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-rw-r--r--hw/usb-desc.c238
-rw-r--r--hw/usb-desc.h86
-rw-r--r--hw/usb.h9
3 files changed, 333 insertions, 0 deletions
diff --git a/hw/usb-desc.c b/hw/usb-desc.c
new file mode 100644
index 0000000000..559ced78b9
--- /dev/null
+++ b/hw/usb-desc.c
@@ -0,0 +1,238 @@
+#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_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;
+}
+
+int usb_desc_string(const char* const *str, int index, uint8_t *dest, size_t len)
+{
+ uint8_t bLength, pos, i;
+
+ 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;
+ }
+
+ if (str[index] == NULL) {
+ return 0;
+ }
+ bLength = strlen(str[index]) * 2 + 2;
+ dest[0] = bLength;
+ dest[1] = USB_DT_STRING;
+ i = 0; pos = 2;
+ while (pos+1 < bLength && pos+1 < len) {
+ dest[pos++] = str[index][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;
+ uint8_t buf[256];
+ uint8_t type = value >> 8;
+ uint8_t index = value & 0xff;
+ int ret = -1;
+
+ switch(type) {
+ case USB_DT_DEVICE:
+ ret = usb_desc_device(&desc->id, desc->full, buf, sizeof(buf));
+ trace_usb_desc_device(dev->addr, len, ret);
+ break;
+ case USB_DT_CONFIG:
+ if (index < desc->full->bNumConfigurations) {
+ ret = usb_desc_config(desc->full->confs + index, buf, sizeof(buf));
+ }
+ trace_usb_desc_config(dev->addr, index, len, ret);
+ break;
+ case USB_DT_STRING:
+ ret = usb_desc_string(desc->str, index, buf, sizeof(buf));
+ trace_usb_desc_string(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 ret = -1;
+
+ assert(desc != NULL);
+ switch(request) {
+ case DeviceRequest | USB_REQ_GET_DESCRIPTOR:
+ ret = usb_desc_get_descriptor(dev, value, data, length);
+ break;
+ }
+ return ret;
+}
diff --git a/hw/usb-desc.h b/hw/usb-desc.h
new file mode 100644
index 0000000000..d80efdb24f
--- /dev/null
+++ b/hw/usb-desc.h
@@ -0,0 +1,86 @@
+#ifndef QEMU_HW_USB_DESC_H
+#define QEMU_HW_USB_DESC_H
+
+#include <inttypes.h>
+
+struct USBDescID {
+ uint16_t idVendor;
+ uint16_t idProduct;
+ uint16_t bcdDevice;
+ uint8_t iManufacturer;
+ uint8_t iProduct;
+ uint8_t iSerialNumber;
+};
+
+struct USBDescDevice {
+ uint16_t bcdUSB;
+ uint8_t bDeviceClass;
+ uint8_t bDeviceSubClass;
+ uint8_t bDeviceProtocol;
+ uint8_t bMaxPacketSize0;
+ uint8_t bNumConfigurations;
+
+ const USBDescConfig *confs;
+};
+
+struct USBDescConfig {
+ uint8_t bNumInterfaces;
+ uint8_t bConfigurationValue;
+ uint8_t iConfiguration;
+ uint8_t bmAttributes;
+ uint8_t bMaxPower;
+
+ uint8_t nif;
+ const USBDescIface *ifs;
+};
+
+struct USBDescIface {
+ uint8_t bInterfaceNumber;
+ uint8_t bAlternateSetting;
+ uint8_t bNumEndpoints;
+ uint8_t bInterfaceClass;
+ uint8_t bInterfaceSubClass;
+ uint8_t bInterfaceProtocol;
+ uint8_t iInterface;
+
+ uint8_t ndesc;
+ USBDescOther *descs;
+ USBDescEndpoint *eps;
+};
+
+struct USBDescEndpoint {
+ uint8_t bEndpointAddress;
+ uint8_t bmAttributes;
+ uint16_t wMaxPacketSize;
+ uint8_t bInterval;
+};
+
+struct USBDescOther {
+ uint8_t length;
+ uint8_t *data;
+};
+
+typedef const char *USBDescStrings[256];
+
+struct USBDesc {
+ USBDescID id;
+ const USBDescDevice *full;
+ const USBDescDevice *high;
+ const char* const *str;
+};
+
+/* generate usb packages from structs */
+int usb_desc_device(const USBDescID *id, const USBDescDevice *dev,
+ uint8_t *dest, size_t len);
+int usb_desc_config(const USBDescConfig *conf, uint8_t *dest, size_t len);
+int usb_desc_iface(const USBDescIface *iface, uint8_t *dest, size_t len);
+int usb_desc_endpoint(const USBDescEndpoint *ep, uint8_t *dest, size_t len);
+int usb_desc_other(const USBDescOther *desc, uint8_t *dest, size_t len);
+int usb_desc_string(const char* const *str, int index, uint8_t *dest, size_t len);
+
+/* control message emulation helpers */
+int usb_desc_get_descriptor(USBDevice *dev, int value, uint8_t *dest, size_t len);
+int usb_desc_handle_control(USBDevice *dev, int request, int value,
+ int index, int length, uint8_t *data);
+
+#endif /* QEMU_HW_USB_DESC_H */
diff --git a/hw/usb.h b/hw/usb.h
index 0b32d77e6f..a29b6d6d8f 100644
--- a/hw/usb.h
+++ b/hw/usb.h
@@ -128,6 +128,14 @@ typedef struct USBDevice USBDevice;
typedef struct USBDeviceInfo USBDeviceInfo;
typedef struct USBPacket USBPacket;
+typedef struct USBDesc USBDesc;
+typedef struct USBDescID USBDescID;
+typedef struct USBDescDevice USBDescDevice;
+typedef struct USBDescConfig USBDescConfig;
+typedef struct USBDescIface USBDescIface;
+typedef struct USBDescEndpoint USBDescEndpoint;
+typedef struct USBDescOther USBDescOther;
+
/* definition of a USB device */
struct USBDevice {
DeviceState qdev;
@@ -190,6 +198,7 @@ struct USBDeviceInfo {
int (*handle_data)(USBDevice *dev, USBPacket *p);
const char *product_desc;
+ const USBDesc *usb_desc;
/* handle legacy -usbdevice command line options */
const char *usbdevice_name;
generated by cgit v1.2.3 (git 2.26.2) at 2024-12-23 14:41:30 +0000