Skip to content

Ch342 driver ci #65

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
Rehan-Zola wants to merge 2 commits into
base: develop2
Choose a base branch
from
Open

Ch342 driver ci #65

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
b04457c
Add driver support for CH342y
Rehan-Zola Mar 6, 2026
3a21a61
Updating version to 2.27.2+zola-12l
Rehan-Zola Mar 6, 2026
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
2 changes: 1 addition & 1 deletion VERSION
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -1 +1 @@
2.27.2+zola-12
2.27.2+zola-12l
109 changes: 106 additions & 3 deletions linux/0003-ch348-usb-serial.patch
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -19,10 +19,19 @@ diff --git a/drivers/usb/serial/Kconfig b/drivers/usb/serial/Kconfig
index 169251ec8353..1e01a3728a90 100644
--- a/drivers/usb/serial/Kconfig
+++ b/drivers/usb/serial/Kconfig
@@ -112,6 +112,15 @@ config USB_SERIAL_CH341
@@ -112,6 +112,24 @@ config USB_SERIAL_CH341
To compile this driver as a module, choose M here: the
module will be called ch341.

+config USB_SERIAL_CH342
+ tristate "USB Winchiphead CH342 Serial Driver"
+ help
+ Say Y here if you want to use a Winchiphead CH342
+ USB to serial adapter.
+
+ To compile this driver as a module, choose M here: the
+ module will be called ch348.
+
+config USB_SERIAL_CH348
+ tristate "USB Winchiphead CH348 Octo Port Serial Driver"
+ help
Expand All @@ -39,10 +48,11 @@ diff --git a/drivers/usb/serial/Makefile b/drivers/usb/serial/Makefile
index 2d491e434f11..6f2fdf4e4f78 100644
--- a/drivers/usb/serial/Makefile
+++ b/drivers/usb/serial/Makefile
@@ -15,6 +15,7 @@ obj-$(CONFIG_USB_SERIAL_AIRCABLE) += aircable.o
@@ -15,6 +15,8 @@ obj-$(CONFIG_USB_SERIAL_AIRCABLE) += aircable.o
obj-$(CONFIG_USB_SERIAL_ARK3116) += ark3116.o
obj-$(CONFIG_USB_SERIAL_BELKIN) += belkin_sa.o
obj-$(CONFIG_USB_SERIAL_CH341) += ch341.o
+obj-$(CONFIG_USB_SERIAL_CH342) += ch348.o
+obj-$(CONFIG_USB_SERIAL_CH348) += ch348.o
obj-$(CONFIG_USB_SERIAL_CP210X) += cp210x.o
obj-$(CONFIG_USB_SERIAL_CYBERJACK) += cyberjack.o
Expand Down Expand Up @@ -344,9 +354,18 @@ index 000000000000..66488a72adf2
+{
+ struct usb_serial_port *port = urb->context;
+ struct ch348 *ch348 = usb_get_serial_data(port->serial);
+ bool is_ch342 = (le16_to_cpu(port->serial->dev->descriptor.idVendor) == 0x1a86 &&
+ (le16_to_cpu(port->serial->dev->descriptor.idProduct) == 0x5524 ||
+ le16_to_cpu(port->serial->dev->descriptor.idProduct) == 0x7523));
+ unsigned int portnum, usblen, i;
+ struct ch348_rxbuf *rxb;
+
+ /* CH342 uses generic read processing */
+ if (is_ch342) {
+ usb_serial_generic_process_read_urb(urb);
+ return;
+ }
+
+ if (urb->actual_length < 2) {
+ dev_dbg(&ch348->udev->dev, "Empty rx buffer\n");
+ return;
Expand Down Expand Up @@ -378,9 +397,17 @@ index 000000000000..66488a72adf2
+
+static int ch348_prepare_write_buffer(struct usb_serial_port *port, void *dest, size_t size)
+{
+ bool is_ch342 = (le16_to_cpu(port->serial->dev->descriptor.idVendor) == 0x1a86 &&
+ (le16_to_cpu(port->serial->dev->descriptor.idProduct) == 0x5524 ||
+ le16_to_cpu(port->serial->dev->descriptor.idProduct) == 0x7523));
+ struct ch348_txbuf *rxt = dest;
+ int count;
+
+ /* CH342 uses generic write buffer preparation */
+ if (is_ch342) {
