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Version 0.32 Copyright (C) 2001 Jakob Kemi <jakob.kemi@post.utfors.se> 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., 675 Mass Ave, Cambridge, MA 02139, USA. */ /* Supported devices: *Lifeview FlyCam Supra (using the Philips saa7111a chip) Does any other model using the w9966 interface chip exist ? Todo: *Add a working EPP mode, since DMA ECP read isn't implemented in the parport drivers. (That's why it's so sloow) *Add support for other ccd-control chips than the saa7111 please send me feedback on what kind of chips you have. *Add proper probing. I don't know what's wrong with the IEEE1284 parport drivers but (IEEE1284_MODE_NIBBLE|IEEE1284_DEVICE_ID) and nibble read seems to be broken for some peripherals. *Add probing for onboard SRAM, port directions etc. (if possible) *Add support for the hardware compressed modes (maybe using v4l2) *Fix better support for the capture window (no skewed images, v4l interface to capt. window) *Probably some bugs that I don't know of Please support me by sending feedback! Changes: Alan Cox: Removed RGB mode for kernel merge, added THIS_MODULE and owner support for newer module locks */ #include <linux/module.h> #include <linux/init.h> #include <linux/delay.h> #include <linux/videodev.h> #include <linux/parport.h> //#define DEBUG // Undef me for production #ifdef DEBUG #define DPRINTF(x, a...) printk(KERN_DEBUG "W9966: "__FUNCTION__ "(): "x, ##a) #else #define DPRINTF(x...) #endif /* * Defines, simple typedefs etc. */ #define W9966_DRIVERNAME "W9966CF Webcam" #define W9966_MAXCAMS 4 // Maximum number of cameras #define W9966_RBUFFER 2048 // Read buffer (must be an even number) #define W9966_SRAMSIZE 131072 // 128kb #define W9966_SRAMID 0x02 // check w9966cf.pdf // Empirically determined window limits #define W9966_WND_MIN_X 16 #define W9966_WND_MIN_Y 14 #define W9966_WND_MAX_X 705 #define W9966_WND_MAX_Y 253 #define W9966_WND_MAX_W (W9966_WND_MAX_X - W9966_WND_MIN_X) #define W9966_WND_MAX_H (W9966_WND_MAX_Y - W9966_WND_MIN_Y) // Keep track of our current state #define W9966_STATE_PDEV 0x01 #define W9966_STATE_CLAIMED 0x02 #define W9966_STATE_VDEV 0x04 #define W9966_I2C_W_ID 0x48 #define W9966_I2C_R_ID 0x49 #define W9966_I2C_R_DATA 0x08 #define W9966_I2C_R_CLOCK 0x04 #define W9966_I2C_W_DATA 0x02 #define W9966_I2C_W_CLOCK 0x01 struct w9966_dev { unsigned char dev_state; unsigned char i2c_state; unsigned short ppmode; struct parport* pport; struct pardevice* pdev; struct video_device vdev; unsigned short width; unsigned short height; unsigned char brightness; signed char contrast; signed char color; signed char hue; }; /* * Module specific properties */ MODULE_AUTHOR("Jakob Kemi <jakob.kemi@post.utfors.se>"); MODULE_DESCRIPTION("Winbond w9966cf WebCam driver (0.32)"); #ifdef MODULE static const char* pardev[] = {[0 ... W9966_MAXCAMS] = ""}; #else static const char* pardev[] = {[0 ... W9966_MAXCAMS] = "aggressive"}; #endif MODULE_PARM(pardev, "1-" __MODULE_STRING(W9966_MAXCAMS) "s"); MODULE_PARM_DESC(pardev, "pardev: where to search for\n\ \teach camera. 'aggressive' means brute-force search.\n\ \tEg: >pardev=parport3,aggressive,parport2,parport1< would assign \tcam 1 to parport3 and search every parport for cam 2 etc..."); static int parmode = 0; MODULE_PARM(parmode, "i"); MODULE_PARM_DESC(parmode, "parmode: transfer mode (0=auto, 1=ecp, 2=epp"); static int video_nr = -1; MODULE_PARM(video_nr, "i"); /* * Private data */ static struct w9966_dev w9966_cams[W9966_MAXCAMS]; /* * Private function declares */ static inline void w9966_setState(struct w9966_dev* cam, int mask, int val); static inline int w9966_getState(struct w9966_dev* cam, int mask, int val); static inline void w9966_pdev_claim(struct w9966_dev *vdev); static inline void w9966_pdev_release(struct w9966_dev *vdev); static int w9966_rReg(struct w9966_dev* cam, int reg); static int w9966_wReg(struct w9966_dev* cam, int reg, int