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OpenCloudOS-Kernel/drivers/media/platform/rcar-vin/rcar-core.c

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/*
* Driver for Renesas R-Car VIN
*
* Copyright (C) 2016 Renesas Electronics Corp.
* Copyright (C) 2011-2013 Renesas Solutions Corp.
* Copyright (C) 2013 Cogent Embedded, Inc., <source@cogentembedded.com>
* Copyright (C) 2008 Magnus Damm
*
* Based on the soc-camera rcar_vin driver
*
* 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/module.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/of_graph.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/slab.h>
#include <media/v4l2-async.h>
#include <media/v4l2-fwnode.h>
#include <media/v4l2-mc.h>
#include "rcar-vin.h"
/*
* The companion CSI-2 receiver driver (rcar-csi2) is known
* and we know it has one source pad (pad 0) and four sink
* pads (pad 1-4). So to translate a pad on the remote
* CSI-2 receiver to/from the VIN internal channel number simply
* subtract/add one from the pad/channel number.
*/
#define rvin_group_csi_pad_to_channel(pad) ((pad) - 1)
#define rvin_group_csi_channel_to_pad(channel) ((channel) + 1)
/*
* Not all VINs are created equal, master VINs control the
* routing for other VIN's. We can figure out which VIN is
* master by looking at a VINs id.
*/
#define rvin_group_id_to_master(vin) ((vin) < 4 ? 0 : 4)
/* -----------------------------------------------------------------------------
* Media Controller link notification
*/
/* group lock should be held when calling this function. */
static int rvin_group_entity_to_csi_id(struct rvin_group *group,
struct media_entity *entity)
{
struct v4l2_subdev *sd;
unsigned int i;
sd = media_entity_to_v4l2_subdev(entity);
for (i = 0; i < RVIN_CSI_MAX; i++)
if (group->csi[i].subdev == sd)
return i;
return -ENODEV;
}
static unsigned int rvin_group_get_mask(struct rvin_dev *vin,
enum rvin_csi_id csi_id,
unsigned char channel)
{
const struct rvin_group_route *route;
unsigned int mask = 0;
for (route = vin->info->routes; route->mask; route++) {
if (route->vin == vin->id &&
route->csi == csi_id &&
route->channel == channel) {
vin_dbg(vin,
"Adding route: vin: %d csi: %d channel: %d\n",
route->vin, route->csi, route->channel);
mask |= route->mask;
}
}
return mask;
}
/*
* Link setup for the links between a VIN and a CSI-2 receiver is a bit
* complex. The reason for this is that the register controlling routing
* is not present in each VIN instance. There are special VINs which
* control routing for themselves and other VINs. There are not many
* different possible links combinations that can be enabled at the same
* time, therefor all already enabled links which are controlled by a
* master VIN need to be taken into account when making the decision
* if a new link can be enabled or not.
*
* 1. Find out which VIN the link the user tries to enable is connected to.
* 2. Lookup which master VIN controls the links for this VIN.
* 3. Start with a bitmask with all bits set.
* 4. For each previously enabled link from the master VIN bitwise AND its
* route mask (see documentation for mask in struct rvin_group_route)
* with the bitmask.
* 5. Bitwise AND the mask for the link the user tries to enable to the bitmask.
* 6. If the bitmask is not empty at this point the new link can be enabled
* while keeping all previous links enabled. Update the CHSEL value of the
* master VIN and inform the user that the link could be enabled.
*
* Please note that no link can be enabled if any VIN in the group is
* currently open.
