2485eb0a55
Consistent handling of VIDEO_PALETTE_YUYV and VIDEO_PALETTE_YUV422 Signed-off-by: Andrea A Odetti <audetto@tiscali.it> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
987 lines
24 KiB
C
987 lines
24 KiB
C
/*
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Winbond w9966cf Webcam parport driver.
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Version 0.32
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Copyright (C) 2001 Jakob Kemi <jakob.kemi@post.utfors.se>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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/*
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Supported devices:
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*Lifeview FlyCam Supra (using the Philips saa7111a chip)
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Does any other model using the w9966 interface chip exist ?
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Todo:
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*Add a working EPP mode, since DMA ECP read isn't implemented
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in the parport drivers. (That's why it's so sloow)
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*Add support for other ccd-control chips than the saa7111
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please send me feedback on what kind of chips you have.
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*Add proper probing. I don't know what's wrong with the IEEE1284
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parport drivers but (IEEE1284_MODE_NIBBLE|IEEE1284_DEVICE_ID)
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and nibble read seems to be broken for some peripherals.
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*Add probing for onboard SRAM, port directions etc. (if possible)
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*Add support for the hardware compressed modes (maybe using v4l2)
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*Fix better support for the capture window (no skewed images, v4l
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interface to capt. window)
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*Probably some bugs that I don't know of
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Please support me by sending feedback!
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Changes:
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Alan Cox: Removed RGB mode for kernel merge, added THIS_MODULE
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and owner support for newer module locks
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/delay.h>
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#include <linux/videodev.h>
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#include <media/v4l2-common.h>
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#include <linux/parport.h>
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//#define DEBUG // Undef me for production
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#ifdef DEBUG
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#define DPRINTF(x, a...) printk(KERN_DEBUG "W9966: %s(): "x, __FUNCTION__ , ##a)
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#else
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#define DPRINTF(x...)
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#endif
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/*
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* Defines, simple typedefs etc.
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*/
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#define W9966_DRIVERNAME "W9966CF Webcam"
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#define W9966_MAXCAMS 4 // Maximum number of cameras
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#define W9966_RBUFFER 2048 // Read buffer (must be an even number)
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#define W9966_SRAMSIZE 131072 // 128kb
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#define W9966_SRAMID 0x02 // check w9966cf.pdf
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// Empirically determined window limits
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#define W9966_WND_MIN_X 16
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#define W9966_WND_MIN_Y 14
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#define W9966_WND_MAX_X 705
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#define W9966_WND_MAX_Y 253
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#define W9966_WND_MAX_W (W9966_WND_MAX_X - W9966_WND_MIN_X)
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#define W9966_WND_MAX_H (W9966_WND_MAX_Y - W9966_WND_MIN_Y)
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// Keep track of our current state
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#define W9966_STATE_PDEV 0x01
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#define W9966_STATE_CLAIMED 0x02
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#define W9966_STATE_VDEV 0x04
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#define W9966_I2C_W_ID 0x48
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#define W9966_I2C_R_ID 0x49
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#define W9966_I2C_R_DATA 0x08
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#define W9966_I2C_R_CLOCK 0x04
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#define W9966_I2C_W_DATA 0x02
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#define W9966_I2C_W_CLOCK 0x01
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struct w9966_dev {
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unsigned char dev_state;
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unsigned char i2c_state;
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unsigned short ppmode;
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struct parport* pport;
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struct pardevice* pdev;
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struct video_device vdev;
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unsigned short width;
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unsigned short height;
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unsigned char brightness;
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signed char contrast;
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signed char color;
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signed char hue;
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};
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/*
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* Module specific properties
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*/
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MODULE_AUTHOR("Jakob Kemi <jakob.kemi@post.utfors.se>");
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MODULE_DESCRIPTION("Winbond w9966cf WebCam driver (0.32)");
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MODULE_LICENSE("GPL");
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#ifdef MODULE
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static const char* pardev[] = {[0 ... W9966_MAXCAMS] = ""};
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#else
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static const char* pardev[] = {[0 ... W9966_MAXCAMS] = "aggressive"};
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#endif
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module_param_array(pardev, charp, NULL, 0);
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MODULE_PARM_DESC(pardev, "pardev: where to search for\n\
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\teach camera. 'aggressive' means brute-force search.\n\
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\tEg: >pardev=parport3,aggressive,parport2,parport1< would assign\n\
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\tcam 1 to parport3 and search every parport for cam 2 etc...");
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static int parmode = 0;
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module_param(parmode, int, 0);
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MODULE_PARM_DESC(parmode, "parmode: transfer mode (0=auto, 1=ecp, 2=epp");
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static int video_nr = -1;
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module_param(video_nr, int, 0);
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/*
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* Private data
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*/
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static struct w9966_dev w9966_cams[W9966_MAXCAMS];
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/*
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* Private function declares
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*/
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static inline void w9966_setState(struct w9966_dev* cam, int mask, int val);
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static inline int w9966_getState(struct w9966_dev* cam, int mask, int val);
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static inline void w9966_pdev_claim(struct w9966_dev *vdev);
