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0001 /* SPDX-License-Identifier: GPL-2.0-only */ 0002 /* 0003 * Definitions for TI EMIF device platform data 0004 * 0005 * Copyright (C) 2012 Texas Instruments, Inc. 0006 * 0007 * Aneesh V <aneesh@ti.com> 0008 */ 0009 #ifndef __EMIF_PLAT_H 0010 #define __EMIF_PLAT_H 0011 0012 /* Low power modes - EMIF_PWR_MGMT_CTRL */ 0013 #define EMIF_LP_MODE_DISABLE 0 0014 #define EMIF_LP_MODE_CLOCK_STOP 1 0015 #define EMIF_LP_MODE_SELF_REFRESH 2 0016 #define EMIF_LP_MODE_PWR_DN 4 0017 0018 /* Hardware capabilities */ 0019 #define EMIF_HW_CAPS_LL_INTERFACE 0x00000001 0020 0021 /* 0022 * EMIF IP Revisions 0023 * EMIF4D - Used in OMAP4 0024 * EMIF4D5 - Used in OMAP5 0025 */ 0026 #define EMIF_4D 1 0027 #define EMIF_4D5 2 0028 0029 /* 0030 * PHY types 0031 * ATTILAPHY - Used in OMAP4 0032 * INTELLIPHY - Used in OMAP5 0033 */ 0034 #define EMIF_PHY_TYPE_ATTILAPHY 1 0035 #define EMIF_PHY_TYPE_INTELLIPHY 2 0036 0037 /* Custom config requests */ 0038 #define EMIF_CUSTOM_CONFIG_LPMODE 0x00000001 0039 #define EMIF_CUSTOM_CONFIG_TEMP_ALERT_POLL_INTERVAL 0x00000002 0040 #define EMIF_CUSTOM_CONFIG_EXTENDED_TEMP_PART 0x00000004 0041 0042 #ifndef __ASSEMBLY__ 0043 /** 0044 * struct ddr_device_info - All information about the DDR device except AC 0045 * timing parameters 0046 * @type: Device type (LPDDR2-S4, LPDDR2-S2 etc) 0047 * @density: Device density 0048 * @io_width: Bus width 0049 * @cs1_used: Whether there is a DDR device attached to the second 0050 * chip-select(CS1) of this EMIF instance 0051 * @cal_resistors_per_cs: Whether there is one calibration resistor per 0052 * chip-select or whether it's a single one for both 0053 * @manufacturer: Manufacturer name string 0054 */ 0055 struct ddr_device_info { 0056 u32 type; 0057 u32 density; 0058 u32 io_width; 0059 u32 cs1_used; 0060 u32 cal_resistors_per_cs; 0061 char manufacturer[10]; 0062 }; 0063 0064 /** 0065 * struct emif_custom_configs - Custom configuration parameters/policies 0066 * passed from the platform layer 0067 * @mask: Mask to indicate which configs are requested 0068 * @lpmode: LPMODE to be used in PWR_MGMT_CTRL register 0069 * @lpmode_timeout_performance: Timeout before LPMODE entry when higher 0070 * performance is desired at the cost of power (typically 0071 * at higher OPPs) 0072 * @lpmode_timeout_power: Timeout before LPMODE entry when better power 0073 * savings is desired and performance is not important 0074 * (typically at lower loads indicated by lower OPPs) 0075 * @lpmode_freq_threshold: The DDR frequency threshold to identify between 0076 * the above two cases: 0077 * timeout = (freq >= lpmode_freq_threshold) ? 0078 * lpmode_timeout_performance : 0079 * lpmode_timeout_power; 0080 * @temp_alert_poll_interval_ms: LPDDR2 MR4 polling interval at nominal 0081 * temperature(in milliseconds). When temperature is high 0082 * polling is done 4 times as frequently. 0083 */ 0084 struct emif_custom_configs { 0085 u32 mask; 0086 u32 lpmode; 0087 u32 lpmode_timeout_performance; 0088 u32 lpmode_timeout_power; 0089 u32 lpmode_freq_threshold; 0090 u32 temp_alert_poll_interval_ms; 0091 }; 0092 0093 /** 0094 * struct emif_platform_data - Platform data passed on EMIF platform 0095 * device creation. Used by the driver. 0096 * @hw_caps: Hw capabilities of the EMIF IP in the respective SoC 0097 * @device_info: Device info structure containing information such 0098 * as type, bus width, density etc 0099 * @timings: Timings information from device datasheet passed 0100 * as an array of 'struct lpddr2_timings'. Can be NULL 0101 * if if default timings are ok 0102 * @timings_arr_size: Size of the timings array. Depends on the number 0103 * of different frequencies for which timings data 0104 * is provided 0105 * @min_tck: Minimum value of some timing parameters in terms 0106 * of number of cycles. Can be NULL if default values 0107 * are ok 0108 * @custom_configs: Custom configurations requested by SoC or board 0109 * code and the data for them. Can be NULL if default 0110 * configurations done by the driver are ok. See 0111 * documentation for 'struct emif_custom_configs' for 0112 * more details 0113 */ 0114 struct emif_platform_data { 0115 u32 hw_caps; 0116 struct ddr_device_info *device_info; 0117 const struct lpddr2_timings *timings; 0118 u32 timings_arr_size; 0119 const struct lpddr2_min_tck *min_tck; 0120 struct emif_custom_configs *custom_configs; 0121 u32 ip_rev; 0122 u32 phy_type; 0123 }; 0124 #endif /* __ASSEMBLY__ */ 0125 0126 #endif /* __LINUX_EMIF_H */
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