Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media

Pull media updates from Mauro Carvalho Chehab:
 "The first part of the media updates for Kernel 3.7.

  This series contain:

   - A major tree renaming patch series: now, drivers are organized
     internally by their used bus, instead of by V4L2 and/or DVB API,
     providing a cleaner driver location for hybrid drivers that
     implement both APIs, and allowing to cleanup the Kconfig items and
     make them more intuitive for the end user;

   - Media Kernel developers are typically very lazy with their duties
     of keeping the MAINTAINERS entries for their drivers updated.  As
     now the tree is more organized, we're doing an effort to add/update
     those entries for the drivers that aren't currently orphan;

   - Several DVB USB drivers got moved to a new DVB USB v2 core; the new
     core fixes several bugs (as the existing one that got bitroted).
     Now, suspend/resume finally started to work fine (at least with
     some devices - we should expect more work with regards to it);

   - added multistream support for DVB-T2, and unified the API for
     DVB-S2 and ISDB-S.  Backward binary support is preserved;

   - as usual, a few new drivers, some V4L2 core improvements and lots
     of drivers improvements and fixes.

  There are some points to notice on this series:

   1) you should expect a trivial merge conflict on your tree, with the
      removal of Documentation/feature-removal-schedule.txt: this series
      would be adding two additional entries there.  I opted to not
      rebase it due to this recent change;

   2) With regards to the PCTV 520e udev-related breakage, I opted to
      fix it in a way that the patches can be backported to 3.5 even
      without your firmware fix patch.  This way, Greg doesn't need to
      rush backporting your patch (as there are still the firmware cache
      and firmware path customization issues to be addressed there).

      I'll send later a patch (likely after the end of the merge window)
      reverting the rest of the DRX-K async firmware request, fully
      restoring its original behaviour to allow media drivers to
      initialize everything serialized as before for 3.7 and upper.

   3) I'm planning to work on this weekend to test the DMABUF patches
      for V4L2.  The patches are on my queue for several Kernel cycles,
      but, up to now, there is/was no way to test the series locally.

      I have some concerns about this particular changeset with regards
      to security issues, and with regards to the replacement of the old
      VIDIOC_OVERLAY ioctl's that is broken on modern systems, due to
      GPU drivers change.  The Overlay API allows direct PCI2PCI
      transfers from a media capture card into the GPU framebuffer, but
      its API is crappy.  Also, the only existing X11 driver that
      implements it requires a XV extension that is not available
      anymore on modern drivers.  The DMABUF can do the same thing, but
      with it is promising to be a properly-designed API.  If I can
      successfully test this series and be happy with it, I should be
      asking you to pull them next week."

* 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: (717 commits)
  em28xx: regression fix: use DRX-K sync firmware requests on em28xx
  drxk: allow loading firmware synchrousnously
  em28xx: Make all em28xx extensions to be initialized asynchronously
  [media] tda18271: properly report read errors in tda18271_get_id
  [media] tda18271: delay IR & RF calibration until init() if delay_cal is set
  [media] MAINTAINERS: add Michael Krufky as tda827x maintainer
  [media] MAINTAINERS: add Michael Krufky as tda8290 maintainer
  [media] MAINTAINERS: add Michael Krufky as cxusb maintainer
  [media] MAINTAINERS: add Michael Krufky as lg2160 maintainer
  [media] MAINTAINERS: add Michael Krufky as lgdt3305 maintainer
  [media] MAINTAINERS: add Michael Krufky as mxl111sf maintainer
  [media] MAINTAINERS: add Michael Krufky as mxl5007t maintainer
  [media] MAINTAINERS: add Michael Krufky as tda18271 maintainer
  [media] s5p-tv: Report only multi-plane capabilities in vidioc_querycap
  [media] s5p-mfc: Fix misplaced return statement in s5p_mfc_suspend()
  [media] exynos-gsc: Add missing static storage class specifiers
  [media] exynos-gsc: Remove <linux/version.h> header file inclusion
  [media] s5p-fimc: Fix incorrect condition in fimc_lite_reqbufs()
  [media] s5p-tv: Fix potential NULL pointer dereference error
  [media] s5k6aa: Fix possible NULL pointer dereference
  ...

