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, 380 insertions, 0 deletions

diff --git a/drivers/media/platform/marvell-ccic/mmp-driver.c b/drivers/media/platform/marvell-ccic/mmp-driver.c
new file mode 100644
index 00000000000..c4c17fe76c0
--- /dev/null
+++ b/drivers/media/platform/marvell-ccic/mmp-driver.c
@@ -0,0 +1,380 @@
+/*
+ * Support for the camera device found on Marvell MMP processors; known
+ * to work with the Armada 610 as used in the OLPC 1.75 system.
+ *
+ * Copyright 2011 Jonathan Corbet <corbet@lwn.net>
+ *
+ * This file may be distributed under the terms of the GNU General
+ * Public License, version 2.
+ */
+
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/i2c-gpio.h>
+#include <linux/interrupt.h>
+#include <linux/spinlock.h>
+#include <linux/slab.h>
+#include <linux/videodev2.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-chip-ident.h>
+#include <media/mmp-camera.h>
+#include <linux/device.h>
+#include <linux/platform_device.h>
+#include <linux/gpio.h>
+#include <linux/io.h>
+#include <linux/delay.h>
+#include <linux/list.h>
+#include <linux/pm.h>
+
+#include "mcam-core.h"
+
+MODULE_ALIAS("platform:mmp-camera");
+MODULE_AUTHOR("Jonathan Corbet <corbet@lwn.net>");
+MODULE_LICENSE("GPL");
+
+struct mmp_camera {
+	void *power_regs;
+	struct platform_device *pdev;
+	struct mcam_camera mcam;
+	struct list_head devlist;
+	int irq;
+};
+
+static inline struct mmp_camera *mcam_to_cam(struct mcam_camera *mcam)
+{
+	return container_of(mcam, struct mmp_camera, mcam);
+}
+
+/*
+ * A silly little infrastructure so we can keep track of our devices.
+ * Chances are that we will never have more than one of them, but
+ * the Armada 610 *does* have two controllers...
+ */
+
+static LIST_HEAD(mmpcam_devices);
+static struct mutex mmpcam_devices_lock;
+
+static void mmpcam_add_device(struct mmp_camera *cam)
+{
+	mutex_lock(&mmpcam_devices_lock);
+	list_add(&cam->devlist, &mmpcam_devices);
+	mutex_unlock(&mmpcam_devices_lock);
+}
+
+static void mmpcam_remove_device(struct mmp_camera *cam)
+{
+	mutex_lock(&mmpcam_devices_lock);
+	list_del(&cam->devlist);
+	mutex_unlock(&mmpcam_devices_lock);
+}
+
+/*
+ * Platform dev remove passes us a platform_device, and there's
+ * no handy unused drvdata to stash a backpointer in.  So just
+ * dig it out of our list.
+ */
+static struct mmp_camera *mmpcam_find_device(struct platform_device *pdev)
+{
+	struct mmp_camera *cam;
+
+	mutex_lock(&mmpcam_devices_lock);
+	list_for_each_entry(cam, &mmpcam_devices, devlist) {
+		if (cam->pdev == pdev) {
+			mutex_unlock(&mmpcam_devices_lock);
+			return cam;
+		}
+	}
+	mutex_unlock(&mmpcam_devices_lock);
+	return NULL;
+}
+
+
+
+
+/*
+ * Power-related registers; this almost certainly belongs
+ * somewhere else.
+ *
+ * ARMADA 610 register manual, sec 7.2.1, p1842.
+ */
+#define CPU_SUBSYS_PMU_BASE	0xd4282800
+#define REG_CCIC_DCGCR		0x28	/* CCIC dyn clock gate ctrl reg */
+#define REG_CCIC_CRCR		0x50	/* CCIC clk reset ctrl reg	*/
+
+/*
+ * Power control.
+ */
+static void mmpcam_power_up_ctlr(struct mmp_camera *cam)
+{
+	iowrite32(0x3f, cam->power_regs + REG_CCIC_DCGCR);
+	iowrite32(0x3805b, cam->power_regs + REG_CCIC_CRCR);
+	mdelay(1);
+}
+
+static void mmpcam_power_up(struct mcam_camera *mcam)
+{
+	struct mmp_camera *cam = mcam_to_cam(mcam);
+	struct mmp_camera_platform_data *pdata;
+/*
+ * Turn on power and clocks to the controller.
+ */
+	mmpcam_power_up_ctlr(cam);
+/*
+ * Provide power to the sensor.
