mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-14 08:13:56 +08:00
bb3e815b80
This patch adds support 1.7GHz max frequency for EXYNOS5250 Signed-off-by: Jaecheol Lee <jc.lee@samsung.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
341 lines
8.8 KiB
C
341 lines
8.8 KiB
C
/*
|
|
* Copyright (c) 2010-20122Samsung Electronics Co., Ltd.
|
|
* http://www.samsung.com
|
|
*
|
|
* EXYNOS5250 - CPU frequency scaling support
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/err.h>
|
|
#include <linux/clk.h>
|
|
#include <linux/io.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/cpufreq.h>
|
|
|
|
#include <mach/map.h>
|
|
#include <mach/regs-clock.h>
|
|
#include <mach/cpufreq.h>
|
|
|
|
#define CPUFREQ_LEVEL_END (L15 + 1)
|
|
|
|
static int max_support_idx;
|
|
static int min_support_idx = (CPUFREQ_LEVEL_END - 1);
|
|
static struct clk *cpu_clk;
|
|
static struct clk *moutcore;
|
|
static struct clk *mout_mpll;
|
|
static struct clk *mout_apll;
|
|
|
|
struct cpufreq_clkdiv {
|
|
unsigned int index;
|
|
unsigned int clkdiv;
|
|
unsigned int clkdiv1;
|
|
};
|
|
|
|
static unsigned int exynos5250_volt_table[CPUFREQ_LEVEL_END];
|
|
|
|
static struct cpufreq_frequency_table exynos5250_freq_table[] = {
|
|
{L0, 1700 * 1000},
|
|
{L1, 1600 * 1000},
|
|
{L2, 1500 * 1000},
|
|
{L3, 1400 * 1000},
|
|
{L4, 1300 * 1000},
|
|
{L5, 1200 * 1000},
|
|
{L6, 1100 * 1000},
|
|
{L7, 1000 * 1000},
|
|
{L8, 900 * 1000},
|
|
{L9, 800 * 1000},
|
|
{L10, 700 * 1000},
|
|
{L11, 600 * 1000},
|
|
{L12, 500 * 1000},
|
|
{L13, 400 * 1000},
|
|
{L14, 300 * 1000},
|
|
{L15, 200 * 1000},
|
|
{0, CPUFREQ_TABLE_END},
|
|
};
|
|
|
|
static struct cpufreq_clkdiv exynos5250_clkdiv_table[CPUFREQ_LEVEL_END];
|
|
|
|
static unsigned int clkdiv_cpu0_5250[CPUFREQ_LEVEL_END][8] = {
|
|
/*
|
|
* Clock divider value for following
|
|
* { ARM, CPUD, ACP, PERIPH, ATB, PCLK_DBG, APLL, ARM2 }
|
|
*/
|
|
{ 0, 3, 7, 7, 7, 3, 5, 0 }, /* 1700 MHz */
|
|
{ 0, 3, 7, 7, 7, 1, 4, 0 }, /* 1600 MHz */
|
|
{ 0, 2, 7, 7, 7, 1, 4, 0 }, /* 1500 MHz */
|
|
{ 0, 2, 7, 7, 6, 1, 4, 0 }, /* 1400 MHz */
|
|
{ 0, 2, 7, 7, 6, 1, 3, 0 }, /* 1300 MHz */
|
|
{ 0, 2, 7, 7, 5, 1, 3, 0 }, /* 1200 MHz */
|
|
{ 0, 3, 7, 7, 5, 1, 3, 0 }, /* 1100 MHz */
|
|
{ 0, 1, 7, 7, 4, 1, 2, 0 }, /* 1000 MHz */
|
|
{ 0, 1, 7, 7, 4, 1, 2, 0 }, /* 900 MHz */
|
|
{ 0, 1, 7, 7, 4, 1, 2, 0 }, /* 800 MHz */
|
|
{ 0, 1, 7, 7, 3, 1, 1, 0 }, /* 700 MHz */
|
|
{ 0, 1, 7, 7, 3, 1, 1, 0 }, /* 600 MHz */
|
|
{ 0, 1, 7, 7, 2, 1, 1, 0 }, /* 500 MHz */
|
