[deliverable/linux.git] / drivers / media / platform / vsp1 / vsp1_drv.c

/*
 * 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/platform_device.h>
#include <linux/videodev2.h>

#include "vsp1.h"
#include "vsp1_bru.h"
#include "vsp1_hsit.h"
#include "vsp1_lif.h"
#include "vsp1_lut.h"
#include "vsp1_rwpf.h"
#include "vsp1_sru.h"
#include "vsp1_uds.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;

	for (i = 0; i < vsp1->pdata.wpf_count; ++i) {
		struct vsp1_rwpf *wpf = vsp1->wpf[i];
		struct vsp1_pipeline *pipe;
		u32 status;

		if (wpf == NULL)
			continue;

		pipe = to_vsp1_pipeline(&wpf->entity.subdev.entity);
		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_FRE) {
			vsp1_pipeline_frame_end(pipe);
			ret = IRQ_HANDLED;
		}
	}

	return ret;
}

/* -----------------------------------------------------------------------------
 * Entities
 */

/*
 * vsp1_create_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_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_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 void vsp1_destroy_entities(struct vsp1_device *vsp1)
{
	struct vsp1_entity *entity;
	struct vsp1_entity *next;

	list_for_each_entry_safe(entity, next, &vsp1->entities, list_dev) {
		list_del(&entity->list_dev);
		vsp1_entity_destroy(entity);
	}

	v4l2_device_unregister(&vsp1->v4l2_dev);
	media_device_unregister(&vsp1->media_dev);
	media_device_cleanup(&vsp1->media_dev);
}

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;
	strlcpy(mdev->model, "VSP1", sizeof(mdev->model));
	snprintf(mdev->bus_info, sizeof(mdev->bus_info), "platform:%s",
		 dev_name(mdev->dev));
	media_device_init(mdev);

	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. */
	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);

	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->pdata.features & VSP1_HAS_LIF) {
		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->pdata.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->pdata.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->pdata.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->pdata.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->pdata.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);
	}

	/* 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. */
	list_for_each_entry(entity, &vsp1->entities, list_dev) {
		if (entity->type == VSP1_ENTITY_LIF) {
			ret = vsp1_wpf_create_links(vsp1, entity);
			if (ret < 0)
				goto done;
		} else if (entity->type == VSP1_ENTITY_RPF) {
			ret = vsp1_rpf_create_links(vsp1, entity);
			if (ret < 0)
				goto done;
		} else {
			ret = vsp1_create_links(vsp1, entity);
			if (ret < 0)
				goto done;
		}
	}

	if (vsp1->pdata.features & VSP1_HAS_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;
	}

	ret = v4l2_device_register_subdev_nodes(&vsp1->v4l2_dev);
	if (ret < 0)
		goto done;

	ret = media_device_register(mdev);

done:
	if (ret < 0)
		vsp1_destroy_entities(vsp1);

	return ret;
}

static int vsp1_device_init(struct vsp1_device *vsp1)
{
	unsigned int i;
	u32 status;

	/* Reset any channel that might be running. */
	status = vsp1_read(vsp1, VI6_STATUS);

	for (i = 0; i < vsp1->pdata.wpf_count; ++i) {
		unsigned int timeout;

		if (!(status & VI6_STATUS_SYS_ACT(i)))
			continue;

		vsp1_write(vsp1, VI6_SRESET, VI6_SRESET_SRTS(i));
		for (timeout = 10; timeout > 0; --timeout) {
			status = vsp1_read(vsp1, VI6_STATUS);
			if (!(status & VI6_STATUS_SYS_ACT(i)))
				break;

			usleep_range(1000, 2000);
		}

		if (!timeout) {
			dev_err(vsp1->dev, "failed to reset wpf.%u\n", i);
			return -ETIMEDOUT;
		}
	}

	vsp1_write(vsp1, VI6_CLK_DCSWT, (8 << VI6_CLK_DCSWT_CSTPW_SHIFT) |
		   (8 << VI6_CLK_DCSWT_CSTRW_SHIFT));

	for (i = 0; i < vsp1->pdata.rpf_count; ++i)
		vsp1_write(vsp1, VI6_DPR_RPF_ROUTE(i), VI6_DPR_NODE_UNUSED);

	for (i = 0; i < vsp1->pdata.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));

