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wdenkc542fb22002-11-03 00:47:09 +00001/*
2 * Most of this taken from Redboot hal_platform_setup.h with cleanup
3 *
4 * See file CREDITS for list of people who contributed to this
5 * project.
6 *
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License as
9 * published by the Free Software Foundation; either version 2 of
10 * the License, or (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
20 * MA 02111-1307 USA
21 */
22
23#include <config.h>
24#include <version.h>
25#include <asm/arch/pxa-regs.h>
26
27DRAM_SIZE: .long CFG_DRAM_SIZE
28
29/* wait for coprocessor write complete */
30 .macro CPWAIT reg
31 mrc p15,0,\reg,c2,c0,0
32 mov \reg,\reg
33 sub pc,pc,#4
34 .endm
35
36 .macro SET_LED val
37 ldr r6, =CRADLE_LED_CLR_REG
38 ldr r7, =0
39 str r7, [r6]
40 ldr r6, =CRADLE_LED_SET_REG
41 ldr r7, =\val
42 str r7, [r6]
43 .endm
44
45
wdenk400558b2005-04-02 23:52:25 +000046.globl lowlevel_init
47lowlevel_init:
wdenkc542fb22002-11-03 00:47:09 +000048
49 mov r10, lr
50
51 /* Set up GPIO pins first */
52
53 ldr r0, =GPSR0
54 ldr r1, =CFG_GPSR0_VAL
55 str r1, [r0]
56
57 ldr r0, =GPSR1
58 ldr r1, =CFG_GPSR1_VAL
59 str r1, [r0]
60
61 ldr r0, =GPSR2
62 ldr r1, =CFG_GPSR2_VAL
63 str r1, [r0]
64
65 ldr r0, =GPCR0
66 ldr r1, =CFG_GPCR0_VAL
67 str r1, [r0]
68
69 ldr r0, =GPCR1
70 ldr r1, =CFG_GPCR1_VAL
71 str r1, [r0]
72
73 ldr r0, =GPCR2
74 ldr r1, =CFG_GPCR2_VAL
75 str r1, [r0]
76
77 ldr r0, =GRER0
78 ldr r1, =CFG_GRER0_VAL
79 str r1, [r0]
80
81 ldr r0, =GRER1
82 ldr r1, =CFG_GRER1_VAL
83 str r1, [r0]
84
85 ldr r0, =GRER2
86 ldr r1, =CFG_GRER2_VAL
87 str r1, [r0]
88
89 ldr r0, =GFER0
90 ldr r1, =CFG_GFER0_VAL
91 str r1, [r0]
92
93 ldr r0, =GFER1
94 ldr r1, =CFG_GFER1_VAL
95 str r1, [r0]
96
97 ldr r0, =GFER2
98 ldr r1, =CFG_GFER2_VAL
99 str r1, [r0]
100
101 ldr r0, =GPDR0
102 ldr r1, =CFG_GPDR0_VAL
103 str r1, [r0]
104
105 ldr r0, =GPDR1
106 ldr r1, =CFG_GPDR1_VAL
107 str r1, [r0]
108
109 ldr r0, =GPDR2
110 ldr r1, =CFG_GPDR2_VAL
111 str r1, [r0]
112
113 ldr r0, =GAFR0_L
114 ldr r1, =CFG_GAFR0_L_VAL
115 str r1, [r0]
116
117 ldr r0, =GAFR0_U
118 ldr r1, =CFG_GAFR0_U_VAL
119 str r1, [r0]
120
121 ldr r0, =GAFR1_L
122 ldr r1, =CFG_GAFR1_L_VAL
123 str r1, [r0]
124
125 ldr r0, =GAFR1_U
126 ldr r1, =CFG_GAFR1_U_VAL
127 str r1, [r0]
128
129 ldr r0, =GAFR2_L
130 ldr r1, =CFG_GAFR2_L_VAL
131 str r1, [r0]
132
133 ldr r0, =GAFR2_U
134 ldr r1, =CFG_GAFR2_U_VAL
135 str r1, [r0]
136
137 /* enable GPIO pins */
138 ldr r0, =PSSR
139 ldr r1, =CFG_PSSR_VAL
140 str r1, [r0]
141
142 SET_LED 1
143
144 ldr r3, =MSC1 /* low - bank 2 Lubbock Registers / SRAM */
145 ldr r2, =CFG_MSC1_VAL /* high - bank 3 Ethernet Controller */
