drivers/gpu/drm/nouveau/nouveau_gpio.h

   1 /*
   2  * Copyright 2011 Red Hat Inc.
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice shall be included in
  12  * all copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  17  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  18  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  19  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  20  * OTHER DEALINGS IN THE SOFTWARE.
  21  */
  22
  23 #ifndef __NOUVEAU_GPIO_H__
  24 #define __NOUVEAU_GPIO_H__
  25
  26 struct gpio_func {
  27         u8 func;
  28         u8 line;
  29         u8 log[2];
  30 };
  31
  32 /* nouveau_gpio.c */
  33 int  nouveau_gpio_create(struct drm_device *);
  34 void nouveau_gpio_destroy(struct drm_device *);
  35 int  nouveau_gpio_init(struct drm_device *);
  36 void nouveau_gpio_fini(struct drm_device *);
  37 void nouveau_gpio_reset(struct drm_device *);
  38 int  nouveau_gpio_drive(struct drm_device *, int idx, int line,
  39                         int dir, int out);
  40 int  nouveau_gpio_sense(struct drm_device *, int idx, int line);
  41 int  nouveau_gpio_find(struct drm_device *, int idx, u8 tag, u8 line,
  42                        struct gpio_func *);
  43 int  nouveau_gpio_set(struct drm_device *, int idx, u8 tag, u8 line, int state);
  44 int  nouveau_gpio_get(struct drm_device *, int idx, u8 tag, u8 line);
  45 int  nouveau_gpio_irq(struct drm_device *, int idx, u8 tag, u8 line, bool on);
  46 void nouveau_gpio_isr(struct drm_device *, int idx, u32 mask);
  47 int  nouveau_gpio_isr_add(struct drm_device *, int idx, u8 tag, u8 line,
  48                           void (*)(void *, int state), void *data);
  49 void nouveau_gpio_isr_del(struct drm_device *, int idx, u8 tag, u8 line,
  50                           void (*)(void *, int state), void *data);
  51
  52 static inline bool
  53 nouveau_gpio_func_valid(struct drm_device *dev, u8 tag)
  54 {
  55         struct gpio_func func;
  56         return (nouveau_gpio_find(dev, 0, tag, 0xff, &func)) == 0;
  57 }
  58
  59 static inline int
  60 nouveau_gpio_func_set(struct drm_device *dev, u8 tag, int state)
  61 {
  62         return nouveau_gpio_set(dev, 0, tag, 0xff, state);
  63 }
  64
  65 static inline int
  66 nouveau_gpio_func_get(struct drm_device *dev, u8 tag)
  67 {
  68         return nouveau_gpio_get(dev, 0, tag, 0xff);
  69 }
  70
  71 #endif