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/clock.h>
  18 #include <asm/arch/hardware.h>
  19 #include <asm/arch/periph.h>
  20 #include <asm/arch/sdram.h>
  21 #include <asm/arch/timer.h>
  22 #include <dm/pinctrl.h>
  23 #include <dm/root.h>
  24 #include <dm/test.h>
  25 #include <dm/util.h>
  26 #include <power/regulator.h>
  27
  28 DECLARE_GLOBAL_DATA_PTR;
  29
  30 u32 spl_boot_device(void)
  31 {
  32 #if !CONFIG_IS_ENABLED(OF_PLATDATA)
  33         const void *blob = gd->fdt_blob;
  34         struct udevice *dev;
  35         const char *bootdev;
  36         int node;
  37         int ret;
  38
  39         bootdev = fdtdec_get_config_string(blob, "u-boot,boot0");
  40         debug("Boot device %s\n", bootdev);
  41         if (!bootdev)
  42                 goto fallback;
  43
  44         node = fdt_path_offset(blob, bootdev);
  45         if (node < 0) {
  46                 debug("node=%d\n", node);
  47                 goto fallback;
  48         }
  49         ret = device_get_global_by_of_offset(node, &dev);
  50         if (ret) {
  51                 debug("device at node %s/%d not found: %d\n", bootdev, node,
  52                       ret);
  53                 goto fallback;
  54         }
  55         debug("Found device %s\n", dev->name);
  56         switch (device_get_uclass_id(dev)) {
  57         case UCLASS_SPI_FLASH:
  58                 return BOOT_DEVICE_SPI;
  59         case UCLASS_MMC:
  60                 return BOOT_DEVICE_MMC1;
  61         default:
  62                 debug("Booting from device uclass '%s' not supported\n",
  63                       dev_get_uclass_name(dev));
  64         }
  65
  66 fallback:
  67 #endif
  68         return BOOT_DEVICE_MMC1;
  69 }
  70
  71 u32 spl_boot_mode(const u32 boot_device)
  72 {
  73         return MMCSD_MODE_RAW;
  74 }
  75
  76 /* read L2 control register (L2CTLR) */
  77 static inline uint32_t read_l2ctlr(void)
  78 {
  79         uint32_t val = 0;
  80
  81         asm volatile ("mrc p15, 1, %0, c9, c0, 2" : "=r" (val));
  82
  83         return val;
  84 }
  85
  86 /* write L2 control register (L2CTLR) */
  87 static inline void write_l2ctlr(uint32_t val)
  88 {
  89         /*
  90          * Note: L2CTLR can only be written when the L2 memory system
  91          * is idle, ie before the MMU is enabled.
  92          */
  93         asm volatile("mcr p15, 1, %0, c9, c0, 2" : : "r" (val) : "memory");
  94         isb();
  95 }
  96
  97 static void configure_l2ctlr(void)
  98 {
  99         uint32_t l2ctlr;
 100
 101         l2ctlr = read_l2ctlr();
 102         l2ctlr &= 0xfffc0000; /* clear bit0~bit17 */
 103
 104         /*
 105         * Data RAM write latency: 2 cycles
 106         * Data RAM read latency: 2 cycles
 107         * Data RAM setup latency: 1 cycle
 108         * Tag RAM write latency: 1 cycle
 109         * Tag RAM read latency: 1 cycle
 110         * Tag RAM setup latency: 1 cycle
 111         */
 112         l2ctlr |= (1 << 3 | 1 << 0);
 113         write_l2ctlr(l2ctlr);
 114 }
 115
 116 #ifdef CONFIG_SPL_MMC_SUPPORT
 117 static int configure_emmc(struct udevice *pinctrl)
 118 {
 119         struct gpio_desc desc;
 120         int ret;
 121
 122         pinctrl_request_noflags(pinctrl, PERIPH_ID_EMMC);
 123
 124         /*
 125          * TODO(sjg@chromium.org): Pick this up from device tree or perhaps
 126          * use the EMMC_PWREN setting.
