RDNIS skeleton

CMakeLists.txt

@@ -22,7 +22,7 @@ add_compile_definitions(
         DEBUG
         TARGETS=stm32/f1
 )
-add_executable(usbtest src/main.c src/util.c src/cdcacm.c)
+add_executable(usbtest src/main.c src/util.c src/cdcacm.c src/rndis.c src/rndis.h)
 
 set_target_properties(usbtest PROPERTIES SUFFIX .elf)
 

openocd/stlink.cfg

@@ -2,7 +2,7 @@
 source [find interface/stlink.cfg]
 source [find target/stm32f1x.cfg]
 
-#reset_config srst_only
+reset_config combined
 
 # Search for RTT string from start of RAM
 rtt setup 0x20000000 8192 "SEGGER RTT"

src/cdcacm.c

@@ -18,8 +18,6 @@
  */
 
 #include <stdlib.h>
-#include <libopencm3/stm32/rcc.h>
-#include <libopencm3/stm32/gpio.h>
 #include <libopencm3/usb/usbd.h>
 #include <libopencm3/usb/cdc.h>
 
@@ -168,7 +166,7 @@ static const char *usb_strings[] = {
 };
 
 /* Buffer to be used for control requests. */
-uint8_t usbd_control_buffer[128];
+static uint8_t usbd_control_buffer[128];
 
 static enum usbd_request_return_codes cdcacm_control_request(usbd_device *usbd_dev, struct usb_setup_data *req, uint8_t **buf,
                 uint16_t *len, void (**complete)(usbd_device *usbd_dev, struct usb_setup_data *req))
@@ -238,46 +236,15 @@ static void cdcacm_set_config(usbd_device *usbd_dev, uint16_t wValue)
                                 cdcacm_control_request);
 }
 
-void start_cdcacm(void) {
-    int i;
-
+usbd_device *start_cdcacm(void) {
     usbd_device *usbd_dev;
 
-    //SCB_VTOR = (uint32_t) 0x08005000;
+    SEGGER_RTT_printf(0, "Configuring USB CDC-ACM device\n");
 
-    rcc_clock_setup_pll(&rcc_hse_configs[RCC_CLOCK_HSE8_72MHZ]);
-
-    rcc_periph_clock_enable(RCC_GPIOB);
-
-
-    /* Setup GPIOB Pin 9 to pull up the D+ high, so autodect works
-     * with the bootloader.  The circuit is active high. */
-    gpio_set_mode(GPIOB, GPIO_MODE_OUTPUT_2_MHZ,
-                  GPIO_CNF_OUTPUT_OPENDRAIN, GPIO9);
-    gpio_set(GPIOB, GPIO9);
-
-    /* Setup GPIOB Pin 1 for the LED */
-    gpio_set(GPIOB, GPIO1);
-    gpio_set_mode(GPIOB, GPIO_MODE_OUTPUT_2_MHZ,
-                  GPIO_CNF_OUTPUT_PUSHPULL, GPIO1);
-
-    SEGGER_RTT_printf(0, "Starting USB\n");
-
-    rcc_periph_clock_enable(RCC_AFIO);
-    rcc_periph_clock_enable(RCC_OTGFS);
     usbd_dev = usbd_init(&st_usbfs_v1_usb_driver, &dev, &config,
                          usb_strings, 3,
                          usbd_control_buffer, sizeof(usbd_control_buffer));
     usbd_register_set_config_callback(usbd_dev, cdcacm_set_config);
 
-    for (i = 0; i < 0x800000; i++)
-            __asm__("nop");
-    gpio_clear(GPIOB, GPIO9);
-
-    SEGGER_RTT_printf(0, "Main loop\n");
-
-    while (1) {
-        usbd_poll(usbd_dev);
-        gpio_toggle(GPIOB, GPIO1);
-    }
+    return usbd_dev;
 }

src/cdcacm.h

@@ -1,6 +1,6 @@
 #ifndef USBTEST_CDCACM_H
 
-void start_cdcacm(void);
+usbd_device *start_cdcacm(void);
 
