| /* |
| * QEMU Floppy disk emulator (Intel 82078) |
| * |
| * Copyright (c) 2003, 2007 Jocelyn Mayer |
| * Copyright (c) 2008 Hervé Poussineau |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a copy |
| * of this software and associated documentation files (the "Software"), to deal |
| * in the Software without restriction, including without limitation the rights |
| * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| * copies of the Software, and to permit persons to whom the Software is |
| * furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be included in |
| * all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| * THE SOFTWARE. |
| */ |
| /* |
| * The controller is used in Sun4m systems in a slightly different |
| * way. There are changes in DOR register and DMA is not available. |
| */ |
| |
| #include "hw.h" |
| #include "fdc.h" |
| #include "qemu-error.h" |
| #include "qemu-timer.h" |
| #include "isa.h" |
| #include "sysbus.h" |
| #include "qdev-addr.h" |
| #include "blockdev.h" |
| #include "sysemu.h" |
| |
| /********************************************************/ |
| /* 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 |
| |
| #define FLOPPY_ERROR(fmt, ...) \ |
| do { printf("FLOPPY ERROR: %s: " fmt, __func__ , ## __VA_ARGS__); } while (0) |
| |
| /********************************************************/ |
| /* Floppy drive emulation */ |
| |
| #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 */ |
| |
| /* Floppy disk drive emulation */ |
| typedef enum FDiskFlags { |
| FDISK_DBL_SIDES = 0x01, |
| } FDiskFlags; |
| |
| typedef struct FDrive { |
| 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 */ |
| } 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; |
| } |
| |
| static int fd_sector_calc(uint8_t head, uint8_t track, uint8_t sect, |
| uint8_t last_sect) |
| { |
| return (((track * 2) + head) * last_sect) + sect - 1; |
| } |
| |
| /* Returns current position, in sectors, for given drive */ |
| static int fd_sector(FDrive *drv) |
| { |
| return fd_sector_calc(drv->head, drv->track, drv->sect, drv->last_sect); |
| } |
| |
| /* 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); |
| ret = 0; |
| if (sector != fd_sector(drv)) { |
| #if 0 |
| if (!enable_seek) { |
| FLOPPY_ERROR("no implicit seek %d %02x %02x (max=%d %02x %02x)\n", |
| head, track, sect, 1, drv->max_track, drv->last_sect); |
| return 4; |
| } |
| #endif |
| drv->head = head; |
| if (drv->track != track) |
| ret = 1; |
| drv->track = track; |
| drv->sect = sect; |
| } |
| |
| return ret; |
| } |
| |
| /* Set drive back to track 0 */ |
| static void fd_recalibrate(FDrive *drv) |
| { |
| FLOPPY_DPRINTF("recalibrate\n"); |
| drv->head = 0; |
| drv->track = 0; |
| drv->sect = 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; |
| |
| FLOPPY_DPRINTF("revalidate\n"); |
| if (drv->bs != NULL && bdrv_is_inserted(drv->bs)) { |
| 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); |
| } 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; |
| } else { |
| FLOPPY_DPRINTF("No disk in drive\n"); |
| drv->last_sect = 0; |
| drv->max_track = 0; |
| drv->flags &= ~FDISK_DBL_SIDES; |
| } |
| } |
| |
| /********************************************************/ |
| /* 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 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); |
| |
| enum { |
| FD_DIR_WRITE = 0, |
| FD_DIR_READ = 1, |
| FD_DIR_SCANE = 2, |
| FD_DIR_SCANL = 3, |
| FD_DIR_SCANH = 4, |
| }; |
| |
| enum { |
| FD_STATE_MULTI = 0x01, /* multi track flag */ |
