_144 = 0x02, /* 1.44 MB disk */
- FDRIVE_DISK_720 = 0x03, /* 720 kB disk */
- FDRIVE_DISK_USER = 0x04, /* User defined geometry */
- FDRIVE_DISK_NONE = 0x05, /* No disk */
-} fdisk_type_t;
-
-typedef enum fdrive_type_t {
- FDRIVE_DRV_144 = 0x00, /* 1.44 MB 3"5 drive */
- FDRIVE_DRV_288 = 0x01, /* 2.88 MB 3"5 drive */
- FDRIVE_DRV_120 = 0x02, /* 1.2 MB 5"25 drive */
- FDRIVE_DRV_NONE = 0x03, /* No drive connected */
-} fdrive_type_t;
-
-typedef enum fdrive_flags_t {
- FDRIVE_MOTOR_ON = 0x01, /* motor on/off */
- FDRIVE_REVALIDATE = 0x02, /* Revalidated */
-} fdrive_flags_t;
-
-typedef enum fdisk_flags_t {
- FDISK_DBL_SIDES = 0x01,
-} fdisk_flags_t;
-
-typedef struct fdrive_t {
- BlockDriverState *bs;
- /* Drive status */
- fdrive_type_t drive;
- fdrive_flags_t drflags;
- uint8_t perpendicular; /* 2.88 MB access mode */
- /* Position */
- uint8_t head;
- uint8_t track;
- uint8_t sect;
- /* Last operation status */
- uint8_t dir; /* Direction */
- uint8_t rw; /* Read/write */
- /* Media */
- fdisk_flags_t 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 */
-} fdrive_t;
-
-static void fd_init (fdrive_t *drv, BlockDriverState *bs)
-{
- /* Drive */
- drv->bs = bs;
- drv->drive = FDRIVE_DRV_NONE;
- drv->drflags = 0;
- drv->perpendicular = 0;
- /* Disk */
- drv->last_sect = 0;
- drv->max_track = 0;
-}
-
-static int _fd_sector (uint8_t head, uint8_t track,
- uint8_t sect, uint8_t last_sect)
-{
- return (((track * 2) + head) * last_sect) + sect - 1;
-}
-
-/* Returns current position, in sectors, for given drive */
-static int fd_sector (fdrive_t *drv)
-{
- return _fd_sector(drv->head, drv->track, drv->sect, drv->last_sect);
-}
-
-static int fd_seek (fdrive_t *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(head, track, sect, drv->last_sect);
- ret = 0;
- if (sector != fd_sector(drv)) {
-#if 0
- if (!enable_seek) {
- FLOPPY_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)
- ret = 1;
- drv->track = track;
- drv->sect = sect;
- }
-
- return ret;
-}
-
-/* Set drive back to track 0 */
-static void fd_recalibrate (fdrive_t *drv)
-{
- FLOPPY_DPRINTF("recalibrate\n");
- drv->head = 0;
- drv->track = 0;
- drv->sect = 1;
- drv->dir = 1;
- drv->rw = 0;
-}
-
-/* Recognize floppy formats */
-typedef struct fd_format_t {
- fdrive_type_t drive;
- fdisk_type_t disk;
- uint8_t last_sect;
- uint8_t max_track;
- uint8_t max_head;
- const unsigned char *str;
-} fd_format_t;
-
-static fd_format_t fd_formats[] = {
- /* First entry is default format */
- /* 1.44 MB 3"1/2 floppy disks */
- { FDRIVE_DRV_144, FDRIVE_DISK_144, 18, 80, 1, "1.44 MB 3\"1/2", },
- { FDRIVE_DRV_144, FDRIVE_DISK_144, 20, 80, 1, "1.6 MB 3\"1/2", },
- { FDRIVE_DRV_144, FDRIVE_DISK_144, 21, 80, 1, "1.68 MB 3\"1/2", },
- { FDRIVE_DRV_144, FDRIVE_DISK_144, 21, 82, 1, "1.72 MB 3\"1/2", },
- { FDRIVE_DRV_144, FDRIVE_DISK_144, 21, 83, 1, "1.74 MB 3\"1/2", },
- { FDRIVE_DRV_144, FDRIVE_DISK_144, 22, 80, 1, "1.76 MB 3\"1/2", },
- { FDRIVE_DRV_144, FDRIVE_DISK_144, 23, 80, 1, "1.84 MB 3\"1/2", },
- { FDRIVE_DRV_144, FDRIVE_DISK_144, 24, 80, 1, "1.92 MB 3\"1/2", },
- /* 2.88 MB 3"1/2 floppy disks */
- { FDRIVE_DRV_288, FDRIVE_DISK_288, 36, 80, 1, "2.88 MB 3\"1/2", },
- { FDRIVE_DRV_288, FDRIVE_DISK_288, 39, 80, 1, "3.12 MB 3\"1/2", },
- { FDRIVE_DRV_288, FDRIVE_DISK_288, 40, 80, 1, "3.2 MB 3\"1/2", },
- { FDRIVE_DRV_288, FDRIVE_DISK_288, 44, 80, 1, "3.52 MB 3\"1/2", },
- { FDRIVE_DRV_288, FDRIVE_DISK_288, 48, 80, 1, "3.84 MB 3\"1/2", },
- /* 720 kB 3"1/2 floppy disks */
- { FDRIVE_DRV_144, FDRIVE_DISK_720, 9, 80, 1, "720 kB 3\"1/2", },
- { FDRIVE_DRV_144, FDRIVE_DISK_720, 10, 80, 1, "800 kB 3\"1/2", },
- { FDRIVE_DRV_144, FDRIVE_DISK_720, 10, 82, 1, "820 kB 3\"1/2", },
- { FDRIVE_DRV_144, FDRIVE_DISK_720, 10, 83, 1, "830 kB 3\"1/2", },
- { FDRIVE_DRV_144, FDRIVE_DISK_720, 13, 80, 1, "1.04 MB 3\"1/2", },
- { FDRIVE_DRV_144, FDRIVE_DISK_720, 14, 80, 1, "1.12 MB 3\"1/2", },
- /* 1.2 MB 5"1/4 floppy disks */
- { FDRIVE_DRV_120, FDRIVE_DISK_288, 15, 80, 1, "1.2 kB 5\"1/4", },
- { FDRIVE_DRV_120, FDRIVE_DISK_288, 18, 80, 1, "1.44 MB 5\"1/4", },
- { FDRIVE_DRV_120, FDRIVE_DISK_288, 18, 82, 1, "1.48 MB 5\"1/4", },
- { FDRIVE_DRV_120, FDRIVE_DISK_288, 18, 83, 1, "1.49 MB 5\"1/4", },
- { FDRIVE_DRV_120, FDRIVE_DISK_288, 20, 80, 1, "1.6 MB 5\"1/4", },
- /* 720 kB 5"1/4 floppy disks */
- { FDRIVE_DRV_120, FDRIVE_DISK_288, 9, 80, 1, "720 kB 5\"1/4", },
- { FDRIVE_DRV_120, FDRIVE_DISK_288, 11, 80, 1, "880 kB 5\"1/4", },
- /* 360 kB 5"1/4 floppy disks */
- { FDRIVE_DRV_120, FDRIVE_DISK_288, 9, 40, 1, "360 kB 5\"1/4", },
- { FDRIVE_DRV_120, FDRIVE_DISK_288, 9, 40, 0, "180 kB 5\"1/4", },
- { FDRIVE_DRV_120, FDRIVE_DISK_288, 10, 41, 1, "410 kB 5\"1/4", },
- { FDRIVE_DRV_120, FDRIVE_DISK_288, 10, 42, 1, "420 kB 5\"1/4", },
- /* 320 kB 5"1/4 floppy disks */
- { FDRIVE_DRV_120, FDRIVE_DISK_288, 8, 40, 1, "320 kB 5\"1/4", },
- { FDRIVE_DRV_120, FDRIVE_DISK_288, 8, 40, 0, "160 kB 5\"1/4", },