data); static int w9966_rReg_i2c(struct w9966_dev* cam, int reg); static int w9966_wReg_i2c(struct w9966_dev* cam, int reg, int data); static int w9966_findlen(int near, int size, int maxlen); static int w9966_calcscale(int size, int min, int max, int* beg, int* end, unsigned char* factor); static int w9966_setup(struct w9966_dev* cam, int x1, int y1, int x2, int y2, int w, int h); static int w9966_init(struct w9966_dev* cam, struct parport* port); static void w9966_term(struct w9966_dev* cam); static inline void w9966_i2c_setsda(struct w9966_dev* cam, int state); static inline int w9966_i2c_setscl(struct w9966_dev* cam, int state); static inline int w9966_i2c_getsda(struct w9966_dev* cam); static inline int w9966_i2c_getscl(struct w9966_dev* cam); static int w9966_i2c_wbyte(struct w9966_dev* cam, int data); static int w9966_i2c_rbyte(struct w9966_dev* cam); static int w9966_v4l_open(struct video_device *vdev, int mode); static void w9966_v4l_close(struct video_device *vdev); static int w9966_v4l_ioctl(struct video_device *vdev, unsigned int cmd, void *arg); static long w9966_v4l_read(struct video_device *vdev, char *buf, unsigned long count, int noblock); /* * Private function defines */ // Set camera phase flags, so we know what to uninit when terminating static inline void w9966_setState(struct w9966_dev* cam, int mask, int val) { cam->dev_state = (cam->dev_state & ~mask) ^ val; } // Get camera phase flags static inline int w9966_getState(struct w9966_dev* cam, int mask, int val) { return ((cam->dev_state & mask) == val); } // Claim parport for ourself static inline void w9966_pdev_claim(struct w9966_dev* cam) { if (w9966_getState(cam, W9966_STATE_CLAIMED, W9966_STATE_CLAIMED)) return; parport_claim_or_block(cam->pdev); w9966_setState(cam, W9966_STATE_CLAIMED, W9966_STATE_CLAIMED); } // Release parport for others to use static inline void w9966_pdev_release(struct w9966_dev* cam) { if (w9966_getState(cam, W9966_STATE_CLAIMED, 0)) return; parport_release(cam->pdev); w9966_setState(cam, W9966_STATE_CLAIMED, 0); } // Read register from W9966 interface-chip // Expects a claimed pdev // -1 on error, else register data (byte) static int w9966_rReg(struct w9966_dev* cam, int reg) { // ECP, read, regtransfer, REG, REG, REG, REG, REG const unsigned char addr = 0x80 | (reg & 0x1f); unsigned char val; if (parport_negotiate(cam->pport, cam->ppmode | IEEE1284_ADDR) != 0) return -1; if (parport_write(cam->pport, &addr, 1) != 1) return -1; if (parport_negotiate(cam->pport, cam->ppmode | IEEE1284_DATA) != 0) return -1; if (parport_read(cam->pport, &val, 1) != 1) return -1; return val; } // Write register to W9966 interface-chip // Expects a claimed pdev // -1 on error static int w9966_wReg(struct w9966_dev* cam, int reg, int data) { // ECP, write, regtransfer, REG, REG, REG, REG, REG const unsigned char addr = 0xc0 | (reg & 0x1f); const unsigned char val = data; if (parport_negotiate(cam->pport, cam->ppmode | IEEE1284_ADDR) != 0) return -1; if (parport_write(cam->pport, &addr, 1) != 1) return -1; if (parport_negotiate(cam->pport, cam->ppmode | IEEE1284_DATA) != 0) return -1; if (parport_write(cam->pport, &val, 1) != 1) return -1; return 0; } // Initialize camera device. Setup all internal flags, set a // default video mode, setup ccd-chip, register v4l device etc.. // Also used for 'probing' of hardware. // -1 on error static int w9966_init(struct w9966_dev* cam, struct parport* port) { if (cam->dev_state != 0) return -1; cam->pport = port; cam->brightness = 128; cam->contrast = 64; cam->color = 64; cam->hue = 0; // Select requested transfer mode switch(parmode) { default: // Auto-detect (priority: hw-ecp, hw-epp, sw-ecp) case 0: if (port->modes & PARPORT_MODE_ECP) cam->ppmode = IEEE1284_MODE_ECP; else if (port->modes & PARPORT_MODE_EPP) cam->ppmode = IEEE1284_MODE_EPP; else cam->ppmode = IEEE1284_MODE_ECP; break; case 1: // hw- or sw-ecp cam->ppmode = IEEE1284_MODE_ECP; break; case 2: // hw- or sw-epp cam->ppmode = IEEE1284_MODE_EPP; break; } // Tell the parport driver that we exists cam->pdev = parport_register_device(port, "w9966", NULL, NULL, NULL, 0, NULL); if (cam->pdev == NULL) { DPRINTF("parport_register_device() failed\n"); return -1; } w9966_setState(cam, W9966_STATE_PDEV, W9966_STATE_PDEV); w9966_pdev_claim(cam); // Setup a default capture mode if (w9966_setup(cam, 0, 0, 1023, 1023, 200, 160) != 0) { DPRINTF("w9966_setup() failed.