| FD_STATE_FORMAT = 0x02, /* format flag */ |
| FD_STATE_SEEK = 0x04, /* seek flag */ |
| }; |
| |
| enum { |
| FD_REG_SRA = 0x00, |
| FD_REG_SRB = 0x01, |
| FD_REG_DOR = 0x02, |
| FD_REG_TDR = 0x03, |
| FD_REG_MSR = 0x04, |
| FD_REG_DSR = 0x04, |
| FD_REG_FIFO = 0x05, |
| FD_REG_DIR = 0x07, |
| }; |
| |
| 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_EQPMT = 0x10, |
| FD_SR0_SEEK = 0x20, |
| FD_SR0_ABNTERM = 0x40, |
| FD_SR0_INVCMD = 0x80, |
| FD_SR0_RDYCHG = 0xc0, |
| }; |
| |
| enum { |
| FD_SR1_EC = 0x80, /* End of cylinder */ |
| }; |
| |
| enum { |
| FD_SR2_SNS = 0x04, /* Scan not satisfied */ |
| FD_SR2_SEH = 0x08, /* Scan equal hit */ |
| }; |
| |
| enum { |
| FD_SRA_DIR = 0x01, |
| FD_SRA_nWP = 0x02, |
| FD_SRA_nINDX = 0x04, |
| FD_SRA_HDSEL = 0x08, |
| FD_SRA_nTRK0 = 0x10, |
| FD_SRA_STEP = 0x20, |
| FD_SRA_nDRV2 = 0x40, |
| FD_SRA_INTPEND = 0x80, |
| }; |
| |
| enum { |
| FD_SRB_MTR0 = 0x01, |
| FD_SRB_MTR1 = 0x02, |
| FD_SRB_WGATE = 0x04, |
| FD_SRB_RDATA = 0x08, |
| FD_SRB_WDATA = 0x10, |
| FD_SRB_DR0 = 0x20, |
| }; |
| |
| enum { |
| #if MAX_FD == 4 |
| FD_DOR_SELMASK = 0x03, |
| #else |
| FD_DOR_SELMASK = 0x01, |
| #endif |
| FD_DOR_nRESET = 0x04, |
| FD_DOR_DMAEN = 0x08, |
| FD_DOR_MOTEN0 = 0x10, |
| FD_DOR_MOTEN1 = 0x20, |
| FD_DOR_MOTEN2 = 0x40, |
| FD_DOR_MOTEN3 = 0x80, |
| }; |
| |
| enum { |
| #if MAX_FD == 4 |
| FD_TDR_BOOTSEL = 0x0c, |
| #else |
| FD_TDR_BOOTSEL = 0x04, |
| #endif |
| }; |
| |
| enum { |
| FD_DSR_DRATEMASK= 0x03, |
| FD_DSR_PWRDOWN = 0x40, |
| FD_DSR_SWRESET = 0x80, |
| }; |
| |
| enum { |
| FD_MSR_DRV0BUSY = 0x01, |
| FD_MSR_DRV1BUSY = 0x02, |
| FD_MSR_DRV2BUSY = 0x04, |
| FD_MSR_DRV3BUSY = 0x08, |
| FD_MSR_CMDBUSY = 0x10, |
| FD_MSR_NONDMA = 0x20, |
| FD_MSR_DIO = 0x40, |
| FD_MSR_RQM = 0x80, |
| }; |
| |
| enum { |
| FD_DIR_DSKCHG = 0x80, |
| }; |
| |
| #define FD_MULTI_TRACK(state) ((state) & FD_STATE_MULTI) |
| #define FD_DID_SEEK(state) ((state) & FD_STATE_SEEK) |
| #define FD_FORMAT_CMD(state) ((state) & FD_STATE_FORMAT) |
| |
| struct FDCtrl { |
| MemoryRegion iomem; |
| qemu_irq irq; |
| /* Controller state */ |
| QEMUTimer *result_timer; |
| int dma_chann; |
| /* Controller's identification */ |
| uint8_t version; |
| /* HW */ |
| uint8_t sra; |
| uint8_t srb; |
| uint8_t dor; |
| uint8_t dor_vmstate; /* only used as temp during vmstate */ |
| uint8_t tdr; |
| uint8_t dsr; |
| uint8_t msr; |
| uint8_t cur_drv; |
| uint8_t status0; |
| uint8_t status1; |
| uint8_t status2; |
| /* Command FIFO */ |
| uint8_t *fifo; |
| int32_t fifo_size; |
| uint32_t data_pos; |
| uint32_t data_len; |
| uint8_t data_state; |
| uint8_t data_dir; |
| uint8_t eot; /* last wanted sector */ |
| /* States kept only to be returned back */ |
| /* precompensation */ |
| uint8_t precomp_trk; |
| uint8_t config; |
| uint8_t lock; |
| /* Power down config (also with status regB access mode */ |
| uint8_t pwrd; |
| /* Floppy drives */ |
| uint8_t num_floppies; |
| /* Sun4m quirks? */ |
| int sun4m; |
| FDrive drives[MAX_FD]; |
| int reset_sensei; |
| /* Timers state */ |
| uint8_t timer0; |
| uint8_t timer1; |
| }; |
| |
| typedef struct FDCtrlSysBus { |
| SysBusDevice busdev; |
| struct FDCtrl state; |
| } FDCtrlSysBus; |
| |
| typedef struct FDCtrlISABus { |
| ISADevice busdev; |
| 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; |
| default: |
| break; |
| } |
| } |
| |
| static uint64_t fdctrl_read_mem (void *opaque, target_phys_addr_t reg, |
| unsigned ize) |
| { |
| return fdctrl_read(opaque, (uint32_t)reg); |
