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/*
* Copyright (C) 2009 Motorola, Inc.
* Copyright (C) 2012 - 2014 Motorola Mobility. All rights reserved.
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include <linux/module.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/of.h>
#include <asm/bootinfo.h>
#include <linux/pstore.h>
#define EMIT_BOOTINFO_LASTKMSG(buf, strname, fmt, name) \
do { \
snprintf(buf, sizeof(buf), strname ": " fmt "\n", \
bi_##name()); \
pstore_annotate(buf); \
} while (0)
/*
* powerup_reason contains the powerup reason provided by the ATAGs when
* the machine boots.
*
* Exported symbols:
* bi_powerup_reason() -- returns the powerup reason
*/
#ifdef CONFIG_OF
static void of_powerup(u32 *pwr)
{
struct device_node *n = of_find_node_by_path("/chosen");
of_property_read_u32(n, "mmi,powerup_reason", pwr);
of_node_put(n);
}
#else
static inline void of_powerup(u32 *pwr) { }
#endif
u32 bi_powerup_reason(void)
{
u32 reason = PU_REASON_INVALID;
of_powerup(&reason);
return reason;
}
EXPORT_SYMBOL(bi_powerup_reason);
/*
* mbm_version contains the MBM version.
* mbm_loader_version contains the MBM loader version.
* mbm_version and mbm_loader_version default to 0 if they are
* not set.
*
* Exported symbols:
* bi_mbm_version() -- returns the MBM version
*/
#ifdef CONFIG_OF
static void __init of_mbmver(u32 *ver)
{
struct device_node *n = of_find_node_by_path("/chosen");
of_property_read_u32(n, "mmi,mbmversion", ver);
of_node_put(n);
}
#else
static inline void of_mbmver(u32 *ver) { }
#endif
u32 bi_mbm_version(void)
{
u32 version = 0xFFFFFFFF;
of_mbmver(&version);
return version;
}
EXPORT_SYMBOL(bi_mbm_version);
#ifdef CONFIG_OF
static void __init of_hwrev(u32 *revision)
{
struct device_node *n = of_find_node_by_path("/chosen");
of_property_read_u32(n, "linux,hwrev", revision);
of_node_put(n);
}
#else
static inline void of_hwrev(u32 *ver) { }
#endif
static u32 bi_hwrev(void)
{
u32 rev = 0xFFFFFFFF;
of_hwrev(&rev);
return rev;
}
#ifdef CONFIG_OF
static void __init of_serial(u32 *serial_h, u32 *serial_l)
{
struct device_node *n = of_find_node_by_path("/chosen");
of_property_read_u32(n, "linux,seriallow", serial_l);
of_property_read_u32(n, "linux,serialhigh", serial_h);
of_node_put(n);
}
#else
static inline void of_serial(u32 *serial_h, u32 *serial_l) { }
#endif
static u64 bi_serial(void)
{
u32 serial_high = 0xFFFFFFFF;
u32 serial_low = 0xFFFFFFFF;
of_serial(&serial_high, &serial_low);
return ((u64)serial_high << 32) | (u64)serial_low;
}
#define BOOTREASON_MAX_LEN 64
static char bootreason[BOOTREASON_MAX_LEN + 1];
int __init board_bootreason_init(char *s)
{
strncpy(bootreason, s, BOOTREASON_MAX_LEN);
bootreason[BOOTREASON_MAX_LEN] = '\0';
return 1;
}
__setup("androidboot.bootreason=", board_bootreason_init);
const char *bi_bootreason(void)
{
return bootreason;
}
EXPORT_SYMBOL(bi_bootreason);
static void bootinfo_annotate_lastkmsg(void)
{
char buf[BOOTREASON_MAX_LEN];
pstore_annotate("Boot info:\n");
EMIT_BOOTINFO_LASTKMSG(buf, "Last boot reason", "%s", bootreason);
}
/* get_bootinfo fills in the /proc/bootinfo information.
* We currently only have the powerup reason, mbm_version, serial
* and hwrevision.
*/
static int get_bootinfo(struct seq_file *m, void *v)
{
seq_printf(m, "SERIAL : 0x%llx\n", bi_serial());
seq_printf(m, "HW_REV : 0x%04x\n", bi_hwrev());
seq_printf(m, "POWERUPREASON : 0x%08x\n", bi_powerup_reason());
seq_printf(m, "MBM_VERSION : 0x%08x\n", bi_mbm_version());
seq_printf(m, "Last boot reason : %s \n", bootreason);
return 0;
}
static int bootinfo_open(struct inode *inode, struct file *file)
{
return single_open(file, get_bootinfo, NULL);
}
static const struct file_operations bootinfo_fops = {
.owner = THIS_MODULE,
.open = bootinfo_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
static struct proc_dir_entry *proc_bootinfo;
static int __init bootinfo_init_module(void)
{
proc_bootinfo = &proc_root;
proc_create("bootinfo", 0, NULL, &bootinfo_fops);
bootinfo_annotate_lastkmsg();
return 0;
}
void __exit bootinfo_cleanup_module(void)
{
if (proc_bootinfo) {
remove_proc_entry("bootinfo", proc_bootinfo);
proc_bootinfo = NULL;
}
}
module_init(bootinfo_init_module);
module_exit(bootinfo_cleanup_module);
MODULE_AUTHOR("MOTOROLA");
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