Commit graph

256 commits

Author SHA1 Message Date
Marek Vasut
b567b8ff79 I2C: Add i2c_get/set_speed() to mxc_i2c.c
Signed-off-by: Marek Vasut <marek.vasut@gmail.com>
Cc: Stefano Babic <sbabic@denx.de>
Cc: Heiko Schocher <hs@denx.de>
Acked-by: Heiko Schocher <hs@denx.de>
2011-10-27 21:56:30 +02:00
Lei Wen
d308c9d35a I2C: mv_i2c: fix multi-bus init issue
When enable the multi-bus, the current_bus is not inited in the original
implementation, which make the i2c operation unpredicatable.

Signed-off-by: Lei Wen <leiwen@marvell.com>
2011-10-03 11:50:09 +02:00
Lei Wen
2be1ed349c I2C: mv_i2c: fix build issue when enable debug option
When DEBUG_I2C is open, the following build issue would shows up.

mv_i2c.c: In function 'i2c_transfer':
mv_i2c.c:257: error: 'ISR' undeclared (first use in this function)
mv_i2c.c:257: error: (Each undeclared identifier is reported only once
mv_i2c.c:257: error: for each function it appears in.)

Signed-off-by: Lei Wen <leiwen@marvell.com>
2011-10-03 11:47:07 +02:00
Graeme Russ
e3e454cd72 console: Squelch pre-console output in console functions
There are some locations in the code which anticipate printf() being called
before the console is ready by squelching printf() on gd->have_console.
Move this squelching into printf(), vprintf(), puts() and putc(). Also
make tstc() and getc() return 0 if console is not yet initialised

Signed-off-by: Graeme Russ <graeme.russ@gmail.com>
Tested-by: Simon Glass <sjg@chromium.org>
2011-10-01 21:54:49 +02:00
Marek Vasut
db84140bb7 I2C: mxc_i2c rework
Rewrite the mxc_i2c driver.
 * This version is much closer to Linux implementation.
 * Fixes IPG_PERCLK being incorrectly used as clock source
 * Fixes behaviour of the driver on iMX51
 * Clean up coding style a bit ;-)

Signed-off-by: Marek Vasut <marek.vasut@gmail.com>
Cc: Stefano Babic <sbabic@denx.de>
Cc: Heiko Schocher <hs@denx.de>
Cc: Jason Hui <jason.hui@linaro.org>
Acked-by: Jason Liu <jason.hui@linro.org>
Acked-by: Heiko Schocher <hs@denx.de>
Tested-by: Jason Liu <jason.hui@linro.org>
2011-09-30 22:01:05 +02:00
Heiko Schocher
49d6da6032 i2c, davinci: add i2c set speed
Signed-off-by: Heiko Schocher <hs@denx.de>
Cc: Paulraj Sandeep <s-paulraj@ti.com>
Cc: Albert ARIBAUD <albert.u.boot@aribaud.net>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>
2011-09-30 22:00:56 +02:00
Michael Jones
89677b27d3 ARMV7: OMAP: I2C driver: cosmetic: make checkpatch-compatible
Signed-off-by: Michael Jones <michael.jones@matrix-vision.de>
Acked-by: Heiko Schocher <hs@denx.de>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>
2011-09-12 17:40:48 +02:00
Michael Jones
0607e2b97a ARMV7: OMAP: Write more than 1 byte at a time in i2c_write
This allows the EEPROM layer to send a single i2c write command
per page, and wait CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS between
i2c write commands.

Signed-off-by: Michael Jones <michael.jones@matrix-vision.de>
Acked-by: Heiko Schocher <hs@denx.de>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>
2011-09-12 17:40:48 +02:00
Stefano Babic
30032710ed I2C: mxc: fix compilation for MX31
Signed-off-by: Stefano Babic <sbabic@denx.de>
CC: Heiko Schocher <hs@denx.de>
Acked-by: Heiko Schocher <hs@denx.de>
2011-09-07 22:11:47 +02:00
Michael Jones
f9a78b8d4f cosmetic: spell fixes etc.
Signed-off-by: Michael Jones <michael.jones@matrix-vision.de>
Acked-by: Detlev Zundel <dzu@denx.de>
2011-07-28 16:32:50 +02:00
Michael Brandt
d3d6427a3f I2C: Add driver for ST-Ericsson U8500 i2c
Signed-off-by: John Rigby <john.rigby@linaro.org>
CC: Heiko Schocher <hs@denx.de>
2011-06-01 19:22:47 +02:00
Heiko Schocher
4bd5566ee8 i2c, soft_i2c: deblock bus if switching to another i2c bus
Deblock i2c bus when switching to another i2c bus, if using
i2c_set_bus_num().

Signed-off-by: Heiko Schocher <hs@denx.de>
cc: Wolfgang Denk <wd@denx.de>
cc: Detlev Zundel <dzu@denx.de>
cc: Valentin Longchamp <valentin.longchamp@keymile.com>
cc: Holger Brunck <holger.brunck@keymile.com>
Signed-off-by: Valentin Longchamp <valentin.longchamp@keymile.com>
2011-04-28 10:57:08 +02:00
Albert ARIBAUD
57b4bce996 Replace obsolete e-mail address
Signed-off-by: Albert ARIBAUD <albert.u.boot@aribaud.net>
2011-04-27 19:38:09 +02:00
Lei Wen
adb00bb6a0 I2C: mv_i2c: add multi bus support
Add the ability to support multiple i2c bus for mv_i2c

Acked-by: Heiko Schocher <hs@denx.de>
Acked-by: Prafulla Wadaskar <prafulla@marvell.com>
Signed-off-by: Lei Wen <leiwen@marvell.com>
2011-04-27 19:38:08 +02:00
Lei Wen
3df619ec2c mv_i2c: use structure to replace the direclty define
Add i2c_clk_enable in the cpu specific code, since previous platform it,
while new platform don't need. In the pantheon and armada100 platform,
this function is defined as NULL one.

