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, 365 insertions, 0 deletions

diff --git a/drivers/media/pci/cx23885/cx23885-input.c b/drivers/media/pci/cx23885/cx23885-input.c
new file mode 100644
index 000000000000..2c925f77cf2a
--- /dev/null
+++ b/drivers/media/pci/cx23885/cx23885-input.c
@@ -0,0 +1,365 @@
+/*
+ *  Driver for the Conexant CX23885/7/8 PCIe bridge
+ *
+ *  Infrared remote control input device
+ *
+ *  Most of this file is
+ *
+ *  Copyright (C) 2009  Andy Walls <awalls@md.metrocast.net>
+ *
+ *  However, the cx23885_input_{init,fini} functions contained herein are
+ *  derived from Linux kernel files linux/media/video/.../...-input.c marked as:
+ *
+ *  Copyright (C) 2008 <srinivasa.deevi at conexant dot com>
+ *  Copyright (C) 2005 Ludovico Cavedon <cavedon@sssup.it>
+ *		       Markus Rechberger <mrechberger@gmail.com>
+ *		       Mauro Carvalho Chehab <mchehab@infradead.org>
+ *		       Sascha Sommer <saschasommer@freenet.de>
+ *  Copyright (C) 2004, 2005 Chris Pascoe
+ *  Copyright (C) 2003, 2004 Gerd Knorr
+ *  Copyright (C) 2003 Pavel Machek
+ *
+ *  This program is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU General Public License
+ *  as published by the Free Software Foundation; either version 2
+ *  of the License, or (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ *  02110-1301, USA.
+ */
+
+#include <linux/slab.h>
+#include <media/rc-core.h>
+#include <media/v4l2-subdev.h>
+
+#include "cx23885.h"
+
+#define MODULE_NAME "cx23885"
+
+static void cx23885_input_process_measurements(struct cx23885_dev *dev,
+					       bool overrun)
+{
+	struct cx23885_kernel_ir *kernel_ir = dev->kernel_ir;
+
+	ssize_t num;
+	int count, i;
+	bool handle = false;
+	struct ir_raw_event ir_core_event[64];
+
+	do {
+		num = 0;
+		v4l2_subdev_call(dev->sd_ir, ir, rx_read, (u8 *) ir_core_event,
+				 sizeof(ir_core_event), &num);
+
+		count = num / sizeof(struct ir_raw_event);
+
+		for (i = 0; i < count; i++) {
+			ir_raw_event_store(kernel_ir->rc,
+					   &ir_core_event[i]);
+			handle = true;
+		}
+	} while (num != 0);
+
+	if (overrun)
+		ir_raw_event_reset(kernel_ir->rc);
+	else if (handle)
+		ir_raw_event_handle(kernel_ir->rc);
+}
+
+void cx23885_input_rx_work_handler(struct cx23885_dev *dev, u32 events)
+{
+	struct v4l2_subdev_ir_parameters params;
+	int overrun, data_available;
+
+	if (dev->sd_ir == NULL || events == 0)
+		return;
+
+	switch (dev->board) {
+	case CX23885_BOARD_HAUPPAUGE_HVR1270:
+	case CX23885_BOARD_HAUPPAUGE_HVR1850:
+	case CX23885_BOARD_HAUPPAUGE_HVR1290:
+	case CX23885_BOARD_TERRATEC_CINERGY_T_PCIE_DUAL:
+	case CX23885_BOARD_TEVII_S470:
+	case CX23885_BOARD_HAUPPAUGE_HVR1250:
+		/*
+		 * The only boards we handle right now.  However other boards
+		 * using the CX2388x integrated IR controller should be similar
+		 */
+		break;
+	default:
+		return;
+	}
+
+	overrun = events & (V4L2_SUBDEV_IR_RX_SW_FIFO_OVERRUN |
+			    V4L2_SUBDEV_IR_RX_HW_FIFO_OVERRUN);
+
+	data_available = events & (V4L2_SUBDEV_IR_RX_END_OF_RX_DETECTED |
+				   V4L2_SUBDEV_IR_RX_FIFO_SERVICE_REQ);
+
+	if (overrun) {
+		/* If there was a FIFO overrun, stop the device */
+		v4l2_subdev_call(dev->sd_ir, ir, rx_g_parameters, &params);
+		params.enable = false;
+		/* Mitigate race with cx23885_input_ir_stop() */
+		params.shutdown = atomic_read(&dev->ir_input_stopping);
+		v4l2_subdev_call(dev->sd_ir, ir, rx_s_parameters, &params);
+	}
+
+	if (data_available)
+		cx23885_input_process_measurements(dev, overrun);
+
+	if (overrun) {
+		/* If there was a FIFO overrun, clear & restart the device */
+		params.enable = true;
+		/* Mitigate race with cx23885_input_ir_stop() */
+		params.shutdown = atomic_read(&dev->ir_input_stopping);
+		v4l2_subdev_call(dev->sd_ir, ir, rx_s_parameters, &params);
+	}
+}
+
+static int cx23885_input_ir_start(struct cx23885_dev *dev)
+{
+	struct v4l2_subdev_ir_parameters params;
+
+	if (dev->sd_ir == NULL)
+		return -ENODEV;
+
+	atomic_set(&dev->ir_input_stopping, 0);
+
+	v4l2_subdev_call(dev->sd_ir, ir, rx_g_parameters, &params);
+	switch (dev->board) {
+	case CX23885_BOARD_HAUPPAUGE_HVR1270:
+	case CX23885_BOARD_HAUPPAUGE_HVR1850:
+	case CX23885_BOARD_HAUPPAUGE_HVR1290:
+	case CX23885_BOARD_HAUPPAUGE_HVR1250:
+		/*
+		 * The IR controller on this board only returns pulse widths.
