drivers/pinctrl/rockchip/pinctrl-rk3399.c

   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_route_data rk3399_mux_route_data[] = {
  15         {
  16                 /* uart2dbga_rx */
  17                 .bank_num = 4,
  18                 .pin = 8,
  19                 .func = 2,
  20                 .route_offset = 0xe21c,
  21                 .route_val = BIT(16 + 10) | BIT(16 + 11),
  22         }, {
  23                 /* uart2dbgb_rx */
  24                 .bank_num = 4,
  25                 .pin = 16,
  26                 .func = 2,
  27                 .route_offset = 0xe21c,
  28                 .route_val = BIT(16 + 10) | BIT(16 + 11) | BIT(10),
  29         }, {
  30                 /* uart2dbgc_rx */
  31                 .bank_num = 4,
  32                 .pin = 19,
  33                 .func = 1,
  34                 .route_offset = 0xe21c,
  35                 .route_val = BIT(16 + 10) | BIT(16 + 11) | BIT(11),
  36         }, {
  37                 /* pcie_clkreqn */
  38                 .bank_num = 2,
  39                 .pin = 26,
  40                 .func = 2,
  41                 .route_offset = 0xe21c,
  42                 .route_val = BIT(16 + 14),
  43         }, {
  44                 /* pcie_clkreqnb */
  45                 .bank_num = 4,
  46                 .pin = 24,
  47                 .func = 1,
  48                 .route_offset = 0xe21c,
  49                 .route_val = BIT(16 + 14) | BIT(14),
  50         },
  51 };
  52
  53 static int rk3399_set_mux(struct rockchip_pin_bank *bank, int pin, int mux)
  54 {
  55         struct rockchip_pinctrl_priv *priv = bank->priv;
  56         int iomux_num = (pin / 8);
  57         struct regmap *regmap;
  58         int reg, ret, mask, mux_type;
  59         u8 bit;
  60         u32 data, route_reg, route_val;
  61
  62         regmap = (bank->iomux[iomux_num].type & IOMUX_SOURCE_PMU)
  63                                 ? priv->regmap_pmu : priv->regmap_base;
  64
  65         /* get basic quadrupel of mux registers and the correct reg inside */
  66         mux_type = bank->iomux[iomux_num].type;
  67         reg = bank->iomux[iomux_num].offset;
  68         reg += rockchip_get_mux_data(mux_type, pin, &bit, &mask);
  69
  70         if (bank->route_mask & BIT(pin)) {
  71                 if (rockchip_get_mux_route(bank, pin, mux, &route_reg,
  72                                            &route_val)) {
  73                         ret = regmap_write(regmap, route_reg, route_val);
  74                         if (ret)
  75                                 return ret;
  76                 }
  77         }
  78
  79         data = (mask << (bit + 16));
  80         data |= (mux & mask) << bit;
  81         ret = regmap_write(regmap, reg, data);
  82
  83         return ret;
  84 }
  85
  86 #define RK3399_PULL_GRF_OFFSET          0xe040
  87 #define RK3399_PULL_PMU_OFFSET          0x40
  88
  89 static void rk3399_calc_pull_reg_and_bit(struct rockchip_pin_bank *bank,
  90                                          int pin_num, struct regmap **regmap,
  91                                          int *reg, u8 *bit)
  92 {
  93         struct rockchip_pinctrl_priv *priv = bank->priv;
  94
  95         /* The bank0:16 and bank1:32 pins are located in PMU */
  96         if (bank->bank_num == 0 || bank->bank_num == 1) {
  97                 *regmap = priv->regmap_pmu;
  98                 *reg = RK3399_PULL_PMU_OFFSET;
  99
 100                 *reg += bank->bank_num * ROCKCHIP_PULL_BANK_STRIDE;
 101         } else {
 102                 *regmap = priv->regmap_base;
 103                 *reg = RK3399_PULL_GRF_OFFSET;
 104
 105                 /* correct the offset, as we're starting with the 3rd bank */
 106                 *reg -= 0x20;
 107                 *reg += bank->bank_num * ROCKCHIP_PULL_BANK_STRIDE;
 108         }
 109
 110         *reg += ((pin_num / ROCKCHIP_PULL_PINS_PER_REG) * 4);
 111
 112         *bit = (pin_num % ROCKCHIP_PULL_PINS_PER_REG);
 113         *bit *= ROCKCHIP_PULL_BITS_PER_PIN;
 114 }
 115
 116 static int rk3399_set_pull(struct rockchip_pin_bank *bank,
 117                            int pin_num, int pull)
 118 {
 119         struct regmap *regmap;
 120         int reg, ret;
 121         u8 bit, type;
 122         u32 data;
 123
 124         if (pull == PIN_CONFIG_BIAS_PULL_PIN_DEFAULT)
 125                 return -ENOTSUPP;
 126
 127         rk3399_calc_pull_reg_and_bit(bank, pin_num, &regmap, &reg, &bit);
 128         type = bank->pull_type[pin_num / 8];
 129         ret = rockchip_translate_pull_value(type, pull);
