arch/arm/mach-rockchip/rk3188-board-spl.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * (C) Copyright 2015 Google, Inc
   4  */
   5
   6 #include <clk.h>
   7 #include <common.h>
   8 #include <debug_uart.h>
   9 #include <dm.h>
  10 #include <fdtdec.h>
  11 #include <led.h>
  12 #include <malloc.h>
  13 #include <ram.h>
  14 #include <spl.h>
  15 #include <syscon.h>
  16 #include <asm/gpio.h>
  17 #include <asm/io.h>
  18 #include <asm/arch/bootrom.h>
  19 #include <asm/arch/clock.h>
  20 #include <asm/arch/grf_rk3188.h>
  21 #include <asm/arch/hardware.h>
  22 #include <asm/arch/periph.h>
  23 #include <asm/arch/pmu_rk3188.h>
  24 #include <asm/arch/sdram.h>
  25 #include <asm/arch/timer.h>
  26 #include <dm/pinctrl.h>
  27 #include <dm/root.h>
  28 #include <dm/test.h>
  29 #include <dm/util.h>
  30 #include <power/regulator.h>
  31
  32 DECLARE_GLOBAL_DATA_PTR;
  33
  34 u32 spl_boot_device(void)
  35 {
  36 #if !CONFIG_IS_ENABLED(OF_PLATDATA)
  37         const void *blob = gd->fdt_blob;
  38         struct udevice *dev;
  39         const char *bootdev;
  40         int node;
  41         int ret;
  42
  43         bootdev = fdtdec_get_config_string(blob, "u-boot,boot0");
  44         debug("Boot device %s\n", bootdev);
  45         if (!bootdev)
  46                 goto fallback;
  47
  48         node = fdt_path_offset(blob, bootdev);
  49         if (node < 0) {
  50                 debug("node=%d\n", node);
  51                 goto fallback;
  52         }
  53         ret = device_get_global_by_ofnode(offset_to_ofnode(node), &dev);
  54         if (ret) {
  55                 debug("device at node %s/%d not found: %d\n", bootdev, node,
  56                       ret);
  57                 goto fallback;
  58         }
  59         debug("Found device %s\n", dev->name);
  60         switch (device_get_uclass_id(dev)) {
  61         case UCLASS_SPI_FLASH:
  62                 return BOOT_DEVICE_SPI;
  63         case UCLASS_MMC:
  64                 return BOOT_DEVICE_MMC1;
  65         default:
  66                 debug("Booting from device uclass '%s' not supported\n",
  67                       dev_get_uclass_name(dev));
  68         }
  69
  70 fallback:
  71 #endif
  72         return BOOT_DEVICE_MMC1;
  73 }
  74
  75 static int setup_arm_clock(void)
  76 {
  77         struct udevice *dev;
  78         struct clk clk;
  79         int ret;
  80
  81         ret = rockchip_get_clk(&dev);
  82         if (ret)
  83                 return ret;
  84
  85         clk.id = CLK_ARM;
  86         ret = clk_request(dev, &clk);
  87         if (ret < 0)
  88                 return ret;
  89
  90         ret = clk_set_rate(&clk, 600000000);
  91
  92         clk_free(&clk);
  93         return ret;
  94 }
  95
  96 void board_debug_uart_init(void)
  97 {
  98         /* Enable early UART on the RK3188 */
  99 #define GRF_BASE        0x20008000
 100         struct rk3188_grf * const grf = (void *)GRF_BASE;
 101         enum {
 102                 GPIO1B1_SHIFT           = 2,
 103                 GPIO1B1_MASK            = 3,
 104                 GPIO1B1_GPIO            = 0,
 105                 GPIO1B1_UART2_SOUT,
 106
 107                 GPIO1B0_SHIFT           = 0,
 108                 GPIO1B0_MASK            = 3,
 109                 GPIO1B0_GPIO            = 0,
 110                 GPIO1B0_UART2_SIN,
 111         };
 112
 113         /* Enable early UART on the RK3188 */
 114         rk_clrsetreg(&grf->gpio1b_iomux,
