Driver and platform support

This page has the status for driver bringup for 3DS 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.

Platform

Name	Status	Priority	Links	Notes
MPCore	100%	High	TRM	Supported by Linux
GIC	100%	High		Supported by Linux
SMP	100%	High	Description	Supports all CPUs, dual core on old3DS and quad core on new3DS models
Extra FCRAM	100%	High		Only for new3DS
CPU reclocking	0%	High	Issue	Only for new3DS
Power management	~5%	Med	Registers	Some drivers support power management already but most don't, and we need platform-specific sleep modes
ARM9	50%	High	arm9linuxfw	Fully supported from Linux through VirtIO, it just needs a better firmware on the ARM9 side
PL-330	90%	High		Supported by Linux, needs more support on new3DS

Devices

Name	Status	Priority	Links	Notes
SPI	100%	High	Registers	Doesn't support the autopolled modes since Linux has no concept of such thing
I2C	100%	High	Registers
GPIO	100%	High	Registers	Needs very special handling for interrupts
SDHC	~80%	Med	Reference	There's a basic implementation but it doesn't support the 32bit FIFO
Wireless	0%	Med	Wifiboot	Needs more research into the AR6002 and how it can be brought back into the mainline kernel (it was removed when the ath6kl driver was moved off staging?)
GPU	0%	Med	Baremetal implementation	Includes the display controller, command processor and DMA transfer unit
Backlight	0%	Med	Registers
CSND	0%	Med	Baremetal implementation	Needs codec first, and this is only a simple multichannel output pipe
DSP	0%	Extra	Info Registers	Same as the DSP in the DSi, there hasn't been much RE done on it yet?
Camera	0%	Extra		Not much info out there
Y2R	0%	Extra		Color conversion hardware? Used by the camera
MVD	0%	Extra		H264 hardware acceleration chip, only on new3DS
MIC	0%	Low	Registers	Microphone capture

SPI subdevices:

Name	Status	Priority	Links	Notes
spi-nor	75%	Low		It's a regular chip that should be supported by the spi-nor driver but it has a custom ID that's not recognized
touch	100%	Med		Touschreen/circlepad controller in CODEC
codec	0%	Med	Baremetal implementation	Sound controller in CODEC

I2C subdevices:

Name	Status	Priority	Links	Notes
IRQ Chip	100%	High	Info
Fuel gauge	100%	Med	Info	Supports retrieving the battery voltage, temperature, capacity and the status of the AC charger (connected or not)
RTC	100%	Med	Info	Supports both reading and writing the raw time
Accelerometer	100%	Low	Info	The LIS331DLH is already supported in Linux but the 3DS exposes a different interface to it
Gyroscope	50%	Low	ITG-3200 ITG-1010	The kernel fully supports the ITG-3200, but it needs a new driver for the ITG-1010
Infrared	90%	Low	Info	The SC16IS750 is already supported and seems to work in Linux, but the IR LED itself is never lit up when transferring data, needs more research
LEDs	90%	Low	Info	Only supports controlling the notification LED, the rest are not that important?
Regulators	95%	High	Info	Supports toggling regulators on and off but it waits for a fixed amount of time rather than for an interrupt

Roadmap

???

("inspired" by https://wiki.henkaku.xyz/vita/Linux_Driver_Status)