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1 /*
2  * drivers/media/i2c/smiapp/smiapp-quirk.h
3  *
4  * Generic driver for SMIA/SMIA++ compliant camera modules
5  *
6  * Copyright (C) 2011--2012 Nokia Corporation
7  * Contact: Sakari Ailus <sakari.ailus@iki.fi>
8  *
9  * This program is free software; you can redistribute it and/or
10  * modify it under the terms of the GNU General Public License
11  * version 2 as published by the Free Software Foundation.
12  *
13  * This program is distributed in the hope that it will be useful, but
14  * WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
16  * General Public License for more details.
17  *
18  * You should have received a copy of the GNU General Public License
19  * along with this program; if not, write to the Free Software
20  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
21  * 02110-1301 USA
22  *
23  */
24 
25 #ifndef __SMIAPP_QUIRK__
26 #define __SMIAPP_QUIRK__
27 
28 struct smiapp_sensor;
29 
30 /**
31  * struct smiapp_quirk - quirks for sensors that deviate from SMIA++ standard
32  *
33  * @limits: Replace sensor->limits with values which can't be read from
34  *	    sensor registers. Called the first time the sensor is powered up.
35  * @post_poweron: Called always after the sensor has been fully powered on.
36  * @pre_streamon: Called just before streaming is enabled.
37  * @post_streamon: Called right after stopping streaming.
38  * @reg_access: Register access quirk. The quirk may divert the access
39  *		to another register, or no register at all.
40  *
41  *		@write: Is this read (false) or write (true) access?
42  *		@reg: Pointer to the register to access
43  *		@value: Register value, set by the caller on write, or
44  *			by the quirk on read
45  *
46  *		@return: 0 on success, -ENOIOCTLCMD if no register
47  *			 access may be done by the caller (default read
48  *			 value is zero), else negative error code on error
49  */
50 struct smiapp_quirk {
51 	int (*limits)(struct smiapp_sensor *sensor);
52 	int (*post_poweron)(struct smiapp_sensor *sensor);
53 	int (*pre_streamon)(struct smiapp_sensor *sensor);
54 	int (*post_streamoff)(struct smiapp_sensor *sensor);
55 	unsigned long (*pll_flags)(struct smiapp_sensor *sensor);
56 	int (*reg_access)(struct smiapp_sensor *sensor, bool write, u32 *reg,
57 			  u32 *val);
58 	unsigned long flags;
59 };
60 
61 #define SMIAPP_QUIRK_FLAG_8BIT_READ_ONLY			(1 << 0)
62 
63 struct smiapp_reg_8 {
64 	u16 reg;
65 	u8 val;
66 };
67 
68 void smiapp_replace_limit(struct smiapp_sensor *sensor,
69 			  u32 limit, u32 val);
70 
71 #define SMIAPP_MK_QUIRK_REG_8(_reg, _val) \
72 	{				\
73 		.reg = (u16)_reg,	\
74 		.val = _val,		\
75 	}
76 
77 #define smiapp_call_quirk(_sensor, _quirk, ...)				\
78 	(_sensor->minfo.quirk &&					\
79 	 _sensor->minfo.quirk->_quirk ?					\
80 	 _sensor->minfo.quirk->_quirk(_sensor, ##__VA_ARGS__) : 0)
81 
82 #define smiapp_needs_quirk(_sensor, _quirk)		\
83 	(_sensor->minfo.quirk ?				\
84 	 _sensor->minfo.quirk->flags & _quirk : 0)
85 
86 extern const struct smiapp_quirk smiapp_jt8ev1_quirk;
87 extern const struct smiapp_quirk smiapp_imx125es_quirk;
88 extern const struct smiapp_quirk smiapp_jt8ew9_quirk;
89 extern const struct smiapp_quirk smiapp_tcm8500md_quirk;
90 
91 #endif /* __SMIAPP_QUIRK__ */
92