Hello Johan,
Any chance to get CH348 into 6.5?
I want to highlight that from all serials I have around this is the only
one which support 1500000 baud (needed for Rockchip devices).
Thank you!
David
On 28/06/2023 15:38, Corentin Labbe wrote:
Hello
The CH348 is an octo serial to USB adapter.
The following patch adds a driver for supporting it.
Since there is no public datasheet, unfortunatly it remains some magic values.
It was tested with a large range of baud from 1200 to 1500000 and used with
success in one of our kernel CI testlab.
Regards
Changes since v1:
- use a data structure for encoding/decoding messages.
- check if needed endpoints exists
- fix URB leak in ch348_allocate_status_read error case
- test for maximum baud rate as stated by datasheet
Changes since v2:
- specify ch348_rxbuf data length
- Use correct speed_t dwDTERate instead of __le32
- test for maximum baud rate supported according to datasheet
- Use a define for CH348_TX_HDRSIZE
Changes since v3
- Fixed all reported problem from https://lore.kernel.org/lkml/Y5NDwEakGJbmB6+b@Red/T/#mb6234d0427cfdabf412190565e215995a41482dd
Mostly reworked the endpoint mux to be the same than mx_uport
Changes since v4:
- The V4 was sent against stable and next have ch348_set_termios ktermios
parameter const that I forgot to change
Changes since v5:
- Fixed all reported problem from https://lore.kernel.org/lkml/20230106135338.643951-1-clabbe@xxxxxxxxxxxx/T/#m044aab24dfb652ea34aa06f8ef704da9d6a2e036
- Major change is dropping of all status handling which was unused.
It will be probably necessary to bring it back when using GPIO.
This will be done when I will finish my next devboard.
Corentin Labbe (2):
usb: serial: add support for CH348
usb: serial: add myself as maintainer of CH348
MAINTAINERS | 5 +
drivers/usb/serial/Kconfig | 9 +
drivers/usb/serial/Makefile | 1 +
drivers/usb/serial/ch348.c | 491 ++++++++++++++++++++++++++++++++++++
4 files changed, 506 insertions(+)
create mode 100644 drivers/usb/serial/ch348.c
--
David Heidelberg
Certified Linux Magician
