/* Winbond w9966cf Webcam parport driver. Version 0.33 Copyright (C) 2001 Jakob Kemi 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 #include #include #include #include #include #include #include #include /*#define DEBUG*/ /* Undef me for production */ #ifdef DEBUG #define DPRINTF(x, a...) printk(KERN_DEBUG "W9966: %s(): "x, __func__ , ##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 { struct v4l2_device v4l2_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; struct mutex lock; }; /* * Module specific properties */ MODULE_AUTHOR("Jakob Kemi "); MODULE_DESCRIPTION("Winbond w9966cf WebCam driver (0.32)"); MODULE_LICENSE("GPL"); MODULE_VERSION("0.33.1"); #ifdef MODULE static const char *pardev[] = {[0 ... W9966_MAXCAMS] = ""}; #else static const char *pardev[] = {[0 ... W9966_MAXCAMS] = "aggressive"}; #endif module_param_array(pardev, charp, NULL, 0); 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\n" "\tcam 1 to parport3 and search every parport for cam 2 etc..."); static int parmode; module_param(parmode, int, 0); MODULE_PARM_DESC(parmode, "parmode: transfer mode (0=auto, 1=ecp, 2=epp"); static int video_nr = -1; module_param(video_nr, int, 0); static struct w9966 w9966_cams[W9966_MAXCAMS]; /* * Private function defines */ /* Set camera phase flags, so we know what to uninit when terminating */ static inline void w9966_set_state(struct w9966 *cam, int mask, int val) { cam->dev_state = (cam->dev_state & ~mask) ^ val; } /* Get camera phase flags */ static inline int w9966_get_state(struct w9966 *cam, int mask, int val) { return ((cam->dev_state & mask) == val); } /* Claim parport for ourself */ static void w9966_pdev_claim(struct w9966 *cam) { if (w9966_get_state(cam, W9966_STATE_CLAIMED, W9966_STATE_CLAIMED)) return; parport_claim_or_block(cam->pdev); w9966_set_state(cam, W9966_STATE_CLAIMED, W9966_STATE_CLAIMED); } /* Release parport for others to use */ static void w9966_pdev_release(struct w9966 *cam) { if (w9966_get_state(cam, W9966_STATE_CLAIMED, 0)) return; parport_release(cam->pdev); w9966_set_state(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_read_reg(struct w9966 *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_write_reg(struct w9966 *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; } /* * Ugly and primitive i2c protocol functions */ /* Sets the data line on the i2c bus. Expects a claimed pdev. */ static void w9966_i2c_setsda(struct w9966 *cam, int state) { if (state) cam->i2c_state |= W9966_I2C_W_DATA; else cam->i2c_state &= ~W9966_I2C_W_DATA; w9966_write_reg(cam, 0x18, cam->i2c_state); udelay(5); } /* Get peripheral clock line Expects a claimed pdev. */ static int w9966_i2c_getscl(struct w9966 *cam) { const unsigned char state = w9966_read_reg(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 int w9966_i2c_setscl(struct w9966 *cam, int state) { unsigned long timeout; if (state) cam->i2c_state |= W9966_I2C_W_CLOCK; else cam->i2c_state &= ~W9966_I2C_W_CLOCK; w9966_write_reg(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; } #if 0 /* Get peripheral data line Expects a claimed pdev. */ static int w9966_i2c_getsda(struct w9966 *cam) { const unsigned char state = w9966_read_reg(cam, 0x18); return ((state & W9966_I2C_R_DATA) > 0); } #endif /* Write a byte with ack to the i2c bus. Expects a claimed pdev. -1 on error */ static int w9966_i2c_wbyte(struct w9966 *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 *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_read_reg_i2c(struct w9966 *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) return -1; data = w9966_i2c_rbyte(cam); if (data == -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_write_reg_i2c(struct w9966 *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; } /* 