[PATCH v3 0/8] usb: dwc2: Refactor and update USB DWC2 driver

[Mattijs Korpershoek]

Hi Junhui,

On sam., janv. 04, 2025 at 11:37, Junhui Liu <junhui.liu at pigmoral.tech> wrote:

> This series improves the USB DWC2 driver by extracting register
> definitions into a common file for better readability and updating the
> reset method to reflect changes in version 4.20a, including the new
> GRSTCTL_CSFTRST_DONE bit for reset completion indication.
>
> This series has been tested on two platforms:
> - MK808 with RK3066 SoC and dwc2 v2.91a, tested with USB flash drive and
>   connected the board to the PC through the rockusb command. Test log [1].
> - K230-CanMV with K230 SoC [2] and dwc2 v4.30a, tested with the onboard
>   rtl8152 USB to net chip and an external rtl8152 adapter connected to
>   the onboard USB-C interface via USB hub. Test log [3].
>
> [1] https://gist.github.com/Judehahh/878ace2607d201dc49211f2c655f0fe0#file-mk808-md
> [2] https://developer.canaan-creative.com/k230/en/dev/CanMV_K230_Tutorial.html
> [3] https://gist.github.com/Judehahh/878ace2607d201dc49211f2c655f0fe0#file-k230-canmv-md

When applying this series on top of master (commit 6d41f0a39d64 ("Prepare v2025.01"))
And building with khadas-vim3_android_ab_defconfig, I see:

drivers/usb/gadget/dwc2_udc_otg.c:1209:33: error: invalid use of undefined type 'struct dwc2_core_reg'
 1209 |         return readl(&usbotg_reg->global_regs.gotgctl) & GOTGCTL_BSESVLD;
      |                                 ^~

Full build logs:
https://paste.debian.net/1343304/

It seems that at some places, we use:
    struct dwc2_core_reg

instead of:
    struct dwc2_core_regs

Could that be fixed for v4, please?

I think this typo is in "usb: dwc2: Align macros with Linux kernel
definitions" but missed it during review, sorry.

>
> ---
> Changes in v3:
> - Handled warnings from checkpatch.pl (add spaces around '<<' and
>   replace 'x' with '(x)' for macro argument).
> - Add return ret; when timeout happens.
> - Link to v2: https://lore.kernel.org/r/20241230-dwc2-dev-v2-3-12cd9b8a2358@outlook.com
>
> Changes in v2:
> - Reorganized structures, renamed macros, and moved code for better
>   clarity and maintainability.
> - Added a fix for the incorrect ULPI_UTMI_SEL bit setting.
> - Added a fix for incorrectly calculating HBstLen for external DMA mode.
> - Extend the changes that replace uint32 with u32 to also include u8 and
>   u16.
> - Link to v1: https://lore.kernel.org/r/20240522142311.17351-1-seashell11234455@gmail.com
>
> ---
> Junhui Liu (1):
>       usb: dwc2: Fix incorrect ULPI_UTMI_SEL bit setting
>
> Kongyang Liu (7):
>       usb: dwc2: Extract register definitions to common header file
>       USB: dwc2: Fix HBstLen setting for external DMA mode
>       usb: dwc2: Clean up with bitfield macros
>       usb: dwc2: Align macros with Linux kernel definitions
>       usb: dwc2: Extract macro definitions to common header
>       usb: dwc2: Unify flush and reset logic with v4.20a support
>       usb: dwc2: Replace uint<x>_t types with u<x>
>
>  drivers/usb/common/Makefile                |   2 +
>  drivers/usb/common/dwc2_core.c             | 115 +++++
>  drivers/usb/common/dwc2_core.h             | 560 +++++++++++++++++++++
>  drivers/usb/gadget/dwc2_udc_otg.c          | 125 ++---
>  drivers/usb/gadget/dwc2_udc_otg_regs.h     | 293 ++---------
>  drivers/usb/gadget/dwc2_udc_otg_xfer_dma.c | 306 ++++++------
>  drivers/usb/host/dwc2.c                    | 494 ++++++++-----------
>  drivers/usb/host/dwc2.h                    | 750 +----------------------------
>  8 files changed, 1137 insertions(+), 1508 deletions(-)
> ---
> base-commit: e7713a78829250b925d6377ee26c7b0745727feb
> change-id: 20241218-dwc2-dev-955c21a81118
>
> Best regards,
> -- 
> Junhui Liu <junhui.liu at pigmoral.tech>