77 строки
2.2 KiB
C
77 строки
2.2 KiB
C
|
/*
|
||
|
|
* Copyright 2010 Red Hat Inc.
|
||
|
|
*
|
||
|
|
* 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 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 HOLDER(S) OR AUTHOR(S) 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.
|
||
|
|
*
|
||
|
|
* Authors: Ben Skeggs
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include "drmP.h"
|
||
|
|
#include "nouveau_drv.h"
|
||
|
|
#include "nouveau_hw.h"
|
||
|
|
|
||
|
|
static int
|
||
|
|
nv50_gpio_location(struct dcb_gpio_entry *gpio, uint32_t *reg, uint32_t *shift)
|
||
|
|
{
|
||
|
|
const uint32_t nv50_gpio_reg[4] = { 0xe104, 0xe108, 0xe280, 0xe284 };
|
||
|
|
|
||
|
|
if (gpio->line > 32)
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
*reg = nv50_gpio_reg[gpio->line >> 3];
|
||
|
|
*shift = (gpio->line & 7) << 2;
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
int
|
||
|
|
nv50_gpio_get(struct drm_device *dev, enum dcb_gpio_tag tag)
|
||
|
|
{
|
||
|
|
struct dcb_gpio_entry *gpio;
|
||
|
|
uint32_t r, s, v;
|
||
|
|
|
||
|
|
gpio = nouveau_bios_gpio_entry(dev, tag);
|
||
|
|
if (!gpio)
|
||
|
|
return -ENOENT;
|
||
|
|
|
||
|
|
if (nv50_gpio_location(gpio, &r, &s))
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
v = nv_rd32(dev, r) >> (s + 2);
|
||
|
|
return ((v & 1) == (gpio->state[1] & 1));
|
||
|
|
}
|
||
|
|
|
||
|
|
int
|
||
|
|
nv50_gpio_set(struct drm_device *dev, enum dcb_gpio_tag tag, int state)
|
||
|
|
{
|
||
|
|
struct dcb_gpio_entry *gpio;
|
||
|
|
uint32_t r, s, v;
|
||
|
|
|
||
|
|
gpio = nouveau_bios_gpio_entry(dev, tag);
|
||
|
|
if (!gpio)
|
||
|
|
return -ENOENT;
|
||
|
|
|
||
|
|
if (nv50_gpio_location(gpio, &r, &s))
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
v = nv_rd32(dev, r) & ~(0x3 << s);
|
||
|
|
v |= (gpio->state[state] ^ 2) << s;
|
||
|
|
nv_wr32(dev, r, v);
|
||
|
|
return 0;
|
||
|
|
}
|