| /* |
| * 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 */ |
