[media] radio-mr800: cleanup and have it comply to the V4L2 API
Implement the control framework and update to the latest V4L2 framework.
The v4l2-compliance tool now runs without errors.
Fixed bad g/s_tuner handling with respect to mono/stereo.
Support control events.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/media/radio/radio-mr800.c b/drivers/media/radio/radio-mr800.c
index a860a72..0a96eda 100644
--- a/drivers/media/radio/radio-mr800.c
+++ b/drivers/media/radio/radio-mr800.c
@@ -62,6 +62,8 @@
#include <linux/videodev2.h>
#include <media/v4l2-device.h>
#include <media/v4l2-ioctl.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-event.h>
#include <linux/usb.h>
#include <linux/mutex.h>
@@ -117,29 +119,20 @@
module_param(radio_nr, int, 0);
MODULE_PARM_DESC(radio_nr, "Radio Nr");
-static int usb_amradio_probe(struct usb_interface *intf,
- const struct usb_device_id *id);
-static void usb_amradio_disconnect(struct usb_interface *intf);
-static int usb_amradio_open(struct file *file);
-static int usb_amradio_close(struct file *file);
-static int usb_amradio_suspend(struct usb_interface *intf,
- pm_message_t message);
-static int usb_amradio_resume(struct usb_interface *intf);
-
/* Data for one (physical) device */
struct amradio_device {
/* reference to USB and video device */
struct usb_device *usbdev;
struct usb_interface *intf;
- struct video_device videodev;
+ struct video_device vdev;
struct v4l2_device v4l2_dev;
+ struct v4l2_ctrl_handler hdl;
unsigned char *buffer;
struct mutex lock; /* buffer locking */
int curfreq;
int stereo;
int muted;
- int initialized;
};
static inline struct amradio_device *to_amradio_dev(struct v4l2_device *v4l2_dev)
@@ -147,27 +140,6 @@
return container_of(v4l2_dev, struct amradio_device, v4l2_dev);
}
-/* USB Device ID List */
-static struct usb_device_id usb_amradio_device_table[] = {
- {USB_DEVICE_AND_INTERFACE_INFO(USB_AMRADIO_VENDOR, USB_AMRADIO_PRODUCT,
- USB_CLASS_HID, 0, 0) },
- { } /* Terminating entry */
-};
-
-MODULE_DEVICE_TABLE(usb, usb_amradio_device_table);
-
-/* USB subsystem interface */
-static struct usb_driver usb_amradio_driver = {
- .name = MR800_DRIVER_NAME,
- .probe = usb_amradio_probe,
- .disconnect = usb_amradio_disconnect,
- .suspend = usb_amradio_suspend,
- .resume = usb_amradio_resume,
- .reset_resume = usb_amradio_resume,
- .id_table = usb_amradio_device_table,
- .supports_autosuspend = 1,
-};
-
/* switch on/off the radio. Send 8 bytes to device */
static int amradio_set_mute(struct amradio_device *radio, char argument)
{
@@ -187,21 +159,19 @@
(void *) (radio->buffer), BUFFER_LENGTH, &size, USB_TIMEOUT);
if (retval < 0 || size != BUFFER_LENGTH) {
- amradio_dev_warn(&radio->videodev.dev, "set mute failed\n");
- return retval;
+ amradio_dev_warn(&radio->vdev.dev, "set mute failed\n");
+ return retval < 0 ? retval : -EIO;
}
-
radio->muted = argument;
-
- return retval;
+ return 0;
}
/* set a frequency, freq is defined by v4l's TUNER_LOW, i.e. 1/16th kHz */
static int amradio_setfreq(struct amradio_device *radio, int freq)
{
+ unsigned short freq_send = 0x10 + (freq >> 3) / 25;
int retval;
int size;
- unsigned short freq_send = 0x10 + (freq >> 3) / 25;
radio->buffer[0] = 0x00;
radio->buffer[1] = 0x55;
@@ -216,7 +186,7 @@
(void *) (radio->buffer), BUFFER_LENGTH, &size, USB_TIMEOUT);
if (retval < 0 || size != BUFFER_LENGTH)
- goto out_err;
+ goto out;
/* frequency is calculated from freq_send and placed in first 2 bytes */
radio->buffer[0] = (freq_send >> 8) & 0xff;
@@ -230,16 +200,14 @@
