struct v4l2_subdev *sd = i2c_get_clientdata(client);
-Finally you need to make a command function to make driver->command()
-call the right subdev_ops functions:
-
-static int subdev_command(struct i2c_client *client, unsigned cmd, void *arg)
-{
- return v4l2_subdev_command(i2c_get_clientdata(client), cmd, arg);
-}
-
-If driver->command is never used then you can leave this out. Eventually the
-driver->command usage should be removed from v4l.
-
Make sure to call v4l2_device_unregister_subdev(sd) when the remove() callback
is called. This will unregister the sub-device from the bridge driver. It is
safe to call this even if the sub-device was never registered.
/* ----------------------------------------------------------------- */
-/* Helper function for I2C legacy drivers */
+/* I2C Helper functions */
-int v4l2_i2c_attach(struct i2c_adapter *adapter, int address, struct i2c_driver *driver,
- const char *name,
- int (*probe)(struct i2c_client *, const struct i2c_device_id *))
-{
- struct i2c_client *client;
- int err;
-
- client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
- if (!client)
- return -ENOMEM;
-
- client->addr = address;
- client->adapter = adapter;
- client->driver = driver;
- strlcpy(client->name, name, sizeof(client->name));
-
- err = probe(client, NULL);
- if (err == 0) {
- i2c_attach_client(client);
- } else {
- kfree(client);
- }
- return err != -ENOMEM ? 0 : err;
-}
-EXPORT_SYMBOL(v4l2_i2c_attach);
void v4l2_i2c_subdev_init(struct v4l2_subdev *sd, struct i2c_client *client,
const struct v4l2_subdev_ops *ops)
};
#define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls)
-static const char *v4l2_int_ioctls[] = {
- [_IOC_NR(AUDC_SET_RADIO)] = "AUDC_SET_RADIO",
-
- [_IOC_NR(TUNER_SET_TYPE_ADDR)] = "TUNER_SET_TYPE_ADDR",
- [_IOC_NR(TUNER_SET_STANDBY)] = "TUNER_SET_STANDBY",
- [_IOC_NR(TUNER_SET_CONFIG)] = "TUNER_SET_CONFIG",
-
- [_IOC_NR(VIDIOC_INT_S_TUNER_MODE)] = "VIDIOC_INT_S_TUNER_MODE",
- [_IOC_NR(VIDIOC_INT_RESET)] = "VIDIOC_INT_RESET",
- [_IOC_NR(VIDIOC_INT_AUDIO_CLOCK_FREQ)] = "VIDIOC_INT_AUDIO_CLOCK_FREQ",
- [_IOC_NR(VIDIOC_INT_DECODE_VBI_LINE)] = "VIDIOC_INT_DECODE_VBI_LINE",
- [_IOC_NR(VIDIOC_INT_S_VBI_DATA)] = "VIDIOC_INT_S_VBI_DATA",
- [_IOC_NR(VIDIOC_INT_G_VBI_DATA)] = "VIDIOC_INT_G_VBI_DATA",
- [_IOC_NR(VIDIOC_INT_I2S_CLOCK_FREQ)] = "VIDIOC_INT_I2S_CLOCK_FREQ",
- [_IOC_NR(VIDIOC_INT_S_STANDBY)] = "VIDIOC_INT_S_STANDBY",
- [_IOC_NR(VIDIOC_INT_S_AUDIO_ROUTING)] = "VIDIOC_INT_S_AUDIO_ROUTING",
- [_IOC_NR(VIDIOC_INT_G_AUDIO_ROUTING)] = "VIDIOC_INT_G_AUDIO_ROUTING",
- [_IOC_NR(VIDIOC_INT_S_VIDEO_ROUTING)] = "VIDIOC_INT_S_VIDEO_ROUTING",
- [_IOC_NR(VIDIOC_INT_G_VIDEO_ROUTING)] = "VIDIOC_INT_G_VIDEO_ROUTING",
- [_IOC_NR(VIDIOC_INT_S_CRYSTAL_FREQ)] = "VIDIOC_INT_S_CRYSTAL_FREQ",
- [_IOC_NR(VIDIOC_INT_INIT)] = "VIDIOC_INT_INIT",
- [_IOC_NR(VIDIOC_INT_G_STD_OUTPUT)] = "VIDIOC_INT_G_STD_OUTPUT",
