From 39687aa7c7b138d2a1ce2551f2400bade3b1a6fb Mon Sep 17 00:00:00 2001
From: James McKenzie <git@madingley.org>
Date: Sun, 2 Aug 2015 23:30:06 +0100
Subject: fis

---
 app/usb.c | 170 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 170 insertions(+)
 create mode 100644 app/usb.c

(limited to 'app/usb.c')

diff --git a/app/usb.c b/app/usb.c
new file mode 100644
index 0000000..ea03f2a
--- /dev/null
+++ b/app/usb.c
@@ -0,0 +1,170 @@
+#include "project.h"
+
+/* Define this to include the DFU APP interface. */
+const struct usb_device_descriptor dev = {
+  .bLength = USB_DT_DEVICE_SIZE,
+  .bDescriptorType = USB_DT_DEVICE,
+  .bcdUSB = 0x0200,
+  .bDeviceClass = 0,
+  .bDeviceSubClass = 0,
+  .bDeviceProtocol = 0,
+  .bMaxPacketSize0 = 64,
+  .idVendor = 0x1d6b,
+  .idProduct = 0x1932,
+  .bcdDevice = 0x0200,
+  .iManufacturer = 1,
+  .iProduct = 2,
+  .iSerialNumber = 3,
+  .bNumConfigurations = 1,
+};
+
+const struct usb_interface ifaces[] = {
+  {
+   .num_altsetting = 1,
+   .altsetting = &crypto_iface,
+   },
+  {
+   .num_altsetting = 1,
+   .altsetting = &dfu_iface,
+   },
+};
+
+const struct usb_config_descriptor config = {
+  .bLength = USB_DT_CONFIGURATION_SIZE,
+  .bDescriptorType = USB_DT_CONFIGURATION,
+  .wTotalLength = 0,
+  .bNumInterfaces = 2,
+  .bConfigurationValue = 1,
+  .iConfiguration = 4,
+  .bmAttributes = 0xa0,
+  .bMaxPower = 0x31,
+
+  .interface = ifaces,
+};
+
+static const char *usb_strings[] = {
+  "bootpad",
+  "bootpad",
+  "bootpad",
+  "composite",
+  "bootpad",
+  "bootpad dfu device",
+};
+
+
+
+usbd_device *usbd_dev;
+
+
+int usb_is_suspended = 0;
+
+static void
+usb_suspended (void)
+{
+  *USB_CNTR_REG |= USB_CNTR_FSUSP;
+
+  usb_is_suspended = 1;
+}
+
+
+static void
+usb_resumed (void)
+{
+
+  *USB_CNTR_REG &= ~USB_CNTR_FSUSP;
+
+  usb_is_suspended = 0;
+}
+
+int
+usb_wakeup_host (void)
+{
+  if (!usb_is_suspended)
+    return 1;
+
+
+  *USB_CNTR_REG |= USB_CNTR_RESUME;
+
+  delay_us (1000);
+  delay_us (1000);
+  delay_us (1000);
+  delay_us (1000);
+  delay_us (1000);
+
+  *USB_CNTR_REG &= ~USB_CNTR_RESUME;
+
+  return 0;
+}
+
+
+static int
+usb_control_request (usbd_device * usbd_dev, struct usb_setup_data *req,
+                     uint8_t ** buf, uint16_t * len,
+                     int (**complete) (usbd_device * usbd_dev,
+                                       struct usb_setup_data * req))
+{
+
+  (void) complete;
+  (void) usbd_dev;
+
+  if ((req->bmRequestType != 0x81) ||
+      (req->bRequest != USB_REQ_GET_DESCRIPTOR) || (req->wValue != 0x2200))
+    return 0;
+
+  switch (req->wIndex)
+    {
+    case 0:
+      crypto_get_descriptor (buf, len);
+      return 1;
+    }
+
+  *len = 0;
+  return 0;
+}
+
+
+void
+usb_set_config (usbd_device * usbd_dev, uint16_t wValue)
+{
+  (void) wValue;
+  (void) usbd_dev;
+
+  usbd_ep_setup (usbd_dev, 0x81, USB_ENDPOINT_ATTR_INTERRUPT, 4, NULL);
+
+  usbd_register_control_callback (usbd_dev,
+                                  USB_REQ_TYPE_STANDARD |
+                                  USB_REQ_TYPE_INTERFACE,
+                                  USB_REQ_TYPE_TYPE | USB_REQ_TYPE_RECIPIENT,
+                                  usb_control_request);
+
+  usbd_register_control_callback (usbd_dev,
+                                  USB_REQ_TYPE_CLASS | USB_REQ_TYPE_INTERFACE,
+                                  USB_REQ_TYPE_TYPE | USB_REQ_TYPE_RECIPIENT,
+                                  dfu_control_request);
+
+
+}
+
+/* Buffer to be used for control requests. */
+static uint8_t usbd_control_buffer[128];
+
+void
+usb_init (void)
+{
+
+  usbd_dev =
+    usbd_init (&stm32f103_usb_driver, &dev, &config, usb_strings, 8,
+               usbd_control_buffer, sizeof (usbd_control_buffer));
+
+  usbd_register_set_config_callback (usbd_dev, usb_set_config);
+  usbd_register_suspend_callback (usbd_dev, usb_suspended);
+  usbd_register_resume_callback (usbd_dev, usb_resumed);
+
+}
+
+void
+usb_run (void)
+{
+  for (;;)
+    usbd_poll (usbd_dev);
+}
-- 
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