	return 0;
}

/*
 * vsp1_device_get - Acquire the VSP1 device
 *
 * Increment the VSP1 reference count and initialize the device if the first
 * reference is taken.
 *
 * Return 0 on success or a negative error code otherwise.
 */
int vsp1_device_get(struct vsp1_device *vsp1)
{
	int ret = 0;

	mutex_lock(&vsp1->lock);
	if (vsp1->ref_count > 0)
		goto done;

	ret = clk_prepare_enable(vsp1->clock);
	if (ret < 0)
		goto done;

	ret = vsp1_device_init(vsp1);
	if (ret < 0) {
		clk_disable_unprepare(vsp1->clock);
		goto done;
	}

done:
	if (!ret)
		vsp1->ref_count++;

	mutex_unlock(&vsp1->lock);
	return ret;
}

/*
 * 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)
{
	mutex_lock(&vsp1->lock);

	if (--vsp1->ref_count == 0)
		clk_disable_unprepare(vsp1->clock);

	mutex_unlock(&vsp1->lock);
}

/* -----------------------------------------------------------------------------
 * Power Management
 */

#ifdef CONFIG_PM_SLEEP
static int vsp1_pm_suspend(struct device *dev)
{
	struct vsp1_device *vsp1 = dev_get_drvdata(dev);

	WARN_ON(mutex_is_locked(&vsp1->lock));

	if (vsp1->ref_count == 0)
		return 0;

	vsp1_pipelines_suspend(vsp1);

	clk_disable_unprepare(vsp1->clock);

	return 0;
}

static int vsp1_pm_resume(struct device *dev)
{
	struct vsp1_device *vsp1 = dev_get_drvdata(dev);

	WARN_ON(mutex_is_locked(&vsp1->lock));

	if (vsp1->ref_count == 0)
		return 0;

	clk_prepare_enable(vsp1->clock);

	vsp1_pipelines_resume(vsp1);

	return 0;
}
#endif

static const struct dev_pm_ops vsp1_pm_ops = {
	SET_SYSTEM_SLEEP_PM_OPS(vsp1_pm_suspend, vsp1_pm_resume)
};

/* -----------------------------------------------------------------------------
 * Platform Driver
 */

static int vsp1_parse_dt(struct vsp1_device *vsp1)
{
	struct device_node *np = vsp1->dev->of_node;
	struct vsp1_platform_data *pdata = &vsp1->pdata;

	if (of_property_read_bool(np, "renesas,has-lif"))
		pdata->features |= VSP1_HAS_LIF;
	if (of_property_read_bool(np, "renesas,has-lut"))
		pdata->features |= VSP1_HAS_LUT;
	if (of_property_read_bool(np, "renesas,has-sru"))
		pdata->features |= VSP1_HAS_SRU;

	of_property_read_u32(np, "renesas,#rpf", &pdata->rpf_count);
	of_property_read_u32(np, "renesas,#uds", &pdata->uds_count);
	of_property_read_u32(np, "renesas,#wpf", &pdata->wpf_count);

	if (pdata->rpf_count <= 0 || pdata->rpf_count > VSP1_MAX_RPF) {
		dev_err(vsp1->dev, "invalid number of RPF (%u)\n",
			pdata->rpf_count);
		return -EINVAL;
	}

	if (pdata->uds_count <= 0 || pdata->uds_count > VSP1_MAX_UDS) {
		dev_err(vsp1->dev, "invalid number of UDS (%u)\n",
			pdata->uds_count);
		return -EINVAL;
	}

	if (pdata->wpf_count <= 0 || pdata->wpf_count > VSP1_MAX_WPF) {
		dev_err(vsp1->dev, "invalid number of WPF (%u)\n",
			pdata->wpf_count);
		return -EINVAL;
	}

	return 0;
}

static int vsp1_probe(struct platform_device *pdev)
{
	struct vsp1_device *vsp1;
	struct resource *irq;
	struct resource *io;
	int ret;

	vsp1 = devm_kzalloc(&pdev->dev, sizeof(*vsp1), GFP_KERNEL);
	if (vsp1 == NULL)
		return -ENOMEM;

	vsp1->dev = &pdev->dev;
	mutex_init(&vsp1->lock);
	INIT_LIST_HEAD(&vsp1->entities);

	ret = vsp1_parse_dt(vsp1);
	if (ret < 0)
		return ret;

