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#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 = 0x07;
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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_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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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_setdefaults(USBDevice *dev)
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{
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    const USBDesc *desc = dev->info->usb_desc;
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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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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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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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    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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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 = 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);
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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 = dev->info->usb_desc->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 = 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;
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    if (dev->speed == USB_SPEED_HIGH) {
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        other_dev = dev->info->usb_desc->full;
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    } else {
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        other_dev = dev->info->usb_desc->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:
371
        if (other_dev != NULL && index < other_dev->bNumConfigurations) {
372
            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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    default:
379
        fprintf(stderr, "%s: %d unknown type %d (len %zd)\n", __FUNCTION__,
380
                dev->addr, type, len);
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        break;
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    }
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384
    if (ret > 0) {
385
        if (ret > len) {
386
            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, int request, int value,
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                            int index, int length, uint8_t *data)
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{
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    const USBDesc *desc = dev->info->usb_desc;
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    int i, ret = -1;
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    assert(desc != NULL);
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    switch(request) {
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    case DeviceOutRequest | USB_REQ_SET_ADDRESS:
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        dev->addr = value;
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        trace_usb_set_addr(dev->addr);
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        ret = 0;
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        break;
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    case DeviceRequest | USB_REQ_GET_DESCRIPTOR:
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        ret = usb_desc_get_descriptor(dev, value, data, length);
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        break;
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    case DeviceRequest | USB_REQ_GET_CONFIGURATION:
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        data[0] = dev->config->bConfigurationValue;
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        ret = 1;
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        break;
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    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;
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            }
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        }
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        trace_usb_set_config(dev->addr, value, ret);
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        break;
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    case DeviceRequest | USB_REQ_GET_STATUS:
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        data[0] = 0;
427
        if (dev->config->bmAttributes & 0x40) {
428
            data[0] |= 1 << USB_DEVICE_SELF_POWERED;
429
        }
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        if (dev->remote_wakeup) {
431
            data[0] |= 1 << USB_DEVICE_REMOTE_WAKEUP;
432
        }
433
        data[1] = 0x00;
434
        ret = 2;
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        break;
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    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;
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    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
}