[media] v4l: Remove V4L2 OF framework in favour of V4L2 fwnode framework

ifeq ($(CONFIG_COMPAT),y)

ifeq ($(CONFIG_COMPAT),y)

  videodev-objs += v4l2-compat-ioctl32.o

  videodev-objs += v4l2-compat-ioctl32.o

endif

endif

ifeq ($(CONFIG_OF),y)

  videodev-objs += v4l2-of.o

endif

obj-$(CONFIG_V4L2_FWNODE) += v4l2-fwnode.o

obj-$(CONFIG_V4L2_FWNODE) += v4l2-fwnode.o

ifeq ($(CONFIG_TRACEPOINTS),y)

ifeq ($(CONFIG_TRACEPOINTS),y)

  videodev-objs += vb2-trace.o v4l2-trace.o

  videodev-objs += vb2-trace.o v4l2-trace.o

/*

 * V4L2 OF binding parsing library

 *

 * Copyright (C) 2012 - 2013 Samsung Electronics Co., Ltd.

 * Author: Sylwester Nawrocki <s.nawrocki@samsung.com>

 *

 * Copyright (C) 2012 Renesas Electronics Corp.

 * Author: Guennadi Liakhovetski <g.liakhovetski@gmx.de>

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of version 2 of the GNU General Public License as

 * published by the Free Software Foundation.

 */

#include <linux/kernel.h>

#include <linux/module.h>

#include <linux/of.h>

#include <linux/slab.h>

#include <linux/string.h>

#include <linux/types.h>

#include <media/v4l2-of.h>

static int v4l2_of_parse_csi_bus(const struct device_node *node,

				 struct v4l2_of_endpoint *endpoint)

{

	struct v4l2_of_bus_mipi_csi2 *bus = &endpoint->bus.mipi_csi2;

	struct property *prop;

	bool have_clk_lane = false;

	unsigned int flags = 0, lanes_used = 0;

	u32 v;

	prop = of_find_property(node, "data-lanes", NULL);

	if (prop) {

		const __be32 *lane = NULL;

		unsigned int i;

		for (i = 0; i < ARRAY_SIZE(bus->data_lanes); i++) {

			lane = of_prop_next_u32(prop, lane, &v);

			if (!lane)

				break;

			if (lanes_used & BIT(v))

				pr_warn("%s: duplicated lane %u in data-lanes\n",

					node->full_name, v);

			lanes_used |= BIT(v);

			bus->data_lanes[i] = v;

		}

		bus->num_data_lanes = i;

	}

	prop = of_find_property(node, "lane-polarities", NULL);

	if (prop) {

		const __be32 *polarity = NULL;

		unsigned int i;

		for (i = 0; i < ARRAY_SIZE(bus->lane_polarities); i++) {

			polarity = of_prop_next_u32(prop, polarity, &v);

			if (!polarity)

				break;

			bus->lane_polarities[i] = v;

		}

		if (i < 1 + bus->num_data_lanes /* clock + data */) {

			pr_warn("%s: too few lane-polarities entries (need %u, got %u)\n",

				node->full_name, 1 + bus->num_data_lanes, i);

			return -EINVAL;

		}

	}

	if (!of_property_read_u32(node, "clock-lanes", &v)) {

		if (lanes_used & BIT(v))

			pr_warn("%s: duplicated lane %u in clock-lanes\n",

				node->full_name, v);

		lanes_used |= BIT(v);

		bus->clock_lane = v;

		have_clk_lane = true;

	}

	if (of_get_property(node, "clock-noncontinuous", &v))

		flags |= V4L2_MBUS_CSI2_NONCONTINUOUS_CLOCK;

	else if (have_clk_lane || bus->num_data_lanes > 0)

		flags |= V4L2_MBUS_CSI2_CONTINUOUS_CLOCK;

	bus->flags = flags;

	endpoint->bus_type = V4L2_MBUS_CSI2;

	return 0;

}

static void v4l2_of_parse_parallel_bus(const struct device_node *node,

				       struct v4l2_of_endpoint *endpoint)

{

	struct v4l2_of_bus_parallel *bus = &endpoint->bus.parallel;

	unsigned int flags = 0;

	u32 v;

	if (!of_property_read_u32(node, "hsync-active", &v))

		flags |= v ? V4L2_MBUS_HSYNC_ACTIVE_HIGH :

