2 * Copyright (C) 2007 Freescale Semiconductor, Inc.
3 * Copyright (C) 2010 Ilya Yanok, Emcraft Systems, yanok@emcraft.com
5 * Authors: Nick.Spence@freescale.com
6 * Wilson.Lo@freescale.com
7 * scottwood@freescale.com
9 * This files is mostly identical to the original from
10 * board\freescale\mpc8315erdb\sdram.c
12 * See file CREDITS for list of people who contributed to this
15 * This program is free software; you can redistribute it and/or
16 * modify it under the terms of the GNU General Public License as
17 * published by the Free Software Foundation; either version 2 of
18 * the License, or (at your option) any later version.
20 * This program is distributed in the hope that it will be useful,
21 * but WITHOUT ANY WARRANTY; without even the implied warranty of
22 * MERCHANTABILITY or FITNESS for A PARTICULAR PURPOSE. See the
23 * GNU General Public License for more details.
25 * You should have received a copy of the GNU General Public License
26 * along with this program; if not, write to the Free Software
27 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
34 #include <asm/bitops.h>
37 #include <asm/processor.h>
39 DECLARE_GLOBAL_DATA_PTR;
41 static void resume_from_sleep(void)
43 u32 magic = *(u32 *)0;
45 typedef void (*func_t)(void);
46 func_t resume = *(func_t *)4;
48 if (magic == 0xf5153ae5)
51 gd->flags &= ~GD_FLG_SILENT;
52 puts("\nResume from sleep failed: bad magic word\n");
55 /* Fixed sdram init -- doesn't use serial presence detect.
57 * This is useful for faster booting in configs where the RAM is unlikely
58 * to be changed, or for things like NAND booting where space is tight.
60 static long fixed_sdram(void)
62 immap_t *im = (immap_t *)CONFIG_SYS_IMMR;
63 u32 msize = CONFIG_SYS_DDR_SIZE * 1024 * 1024;
64 u32 msize_log2 = __ilog2(msize);
66 out_be32(&im->sysconf.ddrlaw[0].bar,
67 CONFIG_SYS_DDR_SDRAM_BASE & 0xfffff000);
68 out_be32(&im->sysconf.ddrlaw[0].ar, LBLAWAR_EN | (msize_log2 - 1));
69 out_be32(&im->sysconf.ddrcdr, CONFIG_SYS_DDRCDR_VALUE);
72 * Erratum DDR3 requires a 50ms delay after clearing DDRCDR[DDR_cfg],
73 * or the DDR2 controller may fail to initialize correctly.
77 out_be32(&im->ddr.csbnds[0].csbnds, (msize - 1) >> 24);
78 out_be32(&im->ddr.cs_config[0], CONFIG_SYS_DDR_CS0_CONFIG);
80 /* Currently we use only one CS, so disable the other bank. */
81 out_be32(&im->ddr.cs_config[1], 0);
83 out_be32(&im->ddr.sdram_clk_cntl, CONFIG_SYS_DDR_SDRAM_CLK_CNTL);
84 out_be32(&im->ddr.timing_cfg_3, CONFIG_SYS_DDR_TIMING_3);
85 out_be32(&im->ddr.timing_cfg_1, CONFIG_SYS_DDR_TIMING_1);
86 out_be32(&im->ddr.timing_cfg_2, CONFIG_SYS_DDR_TIMING_2);
87 out_be32(&im->ddr.timing_cfg_0, CONFIG_SYS_DDR_TIMING_0);
89 if (in_be32(&im->pmc.pmccr1) & PMCCR1_POWER_OFF) {
90 out_be32(&im->ddr.sdram_cfg,
91 CONFIG_SYS_DDR_SDRAM_CFG | SDRAM_CFG_BI);
93 out_be32(&im->ddr.sdram_cfg, CONFIG_SYS_DDR_SDRAM_CFG);
96 out_be32(&im->ddr.sdram_cfg2, CONFIG_SYS_DDR_SDRAM_CFG2);
97 out_be32(&im->ddr.sdram_mode, CONFIG_SYS_DDR_MODE);
98 out_be32(&im->ddr.sdram_mode2, CONFIG_SYS_DDR_MODE2);
100 out_be32(&im->ddr.sdram_interval, CONFIG_SYS_DDR_INTERVAL);
103 /* enable DDR controller */
104 setbits_be32(&im->ddr.sdram_cfg, SDRAM_CFG_MEM_EN);
107 return get_ram_size(CONFIG_SYS_DDR_SDRAM_BASE, msize);
110 phys_size_t initdram(int board_type)
112 immap_t *im = (immap_t *)CONFIG_SYS_IMMR;
115 if ((in_be32(&im->sysconf.immrbar) & IMMRBAR_BASE_ADDR) != (u32)im)
119 msize = fixed_sdram();
121 if (in_be32(&im->pmc.pmccr1) & PMCCR1_POWER_OFF)
124 /* return total bus SDRAM size(bytes) -- DDR */