retval = usb_bulk_msg(radio->usbdev, usb_sndintpipe(radio->usbdev, 2),
(void *) (radio->buffer), BUFFER_LENGTH, &size, USB_TIMEOUT);
- if (retval < 0 || size != BUFFER_LENGTH)
- goto out_err;
+ if (retval >= 0 && size == BUFFER_LENGTH) {
+ radio->curfreq = freq;
+ return 0;
+ }
- radio->curfreq = freq;
- goto out;
-
-out_err:
- amradio_dev_warn(&radio->videodev.dev, "set frequency failed\n");
out:
- return retval;
+ amradio_dev_warn(&radio->vdev.dev, "set frequency failed\n");
+ return retval < 0 ? retval : -EIO;
}
static int amradio_set_stereo(struct amradio_device *radio, char argument)
@@ -260,16 +228,12 @@
(void *) (radio->buffer), BUFFER_LENGTH, &size, USB_TIMEOUT);
if (retval < 0 || size != BUFFER_LENGTH) {
- amradio_dev_warn(&radio->videodev.dev, "set stereo failed\n");
- return retval;
+ amradio_dev_warn(&radio->vdev.dev, "set stereo failed\n");
+ return retval < 0 ? retval : -EIO;
}
- if (argument == WANT_STEREO)
- radio->stereo = 1;
- else
- radio->stereo = 0;
-
- return retval;
+ radio->stereo = (argument == WANT_STEREO);
+ return 0;
}
/* Handle unplugging the device.
@@ -282,25 +246,24 @@
struct amradio_device *radio = to_amradio_dev(usb_get_intfdata(intf));
mutex_lock(&radio->lock);
- /* increase the device node's refcount */
- get_device(&radio->videodev.dev);
+ usb_set_intfdata(intf, NULL);
+ video_unregister_device(&radio->vdev);
v4l2_device_disconnect(&radio->v4l2_dev);
- video_unregister_device(&radio->videodev);
mutex_unlock(&radio->lock);
- /* decrease the device node's refcount, allowing it to be released */
- put_device(&radio->videodev.dev);
+ v4l2_device_put(&radio->v4l2_dev);
}
/* vidioc_querycap - query device capabilities */
static int vidioc_querycap(struct file *file, void *priv,
struct v4l2_capability *v)
{
- struct amradio_device *radio = file->private_data;
+ struct amradio_device *radio = video_drvdata(file);
strlcpy(v->driver, "radio-mr800", sizeof(v->driver));
strlcpy(v->card, "AverMedia MR 800 USB FM Radio", sizeof(v->card));
usb_make_path(radio->usbdev, v->bus_info, sizeof(v->bus_info));
- v->capabilities = V4L2_CAP_TUNER;
+ v->device_caps = V4L2_CAP_RADIO | V4L2_CAP_TUNER;
+ v->capabilities = v->device_caps | V4L2_CAP_DEVICE_CAPS;
return 0;
}
@@ -308,44 +271,31 @@
static int vidioc_g_tuner(struct file *file, void *priv,
struct v4l2_tuner *v)
{
- struct amradio_device *radio = file->private_data;
- int retval;
+ struct amradio_device *radio = video_drvdata(file);
if (v->index > 0)
return -EINVAL;
-/* TODO: Add function which look is signal stereo or not
- * amradio_getstat(radio);
- */
-
-/* we call amradio_set_stereo to set radio->stereo
- * Honestly, amradio_getstat should cover this in future and
- * amradio_set_stereo shouldn't be here
- */
- retval = amradio_set_stereo(radio, WANT_STEREO);
-
strcpy(v->name, "FM");
v->type = V4L2_TUNER_RADIO;
v->rangelow = FREQ_MIN * FREQ_MUL;
v->rangehigh = FREQ_MAX * FREQ_MUL;
- v->rxsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO;
- v->capability = V4L2_TUNER_CAP_LOW;
- if (radio->stereo)
- v->audmode = V4L2_TUNER_MODE_STEREO;
- else
- v->audmode = V4L2_TUNER_MODE_MONO;
- v->signal = 0xffff; /* Can't get the signal strength, sad.. */
- v->afc = 0; /* Don't know what is this */
-
- return retval;
+ v->capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO;
+ /* We do not know how to get hold of the stereo indicator, so
+ all we can do is give back both mono and stereo, which
+ effectively means that we don't know. */
+ v->rxsubchans = V4L2_TUNER_SUB_STEREO | V4L2_TUNER_SUB_MONO;
+ v->signal = 0xffff;
+ v->audmode = radio->stereo ?
