1 #ifndef ____ASM_ARCH_SDRC_H
2 #define ____ASM_ARCH_SDRC_H
3
4 /*
5 * OMAP2/3 SDRC/SMS register definitions
6 *
7 * Copyright (C) 2007-2008 Texas Instruments, Inc.
8 * Copyright (C) 2007-2008 Nokia Corporation
9 *
10 * Tony Lindgren
11 * Paul Walmsley
12 * Richard Woodruff
13 *
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License version 2 as
16 * published by the Free Software Foundation.
17 */
18
19 #include <mach/io.h>
20
21 /* SDRC register offsets - read/write with sdrc_{read,write}_reg() */
22
23 #define SDRC_SYSCONFIG 0x010
24 #define SDRC_CS_CFG 0x040
25 #define SDRC_SHARING 0x044
26 #define SDRC_ERR_TYPE 0x04C
27 #define SDRC_DLLA_CTRL 0x060
28 #define SDRC_DLLA_STATUS 0x064
29 #define SDRC_DLLB_CTRL 0x068
30 #define SDRC_DLLB_STATUS 0x06C
31 #define SDRC_POWER 0x070
32 #define SDRC_MCFG_0 0x080
33 #define SDRC_MR_0 0x084
34 #define SDRC_EMR2_0 0x08c
35 #define SDRC_ACTIM_CTRL_A_0 0x09c
36 #define SDRC_ACTIM_CTRL_B_0 0x0a0
37 #define SDRC_RFR_CTRL_0 0x0a4
38 #define SDRC_MANUAL_0 0x0a8
39 #define SDRC_MCFG_1 0x0B0
40 #define SDRC_MR_1 0x0B4
41 #define SDRC_EMR2_1 0x0BC
42 #define SDRC_ACTIM_CTRL_A_1 0x0C4
43 #define SDRC_ACTIM_CTRL_B_1 0x0C8
44 #define SDRC_RFR_CTRL_1 0x0D4
45 #define SDRC_MANUAL_1 0x0D8
46
47 #define SDRC_POWER_AUTOCOUNT_SHIFT 8
48 #define SDRC_POWER_AUTOCOUNT_MASK (0xffff << SDRC_POWER_AUTOCOUNT_SHIFT)
49 #define SDRC_POWER_CLKCTRL_SHIFT 4
50 #define SDRC_POWER_CLKCTRL_MASK (0x3 << SDRC_POWER_CLKCTRL_SHIFT)
51 #define SDRC_SELF_REFRESH_ON_AUTOCOUNT (0x2 << SDRC_POWER_CLKCTRL_SHIFT)
52
53 /*
54 * These values represent the number of memory clock cycles between
55 * autorefresh initiation. They assume 1 refresh per 64 ms (JEDEC), 8192
56 * rows per device, and include a subtraction of a 50 cycle window in the
57 * event that the autorefresh command is delayed due to other SDRC activity.
58 * The '| 1' sets the ARE field to send one autorefresh when the autorefresh
59 * counter reaches 0.
60 *
61 * These represent optimal values for common parts, it won't work for all.
62 * As long as you scale down, most parameters are still work, they just
63 * become sub-optimal. The RFR value goes in the opposite direction. If you
64 * don't adjust it down as your clock period increases the refresh interval
65 * will not be met. Setting all parameters for complete worst case may work,
66 * but may cut memory performance by 2x. Due to errata the DLLs need to be
67 * unlocked and their value needs run time calibration. A dynamic call is
68 * need for that as no single right value exists acorss production samples.
69 *
70 * Only the FULL speed values are given. Current code is such that rate
71 * changes must be made at DPLLoutx2. The actual value adjustment for low
72 * frequency operation will be handled by omap_set_performance()
73 *
74 * By having the boot loader boot up in the fastest L4 speed available likely
75 * will result in something which you can switch between.
