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media: v4l2-core: move i2c helpers out of v4l2-common.c
Separate the i2c helpers to v4l2-i2c.c, in order to get rid of the ifdefery. No functional changes intended, this is just a cosmetic change to organize the code better. Given I2C is a tristate symbol, a hidden boolean symbol is introduced, to make the conditional build easier. Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com> Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
This commit is contained in:
Ezequiel Garcia
Mauro Carvalho Chehab
parent
7c795df5f3
commit
02283b98b1
@ -11,6 +11,11 @@ config VIDEO_V4L2
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select VIDEOBUF2_V4L2 if VIDEOBUF2_CORE
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default (I2C || I2C=n) && VIDEO_DEV
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config VIDEO_V4L2_I2C
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bool
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depends on I2C && VIDEO_V4L2
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default y
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config VIDEO_ADV_DEBUG
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bool "Enable advanced debug functionality on V4L2 drivers"
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help
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@ -12,6 +12,7 @@ videodev-$(CONFIG_COMPAT) += v4l2-compat-ioctl32.o
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videodev-$(CONFIG_TRACEPOINTS) += v4l2-trace.o
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videodev-$(CONFIG_MEDIA_CONTROLLER) += v4l2-mc.o
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videodev-$(CONFIG_SPI) += v4l2-spi.o
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videodev-$(CONFIG_VIDEO_V4L2_I2C) += v4l2-i2c.o
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obj-$(CONFIG_V4L2_FWNODE) += v4l2-fwnode.o
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obj-$(CONFIG_VIDEO_V4L2) += videodev.o
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@ -40,7 +40,6 @@
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#include <linux/mm.h>
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#include <linux/string.h>
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#include <linux/errno.h>
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#include <linux/i2c.h>
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#include <linux/uaccess.h>
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#include <asm/pgtable.h>
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#include <asm/io.h>
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@ -88,150 +87,6 @@ int v4l2_ctrl_query_fill(struct v4l2_queryctrl *qctrl, s32 _min, s32 _max, s32 _
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}
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EXPORT_SYMBOL(v4l2_ctrl_query_fill);
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/* I2C Helper functions */
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#if IS_ENABLED(CONFIG_I2C)
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void v4l2_i2c_subdev_set_name(struct v4l2_subdev *sd, struct i2c_client *client,
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const char *devname, const char *postfix)
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{
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if (!devname)
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devname = client->dev.driver->name;
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if (!postfix)
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postfix = "";
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snprintf(sd->name, sizeof(sd->name), "%s%s %d-%04x", devname, postfix,
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i2c_adapter_id(client->adapter), client->addr);
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}
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EXPORT_SYMBOL_GPL(v4l2_i2c_subdev_set_name);
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void v4l2_i2c_subdev_init(struct v4l2_subdev *sd, struct i2c_client *client,
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const struct v4l2_subdev_ops *ops)
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{
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v4l2_subdev_init(sd, ops);
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sd->flags |= V4L2_SUBDEV_FL_IS_I2C;
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/* the owner is the same as the i2c_client's driver owner */
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sd->owner = client->dev.driver->owner;
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sd->dev = &client->dev;
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/* i2c_client and v4l2_subdev point to one another */
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v4l2_set_subdevdata(sd, client);
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i2c_set_clientdata(client, sd);
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v4l2_i2c_subdev_set_name(sd, client, NULL, NULL);
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}
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EXPORT_SYMBOL_GPL(v4l2_i2c_subdev_init);
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/* Load an i2c sub-device. */
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struct v4l2_subdev *v4l2_i2c_new_subdev_board(struct v4l2_device *v4l2_dev,
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struct i2c_adapter *adapter, struct i2c_board_info *info,
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const unsigned short *probe_addrs)
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{
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struct v4l2_subdev *sd = NULL;
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struct i2c_client *client;
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BUG_ON(!v4l2_dev);
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request_module(I2C_MODULE_PREFIX "%s", info->type);
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/* Create the i2c client */
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if (info->addr == 0 && probe_addrs)
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client = i2c_new_probed_device(adapter, info, probe_addrs,
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NULL);
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else
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client = i2c_new_device(adapter, info);
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/* Note: by loading the module first we are certain that c->driver
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will be set if the driver was found. If the module was not loaded
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first, then the i2c core tries to delay-load the module for us,
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and then c->driver is still NULL until the module is finally
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loaded. This delay-load mechanism doesn't work if other drivers