	/* I/O, IRQ and clock resources */
	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);

	vsp1->clock = devm_clk_get(&pdev->dev, NULL);
	if (IS_ERR(vsp1->clock)) {
		dev_err(&pdev->dev, "failed to get clock\n");
		return PTR_ERR(vsp1->clock);
	}

	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;
	}

	/* Instanciate entities */
	ret = vsp1_create_entities(vsp1);
	if (ret < 0) {
		dev_err(&pdev->dev, "failed to create entities\n");
		return ret;
	}

	platform_set_drvdata(pdev, vsp1);

	return 0;
}

static int vsp1_remove(struct platform_device *pdev)
{
	struct vsp1_device *vsp1 = platform_get_drvdata(pdev);

	vsp1_destroy_entities(vsp1);

	return 0;
}

static const struct of_device_id vsp1_of_match[] = {
	{ .compatible = "renesas,vsp1" },
	{ },
};

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");
Commit	Line	Data
26e0ca22 LP	1	/*
	2	* vsp1_drv.c -- R-Car VSP1 Driver
	3	*
139c9286	4	* Copyright (C) 2013-2015 Renesas Electronics Corporation
26e0ca22 LP	5	*
	6	* Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
	7	*
	8	* This program is free software; you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License as published by
	10	* the Free Software Foundation; either version 2 of the License, or
	11	* (at your option) any later version.
	12	*/
	13
	14	#include <linux/clk.h>
	15	#include <linux/delay.h>
	16	#include <linux/device.h>
	17	#include <linux/interrupt.h>
	18	#include <linux/module.h>
0b82fb95	19	#include <linux/of.h>
26e0ca22 LP	20	#include <linux/platform_device.h>
	21	#include <linux/videodev2.h>
	22
	23	#include "vsp1.h"
629bb6d4	24	#include "vsp1_bru.h"
5cdf5741	25	#include "vsp1_hsit.h"
26e0ca22	26	#include "vsp1_lif.h"
989af883	27	#include "vsp1_lut.h"
26e0ca22	28	#include "vsp1_rwpf.h"
a626e64e	29	#include "vsp1_sru.h"
26e0ca22 LP	30	#include "vsp1_uds.h"
	31
	32	/* -----------------------------------------------------------------------------
	33	* Interrupt Handling
	34	*/
	35
	36	static irqreturn_t vsp1_irq_handler(int irq, void *data)
	37	{
	38	u32 mask = VI6_WFP_IRQ_STA_DFE \| VI6_WFP_IRQ_STA_FRE;
	39	struct vsp1_device *vsp1 = data;
	40	irqreturn_t ret = IRQ_NONE;
	41	unsigned int i;
	42
32d17597	43	for (i = 0; i < vsp1->pdata.wpf_count; ++i) {
26e0ca22 LP	44	struct vsp1_rwpf *wpf = vsp1->wpf[i];
	45	struct vsp1_pipeline *pipe;
	46	u32 status;
	47
	48	if (wpf == NULL)
	49	continue;
	50
	51	pipe = to_vsp1_pipeline(&wpf->entity.subdev.entity);
	52	status = vsp1_read(vsp1, VI6_WPF_IRQ_STA(i));
	53	vsp1_write(vsp1, VI6_WPF_IRQ_STA(i), ~status & mask);
	54
	55	if (status & VI6_WFP_IRQ_STA_FRE) {
	56	vsp1_pipeline_frame_end(pipe);
	57	ret = IRQ_HANDLED;
	58	}
	59	}
	60
	61	return ret;
	62	}
	63
	64	/* -----------------------------------------------------------------------------
	65	* Entities
	66	*/
	67
	68	/*
	69	* vsp1_create_links - Create links from all sources to the given sink
	70	*