*/
static int rvin_group_link_notify(struct media_link *link, u32 flags,
unsigned int notification)
{
struct rvin_group *group = container_of(link->graph_obj.mdev,
struct rvin_group, mdev);
unsigned int master_id, channel, mask_new, i;
unsigned int mask = ~0;
struct media_entity *entity;
struct video_device *vdev;
struct media_pad *csi_pad;
struct rvin_dev *vin = NULL;
int csi_id, ret;
ret = v4l2_pipeline_link_notify(link, flags, notification);
if (ret)
return ret;
/* Only care about link enablement for VIN nodes. */
if (!(flags & MEDIA_LNK_FL_ENABLED) ||
!is_media_entity_v4l2_video_device(link->sink->entity))
return 0;
/* If any entity is in use don't allow link changes. */
media_device_for_each_entity(entity, &group->mdev)
if (entity->use_count)
return -EBUSY;
mutex_lock(&group->lock);
/* Find the master VIN that controls the routes. */
vdev = media_entity_to_video_device(link->sink->entity);
vin = container_of(vdev, struct rvin_dev, vdev);
master_id = rvin_group_id_to_master(vin->id);
if (WARN_ON(!group->vin[master_id])) {
ret = -ENODEV;
goto out;
}
/* Build a mask for already enabled links. */
for (i = master_id; i < master_id + 4; i++) {
if (!group->vin[i])
continue;
/* Get remote CSI-2, if any. */
csi_pad = media_entity_remote_pad(
&group->vin[i]->vdev.entity.pads[0]);
if (!csi_pad)
continue;
csi_id = rvin_group_entity_to_csi_id(group, csi_pad->entity);
channel = rvin_group_csi_pad_to_channel(csi_pad->index);
mask &= rvin_group_get_mask(group->vin[i], csi_id, channel);
}
/* Add the new link to the existing mask and check if it works. */
csi_id = rvin_group_entity_to_csi_id(group, link->source->entity);
channel = rvin_group_csi_pad_to_channel(link->source->index);
mask_new = mask & rvin_group_get_mask(vin, csi_id, channel);
vin_dbg(vin, "Try link change mask: 0x%x new: 0x%x\n", mask, mask_new);
if (!mask_new) {
ret = -EMLINK;
goto out;
}
/* New valid CHSEL found, set the new value. */
ret = rvin_set_channel_routing(group->vin[master_id], __ffs(mask_new));
out:
mutex_unlock(&group->lock);
return ret;
}
static const struct media_device_ops rvin_media_ops = {
.link_notify = rvin_group_link_notify,
};
/* -----------------------------------------------------------------------------
* Gen3 CSI2 Group Allocator
*/
/* FIXME: This should if we find a system that supports more
* than one group for the whole system be replaced with a linked
* list of groups. And eventually all of this should be replaced
* with a global device allocator API.
*
* But for now this works as on all supported systems there will
* be only one group for all instances.
*/
static DEFINE_MUTEX(rvin_group_lock);
static struct rvin_group *rvin_group_data;
static void rvin_group_cleanup(struct rvin_group *group)
{
media_device_unregister(&group->mdev);
media_device_cleanup(&group->mdev);
mutex_destroy(&group->lock);
}
static int rvin_group_init(struct rvin_group *group, struct rvin_dev *vin)
{
struct media_device *mdev = &group->mdev;
const struct of_device_id *match;
struct device_node *np;
int ret;
mutex_init(&group->lock);
/* Count number of VINs in the system */
group->count = 0;
for_each_matching_node(np, vin->dev->driver->of_match_table)