 #define USBTEST_CDCACM_H
 

src/main.c

@@ -1,8 +1,48 @@
+#include <libopencm3/stm32/rcc.h>
+#include <libopencm3/stm32/gpio.h>
+#include <libopencm3/usb/usbd.h>
+
 #include <SEGGER_RTT.h>
 #include "cdcacm.h"
+#include "rndis.h"
 
 int main(void) {
+    usbd_device *usbd_dev;
+
+
     SEGGER_RTT_printf(0, "Hello World\n");
-    start_cdcacm();
+
+    rcc_clock_setup_pll(&rcc_hse_configs[RCC_CLOCK_HSE8_72MHZ]);
+
+    rcc_periph_clock_enable(RCC_GPIOB);
+
+
+    /* Setup GPIOB Pin 9 to pull up the D+ high, so autodect works
+     * with the bootloader.  The circuit is active high. */
+    gpio_set_mode(GPIOB, GPIO_MODE_OUTPUT_2_MHZ,
+                  GPIO_CNF_OUTPUT_OPENDRAIN, GPIO9);
+
+    /* Setup GPIOB Pin 1 for the LED */
+    gpio_set(GPIOB, GPIO1);
+    gpio_set_mode(GPIOB, GPIO_MODE_OUTPUT_2_MHZ,
+                  GPIO_CNF_OUTPUT_PUSHPULL, GPIO1);
+
+    SEGGER_RTT_printf(0, "Starting USB\n");
+
+    rcc_periph_clock_enable(RCC_AFIO);
+    rcc_periph_clock_enable(RCC_OTGFS);
+
+
+    usbd_dev = start_rdnis();
+
+
+    SEGGER_RTT_printf(0, "Main loop\n");
+
+    while (1) {
+        usbd_poll(usbd_dev);
+        gpio_toggle(GPIOB, GPIO1);
+    }
+
+
     return 0;
 }