	71	* This function creates media links from all valid sources to the given sink
	72	* pad. Links that would be invalid according to the VSP1 hardware capabilities
	73	* are skipped. Those include all links
	74	*
	75	* - from a UDS to a UDS (UDS entities can't be chained)
	76	* - from an entity to itself (no loops are allowed)
	77	*/
	78	static int vsp1_create_links(struct vsp1_device vsp1, struct vsp1_entity sink)
	79	{
	80	struct media_entity *entity = &sink->subdev.entity;
	81	struct vsp1_entity *source;
	82	unsigned int pad;
	83	int ret;
	84
	85	list_for_each_entry(source, &vsp1->entities, list_dev) {
	86	u32 flags;
	87
	88	if (source->type == sink->type)
	89	continue;
	90
	91	if (source->type == VSP1_ENTITY_LIF \|\|
	92	source->type == VSP1_ENTITY_WPF)
	93	continue;
	94
	95	flags = source->type == VSP1_ENTITY_RPF &&
	96	sink->type == VSP1_ENTITY_WPF &&
	97	source->index == sink->index
	98	? MEDIA_LNK_FL_ENABLED : 0;
	99
	100	for (pad = 0; pad < entity->num_pads; ++pad) {
	101	if (!(entity->pads[pad].flags & MEDIA_PAD_FL_SINK))
	102	continue;
	103
8df00a15	104	ret = media_create_pad_link(&source->subdev.entity,
26e0ca22 LP	105	source->source_pad,
	106	entity, pad, flags);
	107	if (ret < 0)
	108	return ret;
db32eb6c KM	109
	110	if (flags & MEDIA_LNK_FL_ENABLED)
	111	source->sink = entity;
26e0ca22 LP	112	}
	113	}
	114
	115	return 0;
	116	}
	117
	118	static void vsp1_destroy_entities(struct vsp1_device *vsp1)
	119	{
	120	struct vsp1_entity *entity;
	121	struct vsp1_entity *next;
	122
	123	list_for_each_entry_safe(entity, next, &vsp1->entities, list_dev) {
	124	list_del(&entity->list_dev);
	125	vsp1_entity_destroy(entity);
	126	}
	127
	128	v4l2_device_unregister(&vsp1->v4l2_dev);
	129	media_device_unregister(&vsp1->media_dev);
9832e155	130	media_device_cleanup(&vsp1->media_dev);
26e0ca22 LP	131	}
	132
	133	static int vsp1_create_entities(struct vsp1_device *vsp1)
	134	{
	135	struct media_device *mdev = &vsp1->media_dev;
	136	struct v4l2_device *vdev = &vsp1->v4l2_dev;
	137	struct vsp1_entity *entity;
	138	unsigned int i;
	139	int ret;
	140
	141	mdev->dev = vsp1->dev;
	142	strlcpy(mdev->model, "VSP1", sizeof(mdev->model));
10d79b99 LP	143	snprintf(mdev->bus_info, sizeof(mdev->bus_info), "platform:%s",
10d79b99 LP	144	dev_name(mdev->dev));
9832e155	145	media_device_init(mdev);
26e0ca22 LP	146
	147	vdev->mdev = mdev;
	148	ret = v4l2_device_register(vsp1->dev, vdev);
	149	if (ret < 0) {
	150	dev_err(vsp1->dev, "V4L2 device registration failed (%d)\n",
	151	ret);
	152	goto done;
	153	}
	154
	155	/* Instantiate all the entities. */
629bb6d4 LP	156	vsp1->bru = vsp1_bru_create(vsp1);
	157	if (IS_ERR(vsp1->bru)) {
	158	ret = PTR_ERR(vsp1->bru);
	159	goto done;
	160	}
	161
	162	list_add_tail(&vsp1->bru->entity.list_dev, &vsp1->entities);
	163
5cdf5741 LP	164	vsp1->hsi = vsp1_hsit_create(vsp1, true);
	165	if (IS_ERR(vsp1->hsi)) {
	166	ret = PTR_ERR(vsp1->hsi);
	167	goto done;
