Difference between revisions of "TSC2102 Linux driver"
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insmod /lib/modules/drivers/spi/tsc2102.ko | insmod /lib/modules/drivers/spi/tsc2102.ko | ||
insmod /lib/modules/drivers/input/touchscreen/tsc2102_ts.ko | insmod /lib/modules/drivers/input/touchscreen/tsc2102_ts.ko | ||
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Revision as of 22:22, 22 October 2008
This page details the installation and the usage of the Linux drivers for the TSC2102 touchscreen & sound chip. Sound (ALSA) specific part can be found here.
Contents
Driver Installation
$ make linux-menuconfig
in Device Drivers ---> Input device support ---> select <*> Event interface as builtin in Device Drivers ---> Input device support ---> [*] Touchscreens ---> select <M> TSC 2102 based touchscreens as module in Device Drivers ---> SPI support ---> select <M> Freescale iMX SPI controller as module in Device Drivers ---> SPI support ---> --- TSC2102 codec support should be selected in Device Drivers ---> select <M> Hardware Monitoring support ---> as module
$ make linux
Then reflash your Linux kernel and your Rootfs...
Architecture
Touchscreen (tsc2102_ts.ko) | HWmon | ALSA |
---|---|---|
TSC2102 Main driver (tsc2102.ko) | ||
Linux API |
Usage
- load all the needed drivers:
insmod /lib/modules/drivers/hwmon/hwmon.ko insmod /lib/modules/drivers/spi/spi_imx.ko insmod /lib/modules/drivers/spi/tsc2102.ko insmod /lib/modules/drivers/input/touchscreen/tsc2102_ts.ko
Then:
- get temperature and voltage with hwmon (Hardware Monitoring) interface
# cat /sys/class/hwmon/hwmon0/device/temp1_input -- result in m°C
- play sounds through ALSA interface
TSLib API Installation
Install the Tslib touchscreen API
Envt variables
- You should define some ENVT variables to use the touchscreen API (tslib):
export TSLIB_TSDEVICE=/dev/input/event0 export TSLIB_TSEVENTTYPE=INPUT export TSLIB_CONFFILE=/etc/ts.conf export TSLIB_CALIBFILE=/etc/pointercal
- you can add them to your /etc/profile:
# vi /etc/profile
Device file creation if not exist
- /dev/input/event0 is created from the infos got from:
# cat /sys/class/input/event0/dev 13:64 # mkdir /dev/input # cd /dev/input/ # mknod event0 c 13 64 # ls -al drwxr-xr-x 2 root root 0 Jan 1 00:39 . drwxr-xr-x 5 root root 0 Jan 1 00:39 .. crw-r--r-- 1 root root 13, 64 Jan 1 00:39 event0 #
Quick test
To quickly check driver fonctionnality, touch the screen and check that tsc2102 interrupts count is increasing:
# cat /proc/interrupts CPU0 26: 0 MPU IMX-uart 29: 17 MPU IMX-uart 30: 22 MPU IMX-uart 35: 12 MPU imx-mmc 39: 14 MPU I2C_IMX 40: 16 MPU imx-spi.2 41: 0 MPU imx-spi.1 59: 3682 MPU i.MX Timer Tick 60: 0 MPU DMA 61: 0 MPU DMA 110: 0 GPIO eth0 168: 0 GPIO tsc2102 Err: 0 #
or start the touchscreen calibration tool:
/usr/bin/ts_calibrate
Links
- http://source.mvista.com/git/gitweb.cgi?p=linux-omap-2.6.git;a=log;t=7 (search for TSC2102)
- http://osdir.com/ml/linux.ports.arm.omap/2006-08/msg00183.html
- Touchscreen usage on Blackfin
- Compiling TSlib
- http://www.opentom.org/Tslib
- http://www.openembedded.org/filebrowser/org.openembedded.packaged-staging/packages/tslib