Add board config for Embedded Artists LPC2478-32

tcl/board/embedded-artists_lpc2478-32.cfg

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+# Embedded Artists eval board for LPC2478
+# http://www.embeddedartists.com/
+
+# Delays on reset lines
+adapter_nsrst_delay 500
+jtag_ntrst_delay 1
+
+# Adaptive JTAG clocking through RTCK.
+# 
+jtag_rclk 20
+
+# Target device: LPC2478
+set CCLK 72000
+source [find target/lpc2478.cfg]
+
+# A working area will help speeding the flash programming
+$_TARGETNAME configure -work-area-phys 0x40000200 -work-area-size [expr 0x10000-0x200-0x20] -work-area-backup 0
+
+# External 16-bit flash at chip select CS0 (SST39VF3201-70, 4 MiB)
+flash bank $_CHIPNAME.extflash cfi 0x80000000 0x400000 2 2 $_TARGETNAME jedec_probe
+
+# Helper
+#
+proc read_register {register} {
+    set result ""
+    mem2array result 32 $register 1
+    return $result(0)
+}
+
+
+# Enable the PLL.
+# Generate maximum CPU clock (72 MHz) Run from internal RC oscillator.
+# Note: The PLL output runs at a frequency N times the desired CPU clock.
+#       It in unavoidable that the CPU clock drops down to (4 MHz/N) during
+#       the initialization!
+#       Here: N=4
+#       Note that if the PLL is already active at the time this script is
+#       called, the effective value of N is the value of CCLKCFG at that time!
+#
+proc enable_pll {} {
+    # Disconnect PLL in case it is already connected
+    if {[expr [read_register 0xE01FC080] & 0x03] == 3} {
+        # Disconnect it, but leave it enabled
+        # (This MUST be done in two steps)
+        mww 0xE01FC080 0x00000001       # PLLCON: disconnect PLL
+        mww 0xE01FC08C 0x000000AA       # PLLFEED
+        mww 0xE01FC08C 0x00000055       # PLLFEED
+    }
+    # Disable PLL (as it might already be enabled at this time!)
+    mww 0xE01FC080 0x00000000       # PLLCON: disable PLL
+    mww 0xE01FC08C 0x000000AA       # PLLFEED
+    mww 0xE01FC08C 0x00000055       # PLLFEED
+
+    # Setup PLL to generate 288 MHz from internal RC oscillator
+    mww 0xE01FC10C 0x00000000       # CLKSRCSEL: IRC
+    mww 0xE01FC084 0x00000023       # PLLCFG: N=1, M=36
+    mww 0xE01FC08C 0x000000AA       # PLLFEED
+    mww 0xE01FC08C 0x00000055       # PLLFEED
+    mww 0xE01FC080 0x00000001       # PLLCON: enable PLL
+    mww 0xE01FC08C 0x000000AA       # PLLFEED
+    mww 0xE01FC08C 0x00000055       # PLLFEED
+    sleep 100
+    mww 0xE01FC104 0x00000003       # CCLKCFG: divide by 4 (72 MHz)
+    mww 0xE01FC080 0x00000003       # PLLCON: connect PLL
+    mww 0xE01FC08C 0x000000AA       # PLLFEED
+    mww 0xE01FC08C 0x00000055       # PLLFEED
+}
+
+
+# Event handlers
+#
+$_TARGETNAME configure -event reset-start {
+    # Back to the slow JTAG clock
+    jtag_rclk 20
+}
+
+
+$_TARGETNAME configure -event reset-init {
+
+    arm core_state arm
+    arm7_9 dcc_downloads enable     # Speed up downloads by using DCC transfer
+    arm7_9 fast_memory_access enable
+
+    # Peripheral clocks