- [_IOC_NR(VIDIOC_INT_S_STD_OUTPUT)] = "VIDIOC_INT_S_STD_OUTPUT",
-};
-#define V4L2_INT_IOCTLS ARRAY_SIZE(v4l2_int_ioctls)
-
/* Common ioctl debug function. This function can be used by
external ioctl messages as well as internal V4L ioctl */
void v4l_printk_ioctl(unsigned int cmd)
switch (_IOC_TYPE(cmd)) {
case 'd':
- if (_IOC_NR(cmd) >= V4L2_INT_IOCTLS) {
- type = "v4l2_int";
- break;
- }
- printk("%s", v4l2_int_ioctls[_IOC_NR(cmd)]);
- return;
+ type = "v4l2_int";
+ break;
#ifdef CONFIG_VIDEO_V4L1_COMPAT
case 'v':
if (_IOC_NR(cmd) >= V4L1_IOCTLS) {
/* ------------------------------------------------------------------------- */
-/* Helper function for I2C legacy drivers */
+/* I2C Helper functions */
struct i2c_driver;
struct i2c_adapter;
struct v4l2_subdev;
struct v4l2_subdev_ops;
-int v4l2_i2c_attach(struct i2c_adapter *adapter, int address, struct i2c_driver *driver,
- const char *name,
- int (*probe)(struct i2c_client *, const struct i2c_device_id *));
/* Load an i2c module and return an initialized v4l2_subdev struct.
Only call request_module if module_name != NULL.
/* ------------------------------------------------------------------------- */
-/* Internal ioctls */
-
-/* VIDIOC_INT_DECODE_VBI_LINE */
-struct v4l2_decode_vbi_line {
- u32 is_second_field; /* Set to 0 for the first (odd) field,
- set to 1 for the second (even) field. */
- u8 *p; /* Pointer to the sliced VBI data from the decoder.
- On exit points to the start of the payload. */
- u32 line; /* Line number of the sliced VBI data (1-23) */
- u32 type; /* VBI service type (V4L2_SLICED_*). 0 if no service found */
-};
+/* Note: these remaining ioctls should be removed as well, but they are still
+ used in tuner-simple.c (TUNER_SET_CONFIG) and cx18/ivtv (RESET and
+ S_AUDIO_ROUTING). To remove these ioctls some more cleanup is needed in
+ those modules. */
+/* s_config */
struct v4l2_priv_tun_config {
int tuner;
void *priv;
};
-
-/* audio ioctls */
-
-/* v4l device was opened in Radio mode, to be replaced by VIDIOC_INT_S_TUNER_MODE */
-#define AUDC_SET_RADIO _IO('d',88)
-
-/* tuner ioctls */
-
-/* Sets tuner type and its I2C addr */
-#define TUNER_SET_TYPE_ADDR _IOW('d', 90, int)
-
-/* Puts tuner on powersaving state, disabling it, except for i2c. To be replaced
- by VIDIOC_INT_S_STANDBY. */
-#define TUNER_SET_STANDBY _IOW('d', 91, int)
-
-/* Sets tda9887 specific stuff, like port1, port2 and qss */
#define TUNER_SET_CONFIG _IOW('d', 92, struct v4l2_priv_tun_config)
-/* Switch the tuner to a specific tuner mode. Replacement of AUDC_SET_RADIO */
-#define VIDIOC_INT_S_TUNER_MODE _IOW('d', 93, enum v4l2_tuner_type)
-
-/* Generic standby command. Passing -1 (all bits set to 1) will put the whole
- chip into standby mode, value 0 will make the chip fully active. Specific
- bits can be used by certain chips to enable/disable specific subsystems.
