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

   1 /*
   2  * (C) Copyright 2015 Google, Inc
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0+
   5  */
   6
   7 #include <clk.h>
   8 #include <common.h>
   9 #include <debug_uart.h>
  10 #include <dm.h>
  11 #include <fdtdec.h>
  12 #include <led.h>
  13 #include <malloc.h>
  14 #include <ram.h>
  15 #include <spl.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/hardware.h>
  21 #include <asm/arch/periph.h>
  22 #include <asm/arch/pmu_rk3188.h>
  23 #include <asm/arch/sdram.h>
  24 #include <asm/arch/timer.h>
  25 #include <dm/pinctrl.h>
  26 #include <dm/root.h>
  27 #include <dm/test.h>
  28 #include <dm/util.h>
  29 #include <power/regulator.h>
  30 #include <syscon.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_of_offset(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_init_f(ulong dummy)
  97 {
  98         struct udevice *pinctrl, *dev;
  99         int ret;
 100
 101         /* Example code showing how to enable the debug UART on RK3188 */
 102 #ifdef EARLY_UART
 103 #include <asm/arch/grf_rk3188.h>
 104         /* Enable early UART on the RK3188 */
 105 #define GRF_BASE        0x20008000
 106         struct rk3188_grf * const grf = (void *)GRF_BASE;
 107
 108         rk_clrsetreg(&grf->gpio1b_iomux,
 109                      GPIO1B1_MASK << GPIO1B1_SHIFT |
 110                      GPIO1B0_MASK << GPIO1B0_SHIFT,
 111                      GPIO1B1_UART2_SOUT << GPIO1B1_SHIFT |
 112                      GPIO1B0_UART2_SIN << GPIO1B0_SHIFT);
 113         /*
 114          * Debug UART can be used from here if required:
 115          *
 116          * debug_uart_init();
 117          * printch('a');
 118          * printhex8(0x1234);
 119          * printascii("string");
 120          */
 121         debug_uart_init();
 122         printch('s');
 123         printch('p');
 124         printch('l');
 125         printch('\n');
 126 #endif
 127
 128         ret = spl_early_init();
 129         if (ret) {
 130                 debug("spl_early_init() failed: %d\n", ret);
 131                 hang();
 132         }
 133
 134         rockchip_timer_init();
 135
 136         ret = rockchip_get_clk(&dev);
 137         if (ret) {
 138                 debug("CLK init failed: %d\n", ret);
 139                 return;
 140         }
 141
 142         ret = uclass_get_device(UCLASS_PINCTRL, 0, &pinctrl);
 143         if (ret) {
 144                 debug("Pinctrl init failed: %d\n", ret);
 145                 return;
 146         }
 147
 148         ret = uclass_get_device(UCLASS_RAM, 0, &dev);
 149         if (ret) {
 150                 debug("DRAM init failed: %d\n", ret);
 151                 return;
 152         }
 153
 154         setup_arm_clock();
 155 #if CONFIG_IS_ENABLED(ROCKCHIP_BACK_TO_BROM) && !defined(CONFIG_SPL_BOARD_INIT)
 156         back_to_bootrom(BROM_BOOT_NEXTSTAGE);
 157 #endif
 158 }
 159
 160 static int setup_led(void)
 161 {
 162 #ifdef CONFIG_SPL_LED
 163         struct udevice *dev;
 164         char *led_name;
 165         int ret;
 166
 167         led_name = fdtdec_get_config_string(gd->fdt_blob, "u-boot,boot-led");
 168         if (!led_name)
 169                 return 0;
 170         ret = led_get_by_label(led_name, &dev);
 171         if (ret) {
 172                 debug("%s: get=%d\n", __func__, ret);
 173                 return ret;
 174         }
 175         ret = led_set_on(dev, 1);
 176         if (ret)
 177                 return ret;
 178 #endif
 179
 180         return 0;
 181 }
 182
 183 void spl_board_init(void)
 184 {
 185         struct udevice *pinctrl;
 186         int ret;
 187
 188         ret = setup_led();
 189         if (ret) {
 190                 debug("LED ret=%d\n", ret);
 191                 hang();
 192         }
 193
 194         ret = uclass_get_device(UCLASS_PINCTRL, 0, &pinctrl);
 195         if (ret) {
 196                 debug("%s: Cannot find pinctrl device\n", __func__);
 197                 goto err;
 198         }
 199
 200 #ifdef CONFIG_SPL_MMC_SUPPORT
 201         ret = pinctrl_request_noflags(pinctrl, PERIPH_ID_SDCARD);
 202         if (ret) {
 203                 debug("%s: Failed to set up SD card\n", __func__);
 204                 goto err;
 205         }
 206 #endif
 207
 208         /* Enable debug UART */
 209         ret = pinctrl_request_noflags(pinctrl, PERIPH_ID_UART_DBG);
 210         if (ret) {
 211                 debug("%s: Failed to set up console UART\n", __func__);
 212                 goto err;
 213         }
 214
 215         preloader_console_init();
 216 #if CONFIG_IS_ENABLED(ROCKCHIP_BACK_TO_BROM)
 217         back_to_bootrom(BROM_BOOT_NEXTSTAGE);
 218 #endif
 219         return;
 220
 221 err:
 222         printf("spl_board_init: Error %d\n", ret);
 223
 224         /* No way to report error here */
 225         hang();
 226 }