root / hw / usb-desc.c @ 007fd62f
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| 1 |
#include "usb.h" |
|---|---|
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#include "usb-desc.h" |
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#include "trace.h" |
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|
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/* ------------------------------------------------------------------ */
|
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|
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static uint8_t usb_lo(uint16_t val)
|
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{
|
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return val & 0xff; |
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} |
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|
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static uint8_t usb_hi(uint16_t val)
|
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{
|
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return (val >> 8) & 0xff; |
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} |
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|
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int usb_desc_device(const USBDescID *id, const USBDescDevice *dev, |
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uint8_t *dest, size_t len) |
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{
|
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uint8_t bLength = 0x12;
|
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|
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if (len < bLength) {
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return -1; |
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} |
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|
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dest[0x00] = bLength;
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dest[0x01] = USB_DT_DEVICE;
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|
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dest[0x02] = usb_lo(dev->bcdUSB);
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dest[0x03] = usb_hi(dev->bcdUSB);
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dest[0x04] = dev->bDeviceClass;
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dest[0x05] = dev->bDeviceSubClass;
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dest[0x06] = dev->bDeviceProtocol;
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dest[0x07] = dev->bMaxPacketSize0;
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|
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dest[0x08] = usb_lo(id->idVendor);
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dest[0x09] = usb_hi(id->idVendor);
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dest[0x0a] = usb_lo(id->idProduct);
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dest[0x0b] = usb_hi(id->idProduct);
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dest[0x0c] = usb_lo(id->bcdDevice);
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dest[0x0d] = usb_hi(id->bcdDevice);
|
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dest[0x0e] = id->iManufacturer;
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dest[0x0f] = id->iProduct;
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dest[0x10] = id->iSerialNumber;
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|
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dest[0x11] = dev->bNumConfigurations;
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|
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return bLength;
|
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} |
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|
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int usb_desc_device_qualifier(const USBDescDevice *dev, |
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uint8_t *dest, size_t len) |
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{
|
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uint8_t bLength = 0x0a;
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|
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if (len < bLength) {
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return -1; |
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} |
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|
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dest[0x00] = bLength;
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dest[0x01] = USB_DT_DEVICE_QUALIFIER;
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|
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dest[0x02] = usb_lo(dev->bcdUSB);
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dest[0x03] = usb_hi(dev->bcdUSB);
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dest[0x04] = dev->bDeviceClass;
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dest[0x05] = dev->bDeviceSubClass;
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dest[0x06] = dev->bDeviceProtocol;
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dest[0x07] = dev->bMaxPacketSize0;
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dest[0x08] = dev->bNumConfigurations;
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dest[0x09] = 0; /* reserved */ |
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|
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return bLength;
|
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} |
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|
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int usb_desc_config(const USBDescConfig *conf, uint8_t *dest, size_t len) |
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{
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uint8_t bLength = 0x09;
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uint16_t wTotalLength = 0;
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int i, rc;
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|
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if (len < bLength) {
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return -1; |
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} |
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|
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dest[0x00] = bLength;
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dest[0x01] = USB_DT_CONFIG;
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dest[0x04] = conf->bNumInterfaces;
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dest[0x05] = conf->bConfigurationValue;
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dest[0x06] = conf->iConfiguration;
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dest[0x07] = conf->bmAttributes;
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dest[0x08] = conf->bMaxPower;
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wTotalLength += bLength; |
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|
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/* handle grouped interfaces if any*/
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for (i = 0; i < conf->nif_groups; i++) { |
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rc = usb_desc_iface_group(&(conf->if_groups[i]), |
