diff options
Diffstat (limited to 'hw')
| -rw-r--r-- | hw/fdc.c | 878 |
1 files changed, 361 insertions, 517 deletions
@@ -2,6 +2,7 @@ * 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 @@ -372,35 +373,34 @@ enum { }; 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_UNLOCK = 0x14, + 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 = 0x2c, FD_CMD_OPTION = 0x33, - FD_CMD_READ_TRACK = 0x42, - FD_CMD_WRITE = 0x45, - FD_CMD_READ = 0x46, - FD_CMD_WRITE_DELETED = 0x49, - FD_CMD_READ_ID = 0x4a, - FD_CMD_READ_DELETED = 0x4c, FD_CMD_RESTORE = 0x4c, - FD_CMD_FORMAT_TRACK = 0x4d, - FD_CMD_SCAN_EQUAL = 0x50, - FD_CMD_VERIFY = 0x56, - FD_CMD_SCAN_LOW_OR_EQUAL = 0x59, - FD_CMD_SCAN_HIGH_OR_EQUAL = 0x5d, FD_CMD_DRIVE_SPECIFICATION_COMMAND = 0x8e, FD_CMD_RELATIVE_SEEK_OUT = 0x8f, - FD_CMD_LOCK = 0x94, FD_CMD_FORMAT_AND_WRITE = 0xcd, FD_CMD_RELATIVE_SEEK_IN = 0xcf, }; @@ -1047,7 +1047,7 @@ static void fdctrl_set_fifo (fdctrl_t *fdctrl, int fifo_len, int do_irq) } /* Set an error: unimplemented/unknown command */ -static void fdctrl_unimplemented (fdctrl_t *fdctrl) +static void fdctrl_unimplemented (fdctrl_t *fdctrl, int direction) { #if 0 fdrive_t *cur_drv; @@ -1441,9 +1441,339 @@ static void fdctrl_format_sector (fdctrl_t *fdctrl) } } +static void fdctrl_handle_lock (fdctrl_t *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_t *fdctrl, int direction) +{ + fdrive_t *cur_drv = get_cur_drv(fdctrl); + + /* Drives position */ + fdctrl->fifo[0] = drv0(fdctrl)->track; + fdctrl->fifo[1] = drv1(fdctrl)->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(fdctrl, 10, 0); +} + +static void fdctrl_handle_version (fdctrl_t *fdctrl, int direction) +{ + /* Controller's version */ + fdctrl->fifo[0] = fdctrl->version; + fdctrl_set_fifo(fdctrl, 1, 1); +} + +static void fdctrl_handle_partid (fdctrl_t *fdctrl, int direction) +{ + fdctrl->fifo[0] = 0x41; /* Stepping 1 */ + fdctrl_set_fifo(fdctrl, 1, 0); +} + +static void fdctrl_handle_restore (fdctrl_t *fdctrl, int direction) +{ + fdrive_t *cur_drv = get_cur_drv(fdctrl); + + /* Drives position */ + drv0(fdctrl)->track = fdctrl->fifo[3]; + drv1(fdctrl)->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(fdctrl); +} + +static void fdctrl_handle_save (fdctrl_t *fdctrl, int direction) +{ + fdrive_t *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; + 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(fdctrl, 15, 1); +} + +static void fdctrl_handle_readid (fdctrl_t *fdctrl, int direction) +{ + fdrive_t *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(vm_clock) + (ticks_per_sec / 50)); +} + +static void fdctrl_handle_format_track (fdctrl_t *fdctrl, int direction) +{ + fdrive_t *cur_drv; + + fdctrl->cur_drv = 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_t *fdctrl, int direction) +{ + fdctrl->timer0 = (fdctrl->fifo[1] >> 4) & 0xF; + fdctrl->timer1 = fdctrl->fifo[2] >> 1; + fdctrl->dma_en = 1 - (fdctrl->fifo[2] & 1) ; + /* No result back */ + fdctrl_reset_fifo(fdctrl); +} + +static void fdctrl_handle_sense_drive_status (fdctrl_t *fdctrl, int direction) +{ + fdrive_t *cur_drv; + + fdctrl->cur_drv = 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) | + fdctrl->cur_drv | + 0x28; + fdctrl_set_fifo(fdctrl, 1, 0); +} + +static void fdctrl_handle_recalibrate (fdctrl_t *fdctrl, int direction) +{ + fdrive_t *cur_drv; + + fdctrl->cur_drv = 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_t *fdctrl, int direction) +{ + fdrive_t *cur_drv = get_cur_drv(fdctrl); + +#if 0 + fdctrl->fifo[0] = + fdctrl->int_status | (cur_drv->head << 2) | fdctrl->cur_drv; +#else + /* XXX: int_status handling is broken for read/write + commands, so we do this hack. It should be suppressed + ASAP */ + fdctrl->fifo[0] = + 0x20 | (cur_drv->head << 2) | fdctrl->cur_drv; +#endif + fdctrl->fifo[1] = cur_drv->track; + fdctrl_set_fifo(fdctrl, 2, 0); + fdctrl_reset_irq(fdctrl); + fdctrl->int_status = FD_SR0_RDYCHG; +} + +static void fdctrl_handle_seek (fdctrl_t *fdctrl, int direction) +{ + fdrive_t *cur_drv; + + fdctrl->cur_drv = fdctrl->fifo[1] & FD_DOR_SELMASK; + cur_drv = get_cur_drv(fdctrl); + fd_start(cur_drv); + if (fdctrl->fifo[2] <= cur_drv->track) + cur_drv->dir = 1; + else + cur_drv->dir = 0; + 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_t *fdctrl, int direction) +{ + fdrive_t *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_t *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_t *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_t *fdctrl, int direction) +{ + /* No result back */ + fdctrl_reset_fifo(fdctrl); +} + +static void fdctrl_handle_drive_specification_command (fdctrl_t *fdctrl, int direction) +{ + fdrive_t *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) | fdctrl->cur_drv; + fdctrl_set_fifo(fdctrl, 1, 1); + } +} + +static void fdctrl_handle_relative_seek_out (fdctrl_t *fdctrl, int direction) +{ + fdrive_t *cur_drv = get_cur_drv(fdctrl); + + fdctrl->cur_drv = fdctrl->fifo[1] & FD_DOR_SELMASK; + cur_drv = get_cur_drv(fdctrl); + fd_start(cur_drv); + cur_drv->dir = 0; + 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); + fdctrl_raise_irq(fdctrl, FD_SR0_SEEK); +} + +static void fdctrl_handle_relative_seek_in (fdctrl_t *fdctrl, int direction) +{ + fdrive_t *cur_drv = get_cur_drv(fdctrl); + + fdctrl->cur_drv = fdctrl->fifo[1] & FD_DOR_SELMASK; + cur_drv = get_cur_drv(fdctrl); + fd_start(cur_drv); + cur_drv->dir = 1; + 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 void fdctrl_write_data (fdctrl_t *fdctrl, uint32_t value) { fdrive_t *cur_drv; + int pos; + static const struct { + uint8_t value; + uint8_t mask; + const char* name; + int parameters; + void (*handler)(fdctrl_t *fdctrl, int direction); + int parameter; + } commands[] = { + { 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 */ + }; cur_drv = get_cur_drv(fdctrl); /* Reset mode */ @@ -1473,258 +1803,18 @@ static void fdctrl_write_data (fdctrl_t *fdctrl, uint32_t value) } if (fdctrl->data_pos == 0) { /* Command */ - switch (value & 0x5F) { - case FD_CMD_READ: - /* READ variants */ - FLOPPY_DPRINTF("READ command\n"); - /* 8 parameters cmd */ - fdctrl->data_len = 9; - goto enqueue; - case FD_CMD_READ_DELETED: - /* READ_DELETED variants */ - FLOPPY_DPRINTF("READ_DELETED command\n"); - /* 8 parameters cmd */ - fdctrl->data_len = 9; - goto enqueue; - case FD_CMD_SCAN_EQUAL: - /* SCAN_EQUAL variants */ - FLOPPY_DPRINTF("SCAN_EQUAL command\n"); - /* 8 parameters cmd */ - fdctrl->data_len = 9; - goto enqueue; - case FD_CMD_VERIFY: - /* VERIFY variants */ - FLOPPY_DPRINTF("VERIFY command\n"); - /* 8 parameters cmd */ - fdctrl->data_len = 9; - goto enqueue; - case FD_CMD_SCAN_LOW_OR_EQUAL: - /* SCAN_LOW_OR_EQUAL variants */ - FLOPPY_DPRINTF("SCAN_LOW_OR_EQUAL command\n"); - /* 8 parameters cmd */ - fdctrl->data_len = 9; - goto enqueue; - case FD_CMD_SCAN_HIGH_OR_EQUAL: - /* 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 FD_CMD_WRITE: - /* WRITE variants */ - FLOPPY_DPRINTF("WRITE command\n"); - /* 8 parameters cmd */ - fdctrl->data_len = 9; - goto enqueue; - case FD_CMD_WRITE_DELETED: - /* WRITE_DELETED variants */ - FLOPPY_DPRINTF("WRITE_DELETED command\n"); - /* 8 parameters cmd */ - fdctrl->data_len = 9; - goto enqueue; - default: - break; - } - switch (value) { - case FD_CMD_SPECIFY: - /* SPECIFY */ - FLOPPY_DPRINTF("SPECIFY command\n"); - /* 1 parameter cmd */ - fdctrl->data_len = 3; - goto enqueue; - case FD_CMD_SENSE_DRIVE_STATUS: - /* SENSE_DRIVE_STATUS */ - FLOPPY_DPRINTF("SENSE_DRIVE_STATUS command\n"); - /* 1 parameter cmd */ - fdctrl->data_len = 2; - goto enqueue; - case FD_CMD_RECALIBRATE: - /* RECALIBRATE */ - FLOPPY_DPRINTF("RECALIBRATE command\n"); - /* 1 parameter cmd */ - fdctrl->data_len = 2; - goto enqueue; - case FD_CMD_SENSE_INTERRUPT_STATUS: - /* SENSE_INTERRUPT_STATUS */ - FLOPPY_DPRINTF("SENSE_INTERRUPT_STATUS command (%02x)\n", - fdctrl->int_status); - /* No parameters cmd: returns status if no interrupt */ -#if 0 - fdctrl->fifo[0] = - fdctrl->int_status | (cur_drv->head << 2) | fdctrl->cur_drv; -#else - /* XXX: int_status handling is broken for read/write - commands, so we do this hack. It should be suppressed - ASAP */ - fdctrl->fifo[0] = - 0x20 | (cur_drv->head << 2) | fdctrl->cur_drv; -#endif - fdctrl->fifo[1] = cur_drv->track; - fdctrl_set_fifo(fdctrl, 2, 0); - fdctrl_reset_irq(fdctrl); - fdctrl->int_status = FD_SR0_RDYCHG; - return; - case FD_CMD_DUMPREG: - /* DUMPREG */ - FLOPPY_DPRINTF("DUMPREG command\n"); - /* Drives position */ - fdctrl->fifo[0] = drv0(fdctrl)->track; - fdctrl->fifo[1] = drv1(fdctrl)->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(fdctrl, 10, 0); - return; - case FD_CMD_SEEK: - /* SEEK */ - FLOPPY_DPRINTF("SEEK command\n"); - /* 2 parameters cmd */ - fdctrl->data_len = 3; - goto enqueue; - case FD_CMD_VERSION: - /* VERSION */ - FLOPPY_DPRINTF("VERSION command\n"); - /* No parameters cmd */ - /* Controller's version */ - fdctrl->fifo[0] = fdctrl->version; - fdctrl_set_fifo(fdctrl, 1, 1); - return; - case FD_CMD_PERPENDICULAR_MODE: - /* PERPENDICULAR_MODE */ - FLOPPY_DPRINTF("PERPENDICULAR_MODE