projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 4e17e1db RG |
1 | /* |
| 2 | * Silicon Labs C2 port Linux support | |
| 3 | * | |
| 4 | * Copyright (c) 2007 Rodolfo Giometti <[email protected]> | |
| 5 | * Copyright (c) 2007 Eurotech S.p.A. <[email protected]> | |
| 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/device.h> | |
| 13 | ||
| 14 | #define C2PORT_NAME_LEN 32 | |
| 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 | #define to_class_dev(obj) container_of((obj), struct class_device, kobj) | |
| 61 | #define to_c2port_device(obj) container_of((obj), struct c2port_device, class) | |
| 62 | ||
| 63 | extern struct c2port_device *c2port_device_register(char *name, | |
| 64 | struct c2port_ops *ops, void *devdata); | |
| 65 | extern void c2port_device_unregister(struct c2port_device *dev); |