146 str r2, [r3] /* need to set MSC1 before trying to write to the HEX LEDs */
147 ldr r2, [r3] /* need to read it back to make sure the value latches (see MSC section of manual) */
148
149
150/*********************************************************************
151 Initlialize Memory Controller
152
153 See PXA250 Operating System Developer's Guide
154
155 pause for 200 uSecs- allow internal clocks to settle
156 *Note: only need this if hard reset... doing it anyway for now
157*/
158
159 @ Step 1
160 @ ---- Wait 200 usec
161 ldr r3, =OSCR @ reset the OS Timer Count to zero
162 mov r2, #0
163 str r2, [r3]
164 ldr r4, =0x300 @ really 0x2E1 is about 200usec, so 0x300 should be plenty
1651:
166 ldr r2, [r3]
167 cmp r4, r2
168 bgt 1b
169
170 SET_LED 2
171
172mem_init:
wdenk8bde7f72003-06-27 21:31:46 +0000173 @ get memory controller base address
174 ldr r1, =MEMC_BASE
wdenkc542fb22002-11-03 00:47:09 +0000175
176
177@****************************************************************************
178@ Step 2
179@
180
181 @ Step 2a
182 @ write msc0, read back to ensure data latches
183 @
184 ldr r2, =CFG_MSC0_VAL
185 str r2, [r1, #MSC0_OFFSET]
186 ldr r2, [r1, #MSC0_OFFSET]
187
188 @ write msc1
189 ldr r2, =CFG_MSC1_VAL
190 str r2, [r1, #MSC1_OFFSET]
191 ldr r2, [r1, #MSC1_OFFSET]
192
193 @ write msc2
194 ldr r2, =CFG_MSC2_VAL
195 str r2, [r1, #MSC2_OFFSET]
196 ldr r2, [r1, #MSC2_OFFSET]
197
198 @ Step 2b
199 @ write mecr
200 ldr r2, =CFG_MECR_VAL
201 str r2, [r1, #MECR_OFFSET]
202
203 @ write mcmem0
204 ldr r2, =CFG_MCMEM0_VAL
205 str r2, [r1, #MCMEM0_OFFSET]
206
207 @ write mcmem1
208 ldr r2, =CFG_MCMEM1_VAL
209 str r2, [r1, #MCMEM1_OFFSET]
210
211 @ write mcatt0
212 ldr r2, =CFG_MCATT0_VAL
213 str r2, [r1, #MCATT0_OFFSET]
214
215 @ write mcatt1
216 ldr r2, =CFG_MCATT1_VAL
217 str r2, [r1, #MCATT1_OFFSET]
218
219 @ write mcio0
220 ldr r2, =CFG_MCIO0_VAL
221 str r2, [r1, #MCIO0_OFFSET]
222
223 @ write mcio1
224 ldr r2, =CFG_MCIO1_VAL
225 str r2, [r1, #MCIO1_OFFSET]
226
227 /*SET_LED 3 */
228
229 @ Step 2c
230 @ fly-by-dma is defeatured on this part
231 @ write flycnfg
232 @ldr r2, =CFG_FLYCNFG_VAL
233 @str r2, [r1, #FLYCNFG_OFFSET]
234
235/* FIXME Does this sequence really make sense */
236#ifdef REDBOOT_WAY
237 @ Step 2d
238 @ get the mdrefr settings
239 ldr r3, =CFG_MDREFR_VAL
240
241 @ extract DRI field (we need a valid DRI field)
242 @
243 ldr r2, =0xFFF
244
245 @ valid DRI field in r3
246 @
247 and r3, r3, r2
248
249 @ get the reset state of MDREFR
250 @
251 ldr r4, [r1, #MDREFR_OFFSET]
252
253 @ clear the DRI field
254 @
255 bic r4, r4, r2
256
257 @ insert the valid DRI field loaded above
258 @
259 orr r4, r4, r3
260
