2 * Board functions for Sysam AMCORE (MCF5307 based) board
4 * (C) Copyright 2016 Angelo Dureghello <angelo@sysam.it>
6 * SPDX-License-Identifier: GPL-2.0+
8 * This file copies memory testdram() from sandburst/common/sb_common.c
12 #include <asm/immap.h>
15 #include <dm/platform_data/serial_coldfire.h>
19 /* setup for possible K0108 lcd connected on the parallel port */
20 sim_t
*sim
= (sim_t
*)(MMAP_SIM
);
22 out_be16(&sim
->par
, 0x300);
24 gpio_t
*gpio
= (gpio_t
*)(MMAP_GPIO
);
26 out_be16(&gpio
->paddr
, 0xfcff);
27 out_be16(&gpio
->padat
, 0x0c00);
33 puts("AMCORE v.001(alpha)\n");
41 * in initdram we are here executing from flash
43 * is with no ACR/flash cache enabled
44 * nop = 40ns (scope measured)
46 void fudelay(int usec
)
52 phys_size_t
initdram(int board_type
)
56 sdramctrl_t
*dc
= (sdramctrl_t
*)(MMAP_DRAMC
);
59 * SDRAM MT48LC4M32B2 details
60 * Memory block 0: 16 MB of SDRAM at address $00000000
61 * Port size: 32-bit port
63 * Memory block 0 wired as follows:
64 * CPU : A15 A14 A13 A12 A11 A10 A9 A17 A18 A19 A20 A21 A22 A23
65 * SDRAM : A0 A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 A11 BA0 BA1
67 * Ensure that there is a delay of at least 100 microseconds from
68 * processor reset to the following code so that the SDRAM is ready
75 * set proper RC as per specification
77 RC
= (CONFIG_SYS_CPU_CLK
/ 1000000) >> 1;
80 /* 0x8000 is the faster option */
81 out_be16(&dc
->dcr
, 0x8200 | RC
);
84 * DACR0, page mode continuous, CMD on A20 0x0300
86 out_be32(&dc
->dacr0
, 0x00003304);
88 dramsize
= ((CONFIG_SYS_SDRAM_SIZE
)-1) & 0xfffc0000;
89 out_be32(&dc
->dmr0
, dramsize
|1);
91 /* issue a PRECHARGE ALL */
92 out_be32(&dc
->dacr0
, 0x0000330c);
93 out_be32((u32
*)0x00000004, 0xbeaddeed);
94 /* issue AUTOREFRESH */
95 out_be32(&dc
->dacr0
, 0x0000b304);
96 /* let refresh occur */
99 out_be32(&dc
->dacr0
, 0x0000b344);
100 out_be32((u32
*)0x00000c00, 0xbeaddeed);
102 return get_ram_size(CONFIG_SYS_SDRAM_BASE
, CONFIG_SYS_SDRAM_SIZE
);
105 static struct coldfire_serial_platdata mcf5307_serial_plat
= {
106 .base
= CONFIG_SYS_UART_BASE
,
108 .baudrate
= CONFIG_BAUDRATE
,
111 U_BOOT_DEVICE(coldfire_serial
) = {
112 .name
= "serial_coldfire",
113 .platdata
= &mcf5307_serial_plat
,