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dest + wTotalLength, |
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len - wTotalLength); |
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if (rc < 0) { |
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return rc;
|
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} |
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wTotalLength += rc; |
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} |
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|
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/* handle normal (ungrouped / no IAD) interfaces if any */
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for (i = 0; i < conf->nif; i++) { |
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rc = usb_desc_iface(conf->ifs + i, dest + wTotalLength, len - wTotalLength); |
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if (rc < 0) { |
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return rc;
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} |
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wTotalLength += rc; |
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} |
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|
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dest[0x02] = usb_lo(wTotalLength);
|
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dest[0x03] = usb_hi(wTotalLength);
|
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return wTotalLength;
|
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} |
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|
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int usb_desc_iface_group(const USBDescIfaceAssoc *iad, uint8_t *dest, |
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size_t len) |
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{
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int pos = 0; |
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int i = 0; |
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|
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/* handle interface association descriptor */
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uint8_t bLength = 0x08;
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|
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if (len < bLength) {
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return -1; |
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} |
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|
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dest[0x00] = bLength;
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dest[0x01] = USB_DT_INTERFACE_ASSOC;
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dest[0x02] = iad->bFirstInterface;
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dest[0x03] = iad->bInterfaceCount;
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dest[0x04] = iad->bFunctionClass;
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dest[0x05] = iad->bFunctionSubClass;
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dest[0x06] = iad->bFunctionProtocol;
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dest[0x07] = iad->iFunction;
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pos += bLength; |
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|
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/* handle associated interfaces in this group */
|
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for (i = 0; i < iad->nif; i++) { |
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int rc = usb_desc_iface(&(iad->ifs[i]), dest + pos, len - pos);
|
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if (rc < 0) { |
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return rc;
|
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} |
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pos += rc; |
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} |
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return pos;
|
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} |
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|
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int usb_desc_iface(const USBDescIface *iface, uint8_t *dest, size_t len) |
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{
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uint8_t bLength = 0x09;
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int i, rc, pos = 0; |
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|
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if (len < bLength) {
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return -1; |
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} |
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|
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dest[0x00] = bLength;
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dest[0x01] = USB_DT_INTERFACE;
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dest[0x02] = iface->bInterfaceNumber;
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dest[0x03] = iface->bAlternateSetting;
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dest[0x04] = iface->bNumEndpoints;
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dest[0x05] = iface->bInterfaceClass;
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dest[0x06] = iface->bInterfaceSubClass;
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dest[0x07] = iface->bInterfaceProtocol;
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dest[0x08] = iface->iInterface;
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pos += bLength; |
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|
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for (i = 0; i < iface->ndesc; i++) { |
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rc = usb_desc_other(iface->descs + i, dest + pos, len - pos); |
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if (rc < 0) { |
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return rc;
|
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} |
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pos += rc; |
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} |
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|
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for (i = 0; i < iface->bNumEndpoints; i++) { |
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rc = usb_desc_endpoint(iface->eps + i, dest + pos, len - pos); |
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if (rc < 0) { |
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return rc;
|
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} |
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pos += rc; |
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} |
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|
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return pos;
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} |
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|
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int usb_desc_endpoint(const USBDescEndpoint *ep, uint8_t *dest, size_t len) |
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{
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uint8_t bLength = 0x07;
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|
