| Jim Cromie | fe3a168 | 2006-06-27 02:54:18 -0700 | [diff] [blame^] | 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) (unsigned iminor); |
| 26 | int (*gpio_get) (unsigned iminor); |
| 27 | void (*gpio_set) (unsigned iminor, int state); |
| 28 | void (*gpio_set_high)(unsigned iminor); |
| 29 | void (*gpio_set_low) (unsigned iminor); |
| 30 | void (*gpio_change) (unsigned iminor); |
| 31 | int (*gpio_current) (unsigned iminor); |
| 32 | }; |
| 33 | |