| /* |
| * QEMU Floppy disk emulator |
| * |
| * Copyright (c) 2003 Jocelyn Mayer |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a copy |
| * of this software and associated documentation files (the "Software"), to deal |
| * in the Software without restriction, including without limitation the rights |
| * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| * copies of the Software, and to permit persons to whom the Software is |
| * furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be included in |
| * all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| * THE SOFTWARE. |
| */ |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <inttypes.h> |
| |
| #include "cpu.h" |
| #include "vl.h" |
| |
| /********************************************************/ |
| /* debug Floppy devices */ |
| //#define DEBUG_FLOPPY |
| |
| #ifdef DEBUG_FLOPPY |
| #define FLOPPY_DPRINTF(fmt, args...) \ |
| do { printf("FLOPPY: " fmt , ##args); } while (0) |
| #else |
| #define FLOPPY_DPRINTF(fmt, args...) |
| #endif |
| |
| #define FLOPPY_ERROR(fmt, args...) \ |
| do { printf("FLOPPY ERROR: %s: " fmt, __func__ , ##args); } while (0) |
| |
| /********************************************************/ |
| /* Floppy drive emulation */ |
| |
| /* Will always be a fixed parameter for us */ |
| #define FD_SECTOR_LEN 512 |
| #define FD_SECTOR_SC 2 /* Sector size code */ |
| |
| /* Floppy disk drive emulation */ |
| typedef enum fdisk_type_t { |
| FDRIVE_DISK_288 = 0x01, /* 2.88 MB disk */ |
| FDRIVE_DISK_144 = 0x02, /* 1.44 MB disk */ |
| FDRIVE_DISK_720 = 0x03, /* 720 kB disk */ |
| FDRIVE_DISK_NONE = 0x04, /* No disk */ |
| } fdisk_type_t; |
| |
| typedef enum fdrive_type_t { |
| FDRIVE_DRV_144 = 0x00, /* 1.44 MB 3"5 drive */ |
| FDRIVE_DRV_288 = 0x01, /* 2.88 MB 3"5 drive */ |
| FDRIVE_DRV_120 = 0x02, /* 1.2 MB 5"25 drive */ |
| FDRIVE_DRV_NONE = 0x03, /* No drive connected */ |
| } fdrive_type_t; |
| |
| typedef struct fdrive_t { |
| BlockDriverState *bs; |
| /* Drive status */ |
| fdrive_type_t drive; |
| uint8_t motor; /* on/off */ |
| uint8_t perpendicular; /* 2.88 MB access mode */ |
| uint8_t rv; /* Revalidated */ |
| /* Position */ |
| uint8_t head; |
| uint8_t track; |
| uint8_t sect; |
| /* Last operation status */ |
| uint8_t dir; /* Direction */ |
| uint8_t rw; /* Read/write */ |
| /* Media */ |
| fdisk_type_t disk; /* Disk type */ |
| uint8_t last_sect; /* Nb sector per track */ |
| uint8_t max_track; /* Nb of tracks */ |
| uint8_t ro; /* Is read-only */ |
| } fdrive_t; |
| |
| static void fd_init (fdrive_t *drv) |
| { |
| /* Drive */ |
| drv->bs = NULL; |
| // drv->drive = FDRIVE_DRV_288; |
| drv->drive = FDRIVE_DRV_144; |
| drv->motor = 0; |
| drv->perpendicular = 0; |
| drv->rv = 0; |
| /* Disk */ |
| drv->disk = FDRIVE_DISK_NONE; |
| drv->last_sect = 1; |
| drv->max_track = 0; |
| } |
| |
| static int _fd_sector (uint8_t head, uint8_t track, |
| uint8_t sect, uint8_t last_sect) |
| { |
| return (((track * 2) + head) * last_sect) + sect - 1; |
| } |
| |
| /* Returns current position, in sectors, for given drive */ |
| static int fd_sector (fdrive_t *drv) |
| { |
| return _fd_sector(drv->head, drv->track, drv->sect, drv->last_sect); |
| } |
| |
| static int fd_seek (fdrive_t *drv, uint8_t head, uint8_t track, uint8_t sect, |
| int enable_seek) |
| { |
| uint32_t sector; |
| |
| if (track > drv->max_track) { |
| FLOPPY_ERROR("try to read %d %02x %02x (max=%d %02x %02x)\n", |
| head, track, sect, 1, drv->max_track, drv->last_sect); |
| return 2; |
| } |
| if (sect > drv->last_sect) { |
| FLOPPY_ERROR("try to read %d %02x %02x (max=%d %02x %02x)\n", |
| head, track, sect, 1, drv->max_track, drv->last_sect); |
| return 3; |
| } |
| sector = _fd_sector(head, track, sect, drv->last_sect); |
| 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; |
| drv->track = track; |
| drv->sect = sect; |
| return 1; |
| } |
| |
| return 0; |
| } |
| |
| /* Set drive back to track 0 */ |
| static void fd_recalibrate (fdrive_t *drv) |
| { |
| FLOPPY_DPRINTF("recalibrate\n"); |
| drv->head = 0; |
| drv->track = 0; |
| drv->sect = 1; |
| drv->dir = 1; |
| drv->rw = 0; |
| } |
| |
| /* Revalidate a disk drive after a disk change */ |
| static void fd_revalidate (fdrive_t *drv, int ro) |
| { |
| int64_t nb_sectors; |
| |
| FLOPPY_DPRINTF("revalidate\n"); |
| drv->rv = 0; |
| if (drv->bs != NULL) { |
| bdrv_get_geometry(drv->bs, &nb_sectors); |
| #if 1 |
| if (nb_sectors > 2880) |
| #endif |
| { |
| /* Pretend we have a 2.88 MB disk */ |
| drv->disk = FDRIVE_DISK_288; |
| drv->last_sect = 36; |
| drv->max_track = 80; |
| #if 1 |
| } else if (nb_sectors > 1440) { |
| /* Pretend we have a 1.44 MB disk */ |
| drv->disk = FDRIVE_DISK_144; |
| drv->last_sect = 18; |
| drv->max_track = 80; |
| } else { |
| /* Pretend we have a 720 kB disk */ |
| drv->disk = FDRIVE_DISK_720; |
| drv->last_sect = 9; |
| drv->max_track = 80; |
| #endif |
| } |
| } else { |
| drv->disk = FDRIVE_DISK_NONE; |
| drv->last_sect = 1; /* Avoid eventual divide by 0 bugs */ |
| } |
| drv->ro = ro; |
| drv->rv = 1; |
| } |
| |
| /* Motor control */ |
| static void fd_start (fdrive_t *drv) |