Acked-by: Heiko Schocher <hs@denx.de>
Acked-by: Prafulla Wadaskar <prafulla@marvell.com>
Signed-off-by: Lei Wen <leiwen@marvell.com>
2011-04-27 19:38:08 +02:00
Lei Wen
879de1275a mv_i2c: fix timeout value to be consistent with comments
The original 10000 value would be 100ms, which is not
the comments said.

Acked-by: Heiko Schocher <hs@denx.de>
Acked-by: Prafulla Wadaskar <prafulla@marvell.com>
Signed-off-by: Lei Wen <leiwen@marvell.com>
2011-04-27 19:38:07 +02:00
Lei Wen
68432c2743 pxa: move i2c driver to the common place
For better sharing with other platform other than pxa's,
it is more convenient to put the driver to the common place.

Acked-by: Heiko Schocher <hs@denx.de>
Acked-by: Prafulla Wadaskar <prafulla@marvell.com>
Signed-off-by: Lei Wen <leiwen@marvell.com>
2011-04-27 19:38:07 +02:00
Stefano Babic
8627111543 IMX: MX31: Cleanup include files and drop nasty #ifdef in drivers
As exception among the i.MX processors, the i.MX31 has headers
without general names (mx31-regs.h, mx31.h instead of imx-regs.h and
clock.h). This requires several nasty #ifdef in the drivers to
include the correct header. The patch cleans up the driver and
renames the header files as for the other i.MX processors.

Signed-off-by: Stefano Babic <sbabic@denx.de>
2011-04-27 19:38:05 +02:00
Nick Thompson
0e57968a21 I2C: OMAP: detect more devices when probing an i2c bus
The omap24xx driver only seems to support devices that have a single subaddress
byte. With these types of devices, the first access in a bus transaction is
usually a write (writes the subaddress) followed by either a read or write to
access the devices registers.

Many such devices will respond to a read as the first access, but there are at
least some that will NACK such a read. (e.g. ADV7180.)

The probe function attempts to detect a devices ACK to a read access only and
fails to find devices that NACK a read.

This commit modifies the probe function to start a write instead. This detects
devices that respond to reads (since they must also respond to writes) as well
as those that only respond to writes. The bus is immediately set to idle after a
(N)ACK avoiding actually writing anything to the device.

Signed-off-by: Nick Thompson <nick.thompson@ge.com>
2011-04-14 08:33:23 +02:00
Stefano Babic
81687212ee I2C: mxc_i2c: address failure with mx35 processor
There is sporadic failures when more as one I2C slave
is on the bus and the processor tries to communicate
with more as one slave.
The problem was seen on a mx35pdk (two I2C slaves,
PMIC controller and CAN/RTC chip).

The current driver uses the IIF bit in the status register
to check if the bus is busy or not. According to the manual,
this is not correct, because the IIB bit should be checked.
Not only, to check if a transfer is finished must be checked
the ICF bit, and this is not tested at all.

This patch comes from analyse with a corresponding driver
provided by Freescale as part of the LTIB tool. Comparing
the two drivers, it appears that the current u-boot driver checks
the wrong bits, and depending on race condition, the transfer
can be successful or not.

The patch gets rid also of own debug function (DPRINTF),
replaced with the general debug().

Tested on Freescale mx35pdk.

Signed-off-by: Stefano Babic <sbabic@denx.de>
CC: Heiko Schocher <hs@denx.de>
Acked-by: Heiko Schocher <hs@denx.de>
2011-02-02 00:54:43 +01:00
Stefano Babic
1d549ade61 I2C: mxc_i2c: get rid of __REG access
This driver accesses to processor's register
via __REG macros, that are removed (or are planned
to be removed) and replaced by C structures.
This patches replaces all occurrencies of __REG macros.

Signed-off-by: Stefano Babic <sbabic@denx.de>
CC: Heiko Schocher <hs@denx.de>
Acked-by: Heiko Schocher <hs@denx.de>
2011-02-02 00:54:42 +01:00
Stefano Babic
04220612f6 mxc_i2c: Add support for the i.MX35 processor
Signed-off-by: Stefano Babic <sbabic@denx.de>
CC: Heiko Schocher <hs@denx.de>
Acked-by: Heiko Schocher <hs@denx.de>
2011-02-02 00:54:42 +01:00
Liu Hui-R64343
127cec1889 mxc_i2c: add support for MX53 processor
This patch add I2C support for Freescale MX53 processor

Signed-off-by: Jason Liu <r64343@freescale.com>
2011-02-02 00:54:42 +01:00
Ryan Mallon
f3100ff767 Fix at91 includes in soft_i2c driver
Make at91 header includes in soft_i2c depend only on CONFIG_AT91FAMILY
rather than individual SoCs.

Signed-off-by: Ryan Mallon <ryan@bluewatersys.com>
Acked-by: Reinhard Meyer<u-boot@emk-elektronik.de>
2011-01-27 07:27:32 +01:00
John Rigby
2956532625 Move DECLARE_GLOBAL_DATA_PTR to file scope
It can be optimised out by the compiler otherwise resulting
in obscure errors like a board not booting.

This has been documented in README since 2006 when these were
first fixed up for GCC 4.x.

Signed-off-by: John Rigby <john.rigby@linaro.org>

Fix some additional places.

Signed-off-by: Wolfgang Denk <wd@denx.de>
Acked-By: Albert ARIBAUD <albert.aribaud@free.fr>
2010-12-21 11:33:36 +01:00
Sebastien Carlier
6d8962e814 Switch from archive libraries to partial linking
Before this commit, weak symbols were not overridden by non-weak symbols
found in archive libraries when linking with recent versions of
binutils.  As stated in the System V ABI, "the link editor does not
extract archive members to resolve undefined weak symbols".

