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, 430 insertions, 0 deletions

diff --git a/drivers/media/usb/stk1160/stk1160-core.c b/drivers/media/usb/stk1160/stk1160-core.c
new file mode 100644
index 000000000000..b62740846061
--- /dev/null
+++ b/drivers/media/usb/stk1160/stk1160-core.c
@@ -0,0 +1,430 @@
+/*
+ * STK1160 driver
+ *
+ * Copyright (C) 2012 Ezequiel Garcia
+ * <elezegarcia--a.t--gmail.com>
+ *
+ * Based on Easycap driver by R.M. Thomas
+ *	Copyright (C) 2010 R.M. Thomas
+ *	<rmthomas--a.t--sciolus.org>
+ *
+ * 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.
+ *
+ * TODO:
+ *
+ * 1. (Try to) detect if we must register ac97 mixer
+ * 2. Support stream at lower speed: lower frame rate or lower frame size.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/slab.h>
+
+#include <linux/usb.h>
+#include <linux/mm.h>
+#include <linux/vmalloc.h>
+#include <media/saa7115.h>
+
+#include "stk1160.h"
+#include "stk1160-reg.h"
+
+static unsigned int input;
+module_param(input, int, 0644);
+MODULE_PARM_DESC(input, "Set default input");
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Ezequiel Garcia");
+MODULE_DESCRIPTION("STK1160 driver");
+
+/* Devices supported by this driver */
+static struct usb_device_id stk1160_id_table[] = {
+	{ USB_DEVICE(0x05e1, 0x0408) },
+	{ }
+};
+MODULE_DEVICE_TABLE(usb, stk1160_id_table);
+
+/* saa7113 I2C address */
+static unsigned short saa7113_addrs[] = {
+	0x4a >> 1,
+	I2C_CLIENT_END
+};
+
+/*
+ * Read/Write stk registers
+ */
+int stk1160_read_reg(struct stk1160 *dev, u16 reg, u8 *value)
+{
+	int ret;
+	int pipe = usb_rcvctrlpipe(dev->udev, 0);
+
+	*value = 0;
+	ret = usb_control_msg(dev->udev, pipe, 0x00,
+			USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
+			0x00, reg, value, sizeof(u8), HZ);
+	if (ret < 0) {
+		stk1160_err("read failed on reg 0x%x (%d)\n",
+			reg, ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+int stk1160_write_reg(struct stk1160 *dev, u16 reg, u16 value)
+{
+	int ret;
+	int pipe = usb_sndctrlpipe(dev->udev, 0);
+
+	ret =  usb_control_msg(dev->udev, pipe, 0x01,
+			USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
+			value, reg, NULL, 0, HZ);
+	if (ret < 0) {
+		stk1160_err("write failed on reg 0x%x (%d)\n",
+			reg, ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+void stk1160_select_input(struct stk1160 *dev)
+{
+	static const u8 gctrl[] = {
+		0x98, 0x90, 0x88, 0x80
+	};
+
+	if (dev->ctl_input < ARRAY_SIZE(gctrl))
+		stk1160_write_reg(dev, STK1160_GCTRL, gctrl[dev->ctl_input]);
+}
+
+/* TODO: We should break this into pieces */
+static void stk1160_reg_reset(struct stk1160 *dev)
+{
+	int i;
+
+	static const struct regval ctl[] = {
+		{STK1160_GCTRL+2, 0x0078},
+
+		{STK1160_RMCTL+1, 0x0000},
+		{STK1160_RMCTL+3, 0x0002},
+
+		{STK1160_PLLSO,   0x0010},
+		{STK1160_PLLSO+1, 0x0000},
+		{STK1160_PLLSO+2, 0x0014},
+		{STK1160_PLLSO+3, 0x000E},
+
+		{STK1160_PLLFD,   0x0046},
+
+		/* Timing generator setup */
+		{STK1160_TIGEN,   0x0012},
+		{STK1160_TICTL,   0x002D},
+		{STK1160_TICTL+1, 0x0001},
+		{STK1160_TICTL+2, 0x0000},
+		{STK1160_TICTL+3, 0x0000},
+		{STK1160_TIGEN,   0x0080},
+
+		{0xffff, 0xffff}
+	};
+
+	for (i = 0; ctl[i].reg != 0xffff; i++)
+		stk1160_write_reg(dev, ctl[i].reg, ctl[i].val);
+}
+
+static void stk1160_release(struct v4l2_device *v4l2_dev)
+{
+	struct stk1160 *dev = container_of(v4l2_dev, struct stk1160, v4l2_dev);
+
+	stk1160_info("releasing all resources\n");
+
+	stk1160_i2c_unregister(dev);
+
+	v4l2_ctrl_handler_free(&dev->ctrl_handler);
+	v4l2_device_unregister(&dev->v4l2_dev);
+	kfree(dev->alt_max_pkt_size);
+	kfree(dev);
+}
+
+/* high bandwidth multiplier, as encoded in highspeed endpoint descriptors */
+#define hb_mult(wMaxPacketSize) (1 + (((wMaxPacketSize) >> 11) & 0x03))
+
+/*
+ * Scan usb interface and populate max_pkt_size array
+ * with information on each alternate setting.
