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gerrit.cesnet.cz / github / trini / u-boot / 173d294b94cfec10063a5be40934d6d8fb7981ce / . / board / syteco / jadecpu / lowlevel_init.S
blob: 9568cec9a86a74b0b3306d32a7788926539287df [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 *
Wolfgang Denk1a459662013-07-08 09:37:19 +0200[diff] [blame]10 * SPDX-License-Identifier: GPL-2.0+
Matthias Weisser18a056a2010-08-09 13:31:51 +0200[diff] [blame]11 */
12
13#include <config.h>
14#include <version.h>
15#include <asm/macro.h>
16#include <asm/arch/mb86r0x.h>
Stefano Babica4814a62011-09-05 04:32:28 +0000[diff] [blame]17#include <generated/asm-offsets.h>
Matthias Weisser18a056a2010-08-09 13:31:51 +0200[diff] [blame]18
19/* Set up the platform, once the cpu has been initialized */
20.globl lowlevel_init
21lowlevel_init:
22/*
23 * Initialize Clock Reset Generator (CRG)
24 */
25
26 ldr r0, =MB86R0x_CRG_BASE
27
28 /* Not change the initial value that is set by external pin.*/
29WAIT_PLL:
30 ldr r2, [r0, #CRG_CRPR] /* Wait for PLLREADY */
31 tst r2, #MB86R0x_CRG_CRPR_PLLRDY
32 beq WAIT_PLL
33
34 /* Set clock gate control */
35 ldr r1, =CONFIG_SYS_CRG_CRHA_INIT
36 str r1, [r0, #CRG_CRHA]
37 ldr r1, =CONFIG_SYS_CRG_CRPA_INIT
38 str r1, [r0, #CRG_CRPA]
39 ldr r1, =CONFIG_SYS_CRG_CRPB_INIT
40 str r1, [r0, #CRG_CRPB]
41 ldr r1, =CONFIG_SYS_CRG_CRHB_INIT
42 str r1, [r0, #CRG_CRHB]
43 ldr r1, =CONFIG_SYS_CRG_CRAM_INIT
44 str r1, [r0, #CRG_CRAM]
45
46/*
47 * Initialize External Bus Interface
48 */
49 ldr r0, =MB86R0x_MEMC_BASE
50
51 ldr r1, =CONFIG_SYS_MEMC_MCFMODE0_INIT
52 str r1, [r0, #MEMC_MCFMODE0]
53 ldr r1, =CONFIG_SYS_MEMC_MCFMODE2_INIT
54 str r1, [r0, #MEMC_MCFMODE2]
55 ldr r1, =CONFIG_SYS_MEMC_MCFMODE4_INIT
56 str r1, [r0, #MEMC_MCFMODE4]
57
58 ldr r1, =CONFIG_SYS_MEMC_MCFTIM0_INIT
59 str r1, [r0, #MEMC_MCFTIM0]
60 ldr r1, =CONFIG_SYS_MEMC_MCFTIM2_INIT
61 str r1, [r0, #MEMC_MCFTIM2]
62 ldr r1, =CONFIG_SYS_MEMC_MCFTIM4_INIT
63 str r1, [r0, #MEMC_MCFTIM4]
64
65 ldr r1, =CONFIG_SYS_MEMC_MCFAREA0_INIT
66 str r1, [r0, #MEMC_MCFAREA0]
67 ldr r1, =CONFIG_SYS_MEMC_MCFAREA2_INIT
68 str r1, [r0, #MEMC_MCFAREA2]
69 ldr r1, =CONFIG_SYS_MEMC_MCFAREA4_INIT
70 str r1, [r0, #MEMC_MCFAREA4]
71
72/*
