[media] siano: Fix initialization for Stellar models

Since kernel 3.8, the initialization for Stellar (sms1000)
devices are broken.
Those devices have a behaviour different than usual sms1100
and sms2270: they start with one USB ID (devices in cold state),
but after firmware load, they get a different USB ID.
This weren't docummented at the driver. So, the patches that added
support for sms2270 broke it.
Properly documment it, and provide a debug log that allows to
follow all phases of the device initialization:
	smsusb_probe: board id=13, interface number 0
	smsusb_probe: interface 0 won't be used. Expecting interface 1 to popup
	smsusb_probe: board id=13, interface number 1
	smsusb_probe: smsusb_probe 1
	smsusb_probe: endpoint 0 81 02 64
	smsusb_probe: endpoint 1 02 02 64
	smsusb_probe: stellar device in cold state was found at usb\4-2.
	smsusb1_load_firmware: sent 38144(38144) bytes, rc 0
	smsusb1_load_firmware: read FW dvbt_bda_stellar_usb.inp, size=38144
	smsusb_probe: stellar device now in warm state
	usbcore: registered new interface driver smsusb
	usb 4-2: USB disconnect, device number 52
	usb 4-2: new full-speed USB device number 53 using uhci_hcd
	usb 4-2: New USB device found, idVendor=187f, idProduct=0100
	usb 4-2: New USB device strings: Mfr=1, Product=2, SerialNumber=0
	usb 4-2: Product: SMS DVBT-BDA Receiver
	usb 4-2: Manufacturer: Siano Mobile Silicon
	smsusb_probe: board id=1, interface number 0
	smsusb_probe: smsusb_probe 0
	smsusb_probe: endpoint 0 81 02 64
	smsusb_probe: endpoint 1 02 02 64
	smsusb_init_device: in_ep = 81, out_ep = 02
	smscore_register_device: allocated 50 buffers
	smscore_register_device: device ffff88012a00bc00 created
	smsusb_init_device: smsusb_start_streaming(...).
	smscore_set_device_mode: set device mode to 4
	smsusb1_detectmode: 4 "SMS DVBT-BDA Receiver"
	smsusb_sendrequest: sending MSG_SMS_INIT_DEVICE_REQ(578) size: 12
	smsusb_onresponse: received MSG_SMS_INIT_DEVICE_RES(579) size: 12
	smscore_set_device_mode: Success setting device mode.
	smscore_init_ir: IR port has not been detected
	smscore_start_device: device ffff88012a00bc00 started, rc 0
	smsusb_init_device: device 0xffff88002cfa6000 created
	smsusb_probe: Device initialized with return code 0
	DVB: registering new adapter (Siano Stellar Digital Receiver)
	usb 4-2: DVB: registering adapter 0 frontend 0 (Siano Mobile Digital MDTV Receiver)...
	smscore_register_client: ffff88012174a000 693 1
	sms_board_dvb3_event: DVB3_EVENT_HOTPLUG
	smsdvb_hotplug: success
	smsdvb_module_init:

Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
Tested-by: André Roth <neolynx@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

1 files changed, 18 insertions, 4 deletions

diff --git a/drivers/media/usb/siano/smsusb.c b/drivers/media/usb/siano/smsusb.c
index 74236b8007c7..33f357510194 100644
--- a/drivers/media/usb/siano/smsusb.c
+++ b/drivers/media/usb/siano/smsusb.c
@@ -491,15 +491,26 @@ static int smsusb_probe(struct usb_interface *intf,
 	}
 
 	if (id->driver_info == SMS1XXX_BOARD_SIANO_STELLAR_ROM) {
+		/* Detected a Siano Stellar uninitialized */
+
 		snprintf(devpath, sizeof(devpath), "usb\\%d-%s",
 			 udev->bus->busnum, udev->devpath);
-		sms_info("stellar device was found.");
-		return smsusb1_load_firmware(
+		sms_info("stellar device in cold state was found at %s.", devpath);
+		rc = smsusb1_load_firmware(
 				udev, smscore_registry_getmode(devpath),
 				id->driver_info);
+
+		/* This device will reset and gain another USB ID */
+		if (!rc)
+			sms_info("stellar device now in warm state");
+		else
+			sms_err("Failed to put stellar in warm state. Error: %d", rc);
+
+		return rc;
+	} else {
+		rc = smsusb_init_device(intf, id->driver_info);
 	}
 
-	rc = smsusb_init_device(intf, id->driver_info);
 	sms_info("Device initialized with return code %d", rc);
 	sms_board_load_modules(id->driver_info);
 	return rc;
@@ -552,10 +563,13 @@ static int smsusb_resume(struct usb_interface *intf)
 }
 
 static const struct usb_device_id smsusb_id_table[] = {
+	/* This device is only present before firmware load */
 	{ USB_DEVICE(0x187f, 0x0010),
-		.driver_info = SMS1XXX_BOARD_SIANO_STELLAR },
+		.driver_info = SMS1XXX_BOARD_SIANO_STELLAR_ROM },
+	/* This device pops up after firmware load */
 	{ USB_DEVICE(0x187f, 0x0100),
 		.driver_info = SMS1XXX_BOARD_SIANO_STELLAR },
+
 	{ USB_DEVICE(0x187f, 0x0200),
 		.driver_info = SMS1XXX_BOARD_SIANO_NOVA_A },
 	{ USB_DEVICE(0x187f, 0x0201),