	168	}
	169
	170	list_add_tail(&vsp1->hsi->entity.list_dev, &vsp1->entities);
	171
	172	vsp1->hst = vsp1_hsit_create(vsp1, false);
	173	if (IS_ERR(vsp1->hst)) {
	174	ret = PTR_ERR(vsp1->hst);
	175	goto done;
	176	}
	177
	178	list_add_tail(&vsp1->hst->entity.list_dev, &vsp1->entities);
	179
32d17597	180	if (vsp1->pdata.features & VSP1_HAS_LIF) {
26e0ca22 LP	181	vsp1->lif = vsp1_lif_create(vsp1);
	182	if (IS_ERR(vsp1->lif)) {
	183	ret = PTR_ERR(vsp1->lif);
	184	goto done;
	185	}
	186
	187	list_add_tail(&vsp1->lif->entity.list_dev, &vsp1->entities);
	188	}
	189
32d17597	190	if (vsp1->pdata.features & VSP1_HAS_LUT) {
989af883 LP	191	vsp1->lut = vsp1_lut_create(vsp1);
	192	if (IS_ERR(vsp1->lut)) {
	193	ret = PTR_ERR(vsp1->lut);
	194	goto done;
	195	}
	196
	197	list_add_tail(&vsp1->lut->entity.list_dev, &vsp1->entities);
	198	}
	199
32d17597	200	for (i = 0; i < vsp1->pdata.rpf_count; ++i) {
26e0ca22 LP	201	struct vsp1_rwpf *rpf;
	202
	203	rpf = vsp1_rpf_create(vsp1, i);
	204	if (IS_ERR(rpf)) {
	205	ret = PTR_ERR(rpf);
	206	goto done;
	207	}
	208
	209	vsp1->rpf[i] = rpf;
	210	list_add_tail(&rpf->entity.list_dev, &vsp1->entities);
	211	}
	212
32d17597	213	if (vsp1->pdata.features & VSP1_HAS_SRU) {
a626e64e LP	214	vsp1->sru = vsp1_sru_create(vsp1);
	215	if (IS_ERR(vsp1->sru)) {
	216	ret = PTR_ERR(vsp1->sru);
	217	goto done;
	218	}
	219
	220	list_add_tail(&vsp1->sru->entity.list_dev, &vsp1->entities);
	221	}
	222
32d17597	223	for (i = 0; i < vsp1->pdata.uds_count; ++i) {
26e0ca22 LP	224	struct vsp1_uds *uds;
	225
	226	uds = vsp1_uds_create(vsp1, i);
	227	if (IS_ERR(uds)) {
	228	ret = PTR_ERR(uds);
	229	goto done;
	230	}
	231
	232	vsp1->uds[i] = uds;
	233	list_add_tail(&uds->entity.list_dev, &vsp1->entities);
	234	}
	235
32d17597	236	for (i = 0; i < vsp1->pdata.wpf_count; ++i) {
26e0ca22 LP	237	struct vsp1_rwpf *wpf;
	238
	239	wpf = vsp1_wpf_create(vsp1, i);
	240	if (IS_ERR(wpf)) {
	241	ret = PTR_ERR(wpf);
	242	goto done;
	243	}
	244
	245	vsp1->wpf[i] = wpf;
	246	list_add_tail(&wpf->entity.list_dev, &vsp1->entities);
	247	}
	248
7213fe7e JMC	249	/* Register all subdevs. */
	250	list_for_each_entry(entity, &vsp1->entities, list_dev) {
	251	ret = v4l2_device_register_subdev(&vsp1->v4l2_dev,
	252	&entity->subdev);
	253	if (ret < 0)
	254	goto done;
	255	}
	256
26e0ca22 LP	257	/* Create links. */
26e0ca22 LP	258	list_for_each_entry(entity, &vsp1->entities, list_dev) {
c7621b30	259	if (entity->type == VSP1_ENTITY_LIF) {
d8a2cf41	260	ret = vsp1_wpf_create_links(vsp1, entity);
c7621b30 JMC	261	if (ret < 0)
c7621b30 JMC	262	goto done;
1488eee3	263	} else if (entity->type == VSP1_ENTITY_RPF) {
d8a2cf41	264	ret = vsp1_rpf_create_links(vsp1, entity);
c7621b30 JMC	265	if (ret < 0)
c7621b30 JMC	266	goto done;
1488eee3 JMC	267	} else {
	268	ret = vsp1_create_links(vsp1, entity);
	269	if (ret < 0)
	270	goto done;
c7621b30	271	}
26e0ca22 LP	272	}
26e0ca22 LP	273