73 * Initialize DDR2 Controller
74 */
75
76 /* Wait for PLL LOCK up time or more */
77 wait_timer 20
78
79 /*
80 * (2) Initialize DDRIF
81 */
82 ldr r0, =MB86R0x_DDR2_BASE
83 ldr r1, =CONFIG_SYS_DDR2_DRIMS_INIT
84 strh r1, [r0, #DDR2_DRIMS]
85
86 /*
87 * (3) Wait for 20MCKPs(120nsec) or more
88 */
89 wait_timer 20
90
91 /*
92 * (4) IRESET/IUSRRST release
93 */
94 ldr r0, =MB86R0x_CCNT_BASE
95 ldr r1, =CONFIG_SYS_CCNT_CDCRC_INIT_1
96 str r1, [r0, #CCNT_CDCRC]
97
98 /*
99 * (5) Wait for 20MCKPs(120nsec) or more
100 */
101 wait_timer 20
102
103 /*
104 * (6) IDLLRST release
105 */
106 ldr r0, =MB86R0x_CCNT_BASE
107 ldr r1, =CONFIG_SYS_CCNT_CDCRC_INIT_2
108 str r1, [r0, #CCNT_CDCRC]
109
110 /*
111 * (7+8) Wait for 200us(=200000ns) or more (DDR2 Spec)
112 */
113 wait_timer 33536
114
115 /*
116 * (9) MCKE ON
117 */
118 ldr r0, =MB86R0x_DDR2_BASE
119 ldr r1, =CONFIG_SYS_DDR2_DRIC1_INIT
120 strh r1, [r0, #DDR2_DRIC1]
121 ldr r1, =CONFIG_SYS_DDR2_DRIC2_INIT
122 strh r1, [r0, #DDR2_DRIC2]
123 ldr r1, =CONFIG_SYS_DDR2_DRCA_INIT
124 strh r1, [r0, #DDR2_DRCA]
125 ldr r1, =MB86R0x_DDR2_DRCI_INIT
126 strh r1, [r0, #DDR2_DRIC]
127
128 /*
129 * (10) Initialize SDRAM
130 */
131
132 ldr r1, =MB86R0x_DDR2_DRCI_CMD
133 strh r1, [r0, #DDR2_DRIC]
134
135 wait_timer 67 /* 400ns wait */
136
137 ldr r1, =CONFIG_SYS_DDR2_INIT_DRIC1_1
138 strh r1, [r0, #DDR2_DRIC1]
139 ldr r1, =CONFIG_SYS_DDR2_INIT_DRIC2_1
140 strh r1, [r0, #DDR2_DRIC2]
141 ldr r1, =MB86R0x_DDR2_DRCI_CMD
142 strh r1, [r0, #DDR2_DRIC]
143
144 ldr r1, =CONFIG_SYS_DDR2_INIT_DRIC1_2
145 strh r1, [r0, #DDR2_DRIC1]
146 ldr r1, =CONFIG_SYS_DDR2_INIT_DRIC2_2
147 strh r1, [r0, #DDR2_DRIC2]
148 ldr r1, =MB86R0x_DDR2_DRCI_CMD
149 strh r1, [r0, #DDR2_DRIC]
150
151 ldr r1, =CONFIG_SYS_DDR2_INIT_DRIC1_3
152 strh r1, [r0, #DDR2_DRIC1]
153 ldr r1, =CONFIG_SYS_DDR2_INIT_DRIC2_3
154 strh r1, [r0, #DDR2_DRIC2]
155 ldr r1, =MB86R0x_DDR2_DRCI_CMD
156 strh r1, [r0, #DDR2_DRIC]
157
158 ldr r1, =CONFIG_SYS_DDR2_INIT_DRIC1_4
159 strh r1, [r0, #DDR2_DRIC1]
160 ldr r1, =CONFIG_SYS_DDR2_INIT_DRIC2_4
161 strh r1, [r0, #DDR2_DRIC2]
162 ldr r1, =MB86R0x_DDR2_DRCI_CMD
163 strh r1, [r0, #DDR2_DRIC]
164
165 ldr r1, =CONFIG_SYS_DDR2_INIT_DRIC1_5
166 strh r1, [r0, #DDR2_DRIC1]
