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gerrit-public.fairphone.software / kernel / msm-4.9 / 5f30fc94ca985974fd54de454c7a6070388443db / . / include / linux / platform_data / emif_plat.h
blob: 5c19a2a647c4f5a92f28c3dadedcba3920034555 [file] [log] [blame]
Aneesh V7ec94452012-04-27 17:54:05 +0530[diff] [blame]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
Nishanth Menonf91a5952013-03-16 11:46:44 +0530[diff] [blame]43#define EMIF_CUSTOM_CONFIG_EXTENDED_TEMP_PART 0x00000004
Aneesh V7ec94452012-04-27 17:54:05 +0530[diff] [blame]44
45#ifndef __ASSEMBLY__
46/**
47 * struct ddr_device_info - All information about the DDR device except AC
48 * timing parameters
49 * @type: Device type (LPDDR2-S4, LPDDR2-S2 etc)
50 * @density: Device density
51 * @io_width: Bus width
52 * @cs1_used: Whether there is a DDR device attached to the second
53 * chip-select(CS1) of this EMIF instance
54 * @cal_resistors_per_cs: Whether there is one calibration resistor per
55 * chip-select or whether it's a single one for both
56 * @manufacturer: Manufacturer name string
57 */
58struct ddr_device_info {
59 u32 type;
60 u32 density;
61 u32 io_width;
62 u32 cs1_used;
63 u32 cal_resistors_per_cs;
64 char manufacturer[10];
65};
66
67/**
68 * struct emif_custom_configs - Custom configuration parameters/policies
69 * passed from the platform layer
70 * @mask: Mask to indicate which configs are requested
71 * @lpmode: LPMODE to be used in PWR_MGMT_CTRL register
72 * @lpmode_timeout_performance: Timeout before LPMODE entry when higher
73 * performance is desired at the cost of power (typically
74 * at higher OPPs)
75 * @lpmode_timeout_power: Timeout before LPMODE entry when better power
76 * savings is desired and performance is not important
77 * (typically at lower loads indicated by lower OPPs)
78 * @lpmode_freq_threshold: The DDR frequency threshold to identify between
79 * the above two cases:
80 * timeout = (freq >= lpmode_freq_threshold) ?
81 * lpmode_timeout_performance :
82 * lpmode_timeout_power;
83 * @temp_alert_poll_interval_ms: LPDDR2 MR4 polling interval at nominal
84 * temperature(in milliseconds). When temperature is high
85 * polling is done 4 times as frequently.
86 */
87struct emif_custom_configs {
88 u32 mask;
89 u32 lpmode;
90 u32 lpmode_timeout_performance;
91 u32 lpmode_timeout_power;
92 u32 lpmode_freq_threshold;
93 u32 temp_alert_poll_interval_ms;
94};
95
96/**
97 * struct emif_platform_data - Platform data passed on EMIF platform
98 * device creation. Used by the driver.
99 * @hw_caps: Hw capabilities of the EMIF IP in the respective SoC
100 * @device_info: Device info structure containing information such
101 * as type, bus width, density etc
102 * @timings: Timings information from device datasheet passed
103 * as an array of 'struct lpddr2_timings'. Can be NULL
104 * if if default timings are ok
105 * @timings_arr_size: Size of the timings array. Depends on the number
106 * of different frequencies for which timings data
107 * is provided
108 * @min_tck: Minimum value of some timing parameters in terms
109 * of number of cycles. Can be NULL if default values
110 * are ok
111 * @custom_configs: Custom configurations requested by SoC or board
112 * code and the data for them. Can be NULL if default
113 * configurations done by the driver are ok. See
114 * documentation for 'struct emif_custom_configs' for
115 * more details
116 */
117struct emif_platform_data {
118 u32 hw_caps;
119 struct ddr_device_info *device_info;
120 const struct lpddr2_timings *timings;
121 u32 timings_arr_size;
122 const struct lpddr2_min_tck *min_tck;
123 struct emif_custom_configs *custom_configs;
124 u32 ip_rev;
125 u32 phy_type;
126};
127#endif /* __ASSEMBLY__ */
128
129#endif /* __LINUX_EMIF_H */