arch/arm/mach-rockchip/rk3288-board-spl.c

   1 /*
   2  * (C) Copyright 2015 Google, Inc
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0+
   5  */
   6
   7 #include <common.h>
   8 #include <debug_uart.h>
   9 #include <dm.h>
  10 #include <fdtdec.h>
  11 #include <i2c.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_rk3288.h>
  23 #include <asm/arch/sdram.h>
  24 #include <asm/arch/sdram_common.h>
  25 #include <asm/arch/sys_proto.h>
  26 #include <asm/arch/timer.h>
  27 #include <dm/pinctrl.h>
  28 #include <dm/root.h>
  29 #include <dm/test.h>
  30 #include <dm/util.h>
  31 #include <power/regulator.h>
  32 #include <power/rk8xx_pmic.h>
  33
  34 DECLARE_GLOBAL_DATA_PTR;
  35
  36 u32 spl_boot_device(void)
  37 {
  38 #if !CONFIG_IS_ENABLED(OF_PLATDATA)
  39         const void *blob = gd->fdt_blob;
  40         struct udevice *dev;
  41         const char *bootdev;
  42         int node;
  43         int ret;
  44
  45         bootdev = fdtdec_get_config_string(blob, "u-boot,boot0");
  46         debug("Boot device %s\n", bootdev);
  47         if (!bootdev)
  48                 goto fallback;
  49
  50         node = fdt_path_offset(blob, bootdev);
  51         if (node < 0) {
  52                 debug("node=%d\n", node);
  53                 goto fallback;
  54         }
  55         ret = device_get_global_by_of_offset(node, &dev);
  56         if (ret) {
  57                 debug("device at node %s/%d not found: %d\n", bootdev, node,
  58                       ret);
  59                 goto fallback;
  60         }
  61         debug("Found device %s\n", dev->name);
  62         switch (device_get_uclass_id(dev)) {
  63         case UCLASS_SPI_FLASH:
  64                 return BOOT_DEVICE_SPI;
  65         case UCLASS_MMC:
  66                 return BOOT_DEVICE_MMC1;
  67         default:
  68                 debug("Booting from device uclass '%s' not supported\n",
  69                       dev_get_uclass_name(dev));
  70         }
  71
  72 fallback:
  73 #elif defined(CONFIG_TARGET_CHROMEBOOK_JERRY) || \
  74                 defined(CONFIG_TARGET_CHROMEBIT_MICKEY) || \
  75                 defined(CONFIG_TARGET_CHROMEBOOK_MINNIE)
  76         return BOOT_DEVICE_SPI;
  77 #endif
  78         return BOOT_DEVICE_MMC1;
  79 }
  80
  81 #ifdef CONFIG_SPL_MMC_SUPPORT
  82 static int configure_emmc(struct udevice *pinctrl)
  83 {
  84 #if defined(CONFIG_TARGET_CHROMEBOOK_JERRY)
  85
  86         struct gpio_desc desc;
  87         int ret;
  88
  89         pinctrl_request_noflags(pinctrl, PERIPH_ID_EMMC);
  90
  91         /*
  92          * TODO(sjg@chromium.org): Pick this up from device tree or perhaps
  93          * use the EMMC_PWREN setting.
  94          */
  95         ret = dm_gpio_lookup_name("D9", &desc);
  96         if (ret) {
  97                 debug("gpio ret=%d\n", ret);
  98                 return ret;
  99         }
 100         ret = dm_gpio_request(&desc, "emmc_pwren");
 101         if (ret) {
 102                 debug("gpio_request ret=%d\n", ret);
 103                 return ret;
 104         }
 105         ret = dm_gpio_set_dir_flags(&desc, GPIOD_IS_OUT);
 106         if (ret) {
 107                 debug("gpio dir ret=%d\n", ret);
 108                 return ret;
 109         }
 110         ret = dm_gpio_set_value(&desc, 1);
 111         if (ret) {
 112                 debug("gpio value ret=%d\n", ret);
 113                 return ret;
 114         }
 115 #endif
 116         return 0;
 117 }
 118 #endif
 119
 120 #if !defined(CONFIG_SPL_OF_PLATDATA)
 121 static int phycore_init(void)
 122 {
 123         struct udevice *pmic;
 124         int ret;
 125
 126         ret = uclass_first_device_err(UCLASS_PMIC, &pmic);
 127         if (ret)
 128                 return ret;
 129
 130 #if defined(CONFIG_SPL_POWER_SUPPORT)
 131         /* Increase USB input current to 2A */
 132         ret = rk818_spl_configure_usb_input_current(pmic, 2000);
 133         if (ret)
 134                 return ret;
 135
 136         /* Close charger when USB lower then 3.26V */
 137         ret = rk818_spl_configure_usb_chrg_shutdown(pmic, 3260000);
 138         if (ret)
 139                 return ret;
 140 #endif
 141
 142         return 0;
 143 }
 144 #endif
 145
 146 void board_init_f(ulong dummy)
 147 {
 148         struct udevice *pinctrl;
 149         struct udevice *dev;
 150         int ret;
 151
 152         /* Example code showing how to enable the debug UART on RK3288 */
 153 #include <asm/arch/grf_rk3288.h>
 154         /* Enable early UART on the RK3288 */
 155 #define GRF_BASE        0xff770000
 156         struct rk3288_grf * const grf = (void *)GRF_BASE;