- /* 360 kB must match 5"1/4 better than 3"1/2... */
- { FDRIVE_DRV_144, FDRIVE_DISK_720, 9, 80, 0, "360 kB 3\"1/2", },
- /* end */
- { FDRIVE_DRV_NONE, FDRIVE_DISK_NONE, -1, -1, 0, NULL, },
-};
-
-/* Revalidate a disk drive after a disk change */
-static void fd_revalidate (fdrive_t *drv)
-{
- fd_format_t *parse;
- int64_t nb_sectors, size;
- int i, first_match, match;
- int nb_heads, max_track, last_sect, ro;
-
- FLOPPY_DPRINTF("revalidate\n");
- drv->drflags &= ~FDRIVE_REVALIDATE;
- if (drv->bs != NULL && bdrv_is_inserted(drv->bs)) {
- ro = bdrv_is_read_only(drv->bs);
- bdrv_get_geometry_hint(drv->bs, &nb_heads, &max_track, &last_sect);
- if (nb_heads != 0 && max_track != 0 && last_sect != 0) {
- FLOPPY_DPRINTF("User defined disk (%d %d %d)",
- nb_heads - 1, max_track, last_sect);
- } else {
- bdrv_get_geometry(drv->bs, &nb_sectors);
- match = -1;
- first_match = -1;
- for (i = 0;; i++) {
- parse = &fd_formats[i];
- if (parse->drive == FDRIVE_DRV_NONE)
- break;
- if (drv->drive == parse->drive ||
- drv->drive == 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;
- drv->drive = parse->drive;
- FLOPPY_DPRINTF("%s floppy disk (%d h %d t %d s) %s\n", parse->str,
- 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;
- } else {
- FLOPPY_DPRINTF("No disk in drive\n");
- drv->last_sect = 0;
- drv->max_track = 0;
- drv->flags &= ~FDISK_DBL_SIDES;
- }
- drv->drflags |= FDRIVE_REVALIDATE;
-}
-
-/* Motor control */
-static void fd_start (fdrive_t *drv)
-{
- drv->drflags |= FDRIVE_MOTOR_ON;
-}
-
-static void fd_stop (fdrive_t *drv)
-{
- drv->drflags &= ~FDRIVE_MOTOR_ON;
-}
-
-/* Re-initialise a drives (motor off, repositioned) */
-static void fd_reset (fdrive_t *drv)
-{
- fd_stop(drv);
- fd_recalibrate(drv);
-}
-
-/********************************************************/
-/* Intel 82078 floppy disk controller emulation */
-
-static void fdctrl_reset (fdctrl_t *fdctrl, int do_irq);
-static void fdctrl_reset_fifo (fdctrl_t *fdctrl);
-static int fdctrl_transfer_handler (void *opaque, int nchan,
- int dma_pos, int dma_len);
-static void fdctrl_raise_irq (fdctrl_t *fdctrl, uint8_t status);
-static void fdctrl_result_timer(void *opaque);
-
-static uint32_t fdctrl_read_statusB (fdctrl_t *fdctrl);
-static uint32_t fdctrl_read_dor (fdctrl_t *fdctrl);
-static void fdctrl_write_dor (fdctrl_t *fdctrl, uint32_t value);
-static uint32_t fdctrl_read_tape (fdctrl_t *fdctrl);
-static void fdctrl_write_tape (fdctrl_t *fdctrl, uint32_t value);
-static uint32_t fdctrl_read_main_status (fdctrl_t *fdctrl);
-static void fdctrl_write_rate (fdctrl_t *fdctrl, uint32_t value);
-static uint32_t fdctrl_read_data (fdctrl_t *fdctrl);
-static void fdctrl_write_data (fdctrl_t *fdctrl, uint32_t value);
-static uint32_t fdctrl_read_dir (fdctrl_t *fdctrl);
-
-enum {
- FD_CTRL_ACTIVE = 0x01, /* XXX: suppress that */
- FD_CTRL_RESET = 0x02,
- FD_CTRL_SLEEP = 0x04, /* XXX: suppress that */
- FD_CTRL_BUSY = 0x08, /* dma transfer in progress */
- FD_CTRL_INTR = 0x10,
-};
-
-enum {
- FD_DIR_WRITE = 0,
- FD_DIR_READ = 1,
- FD_DIR_SCANE = 2,
- FD_DIR_SCANL = 3,
- FD_DIR_SCANH = 4,
-};
-
-enum {
- FD_STATE_CMD = 0x00,
- FD_STATE_STATUS = 0x01,
- FD_STATE_DATA = 0x02,
- FD_STATE_STATE = 0x03,
- FD_STATE_MULTI = 0x10,
- FD_STATE_SEEK = 0x20,
- FD_STATE_FORMAT = 0x40,
-};
-
-#define FD_STATE(state) ((state) & FD_STATE_STATE)
-#define FD_SET_STATE(state, new_state) \
-do { (state) = ((state) & ~FD_STATE_STATE) | (new_state); } while (0)
-#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_t {
- fdctrl_t *fdctrl;
- /* Controller's identification */
- uint8_t version;
- /* HW */
- int irq_lvl;
- int dma_chann;
- uint32_t io_base;
- /* Controller state */
- QEMUTimer *result_timer;
- uint8_t state;
- uint8_t dma_en;
- uint8_t cur_drv;
- uint8_t bootsel;
- /* Command FIFO */
- uint8_t fifo[FD_SECTOR_LEN];
- uint32_t data_pos;
- uint32_t data_len;
- uint8_t data_state;
- uint8_t data_dir;
- uint8_t int_status;
- uint8_t eot; /* last wanted sector */
- /* States kept only to be returned back */
- /* Timers state */
- uint8_t timer0;
- uint8_t timer1;
- /* 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 */
- fdrive_t drives[2];
-};
-
-static uint32_t fdctrl_read (void *opaque, uint32_t reg)
-{
- fdctrl_t *fdctrl = opaque;
- uint32_t retval;
-
- switch (reg & 0x07) {
-#ifdef TARGET_SPARC
- case 0x00:
- // Identify to Linux as S82078B
- retval = fdctrl_read_statusB(fdctrl);
- break;
-#endif
- case 0x01:
- retval = fdctrl_read_statusB(fdctrl);
- break;
- case 0x02:
- retval = fdctrl_read_dor(fdctrl);
- break;
- case 0x03:
- retval = fdctrl_read_tape(fdctrl);
- break;
- case 0x04:
- retval = fdctrl_read_main_status(fdctrl);
- break;
- case 0x05:
- retval = fdctrl_read_data(fdctrl);
- break;
- case 0x07:
- 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_t *fdctrl = opaque;
-
- FLOPPY_DPRINTF("write reg%d: 0x%02x\n", reg & 7, value);
-
- switch (reg & 0x07) {
- case 0x02:
- fdctrl_write_dor(fdctrl, value);
