diff options
Diffstat (limited to 'hw/fdc.c')
| -rw-r--r-- | hw/fdc.c | 2284 |
1 files changed, 0 insertions, 2284 deletions
diff --git a/hw/fdc.c b/hw/fdc.c deleted file mode 100644 index a4bb1290ef..0000000000 --- a/hw/fdc.c +++ /dev/null @@ -1,2284 +0,0 @@ -/* - * QEMU Floppy disk emulator (Intel 82078) - * - * Copyright (c) 2003, 2007 Jocelyn Mayer - * Copyright (c) 2008 Hervé Poussineau - * - * Permission is hereby granted, free of charge, to any person obtaining a copy - * of this software and associated documentation files (the "Software"), to deal - * in the Software without restriction, including without limitation the rights - * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell - * copies of the Software, and to permit persons to whom the Software is - * furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included in - * all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, - * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN - * THE SOFTWARE. - */ -/* - * The controller is used in Sun4m systems in a slightly different - * way. There are changes in DOR register and DMA is not available. - */ - -#include "hw/hw.h" -#include "hw/fdc.h" -#include "qemu/error-report.h" -#include "qemu/timer.h" -#include "hw/isa.h" -#include "hw/sysbus.h" -#include "hw/qdev-addr.h" -#include "sysemu/blockdev.h" -#include "sysemu/sysemu.h" -#include "qemu/log.h" - -/********************************************************/ -/* debug Floppy devices */ -//#define DEBUG_FLOPPY - -#ifdef DEBUG_FLOPPY -#define FLOPPY_DPRINTF(fmt, ...) \ - do { printf("FLOPPY: " fmt , ## __VA_ARGS__); } while (0) -#else -#define FLOPPY_DPRINTF(fmt, ...) -#endif - -/********************************************************/ -/* Floppy drive emulation */ - -typedef enum FDriveRate { - FDRIVE_RATE_500K = 0x00, /* 500 Kbps */ - FDRIVE_RATE_300K = 0x01, /* 300 Kbps */ - FDRIVE_RATE_250K = 0x02, /* 250 Kbps */ - FDRIVE_RATE_1M = 0x03, /* 1 Mbps */ -} FDriveRate; - -typedef struct FDFormat { - FDriveType drive; - uint8_t last_sect; - uint8_t max_track; - uint8_t max_head; - FDriveRate rate; -} FDFormat; - -static const FDFormat fd_formats[] = { - /* First entry is default format */ - /* 1.44 MB 3"1/2 floppy disks */ - { FDRIVE_DRV_144, 18, 80, 1, FDRIVE_RATE_500K, }, - { FDRIVE_DRV_144, 20, 80, 1, FDRIVE_RATE_500K, }, - { FDRIVE_DRV_144, 21, 80, 1, FDRIVE_RATE_500K, }, - { FDRIVE_DRV_144, 21, 82, 1, FDRIVE_RATE_500K, }, - { FDRIVE_DRV_144, 21, 83, 1, FDRIVE_RATE_500K, }, - { FDRIVE_DRV_144, 22, 80, 1, FDRIVE_RATE_500K, }, - { FDRIVE_DRV_144, 23, 80, 1, FDRIVE_RATE_500K, }, - { FDRIVE_DRV_144, 24, 80, 1, FDRIVE_RATE_500K, }, - /* 2.88 MB 3"1/2 floppy disks */ - { FDRIVE_DRV_288, 36, 80, 1, FDRIVE_RATE_1M, }, - { FDRIVE_DRV_288, 39, 80, 1, FDRIVE_RATE_1M, }, - { FDRIVE_DRV_288, 40, 80, 1, FDRIVE_RATE_1M, }, - { FDRIVE_DRV_288, 44, 80, 1, FDRIVE_RATE_1M, }, - { FDRIVE_DRV_288, 48, 80, 1, FDRIVE_RATE_1M, }, - /* 720 kB 3"1/2 floppy disks */ - { FDRIVE_DRV_144, 9, 80, 1, FDRIVE_RATE_250K, }, - { FDRIVE_DRV_144, 10, 80, 1, FDRIVE_RATE_250K, }, - { FDRIVE_DRV_144, 10, 82, 1, FDRIVE_RATE_250K, }, - { FDRIVE_DRV_144, 10, 83, 1, FDRIVE_RATE_250K, }, - { FDRIVE_DRV_144, 13, 80, 1, FDRIVE_RATE_250K, }, - { FDRIVE_DRV_144, 14, 80, 1, FDRIVE_RATE_250K, }, - /* 1.2 MB 5"1/4 floppy disks */ - { FDRIVE_DRV_120, 15, 80, 1, FDRIVE_RATE_500K, }, - { FDRIVE_DRV_120, 18, 80, 1, FDRIVE_RATE_500K, }, - { FDRIVE_DRV_120, 18, 82, 1, FDRIVE_RATE_500K, }, - { FDRIVE_DRV_120, 18, 83, 1, FDRIVE_RATE_500K, }, - { FDRIVE_DRV_120, 20, 80, 1, FDRIVE_RATE_500K, }, - /* 720 kB 5"1/4 floppy disks */ - { FDRIVE_DRV_120, 9, 80, 1, FDRIVE_RATE_250K, }, - { FDRIVE_DRV_120, 11, 80, 1, FDRIVE_RATE_250K, }, - /* 360 kB 5"1/4 floppy disks */ - { FDRIVE_DRV_120, 9, 40, 1, FDRIVE_RATE_300K, }, - { FDRIVE_DRV_120, 9, 40, 0, FDRIVE_RATE_300K, }, - { FDRIVE_DRV_120, 10, 41, 1, FDRIVE_RATE_300K, }, - { FDRIVE_DRV_120, 10, 42, 1, FDRIVE_RATE_300K, }, - /* 320 kB 5"1/4 floppy disks */ - { FDRIVE_DRV_120, 8, 40, 1, FDRIVE_RATE_250K, }, - { FDRIVE_DRV_120, 8, 40, 0, FDRIVE_RATE_250K, }, - /* 360 kB must match 5"1/4 better than 3"1/2... */ - { FDRIVE_DRV_144, 9, 80, 0, FDRIVE_RATE_250K, }, - /* end */ - { FDRIVE_DRV_NONE, -1, -1, 0, 0, }, -}; - -static void pick_geometry(BlockDriverState *bs, int *nb_heads, - int *max_track, int *last_sect, - FDriveType drive_in, FDriveType *drive, - FDriveRate *rate) -{ - const FDFormat *parse; - uint64_t nb_sectors, size; - int i, first_match, match; - - bdrv_get_geometry(bs, &nb_sectors); - match = -1; - first_match = -1; - for (i = 0; ; i++) { - parse = &fd_formats[i]; - if (parse->drive == FDRIVE_DRV_NONE) { - break; - } - if (drive_in == parse->drive || - drive_in == FDRIVE_DRV_NONE) { - size = (parse->max_head + 1) * parse->max_track * - parse->last_sect; - if (nb_sectors == size) { - match = i; - break; - } - if (first_match == -1) { - first_match = i; - } - } - } - if (match == -1) { - if (first_match == -1) { - match = 1; - } else { - match = first_match; - } - parse = &fd_formats[match]; - } - *nb_heads = parse->max_head + 1; - *max_track = parse->max_track; - *last_sect = parse->last_sect; - *drive = parse->drive; - *rate = parse->rate; -} - -#define GET_CUR_DRV(fdctrl) ((fdctrl)->cur_drv) -#define SET_CUR_DRV(fdctrl, drive) ((fdctrl)->cur_drv = (drive)) - -/* Will always be a fixed parameter for us */ -#define FD_SECTOR_LEN 512 -#define FD_SECTOR_SC 2 /* Sector size code */ -#define FD_RESET_SENSEI_COUNT 4 /* Number of sense interrupts on RESET */ - -typedef struct FDCtrl FDCtrl; - -/* Floppy disk drive emulation */ -typedef enum FDiskFlags { - FDISK_DBL_SIDES = 0x01, -} FDiskFlags; - -typedef struct FDrive { - FDCtrl *fdctrl; - BlockDriverState *bs; - /* Drive status */ - FDriveType drive; - uint8_t perpendicular; /* 2.88 MB access mode */ - /* Position */ - uint8_t head; - uint8_t track; - uint8_t sect; - /* Media */ - FDiskFlags flags; - uint8_t last_sect; /* Nb sector per track */ - uint8_t max_track; /* Nb of tracks */ - uint16_t bps; /* Bytes per sector */ - uint8_t ro; /* Is read-only */ - uint8_t media_changed; /* Is media changed */ - uint8_t media_rate; /* Data rate of medium */ -} FDrive; - -static void fd_init(FDrive *drv) -{ - /* Drive */ - drv->drive = FDRIVE_DRV_NONE; - drv->perpendicular = 0; - /* Disk */ - drv->last_sect = 0; - drv->max_track = 0; -} - -#define NUM_SIDES(drv) ((drv)->flags & FDISK_DBL_SIDES ? 2 : 1) - -static int fd_sector_calc(uint8_t head, uint8_t track, uint8_t sect, - uint8_t last_sect, uint8_t num_sides) -{ - return (((track * num_sides) + head) * last_sect) + sect - 1; -} - -/* Returns current position, in sectors, for given drive */ -static int fd_sector(FDrive *drv) -{ - return fd_sector_calc(drv->head, drv->track, drv->sect, drv->last_sect, - NUM_SIDES(drv)); -} - -/* Seek to a new position: - * returns 0 if already on right track - * returns 1 if track changed - * returns 2 if track is invalid - * returns 3 if sector is invalid - * returns 4 if seek is disabled - */ -static int fd_seek(FDrive *drv, uint8_t head, uint8_t track, uint8_t sect, - int enable_seek) -{ - uint32_t sector; - int ret; - - if (track > drv->max_track || - (head != 0 && (drv->flags & FDISK_DBL_SIDES) == 0)) { - FLOPPY_DPRINTF("try to read %d %02x %02x (max=%d %d %02x %02x)\n", - head, track, sect, 1, - (drv->flags & FDISK_DBL_SIDES) == 0 ? 0 : 1, - drv->max_track, drv->last_sect); - return 2; - } - if (sect > drv->last_sect) { - FLOPPY_DPRINTF("try to read %d %02x %02x (max=%d %d %02x %02x)\n", - head, track, sect, 1, - (drv->flags & FDISK_DBL_SIDES) == 0 ? 