| /* | |
| * Definitions for TI EMIF device platform data | |
| * | |
| * Copyright (C) 2012 Texas Instruments, Inc. | |
| * | |
| * Aneesh V <aneesh@ti.com> | |
| * | |
| * This program is free software; you can redistribute it and/or modify | |
| * it under the terms of the GNU General Public License version 2 as | |
| * published by the Free Software Foundation. | |
| */ | |
| #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 */ |