92 lines
2.2 KiB
C
92 lines
2.2 KiB
C
|
/*
|
||
|
|
* chromeos_pstore.c - Driver to instantiate Chromebook ramoops device
|
||
|
|
*
|
||
|
|
* Copyright (C) 2013 Google, Inc.
|
||
|
|
*
|
||
|
|
* 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, version 2 of the License.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <linux/dmi.h>
|
||
|
|
#include <linux/module.h>
|
||
|
|
#include <linux/platform_device.h>
|
||
|
|
#include <linux/pstore_ram.h>
|
||
|
|
|
||
|
|
static struct dmi_system_id chromeos_pstore_dmi_table[] __initdata = {
|
||
|
|
{
|
||
|
|
/*
|
||
|
|
* Today all Chromebooks/boxes ship with Google_* as version and
|
||
|
|
* coreboot as bios vendor. No other systems with this
|
||
|
|
* combination are known to date.
|
||
|
|
*/
|
||
|
|
.matches = {
|
||
|
|
DMI_MATCH(DMI_BIOS_VENDOR, "coreboot"),
|
||
|
|
DMI_MATCH(DMI_BIOS_VERSION, "Google_"),
|
||
|
|
},
|
||
|
|
},
|
||
|
|
{
|
||
|
|
/* x86-alex, the first Samsung Chromebook. */
|
||
|
|
.matches = {
|
||
|
|
DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
|
||
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "Alex"),
|
||
|
|
},
|
||
|
|
},
|
||
|
|
{
|
||
|
|
/* x86-mario, the Cr-48 pilot device from Google. */
|
||
|
|
.matches = {
|
||
|
|
DMI_MATCH(DMI_SYS_VENDOR, "IEC"),
|
||
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "Mario"),
|
||
|
|
},
|
||
|
|
},
|
||
|
|
{
|
||
|
|
/* x86-zgb, the first Acer Chromebook. */
|
||
|
|
.matches = {
|
||
|
|
DMI_MATCH(DMI_SYS_VENDOR, "ACER"),
|
||
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "ZGB"),
|
||
|
|
},
|
||
|
|
},
|
||
|
|
{ }
|
||
|
|
};
|
||
|
|
MODULE_DEVICE_TABLE(dmi, chromeos_pstore_dmi_table);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* On x86 chromebooks/boxes, the firmware will keep the legacy VGA memory
|
||
|
|
* range untouched across reboots, so we use that to store our pstore
|
||
|
|
* contents for panic logs, etc.
|
||
|
|
*/
|
||
|
|
static struct ramoops_platform_data chromeos_ramoops_data = {
|
||
|
|
.mem_size = 0x100000,
|
||
|
|
.mem_address = 0xf00000,
|
||
|
|
.record_size = 0x20000,
|
||
|
|
.console_size = 0x20000,
|
||
|
|
.ftrace_size = 0x20000,
|
||
|
|
.dump_oops = 1,
|
||
|
|
};
|
||
|
|
|
||
|
|
static struct platform_device chromeos_ramoops = {
|
||
|
|
.name = "ramoops",
|
||
|
|
.dev = {
|
||
|
|
.platform_data = &chromeos_ramoops_data,
|
||
|
|
},
|
||
|
|
};
|
||
|
|
|
||
|
|
static int __init chromeos_pstore_init(void)
|
||
|
|
{
|
||
|
|
if (dmi_check_system(chromeos_pstore_dmi_table))
|
||
|
|
return platform_device_register(&chromeos_ramoops);
|
||
|
|
|
||
|
|
return -ENODEV;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void __exit chromeos_pstore_exit(void)
|
||
|
|
{
|
||
|
|
platform_device_unregister(&chromeos_ramoops);
|
||
|
|
}
|
||
|
|
|
||
|
|
module_init(chromeos_pstore_init);
|
||
|
|
module_exit(chromeos_pstore_exit);
|
||
|
|
|
||
|
|
MODULE_DESCRIPTION("Chrome OS pstore module");
|
||
|
|
MODULE_LICENSE("GPL");
|