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gerrit.devboardsforandroid.linaro.org / platform / external / u-boot / 392ba5256ab9bf017a9b7320ef0cee98862c908d / . / board / freescale / mx35pdk / lowlevel_init.S
blob: 5dc3cb0f4b1a6252d96460b79c418e976e5596b8 [file] [log] [blame]
Stefano Babiceae49882011-01-20 08:05:15 +0000[diff] [blame]1/*
2 * Copyright (C) 2007, Guennadi Liakhovetski <lg@denx.de>
3 *
4 * (C) Copyright 2008-2010 Freescale Semiconductor, Inc.
5 *
Wolfgang Denk1a459662013-07-08 09:37:19 +0200[diff] [blame]6 * SPDX-License-Identifier: GPL-2.0+
Stefano Babiceae49882011-01-20 08:05:15 +0000[diff] [blame]7 */
8
9#include <config.h>
10#include <asm/arch/imx-regs.h>
Stefano Babica4814a62011-09-05 04:32:28 +0000[diff] [blame]11#include <generated/asm-offsets.h>
Stefano Babiceae49882011-01-20 08:05:15 +0000[diff] [blame]12#include "mx35pdk.h"
Benoît Thébaudeau151d63c2012-08-20 09:54:53 +0000[diff] [blame]13#include <asm/arch/lowlevel_macro.S>
Stefano Babiceae49882011-01-20 08:05:15 +0000[diff] [blame]14
15/*
16 * return soc version
17 * 0x10: TO1
18 * 0x20: TO2
19 * 0x30: TO3
20 */
21.macro check_soc_version ret, tmp
22 ldr \tmp, =IIM_BASE_ADDR
23 ldr \ret, [\tmp, #IIM_SREV]
24 cmp \ret, #0x00
25 moveq \tmp, #ROMPATCH_REV
26 ldreq \ret, [\tmp]
27 moveq \ret, \ret, lsl #4
28 addne \ret, \ret, #0x10
29.endm
30
Stefano Babiceae49882011-01-20 08:05:15 +0000[diff] [blame]31/* CPLD on CS5 setup */
32.macro init_debug_board
33 ldr r0, =DBG_BASE_ADDR
34 ldr r1, =DBG_CSCR_U_CONFIG
35 str r1, [r0, #0x00]
36 ldr r1, =DBG_CSCR_L_CONFIG
37 str r1, [r0, #0x04]
38 ldr r1, =DBG_CSCR_A_CONFIG
39 str r1, [r0, #0x08]
40.endm
41
42/* clock setup */
43.macro init_clock
44 ldr r0, =CCM_BASE_ADDR
45
46 /* default CLKO to 1/32 of the ARM core*/
47 ldr r1, [r0, #CLKCTL_COSR]
48 bic r1, r1, #0x00000FF00
49 bic r1, r1, #0x0000000FF
50 mov r2, #0x00006C00
51 add r2, r2, #0x67
52 orr r1, r1, r2
53 str r1, [r0, #CLKCTL_COSR]
54
55 ldr r2, =CCM_CCMR_CONFIG
56 str r2, [r0, #CLKCTL_CCMR]
57
58 check_soc_version r1, r2
59 cmp r1, #CHIP_REV_2_0
60 ldrhs r3, =CCM_MPLL_532_HZ
61 bhs 1f
62 ldr r2, [r0, #CLKCTL_PDR0]
63 tst r2, #CLKMODE_CONSUMER
64 ldrne r3, =CCM_MPLL_532_HZ /* consumer path*/
65 ldreq r3, =CCM_MPLL_399_HZ /* auto path*/
661:
67 str r3, [r0, #CLKCTL_MPCTL]
68
69 ldr r1, =CCM_PPLL_300_HZ
70 str r1, [r0, #CLKCTL_PPCTL]
71
72 ldr r1, =CCM_PDR0_CONFIG
73 bic r1, r1, #0x800000
74 str r1, [r0, #CLKCTL_PDR0]
75
76 ldr r1, [r0, #CLKCTL_CGR0]
77 orr r1, r1, #0x0C300000
78 str r1, [r0, #CLKCTL_CGR0]
79
80 ldr r1, [r0, #CLKCTL_CGR1]
81 orr r1, r1, #0x00000C00
82 orr r1, r1, #0x00000003
83 str r1, [r0, #CLKCTL_CGR1]
Benoît Thébaudeau961a7622012-11-13 09:58:25 +0000[diff] [blame]84
85 ldr r1, [r0, #CLKCTL_CGR2]
86 orr r1, r1, #0x00C00000
87 str r1, [r0, #CLKCTL_CGR2]
Stefano Babiceae49882011-01-20 08:05:15 +0000[diff] [blame]88.endm
89
90.macro setup_sdram
91 ldr r0, =ESDCTL_BASE_ADDR
92 mov r3, #0x2000
93 str r3, [r0, #0x0]
94 str r3, [r0, #0x8]
95
96 /*ip(r12) has used to save lr register in upper calling*/