+ V4L2_TUNER_MODE_STEREO : V4L2_TUNER_MODE_MONO;
+ return 0;
}
/* vidioc_s_tuner - set tuner attributes */
static int vidioc_s_tuner(struct file *file, void *priv,
struct v4l2_tuner *v)
{
- struct amradio_device *radio = file->private_data;
- int retval = -EINVAL;
+ struct amradio_device *radio = video_drvdata(file);
if (v->index > 0)
return -EINVAL;
@@ -353,34 +303,31 @@
/* mono/stereo selector */
switch (v->audmode) {
case V4L2_TUNER_MODE_MONO:
- retval = amradio_set_stereo(radio, WANT_MONO);
- break;
- case V4L2_TUNER_MODE_STEREO:
- retval = amradio_set_stereo(radio, WANT_STEREO);
- break;
+ return amradio_set_stereo(radio, WANT_MONO);
+ default:
+ return amradio_set_stereo(radio, WANT_STEREO);
}
-
- return retval;
}
/* vidioc_s_frequency - set tuner radio frequency */
static int vidioc_s_frequency(struct file *file, void *priv,
struct v4l2_frequency *f)
{
- struct amradio_device *radio = file->private_data;
+ struct amradio_device *radio = video_drvdata(file);
- if (f->tuner != 0 || f->type != V4L2_TUNER_RADIO)
+ if (f->tuner != 0)
return -EINVAL;
- return amradio_setfreq(radio, f->frequency);
+ return amradio_setfreq(radio, clamp_t(unsigned, f->frequency,
+ FREQ_MIN * FREQ_MUL, FREQ_MAX * FREQ_MUL));
}
/* vidioc_g_frequency - get tuner radio frequency */
static int vidioc_g_frequency(struct file *file, void *priv,
struct v4l2_frequency *f)
{
- struct amradio_device *radio = file->private_data;
+ struct amradio_device *radio = video_drvdata(file);
- if (f->tuner != 0)
+ if (f->tuner != 0 || f->type != V4L2_TUNER_RADIO)
return -EINVAL;
f->type = V4L2_TUNER_RADIO;
f->frequency = radio->curfreq;
@@ -388,89 +335,20 @@
return 0;
}
-/* vidioc_queryctrl - enumerate control items */
-static int vidioc_queryctrl(struct file *file, void *priv,
- struct v4l2_queryctrl *qc)
+static int usb_amradio_s_ctrl(struct v4l2_ctrl *ctrl)
{
- switch (qc->id) {
- case V4L2_CID_AUDIO_MUTE:
- return v4l2_ctrl_query_fill(qc, 0, 1, 1, 1);
- }
-
- return -EINVAL;
-}
-
-/* vidioc_g_ctrl - get the value of a control */
-static int vidioc_g_ctrl(struct file *file, void *priv,
- struct v4l2_control *ctrl)
-{
- struct amradio_device *radio = file->private_data;
+ struct amradio_device *radio =
+ container_of(ctrl->handler, struct amradio_device, hdl);
switch (ctrl->id) {
case V4L2_CID_AUDIO_MUTE:
- ctrl->value = radio->muted;
- return 0;
+ return amradio_set_mute(radio,
+ ctrl->val ? AMRADIO_STOP : AMRADIO_START);
}
return -EINVAL;
}
-/* vidioc_s_ctrl - set the value of a control */
-static int vidioc_s_ctrl(struct file *file, void *priv,
- struct v4l2_control *ctrl)
-{
- struct amradio_device *radio = file->private_data;
- int retval = -EINVAL;
-
- switch (ctrl->id) {
- case V4L2_CID_AUDIO_MUTE:
- if (ctrl->value)
- retval = amradio_set_mute(radio, AMRADIO_STOP);
- else
- retval = amradio_set_mute(radio, AMRADIO_START);
-
- break;
- }
-
- return retval;
-}
-
-/* vidioc_g_audio - get audio attributes */
-static int vidioc_g_audio(struct file *file, void *priv,
- struct v4l2_audio *a)
-{
- if (a->index > 1)
- return -EINVAL;
-
- strcpy(a->name, "Radio");
