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/*
* (C) Copyright 2015 Google, Inc
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <debug_uart.h>
#include <dm.h>
#include <fdtdec.h>
#include <led.h>
#include <malloc.h>
#include <ram.h>
#include <spl.h>
#include <asm/gpio.h>
#include <asm/io.h>
#include <asm/arch/clock.h>
#include <asm/arch/hardware.h>
#include <asm/arch/periph.h>
#include <asm/arch/sdram.h>
#include <asm/arch/timer.h>
#include <dm/pinctrl.h>
#include <dm/root.h>
#include <dm/test.h>
#include <dm/util.h>
#include <power/regulator.h>
DECLARE_GLOBAL_DATA_PTR;
u32 spl_boot_device(void)
{
const void *blob = gd->fdt_blob;
struct udevice *dev;
const char *bootdev;
int node;
int ret;
bootdev = fdtdec_get_config_string(blob, "u-boot,boot0");
debug("Boot device %s\n", bootdev);
if (!bootdev)
goto fallback;
node = fdt_path_offset(blob, bootdev);
if (node < 0) {
debug("node=%d\n", node);
goto fallback;
}
ret = device_get_global_by_of_offset(node, &dev);
if (ret) {
debug("device at node %s/%d not found: %d\n", bootdev, node,
ret);
goto fallback;
}
debug("Found device %s\n", dev->name);
switch (device_get_uclass_id(dev)) {
case UCLASS_SPI_FLASH:
return BOOT_DEVICE_SPI;
case UCLASS_MMC:
return BOOT_DEVICE_MMC1;
default:
debug("Booting from device uclass '%s' not supported\n",
dev_get_uclass_name(dev));
}
fallback:
return BOOT_DEVICE_MMC1;
}
u32 spl_boot_mode(void)
{
return MMCSD_MODE_RAW;
}
/* read L2 control register (L2CTLR) */
static inline uint32_t read_l2ctlr(void)
{
uint32_t val = 0;
asm volatile ("mrc p15, 1, %0, c9, c0, 2" : "=r" (val));
return val;
}
/* write L2 control register (L2CTLR) */
static inline void write_l2ctlr(uint32_t val)
{
/*
* Note: L2CTLR can only be written when the L2 memory system
* is idle, ie before the MMU is enabled.
*/
asm volatile("mcr p15, 1, %0, c9, c0, 2" : : "r" (val) : "memory");
isb();
}
static void configure_l2ctlr(void)
{
uint32_t l2ctlr;
l2ctlr = read_l2ctlr();
l2ctlr &= 0xfffc0000; /* clear bit0~bit17 */
/*
* Data RAM write latency: 2 cycles
* Data RAM read latency: 2 cycles
* Data RAM setup latency: 1 cycle
* Tag RAM write latency: 1 cycle
* Tag RAM read latency: 1 cycle
* Tag RAM setup latency: 1 cycle
*/
l2ctlr |= (1 << 3 | 1 << 0);
write_l2ctlr(l2ctlr);
}
static int configure_emmc(struct udevice *pinctrl)
{
#ifdef CONFIG_SPL_MMC_SUPPORT
struct gpio_desc desc;
int ret;
pinctrl_request_noflags(pinctrl, PERIPH_ID_EMMC);
/*
* TODO(sjg@chromium.org): Pick this up from device tree or perhaps
* use the EMMC_PWREN setting.
*/
ret = dm_gpio_lookup_name("D9", &desc);
if (ret) {
debug("gpio ret=%d\n", ret);
return ret;
}
ret = dm_gpio_request(&desc, "emmc_pwren");
if (ret) {
debug("gpio_request ret=%d\n", ret);
return ret;
}
ret = dm_gpio_set_dir_flags(&desc, GPIOD_IS_OUT);
if (ret) {
debug("gpio dir ret=%d\n", ret);
return ret;
}
ret = dm_gpio_set_value(&desc, 1);
if (ret) {
debug("gpio value ret=%d\n", ret);
return ret;
}
#endif
return 0;
}
void board_init_f(ulong dummy)
{
struct udevice *pinctrl;
struct udevice *dev;
int ret;
/* Example code showing how to enable the debug UART on RK3288 */
#ifdef EARLY_UART
#include <asm/arch/grf_rk3288.h>
/* Enable early UART on the RK3288 */
#define GRF_BASE 0xff770000
struct rk3288_grf * const grf = (void *)GRF_BASE;
rk_clrsetreg(&grf->gpio7ch_iomux, GPIO7C7_MASK << GPIO7C7_SHIFT |
GPIO7C6_MASK << GPIO7C6_SHIFT,
GPIO7C7_UART2DBG_SOUT << GPIO7C7_SHIFT |
GPIO7C6_UART2DBG_SIN << GPIO7C6_SHIFT);
/*
* Debug UART can be used from here if required:
*
* debug_uart_init();
* printch('a');
* printhex8(0x1234);
* printascii("string");
*/
debug_uart_init();
#endif
ret = spl_init();
if (ret) {
debug("spl_init() failed: %d\n", ret);
hang();
}
rockchip_timer_init();
configure_l2ctlr();
ret = uclass_get_device(UCLASS_CLK, 0, &dev);
if (ret) {
debug("CLK init failed: %d\n", ret);
return;
}
ret = uclass_get_device(UCLASS_PINCTRL, 0, &pinctrl);
if (ret) {
debug("Pinctrl init failed: %d\n", ret);
return;
}
ret = uclass_get_device(UCLASS_RAM, 0, &dev);
if (ret) {
debug("DRAM init failed: %d\n", ret);
return;
}
}
static int setup_led(void)
{
#ifdef CONFIG_SPL_LED
struct udevice *dev;
char *led_name;
int ret;
led_name = fdtdec_get_config_string(gd->fdt_blob, "u-boot,boot-led");
if (!led_name)
return 0;
ret = led_get_by_label(led_name, &dev);
if (ret) {
debug("%s: get=%d\n", __func__, ret);
return ret;
}
ret = led_set_on(dev, 1);
if (ret)
return ret;
#endif
return 0;
}
void spl_board_init(void)
{
struct udevice *pinctrl;
int ret;
ret = setup_led();
if (ret) {
debug("LED ret=%d\n", ret);
hang();
}
ret = uclass_get_device(UCLASS_PINCTRL, 0, &pinctrl);
if (ret) {
debug("%s: Cannot find pinctrl device\n", __func__);
goto err;
}
ret = pinctrl_request_noflags(pinctrl, PERIPH_ID_SDCARD);
if (ret) {
debug("%s: Failed to set up SD card\n", __func__);
goto err;
}
ret = configure_emmc(pinctrl);
if (ret) {
debug("%s: Failed to set up eMMC\n", __func__);
goto err;
}
/* Enable debug UART */
ret = pinctrl_request_noflags(pinctrl, PERIPH_ID_UART_DBG);
if (ret) {
debug("%s: Failed to set up console UART\n", __func__);
goto err;
}
preloader_console_init();
return;
err:
printf("spl_board_init: Error %d\n", ret);
/* No way to report error here */
hang();
}
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