- Replacement of TUNER_SET_STANDBY. */
-#define VIDIOC_INT_S_STANDBY _IOW('d', 94, u32)
-
-/* 100, 101 used by VIDIOC_DBG_[SG]_REGISTER */
-
-/* Generic reset command. The argument selects which subsystems to reset.
- Passing 0 will always reset the whole chip. */
-#define VIDIOC_INT_RESET _IOW ('d', 102, u32)
-
-/* Set the frequency (in Hz) of the audio clock output.
- Used to slave an audio processor to the video decoder, ensuring that audio
- and video remain synchronized.
- Usual values for the frequency are 48000, 44100 or 32000 Hz.
- If the frequency is not supported, then -EINVAL is returned. */
-#define VIDIOC_INT_AUDIO_CLOCK_FREQ _IOW ('d', 103, u32)
-
-/* Video decoders that support sliced VBI need to implement this ioctl.
- Field p of the v4l2_sliced_vbi_line struct is set to the start of the VBI
- data that was generated by the decoder. The driver then parses the sliced
- VBI data and sets the other fields in the struct accordingly. The pointer p
- is updated to point to the start of the payload which can be copied
- verbatim into the data field of the v4l2_sliced_vbi_data struct. If no
- valid VBI data was found, then the type field is set to 0 on return. */
-#define VIDIOC_INT_DECODE_VBI_LINE _IOWR('d', 104, struct v4l2_decode_vbi_line)
-
-/* Used to generate VBI signals on a video signal. v4l2_sliced_vbi_data is
- filled with the data packets that should be output. Note that if you set
- the line field to 0, then that VBI signal is disabled. If no
- valid VBI data was found, then the type field is set to 0 on return. */
-#define VIDIOC_INT_S_VBI_DATA _IOW ('d', 105, struct v4l2_sliced_vbi_data)
-
-/* Used to obtain the sliced VBI packet from a readback register. Not all
- video decoders support this. If no data is available because the readback
- register contains invalid or erroneous data -EIO is returned. Note that
- you must fill in the 'id' member and the 'field' member (to determine
- whether CC data from the first or second field should be obtained). */
-#define VIDIOC_INT_G_VBI_DATA _IOWR('d', 106, struct v4l2_sliced_vbi_data)
-
-/* Sets I2S speed in bps. This is used to provide a standard way to select I2S
- clock used by driving digital audio streams at some board designs.
- Usual values for the frequency are 1024000 and 2048000.
- If the frequency is not supported, then -EINVAL is returned. */
-#define VIDIOC_INT_I2S_CLOCK_FREQ _IOW ('d', 108, u32)
-
-/* Routing definition, device dependent. It specifies which inputs (if any)
- should be routed to which outputs (if any). */
+/* s_routing: routing definition, device dependent. It specifies which inputs
+ (if any) should be routed to which outputs (if any). */
struct v4l2_routing {
u32 input;
u32 output;
};
-
-/* These internal commands should be used to define the inputs and outputs
- of an audio/video chip. They will replace the v4l2 API commands
- VIDIOC_S/G_INPUT, VIDIOC_S/G_OUTPUT, VIDIOC_S/G_AUDIO and VIDIOC_S/G_AUDOUT
- that are meant to be used by the user.
- The internal commands should be used to switch inputs/outputs
- because only the driver knows how to map a 'Television' input to the precise
- input/output routing of an A/D converter, or a DSP, or a video digitizer.
- These four commands should only be sent directly to an i2c device, they
- should not be broadcast as the routing is very device specific. */
#define VIDIOC_INT_S_AUDIO_ROUTING _IOW ('d', 109, struct v4l2_routing)
-#define VIDIOC_INT_G_AUDIO_ROUTING _IOR ('d', 110, struct v4l2_routing)
-#define VIDIOC_INT_S_VIDEO_ROUTING _IOW ('d', 111, struct v4l2_routing)
-#define VIDIOC_INT_G_VIDEO_ROUTING _IOR ('d', 112, struct v4l2_routing)
-
-struct v4l2_crystal_freq {
- u32 freq; /* frequency in Hz of the crystal */
- u32 flags; /* device specific flags */
-};
-
-/* Sets the frequency of the crystal used to generate the clocks.
