85xx: Add README for MPC8569MDS

Signed-off-by: Haiying Wang <Haiying.Wang@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

doc/README.mpc8569mds

+Overview
+--------
+MPC8569MDS is composed of two boards - PB (Processor Board) and PIB (Platform
+I/O Board). The mpc8569 PowerTM processor is mounted on PB board.
+
+Building U-boot
+-----------
+	make MPC8569MDS_config
+	make
+
+Memory Map
+----------
+0x0000_0000   0x7fff_ffff     DDR                     2G
+0xa000_0000   0xbfff_ffff     PCIe MEM                512MB
+0xe000_0000   0xe00f_ffff     CCSRBAR                 1M
+0xe280_0000   0xe2ff_ffff     PCIe I/O                8M
+0xc000_0000   0xdfff_ffff     SRIO                    512MB
+0xf000_0000   0xf3ff_ffff     SDRAM                   64MB
+0xf800_0000   0xf800_7fff     BCSR                    32KB
+0xf800_8000   0xf800_ffff     PIB (CS4)               32KB
+0xf801_0000   0xf801_7fff     PIB (CS5)               32KB
+0xfe00_0000   0xffff_ffff     Flash                   32MB
+
+
+Flashing u-boot Images
+---------------
+
+Use the following commands to program u-boot image into flash:
+
+	=> tftp 1000000 u-boot.bin
+	=> protect off all
+	=> erase fff80000 ffffffff
+	=> cp.b 1000000 fff80000 80000
+
+
+Setting the correct MAC addresses
+-----------------------
+The command - "mac", is introduced to set on-board system EEPROM in the format
+defined in board/freescale/common/sys_eeprom.c. we must set all 8 MAC
+addresses for the MPC8569MDS's 8 Ethernet ports and save it by "mac save" when
+we first get the board. The commands are as follows:
+	=> mac i NXID	/* Set NXID to this EEPROM */
+	=> mac e 01	/* Set Errata, this value is not defined by hardware
+			   designer, we can set whatever we want */
+	=> mac n a0	/* Set Serial Number. This is not defined by hardware
+			   designer, we can set whatever we want */
+	=> mac date 090512080000  /* Set the date in YYMMDDhhmmss format */
+
+	=> mac p 8	/* Set the number of mac ports, it should be 8 */
+	=> mac 0 xx:xx:xx:xx:xx:xx  /* xx:xx:xx:xx:xx:xx should be the real mac
+				       address, you can refer to the value on
+				       the sticker of the rear side of the board
+				     */
+	.....
+	=> mac 7 xx:xx:xx:xx:xx:xx
+	=> mac read
+	=> mac save
+
+After resetting the board, the ethxaddrs will be filled with the mac addresses
+if such environment variables are blank(never been set before). If the ethxaddr
+has been set but we want to update it, we can use the following commands:
+	=> setenv ethxaddr	/* x = "none",1,2,3,4,5,6,7 */
+	=> save
+	=> reset
+
+
+Programming the ucode to flash
+---------------------------------
+MPC8569 doesn't have ROM in QE, so we must upload the microcode(ucode) to QE's
+IRAM so that the QE can work. The ucode binary can be downloaded from
+http://opensource.freescale.com/firmware/, and it must be programmed to
+the address 0xfff0000 in the flash. Otherwise, the QE can't work and uboot
+hangs at "Net:"
+
+
+Please note the above two steps(setting mac addresses and programming ucode) are
+very important to get the board booting up and working properly.
+