sdmmc: begin skeletoning sdmmc driver

libraries/libvapours/source/sdmmc/impl/sdmmc_i_host_controller.hpp

@@ -0,0 +1,89 @@
+/*
+ * Copyright (c) 2018-2020 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 <vapours.hpp>
+
+#if defined(AMS_SDMMC_USE_OS_EVENTS)
+#include <stratosphere/os.hpp>
+#endif
+
+namespace ams::sdmmc::impl {
+
+    enum ResponseType {
+        ResponseType_R0 = 0,
+        ResponseType_R1 = 1,
+        ResponseType_R2 = 2,
+        ResponseType_R3 = 3,
+        ResponseType_R6 = 4,
+        ResponseType_R7 = 5,
+    };
+
+    enum TransferDirection {
+        TransferDirection_ReadFromDevice = 0,
+        TransferDirection_WriteToDevice  = 1,
+    };
+
+    struct Command {
+        u32 command_index;
+        u32 command_argument;
+        ResponseType response_type;
+        bool is_busy;
+
+        constexpr Command(u32 ci, u32 ca, ResponseType r, bool b) : command_index(ci), command_argument(ca), response_type(r), is_busy(b) { /* ... */ }
+    };
+
+    struct TransferData {
+        void *buffer;
+        size_t block_size;
+        u32 num_blocks;
+        TransferDirection transfer_direction;
+        bool is_multi_block_transfer;
+        bool is_stop_transmission_command_enabled;
+
+        constexpr TransferData(void *b, size_t bs, u32 nb, TransferDirection xd, bool mb, bool st)
+            : buffer(b), block_size(bs),  num_blocks(nb), transfer_direction(xd), is_multi_block_transfer(mb), is_stop_transmission_command_enabled(st)
+        {
+            if (this->num_blocks > 1) {
+                AMS_ABORT_UNLESS(this->is_multi_block_transfer);
+            }
+        }
+
+        constexpr TransferData(void *b, size_t bs, u32 nb, TransferDirection xd)
+            : buffer(b), block_size(bs), num_blocks(nb), transfer_direction(xd), is_multi_block_transfer(false), is_stop_transmission_command_enabled(false)
+        {
+            AMS_ABORT_UNLESS(this->num_blocks == 1);
+        }
+    };
+
+    class IHostController {
+        public:
+            #if defined(AMS_SDMMC_USE_OS_EVENTS)
+            virtual void PreSetRemovedEvent(ams::os::EventType *event) = 0;
+            #endif
+
+            virtual void Initialize() = 0;
+            virtual void Finalize() = 0;
+
+            /* TODO */
+
+            virtual void ChangeCheckTransferInterval(u32 ms) = 0;
+            virtual void SetDefaultCheckTransferInterval() = 0;
+
+            /* TODO */
+    };
+
+}