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/*
* arch/arm/mach-tegra/edp.c
*
* Copyright (C) 2011 NVIDIA, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* 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/init.h>
#include <linux/seq_file.h>
#include <linux/slab.h>
#include <mach/edp.h>
#include "fuse.h"
static const struct tegra_edp_limits *edp_limits;
static int edp_limits_size;
/*
* Temperature step size cannot be less than 4C because of hysteresis
* delta
* Code assumes different temperatures for the same speedo_id /
* regulator_cur are adjacent in the table, and higest regulator_cur
* comes first
*/
static char __initdata tegra_edp_map[] = {
0x00, 0x2f, 0x2d, 0x82, 0x78, 0x78, 0x78, 0x00,
0x2f, 0x3c, 0x82, 0x78, 0x78, 0x78, 0x00, 0x2f,
0x4b, 0x82, 0x78, 0x78, 0x78, 0x00, 0x2f, 0x55,
0x82, 0x78, 0x78, 0x78, 0x00, 0x28, 0x2d, 0x82,
0x78, 0x78, 0x78, 0x00, 0x28, 0x3c, 0x82, 0x78,
0x78, 0x78, 0x00, 0x28, 0x4b, 0x82, 0x78, 0x78,
0x73, 0x00, 0x28, 0x55, 0x82, 0x78, 0x73, 0x69,
0x00, 0x23, 0x2d, 0x82, 0x78, 0x78, 0x78, 0x00,
0x23, 0x3c, 0x82, 0x78, 0x78, 0x6e, 0x00, 0x23,
0x4b, 0x82, 0x78, 0x78, 0x64, 0x00, 0x23, 0x55,
0x82, 0x78, 0x6e, 0x5a, 0x00, 0x1e, 0x2d, 0x82,
0x78, 0x78, 0x69, 0x00, 0x1e, 0x3c, 0x82, 0x78,
0x78, 0x64, 0x00, 0x1e, 0x4b, 0x82, 0x78, 0x6e,
0x5a, 0x00, 0x1e, 0x55, 0x82, 0x78, 0x64, 0x5a,
0x00, 0x19, 0x2d, 0x82, 0x78, 0x6e, 0x5a, 0x00,
0x19, 0x3c, 0x82, 0x78, 0x69, 0x55, 0x00, 0x19,
0x4b, 0x82, 0x78, 0x5f, 0x4b, 0x00, 0x19, 0x55,
0x82, 0x73, 0x5a, 0x3c, 0x01, 0x2f, 0x2d, 0x82,
0x78, 0x78, 0x78, 0x01, 0x2f, 0x3c, 0x82, 0x78,
0x78, 0x78, 0x01, 0x2f, 0x4b, 0x82, 0x78, 0x78,
0x78, 0x01, 0x2f, 0x55, 0x82, 0x78, 0x78, 0x78,
0x01, 0x28, 0x2d, 0x82, 0x78, 0x78, 0x78, 0x01,
0x28, 0x3c, 0x82, 0x78, 0x78, 0x78, 0x01, 0x28,
0x4b, 0x82, 0x78, 0x78, 0x73, 0x01, 0x28, 0x55,
0x82, 0x78, 0x73, 0x69, 0x01, 0x23, 0x2d, 0x82,
0x78, 0x78, 0x78, 0x01, 0x23, 0x3c, 0x82, 0x78,
0x78, 0x6e, 0x01, 0x23, 0x4b, 0x82, 0x78, 0x78,
0x64, 0x01, 0x23, 0x55, 0x82, 0x78, 0x6e, 0x5a,
0x01, 0x1e, 0x2d, 0x82, 0x78, 0x78, 0x69, 0x01,
0x1e, 0x3c, 0x82, 0x78, 0x78, 0x64, 0x01, 0x1e,
0x4b, 0x82, 0x78, 0x6e, 0x5a, 0x01, 0x1e, 0x55,
0x82, 0x78, 0x64, 0x5a, 0x01, 0x19, 0x2d, 0x82,
0x78, 0x6e, 0x5a, 0x01, 0x19, 0x3c, 0x82, 0x78,
0x69, 0x55, 0x01, 0x19, 0x4b, 0x82, 0x78, 0x5f,
0x4b, 0x01, 0x19, 0x55, 0x82, 0x73, 0x5a, 0x3c,
0x02, 0x3d, 0x2d, 0x8c, 0x82, 0x82, 0x82, 0x02,
0x3d, 0x3c, 0x8c, 0x82, 0x82, 0x82, 0x02, 0x3d,
0x4b, 0x8c, 0x82, 0x82, 0x82, 0x02, 0x3d, 0x55,
0x8c, 0x82, 0x82, 0x82, 0x02, 0x32, 0x2d, 0x8c,
0x82, 0x82, 0x82, 0x02, 0x32, 0x3c, 0x8c, 0x82,
0x82, 0x82, 0x02, 0x32, 0x4b, 0x8c, 0x82, 0x82,
0x78, 0x02, 0x32, 0x55, 0x8c, 0x82, 0x82, 0x6e,
0x02, 0x28, 0x2d, 0x8c, 0x82, 0x82, 0x78, 0x02,
0x28, 0x3c, 0x8c, 0x82, 0x82, 0x73, 0x02, 0x28,
0x4b, 0x8c, 0x82, 0x78, 0x6e, 0x02, 0x28, 0x55,
0x8c, 0x82, 0x73, 0x5f, 0x02, 0x23, 0x2d, 0x8c,
0x82, 0x82, 0x6e, 0x02, 0x23, 0x3c, 0x8c, 0x82,
0x78, 0x69, 0x02, 0x23, 0x4b, 0x8c, 0x82, 0x73,
0x5f, 0x02, 0x23, 0x55, 0x8c, 0x82, 0x69, 0x55,
0x03, 0x3d, 0x2d, 0x8c, 0x82, 0x82, 0x82, 0x03,
0x3d, 0x3c, 0x8c, 0x82, 0x82, 0x82, 0x03, 0x3d,
0x4b, 0x8c, 0x82, 0x82, 0x82, 0x03, 0x3d, 0x55,
0x8c, 0x82, 0x82, 0x82, 0x03, 0x32, 0x2d, 0x8c,
0x82, 0x82, 0x82, 0x03, 0x32, 0x3c, 0x8c, 0x82,
0x82, 0x82, 0x03, 0x32, 0x4b, 0x8c, 0x82, 0x82,
0x73, 0x03, 0x32, 0x55, 0x8c, 0x82, 0x82, 0x6e,
0x03, 0x28, 0x2d, 0x8c, 0x82, 0x82, 0x78, 0x03,
0x28, 0x3c, 0x8c, 0x82, 0x82, 0x73, 0x03, 0x28,
