2 # Glyn Tonga2 SO-DIMM CPU module (Toshiba TMPA900CMXBG, ARM9)
4 # http://toshiba-mikrocontroller.de/sites/TMPA900CPUBOARDStarter.htm
6 # Hardware on the S0-DIMM module:
7 # - Toshiba TMPA900CMXBG (ARM9, ARM926EJ-S, max. 200MHz)
8 # - DDR SDRAM: Hynix H5MS5162DFR-J3M (64Mbyte, x16, 1.8V, 166/83MHz at CL3/2)
9 # - NAND flash: Samsung K9F2G08U0B-PIB0 (256M x 8 Bit, 3.3V)
10 # - Ethernet: SMSC LAN9221I-ABZJ (10/100Mbit, Non-PCI, 16 bit interface)
13 source [find target/tmpa900.cfg]
15 ########################
16 # Target configuration #
17 ########################
19 # Initial JTAG speed should not exceed 1/6 of the initial CPU clock
20 # frequency (24MHz). Be conservative and use 1/8 of the frequency.
24 $_TARGETNAME configure -event reset-start {
25 # Upon reset, set the JTAG frequency to 3MHz again, see above.
26 echo "Setting JTAG speed to 3MHz until clocks are initialized."
32 # Disable faster memory access for now.
33 arm7_9 fast_memory_access disable
36 $_TARGETNAME configure -event reset-init {
37 # Setup clocks, and initialize SRAM and DDR SDRAM.
40 # At this point the CPU is running at 192MHz, increase JTAG speed.
41 # Tests showed that 15MHz works OK, higher speeds can cause problems,
42 # though. Not sure if this is a CPU issue or JTAG adapter issue.
43 echo "Increasing JTAG speed to 15MHz."
46 # Enable faster memory access.
47 arm7_9 fast_memory_access enable
50 proc tonga2_init { } {
51 ######################
52 # PLL initialization #
53 ######################
55 # Clock overview (see datasheet chapter 3.5.2, page 57):
56 # - fs: Low-frequency oscillator
57 # - fOSCH: High-frequency oscillator (24MHz on this board)
58 # - fPLL = fOSCH * multiplier (where multiplier can be 6 or 8)
59 # - fFCLK = fPLL / gear (where gear can be 1/2/4/8)
60 # - fHCLK is always fFCLK/2. fPCLK is also fFCLK/2.
62 # We select multiplier = 8 and gear = 1, so
63 # fFCLK = fOSCH * 8 / 1 = 192MHz.
65 # SYSCR3 (System Control Register 3): Disable and configure PLL.
66 # - PLL operation control: off
67 # - PLL constant value setting 1: always 0, as per datasheet
68 # - PLL constant value setting 2: x8 (multiplier = 8)
69 mww 0xf005000c 0x00000007
71 # SYSCR4 (System Control Register 4): Configure PLL.
72 # - PLL constant value setting 3: 140MHz or more
73 # - PLL constant value setting 4: always 1, as per datasheet
74 # - PLL constant value setting 5: 140MHz or more
75 mww 0xf0050010 0x00000065
77 # SYSCR3 (System Control Register 3): Enable PLL.
78 # - PLL operation control: on
79 # - All other bits remain set as above.
80 mww 0xf005000c 0x00000087
82 # Wait for PLL to stabilize.
85 # SYSCR2 (System Control Register 2): Switch from fOSCH to fPLL.
86 # - Selection of the PLL output clock: fPLL
87 mww 0xf0050008 0x00000002
89 # SYSCR1 (System Control Register 1):
90 # - Clock gear programming: fc/1 (i.e., gear = 1, don't divide).
91 mww 0xf0050004 0x00000000
93 # CLKCR5 (Clock Control Register 5): Set bits 3 and 6. The datasheet
94 # says the bits are reserved, but also recommends "Write as one".
95 mww 0xf0050054 0x00000048
98 ##############################################################
99 # Dynamic Memory Controller (DMC) / DDR SDRAM initialization #
100 ##############################################################
102 # PMC (Power Management Controller):
103 # PMCDRV (External Port "Driverbility" control register):
104 # Bits DRV_MEM0/DRV_MEM1 (memory relation port drive power):
105 mww 0xf0020260 0x00000003 ;# Select 1.8V +/- 0.1V
107 # Setup DDR SDRAM timing parameters for our specific chip.
