Difference between revisions of "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.
+
This page has the status for driver bringup for PS 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 =
 
= Devices =
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|-
 
|-
 
| Framebuffer
 
| Framebuffer
| style="background-color:#ffccc9;" | 0%
+
| style="background-color:#ffeec9;" | 25%
 
| High
 
| High
 
| [[IFTU Registers]]
 
| [[IFTU Registers]]
|  
+
| Uses pre-configured framebuffer by [https://github.com/xerpi/vita-baremetal-linux-loader PS Vita Linux bootloader]
 
|-
 
|-
 
| PMU
 
| PMU
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| Med
 
| Med
 
| [[Pervasive]] [[SN99057]]
 
| [[Pervasive]] [[SN99057]]
|  
+
| Power Management Unit
 
|-
 
|-
 
| GPIO
 
| GPIO
| style="background-color:#ffccc9;" | 0%
+
| style="background-color:#44ff44;" | 100%
| Med
+
| High
 
| [[GPIO Registers]]
 
| [[GPIO Registers]]
| LEDs mostly
+
| LEDs, Syscon, SPI, LCD backlight, etc
 
|-
 
|-
 
| UART
 
| UART
| style="background-color:#ffccc9;" | 0%
+
| style="background-color:#ddffcc;" | 75%
 
| High
 
| High
 
| [[UART Registers]] [[UART Console]]
 
| [[UART Registers]] [[UART Console]]
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| Med
 
| Med
 
| [[I2C Registers]]
 
| [[I2C Registers]]
| PMIC, camera, accelerometer, OLED brightness, clockgen, HDMI control
+
| PMIC, camera, motion (accelerometer IC), OLED brightness, clockgen, HDMI control
 
|-
 
|-
 
| SPI
 
| SPI
| style="background-color:#ffccc9;" | 0%
+
| style="background-color:#ddffcc;" | 75%
 
| Med
 
| Med
 
| [[SPI Registers]]
 
| [[SPI Registers]]
| Syscon, accelerometer, OLED, touch scree?, touchpad?
+
| Syscon, accelerometer, OLED, touchscreen
 +
|-
 +
| Syscon
 +
| style="background-color:#88ffaa;" | 95%
 +
| Med
 +
| [[Syscon]]
 +
| Syscon, accelerometer, touchscreen, buttons, analog sticks, RTC, etc
 +
|-
 +
| Buttons/joysticks
 +
| style="background-color:#44ff44;" | 100%
 +
| Med
 +
| [https://github.com/xerpi/vita-libbaremetal/blob/master/libbaremetal/src/ctrl.c libbaremetal implementation]
 +
|
 +
|-
 +
| Touch
 +
| style="background-color:#44ff44;" | 100%
 +
| Med
 +
| [https://github.com/xerpi/vita-libbaremetal/blob/master/libbaremetal/src/touch.c libbaremetal implementation]
 +
|
 +
|-
 +
| Motion
 +
| style="background-color:#ffccc9;" | 0%
 +
| Low
 +
|
 +
| Accelerometer IC, SPI, some ST chip
 
|-
 
|-
 
| SDIO
 
| SDIO
 
| style="background-color:#ffccc9;" | 0%
 
| style="background-color:#ffccc9;" | 0%
 
| High
 
| High
| [[SceSdif]] [https://www.sdcard.org/developers/overview/host_controller/index.html]
+
| [[SceSdif]] [https://www.sdcard.org/developers/overview/host_controller/index.html Host Controllers spec]
| eMMC, GC, Wifi/BT uses this. Standard SD interface.
+
| eMMC, GC, Wlan/Bt uses this. Standard SD interface.
 
