1 #ifndef ____ASM_ARCH_SDRC_H
2 #define ____ASM_ARCH_SDRC_H
5 * OMAP2/3 SDRC/SMS register definitions
7 * Copyright (C) 2007-2008 Texas Instruments, Inc.
8 * Copyright (C) 2007-2008 Nokia Corporation
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.
21 /* SDRC register offsets - read/write with sdrc_{read,write}_reg() */
23 #define SDRC_SYSCONFIG 0x010
24 #define SDRC_DLLA_CTRL 0x060
25 #define SDRC_DLLA_STATUS 0x064
26 #define SDRC_DLLB_CTRL 0x068
27 #define SDRC_DLLB_STATUS 0x06C
28 #define SDRC_POWER 0x070
29 #define SDRC_MR_0 0x084
30 #define SDRC_ACTIM_CTRL_A_0 0x09c
31 #define SDRC_ACTIM_CTRL_B_0 0x0a0
32 #define SDRC_RFR_CTRL_0 0x0a4
33 #define SDRC_MR_1 0x0B4
34 #define SDRC_ACTIM_CTRL_A_1 0x0C4
35 #define SDRC_ACTIM_CTRL_B_1 0x0C8
36 #define SDRC_RFR_CTRL_1 0x0D4
39 * These values represent the number of memory clock cycles between
40 * autorefresh initiation. They assume 1 refresh per 64 ms (JEDEC), 8192
41 * rows per device, and include a subtraction of a 50 cycle window in the
42 * event that the autorefresh command is delayed due to other SDRC activity.
43 * The '| 1' sets the ARE field to send one autorefresh when the autorefresh
46 * These represent optimal values for common parts, it won't work for all.
47 * As long as you scale down, most parameters are still work, they just
48 * become sub-optimal. The RFR value goes in the opposite direction. If you
49 * don't adjust it down as your clock period increases the refresh interval
50 * will not be met. Setting all parameters for complete worst case may work,
51 * but may cut memory performance by 2x. Due to errata the DLLs need to be
52 * unlocked and their value needs run time calibration. A dynamic call is
53 * need for that as no single right value exists acorss production samples.
55 * Only the FULL speed values are given. Current code is such that rate
56 * changes must be made at DPLLoutx2. The actual value adjustment for low
57 * frequency operation will be handled by omap_set_performance()
59 * By having the boot loader boot up in the fastest L4 speed available likely
60 * will result in something which you can switch between.
62 #define SDRC_RFR_CTRL_165MHz (0x00044c00 | 1)
63 #define SDRC_RFR_CTRL_133MHz (0x0003de00 | 1)
64 #define SDRC_RFR_CTRL_100MHz (0x0002da01 | 1)
65 #define SDRC_RFR_CTRL_110MHz (0x0002da01 | 1) /* Need to calc */
66 #define SDRC_RFR_CTRL_BYPASS (0x00005000 | 1) /* Need to calc */
73 #define OMAP242X_SMS_REGADDR(reg) \
74 (void __iomem *)IO_ADDRESS(OMAP2420_SMS_BASE + reg)
75 #define OMAP243X_SMS_REGADDR(reg) \
76 (void __iomem *)IO_ADDRESS(OMAP243X_SMS_BASE + reg)
77 #define OMAP343X_SMS_REGADDR(reg) \
78 (void __iomem *)IO_ADDRESS(OMAP343X_SMS_BASE + reg)
80 /* SMS register offsets - read/write with sms_{read,write}_reg() */
82 #define SMS_SYSCONFIG 0x010
83 /* REVISIT: fill in other SMS registers here */
89 * struct omap_sdrc_params - SDRC parameters for a given SDRC clock rate
90 * @rate: SDRC clock rate (in Hz)
91 * @actim_ctrla: Value to program to SDRC_ACTIM_CTRLA for this rate
92 * @actim_ctrlb: Value to program to SDRC_ACTIM_CTRLB for this rate
93 * @rfr_ctrl: Value to program to SDRC_RFR_CTRL for this rate
94 * @mr: Value to program to SDRC_MR for this rate
96 * This structure holds a pre-computed set of register values for the
97 * SDRC for a given SDRC clock rate and SDRAM chip. These are
98 * intended to be pre-computed and specified in an array in the board-*.c
99 * files. The structure is keyed off the 'rate' field.
101 struct omap_sdrc_params {
109 void __init omap2_sdrc_init(struct omap_sdrc_params *sdrc_cs0,
110 struct omap_sdrc_params *sdrc_cs1);
111 int omap2_sdrc_get_params(unsigned long r,
112 struct omap_sdrc_params **sdrc_cs0,
113 struct omap_sdrc_params **sdrc_cs1);
115 #ifdef CONFIG_ARCH_OMAP2
117 struct memory_timings {
118 u32 m_type; /* ddr = 1, sdr = 0 */
119 u32 dll_mode; /* use lock mode = 1, unlock mode = 0 */
120 u32 slow_dll_ctrl; /* unlock mode, dll value for slow speed */
121 u32 fast_dll_ctrl; /* unlock mode, dll value for fast speed */
122 u32 base_cs; /* base chip select to use for calculations */
125 extern void omap2xxx_sdrc_init_params(u32 force_lock_to_unlock_mode);
127 u32 omap2xxx_sdrc_dll_is_unlocked(void);
128 u32 omap2xxx_sdrc_reprogram(u32 level, u32 force);
130 #endif /* CONFIG_ARCH_OMAP2 */
132 #endif /* __ASSEMBLER__ */