2 * Copyright (C) Freescale Semiconductor, Inc. 2006-2007
4 * Authors: Nick.Spence@freescale.com
5 * Wilson.Lo@freescale.com
6 * scottwood@freescale.com
8 * See file CREDITS for list of people who contributed to this
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License as
13 * published by the Free Software Foundation; either version 2 of
14 * the License, or (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS for A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
29 #include <spd_sdram.h>
31 #include <asm/bitops.h>
34 #include <asm/processor.h>
36 DECLARE_GLOBAL_DATA_PTR
;
38 #ifndef CFG_8313ERDB_BROKEN_PMC
39 static void resume_from_sleep(void)
41 u32 magic
= *(u32
*)0;
43 typedef void (*func_t
)(void);
44 func_t resume
= *(func_t
*)4;
46 if (magic
== 0xf5153ae5)
49 gd
->flags
&= ~GD_FLG_SILENT
;
50 puts("\nResume from sleep failed: bad magic word\n");
54 /* Fixed sdram init -- doesn't use serial presence detect.
56 * This is useful for faster booting in configs where the RAM is unlikely
57 * to be changed, or for things like NAND booting where space is tight.
59 static long fixed_sdram(void)
61 volatile immap_t
*im
= (volatile immap_t
*)CFG_IMMR
;
62 u32 msize
= CFG_DDR_SIZE
* 1024 * 1024;
63 u32 msize_log2
= __ilog2(msize
);
65 im
->sysconf
.ddrlaw
[0].bar
= CFG_DDR_SDRAM_BASE
>> 12;
66 im
->sysconf
.ddrlaw
[0].ar
= LBLAWAR_EN
| (msize_log2
- 1);
67 im
->sysconf
.ddrcdr
= CFG_DDRCDR_VALUE
;
70 * Erratum DDR3 requires a 50ms delay after clearing DDRCDR[DDR_cfg],
71 * or the DDR2 controller may fail to initialize correctly.
75 im
->ddr
.csbnds
[0].csbnds
= (msize
- 1) >> 24;
76 im
->ddr
.cs_config
[0] = CFG_DDR_CONFIG
;
78 /* Currently we use only one CS, so disable the other bank. */
79 im
->ddr
.cs_config
[1] = 0;
81 im
->ddr
.sdram_clk_cntl
= CFG_DDR_CLK_CNTL
;
82 im
->ddr
.timing_cfg_3
= CFG_DDR_TIMING_3
;
83 im
->ddr
.timing_cfg_1
= CFG_DDR_TIMING_1
;
84 im
->ddr
.timing_cfg_2
= CFG_DDR_TIMING_2
;
85 im
->ddr
.timing_cfg_0
= CFG_DDR_TIMING_0
;
87 #ifndef CFG_8313ERDB_BROKEN_PMC
88 if (im
->pmc
.pmccr1
& PMCCR1_POWER_OFF
)
89 im
->ddr
.sdram_cfg
= CFG_SDRAM_CFG
| SDRAM_CFG_BI
;
92 im
->ddr
.sdram_cfg
= CFG_SDRAM_CFG
;
94 im
->ddr
.sdram_cfg2
= CFG_SDRAM_CFG2
;
95 im
->ddr
.sdram_mode
= CFG_DDR_MODE
;
96 im
->ddr
.sdram_mode2
= CFG_DDR_MODE_2
;
98 im
->ddr
.sdram_interval
= CFG_DDR_INTERVAL
;
101 /* enable DDR controller */
102 im
->ddr
.sdram_cfg
|= SDRAM_CFG_MEM_EN
;
107 long int initdram(int board_type
)
109 volatile immap_t
*im
= (volatile immap_t
*)CFG_IMMR
;
110 volatile lbus83xx_t
*lbc
= &im
->lbus
;
113 if ((im
->sysconf
.immrbar
& IMMRBAR_BASE_ADDR
) != (u32
)im
)
116 /* DDR SDRAM - Main SODIMM */
117 msize
= fixed_sdram();
119 /* Local Bus setup lbcr and mrtpr */
120 lbc
->lbcr
= CFG_LBC_LBCR
;
121 lbc
->mrtpr
= CFG_LBC_MRTPR
;
124 #ifndef CFG_8313ERDB_BROKEN_PMC
125 if (im
->pmc
.pmccr1
& PMCCR1_POWER_OFF
)
129 /* return total bus SDRAM size(bytes) -- DDR */