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 u32 spl_boot_mode(const u32 boot_device)
  76 {
  77         return MMCSD_MODE_RAW;
  78 }
  79
  80 static int setup_arm_clock(void)
  81 {
  82         struct udevice *dev;
  83         struct clk clk;
  84         int ret;
  85
  86         ret = rockchip_get_clk(&dev);
  87         if (ret)
  88                 return ret;
  89
  90         clk.id = CLK_ARM;
  91         ret = clk_request(dev, &clk);
  92         if (ret < 0)
  93                 return ret;
  94
  95         ret = clk_set_rate(&clk, 600000000);
  96
  97         clk_free(&clk);
  98         return ret;
  99 }
 100
 101 void board_init_f(ulong dummy)
 102 {
 103         struct udevice *pinctrl, *dev;
 104         int ret;
 105
 106         /* Example code showing how to enable the debug UART on RK3188 */
 107 #ifdef EARLY_UART
 108 #include <asm/arch/grf_rk3188.h>
 109         /* Enable early UART on the RK3188 */
 110 #define GRF_BASE        0x20008000
 111         struct rk3188_grf * const grf = (void *)GRF_BASE;
 112
 113         rk_clrsetreg(&grf->gpio1b_iomux,
 114                      GPIO1B1_MASK << GPIO1B1_SHIFT |
 115                      GPIO1B0_MASK << GPIO1B0_SHIFT,
 116                      GPIO1B1_UART2_SOUT << GPIO1B1_SHIFT |
 117                      GPIO1B0_UART2_SIN << GPIO1B0_SHIFT);
 118         /*
 119          * Debug UART can be used from here if required:
 120          *
 121          * debug_uart_init();
 122          * printch('a');
 123          * printhex8(0x1234);
 124          * printascii("string");
 125          */
 126         debug_uart_init();
 127         printch('s');
 128         printch('p');
 129         printch('l');
 130         printch('\n');
 131 #endif
 132
 133         ret = spl_early_init();
 134         if (ret) {
 135                 debug("spl_early_init() failed: %d\n", ret);
 136                 hang();
 137         }
 138
 139         rockchip_timer_init();
 140
 141         ret = rockchip_get_clk(&dev);
 142         if (ret) {
 143                 debug("CLK init failed: %d\n", ret);
 144                 return;
 145         }
 146
 147         ret = uclass_get_device(UCLASS_PINCTRL, 0, &pinctrl);
 148         if (ret) {
 149                 debug("Pinctrl init failed: %d\n", ret);
 150                 return;
 151         }
 152
 153         ret = uclass_get_device(UCLASS_RAM, 0, &dev);
 154         if (ret) {
 155                 debug("DRAM init failed: %d\n", ret);
 156                 return;
 157         }
 158
 159         setup_arm_clock();
 160 #if CONFIG_IS_ENABLED(ROCKCHIP_BACK_TO_BROM) && !defined(CONFIG_SPL_BOARD_INIT)
 161         back_to_bootrom(BROM_BOOT_NEXTSTAGE);
 162 #endif
 163 }
 164
 165 static int setup_led(void)
 166 {
 167 #ifdef CONFIG_SPL_LED
 168         struct udevice *dev;
 169         char *led_name;
 170         int ret;
 171
 172         led_name = fdtdec_get_config_string(gd->fdt_blob, "u-boot,boot-led");
 173         if (!led_name)
 174                 return 0;
 175         ret = led_get_by_label(led_name, &dev);
 176         if (ret) {
 177                 debug("%s: get=%d\n", __func__, ret);
 178                 return ret;
 179         }
 180         ret = led_set_on(dev, 1);
 181         if (ret)
 182                 return ret;
 183 #endif
 184
 185         return 0;
 186 }
 187
 188 void spl_board_init(void)
 189 {
 190         struct udevice *pinctrl;
 191         int ret;
 192
 193         ret = setup_led();
 194         if (ret) {
 195                 debug("LED ret=%d\n", ret);
 196                 hang();
 197         }
 198
 199         ret = uclass_get_device(UCLASS_PINCTRL, 0, &pinctrl);
 200         if (ret) {
 201                 debug("%s: Cannot find pinctrl device\n", __func__);
 202                 goto err;
 203         }
 204
 205 #ifdef CONFIG_SPL_MMC_SUPPORT
 206         ret = pinctrl_request_noflags(pinctrl, PERIPH_ID_SDCARD);
 207         if (ret) {
 208                 debug("%s: Failed to set up SD card\n", __func__);
 209                 goto err;
 210         }
 211 #endif
 212
 213         /* Enable debug UART */
 214         ret = pinctrl_request_noflags(pinctrl, PERIPH_ID_UART_DBG);
 215         if (ret) {
 216                 debug("%s: Failed to set up console UART\n", __func__);
 217                 goto err;
 218         }
 219
 220         preloader_console_init();
 221 #if CONFIG_IS_ENABLED(ROCKCHIP_BACK_TO_BROM)
 222         back_to_bootrom(BROM_BOOT_NEXTSTAGE);
 223 #endif
 224         return;
 225
 226 err:
 227         printf("spl_board_init: Error %d\n", ret);
 228
 229         /* No way to report error here */
 230         hang();
 231 }