This commit changes all Makefiles to use partial linking (ld -r) instead
of creating library archives, which forces all symbols to participate in
linking, allowing non-weak symbols to override weak symbols as intended.
This approach is also used by Linux, from which the gmake function
cmd_link_o_target (defined in config.mk and used in all Makefiles) is
inspired.

The name of each former library archive is preserved except for
extensions which change from ".a" to ".o".  This commit updates
references accordingly where needed, in particular in some linker
scripts.

This commit reveals board configurations that exclude some features but
include source files that depend these disabled features in the build,
resulting in undefined symbols.  Known such cases include:
- disabling CMD_NET but not CMD_NFS;
- enabling CONFIG_OF_LIBFDT but not CONFIG_QE.

Signed-off-by: Sebastien Carlier <sebastien.carlier@gmail.com>
2010-11-17 21:02:18 +01:00
Wolfgang Denk
17dd883c5b Merge branch 'master' of git://git.denx.de/u-boot-samsung 2010-10-29 21:47:48 +02:00
C Nauman
d9abba8254 Add generic support for samsung s3c2440
This patch adds generic support for the Samsung s3c2440 processor.

Global s3c24x0 changes to struct members converting from upper case to
lower case.

Signed-off-by: Craig Nauman <cnauman@diagraph.com>
Cc: kevin.morfitt@fearnside-systems.co.uk
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
2010-10-28 15:35:56 +09:00
Steve Sakoman
4df6689495 ARMV7: OMAP: I2C driver: Fix bug found in 37XX testing
On OMAP36/37XX the standard on chip pullups are not sufficient to
ensure proper i2c operation without external pullups or switching
to high speed mode and enabling special on chip pullups.

This is an issue for Beagle xM, which does not have external pullups
on the expansion board i2c lines.

The issue manifests itself as an AL (arbitration lost) error when
probing for a non-existent device (i.e. on a Beagle xM with no expansion
boards attached).  This issue does not occur on expansion boards that
include pullups or on Overo 37XX COM's since they include pull-ups.

This patch fixes the issue by checking for the AL bit in the i2c_probe
function.

Signed-off-by: Steve Sakoman <steve.sakoman@linaro.org>
2010-10-25 07:57:20 +02:00
Steve Sakoman
fbad355562 ARMV7: OMAP: I2C driver: Restructure i2c_probe function
This patch removes the "magic number" delays and instead
monitors state changes in the status register bits.

Signed-off-by: Steve Sakoman <steve.sakoman@linaro.org>
Tested-by: Heiko Schocher <hs@denx.de>
2010-10-20 15:28:48 +02:00
Steve Sakoman
d480c46773 ARMV7: OMAP: I2C driver: Restructure i2c_write_byte function
This patch removes the "magic number" delays and instead
monitors state changes in the status register bits.

Signed-off-by: Steve Sakoman <steve.sakoman@linaro.org>
Tested-by: Heiko Schocher <hs@denx.de>
2010-10-20 15:28:41 +02:00
Steve Sakoman
da0cc665bc ARMV7: OMAP: I2C driver: Restructure i2c_read_byte function
This patch removes the "magic number" delays and instead
monitors state changes in the status register bits.

Signed-off-by: Steve Sakoman <steve.sakomanlinaro.org>
Tested-by: Heiko Schocher <hs@denx.de>
2010-10-20 15:28:37 +02:00
Steve Sakoman
73e8747fe4 ARMV7: OMAP: I2C driver: Use same timeout value as linux kernel driver
This patch matches the poll interval (1 millisecond) and timeout (1 second)
used in the linux driver. It also adds a return value of 0 in the event of
a timeout error and cleans up some formatting errors in that section of the
code.

Signed-off-by: Steve Sakoman <steve.sakoman@linaro.org>
Tested-by: Heiko Schocher <hs@denx.de>
2010-10-20 15:28:33 +02:00
Stefan Roese
b36df56115 ppc4xx: Move ppc4xx headers to powerpc include directory
This patch moves some ppc4xx related headers from the common include
directory (include/) to the powerpc specific one
(arch/powerpc/include/asm/). This way to common include directory is not
so cluttered with files.

Signed-off-by: Stefan Roese <sr@denx.de>
2010-09-23 09:02:05 +02:00
Heiko Schocher
1724fe9adf i2c, omap24xx: set bus_initialized only after relocation.
Portions of this work were supported by funding from
the CE Linux Forum.

Signed-off-by: Heiko Schocher <hs@denx.de>
2010-09-19 19:29:52 +02:00
Wolfgang Denk
2d941de9d5 Prepare v2010.09-rc1
Coding style cleanup.

Signed-off-by: Wolfgang Denk <wd@denx.de>
2010-09-10 00:16:19 +02:00
Albert Aribaud
306563a773 i2c: rewrite mvtwsi, support orion5x and kirkwood
This rewrite of the mvtwsi driver is 25% smaller and much
faster and simpler than the previous code.

Signed-off-by: Albert Aribaud <albert.aribaud@free.fr>
Acked-by: Prafulla Wadaskar<prafulla@marvell.com>
Acked-by: Heiko Schocher<hs@denx.de>
2010-08-30 14:10:35 +02:00
Albert Aribaud
01ec99d969 i2c: rename kirkwood_i2c to mvtwsi
This driver is not kirkwood-specific and can also be used
e.g. by orion5x. Rename to a SoC-neutral name.

Signed-off-by: Albert Aribaud <albert.aribaud@free.fr>
Acked-by: Prafulla Wadaskar<prafulla@marvell.com>
Acked-by: Heiko Schocher<hs@denx.de>
2010-08-30 14:10:23 +02:00
Nishanth Menon
07cf5e207e i2c: omap2+: change header guard to be generic
Make the header guard to be generic to stop conflicting with
omap2 i2c header file arch/arm/include/asm/arch-omap24xx/i2c.h

Cc: Steve Sakoman <steve@sakoman.com>
Cc: Heiko <hs@denx.de>
Cc: Sandeep Paulraj <s-paulraj@ti.com>
Cc: Wolfang Denk <wd@denx.de>

Signed-off-by: Nishanth Menon <nm@ti.com>
Acked-by: Steve Sakoman <steve@sakoman.com>
2010-08-23 08:08:31 +02:00
Steve Sakoman
d708395d2f ARMV7: Modify i2c driver for more reliable operation on OMAP4
This patch modifies the init routine to follow the TRM
recommendations. It also modifies the i2c_read_byte function
to reflect subtle differences between the i2c controller in
OMAP3 and OMAP4.