0 : 1, - drv->max_track, drv->last_sect); - return 3; - } - sector = fd_sector_calc(head, track, sect, drv->last_sect, NUM_SIDES(drv)); - ret = 0; - if (sector != fd_sector(drv)) { -#if 0 - if (!enable_seek) { - FLOPPY_DPRINTF("error: no implicit seek %d %02x %02x" - " (max=%d %02x %02x)\n", - head, track, sect, 1, drv->max_track, - drv->last_sect); - return 4; - } -#endif - drv->head = head; - if (drv->track != track) { - if (drv->bs != NULL && bdrv_is_inserted(drv->bs)) { - drv->media_changed = 0; - } - ret = 1; - } - drv->track = track; - drv->sect = sect; - } - - if (drv->bs == NULL || !bdrv_is_inserted(drv->bs)) { - ret = 2; - } - - return ret; -} - -/* Set drive back to track 0 */ -static void fd_recalibrate(FDrive *drv) -{ - FLOPPY_DPRINTF("recalibrate\n"); - fd_seek(drv, 0, 0, 1, 1); -} - -/* Revalidate a disk drive after a disk change */ -static void fd_revalidate(FDrive *drv) -{ - int nb_heads, max_track, last_sect, ro; - FDriveType drive; - FDriveRate rate; - - FLOPPY_DPRINTF("revalidate\n"); - if (drv->bs != NULL) { - ro = bdrv_is_read_only(drv->bs); - pick_geometry(drv->bs, &nb_heads, &max_track, - &last_sect, drv->drive, &drive, &rate); - if (!bdrv_is_inserted(drv->bs)) { - FLOPPY_DPRINTF("No disk in drive\n"); - } else { - FLOPPY_DPRINTF("Floppy disk (%d h %d t %d s) %s\n", nb_heads, - max_track, last_sect, ro ? "ro" : "rw"); - } - if (nb_heads == 1) { - drv->flags &= ~FDISK_DBL_SIDES; - } else { - drv->flags |= FDISK_DBL_SIDES; - } - drv->max_track = max_track; - drv->last_sect = last_sect; - drv->ro = ro; - drv->drive = drive; - drv->media_rate = rate; - } else { - FLOPPY_DPRINTF("No drive connected\n"); - drv->last_sect = 0; - drv->max_track = 0; - drv->flags &= ~FDISK_DBL_SIDES; - } -} - -/********************************************************/ -/* Intel 82078 floppy disk controller emulation */ - -static void fdctrl_reset(FDCtrl *fdctrl, int do_irq); -static void fdctrl_reset_fifo(FDCtrl *fdctrl); -static int fdctrl_transfer_handler (void *opaque, int nchan, - int dma_pos, int dma_len); -static void fdctrl_raise_irq(FDCtrl *fdctrl); -static FDrive *get_cur_drv(FDCtrl *fdctrl); - -static uint32_t fdctrl_read_statusA(FDCtrl *fdctrl); -static uint32_t fdctrl_read_statusB(FDCtrl *fdctrl); -static uint32_t fdctrl_read_dor(FDCtrl *fdctrl); -static void fdctrl_write_dor(FDCtrl *fdctrl, uint32_t value); -static uint32_t fdctrl_read_tape(FDCtrl *fdctrl); -static void fdctrl_write_tape(FDCtrl *fdctrl, uint32_t value); -static uint32_t fdctrl_read_main_status(FDCtrl *fdctrl); -static void fdctrl_write_rate(FDCtrl *fdctrl, uint32_t value); -static uint32_t fdctrl_read_data(FDCtrl *fdctrl); -static void fdctrl_write_data(FDCtrl *fdctrl, uint32_t value); -static uint32_t fdctrl_read_dir(FDCtrl *fdctrl); -static void fdctrl_write_ccr(FDCtrl *fdctrl, uint32_t value); - -enum { - FD_DIR_WRITE = 0, - FD_DIR_READ = 1, - FD_DIR_SCANE = 2, - FD_DIR_SCANL = 3, - FD_DIR_SCANH = 4, - FD_DIR_VERIFY = 5, -}; - -enum { - FD_STATE_MULTI = 0x01, /* multi track flag */ - FD_STATE_FORMAT = 0x02, /* format flag */ -}; - -enum { - FD_REG_SRA = 0x00, - FD_REG_SRB = 0x01, - FD_REG_DOR = 0x02, - FD_REG_TDR = 0x03, - FD_REG_MSR = 0x04, - FD_REG_DSR = 0x04, - FD_REG_FIFO = 0x05, - FD_REG_DIR = 0x07, - FD_REG_CCR = 0x07, -}; - -enum { - FD_CMD_READ_TRACK = 0x02, - FD_CMD_SPECIFY = 0x03, - FD_CMD_SENSE_DRIVE_STATUS = 0x04, - FD_CMD_WRITE = 0x05, - FD_CMD_READ = 0x06, - FD_CMD_RECALIBRATE = 0x07, - FD_CMD_SENSE_INTERRUPT_STATUS = 0x08, - FD_CMD_WRITE_DELETED = 0x09, - FD_CMD_READ_ID = 0x0a, - FD_CMD_READ_DELETED = 0x0c, - FD_CMD_FORMAT_TRACK = 0x0d, - FD_CMD_DUMPREG = 0x0e, - FD_CMD_SEEK = 0x0f, - FD_CMD_VERSION = 0x10, - FD_CMD_SCAN_EQUAL = 0x11, - FD_CMD_PERPENDICULAR_MODE = 0x12, - FD_CMD_CONFIGURE = 0x13, - FD_CMD_LOCK = 0x14, - FD_CMD_VERIFY = 0x16, - FD_CMD_POWERDOWN_MODE = 0x17, - FD_CMD_PART_ID = 0x18, - FD_CMD_SCAN_LOW_OR_EQUAL = 0x19, - FD_CMD_SCAN_HIGH_OR_EQUAL = 0x1d, - FD_CMD_SAVE = 0x2e, - FD_CMD_OPTION = 0x33, - FD_CMD_RESTORE = 0x4e, - FD_CMD_DRIVE_SPECIFICATION_COMMAND = 0x8e, - FD_CMD_RELATIVE_SEEK_OUT = 0x8f, - FD_CMD_FORMAT_AND_WRITE = 0xcd, - FD_CMD_RELATIVE_SEEK_IN = 0xcf, -}; - -enum { - FD_CONFIG_PRETRK = 0xff, /* Pre-compensation set to track 0 */ - FD_CONFIG_FIFOTHR = 0x0f, /* FIFO threshold set to 1 byte */ - FD_CONFIG_POLL = 0x10, /* Poll enabled */ - FD_CONFIG_EFIFO = 0x20, /* FIFO disabled */ - FD_CONFIG_EIS = 0x40, /* No implied seeks */ -}; - -enum { - FD_SR0_DS0 = 0x01, - FD_SR0_DS1 = 0x02, - FD_SR0_HEAD = 0x04, - FD_SR0_EQPMT = 0x10, - FD_SR0_SEEK = 0x20, - FD_SR0_ABNTERM = 0x40, - FD_SR0_INVCMD = 0x80, - FD_SR0_RDYCHG = 0xc0, -}; - -enum { - FD_SR1_MA = 0x01, /* Missing address mark */ - FD_SR1_NW = 0x02, /* Not writable */ - FD_SR1_EC = 0x80, /* End of cylinder */ -}; - -enum { - FD_SR2_SNS = 0x04, /* Scan not satisfied */ - FD_SR2_SEH = 0x08, /* Scan equal hit */ -}; - -enum { - FD_SRA_DIR = 0x01, - FD_SRA_nWP = 0x02, - FD_SRA_nINDX = 0x04, - FD_SRA_HDSEL = 0x08, - FD_SRA_nTRK0 = 0x10, - FD_SRA_STEP = 0x20, - FD_SRA_nDRV2 = 0x40, - FD_SRA_INTPEND = 0x80, -}; - -enum { - FD_SRB_MTR0 = 0x01, - FD_SRB_MTR1 = 0x02, - FD_SRB_WGATE = 0x04, - FD_SRB_RDATA = 0x08, - FD_SRB_WDATA = 0x10, - FD_SRB_DR0 = 0x20, -}; - -enum { -#if MAX_FD == 4 - FD_DOR_SELMASK = 0x03, -#else - FD_DOR_SELMASK = 0x01, -#endif - FD_DOR_nRESET = 0x04, - FD_DOR_DMAEN = 0x08, - FD_DOR_MOTEN0 = 0x10, - FD_DOR_MOTEN1 = 0x20, - FD_DOR_MOTEN2 = 0x40, - FD_DOR_MOTEN3 = 0x80, -}; - -enum { -#if MAX_FD == 4 - FD_TDR_BOOTSEL = 0x0c, -#else - FD_TDR_BOOTSEL = 0x04, -#endif -}; - -enum { - FD_DSR_DRATEMASK= 0x03, - FD_DSR_PWRDOWN = 0x40, - FD_DSR_SWRESET = 0x80, -}; - -enum { - FD_MSR_DRV0BUSY = 0x01, - FD_MSR_DRV1BUSY = 0x02, - FD_MSR_DRV2BUSY = 0x04, - FD_MSR_DRV3BUSY = 0x08, - FD_MSR_CMDBUSY = 0x10, - FD_MSR_NONDMA = 0x20, - FD_MSR_DIO = 0x40, - FD_MSR_RQM = 0x80, -}; - -enum { - FD_DIR_DSKCHG = 0x80, -}; - -#define FD_MULTI_TRACK(state) ((state) & FD_STATE_MULTI) -#define FD_FORMAT_CMD(state) ((state) & FD_STATE_FORMAT) - -struct FDCtrl { - MemoryRegion iomem; - qemu_irq irq; - /* Controller state */ - QEMUTimer *result_timer; - int dma_chann; - /* Controller's identification */ - uint8_t version; - /* HW */ - uint8_t sra; - uint8_t srb; - uint8_t dor; - uint8_t dor_vmstate; /* only used as temp during vmstate */ - uint8_t tdr; - uint8_t dsr; - uint8_t msr; - uint8_t cur_drv; - uint8_t status0; - uint8_t status1; - uint8_t status2; - /* Command FIFO */ - uint8_t *fifo; - int32_t fifo_size; - uint32_t data_pos; - uint32_t data_len; - uint8_t data_state; - uint8_t data_dir; - uint8_t eot; /* last wanted sector */ - /* States kept only to be returned back */ - /* precompensation */ - uint8_t precomp_trk; - uint8_t config; - uint8_t lock; - /* Power down config (also with status regB access mode */ - uint8_t pwrd; - /* Floppy drives */ - uint8_t num_floppies; - /* Sun4m quirks? */ - int sun4m; - FDrive drives[MAX_FD]; - int reset_sensei; - uint32_t check_media_rate; - /* Timers state */ - uint8_t timer0; - uint8_t timer1; -}; - -typedef struct FDCtrlSysBus { - SysBusDevice busdev; - struct FDCtrl state; -} FDCtrlSysBus; - -typedef struct FDCtrlISABus { - ISADevice busdev; - uint32_t iobase; - uint32_t irq; - uint32_t dma; - struct FDCtrl state; - int32_t bootindexA; - int32_t bootindexB; -} FDCtrlISABus; - -static uint32_t fdctrl_read (void *opaque, uint32_t reg) -{ - FDCtrl *fdctrl = opaque; - uint32_t retval; - - reg &= 7; - switch (reg) { - case FD_REG_SRA: - retval = fdctrl_read_statusA(fdctrl); - break; - case FD_REG_SRB: - retval = fdctrl_read_statusB(fdctrl); - break; - case FD_REG_DOR: - retval = fdctrl_read_dor(fdctrl); - break; - case FD_REG_TDR: - retval = fdctrl_read_tape(fdctrl); - break; - case FD_REG_MSR: - retval = fdctrl_read_main_status(fdctrl); - break; - case FD_REG_FIFO: - retval = fdctrl_read_data(fdctrl); - break; - case FD_REG_DIR: - retval = fdctrl_read_dir(fdctrl); - break; - default: - retval = (uint32_t)(-1); - break; - } - FLOPPY_DPRINTF("read reg%d: 0x%02x\n", reg & 7, retval); - - return retval; -} - -static void fdctrl_write (void *opaque, uint32_t reg, uint32_t value) -{ - FDCtrl *fdctrl = opaque; - - FLOPPY_DPRINTF("write reg%d: 0x%02x\n", reg & 7, value); - - reg &= 7; - switch (reg) { - case FD_REG_DOR: - fdctrl_write_dor(fdctrl, value); - break; - case FD_REG_TDR: - fdctrl_write_tape(fdctrl, value); - break; - case FD_REG_DSR: - fdctrl_write_rate(fdctrl, value); - break; - case FD_REG_FIFO: - fdctrl_write_data(fdctrl, value); - break; - case FD_REG_CCR: - fdctrl_write_ccr(fdctrl, value); - break; - default: - break; - } -} - -static uint64_t fdctrl_read_mem (void *opaque, hwaddr reg, - unsigned ize) -{ - return fdctrl_read(opaque, (uint32_t)reg); -} - -static void fdctrl_write_mem (void *opaque, hwaddr reg, - uint64_t value, unsigned size) -{ - fdctrl_write(opaque, (uint32_t)reg, value); -} - -static const MemoryRegionOps fdctrl_mem_ops = { - .read = fdctrl_read_mem, - .write = fdctrl_write_mem, - .endianness = DEVICE_NATIVE_ENDIAN, -}; - -static const MemoryRegionOps fdctrl_mem_strict_ops = { - .read = fdctrl_read_mem, - .write = fdctrl_write_mem, - .endianness = DEVICE_NATIVE_ENDIAN, - .valid = { - .min_access_size = 1, - .max_access_size = 1, - }, -}; - -static bool fdrive_media_changed_needed(void *opaque) -{ - FDrive *drive = opaque; - - return (drive->bs != NULL && drive->media_changed != 1); -} - -static const VMStateDescription vmstate_fdrive_media_changed = { - .name = "fdrive/media_changed", - .version_id = 1, - .minimum_version_id = 1, - .minimum_version_id_old = 1, - .fields = (VMStateField[]) { - VMSTATE_UINT8(media_changed, FDrive), - VMSTATE_END_OF_LIST() - } -}; - -static bool fdrive_media_rate_needed(void *opaque) -{ - FDrive *drive = opaque; - - return drive->fdctrl->check_media_rate; -} - -static const VMStateDescription vmstate_fdrive_media_rate = { - .name = "fdrive/media_rate", - .version_id = 1, - .minimum_version_id = 1, - .minimum_version_id_old = 1, - .fields = (VMStateField[]) { - VMSTATE_UINT8(media_rate, FDrive), - VMSTATE_END_OF_LIST() - } -}; - -static const VMStateDescription vmstate_fdrive = { - .name = "fdrive", - .version_id = 1, - .minimum_version_id = 1, - .minimum_version_id_old = 1, - .fields = (VMStateField[]) { - VMSTATE_UINT8(head, FDrive), - VMSTATE_UINT8(track, FDrive), - VMSTATE_UINT8(sect, FDrive), - VMSTATE_END_OF_LIST() - }, - .subsections = (VMStateSubsection[]) { - { - .vmsd = &vmstate_fdrive_media_changed, - .needed = &fdrive_media_changed_needed, - } , { - .vmsd = &vmstate_fdrive_media_rate, - .needed = &fdrive_media_rate_needed, - } , { - /* empty */ - } - } -}; - -static void fdc_pre_save(void *opaque) -{ - FDCtrl *s = opaque; - - s->dor_vmstate = s->dor | GET_CUR_DRV(s); -} - -static int fdc_post_load(void *opaque, int version_id) -{ - FDCtrl *s = opaque; - - SET_CUR_DRV(s, s->dor_vmstate & FD_DOR_SELMASK); - s->dor = s->dor_vmstate & ~FD_DOR_SELMASK; - return 0; -} - -static const VMStateDescription vmstate_fdc = { - .name = "fdc", - .version_id = 2, - .minimum_version_id = 2, - .minimum_version_id_old = 2, - .pre_save = fdc_pre_save, - .post_load = fdc_post_load, - .fields = (VMStateField []) { - /* Controller State */ - VMSTATE_UINT8(sra, FDCtrl), - VMSTATE_UINT8(srb, FDCtrl), - VMSTATE_UINT8(dor_vmstate, FDCtrl), - VMSTATE_UINT8(tdr, FDCtrl), - VMSTATE_UINT8(dsr, FDCtrl), - VMSTATE_UINT8(msr, FDCtrl), - VMSTATE_UINT8(status0, FDCtrl), - VMSTATE_UINT8(status1, FDCtrl), - VMSTATE_UINT8(status2, FDCtrl), - /* Command FIFO */ - VMSTATE_VARRAY_INT32(fifo, FDCtrl, fifo_size, 0, vmstate_info_uint8, - uint8_t), - VMSTATE_UINT32(data_pos, FDCtrl), - VMSTATE_UINT32(data_len, FDCtrl), - VMSTATE_UINT8(data_state, FDCtrl), - VMSTATE_UINT8(data_dir, FDCtrl), - VMSTATE_UINT8(eot, FDCtrl), - /* States kept only to be returned back */ - VMSTATE_UINT8(timer0, FDCtrl), - VMSTATE_UINT8(timer1, FDCtrl), - VMSTATE_UINT8(precomp_trk, FDCtrl), - VMSTATE_UINT8(config, FDCtrl), - VMSTATE_UINT8(lock, FDCtrl), - VMSTATE_UINT8(pwrd, FDCtrl), - VMSTATE_UINT8_EQUAL(num_floppies, FDCtrl), - VMSTATE_STRUCT_ARRAY(drives, FDCtrl, MAX_FD, 1, - vmstate_fdrive, FDrive), - VMSTATE_END_OF_LIST() - } -}; - -static void fdctrl_external_reset_sysbus(DeviceState *d) -{ - FDCtrlSysBus *sys = container_of(d, FDCtrlSysBus, busdev.qdev); - FDCtrl *s = &sys->state; - - fdctrl_reset(s, 0); -} - -static void fdctrl_external_reset_isa(DeviceState *d) -{ - FDCtrlISABus *isa = container_of(d, FDCtrlISABus, busdev.qdev); - FDCtrl *s = &isa->state; - - fdctrl_reset(s, 0); -} - -static void fdctrl_handle_tc(void *opaque, int irq, int level) -{ - //FDCtrl *s = opaque; - - if (level) { - // XXX - FLOPPY_DPRINTF("TC pulsed\n"); - } -} - -/* Change IRQ state */ -static void fdctrl_reset_irq(FDCtrl *fdctrl) -{ - fdctrl->status0 = 0; - if (!(fdctrl->sra & FD_SRA_INTPEND)) - return; - FLOPPY_DPRINTF("Reset interrupt\n"); - qemu_set_irq(fdctrl->irq, 0); - fdctrl->sra &= ~FD_SRA_INTPEND; -} - -static void fdctrl_raise_irq(FDCtrl *fdctrl) -{ - /* Sparc mutation */ - if (fdctrl->sun4m && (fdctrl->msr & FD_MSR_CMDBUSY)) { - /* XXX: not sure */ - fdctrl->msr &= ~FD_MSR_CMDBUSY; - fdctrl->msr |= FD_MSR_RQM | FD_MSR_DIO; - return; - } - if (!(fdctrl->sra & FD_SRA_INTPEND)) { - qemu_set_irq(fdctrl->irq, 1); - fdctrl->sra |= FD_SRA_INTPEND; - } - - fdctrl->reset_sensei = 0; - FLOPPY_DPRINTF("Set interrupt status to 0x%02x\n", fdctrl->status0); -} - -/* Reset controller */ -static void fdctrl_reset(FDCtrl *fdctrl, int do_irq) -{ - int i; - - FLOPPY_DPRINTF("reset controller\n"); - fdctrl_reset_irq(fdctrl); - /* Initialise controller */ - fdctrl->sra = 0; - fdctrl->srb = 0xc0; - if (!fdctrl->drives[1].bs) - fdctrl->sra |= FD_SRA_nDRV2; - fdctrl->cur_drv = 0; - fdctrl->dor = FD_DOR_nRESET; - fdctrl->dor |= (fdctrl->dma_chann != -1) ? FD_DOR_DMAEN : 0; - fdctrl->msr = FD_MSR_RQM; - /* FIFO state */ - fdctrl->data_pos = 0; - fdctrl->data_len = 0; - fdctrl->data_state = 0; - fdctrl->data_dir = FD_DIR_WRITE; - for (i = 0; i < MAX_FD; i++) - fd_recalibrate(&fdctrl->drives[i]); - fdctrl_reset_fifo(fdctrl); - if (do_irq) { - fdctrl->status0 |= FD_SR0_RDYCHG; - fdctrl_raise_irq(fdctrl); - fdctrl->reset_sensei = FD_RESET_SENSEI_COUNT; - } -} - -static inline FDrive *drv0(FDCtrl *fdctrl) -{ - return &fdctrl->drives[(fdctrl->tdr & FD_TDR_BOOTSEL) >> 2]; -} - -static inline FDrive *drv1(FDCtrl *fdctrl) -{ - if ((fdctrl->tdr & FD_TDR_BOOTSEL) < (1 << 2)) - return &fdctrl->drives[1]; - else - return &fdctrl->drives[0]; -} - -#if MAX_FD == 4 -static inline FDrive *drv2(FDCtrl *fdctrl) -{ - if ((fdctrl->tdr & FD_TDR_BOOTSEL) < (2 << 2)) - return &fdctrl->drives[2]; - else - return &fdctrl->drives[1]; -} - -static inline FDrive *drv3(FDCtrl *fdctrl) -{ - if ((fdctrl->tdr & FD_TDR_BOOTSEL) < (3 << 2)) - return &fdctrl->drives[3]; - else - return &fdctrl->drives[2]; -} -#endif - -static FDrive *get_cur_drv(FDCtrl *fdctrl) -{ - switch (fdctrl->cur_drv) { - case 0: return drv0(fdctrl); - case 1: return drv1(fdctrl); -#if MAX_FD == 4 - case 2: return drv2(fdctrl); - case 3: return drv3(fdctrl); -#endif - default: return NULL; - } -} - -/* Status A register : 0x00 (read-only) */ -static uint32_t fdctrl_read_statusA(FDCtrl *fdctrl) -{ - uint32_t retval = fdctrl->sra; - - FLOPPY_DPRINTF("status register A: 0x%02x\n", retval); - - return retval; -} - -/* Status B register : 0x01 (read-only) */ -static uint32_t fdctrl_read_statusB(FDCtrl *fdctrl) -{ - uint32_t retval = fdctrl->srb; - - FLOPPY_DPRINTF("status register B: 0x%02x\n", retval); - - return retval; -} - -/* Digital output register : 0x02 */ -static uint32_t fdctrl_read_dor(FDCtrl *fdctrl) -{ - uint32_t retval = fdctrl->dor; - - /* Selected drive */ - retval |= fdctrl->cur_drv; - FLOPPY_DPRINTF("digital output register: 0x%02x\n", retval); - - return retval; -} - -static void fdctrl_write_dor(FDCtrl *fdctrl, uint32_t value) -{ - FLOPPY_DPRINTF("digital output register set to 0x%02x\n", value); - - /* Motors */ - if (value & FD_DOR_MOTEN0) - fdctrl->srb |= FD_SRB_MTR0; - else - fdctrl->srb &= ~FD_SRB_MTR0; - if (value & FD_DOR_MOTEN1) - fdctrl->srb |= FD_SRB_MTR1; - else - fdctrl->srb &= ~FD_SRB_MTR1; - - /* Drive */ - if (value & 1) - fdctrl->srb |= FD_SRB_DR0; - else - fdctrl->srb &= ~FD_SRB_DR0; - - /* Reset */ - if (!(value & FD_DOR_nRESET)) { - if (fdctrl->dor & FD_DOR_nRESET) { - FLOPPY_DPRINTF("controller enter RESET state\n"); - } - } else { - if (!(fdctrl->dor & FD_DOR_nRESET)) { - FLOPPY_DPRINTF("controller out of RESET state\n"); - fdctrl_reset(fdctrl, 1); - fdctrl->dsr &= ~FD_DSR_PWRDOWN; - } - } - /* Selected drive */ - fdctrl->cur_drv = value & FD_DOR_SELMASK; - - fdctrl->dor = value; -} - -/* Tape drive register : 0x03 */ -static uint32_t fdctrl_read_tape(FDCtrl *fdctrl) -{ - uint32_t retval = fdctrl->tdr; - - FLOPPY_DPRINTF("tape drive register: 0x%02x\n", retval); - - return retval; -} - -static void fdctrl_write_tape(FDCtrl *fdctrl, uint32_t value) -{ - /* Reset mode */ - if (!(fdctrl->dor & FD_DOR_nRESET)) { - FLOPPY_DPRINTF("Floppy controller in RESET state !\n"); - return; - } - FLOPPY_DPRINTF("tape drive register set to 0x%02x\n", value); - /* Disk boot selection indicator */ - fdctrl->tdr = value & FD_TDR_BOOTSEL; - /* Tape indicators: never allow */ -} - -/* Main status register : 0x04 (read) */ -static uint32_t fdctrl_read_main_status(FDCtrl *fdctrl) -{ - uint32_t retval = fdctrl->msr; - - fdctrl->dsr &= ~FD_DSR_PWRDOWN; - fdctrl->dor |= FD_DOR_nRESET; - - /* Sparc mutation */ - if (fdctrl->sun4m) { - retval |= FD_MSR_DIO; - fdctrl_reset_irq(fdctrl); - }; - - FLOPPY_DPRINTF("main status register: 0x%02x\n", retval); - - return retval; -} - -/* Data select rate register : 0x04 (write) */ -static void fdctrl_write_rate(FDCtrl *fdctrl, uint32_t value) -{ - /* Reset mode */ - if (!(fdctrl->dor & FD_DOR_nRESET)) { - FLOPPY_DPRINTF("Floppy controller in RESET state !\n"); - return; - } - FLOPPY_DPRINTF("select rate register set to 0x%02x\n", value); - /* Reset: autoclear */ - if (value & FD_DSR_SWRESET) { - fdctrl->dor &= ~FD_DOR_nRESET; - fdctrl_reset(fdctrl, 1); - fdctrl->dor |= FD_DOR_nRESET; - } - if (value & FD_DSR_PWRDOWN) { - fdctrl_reset(fdctrl, 1); - } - fdctrl->dsr = value; -} - -/* Configuration control register: 0x07 (write) */ -static void fdctrl_write_ccr(FDCtrl *fdctrl, uint32_t value) -{ - /* Reset mode */ - if (!(fdctrl->dor & FD_DOR_nRESET)) { - FLOPPY_DPRINTF("Floppy controller in RESET state !\n"); - return; - } - FLOPPY_DPRINTF("configuration control register set to 0x%02x\n", value); - - /* Only the rate selection bits used in AT mode, and we - * store those in the DSR. - */ - fdctrl->dsr = (fdctrl->dsr & ~FD_DSR_DRATEMASK) | - (value & FD_DSR_DRATEMASK); -} - -static int fdctrl_media_changed(FDrive *drv) -{ - return drv->media_changed; -} - -/* Digital input register : 0x07 (read-only) */ -static uint32_t fdctrl_read_dir(FDCtrl *fdctrl) -{ - uint32_t retval = 0; - - if (fdctrl_media_changed(get_cur_drv(fdctrl))) { - retval |= FD_DIR_DSKCHG; - } - if (retval != 0) { - FLOPPY_DPRINTF("Floppy digital input register: 0x%02x\n", retval); - } - - return retval; -} - -/* FIFO state control */ -static void fdctrl_reset_fifo(FDCtrl *fdctrl) -{ - fdctrl->data_dir = FD_DIR_WRITE; - fdctrl->data_pos = 0; - fdctrl->msr &= ~(FD_MSR_CMDBUSY | FD_MSR_DIO); -} - -/* Set FIFO status for the host to read */ -static void fdctrl_set_fifo(FDCtrl *fdctrl, int fifo_len) -{ - fdctrl->data_dir = FD_DIR_READ; - fdctrl->data_len = fifo_len; - fdctrl->data_pos = 0; - fdctrl->msr |= FD_MSR_CMDBUSY | FD_MSR_RQM | FD_MSR_DIO; -} - -/* Set an error: unimplemented/unknown command */ -static void fdctrl_unimplemented(FDCtrl *fdctrl, int direction) -{ - qemu_log_mask(LOG_UNIMP, "fdc: unimplemented command 0x%02x\n", - fdctrl->fifo[0]); - fdctrl->fifo[0] = FD_SR0_INVCMD; - fdctrl_set_fifo(fdctrl, 1); -} - -/* Seek to next sector - * returns 0 when end of track reached (for DBL_SIDES on head 1) - * otherwise returns 1 - */ -static int fdctrl_seek_to_next_sect(FDCtrl *fdctrl, FDrive *cur_drv) -{ - FLOPPY_DPRINTF("seek to next sector (%d %02x %02x => %d)\n", - cur_drv->head, cur_drv->track, cur_drv->sect, - fd_sector(cur_drv)); - /* XXX: cur_drv->sect >= cur_drv->last_sect should be an - error in fact */ - uint8_t new_head = cur_drv->head; - uint8_t new_track = cur_drv->track; - uint8_t new_sect = cur_drv->sect; - - int ret = 1; - - if (new_sect >= cur_drv->last_sect || - new_sect == fdctrl->eot) { - new_sect = 1; - if (FD_MULTI_TRACK(fdctrl->data_state)) { - if (new_head == 0 && - (cur_drv->flags & FDISK_DBL_SIDES) != 0) { - new_head = 1; - } else { - new_head = 0; - new_track++; - fdctrl->status0 |= FD_SR0_SEEK; - if ((cur_drv->flags & FDISK_DBL_SIDES) == 0) { - ret = 0; - } - } - } else { - fdctrl->status0 |= FD_SR0_SEEK; - new_track++; - ret = 0; - } - if (ret == 1) { - FLOPPY_DPRINTF("seek to next track (%d %02x %02x => %d)\n", - new_head, new_track, new_sect, fd_sector(cur_drv)); - } - } else { - new_sect++; - } - fd_seek(cur_drv, new_head, new_track, new_sect, 1); - return ret; -} - -/* Callback for transfer end (stop or abort) */ -static void fdctrl_stop_transfer(FDCtrl *fdctrl, uint8_t status0, - uint8_t status1, uint8_t status2) -{ - FDrive *cur_drv; - cur_drv = get_cur_drv(fdctrl); - - fdctrl->status0 &= ~(FD_SR0_DS0 | FD_SR0_DS1 | FD_SR0_HEAD); - fdctrl->status0 |= GET_CUR_DRV(fdctrl); - if (cur_drv->head) { - fdctrl->status0 |= FD_SR0_HEAD; - } - fdctrl->status0 |= status0; - - FLOPPY_DPRINTF("transfer status: %02x %02x %02x (%02x)\n", - status0, status1, status2, fdctrl->status0); - fdctrl->fifo[0] = fdctrl->status0; - fdctrl->fifo[1] = status1; - fdctrl->fifo[2] = status2; - fdctrl->fifo[3] = cur_drv->track; - fdctrl->fifo[4] = cur_drv->head; - fdctrl->fifo[5] = cur_drv->sect; - fdctrl->fifo[6] = FD_SECTOR_SC; - fdctrl->data_dir = FD_DIR_READ; - if (!(fdctrl->msr & FD_MSR_NONDMA)) { - DMA_release_DREQ(fdctrl->dma_chann); - } - fdctrl->msr |= FD_MSR_RQM | FD_MSR_DIO; - fdctrl->msr &= ~FD_MSR_NONDMA; - - fdctrl_set_fifo(fdctrl, 7); - fdctrl_raise_irq(fdctrl); -} - -/* Prepare a data transfer (either DMA or FIFO) */ -static void fdctrl_start_transfer(FDCtrl *fdctrl, int direction) -{ - FDrive *cur_drv; - uint8_t kh, kt, ks; - - SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK); - cur_drv = get_cur_drv(fdctrl); - kt = fdctrl->fifo[2]; - kh = fdctrl->fifo[3]; - ks = fdctrl->fifo[4]; - FLOPPY_DPRINTF("Start transfer at %d %d %02x %02x (%d)\n", - GET_CUR_DRV(fdctrl), kh, kt, ks, - fd_sector_calc(kh, kt, ks, cur_drv->last_sect, - NUM_SIDES(cur_drv))); - switch (fd_seek(cur_drv, kh, kt, ks, fdctrl->config & FD_CONFIG_EIS)) { - case 2: - /* sect too big */ - fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, 0x00, 0x00); - fdctrl->fifo[3] = kt; - fdctrl->fifo[4] = kh; - fdctrl->fifo[5] = ks; - return; - case 3: - /* track too big */ - fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, FD_SR1_EC, 0x00); - fdctrl->fifo[3] = kt; - fdctrl->fifo[4] = kh; - fdctrl->fifo[5] = ks; - return; - case 4: - /* No seek enabled */ - fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, 0x00, 0x00); - fdctrl->fifo[3] = kt; - fdctrl->fifo[4] = kh; - fdctrl->fifo[5] = ks; - return; - case 1: - fdctrl->status0 |= FD_SR0_SEEK; - break; - default: - break; - } - - /* Check the data rate. If the programmed data rate does not match - * the currently inserted medium, the operation has to fail. */ - if (fdctrl->check_media_rate && - (fdctrl->dsr & FD_DSR_DRATEMASK) != cur_drv->media_rate) { - FLOPPY_DPRINTF("data rate mismatch (fdc=%d, media=%d)\n", - fdctrl->dsr & FD_DSR_DRATEMASK, cur_drv->media_rate); - fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, FD_SR1_MA, 0x00); - fdctrl->fifo[3] = kt; - fdctrl->fifo[4] = kh; - fdctrl->fifo[5] = ks; - return; - } - - /* Set the FIFO state */ - fdctrl->data_dir = direction; - fdctrl->data_pos = 0; - assert(fdctrl->msr & FD_MSR_CMDBUSY); - if (fdctrl->fifo[0] & 0x80) - fdctrl->data_state |= FD_STATE_MULTI; - else - fdctrl->data_state &= ~FD_STATE_MULTI; - if (fdctrl->fifo[5] == 0) { - fdctrl->data_len = fdctrl->fifo[8]; - } else { - int tmp; - fdctrl->data_len = 128 << (fdctrl->fifo[5] > 7 ? 