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diff --git a/doc/README.mflash b/doc/README.mflash deleted file mode 100644 index 50133b4..0000000 --- a/doc/README.mflash +++ /dev/null @@ -1,94 +0,0 @@ - -This document describes m[g]flash support in u-boot. - -Contents - 1. Overview - 2. Porting mflash driver - 3. Mflash command - 4. Misc. - -1. Overview -Mflash and gflash are embedded flash drive. The only difference is mflash is -MCP(Multi Chip Package) device. These two device operate exactly same way. -So the rest mflash repersents mflash and gflash altogether. - -2. Porting mflash driver - -2-1. Board configuration -* Mflash driver support -#define CONFIG_CMD_MG_DISK -#define CONFIG_LIBATA - -* Environment variable support (optional) -#define CONFIG_ENV_IS_IN_MG_DISK -Also CONFIG_ENV_ADDR and CONFIG_ENV_SIZE should be defined. -CONFIG_ENV_ADDR is byte offset starting from 0. - -Following example sets environment variable location to 0x80000 (1024'th -sector) and size of 0x400 (1024 byte) -#define CONFIG_ENV_ADDR 0x80000 -#define CONFIG_ENV_SIZE 0x400 - -* Reserved size config (optional) -If you want to use some reserved area for bootloader, environment variable or -whatever, use CONFIG_MG_DISK_RES. The unit is KB. Mflash's block operation -method use this value as start offset. So any u-boot's partition table parser -and file system command work consistently. You can access this area by using -mflash command. - -Following example sets 10MB of reserved area. -#define CONFIG_MG_DISK_RES 10240 - -2-2. Porting mg_get_drv_data function -Mflash is active device and need some gpio control for proper operation. -This board dependency resolved by using mg_get_drv_data function. -Port this function at your board init file. See include/mg_disk.h - -Here is some pseudo example. - -static void custom_hdrst_pin (u8 level) -{ - if (level) - /* set hard reset pin to high */ - else - /* set hard reset pin to low */ -} - -static void custom_ctrl_pin_init (void) -{ - /* Set hard reset, write protect, deep power down pins - * to gpio. - * Set these pins to output high - */ -} - -struct mg_drv_data* mg_get_drv_data (void) -{ - static struct mg_drv_data prv; - - prv.base = /* base address of mflash */ - prv.mg_ctrl_pin_init = custom_ctrl_pin_init; - prv.mg_hdrst_pin = custom_hdrst_pin; - - return &prv; -} - -3. Mflash command - -* initialize : mgd init -* random read : mgd read [from] [to] [size] - ex) read 256 bytes from 0x300000 of mflash to 0xA0100000 of host memory - mgd read 0x300000 0xA0100000 256 -* random write : mgd write [from] [to] [size] -* sector read : mgd readsec [sector] [to] [count] - ex) read 10 sectors starts from 400 sector to 0xA0100000 - mgd readsec 400 0xA0100000 10 -* sector write : mgd writesec [from] [sector] [count] - -4. Misc. -Mflash's device interface name for block driver is "mgd". -Here is ext2 file system access example. - - mgd init - ext2ls mgd 0:1 /boot - ext2load mgd 0:1 0xa0010000 /boot/uImage 1954156 |