1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright (C) 2019 Microchip Technology Inc. and its subsidiaries
5 * Author: Nicolas Ferre <nicolas.ferre@microcihp.com>
9 #include <debug_uart.h>
12 #include <asm/arch/at91_common.h>
13 #include <asm/arch/atmel_pio4.h>
14 #include <asm/arch/atmel_mpddrc.h>
15 #include <asm/arch/atmel_sdhci.h>
16 #include <asm/arch/clk.h>
17 #include <asm/arch/gpio.h>
18 #include <asm/arch/sama5d2.h>
20 extern void at91_pda_detect(void);
22 DECLARE_GLOBAL_DATA_PTR;
24 #ifdef CONFIG_BOARD_LATE_INIT
25 int board_late_init(void)
27 #ifdef CONFIG_DM_VIDEO
28 at91_video_show_board_info();
35 #ifdef CONFIG_DEBUG_UART_BOARD_INIT
36 static void board_uart0_hw_init(void)
38 atmel_pio4_set_c_periph(AT91_PIO_PORTB, 26, ATMEL_PIO_PUEN_MASK); /* URXD0 */
39 atmel_pio4_set_c_periph(AT91_PIO_PORTB, 27, 0); /* UTXD0 */
41 at91_periph_clk_enable(ATMEL_ID_UART0);
44 void board_debug_uart_init(void)
46 board_uart0_hw_init();
50 #ifdef CONFIG_BOARD_EARLY_INIT_F
51 int board_early_init_f(void)
53 #ifdef CONFIG_DEBUG_UART
63 /* address of boot parameters */
64 gd->bd->bi_boot_params = CONFIG_SYS_SDRAM_BASE + 0x100;
69 #ifdef CONFIG_MISC_INIT_R
72 #ifdef CONFIG_SPI_FLASH_SFDP_SUPPORT
73 at91_spi_nor_set_ethaddr();
81 gd->ram_size = get_ram_size((void *)CONFIG_SYS_SDRAM_BASE,
82 CONFIG_SYS_SDRAM_SIZE);
87 #ifdef CONFIG_SPL_BUILD
89 static void board_leds_init(void)
91 atmel_pio4_set_pio_output(AT91_PIO_PORTA, 6, 0); /* RED */
92 atmel_pio4_set_pio_output(AT91_PIO_PORTA, 7, 1); /* GREEN */
93 atmel_pio4_set_pio_output(AT91_PIO_PORTA, 8, 0); /* BLUE */
97 void spl_mmc_init(void)
99 atmel_pio4_set_a_periph(AT91_PIO_PORTA, 1, 0); /* CMD */
100 atmel_pio4_set_a_periph(AT91_PIO_PORTA, 2, 0); /* DAT0 */
101 atmel_pio4_set_a_periph(AT91_PIO_PORTA, 3, 0); /* DAT1 */
102 atmel_pio4_set_a_periph(AT91_PIO_PORTA, 4, 0); /* DAT2 */
103 atmel_pio4_set_a_periph(AT91_PIO_PORTA, 5, 0); /* DAT3 */
104 atmel_pio4_set_a_periph(AT91_PIO_PORTA, 0, 0); /* CK */
105 atmel_pio4_set_a_periph(AT91_PIO_PORTA, 13, 0); /* CD */
107 at91_periph_clk_enable(ATMEL_ID_SDMMC0);
111 #ifdef CONFIG_QSPI_BOOT
112 void spl_qspi_init(void)
114 atmel_pio4_set_d_periph(AT91_PIO_PORTB, 5, 0); /* SCK */
115 atmel_pio4_set_d_periph(AT91_PIO_PORTB, 6, 0); /* CS */
116 atmel_pio4_set_d_periph(AT91_PIO_PORTB, 7, 0); /* IO0 */
117 atmel_pio4_set_d_periph(AT91_PIO_PORTB, 8, 0); /* IO1 */
118 atmel_pio4_set_d_periph(AT91_PIO_PORTB, 9, 0); /* IO2 */
119 atmel_pio4_set_d_periph(AT91_PIO_PORTB, 10, 0); /* IO3 */
121 at91_periph_clk_enable(ATMEL_ID_QSPI1);
125 void spl_board_init(void)
128 #ifdef CONFIG_SD_BOOT
131 #ifdef CONFIG_QSPI_BOOT
136 void spl_display_print(void)
140 static void ddrc_conf(struct atmel_mpddrc_config *ddrc)
142 ddrc->md = (ATMEL_MPDDRC_MD_DBW_32_BITS | ATMEL_MPDDRC_MD_LPDDR2_SDRAM);
144 ddrc->cr = (ATMEL_MPDDRC_CR_NC_COL_9 |
145 ATMEL_MPDDRC_CR_NR_ROW_14 |
146 ATMEL_MPDDRC_CR_CAS_DDR_CAS3 |
147 ATMEL_MPDDRC_CR_ZQ_SHORT |
148 ATMEL_MPDDRC_CR_NB_8BANKS |
149 ATMEL_MPDDRC_CR_DECOD_INTERLEAVED |
150 ATMEL_MPDDRC_CR_UNAL_SUPPORTED);
152 ddrc->lpddr23_lpr = ATMEL_MPDDRC_LPDDR23_LPR_DS(0x3);
155 * The AD220032D average time between REFRESH commands (Trefi): 3.9us
156 * 3.9us * 164MHz = 639.6 = 0x27F.
