2 * (C) Copyright 2015 Google, Inc
4 * SPDX-License-Identifier: GPL-2.0+
8 #include <debug_uart.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>
26 #include <power/regulator.h>
28 DECLARE_GLOBAL_DATA_PTR;
30 u32 spl_boot_device(void)
32 #if !CONFIG_IS_ENABLED(OF_PLATDATA)
33 const void *blob = gd->fdt_blob;
39 bootdev = fdtdec_get_config_string(blob, "u-boot,boot0");
40 debug("Boot device %s\n", bootdev);
44 node = fdt_path_offset(blob, bootdev);
46 debug("node=%d\n", node);
49 ret = device_get_global_by_of_offset(node, &dev);
51 debug("device at node %s/%d not found: %d\n", bootdev, node,
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;
60 return BOOT_DEVICE_MMC1;
62 debug("Booting from device uclass '%s' not supported\n",
63 dev_get_uclass_name(dev));
68 return BOOT_DEVICE_MMC1;
71 u32 spl_boot_mode(const u32 boot_device)
73 return MMCSD_MODE_RAW;
76 /* read L2 control register (L2CTLR) */
77 static inline uint32_t read_l2ctlr(void)
81 asm volatile ("mrc p15, 1, %0, c9, c0, 2" : "=r" (val));
86 /* write L2 control register (L2CTLR) */
87 static inline void write_l2ctlr(uint32_t val)
90 * Note: L2CTLR can only be written when the L2 memory system
91 * is idle, ie before the MMU is enabled.
93 asm volatile("mcr p15, 1, %0, c9, c0, 2" : : "r" (val) : "memory");
97 static void configure_l2ctlr(void)
101 l2ctlr = read_l2ctlr();
102 l2ctlr &= 0xfffc0000; /* clear bit0~bit17 */
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
112 l2ctlr |= (1 << 3 | 1 << 0);
113 write_l2ctlr(l2ctlr);
116 #ifdef CONFIG_SPL_MMC_SUPPORT
117 static int configure_emmc(struct udevice *pinctrl)
119 #if defined(CONFIG_TARGET_CHROMEBOOK_JERRY)
121 struct gpio_desc desc;
124 pinctrl_request_noflags(pinctrl, PERIPH_ID_EMMC);
127 * TODO(sjg@chromium.org): Pick this up from device tree or perhaps
128 * use the EMMC_PWREN setting.
130 ret = dm_gpio_lookup_name("D9", &desc);
132 debug("gpio ret=%d\n", ret);
135 ret = dm_gpio_request(&desc, "emmc_pwren");
137 debug("gpio_request ret=%d\n", ret);
140 ret = dm_gpio_set_dir_flags(&desc, GPIOD_IS_OUT);
142 debug("gpio dir ret=%d\n", ret);
145 ret = dm_gpio_set_value(&desc, 1);
147 debug("gpio value ret=%d\n", ret);
154 extern void back_to_bootrom(void);
155 void board_init_f(ulong dummy)
157 struct udevice *pinctrl;
161 /* Example code showing how to enable the debug UART on RK3288 */
163 #include <asm/arch/grf_rk3288.h>
164 /* Enable early UART on the RK3288 */
165 #define GRF_BASE 0xff770000
166 struct rk3288_grf * const grf = (void *)GRF_BASE;
168 rk_clrsetreg(&grf->gpio7ch_iomux, GPIO7C7_MASK << GPIO7C7_SHIFT |
169 GPIO7C6_MASK << GPIO7C6_SHIFT,
170 GPIO7C7_UART2DBG_SOUT << GPIO7C7_SHIFT |
171 GPIO7C6_UART2DBG_SIN << GPIO7C6_SHIFT);
173 * Debug UART can be used from here if required:
178 * printascii("string");
185 debug("spl_init() failed: %d\n", ret);
189 rockchip_timer_init();
192 ret = rockchip_get_clk(&dev);
194 debug("CLK init failed: %d\n", ret);
198 ret = uclass_get_device(UCLASS_PINCTRL, 0, &pinctrl);
200 debug("Pinctrl init failed: %d\n", ret);
204 ret = uclass_get_device(UCLASS_RAM, 0, &dev);
206 debug("DRAM init failed: %d\n", ret);
209 #ifdef CONFIG_ROCKCHIP_SPL_BACK_TO_BROM
214 static int setup_led(void)
216 #ifdef CONFIG_SPL_LED
221 led_name = fdtdec_get_config_string(gd->fdt_blob, "u-boot,boot-led");
224 ret = led_get_by_label(led_name, &dev);
226 debug("%s: get=%d\n", __func__, ret);
229 ret = led_set_on(dev, 1);
237 void spl_board_init(void)
239 struct udevice *pinctrl;
245 debug("LED ret=%d\n", ret);
249 ret = uclass_get_device(UCLASS_PINCTRL, 0, &pinctrl);
251 debug("%s: Cannot find pinctrl device\n", __func__);
255 #ifdef CONFIG_SPL_MMC_SUPPORT
256 ret = pinctrl_request_noflags(pinctrl, PERIPH_ID_SDCARD);
258 debug("%s: Failed to set up SD card\n", __func__);
261 ret = configure_emmc(pinctrl);
263 debug("%s: Failed to set up eMMC\n", __func__);
268 /* Enable debug UART */
269 ret = pinctrl_request_noflags(pinctrl, PERIPH_ID_UART_DBG);
271 debug("%s: Failed to set up console UART\n", __func__);
275 preloader_console_init();
278 printf("spl_board_init: Error %d\n", ret);
280 /* No way to report error here */
284 void lowlevel_init(void)