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static inline void w9966_pdev_release(struct w9966_dev *vdev);
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static int w9966_rReg(struct w9966_dev* cam, int reg);
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static int w9966_wReg(struct w9966_dev* cam, int reg, int data);
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#if 0
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static int w9966_rReg_i2c(struct w9966_dev* cam, int reg);
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#endif
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static int w9966_wReg_i2c(struct w9966_dev* cam, int reg, int data);
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static int w9966_findlen(int near, int size, int maxlen);
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static int w9966_calcscale(int size, int min, int max, int* beg, int* end, unsigned char* factor);
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static int w9966_setup(struct w9966_dev* cam, int x1, int y1, int x2, int y2, int w, int h);
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static int w9966_init(struct w9966_dev* cam, struct parport* port);
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static void w9966_term(struct w9966_dev* cam);
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static inline void w9966_i2c_setsda(struct w9966_dev* cam, int state);
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static inline int w9966_i2c_setscl(struct w9966_dev* cam, int state);
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static inline int w9966_i2c_getsda(struct w9966_dev* cam);
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static inline int w9966_i2c_getscl(struct w9966_dev* cam);
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static int w9966_i2c_wbyte(struct w9966_dev* cam, int data);
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#if 0
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static int w9966_i2c_rbyte(struct w9966_dev* cam);
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#endif
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static int w9966_v4l_ioctl(struct inode *inode, struct file *file,
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unsigned int cmd, unsigned long arg);
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static ssize_t w9966_v4l_read(struct file *file, char __user *buf,
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size_t count, loff_t *ppos);
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static struct file_operations w9966_fops = {
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.owner = THIS_MODULE,
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.open = video_exclusive_open,
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.release = video_exclusive_release,
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.ioctl = w9966_v4l_ioctl,
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.compat_ioctl = v4l_compat_ioctl32,
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.read = w9966_v4l_read,
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.llseek = no_llseek,
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};
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static struct video_device w9966_template = {
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.owner = THIS_MODULE,
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.name = W9966_DRIVERNAME,
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.type = VID_TYPE_CAPTURE | VID_TYPE_SCALES,
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.hardware = VID_HARDWARE_W9966,
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.fops = &w9966_fops,
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};
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/*
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* Private function defines
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*/
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// Set camera phase flags, so we know what to uninit when terminating
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static inline void w9966_setState(struct w9966_dev* cam, int mask, int val)
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{
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cam->dev_state = (cam->dev_state & ~mask) ^ val;
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}
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// Get camera phase flags
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static inline int w9966_getState(struct w9966_dev* cam, int mask, int val)
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{
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return ((cam->dev_state & mask) == val);
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}
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// Claim parport for ourself
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static inline void w9966_pdev_claim(struct w9966_dev* cam)
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{
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if (w9966_getState(cam, W9966_STATE_CLAIMED, W9966_STATE_CLAIMED))
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return;
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parport_claim_or_block(cam->pdev);
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w9966_setState(cam, W9966_STATE_CLAIMED, W9966_STATE_CLAIMED);
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}
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// Release parport for others to use
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static inline void w9966_pdev_release(struct w9966_dev* cam)
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{
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if (w9966_getState(cam, W9966_STATE_CLAIMED, 0))
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return;
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parport_release(cam->pdev);
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w9966_setState(cam, W9966_STATE_CLAIMED, 0);
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}
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// Read register from W9966 interface-chip
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// Expects a claimed pdev
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// -1 on error, else register data (byte)
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static int w9966_rReg(struct w9966_dev* cam, int reg)
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{
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// ECP, read, regtransfer, REG, REG, REG, REG, REG
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const unsigned char addr = 0x80 | (reg & 0x1f);
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unsigned char val;
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if (parport_negotiate(cam->pport, cam->ppmode | IEEE1284_ADDR) != 0)
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return -1;
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if (parport_write(cam->pport, &addr, 1) != 1)
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return -1;
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if (parport_negotiate(cam->pport, cam->ppmode | IEEE1284_DATA) != 0)
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return -1;
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if (parport_read(cam->pport, &val, 1) != 1)
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return -1;
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return val;
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}
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// Write register to W9966 interface-chip
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// Expects a claimed pdev
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// -1 on error
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static int w9966_wReg(struct w9966_dev* cam, int reg, int data)
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{
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// ECP, write, regtransfer, REG, REG, REG, REG, REG
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const unsigned char addr = 0xc0 | (reg & 0x1f);
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const unsigned char val = data;
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if (parport_negotiate(cam->pport, cam->ppmode | IEEE1284_ADDR) != 0)
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return -1;
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if (parport_write(cam->pport, &addr, 1) != 1)
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return -1;
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if (parport_negotiate(cam->pport, cam->ppmode | IEEE1284_DATA) != 0)
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return -1;
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if (parport_write(cam->pport, &val, 1) != 1)
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return -1;
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return 0;
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}
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// Initialize camera device. Setup all internal flags, set a
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// default video mode, setup ccd-chip, register v4l device etc..
