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1275 |
phoenix |
/*
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* Copyright (C) 1993-1996 Bas Laarhoven,
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* (C) 1996 Kai Harrekilde-Petersen,
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* (C) 1997 Claus-Justus Heine.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; see the file COPYING. If not, write to
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the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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* $Source: /home/marcus/revision_ctrl_test/oc_cvs/cvs/or1k/linux/linux-2.4/drivers/char/ftape/lowlevel/ftape-io.c,v $
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* $Revision: 1.1.1.1 $
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* $Date: 2004-04-15 02:02:40 $
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*
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* This file contains the general control functions for the
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* QIC-40/80/3010/3020 floppy-tape driver "ftape" for Linux.
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*/
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#include <linux/errno.h>
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#include <linux/sched.h>
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#include <linux/mm.h>
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#include <asm/segment.h>
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#include <asm/system.h>
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#include <linux/ioctl.h>
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#include <linux/mtio.h>
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#include <linux/ftape.h>
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#include <linux/qic117.h>
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#include "../lowlevel/ftape-tracing.h"
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#include "../lowlevel/fdc-io.h"
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#include "../lowlevel/ftape-io.h"
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#include "../lowlevel/ftape-ctl.h"
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#include "../lowlevel/ftape-rw.h"
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#include "../lowlevel/ftape-write.h"
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#include "../lowlevel/ftape-read.h"
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#include "../lowlevel/ftape-init.h"
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#include "../lowlevel/ftape-calibr.h"
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/* Global vars.
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*/
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/* NOTE: sectors start numbering at 1, all others at 0 ! */
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ft_timeout_table ftape_timeout;
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unsigned int ftape_tape_len;
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volatile qic117_cmd_t ftape_current_command;
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const struct qic117_command_table qic117_cmds[] = QIC117_COMMANDS;
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int ftape_might_be_off_track;
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/* Local vars.
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*/
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static int diagnostic_mode;
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static unsigned int ftape_udelay_count;
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static unsigned int ftape_udelay_time;
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void ftape_udelay(unsigned int usecs)
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{
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volatile int count = (ftape_udelay_count * usecs +
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ftape_udelay_count - 1) / ftape_udelay_time;
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volatile int i;
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while (count-- > 0) {
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for (i = 0; i < 20; ++i);
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}
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}
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void ftape_udelay_calibrate(void)
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{
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ftape_calibrate("ftape_udelay",
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ftape_udelay, &ftape_udelay_count, &ftape_udelay_time);
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}
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/* Delay (msec) routine.
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*/
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void ftape_sleep(unsigned int time)
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{
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TRACE_FUN(ft_t_any);
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time *= 1000; /* msecs -> usecs */
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if (time < FT_USPT) {
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/* Time too small for scheduler, do a busy wait ! */
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ftape_udelay(time);
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} else {
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long timeout;
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unsigned long flags;
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unsigned int ticks = (time + FT_USPT - 1) / FT_USPT;
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TRACE(ft_t_any, "%d msec, %d ticks", time/1000, ticks);
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timeout = ticks;
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save_flags(flags);
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sti();
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set_current_state(TASK_INTERRUPTIBLE);
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do {
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/* Mmm. Isn't current->blocked == 0xffffffff ?
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*/
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if (signal_pending(current)) {
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TRACE(ft_t_err,
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"awoken by non-blocked signal :-(");
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break; /* exit on signal */
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}
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while (current->state != TASK_RUNNING) {
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timeout = schedule_timeout(timeout);
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}
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} while (timeout);
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restore_flags(flags);
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}
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TRACE_EXIT;
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}
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/* send a command or parameter to the drive
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* Generates # of step pulses.
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*/
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static inline int ft_send_to_drive(int arg)
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{
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/* Always wait for a command_timeout period to separate
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* individuals commands and/or parameters.
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*/
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ftape_sleep(3 * FT_MILLISECOND);
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/* Keep cylinder nr within range, step towards home if possible.
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*/
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if (ftape_current_cylinder >= arg) {
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return fdc_seek(ftape_current_cylinder - arg);
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} else {
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return fdc_seek(ftape_current_cylinder + arg);
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}
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}
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/* forward */ int ftape_report_raw_drive_status(int *status);
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static int ft_check_cmd_restrictions(qic117_cmd_t command)
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{
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int status = -1;
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TRACE_FUN(ft_t_any);
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TRACE(ft_t_flow, "%s", qic117_cmds[command].name);
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/* A new motion command during an uninterruptible (motion)
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* command requires a ready status before the new command can
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* be issued. Otherwise a new motion command needs to be
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* checked against required status.
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*/
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if (qic117_cmds[command].cmd_type == motion &&
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qic117_cmds[ftape_current_command].non_intr) {
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ftape_report_raw_drive_status(&status);
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if ((status & QIC_STATUS_READY) == 0) {
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TRACE(ft_t_noise,
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"motion cmd (%d) during non-intr cmd (%d)",
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command, ftape_current_command);
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TRACE(ft_t_noise, "waiting until drive gets ready");
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ftape_ready_wait(ftape_timeout.seek,
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&status);
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}
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}
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if (qic117_cmds[command].mask != 0) {
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__u8 difference;
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/* Some commands do require a certain status:
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*/
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if (status == -1) { /* not yet set */
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ftape_report_raw_drive_status(&status);
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}
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difference = ((status ^ qic117_cmds[command].state) &
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qic117_cmds[command].mask);
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/* Wait until the drive gets
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* ready. This may last forever if
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* the drive never gets ready...
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*/
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while ((difference & QIC_STATUS_READY) != 0) {
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TRACE(ft_t_noise, "command %d issued while not ready",
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command);
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TRACE(ft_t_noise, "waiting until drive gets ready");
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if (ftape_ready_wait(ftape_timeout.seek,
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&status) == -EINTR) {
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/* Bail out on signal !
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*/
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TRACE_ABORT(-EINTR, ft_t_warn,
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"interrupted by non-blockable signal");
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}
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difference = ((status ^ qic117_cmds[command].state) &
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qic117_cmds[command].mask);
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}
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while ((difference & QIC_STATUS_ERROR) != 0) {
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int err;
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qic117_cmd_t cmd;
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TRACE(ft_t_noise,
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"command %d issued while error pending",
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command);
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TRACE(ft_t_noise, "clearing error status");
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ftape_report_error(&err, &cmd, 1);
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ftape_report_raw_drive_status(&status);
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difference = ((status ^ qic117_cmds[command].state) &
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qic117_cmds[command].mask);
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if ((difference & QIC_STATUS_ERROR) != 0) {
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/* Bail out on fatal signal !
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*/
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FT_SIGNAL_EXIT(_NEVER_BLOCK);
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}
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}
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if (difference) {
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/* Any remaining difference can't be solved
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* here.
