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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2019 Microchip Technology Inc. and its subsidiaries
*
* Author: Nicolas Ferre <nicolas.ferre@microcihp.com>
*/
#include <common.h>
#include <debug_uart.h>
#include <init.h>
#include <asm/global_data.h>
#include <asm/io.h>
#include <asm/arch/at91_common.h>
#include <asm/arch/atmel_pio4.h>
#include <asm/arch/atmel_mpddrc.h>
#include <asm/arch/atmel_sdhci.h>
#include <asm/arch/clk.h>
#include <asm/arch/gpio.h>
#include <asm/arch/sama5d2.h>
extern void at91_pda_detect(void);
DECLARE_GLOBAL_DATA_PTR;
static void rgb_leds_init(void)
{
atmel_pio4_set_pio_output(AT91_PIO_PORTA, 6, 0); /* LED RED */
atmel_pio4_set_pio_output(AT91_PIO_PORTA, 7, 0); /* LED GREEN */
atmel_pio4_set_pio_output(AT91_PIO_PORTA, 8, 1); /* LED BLUE */
}
#ifdef CONFIG_BOARD_LATE_INIT
int board_late_init(void)
{
#ifdef CONFIG_VIDEO
at91_video_show_board_info();
#endif
at91_pda_detect();
return 0;
}
#endif
#ifdef CONFIG_DEBUG_UART_BOARD_INIT
static void board_uart0_hw_init(void)
{
atmel_pio4_set_c_periph(AT91_PIO_PORTB, 26, ATMEL_PIO_PUEN_MASK); /* URXD0 */
atmel_pio4_set_c_periph(AT91_PIO_PORTB, 27, 0); /* UTXD0 */
at91_periph_clk_enable(ATMEL_ID_UART0);
}
void board_debug_uart_init(void)
{
board_uart0_hw_init();
}
#endif
#ifdef CONFIG_BOARD_EARLY_INIT_F
int board_early_init_f(void)
{
return 0;
}
#endif
int board_init(void)
{
/* address of boot parameters */
gd->bd->bi_boot_params = CFG_SYS_SDRAM_BASE + 0x100;
rgb_leds_init();
return 0;
}
#ifdef CONFIG_MISC_INIT_R
int misc_init_r(void)
{
#ifdef CONFIG_SPI_FLASH_SFDP_SUPPORT
at91_spi_nor_set_ethaddr();
#endif
return 0;
}
#endif
int dram_init(void)
{
gd->ram_size = get_ram_size((void *)CFG_SYS_SDRAM_BASE,
CFG_SYS_SDRAM_SIZE);
return 0;
}
/* SPL */
#ifdef CONFIG_SPL_BUILD
static void board_leds_init(void)
{
atmel_pio4_set_pio_output(AT91_PIO_PORTA, 6, 0); /* RED */
atmel_pio4_set_pio_output(AT91_PIO_PORTA, 7, 1); /* GREEN */
atmel_pio4_set_pio_output(AT91_PIO_PORTA, 8, 0); /* BLUE */
}
#ifdef CONFIG_SD_BOOT
void spl_mmc_init(void)
{
atmel_pio4_set_a_periph(AT91_PIO_PORTA, 1, 0); /* CMD */
atmel_pio4_set_a_periph(AT91_PIO_PORTA, 2, 0); /* DAT0 */
atmel_pio4_set_a_periph(AT91_PIO_PORTA, 3, 0); /* DAT1 */
atmel_pio4_set_a_periph(AT91_PIO_PORTA, 4, 0); /* DAT2 */
atmel_pio4_set_a_periph(AT91_PIO_PORTA, 5, 0); /* DAT3 */
atmel_pio4_set_a_periph(AT91_PIO_PORTA, 0, 0); /* CK */
atmel_pio4_set_a_periph(AT91_PIO_PORTA, 13, 0); /* CD */
at91_periph_clk_enable(ATMEL_ID_SDMMC0);
}
#endif
#ifdef CONFIG_QSPI_BOOT
void spl_qspi_init(void)
{
atmel_pio4_set_d_periph(AT91_PIO_PORTB, 5, 0); /* SCK */
atmel_pio4_set_d_periph(AT91_PIO_PORTB, 6, 0); /* CS */
atmel_pio4_set_d_periph(AT91_PIO_PORTB, 7, 0); /* IO0 */
atmel_pio4_set_d_periph(AT91_PIO_PORTB, 8, 0); /* IO1 */
atmel_pio4_set_d_periph(AT91_PIO_PORTB, 9, 0); /* IO2 */
atmel_pio4_set_d_periph(AT91_PIO_PORTB, 10, 0); /* IO3 */
at91_periph_clk_enable(ATMEL_ID_QSPI1);
}
#endif
void spl_board_init(void)
{
board_leds_init();
#ifdef CONFIG_SD_BOOT
spl_mmc_init();
#endif
#ifdef CONFIG_QSPI_BOOT
spl_qspi_init();
#endif
}
void spl_display_print(void)
{
}
static void ddrc_conf(struct atmel_mpddrc_config *ddrc)
{
ddrc->md = (ATMEL_MPDDRC_MD_DBW_32_BITS | ATMEL_MPDDRC_MD_LPDDR2_SDRAM);
ddrc->cr = (ATMEL_MPDDRC_CR_NC_COL_9 |
ATMEL_MPDDRC_CR_NR_ROW_14 |
ATMEL_MPDDRC_CR_CAS_DDR_CAS3 |
ATMEL_MPDDRC_CR_ZQ_SHORT |
ATMEL_MPDDRC_CR_NB_8BANKS |
ATMEL_MPDDRC_CR_DECOD_INTERLEAVED |
ATMEL_MPDDRC_CR_UNAL_SUPPORTED);
ddrc->lpddr23_lpr = ATMEL_MPDDRC_LPDDR23_LPR_DS(0x3);
/*
* The AD220032D average time between REFRESH commands (Trefi): 3.9us
* 3.9us * 164MHz = 639.6 = 0x27F.
