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linux-stable/drivers/media/video/pwc/pwc.h
Hans de Goede ceede9fa89 [media] pwc: Fix locking 
My last locking rework for pwc mistakenly assumed that videbuf2 does its
own locking, but it does not! This patch fixes the missing locking by
moving over the the video_device lock, and introducing a separate lock
for the videobuf2_queue.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-05-14 09:21:59 -03:00

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/* (C) 1999-2003 Nemosoft Unv.
(C) 2004-2006 Luc Saillard (luc@saillard.org)
NOTE: this version of pwc is an unofficial (modified) release of pwc & pcwx
driver and thus may have bugs that are not present in the original version.
Please send bug reports and support requests to <luc@saillard.org>.
The decompression routines have been implemented by reverse-engineering the
Nemosoft binary pwcx module. Caveat emptor.
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.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef PWC_H
#define PWC_H
#include <linux/module.h>
#include <linux/usb.h>
#include <linux/spinlock.h>
#include <linux/wait.h>
#include <linux/mutex.h>
#include <linux/mm.h>
#include <linux/slab.h>
#include <asm/errno.h>
#include <linux/videodev2.h>
#include <media/v4l2-common.h>
#include <media/v4l2-device.h>
#include <media/v4l2-ioctl.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-fh.h>
#include <media/v4l2-event.h>
#include <media/videobuf2-vmalloc.h>
#ifdef CONFIG_USB_PWC_INPUT_EVDEV
#include <linux/input.h>
#endif
#include "pwc-dec1.h"
#include "pwc-dec23.h"
/* Version block */
#define PWC_VERSION "10.0.15"
#define PWC_NAME "pwc"
#define PFX PWC_NAME ": "
/* Trace certain actions in the driver */
#define PWC_DEBUG_LEVEL_MODULE (1<<0)
#define PWC_DEBUG_LEVEL_PROBE (1<<1)
#define PWC_DEBUG_LEVEL_OPEN (1<<2)
#define PWC_DEBUG_LEVEL_READ (1<<3)
#define PWC_DEBUG_LEVEL_MEMORY (1<<4)
#define PWC_DEBUG_LEVEL_FLOW (1<<5)
#define PWC_DEBUG_LEVEL_SIZE (1<<6)
#define PWC_DEBUG_LEVEL_IOCTL (1<<7)
#define PWC_DEBUG_LEVEL_TRACE (1<<8)
#define PWC_DEBUG_MODULE(fmt, args...) PWC_DEBUG(MODULE, fmt, ##args)
#define PWC_DEBUG_PROBE(fmt, args...) PWC_DEBUG(PROBE, fmt, ##args)
#define PWC_DEBUG_OPEN(fmt, args...) PWC_DEBUG(OPEN, fmt, ##args)
#define PWC_DEBUG_READ(fmt, args...) PWC_DEBUG(READ, fmt, ##args)
#define PWC_DEBUG_MEMORY(fmt, args...) PWC_DEBUG(MEMORY, fmt, ##args)
#define PWC_DEBUG_FLOW(fmt, args...) PWC_DEBUG(FLOW, fmt, ##args)
#define PWC_DEBUG_SIZE(fmt, args...) PWC_DEBUG(SIZE, fmt, ##args)
#define PWC_DEBUG_IOCTL(fmt, args...) PWC_DEBUG(IOCTL, fmt, ##args)
#define PWC_DEBUG_TRACE(fmt, args...) PWC_DEBUG(TRACE, fmt, ##args)
#ifdef CONFIG_USB_PWC_DEBUG
#define PWC_DEBUG_LEVEL (PWC_DEBUG_LEVEL_MODULE)
#define PWC_DEBUG(level, fmt, args...) do {\
if ((PWC_DEBUG_LEVEL_ ##level) & pwc_trace) \
printk(KERN_DEBUG PFX fmt, ##args); \
} while (0)
#define PWC_ERROR(fmt, args...) printk(KERN_ERR PFX fmt, ##args)
#define PWC_WARNING(fmt, args...) printk(KERN_WARNING PFX fmt, ##args)
#define PWC_INFO(fmt, args...) printk(KERN_INFO PFX fmt, ##args)
#define PWC_TRACE(fmt, args...) PWC_DEBUG(TRACE, fmt, ##args)
#else /* if ! CONFIG_USB_PWC_DEBUG */
#define PWC_ERROR(fmt, args...) printk(KERN_ERR PFX fmt, ##args)
