vendor: mediatek: Add mediatek mt8192 dram initialization code

This is the DRAM initialization code from the reference
implementation released by Mediatek for MT8192.

The DRAM calibration code can be taken as a standalone
library, used by different boot loaders for initializing
DRAM and following a different coding style (coreboot was
using Linux Kernel coding style), so we have to put it
in vendor code folder.

Signed-off-by: Xi Chen <xixi.chen@mediatek.com>
Change-Id: I3853204578069c6abf52689ea6f5d88841414bd4
Reviewed-on: https://review.coreboot.org/c/coreboot/+/50294
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Hung-Te Lin <hungte@chromium.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>

1 files changed, 68 insertions, 0 deletions

diff --git a/src/vendorcode/mediatek/mt8192/include/emi.h b/src/vendorcode/mediatek/mt8192/include/emi.h
new file mode 100644
index 000000000000..e94f74161faa
--- /dev/null
+++ b/src/vendorcode/mediatek/mt8192/include/emi.h
@@ -0,0 +1,68 @@
+/* SPDX-License-Identifier: BSD-3-Clause */
+
+#ifndef __EMI_H__
+#define __EMI_H__
+
+#include <soc/addressmap.h>
+#include <dramc_top.h>
+
+#define EMI_APB_BASE	EMI_BASE
+
+#if __ETT__
+#define emi_log	printf
+#elif __FLASH_TOOL_DA__
+#define emi_log	LOGD
+#else
+#define emi_log(_x_...) printk(BIOS_INFO, _x_)
+#endif
+
+struct isu_info_t {
+	unsigned int buf_size;
+	unsigned long long buf_addr;
+	unsigned long long ver_addr;
+	unsigned long long con_addr;
+};
+
+#define EMI_ISU_BUF_SIZE	0x800000
+#define LAST_EMI_MAGIC_PATTERN 0x19870611
+typedef struct {
+	unsigned int isu_magic;
+	unsigned int isu_ctrl;
+	unsigned int isu_dram_type;
+	unsigned int isu_diff_us;
+	unsigned int isu_buf_l;
+	unsigned int isu_buf_h;
+	unsigned int isu_version;
+	unsigned int snst_last;
+	unsigned int snst_past;
+	unsigned int os_flag_sspm;
+	unsigned int os_flag_ap;
+} LAST_EMI_INFO_T;
+#define DEF_LAST_EMI LAST_EMI_INFO_T
+
+void emi_init(void);
+void emi_init2(void);
+void clr_emi_mpu_prot(void);
+void dis_emi_apb_prot(void);
+int get_row_width_by_emi(unsigned int rank);
+int get_channel_nr_by_emi(void);
+int get_rank_nr_by_emi(void);
+void get_rank_size_by_emi(unsigned long long dram_rank_size[DRAMC_MAX_RK]);
+void set_cen_emi_cona(unsigned int cona_val);
+void set_cen_emi_conf(unsigned int conf_val);
+void set_cen_emi_conh(unsigned int conh_val);
+void set_chn_emi_cona(unsigned int cona_val);
+void set_chn_emi_conc(unsigned int conc_val);
+unsigned int get_cen_emi_cona(void);
+unsigned int get_chn_emi_cona(void);
+void phy_addr_to_dram_addr(dram_addr_t *dram_addr, unsigned long long phy_addr);
+unsigned int set_emi_before_rank1_mem_test(void);
+void restore_emi_after_rank1_mem_test(void);
+void get_emi_isu_info(struct isu_info_t *isu_info_ptr);
+void reserve_emi_isu_buf(void);
+void reserve_emi_mbist_buf(void);
+void record_emi_snst(void);
+unsigned long long platform_memory_size(void);
+
+#endif /* __EMI_H__ */
+