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/include/linux/nsc_gpio.h

https://bitbucket.org/thekraven/iscream_thunderc-2.6.35
C++ Header | 40 lines | 15 code | 5 blank | 20 comment | 0 complexity | 973c1cf435713376a64e31ef01036828 MD5 | raw file
Possible License(s): GPL-2.0, LGPL-2.0, AGPL-1.0
 1/**
 2   nsc_gpio.c
 3
 4   National Semiconductor GPIO common access methods.
 5
 6   struct nsc_gpio_ops abstracts the low-level access
 7   operations for the GPIO units on 2 NSC chip families; the GEODE
 8   integrated CPU, and the PC-8736[03456] integrated PC-peripheral
 9   chips.
10
11   The GPIO units on these chips have the same pin architecture, but
12   the access methods differ.  Thus, scx200_gpio and pc8736x_gpio
13   implement their own versions of these routines; and use the common
14   file-operations routines implemented in nsc_gpio module.
15
16   Copyright (c) 2005 Jim Cromie <jim.cromie@gmail.com>
17
18   NB: this work was tested on the Geode SC-1100 and PC-87366 chips.
19   NSC sold the GEODE line to AMD, and the PC-8736x line to Winbond.
20*/
21
22struct nsc_gpio_ops {
23	struct module*	owner;
24	u32	(*gpio_config)	(unsigned iminor, u32 mask, u32 bits);
25	void	(*gpio_dump)	(struct nsc_gpio_ops *amp, unsigned iminor);
26	int	(*gpio_get)	(unsigned iminor);
27	void	(*gpio_set)	(unsigned iminor, int state);
28	void	(*gpio_change)	(unsigned iminor);
29	int	(*gpio_current)	(unsigned iminor);
30	struct device*	dev;	/* for dev_dbg() support, set in init  */
31};
32
33extern ssize_t nsc_gpio_write(struct file *file, const char __user *data,
34			      size_t len, loff_t *ppos);
35
36extern ssize_t nsc_gpio_read(struct file *file, char __user *buf,
37			     size_t len, loff_t *ppos);
38
39extern void nsc_gpio_dump(struct nsc_gpio_ops *amp, unsigned index);
40