76 */
77 #define SDRC_RFR_CTRL_165MHz (0x00044c00 | 1)
78 #define SDRC_RFR_CTRL_133MHz (0x0003de00 | 1)
79 #define SDRC_RFR_CTRL_100MHz (0x0002da01 | 1)
80 #define SDRC_RFR_CTRL_110MHz (0x0002da01 | 1) /* Need to calc */
81 #define SDRC_RFR_CTRL_BYPASS (0x00005000 | 1) /* Need to calc */
82
83
84 /*
85 * SMS register access
86 */
87
88 #define OMAP242X_SMS_REGADDR(reg) \
89 (void __iomem *)OMAP2_L3_IO_ADDRESS(OMAP2420_SMS_BASE + reg)
90 #define OMAP243X_SMS_REGADDR(reg) \
91 (void __iomem *)OMAP2_L3_IO_ADDRESS(OMAP243X_SMS_BASE + reg)
92 #define OMAP343X_SMS_REGADDR(reg) \
93 (void __iomem *)OMAP2_L3_IO_ADDRESS(OMAP343X_SMS_BASE + reg)
94
95 /* SMS register offsets - read/write with sms_{read,write}_reg() */
96
97 #define SMS_SYSCONFIG 0x010
98 #define SMS_ROT_CONTROL(context) (0x180 + 0x10 * context)
99 #define SMS_ROT_SIZE(context) (0x184 + 0x10 * context)
100 #define SMS_ROT_PHYSICAL_BA(context) (0x188 + 0x10 * context)
101 /* REVISIT: fill in other SMS registers here */
102
103
104 #ifndef __ASSEMBLER__
105
106 /**
107 * struct omap_sdrc_params - SDRC parameters for a given SDRC clock rate
108 * @rate: SDRC clock rate (in Hz)
109 * @actim_ctrla: Value to program to SDRC_ACTIM_CTRLA for this rate
110 * @actim_ctrlb: Value to program to SDRC_ACTIM_CTRLB for this rate
111 * @rfr_ctrl: Value to program to SDRC_RFR_CTRL for this rate
112 * @mr: Value to program to SDRC_MR for this rate
113 *
114 * This structure holds a pre-computed set of register values for the
115 * SDRC for a given SDRC clock rate and SDRAM chip. These are
116 * intended to be pre-computed and specified in an array in the board-*.c
117 * files. The structure is keyed off the 'rate' field.
118 */
119 struct omap_sdrc_params {
120 unsigned long rate;
121 u32 actim_ctrla;
122 u32 actim_ctrlb;
123 u32 rfr_ctrl;
124 u32 mr;
125 };
126
127 #if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3)
128 void omap2_sdrc_init(struct omap_sdrc_params *sdrc_cs0,
129 struct omap_sdrc_params *sdrc_cs1);
130 #else
omap2_sdrc_init(struct omap_sdrc_params * sdrc_cs0,struct omap_sdrc_params * sdrc_cs1)131 static inline void __init omap2_sdrc_init(struct omap_sdrc_params *sdrc_cs0,
132 struct omap_sdrc_params *sdrc_cs1) {};
133 #endif
134
135 int omap2_sdrc_get_params(unsigned long r,
136 struct omap_sdrc_params **sdrc_cs0,
137 struct omap_sdrc_params **sdrc_cs1);
138 void omap2_sms_save_context(void);
139 void omap2_sms_restore_context(void);
140
141 void omap2_sms_write_rot_control(u32 val, unsigned ctx);
142 void omap2_sms_write_rot_size(u32 val, unsigned ctx);
143 void omap2_sms_write_rot_physical_ba(u32 val, unsigned ctx);
144
145 #ifdef CONFIG_ARCH_OMAP2
146
147 struct memory_timings {
148 u32 m_type; /* ddr = 1, sdr = 0 */
149 u32 dll_mode; /* use lock mode = 1, unlock mode = 0 */
150 u32 slow_dll_ctrl; /* unlock mode, dll value for slow speed */
151 u32 fast_dll_ctrl; /* unlock mode, dll value for fast speed */
152 u32 base_cs; /* base chip select to use for calculations */
153 };
154
155 extern void omap2xxx_sdrc_init_params(u32 force_lock_to_unlock_mode);
156 struct omap_sdrc_params *rx51_get_sdram_timings(void);
157
158 u32 omap2xxx_sdrc_dll_is_unlocked(void);
159 u32 omap2xxx_sdrc_reprogram(u32 level, u32 force);
160
161 #endif /* CONFIG_ARCH_OMAP2 */
162
163 #endif /* __ASSEMBLER__ */
164
165 #endif
166