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
12 #include "pinctrl-rockchip.h"
13
14 static struct rockchip_mux_recalced_data rv1108_mux_recalced_data[] = {
15 {
16 .num = 1,
17 .pin = 0,
18 .reg = 0x418,
19 .bit = 0,
20 .mask = 0x3
21 }, {
22 .num = 1,
23 .pin = 1,
24 .reg = 0x418,
25 .bit = 2,
26 .mask = 0x3
27 }, {
28 .num = 1,
29 .pin = 2,
30 .reg = 0x418,
31 .bit = 4,
32 .mask = 0x3
33 }, {
34 .num = 1,
35 .pin = 3,
36 .reg = 0x418,
37 .bit = 6,
38 .mask = 0x3
39 }, {
40 .num = 1,
41 .pin = 4,
42 .reg = 0x418,
43 .bit = 8,
44 .mask = 0x3
45 }, {
46 .num = 1,
47 .pin = 5,
48 .reg = 0x418,
49 .bit = 10,
50 .mask = 0x3
51 }, {
52 .num = 1,
53 .pin = 6,
54 .reg = 0x418,
55 .bit = 12,
56 .mask = 0x3
57 }, {
58 .num = 1,
59 .pin = 7,
60 .reg = 0x418,
61 .bit = 14,
62 .mask = 0x3
63 }, {
64 .num = 1,
65 .pin = 8,
66 .reg = 0x41c,
67 .bit = 0,
68 .mask = 0x3
69 }, {
70 .num = 1,
71 .pin = 9,
72 .reg = 0x41c,
73 .bit = 2,
74 .mask = 0x3
75 },
76 };
77
rv1108_set_mux(struct rockchip_pin_bank * bank,int pin,int mux)78 static int rv1108_set_mux(struct rockchip_pin_bank *bank, int pin, int mux)
79 {
80 struct rockchip_pinctrl_priv *priv = bank->priv;
81 int iomux_num = (pin / 8);
82 struct regmap *regmap;
83 int reg, ret, mask, mux_type;
84 u8 bit;
85 u32 data;
86
87 regmap = (bank->iomux[iomux_num].type & IOMUX_SOURCE_PMU)
88 ? priv->regmap_pmu : priv->regmap_base;
89
90 /* get basic quadrupel of mux registers and the correct reg inside */
91 mux_type = bank->iomux[iomux_num].type;
92 reg = bank->iomux[iomux_num].offset;
93 reg += rockchip_get_mux_data(mux_type, pin, &bit, &mask);
94
95 if (bank->recalced_mask & BIT(pin))
96 rockchip_get_recalced_mux(bank, pin, ®, &bit, &mask);
97
98 data = (mask << (bit + 16));
99 data |= (mux & mask) << bit;
100 ret = regmap_write(regmap, reg, data);
101
102 return ret;
103 }
104
105 #define RV1108_PULL_PMU_OFFSET 0x10
106 #define RV1108_PULL_OFFSET 0x110
107
rv1108_calc_pull_reg_and_bit(struct rockchip_pin_bank * bank,int pin_num,struct regmap ** regmap,int * reg,u8 * bit)108 static void rv1108_calc_pull_reg_and_bit(struct rockchip_pin_bank *bank,
109 int pin_num, struct regmap **regmap,
110 int *reg, u8 *bit)
111 {
112 struct rockchip_pinctrl_priv *priv = bank->priv;
113
114 /* The first 24 pins of the first bank are located in PMU */
115 if (bank->bank_num == 0) {
116 *regmap = priv->regmap_pmu;
117 *reg = RV1108_PULL_PMU_OFFSET;
118 } else {
119 *reg = RV1108_PULL_OFFSET;
120 *regmap = priv->regmap_base;
121 /* correct the offset, as we're starting with the 2nd bank */
122 *reg -= 0x10;
123 *reg += bank->bank_num * ROCKCHIP_PULL_BANK_STRIDE;
124 }
125
126 *reg += ((pin_num / ROCKCHIP_PULL_PINS_PER_REG) * 4);
