2 Winbond w9966cf Webcam parport driver.
6 Copyright (C) 2001 Jakob Kemi <jakob.kemi@post.utfors.se>
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 *Lifeview FlyCam Supra (using the Philips saa7111a chip)
26 Does any other model using the w9966 interface chip exist ?
30 *Add a working EPP mode, since DMA ECP read isn't implemented
31 in the parport drivers. (That's why it's so sloow)
33 *Add support for other ccd-control chips than the saa7111
34 please send me feedback on what kind of chips you have.
36 *Add proper probing. I don't know what's wrong with the IEEE1284
37 parport drivers but (IEEE1284_MODE_NIBBLE|IEEE1284_DEVICE_ID)
38 and nibble read seems to be broken for some peripherals.
40 *Add probing for onboard SRAM, port directions etc. (if possible)
42 *Add support for the hardware compressed modes (maybe using v4l2)
44 *Fix better support for the capture window (no skewed images, v4l
45 interface to capt. window)
47 *Probably some bugs that I don't know of
49 Please support me by sending feedback!
53 Alan Cox: Removed RGB mode for kernel merge, added THIS_MODULE
54 and owner support for newer module locks
57 #include <linux/module.h>
58 #include <linux/init.h>
59 #include <linux/delay.h>
60 #include <linux/videodev2.h>
61 #include <media/v4l2-common.h>
62 #include <media/v4l2-ioctl.h>
63 #include <linux/parport.h>
65 /*#define DEBUG*/ /* Undef me for production */
68 #define DPRINTF(x, a...) printk(KERN_DEBUG "W9966: %s(): "x, __func__ , ##a)
74 * Defines, simple typedefs etc.
77 #define W9966_DRIVERNAME "W9966CF Webcam"
78 #define W9966_MAXCAMS 4 // Maximum number of cameras
79 #define W9966_RBUFFER 2048 // Read buffer (must be an even number)
80 #define W9966_SRAMSIZE 131072 // 128kb
81 #define W9966_SRAMID 0x02 // check w9966cf.pdf
83 // Empirically determined window limits
84 #define W9966_WND_MIN_X 16
85 #define W9966_WND_MIN_Y 14
86 #define W9966_WND_MAX_X 705
87 #define W9966_WND_MAX_Y 253
88 #define W9966_WND_MAX_W (W9966_WND_MAX_X - W9966_WND_MIN_X)
89 #define W9966_WND_MAX_H (W9966_WND_MAX_Y - W9966_WND_MIN_Y)
91 // Keep track of our current state
92 #define W9966_STATE_PDEV 0x01
93 #define W9966_STATE_CLAIMED 0x02
94 #define W9966_STATE_VDEV 0x04
96 #define W9966_I2C_W_ID 0x48
97 #define W9966_I2C_R_ID 0x49
98 #define W9966_I2C_R_DATA 0x08
99 #define W9966_I2C_R_CLOCK 0x04
100 #define W9966_I2C_W_DATA 0x02
101 #define W9966_I2C_W_CLOCK 0x01
104 unsigned char dev_state;
105 unsigned char i2c_state;
106 unsigned short ppmode;
107 struct parport* pport;
108 struct pardevice* pdev;
109 struct video_device vdev;
110 unsigned short width;
111 unsigned short height;
112 unsigned char brightness;
113 signed char contrast;
116 unsigned long in_use;
120 * Module specific properties
123 MODULE_AUTHOR("Jakob Kemi <jakob.kemi@post.utfors.se>");
124 MODULE_DESCRIPTION("Winbond w9966cf WebCam driver (0.32)");
125 MODULE_LICENSE("GPL");
129 static const char* pardev[] = {[0 ... W9966_MAXCAMS] = ""};
131 static const char* pardev[] = {[0 ... W9966_MAXCAMS] = "aggressive"};
133 module_param_array(pardev, charp, NULL, 0);
134 MODULE_PARM_DESC(pardev, "pardev: where to search for\n\
135 \teach camera. 'aggressive' means brute-force search.\n\
136 \tEg: >pardev=parport3,aggressive,parport2,parport1< would assign\n\
