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gerrit-public.fairphone.software / kernel / msm-4.9 / 1645bf1b51e5788a18cb6af7cfbb221ee17a6e8b / . / include / linux / platform_data / emif_plat.h
blob: 03378ca840619575655f7196acb47d68a6ac9bd6 [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
43
44#ifndef __ASSEMBLY__
45/**
46 * struct ddr_device_info - All information about the DDR device except AC
47 * timing parameters
48 * @type: Device type (LPDDR2-S4, LPDDR2-S2 etc)
49 * @density: Device density
50 * @io_width: Bus width
51 * @cs1_used: Whether there is a DDR device attached to the second
52 * chip-select(CS1) of this EMIF instance
53 * @cal_resistors_per_cs: Whether there is one calibration resistor per
54 * chip-select or whether it's a single one for both
55 * @manufacturer: Manufacturer name string
56 */
57struct ddr_device_info {
58 u32 type;
59 u32 density;
60 u32 io_width;
61 u32 cs1_used;
62 u32 cal_resistors_per_cs;
63 char manufacturer[10];
64};
65
66/**
67 * struct emif_custom_configs - Custom configuration parameters/policies
68 * passed from the platform layer
69 * @mask: Mask to indicate which configs are requested
70 * @lpmode: LPMODE to be used in PWR_MGMT_CTRL register
71 * @lpmode_timeout_performance: Timeout before LPMODE entry when higher
72 * performance is desired at the cost of power (typically
73 * at higher OPPs)
74 * @lpmode_timeout_power: Timeout before LPMODE entry when better power
75 * savings is desired and performance is not important
76 * (typically at lower loads indicated by lower OPPs)
77 * @lpmode_freq_threshold: The DDR frequency threshold to identify between
78 * the above two cases:
79 * timeout = (freq >= lpmode_freq_threshold) ?
80 * lpmode_timeout_performance :
81 * lpmode_timeout_power;
82 * @temp_alert_poll_interval_ms: LPDDR2 MR4 polling interval at nominal
83 * temperature(in milliseconds). When temperature is high
84 * polling is done 4 times as frequently.
85 */
86struct emif_custom_configs {
87 u32 mask;
88 u32 lpmode;
89 u32 lpmode_timeout_performance;
90 u32 lpmode_timeout_power;
91 u32 lpmode_freq_threshold;
92 u32 temp_alert_poll_interval_ms;
93};
94
95/**
96 * struct emif_platform_data - Platform data passed on EMIF platform
97 * device creation. Used by the driver.
98 * @hw_caps: Hw capabilities of the EMIF IP in the respective SoC
99 * @device_info: Device info structure containing information such
100 * as type, bus width, density etc
101 * @timings: Timings information from device datasheet passed
102 * as an array of 'struct lpddr2_timings'. Can be NULL
103 * if if default timings are ok
104 * @timings_arr_size: Size of the timings array. Depends on the number
105 * of different frequencies for which timings data
106 * is provided
107 * @min_tck: Minimum value of some timing parameters in terms
108 * of number of cycles. Can be NULL if default values
109 * are ok
110 * @custom_configs: Custom configurations requested by SoC or board
111 * code and the data for them. Can be NULL if default
112 * configurations done by the driver are ok. See
113 * documentation for 'struct emif_custom_configs' for
114 * more details
115 */
116struct emif_platform_data {
117 u32 hw_caps;
118 struct ddr_device_info *device_info;
119 const struct lpddr2_timings *timings;
120 u32 timings_arr_size;
121 const struct lpddr2_min_tck *min_tck;
122 struct emif_custom_configs *custom_configs;
123 u32 ip_rev;
124 u32 phy_type;
125};
126#endif /* __ASSEMBLY__ */
127
128#endif /* __LINUX_EMIF_H */