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

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  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 
 22 struct 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 
 33 extern ssize_t nsc_gpio_write(struct file *file, const char __user *data,
 34                               size_t len, loff_t *ppos);
 35 
 36 extern ssize_t nsc_gpio_read(struct file *file, char __user *buf,
 37                              size_t len, loff_t *ppos);
 38 
 39 extern void nsc_gpio_dump(struct nsc_gpio_ops *amp, unsigned index);
 40 
 41 

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