#define PWC_WARNING(fmt, args...) printk(KERN_WARNING PFX fmt, ##args)
#define PWC_INFO(fmt, args...) printk(KERN_INFO PFX fmt, ##args)
#define PWC_TRACE(fmt, args...) do { } while(0)
#define PWC_DEBUG(level, fmt, args...) do { } while(0)
#define pwc_trace 0
#endif
/* Defines for ToUCam cameras */
#define TOUCAM_HEADER_SIZE 8
#define TOUCAM_TRAILER_SIZE 4
#define FEATURE_MOTOR_PANTILT 0x0001
#define FEATURE_CODEC1 0x0002
#define FEATURE_CODEC2 0x0004
#define MAX_WIDTH 640
#define MAX_HEIGHT 480
/* Ignore errors in the first N frames, to allow for startup delays */
#define FRAME_LOWMARK 5
/* Size and number of buffers for the ISO pipe. */
#define MAX_ISO_BUFS 3
#define ISO_FRAMES_PER_DESC 10
#define ISO_MAX_FRAME_SIZE 960
#define ISO_BUFFER_SIZE (ISO_FRAMES_PER_DESC * ISO_MAX_FRAME_SIZE)
/* Maximum size after decompression is 640x480 YUV data, 1.5 * 640 * 480 */
#define PWC_FRAME_SIZE (460800 + TOUCAM_HEADER_SIZE + TOUCAM_TRAILER_SIZE)
/* Absolute minimum and maximum number of buffers available for mmap() */
#define MIN_FRAMES 2
#define MAX_FRAMES 16
/* Some macros to quickly find the type of a webcam */
#define DEVICE_USE_CODEC1(x) ((x)<675)
#define DEVICE_USE_CODEC2(x) ((x)>=675 && (x)<700)
#define DEVICE_USE_CODEC3(x) ((x)>=700)
#define DEVICE_USE_CODEC23(x) ((x)>=675)
/* Request types: video */
#define SET_LUM_CTL 0x01
#define GET_LUM_CTL 0x02
#define SET_CHROM_CTL 0x03
#define GET_CHROM_CTL 0x04
#define SET_STATUS_CTL 0x05
#define GET_STATUS_CTL 0x06
#define SET_EP_STREAM_CTL 0x07
#define GET_EP_STREAM_CTL 0x08
#define GET_XX_CTL 0x09
#define SET_XX_CTL 0x0A
#define GET_XY_CTL 0x0B
#define SET_XY_CTL 0x0C
#define SET_MPT_CTL 0x0D
#define GET_MPT_CTL 0x0E
/* Selectors for the Luminance controls [GS]ET_LUM_CTL */
#define AGC_MODE_FORMATTER 0x2000
#define PRESET_AGC_FORMATTER 0x2100
#define SHUTTER_MODE_FORMATTER 0x2200
#define PRESET_SHUTTER_FORMATTER 0x2300
#define PRESET_CONTOUR_FORMATTER 0x2400
#define AUTO_CONTOUR_FORMATTER 0x2500
#define BACK_LIGHT_COMPENSATION_FORMATTER 0x2600
#define CONTRAST_FORMATTER 0x2700
#define DYNAMIC_NOISE_CONTROL_FORMATTER 0x2800
#define FLICKERLESS_MODE_FORMATTER 0x2900
#define AE_CONTROL_SPEED 0x2A00
#define BRIGHTNESS_FORMATTER 0x2B00
#define GAMMA_FORMATTER 0x2C00
/* Selectors for the Chrominance controls [GS]ET_CHROM_CTL */
#define WB_MODE_FORMATTER 0x1000
#define AWB_CONTROL_SPEED_FORMATTER 0x1100
#define AWB_CONTROL_DELAY_FORMATTER 0x1200
#define PRESET_MANUAL_RED_GAIN_FORMATTER 0x1300
#define PRESET_MANUAL_BLUE_GAIN_FORMATTER 0x1400
#define COLOUR_MODE_FORMATTER 0x1500
#define SATURATION_MODE_FORMATTER1 0x1600
#define SATURATION_MODE_FORMATTER2 0x1700
/* Selectors for the Status controls [GS]ET_STATUS_CTL */
#define SAVE_USER_DEFAULTS_FORMATTER 0x0200
#define RESTORE_USER_DEFAULTS_FORMATTER 0x0300
#define RESTORE_FACTORY_DEFAULTS_FORMATTER 0x0400
#define READ_AGC_FORMATTER 0x0500
#define READ_SHUTTER_FORMATTER 0x0600
#define READ_RED_GAIN_FORMATTER 0x0700
#define READ_BLUE_GAIN_FORMATTER 0x0800
/* Formatters for the motorized pan & tilt [GS]ET_MPT_CTL */
#define PT_RELATIVE_CONTROL_FORMATTER 0x01
#define PT_RESET_CONTROL_FORMATTER 0x02
#define PT_STATUS_FORMATTER 0x03
/* Enumeration of image sizes */
#define PSZ_SQCIF 0x00
#define PSZ_QSIF 0x01
#define PSZ_QCIF 0x02
#define PSZ_SIF 0x03