159 /* Enable Adjust Refresh Rate */
160 ddrc->rtr |= ATMEL_MPDDRC_RTR_ADJ_REF;
162 ddrc->tpr0 = ((7 << ATMEL_MPDDRC_TPR0_TRAS_OFFSET) |
163 (3 << ATMEL_MPDDRC_TPR0_TRCD_OFFSET) |
164 (4 << ATMEL_MPDDRC_TPR0_TWR_OFFSET) |
165 (11 << ATMEL_MPDDRC_TPR0_TRC_OFFSET) |
166 (4 << ATMEL_MPDDRC_TPR0_TRP_OFFSET) |
167 (2 << ATMEL_MPDDRC_TPR0_TRRD_OFFSET) |
168 (2 << ATMEL_MPDDRC_TPR0_TWTR_OFFSET) |
169 (5 << ATMEL_MPDDRC_TPR0_TMRD_OFFSET));
171 ddrc->tpr1 = ((21 << ATMEL_MPDDRC_TPR1_TRFC_OFFSET) |
172 (0 << ATMEL_MPDDRC_TPR1_TXSNR_OFFSET) |
173 (23 << ATMEL_MPDDRC_TPR1_TXSRD_OFFSET) |
174 (2 << ATMEL_MPDDRC_TPR1_TXP_OFFSET));
176 ddrc->tpr2 = ((0 << ATMEL_MPDDRC_TPR2_TXARD_OFFSET) |
177 (0 << ATMEL_MPDDRC_TPR2_TXARDS_OFFSET) |
178 (4 << ATMEL_MPDDRC_TPR2_TRPA_OFFSET) |
179 (2 << ATMEL_MPDDRC_TPR2_TRTP_OFFSET) |
180 (10 << ATMEL_MPDDRC_TPR2_TFAW_OFFSET));
182 ddrc->tim_cal = ATMEL_MPDDRC_CALR_ZQCS(15);
185 * According to the sama5d2 datasheet and the following values:
186 * T Sens = 0.75%/C, V Sens = 0.2%/mV, T driftrate = 1C/sec and V driftrate = 15 mV/s
187 * Warning: note that the values T driftrate and V driftrate are dependent on
188 * the application environment.
189 * ZQCS period is 1.5 / ((0.75 x 1) + (0.2 x 15)) = 0.4s
190 * If Trefi is 3.9us, we have: 400000 / 3.9 = 102564: we can maximize
191 * this timer to 0xFFFE.
193 ddrc->cal_mr4 = ATMEL_MPDDRC_CAL_MR4_COUNT_CAL(0xFFFE);
196 * MR4 Read interval is dependent on the application environment.
197 * Here, we want to maximize this value as temperature is supposed
198 * to vary slowly in the application chosen.
199 * If Trefi is 3.9us, we have:
200 * (0xFFFE) 65534 x 3.9 = 0.25s between MR4 reads.
202 ddrc->cal_mr4 |= ATMEL_MPDDRC_CAL_MR4_MR4R(0xFFFE);
207 struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
208 struct atmel_mpddr *mpddrc = (struct atmel_mpddr *)ATMEL_BASE_MPDDRC;
209 struct atmel_mpddrc_config ddrc_config;
212 at91_periph_clk_enable(ATMEL_ID_MPDDRC);
213 writel(AT91_PMC_DDR, &pmc->scer);
215 ddrc_conf(&ddrc_config);
217 reg = readl(&mpddrc->io_calibr);
218 reg &= ~ATMEL_MPDDRC_IO_CALIBR_RDIV;
219 reg |= ATMEL_MPDDRC_IO_CALIBR_LPDDR2_RZQ_48;
220 reg &= ~ATMEL_MPDDRC_IO_CALIBR_TZQIO;
221 reg |= ATMEL_MPDDRC_IO_CALIBR_TZQIO_(100);
222 writel(reg, &mpddrc->io_calibr);
224 writel(ATMEL_MPDDRC_RD_DATA_PATH_SHIFT_ONE_CYCLE,
225 &mpddrc->rd_data_path);
227 lpddr2_init(ATMEL_BASE_MPDDRC, ATMEL_BASE_DDRCS, &ddrc_config);
230 void at91_pmc_init(void)
235 * while coming from the ROM code, we run on PLLA @ 492 MHz / 164 MHz
236 * so we need to slow down and configure MCKR accordingly.
237 * This is why we have a special flavor of the switching function.
239 tmp = AT91_PMC_MCKR_PLLADIV_2 |
240 AT91_PMC_MCKR_MDIV_3 |
241 AT91_PMC_MCKR_CSS_MAIN;
242 at91_mck_init_down(tmp);
244 tmp = AT91_PMC_PLLAR_29 |
245 AT91_PMC_PLLXR_PLLCOUNT(0x3f) |
246 AT91_PMC_PLLXR_MUL(40) |
247 AT91_PMC_PLLXR_DIV(1);
250 tmp = AT91_PMC_MCKR_H32MXDIV |
251 AT91_PMC_MCKR_PLLADIV_2 |
252 AT91_PMC_MCKR_MDIV_3 |
253 AT91_PMC_MCKR_CSS_PLLA;