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usb: add device qualifier support 

Add support for device_qualifier and other_speed_config descriptors.
These are used to query the "other speed" configuration of usb 2.0
devices, i.e. in high-speed mode they return the full-speed
configuration and visa versa.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Gerd Hoffmann 2010-12-08 17:35:22 +01:00
parent 32d4191978
commit 25620cba94
4 changed files with 52 additions and 0 deletions
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46
hw/usb-desc.c
View File

@ -48,6 +48,30 @@ int usb_desc_device(const USBDescID *id, const USBDescDevice *dev,
return bLength;
}
int usb_desc_device_qualifier(const USBDescDevice *dev,
uint8_t *dest, size_t len)
{
uint8_t bLength = 0x0a;
if (len < bLength) {
return -1;
}
dest[0x00] = bLength;
dest[0x01] = USB_DT_DEVICE_QUALIFIER;
dest[0x02] = usb_lo(dev->bcdUSB);
dest[0x03] = usb_hi(dev->bcdUSB);
dest[0x04] = dev->bDeviceClass;
dest[0x05] = dev->bDeviceSubClass;
dest[0x06] = dev->bDeviceProtocol;
dest[0x07] = dev->bMaxPacketSize0;
dest[0x08] = dev->bNumConfigurations;
dest[0x09] = 0; /* reserved */
return bLength;
}
int usb_desc_config(const USBDescConfig *conf, uint8_t *dest, size_t len)
{
uint8_t bLength = 0x09;
@ -263,11 +287,18 @@ int usb_desc_string(USBDevice *dev, int index, uint8_t *dest, size_t len)
int usb_desc_get_descriptor(USBDevice *dev, int value, uint8_t *dest, size_t len)
{
const USBDesc *desc = dev->info->usb_desc;
const USBDescDevice *other_dev;
uint8_t buf[256];
uint8_t type = value >> 8;
uint8_t index = value & 0xff;
int ret = -1;
if (dev->speed == USB_SPEED_HIGH) {
other_dev = dev->info->usb_desc->full;
} else {
other_dev = dev->info->usb_desc->high;
}
switch(type) {
case USB_DT_DEVICE:
ret = usb_desc_device(&desc->id, dev->device, buf, sizeof(buf));
@ -283,6 +314,21 @@ int usb_desc_get_descriptor(USBDevice *dev, int value, uint8_t *dest, size_t len
ret = usb_desc_string(dev, index, buf, sizeof(buf));
trace_usb_desc_string(dev->addr, index, len, ret);
break;
case USB_DT_DEVICE_QUALIFIER:
if (other_dev != NULL) {
ret = usb_desc_device_qualifier(other_dev, buf, sizeof(buf));
}
trace_usb_desc_device_qualifier(dev->addr, len, ret);
break;
case USB_DT_OTHER_SPEED_CONFIG:
if (other_dev != NULL && index < other_dev->bNumConfigurations) {
ret = usb_desc_config(other_dev->confs + index, buf, sizeof(buf));
buf[0x01] = USB_DT_OTHER_SPEED_CONFIG;
}
trace_usb_desc_other_speed_config(dev->addr, index, len, ret);
break;
default:
fprintf(stderr, "%s: %d unknown type %d (len %zd)\n", __FUNCTION__,
dev->addr, type, len);

2
hw/usb-desc.h
View File

@ -72,6 +72,8 @@ struct USBDesc {
/* generate usb packages from structs */
int usb_desc_device(const USBDescID *id, const USBDescDevice *dev,
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, uint8_t *dest, size_t len);
int usb_desc_iface(const USBDescIface *iface, uint8_t *dest, size_t len);
int usb_desc_endpoint(const USBDescEndpoint *ep, uint8_t *dest, size_t len);

2
hw/usb.h
View File

@ -122,6 +122,8 @@
#define USB_DT_STRING 0x03
#define USB_DT_INTERFACE 0x04
#define USB_DT_ENDPOINT 0x05
#define USB_DT_DEVICE_QUALIFIER 0x06
#define USB_DT_OTHER_SPEED_CONFIG 0x07
#define USB_ENDPOINT_XFER_CONTROL 0
#define USB_ENDPOINT_XFER_ISOC 1

2
trace-events
View File

@ -192,7 +192,9 @@ disable sun4m_iommu_bad_addr(uint64_t addr) "bad addr %"PRIx64""
# hw/usb-desc.c
disable usb_desc_device(int addr, int len, int ret) "dev %d query device, len %d, ret %d"
disable usb_desc_device_qualifier(int addr, int len, int ret) "dev %d query device qualifier, len %d, ret %d"
disable usb_desc_config(int addr, int index, int len, int ret) "dev %d query config %d, len %d, ret %d"
disable usb_desc_other_speed_config(int addr, int index, int len, int ret) "dev %d query config %d, len %d, ret %d"
disable usb_desc_string(int addr, int index, int len, int ret) "dev %d query string %d, len %d, ret %d"
disable usb_set_addr(int addr) "dev %d"
disable usb_set_config(int addr, int config, int ret) "dev %d, config %d, ret %d"