if (of_device_is_available(np))
group->count++;
vin_dbg(vin, "found %u enabled VIN's in DT", group->count);
mdev->dev = vin->dev;
mdev->ops = &rvin_media_ops;
match = of_match_node(vin->dev->driver->of_match_table,
vin->dev->of_node);
strlcpy(mdev->driver_name, KBUILD_MODNAME, sizeof(mdev->driver_name));
strlcpy(mdev->model, match->compatible, sizeof(mdev->model));
snprintf(mdev->bus_info, sizeof(mdev->bus_info), "platform:%s",
dev_name(mdev->dev));
media_device_init(mdev);
ret = media_device_register(&group->mdev);
if (ret)
rvin_group_cleanup(group);
return ret;
}
static void rvin_group_release(struct kref *kref)
{
struct rvin_group *group =
container_of(kref, struct rvin_group, refcount);
mutex_lock(&rvin_group_lock);
rvin_group_data = NULL;
rvin_group_cleanup(group);
kfree(group);
mutex_unlock(&rvin_group_lock);
}
static int rvin_group_get(struct rvin_dev *vin)
{
struct rvin_group *group;
u32 id;
int ret;
/* Make sure VIN id is present and sane */
ret = of_property_read_u32(vin->dev->of_node, "renesas,id", &id);
if (ret) {
vin_err(vin, "%pOF: No renesas,id property found\n",
vin->dev->of_node);
return -EINVAL;
}
if (id >= RCAR_VIN_NUM) {
vin_err(vin, "%pOF: Invalid renesas,id '%u'\n",
vin->dev->of_node, id);
return -EINVAL;
}
/* Join or create a VIN group */
mutex_lock(&rvin_group_lock);
if (rvin_group_data) {
group = rvin_group_data;
kref_get(&group->refcount);
} else {
group = kzalloc(sizeof(*group), GFP_KERNEL);
if (!group) {
ret = -ENOMEM;
goto err_group;
}
ret = rvin_group_init(group, vin);
if (ret) {
kfree(group);
vin_err(vin, "Failed to initialize group\n");
goto err_group;
}
kref_init(&group->refcount);
rvin_group_data = group;
}
mutex_unlock(&rvin_group_lock);
/* Add VIN to group */
mutex_lock(&group->lock);
if (group->vin[id]) {
vin_err(vin, "Duplicate renesas,id property value %u\n", id);
mutex_unlock(&group->lock);
kref_put(&group->refcount, rvin_group_release);
return -EINVAL;
}
group->vin[id] = vin;
vin->id = id;
vin->group = group;
vin->v4l2_dev.mdev = &group->mdev;
mutex_unlock(&group->lock);
return 0;
err_group:
mutex_unlock(&rvin_group_lock);
return ret;
}
static void rvin_group_put(struct rvin_dev *vin)
{
mutex_lock(&vin->group->lock);
vin->group = NULL;
vin->v4l2_dev.mdev = NULL;
if (WARN_ON(vin->group->vin[vin->id] != vin))
goto out;
vin->group->vin[vin->id] = NULL;
out:
mutex_unlock(&vin->group->lock);
kref_put(&vin->group->refcount, rvin_group_release);
}
/* -----------------------------------------------------------------------------
* Async notifier
*/
#define notifier_to_vin(n) container_of(n, struct rvin_dev, notifier)
static int rvin_find_pad(struct v4l2_subdev *sd, int direction)
{
unsigned int pad;
if (sd->entity.num_pads <= 1)
return 0;
for (pad = 0; pad < sd->entity.num_pads; pad++)
if (sd->entity.pads[pad].flags & direction)
return pad;
return -EINVAL;
}
/* -----------------------------------------------------------------------------
* Digital async notifier
*/
/* The vin lock should be held when calling the subdevice attach and detach */
static int rvin_digital_subdevice_attach(struct rvin_dev *vin,
struct v4l2_subdev *subdev)
{
struct v4l2_subdev_mbus_code_enum code = {