137 \tcam 1 to parport3 and search every parport for cam 2 etc...");
140 module_param(parmode, int, 0);
141 MODULE_PARM_DESC(parmode, "parmode: transfer mode (0=auto, 1=ecp, 2=epp");
143 static int video_nr = -1;
144 module_param(video_nr, int, 0);
150 static struct w9966_dev w9966_cams[W9966_MAXCAMS];
153 * Private function declares
156 static inline void w9966_setState(struct w9966_dev* cam, int mask, int val);
157 static inline int w9966_getState(struct w9966_dev* cam, int mask, int val);
158 static inline void w9966_pdev_claim(struct w9966_dev *vdev);
159 static inline void w9966_pdev_release(struct w9966_dev *vdev);
161 static int w9966_rReg(struct w9966_dev* cam, int reg);
162 static int w9966_wReg(struct w9966_dev* cam, int reg, int data);
164 static int w9966_rReg_i2c(struct w9966_dev* cam, int reg);
166 static int w9966_wReg_i2c(struct w9966_dev* cam, int reg, int data);
167 static int w9966_findlen(int near, int size, int maxlen);
168 static int w9966_calcscale(int size, int min, int max, int* beg, int* end, unsigned char* factor);
169 static int w9966_setup(struct w9966_dev* cam, int x1, int y1, int x2, int y2, int w, int h);
171 static int w9966_init(struct w9966_dev* cam, struct parport* port);
172 static void w9966_term(struct w9966_dev* cam);
174 static inline void w9966_i2c_setsda(struct w9966_dev* cam, int state);
175 static inline int w9966_i2c_setscl(struct w9966_dev* cam, int state);
176 static inline int w9966_i2c_getsda(struct w9966_dev* cam);
177 static inline int w9966_i2c_getscl(struct w9966_dev* cam);
178 static int w9966_i2c_wbyte(struct w9966_dev* cam, int data);
180 static int w9966_i2c_rbyte(struct w9966_dev* cam);
183 static int w9966_v4l_ioctl(struct inode *inode, struct file *file,
184 unsigned int cmd, unsigned long arg);
185 static ssize_t w9966_v4l_read(struct file *file, char __user *buf,
186 size_t count, loff_t *ppos);
188 static int w9966_exclusive_open(struct inode *inode, struct file *file)
190 struct video_device *vdev = video_devdata(file);
191 struct w9966_dev *cam = vdev->priv;
193 return test_and_set_bit(0, &cam->in_use) ? -EBUSY : 0;
196 static int w9966_exclusive_release(struct inode *inode, struct file *file)
198 struct video_device *vdev = video_devdata(file);
199 struct w9966_dev *cam = vdev->priv;
201 clear_bit(0, &cam->in_use);
205 static const struct file_operations w9966_fops = {
206 .owner = THIS_MODULE,
207 .open = w9966_exclusive_open,
208 .release = w9966_exclusive_release,
209 .ioctl = w9966_v4l_ioctl,
211 .compat_ioctl = v4l_compat_ioctl32,
213 .read = w9966_v4l_read,
216 static struct video_device w9966_template = {
217 .name = W9966_DRIVERNAME,
222 * Private function defines
226 // Set camera phase flags, so we know what to uninit when terminating
227 static inline void w9966_setState(struct w9966_dev* cam, int mask, int val)
229 cam->dev_state = (cam->dev_state & ~mask) ^ val;
232 // Get camera phase flags
233 static inline int w9966_getState(struct w9966_dev* cam, int mask, int val)
235 return ((cam->dev_state & mask) == val);
238 // Claim parport for ourself
239 static inline void w9966_pdev_claim(struct w9966_dev* cam)
241 if (w9966_getState(cam, W9966_STATE_CLAIMED, W9966_STATE_CLAIMED))
243 parport_claim_or_block(cam->pdev);
244 w9966_setState(cam, W9966_STATE_CLAIMED, W9966_STATE_CLAIMED);
