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wdenka56bd922004-06-06 23:13:55 +00001/*
2 * Board specific setup info
3 *
4 * (C) Copyright 2003-2004
5 *
6 * Texas Instruments, <www.ti.com>
7 * Kshitij Gupta <Kshitij@ti.com>
8 *
9 * Modified for OMAP 1610 H2 board by Nishant Kamat, Jan 2004
10 *
11 * Modified for OMAP730 P2 Board by Dave Peverley, MPC-Data Limited
12 * (http://www.mpc-data.co.uk)
13 *
14 * TODO : Tidy up and change to use system register defines
15 * from omap730.h where possible.
16 *
17 * See file CREDITS for list of people who contributed to this
18 * project.
19 *
20 * This program is free software; you can redistribute it and/or
21 * modify it under the terms of the GNU General Public License as
22 * published by the Free Software Foundation; either version 2 of
23 * the License, or (at your option) any later version.
24 *
25 * This program is distributed in the hope that it will be useful,
26 * but WITHOUT ANY WARRANTY; without even the implied warranty of
27 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
28 * GNU General Public License for more details.
29 *
30 * You should have received a copy of the GNU General Public License
31 * along with this program; if not, write to the Free Software
32 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
33 * MA 02111-1307 USA
34 */
35
36#include <config.h>
37#include <version.h>
38
39#if defined(CONFIG_OMAP730)
40#include <./configs/omap730.h>
41#endif
42
43_TEXT_BASE:
44 .word TEXT_BASE /* sdram load addr from config.mk */
45
Wolfgang Denk87cb6862005-10-06 17:08:18 +020046.globl lowlevel_init
47lowlevel_init:
wdenka56bd922004-06-06 23:13:55 +000048 /* Save callers address in r11 - r11 must never be modified */
49 mov r11, lr
50
51 /*------------------------------------------------------*
52 *mask all IRQs by setting all bits in the INTMR default*
53 *------------------------------------------------------*/
54 mov r1, #0xffffffff
55 ldr r0, =REG_IHL1_MIR
56 str r1, [r0]
57 ldr r0, =REG_IHL2_MIR
58 str r1, [r0]
59
60 /*------------------------------------------------------*
61 * Set up ARM CLM registers (IDLECT1) *
62 *------------------------------------------------------*/
63 ldr r0, REG_ARM_IDLECT1
64 ldr r1, VAL_ARM_IDLECT1
65 str r1, [r0]
66
67 /*------------------------------------------------------*
68 * Set up ARM CLM registers (IDLECT2) *
69 *------------------------------------------------------*/
70 ldr r0, REG_ARM_IDLECT2
71 ldr r1, VAL_ARM_IDLECT2
72 str r1, [r0]
73
74 /*------------------------------------------------------*
75 * Set up ARM CLM registers (IDLECT3) *
76 *------------------------------------------------------*/
77 ldr r0, REG_ARM_IDLECT3
78 ldr r1, VAL_ARM_IDLECT3
79 str r1, [r0]
80
81
82 mov r1, #0x01 /* PER_EN bit */
83 ldr r0, REG_ARM_RSTCT2
84 strh r1, [r0] /* CLKM; Peripheral reset. */
85
86 /* Set CLKM to Sync-Scalable */
87 /* I supposedly need to enable the dsp clock before switching */
88 mov r1, #0x1000
89 ldr r0, REG_ARM_SYSST
90 strh r1, [r0]
91 mov r0, #0x400
921:
93 subs r0, r0, #0x1 /* wait for any bubbles to finish */
94 bne 1b
95 ldr r1, VAL_ARM_CKCTL
96 ldr r0, REG_ARM_CKCTL
97 strh r1, [r0]
98
99 /* a few nops to let settle */
100 nop
101 nop
102 nop
103 nop
104 nop
105 nop
106 nop
107 nop
108 nop
109 nop
110
111 /* setup DPLL 1 */
112 /* Ramp up the clock to 96Mhz */
113 ldr r1, VAL_DPLL1_CTL
114 ldr r0, REG_DPLL1_CTL
115 strh r1, [r0]
116 ands r1, r1, #0x10 /* Check if PLL is enabled. */
117 beq lock_end /* Do not look for lock if BYPASS selected */
1182:
119 ldrh r1, [r0]
120 ands r1, r1, #0x01 /* Check the LOCK bit.*/
121 beq 2b /* loop until bit goes hi. */
122lock_end:
123
124 /*------------------------------------------------------*
125 * Turn off the watchdog during init... *
126 *------------------------------------------------------*/
127 ldr r0, REG_WATCHDOG
128 ldr r1, WATCHDOG_VAL1
129 str r1, [r0]
130 ldr r1, WATCHDOG_VAL2
131 str r1, [r0]
132 ldr r0, REG_WSPRDOG
133 ldr r1, WSPRDOG_VAL1
134 str r1, [r0]
135 ldr r0, REG_WWPSDOG
136
137watch1Wait:
138 ldr r1, [r0]
139 tst r1, #0x10
140 bne watch1Wait
141
142 ldr r0, REG_WSPRDOG
143 ldr r1, WSPRDOG_VAL2
144 str r1, [r0]
145 ldr r0, REG_WWPSDOG
146watch2Wait:
147 ldr r1, [r0]
148 tst r1, #0x10
149 bne watch2Wait
150
151 /* Set memory timings corresponding to the new clock speed */
152
153 /* Check execution location to determine current execution location
154 * and branch to appropriate initialization code.