7 : fdctrl->fifo[5]); - tmp = (fdctrl->fifo[6] - ks + 1); - if (fdctrl->fifo[0] & 0x80) - tmp += fdctrl->fifo[6]; - fdctrl->data_len *= tmp; - } - fdctrl->eot = fdctrl->fifo[6]; - if (fdctrl->dor & FD_DOR_DMAEN) { - int dma_mode; - /* DMA transfer are enabled. Check if DMA channel is well programmed */ - dma_mode = DMA_get_channel_mode(fdctrl->dma_chann); - dma_mode = (dma_mode >> 2) & 3; - FLOPPY_DPRINTF("dma_mode=%d direction=%d (%d - %d)\n", - dma_mode, direction, - (128 << fdctrl->fifo[5]) * - (cur_drv->last_sect - ks + 1), fdctrl->data_len); - if (((direction == FD_DIR_SCANE || direction == FD_DIR_SCANL || - direction == FD_DIR_SCANH) && dma_mode == 0) || - (direction == FD_DIR_WRITE && dma_mode == 2) || - (direction == FD_DIR_READ && dma_mode == 1) || - (direction == FD_DIR_VERIFY)) { - /* No access is allowed until DMA transfer has completed */ - fdctrl->msr &= ~FD_MSR_RQM; - if (direction != FD_DIR_VERIFY) { - /* Now, we just have to wait for the DMA controller to - * recall us... - */ - DMA_hold_DREQ(fdctrl->dma_chann); - DMA_schedule(fdctrl->dma_chann); - } else { - /* Start transfer */ - fdctrl_transfer_handler(fdctrl, fdctrl->dma_chann, 0, - fdctrl->data_len); - } - return; - } else { - FLOPPY_DPRINTF("bad dma_mode=%d direction=%d\n", dma_mode, - direction); - } - } - FLOPPY_DPRINTF("start non-DMA transfer\n"); - fdctrl->msr |= FD_MSR_NONDMA; - if (direction != FD_DIR_WRITE) - fdctrl->msr |= FD_MSR_DIO; - /* IO based transfer: calculate len */ - fdctrl_raise_irq(fdctrl); -} - -/* Prepare a transfer of deleted data */ -static void fdctrl_start_transfer_del(FDCtrl *fdctrl, int direction) -{ - qemu_log_mask(LOG_UNIMP, "fdctrl_start_transfer_del() unimplemented\n"); - - /* We don't handle deleted data, - * so we don't return *ANYTHING* - */ - fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM | FD_SR0_SEEK, 0x00, 0x00); -} - -/* handlers for DMA transfers */ -static int fdctrl_transfer_handler (void *opaque, int nchan, - int dma_pos, int dma_len) -{ - FDCtrl *fdctrl; - FDrive *cur_drv; - int len, start_pos, rel_pos; - uint8_t status0 = 0x00, status1 = 0x00, status2 = 0x00; - - fdctrl = opaque; - if (fdctrl->msr & FD_MSR_RQM) { - FLOPPY_DPRINTF("Not in DMA transfer mode !\n"); - return 0; - } - cur_drv = get_cur_drv(fdctrl); - if (fdctrl->data_dir == FD_DIR_SCANE || fdctrl->data_dir == FD_DIR_SCANL || - fdctrl->data_dir == FD_DIR_SCANH) - status2 = FD_SR2_SNS; - if (dma_len > fdctrl->data_len) - dma_len = fdctrl->data_len; - if (cur_drv->bs == NULL) { - if (fdctrl->data_dir == FD_DIR_WRITE) - fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM | FD_SR0_SEEK, 0x00, 0x00); - else - fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, 0x00, 0x00); - len = 0; - goto transfer_error; - } - rel_pos = fdctrl->data_pos % FD_SECTOR_LEN; - for (start_pos = fdctrl->data_pos; fdctrl->data_pos < dma_len;) { - len = dma_len - fdctrl->data_pos; - if (len + rel_pos > FD_SECTOR_LEN) - len = FD_SECTOR_LEN - rel_pos; - FLOPPY_DPRINTF("copy %d bytes (%d %d %d) %d pos %d %02x " - "(%d-0x%08x 0x%08x)\n", len, dma_len, fdctrl->data_pos, - fdctrl->data_len, GET_CUR_DRV(fdctrl), cur_drv->head, - cur_drv->track, cur_drv->sect, fd_sector(cur_drv), - fd_sector(cur_drv) * FD_SECTOR_LEN); - if (fdctrl->data_dir != FD_DIR_WRITE || - len < FD_SECTOR_LEN || rel_pos != 0) { - /* READ & SCAN commands and realign to a sector for WRITE */ - if (bdrv_read(cur_drv->bs, fd_sector(cur_drv), - fdctrl->fifo, 1) < 0) { - FLOPPY_DPRINTF("Floppy: error getting sector %d\n", - fd_sector(cur_drv)); - /* Sure, image size is too small... */ - memset(fdctrl->fifo, 0, FD_SECTOR_LEN); - } - } - switch (fdctrl->data_dir) { - case FD_DIR_READ: - /* READ commands */ - DMA_write_memory (nchan, fdctrl->fifo + rel_pos, - fdctrl->data_pos, len); - break; - case FD_DIR_WRITE: - /* WRITE commands */ - if (cur_drv->ro) { - /* Handle readonly medium early, no need to do DMA, touch the - * LED or attempt any writes. A real floppy doesn't attempt - * to write to readonly media either. */ - fdctrl_stop_transfer(fdctrl, - FD_SR0_ABNTERM | FD_SR0_SEEK, FD_SR1_NW, - 0x00); - goto transfer_error; - } - - DMA_read_memory (nchan, fdctrl->fifo + rel_pos, - fdctrl->data_pos, len); - if (bdrv_write(cur_drv->bs, fd_sector(cur_drv), - fdctrl->fifo, 1) < 0) { - FLOPPY_DPRINTF("error writing sector %d\n", - fd_sector(cur_drv)); - fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM | FD_SR0_SEEK, 0x00, 0x00); - goto transfer_error; - } - break; - case FD_DIR_VERIFY: - /* VERIFY commands */ - break; - default: - /* SCAN commands */ - { - uint8_t tmpbuf[FD_SECTOR_LEN]; - int ret; - DMA_read_memory (nchan, tmpbuf, fdctrl->data_pos, len); - ret = memcmp(tmpbuf, fdctrl->fifo + rel_pos, len); - if (ret == 0) { - status2 = FD_SR2_SEH; - goto end_transfer; - } - if ((ret < 0 && fdctrl->data_dir == FD_DIR_SCANL) || - (ret > 0 && fdctrl->data_dir == FD_DIR_SCANH)) { - status2 = 0x00; - goto end_transfer; - } - } - break; - } - fdctrl->data_pos += len; - rel_pos = fdctrl->data_pos % FD_SECTOR_LEN; - if (rel_pos == 0) { - /* Seek to next sector */ - if (!fdctrl_seek_to_next_sect(fdctrl, cur_drv)) - break; - } - } - end_transfer: - len = fdctrl->data_pos - start_pos; - FLOPPY_DPRINTF("end transfer %d %d %d\n", - fdctrl->data_pos, len, fdctrl->data_len); - if (fdctrl->data_dir == FD_DIR_SCANE || - fdctrl->data_dir == FD_DIR_SCANL || - fdctrl->data_dir == FD_DIR_SCANH) - status2 = FD_SR2_SEH; - fdctrl->data_len -= len; - fdctrl_stop_transfer(fdctrl, status0, status1, status2); - transfer_error: - - return len; -} - -/* Data register : 0x05 */ -static uint32_t fdctrl_read_data(FDCtrl *fdctrl) -{ - FDrive *cur_drv; - uint32_t retval = 0; - int pos; - - cur_drv = get_cur_drv(fdctrl); - fdctrl->dsr &= ~FD_DSR_PWRDOWN; - if (!(fdctrl->msr & FD_MSR_RQM) || !(fdctrl->msr & FD_MSR_DIO)) { - FLOPPY_DPRINTF("error: controller not ready for reading\n"); - return 0; - } - pos = fdctrl->data_pos; - if (fdctrl->msr & FD_MSR_NONDMA) { - pos %= FD_SECTOR_LEN; - if (pos == 0) { - if (fdctrl->data_pos != 0) - if (!fdctrl_seek_to_next_sect(fdctrl, cur_drv)) { - FLOPPY_DPRINTF("error seeking to next sector %d\n", - fd_sector(cur_drv)); - return 0; - } - if (bdrv_read(cur_drv->bs, fd_sector(cur_drv), fdctrl->fifo, 1) < 0) { - FLOPPY_DPRINTF("error getting sector %d\n", - fd_sector(cur_drv)); - /* Sure, image size is too small... */ - memset(fdctrl->fifo, 0, FD_SECTOR_LEN); - } - } - } - retval = fdctrl->fifo[pos]; - if (++fdctrl->data_pos == fdctrl->data_len) { - fdctrl->data_pos = 0; - /* Switch from transfer mode to status mode - * then from status mode to command mode - */ - if (fdctrl->msr & FD_MSR_NONDMA) { - fdctrl_stop_transfer(fdctrl, 0x00, 0x00, 0x00); - } else { - fdctrl_reset_fifo(fdctrl); - fdctrl_reset_irq(fdctrl); - } - } - FLOPPY_DPRINTF("data register: 0x%02x\n", retval); - - return retval; -} - -static void fdctrl_format_sector(FDCtrl *fdctrl) -{ - FDrive *cur_drv; - uint8_t kh, kt, ks; - - SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK); - cur_drv = get_cur_drv(fdctrl); - kt = fdctrl->fifo[6]; - kh = fdctrl->fifo[7]; - ks = fdctrl->fifo[8]; - FLOPPY_DPRINTF("format sector at %d %d %02x %02x (%d)\n", - GET_CUR_DRV(fdctrl), kh, kt, ks, - fd_sector_calc(kh, kt, ks, cur_drv->last_sect, - NUM_SIDES(cur_drv))); - switch (fd_seek(cur_drv, kh, kt, ks, fdctrl->config & FD_CONFIG_EIS)) { - case 2: - /* sect too big */ - fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, 0x00, 0x00); - fdctrl->fifo[3] = kt; - fdctrl->fifo[4] = kh; - fdctrl->fifo[5] = ks; - return; - case 3: - /* track too big */ - fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, FD_SR1_EC, 0x00); - fdctrl->fifo[3] = kt; - fdctrl->fifo[4] = kh; - fdctrl->fifo[5] = ks; - return; - case 4: - /* No seek enabled */ - fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, 0x00, 0x00); - fdctrl->fifo[3] = kt; - fdctrl->fifo[4] = kh; - fdctrl->fifo[5] = ks; - return; - case 1: - fdctrl->status0 |= FD_SR0_SEEK; - break; - default: - break; - } - memset(fdctrl->fifo, 0, FD_SECTOR_LEN); - if (cur_drv->bs == NULL || - bdrv_write(cur_drv->bs, fd_sector(cur_drv), fdctrl->fifo, 1) < 0) { - FLOPPY_DPRINTF("error formatting sector %d\n", fd_sector(cur_drv)); - fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM | FD_SR0_SEEK, 0x00, 0x00); - } else { - if (cur_drv->sect == cur_drv->last_sect) { - fdctrl->data_state &= ~FD_STATE_FORMAT; - /* Last sector done */ - fdctrl_stop_transfer(fdctrl, 0x00, 0x00, 0x00); - } else { - /* More to do */ - fdctrl->data_pos = 0; - fdctrl->data_len = 4; - } - } -} - -static void fdctrl_handle_lock(FDCtrl *fdctrl, int direction) -{ - fdctrl->lock = (fdctrl->fifo[0] & 0x80) ? 