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lowlevel_init.S @ 55

Last change on this file since 55 was 55, checked in by Tim Harvey, 22 months ago

rincon: added latest u-boot source

restored form server backup

Signed-off-by: Tim Harvey <tharvey@…>

File size: 10.8 KB

Line
1	/*
2	* Board specific setup info
3	*
4	* (C) Copyright 2003
5	* Texas Instruments, <www.ti.com>
6	*
7	* -- Some bits of code used from rrload's head_OMAP1510.s --
8	* Copyright (C) 2002 RidgeRun, Inc.
9	*
10	* See file CREDITS for list of people who contributed to this
11	* project.
12	*
13	* This program is free software; you can redistribute it and/or
14	* modify it under the terms of the GNU General Public License as
15	* published by the Free Software Foundation; either version 2 of
16	* the License, or (at your option) any later version.
17	*
18	* This program is distributed in the hope that it will be useful,
19	* but WITHOUT ANY WARRANTY; without even the implied warranty of
20	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21	* GNU General Public License for more details.
22	*
23	* You should have received a copy of the GNU General Public License
24	* along with this program; if not, write to the Free Software
25	* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
26	* MA 02111-1307 USA
27	*/
28
29	#include <config.h>
30	#include <version.h>
31
32	#if defined(CONFIG_OMAP1510)
33	#include <./configs/omap1510.h>
34	#endif
35
36	#define OMAP1510_CLKS ((1<<EN_XORPCK)\|(1<<EN_PERCK)\|(1<<EN_TIMCK)\|(1<<EN_GPIOCK))
37
38
39	_TEXT_BASE:
40	.word TEXT_BASE /* sdram load addr from config.mk */
41
42	.globl lowlevel_init
43	lowlevel_init:
44
45	/*
46	* Configure 1510 pins functions to match our board.
47	*/
48	ldr r0, REG_PULL_DWN_CTRL_0
49	ldr r1, VAL_PULL_DWN_CTRL_0
50	str r1, [r0]
51	ldr r0, REG_PULL_DWN_CTRL_1
52	ldr r1, VAL_PULL_DWN_CTRL_1
53	str r1, [r0]
54	ldr r0, REG_PULL_DWN_CTRL_2
55	ldr r1, VAL_PULL_DWN_CTRL_2
56	str r1, [r0]
57	ldr r0, REG_PULL_DWN_CTRL_3
58	ldr r1, VAL_PULL_DWN_CTRL_3
59	str r1, [r0]
60	ldr r0, REG_FUNC_MUX_CTRL_4
61	ldr r1, VAL_FUNC_MUX_CTRL_4
62	str r1, [r0]
63	ldr r0, REG_FUNC_MUX_CTRL_5
64	ldr r1, VAL_FUNC_MUX_CTRL_5
65	str r1, [r0]
66	ldr r0, REG_FUNC_MUX_CTRL_6
67	ldr r1, VAL_FUNC_MUX_CTRL_6
68	str r1, [r0]
69	ldr r0, REG_FUNC_MUX_CTRL_7
70	ldr r1, VAL_FUNC_MUX_CTRL_7
71	str r1, [r0]
72	ldr r0, REG_FUNC_MUX_CTRL_8
73	ldr r1, VAL_FUNC_MUX_CTRL_8
74	str r1, [r0]
75	ldr r0, REG_FUNC_MUX_CTRL_9
76	ldr r1, VAL_FUNC_MUX_CTRL_9
77	str r1, [r0]
78	ldr r0, REG_FUNC_MUX_CTRL_A
79	ldr r1, VAL_FUNC_MUX_CTRL_A
80	str r1, [r0]
81	ldr r0, REG_FUNC_MUX_CTRL_B
82	ldr r1, VAL_FUNC_MUX_CTRL_B
83	str r1, [r0]
84	ldr r0, REG_FUNC_MUX_CTRL_C
85	ldr r1, VAL_FUNC_MUX_CTRL_C
86	str r1, [r0]
87	ldr r0, REG_FUNC_MUX_CTRL_D
88	ldr r1, VAL_FUNC_MUX_CTRL_D
89	str r1, [r0]
90	ldr r0, REG_VOLTAGE_CTRL_0
91	ldr r1, VAL_VOLTAGE_CTRL_0
92	str r1, [r0]
93	ldr r0, REG_TEST_DBG_CTRL_0
94	ldr r1, VAL_TEST_DBG_CTRL_0
95	str r1, [r0]