247 // Release parport for others to use
248 static inline void w9966_pdev_release(struct w9966_dev* cam)
250 if (w9966_getState(cam, W9966_STATE_CLAIMED, 0))
252 parport_release(cam->pdev);
253 w9966_setState(cam, W9966_STATE_CLAIMED, 0);
256 // Read register from W9966 interface-chip
257 // Expects a claimed pdev
258 // -1 on error, else register data (byte)
259 static int w9966_rReg(struct w9966_dev* cam, int reg)
261 // ECP, read, regtransfer, REG, REG, REG, REG, REG
262 const unsigned char addr = 0x80 | (reg & 0x1f);
265 if (parport_negotiate(cam->pport, cam->ppmode | IEEE1284_ADDR) != 0)
267 if (parport_write(cam->pport, &addr, 1) != 1)
269 if (parport_negotiate(cam->pport, cam->ppmode | IEEE1284_DATA) != 0)
271 if (parport_read(cam->pport, &val, 1) != 1)
277 // Write register to W9966 interface-chip
278 // Expects a claimed pdev
280 static int w9966_wReg(struct w9966_dev* cam, int reg, int data)
282 // ECP, write, regtransfer, REG, REG, REG, REG, REG
283 const unsigned char addr = 0xc0 | (reg & 0x1f);
284 const unsigned char val = data;
286 if (parport_negotiate(cam->pport, cam->ppmode | IEEE1284_ADDR) != 0)
288 if (parport_write(cam->pport, &addr, 1) != 1)
290 if (parport_negotiate(cam->pport, cam->ppmode | IEEE1284_DATA) != 0)
292 if (parport_write(cam->pport, &val, 1) != 1)
298 // Initialize camera device. Setup all internal flags, set a
299 // default video mode, setup ccd-chip, register v4l device etc..
300 // Also used for 'probing' of hardware.
302 static int w9966_init(struct w9966_dev* cam, struct parport* port)
304 if (cam->dev_state != 0)
308 cam->brightness = 128;
313 // Select requested transfer mode
316 default: // Auto-detect (priority: hw-ecp, hw-epp, sw-ecp)
318 if (port->modes & PARPORT_MODE_ECP)
319 cam->ppmode = IEEE1284_MODE_ECP;
320 else if (port->modes & PARPORT_MODE_EPP)
321 cam->ppmode = IEEE1284_MODE_EPP;
323 cam->ppmode = IEEE1284_MODE_ECP;
325 case 1: // hw- or sw-ecp
326 cam->ppmode = IEEE1284_MODE_ECP;
328 case 2: // hw- or sw-epp
329 cam->ppmode = IEEE1284_MODE_EPP;
333 // Tell the parport driver that we exists
334 cam->pdev = parport_register_device(port, "w9966", NULL, NULL, NULL, 0, NULL);
335 if (cam->pdev == NULL) {
336 DPRINTF("parport_register_device() failed\n");
339 w9966_setState(cam, W9966_STATE_PDEV, W9966_STATE_PDEV);
341 w9966_pdev_claim(cam);
343 // Setup a default capture mode
344 if (w9966_setup(cam, 0, 0, 1023, 1023, 200, 160) != 0) {
345 DPRINTF("w9966_setup() failed.\n");
349 w9966_pdev_release(cam);
351 // Fill in the video_device struct and register us to v4l
352 memcpy(&cam->vdev, &w9966_template, sizeof(struct video_device));
353 cam->vdev.priv = cam;
355 if (video_register_device(&cam->vdev, VFL_TYPE_GRABBER, video_nr) < 0)
358 w9966_setState(cam, W9966_STATE_VDEV, W9966_STATE_VDEV);
362 "w9966cf: Found and initialized a webcam on %s.\n",
369 // Terminate everything gracefully
370 static void w9966_term(struct w9966_dev* cam)
372 // Unregister from v4l
373 if (w9966_getState(cam, W9966_STATE_VDEV, W9966_STATE_VDEV)) {
374 video_unregister_device(&cam->vdev);
375 w9966_setState(cam, W9966_STATE_VDEV, 0);
378 // Terminate from IEEE1284 mode and release pdev block
379 if (w9966_getState(cam, W9966_STATE_PDEV, W9966_STATE_PDEV)) {
380 w9966_pdev_claim(cam);
