| #include "usb.h" |
| #include "usb-desc.h" |
| #include "trace.h" |
| |
| /* ------------------------------------------------------------------ */ |
| |
| static uint8_t usb_lo(uint16_t val) |
| { |
| return val & 0xff; |
| } |
| |
| static uint8_t usb_hi(uint16_t val) |
| { |
| return (val >> 8) & 0xff; |
| } |
| |
| int usb_desc_device(const USBDescID *id, const USBDescDevice *dev, |
| uint8_t *dest, size_t len) |
| { |
| uint8_t bLength = 0x12; |
| |
| if (len < bLength) { |
| return -1; |
| } |
| |
| dest[0x00] = bLength; |
| dest[0x01] = USB_DT_DEVICE; |
| |
| 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] = usb_lo(id->idVendor); |
| dest[0x09] = usb_hi(id->idVendor); |
| dest[0x0a] = usb_lo(id->idProduct); |
| dest[0x0b] = usb_hi(id->idProduct); |
| dest[0x0c] = usb_lo(id->bcdDevice); |
| dest[0x0d] = usb_hi(id->bcdDevice); |
| dest[0x0e] = id->iManufacturer; |
| dest[0x0f] = id->iProduct; |
| dest[0x10] = id->iSerialNumber; |
| |
| dest[0x11] = dev->bNumConfigurations; |
| |
| 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; |
| uint16_t wTotalLength = 0; |
| 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; |
| wTotalLength += bLength; |
| |
| /* handle grouped interfaces if any*/ |
| for (i = 0; i < conf->nif_groups; i++) { |
| rc = usb_desc_iface_group(&(conf->if_groups[i]), |
| dest + wTotalLength, |
| len - wTotalLength); |
| if (rc < 0) { |
| return rc; |
| } |
| wTotalLength += rc; |
| } |
| |
| /* handle normal (ungrouped / no IAD) interfaces if any */ |
| for (i = 0; i < conf->nif; i++) { |
| rc = usb_desc_iface(conf->ifs + i, dest + wTotalLength, len - wTotalLength); |
| if (rc < 0) { |
| return rc; |
| } |
| wTotalLength += rc; |
| } |
| |
| dest[0x02] = usb_lo(wTotalLength); |
| dest[0x03] = usb_hi(wTotalLength); |
| return wTotalLength; |
| } |
| |
| int usb_desc_iface_group(const USBDescIfaceAssoc *iad, uint8_t *dest, |
| size_t len) |
| { |
| int pos = 0; |
| int i = 0; |
| |
| /* handle interface association descriptor */ |
| uint8_t bLength = 0x08; |
| |
| if (len < bLength) { |
| return -1; |
| } |
| |
| dest[0x00] = bLength; |
| dest[0x01] = USB_DT_INTERFACE_ASSOC; |
| dest[0x02] = iad->bFirstInterface; |
| dest[0x03] = iad->bInterfaceCount; |
| dest[0x04] = iad->bFunctionClass; |
| dest[0x05] = iad->bFunctionSubClass; |
| dest[0x06] = iad->bFunctionProtocol; |
| dest[0x07] = iad->iFunction; |
| pos += bLength; |
| |
| /* handle associated interfaces in this group */ |
| for (i = 0; i < iad->nif; i++) { |
| int rc = usb_desc_iface(&(iad->ifs[i]), dest + pos, len - pos); |
| if (rc < 0) { |
| return rc; |
| } |
| pos += rc; |
| } |
| |
| return pos; |
| } |
| |
| int usb_desc_iface(const USBDescIface *iface, uint8_t *dest, size_t len) |
| { |
| uint8_t bLength = 0x09; |
| int i, rc, pos = 0; |
| |
| if (len < bLength) { |
| return -1; |
| } |
| |
| dest[0x00] = bLength; |
| dest[0x01] = USB_DT_INTERFACE; |
| dest[0x02] = iface->bInterfaceNumber; |
