Commit Graph

6 Commits

Author SHA1 Message Date
Nick Hibma
6979450036 Update the comments on values than can be returned by DEVICE_PROBE.
DEVICE_PROBE can return priorities.

Reviewed by:	Doug Rabson <dfr@nlsystems.com>
1999-06-17 19:22:12 +00:00
Doug Rabson
6c2e3dde8c * Define a new static method DEVICE_IDENTIFY which is called to add device
instances to a parent bus.
* Define a new method BUS_ADD_CHILD which can be called from DEVICE_IDENTIFY
  to add new instances.
* Add a generic implementation of DEVICE_PROBE which calls DEVICE_IDENTIFY
  for each driver attached to the parent's devclass.
* Move the hint-based isa probe from the isa driver to a new isahint driver
  which can be shared between i386 and alpha.
1999-05-14 11:22:47 +00:00
Doug Rabson
8b2970bbe6 * Augment the interface language to allow arbitrary C code to be 'passed
through' to the C compiler.
* Allow the interface to specify a default implementation for methods.
* Allow 'static' methods which are not device specific.
* Add a simple scheme for probe routines to return a priority value. To
  make life simple, priority values are negative numbers (positive numbers
  are standard errno codes) with zero being the highest priority. The
  driver which returns the highest priority will be chosen for the device.
1999-05-10 17:06:14 +00:00
Garrett Wollman
14177d72cd My changes to the new device interface:
- Interface wth the new resource manager.
	- Allow for multiple drivers implementing a single devclass.
	- Remove ordering dependencies between header files.
	- Style cleanup.
	- Add DEVICE_SUSPEND and DEVICE_RESUME methods.
	- Move to a single-phase interrupt setup scheme.

Kernel builds on the Alpha are brken until Doug gets a chance to incorporate
these changes on that side.

Agreed to in principle by: dfr
1998-11-14 21:58:51 +00:00
Nicolas Souchu
7a8ecb9e64 Add semicolon to INTERFACE declarations 1998-11-08 18:35:53 +00:00
Doug Rabson
b1bf661000 [Add missing files from previous commit]
Major changes to the generic device framework for FreeBSD/alpha:

* Eliminate bus_t and make it possible for all devices to have
  attached children.

* Support dynamically extendable interfaces for drivers to replace
  both the function pointers in driver_t and bus_ops_t (which has been
  removed entirely.  Two system defined interfaces have been defined,
  'device' which is mandatory for all devices and 'bus' which is
  recommended for all devices which support attached children.

* In addition, the alpha port defines two simple interfaces 'clock'
  for attaching various real time clocks to the system and 'mcclock'
  for the many different variations of mc146818 clocks which can be
  attached to different alpha platforms.  This eliminates two more
  function pointer tables in favour of the generic method dispatch
  system provided by the device framework.

Future device interfaces may include:

* cdev and bdev interfaces for devfs to use in replacement for specfs
  and the fixed interfaces bdevsw and cdevsw.

* scsi interface to replace struct scsi_adapter (not sure how this
  works in CAM but I imagine there is something similar there).

* various tailored interfaces for different bus types such as pci,
  isa, pccard etc.
1998-06-14 13:53:12 +00:00