linux-arkmicro/u-boot/board/atmel/sama5d4ek/sama5d4ek.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * Copyright (C) 2014 Atmel
 *		      Bo Shen <voice.shen@atmel.com>
 */

#include <common.h>
#include <asm/io.h>
#include <asm/arch/at91_common.h>
#include <asm/arch/at91_rstc.h>
#include <asm/arch/atmel_mpddrc.h>
#include <asm/arch/gpio.h>
#include <asm/arch/clk.h>
#include <asm/arch/sama5d3_smc.h>
#include <asm/arch/sama5d4.h>
#include <debug_uart.h>

DECLARE_GLOBAL_DATA_PTR;

#ifdef CONFIG_NAND_ATMEL
static void sama5d4ek_nand_hw_init(void)
{
	struct at91_smc *smc = (struct at91_smc *)ATMEL_BASE_SMC;

	at91_periph_clk_enable(ATMEL_ID_SMC);

	/* Configure SMC CS3 for NAND */
	writel(AT91_SMC_SETUP_NWE(1) | AT91_SMC_SETUP_NCS_WR(1) |
	       AT91_SMC_SETUP_NRD(1) | AT91_SMC_SETUP_NCS_RD(1),
	       &smc->cs[3].setup);
	writel(AT91_SMC_PULSE_NWE(2) | AT91_SMC_PULSE_NCS_WR(3) |
	       AT91_SMC_PULSE_NRD(2) | AT91_SMC_PULSE_NCS_RD(3),
	       &smc->cs[3].pulse);
	writel(AT91_SMC_CYCLE_NWE(5) | AT91_SMC_CYCLE_NRD(5),
	       &smc->cs[3].cycle);
	writel(AT91_SMC_TIMINGS_TCLR(2) | AT91_SMC_TIMINGS_TADL(7) |
	       AT91_SMC_TIMINGS_TAR(2)  | AT91_SMC_TIMINGS_TRR(3)   |
	       AT91_SMC_TIMINGS_TWB(7)  | AT91_SMC_TIMINGS_RBNSEL(3)|
	       AT91_SMC_TIMINGS_NFSEL(1), &smc->cs[3].timings);
	writel(AT91_SMC_MODE_RM_NRD | AT91_SMC_MODE_WM_NWE |
	       AT91_SMC_MODE_EXNW_DISABLE |
	       AT91_SMC_MODE_DBW_8 |
	       AT91_SMC_MODE_TDF_CYCLE(3),
	       &smc->cs[3].mode);

	at91_pio3_set_a_periph(AT91_PIO_PORTC, 5, 0);	/* D0 */
	at91_pio3_set_a_periph(AT91_PIO_PORTC, 6, 0);	/* D1 */
	at91_pio3_set_a_periph(AT91_PIO_PORTC, 7, 0);	/* D2 */
	at91_pio3_set_a_periph(AT91_PIO_PORTC, 8, 0);	/* D3 */
	at91_pio3_set_a_periph(AT91_PIO_PORTC, 9, 0);	/* D4 */
	at91_pio3_set_a_periph(AT91_PIO_PORTC, 10, 0);	/* D5 */
	at91_pio3_set_a_periph(AT91_PIO_PORTC, 11, 0);	/* D6 */
	at91_pio3_set_a_periph(AT91_PIO_PORTC, 12, 0);	/* D7 */
	at91_pio3_set_a_periph(AT91_PIO_PORTC, 13, 0);	/* RE */
	at91_pio3_set_a_periph(AT91_PIO_PORTC, 14, 0);	/* WE */
	at91_pio3_set_a_periph(AT91_PIO_PORTC, 15, 1);	/* NCS */
	at91_pio3_set_a_periph(AT91_PIO_PORTC, 16, 1);	/* RDY */
	at91_pio3_set_a_periph(AT91_PIO_PORTC, 17, 1);	/* ALE */
	at91_pio3_set_a_periph(AT91_PIO_PORTC, 18, 1);	/* CLE */
}
#endif

#ifdef CONFIG_CMD_USB
static void sama5d4ek_usb_hw_init(void)
{
	at91_set_pio_output(AT91_PIO_PORTE, 11, 0);
	at91_set_pio_output(AT91_PIO_PORTE, 12, 0);
	at91_set_pio_output(AT91_PIO_PORTE, 10, 0);
}
#endif

#ifdef CONFIG_BOARD_LATE_INIT
int board_late_init(void)
{
#ifdef CONFIG_DM_VIDEO
	at91_video_show_board_info();
#endif
	return 0;
}
#endif

#ifdef CONFIG_DEBUG_UART_BOARD_INIT
static void sama5d4ek_serial3_hw_init(void)
{
	at91_pio3_set_b_periph(AT91_PIO_PORTE, 17, 1);	/* TXD3 */
	at91_pio3_set_b_periph(AT91_PIO_PORTE, 16, 0);	/* RXD3 */

	/* Enable clock */
	at91_periph_clk_enable(ATMEL_ID_USART3);
}

void board_debug_uart_init(void)
{
	sama5d4ek_serial3_hw_init();
}
#endif

#ifdef CONFIG_BOARD_EARLY_INIT_F
int board_early_init_f(void)
{
#ifdef CONFIG_DEBUG_UART
	debug_uart_init();
#endif
	return 0;
}
#endif

int board_init(void)
{
	/* adress of boot parameters */
	gd->bd->bi_boot_params = CONFIG_SYS_SDRAM_BASE + 0x100;