381 parport_negotiate(cam->pport, IEEE1284_MODE_COMPAT);
382 w9966_pdev_release(cam);
385 // Unregister from parport
386 if (w9966_getState(cam, W9966_STATE_PDEV, W9966_STATE_PDEV)) {
387 parport_unregister_device(cam->pdev);
388 w9966_setState(cam, W9966_STATE_PDEV, 0);
393 // Find a good length for capture window (used both for W and H)
394 // A bit ugly but pretty functional. The capture length
395 // have to match the downscale
396 static int w9966_findlen(int near, int size, int maxlen)
399 int besterr = abs(near - bestlen);
402 for(len = size+1;len < maxlen;len++)
405 if ( ((64*size) %len) != 0)
408 err = abs(near - len);
410 // Only continue as long as we keep getting better values
421 // Modify capture window (if necessary)
422 // and calculate downscaling
423 // Return -1 on error
424 static int w9966_calcscale(int size, int min, int max, int* beg, int* end, unsigned char* factor)
426 int maxlen = max - min;
427 int len = *end - *beg + 1;
428 int newlen = w9966_findlen(len, size, maxlen);
429 int err = newlen - len;
431 // Check for bad format
432 if (newlen > maxlen || newlen < size)
435 // Set factor (6 bit fixed)
436 *factor = (64*size) / newlen;
438 *factor = 0x00; // downscale is disabled
440 *factor |= 0x80; // set downscale-enable bit
442 // Modify old beginning and end
444 *end += err - (err / 2);
446 // Move window if outside borders
459 // Setup the cameras capture window etc.
460 // Expects a claimed pdev
461 // return -1 on error
462 static int w9966_setup(struct w9966_dev* cam, int x1, int y1, int x2, int y2, int w, int h)
465 unsigned int enh_s, enh_e;
466 unsigned char scale_x, scale_y;
467 unsigned char regs[0x1c];
468 unsigned char saa7111_regs[] = {
469 0x21, 0x00, 0xd8, 0x23, 0x00, 0x80, 0x80, 0x00,
470 0x88, 0x10, 0x80, 0x40, 0x40, 0x00, 0x01, 0x00,
471 0x48, 0x0c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
472 0x00, 0x00, 0x00, 0x71, 0xe7, 0x00, 0x00, 0xc0
476 if (w*h*2 > W9966_SRAMSIZE)
478 DPRINTF("capture window exceeds SRAM size!.\n");
479 w = 200; h = 160; // Pick default values
485 if (w > W9966_WND_MAX_W) w = W9966_WND_MAX_W;
486 if (h > W9966_WND_MAX_H) h = W9966_WND_MAX_H;
494 // Modify capture window if necessary and calculate downscaling
496 w9966_calcscale(w, W9966_WND_MIN_X, W9966_WND_MAX_X, &x1, &x2, &scale_x) != 0 ||
497 w9966_calcscale(h, W9966_WND_MIN_Y, W9966_WND_MAX_Y, &y1, &y2, &scale_y) != 0
501 "%dx%d, x: %d<->%d, y: %d<->%d, sx: %d/64, sy: %d/64.\n",
502 w, h, x1, x2, y1, y2, scale_x&~0x80, scale_y&~0x80
506 regs[0x00] = 0x00; // Set normal operation
507 regs[0x01] = 0x18; // Capture mode
508 regs[0x02] = scale_y; // V-scaling
509 regs[0x03] = scale_x; // H-scaling
512 regs[0x04] = (x1 & 0x0ff); // X-start (8 low bits)
513 regs[0x05] = (x1 & 0x300)>>8; // X-start (2 high bits)
514 regs[0x06] = (y1 & 0x0ff); // Y-start (8 low bits)
515 regs[0x07] = (y1 & 0x300)>>8; // Y-start (2 high bits)
516 regs[0x08] = (x2 & 0x0ff); // X-end (8 low bits)
517 regs[0x09] = (x2 & 0x300)>>8; // X-end (2 high bits)
518 regs[0x0a] = (y2 & 0x0ff); // Y-end (8 low bits)
520 regs[0x0c] = W9966_SRAMID; // SRAM-banks (1x 128kb)
523 regs[0x0d] = (enh_s& 0x000ff); // Enh. start (0-7)
524 regs[0x0e] = (enh_s& 0x0ff00)>>8; // Enh. start (8-15)
525 regs[0x0f] = (enh_s& 0x70000)>>16; // Enh. start (16-17/18??)
