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linux/drivers/media/platform/vsp1/vsp1_drv.c
Laurent Pinchart a0991c71ea v4l: vsp1: Don't recycle active list at display start 
When the display start interrupt occurs, we know that the hardware has
finished loading the active display list. The driver then proceeds to
recycle the list, assuming it won't be needed anymore.

This assumption holds true for headerless display lists, as the VSP
doesn't reload the list for the next frame if it hasn't changed.
However, this isn't true anymore for header display lists, as they are
loaded at every frame start regardless of whether they have been
updated.

To prepare for header display lists usage in display pipelines, we need
to postpone recycling the list until it gets replaced by a new one
through a page flip. The driver already does so in the frame end
interrupt handler, so all we need is to skip list recycling in the
display start interrupt handler.

While the active list can be recycled at display start for headerless
display lists, there's no real harm in postponing that to the frame end
interrupt handler in all cases. This simplifies interrupt handling as we
don't need to process the display start interrupt anymore.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Acked-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
2017-07-29 23:46:56 +03:00

846 lines
20 KiB
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/*
* vsp1_drv.c -- R-Car VSP1 Driver
*
* Copyright (C) 2013-2015 Renesas Electronics Corporation
*
* Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*/
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/videodev2.h>
#include <media/rcar-fcp.h>
#include <media/v4l2-subdev.h>
#include "vsp1.h"
#include "vsp1_bru.h"
#include "vsp1_clu.h"
#include "vsp1_dl.h"
#include "vsp1_drm.h"
#include "vsp1_hgo.h"
#include "vsp1_hgt.h"
#include "vsp1_hsit.h"
#include "vsp1_lif.h"
#include "vsp1_lut.h"
#include "vsp1_pipe.h"
#include "vsp1_rwpf.h"
#include "vsp1_sru.h"
#include "vsp1_uds.h"
#include "vsp1_video.h"
/* -----------------------------------------------------------------------------
* Interrupt Handling
*/
static irqreturn_t vsp1_irq_handler(int irq, void *data)
{
u32 mask = VI6_WFP_IRQ_STA_DFE | VI6_WFP_IRQ_STA_FRE;
struct vsp1_device *vsp1 = data;
irqreturn_t ret = IRQ_NONE;
unsigned int i;
u32 status;
for (i = 0; i < vsp1->info->wpf_count; ++i) {
struct vsp1_rwpf *wpf = vsp1->wpf[i];
if (wpf == NULL)
continue;
status = vsp1_read(vsp1, VI6_WPF_IRQ_STA(i));
vsp1_write(vsp1, VI6_WPF_IRQ_STA(i), ~status & mask);
if (status & VI6_WFP_IRQ_STA_DFE) {
vsp1_pipeline_frame_end(wpf->pipe);
ret = IRQ_HANDLED;
}
}
return ret;
}
/* -----------------------------------------------------------------------------
* Entities
*/
/*
* vsp1_create_sink_links - Create links from all sources to the given sink
*
* This function creates media links from all valid sources to the given sink
* pad. Links that would be invalid according to the VSP1 hardware capabilities
* are skipped. Those include all links
*
* - from a UDS to a UDS (UDS entities can't be chained)
* - from an entity to itself (no loops are allowed)
*/
static int vsp1_create_sink_links(struct vsp1_device *vsp1,
struct vsp1_entity *sink)
{
struct media_entity *entity = &sink->subdev.entity;
struct vsp1_entity *source;
unsigned int pad;
int ret;
list_for_each_entry(source, &vsp1->entities, list_dev) {
