MTK Android Driver ：memory
3.1 型号配置：
3.1.1 CUSTOM_MEMORY_HDR(需要确认是否是MTK认证的flash ic)
mediatek\custom\$(PROJECT)\preloader\inc\custom_MemoryDevice.h
#defineBOARD_ID MT6577_EVB
#defineCS_PART_NUMBER[0] H9TP32A4GDMCPR_KDM
#defineCS_PART_NUMBER[1] KMKUS000VM_B410
备注：新增flash ic添加到此处，flash可以做到兼容；不能兼容相同IC Id的memeory ic.
3.2 特定项目不同类型分区定义信息（是否定义、顺序）：
mediatek\custom\prj\kernel\core\src\partition.c
structpart_name_map g_part_name_map[PART_MAX_COUNT] = {
{"preloader", PART_PRELOADER, "rawdata", 0, 0, 0},
{"dsp_bl", PART_DSP_DL, "rawdata", 1, 0, 0},
{"mbr", PART_MBR, "raw data", 2, 1, 1},
{"ebr1", PART_EBR1, "raw data", 3, 1, 1},
{"pmt", PART_PMT, "raw data", 4, 0, 0},
{"nvram", PART_NVRAM, "rawdata", 5, 0, 0},
{"seccfg", PART_SECURE, "raw data", 6, 0, 0},
{"uboot", PART_UBOOT, "raw data", 7, 1, 1},
{"boot", PART_BOOTIMG, "raw data", 8, 1, 1},
{"recovery", PART_RECOVERY, "rawdata", 9, 1, 1},
{"sec_ro", PART_SECSTATIC, "ext4", 10, 0, 0},
{"misc", PART_MISC, "raw data", 11, 0, 0},
{"logo", PART_LOGO, "raw data", 12, 1, 1},
{"expdb", PART_APANIC, "raw data", 13, 0, 0},
{"system", PART_ANDSYSIMG, "ext4", 14, 1, 1},
{"cache", PART_CACHE, "ext4", 15, 1, 1},
{"userdata", PART_USER, "ext4", 16, 1, 1},
{"fat", PART_FAT, "fat", 17, 0, 0},
};
3.3 emmc scat 分区大小设置(emmc) :
可对emmc进行分区，修改preloader\systemimage\userdata\FAT等各个分区。
\alps\mediatek\build\tools\ptgen\MT6577\partition_table_MT6577.xls
备注：Cache分区需要保持在512mb左右，否则系统会比较慢，响应迟缓。
3.4 FLASH参数配置文件位置(MemoryDeviceList_MT6577.xls)：
MEMORY_DEVICE_XLS =
mediatek\build\tools\emigen\$(MTK_PLATFORM)\MemoryDeviceList_$(MTK_PLATFORM).xls
.xls文件含三个页面：
MT6577(page one):配置Flash Vendor Id 对应的硬件参数。
NAND(page two):
emmc_region(pagethree)
3.5 Flash驱动电压修改，读写速度方式修改：
mediatek\custom\konka73_gb\kernel\core\src\board.c
struct msdc_hw msdc0_hw = {
.clk_src = 1,
.cmd_edge =MSDC_SMPL_FALLING,
.data_edge =MSDC_SMPL_FALLING,
.clk_drv = 5, //: 0 //memory驱动电压
.cmd_drv = 5, //: 0
.dat_drv = 5, // : 0
#ifdefMTK_EMMC_SUPPORT
.data_pins = 8,
#else
.data_pins = 4,
#endif
.data_offset = 0,
#ifdefMTK_EMMC_SUPPORT
.flags = MSDC_SYS_SUSPEND | MSDC_HIGHSPEED,//memory读写速度
//.flags = MSDC_SYS_SUSPEND,
#else
.flags =MSDC_SDCARD_FLAG,
#endif
3.6 emmc FAT分区划分：
emmc型号、emmc软件分区都会影响FAT分区的大小。
验证FAT Size需要对应emmc型号机器下载对应emmc软件分区的软件，不能预先下载FAT部分（影响实际FAT分区大小）：
adb shell
cat /proc/emmc
cat /proc/partition获取大小。
3.7 ddr认证列表和时序集成(mtk或者ddr原厂提供)
alps\mediatek\build\tools\TabletEmiList\MT6582\TabletMemoryDeviceList_MT6582.xls