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gerrit.devboardsforandroid.linaro.org / platform / external / u-boot / 4e785c6ae90724b8e0b9610a61e6afc0a8f4379d / . / board / csb272 / init.S
blob: 5961978c8642b82c86b4aef9e2a22e4eec400c7a [file] [log] [blame]
Wolfgang Denk46263f22013-07-28 22:12:45 +0200[diff] [blame]1/*
Wolfgang Denk1b387ef2013-09-17 11:24:06 +0200[diff] [blame]2 * SPDX-License-Identifier: GPL-2.0 IBM-pibs
Wolfgang Denk46263f22013-07-28 22:12:45 +0200[diff] [blame]3 */
wdenkcd0a9de2004-02-23 20:48:38 +0000[diff] [blame]4#include <config.h>
Stefan Roeseb36df562010-09-09 19:18:00 +0200[diff] [blame]5#include <asm/ppc4xx.h>
wdenkcd0a9de2004-02-23 20:48:38 +0000[diff] [blame]6
7#define _LINUX_CONFIG_H 1 /* avoid reading Linux autoconf.h file */
8
9#include <ppc_asm.tmpl>
10#include <ppc_defs.h>
11
12#include <asm/cache.h>
13#include <asm/mmu.h>
14
15#define LI32(reg,val) \
16 addis reg,0,val@h;\
17 ori reg,reg,val@l
18
19#define WDCR_EBC(reg,val) \
20 addi r4,0,reg;\
Stefan Roesed1c3b272009-09-09 16:25:29 +0200[diff] [blame]21 mtdcr EBC0_CFGADDR,r4;\
wdenkcd0a9de2004-02-23 20:48:38 +0000[diff] [blame]22 addis r4,0,val@h;\
23 ori r4,r4,val@l;\
Stefan Roesed1c3b272009-09-09 16:25:29 +0200[diff] [blame]24 mtdcr EBC0_CFGDATA,r4
wdenkcd0a9de2004-02-23 20:48:38 +0000[diff] [blame]25
26#define WDCR_SDRAM(reg,val) \
27 addi r4,0,reg;\
Stefan Roesed1c3b272009-09-09 16:25:29 +0200[diff] [blame]28 mtdcr SDRAM0_CFGADDR,r4;\
wdenkcd0a9de2004-02-23 20:48:38 +0000[diff] [blame]29 addis r4,0,val@h;\
30 ori r4,r4,val@l;\
Stefan Roesed1c3b272009-09-09 16:25:29 +0200[diff] [blame]31 mtdcr SDRAM0_CFGDATA,r4
wdenkcd0a9de2004-02-23 20:48:38 +0000[diff] [blame]32
33/******************************************************************************
34 * Function: ext_bus_cntlr_init
35 *
36 * Description: Configures EBC Controller and a few basic chip selects.
37 *
38 * CS0 is setup to get the Boot Flash out of the addresss range
39 * so that we may setup a stack. CS7 is setup so that we can
40 * access and reset the hardware watchdog.
41 *
42 * IMPORTANT: For pass1 this code must run from
43 * cache since you can not reliably change a peripheral banks
44 * timing register (pbxap) while running code from that bank.
45 * For ex., since we are running from ROM on bank 0, we can NOT
46 * execute the code that modifies bank 0 timings from ROM, so
47 * we run it from cache.
48 *
49 * Notes: Does NOT use the stack.
50 *****************************************************************************/
51 .section ".text"
52 .align 2
53 .globl ext_bus_cntlr_init
54 .type ext_bus_cntlr_init, @function
55ext_bus_cntlr_init:
56 mflr r0
57 /********************************************************************
58 * Prefetch entire ext_bus_cntrl_init function into the icache.
59 * This is necessary because we are going to change the same CS we
60 * are executing from. Otherwise a CPU lockup may occur.
