1/*  *********************************************************************
2    *  Broadcom Common Firmware Environment (CFE)
3    *
4    *  JEDEC DRAM constants			File: jedec.h
5    *
6    *  Constants and macros mostly related to JEDEC serial-presence
7    *  detect ROMs on DIMMs
8    *
9    *  Author:  Mitch Lichtenberg
10    *
11    *********************************************************************
12    *
13    *  Copyright 2000,2001,2002,2003
14    *  Broadcom Corporation. All rights reserved.
15    *
16    *  This software is furnished under license and may be used and
17    *  copied only in accordance with the following terms and
18    *  conditions.  Subject to these conditions, you may download,
19    *  copy, install, use, modify and distribute modified or unmodified
20    *  copies of this software in source and/or binary form.  No title
21    *  or ownership is transferred hereby.
22    *
23    *  1) Any source code used, modified or distributed must reproduce
24    *     and retain this copyright notice and list of conditions
25    *     as they appear in the source file.
26    *
27    *  2) No right is granted to use any trade name, trademark, or
28    *     logo of Broadcom Corporation.  The "Broadcom Corporation"
29    *     name may not be used to endorse or promote products derived
30    *     from this software without the prior written permission of
31    *     Broadcom Corporation.
32    *
33    *  3) THIS SOFTWARE IS PROVIDED "AS-IS" AND ANY EXPRESS OR
34    *     IMPLIED WARRANTIES, INCLUDING BUT NOT LIMITED TO, ANY IMPLIED
35    *     WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
36    *     PURPOSE, OR NON-INFRINGEMENT ARE DISCLAIMED. IN NO EVENT
37    *     SHALL BROADCOM BE LIABLE FOR ANY DAMAGES WHATSOEVER, AND IN
38    *     PARTICULAR, BROADCOM SHALL NOT BE LIABLE FOR DIRECT, INDIRECT,
39    *     INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
40    *     (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
41    *     GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
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43    *     OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
44    *     TORT (INCLUDING NEGLIGENCE OR OTHERWISE), EVEN IF ADVISED OF
45    *     THE POSSIBILITY OF SUCH DAMAGE.
46    ********************************************************************* */
47
48
49#ifndef _JEDEC_H
50#define _JEDEC_H
51
52/*  *********************************************************************
53    *  JEDEC constants (serial presence detect offsets and bit fields)
54    ********************************************************************* */
55
56#define JEDEC_SPD_MEMTYPE	2	/* memory type (sdram, ddr, etc.) */
57#define JEDEC_SPD_ROWS		3	/* row bits */
58#define JEDEC_SPD_COLS		4	/* column bits */
59#define JEDEC_SPD_SIDES		5	/* number of sides */
60#define JEDEC_SPD_WIDTH		6	/* and 7, bit width of device */
61#define JEDEC_SPD_BANKS		17	/* number of banks */
62#define JEDEC_SPD_DENSITY	31	/* module bank density */
63#define JEDEC_SPD_ECC_INFO	11
64
65#define JEDEC_SPD_tCK25		9	/* tCK @ CAS 2.5 */
66#define JEDEC_SPD_tCK20		23	/* tCK @ CAS 2.0 */
67#define JEDEC_SPD_tCK10		25	/* tCK @ CAS 1.0 */
68#define JEDEC_SPD_RFSH		12	/* refresh rate */
69#define JEDEC_SPD_CASLATENCIES	18	/* CAS Latencies supported */
70#define JEDEC_SPD_ATTRIBUTES	21	/* module attributes */
71#define JEDEC_SPD_tRAS		30	/* tRAS */
72#define JEDEC_SPD_tRP		27	/* tRP */
73#define JEDEC_SPD_tRRD		28	/* tRRD */
74#define JEDEC_SPD_tRCD		29	/* tRCD */
75#define JEDEC_SPD_tRFC		42	/* tRFC */
76#define JEDEC_SPD_tRC		41	/* tRC */
77#define JEDEC_SPD_tRTP		38	/* tRTP */
78#define JEDEC_SPD_DIMMTYPE	20	/* Dimm type DDR2 only */
79
80#define JEDEC_SPD_SIZE		46	/* number of SPD bytes we will read
81                                           (adequate for DDR SDRAM) */
82
83#define JEDEC_MEMTYPE_DDRSDRAM	1
84#define JEDEC_MEMTYPE_DDRSDRAM2	7
85#define JEDEC_MEMTYPE_SDRAM	4
86#define SPD_MEMTYPE_FCRAM	0x17	/* Use what SMART defines it as */
87#define SPD_MEMTYPE_DDR2	0x08
88
89#define	JEDEC_CASLAT_DDR2_6	0x40
90#define	JEDEC_CASLAT_DDR2_5	0x20
91#define JEDEC_CASLAT_DDR2_4	0x10
92#define JEDEC_CASLAT_DDR2_3	0x08
93#define JEDEC_CASLAT_DDR2_2	0x04
94
95#define JEDEC_CASLAT_40		0x40
96#define JEDEC_CASLAT_35		0x20
97#define JEDEC_CASLAT_30		0x10
98#define JEDEC_CASLAT_25		0x08
99#define JEDEC_CASLAT_20		0x04
100#define JEDEC_CASLAT_15		0x02
101#define JEDEC_CASLAT_10		0x01
102
103#define JEDEC_ATTRIB_REG	0x02
104
105#define JEDEC_FLG_ECC_SUPPORT	0x02
106
107#define JEDEC_RFSH_MASK		0x7F
108#define JEDEC_RFSH_64khz	0
109#define JEDEC_RFSH_256khz	1
110#define JEDEC_RFSH_128khz	2
111#define JEDEC_RFSH_32khz	3
112#define JEDEC_RFSH_16khz	4
113#define JEDEC_RFSH_8khz		5
114
115#define JEDEC_DIMMTYPE_RDIMM	0x01
116#define JEDEC_DIMMTYPE_UDIMM	0x02
117#define JEDEC_DIMMTYPE_MRDIMM	0x10
118
119#endif /* _JEDEC_H */
120