			V4L2_MBUS_HSYNC_ACTIVE_LOW;

	if (!of_property_read_u32(node, "vsync-active", &v))

		flags |= v ? V4L2_MBUS_VSYNC_ACTIVE_HIGH :

			V4L2_MBUS_VSYNC_ACTIVE_LOW;

	if (!of_property_read_u32(node, "field-even-active", &v))

		flags |= v ? V4L2_MBUS_FIELD_EVEN_HIGH :

			V4L2_MBUS_FIELD_EVEN_LOW;

	if (flags)

		endpoint->bus_type = V4L2_MBUS_PARALLEL;

	else

		endpoint->bus_type = V4L2_MBUS_BT656;

	if (!of_property_read_u32(node, "pclk-sample", &v))

		flags |= v ? V4L2_MBUS_PCLK_SAMPLE_RISING :

			V4L2_MBUS_PCLK_SAMPLE_FALLING;

	if (!of_property_read_u32(node, "data-active", &v))

		flags |= v ? V4L2_MBUS_DATA_ACTIVE_HIGH :

			V4L2_MBUS_DATA_ACTIVE_LOW;

	if (of_get_property(node, "slave-mode", &v))

		flags |= V4L2_MBUS_SLAVE;

	else

		flags |= V4L2_MBUS_MASTER;

	if (!of_property_read_u32(node, "bus-width", &v))

		bus->bus_width = v;

	if (!of_property_read_u32(node, "data-shift", &v))

		bus->data_shift = v;

	if (!of_property_read_u32(node, "sync-on-green-active", &v))

		flags |= v ? V4L2_MBUS_VIDEO_SOG_ACTIVE_HIGH :

			V4L2_MBUS_VIDEO_SOG_ACTIVE_LOW;

	bus->flags = flags;

}

/**

 * v4l2_of_parse_endpoint() - parse all endpoint node properties

 * @node: pointer to endpoint device_node

 * @endpoint: pointer to the V4L2 OF endpoint data structure

 *

 * All properties are optional. If none are found, we don't set any flags.

 * This means the port has a static configuration and no properties have

 * to be specified explicitly.

 * If any properties that identify the bus as parallel are found and

 * slave-mode isn't set, we set V4L2_MBUS_MASTER. Similarly, if we recognise

 * the bus as serial CSI-2 and clock-noncontinuous isn't set, we set the

 * V4L2_MBUS_CSI2_CONTINUOUS_CLOCK flag.

 * The caller should hold a reference to @node.

 *

 * NOTE: This function does not parse properties the size of which is

 * variable without a low fixed limit. Please use

 * v4l2_of_alloc_parse_endpoint() in new drivers instead.

 *

 * Return: 0 on success or a negative error code on failure.

 */

int v4l2_of_parse_endpoint(const struct device_node *node,

			   struct v4l2_of_endpoint *endpoint)

{

	int rval;

	of_graph_parse_endpoint(node, &endpoint->base);

	/* Zero fields from bus_type to until the end */

	memset(&endpoint->bus_type, 0, sizeof(*endpoint) -

	       offsetof(typeof(*endpoint), bus_type));

	rval = v4l2_of_parse_csi_bus(node, endpoint);

	if (rval)

		return rval;

	/*

	 * Parse the parallel video bus properties only if none

	 * of the MIPI CSI-2 specific properties were found.

	 */

	if (endpoint->bus.mipi_csi2.flags == 0)

		v4l2_of_parse_parallel_bus(node, endpoint);

	return 0;

}

EXPORT_SYMBOL(v4l2_of_parse_endpoint);

/*

 * v4l2_of_free_endpoint() - free the endpoint acquired by

 * v4l2_of_alloc_parse_endpoint()

 * @endpoint - the endpoint the resources of which are to be released

 *

 * It is safe to call this function with NULL argument or on an

 * endpoint the parsing of which failed.

 */

void v4l2_of_free_endpoint(struct v4l2_of_endpoint *endpoint)

{

	if (IS_ERR_OR_NULL(endpoint))

		return;

	kfree(endpoint->link_frequencies);

	kfree(endpoint);

}

EXPORT_SYMBOL(v4l2_of_free_endpoint);

/**

 * v4l2_of_alloc_parse_endpoint() - parse all endpoint node properties

 * @node: pointer to endpoint device_node

 *

 * All properties are optional. If none are found, we don't set any flags.

