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usb: add usb_desc_attach

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Add usb_desc_attach() which sets up the device according to the speed
the usb port is able to handle.  This function can be hooked into the
handle_attach callback.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Gerd Hoffmann 2010-12-03 18:07:20 +01:00
parent b6f77fbe23
commit 32d4191978
2 changed files with 34 additions and 3 deletions
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36
hw/usb-desc.c
View File

@ -153,16 +153,46 @@ int usb_desc_other(const USBDescOther *desc, uint8_t *dest, size_t len)
/* ------------------------------------------------------------------ */
void usb_desc_init(USBDevice *dev)
static void usb_desc_setdefaults(USBDevice *dev)
{
const USBDesc *desc = dev->info->usb_desc;
assert(desc != NULL);
dev->speed = USB_SPEED_FULL;
dev->device = desc->full;
switch (dev->speed) {
case USB_SPEED_LOW:
case USB_SPEED_FULL:
dev->device = desc->full;
break;
case USB_SPEED_HIGH:
dev->device = desc->high;
break;
}
dev->config = dev->device->confs;
}
void usb_desc_init(USBDevice *dev)
{
dev->speed = USB_SPEED_FULL;
usb_desc_setdefaults(dev);
}
void usb_desc_attach(USBDevice *dev)
{
const USBDesc *desc = dev->info->usb_desc;
assert(desc != NULL);
if (desc->high && (dev->port->speedmask & USB_SPEED_MASK_HIGH)) {
dev->speed = USB_SPEED_HIGH;
} else if (desc->full && (dev->port->speedmask & USB_SPEED_MASK_FULL)) {
dev->speed = USB_SPEED_FULL;
} else {
fprintf(stderr, "usb: port/device speed mismatch for \"%s\"\n",
dev->info->product_desc);
return;
}
usb_desc_setdefaults(dev);
}
void usb_desc_set_string(USBDevice *dev, uint8_t index, const char *str)
{
USBDescString *s;

1
hw/usb-desc.h
View File

@ -79,6 +79,7 @@ int usb_desc_other(const USBDescOther *desc, uint8_t *dest, size_t len);
/* control message emulation helpers */
void usb_desc_init(USBDevice *dev);
void usb_desc_attach(USBDevice *dev);
void usb_desc_set_string(USBDevice *dev, uint8_t index, const char *str);
const char *usb_desc_get_string(USBDevice *dev, uint8_t index);
int usb_desc_string(USBDevice *dev, int index, uint8_t *dest, size_t len);