127 *bit = (pin_num % ROCKCHIP_PULL_PINS_PER_REG);
128 *bit *= ROCKCHIP_PULL_BITS_PER_PIN;
129 }
130
rv1108_set_pull(struct rockchip_pin_bank * bank,int pin_num,int pull)131 static int rv1108_set_pull(struct rockchip_pin_bank *bank,
132 int pin_num, int pull)
133 {
134 struct regmap *regmap;
135 int reg, ret;
136 u8 bit, type;
137 u32 data;
138
139 if (pull == PIN_CONFIG_BIAS_PULL_PIN_DEFAULT)
140 return -ENOTSUPP;
141
142 rv1108_calc_pull_reg_and_bit(bank, pin_num, ®map, ®, &bit);
143 type = bank->pull_type[pin_num / 8];
144 ret = rockchip_translate_pull_value(type, pull);
145 if (ret < 0) {
146 debug("unsupported pull setting %d\n", pull);
147 return ret;
148 }
149
150 /* enable the write to the equivalent lower bits */
151 data = ((1 << ROCKCHIP_PULL_BITS_PER_PIN) - 1) << (bit + 16);
152
153 data |= (ret << bit);
154 ret = regmap_write(regmap, reg, data);
155
156 return ret;
157 }
158
159 #define RV1108_DRV_PMU_OFFSET 0x20
160 #define RV1108_DRV_GRF_OFFSET 0x210
161
rv1108_calc_drv_reg_and_bit(struct rockchip_pin_bank * bank,int pin_num,struct regmap ** regmap,int * reg,u8 * bit)162 static void rv1108_calc_drv_reg_and_bit(struct rockchip_pin_bank *bank,
163 int pin_num, struct regmap **regmap,
164 int *reg, u8 *bit)
165 {
166 struct rockchip_pinctrl_priv *priv = bank->priv;
167
168 /* The first 24 pins of the first bank are located in PMU */
169 if (bank->bank_num == 0) {
170 *regmap = priv->regmap_pmu;
171 *reg = RV1108_DRV_PMU_OFFSET;
172 } else {
173 *regmap = priv->regmap_base;
174 *reg = RV1108_DRV_GRF_OFFSET;
175
176 /* correct the offset, as we're starting with the 2nd bank */
177 *reg -= 0x10;
178 *reg += bank->bank_num * ROCKCHIP_DRV_BANK_STRIDE;
179 }
180
181 *reg += ((pin_num / ROCKCHIP_DRV_PINS_PER_REG) * 4);
182 *bit = pin_num % ROCKCHIP_DRV_PINS_PER_REG;
183 *bit *= ROCKCHIP_DRV_BITS_PER_PIN;
184 }
185
rv1108_set_drive(struct rockchip_pin_bank * bank,int pin_num,int strength)186 static int rv1108_set_drive(struct rockchip_pin_bank *bank,
187 int pin_num, int strength)
188 {
189 struct regmap *regmap;
190 int reg, ret;
191 u32 data;
192 u8 bit;
193 int type = bank->drv[pin_num / 8].drv_type;
194
195 rv1108_calc_drv_reg_and_bit(bank, pin_num, ®map, ®, &bit);
196 ret = rockchip_translate_drive_value(type, strength);
197 if (ret < 0) {
198 debug("unsupported driver strength %d\n", strength);
199 return ret;
200 }
201
202 /* enable the write to the equivalent lower bits */
203 data = ((1 << ROCKCHIP_DRV_BITS_PER_PIN) - 1) << (bit + 16);
204
205 data |= (ret << bit);
206 ret = regmap_write(regmap, reg, data);
207 return ret;
208 }
209
210 #define RV1108_SCHMITT_PMU_OFFSET 0x30
211 #define RV1108_SCHMITT_GRF_OFFSET 0x388
212 #define RV1108_SCHMITT_BANK_STRIDE 8