| } |
| |
| static void fdctrl_write_mem (void *opaque, target_phys_addr_t 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 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, |
| } , { |
| /* 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) |
| { |
| 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, uint8_t status0) |
| { |
| /* 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; |
| fdctrl->status0 = status0; |
| return; |
| } |
| if (!(fdctrl->sra & FD_SRA_INTPEND)) { |
| 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); |
| } |
| |
| /* 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_raise_irq(fdctrl, FD_SR0_RDYCHG); |
| 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; |
| } |
| |
| static int fdctrl_media_changed(FDrive *drv) |
| { |
| 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); |
| } |
| return ret; |
| } |
| |
| /* Digital input register : 0x07 (read-only) */ |
| 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 |
| ) |
| 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, int do_irq) |
| { |
| 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); |
| } |
| |
| /* Set an error: unimplemented/unknown command */ |
| static void fdctrl_unimplemented(FDCtrl *fdctrl, int direction) |
| { |
| FLOPPY_ERROR("unimplemented command 0x%02x\n", fdctrl->fifo[0]); |
| fdctrl->fifo[0] = FD_SR0_INVCMD; |
| fdctrl_set_fifo(fdctrl, 1, 0); |
| } |
| |
| /* Seek to next sector */ |
| 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 */ |
| if (cur_drv->sect >= cur_drv->last_sect || |
| cur_drv->sect == fdctrl->eot) { |
| cur_drv->sect = 1; |
| if (FD_MULTI_TRACK(fdctrl->data_state)) { |
| if (cur_drv->head == 0 && |
| (cur_drv->flags & FDISK_DBL_SIDES) != 0) { |
| cur_drv->head = 1; |
| } else { |
| cur_drv->head = 0; |
| cur_drv->track++; |
| if ((cur_drv->flags & FDISK_DBL_SIDES) == 0) |
| return 0; |
| } |
| } else { |
| cur_drv->track++; |
| return 0; |
| } |
| 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++; |
| } |
| return 1; |
| } |
| |
| /* 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); |
| 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); |
| 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, 1); |
| } |
| |
| /* Prepare a data transfer (either DMA or FIFO) */ |
| static void fdctrl_start_transfer(FDCtrl *fdctrl, int direction) |
| { |
| FDrive *cur_drv; |
| uint8_t kh, kt, ks; |
| int did_seek = 0; |
| |
| SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK); |
| cur_drv = get_cur_drv(fdctrl); |
| kt = fdctrl->fifo[2]; |
| kh = fdctrl->fifo[3]; |
| ks = fdctrl->fifo[4]; |
| FLOPPY_DPRINTF("Start transfer at %d %d %02x %02x (%d)\n", |
| GET_CUR_DRV(fdctrl), kh, kt, ks, |
| fd_sector_calc(kh, kt, ks, cur_drv->last_sect)); |
| switch (fd_seek(cur_drv, kh, kt, ks, fdctrl->config & FD_CONFIG_EIS)) { |
| case 2: |
| /* sect too big */ |
| fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, 0x00, 0x00); |
| fdctrl->fifo[3] = kt; |
| fdctrl->fifo[4] = kh; |
| fdctrl->fifo[5] = ks; |
| return; |
| case 3: |
| /* track too big */ |
| fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, FD_SR1_EC, 0x00); |
| fdctrl->fifo[3] = kt; |
| fdctrl->fifo[4] = kh; |
| fdctrl->fifo[5] = ks; |
| return; |
| case 4: |
| /* No seek enabled */ |
| fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, 0x00, 0x00); |
| fdctrl->fifo[3] = kt; |
| fdctrl->fifo[4] = kh; |
| fdctrl->fifo[5] = ks; |
| return; |
| case 1: |
| did_seek = 1; |
| break; |
| default: |
| break; |
| } |
