drivers/pinctrl/rockchip/pinctrl_rk322x.c

   1 /*
   2  * (C) Copyright 2017 Rockchip Electronics Co., Ltd.
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0+
   5  */
   6
   7 #include <common.h>
   8 #include <dm.h>
   9 #include <errno.h>
  10 #include <syscon.h>
  11 #include <asm/io.h>
  12 #include <asm/arch/clock.h>
  13 #include <asm/arch/grf_rk322x.h>
  14 #include <asm/arch/hardware.h>
  15 #include <asm/arch/periph.h>
  16 #include <dm/pinctrl.h>
  17
  18 DECLARE_GLOBAL_DATA_PTR;
  19
  20 struct rk322x_pinctrl_priv {
  21         struct rk322x_grf *grf;
  22 };
  23
  24 static void pinctrl_rk322x_pwm_config(struct rk322x_grf *grf, int pwm_id)
  25 {
  26         u32 mux_con = readl(&grf->con_iomux);
  27
  28         switch (pwm_id) {
  29         case PERIPH_ID_PWM0:
  30                 if (mux_con & CON_IOMUX_PWM0SEL_MASK)
  31                         rk_clrsetreg(&grf->gpio3c_iomux, GPIO3C5_MASK,
  32                                      GPIO3C5_PWM10 << GPIO3C5_SHIFT);
  33                 else
  34                         rk_clrsetreg(&grf->gpio0d_iomux, GPIO0D2_MASK,
  35                                      GPIO0D2_PWM0 << GPIO0D2_SHIFT);
  36                 break;
  37         case PERIPH_ID_PWM1:
  38                 if (mux_con & CON_IOMUX_PWM1SEL_MASK)
  39                         rk_clrsetreg(&grf->gpio0d_iomux, GPIO0D6_MASK,
  40                                      GPIO0D6_PWM11 << GPIO0D6_SHIFT);
  41                 else
  42                         rk_clrsetreg(&grf->gpio0d_iomux, GPIO0D3_MASK,
  43                                      GPIO0D3_PWM1 << GPIO0D3_SHIFT);
  44                 break;
  45         case PERIPH_ID_PWM2:
  46                 if (mux_con & CON_IOMUX_PWM2SEL_MASK)
  47                         rk_clrsetreg(&grf->gpio1b_iomux, GPIO1B4_MASK,
  48                                      GPIO1B4_PWM12 << GPIO1B4_SHIFT);
  49                 else
  50                         rk_clrsetreg(&grf->gpio0d_iomux, GPIO0D4_MASK,
  51                                      GPIO0D4_PWM2 << GPIO0D4_SHIFT);
  52                 break;
  53         case PERIPH_ID_PWM3:
  54                 if (mux_con & CON_IOMUX_PWM3SEL_MASK)
  55                         rk_clrsetreg(&grf->gpio1b_iomux, GPIO1B3_MASK,
  56                                      GPIO1B3_PWM13 << GPIO1B3_SHIFT);
  57                 else
  58                         rk_clrsetreg(&grf->gpio3d_iomux, GPIO3D2_MASK,
  59                                      GPIO3D2_PWM3 << GPIO3D2_SHIFT);
  60                 break;
  61         default:
  62                 debug("pwm id = %d iomux error!\n", pwm_id);
  63                 break;
  64         }
  65 }
  66
  67 static void pinctrl_rk322x_i2c_config(struct rk322x_grf *grf, int i2c_id)
  68 {
  69         switch (i2c_id) {
  70         case PERIPH_ID_I2C0:
  71                 rk_clrsetreg(&grf->gpio0a_iomux,
  72                              GPIO0A1_MASK | GPIO0A0_MASK,
  73                              GPIO0A1_I2C0_SDA << GPIO0A1_SHIFT |
  74                              GPIO0A0_I2C0_SCL << GPIO0A0_SHIFT);
  75
  76                 break;
  77         case PERIPH_ID_I2C1:
  78                 rk_clrsetreg(&grf->gpio0a_iomux,
  79                              GPIO0A3_MASK | GPIO0A2_MASK,
  80                              GPIO0A3_I2C1_SDA << GPIO0A3_SHIFT |
  81                              GPIO0A2_I2C1_SCL << GPIO0A2_SHIFT);
  82                 break;
  83         case PERIPH_ID_I2C2:
  84                 rk_clrsetreg(&grf->gpio2c_iomux,
  85                              GPIO2C5_MASK | GPIO2C4_MASK,
  86                              GPIO2C5_I2C2_SCL << GPIO2C5_SHIFT |
  87                              GPIO2C4_I2C2_SDA << GPIO2C4_SHIFT);
  88                 break;
  89         case PERIPH_ID_I2C3:
  90                 rk_clrsetreg(&grf->gpio0a_iomux,
  91                              GPIO0A7_MASK | GPIO0A6_MASK,
  92                              GPIO0A7_I2C3_SDA << GPIO0A7_SHIFT |
  93                              GPIO0A6_I2C3_SCL << GPIO0A6_SHIFT);
  94
  95                 break;
  96         }
  97 }
  98
