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/*

* 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 */