| |
| /* Set the FIFO state */ |
| fdctrl->data_dir = direction; |
| fdctrl->data_pos = 0; |
| fdctrl->msr |= FD_MSR_CMDBUSY; |
| if (fdctrl->fifo[0] & 0x80) |
| fdctrl->data_state |= FD_STATE_MULTI; |
| else |
| fdctrl->data_state &= ~FD_STATE_MULTI; |
| if (did_seek) |
| fdctrl->data_state |= FD_STATE_SEEK; |
| else |
| fdctrl->data_state &= ~FD_STATE_SEEK; |
| if (fdctrl->fifo[5] == 00) { |
| fdctrl->data_len = fdctrl->fifo[8]; |
| } else { |
| int tmp; |
| fdctrl->data_len = 128 << (fdctrl->fifo[5] > 7 ? 7 : fdctrl->fifo[5]); |
| tmp = (fdctrl->fifo[6] - ks + 1); |
| if (fdctrl->fifo[0] & 0x80) |
| tmp += fdctrl->fifo[6]; |
| fdctrl->data_len *= tmp; |
| } |
| fdctrl->eot = fdctrl->fifo[6]; |
| if (fdctrl->dor & FD_DOR_DMAEN) { |
| int dma_mode; |
| /* DMA transfer are enabled. Check if DMA channel is well programmed */ |
| dma_mode = DMA_get_channel_mode(fdctrl->dma_chann); |
| dma_mode = (dma_mode >> 2) & 3; |
| FLOPPY_DPRINTF("dma_mode=%d direction=%d (%d - %d)\n", |
| dma_mode, direction, |
| (128 << fdctrl->fifo[5]) * |
| (cur_drv->last_sect - ks + 1), fdctrl->data_len); |
| if (((direction == FD_DIR_SCANE || direction == FD_DIR_SCANL || |
| direction == FD_DIR_SCANH) && dma_mode == 0) || |
| (direction == FD_DIR_WRITE && dma_mode == 2) || |
| (direction == FD_DIR_READ && dma_mode == 1)) { |
| /* No access is allowed until DMA transfer has completed */ |
| fdctrl->msr &= ~FD_MSR_RQM; |
| /* Now, we just have to wait for the DMA controller to |
| * recall us... |
| */ |
| DMA_hold_DREQ(fdctrl->dma_chann); |
| DMA_schedule(fdctrl->dma_chann); |
| return; |
| } else { |
| FLOPPY_ERROR("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, 0x00); |
| |
| return; |
| } |
| |
| /* Prepare a transfer of deleted data */ |
| static void fdctrl_start_transfer_del(FDCtrl *fdctrl, int direction) |
| { |
| FLOPPY_ERROR("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 */ |
| 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)); |
| fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM | FD_SR0_SEEK, 0x00, 0x00); |
| goto transfer_error; |
| } |
| break; |
| default: |
| /* SCAN commands */ |
| { |
| uint8_t tmpbuf[FD_SECTOR_LEN]; |
| int ret; |
| DMA_read_memory (nchan, tmpbuf, fdctrl->data_pos, len); |
| ret = memcmp(tmpbuf, fdctrl->fifo + rel_pos, len); |
| if (ret == 0) { |
| status2 = FD_SR2_SEH; |
| goto end_transfer; |
| } |
| if ((ret < 0 && fdctrl->data_dir == FD_DIR_SCANL) || |
| (ret > 0 && fdctrl->data_dir == FD_DIR_SCANH)) { |
| status2 = 0x00; |
| goto end_transfer; |
| } |
| } |
| break; |
| } |
| fdctrl->data_pos += len; |
| rel_pos = fdctrl->data_pos % FD_SECTOR_LEN; |
| if (rel_pos == 0) { |
| /* Seek to next sector */ |
| if (!fdctrl_seek_to_next_sect(fdctrl, cur_drv)) |
| break; |
| } |
| } |
| end_transfer: |
| len = fdctrl->data_pos - start_pos; |
| FLOPPY_DPRINTF("end transfer %d %d %d\n", |
| fdctrl->data_pos, len, fdctrl->data_len); |
| if (fdctrl->data_dir == FD_DIR_SCANE || |
| fdctrl->data_dir == FD_DIR_SCANL || |
| fdctrl->data_dir == FD_DIR_SCANH) |
| status2 = FD_SR2_SEH; |
| if (FD_DID_SEEK(fdctrl->data_state)) |
| status0 |= FD_SR0_SEEK; |
| fdctrl->data_len -= len; |
| fdctrl_stop_transfer(fdctrl, status0, status1, status2); |
| transfer_error: |
| |
| return len; |
| } |
| |
| /* Data register : 0x05 */ |
| static uint32_t fdctrl_read_data(FDCtrl *fdctrl) |
| { |
| FDrive *cur_drv; |
| uint32_t retval = 0; |
| int pos; |
| |
| cur_drv = get_cur_drv(fdctrl); |
| fdctrl->dsr &= ~FD_DSR_PWRDOWN; |