 * This means the port has a static configuration and no properties have

 * to be specified explicitly.

 * If any properties that identify the bus as parallel are found and

 * slave-mode isn't set, we set V4L2_MBUS_MASTER. Similarly, if we recognise

 * the bus as serial CSI-2 and clock-noncontinuous isn't set, we set the

 * V4L2_MBUS_CSI2_CONTINUOUS_CLOCK flag.

 * The caller should hold a reference to @node.

 *

 * v4l2_of_alloc_parse_endpoint() has two important differences to

 * v4l2_of_parse_endpoint():

 *

 * 1. It also parses variable size data and

 *

 * 2. The memory it has allocated to store the variable size data must

 *    be freed using v4l2_of_free_endpoint() when no longer needed.

 *

 * Return: Pointer to v4l2_of_endpoint if successful, on error a

 * negative error code.

 */

struct v4l2_of_endpoint *v4l2_of_alloc_parse_endpoint(

	const struct device_node *node)

{

	struct v4l2_of_endpoint *endpoint;

	int len;

	int rval;

	endpoint = kzalloc(sizeof(*endpoint), GFP_KERNEL);

	if (!endpoint)

		return ERR_PTR(-ENOMEM);

	rval = v4l2_of_parse_endpoint(node, endpoint);

	if (rval < 0)

		goto out_err;

	if (of_get_property(node, "link-frequencies", &len)) {

		endpoint->link_frequencies = kmalloc(len, GFP_KERNEL);

		if (!endpoint->link_frequencies) {

			rval = -ENOMEM;

			goto out_err;

		}

		endpoint->nr_of_link_frequencies =

			len / sizeof(*endpoint->link_frequencies);

		rval = of_property_read_u64_array(

			node, "link-frequencies", endpoint->link_frequencies,

			endpoint->nr_of_link_frequencies);

		if (rval < 0)

			goto out_err;

	}

	return endpoint;

out_err:

	v4l2_of_free_endpoint(endpoint);

	return ERR_PTR(rval);

}

EXPORT_SYMBOL(v4l2_of_alloc_parse_endpoint);

/**

 * v4l2_of_parse_link() - parse a link between two endpoints

 * @node: pointer to the endpoint at the local end of the link

 * @link: pointer to the V4L2 OF link data structure

 *

 * Fill the link structure with the local and remote nodes and port numbers.

 * The local_node and remote_node fields are set to point to the local and

 * remote port's parent nodes respectively (the port parent node being the

 * parent node of the port node if that node isn't a 'ports' node, or the

 * grand-parent node of the port node otherwise).

 *

 * A reference is taken to both the local and remote nodes, the caller must use

 * v4l2_of_put_link() to drop the references when done with the link.

 *

 * Return: 0 on success, or -ENOLINK if the remote endpoint can't be found.

 */

int v4l2_of_parse_link(const struct device_node *node,

		       struct v4l2_of_link *link)

{

	struct device_node *np;

	memset(link, 0, sizeof(*link));

	np = of_get_parent(node);

	of_property_read_u32(np, "reg", &link->local_port);

	np = of_get_next_parent(np);

	if (of_node_cmp(np->name, "ports") == 0)

		np = of_get_next_parent(np);

	link->local_node = np;

	np = of_parse_phandle(node, "remote-endpoint", 0);

	if (!np) {

		of_node_put(link->local_node);

		return -ENOLINK;

	}

	np = of_get_parent(np);

	of_property_read_u32(np, "reg", &link->remote_port);

	np = of_get_next_parent(np);

	if (of_node_cmp(np->name, "ports") == 0)

		np = of_get_next_parent(np);

	link->remote_node = np;

	return 0;

}

EXPORT_SYMBOL(v4l2_of_parse_link);

/**

 * v4l2_of_put_link() - drop references to nodes in a link

 * @link: pointer to the V4L2 OF link data structure

 *

 * Drop references to the local and remote nodes in the link. This function must

 * be called on every link parsed with v4l2_of_parse_link().

