summaryrefslogtreecommitdiff
path: root/arch/powerpc/cpu/mpc85xx/ddr-gen1.c
blob: 54437dd0cbd3e5b7ff5978738ba239fb1b6c2979 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
/*
 * Copyright 2008 Freescale Semiconductor, Inc.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * Version 2 as published by the Free Software Foundation.
 */

#include <common.h>
#include <asm/io.h>
#include <asm/fsl_ddr_sdram.h>

#if (CONFIG_CHIP_SELECTS_PER_CTRL > 4)
#error Invalid setting for CONFIG_CHIP_SELECTS_PER_CTRL
#endif

void fsl_ddr_set_memctl_regs(const fsl_ddr_cfg_regs_t *regs,
			     unsigned int ctrl_num)
{
	unsigned int i;
	volatile ccsr_ddr_t *ddr = (void *)CONFIG_SYS_MPC85xx_DDR_ADDR;

	if (ctrl_num != 0) {
		printf("%s unexpected ctrl_num = %u\n", __FUNCTION__, ctrl_num);
		return;
	}

	for (i = 0; i < CONFIG_CHIP_SELECTS_PER_CTRL; i++) {
		if (i == 0) {
			out_be32(&ddr->cs0_bnds, regs->cs[i].bnds);
			out_be32(&ddr->cs0_config, regs->cs[i].config);

		} else if (i == 1) {
			out_be32(&ddr->cs1_bnds, regs->cs[i].bnds);
			out_be32(&ddr->cs1_config, regs->cs[i].config);

		} else if (i == 2) {
			out_be32(&ddr->cs2_bnds, regs->cs[i].bnds);
			out_be32(&ddr->cs2_config, regs->cs[i].config);

		} else if (i == 3) {
			out_be32(&ddr->cs3_bnds, regs->cs[i].bnds);
			out_be32(&ddr->cs3_config, regs->cs[i].config);
		}
	}

	out_be32(&ddr->timing_cfg_1, regs->timing_cfg_1);
	out_be32(&ddr->timing_cfg_2, regs->timing_cfg_2);
	out_be32(&ddr->sdram_mode, regs->ddr_sdram_mode);
	out_be32(&ddr->sdram_interval, regs->ddr_sdram_interval);
#if defined(CONFIG_MPC8555) || defined(CONFIG_MPC8541)
	out_be32(&ddr->sdram_clk_cntl, regs->ddr_sdram_clk_cntl);
#endif

	/*
	 * 200 painful micro-seconds must elapse between
	 * the DDR clock setup and the DDR config enable.
	 */
	udelay(200);
	asm volatile("sync;isync");

	out_be32(&ddr->sdram_cfg, regs->ddr_sdram_cfg);

	asm("sync;isync;msync");
	udelay(500);
}

#if defined(CONFIG_DDR_ECC) && !defined(CONFIG_ECC_INIT_VIA_DDRCONTROLLER)
/*
 * Initialize all of memory for ECC, then enable errors.
 */

void
ddr_enable_ecc(unsigned int dram_size)
{
	volatile ccsr_ddr_t *ddr= (void *)(CONFIG_SYS_MPC85xx_DDR_ADDR);

	dma_meminit(CONFIG_MEM_INIT_VALUE, dram_size);

	/*
	 * Enable errors for ECC.
	 */
	debug("DMA DDR: err_disable = 0x%08x\n", ddr->err_disable);
	ddr->err_disable = 0x00000000;
	asm("sync;isync;msync");
	debug("DMA DDR: err_disable = 0x%08x\n", ddr->err_disable);
}

#endif	/* CONFIG_DDR_ECC  && ! CONFIG_ECC_INIT_VIA_DDRCONTROLLER */