| { |
| drv->motor = 1; |
| } |
| |
| static void fd_stop (fdrive_t *drv) |
| { |
| drv->motor = 0; |
| } |
| |
| /* Re-initialise a drives (motor off, repositioned) */ |
| static void fd_reset (fdrive_t *drv) |
| { |
| fd_stop(drv); |
| fd_recalibrate(drv); |
| } |
| |
| /********************************************************/ |
| /* Intel 82078 floppy disk controler emulation */ |
| |
| static void fdctrl_reset (int do_irq); |
| static void fdctrl_reset_fifo (void); |
| static int fdctrl_transfer_handler (uint32_t addr, int size, int *irq); |
| static int fdctrl_misc_handler (int duknwo); |
| static void fdctrl_raise_irq (uint8_t status); |
| |
| static uint32_t fdctrl_read_statusB (CPUState *env, uint32_t reg); |
| static uint32_t fdctrl_read_dor (CPUState *env, uint32_t reg); |
| static void fdctrl_write_dor (CPUState *env, uint32_t reg, uint32_t value); |
| static uint32_t fdctrl_read_tape (CPUState *env, uint32_t reg); |
| static void fdctrl_write_tape (CPUState *env, uint32_t reg, uint32_t value); |
| static uint32_t fdctrl_read_main_status (CPUState *env, uint32_t reg); |
| static void fdctrl_write_rate (CPUState *env, uint32_t reg, uint32_t value); |
| static uint32_t fdctrl_read_data (CPUState *env, uint32_t reg); |
| static void fdctrl_write_data (CPUState *env, uint32_t reg, uint32_t value); |
| static uint32_t fdctrl_read_dir (CPUState *env, uint32_t reg); |
| |
| enum { |
| FD_CTRL_ACTIVE = 0x01, |
| FD_CTRL_RESET = 0x02, |
| FD_CTRL_SLEEP = 0x04, |
| FD_CTRL_BUSY = 0x08, |
| FD_CTRL_INTR = 0x10, |
| }; |
| |
| enum { |
| FD_DIR_WRITE = 0, |
| FD_DIR_READ = 1, |
| FD_DIR_SCANE = 2, |
| FD_DIR_SCANL = 3, |
| FD_DIR_SCANH = 4, |
| }; |
| |
| enum { |
| FD_STATE_CMD = 0x00, |
| FD_STATE_STATUS = 0x01, |
| FD_STATE_DATA = 0x02, |
| FD_STATE_STATE = 0x03, |
| FD_STATE_MULTI = 0x10, |
| FD_STATE_SEEK = 0x20, |
| }; |
| |
| #define FD_STATE(state) ((state) & FD_STATE_STATE) |
| #define FD_MULTI_TRACK(state) ((state) & FD_STATE_MULTI) |
| #define FD_DID_SEEK(state) ((state) & FD_STATE_SEEK) |
| |
| typedef struct fdctrl_t { |
| /* Controler's identification */ |
| uint8_t version; |
| /* HW */ |
| int irq_lvl; |
| int dma_chann; |
| /* Controler state */ |
| uint8_t state; |
| uint8_t dma_en; |
| uint8_t cur_drv; |
| uint8_t bootsel; |
| /* Command FIFO */ |
| uint8_t fifo[FD_SECTOR_LEN]; |
| uint32_t data_pos; |
| uint32_t data_len; |
| uint8_t data_state; |
| uint8_t data_dir; |
| uint8_t int_status; |
| /* States kept only to be returned back */ |
| /* Timers state */ |
| uint8_t timer0; |
| uint8_t timer1; |
| /* precompensation */ |
| uint8_t precomp_trk; |
| uint8_t config; |
| uint8_t lock; |
| /* Power down config (also with status regB access mode */ |
| uint8_t pwrd; |
| /* Floppy drives */ |
| fdrive_t drives[2]; |
| } fdctrl_t; |
| |
| static fdctrl_t fdctrl; |
| |
| void fdctrl_init (int irq_lvl, int dma_chann, int mem_mapped, uint32_t base, |
| char boot_device) |
| { |
| // int io_mem; |
| int i; |
| |
| FLOPPY_DPRINTF("init controler\n"); |
| memset(&fdctrl, 0, sizeof(fdctrl)); |
| fdctrl.version = 0x90; /* Intel 82078 controler */ |
| fdctrl.irq_lvl = irq_lvl; |
| fdctrl.dma_chann = dma_chann; |
| fdctrl.config = 0x40; /* Implicit seek, polling & FIFO enabled */ |
| if (fdctrl.dma_chann != -1) { |
| fdctrl.dma_en = 1; |
| DMA_register_channel(dma_chann, &fdctrl_transfer_handler, |
| &fdctrl_misc_handler); |
| } else { |
| fdctrl.dma_en = 0; |
| } |
| for (i = 0; i < MAX_FD; i++) |
| fd_init(&fdctrl.drives[i]); |
| fdctrl_reset(0); |
| fdctrl.state = FD_CTRL_ACTIVE; |
| if (mem_mapped) { |
| FLOPPY_ERROR("memory mapped floppy not supported by now !\n"); |
| #if 0 |
| io_mem = cpu_register_io_memory(0, fdctrl_mem_read, fdctrl_mem_write); |
| cpu_register_physical_memory(base, 0x08, io_mem); |
| #endif |
| } else { |
| register_ioport_read(base + 0x01, 1, fdctrl_read_statusB, 1); |
| register_ioport_read(base + 0x02, 1, fdctrl_read_dor, 1); |
| register_ioport_write(base + 0x02, 1, fdctrl_write_dor, 1); |
| register_ioport_read(base + 0x03, 1, fdctrl_read_tape, 1); |
| register_ioport_write(base + 0x03, 1, fdctrl_write_tape, 1); |
| register_ioport_read(base + 0x04, 1, fdctrl_read_main_status, 1); |
| register_ioport_write(base + 0x04, 1, fdctrl_write_rate, 1); |
| register_ioport_read(base + 0x05, 1, fdctrl_read_data, 1); |
| register_ioport_write(base + 0x05, 1, fdctrl_write_data, 1); |
| register_ioport_read(base + 0x07, 1, fdctrl_read_dir, 1); |
| } |
| if (boot_device == 'b') |
| fdctrl.bootsel = 1; |
| else |
| fdctrl.bootsel = 0; |
| #if defined (TARGET_I386) |
| cmos_register_fd(fdctrl.drives[0].drive, fdctrl.drives[1].drive); |
| #endif |
| } |
| |
| int fdctrl_disk_change (int idx, const unsigned char *filename, int ro) |
| { |
| fdrive_t *drv; |
| |
| if (idx < 0 || idx > 1) |
| return -1; |
| FLOPPY_DPRINTF("disk %d change: %s (%s)\n", idx, filename, |
| ro == 0 ? "rw" : "ro"); |
| drv = &fdctrl.drives[idx]; |
| if (fd_table[idx] != NULL) { |
| bdrv_close(fd_table[idx]); |
| fd_table[idx] = NULL; |
| } |
| fd_table[idx] = bdrv_open(filename, ro); |
| drv->bs = fd_table[idx]; |