.which = V4L2_SUBDEV_FORMAT_ACTIVE,
};
int ret;
/* Find source and sink pad of remote subdevice */
ret = rvin_find_pad(subdev, MEDIA_PAD_FL_SOURCE);
if (ret < 0)
return ret;
vin->digital->source_pad = ret;
ret = rvin_find_pad(subdev, MEDIA_PAD_FL_SINK);
vin->digital->sink_pad = ret < 0 ? 0 : ret;
/* Find compatible subdevices mbus format */
vin->mbus_code = 0;
code.index = 0;
code.pad = vin->digital->source_pad;
while (!vin->mbus_code &&
!v4l2_subdev_call(subdev, pad, enum_mbus_code, NULL, &code)) {
code.index++;
switch (code.code) {
case MEDIA_BUS_FMT_YUYV8_1X16:
case MEDIA_BUS_FMT_UYVY8_2X8:
case MEDIA_BUS_FMT_UYVY10_2X10:
case MEDIA_BUS_FMT_RGB888_1X24:
vin->mbus_code = code.code;
vin_dbg(vin, "Found media bus format for %s: %d\n",
subdev->name, vin->mbus_code);
break;
default:
break;
}
}
if (!vin->mbus_code) {
vin_err(vin, "Unsupported media bus format for %s\n",
subdev->name);
return -EINVAL;
}
/* Read tvnorms */
ret = v4l2_subdev_call(subdev, video, g_tvnorms, &vin->vdev.tvnorms);
if (ret < 0 && ret != -ENOIOCTLCMD && ret != -ENODEV)
return ret;
/* Read standard */
vin->std = V4L2_STD_UNKNOWN;
ret = v4l2_subdev_call(subdev, video, g_std, &vin->std);
if (ret < 0 && ret != -ENOIOCTLCMD)
return ret;
/* Add the controls */
ret = v4l2_ctrl_handler_init(&vin->ctrl_handler, 16);
if (ret < 0)
return ret;
ret = v4l2_ctrl_add_handler(&vin->ctrl_handler, subdev->ctrl_handler,
NULL);
if (ret < 0) {
v4l2_ctrl_handler_free(&vin->ctrl_handler);
return ret;
}
vin->vdev.ctrl_handler = &vin->ctrl_handler;
vin->digital->subdev = subdev;
return 0;
}
static void rvin_digital_subdevice_detach(struct rvin_dev *vin)
{
rvin_v4l2_unregister(vin);
v4l2_ctrl_handler_free(&vin->ctrl_handler);
vin->vdev.ctrl_handler = NULL;
vin->digital->subdev = NULL;
}
static int rvin_digital_notify_complete(struct v4l2_async_notifier *notifier)
{
struct rvin_dev *vin = notifier_to_vin(notifier);
int ret;
ret = v4l2_device_register_subdev_nodes(&vin->v4l2_dev);
if (ret < 0) {
vin_err(vin, "Failed to register subdev nodes\n");
return ret;
}
return rvin_v4l2_register(vin);
}
static void rvin_digital_notify_unbind(struct v4l2_async_notifier *notifier,
struct v4l2_subdev *subdev,
struct v4l2_async_subdev *asd)
{
struct rvin_dev *vin = notifier_to_vin(notifier);
vin_dbg(vin, "unbind digital subdev %s\n", subdev->name);
mutex_lock(&vin->lock);
rvin_digital_subdevice_detach(vin);
mutex_unlock(&vin->lock);
}
static int rvin_digital_notify_bound(struct v4l2_async_notifier *notifier,
struct v4l2_subdev *subdev,
struct v4l2_async_subdev *asd)
{
struct rvin_dev *vin = notifier_to_vin(notifier);
int ret;
mutex_lock(&vin->lock);
ret = rvin_digital_subdevice_attach(vin, subdev);
mutex_unlock(&vin->lock);
if (ret)
return ret;
v4l2_set_subdev_hostdata(subdev, vin);
vin_dbg(vin, "bound subdev %s source pad: %u sink pad: %u\n",
subdev->name, vin->digital->source_pad,
vin->digital->sink_pad);
return 0;
}
static const struct v4l2_async_notifier_operations rvin_digital_notify_ops = {
.bound = rvin_digital_notify_bound,
.unbind = rvin_digital_notify_unbind,
.complete = rvin_digital_notify_complete,
};
static int rvin_digital_parse_v4l2(struct device *dev,
