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board_f: Rename initdram() to dram_init()
[u-boot] / board / freescale / m5253demo / m5253demo.c
1 /*
2  * (C) Copyright 2000-2003
3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
4  *
5  * Copyright (C) 2004-2007, 2012 Freescale Semiconductor, Inc.
6  * Hayden Fraser (Hayden.Fraser@freescale.com)
7  *
8  * SPDX-License-Identifier:     GPL-2.0+
9  */
10
11 #include <common.h>
12 #include <asm/immap.h>
13 #include <netdev.h>
14 #include <asm/io.h>
15
16 DECLARE_GLOBAL_DATA_PTR;
17
18 int checkboard(void)
19 {
20         puts("Board: ");
21         puts("Freescale MCF5253 DEMO\n");
22         return 0;
23 };
24
25 int dram_init(void)
26 {
27         u32 dramsize = 0;
28
29         /*
30          * Check to see if the SDRAM has already been initialized
31          * by a run control tool
32          */
33         if (!(mbar_readLong(MCFSIM_DCR) & 0x8000)) {
34                 u32 RC, temp;
35
36                 RC = (CONFIG_SYS_CLK / 1000000) >> 1;
37                 RC = (RC * 15) >> 4;
38
39                 /* Initialize DRAM Control Register: DCR */
40                 mbar_writeShort(MCFSIM_DCR, (0x8400 | RC));
41                 __asm__("nop");
42
43                 mbar_writeLong(MCFSIM_DACR0, 0x00003224);
44                 __asm__("nop");
45
46                 /* Initialize DMR0 */
47                 dramsize = (CONFIG_SYS_SDRAM_SIZE << 20);
48                 temp = (dramsize - 1) & 0xFFFC0000;
49                 mbar_writeLong(MCFSIM_DMR0, temp | 1);
50                 __asm__("nop");
51
52                 mbar_writeLong(MCFSIM_DACR0, 0x0000322c);
53                 mb();
54                 __asm__("nop");
55
56                 /* Write to this block to initiate precharge */
57                 *(u32 *) (CONFIG_SYS_SDRAM_BASE) = 0xa5a5a5a5;
58                 mb();
59                 __asm__("nop");
60
61                 /* Set RE bit in DACR */
62                 mbar_writeLong(MCFSIM_DACR0,
63                                mbar_readLong(MCFSIM_DACR0) | 0x8000);
64                 __asm__("nop");
65
66                 /* Wait for at least 8 auto refresh cycles to occur */
67                 udelay(500);
68
69                 /* Finish the configuration by issuing the MRS */
70                 mbar_writeLong(MCFSIM_DACR0,
71                                mbar_readLong(MCFSIM_DACR0) | 0x0040);
72                 __asm__("nop");
73
74                 *(u32 *) (CONFIG_SYS_SDRAM_BASE + 0x800) = 0xa5a5a5a5;
75                 mb();
76         }
77
78         gd->ram_size = dramsize;
79
80         return 0;
81 }
82
83 int testdram(void)
84 {
85         /* TODO: XXX XXX XXX */
86         printf("DRAM test not implemented!\n");
87
88         return (0);
89 }
90
91 #ifdef CONFIG_CMD_IDE
92 #include <ata.h>
93 int ide_preinit(void)
94 {
95         return (0);
96 }
97
98 void ide_set_reset(int idereset)
99 {
100         atac_t *ata = (atac_t *) CONFIG_SYS_ATA_BASE_ADDR;
101         long period;
102         /*  t1,  t2,  t3,  t4,  t5,  t6,  t9, tRD,  tA */
103         int piotms[5][9] = { {70, 165, 60, 30, 50, 5, 20, 0, 35},       /* PIO 0 */
104         {50, 125, 45, 20, 35, 5, 15, 0, 35},    /* PIO 1 */
105         {30, 100, 30, 15, 20, 5, 10, 0, 35},    /* PIO 2 */
106         {30, 80, 30, 10, 20, 5, 10, 0, 35},     /* PIO 3 */
107         {25, 70, 20, 10, 20, 5, 10, 0, 35}      /* PIO 4 */
108         };
109
110         if (idereset) {
111                 /* control reset */
112                 out_8(&ata->cr, 0);
113                 udelay(100);
114         } else {
115                 mbar2_writeLong(CIM_MISCCR, CIM_MISCCR_CPUEND);
116
117 #define CALC_TIMING(t) (t + period - 1) / period
118                 period = 1000000000 / (CONFIG_SYS_CLK / 2);     /* period in ns */
119
120                 /*ata->ton = CALC_TIMING (180); */
121                 out_8(&ata->t1, CALC_TIMING(piotms[2][0]));
122                 out_8(&ata->t2w, CALC_TIMING(piotms[2][1]));
123                 out_8(&ata->t2r, CALC_TIMING(piotms[2][1]));
124                 out_8(&ata->ta, CALC_TIMING(piotms[2][8]));
125                 out_8(&ata->trd, CALC_TIMING(piotms[2][7]));
126                 out_8(&ata->t4, CALC_TIMING(piotms[2][3]));
127                 out_8(&ata->t9, CALC_TIMING(piotms[2][6]));
128
129                 /* IORDY enable */
130                 out_8(&ata->cr, 0x40);
131                 udelay(2000);
132                 /* IORDY enable */
133                 setbits_8(&ata->cr, 0x01);
134         }
135 }
136 #endif                          /* CONFIG_CMD_IDE */
137
138
139 #ifdef CONFIG_DRIVER_DM9000
140 int board_eth_init(bd_t *bis)
141 {
142         return dm9000_initialize(bis);
143 }
144 #endif