Linux Driver Status

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This page has the status for driver bringup for Vita Linux and is a good place to start with for people who want to contribute. The priority is determined as follows: high - required for a usable environment, med - required to be livable on it, low - not needed but would be nice to have, extra - not needed at all but bonus points for anyone who gets it working.

Devices

Device Status Priority Links Notes
Framebuffer 0% High IFTU Registers
PMU 0% Med Pervasive SN99057
GPIO 0% Med GPIO Registers LEDs mostly
UART 50% High UART Registers UART Console Console, debugging
DSI 0% High DSI Registers Display interface
CSI 0% Low CSI Registers Camera interface
I2S 0% Med I2S Registers Audio
I2C 0% Med I2C Registers PMIC, camera, accelerometer, OLED brightness, clockgen, HDMI control
SPI 0% Med SPI Registers Syscon, accelerometer, OLED, touch scree?, touchpad?
Touch 0% Med SPI
Motion 0% Low SPI, some ST chip
SDIO 0% High SceSdif [1] eMMC, GC, Wifi/BT uses this. Standard SD interface.
MSIF 0% Low MSIF Registers SceMsif SceSblSsMgr MemoryStick
WLAN/BT 0% Med Marvell 88W878S-BKB2, SDIO interface
eMMC 0% High SDIO interface, standard chip
Gamecard 0% Med Game Card SDIO interface, extra auth (can be disabled and use sd2vita)
Memory Card 0% Low Memory Card MSIF interface, extra auth
GPU 0% Med GPU SGX543MP4+
USB 0% Med EHCI Ethernet, Audio codec, accessories
UDC 0% Low UDC SceUdcd Connecting to host PC
PSP 0% Extra PSP Emulator Custom MIPS
Codec 0% Extra Venezia Toshiba MeP based

Plan

Start with the low level interfaces (SPI, I2C, etc). Those are relatively simple. Some might even have standard controller interface (like SDIO). The hardest is probably USB (unless the interface is standard). Then you can implement the devices on top of the interfaces. A lot of the devices seem to use standard chips (WLAN, motion, touch, etc) so we may get them "for free".

For power management, we need sleep/resume first. Would be great is we can use the dynamic clocking features to save battery but that's low priority. Battery fuel gauge is through a standard chip over I2C interface.

Framebuffer might be the hardest. Seems to be a custom interface. If we can find any open source device that uses a similar controller, it would make things a lot easier.