aboutsummaryrefslogtreecommitdiff
path: root/arch/arm/cpu/armv7/omap4/board.c
blob: 3fd6f8459f83e8bb94e7d83ca2092d14bdbdfb00 (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
/*
 *
 * Common functions for OMAP4 based boards
 *
 * (C) Copyright 2010
 * Texas Instruments, <www.ti.com>
 *
 * Author :
 *	Aneesh V	<aneesh@ti.com>
 *	Steve Sakoman	<steve@sakoman.com>
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of
 * the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 */
#include <common.h>
#include <asm/arch/cpu.h>
#include <asm/arch/sys_proto.h>
#include <asm/sizes.h>
#include "omap4_mux_data.h"

DECLARE_GLOBAL_DATA_PTR;

void do_set_mux(u32 base, struct pad_conf_entry const *array, int size)
{
	int i;
	struct pad_conf_entry *pad = (struct pad_conf_entry *) array;

	for (i = 0; i < size; i++, pad++)
		writew(pad->val, base + pad->offset);
}

static void set_muxconf_regs_essential(void)
{
	do_set_mux(CONTROL_PADCONF_CORE, core_padconf_array_essential,
		   sizeof(core_padconf_array_essential) /
		   sizeof(struct pad_conf_entry));

	do_set_mux(CONTROL_PADCONF_WKUP, wkup_padconf_array_essential,
		   sizeof(wkup_padconf_array_essential) /
		   sizeof(struct pad_conf_entry));
}

static void set_mux_conf_regs(void)
{
	switch (omap4_hw_init_context()) {
	case OMAP_INIT_CONTEXT_SPL:
		set_muxconf_regs_essential();
		break;
	case OMAP_INIT_CONTEXT_UBOOT_AFTER_SPL:
		set_muxconf_regs_non_essential();
		break;
	case OMAP_INIT_CONTEXT_UBOOT_FROM_NOR:
	case OMAP_INIT_CONTEXT_UBOOT_AFTER_CH:
		set_muxconf_regs_essential();
		set_muxconf_regs_non_essential();
		break;
	}
}

/*
 * Routine: s_init
 * Description: Does early system init of watchdog, muxing,  andclocks
 * Watchdog disable is done always. For the rest what gets done
 * depends on the boot mode in which this function is executed
 *   1. s_init of SPL running from SRAM
 *   2. s_init of U-Boot running from FLASH
 *   3. s_init of U-Boot loaded to SDRAM by SPL
 *   4. s_init of U-Boot loaded to SDRAM by ROM code using the
 *	Configuration Header feature
 * Please have a look at the respective functions to see what gets
 * done in each of these cases
 * This function is called with SRAM stack.
 */
void s_init(void)
{
	watchdog_init();
	set_mux_conf_regs();
}

/*
 * Routine: wait_for_command_complete
 * Description: Wait for posting to finish on watchdog
 */
void wait_for_command_complete(struct watchdog *wd_base)
{
	int pending = 1;
	do {
		pending = readl(&wd_base->wwps);
	} while (pending);
}

/*
 * Routine: watchdog_init
 * Description: Shut down watch dogs
 */
void watchdog_init(void)
{
	struct watchdog *wd2_base = (struct watchdog *)WDT2_BASE;

	writel(WD_UNLOCK1, &wd2_base->wspr);
	wait_for_command_complete(wd2_base);
	writel(WD_UNLOCK2, &wd2_base->wspr);
}


/*
 * This function finds the SDRAM size available in the system
 * based on DMM section configurations
 * This is needed because the size of memory installed may be
 * different on different versions of the board
 */
u32 sdram_size(void)
{
	u32 section, i, total_size = 0, size, addr;
	for (i = 0; i < 4; i++) {
		section	= __raw_readl(DMM_LISA_MAP_BASE + i*4);
		addr = section & DMM_LISA_MAP_SYS_ADDR_MASK;
		/* See if the address is valid */
		if ((addr >= OMAP44XX_DRAM_ADDR_SPACE_START) &&
		    (addr < OMAP44XX_DRAM_ADDR_SPACE_END)) {
			size	= ((section & DMM_LISA_MAP_SYS_SIZE_MASK) >>
				    DMM_LISA_MAP_SYS_SIZE_SHIFT);
			size	= 1 << size;
			size	*= SZ_16M;
			total_size += size;
		}
	}
	return total_size;
}


/*
 * Routine: dram_init
 * Description: sets uboots idea of sdram size
 */
int dram_init(void)
{

	gd->ram_size = sdram_size();

	return 0;
}

/*
 * Print board information
 */
int checkboard(void)
{
	puts(sysinfo.board_string);
	return 0;
}

/*
* This function is called by start_armboot. You can reliably use static
* data. Any boot-time function that require static data should be
* called from here
*/
int arch_cpu_init(void)
{
	return 0;
}

#ifndef CONFIG_SYS_L2CACHE_OFF
void v7_outer_cache_enable(void)
{
	set_pl310_ctrl_reg(1);
}

void v7_outer_cache_disable(void)
{
	set_pl310_ctrl_reg(0);
}
#endif