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Linux for Ingenic SoCs

Kernel Build

Linux kernel source tree with the latest features and modifications to unleash the full potential of Ingenic processors.

Purpose

Adding stuff to upstream is a lengthy and tough job. Maintaining a separate repo can make new features available to people in a timely manner.

Stuff that are broken in the upstream kernel and nobody cared

Last updated: 2023-08-03

Problem Affected Chips Fixed Here
Device to Host DMA operations return garbage data All X series SoCs with a writeback L2 cache ✅
PDMA operations corrupts RAM randomly All X series SoCs ✅
Inaccurate UART baudrate calculation All Ingenic SoCs ✅
Suspend to RAM All X series SoCs ✅
Incorrect I2S MCLK PLL calculation X1000 series SoCs ✅
RTC on 12/24MHz clocksource X1000 series SoCs ✅
Ability to use internal analog codec X1000 series SoCs ✅
SPI HW CS still enabled when using cs-gpios All X series SoCs ✅
dwc2_otg must use PIO mode on X1501 X1501 ✅

Policy

We will always add support for longterm Linux versions, we will also do stable versions when we have time.

Upstream changes will be merged to each branch whenever needed, or every one or two weeks.

We're free to drop support for old longterm kernels if there is already support for a newer version. Same for stable kernels.

This repo is primarily for Ingenic SoCs, but it's not limited to these. We may incorporate other kinds of improvements as well.

Status Matrix

Chip JZ series X1000 series X1600 series X2000 series
Booting ✅ ✅ ❓ ✅
Suspend ✅ ✅ ❓ ❌
SMP ✅ N/A N/A ✅
DMA DMAC✅ PDMA✅ ❓ PDMA✅
USB UHC✅ USBD✅ OTG✅ ❓ ⏳
Ethernet N/A MAC✅ ❓ ❓
SPI Master SSI✅ SSI✅ ❓ SSI✅
SPI Slave N/A N/A ❌ N/A
Quad SPI N/A SFC✅ ❓ SFC✅
I2C I2C✅ SMB✅ ❓ ❓
PWM TCU✅ TCU✅ ❓ TCU✅ PWM❌
ADC ❌ N/A ❌ ❌
SD/MMC MSC✅ MSC✅ ❓ SDHCI✅
I2S AIC✅ AIC✅ ❌ ❌
Analog Codec ✅ ✅ N/A ❌
PDMIC ❌ ❌ N/A ❌
Display LCDC✅ SLCD✅ ❌ ❌
Camera CIM❓ CIM✅ ❌ ❌
CAN N/A N/A ❌ N/A
Parallel i80 bus EMC✅ ❓ ❓ ❓
CDBUS N/A N/A ❌ N/A
Heterogeneous multicore VPU✅ MCU✅ ❓ ❓
Accelerator ❌ ❌ ❌ ❌

Notes

Need help? Have a question? Feel free to open an issue.

You're welcome to push the changes here to upstream if not already done by us, but please retain the original author information.

License information are clearly stated in each file. Please respect them.

FAQ

No support for T series?

Unlike the good old JZ and X series, the T series is in tight control of a subsidiary company of Ingenic in a distant city. And unfortunately they have a very different philosophy of treating customers. You can urge them to release the related datasheets to public by sending emails to [email protected] and [email protected].