+ return usb_serial_generic_prepare_write_buffer(port, dest, size);
+ }
+
+ count = kfifo_out_locked(&port->write_fifo, rxt->data,
+ size - CH348_TX_HDRSIZE, &port->lock);
+
Expand All @@ -394,6 +421,15 @@ index 000000000000..66488a72adf2
+ const unsigned char *buf, int count)
+{
+ struct ch348 *ch348 = usb_get_serial_data(port->serial);
+ bool is_ch342 = (le16_to_cpu(port->serial->dev->descriptor.idVendor) == 0x1a86 &&
+ (le16_to_cpu(port->serial->dev->descriptor.idProduct) == 0x5524 ||
+ le16_to_cpu(port->serial->dev->descriptor.idProduct) == 0x7523));
+
+ /* CH342 uses generic write */
+ if (is_ch342) {
+ return usb_serial_generic_write(tty, port, buf, count);
+ }
+
+ struct ch348_port *ch348_port = &ch348->ports[port->port_number];
+ int ret, max_tx_size;
+
Expand Down Expand Up @@ -466,7 +502,16 @@ index 000000000000..66488a72adf2
+ struct ktermios *termios_old)
+{
+ struct ch348 *ch348 = usb_get_serial_data(port->serial);
+ bool is_ch342 = (le16_to_cpu(port->serial->dev->descriptor.idVendor) == 0x1a86 &&
+ (le16_to_cpu(port->serial->dev->descriptor.idProduct) == 0x5524 ||
+ le16_to_cpu(port->serial->dev->descriptor.idProduct) == 0x7523));
+ struct ktermios *termios = &tty->termios;
+
+ /* CH342 uses generic termios handling */
+ if (is_ch342) {
+ usb_serial_generic_set_termios(tty, port, termios_old);
+ return;
+ }
+ int ret, portnum = port->port_number;
+ struct ch348_initbuf *buffer;
+ speed_t baudrate;
Expand Down Expand Up @@ -552,8 +597,16 @@ index 000000000000..66488a72adf2
+static int ch348_open(struct tty_struct *tty, struct usb_serial_port *port)
+{
+ struct ch348 *ch348 = usb_get_serial_data(port->serial);
+ bool is_ch342 = (le16_to_cpu(port->serial->dev->descriptor.idVendor) == 0x1a86 &&
+ (le16_to_cpu(port->serial->dev->descriptor.idProduct) == 0x5524 ||
+ le16_to_cpu(port->serial->dev->descriptor.idProduct) == 0x7523));
+ int ret;
+
+ /* CH342 uses generic handling */
+ if (is_ch342) {
+ return usb_serial_generic_open(tty, port);
+ }
+
+ if (tty)
+ ch348_set_termios(tty, port, NULL);
+
Expand All @@ -574,6 +627,15 @@ index 000000000000..66488a72adf2
+ int status_buffer_size, i, ret;
+ struct usb_interface *intf;
+ struct ch348 *ch348;
+ bool is_ch342 = (le16_to_cpu(serial->dev->descriptor.idVendor) == 0x1a86 &&
+ (le16_to_cpu(serial->dev->descriptor.idProduct) == 0x5524 ||
+ le16_to_cpu(serial->dev->descriptor.idProduct) == 0x7523));
+
+ /* CH342 is a simpler single-port device, use generic handling */
+ if (is_ch342) {
+ port0 = serial->port[0];
+ return usb_serial_generic_submit_read_urbs(port0, GFP_KERNEL);
+ }
+
+ intf = usb_ifnum_to_if(usb_dev, 0);
+ epstatus = &intf->cur_altsetting->endpoint[2].desc;
Expand Down Expand Up @@ -634,6 +696,13 @@ index 000000000000..66488a72adf2
+static void ch348_release(struct usb_serial *serial)
+{
+ struct ch348 *ch348 = usb_get_serial_data(serial);
+ bool is_ch342 = (le16_to_cpu(serial->dev->descriptor.idVendor) == 0x1a86 &&
+ (le16_to_cpu(serial->dev->descriptor.idProduct) == 0x5524 ||
+ le16_to_cpu(serial->dev->descriptor.idProduct) == 0x7523));
+
+ /* CH342 doesn't allocate ch348 structure */
+ if (is_ch342)
+ return;
+
+ usb_kill_urb(ch348->status_urb);
+ usb_free_urb(ch348->status_urb);
Expand Down Expand Up @@ -669,6 +738,8 @@ index 000000000000..66488a72adf2
