Camera

Description

Palm Pre use the STMicroelectronics VX6852 camera. The VX6852 is a QXGA EDOF camera module.

The STMicroelectronics Camera modules are in this page but link for VX6852 is broken. You can find information about this camera here or on this website: The PDF datasheet for STMicroelectronics VX6852 camera is at this URL.

Features

• 3.15 megapixel resolution sensor (2048 x 1536)
• Extended Depth of Field (EDOF)
• High quality lens
• Compact size: 6.5 mm x 6.5 mm x 4.6 mm
• Fully SMIA 1.0 profile 0 compliant
• Video data interface - CCP2.0
• Command interface - CCI
• Analog power supply from 2.4 V to 2.9 V
• Digital power supply from 1.7 V to 1.9 V
• On-board 10 bit ADC
• Integral EMC shielding and EMI reduction techniques
• Ultra low power standby mode
• Analog Binning (2x2) for higher image quality in video mode
• RoHS (lead-free) package

Configuration files and drivers

Files for VX6852 support are in these folders :

root@palm-webos-device:/etc/camd# ls -l /etc/camd/
-rwxr-xr-x    1 root     root          357 Mar 13 09:18 smia_ed.cfg
-rwxr-xr-x    1 root     root         4567 Mar 13 09:18 vx6852-load-firmware
-rwxr-xr-x    1 root     root           66 Mar 13 09:18 vx6852-once-0.00.bin
-rwxr-xr-x    1 root     root         1610 Mar 13 09:18 vx6852-once-0.10.bin
-rwxr-xr-x    1 root     root         1188 Mar 13 09:18 vx6852-once-1.20.bin
-rwxr-xr-x    1 root     root         3618 Mar 13 09:18 vx6852-once-2.21.bin

root@palm-webos-device:/etc/camd# ls -l /lib/firmware/
-rw-r--r--    1 root     root         2516 Mar 13 09:18 helper_sd.bin
-rw-r--r--    1 root     root        95412 Mar 13 09:18 mfg_sd8686.bin
-rw-r--r--    1 root     root       124136 Mar 13 09:18 sd8686.bin
-rw-r--r--    1 root     root       109316 Mar 13 09:18 sd8686_ap.bin
lrwxrwxrwx    1 root     root           24 May 27 22:27 vx6852-once.bin -> /var/tmp/vx6852-once.bin

root@palm-webos-device:/# find / -name *6852*
/etc/event.d/vx6852
/etc/camd/vx6852-load-firmware
/etc/camd/vx6852-once-0.10.bin
/etc/camd/vx6852-once-1.20.bin
/etc/camd/vx6852-once-0.00.bin
/etc/camd/vx6852-once-2.21.bin
/tmp/vx6852.loaded
/sys/bus/i2c/drivers/vx6852
/lib/firmware/vx6852-once.bin

vx6852 support (driver) in Linux Operating System

As we can see in the text configuration file /etc/camd/vx6852-load-firmware ,
vx6852 use I2C protocol.
At http://en.wikipedia.org/wiki/I%C2%B2C#Operating_system_support,
the wiki page said : "In Linux, I²C is handled with a device driver for the specific device, and another for the I²C (or SMBus) adapter to which it's connected. Several hundred such drivers are part of current releases."