struct v4l2_fwnode_endpoint *vep,
struct v4l2_async_subdev *asd)
{
struct rvin_dev *vin = dev_get_drvdata(dev);
struct rvin_graph_entity *rvge =
container_of(asd, struct rvin_graph_entity, asd);
if (vep->base.port || vep->base.id)
return -ENOTCONN;
vin->mbus_cfg.type = vep->bus_type;
switch (vin->mbus_cfg.type) {
case V4L2_MBUS_PARALLEL:
vin_dbg(vin, "Found PARALLEL media bus\n");
vin->mbus_cfg.flags = vep->bus.parallel.flags;
break;
case V4L2_MBUS_BT656:
vin_dbg(vin, "Found BT656 media bus\n");
vin->mbus_cfg.flags = 0;
break;
default:
vin_err(vin, "Unknown media bus type\n");
return -EINVAL;
}
vin->digital = rvge;
return 0;
}
static int rvin_digital_graph_init(struct rvin_dev *vin)
{
int ret;
ret = v4l2_async_notifier_parse_fwnode_endpoints(
vin->dev, &vin->notifier,
sizeof(struct rvin_graph_entity), rvin_digital_parse_v4l2);
if (ret)
return ret;
if (!vin->digital)
return -ENODEV;
vin_dbg(vin, "Found digital subdevice %pOF\n",
to_of_node(vin->digital->asd.match.fwnode));
vin->notifier.ops = &rvin_digital_notify_ops;
ret = v4l2_async_notifier_register(&vin->v4l2_dev, &vin->notifier);
if (ret < 0) {
vin_err(vin, "Notifier registration failed\n");
return ret;
}
return 0;
}
/* -----------------------------------------------------------------------------
* Group async notifier
*/
static int rvin_group_notify_complete(struct v4l2_async_notifier *notifier)
{
struct rvin_dev *vin = notifier_to_vin(notifier);
const struct rvin_group_route *route;
unsigned int i;
int ret;
ret = v4l2_device_register_subdev_nodes(&vin->v4l2_dev);
if (ret) {
vin_err(vin, "Failed to register subdev nodes\n");
return ret;
}
/* Register all video nodes for the group. */
for (i = 0; i < RCAR_VIN_NUM; i++) {
if (vin->group->vin[i]) {
ret = rvin_v4l2_register(vin->group->vin[i]);
if (ret)
return ret;
}
}
/* Create all media device links between VINs and CSI-2's. */
mutex_lock(&vin->group->lock);
for (route = vin->info->routes; route->mask; route++) {
struct media_pad *source_pad, *sink_pad;
struct media_entity *source, *sink;
unsigned int source_idx;
/* Check that VIN is part of the group. */
if (!vin->group->vin[route->vin])
continue;
/* Check that VIN' master is part of the group. */
if (!vin->group->vin[rvin_group_id_to_master(route->vin)])
continue;
/* Check that CSI-2 is part of the group. */
if (!vin->group->csi[route->csi].subdev)
continue;
source = &vin->group->csi[route->csi].subdev->entity;
source_idx = rvin_group_csi_channel_to_pad(route->channel);
source_pad = &source->pads[source_idx];
sink = &vin->group->vin[route->vin]->vdev.entity;
sink_pad = &sink->pads[0];
/* Skip if link already exists. */
if (media_entity_find_link(source_pad, sink_pad))
continue;
ret = media_create_pad_link(source, source_idx, sink, 0, 0);
if (ret) {
vin_err(vin, "Error adding link from %s to %s\n",
source->name, sink->name);
break;
}
}
mutex_unlock(&vin->group->lock);
return ret;
}
static void rvin_group_notify_unbind(struct v4l2_async_notifier *notifier,
struct v4l2_subdev *subdev,
struct v4l2_async_subdev *asd)
{
struct rvin_dev *vin = notifier_to_vin(notifier);
unsigned int i;
for (i = 0; i < RCAR_VIN_NUM; i++)
if (vin->group->vin[i])