Signed-off-by:  Steve Sakoman <steve@sakoman.com>
Acked-by: Nishanth Menon <menon.nishanth@gmail.com>
Acked-by: Heiko Schocher <hs@denx.de>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>
2010-08-05 10:11:24 -04:00
Mike Frysinger
793b5726f7 i2c: soft_i2c: add simple GPIO implementation
Since the vast majority of GPIO I2C implementations behave the same way,
support the common GPIO framework with default settings.

This adds two new defines CONFIG_SOFT_I2C_GPIO_{SCL,SDA} so that boards
which want GPIO I2C support need only define these.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Tested-by: Thomas Chou <thomas@wytron.com.tw>
2010-07-22 08:03:47 +02:00
Steve Sakoman
938717cee1 ARMV7: Restructure OMAP i2c driver to allow code sharing between OMAP3 and OMAP4
This patch modifies the omap24xx driver so that it will also work with OMAP4.

Signed-off-by: Steve Sakoman <steve@sakoman.com>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>
2010-07-05 20:00:10 -04:00
Mike Frysinger
b5cebb4fd6 Blackfin: TWI/I2C: implement multibus support
In order to do this cleanly, the register accesses have to be converted to
a C struct (base pointer), so do that in the process.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2010-05-05 10:04:38 +02:00
Richard Retanubun
26a33504a5 fsl_i2c: Added a callpoint for i2c_board_late_init
This patch adds a callpoint in i2c_init that allows board specific
i2c board initialization (typically for i2c bus reset) that is called
after i2c_init operations, allowing the i2c_board_late_init function
to use the pre-configured i2c bus speed and slave address.
2010-04-19 07:46:35 +02:00
Peter Tyser
61f2b38a17 Replace "#include <asm-$ARCH/$FILE>" with "#include <asm/$FILE>"
The appropriate include/asm-$ARCH directory should already by symlinked
to include/asm so using the whole "asm-$ARCH" path is unnecessary.

This change should also allow us to move the include/asm-$ARCH
directories into their appropriate lib/$ARCH/ directories.

Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
2010-04-13 09:13:04 +02:00
Stefan Roese
d0b0dcaa22 i2c: Move PPC4xx I2C driver into drivers/i2c directory
This patch moves the PPC4xx specific I2C device driver into the I2C
drivers directory. All 4xx config headers are updated to include this
driver.

Signed-off-by: Stefan Roese <sr@denx.de>
2010-04-06 08:10:41 +02:00
Thomas Weber
5647f78d04 mod change 755 => 644 for multiple files
I executed 'find . -name "*.[chS]" -perm 755 -exec chmod 644 {} \;'

Signed-off-by: Thomas Weber <swirl@gmx.li>
Add some more: neither Makefile nor config.mk need execute permissions.
Signed-off-by: Wolfgang Denk <wd@denx.de>
2010-03-21 22:22:53 +01:00
Jens Scharsig
0cf0b93161 convert common files to new SoC access
* add's a warning to all files, which need update to new SoC access
 * convert common files in cpu/../at91 and a lot of drivers to use
   c stucture SoC access

Signed-off-by: Jens Scharsig <js_at_ng@scharsoft.de>
2010-02-12 12:31:55 -06:00
Vipin KUMAR
2403f8f417 SPEAr : i2c driver support added for SPEAr SoCs
SPEAr SoCs contain a synopsys i2c controller.
This patch adds the driver for this IP.

Signed-off-by: Vipin <vipin.kumar@st.com>
2010-01-23 08:15:49 -06:00
Prafulla Wadaskar
beca04dd24 Kirkwood: Upgated licencing for files imported from linux source to GPLv2 or later
These are few files directly imported from Linux kernel source.
Those are not modifyed at all ar per strategy.
These files contains source with GPLv2 only
whereas u-boot expects GPLv2 or latter

These files are updated for the same from prior permission from original writes

Acked-by: Nicolas Pitre <nico@marvell.com>
Signed-off-by: Prafulla Wadaskar <prafulla@marvell.com>
2010-01-23 08:15:48 -06:00
kevin.morfitt@fearnside-systems.co.uk
ac67804fbb Add a unified s3c24x0 header file
This patch adds a unified s3c24x0 cpu header file that selects the header
file for the specific s3c24x0 cpu from the SOC and CPU configs defined in
board config file. This removes the current chain of s3c24-type #ifdef's
from the s3c24x0 code.

Signed-off-by: Kevin Morfitt <kevin.morfitt@fearnside-systems.co.uk>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
2009-11-27 16:26:13 -06:00
kevin.morfitt@fearnside-systems.co.uk
492fb1fdbc Move s3c24x0 header files to asm-arm/arch-s3c24x0/
This patch moves the s3c24x0 header files from include/ to
include/asm-arm/arch-s3c24x0/.

checkpatch.pl showed 2 errors and 3 warnings. The 2 errors were both due
to a non-UTF8 character in David M?ller's name:

ERROR: Invalid UTF-8, patch and commit message should be encoded in UTF-8
#489: FILE: include/asm-arm/arch-s3c24x0/s3c2410.h:3:
+ * David M?ller ELSOFT AG Switzerland. d.mueller@elsoft.ch

As David's name correctly contains a non-UTF8 character I haven't fixed
these errors.

