Commit Graph

177 Commits

Author SHA1 Message Date
Ian Lepore
844aff82a6 Allow i2c bus speed to be configured via hints, FDT data, and sysctl.
The current support for controlling i2c bus speed is an inconsistant mess.
There are 4 symbolic speed values defined, UNKNOWN, SLOW, FAST, FASTEST.
It seems to be universally assumed that SLOW means the standard 100KHz
rate from the original spec.  Nothing ever calls iicbus_reset() with a
speed of FAST, although some drivers would treat it as the 400KHz standard
speed.  Mostly iicbus_reset() is called with the speed set to UNKNOWN or
FASTEST, and there's really no telling what any individual driver will do
with those.

The speed of an i2c bus is limited by the speed of the slowest device on
the bus.  This means that generally the bus speed needs to be configured
based on the board/system and the components within it.  Historically for
i2c we've configured with device hints.  Newer systems use FDT data and it
documents a clock-frequency property for i2c busses.  Hobbyists and
developers are likely to want on the fly changes.  These changes provide
all 3 methods, but do not require any existing drivers to change to use
the new facilities.

This adds an iicbus method, iicbus_get_frequency(dev, speed) that gets the
frequency for the requested symbolic speed.  If the symbolic speed is SLOW
or if there is no speed configured for the bus, the returned value is
100KHz, always.  Otherwise, if bus speed is configured by hints, fdt,
tunable, or sysctl, that speed is returned.  It also adds a helper
function, iicbus_init_frequency() that any bus driver subclassed from
iicbus can initialize the frequency from some other source of info.

Initial driver implementations are provided for Freescale and TI.

Differential Revision:        https://reviews.freebsd.org/D1174
PR:		195009
2014-11-18 01:54:31 +00:00
Konstantin Belousov
9247911a58 Add a method to iicbus to request IIC_M_NOSTOP behaviour for multibyte
transfers to be default.  It simplifies porting code which assumes
such settings.

Discussed with:	avg, llos, nwhitehorn
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
2014-10-27 07:51:26 +00:00
Justin Hibbits
e9152038d3 Move the adm1030 driver to the proper location, and rename it.
For compatibility, 'device windtunnel' is still supported, but one should use
'device adm1030' instead, and this has been updated in GENERIC and NOTES.
2014-10-16 01:32:22 +00:00
Justin Hibbits
6ab4d70393 Check error return from reading integer part of temperature.
There's a very remote, but possible, chance that the integer part read will
fail, but the fraction read succeeds, at which point the reported temperature is
invalid.

Reported by: Matthew Rezny
MFC after:	3 weeks
2014-10-12 23:48:55 +00:00
Gleb Smirnoff
c8dfaf382f Mechanically convert to if_inc_counter(). 2014-09-19 03:51:26 +00:00
Rui Paulo
efce3748f3 Revert r268543.
We should probably fix sys/gpio.h instead.
2014-07-12 06:23:42 +00:00
Rui Paulo
bd08cbb81a Move iic.h to sys/ so that it's automatically installed in /usr/include/sys.
This lets us call iic(4) ioctls without needing the kernel source code
and follows the same model of GPIO.

MFC after:	3 weeks
2014-07-12 01:04:10 +00:00
Luiz Otavio O Souza
34aa2211e7 Ignore IIC_ENOADDR from iicbus_reset() as it only means we have a
master-only controller.

This fixes the iic bus scan with i2c(8) (on supported controllers).

Tested with gpioiic(4).
2014-05-31 14:38:05 +00:00
Luiz Otavio O Souza
dd75f2c5eb Add the lm75 i2c digital temperature sensor driver.
This driver supports the low and high precision models (9 and 11 bits) and
it will auto-detect the both variants.

The driver expose the temperature registers (actual temperature, shutdown
and hysteresys temperature) and also the configuration register.

It was tested on FDT systems: RPi, BBB and on non-FDT systems: AR71xx, with
both, hardware i2c controllers (when available) and gpioiic(4).

This provides a simple and cheap way for verifying the i2c bus on embedded
systems.
2014-05-10 12:19:02 +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
Justin Hibbits
c017acc769 Add driver for the ADT7460/ADT7467 fan controller found in later PowerBooks
and iBooks.  Original work by andreast.

MFC after:	1 month
2014-02-03 01:22:50 +00:00
Justin Hibbits
e17bec9172 Make more unsigned ints signed.
Found by:	clang (powerpc64)
MFC after:	1 week
2013-12-07 22:25:07 +00:00
Justin Hibbits
8991c54091 Fix some integer signs. These unsigned integers should all be signed.
Found by:	clang (powerpc64)
2013-12-07 19:55:34 +00:00
Gleb Smirnoff
76039bc84f The r48589 promised to remove implicit inclusion of if_var.h soon. Prepare
to this event, adding if_var.h to files that do need it. Also, include
all includes that now are included due to implicit pollution via if_var.h

Sponsored by:	Netflix
Sponsored by:	Nginx, Inc.
2013-10-26 17:58:36 +00:00
Gleb Smirnoff
540b1a7238 Clean up SIOCSIFDSTADDR usage from ifnet drivers. The ioctl itself is
extremely outdated, and I doubt that it was ever used for ifnet drivers.
It was used for AF_INET sockets in pre-FreeBSD time.