| if (fd_table[idx] == NULL) |
| return -1; |
| fd_revalidate(drv, ro); |
| #if 0 |
| fd_recalibrate(drv); |
| fdctrl_reset_fifo(); |
| fdctrl_raise_irq(0x20); |
| #endif |
| |
| return 0; |
| } |
| |
| /* Change IRQ state */ |
| static void fdctrl_reset_irq (void) |
| { |
| if (fdctrl.state & FD_CTRL_INTR) { |
| pic_set_irq(fdctrl.irq_lvl, 0); |
| fdctrl.state &= ~(FD_CTRL_INTR | FD_CTRL_SLEEP | FD_CTRL_BUSY); |
| } |
| } |
| |
| static void fdctrl_raise_irq (uint8_t status) |
| { |
| if (~(fdctrl.state & FD_CTRL_INTR)) { |
| pic_set_irq(fdctrl.irq_lvl, 1); |
| fdctrl.state |= FD_CTRL_INTR; |
| } |
| FLOPPY_DPRINTF("Set interrupt status to 0x%02x\n", status); |
| fdctrl.int_status = status; |
| } |
| |
| /* Reset controler */ |
| static void fdctrl_reset (int do_irq) |
| { |
| int i; |
| |
| FLOPPY_DPRINTF("reset controler\n"); |
| fdctrl_reset_irq(); |
| /* Initialise controler */ |
| fdctrl.cur_drv = 0; |
| /* FIFO state */ |
| fdctrl.data_pos = 0; |
| fdctrl.data_len = 0; |
| fdctrl.data_state = FD_STATE_CMD; |
| fdctrl.data_dir = FD_DIR_WRITE; |
| for (i = 0; i < MAX_FD; i++) |
| fd_reset(&fdctrl.drives[i]); |
| fdctrl_reset_fifo(); |
| if (do_irq) |
| fdctrl_raise_irq(0x20); |
| } |
| |
| /* Status B register : 0x01 (read-only) */ |
| static uint32_t fdctrl_read_statusB (CPUState *env, uint32_t reg) |
| { |
| fdctrl_reset_irq(); |
| FLOPPY_DPRINTF("status register: 0x00\n"); |
| |
| return 0; |
| } |
| |
| /* Digital output register : 0x02 */ |
| static uint32_t fdctrl_read_dor (CPUState *env, uint32_t reg) |
| { |
| fdrive_t *cur_drv, *drv0, *drv1; |
| uint32_t retval = 0; |
| |
| drv0 = &fdctrl.drives[fdctrl.bootsel]; |
| drv1 = &fdctrl.drives[1 - fdctrl.bootsel]; |
| cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1; |
| /* Drive motors state indicators */ |
| retval |= drv1->motor << 5; |
| retval |= drv0->motor << 4; |
| /* DMA enable */ |
| retval |= fdctrl.dma_en << 3; |
| /* Reset indicator */ |
| retval |= (fdctrl.state & FD_CTRL_RESET) == 0 ? 0x04 : 0; |
| /* Selected drive */ |
| retval |= fdctrl.cur_drv; |
| FLOPPY_DPRINTF("digital output register: 0x%02x\n", retval); |
| |
| return retval; |
| } |
| |
| static void fdctrl_write_dor (CPUState *env, uint32_t reg, uint32_t value) |
| { |
| fdrive_t *drv0, *drv1; |
| |
| fdctrl_reset_irq(); |
| drv0 = &fdctrl.drives[fdctrl.bootsel]; |
| drv1 = &fdctrl.drives[1 - fdctrl.bootsel]; |
| /* Reset mode */ |
| if (fdctrl.state & FD_CTRL_RESET) { |
| if (!(value & 0x04)) { |
| FLOPPY_DPRINTF("Floppy controler in RESET state !\n"); |
| return; |
| } |
| } |
| FLOPPY_DPRINTF("digital output register set to 0x%02x\n", value); |
| /* Drive motors state indicators */ |
| if (value & 0x20) |
| fd_start(drv1); |
| else |
| fd_stop(drv1); |
| if (value & 0x10) |
| fd_start(drv0); |
| else |
| fd_stop(drv0); |
| /* DMA enable */ |
| #if 0 |
| if (fdctrl.dma_chann != -1) |
| fdctrl.dma_en = 1 - ((value >> 3) & 1); |
| #endif |
| /* Reset */ |
| if (!(value & 0x04)) { |
| if (!(fdctrl.state & FD_CTRL_RESET)) { |
| FLOPPY_DPRINTF("controler enter RESET state\n"); |
| fdctrl.state |= FD_CTRL_RESET; |
| fdctrl_reset(1); |
| } |
| } else { |
| if (fdctrl.state & FD_CTRL_RESET) { |
| FLOPPY_DPRINTF("controler out of RESET state\n"); |
| fdctrl.state &= ~(FD_CTRL_RESET | FD_CTRL_SLEEP); |
| } |
| } |
| /* Selected drive */ |
| fdctrl.cur_drv = value & 1; |
| } |
| |
| /* Tape drive register : 0x03 */ |
| static uint32_t fdctrl_read_tape (CPUState *env, uint32_t reg) |
| { |
| uint32_t retval = 0; |
| |
| fdctrl_reset_irq(); |
| /* Disk boot selection indicator */ |
| retval |= fdctrl.bootsel << 2; |
| /* Tape indicators: never allowed */ |
| FLOPPY_DPRINTF("tape drive register: 0x%02x\n", retval); |
| |
| return retval; |
| } |
| |
| static void fdctrl_write_tape (CPUState *env, uint32_t reg, uint32_t value) |
| { |
| fdctrl_reset_irq(); |
| /* Reset mode */ |
| if (fdctrl.state & FD_CTRL_RESET) { |
| FLOPPY_DPRINTF("Floppy controler in RESET state !\n"); |
| return; |
| } |
| FLOPPY_DPRINTF("tape drive register set to 0x%02x\n", value); |
| /* Disk boot selection indicator */ |
| fdctrl.bootsel = (value >> 2) & 1; |
| /* Tape indicators: never allow */ |
| } |
| |
| /* Main status register : 0x04 (read) */ |
| static uint32_t fdctrl_read_main_status (CPUState *env, uint32_t reg) |
| { |
| uint32_t retval = 0; |
| |
| fdctrl_reset_irq(); |
| fdctrl.state &= ~(FD_CTRL_SLEEP | FD_CTRL_RESET); |
| if (!(fdctrl.state & FD_CTRL_BUSY)) { |
| /* Data transfer allowed */ |
| retval |= 0x80; |
| /* Data transfer direction indicator */ |
| if (fdctrl.data_dir == FD_DIR_READ) |
| retval |= 0x40; |
| } |
| /* Should handle 0x20 for SPECIFY command */ |
| /* Command busy indicator */ |
| if (FD_STATE(fdctrl.data_state) == FD_STATE_DATA || |
| FD_STATE(fdctrl.data_state) == FD_STATE_STATUS) |
| retval |= 0x10; |
| FLOPPY_DPRINTF("main status register: 0x%02x\n", retval); |
| |
| return retval; |
| } |
| |
| /* Data select rate register : 0x04 (write) */ |
| static void fdctrl_write_rate (CPUState *env, uint32_t reg, uint32_t value) |
| { |
| fdctrl_reset_irq(); |
| /* Reset mode */ |