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// Also used for 'probing' of hardware.
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// -1 on error
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static int w9966_init(struct w9966_dev* cam, struct parport* port)
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{
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if (cam->dev_state != 0)
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return -1;
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cam->pport = port;
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cam->brightness = 128;
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cam->contrast = 64;
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cam->color = 64;
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cam->hue = 0;
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// Select requested transfer mode
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switch(parmode)
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{
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default: // Auto-detect (priority: hw-ecp, hw-epp, sw-ecp)
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case 0:
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if (port->modes & PARPORT_MODE_ECP)
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cam->ppmode = IEEE1284_MODE_ECP;
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else if (port->modes & PARPORT_MODE_EPP)
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cam->ppmode = IEEE1284_MODE_EPP;
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else
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cam->ppmode = IEEE1284_MODE_ECP;
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break;
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case 1: // hw- or sw-ecp
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cam->ppmode = IEEE1284_MODE_ECP;
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break;
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case 2: // hw- or sw-epp
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cam->ppmode = IEEE1284_MODE_EPP;
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break;
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}
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// Tell the parport driver that we exists
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cam->pdev = parport_register_device(port, "w9966", NULL, NULL, NULL, 0, NULL);
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if (cam->pdev == NULL) {
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DPRINTF("parport_register_device() failed\n");
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return -1;
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}
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w9966_setState(cam, W9966_STATE_PDEV, W9966_STATE_PDEV);
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w9966_pdev_claim(cam);
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// Setup a default capture mode
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if (w9966_setup(cam, 0, 0, 1023, 1023, 200, 160) != 0) {
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DPRINTF("w9966_setup() failed.\n");
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return -1;
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}
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w9966_pdev_release(cam);
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// Fill in the video_device struct and register us to v4l
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memcpy(&cam->vdev, &w9966_template, sizeof(struct video_device));
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cam->vdev.priv = cam;
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if (video_register_device(&cam->vdev, VFL_TYPE_GRABBER, video_nr) == -1)
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return -1;
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w9966_setState(cam, W9966_STATE_VDEV, W9966_STATE_VDEV);
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// All ok
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printk(
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"w9966cf: Found and initialized a webcam on %s.\n",
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cam->pport->name
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);
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return 0;
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}
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// Terminate everything gracefully
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static void w9966_term(struct w9966_dev* cam)
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{
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// Unregister from v4l
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if (w9966_getState(cam, W9966_STATE_VDEV, W9966_STATE_VDEV)) {
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video_unregister_device(&cam->vdev);
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w9966_setState(cam, W9966_STATE_VDEV, 0);
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}
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// Terminate from IEEE1284 mode and release pdev block
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if (w9966_getState(cam, W9966_STATE_PDEV, W9966_STATE_PDEV)) {
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w9966_pdev_claim(cam);
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parport_negotiate(cam->pport, IEEE1284_MODE_COMPAT);
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w9966_pdev_release(cam);
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}
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// Unregister from parport
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if (w9966_getState(cam, W9966_STATE_PDEV, W9966_STATE_PDEV)) {
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parport_unregister_device(cam->pdev);
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w9966_setState(cam, W9966_STATE_PDEV, 0);
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}
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}
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// Find a good length for capture window (used both for W and H)
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// A bit ugly but pretty functional. The capture length
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// have to match the downscale
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static int w9966_findlen(int near, int size, int maxlen)
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{
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int bestlen = size;
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int besterr = abs(near - bestlen);
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int len;
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for(len = size+1;len < maxlen;len++)
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{
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int err;
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if ( ((64*size) %len) != 0)
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continue;
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err = abs(near - len);
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// Only continue as long as we keep getting better values
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if (err > besterr)
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break;
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besterr = err;
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bestlen = len;
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}
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return bestlen;
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}
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// Modify capture window (if necessary)
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// and calculate downscaling
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// Return -1 on error
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static int w9966_calcscale(int size, int min, int max, int* beg, int* end, unsigned char* factor)
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{
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int maxlen = max - min;
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int len = *end - *beg + 1;
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int newlen = w9966_findlen(len, size, maxlen);
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int err = newlen - len;
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// Check for bad format
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if (newlen > maxlen || newlen < size)
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return -1;
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// Set factor (6 bit fixed)
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*factor = (64*size) / newlen;
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if (*factor == 64)
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*factor = 0x00; // downscale is disabled
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else
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*factor |= 0x80; // set downscale-enable bit
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// Modify old beginning and end
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*beg -= err / 2;
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*end += err - (err / 2);
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// Move window if outside borders
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if (*beg < min) {
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*end += min - *beg;
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*beg += min - *beg;
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}
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if (*end > max) {
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*beg -= *end - max;
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*end -= *end - max;
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}
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return 0;
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}
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// Setup the cameras capture window etc.