- a->capability = V4L2_AUDCAP_STEREO;
- return 0;
-}
-
-/* vidioc_s_audio - set audio attributes */
-static int vidioc_s_audio(struct file *file, void *priv,
- struct v4l2_audio *a)
-{
- if (a->index != 0)
- return -EINVAL;
- return 0;
-}
-
-/* vidioc_g_input - get input */
-static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
-{
- *i = 0;
- return 0;
-}
-
-/* vidioc_s_input - set input */
-static int vidioc_s_input(struct file *filp, void *priv, unsigned int i)
-{
- if (i != 0)
- return -EINVAL;
- return 0;
-}
-
static int usb_amradio_init(struct amradio_device *radio)
{
int retval;
@@ -483,51 +361,21 @@
if (retval)
goto out_err;
- radio->initialized = 1;
goto out;
out_err:
- amradio_dev_err(&radio->videodev.dev, "initialization failed\n");
+ amradio_dev_err(&radio->vdev.dev, "initialization failed\n");
out:
return retval;
}
-/* open device - amradio_start() and amradio_setfreq() */
-static int usb_amradio_open(struct file *file)
-{
- struct amradio_device *radio = video_drvdata(file);
- int retval;
-
- file->private_data = radio;
- retval = usb_autopm_get_interface(radio->intf);
- if (retval)
- return retval;
-
- if (unlikely(!radio->initialized)) {
- retval = usb_amradio_init(radio);
- if (retval)
- usb_autopm_put_interface(radio->intf);
- }
- return retval;
-}
-
-/*close device */
-static int usb_amradio_close(struct file *file)
-{
- struct amradio_device *radio = file->private_data;
-
- if (video_is_registered(&radio->videodev))
- usb_autopm_put_interface(radio->intf);
- return 0;
-}
-
/* Suspend device - stop device. Need to be checked and fixed */
static int usb_amradio_suspend(struct usb_interface *intf, pm_message_t message)
{
struct amradio_device *radio = to_amradio_dev(usb_get_intfdata(intf));
mutex_lock(&radio->lock);
- if (!radio->muted && radio->initialized) {
+ if (!radio->muted) {
amradio_set_mute(radio, AMRADIO_STOP);
radio->muted = 0;
}
@@ -543,9 +391,6 @@
struct amradio_device *radio = to_amradio_dev(usb_get_intfdata(intf));
mutex_lock(&radio->lock);
- if (unlikely(!radio->initialized))
- goto unlock;
-
if (radio->stereo)
amradio_set_stereo(radio, WANT_STEREO);
else
@@ -556,18 +401,22 @@
if (!radio->muted)
amradio_set_mute(radio, AMRADIO_START);
-unlock:
mutex_unlock(&radio->lock);
dev_info(&intf->dev, "coming out of suspend..\n");
return 0;
}
+static const struct v4l2_ctrl_ops usb_amradio_ctrl_ops = {
+ .s_ctrl = usb_amradio_s_ctrl,
+};
+
/* File system interface */
static const struct v4l2_file_operations usb_amradio_fops = {
.owner = THIS_MODULE,
- .open = usb_amradio_open,
- .release = usb_amradio_close,
+ .open = v4l2_fh_open,
+ .release = v4l2_fh_release,
+ .poll = v4l2_ctrl_poll,
.unlocked_ioctl = video_ioctl2,
};
@@ -577,20 +426,18 @@
.vidioc_s_tuner = vidioc_s_tuner,
.vidioc_g_frequency = vidioc_g_frequency,
.vidioc_s_frequency = vidioc_s_frequency,
- .vidioc_queryctrl = vidioc_queryctrl,
- .vidioc_g_ctrl = vidioc_g_ctrl,
- .vidioc_s_ctrl = vidioc_s_ctrl,
- .vidioc_g_audio = vidioc_g_audio,
- .vidioc_s_audio = vidioc_s_audio,
- .vidioc_g_input = vidioc_g_input,