97 mov fp, lr
98
99 mov r5, #0x00
100 mov r2, #0x00
101 mov r1, #CSD0_BASE_ADDR
102 bl setup_sdram_bank
Stefano Babic6b5acfc2011-08-02 14:42:36 +0200[diff] [blame]103
104 mov r5, #0x00
105 mov r2, #0x00
106 mov r1, #CSD1_BASE_ADDR
107 bl setup_sdram_bank
Stefano Babiceae49882011-01-20 08:05:15 +0000[diff] [blame]108
109 mov lr, fp
110
1111:
112 ldr r3, =ESDCTL_DELAY_LINE5
113 str r3, [r0, #0x30]
114.endm
115
116.globl lowlevel_init
117lowlevel_init:
118 mov r10, lr
119
Benoît Thébaudeau151d63c2012-08-20 09:54:53 +0000[diff] [blame]120 core_init
Stefano Babiceae49882011-01-20 08:05:15 +0000[diff] [blame]121
122 init_aips
123
124 init_max
125
126 init_m3if
127
128 init_clock
129 init_debug_board
130
131 cmp pc, #PHYS_SDRAM_1
132 blo init_sdram_start
133 cmp pc, #(PHYS_SDRAM_1 + PHYS_SDRAM_1_SIZE)
134 blo skip_sdram_setup
135
136init_sdram_start:
137 /*init_sdram*/
138 setup_sdram
139
140skip_sdram_setup:
141 mov lr, r10
142 mov pc, lr
143
144
145/*
146 * r0: ESDCTL control base, r1: sdram slot base
147 * r2: DDR type(0:DDR2, 1:MDDR) r3, r4:working base
148 */
149setup_sdram_bank:
150 mov r3, #0xE
151 tst r2, #0x1
152 orreq r3, r3, #0x300 /*DDR2*/
153 str r3, [r0, #0x10]
154 bic r3, r3, #0x00A
155 str r3, [r0, #0x10]
156 beq 2f
157
158 mov r3, #0x20000
1591: subs r3, r3, #1
160 bne 1b
161
1622: tst r2, #0x1
163 ldreq r3, =ESDCTL_DDR2_CONFIG
164 ldrne r3, =ESDCTL_MDDR_CONFIG
165 cmp r1, #CSD1_BASE_ADDR
166 strlo r3, [r0, #0x4]
167 strhs r3, [r0, #0xC]
168
169 ldr r3, =ESDCTL_0x92220000
170 strlo r3, [r0, #0x0]
171 strhs r3, [r0, #0x8]
172 mov r3, #0xDA
173 ldr r4, =ESDCTL_PRECHARGE
174 strb r3, [r1, r4]
175
176 tst r2, #0x1
177 bne skip_set_mode
178
179 cmp r1, #CSD1_BASE_ADDR
180 ldr r3, =ESDCTL_0xB2220000
181 strlo r3, [r0, #0x0]
182 strhs r3, [r0, #0x8]
183 mov r3, #0xDA
184 ldr r4, =ESDCTL_DDR2_EMR2
185 strb r3, [r1, r4]
186 ldr r4, =ESDCTL_DDR2_EMR3
187 strb r3, [r1, r4]
188 ldr r4, =ESDCTL_DDR2_EN_DLL
189 strb r3, [r1, r4]
190 ldr r4, =ESDCTL_DDR2_RESET_DLL
191 strb r3, [r1, r4]
192
193 ldr r3, =ESDCTL_0x92220000
194 strlo r3, [r0, #0x0]
195 strhs r3, [r0, #0x8]
196 mov r3, #0xDA
197 ldr r4, =ESDCTL_PRECHARGE
198 strb r3, [r1, r4]
199
200skip_set_mode:
201 cmp r1, #CSD1_BASE_ADDR
202 ldr r3, =ESDCTL_0xA2220000
203 strlo r3, [r0, #0x0]
204 strhs r3, [r0, #0x8]
205 mov r3, #0xDA
206 strb r3, [r1]
207 strb r3, [r1]
208
209 ldr r3, =ESDCTL_0xB2220000
210 strlo r3, [r0, #0x0]
211 strhs r3, [r0, #0x8]
212 tst r2, #0x1
213 ldreq r4, =ESDCTL_DDR2_MR
214 ldrne r4, =ESDCTL_MDDR_MR
215 mov r3, #0xDA
216 strb r3, [r1, r4]
217 ldreq r4, =ESDCTL_DDR2_OCD_DEFAULT
218 streqb r3, [r1, r4]
219 ldreq r4, =ESDCTL_DDR2_EN_DLL
220 ldrne r4, =ESDCTL_MDDR_EMR
221 strb r3, [r1, r4]
222
223 cmp r1, #CSD1_BASE_ADDR
224 ldr r3, =ESDCTL_0x82228080
225 strlo r3, [r0, #0x0]
226 strhs r3, [r0, #0x8]
227
228 tst r2, #0x1
229 moveq r4, #0x20000
230 movne r4, #0x200
2311: subs r4, r4, #1
232 bne 1b
233
234 str r3, [r1, #0x100]
235 ldr r4, [r1, #0x100]
236 cmp r3, r4
237 movne r3, #1
238 moveq r3, #0
239
240 mov pc, lr