- /*
- Winbond w9966cf Webcam parport driver.
- Copyright (C) 2001 Jakob Kemi <jakob.kemi@telia.com>
- 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)
- Todo:
- * Add a working EPP mode
- * Support other ccd-control chips than the saa7111
- (what combinations exists?)
- * Add proper probing. IEEE1284 probing of w9966 chips haven't
- worked since parport drivers changed in 2.4.x.
- * Probe for onboard SRAM, port directions etc. (if possible)
- 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>
- #include <linux/types.h>
- #include <linux/slab.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 {
- u8 dev_state;
- u8 i2c_state;
- int ppmode;
- struct parport* pport;
- struct pardevice* pdev;
- struct video_device vdev;
- u16 width;
- u16 height;
- u8 brightness;
- s8 contrast;
- s8 color;
- s8 hue;
- u8* buffer;
- };
- /*
- * Module specific properties
- */
- MODULE_AUTHOR("Jakob Kemi <jakob.kemi@telia.com>");
- MODULE_DESCRIPTION("Winbond w9966cf WebCam driver (FlyCam Supra and others)");
- MODULE_LICENSE("GPL");
- static const char* pardev[] = {[0 ... W9966_MAXCAMS] = "auto"};
- MODULE_PARM(pardev, "0-" __MODULE_STRING(W9966_MAXCAMS) "s");
- MODULE_PARM_DESC(pardev,"n
- <auto|name|none[,...]> Where to find cameras.n
- auto = probe all parports for cameran
- name = name of parport (eg parport0)n
- none = don't search for this cameran
- You can specify all cameras this way, for example:
- pardev=parport2,auto,none,parport0 would search for cam1 on parport2, searchn
- for cam2 on all parports, skip cam3 and search for cam4 on parport0");
- static int parmode = 0;
- MODULE_PARM(parmode, "i");
- MODULE_PARM_DESC(parmode, "n<0|1|2> 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_ECPSWE;
- break;
- case 1: // hw- or sw-ecp
- if (port->modes & PARPORT_MODE_ECP)
- cam->ppmode = IEEE1284_MODE_ECP;
- else
- cam->ppmode = IEEE1284_MODE_ECPSWE;
- break;
- case 2: // hw- or sw-epp
- if (port->modes & PARPORT_MODE_EPP)
- cam->ppmode = IEEE1284_MODE_EPP;
- else
- cam->ppmode = IEEE1284_MODE_EPPSWE;
- 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() failedn");
- 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);
- cam->buffer = NULL;
- // 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)
- {
- // Delete allocated buffer if needed
- if (cam->buffer != NULL) {
- kfree(cam->buffer);
- cam->buffer = NULL;
- }
- // 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;
- u8 scale_x, scale_y;
- u8 regs[0x1c];
- u8 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)
- {
- struct w9966_dev *cam = (struct w9966_dev*)vdev->priv;
- cam->buffer = (u8*)kmalloc(W9966_RBUFFER, GFP_KERNEL);
- if (cam->buffer == NULL)
- return -EFAULT;
- return 0;
- }
- static void w9966_v4l_close(struct video_device *vdev)
- {
- struct w9966_dev *cam = (struct w9966_dev*)vdev->priv;
- if (cam->buffer != NULL) {
- kfree(cam->buffer);
- cam->buffer = NULL;
- }
- }
- 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;
- if (parport_read(cam->pport, cam->buffer, tsize) < tsize) {
- w9966_pdev_release(cam);
- return -EFAULT;
- }
- if (copy_to_user(dest, cam->buffer, 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 (strcmp(pardev[i], "none") == 0) // Skip if 'none'
- continue;
- if (w9966_cams[i].dev_state != 0) // Cam is already assigned
- continue;
- if (strcmp(pardev[i], "auto") == 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);