1 files changed, 113 insertions, 134 deletions

diff --git a/drivers/media/rc/iguanair.c b/drivers/media/rc/iguanair.c
index 5e2eaf8ba73e..1e4c68a5cecf 100644
--- a/drivers/media/rc/iguanair.c
+++ b/drivers/media/rc/iguanair.c
@@ -35,9 +35,9 @@ struct iguanair {
 	struct device *dev;
 	struct usb_device *udev;
 
-	int pipe_in, pipe_out;
+	int pipe_out;
+	uint16_t version;
 	uint8_t bufsize;
-	uint8_t version[2];
 
 	struct mutex lock;
 
@@ -75,6 +75,7 @@ struct iguanair {
 
 #define MAX_PACKET_SIZE		8u
 #define TIMEOUT			1000
+#define RX_RESOLUTION		21333
 
 struct packet {
 	uint16_t start;
@@ -82,11 +83,6 @@ struct packet {
 	uint8_t cmd;
 };
 
-struct response_packet {
-	struct packet header;
-	uint8_t data[4];
-};
-
 struct send_packet {
 	struct packet header;
 	uint8_t length;
@@ -100,6 +96,25 @@ static void process_ir_data(struct iguanair *ir, unsigned len)
 {
 	if (len >= 4 && ir->buf_in[0] == 0 && ir->buf_in[1] == 0) {
 		switch (ir->buf_in[3]) {
+		case CMD_GET_VERSION:
+			if (len == 6) {
+				ir->version = (ir->buf_in[5] << 8) |
+							ir->buf_in[4];
+				complete(&ir->completion);
+			}
+			break;
+		case CMD_GET_BUFSIZE:
+			if (len >= 5) {
+				ir->bufsize = ir->buf_in[4];
+				complete(&ir->completion);
+			}
+			break;
+		case CMD_GET_FEATURES:
+			if (len > 5) {
+				ir->cycle_overhead = ir->buf_in[5];
+				complete(&ir->completion);
+			}
+			break;
 		case CMD_TX_OVERFLOW:
 			ir->tx_overflow = true;
 		case CMD_RECEIVER_OFF:
@@ -109,6 +124,7 @@ static void process_ir_data(struct iguanair *ir, unsigned len)
 			break;
 		case CMD_RX_OVERFLOW:
 			dev_warn(ir->dev, "receive overflow\n");
+			ir_raw_event_reset(ir->rc);
 			break;
 		default:
 			dev_warn(ir->dev, "control code %02x received\n",
@@ -118,6 +134,7 @@ static void process_ir_data(struct iguanair *ir, unsigned len)
 	} else if (len >= 7) {
 		DEFINE_IR_RAW_EVENT(rawir);
 		unsigned i;
+		bool event = false;
 
 		init_ir_raw_event(&rawir);
 
@@ -128,19 +145,22 @@ static void process_ir_data(struct iguanair *ir, unsigned len)
 			} else {
 				rawir.pulse = (ir->buf_in[i] & 0x80) == 0;
 				rawir.duration = ((ir->buf_in[i] & 0x7f) + 1) *
-									 21330;
+								 RX_RESOLUTION;
 			}
 
-			ir_raw_event_store_with_filter(ir->rc, &rawir);
+			if (ir_raw_event_store_with_filter(ir->rc, &rawir))
+				event = true;
 		}
 
-		ir_raw_event_handle(ir->rc);
+		if (event)
+			ir_raw_event_handle(ir->rc);
 	}
 }
 
 static void iguanair_rx(struct urb *urb)
 {
 	struct iguanair *ir;
+	int rc;
 
 	if (!urb)
 		return;
@@ -166,34 +186,27 @@ static void iguanair_rx(struct urb *urb)
 		break;
 	}
 