|
{ 0, 1, 7, 7, 2, 1, 1, 0 }, /* 400 MHz */
|
|
{ 0, 1, 7, 7, 1, 1, 1, 0 }, /* 300 MHz */
|
|
{ 0, 1, 7, 7, 1, 1, 1, 0 }, /* 200 MHz */
|
|
};
|
|
|
|
static unsigned int clkdiv_cpu1_5250[CPUFREQ_LEVEL_END][2] = {
|
|
/* Clock divider value for following
|
|
* { COPY, HPM }
|
|
*/
|
|
{ 0, 2 }, /* 1700 MHz */
|
|
{ 0, 2 }, /* 1600 MHz */
|
|
{ 0, 2 }, /* 1500 MHz */
|
|
{ 0, 2 }, /* 1400 MHz */
|
|
{ 0, 2 }, /* 1300 MHz */
|
|
{ 0, 2 }, /* 1200 MHz */
|
|
{ 0, 2 }, /* 1100 MHz */
|
|
{ 0, 2 }, /* 1000 MHz */
|
|
{ 0, 2 }, /* 900 MHz */
|
|
{ 0, 2 }, /* 800 MHz */
|
|
{ 0, 2 }, /* 700 MHz */
|
|
{ 0, 2 }, /* 600 MHz */
|
|
{ 0, 2 }, /* 500 MHz */
|
|
{ 0, 2 }, /* 400 MHz */
|
|
{ 0, 2 }, /* 300 MHz */
|
|
{ 0, 2 }, /* 200 MHz */
|
|
};
|
|
|
|
static unsigned int exynos5_apll_pms_table[CPUFREQ_LEVEL_END] = {
|
|
((425 << 16) | (6 << 8) | 0), /* 1700 MHz */
|
|
((200 << 16) | (3 << 8) | 0), /* 1600 MHz */
|
|
((250 << 16) | (4 << 8) | 0), /* 1500 MHz */
|
|
((175 << 16) | (3 << 8) | 0), /* 1400 MHz */
|
|
((325 << 16) | (6 << 8) | 0), /* 1300 MHz */
|
|
((200 << 16) | (4 << 8) | 0), /* 1200 MHz */
|
|
((275 << 16) | (6 << 8) | 0), /* 1100 MHz */
|
|
((125 << 16) | (3 << 8) | 0), /* 1000 MHz */
|
|
((150 << 16) | (4 << 8) | 0), /* 900 MHz */
|
|
((100 << 16) | (3 << 8) | 0), /* 800 MHz */
|
|
((175 << 16) | (3 << 8) | 1), /* 700 MHz */
|
|
((200 << 16) | (4 << 8) | 1), /* 600 MHz */
|
|
((125 << 16) | (3 << 8) | 1), /* 500 MHz */
|
|
((100 << 16) | (3 << 8) | 1), /* 400 MHz */
|
|
((200 << 16) | (4 << 8) | 2), /* 300 MHz */
|
|
((100 << 16) | (3 << 8) | 2), /* 200 MHz */
|
|
};
|
|
|
|
/* ASV group voltage table */
|
|
static const unsigned int asv_voltage_5250[CPUFREQ_LEVEL_END] = {
|
|
1300000, 1250000, 1225000, 1200000, 1150000,
|
|
1125000, 1100000, 1075000, 1050000, 1025000,
|
|
1012500, 1000000, 975000, 950000, 937500,
|
|
925000
|
|
};
|
|
|
|
static void set_clkdiv(unsigned int div_index)
|
|
{
|
|
unsigned int tmp;
|
|
|
|
/* Change Divider - CPU0 */
|
|
|
|
tmp = exynos5250_clkdiv_table[div_index].clkdiv;
|
|
|
|
__raw_writel(tmp, EXYNOS5_CLKDIV_CPU0);
|
|
|
|
while (__raw_readl(EXYNOS5_CLKDIV_STATCPU0) & 0x11111111)
|
|
cpu_relax();
|
|
|
|
/* Change Divider - CPU1 */
|
|
tmp = exynos5250_clkdiv_table[div_index].clkdiv1;
|
|
|
|
__raw_writel(tmp, EXYNOS5_CLKDIV_CPU1);
|
|
|
|
while (__raw_readl(EXYNOS5_CLKDIV_STATCPU1) & 0x11)
|
|
cpu_relax();
|
|
}
|
|
|
|
static void set_apll(unsigned int new_index,
|
|
unsigned int old_index)
|
|
{
|
|
unsigned int tmp, pdiv;
