/*
* Upload the bootblock(?) into the SoundScape. The only
* purpose of this block of code seems to be to tell
* us which version of the microcode we should be using.
*
* NOTE: The boot-block data resides in USER-SPACE!!!
* However, we have already verified its memory
* addresses by the time we get here.
*/
static int sscape_upload_bootblock(struct soundscape *sscape, struct sscape_bootblock __user *bb)
{
unsigned long flags;
int data = 0;
int ret;
ret = upload_dma_data(sscape, bb->code, sizeof(bb->code));
spin_lock_irqsave(&sscape->lock, flags);
if (ret == 0) {
data = host_read_ctrl_unsafe(sscape->io_base, 100);
}
set_midi_mode_unsafe(sscape->io_base);
spin_unlock_irqrestore(&sscape->lock, flags);
if (ret == 0) {
if (data < 0) {
snd_printk(KERN_ERR "sscape: timeout reading firmware version\n");
ret = -EAGAIN;
}
else if (__copy_to_user(&bb->version, &data, sizeof(bb->version))) {
ret = -EFAULT;
}
}
return ret;
}
/*
* Upload the microcode into the SoundScape. The
* microcode is 64K of data, and if we try to copy
* it into a local variable then we will SMASH THE
* KERNEL'S STACK! We therefore leave it in USER
* SPACE, and save ourselves from copying it at all.
*/
static int sscape_upload_microcode(struct soundscape *sscape,
const struct sscape_microcode __user *mc)
{
unsigned long flags;
char __user *code;
int err;
/*
* We are going to have to copy this data into a special
* DMA-able buffer before we can upload it. We shall therefore
* just check that the data pointer is valid for now.
*
* NOTE: This buffer is 64K long! That's WAY too big to
* copy into a stack-temporary anyway.
*/
if ( get_user(code, &mc->code) ||
!access_ok(VERIFY_READ, code, SSCAPE_MICROCODE_SIZE) )
return -EFAULT;
if ((err = upload_dma_data(sscape, code, SSCAPE_MICROCODE_SIZE)) == 0) {
snd_printk(KERN_INFO "sscape: MIDI firmware loaded\n");
}
spin_lock_irqsave(&sscape->lock, flags);
set_midi_mode_unsafe(sscape->io_base);
spin_unlock_irqrestore(&sscape->lock, flags);
initialise_mpu401(sscape->mpu);
return err;
}
static int sscape_midi_get(struct snd_kcontrol *kctl,
struct snd_ctl_elem_value *uctl)
{
struct snd_cs4231 *chip = snd_kcontrol_chip(kctl);
struct snd_card *card = chip->card;
register struct soundscape *s = get_card_soundscape(card);
unsigned long flags;
spin_lock_irqsave(&s->lock, flags);
set_host_mode_unsafe(s->io_base);
if (host_write_ctrl_unsafe(s->io_base, CMD_GET_MIDI_VOL, 100)) {
uctl->value.integer.value[0] = host_read_ctrl_unsafe(s->io_base, 100);
}
set_midi_mode_unsafe(s->io_base);
spin_unlock_irqrestore(&s->lock, flags);
return 0;
}
static int sscape_midi_put(struct snd_kcontrol *kctl,
struct snd_ctl_elem_value *uctl)
{
struct snd_wss *chip = snd_kcontrol_chip(kctl);
struct snd_card *card = chip->card;
register struct soundscape *s = get_card_soundscape(card);
unsigned long flags;
int change;
spin_lock_irqsave(&s->lock, flags);
/*
* We need to put the board into HOST mode before we
* can send any volume-changing HOST commands ...
*/
set_host_mode_unsafe(s->io_base);
/*
* To successfully change the MIDI volume setting, you seem to
* have to write a volume command, write the new volume value,
* and then perform another volume-related command. Perhaps the
* first command is an "open" and the second command is a "close"?
*/
if (s->midi_vol == ((unsigned char) uctl->value.integer. value[0] & 127)) {
change = 0;
goto __skip_change;
}
change = (host_write_ctrl_unsafe(s->io_base, CMD_SET_MIDI_VOL, 100)
&& host_write_ctrl_unsafe(s->io_base, ((unsigned char) uctl->value.integer. value[0]) & 127, 100)
&& host_write_ctrl_unsafe(s->io_base, CMD_XXX_MIDI_VOL, 100));
s->midi_vol = (unsigned char) uctl->value.integer.value[0] & 127;
__skip_change:
/*
* Take the board out of HOST mode and back into MIDI mode ...
*/
set_midi_mode_unsafe(s->io_base);
spin_unlock_irqrestore(&s->lock, flags);
return change;
}
