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
12 #include <asm/global_data.h>
13 #include <asm/immap.h>
16 #include <dm/platform_data/serial_coldfire.h>
18 DECLARE_GLOBAL_DATA_PTR;
22 /* setup for possible K0108 lcd connected on the parallel port */
23 sim_t *sim = (sim_t *)(MMAP_SIM);
25 out_be16(&sim->par, 0x300);
27 gpio_t *gpio = (gpio_t *)(MMAP_GPIO);
29 out_be16(&gpio->paddr, 0xfcff);
30 out_be16(&gpio->padat, 0x0c00);
36 puts("AMCORE v.001(alpha)\n");
44 * in dram_init we are here executing from flash
46 * is with no ACR/flash cache enabled
47 * nop = 40ns (scope measured)
49 void fudelay(int usec)
59 sdramctrl_t *dc = (sdramctrl_t *)(MMAP_DRAMC);
62 * SDRAM MT48LC4M32B2 details
63 * Memory block 0: 16 MB of SDRAM at address $00000000
64 * Port size: 32-bit port
66 * Memory block 0 wired as follows:
67 * CPU : A15 A14 A13 A12 A11 A10 A9 A17 A18 A19 A20 A21 A22 A23
68 * SDRAM : A0 A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 A11 BA0 BA1
70 * Ensure that there is a delay of at least 100 microseconds from
71 * processor reset to the following code so that the SDRAM is ready
78 * set proper RC as per specification
80 RC = (CFG_SYS_CPU_CLK / 1000000) >> 1;
83 /* 0x8000 is the faster option */
84 out_be16(&dc->dcr, 0x8200 | RC);
87 * DACR0, page mode continuous, CMD on A20 0x0300
89 out_be32(&dc->dacr0, 0x00003304);
91 dramsize = ((CFG_SYS_SDRAM_SIZE)-1) & 0xfffc0000;
92 out_be32(&dc->dmr0, dramsize|1);
94 /* issue a PRECHARGE ALL */
95 out_be32(&dc->dacr0, 0x0000330c);
96 out_be32((u32 *)0x00000004, 0xbeaddeed);
97 /* issue AUTOREFRESH */
98 out_be32(&dc->dacr0, 0x0000b304);
99 /* let refresh occur */
102 out_be32(&dc->dacr0, 0x0000b344);
103 out_be32((u32 *)0x00000c00, 0xbeaddeed);
105 gd->ram_size = get_ram_size(CFG_SYS_SDRAM_BASE,
111 static struct coldfire_serial_plat mcf5307_serial_plat = {
112 .base = CONFIG_SYS_UART_BASE,
114 .baudrate = CONFIG_BAUDRATE,
117 U_BOOT_DRVINFO(coldfire_serial) = {
118 .name = "serial_coldfire",
119 .plat = &mcf5307_serial_plat,