boot: refactor i2c driver into namespace

stratosphere/boot/source/i2c/i2c_command_list.hpp

@@ -0,0 +1,66 @@
+/*
+ * Copyright (c) 2018-2019 Atmosphère-NX
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+#include <switch.h>
+#include <stratosphere.hpp>
+
+#include "i2c_types.hpp"
+
+namespace sts::i2c {
+
+    enum class Command {
+        Send = 0,
+        Receive = 1,
+        SubCommand = 2,
+        Count,
+    };
+
+    enum class SubCommand {
+        Sleep = 0,
+        Count,
+    };
+
+    class CommandListFormatter {
+        public:
+            static constexpr size_t MaxCommandListSize = 0x100;
+        private:
+            u8 *cmd_list = nullptr;
+            size_t cmd_list_size = 0;
+            size_t cur_index = 0;
+        public:
+            CommandListFormatter(void *cmd_list, size_t cmd_list_size) : cmd_list(static_cast<u8 *>(cmd_list)), cmd_list_size(cmd_list_size) {
+                if (cmd_list_size > MaxCommandListSize) {
+                    std::abort();
+                }
+            }
+            ~CommandListFormatter() {
+                this->cmd_list = nullptr;
+            }
+
+        private:
+            Result CanEnqueue(size_t size) const;
+        public:
+            size_t GetCurrentSize() const {
+                return this->cur_index;
+            }
+
+            Result EnqueueSendCommand(I2cTransactionOption option, const void *src, size_t size);
+            Result EnqueueReceiveCommand(I2cTransactionOption option, size_t size);
+            Result EnqueueSleepCommand(size_t us);
+    };
+
+}