Adding upstream version 4.19.249.upstream/4.19.249

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 446 insertions, 0 deletions

diff --git a/drivers/media/v4l2-core/v4l2-common.c b/drivers/media/v4l2-core/v4l2-common.c
new file mode 100644
index 000000000..b518b92d6
--- /dev/null
+++ b/drivers/media/v4l2-core/v4l2-common.c
@@ -0,0 +1,446 @@
+/*
+ *	Video for Linux Two
+ *
+ *	A generic video device interface for the LINUX operating system
+ *	using a set of device structures/vectors for low level operations.
+ *
+ *	This file replaces the videodev.c file that comes with the
+ *	regular kernel distribution.
+ *
+ *	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.
+ *
+ * Author:	Bill Dirks <bill@thedirks.org>
+ *		based on code by Alan Cox, <alan@cymru.net>
+ *
+ */
+
+/*
+ * Video capture interface for Linux
+ *
+ *	A generic video device interface for the LINUX operating system
+ *	using a set of device structures/vectors for low level operations.
+ *
+ *		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.
+ *
+ * Author:	Alan Cox, <alan@lxorguk.ukuu.org.uk>
+ *
+ * Fixes:
+ */
+
+/*
+ * Video4linux 1/2 integration by Justin Schoeman
+ * <justin@suntiger.ee.up.ac.za>
+ * 2.4 PROCFS support ported from 2.4 kernels by
+ *  Iñaki García Etxebarria <garetxe@euskalnet.net>
+ * Makefile fix by "W. Michael Petullo" <mike@flyn.org>
+ * 2.4 devfs support ported from 2.4 kernels by
+ *  Dan Merillat <dan@merillat.org>
+ * Added Gerd Knorrs v4l1 enhancements (Justin Schoeman)
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/string.h>
+#include <linux/errno.h>
+#include <linux/i2c.h>
+#if defined(CONFIG_SPI)
+#include <linux/spi/spi.h>
+#endif
+#include <linux/uaccess.h>
+#include <asm/pgtable.h>
+#include <asm/io.h>
+#include <asm/div64.h>
+#include <media/v4l2-common.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-ctrls.h>
+
+#include <linux/videodev2.h>
+
+MODULE_AUTHOR("Bill Dirks, Justin Schoeman, Gerd Knorr");
+MODULE_DESCRIPTION("misc helper functions for v4l2 device drivers");
+MODULE_LICENSE("GPL");
+
+/*
+ *
+ *	V 4 L 2   D R I V E R   H E L P E R   A P I
+ *
+ */
+
+/*
+ *  Video Standard Operations (contributed by Michael Schimek)
+ */
+
+/* Helper functions for control handling			     */
+
+/* Fill in a struct v4l2_queryctrl */
+int v4l2_ctrl_query_fill(struct v4l2_queryctrl *qctrl, s32 _min, s32 _max, s32 _step, s32 _def)
+{
+	const char *name;
+	s64 min = _min;
+	s64 max = _max;
+	u64 step = _step;
+	s64 def = _def;
+
+	v4l2_ctrl_fill(qctrl->id, &name, &qctrl->type,
+		       &min, &max, &step, &def, &qctrl->flags);
+
+	if (name == NULL)
+		return -EINVAL;
+
+	qctrl->minimum = min;
+	qctrl->maximum = max;
+	qctrl->step = step;
+	qctrl->default_value = def;
+	qctrl->reserved[0] = qctrl->reserved[1] = 0;
+	strlcpy(qctrl->name, name, sizeof(qctrl->name));
+	return 0;
+}
+EXPORT_SYMBOL(v4l2_ctrl_query_fill);
+
+/* I2C Helper functions */
+
+#if IS_ENABLED(CONFIG_I2C)
+
+void v4l2_i2c_subdev_init(struct v4l2_subdev *sd, struct i2c_client *client,
+		const struct v4l2_subdev_ops *ops)
+{
+	v4l2_subdev_init(sd, ops);
+	sd->flags |= V4L2_SUBDEV_FL_IS_I2C;
+	/* the owner is the same as the i2c_client's driver owner */
