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s5pc1xx: add support SMDKC100 board
[karo-tx-uboot.git] / board / samsung / smdkc100 / mem_setup.S
1 /*
2  * Originates from Samsung's u-boot 1.1.6 port to S5PC1xx
3  *
4  * Copyright (C) 2009 Samsung Electrnoics
5  * Inki Dae <inki.dae@samsung.com>
6  * Heungjun Kim <riverful.kim@samsung.com>
7  * Minkyu Kang <mk7.kang@samsung.com>
8  * Kyungmin Park <kyungmin.park@samsung.com>
9  *
10  * See file CREDITS for list of people who contributed to this
11  * project.
12  *
13  * This program is free software; you can redistribute it and/or
14  * modify it under the terms of the GNU General Public License as
15  * published by the Free Software Foundation; either version 2 of
16  * the License, or (at your option) any later version.
17  *
18  * This program is distributed in the hope that it will be useful,
19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
21  * GNU General Public License for more details.
22  *
23  * You should have received a copy of the GNU General Public License
24  * along with this program; if not, write to the Free Software
25  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
26  * MA 02111-1307 USA
27  */
28
29 #include <config.h>
30
31         .globl mem_ctrl_asm_init
32 mem_ctrl_asm_init:
33         ldr     r6, =S5PC100_DMC_BASE                   @ 0xE6000000
34
35         /* DLL parameter setting */
36         ldr     r1, =0x50101000
37         str     r1, [r6, #0x018]                        @ PHYCONTROL0
38         ldr     r1, =0xf4
39         str     r1, [r6, #0x01C]                        @ PHYCONTROL1
40         ldr     r1, =0x0
41         str     r1, [r6, #0x020]                        @ PHYCONTROL2
42
43         /* DLL on */
44         ldr     r1, =0x50101002
45         str     r1, [r6, #0x018]                        @ PHYCONTROL0
46
47         /* DLL start */
48         ldr     r1, =0x50101003
49         str     r1, [r6, #0x018]                        @ PHYCONTROL0
50
51         /* Force value locking for DLL off */
52         str     r1, [r6, #0x018]                        @ PHYCONTROL0
53
54         /* DLL off */
55         ldr     r1, =0x50101001
56         str     r1, [r6, #0x018]                        @ PHYCONTROL0
57
58         /* auto refresh off */
59         ldr     r1, =0xff001010
60         str     r1, [r6, #0x000]                        @ CONCONTROL
61
62         /*
63          * Burst Length 4, 2 chips, 32-bit, LPDDR
64          * OFF: dynamic self refresh, force precharge, dynamic power down off
65          */
66         ldr     r1, =0x00212100
67         str     r1, [r6, #0x004]                        @ MEMCONTROL
68
69         /*
70          * Note:
71          * If Bank0 has OneDRAM we place it at 0x2800'0000
72          * So finally Bank1 should address start at at 0x2000'0000
73          */
74         mov     r4, #0x0
75
76 swap_memory:
77         /*
78          * Bank0
79          * 0x30 -> 0x30000000
80          * 0xf8 -> 0x37FFFFFF
81          * [15:12] 0: Linear
82          * [11:8 ] 2: 9 bits
83          * [ 7:4 ] 2: 14 bits
84          * [ 3:0 ] 2: 4 banks
85          */
86         ldr     r1, =0x30f80222
87         /* if r4 is 1, swap the bank */
88         cmp     r4, #0x1
89         orreq   r1, r1, #0x08000000
90         str     r1, [r6, #0x008]                        @ MEMCONFIG0
91
92         /*
93          * Bank1
94          * 0x38 -> 0x38000000
95          * 0xf8 -> 0x3fFFFFFF
96          * [15:12] 0: Linear
97          * [11:8 ] 2: 9 bits
98          * [ 7:4 ] 2: 14 bits
99          * [ 3:0 ] 2: 4 banks
100          */
101         ldr     r1, =0x38f80222
102         /* if r4 is 1, swap the bank */
103         cmp     r4, #0x1
104         biceq   r1, r1, #0x08000000
105         str     r1, [r6, #0x00c]                        @ MEMCONFIG1
106
107         ldr     r1, =0x20000000
108         str     r1, [r6, #0x014]                        @ PRECHCONFIG
109
110         /*
111          * FIXME: Please verify these values
112          * 7.8us * 166MHz %LE %LONG1294(0x50E)
113          * 7.8us * 133MHz %LE %LONG1038(0x40E),
114          * 7.8us * 100MHz %LE %LONG780(0x30C),
115          * 7.8us * 20MHz  %LE %LONG156(0x9C),
116          * 7.8us * 10MHz  %LE %LONG78(0x4E)
117          */
118         ldr     r1, =0x0000050e
119         str     r1, [r6, #0x030]                        @ TIMINGAREF
120
121         /* 166 MHz */
122         ldr     r1, =0x0c233287
123         str     r1, [r6, #0x034]                        @ TIMINGROW
124
125         /* twtr=3 twr=2 trtp=3 cl=3 wl=3 rl=3 */
126         ldr     r1, =0x32330303
127         str     r1, [r6, #0x038]                        @ TIMINGDATA
128
129         /* tfaw=4 sxsr=0x14 txp=0x14 tcke=3 tmrd=3 */
130         ldr     r1, =0x04141433
131         str     r1, [r6, #0x03C]                        @ TIMINGPOWER
132
133         /* chip0 Deselect */
134         ldr     r1, =0x07000000
135         str     r1, [r6, #0x010]                        @ DIRECTCMD
136
137         /* chip0 PALL */
138         ldr     r1, =0x01000000
139         str     r1, [r6, #0x010]                        @ DIRECTCMD
140
141         /* chip0 REFA */
142         ldr     r1, =0x05000000
143         str     r1, [r6, #0x010]                        @ DIRECTCMD
144         /* chip0 REFA */
145         str     r1, [r6, #0x010]                        @ DIRECTCMD
146
147         /* chip0 MRS, CL%LE %LONG3, BL%LE %LONG4 */
148         ldr     r1, =0x00000032
149         str     r1, [r6, #0x010]                        @ DIRECTCMD
150
151         /* chip1 Deselect */
152         ldr     r1, =0x07100000
153         str     r1, [r6, #0x010]                        @ DIRECTCMD
154
155         /* chip1 PALL */
156         ldr     r1, =0x01100000
157         str     r1, [r6, #0x010]                        @ DIRECTCMD
158
159         /* chip1 REFA */
160         ldr     r1, =0x05100000
161         str     r1, [r6, #0x010]                        @ DIRECTCMD
162         /* chip1 REFA */
163         str     r1, [r6, #0x010]                        @ DIRECTCMD
164
165         /* chip1 MRS, CL%LE %LONG3, BL%LE %LONG4 */
166         ldr     r1, =0x00100032
167         str     r1, [r6, #0x010]                        @ DIRECTCMD
168
169         /* auto refresh on */
170         ldr     r1, =0xff002030
171         str     r1, [r6, #0x000]                        @ CONCONTROL
172
173         /* PwrdnConfig */
174         ldr     r1, =0x00100002
175         str     r1, [r6, #0x028]                        @ PWRDNCONFIG
176
177         /* BL%LE %LONG */
178         ldr     r1, =0xff212100
179         str     r1, [r6, #0x004]                        @ MEMCONTROL
180
181
182         /* Try to test memory area */
183         cmp     r4, #0x1
184         beq     1f
185
186         mov     r4, #0x1
187         ldr     r1, =0x37ffff00
188         str     r4, [r1]
189         str     r4, [r1, #0x4]                          @ dummy write
190         ldr     r0, [r1]
191         cmp     r0, r4
192         bne     swap_memory
193
194 1:
195         mov     pc, lr
196
197         .ltorg