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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 <subdev/ltcg.h>
struct nvc0_ltcg_priv {
struct nouveau_ltcg base;
u32 subp_nr;
};
static void
nvc0_ltcg_subp_isr(struct nvc0_ltcg_priv *priv, int unit, int subp)
{
u32 subp_base = 0x141000 + (unit * 0x2000) + (subp * 0x400);
u32 stat = nv_rd32(priv, subp_base + 0x020);
if (stat) {
nv_info(priv, "LTC%d_LTS%d: 0x%08x\n", unit, subp, stat);
nv_wr32(priv, subp_base + 0x020, stat);
}
}
static void
nvc0_ltcg_intr(struct nouveau_subdev *subdev)
{
struct nvc0_ltcg_priv *priv = (void *)subdev;
u32 units;
units = nv_rd32(priv, 0x00017c);
while (units) {
u32 subp, unit = ffs(units) - 1;
for (subp = 0; subp < priv->subp_nr; subp++)
nvc0_ltcg_subp_isr(priv, unit, subp);
units &= ~(1 << unit);
}
/* we do something horribly wrong and upset PMFB a lot, so mask off
* interrupts from it after the first one until it's fixed
*/
nv_mask(priv, 0x000640, 0x02000000, 0x00000000);
}
static int
nvc0_ltcg_ctor(struct nouveau_object *parent, struct nouveau_object *engine,
struct nouveau_oclass *oclass, void *data, u32 size,
struct nouveau_object **pobject)
{
struct nvc0_ltcg_priv *priv;
int ret;
ret = nouveau_ltcg_create(parent, engine, oclass, &priv);
*pobject = nv_object(priv);
if (ret)
return ret;
priv->subp_nr = nv_rd32(priv, 0x17e8dc) >> 24;
nv_mask(priv, 0x17e820, 0x00100000, 0x00000000); /* INTR_EN &= ~0x10 */
nv_subdev(priv)->intr = nvc0_ltcg_intr;
return 0;
}
struct nouveau_oclass
nvc0_ltcg_oclass = {
.handle = NV_SUBDEV(LTCG, 0xc0),
.ofuncs = &(struct nouveau_ofuncs) {
.ctor = nvc0_ltcg_ctor,
.dtor = _nouveau_ltcg_dtor,
.init = _nouveau_ltcg_init,
.fini = _nouveau_ltcg_fini,
},
};
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