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path: root/drivers/media/radio/dsbr100.c
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Diffstat (limited to 'drivers/media/radio/dsbr100.c')
-rw-r--r--drivers/media/radio/dsbr100.c109
1 files changed, 38 insertions, 71 deletions
diff --git a/drivers/media/radio/dsbr100.c b/drivers/media/radio/dsbr100.c
index 61357620229..ed9cd7ad060 100644
--- a/drivers/media/radio/dsbr100.c
+++ b/drivers/media/radio/dsbr100.c
@@ -33,6 +33,10 @@
History:
+ Version 0.46:
+ Removed usb_dsbr100_open/close calls and radio->users counter. Also,
+ radio->muted changed to radio->status and suspend/resume calls updated.
+
Version 0.45:
Converted to v4l2_device.
@@ -100,8 +104,8 @@
*/
#include <linux/version.h> /* for KERNEL_VERSION MACRO */
-#define DRIVER_VERSION "v0.45"
-#define RADIO_VERSION KERNEL_VERSION(0, 4, 5)
+#define DRIVER_VERSION "v0.46"
+#define RADIO_VERSION KERNEL_VERSION(0, 4, 6)
#define DRIVER_AUTHOR "Markus Demleitner <msdemlei@tucana.harvard.edu>"
#define DRIVER_DESC "D-Link DSB-R100 USB FM radio driver"
@@ -121,13 +125,15 @@ devices, that would be 76 and 91. */
#define FREQ_MAX 108.0
#define FREQ_MUL 16000
+/* defines for radio->status */
+#define STARTED 0
+#define STOPPED 1
+
#define videodev_to_radio(d) container_of(d, struct dsbr100_device, videodev)
static int usb_dsbr100_probe(struct usb_interface *intf,
const struct usb_device_id *id);
static void usb_dsbr100_disconnect(struct usb_interface *intf);
-static int usb_dsbr100_open(struct file *file);
-static int usb_dsbr100_close(struct file *file);
static int usb_dsbr100_suspend(struct usb_interface *intf,
pm_message_t message);
static int usb_dsbr100_resume(struct usb_interface *intf);
@@ -145,9 +151,8 @@ struct dsbr100_device {
struct mutex lock; /* buffer locking */
int curfreq;
int stereo;
- int users;
int removed;
- int muted;
+ int status;
};
static struct usb_device_id usb_dsbr100_device_table [] = {
@@ -201,7 +206,7 @@ static int dsbr100_start(struct dsbr100_device *radio)
goto usb_control_msg_failed;
}
- radio->muted = 0;
+ radio->status = STARTED;
mutex_unlock(&radio->lock);
return (radio->transfer_buffer)[0];
@@ -244,7 +249,7 @@ static int dsbr100_stop(struct dsbr100_device *radio)
goto usb_control_msg_failed;
}
- radio->muted = 1;
+ radio->status = STOPPED;
mutex_unlock(&radio->lock);
return (radio->transfer_buffer)[0];
@@ -258,12 +263,12 @@ usb_control_msg_failed:
}
/* set a frequency, freq is defined by v4l's TUNER_LOW, i.e. 1/16th kHz */
-static int dsbr100_setfreq(struct dsbr100_device *radio, int freq)
+static int dsbr100_setfreq(struct dsbr100_device *radio)
{
int retval;
int request;
+ int freq = (radio->curfreq / 16 * 80) / 1000 + 856;
- freq = (freq / 16 * 80) / 1000 + 856;
mutex_lock(&radio->lock);
retval = usb_control_msg(radio->usbdev,
@@ -431,7 +436,7 @@ static int vidioc_s_frequency(struct file *file, void *priv,
radio->curfreq = f->frequency;
mutex_unlock(&radio->lock);
- retval = dsbr100_setfreq(radio, radio->curfreq);
+ retval = dsbr100_setfreq(radio);
if (retval < 0)
