98 lines
4.0 KiB
INI
98 lines
4.0 KiB
INI
# SPDX-License-Identifier: GPL-2.0-or-later
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uplevel #0 [list source [find chip/atmel/at91/at91sam9_sdramc.cfg]]
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uplevel #0 [list source [find chip/atmel/at91/at91_pmc.cfg]]
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uplevel #0 [list source [find chip/atmel/at91/at91_pio.cfg]]
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uplevel #0 [list source [find chip/atmel/at91/at91_rstc.cfg]]
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uplevel #0 [list source [find chip/atmel/at91/at91_wdt.cfg]]
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proc at91sam9_reset_start { } {
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arm7_9 fast_memory_access disable
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jtag_rclk 8
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halt
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wait_halt 10000
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set rstc_mr_val $::AT91_RSTC_KEY
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set rstc_mr_val [expr {$rstc_mr_val | (5 << 8)}]
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set rstc_mr_val [expr {$rstc_mr_val | $::AT91_RSTC_URSTEN}]
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mww $::AT91_RSTC_MR $rstc_mr_val ;# RSTC_MR : enable user reset.
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}
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proc at91sam9_reset_init { config } {
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mww $::AT91_WDT_MR $config(wdt_mr_val) ;# disable watchdog
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set ckgr_mor [expr {$::AT91_PMC_MOSCEN | (255 << 8)}]
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mww $::AT91_CKGR_MOR $ckgr_mor ;# CKGR_MOR - enable main osc.
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while { [expr {[mrw $::AT91_PMC_SR] & $::AT91_PMC_MOSCS}] != $::AT91_PMC_MOSCS } { sleep 1 }
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set pllar_val $::AT91_PMC_PLLA_WR_ERRATA ;# Bit 29 must be 1 when prog
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set pllar_val [expr {$pllar_val | $::AT91_PMC_OUT}]
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set pllar_val [expr {$pllar_val | $::AT91_PMC_PLLCOUNT}]
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set pllar_val [expr {$pllar_val | ($config(master_pll_mul) - 1) << 16}]
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set pllar_val [expr {$pllar_val | $config(master_pll_div)}]
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mww $::AT91_CKGR_PLLAR $pllar_val ;# CKGR_PLLA - (18.432MHz/13)*141 = 199.9 MHz
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while { [expr {[mrw $::AT91_PMC_SR] & $::AT91_PMC_LOCKA}] != $::AT91_PMC_LOCKA } { sleep 1 }
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;# PCK/2 = MCK Master Clock from PLLA
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set mckr_val $::AT91_PMC_CSS_PLLA
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set mckr_val [expr {$mckr_val | $::AT91_PMC_PRES_1}]
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set mckr_val [expr {$mckr_val | $::AT91SAM9_PMC_MDIV_2}]
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set mckr_val [expr {$mckr_val | $::AT91_PMC_PDIV_1}]
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mww $::AT91_PMC_MCKR $mckr_val ;# PMC_MCKR (MCLK: 0x102 - (CLK/2)MHZ, 0x202 - (CLK/3)MHz)
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while { [expr {[mrw $::AT91_PMC_SR] & $::AT91_PMC_MCKRDY}] != $::AT91_PMC_MCKRDY } { sleep 1 }
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## switch JTAG clock to highspeed clock
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jtag_rclk 0
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arm7_9 dcc_downloads enable ;# Enable faster DCC downloads
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arm7_9 fast_memory_access enable
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set rstc_mr_val $::AT91_RSTC_KEY
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set rstc_mr_val [expr {$rstc_mr_val | $::AT91_RSTC_URSTEN}]
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mww $::AT91_RSTC_MR $rstc_mr_val ;# user reset enable
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if { [info exists config(sdram_piod)] } {
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set pdr_addr [expr {$::AT91_PIOD + $::PIO_PDR}]
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set pudr_addr [expr {$::AT91_PIOD + $::PIO_PUDR}]
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set asr_addr [expr {$::AT91_PIOD + $::PIO_ASR}]
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mww $pdr_addr 0xffff0000 ;# define PDC[31:16] as DATA[31:16]
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mww $pudr_addr 0xffff0000 ;# no pull-up for D[31:16]
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mww $asr_addr 0xffff0000
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} else {
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set pdr_addr [expr {$::AT91_PIOC + $::PIO_PDR}]
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set pudr_addr [expr {$::AT91_PIOC + $::PIO_PUDR}]
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mww $pdr_addr 0xffff0000 ;# define PDC[31:16] as DATA[31:16]
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mww $pudr_addr 0xffff0000 ;# no pull-up for D[31:16]
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}
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mww $config(matrix_ebicsa_addr) $config(matrix_ebicsa_val)
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mww $::AT91_SDRAMC_MR $::AT91_SDRAMC_MODE_NORMAL ;# SDRAMC_MR Mode register
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mww $::AT91_SDRAMC_TR $config(sdram_tr_val) ;# SDRAMC_TR - Refresh Timer register
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mww $::AT91_SDRAMC_CR $config(sdram_cr_val) ;# SDRAMC_CR - Configuration register
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mww $::AT91_SDRAMC_MDR $::AT91_SDRAMC_MD_SDRAM ;# Memory Device Register -> SDRAM
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mww $::AT91_SDRAMC_MR $::AT91_SDRAMC_MODE_PRECHARGE ;# SDRAMC_MR
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mww $config(sdram_base) 0 ;# SDRAM_BASE
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mww $::AT91_SDRAMC_MR $::AT91_SDRAMC_MODE_REFRESH ;# SDRC_MR
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mww $config(sdram_base) 0 ;# SDRAM_BASE
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mww $config(sdram_base) 0 ;# SDRAM_BASE
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mww $config(sdram_base) 0 ;# SDRAM_BASE
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mww $config(sdram_base) 0 ;# SDRAM_BASE
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mww $config(sdram_base) 0 ;# SDRAM_BASE
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mww $config(sdram_base) 0 ;# SDRAM_BASE
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mww $config(sdram_base) 0 ;# SDRAM_BASE
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mww $config(sdram_base) 0 ;# SDRAM_BASE
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mww $::AT91_SDRAMC_MR $::AT91_SDRAMC_MODE_LMR ;# SDRC_MR
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mww $config(sdram_base) 0 ;# SDRAM_BASE
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mww $::AT91_SDRAMC_MR $::AT91_SDRAMC_MODE_NORMAL ;# SDRC_MR
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mww $config(sdram_base) 0 ;# SDRAM_BASE
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mww $::AT91_SDRAMC_TR 1200 ;# SDRAM_TR
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mww $config(sdram_base) 0 ;# SDRAM_BASE
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mww $::AT91_MATRIX 0xf ;# MATRIX_MCFG - REMAP all masters
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}
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