+ struct usb_device *usb_dev = serial->dev;
+ struct usb_interface *intf;
+ int ret;
+ bool is_ch342 = (id->idVendor == 0x1a86 &&
+ (id->idProduct == 0x5524 || id->idProduct == 0x7523));
+
+ intf = usb_ifnum_to_if(usb_dev, 0);
+
Expand All @@ -679,6 +750,12 @@ index 000000000000..66488a72adf2
+ return ret;
+ }
+
+ /* CH342 may not have the same endpoint structure as CH348 */
+ if (is_ch342) {
+ dev_info(&serial->dev->dev, "Found WCH CH342\n");
+ return 0;
+ }
+
+ epstatus = &intf->cur_altsetting->endpoint[2].desc;
+ if (!usb_endpoint_is_bulk_in(epstatus)) {
+ dev_err(&serial->dev->dev, "Missing second bulk in (STATUS/INT)\n");
Expand All @@ -700,7 +777,16 @@ index 000000000000..66488a72adf2
+ struct usb_serial_endpoints *epds)
+{
+ int i;
+ bool is_ch342 = (le16_to_cpu(serial->dev->descriptor.idVendor) == 0x1a86 &&
+ (le16_to_cpu(serial->dev->descriptor.idProduct) == 0x5524 ||
+ le16_to_cpu(serial->dev->descriptor.idProduct) == 0x7523));
+
+ /* CH342 is a single port device */
+ if (is_ch342) {
+ return 1;
+ }
+
+ /* CH348 is an 8-port device */
+ for (i = 1; i < CH348_MAXPORT; ++i) {
+ epds->bulk_out[i] = epds->bulk_out[0];
+ epds->bulk_in[i] = epds->bulk_in[0];
Expand All @@ -715,6 +801,13 @@ index 000000000000..66488a72adf2
+static int ch348_suspend(struct usb_serial *serial, pm_message_t message)
+{
+ struct ch348 *ch348 = usb_get_serial_data(serial);
+ bool is_ch342 = (le16_to_cpu(serial->dev->descriptor.idVendor) == 0x1a86 &&
+ (le16_to_cpu(serial->dev->descriptor.idProduct) == 0x5524 ||
+ le16_to_cpu(serial->dev->descriptor.idProduct) == 0x7523));
+
+ /* CH342 doesn't have status_urb */
+ if (is_ch342)
+ return 0;
+
+ usb_kill_urb(ch348->status_urb);
+
Expand All @@ -724,8 +817,15 @@ index 000000000000..66488a72adf2
+static int ch348_resume(struct usb_serial *serial)
+{
+ struct ch348 *ch348 = usb_get_serial_data(serial);
+ bool is_ch342 = (le16_to_cpu(serial->dev->descriptor.idVendor) == 0x1a86 &&
+ (le16_to_cpu(serial->dev->descriptor.idProduct) == 0x5524 ||
+ le16_to_cpu(serial->dev->descriptor.idProduct) == 0x7523));
+ int ret;
+
+ /* CH342 uses generic resume */
+ if (is_ch342)
+ return usb_serial_generic_resume(serial);
+
+ ret = usb_submit_urb(ch348->status_urb, GFP_KERNEL);
+ if (ret) {
+ dev_err(&ch348->udev->dev,
Expand All @@ -742,7 +842,9 @@ index 000000000000..66488a72adf2
+}
+
+static const struct usb_device_id ch348_ids[] = {
+ { USB_DEVICE(0x1a86, 0x55d9), },
+ { USB_DEVICE(0x1a86, 0x55d9), }, /* CH348 */
+ { USB_DEVICE(0x1a86, 0x5524), }, /* CH342 */
+ { USB_DEVICE(0x1a86, 0x7523), }, /* CH342 in some modes */
+ { /* sentinel */ }
+};
+
Expand Down Expand Up @@ -778,6 +880,7 @@ index 000000000000..66488a72adf2
+
+MODULE_AUTHOR("Corentin Labbe <clabbe@baylibre.com>");
+MODULE_DESCRIPTION("USB CH348 Octo port serial converter driver");
+MODULE_ALIAS("usbserial:ch342");
+MODULE_LICENSE("GPL");
--
2.34.1
Expand Down
1 change: 1 addition & 0 deletions linux/linux-5.10.defconfig
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -267,6 +267,7 @@ CONFIG_USB_MUSB_DSPS=y
CONFIG_MUSB_PIO_ONLY=y
CONFIG_USB_SERIAL=y
CONFIG_USB_SERIAL_CH341=y
CONFIG_USB_SERIAL_CH342=m
CONFIG_USB_SERIAL_CH348=m
CONFIG_USB_SERIAL_CP210X=y
CONFIG_USB_SERIAL_FTDI_SIO=y
Expand Down
Loading