summaryrefslogtreecommitdiff
path: root/arch/arm/plat-omap/include/plat/sdrc.h
blob: efd87c8dda69bb0f9d5dd82bf1b473bac21e9459 (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
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
#ifndef ____ASM_ARCH_SDRC_H
#define ____ASM_ARCH_SDRC_H

/*
 * OMAP2/3 SDRC/SMS register definitions
 *
 * Copyright (C) 2007-2008 Texas Instruments, Inc.
 * Copyright (C) 2007-2008 Nokia Corporation
 *
 * Tony Lindgren
 * Paul Walmsley
 * Richard Woodruff
 *
 * 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 <mach/io.h>

/* SDRC register offsets - read/write with sdrc_{read,write}_reg() */

#define SDRC_SYSCONFIG		0x010
#define SDRC_CS_CFG		0x040
#define SDRC_SHARING		0x044
#define SDRC_ERR_TYPE		0x04C
#define SDRC_DLLA_CTRL		0x060
#define SDRC_DLLA_STATUS	0x064
#define SDRC_DLLB_CTRL		0x068
#define SDRC_DLLB_STATUS	0x06C
#define SDRC_POWER		0x070
#define SDRC_MCFG_0		0x080
#define SDRC_MR_0		0x084
#define SDRC_EMR2_0		0x08c
#define SDRC_ACTIM_CTRL_A_0	0x09c
#define SDRC_ACTIM_CTRL_B_0	0x0a0
#define SDRC_RFR_CTRL_0		0x0a4
#define SDRC_MANUAL_0		0x0a8
#define SDRC_MCFG_1		0x0B0
#define SDRC_MR_1		0x0B4
#define SDRC_EMR2_1		0x0BC
#define SDRC_ACTIM_CTRL_A_1	0x0C4
#define SDRC_ACTIM_CTRL_B_1	0x0C8
#define SDRC_RFR_CTRL_1		0x0D4
#define SDRC_MANUAL_1		0x0D8

#define SDRC_POWER_AUTOCOUNT_SHIFT	8
#define SDRC_POWER_AUTOCOUNT_MASK	(0xffff << SDRC_POWER_AUTOCOUNT_SHIFT)
#define SDRC_POWER_CLKCTRL_SHIFT	4
#define SDRC_POWER_CLKCTRL_MASK		(0x3 << SDRC_POWER_CLKCTRL_SHIFT)
#define SDRC_SELF_REFRESH_ON_AUTOCOUNT	(0x2 << SDRC_POWER_CLKCTRL_SHIFT)

/*
 * These values represent the number of memory clock cycles between
 * autorefresh initiation.  They assume 1 refresh per 64 ms (JEDEC), 8192
 * rows per device, and include a subtraction of a 50 cycle window in the
 * event that the autorefresh command is delayed due to other SDRC activity.
 * The '| 1' sets the ARE field to send one autorefresh when the autorefresh
 * counter reaches 0.
 *
 * These represent optimal values for common parts, it won't work for all.
 * As long as you scale down, most parameters are still work, they just
 * become sub-optimal. The RFR value goes in the opposite direction. If you
 * don't adjust it down as your clock period increases the refresh interval
 * will not be met. Setting all parameters for complete worst case may work,
 * but may cut memory performance by 2x. Due to errata the DLLs need to be
 * unlocked and their value needs run time calibration.	A dynamic call is
 * need for that as no single right value exists acorss production samples.
 *
 * Only the FULL speed values are given. Current code is such that rate
 * changes must be made at DPLLoutx2. The actual value adjustment for low
 * frequency operation will be handled by omap_set_performance()
 *
 * By having the boot loader boot up in the fastest L4 speed available likely
 * will result in something which you can switch between.
 */
#define SDRC_RFR_CTRL_165MHz	(0x00044c00 | 1)
#define SDRC_RFR_CTRL_133MHz	(0x0003de00 | 1)
#define SDRC_RFR_CTRL_100MHz	(0x0002da01 | 1)
#define SDRC_RFR_CTRL_110MHz	(0x0002da01 | 1) /* Need to calc */
#define SDRC_RFR_CTRL_BYPASS	(0x00005000 | 1) /* Need to calc */


/*
 * SMS register access
 */

#define OMAP242X_SMS_REGADDR(reg)					\
		(void __iomem *)OMAP2_L3_IO_ADDRESS(OMAP2420_SMS_BASE + reg)
#define OMAP243X_SMS_REGADDR(reg)					\
		(void __iomem *)OMAP2_L3_IO_ADDRESS(OMAP243X_SMS_BASE + reg)
#define OMAP343X_SMS_REGADDR(reg)					\
		(void __iomem *)OMAP2_L3_IO_ADDRESS(OMAP343X_SMS_BASE + reg)

/* SMS register offsets - read/write with sms_{read,write}_reg() */

#define SMS_SYSCONFIG			0x010
#define SMS_ROT_CONTROL(context)	(0x180 + 0x10 * context)
#define SMS_ROT_SIZE(context)		(0x184 + 0x10 * context)
#define SMS_ROT_PHYSICAL_BA(context)	(0x188 + 0x10 * context)
/* REVISIT: fill in other SMS registers here */


#ifndef __ASSEMBLER__

/**
 * struct omap_sdrc_params - SDRC parameters for a given SDRC clock rate
 * @rate: SDRC clock rate (in Hz)
 * @actim_ctrla: Value to program to SDRC_ACTIM_CTRLA for this rate
 * @actim_ctrlb: Value to program to SDRC_ACTIM_CTRLB for this rate
 * @rfr_ctrl: Value to program to SDRC_RFR_CTRL for this rate
 * @mr: Value to program to SDRC_MR for this rate
 *
 * This structure holds a pre-computed set of register values for the
 * SDRC for a given SDRC clock rate and SDRAM chip.  These are
 * intended to be pre-computed and specified in an array in the board-*.c
 * files.  The structure is keyed off the 'rate' field.
 */
struct omap_sdrc_params {
	unsigned long rate;
	u32 actim_ctrla;
	u32 actim_ctrlb;
	u32 rfr_ctrl;
	u32 mr;
};

void __init omap2_sdrc_init(struct omap_sdrc_params *sdrc_cs0,
			    struct omap_sdrc_params *sdrc_cs1);
int omap2_sdrc_get_params(unsigned long r,
			  struct omap_sdrc_params **sdrc_cs0,
			  struct omap_sdrc_params **sdrc_cs1);
void omap2_sms_save_context(void);
void omap2_sms_restore_context(void);

void omap2_sms_write_rot_control(u32 val, unsigned ctx);
void omap2_sms_write_rot_size(u32 val, unsigned ctx);
void omap2_sms_write_rot_physical_ba(u32 val, unsigned ctx);

#ifdef CONFIG_ARCH_OMAP2

struct memory_timings {
	u32 m_type;		/* ddr = 1, sdr = 0 */
	u32 dll_mode;		/* use lock mode = 1, unlock mode = 0 */
	u32 slow_dll_ctrl;	/* unlock mode, dll value for slow speed */
	u32 fast_dll_ctrl;	/* unlock mode, dll value for fast speed */
	u32 base_cs;		/* base chip select to use for calculations */
};

extern void omap2xxx_sdrc_init_params(u32 force_lock_to_unlock_mode);
struct omap_sdrc_params *rx51_get_sdram_timings(void);

u32 omap2xxx_sdrc_dll_is_unlocked(void);
u32 omap2xxx_sdrc_reprogram(u32 level, u32 force);

#endif  /* CONFIG_ARCH_OMAP2 */

#endif  /* __ASSEMBLER__ */

#endif