+ */
+	mcam_reg_write(mcam, REG_CLKCTRL, 0x60000002);
+	pdata = cam->pdev->dev.platform_data;
+	gpio_set_value(pdata->sensor_power_gpio, 1);
+	mdelay(5);
+	mcam_reg_clear_bit(mcam, REG_CTRL1, 0x10000000);
+	gpio_set_value(pdata->sensor_reset_gpio, 0); /* reset is active low */
+	mdelay(5);
+	gpio_set_value(pdata->sensor_reset_gpio, 1); /* reset is active low */
+	mdelay(5);
+}
+
+static void mmpcam_power_down(struct mcam_camera *mcam)
+{
+	struct mmp_camera *cam = mcam_to_cam(mcam);
+	struct mmp_camera_platform_data *pdata;
+/*
+ * Turn off clocks and set reset lines
+ */
+	iowrite32(0, cam->power_regs + REG_CCIC_DCGCR);
+	iowrite32(0, cam->power_regs + REG_CCIC_CRCR);
+/*
+ * Shut down the sensor.
+ */
+	pdata = cam->pdev->dev.platform_data;
+	gpio_set_value(pdata->sensor_power_gpio, 0);
+	gpio_set_value(pdata->sensor_reset_gpio, 0);
+}
+
+
+static irqreturn_t mmpcam_irq(int irq, void *data)
+{
+	struct mcam_camera *mcam = data;
+	unsigned int irqs, handled;
+
+	spin_lock(&mcam->dev_lock);
+	irqs = mcam_reg_read(mcam, REG_IRQSTAT);
+	handled = mccic_irq(mcam, irqs);
+	spin_unlock(&mcam->dev_lock);
+	return IRQ_RETVAL(handled);
+}
+
+
+static int mmpcam_probe(struct platform_device *pdev)
+{
+	struct mmp_camera *cam;
+	struct mcam_camera *mcam;
+	struct resource *res;
+	struct mmp_camera_platform_data *pdata;
+	int ret;
+
+	cam = kzalloc(sizeof(*cam), GFP_KERNEL);
+	if (cam == NULL)
+		return -ENOMEM;
+	cam->pdev = pdev;
+	INIT_LIST_HEAD(&cam->devlist);
+
+	mcam = &cam->mcam;
+	mcam->plat_power_up = mmpcam_power_up;
+	mcam->plat_power_down = mmpcam_power_down;
+	mcam->dev = &pdev->dev;
+	mcam->use_smbus = 0;
+	mcam->chip_id = V4L2_IDENT_ARMADA610;
+	mcam->buffer_mode = B_DMA_sg;
+	spin_lock_init(&mcam->dev_lock);
+	/*
+	 * Get our I/O memory.
+	 */
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (res == NULL) {
+		dev_err(&pdev->dev, "no iomem resource!\n");
+		ret = -ENODEV;
+		goto out_free;
+	}
+	mcam->regs = ioremap(res->start, resource_size(res));
+	if (mcam->regs == NULL) {
+		dev_err(&pdev->dev, "MMIO ioremap fail\n");
+		ret = -ENODEV;
+		goto out_free;
+	}
+	/*
+	 * Power/clock memory is elsewhere; get it too.  Perhaps this
+	 * should really be managed outside of this driver?
+	 */
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+	if (res == NULL) {
+		dev_err(&pdev->dev, "no power resource!\n");
+		ret = -ENODEV;
+		goto out_unmap1;
+	}
+	cam->power_regs = ioremap(res->start, resource_size(res));
+	if (cam->power_regs == NULL) {
+		dev_err(&pdev->dev, "power MMIO ioremap fail\n");
+		ret = -ENODEV;
+		goto out_unmap1;
+	}
+	/*
+	 * Find the i2c adapter.  This assumes, of course, that the
+	 * i2c bus is already up and functioning.
+	 */
+	pdata = pdev->dev.platform_data;
+	mcam->i2c_adapter = platform_get_drvdata(pdata->i2c_device);
+	if (mcam->i2c_adapter == NULL) {
+		ret = -ENODEV;
+		dev_err(&pdev->dev, "No i2c adapter\n");
+		goto out_unmap2;
+	}
+	/*
+	 * Sensor GPIO pins.