command\n"); - /* 1 parameter cmd */ - fdctrl->data_len = 2; - goto enqueue; - case FD_CMD_CONFIGURE: - /* CONFIGURE */ - FLOPPY_DPRINTF("CONFIGURE command\n"); - /* 3 parameters cmd */ - fdctrl->data_len = 4; - goto enqueue; - case FD_CMD_UNLOCK: - /* UNLOCK */ - FLOPPY_DPRINTF("UNLOCK command\n"); - /* No parameters cmd */ - fdctrl->lock = 0; - fdctrl->fifo[0] = 0; - fdctrl_set_fifo(fdctrl, 1, 0); - return; - case FD_CMD_POWERDOWN_MODE: - /* POWERDOWN_MODE */ - FLOPPY_DPRINTF("POWERDOWN_MODE command\n"); - /* 2 parameters cmd */ - fdctrl->data_len = 3; - goto enqueue; - case FD_CMD_PART_ID: - /* PART_ID */ - FLOPPY_DPRINTF("PART_ID command\n"); - /* No parameters cmd */ - fdctrl->fifo[0] = 0x41; /* Stepping 1 */ - fdctrl_set_fifo(fdctrl, 1, 0); - return; - case FD_CMD_SAVE: - /* SAVE */ - FLOPPY_DPRINTF("SAVE command\n"); - /* No parameters cmd */ - fdctrl->fifo[0] = 0; - fdctrl->fifo[1] = 0; - /* Drives position */ - fdctrl->fifo[2] = drv0(fdctrl)->track; - fdctrl->fifo[3] = drv1(fdctrl)->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(fdctrl, 15, 1); - return; - case FD_CMD_OPTION: - /* OPTION */ - FLOPPY_DPRINTF("OPTION command\n"); - /* 1 parameter cmd */ - fdctrl->data_len = 2; - goto enqueue; - case FD_CMD_READ_TRACK: - /* READ_TRACK */ - FLOPPY_DPRINTF("READ_TRACK command\n"); - /* 8 parameters cmd */ - fdctrl->data_len = 9; - goto enqueue; - case FD_CMD_READ_ID: - /* READ_ID */ - FLOPPY_DPRINTF("READ_ID command\n"); - /* 1 parameter cmd */ - fdctrl->data_len = 2; - goto enqueue; - case FD_CMD_RESTORE: - /* RESTORE */ - FLOPPY_DPRINTF("RESTORE command\n"); - /* 17 parameters cmd */ - fdctrl->data_len = 18; - goto enqueue; - case FD_CMD_FORMAT_TRACK: - /* FORMAT_TRACK */ - FLOPPY_DPRINTF("FORMAT_TRACK command\n"); - /* 5 parameters cmd */ - fdctrl->data_len = 6; - goto enqueue; - case FD_CMD_DRIVE_SPECIFICATION_COMMAND: - /* DRIVE_SPECIFICATION_COMMAND */ - FLOPPY_DPRINTF("DRIVE_SPECIFICATION_COMMAND command\n"); - /* 5 parameters cmd */ - fdctrl->data_len = 6; - goto enqueue; - case FD_CMD_RELATIVE_SEEK_OUT: - /* RELATIVE_SEEK_OUT */ - FLOPPY_DPRINTF("RELATIVE_SEEK_OUT command\n"); - /* 2 parameters cmd */ - fdctrl->data_len = 3; - goto enqueue; - case FD_CMD_LOCK: - /* LOCK */ - FLOPPY_DPRINTF("LOCK command\n"); - /* No parameters cmd */ - fdctrl->lock = 1; - fdctrl->fifo[0] = 0x10; - fdctrl_set_fifo(fdctrl, 1, 1); - return; - case FD_CMD_FORMAT_AND_WRITE: - /* FORMAT_AND_WRITE */ - FLOPPY_DPRINTF("FORMAT_AND_WRITE command\n"); - /* 10 parameters cmd */ - fdctrl->data_len = 11; - goto enqueue; - case FD_CMD_RELATIVE_SEEK_IN: - /* 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(fdctrl); - return; + for (pos = 0; pos < sizeof(commands)/sizeof(commands[0]); pos++) { + if ((value & commands[pos].mask) == commands[pos].value) { + FLOPPY_DPRINTF("%s command\n", commands[pos].name); + fdctrl->data_len = commands[pos].parameters + 1; + goto enqueue; + } } + + /* Unknown command */ + FLOPPY_ERROR("unknown command: 0x%02x\n", value); + fdctrl_unimplemented(fdctrl, 