dev_warn(&radio->usbdev->dev, "Set frequency failed\n");
return 0;
@@ -473,7 +478,7 @@ static int vidioc_g_ctrl(struct file *file, void *priv,
switch (ctrl->id) {
case V4L2_CID_AUDIO_MUTE:
- ctrl->value = radio->muted;
+ ctrl->value = radio->status;
return 0;
}
return -EINVAL;
@@ -543,65 +548,27 @@ static int vidioc_s_audio(struct file *file, void *priv,
return 0;
}
-static int usb_dsbr100_open(struct file *file)
-{
- struct dsbr100_device *radio = video_drvdata(file);
- int retval;
-
- lock_kernel();
- radio->users = 1;
- radio->muted = 1;
-
- retval = dsbr100_start(radio);
- if (retval < 0) {
- dev_warn(&radio->usbdev->dev,
- "Radio did not start up properly\n");
- radio->users = 0;
- unlock_kernel();
- return -EIO;
- }
-
- retval = dsbr100_setfreq(radio, radio->curfreq);
- if (retval < 0)
- dev_warn(&radio->usbdev->dev,
- "set frequency failed\n");
-
- unlock_kernel();
- return 0;
-}
-
-static int usb_dsbr100_close(struct file *file)
-{
- struct dsbr100_device *radio = video_drvdata(file);
- int retval;
-
- if (!radio)
- return -ENODEV;
-
- mutex_lock(&radio->lock);
- radio->users = 0;
- mutex_unlock(&radio->lock);
-
- if (!radio->removed) {
- retval = dsbr100_stop(radio);
- if (retval < 0) {
- dev_warn(&radio->usbdev->dev,
- "dsbr100_stop failed\n");
- }
-
- }
- return 0;
-}
-
/* Suspend device - stop device. */
static int usb_dsbr100_suspend(struct usb_interface *intf, pm_message_t message)
{
struct dsbr100_device *radio = usb_get_intfdata(intf);
int retval;
- retval = dsbr100_stop(radio);
- if (retval < 0)
- dev_warn(&intf->dev, "dsbr100_stop failed\n");
+ if (radio->status == STARTED) {
+ retval = dsbr100_stop(radio);
+ if (retval < 0)
+ dev_warn(&intf->dev, "dsbr100_stop failed\n");
+
+ /* After dsbr100_stop() status set to STOPPED.
+ * If we want driver to start radio on resume
+ * we set status equal to STARTED.
+ * On resume we will check status and run radio if needed.
+ */
+
+ mutex_lock(&radio->lock);
+ radio->status = STARTED;
+ mutex_unlock(&radio->lock);
+ }
dev_info(&intf->dev, "going into suspend..\n");
@@ -614,9 +581,11 @@ static int usb_dsbr100_resume(struct usb_interface *intf)
struct dsbr100_device *radio = usb_get_intfdata(intf);
int retval;
- retval = dsbr100_start(radio);
- if (retval < 0)
- dev_warn(&intf->dev, "dsbr100_start failed\n");
+ if (radio->status == STARTED) {
+ retval = dsbr100_start(radio);
+ if (retval < 0)
+ dev_warn(&intf->dev, "dsbr100_start failed\n");
+ }
dev_info(&intf->dev, "coming out of suspend..\n");
@@ -636,8 +605,6 @@ static void usb_dsbr100_video_device_release(struct video_device *videodev)
/* File system interface */
static const struct v4l2_file_operations usb_dsbr100_fops = {
.owner = THIS_MODULE,
- .open = usb_dsbr100_open,
- .release = usb_dsbr100_close,
.ioctl = video_ioctl2,
};
@@ -695,9 +662,9 @@ static int usb_dsbr100_probe(struct usb_interface *intf,
mutex_init(&radio->lock);
radio->removed = 0;
- radio->users = 0;
radio->usbdev = interface_to_usbdev(intf);
radio->curfreq = FREQ_MIN * FREQ_MUL;
+ radio->status = STOPPED;
video_set_drvdata(&radio->videodev, radio);