+	 */
+	ret = gpio_request(pdata->sensor_power_gpio, "cam-power");
+	if (ret) {
+		dev_err(&pdev->dev, "Can't get sensor power gpio %d",
+				pdata->sensor_power_gpio);
+		goto out_unmap2;
+	}
+	gpio_direction_output(pdata->sensor_power_gpio, 0);
+	ret = gpio_request(pdata->sensor_reset_gpio, "cam-reset");
+	if (ret) {
+		dev_err(&pdev->dev, "Can't get sensor reset gpio %d",
+				pdata->sensor_reset_gpio);
+		goto out_gpio;
+	}
+	gpio_direction_output(pdata->sensor_reset_gpio, 0);
+	/*
+	 * Power the device up and hand it off to the core.
+	 */
+	mmpcam_power_up(mcam);
+	ret = mccic_register(mcam);
+	if (ret)
+		goto out_gpio2;
+	/*
+	 * Finally, set up our IRQ now that the core is ready to
+	 * deal with it.
+	 */
+	res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+	if (res == NULL) {
+		ret = -ENODEV;
+		goto out_unregister;
+	}
+	cam->irq = res->start;
+	ret = request_irq(cam->irq, mmpcam_irq, IRQF_SHARED,
+			"mmp-camera", mcam);
+	if (ret == 0) {
+		mmpcam_add_device(cam);
+		return 0;
+	}
+
+out_unregister:
+	mccic_shutdown(mcam);
+out_gpio2:
+	mmpcam_power_down(mcam);
+	gpio_free(pdata->sensor_reset_gpio);
+out_gpio:
+	gpio_free(pdata->sensor_power_gpio);
+out_unmap2:
+	iounmap(cam->power_regs);
+out_unmap1:
+	iounmap(mcam->regs);
+out_free:
+	kfree(cam);
+	return ret;
+}
+
+
+static int mmpcam_remove(struct mmp_camera *cam)
+{
+	struct mcam_camera *mcam = &cam->mcam;
+	struct mmp_camera_platform_data *pdata;
+
+	mmpcam_remove_device(cam);
+	free_irq(cam->irq, mcam);
+	mccic_shutdown(mcam);
+	mmpcam_power_down(mcam);
+	pdata = cam->pdev->dev.platform_data;
+	gpio_free(pdata->sensor_reset_gpio);
+	gpio_free(pdata->sensor_power_gpio);
+	iounmap(cam->power_regs);
+	iounmap(mcam->regs);
+	kfree(cam);
+	return 0;
+}
+
+static int mmpcam_platform_remove(struct platform_device *pdev)
+{
+	struct mmp_camera *cam = mmpcam_find_device(pdev);
+
+	if (cam == NULL)
+		return -ENODEV;
+	return mmpcam_remove(cam);
+}
+
+/*
+ * Suspend/resume support.
+ */
+#ifdef CONFIG_PM
+
+static int mmpcam_suspend(struct platform_device *pdev, pm_message_t state)
+{
+	struct mmp_camera *cam = mmpcam_find_device(pdev);
+
+	if (state.event != PM_EVENT_SUSPEND)
+		return 0;
+	mccic_suspend(&cam->mcam);
+	return 0;
+}
+
+static int mmpcam_resume(struct platform_device *pdev)
+{
+	struct mmp_camera *cam = mmpcam_find_device(pdev);
+
+	/*
+	 * Power up unconditionally just in case the core tries to
+	 * touch a register even if nothing was active before; trust
+	 * me, it's better this way.
+	 */
+	mmpcam_power_up_ctlr(cam);
+	return mccic_resume(&cam->mcam);
+}
+
+#endif
+
+
+static struct platform_driver mmpcam_driver = {
+	.probe		= mmpcam_probe,
+	.remove		= mmpcam_platform_remove,
+#ifdef CONFIG_PM
+	.suspend	= mmpcam_suspend,
+	.resume		= mmpcam_resume,
+#endif
+	.driver = {
+		.name	= "mmp-camera",
+		.owner	= THIS_MODULE
+	}
+};
+
+
+static int __init mmpcam_init_module(void)
+{
+	mutex_init(&mmpcam_devices_lock);
+	return platform_driver_register(&mmpcam_driver);
+}
+
+static void __exit mmpcam_exit_module(void)
+{
+	platform_driver_unregister(&mmpcam_driver);
+	/*
+	 * platform_driver_unregister() should have emptied the list
+	 */
+	if (!list_empty(&mmpcam_devices))
+		printk(KERN_ERR "mmp_camera leaving devices behind\n");
+}
+
+module_init(mmpcam_init_module);
+module_exit(mmpcam_exit_module);