1/*
2 * Copyright (C) 2007, Guennadi Liakhovetski <lg@denx.de>
3 *
4 * (C) Copyright 2008-2010 Freescale Semiconductor, Inc.
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License as
8 * published by the Free Software Foundation; either version 2 of
9 * the License, or (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
19 * MA 02111-1307 USA
20 */
21
22#include <config.h>
23#include <asm/arch/imx-regs.h>
24#include <generated/asm-offsets.h>
25#include "mx35pdk.h"
26
27/*
28 * return soc version
29 * 	0x10:  TO1
30 *	0x20:  TO2
31 *	0x30:  TO3
32 */
33.macro check_soc_version ret, tmp
34	ldr \tmp, =IIM_BASE_ADDR
35	ldr \ret, [\tmp, #IIM_SREV]
36	cmp \ret, #0x00
37	moveq \tmp, #ROMPATCH_REV
38	ldreq \ret, [\tmp]
39	moveq \ret, \ret, lsl #4
40	addne \ret, \ret, #0x10
41.endm
42
43/*
44 * AIPS setup - Only setup MPROTx registers.
45 * The PACR default values are good.
46 */
47.macro init_aips
48	/*
49	 * Set all MPROTx to be non-bufferable, trusted for R/W,
50	 * not forced to user-mode.
51	 */
52	ldr r0, =AIPS1_BASE_ADDR
53	ldr r1, =AIPS_MPR_CONFIG
54	str r1, [r0, #0x00]
55	str r1, [r0, #0x04]
56	ldr r0, =AIPS2_BASE_ADDR
57	str r1, [r0, #0x00]
58	str r1, [r0, #0x04]
59
60	/*
61	 * Clear the on and off peripheral modules Supervisor Protect bit
62	 * for SDMA to access them. Did not change the AIPS control registers
63	 * (offset 0x20) access type
64	 */
65	ldr r0, =AIPS1_BASE_ADDR
66	ldr r1, =AIPS_OPACR_CONFIG
67	str r1, [r0, #0x40]
68	str r1, [r0, #0x44]
69	str r1, [r0, #0x48]
70	str r1, [r0, #0x4C]
71	str r1, [r0, #0x50]
72	ldr r0, =AIPS2_BASE_ADDR
73	str r1, [r0, #0x40]
74	str r1, [r0, #0x44]
75	str r1, [r0, #0x48]
76	str r1, [r0, #0x4C]
77	str r1, [r0, #0x50]
78.endm
79
80/* MAX (Multi-Layer AHB Crossbar Switch) setup */
81.macro init_max
82	ldr r0, =MAX_BASE_ADDR
83	/* MPR - priority is M4 > M2 > M3 > M5 > M0 > M1 */
84	ldr r1, =MAX_MPR_CONFIG
85	str r1, [r0, #0x000]        /* for S0 */
86	str r1, [r0, #0x100]        /* for S1 */
87	str r1, [r0, #0x200]        /* for S2 */
88	str r1, [r0, #0x300]        /* for S3 */
89	str r1, [r0, #0x400]        /* for S4 */
90	/* SGPCR - always park on last master */
91	ldr r1, =MAX_SGPCR_CONFIG
92	str r1, [r0, #0x010]        /* for S0 */
93	str r1, [r0, #0x110]        /* for S1 */
94	str r1, [r0, #0x210]        /* for S2 */
95	str r1, [r0, #0x310]        /* for S3 */
96	str r1, [r0, #0x410]        /* for S4 */
97	/* MGPCR - restore default values */
98	ldr r1, =MAX_MGPCR_CONFIG
99	str r1, [r0, #0x800]        /* for M0 */
100	str r1, [r0, #0x900]        /* for M1 */
101	str r1, [r0, #0xA00]        /* for M2 */
102	str r1, [r0, #0xB00]        /* for M3 */
103	str r1, [r0, #0xC00]        /* for M4 */
104	str r1, [r0, #0xD00]        /* for M5 */
105.endm
106
107/* M3IF setup */
108.macro init_m3if
109	/* Configure M3IF registers */
110	ldr r1, =M3IF_BASE_ADDR
111	/*
112	* M3IF Control Register (M3IFCTL)
