1 # SPDX-License-Identifier: GPL-2.0-or-later
3 # Elector Internet Radio board
4 # http://www.ethernut.de/en/hardware/eir/index.html
6 source [find target/at91sam7se512.cfg]
8 $_TARGETNAME configure -event reset-init {
9 # WDT_MR, disable watchdog
10 mww 0xFFFFFD44 0x00008000
12 # RSTC_MR, enable user reset
13 mww 0xfffffd08 0xa5000001
16 mww 0xFFFFFC20 0x00000601
20 mww 0xFFFFFC2C 0x00481c0e
24 mww 0xFFFFFC30 0x00000007
28 mww 0xFFFFFF60 0x00480100
31 # Enable SDRAM interface.
34 # Enable SDRAM control at PIO A.
35 mww 0xfffff474 0x3f800000 ;# PIO_BSR_OFF
36 mww 0xfffff404 0x3f800000 ;# PIO_PDR_OFF
38 # Enable address bus (A0, A2-A11, A13-A17) at PIO B
39 mww 0xfffff674 0x0003effd ;# PIO_BSR_OFF
40 mww 0xfffff604 0x0003effd ;# PIO_PDR_OFF
42 # Enable 16 bit data bus at PIO C
43 mww 0xfffff870 0x0000ffff ;# PIO_ASR_OFF
44 mww 0xfffff804 0x0000ffff ;# PIO_PDR_OFF
46 # Enable SDRAM chip select
47 mww 0xffffff80 0x00000002 ;# EBI_CSA_OFF
49 # Set SDRAM characteristics in configuration register.
50 # Hard coded values for MT48LC32M16A2 with 48MHz CPU.
51 mww 0xffffffb8 0x2192215a ;# SDRAMC_CR_OFF
54 # Issue 16 bit SDRAM command: NOP
55 mww 0xffffffb0 0x00000011 ;# SDRAMC_MR_OFF
56 mww 0x20000000 0x00000000
58 # Issue 16 bit SDRAM command: Precharge all
59 mww 0xffffffb0 0x00000012 ;# SDRAMC_MR_OFF
60 mww 0x20000000 0x00000000
62 # Issue 8 auto-refresh cycles
63 mww 0xffffffb0 0x00000014 ;# SDRAMC_MR_OFF
64 mww 0x20000000 0x00000000
65 mww 0xffffffb0 0x00000014 ;# SDRAMC_MR_OFF
66 mww 0x20000000 0x00000000
67 mww 0xffffffb0 0x00000014 ;# SDRAMC_MR_OFF
68 mww 0x20000000 0x00000000
69 mww 0xffffffb0 0x00000014 ;# SDRAMC_MR_OFF
70 mww 0x20000000 0x00000000
71 mww 0xffffffb0 0x00000014 ;# SDRAMC_MR_OFF
72 mww 0x20000000 0x00000000
73 mww 0xffffffb0 0x00000014 ;# SDRAMC_MR_OFF
74 mww 0x20000000 0x00000000
75 mww 0xffffffb0 0x00000014 ;# SDRAMC_MR_OFF
76 mww 0x20000000 0x00000000
77 mww 0xffffffb0 0x00000014 ;# SDRAMC_MR_OFF
78 mww 0x20000000 0x00000000
80 # Issue 16 bit SDRAM command: Set mode register
81 mww 0xffffffb0 0x00000013 ;# SDRAMC_MR_OFF
82 mww 0x20000014 0xcafedede
84 # Set refresh rate count ???
85 mww 0xffffffb4 0x00000013 ;# SDRAMC_TR_OFF
87 # Issue 16 bit SDRAM command: Normal mode
88 mww 0xffffffb0 0x00000010 ;# SDRAMC_MR_OFF
89 mww 0x20000000 0x00000180
92 # Enable external reset key.
94 mww 0xfffffd08 0xa5000001