+    mww 0xE01FC0C4 0x04280FFE       # PCONP: (reset value)
+
+    # Map the user flash to the vector table area (0x00...0x3F)
+    mww 0xE01FC040 0x00000001       # MEMMAP: User flash
+
+    # Memory accelerator module
+    mww 0xE01FC004 0x00000003       # MAMTIM: 3 clock cycles
+    mww 0xE01FC000 0x00000002       # MAMCR: fully enabled
+
+    # Enable external memory bus (32-bit SDRAM at DYCS0, 16-bit flash at CS0)
+    mww 0xE002C014 0x55010115       # PINSEL5: P2.16=CAS, P2.17=RAS, P2.18=CLKOUT0,
+                                    # P2.20=DYCS0, P2.24=CKEOUT0, P2.28=DQMOUT0,
+                                    # P2.29=DQMOUT1, P2.30=DQMOUT2, P2.31=DQMOUT3
+    mww 0xE002C018 0x55555555       # PINSEL6: P3.0...P3.15=D0...D15
+    mww 0xE002C01C 0x55555555       # PINSEL7: P3.16...P3.31=D16...D31
+    mww 0xE002C020 0x55555555       # PINSEL8: P4.0...P4.15=A0...A15
+    mww 0xE002C024 0x50051555       # PINSEL9: P4.16...P4.22=A16...A22, P4.24=OE,
+                                    # P4.25=WE, P4.30=CS0, P4.31=CS1
+    mww 0xFFE08000 0x00000001       # EMCControl: Enable EMC
+
+    # Start PLL, then use faster JTAG clock
+    enable_pll
+    jtag_rclk 3000
+
+    # 16-bit flash @ CS0 (SST39VF3201-70)
+    mww 0xFFE08200 0x00080081       # EMCStaticConfig0: 16 bit, PB=1, buffers on
+    mww 0xFFE08204 0x00000000       # EMCStaticWaitWen0
+    mww 0xFFE08208 0x00000000       # EMCStaticWaitOen0
+    mww 0xFFE0820C 0x00000005       # EMCStaticWaitRd0
+    mww 0xFFE08210 0x00000005       # EMCStaticWaitPage0
+    mww 0xFFE08214 0x00000003       # EMCStaticWaitWr0
+    mww 0xFFE08218 0x00000001       # EMCStaticWaitTurn0
+
+    # 8-bit NAND @ CS1
+    # TODO
+
+    # 32-bit SDRAM @ DYCS0 (K4M563233G-HN75)
+    mww 0xFFE08028 0x00000001       # EMCDynamicReadConfig
+    mww 0xFFE08030 0x00000001       # EMCDynamicRP
+    mww 0xFFE08034 0x00000003       # EMCDynamicRAS
+    mww 0xFFE08038 0x00000005       # EMCDynamicSREX
+    mww 0xFFE0803C 0x00000001       # EMCDynamicAPR
+    mww 0xFFE08040 0x00000005       # EMCDynamicDAL
+    mww 0xFFE08044 0x00000001       # EMCDynamicWR
+    mww 0xFFE08048 0x00000005       # EMCDynamicRC
+    mww 0xFFE0804C 0x00000005       # EMCDynamicRFC
+    mww 0xFFE08050 0x00000005       # EMCDynamicXSR
+    mww 0xFFE08054 0x00000001       # EMCDynamicRRD
+    mww 0xFFE08058 0x00000001       # EMCDynamicMRD
+    #
+    mww 0xFFE08104 0x00000202       # EMCDynamicRasCas0
+    mww 0xFFE08100 0x00005488       # EMCDynamicConfig0
+    sleep 100
+    mww 0xFFE08020 0x00000183       # EMCDynamicControl: Clock on continuously, NOP
+    sleep 10
+    mww 0xFFE08020 0x00000103       # EMCDynamicControl: PRECHARGE-ALL
+    mww 0xFFE08024 0x00000046       # EMCDynamicRefresh
+    sleep 100
+    mww 0xFFE08020 0x00000083       # EMCDynamicControl: MODE
+    mdw 0xA0011000 1                # Set SDRAM mode register
+    mww 0xFFE08020 0x00000000       # EMCDynamicControl: NORMAL
+    mww 0xFFE08100 0x00085488       # EMCDynamicConfig0: Enable buffers
+}
+