|
|
|
|
/* 1. MUX_CORE_SEL = MPLL, ARMCLK uses MPLL for lock time */
|
|
clk_set_parent(moutcore, mout_mpll);
|
|
|
|
do {
|
|
cpu_relax();
|
|
tmp = (__raw_readl(EXYNOS5_CLKMUX_STATCPU) >> 16);
|
|
tmp &= 0x7;
|
|
} while (tmp != 0x2);
|
|
|
|
/* 2. Set APLL Lock time */
|
|
pdiv = ((exynos5_apll_pms_table[new_index] >> 8) & 0x3f);
|
|
|
|
__raw_writel((pdiv * 250), EXYNOS5_APLL_LOCK);
|
|
|
|
/* 3. Change PLL PMS values */
|
|
tmp = __raw_readl(EXYNOS5_APLL_CON0);
|
|
tmp &= ~((0x3ff << 16) | (0x3f << 8) | (0x7 << 0));
|
|
tmp |= exynos5_apll_pms_table[new_index];
|
|
__raw_writel(tmp, EXYNOS5_APLL_CON0);
|
|
|
|
/* 4. wait_lock_time */
|
|
do {
|
|
cpu_relax();
|
|
tmp = __raw_readl(EXYNOS5_APLL_CON0);
|
|
} while (!(tmp & (0x1 << 29)));
|
|
|
|
/* 5. MUX_CORE_SEL = APLL */
|
|
clk_set_parent(moutcore, mout_apll);
|
|
|
|
do {
|
|
cpu_relax();
|
|
tmp = __raw_readl(EXYNOS5_CLKMUX_STATCPU);
|
|
tmp &= (0x7 << 16);
|
|
} while (tmp != (0x1 << 16));
|
|
|
|
}
|
|
|
|
bool exynos5250_pms_change(unsigned int old_index, unsigned int new_index)
|
|
{
|
|
unsigned int old_pm = (exynos5_apll_pms_table[old_index] >> 8);
|
|
unsigned int new_pm = (exynos5_apll_pms_table[new_index] >> 8);
|
|
|
|
return (old_pm == new_pm) ? 0 : 1;
|
|
}
|
|
|
|
static void exynos5250_set_frequency(unsigned int old_index,
|
|
unsigned int new_index)
|
|
{
|
|
unsigned int tmp;
|
|
|
|
if (old_index > new_index) {
|
|
if (!exynos5250_pms_change(old_index, new_index)) {
|
|
/* 1. Change the system clock divider values */
|
|
set_clkdiv(new_index);
|
|
/* 2. Change just s value in apll m,p,s value */
|
|
tmp = __raw_readl(EXYNOS5_APLL_CON0);
|
|
tmp &= ~(0x7 << 0);
|
|
tmp |= (exynos5_apll_pms_table[new_index] & 0x7);
|
|
__raw_writel(tmp, EXYNOS5_APLL_CON0);
|
|
|
|
} else {
|
|
/* Clock Configuration Procedure */
|
|
/* 1. Change the system clock divider values */
|
|
set_clkdiv(new_index);
|
|
/* 2. Change the apll m,p,s value */
|
|
set_apll(new_index, old_index);
|
|
}
|
|
} else if (old_index < new_index) {
|
|
if (!exynos5250_pms_change(old_index, new_index)) {
|
|
/* 1. Change just s value in apll m,p,s value */
|
|
tmp = __raw_readl(EXYNOS5_APLL_CON0);
|
|
tmp &= ~(0x7 << 0);
|
|
tmp |= (exynos5_apll_pms_table[new_index] & 0x7);
|
|
__raw_writel(tmp, EXYNOS5_APLL_CON0);
|
|
/* 2. Change the system clock divider values */
|
|
set_clkdiv(new_index);
|
|
} else {
|
|
/* Clock Configuration Procedure */
|
|
/* 1. Change the apll m,p,s value */
|
|
set_apll(new_index, old_index);