0); + return; } enqueue: FLOPPY_DPRINTF("%s: %02x\n", __func__, value); @@ -1737,259 +1827,13 @@ static void fdctrl_write_data (fdctrl_t *fdctrl, uint32_t value) fdctrl_format_sector(fdctrl); return; } - switch (fdctrl->fifo[0] & 0x1F) { - case FD_CMD_READ & 0x1F: - { - /* READ variants */ - FLOPPY_DPRINTF("treat READ command\n"); - fdctrl_start_transfer(fdctrl, FD_DIR_READ); - return; - } - case FD_CMD_READ_DELETED & 0x1F: - /* READ_DELETED variants */ -// FLOPPY_DPRINTF("treat READ_DELETED command\n"); - FLOPPY_ERROR("treat READ_DELETED command\n"); - fdctrl_start_transfer_del(fdctrl, FD_DIR_READ); - return; - case FD_CMD_VERIFY & 0x1F: - /* VERIFY variants */ -// FLOPPY_DPRINTF("treat VERIFY command\n"); - FLOPPY_ERROR("treat VERIFY command\n"); - fdctrl_stop_transfer(fdctrl, FD_SR0_SEEK, 0x00, 0x00); - return; - case FD_CMD_SCAN_EQUAL & 0x1F: - /* SCAN_EQUAL variants */ -// FLOPPY_DPRINTF("treat SCAN_EQUAL command\n"); - FLOPPY_ERROR("treat SCAN_EQUAL command\n"); - fdctrl_start_transfer(fdctrl, FD_DIR_SCANE); - return; - case FD_CMD_SCAN_LOW_OR_EQUAL & 0x1F: - /* 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(fdctrl, FD_DIR_SCANL); - return; - case FD_CMD_SCAN_HIGH_OR_EQUAL & 0x1F: - /* 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(fdctrl, FD_DIR_SCANH); - return; - default: - break; - } - switch (fdctrl->fifo[0] & 0x3F) { - case FD_CMD_WRITE & 0x3F: - /* WRITE variants */ - FLOPPY_DPRINTF("treat WRITE command (%02x)\n", fdctrl->fifo[0]); - fdctrl_start_transfer(fdctrl, FD_DIR_WRITE); - return; - case FD_CMD_WRITE_DELETED & 0x3F: - /* WRITE_DELETED variants */ -// FLOPPY_DPRINTF("treat WRITE_DELETED command\n"); - FLOPPY_ERROR("treat WRITE_DELETED command\n"); - fdctrl_start_transfer_del(fdctrl, FD_DIR_WRITE); - return; - default: - break; - } - switch (fdctrl->fifo[0]) { - case FD_CMD_SPECIFY: - /* SPECIFY */ - FLOPPY_DPRINTF("treat SPECIFY command\n"); - fdctrl->timer0 = (fdctrl->fifo[1] >> 4) & 0xF; - fdctrl->timer1 = fdctrl->fifo[2] >> 1; - fdctrl->dma_en = 1 - (fdctrl->fifo[2] & 1) ; - /* No result back */ - fdctrl_reset_fifo(fdctrl); - break; - case FD_CMD_SENSE_DRIVE_STATUS: - /* SENSE_DRIVE_STATUS */ - FLOPPY_DPRINTF("treat SENSE_DRIVE_STATUS command\n"); - fdctrl->cur_drv = 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) | - fdctrl->cur_drv | - 0x28; - fdctrl_set_fifo(fdctrl, 1, 0); - break; - case FD_CMD_RECALIBRATE: - /* RECALIBRATE */ - FLOPPY_DPRINTF("treat RECALIBRATE command\n"); - fdctrl->cur_drv = 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); - break; - case FD_CMD_SEEK: - /* SEEK */ - FLOPPY_DPRINTF("treat SEEK command\n"); - fdctrl->cur_drv = fdctrl->fifo[1] & FD_DOR_SELMASK; - cur_drv = get_cur_drv(fdctrl); - fd_start(cur_drv); - if (fdctrl->fifo[2] <= cur_drv->track) - cur_drv->dir = 1; - else - cur_drv->dir = 0; - 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); - } - break; - case FD_CMD_PERPENDICULAR_MODE: - /* 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(fdctrl); - break; - case