*/
ddrc->rtr = 0x27f;
/* Enable Adjust Refresh Rate */
ddrc->rtr |= ATMEL_MPDDRC_RTR_ADJ_REF;
ddrc->tpr0 = ((7 << ATMEL_MPDDRC_TPR0_TRAS_OFFSET) |
(3 << ATMEL_MPDDRC_TPR0_TRCD_OFFSET) |
(4 << ATMEL_MPDDRC_TPR0_TWR_OFFSET) |
(11 << ATMEL_MPDDRC_TPR0_TRC_OFFSET) |
(4 << ATMEL_MPDDRC_TPR0_TRP_OFFSET) |
(2 << ATMEL_MPDDRC_TPR0_TRRD_OFFSET) |
(2 << ATMEL_MPDDRC_TPR0_TWTR_OFFSET) |
(5 << ATMEL_MPDDRC_TPR0_TMRD_OFFSET));
ddrc->tpr1 = ((21 << ATMEL_MPDDRC_TPR1_TRFC_OFFSET) |
(0 << ATMEL_MPDDRC_TPR1_TXSNR_OFFSET) |
(23 << ATMEL_MPDDRC_TPR1_TXSRD_OFFSET) |
(2 << ATMEL_MPDDRC_TPR1_TXP_OFFSET));
ddrc->tpr2 = ((0 << ATMEL_MPDDRC_TPR2_TXARD_OFFSET) |
(0 << ATMEL_MPDDRC_TPR2_TXARDS_OFFSET) |
(4 << ATMEL_MPDDRC_TPR2_TRPA_OFFSET) |
(2 << ATMEL_MPDDRC_TPR2_TRTP_OFFSET) |
(10 << ATMEL_MPDDRC_TPR2_TFAW_OFFSET));
ddrc->tim_cal = ATMEL_MPDDRC_CALR_ZQCS(15);
/*
* According to the sama5d2 datasheet and the following values:
* T Sens = 0.75%/C, V Sens = 0.2%/mV, T driftrate = 1C/sec and V driftrate = 15 mV/s
* Warning: note that the values T driftrate and V driftrate are dependent on
* the application environment.
* ZQCS period is 1.5 / ((0.75 x 1) + (0.2 x 15)) = 0.4s
* If Trefi is 3.9us, we have: 400000 / 3.9 = 102564: we can maximize
* this timer to 0xFFFE.
*/
ddrc->cal_mr4 = ATMEL_MPDDRC_CAL_MR4_COUNT_CAL(0xFFFE);
/*
* MR4 Read interval is dependent on the application environment.
* Here, we want to maximize this value as temperature is supposed
* to vary slowly in the application chosen.
* If Trefi is 3.9us, we have:
* (0xFFFE) 65534 x 3.9 = 0.25s between MR4 reads.
*/
ddrc->cal_mr4 |= ATMEL_MPDDRC_CAL_MR4_MR4R(0xFFFE);
}
void mem_init(void)
{
struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
struct atmel_mpddr *mpddrc = (struct atmel_mpddr *)ATMEL_BASE_MPDDRC;
struct atmel_mpddrc_config ddrc_config;
u32 reg;
at91_periph_clk_enable(ATMEL_ID_MPDDRC);
writel(AT91_PMC_DDR, &pmc->scer);
ddrc_conf(&ddrc_config);
reg = readl(&mpddrc->io_calibr);
reg &= ~ATMEL_MPDDRC_IO_CALIBR_RDIV;
reg |= ATMEL_MPDDRC_IO_CALIBR_LPDDR2_RZQ_48;
reg &= ~ATMEL_MPDDRC_IO_CALIBR_TZQIO;
reg |= ATMEL_MPDDRC_IO_CALIBR_TZQIO_(100);
writel(reg, &mpddrc->io_calibr);
writel(ATMEL_MPDDRC_RD_DATA_PATH_SHIFT_ONE_CYCLE,
&mpddrc->rd_data_path);
lpddr2_init(ATMEL_BASE_MPDDRC, ATMEL_BASE_DDRCS, &ddrc_config);
}
void at91_pmc_init(void)
{
u32 tmp;
/*
* while coming from the ROM code, we run on PLLA @ 492 MHz / 164 MHz
* so we need to slow down and configure MCKR accordingly.
* This is why we have a special flavor of the switching function.
*/
tmp = AT91_PMC_MCKR_PLLADIV_2 |
AT91_PMC_MCKR_MDIV_3 |
AT91_PMC_MCKR_CSS_MAIN;
at91_mck_init_down(tmp);
tmp = AT91_PMC_PLLAR_29 |
AT91_PMC_PLLXR_PLLCOUNT(0x3f) |
AT91_PMC_PLLXR_MUL(40) |
AT91_PMC_PLLXR_DIV(1);
at91_plla_init(tmp);
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
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