|-
 
|-
 
| MSIF
 
| MSIF
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| Med
 
| Med
 
|  
 
|  
| Marvell 88W878S-BKB2, SDIO interface
+
| [[Marvell_88W878S-BKB2|Marvell 88W878S-BKB2]], SDIO interface
 
|-
 
|-
 
| eMMC
 
| eMMC
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| Med
 
| Med
 
| [[Game Card]]
 
| [[Game Card]]
| SDIO interface, extra auth (can be disabled and use sd2vita)
+
| SDIO interface, extra authentication (can be disabled and use GC2SD)
 
|-
 
|-
 
| Memory Card
 
| Memory Card
 
| style="background-color:#ffccc9;" | 0%
 
| style="background-color:#ffccc9;" | 0%
 
| Low
 
| Low
| [[Memory Card]]
+
| [[Memory Card]] [https://github.com/xerpi/vita-libbaremetal/blob/master/libbaremetal/src/msif.c libbaremetal implementation]
| MSIF interface, extra auth
+
| MSIF interface, extra authentication
 
|-
 
|-
 
| GPU
 
| GPU
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| Low
 
| Low
 
| [[UDC]] [[SceUdcd]]
 
| [[UDC]] [[SceUdcd]]
| Connecting to host PC
+
| USB Device Controller. Connecting to host PC or USB OTG.
 +
|-
 +
| RTC
 +
| style="background-color:#ddffcc;" | 75%
 +
| Med
 +
| [[SceRtc]]
 +
| Time and date. RTC read support implemented. Missing RTC write support.
 
|-
 
|-
 
| PSP
 
| PSP
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| [[Venezia]]
 
| [[Venezia]]
 
| Toshiba MeP based
 
| Toshiba MeP based
 +
|-
 +
| SDBG SDIO
 +
| style="background-color:#44ff44;" | 100%
 +
| Extra
 +
| [https://github.com/Princess-of-Sleeping/PSP2Modules/tree/master/SceSDbgSdio SceSDbgSdio (Github)]
 +
| Secure Debug Storage Device Input/Output. DevKit mini-USB between CP and PC.
 
|}
 
|}
 +
 +
= 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/Bt, motion, touch, etc) so we may get them "for free".
 +
 +
For power management, we need sleep/resume first. It would be great if we could use the dynamic clocking features to save battery but that is low priority. Battery fuel gauge is through a standard chip over I2C interface.
 +
 +
Framebuffer might be the hardest. It 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.
 +
  
 
[[Category:Linux]]
 
[[Category:Linux]]
 
[[Category:Devices]]
 
[[Category:Devices]]

Latest revision as of 13:45, 8 January 2022

This page has the status for driver bringup for PS 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 25% High IFTU Registers Uses pre-configured framebuffer by PS Vita Linux bootloader
PMU 0% Med Pervasive SN99057 Power Management Unit
GPIO 100% High GPIO Registers LEDs, Syscon, SPI, LCD backlight, etc
UART 75% 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, motion (accelerometer IC), OLED brightness, clockgen, HDMI control
SPI 75% Med SPI Registers Syscon, accelerometer, OLED, touchscreen
Syscon 95% Med Syscon Syscon, accelerometer, touchscreen, buttons, analog sticks, RTC, etc
Buttons/joysticks 100% Med libbaremetal implementation
Touch 100% Med libbaremetal implementation
Motion 0% Low Accelerometer IC, SPI, some ST chip
SDIO 0% High SceSdif Host Controllers spec eMMC, GC, Wlan/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 authentication (can be disabled and use GC2SD)
Memory Card 0% Low Memory Card libbaremetal implementation MSIF interface, extra authentication
GPU 0% Med GPU SGX543MP4+
USB 0% Med EHCI Ethernet, Audio codec, accessories
UDC 0% Low UDC SceUdcd USB Device Controller. Connecting to host PC or USB OTG.
RTC 75% Med SceRtc Time and date. RTC read support implemented. Missing RTC write support.
PSP 0% Extra PSP Emulator Custom MIPS
Codec 0% Extra Venezia Toshiba MeP based
SDBG SDIO 100% Extra SceSDbgSdio (Github) Secure Debug Storage Device Input/Output. DevKit mini-USB between CP and PC.

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/Bt, motion, touch, etc) so we may get them "for free".

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

Framebuffer might be the hardest. It 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.