113	* MRRP[0] = L2CC0 not on priority list (0 << 0)	= 0x00000000
114	* MRRP[1] = L2CC1 not on priority list (0 << 0)	= 0x00000000
115	* MRRP[2] = MBX not on priority list (0 << 0)	= 0x00000000
116	* MRRP[3] = MAX1 not on priority list (0 << 0)	= 0x00000000
117	* MRRP[4] = SDMA not on priority list (0 << 0)	= 0x00000000
118	* MRRP[5] = MPEG4 not on priority list (0 << 0)	= 0x00000000
119	* MRRP[6] = IPU1 on priority list (1 << 6)	= 0x00000040
120	* MRRP[7] = IPU2 not on priority list (0 << 0)	= 0x00000000
121	*						------------
122	*						  0x00000040
123	*/
124	ldr r0, =M3IF_CONFIG
125	str r0, [r1]  /* M3IF control reg */
126.endm
127
128/* CPLD on CS5 setup */
129.macro init_debug_board
130	ldr r0, =DBG_BASE_ADDR
131	ldr r1, =DBG_CSCR_U_CONFIG
132	str r1, [r0, #0x00]
133	ldr r1, =DBG_CSCR_L_CONFIG
134	str r1, [r0, #0x04]
135	ldr r1, =DBG_CSCR_A_CONFIG
136	str r1, [r0, #0x08]
137.endm
138
139/* clock setup */
140.macro init_clock
141	ldr r0, =CCM_BASE_ADDR
142
143	/* default CLKO to 1/32 of the ARM core*/
144	ldr r1, [r0, #CLKCTL_COSR]
145	bic r1, r1, #0x00000FF00
146	bic r1, r1, #0x0000000FF
147	mov r2, #0x00006C00
148	add r2, r2, #0x67
149	orr r1, r1, r2
150	str r1, [r0, #CLKCTL_COSR]
151
152	ldr r2, =CCM_CCMR_CONFIG
153	str r2, [r0, #CLKCTL_CCMR]
154
155	check_soc_version r1, r2
156	cmp r1, #CHIP_REV_2_0
157	ldrhs r3, =CCM_MPLL_532_HZ
158	bhs 1f
159	ldr r2, [r0, #CLKCTL_PDR0]
160	tst r2, #CLKMODE_CONSUMER
161	ldrne r3, =CCM_MPLL_532_HZ  /* consumer path*/
162	ldreq r3, =CCM_MPLL_399_HZ  /* auto path*/
1631:
164	str r3, [r0, #CLKCTL_MPCTL]
165
166	ldr r1, =CCM_PPLL_300_HZ
167	str r1, [r0, #CLKCTL_PPCTL]
168
169	ldr r1, =CCM_PDR0_CONFIG
170	bic r1, r1, #0x800000
171	str r1, [r0, #CLKCTL_PDR0]
172
173	ldr r1, [r0, #CLKCTL_CGR0]
174	orr r1, r1, #0x0C300000
175	str r1, [r0, #CLKCTL_CGR0]
176
177	ldr r1, [r0, #CLKCTL_CGR1]
178	orr r1, r1, #0x00000C00
179	orr r1, r1, #0x00000003
180	str r1, [r0, #CLKCTL_CGR1]
181.endm
182
183.macro setup_sdram
184	ldr r0, =ESDCTL_BASE_ADDR
185	mov r3, #0x2000
186	str r3, [r0, #0x0]
187	str r3, [r0, #0x8]
188
189	/*ip(r12) has used to save lr register in upper calling*/
190	mov fp, lr
191
192	mov r5, #0x00
193	mov r2, #0x00
194	mov r1, #CSD0_BASE_ADDR
195	bl setup_sdram_bank
196
197	mov r5, #0x00
198	mov r2, #0x00
199	mov r1, #CSD1_BASE_ADDR
200	bl setup_sdram_bank
201
202	mov lr, fp
203
2041:
205	ldr r3, =ESDCTL_DELAY_LINE5
206	str r3, [r0, #0x30]
207.endm
208
209.globl lowlevel_init
210lowlevel_init:
211	mov r10, lr
212
213	mrc 15, 0, r1, c1, c0, 0
214
215	mrc 15, 0, r0, c1, c0, 1
216	orr r0, r0, #7
217	mcr 15, 0, r0, c1, c0, 1
218	orr r1, r1, #(1<<11)
219
220	/* Set unaligned access enable */
221	orr r1, r1, #(1<<22)
222
223	/* Set low int latency enable */
224	orr r1, r1, #(1<<21)
225
226	mcr 15, 0, r1, c1, c0, 0
227
228	mov r0, #0
229
230	/* Set branch prediction enable */
231	mcr 15, 0, r0, c15, c2, 4
232