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*/
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if (difference & (QIC_STATUS_CARTRIDGE_PRESENT |
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QIC_STATUS_NEW_CARTRIDGE |
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QIC_STATUS_REFERENCED)) {
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TRACE(ft_t_warn,
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"Fatal: tape removed or reinserted !");
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ft_failure = 1;
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} else {
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TRACE(ft_t_err, "wrong state: 0x%02x should be: 0x%02x",
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status & qic117_cmds[command].mask,
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qic117_cmds[command].state);
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}
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TRACE_EXIT -EIO;
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}
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if (~status & QIC_STATUS_READY & qic117_cmds[command].mask) {
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TRACE_ABORT(-EBUSY, ft_t_err, "Bad: still busy!");
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}
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}
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TRACE_EXIT 0;
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}
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/* Issue a tape command:
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*/
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int ftape_command(qic117_cmd_t command)
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{
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int result = 0;
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static int level;
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TRACE_FUN(ft_t_any);
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if ((unsigned int)command > NR_ITEMS(qic117_cmds)) {
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/* This is a bug we'll want to know about too.
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*/
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TRACE_ABORT(-EIO, ft_t_bug, "bug - bad command: %d", command);
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}
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if (++level > 5) { /* This is a bug we'll want to know about. */
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--level;
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TRACE_ABORT(-EIO, ft_t_bug, "bug - recursion for command: %d",
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command);
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}
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/* disable logging and restriction check for some commands,
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* check all other commands that have a prescribed starting
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* status.
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*/
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if (diagnostic_mode) {
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TRACE(ft_t_flow, "diagnostic command %d", command);
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} else if (command == QIC_REPORT_DRIVE_STATUS ||
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command == QIC_REPORT_NEXT_BIT) {
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TRACE(ft_t_any, "%s", qic117_cmds[command].name);
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} else {
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TRACE_CATCH(ft_check_cmd_restrictions(command), --level);
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}
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/* Now all conditions are met or result was < 0.
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*/
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result = ft_send_to_drive((unsigned int)command);
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if (qic117_cmds[command].cmd_type == motion &&
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command != QIC_LOGICAL_FORWARD && command != QIC_STOP_TAPE) {
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ft_location.known = 0;
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}
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ftape_current_command = command;
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--level;
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TRACE_EXIT result;
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| 270 |
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}
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| 271 |
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| 272 |
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/* Send a tape command parameter:
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* Generates command # of step pulses.
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* Skips tape-status call !
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| 275 |
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*/
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| 276 |
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int ftape_parameter(unsigned int parameter)
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{
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| 278 |
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TRACE_FUN(ft_t_any);
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| 279 |
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| 280 |
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TRACE(ft_t_flow, "called with parameter = %d", parameter);
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| 281 |
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TRACE_EXIT ft_send_to_drive(parameter + 2);
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| 282 |
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}
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| 283 |
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| 284 |
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/* Wait for the drive to get ready.
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| 285 |
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* timeout time in milli-seconds
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| 286 |
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* Returned status is valid if result != -EIO
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| 287 |
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*
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| 288 |
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* Should we allow to be killed by SIGINT? (^C)