- break;
- case 0x03:
- fdctrl_write_tape(fdctrl, value);
- break;
- case 0x04:
- fdctrl_write_rate(fdctrl, value);
- break;
- case 0x05:
- fdctrl_write_data(fdctrl, value);
- break;
- default:
- break;
- }
-}
-
-static uint32_t fdctrl_read_mem (void *opaque, target_phys_addr_t reg)
-{
- return fdctrl_read(opaque, reg);
-}
-
-static void fdctrl_write_mem (void *opaque,
- target_phys_addr_t reg, uint32_t value)
-{
- fdctrl_write(opaque, reg, value);
-}
-
-static CPUReadMemoryFunc *fdctrl_mem_read[3] = {
- fdctrl_read_mem,
- fdctrl_read_mem,
- fdctrl_read_mem,
-};
-
-static CPUWriteMemoryFunc *fdctrl_mem_write[3] = {
- fdctrl_write_mem,
- fdctrl_write_mem,
- fdctrl_write_mem,
-};
-
-static void fd_change_cb (void *opaque)
-{
- fdrive_t *drv = opaque;
-
- FLOPPY_DPRINTF("disk change\n");
- fd_revalidate(drv);
-#if 0
- fd_recalibrate(drv);
- fdctrl_reset_fifo(drv->fdctrl);
- fdctrl_raise_irq(drv->fdctrl, 0x20);
-#endif
-}
-
-fdctrl_t *fdctrl_init (int irq_lvl, int dma_chann, int mem_mapped,
- uint32_t io_base,
- BlockDriverState **fds)
-{
- fdctrl_t *fdctrl;
- int io_mem;
- int i;
-
- FLOPPY_DPRINTF("init controller\n");
- fdctrl = qemu_mallocz(sizeof(fdctrl_t));
- if (!fdctrl)
- return NULL;
- fdctrl->result_timer = qemu_new_timer(vm_clock,
- fdctrl_result_timer, fdctrl);
-
- fdctrl->version = 0x90; /* Intel 82078 controller */
- fdctrl->irq_lvl = irq_lvl;
- fdctrl->dma_chann = dma_chann;
- fdctrl->io_base = io_base;
- fdctrl->config = 0x60; /* Implicit seek, polling & FIFO enabled */
- if (fdctrl->dma_chann != -1) {
- fdctrl->dma_en = 1;
- DMA_register_channel(dma_chann, &fdctrl_transfer_handler, fdctrl);
- } else {
- fdctrl->dma_en = 0;
- }
- for (i = 0; i < 2; i++) {
- fd_init(&fdctrl->drives[i], fds[i]);
- if (fds[i]) {
- bdrv_set_change_cb(fds[i],
- &fd_change_cb, &fdctrl->drives[i]);
- }
- }
- fdctrl_reset(fdctrl, 0);
- fdctrl->state = FD_CTRL_ACTIVE;
- if (mem_mapped) {
- io_mem = cpu_register_io_memory(0, fdctrl_mem_read, fdctrl_mem_write, fdctrl);
- cpu_register_physical_memory(io_base, 0x08, io_mem);
- } else {
- register_ioport_read(io_base + 0x01, 5, 1, &fdctrl_read, fdctrl);
- register_ioport_read(io_base + 0x07, 1, 1, &fdctrl_read, fdctrl);
- register_ioport_write(io_base + 0x01, 5, 1, &fdctrl_write, fdctrl);
- register_ioport_write(io_base + 0x07, 1, 1, &fdctrl_write, fdctrl);
- }
- for (i = 0; i < 2; i++) {
- fd_revalidate(&fdctrl->drives[i]);
- }
-
- return fdctrl;
-}
-
-/* XXX: may change if moved to bdrv */
-int fdctrl_get_drive_type(fdctrl_t *fdctrl, int drive_num)
-{
- return fdctrl->drives[drive_num].drive;
-}
-
-/* Change IRQ state */
-static void fdctrl_reset_irq (fdctrl_t *fdctrl)
-{
- FLOPPY_DPRINTF("Reset interrupt\n");
- pic_set_irq(fdctrl->irq_lvl, 0);
- fdctrl->state &= ~FD_CTRL_INTR;
-}
-
-static void fdctrl_raise_irq (fdctrl_t *fdctrl, uint8_t status)
-{
-#ifdef TARGET_SPARC
- // Sparc mutation
- if (!fdctrl->dma_en) {
- fdctrl->state &= ~FD_CTRL_BUSY;
- fdctrl->int_status = status;
- return;
- }
-#endif
- if (~(fdctrl->state & FD_CTRL_INTR)) {
- pic_set_irq(fdctrl->irq_lvl, 1);
- fdctrl->state |= FD_CTRL_INTR;
- }
- FLOPPY_DPRINTF("Set interrupt status to 0x%02x\n", status);
- fdctrl->int_status = status;
-}
-
-/* Reset controller */
-static void fdctrl_reset (fdctrl_t *fdctrl, int do_irq)
-{
- int i;
-
- FLOPPY_DPRINTF("reset controller\n");
- fdctrl_reset_irq(fdctrl);
- /* Initialise controller */
- fdctrl->cur_drv = 0;
- /* FIFO state */
- fdctrl->data_pos = 0;
- fdctrl->data_len = 0;
- fdctrl->data_state = FD_STATE_CMD;
- fdctrl->data_dir = FD_DIR_WRITE;
- for (i = 0; i < MAX_FD; i++)
- fd_reset(&fdctrl->drives[i]);
- fdctrl_reset_fifo(fdctrl);
- if (do_irq)
- fdctrl_raise_irq(fdctrl, 0xc0);
-}
-
-static inline fdrive_t *drv0 (fdctrl_t *fdctrl)
-{
- return &fdctrl->drives[fdctrl->bootsel];
-}
-
-static inline fdrive_t *drv1 (fdctrl_t *fdctrl)
-{
- return &fdctrl->drives[1 - fdctrl->bootsel];
-}
-
-static fdrive_t *get_cur_drv (fdctrl_t *fdctrl)
-{
- return fdctrl->cur_drv == 0 ? drv0(fdctrl) : drv1(fdctrl);
-}
-
-/* Status B register : 0x01 (read-only) */
-static uint32_t fdctrl_read_statusB (fdctrl_t *fdctrl)
-{
- FLOPPY_DPRINTF("status register: 0x00\n");
- return 0;
-}
-
-/* Digital output register : 0x02 */
-static uint32_t fdctrl_read_dor (fdctrl_t *fdctrl)
-{
- uint32_t retval = 0;
-
- /* Drive motors state indicators */
- if (drv0(fdctrl)->drflags & FDRIVE_MOTOR_ON)
- retval |= 1 << 5;
- if (drv1(fdctrl)->drflags & FDRIVE_MOTOR_ON)
- retval |= 1 << 4;
- /* DMA enable */
- retval |= fdctrl->dma_en << 3;
- /* Reset indicator */
- retval |= (fdctrl->state & FD_CTRL_RESET) == 0 ? 0x04 : 0;
- /* Selected drive */
- retval |= fdctrl->cur_drv;
- FLOPPY_DPRINTF("digital output register: 0x%02x\n", retval);
-
- return retval;
-}
-
-static void fdctrl_write_dor (fdctrl_t *fdctrl, uint32_t value)
-{
- /* Reset mode */
- if (fdctrl->state & FD_CTRL_RESET) {
- if (!(value & 0x04)) {