+		 * Any other mode setting will fail to set up the device.
+		*/
+		params.mode = V4L2_SUBDEV_IR_MODE_PULSE_WIDTH;
+		params.enable = true;
+		params.interrupt_enable = true;
+		params.shutdown = false;
+
+		/* Setup for baseband compatible with both RC-5 and RC-6A */
+		params.modulation = false;
+		/* RC-5:  2,222,222 ns = 1/36 kHz * 32 cycles * 2 marks * 1.25*/
+		/* RC-6A: 3,333,333 ns = 1/36 kHz * 16 cycles * 6 marks * 1.25*/
+		params.max_pulse_width = 3333333; /* ns */
+		/* RC-5:    666,667 ns = 1/36 kHz * 32 cycles * 1 mark * 0.75 */
+		/* RC-6A:   333,333 ns = 1/36 kHz * 16 cycles * 1 mark * 0.75 */
+		params.noise_filter_min_width = 333333; /* ns */
+		/*
+		 * This board has inverted receive sense:
+		 * mark is received as low logic level;
+		 * falling edges are detected as rising edges; etc.
+		 */
+		params.invert_level = true;
+		break;
+	case CX23885_BOARD_TERRATEC_CINERGY_T_PCIE_DUAL:
+	case CX23885_BOARD_TEVII_S470:
+		/*
+		 * The IR controller on this board only returns pulse widths.
+		 * Any other mode setting will fail to set up the device.
+		 */
+		params.mode = V4L2_SUBDEV_IR_MODE_PULSE_WIDTH;
+		params.enable = true;
+		params.interrupt_enable = true;
+		params.shutdown = false;
+
+		/* Setup for a standard NEC protocol */
+		params.carrier_freq = 37917; /* Hz, 455 kHz/12 for NEC */
+		params.carrier_range_lower = 33000; /* Hz */
+		params.carrier_range_upper = 43000; /* Hz */
+		params.duty_cycle = 33; /* percent, 33 percent for NEC */
+
+		/*
+		 * NEC max pulse width: (64/3)/(455 kHz/12) * 16 nec_units
+		 * (64/3)/(455 kHz/12) * 16 nec_units * 1.375 = 12378022 ns
+		 */
+		params.max_pulse_width = 12378022; /* ns */
+
+		/*
+		 * NEC noise filter min width: (64/3)/(455 kHz/12) * 1 nec_unit
+		 * (64/3)/(455 kHz/12) * 1 nec_units * 0.625 = 351648 ns
+		 */
+		params.noise_filter_min_width = 351648; /* ns */
+
+		params.modulation = false;
+		params.invert_level = true;
+		break;
+	}
+	v4l2_subdev_call(dev->sd_ir, ir, rx_s_parameters, &params);
+	return 0;
+}
+
+static int cx23885_input_ir_open(struct rc_dev *rc)
+{
+	struct cx23885_kernel_ir *kernel_ir = rc->priv;
+
+	if (kernel_ir->cx == NULL)
+		return -ENODEV;
+
+	return cx23885_input_ir_start(kernel_ir->cx);
+}
+
+static void cx23885_input_ir_stop(struct cx23885_dev *dev)
+{
+	struct v4l2_subdev_ir_parameters params;
+
+	if (dev->sd_ir == NULL)
+		return;
+
+	/*
+	 * Stop the sd_ir subdevice from generating notifications and
+	 * scheduling work.
+	 * It is shutdown this way in order to mitigate a race with
+	 * cx23885_input_rx_work_handler() in the overrun case, which could
+	 * re-enable the subdevice.
