On Friday 04 September 2009 07:15:07 Dmitry Torokhov wrote:
> From: Bastien Nocera <had...@hadess.net>
>
> Register an input device with one button, and for the supported
> OV511 webcams, poll and check whether the snapshot button has been
> pressed on each new frame.
>
> [d...@mail.ru: fix freeing of phys, plug into Kconfig, make compile]
> Signed-off-by: Bastien Nocera <had...@hadess.net>
> Signed-off-by: Dmitry Torokhov <d...@mail.ru>
> ---
>
> Mauro,
>
> This is something that's been sitting in my queue for quite some
> time, please consider applying.
>
> Thanks!
>
> drivers/media/video/Kconfig | 8 +++
> drivers/media/video/ov511.c | 109
> +++++++++++++++++++++++++++++++++++++++---- drivers/media/video/ov511.h |
> 8 +++
> 3 files changed, 116 insertions(+), 9 deletions(-)
>
>
> diff --git a/drivers/media/video/Kconfig b/drivers/media/video/Kconfig
> index dcf9fa9..42573e0 100644
> --- a/drivers/media/video/Kconfig
> +++ b/drivers/media/video/Kconfig
> @@ -888,6 +888,14 @@ config USB_OV511
> To compile this driver as a module, choose M here: the
> module will be called ov511.
>
> +config USB_OV511_SNAPSHOT_BUTTON
> + bool "USB OV511 Snapshot Button support"
> + depends on USB_OV511
> + depends on INPUT
> + ---help---
> + Say Y here if you want the driver to report snapshot button through
> + input layer.
> +
> config USB_SE401
> tristate "USB SE401 Camera support"
> depends on VIDEO_V4L1
> diff --git a/drivers/media/video/ov511.c b/drivers/media/video/ov511.c
> index 0bc2cf5..484165c 100644
> --- a/drivers/media/video/ov511.c
> +++ b/drivers/media/video/ov511.c
> @@ -44,6 +44,8 @@
> #include <asm/processor.h>
> #include <linux/mm.h>
> #include <linux/device.h>
> +#include <linux/input.h>
> +#include <linux/usb/input.h>
>
> #if defined (__i386__)
> #include <asm/cpufeature.h>
> @@ -92,7 +94,7 @@ static int cams = 1;
> static int compress;
> static int testpat;
> static int dumppix;
> -static int led = 1;
> +static int led = 1;
There's a lot of white space cleanup in the patch that's unrelated to the
subject. Could you put that in a separate patch ?
> static int dump_bridge;
> static int dump_sensor;
> static int printph;
> @@ -352,6 +354,83 @@ rvfree(void *mem, unsigned long size)
>
> /**********************************************************************
> *
> + * Input device
> + *
> + **********************************************************************/
> +#ifdef CONFIG_USB_OV511_SNAPSHOT_BUTTON
> +
> +static int ov511_input_init(struct usb_ov511 *ov)
> +{
> + struct usb_device *udev = ov->dev;
> + struct input_dev *input;
> + int err = -ENOMEM;
> +
> + input = input_allocate_device();
> + if (!input)
> + goto err_out;
> +
> + usb_make_path(udev, ov->key_phys, OV511_KEY_PHYS_SIZE);
> + strlcat(ov->key_phys, "/input0", OV511_KEY_PHYS_SIZE);
What about sizeof(ov->key_phys) instead of OV511_KEY_PHYS_SIZE ?
> +
> + input->name = "OV511 Snapshot Button";
> + input->phys = ov->key_phys;
> + usb_to_input_id(udev, &input->id);
> + input->dev.parent = &udev->dev;
> +
> + __set_bit(EV_KEY, input->evbit);
> + __set_bit(KEY_CAMERA, input->keybit);
> +
> + err = input_register_device(input);
> + if (err)
> + goto err_out;
> +
> + ov->key_input = input;
> + return 0;
> +
> +err_out:
> + input_free_device(input);
> + return err;
> +}
> +
> +static void ov511_input_cleanup(struct usb_ov511 *ov)
> +{
> + if (ov->key_input) {
> + input_unregister_device(ov->key_input);
> + ov->key_input = NULL;
> + }
> +}
> +
> +static void ov511_input_report_key(struct usb_ov511 *ov)
> +{
> + struct input_dev *input = ov->key_input;
> +
> + if (input) {
> + input_report_key(input, KEY_CAMERA, 1);
> + input_sync(input);
> + input_report_key(input, KEY_CAMERA, 0);
> + input_sync(input);
> + }
> +}
> +
> +#else
> +
> +static inline int ov511_input_init(struct usb_ov511 *ov)
> +{
> + return 0;
> +}
> +
> +static inline void ov511_input_cleanup(struct usb_ov511 *ov)
> +{
> +}
> +
> +static inline void ov511_input_report_key(struct usb_ov511 *ov)
> +{
> +}
> +
> +#endif /* CONFIG_USB_OV511_SNAPSHOT_BUTTON */
> +
> +/**********************************************************************
> + *
> * Register I/O
> *
> **********************************************************************/
> @@ -1105,7 +1184,6 @@ ov51x_clear_snapshot(struct usb_ov511 *ov)
> }
> }
>
> -#if 0
> /* Checks the status of the snapshot button. Returns 1 if it was pressed
> since * it was last cleared, and zero in all other cases (including errors)
> */ static int
> @@ -1130,7 +1208,6 @@ ov51x_check_snapshot(struct usb_ov511 *ov)
>
> return status;
> }
> -#endif
>
> /* This does an initial reset of an OmniVision sensor and ensures that I2C
> * is synchronized. Returns <0 for failure.
