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sdrc.h
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1 #ifndef __ARCH_ARM_MACH_OMAP2_SDRC_H
2 #define __ARCH_ARM_MACH_OMAP2_SDRC_H
3 
4 /*
5  * OMAP2 SDRC 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 #undef DEBUG
17 
18 #include <plat/sdrc.h>
19 
20 #ifndef __ASSEMBLER__
21 
22 #include <linux/io.h>
23 
24 extern void __iomem *omap2_sdrc_base;
25 extern void __iomem *omap2_sms_base;
26 
27 #define OMAP_SDRC_REGADDR(reg) (omap2_sdrc_base + (reg))
28 #define OMAP_SMS_REGADDR(reg) (omap2_sms_base + (reg))
29 
30 /* SDRC global register get/set */
31 
32 static inline void sdrc_write_reg(u32 val, u16 reg)
33 {
35 }
36 
37 static inline u32 sdrc_read_reg(u16 reg)
38 {
39  return __raw_readl(OMAP_SDRC_REGADDR(reg));
40 }
41 
42 /* SMS global register get/set */
43 
44 static inline void sms_write_reg(u32 val, u16 reg)
45 {
46  __raw_writel(val, OMAP_SMS_REGADDR(reg));
47 }
48 
49 static inline u32 sms_read_reg(u16 reg)
50 {
51  return __raw_readl(OMAP_SMS_REGADDR(reg));
52 }
53 #else
54 #define OMAP242X_SDRC_REGADDR(reg) \
55  OMAP2_L3_IO_ADDRESS(OMAP2420_SDRC_BASE + (reg))
56 #define OMAP243X_SDRC_REGADDR(reg) \
57  OMAP2_L3_IO_ADDRESS(OMAP243X_SDRC_BASE + (reg))
58 #define OMAP34XX_SDRC_REGADDR(reg) \
59  OMAP2_L3_IO_ADDRESS(OMAP343X_SDRC_BASE + (reg))
60 #endif /* __ASSEMBLER__ */
61 
62 /* Minimum frequency that the SDRC DLL can lock at */
63 #define MIN_SDRC_DLL_LOCK_FREQ 83000000
64 
65 /* Scale factor for fixed-point arith in omap3_core_dpll_m2_set_rate() */
66 #define SDRC_MPURATE_SCALE 8
67 
68 /* 2^SDRC_MPURATE_BASE_SHIFT: MPU MHz that SDRC_MPURATE_LOOPS is defined for */
69 #define SDRC_MPURATE_BASE_SHIFT 9
70 
71 /*
72  * SDRC_MPURATE_LOOPS: Number of MPU loops to execute at
73  * 2^MPURATE_BASE_SHIFT MHz for SDRC to stabilize
74  */
75 #define SDRC_MPURATE_LOOPS 96
76 
77 #endif