61 *******************************************************************/
62 bl ..getAddr
63..getAddr:
64 mflr r3 /* get address of ..getAddr */
65
66 /* Calculate number of cache lines for this function */
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +0200[diff] [blame]67 addi r4, 0, (((.Lfe0 - ..getAddr) / CONFIG_SYS_CACHELINE_SIZE) + 2)
wdenkcd0a9de2004-02-23 20:48:38 +0000[diff] [blame]68 mtctr r4
69..ebcloop:
70 icbt r0, r3 /* prefetch cache line for addr in r3*/
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +0200[diff] [blame]71 addi r3, r3, CONFIG_SYS_CACHELINE_SIZE /* move to next cache line */
wdenkcd0a9de2004-02-23 20:48:38 +0000[diff] [blame]72 bdnz ..ebcloop /* continue for $CTR cache lines */
73
74 /********************************************************************
75 * Delay to ensure all accesses to ROM are complete before changing
76 * bank 0 timings. 200usec should be enough.
77 * 200,000,000 (cycles/sec) X .000200 (sec) = 0x9C40 cycles.
78 *******************************************************************/
79 addis r3, 0, 0x0
80 ori r3, r3, 0xA000 /* wait 200us from reset */
81 mtctr r3
82..spinlp:
83 bdnz ..spinlp /* spin loop */
84
85 /********************************************************************
86 * SETUP CPC0_CR0
87 *******************************************************************/
88 LI32(r4, 0x007000c0)
Stefan Roesed1c3b272009-09-09 16:25:29 +0200[diff] [blame]89 mtdcr CPC0_CR0, r4
wdenkcd0a9de2004-02-23 20:48:38 +0000[diff] [blame]90
91 /********************************************************************
92 * Setup CPC0_CR1: Change PCIINT signal to PerWE
93 *******************************************************************/
Stefan Roesed1c3b272009-09-09 16:25:29 +0200[diff] [blame]94 mfdcr r4, CPC0_CR1
wdenkcd0a9de2004-02-23 20:48:38 +0000[diff] [blame]95 ori r4, r4, 0x4000
Stefan Roesed1c3b272009-09-09 16:25:29 +0200[diff] [blame]96 mtdcr CPC0_CR1, r4
wdenkcd0a9de2004-02-23 20:48:38 +0000[diff] [blame]97
98 /********************************************************************
99 * Setup External Bus Controller (EBC).
100 *******************************************************************/
Stefan Roesed1c3b272009-09-09 16:25:29 +0200[diff] [blame]101 WDCR_EBC(EBC0_CFG, 0xd84c0000)
wdenkcd0a9de2004-02-23 20:48:38 +0000[diff] [blame]102 /********************************************************************
103 * Memory Bank 0 (Intel 28F128J3 Flash) initialization
104 *******************************************************************/
Stefan Roesed1c3b272009-09-09 16:25:29 +0200[diff] [blame]105 /*WDCR_EBC(PB1AP, 0x02869200)*/
106 WDCR_EBC(PB1AP, 0x07869200)
107 WDCR_EBC(PB0CR, 0xfe0bc000)
wdenkcd0a9de2004-02-23 20:48:38 +0000[diff] [blame]108 /********************************************************************
109 * Memory Bank 1 (Holtek HT6542B PS/2) initialization
110 *******************************************************************/
Stefan Roesed1c3b272009-09-09 16:25:29 +0200[diff] [blame]111 WDCR_EBC(PB1AP, 0x1f869200)
112 WDCR_EBC(PB1CR, 0xf0818000)
wdenkcd0a9de2004-02-23 20:48:38 +0000[diff] [blame]113 /********************************************************************
114 * Memory Bank 2 (Epson S1D13506) initialization
115 *******************************************************************/
Stefan Roesed1c3b272009-09-09 16:25:29 +0200[diff] [blame]116 WDCR_EBC(PB2AP, 0x05860300)
117 WDCR_EBC(PB2CR, 0xf045a000)
wdenkcd0a9de2004-02-23 20:48:38 +0000[diff] [blame]118 /********************************************************************
119 * Memory Bank 3 (Philips SJA1000 CAN Controllers) initialization
120 *******************************************************************/
Stefan Roesed1c3b272009-09-09 16:25:29 +0200[diff] [blame]121 WDCR_EBC(PB3AP, 0x0387d200)
122 WDCR_EBC(PB3CR, 0xf021c000)
wdenkcd0a9de2004-02-23 20:48:38 +0000[diff] [blame]123 /********************************************************************
124 * Memory Bank 4-7 (Unused) initialization
125 *******************************************************************/
Stefan Roesed1c3b272009-09-09 16:25:29 +0200[diff] [blame]126 WDCR_EBC(PB4AP, 0)
127 WDCR_EBC(PB4CR, 0)
128 WDCR_EBC(PB5AP, 0)
129 WDCR_EBC(PB5CR, 0)
130 WDCR_EBC(PB6AP, 0)
131 WDCR_EBC(PB6CR, 0)
132 WDCR_EBC(PB7AP, 0)
133 WDCR_EBC(PB7CR, 0)
wdenkcd0a9de2004-02-23 20:48:38 +0000[diff] [blame]134
135 /* We are all done */
136 mtlr r0 /* Restore link register */
137 blr /* Return to calling function */
138.Lfe0: .size ext_bus_cntlr_init,.Lfe0-ext_bus_cntlr_init
139/* end ext_bus_cntlr_init() */
140
141/******************************************************************************
142 * Function: sdram_init
143 *
144 * Description: Configures SDRAM memory banks.
