First upload. Untested software

2026-04-08 17:02:29 +02:00
commit 9b83763318
11 changed files with 698 additions and 0 deletions
@@ -0,0 +1,63 @@
+/* Baremetal Risc-V USB <=> Amiga Joystick/Mouse HID converter. 
+ * March 2026 - Anders Holck
+ * This software has no license. If you choose to use, please include my name :)
+*/
+
+#ifndef USB_DWC2_H
+#define USB_DWC2_H
+
+#include <stdint.h>
+
+/* System Control Registers */
+#define SYS_CTRL_BASE      0x03000000
+#define CLK_EN_1           (SYS_CTRL_BASE + 0x2004)
+#define USB_PHY_CTRL       (SYS_CTRL_BASE + 0x7000)
+
+/* USB DWC2 Register Base */
+#define USB_DWC2_BASE      0x04340000
+
+/* Global Registers */
+#define GOTGCTL            (USB_DWC2_BASE + 0x000)
+#define GOTGINT            (USB_DWC2_BASE + 0x004)
+#define GAHBCFG            (USB_DWC2_BASE + 0x008)
+#define GUSBCFG            (USB_DWC2_BASE + 0x00C)
+#define GRSTCTL            (USB_DWC2_BASE + 0x010)
+#define GINTSTS            (USB_DWC2_BASE + 0x014)
+#define GINTMSK            (USB_DWC2_BASE + 0x018)
+#define GRXSTSR            (USB_DWC2_BASE + 0x01C)
+#define GRXSTSP            (USB_DWC2_BASE + 0x020)
+#define GRXFSIZ            (USB_DWC2_BASE + 0x024)
+#define GNPTXFSIZ          (USB_DWC2_BASE + 0x028)
+#define GSNPSID            (USB_DWC2_BASE + 0x040)
+#define GHWCFG1            (USB_DWC2_BASE + 0x044)
+#define GHWCFG2            (USB_DWC2_BASE + 0x048)
+#define GHWCFG3            (USB_DWC2_BASE + 0x04C)
+#define GHWCFG4            (USB_DWC2_BASE + 0x050)
+
+/* Device Registers */
+#define DCFG               (USB_DWC2_BASE + 0x800)
+#define DCTL               (USB_DWC2_BASE + 0x804)
+#define DSTS               (USB_DWC2_BASE + 0x808)
+#define DIEPMSK            (USB_DWC2_BASE + 0x810)
+#define DOEPMSK            (USB_DWC2_BASE + 0x814)
+#define DAINT              (USB_DWC2_BASE + 0x818)
+#define DAINTMSK           (USB_DWC2_BASE + 0x81C)
+
+/* Endpoints (EP0 is at 0x900/0xB00) */
+#define DIEPCTL0           (USB_DWC2_BASE + 0x900)
+#define DOEPCTL0           (USB_DWC2_BASE + 0xB00)
+
+/* Register Helpers */
+static inline void write32(uintptr_t addr, uint32_t val) {
+    *(volatile uint32_t *)addr = val;
+}
+
+static inline uint32_t read32(uintptr_t addr) {
+    return *(volatile uint32_t *)addr;
+}
+
+/* Driver Functions */
+void dwc2_poll();
+void dwc2_send_packet(uint8_t ep_num, const uint8_t *data, uint32_t len);
+
+#endif /* USB_DWC2_H */