The 3 warnings were all because of the use of 'volatile' in s3c24x0.h:

WARNING: Use of volatile is usually wrong: see Documentation/volatile-considered-harmful.txt
#673: FILE: include/asm-arm/arch-s3c24x0/s3c24x0.h:35:
+typedef volatile u8	S3C24X0_REG8;
+typedef volatile u16	S3C24X0_REG16;
+typedef volatile u32	S3C24X0_REG32;

I'll fix these errors in another patch.

Tested by running MAKEALL for ARM8 targets and ensuring there were no new
errors or warnings.

Signed-off-by: Kevin Morfitt <kevin.morfitt@fearnside-systems.co.uk>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
2009-11-27 16:26:12 -06:00
Daniel Gorsulowski
4e574c4e2d at91: Extended soft_i2c driver for AT91SAM9263 SoC
While hard_i2c support is not available
(see http://lists.denx.de/pipermail/u-boot/2009-March/049751.html),
this patch enables soft_i2c on AT91SAM9263 SoC.

Signed-off-by: Daniel Gorsulowski <Daniel.Gorsulowski@esd.eu>
2009-11-23 09:26:54 +01:00
Dirk Behme
1d2e96de56 OMAP2/3: I2C: Add support for second and third bus
Add support to use second and third I2C bus, too.

Bus 0 is still the default, but by calling i2c_set_bus_num(1/2) before doing
I2C accesses, code can switch to bus 1 and 2, too. Don't forget to switch
back afterwards, then.

Signed-off-by: Dirk Behme <dirk.behme@googlemail.com>
2009-11-16 07:25:15 +01:00
Valentin Yakovenkov
08ea550eef new PCA9564 i2c bridge driver
Signed-off-by: Valentin Yakovenkov <yakovenkov@niistt.ru>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-10-30 15:10:58 +01:00
Mike Frysinger
08a1c6258c Blackfin: TWI/I2C: implement bus speed get/set functions
While we're here, improve the speed calculation a bit to match the HRM.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-10-30 15:10:58 +01:00
Mike Frysinger
3814ea4f00 Blackfin: TWI/I2C: add timeout to transfer
The current transfer code relies on ctrlc() to abort transfers, but this
requires user interactivity.  Naturalize the process with a timeout.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-10-30 15:10:58 +01:00
kevin.morfitt@fearnside-systems.co.uk
eb0ae7f549 Clean-up of s3c24x0 drivers excluding nand driver
This patch re-formats the arm920t s3c24x0 driver files, excluding the nand
driver, in preparation for changes to add support for the Embest SBC2440-II Board.

The changes are as follows:
- re-indent the code using Lindent
- make sure register layouts are defined using a C struct
- replace the upper-case typedef'ed C struct names with lower case
  non-typedef'ed ones
- make sure registers are accessed using the proper accessor functions
- run checkpatch.pl and fix any error reports

It assumes the following patch has been applied first:
- [U-Boot][PATCH-ARM] CONFIG_SYS_HZ fix for ARM902T S3C24X0 Boards, 05/09/2009
- patches 1/4 and 2/4 of this series

Tested on an Embest SBC2440-II Board with local u-boot patches as I don't have
any s3c2400 or s3c2410 boards but need this patch applying before I can submit
patches for the SBC2440-II Board. Also, temporarily modified sbc2410x, smdk2400,
smdk2410 and trab configs to use the mtd nand driver (which isn't used by any
board at the moment), ran MAKEALL for all ARM9 targets and no new warnings or
errors were found.

Signed-off-by: Kevin Morfitt <kevin.morfitt@fearnside-systems.co.uk>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
2009-10-13 21:13:56 -05:00
Joakim Tjernlund
d1c9e5b379 fsl_i2c: Do not generate STOP after read.
__i2c_read always ends with a STOP condition thereby releasing
the bus. It is cleaner to do the STOP magic in i2c_read(), like
i2c_write() does. This may also help future multimaster systems which
wants to hold on to the bus until all transactions are finished.

Signed-off-by: Joakim Tjernlund <Joakim.Tjernlund@transmode.se>
2009-09-28 07:35:56 +02:00
Joakim Tjernlund
9940420212 fsl_i2c: Impl. AN2919, rev 5 to calculate FDR/DFSR
The latest AN2919 has changed the way FDR/DFSR should be calculated.
Update the driver according to spec. However, Condition 2
is not accounted for as it is not clear how to do so.

Signed-off-by: Joakim Tjernlund <Joakim.Tjernlund@transmode.se>
Acked-by: Wolfgang Grandegger <wg@grandegger.com>
2009-09-28 07:35:54 +02:00
Joakim Tjernlund
d01ee4db93 fsl_i2c: Add CONFIG_FSL_I2C_CUSTOM_{DFSR/FDR}
Some boards need a higher DFSR value than the spec currently
recommends so give these boards the means to define there own.

For completeness, add CONFIG_FSL_I2C_CUSTOM_FDR too.

Signed-off-by: Joakim Tjernlund <Joakim.Tjernlund@transmode.se>
2009-09-28 07:35:53 +02:00
Joakim Tjernlund
21f4cbb772 fsl_i2c: Wait for STOP condition to propagate
After issuing a STOP one must wait until the STOP has completed
on the bus before doing something new to the controller.

Also add an extra read of SR as the manual mentions doing that
is a good idea.

Remove surplus write of CR just before a write, isn't required and
could potentially disturb the I2C bus.

Signed-off-by: Joakim Tjernlund <Joakim.Tjernlund@transmode.se>
2009-09-28 07:35:52 +02:00
Timur Tabi
92477a631b fsl_i2c: increase I2C timeout values and make them configurable
The value of I2C_TIMEOUT in fsl_i2c.c has several problems.  First, it is
defined as CONFIG_HZ/4, but it is used as a count of microseconds, so it makes
no sense to derive it from a clock rate.  Second, the current value (250) is
too low for some boards, so it needs to be increased.  Third, the timeout
necessary for multiple-master arbitration is larger than the timeout for basic
read/write operations, so we shouldn't have a single constant for both timeouts.
Finally, it would be nice if we could override these values on a per-board
basis.

