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/*
* Copyright 2013 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 "priv.h"
#include <core/msgqueue.h>
#include <subdev/timer.h>
void
nvkm_pmu_pgob(struct nvkm_pmu *pmu, bool enable)
{
if (pmu && pmu->func->pgob)
pmu->func->pgob(pmu, enable);
}
static void
nvkm_pmu_recv(struct work_struct *work)
{
struct nvkm_pmu *pmu = container_of(work, typeof(*pmu), recv.work);
return pmu->func->recv(pmu);
}
int
nvkm_pmu_send(struct nvkm_pmu *pmu, u32 reply[2],
u32 process, u32 message, u32 data0, u32 data1)
{
if (!pmu || !pmu->func->send)
return -ENODEV;
return pmu->func->send(pmu, reply, process, message, data0, data1);
}
static void
nvkm_pmu_intr(struct nvkm_subdev *subdev)
{
struct nvkm_pmu *pmu = nvkm_pmu(subdev);
if (!pmu->func->intr)
return;
pmu->func->intr(pmu);
}
static int
nvkm_pmu_fini(struct nvkm_subdev *subdev, bool suspend)
{
struct nvkm_pmu *pmu = nvkm_pmu(subdev);
if (pmu->func->fini)
pmu->func->fini(pmu);
flush_work(&pmu->recv.work);
return 0;
}
static int
nvkm_pmu_reset(struct nvkm_pmu *pmu)
{
struct nvkm_device *device = pmu->subdev.device;
if (!pmu->func->enabled(pmu))
return 0;
/* Inhibit interrupts, and wait for idle. */
nvkm_wr32(device, 0x10a014, 0x0000ffff);
nvkm_msec(device, 2000,
if (!nvkm_rd32(device, 0x10a04c))
break;
);
/* Reset. */
if (pmu->func->reset)
pmu->func->reset(pmu);
/* Wait for IMEM/DMEM scrubbing to be complete. */
nvkm_msec(device, 2000,
if (!(nvkm_rd32(device, 0x10a10c) & 0x00000006))
break;
);
return 0;
}
static int
nvkm_pmu_preinit(struct nvkm_subdev *subdev)
{
struct nvkm_pmu *pmu = nvkm_pmu(subdev);
return nvkm_pmu_reset(pmu);
}
static int
nvkm_pmu_init(struct nvkm_subdev *subdev)
{
struct nvkm_pmu *pmu = nvkm_pmu(subdev);
int ret = nvkm_pmu_reset(pmu);
if (ret == 0 && pmu->func->init)
ret = pmu->func->init(pmu);
return ret;
}
static int
nvkm_pmu_oneinit(struct nvkm_subdev *subdev)
{
struct nvkm_pmu *pmu = nvkm_pmu(subdev);
return nvkm_falcon_v1_new(&pmu->subdev, "PMU", 0x10a000, &pmu->falcon);
}
static void *
nvkm_pmu_dtor(struct nvkm_subdev *subdev)
{
struct nvkm_pmu *pmu = nvkm_pmu(subdev);
nvkm_msgqueue_del(&pmu->queue);
nvkm_falcon_del(&pmu->falcon);
return nvkm_pmu(subdev);
}
static const struct nvkm_subdev_func
nvkm_pmu = {
.dtor = nvkm_pmu_dtor,
.preinit = nvkm_pmu_preinit,
.oneinit = nvkm_pmu_oneinit,
.init = nvkm_pmu_init,
.fini = nvkm_pmu_fini,
.intr = nvkm_pmu_intr,
};
int
nvkm_pmu_ctor(const struct nvkm_pmu_func *func, struct nvkm_device *device,
int index, struct nvkm_pmu *pmu)
{
nvkm_subdev_ctor(&nvkm_pmu, device, index, &pmu->subdev);
pmu->func = func;
INIT_WORK(&pmu->recv.work, nvkm_pmu_recv);
init_waitqueue_head(&pmu->recv.wait);
return 0;
}
int
nvkm_pmu_new_(const struct nvkm_pmu_func *func, struct nvkm_device *device,
int index, struct nvkm_pmu **ppmu)
{
struct nvkm_pmu *pmu;
if (!(pmu = *ppmu = kzalloc(sizeof(*pmu), GFP_KERNEL)))
return -ENOMEM;
return nvkm_pmu_ctor(func, device, index, *ppmu);
}
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