 130         if (ret < 0) {
 131                 debug("unsupported pull setting %d\n", pull);
 132                 return ret;
 133         }
 134
 135         /* enable the write to the equivalent lower bits */
 136         data = ((1 << ROCKCHIP_PULL_BITS_PER_PIN) - 1) << (bit + 16);
 137         data |= (ret << bit);
 138         ret = regmap_write(regmap, reg, data);
 139
 140         return ret;
 141 }
 142
 143 static void rk3399_calc_drv_reg_and_bit(struct rockchip_pin_bank *bank,
 144                                         int pin_num, struct regmap **regmap,
 145                                         int *reg, u8 *bit)
 146 {
 147         struct rockchip_pinctrl_priv *priv = bank->priv;
 148         int drv_num = (pin_num / 8);
 149
 150         /*  The bank0:16 and bank1:32 pins are located in PMU */
 151         if (bank->bank_num == 0 || bank->bank_num == 1)
 152                 *regmap = priv->regmap_pmu;
 153         else
 154                 *regmap = priv->regmap_base;
 155
 156         *reg = bank->drv[drv_num].offset;
 157         if (bank->drv[drv_num].drv_type == DRV_TYPE_IO_1V8_3V0_AUTO ||
 158             bank->drv[drv_num].drv_type == DRV_TYPE_IO_3V3_ONLY)
 159                 *bit = (pin_num % 8) * 3;
 160         else
 161                 *bit = (pin_num % 8) * 2;
 162 }
 163
 164 static int rk3399_set_drive(struct rockchip_pin_bank *bank,
 165                             int pin_num, int strength)
 166 {
 167         struct regmap *regmap;
 168         int reg, ret;
 169         u32 data, rmask_bits, temp;
 170         u8 bit;
 171         int drv_type = bank->drv[pin_num / 8].drv_type;
 172
 173         rk3399_calc_drv_reg_and_bit(bank, pin_num, &regmap, &reg, &bit);
 174         ret = rockchip_translate_drive_value(drv_type, strength);
 175         if (ret < 0) {
 176                 debug("unsupported driver strength %d\n", strength);
 177                 return ret;
 178         }
 179
 180         switch (drv_type) {
 181         case DRV_TYPE_IO_1V8_3V0_AUTO:
 182         case DRV_TYPE_IO_3V3_ONLY:
 183                 rmask_bits = ROCKCHIP_DRV_3BITS_PER_PIN;
 184                 switch (bit) {
 185                 case 0 ... 12:
 186                         /* regular case, nothing to do */
 187                         break;
 188                 case 15:
 189                         /*
 190                          * drive-strength offset is special, as it is spread
 191                          * over 2 registers, the bit data[15] contains bit 0
 192                          * of the value while temp[1:0] contains bits 2 and 1
 193                          */
 194                         data = (ret & 0x1) << 15;
 195                         temp = (ret >> 0x1) & 0x3;
 196
 197                         data |= BIT(31);
 198                         ret = regmap_write(regmap, reg, data);
 199                         if (ret)
 200                                 return ret;
 201
 202                         temp |= (0x3 << 16);
 203                         reg += 0x4;
 204                         ret = regmap_write(regmap, reg, temp);
 205
 206                         return ret;
 207                 case 18 ... 21:
 208                         /* setting fully enclosed in the second register */
 209                         reg += 4;
 210                         bit -= 16;
 211                         break;
 212                 default:
 213                         debug("unsupported bit: %d for pinctrl drive type: %d\n",
 214                               bit, drv_type);
 215                         return -EINVAL;
 216                 }
 217                 break;
 218         case DRV_TYPE_IO_DEFAULT:
 219         case DRV_TYPE_IO_1V8_OR_3V0:
 220         case DRV_TYPE_IO_1V8_ONLY:
 221                 rmask_bits = ROCKCHIP_DRV_BITS_PER_PIN;
 222                 break;
 223         default:
 224                 debug("unsupported pinctrl drive type: %d\n",
 225                       drv_type);
 226                 return -EINVAL;
 227         }
 228
 229         /* enable the write to the equivalent lower bits */
 230         data = ((1 << rmask_bits) - 1) << (bit + 16);
 231         data |= (ret << bit);
 232         ret = regmap_write(regmap, reg, data);
 233
 234         return ret;
 235 }
 236
 237 static struct rockchip_pin_bank rk3399_pin_banks[] = {
 238         PIN_BANK_IOMUX_FLAGS_DRV_FLAGS_OFFSET_PULL_FLAGS(0, 32, "gpio0",
 239                                                          IOMUX_SOURCE_PMU,
 240                                                          IOMUX_SOURCE_PMU,