-	usb_submit_urb(urb, GFP_ATOMIC);
+	rc = usb_submit_urb(urb, GFP_ATOMIC);
+	if (rc && rc != -ENODEV)
+		dev_warn(ir->dev, "failed to resubmit urb: %d\n", rc);
 }
 
-static int iguanair_send(struct iguanair *ir, void *data, unsigned size,
-			struct response_packet *response, unsigned *res_len)
+static int iguanair_send(struct iguanair *ir, void *data, unsigned size)
 {
-	unsigned offset, len;
 	int rc, transferred;
 
-	for (offset = 0; offset < size; offset += MAX_PACKET_SIZE) {
-		len = min(size - offset, MAX_PACKET_SIZE);
-
-		if (ir->tx_overflow)
-			return -EOVERFLOW;
+	INIT_COMPLETION(ir->completion);
 
-		rc = usb_interrupt_msg(ir->udev, ir->pipe_out, data + offset,
-						len, &transferred, TIMEOUT);
-		if (rc)
-			return rc;
+	rc = usb_interrupt_msg(ir->udev, ir->pipe_out, data, size,
+							&transferred, TIMEOUT);
+	if (rc)
+		return rc;
 
-		if (transferred != len)
-			return -EIO;
-	}
+	if (transferred != size)
+		return -EIO;
 
-	if (response) {
-		rc = usb_interrupt_msg(ir->udev, ir->pipe_in, response,
-					sizeof(*response), res_len, TIMEOUT);
-	}
+	if (wait_for_completion_timeout(&ir->completion, TIMEOUT) == 0)
+		return -ETIMEDOUT;
 
 	return rc;
 }
@@ -201,66 +214,43 @@ static int iguanair_send(struct iguanair *ir, void *data, unsigned size,
 static int iguanair_get_features(struct iguanair *ir)
 {
 	struct packet packet;
-	struct response_packet response;
-	int rc, len;
+	int rc;
 
 	packet.start = 0;
 	packet.direction = DIR_OUT;
 	packet.cmd = CMD_GET_VERSION;
 
-	rc = iguanair_send(ir, &packet, sizeof(packet), &response, &len);
+	rc = iguanair_send(ir, &packet, sizeof(packet));
 	if (rc) {
 		dev_info(ir->dev, "failed to get version\n");
 		goto out;
 	}
 
-	if (len != 6) {
-		dev_info(ir->dev, "failed to get version\n");
-		rc = -EIO;
+	if (ir->version < 0x205) {
+		dev_err(ir->dev, "firmware 0x%04x is too old\n", ir->version);
+		rc = -ENODEV;
 		goto out;
 	}
 
-	ir->version[0] = response.data[0];
-	ir->version[1] = response.data[1];
 	ir->bufsize = 150;
 	ir->cycle_overhead = 65;
 
 	packet.cmd = CMD_GET_BUFSIZE;
 
-	rc = iguanair_send(ir, &packet, sizeof(packet), &response, &len);
+	rc = iguanair_send(ir, &packet, sizeof(packet));
 	if (rc) {
 		dev_info(ir->dev, "failed to get buffer size\n");
 		goto out;
 	}
 
-	if (len != 5) {
-		dev_info(ir->dev, "failed to get buffer size\n");
-		rc = -EIO;
-		goto out;
-	}
-
-	ir->bufsize = response.data[0];
-
-	if (ir->version[0] == 0 || ir->version[1] == 0)
-		goto out;
-
 	packet.cmd = CMD_GET_FEATURES;
 
-	rc = iguanair_send(ir, &packet, sizeof(packet), &response, &len);
+	rc = iguanair_send(ir, &packet, sizeof(packet));
 	if (rc) {
 		dev_info(ir->dev, "failed to get features\n");
 		goto out;
 	}
 