| if (fdctrl.state & FD_CTRL_RESET) { |
| if (reg != 0x2 || !(value & 0x04)) { |
| FLOPPY_DPRINTF("Floppy controler in RESET state !\n"); |
| return; |
| } |
| } |
| FLOPPY_DPRINTF("select rate register set to 0x%02x\n", value); |
| /* Reset: autoclear */ |
| if (value & 0x80) { |
| fdctrl.state |= FD_CTRL_RESET; |
| fdctrl_reset(1); |
| fdctrl.state &= ~FD_CTRL_RESET; |
| } |
| if (value & 0x40) { |
| fdctrl.state |= FD_CTRL_SLEEP; |
| fdctrl_reset(1); |
| } |
| // fdctrl.precomp = (value >> 2) & 0x07; |
| } |
| |
| /* Digital input register : 0x07 (read-only) */ |
| static uint32_t fdctrl_read_dir (CPUState *env, uint32_t reg) |
| { |
| fdrive_t *drv0, *drv1; |
| uint32_t retval = 0; |
| |
| fdctrl_reset_irq(); |
| drv0 = &fdctrl.drives[fdctrl.bootsel]; |
| drv1 = &fdctrl.drives[1 - fdctrl.bootsel]; |
| if (drv0->rv || drv1->rv) |
| retval |= 0x80; |
| if (retval != 0) |
| FLOPPY_ERROR("Floppy digital input register: 0x%02x\n", retval); |
| drv0->rv = 0; |
| drv1->rv = 0; |
| |
| return retval; |
| } |
| |
| /* FIFO state control */ |
| static void fdctrl_reset_fifo (void) |
| { |
| fdctrl.data_dir = FD_DIR_WRITE; |
| fdctrl.data_pos = 0; |
| fdctrl.data_state = FD_STATE_CMD; |
| } |
| |
| /* Set FIFO status for the host to read */ |
| static void fdctrl_set_fifo (int fifo_len, int do_irq) |
| { |
| fdctrl.data_dir = FD_DIR_READ; |
| fdctrl.data_len = fifo_len; |
| fdctrl.data_pos = 0; |
| fdctrl.data_state = FD_STATE_STATUS; |
| if (do_irq) |
| fdctrl_raise_irq(0x00); |
| } |
| |
| /* Set an error: unimplemented/unknown command */ |
| static void fdctrl_unimplemented (void) |
| { |
| #if 0 |
| fdrive_t *cur_drv, *drv0, *drv1; |
| |
| drv0 = &fdctrl.drives[fdctrl.bootsel]; |
| drv1 = &fdctrl.drives[1 - fdctrl.bootsel]; |
| cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1; |
| fdctrl.fifo[0] = 0x60 | (cur_drv->head << 1) | fdctrl.cur_drv; |
| fdctrl.fifo[1] = 0x00; |
| fdctrl.fifo[2] = 0x00; |
| fdctrl_set_fifo(3, 1); |
| #else |
| fdctrl_reset_fifo(); |
| #endif |
| } |
| |
| /* Callback for transfer end (stop or abort) */ |
| static void fdctrl_stop_transfer (uint8_t status0, uint8_t status1, |
| uint8_t status2) |
| { |
| fdrive_t *cur_drv, *drv0, *drv1; |
| |
| drv0 = &fdctrl.drives[fdctrl.bootsel]; |
| drv1 = &fdctrl.drives[1 - fdctrl.bootsel]; |
| cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1; |
| FLOPPY_DPRINTF("transfer status: %02x %02x %02x (%02x)\n", |
| status0, status1, status2, |
| status0 | (cur_drv->head << 1) | fdctrl.cur_drv); |
| fdctrl.fifo[0] = status0 | (cur_drv->head << 1) | fdctrl.cur_drv; |
| fdctrl.fifo[1] = status1; |
| fdctrl.fifo[2] = status2; |
| fdctrl.fifo[3] = cur_drv->track; |
| fdctrl.fifo[4] = cur_drv->head; |
| fdctrl.fifo[5] = cur_drv->sect; |
| fdctrl.fifo[6] = FD_SECTOR_SC; |
| fdctrl.data_dir = FD_DIR_READ; |
| if (fdctrl.state & FD_CTRL_BUSY) |
| DMA_release_DREQ(fdctrl.dma_chann); |
| fdctrl_set_fifo(7, 1); |
| } |
| |
| /* Prepare a data transfer (either DMA or FIFO) */ |
| static void fdctrl_start_transfer (int direction) |
| { |
| fdrive_t *cur_drv, *drv0, *drv1; |
| uint8_t kh, kt, ks; |
| int did_seek; |
| |
| drv0 = &fdctrl.drives[fdctrl.bootsel]; |
| drv1 = &fdctrl.drives[1 - fdctrl.bootsel]; |
| fdctrl.cur_drv = fdctrl.fifo[1] & 1; |
| cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1; |
| kt = fdctrl.fifo[2]; |
| kh = fdctrl.fifo[3]; |
| ks = fdctrl.fifo[4]; |
| FLOPPY_DPRINTF("Start tranfert at %d %d %02x %02x (%d)\n", |
| fdctrl.cur_drv, kh, kt, ks, |
| _fd_sector(kh, kt, ks, cur_drv->last_sect)); |
| did_seek = 0; |
| switch (fd_seek(cur_drv, kh, kt, ks, fdctrl.config & 0x40)) { |
| case 2: |
| /* sect too big */ |
| fdctrl_stop_transfer(0x40, 0x00, 0x00); |
| fdctrl.fifo[3] = kt; |
| fdctrl.fifo[4] = kh; |
| fdctrl.fifo[5] = ks; |
| return; |
| case 3: |
| /* track too big */ |
| fdctrl_stop_transfer(0x40, 0x80, 0x00); |
| fdctrl.fifo[3] = kt; |
| fdctrl.fifo[4] = kh; |
| fdctrl.fifo[5] = ks; |
| return; |
| case 4: |
| /* No seek enabled */ |
| fdctrl_stop_transfer(0x40, 0x00, 0x00); |
| fdctrl.fifo[3] = kt; |
| fdctrl.fifo[4] = kh; |
| fdctrl.fifo[5] = ks; |
| return; |
| case 1: |
| did_seek = 1; |
| break; |
| default: |
| break; |
| } |
| /* Set the FIFO state */ |
| fdctrl.data_dir = direction; |
| fdctrl.data_pos = 0; |
| fdctrl.data_state = FD_STATE_DATA; /* FIFO ready for data */ |
| if (fdctrl.fifo[0] & 0x80) |
| fdctrl.data_state |= FD_STATE_MULTI; |
| if (did_seek) |
| fdctrl.data_state |= FD_STATE_SEEK; |
| if (fdctrl.dma_en) { |
| int dma_mode; |
| /* DMA transfer are enabled. Check if DMA channel is well programmed */ |
| dma_mode = DMA_get_channel_mode(fdctrl.dma_chann); |
| dma_mode = (dma_mode >> 2) & 3; |
| FLOPPY_DPRINTF("dma_mode=%d direction=%d (%d)\n", dma_mode, direction, |
| (128 << fdctrl.fifo[5]) * |
| (cur_drv->last_sect - ks + 1)); |
| if (((direction == FD_DIR_SCANE || direction == FD_DIR_SCANL || |
| direction == FD_DIR_SCANH) && dma_mode == 0) || |
| (direction == FD_DIR_WRITE && dma_mode == 2) || |
| (direction == FD_DIR_READ && dma_mode == 1)) { |
| /* No access is allowed until DMA transfer has completed */ |
