diff options
Diffstat (limited to 'roms/u-boot/drivers/pinctrl/rockchip/pinctrl-rk3368.c')
| -rw-r--r-- | roms/u-boot/drivers/pinctrl/rockchip/pinctrl-rk3368.c | 184 |
1 files changed, 184 insertions, 0 deletions
diff --git a/roms/u-boot/drivers/pinctrl/rockchip/pinctrl-rk3368.c b/roms/u-boot/drivers/pinctrl/rockchip/pinctrl-rk3368.c new file mode 100644 index 000000000..18d3e3a9b --- /dev/null +++ b/roms/u-boot/drivers/pinctrl/rockchip/pinctrl-rk3368.c @@ -0,0 +1,184 @@ +// 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 <syscon.h> + +#include "pinctrl-rockchip.h" + +static int rk3368_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; + + 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); + + data = (mask << (bit + 16)); + data |= (mux & mask) << bit; + ret = regmap_write(regmap, reg, data); + + return ret; +} + +#define RK3368_PULL_GRF_OFFSET 0x100 +#define RK3368_PULL_PMU_OFFSET 0x10 + +static void rk3368_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 32 pins of the first bank are located in PMU */ + if (bank->bank_num == 0) { + *regmap = priv->regmap_pmu; + *reg = RK3368_PULL_PMU_OFFSET; + } else { + *regmap = priv->regmap_base; + *reg = RK3368_PULL_GRF_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 rk3368_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; + + rk3368_calc_pull_reg_and_bit(bank, pin_num, ®map, ®, &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; + } + + /* 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 RK3368_DRV_PMU_OFFSET 0x20 +#define RK3368_DRV_GRF_OFFSET 0x200 + +static void rk3368_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 32 pins of the first bank are located in PMU */ + if (bank->bank_num == 0) { + *regmap = priv->regmap_pmu; + *reg = RK3368_DRV_PMU_OFFSET; + } else { + *regmap = priv->regmap_base; + *reg = RK3368_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 rk3368_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; + + rk3368_calc_drv_reg_and_bit(bank, pin_num, ®map, ®, &bit); + ret = rockchip_translate_drive_value(type, strength); + if (ret < 0) { + debug("unsupported driver strength %d\n", strength); + return ret; + } + + /* 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 rk3368_pin_banks[] = { + PIN_BANK_IOMUX_FLAGS(0, 32, "gpio0", IOMUX_SOURCE_PMU, + IOMUX_SOURCE_PMU, + IOMUX_SOURCE_PMU, + IOMUX_SOURCE_PMU + ), + PIN_BANK(1, 32, "gpio1"), + PIN_BANK(2, 32, "gpio2"), + PIN_BANK(3, 32, "gpio3"), +}; + +static struct rockchip_pin_ctrl rk3368_pin_ctrl = { + .pin_banks = rk3368_pin_banks, + .nr_banks = ARRAY_SIZE(rk3368_pin_banks), + .grf_mux_offset = 0x0, + .pmu_mux_offset = 0x0, + .set_mux = rk3368_set_mux, + .set_pull = rk3368_set_pull, + .set_drive = rk3368_set_drive, +}; + +static const struct udevice_id rk3368_pinctrl_ids[] = { + { + .compatible = "rockchip,rk3368-pinctrl", + .data = (ulong)&rk3368_pin_ctrl + }, + { } +}; + +U_BOOT_DRIVER(rockchip_rk3368_pinctrl) = { + .name = "rockchip_rk3368_pinctrl", + .id = UCLASS_PINCTRL, + .of_match = rk3368_pinctrl_ids, + .priv_auto = sizeof(struct rockchip_pinctrl_priv), + .ops = &rockchip_pinctrl_ops, +#if !CONFIG_IS_ENABLED(OF_PLATDATA) + .bind = dm_scan_fdt_dev, +#endif + .probe = rockchip_pinctrl_probe, +}; |