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/*
* PS3 flash memory os area.
*
* Copyright (C) 2006 Sony Computer Entertainment Inc.
* Copyright 2006 Sony Corp.
*
* 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.
*
* 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/kernel.h>
#include <linux/io.h>
#include <linux/workqueue.h>
#include <linux/fs.h>
#include <linux/syscalls.h>
#include <linux/ctype.h>
#include <asm/lmb.h>
#include "platform.h"
enum {
OS_AREA_SEGMENT_SIZE = 0X200,
};
enum os_area_ldr_format {
HEADER_LDR_FORMAT_RAW = 0,
HEADER_LDR_FORMAT_GZIP = 1,
};
#define OS_AREA_HEADER_MAGIC_NUM "cell_ext_os_area"
/**
* struct os_area_header - os area header segment.
* @magic_num: Always 'cell_ext_os_area'.
* @hdr_version: Header format version number.
* @db_area_offset: Starting segment number of other os database area.
* @ldr_area_offset: Starting segment number of bootloader image area.
* @ldr_format: HEADER_LDR_FORMAT flag.
* @ldr_size: Size of bootloader image in bytes.
*
* Note that the docs refer to area offsets. These are offsets in units of
* segments from the start of the os area (top of the header). These are
* better thought of as segment numbers. The os area of the os area is
* reserved for the os image.
*/
struct os_area_header {
u8 magic_num[16];
u32 hdr_version;
u32 db_area_offset;
u32 ldr_area_offset;
u32 _reserved_1;
u32 ldr_format;
u32 ldr_size;
u32 _reserved_2[6];
};
enum os_area_boot_flag {
PARAM_BOOT_FLAG_GAME_OS = 0,
PARAM_BOOT_FLAG_OTHER_OS = 1,
};
enum os_area_ctrl_button {
PARAM_CTRL_BUTTON_O_IS_YES = 0,
PARAM_CTRL_BUTTON_X_IS_YES = 1,
};
/**
* struct os_area_params - os area params segment.
* @boot_flag: User preference of operating system, PARAM_BOOT_FLAG flag.
* @num_params: Number of params in this (params) segment.
* @rtc_diff: Difference in seconds between 1970 and the ps3 rtc value.
* @av_multi_out: User preference of AV output, PARAM_AV_MULTI_OUT flag.
* @ctrl_button: User preference of controller button config, PARAM_CTRL_BUTTON
* flag.
* @static_ip_addr: User preference of static IP address.
* @network_mask: User preference of static network mask.
* @default_gateway: User preference of static default gateway.
* @dns_primary: User preference of static primary dns server.
* @dns_secondary: User preference of static secondary dns server.
*
* The ps3 rtc maintains a read-only value that approximates seconds since
* 2000-01-01 00:00:00 UTC.
*
* User preference of zero for static_ip_addr means use dhcp.
*/
struct os_area_params {
u32 boot_flag;
u32 _reserved_1[3];
u32 num_params;
u32 _reserved_2[3];
/* param 0 */
s64 rtc_diff;
u8 av_multi_out;
u8 ctrl_button;
u8 _reserved_3[6];
/* param 1 */
u8 static_ip_addr[4];
u8 network_mask[4];
u8 default_gateway[4];
u8 _reserved_4[4];
/* param 2 */
u8 dns_primary[4];
u8 dns_secondary[4];
u8 _reserved_5[8];
};
#define OS_AREA_DB_MAGIC_NUM "-db-"
/**
* struct os_area_db - Shared flash memory database.
* @magic_num: Always '-db-'.
* @version: os_area_db format version number.
* @index_64: byte offset of the database id index for 64 bit variables.
* @count_64: number of usable 64 bit index entries
* @index_32: byte offset of the database id index for 32 bit variables.
* @count_32: number of usable 32 bit index entries
* @index_16: byte offset of the database id index for 16 bit variables.
* @count_16: number of usable 16 bit index entries
*
* Flash rom storage for exclusive use by guests running in the other os lpar.
* The current system configuration allocates 1K (two segments) for other os
* use.
*/
struct os_area_db {
u8 magic_num[4];
u16 version;
u16 _reserved_1;
u16 index_64;
u16 count_64;
u16 index_32;
u16 count_32;
u16 index_16;
u16 count_16;
u32 _reserved_2;
u8 _db_data[1000];
};
/**
* enum os_area_db_owner - Data owners.
*/
enum os_area_db_owner {
OS_AREA_DB_OWNER_ANY = -1,
OS_AREA_DB_OWNER_NONE = 0,
OS_AREA_DB_OWNER_PROTOTYPE = 1,
OS_AREA_DB_OWNER_LINUX = 2,
OS_AREA_DB_OWNER_PETITBOOT = 3,
OS_AREA_DB_OWNER_MAX = 32,
};
enum os_area_db_key {
OS_AREA_DB_KEY_ANY = -1,
OS_AREA_DB_KEY_NONE = 0,
OS_AREA_DB_KEY_RTC_DIFF = 1,
OS_AREA_DB_KEY_VIDEO_MODE = 2,
OS_AREA_DB_KEY_MAX = 8,
};
struct os_area_db_id {
int owner;
int key;
};
static const struct os_area_db_id os_area_db_id_empty = {
.owner = OS_AREA_DB_OWNER_NONE,
.key = OS_AREA_DB_KEY_NONE
};
static const struct os_area_db_id os_area_db_id_any = {
.owner = OS_AREA_DB_OWNER_ANY,
.key = OS_AREA_DB_KEY_ANY
};
static const struct os_area_db_id os_area_db_id_rtc_diff = {
.owner = OS_AREA_DB_OWNER_LINUX,
.key = OS_AREA_DB_KEY_RTC_DIFF
};
static const struct os_area_db_id os_area_db_id_video_mode = {
.owner = OS_AREA_DB_OWNER_LINUX,
.key = OS_AREA_DB_KEY_VIDEO_MODE
};
#define SECONDS_FROM_1970_TO_2000 946684800LL
/**
* struct saved_params - Static working copies of data from the PS3 'os area'.
*
* The order of preference we use for the rtc_diff source:
* 1) The database value.
* 2) The game os value.
* 3) The number of seconds from 1970 to 2000.
*/
struct saved_params {
unsigned int valid;
s64 rtc_diff;
unsigned int av_multi_out;
} static saved_params;
static struct property property_rtc_diff = {
.name = "linux,rtc_diff",
.length = sizeof(saved_params.rtc_diff),
.value = &saved_params.rtc_diff,
};
static struct property property_av_multi_out = {
.name = "linux,av_multi_out",
.length = sizeof(saved_params.av_multi_out),
.value = &saved_params.av_multi_out,
};
/**
* os_area_set_property - Add or overwrite a saved_params value to the device tree.
*
* Overwrites an existing property.
*/
static void os_area_set_property(struct device_node *node,
struct property *prop)
{
int result;
struct property *tmp = of_find_property(node, prop->name, NULL);
if (tmp) {
pr_debug("%s:%d found %s\n", __func__, __LINE__, prop->name);
prom_remove_property(node, tmp);
}
result = prom_add_property(node, prop);
if (result)
pr_debug("%s:%d prom_set_property failed\n", __func__,
__LINE__);
}
/**
* os_area_get_property - Get a saved_params value from the device tree.
*
*/
static void __init os_area_get_property(struct device_node *node,
struct property *prop)
{
const struct property *tmp = of_find_property(node, prop->name, NULL);
if (tmp) {
BUG_ON(
|