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// Expects a claimed pdev
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// return -1 on error
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static int w9966_setup(struct w9966_dev* cam, int x1, int y1, int x2, int y2, int w, int h)
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{
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unsigned int i;
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unsigned int enh_s, enh_e;
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unsigned char scale_x, scale_y;
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unsigned char regs[0x1c];
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unsigned char saa7111_regs[] = {
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0x21, 0x00, 0xd8, 0x23, 0x00, 0x80, 0x80, 0x00,
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0x88, 0x10, 0x80, 0x40, 0x40, 0x00, 0x01, 0x00,
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0x48, 0x0c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x71, 0xe7, 0x00, 0x00, 0xc0
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};
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if (w*h*2 > W9966_SRAMSIZE)
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{
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DPRINTF("capture window exceeds SRAM size!.\n");
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w = 200; h = 160; // Pick default values
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}
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w &= ~0x1;
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if (w < 2) w = 2;
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if (h < 1) h = 1;
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if (w > W9966_WND_MAX_W) w = W9966_WND_MAX_W;
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if (h > W9966_WND_MAX_H) h = W9966_WND_MAX_H;
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cam->width = w;
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cam->height = h;
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enh_s = 0;
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enh_e = w*h*2;
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// Modify capture window if necessary and calculate downscaling
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if (
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w9966_calcscale(w, W9966_WND_MIN_X, W9966_WND_MAX_X, &x1, &x2, &scale_x) != 0 ||
|
|
w9966_calcscale(h, W9966_WND_MIN_Y, W9966_WND_MAX_Y, &y1, &y2, &scale_y) != 0
|
|
) return -1;
|
|
|
|
DPRINTF(
|
|
"%dx%d, x: %d<->%d, y: %d<->%d, sx: %d/64, sy: %d/64.\n",
|
|
w, h, x1, x2, y1, y2, scale_x&~0x80, scale_y&~0x80
|
|
);
|
|
|
|
// Setup registers
|
|
regs[0x00] = 0x00; // Set normal operation
|
|
regs[0x01] = 0x18; // Capture mode
|
|
regs[0x02] = scale_y; // V-scaling
|
|
regs[0x03] = scale_x; // H-scaling
|
|
|
|
// Capture window
|
|
regs[0x04] = (x1 & 0x0ff); // X-start (8 low bits)
|
|
regs[0x05] = (x1 & 0x300)>>8; // X-start (2 high bits)
|
|
regs[0x06] = (y1 & 0x0ff); // Y-start (8 low bits)
|
|
regs[0x07] = (y1 & 0x300)>>8; // Y-start (2 high bits)
|
|
regs[0x08] = (x2 & 0x0ff); // X-end (8 low bits)
|
|
regs[0x09] = (x2 & 0x300)>>8; // X-end (2 high bits)
|
|
regs[0x0a] = (y2 & 0x0ff); // Y-end (8 low bits)
|
|
|
|
regs[0x0c] = W9966_SRAMID; // SRAM-banks (1x 128kb)
|
|
|
|
// Enhancement layer
|
|
regs[0x0d] = (enh_s& 0x000ff); // Enh. start (0-7)
|
|
regs[0x0e] = (enh_s& 0x0ff00)>>8; // Enh. start (8-15)
|
|
regs[0x0f] = (enh_s& 0x70000)>>16; // Enh. start (16-17/18??)
