summaryrefslogtreecommitdiff
path: root/board/ti/omap5912osk/lowlevel_init.S
blob: cad0a5acd87eab692c3b2617f3a52480b2c8241b (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
/*
 * Board specific setup info
 *
 * (C) Copyright 2003
 * Texas Instruments, <www.ti.com>
 * Kshitij Gupta <Kshitij@ti.com>
 *
 * Modified for OMAP 1610 H2 board by Nishant Kamat, Jan 2004
 *
 * Modified for OMAP 5912 OSK board by Rishi Bhattacharya, Apr 2004
 * SPDX-License-Identifier:	GPL-2.0+
 */

#include <config.h>
#include <version.h>

#if defined(CONFIG_OMAP1610)
#include <./configs/omap1510.h>
#endif


_TEXT_BASE:
	.word	CONFIG_SYS_TEXT_BASE	/* sdram load addr from config.mk */

.globl lowlevel_init
lowlevel_init:

	/*------------------------------------------------------*
	 * Ensure i-cache is enabled                            *
	 * To configure TC regs without fetching instruction    *
	 *------------------------------------------------------*/
	mrc	p15, 0, r0, c1, c0
	orr	r0, r0, #0x1000
	mcr	p15, 0, r0, c1, c0

	/*------------------------------------------------------*
	 *mask all IRQs by setting all bits in the INTMR default*
	 *------------------------------------------------------*/
	mov	r1, #0xffffffff
	ldr	r0, =REG_IHL1_MIR
	str	r1, [r0]
	ldr	r0, =REG_IHL2_MIR
	str	r1, [r0]

	/*------------------------------------------------------*
	 * Set up ARM CLM registers (IDLECT1)                   *
	 *------------------------------------------------------*/
	ldr	r0,	REG_ARM_IDLECT1
	ldr	r1,	VAL_ARM_IDLECT1
	str	r1,	[r0]

	/*------------------------------------------------------*
	 * Set up ARM CLM registers (IDLECT2)                   *
	 *------------------------------------------------------*/
	ldr	r0,	REG_ARM_IDLECT2
	ldr	r1,	VAL_ARM_IDLECT2
	str	r1,	[r0]

	/*------------------------------------------------------*
	 * Set up ARM CLM registers (IDLECT3)                   *
	 *------------------------------------------------------*/
	ldr	r0,	REG_ARM_IDLECT3
	ldr	r1,	VAL_ARM_IDLECT3
	str	r1,	[r0]

	mov	r1,	#0x01               /* PER_EN bit */
	ldr	r0,	REG_ARM_RSTCT2
	strh	r1,	[r0]            /* CLKM; Peripheral reset. */

	/* Set CLKM to Sync-Scalable */
	mov	r1,	#0x1000
	ldr	r0,	REG_ARM_SYSST

	mov	r2,	#0
1:	cmp	r2,	#1
	streqh	r1,	[r0]
	add	r2,	r2,	#1
	cmp	r2,	#0x100              /* wait for any bubbles to finish */
	bne	1b

	ldr	r1,	VAL_ARM_CKCTL
	ldr	r0,	REG_ARM_CKCTL
	strh	r1,	[r0]

	/* a few nops to let settle */
	nop
	nop
	nop
	nop
	nop
	nop
	nop
	nop
	nop
	nop

	/* setup DPLL 1 */
	/* Ramp up the clock to 96Mhz */
	ldr	r1,	VAL_DPLL1_CTL
	ldr	r0,	REG_DPLL1_CTL
	strh	r1,	[r0]
	ands	r1,	r1,	#0x10       /* Check if PLL is enabled. */
	beq	lock_end                /* Do not look for lock if BYPASS selected */
2:
	ldrh	r1,	[r0]
	ands	r1,	r1,	#0x01       /* Check the LOCK bit.*/
	beq 2b                      /* loop until bit goes hi. */
lock_end:

	/*------------------------------------------------------*
	 * Turn off the watchdog during init...                 *
	 *------------------------------------------------------*/
	ldr	r0,	REG_WATCHDOG
	ldr	r1,	WATCHDOG_VAL1
	str	r1,	[r0]
	ldr	r1,	WATCHDOG_VAL2
	str	r1,	[r0]
	ldr	r0,	REG_WSPRDOG
	ldr	r1,	WSPRDOG_VAL1
	str	r1,	[r0]
	ldr	r0,	REG_WWPSDOG

watch1Wait:
	ldr	r1,	[r0]
	tst	r1,	#0x10
	bne	watch1Wait

	ldr	r0,	REG_WSPRDOG
	ldr	r1,	WSPRDOG_VAL2
	str	r1,	[r0]
	ldr	r0,	REG_WWPSDOG
watch2Wait:
	ldr	r1,	[r0]
	tst	r1,	#0x10
	bne	watch2Wait

	/* Set memory timings corresponding to the new clock speed */
	ldr	r3, VAL_SDRAM_CONFIG_SDF0

	/* Check execution location to determine current execution location
	 * and branch to appropriate initialization code.
	 */
	mov	r0,	#0x10000000         /* Load physical SDRAM base. */
	mov	r1,	pc                  /* Get current execution location. */
	cmp	r1,	r0                  /* Compare. */
	bge	skip_sdram              /* Skip over EMIF-fast initialization if running from SDRAM. */

	/* identify the device revision, -- TMX or TMP(TMS) */
	ldr	r0, REG_DEVICE_ID
	ldr	r1, [r0]

	ldr	r0, VAL_DEVICE_ID_TMP
	mov	r1, r1, lsl #15
	mov	r1, r1, lsr #16
	cmp	r0, r1
	bne	skip_TMP_Patch

	/* Enable TMP/TMS device new features */
	mov	r0, #1
	ldr	r1, REG_TC_EMIFF_DOUBLER
	str	r0, [r1]

	/* Enable new ac parameters */
	mov	r0, #0x0b
	ldr	r1, REG_SDRAM_CONFIG2
	str	r0, [r1]

	ldr	r3, VAL_SDRAM_CONFIG_SDF1

skip_TMP_Patch:

	/*
	* Delay for SDRAM initialization.
	*/
	mov	r0,	#0x1800		/* value should be checked */
3:
	subs	r0,	r0,	#0x1	/* Decrement count */
	bne	3b

	/*
	 * Set SDRAM control values. Disable refresh before MRS command.
	 */

	/* mobile ddr operation */
	ldr	r0,	REG_SDRAM_OPERATION
	mov	r2,	#07
	str	r2,	[r0]

	/* config register */
	ldr	r0,	REG_SDRAM_CONFIG
	str	r3,	[r0]

	/* manual command register */
	ldr	r0,	REG_SDRAM_MANUAL_CMD

	/* issue set cke high */
	mov	r1,	#CMD_SDRAM_CKE_SET_HIGH
	str	r1,	[r0]

	/* issue nop */
	mov	r1,	#CMD_SDRAM_NOP
	str	r1,	[r0]

	mov	r2,	#0x0100
waitMDDR1:
	subs	r2,	r2,	 #1
	bne	waitMDDR1	/* delay loop */

	/* issue precharge */
	mov	r1,	#CMD_SDRAM_PRECHARGE
	str	r1,	[r0]

	/* issue autorefresh x 2 */
	mov	r1,	#CMD_SDRAM_AUTOREFRESH
	str	r1,	[r0]
	str	r1,	[r0]

	/* mrs register ddr mobile */
	ldr	r0,	REG_SDRAM_MRS
	mov	r1,	#0x33
	str	r1,	[r0]

	/* emrs1 low-power register */
	ldr	r0,	REG_SDRAM_EMRS1
	/* self refresh on all banks */
	mov	r1,	#0
	str	r1,	[r0]

	ldr	r0,	REG_DLL_URD_CONTROL
	ldr	r1,	DLL_URD_CONTROL_VAL
	str	r1,	[r0]

	ldr	r0,	REG_DLL_LRD_CONTROL
	ldr	r1,	DLL_LRD_CONTROL_VAL
	str	r1,	[r0]

	ldr	r0,	REG_DLL_WRT_CONTROL
	ldr	r1,	DLL_WRT_CONTROL_VAL
	str	r1,	[r0]

