1 #ifndef __ARCH_ARM_MACH_OMAP2_SDRC_H
2 #define __ARCH_ARM_MACH_OMAP2_SDRC_H
3
4 /*
5 * OMAP2/3 SDRC/SMS macros and prototypes
6 *
7 * Copyright (C) 2007-2008, 2012 Texas Instruments, Inc.
8 * Copyright (C) 2007-2008 Nokia Corporation
9 *
10 * Paul Walmsley
11 * Tony Lindgren
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 #undef DEBUG
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
sdrc_write_reg(u32 val,u16 reg)32 static inline void sdrc_write_reg(u32 val, u16 reg)
33 {
34 __raw_writel(val, OMAP_SDRC_REGADDR(reg));
35 }
36
sdrc_read_reg(u16 reg)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
sms_write_reg(u32 val,u16 reg)44 static inline void sms_write_reg(u32 val, u16 reg)
45 {
46 __raw_writel(val, OMAP_SMS_REGADDR(reg));
47 }
48
sms_read_reg(u16 reg)49 static inline u32 sms_read_reg(u16 reg)
50 {
51 return __raw_readl(OMAP_SMS_REGADDR(reg));
52 }
53
54 extern void omap2_set_globals_sdrc(void __iomem *sdrc, void __iomem *sms);
55
56
57 /**
58 * struct omap_sdrc_params - SDRC parameters for a given SDRC clock rate
59 * @rate: SDRC clock rate (in Hz)
60 * @actim_ctrla: Value to program to SDRC_ACTIM_CTRLA for this rate
61 * @actim_ctrlb: Value to program to SDRC_ACTIM_CTRLB for this rate
62 * @rfr_ctrl: Value to program to SDRC_RFR_CTRL for this rate
63 * @mr: Value to program to SDRC_MR for this rate
64 *
65 * This structure holds a pre-computed set of register values for the
66 * SDRC for a given SDRC clock rate and SDRAM chip. These are
67 * intended to be pre-computed and specified in an array in the board-*.c
68 * files. The structure is keyed off the 'rate' field.
69 */
70 struct omap_sdrc_params {
71 unsigned long rate;
72 u32 actim_ctrla;
73 u32 actim_ctrlb;
74 u32 rfr_ctrl;
75 u32 mr;
76 };
77
78 #ifdef CONFIG_SOC_HAS_OMAP2_SDRC
79 void omap2_sdrc_init(struct omap_sdrc_params *sdrc_cs0,
80 struct omap_sdrc_params *sdrc_cs1);
81 #else
omap2_sdrc_init(struct omap_sdrc_params * sdrc_cs0,struct omap_sdrc_params * sdrc_cs1)82 static inline void __init omap2_sdrc_init(struct omap_sdrc_params *sdrc_cs0,
83 struct omap_sdrc_params *sdrc_cs1) {};
84 #endif
85
86 int omap2_sdrc_get_params(unsigned long r,
87 struct omap_sdrc_params **sdrc_cs0,
88 struct omap_sdrc_params **sdrc_cs1);
89 void omap2_sms_save_context(void);
90 void omap2_sms_restore_context(void);
91
92 struct memory_timings {
93 u32 m_type; /* ddr = 1, sdr = 0 */
94 u32 dll_mode; /* use lock mode = 1, unlock mode = 0 */
95 u32 slow_dll_ctrl; /* unlock mode, dll value for slow speed */
96 u32 fast_dll_ctrl; /* unlock mode, dll value for fast speed */
97 u32 base_cs; /* base chip select to use for calculations */
98 };
99
100 extern void omap2xxx_sdrc_init_params(u32 force_lock_to_unlock_mode);
101 struct omap_sdrc_params *rx51_get_sdram_timings(void);
102
103 u32 omap2xxx_sdrc_dll_is_unlocked(void);
104 u32 omap2xxx_sdrc_reprogram(u32 level, u32 force);
105
106
107 #else
108 #define OMAP242X_SDRC_REGADDR(reg) \
109 OMAP2_L3_IO_ADDRESS(OMAP2420_SDRC_BASE + (reg))
110 #define OMAP243X_SDRC_REGADDR(reg) \
111 OMAP2_L3_IO_ADDRESS(OMAP243X_SDRC_BASE + (reg))
112 #define OMAP34XX_SDRC_REGADDR(reg) \
113 OMAP2_L3_IO_ADDRESS(OMAP343X_SDRC_BASE + (reg))
114
115 #endif /* __ASSEMBLER__ */
116
117 /* Minimum frequency that the SDRC DLL can lock at */
118 #define MIN_SDRC_DLL_LOCK_FREQ 83000000
119
120 /* Scale factor for fixed-point arith in omap3_core_dpll_m2_set_rate() */
121 #define SDRC_MPURATE_SCALE 8
122
123 /* 2^SDRC_MPURATE_BASE_SHIFT: MPU MHz that SDRC_MPURATE_LOOPS is defined for */
124 #define SDRC_MPURATE_BASE_SHIFT 9
125
126 /*