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| 289 |
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* Would be nice at least for large timeouts.
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| 290 |
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*/
|
| 291 |
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int ftape_ready_wait(unsigned int timeout, int *status)
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| 292 |
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{
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| 293 |
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unsigned long t0;
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| 294 |
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unsigned int poll_delay;
|
| 295 |
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int signal_retries;
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| 296 |
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TRACE_FUN(ft_t_any);
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| 297 |
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|
| 298 |
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/* the following ** REALLY ** reduces the system load when
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| 299 |
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* e.g. one simply rewinds or retensions. The tape is slow
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| 300 |
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* anyway. It is really not necessary to detect error
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| 301 |
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* conditions with 1/10 seconds granularity
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| 302 |
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*
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| 303 |
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* On my AMD 133MHZ 486: 100 ms: 23% system load
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| 304 |
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* 1 sec: 5%
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| 305 |
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* 5 sec: 0.6%, yeah
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| 306 |
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*/
|
| 307 |
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if (timeout <= FT_SECOND) {
|
| 308 |
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poll_delay = 100 * FT_MILLISECOND;
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| 309 |
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signal_retries = 20; /* two seconds */
|
| 310 |
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} else if (timeout < 20 * FT_SECOND) {
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| 311 |
|
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TRACE(ft_t_flow, "setting poll delay to 1 second");
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| 312 |
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poll_delay = FT_SECOND;
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| 313 |
|
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signal_retries = 2; /* two seconds */
|
| 314 |
|
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} else {
|
| 315 |
|
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TRACE(ft_t_flow, "setting poll delay to 5 seconds");
|
| 316 |
|
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poll_delay = 5 * FT_SECOND;
|
| 317 |
|
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signal_retries = 1; /* five seconds */
|
| 318 |
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}
|
| 319 |
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for (;;) {
|
| 320 |
|
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t0 = jiffies;
|
| 321 |
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TRACE_CATCH(ftape_report_raw_drive_status(status),);
|
| 322 |
|
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if (*status & QIC_STATUS_READY) {
|
| 323 |
|
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TRACE_EXIT 0;
|
| 324 |
|
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}
|
| 325 |
|
|
if (!signal_retries--) {
|
| 326 |
|
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FT_SIGNAL_EXIT(_NEVER_BLOCK);
|
| 327 |
|
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}
|
| 328 |
|
|
if ((int)timeout >= 0) {
|
| 329 |
|
|
/* this will fail when jiffies wraps around about
|
| 330 |
|
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* once every year :-)
|
| 331 |
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*/
|
| 332 |
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|
timeout -= ((jiffies - t0) * FT_SECOND) / HZ;
|
| 333 |
|
|
if (timeout <= 0) {
|
| 334 |
|
|
TRACE_ABORT(-ETIME, ft_t_err, "timeout");
|
| 335 |
|
|
}
|
| 336 |
|
|
ftape_sleep(poll_delay);
|
| 337 |
|
|
timeout -= poll_delay;
|
| 338 |
|
|
} else {
|
| 339 |
|
|
ftape_sleep(poll_delay);
|
| 340 |
|
|
}
|
| 341 |
|
|
}
|
| 342 |
|
|
TRACE_EXIT -ETIME;
|
| 343 |
|
|
}
|
| 344 |
|
|
|
| 345 |
|
|
/* Issue command and wait up to timeout milli seconds for drive ready
|
| 346 |
|
|
*/
|
| 347 |
|
|
int ftape_command_wait(qic117_cmd_t command, unsigned int timeout, int *status)
|
| 348 |
|
|
{
|
| 349 |
|
|
int result;
|
| 350 |
|
|
|
| 351 |
|
|
/* Drive should be ready, issue command
|
| 352 |
|
|
*/
|
| 353 |
|
|
result = ftape_command(command);
|
| 354 |
|
|
if (result >= 0) {
|
| 355 |
|
|
result = ftape_ready_wait(timeout, status);
|
| 356 |
|
|
}
|
| 357 |
|
|
return result;
|
| 358 |
|
|
}
|
| 359 |
|
|
|
| 360 |
|
|
int ftape_parameter_wait(unsigned int parm, unsigned int timeout, int *status)
|
| 361 |
|
|
{
|
| 362 |
|
|
int result;
|
| 363 |
|
|
|
| 364 |
|
|
/* Drive should be ready, issue command
|
| 365 |
|
|
*/
|
| 366 |
|
|
result = ftape_parameter(parm);
|
| 367 |
|
|
if (result >= 0) {
|
| 368 |
|
|
result = ftape_ready_wait(timeout, status);
|
| 369 |
|
|
}
|
| 370 |
|
|
return result;
|
| 371 |
|
|
}
|
| 372 |
|
|
|
| 373 |
|
|
/*--------------------------------------------------------------------------
|
| 374 |
|
|
* Report operations
|
| 375 |
|
|
*/
|
| 376 |
|
|
|
| 377 |
|
|
/* Query the drive about its status. The command is sent and
|
| 378 |
|
|
result_length bits of status are returned (2 extra bits are read
|
| 379 |
|
|
for start and stop). */
|
| 380 |
|
|
|
| 381 |
|
|
int ftape_report_operation(int *status,
|
| 382 |
|
|
qic117_cmd_t command,
|
| 383 |
|
|
int result_length)
|
| 384 |
|
|
{
|
| 385 |
|
|
int i, st3;
|
| 386 |
|
|
unsigned int t0;
|
| 387 |
|
|
unsigned int dt;
|
| 388 |
|
|
TRACE_FUN(ft_t_any);
|
| 389 |
|
|
|
| 390 |
|
|
TRACE_CATCH(ftape_command(command),);
|
| 391 |
|
|
t0 = ftape_timestamp();
|
| 392 |
|
|
i = 0;
|
| 393 |
|
|
do {
|
| 394 |
|
|
++i;
|
| 395 |
|
|
ftape_sleep(3 * FT_MILLISECOND); /* see remark below */
|
| 396 |