| if (!(fdctrl->msr & FD_MSR_RQM) || !(fdctrl->msr & FD_MSR_DIO)) { |
| FLOPPY_ERROR("controller not ready for reading\n"); |
| return 0; |
| } |
| pos = fdctrl->data_pos; |
| if (fdctrl->msr & FD_MSR_NONDMA) { |
| pos %= FD_SECTOR_LEN; |
| if (pos == 0) { |
| if (fdctrl->data_pos != 0) |
| if (!fdctrl_seek_to_next_sect(fdctrl, cur_drv)) { |
| FLOPPY_DPRINTF("error seeking to next sector %d\n", |
| fd_sector(cur_drv)); |
| return 0; |
| } |
| if (bdrv_read(cur_drv->bs, fd_sector(cur_drv), fdctrl->fifo, 1) < 0) { |
| FLOPPY_DPRINTF("error getting sector %d\n", |
| fd_sector(cur_drv)); |
| /* Sure, image size is too small... */ |
| memset(fdctrl->fifo, 0, FD_SECTOR_LEN); |
| } |
| } |
| } |
| retval = fdctrl->fifo[pos]; |
| if (++fdctrl->data_pos == fdctrl->data_len) { |
| fdctrl->data_pos = 0; |
| /* Switch from transfer mode to status mode |
| * then from status mode to command mode |
| */ |
| if (fdctrl->msr & FD_MSR_NONDMA) { |
| fdctrl_stop_transfer(fdctrl, FD_SR0_SEEK, 0x00, 0x00); |
| } else { |
| fdctrl_reset_fifo(fdctrl); |
| fdctrl_reset_irq(fdctrl); |
| } |
| } |
| FLOPPY_DPRINTF("data register: 0x%02x\n", retval); |
| |
| return retval; |
| } |
| |
| static void fdctrl_format_sector(FDCtrl *fdctrl) |
| { |
| FDrive *cur_drv; |
| uint8_t kh, kt, ks; |
| |
| SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK); |
| cur_drv = get_cur_drv(fdctrl); |
| kt = fdctrl->fifo[6]; |
| kh = fdctrl->fifo[7]; |
| ks = fdctrl->fifo[8]; |
| FLOPPY_DPRINTF("format sector at %d %d %02x %02x (%d)\n", |
| GET_CUR_DRV(fdctrl), kh, kt, ks, |
| fd_sector_calc(kh, kt, ks, cur_drv->last_sect)); |
| switch (fd_seek(cur_drv, kh, kt, ks, fdctrl->config & FD_CONFIG_EIS)) { |
| case 2: |
| /* sect too big */ |
| fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, 0x00, 0x00); |
| fdctrl->fifo[3] = kt; |
| fdctrl->fifo[4] = kh; |
| fdctrl->fifo[5] = ks; |
| return; |
| case 3: |
| /* track too big */ |
| fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, FD_SR1_EC, 0x00); |
| fdctrl->fifo[3] = kt; |
| fdctrl->fifo[4] = kh; |
| fdctrl->fifo[5] = ks; |
| return; |
| case 4: |
| /* No seek enabled */ |
| fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, 0x00, 0x00); |
| fdctrl->fifo[3] = kt; |
| fdctrl->fifo[4] = kh; |
| fdctrl->fifo[5] = ks; |
| return; |
| case 1: |
| fdctrl->data_state |= FD_STATE_SEEK; |
| break; |
| default: |
| break; |
| } |
| memset(fdctrl->fifo, 0, FD_SECTOR_LEN); |
| if (cur_drv->bs == NULL || |
| bdrv_write(cur_drv->bs, fd_sector(cur_drv), fdctrl->fifo, 1) < 0) { |
| FLOPPY_ERROR("formatting sector %d\n", fd_sector(cur_drv)); |
| fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM | FD_SR0_SEEK, 0x00, 0x00); |
| } else { |
| if (cur_drv->sect == cur_drv->last_sect) { |
| fdctrl->data_state &= ~FD_STATE_FORMAT; |
| /* Last sector done */ |
| if (FD_DID_SEEK(fdctrl->data_state)) |
| fdctrl_stop_transfer(fdctrl, FD_SR0_SEEK, 0x00, 0x00); |
| else |
| fdctrl_stop_transfer(fdctrl, 0x00, 0x00, 0x00); |
| } else { |
| /* More to do */ |
| fdctrl->data_pos = 0; |
| fdctrl->data_len = 4; |
| } |
| } |
| } |
| |
| static void fdctrl_handle_lock(FDCtrl *fdctrl, int direction) |
| { |
| fdctrl->lock = (fdctrl->fifo[0] & 0x80) ? 1 : 0; |
| fdctrl->fifo[0] = fdctrl->lock << 4; |
| fdctrl_set_fifo(fdctrl, 1, fdctrl->lock); |
| } |
| |
| 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, 0); |
| } |
| |
| static void fdctrl_handle_version(FDCtrl *fdctrl, int direction) |
| { |
| /* Controller's version */ |
| fdctrl->fifo[0] = fdctrl->version; |
| fdctrl_set_fifo(fdctrl, 1, 1); |
