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 <led.h>
  12 #include <malloc.h>
  13 #include <ram.h>
  14 #include <spl.h>
  15 #include <asm/gpio.h>
  16 #include <asm/io.h>
  17 #include <asm/arch/bootrom.h>
  18 #include <asm/arch/clock.h>
  19 #include <asm/arch/hardware.h>
  20 #include <asm/arch/periph.h>
  21 #include <asm/arch/sdram.h>
  22 #include <asm/arch/timer.h>
  23 #include <dm/pinctrl.h>
  24 #include <dm/root.h>
  25 #include <dm/test.h>
  26 #include <dm/util.h>
  27 #include <power/regulator.h>
  28
  29 DECLARE_GLOBAL_DATA_PTR;
  30
  31 u32 spl_boot_device(void)
  32 {
  33 #if !CONFIG_IS_ENABLED(OF_PLATDATA)
  34         const void *blob = gd->fdt_blob;
  35         struct udevice *dev;
  36         const char *bootdev;
  37         int node;
  38         int ret;
  39
  40         bootdev = fdtdec_get_config_string(blob, "u-boot,boot0");
  41         debug("Boot device %s\n", bootdev);
  42         if (!bootdev)
  43                 goto fallback;
  44
  45         node = fdt_path_offset(blob, bootdev);
  46         if (node < 0) {
  47                 debug("node=%d\n", node);
  48                 goto fallback;
  49         }
  50         ret = device_get_global_by_of_offset(node, &dev);
  51         if (ret) {
  52                 debug("device at node %s/%d not found: %d\n", bootdev, node,
  53                       ret);
  54                 goto fallback;
  55         }
  56         debug("Found device %s\n", dev->name);
  57         switch (device_get_uclass_id(dev)) {
  58         case UCLASS_SPI_FLASH:
  59                 return BOOT_DEVICE_SPI;
  60         case UCLASS_MMC:
  61                 return BOOT_DEVICE_MMC1;
  62         default:
  63                 debug("Booting from device uclass '%s' not supported\n",
  64                       dev_get_uclass_name(dev));
  65         }
  66
  67 fallback:
  68 #elif defined(CONFIG_TARGET_CHROMEBOOK_JERRY) || \
  69                 defined(CONFIG_TARGET_CHROMEBIT_MICKEY) || \
  70                 defined(CONFIG_TARGET_CHROMEBOOK_MINNIE)
  71         return BOOT_DEVICE_SPI;
  72 #endif
  73         return BOOT_DEVICE_MMC1;
  74 }
  75
  76 u32 spl_boot_mode(const u32 boot_device)
  77 {
  78         return MMCSD_MODE_RAW;
  79 }
  80
  81 /* read L2 control register (L2CTLR) */
  82 static inline uint32_t read_l2ctlr(void)
  83 {
  84         uint32_t val = 0;
  85
  86         asm volatile ("mrc p15, 1, %0, c9, c0, 2" : "=r" (val));
  87
  88         return val;
  89 }
  90
  91 /* write L2 control register (L2CTLR) */
  92 static inline void write_l2ctlr(uint32_t val)
  93 {
  94         /*
  95          * Note: L2CTLR can only be written when the L2 memory system
  96          * is idle, ie before the MMU is enabled.
  97          */
  98         asm volatile("mcr p15, 1, %0, c9, c0, 2" : : "r" (val) : "memory");
  99         isb();
 100 }
 101
 102 static void configure_l2ctlr(void)
 103 {
 104         uint32_t l2ctlr;
 105
 106         l2ctlr = read_l2ctlr();
 107         l2ctlr &= 0xfffc0000; /* clear bit0~bit17 */
 108
 109         /*
 110         * Data RAM write latency: 2 cycles
 111         * Data RAM read latency: 2 cycles
 112         * Data RAM setup latency: 1 cycle
 113         * Tag RAM write latency: 1 cycle
 114         * Tag RAM read latency: 1 cycle
 115         * Tag RAM setup latency: 1 cycle
 116         */
 117         l2ctlr |= (1 << 3 | 1 << 0);
 118         write_l2ctlr(l2ctlr);
 119 }
 120
 121 #ifdef CONFIG_SPL_MMC_SUPPORT
 122 static int configure_emmc(struct udevice *pinctrl)
 123 {
 124 #if defined(CONFIG_TARGET_CHROMEBOOK_JERRY)
 125
 126         struct gpio_desc desc;
 127         int ret;
 128
 129         pinctrl_request_noflags(pinctrl, PERIPH_ID_EMMC);
 130
 131         /*
 132          * TODO(sjg@chromium.org): Pick this up from device tree or perhaps
 133          * use the EMMC_PWREN setting.
