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at91sam9260: use RCLK 

It might be possible to get this target going without
RCLK, but it would require more careful analysis and
usage of the reset events.

Enable fast memory accesses.

Tested on an at91sam9260 custom board w/external DRAM
and flash.

Signed-off-by: Øyvind Harboe <oyvind.harboe@zylin.com>
__archive__
Øyvind Harboe 2010-05-21 13:56:05 +02:00
parent 82ef8472bf
commit 2e1eaaae35
1 changed files with 12 additions and 19 deletions
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31
tcl/target/at91sam9260_ext_RAM_ext_flash.cfg
View File

@ -1,8 +1,4 @@
adapter_khz 4
jtag_rclk 4
######################################
# Target: Atmel AT91SAM9260
@ -44,26 +40,29 @@ jtag newtap $_CHIPNAME cpu -irlen 4 -ircapture 0x1 -irmask 0xf -expected-id $_CP
set _TARGETNAME $_CHIPNAME.cpu
target create $_TARGETNAME arm926ejs -endian $_ENDIAN -chain-position $_TARGETNAME -variant arm926ejs
$_TARGETNAME invoke-event halted
# Internal sram1 memory
$_TARGETNAME configure -work-area-phys 0x00300000 -work-area-size 0x1000 -work-area-backup 1
scan_chain
$_TARGETNAME configure -event reset-deassert-post {at91sam_init}
$_TARGETNAME configure -event reset-start {
# at reset chip runs at 32khz
jtag_rclk 8
}
$_TARGETNAME configure -event reset-init {at91sam_init}
# Flash configuration
#flash bank <name> cfi <base> <size> <chip width> <bus width> <target>
set _FLASHNAME $_CHIPNAME.flash
flash bank $_FLASHNAME cfi 0x10000000 0x01000000 2 2 $_TARGETNAME
# Faster memory downloads. This is disabled automatically during
# reset init since all reset init sequences are too short for
# fast memory access
arm7_9 dcc_downloads enable
arm7_9 fast_memory_access enable
proc at91sam_init { } {
# at reset chip runs at 32khz
adapter_khz 8
halt
mww 0xfffffd08 0xa5000501 # RSTC_MR : enable user reset
mww 0xfffffd44 0x00008000 # WDT_MR : disable watchdog
@ -79,16 +78,13 @@ proc at91sam_init { } {
sleep 10 # wait 10 ms
# Now run at anything fast... ie: 10mhz!
adapter_khz 10000 # Increase JTAG Speed to 6 MHz
arm7_9 dcc_downloads enable # Enable faster DCC downloads
jtag_rclk 10000 # Increase JTAG Speed to 6 MHz
mww 0xffffec00 0x0a0a0a0a # SMC_SETUP0 : Setup SMC for Intel NOR Flash JS28F128P30T85 128MBit
mww 0xffffec04 0x0b0b0b0b # SMC_PULSE0
mww 0xffffec08 0x00160016 # SMC_CYCLE0
mww 0xffffec0c 0x00161003 # SMC_MODE0
flash probe 0 # Identify flash bank 0
mww 0xfffff870 0xffff0000 # PIO_ASR : Select peripheral function for D15..D31
mww 0xfffff804 0xffff0000 # PIO_PDR : Disable PIO function for D15..D31
@ -123,6 +119,3 @@ proc at91sam_init { } {
mww 0x20000000 0
mww 0xffffea04 0x5d2 # SDRAMC_TR : Set refresh timer count to 15us
}