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# Cogent CSB337
# http://cogcomp.com/csb_csb337.htm
source [find target/at91rm9200.cfg]
# boots from NOR on CS0: 8 MBytes CFI flash, 16-bit bus
set _FLASHNAME $_CHIPNAME.flash
flash bank $_FLASHNAME cfi 0x10000000 0x00800000 2 2 $_TARGETNAME
# ETM9 trace port connector present on this board, 16 data pins.
if { [info exists ETM_DRIVER] } {
etm config $_TARGETNAME 16 normal half $ETM_DRIVER
# OpenOCD may someday support a real trace port driver...
# system config file would need to configure it.
} else {
etm config $_TARGETNAME 16 normal half dummy
etm_dummy config $_TARGETNAME
}
proc csb337_clk_init { } {
# CPU is in Slow Clock Mode (32KiHz) ... needs slow JTAG clock
jtag_khz 8
# CKGR_MOR: start main oscillator (3.6864 MHz)
mww 0xfffffc20 0xff01
sleep 10
# CKGR_PLLAR: start PLL A for CPU and peripherals (184.32 MHz)
mww 0xfffffc28 0x20313e01
# CKGR_PLLBR: start PLL B for USB timing (96 MHz, with div2)
mww 0xfffffc2c 0x12703e18
# let PLLs lock
sleep 10
# PMC_MCKR: switch to CPU clock = PLLA, master clock = CPU/4
mww 0xfffffc30 0x0302
sleep 20
# CPU is in Normal Mode ... allows faster JTAG clock speed
jtag_khz 40000
}
proc csb337_nor_init { } {
# SMC_CSR0: adjust timings (10 wait states)
mww 0xffffff70 0x1100318a
flash probe 0
}
proc csb337_sdram_init { } {
# enable PIOC clock
mww 0xfffffc10 0x0010
# PC31..PC16 are D31..D16, with internal pullups like D15..D0
mww 0xfffff870 0xffff0000
mww 0xfffff874 0x0
mww 0xfffff804 0xffff0000
# SDRC_CR: set timings
mww 0xffffff98 0x2188b0d5
# SDRC_MR: issue all banks precharge to SDRAM
mww 0xffffff90 2
mww 0x20000000 0
# SDRC_MR: 8 autorefresh cycles
mww 0xffffff90 4
mww 0x20000000 0
mww 0x20000000 0
mww 0x20000000 0
mww 0x20000000 0
mww 0x20000000 0
mww 0x20000000 0
mww 0x20000000 0
mww 0x20000000 0
# SDRC_MR: set SDRAM mode registers (CAS, burst len, etc)
mww 0xffffff90 3
mww 0x20000080 0
# SDRC_TR: set refresh rate
mww 0xffffff94 0x200
mww 0x20000000 0
# SDRC_MR: normal mode, 32 bit bus
mww 0xffffff90 0
mww 0x20000000 0
}
# The rm9200 chip has just been reset. Bring it up far enough
# that we can write flash or run code from SDRAM.
proc csb337_reset_init { } {
csb337_clk_init
# EBI_CSA: CS0 = NOR, CS1 = SDRAM
mww 0xffffff60 0x02
csb337_nor_init
csb337_sdram_init
# Update CP15 control register ... we don't seem to be able to
# read/modify/write its value through a TCL variable, so just
# write it. Fields are zero unless listed here ... and note
# that OpenOCD numbers this register "2", not "1" (!).
#
# - Core to use Async Clocking mode (so it uses 184 MHz most
# of the time instead of limiting to the master clock rate):
# iA(31) = 1, nF(30) = 1
# - Icache on (it's disabled now, slowing i-fetches)
# I(12) = 1
# - Reserved/ones
# 6:3 = 1
arm920t cp15 2 0xc0001078
}
$_TARGETNAME configure -event reset-init {csb337_reset_init}
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