From 7e824f28c9d7275471aa98509a7e3c8369fae379 Mon Sep 17 00:00:00 2001 From: Michael Grzeschik Date: Wed, 6 Apr 2022 21:29:14 +0200 Subject: [PATCH] usb: gadget: f_acm: add support for USB_CDC_REQ_SEND_BREAK 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 Link: https://lore.kernel.org/r/20220406192914.3302636-1-m.grzeschik@pengutronix.de Signed-off-by: Greg Kroah-Hartman --- drivers/usb/gadget/function/f_acm.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/drivers/usb/gadget/function/f_acm.c b/drivers/usb/gadget/function/f_acm.c index 349945e..411eb48 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, -- 2.7.4