526 regs[0x10] = (enh_e& 0x000ff); // Enh. end (0-7)
527 regs[0x11] = (enh_e& 0x0ff00)>>8; // Enh. end (8-15)
528 regs[0x12] = (enh_e& 0x70000)>>16; // Enh. end (16-17/18??)
531 regs[0x13] = 0x40; // VEE control (raw 4:2:2)
532 regs[0x17] = 0x00; // ???
533 regs[0x18] = cam->i2c_state = 0x00; // Serial bus
534 regs[0x19] = 0xff; // I/O port direction control
535 regs[0x1a] = 0xff; // I/O port data register
536 regs[0x1b] = 0x10; // ???
538 // SAA7111 chip settings
539 saa7111_regs[0x0a] = cam->brightness;
540 saa7111_regs[0x0b] = cam->contrast;
541 saa7111_regs[0x0c] = cam->color;
542 saa7111_regs[0x0d] = cam->hue;
544 // Reset (ECP-fifo & serial-bus)
545 if (w9966_wReg(cam, 0x00, 0x03) == -1)
548 // Write regs to w9966cf chip
549 for (i = 0; i < 0x1c; i++)
550 if (w9966_wReg(cam, i, regs[i]) == -1)
553 // Write regs to saa7111 chip
554 for (i = 0; i < 0x20; i++)
555 if (w9966_wReg_i2c(cam, i, saa7111_regs[i]) == -1)
562 * Ugly and primitive i2c protocol functions
565 // Sets the data line on the i2c bus.
566 // Expects a claimed pdev.
567 static inline void w9966_i2c_setsda(struct w9966_dev* cam, int state)
570 cam->i2c_state |= W9966_I2C_W_DATA;
572 cam->i2c_state &= ~W9966_I2C_W_DATA;
574 w9966_wReg(cam, 0x18, cam->i2c_state);
578 // Get peripheral clock line
579 // Expects a claimed pdev.
580 static inline int w9966_i2c_getscl(struct w9966_dev* cam)
582 const unsigned char state = w9966_rReg(cam, 0x18);
583 return ((state & W9966_I2C_R_CLOCK) > 0);
586 // Sets the clock line on the i2c bus.
587 // Expects a claimed pdev. -1 on error
588 static inline int w9966_i2c_setscl(struct w9966_dev* cam, int state)
590 unsigned long timeout;
593 cam->i2c_state |= W9966_I2C_W_CLOCK;
595 cam->i2c_state &= ~W9966_I2C_W_CLOCK;
597 w9966_wReg(cam, 0x18, cam->i2c_state);
600 // we go to high, we also expect the peripheral to ack.
602 timeout = jiffies + 100;
603 while (!w9966_i2c_getscl(cam)) {
604 if (time_after(jiffies, timeout))
611 // Get peripheral data line
612 // Expects a claimed pdev.
613 static inline int w9966_i2c_getsda(struct w9966_dev* cam)
615 const unsigned char state = w9966_rReg(cam, 0x18);
616 return ((state & W9966_I2C_R_DATA) > 0);
619 // Write a byte with ack to the i2c bus.
620 // Expects a claimed pdev. -1 on error
621 static int w9966_i2c_wbyte(struct w9966_dev* cam, int data)
624 for (i = 7; i >= 0; i--)
626 w9966_i2c_setsda(cam, (data >> i) & 0x01);
628 if (w9966_i2c_setscl(cam, 1) == -1)
630 w9966_i2c_setscl(cam, 0);
633 w9966_i2c_setsda(cam, 1);
635 if (w9966_i2c_setscl(cam, 1) == -1)
637 w9966_i2c_setscl(cam, 0);
642 // Read a data byte with ack from the i2c-bus
643 // Expects a claimed pdev. -1 on error
645 static int w9966_i2c_rbyte(struct w9966_dev* cam)
647 unsigned char data = 0x00;
650 w9966_i2c_setsda(cam, 1);
652 for (i = 0; i < 8; i++)
654 if (w9966_i2c_setscl(cam, 1) == -1)
657 if (w9966_i2c_getsda(cam))
660 w9966_i2c_setscl(cam, 0);
666 // Read a register from the i2c device.