155 */
156 /* Compare physical SDRAM base & current execution location. */
157 and r0, pc, #0xF0000000
158 /* Compare. */
159 cmp r0, #0
160 /* Skip over EMIF-fast initialization if running from SDRAM. */
161 bne skip_sdram
162
163 /*
164 * Delay for SDRAM initialization.
165 */
166 mov r3, #0x1800 /* value should be checked */
1673:
168 subs r3, r3, #0x1 /* Decrement count */
169 bne 3b
170
171 ldr r0, REG_SDRAM_CONFIG
172 ldr r1, SDRAM_CONFIG_VAL
173 str r1, [r0]
174
175 ldr r0, REG_SDRAM_MRS_LEGACY
176 ldr r1, SDRAM_MRS_VAL
177 str r1, [r0]
178
179skip_sdram:
180
181common_tc:
182 /* slow interface */
183 ldr r1, VAL_TC_EMIFS_CS0_CONFIG
184 ldr r0, REG_TC_EMIFS_CS0_CONFIG
185 str r1, [r0] /* Chip Select 0 */
186
187 ldr r1, VAL_TC_EMIFS_CS1_CONFIG
188 ldr r0, REG_TC_EMIFS_CS1_CONFIG
189 str r1, [r0] /* Chip Select 1 */
190 ldr r1, VAL_TC_EMIFS_CS2_CONFIG
191 ldr r0, REG_TC_EMIFS_CS2_CONFIG
192 str r1, [r0] /* Chip Select 2 */
193 ldr r1, VAL_TC_EMIFS_CS3_CONFIG
194 ldr r0, REG_TC_EMIFS_CS3_CONFIG
195 str r1, [r0] /* Chip Select 3 */
196
197 /* 48MHz clock request for UART1 */
198 ldr r1, PERSEUS2_CONFIG_BASE
199 ldrh r0, [r1, #CONFIG_PCC_CONF]
200 orr r0, r0, #CONF_MOD_UART1_CLK_MODE_R
201 strh r0, [r1, #CONFIG_PCC_CONF]
202
203 /* Initialize public and private rheas
204 * - set access factor 2 on both rhea / strobe
205 * - disable write buffer on strb0, enable write buffer on strb1
206 */
207
208 ldr R0, REG_RHEA_PUB_CTL
209 ldr R1, REG_RHEA_PRIV_CTL
210 ldr R2, VAL_RHEA_CTL
211 strh R2, [R0]
212 strh R2, [R1]
213 mov R3, #2 /* disable write buffer on strb0, enable write buffer on strb1 */
214 strh R3, [R0, #0x08] /* arm rhea control reg */
215 strh R3, [R1, #0x08]
216
217 /* enable IRQ and FIQ */
218
219 mrs r4, CPSR
220 bic r4, r4, #IRQ_MASK
221 bic r4, r4, #FIQ_MASK
222 msr CPSR, r4
223
224 /* set TAP CONF to TRI EMULATION */
225
226 ldr r1, [r0, #CONFIG_MODE2]
227 bic r1, r1, #0x18
228 orr r1, r1, #0x10
229 str r1, [r0, #CONFIG_MODE2]
230
231 /* set tdbgen to 1 */
232
233 ldr r0, PERSEUS2_CONFIG_BASE
234 ldr r1, [r0, #CONFIG_MODE1]
235 mov r2, #0x10000
236 orr r1, r1, r2
237 str r1, [r0, #CONFIG_MODE1]
238
239#ifdef CONFIG_P2_OMAP1610
240 /* inserting additional 2 clock cycle hold time for LAN */
241 ldr r0, REG_TC_EMIFS_CS1_ADVANCED
242 ldr r1, VAL_TC_EMIFS_CS1_ADVANCED
243 str r1, [r0]
244#endif
245 /* Start MPU Timer 1 */
246 ldr r0, REG_MPU_LOAD_TIMER
247 ldr r1, VAL_MPU_LOAD_TIMER
248 str r1, [r0]
249
250 ldr r0, REG_MPU_CNTL_TIMER
251 ldr r1, VAL_MPU_CNTL_TIMER
252 str r1, [r0]
253
254 /* back to arch calling code */
255 mov pc, r11
256
257 /* the literal pools origin */
258 .ltorg
259
260REG_TC_EMIFS_CONFIG: /* 32 bits */
261 .word 0xfffecc0c
262REG_TC_EMIFS_CS0_CONFIG: /* 32 bits */
263 .word 0xfffecc10
264REG_TC_EMIFS_CS1_CONFIG: /* 32 bits */
265 .word 0xfffecc14