+ * The array should be allocated by the caller.
+ */
+static int stk1160_scan_usb(struct usb_interface *intf, struct usb_device *udev,
+		unsigned int *max_pkt_size)
+{
+	int i, e, sizedescr, size, ifnum;
+	const struct usb_endpoint_descriptor *desc;
+
+	bool has_video = false, has_audio = false;
+	const char *speed;
+
+	ifnum = intf->altsetting[0].desc.bInterfaceNumber;
+
+	/* Get endpoints */
+	for (i = 0; i < intf->num_altsetting; i++) {
+
+		for (e = 0; e < intf->altsetting[i].desc.bNumEndpoints; e++) {
+
+			/* This isn't clear enough, at least to me */
+			desc = &intf->altsetting[i].endpoint[e].desc;
+			sizedescr = le16_to_cpu(desc->wMaxPacketSize);
+			size = sizedescr & 0x7ff;
+
+			if (udev->speed == USB_SPEED_HIGH)
+				size = size * hb_mult(sizedescr);
+
+			if (usb_endpoint_xfer_isoc(desc) &&
+			    usb_endpoint_dir_in(desc)) {
+				switch (desc->bEndpointAddress) {
+				case STK1160_EP_AUDIO:
+					has_audio = true;
+					break;
+				case STK1160_EP_VIDEO:
+					has_video = true;
+					max_pkt_size[i] = size;
+					break;
+				}
+			}
+		}
+	}
+
+	/* Is this even possible? */
+	if (!(has_audio || has_video)) {
+		dev_err(&udev->dev, "no audio or video endpoints found\n");
+		return -ENODEV;
+	}
+
+	switch (udev->speed) {
+	case USB_SPEED_LOW:
+		speed = "1.5";
+		break;
+	case USB_SPEED_FULL:
+		speed = "12";
+		break;
+	case USB_SPEED_HIGH:
+		speed = "480";
+		break;
+	default:
+		speed = "unknown";
+	}
+
+	dev_info(&udev->dev, "New device %s %s @ %s Mbps (%04x:%04x, interface %d, class %d)\n",
+		udev->manufacturer ? udev->manufacturer : "",
+		udev->product ? udev->product : "",
+		speed,
+		le16_to_cpu(udev->descriptor.idVendor),
+		le16_to_cpu(udev->descriptor.idProduct),
+		ifnum,
+		intf->altsetting->desc.bInterfaceNumber);
+
+	/* This should never happen, since we rejected audio interfaces */
+	if (has_audio)
+		dev_warn(&udev->dev, "audio interface %d found.\n\
+				This is not implemented by this driver,\
+				you should use snd-usb-audio instead\n", ifnum);
+
+	if (has_video)
+		dev_info(&udev->dev, "video interface %d found\n",
+				ifnum);
+
+	/*
+	 * Make sure we have 480 Mbps of bandwidth, otherwise things like
+	 * video stream wouldn't likely work, since 12 Mbps is generally
+	 * not enough even for most streams.
+	 */
+	if (udev->speed != USB_SPEED_HIGH)
+		dev_warn(&udev->dev, "must be connected to a high-speed USB 2.0 port\n\
+				You may not be able to stream video smoothly\n");
+
+	return 0;
+}
+
+static int stk1160_probe(struct usb_interface *interface,
+		const struct usb_device_id *id)
+{
+	int rc = 0;
+
+	unsigned int *alt_max_pkt_size;	/* array of wMaxPacketSize */
+	struct usb_device *udev;
+	struct stk1160 *dev;
+
+	udev = interface_to_usbdev(interface);
+
+	/*
+	 * Since usb audio class is supported by snd-usb-audio,
+	 * we reject audio interface.
+	 */
+	if (interface->altsetting[0].desc.bInterfaceClass == USB_CLASS_AUDIO)
+		return -ENODEV;
+
+	/* Alloc an array for all possible max_pkt_size */
+	alt_max_pkt_size = kmalloc(sizeof(alt_max_pkt_size[0]) *
+			interface->num_altsetting, GFP_KERNEL);
+	if (alt_max_pkt_size == NULL)
+		return -ENOMEM;
+
+	/*
+	 * Scan usb posibilities and populate alt_max_pkt_size array.
+	 * Also, check if device speed is fast enough.