| fdctrl.state |= FD_CTRL_BUSY; |
| /* Now, we just have to wait for the DMA controler to |
| * recall us... |
| */ |
| DMA_hold_DREQ(fdctrl.dma_chann); |
| return; |
| } |
| } |
| FLOPPY_DPRINTF("start non-DMA transfer\n"); |
| /* IO based transfer: calculate len */ |
| if (fdctrl.fifo[5] == 00) { |
| fdctrl.data_len = fdctrl.fifo[8]; |
| } else { |
| fdctrl.data_len = 128 << fdctrl.fifo[5]; |
| fdctrl.data_len *= (cur_drv->last_sect - ks + 1); |
| if (fdctrl.fifo[0] & 0x80) |
| fdctrl.data_len *= 2; |
| } |
| fdctrl_raise_irq(0x00); |
| |
| return; |
| } |
| |
| /* Prepare a transfer of deleted data */ |
| static void fdctrl_start_transfer_del (int direction) |
| { |
| /* We don't handle deleted data, |
| * so we don't return *ANYTHING* |
| */ |
| fdctrl_stop_transfer(0x60, 0x00, 0x00); |
| } |
| |
| /* handlers for DMA transfers */ |
| static int fdctrl_transfer_handler (uint32_t addr, int size, int *irq) |
| { |
| fdrive_t *cur_drv, *drv0, *drv1; |
| void *orig; |
| int len; |
| uint8_t status0 = 0x00, status1 = 0x00, status2 = 0x00; |
| |
| fdctrl_reset_irq(); |
| if (!(fdctrl.state & FD_CTRL_BUSY)) { |
| FLOPPY_DPRINTF("Not in DMA transfer mode !\n"); |
| return 0; |
| } |
| drv0 = &fdctrl.drives[fdctrl.bootsel]; |
| drv1 = &fdctrl.drives[1 - fdctrl.bootsel]; |
| cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1; |
| // *irq = fdctrl.irq_lvl; |
| *irq = -1; |
| if (fdctrl.data_dir == FD_DIR_SCANE || fdctrl.data_dir == FD_DIR_SCANL || |
| fdctrl.data_dir == FD_DIR_SCANH) |
| status2 = 0x04; |
| for (fdctrl.data_len = size; fdctrl.data_pos < fdctrl.data_len; |
| fdctrl.data_pos += len) { |
| len = size - fdctrl.data_pos; |
| if (len > FD_SECTOR_LEN) |
| len = FD_SECTOR_LEN; |
| FLOPPY_DPRINTF("copy %d bytes (%d %d %d) %d pos %d %02x %02x " |
| "(%d-0x%08x)\n", len, size, fdctrl.data_pos, |
| fdctrl.data_len, fdctrl.cur_drv, cur_drv->head, |
| cur_drv->track, cur_drv->sect, fd_sector(cur_drv), |
| fd_sector(cur_drv) * 512); |
| if (len < FD_SECTOR_LEN) { |
| memset(&fdctrl.fifo[FD_SECTOR_LEN - len], 0, |
| FD_SECTOR_LEN - len - 1); |
| orig = fdctrl.fifo; |
| } else { |
| orig = (void *)(addr + fdctrl.data_pos); |
| } |
| if (fdctrl.data_dir != FD_DIR_WRITE) { |
| /* READ & SCAN commands */ |
| if (cur_drv->bs == NULL) { |
| fdctrl_stop_transfer(0x40, 0x00, 0x00); |
| goto transfer_error; |
| } |
| |
| if (bdrv_read(cur_drv->bs, fd_sector(cur_drv), orig, 1) < 0) { |
| FLOPPY_DPRINTF("Floppy: error getting sector %d\n", |
| fd_sector(cur_drv)); |
| /* Sure, image size is too small... */ |
| memset((void *)(addr + fdctrl.data_pos), 0, FD_SECTOR_LEN); |
| } |
| if (fdctrl.data_dir == FD_DIR_READ) { |
| if (len < FD_SECTOR_LEN) { |
| memcpy((void *)(addr + fdctrl.data_pos), |
| fdctrl.fifo, FD_SECTOR_LEN); |
| } |
| } else { |
| int ret; |
| ret = memcmp((void *)(addr + fdctrl.data_pos), |
| fdctrl.fifo, FD_SECTOR_LEN); |
| if (ret == 0) { |
| status2 = 0x08; |
| goto end_transfer; |
| } |
| if ((ret < 0 && fdctrl.data_dir == FD_DIR_SCANL) || |
| (ret > 0 && fdctrl.data_dir == FD_DIR_SCANH)) { |
| status2 = 0x00; |
| goto end_transfer; |
| } |
| } |
| } else { |
| /* WRITE commands */ |
| if (cur_drv->bs == NULL || |
| bdrv_write(cur_drv->bs, fd_sector(cur_drv), orig, 1) < 0) { |
| FLOPPY_ERROR("writting sector %d\n", fd_sector(cur_drv)); |
| fdctrl_stop_transfer(0x60, 0x00, 0x00); |
| goto transfer_error; |
| } |
| } |
| if (len == FD_SECTOR_LEN) { |
| /* Seek to next sector */ |
| if (cur_drv->sect == cur_drv->last_sect) { |
| if (cur_drv->head == 0) { |
| cur_drv->head = 1; |
| } else { |
| cur_drv->track++; |
| cur_drv->head = 0; |
| } |
| cur_drv->sect = 1; |
| FLOPPY_DPRINTF("seek to next sector (%d %02x %02x => %d)\n", |
| cur_drv->head, cur_drv->track, cur_drv->sect, |
| fd_sector(cur_drv)); |
| if (cur_drv->head == 0) { |
| FLOPPY_DPRINTF("end transfer\n"); |
| goto end_transfer; |
| } |
| if (!FD_MULTI_TRACK(fdctrl.data_state)) { |
| /* Single track read */ |
| FLOPPY_DPRINTF("single track transfert: end transfer\n"); |
| // status1 |= 0x80; |
| goto end_transfer; |
| } |
| } else { |
| cur_drv->sect++; |
| FLOPPY_DPRINTF("seek to next sector (%d %02x %02x => %d)\n", |
| cur_drv->head, cur_drv->track, cur_drv->sect, |
| fd_sector(cur_drv)); |
| } |
| } |
| } |
| end_transfer: |
| if (fdctrl.data_dir == FD_DIR_SCANE || |
| fdctrl.data_dir == FD_DIR_SCANL || |
| fdctrl.data_dir == FD_DIR_SCANH) |
| status2 = 0x08; |
| if (FD_DID_SEEK(fdctrl.data_state)) |
| status0 |= 0x20; |
| fdctrl_stop_transfer(status0, status1, status2); |
| transfer_error: |
| |
| return fdctrl.data_pos; |
| } |
| |
| /* Unused... */ |
| static int fdctrl_misc_handler (int duknwo) |
| { |
| return -1; |
| } |
| |
| /* Data register : 0x05 */ |
| static uint32_t fdctrl_read_data (CPUState *env, uint32_t reg) |
| { |
| fdrive_t *cur_drv, *drv0, *drv1; |
| uint32_t retval = 0; |
| int pos, len; |
| |
| fdctrl_reset_irq(); |
| drv0 = &fdctrl.drives[fdctrl.bootsel]; |
| drv1 = &fdctrl.drives[1 - fdctrl.bootsel]; |
| cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1; |
| fdctrl.state &= ~FD_CTRL_SLEEP; |
| if (FD_STATE(fdctrl.data_state) == FD_STATE_CMD) { |
