drivers/pinctrl/rockchip/pinctrl_rk3036.c

   1 /*
   2  * Pinctrl driver for Rockchip 3036 SoCs
   3  * (C) Copyright 2015 Rockchip Electronics Co., Ltd
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7
   8 #include <common.h>
   9 #include <dm.h>
  10 #include <errno.h>
  11 #include <syscon.h>
  12 #include <asm/io.h>
  13 #include <asm/arch/clock.h>
  14 #include <asm/arch/grf_rk3036.h>
  15 #include <asm/arch/hardware.h>
  16 #include <asm/arch/periph.h>
  17 #include <dm/pinctrl.h>
  18
  19 DECLARE_GLOBAL_DATA_PTR;
  20
  21 struct rk3036_pinctrl_priv {
  22         struct rk3036_grf *grf;
  23 };
  24
  25 static void pinctrl_rk3036_pwm_config(struct rk3036_grf *grf, int pwm_id)
  26 {
  27         switch (pwm_id) {
  28         case PERIPH_ID_PWM0:
  29                 rk_clrsetreg(&grf->gpio0d_iomux, GPIO0D2_MASK << GPIO0D2_SHIFT,
  30                              GPIO0D2_PWM0 << GPIO0D2_SHIFT);
  31                 break;
  32         case PERIPH_ID_PWM1:
  33                 rk_clrsetreg(&grf->gpio0a_iomux, GPIO0A0_MASK << GPIO0A0_SHIFT,
  34                              GPIO0A0_PWM1 << GPIO0A0_SHIFT);
  35                 break;
  36         case PERIPH_ID_PWM2:
  37                 rk_clrsetreg(&grf->gpio0a_iomux, GPIO0A1_MASK << GPIO0A1_SHIFT,
  38                              GPIO0A1_PWM2 << GPIO0A1_SHIFT);
  39                 break;
  40         case PERIPH_ID_PWM3:
  41                 rk_clrsetreg(&grf->gpio0a_iomux, GPIO0D3_MASK << GPIO0D3_SHIFT,
  42                              GPIO0D3_PWM3 << GPIO0D3_SHIFT);
  43                 break;
  44         default:
  45                 debug("pwm id = %d iomux error!\n", pwm_id);
  46                 break;
  47         }
  48 }
  49
  50 static void pinctrl_rk3036_i2c_config(struct rk3036_grf *grf, int i2c_id)
  51 {
  52         switch (i2c_id) {
  53         case PERIPH_ID_I2C0:
  54                 rk_clrsetreg(&grf->gpio0a_iomux,
  55                              GPIO0A1_MASK << GPIO0A1_SHIFT |
  56                              GPIO0A0_MASK << GPIO0A0_SHIFT,
  57                              GPIO0A1_I2C0_SDA << GPIO0A1_SHIFT |
  58                              GPIO0A0_I2C0_SCL << GPIO0A0_SHIFT);
  59
  60                 break;
  61         case PERIPH_ID_I2C1:
  62                 rk_clrsetreg(&grf->gpio0a_iomux,
  63                              GPIO0A3_MASK << GPIO0A3_SHIFT |
  64                              GPIO0A2_MASK << GPIO0A2_SHIFT,
  65                              GPIO0A3_I2C1_SDA << GPIO0A3_SHIFT |
  66                              GPIO0A2_I2C1_SCL << GPIO0A2_SHIFT);
  67                 break;
  68         case PERIPH_ID_I2C2:
  69                 rk_clrsetreg(&grf->gpio2c_iomux,
  70                              GPIO2C5_MASK << GPIO2C5_SHIFT |
  71                              GPIO2C4_MASK << GPIO2C4_SHIFT,
  72                              GPIO2C5_I2C2_SCL << GPIO2C5_SHIFT |
  73                              GPIO2C4_I2C2_SDA << GPIO2C4_SHIFT);
  74
  75                 break;
  76         }
  77 }
  78
  79 static void pinctrl_rk3036_spi_config(struct rk3036_grf *grf, int cs)
  80 {
  81         switch (cs) {
  82         case 0:
  83                 rk_clrsetreg(&grf->gpio1d_iomux,
  84                              GPIO1D6_MASK << GPIO1D6_SHIFT,
  85                              GPIO1D6_SPI_CSN0 << GPIO1D6_SHIFT);
  86                 break;
  87         case 1:
  88                 rk_clrsetreg(&grf->gpio1d_iomux,
  89                              GPIO1D7_MASK << GPIO1D7_SHIFT,
  90                              GPIO1D7_SPI_CSN1 << GPIO1D7_SHIFT);
  91                 break;
  92         }
  93         rk_clrsetreg(&grf->gpio1d_iomux,
  94                      GPIO1D5_MASK << GPIO1D5_SHIFT |
  95                      GPIO1D4_MASK << GPIO1D4_SHIFT,