 127          */
 128         ret = dm_gpio_lookup_name("D9", &desc);
 129         if (ret) {
 130                 debug("gpio ret=%d\n", ret);
 131                 return ret;
 132         }
 133         ret = dm_gpio_request(&desc, "emmc_pwren");
 134         if (ret) {
 135                 debug("gpio_request ret=%d\n", ret);
 136                 return ret;
 137         }
 138         ret = dm_gpio_set_dir_flags(&desc, GPIOD_IS_OUT);
 139         if (ret) {
 140                 debug("gpio dir ret=%d\n", ret);
 141                 return ret;
 142         }
 143         ret = dm_gpio_set_value(&desc, 1);
 144         if (ret) {
 145                 debug("gpio value ret=%d\n", ret);
 146                 return ret;
 147         }
 148
 149         return 0;
 150 }
 151 #endif
 152 extern void back_to_bootrom(void);
 153 void board_init_f(ulong dummy)
 154 {
 155         struct udevice *pinctrl;
 156         struct udevice *dev;
 157         int ret;
 158
 159         /* Example code showing how to enable the debug UART on RK3288 */
 160 #ifdef EARLY_UART
 161 #include <asm/arch/grf_rk3288.h>
 162         /* Enable early UART on the RK3288 */
 163 #define GRF_BASE        0xff770000
 164         struct rk3288_grf * const grf = (void *)GRF_BASE;
 165
 166         rk_clrsetreg(&grf->gpio7ch_iomux, GPIO7C7_MASK << GPIO7C7_SHIFT |
 167                      GPIO7C6_MASK << GPIO7C6_SHIFT,
 168                      GPIO7C7_UART2DBG_SOUT << GPIO7C7_SHIFT |
 169                      GPIO7C6_UART2DBG_SIN << GPIO7C6_SHIFT);
 170         /*
 171          * Debug UART can be used from here if required:
 172          *
 173          * debug_uart_init();
 174          * printch('a');
 175          * printhex8(0x1234);
 176          * printascii("string");
 177          */
 178         debug_uart_init();
 179 #endif
 180
 181         ret = spl_init();
 182         if (ret) {
 183                 debug("spl_init() failed: %d\n", ret);
 184                 hang();
 185         }
 186
 187         rockchip_timer_init();
 188         configure_l2ctlr();
 189
 190         ret = rockchip_get_clk(&dev);
 191         if (ret) {
 192                 debug("CLK init failed: %d\n", ret);
 193                 return;
 194         }
 195
 196         ret = uclass_get_device(UCLASS_PINCTRL, 0, &pinctrl);
 197         if (ret) {
 198                 debug("Pinctrl init failed: %d\n", ret);
 199                 return;
 200         }
 201
 202         ret = uclass_get_device(UCLASS_RAM, 0, &dev);
 203         if (ret) {
 204                 debug("DRAM init failed: %d\n", ret);
 205                 return;
 206         }
 207 #ifdef CONFIG_ROCKCHIP_SPL_BACK_TO_BROM
 208         back_to_bootrom();
 209 #endif
 210 }
 211
 212 static int setup_led(void)
 213 {
 214 #ifdef CONFIG_SPL_LED
 215         struct udevice *dev;
 216         char *led_name;
 217         int ret;
 218
 219         led_name = fdtdec_get_config_string(gd->fdt_blob, "u-boot,boot-led");
 220         if (!led_name)
 221                 return 0;
 222         ret = led_get_by_label(led_name, &dev);
 223         if (ret) {
 224                 debug("%s: get=%d\n", __func__, ret);
 225                 return ret;
 226         }
 227         ret = led_set_on(dev, 1);
 228         if (ret)
 229                 return ret;
 230 #endif
 231
 232         return 0;
 233 }
 234
 235 void spl_board_init(void)
 236 {
 237         struct udevice *pinctrl;
 238         int ret;
 239
 240         ret = setup_led();
 241
 242         if (ret) {
 243                 debug("LED ret=%d\n", ret);
 244                 hang();
 245         }
 246
 247         ret = uclass_get_device(UCLASS_PINCTRL, 0, &pinctrl);
 248         if (ret) {
 249                 debug("%s: Cannot find pinctrl device\n", __func__);
 250                 goto err;
 251         }
 252 #ifdef CONFIG_SPL_MMC_SUPPORT
 253         if (!IS_ENABLED(CONFIG_TARGET_ROCK2) &&
 254             !IS_ENABLED(CONFIG_TARGET_FIREFLY_RK3288) &&
 255             !IS_ENABLED(CONFIG_TARGET_EVB_RK3288)) {
 256                 ret = pinctrl_request_noflags(pinctrl, PERIPH_ID_SDCARD);
 257                 if (ret) {
 258                         debug("%s: Failed to set up SD card\n", __func__);
 259                         goto err;
 260                 }
 261                 ret = configure_emmc(pinctrl);
 262                 if (ret) {
 263                         debug("%s: Failed to set up eMMC\n", __func__);
 264                         goto err;
 265                 }
 266         }
 267 #endif
 268
 269         /* Enable debug UART */
 270         ret = pinctrl_request_noflags(pinctrl, PERIPH_ID_UART_DBG);
 271         if (ret) {
 272                 debug("%s: Failed to set up console UART\n", __func__);
 273                 goto err;
 274         }
 275
 276         preloader_console_init();
 277         return;
 278 err:
 279         printf("spl_board_init: Error %d\n", ret);
 280
 281         /* No way to report error here */
 282         hang();
 283 }
 284
 285 void lowlevel_init(void)
 286 {
 287 }