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if (len < bLength) {
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return -1; |
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} |
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|
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dest[0x00] = bLength;
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dest[0x01] = USB_DT_ENDPOINT;
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dest[0x02] = ep->bEndpointAddress;
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dest[0x03] = ep->bmAttributes;
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dest[0x04] = usb_lo(ep->wMaxPacketSize);
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dest[0x05] = usb_hi(ep->wMaxPacketSize);
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dest[0x06] = ep->bInterval;
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return bLength;
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} |
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|
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int usb_desc_other(const USBDescOther *desc, uint8_t *dest, size_t len) |
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{
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int bLength = desc->length ? desc->length : desc->data[0]; |
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|
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if (len < bLength) {
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return -1; |
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} |
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|
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memcpy(dest, desc->data, bLength); |
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return bLength;
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} |
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|
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/* ------------------------------------------------------------------ */
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|
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static void usb_desc_setdefaults(USBDevice *dev) |
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{
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const USBDesc *desc = dev->info->usb_desc;
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|
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assert(desc != NULL);
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switch (dev->speed) {
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case USB_SPEED_LOW:
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case USB_SPEED_FULL:
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dev->device = desc->full; |
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break;
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case USB_SPEED_HIGH:
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dev->device = desc->high; |
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break;
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} |
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dev->config = dev->device->confs; |
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} |
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|
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void usb_desc_init(USBDevice *dev)
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{
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dev->speed = USB_SPEED_FULL; |
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usb_desc_setdefaults(dev); |
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} |
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|
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void usb_desc_attach(USBDevice *dev)
|
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{
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const USBDesc *desc = dev->info->usb_desc;
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|
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assert(desc != NULL);
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if (desc->high && (dev->port->speedmask & USB_SPEED_MASK_HIGH)) {
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dev->speed = USB_SPEED_HIGH; |
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} else if (desc->full && (dev->port->speedmask & USB_SPEED_MASK_FULL)) { |
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dev->speed = USB_SPEED_FULL; |
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} else {
|
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fprintf(stderr, "usb: port/device speed mismatch for \"%s\"\n",
|
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dev->info->product_desc); |
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return;
|
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} |
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usb_desc_setdefaults(dev); |
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} |
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|
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void usb_desc_set_string(USBDevice *dev, uint8_t index, const char *str) |
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{
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USBDescString *s; |
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|
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QLIST_FOREACH(s, &dev->strings, next) {
|
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if (s->index == index) {
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break;
|
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} |
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} |
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if (s == NULL) { |
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s = qemu_mallocz(sizeof(*s));
|
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s->index = index; |
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QLIST_INSERT_HEAD(&dev->strings, s, next); |
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} |
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qemu_free(s->str); |
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s->str = qemu_strdup(str); |
| 282 |
} |
| 283 |
|
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const char *usb_desc_get_string(USBDevice *dev, uint8_t index) |
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{
|
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USBDescString *s; |
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|
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QLIST_FOREACH(s, &dev->strings, next) {
|
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if (s->index == index) {
|
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return s->str;
|
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} |
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} |
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return NULL; |
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} |
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|
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int usb_desc_string(USBDevice *dev, int index, uint8_t *dest, size_t len) |
