u-boot/drivers/pinctrl/rockchip/pinctrl-rk3288.c

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// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2019 Rockchip Electronics Co., Ltd
*/
#include <common.h>
#include <dm.h>
#include <log.h>
#include <dm/pinctrl.h>
#include <regmap.h>
#include <linux/bitops.h>
#include "pinctrl-rockchip.h"
static struct rockchip_mux_route_data rk3288_mux_route_data[] = {
{
/* edphdmi_cecinoutt1 */
.bank_num = 7,
.pin = 16,
.func = 2,
.route_offset = 0x264,
.route_val = BIT(16 + 12) | BIT(12),
}, {
/* edphdmi_cecinout */
.bank_num = 7,
.pin = 23,
.func = 4,
.route_offset = 0x264,
.route_val = BIT(16 + 12),
},
};
static int rk3288_set_mux(struct rockchip_pin_bank *bank, int pin, int mux)
{
struct rockchip_pinctrl_priv *priv = bank->priv;
int iomux_num = (pin / 8);
struct regmap *regmap;
int reg, ret, mask, mux_type;
u8 bit;
u32 data, route_reg, route_val;
regmap = (bank->iomux[iomux_num].type & IOMUX_SOURCE_PMU)
? priv->regmap_pmu : priv->regmap_base;
/* get basic quadrupel of mux registers and the correct reg inside */
mux_type = bank->iomux[iomux_num].type;
reg = bank->iomux[iomux_num].offset;
reg += rockchip_get_mux_data(mux_type, pin, &bit, &mask);
if (bank->route_mask & BIT(pin)) {
if (rockchip_get_mux_route(bank, pin, mux, &route_reg,
&route_val)) {
ret = regmap_write(regmap, route_reg, route_val);
if (ret)
return ret;
}
}
/* bank0 is special, there are no higher 16 bit writing bits. */
if (bank->bank_num == 0) {
regmap_read(regmap, reg, &data);
data &= ~(mask << bit);
} else {
/* enable the write to the equivalent lower bits */
data = (mask << (bit + 16));
}
data |= (mux & mask) << bit;
ret = regmap_write(regmap, reg, data);
return ret;
}
#define RK3288_PULL_OFFSET 0x140
#define RK3288_PULL_PMU_OFFSET 0x64
static void rk3288_calc_pull_reg_and_bit(struct rockchip_pin_bank *bank,
int pin_num, struct regmap **regmap,
int *reg, u8 *bit)
{
struct rockchip_pinctrl_priv *priv = bank->priv;
/* The first 24 pins of the first bank are located in PMU */
if (bank->bank_num == 0) {
*regmap = priv->regmap_pmu;
*reg = RK3288_PULL_PMU_OFFSET;
} else {
*regmap = priv->regmap_base;
*reg = RK3288_PULL_OFFSET;
/* correct the offset, as we're starting with the 2nd bank */
*reg -= 0x10;
*reg += bank->bank_num * ROCKCHIP_PULL_BANK_STRIDE;
}
*reg += ((pin_num / ROCKCHIP_PULL_PINS_PER_REG) * 4);
*bit = (pin_num % ROCKCHIP_PULL_PINS_PER_REG);
*bit *= ROCKCHIP_PULL_BITS_PER_PIN;
}
static int rk3288_set_pull(struct rockchip_pin_bank *bank,
int pin_num, int pull)
{
struct regmap *regmap;
int reg, ret;
u8 bit, type;
u32 data;
if (pull == PIN_CONFIG_BIAS_PULL_PIN_DEFAULT)
return -ENOTSUPP;
rk3288_calc_pull_reg_and_bit(bank, pin_num, &regmap, &reg, &bit);
type = bank->pull_type[pin_num / 8];
ret = rockchip_translate_pull_value(type, pull);
if (ret < 0) {
debug("unsupported pull setting %d\n", pull);
return ret;
}
/* bank0 is special, there are no higher 16 bit writing bits */
if (bank->bank_num == 0) {
regmap_read(regmap, reg, &data);
data &= ~(((1 << ROCKCHIP_PULL_BITS_PER_PIN) - 1) << bit);
} else {
/* enable the write to the equivalent lower bits */
