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 32 static inline void sdrc_write_reg(u32 val, u16 reg) 33 { 34 writel_relaxed(val, OMAP_SDRC_REGADDR(reg)); 35 } 36 37 static inline u32 sdrc_read_reg(u16 reg) 38 { 39 return readl_relaxed(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 writel_relaxed(val, OMAP_SMS_REGADDR(reg)); 47 } 48 49 static inline u32 sms_read_reg(u16 reg) 50 { 51 return readl_relaxed(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 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 across 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