Commit Graph

26 Commits

Author SHA1 Message Date
Pedro F. Giffuni
718cf2ccb9 sys/dev: further adoption of SPDX licensing ID tags.
Mainly focus on files that use BSD 2-Clause license, however the tool I
was using misidentified many licenses so this was mostly a manual - error
prone - task.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.
2017-11-27 14:52:40 +00:00
Jean-Sébastien Pédron
238b89fcad iicbus: Use device_delete_children() instead of explicit child removal
If the bus is detached and deleted by a call to device_delete_child() or
device_delete_children() on a device higher in the tree, I²C children
were already detached and deleted. So the device_t pointer stored in sc
points to freed memory: we must not try to delete it again.

By using device_delete_children(), we let subr_bus.c figure out if there
are children to take care of.

While here, make sure iicbus_detach() and iicoc_detach() call
device_delete_children() too, to be safe.

Reviewed by:	jhb, imp
Approved by:	jhb, imp
MFC after:	1 week
Differential Revision:	https://reviews.freebsd.org/D3926
2015-10-20 19:52:59 +00:00
Luiz Otavio O Souza
bf17755477 Allow the use of OFW I2C bus together with iicbb(4) on OFW-based systems.
This change makes ofw_iicbus attach to iicbb(4) controllers in addition to
the already supported i2c host bridges (iichb).

On iicbb(4) allow the direct access of the OFW parent node by its children,
so they can be directly attached to iicbb(4) node on the DTS without the
need of describing the i2c bus.

Approved by:	adrian (mentor, implicit)
2014-02-13 18:22:49 +00:00
Alexander Kabaev
d4280a0fab Provide pre/post transfer method callbacks for icbbb
clients.

These are helful when making certain drivers work on both Linux
and FreeBSD without changing the code flow too much.

Reviewed by: kib, wlosh
MFC after: 1 month
2012-03-01 20:58:20 +00:00
Adrian Chadd
fd06fec782 IIC bitbang changes - prepare to make the bit delay configurable; debug print changes.
* Right now the delay is hard coded at 10uS. This is a bit long when doing lots
  of periodic i2c transactions. So create a 'udelay' parameter and initialise it
  to 10. This can be tuned later.

* Add a newline after a transaction finishes, so the debugging output isn't so
  horrible.
2011-12-20 02:49:01 +00:00
Warner Losh
b23193a559 Fix iicbus_intr, iicbus_write and device_read_ivar prototypes... 2009-02-10 22:50:23 +00:00
John Baldwin
13e3657b7b Add locking to the various iicbus(4) bridge drivers:
- Just grab Giant in the ixp425_iic(4) driver since this driver uses
  a shared address/data register window pair to access the actual
  I2C registers.  None of the other ixp425 drivers lock access to these
  shared address/data registers yet and that would need to be done before
  this could use any meaningful locking.
- Add locking to the interrupt handler and 'iicbus_reset' methods of the
  at91_twi(4) driver.
- Add locking to the pcf(4) driver.  Other pcf(4) fixes include:
  - Don't needlessly zero the softc.
  - Use bus_foo rather than bus_space_foo and remove bus space tag and
    handle from softc.
- The lpbb(4) driver just grabs Giant for now.  This will be refined later
  when ppbus(4) is locked.
- As was done with smbus earlier, move the DRIVER_MODULE() lines to match
  the bus driver (either iicbus or iicbb) to the bridge driver into the
  bridge drivers.

Tested by:	sam (arm/ixp425)
2008-08-04 20:46:15 +00:00
Warner Losh
99a1402117 MFp4: Make iicbus_trasnfer_gen suitable for bridge drivers. Use it in the
bitbang bridge.
2007-03-23 23:03:54 +00:00
Warner Losh
6c818b5fa3 More properly cleanup the iicbus child when deleting it.
These are from patches by John Wehle, but the commentary has been
updated by me.

Obtained from: ports/multimedia/pvr250, indirectly
2006-12-05 06:11:10 +00:00
Warner Losh
7362a1ad37 Reference Hauppage's cxm_iic bit-bang device here.
Add a note that suggests a cleanup.