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want to use the i2c device, so explicitly loading the module
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is the best alternative. */
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if (client == NULL || client->dev.driver == NULL)
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goto error;
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/* Lock the module so we can safely get the v4l2_subdev pointer */
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if (!try_module_get(client->dev.driver->owner))
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goto error;
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sd = i2c_get_clientdata(client);
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/* Register with the v4l2_device which increases the module's
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use count as well. */
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if (v4l2_device_register_subdev(v4l2_dev, sd))
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sd = NULL;
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/* Decrease the module use count to match the first try_module_get. */
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module_put(client->dev.driver->owner);
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error:
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/* If we have a client but no subdev, then something went wrong and
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we must unregister the client. */
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if (client && sd == NULL)
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i2c_unregister_device(client);
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return sd;
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}
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EXPORT_SYMBOL_GPL(v4l2_i2c_new_subdev_board);
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struct v4l2_subdev *v4l2_i2c_new_subdev(struct v4l2_device *v4l2_dev,
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struct i2c_adapter *adapter, const char *client_type,
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u8 addr, const unsigned short *probe_addrs)
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{
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struct i2c_board_info info;
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/* Setup the i2c board info with the device type and
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the device address. */
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memset(&info, 0, sizeof(info));
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strscpy(info.type, client_type, sizeof(info.type));
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info.addr = addr;
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return v4l2_i2c_new_subdev_board(v4l2_dev, adapter, &info, probe_addrs);
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}
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EXPORT_SYMBOL_GPL(v4l2_i2c_new_subdev);
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/* Return i2c client address of v4l2_subdev. */
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unsigned short v4l2_i2c_subdev_addr(struct v4l2_subdev *sd)
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{
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struct i2c_client *client = v4l2_get_subdevdata(sd);
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return client ? client->addr : I2C_CLIENT_END;
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}
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EXPORT_SYMBOL_GPL(v4l2_i2c_subdev_addr);
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/* Return a list of I2C tuner addresses to probe. Use only if the tuner
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addresses are unknown. */
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const unsigned short *v4l2_i2c_tuner_addrs(enum v4l2_i2c_tuner_type type)
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{
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static const unsigned short radio_addrs[] = {
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#if IS_ENABLED(CONFIG_MEDIA_TUNER_TEA5761)
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0x10,
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#endif
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0x60,
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I2C_CLIENT_END
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};
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static const unsigned short demod_addrs[] = {
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0x42, 0x43, 0x4a, 0x4b,
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I2C_CLIENT_END
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};
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static const unsigned short tv_addrs[] = {
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0x42, 0x43, 0x4a, 0x4b, /* tda8290 */
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0x60, 0x61, 0x62, 0x63, 0x64,
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I2C_CLIENT_END
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};
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switch (type) {
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case ADDRS_RADIO:
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return radio_addrs;
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case ADDRS_DEMOD:
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return demod_addrs;
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case ADDRS_TV:
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return tv_addrs;
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case ADDRS_TV_WITH_DEMOD:
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return tv_addrs + 4;
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}
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return NULL;
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}
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EXPORT_SYMBOL_GPL(v4l2_i2c_tuner_addrs);
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#endif /* defined(CONFIG_I2C) */
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/* Clamp x to be between min and max, aligned to a multiple of 2^align. min
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* and max don't have to be aligned, but there must be at least one valid
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* value. E.g., min=17,max=31,align=4 is not allowed as there are no multiples
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147
drivers/media/v4l2-core/v4l2-i2c.c
Normal file
147
drivers/media/v4l2-core/v4l2-i2c.c
Normal file
@ -0,0 +1,147 @@
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// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* v4l2-i2c - I2C helpers for Video4Linux2
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*/
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#include <linux/i2c.h>
