X-Git-Url: https://repo.jachan.dev/qemu.git/blobdiff_plain/d06cddf517d2b33389c02971b353d10dd4edda1a..bdd4df332a1bdb20b7fa39ea741f7830e41e1187:/hw/fdc.c diff --git a/hw/fdc.c b/hw/fdc.c index 38fad587cb..bf8c1d9f13 100644 --- a/hw/fdc.c +++ b/hw/fdc.c @@ -36,6 +36,7 @@ #include "qdev-addr.h" #include "blockdev.h" #include "sysemu.h" +#include "qemu-log.h" /********************************************************/ /* debug Floppy devices */ @@ -48,12 +49,116 @@ #define FLOPPY_DPRINTF(fmt, ...) #endif -#define FLOPPY_ERROR(fmt, ...) \ - do { printf("FLOPPY ERROR: %s: " fmt, __func__ , ## __VA_ARGS__); } while (0) - /********************************************************/ /* Floppy drive emulation */ +typedef enum FDriveRate { + FDRIVE_RATE_500K = 0x00, /* 500 Kbps */ + FDRIVE_RATE_300K = 0x01, /* 300 Kbps */ + FDRIVE_RATE_250K = 0x02, /* 250 Kbps */ + FDRIVE_RATE_1M = 0x03, /* 1 Mbps */ +} FDriveRate; + +typedef struct FDFormat { + FDriveType drive; + uint8_t last_sect; + uint8_t max_track; + uint8_t max_head; + FDriveRate rate; +} FDFormat; + +static const FDFormat fd_formats[] = { + /* First entry is default format */ + /* 1.44 MB 3"1/2 floppy disks */ + { FDRIVE_DRV_144, 18, 80, 1, FDRIVE_RATE_500K, }, + { FDRIVE_DRV_144, 20, 80, 1, FDRIVE_RATE_500K, }, + { FDRIVE_DRV_144, 21, 80, 1, FDRIVE_RATE_500K, }, + { FDRIVE_DRV_144, 21, 82, 1, FDRIVE_RATE_500K, }, + { FDRIVE_DRV_144, 21, 83, 1, FDRIVE_RATE_500K, }, + { FDRIVE_DRV_144, 22, 80, 1, FDRIVE_RATE_500K, }, + { FDRIVE_DRV_144, 23, 80, 1, FDRIVE_RATE_500K, }, + { FDRIVE_DRV_144, 24, 80, 1, FDRIVE_RATE_500K, }, + /* 2.88 MB 3"1/2 floppy disks */ + { FDRIVE_DRV_288, 36, 80, 1, FDRIVE_RATE_1M, }, + { FDRIVE_DRV_288, 39, 80, 1, FDRIVE_RATE_1M, }, + { FDRIVE_DRV_288, 40, 80, 1, FDRIVE_RATE_1M, }, + { FDRIVE_DRV_288, 44, 80, 1, FDRIVE_RATE_1M, }, + { FDRIVE_DRV_288, 48, 80, 1, FDRIVE_RATE_1M, }, + /* 720 kB 3"1/2 floppy disks */ + { FDRIVE_DRV_144, 9, 80, 1, FDRIVE_RATE_250K, }, + { FDRIVE_DRV_144, 10, 80, 1, FDRIVE_RATE_250K, }, + { FDRIVE_DRV_144, 10, 82, 1, FDRIVE_RATE_250K, }, + { FDRIVE_DRV_144, 10, 83, 1, FDRIVE_RATE_250K, }, + { FDRIVE_DRV_144, 13, 80, 1, FDRIVE_RATE_250K, }, + { FDRIVE_DRV_144, 14, 80, 1, FDRIVE_RATE_250K, }, + /* 1.2 MB 5"1/4 floppy disks */ + { FDRIVE_DRV_120, 15, 80, 1, FDRIVE_RATE_500K, }, + { FDRIVE_DRV_120, 18, 80, 1, FDRIVE_RATE_500K, }, + { FDRIVE_DRV_120, 18, 82, 1, FDRIVE_RATE_500K, }, + { FDRIVE_DRV_120, 18, 83, 1, FDRIVE_RATE_500K, }, + { FDRIVE_DRV_120, 20, 80, 1, FDRIVE_RATE_500K, }, + /* 720 kB 5"1/4 floppy disks */ + { FDRIVE_DRV_120, 9, 80, 1, FDRIVE_RATE_250K, }, + { FDRIVE_DRV_120, 11, 80, 1, FDRIVE_RATE_250K, }, + /* 360 kB 5"1/4 floppy disks */ + { FDRIVE_DRV_120, 9, 40, 1, FDRIVE_RATE_300K, }, + { FDRIVE_DRV_120, 9, 40, 0, FDRIVE_RATE_300K, }, + { FDRIVE_DRV_120, 10, 41, 1, FDRIVE_RATE_300K, }, + { FDRIVE_DRV_120, 10, 42, 1, FDRIVE_RATE_300K, }, + /* 320 kB 5"1/4 floppy disks */ + { FDRIVE_DRV_120, 8, 40, 1, FDRIVE_RATE_250K, }, + { FDRIVE_DRV_120, 8, 40, 0, FDRIVE_RATE_250K, }, + /* 360 kB must match 5"1/4 better than 3"1/2... */ + { FDRIVE_DRV_144, 9, 80, 0, FDRIVE_RATE_250K, }, + /* end */ + { FDRIVE_DRV_NONE, -1, -1, 0, 0, }, +}; + +static void pick_geometry(BlockDriverState *bs, int *nb_heads, + int *max_track, int *last_sect, + FDriveType drive_in, FDriveType *drive, + FDriveRate *rate) +{ + const FDFormat *parse; + uint64_t nb_sectors, size; + int i, first_match, match; + + bdrv_get_geometry(bs, &nb_sectors); + match = -1; + first_match = -1; + for (i = 0; ; i++) { + parse = &fd_formats[i]; + if (parse->drive == FDRIVE_DRV_NONE) { + break; + } + if (drive_in == parse->drive || + drive_in == FDRIVE_DRV_NONE) { + size = (parse->max_head + 1) * parse->max_track * + parse->last_sect; + if (nb_sectors == size) { + match = i; + break; + } + if (first_match == -1) { + first_match = i; + } + } + } + if (match == -1) { + if (first_match == -1) { + match = 1; + } else { + match = first_match; + } + parse = &fd_formats[match]; + } + *nb_heads = parse->max_head + 1; + *max_track = parse->max_track; + *last_sect = parse->last_sect; + *drive = parse->drive; + *rate = parse->rate; +} + #define GET_CUR_DRV(fdctrl) ((fdctrl)->cur_drv) #define SET_CUR_DRV(fdctrl, drive) ((fdctrl)->cur_drv = (drive)) @@ -62,12 +167,15 @@ #define FD_SECTOR_SC 2 /* Sector size code */ #define FD_RESET_SENSEI_COUNT 4 /* Number of sense interrupts on RESET */ +typedef struct FDCtrl FDCtrl; + /* Floppy disk drive emulation */ typedef enum FDiskFlags { FDISK_DBL_SIDES = 0x01, } FDiskFlags; typedef struct FDrive { + FDCtrl *fdctrl; BlockDriverState *bs; /* Drive status */ FDriveType drive; @@ -83,6 +191,7 @@ typedef struct FDrive { uint16_t bps; /* Bytes per sector */ uint8_t ro; /* Is read-only */ uint8_t media_changed; /* Is media changed */ + uint8_t media_rate; /* Data rate of medium */ } FDrive; static void fd_init(FDrive *drv) @@ -95,16 +204,19 @@ static void fd_init(FDrive *drv) drv->max_track = 0; } +#define NUM_SIDES(drv) ((drv)->flags & FDISK_DBL_SIDES ? 2 : 1) + static int fd_sector_calc(uint8_t head, uint8_t track, uint8_t sect, - uint8_t last_sect) + uint8_t last_sect, uint8_t num_sides) { - return (((track * 2) + head) * last_sect) + sect - 1; + return (((track * num_sides) + head) * last_sect) + sect - 1; } /* Returns current position, in sectors, for given drive */ static int fd_sector(FDrive *drv) { - return fd_sector_calc(drv->head, drv->track, drv->sect, drv->last_sect); + return fd_sector_calc(drv->head, drv->track, drv->sect, drv->last_sect, + NUM_SIDES(drv)); } /* Seek to a new position: @@ -135,23 +247,33 @@ static int fd_seek(FDrive *drv, uint8_t head, uint8_t track, uint8_t sect, drv->max_track, drv->last_sect); return 3; } - sector = fd_sector_calc(head, track, sect, drv->last_sect); + sector = fd_sector_calc(head, track, sect, drv->last_sect, NUM_SIDES(drv)); ret = 0; if (sector != fd_sector(drv)) { #if 0 if (!enable_seek) { - FLOPPY_ERROR("no implicit seek %d %02x %02x (max=%d %02x %02x)\n", - head, track, sect, 1, drv->max_track, drv->last_sect); + FLOPPY_DPRINTF("error: no implicit seek %d %02x %02x" + " (max=%d %02x %02x)\n", + head, track, sect, 1, drv->max_track, + drv->last_sect); return 4; } #endif drv->head = head; - if (drv->track != track) + if (drv->track != track) { + if (drv->bs != NULL && bdrv_is_inserted(drv->bs)) { + drv->media_changed = 0; + } ret = 1; + } drv->track = track; drv->sect = sect; } + if (drv->bs == NULL || !bdrv_is_inserted(drv->bs)) { + ret = 2; + } + return ret; } @@ -159,9 +281,7 @@ static int fd_seek(FDrive *drv, uint8_t head, uint8_t track, uint8_t sect, static void fd_recalibrate(FDrive *drv) { FLOPPY_DPRINTF("recalibrate\n"); - drv->head = 0; - drv->track = 0; - drv->sect = 1; + fd_seek(drv, 0, 0, 1, 1); } /* Revalidate a disk drive after a disk change */ @@ -169,15 +289,15 @@ static void fd_revalidate(FDrive *drv) { int nb_heads, max_track, last_sect, ro; FDriveType drive; + FDriveRate rate; FLOPPY_DPRINTF("revalidate\n"); - if (drv->bs != NULL && bdrv_is_inserted(drv->bs)) { + if (drv->bs != NULL) { ro = bdrv_is_read_only(drv->bs); - bdrv_get_floppy_geometry_hint(drv->bs, &nb_heads, &max_track, - &last_sect, drv->drive, &drive); - 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); + pick_geometry(drv->bs, &nb_heads, &max_track, + &last_sect, drv->drive, &drive, &rate); + if (!bdrv_is_inserted(drv->bs)) { + FLOPPY_DPRINTF("No disk in drive\n"); } else { FLOPPY_DPRINTF("Floppy disk (%d h %d t %d s) %s\n", nb_heads, max_track, last_sect, ro ? "ro" : "rw"); @@ -191,8 +311,9 @@ static void fd_revalidate(FDrive *drv) drv->last_sect = last_sect; drv->ro = ro; drv->drive = drive; + drv->media_rate = rate; } else { - FLOPPY_DPRINTF("No disk in drive\n"); + FLOPPY_DPRINTF("No drive connected\n"); drv->last_sect = 0; drv->max_track = 0; drv->flags &= ~FDISK_DBL_SIDES; @@ -202,13 +323,12 @@ static void fd_revalidate(FDrive *drv) /********************************************************/ /* Intel 82078 floppy disk controller emulation */ -typedef struct FDCtrl FDCtrl; - static void fdctrl_reset(FDCtrl *fdctrl, int do_irq); static void fdctrl_reset_fifo(FDCtrl *fdctrl); static int fdctrl_transfer_handler (void *opaque, int nchan, int dma_pos, int dma_len); static void fdctrl_raise_irq(FDCtrl *fdctrl, uint8_t status0); +static FDrive *get_cur_drv(FDCtrl *fdctrl); static uint32_t fdctrl_read_statusA(FDCtrl *fdctrl); static uint32_t fdctrl_read_statusB(FDCtrl *fdctrl); @@ -221,6 +341,7 @@ static void fdctrl_write_rate(FDCtrl *fdctrl, uint32_t value); static uint32_t fdctrl_read_data(FDCtrl *fdctrl); static void fdctrl_write_data(FDCtrl *fdctrl, uint32_t value); static uint32_t fdctrl_read_dir(FDCtrl *fdctrl); +static void fdctrl_write_ccr(FDCtrl *fdctrl, uint32_t value); enum { FD_DIR_WRITE = 0, @@ -245,6 +366,7 @@ enum { FD_REG_DSR = 0x04, FD_REG_FIFO = 0x05, FD_REG_DIR = 0x07, + FD_REG_CCR = 0x07, }; enum { @@ -289,6 +411,9 @@ enum { }; enum { + FD_SR0_DS0 = 0x01, + FD_SR0_DS1 = 0x02, + FD_SR0_HEAD = 0x04, FD_SR0_EQPMT = 0x10, FD_SR0_SEEK = 0x20, FD_SR0_ABNTERM = 0x40, @@ -297,6 +422,8 @@ enum { }; enum { + FD_SR1_MA = 0x01, /* Missing address mark */ + FD_SR1_NW = 0x02, /* Not writable */ FD_SR1_EC = 0x80, /* End of cylinder */ }; @@ -413,6 +540,7 @@ struct FDCtrl { int sun4m; FDrive drives[MAX_FD]; int reset_sensei; + uint32_t check_media_rate; /* Timers state */ uint8_t timer0; uint8_t timer1; @@ -425,6 +553,9 @@ typedef struct FDCtrlSysBus { typedef struct FDCtrlISABus { ISADevice busdev; + uint32_t iobase; + uint32_t irq; + uint32_t dma; struct FDCtrl state; int32_t bootindexA; int32_t bootindexB; @@ -487,18 +618,21 @@ static void fdctrl_write (void *opaque, uint32_t reg, uint32_t value) case FD_REG_FIFO: fdctrl_write_data(fdctrl, value); break; + case FD_REG_CCR: + fdctrl_write_ccr(fdctrl, value); + break; default: break; } } -static uint64_t fdctrl_read_mem (void *opaque, target_phys_addr_t reg, +static uint64_t fdctrl_read_mem (void *opaque, hwaddr reg, unsigned ize) { return fdctrl_read(opaque, (uint32_t)reg); } -static void fdctrl_write_mem (void *opaque, target_phys_addr_t reg, +static void fdctrl_write_mem (void *opaque, hwaddr reg, uint64_t value, unsigned size) { fdctrl_write(opaque, (uint32_t)reg, value); @@ -538,6 +672,24 @@ static const VMStateDescription vmstate_fdrive_media_changed = { } }; +static bool fdrive_media_rate_needed(void *opaque) +{ + FDrive *drive = opaque; + + return drive->fdctrl->check_media_rate; +} + +static const VMStateDescription vmstate_fdrive_media_rate = { + .name = "fdrive/media_rate", + .version_id = 1, + .minimum_version_id = 1, + .minimum_version_id_old = 1, + .fields = (VMStateField[]) { + VMSTATE_UINT8(media_rate, FDrive), + VMSTATE_END_OF_LIST() + } +}; + static const VMStateDescription vmstate_fdrive = { .name = "fdrive", .version_id = 1, @@ -553,6 +705,9 @@ static const VMStateDescription vmstate_fdrive = { { .vmsd = &vmstate_fdrive_media_changed, .needed = &fdrive_media_changed_needed, + } , { + .vmsd = &vmstate_fdrive_media_rate, + .needed = &fdrive_media_rate_needed, } , { /* empty */ } @@ -665,6 +820,7 @@ static void fdctrl_raise_irq(FDCtrl *fdctrl, uint8_t status0) qemu_set_irq(fdctrl->irq, 1); fdctrl->sra |= FD_SRA_INTPEND; } + fdctrl->reset_sensei = 0; fdctrl->status0 = status0; FLOPPY_DPRINTF("Set interrupt status to 