  96                      GPIO1D5_SPI_TXD << GPIO1D5_SHIFT |
  97                      GPIO1D4_SPI_RXD << GPIO1D4_SHIFT);
  98
  99         rk_clrsetreg(&grf->gpio2a_iomux,
 100                      GPIO2A0_MASK << GPIO2A0_SHIFT,
 101                      GPIO2A0_SPI_CLK << GPIO2A0_SHIFT);
 102 }
 103
 104 static void pinctrl_rk3036_uart_config(struct rk3036_grf *grf, int uart_id)
 105 {
 106         switch (uart_id) {
 107         case PERIPH_ID_UART0:
 108                 rk_clrsetreg(&grf->gpio0c_iomux,
 109                              GPIO0C3_MASK << GPIO0C3_SHIFT |
 110                              GPIO0C2_MASK << GPIO0C2_SHIFT |
 111                              GPIO0C1_MASK << GPIO0C1_SHIFT |
 112                              GPIO0C0_MASK << GPIO0C0_SHIFT,
 113                              GPIO0C3_UART0_CTSN << GPIO0C3_SHIFT |
 114                              GPIO0C2_UART0_RTSN << GPIO0C2_SHIFT |
 115                              GPIO0C1_UART0_SIN << GPIO0C1_SHIFT |
 116                              GPIO0C0_UART0_SOUT << GPIO0C0_SHIFT);
 117                 break;
 118         case PERIPH_ID_UART1:
 119                 rk_clrsetreg(&grf->gpio2c_iomux,
 120                              GPIO2C7_MASK << GPIO2C7_SHIFT |
 121                              GPIO2C6_MASK << GPIO2C6_SHIFT,
 122                              GPIO2C7_UART1_SOUT << GPIO2C7_SHIFT |
 123                              GPIO2C6_UART1_SIN << GPIO2C6_SHIFT);
 124                 break;
 125         case PERIPH_ID_UART2:
 126                 rk_clrsetreg(&grf->gpio1c_iomux,
 127                              GPIO1C3_MASK << GPIO1C3_SHIFT |
 128                              GPIO1C2_MASK << GPIO1C2_SHIFT,
 129                              GPIO1C3_UART2_SOUT << GPIO1C3_SHIFT |
 130                              GPIO1C2_UART2_SIN << GPIO1C2_SHIFT);
 131                 break;
 132         }
 133 }
 134
 135 static void pinctrl_rk3036_sdmmc_config(struct rk3036_grf *grf, int mmc_id)
 136 {
 137         switch (mmc_id) {
 138         case PERIPH_ID_EMMC:
 139                 rk_clrsetreg(&grf->gpio1d_iomux, 0xffff,
 140                              GPIO1D7_EMMC_D7 << GPIO1D7_SHIFT |
 141                              GPIO1D6_EMMC_D6 << GPIO1D6_SHIFT |
 142                              GPIO1D5_EMMC_D5 << GPIO1D5_SHIFT |
 143                              GPIO1D4_EMMC_D4 << GPIO1D4_SHIFT |
 144                              GPIO1D3_EMMC_D3 << GPIO1D3_SHIFT |
 145                              GPIO1D2_EMMC_D2 << GPIO1D2_SHIFT |
 146                              GPIO1D1_EMMC_D1 << GPIO1D1_SHIFT |
 147                              GPIO1D0_EMMC_D0 << GPIO1D0_SHIFT);
 148                 rk_clrsetreg(&grf->gpio2a_iomux,
 149                              GPIO2A4_MASK << GPIO2A4_SHIFT |
 150                              GPIO2A1_MASK << GPIO2A1_SHIFT,
 151                              GPIO2A4_EMMC_CMD << GPIO2A4_SHIFT |
 152                              GPIO2A1_EMMC_CLKOUT << GPIO2A1_SHIFT);
 153                 break;
 154         case PERIPH_ID_SDCARD:
 155                 rk_clrsetreg(&grf->gpio1c_iomux, 0xffff,
 156                              GPIO1C5_MMC0_D3 << GPIO1C5_SHIFT |
 157                              GPIO1C4_MMC0_D2 << GPIO1C4_SHIFT |
 158                              GPIO1C3_MMC0_D1 << GPIO1C3_SHIFT |
 159                              GPIO1C2_MMC0_D0 << GPIO1C2_SHIFT |
 160                              GPIO1C1_MMC0_DETN << GPIO1C1_SHIFT |
 161                              GPIO1C0_MMC0_CLKOUT << GPIO1C0_SHIFT);
 162                 break;
 163         }
 164 }
 165
 166 static int rk3036_pinctrl_request(struct udevice *dev, int func, int flags)
 167 {
 168         struct rk3036_pinctrl_priv *priv = dev_get_priv(dev);
 169