145 *
146 * Notes: Does NOT use the stack.
147 *****************************************************************************/
148 .section ".text"
149 .align 2
150 .globl sdram_init
151 .type sdram_init, @function
152sdram_init:
153
154 /*
155 * Disable memory controller to allow
156 * values to be changed.
157 */
Stefan Roese95b602b2009-09-24 13:59:57 +0200[diff] [blame]158 WDCR_SDRAM(SDRAM0_CFG, 0x00000000)
wdenkcd0a9de2004-02-23 20:48:38 +0000[diff] [blame]159
160 /*
161 * Configure Memory Banks
162 */
Stefan Roese95b602b2009-09-24 13:59:57 +0200[diff] [blame]163 WDCR_SDRAM(SDRAM0_B0CR, 0x00084001)
164 WDCR_SDRAM(SDRAM0_B1CR, 0x00000000)
165 WDCR_SDRAM(SDRAM0_B2CR, 0x00000000)
166 WDCR_SDRAM(SDRAM0_B3CR, 0x00000000)
wdenkcd0a9de2004-02-23 20:48:38 +0000[diff] [blame]167
168 /*
169 * Set up SDTR1 (SDRAM Timing Register)
170 */
Stefan Roese95b602b2009-09-24 13:59:57 +0200[diff] [blame]171 WDCR_SDRAM(SDRAM0_TR, 0x00854009)
wdenkcd0a9de2004-02-23 20:48:38 +0000[diff] [blame]172
173 /*
174 * Set RTR (Refresh Timing Register)
175 */
Stefan Roese95b602b2009-09-24 13:59:57 +0200[diff] [blame]176 WDCR_SDRAM(SDRAM0_RTR, 0x10000000)
177 /* WDCR_SDRAM(SDRAM0_RTR, 0x05f00000) */
wdenkcd0a9de2004-02-23 20:48:38 +0000[diff] [blame]178
179 /********************************************************************
180 * Delay to ensure 200usec have elapsed since reset. Assume worst
181 * case that the core is running 200Mhz:
182 * 200,000,000 (cycles/sec) X .000200 (sec) = 0x9C40 cycles
183 *******************************************************************/
184 addis r3, 0, 0x0000
185 ori r3, r3, 0xA000 /* Wait >200us from reset */
186 mtctr r3
187..spinlp2:
188 bdnz ..spinlp2 /* spin loop */
189
190 /********************************************************************
191 * Set memory controller options reg, MCOPT1.
192 *******************************************************************/
Stefan Roese95b602b2009-09-24 13:59:57 +0200[diff] [blame]193 WDCR_SDRAM(SDRAM0_CFG,0x80800000)
wdenkcd0a9de2004-02-23 20:48:38 +0000[diff] [blame]194
195..sdri_done:
196 blr /* Return to calling function */
197.Lfe1: .size sdram_init,.Lfe1-sdram_init
198/* end sdram_init() */