| 12345678910111213141516171819202122232425262728293031323334353637383940 |
- /**
- nsc_gpio.c
- National Semiconductor GPIO common access methods.
- struct nsc_gpio_ops abstracts the low-level access
- operations for the GPIO units on 2 NSC chip families; the GEODE
- integrated CPU, and the PC-8736[03456] integrated PC-peripheral
- chips.
- The GPIO units on these chips have the same pin architecture, but
- the access methods differ. Thus, scx200_gpio and pc8736x_gpio
- implement their own versions of these routines; and use the common
- file-operations routines implemented in nsc_gpio module.
- Copyright (c) 2005 Jim Cromie <jim.cromie@gmail.com>
- NB: this work was tested on the Geode SC-1100 and PC-87366 chips.
- NSC sold the GEODE line to AMD, and the PC-8736x line to Winbond.
- */
- struct nsc_gpio_ops {
- struct module* owner;
- u32 (*gpio_config) (unsigned iminor, u32 mask, u32 bits);
- void (*gpio_dump) (struct nsc_gpio_ops *amp, unsigned iminor);
- int (*gpio_get) (unsigned iminor);
- void (*gpio_set) (unsigned iminor, int state);
- void (*gpio_change) (unsigned iminor);
- int (*gpio_current) (unsigned iminor);
- struct device* dev; /* for dev_dbg() support, set in init */
- };
- extern ssize_t nsc_gpio_write(struct file *file, const char __user *data,
- size_t len, loff_t *ppos);
- extern ssize_t nsc_gpio_read(struct file *file, char __user *buf,
- size_t len, loff_t *ppos);
- extern void nsc_gpio_dump(struct nsc_gpio_ops *amp, unsigned index);
|