FD_CMD_CONFIGURE: - /* CONFIGURE */ - FLOPPY_DPRINTF("treat CONFIGURE command\n"); - fdctrl->config = fdctrl->fifo[2]; - fdctrl->precomp_trk = fdctrl->fifo[3]; - /* No result back */ - fdctrl_reset_fifo(fdctrl); - break; - case FD_CMD_POWERDOWN_MODE: - /* POWERDOWN_MODE */ - FLOPPY_DPRINTF("treat POWERDOWN_MODE command\n"); - fdctrl->pwrd = fdctrl->fifo[1]; - fdctrl->fifo[0] = fdctrl->fifo[1]; - fdctrl_set_fifo(fdctrl, 1, 1); - break; - case FD_CMD_OPTION: - /* OPTION */ - FLOPPY_DPRINTF("treat OPTION command\n"); - /* No result back */ - fdctrl_reset_fifo(fdctrl); - break; - case FD_CMD_READ_TRACK: - /* READ_TRACK */ - FLOPPY_DPRINTF("treat READ_TRACK command\n"); - FLOPPY_ERROR("treat READ_TRACK command\n"); - fdctrl_start_transfer(fdctrl, FD_DIR_READ); - break; - case FD_CMD_READ_ID: - /* READ_ID */ - FLOPPY_DPRINTF("treat READ_ID command\n"); - /* 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(vm_clock) + (ticks_per_sec / 50)); - break; - case FD_CMD_RESTORE: - /* RESTORE */ - FLOPPY_DPRINTF("treat RESTORE command\n"); - /* Drives position */ - drv0(fdctrl)->track = fdctrl->fifo[3]; - drv1(fdctrl)->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(fdctrl); - break; - case FD_CMD_FORMAT_TRACK: - /* FORMAT_TRACK */ - FLOPPY_DPRINTF("treat FORMAT_TRACK command\n"); - fdctrl->cur_drv = 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); - break; - case FD_CMD_DRIVE_SPECIFICATION_COMMAND: - /* 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(fdctrl, 4, 1); - } else { - fdctrl_reset_fifo(fdctrl); - } - } else if (fdctrl->data_len > 7) { - /* ERROR */ - fdctrl->fifo[0] = 0x80 | - (cur_drv->head << 2) | fdctrl->cur_drv; - fdctrl_set_fifo(fdctrl, 1, 1); - } - break; - case FD_CMD_RELATIVE_SEEK_OUT: - /* RELATIVE_SEEK_OUT */ - FLOPPY_DPRINTF("treat RELATIVE_SEEK_OUT command\n"); - fdctrl->cur_drv = fdctrl->fifo[1] & FD_DOR_SELMASK; - cur_drv = get_cur_drv(fdctrl); - fd_start(cur_drv); - cur_drv->dir = 0; - 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); - fdctrl_raise_irq(fdctrl, FD_SR0_SEEK); - break; - case FD_CMD_FORMAT_AND_WRITE: - /* FORMAT_AND_WRITE */ - FLOPPY_DPRINTF("treat FORMAT_AND_WRITE command\n"); - FLOPPY_ERROR("treat FORMAT_AND_WRITE command\n"); - fdctrl_unimplemented(fdctrl); - break; - case FD_CMD_RELATIVE_SEEK_IN: - /* RELATIVE_SEEK_IN */ - FLOPPY_DPRINTF("treat RELATIVE_SEEK_IN command\n"); - fdctrl->cur_drv = fdctrl->fifo[1] & FD_DOR_SELMASK; - cur_drv = get_cur_drv(fdctrl); - fd_start(cur_drv); - cur_drv->dir = 1; - if (fdctrl->fifo[2] > cur_drv->track) { - cur_drv->track = 0; - } else { - cur_drv->track -= fdctrl->fifo[2]; + + for (pos = 0; pos < sizeof(commands)/sizeof(commands[0]); pos++) { + if ((fdctrl->fifo[0] & commands[pos].mask) == commands[pos].value) { + FLOPPY_DPRINTF("treat %s command\n", commands[pos].name); + (*commands[pos].handler)(fdctrl, commands[pos].parameter); + break; } - fdctrl_reset_fifo(fdctrl); - /* Raise Interrupt */ - fdctrl_raise_irq(fdctrl, FD_SR0_SEEK); - break; } } } |