From 8488726038ad8c333e24f035a913f02bc6f3142d Mon Sep 17 00:00:00 2001 From: Mauro Carvalho Chehab Date: Mon, 12 Jan 2009 05:50:17 +0000 Subject: pwc: add support for webcam snapshot button MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Nam Phạm Thành This patch adds support for Philips webcam snapshot button as an event input device, for consistency with other webcam drivers. Signed-off-by: Pham Thanh Nam Signed-off-by: Mauro Carvalho Chehab --- linux/drivers/media/video/pwc/pwc-if.c | 85 ++++++++++++++++++++++++++++------ 1 file changed, 72 insertions(+), 13 deletions(-) (limited to 'linux/drivers/media/video/pwc/pwc-if.c') diff --git a/linux/drivers/media/video/pwc/pwc-if.c b/linux/drivers/media/video/pwc/pwc-if.c index e314a6383..49a918636 100644 --- a/linux/drivers/media/video/pwc/pwc-if.c +++ b/linux/drivers/media/video/pwc/pwc-if.c @@ -53,6 +53,7 @@ - Xavier Roche: QuickCam Pro 4000 ID - Jens Knudsen: QuickCam Zoom ID - J. Debert: QuickCam for Notebooks ID + - Pham Thanh Nam: webcam snapshot button as an event input device */ #include @@ -61,6 +62,13 @@ #include #include #include +#ifdef CONFIG_USB_PWC_INPUT_EVDEV +#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 18) +#include +#else +#include +#endif +#endif #include #include @@ -586,6 +594,23 @@ static void pwc_frame_dumped(struct pwc_device *pdev) pdev->vframe_count); } +static void pwc_snapshot_button(struct pwc_device *pdev, int down) +{ + if (down) { + PWC_TRACE("Snapshot button pressed.\n"); + pdev->snapshot_button_status = 1; + } else { + PWC_TRACE("Snapshot button released.\n"); + } + +#ifdef CONFIG_USB_PWC_INPUT_EVDEV + if (pdev->button_dev) { + input_report_key(pdev->button_dev, BTN_0, down); + input_sync(pdev->button_dev); + } +#endif +} + static int pwc_rcv_short_packet(struct pwc_device *pdev, const struct pwc_frame_buf *fbuf) { int awake = 0; @@ -603,13 +628,7 @@ static int pwc_rcv_short_packet(struct pwc_device *pdev, const struct pwc_frame_ pdev->vframes_error++; } if ((ptr[0] ^ pdev->vmirror) & 0x01) { - if (ptr[0] & 0x01) { - pdev->snapshot_button_status = 1; - PWC_TRACE("Snapshot button pressed.\n"); - } - else { - PWC_TRACE("Snapshot button released.\n"); - } + pwc_snapshot_button(pdev, ptr[0] & 0x01); } if ((ptr[0] ^ pdev->vmirror) & 0x02) { if (ptr[0] & 0x02) @@ -633,12 +652,7 @@ static int pwc_rcv_short_packet(struct pwc_device *pdev, const struct pwc_frame_ else if (pdev->type == 740 || pdev->type == 720) { unsigned char *ptr = (unsigned char *)fbuf->data; if ((ptr[0] ^ pdev->vmirror) & 0x01) { - if (ptr[0] & 0x01) { - pdev->snapshot_button_status = 1; - PWC_TRACE("Snapshot button pressed.\n"); - } - else - PWC_TRACE("Snapshot button released.\n"); + pwc_snapshot_button(pdev, ptr[0] & 0x01); } pdev->vmirror = ptr[0] & 0x03; } @@ -1220,6 +1234,15 @@ static void pwc_cleanup(struct pwc_device *pdev) { pwc_remove_sysfs_files(pdev->vdev); video_unregister_device(pdev->vdev); + +#ifdef CONFIG_USB_PWC_INPUT_EVDEV + if (pdev->button_dev) { + input_unregister_device(pdev->button_dev); + input_free_device(pdev->button_dev); + kfree(pdev->button_dev->phys); + pdev->button_dev = NULL; + } +#endif } /* Note that all cleanup is done in the reverse order as in _open */ @@ -1487,6 +1510,9 @@ static int usb_pwc_probe(struct usb_interface *intf, const struct usb_device_id int features = 0; int video_nr = -1; /* default: use next available device */ char serial_number[30], *name; +#ifdef CONFIG_USB_PWC_INPUT_EVDEV + char *phys = NULL; +#endif vendor_id = le16_to_cpu(udev->descriptor.idVendor); product_id = le16_to_cpu(udev->descriptor.idProduct); @@ -1811,6 +1837,39 @@ static int usb_pwc_probe(struct usb_interface *intf, const struct usb_device_id pwc_set_leds(pdev, 0, 0); pwc_camera_power(pdev, 0); +#ifdef CONFIG_USB_PWC_INPUT_EVDEV + /* register webcam snapshot button input device */ + pdev->button_dev = input_allocate_device(); + if (!pdev->button_dev) { + PWC_ERROR("Err, insufficient memory for webcam snapshot button device."); + return -ENOMEM; + } + + pdev->button_dev->name = "PWC snapshot button"; + phys = kasprintf(GFP_KERNEL,"usb-%s-%s", pdev->udev->bus->bus_name, pdev->udev->devpath); + if (!phys) { + input_free_device(pdev->button_dev); + return -ENOMEM; + } + pdev->button_dev->phys = phys; + usb_to_input_id(pdev->udev, &pdev->button_dev->id); +#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 22) + pdev->button_dev->dev.parent = &pdev->udev->dev; +#else + pdev->button_dev->cdev.dev = &pdev->udev->dev; +#endif + pdev->button_dev->evbit[0] = BIT_MASK(EV_KEY); + pdev->button_dev->keybit[BIT_WORD(BTN_0)] = BIT_MASK(BTN_0); + + rc = input_register_device(pdev->button_dev); + if (rc) { + input_free_device(pdev->button_dev); + kfree(pdev->button_dev->phys); + pdev->button_dev = NULL; + return rc; + } +#endif + return 0; err_unreg: -- cgit v1.2.3