board/atmel/sama5d2_xplained/sama5d2_xplained.c

   1 /*
   2  * Copyright (C) 2015 Atmel Corporation
   3  *                    Wenyou.Yang <wenyou.yang@atmel.com>
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7
   8 #include <common.h>
   9 #include <debug_uart.h>
  10 #include <asm/io.h>
  11 #include <asm/arch/at91_common.h>
  12 #include <asm/arch/atmel_pio4.h>
  13 #include <asm/arch/atmel_mpddrc.h>
  14 #include <asm/arch/atmel_sdhci.h>
  15 #include <asm/arch/clk.h>
  16 #include <asm/arch/gpio.h>
  17 #include <asm/arch/sama5d2.h>
  18
  19 DECLARE_GLOBAL_DATA_PTR;
  20
  21 static void board_usb_hw_init(void)
  22 {
  23         atmel_pio4_set_pio_output(AT91_PIO_PORTB, 10, 1);
  24 }
  25
  26 #ifdef CONFIG_BOARD_LATE_INIT
  27 int board_late_init(void)
  28 {
  29 #ifdef CONFIG_DM_VIDEO
  30         at91_video_show_board_info();
  31 #endif
  32         return 0;
  33 }
  34 #endif
  35
  36 #ifdef CONFIG_DEBUG_UART_BOARD_INIT
  37 static void board_uart1_hw_init(void)
  38 {
  39         atmel_pio4_set_a_periph(AT91_PIO_PORTD, 2, 1);  /* URXD1 */
  40         atmel_pio4_set_a_periph(AT91_PIO_PORTD, 3, 0);  /* UTXD1 */
  41
  42         at91_periph_clk_enable(ATMEL_ID_UART1);
  43 }
  44
  45 void board_debug_uart_init(void)
  46 {
  47         board_uart1_hw_init();
  48 }
  49 #endif
  50
  51 #ifdef CONFIG_BOARD_EARLY_INIT_F
  52 int board_early_init_f(void)
  53 {
  54 #ifdef CONFIG_DEBUG_UART
  55         debug_uart_init();
  56 #endif
  57
  58         return 0;
  59 }
  60 #endif
  61
  62 int board_init(void)
  63 {
  64         /* address of boot parameters */
  65         gd->bd->bi_boot_params = CONFIG_SYS_SDRAM_BASE + 0x100;
  66
  67 #ifdef CONFIG_CMD_USB
  68         board_usb_hw_init();
  69 #endif
  70
  71         return 0;
  72 }
  73
  74 int dram_init(void)
  75 {
  76         gd->ram_size = get_ram_size((void *)CONFIG_SYS_SDRAM_BASE,
  77                                     CONFIG_SYS_SDRAM_SIZE);
  78         return 0;
  79 }
  80
  81 #define AT24MAC_MAC_OFFSET      0x9a
  82
  83 #ifdef CONFIG_MISC_INIT_R
  84 int misc_init_r(void)
  85 {
  86 #ifdef CONFIG_I2C_EEPROM
  87         at91_set_ethaddr(AT24MAC_MAC_OFFSET);
  88 #endif
  89
  90         return 0;
  91 }
  92 #endif
  93
  94 /* SPL */
  95 #ifdef CONFIG_SPL_BUILD
  96 void spl_board_init(void)
  97 {
  98 }
  99
 100 static void ddrc_conf(struct atmel_mpddrc_config *ddrc)
 101 {
 102         ddrc->md = (ATMEL_MPDDRC_MD_DBW_32_BITS | ATMEL_MPDDRC_MD_DDR3_SDRAM);
 103
 104         ddrc->cr = (ATMEL_MPDDRC_CR_NC_COL_10 |
 105                     ATMEL_MPDDRC_CR_NR_ROW_14 |
 106                     ATMEL_MPDDRC_CR_CAS_DDR_CAS5 |
 107                     ATMEL_MPDDRC_CR_DIC_DS |
 108                     ATMEL_MPDDRC_CR_DIS_DLL |
 109                     ATMEL_MPDDRC_CR_NB_8BANKS |
 110                     ATMEL_MPDDRC_CR_DECOD_INTERLEAVED |
 111                     ATMEL_MPDDRC_CR_UNAL_SUPPORTED);
 112
 113         ddrc->rtr = 0x511;
 114
 115         ddrc->tpr0 = (6 << ATMEL_MPDDRC_TPR0_TRAS_OFFSET |
 116                       3 << ATMEL_MPDDRC_TPR0_TRCD_OFFSET |