| dest[0x03] = iface->bAlternateSetting; |
| dest[0x04] = iface->bNumEndpoints; |
| dest[0x05] = iface->bInterfaceClass; |
| dest[0x06] = iface->bInterfaceSubClass; |
| dest[0x07] = iface->bInterfaceProtocol; |
| dest[0x08] = iface->iInterface; |
| pos += bLength; |
| |
| for (i = 0; i < iface->ndesc; i++) { |
| rc = usb_desc_other(iface->descs + i, dest + pos, len - pos); |
| if (rc < 0) { |
| return rc; |
| } |
| pos += rc; |
| } |
| |
| for (i = 0; i < iface->bNumEndpoints; i++) { |
| rc = usb_desc_endpoint(iface->eps + i, dest + pos, len - pos); |
| if (rc < 0) { |
| return rc; |
| } |
| pos += rc; |
| } |
| |
| return pos; |
| } |
| |
| int usb_desc_endpoint(const USBDescEndpoint *ep, uint8_t *dest, size_t len) |
| { |
| uint8_t bLength = ep->is_audio ? 0x09 : 0x07; |
| uint8_t extralen = ep->extra ? ep->extra[0] : 0; |
| |
| if (len < bLength + extralen) { |
| return -1; |
| } |
| |
| dest[0x00] = bLength; |
| dest[0x01] = USB_DT_ENDPOINT; |
| dest[0x02] = ep->bEndpointAddress; |
| dest[0x03] = ep->bmAttributes; |
| dest[0x04] = usb_lo(ep->wMaxPacketSize); |
| dest[0x05] = usb_hi(ep->wMaxPacketSize); |
| dest[0x06] = ep->bInterval; |
| if (ep->is_audio) { |
| dest[0x07] = ep->bRefresh; |
| dest[0x08] = ep->bSynchAddress; |
| } |
| if (ep->extra) { |
| memcpy(dest + bLength, ep->extra, extralen); |
| } |
| |
| return bLength + extralen; |
| } |
| |
| int usb_desc_other(const USBDescOther *desc, uint8_t *dest, size_t len) |
| { |
| int bLength = desc->length ? desc->length : desc->data[0]; |
| |
| if (len < bLength) { |
| return -1; |
| } |
| |
| memcpy(dest, desc->data, bLength); |
| return bLength; |
| } |
| |
| /* ------------------------------------------------------------------ */ |
| |
| static void usb_desc_ep_init(USBDevice *dev) |
| { |
| const USBDescIface *iface; |
| int i, e, pid, ep; |
| |
| usb_ep_init(dev); |
| for (i = 0; i < dev->ninterfaces; i++) { |
| iface = dev->ifaces[i]; |
| if (iface == NULL) { |
| continue; |
| } |
| for (e = 0; e < iface->bNumEndpoints; e++) { |
| pid = (iface->eps[e].bEndpointAddress & USB_DIR_IN) ? |
| USB_TOKEN_IN : USB_TOKEN_OUT; |
| ep = iface->eps[e].bEndpointAddress & 0x0f; |
| usb_ep_set_type(dev, pid, ep, iface->eps[e].bmAttributes & 0x03); |
| usb_ep_set_ifnum(dev, pid, ep, iface->bInterfaceNumber); |
| usb_ep_set_max_packet_size(dev, pid, ep, |
| iface->eps[e].wMaxPacketSize); |
| } |
| } |
| } |
| |
| static const USBDescIface *usb_desc_find_interface(USBDevice *dev, |
| int nif, int alt) |
| { |
| const USBDescIface *iface; |
| int g, i; |
| |
| if (!dev->config) { |
| return NULL; |
| } |
| for (g = 0; g < dev->config->nif_groups; g++) { |
| for (i = 0; i < dev->config->if_groups[g].nif; i++) { |
| iface = &dev->config->if_groups[g].ifs[i]; |
| if (iface->bInterfaceNumber == nif && |
| iface->bAlternateSetting == alt) { |
| return iface; |
| } |
| } |
| } |
| for (i = 0; i < dev->config->nif; i++) { |
| iface = &dev->config->ifs[i]; |
| if (iface->bInterfaceNumber == nif && |