- FLOPPY_DPRINTF("Floppy controller in RESET state !\n");
- return;
- }
- }
- FLOPPY_DPRINTF("digital output register set to 0x%02x\n", value);
- /* Drive motors state indicators */
- if (value & 0x20)
- fd_start(drv1(fdctrl));
- else
- fd_stop(drv1(fdctrl));
- if (value & 0x10)
- fd_start(drv0(fdctrl));
- else
- fd_stop(drv0(fdctrl));
- /* DMA enable */
-#if 0
- if (fdctrl->dma_chann != -1)
- fdctrl->dma_en = 1 - ((value >> 3) & 1);
-#endif
- /* Reset */
- if (!(value & 0x04)) {
- if (!(fdctrl->state & FD_CTRL_RESET)) {
- FLOPPY_DPRINTF("controller enter RESET state\n");
- fdctrl->state |= FD_CTRL_RESET;
- }
- } else {
- if (fdctrl->state & FD_CTRL_RESET) {
- FLOPPY_DPRINTF("controller out of RESET state\n");
- fdctrl_reset(fdctrl, 1);
- fdctrl->state &= ~(FD_CTRL_RESET | FD_CTRL_SLEEP);
- }
- }
- /* Selected drive */
- fdctrl->cur_drv = value & 1;
-}
-
-/* Tape drive register : 0x03 */
-static uint32_t fdctrl_read_tape (fdctrl_t *fdctrl)
-{
- uint32_t retval = 0;
-
- /* Disk boot selection indicator */
- retval |= fdctrl->bootsel << 2;
- /* Tape indicators: never allowed */
- FLOPPY_DPRINTF("tape drive register: 0x%02x\n", retval);
-
- return retval;
-}
-
-static void fdctrl_write_tape (fdctrl_t *fdctrl, uint32_t value)
-{
- /* Reset mode */
- if (fdctrl->state & FD_CTRL_RESET) {
- 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->bootsel = (value >> 2) & 1;
- /* Tape indicators: never allow */
-}
-
-/* Main status register : 0x04 (read) */
-static uint32_t fdctrl_read_main_status (fdctrl_t *fdctrl)
-{
- uint32_t retval = 0;
-
- fdctrl->state &= ~(FD_CTRL_SLEEP | FD_CTRL_RESET);
- if (!(fdctrl->state & FD_CTRL_BUSY)) {
- /* Data transfer allowed */
- retval |= 0x80;
- /* Data transfer direction indicator */
- if (fdctrl->data_dir == FD_DIR_READ)
- retval |= 0x40;
- }
- /* Should handle 0x20 for SPECIFY command */
- /* Command busy indicator */
- if (FD_STATE(fdctrl->data_state) == FD_STATE_DATA ||
- FD_STATE(fdctrl->data_state) == FD_STATE_STATUS)
- retval |= 0x10;
- FLOPPY_DPRINTF("main status register: 0x%02x\n", retval);
-
- return retval;
-}
-
-/* Data select rate register : 0x04 (write) */
-static void fdctrl_write_rate (fdctrl_t *fdctrl, uint32_t value)
-{
- /* Reset mode */
- if (fdctrl->state & FD_CTRL_RESET) {
- FLOPPY_DPRINTF("Floppy controller in RESET state !\n");
- return;
- }
- FLOPPY_DPRINTF("select rate register set to 0x%02x\n", value);
- /* Reset: autoclear */
- if (value & 0x80) {
- fdctrl->state |= FD_CTRL_RESET;
- fdctrl_reset(fdctrl, 1);
- fdctrl->state &= ~FD_CTRL_RESET;
- }
- if (value & 0x40) {
- fdctrl->state |= FD_CTRL_SLEEP;
- fdctrl_reset(fdctrl, 1);
- }
-// fdctrl.precomp = (value >> 2) & 0x07;
-}
-
-/* Digital input register : 0x07 (read-only) */
-static uint32_t fdctrl_read_dir (fdctrl_t *fdctrl)
-{
- uint32_t retval = 0;
-
- if (drv0(fdctrl)->drflags & FDRIVE_REVALIDATE ||
- drv1(fdctrl)->drflags & FDRIVE_REVALIDATE)
- retval |= 0x80;
- if (retval != 0)
- FLOPPY_DPRINTF("Floppy digital input register: 0x%02x\n", retval);
- drv0(fdctrl)->drflags &= ~FDRIVE_REVALIDATE;
- drv1(fdctrl)->drflags &= ~FDRIVE_REVALIDATE;
-
- return retval;
-}
-
-/* FIFO state control */
-static void fdctrl_reset_fifo (fdctrl_t *fdctrl)
-{
- fdctrl->data_dir = FD_DIR_WRITE;
- fdctrl->data_pos = 0;
- FD_SET_STATE(fdctrl->data_state, FD_STATE_CMD);
-}
-
-/* Set FIFO status for the host to read */
-static void fdctrl_set_fifo (fdctrl_t *fdctrl, int fifo_len, int do_irq)
-{
- fdctrl->data_dir = FD_DIR_READ;
- fdctrl->data_len = fifo_len;
- fdctrl->data_pos = 0;
- FD_SET_STATE(fdctrl->data_state, FD_STATE_STATUS);
- if (do_irq)
- fdctrl_raise_irq(fdctrl, 0x00);
-}
-
-/* Set an error: unimplemented/unknown command */
-static void fdctrl_unimplemented (fdctrl_t *fdctrl)
-{
-#if 0
- fdrive_t *cur_drv;
-
- cur_drv = get_cur_drv(fdctrl);
- fdctrl->fifo[0] = 0x60 | (cur_drv->head << 2) | fdctrl->cur_drv;
- fdctrl->fifo[1] = 0x00;
- fdctrl->fifo[2] = 0x00;
- fdctrl_set_fifo(fdctrl, 3, 1);
-#else
- // fdctrl_reset_fifo(fdctrl);
- fdctrl->fifo[0] = 0x80;
- fdctrl_set_fifo(fdctrl, 1, 0);
-#endif
-}
-
-/* Callback for transfer end (stop or abort) */
-static void fdctrl_stop_transfer (fdctrl_t *fdctrl, uint8_t status0,
- uint8_t status1, uint8_t status2)
-{
- fdrive_t *cur_drv;
-
- cur_drv = get_cur_drv(fdctrl);
- FLOPPY_DPRINTF("transfer status: %02x %02x %02x (%02x)\n",
- status0, status1, status2,
- status0 | (cur_drv->head << 2) | fdctrl->cur_drv);
- fdctrl->fifo[0] = status0 | (cur_drv->head << 2) | fdctrl->cur_drv;
- 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->state & FD_CTRL_BUSY) {
- DMA_release_DREQ(fdctrl->dma_chann);
- fdctrl->state &= ~FD_CTRL_BUSY;
- }
- fdctrl_set_fifo(fdctrl, 7, 1);
-}
-
-/* Prepare a data transfer (either DMA or FIFO) */
-static void fdctrl_start_transfer (fdctrl_t *fdctrl, int direction)
-{
- fdrive_t *cur_drv;
- uint8_t kh, kt, ks;
- int did_seek;
-
- fdctrl->cur_drv = fdctrl->fifo[1] & 1;