96	ldr r0, REG_MOD_CONF_CTRL_0
97	ldr r1, VAL_MOD_CONF_CTRL_0
98	str r1, [r0]
99
100	/* Move to 1510 mode */
101	ldr r0, REG_COMP_MODE_CTRL_0
102	ldr r1, VAL_COMP_MODE_CTRL_0
103	str r1, [r0]
104
105	/* Set up Traffic Ctlr*/
106	ldr r0, REG_TC_IMIF_PRIO
107	mov r1, #0x0
108	str r1, [r0]
109	ldr r0, REG_TC_EMIFS_PRIO
110	str r1, [r0]
111	ldr r0, REG_TC_EMIFF_PRIO
112	str r1, [r0]
113
114	ldr r0, REG_TC_EMIFS_CONFIG
115	ldr r1, [r0]
116	bic r1, r1, #0x08 /* clear the global power-down enable PDE bit */
117	bic r1, r1, #0x01 /* write protect flash by clearing the WP bit */
118	str r1, [r0] /* EMIFS GlB Configuration. (value 0x12 most likely) */
119
120	/* Setup some clock domains */
121	ldr r1, =OMAP1510_CLKS
122	ldr r0, REG_ARM_IDLECT2
123	strh r1, [r0] /* CLKM, Clock domain control. */
124
125	mov r1, #0x01 /* PER_EN bit */
126	ldr r0, REG_ARM_RSTCT2
127	strh r1, [r0] /* CLKM; Peripheral reset. */
128
129	/* Set CLKM to Sync-Scalable */
130	/* I supposidly need to enable the dsp clock before switching */
131	mov r1, #0x1000
132	ldr r0, REG_ARM_SYSST
133	strh r1, [r0]
134	mov r0, #0x400
135	1:
136	subs r0, r0, #0x1 /* wait for any bubbles to finish */
137	bne 1b
138
139	ldr r1, VAL_ARM_CKCTL /* use 12Mhz ref, PER must be <= 50Mhz so /2 */
140	ldr r0, REG_ARM_CKCTL
141	strh r1, [r0]
142
143	/* setup DPLL 1 */
144	ldr r1, VAL_DPLL1_CTL
145	ldr r0, REG_DPLL1_CTL
146	strh r1, [r0]
147	ands r1, r1, #0x10 /* Check if PLL is enabled. */
148	beq lock_end /* Do not look for lock if BYPASS selected */
149	2:
150	ldrh r1, [r0]
151	ands r1, r1, #0x01 /* Check the LOCK bit. */
152	beq 2b /* ...loop until bit goes hi. */
153	lock_end:
154
155	/* Set memory timings corresponding to the new clock speed */
156
157	/* Check execution location to determine current execution location
158	* and branch to appropriate initialization code.
159	*/
160	mov r0, #0x10000000 /* Load physical SDRAM base. */
161	mov r1, pc /* Get current execution location. */
162	/* Zero all but top 6 bits of PC, as they alone detect whether an
163	* address is in the range 0x1000:0000-0x13ff:ffff, the 64M sized
164	* valid range for SDRAM on the OMAP 1510/5910.
165	*/
166	and r1, r1, #0xfc000000
167	cmp r1, r0 /* Compare. */
168	beq skip_sdram /* Skip over EMIF-fast initialization
169	* if running from SDRAM.
170	*/
171
172	/*
173	* Delay for SDRAM initialization.
174	*/
175	mov r3, #0x1800 /* value should be checked */
176	3:
177	subs r3, r3, #0x1 /* Decrement count */
178	bne 3b
179
180	/*
181	* Set SDRAM control values. Disable refresh before MRS command.
182	*/
183	ldr r0, VAL_TC_EMIFF_SDRAM_CONFIG /* get good value */
184	bic r3, r0, #0xC /* (BIT3\|BIT2) ulConfig with auto-refresh disabled. */
185	orr r3, r3, #0x8000000 /* (BIT27) Disable CLK when Power down or Self-Refresh */
186	orr r3, r3, #0x4000000 /* BIT26 Power Down Enable */
187	ldr r2, REG_TC_EMIFF_SDRAM_CONFIG /* Point to configuration register. */
188	str r3, [r2] /* Store the passed value with AR disabled. */
189