0x%02x\n", fdctrl->status0); @@ -877,25 +1033,26 @@ static void fdctrl_write_rate(FDCtrl *fdctrl, uint32_t value) fdctrl->dsr = value; } -static int fdctrl_media_changed(FDrive *drv) +/* Configuration control register: 0x07 (write) */ +static void fdctrl_write_ccr(FDCtrl *fdctrl, uint32_t value) { - int ret; - - if (!drv->bs) - return 0; - if (drv->media_changed) { - drv->media_changed = 0; - ret = 1; - } else { - ret = bdrv_media_changed(drv->bs); - if (ret < 0) { - ret = 0; /* we don't know, assume no */ - } - } - if (ret) { - fd_revalidate(drv); + /* Reset mode */ + if (!(fdctrl->dor & FD_DOR_nRESET)) { + FLOPPY_DPRINTF("Floppy controller in RESET state !\n"); + return; } - return ret; + FLOPPY_DPRINTF("configuration control register set to 0x%02x\n", value); + + /* Only the rate selection bits used in AT mode, and we + * store those in the DSR. + */ + fdctrl->dsr = (fdctrl->dsr & ~FD_DSR_DRATEMASK) | + (value & FD_DSR_DRATEMASK); +} + +static int fdctrl_media_changed(FDrive *drv) +{ + return drv->media_changed; } /* Digital input register : 0x07 (read-only) */ @@ -903,14 +1060,9 @@ static uint32_t fdctrl_read_dir(FDCtrl *fdctrl) { uint32_t retval = 0; - if (fdctrl_media_changed(drv0(fdctrl)) - || fdctrl_media_changed(drv1(fdctrl)) -#if MAX_FD == 4 - || fdctrl_media_changed(drv2(fdctrl)) - || fdctrl_media_changed(drv3(fdctrl)) -#endif - ) + if (fdctrl_media_changed(get_cur_drv(fdctrl))) { retval |= FD_DIR_DSKCHG; + } if (retval != 0) { FLOPPY_DPRINTF("Floppy digital input register: 0x%02x\n", retval); } @@ -927,25 +1079,30 @@ static void fdctrl_reset_fifo(FDCtrl *fdctrl) } /* Set FIFO status for the host to read */ -static void fdctrl_set_fifo(FDCtrl *fdctrl, int fifo_len, int do_irq) +static void fdctrl_set_fifo(FDCtrl *fdctrl, int fifo_len, uint8_t status0) { fdctrl->data_dir = FD_DIR_READ; fdctrl->data_len = fifo_len; fdctrl->data_pos = 0; fdctrl->msr |= FD_MSR_CMDBUSY | FD_MSR_RQM | FD_MSR_DIO; - if (do_irq) - fdctrl_raise_irq(fdctrl, 0x00); + if (status0) { + fdctrl_raise_irq(fdctrl, status0); + } } /* Set an error: unimplemented/unknown command */ static void fdctrl_unimplemented(FDCtrl *fdctrl, int direction) { - FLOPPY_ERROR("unimplemented command 0x%02x\n", fdctrl->fifo[0]); + qemu_log_mask(LOG_UNIMP, "fdc: unimplemented command 0x%02x\n", + fdctrl->fifo[0]); fdctrl->fifo[0] = FD_SR0_INVCMD; fdctrl_set_fifo(fdctrl, 1, 0); } -/* Seek to next sector */ +/* Seek to next sector + * returns 0 when end of track reached (for DBL_SIDES on head 1) + * otherwise returns 1 + */ static int fdctrl_seek_to_next_sect(FDCtrl *fdctrl, FDrive *cur_drv) { FLOPPY_DPRINTF("seek to next sector (%d %02x %02x => %d)\n", @@ -953,30 +1110,39 @@ static int fdctrl_seek_to_next_sect(FDCtrl *fdctrl, FDrive *cur_drv) fd_sector(cur_drv)); /* 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; + uint8_t new_head = cur_drv->head; + uint8_t new_track = cur_drv->track; + uint8_t new_sect = cur_drv->sect; + + int ret = 1; + + if (new_sect >= cur_drv->last_sect || + new_sect == fdctrl->eot) { + new_sect = 1; if (FD_MULTI_TRACK(fdctrl->data_state)) { - if (cur_drv->head == 0 && + if (new_head == 0 && (cur_drv->flags & FDISK_DBL_SIDES) != 0) { - cur_drv->head = 1; + new_head = 1; } else { - cur_drv->head = 0; - cur_drv->track++; - if ((cur_drv->flags & FDISK_DBL_SIDES) == 0) - return 0; + new_head = 0; + new_track++; + if ((cur_drv->flags & FDISK_DBL_SIDES) == 0) { + ret = 0; + } } } else { - cur_drv->track++; - return 0; + new_track++; + ret = 0; + } + if (ret == 1) { + FLOPPY_DPRINTF("seek to next track (%d %02x %02x => %d)\n", + new_head, new_track, new_sect, fd_sector(cur_drv)); } - 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++; + new_sect++; } - return 1; + fd_seek(cur_drv, new_head, new_track, new_sect, 1); + return