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TOMOYO Linux Cross Reference
Linux/include/linux/c2port.h

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  1 /*
  2  *  Silicon Labs C2 port Linux support
  3  *
  4  *  Copyright (c) 2007 Rodolfo Giometti <giometti@linux.it>
  5  *  Copyright (c) 2007 Eurotech S.p.A. <info@eurotech.it>
  6  *
  7  * This program is free software; you can redistribute it and/or modify it
  8  * under the terms of the GNU General Public License version 2 as published by
  9  * the Free Software Foundation
 10  */
 11 
 12 #include <linux/kmemcheck.h>
 13 
 14 #define C2PORT_NAME_LEN                 32
 15 
 16 struct device;
 17 
 18 /*
 19  * C2 port basic structs
 20  */
 21 
 22 /* Main struct */
 23 struct c2port_ops;
 24 struct c2port_device {
 25         kmemcheck_bitfield_begin(flags);
 26         unsigned int access:1;
 27         unsigned int flash_access:1;
 28         kmemcheck_bitfield_end(flags);
 29 
 30         int id;
 31         char name[C2PORT_NAME_LEN];
 32         struct c2port_ops *ops;
 33         struct mutex mutex;             /* prevent races during read/write */
 34 
 35         struct device *dev;
 36 
 37         void *private_data;
 38 };
 39 
 40 /* Basic operations */
 41 struct c2port_ops {
 42         /* Flash layout */
 43         unsigned short block_size;      /* flash block size in bytes */
 44         unsigned short blocks_num;      /* flash blocks number */
 45 
 46         /* Enable or disable the access to C2 port */
 47         void (*access)(struct c2port_device *dev, int status);
 48 
 49         /* Set C2D data line as input/output */
 50         void (*c2d_dir)(struct c2port_device *dev, int dir);
 51 
 52         /* Read/write C2D data line */
 53         int (*c2d_get)(struct c2port_device *dev);
 54         void (*c2d_set)(struct c2port_device *dev, int status);
 55 
 56         /* Write C2CK clock line */
 57         void (*c2ck_set)(struct c2port_device *dev, int status);
 58 };
 59 
 60 /*
 61  * Exported functions
 62  */
 63 
 64 extern struct c2port_device *c2port_device_register(char *name,
 65                                         struct c2port_ops *ops, void *devdata);
 66 extern void c2port_device_unregister(struct c2port_device *dev);
 67 

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