1 files changed, 175 insertions, 0 deletions
diff --git a/lib/pico-sdk/boot/picoboot.h b/lib/pico-sdk/boot/picoboot.h
new file mode 100644
index 00000000..8645d52d
--- /dev/null
+++ b/lib/pico-sdk/boot/picoboot.h
@@ -0,0 +1,175 @@
+/*
+ * Copyright (c) 2020 Raspberry Pi (Trading) Ltd.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef _BOOT_PICOBOOT_H
+#define _BOOT_PICOBOOT_H
+
+#include <stdint.h>
+#include <stdbool.h>
+#include <assert.h>
+
+#ifndef NO_PICO_PLATFORM
+#include "pico/platform.h"
+#endif
+
+/** \file picoboot.h
+*  \defgroup boot_picoboot_headers boot_picoboot_headers
+*
+* \brief Header file for the PICOBOOT USB interface exposed by an RP2xxx chip in BOOTSEL mode
+*/
+
+#include "picoboot_constants.h"
+
+#define PICOBOOT_MAGIC 0x431fd10bu
+
+// --------------------------------------------
+// CONTROL REQUESTS FOR THE PICOBOOT INTERFACE
+// --------------------------------------------
+
+// size 0 OUT - un-stall EPs and reset
+#define PICOBOOT_IF_RESET 0x41
+
+// size 16 IN - return the status of the last command
+#define PICOBOOT_IF_CMD_STATUS 0x42
+
+// --------------------------------------------------
+// COMMAND REQUESTS SENT TO THE PICOBOOT OUT ENDPOINT
+// --------------------------------------------------
+//
+// picoboot_cmd structure of size 32 is sent to OUT endpoint
+// transfer_length bytes are transferred via IN/OUT
+// device responds on success with 0 length ACK packet set via OUT/IN
+// device may stall the transferring endpoint in case of error
+
+enum picoboot_cmd_id {
+    PC_EXCLUSIVE_ACCESS = 0x1,
+    PC_REBOOT = 0x2,
+    PC_FLASH_ERASE = 0x3,
+    PC_READ = 0x84, // either RAM or FLASH
+    PC_WRITE = 0x5, // either RAM or FLASH (does no erase)
+    PC_EXIT_XIP = 0x6,
+    PC_ENTER_CMD_XIP = 0x7,
+    PC_EXEC = 0x8,
+    PC_VECTORIZE_FLASH = 0x9,
+    // RP2350 only below here
+    PC_REBOOT2 = 0xa,
+    PC_GET_INFO = 0x8b,
+    PC_OTP_READ = 0x8c,
+    PC_OTP_WRITE = 0xd,
+    //PC_EXEC2 = 0xe, // currently unused
+};
+
+enum picoboot_status {
+    PICOBOOT_OK = 0,
+    PICOBOOT_UNKNOWN_CMD = 1,
+    PICOBOOT_INVALID_CMD_LENGTH = 2,
+    PICOBOOT_INVALID_TRANSFER_LENGTH = 3,
+    PICOBOOT_INVALID_ADDRESS = 4,
+    PICOBOOT_BAD_ALIGNMENT = 5,
+    PICOBOOT_INTERLEAVED_WRITE = 6,
+    PICOBOOT_REBOOTING = 7,
+    PICOBOOT_UNKNOWN_ERROR = 8,
+    PICOBOOT_INVALID_STATE = 9,
+    PICOBOOT_NOT_PERMITTED = 10,
+    PICOBOOT_INVALID_ARG = 11,
+    PICOBOOT_BUFFER_TOO_SMALL = 12,
+    PICOBOOT_PRECONDITION_NOT_MET = 13,
+    PICOBOOT_MODIFIED_DATA = 14,
+    PICOBOOT_INVALID_DATA = 15,
+    PICOBOOT_NOT_FOUND = 16,
+    PICOBOOT_UNSUPPORTED_MODIFICATION = 17,
+};
+
+struct __packed picoboot_reboot_cmd {
+    uint32_t dPC; // 0 means reset into regular boot path
+    uint32_t dSP;
+    uint32_t dDelayMS;
+};
+
+
+// note this (with pc_sp) union member has the same layout as picoboot_reboot_cmd except with extra dFlags
+struct __packed picoboot_reboot2_cmd {
+    uint32_t dFlags;
+    uint32_t dDelayMS;
+    uint32_t dParam0;
+    uint32_t dParam1;
+};
+
+// used for EXEC, VECTORIZE_FLASH
+struct __packed picoboot_address_only_cmd {
+    uint32_t dAddr;
+};
+
+// used for READ, WRITE, FLASH_ERASE
+struct __packed picoboot_range_cmd {
+    uint32_t dAddr;
+    uint32_t dSize;
+};
+
+struct __packed picoboot_exec2_cmd {
+    uint32_t image_base;
+    uint32_t image_size;
+    uint32_t workarea_base;
+    uint32_t workarea_size;
+};
+
+enum picoboot_exclusive_type {
+    NOT_EXCLUSIVE = 0,
+    EXCLUSIVE,
+    EXCLUSIVE_AND_EJECT
+};
+
+struct __packed picoboot_exclusive_cmd {
+    uint8_t bExclusive;
+};
+
+struct __packed picoboot_otp_cmd {
+    uint16_t wRow; // OTP row
+    uint16_t wRowCount; // number of rows to transfer
+    uint8_t bEcc; // use error correction (16 bit per register vs 24 (stored as 32) bit raw)
+};
+
+
+struct __packed picoboot_get_info_cmd {
+    uint8_t bType;
+    uint8_t bParam;
+    uint16_t wParam;
+    uint32_t dParams[3];
+};
+
+// little endian
+struct __packed __aligned(4) picoboot_cmd {
+    uint32_t dMagic;
+    uint32_t dToken; // an identifier for this token to correlate with a status response
+    uint8_t bCmdId; // top bit set for IN
+    uint8_t bCmdSize; // bytes of actual data in the arg part of this structure
+    uint16_t _unused;
+    uint32_t dTransferLength; // length of IN/OUT transfer (or 0) if none
+    union {
+        uint8_t args[16];
+        struct picoboot_reboot_cmd reboot_cmd;
+        struct picoboot_range_cmd range_cmd;
+        struct picoboot_address_only_cmd address_only_cmd;
+        struct picoboot_exclusive_cmd exclusive_cmd;
+        struct picoboot_reboot2_cmd reboot2_cmd;
+        struct picoboot_otp_cmd otp_cmd;
+        struct picoboot_get_info_cmd get_info_cmd;
+        struct picoboot_exec2_cmd exec2_cmd;
+    };
+};
+static_assert(32 == sizeof(struct picoboot_cmd), "picoboot_cmd must be 32 bytes big");
+
+struct __packed __aligned(4) picoboot_cmd_status {
+    uint32_t dToken;
+    uint32_t dStatusCode;
+    uint8_t bCmdId;
+    uint8_t bInProgress;
+    uint8_t _pad[6];
+};
+
+static_assert(16 == sizeof(struct picoboot_cmd_status), "picoboot_cmd_status must be 16 bytes big");
+
+#endif