summaryrefslogtreecommitdiffstats
path: root/arch/arm/cpu/armv7/omap-common/hwinit-common.c
blob: 01c2d576c99ba5b5c088a55636f35141c2458a5c (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
/*
 *
 * Common functions for OMAP4/5 based boards
 *
 * (C) Copyright 2010
 * Texas Instruments, <www.ti.com>
 *
 * Author :
 *	Aneesh V	<aneesh@ti.com>
 *	Steve Sakoman	<steve@sakoman.com>
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */
#include <common.h>
#include <spl.h>
#include <asm/arch/sys_proto.h>
#include <linux/sizes.h>
#include <asm/emif.h>
#include <asm/omap_common.h>
#include <linux/compiler.h>
#include <asm/system.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_mux_conf_regs(void)
{
	switch (omap_hw_init_context()) {
	case OMAP_INIT_CONTEXT_SPL:
		set_muxconf_regs();
		break;
	case OMAP_INIT_CONTEXT_UBOOT_AFTER_SPL:
		break;
	case OMAP_INIT_CONTEXT_UBOOT_FROM_NOR:
	case OMAP_INIT_CONTEXT_UBOOT_AFTER_CH:
		set_muxconf_regs();
		break;
	}
}

u32 cortex_rev(void)
{

	unsigned int rev;

	/* Read Main ID Register (MIDR) */
	asm ("mrc p15, 0, %0, c0, c0, 0" : "=r" (rev));

	return rev;
}

static void omap_rev_string(void)
{
	u32 omap_rev = omap_revision();
	u32 soc_variant	= (omap_rev & 0xF0000000) >> 28;
	u32 omap_variant = (omap_rev & 0xFFFF0000) >> 16;
	u32 major_rev = (omap_rev & 0x00000F00) >> 8;
	u32 minor_rev = (omap_rev & 0x000000F0) >> 4;

	if (soc_variant)
		printf("OMAP");
	else
		printf("DRA");
	printf("%x ES%x.%x\n", omap_variant, major_rev,
	       minor_rev);
}

#ifdef CONFIG_SPL_BUILD
void spl_display_print(void)
{
	omap_rev_string();
}
#endif

void __weak srcomp_enable(void)
{
}

/**
 * do_board_detect() - Detect board description
 *
 * Function to detect board description. This is expected to be
 * overridden in the SoC family board file where desired.
 */
void __weak do_board_detect(void)
{
}

void s_init(void)
{
}

/**
 * early_system_init - Does Early system initialization.
 *
 * 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 when
 *   1. SPL running from SRAM
 *   2. U-Boot running from FLASH
 *   3. U-Boot loaded to SDRAM by SPL
 *   4. 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 early_system_init(void)
{
	init_omap_revision();
	hw_data_init();

#ifdef CONFIG_SPL_BUILD
	if (warm_reset() &&
	    (is_omap44xx() || (omap_revision() == OMAP5430_ES1_0)))
		force_emif_self_refresh();
#endif
	watchdog_init();
	set_mux_conf_regs();
#ifdef CONFIG_SPL_BUILD
	srcomp_enable();
	do_io_settings();
#endif
	setup_early_clocks();
	do_board_detect();
	prcm_init();
}

#ifdef CONFIG_SPL_BUILD
void board_init_f(ulong dummy)
{
	early_system_init();
#ifdef CONFIG_BOARD_EARLY_INIT_F
	board_early_init_f();
#endif
	/* For regular u-boot sdram_init() is called from dram_init() */
	sdram_init();
}
#endif

int arch_cpu_init_dm(void)
{
	early_system_init();
	return 0;
}

/*
 * 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 omap_sdram_size(void)
{
	u32 section, i, valid;
	u64 sdram_start = 0, sdram_end = 0, addr,
	    size, total_size = 0, trap_size = 0, trap_start = 0;

	for (i = 0; i < 4; i++) {
		section	= __raw_readl(DMM_BASE + i*4);
		valid = (section & EMIF_SDRC_ADDRSPC_MASK) >>
			(EMIF_SDRC_ADDRSPC_SHIFT);
		addr = section & EMIF_SYS_ADDR_MASK;

		/* See if the address is valid */
		if ((addr >= TI_ARMV7_DRAM_ADDR_SPACE_START) &&
		    (addr < TI_ARMV7_DRAM_ADDR_SPACE_END)) {
			size = ((section & EMIF_SYS_SIZE_MASK) >>
				   EMIF_SYS_SIZE_SHIFT);
			size = 1 << size;
			size *= SZ_16M;

			if (valid != DMM_SDRC_ADDR_SPC_INVALID) {
				if (!sdram_start || (addr < sdram_start))
					sdram_start = addr;
				if (!sdram_end || ((addr + size) > sdram_end))
					sdram_end = addr + size;
			} else {
				trap_size = size;
				trap_start = addr;
			}
		}
	}

	if ((trap_start >= sdram_start) && (trap_start < sdram_end))
		total_size = (sdram_end - sdram_start) - (trap_size);
	else
		total_size = sdram_end - sdram_start;

	return total_size;
}


/*
 * Routine: dram_init
 * Description: sets uboots idea of sdram size
 */
int dram_init(void)
{
	sdram_init();
	gd->ram_size = omap_sdram_size();
	return 0;
}

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

/*
 *  get_device_type(): tell if GP/HS/EMU/TST
 */
u32 get_device_type(void)
{
	return (readl((*ctrl)->control_status) &
				      (DEVICE_TYPE_MASK)) >> DEVICE_TYPE_SHIFT;
}

#if defined(CONFIG_DISPLAY_CPUINFO)
/*
 * Print CPU information
 */
int print_cpuinfo(void)
{
	puts("CPU  : ");
	omap_rev_string();

	return 0;
}
#endif
OpenPOWER on IntegriCloud