32d17597	274	if (vsp1->pdata.features & VSP1_HAS_LIF) {
8df00a15	275	ret = media_create_pad_link(
26e0ca22 LP	276	&vsp1->wpf[0]->entity.subdev.entity, RWPF_PAD_SOURCE,
	277	&vsp1->lif->entity.subdev.entity, LIF_PAD_SINK, 0);
	278	if (ret < 0)
	279	return ret;
	280	}
	281
26e0ca22	282	ret = v4l2_device_register_subdev_nodes(&vsp1->v4l2_dev);
9832e155 JMC	283	if (ret < 0)
	284	goto done;
	285
	286	ret = media_device_register(mdev);
26e0ca22 LP	287
	288	done:
	289	if (ret < 0)
	290	vsp1_destroy_entities(vsp1);
	291
	292	return ret;
	293	}
	294
	295	static int vsp1_device_init(struct vsp1_device *vsp1)
	296	{
	297	unsigned int i;
	298	u32 status;
	299
	300	/* Reset any channel that might be running. */
	301	status = vsp1_read(vsp1, VI6_STATUS);
	302
32d17597	303	for (i = 0; i < vsp1->pdata.wpf_count; ++i) {
26e0ca22 LP	304	unsigned int timeout;
	305
	306	if (!(status & VI6_STATUS_SYS_ACT(i)))
	307	continue;
	308
	309	vsp1_write(vsp1, VI6_SRESET, VI6_SRESET_SRTS(i));
	310	for (timeout = 10; timeout > 0; --timeout) {
	311	status = vsp1_read(vsp1, VI6_STATUS);
	312	if (!(status & VI6_STATUS_SYS_ACT(i)))
	313	break;
	314
	315	usleep_range(1000, 2000);
	316	}
	317
	318	if (!timeout) {
	319	dev_err(vsp1->dev, "failed to reset wpf.%u\n", i);
	320	return -ETIMEDOUT;
	321	}
	322	}
	323
	324	vsp1_write(vsp1, VI6_CLK_DCSWT, (8 << VI6_CLK_DCSWT_CSTPW_SHIFT) \|
	325	(8 << VI6_CLK_DCSWT_CSTRW_SHIFT));
	326
32d17597	327	for (i = 0; i < vsp1->pdata.rpf_count; ++i)
26e0ca22 LP	328	vsp1_write(vsp1, VI6_DPR_RPF_ROUTE(i), VI6_DPR_NODE_UNUSED);
26e0ca22 LP	329
32d17597	330	for (i = 0; i < vsp1->pdata.uds_count; ++i)
26e0ca22 LP	331	vsp1_write(vsp1, VI6_DPR_UDS_ROUTE(i), VI6_DPR_NODE_UNUSED);
	332
	333	vsp1_write(vsp1, VI6_DPR_SRU_ROUTE, VI6_DPR_NODE_UNUSED);
	334	vsp1_write(vsp1, VI6_DPR_LUT_ROUTE, VI6_DPR_NODE_UNUSED);
	335	vsp1_write(vsp1, VI6_DPR_CLU_ROUTE, VI6_DPR_NODE_UNUSED);
	336	vsp1_write(vsp1, VI6_DPR_HST_ROUTE, VI6_DPR_NODE_UNUSED);
	337	vsp1_write(vsp1, VI6_DPR_HSI_ROUTE, VI6_DPR_NODE_UNUSED);
	338	vsp1_write(vsp1, VI6_DPR_BRU_ROUTE, VI6_DPR_NODE_UNUSED);
	339
	340	vsp1_write(vsp1, VI6_DPR_HGO_SMPPT, (7 << VI6_DPR_SMPPT_TGW_SHIFT) \|
	341	(VI6_DPR_NODE_UNUSED << VI6_DPR_SMPPT_PT_SHIFT));
	342	vsp1_write(vsp1, VI6_DPR_HGT_SMPPT, (7 << VI6_DPR_SMPPT_TGW_SHIFT) \|
	343	(VI6_DPR_NODE_UNUSED << VI6_DPR_SMPPT_PT_SHIFT));
	344
	345	return 0;
	346	}
	347
	348	/*
	349	* vsp1_device_get - Acquire the VSP1 device
	350	*
	351	* Increment the VSP1 reference count and initialize the device if the first
	352	* reference is taken.
	353	*
4c16d6a0	354	* Return 0 on success or a negative error code otherwise.
26e0ca22	355	*/
4c16d6a0	356	int vsp1_device_get(struct vsp1_device *vsp1)
26e0ca22	357	{
4c16d6a0	358	int ret = 0;
26e0ca22 LP	359
	360	mutex_lock(&vsp1->lock);
	361	if (vsp1->ref_count > 0)
	362	goto done;
	363
4fc78784	364	ret = clk_prepare_enable(vsp1->clock);
4c16d6a0	365	if (ret < 0)