| FLOPPY_ERROR("can't read data in CMD state\n"); |
| return 0; |
| } |
| pos = fdctrl.data_pos; |
| if (FD_STATE(fdctrl.data_state) == FD_STATE_DATA) { |
| pos %= FD_SECTOR_LEN; |
| if (pos == 0) { |
| len = fdctrl.data_len - fdctrl.data_pos; |
| if (len > FD_SECTOR_LEN) |
| len = FD_SECTOR_LEN; |
| bdrv_read(cur_drv->bs, fd_sector(cur_drv), |
| fdctrl.fifo, len); |
| } |
| } |
| retval = fdctrl.fifo[pos]; |
| if (++fdctrl.data_pos == fdctrl.data_len) { |
| fdctrl.data_pos = 0; |
| /* Switch from transfert mode to status mode |
| * then from status mode to command mode |
| */ |
| if (FD_STATE(fdctrl.data_state) == FD_STATE_DATA) |
| fdctrl_stop_transfer(0x20, 0x00, 0x00); |
| else |
| fdctrl_reset_fifo(); |
| } |
| FLOPPY_DPRINTF("data register: 0x%02x\n", retval); |
| |
| return retval; |
| } |
| |
| static void fdctrl_write_data (CPUState *env, uint32_t reg, uint32_t value) |
| { |
| fdrive_t *cur_drv, *drv0, *drv1; |
| |
| fdctrl_reset_irq(); |
| drv0 = &fdctrl.drives[fdctrl.bootsel]; |
| drv1 = &fdctrl.drives[1 - fdctrl.bootsel]; |
| cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1; |
| /* Reset mode */ |
| if (fdctrl.state & FD_CTRL_RESET) { |
| FLOPPY_DPRINTF("Floppy controler in RESET state !\n"); |
| return; |
| } |
| fdctrl.state &= ~FD_CTRL_SLEEP; |
| if ((fdctrl.data_state & FD_STATE_STATE) == FD_STATE_STATUS) { |
| FLOPPY_ERROR("can't write data in status mode\n"); |
| return; |
| } |
| /* Is it write command time ? */ |
| if (FD_STATE(fdctrl.data_state) == FD_STATE_DATA) { |
| /* FIFO data write */ |
| fdctrl.fifo[fdctrl.data_pos++] = value; |
| if (fdctrl.data_pos % FD_SECTOR_LEN == (FD_SECTOR_LEN - 1) || |
| fdctrl.data_pos == fdctrl.data_len) { |
| bdrv_write(cur_drv->bs, fd_sector(cur_drv), |
| fdctrl.fifo, FD_SECTOR_LEN); |
| } |
| /* Switch from transfert mode to status mode |
| * then from status mode to command mode |
| */ |
| if (FD_STATE(fdctrl.data_state) == FD_STATE_DATA) |
| fdctrl_stop_transfer(0x20, 0x00, 0x00); |
| return; |
| } |
| if (fdctrl.data_pos == 0) { |
| /* Command */ |
| switch (value & 0x5F) { |
| case 0x46: |
| /* READ variants */ |
| FLOPPY_DPRINTF("READ command\n"); |
| /* 8 parameters cmd */ |
| fdctrl.data_len = 9; |
| goto enqueue; |
| case 0x4C: |
| /* READ_DELETED variants */ |
| FLOPPY_DPRINTF("READ_DELETED command\n"); |
| /* 8 parameters cmd */ |
| fdctrl.data_len = 9; |
| goto enqueue; |
| case 0x50: |
| /* SCAN_EQUAL variants */ |
| FLOPPY_DPRINTF("SCAN_EQUAL command\n"); |
| /* 8 parameters cmd */ |
| fdctrl.data_len = 9; |
| goto enqueue; |
| case 0x56: |
| /* VERIFY variants */ |
| FLOPPY_DPRINTF("VERIFY command\n"); |
| /* 8 parameters cmd */ |
| fdctrl.data_len = 9; |
| goto enqueue; |
| case 0x59: |
| /* SCAN_LOW_OR_EQUAL variants */ |
| FLOPPY_DPRINTF("SCAN_LOW_OR_EQUAL command\n"); |
| /* 8 parameters cmd */ |
| fdctrl.data_len = 9; |
| goto enqueue; |
| case 0x5D: |
| /* SCAN_HIGH_OR_EQUAL variants */ |
| FLOPPY_DPRINTF("SCAN_HIGH_OR_EQUAL command\n"); |
| /* 8 parameters cmd */ |
| fdctrl.data_len = 9; |
| goto enqueue; |
| default: |
| break; |
| } |
| switch (value & 0x7F) { |
| case 0x45: |
| /* WRITE variants */ |
| FLOPPY_DPRINTF("WRITE command\n"); |
| /* 8 parameters cmd */ |
| fdctrl.data_len = 9; |
| goto enqueue; |
| case 0x49: |
| /* WRITE_DELETED variants */ |
| FLOPPY_DPRINTF("WRITE_DELETED command\n"); |
| /* 8 parameters cmd */ |
| fdctrl.data_len = 9; |
| goto enqueue; |
| default: |
| break; |
| } |
| switch (value) { |
| case 0x03: |
| /* SPECIFY */ |
| FLOPPY_DPRINTF("SPECIFY command\n"); |
| /* 1 parameter cmd */ |
| fdctrl.data_len = 3; |
| goto enqueue; |
| case 0x04: |
| /* SENSE_DRIVE_STATUS */ |
| FLOPPY_DPRINTF("SENSE_DRIVE_STATUS command\n"); |
| /* 1 parameter cmd */ |
| fdctrl.data_len = 2; |
| goto enqueue; |
| case 0x07: |
| /* RECALIBRATE */ |
| FLOPPY_DPRINTF("RECALIBRATE command\n"); |
| /* 1 parameter cmd */ |
| fdctrl.data_len = 2; |
| goto enqueue; |
| case 0x08: |
| /* SENSE_INTERRUPT_STATUS */ |
| FLOPPY_DPRINTF("SENSE_INTERRUPT_STATUS command (%02x)\n", |
| fdctrl.int_status); |
| /* No parameters cmd: returns status if no interrupt */ |
| fdctrl.fifo[0] = |
| fdctrl.int_status | (cur_drv->head << 2) | fdctrl.cur_drv; |
| fdctrl.fifo[1] = cur_drv->track; |
| fdctrl_set_fifo(2, 0); |
| return; |
| case 0x0E: |
| /* DUMPREG */ |
| FLOPPY_DPRINTF("DUMPREG command\n"); |
| /* Drives position */ |
| fdctrl.fifo[0] = drv0->track; |
| fdctrl.fifo[1] = drv1->track; |
| fdctrl.fifo[2] = 0; |
| fdctrl.fifo[3] = 0; |
| /* timers */ |
| fdctrl.fifo[4] = fdctrl.timer0; |
| fdctrl.fifo[5] = (fdctrl.timer1 << 1) | fdctrl.dma_en; |
| fdctrl.fifo[6] = cur_drv->last_sect; |
| fdctrl.fifo[7] = (fdctrl.lock << 7) | |
| (cur_drv->perpendicular << 2); |
| fdctrl.fifo[8] = fdctrl.config; |
| fdctrl.fifo[9] = fdctrl.precomp_trk; |
| fdctrl_set_fifo(10, 0); |
| return; |
| case 0x0F: |
| /* SEEK */ |
| FLOPPY_DPRINTF("SEEK command\n"); |
| /* 2 parameters cmd */ |
| fdctrl.data_len = 3; |
| goto enqueue; |
| case 0x10: |
| /* VERSION */ |
| FLOPPY_DPRINTF("VERSION command\n"); |
| /* No parameters cmd */ |
| /* Controler's version */ |
