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/*
* (C) Copyright 2013 Teresa Gámez, Phytec Messtechnik GmbH
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*/
#include <common.h>
#include <bootsource.h>
#include <envfs.h>
#include <bootm.h>
#include <init.h>
#include <io.h>
#include <fs.h>
#include <malloc.h>
#include <libfile.h>
#include <linux/stat.h>
#include <mach/omap/gpmc.h>
#include <mach/omap/generic.h>
#include <mach/omap/am33xx-silicon.h>
#include <mach/omap/omap3-silicon.h>
#include <mach/omap/omap4-silicon.h>
#include <mach/omap/am33xx-generic.h>
#include <mach/omap/omap3-generic.h>
#include <mach/omap/omap4-generic.h>
void __iomem *omap_gpmc_base;
unsigned int __omap_cpu_type;
static void *omap_sram_start(void)
{
if (cpu_is_am33xx())
return (void *)AM33XX_SRAM0_START;
if (cpu_is_omap3())
return (void *)OMAP3_SRAM_BASE;
if (cpu_is_omap4())
return (void *)OMAP44XX_SRAM_BASE;
return NULL;
}
static void *omap_scratch_space_start(void)
{
if (cpu_is_am33xx())
return (void *)AM33XX_SRAM_SCRATCH_SPACE;
if (cpu_is_omap3())
return (void *)OMAP3_SRAM_SCRATCH_SPACE;
if (cpu_is_omap4())
return (void *)OMAP44XX_SRAM_SCRATCH_SPACE;
return NULL;
}
void __noreturn omap_start_barebox(void *barebox)
{
int (*func)(void *) = barebox;
void *sramadr = omap_sram_start();
void *scratch = omap_scratch_space_start();
memcpy(sramadr, scratch, sizeof(uint32_t) * 3);
shutdown_barebox();
func(sramadr);
hang();
}
#define OMAP_WDT_WWPS 0x34
#define OMAP_WDT_WSPR 0x48
#define WDT_DISABLE_CODE1 0xaaaa
#define WDT_DISABLE_CODE2 0x5555
void omap_watchdog_disable(const void __iomem *wdt)
{
/* WDT is already running when the bootloader gets control
* Disable it to avoid "random" resets
*/
__raw_writel(WDT_DISABLE_CODE1, wdt + OMAP_WDT_WSPR);
do {
} while (__raw_readl(wdt + OMAP_WDT_WWPS));
__raw_writel(WDT_DISABLE_CODE2, wdt + OMAP_WDT_WSPR);
}
#ifdef CONFIG_BOOTM
static int do_bootm_omap_barebox(struct image_data *data)
{
void (*barebox)(uint32_t);
barebox = read_file(data->os_file, NULL);
if (!barebox)
return -EINVAL;
if (data->dryrun) {
free(barebox);
return 0;
}
omap_start_barebox(barebox);
}
static struct image_handler omap_barebox_handler = {
.name = "OMAP barebox",
.bootm = do_bootm_omap_barebox,
.filetype = filetype_arm_barebox,
};
static int omap_bootm_barebox(void)
{
if (!cpu_is_omap())
return 0;
return register_image_handler(&omap_barebox_handler);
}
device_initcall(omap_bootm_barebox);
#endif
const static char *omap_bootmmc_dev;
void omap_set_bootmmc_devname(const char *devname)
{
omap_bootmmc_dev = devname;
}
const char *omap_get_bootmmc_devname(void)
{
return omap_bootmmc_dev;
}
#if defined(CONFIG_ENV_HANDLING)
static char *envpath = "/mnt/mmc0.0/barebox.env";
static int omap_env_init(void)
{
int ret;
const char *diskdev;
char *partname;
struct cdev *cdev;
const char *rootpath;
if (!cpu_is_omap())
return 0;
if (bootsource_get() != BOOTSOURCE_MMC)
return 0;
if (omap_bootmmc_dev)
diskdev = omap_bootmmc_dev;
else
diskdev = "disk0";
device_detect_by_name(diskdev);
partname = basprintf("%s.0", diskdev);
cdev = cdev_by_name(partname);
if (cdev == NULL) {
pr_err("Failed to get device %s\n", partname);
goto out;
}
rootpath = cdev_mount_default(cdev, NULL);
if (IS_ERR(rootpath)) {
pr_err("Failed to load environment: mount %s failed (%ld)\n",
cdev->name, PTR_ERR(rootpath));
goto out;
}
ret = symlink(rootpath, "/boot");
if (ret < 0)
pr_warn("Failed to create symlink from %s to %s\n", rootpath
, "/boot");
envpath = basprintf("%s/barebox.env", rootpath);
pr_debug("Loading default env from %s on device %s\n", envpath,
partname);
default_environment_path_set(envpath);
free(envpath);
out:
free(partname);
return 0;
}
late_initcall(omap_env_init);
#endif
static int omap_soc_from_dt(void)
{
if (of_machine_is_compatible("ti,am33xx"))
return OMAP_CPU_AM33XX;
if (of_machine_is_compatible("ti,omap4"))
return OMAP_CPU_OMAP4;
if (of_machine_is_compatible("ti,omap3"))
return OMAP_CPU_OMAP3;
return 0;
}
static int omap_init(void)
{
int ret;
struct device_node *root;
root = of_get_root_node();
if (root) {
__omap_cpu_type = omap_soc_from_dt();
if (!__omap_cpu_type)
return 0;
}
if (cpu_is_omap3())
ret = omap3_init();
else if (cpu_is_omap4())
ret = omap4_init();
else if (cpu_is_am33xx())
ret = am33xx_init();
else
return -EINVAL;
if (root)
return ret;
if (cpu_is_omap3())
ret = omap3_devices_init();
else if (cpu_is_omap4())
ret = omap4_devices_init();
else if (cpu_is_am33xx())
ret = am33xx_devices_init();
else
return -EINVAL;
return ret;
}
postcore_initcall(omap_init);
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