667 // Expects claimed pdev. -1 on error
669 static int w9966_rReg_i2c(struct w9966_dev* cam, int reg)
673 w9966_i2c_setsda(cam, 0);
674 w9966_i2c_setscl(cam, 0);
677 w9966_i2c_wbyte(cam, W9966_I2C_W_ID) == -1 ||
678 w9966_i2c_wbyte(cam, reg) == -1
682 w9966_i2c_setsda(cam, 1);
683 if (w9966_i2c_setscl(cam, 1) == -1)
685 w9966_i2c_setsda(cam, 0);
686 w9966_i2c_setscl(cam, 0);
689 w9966_i2c_wbyte(cam, W9966_I2C_R_ID) == -1 ||
690 (data = w9966_i2c_rbyte(cam)) == -1
694 w9966_i2c_setsda(cam, 0);
696 if (w9966_i2c_setscl(cam, 1) == -1)
698 w9966_i2c_setsda(cam, 1);
704 // Write a register to the i2c device.
705 // Expects claimed pdev. -1 on error
706 static int w9966_wReg_i2c(struct w9966_dev* cam, int reg, int data)
708 w9966_i2c_setsda(cam, 0);
709 w9966_i2c_setscl(cam, 0);
712 w9966_i2c_wbyte(cam, W9966_I2C_W_ID) == -1 ||
713 w9966_i2c_wbyte(cam, reg) == -1 ||
714 w9966_i2c_wbyte(cam, data) == -1
718 w9966_i2c_setsda(cam, 0);
719 if (w9966_i2c_setscl(cam, 1) == -1)
722 w9966_i2c_setsda(cam, 1);
728 * Video4linux interfacing
731 static int w9966_v4l_do_ioctl(struct inode *inode, struct file *file,
732 unsigned int cmd, void *arg)
734 struct video_device *vdev = video_devdata(file);
735 struct w9966_dev *cam = vdev->priv;
741 static struct video_capability vcap = {
742 .name = W9966_DRIVERNAME,
743 .type = VID_TYPE_CAPTURE | VID_TYPE_SCALES,
745 .maxwidth = W9966_WND_MAX_W,
746 .maxheight = W9966_WND_MAX_H,
750 struct video_capability *cap = arg;
756 struct video_channel *vch = arg;
757 if(vch->channel != 0) // We only support one channel (#0)
759 memset(vch,0,sizeof(*vch));
760 strcpy(vch->name, "CCD-input");
761 vch->type = VIDEO_TYPE_CAMERA;
766 struct video_channel *vch = arg;
767 if(vch->channel != 0)
773 struct video_tuner *vtune = arg;
774 if(vtune->tuner != 0)
776 strcpy(vtune->name, "no tuner");
778 vtune->rangehigh = 0;
779 vtune->flags = VIDEO_TUNER_NORM;
780 vtune->mode = VIDEO_MODE_AUTO;
781 vtune->signal = 0xffff;
786 struct video_tuner *vtune = arg;
787 if (vtune->tuner != 0)
789 if (vtune->mode != VIDEO_MODE_AUTO)
795 struct video_picture vpic = {
796 cam->brightness << 8, // brightness
797 (cam->hue + 128) << 8, // hue
798 cam->color << 9, // color
799 cam->contrast << 9, // contrast
801 16, VIDEO_PALETTE_YUV422// bpp, palette format
803 struct video_picture *pic = arg;
809 struct video_picture *vpic = arg;
810 if (vpic->depth != 16 || (vpic->palette != VIDEO_PALETTE_YUV422 && vpic->palette != VIDEO_PALETTE_YUYV))
813 cam->brightness = vpic->brightness >> 8;
814 cam->hue = (vpic->hue >> 8) - 128;
815 cam->color = vpic->colour >> 9;
816 cam->contrast = vpic->contrast >> 9;
818 w9966_pdev_claim(cam);
821 w9966_wReg_i2c(cam, 0x0a, cam->brightness) == -1 ||
822 w9966_wReg_i2c(cam, 0x0b, cam->contrast) == -1 ||
823 w9966_wReg_i2c(cam, 0x0c, cam->color) == -1 ||
824 w9966_wReg_i2c(cam, 0x0d, cam->hue) == -1
826 w9966_pdev_release(cam);
830 w9966_pdev_release(cam);
836 struct video_window *vwin = arg;
838 if (vwin->flags != 0)
