linux-kernel - [PATCH 2/7] USB: cdc: add serial-state defines

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Date:   Mon, 25 Jul 2022 09:58:36 +0200
From:   Johan Hovold <johan@...nel.org>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Oliver Neukum <oneukum@...e.com>,
        Felipe Balbi <balbi@...nel.org>
Cc:     Yan Xinyu <sdlyyxy@...t.edu.cn>, linux-staging@...ts.linux.dev,
        linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
        Johan Hovold <johan@...nel.org>
Subject: [PATCH 2/7] USB: cdc: add serial-state defines

Add defines for the serial-state bitmap values from section 6.3.5
SerialState of the CDC specification version 1.1.

Note that the bTxCarrier and bRxCarrier bits have been named after their
RS-232 signal equivalents DSR and DCD.

Signed-off-by: Johan Hovold <johan@...nel.org>
---
 include/uapi/linux/usb/cdc.h | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/include/uapi/linux/usb/cdc.h b/include/uapi/linux/usb/cdc.h
index 372c81425cae..78caa9bdc4ae 100644
--- a/include/uapi/linux/usb/cdc.h
+++ b/include/uapi/linux/usb/cdc.h
@@ -306,6 +306,15 @@ struct usb_cdc_notification {
 	__le16	wLength;
 } __attribute__ ((packed));
 
+/* UART State Bitmap Values from 6.3.5 SerialState */
+#define USB_CDC_SERIAL_STATE_DCD		(1 << 0)
+#define USB_CDC_SERIAL_STATE_DSR		(1 << 1)
+#define USB_CDC_SERIAL_STATE_BREAK		(1 << 2)
+#define USB_CDC_SERIAL_STATE_RING_SIGNAL	(1 << 3)
+#define USB_CDC_SERIAL_STATE_FRAMING		(1 << 4)
+#define USB_CDC_SERIAL_STATE_PARITY		(1 << 5)
+#define USB_CDC_SERIAL_STATE_OVERRUN		(1 << 6)
+
 struct usb_cdc_speed_change {
 	__le32	DLBitRRate;	/* contains the downlink bit rate (IN pipe) */
 	__le32	ULBitRate;	/* contains the uplink bit rate (OUT pipe) */
-- 
2.35.1