1 /* 2 * Definitions for TI EMIF device platform data 3 * 4 * Copyright (C) 2012 Texas Instruments, Inc. 5 * 6 * Aneesh V <aneesh@ti.com> 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License version 2 as 10 * published by the Free Software Foundation. 11 */ 12 #ifndef __EMIF_PLAT_H 13 #define __EMIF_PLAT_H 14 15 /* Low power modes - EMIF_PWR_MGMT_CTRL */ 16 #define EMIF_LP_MODE_DISABLE 0 17 #define EMIF_LP_MODE_CLOCK_STOP 1 18 #define EMIF_LP_MODE_SELF_REFRESH 2 19 #define EMIF_LP_MODE_PWR_DN 4 20 21 /* Hardware capabilities */ 22 #define EMIF_HW_CAPS_LL_INTERFACE 0x00000001 23 24 /* 25 * EMIF IP Revisions 26 * EMIF4D - Used in OMAP4 27 * EMIF4D5 - Used in OMAP5 28 */ 29 #define EMIF_4D 1 30 #define EMIF_4D5 2 31 32 /* 33 * PHY types 34 * ATTILAPHY - Used in OMAP4 35 * INTELLIPHY - Used in OMAP5 36 */ 37 #define EMIF_PHY_TYPE_ATTILAPHY 1 38 #define EMIF_PHY_TYPE_INTELLIPHY 2 39 40 /* Custom config requests */ 41 #define EMIF_CUSTOM_CONFIG_LPMODE 0x00000001 42 #define EMIF_CUSTOM_CONFIG_TEMP_ALERT_POLL_INTERVAL 0x00000002 43 44 #ifndef __ASSEMBLY__ 45 /** 46 * struct ddr_device_info - All information about the DDR device except AC 47 * timing parameters 48 * @type: Device type (LPDDR2-S4, LPDDR2-S2 etc) 49 * @density: Device density 50 * @io_width: Bus width 51 * @cs1_used: Whether there is a DDR device attached to the second 52 * chip-select(CS1) of this EMIF instance 53 * @cal_resistors_per_cs: Whether there is one calibration resistor per 54 * chip-select or whether it's a single one for both 55 * @manufacturer: Manufacturer name string 56 */ 57 struct ddr_device_info { 58 u32 type; 59 u32 density; 60 u32 io_width; 61 u32 cs1_used; 62 u32 cal_resistors_per_cs; 63 char manufacturer[10]; 64 }; 65 66 /** 67 * struct emif_custom_configs - Custom configuration parameters/policies 68 * passed from the platform layer 69 * @mask: Mask to indicate which configs are requested 70 * @lpmode: LPMODE to be used in PWR_MGMT_CTRL register 71 * @lpmode_timeout_performance: Timeout before LPMODE entry when higher 72 * performance is desired at the cost of power (typically 73 * at higher OPPs) 74 * @lpmode_timeout_power: Timeout before LPMODE entry when better power 75 * savings is desired and performance is not important 76 * (typically at lower loads indicated by lower OPPs) 77 * @lpmode_freq_threshold: The DDR frequency threshold to identify between 78 * the above two cases: 79 * timeout = (freq >= lpmode_freq_threshold) ? 80 * lpmode_timeout_performance : 81 * lpmode_timeout_power; 82 * @temp_alert_poll_interval_ms: LPDDR2 MR4 polling interval at nominal 83 * temperature(in milliseconds). When temperature is high 84 * polling is done 4 times as frequently. 85 */ 86 struct emif_custom_configs { 87 u32 mask; 88 u32 lpmode; 89 u32 lpmode_timeout_performance; 90 u32 lpmode_timeout_power; 91 u32 lpmode_freq_threshold; 92 u32 temp_alert_poll_interval_ms; 93 }; 94 95 /** 96 * struct emif_platform_data - Platform data passed on EMIF platform 97 * device creation. Used by the driver. 98 * @hw_caps: Hw capabilities of the EMIF IP in the respective SoC 99 * @device_info: Device info structure containing information such 100 * as type, bus width, density etc 101 * @timings: Timings information from device datasheet passed 102 * as an array of 'struct lpddr2_timings'. Can be NULL 103 * if if default timings are ok 104 * @timings_arr_size: Size of the timings array. Depends on the number 105 * of different frequencies for which timings data 106 * is provided 107 * @min_tck: Minimum value of some timing parameters in terms 108 * of number of cycles. Can be NULL if default values 109 * are ok 110 * @custom_configs: Custom configurations requested by SoC or board 111 * code and the data for them. Can be NULL if default 112 * configurations done by the driver are ok. See 113 * documentation for 'struct emif_custom_configs' for 114 * more details 115 */ 116 struct emif_platform_data { 117 u32 hw_caps; 118 struct ddr_device_info *device_info; 119 const struct lpddr2_timings *timings; 120 u32 timings_arr_size; 121 const struct lpddr2_min_tck *min_tck; 122 struct emif_custom_configs *custom_configs; 123 u32 ip_rev; 124 u32 phy_type; 125 }; 126 #endif /* __ASSEMBLY__ */ 127 128 #endif /* __LINUX_EMIF_H */ 129