#define PSZ_CIF 0x04
#define PSZ_VGA 0x05
#define PSZ_MAX 6
struct pwc_raw_frame {
__le16 type; /* type of the webcam */
__le16 vbandlength; /* Size of 4 lines compressed (used by the
decompressor) */
__u8 cmd[4]; /* the four byte of the command (in case of
nala, only the first 3 bytes is filled) */
__u8 rawframe[0]; /* frame_size = H / 4 * vbandlength */
} __packed;
/* intermediate buffers with raw data from the USB cam */
struct pwc_frame_buf
{
struct vb2_buffer vb; /* common v4l buffer stuff -- must be first */
struct list_head list;
void *data;
int filled; /* number of bytes filled */
};
struct pwc_device
{
struct video_device vdev;
struct v4l2_device v4l2_dev;
/* videobuf2 queue and queued buffers list */
struct vb2_queue vb_queue;
struct list_head queued_bufs;
spinlock_t queued_bufs_lock; /* Protects queued_bufs */
/* Note if taking both locks v4l2_lock must always be locked first! */
struct mutex v4l2_lock; /* Protects everything else */
struct mutex vb_queue_lock; /* Protects vb_queue and capt_file */
/* Pointer to our usb_device, will be NULL after unplug */
struct usb_device *udev; /* Both mutexes most be hold when setting! */
/* type of cam (645, 646, 675, 680, 690, 720, 730, 740, 750) */
int type;
int release; /* release number */
int features; /* feature bits */
/*** Video data ***/
struct file *capt_file; /* file doing video capture */
int vendpoint; /* video isoc endpoint */
int vcinterface; /* video control interface */
int valternate; /* alternate interface needed */
int vframes; /* frames-per-second */
int pixfmt; /* pixelformat: V4L2_PIX_FMT_YUV420 or _PWCX */
int vframe_count; /* received frames */
int vmax_packet_size; /* USB maxpacket size */
int vlast_packet_size; /* for frame synchronisation */
int visoc_errors; /* number of contiguous ISOC errors */
int vbandlength; /* compressed band length; 0 is uncompressed */
char vsync; /* used by isoc handler */
char vmirror; /* for ToUCaM series */
char power_save; /* Do powersaving for this cam */
unsigned char cmd_buf[13];
unsigned char *ctrl_buf;
struct urb *urbs[MAX_ISO_BUFS];
/*
* Frame currently being filled, this only gets touched by the
* isoc urb complete handler, and by stream start / stop since
* start / stop touch it before / after starting / killing the urbs
* no locking is needed around this
*/
struct pwc_frame_buf *fill_buf;
int frame_header_size, frame_trailer_size;
int frame_size;
int frame_total_size; /* including header & trailer */
int drop_frames;
union { /* private data for decompression engine */
struct pwc_dec1_private dec1;
struct pwc_dec23_private dec23;
};
/*
* We have an 'image' and a 'view', where 'image' is the fixed-size img
* as delivered by the camera, and 'view' is the size requested by the
* program. The camera image is centered in this viewport, laced with
* a gray or black border. view_min <= image <= view <= view_max;
*/
int image_mask; /* supported sizes */
int width, height; /* current resolution */
#ifdef CONFIG_USB_PWC_INPUT_EVDEV
struct input_dev *button_dev; /* webcam snapshot button input */
char button_phys[64];
#endif
/* controls */
struct v4l2_ctrl_handler ctrl_handler;
u16 saturation_fmt;
struct v4l2_ctrl *brightness;
struct v4l2_ctrl *contrast;
struct v4l2_ctrl *saturation;
struct v4l2_ctrl *gamma;
struct {