- 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",
- fdctrl->cur_drv, kh, kt, ks,
- _fd_sector(kh, kt, ks, cur_drv->last_sect));
- did_seek = 0;
- switch (fd_seek(cur_drv, kh, kt, ks, fdctrl->config & 0x40)) {
- case 2:
- /* sect too big */
- fdctrl_stop_transfer(fdctrl, 0x40, 0x00, 0x00);
- fdctrl->fifo[3] = kt;
- fdctrl->fifo[4] = kh;
- fdctrl->fifo[5] = ks;
- return;
- case 3:
- /* track too big */
- fdctrl_stop_transfer(fdctrl, 0x40, 0x80, 0x00);
- fdctrl->fifo[3] = kt;
- fdctrl->fifo[4] = kh;
- fdctrl->fifo[5] = ks;
- return;
- case 4:
- /* No seek enabled */
- fdctrl_stop_transfer(fdctrl, 0x40, 0x00, 0x00);
- fdctrl->fifo[3] = kt;
- fdctrl->fifo[4] = kh;
- fdctrl->fifo[5] = ks;
- return;
- case 1:
- did_seek = 1;
- break;
- default:
- break;
- }
- /* Set the FIFO state */
- fdctrl->data_dir = direction;
- fdctrl->data_pos = 0;
- FD_SET_STATE(fdctrl->data_state, FD_STATE_DATA); /* FIFO ready for data */
- 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];
- tmp = (cur_drv->last_sect - ks + 1);
- if (fdctrl->fifo[0] & 0x80)
- tmp += cur_drv->last_sect;
- fdctrl->data_len *= tmp;
- }
- fdctrl->eot = fdctrl->fifo[6];
- if (fdctrl->dma_en) {
- 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->state |= FD_CTRL_BUSY;
- /* 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_ERROR("dma_mode=%d direction=%d\n", dma_mode, direction);
- }
- }
- FLOPPY_DPRINTF("start non-DMA transfer\n");
- /* IO based transfer: calculate len */
- fdctrl_raise_irq(fdctrl, 0x00);
-
- return;
-}
-
-/* Prepare a transfer of deleted data */
-static void fdctrl_start_transfer_del (fdctrl_t *fdctrl, int direction)
-{
- /* We don't handle deleted data,
- * so we don't return *ANYTHING*
- */
- fdctrl_stop_transfer(fdctrl, 0x60, 0x00, 0x00);
-}
-
-/* handlers for DMA transfers */
-static int fdctrl_transfer_handler (void *opaque, int nchan,
- int dma_pos, int dma_len)
-{
- fdctrl_t *fdctrl;
- fdrive_t *cur_drv;
- int len, start_pos, rel_pos;
- uint8_t status0 = 0x00, status1 = 0x00, status2 = 0x00;
-
- fdctrl = opaque;
- if (!(fdctrl->state & FD_CTRL_BUSY)) {
- 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 = 0x04;
- 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, 0x60, 0x00, 0x00);
- else
- fdctrl_stop_transfer(fdctrl, 0x40, 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, fdctrl->cur_drv, cur_drv->head,
- cur_drv->track, cur_drv->sect, fd_sector(cur_drv),
- fd_sector(cur_drv) * 512);
- 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);
-/* cpu_physical_memory_write(addr + fdctrl->data_pos, */
-/* fdctrl->fifo + rel_pos, len); */
- break;
- case FD_DIR_WRITE:
- /* WRITE commands */
- DMA_read_memory (nchan, fdctrl->fifo + rel_pos,
- fdctrl->data_pos, len);
-/* cpu_physical_memory_read(addr + fdctrl->data_pos, */
-/* fdctrl->fifo + rel_pos, len); */
- if (bdrv_write(cur_drv->bs, fd_sector(cur_drv),
- fdctrl->fifo, 1) < 0) {
- FLOPPY_ERROR("writting sector %d\n", fd_sector(cur_drv));
- fdctrl_stop_transfer(fdctrl, 0x60, 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);
-/* cpu_physical_memory_read(addr + fdctrl->data_pos, */
-/* tmpbuf, len); */
- ret = memcmp(tmpbuf, fdctrl->fifo + rel_pos, len);
- if (ret == 0) {
- status2 = 0x08;
- 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 */
- FLOPPY_DPRINTF("seek to next sector (%d %02x %02x => %d) (%d)\n",
- cur_drv->head, cur_drv->track, cur_drv->sect,
- fd_sector(cur_drv),
- fdctrl->data_pos - len);
- /* XXX: cur_drv->sect >= cur_drv->last_sect should be an
- error in fact */
- if (cur_drv->sect >= cur_drv->last_sect ||
- cur_drv->sect == fdctrl->eot) {
- cur_drv->sect = 1;
- if (FD_MULTI_TRACK(fdctrl->data_state)) {
- if (cur_drv->head == 0 &&
- (cur_drv->flags & FDISK_DBL_SIDES) != 0) {
- cur_drv->head = 1;
- } else {
- cur_drv->head = 0;
- cur_drv->track++;
- if ((cur_drv->flags & FDISK_DBL_SIDES) == 0)
- break;
- }
- } else {
- cur_drv->track++;
- break;
- }
- FLOPPY_DPRINTF("seek to next track (%d %02x %02x => %d)\n",
- cur_drv->head, cur_drv->track,
- cur_drv->sect, fd_sector(cur_drv));
- } else {
- cur_drv->sect++;
- }
- }
- }
-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 = 0x08;
- if (FD_DID_SEEK(fdctrl->data_state))
- status0 |= 0x20;
- fdctrl->data_len -= len;
- // if (fdctrl->data_len == 0)
- fdctrl_stop_transfer(fdctrl, status0, status1, status2);
-transfer_error:
-
- return len;
-}
-
-/* Data register : 0x05 */
-static uint32_t fdctrl_read_data (fdctrl_t *fdctrl)
-{
- fdrive_t *cur_drv;
- uint32_t retval = 0;
- int pos, len;
-
- cur_drv = get_cur_drv(fdctrl);
- fdctrl->state &= ~FD_CTRL_SLEEP;
- if (FD_STATE(fdctrl->data_state) == FD_STATE_CMD) {
- FLOPPY_ERROR("can't read data in CMD state\n");
- return 0;
- }
- pos = fdctrl->data_pos;
- if (FD_STATE(fdctrl->data_state) == FD_STATE_DATA) {
- pos %= FD_SECTOR_LEN;
- if (pos == 0) {
- len = fdctrl->data_len - fdctrl->data_pos;
- if (len > FD_SECTOR_LEN)
- len = FD_SECTOR_LEN;