Note: This patch was derived based on looking at the pvrxxx/pvr250
ports' Makefiles only, and may be incomplete.  It is not derived from
anything I saw from Hauppage.
2006-12-05 05:06:59 +00:00
Warner Losh
0fdb9239c4 MFp4: Add ixpiic bit-bang driver.
Submitted by: sam@
2006-11-22 06:41:37 +00:00
Warner Losh
2c3538b83a Minor style(9) treatment to make things a little more consistant
within iicbus code.
2006-08-21 17:32:50 +00:00
Warner Losh
dbafaeca13 newbus will zero softc, so no need to duplicate the zeroing here.
Plus a minor formatting nit in nearby code.
2006-04-04 23:29:17 +00:00
David E. O'Brien
aad970f1fe Use __FBSDID().
Also some minor style cleanups.
2003-08-24 17:55:58 +00:00
John-Mark Gurney
9c77e81b5d make iicbb_devclass and iicbb_driver globally visible. This will let
drivers that implemnt the i2c bit banging bus interface not have to
recompile iicbb in order to add an attachment for it.

This will mean the bktr and other definitions can go back to their
respective drivers.
2003-06-19 02:50:08 +00:00
Nicolas Souchu
c17d43407f Major rework of the iicbus/smbus framework:
- VIA chipset SMBus controllers added
	- alpm driver updated
	- Support for dynamic modules added
	- bktr FreeBSD smbus updated but not tested
	- cleanup
2002-03-23 15:49:15 +00:00
Poul-Henning Kamp
db7e3af111 Remove unneeded #include <machine/clock.h> 2000-10-15 14:19:01 +00:00
Jake Burkholder
f1c7314284 Allow these drivers to be detached.
Reviewed by:	mdodd
2000-06-16 07:20:29 +00:00
Poul-Henning Kamp
3389ae9350 Remove ~25 unneeded #include <sys/conf.h>
Remove ~60 unneeded #include <sys/malloc.h>
2000-04-19 14:58:28 +00:00
Poul-Henning Kamp
ed6aff7387 Remove unneeded <sys/buf.h> includes.
Due to some interesting cpp tricks in lockmgr, the LINT kernel shrinks
by 924 bytes.
2000-04-18 15:15:39 +00:00
Peter Wemm
c3aac50f28 $Id$ -> $FreeBSD$ 1999-08-28 01:08:13 +00:00
Matthew N. Dodd
15317dd875 Alter the behavior of sys/kern/subr_bus.c:device_print_child()
- device_print_child() either lets the BUS_PRINT_CHILD
	  method produce the entire device announcement message or
	  it prints "foo0: not found\n"

Alter sys/kern/subr_bus.c:bus_generic_print_child() to take on
the previous behavior of device_print_child() (printing the
"foo0: <FooDevice 1.1>" bit of the announce message.)

Provide bus_print_child_header() and bus_print_child_footer()
to actually print the output for bus_generic_print_child().
These functions should be used whenever possible (unless you can
just use bus_generic_print_child())

The BUS_PRINT_CHILD method now returns int instead of void.

Modify everything else that defines or uses a BUS_PRINT_CHILD
method to comply with the above changes.

	- Devices are 'on' a bus, not 'at' it.
	- If a custom BUS_PRINT_CHILD method does the same thing
	  as bus_generic_print_child(), use bus_generic_print_child()
	- Use device_get_nameunit() instead of both
	  device_get_name() and device_get_unit()
	- All BUS_PRINT_CHILD methods return the number of
	  characters output.

Reviewed by: dfr, peter
1999-07-29 01:03:04 +00:00
Doug Rabson
566643e39e Move the declaration of the interrupt type from the driver structure
to the BUS_SETUP_INTR call.
1999-05-08 21:59:43 +00:00
Roger Hardiman
6d076bb425 Submitted by: Nicolas Souchu <nsouch@freebsd.org>
Added support required by bt848 driver for MSP34xx audio chip
1999-01-28 15:50:24 +00:00
Nicolas Souchu
804ec04759 Properly reset parent to get interface addr. 1998-11-04 22:07:24 +00:00
Nicolas Souchu
04f89a63cb iicbb is generic support for I2C bit-banging.
Other files: timeout management added to the I2C framework.
1998-10-31 11:31:07 +00:00