|
|
regs[0x10] = (enh_e& 0x000ff); // Enh. end (0-7)
|
|
regs[0x11] = (enh_e& 0x0ff00)>>8; // Enh. end (8-15)
|
|
regs[0x12] = (enh_e& 0x70000)>>16; // Enh. end (16-17/18??)
|
|
|
|
// Misc
|
|
regs[0x13] = 0x40; // VEE control (raw 4:2:2)
|
|
regs[0x17] = 0x00; // ???
|
|
regs[0x18] = cam->i2c_state = 0x00; // Serial bus
|
|
regs[0x19] = 0xff; // I/O port direction control
|
|
regs[0x1a] = 0xff; // I/O port data register
|
|
regs[0x1b] = 0x10; // ???
|
|
|
|
// SAA7111 chip settings
|
|
saa7111_regs[0x0a] = cam->brightness;
|
|
saa7111_regs[0x0b] = cam->contrast;
|
|
saa7111_regs[0x0c] = cam->color;
|
|
saa7111_regs[0x0d] = cam->hue;
|
|
|
|
// Reset (ECP-fifo & serial-bus)
|
|
if (w9966_wReg(cam, 0x00, 0x03) == -1)
|
|
return -1;
|
|
|
|
// Write regs to w9966cf chip
|
|
for (i = 0; i < 0x1c; i++)
|
|
if (w9966_wReg(cam, i, regs[i]) == -1)
|
|
return -1;
|
|
|
|
// Write regs to saa7111 chip
|
|
for (i = 0; i < 0x20; i++)
|
|
if (w9966_wReg_i2c(cam, i, saa7111_regs[i]) == -1)
|
|
return -1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Ugly and primitive i2c protocol functions
|
|
*/
|
|
|
|
// Sets the data line on the i2c bus.
|
|
// Expects a claimed pdev.
|
|
static inline void w9966_i2c_setsda(struct w9966_dev* cam, int state)
|
|
{
|
|
if (state)
|
|
cam->i2c_state |= W9966_I2C_W_DATA;
|
|
else
|
|
cam->i2c_state &= ~W9966_I2C_W_DATA;
|
|
|
|
w9966_wReg(cam, 0x18, cam->i2c_state);
|
|
udelay(5);
|
|
}
|
|
|
|
// Get peripheral clock line
|
|
// Expects a claimed pdev.
|
|
static inline int w9966_i2c_getscl(struct w9966_dev* cam)
|
|
{
|
|
const unsigned char state = w9966_rReg(cam, 0x18);
|
|
return ((state & W9966_I2C_R_CLOCK) > 0);
|
|
}
|
|
|
|
// Sets the clock line on the i2c bus.
|
|
// Expects a claimed pdev. -1 on error
|
|
static inline int w9966_i2c_setscl(struct w9966_dev* cam, int state)
|
|
{
|
|
unsigned long timeout;
|
|
|
|
if (state)
|
|
cam->i2c_state |= W9966_I2C_W_CLOCK;
|
|
else
|
|
cam->i2c_state &= ~W9966_I2C_W_CLOCK;
|
|
|
|
w9966_wReg(cam, 0x18, cam->i2c_state);
|
|
udelay(5);
|
|
|
|
// we go to high, we also expect the peripheral to ack.
|
|
if (state) {
|
|
timeout = jiffies + 100;
|
|
while (!w9966_i2c_getscl(cam)) {
|
|
if (time_after(jiffies, timeout))
|
|
return -1;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
// Get peripheral data line
|
|
// Expects a claimed pdev.
|
|
static inline int w9966_i2c_getsda(struct w9966_dev* cam)
|
|
{
|
|
const unsigned char state = w9966_rReg(cam, 0x18);
|
|
return ((state & W9966_I2C_R_DATA) > 0);
|
|
}
|
|
|
|
// Write a byte with ack to the i2c bus.