Approved by:	re (hrs)
Sponsored by:	Nginx, Inc.
2013-09-11 09:19:44 +00:00
Gleb Smirnoff
47e8d432d5 Add const qualifier to the dst parameter of the ifnet if_output method. 2013-04-26 12:50:32 +00:00
Sofian Brabez
61bfd86762 Use DEVMETHOD_END macro defined in sys/bus.h instead of {0, 0} sentinel on device_method_t arrays
Reviewed by:	cognet
Approved by:	cognet
2013-01-30 18:01:20 +00:00
Kevin Lo
72794e9e2c Check the return value of uiomove(9). 2012-11-13 05:58:52 +00:00
Marius Strobl
f9e26776a6 It turns out that as documented, PCF8563_R_SECOND_VL (i.e. battery low)
doesn't automatically clear when VDD rises above Vlow again and needs to be
cleared manually. However, apparently this needs all of the time registers
to be set, i.e. pcf8563_settime(), and not just PCF8563_R_SECOND in order
for PCF8563_R_SECOND_VL to stick. Thus, we just issue a warning during
pcf8563_attach() rather than failing with ENXIO in case it is set.

MFC after:	3 days
2012-10-18 10:29:16 +00:00
Kevin Lo
374c6ff93a Remove unused variables. 2012-09-29 16:15:27 +00:00
Hiroki Sato
f8e8af9cf2 Add s35390a_rtc(4) driver for Seiko Instruments S-35390A RTC.
Submitted by:	Yusuke Tanaka
2012-08-21 17:31:10 +00:00
Andreas Tobler
a894f6a0d4 Add a new temperature driver for certain PowerMacs. Found here on my Quad G5. 2012-08-19 19:37:14 +00:00
Andreas Tobler
58af3406d2 Unify the sysctl description with the other PowerMac temperature drivers. 2012-08-19 19:34:10 +00:00
Andreas Tobler
3b29957407 Avoid using the degree symbol. Looks ugly on the console. 2012-08-19 19:32:38 +00:00
Andreas Tobler
11e31cd29a Do the ADC init only at startup and not during every sensor read call.
This reduces the number of interrupts.
2012-08-19 19:31:36 +00:00
Marcel Moolenaar
d08dfc3305 Don't include MIPS machine headers. There's no need for it. 2012-05-19 17:42:11 +00:00
Marius Strobl
34f4e555b5 Add a driver for the NXP (Philips) PCF8563 RTC.
Obtained from:	NetBSD (pcf8563reg.h)
2012-04-13 23:07:32 +00:00
Jayachandran C.
1ab68cbb08 Driver for OpenCores I2C controller.
Add a Simple polled driver iicoc for the OpenCores I2C controller. This
is used in Netlogic XLP processors.

Submitted by:	Sreekanth M. S. (kanthms at netlogicmicro com)
2012-03-27 10:44:32 +00:00
Jayachandran C.
1513a6ff90 Move driver for DS1374 RTC to sys/dev/iicbus
The earlier version of the driver is sys/mips/rmi/dev/iic/ds1374u.c
Convert all references to ds1374u to ds1374, and use DEVMETHOD_END.
Also update the license header as Netlogic is now Broadcom.
2012-03-27 09:48:18 +00:00
Andreas Tobler
10520ef88f Fix typo. 2012-03-02 18:18:14 +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
Adrian Chadd
9844b3b3ab Allow the i2c node requirements to be slightly relaxed.
These realtek switch PHYs speak a variant of i2c with some slightly
modified handling.

From the submitter, slightly modified now that some further digging
has been done:

  The I2C framework makes a assumption that the read/not-write bit of the first
  byte (the address) indicates whether reads or writes are to follow.

  The RTL8366 family uses the bus: after sending the address+read/not-write byte,
  two register address bytes are sent, then the 16-bit register value is sent
  or received.  While the register write access can be performed as a 4-byte
  write, the read access requires the read bit to be set, but the first two bytes
  for the register address then need to be transmitted.

This patch maintains the i2c protocol behaviour but allows it to be relaxed
(for these kinds of switch PHYs, and whatever else Realtek may do with this
almost-but-not-quite i2c bus) - by setting the "strict" hint to 0.
The "strict" hint defaults to 1.

