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usb: add support for microsoft os descriptors

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This patch adds support for special usb descriptors used by microsoft
windows.  They allow more fine-grained control over driver binding and
adding entries to the registry for configuration.

As this is a guest-visible change the "msos-desc" compat property
has been added to turn this off for 1.7 + older

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Gerd Hoffmann 2013-11-20 07:32:31 +01:00
parent 1cf892ca26
commit 5319dc7b42
9 changed files with 297 additions and 6 deletions
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11
hw/usb/desc.h
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@ -2,6 +2,7 @@
#define QEMU_HW_USB_DESC_H
#include <inttypes.h>
#include <wchar.h>
/* binary representation */
typedef struct USBDescriptor {
@ -182,6 +183,11 @@ struct USBDescOther {
const uint8_t *data;
};
struct USBDescMSOS {
const wchar_t *Label;
bool SelectiveSuspendEnabled;
};
typedef const char *USBDescStrings[256];
struct USBDesc {
@ -190,6 +196,7 @@ struct USBDesc {
const USBDescDevice *high;
const USBDescDevice *super;
const char* const *str;
const USBDescMSOS *msos;
};
#define USB_DESC_FLAG_SUPER (1 << 1)
@ -207,7 +214,7 @@ static inline uint8_t usb_hi(uint16_t val)
/* generate usb packages from structs */
int usb_desc_device(const USBDescID *id, const USBDescDevice *dev,
uint8_t *dest, size_t len);
bool msos, uint8_t *dest, size_t len);
int usb_desc_device_qualifier(const USBDescDevice *dev,
uint8_t *dest, size_t len);
int usb_desc_config(const USBDescConfig *conf, int flags,
@ -219,6 +226,8 @@ int usb_desc_iface(const USBDescIface *iface, int flags,
int usb_desc_endpoint(const USBDescEndpoint *ep, int flags,
uint8_t *dest, size_t len);
int usb_desc_other(const USBDescOther *desc, uint8_t *dest, size_t len);
int usb_desc_msos(const USBDesc *desc, USBPacket *p,
int index, uint8_t *dest, size_t len);
/* control message emulation helpers */
void usb_desc_init(USBDevice *dev);