u32 flags;
if (source->type == sink->type)
continue;
if (source->type == VSP1_ENTITY_HGO ||
source->type == VSP1_ENTITY_HGT ||
source->type == VSP1_ENTITY_LIF ||
source->type == VSP1_ENTITY_WPF)
continue;
flags = source->type == VSP1_ENTITY_RPF &&
sink->type == VSP1_ENTITY_WPF &&
source->index == sink->index
? MEDIA_LNK_FL_ENABLED : 0;
for (pad = 0; pad < entity->num_pads; ++pad) {
if (!(entity->pads[pad].flags & MEDIA_PAD_FL_SINK))
continue;
ret = media_create_pad_link(&source->subdev.entity,
source->source_pad,
entity, pad, flags);
if (ret < 0)
return ret;
if (flags & MEDIA_LNK_FL_ENABLED)
source->sink = entity;
}
}
return 0;
}
static int vsp1_uapi_create_links(struct vsp1_device *vsp1)
{
struct vsp1_entity *entity;
unsigned int i;
int ret;
list_for_each_entry(entity, &vsp1->entities, list_dev) {
if (entity->type == VSP1_ENTITY_LIF ||
entity->type == VSP1_ENTITY_RPF)
continue;
ret = vsp1_create_sink_links(vsp1, entity);
if (ret < 0)
return ret;
}
if (vsp1->hgo) {
ret = media_create_pad_link(&vsp1->hgo->histo.entity.subdev.entity,
HISTO_PAD_SOURCE,
&vsp1->hgo->histo.video.entity, 0,
MEDIA_LNK_FL_ENABLED |
MEDIA_LNK_FL_IMMUTABLE);
if (ret < 0)
return ret;
}
if (vsp1->hgt) {
ret = media_create_pad_link(&vsp1->hgt->histo.entity.subdev.entity,
HISTO_PAD_SOURCE,
&vsp1->hgt->histo.video.entity, 0,
MEDIA_LNK_FL_ENABLED |
MEDIA_LNK_FL_IMMUTABLE);
if (ret < 0)
return ret;
}
if (vsp1->lif) {
ret = media_create_pad_link(&vsp1->wpf[0]->entity.subdev.entity,
RWPF_PAD_SOURCE,
&vsp1->lif->entity.subdev.entity,
LIF_PAD_SINK, 0);
if (ret < 0)
return ret;
}
for (i = 0; i < vsp1->info->rpf_count; ++i) {
struct vsp1_rwpf *rpf = vsp1->rpf[i];
ret = media_create_pad_link(&rpf->video->video.entity, 0,
&rpf->entity.subdev.entity,
RWPF_PAD_SINK,
MEDIA_LNK_FL_ENABLED |
MEDIA_LNK_FL_IMMUTABLE);
if (ret < 0)
return ret;
}
for (i = 0; i < vsp1->info->wpf_count; ++i) {
/*
* Connect the video device to the WPF. All connections are
* immutable.
*/
struct vsp1_rwpf *wpf = vsp1->wpf[i];
ret = media_create_pad_link(&wpf->entity.subdev.entity,
RWPF_PAD_SOURCE,
&wpf->video->video.entity, 0,
MEDIA_LNK_FL_IMMUTABLE |
MEDIA_LNK_FL_ENABLED);
if (ret < 0)
return ret;
}
return 0;
}
static void vsp1_destroy_entities(struct vsp1_device *vsp1)
{
struct vsp1_entity *entity, *_entity;
struct vsp1_video *video, *_video;
list_for_each_entry_safe(entity, _entity, &vsp1->entities, list_dev) {
list_del(&entity->list_dev);
vsp1_entity_destroy(entity);
}
list_for_each_entry_safe(video, _video, &vsp1->videos, list) {
list_del(&video->list);
vsp1_video_cleanup(video);
}
v4l2_device_unregister(&vsp1->v4l2_dev);
if (vsp1->info->uapi)
media_device_unregister(&vsp1->media_dev);
media_device_cleanup(&vsp1->media_dev);
if (!vsp1->info->uapi)
vsp1_drm_cleanup(vsp1);
}
static int vsp1_create_entities(struct vsp1_device *vsp1)
{
struct media_device *mdev = &vsp1->media_dev;
struct v4l2_device *vdev = &vsp1->v4l2_dev;
struct vsp1_entity *entity;
unsigned int i;
int ret;
mdev->dev = vsp1->dev;
mdev->hw_revision = vsp1->version;
strlcpy(mdev->model, vsp1->info->model, sizeof(mdev->model));
snprintf(mdev->bus_info, sizeof(mdev->bus_info), "platform:%s",
dev_name(mdev->dev));
media_device_init(mdev);
vsp1->media_ops.link_setup = vsp1_entity_link_setup;
/*
* Don't perform link validation when the userspace API is disabled as
* the pipeline is configured internally by the driver in that case, and
* its configuration can thus be trusted.
