mirror of https://gitee.com/openkylin/linux.git
V4L/DVB (11367): v4l2-common: remove legacy code
Now that all drivers are converted to v4l2_subdev we can remove legacy code in v4l2-common. Also move the documentation of the internal API to v4l2-subdev.h where it really belongs. Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Hans Verkuil
Mauro Carvalho Chehab
parent
b74c0aac35
commit
78a3b4db2e
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@ -351,17 +351,6 @@ And this to go from an i2c_client to a v4l2_subdev struct:
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struct v4l2_subdev *sd = i2c_get_clientdata(client);
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Finally you need to make a command function to make driver->command()
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call the right subdev_ops functions:
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static int subdev_command(struct i2c_client *client, unsigned cmd, void *arg)
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{
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return v4l2_subdev_command(i2c_get_clientdata(client), cmd, arg);
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}
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If driver->command is never used then you can leave this out. Eventually the
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driver->command usage should be removed from v4l.
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Make sure to call v4l2_device_unregister_subdev(sd) when the remove() callback
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is called. This will unregister the sub-device from the bridge driver. It is
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safe to call this even if the sub-device was never registered.
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@ -739,33 +739,8 @@ EXPORT_SYMBOL(v4l2_chip_ident_i2c_client);
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/* ----------------------------------------------------------------- */
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/* Helper function for I2C legacy drivers */
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/* I2C Helper functions */
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int v4l2_i2c_attach(struct i2c_adapter *adapter, int address, struct i2c_driver *driver,
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const char *name,
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int (*probe)(struct i2c_client *, const struct i2c_device_id *))
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{
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struct i2c_client *client;
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int err;
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client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
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if (!client)
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return -ENOMEM;
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client->addr = address;
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client->adapter = adapter;
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client->driver = driver;
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strlcpy(client->name, name, sizeof(client->name));
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err = probe(client, NULL);
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if (err == 0) {
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i2c_attach_client(client);
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} else {
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kfree(client);
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}
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return err != -ENOMEM ? 0 : err;
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}
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EXPORT_SYMBOL(v4l2_i2c_attach);
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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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@ -275,32 +275,6 @@ static const char *v4l2_ioctls[] = {
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};
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#define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls)
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static const char *v4l2_int_ioctls[] = {
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[_IOC_NR(AUDC_SET_RADIO)] = "AUDC_SET_RADIO",
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[_IOC_NR(TUNER_SET_TYPE_ADDR)] = "TUNER_SET_TYPE_ADDR",
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[_IOC_NR(TUNER_SET_STANDBY)] = "TUNER_SET_STANDBY",
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[_IOC_NR(TUNER_SET_CONFIG)] = "TUNER_SET_CONFIG",
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[_IOC_NR(VIDIOC_INT_S_TUNER_MODE)] = "VIDIOC_INT_S_TUNER_MODE",
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[_IOC_NR(VIDIOC_INT_RESET)] = "VIDIOC_INT_RESET",
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[_IOC_NR(VIDIOC_INT_AUDIO_CLOCK_FREQ)] = "VIDIOC_INT_AUDIO_CLOCK_FREQ",
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[_IOC_NR(VIDIOC_INT_DECODE_VBI_LINE)] = "VIDIOC_INT_DECODE_VBI_LINE",
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[_IOC_NR(VIDIOC_INT_S_VBI_DATA)] = "VIDIOC_INT_S_VBI_DATA",
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[_IOC_NR(VIDIOC_INT_G_VBI_DATA)] = "VIDIOC_INT_G_VBI_DATA",
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[_IOC_NR(VIDIOC_INT_I2S_CLOCK_FREQ)] = "VIDIOC_INT_I2S_CLOCK_FREQ",
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[_IOC_NR(VIDIOC_INT_S_STANDBY)] = "VIDIOC_INT_S_STANDBY",
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[_IOC_NR(VIDIOC_INT_S_AUDIO_ROUTING)] = "VIDIOC_INT_S_AUDIO_ROUTING",
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[_IOC_NR(VIDIOC_INT_G_AUDIO_ROUTING)] = "VIDIOC_INT_G_AUDIO_ROUTING",
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[_IOC_NR(VIDIOC_INT_S_VIDEO_ROUTING)] = "VIDIOC_INT_S_VIDEO_ROUTING",
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[_IOC_NR(VIDIOC_INT_G_VIDEO_ROUTING)] = "VIDIOC_INT_G_VIDEO_ROUTING",
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[_IOC_NR(VIDIOC_INT_S_CRYSTAL_FREQ)] = "VIDIOC_INT_S_CRYSTAL_FREQ",
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[_IOC_NR(VIDIOC_INT_INIT)] = "VIDIOC_INT_INIT",
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[_IOC_NR(VIDIOC_INT_G_STD_OUTPUT)] = "VIDIOC_INT_G_STD_OUTPUT",
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[_IOC_NR(VIDIOC_INT_S_STD_OUTPUT)] = "VIDIOC_INT_S_STD_OUTPUT",
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};
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#define V4L2_INT_IOCTLS ARRAY_SIZE(v4l2_int_ioctls)
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/* Common ioctl debug function. This function can be used by
