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u-boot/board/zeus/zeus.c

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/*
* (C) Copyright 2007
* Stefan Roese, DENX Software Engineering, sr@denx.de.
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <command.h>
#include <malloc.h>
#include <environment.h>
#include <logbuff.h>
#include <post.h>
#include <asm/processor.h>
#include <asm/io.h>
#include <asm/ppc4xx-gpio.h>
DECLARE_GLOBAL_DATA_PTR;
#define REBOOT_MAGIC 0x07081967
#define REBOOT_NOP 0x00000000
#define REBOOT_DO_POST 0x00000001
extern flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */
ulong flash_get_size(ulong base, int banknum);
void env_crc_update(void);
static u32 start_time;
int board_early_init_f(void)
{
mtdcr(UIC0SR, 0xFFFFFFFF); /* clear all ints */
mtdcr(UIC0ER, 0x00000000); /* disable all ints */
mtdcr(UIC0CR, 0x00000000);
mtdcr(UIC0PR, 0xFFFF7F00); /* set int polarities */
mtdcr(UIC0TR, 0x00000000); /* set int trigger levels */
mtdcr(UIC0SR, 0xFFFFFFFF); /* clear all ints */
mtdcr(UIC0VCR, 0x00000001); /* set vect base=0,INT0 highest priority */
/*
* Configure CPC0_PCI to enable PerWE as output
*/
mtdcr(CPC0_PCI, CPC0_PCI_SPE);
return 0;
}
int misc_init_r(void)
{
u32 pbcr;
int size_val = 0;
u32 post_magic;
u32 post_val;
post_magic = in_be32((void *)CONFIG_SYS_POST_MAGIC);
post_val = in_be32((void *)CONFIG_SYS_POST_VAL);
if ((post_magic == REBOOT_MAGIC) && (post_val == REBOOT_DO_POST)) {
/*
* Set special bootline bootparameter to pass this POST boot
* mode to Linux to reset the username/password
*/
setenv("addmisc", "setenv bootargs \\${bootargs} factory_reset=yes");
/*
* Normally don't run POST tests, only when enabled
* via the sw-reset button. So disable further tests
* upon next bootup here.
*/
out_be32((void *)CONFIG_SYS_POST_VAL, REBOOT_NOP);
} else {
/*
* Only run POST when initiated via the sw-reset button mechanism
*/
post_word_store(0);
}
/*
* Get current time
*/
start_time = get_timer(0);
/*
* FLASH stuff...
*/
/* Re-do sizing to get full correct info */
/* adjust flash start and offset */
mfebc(PB0CR, pbcr);
switch (gd->bd->bi_flashsize) {
case 1 << 20:
size_val = 0;
break;
case 2 << 20:
size_val = 1;
break;
case 4 << 20:
size_val = 2;
break;
case 8 << 20:
size_val = 3;
break;
case 16 << 20:
size_val = 4;
break;
case 32 << 20:
size_val = 5;
break;
case 64 << 20:
size_val = 6;
break;
case 128 << 20:
size_val = 7;
break;
}
pbcr = (pbcr & 0x0001ffff) | gd->bd->bi_flashstart | (size_val << 17);
mtebc(PB0CR, pbcr);
/*
* Re-check to get correct base address
*/
flash_get_size(gd->bd->bi_flashstart, 0);
/* Monitor protection ON by default */
(void)flash_protect(FLAG_PROTECT_SET,
-CONFIG_SYS_MONITOR_LEN,
0xffffffff,
&flash_info[0]);
/* Env protection ON by default */
(void)flash_protect(FLAG_PROTECT_SET,
CONFIG_ENV_ADDR_REDUND,
CONFIG_ENV_ADDR_REDUND + 2*CONFIG_ENV_SECT_SIZE - 1,
&flash_info[0]);
return 0;
}
/*
* Check Board Identity:
*/
int checkboard(void)
{
char buf[64];
int i = getenv_f("serial#", buf, sizeof(buf));
puts("Board: Zeus-");
if (in_be32((void *)GPIO0_IR) & GPIO_VAL(CONFIG_SYS_GPIO_ZEUS_PE))
puts("PE");
else
puts("CE");
puts(" of BulletEndPoint");
if (i > 0) {
puts(", serial# ");
puts(buf);
}
putc('\n');
/* both LED's off */
gpio_write_bit(CONFIG_SYS_GPIO_LED_RED, 0);
gpio_write_bit(CONFIG_SYS_GPIO_LED_GREEN, 0);
udelay(10000);
/* and on again */
gpio_write_bit(CONFIG_SYS_GPIO_LED_RED, 1);
gpio_write_bit(CONFIG_SYS_GPIO_LED_GREEN, 1);
return (0);
}
static int default_env_var(char *buf, char *var)
{
char *ptr;
char *val;
/*
* Find env variable
*/
ptr = strstr(buf + 4, var);
if (ptr == NULL) {
printf("ERROR: %s not found!\n", var);
return -1;
}
ptr += strlen(var) + 1;
/*
* Now the ethaddr needs to be updated in the "normal"
* environment storage -> redundant flash.
