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Diffstat (limited to 'drivers/media/video/w9966.c')
| -rw-r--r-- | drivers/media/video/w9966.c | 996 |
1 files changed, 0 insertions, 996 deletions
diff --git a/drivers/media/video/w9966.c b/drivers/media/video/w9966.c deleted file mode 100644 index 038ff32b01b..00000000000 --- a/drivers/media/video/w9966.c +++ /dev/null @@ -1,996 +0,0 @@ -/* - Winbond w9966cf Webcam parport driver. - - 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/videodev2.h> -#include <media/v4l2-common.h> -#include <media/v4l2-ioctl.h> -#include <linux/parport.h> - -/*#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_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; - unsigned long in_use; -}; - -/* - * Module specific properties - */ - -MODULE_AUTHOR("Jakob Kemi <jakob.kemi@post.utfors.se>"); -MODULE_DESCRIPTION("Winbond w9966cf WebCam driver (0.32)"); -MODULE_LICENSE("GPL"); - - -#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); - -/* - * 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); -#if 0 -static int w9966_rReg_i2c(struct w9966_dev* cam, int reg); -#endif -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); -#if 0 -static int w9966_i2c_rbyte(struct w9966_dev* cam); -#endif - -static long w9966_v4l_ioctl(struct file *file, - unsigned int cmd, unsigned long arg); -static ssize_t w9966_v4l_read(struct file *file, char __user *buf, - size_t count, loff_t *ppos); - -static int w9966_exclusive_open(struct file *file) -{ - struct w9966_dev *cam = video_drvdata(file); - - return test_and_set_bit(0, &cam->in_use) ? -EBUSY : 0; -} - -static int w9966_exclusive_release(struct file *file) -{ - struct w9966_dev *cam = video_drvdata(file); - - clear_bit(0, &cam->in_use); - return 0; -} - -static const struct v4l2_file_operations w9966_fops = { - .owner = THIS_MODULE, - .open = w9966_exclusive_open, - .release = w9966_exclusive_release, - .ioctl = w9966_v4l_ioctl, - .read = w9966_v4l_read, -}; -static struct video_device w9966_template = { - .name = W9966_DRIVERNAME, - .fops = &w9966_fops, - .release = video_device_release_empty, -}; - -/* - * 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 - memcpy(&cam->vdev, &w9966_template, sizeof(struct video_device)); - video_set_drvdata(&cam->vdev, cam); - - if (video_register_device(&cam->vdev, VFL_TYPE_GRABBER, video_nr) < 0) - 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); -} - -// Get peripheral clock line -// Expects a claimed pdev. -static inline int w9966_i2c_getscl(struct w9966_dev* cam) -{ - const unsigned char state = w9966_rReg(cam, 0x18); - return ((state & W9966_I2C_R_CLOCK) > 0); -} - -// Sets the clock line on the i2c bus. -// Expects a claimed pdev. -1 on error -static inline int w9966_i2c_setscl(struct w9966_dev* cam, int state) -{ - unsigned long timeout; - - if (state) - cam->i2c_state |= W9966_I2C_W_CLOCK; - else - cam->i2c_state &= ~W9966_I2C_W_CLOCK; - - w9966_wReg(cam, 0x18, cam->i2c_state); - udelay(5); - - // we go to high, we also expect the peripheral to ack. - if (state) { - timeout = jiffies + 100; - while (!w9966_i2c_getscl(cam)) { - if (time_after(jiffies, timeout)) - return -1; - } - } - return 0; -} - -// Get peripheral data line -// Expects a claimed pdev. -static inline int w9966_i2c_getsda(struct w9966_dev* cam) -{ - const unsigned char state = w9966_rReg(cam, 0x18); - return ((state & W9966_I2C_R_DATA) > 0); -} - -// Write a byte with ack to the i2c bus. -// Expects a claimed pdev. -1 on error -static int w9966_i2c_wbyte(struct w9966_dev* cam, int data) -{ - int i; - for (i = 7; i >= 0; i--) - { - w9966_i2c_setsda(cam, (data >> i) & 0x01); - - if (w9966_i2c_setscl(cam, 1) == -1) - return -1; - w9966_i2c_setscl(cam, 0); - } - - w9966_i2c_setsda(cam, 1); - - if (w9966_i2c_setscl(cam, 