blob: 3f5822ec239c0c3d52223ca75a4152a89cdc5f79 [file] [log] [blame]
Stefan Roese105350e2008-03-11 16:51:17 +01001/*
2 * (C) Copyright 2008
3 * Stefan Roese, DENX Software Engineering, sr@denx.de.
4 *
5 * See file CREDITS for list of people who contributed to this
6 * project.
7 *
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of
11 * the License, or (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
21 * MA 02111-1307 USA
22 *
23 */
24
25#include <common.h>
26#include <command.h>
27#include <i2c.h>
28#include <asm/io.h>
29
30/*
31 * NOR and NAND boot options change bytes 6, 7, 8, 9, 11. The
32 * values are independent of the rest of the clock settings.
33 */
34
35#define NAND_COMPATIBLE 0x01
36#define NOR_COMPATIBLE 0x02
37
38#define I2C_EEPROM_ADDR 0x52
39
40static char *config_labels[] = {
41 "CPU: 600 PLB: 200 OPB: 100 EBC: 100",
42 "CPU: 800 PLB: 200 OPB: 100 EBC: 100",
43 NULL
44};
45
46static u8 boot_configs[][17] = {
47 {
48 (NOR_COMPATIBLE),
49 0x86, 0x80, 0xce, 0x1f, 0x79, 0x80, 0x00, 0xa0, 0x40, 0x08,
50 0x23, 0x50, 0x0d, 0x95, 0x00, 0x00
51 },
52 {
53 (NOR_COMPATIBLE),
54 0x86, 0x80, 0xba, 0x14, 0x99, 0x80, 0x00, 0xa0, 0x40, 0x08,
55 0x23, 0x50, 0x0d, 0x95, 0x00, 0x00
56 },
57 {
58 0,
59 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
60 }
61};
62
63/*
64 * Bytes 6,8,9,11 change for NAND boot
65 */
66static u8 nand_boot[] = {
67 0xd0, 0xa0, 0x68, 0x58
68};
69
70static int do_bootstrap(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
71{
72 u8 *buf, b_nand;
73 int x, y, nbytes, selcfg;
74 extern char console_buffer[];
75
76 if (argc < 2) {
77 printf("Usage:\n%s\n", cmdtp->usage);
78 return 1;
79 }
80
81 if ((strcmp(argv[1], "nor") != 0) &&
82 (strcmp(argv[1], "nand") != 0)) {
83 printf("Unsupported boot-device - only nor|nand support\n");
84 return 1;
85 }
86
87 /* set the nand flag based on provided input */
88 if ((strcmp(argv[1], "nand") == 0))
89 b_nand = 1;
90 else
91 b_nand = 0;
92
93 printf("Available configurations: \n\n");
94
95 if (b_nand) {
96 for(x = 0, y = 0; boot_configs[x][0] != 0; x++) {
97 /* filter on nand compatible */
98 if (boot_configs[x][0] & NAND_COMPATIBLE) {
99 printf(" %d - %s\n", (y+1), config_labels[x]);
100 y++;
101 }
102 }
103 } else {
104 for(x = 0, y = 0; boot_configs[x][0] != 0; x++) {
105 /* filter on nor compatible */
106 if (boot_configs[x][0] & NOR_COMPATIBLE) {
107 printf(" %d - %s\n", (y+1), config_labels[x]);
108 y++;
109 }
110 }
111 }
112
113 do {
114 nbytes = readline(" Selection [1-x / quit]: ");
115
116 if (nbytes) {
117 if (strcmp(console_buffer, "quit") == 0)
118 return 0;
119 selcfg = simple_strtol(console_buffer, NULL, 10);
120 if ((selcfg < 1) || (selcfg > y))
121 nbytes = 0;
122 }
123 } while (nbytes == 0);
124
125
126 y = (selcfg - 1);
127
128 for (x = 0; boot_configs[x][0] != 0; x++) {
129 if (b_nand) {
130 if (boot_configs[x][0] & NAND_COMPATIBLE) {
131 if (y > 0)
132 y--;
133 else if (y < 1)
134 break;
135 }
136 } else {
137 if (boot_configs[x][0] & NOR_COMPATIBLE) {
138 if (y > 0)
139 y--;
140 else if (y < 1)
141 break;
142 }
143 }
144 }
145
146 buf = &boot_configs[x][1];
147
148 if (b_nand) {
149 buf[6] = nand_boot[0];
150 buf[8] = nand_boot[1];
151 buf[9] = nand_boot[2];
152 buf[11] = nand_boot[3];
153 }
154
155 if (i2c_write(I2C_EEPROM_ADDR, 0, 1, buf, 16) != 0)
156 printf("Error writing to EEPROM at address 0x%x\n", I2C_EEPROM_ADDR);
157 udelay(CFG_EEPROM_PAGE_WRITE_DELAY_MS * 1000);
158
159 printf("Done\n");
160 printf("Please power-cycle the board for the changes to take effect\n");
161
162 return 0;
163}
164
165U_BOOT_CMD(
166 bootstrap, 2, 0, do_bootstrap,
167 "bootstrap - program the I2C bootstrap EEPROM\n",
168 "<nand|nor> - strap to boot from NAND or NOR flash\n"
169 );