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USB: Add simple serial subclass support

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This uses the newly allocated simple serial SubClass
and Protocol identifiers to make enumeration of serial
consoles over USB easier.  The simple usb serial kernel
driver can select based on vid/class/subclass/protocol,
making it trivial to attach to serial consoles.

Signed-off-by: Anton Staaf <robotboy@chromium.org>

BRANCH=None
BUG=None
TEST=make buildall -j
     Enable USB console on discovery-stm32f072 and verify
     that a new ttyUSB? device is discovered.

Change-Id: I6d3e414a20753573c2ee90a48fb1d5dce2c3972d
Reviewed-on: https://chromium-review.googlesource.com/225869
Tested-by: Anton Staaf <robotboy@chromium.org>
Reviewed-by: Vincent Palatin <vpalatin@chromium.org>
Commit-Queue: Anton Staaf <robotboy@chromium.org>
This commit is contained in:
Anton Staaf
2014-10-28 10:53:14 -07:00
committed by chrome-internal-fetch
parent ca74d14ea9
commit 4626fd37df
3 changed files with 8 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
chip/stm32/usb-stream.h
View File

@@ -151,8 +151,8 @@ extern struct out_stream_ops const usb_stream_out_stream_ops;
.bAlternateSetting = 0, \
.bNumEndpoints = 2, \
.bInterfaceClass = USB_CLASS_VENDOR_SPEC, \
.bInterfaceSubClass = 0, \
.bInterfaceProtocol = 0, \
.bInterfaceSubClass = USB_SUBCLASS_GOOGLE_SERIAL, \
.bInterfaceProtocol = USB_PROTOCOL_GOOGLE_SERIAL, \
.iInterface = 0, \
}; \
const struct usb_endpoint_descriptor \

4
chip/stm32/usb_console.c
View File

@@ -37,8 +37,8 @@ const struct usb_interface_descriptor USB_IFACE_DESC(USB_IFACE_CONSOLE) = {
.bAlternateSetting = 0,
.bNumEndpoints = 2,
.bInterfaceClass = USB_CLASS_VENDOR_SPEC,
.bInterfaceSubClass = 0,
.bInterfaceProtocol = 0,
.bInterfaceSubClass = USB_SUBCLASS_GOOGLE_SERIAL,
.bInterfaceProtocol = USB_PROTOCOL_GOOGLE_SERIAL,
.iInterface = 0,
};
const struct usb_endpoint_descriptor USB_EP_DESC(USB_IFACE_CONSOLE, 0) = {

4
include/usb.h
View File

@@ -154,6 +154,10 @@ struct usb_endpoint_descriptor {
/* USB Vendor ID assigned to Google Inc. */
#define USB_VID_GOOGLE 0x18d1
/* Google specific SubClass/Protocol assignments */
#define USB_SUBCLASS_GOOGLE_SERIAL 0x50
#define USB_PROTOCOL_GOOGLE_SERIAL 0x01
/* Control requests */
/* bRequestType fields */