|
|
TRACE_CATCH(fdc_sense_drive_status(&st3),);
|
| 397 |
|
|
dt = ftape_timediff(t0, ftape_timestamp());
|
| 398 |
|
|
/* Ack should be asserted within Ttimout + Tack = 6 msec.
|
| 399 |
|
|
* Looks like some drives fail to do this so extend this
|
| 400 |
|
|
* period to 300 msec.
|
| 401 |
|
|
*/
|
| 402 |
|
|
} while (!(st3 & ST3_TRACK_0) && dt < 300000);
|
| 403 |
|
|
if (!(st3 & ST3_TRACK_0)) {
|
| 404 |
|
|
TRACE(ft_t_err,
|
| 405 |
|
|
"No acknowledge after %u msec. (%i iter)", dt / 1000, i);
|
| 406 |
|
|
TRACE_ABORT(-EIO, ft_t_err, "timeout on Acknowledge");
|
| 407 |
|
|
}
|
| 408 |
|
|
/* dt may be larger than expected because of other tasks
|
| 409 |
|
|
* scheduled while we were sleeping.
|
| 410 |
|
|
*/
|
| 411 |
|
|
if (i > 1 && dt > 6000) {
|
| 412 |
|
|
TRACE(ft_t_err, "Acknowledge after %u msec. (%i iter)",
|
| 413 |
|
|
dt / 1000, i);
|
| 414 |
|
|
}
|
| 415 |
|
|
*status = 0;
|
| 416 |
|
|
for (i = 0; i < result_length + 1; i++) {
|
| 417 |
|
|
TRACE_CATCH(ftape_command(QIC_REPORT_NEXT_BIT),);
|
| 418 |
|
|
TRACE_CATCH(fdc_sense_drive_status(&st3),);
|
| 419 |
|
|
if (i < result_length) {
|
| 420 |
|
|
*status |= ((st3 & ST3_TRACK_0) ? 1 : 0) << i;
|
| 421 |
|
|
} else if ((st3 & ST3_TRACK_0) == 0) {
|
| 422 |
|
|
TRACE_ABORT(-EIO, ft_t_err, "missing status stop bit");
|
| 423 |
|
|
}
|
| 424 |
|
|
}
|
| 425 |
|
|
/* this command will put track zero and index back into normal state */
|
| 426 |
|
|
(void)ftape_command(QIC_REPORT_NEXT_BIT);
|
| 427 |
|
|
TRACE_EXIT 0;
|
| 428 |
|
|
}
|
| 429 |
|
|
|
| 430 |
|
|
/* Report the current drive status. */
|
| 431 |
|
|
|
| 432 |
|
|
int ftape_report_raw_drive_status(int *status)
|
| 433 |
|
|
{
|
| 434 |
|
|
int result;
|
| 435 |
|
|
int count = 0;
|
| 436 |
|
|
TRACE_FUN(ft_t_any);
|
| 437 |
|
|
|
| 438 |
|
|
do {
|
| 439 |
|
|
result = ftape_report_operation(status,
|
| 440 |
|
|
QIC_REPORT_DRIVE_STATUS, 8);
|
| 441 |
|
|
} while (result < 0 && ++count <= 3);
|
| 442 |
|
|
if (result < 0) {
|
| 443 |
|
|
TRACE_ABORT(-EIO, ft_t_err,
|
| 444 |
|
|
"report_operation failed after %d trials", count);
|
| 445 |
|
|
}
|
| 446 |
|
|
if ((*status & 0xff) == 0xff) {
|
| 447 |
|
|
TRACE_ABORT(-EIO, ft_t_err,
|
| 448 |
|
|
"impossible drive status 0xff");
|
| 449 |
|
|
}
|
| 450 |
|
|
if (*status & QIC_STATUS_READY) {
|
| 451 |
|
|
ftape_current_command = QIC_NO_COMMAND; /* completed */
|
| 452 |
|
|
}
|
| 453 |
|
|
ft_last_status.status.drive_status = (__u8)(*status & 0xff);
|
| 454 |
|
|
TRACE_EXIT 0;
|
| 455 |
|
|
}
|
| 456 |
|
|
|
| 457 |
|
|
int ftape_report_drive_status(int *status)
|
| 458 |
|
|
{
|
| 459 |
|
|
TRACE_FUN(ft_t_any);
|
| 460 |
|
|
|
| 461 |
|
|
TRACE_CATCH(ftape_report_raw_drive_status(status),);
|
| 462 |
|
|
if (*status & QIC_STATUS_NEW_CARTRIDGE ||
|
| 463 |
|
|
!(*status & QIC_STATUS_CARTRIDGE_PRESENT)) {
|
| 464 |
|
|
ft_failure = 1; /* will inhibit further operations */
|
| 465 |
|
|
TRACE_EXIT -EIO;
|
| 466 |
|
|
}
|
| 467 |
|
|
if (*status & QIC_STATUS_READY && *status & QIC_STATUS_ERROR) {
|
| 468 |
|
|
/* Let caller handle all errors */
|
| 469 |
|
|
TRACE_ABORT(1, ft_t_warn, "warning: error status set!");
|
| 470 |
|
|
}
|
| 471 |
|
|
TRACE_EXIT 0;
|
| 472 |
|
|
}
|
| 473 |
|
|
|
| 474 |
|
|
int ftape_report_error(unsigned int *error,
|
| 475 |
|
|
qic117_cmd_t *command, int report)
|
| 476 |
|
|
{
|
| 477 |
|
|
static const ftape_error ftape_errors[] = QIC117_ERRORS;
|
| 478 |
|
|
int code;
|
| 479 |
|
|
TRACE_FUN(ft_t_any);
|
| 480 |
|
|
|
| 481 |
|
|
TRACE_CATCH(ftape_report_operation(&code, QIC_REPORT_ERROR_CODE, 16),);
|
| 482 |
|
|
*error = (unsigned int)(code & 0xff);
|
| 483 |
|
|
*command = (qic117_cmd_t)((code>>8)&0xff);
|
| 484 |
|
|
/* remember hardware status, maybe useful for status ioctls
|
| 485 |
|
|
*/
|
| 486 |
|
|
ft_last_error.error.command = (__u8)*command;
|
| 487 |
|
|
ft_last_error.error.error = (__u8)*error;
|
| 488 |
|
|
if (!report) {
|
| 489 |
|
|
TRACE_EXIT 0;
|
| 490 |
|
|
}
|
| 491 |
|
|
if (*error == 0) {
|
| 492 |
|
|
TRACE_ABORT(0, ft_t_info, "No error");
|
| 493 |
|
|
}
|
| 494 |
|
|
TRACE(ft_t_info, "errorcode: %d", *error);
|
| 495 |
|
|
if (*error < NR_ITEMS(ftape_errors)) {
|
| 496 |
|
|
TRACE(ft_t_noise, "%sFatal ERROR:",
|
| 497 |
|
|
(ftape_errors[*error].fatal ? "" : "Non-"));
|
| 498 |
|
|
TRACE(ft_t_noise, "%s ...", ftape_errors[*error].message);
|
| 499 |
|
|
} else {
|
| 500 |
|
|
TRACE(ft_t_noise, "Unknown ERROR !");
|
| 501 |
|
|
}
|
| 502 |
|
|
if ((unsigned int)*command < NR_ITEMS(qic117_cmds) &&
|
| 503 |
|
|
qic117_cmds[*command].name != NULL) {
|
| 504 |
|
|
TRACE(ft_t_noise, "... caused by command \'%s\'",
|
| 505 |
|
|
qic117_cmds[*command].name);
|
| 506 |
|
|
} else {
|
| 507 |
|
|
TRACE(ft_t_noise, "... caused by unknown command %d",
|
| 508 |
|
|
*command);
|
| 509 |
|
|
}
|
| 510 |
|
|
TRACE_EXIT 0;
|
| 511 |
|
|
}
|
| 512 |
|
|
|
| 513 |
|
|
int ftape_in_error_state(int status)
|
| 514 |
|
|
{
|
| 515 |
|
|
TRACE_FUN(ft_t_any);
|
| 516 |
|
|
|
| 517 |
|
|
if ((status & QIC_STATUS_READY) && (status & QIC_STATUS_ERROR)) {
|
| 518 |
|
|
TRACE_ABORT(1, ft_t_warn, "warning: error status set!");
|
| 519 |
|
|
}
|
| 520 |
|
|
TRACE_EXIT 0;
|
| 521 |
|
|
}
|
| 522 |
|
|
|
| 523 |
|
|
int ftape_report_configuration(qic_model *model,
|
| 524 |
|
|
unsigned int *rate,
|
| 525 |
|
|
int *qic_std,
|
| 526 |
|
|
int *tape_len)
|
| 527 |
|
|
{
|
| 528 |
|
|
int result;
|
| 529 |
|
|
int config;
|
| 530 |
|
|
int status;
|
| 531 |
|
|
static const unsigned int qic_rates[ 4] = { 250, 2000, 500, 1000 };
|
| 532 |
|
|
TRACE_FUN(ft_t_any);
|
| 533 |
|
|
|
| 534 |
|
|
result = ftape_report_operation(&config,
|
| 535 |
|
|
QIC_REPORT_DRIVE_CONFIGURATION, 8);
|
| 536 |
|
|
if (result < 0) {
|
| 537 |
|
|
ft_last_status.status.drive_config = (__u8)0x00;
|
| 538 |
|
|
*model = prehistoric;
|
| 539 |
|
|
*rate = 500;
|
| 540 |
|
|
*qic_std = QIC_TAPE_QIC40;
|
| 541 |
|
|
*tape_len = 205;
|
| 542 |
|
|
TRACE_EXIT 0;
|
| 543 |
|
|
} else {
|
| 544 |
|
|
ft_last_status.status.drive_config = (__u8)(config & 0xff);
|
| 545 |
|
|
}
|
| 546 |
|
|
*rate = qic_rates[(config & QIC_CONFIG_RATE_MASK) >> QIC_CONFIG_RATE_SHIFT];
|
| 547 |
|
|
result = ftape_report_operation(&status, QIC_REPORT_TAPE_STATUS, 8);
|
| 548 |
|
|
if (result < 0) {
|
| 549 |
|
|
ft_last_status.status.tape_status = (__u8)0x00;
|
| 550 |
|
|
/* pre- QIC117 rev C spec. drive, QIC_CONFIG_80 bit is valid.
|
| 551 |
|
|
*/
|
| 552 |
|
|
*qic_std = (config & QIC_CONFIG_80) ?
|
| 553 |
|
|
QIC_TAPE_QIC80 : QIC_TAPE_QIC40;
|
| 554 |
|
|
/* ?? how's about 425ft tapes? */
|
| 555 |
|
|
*tape_len = (config & QIC_CONFIG_LONG) ? 307 : 0;
|
| 556 |
|
|
*model = pre_qic117c;
|
| 557 |
|
|
result = 0;
|
| 558 |
|
|
} else {
|
| 559 |
|
|
ft_last_status.status.tape_status = (__u8)(status & 0xff);
|
| 560 |
|
|
*model = post_qic117b;
|
| 561 |
|
|
TRACE(ft_t_any, "report tape status result = %02x", status);
|
| 562 |
|
|
/* post- QIC117 rev C spec. drive, QIC_CONFIG_80 bit is
|
| 563 |
|
|
* invalid.