data = ((1 << ROCKCHIP_PULL_BITS_PER_PIN) - 1) << (bit + 16);
}
data |= (ret << bit);
ret = regmap_write(regmap, reg, data);
return ret;
}
#define RK3288_DRV_PMU_OFFSET 0x70
#define RK3288_DRV_GRF_OFFSET 0x1c0
static void rk3288_calc_drv_reg_and_bit(struct rockchip_pin_bank *bank,
int pin_num, struct regmap **regmap,
int *reg, u8 *bit)
{
struct rockchip_pinctrl_priv *priv = bank->priv;
/* The first 24 pins of the first bank are located in PMU */
if (bank->bank_num == 0) {
*regmap = priv->regmap_pmu;
*reg = RK3288_DRV_PMU_OFFSET;
} else {
*regmap = priv->regmap_base;
*reg = RK3288_DRV_GRF_OFFSET;
/* correct the offset, as we're starting with the 2nd bank */
*reg -= 0x10;
*reg += bank->bank_num * ROCKCHIP_DRV_BANK_STRIDE;
}
*reg += ((pin_num / ROCKCHIP_DRV_PINS_PER_REG) * 4);
*bit = (pin_num % ROCKCHIP_DRV_PINS_PER_REG);
*bit *= ROCKCHIP_DRV_BITS_PER_PIN;
}
static int rk3288_set_drive(struct rockchip_pin_bank *bank,
int pin_num, int strength)
{
struct regmap *regmap;
int reg, ret;
u32 data;
u8 bit;
int type = bank->drv[pin_num / 8].drv_type;
rk3288_calc_drv_reg_and_bit(bank, pin_num, &regmap, &reg, &bit);
ret = rockchip_translate_drive_value(type, strength);
if (ret < 0) {
debug("unsupported driver strength %d\n", strength);
return ret;
}
/* bank0 is special, there are no higher 16 bit writing bits. */
if (bank->bank_num == 0) {
regmap_read(regmap, reg, &data);
data &= ~(((1 << ROCKCHIP_DRV_BITS_PER_PIN) - 1) << bit);
} else {
/* enable the write to the equivalent lower bits */
data = ((1 << ROCKCHIP_DRV_BITS_PER_PIN) - 1) << (bit + 16);
}
data |= (ret << bit);
ret = regmap_write(regmap, reg, data);
return ret;
}
static struct rockchip_pin_bank rk3288_pin_banks[] = {
PIN_BANK_IOMUX_FLAGS(0, 24, "gpio0", IOMUX_SOURCE_PMU,
IOMUX_SOURCE_PMU,
IOMUX_SOURCE_PMU,
IOMUX_UNROUTED
),
PIN_BANK_IOMUX_FLAGS(1, 32, "gpio1", IOMUX_UNROUTED,
IOMUX_UNROUTED,
IOMUX_UNROUTED,
0
),
PIN_BANK_IOMUX_FLAGS(2, 32, "gpio2", 0, 0, 0, IOMUX_UNROUTED),
PIN_BANK_IOMUX_FLAGS(3, 32, "gpio3", 0, 0, 0, IOMUX_WIDTH_4BIT),
PIN_BANK_IOMUX_FLAGS(4, 32, "gpio4", IOMUX_WIDTH_4BIT,
IOMUX_WIDTH_4BIT,
0,
0
),
PIN_BANK_IOMUX_FLAGS(5, 32, "gpio5", IOMUX_UNROUTED,
0,
0,
IOMUX_UNROUTED
),
PIN_BANK_IOMUX_FLAGS(6, 32, "gpio6", 0, 0, 0, IOMUX_UNROUTED),
PIN_BANK_IOMUX_FLAGS(7, 32, "gpio7", 0,
0,
IOMUX_WIDTH_4BIT,
IOMUX_UNROUTED
),
PIN_BANK(8, 16, "gpio8"),
};
static struct rockchip_pin_ctrl rk3288_pin_ctrl = {
.pin_banks = rk3288_pin_banks,
.nr_banks = ARRAY_SIZE(rk3288_pin_banks),
.grf_mux_offset = 0x0,
.pmu_mux_offset = 0x84,
.iomux_routes = rk3288_mux_route_data,
.niomux_routes = ARRAY_SIZE(rk3288_mux_route_data),
.set_mux = rk3288_set_mux,
.set_pull = rk3288_set_pull,
.set_drive = rk3288_set_drive,
};
static const struct udevice_id rk3288_pinctrl_ids[] = {
{
.compatible = "rockchip,rk3288-pinctrl",
.data = (ulong)&rk3288_pin_ctrl
},
{ }
};
U_BOOT_DRIVER(rockchip_rk3288_pinctrl) = {
.name = "rockchip_rk3288_pinctrl",
.id = UCLASS_PINCTRL,
.of_match = rk3288_pinctrl_ids,
.priv_auto = sizeof(struct rockchip_pinctrl_priv),
.ops = &rockchip_pinctrl_ops,
#if CONFIG_IS_ENABLED(OF_REAL)
.bind = dm_scan_fdt_dev,
#endif
.probe = rockchip_pinctrl_probe,
};