| } |
| |
| static void fdctrl_handle_partid(FDCtrl *fdctrl, int direction) |
| { |
| fdctrl->fifo[0] = 0x41; /* Stepping 1 */ |
| fdctrl_set_fifo(fdctrl, 1, 0); |
| } |
| |
| 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, 1); |
| } |
| |
| 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)); |
| } |
| |
| static void fdctrl_handle_format_track(FDCtrl *fdctrl, int direction) |
| { |
| FDrive *cur_drv; |
| |
| SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK); |
| cur_drv = get_cur_drv(fdctrl); |
| fdctrl->data_state |= FD_STATE_FORMAT; |
| if (fdctrl->fifo[0] & 0x80) |
| fdctrl->data_state |= FD_STATE_MULTI; |
| else |
| fdctrl->data_state &= ~FD_STATE_MULTI; |
| fdctrl->data_state &= ~FD_STATE_SEEK; |
| cur_drv->bps = |
| fdctrl->fifo[2] > 7 ? 16384 : 128 << fdctrl->fifo[2]; |
| #if 0 |
| cur_drv->last_sect = |
| cur_drv->flags & FDISK_DBL_SIDES ? fdctrl->fifo[3] : |
| fdctrl->fifo[3] / 2; |
| #else |
| cur_drv->last_sect = fdctrl->fifo[3]; |
| #endif |
| /* TODO: implement format using DMA expected by the Bochs BIOS |
| * and Linux fdformat (read 3 bytes per sector via DMA and fill |
| * the sector with the specified fill byte |
| */ |
| fdctrl->data_state &= ~FD_STATE_FORMAT; |
| fdctrl_stop_transfer(fdctrl, 0x00, 0x00, 0x00); |
| } |
| |
| static void fdctrl_handle_specify(FDCtrl *fdctrl, int direction) |
| { |
| fdctrl->timer0 = (fdctrl->fifo[1] >> 4) & 0xF; |
| fdctrl->timer1 = fdctrl->fifo[2] >> 1; |
| if (fdctrl->fifo[2] & 1) |
| fdctrl->dor &= ~FD_DOR_DMAEN; |
| else |
| fdctrl->dor |= FD_DOR_DMAEN; |
| /* No result back */ |
| fdctrl_reset_fifo(fdctrl); |
| } |
| |
| static void fdctrl_handle_sense_drive_status(FDCtrl *fdctrl, int direction) |
| { |
| FDrive *cur_drv; |
| |
| SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK); |
| cur_drv = get_cur_drv(fdctrl); |
| cur_drv->head = (fdctrl->fifo[1] >> 2) & 1; |
| /* 1 Byte status back */ |
| fdctrl->fifo[0] = (cur_drv->ro << 6) | |
| (cur_drv->track == 0 ? 0x10 : 0x00) | |
| (cur_drv->head << 2) | |
| GET_CUR_DRV(fdctrl) | |
| 0x28; |
| fdctrl_set_fifo(fdctrl, 1, 0); |
| } |
| |
| 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_raise_irq(fdctrl, FD_SR0_SEEK); |
| } |
| |
| 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 { |
| /* 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->fifo[1] = cur_drv->track; |
| fdctrl_set_fifo(fdctrl, 2, 0); |
| 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); |
| 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); |
| } |
| } |
| |
| 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, 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, 1); |
| } 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, 1); |
| } |
| } |
| |
| 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->max_track) { |
| cur_drv->track = cur_drv->max_track - 1; |
| } else { |
| cur_drv->track += fdctrl->fifo[2]; |
| } |
| fdctrl_reset_fifo(fdctrl); |
| /* Raise Interrupt */ |
| fdctrl_raise_irq(fdctrl, FD_SR0_SEEK); |
| } |
| |
| 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->track = 0; |
| } else { |
| cur_drv->track -= fdctrl->fifo[2]; |
| } |
| fdctrl_reset_fifo(fdctrl); |
| /* Raise Interrupt */ |
| fdctrl_raise_irq(fdctrl, FD_SR0_SEEK); |
| } |
| |
| static const struct { |
| uint8_t value; |
| uint8_t mask; |
| const char* name; |
| int parameters; |
| void (*handler)(FDCtrl *fdctrl, int direction); |
| int direction; |
| } handlers[] = { |
| { FD_CMD_READ, 0x1f, "READ", 8, fdctrl_start_transfer, FD_DIR_READ }, |