rvin_v4l2_unregister(vin->group->vin[i]);
mutex_lock(&vin->group->lock);
for (i = 0; i < RVIN_CSI_MAX; i++) {
if (vin->group->csi[i].fwnode != asd->match.fwnode)
continue;
vin->group->csi[i].subdev = NULL;
vin_dbg(vin, "Unbind CSI-2 %s from slot %u\n", subdev->name, i);
break;
}
mutex_unlock(&vin->group->lock);
}
static int rvin_group_notify_bound(struct v4l2_async_notifier *notifier,
struct v4l2_subdev *subdev,
struct v4l2_async_subdev *asd)
{
struct rvin_dev *vin = notifier_to_vin(notifier);
unsigned int i;
mutex_lock(&vin->group->lock);
for (i = 0; i < RVIN_CSI_MAX; i++) {
if (vin->group->csi[i].fwnode != asd->match.fwnode)
continue;
vin->group->csi[i].subdev = subdev;
vin_dbg(vin, "Bound CSI-2 %s to slot %u\n", subdev->name, i);
break;
}
mutex_unlock(&vin->group->lock);
return 0;
}
static const struct v4l2_async_notifier_operations rvin_group_notify_ops = {
.bound = rvin_group_notify_bound,
.unbind = rvin_group_notify_unbind,
.complete = rvin_group_notify_complete,
};
static int rvin_mc_parse_of_endpoint(struct device *dev,
struct v4l2_fwnode_endpoint *vep,
struct v4l2_async_subdev *asd)
{
struct rvin_dev *vin = dev_get_drvdata(dev);
if (vep->base.port != 1 || vep->base.id >= RVIN_CSI_MAX)
return -EINVAL;
if (!of_device_is_available(to_of_node(asd->match.fwnode))) {
vin_dbg(vin, "OF device %pOF disabled, ignoring\n",
to_of_node(asd->match.fwnode));
return -ENOTCONN;
}
if (vin->group->csi[vep->base.id].fwnode) {
vin_dbg(vin, "OF device %pOF already handled\n",
to_of_node(asd->match.fwnode));
return -ENOTCONN;
}
vin->group->csi[vep->base.id].fwnode = asd->match.fwnode;
vin_dbg(vin, "Add group OF device %pOF to slot %u\n",
to_of_node(asd->match.fwnode), vep->base.id);
return 0;
}
static int rvin_mc_parse_of_graph(struct rvin_dev *vin)
{
unsigned int count = 0;
unsigned int i;
int ret;
mutex_lock(&vin->group->lock);
/* If there already is a notifier something has gone wrong, bail out. */
if (WARN_ON(vin->group->notifier)) {
mutex_unlock(&vin->group->lock);
return -EINVAL;
}
/* If not all VIN's are registered don't register the notifier. */
for (i = 0; i < RCAR_VIN_NUM; i++)
if (vin->group->vin[i])
count++;
if (vin->group->count != count) {
mutex_unlock(&vin->group->lock);
return 0;
}
/*
* Have all VIN's look for subdevices. Some subdevices will overlap
* but the parser function can handle it, so each subdevice will
* only be registered once with the notifier.
*/
vin->group->notifier = &vin->notifier;
for (i = 0; i < RCAR_VIN_NUM; i++) {
if (!vin->group->vin[i])
continue;
ret = v4l2_async_notifier_parse_fwnode_endpoints_by_port(
vin->group->vin[i]->dev, vin->group->notifier,
sizeof(struct v4l2_async_subdev), 1,
rvin_mc_parse_of_endpoint);
if (ret) {
mutex_unlock(&vin->group->lock);
return ret;
}
}
mutex_unlock(&vin->group->lock);
vin->group->notifier->ops = &rvin_group_notify_ops;
ret = v4l2_async_notifier_register(&vin->v4l2_dev, &vin->notifier);
if (ret < 0) {
vin_err(vin, "Notifier registration failed\n");
return ret;
}
return 0;
}
static int rvin_mc_init(struct rvin_dev *vin)
{
int ret;
/* All our sources are CSI-2 */
vin->mbus_cfg.type = V4L2_MBUS_CSI2;
vin->mbus_cfg.flags = 0;
vin->pad.flags = MEDIA_PAD_FL_SINK;