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external ioctl messages as well as internal V4L ioctl */
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void v4l_printk_ioctl(unsigned int cmd)
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@ -309,12 +283,8 @@ void v4l_printk_ioctl(unsigned int cmd)
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switch (_IOC_TYPE(cmd)) {
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case 'd':
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if (_IOC_NR(cmd) >= V4L2_INT_IOCTLS) {
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type = "v4l2_int";
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break;
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}
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printk("%s", v4l2_int_ioctls[_IOC_NR(cmd)]);
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return;
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type = "v4l2_int";
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break;
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#ifdef CONFIG_VIDEO_V4L1_COMPAT
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case 'v':
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if (_IOC_NR(cmd) >= V4L1_IOCTLS) {
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@ -125,7 +125,7 @@ int v4l2_chip_match_host(const struct v4l2_dbg_match *match);
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/* ------------------------------------------------------------------------- */
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/* Helper function for I2C legacy drivers */
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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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@ -135,9 +135,6 @@ struct v4l2_device;
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struct v4l2_subdev;
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struct v4l2_subdev_ops;
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int v4l2_i2c_attach(struct i2c_adapter *adapter, int address, struct i2c_driver *driver,
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const char *name,
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int (*probe)(struct i2c_client *, const struct i2c_device_id *));
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/* Load an i2c module and return an initialized v4l2_subdev struct.
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Only call request_module if module_name != NULL.
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@ -171,139 +168,25 @@ const unsigned short *v4l2_i2c_tuner_addrs(enum v4l2_i2c_tuner_type type);
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/* ------------------------------------------------------------------------- */
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/* Internal ioctls */
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/* VIDIOC_INT_DECODE_VBI_LINE */
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struct v4l2_decode_vbi_line {
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u32 is_second_field; /* Set to 0 for the first (odd) field,
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set to 1 for the second (even) field. */
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u8 *p; /* Pointer to the sliced VBI data from the decoder.
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On exit points to the start of the payload. */
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u32 line; /* Line number of the sliced VBI data (1-23) */
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u32 type; /* VBI service type (V4L2_SLICED_*). 0 if no service found */
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};
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/* Note: these remaining ioctls should be removed as well, but they are still
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used in tuner-simple.c (TUNER_SET_CONFIG) and cx18/ivtv (RESET and
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S_AUDIO_ROUTING). To remove these ioctls some more cleanup is needed in
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those modules. */
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/* s_config */
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struct v4l2_priv_tun_config {
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int tuner;
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void *priv;
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};
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/* audio ioctls */
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/* v4l device was opened in Radio mode, to be replaced by VIDIOC_INT_S_TUNER_MODE */
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#define AUDC_SET_RADIO _IO('d',88)
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/* tuner ioctls */
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/* Sets tuner type and its I2C addr */
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#define TUNER_SET_TYPE_ADDR _IOW('d', 90, int)
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/* Puts tuner on powersaving state, disabling it, except for i2c. To be replaced
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by VIDIOC_INT_S_STANDBY. */
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#define TUNER_SET_STANDBY _IOW('d', 91, int)
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/* Sets tda9887 specific stuff, like port1, port2 and qss */
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#define TUNER_SET_CONFIG _IOW('d', 92, struct v4l2_priv_tun_config)
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/* Switch the tuner to a specific tuner mode. Replacement of AUDC_SET_RADIO */
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#define VIDIOC_INT_S_TUNER_MODE _IOW('d', 93, enum v4l2_tuner_type)
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/* Generic standby command. Passing -1 (all bits set to 1) will put the whole
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chip into standby mode, value 0 will make the chip fully active. Specific
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bits can be used by certain chips to enable/disable specific subsystems.
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Replacement of TUNER_SET_STANDBY. */
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#define VIDIOC_INT_S_STANDBY _IOW('d', 94, u32)
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/* 100, 101 used by VIDIOC_DBG_[SG]_REGISTER */
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/* Generic reset command. The argument selects which subsystems to reset.
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Passing 0 will always reset the whole chip. */
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#define VIDIOC_INT_RESET _IOW ('d', 102, u32)
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/* Set the frequency (in Hz) of the audio clock output.