  99 static void pinctrl_rk322x_spi_config(struct rk322x_grf *grf, int cs)
 100 {
 101         switch (cs) {
 102         case 0:
 103                 rk_clrsetreg(&grf->gpio0b_iomux, GPIO0B6_MASK,
 104                              GPIO0B6_SPI_CSN0 << GPIO0B6_SHIFT);
 105                 break;
 106         case 1:
 107                 rk_clrsetreg(&grf->gpio1b_iomux, GPIO1B4_MASK,
 108                              GPIO1B4_SPI_CSN1 << GPIO1B4_SHIFT);
 109                 break;
 110         }
 111         rk_clrsetreg(&grf->gpio0b_iomux,
 112                      GPIO0B1_MASK | GPIO0B3_MASK | GPIO0B5_MASK,
 113                      GPIO0B5_SPI_RXD << GPIO0B5_SHIFT |
 114                      GPIO0B3_SPI_TXD << GPIO0B3_SHIFT |
 115                      GPIO0B1_SPI_CLK << GPIO0B1_SHIFT);
 116 }
 117
 118 static void pinctrl_rk322x_uart_config(struct rk322x_grf *grf, int uart_id)
 119 {
 120         u32 mux_con = readl(&grf->con_iomux);
 121
 122         switch (uart_id) {
 123         case PERIPH_ID_UART1:
 124                 if (!(mux_con & CON_IOMUX_UART1SEL_MASK))
 125                         rk_clrsetreg(&grf->gpio1b_iomux,
 126                                      GPIO1B1_MASK | GPIO1B2_MASK,
 127                                      GPIO1B1_UART1_SOUT << GPIO1B1_SHIFT |
 128                                      GPIO1B2_UART1_SIN << GPIO1B2_SHIFT);
 129                 break;
 130         case PERIPH_ID_UART2:
 131                 if (mux_con & CON_IOMUX_UART2SEL_MASK)
 132                         rk_clrsetreg(&grf->gpio1b_iomux,
 133                                      GPIO1B1_MASK | GPIO1B2_MASK,
 134                                      GPIO1B1_UART21_SOUT << GPIO1B1_SHIFT |
 135                                      GPIO1B2_UART21_SIN << GPIO1B2_SHIFT);
 136                 else
 137                         rk_clrsetreg(&grf->gpio1c_iomux,
 138                                      GPIO1C3_MASK | GPIO1C2_MASK,
 139                                      GPIO1C3_UART2_SIN << GPIO1C3_SHIFT |
 140                                      GPIO1C2_UART2_SOUT << GPIO1C2_SHIFT);
 141                 break;
 142         }
 143 }
 144
 145 static void pinctrl_rk322x_sdmmc_config(struct rk322x_grf *grf, int mmc_id)
 146 {
 147         switch (mmc_id) {
 148         case PERIPH_ID_EMMC:
 149                 rk_clrsetreg(&grf->gpio1d_iomux, 0xffff,
 150                              GPIO1D7_EMMC_D7 << GPIO1D7_SHIFT |
 151                              GPIO1D6_EMMC_D6 << GPIO1D6_SHIFT |
 152                              GPIO1D5_EMMC_D5 << GPIO1D5_SHIFT |
 153                              GPIO1D4_EMMC_D4 << GPIO1D4_SHIFT |
 154                              GPIO1D3_EMMC_D3 << GPIO1D3_SHIFT |
 155                              GPIO1D2_EMMC_D2 << GPIO1D2_SHIFT |
 156                              GPIO1D1_EMMC_D1 << GPIO1D1_SHIFT |
 157                              GPIO1D0_EMMC_D0 << GPIO1D0_SHIFT);
 158                 rk_clrsetreg(&grf->gpio2a_iomux,
 159                              GPIO2A5_MASK | GPIO2A7_MASK,
 160                              GPIO2A5_EMMC_PWREN << GPIO2A5_SHIFT |
 161                              GPIO2A7_EMMC_CLKOUT << GPIO2A7_SHIFT);
 162                 rk_clrsetreg(&grf->gpio1c_iomux,
 163                              GPIO1C6_MASK | GPIO1C7_MASK,
 164                              GPIO1C6_EMMC_CMD << GPIO1C6_SHIFT |
 165                              GPIO1C7_EMMC_RSTNOUT << GPIO1C6_SHIFT);
 166                 break;
 167         case PERIPH_ID_SDCARD:
 168                 rk_clrsetreg(&grf->gpio1b_iomux,
 169                              GPIO1B6_MASK | GPIO1B7_MASK,
 170                              GPIO1B6_SDMMC_PWREN << GPIO1B6_SHIFT |
 171                              GPIO1B7_SDMMC_CMD << GPIO1B6_SHIFT);
 172                 rk_clrsetreg(&grf->gpio1c_iomux, 0xfff,
 173                              GPIO1C5_SDMMC_D3 << GPIO1C5_SHIFT |
 174                              GPIO1C4_SDMMC_D2 << GPIO1C4_SHIFT |
 175                              GPIO1C3_SDMMC_D1 << GPIO1C3_SHIFT |
 176                              GPIO1C2_SDMMC_D0 << GPIO1C2_SHIFT |