261 @ write back mdrefr
262 @
263 str r4, [r1, #MDREFR_OFFSET]
264
265 @ *Note: preserve the mdrefr value in r4 *
266
267 /*SET_LED 4 */
268
269@****************************************************************************
270@ Step 3
271@
272@ NO SRAM
273
274 mov pc, r10
275
276
277@****************************************************************************
278@ Step 4
279@
280
281 @ Assumes previous mdrefr value in r4, if not then read current mdrefr
282
283 @ clear the free-running clock bits
284 @ (clear K0Free, K1Free, K2Free
285 @
286 bic r4, r4, #(0x00800000 | 0x01000000 | 0x02000000)
287
288 @ set K0RUN for CPLD clock
289 @
290 orr r4, r4, #0x00002000
291
292 @ set K1RUN if bank 0 installed
293 @
294 orr r4, r4, #0x00010000
295
296 @ write back mdrefr
297 @
298 str r4, [r1, #MDREFR_OFFSET]
299 ldr r4, [r1, #MDREFR_OFFSET]
300
301 @ deassert SLFRSH
302 @
303 bic r4, r4, #0x00400000
304
305 @ write back mdrefr
306 @
307 str r4, [r1, #MDREFR_OFFSET]
308
309 @ assert E1PIN
310 @
311 orr r4, r4, #0x00008000
312
313 @ write back mdrefr
314 @
315 str r4, [r1, #MDREFR_OFFSET]
316 ldr r4, [r1, #MDREFR_OFFSET]
317 nop
318 nop
319#else
320 @ Step 2d
321 @ get the mdrefr settings
322 ldr r3, =CFG_MDREFR_VAL
323
324 @ write back mdrefr
325 @
326 str r4, [r1, #MDREFR_OFFSET]
327
328 @ Step 4
329
330 @ set K0RUN for CPLD clock
331 @
332 orr r4, r4, #0x00002000
333
334 @ set K1RUN for bank 0
335 @
336 orr r4, r4, #0x00010000
337
338 @ write back mdrefr
339 @
340 str r4, [r1, #MDREFR_OFFSET]
341 ldr r4, [r1, #MDREFR_OFFSET]
342
343 @ deassert SLFRSH
344 @
345 bic r4, r4, #0x00400000
346
347 @ write back mdrefr
348 @
349 str r4, [r1, #MDREFR_OFFSET]
350
351 @ assert E1PIN
352 @
353 orr r4, r4, #0x00008000
354
355 @ write back mdrefr
356 @
357 str r4, [r1, #MDREFR_OFFSET]
358 ldr r4, [r1, #MDREFR_OFFSET]
359 nop
360 nop
361#endif
362
363 @ Step 4d
364 @ fetch platform value of mdcnfg
365 @
366 ldr r2, =CFG_MDCNFG_VAL
367
368 @ disable all sdram banks
369 @
370 bic r2, r2, #(MDCNFG_DE0 | MDCNFG_DE1)
371 bic r2, r2, #(MDCNFG_DE2 | MDCNFG_DE3)
372
373 @ program banks 0/1 for bus width
374 @
375 bic r2, r2, #MDCNFG_DWID0 @0=32-bit
376
377 @ write initial value of mdcnfg, w/o enabling sdram banks
378 @
379 str r2, [r1, #MDCNFG_OFFSET]
380
381 @ Step 4e
382 @ pause for 200 uSecs
383 @
384 ldr r3, =OSCR @ reset the OS Timer Count to zero
385 mov r2, #0
386 str r2, [r3]
387 ldr r4, =0x300 @ really 0x2E1 is about 200usec, so 0x300 should be plenty
3881:
389 ldr r2, [r3]
390 cmp r4, r2
391 bgt 1b
392
393 /*SET_LED 5 */
394
395 /* Why is this here??? */
396 mov r0, #0x78 @turn everything off
397 mcr p15, 0, r0, c1, c0, 0 @(caches off, MMU off, etc.)
