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/*
* Copyright 2012 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 <core/os.h>
#include <core/class.h>
#include <subdev/bios.h>
#include <subdev/bios/dcb.h>
#include <subdev/timer.h>
#include "nv50.h"
int
nv50_dac_power(struct nv50_disp_priv *priv, int or, u32 data)
{
const u32 stat = (data & NV50_DISP_DAC_PWR_HSYNC) |
(data & NV50_DISP_DAC_PWR_VSYNC) |
(data & NV50_DISP_DAC_PWR_DATA) |
(data & NV50_DISP_DAC_PWR_STATE);
const u32 doff = (or * 0x800);
nv_wait(priv, 0x61a004 + doff, 0x80000000, 0x00000000);
nv_mask(priv, 0x61a004 + doff, 0xc000007f, 0x80000000 | stat);
nv_wait(priv, 0x61a004 + doff, 0x80000000, 0x00000000);
return 0;
}
int
nv50_dac_sense(struct nv50_disp_priv *priv, int or, u32 loadval)
{
const u32 doff = (or * 0x800);
int load = -EINVAL;
nv_wr32(priv, 0x61a00c + doff, 0x00100000 | loadval);
mdelay(9);
udelay(500);
nv_wr32(priv, 0x61a00c + doff, 0x80000000);
load = (nv_rd32(priv, 0x61a00c + doff) & 0x38000000) >> 27;
nv_wr32(priv, 0x61a00c + doff, 0x00000000);
return load;
}
int
nv50_dac_mthd(struct nouveau_object *object, u32 mthd, void *args, u32 size)
{
struct nv50_disp_priv *priv = (void *)object->engine;
const u8 or = (mthd & NV50_DISP_DAC_MTHD_OR);
u32 *data = args;
int ret;
if (size < sizeof(u32))
return -EINVAL;
switch (mthd & ~0x3f) {
case NV50_DISP_DAC_PWR:
ret = priv->dac.power(priv, or, data[0]);
break;
case NV50_DISP_DAC_LOAD:
ret = priv->dac.sense(priv, or, data[0]);
if (ret >= 0) {
data[0] = ret;
ret = 0;
}
break;
default:
BUG_ON(1);
}
return ret;
}
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