src/rndis.c

@@ -0,0 +1,158 @@
+#include <stdlib.h>
+#include <libopencm3/usb/usbd.h>
+#include <libopencm3/usb/cdc.h>
+
+#include <SEGGER_RTT.h>
+
+#include "rndis.h"
+
+/* Buffer to be used for control requests. */
+static uint8_t usbd_control_buffer[128];
+
+static const struct usb_device_descriptor dev = {
+        .bLength = USB_DT_DEVICE_SIZE,
+        .bDescriptorType = USB_DT_DEVICE,
+        .bcdUSB = 0x0200,
+        .bDeviceClass = 0xE0,  // Wireless Controller
+        .bDeviceSubClass = 0,
+        .bDeviceProtocol = 0,
+        .bMaxPacketSize0 = 64,
+        .idVendor = 0x4E44,
+        .idProduct = 0x4953,
+        .bcdDevice = 0xffff,
+        .iManufacturer = 1,
+        .iProduct = 2,
+        .iSerialNumber = 3,
+        .bNumConfigurations = 1,
+};
+
+static const struct usb_endpoint_descriptor comm_endp[] = {{
+    .bLength = USB_DT_ENDPOINT_SIZE,
+    .bDescriptorType = USB_DT_ENDPOINT,
+    .bEndpointAddress = 0x81,
+    .bmAttributes = USB_ENDPOINT_ATTR_INTERRUPT,
+    .wMaxPacketSize = 8,
+    .bInterval = 255,
+}};
+
+static const struct {
+    struct usb_cdc_header_descriptor header;
+    struct usb_cdc_call_management_descriptor call_mgmt;
+    struct usb_cdc_acm_descriptor acm;
+    struct usb_cdc_union_descriptor cdc_union;
+} __attribute__((packed)) cdcacm_functional_descriptors = {
+        .header = {
+                .bFunctionLength = sizeof(struct usb_cdc_header_descriptor),
+                .bDescriptorType = CS_INTERFACE,
+                .bDescriptorSubtype = USB_CDC_TYPE_HEADER,
+                .bcdCDC = 0x0110,
+        },
+        .call_mgmt = {
+                .bFunctionLength =
+                sizeof(struct usb_cdc_call_management_descriptor),
+                .bDescriptorType = CS_INTERFACE,
+                .bDescriptorSubtype = USB_CDC_TYPE_CALL_MANAGEMENT,
+                .bmCapabilities = 0,
+                .bDataInterface = 1,
+        },
+        .acm = {
+                .bFunctionLength = sizeof(struct usb_cdc_acm_descriptor),
+                .bDescriptorType = CS_INTERFACE,
+                .bDescriptorSubtype = USB_CDC_TYPE_ACM,
+                .bmCapabilities = 0,
+        },
+        .cdc_union = {
+                .bFunctionLength = sizeof(struct usb_cdc_union_descriptor),
+                .bDescriptorType = CS_INTERFACE,
+                .bDescriptorSubtype = USB_CDC_TYPE_UNION,
+                .bControlInterface = 0,
+                .bSubordinateInterface0 = 1,
+        },
+};
+
+// RNDIS Communications Control
+static const struct usb_interface_descriptor comm_iface[] = {{
+    .bLength = USB_DT_INTERFACE_SIZE,
+    .bDescriptorType = USB_DT_INTERFACE,
+    .bInterfaceNumber = 0,
+    .bAlternateSetting = 0,
+    .bNumEndpoints = 1,
+    .bInterfaceClass = 0xE0,  // Wireless Controller
+    .bInterfaceSubClass = 0x01,
+    .bInterfaceProtocol = 0x03,
+    .iInterface = 0,
+
+    .endpoint = comm_endp,
+
+    .extra = &cdcacm_functional_descriptors,
+    .extralen = sizeof(cdcacm_functional_descriptors),
+}};
+
+static const struct usb_endpoint_descriptor data_endp[] = {{
+   .bLength = USB_DT_ENDPOINT_SIZE,
+   .bDescriptorType = USB_DT_ENDPOINT,
+   .bEndpointAddress = 0x01,
+   .bmAttributes = USB_ENDPOINT_ATTR_BULK,
+   .wMaxPacketSize = 64,
+   .bInterval = 0,
+}, {
+   .bLength = USB_DT_ENDPOINT_SIZE,
+   .bDescriptorType = USB_DT_ENDPOINT,
+   .bEndpointAddress = 0x82,
+   .bmAttributes = USB_ENDPOINT_ATTR_BULK,
+   .wMaxPacketSize = 64,
+   .bInterval = 0,
+}};
+
+static const struct usb_interface_descriptor data_iface[] = {{
+    .bLength = USB_DT_INTERFACE_SIZE,
+    .bDescriptorType = USB_DT_INTERFACE,
+    .bInterfaceNumber = 1,
+    .bAlternateSetting = 0,
+    .bNumEndpoints = 2,
+    .bInterfaceClass = USB_CLASS_DATA,
+    .bInterfaceSubClass = 0,
+    .bInterfaceProtocol = 0,
+    .iInterface = 0,
+
+    .endpoint = data_endp,
+}};
+
+static const struct usb_interface ifaces[] = {{
+    .num_altsetting = 1,
+    .altsetting = comm_iface,
+}, {
+    .num_altsetting = 1,
+    .altsetting = data_iface,
+}};
+
+static const struct usb_config_descriptor config = {
+        .bLength = USB_DT_CONFIGURATION_SIZE,
+        .bDescriptorType = USB_DT_CONFIGURATION,
+        .wTotalLength = 0,
+        .bNumInterfaces = 2,
+        .bConfigurationValue = 1,
+        .iConfiguration = 0,
+        .bmAttributes = 0x80,
+        .bMaxPower = 0x32,
+
+        .interface = ifaces,
+};
+
+static const char *usb_strings[] = {
+        "Arti Zirk",  // iManufacturer
+        "STM32-RNDIS",  // iProduct
+        "lrndis demo",  // iSerialNumber
+};
+
+usbd_device *start_rdnis(void) {
+    usbd_device *usb_dev;
+
+    usb_dev = usbd_init(
+            &st_usbfs_v1_usb_driver, &dev, &config,
+            usb_strings, 3,
+            usbd_control_buffer, sizeof(usbd_control_buffer)
+    );
+
+    return usb_dev;
+}

src/rndis.h

@@ -0,0 +1,7 @@
+#ifndef USBTEST_RNDIS_H
+#define USBTEST_RNDIS_H
+
+usbd_device *start_rdnis(void);
+
+
+#endif //USBTEST_RNDIS_H

src/util.c

@@ -1,4 +1,7 @@
+#include <libopencm3/stm32/gpio.h>
+
 #include <SEGGER_RTT.h>
+#include "delay.h"
 #include "util.h"
 
 void hexdump(char *buf, size_t size, uint32_t width) {
@@ -15,3 +18,10 @@ void hexdump(char *buf, size_t size, uint32_t width) {
     SEGGER_RTT_printf(0,"\n");
     SEGGER_RTT_SetFlagsUpBuffer(0, SEGGER_RTT_MODE_DEFAULT);
 }
+
+
+void reset_usb_bus(void) {
+    gpio_set(GPIOB, GPIO9);
+    delay_ms(10);
+    gpio_clear(GPIOB, GPIO9);
+}

src/util.h

@@ -4,5 +4,6 @@
 #include <stdint.h>
 
 void hexdump(char *buf, size_t size, uint32_t width);
+void reset_usb_bus(void);
 
 #endif //DHT_TEST_UTIL_H