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Used to slave an audio processor to the video decoder, ensuring that audio
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and video remain synchronized.
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Usual values for the frequency are 48000, 44100 or 32000 Hz.
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If the frequency is not supported, then -EINVAL is returned. */
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#define VIDIOC_INT_AUDIO_CLOCK_FREQ _IOW ('d', 103, u32)
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/* Video decoders that support sliced VBI need to implement this ioctl.
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Field p of the v4l2_sliced_vbi_line struct is set to the start of the VBI
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data that was generated by the decoder. The driver then parses the sliced
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VBI data and sets the other fields in the struct accordingly. The pointer p
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is updated to point to the start of the payload which can be copied
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verbatim into the data field of the v4l2_sliced_vbi_data struct. If no
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valid VBI data was found, then the type field is set to 0 on return. */
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#define VIDIOC_INT_DECODE_VBI_LINE _IOWR('d', 104, struct v4l2_decode_vbi_line)
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/* Used to generate VBI signals on a video signal. v4l2_sliced_vbi_data is
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filled with the data packets that should be output. Note that if you set
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the line field to 0, then that VBI signal is disabled. If no
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valid VBI data was found, then the type field is set to 0 on return. */
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#define VIDIOC_INT_S_VBI_DATA _IOW ('d', 105, struct v4l2_sliced_vbi_data)
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/* Used to obtain the sliced VBI packet from a readback register. Not all
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video decoders support this. If no data is available because the readback
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register contains invalid or erroneous data -EIO is returned. Note that
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you must fill in the 'id' member and the 'field' member (to determine
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whether CC data from the first or second field should be obtained). */
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#define VIDIOC_INT_G_VBI_DATA _IOWR('d', 106, struct v4l2_sliced_vbi_data)
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/* Sets I2S speed in bps. This is used to provide a standard way to select I2S
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clock used by driving digital audio streams at some board designs.
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Usual values for the frequency are 1024000 and 2048000.
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If the frequency is not supported, then -EINVAL is returned. */
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#define VIDIOC_INT_I2S_CLOCK_FREQ _IOW ('d', 108, u32)
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/* Routing definition, device dependent. It specifies which inputs (if any)
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should be routed to which outputs (if any). */
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/* s_routing: routing definition, device dependent. It specifies which inputs
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(if any) should be routed to which outputs (if any). */
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struct v4l2_routing {
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u32 input;
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u32 output;
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};
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/* These internal commands should be used to define the inputs and outputs
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of an audio/video chip. They will replace the v4l2 API commands
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VIDIOC_S/G_INPUT, VIDIOC_S/G_OUTPUT, VIDIOC_S/G_AUDIO and VIDIOC_S/G_AUDOUT
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that are meant to be used by the user.
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The internal commands should be used to switch inputs/outputs
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because only the driver knows how to map a 'Television' input to the precise
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input/output routing of an A/D converter, or a DSP, or a video digitizer.
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These four commands should only be sent directly to an i2c device, they
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should not be broadcast as the routing is very device specific. */
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#define VIDIOC_INT_S_AUDIO_ROUTING _IOW ('d', 109, struct v4l2_routing)
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#define VIDIOC_INT_G_AUDIO_ROUTING _IOR ('d', 110, struct v4l2_routing)
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#define VIDIOC_INT_S_VIDEO_ROUTING _IOW ('d', 111, struct v4l2_routing)
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#define VIDIOC_INT_G_VIDEO_ROUTING _IOR ('d', 112, struct v4l2_routing)
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struct v4l2_crystal_freq {
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u32 freq; /* frequency in Hz of the crystal */
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u32 flags; /* device specific flags */
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};
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/* Sets the frequency of the crystal used to generate the clocks.
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An extra flags field allows device specific configuration regarding
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clock frequency dividers, etc. If not used, then set flags to 0.
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If the frequency is not supported, then -EINVAL is returned. */
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#define VIDIOC_INT_S_CRYSTAL_FREQ _IOW('d', 113, struct v4l2_crystal_freq)
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/* Initialize the sensor registors to some sort of reasonable
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default values. */
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#define VIDIOC_INT_INIT _IOW('d', 114, u32)
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/* Set v4l2_std_id for video OUTPUT devices. This is ignored by
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video input devices. */
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#define VIDIOC_INT_S_STD_OUTPUT _IOW('d', 115, v4l2_std_id)
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/* Get v4l2_std_id for video OUTPUT devices. This is ignored by
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video input devices. */
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#define VIDIOC_INT_G_STD_OUTPUT _IOW('d', 116, v4l2_std_id)
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/* Set GPIO pins. Very simple right now, might need to be extended with
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a v4l2_gpio struct if a direction is also needed. */
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#define VIDIOC_INT_S_GPIO _IOW('d', 117, u32)
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/* Get input status. Same as the status field in the v4l2_input struct. */
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#define VIDIOC_INT_G_INPUT_STATUS _IOR('d', 118, u32)
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#define VIDIOC_INT_RESET _IOW ('d', 102, u32)
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#endif /* V4L2_COMMON_H_ */
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@ -27,6 +27,22 @@ struct v4l2_device;
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struct v4l2_subdev;
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struct tuner_setup;
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/* decode_vbi_line */
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struct v4l2_decode_vbi_line {
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u32 is_second_field; /* Set to 0 for the first (odd) field,
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set to 1 for the second (even) field. */
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u8 *p; /* Pointer to the sliced VBI data from the decoder.