 117                       4 << ATMEL_MPDDRC_TPR0_TWR_OFFSET |
 118                       9 << ATMEL_MPDDRC_TPR0_TRC_OFFSET |
 119                       3 << ATMEL_MPDDRC_TPR0_TRP_OFFSET |
 120                       4 << ATMEL_MPDDRC_TPR0_TRRD_OFFSET |
 121                       4 << ATMEL_MPDDRC_TPR0_TWTR_OFFSET |
 122                       4 << ATMEL_MPDDRC_TPR0_TMRD_OFFSET);
 123
 124         ddrc->tpr1 = (27 << ATMEL_MPDDRC_TPR1_TRFC_OFFSET |
 125                       29 << ATMEL_MPDDRC_TPR1_TXSNR_OFFSET |
 126                       0 << ATMEL_MPDDRC_TPR1_TXSRD_OFFSET |
 127                       3 << ATMEL_MPDDRC_TPR1_TXP_OFFSET);
 128
 129         ddrc->tpr2 = (0 << ATMEL_MPDDRC_TPR2_TXARD_OFFSET |
 130                       0 << ATMEL_MPDDRC_TPR2_TXARDS_OFFSET |
 131                       0 << ATMEL_MPDDRC_TPR2_TRPA_OFFSET |
 132                       4 << ATMEL_MPDDRC_TPR2_TRTP_OFFSET |
 133                       7 << ATMEL_MPDDRC_TPR2_TFAW_OFFSET);
 134 }
 135
 136 void mem_init(void)
 137 {
 138         struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
 139         struct atmel_mpddr *mpddrc = (struct atmel_mpddr *)ATMEL_BASE_MPDDRC;
 140         struct atmel_mpddrc_config ddrc_config;
 141         u32 reg;
 142
 143         ddrc_conf(&ddrc_config);
 144
 145         at91_periph_clk_enable(ATMEL_ID_MPDDRC);
 146         writel(AT91_PMC_DDR, &pmc->scer);
 147
 148         reg = readl(&mpddrc->io_calibr);
 149         reg &= ~ATMEL_MPDDRC_IO_CALIBR_RDIV;
 150         reg |= ATMEL_MPDDRC_IO_CALIBR_DDR3_RZQ_55;
 151         reg &= ~ATMEL_MPDDRC_IO_CALIBR_TZQIO;
 152         reg |= ATMEL_MPDDRC_IO_CALIBR_TZQIO_(100);
 153         writel(reg, &mpddrc->io_calibr);
 154
 155         writel(ATMEL_MPDDRC_RD_DATA_PATH_SHIFT_TWO_CYCLE,
 156                &mpddrc->rd_data_path);
 157
 158         ddr3_init(ATMEL_BASE_MPDDRC, ATMEL_BASE_DDRCS, &ddrc_config);
 159
 160         writel(0x3, &mpddrc->cal_mr4);
 161         writel(64, &mpddrc->tim_cal);
 162 }
 163
 164 void at91_pmc_init(void)
 165 {
 166         struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
 167         u32 tmp;
 168
 169         /*
 170          * while coming from the ROM code, we run on PLLA @ 492 MHz / 164 MHz
 171          * so we need to slow down and configure MCKR accordingly.
 172          * This is why we have a special flavor of the switching function.
 173          */
 174         tmp = AT91_PMC_MCKR_PLLADIV_2 |
 175               AT91_PMC_MCKR_MDIV_3 |
 176               AT91_PMC_MCKR_CSS_MAIN;
 177         at91_mck_init_down(tmp);
 178
 179         tmp = AT91_PMC_PLLAR_29 |
 180               AT91_PMC_PLLXR_PLLCOUNT(0x3f) |
 181               AT91_PMC_PLLXR_MUL(82) |
 182               AT91_PMC_PLLXR_DIV(1);
 183         at91_plla_init(tmp);
 184
 185         writel(0x0 << 8, &pmc->pllicpr);
 186
 187         tmp = AT91_PMC_MCKR_H32MXDIV |
 188               AT91_PMC_MCKR_PLLADIV_2 |
 189               AT91_PMC_MCKR_MDIV_3 |
 190               AT91_PMC_MCKR_CSS_PLLA;
 191         at91_mck_init(tmp);
 192 }
 193 #endif