- An extra flags field allows device specific configuration regarding
- clock frequency dividers, etc. If not used, then set flags to 0.
- If the frequency is not supported, then -EINVAL is returned. */
-#define VIDIOC_INT_S_CRYSTAL_FREQ _IOW('d', 113, struct v4l2_crystal_freq)
-
-/* Initialize the sensor registors to some sort of reasonable
- default values. */
-#define VIDIOC_INT_INIT _IOW('d', 114, u32)
-
-/* Set v4l2_std_id for video OUTPUT devices. This is ignored by
- video input devices. */
-#define VIDIOC_INT_S_STD_OUTPUT _IOW('d', 115, v4l2_std_id)
-
-/* Get v4l2_std_id for video OUTPUT devices. This is ignored by
- video input devices. */
-#define VIDIOC_INT_G_STD_OUTPUT _IOW('d', 116, v4l2_std_id)
-
-/* Set GPIO pins. Very simple right now, might need to be extended with
- a v4l2_gpio struct if a direction is also needed. */
-#define VIDIOC_INT_S_GPIO _IOW('d', 117, u32)
-
-/* Get input status. Same as the status field in the v4l2_input struct. */
-#define VIDIOC_INT_G_INPUT_STATUS _IOR('d', 118, u32)
+#define VIDIOC_INT_RESET _IOW ('d', 102, u32)
#endif /* V4L2_COMMON_H_ */
struct v4l2_subdev;
struct tuner_setup;
+/* decode_vbi_line */
+struct v4l2_decode_vbi_line {
+ u32 is_second_field; /* Set to 0 for the first (odd) field,
+ set to 1 for the second (even) field. */
+ u8 *p; /* Pointer to the sliced VBI data from the decoder.
+ On exit points to the start of the payload. */
+ u32 line; /* Line number of the sliced VBI data (1-23) */
+ u32 type; /* VBI service type (V4L2_SLICED_*). 0 if no service found */
+};
+
+/* s_crystal_freq */
+struct v4l2_crystal_freq {
+ u32 freq; /* frequency in Hz of the crystal */
+ u32 flags; /* device specific flags */
+};
+
/* Sub-devices are devices that are connected somehow to the main bridge
device. These devices are usually audio/video muxers/encoders/decoders or
sensors and webcam controllers.
the use-case it might be better to use subdev-specific ops (currently
not yet implemented) since ops provide proper type-checking.
*/
+
+/* init: initialize the sensor registors to some sort of reasonable default
+ values. Do not use for new drivers and should be removed in existing
+ drivers.
+
+ reset: generic reset command. The argument selects which subsystems to
+ reset. Passing 0 will always reset the whole chip. Do not use for new
+ drivers without discussing this first on the linux-media mailinglist.
+ There should be no reason normally to reset a device.
+
+ s_gpio: set GPIO pins. Very simple right now, might need to be extended with
+ a direction argument if needed.
+
+ s_standby: puts tuner on powersaving state, disabling it, except for i2c.
+ */
struct v4l2_subdev_core_ops {
int (*g_chip_ident)(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip);
int (*log_status)(struct v4l2_subdev *sd);
#endif
};
+/* s_mode: switch the tuner to a specific tuner mode. Replacement of s_radio.
+
+ s_radio: v4l device was opened in Radio mode, to be replaced by s_mode.
+
+ s_type_addr: sets tuner type and its I2C addr.
+
+ s_config: sets tda9887 specific stuff, like port1, port2 and qss
+ */
struct v4l2_subdev_tuner_ops {
int (*s_mode)(struct v4l2_subdev *sd, enum v4l2_tuner_type);
int (*s_radio)(struct v4l2_subdev *sd);
int (*s_config)(struct v4l2_subdev *sd, const struct v4l2_priv_tun_config *config);
};
+/* s_clock_freq: set the frequency (in Hz) of the audio clock output.
