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usb: use USBDescriptor for config descriptors.

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Add config descriptor substruct to USBDescriptor,
use it in the descriptor generator code.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Gerd Hoffmann 2012-03-29 12:24:08 +02:00
parent 3cfeee6177
commit 0a263db17a
2 changed files with 21 additions and 10 deletions
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20
hw/usb/desc.c
View File

@ -78,19 +78,21 @@ int usb_desc_config(const USBDescConfig *conf, uint8_t *dest, size_t len)
{
uint8_t bLength = 0x09;
uint16_t wTotalLength = 0;
USBDescriptor *d = (void *)dest;
int i, rc;
if (len < bLength) {
return -1;
}
dest[0x00] = bLength;
dest[0x01] = USB_DT_CONFIG;
dest[0x04] = conf->bNumInterfaces;
dest[0x05] = conf->bConfigurationValue;
dest[0x06] = conf->iConfiguration;
dest[0x07] = conf->bmAttributes;
dest[0x08] = conf->bMaxPower;
d->bLength = bLength;
d->bDescriptorType = USB_DT_CONFIG;
d->u.config.bNumInterfaces = conf->bNumInterfaces;
d->u.config.bConfigurationValue = conf->bConfigurationValue;
d->u.config.iConfiguration = conf->iConfiguration;
d->u.config.bmAttributes = conf->bmAttributes;
d->u.config.bMaxPower = conf->bMaxPower;
wTotalLength += bLength;
/* handle grouped interfaces if any */
@ -113,8 +115,8 @@ int usb_desc_config(const USBDescConfig *conf, uint8_t *dest, size_t len)
wTotalLength += rc;
}
dest[0x02] = usb_lo(wTotalLength);
dest[0x03] = usb_hi(wTotalLength);
d->u.config.wTotalLength_lo = usb_lo(wTotalLength);
d->u.config.wTotalLength_hi = usb_hi(wTotalLength);
return wTotalLength;
}

9
hw/usb/desc.h
View File

@ -36,6 +36,15 @@ typedef struct USBDescriptor {
uint8_t bNumConfigurations;
uint8_t bReserved;
} device_qualifier;
struct {
uint8_t wTotalLength_lo;
uint8_t wTotalLength_hi;
uint8_t bNumInterfaces;
uint8_t bConfigurationValue;
uint8_t iConfiguration;
uint8_t bmAttributes;
uint8_t bMaxPower;
} config;
} u;
} QEMU_PACKED USBDescriptor;