> @@ -3149,10 +3226,10 @@ ov51x_postprocess_yuv420(struct usb_ov511 *ov,
> struct ov511_frame *frame) }
>
> /* Post-processes the specified frame. This consists of:
> - * 1. Decompress frame, if necessary
> + * 1. Decompress frame, if necessary
> * 2. Deinterlace frame and scale to proper size, if necessary
> - * 3. Convert from YUV planar to destination format, if necessary
> - * 4. Fix the RGB offset, if necessary
> + * 3. Convert from YUV planar to destination format, if necessary
> + * 4. Fix the RGB offset, if necessary
> */
> static void
> ov51x_postprocess(struct usb_ov511 *ov, struct ov511_frame *frame)
> @@ -4387,6 +4464,11 @@ redo:
> if ((ov->snap_enabled) && (frame->snapshot)) {
> frame->snapshot = 0;
> ov51x_clear_snapshot(ov);
> + } else if (!ov->snap_enabled && ov->bclass ==
> BCL_OV511) {
> + if (ov51x_check_snapshot(ov) == 1) {
> + ov511_input_report_key(ov);
> + ov51x_clear_snapshot(ov);
> + }
> }
>
> /* Decompression, format conversion, etc... */
> @@ -5237,7 +5319,7 @@ ov511_configure(struct usb_ov511 *ov)
> };
>
> static struct ov511_regvals aRegvalsNorm511[] = {
> - { OV511_REG_BUS, R511_DRAM_FLOW_CTL, 0x01 },
> + { OV511_REG_BUS, R511_DRAM_FLOW_CTL, 0x01 },
> { OV511_REG_BUS, R51x_SYS_SNAP, 0x00 },
> { OV511_REG_BUS, R51x_SYS_SNAP, 0x02 },
> { OV511_REG_BUS, R51x_SYS_SNAP, 0x00 },
> @@ -5400,7 +5482,7 @@ ov518_configure(struct usb_ov511 *ov)
> static struct ov511_regvals aRegvalsNorm518[] = {
> { OV511_REG_BUS, R51x_SYS_SNAP, 0x02 }, /* Reset */
> { OV511_REG_BUS, R51x_SYS_SNAP, 0x01 }, /* Enable */
> - { OV511_REG_BUS, 0x31, 0x0f },
> + { OV511_REG_BUS, 0x31, 0x0f },
> { OV511_REG_BUS, 0x5d, 0x03 },
> { OV511_REG_BUS, 0x24, 0x9f },
> { OV511_REG_BUS, 0x25, 0x90 },
> @@ -5413,7 +5495,7 @@ ov518_configure(struct usb_ov511 *ov)
> static struct ov511_regvals aRegvalsNorm518Plus[] = {
> { OV511_REG_BUS, R51x_SYS_SNAP, 0x02 }, /* Reset */
> { OV511_REG_BUS, R51x_SYS_SNAP, 0x01 }, /* Enable */
> - { OV511_REG_BUS, 0x31, 0x0f },
> + { OV511_REG_BUS, 0x31, 0x0f },
> { OV511_REG_BUS, 0x5d, 0x03 },
> { OV511_REG_BUS, 0x24, 0x9f },
> { OV511_REG_BUS, 0x25, 0x90 },
> @@ -5880,6 +5962,13 @@ ov51x_probe(struct usb_interface *intf, const struct
> usb_device_id *id)
>
> mutex_lock(&ov->lock);
>
> + /* Snapshot is currently only supported on OV511,
> + * so no need to register the input device if it's not supported */
> + if (!ov->snap_enabled && ov->bclass == BCL_OV511) {
> + if (ov511_input_init(ov) < 0)
> + dev_warn(&ov->dev->dev, "Could not register input
> device\n");
> + }
> +
> return 0;
>
> error:
> @@ -5928,6 +6017,8 @@ ov51x_disconnect(struct usb_interface *intf)
> if (ov->vdev)
> video_unregister_device(ov->vdev);
>
> + ov511_input_cleanup(ov);
> +
> for (n = 0; n < OV511_NUMFRAMES; n++)
> ov->frame[n].grabstate = FRAME_ERROR;
>
> diff --git a/drivers/media/video/ov511.h b/drivers/media/video/ov511.h
> index c450c92..7c0ade1 100644
> --- a/drivers/media/video/ov511.h
> +++ b/drivers/media/video/ov511.h
> @@ -259,6 +259,9 @@
> /* Size of usb_make_path() buffer */
> #define OV511_USB_PATH_LEN 64
>
> +/* Size of 'phys' field for the snapshot button input device */
> +#define OV511_KEY_PHYS_SIZE 64
> +
> /* Bridge types */
> enum {
> BRG_UNKNOWN,
> @@ -469,6 +472,11 @@ struct usb_ov511 {
>
> int snap_enabled; /* Snapshot mode enabled */
>
> +#ifdef CONFIG_USB_OV511_SNAPSHOT_BUTTON
> + struct input_dev *key_input;
> + char key_phys[OV511_KEY_PHYS_SIZE];
> +#endif
> +
> int bridge; /* Type of bridge (BRG_*) */
> int bclass; /* Class of bridge (BCL_*) */
> int sensor; /* Type of image sensor chip (SEN_*) */
--
Laurent Pinchart
--
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