Signed-off-by: Timur Tabi <timur@freescale.com>
Acked-by: Wolfgang Denk <wd@denx.de>
Tested-by: Peter Tyser <ptyser@xes-inc.com>
Acked-by: Peter Tyser <ptyser@xes-inc.com>
2009-09-06 11:26:05 +02:00
Wolfgang Denk
53cc18c71b Minor coding style cleanup.
Signed-off-by: Wolfgang Denk <wd@denx.de>
2009-08-10 10:38:34 +02:00
Tom Rix
7f79dfb48b OMAP I2C Fix the sampling clock.
This problem is seen on Zoom1 and Zoom2 in the startup and
when i2c probe is used

Before :

In:    serial
Out:   serial
Err:   serial
timed out in wait_for_bb: I2C_STAT=1000
timed out in wait_for_bb: I2C_STAT=1000
timed out in wait_for_bb: I2C_STAT=1000
timed out in wait_for_pin: I2C_STAT=1000
I2C read: I/O error
timed out in wait_for_bb: I2C_STAT=1000
timed out in wait_for_bb: I2C_STAT=1000
Die ID #327c00020000000004013ddd05026013
Hit any key to stop autoboot:  0
OMAP3 Zoom1# i2c probe
Valid chip addresses:timed out in wait_for_bb: I2C_STAT=1000
 02 03 04 05 06 07 08 09 0A 0B 0C 0D <snip>

After :

In:    serial
Out:   serial
Err:   serial
Die ID #327c00020000000004013ddd05026013
Hit any key to stop autoboot:  0
OMAP3 Zoom1# i2c probe
Valid chip addresses: 48 49 4A 4B

The addresses are for the twl4030.

The prescalar that converts the function clock to the sampling
clock is hardcoded to 0.  The reference manual recommends 7
if the function clock is 96MHz.

Instead of just changing the hardcoded values, the prescalar
is calculated from the value I2C_IP_CLK.

The i2c #defines are in kHz.  The speed passed into the
i2c init routine is in Hz.  To be consistent, change the
defines to be in Hz.

The timing calculations are based on what is done in the
linux 2.6.30 kernel in drivers/i2c/buses/i2c_omap.c as
apposed to what is done in TRM.

The major variables in the timing caculations are
specified as #defines that can be overriden as required.

The variables and their defaults are

I2C_IP_CLK				SYSTEM_CLOCK_96
I2C_INTERNAL_SAMPLING_CLK		19200000
I2C_FASTSPEED_SCLL_TRIM			6
I2C_FASTSPEED_SCLH_TRIM			6
I2C_HIGHSPEED_PHASE_ONE_SCLL_TRIM	I2C_FASTSPEED_SCLL_TRIM
I2C_HIGHSPEED_PHASE_ONE_SCLH_TRIM	I2C_FASTSPEED_SCLH_TRIM
I2C_HIGHSPEED_PHASE_TWO_SCLL_TRIM	I2C_FASTSPEED_SCLL_TRIM
I2C_HIGHSPEED_PHASE_TWO_SCLH		I2C_FASTSPEED_SCLH_TRIM

This was runtime verified on Zoom1, Zoom2, Beagle and Overo.
The 400kHz and 3.4M cases were verifed on test Zoom1,
Zoom2, Beagle and Overo configurations.

Testing for omap2 will be done in a second step as Nishanth
and Jean-Christophe commented.

Signed-off-by: Tom Rix <Tom.Rix@windriver.com>
Acked-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Acked-by: Heiko Schocher <hs@denx.de>
2009-07-28 08:52:33 +02:00
Heiko Schocher
4ce5a72851 arm, i2c: added support for the TWSI I2C Interface
Signed-off-by: Heiko Schocher <hs@denx.de>
2009-07-28 08:20:58 +02:00
Heiko Schocher
39df00d9ae i2c, mpc83xx: add CONFIG_SYS_I2C_INIT_BOARD for fsl_i2c
This patch adds the possibility to call a board specific
i2c bus reset routine for the fsl_i2c bus driver, and adds
this option for the keymile kmeter1 board.

The deblock sequence for this board is implemented and
tested in the following way:

CR = 0x20 (release SDA and SCL pin)
CR = 0xa0 (start read)
dummy read
dummy read
if 2. dummy read == 0x00
	3. dummy read

CR = 0x80 (SDA and SCL now 1 SR = 0x86)
CR = 0x00 (Modul reset SR=0x81)
CR = 0x80 (SDA and SCL = 1, SR = 0x81)

Signed-off-by: Heiko Schocher <hs@denx.de>
2009-07-21 07:06:26 +02:00
Peter Meerwald
98ab14e858 Blackfin: TWI/I2C: fix pure writes
If doing a pure write with register address and data (not a read/write
combo transfer), we don't set the initial transfer length properly which
ends up causing only the register address to be transferred.

While we're here, fix the i2c_write() parameter description of the buffer.

Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-06-30 08:27:45 +02:00
Peter Tyser
0f89c54be9 i2c: Update references to individual i2c commands
The individual i2c commands imd, imm, inm, imw, icrc32, iprobe, iloop,
and isdram are no longer available so all references to them have been
updated to the new form of "i2c <cmd>".

Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
2009-06-12 20:39:46 +02:00
Peter Tyser
655b34a78a i2c: Create common default i2c_[set|get]_bus_speed() functions
New default, weak i2c_get_bus_speed() and i2c_set_bus_speed() functions
replace a number of architecture-specific implementations.

Also, providing default functions will allow all boards to enable
CONFIG_I2C_CMD_TREE.  This was previously not possible since the
tree-form of the i2c command provides the ability to display and modify
the i2c bus speed which requires i2c_[set|get]_bus_speed() to be
present.

Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
2009-06-12 20:39:45 +02:00
Peter Tyser
f0722ee762 tsi108_i2c: Add i2c_init() stub function
Add the i2c_init() function so that the tsi108_i2c.c driver fits
U-Boot's standard I2C API which is utilized by cmd_i2c.c

Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
2009-06-12 20:39:45 +02:00
Wolfgang Denk
dfc91c3395 Merge branch 'master' of git://git.denx.de/u-boot-arm 2009-04-02 00:24:33 +02:00
Jens Scharsig
d144f94d59 soft_i2c.c compiler/linker error
This patch fix the compiler/linker errors

common/cmd_i2c.c:1252: undefined reference to `i2c_get_bus_speed'
common/cmd_i2c.c:1256: undefined reference to `i2c_set_bus_speed'

if board use CONFIG_I2C_CMD_TREE and CONFIG_I2C_MULTI_BUS is not
uesd/undef (wrong define order)

and

removes additional empty lines

Signed-off-by: Jens Scharsig <esw@bus-elektronik.de>
2009-03-31 08:29:50 +02:00
Jean-Christophe PLAGNIOL-VILLARD
d3b6357741 s3c24x0: move i2c driver to drivers/i2c
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
2009-03-30 18:58:40 +02:00
Jean-Christophe PLAGNIOL-VILLARD
942ba9969b davinci: move i2c driver to drivers/i2c
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
2009-03-30 18:58:39 +02:00
Jean-Christophe PLAGNIOL-VILLARD
50f601cca8 s3c44b0: move i2c driver to drivers/i2c
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
2009-03-29 23:01:40 +02:00
Heiko Schocher
1b6275dfb1 8xx: add support for new keymile kmsupx4 board.
This patch adds support for the kmsupx4 board from Keymile,
based on a Freescale MPC852T CPU

- serial console on SMC1
- 32 MB SDRAM
- 32 MB NOR Flash
- Ethernet over SCC3
- I2C Bitbang

Signed-off-by: Heiko Schocher <hs@denx.de>
2009-03-18 20:50:05 +01:00
Heiko Schocher
c1bce4fff7 83xx, i2c: add mux support for fsl_i2c
This patch adds I2C mux support for the fsl_i2c driver. This
allows you to add "new" i2c busses, which are reached over
i2c muxes. For more infos, please look in the README and
search for CONFIG_I2C_MUX.

Signed-off-by: Heiko Schocher <hs@denx.de>
Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
2009-03-05 18:21:17 -06:00
Guennadi Liakhovetski
e7de18afe8 i.MX31: Start the I2C clock on driver initialisation
i.MX31 powers on with most clocks running, so, after a power on this explicit
clock start up is not required. However, as Linux boots it disables most clocks
to save power. This includes the I2C clock. If we then soft reboot from Linux
the I2C clock stays off. This breaks the phycore, which has its environment in
I2C EEPROM. Fix the problem by explicitly starting the clock in I2C driver
initialisation routine.

Signed-off-by: Guennadi Liakhovetski <lg@denx.de>
Ack-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
2009-02-14 10:00:51 +01:00
Wolfgang Denk
6c6e042ab3 Merge branch 'master' of git://git.denx.de/u-boot-arm 2009-02-01 21:38:07 +01:00
Mike Frysinger
be853bf86b Blackfin: overhaul i2c driver
The current Blackfin i2c driver does not work properly with certain devices
due to it breaking up transfers incorrectly.  This is a rewrite of the
driver and relocates it to the newer place in the source tree.

Also remove duplicated I2C speed defines in Blackfin board configs and
disable I2C slave address usage since it isn't implemented.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-01-28 13:26:13 -05:00
Andrew Dyer
2ac6985a74 soft_i2c.c add option for repeated start in i2c_read()
This patch adds a #define to optionally change the behaviour of
i2c_read() in soft_i2c.c to send an I2C repeated start instead of a
stop-start between sending the device address pointer write and
reading back the data.  The current behaviour is retained as the
default.

While most devices will work either way, I have a smart battery(*)
that requires repeated start, and someone at some point found a
device that required a stop-start.

(*) http://www.inspired-energy.com/Standard_Products/NL2054/NL2054%20Rev1.0%20Data%20Sheet.pdf

Signed-off-by: Andrew Dyer <adyer@righthandtech.com>
2009-01-27 22:26:31 +01:00
Dirk Behme
7d264c1ef2 OMAP3: Add I2C support
Add I2C support.

Signed-off-by: Dirk Behme <dirk.behme@googlemail.com>
2009-01-24 17:51:22 +01:00
Wolfgang Denk
455ae7e87f Coding style cleanup, update CHANGELOG.
Signed-off-by: Wolfgang Denk <wd@denx.de>
2008-12-16 01:02:17 +01:00
Timur Tabi
ecf5f077c8 i2c: merge all i2c_reg_read() and i2c_reg_write() into inline functions
All implementations of the functions i2c_reg_read() and
i2c_reg_write() are identical. We can save space and simplify the
code by converting these functions into inlines and putting them in
i2c.h.

Signed-off-by: Timur Tabi <timur@freescale.com>
Acked-By: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
2008-12-15 23:46:21 +01:00
Trent Piepho
5e3ab68e9a Section name should be ".data", not "data"
Signed-off-by: Trent Piepho <tpiepho@freescale.com>
Signed-off-by: Wolfgang Denk <wd@denx.de>
2008-12-09 00:48:41 +01:00
Dirk Behme
e23c7c95a9 ARM: OMAP: Convert IO macros
Convert IO macros to readx/writex.

