602 lines
16 KiB
C
602 lines
16 KiB
C
#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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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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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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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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if (len < bLength) {
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return -1;
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}
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dest[0x00] = bLength;
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dest[0x01] = USB_DT_DEVICE;
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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] = 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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dest[0x11] = dev->bNumConfigurations;
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return bLength;
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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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if (len < bLength) {
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return -1;
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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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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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return bLength;
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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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if (len < bLength) {
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return -1;
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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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/* 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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/* 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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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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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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/* handle interface association descriptor */
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uint8_t bLength = 0x08;
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if (len < bLength) {
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return -1;
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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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/* 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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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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if (len < bLength) {
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return -1;
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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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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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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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return pos;
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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 = ep->is_audio ? 0x09 : 0x07;
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uint8_t extralen = ep->extra ? ep->extra[0] : 0;
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if (len < bLength + extralen) {
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return -1;
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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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if (ep->is_audio) {
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dest[0x07] = ep->bRefresh;
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dest[0x08] = ep->bSynchAddress;
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}
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if (ep->extra) {
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memcpy(dest + bLength, ep->extra, extralen);
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}
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return bLength + extralen;
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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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if (len < bLength) {
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return -1;
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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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static void usb_desc_ep_init(USBDevice *dev)
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{
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const USBDescIface *iface;
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int i, e, pid, ep;
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usb_ep_init(dev);
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for (i = 0; i < dev->ninterfaces; i++) {
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iface = dev->ifaces[i];
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if (iface == NULL) {
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continue;
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}
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for (e = 0; e < iface->bNumEndpoints; e++) {
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pid = (iface->eps[e].bEndpointAddress & USB_DIR_IN) ?
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USB_TOKEN_IN : USB_TOKEN_OUT;
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ep = iface->eps[e].bEndpointAddress & 0x0f;
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usb_ep_set_type(dev, pid, ep, iface->eps[e].bmAttributes & 0x03);
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usb_ep_set_ifnum(dev, pid, ep, iface->bInterfaceNumber);
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usb_ep_set_max_packet_size(dev, pid, ep,
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iface->eps[e].wMaxPacketSize);
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}
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}
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}
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static const USBDescIface *usb_desc_find_interface(USBDevice *dev,
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int nif, int alt)
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{
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const USBDescIface *iface;
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int g, i;
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if (!dev->config) {
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return NULL;
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}
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for (g = 0; g < dev->config->nif_groups; g++) {
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for (i = 0; i < dev->config->if_groups[g].nif; i++) {
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iface = &dev->config->if_groups[g].ifs[i];
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if (iface->bInterfaceNumber == nif &&
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iface->bAlternateSetting == alt) {
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return iface;
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}
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}
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}
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for (i = 0; i < dev->config->nif; i++) {
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iface = &dev->config->ifs[i];
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if (iface->bInterfaceNumber == nif &&
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iface->bAlternateSetting == alt) {
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return iface;
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}
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}
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return NULL;
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}
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static int usb_desc_set_interface(USBDevice *dev, int index, int value)
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{
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const USBDescIface *iface;
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int old;
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iface = usb_desc_find_interface(dev, index, value);
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if (iface == NULL) {
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return -1;
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}
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old = dev->altsetting[index];
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dev->altsetting[index] = value;
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dev->ifaces[index] = iface;
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usb_desc_ep_init(dev);
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if (old != value) {
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usb_device_set_interface(dev, index, old, value);
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}
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return 0;
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}
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static int usb_desc_set_config(USBDevice *dev, int value)
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{
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int i;
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if (value == 0) {
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dev->configuration = 0;
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dev->ninterfaces = 0;
