static inline void seek_track(struct floppy_state *fs, int n)
{
volatile struct swim3 *sw = fs->swim3;
if (n >= 0) {
swim3_action(fs, SEEK_POSITIVE);
sw->nseek = n;
} else {
swim3_action(fs, SEEK_NEGATIVE);
sw->nseek = -n;
}
fs->expect_cyl = (fs->cur_cyl > 0)? fs->cur_cyl + n: -1;
swim3_select(fs, STEP);
out_8(&sw->control_bis, DO_SEEK);
/* enable intr when seek finished */
out_8(&sw->intr_enable, ERROR_INTR | SEEK_DONE);
set_timeout(fs, HZ/2, seek_timeout); /* enable timeout */
}
static inline void seek_track(struct floppy_state *fs, int n)
{
struct swim3 __iomem *sw = fs->swim3;
if (n >= 0) {
swim3_action(fs, SEEK_POSITIVE);
sw->nseek = n;
} else {
swim3_action(fs, SEEK_NEGATIVE);
sw->nseek = -n;
}
fs->expect_cyl = (fs->cur_cyl >= 0)? fs->cur_cyl + n: -1;
swim3_select(fs, STEP);
in_8(&sw->error);
/* enable intr when seek finished */
out_8(&sw->intr_enable, SEEK_DONE);
out_8(&sw->control_bis, DO_SEEK);
set_timeout(fs, 3*HZ, seek_timeout); /* enable timeout */
fs->settle_time = 0;
}
static int floppy_revalidate(struct gendisk *disk)
{
struct floppy_state *fs = disk->private_data;
struct swim3 __iomem *sw;
int ret, n;
if (fs->mdev->media_bay &&
check_media_bay(fs->mdev->media_bay) != MB_FD)
return -ENXIO;
sw = fs->swim3;
grab_drive(fs, revalidating, 0);
out_8(&sw->intr_enable, 0);
out_8(&sw->control_bis, DRIVE_ENABLE);
swim3_action(fs, MOTOR_ON); /* necessary? */
fs->write_prot = -1;
fs->cur_cyl = -1;
mdelay(1);
for (n = HZ; n > 0; --n) {
if (swim3_readbit(fs, SEEK_COMPLETE))
break;
if (signal_pending(current))
break;
swim3_select(fs, RELAX);
schedule_timeout_interruptible(1);
}
ret = swim3_readbit(fs, SEEK_COMPLETE) == 0
|| swim3_readbit(fs, DISK_IN) == 0;
if (ret)
swim3_action(fs, MOTOR_OFF);
else {
fs->ejected = 0;
swim3_action(fs, SETMFM);
}
swim3_select(fs, RELAX);
release_drive(fs);
return ret;
}
static int floppy_release(struct gendisk *disk, fmode_t mode)
{
struct floppy_state *fs = disk->private_data;
struct swim3 __iomem *sw = fs->swim3;
mutex_lock(&swim3_mutex);
if (fs->ref_count > 0 && --fs->ref_count == 0) {
swim3_action(fs, MOTOR_OFF);
out_8(&sw->control_bic, 0xff);
swim3_select(fs, RELAX);
}
mutex_unlock(&swim3_mutex);
return 0;
}
static int fd_eject(struct floppy_state *fs)
{
int err, n;
err = grab_drive(fs, ejecting, 1);
if (err)
return err;
swim3_action(fs, EJECT);
for (n = 20; n > 0; --n) {
if (signal_pending(current)) {
err = -EINTR;
break;
}
swim3_select(fs, RELAX);
schedule_timeout_interruptible(1);
if (swim3_readbit(fs, DISK_IN) == 0)
break;
}
swim3_select(fs, RELAX);
udelay(150);
fs->ejected = 1;
release_drive(fs);
return err;
}
static int floppy_open(struct block_device *bdev, fmode_t mode)
{
struct floppy_state *fs = bdev->bd_disk->private_data;
struct swim3 __iomem *sw = fs->swim3;
int n, err = 0;
if (fs->ref_count == 0) {
if (fs->mdev->media_bay &&
check_media_bay(fs->mdev->media_bay) != MB_FD)
return -ENXIO;
out_8(&sw->setup, S_IBM_DRIVE | S_FCLK_DIV2);
out_8(&sw->control_bic, 0xff);
out_8(&sw->mode, 0x95);
udelay(10);
out_8(&sw->intr_enable, 0);
out_8(&sw->control_bis, DRIVE_ENABLE | INTR_ENABLE);
swim3_action(fs, MOTOR_ON);
fs->write_prot = -1;
fs->cur_cyl = -1;
for (n = 0; n < 2 * HZ; ++n) {
if (n >= HZ/30 && swim3_readbit(fs, SEEK_COMPLETE))
break;
if (signal_pending(current)) {
err = -EINTR;
break;
}
swim3_select(fs, RELAX);
schedule_timeout_interruptible(1);
}
if (err == 0 && (swim3_readbit(fs, SEEK_COMPLETE) == 0
|| swim3_readbit(fs, DISK_IN) == 0))
err = -ENXIO;
swim3_action(fs, SETMFM);
swim3_select(fs, RELAX);
} else if (fs->ref_count == -1 || mode & FMODE_EXCL)
return -EBUSY;
if (err == 0 && (mode & FMODE_NDELAY) == 0
&& (mode & (FMODE_READ|FMODE_WRITE))) {
check_disk_change(bdev);
if (fs->ejected)
err = -ENXIO;
}
if (err == 0 && (mode & FMODE_WRITE)) {
if (fs->write_prot < 0)
fs->write_prot = swim3_readbit(fs, WRITE_PROT);
if (fs->write_prot)
err = -EROFS;
}
if (err) {
if (fs->ref_count == 0) {
swim3_action(fs, MOTOR_OFF);
out_8(&sw->control_bic, DRIVE_ENABLE | INTR_ENABLE);
swim3_select(fs, RELAX);
}
return err;
}
if (mode & FMODE_EXCL)
fs->ref_count = -1;
else
++fs->ref_count;
return 0;
}