1 /*
2 * WORK Microwave work_92105 board support
3 *
4 * (C) Copyright 2014 DENX Software Engineering GmbH
5 * Written-by: Albert ARIBAUD <albert.aribaud@3adev.fr>
6 *
7 * SPDX-License-Identifier: GPL-2.0+
8 */
9
10 #include <common.h>
11 #include <asm/io.h>
12 #include <asm/arch/sys_proto.h>
13 #include <asm/arch/cpu.h>
14 #include <asm/arch/emc.h>
15 #include <asm/gpio.h>
16 #include <spl.h>
17 #include "work_92105_display.h"
18
19 struct emc_dram_settings dram_64mb = {
20 .cmddelay = 0x0001C000,
21 .config0 = 0x00005682,
22 .rascas0 = 0x00000302,
23 .rdconfig = 0x00000011,
24 .trp = 52631578,
25 .tras = 20833333,
26 .tsrex = 12500000,
27 .twr = 66666666,
28 .trc = 13888888,
29 .trfc = 10256410,
30 .txsr = 12500000,
31 .trrd = 1,
32 .tmrd = 1,
33 .tcdlr = 0,
34 .refresh = 128000,
35 .mode = 0x00018000,
36 .emode = 0x02000000
37 };
38
39 const struct emc_dram_settings dram_128mb = {
40 .cmddelay = 0x0001C000,
41 .config0 = 0x00005882,
42 .rascas0 = 0x00000302,
43 .rdconfig = 0x00000011,
44 .trp = 52631578,
45 .tras = 22222222,
46 .tsrex = 8333333,
47 .twr = 66666666,
48 .trc = 14814814,
49 .trfc = 10256410,
50 .txsr = 8333333,
51 .trrd = 1,
52 .tmrd = 1,
53 .tcdlr = 0,
54 .refresh = 128000,
55 .mode = 0x00030000,
56 .emode = 0x02000000
57 };
58
spl_board_init(void)59 void spl_board_init(void)
60 {
61 /* initialize serial port for console */
62 lpc32xx_uart_init(CONFIG_SYS_LPC32XX_UART);
63 /* initialize console */
64 preloader_console_init();
65 /* init DDR and NAND to chainload U-Boot */
66 ddr_init(&dram_128mb);
67 /*
68 * If this is actually a 64MB module, then the highest column
69 * bit in any address will be ignored, and thus address 0x80000000
70 * should be mirrored at address 0x80000800. Test this.
71 */
72 writel(0x31415926, 0x80000000); /* write Pi at 0x80000000 */
73 writel(0x16180339, 0x80000800); /* write Phi at 0x80000800 */
74 if (readl(0x80000000) == 0x16180339) /* check 0x80000000 */ {
75 /* actually 64MB mirrored: reconfigure controller */
76 ddr_init(&dram_64mb);
77 }
78 /* initialize NAND controller to load U-Boot from NAND */
79 lpc32xx_mlc_nand_init();
80 }
81
spl_boot_device(void)82 u32 spl_boot_device(void)
83 {
84 return BOOT_DEVICE_NAND;
85 }
86