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On exit points to the start of the payload. */
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u32 line; /* Line number of the sliced VBI data (1-23) */
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u32 type; /* VBI service type (V4L2_SLICED_*). 0 if no service found */
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};
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/* s_crystal_freq */
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struct v4l2_crystal_freq {
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u32 freq; /* frequency in Hz of the crystal */
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u32 flags; /* device specific flags */
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};
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/* Sub-devices are devices that are connected somehow to the main bridge
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device. These devices are usually audio/video muxers/encoders/decoders or
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sensors and webcam controllers.
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@ -68,6 +84,21 @@ struct tuner_setup;
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the use-case it might be better to use subdev-specific ops (currently
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not yet implemented) since ops provide proper type-checking.
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*/
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/* init: initialize the sensor registors to some sort of reasonable default
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values. Do not use for new drivers and should be removed in existing
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drivers.
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reset: generic reset command. The argument selects which subsystems to
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reset. Passing 0 will always reset the whole chip. Do not use for new
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drivers without discussing this first on the linux-media mailinglist.
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There should be no reason normally to reset a device.
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s_gpio: set GPIO pins. Very simple right now, might need to be extended with
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a direction argument if needed.
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s_standby: puts tuner on powersaving state, disabling it, except for i2c.
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*/
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struct v4l2_subdev_core_ops {
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int (*g_chip_ident)(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip);
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int (*log_status)(struct v4l2_subdev *sd);
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@ -89,6 +120,14 @@ struct v4l2_subdev_core_ops {
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#endif
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};
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/* s_mode: switch the tuner to a specific tuner mode. Replacement of s_radio.
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s_radio: v4l device was opened in Radio mode, to be replaced by s_mode.
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s_type_addr: sets tuner type and its I2C addr.
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s_config: sets tda9887 specific stuff, like port1, port2 and qss
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*/
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struct v4l2_subdev_tuner_ops {
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int (*s_mode)(struct v4l2_subdev *sd, enum v4l2_tuner_type);
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int (*s_radio)(struct v4l2_subdev *sd);
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@ -101,12 +140,68 @@ struct v4l2_subdev_tuner_ops {
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int (*s_config)(struct v4l2_subdev *sd, const struct v4l2_priv_tun_config *config);
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};
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/* s_clock_freq: set the frequency (in Hz) of the audio clock output.
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Used to slave an audio processor to the video decoder, ensuring that
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audio and video remain synchronized. Usual values for the frequency
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are 48000, 44100 or 32000 Hz. If the frequency is not supported, then
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-EINVAL is returned.
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s_i2s_clock_freq: sets I2S speed in bps. This is used to provide a standard
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way to select I2S clock used by driving digital audio streams at some
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board designs. Usual values for the frequency are 1024000 and 2048000.
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If the frequency is not supported, then -EINVAL is returned.
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s_routing: used to define the input and/or output pins of an audio chip.
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Never attempt to use user-level input IDs (e.g. Composite, S-Video,
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Tuner) at this level. An i2c device shouldn't know about whether an
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input pin is connected to a Composite connector, become on another
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board or platform it might be connected to something else entirely.
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The calling driver is responsible for mapping a user-level input to
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the right pins on the i2c device.
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*/
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struct v4l2_subdev_audio_ops {
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int (*s_clock_freq)(struct v4l2_subdev *sd, u32 freq);
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int (*s_i2s_clock_freq)(struct v4l2_subdev *sd, u32 freq);
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int (*s_routing)(struct v4l2_subdev *sd, const struct v4l2_routing *route);
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};
|
||||
|
||||
/*
|
||||
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);
|
||||
|
|
@ -163,18 +258,6 @@ static inline void *v4l2_get_subdevdata(const struct v4l2_subdev *sd)
|
|||
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)
|
||||
{
|
||||
|
|
|
|||
Loading…
Reference in New Issue