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* fsl_i2c: Impl. AN2919, rev 5 to calculate FDR/DFSRJoakim Tjernlund2009-09-28-35/+55
| | | | | | | | | 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>
* fsl_i2c: Add CONFIG_FSL_I2C_CUSTOM_{DFSR/FDR}Joakim Tjernlund2009-09-28-3/+11
| | | | | | | | | 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>
* fsl_i2c: Wait for STOP condition to propagateJoakim Tjernlund2009-09-28-4/+8
| | | | | | | | | | | | | 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>
* fsl_i2c: increase I2C timeout values and make them configurableTimur Tabi2009-09-06-4/+20
| | | | | | | | | | | | | | | | 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>
* Minor coding style cleanup.Wolfgang Denk2009-08-10-1/+0
| | | | Signed-off-by: Wolfgang Denk <wd@denx.de>
* OMAP I2C Fix the sampling clock.Tom Rix2009-07-28-7/+67
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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>
* arm, i2c: added support for the TWSI I2C InterfaceHeiko Schocher2009-07-28-0/+485
| | | | Signed-off-by: Heiko Schocher <hs@denx.de>
* i2c, mpc83xx: add CONFIG_SYS_I2C_INIT_BOARD for fsl_i2cHeiko Schocher2009-07-21-0/+6
| | | | | | | | | | | | | | | | | | | | | | 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>
* Blackfin: TWI/I2C: fix pure writesPeter Meerwald2009-06-30-2/+2
| | | | | | | | | | | 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>
* i2c: Update references to individual i2c commandsPeter Tyser2009-06-12-1/+1
| | | | | | | | 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>
* i2c: Create common default i2c_[set|get]_bus_speed() functionsPeter Tyser2009-06-12-14/+0
| | | | | | | | | | | | | 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>
* tsi108_i2c: Add i2c_init() stub functionPeter Tyser2009-06-12-0/+9
| | | | | | | 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>
* Merge branch 'master' of git://git.denx.de/u-boot-armWolfgang Denk2009-04-02-0/+1089
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| * s3c24x0: move i2c driver to drivers/i2cJean-Christophe PLAGNIOL-VILLARD2009-03-30-0/+443
| | | | | | | | Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
| * davinci: move i2c driver to drivers/i2cJean-Christophe PLAGNIOL-VILLARD2009-03-30-0/+330
| | | | | | | | Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
| * s3c44b0: move i2c driver to drivers/i2cJean-Christophe PLAGNIOL-VILLARD2009-03-29-0/+316
| | | | | | | | Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
* | soft_i2c.c compiler/linker errorJens Scharsig2009-03-31-5/+1
|/ | | | | | | | | | | | | | | | 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>
* 8xx: add support for new keymile kmsupx4 board.Heiko Schocher2009-03-18-1/+1
| | | | | | | | | | | | | 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>
* 83xx, i2c: add mux support for fsl_i2cHeiko Schocher2009-03-05-1/+21
| | | | | | | | | | 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>
* i.MX31: Start the I2C clock on driver initialisationGuennadi Liakhovetski2009-02-14-0/+6
| | | | | | | | | | | | 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>
* Merge branch 'master' of git://git.denx.de/u-boot-armWolfgang Denk2009-02-01-0/+24
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| * OMAP3: Add I2C supportDirk Behme2009-01-24-0/+24
| | | | | | | | | | | | Add I2C support. Signed-off-by: Dirk Behme <dirk.behme@googlemail.com>
* | Blackfin: overhaul i2c driverMike Frysinger2009-01-28-0/+286
| | | | | | | | | | | | | | | | | | | | | | 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>
* | soft_i2c.c add option for repeated start in i2c_read()Andrew Dyer2009-01-27-1/+11
|/ | | | | | | | | | | | | | | | 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>
* Coding style cleanup, update CHANGELOG.Wolfgang Denk2008-12-16-1/+0
| | | | Signed-off-by: Wolfgang Denk <wd@denx.de>
