1 // SPDX-License-Identifier: GPL-2.0+
3 * Board functions for Sysam AMCORE (MCF5307 based) board
5 * (C) Copyright 2016 Angelo Dureghello <angelo@sysam.it>
7 * This file copies memory testdram() from sandburst/common/sb_common.c
11 #include <asm/immap.h>
14 #include <dm/platform_data/serial_coldfire.h>
16 DECLARE_GLOBAL_DATA_PTR;
20 /* setup for possible K0108 lcd connected on the parallel port */
21 sim_t *sim = (sim_t *)(MMAP_SIM);
23 out_be16(&sim->par, 0x300);
25 gpio_t *gpio = (gpio_t *)(MMAP_GPIO);
27 out_be16(&gpio->paddr, 0xfcff);
28 out_be16(&gpio->padat, 0x0c00);
34 puts("AMCORE v.001(alpha)\n");
42 * in dram_init we are here executing from flash
44 * is with no ACR/flash cache enabled
45 * nop = 40ns (scope measured)
47 void fudelay(int usec)
57 sdramctrl_t *dc = (sdramctrl_t *)(MMAP_DRAMC);
60 * SDRAM MT48LC4M32B2 details
61 * Memory block 0: 16 MB of SDRAM at address $00000000
62 * Port size: 32-bit port
64 * Memory block 0 wired as follows:
65 * CPU : A15 A14 A13 A12 A11 A10 A9 A17 A18 A19 A20 A21 A22 A23
66 * SDRAM : A0 A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 A11 BA0 BA1
68 * Ensure that there is a delay of at least 100 microseconds from
69 * processor reset to the following code so that the SDRAM is ready
76 * set proper RC as per specification
78 RC = (CONFIG_SYS_CPU_CLK / 1000000) >> 1;
81 /* 0x8000 is the faster option */
82 out_be16(&dc->dcr, 0x8200 | RC);
85 * DACR0, page mode continuous, CMD on A20 0x0300
87 out_be32(&dc->dacr0, 0x00003304);
89 dramsize = ((CONFIG_SYS_SDRAM_SIZE)-1) & 0xfffc0000;
90 out_be32(&dc->dmr0, dramsize|1);
92 /* issue a PRECHARGE ALL */
93 out_be32(&dc->dacr0, 0x0000330c);
94 out_be32((u32 *)0x00000004, 0xbeaddeed);
95 /* issue AUTOREFRESH */
96 out_be32(&dc->dacr0, 0x0000b304);
97 /* let refresh occur */
100 out_be32(&dc->dacr0, 0x0000b344);
101 out_be32((u32 *)0x00000c00, 0xbeaddeed);
103 gd->ram_size = get_ram_size(CONFIG_SYS_SDRAM_BASE,
104 CONFIG_SYS_SDRAM_SIZE);
109 static struct coldfire_serial_platdata mcf5307_serial_plat = {
110 .base = CONFIG_SYS_UART_BASE,
112 .baudrate = CONFIG_BAUDRATE,
115 U_BOOT_DEVICE(coldfire_serial) = {
116 .name = "serial_coldfire",
117 .platdata = &mcf5307_serial_plat,