 */

void v4l2_of_put_link(struct v4l2_of_link *link)

{

	of_node_put(link->local_node);

	of_node_put(link->remote_node);

}

EXPORT_SYMBOL(v4l2_of_put_link);

/*

 * V4L2 OF binding parsing library

 *

 * Copyright (C) 2012 - 2013 Samsung Electronics Co., Ltd.

 * Author: Sylwester Nawrocki <s.nawrocki@samsung.com>

 *

 * Copyright (C) 2012 Renesas Electronics Corp.

 * Author: Guennadi Liakhovetski <g.liakhovetski@gmx.de>

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of version 2 of the GNU General Public License as

 * published by the Free Software Foundation.

 */

#ifndef _V4L2_OF_H

#define _V4L2_OF_H

#include <linux/list.h>

#include <linux/types.h>

#include <linux/errno.h>

#include <linux/of_graph.h>

#include <media/v4l2-mediabus.h>

struct device_node;

/**

 * struct v4l2_of_bus_mipi_csi2 - MIPI CSI-2 bus data structure

 * @flags: media bus (V4L2_MBUS_*) flags

 * @data_lanes: an array of physical data lane indexes

 * @clock_lane: physical lane index of the clock lane

 * @num_data_lanes: number of data lanes

 * @lane_polarities: polarity of the lanes. The order is the same of

 *		   the physical lanes.

 */

struct v4l2_of_bus_mipi_csi2 {

	unsigned int flags;

	unsigned char data_lanes[4];

	unsigned char clock_lane;

	unsigned short num_data_lanes;

	bool lane_polarities[5];

};

/**

 * struct v4l2_of_bus_parallel - parallel data bus data structure

 * @flags: media bus (V4L2_MBUS_*) flags

 * @bus_width: bus width in bits

 * @data_shift: data shift in bits

 */

struct v4l2_of_bus_parallel {

	unsigned int flags;

	unsigned char bus_width;

	unsigned char data_shift;

};

/**

 * struct v4l2_of_endpoint - the endpoint data structure

 * @base: struct of_endpoint containing port, id, and local of_node

 * @bus_type: bus type

 * @bus: bus configuration data structure

 * @link_frequencies: array of supported link frequencies

 * @nr_of_link_frequencies: number of elements in link_frequenccies array

 */

struct v4l2_of_endpoint {

	struct of_endpoint base;

	/* Fields below this line will be zeroed by v4l2_of_parse_endpoint() */

	enum v4l2_mbus_type bus_type;

	union {

		struct v4l2_of_bus_parallel parallel;

		struct v4l2_of_bus_mipi_csi2 mipi_csi2;

	} bus;

	u64 *link_frequencies;

	unsigned int nr_of_link_frequencies;

};

/**

 * struct v4l2_of_link - a link between two endpoints

 * @local_node: pointer to device_node of this endpoint

 * @local_port: identifier of the port this endpoint belongs to

 * @remote_node: pointer to device_node of the remote endpoint

 * @remote_port: identifier of the port the remote endpoint belongs to

 */

struct v4l2_of_link {

	struct device_node *local_node;

	unsigned int local_port;

	struct device_node *remote_node;

	unsigned int remote_port;

};

#ifdef CONFIG_OF

int v4l2_of_parse_endpoint(const struct device_node *node,

			   struct v4l2_of_endpoint *endpoint);

struct v4l2_of_endpoint *v4l2_of_alloc_parse_endpoint(

	const struct device_node *node);

void v4l2_of_free_endpoint(struct v4l2_of_endpoint *endpoint);

int v4l2_of_parse_link(const struct device_node *node,

		       struct v4l2_of_link *link);

void v4l2_of_put_link(struct v4l2_of_link *link);

#else /* CONFIG_OF */

static inline int v4l2_of_parse_endpoint(const struct device_node *node,

					struct v4l2_of_endpoint *link)

{

	return -ENOSYS;

}

static inline struct v4l2_of_endpoint *v4l2_of_alloc_parse_endpoint(

	const struct device_node *node)

{

	return NULL;

}

static inline void v4l2_of_free_endpoint(struct v4l2_of_endpoint *endpoint)

{

}

static inline int v4l2_of_parse_link(const struct device_node *node,

				     struct v4l2_of_link *link)

{

	return -ENOSYS;

}

static inline void v4l2_of_put_link(struct v4l2_of_link *link)

{

}

#endif /* CONFIG_OF */

#endif /* _V4L2_OF_H */