 177                              GPIO1C1_SDMMC_DETN << GPIO1C1_SHIFT |
 178                              GPIO1C0_SDMMC_CLKOUT << GPIO1C0_SHIFT);
 179                 break;
 180         }
 181 }
 182
 183 static int rk322x_pinctrl_request(struct udevice *dev, int func, int flags)
 184 {
 185         struct rk322x_pinctrl_priv *priv = dev_get_priv(dev);
 186
 187         debug("%s: func=%x, flags=%x\n", __func__, func, flags);
 188         switch (func) {
 189         case PERIPH_ID_PWM0:
 190         case PERIPH_ID_PWM1:
 191         case PERIPH_ID_PWM2:
 192         case PERIPH_ID_PWM3:
 193                 pinctrl_rk322x_pwm_config(priv->grf, func);
 194                 break;
 195         case PERIPH_ID_I2C0:
 196         case PERIPH_ID_I2C1:
 197         case PERIPH_ID_I2C2:
 198                 pinctrl_rk322x_i2c_config(priv->grf, func);
 199                 break;
 200         case PERIPH_ID_SPI0:
 201                 pinctrl_rk322x_spi_config(priv->grf, flags);
 202                 break;
 203         case PERIPH_ID_UART0:
 204         case PERIPH_ID_UART1:
 205         case PERIPH_ID_UART2:
 206                 pinctrl_rk322x_uart_config(priv->grf, func);
 207                 break;
 208         case PERIPH_ID_SDMMC0:
 209         case PERIPH_ID_SDMMC1:
 210                 pinctrl_rk322x_sdmmc_config(priv->grf, func);
 211                 break;
 212         default:
 213                 return -EINVAL;
 214         }
 215
 216         return 0;
 217 }
 218
 219 static int rk322x_pinctrl_get_periph_id(struct udevice *dev,
 220                                         struct udevice *periph)
 221 {
 222         u32 cell[3];
 223         int ret;
 224
 225         ret = fdtdec_get_int_array(gd->fdt_blob, dev_of_offset(periph),
 226                                    "interrupts", cell, ARRAY_SIZE(cell));
 227         if (ret < 0)
 228                 return -EINVAL;
 229
 230         switch (cell[1]) {
 231         case 12:
 232                 return PERIPH_ID_SDCARD;
 233         case 14:
 234                 return PERIPH_ID_EMMC;
 235         case 36:
 236                 return PERIPH_ID_I2C0;
 237         case 37:
 238                 return PERIPH_ID_I2C1;
 239         case 38:
 240                 return PERIPH_ID_I2C2;
 241         case 49:
 242                 return PERIPH_ID_SPI0;
 243         case 50:
 244                 return PERIPH_ID_PWM0;
 245         case 55:
 246                 return PERIPH_ID_UART0;
 247         case 56:
 248                 return PERIPH_ID_UART1;
 249         case 57:
 250                 return PERIPH_ID_UART2;
 251         }
 252         return -ENOENT;
 253 }
 254
 255 static int rk322x_pinctrl_set_state_simple(struct udevice *dev,
 256                                            struct udevice *periph)
 257 {
 258         int func;
 259
 260         func = rk322x_pinctrl_get_periph_id(dev, periph);
 261         if (func < 0)
 262                 return func;
 263         return rk322x_pinctrl_request(dev, func, 0);
 264 }
 265
 266 static struct pinctrl_ops rk322x_pinctrl_ops = {
 267         .set_state_simple       = rk322x_pinctrl_set_state_simple,
 268         .request        = rk322x_pinctrl_request,
 269         .get_periph_id  = rk322x_pinctrl_get_periph_id,
 270 };
 271
 272 static int rk322x_pinctrl_probe(struct udevice *dev)
 273 {
 274         struct rk322x_pinctrl_priv *priv = dev_get_priv(dev);
 275
 276         priv->grf = syscon_get_first_range(ROCKCHIP_SYSCON_GRF);
 277         debug("%s: grf=%p\n", __func__, priv->grf);
 278         return 0;
 279 }
 280
 281 static const struct udevice_id rk322x_pinctrl_ids[] = {
 282         { .compatible = "rockchip,rk3228-pinctrl" },
 283         { }
 284 };
 285
 286 U_BOOT_DRIVER(pinctrl_rk3228) = {
 287         .name           = "pinctrl_rk3228",
 288         .id             = UCLASS_PINCTRL,
 289         .of_match       = rk322x_pinctrl_ids,
 290         .priv_auto_alloc_size = sizeof(struct rk322x_pinctrl_priv),
 291         .ops            = &rk322x_pinctrl_ops,
 292         .bind           = dm_scan_fdt_dev,
 293         .probe          = rk322x_pinctrl_probe,
 294 };