@@ -11,6 +11,11 @@ config VIDEO_V4L2
select VIDEOBUF2_V4L2 if VIDEOBUF2_CORE
default (I2C || I2C=n) && VIDEO_DEV
+config VIDEO_V4L2_I2C
+ bool
+ depends on I2C && VIDEO_V4L2
+ default y
+
config VIDEO_ADV_DEBUG
bool "Enable advanced debug functionality on V4L2 drivers"
help
@@ -12,6 +12,7 @@ videodev-$(CONFIG_COMPAT) += v4l2-compat-ioctl32.o
videodev-$(CONFIG_TRACEPOINTS) += v4l2-trace.o
videodev-$(CONFIG_MEDIA_CONTROLLER) += v4l2-mc.o
videodev-$(CONFIG_SPI) += v4l2-spi.o
+videodev-$(CONFIG_VIDEO_V4L2_I2C) += v4l2-i2c.o
obj-$(CONFIG_V4L2_FWNODE) += v4l2-fwnode.o
obj-$(CONFIG_VIDEO_V4L2) += videodev.o
@@ -40,7 +40,6 @@
#include <linux/mm.h>
#include <linux/string.h>
#include <linux/errno.h>
-#include <linux/i2c.h>
#include <linux/uaccess.h>
#include <asm/pgtable.h>
#include <asm/io.h>
@@ -88,150 +87,6 @@ int v4l2_ctrl_query_fill(struct v4l2_queryctrl *qctrl, s32 _min, s32 _max, s32 _
}
EXPORT_SYMBOL(v4l2_ctrl_query_fill);
-/* I2C Helper functions */
-
-#if IS_ENABLED(CONFIG_I2C)
-
-void v4l2_i2c_subdev_set_name(struct v4l2_subdev *sd, struct i2c_client *client,
- const char *devname, const char *postfix)
-{
- if (!devname)
- devname = client->dev.driver->name;
- if (!postfix)
- postfix = "";
-
- snprintf(sd->name, sizeof(sd->name), "%s%s %d-%04x", devname, postfix,
- i2c_adapter_id(client->adapter), client->addr);
-}
-EXPORT_SYMBOL_GPL(v4l2_i2c_subdev_set_name);
-
-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);
- v4l2_i2c_subdev_set_name(sd, client, NULL, NULL);
-}
-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));
- strscpy(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) */
-
/* 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
new file mode 100644
@@ -0,0 +1,147 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * v4l2-i2c - I2C helpers for Video4Linux2
+ */
+
+#include <linux/i2c.h>
+#include <linux/module.h>
+#include <media/v4l2-common.h>
+#include <media/v4l2-device.h>
+
+void v4l2_i2c_subdev_set_name(struct v4l2_subdev *sd, struct i2c_client *client,
+ const char *devname, const char *postfix)
+{
+ if (!devname)
+ devname = client->dev.driver->name;
+ if (!postfix)
+ postfix = "";
+
+ snprintf(sd->name, sizeof(sd->name), "%s%s %d-%04x", devname, postfix,
+ i2c_adapter_id(client->adapter), client->addr);
+}
+EXPORT_SYMBOL_GPL(v4l2_i2c_subdev_set_name);
+
+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);
+ v4l2_i2c_subdev_set_name(sd, client, NULL, NULL);
+}
+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));
+ strscpy(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);
@@ -96,16 +96,45 @@ int v4l2_ctrl_query_fill(struct v4l2_queryctrl *qctrl,
/* ------------------------------------------------------------------------- */
-/* I2C Helper functions */
-
-struct i2c_driver;
-struct i2c_adapter;
-struct i2c_client;
-struct i2c_device_id;
struct v4l2_device;
struct v4l2_subdev;
struct v4l2_subdev_ops;
+/* I2C Helper functions */
+#include <linux/i2c.h>
+
+/**
+ * enum v4l2_i2c_tuner_type - specifies the range of tuner address that
+ * should be used when seeking for I2C devices.
+ *
+ * @ADDRS_RADIO: Radio tuner addresses.
+ * Represent the following I2C addresses:
+ * 0x10 (if compiled with tea5761 support)
+ * and 0x60.
+ * @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,
+};
+
+#if defined(CONFIG_VIDEO_V4L2_I2C)
+
/**
* v4l2_i2c_new_subdev - Load an i2c module and return an initialized
* &struct v4l2_subdev.
@@ -123,8 +152,6 @@ 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;
-
/**
* v4l2_i2c_new_subdev_board - Load an i2c module and return an initialized
* &struct v4l2_subdev.
@@ -174,35 +201,6 @@ void v4l2_i2c_subdev_init(struct v4l2_subdev *sd, struct i2c_client *client,
*/
unsigned short v4l2_i2c_subdev_addr(struct v4l2_subdev *sd);
-/**
- * enum v4l2_i2c_tuner_type - specifies the range of tuner address that
- * should be used when seeking for I2C devices.
- *
- * @ADDRS_RADIO: Radio tuner addresses.
- * Represent the following I2C addresses:
- * 0x10 (if compiled with tea5761 support)
- * and 0x60.
- * @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 */
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> --- Changes v2: * None. --- drivers/media/v4l2-core/Kconfig | 5 + drivers/media/v4l2-core/Makefile | 1 + drivers/media/v4l2-core/v4l2-common.c | 145 ------------------------- drivers/media/v4l2-core/v4l2-i2c.c | 147 ++++++++++++++++++++++++++ include/media/v4l2-common.h | 113 +++++++++++++------- 5 files changed, 229 insertions(+), 182 deletions(-) create mode 100644 drivers/media/v4l2-core/v4l2-i2c.c