RP2040 support

src/portable/raspberrypi/rp2040/rp2040_usb.h

@@ -0,0 +1,124 @@
+#ifndef RP2040_COMMON_H_
+#define RP2040_COMMON_H_
+
+#if defined(RP2040_USB_HOST_MODE) && defined(RP2040_USB_DEVICE_MODE)
+#error TinyUSB device and host mode not supported at the same time
+#endif
+
+#include "common/tusb_common.h"
+
+#include "pico.h"
+#include "hardware/structs/usb.h"
+#include "hardware/irq.h"
+#include "hardware/resets.h"
+
+#if defined(PICO_RP2040_USB_DEVICE_ENUMERATION_FIX) && !defined(TUD_OPT_RP2040_USB_DEVICE_ENUMERATION_FIX)
+#define TUD_OPT_RP2040_USB_DEVICE_ENUMERATION_FIX PICO_RP2040_USB_DEVICE_ENUMERATION_FIX
+#endif
+
+// For memset
+#include <string.h>
+
+#if false && !defined(NDEBUG)
+#define pico_trace(format,args...) printf(format, ## args)
+#else
+#define pico_trace(format,...) ((void)0)
+#endif
+
+#if false && !defined(NDEBUG)
+#define pico_info(format,args...) printf(format, ## args)
+#else
+#define pico_info(format,...) ((void)0)
+#endif
+
+#if false && !defined(NDEBUG)
+#define pico_warn(format,args...) printf(format, ## args)
+#else
+#define pico_warn(format,...) ((void)0)
+#endif
+
+// Hardware information per endpoint
+struct hw_endpoint
+{
+    // Is this a valid struct
+    bool configured;
+    // EP direction
+    bool in;
+    // EP num (not including direction)
+    uint8_t num;
+    
+    // Transfer direction (i.e. IN is rx for host but tx for device)
+    // allows us to common up transfer functions
+    bool rx;
+    
+    uint8_t ep_addr;
+    uint8_t next_pid;
+
+    // Endpoint control register
+    io_rw_32 *endpoint_control;
+    // Buffer control register
+    io_rw_32 *buffer_control;
+
+    // Buffer pointer in usb dpram
+    uint8_t *hw_data_buf;
+
+    // Have we been stalled
+    bool stalled;
+
+    // Current transfer information
+    bool active;
+    uint total_len;
+    uint len;
+    // Amount of data with the hardware
+    uint transfer_size;
+    // Only needed for host mode
+    bool last_buf;
+    // HOST BUG. Host will incorrect write status to top half of buffer
+    // control register when doing transfers > 1 packet
+    uint8_t buf_sel;
+    // User buffer in main memory
+    uint8_t *user_buf;
+
+    // Data needed from EP descriptor
+    uint wMaxPacketSize;
+    // Interrupt, bulk, etc
+    uint8_t transfer_type;
+    
+    // Only needed for host
+    uint8_t dev_addr;
+    bool sent_setup;
+    // If interrupt endpoint
+    uint8_t interrupt_num;
+};
+
+void rp2040_usb_init(void);
+
+void hw_endpoint_reset_transfer(struct hw_endpoint *ep);
+void _hw_endpoint_xfer(struct hw_endpoint *ep, uint8_t *buffer, uint16_t total_len, bool start);
+void _hw_endpoint_start_next_buffer(struct hw_endpoint *ep);
+void _hw_endpoint_xfer_start(struct hw_endpoint *ep, uint8_t *buffer, uint16_t total_len);
+void _hw_endpoint_xfer_sync(struct hw_endpoint *ep);
+bool _hw_endpoint_xfer_continue(struct hw_endpoint *ep);
+void _hw_endpoint_buffer_control_update32(struct hw_endpoint *ep, uint32_t and_mask, uint32_t or_mask);
+static inline uint32_t _hw_endpoint_buffer_control_get_value32(struct hw_endpoint *ep) {
+    return *ep->buffer_control;
+}
+static inline void _hw_endpoint_buffer_control_set_value32(struct hw_endpoint *ep, uint32_t value) {
+    return _hw_endpoint_buffer_control_update32(ep, 0, value);
+}
+static inline void _hw_endpoint_buffer_control_set_mask32(struct hw_endpoint *ep, uint32_t value) {
+    return _hw_endpoint_buffer_control_update32(ep, ~value, value);
+}
+static inline void _hw_endpoint_buffer_control_clear_mask32(struct hw_endpoint *ep, uint32_t value) {
+    return _hw_endpoint_buffer_control_update32(ep, ~value, 0);
+}
+
+static inline uintptr_t hw_data_offset(uint8_t *buf)
+{
+    // Remove usb base from buffer pointer
+    return (uintptr_t)buf ^ (uintptr_t)usb_dpram;
+}
+
+extern const char *ep_dir_string[];
+
+#endif