| fdctrl.fifo[0] = fdctrl.version; |
| fdctrl_set_fifo(1, 1); |
| return; |
| case 0x12: |
| /* PERPENDICULAR_MODE */ |
| FLOPPY_DPRINTF("PERPENDICULAR_MODE command\n"); |
| /* 1 parameter cmd */ |
| fdctrl.data_len = 2; |
| goto enqueue; |
| case 0x13: |
| /* CONFIGURE */ |
| FLOPPY_DPRINTF("CONFIGURE command\n"); |
| /* 3 parameters cmd */ |
| fdctrl.data_len = 4; |
| goto enqueue; |
| case 0x14: |
| /* UNLOCK */ |
| FLOPPY_DPRINTF("UNLOCK command\n"); |
| /* No parameters cmd */ |
| fdctrl.lock = 0; |
| fdctrl.fifo[0] = 0; |
| fdctrl_set_fifo(1, 0); |
| return; |
| case 0x17: |
| /* POWERDOWN_MODE */ |
| FLOPPY_DPRINTF("POWERDOWN_MODE command\n"); |
| /* 2 parameters cmd */ |
| fdctrl.data_len = 3; |
| goto enqueue; |
| case 0x18: |
| /* PART_ID */ |
| FLOPPY_DPRINTF("PART_ID command\n"); |
| /* No parameters cmd */ |
| fdctrl.fifo[0] = 0x41; /* Stepping 1 */ |
| fdctrl_set_fifo(1, 0); |
| return; |
| case 0x2C: |
| /* SAVE */ |
| FLOPPY_DPRINTF("SAVE command\n"); |
| /* No parameters cmd */ |
| fdctrl.fifo[0] = 0; |
| fdctrl.fifo[1] = 0; |
| /* Drives position */ |
| fdctrl.fifo[2] = drv0->track; |
| fdctrl.fifo[3] = drv1->track; |
| fdctrl.fifo[4] = 0; |
| fdctrl.fifo[5] = 0; |
| /* timers */ |
| fdctrl.fifo[6] = fdctrl.timer0; |
| fdctrl.fifo[7] = fdctrl.timer1; |
| fdctrl.fifo[8] = cur_drv->last_sect; |
| fdctrl.fifo[9] = (fdctrl.lock << 7) | |
| (cur_drv->perpendicular << 2); |
| fdctrl.fifo[10] = fdctrl.config; |
| fdctrl.fifo[11] = fdctrl.precomp_trk; |
| fdctrl.fifo[12] = fdctrl.pwrd; |
| fdctrl.fifo[13] = 0; |
| fdctrl.fifo[14] = 0; |
| fdctrl_set_fifo(15, 1); |
| return; |
| case 0x33: |
| /* OPTION */ |
| FLOPPY_DPRINTF("OPTION command\n"); |
| /* 1 parameter cmd */ |
| fdctrl.data_len = 2; |
| goto enqueue; |
| case 0x42: |
| /* READ_TRACK */ |
| FLOPPY_DPRINTF("READ_TRACK command\n"); |
| /* 8 parameters cmd */ |
| fdctrl.data_len = 9; |
| goto enqueue; |
| case 0x4A: |
| /* READ_ID */ |
| FLOPPY_DPRINTF("READ_ID command\n"); |
| /* 1 parameter cmd */ |
| fdctrl.data_len = 2; |
| goto enqueue; |
| case 0x4C: |
| /* RESTORE */ |
| FLOPPY_DPRINTF("RESTORE command\n"); |
| /* 17 parameters cmd */ |
| fdctrl.data_len = 18; |
| goto enqueue; |
| case 0x4D: |
| /* FORMAT_TRACK */ |
| FLOPPY_DPRINTF("FORMAT_TRACK command\n"); |
| /* 5 parameters cmd */ |
| fdctrl.data_len = 9; |
| goto enqueue; |
| case 0x8E: |
| /* DRIVE_SPECIFICATION_COMMAND */ |
| FLOPPY_DPRINTF("DRIVE_SPECIFICATION_COMMAND command\n"); |
| /* 5 parameters cmd */ |
| fdctrl.data_len = 6; |
| goto enqueue; |
| case 0x8F: |
| /* RELATIVE_SEEK_OUT */ |
| FLOPPY_DPRINTF("RELATIVE_SEEK_OUT command\n"); |
| /* 2 parameters cmd */ |
| fdctrl.data_len = 3; |
| goto enqueue; |
| case 0x94: |
| /* LOCK */ |
| FLOPPY_DPRINTF("LOCK command\n"); |
| /* No parameters cmd */ |
| fdctrl.lock = 1; |
| fdctrl.fifo[0] = 0x10; |
| fdctrl_set_fifo(1, 1); |
| return; |
| case 0xCD: |
| /* FORMAT_AND_WRITE */ |
| FLOPPY_DPRINTF("FORMAT_AND_WRITE command\n"); |
| /* 10 parameters cmd */ |
| fdctrl.data_len = 11; |
| goto enqueue; |
| case 0xCF: |
| /* RELATIVE_SEEK_IN */ |
| FLOPPY_DPRINTF("RELATIVE_SEEK_IN command\n"); |
| /* 2 parameters cmd */ |
| fdctrl.data_len = 3; |
| goto enqueue; |
| default: |
| /* Unknown command */ |
| FLOPPY_ERROR("unknown command: 0x%02x\n", value); |
| fdctrl_unimplemented(); |
| return; |
| } |
| } |
| enqueue: |
| 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 |
| */ |
| switch (fdctrl.fifo[0] & 0x1F) { |
| case 0x06: |
| { |
| /* READ variants */ |
| FLOPPY_DPRINTF("treat READ command\n"); |
| fdctrl_start_transfer(FD_DIR_READ); |
| return; |
| } |
| case 0x0C: |
| /* READ_DELETED variants */ |
| // FLOPPY_DPRINTF("treat READ_DELETED command\n"); |
| FLOPPY_ERROR("treat READ_DELETED command\n"); |
| fdctrl_start_transfer_del(1); |
| return; |
| case 0x16: |
| /* VERIFY variants */ |
| // FLOPPY_DPRINTF("treat VERIFY command\n"); |
| FLOPPY_ERROR("treat VERIFY command\n"); |
| fdctrl_stop_transfer(0x20, 0x00, 0x00); |
| return; |
| case 0x10: |
| /* SCAN_EQUAL variants */ |
| // FLOPPY_DPRINTF("treat SCAN_EQUAL command\n"); |
| FLOPPY_ERROR("treat SCAN_EQUAL command\n"); |
| fdctrl_start_transfer(FD_DIR_SCANE); |
| return; |
| case 0x19: |
| /* SCAN_LOW_OR_EQUAL variants */ |
| // FLOPPY_DPRINTF("treat SCAN_LOW_OR_EQUAL command\n"); |
| FLOPPY_ERROR("treat SCAN_LOW_OR_EQUAL command\n"); |
| fdctrl_start_transfer(FD_DIR_SCANL); |
| return; |
| case 0x1D: |
| /* SCAN_HIGH_OR_EQUAL variants */ |
| // FLOPPY_DPRINTF("treat SCAN_HIGH_OR_EQUAL command\n"); |
| FLOPPY_ERROR("treat SCAN_HIGH_OR_EQUAL command\n"); |
| fdctrl_start_transfer(FD_DIR_SCANH); |
| return; |
| default: |
| break; |
| } |
| switch (fdctrl.fifo[0] & 0x3F) { |
| case 0x05: |
| /* WRITE variants */ |
| FLOPPY_DPRINTF("treat WRITE command (%02x)\n", fdctrl.fifo[0]); |
| fdctrl_start_transfer(FD_DIR_WRITE); |
| return; |
| case 0x09: |
| /* WRITE_DELETED variants */ |
| // FLOPPY_DPRINTF("treat WRITE_DELETED command\n"); |
| FLOPPY_ERROR("treat WRITE_DELETED command\n"); |
| fdctrl_start_transfer_del(FD_DIR_WRITE); |
| return; |
| default: |
| break; |
| } |