-	if (len < 5) {
-		dev_info(ir->dev, "failed to get features\n");
-		rc = -EIO;
-		goto out;
-	}
-
-	if (len > 5 && ir->version[0] >= 4)
-		ir->cycle_overhead = response.data[1];
-
 out:
 	return rc;
 }
@@ -269,17 +259,11 @@ static int iguanair_receiver(struct iguanair *ir, bool enable)
 {
 	struct packet packet = { 0, DIR_OUT, enable ?
 				CMD_RECEIVER_ON : CMD_RECEIVER_OFF };
-	int rc;
-
-	INIT_COMPLETION(ir->completion);
 
-	rc = iguanair_send(ir, &packet, sizeof(packet), NULL, NULL);
-	if (rc)
-		return rc;
-
-	wait_for_completion_timeout(&ir->completion, TIMEOUT);
+	if (enable)
+		ir_raw_event_reset(ir->rc);
 
-	return 0;
+	return iguanair_send(ir, &packet, sizeof(packet));
 }
 
 /*
@@ -350,26 +334,38 @@ static int iguanair_set_tx_mask(struct rc_dev *dev, uint32_t mask)
 static int iguanair_tx(struct rc_dev *dev, unsigned *txbuf, unsigned count)
 {
 	struct iguanair *ir = dev->priv;
-	uint8_t space, *payload;
-	unsigned i, size, rc;
+	uint8_t space;
+	unsigned i, size, periods, bytes;
+	int rc;
 	struct send_packet *packet;
 
 	mutex_lock(&ir->lock);
 
-	/* convert from us to carrier periods */
-	for (i = size = 0; i < count; i++) {
-		txbuf[i] = DIV_ROUND_CLOSEST(txbuf[i] * ir->carrier, 1000000);
-		size += (txbuf[i] + 126) / 127;
-	}
-
-	packet = kmalloc(sizeof(*packet) + size, GFP_KERNEL);
+	packet = kmalloc(sizeof(*packet) + ir->bufsize, GFP_KERNEL);
 	if (!packet) {
 		rc = -ENOMEM;
 		goto out;
 	}
 
-	if (size > ir->bufsize) {
-		rc = -E2BIG;
+	/* convert from us to carrier periods */
+	for (i = space = size = 0; i < count; i++) {
+		periods = DIV_ROUND_CLOSEST(txbuf[i] * ir->carrier, 1000000);
+		bytes = DIV_ROUND_UP(periods, 127);
+		if (size + bytes > ir->bufsize) {
+			count = i;
+			break;
+		}
+		while (periods > 127) {
+			packet->payload[size++] = 127 | space;
+			periods -= 127;
+		}
+
+		packet->payload[size++] = periods | space;
+		space ^= 0x80;
+	}
+
+	if (count == 0) {
+		rc = -EINVAL;
 		goto out;
 	}
 
@@ -381,21 +377,6 @@ static int iguanair_tx(struct rc_dev *dev, unsigned *txbuf, unsigned count)
 	packet->busy7 = ir->busy7;
 	packet->busy4 = ir->busy4;
 
-	space = 0;
-	payload = packet->payload;
-
-	for (i = 0; i < count; i++) {
-		unsigned periods = txbuf[i];
-
-		while (periods > 127) {
-			*payload++ = 127 | space;
-			periods -= 127;
-		}
-
-		*payload++ = periods | space;
-		space ^= 0x80;
-	}
-
 	if (ir->receiver_on) {
 		rc = iguanair_receiver(ir, false);
 		if (rc) {
@@ -406,17 +387,10 @@ static int iguanair_tx(struct rc_dev *dev, unsigned *txbuf, unsigned count)
 
 	ir->tx_overflow = false;
 
-	INIT_COMPLETION(ir->completion);
+	rc = iguanair_send(ir, packet, size + 8);
 