|
| 564 |
|
|
*/
|
| 565 |
|
|
switch (status & QIC_TAPE_STD_MASK) {
|
| 566 |
|
|
case QIC_TAPE_QIC40:
|
| 567 |
|
|
case QIC_TAPE_QIC80:
|
| 568 |
|
|
case QIC_TAPE_QIC3020:
|
| 569 |
|
|
case QIC_TAPE_QIC3010:
|
| 570 |
|
|
*qic_std = status & QIC_TAPE_STD_MASK;
|
| 571 |
|
|
break;
|
| 572 |
|
|
default:
|
| 573 |
|
|
*qic_std = -1;
|
| 574 |
|
|
break;
|
| 575 |
|
|
}
|
| 576 |
|
|
switch (status & QIC_TAPE_LEN_MASK) {
|
| 577 |
|
|
case QIC_TAPE_205FT:
|
| 578 |
|
|
/* 205 or 425+ ft 550 Oe tape */
|
| 579 |
|
|
*tape_len = 0;
|
| 580 |
|
|
break;
|
| 581 |
|
|
case QIC_TAPE_307FT:
|
| 582 |
|
|
/* 307.5 ft 550 Oe Extended Length (XL) tape */
|
| 583 |
|
|
*tape_len = 307;
|
| 584 |
|
|
break;
|
| 585 |
|
|
case QIC_TAPE_VARIABLE:
|
| 586 |
|
|
/* Variable length 550 Oe tape */
|
| 587 |
|
|
*tape_len = 0;
|
| 588 |
|
|
break;
|
| 589 |
|
|
case QIC_TAPE_1100FT:
|
| 590 |
|
|
/* 1100 ft 550 Oe tape */
|
| 591 |
|
|
*tape_len = 1100;
|
| 592 |
|
|
break;
|
| 593 |
|
|
case QIC_TAPE_FLEX:
|
| 594 |
|
|
/* Variable length 900 Oe tape */
|
| 595 |
|
|
*tape_len = 0;
|
| 596 |
|
|
break;
|
| 597 |
|
|
default:
|
| 598 |
|
|
*tape_len = -1;
|
| 599 |
|
|
break;
|
| 600 |
|
|
}
|
| 601 |
|
|
if (*qic_std == -1 || *tape_len == -1) {
|
| 602 |
|
|
TRACE(ft_t_any,
|
| 603 |
|
|
"post qic-117b spec drive with unknown tape");
|
| 604 |
|
|
}
|
| 605 |
|
|
result = *tape_len == -1 ? -EIO : 0;
|
| 606 |
|
|
if (status & QIC_TAPE_WIDE) {
|
| 607 |
|
|
switch (*qic_std) {
|
| 608 |
|
|
case QIC_TAPE_QIC80:
|
| 609 |
|
|
TRACE(ft_t_info, "TR-1 tape detected");
|
| 610 |
|
|
break;
|
| 611 |
|
|
case QIC_TAPE_QIC3010:
|
| 612 |
|
|
TRACE(ft_t_info, "TR-2 tape detected");
|
| 613 |
|
|
break;
|
| 614 |
|
|
case QIC_TAPE_QIC3020:
|
| 615 |
|
|
TRACE(ft_t_info, "TR-3 tape detected");
|
| 616 |
|
|
break;
|
| 617 |
|
|
default:
|
| 618 |
|
|
TRACE(ft_t_warn,
|
| 619 |
|
|
"Unknown Travan tape type detected");
|
| 620 |
|
|
break;
|
| 621 |
|
|
}
|
| 622 |
|
|
}
|
| 623 |
|
|
}
|
| 624 |
|
|
TRACE_EXIT (result < 0) ? -EIO : 0;
|
| 625 |
|
|
}
|
| 626 |
|
|
|
| 627 |
|
|
int ftape_report_rom_version(int *version)
|
| 628 |
|
|
{
|
| 629 |
|
|
|
| 630 |
|
|
if (ftape_report_operation(version, QIC_REPORT_ROM_VERSION, 8) < 0) {
|
| 631 |
|
|
return -EIO;
|
| 632 |
|
|
} else {
|
| 633 |
|
|
return 0;
|
| 634 |
|
|
}
|
| 635 |
|
|
}
|
| 636 |
|
|
|
| 637 |
|
|
int ftape_report_signature(int *signature)
|
| 638 |
|
|
{
|
| 639 |
|
|
int result;
|
| 640 |
|
|
|
| 641 |
|
|
result = ftape_command(28);
|
| 642 |
|
|
result = ftape_report_operation(signature, 9, 8);
|
| 643 |
|
|
result = ftape_command(30);
|
| 644 |
|
|
return (result < 0) ? -EIO : 0;
|
| 645 |
|
|
}
|
| 646 |
|
|
|
| 647 |
|
|
void ftape_report_vendor_id(unsigned int *id)
|
| 648 |
|
|
{
|
| 649 |
|
|
int result;
|
| 650 |
|
|
TRACE_FUN(ft_t_any);
|
| 651 |
|
|
|
| 652 |
|
|
/* We'll try to get a vendor id from the drive. First
|
| 653 |
|
|
* according to the QIC-117 spec, a 16-bit id is requested.
|
| 654 |
|
|
* If that fails we'll try an 8-bit version, otherwise we'll
|
| 655 |
|
|
* try an undocumented query.
|
| 656 |
|
|
*/
|
| 657 |
|
|
result = ftape_report_operation((int *) id, QIC_REPORT_VENDOR_ID, 16);
|
| 658 |
|
|
if (result < 0) {
|
| 659 |
|
|
result = ftape_report_operation((int *) id,
|
| 660 |
|
|
QIC_REPORT_VENDOR_ID, 8);
|
| 661 |
|
|
if (result < 0) {
|
| 662 |
|
|
/* The following is an undocumented call found
|
| 663 |
|
|
* in the CMS code.