190	ldr r1, VAL_TC_EMIFF_MRS /* get MRS value */
191	ldr r2, REG_TC_EMIFF_MRS /* Point to MRS register. */
192	str r1, [r2] /* Store the passed value.*/
193
194	ldr r2, REG_TC_EMIFF_SDRAM_CONFIG /* Point to configuration register. */
195	str r0, [r2] /* Store the passed value. */
196
197	/*
198	* Delay for SDRAM initialization.
199	*/
200	mov r3, #0x1800
201	4:
202	subs r3, r3, #1 /* Decrement count. */
203	bne 4b
204
205	skip_sdram:
206
207	/* slow interface */
208	ldr r1, VAL_TC_EMIFS_CS0_CONFIG
209	ldr r0, REG_TC_EMIFS_CS0_CONFIG
210	str r1, [r0] /* Chip Select 0 */
211	ldr r1, VAL_TC_EMIFS_CS1_CONFIG
212	ldr r0, REG_TC_EMIFS_CS1_CONFIG
213	str r1, [r0] /* Chip Select 1 */
214	ldr r1, VAL_TC_EMIFS_CS2_CONFIG
215	ldr r0, REG_TC_EMIFS_CS2_CONFIG
216	str r1, [r0] /* Chip Select 2 */
217	ldr r1, VAL_TC_EMIFS_CS3_CONFIG
218	ldr r0, REG_TC_EMIFS_CS3_CONFIG
219	str r1, [r0] /* Chip Select 3 */
220
221	/* Next, Enable the RS232 Line Drivers in the FPGA. */
222	/* Also, power on the audio CODEC's amplifier here, */
223	/* which will make a noise on the audio output. */
224	/* This is done here instead of in the kernel so there */
225	/* isn't a loud popping noise at the start of each */
226	/* song. */
227	/* Also, disable the CODEC's clocks. */
228	/* omap1510-HelenP1 [specific] */
229
230	ldr r0, REG_FPGA_POWER
231	mov r1, #0
232	ldr r2, REG_FPGA_DIP_SWITCH
233	ldrb r3, [r2]
234	cmp r3, #0x8
235	movne r1, #0x62 /* Enable the RS232 Line Drivers in the EPLD */
236	strb r1, [r0]
237	ldr r0, REG_FPGA_AUDIO
238	mov r1, #0x0 /* Disable sound driver (CODEC clocks) */
239	strb r1, [r0]
240
241	/* back to arch calling code */
242	mov pc, lr
243
244	/* the literal pools origin */
245	.ltorg
246
247	/* OMAP configuration registers */
248	REG_FUNC_MUX_CTRL_0: /* 32 bits */
249	.word 0xfffe1000
250	REG_FUNC_MUX_CTRL_1: /* 32 bits */
251	.word 0xfffe1004
252	REG_FUNC_MUX_CTRL_2: /* 32 bits */
253	.word 0xfffe1008
254	REG_COMP_MODE_CTRL_0: /* 32 bits */
255	.word 0xfffe100c
256	REG_FUNC_MUX_CTRL_3: /* 32 bits */
257	.word 0xfffe1010
258	REG_FUNC_MUX_CTRL_4: /* 32 bits */
259	.word 0xfffe1014
260	REG_FUNC_MUX_CTRL_5: /* 32 bits */
261	.word 0xfffe1018
262	REG_FUNC_MUX_CTRL_6: /* 32 bits */
263	.word 0xfffe101c
264	REG_FUNC_MUX_CTRL_7: /* 32 bits */
265	.word 0xfffe1020
266	REG_FUNC_MUX_CTRL_8: /* 32 bits */
267	.word 0xfffe1024
268	REG_FUNC_MUX_CTRL_9: /* 32 bits */
269	.word 0xfffe1028
270	REG_FUNC_MUX_CTRL_A: /* 32 bits */
271	.word 0xfffe102C
272	REG_FUNC_MUX_CTRL_B: /* 32 bits */
273	.word 0xfffe1030
274	REG_FUNC_MUX_CTRL_C: /* 32 bits */
275	.word 0xfffe1034
276	REG_FUNC_MUX_CTRL_D: /* 32 bits */
277	.word 0xfffe1038
278	REG_PULL_DWN_CTRL_0: /* 32 bits */
279	.word 0xfffe1040
280	REG_PULL_DWN_CTRL_1: /* 32 bits */
281	.word 0xfffe1044
282	REG_PULL_DWN_CTRL_2: /* 32 bits */
283	.word 0xfffe1048
284	REG_PULL_DWN_CTRL_3: /* 32 bits */
285	.word 0xfffe104c
286	REG_VOLTAGE_CTRL_0: /* 32 bits */
287	.word 0xfffe1060
288	REG_TEST_DBG_CTRL_0: /* 32 bits */