| switch (fdctrl.fifo[0]) { |
| case 0x03: |
| /* SPECIFY */ |
| FLOPPY_DPRINTF("treat SPECIFY command\n"); |
| fdctrl.timer0 = (fdctrl.fifo[1] >> 4) & 0xF; |
| fdctrl.timer1 = fdctrl.fifo[1] >> 1; |
| /* No result back */ |
| fdctrl_reset_fifo(); |
| break; |
| case 0x04: |
| /* SENSE_DRIVE_STATUS */ |
| FLOPPY_DPRINTF("treat SENSE_DRIVE_STATUS command\n"); |
| fdctrl.cur_drv = fdctrl.fifo[1] & 1; |
| cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1; |
| 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) | |
| fdctrl.cur_drv; |
| fdctrl_set_fifo(1, 0); |
| break; |
| case 0x07: |
| /* RECALIBRATE */ |
| FLOPPY_DPRINTF("treat RECALIBRATE command\n"); |
| fdctrl.cur_drv = fdctrl.fifo[1] & 1; |
| cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1; |
| fd_recalibrate(cur_drv); |
| fdctrl_reset_fifo(); |
| /* Raise Interrupt */ |
| fdctrl_raise_irq(0x20); |
| break; |
| case 0x0F: |
| /* SEEK */ |
| FLOPPY_DPRINTF("treat SEEK command\n"); |
| fdctrl.cur_drv = fdctrl.fifo[1] & 1; |
| cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1; |
| if (fdctrl.fifo[2] <= cur_drv->track) |
| cur_drv->dir = 1; |
| else |
| cur_drv->dir = 0; |
| cur_drv->head = (fdctrl.fifo[1] >> 2) & 1; |
| if (fdctrl.fifo[2] > cur_drv->max_track) { |
| fdctrl_raise_irq(0x60); |
| } else { |
| cur_drv->track = fdctrl.fifo[2]; |
| fdctrl_reset_fifo(); |
| /* Raise Interrupt */ |
| fdctrl_raise_irq(0x20); |
| } |
| break; |
| case 0x12: |
| /* PERPENDICULAR_MODE */ |
| FLOPPY_DPRINTF("treat PERPENDICULAR_MODE command\n"); |
| if (fdctrl.fifo[1] & 0x80) |
| cur_drv->perpendicular = fdctrl.fifo[1] & 0x7; |
| /* No result back */ |
| fdctrl_reset_fifo(); |
| break; |
| case 0x13: |
| /* CONFIGURE */ |
| FLOPPY_DPRINTF("treat CONFIGURE command\n"); |
| fdctrl.config = fdctrl.fifo[2]; |
| fdctrl.precomp_trk = fdctrl.fifo[3]; |
| /* No result back */ |
| fdctrl_reset_fifo(); |
| break; |
| case 0x17: |
| /* POWERDOWN_MODE */ |
| FLOPPY_DPRINTF("treat POWERDOWN_MODE command\n"); |
| fdctrl.pwrd = fdctrl.fifo[1]; |
| fdctrl.fifo[0] = fdctrl.fifo[1]; |
| fdctrl_set_fifo(1, 1); |
| break; |
| case 0x33: |
| /* OPTION */ |
| FLOPPY_DPRINTF("treat OPTION command\n"); |
| /* No result back */ |
| fdctrl_reset_fifo(); |
| break; |
| case 0x42: |
| /* READ_TRACK */ |
| // FLOPPY_DPRINTF("treat READ_TRACK command\n"); |
| FLOPPY_ERROR("treat READ_TRACK command\n"); |
| fdctrl_unimplemented(); |
| break; |
| case 0x4A: |
| /* READ_ID */ |
| // FLOPPY_DPRINTF("treat READ_ID command\n"); |
| FLOPPY_ERROR("treat READ_ID command\n"); |
| fdctrl_stop_transfer(0x00, 0x00, 0x00); |
| break; |
| case 0x4C: |
| /* RESTORE */ |
| FLOPPY_DPRINTF("treat RESTORE command\n"); |
| /* Drives position */ |
| drv0->track = fdctrl.fifo[3]; |
| drv1->track = fdctrl.fifo[4]; |
| /* timers */ |
| fdctrl.timer0 = fdctrl.fifo[7]; |
| fdctrl.timer1 = fdctrl.fifo[8]; |
| cur_drv->last_sect = fdctrl.fifo[9]; |
| fdctrl.lock = fdctrl.fifo[10] >> 7; |
| cur_drv->perpendicular = (fdctrl.fifo[10] >> 2) & 0xF; |
| fdctrl.config = fdctrl.fifo[11]; |
| fdctrl.precomp_trk = fdctrl.fifo[12]; |
| fdctrl.pwrd = fdctrl.fifo[13]; |
| fdctrl_reset_fifo(); |
| break; |
| case 0x4D: |
| /* FORMAT_TRACK */ |
| // FLOPPY_DPRINTF("treat FORMAT_TRACK command\n"); |
| FLOPPY_ERROR("treat FORMAT_TRACK command\n"); |
| fdctrl_unimplemented(); |
| break; |
| case 0x8E: |
| /* DRIVE_SPECIFICATION_COMMAND */ |
| FLOPPY_DPRINTF("treat DRIVE_SPECIFICATION_COMMAND command\n"); |
| if (fdctrl.fifo[fdctrl.data_pos - 1] & 0x80) { |
| /* Command parameters done */ |
| if (fdctrl.fifo[fdctrl.data_pos - 1] & 0x40) { |
| fdctrl.fifo[0] = fdctrl.fifo[1]; |
| fdctrl.fifo[2] = 0; |
| fdctrl.fifo[3] = 0; |
| fdctrl_set_fifo(4, 1); |
| } else { |
| fdctrl_reset_fifo(); |
| } |
| } else if (fdctrl.data_len > 7) { |
| /* ERROR */ |
| fdctrl.fifo[0] = 0x80 | |
| (cur_drv->head << 2) | fdctrl.cur_drv; |
| fdctrl_set_fifo(1, 1); |
| } |
| break; |
| case 0x8F: |
| /* RELATIVE_SEEK_OUT */ |
| FLOPPY_DPRINTF("treat RELATIVE_SEEK_OUT command\n"); |
| fdctrl.cur_drv = fdctrl.fifo[1] & 1; |
| cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1; |
| cur_drv->head = (fdctrl.fifo[1] >> 2) & 1; |
| if (fdctrl.fifo[2] + cur_drv->track > cur_drv->max_track) { |
| /* ERROR */ |
| fdctrl_raise_irq(0x70); |
| } else { |
| cur_drv->track += fdctrl.fifo[2]; |
| cur_drv->dir = 0; |
| fdctrl_reset_fifo(); |
| fdctrl_raise_irq(0x20); |
| } |
| break; |
| case 0xCD: |
| /* FORMAT_AND_WRITE */ |
| // FLOPPY_DPRINTF("treat FORMAT_AND_WRITE command\n"); |
| FLOPPY_ERROR("treat FORMAT_AND_WRITE command\n"); |
| fdctrl_unimplemented(); |
| break; |
| case 0xCF: |
| /* RELATIVE_SEEK_IN */ |
| FLOPPY_DPRINTF("treat RELATIVE_SEEK_IN command\n"); |
| fdctrl.cur_drv = fdctrl.fifo[1] & 1; |
| cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1; |
| cur_drv->head = (fdctrl.fifo[1] >> 2) & 1; |
| if (fdctrl.fifo[2] > cur_drv->track) { |
| /* ERROR */ |
| fdctrl_raise_irq(0x60); |
| } else { |
| fdctrl_reset_fifo(); |
| cur_drv->track -= fdctrl.fifo[2]; |
| cur_drv->dir = 1; |
| /* Raise Interrupt */ |
| fdctrl_raise_irq(0x20); |
| } |
| break; |
| } |
| } |
| } |