Submitted by:	Stefan Bethke <stb@lassitu.de>
2011-12-04 11:55:33 +00:00
Marius Strobl
4b7ec27007 - There's no need to overwrite the default device method with the default
one. Interestingly, these are actually the default for quite some time
  (bus_generic_driver_added(9) since r52045 and bus_generic_print_child(9)
  since r52045) but even recently added device drivers do this unnecessarily.
  Discussed with: jhb, marcel
- While at it, use DEVMETHOD_END.
  Discussed with: jhb
- Also while at it, use __FBSDID.
2011-11-22 21:28:20 +00:00
Ed Schouten
d745c852be Mark MALLOC_DEFINEs static that have no corresponding MALLOC_DECLAREs.
This means that their use is restricted to a single C file.
2011-11-07 06:44:47 +00:00
Christian Brueffer
04c4548981 Revert r226398 and instead move the allocation of usrbufs after the error check.
Suggested by:	pjd
MFC after:	1 week
2011-10-16 17:38:20 +00:00
Christian Brueffer
0ad684e7b4 Properly free resources in an error case.
CID:		4203
Found with:	Coverity Prevent(tm)
MFC after:	1 week
2011-10-15 15:57:55 +00:00
Bjoern A. Zeeb
a34c6aeb85 Tag mbufs of all incoming frames or packets with the interface's FIB
setting (either default or if supported as set by SIOCSIFFIB, e.g.
from ifconfig).

Submitted by:	Alexander V. Chernikov (melifaro ipfw.ru)
Reviewed by:	julian
MFC after:	2 weeks
2011-07-03 16:08:38 +00:00
Kevin Lo
ee6eac62f7 Remove duplicate header includes 2011-06-28 08:36:48 +00:00
Andreas Tobler
d91c258074 - Improve error handling.
- Add retry loops in the i2c read/write functions.
- Combied the ADC channel selection and readout of the value into
  one iicbus_transfer to avoid possible races.

Reviewed by: nwhitehorn
2011-06-08 16:00:30 +00:00
Andreas Tobler
1b49664037 - Improve error handling.
- Add a retry loop for the i2c sensor reading.
- Check on busy status of the chip and on invalid values.
- Fix a typo in a comment.
- Replace the constant 2732 with the ZERO_C_TO_K macro.

Approved by:	nwhitehorn (mentor)
2011-06-04 09:23:54 +00:00
Andreas Tobler
7cced077f8 Replace the FCU_ZERO_C_TO_K with the ZERO_C_TO_K from powermac_thermal.h.
Approved by:	nwhitehorn (mentor)
2011-06-04 09:19:53 +00:00
Andreas Tobler
aa7e99afbd - Improve error handling.
- Add a retry loop for the i2c sensor reading.
- Update the sensor handling for sensors which do not have a location
entry. [1]

Submitted by: [1] Justin Hibbits.
Approved by:	nwhitehorn (mentor)
2011-06-03 18:58:32 +00:00
Nathan Whitehorn
6b9a12b391 Move the celsius-to-kelvin conversion to a place that powermac_thermal can
see it as well.
2011-05-29 19:53:46 +00:00
Nathan Whitehorn
815d7d92c1 Update the I2C-based temperature/fan drivers to connect to the Powermac
thermal control module. This provides automatic fan management on all G5
PowerMacs and Xserves.
2011-05-29 18:35:57 +00:00
Andreas Tobler
d188174a4f Add a new driver, the ad7417, to read temperatures and voltages on some
PowerMac's.

Approved by:	nwhitehorn (mentor)
2011-05-29 14:25:42 +00:00
Andreas Tobler
14be64618e There are PowerMacs which do not have a hwsensor-location property
for this sensor. Instead of leaving this location empty we use here
the default name 'sensor'.

Submitted by: Justin Hibbits <chmeeedalf at gmail dot com>
Approved by: nwhitehorn (mentor)
2011-01-18 21:47:30 +00:00
Andreas Tobler
b919d343a9 Remove unused variable. Spotted by a cppcheck
(devel/cppcheck, http://sourceforge.net/projects/cppcheck) run.

Approved by: nwhitehorn (mentor)
2011-01-15 19:16:56 +00:00
Andreas Tobler
7cea3d952b On the Xserve G5 we find the LM75 instead of the DS1775. The core
functionality is the same, a difference is that the DS1775 has a better
precision than the LM75. But we do not use it in our setup. Make the
LM75 work the same as the DS1775.

Fix a typo in device_set_desc.

Tested by: Paul Mather <paul at gromit dlib vt edu>

Approved by:	nwhitehorn (mentor)
2010-12-10 20:27:50 +00:00
Nathan Whitehorn
134a9563c7 Provide support for IIC_M_NOSTOP/IIC_M_NOSTART for bit-banging and
otherwise low-level controllers.

Reviewed by:	thompsa
2010-11-08 19:53:16 +00:00