*/
if (vsp1->info->uapi)
vsp1->media_ops.link_validate = v4l2_subdev_link_validate;
vdev->mdev = mdev;
ret = v4l2_device_register(vsp1->dev, vdev);
if (ret < 0) {
dev_err(vsp1->dev, "V4L2 device registration failed (%d)\n",
ret);
goto done;
}
/* Instantiate all the entities. */
if (vsp1->info->features & VSP1_HAS_BRU) {
vsp1->bru = vsp1_bru_create(vsp1);
if (IS_ERR(vsp1->bru)) {
ret = PTR_ERR(vsp1->bru);
goto done;
}
list_add_tail(&vsp1->bru->entity.list_dev, &vsp1->entities);
}
if (vsp1->info->features & VSP1_HAS_CLU) {
vsp1->clu = vsp1_clu_create(vsp1);
if (IS_ERR(vsp1->clu)) {
ret = PTR_ERR(vsp1->clu);
goto done;
}
list_add_tail(&vsp1->clu->entity.list_dev, &vsp1->entities);
}
vsp1->hsi = vsp1_hsit_create(vsp1, true);
if (IS_ERR(vsp1->hsi)) {
ret = PTR_ERR(vsp1->hsi);
goto done;
}
list_add_tail(&vsp1->hsi->entity.list_dev, &vsp1->entities);
vsp1->hst = vsp1_hsit_create(vsp1, false);
if (IS_ERR(vsp1->hst)) {
ret = PTR_ERR(vsp1->hst);
goto done;
}
list_add_tail(&vsp1->hst->entity.list_dev, &vsp1->entities);
if (vsp1->info->features & VSP1_HAS_HGO && vsp1->info->uapi) {
vsp1->hgo = vsp1_hgo_create(vsp1);
if (IS_ERR(vsp1->hgo)) {
ret = PTR_ERR(vsp1->hgo);
goto done;
}
list_add_tail(&vsp1->hgo->histo.entity.list_dev,
&vsp1->entities);
}
if (vsp1->info->features & VSP1_HAS_HGT && vsp1->info->uapi) {
vsp1->hgt = vsp1_hgt_create(vsp1);
if (IS_ERR(vsp1->hgt)) {
ret = PTR_ERR(vsp1->hgt);
goto done;
}
list_add_tail(&vsp1->hgt->histo.entity.list_dev,
&vsp1->entities);
}
/*
* The LIF is only supported when used in conjunction with the DU, in
* which case the userspace API is disabled. If the userspace API is
* enabled skip the LIF, even when present.
*/
if (vsp1->info->features & VSP1_HAS_LIF && !vsp1->info->uapi) {
vsp1->lif = vsp1_lif_create(vsp1);
if (IS_ERR(vsp1->lif)) {
ret = PTR_ERR(vsp1->lif);
goto done;
}
list_add_tail(&vsp1->lif->entity.list_dev, &vsp1->entities);
}
if (vsp1->info->features & VSP1_HAS_LUT) {
vsp1->lut = vsp1_lut_create(vsp1);
if (IS_ERR(vsp1->lut)) {
ret = PTR_ERR(vsp1->lut);
goto done;
}
list_add_tail(&vsp1->lut->entity.list_dev, &vsp1->entities);
}
for (i = 0; i < vsp1->info->rpf_count; ++i) {
struct vsp1_rwpf *rpf;
rpf = vsp1_rpf_create(vsp1, i);
if (IS_ERR(rpf)) {
ret = PTR_ERR(rpf);
goto done;
}
vsp1->rpf[i] = rpf;
list_add_tail(&rpf->entity.list_dev, &vsp1->entities);
if (vsp1->info->uapi) {
struct vsp1_video *video = vsp1_video_create(vsp1, rpf);
if (IS_ERR(video)) {
ret = PTR_ERR(video);
goto done;
}
list_add_tail(&video->list, &vsp1->videos);
}
}
if (vsp1->info->features & VSP1_HAS_SRU) {
vsp1->sru = vsp1_sru_create(vsp1);
