/*
* Copyright (C) 2009 Francisco Jerez.
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial
* portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
*/
#include "drmP.h"
#include "nouveau_drv.h"
#include "nouveau_hw.h"
static bool
get_gpio_location(struct dcb_gpio_entry *ent, uint32_t *reg, uint32_t *shift,
uint32_t *mask)
{
if (ent->line < 2) {
*reg = NV_PCRTC_GPIO;
*shift = ent->line * 16;
*mask = 0x11;
} else if (ent->line < 10) {
*reg = NV_PCRTC_GPIO_EXT;
*shift = (ent->line - 2) * 4;
*mask = 0x3;
} else if (ent->line < 14) {
*reg = NV_PCRTC_850;
*shift = (ent->line - 10) * 4;
*mask = 0x3;
} else {
return false;
}
return true;
}
int
nv17_gpio_get(struct drm_device *dev, enum dcb_gpio_tag tag)
{
struct dcb_gpio_entry *ent = nouveau_bios_gpio_entry(dev, tag);
uint32_t reg, shift, mask, value;
if (!ent)
return -ENODEV;
if (!get_gpio_location(ent, ®, &shift, &mask))
return -ENODEV;
value = NVReadCRTC(dev, 0, reg) >> shift;
return (ent->invert ? 1 : 0) ^ (value & 1);
}
int
nv17_gpio_set(struct drm_device *dev, enum dcb_gpio_tag tag, int state)
{
struct dcb_gpio_entry *ent = nouveau_bios_gpio_entry(dev, tag);
uint32_t reg, shift, mask, value;
if (!ent)
return -ENODEV;
if (!get_gpio_location(ent, ®, &shift, &mask))
return -ENODEV;
value = ((ent->invert ? 1 : 0) ^ (state ? 1 : 0)) << shift;
mask = ~(mask << shift);
NVWriteCRTC(dev, 0, reg, value | (NVReadCRTC(dev, 0, reg) & mask));
return 0;
}