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#include <linux/module.h>
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#include <media/v4l2-common.h>
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#include <media/v4l2-device.h>
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void v4l2_i2c_subdev_set_name(struct v4l2_subdev *sd, struct i2c_client *client,
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const char *devname, const char *postfix)
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{
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if (!devname)
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devname = client->dev.driver->name;
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if (!postfix)
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postfix = "";
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snprintf(sd->name, sizeof(sd->name), "%s%s %d-%04x", devname, postfix,
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i2c_adapter_id(client->adapter), client->addr);
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}
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EXPORT_SYMBOL_GPL(v4l2_i2c_subdev_set_name);
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void v4l2_i2c_subdev_init(struct v4l2_subdev *sd, struct i2c_client *client,
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const struct v4l2_subdev_ops *ops)
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{
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v4l2_subdev_init(sd, ops);
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sd->flags |= V4L2_SUBDEV_FL_IS_I2C;
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/* the owner is the same as the i2c_client's driver owner */
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sd->owner = client->dev.driver->owner;
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sd->dev = &client->dev;
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/* i2c_client and v4l2_subdev point to one another */
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v4l2_set_subdevdata(sd, client);
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i2c_set_clientdata(client, sd);
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v4l2_i2c_subdev_set_name(sd, client, NULL, NULL);
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}
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EXPORT_SYMBOL_GPL(v4l2_i2c_subdev_init);
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/* Load an i2c sub-device. */
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struct v4l2_subdev *v4l2_i2c_new_subdev_board(struct v4l2_device *v4l2_dev,
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struct i2c_adapter *adapter, struct i2c_board_info *info,
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const unsigned short *probe_addrs)
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{
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struct v4l2_subdev *sd = NULL;
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struct i2c_client *client;
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BUG_ON(!v4l2_dev);
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request_module(I2C_MODULE_PREFIX "%s", info->type);
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/* Create the i2c client */
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if (info->addr == 0 && probe_addrs)
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client = i2c_new_probed_device(adapter, info, probe_addrs,
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NULL);
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else
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client = i2c_new_device(adapter, info);
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/* Note: by loading the module first we are certain that c->driver
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will be set if the driver was found. If the module was not loaded
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first, then the i2c core tries to delay-load the module for us,
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and then c->driver is still NULL until the module is finally
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loaded. This delay-load mechanism doesn't work if other drivers
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want to use the i2c device, so explicitly loading the module
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is the best alternative. */
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if (client == NULL || client->dev.driver == NULL)
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goto error;
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/* Lock the module so we can safely get the v4l2_subdev pointer */
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if (!try_module_get(client->dev.driver->owner))
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goto error;
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sd = i2c_get_clientdata(client);
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/* Register with the v4l2_device which increases the module's
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use count as well. */
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if (v4l2_device_register_subdev(v4l2_dev, sd))
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sd = NULL;
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/* Decrease the module use count to match the first try_module_get. */
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module_put(client->dev.driver->owner);
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error:
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/* If we have a client but no subdev, then something went wrong and
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we must unregister the client. */
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if (client && sd == NULL)
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i2c_unregister_device(client);
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return sd;
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}
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EXPORT_SYMBOL_GPL(v4l2_i2c_new_subdev_board);
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struct v4l2_subdev *v4l2_i2c_new_subdev(struct v4l2_device *v4l2_dev,
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struct i2c_adapter *adapter, const char *client_type,
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u8 addr, const unsigned short *probe_addrs)
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{
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struct i2c_board_info info;
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/* Setup the i2c board info with the device type and
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the device address. */
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memset(&info, 0, sizeof(info));
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strscpy(info.type, client_type, sizeof(info.type));
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info.addr = addr;