|
|
// Expects a claimed pdev. -1 on error
|
|
static int w9966_i2c_wbyte(struct w9966_dev* cam, int data)
|
|
{
|
|
int i;
|
|
for (i = 7; i >= 0; i--)
|
|
{
|
|
w9966_i2c_setsda(cam, (data >> i) & 0x01);
|
|
|
|
if (w9966_i2c_setscl(cam, 1) == -1)
|
|
return -1;
|
|
w9966_i2c_setscl(cam, 0);
|
|
}
|
|
|
|
w9966_i2c_setsda(cam, 1);
|
|
|
|
if (w9966_i2c_setscl(cam, 1) == -1)
|
|
return -1;
|
|
w9966_i2c_setscl(cam, 0);
|
|
|
|
return 0;
|
|
}
|
|
|
|
// Read a data byte with ack from the i2c-bus
|
|
// Expects a claimed pdev. -1 on error
|
|
#if 0
|
|
static int w9966_i2c_rbyte(struct w9966_dev* cam)
|
|
{
|
|
unsigned char data = 0x00;
|
|
int i;
|
|
|
|
w9966_i2c_setsda(cam, 1);
|
|
|
|
for (i = 0; i < 8; i++)
|
|
{
|
|
if (w9966_i2c_setscl(cam, 1) == -1)
|
|
return -1;
|
|
data = data << 1;
|
|
if (w9966_i2c_getsda(cam))
|
|
data |= 0x01;
|
|
|
|
w9966_i2c_setscl(cam, 0);
|
|
}
|
|
return data;
|
|
}
|
|
#endif
|
|
|
|
// Read a register from the i2c device.
|
|
// Expects claimed pdev. -1 on error
|
|
#if 0
|
|
static int w9966_rReg_i2c(struct w9966_dev* cam, int reg)
|
|
{
|
|
int data;
|
|
|
|
w9966_i2c_setsda(cam, 0);
|
|
w9966_i2c_setscl(cam, 0);
|
|
|
|
if (
|
|
w9966_i2c_wbyte(cam, W9966_I2C_W_ID) == -1 ||
|
|
w9966_i2c_wbyte(cam, reg) == -1
|
|
)
|
|
return -1;
|
|
|
|
w9966_i2c_setsda(cam, 1);
|
|
if (w9966_i2c_setscl(cam, 1) == -1)
|
|
return -1;
|
|
w9966_i2c_setsda(cam, 0);
|
|
w9966_i2c_setscl(cam, 0);
|
|
|
|
if (
|
|
w9966_i2c_wbyte(cam, W9966_I2C_R_ID) == -1 ||
|
|
(data = w9966_i2c_rbyte(cam)) == -1
|
|
)
|
|
return -1;
|
|
|
|
w9966_i2c_setsda(cam, 0);
|
|
|
|
if (w9966_i2c_setscl(cam, 1) == -1)
|
|
return -1;
|
|
w9966_i2c_setsda(cam, 1);
|
|
|
|
return data;
|
|
}
|
|
#endif
|
|
|
|
// Write a register to the i2c device.
|
|
// Expects claimed pdev. -1 on error
|
|
static int w9966_wReg_i2c(struct w9966_dev* cam, int reg, int data)
|
|
{
|
|
w9966_i2c_setsda(cam, 0);
|
|
w9966_i2c_setscl(cam, 0);
|
|
|
|
if (
|
|
w9966_i2c_wbyte(cam, W9966_I2C_W_ID) == -1 ||
|
|
w9966_i2c_wbyte(cam, reg) == -1 ||
|
|
w9966_i2c_wbyte(cam, data) == -1
|
|
)
|
|
return -1;
|
|
|
|
w9966_i2c_setsda(cam, 0);
|
|
if (w9966_i2c_setscl(cam, 1) == -1)
|
|
return -1;
|
|
|
|
w9966_i2c_setsda(cam, 1);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Video4linux interfacing
|
|
*/
|
|
|
|
static int w9966_v4l_do_ioctl(struct inode *inode, struct file *file,
|
|
unsigned int cmd, void *arg)
|
|
{
|
|
struct video_device *vdev = video_devdata(file);
|
|
struct w9966_dev *cam = vdev->priv;
|
|
|
|
switch(cmd)
|
|
{
|
|
case VIDIOCGCAP:
|
|
{
|
|
static struct video_capability vcap = {
|
|
.name = W9966_DRIVERNAME,
|
|
.type = VID_TYPE_CAPTURE | VID_TYPE_SCALES,
|
|
.channels = 1,
|
|
.maxwidth = W9966_WND_MAX_W,
|
|
.maxheight = W9966_WND_MAX_H,
|
|
.minwidth = 2,
|
|
.minheight = 1,
|
|
};
|
|
struct video_capability *cap = arg;
|
|
*cap = vcap;
|
|
return 0;
|
|
}
|
|
case VIDIOCGCHAN:
|
|
{
|
|
struct video_channel *vch = arg;
|
|
if(vch->channel != 0) // We only support one channel (#0)
|
|
return -EINVAL;
|
|
memset(vch,0,sizeof(*vch));
|
|
strcpy(vch->name, "CCD-input");
|
|
vch->type = VIDEO_TYPE_CAMERA;
|
|
return 0;
|
|
}
|
|
case VIDIOCSCHAN:
|
|
{
|
|
struct video_channel *vch = arg;
|
|
if(vch->channel != 0)
|
|
return -EINVAL;
|
|
return 0;
|
|
}
|
|
case VIDIOCGTUNER:
|
