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-rw-r--r--hw/usb-desc.c406
1 files changed, 406 insertions, 0 deletions
diff --git a/hw/usb-desc.c b/hw/usb-desc.c
new file mode 100644
index 0000000000..62591f20aa
--- /dev/null
+++ b/hw/usb-desc.c
@@ -0,0 +1,406 @@
+#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, count;
+
+ 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;
+
+ count = conf->nif ? conf->nif : conf->bNumInterfaces;
+ for (i = 0; i < count; 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(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 = 0x07;
+
+ if (len < bLength) {
+ 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;
+
+ return bLength;
+}
+
+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_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;
+ }
+ dev->config = dev->device->confs;
+}
+
+void usb_desc_init(USBDevice *dev)
+{
+ dev->speed = USB_SPEED_FULL;
+ 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 = qemu_mallocz(sizeof(*s));
+ s->index = index;
+ QLIST_INSERT_HEAD(&dev->strings, s, next);
+ }
+ qemu_free(s->str);
+ s->str = qemu_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;
+
+ 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, int request, int value,
+ int index, int length, uint8_t *data)
+{
+ const USBDesc *desc = dev->info->usb_desc;
+ int i, 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:
+ for (i = 0; i < dev->device->bNumConfigurations; i++) {
+ if (dev->device->confs[i].bConfigurationValue == value) {
+ dev->config = dev->device->confs + i;
+ ret = 0;
+ }
+ }
+ 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;
+ }
+ return ret;
+}
generated by cgit v1.2.3 (git 2.26.2) at 2025-01-03 01:10:30 +0000