|
| 664 |
|
|
*/
|
| 665 |
|
|
result = ftape_report_operation((int *) id, 24, 8);
|
| 666 |
|
|
if (result < 0) {
|
| 667 |
|
|
*id = UNKNOWN_VENDOR;
|
| 668 |
|
|
} else {
|
| 669 |
|
|
TRACE(ft_t_noise, "got old 8 bit id: %04x",
|
| 670 |
|
|
*id);
|
| 671 |
|
|
*id |= 0x20000;
|
| 672 |
|
|
}
|
| 673 |
|
|
} else {
|
| 674 |
|
|
TRACE(ft_t_noise, "got 8 bit id: %04x", *id);
|
| 675 |
|
|
*id |= 0x10000;
|
| 676 |
|
|
}
|
| 677 |
|
|
} else {
|
| 678 |
|
|
TRACE(ft_t_noise, "got 16 bit id: %04x", *id);
|
| 679 |
|
|
}
|
| 680 |
|
|
if (*id == 0x0047) {
|
| 681 |
|
|
int version;
|
| 682 |
|
|
int sign;
|
| 683 |
|
|
|
| 684 |
|
|
if (ftape_report_rom_version(&version) < 0) {
|
| 685 |
|
|
TRACE(ft_t_bug, "report rom version failed");
|
| 686 |
|
|
TRACE_EXIT;
|
| 687 |
|
|
}
|
| 688 |
|
|
TRACE(ft_t_noise, "CMS rom version: %d", version);
|
| 689 |
|
|
ftape_command(QIC_ENTER_DIAGNOSTIC_1);
|
| 690 |
|
|
ftape_command(QIC_ENTER_DIAGNOSTIC_1);
|
| 691 |
|
|
diagnostic_mode = 1;
|
| 692 |
|
|
if (ftape_report_operation(&sign, 9, 8) < 0) {
|
| 693 |
|
|
unsigned int error;
|
| 694 |
|
|
qic117_cmd_t command;
|
| 695 |
|
|
|
| 696 |
|
|
ftape_report_error(&error, &command, 1);
|
| 697 |
|
|
ftape_command(QIC_ENTER_PRIMARY_MODE);
|
| 698 |
|
|
diagnostic_mode = 0;
|
| 699 |
|
|
TRACE_EXIT; /* failure ! */
|
| 700 |
|
|
} else {
|
| 701 |
|
|
TRACE(ft_t_noise, "CMS signature: %02x", sign);
|
| 702 |
|
|
}
|
| 703 |
|
|
if (sign == 0xa5) {
|
| 704 |
|
|
result = ftape_report_operation(&sign, 37, 8);
|
| 705 |
|
|
if (result < 0) {
|
| 706 |
|
|
if (version >= 63) {
|
| 707 |
|
|
*id = 0x8880;
|
| 708 |
|
|
TRACE(ft_t_noise,
|
| 709 |
|
|
"This is an Iomega drive !");
|
| 710 |
|
|
} else {
|
| 711 |
|
|
*id = 0x0047;
|
| 712 |
|
|
TRACE(ft_t_noise,
|
| 713 |
|
|
"This is a real CMS drive !");
|
| 714 |
|
|
}
|
| 715 |
|
|
} else {
|
| 716 |
|
|
*id = 0x0047;
|
| 717 |
|
|
TRACE(ft_t_noise, "CMS status: %d", sign);
|
| 718 |
|
|
}
|
| 719 |
|
|
} else {
|
| 720 |
|
|
*id = UNKNOWN_VENDOR;
|
| 721 |
|
|
}
|
| 722 |
|
|
ftape_command(QIC_ENTER_PRIMARY_MODE);
|
| 723 |
|
|
diagnostic_mode = 0;
|
| 724 |
|
|
}
|
| 725 |
|
|
TRACE_EXIT;
|
| 726 |
|
|
}
|
| 727 |
|
|
|
| 728 |
|
|
static int qic_rate_code(unsigned int rate)
|
| 729 |
|
|
{
|
| 730 |
|
|
switch (rate) {
|
| 731 |
|
|
case 250:
|
| 732 |
|
|
return QIC_CONFIG_RATE_250;
|
| 733 |
|
|
case 500:
|
| 734 |
|
|
return QIC_CONFIG_RATE_500;
|
| 735 |
|
|
case 1000:
|
| 736 |
|
|
return QIC_CONFIG_RATE_1000;
|
| 737 |
|
|
case 2000:
|
| 738 |
|
|
return QIC_CONFIG_RATE_2000;
|
| 739 |
|
|
default:
|
| 740 |
|
|
return QIC_CONFIG_RATE_500;
|
| 741 |
|
|
}
|
| 742 |
|
|
}
|
| 743 |
|
|
|
| 744 |
|
|
static int ftape_set_rate_test(unsigned int *max_rate)
|
| 745 |
|
|
{
|
| 746 |
|
|
unsigned int error;
|
| 747 |
|
|
qic117_cmd_t command;
|
| 748 |
|
|
int status;
|
| 749 |
|
|
int supported = 0;
|
| 750 |
|
|
TRACE_FUN(ft_t_any);
|
| 751 |
|
|
|
| 752 |
|
|
/* Check if the drive does support the select rate command
|
| 753 |
|
|
* by testing all different settings. If any one is accepted
|
| 754 |
|
|
* we assume the command is supported, else not.
|
| 755 |
|
|
*/
|
| 756 |
|
|
for (*max_rate = 2000; *max_rate >= 250; *max_rate /= 2) {
|
| 757 |
|
|
if (ftape_command(QIC_SELECT_RATE) < 0) {
|
| 758 |
|
|
continue;
|
| 759 |
|
|
}
|
| 760 |
|
|
if (ftape_parameter_wait(qic_rate_code(*max_rate),
|
| 761 |
|
|
1 * FT_SECOND, &status) < 0) {
|
| 762 |
|
|
continue;
|
| 763 |
|
|
}
|
| 764 |
|
|
if (status & QIC_STATUS_ERROR) {
|
| 765 |
|
|
ftape_report_error(&error, &command, 0);
|
| 766 |
|
|
continue;
|
| 767 |
|
|
}
|
| 768 |
|
|
supported = 1; /* did accept a request */
|
| 769 |
|
|
break;
|
| 770 |
|
|
}
|
| 771 |
|
|
TRACE(ft_t_noise, "Select Rate command is%s supported",
|
| 772 |
|
|
supported ? "" : " not");
|
| 773 |
|
|
TRACE_EXIT supported;
|
| 774 |
|
|
}
|
| 775 |
|
|
|
| 776 |
|
|
int ftape_set_data_rate(unsigned int new_rate /* Kbps */, unsigned int qic_std)
|
| 777 |
|
|
{
|
| 778 |
|
|
int status;
|
| 779 |
|
|
int result = 0;
|
| 780 |
|
|
unsigned int data_rate = new_rate;
|
| 781 |
|
|
static int supported;
|
| 782 |
|
|
int rate_changed = 0;
|
| 783 |
|
|
qic_model dummy_model;
|
| 784 |
|
|
unsigned int dummy_qic_std, dummy_tape_len;
|
| 785 |
|
|
TRACE_FUN(ft_t_any);
|
| 786 |
|
|
|
| 787 |
|
|
if (ft_drive_max_rate == 0) { /* first time */
|
| 788 |
|
|
supported = ftape_set_rate_test(&ft_drive_max_rate);
|
| 789 |
|
|
}
|
| 790 |
|
|
if (supported) {
|
| 791 |
|
|
ftape_command(QIC_SELECT_RATE);
|
| 792 |
|
|
result = ftape_parameter_wait(qic_rate_code(new_rate),
|
| 793 |
|
|
1 * FT_SECOND, &status);
|
| 794 |
|
|
if (result >= 0 && !(status & QIC_STATUS_ERROR)) {
|
| 795 |
|
|
rate_changed = 1;
|
| 796 |
|
|
}
|
| 797 |
|
|
}
|
| 798 |
|
|
TRACE_CATCH(result = ftape_report_configuration(&dummy_model,
|
| 799 |
|
|
&data_rate,
|
| 800 |
|
|
&dummy_qic_std,
|
| 801 |
|
|
&dummy_tape_len),);
|
| 802 |
|
|
if (data_rate != new_rate) {
|
| 803 |
|
|
if (!supported) {
|
| 804 |
|
|
TRACE(ft_t_warn, "Rate change not supported!");
|
| 805 |
|
|
} else if (rate_changed) {
|
| 806 |
|
|
TRACE(ft_t_warn, "Requested: %d, got %d",
|
| 807 |
|
|
new_rate, data_rate);
|
| 808 |
|
|
} else {
|
| 809 |
|
|
TRACE(ft_t_warn, "Rate change failed!");
|
| 810 |
|
|
}
|
| 811 |
|
|
result = -EINVAL;
|
| 812 |
|
|
}
|
| 813 |
|
|
/*
|
| 814 |
|
|
* Set data rate and write precompensation as specified:
|
| 815 |
|
|
*
|
| 816 |
|
|
* | QIC-40/80 | QIC-3010/3020
|
| 817 |
|
|
* rate | precomp | precomp
|
| 818 |
|
|
* ----------+-------------+--------------
|
| 819 |
|
|
* 250 Kbps. | 250 ns. | 0 ns.