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{
|
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uint8_t bLength, pos, i; |
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const char *str; |
| 300 |
|
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if (len < 4) { |
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return -1; |
| 303 |
} |
| 304 |
|
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if (index == 0) { |
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/* language ids */
|
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dest[0] = 4; |
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dest[1] = USB_DT_STRING;
|
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dest[2] = 0x09; |
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dest[3] = 0x04; |
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return 4; |
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} |
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|
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str = usb_desc_get_string(dev, index); |
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if (str == NULL) { |
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str = dev->info->usb_desc->str[index]; |
| 317 |
if (str == NULL) { |
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return 0; |
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} |
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} |
| 321 |
|
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bLength = strlen(str) * 2 + 2; |
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dest[0] = bLength;
|
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dest[1] = USB_DT_STRING;
|
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i = 0; pos = 2; |
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while (pos+1 < bLength && pos+1 < len) { |
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dest[pos++] = str[i++]; |
| 328 |
dest[pos++] = 0;
|
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} |
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return pos;
|
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} |
| 332 |
|
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int usb_desc_get_descriptor(USBDevice *dev, int value, uint8_t *dest, size_t len) |
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{
|
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const USBDesc *desc = dev->info->usb_desc;
|
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const USBDescDevice *other_dev;
|
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uint8_t buf[256];
|
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uint8_t type = value >> 8;
|
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uint8_t index = value & 0xff;
|
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int ret = -1; |
| 341 |
|
| 342 |
if (dev->speed == USB_SPEED_HIGH) {
|
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other_dev = dev->info->usb_desc->full; |
| 344 |
} else {
|
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other_dev = dev->info->usb_desc->high; |
| 346 |
} |
| 347 |
|
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switch(type) {
|
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case USB_DT_DEVICE:
|
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ret = usb_desc_device(&desc->id, dev->device, buf, sizeof(buf));
|
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trace_usb_desc_device(dev->addr, len, ret); |
| 352 |
break;
|
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case USB_DT_CONFIG:
|
| 354 |
if (index < dev->device->bNumConfigurations) {
|
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ret = usb_desc_config(dev->device->confs + index, buf, sizeof(buf));
|
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} |
| 357 |
trace_usb_desc_config(dev->addr, index, len, ret); |
| 358 |
break;
|
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case USB_DT_STRING:
|
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ret = usb_desc_string(dev, index, buf, sizeof(buf));
|
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trace_usb_desc_string(dev->addr, index, len, ret); |
| 362 |
break;
|
| 363 |
|
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case USB_DT_DEVICE_QUALIFIER:
|
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if (other_dev != NULL) { |
| 366 |
ret = usb_desc_device_qualifier(other_dev, buf, sizeof(buf));
|
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} |
| 368 |
trace_usb_desc_device_qualifier(dev->addr, len, ret); |
| 369 |
break;
|
| 370 |
case USB_DT_OTHER_SPEED_CONFIG:
|
| 371 |
if (other_dev != NULL && index < other_dev->bNumConfigurations) { |
| 372 |
ret = usb_desc_config(other_dev->confs + index, buf, sizeof(buf));
|
| 373 |
buf[0x01] = USB_DT_OTHER_SPEED_CONFIG;
|
| 374 |
} |
| 375 |
trace_usb_desc_other_speed_config(dev->addr, index, len, ret); |
| 376 |
break;
|
| 377 |
|
| 378 |
default:
|
| 379 |
fprintf(stderr, "%s: %d unknown type %d (len %zd)\n", __FUNCTION__,
|
| 380 |
dev->addr, type, len); |
| 381 |
break;
|
| 382 |
} |
| 383 |
|
| 384 |
if (ret > 0) { |
| 385 |
if (ret > len) {
|
| 386 |
ret = len; |
| 387 |
} |
| 388 |
memcpy(dest, buf, ret); |
| 389 |
} |
| 390 |
return ret;
|
| 391 |
} |
| 392 |
|
| 393 |
int usb_desc_handle_control(USBDevice *dev, USBPacket *p,
|
| 394 |
int request, int value, int index, int length, uint8_t *data) |
| 395 |
{
|
| 396 |
const USBDesc *desc = dev->info->usb_desc;
|
| 397 |
int i, ret = -1; |
| 398 |
|
| 399 |
assert(desc != NULL);
|
| 400 |
switch(request) {
|
| 401 |
case DeviceOutRequest | USB_REQ_SET_ADDRESS:
|
| 402 |
dev->addr = value; |
| 403 |
trace_usb_set_addr(dev->addr); |
| 404 |
ret = 0;
|
| 405 |
break;
|
| 406 |
|
| 407 |
case DeviceRequest | USB_REQ_GET_DESCRIPTOR:
|
| 408 |
ret = usb_desc_get_descriptor(dev, value, data, length); |
| 409 |
break;
|
| 410 |
|
| 411 |
case DeviceRequest | USB_REQ_GET_CONFIGURATION:
|
| 412 |
data[0] = dev->config->bConfigurationValue;
|
| 413 |
ret = 1;
|
| 414 |
break;
|
| 415 |
case DeviceOutRequest | USB_REQ_SET_CONFIGURATION:
|
| 416 |
for (i = 0; i < dev->device->bNumConfigurations; i++) { |
| 417 |
if (dev->device->confs[i].bConfigurationValue == value) {
|
| 418 |
dev->config = dev->device->confs + i; |
| 419 |
ret = 0;
|
| 420 |
} |
| 421 |
} |
| 422 |
trace_usb_set_config(dev->addr, value, ret); |
| 423 |
break;
|
| 424 |
|
| 425 |
case DeviceRequest | USB_REQ_GET_STATUS:
|
| 426 |
data[0] = 0; |
| 427 |
if (dev->config->bmAttributes & 0x40) { |
| 428 |
data[0] |= 1 << USB_DEVICE_SELF_POWERED; |
| 429 |
} |
| 430 |
if (dev->remote_wakeup) {
|
| 431 |
data[0] |= 1 << USB_DEVICE_REMOTE_WAKEUP; |
| 432 |
} |
| 433 |
data[1] = 0x00; |
| 434 |
ret = 2;
|
| 435 |
break;
|
| 436 |
case DeviceOutRequest | USB_REQ_CLEAR_FEATURE:
|
| 437 |
if (value == USB_DEVICE_REMOTE_WAKEUP) {
|
| 438 |
dev->remote_wakeup = 0;
|
| 439 |
ret = 0;
|
| 440 |
} |
| 441 |
trace_usb_clear_device_feature(dev->addr, value, ret); |
| 442 |
break;
|
| 443 |
case DeviceOutRequest | USB_REQ_SET_FEATURE:
|
| 444 |
if (value == USB_DEVICE_REMOTE_WAKEUP) {
|
| 445 |
dev->remote_wakeup = 1;
|
| 446 |
ret = 0;
|
| 447 |
} |
| 448 |
trace_usb_set_device_feature(dev->addr, value, ret); |
| 449 |
break;
|
| 450 |
} |
| 451 |
return ret;
|
| 452 |
} |