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| author | Michael Brown | 2015-02-09 17:33:49 +0100 |
|---|---|---|
| committer | Michael Brown | 2015-02-09 17:34:55 +0100 |
| commit | cf153f60a54b4706225f6326dc65b9343148c9f3 (patch) | |
| tree | 7b395ac183c2d63895bae1cd83718301e78f8060 /src/include/ipxe/cdc.h | |
| parent | [usb] Try multiple USB device configurations (diff) | |
| download | ipxe-cf153f60a54b4706225f6326dc65b9343148c9f3.tar.gz ipxe-cf153f60a54b4706225f6326dc65b9343148c9f3.tar.xz ipxe-cf153f60a54b4706225f6326dc65b9343148c9f3.zip | |
[usb] Handle CDC union functional descriptors
USB Communications Device Class devices may use a union functional
descriptor to group several interfaces into a function.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Diffstat (limited to 'src/include/ipxe/cdc.h')
| -rw-r--r-- | src/include/ipxe/cdc.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/src/include/ipxe/cdc.h b/src/include/ipxe/cdc.h index 2eec598a..929a6a65 100644 --- a/src/include/ipxe/cdc.h +++ b/src/include/ipxe/cdc.h @@ -14,6 +14,19 @@ FILE_LICENCE ( GPL2_OR_LATER ); /** Class code for communications devices */ #define USB_CLASS_CDC 2 +/** Union functional descriptor */ +struct cdc_union_descriptor { + /** Descriptor header */ + struct usb_descriptor_header header; + /** Descriptor subtype */ + uint8_t subtype; + /** Interfaces (variable-length) */ + uint8_t interface[1]; +} __attribute__ (( packed )); + +/** Union functional descriptor subtype */ +#define CDC_SUBTYPE_UNION 6 + /** Ethernet descriptor subtype */ #define CDC_SUBTYPE_ETHERNET 15 @@ -35,4 +48,8 @@ struct cdc_connection_speed_change { uint32_t up; } __attribute__ (( packed )); +extern struct cdc_union_descriptor * +cdc_union_descriptor ( struct usb_configuration_descriptor *config, + struct usb_interface_descriptor *interface ); + #endif /* _IPXE_CDC_H */ |