266REG_TC_EMIFS_CS2_CONFIG: /* 32 bits */
267 .word 0xfffecc18
268REG_TC_EMIFS_CS3_CONFIG: /* 32 bits */
269 .word 0xfffecc1c
270
271#ifdef CONFIG_P2_OMAP730
272REG_TC_EMIFS_CS1_ADVANCED: /* 32 bits */
273 .word 0xfffecc54
274#endif
275
276/* MPU clock/reset/power mode control registers */
277REG_ARM_CKCTL: /* 16 bits */
278 .word 0xfffece00
279
280REG_ARM_IDLECT3: /* 16 bits */
281 .word 0xfffece24
282REG_ARM_IDLECT2: /* 16 bits */
283 .word 0xfffece08
284REG_ARM_IDLECT1: /* 16 bits */
285 .word 0xfffece04
286
287REG_ARM_RSTCT2: /* 16 bits */
288 .word 0xfffece14
289REG_ARM_SYSST: /* 16 bits */
290 .word 0xfffece18
291/* DPLL control registers */
292REG_DPLL1_CTL: /* 16 bits */
293 .word 0xfffecf00
294
295/* Watch Dog register */
296/* secure watchdog stop */
297REG_WSPRDOG:
298 .word 0xfffeb048
299/* watchdog write pending */
300REG_WWPSDOG:
301 .word 0xfffeb034
302
303WSPRDOG_VAL1:
304 .word 0x0000aaaa
305WSPRDOG_VAL2:
306 .word 0x00005555
307
308/* SDRAM config is: auto refresh enabled, 16 bit 4 bank,
309 counter @8192 rows, 10 ns, 8 burst */
310REG_SDRAM_CONFIG:
311 .word 0xfffecc20
312
313REG_SDRAM_MRS_LEGACY:
314 .word 0xfffecc24
315
316REG_WATCHDOG:
317 .word 0xfffec808
318
319REG_MPU_LOAD_TIMER:
320 .word 0xfffec600
321REG_MPU_CNTL_TIMER:
322 .word 0xfffec500
323
324/* Public and private rhea bridge registers definition */
325
326REG_RHEA_PUB_CTL:
327 .word 0xFFFECA00
328
329REG_RHEA_PRIV_CTL:
330 .word 0xFFFED300
331
332/* EMIFF SDRAM Configuration register
333 - self refresh disable
334 - auto refresh enabled
335 - SDRAM type 64 Mb, 16 bits bus 4 banks
336 - power down enabled
337 - SDRAM clock disabled
338 */
339SDRAM_CONFIG_VAL:
340 .word 0x0C017DF4
341
342/* Burst full page length ; cas latency = 3 */
343SDRAM_MRS_VAL:
344 .word 0x00000037
345
346VAL_ARM_CKCTL:
347 .word 0x6505
348VAL_DPLL1_CTL:
349 .word 0x3412
350
351#ifdef CONFIG_P2_OMAP730
352VAL_TC_EMIFS_CS0_CONFIG:
353 .word 0x0000FFF3
354VAL_TC_EMIFS_CS1_CONFIG:
355 .word 0x00004278
356VAL_TC_EMIFS_CS2_CONFIG:
357 .word 0x00004278
358VAL_TC_EMIFS_CS3_CONFIG:
359 .word 0x00004278
360VAL_TC_EMIFS_CS1_ADVANCED:
361 .word 0x00000022
362#endif
363
364VAL_ARM_IDLECT1:
365 .word 0x00000400
366VAL_ARM_IDLECT2:
367 .word 0x00000886
368VAL_ARM_IDLECT3:
369 .word 0x00000015
370
371WATCHDOG_VAL1:
372 .word 0x000000f5
373WATCHDOG_VAL2:
374 .word 0x000000a0
375
376VAL_MPU_LOAD_TIMER:
377 .word 0xffffffff
378VAL_MPU_CNTL_TIMER:
379 .word 0xffffffa1
380
381VAL_RHEA_CTL:
382 .word 0xFF22
383
384/* Config Register vals */
385PERSEUS2_CONFIG_BASE:
386 .word 0xFFFE1000
387
388.equ CONFIG_PCC_CONF, 0xB4
389.equ CONFIG_MODE1, 0x10
390.equ CONFIG_MODE2, 0x14
391.equ CONF_MOD_UART1_CLK_MODE_R, 0x0A
392
393/* misc values */
wdenk1eaeb582004-06-08 00:22:43 +0000394.equ IRQ_MASK, 0x80 /* IRQ mask value */
395.equ FIQ_MASK, 0x40 /* FIQ mask value */