*/
val = ptr;
setenv(var, val);
printf("Updated %s from eeprom to %s!\n", var, val);
return 0;
}
static int restore_default(void)
{
char *buf;
char *buf_save;
u32 crc;
set_default_env("");
gd->env_valid = 1;
/*
* Read board specific values from I2C EEPROM
* and set env variables accordingly
* -> ethaddr, eth1addr, serial#
*/
buf = buf_save = malloc(FACTORY_RESET_ENV_SIZE);
if (buf == NULL) {
printf("ERROR: malloc() failed\n");
return -1;
}
if (eeprom_read(FACTORY_RESET_I2C_EEPROM, FACTORY_RESET_ENV_OFFS,
(u8 *)buf, FACTORY_RESET_ENV_SIZE)) {
puts("\nError reading EEPROM!\n");
} else {
crc = crc32(0, (u8 *)(buf + 4), FACTORY_RESET_ENV_SIZE - 4);
if (crc != *(u32 *)buf) {
printf("ERROR: crc mismatch %08x %08x\n", crc, *(u32 *)buf);
return -1;
}
default_env_var(buf, "ethaddr");
buf += 8 + 18;
default_env_var(buf, "eth1addr");
buf += 9 + 18;
default_env_var(buf, "serial#");
}
/*
* Finally save updated env variables back to flash
*/
saveenv();
free(buf_save);
return 0;
}
int do_set_default(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
char *buf;
char *buf_save;
char str[32];
u32 crc;
char var[32];
if (argc < 4) {
puts("ERROR!\n");
return -1;
}
buf = buf_save = malloc(FACTORY_RESET_ENV_SIZE);
memset(buf, 0, FACTORY_RESET_ENV_SIZE);
strcpy(var, "ethaddr");
printf("Setting %s to %s\n", var, argv[1]);
sprintf(str, "%s=%s", var, argv[1]);
strcpy(buf + 4, str);
buf += strlen(str) + 1;
strcpy(var, "eth1addr");
printf("Setting %s to %s\n", var, argv[2]);
sprintf(str, "%s=%s", var, argv[2]);
strcpy(buf + 4, str);
buf += strlen(str) + 1;
strcpy(var, "serial#");
printf("Setting %s to %s\n", var, argv[3]);
sprintf(str, "%s=%s", var, argv[3]);
strcpy(buf + 4, str);
crc = crc32(0, (u8 *)(buf_save + 4), FACTORY_RESET_ENV_SIZE - 4);
*(u32 *)buf_save = crc;
if (eeprom_write(FACTORY_RESET_I2C_EEPROM, FACTORY_RESET_ENV_OFFS,
(u8 *)buf_save, FACTORY_RESET_ENV_SIZE)) {
puts("\nError writing EEPROM!\n");
return -1;
}
free(buf_save);
return 0;
}
U_BOOT_CMD(
setdef, 4, 1, do_set_default,
"write board-specific values to EEPROM (ethaddr...)",
"ethaddr eth1addr serial#\n - write board-specific values to EEPROM"
);
static inline int sw_reset_pressed(void)
{
return !(in_be32((void *)GPIO0_IR) & GPIO_VAL(CONFIG_SYS_GPIO_SW_RESET));
}
int do_chkreset(cmd_tbl_t* cmdtp, int flag, int argc, char * const argv[])
{
int delta;
int count = 0;
int post = 0;
int factory_reset = 0;
if (!sw_reset_pressed()) {
printf("SW-Reset already high (Button released)\n");
printf("-> No action taken!\n");
return 0;
}
printf("Waiting for SW-Reset button to be released.");
while (1) {
delta = get_timer(start_time);
if (!sw_reset_pressed())
break;
if ((delta > CONFIG_SYS_TIME_POST) && !post) {
printf("\nWhen released now, POST tests will be started.");
gpio_write_bit(CONFIG_SYS_GPIO_LED_GREEN, 0);
post = 1;
}
if ((delta > CONFIG_SYS_TIME_FACTORY_RESET) && !factory_reset) {
printf("\nWhen released now, factory default values"
" will be restored.");
gpio_write_bit(CONFIG_SYS_GPIO_LED_RED, 0);
factory_reset = 1;
}
udelay(1000);
if (!(count++ % 1000))
printf(".");
}
printf("\nSW-Reset Button released after %d milli-seconds!\n", delta);
if (delta > CONFIG_SYS_TIME_FACTORY_RESET) {
printf("Starting factory reset value restoration...\n");
/*
* Restore default setting
*/
restore_default();
/*
* Reset the board for default to become valid
*/
do_reset(NULL, 0, 0, NULL);
return 0;
}
if (delta > CONFIG_SYS_TIME_POST) {
printf("Starting POST configuration...\n");
/*
* Enable POST upon next bootup
*/
out_be32((void *)CONFIG_SYS_POST_MAGIC, REBOOT_MAGIC);
out_be32((void *)CONFIG_SYS_POST_VAL, REBOOT_DO_POST);
post_bootmode_init();
/*
* Reset the logbuffer for a clean start
*/
logbuff_reset();
do_reset(NULL, 0, 0, NULL);
return 0;
}
return 0;
}
U_BOOT_CMD (
chkreset, 1, 1, do_chkreset,
"Check for status of SW-reset button and act accordingly",
""
);
#if defined(CONFIG_POST)
/*
* Returns 1 if keys pressed to start the power-on long-running tests
* Called from board_init_f().
*/
int post_hotkeys_pressed(void)
{
u32 post_magic;
u32 post_val;
post_magic = in_be32((void *)CONFIG_SYS_POST_MAGIC);
post_val = in_be32((void *)CONFIG_SYS_POST_VAL);
if ((post_magic == REBOOT_MAGIC) && (post_val == REBOOT_DO_POST))
return 1;
else
return 0;
}
#endif /* CONFIG_POST */
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