int set_pio_mode(ide_drive_t *drive, int arg)
{
struct request rq;
if (arg < 0 || arg > 255)
return -EINVAL;
if (!HWIF(drive)->tuneproc)
return -ENOSYS;
if (drive->special.b.set_tune)
return -EBUSY;
ide_init_drive_cmd(&rq);
drive->tune_req = (u8) arg;
drive->special.b.set_tune = 1;
(void) ide_do_drive_cmd(drive, &rq, ide_wait);
return 0;
}
int ide_cmd_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
{
u8 *buf = NULL;
int bufsize = 0, err = 0;
u8 args[4], xfer_rate = 0;
ide_task_t tfargs;
struct ide_taskfile *tf = &tfargs.tf;
struct hd_driveid *id = drive->id;
if (NULL == (void *) arg) {
struct request rq;
ide_init_drive_cmd(&rq);
rq.cmd_type = REQ_TYPE_ATA_TASKFILE;
return ide_do_drive_cmd(drive, &rq, ide_wait);
}
if (copy_from_user(args, (void __user *)arg, 4))
return -EFAULT;
memset(&tfargs, 0, sizeof(ide_task_t));
tf->feature = args[2];
if (args[0] == WIN_SMART) {
tf->nsect = args[3];
tf->lbal = args[1];
tf->lbam = 0x4f;
tf->lbah = 0xc2;
tfargs.tf_flags = IDE_TFLAG_OUT_TF | IDE_TFLAG_IN_NSECT;
} else {
tf->nsect = args[1];
tfargs.tf_flags = IDE_TFLAG_OUT_FEATURE |
IDE_TFLAG_OUT_NSECT | IDE_TFLAG_IN_NSECT;
}
tf->command = args[0];
tfargs.data_phase = args[3] ? TASKFILE_IN : TASKFILE_NO_DATA;
if (args[3]) {
tfargs.tf_flags |= IDE_TFLAG_IO_16BIT;
bufsize = SECTOR_WORDS * 4 * args[3];
buf = kzalloc(bufsize, GFP_KERNEL);
if (buf == NULL)
return -ENOMEM;
}
if (tf->command == WIN_SETFEATURES &&
tf->feature == SETFEATURES_XFER &&
tf->nsect >= XFER_SW_DMA_0 &&
(id->dma_ultra || id->dma_mword || id->dma_1word)) {
xfer_rate = args[1];
if (tf->nsect > XFER_UDMA_2 && !eighty_ninty_three(drive)) {
printk(KERN_WARNING "%s: UDMA speeds >UDMA33 cannot "
"be set\n", drive->name);
goto abort;
}
}
err = ide_raw_taskfile(drive, &tfargs, buf, args[3]);
args[0] = tf->status;
args[1] = tf->error;
args[2] = tf->nsect;
if (!err && xfer_rate) {
/* active-retuning-calls future */
ide_set_xfer_rate(drive, xfer_rate);
ide_driveid_update(drive);
}
abort:
if (copy_to_user((void __user *)arg, &args, 4))
err = -EFAULT;
if (buf) {
if (copy_to_user((void __user *)(arg + 4), buf, bufsize))
err = -EFAULT;
kfree(buf);
}
return err;
}