+	sd->owner = client->dev.driver->owner;
+	sd->dev = &client->dev;
+	/* i2c_client and v4l2_subdev point to one another */
+	v4l2_set_subdevdata(sd, client);
+	i2c_set_clientdata(client, sd);
+	/* initialize name */
+	snprintf(sd->name, sizeof(sd->name), "%s %d-%04x",
+		client->dev.driver->name, i2c_adapter_id(client->adapter),
+		client->addr);
+}
+EXPORT_SYMBOL_GPL(v4l2_i2c_subdev_init);
+
+/* Load an i2c sub-device. */
+struct v4l2_subdev *v4l2_i2c_new_subdev_board(struct v4l2_device *v4l2_dev,
+		struct i2c_adapter *adapter, struct i2c_board_info *info,
+		const unsigned short *probe_addrs)
+{
+	struct v4l2_subdev *sd = NULL;
+	struct i2c_client *client;
+
+	BUG_ON(!v4l2_dev);
+
+	request_module(I2C_MODULE_PREFIX "%s", info->type);
+
+	/* Create the i2c client */
+	if (info->addr == 0 && probe_addrs)
+		client = i2c_new_probed_device(adapter, info, probe_addrs,
+					       NULL);
+	else
+		client = i2c_new_device(adapter, info);
+
+	/* Note: by loading the module first we are certain that c->driver
+	   will be set if the driver was found. If the module was not loaded
+	   first, then the i2c core tries to delay-load the module for us,
+	   and then c->driver is still NULL until the module is finally
+	   loaded. This delay-load mechanism doesn't work if other drivers
+	   want to use the i2c device, so explicitly loading the module
+	   is the best alternative. */
+	if (client == NULL || client->dev.driver == NULL)
+		goto error;
+
+	/* Lock the module so we can safely get the v4l2_subdev pointer */
+	if (!try_module_get(client->dev.driver->owner))
+		goto error;
+	sd = i2c_get_clientdata(client);
+
+	/* Register with the v4l2_device which increases the module's
+	   use count as well. */
+	if (v4l2_device_register_subdev(v4l2_dev, sd))
+		sd = NULL;
+	/* Decrease the module use count to match the first try_module_get. */
+	module_put(client->dev.driver->owner);
+
+error:
+	/* If we have a client but no subdev, then something went wrong and
+	   we must unregister the client. */
+	if (client && sd == NULL)
+		i2c_unregister_device(client);
+	return sd;
+}
+EXPORT_SYMBOL_GPL(v4l2_i2c_new_subdev_board);
+
+struct v4l2_subdev *v4l2_i2c_new_subdev(struct v4l2_device *v4l2_dev,
+		struct i2c_adapter *adapter, const char *client_type,
+		u8 addr, const unsigned short *probe_addrs)
+{
+	struct i2c_board_info info;
+
+	/* Setup the i2c board info with the device type and
+	   the device address. */
+	memset(&info, 0, sizeof(info));
+	strlcpy(info.type, client_type, sizeof(info.type));
+	info.addr = addr;
+
+	return v4l2_i2c_new_subdev_board(v4l2_dev, adapter, &info, probe_addrs);
+}
+EXPORT_SYMBOL_GPL(v4l2_i2c_new_subdev);
+
+/* Return i2c client address of v4l2_subdev. */
+unsigned short v4l2_i2c_subdev_addr(struct v4l2_subdev *sd)
+{
+	struct i2c_client *client = v4l2_get_subdevdata(sd);
+
+	return client ? client->addr : I2C_CLIENT_END;
+}
+EXPORT_SYMBOL_GPL(v4l2_i2c_subdev_addr);
+
+/* Return a list of I2C tuner addresses to probe. Use only if the tuner
+   addresses are unknown. */
+const unsigned short *v4l2_i2c_tuner_addrs(enum v4l2_i2c_tuner_type type)
+{
+	static const unsigned short radio_addrs[] = {
+#if IS_ENABLED(CONFIG_MEDIA_TUNER_TEA5761)
+		0x10,
+#endif