 170         debug("%s: func=%x, flags=%x\n", __func__, func, flags);
 171         switch (func) {
 172         case PERIPH_ID_PWM0:
 173         case PERIPH_ID_PWM1:
 174         case PERIPH_ID_PWM2:
 175         case PERIPH_ID_PWM3:
 176                 pinctrl_rk3036_pwm_config(priv->grf, func);
 177                 break;
 178         case PERIPH_ID_I2C0:
 179         case PERIPH_ID_I2C1:
 180         case PERIPH_ID_I2C2:
 181                 pinctrl_rk3036_i2c_config(priv->grf, func);
 182                 break;
 183         case PERIPH_ID_SPI0:
 184                 pinctrl_rk3036_spi_config(priv->grf, flags);
 185                 break;
 186         case PERIPH_ID_UART0:
 187         case PERIPH_ID_UART1:
 188         case PERIPH_ID_UART2:
 189                 pinctrl_rk3036_uart_config(priv->grf, func);
 190                 break;
 191         case PERIPH_ID_SDMMC0:
 192         case PERIPH_ID_SDMMC1:
 193                 pinctrl_rk3036_sdmmc_config(priv->grf, func);
 194                 break;
 195         default:
 196                 return -EINVAL;
 197         }
 198
 199         return 0;
 200 }
 201
 202 static int rk3036_pinctrl_get_periph_id(struct udevice *dev,
 203                                         struct udevice *periph)
 204 {
 205         u32 cell[3];
 206         int ret;
 207
 208         ret = fdtdec_get_int_array(gd->fdt_blob, dev_of_offset(periph),
 209                                    "interrupts", cell, ARRAY_SIZE(cell));
 210         if (ret < 0)
 211                 return -EINVAL;
 212
 213         switch (cell[1]) {
 214         case 14:
 215                 return PERIPH_ID_SDCARD;
 216         case 16:
 217                 return PERIPH_ID_EMMC;
 218         case 20:
 219                 return PERIPH_ID_UART0;
 220         case 21:
 221                 return PERIPH_ID_UART1;
 222         case 22:
 223                 return PERIPH_ID_UART2;
 224         case 23:
 225                 return PERIPH_ID_SPI0;
 226         case 24:
 227                 return PERIPH_ID_I2C0;
 228         case 25:
 229                 return PERIPH_ID_I2C1;
 230         case 26:
 231                 return PERIPH_ID_I2C2;
 232         case 30:
 233                 return PERIPH_ID_PWM0;
 234         }
 235         return -ENOENT;
 236 }
 237
 238 static int rk3036_pinctrl_set_state_simple(struct udevice *dev,
 239                                            struct udevice *periph)
 240 {
 241         int func;
 242
 243         func = rk3036_pinctrl_get_periph_id(dev, periph);
 244         if (func < 0)
 245                 return func;
 246         return rk3036_pinctrl_request(dev, func, 0);
 247 }
 248
 249 static struct pinctrl_ops rk3036_pinctrl_ops = {
 250         .set_state_simple       = rk3036_pinctrl_set_state_simple,
 251         .request        = rk3036_pinctrl_request,
 252         .get_periph_id  = rk3036_pinctrl_get_periph_id,
 253 };
 254
 255 static int rk3036_pinctrl_probe(struct udevice *dev)
 256 {
 257         struct rk3036_pinctrl_priv *priv = dev_get_priv(dev);
 258
 259         priv->grf = syscon_get_first_range(ROCKCHIP_SYSCON_GRF);
 260         debug("%s: grf=%p\n", __func__, priv->grf);
 261         return 0;
 262 }
 263
 264 static const struct udevice_id rk3036_pinctrl_ids[] = {
 265         { .compatible = "rockchip,rk3036-pinctrl" },
 266         { }
 267 };
 268
 269 U_BOOT_DRIVER(pinctrl_rk3036) = {
 270         .name           = "pinctrl_rk3036",
 271         .id             = UCLASS_PINCTRL,
 272         .of_match       = rk3036_pinctrl_ids,
 273         .priv_auto_alloc_size = sizeof(struct rk3036_pinctrl_priv),
 274         .ops            = &rk3036_pinctrl_ops,
 275         .bind           = dm_scan_fdt_dev,
 276         .probe          = rk3036_pinctrl_probe,
 277 };