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         const void *blob = gd->fdt_blob;
  33         struct udevice *dev;
  34         const char *bootdev;
  35         int node;
  36         int ret;
  37
  38         bootdev = fdtdec_get_config_string(blob, "u-boot,boot0");
  39         debug("Boot device %s\n", bootdev);
  40         if (!bootdev)
  41                 goto fallback;
  42
  43         node = fdt_path_offset(blob, bootdev);
  44         if (node < 0) {
  45                 debug("node=%d\n", node);
  46                 goto fallback;
  47         }
  48         ret = device_get_global_by_of_offset(node, &dev);
  49         if (ret) {
  50                 debug("device at node %s/%d not found: %d\n", bootdev, node,
  51                       ret);
  52                 goto fallback;
  53         }
  54         debug("Found device %s\n", dev->name);
  55         switch (device_get_uclass_id(dev)) {
  56         case UCLASS_SPI_FLASH:
  57                 return BOOT_DEVICE_SPI;
  58         case UCLASS_MMC:
  59                 return BOOT_DEVICE_MMC1;
  60         default:
  61                 debug("Booting from device uclass '%s' not supported\n",
  62                       dev_get_uclass_name(dev));
  63         }
  64
  65 fallback:
  66         return BOOT_DEVICE_MMC1;
  67 }
  68
  69 u32 spl_boot_mode(const u32 boot_device)
  70 {
  71         return MMCSD_MODE_RAW;
  72 }
  73
  74 /* read L2 control register (L2CTLR) */
  75 static inline uint32_t read_l2ctlr(void)
  76 {
  77         uint32_t val = 0;
  78
  79         asm volatile ("mrc p15, 1, %0, c9, c0, 2" : "=r" (val));
  80
  81         return val;
  82 }
  83
  84 /* write L2 control register (L2CTLR) */
  85 static inline void write_l2ctlr(uint32_t val)
  86 {
  87         /*
  88          * Note: L2CTLR can only be written when the L2 memory system
  89          * is idle, ie before the MMU is enabled.
  90          */
  91         asm volatile("mcr p15, 1, %0, c9, c0, 2" : : "r" (val) : "memory");
  92         isb();
  93 }
  94
  95 static void configure_l2ctlr(void)
  96 {
  97         uint32_t l2ctlr;
  98
  99         l2ctlr = read_l2ctlr();
 100         l2ctlr &= 0xfffc0000; /* clear bit0~bit17 */
 101
 102         /*
 103         * Data RAM write latency: 2 cycles
 104         * Data RAM read latency: 2 cycles
 105         * Data RAM setup latency: 1 cycle
 106         * Tag RAM write latency: 1 cycle
 107         * Tag RAM read latency: 1 cycle
 108         * Tag RAM setup latency: 1 cycle
 109         */
 110         l2ctlr |= (1 << 3 | 1 << 0);
 111         write_l2ctlr(l2ctlr);
 112 }
 113
 114 #ifdef CONFIG_SPL_MMC_SUPPORT
 115 static int configure_emmc(struct udevice *pinctrl)
 116 {
 117 #if !defined(CONFIG_TARGET_ROCK2) && !defined(CONFIG_TARGET_FIREFLY_RK3288)
 118         struct gpio_desc desc;
 119         int ret;
 120
 121         pinctrl_request_noflags(pinctrl, PERIPH_ID_EMMC);
 122
 123         /*
 124          * TODO(sjg@chromium.org): Pick this up from device tree or perhaps
 125          * use the EMMC_PWREN setting.
 126          */
 127         ret = dm_gpio_lookup_name("D9", &desc);
 128         if (ret) {
 129                 debug("gpio ret=%d\n", ret);
 130                 return ret;
 131         }
 132         ret = dm_gpio_request(&desc, "emmc_pwren");
 133         if (ret) {
 134                 debug("gpio_request ret=%d\n", ret);
 135                 return ret;
 136         }
 137         ret = dm_gpio_set_dir_flags(&desc, GPIOD_IS_OUT);
 138         if (ret) {
 139                 debug("gpio dir ret=%d\n", ret);
 140                 return ret;
 141         }
 142         ret = dm_gpio_set_value(&desc, 1);
 143         if (ret) {
 144                 debug("gpio value ret=%d\n", ret);
 145                 return ret;
 146         }
 147 #endif
 148
 149         return 0;
 150 }
 151 #endif
 152
 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 = uclass_get_device(UCLASS_CLK, 0, &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 }
 208
 209 static int setup_led(void)
 210 {
 211 #ifdef CONFIG_SPL_LED
 212         struct udevice *dev;
 213         char *led_name;
 214         int ret;
 215
 216         led_name = fdtdec_get_config_string(gd->fdt_blob, "u-boot,boot-led");
 217         if (!led_name)
 218                 return 0;
 219         ret = led_get_by_label(led_name, &dev);
 220         if (ret) {
 221                 debug("%s: get=%d\n", __func__, ret);
 222                 return ret;
 223         }
 224         ret = led_set_on(dev, 1);
 225         if (ret)
 226                 return ret;
 227 #endif
 228
 229         return 0;
 230 }
 231
 232 void spl_board_init(void)
 233 {
 234         struct udevice *pinctrl;
 235         int ret;
 236
 237         ret = setup_led();
 238
 239         if (ret) {
 240                 debug("LED ret=%d\n", ret);
 241                 hang();
 242         }
 243
 244         ret = uclass_get_device(UCLASS_PINCTRL, 0, &pinctrl);
 245         if (ret) {
 246                 debug("%s: Cannot find pinctrl device\n", __func__);
 247                 goto err;
 248         }
 249 #ifdef CONFIG_SPL_MMC_SUPPORT
 250         ret = pinctrl_request_noflags(pinctrl, PERIPH_ID_SDCARD);
 251         if (ret) {
 252                 debug("%s: Failed to set up SD card\n", __func__);
 253                 goto err;
 254         }
 255         ret = configure_emmc(pinctrl);
 256         if (ret) {
 257                 debug("%s: Failed to set up eMMC\n", __func__);
 258                 goto err;
 259         }
 260 #endif
 261
 262         /* Enable debug UART */
 263         ret = pinctrl_request_noflags(pinctrl, PERIPH_ID_UART_DBG);
 264         if (ret) {
 265                 debug("%s: Failed to set up console UART\n", __func__);
 266                 goto err;
 267         }
 268
 269         preloader_console_init();
 270         return;
 271 err:
 272         printf("spl_board_init: Error %d\n", ret);
 273
 274         /* No way to report error here */
 275         hang();
 276 }
 277
 278 void lowlevel_init(void)
 279 {
 280 }