V4L/DVB (11957): dsbr100: change radio->muted to radio->status, update suspend/resume

Patch renames radio->muted to radio->status, add defines for that
variable, and fixes suspend/resume procedure. Radio->status set to
STOPPED in usb_dsbr100_probe because of removing open call.
Also, patch increases driver version.

Signed-off-by: Alexey Klimov <klimov.linux@gmail.com>
Signed-off-by: Douglas Schilling Landgraf <dougsland@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

diff --git a/drivers/media/radio/dsbr100.c b/drivers/media/radio/dsbr100.c
index 17e8f2c..ed9cd7a 100644 (file)
--- 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"
@@ -121,6 +125,10 @@ 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,
@@ -144,7 +152,7 @@ struct dsbr100_device {
        int curfreq;
        int stereo;
        int removed;
-       int muted;
+       int status;
 };
 
 static struct usb_device_id usb_dsbr100_device_table [] = {
@@ -198,7 +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];
 
@@ -241,7 +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];
 
@@ -470,7 +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;
@@ -546,9 +554,21 @@ 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");
 
@@ -561,9 +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");
 
@@ -642,6 +664,7 @@ static int usb_dsbr100_probe(struct usb_interface *intf,
        radio->removed = 0;
        radio->usbdev = interface_to_usbdev(intf);
        radio->curfreq = FREQ_MIN * FREQ_MUL;
+       radio->status = STOPPED;
 
        video_set_drvdata(&radio->videodev, radio);