108 mww 0xf4310014 0x00000004 ;# cas_latency = 2
109 mww 0xf4310018 0x00000001 ;# t_dqss = 1
110 mww 0xf431001c 0x00000002 ;# t_mrd = 2
111 mww 0xf4310020 0x0000000a ;# t_ras = 10
112 mww 0xf4310024 0x0000000a ;# t_rc = 10
113 mww 0xf4310028 0x00000013 ;# t_rcd = 3, schedule_rcd = 2
114 mww 0xf431002c 0x0000010a ;# t_rfc = 10, schedule_rfc = 8
115 mww 0xf4310030 0x00000013 ;# t_rp = 3, schedule_rp = 2
116 mww 0xf4310034 0x00000002 ;# t_rrd = 2
117 mww 0xf4310038 0x00000002 ;# t_wr = 2
118 mww 0xf431003c 0x00000001 ;# t_wtr = 1
119 mww 0xf4310040 0x0000000a ;# t_xp = 10
120 mww 0xf4310044 0x0000000c ;# t_xsr = 12
121 mww 0xf4310048 0x00000014 ;# t_esr = 20
123 # dmc_memory_cfg_5 (DMC Memory Configuration register):
124 # Set memory configuration:
125 # column_bits = 10, row_bits = 13, ap-bit = 10, power_down_prd = 0,
126 # auto_power_down = disable, stop_mem_clock = disable, memory_burst = 4
127 mww 0xf431000c 0x00010012
129 # dmc_user_config_5 (DMC user_config register):
130 # Data bus width of DDR SDRAM: 16 bit
131 mww 0xf4310304 0x00000058
133 # dmc_refresh_prd_5 (DMC Refresh Period register):
134 # Auto refresh: every 2656 (0xa60) DMCSCLK periods.
135 mww 0xf4310010 0x00000a60
137 # dmc_chip_0_cfg_5 (DMC chip_0_cfg registers):
138 # - SDRAM address structure: bank, row, column
139 # - address_match = 01000000 (start address [31:24])
140 # - address_mask = 11111100 (start address [31:24] mask value)
141 mww 0xf4310200 0x000140fc
143 # Initialize the DDR SDRAM chip.
144 # dmc_direct_cmd_5 (DMC Direct Command register).
145 # See datasheet chapter 3.10.5.1, page 268.
146 mww 0xf4310008 0x000c0000 ;# RAM init: NOP
147 mww 0xf4310008 0x00000000 ;# RAM init: Precharge all
148 mww 0xf4310008 0x00040000 ;# RAM init: Autorefresh
149 mww 0xf4310008 0x00040000 ;# RAM init: Autorefresh
150 mww 0xf4310008 0x00080032 ;# RAM init: addr_13_to_0 = 0x32
151 mww 0xf4310008 0x000c0000 ;# RAM init: NOP
152 mww 0xf4310008 0x000a0000 ;# RAM init: bank_addr = bank 2
154 # dmc_id_<0-5>_cfg_5 (DMC id_<0-5>_cfg registers):
155 # Set min./max. QoS values.
156 # - 0x5: Enable QoS, max. QoS = 1
157 # - 0xb: Enable QoS, min. QoS = 2
158 mww 0xf4310100 0x00000005 ;# AHB0: CPU Data
159 mww 0xf4310104 0x00000005 ;# AHB1: CPU Inst
160 mww 0xf4310108 0x0000000b ;# AHB2: LCDC
161 mww 0xf431010c 0x00000005 ;# AHB3: LCDDA, USB
162 mww 0xf4310110 0x00000005 ;# AHB4: DMA1
163 mww 0xf4310114 0x00000005 ;# AHB5: DMA2
165 # dmc_memc_cmd_5 (DMC Memory Controller Command register):
166 # Change DMC state to ready.
167 mww 0xf4310004 0x00000000 ;# memc_cmd = "Go"
169 # EBI: SMC Timeout register
170 mww 0xf00a0050 0x00000001 ;# smc_timeout = 1
173 ########################################################
174 # Static Memory Controller (SMC) / SRAM initialization #
175 ########################################################
177 # smc_set_cycles_5 (SMC Set Cycles register):
178 # tRC = 10, tWC = 10, tCEOE = 7, tWP = 5, tPC=2, tTR=2
179 mww 0xf4311014 0x0004afaa
181 # smc_set_opmode_5 (SMC Set Opmode register):
182 # Memory data bus width = 16 bits, async read mode, read burst
183 # length = 1 beat, async write mode, write burst length = 1 beat,
184 # byte enable (SMCBE0-1) timing = SMCCSn timing, memory burst boundary
185 # split setting = burst can cross any address boundary
186 mww 0xf4311018 0x00000001
188 # smc_direct_cmd_5 (SMC Direct Command register):
189 # cmd_type = UpdateRegs, chip_select = CS1
190 mww 0xf4311010 0x00c00000
192 echo "Clocks, SRAM, and DDR SDRAM are now initialized."
195 #######################
196 # Flash configuration #
197 #######################
199 # TODO: Implement NAND support.