-	rc = iguanair_send(ir, packet, size + 8, NULL, NULL);
-
-	if (rc == 0) {
-		wait_for_completion_timeout(&ir->completion, TIMEOUT);
-		if (ir->tx_overflow)
-			rc = -EOVERFLOW;
-	}
-
-	ir->tx_overflow = false;
+	if (rc == 0 && ir->tx_overflow)
+		rc = -EOVERFLOW;
 
 	if (ir->receiver_on) {
 		if (iguanair_receiver(ir, true))
@@ -424,10 +398,10 @@ static int iguanair_tx(struct rc_dev *dev, unsigned *txbuf, unsigned count)
 	}
 
 out:
-	mutex_unlock(&ir->lock);
 	kfree(packet);
+	mutex_unlock(&ir->lock);
 
-	return rc;
+	return rc ? rc : count;
 }
 
 static int iguanair_open(struct rc_dev *rdev)
@@ -437,8 +411,6 @@ static int iguanair_open(struct rc_dev *rdev)
 
 	mutex_lock(&ir->lock);
 
-	usb_submit_urb(ir->urb_in, GFP_KERNEL);
-
 	BUG_ON(ir->receiver_on);
 
 	rc = iguanair_receiver(ir, true);
@@ -459,11 +431,9 @@ static void iguanair_close(struct rc_dev *rdev)
 
 	rc = iguanair_receiver(ir, false);
 	ir->receiver_on = false;
-	if (rc)
+	if (rc && rc != -ENODEV)
 		dev_warn(ir->dev, "failed to disable receiver: %d\n", rc);
 
-	usb_kill_urb(ir->urb_in);
-
 	mutex_unlock(&ir->lock);
 }
 
@@ -473,22 +443,22 @@ static int __devinit iguanair_probe(struct usb_interface *intf,
 	struct usb_device *udev = interface_to_usbdev(intf);
 	struct iguanair *ir;
 	struct rc_dev *rc;
-	int ret;
+	int ret, pipein;
 	struct usb_host_interface *idesc;
 
 	ir = kzalloc(sizeof(*ir), GFP_KERNEL);
 	rc = rc_allocate_device();
 	if (!ir || !rc) {
-		ret = ENOMEM;
+		ret = -ENOMEM;
 		goto out;
 	}
 
-	ir->buf_in = usb_alloc_coherent(udev, MAX_PACKET_SIZE, GFP_ATOMIC,
+	ir->buf_in = usb_alloc_coherent(udev, MAX_PACKET_SIZE, GFP_KERNEL,
 								&ir->dma_in);
 	ir->urb_in = usb_alloc_urb(0, GFP_KERNEL);
 
 	if (!ir->buf_in || !ir->urb_in) {
-		ret = ENOMEM;
+		ret = -ENOMEM;
 		goto out;
 	}
 
@@ -502,28 +472,29 @@ static int __devinit iguanair_probe(struct usb_interface *intf,
 	ir->rc = rc;
 	ir->dev = &intf->dev;
 	ir->udev = udev;
-	ir->pipe_in = usb_rcvintpipe(udev,
-				idesc->endpoint[0].desc.bEndpointAddress);
 	ir->pipe_out = usb_sndintpipe(udev,
 				idesc->endpoint[1].desc.bEndpointAddress);
 	mutex_init(&ir->lock);
 	init_completion(&ir->completion);
 
-	ret = iguanair_get_features(ir);
+	pipein = usb_rcvintpipe(udev, idesc->endpoint[0].desc.bEndpointAddress);
+	usb_fill_int_urb(ir->urb_in, udev, pipein, ir->buf_in, MAX_PACKET_SIZE,
+							 iguanair_rx, ir, 1);
+	ir->urb_in->transfer_dma = ir->dma_in;
+	ir->urb_in->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
+
+	ret = usb_submit_urb(ir->urb_in, GFP_KERNEL);
 	if (ret) {
-		dev_warn(&intf->dev, "failed to get device features");
+		dev_warn(&intf->dev, "failed to submit urb: %d\n", ret);
 		goto out;
 	}
 
