[media] adp1653: Add driver for LED flash controller
[linux-2.6.git] / include / media / adp1653.h
1 /*
2  * include/media/adp1653.h
3  *
4  * Copyright (C) 2008--2011 Nokia Corporation
5  *
6  * Contact: Sakari Ailus <sakari.ailus@maxwell.research.nokia.com>
7  *
8  * Contributors:
9  *      Sakari Ailus <sakari.ailus@maxwell.research.nokia.com>
10  *      Tuukka Toivonen <tuukkat76@gmail.com>
11  *
12  * This program is free software; you can redistribute it and/or
13  * modify it under the terms of the GNU General Public License
14  * version 2 as published by the Free Software Foundation.
15  *
16  * This program is distributed in the hope that it will be useful, but
17  * WITHOUT ANY WARRANTY; without even the implied warranty of
18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
19  * General Public License for more details.
20  *
21  * You should have received a copy of the GNU General Public License
22  * along with this program; if not, write to the Free Software
23  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
24  * 02110-1301 USA
25  *
26  */
27
28 #ifndef ADP1653_H
29 #define ADP1653_H
30
31 #include <linux/i2c.h>
32 #include <linux/mutex.h>
33 #include <linux/videodev2.h>
34 #include <media/v4l2-ctrls.h>
35 #include <media/v4l2-subdev.h>
36
37 #define ADP1653_NAME                            "adp1653"
38 #define ADP1653_I2C_ADDR                        (0x60 >> 1)
39
40 /* Register definitions */
41 #define ADP1653_REG_OUT_SEL                     0x00
42 #define ADP1653_REG_OUT_SEL_HPLED_TORCH_MIN     0x01
43 #define ADP1653_REG_OUT_SEL_HPLED_TORCH_MAX     0x0b
44 #define ADP1653_REG_OUT_SEL_HPLED_FLASH_MIN     0x0c
45 #define ADP1653_REG_OUT_SEL_HPLED_FLASH_MAX     0x1f
46 #define ADP1653_REG_OUT_SEL_HPLED_SHIFT         3
47 #define ADP1653_REG_OUT_SEL_ILED_MAX            0x07
48 #define ADP1653_REG_OUT_SEL_ILED_SHIFT          0
49
50 #define ADP1653_REG_CONFIG                      0x01
51 #define ADP1653_REG_CONFIG_TMR_CFG              (1 << 4)
52 #define ADP1653_REG_CONFIG_TMR_SET_MAX          0x0f
53 #define ADP1653_REG_CONFIG_TMR_SET_SHIFT        0
54
55 #define ADP1653_REG_SW_STROBE                   0x02
56 #define ADP1653_REG_SW_STROBE_SW_STROBE         (1 << 0)
57
58 #define ADP1653_REG_FAULT                       0x03
59 #define ADP1653_REG_FAULT_FLT_SCP               (1 << 3)
60 #define ADP1653_REG_FAULT_FLT_OT                (1 << 2)
61 #define ADP1653_REG_FAULT_FLT_TMR               (1 << 1)
62 #define ADP1653_REG_FAULT_FLT_OV                (1 << 0)
63
64 #define ADP1653_INDICATOR_INTENSITY_MIN         0
65 #define ADP1653_INDICATOR_INTENSITY_STEP        2500
66 #define ADP1653_INDICATOR_INTENSITY_MAX         \
67         (ADP1653_REG_OUT_SEL_ILED_MAX * ADP1653_INDICATOR_INTENSITY_STEP)
68 #define ADP1653_INDICATOR_INTENSITY_uA_TO_REG(a) \
69         ((a) / ADP1653_INDICATOR_INTENSITY_STEP)
70 #define ADP1653_INDICATOR_INTENSITY_REG_TO_uA(a) \
71         ((a) * ADP1653_INDICATOR_INTENSITY_STEP)
72
73 #define ADP1653_FLASH_INTENSITY_BASE            35
74 #define ADP1653_FLASH_INTENSITY_STEP            15
75 #define ADP1653_FLASH_INTENSITY_MIN                                     \
76         (ADP1653_FLASH_INTENSITY_BASE                                   \
77          + ADP1653_REG_OUT_SEL_HPLED_FLASH_MIN * ADP1653_FLASH_INTENSITY_STEP)
78 #define ADP1653_FLASH_INTENSITY_MAX                     \
79         (ADP1653_FLASH_INTENSITY_MIN +                  \
80          (ADP1653_REG_OUT_SEL_HPLED_FLASH_MAX -         \
81           ADP1653_REG_OUT_SEL_HPLED_FLASH_MIN + 1) *    \
82          ADP1653_FLASH_INTENSITY_STEP)
83
84 #define ADP1653_FLASH_INTENSITY_mA_TO_REG(a)                            \
85         ((a) < ADP1653_FLASH_INTENSITY_BASE ? 0 :                       \
86          (((a) - ADP1653_FLASH_INTENSITY_BASE) / ADP1653_FLASH_INTENSITY_STEP))
87 #define ADP1653_FLASH_INTENSITY_REG_TO_mA(a)            \
88         ((a) * ADP1653_FLASH_INTENSITY_STEP + ADP1653_FLASH_INTENSITY_BASE)
89
90 #define ADP1653_TORCH_INTENSITY_MIN                                     \
91         (ADP1653_FLASH_INTENSITY_BASE                                   \
92          + ADP1653_REG_OUT_SEL_HPLED_TORCH_MIN * ADP1653_FLASH_INTENSITY_STEP)
93 #define ADP1653_TORCH_INTENSITY_MAX                     \
94         (ADP1653_TORCH_INTENSITY_MIN +                  \
95          (ADP1653_REG_OUT_SEL_HPLED_TORCH_MAX -         \
96           ADP1653_REG_OUT_SEL_HPLED_TORCH_MIN + 1) *    \
97          ADP1653_FLASH_INTENSITY_STEP)
98
99 struct adp1653_platform_data {
100         int (*power)(struct v4l2_subdev *sd, int on);
101
102         u32 max_flash_timeout;          /* flash light timeout in us */
103         u32 max_flash_intensity;        /* led intensity, flash mode */
104         u32 max_torch_intensity;        /* led intensity, torch mode */
105         u32 max_indicator_intensity;    /* indicator led intensity */
106 };
107
108 #define to_adp1653_flash(sd)    container_of(sd, struct adp1653_flash, subdev)
109
110 struct adp1653_flash {
111         struct v4l2_subdev subdev;
112         struct adp1653_platform_data *platform_data;
113
114         struct v4l2_ctrl_handler ctrls;
115         struct v4l2_ctrl *led_mode;
116         struct v4l2_ctrl *flash_timeout;
117         struct v4l2_ctrl *flash_intensity;
118         struct v4l2_ctrl *torch_intensity;
119         struct v4l2_ctrl *indicator_intensity;
120
121         struct mutex power_lock;
122         int power_count;
123         int fault;
124 };
125
126 #endif /* ADP1653_H */