1) == -1) - return -1; - w9966_i2c_setscl(cam, 0); - - return 0; -} - -// Read a data byte with ack from the i2c-bus -// Expects a claimed pdev. -1 on error -#if 0 -static int w9966_i2c_rbyte(struct w9966_dev* cam) -{ - unsigned char data = 0x00; - int i; - - w9966_i2c_setsda(cam, 1); - - for (i = 0; i < 8; i++) - { - if (w9966_i2c_setscl(cam, 1) == -1) - return -1; - data = data << 1; - if (w9966_i2c_getsda(cam)) - data |= 0x01; - - w9966_i2c_setscl(cam, 0); - } - return data; -} -#endif - -// Read a register from the i2c device. -// Expects claimed pdev. -1 on error -#if 0 -static int w9966_rReg_i2c(struct w9966_dev* cam, int reg) -{ - int data; - - w9966_i2c_setsda(cam, 0); - w9966_i2c_setscl(cam, 0); - - if ( - w9966_i2c_wbyte(cam, W9966_I2C_W_ID) == -1 || - w9966_i2c_wbyte(cam, reg) == -1 - ) - return -1; - - w9966_i2c_setsda(cam, 1); - if (w9966_i2c_setscl(cam, 1) == -1) - return -1; - w9966_i2c_setsda(cam, 0); - w9966_i2c_setscl(cam, 0); - - if ( - w9966_i2c_wbyte(cam, W9966_I2C_R_ID) == -1 || - (data = w9966_i2c_rbyte(cam)) == -1 - ) - return -1; - - w9966_i2c_setsda(cam, 0); - - if (w9966_i2c_setscl(cam, 1) == -1) - return -1; - w9966_i2c_setsda(cam, 1); - - return data; -} -#endif - -// Write a register to the i2c device. -// Expects claimed pdev. -1 on error -static int w9966_wReg_i2c(struct w9966_dev* cam, int reg, int data) -{ - w9966_i2c_setsda(cam, 0); - w9966_i2c_setscl(cam, 0); - - if ( - w9966_i2c_wbyte(cam, W9966_I2C_W_ID) == -1 || - w9966_i2c_wbyte(cam, reg) == -1 || - w9966_i2c_wbyte(cam, data) == -1 - ) - return -1; - - w9966_i2c_setsda(cam, 0); - if (w9966_i2c_setscl(cam, 1) == -1) - return -1; - - w9966_i2c_setsda(cam, 1); - - return 0; -} - -/* - * Video4linux interfacing - */ - -static long w9966_v4l_do_ioctl(struct file *file, unsigned int cmd, void *arg) -{ - struct w9966_dev *cam = video_drvdata(file); - - switch(cmd) - { - case VIDIOCGCAP: - { - static struct video_capability vcap = { - .name = W9966_DRIVERNAME, - .type = VID_TYPE_CAPTURE | VID_TYPE_SCALES, - .channels = 1, - .maxwidth = W9966_WND_MAX_W, - .maxheight = W9966_WND_MAX_H, - .minwidth = 2, - .minheight = 1, - }; - struct video_capability *cap = arg; - *cap = vcap; - return 0; - } - case VIDIOCGCHAN: - { - struct video_channel *vch = arg; - if(vch->channel != 0) // We only support one channel (#0) - return -EINVAL; - memset(vch,0,sizeof(*vch)); - strcpy(vch->name, "CCD-input"); - vch->type = VIDEO_TYPE_CAMERA; - return 0; - } - case VIDIOCSCHAN: - { - struct video_channel *vch = arg; - if(vch->channel != 0) - return -EINVAL; - return 0; - } - case VIDIOCGTUNER: - { - struct video_tuner *vtune = arg; - if(vtune->tuner != 0) - return -EINVAL; - strcpy(vtune->name, "no tuner"); - vtune->rangelow = 0; - vtune->rangehigh = 0; - vtune->flags = VIDEO_TUNER_NORM; - vtune->mode = VIDEO_MODE_AUTO; - vtune->signal = 0xffff; - return 0; - } - case VIDIOCSTUNER: - { - struct video_tuner *vtune = arg; - if (vtune->tuner != 0) - return -EINVAL; - if (vtune->mode != VIDEO_MODE_AUTO) - return -EINVAL; - return 0; - } - case VIDIOCGPICT: - { - struct video_picture vpic = { - cam->brightness << 8, // brightness - (cam->hue + 128) << 8, // hue - cam->color << 9, // color - cam->contrast << 9, // contrast - 0x8000, // whiteness - 16, VIDEO_PALETTE_YUV422// bpp, palette format - }; - struct video_picture *pic = arg; - *pic = vpic; - return 0; - } - case VIDIOCSPICT: - { - struct video_picture *vpic = arg; - if (vpic->depth != 16 || (vpic->palette != VIDEO_PALETTE_YUV422 && vpic->palette != VIDEO_PALETTE_YUYV)) - return -EINVAL; - - cam->brightness = vpic->brightness >> 8; - cam->hue = (vpic->hue >> 8) - 128; - cam->color = vpic->colour >> 9; - cam->contrast = vpic->contrast >> 9; - - w9966_pdev_claim(cam); - - if ( - w9966_wReg_i2c(cam, 0x0a, cam->brightness) == -1 || - w9966_wReg_i2c(cam, 0x0b, cam->contrast) == -1 || - w9966_wReg_i2c(cam, 0x0c, cam->color) == -1 || - w9966_wReg_i2c(cam, 0x0d, cam->hue) == -1 - ) { - w9966_pdev_release(cam); - return -EIO; - } - - w9966_pdev_release(cam); - return 0; - } - case VIDIOCSWIN: - { - int ret; - struct video_window *vwin = arg; - - if (vwin->flags != 0) - return -EINVAL; - if (vwin->clipcount != 0) - return -EINVAL; - if (vwin->width < 2 || vwin->width > W9966_WND_MAX_W) - return -EINVAL; - if (vwin->height < 1 || vwin->height > W9966_WND_MAX_H) - return -EINVAL; - - // Update camera regs - w9966_pdev_claim(cam); - ret = w9966_setup(cam, 0, 0, 1023, 1023, vwin->width, vwin->height); - w9966_pdev_release(cam); - - if (ret != 0) { - DPRINTF("VIDIOCSWIN: w9966_setup() failed.\n"); - return -EIO; - } - - return 0; - } - case VIDIOCGWIN: - { - struct video_window *vwin = arg; - memset(vwin, 0, sizeof(*vwin)); - vwin->width = cam->width; - vwin->height = cam->height; - return 0; - } - // Unimplemented - case VIDIOCCAPTURE: - case VIDIOCGFBUF: - case VIDIOCSFBUF: - case VIDIOCKEY: - case VIDIOCGFREQ: - case VIDIOCSFREQ: - case VIDIOCGAUDIO: - case VIDIOCSAUDIO: - return -EINVAL; - default: - return -ENOIOCTLCMD; - } - return 0; -} - -static long w9966_v4l_ioctl(struct file *file, - unsigned int cmd, unsigned long arg) -{ - return video_usercopy(file, cmd, arg, w9966_v4l_do_ioctl); -} - -// Capture data -static ssize_t w9966_v4l_read(struct file *file, char __user *buf, - size_t count, loff_t *ppos) -{ - struct w9966_dev *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; - - w9966_pdev_claim(cam); - w9966_wReg(cam, 0x00, 0x02); // Reset ECP-FIFO buffer - w9966_wReg(cam, 0x00, 0x00); // Return to normal operation - w9966_wReg(cam, 0x01, 0x98); // Enable capture - - // write special capture-addr and negotiate into data transfer - if ( - (parport_negotiate(cam->pport, cam->ppmode|IEEE1284_ADDR) != 0 )|| - (parport_write(cam->pport, &addr, 1) != 1 )|| - (parport_negotiate(cam->pport, cam->ppmode|IEEE1284_DATA) != 0 ) - ) { - w9966_pdev_release(cam); - return -EFAULT; - } - - tbuf = kmalloc(W9966_RBUFFER, GFP_KERNEL); - if (tbuf == NULL) { - count = -ENOMEM; - goto out; - } - - while(dleft > 0) - { - unsigned long tsize = (dleft > W9966_RBUFFER) ? W9966_RBUFFER : dleft; - - if (parport_read(cam->pport, tbuf, tsize) < tsize) { - count = -EFAULT; - goto out; - } - if (copy_to_user(dest, tbuf, tsize) != 0) { - count = -EFAULT; - goto out; - } - dest += tsize; - dleft -= tsize; - } - - w9966_wReg(cam, 0x01, 0x18); // Disable capture - -out: - kfree(tbuf); - w9966_pdev_release(cam); - - return count; -} - - -// Called once for every parport on init -static void w9966_attach(struct parport *port) -{ - int i; - - for (i = 0; i < W9966_MAXCAMS; i++) - { - if (w9966_cams[i].dev_state != 0) // Cam is already assigned - continue; - if ( - strcmp(pardev[i], "aggressive") == 0 || - strcmp(pardev[i], port->name) == 0 - ) { - if (w9966_init(&w9966_cams[i], port) != 0) - w9966_term(&w9966_cams[i]); - break; // return - } - } -} - -// Called once for every parport on termination -static void w9966_detach(struct parport *port) -{ - int i; - for (i = 0; i < W9966_MAXCAMS; i++) - if (w9966_cams[i].dev_state != 0 && w9966_cams[i].pport == port) - w9966_term(&w9966_cams[i]); -} - - -static struct parport_driver w9966_ppd = { - .name = W9966_DRIVERNAME, - .attach = w9966_attach, - .detach = w9966_detach, -}; - -// Module entry point -static int __init w9966_mod_init(void) -{ - int i; - for (i = 0; i < W9966_MAXCAMS; i++) - w9966_cams[i].dev_state = 0; - - return parport_register_driver(&w9966_ppd); -} - -// Module cleanup -static void __exit w9966_mod_term(void) -{ - parport_unregister_driver(&w9966_ppd); -} - -module_init(w9966_mod_init); -module_exit(w9966_mod_term); |