ret; } /* Callback for transfer end (stop or abort) */ @@ -986,10 +1152,12 @@ static void fdctrl_stop_transfer(FDCtrl *fdctrl, uint8_t status0, FDrive *cur_drv; cur_drv = get_cur_drv(fdctrl); + fdctrl->status0 = status0 | FD_SR0_SEEK | (cur_drv->head << 2) | + GET_CUR_DRV(fdctrl); + FLOPPY_DPRINTF("transfer status: %02x %02x %02x (%02x)\n", - status0, status1, status2, - status0 | (cur_drv->head << 2) | GET_CUR_DRV(fdctrl)); - fdctrl->fifo[0] = status0 | (cur_drv->head << 2) | GET_CUR_DRV(fdctrl); + status0, status1, status2, fdctrl->status0); + fdctrl->fifo[0] = fdctrl->status0; fdctrl->fifo[1] = status1; fdctrl->fifo[2] = status2; fdctrl->fifo[3] = cur_drv->track; @@ -1002,7 +1170,7 @@ static void fdctrl_stop_transfer(FDCtrl *fdctrl, uint8_t status0, } fdctrl->msr |= FD_MSR_RQM | FD_MSR_DIO; fdctrl->msr &= ~FD_MSR_NONDMA; - fdctrl_set_fifo(fdctrl, 7, 1); + fdctrl_set_fifo(fdctrl, 7, fdctrl->status0); } /* Prepare a data transfer (either DMA or FIFO) */ @@ -1019,7 +1187,8 @@ static void fdctrl_start_transfer(FDCtrl *fdctrl, int direction) ks = fdctrl->fifo[4]; FLOPPY_DPRINTF("Start transfer at %d %d %02x %02x (%d)\n", GET_CUR_DRV(fdctrl), kh, kt, ks, - fd_sector_calc(kh, kt, ks, cur_drv->last_sect)); + fd_sector_calc(kh, kt, ks, cur_drv->last_sect, + NUM_SIDES(cur_drv))); switch (fd_seek(cur_drv, kh, kt, ks, fdctrl->config & FD_CONFIG_EIS)) { case 2: /* sect too big */ @@ -1049,6 +1218,19 @@ static void fdctrl_start_transfer(FDCtrl *fdctrl, int direction) break; } + /* Check the data rate. If the programmed data rate does not match + * the currently inserted medium, the operation has to fail. */ + if (fdctrl->check_media_rate && + (fdctrl->dsr & FD_DSR_DRATEMASK) != cur_drv->media_rate) { + FLOPPY_DPRINTF("data rate mismatch (fdc=%d, media=%d)\n", + fdctrl->dsr & FD_DSR_DRATEMASK, cur_drv->media_rate); + fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, FD_SR1_MA, 0x00); + fdctrl->fifo[3] = kt; + fdctrl->fifo[4] = kh; + fdctrl->fifo[5] = ks; + return; + } + /* Set the FIFO state */ fdctrl->data_dir = direction; fdctrl->data_pos = 0; @@ -1094,7 +1276,8 @@ static void fdctrl_start_transfer(FDCtrl *fdctrl, int direction) DMA_schedule(fdctrl->dma_chann); return; } else { - FLOPPY_ERROR("dma_mode=%d direction=%d\n", dma_mode, direction); + FLOPPY_DPRINTF("bad dma_mode=%d direction=%d\n", dma_mode, + direction); } } FLOPPY_DPRINTF("start non-DMA transfer\n"); @@ -1102,15 +1285,13 @@ static void fdctrl_start_transfer(FDCtrl *fdctrl, int direction) if (direction != FD_DIR_WRITE) fdctrl->msr |= FD_MSR_DIO; /* IO based transfer: calculate len */ - fdctrl_raise_irq(fdctrl, 0x00); - - return; + fdctrl_raise_irq(fdctrl, FD_SR0_SEEK); } /* Prepare a transfer of deleted data */ static void fdctrl_start_transfer_del(FDCtrl *fdctrl, int direction) { - FLOPPY_ERROR("fdctrl_start_transfer_del() unimplemented\n"); + qemu_log_mask(LOG_UNIMP, "fdctrl_start_transfer_del() unimplemented\n"); /* We don't handle deleted data, * so we don't return *ANYTHING* @@ -1175,11 +1356,22 @@ static int fdctrl_transfer_handler (void *opaque, int nchan, break; case FD_DIR_WRITE: /* WRITE commands */ + if (cur_drv->ro) { + /* Handle readonly medium early, no need to do DMA, touch the + * LED or attempt any writes. A real floppy doesn't attempt + * to write to readonly media either. */ + fdctrl_stop_transfer(fdctrl, + FD_SR0_ABNTERM | FD_SR0_SEEK, FD_SR1_NW, + 0x00); + goto transfer_error; + } + DMA_read_memory (nchan, fdctrl->fifo + rel_pos, fdctrl->data_pos, len); if (bdrv_write(cur_drv->bs, fd_sector(cur_drv), fdctrl->fifo, 1) < 0) { - FLOPPY_ERROR("writing sector %d\n", fd_sector(cur_drv)); + FLOPPY_DPRINTF("error writing sector %d\n", + fd_sector(cur_drv)); fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM | FD_SR0_SEEK, 0x00, 0x00); goto transfer_error; } @@ -1238,7 +1430,7 @@ static uint32_t fdctrl_read_data(FDCtrl *fdctrl) cur_drv = get_cur_drv(fdctrl); fdctrl->dsr &= ~FD_DSR_PWRDOWN; if (!