127 * SDRC_MPURATE_LOOPS: Number of MPU loops to execute at
128 * 2^MPURATE_BASE_SHIFT MHz for SDRC to stabilize
129 */
130 #define SDRC_MPURATE_LOOPS 96
131
132 /* SDRC register offsets - read/write with sdrc_{read,write}_reg() */
133
134 #define SDRC_SYSCONFIG 0x010
135 #define SDRC_CS_CFG 0x040
136 #define SDRC_SHARING 0x044
137 #define SDRC_ERR_TYPE 0x04C
138 #define SDRC_DLLA_CTRL 0x060
139 #define SDRC_DLLA_STATUS 0x064
140 #define SDRC_DLLB_CTRL 0x068
141 #define SDRC_DLLB_STATUS 0x06C
142 #define SDRC_POWER 0x070
143 #define SDRC_MCFG_0 0x080
144 #define SDRC_MR_0 0x084
145 #define SDRC_EMR2_0 0x08c
146 #define SDRC_ACTIM_CTRL_A_0 0x09c
147 #define SDRC_ACTIM_CTRL_B_0 0x0a0
148 #define SDRC_RFR_CTRL_0 0x0a4
149 #define SDRC_MANUAL_0 0x0a8
150 #define SDRC_MCFG_1 0x0B0
151 #define SDRC_MR_1 0x0B4
152 #define SDRC_EMR2_1 0x0BC
153 #define SDRC_ACTIM_CTRL_A_1 0x0C4
154 #define SDRC_ACTIM_CTRL_B_1 0x0C8
155 #define SDRC_RFR_CTRL_1 0x0D4
156 #define SDRC_MANUAL_1 0x0D8
157
158 #define SDRC_POWER_AUTOCOUNT_SHIFT 8
159 #define SDRC_POWER_AUTOCOUNT_MASK (0xffff << SDRC_POWER_AUTOCOUNT_SHIFT)
160 #define SDRC_POWER_CLKCTRL_SHIFT 4
161 #define SDRC_POWER_CLKCTRL_MASK (0x3 << SDRC_POWER_CLKCTRL_SHIFT)
162 #define SDRC_SELF_REFRESH_ON_AUTOCOUNT (0x2 << SDRC_POWER_CLKCTRL_SHIFT)
163
164 /*
165 * These values represent the number of memory clock cycles between
166 * autorefresh initiation. They assume 1 refresh per 64 ms (JEDEC), 8192
167 * rows per device, and include a subtraction of a 50 cycle window in the
168 * event that the autorefresh command is delayed due to other SDRC activity.
169 * The '| 1' sets the ARE field to send one autorefresh when the autorefresh
170 * counter reaches 0.
171 *
172 * These represent optimal values for common parts, it won't work for all.
173 * As long as you scale down, most parameters are still work, they just
174 * become sub-optimal. The RFR value goes in the opposite direction. If you
175 * don't adjust it down as your clock period increases the refresh interval
176 * will not be met. Setting all parameters for complete worst case may work,
177 * but may cut memory performance by 2x. Due to errata the DLLs need to be
178 * unlocked and their value needs run time calibration. A dynamic call is
179 * need for that as no single right value exists acorss production samples.
180 *
181 * Only the FULL speed values are given. Current code is such that rate
182 * changes must be made at DPLLoutx2. The actual value adjustment for low
183 * frequency operation will be handled by omap_set_performance()
184 *
185 * By having the boot loader boot up in the fastest L4 speed available likely
186 * will result in something which you can switch between.
187 */
188 #define SDRC_RFR_CTRL_165MHz (0x00044c00 | 1)
189 #define SDRC_RFR_CTRL_133MHz (0x0003de00 | 1)
190 #define SDRC_RFR_CTRL_100MHz (0x0002da01 | 1)
191 #define SDRC_RFR_CTRL_110MHz (0x0002da01 | 1) /* Need to calc */
192 #define SDRC_RFR_CTRL_BYPASS (0x00005000 | 1) /* Need to calc */
193
194
195 /*
196 * SMS register access
197 */
198
199 #define OMAP242X_SMS_REGADDR(reg) \
200 (void __iomem *)OMAP2_L3_IO_ADDRESS(OMAP2420_SMS_BASE + reg)
201 #define OMAP243X_SMS_REGADDR(reg) \
202 (void __iomem *)OMAP2_L3_IO_ADDRESS(OMAP243X_SMS_BASE + reg)
203 #define OMAP343X_SMS_REGADDR(reg) \
204 (void __iomem *)OMAP2_L3_IO_ADDRESS(OMAP343X_SMS_BASE + reg)
205
206 /* SMS register offsets - read/write with sms_{read,write}_reg() */
207
208 #define SMS_SYSCONFIG 0x010
209 /* REVISIT: fill in other SMS registers here */
210
211
212
213 #endif
214