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Commit ccad7789 authored by Luca Risolia's avatar Luca Risolia Committed by Greg Kroah-Hartman
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[PATCH] USB: ET61X[12]51 driver updates 



USB: ET61X[12]51 driver updates

Changes: + new, - removed, * cleanup, @ bugfix

@ Fix stream_interrupt()
@ Fix vidioc_enum_input() and split vidioc_gs_input()
@ Need usb_get|put_dev() when disconnecting, if the device is open
* Use wait_event_interruptible_timeout() instead of wait_event_interruptible()
  when waiting for video frames
* replace wake_up_interruptible(&wait_stream) with wake_up(&wait_stream)
* Cleanups and updates in the documentation
* Use mutexes instead of semaphores
+ Use per-device sensor structures
+ Add support for PAS202BCA image sensors
+ Add frame_timeout module parameter

Signed-off-by: default avatarLuca Risolia <luca.risolia@studio.unibo.it>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent 2ffab02f

Documentation/usb/et61x251.txt

+9 −1
Original line number Diff line number Diff line
@@ -176,6 +176,14 @@ Description: Force the application to unmap previously mapped buffer memory 
                1 = force memory unmapping (save memory)

Default:        0

-------------------------------------------------------------------------------

Name:           frame_timeout

Type:           uint array (min = 0, max = 64)

Syntax:         <n[,...]>

Description:    Timeout for a video frame in seconds. This parameter is

                specific for each detected camera. This parameter can be

                changed at runtime thanks to the /sys filesystem interface.

Default:        2

-------------------------------------------------------------------------------

Name:           debug

Type:           ushort

Syntax:         <n>
@@ -266,7 +274,7 @@ the V4L2 interface. 




10. Notes for V4L2 application developers

========================================

=========================================

This driver follows the V4L2 API specifications. In particular, it enforces two

rules:

drivers/usb/media/et61x251.h

+21 −7
Original line number Diff line number Diff line
@@ -33,7 +33,9 @@ 
#include <linux/types.h>

#include <linux/param.h>

#include <linux/rwsem.h>

#include <asm/semaphore.h>

#include <linux/mutex.h>

#include <linux/stddef.h>

#include <linux/string.h>



#include "et61x251_sensor.h"
@@ -51,6 +53,7 @@ 
#define ET61X251_ALTERNATE_SETTING   13

#define ET61X251_URB_TIMEOUT         msecs_to_jiffies(2 * ET61X251_ISO_PACKETS)

#define ET61X251_CTRL_TIMEOUT        100

#define ET61X251_FRAME_TIMEOUT       2



/*****************************************************************************/
@@ -127,15 +130,16 @@ struct et61x251_sysfs_attr { 


struct et61x251_module_param {

	u8 force_munmap;

	u16 frame_timeout;

};



static DECLARE_MUTEX(et61x251_sysfs_lock);

static DEFINE_MUTEX(et61x251_sysfs_lock);

static DECLARE_RWSEM(et61x251_disconnect);



struct et61x251_device {

	struct video_device* v4ldev;



	struct et61x251_sensor* sensor;

	struct et61x251_sensor sensor;



	struct usb_device* usbdev;

	struct urb* urb[ET61X251_URBS];
@@ -157,19 +161,28 @@ struct et61x251_device { 
	enum et61x251_dev_state state;

	u8 users;



	struct semaphore dev_sem, fileop_sem;

	struct mutex dev_mutex, fileop_mutex;

	spinlock_t queue_lock;

	wait_queue_head_t open, wait_frame, wait_stream;

};



/*****************************************************************************/



struct et61x251_device*

et61x251_match_id(struct et61x251_device* cam, const struct usb_device_id *id)

{

	if (usb_match_id(usb_ifnum_to_if(cam->usbdev, 0), id))

		return cam;



	return NULL;

}





void

et61x251_attach_sensor(struct et61x251_device* cam,

                       struct et61x251_sensor* sensor)

{

	cam->sensor = sensor;

	cam->sensor->usbdev = cam->usbdev;

	memcpy(&cam->sensor, sensor, sizeof(struct et61x251_sensor));

}



/*****************************************************************************/
@@ -212,7 +225,8 @@ do { \ 


#undef PDBG

#define PDBG(fmt, args...)                                                    \

dev_info(&cam->dev, "[%s:%d] " fmt "\n", __FUNCTION__, __LINE__ , ## args)

dev_info(&cam->usbdev->dev, "[%s:%d] " fmt "\n",                              \

         __FUNCTION__, __LINE__ , ## args)



#undef PDBGG

#define PDBGG(fmt, args...) do {;} while(0) /* placeholder */