- bdrv_read(cur_drv->bs, fd_sector(cur_drv),
- fdctrl->fifo, 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 (FD_STATE(fdctrl->data_state) == FD_STATE_DATA) {
- fdctrl_stop_transfer(fdctrl, 0x20, 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_t *fdctrl)
-{
- fdrive_t *cur_drv;
- uint8_t kh, kt, ks;
- int did_seek;
-
- fdctrl->cur_drv = fdctrl->fifo[1] & 1;
- 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",
- fdctrl->cur_drv, kh, kt, ks,
- _fd_sector(kh, kt, ks, cur_drv->last_sect));
- did_seek = 0;
- switch (fd_seek(cur_drv, kh, kt, ks, fdctrl->config & 0x40)) {
- case 2:
- /* sect too big */
- fdctrl_stop_transfer(fdctrl, 0x40, 0x00, 0x00);
- fdctrl->fifo[3] = kt;
- fdctrl->fifo[4] = kh;
- fdctrl->fifo[5] = ks;
- return;
- case 3:
- /* track too big */
- fdctrl_stop_transfer(fdctrl, 0x40, 0x80, 0x00);
- fdctrl->fifo[3] = kt;
- fdctrl->fifo[4] = kh;
- fdctrl->fifo[5] = ks;
- return;
- case 4:
- /* No seek enabled */
- fdctrl_stop_transfer(fdctrl, 0x40, 0x00, 0x00);
- fdctrl->fifo[3] = kt;
- fdctrl->fifo[4] = kh;
- fdctrl->fifo[5] = ks;
- return;
- case 1:
- did_seek = 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_ERROR("formating sector %d\n", fd_sector(cur_drv));
- fdctrl_stop_transfer(fdctrl, 0x60, 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, 0x20, 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_write_data (fdctrl_t *fdctrl, uint32_t value)
-{
- fdrive_t *cur_drv;
-
- cur_drv = get_cur_drv(fdctrl);
- /* Reset mode */
- if (fdctrl->state & FD_CTRL_RESET) {
- FLOPPY_DPRINTF("Floppy controller in RESET state !\n");
- return;
- }
- fdctrl->state &= ~FD_CTRL_SLEEP;
- if (FD_STATE(fdctrl->data_state) == FD_STATE_STATUS) {
- FLOPPY_ERROR("can't write data in status mode\n");
- return;
- }
- /* Is it write command time ? */
- if (FD_STATE(fdctrl->data_state) == FD_STATE_DATA) {
- /* FIFO data write */
- fdctrl->fifo[fdctrl->data_pos++] = value;
- if (fdctrl->data_pos % FD_SECTOR_LEN == (FD_SECTOR_LEN - 1) ||
- fdctrl->data_pos == fdctrl->data_len) {
- bdrv_write(cur_drv->bs, fd_sector(cur_drv),
- fdctrl->fifo, FD_SECTOR_LEN);
- }
- /* Switch from transfer mode to status mode
- * then from status mode to command mode
- */
- if (FD_STATE(fdctrl->data_state) == FD_STATE_DATA)
- fdctrl_stop_transfer(fdctrl, 0x20, 0x00, 0x00);
- return;
- }
- if (fdctrl->data_pos == 0) {
- /* Command */
- switch (value & 0x5F) {
- case 0x46:
- /* READ variants */
- FLOPPY_DPRINTF("READ command\n");
- /* 8 parameters cmd */
- fdctrl->data_len = 9;
- goto enqueue;
- case 0x4C:
- /* READ_DELETED variants */
- FLOPPY_DPRINTF("READ_DELETED command\n");
- /* 8 parameters cmd */
- fdctrl->data_len = 9;
- goto enqueue;
- case 0x50:
- /* SCAN_EQUAL variants */
- FLOPPY_DPRINTF("SCAN_EQUAL command\n");
- /* 8 parameters cmd */
- fdctrl->data_len = 9;
- goto enqueue;
- case 0x56:
- /* VERIFY variants */
- FLOPPY_DPRINTF("VERIFY command\n");
- /* 8 parameters cmd */
- fdctrl->data_len = 9;
- goto enqueue;
- case 0x59:
- /* SCAN_LOW_OR_EQUAL variants */
- FLOPPY_DPRINTF("SCAN_LOW_OR_EQUAL command\n");
- /* 8 parameters cmd */
- fdctrl->data_len = 9;
- goto enqueue;
- case 0x5D:
- /* SCAN_HIGH_OR_EQUAL variants */
- FLOPPY_DPRINTF("SCAN_HIGH_OR_EQUAL command\n");
- /* 8 parameters cmd */
- fdctrl->data_len = 9;
- goto enqueue;
- default:
- break;
- }
- switch (value & 0x7F) {
- case 0x45:
- /* WRITE variants */
- FLOPPY_DPRINTF("WRITE command\n");
- /* 8 parameters cmd */
- fdctrl->data_len = 9;
- goto enqueue;
- case 0x49:
- /* WRITE_DELETED variants */
- FLOPPY_DPRINTF("WRITE_DELETED command\n");
- /* 8 parameters cmd */
- fdctrl->data_len = 9;
- goto enqueue;
- default:
- break;
- }
- switch (value) {
- case 0x03:
- /* SPECIFY */
- FLOPPY_DPRINTF("SPECIFY command\n");
- /* 1 parameter cmd */
- fdctrl->data_len = 3;
- goto enqueue;
- case 0x04:
- /* SENSE_DRIVE_STATUS */
- FLOPPY_DPRINTF("SENSE_DRIVE_STATUS command\n");
- /* 1 parameter cmd */
- fdctrl->data_len = 2;
- goto enqueue;
- case 0x07:
- /* RECALIBRATE */
- FLOPPY_DPRINTF("RECALIBRATE command\n");
- /* 1 parameter cmd */
- fdctrl->data_len = 2;
- goto enqueue;
- case 0x08:
- /* SENSE_INTERRUPT_STATUS */
- FLOPPY_DPRINTF("SENSE_INTERRUPT_STATUS command (%02x)\n",
- fdctrl->int_status);
- /* No parameters cmd: returns status if no interrupt */
-#if 0
- fdctrl->fifo[0] =
- fdctrl->int_status | (cur_drv->head << 2) | fdctrl->cur_drv;
-#else
- /* XXX: int_status handling is broken for read/write
- commands, so we do this hack. It should be suppressed
- ASAP */
- fdctrl->fifo[0] =
- 0x20 | (cur_drv->head << 2) | fdctrl->cur_drv;
-#endif
- fdctrl->fifo[1] = cur_drv->track;
- fdctrl_set_fifo(fdctrl, 2, 0);
- fdctrl_reset_irq(fdctrl);
- fdctrl->int_status = 0xC0;
- return;
- case 0x0E:
- /* DUMPREG */
- FLOPPY_DPRINTF("DUMPREG command\n");
- /* Drives position */
- fdctrl->fifo[0] = drv0(fdctrl)->track;
- fdctrl->fifo[1] = drv1(fdctrl)->track;
- fdctrl->fifo[2] = 0;
- fdctrl->fifo[3] = 0;
- /* timers */
