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/*
* This file is part of the coreboot project.
*
* Copyright 2018 MediaTek 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.
*
* 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.
*/
#include <device/mmio.h>
#include <gpio.h>
#include <assert.h>
#include <soc/spi.h>
enum {
EN_OFFSET = 0x60,
SEL_OFFSET = 0x80,
EH_RSEL_OFFSET = 0xF0,
GPIO_DRV0_OFFSET = 0xA0,
GPIO_DRV1_OFFSET = 0XB0,
};
static void gpio_set_pull_pupd(gpio_t gpio, enum pull_enable enable,
enum pull_select select)
{
void *reg = GPIO_TO_IOCFG_BASE(gpio.base) + gpio.offset;
int bit = gpio.bit;
if (enable == GPIO_PULL_ENABLE) {
if (select == GPIO_PULL_DOWN)
setbits_le32(reg, 1 << (bit + 2));
else
clrbits_le32(reg, 1 << (bit + 2));
}
if (enable == GPIO_PULL_ENABLE)
clrsetbits_le32(reg, 3 << bit, 1 << bit);
else
clrbits_le32(reg, 3 << bit);
}
static void gpio_set_pull_en_sel(gpio_t gpio, enum pull_enable enable,
enum pull_select select)
{
void *reg = GPIO_TO_IOCFG_BASE(gpio.base) + gpio.offset;
int bit = gpio.bit;
if (enable == GPIO_PULL_ENABLE) {
if (select == GPIO_PULL_DOWN)
clrbits_le32(reg + SEL_OFFSET, 1 << bit);
else
setbits_le32(reg + SEL_OFFSET, 1 << bit);
}
if (enable == GPIO_PULL_ENABLE)
setbits_le32(reg + EN_OFFSET, 1 << bit);
else
clrbits_le32(reg + EN_OFFSET, 1 << bit);
}
void gpio_set_pull(gpio_t gpio, enum pull_enable enable,
enum pull_select select)
{
if (gpio.flag)
gpio_set_pull_pupd(gpio, enable, select);
else
gpio_set_pull_en_sel(gpio, enable, select);
}
enum {
EH_VAL = 0x0,
RSEL_VAL = 0x3,
EH_MASK = 0x7,
RSEL_MASK = 0x3,
SCL0_EH = 19,
SCL0_RSEL = 15,
SDA0_EH = 9,
SDA0_RSEL = 5,
SCL1_EH = 22,
SCL1_RSEL = 17,
SDA1_EH = 12,
SDA1_RSEL = 7,
SCL2_EH = 24,
SCL2_RSEL = 20,
SDA2_EH = 14,
SDA2_RSEL = 10,
SCL3_EH = 12,
SCL3_RSEL = 10,
SDA3_EH = 7,
SDA3_RSEL = 5,
SCL4_EH = 27,
SCL4_RSEL = 22,
SDA4_EH = 17,
SDA4_RSEL = 12,
SCL5_EH = 20,
SCL5_RSEL = 18,
SDA5_EH = 15,
SDA5_RSEL = 13,
};
#define I2C_EH_RSL_MASK(name) \
(EH_MASK << name##_EH | RSEL_MASK << name##_RSEL)
#define I2C_EH_RSL_VAL(name) \
(EH_VAL << name##_EH | RSEL_VAL << name##_RSEL)
void gpio_set_i2c_eh_rsel(void)
{
clrsetbits_le32((void *)IOCFG_RB_BASE + EH_RSEL_OFFSET,
I2C_EH_RSL_MASK(SCL0) | I2C_EH_RSL_MASK(SDA0) |
I2C_EH_RSL_MASK(SCL1) | I2C_EH_RSL_MASK(SDA1),
I2C_EH_RSL_VAL(SCL0) | I2C_EH_RSL_VAL(SDA0) |
I2C_EH_RSL_VAL(SCL1) | I2C_EH_RSL_VAL(SDA1));
clrsetbits_le32((void *)IOCFG_RM_BASE + EH_RSEL_OFFSET,
I2C_EH_RSL_MASK(SCL2) | I2C_EH_RSL_MASK(SDA2) |
I2C_EH_RSL_MASK(SCL4) | I2C_EH_RSL_MASK(SDA4),
I2C_EH_RSL_VAL(SCL2) | I2C_EH_RSL_VAL(SDA2) |
I2C_EH_RSL_VAL(SCL4) | I2C_EH_RSL_VAL(SDA4));
clrsetbits_le32((void *)IOCFG_BL_BASE + EH_RSEL_OFFSET,
I2C_EH_RSL_MASK(SCL3) | I2C_EH_RSL_MASK(SDA3),
I2C_EH_RSL_VAL(SCL3) | I2C_EH_RSL_VAL(SDA3));
clrsetbits_le32((void *)IOCFG_LB_BASE + EH_RSEL_OFFSET,
I2C_EH_RSL_MASK(SCL5) | I2C_EH_RSL_MASK(SDA5),
I2C_EH_RSL_VAL(SCL5) | I2C_EH_RSL_VAL(SDA5));
}
void gpio_set_spi_driving(unsigned int bus, enum spi_pad_mask pad_select,
unsigned int milliamps)
{
void *reg = NULL;
unsigned int reg_val = milliamps / 2 - 1, offset = 0;
assert(bus < SPI_BUS_NUMBER);
assert(milliamps >= 2 && milliamps <= 16);
assert(pad_select <= SPI_PAD1_MASK);
switch (bus) {
case 0:
reg = (void *)(IOCFG_RB_BASE + GPIO_DRV1_OFFSET);
offset = 0;
break;
case 1:
if (pad_select == SPI_PAD0_MASK) {
reg = (void *)(IOCFG_LM_BASE + GPIO_DRV0_OFFSET);
offset = 0;
} else if (pad_select == SPI_PAD1_MASK) {
clrsetbits_le32((void *)IOCFG_RM_BASE +
GPIO_DRV0_OFFSET, 0xf | 0xf << 20,
reg_val | reg_val << 20);
clrsetbits_le32((void *)IOCFG_RM_BASE +
GPIO_DRV1_OFFSET, 0xf << 16,
reg_val << 16);
return;
}
break;
case 2:
clrsetbits_le32((void *)IOCFG_RM_BASE + GPIO_DRV0_OFFSET,
0xf << 8 | 0xf << 12,
reg_val << 8 | reg_val << 12);
return;
case 3:
reg = (void *)(IOCFG_LM_BASE + GPIO_DRV0_OFFSET);
offset = 16;
break;
case 4:
reg = (void *)(IOCFG_LM_BASE + GPIO_DRV0_OFFSET);
offset = 12;
break;
case 5:
reg = (void *)(IOCFG_LM_BASE + GPIO_DRV0_OFFSET);
offset = 8;
break;
}
clrsetbits_le32(reg, 0xf << offset, reg_val << offset);
}
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