-	usb_fill_int_urb(ir->urb_in, ir->udev, ir->pipe_in, ir->buf_in,
-		MAX_PACKET_SIZE, iguanair_rx, ir,
-		idesc->endpoint[0].desc.bInterval);
-	ir->urb_in->transfer_dma = ir->dma_in;
-	ir->urb_in->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
+	ret = iguanair_get_features(ir);
+	if (ret)
+		goto out2;
 
 	snprintf(ir->name, sizeof(ir->name),
-		"IguanaWorks USB IR Transceiver version %d.%d",
-		ir->version[0], ir->version[1]);
+		"IguanaWorks USB IR Transceiver version 0x%04x", ir->version);
 
 	usb_make_path(ir->udev, ir->phys, sizeof(ir->phys));
 
@@ -540,21 +511,23 @@ static int __devinit iguanair_probe(struct usb_interface *intf,
 	rc->s_tx_carrier = iguanair_set_tx_carrier;
 	rc->tx_ir = iguanair_tx;
 	rc->driver_name = DRIVER_NAME;
-	rc->map_name = RC_MAP_EMPTY;
+	rc->map_name = RC_MAP_RC6_MCE;
+	rc->timeout = MS_TO_NS(100);
+	rc->rx_resolution = RX_RESOLUTION;
 
 	iguanair_set_tx_carrier(rc, 38000);
 
 	ret = rc_register_device(rc);
 	if (ret < 0) {
 		dev_err(&intf->dev, "failed to register rc device %d", ret);
-		goto out;
+		goto out2;
 	}
 
 	usb_set_intfdata(intf, ir);
 
-	dev_info(&intf->dev, "Registered %s", ir->name);
-
 	return 0;
+out2:
+	usb_kill_urb(ir->urb_in);
 out:
 	if (ir) {
 		usb_free_urb(ir->urb_in);
@@ -570,12 +543,11 @@ static void __devexit iguanair_disconnect(struct usb_interface *intf)
 {
 	struct iguanair *ir = usb_get_intfdata(intf);
 
+	rc_unregister_device(ir->rc);
 	usb_set_intfdata(intf, NULL);
-
 	usb_kill_urb(ir->urb_in);
 	usb_free_urb(ir->urb_in);
 	usb_free_coherent(ir->udev, MAX_PACKET_SIZE, ir->buf_in, ir->dma_in);
-	rc_unregister_device(ir->rc);
 	kfree(ir);
 }
 
@@ -592,6 +564,8 @@ static int iguanair_suspend(struct usb_interface *intf, pm_message_t message)
 			dev_warn(ir->dev, "failed to disable receiver for suspend\n");
 	}
 
+	usb_kill_urb(ir->urb_in);
+
 	mutex_unlock(&ir->lock);
 
 	return rc;
@@ -604,6 +578,10 @@ static int iguanair_resume(struct usb_interface *intf)
 
 	mutex_lock(&ir->lock);
 
+	rc = usb_submit_urb(ir->urb_in, GFP_KERNEL);
+	if (rc)
+		dev_warn(&intf->dev, "failed to submit urb: %d\n", rc);
+
 	if (ir->receiver_on) {
 		rc = iguanair_receiver(ir, true);
 		if (rc)
@@ -627,7 +605,8 @@ static struct usb_driver iguanair_driver = {
 	.suspend = iguanair_suspend,
 	.resume = iguanair_resume,
 	.reset_resume = iguanair_resume,
-	.id_table = iguanair_table
+	.id_table = iguanair_table,
+	.soft_unbind = 1	/* we want to disable receiver on unbind */
 };
 
 module_usb_driver(iguanair_driver);