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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.
*
*/
#include "priv.h"
struct priv {
struct nvkm_bios *bios;
u32 bar0;
};
static u32
pramin_read(void *data, u32 offset, u32 length, struct nvkm_bios *bios)
{
struct nvkm_device *device = bios->subdev.device;
u32 i;
if (offset + length <= 0x00100000) {
for (i = offset; i < offset + length; i += 4)
*(u32 *)&bios->data[i] = nvkm_rd32(device, 0x700000 + i);
return length;
}
return 0;
}
static void
pramin_fini(void *data)
{
struct priv *priv = data;
if (priv) {
struct nvkm_device *device = priv->bios->subdev.device;
nvkm_wr32(device, 0x001700, priv->bar0);
kfree(priv);
}
}
static void *
pramin_init(struct nvkm_bios *bios, const char *name)
{
struct nvkm_subdev *subdev = &bios->subdev;
struct nvkm_device *device = subdev->device;
struct priv *priv = NULL;
u64 addr = 0;
/* PRAMIN always potentially available prior to nv50 */
if (device->card_type < NV_50)
return NULL;
/* we can't get the bios image pointer without PDISP */
if (device->card_type >= GM100)
addr = nvkm_rd32(device, 0x021c04);
else
if (device->card_type >= NV_C0)
addr = nvkm_rd32(device, 0x022500);
if (addr & 0x00000001) {
nvkm_debug(subdev, "... display disabled\n");
return ERR_PTR(-ENODEV);
}
/* check that the window is enabled and in vram, particularly
* important as we don't want to be touching vram on an
* uninitialised board
*/
if (device->card_type >= GV100)
addr = nvkm_rd32(device, 0x625f04);
else
addr = nvkm_rd32(device, 0x619f04);
if (!(addr & 0x00000008)) {
nvkm_debug(subdev, "... not enabled\n");
return ERR_PTR(-ENODEV);
}
if ( (addr & 0x00000003) != 1) {
nvkm_debug(subdev, "... not in vram\n");
return ERR_PTR(-ENODEV);
}
/* some alternate method inherited from xf86-video-nv... */
addr = (addr & 0xffffff00) << 8;
if (!addr) {
addr = (u64)nvkm_rd32(device, 0x001700) << 16;
addr += 0xf0000;
}
/* modify bar0 PRAMIN window to cover the bios image */
if (!(priv = kmalloc(sizeof(*priv), GFP_KERNEL))) {
nvkm_error(subdev, "... out of memory\n");
return ERR_PTR(-ENOMEM);
}
priv->bios = bios;
priv->bar0 = nvkm_rd32(device, 0x001700);
nvkm_wr32(device, 0x001700, addr >> 16);
return priv;
}
const struct nvbios_source
nvbios_ramin = {
.name = "PRAMIN",
.init = pramin_init,
.fini = pramin_fini,
.read = pramin_read,
.rw = true,
};
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