(fdctrl->msr & FD_MSR_RQM) || !(fdctrl->msr & FD_MSR_DIO)) { - FLOPPY_ERROR("controller not ready for reading\n"); + FLOPPY_DPRINTF("error: controller not ready for reading\n"); return 0; } pos = fdctrl->data_pos; @@ -1289,7 +1481,8 @@ static void fdctrl_format_sector(FDCtrl *fdctrl) ks = fdctrl->fifo[8]; FLOPPY_DPRINTF("format sector at %d %d %02x %02x (%d)\n", GET_CUR_DRV(fdctrl), kh, kt, ks, - fd_sector_calc(kh, kt, ks, cur_drv->last_sect)); + fd_sector_calc(kh, kt, ks, cur_drv->last_sect, + NUM_SIDES(cur_drv))); switch (fd_seek(cur_drv, kh, kt, ks, fdctrl->config & FD_CONFIG_EIS)) { case 2: /* sect too big */ @@ -1321,7 +1514,7 @@ static void fdctrl_format_sector(FDCtrl *fdctrl) 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)); + FLOPPY_DPRINTF("error formatting sector %d\n", fd_sector(cur_drv)); fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM | FD_SR0_SEEK, 0x00, 0x00); } else { if (cur_drv->sect == cur_drv->last_sect) { @@ -1343,7 +1536,7 @@ static void fdctrl_handle_lock(FDCtrl *fdctrl, int direction) { fdctrl->lock = (fdctrl->fifo[0] & 0x80) ? 1 : 0; fdctrl->fifo[0] = fdctrl->lock << 4; - fdctrl_set_fifo(fdctrl, 1, fdctrl->lock); + fdctrl_set_fifo(fdctrl, 1, 0); } static void fdctrl_handle_dumpreg(FDCtrl *fdctrl, int direction) @@ -1375,7 +1568,7 @@ static void fdctrl_handle_version(FDCtrl *fdctrl, int direction) { /* Controller's version */ fdctrl->fifo[0] = fdctrl->version; - fdctrl_set_fifo(fdctrl, 1, 1); + fdctrl_set_fifo(fdctrl, 1, 0); } static void fdctrl_handle_partid(FDCtrl *fdctrl, int direction) @@ -1434,14 +1627,13 @@ static void fdctrl_handle_save(FDCtrl *fdctrl, int direction) fdctrl->fifo[12] = fdctrl->pwrd; fdctrl->fifo[13] = 0; fdctrl->fifo[14] = 0; - fdctrl_set_fifo(fdctrl, 15, 1); + fdctrl_set_fifo(fdctrl, 15, 0); } static void fdctrl_handle_readid(FDCtrl *fdctrl, int direction) { FDrive *cur_drv = get_cur_drv(fdctrl); - /* 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_ns(vm_clock) + (get_ticks_per_sec() / 50)); @@ -1520,16 +1712,18 @@ static void fdctrl_handle_sense_interrupt_status(FDCtrl *fdctrl, int direction) { FDrive *cur_drv = get_cur_drv(fdctrl); - if(fdctrl->reset_sensei > 0) { + if (fdctrl->reset_sensei > 0) { fdctrl->fifo[0] = FD_SR0_RDYCHG + FD_RESET_SENSEI_COUNT - fdctrl->reset_sensei; fdctrl->reset_sensei--; + } else if (!(fdctrl->sra & FD_SRA_INTPEND)) { + fdctrl->fifo[0] = FD_SR0_INVCMD; + fdctrl_set_fifo(fdctrl, 1, 0); + return; } else { - /* XXX: status0 handling is broken for read/write - commands, so we do this hack. It should be suppressed - ASAP */ fdctrl->fifo[0] = - FD_SR0_SEEK | (cur_drv->head << 2) | GET_CUR_DRV(fdctrl); + (fdctrl->status0 & ~(FD_SR0_HEAD | FD_SR0_DS1 | FD_SR0_DS0)) + | GET_CUR_DRV(fdctrl); } fdctrl->fifo[1] = cur_drv->track; @@ -1545,13 +1739,12 @@ static void fdctrl_handle_seek(FDCtrl *fdctrl, int direction) SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK); cur_drv = get_cur_drv(fdctrl); fdctrl_reset_fifo(fdctrl); - if (fdctrl->fifo[2] > cur_drv->max_track) { - fdctrl_raise_irq(fdctrl, FD_SR0_ABNTERM | FD_SR0_SEEK); - } else { - cur_drv->track = fdctrl->fifo[2]; - /* Raise Interrupt */ - fdctrl_raise_irq(fdctrl, FD_SR0_SEEK); - } + /* The seek command just sends step pulses to the drive and doesn't care if + * there is a medium inserted of if it's banging the head against the drive. + */ + fd_seek(cur_drv, cur_drv->head, fdctrl->fifo[2], cur_drv->sect, 1); + /* Raise Interrupt */ + fdctrl_raise_irq(fdctrl, FD_SR0_SEEK); } static void fdctrl_handle_perpendicular_mode(FDCtrl *fdctrl, int direction) @@ -1576,7 +1769,7 @@ static void