233	mcr 15, 0, r0, c7, c7, 0        /* invalidate I cache and D cache */
234	mcr 15, 0, r0, c8, c7, 0        /* invalidate TLBs */
235	mcr 15, 0, r0, c7, c10, 4       /* Drain the write buffer */
236
237	/*
238	 * initializes very early AIPS
239	 * Then it also initializes Multi-Layer AHB Crossbar Switch,
240	 * M3IF
241	 * Also setup the Peripheral Port Remap register inside the core
242	 */
243	ldr r0, =0x40000015        /* start from AIPS 2GB region */
244	mcr p15, 0, r0, c15, c2, 4
245
246	init_aips
247
248	init_max
249
250	init_m3if
251
252	init_clock
253	init_debug_board
254
255	cmp pc, #PHYS_SDRAM_1
256	blo init_sdram_start
257	cmp pc, #(PHYS_SDRAM_1 + PHYS_SDRAM_1_SIZE)
258	blo skip_sdram_setup
259
260init_sdram_start:
261	/*init_sdram*/
262	setup_sdram
263
264skip_sdram_setup:
265	mov lr, r10
266	mov pc, lr
267
268
269/*
270 * r0: ESDCTL control base, r1: sdram slot base
271 * r2: DDR type(0:DDR2, 1:MDDR) r3, r4:working base
272 */
273setup_sdram_bank:
274	mov r3, #0xE
275	tst r2, #0x1
276	orreq r3, r3, #0x300 /*DDR2*/
277	str r3, [r0, #0x10]
278	bic r3, r3, #0x00A
279	str r3, [r0, #0x10]
280	beq 2f
281
282	mov r3, #0x20000
2831:      subs r3, r3, #1
284	bne 1b
285
2862:      tst r2, #0x1
287	ldreq r3, =ESDCTL_DDR2_CONFIG
288	ldrne r3, =ESDCTL_MDDR_CONFIG
289	cmp r1, #CSD1_BASE_ADDR
290	strlo r3, [r0, #0x4]
291	strhs r3, [r0, #0xC]
292
293	ldr r3, =ESDCTL_0x92220000
294	strlo r3, [r0, #0x0]
295	strhs r3, [r0, #0x8]
296	mov r3, #0xDA
297	ldr r4, =ESDCTL_PRECHARGE
298	strb r3, [r1, r4]
299
300	tst r2, #0x1
301	bne skip_set_mode
302
303	cmp r1, #CSD1_BASE_ADDR
304	ldr r3, =ESDCTL_0xB2220000
305	strlo r3, [r0, #0x0]
306	strhs r3, [r0, #0x8]
307	mov r3, #0xDA
308	ldr r4, =ESDCTL_DDR2_EMR2
309	strb r3, [r1, r4]
310	ldr r4, =ESDCTL_DDR2_EMR3
311	strb r3, [r1, r4]
312	ldr r4, =ESDCTL_DDR2_EN_DLL
313	strb r3, [r1, r4]
314	ldr r4, =ESDCTL_DDR2_RESET_DLL
315	strb r3, [r1, r4]
316
317	ldr r3, =ESDCTL_0x92220000
318	strlo r3, [r0, #0x0]
319	strhs r3, [r0, #0x8]
320	mov r3, #0xDA
321	ldr r4, =ESDCTL_PRECHARGE
322	strb r3, [r1, r4]
323
324skip_set_mode:
325	cmp r1, #CSD1_BASE_ADDR
326	ldr r3, =ESDCTL_0xA2220000
327	strlo r3, [r0, #0x0]
328	strhs r3, [r0, #0x8]
329	mov r3, #0xDA
330	strb r3, [r1]
331	strb r3, [r1]
332
333	ldr r3, =ESDCTL_0xB2220000
334	strlo r3, [r0, #0x0]
335	strhs r3, [r0, #0x8]
336	tst r2, #0x1
337	ldreq r4, =ESDCTL_DDR2_MR
338	ldrne r4, =ESDCTL_MDDR_MR
339	mov r3, #0xDA
340	strb r3, [r1, r4]
341	ldreq r4, =ESDCTL_DDR2_OCD_DEFAULT
342	streqb r3, [r1, r4]
343	ldreq r4, =ESDCTL_DDR2_EN_DLL
344	ldrne r4, =ESDCTL_MDDR_EMR
345	strb r3, [r1, r4]
346
347	cmp r1, #CSD1_BASE_ADDR
348	ldr r3, =ESDCTL_0x82228080
349	strlo r3, [r0, #0x0]
350	strhs r3, [r0, #0x8]
351
352	tst r2, #0x1
353	moveq r4, #0x20000
354	movne r4, #0x200
3551:      subs r4, r4, #1
356	bne 1b
357
358	str r3, [r1, #0x100]
359	ldr r4, [r1, #0x100]
360	cmp r3, r4
361	movne r3, #1
362	moveq r3, #0
363
364	mov pc, lr
365