lpc176x: Initial support for serial over usb

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>

1 files changed, 49 insertions, 0 deletions

diff --git a/src/generic/usbstd_cdc.h b/src/generic/usbstd_cdc.h
new file mode 100644
index 00000000..e6873a31
--- /dev/null
+++ b/src/generic/usbstd_cdc.h
@@ -0,0 +1,49 @@
+// Standard definitions for USB CDC devices
+#ifndef __GENERIC_USBSTD_CDC_H
+#define __GENERIC_USBSTD_CDC_H
+
+#define USB_CDC_SUBCLASS_ACM 0x02
+
+#define USB_CDC_ACM_PROTO_AT_V25TER 1
+
+struct usb_cdc_header_descriptor {
+    uint8_t bLength;
+    uint8_t bDescriptorType;
+    uint8_t bDescriptorSubType;
+    uint16_t bcdCDC;
+} PACKED;
+
+#define USB_CDC_HEADER_TYPE 0x00
+#define USB_CDC_ACM_TYPE 0x02
+#define USB_CDC_UNION_TYPE 0x06
+
+#define USB_CDC_CS_INTERFACE 0x24
+#define USB_CDC_CS_ENDPOINT 0x25
+
+struct usb_cdc_acm_descriptor {
+    uint8_t bLength;
+    uint8_t bDescriptorType;
+    uint8_t bDescriptorSubType;
+    uint8_t bmCapabilities;
+} PACKED;
+
+struct usb_cdc_union_descriptor {
+    uint8_t bLength;
+    uint8_t bDescriptorType;
+    uint8_t bDescriptorSubType;
+    uint8_t bMasterInterface0;
+    uint8_t bSlaveInterface0;
+} PACKED;
+
+#define USB_CDC_REQ_SET_LINE_CODING 0x20
+#define USB_CDC_REQ_GET_LINE_CODING 0x21
+#define USB_CDC_REQ_SET_CONTROL_LINE_STATE 0x22
+
+struct usb_cdc_line_coding {
+    uint32_t dwDTERate;
+    uint8_t bCharFormat;
+    uint8_t bParityType;
+    uint8_t bDataBits;
+} PACKED;
+
+#endif // usbstd_cdc.h