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return v4l2_i2c_new_subdev_board(v4l2_dev, adapter, &info, probe_addrs);
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}
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EXPORT_SYMBOL_GPL(v4l2_i2c_new_subdev);
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/* Return i2c client address of v4l2_subdev. */
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unsigned short v4l2_i2c_subdev_addr(struct v4l2_subdev *sd)
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{
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struct i2c_client *client = v4l2_get_subdevdata(sd);
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return client ? client->addr : I2C_CLIENT_END;
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}
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EXPORT_SYMBOL_GPL(v4l2_i2c_subdev_addr);
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/* Return a list of I2C tuner addresses to probe. Use only if the tuner
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addresses are unknown. */
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const unsigned short *v4l2_i2c_tuner_addrs(enum v4l2_i2c_tuner_type type)
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{
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static const unsigned short radio_addrs[] = {
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#if IS_ENABLED(CONFIG_MEDIA_TUNER_TEA5761)
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0x10,
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#endif
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0x60,
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I2C_CLIENT_END
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};
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static const unsigned short demod_addrs[] = {
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0x42, 0x43, 0x4a, 0x4b,
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I2C_CLIENT_END
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};
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static const unsigned short tv_addrs[] = {
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0x42, 0x43, 0x4a, 0x4b, /* tda8290 */
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0x60, 0x61, 0x62, 0x63, 0x64,
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I2C_CLIENT_END
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};
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switch (type) {
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case ADDRS_RADIO:
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return radio_addrs;
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case ADDRS_DEMOD:
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return demod_addrs;
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case ADDRS_TV:
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return tv_addrs;
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case ADDRS_TV_WITH_DEMOD:
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return tv_addrs + 4;
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}
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return NULL;
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}
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EXPORT_SYMBOL_GPL(v4l2_i2c_tuner_addrs);
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@ -96,16 +96,45 @@ int v4l2_ctrl_query_fill(struct v4l2_queryctrl *qctrl,
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/* ------------------------------------------------------------------------- */
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/* I2C Helper functions */
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struct i2c_driver;
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struct i2c_adapter;
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struct i2c_client;
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struct i2c_device_id;
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struct v4l2_device;
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struct v4l2_subdev;
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struct v4l2_subdev_ops;
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/* I2C Helper functions */
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#include <linux/i2c.h>
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/**
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* enum v4l2_i2c_tuner_type - specifies the range of tuner address that
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* should be used when seeking for I2C devices.
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*
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* @ADDRS_RADIO: Radio tuner addresses.
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* Represent the following I2C addresses:
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* 0x10 (if compiled with tea5761 support)
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* and 0x60.
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* @ADDRS_DEMOD: Demod tuner addresses.
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* Represent the following I2C addresses:
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* 0x42, 0x43, 0x4a and 0x4b.
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* @ADDRS_TV: TV tuner addresses.
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* Represent the following I2C addresses:
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* 0x42, 0x43, 0x4a, 0x4b, 0x60, 0x61, 0x62,
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* 0x63 and 0x64.
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* @ADDRS_TV_WITH_DEMOD: TV tuner addresses if demod is present, this
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* excludes addresses used by the demodulator
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* from the list of candidates.
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* Represent the following I2C addresses:
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* 0x60, 0x61, 0x62, 0x63 and 0x64.
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*
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* NOTE: All I2C addresses above use the 7-bit notation.
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*/
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enum v4l2_i2c_tuner_type {
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ADDRS_RADIO,
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ADDRS_DEMOD,
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ADDRS_TV,
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ADDRS_TV_WITH_DEMOD,
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};
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#if defined(CONFIG_VIDEO_V4L2_I2C)
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/**
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* v4l2_i2c_new_subdev - Load an i2c module and return an initialized
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* &struct v4l2_subdev.