840 if (vwin->clipcount != 0)
842 if (vwin->width < 2 || vwin->width > W9966_WND_MAX_W)
844 if (vwin->height < 1 || vwin->height > W9966_WND_MAX_H)
847 // Update camera regs
848 w9966_pdev_claim(cam);
849 ret = w9966_setup(cam, 0, 0, 1023, 1023, vwin->width, vwin->height);
850 w9966_pdev_release(cam);
853 DPRINTF("VIDIOCSWIN: w9966_setup() failed.\n");
861 struct video_window *vwin = arg;
862 memset(vwin, 0, sizeof(*vwin));
863 vwin->width = cam->width;
864 vwin->height = cam->height;
883 static int w9966_v4l_ioctl(struct inode *inode, struct file *file,
884 unsigned int cmd, unsigned long arg)
886 return video_usercopy(inode, file, cmd, arg, w9966_v4l_do_ioctl);
890 static ssize_t w9966_v4l_read(struct file *file, char __user *buf,
891 size_t count, loff_t *ppos)
893 struct video_device *vdev = video_devdata(file);
894 struct w9966_dev *cam = vdev->priv;
895 unsigned char addr = 0xa0; // ECP, read, CCD-transfer, 00000
896 unsigned char __user *dest = (unsigned char __user *)buf;
897 unsigned long dleft = count;
900 // Why would anyone want more than this??
901 if (count > cam->width * cam->height * 2)
904 w9966_pdev_claim(cam);
905 w9966_wReg(cam, 0x00, 0x02); // Reset ECP-FIFO buffer
906 w9966_wReg(cam, 0x00, 0x00); // Return to normal operation
907 w9966_wReg(cam, 0x01, 0x98); // Enable capture
909 // write special capture-addr and negotiate into data transfer
911 (parport_negotiate(cam->pport, cam->ppmode|IEEE1284_ADDR) != 0 )||
912 (parport_write(cam->pport, &addr, 1) != 1 )||
913 (parport_negotiate(cam->pport, cam->ppmode|IEEE1284_DATA) != 0 )
915 w9966_pdev_release(cam);
919 tbuf = kmalloc(W9966_RBUFFER, GFP_KERNEL);
927 unsigned long tsize = (dleft > W9966_RBUFFER) ? W9966_RBUFFER : dleft;
929 if (parport_read(cam->pport, tbuf, tsize) < tsize) {
933 if (copy_to_user(dest, tbuf, tsize) != 0) {
941 w9966_wReg(cam, 0x01, 0x18); // Disable capture
945 w9966_pdev_release(cam);
951 // Called once for every parport on init
952 static void w9966_attach(struct parport *port)
956 for (i = 0; i < W9966_MAXCAMS; i++)
958 if (w9966_cams[i].dev_state != 0) // Cam is already assigned
961 strcmp(pardev[i], "aggressive") == 0 ||
962 strcmp(pardev[i], port->name) == 0
964 if (w9966_init(&w9966_cams[i], port) != 0)
965 w9966_term(&w9966_cams[i]);
971 // Called once for every parport on termination
972 static void w9966_detach(struct parport *port)
975 for (i = 0; i < W9966_MAXCAMS; i++)
976 if (w9966_cams[i].dev_state != 0 && w9966_cams[i].pport == port)
977 w9966_term(&w9966_cams[i]);
981 static struct parport_driver w9966_ppd = {
982 .name = W9966_DRIVERNAME,
983 .attach = w9966_attach,
984 .detach = w9966_detach,
987 // Module entry point
988 static int __init w9966_mod_init(void)
991 for (i = 0; i < W9966_MAXCAMS; i++)
992 w9966_cams[i].dev_state = 0;
994 return parport_register_driver(&w9966_ppd);
998 static void __exit w9966_mod_term(void)
1000 parport_unregister_driver(&w9966_ppd);
1003 module_init(w9966_mod_init);
1004 module_exit(w9966_mod_term);