1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * (C) Copyright 2019 Rockchip Electronics Co., Ltd
4 */
5
6 #include <common.h>
7 #include <dm.h>
8 #include <dm/pinctrl.h>
9 #include <regmap.h>
10 #include <syscon.h>
11 #include <linux/bitops.h>
12
13 #include "pinctrl-rockchip.h"
14
rk3036_set_mux(struct rockchip_pin_bank * bank,int pin,int mux)15 static int rk3036_set_mux(struct rockchip_pin_bank *bank, int pin, int mux)
16 {
17 struct rockchip_pinctrl_priv *priv = bank->priv;
18 int iomux_num = (pin / 8);
19 struct regmap *regmap;
20 int reg, ret, mask, mux_type;
21 u8 bit;
22 u32 data;
23
24 regmap = (bank->iomux[iomux_num].type & IOMUX_SOURCE_PMU)
25 ? priv->regmap_pmu : priv->regmap_base;
26
27 /* get basic quadrupel of mux registers and the correct reg inside */
28 mux_type = bank->iomux[iomux_num].type;
29 reg = bank->iomux[iomux_num].offset;
30 reg += rockchip_get_mux_data(mux_type, pin, &bit, &mask);
31
32 data = (mask << (bit + 16));
33 data |= (mux & mask) << bit;
34 ret = regmap_write(regmap, reg, data);
35
36 return ret;
37 }
38
39 #define RK3036_PULL_OFFSET 0x118
40 #define RK3036_PULL_PINS_PER_REG 16
41 #define RK3036_PULL_BANK_STRIDE 8
42
rk3036_calc_pull_reg_and_bit(struct rockchip_pin_bank * bank,int pin_num,struct regmap ** regmap,int * reg,u8 * bit)43 static void rk3036_calc_pull_reg_and_bit(struct rockchip_pin_bank *bank,
44 int pin_num, struct regmap **regmap,
45 int *reg, u8 *bit)
46 {
47 struct rockchip_pinctrl_priv *priv = bank->priv;
48
49 *regmap = priv->regmap_base;
50 *reg = RK3036_PULL_OFFSET;
51 *reg += bank->bank_num * RK3036_PULL_BANK_STRIDE;
52 *reg += (pin_num / RK3036_PULL_PINS_PER_REG) * 4;
53
54 *bit = pin_num % RK3036_PULL_PINS_PER_REG;
55 };
56
rk3036_set_pull(struct rockchip_pin_bank * bank,int pin_num,int pull)57 static int rk3036_set_pull(struct rockchip_pin_bank *bank,
58 int pin_num, int pull)
59 {
60 struct regmap *regmap;
61 int reg, ret;
62 u8 bit;
63 u32 data;
64
65 if (pull != PIN_CONFIG_BIAS_PULL_PIN_DEFAULT &&
66 pull != PIN_CONFIG_BIAS_DISABLE)
67 return -ENOTSUPP;
68
69 rk3036_calc_pull_reg_and_bit(bank, pin_num, ®map, ®, &bit);
70 data = BIT(bit + 16);
71 if (pull == PIN_CONFIG_BIAS_DISABLE)
72 data |= BIT(bit);
73 ret = regmap_write(regmap, reg, data);
74
75 return ret;
76 }
77
78 static struct rockchip_pin_bank rk3036_pin_banks[] = {
79 PIN_BANK(0, 32, "gpio0"),
80 PIN_BANK(1, 32, "gpio1"),
81 PIN_BANK(2, 32, "gpio2"),
82 };
83
84 static struct rockchip_pin_ctrl rk3036_pin_ctrl = {
85 .pin_banks = rk3036_pin_banks,
86 .nr_banks = ARRAY_SIZE(rk3036_pin_banks),
87 .grf_mux_offset = 0xa8,
88 .set_mux = rk3036_set_mux,
89 .set_pull = rk3036_set_pull,
90 };
91
92 static const struct udevice_id rk3036_pinctrl_ids[] = {
93 {
94 .compatible = "rockchip,rk3036-pinctrl",
95 .data = (ulong)&rk3036_pin_ctrl
96 },
97 {}
98 };
99
100 U_BOOT_DRIVER(pinctrl_rockchip) = {
101 .name = "rk3036-pinctrl",
102 .id = UCLASS_PINCTRL,
103 .of_match = rk3036_pinctrl_ids,
104 .priv_auto = sizeof(struct rockchip_pinctrl_priv),
105 .ops = &rockchip_pinctrl_ops,
106 #if !CONFIG_IS_ENABLED(OF_PLATDATA)
107 .bind = dm_scan_fdt_dev,
108 #endif
109 .probe = rockchip_pinctrl_probe,
110 };
111