• Home
  • Line#
  • Scopes#
  • Navigate#
  • Raw
  • Download
1 /*
2  * OMAP3/4 Voltage Processor (VP) structure and macro definitions
3  *
4  * Copyright (C) 2007, 2010 Texas Instruments, Inc.
5  * Rajendra Nayak <rnayak@ti.com>
6  * Lesly A M <x0080970@ti.com>
7  * Thara Gopinath <thara@ti.com>
8  *
9  * Copyright (C) 2008, 2011 Nokia Corporation
10  * Kalle Jokiniemi
11  * Paul Walmsley
12  *
13  * This program is free software; you can redistribute it and/or
14  * modify it under the terms of the GNU General Public License version
15  * 2 as published by the Free Software Foundation.
16  */
17 #ifndef __ARCH_ARM_MACH_OMAP2_VP_H
18 #define __ARCH_ARM_MACH_OMAP2_VP_H
19 
20 #include <linux/kernel.h>
21 
22 struct voltagedomain;
23 
24 /* XXX document */
25 #define VP_IDLE_TIMEOUT		200
26 #define VP_TRANXDONE_TIMEOUT	300
27 
28 /**
29  * struct omap_vp_ops - per-VP operations
30  * @check_txdone: check for VP transaction done
31  * @clear_txdone: clear VP transaction done status
32  */
33 struct omap_vp_ops {
34 	u32 (*check_txdone)(u8 vp_id);
35 	void (*clear_txdone)(u8 vp_id);
36 };
37 
38 /**
39  * struct omap_vp_common - register data common to all VDDs
40  * @vpconfig_erroroffset_mask: ERROROFFSET bitmask in the PRM_VP*_CONFIG reg
41  * @vpconfig_errorgain_mask: ERRORGAIN bitmask in the PRM_VP*_CONFIG reg
42  * @vpconfig_initvoltage_mask: INITVOLTAGE bitmask in the PRM_VP*_CONFIG reg
43  * @vpconfig_timeouten: TIMEOUT bitmask in the PRM_VP*_CONFIG reg
44  * @vpconfig_initvdd: INITVDD bitmask in the PRM_VP*_CONFIG reg
45  * @vpconfig_forceupdate: FORCEUPDATE bitmask in the PRM_VP*_CONFIG reg
46  * @vpconfig_vpenable: VPENABLE bitmask in the PRM_VP*_CONFIG reg
47  * @vpconfig_erroroffset_shift: ERROROFFSET field shift in PRM_VP*_CONFIG reg
48  * @vpconfig_errorgain_shift: ERRORGAIN field shift in PRM_VP*_CONFIG reg
49  * @vpconfig_initvoltage_shift: INITVOLTAGE field shift in PRM_VP*_CONFIG reg
50  * @vstepmin_stepmin_shift: VSTEPMIN field shift in the PRM_VP*_VSTEPMIN reg
51  * @vstepmin_smpswaittimemin_shift: SMPSWAITTIMEMIN field shift in PRM_VP*_VSTEPMIN reg
52  * @vstepmax_stepmax_shift: VSTEPMAX field shift in the PRM_VP*_VSTEPMAX reg
53  * @vstepmax_smpswaittimemax_shift: SMPSWAITTIMEMAX field shift in PRM_VP*_VSTEPMAX reg
54  * @vlimitto_vddmin_shift: VDDMIN field shift in PRM_VP*_VLIMITTO reg
55  * @vlimitto_vddmax_shift: VDDMAX field shift in PRM_VP*_VLIMITTO reg
56  * @vlimitto_timeout_shift: TIMEOUT field shift in PRM_VP*_VLIMITTO reg
57  * @vpvoltage_mask: VPVOLTAGE field mask in PRM_VP*_VOLTAGE reg
58  */
59 struct omap_vp_common {
60 	u32 vpconfig_erroroffset_mask;
61 	u32 vpconfig_errorgain_mask;
62 	u32 vpconfig_initvoltage_mask;
63 	u8 vpconfig_timeouten;
64 	u8 vpconfig_initvdd;
65 	u8 vpconfig_forceupdate;
66 	u8 vpconfig_vpenable;
67 	u8 vstepmin_stepmin_shift;
68 	u8 vstepmin_smpswaittimemin_shift;
69 	u8 vstepmax_stepmax_shift;
70 	u8 vstepmax_smpswaittimemax_shift;
71 	u8 vlimitto_vddmin_shift;
72 	u8 vlimitto_vddmax_shift;
73 	u8 vlimitto_timeout_shift;
74 	u8 vpvoltage_mask;
75 
76 	const struct omap_vp_ops *ops;
77 };
78 
79 /**
80  * struct omap_vp_instance - VP register offsets (per-VDD)
81  * @common: pointer to struct omap_vp_common * for this SoC
82  * @vpconfig: PRM_VP*_CONFIG reg offset from PRM start
83  * @vstepmin: PRM_VP*_VSTEPMIN reg offset from PRM start
84  * @vlimitto: PRM_VP*_VLIMITTO reg offset from PRM start
85  * @vstatus: PRM_VP*_VSTATUS reg offset from PRM start
86  * @voltage: PRM_VP*_VOLTAGE reg offset from PRM start
87  * @id: Unique identifier for VP instance.
88  * @enabled: flag to keep track of whether vp is enabled or not
89  *
90  * XXX vp_common is probably not needed since it is per-SoC
91  */
92 struct omap_vp_instance {
93 	const struct omap_vp_common *common;
94 	u8 vpconfig;
95 	u8 vstepmin;
96 	u8 vstepmax;
97 	u8 vlimitto;
98 	u8 vstatus;
99 	u8 voltage;
100 	u8 id;
101 	bool enabled;
102 };
103 
104 extern struct omap_vp_instance omap3_vp_mpu;
105 extern struct omap_vp_instance omap3_vp_core;
106 
107 extern struct omap_vp_instance omap4_vp_mpu;
108 extern struct omap_vp_instance omap4_vp_iva;
109 extern struct omap_vp_instance omap4_vp_core;
110 
111 extern struct omap_vp_param omap3_mpu_vp_data;
112 extern struct omap_vp_param omap3_core_vp_data;
113 
114 extern struct omap_vp_param omap4_mpu_vp_data;
115 extern struct omap_vp_param omap4_iva_vp_data;
116 extern struct omap_vp_param omap4_core_vp_data;
117 
118 void omap_vp_init(struct voltagedomain *voltdm);
119 void omap_vp_enable(struct voltagedomain *voltdm);
120 void omap_vp_disable(struct voltagedomain *voltdm);
121 int omap_vp_forceupdate_scale(struct voltagedomain *voltdm,
122 			      unsigned long target_volt);
123 int omap_vp_update_errorgain(struct voltagedomain *voltdm,
124 			     unsigned long target_volt);
125 
126 #endif
127