26e0ca22	366	goto done;
26e0ca22 LP	367
	368	ret = vsp1_device_init(vsp1);
	369	if (ret < 0) {
4fc78784	370	clk_disable_unprepare(vsp1->clock);
26e0ca22 LP	371	goto done;
	372	}
	373
	374	done:
4c16d6a0	375	if (!ret)
26e0ca22 LP	376	vsp1->ref_count++;
	377
	378	mutex_unlock(&vsp1->lock);
4c16d6a0	379	return ret;
26e0ca22 LP	380	}
	381
	382	/*
	383	* vsp1_device_put - Release the VSP1 device
	384	*
	385	* Decrement the VSP1 reference count and cleanup the device if the last
	386	* reference is released.
	387	*/
	388	void vsp1_device_put(struct vsp1_device *vsp1)
	389	{
	390	mutex_lock(&vsp1->lock);
	391
	392	if (--vsp1->ref_count == 0)
4fc78784	393	clk_disable_unprepare(vsp1->clock);
26e0ca22 LP	394
	395	mutex_unlock(&vsp1->lock);
	396	}
	397
	398	/* -----------------------------------------------------------------------------
	399	* Power Management
	400	*/
	401
	402	#ifdef CONFIG_PM_SLEEP
	403	static int vsp1_pm_suspend(struct device *dev)
	404	{
	405	struct vsp1_device *vsp1 = dev_get_drvdata(dev);
	406
	407	WARN_ON(mutex_is_locked(&vsp1->lock));
	408
	409	if (vsp1->ref_count == 0)
	410	return 0;
	411
139c9286 SF	412	vsp1_pipelines_suspend(vsp1);
139c9286 SF	413
4fc78784	414	clk_disable_unprepare(vsp1->clock);
139c9286	415
26e0ca22 LP	416	return 0;
	417	}
	418
	419	static int vsp1_pm_resume(struct device *dev)
	420	{
	421	struct vsp1_device *vsp1 = dev_get_drvdata(dev);
	422
	423	WARN_ON(mutex_is_locked(&vsp1->lock));
	424
139c9286	425	if (vsp1->ref_count == 0)
26e0ca22 LP	426	return 0;
26e0ca22 LP	427
139c9286 SF	428	clk_prepare_enable(vsp1->clock);
	429
	430	vsp1_pipelines_resume(vsp1);
	431
	432	return 0;
26e0ca22 LP	433	}
	434	#endif
	435
	436	static const struct dev_pm_ops vsp1_pm_ops = {
	437	SET_SYSTEM_SLEEP_PM_OPS(vsp1_pm_suspend, vsp1_pm_resume)
	438	};
	439
	440	/* -----------------------------------------------------------------------------
	441	* Platform Driver
	442	*/
	443
32d17597	444	static int vsp1_parse_dt(struct vsp1_device *vsp1)
26e0ca22	445	{
32d17597 LP	446	struct device_node *np = vsp1->dev->of_node;
	447	struct vsp1_platform_data *pdata = &vsp1->pdata;
	448
	449	if (of_property_read_bool(np, "renesas,has-lif"))
	450	pdata->features \|= VSP1_HAS_LIF;
	451	if (of_property_read_bool(np, "renesas,has-lut"))
	452	pdata->features \|= VSP1_HAS_LUT;
	453	if (of_property_read_bool(np, "renesas,has-sru"))
	454	pdata->features \|= VSP1_HAS_SRU;
	455
	456	of_property_read_u32(np, "renesas,#rpf", &pdata->rpf_count);
	457	of_property_read_u32(np, "renesas,#uds", &pdata->uds_count);
	458	of_property_read_u32(np, "renesas,#wpf", &pdata->wpf_count);
26e0ca22	459
7005a817	460	if (pdata->rpf_count <= 0 \|\| pdata->rpf_count > VSP1_MAX_RPF) {
32d17597	461	dev_err(vsp1->dev, "invalid number of RPF (%u)\n",
26e0ca22	462	pdata->rpf_count);
0b82fb95	463	return -EINVAL;
26e0ca22 LP	464	}
26e0ca22 LP	465
