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/*
* board/amlogic/gxb_p200_v1/firmware/power.c
*
* Copyright (C) 2015 Amlogic, Inc. 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.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include "config.h"
#include <serial.h>
//#include <stdio.h>
#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
static int pwm_voltage_table[][2] = {
{ 0x1c0000, 860},
{ 0x1b0001, 870},
{ 0x1a0002, 880},
{ 0x190003, 890},
{ 0x180004, 900},
{ 0x170005, 910},
{ 0x160006, 920},
{ 0x150007, 930},
{ 0x140008, 940},
{ 0x130009, 950},
{ 0x12000a, 960},
{ 0x11000b, 970},
{ 0x10000c, 980},
{ 0x0f000d, 990},
{ 0x0e000e, 1000},
{ 0x0d000f, 1010},
{ 0x0c0010, 1020},
{ 0x0b0011, 1030},
{ 0x0a0012, 1040},
{ 0x090013, 1050},
{ 0x080014, 1060},
{ 0x070015, 1070},
{ 0x060016, 1080},
{ 0x050017, 1090},
{ 0x040018, 1100},
{ 0x030019, 1110},
{ 0x02001a, 1120},
{ 0x01001b, 1130},
{ 0x00001c, 1140}
};
#define P_PIN_MUX_REG3 (*((volatile unsigned *)(0xda834400 + (0x2f << 2))))
#define P_PIN_MUX_REG7 (*((volatile unsigned *)(0xda834400 + (0x33 << 2))))
#define P_PWM_MISC_REG_AB (*((volatile unsigned *)(0xc1100000 + (0x2156 << 2))))
#define P_PWM_PWM_B (*((volatile unsigned *)(0xc1100000 + (0x2155 << 2))))
#define P_PWM_MISC_REG_CD (*((volatile unsigned *)(0xc1100000 + (0x2196 << 2))))
#define P_PWM_PWM_D (*((volatile unsigned *)(0xc1100000 + (0x2195 << 2))))
#define P_EE_TIMER_E (*((volatile unsigned *)(0xc1100000 + (0x2662 << 2))))
enum pwm_id {
pwm_a = 0,
pwm_b,
pwm_c,
pwm_d,
pwm_e,
pwm_f,
};
unsigned int _get_time(void)
{
return P_EE_TIMER_E;
}
void _udelay_(unsigned int us)
{
unsigned int t0 = _get_time();
while (_get_time() - t0 <= us)
;
}
void pwm_init(int id)
{
unsigned int reg;
/*
* TODO: support more pwm controllers, right now only support
* PWM_B, PWM_D
*/
switch (id) {
case pwm_b:
reg = P_PWM_MISC_REG_AB;
reg &= ~(0x7f << 16);
reg |= ((1 << 23) | (1 << 1));
P_PWM_MISC_REG_AB = reg;
/*
* default set to max voltage
*/
P_PWM_PWM_B = pwm_voltage_table[ARRAY_SIZE(pwm_voltage_table) - 1][0];
reg = P_PIN_MUX_REG7;
reg &= ~(1 << 22);
P_PIN_MUX_REG7 = reg;
reg = P_PIN_MUX_REG3;
reg &= ~(1 << 22);
reg |= (1 << 21); // enable PWM_B
P_PIN_MUX_REG3 = reg;
break;
case pwm_d:
reg = P_PWM_MISC_REG_CD;
reg &= ~(0x7f << 16);
reg |= ((1 << 23) | (1 << 1));
P_PWM_MISC_REG_CD = reg;
/*
* default set to max voltage
*/
P_PWM_PWM_D = pwm_voltage_table[ARRAY_SIZE(pwm_voltage_table) - 1][0];
reg = P_PIN_MUX_REG7;
reg &= ~(1 << 23);
P_PIN_MUX_REG7 = reg;
reg = P_PIN_MUX_REG3;
reg |= (1 << 20); // enable PWM_D
P_PIN_MUX_REG3 = reg;
break;
default:
break;
}
_udelay_(200);
}
void pwm_set_voltage(unsigned int id, unsigned int voltage)
{
int to;
for (to = 0; to < ARRAY_SIZE(pwm_voltage_table); to++) {
if (pwm_voltage_table[to][1] >= voltage) {
break;
}
}
if (to >= ARRAY_SIZE(pwm_voltage_table)) {
to = ARRAY_SIZE(pwm_voltage_table) - 1;
}
switch (id) {
case pwm_b:
P_PWM_PWM_B = pwm_voltage_table[to][0];
break;
case pwm_d:
P_PWM_PWM_D = pwm_voltage_table[to][0];
break;
default:
break;
}
_udelay_(200);
}
void power_init(int mode)
{
pwm_init(pwm_b);
pwm_init(pwm_d);
serial_puts("set vcck to ");
serial_put_dec(CONFIG_VCCK_INIT_VOLTAGE);
serial_puts(" mv\n");
pwm_set_voltage(pwm_b, CONFIG_VCCK_INIT_VOLTAGE);
serial_puts("set vddee to ");
serial_put_dec(CONFIG_VDDEE_INIT_VOLTAGE);
serial_puts(" mv\n");
pwm_set_voltage(pwm_d, CONFIG_VDDEE_INIT_VOLTAGE);
}