if (IS_ERR(vsp1->sru)) {
ret = PTR_ERR(vsp1->sru);
goto done;
}
list_add_tail(&vsp1->sru->entity.list_dev, &vsp1->entities);
}
for (i = 0; i < vsp1->info->uds_count; ++i) {
struct vsp1_uds *uds;
uds = vsp1_uds_create(vsp1, i);
if (IS_ERR(uds)) {
ret = PTR_ERR(uds);
goto done;
}
vsp1->uds[i] = uds;
list_add_tail(&uds->entity.list_dev, &vsp1->entities);
}
for (i = 0; i < vsp1->info->wpf_count; ++i) {
struct vsp1_rwpf *wpf;
wpf = vsp1_wpf_create(vsp1, i);
if (IS_ERR(wpf)) {
ret = PTR_ERR(wpf);
goto done;
}
vsp1->wpf[i] = wpf;
list_add_tail(&wpf->entity.list_dev, &vsp1->entities);
if (vsp1->info->uapi) {
struct vsp1_video *video = vsp1_video_create(vsp1, wpf);
if (IS_ERR(video)) {
ret = PTR_ERR(video);
goto done;
}
list_add_tail(&video->list, &vsp1->videos);
wpf->entity.sink = &video->video.entity;
}
}
/* Register all subdevs. */
list_for_each_entry(entity, &vsp1->entities, list_dev) {
ret = v4l2_device_register_subdev(&vsp1->v4l2_dev,
&entity->subdev);
if (ret < 0)
goto done;
}
/* Create links. */
if (vsp1->info->uapi)
ret = vsp1_uapi_create_links(vsp1);
else
ret = vsp1_drm_create_links(vsp1);
if (ret < 0)
goto done;
/*
* Register subdev nodes if the userspace API is enabled or initialize
* the DRM pipeline otherwise.
*/
if (vsp1->info->uapi) {
ret = v4l2_device_register_subdev_nodes(&vsp1->v4l2_dev);
if (ret < 0)
goto done;
ret = media_device_register(mdev);
} else {
ret = vsp1_drm_init(vsp1);
}
done:
if (ret < 0)
vsp1_destroy_entities(vsp1);
return ret;
}
int vsp1_reset_wpf(struct vsp1_device *vsp1, unsigned int index)
{
unsigned int timeout;
u32 status;
status = vsp1_read(vsp1, VI6_STATUS);
if (!(status & VI6_STATUS_SYS_ACT(index)))
return 0;
vsp1_write(vsp1, VI6_SRESET, VI6_SRESET_SRTS(index));
for (timeout = 10; timeout > 0; --timeout) {
status = vsp1_read(vsp1, VI6_STATUS);
if (!(status & VI6_STATUS_SYS_ACT(index)))
break;
usleep_range(1000, 2000);
}
if (!timeout) {
dev_err(vsp1->dev, "failed to reset wpf.%u\n", index);
return -ETIMEDOUT;
}
return 0;
}
static int vsp1_device_init(struct vsp1_device *vsp1)
{
unsigned int i;
int ret;
/* Reset any channel that might be running. */
for (i = 0; i < vsp1->info->wpf_count; ++i) {
ret = vsp1_reset_wpf(vsp1, i);
if (ret < 0)
return ret;
}
vsp1_write(vsp1, VI6_CLK_DCSWT, (8 << VI6_CLK_DCSWT_CSTPW_SHIFT) |
(8 << VI6_CLK_DCSWT_CSTRW_SHIFT));
for (i = 0; i < vsp1->info->rpf_count; ++i)
vsp1_write(vsp1, VI6_DPR_RPF_ROUTE(i), VI6_DPR_NODE_UNUSED);
for (i = 0; i < vsp1->info->uds_count; ++i)
vsp1_write(vsp1, VI6_DPR_UDS_ROUTE(i), VI6_DPR_NODE_UNUSED);
vsp1_write(vsp1, VI6_DPR_SRU_ROUTE, VI6_DPR_NODE_UNUSED);
