3 * Robert Schwebel, Pengutronix, r.schwebel@pengutronix.de
4 * Kyle Harris, Nexus Technologies, Inc., kharris@nexus-tech.net
5 * Marius Groeger, Sysgo Real-Time Solutions GmbH, mgroeger@sysgo.de
7 * See file CREDITS for list of people who contributed to this
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License as
12 * published by the Free Software Foundation; either version 2 of
13 * the License, or (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
27 #include <asm/arch/pxa-regs.h>
28 #include <asm/mach-types.h>
30 #ifdef CONFIG_SHOW_BOOT_PROGRESS
31 # define SHOW_BOOT_PROGRESS(arg) show_boot_progress(arg)
33 # define SHOW_BOOT_PROGRESS(arg)
37 * i2c_init_board - reset i2c bus. When the board is powercycled during a
38 * bus transfer it might hang; for details see doc/I2C_Edge_Conditions.
39 * The Innokom board has GPIO70 connected to SCLK which can be toggled
40 * until all chips think that their current cycles are finished.
42 int i2c_init_board(void)
46 /* disable I2C controller first, otherwhise it thinks we want to */
47 /* talk to the slave port... */
48 icr = ICR; ICR &= ~(ICR_SCLE | ICR_IUE);
50 /* set gpio pin low _before_ we change direction to output */
51 GPCR(70) = GPIO_bit(70);
53 /* now toggle between output=low and high-impedance */
54 for (i = 0; i < 20; i++) {
55 GPDR(70) |= GPIO_bit(70); /* output */
57 GPDR(70) &= ~GPIO_bit(70); /* input */
68 * misc_init_r: - misc initialisation routines
75 /* determine if the software update key is pressed during startup */
76 if (GPLR0 & 0x00000800) {
77 printf("using bootcmd_normal (sw-update button not pressed)\n");
78 str = getenv("bootcmd_normal");
80 printf("using bootcmd_update (sw-update button pressed)\n");
81 str = getenv("bootcmd_update");
84 setenv("bootcmd",str);
91 * board_init: - setup some data structures
93 * @return: 0 in case of success
98 DECLARE_GLOBAL_DATA_PTR;
100 /* memory and cpu-speed are setup before relocation */
101 /* so we do _nothing_ here */
103 gd->bd->bi_arch_number = MACH_TYPE_INNOKOM;
104 gd->bd->bi_boot_params = 0xa0000100;
105 gd->bd->bi_baudrate = CONFIG_BAUDRATE;
112 * dram_init: - setup dynamic RAM
114 * @return: 0 in case of success
119 DECLARE_GLOBAL_DATA_PTR;
121 gd->bd->bi_dram[0].start = PHYS_SDRAM_1;
122 gd->bd->bi_dram[0].size = PHYS_SDRAM_1_SIZE;
129 * innokom_set_led: - switch LEDs on or off
131 * @param led: LED to switch (0,1,2)
132 * @param state: switch on (1) or off (0)
135 void innokom_set_led(int led, int state)
139 case 0: if (state==1) {
140 GPCR0 |= CSB226_USER_LED0;
141 } else if (state==0) {
142 GPSR0 |= CSB226_USER_LED0;
146 case 1: if (state==1) {
147 GPCR0 |= CSB226_USER_LED1;
148 } else if (state==0) {
149 GPSR0 |= CSB226_USER_LED1;
153 case 2: if (state==1) {
154 GPCR0 |= CSB226_USER_LED2;
155 } else if (state==0) {
156 GPSR0 |= CSB226_USER_LED2;
167 * show_boot_progress: - indicate state of the boot process
169 * @param status: Status number - see README for details.
171 * The CSB226 does only have 3 LEDs, so we switch them on at the most
172 * important states (1, 5, 15).
175 void show_boot_progress (int status)
179 case 1: csb226_set_led(0,1); break;
180 case 5: csb226_set_led(1,1); break;
181 case 15: csb226_set_led(2,1); break;