ret = media_entity_pads_init(&vin->vdev.entity, 1, &vin->pad);
if (ret)
return ret;
ret = rvin_group_get(vin);
if (ret)
return ret;
ret = rvin_mc_parse_of_graph(vin);
if (ret)
rvin_group_put(vin);
return ret;
}
/* -----------------------------------------------------------------------------
* Platform Device Driver
*/
static const struct rvin_info rcar_info_h1 = {
.model = RCAR_H1,
.use_mc = false,
.max_width = 2048,
.max_height = 2048,
};
static const struct rvin_info rcar_info_m1 = {
.model = RCAR_M1,
.use_mc = false,
.max_width = 2048,
.max_height = 2048,
};
static const struct rvin_info rcar_info_gen2 = {
.model = RCAR_GEN2,
.use_mc = false,
.max_width = 2048,
.max_height = 2048,
};
static const struct of_device_id rvin_of_id_table[] = {
{
.compatible = "renesas,vin-r8a7778",
.data = &rcar_info_m1,
},
{
.compatible = "renesas,vin-r8a7779",
.data = &rcar_info_h1,
},
{
.compatible = "renesas,vin-r8a7790",
.data = &rcar_info_gen2,
},
{
.compatible = "renesas,vin-r8a7791",
.data = &rcar_info_gen2,
},
{
.compatible = "renesas,vin-r8a7793",
.data = &rcar_info_gen2,
},
{
.compatible = "renesas,vin-r8a7794",
.data = &rcar_info_gen2,
},
{
.compatible = "renesas,rcar-gen2-vin",
.data = &rcar_info_gen2,
},
{ /* Sentinel */ },
};
MODULE_DEVICE_TABLE(of, rvin_of_id_table);
static int rcar_vin_probe(struct platform_device *pdev)
{
struct rvin_dev *vin;
struct resource *mem;
int irq, ret;
vin = devm_kzalloc(&pdev->dev, sizeof(*vin), GFP_KERNEL);
if (!vin)
return -ENOMEM;
vin->dev = &pdev->dev;
vin->info = of_device_get_match_data(&pdev->dev);
mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (mem == NULL)
return -EINVAL;
vin->base = devm_ioremap_resource(vin->dev, mem);
if (IS_ERR(vin->base))
return PTR_ERR(vin->base);
irq = platform_get_irq(pdev, 0);
if (irq < 0)
return irq;
ret = rvin_dma_register(vin, irq);
if (ret)
return ret;
platform_set_drvdata(pdev, vin);
if (vin->info->use_mc)
ret = rvin_mc_init(vin);
else
ret = rvin_digital_graph_init(vin);
if (ret < 0)
goto error;
pm_suspend_ignore_children(&pdev->dev, true);
pm_runtime_enable(&pdev->dev);
return 0;
error:
rvin_dma_unregister(vin);
v4l2_async_notifier_cleanup(&vin->notifier);
return ret;
}
static int rcar_vin_remove(struct platform_device *pdev)
{
struct rvin_dev *vin = platform_get_drvdata(pdev);
pm_runtime_disable(&pdev->dev);
rvin_v4l2_unregister(vin);
v4l2_async_notifier_unregister(&vin->notifier);
v4l2_async_notifier_cleanup(&vin->notifier);
if (vin->info->use_mc) {
mutex_lock(&vin->group->lock);
if (vin->group->notifier == &vin->notifier)
vin->group->notifier = NULL;
mutex_unlock(&vin->group->lock);
rvin_group_put(vin);
} else {
v4l2_ctrl_handler_free(&vin->ctrl_handler);
}
rvin_dma_unregister(vin);
return 0;
}
static struct platform_driver rcar_vin_driver = {
.driver = {
.name = "rcar-vin",
.of_match_table = rvin_of_id_table,
},
.probe = rcar_vin_probe,
.remove = rcar_vin_remove,
};
module_platform_driver(rcar_vin_driver);
MODULE_AUTHOR("Niklas Söderlund <niklas.soderlund@ragnatech.se>");
MODULE_DESCRIPTION("Renesas R-Car VIN camera host driver");
MODULE_LICENSE("GPL v2");
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