diff mbox series

usb: gadget: f_acm: add support for USB_CDC_REQ_SEND_BREAK

Message ID 20220406192914.3302636-1-m.grzeschik@pengutronix.de (mailing list archive)
State Accepted
Commit 7e824f28c9d7275471aa98509a7e3c8369fae379
Headers show
Series usb: gadget: f_acm: add support for USB_CDC_REQ_SEND_BREAK | expand

Commit Message

Michael Grzeschik April 6, 2022, 7:29 p.m. UTC 
Currently the usb side setting of the USB_CDC_REQ_SEND_BREAK control
is not supported. This patch adds the support.

Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de>
---
 drivers/usb/gadget/function/f_acm.c | 10 ++++++++++
 1 file changed, 10 insertions(+)
diff mbox series

Patch

diff --git a/drivers/usb/gadget/function/f_acm.c b/drivers/usb/gadget/function/f_acm.c
index 349945e064bba3..411eb489e0ff11 100644
--- a/drivers/usb/gadget/function/f_acm.c
+++ b/drivers/usb/gadget/function/f_acm.c
@@ -333,6 +333,8 @@  static void acm_complete_set_line_coding(struct usb_ep *ep,
 	}
 }
 
+static int acm_send_break(struct gserial *port, int duration);
+
 static int acm_setup(struct usb_function *f, const struct usb_ctrlrequest *ctrl)
 {
 	struct f_acm		*acm = func_to_acm(f);
@@ -391,6 +393,14 @@  static int acm_setup(struct usb_function *f, const struct usb_ctrlrequest *ctrl)
 		acm->port_handshake_bits = w_value;
 		break;
 
+	case ((USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8)
+			| USB_CDC_REQ_SEND_BREAK:
+		if (w_index != acm->ctrl_id)
+			goto invalid;
+
+		acm_send_break(&acm->port, w_value);
+		break;
+
 	default:
 invalid:
 		dev_vdbg(&cdev->gadget->dev,