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@ -123,8 +152,6 @@ struct v4l2_subdev *v4l2_i2c_new_subdev(struct v4l2_device *v4l2_dev,
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struct i2c_adapter *adapter, const char *client_type,
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u8 addr, const unsigned short *probe_addrs);
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struct i2c_board_info;
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/**
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* v4l2_i2c_new_subdev_board - Load an i2c module and return an initialized
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* &struct v4l2_subdev.
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@ -174,35 +201,6 @@ void v4l2_i2c_subdev_init(struct v4l2_subdev *sd, struct i2c_client *client,
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*/
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unsigned short v4l2_i2c_subdev_addr(struct v4l2_subdev *sd);
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/**
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* enum v4l2_i2c_tuner_type - specifies the range of tuner address that
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* should be used when seeking for I2C devices.
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*
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* @ADDRS_RADIO: Radio tuner addresses.
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* Represent the following I2C addresses:
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* 0x10 (if compiled with tea5761 support)
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* and 0x60.
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* @ADDRS_DEMOD: Demod tuner addresses.
|
||||
* Represent the following I2C addresses:
|
||||
* 0x42, 0x43, 0x4a and 0x4b.
|
||||
* @ADDRS_TV: TV tuner addresses.
|
||||
* Represent the following I2C addresses:
|
||||
* 0x42, 0x43, 0x4a, 0x4b, 0x60, 0x61, 0x62,
|
||||
* 0x63 and 0x64.
|
||||
* @ADDRS_TV_WITH_DEMOD: TV tuner addresses if demod is present, this
|
||||
* excludes addresses used by the demodulator
|
||||
* from the list of candidates.
|
||||
* Represent the following I2C addresses:
|
||||
* 0x60, 0x61, 0x62, 0x63 and 0x64.
|
||||
*
|
||||
* NOTE: All I2C addresses above use the 7-bit notation.
|
||||
*/
|
||||
enum v4l2_i2c_tuner_type {
|
||||
ADDRS_RADIO,
|
||||
ADDRS_DEMOD,
|
||||
ADDRS_TV,
|
||||
ADDRS_TV_WITH_DEMOD,
|
||||
};
|
||||
/**
|
||||
* v4l2_i2c_tuner_addrs - Return a list of I2C tuner addresses to probe.
|
||||
*
|
||||
@ -213,6 +211,47 @@ enum v4l2_i2c_tuner_type {
|
||||
*/
|
||||
const unsigned short *v4l2_i2c_tuner_addrs(enum v4l2_i2c_tuner_type type);
|
||||
|
||||
#else
|
||||
|
||||
static inline 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)
|
||||
{
|
||||
return NULL;
|
||||
}
|
||||
|
||||
static inline 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)
|
||||
{
|
||||
return NULL;
|
||||
}
|
||||
|
||||
static inline void
|
||||
v4l2_i2c_subdev_set_name(struct v4l2_subdev *sd, struct i2c_client *client,
|
||||
const char *devname, const char *postfix)
|
||||
{}
|
||||
|
||||
static inline void
|
||||
v4l2_i2c_subdev_init(struct v4l2_subdev *sd, struct i2c_client *client,
|
||||
const struct v4l2_subdev_ops *ops)
|
||||
{}
|
||||
|
||||
static inline unsigned short v4l2_i2c_subdev_addr(struct v4l2_subdev *sd)
|
||||
{
|
||||
return I2C_CLIENT_END;
|
||||
}
|
||||
|
||||
static inline const unsigned short *
|
||||
v4l2_i2c_tuner_addrs(enum v4l2_i2c_tuner_type type)
|
||||
{
|
||||
return NULL;
|
||||
}
|
||||
|
||||
#endif
|
||||
|
||||
/* ------------------------------------------------------------------------- */
|
||||
|
||||
/* SPI Helper functions */
|
||||
|
||||
Loading…
Reference in New Issue
Block a user