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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 Texas Instruments, Inc. | |
8 | * Copyright (C) 2007 Nokia Corporation | |
9 | * | |
10 | * Written by Paul Walmsley | |
11 | * | |
12 | * This program is free software; you can redistribute it and/or modify | |
13 | * it under the terms of the GNU General Public License version 2 as | |
14 | * published by the Free Software Foundation. | |
15 | */ | |
16 | ||
a09e64fb | 17 | #include <mach/io.h> |
69d88a00 PW |
18 | |
19 | /* SDRC register offsets - read/write with sdrc_{read,write}_reg() */ | |
20 | ||
21 | #define SDRC_SYSCONFIG 0x010 | |
22 | #define SDRC_DLLA_CTRL 0x060 | |
23 | #define SDRC_DLLA_STATUS 0x064 | |
24 | #define SDRC_DLLB_CTRL 0x068 | |
25 | #define SDRC_DLLB_STATUS 0x06C | |
26 | #define SDRC_POWER 0x070 | |
27 | #define SDRC_MR_0 0x084 | |
cc26b3b0 SMK |
28 | #define SDRC_ACTIM_CTRL_A_0 0x09c |
29 | #define SDRC_ACTIM_CTRL_B_0 0x0a0 | |
69d88a00 PW |
30 | #define SDRC_RFR_CTRL_0 0x0a4 |
31 | ||
32 | /* | |
33 | * These values represent the number of memory clock cycles between | |
34 | * autorefresh initiation. They assume 1 refresh per 64 ms (JEDEC), 8192 | |
35 | * rows per device, and include a subtraction of a 50 cycle window in the | |
36 | * event that the autorefresh command is delayed due to other SDRC activity. | |
37 | * The '| 1' sets the ARE field to send one autorefresh when the autorefresh | |
38 | * counter reaches 0. | |
39 | * | |
40 | * These represent optimal values for common parts, it won't work for all. | |
41 | * As long as you scale down, most parameters are still work, they just | |
42 | * become sub-optimal. The RFR value goes in the opposite direction. If you | |
43 | * don't adjust it down as your clock period increases the refresh interval | |
44 | * will not be met. Setting all parameters for complete worst case may work, | |
45 | * but may cut memory performance by 2x. Due to errata the DLLs need to be | |
46 | * unlocked and their value needs run time calibration. A dynamic call is | |
47 | * need for that as no single right value exists acorss production samples. | |
48 | * | |
49 | * Only the FULL speed values are given. Current code is such that rate | |
50 | * changes must be made at DPLLoutx2. The actual value adjustment for low | |
51 | * frequency operation will be handled by omap_set_performance() | |
52 | * | |
53 | * By having the boot loader boot up in the fastest L4 speed available likely | |
54 | * will result in something which you can switch between. | |
55 | */ | |
56 | #define SDRC_RFR_CTRL_165MHz (0x00044c00 | 1) | |
57 | #define SDRC_RFR_CTRL_133MHz (0x0003de00 | 1) | |
58 | #define SDRC_RFR_CTRL_100MHz (0x0002da01 | 1) | |
59 | #define SDRC_RFR_CTRL_110MHz (0x0002da01 | 1) /* Need to calc */ | |
60 | #define SDRC_RFR_CTRL_BYPASS (0x00005000 | 1) /* Need to calc */ | |
61 | ||
62 | ||
63 | /* | |
64 | * SMS register access | |
65 | */ | |
66 | ||
67 | ||
e8a91c95 RK |
68 | #define OMAP242X_SMS_REGADDR(reg) IO_ADDRESS(OMAP2420_SMS_BASE + reg) |
69 | #define OMAP243X_SMS_REGADDR(reg) IO_ADDRESS(OMAP243X_SMS_BASE + reg) | |
70 | #define OMAP343X_SMS_REGADDR(reg) IO_ADDRESS(OMAP343X_SMS_BASE + reg) | |
69d88a00 PW |
71 | |
72 | /* SMS register offsets - read/write with sms_{read,write}_reg() */ | |
73 | ||
74 | #define SMS_SYSCONFIG 0x010 | |
75 | /* REVISIT: fill in other SMS registers here */ | |
76 | ||
f8de9b2c PW |
77 | #ifndef __ASSEMBLER__ |
78 | ||
79 | struct memory_timings { | |
80 | u32 m_type; /* ddr = 1, sdr = 0 */ | |
81 | u32 dll_mode; /* use lock mode = 1, unlock mode = 0 */ | |
82 | u32 slow_dll_ctrl; /* unlock mode, dll value for slow speed */ | |
83 | u32 fast_dll_ctrl; /* unlock mode, dll value for fast speed */ | |
84 | u32 base_cs; /* base chip select to use for calculations */ | |
85 | }; | |
86 | ||
87 | extern void omap2_init_memory_params(u32 force_lock_to_unlock_mode); | |
88 | extern u32 omap2_memory_get_slow_dll_ctrl(void); | |
89 | extern u32 omap2_memory_get_fast_dll_ctrl(void); | |
90 | extern u32 omap2_memory_get_type(void); | |
91 | u32 omap2_dll_force_needed(void); | |
92 | u32 omap2_reprogram_sdrc(u32 level, u32 force); | |
93 | void __init omap2_init_memory(void); | |
94 | ||
95 | #endif | |
96 | ||
97 | ||
69d88a00 | 98 | #endif |