1 : 0; - fdctrl->fifo[0] = fdctrl->lock << 4; - fdctrl_set_fifo(fdctrl, 1); -} - -static void fdctrl_handle_dumpreg(FDCtrl *fdctrl, int direction) -{ - FDrive *cur_drv = get_cur_drv(fdctrl); - - /* Drives position */ - fdctrl->fifo[0] = drv0(fdctrl)->track; - fdctrl->fifo[1] = drv1(fdctrl)->track; -#if MAX_FD == 4 - fdctrl->fifo[2] = drv2(fdctrl)->track; - fdctrl->fifo[3] = drv3(fdctrl)->track; -#else - fdctrl->fifo[2] = 0; - fdctrl->fifo[3] = 0; -#endif - /* timers */ - fdctrl->fifo[4] = fdctrl->timer0; - fdctrl->fifo[5] = (fdctrl->timer1 << 1) | (fdctrl->dor & FD_DOR_DMAEN ? 1 : 0); - fdctrl->fifo[6] = cur_drv->last_sect; - fdctrl->fifo[7] = (fdctrl->lock << 7) | - (cur_drv->perpendicular << 2); - fdctrl->fifo[8] = fdctrl->config; - fdctrl->fifo[9] = fdctrl->precomp_trk; - fdctrl_set_fifo(fdctrl, 10); -} - -static void fdctrl_handle_version(FDCtrl *fdctrl, int direction) -{ - /* Controller's version */ - fdctrl->fifo[0] = fdctrl->version; - fdctrl_set_fifo(fdctrl, 1); -} - -static void fdctrl_handle_partid(FDCtrl *fdctrl, int direction) -{ - fdctrl->fifo[0] = 0x41; /* Stepping 1 */ - fdctrl_set_fifo(fdctrl, 1); -} - -static void fdctrl_handle_restore(FDCtrl *fdctrl, int direction) -{ - FDrive *cur_drv = get_cur_drv(fdctrl); - - /* Drives position */ - drv0(fdctrl)->track = fdctrl->fifo[3]; - drv1(fdctrl)->track = fdctrl->fifo[4]; -#if MAX_FD == 4 - drv2(fdctrl)->track = fdctrl->fifo[5]; - drv3(fdctrl)->track = fdctrl->fifo[6]; -#endif - /* timers */ - fdctrl->timer0 = fdctrl->fifo[7]; - fdctrl->timer1 = fdctrl->fifo[8]; - cur_drv->last_sect = fdctrl->fifo[9]; - fdctrl->lock = fdctrl->fifo[10] >> 7; - cur_drv->perpendicular = (fdctrl->fifo[10] >> 2) & 0xF; - fdctrl->config = fdctrl->fifo[11]; - fdctrl->precomp_trk = fdctrl->fifo[12]; - fdctrl->pwrd = fdctrl->fifo[13]; - fdctrl_reset_fifo(fdctrl); -} - -static void fdctrl_handle_save(FDCtrl *fdctrl, int direction) -{ - FDrive *cur_drv = get_cur_drv(fdctrl); - - fdctrl->fifo[0] = 0; - fdctrl->fifo[1] = 0; - /* Drives position */ - fdctrl->fifo[2] = drv0(fdctrl)->track; - fdctrl->fifo[3] = drv1(fdctrl)->track; -#if MAX_FD == 4 - fdctrl->fifo[4] = drv2(fdctrl)->track; - fdctrl->fifo[5] = drv3(fdctrl)->track; -#else - fdctrl->fifo[4] = 0; - fdctrl->fifo[5] = 0; -#endif - /* timers */ - fdctrl->fifo[6] = fdctrl->timer0; - fdctrl->fifo[7] = fdctrl->timer1; - fdctrl->fifo[8] = cur_drv->last_sect; - fdctrl->fifo[9] = (fdctrl->lock << 7) | - (cur_drv->perpendicular << 2); - fdctrl->fifo[10] = fdctrl->config; - fdctrl->fifo[11] = fdctrl->precomp_trk; - fdctrl->fifo[12] = fdctrl->pwrd; - fdctrl->fifo[13] = 0; - fdctrl->fifo[14] = 0; - fdctrl_set_fifo(fdctrl, 15); -} - -static void fdctrl_handle_readid(FDCtrl *fdctrl, int direction) -{ - FDrive *cur_drv = get_cur_drv(fdctrl); - - cur_drv->head = (fdctrl->fifo[1] >> 2) & 1; - qemu_mod_timer(fdctrl->result_timer, - qemu_get_clock_ns(vm_clock) + (get_ticks_per_sec() / 50)); -} - -static void fdctrl_handle_format_track(FDCtrl *fdctrl, int direction) -{ - FDrive *cur_drv; - - SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK); - cur_drv = get_cur_drv(fdctrl); - fdctrl->data_state |= FD_STATE_FORMAT; - if (fdctrl->fifo[0] & 0x80) - fdctrl->data_state |= FD_STATE_MULTI; - else - fdctrl->data_state &= ~FD_STATE_MULTI; - cur_drv->bps = - fdctrl->fifo[2] > 7 ? 16384 : 128 << fdctrl->fifo[2]; -#if 0 - cur_drv->last_sect = - cur_drv->flags & FDISK_DBL_SIDES ? fdctrl->fifo[3] : - fdctrl->fifo[3] / 2; -#else - cur_drv->last_sect = fdctrl->fifo[3]; -#endif - /* TODO: implement format using DMA expected by the Bochs BIOS - * and Linux fdformat (read 3 bytes per sector via DMA and fill - * the sector with the specified fill byte - */ - fdctrl->data_state &= ~FD_STATE_FORMAT; - fdctrl_stop_transfer(fdctrl, 0x00, 0x00, 0x00); -} - -static void fdctrl_handle_specify(FDCtrl *fdctrl, int direction) -{ - fdctrl->timer0 = (fdctrl->fifo[1] >> 4) & 0xF; - fdctrl->timer1 = fdctrl->fifo[2] >> 1; - if (fdctrl->fifo[2] & 1) - fdctrl->dor &= ~FD_DOR_DMAEN; - else - fdctrl->dor |= FD_DOR_DMAEN; - /* No result back */ - fdctrl_reset_fifo(fdctrl); -} - -static void fdctrl_handle_sense_drive_status(FDCtrl *fdctrl, int direction) -{ - FDrive *cur_drv; - - SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK); - cur_drv = get_cur_drv(fdctrl); - cur_drv->head = (fdctrl->fifo[1] >> 2) & 1; - /* 1 Byte status back */ - fdctrl->fifo[0] = (cur_drv->ro << 6) | - (cur_drv->track == 0 ? 0x10 : 0x00) | - (cur_drv->head << 2) | - GET_CUR_DRV(fdctrl) | - 0x28; - fdctrl_set_fifo(fdctrl, 1); -} - -static void fdctrl_handle_recalibrate(FDCtrl *fdctrl, int direction) -{ - FDrive *cur_drv; - - SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK); - cur_drv = get_cur_drv(fdctrl); - fd_recalibrate(cur_drv); - fdctrl_reset_fifo(fdctrl); - /* Raise Interrupt */ - fdctrl->status0 |= FD_SR0_SEEK; - fdctrl_raise_irq(fdctrl); -} - -static void fdctrl_handle_sense_interrupt_status(FDCtrl *fdctrl, int direction) -{ - FDrive *cur_drv = get_cur_drv(fdctrl); - - if (fdctrl->reset_sensei > 0) { - fdctrl->fifo[0] = - FD_SR0_RDYCHG + FD_RESET_SENSEI_COUNT - fdctrl->reset_sensei; - fdctrl->reset_sensei--; - } else if (!(fdctrl->sra & FD_SRA_INTPEND)) { - fdctrl->fifo[0] = FD_SR0_INVCMD; - fdctrl_set_fifo(fdctrl, 1); - return; - } else { - fdctrl->fifo[0] = - (fdctrl->status0 & ~(FD_SR0_HEAD | FD_SR0_DS1 | FD_SR0_DS0)) - | GET_CUR_DRV(fdctrl); - } - - fdctrl->fifo[1] = cur_drv->track; - fdctrl_set_fifo(fdctrl, 2); - fdctrl_reset_irq(fdctrl); - fdctrl->status0 = FD_SR0_RDYCHG; -} - -static void fdctrl_handle_seek(FDCtrl *fdctrl, int direction) -{ - FDrive *cur_drv; - - SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK); - cur_drv = get_cur_drv(fdctrl); - fdctrl_reset_fifo(fdctrl); - /* The seek command just sends step pulses to the drive and doesn't care if - * there is a medium inserted of if it's banging the head against the drive. - */ - fd_seek(cur_drv, cur_drv->head, fdctrl->fifo[2], cur_drv->sect, 1); - /* Raise Interrupt */ - fdctrl->status0 |= FD_SR0_SEEK; - fdctrl_raise_irq(fdctrl); -} - -static void fdctrl_handle_perpendicular_mode(FDCtrl *fdctrl, int direction) -{ - FDrive *cur_drv = get_cur_drv(fdctrl); - - if (fdctrl->fifo[1] & 0x80) - cur_drv->perpendicular = fdctrl->fifo[1] & 0x7; - /* No result back */ - fdctrl_reset_fifo(fdctrl); -} - -static void fdctrl_handle_configure(FDCtrl *fdctrl, int direction) -{ - fdctrl->config = fdctrl->fifo[2]; - fdctrl->precomp_trk = fdctrl->fifo[3]; - /* No result back */ - fdctrl_reset_fifo(fdctrl); -} - -static void fdctrl_handle_powerdown_mode(FDCtrl *fdctrl, int direction) -{ - fdctrl->pwrd = fdctrl->fifo[1]; - fdctrl->fifo[0] = fdctrl->fifo[1]; - fdctrl_set_fifo(fdctrl, 1); -} - -static void fdctrl_handle_option(FDCtrl *fdctrl, int direction) -{ - /* No result back */ - fdctrl_reset_fifo(fdctrl); -} - -static void fdctrl_handle_drive_specification_command(FDCtrl *fdctrl, int direction) -{ - FDrive *cur_drv = get_cur_drv(fdctrl); - - if (fdctrl->fifo[fdctrl->data_pos - 1] & 0x80) { - /* Command parameters done */ - if (fdctrl->fifo[fdctrl->data_pos - 1] & 0x40) { - fdctrl->fifo[0] = fdctrl->fifo[1]; - fdctrl->fifo[2] = 0; - fdctrl->fifo[3] = 0; - fdctrl_set_fifo(fdctrl, 4); - } else { - fdctrl_reset_fifo(fdctrl); - } - } else if (fdctrl->data_len > 7) { - /* ERROR */ - fdctrl->fifo[0] = 0x80 | - (cur_drv->head << 2) | GET_CUR_DRV(fdctrl); - fdctrl_set_fifo(fdctrl, 1); - } -} - -static void fdctrl_handle_relative_seek_in(FDCtrl *fdctrl, int direction) -{ - FDrive *cur_drv; - - SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK); - cur_drv = get_cur_drv(fdctrl); - if (fdctrl->fifo[2] + cur_drv->track >= cur_drv->max_track) { - fd_seek(cur_drv, cur_drv->head, cur_drv->max_track - 1, - cur_drv->sect, 1); - } else { - fd_seek(cur_drv, cur_drv->head, - cur_drv->track + fdctrl->fifo[2], cur_drv->sect, 1); - } - fdctrl_reset_fifo(fdctrl); - /* Raise Interrupt */ - fdctrl->status0 |= FD_SR0_SEEK; - fdctrl_raise_irq(fdctrl); -} - -static void fdctrl_handle_relative_seek_out(FDCtrl *fdctrl, int direction) -{ - FDrive *cur_drv; - - SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK); - cur_drv = get_cur_drv(fdctrl); - if (fdctrl->fifo[2] > cur_drv->track) { - fd_seek(cur_drv, cur_drv->head, 0, cur_drv->sect, 1); - } else { - fd_seek(cur_drv, cur_drv->head, - cur_drv->track - fdctrl->fifo[2], cur_drv->sect, 1); - } - fdctrl_reset_fifo(fdctrl); - /* Raise Interrupt */ - fdctrl->status0 |= FD_SR0_SEEK; - fdctrl_raise_irq(fdctrl); -} - -static const struct { - uint8_t value; - uint8_t mask; - const char* name; - int parameters; - void (*handler)(FDCtrl *fdctrl, int direction); - int direction; -} handlers[] = { - { FD_CMD_READ, 0x1f, "READ", 8, fdctrl_start_transfer, FD_DIR_READ }, - { FD_CMD_WRITE, 0x3f, "WRITE", 8, fdctrl_start_transfer, FD_DIR_WRITE }, - { FD_CMD_SEEK, 0xff, "SEEK", 2, fdctrl_handle_seek }, - { FD_CMD_SENSE_INTERRUPT_STATUS, 0xff, "SENSE INTERRUPT STATUS", 0, fdctrl_handle_sense_interrupt_status }, - { FD_CMD_RECALIBRATE, 0xff, "RECALIBRATE", 1, fdctrl_handle_recalibrate }, - { FD_CMD_FORMAT_TRACK, 0xbf, "FORMAT TRACK", 5, fdctrl_handle_format_track }, - { FD_CMD_READ_TRACK, 0xbf, "READ TRACK", 8, fdctrl_start_transfer, FD_DIR_READ }, - { FD_CMD_RESTORE, 0xff, "RESTORE", 17, fdctrl_handle_restore }, /* part of READ DELETED DATA */ - { FD_CMD_SAVE, 0xff, "SAVE", 0, fdctrl_handle_save }, /* part of READ DELETED DATA */ - { FD_CMD_READ_DELETED, 0x1f, "READ DELETED DATA", 8, fdctrl_start_transfer_del, FD_DIR_READ }, - { FD_CMD_SCAN_EQUAL, 0x1f, "SCAN EQUAL", 8, fdctrl_start_transfer, FD_DIR_SCANE }, - { FD_CMD_VERIFY, 0x1f, "VERIFY", 8, fdctrl_start_transfer, FD_DIR_VERIFY }, - { FD_CMD_SCAN_LOW_OR_EQUAL, 0x1f, "SCAN LOW OR EQUAL", 8, fdctrl_start_transfer, FD_DIR_SCANL }, - { FD_CMD_SCAN_HIGH_OR_EQUAL, 0x1f, "SCAN HIGH OR EQUAL", 8, fdctrl_start_transfer, FD_DIR_SCANH }, - { FD_CMD_WRITE_DELETED, 0x3f, "WRITE DELETED DATA", 8, fdctrl_start_transfer_del, FD_DIR_WRITE }, - { FD_CMD_READ_ID, 0xbf, "READ ID", 1, fdctrl_handle_readid }, - { FD_CMD_SPECIFY, 0xff, "SPECIFY", 2, fdctrl_handle_specify }, - { FD_CMD_SENSE_DRIVE_STATUS, 0xff, "SENSE DRIVE STATUS", 1, fdctrl_handle_sense_drive_status }, - { FD_CMD_PERPENDICULAR_MODE, 0xff, "PERPENDICULAR MODE", 1, fdctrl_handle_perpendicular_mode }, - { FD_CMD_CONFIGURE, 0xff, "CONFIGURE", 3, fdctrl_handle_configure }, - { FD_CMD_POWERDOWN_MODE, 0xff, "POWERDOWN MODE", 2, fdctrl_handle_powerdown_mode }, - { FD_CMD_OPTION, 0xff, "OPTION", 1, fdctrl_handle_option }, - { FD_CMD_DRIVE_SPECIFICATION_COMMAND, 0xff, "DRIVE SPECIFICATION COMMAND", 5, fdctrl_handle_drive_specification_command }, - { FD_CMD_RELATIVE_SEEK_OUT, 0xff, "RELATIVE SEEK OUT", 2, fdctrl_handle_relative_seek_out }, - { FD_CMD_FORMAT_AND_WRITE, 0xff, "FORMAT AND WRITE", 10, fdctrl_unimplemented }, - { FD_CMD_RELATIVE_SEEK_IN, 0xff, "RELATIVE SEEK IN", 2, fdctrl_handle_relative_seek_in }, - { FD_CMD_LOCK, 0x7f, "LOCK", 0, fdctrl_handle_lock }, - { FD_CMD_DUMPREG, 0xff, "DUMPREG", 0, fdctrl_handle_dumpreg }, - { FD_CMD_VERSION, 0xff, "VERSION", 0, fdctrl_handle_version }, - { FD_CMD_PART_ID, 0xff, "PART ID", 0, fdctrl_handle_partid }, - { FD_CMD_WRITE, 0x1f, "WRITE (BeOS)", 8, fdctrl_start_transfer, FD_DIR_WRITE }, /* not in specification ; BeOS 4.5 bug */ - { 0, 0, "unknown", 0, fdctrl_unimplemented }, /* default handler */ -}; -/* Associate command to an index in the 'handlers' array */ -static uint8_t command_to_handler[256]; - -static void fdctrl_write_data(FDCtrl *fdctrl, uint32_t value) -{ - FDrive *cur_drv; - int pos; - - /* Reset mode */ - if (!(fdctrl->dor & FD_DOR_nRESET)) { - FLOPPY_DPRINTF("Floppy controller in RESET state !\n"); - return; - } - if (!(fdctrl->msr & FD_MSR_RQM) || (fdctrl->msr & FD_MSR_DIO)) { - FLOPPY_DPRINTF("error: controller not ready for writing\n"); - return; - } - fdctrl->dsr &= ~FD_DSR_PWRDOWN; - /* Is it write command time ? */ - if (fdctrl->msr & FD_MSR_NONDMA) { - /* FIFO data write */ - pos = fdctrl->data_pos++; - pos %= FD_SECTOR_LEN; - fdctrl->fifo[pos] = value; - if (pos == FD_SECTOR_LEN - 1 || - fdctrl->data_pos == fdctrl->data_len) { - cur_drv = get_cur_drv(fdctrl); - if (bdrv_write(cur_drv->bs, fd_sector(cur_drv), fdctrl->fifo, 1) < 0) { - FLOPPY_DPRINTF("error writing sector %d\n", - fd_sector(cur_drv)); - return; - } - if (!fdctrl_seek_to_next_sect(fdctrl, cur_drv)) { - FLOPPY_DPRINTF("error seeking to next sector %d\n", - fd_sector(cur_drv)); - return; - } - } - /* Switch from transfer mode to status mode - * then from status mode to command mode - */ - if (fdctrl->data_pos == fdctrl->data_len) - fdctrl_stop_transfer(fdctrl, 0x00, 0x00, 0x00); - return; - } - if (fdctrl->data_pos == 0) { - /* Command */ - pos = command_to_handler[value & 0xff]; - FLOPPY_DPRINTF("%s command\n", handlers[pos].name); - fdctrl->data_len = handlers[pos].parameters + 1; - fdctrl->msr |= FD_MSR_CMDBUSY; - } - - FLOPPY_DPRINTF("%s: %02x\n", __func__, value); - fdctrl->fifo[fdctrl->data_pos++] = value; - if (fdctrl->data_pos == fdctrl->data_len) { - /* We now have all parameters - * and will be able to treat the command - */ - if (fdctrl->data_state & FD_STATE_FORMAT) { - fdctrl_format_sector(fdctrl); - return; - } - - pos = command_to_handler[fdctrl->fifo[0] & 0xff]; - FLOPPY_DPRINTF("treat %s command\n", handlers[pos].name); - (*handlers[pos].handler)(fdctrl, handlers[pos].direction); - } -} - -static void fdctrl_result_timer(void *opaque) -{ - FDCtrl *fdctrl = opaque; - FDrive *cur_drv = get_cur_drv(fdctrl); - - /* Pretend we are spinning. - * This is needed for Coherent, which uses READ ID to check for - * sector interleaving. - */ - if (cur_drv->last_sect != 0) { - cur_drv->sect = (cur_drv->sect % cur_drv->last_sect) + 1; - } - /* READ_ID can't automatically succeed! */ - if (fdctrl->check_media_rate && - (fdctrl->dsr & FD_DSR_DRATEMASK) != cur_drv->media_rate) { - FLOPPY_DPRINTF("read id rate mismatch (fdc=%d, media=%d)\n", - fdctrl->dsr & FD_DSR_DRATEMASK, cur_drv->media_rate); - fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, FD_SR1_MA, 0x00); - } else { - fdctrl_stop_transfer(fdctrl, 0x00, 0x00, 0x00); - } -} - -static void fdctrl_change_cb(void *opaque, bool load) -{ - FDrive *drive = opaque; - - drive->media_changed = 1; - fd_revalidate(drive); -} - -static const BlockDevOps fdctrl_block_ops = { - .change_media_cb = fdctrl_change_cb, -}; - -/* Init functions */ -static int fdctrl_connect_drives(FDCtrl *fdctrl) -{ - unsigned int i; - FDrive *drive; - - for (i = 0; i < MAX_FD; i++) { - drive = &fdctrl->drives[i]; - drive->fdctrl = fdctrl; - - if (drive->bs) { - if (bdrv_get_on_error(drive->bs, 0) != BLOCKDEV_ON_ERROR_ENOSPC) { - error_report("fdc