| { FD_CMD_WRITE, 0x3f, "WRITE", 8, fdctrl_start_transfer, FD_DIR_WRITE }, |
| { FD_CMD_SEEK, 0xff, "SEEK", 2, fdctrl_handle_seek }, |
| { FD_CMD_SENSE_INTERRUPT_STATUS, 0xff, "SENSE INTERRUPT STATUS", 0, fdctrl_handle_sense_interrupt_status }, |
| { FD_CMD_RECALIBRATE, 0xff, "RECALIBRATE", 1, fdctrl_handle_recalibrate }, |
| { FD_CMD_FORMAT_TRACK, 0xbf, "FORMAT TRACK", 5, fdctrl_handle_format_track }, |
| { FD_CMD_READ_TRACK, 0xbf, "READ TRACK", 8, fdctrl_start_transfer, FD_DIR_READ }, |
| { FD_CMD_RESTORE, 0xff, "RESTORE", 17, fdctrl_handle_restore }, /* part of READ DELETED DATA */ |
| { FD_CMD_SAVE, 0xff, "SAVE", 0, fdctrl_handle_save }, /* part of READ DELETED DATA */ |
| { FD_CMD_READ_DELETED, 0x1f, "READ DELETED DATA", 8, fdctrl_start_transfer_del, FD_DIR_READ }, |
| { FD_CMD_SCAN_EQUAL, 0x1f, "SCAN EQUAL", 8, fdctrl_start_transfer, FD_DIR_SCANE }, |
| { FD_CMD_VERIFY, 0x1f, "VERIFY", 8, fdctrl_unimplemented }, |
| { FD_CMD_SCAN_LOW_OR_EQUAL, 0x1f, "SCAN LOW OR EQUAL", 8, fdctrl_start_transfer, FD_DIR_SCANL }, |
| { FD_CMD_SCAN_HIGH_OR_EQUAL, 0x1f, "SCAN HIGH OR EQUAL", 8, fdctrl_start_transfer, FD_DIR_SCANH }, |
| { FD_CMD_WRITE_DELETED, 0x3f, "WRITE DELETED DATA", 8, fdctrl_start_transfer_del, FD_DIR_WRITE }, |
| { FD_CMD_READ_ID, 0xbf, "READ ID", 1, fdctrl_handle_readid }, |
| { FD_CMD_SPECIFY, 0xff, "SPECIFY", 2, fdctrl_handle_specify }, |
| { FD_CMD_SENSE_DRIVE_STATUS, 0xff, "SENSE DRIVE STATUS", 1, fdctrl_handle_sense_drive_status }, |
| { FD_CMD_PERPENDICULAR_MODE, 0xff, "PERPENDICULAR MODE", 1, fdctrl_handle_perpendicular_mode }, |
| { FD_CMD_CONFIGURE, 0xff, "CONFIGURE", 3, fdctrl_handle_configure }, |
| { FD_CMD_POWERDOWN_MODE, 0xff, "POWERDOWN MODE", 2, fdctrl_handle_powerdown_mode }, |
| { FD_CMD_OPTION, 0xff, "OPTION", 1, fdctrl_handle_option }, |
| { FD_CMD_DRIVE_SPECIFICATION_COMMAND, 0xff, "DRIVE SPECIFICATION COMMAND", 5, fdctrl_handle_drive_specification_command }, |
| { FD_CMD_RELATIVE_SEEK_OUT, 0xff, "RELATIVE SEEK OUT", 2, fdctrl_handle_relative_seek_out }, |
| { FD_CMD_FORMAT_AND_WRITE, 0xff, "FORMAT AND WRITE", 10, fdctrl_unimplemented }, |
| { FD_CMD_RELATIVE_SEEK_IN, 0xff, "RELATIVE SEEK IN", 2, fdctrl_handle_relative_seek_in }, |
| { FD_CMD_LOCK, 0x7f, "LOCK", 0, fdctrl_handle_lock }, |
| { FD_CMD_DUMPREG, 0xff, "DUMPREG", 0, fdctrl_handle_dumpreg }, |
| { FD_CMD_VERSION, 0xff, "VERSION", 0, fdctrl_handle_version }, |
| { FD_CMD_PART_ID, 0xff, "PART ID", 0, fdctrl_handle_partid }, |
| { FD_CMD_WRITE, 0x1f, "WRITE (BeOS)", 8, fdctrl_start_transfer, FD_DIR_WRITE }, /* not in specification ; BeOS 4.5 bug */ |
| { 0, 0, "unknown", 0, fdctrl_unimplemented }, /* default handler */ |
| }; |
| /* Associate command to an index in the 'handlers' array */ |
| static uint8_t command_to_handler[256]; |
| |
| static void fdctrl_write_data(FDCtrl *fdctrl, uint32_t value) |
| { |
| FDrive *cur_drv; |
| int pos; |
| |
| /* Reset mode */ |
| if (!(fdctrl->dor & FD_DOR_nRESET)) { |
| FLOPPY_DPRINTF("Floppy controller in RESET state !\n"); |
| return; |
| } |
| if (!(fdctrl->msr & FD_MSR_RQM) || (fdctrl->msr & FD_MSR_DIO)) { |
| FLOPPY_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_ERROR("writing sector %d\n", fd_sector(cur_drv)); |
| return; |
| } |
| if (!fdctrl_seek_to_next_sect(fdctrl, cur_drv)) { |
| FLOPPY_DPRINTF("error seeking to next sector %d\n", |
| fd_sector(cur_drv)); |
| return; |
| } |
| } |
| /* Switch from transfer mode to status mode |
| * then from status mode to command mode |
| */ |
| if (fdctrl->data_pos == fdctrl->data_len) |