	/* delay loop */
	mov	r0,	#0x0100
waitMDDR2:
	subs	r0,	r0,	#1
	bne	waitMDDR2

	/*
	 * Delay for SDRAM initialization.
	 */
	mov	r0,	#0x1800
4:
	subs	r0,	r0,	#1	/* Decrement count. */
	bne	4b
	b	common_tc

skip_sdram:
	ldr	r0,	REG_SDRAM_CONFIG
	str	r3,	[r0]

common_tc:
	/* slow interface */
	ldr	r1,	VAL_TC_EMIFS_CS0_CONFIG
	ldr	r0,	REG_TC_EMIFS_CS0_CONFIG
	str	r1,	[r0] /* Chip Select 0 */

	ldr	r1,	VAL_TC_EMIFS_CS1_CONFIG
	ldr	r0,	REG_TC_EMIFS_CS1_CONFIG
	str	r1,	[r0] /* Chip Select 1 */

	ldr	r1,	VAL_TC_EMIFS_CS3_CONFIG
	ldr	r0,	REG_TC_EMIFS_CS3_CONFIG
	str	r1,	[r0] /* Chip Select 3 */

	ldr	r1,	VAL_TC_EMIFS_DWS
	ldr	r0,	REG_TC_EMIFS_DWS
	str	r1,	[r0] /* Enable EMIFS.RDY for CS1 (ether) */

#ifdef CONFIG_H2_OMAP1610
	/* inserting additional 2 clock cycle hold time for LAN */
	ldr     r0,     REG_TC_EMIFS_CS1_ADVANCED
	ldr	r1,     VAL_TC_EMIFS_CS1_ADVANCED
	str     r1,     [r0]
#endif
	/* Start MPU Timer 1 */
	ldr	r0,	REG_MPU_LOAD_TIMER
	ldr	r1,	VAL_MPU_LOAD_TIMER
	str	r1,	[r0]

	ldr	r0,	REG_MPU_CNTL_TIMER
	ldr	r1,	VAL_MPU_CNTL_TIMER
	str	r1,	[r0]

	/*
	 * Setup a temporary stack
	 */
	ldr	sp,	SRAM_STACK
	bic	sp, sp, #7 /* 8-byte alignment for ABI compliance */

	/*
	 * Save the old lr(passed in ip) and the current lr to stack
	 */
	push	{ip, lr}

	/*
	 * go setup pll, mux, memory
	 */
	bl	s_init
	pop	{ip, pc}

	/* back to arch calling code */
	mov	pc,	lr

	/* the literal pools origin */
	.ltorg

REG_DEVICE_ID:			/* 32 bits */
	.word 0xfffe2004
REG_TC_EMIFS_CONFIG:
	.word 0xfffecc0c
REG_TC_EMIFS_CS0_CONFIG:	/* 32 bits */
	.word 0xfffecc10
REG_TC_EMIFS_CS1_CONFIG:	/* 32 bits */
	.word 0xfffecc14
REG_TC_EMIFS_CS2_CONFIG:	/* 32 bits */
	.word 0xfffecc18
REG_TC_EMIFS_CS3_CONFIG:	/* 32 bits */
	.word 0xfffecc1c
REG_TC_EMIFS_DWS:		/* 32 bits */
	.word 0xfffecc40
#ifdef CONFIG_H2_OMAP1610
REG_TC_EMIFS_CS1_ADVANCED:	/* 32 bits */
	.word 0xfffecc54
#endif

/* MPU clock/reset/power mode control registers */
REG_ARM_CKCTL:			/* 16 bits */
	.word 0xfffece00
REG_ARM_IDLECT3:		/* 16 bits */
	.word 0xfffece24
REG_ARM_IDLECT2:		/* 16 bits */
	.word 0xfffece08
REG_ARM_IDLECT1:		/* 16 bits */
	.word 0xfffece04
REG_ARM_RSTCT2:			/* 16 bits */
	.word 0xfffece14
REG_ARM_SYSST:			/* 16 bits */
	.word 0xfffece18

/* DPLL control registers */
REG_DPLL1_CTL:			/* 16 bits */
	.word 0xfffecf00

/* Watch Dog register */
/* secure watchdog stop */
REG_WSPRDOG:
	.word 0xfffeb048
/* watchdog write pending */
REG_WWPSDOG:
	.word 0xfffeb034