* i2c: merge all i2c_reg_read() and i2c_reg_write() into inline functionsTimur Tabi2008-12-15-35/+0
| | | | | | | | | | 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>
* Section name should be ".data", not "data"Trent Piepho2008-12-09-5/+4
| | | | | Signed-off-by: Trent Piepho <tpiepho@freescale.com> Signed-off-by: Wolfgang Denk <wd@denx.de>
* ARM: OMAP: Convert IO macrosDirk Behme2008-11-21-67/+64
| | | | | | Convert IO macros to readx/writex. Signed-off-by: Dirk Behme <dirk.behme@gmail.com>
* Cleanup: fix "MHz" spellingWolfgang Denk2008-10-21-2/+2
| | | | Signed-off-by: Wolfgang Denk <wd@denx.de>
* mgsuvd: fix compiler warning when using soft_i2c driverHeiko Schocher2008-10-18-0/+4
| | | | Signed-off-by: Heiko Schocher <hs@denx.de>
* rename CFG_ macros to CONFIG_SYSJean-Christophe PLAGNIOL-VILLARD2008-10-18-38/+38
| | | | Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
* I2C: adding new "i2c bus" Command to the I2C Subsystem.Heiko Schocher2008-10-18-1/+14
| | | | | | | 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>
* soft_i2c: Add CFG_I2C_INIT_BOARD optionHeiko Schocher2008-10-18-0/+11
| | | | | | | This patch adds the option for a boardspecific I2C deblocking mechanism for the soft i2c driver. Signed-off-by: Heiko Schocher <hs@denx.de>
* soft_i2c: prevent compiler warnings if driver does not use CPU Pins.Heiko Schocher2008-10-18-37/+6
| | | | | | | | | | | | | | | | | | | | | 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>
* i2c: add CONFIG_I2C_MULTI_BUS for soft_i2c and mpc8260 i2c driver.Heiko Schocher2008-10-18-0/+36
| | | | Signed-off-by: Heiko Schocher <hs@denx.de>
* Merge branch 'Makefile' of git://git.denx.de/u-boot-armWolfgang Denk2008-09-01-0/+424
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| * soft_i2c: move to drivers/i2cJean-Christophe PLAGNIOL-VILLARD2008-08-29-0/+424
| | | | | | | | Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
* | Add I2C frequency dividers for ColdFireTsiChung Liew2008-08-28-1/+33
|/ | | | | | | | | | 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>
* i2c: Clean drivers/i2c/ MakefileMichal Simek2008-08-18-18/+6
| | | | Signed-off-by: Michal Simek <monstr@monstr.eu>
* Fix merge problemsStefan Roese2008-08-06-7/+11
| | | | Signed-off-by: Stefan Roese <sr@denx.de>
* Big white-space cleanup.Wolfgang Denk2008-05-21-3/+3
| | | | | | | | | | | 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>
* Fix warnings introduced by I2C bus speed setting patchKumar Gala2008-04-13-4/+3
| | | | Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
* add an i2c driver for mx31Sascha Hauer2008-04-13-0/+203
| | | | | | | 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>
* Revert merge of git://www.denx.de/git/u-boot-arm, commit 62479b18:Wolfgang Denk2008-04-11-208/+0
| | | | | | | | | | | | | | | | | | | | | | 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: 066bebd6353e33af3adefc3404560871699e9961 7a837b7310166ae8fc8b8d66d7ef01b60a80f9d6 c88ae20580b2b01487b4cdcc8b2a113f551aee36 a147e56f03871bba4f05058d5e04ce7deb010b04 d6674e0e2a6a1f033945f78838566210d3f28c95 8c8463cce44d849e37744749b32d38e1dfb12e50 c98b47ad24b2d91f41c09a3d62d7f70ad84f4b7d 8bf69d81782619187933a605f1a95ee1d069478d 8c16cb0d3b971f46fbe77c072664c0f2dcd4471d a574a73852a527779234e73e17e7597fd8128882 1377b5583a48021d983e1fd565f7d40c89e84d63 1704dc20917b4f71e373e2c888497ee666d40380 Signed-off-by: Wolfgang Denk <wd@denx.de>
* add an i2c driver for mx31Sascha Hauer2008-03-30-0/+208
| | | | | | | 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>
* Add support for setting the I2C bus speed in fsl_i2c.cTimur Tabi2008-03-27-9/+105
| | | | | | | | | | 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>
* drivers/i2c : move i2c drivers to drivers/i2cJean-Christophe PLAGNIOL-VILLARD2007-11-20-0/+1237
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
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