| fdctrl_stop_transfer(fdctrl, FD_SR0_SEEK, 0x00, 0x00); |
| return; |
| } |
| if (fdctrl->data_pos == 0) { |
| /* Command */ |
| pos = command_to_handler[value & 0xff]; |
| FLOPPY_DPRINTF("%s command\n", handlers[pos].name); |
| fdctrl->data_len = handlers[pos].parameters + 1; |
| } |
| |
| 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; |
| } |
| fdctrl_stop_transfer(fdctrl, 0x00, 0x00, 0x00); |
| } |
| |
| static void fdctrl_change_cb(void *opaque, bool load) |
| { |
| FDrive *drive = opaque; |
| |
| drive->media_changed = 1; |
| } |
| |
| 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]; |
| |
| if (drive->bs) { |
| if (bdrv_get_on_error(drive->bs, 0) != BLOCK_ERR_STOP_ENOSPC) { |
| error_report("fdc doesn't support drive option werror"); |
| return -1; |
| } |
| if (bdrv_get_on_error(drive->bs, 1) != BLOCK_ERR_REPORT) { |
| error_report("fdc doesn't support drive option rerror"); |
| return -1; |
| } |
| } |
| |
| fd_init(drive); |
| fd_revalidate(drive); |
| if (drive->bs) { |
| drive->media_changed = 1; |
| bdrv_set_dev_ops(drive->bs, &fdctrl_block_ops, drive); |
| } |
| } |
| return 0; |
| } |
| |
| void fdctrl_init_sysbus(qemu_irq irq, int dma_chann, |
| target_phys_addr_t 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, target_phys_addr_t 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 iobase = 0x3f0; |
| int isairq = 6; |
| int dma_chann = 2; |
| int ret; |
| |
| isa_register_portio_list(dev, iobase, fdc_portio_list, fdctrl, "fdc"); |
| |
| isa_init_irq(&isa->busdev, &fdctrl->irq, isairq); |
| fdctrl->dma_chann = dma_chann; |
| |
| qdev_set_legacy_instance_id(&dev->qdev, 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); |
| } |
| |
| void fdc_get_bs(BlockDriverState *bs[], ISADevice *dev) |
| { |
| FDCtrlISABus *isa = DO_UPCAST(FDCtrlISABus, busdev, dev); |
| FDCtrl *fdctrl = &isa->state; |
| int i; |
| |
| for (i = 0; i < MAX_FD; i++) { |
| bs[i] = fdctrl->drives[i].bs; |
| } |
| } |
| |
| |
| 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 ISADeviceInfo isa_fdc_info = { |
| .init = isabus_fdc_init1, |
| .qdev.name = "isa-fdc", |
| .qdev.fw_name = "fdc", |
| .qdev.size = sizeof(FDCtrlISABus), |
| .qdev.no_user = 1, |
| .qdev.vmsd = &vmstate_isa_fdc, |
| .qdev.reset = fdctrl_external_reset_isa, |
| .qdev.props = (Property[]) { |
| 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_END_OF_LIST(), |
| }, |
| }; |
| |
| 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 SysBusDeviceInfo sysbus_fdc_info = { |
| .init = sysbus_fdc_init1, |
| .qdev.name = "sysbus-fdc", |
| .qdev.size = sizeof(FDCtrlSysBus), |
| .qdev.vmsd = &vmstate_sysbus_fdc, |
| .qdev.reset = fdctrl_external_reset_sysbus, |
| .qdev.props = (Property[]) { |
| DEFINE_PROP_DRIVE("driveA", FDCtrlSysBus, state.drives[0].bs), |
| DEFINE_PROP_DRIVE("driveB", FDCtrlSysBus, state.drives[1].bs), |
| DEFINE_PROP_END_OF_LIST(), |
| }, |
| }; |
| |
| static SysBusDeviceInfo sun4m_fdc_info = { |
| .init = sun4m_fdc_init1, |
| .qdev.name = "SUNW,fdtwo", |
| .qdev.size = sizeof(FDCtrlSysBus), |
| .qdev.vmsd = &vmstate_sysbus_fdc, |
| .qdev.reset = fdctrl_external_reset_sysbus, |
| .qdev.props = (Property[]) { |
| DEFINE_PROP_DRIVE("drive", FDCtrlSysBus, state.drives[0].bs), |
| DEFINE_PROP_END_OF_LIST(), |
| }, |
| }; |
| |
| static void fdc_register_devices(void) |
| { |
| isa_qdev_register(&isa_fdc_info); |
| sysbus_register_withprop(&sysbus_fdc_info); |
| sysbus_register_withprop(&sun4m_fdc_info); |
| } |
| |
| device_init(fdc_register_devices) |