|
| 820 |
|
|
* 500 Kbps. | 125 ns. | 0 ns.
|
| 821 |
|
|
* 1 Mbps. | 42 ns. | 0 ns.
|
| 822 |
|
|
* 2 Mbps | N/A | 0 ns.
|
| 823 |
|
|
*/
|
| 824 |
|
|
if ((qic_std == QIC_TAPE_QIC40 && data_rate > 500) ||
|
| 825 |
|
|
(qic_std == QIC_TAPE_QIC80 && data_rate > 1000)) {
|
| 826 |
|
|
TRACE_ABORT(-EINVAL,
|
| 827 |
|
|
ft_t_warn, "Datarate too high for QIC-mode");
|
| 828 |
|
|
}
|
| 829 |
|
|
TRACE_CATCH(fdc_set_data_rate(data_rate),_res = -EINVAL);
|
| 830 |
|
|
ft_data_rate = data_rate;
|
| 831 |
|
|
if (qic_std == QIC_TAPE_QIC40 || qic_std == QIC_TAPE_QIC80) {
|
| 832 |
|
|
switch (data_rate) {
|
| 833 |
|
|
case 250:
|
| 834 |
|
|
fdc_set_write_precomp(250);
|
| 835 |
|
|
break;
|
| 836 |
|
|
default:
|
| 837 |
|
|
case 500:
|
| 838 |
|
|
fdc_set_write_precomp(125);
|
| 839 |
|
|
break;
|
| 840 |
|
|
case 1000:
|
| 841 |
|
|
fdc_set_write_precomp(42);
|
| 842 |
|
|
break;
|
| 843 |
|
|
}
|
| 844 |
|
|
} else {
|
| 845 |
|
|
fdc_set_write_precomp(0);
|
| 846 |
|
|
}
|
| 847 |
|
|
TRACE_EXIT result;
|
| 848 |
|
|
}
|
| 849 |
|
|
|
| 850 |
|
|
/* The next two functions are used to cope with excessive overrun errors
|
| 851 |
|
|
*/
|
| 852 |
|
|
int ftape_increase_threshold(void)
|
| 853 |
|
|
{
|
| 854 |
|
|
TRACE_FUN(ft_t_flow);
|
| 855 |
|
|
|
| 856 |
|
|
if (fdc.type < i82077 || ft_fdc_threshold >= 12) {
|
| 857 |
|
|
TRACE_ABORT(-EIO, ft_t_err, "cannot increase fifo threshold");
|
| 858 |
|
|
}
|
| 859 |
|
|
if (fdc_fifo_threshold(++ft_fdc_threshold, NULL, NULL, NULL) < 0) {
|
| 860 |
|
|
TRACE(ft_t_err, "cannot increase fifo threshold");
|
| 861 |
|
|
ft_fdc_threshold --;
|
| 862 |
|
|
fdc_reset();
|
| 863 |
|
|
}
|
| 864 |
|
|
TRACE(ft_t_info, "New FIFO threshold: %d", ft_fdc_threshold);
|
| 865 |
|
|
TRACE_EXIT 0;
|
| 866 |
|
|
}
|
| 867 |
|
|
|
| 868 |
|
|
int ftape_half_data_rate(void)
|
| 869 |
|
|
{
|
| 870 |
|
|
if (ft_data_rate < 500) {
|
| 871 |
|
|
return -1;
|
| 872 |
|
|
}
|
| 873 |
|
|
if (ftape_set_data_rate(ft_data_rate / 2, ft_qic_std) < 0) {
|
| 874 |
|
|
return -EIO;
|
| 875 |
|
|
}
|
| 876 |
|
|
ftape_calc_timeouts(ft_qic_std, ft_data_rate, ftape_tape_len);
|
| 877 |
|
|
return 0;
|
| 878 |
|
|
}
|
| 879 |
|
|
|
| 880 |
|
|
/* Seek the head to the specified track.
|
| 881 |
|
|
*/
|
| 882 |
|
|
int ftape_seek_head_to_track(unsigned int track)
|
| 883 |
|
|
{
|
| 884 |
|
|
int status;
|
| 885 |
|
|
TRACE_FUN(ft_t_any);
|
| 886 |
|
|
|
| 887 |
|
|
ft_location.track = -1; /* remains set in case of error */
|
| 888 |
|
|
if (track >= ft_tracks_per_tape) {
|
| 889 |
|
|
TRACE_ABORT(-EINVAL, ft_t_bug, "track out of bounds");
|
| 890 |
|
|
}
|
| 891 |
|
|
TRACE(ft_t_flow, "seeking track %d", track);
|
| 892 |
|
|
TRACE_CATCH(ftape_command(QIC_SEEK_HEAD_TO_TRACK),);
|
| 893 |
|
|
TRACE_CATCH(ftape_parameter_wait(track, ftape_timeout.head_seek,
|
| 894 |
|
|
&status),);
|
| 895 |
|
|
ft_location.track = track;
|
| 896 |
|
|
ftape_might_be_off_track = 0;
|
| 897 |
|
|
TRACE_EXIT 0;
|
| 898 |
|
|
}
|
| 899 |
|
|
|
| 900 |
|
|
int ftape_wakeup_drive(wake_up_types method)
|
| 901 |
|
|
{
|
| 902 |
|
|
int status;
|
| 903 |
|
|
int motor_on = 0;
|
| 904 |
|
|
TRACE_FUN(ft_t_any);
|
| 905 |
|
|
|
| 906 |
|
|
switch (method) {
|
| 907 |
|
|
case wake_up_colorado:
|
| 908 |
|
|
TRACE_CATCH(ftape_command(QIC_PHANTOM_SELECT),);
|
| 909 |
|
|
TRACE_CATCH(ftape_parameter(0 /* ft_drive_sel ?? */),);
|
| 910 |
|
|
break;
|
| 911 |
|
|
case wake_up_mountain:
|
| 912 |
|
|
TRACE_CATCH(ftape_command(QIC_SOFT_SELECT),);
|
| 913 |
|
|
ftape_sleep(FT_MILLISECOND); /* NEEDED */
|
| 914 |
|
|
TRACE_CATCH(ftape_parameter(18),);
|
| 915 |
|
|
break;
|
| 916 |
|
|
case wake_up_insight:
|
| 917 |
|
|
ftape_sleep(100 * FT_MILLISECOND);
|
| 918 |
|
|
motor_on = 1;
|
| 919 |
|
|
fdc_motor(motor_on); /* enable is done by motor-on */
|
| 920 |
|
|
case no_wake_up:
|
| 921 |
|
|
break;
|
| 922 |
|
|
default:
|
| 923 |
|
|
TRACE_EXIT -ENODEV; /* unknown wakeup method */
|
| 924 |
|
|
break;
|
| 925 |
|
|
}
|
| 926 |
|
|
/* If wakeup succeeded we shouldn't get an error here..