WSPRDOG_VAL1:
	.word 0x0000aaaa
WSPRDOG_VAL2:
	.word 0x00005555

/* SDRAM config is: auto refresh enabled, 16 bit 4 bank,
 counter @8192 rows, 10 ns, 8 burst */
REG_SDRAM_CONFIG:
	.word 0xfffecc20
REG_SDRAM_CONFIG2:
	.word 0xfffecc3c
REG_TC_EMIFF_DOUBLER:		/* 32 bits */
	.word 0xfffecc60

/* Operation register */
REG_SDRAM_OPERATION:
	.word 0xfffecc80

/* Manual command register */
REG_SDRAM_MANUAL_CMD:
	.word 0xfffecc84

/* SDRAM MRS (New) config is: CAS latency is 2, burst length 8 */
REG_SDRAM_MRS:
	.word 0xfffecc70

/* SDRAM MRS (New) config is: CAS latency is 2, burst length 8 */
REG_SDRAM_EMRS1:
	.word 0xfffecc78

/* WRT DLL register */
REG_DLL_WRT_CONTROL:
	.word 0xfffecc68
DLL_WRT_CONTROL_VAL:
	.word 0x03f00002    /* Phase of 72deg, write offset +31  */

/* URD DLL register */
REG_DLL_URD_CONTROL:
	.word 0xfffeccc0
DLL_URD_CONTROL_VAL:
	.word 0x00800002    /* Phase of 72deg, read offset +31  */

/* LRD DLL register */
REG_DLL_LRD_CONTROL:
	.word 0xfffecccc
DLL_LRD_CONTROL_VAL:
	.word 0x00800002    /* read offset +31  */

REG_WATCHDOG:
	.word 0xfffec808
WATCHDOG_VAL1:
	.word 0x000000f5
WATCHDOG_VAL2:
	.word 0x000000a0

REG_MPU_LOAD_TIMER:
	.word 0xfffec504
REG_MPU_CNTL_TIMER:
	.word 0xfffec500
VAL_MPU_LOAD_TIMER:
	.word 0xffffffff
VAL_MPU_CNTL_TIMER:
	.word 0xffffffa1

/* 96 MHz Samsung Mobile DDR */
/* Original setting for TMX device */
VAL_SDRAM_CONFIG_SDF0:
    .word 0x0014e6fe

/* NEW_SYS_FREQ mode (valid only TMP/TMS devices) */
VAL_SDRAM_CONFIG_SDF1:
    .word 0x0114e6fe

VAL_ARM_CKCTL:
	.word 0x2000		/* was:	0x3000, now use CLK_REF for timer input */
VAL_DPLL1_CTL:
	.word 0x2830

#ifdef CONFIG_OSK_OMAP5912
VAL_TC_EMIFS_CS0_CONFIG:
	.word 0x002130b0
VAL_TC_EMIFS_CS1_CONFIG:
	.word 0x00001133
VAL_TC_EMIFS_CS2_CONFIG:
	.word 0x000055f0
VAL_TC_EMIFS_CS3_CONFIG:
	.word 0x88013141
VAL_TC_EMIFS_DWS:	/* Enable EMIFS.RDY for CS1 access (ether) */
	.word 0x000000c0
VAL_DEVICE_ID_TMP:	/* TMP/TMS=0xb65f, TMX=0xb58c */
	.word 0xb65f
#endif

#ifdef CONFIG_H2_OMAP1610
VAL_TC_EMIFS_CS0_CONFIG:
	.word 0x00203331
VAL_TC_EMIFS_CS1_CONFIG:
	.word 0x8180fff3
VAL_TC_EMIFS_CS2_CONFIG:
	.word 0xf800f22a
VAL_TC_EMIFS_CS3_CONFIG:
	.word 0x88013141
VAL_TC_EMIFS_CS1_ADVANCED:
	.word 0x00000022
#endif

VAL_ARM_IDLECT1:
	.word 0x00000400
VAL_ARM_IDLECT2:
	.word 0x00000886
VAL_ARM_IDLECT3:
	.word 0x00000015

SRAM_STACK:
	.word CONFIG_SYS_INIT_SP_ADDR

/* command values */
.equ CMD_SDRAM_NOP,             0x00000000
.equ CMD_SDRAM_PRECHARGE,       0x00000001
.equ CMD_SDRAM_AUTOREFRESH,     0x00000002
.equ CMD_SDRAM_CKE_SET_HIGH,    0x00000007