vsp1_write(vsp1, VI6_DPR_LUT_ROUTE, VI6_DPR_NODE_UNUSED);
vsp1_write(vsp1, VI6_DPR_CLU_ROUTE, VI6_DPR_NODE_UNUSED);
vsp1_write(vsp1, VI6_DPR_HST_ROUTE, VI6_DPR_NODE_UNUSED);
vsp1_write(vsp1, VI6_DPR_HSI_ROUTE, VI6_DPR_NODE_UNUSED);
vsp1_write(vsp1, VI6_DPR_BRU_ROUTE, VI6_DPR_NODE_UNUSED);
vsp1_write(vsp1, VI6_DPR_HGO_SMPPT, (7 << VI6_DPR_SMPPT_TGW_SHIFT) |
(VI6_DPR_NODE_UNUSED << VI6_DPR_SMPPT_PT_SHIFT));
vsp1_write(vsp1, VI6_DPR_HGT_SMPPT, (7 << VI6_DPR_SMPPT_TGW_SHIFT) |
(VI6_DPR_NODE_UNUSED << VI6_DPR_SMPPT_PT_SHIFT));
vsp1_dlm_setup(vsp1);
return 0;
}
/*
* vsp1_device_get - Acquire the VSP1 device
*
* Make sure the device is not suspended and initialize it if needed.
*
* Return 0 on success or a negative error code otherwise.
*/
int vsp1_device_get(struct vsp1_device *vsp1)
{
int ret;
ret = pm_runtime_get_sync(vsp1->dev);
return ret < 0 ? ret : 0;
}
/*
* vsp1_device_put - Release the VSP1 device
*
* Decrement the VSP1 reference count and cleanup the device if the last
* reference is released.
*/
void vsp1_device_put(struct vsp1_device *vsp1)
{
pm_runtime_put_sync(vsp1->dev);
}
/* -----------------------------------------------------------------------------
* Power Management
*/
static int __maybe_unused vsp1_pm_suspend(struct device *dev)
{
struct vsp1_device *vsp1 = dev_get_drvdata(dev);
vsp1_pipelines_suspend(vsp1);
pm_runtime_force_suspend(vsp1->dev);
return 0;
}
static int __maybe_unused vsp1_pm_resume(struct device *dev)
{
struct vsp1_device *vsp1 = dev_get_drvdata(dev);
pm_runtime_force_resume(vsp1->dev);
vsp1_pipelines_resume(vsp1);
return 0;
}
static int __maybe_unused vsp1_pm_runtime_suspend(struct device *dev)
{
struct vsp1_device *vsp1 = dev_get_drvdata(dev);
rcar_fcp_disable(vsp1->fcp);
return 0;
}
static int __maybe_unused vsp1_pm_runtime_resume(struct device *dev)
{
struct vsp1_device *vsp1 = dev_get_drvdata(dev);
int ret;
if (vsp1->info) {
ret = vsp1_device_init(vsp1);
if (ret < 0)
return ret;
}
return rcar_fcp_enable(vsp1->fcp);
}
static const struct dev_pm_ops vsp1_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(vsp1_pm_suspend, vsp1_pm_resume)
SET_RUNTIME_PM_OPS(vsp1_pm_runtime_suspend, vsp1_pm_runtime_resume, NULL)
};
/* -----------------------------------------------------------------------------
* Platform Driver
*/
static const struct vsp1_device_info vsp1_device_infos[] = {
{
.version = VI6_IP_VERSION_MODEL_VSPS_H2,
.model = "VSP1-S",
.gen = 2,
.features = VSP1_HAS_BRU | VSP1_HAS_CLU | VSP1_HAS_HGO
| VSP1_HAS_HGT | VSP1_HAS_LUT | VSP1_HAS_SRU
| VSP1_HAS_WPF_VFLIP,
.rpf_count = 5,
.uds_count = 3,
.wpf_count = 4,
.num_bru_inputs = 4,