|
{
|
|
struct video_tuner *vtune = arg;
|
|
if(vtune->tuner != 0)
|
|
return -EINVAL;
|
|
strcpy(vtune->name, "no tuner");
|
|
vtune->rangelow = 0;
|
|
vtune->rangehigh = 0;
|
|
vtune->flags = VIDEO_TUNER_NORM;
|
|
vtune->mode = VIDEO_MODE_AUTO;
|
|
vtune->signal = 0xffff;
|
|
return 0;
|
|
}
|
|
case VIDIOCSTUNER:
|
|
{
|
|
struct video_tuner *vtune = arg;
|
|
if (vtune->tuner != 0)
|
|
return -EINVAL;
|
|
if (vtune->mode != VIDEO_MODE_AUTO)
|
|
return -EINVAL;
|
|
return 0;
|
|
}
|
|
case VIDIOCGPICT:
|
|
{
|
|
struct video_picture vpic = {
|
|
cam->brightness << 8, // brightness
|
|
(cam->hue + 128) << 8, // hue
|
|
cam->color << 9, // color
|
|
cam->contrast << 9, // contrast
|
|
0x8000, // whiteness
|
|
16, VIDEO_PALETTE_YUV422// bpp, palette format
|
|
};
|
|
struct video_picture *pic = arg;
|
|
*pic = vpic;
|
|
return 0;
|
|
}
|
|
case VIDIOCSPICT:
|
|
{
|
|
struct video_picture *vpic = arg;
|
|
if (vpic->depth != 16 || (vpic->palette != VIDEO_PALETTE_YUV422 && vpic->palette != VIDEO_PALETTE_YUYV))
|
|
return -EINVAL;
|
|
|
|
cam->brightness = vpic->brightness >> 8;
|
|
cam->hue = (vpic->hue >> 8) - 128;
|
|
cam->color = vpic->colour >> 9;
|
|
cam->contrast = vpic->contrast >> 9;
|
|
|
|
w9966_pdev_claim(cam);
|
|
|
|
if (
|
|
w9966_wReg_i2c(cam, 0x0a, cam->brightness) == -1 ||
|
|
w9966_wReg_i2c(cam, 0x0b, cam->contrast) == -1 ||
|
|
w9966_wReg_i2c(cam, 0x0c, cam->color) == -1 ||
|
|
w9966_wReg_i2c(cam, 0x0d, cam->hue) == -1
|
|
) {
|
|
w9966_pdev_release(cam);
|
|
return -EIO;
|
|
}
|
|
|
|
w9966_pdev_release(cam);
|
|
return 0;
|
|
}
|
|
case VIDIOCSWIN:
|
|
{
|
|
int ret;
|
|
struct video_window *vwin = arg;
|
|
|
|
if (vwin->flags != 0)
|
|
return -EINVAL;
|
|
if (vwin->clipcount != 0)
|
|
return -EINVAL;
|
|
if (vwin->width < 2 || vwin->width > W9966_WND_MAX_W)
|
|
return -EINVAL;
|
|
if (vwin->height < 1 || vwin->height > W9966_WND_MAX_H)
|
|
return -EINVAL;
|
|
|
|
// Update camera regs
|
|
w9966_pdev_claim(cam);
|
|
ret = w9966_setup(cam, 0, 0, 1023, 1023, vwin->width, vwin->height);
|
|
w9966_pdev_release(cam);
|
|
|
|
if (ret != 0) {
|
|
DPRINTF("VIDIOCSWIN: w9966_setup() failed.\n");
|
|
return -EIO;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
case VIDIOCGWIN:
|
|
{
|
|
struct video_window *vwin = arg;
|
|
memset(vwin, 0, sizeof(*vwin));
|
|
vwin->width = cam->width;
|
|
vwin->height = cam->height;
|
|
return 0;
|
|
}
|
|
// Unimplemented
|
|
case VIDIOCCAPTURE:
|
|
case VIDIOCGFBUF:
|
|
case VIDIOCSFBUF:
|
|
case VIDIOCKEY:
|
|
case VIDIOCGFREQ:
|
|
case VIDIOCSFREQ:
|
|
case VIDIOCGAUDIO:
|
|
case VIDIOCSAUDIO:
|
|
return -EINVAL;
|
|
default:
|
|
return -ENOIOCTLCMD;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int w9966_v4l_ioctl(struct inode *inode, struct file *file,
|
|
unsigned int cmd, unsigned long arg)
|
|
{
|
|
return video_usercopy(inode, file, cmd, arg, w9966_v4l_do_ioctl);
|
|
}
|
|
|
|
// Capture data
|
|
static ssize_t w9966_v4l_read(struct file *file, char __user *buf,
|
|
size_t count, loff_t *ppos)
|
|
{
|
|
struct video_device *vdev = video_devdata(file);
|
|
struct w9966_dev *cam = vdev->priv;
|
|
unsigned char addr = 0xa0; // ECP, read, CCD-transfer, 00000
|
|
unsigned char __user *dest = (unsigned char __user *)buf;
|
|
unsigned long dleft = count;
|
|
unsigned char *tbuf;
|
|
|
|
// Why would anyone want more than this??
