tinyriscv-openocd/tcl/chip/atmel/at91/at91sam9_init.cfg

uplevel #0 [list source [find chip/atmel/at91/at91sam9_sdramc.cfg]]
uplevel #0 [list source [find chip/atmel/at91/at91_pmc.cfg]]
uplevel #0 [list source [find chip/atmel/at91/at91_pio.cfg]]
uplevel #0 [list source [find chip/atmel/at91/at91_rstc.cfg]]
uplevel #0 [list source [find chip/atmel/at91/at91_wdt.cfg]]

proc at91sam9_reset_start { } {

	arm7_9 fast_memory_access disable

	jtag_rclk 8
	halt
	wait_halt 10000
	set rstc_mr_val [expr $::AT91_RSTC_KEY]
	set rstc_mr_val [expr ($rstc_mr_val | (5 << 8))]
	set rstc_mr_val [expr ($rstc_mr_val | $::AT91_RSTC_URSTEN)]
	mww $::AT91_RSTC_MR $rstc_mr_val	;# RSTC_MR : enable user reset.
}

proc at91sam9_reset_init { config } {

	mww $::AT91_WDT_MR $config(wdt_mr_val)	;# disable watchdog

	set ckgr_mor [expr ($::AT91_PMC_MOSCEN | (255 << 8))]

	mww $::AT91_CKGR_MOR $ckgr_mor	;# CKGR_MOR - enable main osc.
	while { [expr [mrw $::AT91_PMC_SR] & $::AT91_PMC_MOSCS] != $::AT91_PMC_MOSCS } { sleep 1 }

	set pllar_val	[expr $::AT91_PMC_PLLA_WR_ERRATA] ;# Bit 29 must be 1 when prog
	set pllar_val	[expr ($pllar_val | $::AT91_PMC_OUT)]
	set pllar_val	[expr ($pllar_val | $::AT91_PMC_PLLCOUNT)]
	set pllar_val	[expr ($pllar_val | ($config(master_pll_mul) - 1) << 16)]
	set pllar_val	[expr ($pllar_val | $config(master_pll_div))]

	mww $::AT91_CKGR_PLLAR $pllar_val	 ;# CKGR_PLLA - (18.432MHz/13)*141 = 199.9 MHz
	while { [expr [mrw $::AT91_PMC_SR] & $::AT91_PMC_LOCKA] != $::AT91_PMC_LOCKA } { sleep 1 }

	;# PCK/2 = MCK Master Clock from PLLA
	set mckr_val	[expr $::AT91_PMC_CSS_PLLA]
	set mckr_val	[expr ($mckr_val | $::AT91_PMC_PRES_1)]
	set mckr_val	[expr ($mckr_val | $::AT91SAM9_PMC_MDIV_2)]
	set mckr_val	[expr ($mckr_val | $::AT91_PMC_PDIV_1)]

	mww $::AT91_PMC_MCKR $mckr_val	;# PMC_MCKR (MCLK: 0x102 - (CLK/2)MHZ, 0x202 - (CLK/3)MHz)
	while { [expr [mrw $::AT91_PMC_SR] & $::AT91_PMC_MCKRDY] != $::AT91_PMC_MCKRDY } { sleep 1 }

	## switch JTAG clock to highspeed clock
	jtag_rclk 0

	arm7_9 dcc_downloads enable	;# Enable faster DCC downloads
	arm7_9 fast_memory_access enable

	set rstc_mr_val [expr ($::AT91_RSTC_KEY)]
	set rstc_mr_val [expr ($rstc_mr_val | $::AT91_RSTC_URSTEN)]
	mww $::AT91_RSTC_MR $rstc_mr_val	;# user reset enable

	if { [info exists config(sdram_piod)] } {
		set pdr_addr	[expr ($::AT91_PIOD + $::PIO_PDR)]
		set pudr_addr	[expr ($::AT91_PIOD + $::PIO_PUDR)]
		set asr_addr	[expr ($::AT91_PIOD + $::PIO_ASR)]
		mww $pdr_addr 0xffff0000				;# define PDC[31:16] as DATA[31:16]
		mww $pudr_addr 0xffff0000				;# no pull-up for D[31:16]
		mww $asr_addr 0xffff0000
	} else {
		set pdr_addr	[expr ($::AT91_PIOC + $::PIO_PDR)]
		set pudr_addr	[expr ($::AT91_PIOC + $::PIO_PUDR)]
		mww $pdr_addr 0xffff0000				;# define PDC[31:16] as DATA[31:16]
		mww $pudr_addr 0xffff0000				;# no pull-up for D[31:16]
	}

	mww $config(matrix_ebicsa_addr) $config(matrix_ebicsa_val)
	mww $::AT91_SDRAMC_MR	$::AT91_SDRAMC_MODE_NORMAL	;# SDRAMC_MR Mode register
	mww $::AT91_SDRAMC_TR	$config(sdram_tr_val)		;# SDRAMC_TR - Refresh Timer register
	mww $::AT91_SDRAMC_CR	$config(sdram_cr_val)		;# SDRAMC_CR - Configuration register
	mww $::AT91_SDRAMC_MDR	$::AT91_SDRAMC_MD_SDRAM		;# Memory Device Register -> SDRAM
	mww $::AT91_SDRAMC_MR	$::AT91_SDRAMC_MODE_PRECHARGE	;# SDRAMC_MR
	mww $config(sdram_base)	0				;# SDRAM_BASE
	mww $::AT91_SDRAMC_MR	$::AT91_SDRAMC_MODE_REFRESH	;# SDRC_MR
	mww $config(sdram_base)	0				;# SDRAM_BASE
	mww $config(sdram_base)	0				;# SDRAM_BASE
	mww $config(sdram_base)	0				;# SDRAM_BASE
	mww $config(sdram_base)	0				;# SDRAM_BASE
	mww $config(sdram_base)	0				;# SDRAM_BASE
	mww $config(sdram_base)	0				;# SDRAM_BASE
	mww $config(sdram_base)	0				;# SDRAM_BASE
	mww $config(sdram_base)	0				;# SDRAM_BASE
	mww $::AT91_SDRAMC_MR	$::AT91_SDRAMC_MODE_LMR		;# SDRC_MR
	mww $config(sdram_base)	0				;# SDRAM_BASE
	mww $::AT91_SDRAMC_MR	$::AT91_SDRAMC_MODE_NORMAL	;# SDRC_MR
	mww $config(sdram_base)	0				;# SDRAM_BASE
	mww $::AT91_SDRAMC_TR	1200				;# SDRAM_TR
	mww $config(sdram_base)	0				;# SDRAM_BASE

	mww $::AT91_MATRIX 0xf		;# MATRIX_MCFG - REMAP all masters
}