static void
lpbb_setscl(device_t dev, int val)
{
device_t ppbus = device_get_parent(dev);
ppb_lock(ppbus);
if (val == 0)
ppb_wctr(ppbus, (u_char)(ppb_rctr(ppbus) & ~SCL_out));
else
ppb_wctr(ppbus, (u_char)(ppb_rctr(ppbus) | SCL_out));
ppb_unlock(ppbus);
}
/* Reset bus by setting SDA first and then SCL. */
static void
lpbb_reset_bus(device_t dev)
{
device_t ppbus = device_get_parent(dev);
ppb_assert_locked(ppbus);
ppb_wdtr(ppbus, (u_char)~SDA_out);
ppb_wctr(ppbus, (u_char)(ppb_rctr(ppbus) | SCL_out));
}
/*
* byte_peripheral_write()
*
* Write n bytes in BYTE mode
*/
int
byte_peripheral_write(device_t bus, char *buffer, int len, int *sent)
{
int error = 0, i;
char r;
ppb_1284_set_state(bus, PPB_PERIPHERAL_TRANSFER);
/* wait forever, the remote host is master and should initiate
* termination
*/
for (i=0; i<len; i++) {
/* force remote nFAULT low to release the remote waiting
* process, if any
*/
r = ppb_rctr(bus);
ppb_wctr(bus, r & ~nINIT);
#ifdef DEBUG_1284
printf("y");
#endif
/* Event 7 */
error = ppb_poll_bus(bus, PPB_FOREVER, nBUSY, nBUSY,
PPB_INTR);
if (error && error != EWOULDBLOCK)
goto error;
#ifdef DEBUG_1284
printf("b");
#endif
if ((error = byte_peripheral_outbyte(bus, buffer+i, (i == len-1))))
goto error;
}
error:
if (!error)
ppb_1284_set_state(bus, PPB_PERIPHERAL_IDLE);
*sent = i;
return (error);
}
