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-rw-r--r--src/drivers/usb.c55
-rw-r--r--src/drivers/usb.h15
2 files changed, 70 insertions, 0 deletions
diff --git a/src/drivers/usb.c b/src/drivers/usb.c
new file mode 100644
index 0000000..c6aa02d
--- /dev/null
+++ b/src/drivers/usb.c
@@ -0,0 +1,55 @@
+#include "../drivers/usb.h"
+#include "../sys/core.h"
+
+#define DRIVERS_USB_C
+unsigned char usb_buffer0[256] = {0};
+unsigned char usb_buffer1[256] = {0};
+
+static struct UsbDeviceRequest udr = {
+ .Type = 0xA0, // DEVICE_TO_HOST | STDANDAD | DEVICE
+ .Request = 0x06, // GET_DESCRIPTOR
+ .Value = 0x0100, // descriptor.type = 0x01, decriptor.index = 0x00
+ .Index = 0,
+ .Length = 64,
+};
+
+void my_memcpy(void *dest, void *src, unsigned int n) {
+ char *src_char = (char *)src;
+ char *dest_char = (char *)dest;
+ for (unsigned int i=0; i<n; i++) {
+ dest_char[i] = src_char[i];
+ }
+}
+
+static void txrx_control_msg(uint8_t txlen)
+{
+ // send setup & control packet
+ // set dma buffer
+ *USB_HOST_HCDMA0 = (unsigned long long) usb_buffer0;
+ *USB_HOST_HCDMA0 |= 0xC0000000;
+ // HCTSIZ0.Pid = 2'd3 (SETUP) , HCTSIZ0.PktCnt = 10'h1 , HCTSIZ0.XferSize = 18'd8
+ *USB_HOST_HCTSIZ0 = 3 << 29 | 1 << 19 | txlen;
+ // HCCAR1.ChEna = 1'b1
+ *USB_HOST_HCCHAR0 |= 1<<31;
+
+ // recieve control packet
+ // set dma buffer
+ *USB_HOST_HCDMA1 = (unsigned long long) usb_buffer1;
+ *USB_HOST_HCDMA1 |= 0xC0000000;
+ // HCTSIZ1.Pid = 2'd2 (DATA1) , HCTSIZ1.PktCnt = 10'h1 , HCTSIZ1.XferSize = 18'd64
+ *USB_HOST_HCTSIZ1 = 2 << 29 | 1 << 19 | 64;
+ // HCCAR1.ChEna = 1'b1
+ *USB_HOST_HCCHAR1 |= 1<<31;
+}
+
+void send_packet(void)
+{
+ // HCCAR1.EPDir = 1'b0 (OUT) / 1'b01(IN), HCCAR1.MPS = 11'h40
+ *USB_HOST_HCCHAR0 |= 0x40; // OUT
+ *USB_HOST_HCCHAR1 |= 1 << 15 | 0x40; // IN
+
+ // build packet
+ my_memcpy(usb_buffer0, &udr, 8);
+
+ txrx_control_msg(8);
+}
diff --git a/src/drivers/usb.h b/src/drivers/usb.h
new file mode 100644
index 0000000..abe0133
--- /dev/null
+++ b/src/drivers/usb.h
@@ -0,0 +1,15 @@
+#ifndef DRIVERS_USB_H
+#define DRIVERS_USB_H
+
+#ifndef DRIVERS_USB_C
+extern unsigned char usb_buffer0[256];
+extern unsigned char usb_buffer1[256];
+#endif
+
+#define uint8_t unsigned char
+#define uint16_t unsigned short
+#define uint32_t unsigned long
+
+void send_packet(void);
+
+#endif