bdk: add emmc ops

- Add support for lower eMMC bus speed init in case of failures
- Add error count reporting
- Function names and defines changed from nx_emmc to emmc (except autorcm helper function)
- Enabling emuMMC support needs BDK_EMUMMC_ENABLE flag passed over

bdk/storage/emmc.h

@@ -0,0 +1,75 @@
+/*
+ * Copyright (c) 2018 naehrwert
+ * Copyright (c) 2019-2022 CTCaer
+ *
+ * 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/>.
+ */
+
+#ifndef _EMMC_H_
+#define _EMMC_H_
+
+#include <storage/sdmmc.h>
+#include <utils/types.h>
+#include <utils/list.h>
+
+#include <libs/fatfs/ff.h>
+
+#define GPT_FIRST_LBA  1
+#define GPT_NUM_BLOCKS 33
+#define EMMC_BLOCKSIZE 512
+
+enum
+{
+    EMMC_INIT_FAIL = 0,
+    EMMC_1BIT_HS52 = 1,
+    EMMC_8BIT_HS52 = 2,
+    EMMC_MMC_HS200 = 3,
+    EMMC_MMC_HS400 = 4,
+};
+
+enum
+{
+    EMMC_ERROR_INIT_FAIL = 0,
+    EMMC_ERROR_RW_FAIL   = 1,
+    EMMC_ERROR_RW_RETRY  = 2
+};
+
+typedef struct _emmc_part_t
+{
+	u32 index;
+	u32 lba_start;
+	u32 lba_end;
+	u64 attrs;
+	char name[37];
+	link_t link;
+} emmc_part_t;
+
+extern sdmmc_t emmc_sdmmc;
+extern sdmmc_storage_t emmc_storage;
+extern FATFS emmc_fs;
+
+void emmc_error_count_increment(u8 type);
+u16 *emmc_get_error_count();
+u32  emmc_get_mode();
+int  emmc_init_retry(bool power_cycle);
+bool emmc_initialize(bool power_cycle);
+
+void emmc_gpt_parse(link_t *gpt);
+void emmc_gpt_free(link_t *gpt);
+emmc_part_t *emmc_part_find(link_t *gpt, const char *name);
+int  emmc_part_read(emmc_part_t *part, u32 sector_off, u32 num_sectors, void *buf);
+int  emmc_part_write(emmc_part_t *part, u32 sector_off, u32 num_sectors, void *buf);
+
+void nx_emmc_get_autorcm_masks(u8 *mod0, u8 *mod1);
+
+#endif