213 #define RV1108_SCHMITT_PINS_PER_GRF_REG 16
214 #define RV1108_SCHMITT_PINS_PER_PMU_REG 8
215
rv1108_calc_schmitt_reg_and_bit(struct rockchip_pin_bank * bank,int pin_num,struct regmap ** regmap,int * reg,u8 * bit)216 static int rv1108_calc_schmitt_reg_and_bit(struct rockchip_pin_bank *bank,
217 int pin_num,
218 struct regmap **regmap,
219 int *reg, u8 *bit)
220 {
221 struct rockchip_pinctrl_priv *priv = bank->priv;
222 int pins_per_reg;
223
224 if (bank->bank_num == 0) {
225 *regmap = priv->regmap_pmu;
226 *reg = RV1108_SCHMITT_PMU_OFFSET;
227 pins_per_reg = RV1108_SCHMITT_PINS_PER_PMU_REG;
228 } else {
229 *regmap = priv->regmap_base;
230 *reg = RV1108_SCHMITT_GRF_OFFSET;
231 pins_per_reg = RV1108_SCHMITT_PINS_PER_GRF_REG;
232 *reg += (bank->bank_num - 1) * RV1108_SCHMITT_BANK_STRIDE;
233 }
234 *reg += ((pin_num / pins_per_reg) * 4);
235 *bit = pin_num % pins_per_reg;
236
237 return 0;
238 }
239
rv1108_set_schmitt(struct rockchip_pin_bank * bank,int pin_num,int enable)240 static int rv1108_set_schmitt(struct rockchip_pin_bank *bank,
241 int pin_num, int enable)
242 {
243 struct regmap *regmap;
244 int reg;
245 u8 bit;
246 u32 data;
247
248 rv1108_calc_schmitt_reg_and_bit(bank, pin_num, ®map, ®, &bit);
249 /* enable the write to the equivalent lower bits */
250 data = BIT(bit + 16) | (enable << bit);
251
252 return regmap_write(regmap, reg, data);
253 }
254
255 static struct rockchip_pin_bank rv1108_pin_banks[] = {
256 PIN_BANK_IOMUX_FLAGS(0, 32, "gpio0", IOMUX_SOURCE_PMU,
257 IOMUX_SOURCE_PMU,
258 IOMUX_SOURCE_PMU,
259 IOMUX_SOURCE_PMU),
260 PIN_BANK_IOMUX_FLAGS(1, 32, "gpio1", 0, 0, 0, 0),
261 PIN_BANK_IOMUX_FLAGS(2, 32, "gpio2", 0, 0, 0, 0),
262 PIN_BANK_IOMUX_FLAGS(3, 32, "gpio3", 0, 0, 0, 0),
263 };
264
265 static struct rockchip_pin_ctrl rv1108_pin_ctrl = {
266 .pin_banks = rv1108_pin_banks,
267 .nr_banks = ARRAY_SIZE(rv1108_pin_banks),
268 .grf_mux_offset = 0x10,
269 .pmu_mux_offset = 0x0,
270 .iomux_recalced = rv1108_mux_recalced_data,
271 .niomux_recalced = ARRAY_SIZE(rv1108_mux_recalced_data),
272 .set_mux = rv1108_set_mux,
273 .set_pull = rv1108_set_pull,
274 .set_drive = rv1108_set_drive,
275 .set_schmitt = rv1108_set_schmitt,
276 };
277
278 static const struct udevice_id rv1108_pinctrl_ids[] = {
279 {
280 .compatible = "rockchip,rv1108-pinctrl",
281 .data = (ulong)&rv1108_pin_ctrl
282 },
283 { }
284 };
285
286 U_BOOT_DRIVER(pinctrl_rv1108) = {
287 .name = "pinctrl_rv1108",
288 .id = UCLASS_PINCTRL,
289 .of_match = rv1108_pinctrl_ids,
290 .priv_auto_alloc_size = sizeof(struct rockchip_pinctrl_priv),
291 .ops = &rockchip_pinctrl_ops,
292 #if !CONFIG_IS_ENABLED(OF_PLATDATA)
293 .bind = dm_scan_fdt_dev,
294 #endif
295 .probe = rockchip_pinctrl_probe,
296 };
297