1 /* 2 * Board functions for Sysam AMCORE (MCF5307 based) board 3 * 4 * (C) Copyright 2016 Angelo Dureghello <angelo@sysam.it> 5 * 6 * SPDX-License-Identifier: GPL-2.0+ 7 * 8 * This file copies memory testdram() from sandburst/common/sb_common.c 9 */ 10 11 #include <common.h> 12 #include <asm/immap.h> 13 #include <asm/io.h> 14 #include <dm.h> 15 #include <dm/platform_data/serial_coldfire.h> 16 17 void init_lcd(void) 18 { 19 /* setup for possible K0108 lcd connected on the parallel port */ 20 sim_t *sim = (sim_t *)(MMAP_SIM); 21 22 out_be16(&sim->par, 0x300); 23 24 gpio_t *gpio = (gpio_t *)(MMAP_GPIO); 25 26 out_be16(&gpio->paddr, 0xfcff); 27 out_be16(&gpio->padat, 0x0c00); 28 } 29 30 int checkboard(void) 31 { 32 puts("Board: "); 33 puts("AMCORE v.001(alpha)\n"); 34 35 init_lcd(); 36 37 return 0; 38 } 39 40 /* 41 * in initdram we are here executing from flash 42 * case 1: 43 * is with no ACR/flash cache enabled 44 * nop = 40ns (scope measured) 45 */ 46 void fudelay(int usec) 47 { 48 while (usec--) 49 asm volatile ("nop"); 50 } 51 52 phys_size_t initdram(int board_type) 53 { 54 u32 dramsize, RC; 55 56 sdramctrl_t *dc = (sdramctrl_t *)(MMAP_DRAMC); 57 58 /* 59 * SDRAM MT48LC4M32B2 details 60 * Memory block 0: 16 MB of SDRAM at address $00000000 61 * Port size: 32-bit port 62 * 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 66 * 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 69 * for commands. 70 */ 71 fudelay(100); 72 73 /* 74 * DCR 75 * set proper RC as per specification 76 */ 77 RC = (CONFIG_SYS_CPU_CLK / 1000000) >> 1; 78 RC = (RC * 15) >> 4; 79 80 /* 0x8000 is the faster option */ 81 out_be16(&dc->dcr, 0x8200 | RC); 82 83 /* 84 * DACR0, page mode continuous, CMD on A20 0x0300 85 */ 86 out_be32(&dc->dacr0, 0x00003304); 87 88 dramsize = ((CONFIG_SYS_SDRAM_SIZE)-1) & 0xfffc0000; 89 out_be32(&dc->dmr0, dramsize|1); 90 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 */ 97 fudelay(1); 98 99 out_be32(&dc->dacr0, 0x0000b344); 100 out_be32((u32 *)0x00000c00, 0xbeaddeed); 101 102 return get_ram_size(CONFIG_SYS_SDRAM_BASE, CONFIG_SYS_SDRAM_SIZE); 103 } 104 105 static struct coldfire_serial_platdata mcf5307_serial_plat = { 106 .base = CONFIG_SYS_UART_BASE, 107 .port = 0, 108 .baudrate = CONFIG_BAUDRATE, 109 }; 110 111 U_BOOT_DEVICE(coldfire_serial) = { 112 .name = "serial_coldfire", 113 .platdata = &mcf5307_serial_plat, 114 }; 115