\n"); return -1; } w9966_pdev_release(cam); // Fill in the video_device struct and register us to v4l memset(&cam->vdev, 0, sizeof(struct video_device)); strcpy(cam->vdev.name, W9966_DRIVERNAME); cam->vdev.type = VID_TYPE_CAPTURE | VID_TYPE_SCALES; cam->vdev.hardware = VID_HARDWARE_W9966; cam->vdev.open = &w9966_v4l_open; cam->vdev.close = &w9966_v4l_close; cam->vdev.read = &w9966_v4l_read; cam->vdev.ioctl = &w9966_v4l_ioctl; cam->vdev.priv = (void*)cam; cam->vdev.owner = THIS_MODULE; if (video_register_device(&cam->vdev, VFL_TYPE_GRABBER, video_nr) == -1) return -1; w9966_setState(cam, W9966_STATE_VDEV, W9966_STATE_VDEV); // All ok printk( "w9966cf: Found and initialized a webcam on %s.\n", cam->pport->name ); return 0; } // Terminate everything gracefully static void w9966_term(struct w9966_dev* cam) { // Unregister from v4l if (w9966_getState(cam, W9966_STATE_VDEV, W9966_STATE_VDEV)) { video_unregister_device(&cam->vdev); w9966_setState(cam, W9966_STATE_VDEV, 0); } // Terminate from IEEE1284 mode and release pdev block if (w9966_getState(cam, W9966_STATE_PDEV, W9966_STATE_PDEV)) { w9966_pdev_claim(cam); parport_negotiate(cam->pport, IEEE1284_MODE_COMPAT); w9966_pdev_release(cam); } // Unregister from parport if (w9966_getState(cam, W9966_STATE_PDEV, W9966_STATE_PDEV)) { parport_unregister_device(cam->pdev); w9966_setState(cam, W9966_STATE_PDEV, 0); } } // Find a good length for capture window (used both for W and H) // A bit ugly but pretty functional. The capture length // have to match the downscale static int w9966_findlen(int near, int size, int maxlen) { int bestlen = size; int besterr = abs(near - bestlen); int len; for(len = size+1;len < maxlen;len++) { int err; if ( ((64*size) %len) != 0) continue; err = abs(near - len); // Only continue as long as we keep getting better values if (err > besterr) break; besterr = err; bestlen = len; } return bestlen; } // Modify capture window (if necessary) // and calculate downscaling // Return -1 on error static int w9966_calcscale(int size, int min, int max, int* beg, int* end, unsigned char* factor) { int maxlen = max - min; int len = *end - *beg + 1; int newlen = w9966_findlen(len, size, maxlen); int err = newlen - len; // Check for bad format if (newlen > maxlen || newlen < size) return -1; // Set factor (6 bit fixed) *factor = (64*size) / newlen; if (*factor == 64) *factor = 0x00; // downscale is disabled else *factor |= 0x80; // set downscale-enable bit // Modify old beginning and end *beg -= err / 2; *end += err - (err / 2); // Move window if outside borders if (*beg < min) { *end += min - *beg; *beg += min - *beg; } if (*end > max) { *beg -= *end - max; *end -= *end - max; } return 0; } // Setup the cameras capture window etc. // Expects a claimed pdev // return -1 on error static int w9966_setup(struct w9966_dev* cam, int x1, int y1, int x2, int y2, int w, int h) { unsigned int i; unsigned int enh_s, enh_e; unsigned char scale_x, scale_y; unsigned char regs[0x1c]; unsigned char saa7111_regs[] = { 0x21, 0x00, 0xd8, 0x23, 0x00, 0x80, 0x80, 0x00, 0x88, 0x10, 0x80, 0x40, 0x40, 0x00, 0x01, 0x00, 0x48, 0x0c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x71, 0xe7, 0x00, 0x00, 0xc0 }; if (w*h*2 > W9966_SRAMSIZE) { DPRINTF("capture window exceeds SRAM size!.