/* awb / red-blue balance cluster */
struct v4l2_ctrl *auto_white_balance;
struct v4l2_ctrl *red_balance;
struct v4l2_ctrl *blue_balance;
/* usb ctrl transfers are slow, so we cache things */
int color_bal_valid;
unsigned long last_color_bal_update; /* In jiffies */
s32 last_red_balance;
s32 last_blue_balance;
};
struct {
/* autogain / gain cluster */
struct v4l2_ctrl *autogain;
struct v4l2_ctrl *gain;
int gain_valid;
unsigned long last_gain_update; /* In jiffies */
s32 last_gain;
};
struct {
/* exposure_auto / exposure cluster */
struct v4l2_ctrl *exposure_auto;
struct v4l2_ctrl *exposure;
int exposure_valid;
unsigned long last_exposure_update; /* In jiffies */
s32 last_exposure;
};
struct v4l2_ctrl *colorfx;
struct {
/* autocontour/contour cluster */
struct v4l2_ctrl *autocontour;
struct v4l2_ctrl *contour;
};
struct v4l2_ctrl *backlight;
struct v4l2_ctrl *flicker;
struct v4l2_ctrl *noise_reduction;
struct v4l2_ctrl *save_user;
struct v4l2_ctrl *restore_user;
struct v4l2_ctrl *restore_factory;
struct v4l2_ctrl *awb_speed;
struct v4l2_ctrl *awb_delay;
struct {
/* motor control cluster */
struct v4l2_ctrl *motor_pan;
struct v4l2_ctrl *motor_tilt;
struct v4l2_ctrl *motor_pan_reset;
struct v4l2_ctrl *motor_tilt_reset;
};
/* CODEC3 models have both gain and exposure controlled by autogain */
struct v4l2_ctrl *autogain_expo_cluster[3];
};
/* Global variables */
#ifdef CONFIG_USB_PWC_DEBUG
extern int pwc_trace;
#endif
int pwc_test_n_set_capt_file(struct pwc_device *pdev, struct file *file);
/** Functions in pwc-misc.c */
/* sizes in pixels */
extern const int pwc_image_sizes[PSZ_MAX][2];
int pwc_get_size(struct pwc_device *pdev, int width, int height);
void pwc_construct(struct pwc_device *pdev);
/** Functions in pwc-ctrl.c */
/* Request a certain video mode. Returns < 0 if not possible */
extern int pwc_set_video_mode(struct pwc_device *pdev, int width, int height,
int pixfmt, int frames, int *compression, int send_to_cam);
extern unsigned int pwc_get_fps(struct pwc_device *pdev, unsigned int index, unsigned int size);
extern int pwc_set_leds(struct pwc_device *pdev, int on_value, int off_value);
extern int pwc_get_cmos_sensor(struct pwc_device *pdev, int *sensor);
extern int send_control_msg(struct pwc_device *pdev,
u8 request, u16 value, void *buf, int buflen);
/* Control get / set helpers */
int pwc_get_u8_ctrl(struct pwc_device *pdev, u8 request, u16 value, int *data);
int pwc_set_u8_ctrl(struct pwc_device *pdev, u8 request, u16 value, u8 data);
int pwc_get_s8_ctrl(struct pwc_device *pdev, u8 request, u16 value, int *data);
#define pwc_set_s8_ctrl pwc_set_u8_ctrl
int pwc_get_u16_ctrl(struct pwc_device *pdev, u8 request, u16 value, int *dat);
int pwc_set_u16_ctrl(struct pwc_device *pdev, u8 request, u16 value, u16 data);
int pwc_button_ctrl(struct pwc_device *pdev, u16 value);
int pwc_init_controls(struct pwc_device *pdev);
/* Power down or up the camera; not supported by all models */
extern void pwc_camera_power(struct pwc_device *pdev, int power);
extern const struct v4l2_ioctl_ops pwc_ioctl_ops;
/** pwc-uncompress.c */
/* Expand frame to image, possibly including decompression. Uses read_frame and fill_image */
int pwc_decompress(struct pwc_device *pdev, struct pwc_frame_buf *fbuf);
#endif
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