7005a817	466	if (pdata->uds_count <= 0 \|\| pdata->uds_count > VSP1_MAX_UDS) {
32d17597	467	dev_err(vsp1->dev, "invalid number of UDS (%u)\n",
26e0ca22	468	pdata->uds_count);
0b82fb95	469	return -EINVAL;
26e0ca22 LP	470	}
26e0ca22 LP	471
7005a817	472	if (pdata->wpf_count <= 0 \|\| pdata->wpf_count > VSP1_MAX_WPF) {
32d17597	473	dev_err(vsp1->dev, "invalid number of WPF (%u)\n",
26e0ca22	474	pdata->wpf_count);
0b82fb95	475	return -EINVAL;
26e0ca22 LP	476	}
26e0ca22 LP	477
0b82fb95 LP	478	return 0;
	479	}
	480
26e0ca22 LP	481	static int vsp1_probe(struct platform_device *pdev)
	482	{
	483	struct vsp1_device *vsp1;
	484	struct resource *irq;
	485	struct resource *io;
	486	int ret;
	487
	488	vsp1 = devm_kzalloc(&pdev->dev, sizeof(*vsp1), GFP_KERNEL);
	489	if (vsp1 == NULL)
	490	return -ENOMEM;
	491
	492	vsp1->dev = &pdev->dev;
	493	mutex_init(&vsp1->lock);
	494	INIT_LIST_HEAD(&vsp1->entities);
	495
32d17597	496	ret = vsp1_parse_dt(vsp1);
0b82fb95 LP	497	if (ret < 0)
	498	return ret;
	499
26e0ca22 LP	500	/* I/O, IRQ and clock resources */
	501	io = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	502	vsp1->mmio = devm_ioremap_resource(&pdev->dev, io);
cbec6d3a MCC	503	if (IS_ERR(vsp1->mmio))
cbec6d3a MCC	504	return PTR_ERR(vsp1->mmio);
26e0ca22 LP	505
	506	vsp1->clock = devm_clk_get(&pdev->dev, NULL);
	507	if (IS_ERR(vsp1->clock)) {
	508	dev_err(&pdev->dev, "failed to get clock\n");
	509	return PTR_ERR(vsp1->clock);
	510	}
	511
	512	irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
	513	if (!irq) {
	514	dev_err(&pdev->dev, "missing IRQ\n");
	515	return -EINVAL;
	516	}
	517
	518	ret = devm_request_irq(&pdev->dev, irq->start, vsp1_irq_handler,
	519	IRQF_SHARED, dev_name(&pdev->dev), vsp1);
	520	if (ret < 0) {
	521	dev_err(&pdev->dev, "failed to request IRQ\n");
	522	return ret;
	523	}
	524
	525	/* Instanciate entities */
	526	ret = vsp1_create_entities(vsp1);
	527	if (ret < 0) {
	528	dev_err(&pdev->dev, "failed to create entities\n");
	529	return ret;
	530	}
	531
	532	platform_set_drvdata(pdev, vsp1);
	533
	534	return 0;
	535	}
	536
	537	static int vsp1_remove(struct platform_device *pdev)
	538	{
	539	struct vsp1_device *vsp1 = platform_get_drvdata(pdev);
	540
	541	vsp1_destroy_entities(vsp1);
	542
	543	return 0;
	544	}
	545
0b82fb95 LP	546	static const struct of_device_id vsp1_of_match[] = {
	547	{ .compatible = "renesas,vsp1" },
	548	{ },
	549	};
	550
26e0ca22 LP	551	static struct platform_driver vsp1_platform_driver = {
	552	.probe = vsp1_probe,
	553	.remove = vsp1_remove,
	554	.driver = {
26e0ca22 LP	555	.name = "vsp1",
26e0ca22 LP	556	.pm = &vsp1_pm_ops,
0b82fb95	557	.of_match_table = vsp1_of_match,
26e0ca22 LP	558	},
	559	};
	560
	561	module_platform_driver(vsp1_platform_driver);
	562
	563	MODULE_ALIAS("vsp1");
	564	MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@ideasonboard.com>");
	565	MODULE_DESCRIPTION("Renesas VSP1 Driver");
	566	MODULE_LICENSE("GPL");