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         struct rk3188_pmu *pmu;
 105         int ret;
 106
 107         /* Example code showing how to enable the debug UART on RK3188 */
 108 #ifdef EARLY_UART
 109 #include <asm/arch/grf_rk3188.h>
 110         /* Enable early UART on the RK3188 */
 111 #define GRF_BASE        0x20008000
 112         struct rk3188_grf * const grf = (void *)GRF_BASE;
 113
 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          * Debug UART can be used from here if required:
 121          *
 122          * debug_uart_init();
 123          * printch('a');
 124          * printhex8(0x1234);
 125          * printascii("string");
 126          */
 127         debug_uart_init();
 128         printch('s');
 129         printch('p');
 130         printch('l');
 131         printch('\n');
 132 #endif
 133
 134         ret = spl_early_init();
 135         if (ret) {
 136                 debug("spl_early_init() failed: %d\n", ret);
 137                 hang();
 138         }
 139
 140         rockchip_timer_init();
 141
 142         ret = rockchip_get_clk(&dev);
 143         if (ret) {
 144                 debug("CLK init failed: %d\n", ret);
 145                 return;
 146         }
 147
 148         /*
 149          * Recover the bootrom's stackpointer.
 150          * For whatever reason needs to run after rockchip_get_clk.
 151          */
 152         pmu = syscon_get_first_range(ROCKCHIP_SYSCON_PMU);
 153         if (IS_ERR(pmu))
 154                 error("pmu syscon returned %ld\n", PTR_ERR(pmu));
 155         SAVE_SP_ADDR = readl(&pmu->sys_reg[2]);
 156
 157         ret = uclass_get_device(UCLASS_PINCTRL, 0, &pinctrl);
 158         if (ret) {
 159                 debug("Pinctrl init failed: %d\n", ret);
 160                 return;
 161         }
 162
 163         ret = uclass_get_device(UCLASS_RAM, 0, &dev);
 164         if (ret) {
 165                 debug("DRAM init failed: %d\n", ret);
 166                 return;
 167         }
 168
 169         setup_arm_clock();
 170 #if CONFIG_IS_ENABLED(ROCKCHIP_BACK_TO_BROM) && !defined(CONFIG_SPL_BOARD_INIT)
 171         back_to_bootrom();
 172 #endif
 173 }
 174
 175 static int setup_led(void)
 176 {
 177 #ifdef CONFIG_SPL_LED
 178         struct udevice *dev;
 179         char *led_name;
 180         int ret;
 181
 182         led_name = fdtdec_get_config_string(gd->fdt_blob, "u-boot,boot-led");
 183         if (!led_name)
 184                 return 0;
 185         ret = led_get_by_label(led_name, &dev);
 186         if (ret) {
 187                 debug("%s: get=%d\n", __func__, ret);
 188                 return ret;
 189         }
 190         ret = led_set_on(dev, 1);
 191         if (ret)
 192                 return ret;
 193 #endif
 194
 195         return 0;
 196 }
 197
 198 void spl_board_init(void)
 199 {
 200         struct udevice *pinctrl;
 201         int ret;
 202
 203         ret = setup_led();
 204         if (ret) {
 205                 debug("LED ret=%d\n", ret);
 206                 hang();
 207         }
 208
 209         ret = uclass_get_device(UCLASS_PINCTRL, 0, &pinctrl);
 210         if (ret) {
 211                 debug("%s: Cannot find pinctrl device\n", __func__);
 212                 goto err;
 213         }
 214
 215 #ifdef CONFIG_SPL_MMC_SUPPORT
 216         ret = pinctrl_request_noflags(pinctrl, PERIPH_ID_SDCARD);
 217         if (ret) {
 218                 debug("%s: Failed to set up SD card\n", __func__);
 219                 goto err;
 220         }
 221 #endif
 222
 223         /* Enable debug UART */
 224         ret = pinctrl_request_noflags(pinctrl, PERIPH_ID_UART_DBG);
 225         if (ret) {
 226                 debug("%s: Failed to set up console UART\n", __func__);
 227                 goto err;
 228         }
 229
 230         preloader_console_init();
 231 #if CONFIG_IS_ENABLED(ROCKCHIP_BACK_TO_BROM)
 232         back_to_bootrom();
 233 #endif
 234         return;
 235
 236 err:
 237         printf("spl_board_init: Error %d\n", ret);
 238
 239         /* No way to report error here */
 240         hang();
 241 }