- fdctrl->fifo[4] = fdctrl->timer0;
- fdctrl->fifo[5] = (fdctrl->timer1 << 1) | fdctrl->dma_en;
- 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, 0);
- return;
- case 0x0F:
- /* SEEK */
- FLOPPY_DPRINTF("SEEK command\n");
- /* 2 parameters cmd */
- fdctrl->data_len = 3;
- goto enqueue;
- case 0x10:
- /* VERSION */
- FLOPPY_DPRINTF("VERSION command\n");
- /* No parameters cmd */
- /* Controller's version */
- fdctrl->fifo[0] = fdctrl->version;
- fdctrl_set_fifo(fdctrl, 1, 1);
- return;
- case 0x12:
- /* PERPENDICULAR_MODE */
- FLOPPY_DPRINTF("PERPENDICULAR_MODE command\n");
- /* 1 parameter cmd */
- fdctrl->data_len = 2;
- goto enqueue;
- case 0x13:
- /* CONFIGURE */
- FLOPPY_DPRINTF("CONFIGURE command\n");
- /* 3 parameters cmd */
- fdctrl->data_len = 4;
- goto enqueue;
- case 0x14:
- /* UNLOCK */
- FLOPPY_DPRINTF("UNLOCK command\n");
- /* No parameters cmd */
- fdctrl->lock = 0;
- fdctrl->fifo[0] = 0;
- fdctrl_set_fifo(fdctrl, 1, 0);
- return;
- case 0x17:
- /* POWERDOWN_MODE */
- FLOPPY_DPRINTF("POWERDOWN_MODE command\n");
- /* 2 parameters cmd */
- fdctrl->data_len = 3;
- goto enqueue;
- case 0x18:
- /* PART_ID */
- FLOPPY_DPRINTF("PART_ID command\n");
- /* No parameters cmd */
- fdctrl->fifo[0] = 0x41; /* Stepping 1 */
- fdctrl_set_fifo(fdctrl, 1, 0);
- return;
- case 0x2C:
- /* SAVE */
- FLOPPY_DPRINTF("SAVE command\n");
- /* No parameters cmd */
- fdctrl->fifo[0] = 0;
- fdctrl->fifo[1] = 0;
- /* Drives position */
- fdctrl->fifo[2] = drv0(fdctrl)->track;
- fdctrl->fifo[3] = drv1(fdctrl)->track;
- fdctrl->fifo[4] = 0;
- fdctrl->fifo[5] = 0;
- /* 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, 1);
- return;
- case 0x33:
- /* OPTION */
- FLOPPY_DPRINTF("OPTION command\n");
- /* 1 parameter cmd */
- fdctrl->data_len = 2;
- goto enqueue;
- case 0x42:
- /* READ_TRACK */
- FLOPPY_DPRINTF("READ_TRACK command\n");
- /* 8 parameters cmd */
- fdctrl->data_len = 9;
- goto enqueue;
- case 0x4A:
- /* READ_ID */
- FLOPPY_DPRINTF("READ_ID command\n");
- /* 1 parameter cmd */
- fdctrl->data_len = 2;
- goto enqueue;
- case 0x4C:
- /* RESTORE */
- FLOPPY_DPRINTF("RESTORE command\n");
- /* 17 parameters cmd */
- fdctrl->data_len = 18;
- goto enqueue;
- case 0x4D:
- /* FORMAT_TRACK */
- FLOPPY_DPRINTF("FORMAT_TRACK command\n");
- /* 5 parameters cmd */
- fdctrl->data_len = 6;
- goto enqueue;
- case 0x8E:
- /* DRIVE_SPECIFICATION_COMMAND */
- FLOPPY_DPRINTF("DRIVE_SPECIFICATION_COMMAND command\n");
- /* 5 parameters cmd */
- fdctrl->data_len = 6;
- goto enqueue;
- case 0x8F:
- /* RELATIVE_SEEK_OUT */
- FLOPPY_DPRINTF("RELATIVE_SEEK_OUT command\n");
- /* 2 parameters cmd */
- fdctrl->data_len = 3;
- goto enqueue;
- case 0x94:
- /* LOCK */
- FLOPPY_DPRINTF("LOCK command\n");
- /* No parameters cmd */
- fdctrl->lock = 1;
- fdctrl->fifo[0] = 0x10;
- fdctrl_set_fifo(fdctrl, 1, 1);
- return;
- case 0xCD:
- /* FORMAT_AND_WRITE */
- FLOPPY_DPRINTF("FORMAT_AND_WRITE command\n");
- /* 10 parameters cmd */
- fdctrl->data_len = 11;
- goto enqueue;
- case 0xCF:
- /* RELATIVE_SEEK_IN */
- FLOPPY_DPRINTF("RELATIVE_SEEK_IN command\n");
- /* 2 parameters cmd */
- fdctrl->data_len = 3;
- goto enqueue;
- default:
- /* Unknown command */
- FLOPPY_ERROR("unknown command: 0x%02x\n", value);
- fdctrl_unimplemented(fdctrl);
- return;
- }
- }
-enqueue:
- 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;
- }
- switch (fdctrl->fifo[0] & 0x1F) {
- case 0x06:
- {
- /* READ variants */
- FLOPPY_DPRINTF("treat READ command\n");
- fdctrl_start_transfer(fdctrl, FD_DIR_READ);
- return;
- }
- case 0x0C:
- /* READ_DELETED variants */
-// FLOPPY_DPRINTF("treat READ_DELETED command\n");
- FLOPPY_ERROR("treat READ_DELETED command\n");
- fdctrl_start_transfer_del(fdctrl, FD_DIR_READ);
- return;
- case 0x16:
- /* VERIFY variants */
-// FLOPPY_DPRINTF("treat VERIFY command\n");
- FLOPPY_ERROR("treat VERIFY command\n");
- fdctrl_stop_transfer(fdctrl, 0x20, 0x00, 0x00);
- return;
- case 0x10:
- /* SCAN_EQUAL variants */
-// FLOPPY_DPRINTF("treat SCAN_EQUAL command\n");
- FLOPPY_ERROR("treat SCAN_EQUAL command\n");
- fdctrl_start_transfer(fdctrl, FD_DIR_SCANE);
- return;
- case 0x19:
- /* SCAN_LOW_OR_EQUAL variants */
-// FLOPPY_DPRINTF("treat SCAN_LOW_OR_EQUAL command\n");
- FLOPPY_ERROR("treat SCAN_LOW_OR_EQUAL command\n");
- fdctrl_start_transfer(fdctrl, FD_DIR_SCANL);
- return;
- case 0x1D:
- /* SCAN_HIGH_OR_EQUAL variants */
-// FLOPPY_DPRINTF("treat SCAN_HIGH_OR_EQUAL command\n");
- FLOPPY_ERROR("treat SCAN_HIGH_OR_EQUAL command\n");
- fdctrl_start_transfer(fdctrl, FD_DIR_SCANH);
- return;
- default:
- break;
- }
- switch (fdctrl->fifo[0] & 0x3F) {
- case 0x05:
- /* WRITE variants */
- FLOPPY_DPRINTF("treat WRITE command (%02x)\n", fdctrl->fifo[0]);
- fdctrl_start_transfer(fdctrl, FD_DIR_WRITE);
- return;
- case 0x09:
- /* WRITE_DELETED variants */
-// FLOPPY_DPRINTF("treat WRITE_DELETED command\n");
- FLOPPY_ERROR("treat WRITE_DELETED command\n");
