drivers/media/video/ovcamchip/ovcamchip_priv.h

   1 /* OmniVision* camera chip driver private definitions for core code and
   2  * chip-specific code
   3  *
   4  * Copyright (c) 1999-2004 Mark McClelland
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License as published by the
   8  * Free Software Foundation; either version 2 of the License, or (at your
   9  * option) any later version. NO WARRANTY OF ANY KIND is expressed or implied.
  10  *
  11  * * OmniVision is a trademark of OmniVision Technologies, Inc. This driver
  12  * is not sponsored or developed by them.
  13  */
  14
  15 #ifndef __LINUX_OVCAMCHIP_PRIV_H
  16 #define __LINUX_OVCAMCHIP_PRIV_H
  17
  18 #include <linux/i2c.h>
  19 #include <media/ovcamchip.h>
  20
  21 #ifdef DEBUG
  22 extern int ovcamchip_debug;
  23 #endif
  24
  25 #define PDEBUG(level, fmt, args...) \
  26         if (ovcamchip_debug >= (level)) pr_debug("[%s:%d] " fmt "\n", \
  27                 __func__, __LINE__ , ## args)
  28
  29 #define DDEBUG(level, dev, fmt, args...) \
  30         if (ovcamchip_debug >= (level)) dev_dbg(dev, "[%s:%d] " fmt "\n", \
  31                 __func__, __LINE__ , ## args)
  32
  33 /* Number of times to retry chip detection. Increase this if you are getting
  34  * "Failed to init camera chip" */
  35 #define I2C_DETECT_RETRIES      10
  36
  37 struct ovcamchip_regvals {
  38         unsigned char reg;
  39         unsigned char val;
  40 };
  41
  42 struct ovcamchip_ops {
  43         int (*init)(struct i2c_client *);
  44         int (*free)(struct i2c_client *);
  45         int (*command)(struct i2c_client *, unsigned int, void *);
  46 };
  47
  48 struct ovcamchip {
  49         struct ovcamchip_ops *sops;
  50         void *spriv;               /* Private data for OV7x10.c etc... */
  51         int subtype;               /* = SEN_OV7610 etc... */
  52         int mono;                  /* Monochrome chip? (invalid until init) */
  53         int initialized;           /* OVCAMCHIP_CMD_INITIALIZE was successful */
  54 };
  55
  56 /* --------------------------------- */
  57 /*              I2C I/O              */
  58 /* --------------------------------- */
  59
  60 static inline int ov_read(struct i2c_client *c, unsigned char reg,
  61                           unsigned char *value)
  62 {
  63         int rc;
  64
  65         rc = i2c_smbus_read_byte_data(c, reg);
  66         *value = (unsigned char) rc;
  67         return rc;
  68 }
  69
  70 static inline int ov_write(struct i2c_client *c, unsigned char reg,
  71                            unsigned char value )
  72 {
  73         return i2c_smbus_write_byte_data(c, reg, value);
  74 }
  75
  76 /* --------------------------------- */
  77 /*        FUNCTION PROTOTYPES        */
  78 /* --------------------------------- */
  79
  80 /* Functions in ovcamchip_core.c */
  81
  82 extern int ov_write_regvals(struct i2c_client *c,
  83                             struct ovcamchip_regvals *rvals);
  84
  85 extern int ov_write_mask(struct i2c_client *c, unsigned char reg,
  86                          unsigned char value, unsigned char mask);
  87
  88 #endif