167 ldr r1, =CONFIG_SYS_DDR2_INIT_DRIC2_5
168 strh r1, [r0, #DDR2_DRIC2]
169 ldr r1, =MB86R0x_DDR2_DRCI_CMD
170 strh r1, [r0, #DDR2_DRIC]
171
172 wait_timer 200
173
174 ldr r1, =CONFIG_SYS_DDR2_INIT_DRIC1_6
175 strh r1, [r0, #DDR2_DRIC1]
176 ldr r1, =CONFIG_SYS_DDR2_INIT_DRIC2_6
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_7
182 strh r1, [r0, #DDR2_DRIC1]
183 ldr r1, =CONFIG_SYS_DDR2_INIT_DRIC2_7
184 strh r1, [r0, #DDR2_DRIC2]
185 ldr r1, =MB86R0x_DDR2_DRCI_CMD
186 strh r1, [r0, #DDR2_DRIC]
187
188 wait_timer 18 /* 105ns wait */
189
190 ldr r1, =CONFIG_SYS_DDR2_INIT_DRIC1_8
191 strh r1, [r0, #DDR2_DRIC1]
192 ldr r1, =CONFIG_SYS_DDR2_INIT_DRIC2_8
193 strh r1, [r0, #DDR2_DRIC2]
194 ldr r1, =MB86R0x_DDR2_DRCI_CMD
195 strh r1, [r0, #DDR2_DRIC]
196
197 wait_timer 200 /* MRS to OCD: 200clock */
198
199 ldr r1, =CONFIG_SYS_DDR2_INIT_DRIC1_9
200 strh r1, [r0, #DDR2_DRIC1]
201 ldr r1, =CONFIG_SYS_DDR2_INIT_DRIC2_9
202 strh r1, [r0, #DDR2_DRIC2]
203 ldr r1, =MB86R0x_DDR2_DRCI_CMD
204 strh r1, [r0, #DDR2_DRIC]
205
206 ldr r1, =CONFIG_SYS_DDR2_INIT_DRIC1_10
207 strh r1, [r0, #DDR2_DRIC1]
208 ldr r1, =CONFIG_SYS_DDR2_INIT_DRIC2_10
209 strh r1, [r0, #DDR2_DRIC2]
210 ldr r1, =MB86R0x_DDR2_DRCI_CMD
211 strh r1, [r0, #DDR2_DRIC]
212
213 ldr r1, =CONFIG_SYS_DDR2_DRCM_INIT
214 strh r1, [r0, #DDR2_DRCM]
215
216 ldr r1, =CONFIG_SYS_DDR2_DRCST1_INIT
217 strh r1, [r0, #DDR2_DRCST1]
218
219 ldr r1, =CONFIG_SYS_DDR2_DRCST2_INIT
220 strh r1, [r0, #DDR2_DRCST2]
221
222 ldr r1, =CONFIG_SYS_DDR2_DRCR_INIT
223 strh r1, [r0, #DDR2_DRCR]
224
225 ldr r1, =CONFIG_SYS_DDR2_DRCF_INIT
226 strh r1, [r0, #DDR2_DRCF]
227
228 ldr r1, =CONFIG_SYS_DDR2_DRASR_INIT
229 strh r1, [r0, #DDR2_DRASR]
230
231 /*
232 * (11) ODT setting
233 */
234 ldr r1, =CONFIG_SYS_DDR2_DROBS_INIT
235 strh r1, [r0, #DDR2_DROBS]
236 ldr r1, =CONFIG_SYS_DDR2_DROABA_INIT
237 strh r1, [r0, #DDR2_DROABA]
238 ldr r1, =CONFIG_SYS_DDR2_DRIBSODT1_INIT
239 strh r1, [r0, #DDR2_DRIBSODT1]
240
241 /*
242 * (12) Shift to ODTCONT ON (SDRAM side) and DDR2 usual operation mode
243 */
244 ldr r1, =CONFIG_SYS_DDR2_DROS_INIT
245 strh r1, [r0, #DDR2_DROS]
246 ldr r1, =MB86R0x_DDR2_DRCI_NORMAL
247 strh r1, [r0, #DDR2_DRIC]
248
249 mov pc, lr