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/*
* Copyright (c) 2018 Rockchip Electronics Co., Ltd
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <asm/io.h>
#include <asm/arch/grf_rk3308.h>
#include <asm/arch/hardware.h>
#include <asm/gpio.h>
#include <debug_uart.h>
#ifdef CONFIG_ARM64
#include <asm/armv8/mmu.h>
static struct mm_region rk3308_mem_map[] = {
{
.virt = 0x0UL,
.phys = 0x0UL,
.size = 0xff000000UL,
.attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) |
PTE_BLOCK_INNER_SHARE
}, {
.virt = 0xff000000UL,
.phys = 0xff000000UL,
.size = 0x01000000UL,
.attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) |
PTE_BLOCK_NON_SHARE |
PTE_BLOCK_PXN | PTE_BLOCK_UXN
}, {
/* List terminator */
0,
}
};
struct mm_region *mem_map = rk3308_mem_map;
#endif
#define GRF_BASE 0xff000000
enum {
GPIO1C7_SHIFT = 8,
GPIO1C7_MASK = GENMASK(11, 8),
GPIO1C7_GPIO = 0,
GPIO1C7_UART1_RTSN,
GPIO1C7_UART2_TX_M0,
GPIO1C7_SPI2_MOSI,
GPIO1C7_JTAG_TMS,
GPIO1C6_SHIFT = 4,
GPIO1C6_MASK = GENMASK(7, 4),
GPIO1C6_GPIO = 0,
GPIO1C6_UART1_CTSN,
GPIO1C6_UART2_RX_M0,
GPIO1C6_SPI2_MISO,
GPIO1C6_JTAG_TCLK,
GPIO4D3_SHIFT = 6,
GPIO4D3_MASK = GENMASK(7, 6),
GPIO4D3_GPIO = 0,
GPIO4D3_SDMMC_D3,
GPIO4D3_UART2_TX_M1,
GPIO4D2_SHIFT = 4,
GPIO4D2_MASK = GENMASK(5, 4),
GPIO4D2_GPIO = 0,
GPIO4D2_SDMMC_D2,
GPIO4D2_UART2_RX_M1,
UART2_IO_SEL_SHIFT = 2,
UART2_IO_SEL_MASK = GENMASK(3, 2),
UART2_IO_SEL_M0 = 0,
UART2_IO_SEL_M1,
UART2_IO_SEL_USB,
};
enum {
IOVSEL3_CTRL_SHIFT = 8,
IOVSEL3_CTRL_MASK = BIT(8),
VCCIO3_SEL_BY_GPIO = 0,
VCCIO3_SEL_BY_IOVSEL3,
IOVSEL3_SHIFT = 3,
IOVSEL3_MASK = BIT(3),
VCCIO3_3V3 = 0,
VCCIO3_1V8,
};
/*
* The voltage of VCCIO3(which is the voltage domain of emmc/flash/sfc
* interface) can indicated by GPIO0_A4 or io_vsel3. The SOC defaults
* use GPIO0_A4 to indicate power supply voltage for VCCIO3 by hardware,
* then we can switch to io_vsel3 after system power on, and release GPIO0_A4
* for other usage.
*/
#define GPIO0_A4 4
int rk_board_init(void)
{
static struct rk3308_grf * const grf = (void *)GRF_BASE;
u32 val;
int ret;
ret = gpio_request(GPIO0_A4, "gpio0_a4");
if (ret < 0) {
printf("request for gpio0_a4 failed:%d\n", ret);
return 0;
}
gpio_direction_input(GPIO0_A4);
if (gpio_get_value(GPIO0_A4))
val = VCCIO3_SEL_BY_IOVSEL3 << IOVSEL3_CTRL_SHIFT |
VCCIO3_1V8 << IOVSEL3_SHIFT;
else
val = VCCIO3_SEL_BY_IOVSEL3 << IOVSEL3_CTRL_SHIFT |
VCCIO3_3V3 << IOVSEL3_SHIFT;
rk_clrsetreg(&grf->soc_con0, IOVSEL3_CTRL_MASK | IOVSEL3_MASK, val);
return 0;
}
void board_debug_uart_init(void)
{
static struct rk3308_grf * const grf = (void *)GRF_BASE;
/* Enable early UART2 channel m1 on the rk3308 */
rk_clrsetreg(&grf->soc_con5, UART2_IO_SEL_MASK,
UART2_IO_SEL_M1 << UART2_IO_SEL_SHIFT);
rk_clrsetreg(&grf->gpio4d_iomux,
GPIO4D3_MASK | GPIO4D2_MASK,
GPIO4D2_UART2_RX_M1 << GPIO4D2_SHIFT |
GPIO4D3_UART2_TX_M1 << GPIO4D3_SHIFT);
}
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