doesn't support drive option werror"); - return -1; - } - if (bdrv_get_on_error(drive->bs, 1) != BLOCKDEV_ON_ERROR_REPORT) { - error_report("fdc doesn't support drive option rerror"); - return -1; - } - } - - fd_init(drive); - fdctrl_change_cb(drive, 0); - if (drive->bs) { - bdrv_set_dev_ops(drive->bs, &fdctrl_block_ops, drive); - } - } - return 0; -} - -ISADevice *fdctrl_init_isa(ISABus *bus, DriveInfo **fds) -{ - ISADevice *dev; - - dev = isa_try_create(bus, "isa-fdc"); - if (!dev) { - return NULL; - } - - if (fds[0]) { - qdev_prop_set_drive_nofail(&dev->qdev, "driveA", fds[0]->bdrv); - } - if (fds[1]) { - qdev_prop_set_drive_nofail(&dev->qdev, "driveB", fds[1]->bdrv); - } - qdev_init_nofail(&dev->qdev); - - return dev; -} - -void fdctrl_init_sysbus(qemu_irq irq, int dma_chann, - hwaddr mmio_base, DriveInfo **fds) -{ - FDCtrl *fdctrl; - DeviceState *dev; - FDCtrlSysBus *sys; - - dev = qdev_create(NULL, "sysbus-fdc"); - sys = DO_UPCAST(FDCtrlSysBus, busdev.qdev, dev); - fdctrl = &sys->state; - fdctrl->dma_chann = dma_chann; /* FIXME */ - if (fds[0]) { - qdev_prop_set_drive_nofail(dev, "driveA", fds[0]->bdrv); - } - if (fds[1]) { - qdev_prop_set_drive_nofail(dev, "driveB", fds[1]->bdrv); - } - qdev_init_nofail(dev); - sysbus_connect_irq(&sys->busdev, 0, irq); - sysbus_mmio_map(&sys->busdev, 0, mmio_base); -} - -void sun4m_fdctrl_init(qemu_irq irq, hwaddr io_base, - DriveInfo **fds, qemu_irq *fdc_tc) -{ - DeviceState *dev; - FDCtrlSysBus *sys; - - dev = qdev_create(NULL, "SUNW,fdtwo"); - if (fds[0]) { - qdev_prop_set_drive_nofail(dev, "drive", fds[0]->bdrv); - } - qdev_init_nofail(dev); - sys = DO_UPCAST(FDCtrlSysBus, busdev.qdev, dev); - sysbus_connect_irq(&sys->busdev, 0, irq); - sysbus_mmio_map(&sys->busdev, 0, io_base); - *fdc_tc = qdev_get_gpio_in(dev, 0); -} - -static int fdctrl_init_common(FDCtrl *fdctrl) -{ - int i, j; - static int command_tables_inited = 0; - - /* Fill 'command_to_handler' lookup table */ - if (!command_tables_inited) { - command_tables_inited = 1; - for (i = ARRAY_SIZE(handlers) - 1; i >= 0; i--) { - for (j = 0; j < sizeof(command_to_handler); j++) { - if ((j & handlers[i].mask) == handlers[i].value) { - command_to_handler[j] = i; - } - } - } - } - - FLOPPY_DPRINTF("init controller\n"); - fdctrl->fifo = qemu_memalign(512, FD_SECTOR_LEN); - fdctrl->fifo_size = 512; - fdctrl->result_timer = qemu_new_timer_ns(vm_clock, - fdctrl_result_timer, fdctrl); - - fdctrl->version = 0x90; /* Intel 82078 controller */ - fdctrl->config = FD_CONFIG_EIS | FD_CONFIG_EFIFO; /* Implicit seek, polling & FIFO enabled */ - fdctrl->num_floppies = MAX_FD; - - if (fdctrl->dma_chann != -1) - DMA_register_channel(fdctrl->dma_chann, &fdctrl_transfer_handler, fdctrl); - return fdctrl_connect_drives(fdctrl); -} - -static const MemoryRegionPortio fdc_portio_list[] = { - { 1, 5, 1, .read = fdctrl_read, .write = fdctrl_write }, - { 7, 1, 1, .read = fdctrl_read, .write = fdctrl_write }, - PORTIO_END_OF_LIST(), -}; - -static int isabus_fdc_init1(ISADevice *dev) -{ - FDCtrlISABus *isa = DO_UPCAST(FDCtrlISABus, busdev, dev); - FDCtrl *fdctrl = &isa->state; - int ret; - - isa_register_portio_list(dev, isa->iobase, fdc_portio_list, fdctrl, "fdc"); - - isa_init_irq(&isa->busdev, &fdctrl->irq, isa->irq); - fdctrl->dma_chann = isa->dma; - - qdev_set_legacy_instance_id(&dev->qdev, isa->iobase, 2); - ret = fdctrl_init_common(fdctrl); - - add_boot_device_path(isa->bootindexA, &dev->qdev, "/floppy@0"); - add_boot_device_path(isa->bootindexB, &dev->qdev, "/floppy@1"); - - return ret; -} - -static int sysbus_fdc_init1(SysBusDevice *dev) -{ - FDCtrlSysBus *sys = DO_UPCAST(FDCtrlSysBus, busdev, dev); - FDCtrl *fdctrl = &sys->state; - int ret; - - memory_region_init_io(&fdctrl->iomem, &fdctrl_mem_ops, fdctrl, "fdc", 0x08); - sysbus_init_mmio(dev, &fdctrl->iomem); - sysbus_init_irq(dev, &fdctrl->irq); - qdev_init_gpio_in(&dev->qdev, fdctrl_handle_tc, 1); - fdctrl->dma_chann = -1; - - qdev_set_legacy_instance_id(&dev->qdev, 0 /* io */, 2); /* FIXME */ - ret = fdctrl_init_common(fdctrl); - - return ret; -} - -static int sun4m_fdc_init1(SysBusDevice *dev) -{ - FDCtrl *fdctrl = &(FROM_SYSBUS(FDCtrlSysBus, dev)->state); - - memory_region_init_io(&fdctrl->iomem, &fdctrl_mem_strict_ops, fdctrl, - "fdctrl", 0x08); - sysbus_init_mmio(dev, &fdctrl->iomem); - sysbus_init_irq(dev, &fdctrl->irq); - qdev_init_gpio_in(&dev->qdev, fdctrl_handle_tc, 1); - - fdctrl->sun4m = 1; - qdev_set_legacy_instance_id(&dev->qdev, 0 /* io */, 2); /* FIXME */ - return fdctrl_init_common(fdctrl); -} - -FDriveType isa_fdc_get_drive_type(ISADevice *fdc, int i) -{ - FDCtrlISABus *isa = DO_UPCAST(FDCtrlISABus, busdev, fdc); - - return isa->state.drives[i].drive; -} - -static const VMStateDescription vmstate_isa_fdc ={ - .name = "fdc", - .version_id = 2, - .minimum_version_id = 2, - .fields = (VMStateField []) { - VMSTATE_STRUCT(state, FDCtrlISABus, 0, vmstate_fdc, FDCtrl), - VMSTATE_END_OF_LIST() - } -}; - -static Property isa_fdc_properties[] = { - DEFINE_PROP_HEX32("iobase", FDCtrlISABus, iobase, 0x3f0), - DEFINE_PROP_UINT32("irq", FDCtrlISABus, irq, 6), - DEFINE_PROP_UINT32("dma", FDCtrlISABus, dma, 2), - DEFINE_PROP_DRIVE("driveA", FDCtrlISABus, state.drives[0].bs), - DEFINE_PROP_DRIVE("driveB", FDCtrlISABus, state.drives[1].bs), - DEFINE_PROP_INT32("bootindexA", FDCtrlISABus, bootindexA, -1), - DEFINE_PROP_INT32("bootindexB", FDCtrlISABus, bootindexB, -1), - DEFINE_PROP_BIT("check_media_rate", FDCtrlISABus, state.check_media_rate, - 0, true), - DEFINE_PROP_END_OF_LIST(), -}; - -static void isabus_fdc_class_init1(ObjectClass *klass, void *data) -{ - DeviceClass *dc = DEVICE_CLASS(klass); - ISADeviceClass *ic = ISA_DEVICE_CLASS(klass); - ic->init = isabus_fdc_init1; - dc->fw_name = "fdc"; - dc->no_user = 1; - dc->reset = fdctrl_external_reset_isa; - dc->vmsd = &vmstate_isa_fdc; - dc->props = isa_fdc_properties; -} - -static const TypeInfo isa_fdc_info = { - .name = "isa-fdc", - .parent = TYPE_ISA_DEVICE, - .instance_size = sizeof(FDCtrlISABus), - .class_init = isabus_fdc_class_init1, -}; - -static const VMStateDescription vmstate_sysbus_fdc ={ - .name = "fdc", - .version_id = 2, - .minimum_version_id = 2, - .fields = (VMStateField []) { - VMSTATE_STRUCT(state, FDCtrlSysBus, 0, vmstate_fdc, FDCtrl), - VMSTATE_END_OF_LIST() - } -}; - -static Property sysbus_fdc_properties[] = { - DEFINE_PROP_DRIVE("driveA", FDCtrlSysBus, state.drives[0].bs), - DEFINE_PROP_DRIVE("driveB", FDCtrlSysBus, state.drives[1].bs), - DEFINE_PROP_END_OF_LIST(), -}; - -static void sysbus_fdc_class_init(ObjectClass *klass, void *data) -{ - DeviceClass *dc = DEVICE_CLASS(klass); - SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass); - - k->init = sysbus_fdc_init1; - dc->reset = fdctrl_external_reset_sysbus; - dc->vmsd = &vmstate_sysbus_fdc; - dc->props = sysbus_fdc_properties; -} - -static const TypeInfo sysbus_fdc_info = { - .name = "sysbus-fdc", - .parent = TYPE_SYS_BUS_DEVICE, - .instance_size = sizeof(FDCtrlSysBus), - .class_init = sysbus_fdc_class_init, -}; - -static Property sun4m_fdc_properties[] = { - DEFINE_PROP_DRIVE("drive", FDCtrlSysBus, state.drives[0].bs), - DEFINE_PROP_END_OF_LIST(), -}; - -static void sun4m_fdc_class_init(ObjectClass *klass, void *data) -{ - DeviceClass *dc = DEVICE_CLASS(klass); - SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass); - - k->init = sun4m_fdc_init1; - dc->reset = fdctrl_external_reset_sysbus; - dc->vmsd = &vmstate_sysbus_fdc; - dc->props = sun4m_fdc_properties; -} - -static const TypeInfo sun4m_fdc_info = { - .name = "SUNW,fdtwo", - .parent = TYPE_SYS_BUS_DEVICE, - .instance_size = sizeof(FDCtrlSysBus), - .class_init = sun4m_fdc_class_init, -}; - -static void fdc_register_types(void) -{ - type_register_static(&isa_fdc_info); - type_register_static(&sysbus_fdc_info); - type_register_static(&sun4m_fdc_info); -} - -type_init(fdc_register_types) |