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 *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_write_reg(cam, 0x00, 0x03) == -1) return -1; /* Write regs to w9966cf chip */ for (i = 0; i < 0x1c; i++) if (w9966_write_reg(cam, i, regs[i]) == -1) return -1; /* Write regs to saa7111 chip */ for (i = 0; i < 0x20; i++) if (w9966_write_reg_i2c(cam, i, saa7111_regs[i]) == -1) return -1; return 0; } /* * Video4linux interfacing */ static int cam_querycap(struct file *file, void *priv, struct v4l2_capability *vcap) { struct w9966 *cam = video_drvdata(file); strlcpy(vcap->driver, cam->v4l2_dev.name, sizeof(vcap->driver)); strlcpy(vcap->card, W9966_DRIVERNAME, sizeof(vcap->card)); strlcpy(vcap->bus_info, "parport", sizeof(vcap->bus_info)); vcap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE; return 0; } static int cam_enum_input(struct file *file, void *fh, struct v4l2_input *vin) { if (vin->index > 0) return -EINVAL; strlcpy(vin->name, "Camera", sizeof(vin->name)); vin->type = V4L2_INPUT_TYPE_CAMERA; vin->audioset = 0; vin->tuner = 0; vin->std = 0; vin->status = 0; return 0; } static int cam_g_input(struct file *file, void *fh, unsigned int *inp) { *inp = 0; return 0; } static int cam_s_input(struct file *file, void *fh, unsigned int inp) { return (inp > 0) ? -EINVAL : 0; } static int cam_queryctrl(struct file *file, void *priv, struct v4l2_queryctrl *qc) { switch (qc->id) { case V4L2_CID_BRIGHTNESS: return v4l2_ctrl_query_fill(qc, 0, 255, 1, 128); case V4L2_CID_CONTRAST: return v4l2_ctrl_query_fill(qc, -64, 64, 1, 64); case V4L2_CID_SATURATION: return v4l2_ctrl_query_fill(qc, -64, 64, 1, 64); case V4L2_CID_HUE: return v4l2_ctrl_query_fill(qc, -128, 127, 1, 0); } return -EINVAL; } static int cam_g_ctrl(struct file *file, void *priv, struct v4l2_control *ctrl) { struct w9966 *cam = video_drvdata(file); int ret = 0; switch (ctrl->id) { case V4L2_CID_BRIGHTNESS: ctrl->value = cam->brightness; break; case V4L2_CID_CONTRAST: ctrl->value = cam->contrast; break; case V4L2_CID_SATURATION: ctrl->value = cam->color; break; case V4L2_CID_HUE: ctrl->value = cam->hue; break; default: ret = -EINVAL; break; } return ret; } static int cam_s_ctrl(struct file *file, void *priv, struct v4l2_control *ctrl) { struct w9966 *cam = video_drvdata(file); int ret = 0; mutex_lock(&cam->lock); switch (ctrl->id) { case V4L2_CID_BRIGHTNESS: cam->brightness = ctrl->value; break; case V4L2_CID_CONTRAST: cam->contrast = ctrl->value; break; case V4L2_CID_SATURATION: cam->color = ctrl->value; break; case V4L2_CID_HUE: cam->hue = ctrl->value; break; default: ret = -EINVAL; break; } if (ret == 0) { w9966_pdev_claim(cam); if (w9966_write_reg_i2c(cam, 0x0a, cam->brightness) == -1 || w9966_write_reg_i2c(cam, 0x0b, cam->contrast) == -1 || w9966_write_reg_i2c(cam, 0x0c, cam->color) == -1 || w9966_write_reg_i2c(cam, 0x0d, cam->hue) == -1) { ret = -EIO; } w9966_pdev_release(cam); } mutex_unlock(&cam->lock); return ret; } static int cam_g_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *fmt) { struct w9966 *cam = video_drvdata(file); struct v4l2_pix_format *pix = &fmt->fmt.pix; pix->width = cam->width; pix->height = cam->height; pix->pixelformat = V4L2_PIX_FMT_YUYV; pix->field = V4L2_FIELD_NONE; pix->bytesperline = 2 * cam->width; pix->sizeimage = 2 * cam->width * cam->height; /* Just a guess */ pix->colorspace = V4L2_COLORSPACE_SMPTE170M; return 0; } static int cam_try_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *fmt) { struct v4l2_pix_format *pix = &fmt->fmt.pix; if (pix->width < 2) pix->width = 2; if (pix->height < 1) pix->height = 1; if (pix->width > W9966_WND_MAX_W) pix->width = W9966_WND_MAX_W; if (pix->height > W9966_WND_MAX_H) pix->height = W9966_WND_MAX_H; pix->pixelformat = V4L2_PIX_FMT_YUYV; pix->field = V4L2_FIELD_NONE; pix->bytesperline = 2 * pix->width; pix->sizeimage = 2 * pix->width * pix->height; /* Just a guess */ pix->colorspace = V4L2_COLORSPACE_SMPTE170M; return 0; } static int cam_s_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *fmt) { struct w9966 *cam = video_drvdata(file); struct v4l2_pix_format *pix = &fmt->fmt.pix; int ret = cam_try_fmt_vid_cap(file, fh, fmt); if (ret) return ret; mutex_lock(&cam->lock); /* Update camera regs */ w9966_pdev_claim(cam); ret = w9966_setup(cam, 0, 0, 1023, 1023, pix->width, pix->height); w9966_pdev_release(cam); mutex_unlock(&cam->lock); return ret; } static int cam_enum_fmt_vid_cap(struct file *file, void *fh, struct v4l2_fmtdesc *fmt) { static struct v4l2_fmtdesc formats[] = { { 0, 0, 0, "YUV 4:2:2", V4L2_PIX_FMT_YUYV, { 0, 0, 0, 0 } }, }; enum v4l2_buf_type type = fmt->type; if (fmt->index > 0) return -EINVAL; *fmt = formats[fmt->index]; fmt->type = type; return 0; } /* Capture data */ static ssize_t w9966_v4l_read(struct file *file, char __user *buf, size_t count, loff_t *ppos) { struct w9966 *cam = video_drvdata(file); 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; mutex_lock(&cam->lock); w9966_pdev_claim(cam); w9966_write_reg(cam, 0x00, 0x02); /* Reset ECP-FIFO buffer */ w9966_write_reg(cam, 0x00, 0x00); /* Return to normal operation */ w9966_write_reg(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); mutex_unlock(&cam->lock); 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_write_reg(cam, 0x01, 0x18); /* Disable capture */ out: kfree(tbuf); w9966_pdev_release(cam); mutex_unlock(&cam->lock); return count; } static const struct v4l2_file_operations w9966_fops = { .owner = THIS_MODULE, .unlocked_ioctl = video_ioctl2, .read = w9966_v4l_read, }; static const struct v4l2_ioctl_ops w9966_ioctl_ops = { .vidioc_querycap = cam_querycap, .vidioc_g_input = cam_g_input, .vidioc_s_input = cam_s_input, .vidioc_enum_input = cam_enum_input, .vidioc_queryctrl = cam_queryctrl, .vidioc_g_ctrl = cam_g_ctrl, .vidioc_s_ctrl = cam_s_ctrl, .vidioc_enum_fmt_vid_cap = cam_enum_fmt_vid_cap, .vidioc_g_fmt_vid_cap = cam_g_fmt_vid_cap, .vidioc_s_fmt_vid_cap = cam_s_fmt_vid_cap, .vidioc_try_fmt_vid_cap = cam_try_fmt_vid_cap, }; /* 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 *cam, struct parport *port) { struct v4l2_device *v4l2_dev = &cam->v4l2_dev; if (cam->dev_state != 0) return -1; strlcpy(v4l2_dev->name, "w9966", sizeof(v4l2_dev->name)); if (v4l2_device_register(NULL, v4l2_dev) < 0) { v4l2_err(v4l2_dev, "Could not register v4l2_device\n"); 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_set_state(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 */ strlcpy(cam->vdev.name, W9966_DRIVERNAME, sizeof(cam->vdev.name)); cam->vdev.v4l2_dev = v4l2_dev; cam->vdev.fops = &w9966_fops; cam->vdev.ioctl_ops = &w9966_ioctl_ops; cam->vdev.release = video_device_release_empty; video_set_drvdata(&cam->vdev, cam); mutex_init(&cam->lock); if (video_register_device(&cam->vdev, VFL_TYPE_GRABBER, video_nr) < 0) return -1; w9966_set_state(cam, W9966_STATE_VDEV, W9966_STATE_VDEV); /* All ok */ v4l2_info(v4l2_dev, "Found and initialized a webcam on %s.\n", cam->pport->name); return 0; } /* Terminate everything gracefully */ static void w9966_term(struct w9966 *cam) { /* Unregister from v4l */ if (w9966_get_state(cam, W9966_STATE_VDEV, W9966_STATE_VDEV)) { video_unregister_device(&cam->vdev); w9966_set_state(cam, W9966_STATE_VDEV, 0); } /* Terminate from IEEE1284 mode and release pdev block */ if (w9966_get_state(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_get_state(cam, W9966_STATE_PDEV, W9966_STATE_PDEV)) { parport_unregister_device(cam->pdev); w9966_set_state(cam, W9966_STATE_PDEV, 0); } memset(cam, 0, sizeof(*cam)); } /* 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);