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
|
/*
* (C) Copyright 2010
* Texas Instruments, <www.ti.com>
*
* Author :
* Mansoor Ahamed <mansoor.ahamed@ti.com>
*
* Initial Code from:
* Manikandan Pillai <mani.pillai@ti.com>
* Richard Woodruff <r-woodruff2@ti.com>
* Syed Mohammed Khasim <khasim@ti.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <asm/io.h>
#include <asm/arch/cpu.h>
#include <asm/arch/mem.h>
#include <asm/arch/sys_proto.h>
#include <command.h>
#include <linux/mtd/omap_gpmc.h>
struct gpmc *gpmc_cfg;
#if defined(CONFIG_OMAP34XX)
/********************************************************
* mem_ok() - test used to see if timings are correct
* for a part. Helps in guessing which part
* we are currently using.
*******************************************************/
u32 mem_ok(u32 cs)
{
u32 val1, val2, addr;
u32 pattern = 0x12345678;
addr = OMAP34XX_SDRC_CS0 + get_sdr_cs_offset(cs);
writel(0x0, addr + 0x400); /* clear pos A */
writel(pattern, addr); /* pattern to pos B */
writel(0x0, addr + 4); /* remove pattern off the bus */
val1 = readl(addr + 0x400); /* get pos A value */
val2 = readl(addr); /* get val2 */
writel(0x0, addr + 0x400); /* clear pos A */
if ((val1 != 0) || (val2 != pattern)) /* see if pos A val changed */
return 0;
else
return 1;
}
#endif
void enable_gpmc_cs_config(const u32 *gpmc_config, struct gpmc_cs *cs, u32 base,
u32 size)
{
writel(0, &cs->config7);
sdelay(1000);
/* Delay for settling */
writel(gpmc_config[0], &cs->config1);
writel(gpmc_config[1], &cs->config2);
writel(gpmc_config[2], &cs->config3);
writel(gpmc_config[3], &cs->config4);
writel(gpmc_config[4], &cs->config5);
writel(gpmc_config[5], &cs->config6);
/* Enable the config */
writel((((size & 0xF) << 8) | ((base >> 24) & 0x3F) |
(1 << 6)), &cs->config7);
sdelay(2000);
}
/*****************************************************
* gpmc_init(): init gpmc bus
* Init GPMC for x16, MuxMode (SDRAM in x32).
* This code can only be executed from SRAM or SDRAM.
*****************************************************/
void gpmc_init(void)
{
/* putting a blanket check on GPMC based on ZeBu for now */
gpmc_cfg = (struct gpmc *)GPMC_BASE;
#if defined(CONFIG_NOR)
/* configure GPMC for NOR */
const u32 gpmc_regs[GPMC_MAX_REG] = { STNOR_GPMC_CONFIG1,
STNOR_GPMC_CONFIG2,
STNOR_GPMC_CONFIG3,
STNOR_GPMC_CONFIG4,
STNOR_GPMC_CONFIG5,
STNOR_GPMC_CONFIG6,
STNOR_GPMC_CONFIG7
};
u32 base = CONFIG_SYS_FLASH_BASE;
u32 size = (CONFIG_SYS_FLASH_SIZE > 0x08000000) ? GPMC_SIZE_256M :
/* > 64MB */ ((CONFIG_SYS_FLASH_SIZE > 0x04000000) ? GPMC_SIZE_128M :
/* > 32MB */ ((CONFIG_SYS_FLASH_SIZE > 0x02000000) ? GPMC_SIZE_64M :
/* > 16MB */ ((CONFIG_SYS_FLASH_SIZE > 0x01000000) ? GPMC_SIZE_32M :
/* min 16MB */ GPMC_SIZE_16M)));
#elif defined(CONFIG_NAND) || defined(CONFIG_CMD_NAND)
/* configure GPMC for NAND */
const u32 gpmc_regs[GPMC_MAX_REG] = { M_NAND_GPMC_CONFIG1,
M_NAND_GPMC_CONFIG2,
M_NAND_GPMC_CONFIG3,
M_NAND_GPMC_CONFIG4,
M_NAND_GPMC_CONFIG5,
M_NAND_GPMC_CONFIG6,
0
};
u32 base = CONFIG_SYS_NAND_BASE;
u32 size = GPMC_SIZE_16M;
#elif defined(CONFIG_CMD_ONENAND)
const u32 gpmc_regs[GPMC_MAX_REG] = { ONENAND_GPMC_CONFIG1,
ONENAND_GPMC_CONFIG2,
ONENAND_GPMC_CONFIG3,
ONENAND_GPMC_CONFIG4,
ONENAND_GPMC_CONFIG5,
ONENAND_GPMC_CONFIG6,
0
};
u32 size = GPMC_SIZE_128M;
u32 base = CONFIG_SYS_ONENAND_BASE;
#else
const u32 gpmc_regs[GPMC_MAX_REG] = { 0, 0, 0, 0, 0, 0, 0 };
u32 size = 0;
u32 base = 0;
#endif
/* global settings */
writel(0x00000008, &gpmc_cfg->sysconfig);
writel(0x00000000, &gpmc_cfg->irqstatus);
writel(0x00000000, &gpmc_cfg->irqenable);
/* disable timeout, set a safe reset value */
writel(0x00001ff0, &gpmc_cfg->timeout_control);
#ifdef CONFIG_NOR
writel(0x00000200, &gpmc_cfg->config);
#else
writel(0x00000012, &gpmc_cfg->config);
#endif
/*
* Disable the GPMC0 config set by ROM code
*/
writel(0, &gpmc_cfg->cs[0].config7);
sdelay(1000);
/* enable chip-select specific configurations */
if (base != 0)
enable_gpmc_cs_config(gpmc_regs, &gpmc_cfg->cs[0], base, size);
}
|