fdctrl_handle_powerdown_mode(FDCtrl *fdctrl, int direction) { fdctrl->pwrd = fdctrl->fifo[1]; fdctrl->fifo[0] = fdctrl->fifo[1]; - fdctrl_set_fifo(fdctrl, 1, 1); + fdctrl_set_fifo(fdctrl, 1, 0); } static void fdctrl_handle_option(FDCtrl *fdctrl, int direction) @@ -1595,7 +1788,7 @@ static void fdctrl_handle_drive_specification_command(FDCtrl *fdctrl, int direct fdctrl->fifo[0] = fdctrl->fifo[1]; fdctrl->fifo[2] = 0; fdctrl->fifo[3] = 0; - fdctrl_set_fifo(fdctrl, 4, 1); + fdctrl_set_fifo(fdctrl, 4, 0); } else { fdctrl_reset_fifo(fdctrl); } @@ -1603,36 +1796,39 @@ static void fdctrl_handle_drive_specification_command(FDCtrl *fdctrl, int direct /* ERROR */ fdctrl->fifo[0] = 0x80 | (cur_drv->head << 2) | GET_CUR_DRV(fdctrl); - fdctrl_set_fifo(fdctrl, 1, 1); + fdctrl_set_fifo(fdctrl, 1, 0); } } -static void fdctrl_handle_relative_seek_out(FDCtrl *fdctrl, int direction) +static void fdctrl_handle_relative_seek_in(FDCtrl *fdctrl, int direction) { FDrive *cur_drv; SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK); cur_drv = get_cur_drv(fdctrl); if (fdctrl->fifo[2] + cur_drv->track >= cur_drv->max_track) { - cur_drv->track = cur_drv->max_track - 1; + fd_seek(cur_drv, cur_drv->head, cur_drv->max_track - 1, + cur_drv->sect, 1); } else { - cur_drv->track += fdctrl->fifo[2]; + fd_seek(cur_drv, cur_drv->head, + cur_drv->track + fdctrl->fifo[2], cur_drv->sect, 1); } fdctrl_reset_fifo(fdctrl); /* Raise Interrupt */ fdctrl_raise_irq(fdctrl, FD_SR0_SEEK); } -static void fdctrl_handle_relative_seek_in(FDCtrl *fdctrl, int direction) +static void fdctrl_handle_relative_seek_out(FDCtrl *fdctrl, int direction) { FDrive *cur_drv; SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK); cur_drv = get_cur_drv(fdctrl); if (fdctrl->fifo[2] > cur_drv->track) { - cur_drv->track = 0; + fd_seek(cur_drv, cur_drv->head, 0, cur_drv->sect, 1); } else { - cur_drv->track -= fdctrl->fifo[2]; + fd_seek(cur_drv, cur_drv->head, + cur_drv->track - fdctrl->fifo[2], cur_drv->sect, 1); } fdctrl_reset_fifo(fdctrl); /* Raise Interrupt */ @@ -1694,7 +1890,7 @@ static void fdctrl_write_data(FDCtrl *fdctrl, uint32_t value) return; } if (!(fdctrl->msr & FD_MSR_RQM) || (fdctrl->msr & FD_MSR_DIO)) { - FLOPPY_ERROR("controller not ready for writing\n"); + FLOPPY_DPRINTF("error: controller not ready for writing\n"); return; } fdctrl->dsr &= ~FD_DSR_PWRDOWN; @@ -1708,7 +1904,8 @@ static void fdctrl_write_data(FDCtrl *fdctrl, uint32_t value) fdctrl->data_pos == fdctrl->data_len) { cur_drv = get_cur_drv(fdctrl); if (bdrv_write(cur_drv->bs, fd_sector(cur_drv), fdctrl->fifo, 1) < 0) { - FLOPPY_ERROR("writing sector %d\n", fd_sector(cur_drv)); + FLOPPY_DPRINTF("error writing sector %d\n", + fd_sector(cur_drv)); return; } if (!fdctrl_seek_to_next_sect(fdctrl, cur_drv)) { @@ -1729,6 +1926,7 @@ static void fdctrl_write_data(FDCtrl *fdctrl, uint32_t value) pos = command_to_handler[value & 0xff]; FLOPPY_DPRINTF("%s command\n", handlers[pos].name); fdctrl->data_len = handlers[pos].parameters + 1; + fdctrl->msr |= FD_MSR_CMDBUSY; } FLOPPY_DPRINTF("%s: %02x\n", __func__, value); @@ -1760,7 +1958,15 @@ static void fdctrl_result_timer(void *opaque) if (cur_drv->last_sect != 0) { cur_drv->sect = (cur_drv->sect % cur_drv->last_sect) + 1; } - fdctrl_stop_transfer(fdctrl, 0x00, 0x00, 0x00); + /* READ_ID can't automatically succeed! */ + if (fdctrl->check_media_rate && + (fdctrl->dsr & FD_DSR_DRATEMASK) != cur_drv->media_rate) { + FLOPPY_DPRINTF("read id rate mismatch (fdc=%d, media=%d)\n", + fdctrl->dsr & FD_DSR_DRATEMASK, cur_drv->media_rate); + fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, FD_SR1_MA, 0x00); + } else { + fdctrl_stop_transfer(fdctrl, 0x00, 0x00, 0x00); + } } static void fdctrl_change_cb(void *opaque, bool load) @@ -1768,6 +1974,7 @@ static void