398
399 @ Step 4f
400 @ Access memory *not yet enabled* for CBR refresh cycles (8)
401 @ - CBR is generated for all banks
402
403 ldr r2, =CFG_DRAM_BASE
404 str r2, [r2]
405 str r2, [r2]
406 str r2, [r2]
407 str r2, [r2]
408 str r2, [r2]
409 str r2, [r2]
410 str r2, [r2]
411 str r2, [r2]
412
413 @ Step 4g
414 @get memory controller base address
415 @
416 ldr r1, =MEMC_BASE
417
418 @fetch current mdcnfg value
419 @
420 ldr r3, [r1, #MDCNFG_OFFSET]
421
422 @enable sdram bank 0 if installed (must do for any populated bank)
423 @
424 orr r3, r3, #MDCNFG_DE0
425
426 @write back mdcnfg, enabling the sdram bank(s)
427 @
428 str r3, [r1, #MDCNFG_OFFSET]
429
430 @ Step 4h
431 @ write mdmrs
432 @
433 ldr r2, =CFG_MDMRS_VAL
434 str r2, [r1, #MDMRS_OFFSET]
435
436 @ Done Memory Init
437
438 /*SET_LED 6 */
439
440 @********************************************************************
441 @ Disable (mask) all interrupts at the interrupt controller
442 @
443
444 @ clear the interrupt level register (use IRQ, not FIQ)
445 @
446 mov r1, #0
447 ldr r2, =ICLR
448 str r1, [r2]
449
450 @ Set interrupt mask register
451 @
452 ldr r1, =CFG_ICMR_VAL
453 ldr r2, =ICMR
454 str r1, [r2]
455
456 @ ********************************************************************
457 @ Disable the peripheral clocks, and set the core clock
458 @
459
460 @ Turn Off ALL on-chip peripheral clocks for re-configuration
461 @
462 ldr r1, =CKEN
463 mov r2, #0
464 str r2, [r1]
465
466 @ set core clocks
467 @
468 ldr r2, =CFG_CCCR_VAL
469 ldr r1, =CCCR
470 str r2, [r1]
471
472#ifdef ENABLE32KHZ
473 @ enable the 32Khz oscillator for RTC and PowerManager
474 @
475 ldr r1, =OSCC
476 mov r2, #OSCC_OON
477 str r2, [r1]
478
479 @ NOTE: spin here until OSCC.OOK get set,
480 @ meaning the PLL has settled.
481 @
48260:
483 ldr r2, [r1]
484 ands r2, r2, #1
485 beq 60b
486#endif
487
488 @ Turn on needed clocks
489 @
490 ldr r1, =CKEN
491 ldr r2, =CFG_CKEN_VAL
492 str r2, [r1]
493
494 /*SET_LED 7 */
495
496/* Is this needed???? */
497#define NODEBUG
498#ifdef NODEBUG
499 /*Disable software and data breakpoints */
500 mov r0,#0
501 mcr p15,0,r0,c14,c8,0 /* ibcr0 */
502 mcr p15,0,r0,c14,c9,0 /* ibcr1 */
503 mcr p15,0,r0,c14,c4,0 /* dbcon */
504
505 /*Enable all debug functionality */
506 mov r0,#0x80000000
507 mcr p14,0,r0,c10,c0,0 /* dcsr */
508
509#endif
510
511 /*SET_LED 8 */
512
513 mov pc, r10
514
wdenk400558b2005-04-02 23:52:25 +0000515@ End lowlevel_init