V4L/DVB (9740): sms1xxx: add USB suspend and hibernation support

This patch provides USB suspend and hibernation support
for Siano's SMS chipset based USB device

Signed-off-by: Uri Shkolnik <uris@siano-ms.com>
Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 45 insertions, 0 deletions

diff --git a/drivers/media/dvb/siano/smsusb.c b/drivers/media/dvb/siano/smsusb.c
index 87a3c24454b9..5d7ca3417719 100644
--- a/drivers/media/dvb/siano/smsusb.c
+++ b/drivers/media/dvb/siano/smsusb.c
@@ -432,11 +432,56 @@ static void smsusb_disconnect(struct usb_interface *intf)
         smsusb_term_device(intf);
 }
 
+static int smsusb_suspend(struct usb_interface *intf, pm_message_t msg)
+{
+        struct smsusb_device_t *dev =
+                (struct smsusb_device_t *)usb_get_intfdata(intf);
+        printk(KERN_INFO "%s  Entering status %d.\n", __func__, msg.event);
+        smsusb_stop_streaming(dev);
+        return 0;
+}
+
+static int smsusb_resume(struct usb_interface *intf)
+{
+        int rc, i;
+        struct smsusb_device_t *dev =
+                (struct smsusb_device_t *)usb_get_intfdata(intf);
+        struct usb_device *udev = interface_to_usbdev(intf);
+
+        printk(KERN_INFO "%s  Entering.\n", __func__);
+        usb_clear_halt(udev, usb_rcvbulkpipe(udev, 0x81));
+        usb_clear_halt(udev, usb_rcvbulkpipe(udev, 0x02));
+
+        for (i = 0; i < intf->cur_altsetting->desc.bNumEndpoints; i++)
+                printk(KERN_INFO "endpoint %d %02x %02x %d\n", i,
+                       intf->cur_altsetting->endpoint[i].desc.bEndpointAddress,
+                       intf->cur_altsetting->endpoint[i].desc.bmAttributes,
+                       intf->cur_altsetting->endpoint[i].desc.wMaxPacketSize);
+
+        if (intf->num_altsetting > 0) {
+                rc = usb_set_interface(udev,
+                                       intf->cur_altsetting->desc.
+                                       bInterfaceNumber, 0);
+                if (rc < 0) {
+                        printk(KERN_INFO
+                               "%s usb_set_interface failed, rc %d\n",
+                               __func__, rc);
+                        return rc;
+                }
+        }
+
+        smsusb_start_streaming(dev);
+        return 0;
+}
+
 static struct usb_driver smsusb_driver = {
         .name                   = "sms1xxx",
         .probe                  = smsusb_probe,
         .disconnect             = smsusb_disconnect,
         .id_table               = smsusb_id_table,
+
+        .suspend                = smsusb_suspend,
+        .resume                 = smsusb_resume,
 };
 
 int smsusb_register(void)