#ifdef CONFIG_NAND_ATMEL
	sama5d4ek_nand_hw_init();
#endif
#ifdef CONFIG_CMD_USB
	sama5d4ek_usb_hw_init();
#endif

	return 0;
}

int dram_init(void)
{
	gd->ram_size = get_ram_size((void *)CONFIG_SYS_SDRAM_BASE,
				    CONFIG_SYS_SDRAM_SIZE);
	return 0;
}

/* SPL */
#ifdef CONFIG_SPL_BUILD
void spl_board_init(void)
{
#if CONFIG_NAND_BOOT
	sama5d4ek_nand_hw_init();
#endif
}

static void ddr2_conf(struct atmel_mpddrc_config *ddr2)
{
	ddr2->md = (ATMEL_MPDDRC_MD_DBW_32_BITS | ATMEL_MPDDRC_MD_DDR2_SDRAM);

	ddr2->cr = (ATMEL_MPDDRC_CR_NC_COL_10 |
		    ATMEL_MPDDRC_CR_NR_ROW_14 |
		    ATMEL_MPDDRC_CR_CAS_DDR_CAS3 |
		    ATMEL_MPDDRC_CR_NB_8BANKS |
		    ATMEL_MPDDRC_CR_DECOD_INTERLEAVED |
		    ATMEL_MPDDRC_CR_UNAL_SUPPORTED);

	ddr2->rtr = 0x2b0;

	ddr2->tpr0 = (8 << ATMEL_MPDDRC_TPR0_TRAS_OFFSET |
		      3 << ATMEL_MPDDRC_TPR0_TRCD_OFFSET |
		      3 << ATMEL_MPDDRC_TPR0_TWR_OFFSET |
		      10 << ATMEL_MPDDRC_TPR0_TRC_OFFSET |
		      3 << ATMEL_MPDDRC_TPR0_TRP_OFFSET |
		      2 << ATMEL_MPDDRC_TPR0_TRRD_OFFSET |
		      2 << ATMEL_MPDDRC_TPR0_TWTR_OFFSET |
		      2 << ATMEL_MPDDRC_TPR0_TMRD_OFFSET);

	ddr2->tpr1 = (2 << ATMEL_MPDDRC_TPR1_TXP_OFFSET |
		      200 << ATMEL_MPDDRC_TPR1_TXSRD_OFFSET |
		      25 << ATMEL_MPDDRC_TPR1_TXSNR_OFFSET |
		      23 << ATMEL_MPDDRC_TPR1_TRFC_OFFSET);

	ddr2->tpr2 = (7 << ATMEL_MPDDRC_TPR2_TFAW_OFFSET |
		      2 << ATMEL_MPDDRC_TPR2_TRTP_OFFSET |
		      3 << ATMEL_MPDDRC_TPR2_TRPA_OFFSET |
		      2 << ATMEL_MPDDRC_TPR2_TXARDS_OFFSET |
		      8 << ATMEL_MPDDRC_TPR2_TXARD_OFFSET);
}

void mem_init(void)
{
	struct atmel_mpddrc_config ddr2;
	const struct atmel_mpddr *mpddr = (struct atmel_mpddr *)ATMEL_BASE_MPDDRC;
	u32 tmp;

	ddr2_conf(&ddr2);

	/* Enable MPDDR clock */
	at91_periph_clk_enable(ATMEL_ID_MPDDRC);
	at91_system_clk_enable(AT91_PMC_DDR);

	tmp = ATMEL_MPDDRC_RD_DATA_PATH_SHIFT_ONE_CYCLE;
	writel(tmp, &mpddr->rd_data_path);

	tmp = readl(&mpddr->io_calibr);
	tmp = (tmp & ~(ATMEL_MPDDRC_IO_CALIBR_RDIV |
	       ATMEL_MPDDRC_IO_CALIBR_TZQIO |
	       ATMEL_MPDDRC_IO_CALIBR_CALCODEP |
	       ATMEL_MPDDRC_IO_CALIBR_CALCODEN)) |
	       ATMEL_MPDDRC_IO_CALIBR_DDR2_RZQ_52 |
	       ATMEL_MPDDRC_IO_CALIBR_TZQIO_(8) |
	       ATMEL_MPDDRC_IO_CALIBR_EN_CALIB;
	writel(tmp, &mpddr->io_calibr);

	/* DDRAM2 Controller initialize */
	ddr2_init(ATMEL_BASE_MPDDRC, ATMEL_BASE_DDRCS, &ddr2);
}

void at91_pmc_init(void)
{
	u32 tmp;

	tmp = AT91_PMC_PLLAR_29 |
	      AT91_PMC_PLLXR_PLLCOUNT(0x3f) |
	      AT91_PMC_PLLXR_MUL(87) |
	      AT91_PMC_PLLXR_DIV(1);
	at91_plla_init(tmp);

	at91_pllicpr_init(AT91_PMC_IPLL_PLLA(0x0));

	tmp = AT91_PMC_MCKR_H32MXDIV |
	      AT91_PMC_MCKR_PLLADIV_2 |
	      AT91_PMC_MCKR_MDIV_3 |
	      AT91_PMC_MCKR_CSS_PLLA;
	at91_mck_init(tmp);
}
#endif