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Timur Tabi7a78f142007-01-31 15:54:29 -06001Freescale MPC8349E-mITX and MPC8349E-mITX-GP Boards
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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 CONFIG_MPC8349ITXGP MPC8349E-mITX-GP
95
965. Compilation
97
98 Assuming you're using BASH shell:
99
100 export CROSS_COMPILE=your-cross-compile-prefix
101 cd u-boot
102 make distclean
103
104 make MPC8349ITX_config
105 or:
106 make MPC8349ITXGP_config
107 or:
108 make MPC8349ITX_LOWBOOT_config
109
110 make
111
1126. Downloading and Flashing Images
113
1146.1 Download via tftp:
115
116 tftp $loadaddr <uboot>
117
118 where "<uboot>" is the path and filename, on the TFTP server, of
119 the U-Boot image.
120
1216.1 Reflash U-Boot Image using U-Boot
122
123 setenv uboot <uboot>
124 run tftpflash
125
126 where "<uboot>" is the path and filename, on the TFTP server, of
127 the U-Boot image.
128
1296.2 Using the HRCW to switch between two different U-Boot images on the ITX
130
131 Because the ITX has 16MB of flash, it is possible to keep two U-Boot
132 images in flash, and use the HRCW to specify which one is to be used
133 when the board boots. This trick is especially effective with a
134 hardware debugger that can override the HRCW, such as the BDI-2000.
135
136 When the BMS bit in the HRCW is 0, the ITX will boot the U-Boot image
137 at address FE000000. When the BMS bit is 1, the ITX will boot the
138 image at address FEF00000.
139
140 Therefore, just put a U-Boot image at both FE000000 and FEF00000 and
141 change the BMS bit whenever you want to boot the other image.
142
143 Step-by-step instructions:
144
145 1) Build an ITX image to be loaded at FEF00000
146
147 make distclean
148 make MPC8349ITX_config
149 make
150
151 2) Take the u-boot.bin image and flash it at FEF00000.
152
153 tftp $loadaddr u-boot.bin
154 protect off all
155 erase FEF00000 +$filesize
156 cp.b $loadaddr FEF00000 $filesize
157
158 3) Build an ITX image to be loaded at FE000000
159
160 make distclean
161 make MPC8349ITX_LOWBOOT_config
162 make
163
164 4) Take the u-boot.bin image and flash it at FE000000.
165
166 tftp $loadaddr u-boot.bin
167 protect off FE000000 +$filesize
168 erase FE000000 +$filesize
169 cp.b $loadaddr FE000000 $filesize
170
171 The HRCW in flash is currently set to boot the image at FE000000.
172
173 If you have a hardware debugger, configure it to set the HRCW to
174 B460A000 04040000 if you want to boot the image at FEF00000, or set
175 it to B060A000 04040000 if you want to boot the image at FE000000.
176
177 To change the HRCW in flash to boot the image at FEF00000, use these
178 U-Boot commands:
179
180 cp.b FE000000 1000 10000 ; copy 1st flash sector to 1000
181 mw.b 1020 b4 8 ; modify BMS bit
182 protect off FE000000 +10000
183 erase FE000000 +10000
184 cp.b 1000 FE000000 10000
185
1867. Notes
187 1) The console baudrate for MPC8349EITX is 115200bps.