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emif_plat.h
/* SPDX-License-Identifier: GPL-2.0-only */ /* * Definitions for TI EMIF device platform data * * Copyright (C) 2012 Texas Instruments, Inc. * * Aneesh V <aneesh@ti.com> */ #ifndef __EMIF_PLAT_H #define __EMIF_PLAT_H /* Low power modes - EMIF_PWR_MGMT_CTRL */ #define EMIF_LP_MODE_DISABLE 0 #define EMIF_LP_MODE_CLOCK_STOP 1 #define EMIF_LP_MODE_SELF_REFRESH 2 #define EMIF_LP_MODE_PWR_DN 4 /* Hardware capabilities */ #define EMIF_HW_CAPS_LL_INTERFACE 0x00000001 /* * EMIF IP Revisions * EMIF4D - Used in OMAP4 * EMIF4D5 - Used in OMAP5 */ #define EMIF_4D 1 #define EMIF_4D5 2 /* * PHY types * ATTILAPHY - Used in OMAP4 * INTELLIPHY - Used in OMAP5 */ #define EMIF_PHY_TYPE_ATTILAPHY 1 #define EMIF_PHY_TYPE_INTELLIPHY 2 /* Custom config requests */ #define EMIF_CUSTOM_CONFIG_LPMODE 0x00000001 #define EMIF_CUSTOM_CONFIG_TEMP_ALERT_POLL_INTERVAL 0x00000002 #define EMIF_CUSTOM_CONFIG_EXTENDED_TEMP_PART 0x00000004 #ifndef __ASSEMBLY__ /** * struct ddr_device_info - All information about the DDR device except AC * timing parameters * @type: Device type (LPDDR2-S4, LPDDR2-S2 etc) * @density: Device density * @io_width: Bus width * @cs1_used: Whether there is a DDR device attached to the second * chip-select(CS1) of this EMIF instance * @cal_resistors_per_cs: Whether there is one calibration resistor per * chip-select or whether it's a single one for both * @manufacturer: Manufacturer name string */ struct ddr_device_info { u32 type; u32 density; u32 io_width; u32 cs1_used; u32 cal_resistors_per_cs; char manufacturer[10]; }; /** * struct emif_custom_configs - Custom configuration parameters/policies * passed from the platform layer * @mask: Mask to indicate which configs are requested * @lpmode: LPMODE to be used in PWR_MGMT_CTRL register * @lpmode_timeout_performance: Timeout before LPMODE entry when higher * performance is desired at the cost of power (typically * at higher OPPs) * @lpmode_timeout_power: Timeout before LPMODE entry when better power * savings is desired and performance is not important * (typically at lower loads indicated by lower OPPs) * @lpmode_freq_threshold: The DDR frequency threshold to identify between * the above two cases: * timeout = (freq >= lpmode_freq_threshold) ? * lpmode_timeout_performance : * lpmode_timeout_power; * @temp_alert_poll_interval_ms: LPDDR2 MR4 polling interval at nominal * temperature(in milliseconds). When temperature is high * polling is done 4 times as frequently. */ struct emif_custom_configs { u32 mask; u32 lpmode; u32 lpmode_timeout_performance; u32 lpmode_timeout_power; u32 lpmode_freq_threshold; u32 temp_alert_poll_interval_ms; }; /** * struct emif_platform_data - Platform data passed on EMIF platform * device creation. Used by the driver. * @hw_caps: Hw capabilities of the EMIF IP in the respective SoC * @device_info: Device info structure containing information such * as type, bus width, density etc * @timings: Timings information from device datasheet passed * as an array of 'struct lpddr2_timings'. Can be NULL * if if default timings are ok * @timings_arr_size: Size of the timings array. Depends on the number * of different frequencies for which timings data * is provided * @min_tck: Minimum value of some timing parameters in terms * of number of cycles. Can be NULL if default values * are ok * @custom_configs: Custom configurations requested by SoC or board * code and the data for them. Can be NULL if default * configurations done by the driver are ok. See * documentation for 'struct emif_custom_configs' for * more details */ struct emif_platform_data { u32 hw_caps; struct ddr_device_info *device_info; const struct lpddr2_timings *timings; u32 timings_arr_size; const struct lpddr2_min_tck *min_tck; struct emif_custom_configs *custom_configs; u32 ip_rev; u32 phy_type; }; #endif /* __ASSEMBLY__ */ #endif /* __LINUX_EMIF_H */
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