\n"); w = 200; h = 160; // Pick default values } w &= ~0x1; if (w < 2) w = 2; if (h < 1) h = 1; if (w > W9966_WND_MAX_W) w = W9966_WND_MAX_W; if (h > W9966_WND_MAX_H) h = W9966_WND_MAX_H; cam->width = w; cam->height = h; enh_s = 0; enh_e = w*h*2; // Modify capture window if necessary and calculate downscaling if ( 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); } // 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) { int 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 (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); } // 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); } // 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 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; } // Read a register from the i2c device. // Expects claimed pdev. -1 on error 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; } // 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_open(struct video_device *vdev, int flags) { return 0; } static void w9966_v4l_close(struct video_device *vdev) { } static int w9966_v4l_ioctl(struct video_device *vdev, unsigned int cmd, void *arg) { struct w9966_dev *cam = (struct w9966_dev*)vdev->priv; switch(cmd) { case VIDIOCGCAP: { struct video_capability vcap = { W9966_DRIVERNAME, // name VID_TYPE_CAPTURE | VID_TYPE_SCALES, // type 1, 0, // vid, aud channels W9966_WND_MAX_W, // max w W9966_WND_MAX_H, // max h 2, 1 // min w, min h }; if(copy_to_user(arg, &vcap, sizeof(vcap)) != 0) return -EFAULT; return 0; } case VIDIOCGCHAN: { struct video_channel vch; if(copy_from_user(&vch, arg, sizeof(vch)) != 0) return -EFAULT; if(vch.channel != 0) // We only support one channel (#0) return -EINVAL; strcpy(vch.name, "CCD-input"); vch.flags = 0; // We have no tuner or audio vch.tuners = 0; vch.type = VIDEO_TYPE_CAMERA; vch.norm = 0; // ??? if(copy_to_user(arg, &vch, sizeof(vch)) != 0) return -EFAULT; return 0; } case VIDIOCSCHAN: { struct video_channel vch; if(copy_from_user(&vch, arg, sizeof(vch) ) != 0) return -EFAULT; if(vch.channel != 0) return -EINVAL; return 0; } case VIDIOCGTUNER: { struct video_tuner vtune; if(copy_from_user(&vtune, arg, sizeof(vtune)) != 0) return -EFAULT; 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; if(copy_to_user(arg, &vtune, sizeof(vtune)) != 0) return -EFAULT; return 0; } case VIDIOCSTUNER: { struct video_tuner vtune; if (copy_from_user(&vtune, arg, sizeof(vtune)) != 0) return -EFAULT; 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 }; if(copy_to_user(arg, &vpic, sizeof(vpic)) != 0) return -EFAULT; return 0; } case VIDIOCSPICT: { struct video_picture vpic; if(copy_from_user(&vpic, arg, sizeof(vpic)) != 0) return -EFAULT; if (vpic.depth != 16 || vpic.palette != VIDEO_PALETTE_YUV422) 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 -EFAULT; } w9966_pdev_release(cam); return 0; } case VIDIOCSWIN: { int ret; struct video_window vwin; if (copy_from_user(&vwin, arg, sizeof(vwin)) != 0) return -EFAULT; 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 -EFAULT; } return 0; } case VIDIOCGWIN: { struct video_window vwin; memset(&vwin, 0, sizeof(vwin)); vwin.width = cam->width; vwin.height = cam->height; if(copy_to_user(arg, &vwin, sizeof(vwin)) != 0) return -EFAULT; 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; } // Capture data static long w9966_v4l_read(struct video_device *vdev, char *buf, unsigned long count, int noblock) { struct w9966_dev *cam = (struct w9966_dev *)vdev->priv; unsigned char addr = 0xa0; // ECP, read, CCD-transfer, 00000 unsigned char* dest = (unsigned char*)buf; unsigned long dleft = count; // 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; } while(dleft > 0) { unsigned long tsize = (dleft > W9966_RBUFFER) ? W9966_RBUFFER : dleft; unsigned char tbuf[W9966_RBUFFER]; if (parport_read(cam->pport, tbuf, tsize) < tsize) { w9966_pdev_release(cam); return -EFAULT; } if (copy_to_user(dest, tbuf, tsize) != 0) { w9966_pdev_release(cam); return -EFAULT; } dest += tsize; dleft -= tsize; } w9966_wReg(cam, 0x01, 0x18); // Disable capture 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 = { W9966_DRIVERNAME, w9966_attach, w9966_detach, NULL }; // 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); |