From 8977f3c107efa48edc19ea45f513f204bfe9d8e7 Mon Sep 17 00:00:00 2001 From: bellard Date: Mon, 5 Jan 2004 00:09:06 +0000 Subject: Floppy disk emulation (Jocelyn Mayer) git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@545 c046a42c-6fe2-441c-8c8c-71466251a162 --- hw/fdc.c | 1435 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 1435 insertions(+) create mode 100644 hw/fdc.c (limited to 'hw') diff --git a/hw/fdc.c b/hw/fdc.c new file mode 100644 index 0000000000..a47b809b44 --- /dev/null +++ b/hw/fdc.c @@ -0,0 +1,1435 @@ +/* + * 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 +#include +#include +#include + +#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 || + 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; + } + } +} -- cgit v1.2.3