components/openindiana/drm/drm/sys/drm/drm_sun_i2c.h

   1 /*
   2  * Copyright (c) 2006, 2013, Oracle and/or its affiliates. All rights reserved.
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  21  * DEALINGS IN THE SOFTWARE.
  22  */
  23
  24 /*
  25  * Copyright (c) 2012 Intel Corporation.  All rights reserved.
  26  */
  27
  28 #ifndef __DRM_I2C_H__
  29 #define __DRM_I2C_H__
  30
  31 #include <sys/ksynch.h>
  32 #include <sys/types.h>
  33 #include <sys/errno.h>
  34 #include <sys/cmn_err.h>
  35 #include "drm.h"
  36
  37 struct i2c_adapter;
  38 struct i2c_msg;
  39
  40 struct i2c_algorithm {
  41         int (*master_xfer)(struct i2c_adapter *adap, struct i2c_msg *msgs, int num);
  42         u32 (*functionality) (struct i2c_adapter *);
  43 };
  44
  45 extern struct i2c_algorithm i2c_bit_algo;
  46
  47 struct i2c_adapter {
  48         struct i2c_algorithm *algo;
  49         kmutex_t bus_lock;
  50         clock_t timeout;
  51         int retries;
  52         char name[64];
  53         void *data;
  54         void (*setsda) (void *data, int state);
  55         void (*setscl) (void *data, int state);
  56         int  (*getsda) (void *data);
  57         int  (*getscl) (void *data);
  58         void *algo_data;
  59         clock_t udelay;
  60 };
  61
  62 #define I2C_M_RD                0x01
  63 #define I2C_M_NOSTART           0x02
  64
  65 struct i2c_msg {
  66         u16 addr;
  67         u16 flags;
  68         u16 len;
  69         u8 *buf;
  70 };
  71
  72 extern int i2c_transfer(struct i2c_adapter *adap, struct i2c_msg *msgs, int num);
  73 extern int i2c_bit_add_bus(struct i2c_adapter *adap);
  74
  75 #endif /* __DRM_I2C_H__ */