- .vidioc_s_input = vidioc_s_input,
+ .vidioc_log_status = v4l2_ctrl_log_status,
+ .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
+ .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
};
-static void usb_amradio_video_device_release(struct video_device *videodev)
+static void usb_amradio_release(struct v4l2_device *v4l2_dev)
{
- struct amradio_device *radio = video_get_drvdata(videodev);
+ struct amradio_device *radio = to_amradio_dev(v4l2_dev);
/* free rest memory */
+ v4l2_ctrl_handler_free(&radio->hdl);
+ v4l2_device_unregister(&radio->v4l2_dev);
kfree(radio->buffer);
kfree(radio);
}
@@ -624,23 +471,38 @@
goto err_v4l2;
}
+ v4l2_ctrl_handler_init(&radio->hdl, 1);
+ v4l2_ctrl_new_std(&radio->hdl, &usb_amradio_ctrl_ops,
+ V4L2_CID_AUDIO_MUTE, 0, 1, 1, 1);
+ if (radio->hdl.error) {
+ retval = radio->hdl.error;
+ dev_err(&intf->dev, "couldn't register control\n");
+ goto err_ctrl;
+ }
mutex_init(&radio->lock);
- strlcpy(radio->videodev.name, radio->v4l2_dev.name,
- sizeof(radio->videodev.name));
- radio->videodev.v4l2_dev = &radio->v4l2_dev;
- radio->videodev.fops = &usb_amradio_fops;
- radio->videodev.ioctl_ops = &usb_amradio_ioctl_ops;
- radio->videodev.release = usb_amradio_video_device_release;
- radio->videodev.lock = &radio->lock;
+ radio->v4l2_dev.ctrl_handler = &radio->hdl;
+ radio->v4l2_dev.release = usb_amradio_release;
+ strlcpy(radio->vdev.name, radio->v4l2_dev.name,
+ sizeof(radio->vdev.name));
+ radio->vdev.v4l2_dev = &radio->v4l2_dev;
+ radio->vdev.fops = &usb_amradio_fops;
+ radio->vdev.ioctl_ops = &usb_amradio_ioctl_ops;
+ radio->vdev.release = video_device_release_empty;
+ radio->vdev.lock = &radio->lock;
+ set_bit(V4L2_FL_USE_FH_PRIO, &radio->vdev.flags);
radio->usbdev = interface_to_usbdev(intf);
radio->intf = intf;
+ usb_set_intfdata(intf, &radio->v4l2_dev);
radio->curfreq = 95.16 * FREQ_MUL;
- video_set_drvdata(&radio->videodev, radio);
+ video_set_drvdata(&radio->vdev, radio);
+ retval = usb_amradio_init(radio);
+ if (retval)
+ goto err_vdev;
- retval = video_register_device(&radio->videodev, VFL_TYPE_RADIO,
+ retval = video_register_device(&radio->vdev, VFL_TYPE_RADIO,
radio_nr);
if (retval < 0) {
dev_err(&intf->dev, "could not register video device\n");
@@ -650,6 +512,8 @@
return 0;
err_vdev:
+ v4l2_ctrl_handler_free(&radio->hdl);
+err_ctrl:
v4l2_device_unregister(&radio->v4l2_dev);
err_v4l2:
kfree(radio->buffer);
@@ -659,4 +523,24 @@
return retval;
}
+/* USB Device ID List */
+static struct usb_device_id usb_amradio_device_table[] = {
+ { USB_DEVICE_AND_INTERFACE_INFO(USB_AMRADIO_VENDOR, USB_AMRADIO_PRODUCT,
+ USB_CLASS_HID, 0, 0) },
+ { } /* Terminating entry */
+};
+
+MODULE_DEVICE_TABLE(usb, usb_amradio_device_table);
+
+/* USB subsystem interface */
+static struct usb_driver usb_amradio_driver = {
+ .name = MR800_DRIVER_NAME,
+ .probe = usb_amradio_probe,
+ .disconnect = usb_amradio_disconnect,
+ .suspend = usb_amradio_suspend,
+ .resume = usb_amradio_resume,
+ .reset_resume = usb_amradio_resume,
+ .id_table = usb_amradio_device_table,
+};
+
module_usb_driver(usb_amradio_driver);