 115                      GPIO1B1_MASK << GPIO1B1_SHIFT |
 116                      GPIO1B0_MASK << GPIO1B0_SHIFT,
 117                      GPIO1B1_UART2_SOUT << GPIO1B1_SHIFT |
 118                      GPIO1B0_UART2_SIN << GPIO1B0_SHIFT);
 119 }
 120
 121 void board_init_f(ulong dummy)
 122 {
 123         struct udevice *dev;
 124         int ret;
 125
 126 #define EARLY_UART
 127 #ifdef EARLY_UART
 128         /*
 129          * Debug UART can be used from here if required:
 130          *
 131          * debug_uart_init();
 132          * printch('a');
 133          * printhex8(0x1234);
 134          * printascii("string");
 135          */
 136         debug_uart_init();
 137         printascii("U-Boot SPL board init");
 138 #endif
 139
 140 #ifdef CONFIG_ROCKCHIP_USB_UART
 141         rk_clrsetreg(&grf->uoc0_con[0],
 142                      SIDDQ_MASK | UOC_DISABLE_MASK | COMMON_ON_N_MASK,
 143                      1 << SIDDQ_SHIFT | 1 << UOC_DISABLE_SHIFT |
 144                      1 << COMMON_ON_N_SHIFT);
 145         rk_clrsetreg(&grf->uoc0_con[2],
 146                      SOFT_CON_SEL_MASK, 1 << SOFT_CON_SEL_SHIFT);
 147         rk_clrsetreg(&grf->uoc0_con[3],
 148                      OPMODE_MASK | XCVRSELECT_MASK |
 149                      TERMSEL_FULLSPEED_MASK | SUSPENDN_MASK,
 150                      OPMODE_NODRIVING << OPMODE_SHIFT |
 151                      XCVRSELECT_FSTRANSC << XCVRSELECT_SHIFT |
 152                      1 << TERMSEL_FULLSPEED_SHIFT |
 153                      1 << SUSPENDN_SHIFT);
 154         rk_clrsetreg(&grf->uoc0_con[0],
 155                      BYPASSSEL_MASK | BYPASSDMEN_MASK,
 156                      1 << BYPASSSEL_SHIFT | 1 << BYPASSDMEN_SHIFT);
 157 #endif
 158
 159         ret = spl_early_init();
 160         if (ret) {
 161                 debug("spl_early_init() failed: %d\n", ret);
 162                 hang();
 163         }
 164
 165         ret = rockchip_get_clk(&dev);
 166         if (ret) {
 167                 debug("CLK init failed: %d\n", ret);
 168                 return;
 169         }
 170
 171         ret = uclass_get_device(UCLASS_RAM, 0, &dev);
 172         if (ret) {
 173                 debug("DRAM init failed: %d\n", ret);
 174                 return;
 175         }
 176
 177         setup_arm_clock();
 178 #if CONFIG_IS_ENABLED(ROCKCHIP_BACK_TO_BROM) && !defined(CONFIG_SPL_BOARD_INIT)
 179         back_to_bootrom(BROM_BOOT_NEXTSTAGE);
 180 #endif
 181 }
 182
 183 static int setup_led(void)
 184 {
 185 #ifdef CONFIG_SPL_LED
 186         struct udevice *dev;
 187         char *led_name;
 188         int ret;
 189
 190         led_name = fdtdec_get_config_string(gd->fdt_blob, "u-boot,boot-led");
 191         if (!led_name)
 192                 return 0;
 193         ret = led_get_by_label(led_name, &dev);
 194         if (ret) {
 195                 debug("%s: get=%d\n", __func__, ret);
 196                 return ret;
 197         }
 198         ret = led_set_on(dev, 1);
 199         if (ret)
 200                 return ret;
 201 #endif
 202
 203         return 0;
 204 }
 205
 206 void spl_board_init(void)
 207 {
 208         int ret;
 209
 210         ret = setup_led();
 211         if (ret) {
 212                 debug("LED ret=%d\n", ret);
 213                 hang();
 214         }
 215
 216         preloader_console_init();
 217 #if CONFIG_IS_ENABLED(ROCKCHIP_BACK_TO_BROM)
 218         back_to_bootrom(BROM_BOOT_NEXTSTAGE);
 219 #endif
 220         return;
 221 }