/* * QEMU Floppy disk emulator (Intel 82078) * * Copyright (c) 2003, 2007 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 "hw.h" #include "fdc.h" #include "block.h" #include "qemu-timer.h" #include "isa.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_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 char *str; } fd_format_t; static const 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) { const fd_format_t *parse; uint64_t nb_sectors, size; int i, first_match, match; int nb_heads, max_track, last_sect, ro; FLOPPY_DPRINTF("revalidate\n"); 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; } } /* 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 */ qemu_irq irq; int dma_chann; target_phys_addr_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; 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; /* Sun4m quirks? */ int sun4m; /* 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) { case 0x00: if (fdctrl->sun4m) { // Identify to Linux as S82078B retval = fdctrl_read_statusB(fdctrl); } else { retval = (uint32_t)(-1); } break; 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, (uint32_t)reg); } static void fdctrl_write_mem (void *opaque, target_phys_addr_t reg, uint32_t value) { fdctrl_write(opaque, (uint32_t)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_save (QEMUFile *f, fdrive_t *fd) { uint8_t tmp; tmp = fd->drflags; qemu_put_8s(f, &tmp); qemu_put_8s(f, &fd->head); qemu_put_8s(f, &fd->track); qemu_put_8s(f, &fd->sect); qemu_put_8s(f, &fd->dir); qemu_put_8s(f, &fd->rw); } static void fdc_save (QEMUFile *f, void *opaque) { fdctrl_t *s = opaque; qemu_put_8s(f, &s->state); qemu_put_8s(f, &s->dma_en); qemu_put_8s(f, &s->cur_drv); qemu_put_8s(f, &s->bootsel); qemu_put_buffer(f, s->fifo, FD_SECTOR_LEN); qemu_put_be32s(f, &s->data_pos); qemu_put_be32s(f, &s->data_len); qemu_put_8s(f, &s->data_state); qemu_put_8s(f, &s->data_dir); qemu_put_8s(f, &s->int_status); qemu_put_8s(f, &s->eot); qemu_put_8s(f, &s->timer0); qemu_put_8s(f, &s->timer1); qemu_put_8s(f, &s->precomp_trk); qemu_put_8s(f, &s->config); qemu_put_8s(f, &s->lock); qemu_put_8s(f, &s->pwrd); fd_save(f, &s->drives[0]); fd_save(f, &s->drives[1]); } static int fd_load (QEMUFile *f, fdrive_t *fd) { uint8_t tmp; qemu_get_8s(f, &tmp); fd->drflags = tmp; qemu_get_8s(f, &fd->head); qemu_get_8s(f, &fd->track); qemu_get_8s(f, &fd->sect); qemu_get_8s(f, &fd->dir); qemu_get_8s(f, &fd->rw); return 0; } static int fdc_load (QEMUFile *f, void *opaque, int version_id) { fdctrl_t *s = opaque; int ret; if (version_id != 1) return -EINVAL; qemu_get_8s(f, &s->state); qemu_get_8s(f, &s->dma_en); qemu_get_8s(f, &s->cur_drv); qemu_get_8s(f, &s->bootsel); qemu_get_buffer(f, s->fifo, FD_SECTOR_LEN); qemu_get_be32s(f, &s->data_pos); qemu_get_be32s(f, &s->data_len); qemu_get_8s(f, &s->data_state); qemu_get_8s(f, &s->data_dir); qemu_get_8s(f, &s->int_status); qemu_get_8s(f, &s->eot); qemu_get_8s(f, &s->timer0); qemu_get_8s(f, &s->timer1); qemu_get_8s(f, &s->precomp_trk); qemu_get_8s(f, &s->config); qemu_get_8s(f, &s->lock); qemu_get_8s(f, &s->pwrd); ret = fd_load(f, &s->drives[0]); if (ret == 0) ret = fd_load(f, &s->drives[1]); return ret; } static void fdctrl_external_reset(void *opaque) { fdctrl_t *s = opaque; fdctrl_reset(s, 0); } fdctrl_t *fdctrl_init (qemu_irq irq, int dma_chann, int mem_mapped, target_phys_addr_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->fifo = qemu_memalign(512, FD_SECTOR_LEN); if (fdctrl->fifo == NULL) { qemu_free(fdctrl); return NULL; } fdctrl->result_timer = qemu_new_timer(vm_clock, fdctrl_result_timer, fdctrl); fdctrl->version = 0x90; /* Intel 82078 controller */ fdctrl->irq = irq; fdctrl->dma_chann = dma_chann; fdctrl->io_base = io_base; fdctrl->config = 0x60; /* Implicit seek, polling & FIFO enabled */ fdctrl->sun4m = 0; 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]); } 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((uint32_t)io_base + 0x01, 5, 1, &fdctrl_read, fdctrl); register_ioport_read((uint32_t)io_base + 0x07, 1, 1, &fdctrl_read, fdctrl); register_ioport_write((uint32_t)io_base + 0x01, 5, 1, &fdctrl_write, fdctrl); register_ioport_write((uint32_t)io_base + 0x07, 1, 1, &fdctrl_write, fdctrl); } register_savevm("fdc", io_base, 1, fdc_save, fdc_load, fdctrl); qemu_register_reset(fdctrl_external_reset, fdctrl); for (i = 0; i < 2; i++) { fd_revalidate(&fdctrl->drives[i]); } return fdctrl; } fdctrl_t *sun4m_fdctrl_init (qemu_irq irq, target_phys_addr_t io_base, BlockDriverState **fds) { fdctrl_t *fdctrl; fdctrl = fdctrl_init(irq, 0, 1, io_base, fds); fdctrl->sun4m = 1; 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"); qemu_set_irq(fdctrl->irq, 0); fdctrl->state &= ~FD_CTRL_INTR; } static void fdctrl_raise_irq (fdctrl_t *fdctrl, uint8_t status) { // Sparc mutation if (fdctrl->sun4m && !fdctrl->dma_en) { fdctrl->state &= ~FD_CTRL_BUSY; fdctrl->int_status = status; return; } if (~(fdctrl->state & FD_CTRL_INTR)) { qemu_set_irq(fdctrl->irq, 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; } static int fdctrl_media_changed(fdrive_t *drv) { int ret; if (!drv->bs) return 0; ret = bdrv_media_changed(drv->bs); if (ret) { fd_revalidate(drv); } return ret; } /* Digital input register : 0x07 (read-only) */ static uint32_t fdctrl_read_dir (fdctrl_t *fdctrl) { uint32_t retval = 0; if (fdctrl_media_changed(drv0(fdctrl)) || fdctrl_media_changed(drv1(fdctrl))) retval |= 0x80; if (retval != 0) FLOPPY_DPRINTF("Floppy digital input register: 0x%02x\n", retval); 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] > 7 ? 7 : 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); break; case FD_DIR_WRITE: /* WRITE commands */ 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_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); 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, 1); } } 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("formatting 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, 1); } /* 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 /* 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); 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; fdrive_t *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; } fdctrl_stop_transfer(fdctrl, 0x00, 0x00, 0x00); }