.uapi = true,
}, {
.version = VI6_IP_VERSION_MODEL_VSPR_H2,
.model = "VSP1-R",
.gen = 2,
.features = VSP1_HAS_BRU | VSP1_HAS_SRU | VSP1_HAS_WPF_VFLIP,
.rpf_count = 5,
.uds_count = 3,
.wpf_count = 4,
.num_bru_inputs = 4,
.uapi = true,
}, {
.version = VI6_IP_VERSION_MODEL_VSPD_GEN2,
.model = "VSP1-D",
.gen = 2,
.features = VSP1_HAS_BRU | VSP1_HAS_HGO | VSP1_HAS_LIF
| VSP1_HAS_LUT,
.rpf_count = 4,
.uds_count = 1,
.wpf_count = 1,
.num_bru_inputs = 4,
.uapi = true,
}, {
.version = VI6_IP_VERSION_MODEL_VSPS_M2,
.model = "VSP1-S",
.gen = 2,
.features = VSP1_HAS_BRU | VSP1_HAS_CLU | VSP1_HAS_HGO
| VSP1_HAS_HGT | VSP1_HAS_LUT | VSP1_HAS_SRU
| VSP1_HAS_WPF_VFLIP,
.rpf_count = 5,
.uds_count = 1,
.wpf_count = 4,
.num_bru_inputs = 4,
.uapi = true,
}, {
.version = VI6_IP_VERSION_MODEL_VSPS_V2H,
.model = "VSP1V-S",
.gen = 2,
.features = VSP1_HAS_BRU | VSP1_HAS_CLU | VSP1_HAS_LUT
| VSP1_HAS_SRU | VSP1_HAS_WPF_VFLIP,
.rpf_count = 4,
.uds_count = 1,
.wpf_count = 4,
.num_bru_inputs = 4,
.uapi = true,
}, {
.version = VI6_IP_VERSION_MODEL_VSPD_V2H,
.model = "VSP1V-D",
.gen = 2,
.features = VSP1_HAS_BRU | VSP1_HAS_CLU | VSP1_HAS_LUT
| VSP1_HAS_LIF,
.rpf_count = 4,
.uds_count = 1,
.wpf_count = 1,
.num_bru_inputs = 4,
.uapi = true,
}, {
.version = VI6_IP_VERSION_MODEL_VSPI_GEN3,
.model = "VSP2-I",
.gen = 3,
.features = VSP1_HAS_CLU | VSP1_HAS_HGO | VSP1_HAS_HGT
| VSP1_HAS_LUT | VSP1_HAS_SRU | VSP1_HAS_WPF_HFLIP
| VSP1_HAS_WPF_VFLIP,
.rpf_count = 1,
.uds_count = 1,
.wpf_count = 1,
.uapi = true,
}, {
.version = VI6_IP_VERSION_MODEL_VSPBD_GEN3,
.model = "VSP2-BD",
.gen = 3,
.features = VSP1_HAS_BRU | VSP1_HAS_WPF_VFLIP,
.rpf_count = 5,
.wpf_count = 1,
.num_bru_inputs = 5,
.uapi = true,
}, {
.version = VI6_IP_VERSION_MODEL_VSPBC_GEN3,
.model = "VSP2-BC",
.gen = 3,
.features = VSP1_HAS_BRU | VSP1_HAS_CLU | VSP1_HAS_HGO
| VSP1_HAS_LUT | VSP1_HAS_WPF_VFLIP,
.rpf_count = 5,
.wpf_count = 1,
.num_bru_inputs = 5,
.uapi = true,
}, {
.version = VI6_IP_VERSION_MODEL_VSPD_GEN3,
.model = "VSP2-D",
.gen = 3,
.features = VSP1_HAS_BRU | VSP1_HAS_LIF | VSP1_HAS_WPF_VFLIP,
.rpf_count = 5,
.wpf_count = 2,
.num_bru_inputs = 5,
},
};
static int vsp1_probe(struct platform_device *pdev)
{
struct vsp1_device *vsp1;
struct device_node *fcp_node;
struct resource *irq;
struct resource *io;
unsigned int i;
int ret;
vsp1 = devm_kzalloc(&pdev->dev, sizeof(*vsp1), GFP_KERNEL);
if (vsp1 == NULL)
return -ENOMEM;
vsp1->dev = &pdev->dev;
INIT_LIST_HEAD(&vsp1->entities);
INIT_LIST_HEAD(&vsp1->videos);
platform_set_drvdata(pdev, vsp1);
/* I/O and IRQ resources (clock managed by the clock PM domain) */