Signed-off-by: Dirk Behme <dirk.behme@gmail.com>
2008-11-21 01:44:35 +01:00
Wolfgang Denk
8ed44d91c8 Cleanup: fix "MHz" spelling
Signed-off-by: Wolfgang Denk <wd@denx.de>
2008-10-21 11:25:39 +02:00
Heiko Schocher
a21ca95f8b mgsuvd: fix compiler warning when using soft_i2c driver
Signed-off-by: Heiko Schocher <hs@denx.de>
2008-10-18 21:54:04 +02:00
Jean-Christophe PLAGNIOL-VILLARD
6d0f6bcf33 rename CFG_ macros to CONFIG_SYS
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
2008-10-18 21:54:03 +02:00
Heiko Schocher
67b23a3228 I2C: adding new "i2c bus" Command to the I2C Subsystem.
With this Command it is possible to add new I2C Busses,
which are behind 1 .. n I2C Muxes. Details see README.

Signed-off-by: Heiko Schocher <hs@denx.de>
2008-10-18 21:54:02 +02:00
Heiko Schocher
4ca107effe soft_i2c: Add CFG_I2C_INIT_BOARD option
This patch adds the option for a boardspecific
I2C deblocking mechanism for the soft i2c driver.

Signed-off-by: Heiko Schocher <hs@denx.de>
2008-10-18 21:54:02 +02:00
Heiko Schocher
98aed37958 soft_i2c: prevent compiler warnings if driver does not use CPU Pins.
This patch fixes the following warnings, when using
the soft_i2c driver using no CPU pins on MPC82xx or MPC8xx
systems:

soft_i2c.c: In function 'send_reset':
soft_i2c.c:93: warning: unused variable 'immr'
soft_i2c.c: In function 'send_start':
soft_i2c.c:124: warning: unused variable 'immr'
soft_i2c.c: In function 'send_stop':
soft_i2c.c:146: warning: unused variable 'immr'
soft_i2c.c: In function 'send_ack':
soft_i2c.c:171: warning: unused variable 'immr'
soft_i2c.c: In function 'write_byte':
soft_i2c.c:196: warning: unused variable 'immr'
soft_i2c.c: In function 'read_byte':
soft_i2c.c:244: warning: unused variable 'immr'

Signed-off-by: Heiko Schocher <hs@denx.de>
2008-10-18 21:54:01 +02:00
Heiko Schocher
799b784aa0 i2c: add CONFIG_I2C_MULTI_BUS for soft_i2c and mpc8260 i2c driver.
Signed-off-by: Heiko Schocher <hs@denx.de>
2008-10-18 21:54:01 +02:00
Wolfgang Denk
e99e9575bb Merge branch 'Makefile' of git://git.denx.de/u-boot-arm 2008-09-01 00:16:29 +02:00
Jean-Christophe PLAGNIOL-VILLARD
4d75e0aa9c soft_i2c: move to drivers/i2c
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
2008-08-29 12:25:02 +02:00
TsiChung Liew
5d9a5efa4b Add I2C frequency dividers for ColdFire
The existing I2C freqency dividers for FDR does not apply
to ColdFire platforms; thus, a seperate table is added
based on MCF5xxx Reference Manual

Signed-off-by: Luigi 'Comio' Mantellini <luigi.mantellini@idf-hit.com>
Signed-off-by: TsiChung Liew <Tsi-Chung.Liew@freescale.com>
Acked-by: Tabi Timur <timur@freescale.com>
2008-08-28 09:16:54 -06:00
Michal Simek
a4a549b4b5 i2c: Clean drivers/i2c/ Makefile
Signed-off-by: Michal Simek <monstr@monstr.eu>
2008-08-18 23:24:01 +02:00
Stefan Roese
f2302d4430 Fix merge problems
Signed-off-by: Stefan Roese <sr@denx.de>
2008-08-06 14:05:38 +02:00
Wolfgang Denk
53677ef18e Big white-space cleanup.
This commit gets rid of a huge amount of silly white-space issues.
Especially, all sequences of SPACEs followed by TAB characters get
removed (unless they appear in print statements).

Also remove all embedded "vim:" and "vi:" statements which hide
indentation problems.

Signed-off-by: Wolfgang Denk <wd@denx.de>
2008-05-21 00:14:08 +02:00
Kumar Gala
3e3f766a52 Fix warnings introduced by I2C bus speed setting patch
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
2008-04-13 14:54:16 -07:00
Sascha Hauer
cdace06612 add an i2c driver for mx31
This patch adds an i2c driver for Freescale i.MX processors

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Guennadi Liakhovetski <lg@denx.de>
2008-04-13 14:21:43 -07:00
Wolfgang Denk
950a392464 Revert merge of git://www.denx.de/git/u-boot-arm, commit 62479b18:
Reverting became necessary after it turned out that the patches in
the u-boot-arm repo were modified, and in some cases corrupted.

This reverts the following commits:

	066bebd635
	7a837b7310
	c88ae20580
	a147e56f03
	d6674e0e2a
	8c8463cce4
	c98b47ad24
	8bf69d8178
	8c16cb0d3b
	a574a73852
	1377b5583a
	1704dc2091

Signed-off-by: Wolfgang Denk <wd@denx.de>
2008-04-11 15:11:26 +02:00
Sascha Hauer
8c8463cce4 add an i2c driver for mx31
This patch adds an i2c driver for Freescale i.MX processors

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Guennadi Liakhovetski <lg@denx.de>
2008-03-30 11:32:16 +01:00
Timur Tabi
d8c82db482 Add support for setting the I2C bus speed in fsl_i2c.c
Add support to the Freescale I2C driver (fsl_i2c.c) for setting and querying
the I2C bus speed.  Current 8[356]xx boards define the CFG_I2C_SPEED macro,
but fsl_i2c.c ignores it and uses conservative value when programming the
I2C bus speed.

Signed-off-by: Timur Tabi <timur@freescale.com>
Acked-by: Andy Fleming <afleming@freescale.com>
2008-03-27 00:09:17 +01:00
Jean-Christophe PLAGNIOL-VILLARD
080c646dbf drivers/i2c : move i2c drivers to drivers/i2c
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
2007-11-20 20:14:18 +01:00