 157
 158         rk_clrsetreg(&grf->gpio7ch_iomux, GPIO7C7_MASK << GPIO7C7_SHIFT |
 159                      GPIO7C6_MASK << GPIO7C6_SHIFT,
 160                      GPIO7C7_UART2DBG_SOUT << GPIO7C7_SHIFT |
 161                      GPIO7C6_UART2DBG_SIN << GPIO7C6_SHIFT);
 162         /*
 163          * Debug UART can be used from here if required:
 164          *
 165          * debug_uart_init();
 166          * printch('a');
 167          * printhex8(0x1234);
 168          * printascii("string");
 169          */
 170         debug_uart_init();
 171         debug("\nspl:debug uart enabled in %s\n", __func__);
 172         ret = spl_early_init();
 173         if (ret) {
 174                 debug("spl_early_init() failed: %d\n", ret);
 175                 hang();
 176         }
 177
 178         rockchip_timer_init();
 179         configure_l2ctlr();
 180
 181         ret = rockchip_get_clk(&dev);
 182         if (ret) {
 183                 debug("CLK init failed: %d\n", ret);
 184                 return;
 185         }
 186
 187         ret = uclass_get_device(UCLASS_PINCTRL, 0, &pinctrl);
 188         if (ret) {
 189                 debug("Pinctrl init failed: %d\n", ret);
 190                 return;
 191         }
 192
 193 #if !defined(CONFIG_SPL_OF_PLATDATA)
 194         if (of_machine_is_compatible("phytec,rk3288-phycore-som")) {
 195                 ret = phycore_init();
 196                 if (ret) {
 197                         debug("Failed to set up phycore power settings: %d\n",
 198                               ret);
 199                         return;
 200                 }
 201         }
 202 #endif
 203
 204 #if !defined(CONFIG_SUPPORT_TPL)
 205         debug("\nspl:init dram\n");
 206         ret = uclass_get_device(UCLASS_RAM, 0, &dev);
 207         if (ret) {
 208                 debug("DRAM init failed: %d\n", ret);
 209                 return;
 210         }
 211 #endif
 212
 213 #if CONFIG_IS_ENABLED(ROCKCHIP_BACK_TO_BROM) && !defined(CONFIG_SPL_BOARD_INIT)
 214         back_to_bootrom(BROM_BOOT_NEXTSTAGE);
 215 #endif
 216 }
 217
 218 static int setup_led(void)
 219 {
 220 #ifdef CONFIG_SPL_LED
 221         struct udevice *dev;
 222         char *led_name;
 223         int ret;
 224
 225         led_name = fdtdec_get_config_string(gd->fdt_blob, "u-boot,boot-led");
 226         if (!led_name)
 227                 return 0;
 228         ret = led_get_by_label(led_name, &dev);
 229         if (ret) {
 230                 debug("%s: get=%d\n", __func__, ret);
 231                 return ret;
 232         }
 233         ret = led_set_on(dev, 1);
 234         if (ret)
 235                 return ret;
 236 #endif
 237
 238         return 0;
 239 }
 240
 241 void spl_board_init(void)
 242 {
 243         struct udevice *pinctrl;
 244         int ret;
 245
 246         ret = setup_led();
 247
 248         if (ret) {
 249                 debug("LED ret=%d\n", ret);
 250                 hang();
 251         }
 252
 253         ret = uclass_get_device(UCLASS_PINCTRL, 0, &pinctrl);
 254         if (ret) {
 255                 debug("%s: Cannot find pinctrl device\n", __func__);
 256                 goto err;
 257         }
 258
 259 #ifdef CONFIG_SPL_MMC_SUPPORT
 260         ret = pinctrl_request_noflags(pinctrl, PERIPH_ID_SDCARD);
 261         if (ret) {
 262                 debug("%s: Failed to set up SD card\n", __func__);
 263                 goto err;
 264         }
 265         ret = configure_emmc(pinctrl);
 266         if (ret) {
 267                 debug("%s: Failed to set up eMMC\n", __func__);
 268                 goto err;
 269         }
 270 #endif
 271
 272         /* Enable debug UART */
 273         ret = pinctrl_request_noflags(pinctrl, PERIPH_ID_UART_DBG);
 274         if (ret) {
 275                 debug("%s: Failed to set up console UART\n", __func__);
 276                 goto err;
 277         }
 278
 279         preloader_console_init();
 280 #if CONFIG_IS_ENABLED(ROCKCHIP_BACK_TO_BROM)
 281         back_to_bootrom(BROM_BOOT_NEXTSTAGE);
 282 #endif
 283         return;
 284 err:
 285         printf("spl_board_init: Error %d\n", ret);
 286
 287         /* No way to report error here */
 288         hang();
 289 }
 290
 291 #ifdef CONFIG_SPL_OS_BOOT
 292
 293 #define PMU_BASE                0xff730000
 294 int dram_init_banksize(void)
 295 {
 296         struct rk3288_pmu *const pmu = (void *)PMU_BASE;
 297         size_t size = rockchip_sdram_size((phys_addr_t)&pmu->sys_reg[2]);
 298
 299         gd->bd->bi_dram[0].start = CONFIG_SYS_SDRAM_BASE;
 300         gd->bd->bi_dram[0].size = size;
 301
 302         return 0;
 303 }
 304 #endif