+		0x60,
+		I2C_CLIENT_END
+	};
+	static const unsigned short demod_addrs[] = {
+		0x42, 0x43, 0x4a, 0x4b,
+		I2C_CLIENT_END
+	};
+	static const unsigned short tv_addrs[] = {
+		0x42, 0x43, 0x4a, 0x4b,		/* tda8290 */
+		0x60, 0x61, 0x62, 0x63, 0x64,
+		I2C_CLIENT_END
+	};
+
+	switch (type) {
+	case ADDRS_RADIO:
+		return radio_addrs;
+	case ADDRS_DEMOD:
+		return demod_addrs;
+	case ADDRS_TV:
+		return tv_addrs;
+	case ADDRS_TV_WITH_DEMOD:
+		return tv_addrs + 4;
+	}
+	return NULL;
+}
+EXPORT_SYMBOL_GPL(v4l2_i2c_tuner_addrs);
+
+#endif /* defined(CONFIG_I2C) */
+
+#if defined(CONFIG_SPI)
+
+/* Load an spi sub-device. */
+
+void v4l2_spi_subdev_init(struct v4l2_subdev *sd, struct spi_device *spi,
+		const struct v4l2_subdev_ops *ops)
+{
+	v4l2_subdev_init(sd, ops);
+	sd->flags |= V4L2_SUBDEV_FL_IS_SPI;
+	/* the owner is the same as the spi_device's driver owner */
+	sd->owner = spi->dev.driver->owner;
+	sd->dev = &spi->dev;
+	/* spi_device and v4l2_subdev point to one another */
+	v4l2_set_subdevdata(sd, spi);
+	spi_set_drvdata(spi, sd);
+	/* initialize name */
+	strlcpy(sd->name, spi->dev.driver->name, sizeof(sd->name));
+}
+EXPORT_SYMBOL_GPL(v4l2_spi_subdev_init);
+
+struct v4l2_subdev *v4l2_spi_new_subdev(struct v4l2_device *v4l2_dev,
+		struct spi_master *master, struct spi_board_info *info)
+{
+	struct v4l2_subdev *sd = NULL;
+	struct spi_device *spi = NULL;
+
+	BUG_ON(!v4l2_dev);
+
+	if (info->modalias[0])
+		request_module(info->modalias);
+
+	spi = spi_new_device(master, info);
+
+	if (spi == NULL || spi->dev.driver == NULL)
+		goto error;
+
+	if (!try_module_get(spi->dev.driver->owner))
+		goto error;
+
+	sd = spi_get_drvdata(spi);
+
+	/* Register with the v4l2_device which increases the module's
+	   use count as well. */
+	if (v4l2_device_register_subdev(v4l2_dev, sd))
+		sd = NULL;
+
+	/* Decrease the module use count to match the first try_module_get. */
+	module_put(spi->dev.driver->owner);
+
+error:
+	/* If we have a client but no subdev, then something went wrong and
+	   we must unregister the client. */
+	if (!sd)
+		spi_unregister_device(spi);
+
+	return sd;
+}
+EXPORT_SYMBOL_GPL(v4l2_spi_new_subdev);
+
+#endif /* defined(CONFIG_SPI) */
+
+/* Clamp x to be between min and max, aligned to a multiple of 2^align.  min
+ * and max don't have to be aligned, but there must be at least one valid
+ * value.  E.g., min=17,max=31,align=4 is not allowed as there are no multiples
+ * of 16 between 17 and 31.  */
+static unsigned int clamp_align(unsigned int x, unsigned int min,
+				unsigned int max, unsigned int align)
+{
+	/* Bits that must be zero to be aligned */
+	unsigned int mask = ~((1 << align) - 1);
+
+	/* Clamp to aligned min and max */
+	x = clamp(x, (min + ~mask) & mask, max & mask);
+
+	/* Round to nearest aligned value */
+	if (align)
+		x = (x + (1 << (align - 1))) & mask;
+
+	return x;
+}
+
+void v4l_bound_align_image(u32 *w, unsigned int wmin, unsigned int wmax,
+			   unsigned int walign,
+			   u32 *h, unsigned int hmin, unsigned int hmax,
+			   unsigned int halign, unsigned int salign)
+{
+	*w = clamp_align(*w, wmin, wmax, walign);
+	*h = clamp_align(*h, hmin, hmax, halign);
+
+	/* Usually we don't need to align the size and are done now. */
