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Diffstat (limited to 'Documentation/i2c/busses/i2c-parport')
| -rw-r--r-- | Documentation/i2c/busses/i2c-parport | 178 |
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diff --git a/Documentation/i2c/busses/i2c-parport b/Documentation/i2c/busses/i2c-parport deleted file mode 100644 index c3dbb3bfd814..000000000000 --- a/Documentation/i2c/busses/i2c-parport +++ /dev/null @@ -1,178 +0,0 @@ -Kernel driver i2c-parport - -Author: Jean Delvare <jdelvare@suse.de> - -This is a unified driver for several i2c-over-parallel-port adapters, -such as the ones made by Philips, Velleman or ELV. This driver is -meant as a replacement for the older, individual drivers: - * i2c-philips-par - * i2c-elv - * i2c-velleman - * video/i2c-parport (NOT the same as this one, dedicated to home brew - teletext adapters) - -It currently supports the following devices: - * (type=0) Philips adapter - * (type=1) home brew teletext adapter - * (type=2) Velleman K8000 adapter - * (type=3) ELV adapter - * (type=4) Analog Devices ADM1032 evaluation board - * (type=5) Analog Devices evaluation boards: ADM1025, ADM1030, ADM1031 - * (type=6) Barco LPT->DVI (K5800236) adapter - * (type=7) One For All JP1 parallel port adapter - * (type=8) VCT-jig - -These devices use different pinout configurations, so you have to tell -the driver what you have, using the type module parameter. There is no -way to autodetect the devices. Support for different pinout configurations -can be easily added when needed. - -Earlier kernels defaulted to type=0 (Philips). But now, if the type -parameter is missing, the driver will simply fail to initialize. - -SMBus alert support is available on adapters which have this line properly -connected to the parallel port's interrupt pin. - - -Building your own adapter -------------------------- - -If you want to build you own i2c-over-parallel-port adapter, here is -a sample electronics schema (credits go to Sylvain Munaut): - -Device PC -Side ___________________Vdd (+) Side - | | | - --- --- --- - | | | | | | - |R| |R| |R| - | | | | | | - --- --- --- - | | | - | | /| | -SCL ----------x--------o |-----------x------------------- pin 2 - | \| | | - | | | - | |\ | | -SDA ----------x----x---| o---x--------------------------- pin 13 - | |/ | - | | - | /| | - ---------o |----------------x-------------- pin 3 - \| | | - | | - --- --- - | | | | - |R| |R| - | | | | - --- --- - | | - ### ### - GND GND - -Remarks: - - This is the exact pinout and electronics used on the Analog Devices - evaluation boards. - /| - - All inverters -o |- must be 74HC05, they must be open collector output. - \| - - All resitors are 10k. - - Pins 18-25 of the parallel port connected to GND. - - Pins 4-9 (D2-D7) could be used as VDD is the driver drives them high. - The ADM1032 evaluation board uses D4-D7. Beware that the amount of - current you can draw from the parallel port is limited. Also note that - all connected lines MUST BE driven at the same state, else you'll short - circuit the output buffers! So plugging the I2C adapter after loading - the i2c-parport module might be a good safety since data line state - prior to init may be unknown. - - This is 5V! - - Obviously you cannot read SCL (so it's not really standard-compliant). - Pretty easy to add, just copy the SDA part and use another input pin. - That would give (ELV compatible pinout): - - -Device PC -Side ______________________________Vdd (+) Side - | | | | - --- --- --- --- - | | | | | | | | - |R| |R| |R| |R| - | | | | | | | | - --- --- --- --- - | | | | - | | |\ | | -SCL ----------x--------x--| o---x------------------------ pin 15 - | | |/ | - | | | - | | /| | - | ---o |-------------x-------------- pin 2 - | \| | | - | | | - | | | - | |\ | | -SDA ---------------x---x--| o--------x------------------- pin 10 - | |/ | - | | - | /| | - ---o |------------------x--------- pin 3 - \| | | - | | - --- --- - | | | | - |R| |R| - | | | | - --- --- - | | - ### ### - GND GND - - -If possible, you should use the same pinout configuration as existing -adapters do, so you won't even have to change the code. - - -Similar (but different) drivers -------------------------------- - -This driver is NOT the same as the i2c-pport driver found in the i2c -package. The i2c-pport driver makes use of modern parallel port features so -that you don't need additional electronics. It has other restrictions -however, and was not ported to Linux 2.6 (yet). - -This driver is also NOT the same as the i2c-pcf-epp driver found in the -lm_sensors package. The i2c-pcf-epp driver doesn't use the parallel port as -an I2C bus directly. Instead, it uses it to control an external I2C bus -master. That driver was not ported to Linux 2.6 (yet) either. - - -Legacy documentation for Velleman adapter ------------------------------------------ - -Useful links: -Velleman http://www.velleman.be/ -Velleman K8000 Howto http://howto.htlw16.ac.at/k8000-howto.html - -The project has lead to new libs for the Velleman K8000 and K8005: - LIBK8000 v1.99.1 and LIBK8005 v0.21 -With these libs, you can control the K8000 interface card and the K8005 -stepper motor card with the simple commands which are in the original -Velleman software, like SetIOchannel, ReadADchannel, SendStepCCWFull and -many more, using /dev/velleman. - http://home.wanadoo.nl/hihihi/libk8000.htm - http://home.wanadoo.nl/hihihi/libk8005.htm - http://struyve.mine.nu:8080/index.php?block=k8000 - http://sourceforge.net/projects/libk8005/ - - -One For All JP1 parallel port adapter -------------------------------------- - -The JP1 project revolves around a set of remote controls which expose -the I2C bus their internal configuration EEPROM lives on via a 6 pin -jumper in the battery compartment. More details can be found at: - -http://www.hifi-remote.com/jp1/ - -Details of the simple parallel port hardware can be found at: - -http://www.hifi-remote.com/jp1/hardware.shtml |