+	 */
+	atomic_set(&dev->ir_input_stopping, 1);
+	v4l2_subdev_call(dev->sd_ir, ir, rx_g_parameters, &params);
+	while (params.shutdown == false) {
+		params.enable = false;
+		params.interrupt_enable = false;
+		params.shutdown = true;
+		v4l2_subdev_call(dev->sd_ir, ir, rx_s_parameters, &params);
+		v4l2_subdev_call(dev->sd_ir, ir, rx_g_parameters, &params);
+	}
+	flush_work(&dev->cx25840_work);
+	flush_work(&dev->ir_rx_work);
+	flush_work(&dev->ir_tx_work);
+}
+
+static void cx23885_input_ir_close(struct rc_dev *rc)
+{
+	struct cx23885_kernel_ir *kernel_ir = rc->priv;
+
+	if (kernel_ir->cx != NULL)
+		cx23885_input_ir_stop(kernel_ir->cx);
+}
+
+int cx23885_input_init(struct cx23885_dev *dev)
+{
+	struct cx23885_kernel_ir *kernel_ir;
+	struct rc_dev *rc;
+	char *rc_map;
+	enum rc_driver_type driver_type;
+	unsigned long allowed_protos;
+
+	int ret;
+
+	/*
+	 * If the IR device (hardware registers, chip, GPIO lines, etc.) isn't
+	 * encapsulated in a v4l2_subdev, then I'm not going to deal with it.
+	 */
+	if (dev->sd_ir == NULL)
+		return -ENODEV;
+
+	switch (dev->board) {
+	case CX23885_BOARD_HAUPPAUGE_HVR1270:
+	case CX23885_BOARD_HAUPPAUGE_HVR1850:
+	case CX23885_BOARD_HAUPPAUGE_HVR1290:
+	case CX23885_BOARD_HAUPPAUGE_HVR1250:
+		/* Integrated CX2388[58] IR controller */
+		driver_type = RC_DRIVER_IR_RAW;
+		allowed_protos = RC_TYPE_ALL;
+		/* The grey Hauppauge RC-5 remote */
+		rc_map = RC_MAP_HAUPPAUGE;
+		break;
+	case CX23885_BOARD_TERRATEC_CINERGY_T_PCIE_DUAL:
+		/* Integrated CX23885 IR controller */
+		driver_type = RC_DRIVER_IR_RAW;
+		allowed_protos = RC_TYPE_NEC;
+		/* The grey Terratec remote with orange buttons */
+		rc_map = RC_MAP_NEC_TERRATEC_CINERGY_XS;
+		break;
+	case CX23885_BOARD_TEVII_S470:
+		/* Integrated CX23885 IR controller */
+		driver_type = RC_DRIVER_IR_RAW;
+		allowed_protos = RC_TYPE_ALL;
+		/* A guess at the remote */
+		rc_map = RC_MAP_TEVII_NEC;
+		break;
+	default:
+		return -ENODEV;
+	}
+
+	/* cx23885 board instance kernel IR state */
+	kernel_ir = kzalloc(sizeof(struct cx23885_kernel_ir), GFP_KERNEL);
+	if (kernel_ir == NULL)
+		return -ENOMEM;
+
+	kernel_ir->cx = dev;
+	kernel_ir->name = kasprintf(GFP_KERNEL, "cx23885 IR (%s)",
+				    cx23885_boards[dev->board].name);
+	kernel_ir->phys = kasprintf(GFP_KERNEL, "pci-%s/ir0",
+				    pci_name(dev->pci));
+
+	/* input device */
+	rc = rc_allocate_device();
+	if (!rc) {
+		ret = -ENOMEM;
+		goto err_out_free;
+	}
+
+	kernel_ir->rc = rc;
+	rc->input_name = kernel_ir->name;
+	rc->input_phys = kernel_ir->phys;
+	rc->input_id.bustype = BUS_PCI;
+	rc->input_id.version = 1;
+	if (dev->pci->subsystem_vendor) {
+		rc->input_id.vendor  = dev->pci->subsystem_vendor;
+		rc->input_id.product = dev->pci->subsystem_device;
+	} else {
+		rc->input_id.vendor  = dev->pci->vendor;
+		rc->input_id.product = dev->pci->device;
+	}
+	rc->dev.parent = &dev->pci->dev;
+	rc->driver_type = driver_type;
+	rc->allowed_protos = allowed_protos;
+	rc->priv = kernel_ir;
+	rc->open = cx23885_input_ir_open;
+	rc->close = cx23885_input_ir_close;
+	rc->map_name = rc_map;
+	rc->driver_name = MODULE_NAME;
+
+	/* Go */
+	dev->kernel_ir = kernel_ir;
+	ret = rc_register_device(rc);
+	if (ret)
+		goto err_out_stop;
+
+	return 0;
+
+err_out_stop:
+	cx23885_input_ir_stop(dev);
+	dev->kernel_ir = NULL;
+	rc_free_device(rc);
+err_out_free:
+	kfree(kernel_ir->phys);
+	kfree(kernel_ir->name);
+	kfree(kernel_ir);
+	return ret;
+}
+
+void cx23885_input_fini(struct cx23885_dev *dev)
+{
+	/* Always stop the IR hardware from generating interrupts */
+	cx23885_input_ir_stop(dev);
+
+	if (dev->kernel_ir == NULL)
+		return;
+	rc_unregister_device(dev->kernel_ir->rc);
+	kfree(dev->kernel_ir->phys);
+	kfree(dev->kernel_ir->name);
+	kfree(dev->kernel_ir);
+	dev->kernel_ir = NULL;
+}