|
|
/* 2. Change the system clock divider values */
|
|
set_clkdiv(new_index);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void __init set_volt_table(void)
|
|
{
|
|
unsigned int i;
|
|
|
|
max_support_idx = L0;
|
|
|
|
for (i = 0 ; i < CPUFREQ_LEVEL_END ; i++)
|
|
exynos5250_volt_table[i] = asv_voltage_5250[i];
|
|
}
|
|
|
|
int exynos5250_cpufreq_init(struct exynos_dvfs_info *info)
|
|
{
|
|
int i;
|
|
unsigned int tmp;
|
|
unsigned long rate;
|
|
|
|
set_volt_table();
|
|
|
|
cpu_clk = clk_get(NULL, "armclk");
|
|
if (IS_ERR(cpu_clk))
|
|
return PTR_ERR(cpu_clk);
|
|
|
|
moutcore = clk_get(NULL, "mout_cpu");
|
|
if (IS_ERR(moutcore))
|
|
goto err_moutcore;
|
|
|
|
mout_mpll = clk_get(NULL, "mout_mpll");
|
|
if (IS_ERR(mout_mpll))
|
|
goto err_mout_mpll;
|
|
|
|
rate = clk_get_rate(mout_mpll) / 1000;
|
|
|
|
mout_apll = clk_get(NULL, "mout_apll");
|
|
if (IS_ERR(mout_apll))
|
|
goto err_mout_apll;
|
|
|
|
for (i = L0; i < CPUFREQ_LEVEL_END; i++) {
|
|
|
|
exynos5250_clkdiv_table[i].index = i;
|
|
|
|
tmp = __raw_readl(EXYNOS5_CLKDIV_CPU0);
|
|
|
|
tmp &= ~((0x7 << 0) | (0x7 << 4) | (0x7 << 8) |
|
|
(0x7 << 12) | (0x7 << 16) | (0x7 << 20) |
|
|
(0x7 << 24) | (0x7 << 28));
|
|
|
|
tmp |= ((clkdiv_cpu0_5250[i][0] << 0) |
|
|
(clkdiv_cpu0_5250[i][1] << 4) |
|
|
(clkdiv_cpu0_5250[i][2] << 8) |
|
|
(clkdiv_cpu0_5250[i][3] << 12) |
|
|
(clkdiv_cpu0_5250[i][4] << 16) |
|
|
(clkdiv_cpu0_5250[i][5] << 20) |
|
|
(clkdiv_cpu0_5250[i][6] << 24) |
|
|
(clkdiv_cpu0_5250[i][7] << 28));
|
|
|
|
exynos5250_clkdiv_table[i].clkdiv = tmp;
|
|
|
|
tmp = __raw_readl(EXYNOS5_CLKDIV_CPU1);
|
|
|
|
tmp &= ~((0x7 << 0) | (0x7 << 4));
|
|
|
|
tmp |= ((clkdiv_cpu1_5250[i][0] << 0) |
|
|
(clkdiv_cpu1_5250[i][1] << 4));
|
|
|
|
exynos5250_clkdiv_table[i].clkdiv1 = tmp;
|
|
}
|
|
|
|
info->mpll_freq_khz = rate;
|
|
/* 1000Mhz */
|
|
info->pm_lock_idx = L7;
|
|
/* 800Mhz */
|
|
info->pll_safe_idx = L9;
|
|
info->max_support_idx = max_support_idx;
|
|
info->min_support_idx = min_support_idx;
|
|
info->cpu_clk = cpu_clk;
|
|
info->volt_table = exynos5250_volt_table;
|
|
info->freq_table = exynos5250_freq_table;
|
|
info->set_freq = exynos5250_set_frequency;
|
|
info->need_apll_change = exynos5250_pms_change;
|
|
|
|
return 0;
|
|
|
|
err_mout_apll:
|
|
clk_put(mout_mpll);
|
|
err_mout_mpll:
|
|
clk_put(moutcore);
|
|
err_moutcore:
|
|
clk_put(cpu_clk);
|
|
|
|
pr_err("%s: failed initialization\n", __func__);
|
|
return -EINVAL;
|
|
}
|
|
EXPORT_SYMBOL(exynos5250_cpufreq_init);
|