| iface->bAlternateSetting == alt) { |
| return iface; |
| } |
| } |
| return NULL; |
| } |
| |
| static int usb_desc_set_interface(USBDevice *dev, int index, int value) |
| { |
| const USBDescIface *iface; |
| int old; |
| |
| iface = usb_desc_find_interface(dev, index, value); |
| if (iface == NULL) { |
| return -1; |
| } |
| |
| old = dev->altsetting[index]; |
| dev->altsetting[index] = value; |
| dev->ifaces[index] = iface; |
| usb_desc_ep_init(dev); |
| |
| if (dev->info->set_interface && old != value) { |
| dev->info->set_interface(dev, index, old, value); |
| } |
| return 0; |
| } |
| |
| static int usb_desc_set_config(USBDevice *dev, int value) |
| { |
| int i; |
| |
| if (value == 0) { |
| dev->configuration = 0; |
| dev->ninterfaces = 0; |
| dev->config = NULL; |
| } else { |
| for (i = 0; i < dev->device->bNumConfigurations; i++) { |
| if (dev->device->confs[i].bConfigurationValue == value) { |
| dev->configuration = value; |
| dev->ninterfaces = dev->device->confs[i].bNumInterfaces; |
| dev->config = dev->device->confs + i; |
| assert(dev->ninterfaces <= USB_MAX_INTERFACES); |
| } |
| } |
| if (i < dev->device->bNumConfigurations) { |
| return -1; |
| } |
| } |
| |
| for (i = 0; i < dev->ninterfaces; i++) { |
| usb_desc_set_interface(dev, i, 0); |
| } |
| for (; i < USB_MAX_INTERFACES; i++) { |
| dev->altsetting[i] = 0; |
| dev->ifaces[i] = NULL; |
| } |
| |
| return 0; |
| } |
| |
| static void usb_desc_setdefaults(USBDevice *dev) |
| { |
| const USBDesc *desc = dev->info->usb_desc; |
| |
| assert(desc != NULL); |
| 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; |
| } |
| usb_desc_set_config(dev, 0); |
| } |
| |
| void usb_desc_init(USBDevice *dev) |
| { |
| const USBDesc *desc = dev->info->usb_desc; |
| |
| assert(desc != NULL); |
| dev->speed = USB_SPEED_FULL; |
| dev->speedmask = 0; |
| if (desc->full) { |
| dev->speedmask |= USB_SPEED_MASK_FULL; |
| } |
| if (desc->high) { |
| dev->speedmask |= USB_SPEED_MASK_HIGH; |
| } |
| 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; |
| |
| QLIST_FOREACH(s, &dev->strings, next) { |
| if (s->index == index) { |
| break; |
| } |
| } |
| if (s == NULL) { |
| s = g_malloc0(sizeof(*s)); |
| s->index = index; |
| QLIST_INSERT_HEAD(&dev->strings, s, next); |
| } |
| g_free(s->str); |
| s->str = g_strdup(str); |
| } |
| |
| const char *usb_desc_get_string(USBDevice *dev, uint8_t index) |
| { |
| USBDescString *s; |
| |
| QLIST_FOREACH(s, &dev->strings, next) { |
| if (s->index == index) { |
| return s->str; |
| } |
| } |
| return NULL; |
| } |
| |
| int usb_desc_string(USBDevice *dev, int index, uint8_t *dest, size_t len) |
| { |
| uint8_t bLength, pos, i; |
| const char *str; |
| |
| if (len < 4) { |
| return -1; |
| } |
| |
| if (index == 0) { |
| /* language ids */ |
| dest[0] = 4; |
| dest[1] = USB_DT_STRING; |
| dest[2] = 0x09; |
| dest[3] = 0x04; |
| return 4; |
| } |
| |
| str = usb_desc_get_string(dev, index); |
| if (str == NULL) { |