+ Used to slave an audio processor to the video decoder, ensuring that
+ audio and video remain synchronized. Usual values for the frequency
+ are 48000, 44100 or 32000 Hz. If the frequency is not supported, then
+ -EINVAL is returned.
+
+ s_i2s_clock_freq: sets I2S speed in bps. This is used to provide a standard
+ way to select I2S clock used by driving digital audio streams at some
+ board designs. Usual values for the frequency are 1024000 and 2048000.
+ If the frequency is not supported, then -EINVAL is returned.
+
+ s_routing: used to define the input and/or output pins of an audio chip.
+ Never attempt to use user-level input IDs (e.g. Composite, S-Video,
+ Tuner) at this level. An i2c device shouldn't know about whether an
+ input pin is connected to a Composite connector, become on another
+ board or platform it might be connected to something else entirely.
+ The calling driver is responsible for mapping a user-level input to
+ the right pins on the i2c device.
+ */
struct v4l2_subdev_audio_ops {
int (*s_clock_freq)(struct v4l2_subdev *sd, u32 freq);
int (*s_i2s_clock_freq)(struct v4l2_subdev *sd, u32 freq);
int (*s_routing)(struct v4l2_subdev *sd, const struct v4l2_routing *route);
};
+/*
+ decode_vbi_line: video decoders that support sliced VBI need to implement
+ this ioctl. Field p of the v4l2_sliced_vbi_line struct is set to the
+ start of the VBI data that was generated by the decoder. The driver
+ then parses the sliced VBI data and sets the other fields in the
+ struct accordingly. The pointer p is updated to point to the start of
+ the payload which can be copied verbatim into the data field of the
+ v4l2_sliced_vbi_data struct. If no valid VBI data was found, then the
+ type field is set to 0 on return.
+
+ s_vbi_data: used to generate VBI signals on a video signal.
+ v4l2_sliced_vbi_data is filled with the data packets that should be
+ output. Note that if you set the line field to 0, then that VBI signal
+ is disabled. If no valid VBI data was found, then the type field is
+ set to 0 on return.
+
+ g_vbi_data: used to obtain the sliced VBI packet from a readback register.
+ Not all video decoders support this. If no data is available because
+ the readback register contains invalid or erroneous data -EIO is
+ returned. Note that you must fill in the 'id' member and the 'field'
+ member (to determine whether CC data from the first or second field
+ should be obtained).
+
+ s_std_output: set v4l2_std_id for video OUTPUT devices. This is ignored by
+ video input devices.
+
+ s_crystal_freq: sets the frequency of the crystal used to generate the
+ clocks. An extra flags field allows device specific configuration
+ regarding clock frequency dividers, etc. If not used, then set flags
+ to 0. If the frequency is not supported, then -EINVAL is returned.
+
+ g_input_status: get input status. Same as the status field in the v4l2_input
+ struct.
+
+ s_routing: see s_routing in audio_ops, except this version is for video
+ devices.
+ */
struct v4l2_subdev_video_ops {
int (*s_routing)(struct v4l2_subdev *sd, const struct v4l2_routing *route);
int (*s_crystal_freq)(struct v4l2_subdev *sd, struct v4l2_crystal_freq *freq);
return sd->priv;
}
-/* Convert an ioctl-type command to the proper v4l2_subdev_ops function call.
- This is used by subdev modules that can be called by both old-style ioctl
- commands and through the v4l2_subdev_ops.
-
- The ioctl API of the subdev driver can call this function to call the
- right ops based on the ioctl cmd and arg.
-
- Once all subdev drivers have been converted and all drivers no longer
- use the ioctl interface, then this function can be removed.
- */
-int v4l2_subdev_command(struct v4l2_subdev *sd, unsigned cmd, void *arg);
-
static inline void v4l2_subdev_init(struct v4l2_subdev *sd,
const struct v4l2_subdev_ops *ops)
{
projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / commitdiff