289	.word 0xfffe1070
290	REG_MOD_CONF_CTRL_0: /* 32 bits */
291	.word 0xfffe1080
292	REG_TC_IMIF_PRIO: /* 32 bits */
293	.word 0xfffecc00
294	REG_TC_EMIFS_PRIO: /* 32 bits */
295	.word 0xfffecc04
296	REG_TC_EMIFF_PRIO: /* 32 bits */
297	.word 0xfffecc08
298	REG_TC_EMIFS_CONFIG: /* 32 bits */
299	.word 0xfffecc0c
300	REG_TC_EMIFS_CS0_CONFIG: /* 32 bits */
301	.word 0xfffecc10
302	REG_TC_EMIFS_CS1_CONFIG: /* 32 bits */
303	.word 0xfffecc14
304	REG_TC_EMIFS_CS2_CONFIG: /* 32 bits */
305	.word 0xfffecc18
306	REG_TC_EMIFS_CS3_CONFIG: /* 32 bits */
307	.word 0xfffecc1c
308	REG_TC_EMIFF_SDRAM_CONFIG: /* 32 bits */
309	.word 0xfffecc20
310	REG_TC_EMIFF_MRS: /* 32 bits */
311	.word 0xfffecc24
312	/* MPU clock/reset/power mode control registers */
313	REG_ARM_CKCTL: /* 16 bits */
314	.word 0xfffece00
315	REG_ARM_IDLECT2: /* 16 bits */
316	.word 0xfffece08
317	REG_ARM_RSTCT2: /* 16 bits */
318	.word 0xfffece14
319	REG_ARM_SYSST: /* 16 bits */
320	.word 0xfffece18
321	/* DPLL control registers */
322	REG_DPLL1_CTL: /* 16 bits */
323	.word 0xfffecf00
324	/* identification code register */
325	REG_IDCODE: /* 32 bits */
326	.word 0xfffed404
327
328	/* Innovator specific */
329	REG_FPGA_LED_DIGIT: /* 8 bits (not used on Innovator) */
330	.word 0x08000003
331	REG_FPGA_POWER: /* 8 bits */
332	.word 0x08000005
333	REG_FPGA_AUDIO: /* 8 bits (not used on Innovator) */
334	.word 0x0800000c
335	REG_FPGA_DIP_SWITCH: /* 8 bits (not used on Innovator) */
336	.word 0x0800000e
337
338	VAL_COMP_MODE_CTRL_0:
339	.word 0x0000eaef
340	VAL_FUNC_MUX_CTRL_4:
341	.word 0x00000000
342	VAL_FUNC_MUX_CTRL_5:
343	.word 0x00000000
344	VAL_FUNC_MUX_CTRL_6:
345	.word 0x00000001
346	VAL_FUNC_MUX_CTRL_7:
347	.word 0x00000000
348	VAL_FUNC_MUX_CTRL_8:
349	.word 0x10001200
350	VAL_FUNC_MUX_CTRL_9:
351	.word 0x01201012
352	VAL_FUNC_MUX_CTRL_A:
353	.word 0x00000248
354	VAL_FUNC_MUX_CTRL_B:
355	.word 0x00000248
356	VAL_FUNC_MUX_CTRL_C:
357	.word 0x09000000
358	VAL_FUNC_MUX_CTRL_D:
359	.word 0x00000000
360	VAL_PULL_DWN_CTRL_0:
361	.word 0x11a10000
362	VAL_PULL_DWN_CTRL_1:
363	.word 0x2e047fff
364	VAL_PULL_DWN_CTRL_2:
365	.word 0xffd603a6
366	VAL_PULL_DWN_CTRL_3:
367	.word 0x00003e03
368	VAL_VOLTAGE_CTRL_0:
369	.word 0x00000007
370	VAL_TEST_DBG_CTRL_0:
371	/* See Errata 4.13, This works around a SRAM bug, for chips below ES2.5 .
372	* This slows down internal SRAM accesses.
373	*/
374	.word 0x00000007
375	VAL_MOD_CONF_CTRL_0:
376	.word 0x0b000008
377	VAL_ARM_CKCTL:
378	.word 0x010f
379	VAL_DPLL1_CTL:
380	.word 0x2710
381	VAL_TC_EMIFS_CS1_CONFIG_PRELIM:
382	.word 0x00001149
383	VAL_TC_EMIFS_CS2_CONFIG_PRELIM:
384	.word 0x00004158
385	VAL_TC_EMIFS_CS0_CONFIG:
386	.word 0x002130b0
387	VAL_TC_EMIFS_CS1_CONFIG:
388	.word 0x0000f559
389	VAL_TC_EMIFS_CS2_CONFIG:
390	.word 0x000055f0
391	VAL_TC_EMIFS_CS3_CONFIG:
392	.word 0x00003331
393	VAL_TC_EMIFF_SDRAM_CONFIG:
394	.word 0x010290fc
395	VAL_TC_EMIFF_MRS:
396	.word 0x00000027

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