|
| 927 |
|
|
*/
|
| 928 |
|
|
TRACE_CATCH(ftape_report_raw_drive_status(&status),
|
| 929 |
|
|
if (motor_on) {
|
| 930 |
|
|
fdc_motor(0);
|
| 931 |
|
|
});
|
| 932 |
|
|
TRACE_EXIT 0;
|
| 933 |
|
|
}
|
| 934 |
|
|
|
| 935 |
|
|
int ftape_put_drive_to_sleep(wake_up_types method)
|
| 936 |
|
|
{
|
| 937 |
|
|
TRACE_FUN(ft_t_any);
|
| 938 |
|
|
|
| 939 |
|
|
switch (method) {
|
| 940 |
|
|
case wake_up_colorado:
|
| 941 |
|
|
TRACE_CATCH(ftape_command(QIC_PHANTOM_DESELECT),);
|
| 942 |
|
|
break;
|
| 943 |
|
|
case wake_up_mountain:
|
| 944 |
|
|
TRACE_CATCH(ftape_command(QIC_SOFT_DESELECT),);
|
| 945 |
|
|
break;
|
| 946 |
|
|
case wake_up_insight:
|
| 947 |
|
|
fdc_motor(0); /* enable is done by motor-on */
|
| 948 |
|
|
case no_wake_up: /* no wakeup / no sleep ! */
|
| 949 |
|
|
break;
|
| 950 |
|
|
default:
|
| 951 |
|
|
TRACE_EXIT -ENODEV; /* unknown wakeup method */
|
| 952 |
|
|
}
|
| 953 |
|
|
TRACE_EXIT 0;
|
| 954 |
|
|
}
|
| 955 |
|
|
|
| 956 |
|
|
int ftape_reset_drive(void)
|
| 957 |
|
|
{
|
| 958 |
|
|
int result = 0;
|
| 959 |
|
|
int status;
|
| 960 |
|
|
unsigned int err_code;
|
| 961 |
|
|
qic117_cmd_t err_command;
|
| 962 |
|
|
int i;
|
| 963 |
|
|
TRACE_FUN(ft_t_any);
|
| 964 |
|
|
|
| 965 |
|
|
/* We want to re-establish contact with our drive. Fire a
|
| 966 |
|
|
* number of reset commands (single step pulses) and pray for
|
| 967 |
|
|
* success.
|
| 968 |
|
|
*/
|
| 969 |
|
|
for (i = 0; i < 2; ++i) {
|
| 970 |
|
|
TRACE(ft_t_flow, "Resetting fdc");
|
| 971 |
|
|
fdc_reset();
|
| 972 |
|
|
ftape_sleep(10 * FT_MILLISECOND);
|
| 973 |
|
|
TRACE(ft_t_flow, "Reset command to drive");
|
| 974 |
|
|
result = ftape_command(QIC_RESET);
|
| 975 |
|
|
if (result == 0) {
|
| 976 |
|
|
ftape_sleep(1 * FT_SECOND); /* drive not
|
| 977 |
|
|
* accessible
|
| 978 |
|
|
* during 1 second
|
| 979 |
|
|
*/
|
| 980 |
|
|
TRACE(ft_t_flow, "Re-selecting drive");
|
| 981 |
|
|
|
| 982 |
|
|
/* Strange, the QIC-117 specs don't mention
|
| 983 |
|
|
* this but the drive gets deselected after a
|
| 984 |
|
|
* soft reset ! So we need to enable it
|
| 985 |
|
|
* again.
|
| 986 |
|
|
*/
|
| 987 |
|
|
if (ftape_wakeup_drive(ft_drive_type.wake_up) < 0) {
|
| 988 |
|
|
TRACE(ft_t_err, "Wakeup failed !");
|
| 989 |
|
|
}
|
| 990 |
|
|
TRACE(ft_t_flow, "Waiting until drive gets ready");
|
| 991 |
|
|
result= ftape_ready_wait(ftape_timeout.reset, &status);
|
| 992 |
|
|
if (result == 0 && (status & QIC_STATUS_ERROR)) {
|
| 993 |
|
|
result = ftape_report_error(&err_code,
|
| 994 |
|
|
&err_command, 1);
|
| 995 |
|
|
if (result == 0 && err_code == 27) {
|
| 996 |
|
|
/* Okay, drive saw reset
|
| 997 |
|
|
* command and responded as it
|
| 998 |
|
|
* should
|
| 999 |
|
|
*/
|
| 1000 |
|
|
break;
|
| 1001 |
|
|
} else {
|
| 1002 |
|
|
result = -EIO;
|
| 1003 |
|
|
}
|
| 1004 |
|
|
} else {
|
| 1005 |
|
|
result = -EIO;
|
| 1006 |
|
|
}
|
| 1007 |
|
|
}
|
| 1008 |
|
|
FT_SIGNAL_EXIT(_DONT_BLOCK);
|
| 1009 |
|
|
}
|
| 1010 |
|
|
if (result != 0) {
|
| 1011 |
|
|
TRACE(ft_t_err, "General failure to reset tape drive");
|
| 1012 |
|
|
} else {
|
| 1013 |
|
|
/* Restore correct settings: keep original rate
|
| 1014 |
|
|
*/
|
| 1015 |
|
|
ftape_set_data_rate(ft_data_rate, ft_qic_std);
|
| 1016 |
|
|
}
|
| 1017 |
|
|
ftape_init_drive_needed = 1;
|
| 1018 |
|
|
TRACE_EXIT result;
|
| 1019 |
|
|
}
|
