staging: comedi: adv_pci_dio: separate out PCI-1760 support
The PCI-1760 is board unique. It uses an outgoing/incoming mailbox programming sequence to access the hardware. The other boards supported by this driver use simple register mapping. Including support for the PCI-1760 in this driver just makes it harder to understand. Separate out the PCI-1760 support into a new driver, adv_pci1760. Clean up the new driver. The original code had a bunch of CamelCase and other checkpatch.pl issues. The code used to access the outgoing/incoming mailboxes was also a bit awkward with the passing of the arrays for the outgoing and incoming mailbox bytes. Replace them with two new functions that send a command and return the feedback data from the command based on the programming flow chart in the datasheet for the PCI-1760. The new adv_pci1760 driver also fixes the incomplete timer subdevice. This subdevice is actually the 2 PWM outputs so the subdevice type has been changed to COMEDI_SUBD_PWM. The counter subdevice support was not complete in the original code. They are also a bit strange since they are up counters connected to each of the digital inputs. For now that subdevice has been disabled (COMEDI_SUBD_UNUSED). Signed-off-by:H Hartley Sweeten <hsweeten@visionengravers.com> Reviewed-by: