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gerrit.devboardsforandroid.linaro.org / platform / external / u-boot / 6e9e6c36a6a52562edb3e3b93cbad33f9dfe5585 / . / board / syteco / jadecpu / lowlevel_init.S
blob: b01f087895b7b7c92525ac2d8240ff68868f3fc6 [file] [log] [blame]
Matthias Weisser18a056a2010-08-09 13:31:51 +0200[diff] [blame]1/*
2 * Board specific setup info
3 *
4 * (C) Copyright 2007, mycable GmbH
5 * Carsten Schneider <cs@mycable.de>, Alexander Bigga <ab@mycable.de>
6 *
7 * (C) Copyright 2003, ARM Ltd.
8 * Philippe Robin, <philippe.robin@arm.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#include <version.h>
31#include <asm/macro.h>
32#include <asm/arch/mb86r0x.h>
Stefano Babica4814a62011-09-05 04:32:28 +0000[diff] [blame]33#include <generated/asm-offsets.h>
Matthias Weisser18a056a2010-08-09 13:31:51 +0200[diff] [blame]34
35/* Set up the platform, once the cpu has been initialized */
36.globl lowlevel_init
37lowlevel_init:
38/*
39 * Initialize Clock Reset Generator (CRG)
40 */
41
42 ldr r0, =MB86R0x_CRG_BASE
43
44 /* Not change the initial value that is set by external pin.*/
45WAIT_PLL:
46 ldr r2, [r0, #CRG_CRPR] /* Wait for PLLREADY */
47 tst r2, #MB86R0x_CRG_CRPR_PLLRDY
48 beq WAIT_PLL
49
50 /* Set clock gate control */
51 ldr r1, =CONFIG_SYS_CRG_CRHA_INIT
52 str r1, [r0, #CRG_CRHA]
53 ldr r1, =CONFIG_SYS_CRG_CRPA_INIT
54 str r1, [r0, #CRG_CRPA]
55 ldr r1, =CONFIG_SYS_CRG_CRPB_INIT
56 str r1, [r0, #CRG_CRPB]
57 ldr r1, =CONFIG_SYS_CRG_CRHB_INIT
58 str r1, [r0, #CRG_CRHB]
59 ldr r1, =CONFIG_SYS_CRG_CRAM_INIT
60 str r1, [r0, #CRG_CRAM]
61
62/*
63 * Initialize External Bus Interface
64 */
65 ldr r0, =MB86R0x_MEMC_BASE
66
67 ldr r1, =CONFIG_SYS_MEMC_MCFMODE0_INIT
68 str r1, [r0, #MEMC_MCFMODE0]
69 ldr r1, =CONFIG_SYS_MEMC_MCFMODE2_INIT
70 str r1, [r0, #MEMC_MCFMODE2]
71 ldr r1, =CONFIG_SYS_MEMC_MCFMODE4_INIT
72 str r1, [r0, #MEMC_MCFMODE4]
73
74 ldr r1, =CONFIG_SYS_MEMC_MCFTIM0_INIT
75 str r1, [r0, #MEMC_MCFTIM0]
76 ldr r1, =CONFIG_SYS_MEMC_MCFTIM2_INIT
77 str r1, [r0, #MEMC_MCFTIM2]
78 ldr r1, =CONFIG_SYS_MEMC_MCFTIM4_INIT
79 str r1, [r0, #MEMC_MCFTIM4]
80
81 ldr r1, =CONFIG_SYS_MEMC_MCFAREA0_INIT
82 str r1, [r0, #MEMC_MCFAREA0]
83 ldr r1, =CONFIG_SYS_MEMC_MCFAREA2_INIT
84 str r1, [r0, #MEMC_MCFAREA2]
85 ldr r1, =CONFIG_SYS_MEMC_MCFAREA4_INIT
86 str r1, [r0, #MEMC_MCFAREA4]
87
88/*
89 * Initialize DDR2 Controller
90 */
91
92 /* Wait for PLL LOCK up time or more */
93 wait_timer 20
94
95 /*
96 * (2) Initialize DDRIF
97 */
98 ldr r0, =MB86R0x_DDR2_BASE
99 ldr r1, =CONFIG_SYS_DDR2_DRIMS_INIT
100 strh r1, [r0, #DDR2_DRIMS]
101
102 /*
103 * (3) Wait for 20MCKPs(120nsec) or more
104 */
105 wait_timer 20
106
107 /*
108 * (4) IRESET/IUSRRST release
109 */
110 ldr r0, =MB86R0x_CCNT_BASE
111 ldr r1, =CONFIG_SYS_CCNT_CDCRC_INIT_1
112 str r1, [r0, #CCNT_CDCRC]
113
114 /*
115 * (5) Wait for 20MCKPs(120nsec) or more
116 */
117 wait_timer 20
118
119 /*
120 * (6) IDLLRST release
121 */
122 ldr r0, =MB86R0x_CCNT_BASE
123 ldr r1, =CONFIG_SYS_CCNT_CDCRC_INIT_2
124 str r1, [r0, #CCNT_CDCRC]
125
126 /*
127 * (7+8) Wait for 200us(=200000ns) or more (DDR2 Spec)
128 */
129 wait_timer 33536
130
131 /*
132 * (9) MCKE ON
133 */
134 ldr r0, =MB86R0x_DDR2_BASE
135 ldr r1, =CONFIG_SYS_DDR2_DRIC1_INIT
136 strh r1, [r0, #DDR2_DRIC1]
137 ldr r1, =CONFIG_SYS_DDR2_DRIC2_INIT
138 strh r1, [r0, #DDR2_DRIC2]
139 ldr r1, =CONFIG_SYS_DDR2_DRCA_INIT
140 strh r1, [r0, #DDR2_DRCA]
141 ldr r1, =MB86R0x_DDR2_DRCI_INIT
142 strh r1, [r0, #DDR2_DRIC]
143
144 /*
145 * (10) Initialize SDRAM
146 */
147
148 ldr r1, =MB86R0x_DDR2_DRCI_CMD
149 strh r1, [r0, #DDR2_DRIC]
150
151 wait_timer 67 /* 400ns wait */
152
153 ldr r1, =CONFIG_SYS_DDR2_INIT_DRIC1_1
154 strh r1, [r0, #DDR2_DRIC1]
155 ldr r1, =CONFIG_SYS_DDR2_INIT_DRIC2_1
156 strh r1, [r0, #DDR2_DRIC2]
157 ldr r1, =MB86R0x_DDR2_DRCI_CMD
158 strh r1, [r0, #DDR2_DRIC]
159
160 ldr r1, =CONFIG_SYS_DDR2_INIT_DRIC1_2
161 strh r1, [r0, #DDR2_DRIC1]
162 ldr r1, =CONFIG_SYS_DDR2_INIT_DRIC2_2
163 strh r1, [r0, #DDR2_DRIC2]
164 ldr r1, =MB86R0x_DDR2_DRCI_CMD
165 strh r1, [r0, #DDR2_DRIC]
166
167 ldr r1, =CONFIG_SYS_DDR2_INIT_DRIC1_3
168 strh r1, [r0, #DDR2_DRIC1]
169 ldr r1, =CONFIG_SYS_DDR2_INIT_DRIC2_3
170 strh r1, [r0, #DDR2_DRIC2]
171 ldr r1, =MB86R0x_DDR2_DRCI_CMD
172 strh r1, [r0, #DDR2_DRIC]
173
174 ldr r1, =CONFIG_SYS_DDR2_INIT_DRIC1_4
175 strh r1, [r0, #DDR2_DRIC1]
176 ldr r1, =CONFIG_SYS_DDR2_INIT_DRIC2_4
177 strh r1, [r0, #DDR2_DRIC2]
178 ldr r1, =MB86R0x_DDR2_DRCI_CMD
179 strh r1, [r0, #DDR2_DRIC]
180
181 ldr r1, =CONFIG_SYS_DDR2_INIT_DRIC1_5
182 strh r1, [r0, #DDR2_DRIC1]
183 ldr r1, =CONFIG_SYS_DDR2_INIT_DRIC2_5
184 strh r1, [r0, #DDR2_DRIC2]
185 ldr r1, =MB86R0x_DDR2_DRCI_CMD
186 strh r1, [r0, #DDR2_DRIC]
187
188 wait_timer 200
189
190 ldr r1, =CONFIG_SYS_DDR2_INIT_DRIC1_6
191 strh r1, [r0, #DDR2_DRIC1]
192 ldr r1, =CONFIG_SYS_DDR2_INIT_DRIC2_6
193 strh r1, [r0, #DDR2_DRIC2]
194 ldr r1, =MB86R0x_DDR2_DRCI_CMD
195 strh r1, [r0, #DDR2_DRIC]
196
197 ldr r1, =CONFIG_SYS_DDR2_INIT_DRIC1_7
198 strh r1, [r0, #DDR2_DRIC1]
199 ldr r1, =CONFIG_SYS_DDR2_INIT_DRIC2_7
200 strh r1, [r0, #DDR2_DRIC2]
201 ldr r1, =MB86R0x_DDR2_DRCI_CMD
202 strh r1, [r0, #DDR2_DRIC]
203
204 wait_timer 18 /* 105ns wait */
205
206 ldr r1, =CONFIG_SYS_DDR2_INIT_DRIC1_8
207 strh r1, [r0, #DDR2_DRIC1]
208 ldr r1, =CONFIG_SYS_DDR2_INIT_DRIC2_8
209 strh r1, [r0, #DDR2_DRIC2]
210 ldr r1, =MB86R0x_DDR2_DRCI_CMD
211 strh r1, [r0, #DDR2_DRIC]
212
213 wait_timer 200 /* MRS to OCD: 200clock */
214
215 ldr r1, =CONFIG_SYS_DDR2_INIT_DRIC1_9
216 strh r1, [r0, #DDR2_DRIC1]
217 ldr r1, =CONFIG_SYS_DDR2_INIT_DRIC2_9
218 strh r1, [r0, #DDR2_DRIC2]
219 ldr r1, =MB86R0x_DDR2_DRCI_CMD
220 strh r1, [r0, #DDR2_DRIC]
221
222 ldr r1, =CONFIG_SYS_DDR2_INIT_DRIC1_10
223 strh r1, [r0, #DDR2_DRIC1]
224 ldr r1, =CONFIG_SYS_DDR2_INIT_DRIC2_10
225 strh r1, [r0, #DDR2_DRIC2]
226 ldr r1, =MB86R0x_DDR2_DRCI_CMD
227 strh r1, [r0, #DDR2_DRIC]
228
229 ldr r1, =CONFIG_SYS_DDR2_DRCM_INIT
230 strh r1, [r0, #DDR2_DRCM]
231
232 ldr r1, =CONFIG_SYS_DDR2_DRCST1_INIT
233 strh r1, [r0, #DDR2_DRCST1]
234
235 ldr r1, =CONFIG_SYS_DDR2_DRCST2_INIT
236 strh r1, [r0, #DDR2_DRCST2]
237
238 ldr r1, =CONFIG_SYS_DDR2_DRCR_INIT
239 strh r1, [r0, #DDR2_DRCR]
240
241 ldr r1, =CONFIG_SYS_DDR2_DRCF_INIT
242 strh r1, [r0, #DDR2_DRCF]
243
244 ldr r1, =CONFIG_SYS_DDR2_DRASR_INIT
245 strh r1, [r0, #DDR2_DRASR]
246
247 /*
248 * (11) ODT setting
249 */
250 ldr r1, =CONFIG_SYS_DDR2_DROBS_INIT
251 strh r1, [r0, #DDR2_DROBS]
252 ldr r1, =CONFIG_SYS_DDR2_DROABA_INIT
253 strh r1, [r0, #DDR2_DROABA]
254 ldr r1, =CONFIG_SYS_DDR2_DRIBSODT1_INIT
255 strh r1, [r0, #DDR2_DRIBSODT1]
256
257 /*
258 * (12) Shift to ODTCONT ON (SDRAM side) and DDR2 usual operation mode
259 */
260 ldr r1, =CONFIG_SYS_DDR2_DROS_INIT
261 strh r1, [r0, #DDR2_DROS]
262 ldr r1, =MB86R0x_DDR2_DRCI_NORMAL
263 strh r1, [r0, #DDR2_DRIC]
264
265 mov pc, lr