+	 */
+	rc = stk1160_scan_usb(interface, udev, alt_max_pkt_size);
+	if (rc < 0) {
+		kfree(alt_max_pkt_size);
+		return rc;
+	}
+
+	dev = kzalloc(sizeof(struct stk1160), GFP_KERNEL);
+	if (dev == NULL) {
+		kfree(alt_max_pkt_size);
+		return -ENOMEM;
+	}
+
+	dev->alt_max_pkt_size = alt_max_pkt_size;
+	dev->udev = udev;
+	dev->num_alt = interface->num_altsetting;
+	dev->ctl_input = input;
+
+	/* We save struct device for debug purposes only */
+	dev->dev = &interface->dev;
+
+	usb_set_intfdata(interface, dev);
+
+	/* initialize videobuf2 stuff */
+	rc = stk1160_vb2_setup(dev);
+	if (rc < 0)
+		goto free_err;
+
+	/*
+	 * There is no need to take any locks here in probe
+	 * because we register the device node as the *last* thing.
+	 */
+	spin_lock_init(&dev->buf_lock);
+	mutex_init(&dev->v4l_lock);
+	mutex_init(&dev->vb_queue_lock);
+
+	rc = v4l2_ctrl_handler_init(&dev->ctrl_handler, 0);
+	if (rc) {
+		stk1160_err("v4l2_ctrl_handler_init failed (%d)\n", rc);
+		goto free_err;
+	}
+
+	/*
+	 * We obtain a v4l2_dev but defer
+	 * registration of video device node as the last thing.
+	 * There is no need to set the name if we give a device struct
+	 */
+	dev->v4l2_dev.release = stk1160_release;
+	dev->v4l2_dev.ctrl_handler = &dev->ctrl_handler;
+	rc = v4l2_device_register(dev->dev, &dev->v4l2_dev);
+	if (rc) {
+		stk1160_err("v4l2_device_register failed (%d)\n", rc);
+		goto free_ctrl;
+	}
+
+	rc = stk1160_i2c_register(dev);
+	if (rc < 0)
+		goto unreg_v4l2;
+
+	/*
+	 * To the best of my knowledge stk1160 boards only have
+	 * saa7113, but it doesn't hurt to support them all.
+	 */
+	dev->sd_saa7115 = v4l2_i2c_new_subdev(&dev->v4l2_dev, &dev->i2c_adap,
+		"saa7115_auto", 0, saa7113_addrs);
+
+	stk1160_info("driver ver %s successfully loaded\n",
+		STK1160_VERSION);
+
+	/* i2c reset saa711x */
+	v4l2_device_call_all(&dev->v4l2_dev, 0, core, reset, 0);
+	v4l2_device_call_all(&dev->v4l2_dev, 0, video, s_routing,
+				0, 0, 0);
+	v4l2_device_call_all(&dev->v4l2_dev, 0, video, s_stream, 0);
+
+	/* reset stk1160 to default values */
+	stk1160_reg_reset(dev);
+
+	/* select default input */
+	stk1160_select_input(dev);
+
+	stk1160_ac97_register(dev);
+
+	rc = stk1160_video_register(dev);
+	if (rc < 0)
+		goto unreg_i2c;
+
+	return 0;
+
+unreg_i2c:
+	stk1160_i2c_unregister(dev);
+unreg_v4l2:
+	v4l2_device_unregister(&dev->v4l2_dev);
+free_ctrl:
+	v4l2_ctrl_handler_free(&dev->ctrl_handler);
+free_err:
+	kfree(alt_max_pkt_size);
+	kfree(dev);
+
+	return rc;
+}
+
+static void stk1160_disconnect(struct usb_interface *interface)
+{
+	struct stk1160 *dev;
+
+	dev = usb_get_intfdata(interface);
+	usb_set_intfdata(interface, NULL);
+
+	/*
+	 * Wait until all current v4l2 operation are finished
+	 * then deallocate resources
+	 */
+	mutex_lock(&dev->vb_queue_lock);
+	mutex_lock(&dev->v4l_lock);
+
+	/* Here is the only place where isoc get released */
+	stk1160_uninit_isoc(dev);
+
+	/* ac97 unregister needs to be done before usb_device is cleared */
+	stk1160_ac97_unregister(dev);
+
+	stk1160_clear_queue(dev);
+
+	video_unregister_device(&dev->vdev);
+	v4l2_device_disconnect(&dev->v4l2_dev);
+
+	/* This way current users can detect device is gone */
+	dev->udev = NULL;
+
+	mutex_unlock(&dev->v4l_lock);
+	mutex_unlock(&dev->vb_queue_lock);
+
+	/*
+	 * This calls stk1160_release if it's the last reference.
+	 * therwise, release is posponed until there are no users left.
+	 */
+	v4l2_device_put(&dev->v4l2_dev);
+}
+
+static struct usb_driver stk1160_usb_driver = {
+	.name = "stk1160",
+	.id_table = stk1160_id_table,
+	.probe = stk1160_probe,
+	.disconnect = stk1160_disconnect,
+};
+
+module_usb_driver(stk1160_usb_driver);