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1Freescale MPC8349E-mITX and MPC8349E-mITX-GP Boards
2---------------------------------------------------
3
41.	Board Description
5
6	The MPC8349E-mITX and MPC8349E-mITX-GP are reference boards featuring
7	the Freescale MPC8349E processor in a Mini-ITX form factor.
8
9	The MPC8349E-mITX-GP is an MPC8349E-mITX with the following differences:
10
11	A) One 8MB on-board flash EEPROM chip, instead of two.
12	B) No SATA controller
13	C) No Compact Flash slot
14	D) No Mini-PCI slot
15	E) No Vitesse 7385 5-port Ethernet switch
16	F) No 4-port USB Type-A interface
17
182.	Board Switches and Jumpers
19
202.0	Descriptions for all of the board jumpers can be found in the User
21	Guide.  Of particular interest to U-Boot developers is jumper J22:
22
23	Pos.	Name		Default		Description
24	-----------------------------------------------------------------------
25	A	LGPL0		ON (0)          HRCW source, bit 0
26	B       LGPL1           ON (0)          HRCW source, bit 1
27	C       LGPL3           ON (0)		HRCW source, bit 2
28	D       LGPL5           OFF (1)         PCI_SYNC_OUT frequency
29	E       BOOT1           ON (0)          Flash EEPROM boot device
30	F       PCI_M66EN       ON (0)          PCI 66MHz enable
31	G       I2C-WP          ON (0)          I2C EEPROM write protection
32	H       F_WP            OFF (1)         Flash EEPROM write protection
33
34	Jumper J22.E is only for the ITX, and it decides the configuration
35	of the flash chips.  If J22.E is ON (i.e. jumpered), then flash chip
36	U4 is located at address FE000000 and flash chip U7 is at FE800000.
37	If J22.E is OFF, then U7 is at FE000000 and U4 is at FE800000.
38
39	For U-Boot development, J22.E can be used to switch back-and-forth
40	between two U-Boot images.
41
423.	Memory Map
43
443.1.	The memory map should look pretty much like this:
45
46	0x0000_0000 - 0x0FFF_FFFF DDR SDRAM (256 MB)
47	0x8000_0000 - 0x9FFF_FFFF PCI1 memory space (512 MB)
48	0xA000_0000 - 0xBFFF_FFFF PCI2 memory space (512 MB)
49	0xE000_0000 - 0xEFFF_FFFF IMMR (1 MB)
50	0xE200_0000 - 0xE2FF_FFFF PCI1 I/O space (16 MB)
51	0xE300_0000 - 0xE3FF_FFFF PCI2 I/O space (16 MB)
52	0xF000_0000 - 0xF000_FFFF Compact Flash (ITX only)
53	0xF001_0000 - 0xF001_FFFF Local bus expansion slot
54	0xF800_0000 - 0xF801_FFFF Vitesse 7385 Parallel Interface (ITX only)
55	0xFE00_0000 - 0xFE7F_FFFF First 8MB bank of Flash memory
56	0xFE80_0000 - 0xFEFF_FFFF Second 8MB bank of Flash memory (ITX only)
57
583.2	Flash EEPROM layout.
59
60	On the ITX, jumper J22.E is used to determine which flash chips are
61	at which address.  When J22.E is switched, addresses from FE000000
62	to FE7FFFFF are swapped with addresses from FE800000 to FEFFFFFF.
63
64	On the ITX, at the normal boot address (aka HIGHBOOT):
65
66	FE00_0000	HRCW
67	FE70_0000	Alternative U-Boot image
68	FE80_0000	Alternative HRCW
69	FEF0_0000	U-Boot image
70	FEFF_FFFF	End of flash
71
72	On the ITX, at the low boot address (LOWBOOT)
73
74	FE00_0000	HRCW and U-Boot image
75	FE04_0000	U-Boot environment variables
76	FE80_0000	Alternative HRCW and U-Boot image
77	FEFF_FFFF	End of flash
78
79	On the ITX-GP, the only option is LOWBOOT and there is only one chip
80
81	FE00_0000	HRCW and U-Boot image
82	FE04_0000	U-Boot environment variables
83	F7FF_FFFF	End of flash
84
854. Definitions
86
874.1 Explanation of NEW definitions in:
88
89	include/configs/MPC8349ITX.h
90
91	CONFIG_MPC83xx		MPC83xx family
92	CONFIG_MPC8349		MPC8349 specific
93	CONFIG_MPC8349ITX		MPC8349E-mITX
94
955. Compilation
96
97	Assuming you're using BASH shell:
98
99		export CROSS_COMPILE=your-cross-compile-prefix
100		cd u-boot
101		make distclean
102
103		make MPC8349ITX_config
104	or:
105		make MPC8349ITXGP_config
106	or:
107		make MPC8349ITX_LOWBOOT_config
108
109		make
110
1116. Downloading and Flashing Images
112
1136.1 Download via tftp:
114
115	tftp $loadaddr <uboot>
116
117	where "<uboot>" is the path and filename, on the TFTP server, of
118	the U-Boot image.
119
1206.1 Reflash U-Boot Image using U-Boot
121
122	setenv uboot <uboot>
123	run tftpflash
124
125	where "<uboot>" is the path and filename, on the TFTP server, of
126	the U-Boot image.
127
1286.2 Using the HRCW to switch between two different U-Boot images on the ITX
129
130	Because the ITX has 16MB of flash, it is possible to keep two U-Boot
131	images in flash, and use the HRCW to specify which one is to be used
132	when the board boots.  This trick is especially effective with a
133	hardware debugger that can override the HRCW, such as the BDI-2000.
134
135	When the BMS bit in the HRCW is 0, the ITX will boot the U-Boot image
136	at address FE000000.  When the BMS bit is 1, the ITX will boot the
137	image at address FEF00000.
138
139	Therefore, just put a U-Boot image at both FE000000 and FEF00000 and
140	change the BMS bit whenever you want to boot the other image.
141
142	Step-by-step instructions:
143
144	1) Build an ITX image to be loaded at FEF00000
145
146		make distclean
147		make MPC8349ITX_config
148		make
149
150	2) Take the u-boot.bin image and flash it at FEF00000.
151
152		tftp $loadaddr u-boot.bin
153		protect off all
154		erase FEF00000 +$filesize
155		cp.b $loadaddr FEF00000 $filesize
156
157	3) Build an ITX image to be loaded at FE000000
158
159		make distclean
160		make MPC8349ITX_LOWBOOT_config
161		make
162
163	4) Take the u-boot.bin image and flash it at FE000000.
164
165		tftp $loadaddr u-boot.bin
166		protect off FE000000 +$filesize
167		erase FE000000 +$filesize
168		cp.b $loadaddr FE000000 $filesize
169
170	The HRCW in flash is currently set to boot the image at FE000000.
171
172	If you have a hardware debugger, configure it to set the HRCW to
173	B460A000 04040000 if you want to boot the image at FEF00000, or set
174	it to B060A000 04040000 if you want to boot the image at FE000000.
175
176	To change the HRCW in flash to boot the image at FEF00000, use these
177	U-Boot commands:
178
179		cp.b FE000000 1000 10000	; copy 1st flash sector to 1000
180		mw.b 1020 b4 8			; modify BMS bit
181		protect off FE000000 +10000
182		erase FE000000 +10000
183		cp.b 1000 FE000000 10000
184
1857. Notes
186	1) The console baudrate for MPC8349EITX is 115200bps.
187