- fdctrl_start_transfer_del(fdctrl, FD_DIR_WRITE);
- return;
- default:
- break;
- }
- switch (fdctrl->fifo[0]) {
- case 0x03:
- /* SPECIFY */
- FLOPPY_DPRINTF("treat SPECIFY command\n");
- fdctrl->timer0 = (fdctrl->fifo[1] >> 4) & 0xF;
- fdctrl->timer1 = fdctrl->fifo[2] >> 1;
- fdctrl->dma_en = 1 - (fdctrl->fifo[2] & 1) ;
- /* No result back */
- fdctrl_reset_fifo(fdctrl);
- break;
- case 0x04:
- /* SENSE_DRIVE_STATUS */
- FLOPPY_DPRINTF("treat SENSE_DRIVE_STATUS command\n");
- fdctrl->cur_drv = fdctrl->fifo[1] & 1;
- 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) |
- fdctrl->cur_drv |
- 0x28;
- fdctrl_set_fifo(fdctrl, 1, 0);
- break;
- case 0x07:
- /* RECALIBRATE */
- FLOPPY_DPRINTF("treat RECALIBRATE command\n");
- fdctrl->cur_drv = fdctrl->fifo[1] & 1;
- cur_drv = get_cur_drv(fdctrl);
- fd_recalibrate(cur_drv);
- fdctrl_reset_fifo(fdctrl);
- /* Raise Interrupt */
- fdctrl_raise_irq(fdctrl, 0x20);
- break;
- case 0x0F:
- /* SEEK */
- FLOPPY_DPRINTF("treat SEEK command\n");
- fdctrl->cur_drv = fdctrl->fifo[1] & 1;
- cur_drv = get_cur_drv(fdctrl);
- fd_start(cur_drv);
- if (fdctrl->fifo[2] <= cur_drv->track)
- cur_drv->dir = 1;
- else
- cur_drv->dir = 0;
- fdctrl_reset_fifo(fdctrl);
- if (fdctrl->fifo[2] > cur_drv->max_track) {
- fdctrl_raise_irq(fdctrl, 0x60);
- } else {
- cur_drv->track = fdctrl->fifo[2];
- /* Raise Interrupt */
- fdctrl_raise_irq(fdctrl, 0x20);
- }
- break;
- case 0x12:
- /* PERPENDICULAR_MODE */
- FLOPPY_DPRINTF("treat PERPENDICULAR_MODE command\n");
- if (fdctrl->fifo[1] & 0x80)
- cur_drv->perpendicular = fdctrl->fifo[1] & 0x7;
- /* No result back */
- fdctrl_reset_fifo(fdctrl);
- break;
- case 0x13:
- /* CONFIGURE */
- FLOPPY_DPRINTF("treat CONFIGURE command\n");
- fdctrl->config = fdctrl->fifo[2];
- fdctrl->precomp_trk = fdctrl->fifo[3];
- /* No result back */
- fdctrl_reset_fifo(fdctrl);
- break;
- case 0x17:
- /* POWERDOWN_MODE */
- FLOPPY_DPRINTF("treat POWERDOWN_MODE command\n");
- fdctrl->pwrd = fdctrl->fifo[1];
- fdctrl->fifo[0] = fdctrl->fifo[1];
- fdctrl_set_fifo(fdctrl, 1, 1);
- break;
- case 0x33:
- /* OPTION */
- FLOPPY_DPRINTF("treat OPTION command\n");
- /* No result back */
- fdctrl_reset_fifo(fdctrl);
- break;
- case 0x42:
- /* READ_TRACK */
-// FLOPPY_DPRINTF("treat READ_TRACK command\n");
- FLOPPY_ERROR("treat READ_TRACK command\n");
- fdctrl_start_transfer(fdctrl, FD_DIR_READ);
- break;
- case 0x4A:
- /* READ_ID */
- FLOPPY_DPRINTF("treat READ_ID command\n");
- /* XXX: should set main status register to busy */
- cur_drv->head = (fdctrl->fifo[1] >> 2) & 1;
- qemu_mod_timer(fdctrl->result_timer,
- qemu_get_clock(vm_clock) + (ticks_per_sec / 50));
- break;
- case 0x4C:
- /* RESTORE */
- FLOPPY_DPRINTF("treat RESTORE command\n");
- /* Drives position */
- drv0(fdctrl)->track = fdctrl->fifo[3];
- drv1(fdctrl)->track = fdctrl->fifo[4];
- /* 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);
- break;
- case 0x4D:
- /* FORMAT_TRACK */
- FLOPPY_DPRINTF("treat FORMAT_TRACK command\n");
- fdctrl->cur_drv = fdctrl->fifo[1] & 1;
- 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
- /* Bochs BIOS is buggy and don't send format informations
- * for each sector. So, pretend all's done right now...
- */
- fdctrl->data_state &= ~FD_STATE_FORMAT;
- fdctrl_stop_transfer(fdctrl, 0x00, 0x00, 0x00);
- break;
- case 0x8E:
- /* DRIVE_SPECIFICATION_COMMAND */
- FLOPPY_DPRINTF("treat DRIVE_SPECIFICATION_COMMAND command\n");
- 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, 1);
- } else {
- fdctrl_reset_fifo(fdctrl);
- }
- } else if (fdctrl->data_len > 7) {
- /* ERROR */
- fdctrl->fifo[0] = 0x80 |
- (cur_drv->head << 2) | fdctrl->cur_drv;
- fdctrl_set_fifo(fdctrl, 1, 1);
- }
- break;
- case 0x8F:
- /* RELATIVE_SEEK_OUT */
- FLOPPY_DPRINTF("treat RELATIVE_SEEK_OUT command\n");
- fdctrl->cur_drv = fdctrl->fifo[1] & 1;
- cur_drv = get_cur_drv(fdctrl);
- fd_start(cur_drv);
- cur_drv->dir = 0;
- if (fdctrl->fifo[2] + cur_drv->track >= cur_drv->max_track) {
- cur_drv->track = cur_drv->max_track - 1;
- } else {
- cur_drv->track += fdctrl->fifo[2];
- }
- fdctrl_reset_fifo(fdctrl);
- fdctrl_raise_irq(fdctrl, 0x20);
- break;
- case 0xCD:
- /* FORMAT_AND_WRITE */
-// FLOPPY_DPRINTF("treat FORMAT_AND_WRITE command\n");
- FLOPPY_ERROR("treat FORMAT_AND_WRITE command\n");
- fdctrl_unimplemented(fdctrl);
- break;
- case 0xCF:
- /* RELATIVE_SEEK_IN */
- FLOPPY_DPRINTF("treat RELATIVE_SEEK_IN command\n");
- fdctrl->cur_drv = fdctrl->fifo[1] & 1;
- cur_drv = get_cur_drv(fdctrl);
- fd_start(cur_drv);
- cur_drv->dir = 1;
- if (fdctrl->fifo[2] > cur_drv->track) {
- cur_drv->track = 0;
- } else {
- cur_drv->track -= fdctrl->fifo[2];
- }
- fdctrl_reset_fifo(fdctrl);
- /* Raise Interrupt */
- fdctrl_raise_irq(fdctrl, 0x20);
- break;
- }
- }
-}
-
-static void fdctrl_result_timer(void *opaque)
-{
- fdctrl_t *fdctrl = opaque;
- fdctrl_stop_transfer(fdctrl, 0x00, 0x00, 0x00);
-}
generated by cgit v1.1 at 2024-05-20 20:22:56 +0000