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[90.63.244.31]) by smtp.googlemail.com with ESMTPSA id o23-20020a05600c379700b003fae92e7a8dsm7657539wmr.27.2023.06.28.06.38.37 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 28 Jun 2023 06:38:37 -0700 (PDT) From: Corentin Labbe To: gregkh@linuxfoundation.org, johan@kernel.org Cc: linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, david@ixit.cz, Corentin Labbe Subject: [PATCH v6 0/2] usb: serial: add support for CH348 Date: Wed, 28 Jun 2023 13:38:32 +0000 Message-Id: <20230628133834.1527941-1-clabbe@baylibre.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org 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@baylibre.com/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