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dev->config = NULL;
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} else {
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for (i = 0; i < dev->device->bNumConfigurations; i++) {
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if (dev->device->confs[i].bConfigurationValue == value) {
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dev->configuration = value;
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dev->ninterfaces = dev->device->confs[i].bNumInterfaces;
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dev->config = dev->device->confs + i;
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assert(dev->ninterfaces <= USB_MAX_INTERFACES);
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}
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}
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if (i < dev->device->bNumConfigurations) {
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return -1;
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}
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}
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for (i = 0; i < dev->ninterfaces; i++) {
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usb_desc_set_interface(dev, i, 0);
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}
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for (; i < USB_MAX_INTERFACES; i++) {
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dev->altsetting[i] = 0;
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dev->ifaces[i] = NULL;
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}
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return 0;
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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 = usb_device_get_usb_desc(dev);
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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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usb_desc_set_config(dev, 0);
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}
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void usb_desc_init(USBDevice *dev)
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{
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const USBDesc *desc = usb_device_get_usb_desc(dev);
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assert(desc != NULL);
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dev->speed = USB_SPEED_FULL;
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dev->speedmask = 0;
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if (desc->full) {
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dev->speedmask |= USB_SPEED_MASK_FULL;
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}
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if (desc->high) {
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dev->speedmask |= USB_SPEED_MASK_HIGH;
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}
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usb_desc_setdefaults(dev);
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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 = usb_device_get_usb_desc(dev);
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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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usb_device_get_product_desc(dev));
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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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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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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 = g_malloc0(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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g_free(s->str);
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s->str = g_strdup(str);
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}
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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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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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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;
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if (len < 4) {
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return -1;
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}
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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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str = usb_desc_get_string(dev, index);
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if (str == NULL) {
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str = usb_device_get_usb_desc(dev)->str[index];
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if (str == NULL) {
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return 0;
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}
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}
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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++];
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dest[pos++] = 0;
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}
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return pos;
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}
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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 = usb_device_get_usb_desc(dev);
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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;
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if (dev->speed == USB_SPEED_HIGH) {
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other_dev = usb_device_get_usb_desc(dev)->full;
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} else {
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other_dev = usb_device_get_usb_desc(dev)->high;
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}
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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);
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break;
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case USB_DT_CONFIG:
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if (index < dev->device->bNumConfigurations) {
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ret = usb_desc_config(dev->device->confs + index, buf, sizeof(buf));
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}
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trace_usb_desc_config(dev->addr, index, len, ret);
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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);
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break;
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case USB_DT_DEVICE_QUALIFIER:
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if (other_dev != NULL) {
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ret = usb_desc_device_qualifier(other_dev, buf, sizeof(buf));
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}
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trace_usb_desc_device_qualifier(dev->addr, len, ret);
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break;
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case USB_DT_OTHER_SPEED_CONFIG:
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if (other_dev != NULL && index < other_dev->bNumConfigurations) {
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ret = usb_desc_config(other_dev->confs + index, buf, sizeof(buf));
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buf[0x01] = USB_DT_OTHER_SPEED_CONFIG;
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}
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trace_usb_desc_other_speed_config(dev->addr, index, len, ret);
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break;
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case USB_DT_DEBUG:
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/* ignore silently */
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break;
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default:
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fprintf(stderr, "%s: %d unknown type %d (len %zd)\n", __FUNCTION__,
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dev->addr, type, len);
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break;
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}
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if (ret > 0) {
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if (ret > len) {
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ret = len;
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}
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memcpy(dest, buf, ret);
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}
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return ret;
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}
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int usb_desc_handle_control(USBDevice *dev, USBPacket *p,
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int request, int value, int index, int length, uint8_t *data)
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{
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const USBDesc *desc = usb_device_get_usb_desc(dev);
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int ret = -1;
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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:
|
|
/*
|
|
* 9.4.2: 0 should be returned if the device is unconfigured, otherwise
|
|
* the non zero value of bConfigurationValue.
|
|
*/
|
|
data[0] = dev->config ? dev->config->bConfigurationValue : 0;
|
|
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: {
|
|
const USBDescConfig *config = dev->config ?
|
|
dev->config : &dev->device->confs[0];
|
|
|
|
data[0] = 0;
|
|
/*
|
|
* Default state: Device behavior when this request is received while
|
|
* the device is in the Default state is not specified.
|
|
* We return the same value that a configured device would return if
|
|
* it used the first configuration.
|
|
*/
|
|
if (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;
|
|
}
|