diff options
| -rw-r--r-- | drivers/usb/class/cdc-acm.c | 5 | ||||
| -rw-r--r-- | drivers/usb/class/cdc-acm.h | 1 |
2 files changed, 6 insertions, 0 deletions
diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c index ad38c746270a..7ede29d4c7c1 100644 --- a/drivers/usb/class/cdc-acm.c +++ b/drivers/usb/class/cdc-acm.c @@ -1379,6 +1379,8 @@ made_compressed_probe: acm->ctrl_caps = h.usb_cdc_acm_descriptor->bmCapabilities; if (quirks & NO_CAP_LINE) acm->ctrl_caps &= ~USB_CDC_CAP_LINE; + if (quirks & MISSING_CAP_BRK) + acm->ctrl_caps |= USB_CDC_CAP_BRK; acm->ctrlsize = ctrlsize; acm->readsize = readsize; acm->rx_buflimit = num_rx_buf; @@ -2002,6 +2004,9 @@ static const struct usb_device_id acm_ids[] = { .driver_info = IGNORE_DEVICE, }, + /* CH343 supports CAP_BRK, but doesn't advertise it */ + { USB_DEVICE(0x1a86, 0x55d3), .driver_info = MISSING_CAP_BRK, }, + /* control interfaces without any protocol set */ { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, USB_CDC_PROTO_NONE) }, diff --git a/drivers/usb/class/cdc-acm.h b/drivers/usb/class/cdc-acm.h index 759ac15631d3..76f73853a60b 100644 --- a/drivers/usb/class/cdc-acm.h +++ b/drivers/usb/class/cdc-acm.h @@ -113,3 +113,4 @@ struct acm { #define CLEAR_HALT_CONDITIONS BIT(5) #define SEND_ZERO_PACKET BIT(6) #define DISABLE_ECHO BIT(7) +#define MISSING_CAP_BRK BIT(8) |