io = platform_get_resource(pdev, IORESOURCE_MEM, 0);
vsp1->mmio = devm_ioremap_resource(&pdev->dev, io);
if (IS_ERR(vsp1->mmio))
return PTR_ERR(vsp1->mmio);
irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
if (!irq) {
dev_err(&pdev->dev, "missing IRQ\n");
return -EINVAL;
}
ret = devm_request_irq(&pdev->dev, irq->start, vsp1_irq_handler,
IRQF_SHARED, dev_name(&pdev->dev), vsp1);
if (ret < 0) {
dev_err(&pdev->dev, "failed to request IRQ\n");
return ret;
}
/* FCP (optional) */
fcp_node = of_parse_phandle(pdev->dev.of_node, "renesas,fcp", 0);
if (fcp_node) {
vsp1->fcp = rcar_fcp_get(fcp_node);
of_node_put(fcp_node);
if (IS_ERR(vsp1->fcp)) {
dev_dbg(&pdev->dev, "FCP not found (%ld)\n",
PTR_ERR(vsp1->fcp));
return PTR_ERR(vsp1->fcp);
}
/*
* When the FCP is present, it handles all bus master accesses
* for the VSP and must thus be used in place of the VSP device
* to map DMA buffers.
*/
vsp1->bus_master = rcar_fcp_get_device(vsp1->fcp);
} else {
vsp1->bus_master = vsp1->dev;
}
/* Configure device parameters based on the version register. */
pm_runtime_enable(&pdev->dev);
ret = pm_runtime_get_sync(&pdev->dev);
if (ret < 0)
goto done;
vsp1->version = vsp1_read(vsp1, VI6_IP_VERSION);
pm_runtime_put_sync(&pdev->dev);
for (i = 0; i < ARRAY_SIZE(vsp1_device_infos); ++i) {
if ((vsp1->version & VI6_IP_VERSION_MODEL_MASK) ==
vsp1_device_infos[i].version) {
vsp1->info = &vsp1_device_infos[i];
break;
}
}
if (!vsp1->info) {
dev_err(&pdev->dev, "unsupported IP version 0x%08x\n",
vsp1->version);
ret = -ENXIO;
goto done;
}
dev_dbg(&pdev->dev, "IP version 0x%08x\n", vsp1->version);
/* Instanciate entities */
ret = vsp1_create_entities(vsp1);
if (ret < 0) {
dev_err(&pdev->dev, "failed to create entities\n");
goto done;
}
done:
if (ret)
pm_runtime_disable(&pdev->dev);
return ret;
}
static int vsp1_remove(struct platform_device *pdev)
{
struct vsp1_device *vsp1 = platform_get_drvdata(pdev);
vsp1_destroy_entities(vsp1);
rcar_fcp_put(vsp1->fcp);
pm_runtime_disable(&pdev->dev);
return 0;
}
static const struct of_device_id vsp1_of_match[] = {
{ .compatible = "renesas,vsp1" },
{ .compatible = "renesas,vsp2" },
{ },
};
MODULE_DEVICE_TABLE(of, vsp1_of_match);
static struct platform_driver vsp1_platform_driver = {
.probe = vsp1_probe,
.remove = vsp1_remove,
.driver = {
.name = "vsp1",
.pm = &vsp1_pm_ops,
.of_match_table = vsp1_of_match,
},
};
module_platform_driver(vsp1_platform_driver);
MODULE_ALIAS("vsp1");
MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@ideasonboard.com>");
MODULE_DESCRIPTION("Renesas VSP1 Driver");
MODULE_LICENSE("GPL");
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