0x4b, 0x8c, 0x82, 0x7d, 0x6e, 0x03, 0x28, 0x55,
0x8c, 0x82, 0x73, 0x5f, 0x03, 0x23, 0x2d, 0x8c,
0x82, 0x82, 0x6e, 0x03, 0x23, 0x3c, 0x8c, 0x82,
0x78, 0x6e, 0x03, 0x23, 0x4b, 0x8c, 0x82, 0x78,
0x5f, 0x03, 0x23, 0x55, 0x8c, 0x82, 0x6e, 0x5a,
};
/*
* "Safe entry" to be used when no match for speedo_id /
* regulator_cur is found; must be the last one
*/
static struct tegra_edp_limits edp_default_limits[] = {
{85, {1000000, 1000000, 1000000, 1000000} },
};
/*
* Specify regulator current in mA, e.g. 5000mA
* Use 0 for default
*/
void __init tegra_init_cpu_edp_limits(unsigned int regulator_mA)
{
int cpu_speedo_id = tegra_cpu_speedo_id();
int i, j;
struct tegra_edp_limits *e;
struct tegra_edp_entry *t = (struct tegra_edp_entry *)tegra_edp_map;
int tsize = sizeof(tegra_edp_map)/sizeof(struct tegra_edp_entry);
if (!regulator_mA) {
edp_limits = edp_default_limits;
edp_limits_size = ARRAY_SIZE(edp_default_limits);
return;
}
for (i = 0; i < tsize; i++) {
if (t[i].speedo_id == cpu_speedo_id &&
t[i].regulator_100mA <= regulator_mA / 100)
break;
}
/* No entry found in tegra_edp_map */
if (i >= tsize) {
edp_limits = edp_default_limits;
edp_limits_size = ARRAY_SIZE(edp_default_limits);
return;
}
/* Find all rows for this entry */
for (j = i + 1; j < tsize; j++) {
if (t[i].speedo_id != t[j].speedo_id ||
t[i].regulator_100mA != t[j].regulator_100mA)
break;
}
edp_limits_size = j - i;
e = kmalloc(sizeof(struct tegra_edp_limits) * edp_limits_size,
GFP_KERNEL);
BUG_ON(!e);
for (j = 0; j < edp_limits_size; j++) {
e[j].temperature = (int)t[i+j].temperature;
e[j].freq_limits[0] = (unsigned int)t[i+j].freq_limits[0] * 10000;
e[j].freq_limits[1] = (unsigned int)t[i+j].freq_limits[1] * 10000;
e[j].freq_limits[2] = (unsigned int)t[i+j].freq_limits[2] * 10000;
e[j].freq_limits[3] = (unsigned int)t[i+j].freq_limits[3] * 10000;
}
if (edp_limits && edp_limits != edp_default_limits)
kfree(edp_limits);
edp_limits = e;
}
void tegra_get_cpu_edp_limits(const struct tegra_edp_limits **limits, int *size)
{
*limits = edp_limits;
*size = edp_limits_size;
}
#ifdef CONFIG_DEBUG_FS
static int edp_limit_debugfs_show(struct seq_file *s, void *data)
{
seq_printf(s, "%u\n", tegra_get_edp_limit());
}
static int edp_debugfs_show(struct seq_file *s, void *data)
{
int i;
const struct tegra_edp_limits *limits;
int size;
tegra_get_cpu_edp_limits(&limits, &size);
seq_printf(s, "-- EDP table --\n");
for (i = 0; i < size; i++) {
seq_printf(s, "%4dC: %10d %10d %10d %10d\n",
limits[i].temperature,
limits[i].freq_limits[0],
limits[i].freq_limits[1],
limits[i].freq_limits[2],
limits[i].freq_limits[3]);
}
return 0;
}
static int edp_debugfs_open(struct inode *inode, struct file *file)
{
return single_open(file, edp_debugfs_show, inode->i_private);
}
static int edp_limit_debugfs_open(struct inode *inode, struct file *file)
{
return single_open(file, edp_limit_debugfs_show, inode->i_private);
}
static const struct file_operations edp_debugfs_fops = {
.open = edp_debugfs_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
static const struct file_operations edp_limit_debugfs_fops = {
.open = edp_limit_debugfs_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
static int __init tegra_edp_debugfs_init()
{
struct dentry *d;
d = debugfs_create_file("edp", S_IRUGO, NULL, NULL,
&edp_debugfs_fops);
if (!d)
return -ENOMEM;
d = debugfs_create_file("edp_limit", S_IRUGO, NULL, NULL,
&edp_limit_debugfs_fops);
return 0;
}
late_initcall(tegra_edp_debugfs_init);
#endif /* CONFIG_DEBUG_FS */
|
