1 # Atheros AR71xx MIPS 24Kc SoC.
2 # tested on PB44 refererence board
7 reset_config trst_and_srst
11 jtag newtap $CHIPNAME cpu -irlen 5 -ircapture 0x1 -irmask 0x1f -expected-id 1
13 set TARGETNAME $CHIPNAME.cpu
14 target create $TARGETNAME mips_m4k -endian big -chain-position $TARGETNAME
16 $TARGETNAME configure -event reset-halt-post {
17 #setup PLL to lowest common denominator 300/300/150 setting
18 mww 0xb8050000 0x000f40a3 # reset val + CPU:3 DDR:3 AHB:0
19 mww 0xb8050000 0x800f40a3 # send to PLL
21 #next command will reset for PLL changes to take effect
22 mww 0xb8050008 3 # set reset_switch and clock_switch (resets SoC)
25 $TARGETNAME configure -event reset-init {
26 #complete pll initialization
27 mww 0xb8050000 0x800f0080 # set sw_update bit
28 mww 0xb8050008 0 # clear reset_switch bit
29 mww 0xb8050000 0x800f00e8 # clr pwrdwn & bypass
30 mww 0xb8050008 1 # set clock_switch bit
31 sleep 1 # wait for lock
33 # Setup DDR config and flash mapping
34 mww 0xb8000000 0xefbc8cd0 # DDR cfg cdl val (rst: 0x5bfc8d0)
35 mww 0xb8000004 0x8e7156a2 # DDR cfg2 cdl val (rst: 0x80d106a8)
37 mww 0xb8000010 8 # force precharge all banks
38 mww 0xb8000010 1 # force EMRS update cycle
39 mww 0xb800000c 0 # clr ext. mode register
40 mww 0xb8000010 2 # force auto refresh all banks
41 mww 0xb8000010 8 # force precharge all banks
42 mww 0xb8000008 0x31 # set DDR mode value CAS=3
43 mww 0xb8000010 1 # force EMRS update cycle
44 mww 0xb8000014 0x461b # DDR refresh value
45 mww 0xb8000018 0xffff # DDR Read Data This Cycle value (16bit: 0xffff)
46 mww 0xb800001c 0x7 # delay added to the DQS line (normal = 7)
52 # setup working area somewhere in RAM
53 $TARGETNAME configure -work-area-phys 0xa0600000 -work-area-size 0x20000
55 # serial SPI capable flash
56 # flash bank <driver> <base> <size> <chip_width> <bus_width>