|
|
if (count > cam->width * cam->height * 2)
|
|
return -EINVAL;
|
|
|
|
w9966_pdev_claim(cam);
|
|
w9966_wReg(cam, 0x00, 0x02); // Reset ECP-FIFO buffer
|
|
w9966_wReg(cam, 0x00, 0x00); // Return to normal operation
|
|
w9966_wReg(cam, 0x01, 0x98); // Enable capture
|
|
|
|
// write special capture-addr and negotiate into data transfer
|
|
if (
|
|
(parport_negotiate(cam->pport, cam->ppmode|IEEE1284_ADDR) != 0 )||
|
|
(parport_write(cam->pport, &addr, 1) != 1 )||
|
|
(parport_negotiate(cam->pport, cam->ppmode|IEEE1284_DATA) != 0 )
|
|
) {
|
|
w9966_pdev_release(cam);
|
|
return -EFAULT;
|
|
}
|
|
|
|
tbuf = kmalloc(W9966_RBUFFER, GFP_KERNEL);
|
|
if (tbuf == NULL) {
|
|
count = -ENOMEM;
|
|
goto out;
|
|
}
|
|
|
|
while(dleft > 0)
|
|
{
|
|
unsigned long tsize = (dleft > W9966_RBUFFER) ? W9966_RBUFFER : dleft;
|
|
|
|
if (parport_read(cam->pport, tbuf, tsize) < tsize) {
|
|
count = -EFAULT;
|
|
goto out;
|
|
}
|
|
if (copy_to_user(dest, tbuf, tsize) != 0) {
|
|
count = -EFAULT;
|
|
goto out;
|
|
}
|
|
dest += tsize;
|
|
dleft -= tsize;
|
|
}
|
|
|
|
w9966_wReg(cam, 0x01, 0x18); // Disable capture
|
|
|
|
out:
|
|
kfree(tbuf);
|
|
w9966_pdev_release(cam);
|
|
|
|
return count;
|
|
}
|
|
|
|
|
|
// Called once for every parport on init
|
|
static void w9966_attach(struct parport *port)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < W9966_MAXCAMS; i++)
|
|
{
|
|
if (w9966_cams[i].dev_state != 0) // Cam is already assigned
|
|
continue;
|
|
if (
|
|
strcmp(pardev[i], "aggressive") == 0 ||
|
|
strcmp(pardev[i], port->name) == 0
|
|
) {
|
|
if (w9966_init(&w9966_cams[i], port) != 0)
|
|
w9966_term(&w9966_cams[i]);
|
|
break; // return
|
|
}
|
|
}
|
|
}
|
|
|
|
// Called once for every parport on termination
|
|
static void w9966_detach(struct parport *port)
|
|
{
|
|
int i;
|
|
for (i = 0; i < W9966_MAXCAMS; i++)
|
|
if (w9966_cams[i].dev_state != 0 && w9966_cams[i].pport == port)
|
|
w9966_term(&w9966_cams[i]);
|
|
}
|
|
|
|
|
|
static struct parport_driver w9966_ppd = {
|
|
.name = W9966_DRIVERNAME,
|
|
.attach = w9966_attach,
|
|
.detach = w9966_detach,
|
|
};
|
|
|
|
// Module entry point
|
|
static int __init w9966_mod_init(void)
|
|
{
|
|
int i;
|
|
for (i = 0; i < W9966_MAXCAMS; i++)
|
|
w9966_cams[i].dev_state = 0;
|
|
|
|
return parport_register_driver(&w9966_ppd);
|
|
}
|
|
|
|
// Module cleanup
|
|
static void __exit w9966_mod_term(void)
|
|
{
|
|
parport_unregister_driver(&w9966_ppd);
|
|
}
|
|
|
|
module_init(w9966_mod_init);
|
|
module_exit(w9966_mod_term);
|