+	if (!salign)
+		return;
+
+	/* How much alignment do we have? */
+	walign = __ffs(*w);
+	halign = __ffs(*h);
+	/* Enough to satisfy the image alignment? */
+	if (walign + halign < salign) {
+		/* Max walign where there is still a valid width */
+		unsigned int wmaxa = __fls(wmax ^ (wmin - 1));
+		/* Max halign where there is still a valid height */
+		unsigned int hmaxa = __fls(hmax ^ (hmin - 1));
+
+		/* up the smaller alignment until we have enough */
+		do {
+			if (halign >= hmaxa ||
+			    (walign <= halign && walign < wmaxa)) {
+				*w = clamp_align(*w, wmin, wmax, walign + 1);
+				walign = __ffs(*w);
+			} else {
+				*h = clamp_align(*h, hmin, hmax, halign + 1);
+				halign = __ffs(*h);
+			}
+		} while (halign + walign < salign);
+	}
+}
+EXPORT_SYMBOL_GPL(v4l_bound_align_image);
+
+const void *
+__v4l2_find_nearest_size(const void *array, size_t array_size,
+			 size_t entry_size, size_t width_offset,
+			 size_t height_offset, s32 width, s32 height)
+{
+	u32 error, min_error = U32_MAX;
+	const void *best = NULL;
+	unsigned int i;
+
+	if (!array)
+		return NULL;
+
+	for (i = 0; i < array_size; i++, array += entry_size) {
+		const u32 *entry_width = array + width_offset;
+		const u32 *entry_height = array + height_offset;
+
+		error = abs(*entry_width - width) + abs(*entry_height - height);
+		if (error > min_error)
+			continue;
+
+		min_error = error;
+		best = array;
+		if (!error)
+			break;
+	}
+
+	return best;
+}
+EXPORT_SYMBOL_GPL(__v4l2_find_nearest_size);
+
+void v4l2_get_timestamp(struct timeval *tv)
+{
+	struct timespec ts;
+
+	ktime_get_ts(&ts);
+	tv->tv_sec = ts.tv_sec;
+	tv->tv_usec = ts.tv_nsec / NSEC_PER_USEC;
+}
+EXPORT_SYMBOL_GPL(v4l2_get_timestamp);
+
+int v4l2_g_parm_cap(struct video_device *vdev,
+		    struct v4l2_subdev *sd, struct v4l2_streamparm *a)
+{
+	struct v4l2_subdev_frame_interval ival = { 0 };
+	int ret;
+
+	if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
+	    a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
+		return -EINVAL;
+
+	if (vdev->device_caps & V4L2_CAP_READWRITE)
+		a->parm.capture.readbuffers = 2;
+	if (v4l2_subdev_has_op(sd, video, g_frame_interval))
+		a->parm.capture.capability = V4L2_CAP_TIMEPERFRAME;
+	ret = v4l2_subdev_call(sd, video, g_frame_interval, &ival);
+	if (!ret)
+		a->parm.capture.timeperframe = ival.interval;
+	return ret;
+}
+EXPORT_SYMBOL_GPL(v4l2_g_parm_cap);
+
+int v4l2_s_parm_cap(struct video_device *vdev,
+		    struct v4l2_subdev *sd, struct v4l2_streamparm *a)
+{
+	struct v4l2_subdev_frame_interval ival = {
+		.interval = a->parm.capture.timeperframe
+	};
+	int ret;
+
+	if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
+	    a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
+		return -EINVAL;
+
+	memset(&a->parm, 0, sizeof(a->parm));
+	if (vdev->device_caps & V4L2_CAP_READWRITE)
+		a->parm.capture.readbuffers = 2;
+	else
+		a->parm.capture.readbuffers = 0;
+
+	if (v4l2_subdev_has_op(sd, video, g_frame_interval))
+		a->parm.capture.capability = V4L2_CAP_TIMEPERFRAME;
+	ret = v4l2_subdev_call(sd, video, s_frame_interval, &ival);
+	if (!ret)
+		a->parm.capture.timeperframe = ival.interval;
+	return ret;
+}
+EXPORT_SYMBOL_GPL(v4l2_s_parm_cap);