fdctrl_change_cb(void *opaque, bool load) FDrive *drive = opaque; drive->media_changed = 1; + fd_revalidate(drive); } static const BlockDevOps fdctrl_block_ops = { @@ -1782,30 +1989,50 @@ static int fdctrl_connect_drives(FDCtrl *fdctrl) for (i = 0; i < MAX_FD; i++) { drive = &fdctrl->drives[i]; + drive->fdctrl = fdctrl; if (drive->bs) { - if (bdrv_get_on_error(drive->bs, 0) != BLOCK_ERR_STOP_ENOSPC) { + if (bdrv_get_on_error(drive->bs, 0) != BLOCKDEV_ON_ERROR_ENOSPC) { error_report("fdc doesn't support drive option werror"); return -1; } - if (bdrv_get_on_error(drive->bs, 1) != BLOCK_ERR_REPORT) { + if (bdrv_get_on_error(drive->bs, 1) != BLOCKDEV_ON_ERROR_REPORT) { error_report("fdc doesn't support drive option rerror"); return -1; } } fd_init(drive); - fd_revalidate(drive); + fdctrl_change_cb(drive, 0); if (drive->bs) { - drive->media_changed = 1; bdrv_set_dev_ops(drive->bs, &fdctrl_block_ops, drive); } } return 0; } +ISADevice *fdctrl_init_isa(ISABus *bus, DriveInfo **fds) +{ + ISADevice *dev; + + dev = isa_try_create(bus, "isa-fdc"); + if (!dev) { + return NULL; + } + + if (fds[0]) { + qdev_prop_set_drive_nofail(&dev->qdev, "driveA", fds[0]->bdrv); + } + if (fds[1]) { + qdev_prop_set_drive_nofail(&dev->qdev, "driveB", fds[1]->bdrv); + } + qdev_init_nofail(&dev->qdev); + + return dev; +} + void fdctrl_init_sysbus(qemu_irq irq, int dma_chann, - target_phys_addr_t mmio_base, DriveInfo **fds) + hwaddr mmio_base, DriveInfo **fds) { FDCtrl *fdctrl; DeviceState *dev; @@ -1826,7 +2053,7 @@ void fdctrl_init_sysbus(qemu_irq irq, int dma_chann, sysbus_mmio_map(&sys->busdev, 0, mmio_base); } -void sun4m_fdctrl_init(qemu_irq irq, target_phys_addr_t io_base, +void sun4m_fdctrl_init(qemu_irq irq, hwaddr io_base, DriveInfo **fds, qemu_irq *fdc_tc) { DeviceState *dev; @@ -1885,17 +2112,14 @@ static int isabus_fdc_init1(ISADevice *dev) { FDCtrlISABus *isa = DO_UPCAST(FDCtrlISABus, busdev, dev); FDCtrl *fdctrl = &isa->state; - int iobase = 0x3f0; - int isairq = 6; - int dma_chann = 2; int ret; - isa_register_portio_list(dev, iobase, fdc_portio_list, fdctrl, "fdc"); + isa_register_portio_list(dev, isa->iobase, fdc_portio_list, fdctrl, "fdc"); - isa_init_irq(&isa->busdev, &fdctrl->irq, isairq); - fdctrl->dma_chann = dma_chann; + isa_init_irq(&isa->busdev, &fdctrl->irq, isa->irq); + fdctrl->dma_chann = isa->dma; - qdev_set_legacy_instance_id(&dev->qdev, iobase, 2); + qdev_set_legacy_instance_id(&dev->qdev, isa->iobase, 2); ret = fdctrl_init_common(fdctrl); add_boot_device_path(isa->bootindexA, &dev->qdev, "/floppy@0"); @@ -1937,18 +2161,13 @@ static int sun4m_fdc_init1(SysBusDevice *dev) return fdctrl_init_common(fdctrl); } -void fdc_get_bs(BlockDriverState *bs[], ISADevice *dev) +FDriveType isa_fdc_get_drive_type(ISADevice *fdc, int i) { - FDCtrlISABus *isa = DO_UPCAST(FDCtrlISABus, busdev, dev); - FDCtrl *fdctrl = &isa->state; - int i; + FDCtrlISABus *isa = DO_UPCAST(FDCtrlISABus, busdev, fdc); - for (i = 0; i < MAX_FD; i++) { - bs[i] = fdctrl->drives[i].bs; - } + return isa->state.drives[i].drive; } - static const VMStateDescription vmstate_isa_fdc ={ .name = "fdc", .version_id = 2, @@ -1960,10 +2179,15 @@ static const VMStateDescription vmstate_isa_fdc ={ }; static Property isa_fdc_properties[] = { + DEFINE_PROP_HEX32("iobase", FDCtrlISABus, iobase, 0x3f0), + DEFINE_PROP_UINT32("irq", FDCtrlISABus, irq, 6), + DEFINE_PROP_UINT32("dma", FDCtrlISABus, dma, 2), DEFINE_PROP_DRIVE("driveA", FDCtrlISABus, state.drives[0].bs), DEFINE_PROP_DRIVE("driveB", FDCtrlISABus, state.drives[1].bs), DEFINE_PROP_INT32("bootindexA", FDCtrlISABus, bootindexA, -1), DEFINE_PROP_INT32("bootindexB", FDCtrlISABus, bootindexB, -1), + DEFINE_PROP_BIT("check_media_rate", FDCtrlISABus, state.check_media_rate, + 0, true), DEFINE_PROP_END_OF_LIST(), };