 134          */
 135         ret = dm_gpio_lookup_name("D9", &desc);
 136         if (ret) {
 137                 debug("gpio ret=%d\n", ret);
 138                 return ret;
 139         }
 140         ret = dm_gpio_request(&desc, "emmc_pwren");
 141         if (ret) {
 142                 debug("gpio_request ret=%d\n", ret);
 143                 return ret;
 144         }
 145         ret = dm_gpio_set_dir_flags(&desc, GPIOD_IS_OUT);
 146         if (ret) {
 147                 debug("gpio dir ret=%d\n", ret);
 148                 return ret;
 149         }
 150         ret = dm_gpio_set_value(&desc, 1);
 151         if (ret) {
 152                 debug("gpio value ret=%d\n", ret);
 153                 return ret;
 154         }
 155 #endif
 156         return 0;
 157 }
 158 #endif
 159
 160 void board_init_f(ulong dummy)
 161 {
 162         struct udevice *pinctrl;
 163         struct udevice *dev;
 164         int ret;
 165
 166         /* Example code showing how to enable the debug UART on RK3288 */
 167 #ifdef EARLY_UART
 168 #include <asm/arch/grf_rk3288.h>
 169         /* Enable early UART on the RK3288 */
 170 #define GRF_BASE        0xff770000
 171         struct rk3288_grf * const grf = (void *)GRF_BASE;
 172
 173         rk_clrsetreg(&grf->gpio7ch_iomux, GPIO7C7_MASK << GPIO7C7_SHIFT |
 174                      GPIO7C6_MASK << GPIO7C6_SHIFT,
 175                      GPIO7C7_UART2DBG_SOUT << GPIO7C7_SHIFT |
 176                      GPIO7C6_UART2DBG_SIN << GPIO7C6_SHIFT);
 177         /*
 178          * Debug UART can be used from here if required:
 179          *
 180          * debug_uart_init();
 181          * printch('a');
 182          * printhex8(0x1234);
 183          * printascii("string");
 184          */
 185         debug_uart_init();
 186 #endif
 187
 188         ret = spl_early_init();
 189         if (ret) {
 190                 debug("spl_early_init() failed: %d\n", ret);
 191                 hang();
 192         }
 193
 194         rockchip_timer_init();
 195         configure_l2ctlr();
 196
 197         ret = rockchip_get_clk(&dev);
 198         if (ret) {
 199                 debug("CLK init failed: %d\n", ret);
 200                 return;
 201         }
 202
 203         ret = uclass_get_device(UCLASS_PINCTRL, 0, &pinctrl);
 204         if (ret) {
 205                 debug("Pinctrl init failed: %d\n", ret);
 206                 return;
 207         }
 208
 209         ret = uclass_get_device(UCLASS_RAM, 0, &dev);
 210         if (ret) {
 211                 debug("DRAM init failed: %d\n", ret);
 212                 return;
 213         }
 214 #if defined(CONFIG_ROCKCHIP_SPL_BACK_TO_BROM) && !defined(CONFIG_SPL_BOARD_INIT)
 215         back_to_bootrom();
 216 #endif
 217 }
 218
 219 static int setup_led(void)
 220 {
 221 #ifdef CONFIG_SPL_LED
 222         struct udevice *dev;
 223         char *led_name;
 224         int ret;
 225
 226         led_name = fdtdec_get_config_string(gd->fdt_blob, "u-boot,boot-led");
 227         if (!led_name)
 228                 return 0;
 229         ret = led_get_by_label(led_name, &dev);
 230         if (ret) {
 231                 debug("%s: get=%d\n", __func__, ret);
 232                 return ret;
 233         }
 234         ret = led_set_on(dev, 1);
 235         if (ret)
 236                 return ret;
 237 #endif
 238
 239         return 0;
 240 }
 241
 242 void spl_board_init(void)
 243 {
 244         struct udevice *pinctrl;
 245         int ret;
 246
 247         ret = setup_led();
 248
 249         if (ret) {
 250                 debug("LED ret=%d\n", ret);
 251                 hang();
 252         }
 253
 254         ret = uclass_get_device(UCLASS_PINCTRL, 0, &pinctrl);
 255         if (ret) {
 256                 debug("%s: Cannot find pinctrl device\n", __func__);
 257                 goto err;
 258         }
 259
 260 #ifdef CONFIG_SPL_MMC_SUPPORT
 261         ret = pinctrl_request_noflags(pinctrl, PERIPH_ID_SDCARD);
 262         if (ret) {
 263                 debug("%s: Failed to set up SD card\n", __func__);
 264                 goto err;
 265         }
 266         ret = configure_emmc(pinctrl);
 267         if (ret) {
 268                 debug("%s: Failed to set up eMMC\n", __func__);
 269                 goto err;
 270         }
 271 #endif
 272
 273         /* Enable debug UART */
 274         ret = pinctrl_request_noflags(pinctrl, PERIPH_ID_UART_DBG);
 275         if (ret) {
 276                 debug("%s: Failed to set up console UART\n", __func__);
 277                 goto err;
 278         }
 279
 280         preloader_console_init();
 281 #ifdef CONFIG_ROCKCHIP_SPL_BACK_TO_BROM
 282         back_to_bootrom();
 283 #endif
 284         return;
 285 err:
 286         printf("spl_board_init: Error %d\n", ret);
 287
 288         /* No way to report error here */
 289         hang();
 290 }