| str = dev->info->usb_desc->str[index]; |
| if (str == NULL) { |
| return 0; |
| } |
| } |
| |
| bLength = strlen(str) * 2 + 2; |
| dest[0] = bLength; |
| dest[1] = USB_DT_STRING; |
| i = 0; pos = 2; |
| while (pos+1 < bLength && pos+1 < len) { |
| dest[pos++] = str[i++]; |
| dest[pos++] = 0; |
| } |
| return pos; |
| } |
| |
| 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)); |
| trace_usb_desc_device(dev->addr, len, ret); |
| break; |
| case USB_DT_CONFIG: |
| if (index < dev->device->bNumConfigurations) { |
| ret = usb_desc_config(dev->device->confs + index, buf, sizeof(buf)); |
| } |
| trace_usb_desc_config(dev->addr, index, len, ret); |
| break; |
| case USB_DT_STRING: |
| 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; |
| |
| case USB_DT_DEBUG: |
| /* ignore silently */ |
| break; |
| |
| default: |
| fprintf(stderr, "%s: %d unknown type %d (len %zd)\n", __FUNCTION__, |
| dev->addr, type, len); |
| break; |
| } |
| |
| if (ret > 0) { |
| if (ret > len) { |
| ret = len; |
| } |
| memcpy(dest, buf, ret); |
| } |
| return ret; |
| } |
| |
| int usb_desc_handle_control(USBDevice *dev, USBPacket *p, |
| int request, int value, int index, int length, uint8_t *data) |
| { |
| const USBDesc *desc = dev->info->usb_desc; |
| int ret = -1; |
| |
| assert(desc != NULL); |
| switch(request) { |
| case DeviceOutRequest | USB_REQ_SET_ADDRESS: |
| dev->addr = value; |
| trace_usb_set_addr(dev->addr); |
| ret = 0; |
| break; |
| |
| case DeviceRequest | USB_REQ_GET_DESCRIPTOR: |
| ret = usb_desc_get_descriptor(dev, value, data, length); |
| break; |
| |
| case DeviceRequest | USB_REQ_GET_CONFIGURATION: |
| data[0] = dev->config->bConfigurationValue; |
| ret = 1; |
| break; |
| case DeviceOutRequest | USB_REQ_SET_CONFIGURATION: |
| ret = usb_desc_set_config(dev, value); |
| trace_usb_set_config(dev->addr, value, ret); |
| break; |
| |
| case DeviceRequest | USB_REQ_GET_STATUS: |
| data[0] = 0; |
| if (dev->config->bmAttributes & 0x40) { |
| data[0] |= 1 << USB_DEVICE_SELF_POWERED; |
| } |
| if (dev->remote_wakeup) { |
| data[0] |= 1 << USB_DEVICE_REMOTE_WAKEUP; |
| } |
| data[1] = 0x00; |
| ret = 2; |
| break; |
| case DeviceOutRequest | USB_REQ_CLEAR_FEATURE: |
| if (value == USB_DEVICE_REMOTE_WAKEUP) { |
| dev->remote_wakeup = 0; |
| ret = 0; |
| } |
| trace_usb_clear_device_feature(dev->addr, value, ret); |
| break; |
| case DeviceOutRequest | USB_REQ_SET_FEATURE: |
| if (value == USB_DEVICE_REMOTE_WAKEUP) { |
| dev->remote_wakeup = 1; |
| ret = 0; |
| } |
| trace_usb_set_device_feature(dev->addr, value, ret); |
| break; |
| |
| case InterfaceRequest | USB_REQ_GET_INTERFACE: |
| if (index < 0 || index >= dev->ninterfaces) { |
| break; |
| } |
| data[0] = dev->altsetting[index]; |
| ret = 1; |
| break; |
| case InterfaceOutRequest | USB_REQ_SET_INTERFACE: |
| ret = usb_desc_set_interface(dev, index, value); |
| trace_usb_set_interface(dev->addr, index, value, ret); |
| break; |
| |
| } |
| return ret; |
| } |
