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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 #define C2PORT_NAME_LEN                 32
 13 
 14 struct device;
 15 
 16 /*
 17  * C2 port basic structs
 18  */
 19 
 20 /* Main struct */
 21 struct c2port_ops;
 22 struct c2port_device {
 23         unsigned int access:1;
 24         unsigned int flash_access:1;
 25 
 26         int id;
 27         char name[C2PORT_NAME_LEN];
 28         struct c2port_ops *ops;
 29         struct mutex mutex;             /* prevent races during read/write */
 30 
 31         struct device *dev;
 32 
 33         void *private_data;
 34 };
 35 
 36 /* Basic operations */
 37 struct c2port_ops {
 38         /* Flash layout */
 39         unsigned short block_size;      /* flash block size in bytes */
 40         unsigned short blocks_num;      /* flash blocks number */
 41 
 42         /* Enable or disable the access to C2 port */
 43         void (*access)(struct c2port_device *dev, int status);
 44 
 45         /* Set C2D data line as input/output */
 46         void (*c2d_dir)(struct c2port_device *dev, int dir);
 47 
 48         /* Read/write C2D data line */
 49         int (*c2d_get)(struct c2port_device *dev);
 50         void (*c2d_set)(struct c2port_device *dev, int status);
 51 
 52         /* Write C2CK clock line */
 53         void (*c2ck_set)(struct c2port_device *dev, int status);
 54 };
 55 
 56 /*
 57  * Exported functions
 58  */
 59 
 60 extern struct c2port_device *c2port_device_register(char *name,
 61                                         struct c2port_ops *ops, void *devdata);
 62 extern void c2port_device_unregister(struct c2port_device *dev);
 63 

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