 241                                                          IOMUX_SOURCE_PMU,
 242                                                          IOMUX_SOURCE_PMU,
 243                                                          DRV_TYPE_IO_1V8_ONLY,
 244                                                          DRV_TYPE_IO_1V8_ONLY,
 245                                                          DRV_TYPE_IO_DEFAULT,
 246                                                          DRV_TYPE_IO_DEFAULT,
 247                                                          0x80,
 248                                                          0x88,
 249                                                          -1,
 250                                                          -1,
 251                                                          PULL_TYPE_IO_1V8_ONLY,
 252                                                          PULL_TYPE_IO_1V8_ONLY,
 253                                                          PULL_TYPE_IO_DEFAULT,
 254                                                          PULL_TYPE_IO_DEFAULT
 255                                                         ),
 256         PIN_BANK_IOMUX_DRV_FLAGS_OFFSET(1, 32, "gpio1", IOMUX_SOURCE_PMU,
 257                                         IOMUX_SOURCE_PMU,
 258                                         IOMUX_SOURCE_PMU,
 259                                         IOMUX_SOURCE_PMU,
 260                                         DRV_TYPE_IO_1V8_OR_3V0,
 261                                         DRV_TYPE_IO_1V8_OR_3V0,
 262                                         DRV_TYPE_IO_1V8_OR_3V0,
 263                                         DRV_TYPE_IO_1V8_OR_3V0,
 264                                         0xa0,
 265                                         0xa8,
 266                                         0xb0,
 267                                         0xb8
 268                                         ),
 269         PIN_BANK_DRV_FLAGS_PULL_FLAGS(2, 32, "gpio2", DRV_TYPE_IO_1V8_OR_3V0,
 270                                       DRV_TYPE_IO_1V8_OR_3V0,
 271                                       DRV_TYPE_IO_1V8_ONLY,
 272                                       DRV_TYPE_IO_1V8_ONLY,
 273                                       PULL_TYPE_IO_DEFAULT,
 274                                       PULL_TYPE_IO_DEFAULT,
 275                                       PULL_TYPE_IO_1V8_ONLY,
 276                                       PULL_TYPE_IO_1V8_ONLY
 277                                       ),
 278         PIN_BANK_DRV_FLAGS(3, 32, "gpio3", DRV_TYPE_IO_3V3_ONLY,
 279                            DRV_TYPE_IO_3V3_ONLY,
 280                            DRV_TYPE_IO_3V3_ONLY,
 281                            DRV_TYPE_IO_1V8_OR_3V0
 282                            ),
 283         PIN_BANK_DRV_FLAGS(4, 32, "gpio4", DRV_TYPE_IO_1V8_OR_3V0,
 284                            DRV_TYPE_IO_1V8_3V0_AUTO,
 285                            DRV_TYPE_IO_1V8_OR_3V0,
 286                            DRV_TYPE_IO_1V8_OR_3V0
 287                            ),
 288 };
 289
 290 static struct rockchip_pin_ctrl rk3399_pin_ctrl = {
 291         .pin_banks              = rk3399_pin_banks,
 292         .nr_banks               = ARRAY_SIZE(rk3399_pin_banks),
 293         .label                  = "RK3399-GPIO",
 294         .type                   = RK3399,
 295         .grf_mux_offset         = 0xe000,
 296         .pmu_mux_offset         = 0x0,
 297         .grf_drv_offset         = 0xe100,
 298         .pmu_drv_offset         = 0x80,
 299         .iomux_routes           = rk3399_mux_route_data,
 300         .niomux_routes          = ARRAY_SIZE(rk3399_mux_route_data),
 301         .set_mux                = rk3399_set_mux,
 302         .set_pull               = rk3399_set_pull,
 303         .set_drive              = rk3399_set_drive,
 304 };
 305
 306 static const struct udevice_id rk3399_pinctrl_ids[] = {
 307         {
 308                 .compatible = "rockchip,rk3399-pinctrl",
 309                 .data = (ulong)&rk3399_pin_ctrl
 310         },
 311         { }
 312 };
 313
 314 U_BOOT_DRIVER(pinctrl_rk3399) = {
 315         .name           = "rockchip_rk3399_pinctrl",
 316         .id             = UCLASS_PINCTRL,
 317         .of_match       = rk3399_pinctrl_ids,
 318         .priv_auto_alloc_size = sizeof(struct rockchip_pinctrl_priv),
 319         .ops            = &rockchip_pinctrl_ops,
 320 #if !CONFIG_IS_ENABLED(OF_PLATDATA)
 321         .bind           = dm_scan_fdt_dev,
 322 #endif
 323         .probe          = rockchip_pinctrl_probe,
 324 };