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linux-next/drivers/media/video/stv680.c
Arjan van de Ven fa027c2a0a [PATCH] mark struct file_operations const 4 
Many struct file_operations in the kernel can be "const".  Marking them const
moves these to the .rodata section, which avoids false sharing with potential
dirty data.  In addition it'll catch accidental writes at compile time to
these shared resources.

[akpm@sdl.org: dvb fix]
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-02-12 09:48:45 -08:00

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/*
* STV0680 USB Camera Driver, by Kevin Sisson (kjsisson@bellsouth.net)
*
* Thanks to STMicroelectronics for information on the usb commands, and
* to Steve Miller at STM for his help and encouragement while I was
* writing this driver.
*
* This driver is based heavily on the
* Endpoints (formerly known as AOX) se401 USB Camera Driver
* Copyright (c) 2000 Jeroen B. Vreeken (pe1rxq@amsat.org)
*
* Still somewhat based on the Linux ov511 driver.
*
* 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.
*
* History:
* ver 0.1 October, 2001. Initial attempt.
*
* ver 0.2 November, 2001. Fixed asbility to resize, added brightness
* function, made more stable (?)
*
* ver 0.21 Nov, 2001. Added gamma correction and white balance,
* due to Alexander Schwartz. Still trying to
* improve stablility. Moved stuff into stv680.h
*
* ver 0.22 Nov, 2001. Added sharpen function (by Michael Sweet,
* mike@easysw.com) from GIMP, also used in pencam.
* Simple, fast, good integer math routine.
*
* ver 0.23 Dec, 2001 (gkh)
* Took out sharpen function, ran code through
* Lindent, and did other minor tweaks to get
* things to work properly with 2.5.1
*
* ver 0.24 Jan, 2002 (kjs)
* Fixed the problem with webcam crashing after
* two pictures. Changed the way pic is halved to
* improve quality. Got rid of green line around
* frame. Fix brightness reset when changing size
* bug. Adjusted gamma filters slightly.
*
* ver 0.25 Jan, 2002 (kjs)
* Fixed a bug in which the driver sometimes attempted
* to set to a non-supported size. This allowed
* gnomemeeting to work.
* Fixed proc entry removal bug.
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/vmalloc.h>
#include <linux/slab.h>
#include <linux/pagemap.h>
#include <linux/errno.h>
#include <linux/videodev.h>
#include <media/v4l2-common.h>
#include <linux/usb.h>
#include <linux/mutex.h>
#include "stv680.h"
static int video_nr = -1;
static int swapRGB = 0; /* default for auto sleect */
static int swapRGB_on = 0; /* default to allow auto select; -1=swap never, +1= swap always */
static unsigned int debug = 0;
#define PDEBUG(level, fmt, args...) \
do { \
if (debug >= level) \
info("[%s:%d] " fmt, __FUNCTION__, __LINE__ , ## args); \
} while (0)
/*
* Version Information
*/
#define DRIVER_VERSION "v0.25"
#define DRIVER_AUTHOR "Kevin Sisson <kjsisson@bellsouth.net>"
#define DRIVER_DESC "STV0680 USB Camera Driver"
MODULE_AUTHOR (DRIVER_AUTHOR);
MODULE_DESCRIPTION (DRIVER_DESC);
MODULE_LICENSE ("GPL");
module_param(debug, int, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC (debug, "Debug enabled or not");
module_param(swapRGB_on, int, 0);
MODULE_PARM_DESC (swapRGB_on, "Red/blue swap: 1=always, 0=auto, -1=never");
module_param(video_nr, int, 0);
/********************************************************************
*
* Memory management
*
* This is a shameless copy from the USB-cpia driver (linux kernel
* version 2.3.29 or so, I have no idea what this code actually does ;).
* Actually it seems to be a copy of a shameless copy of the bttv-driver.
* Or that is a copy of a shameless copy of ... (To the powers: is there
* no generic kernel-function to do this sort of stuff?)
*
* Yes, it was a shameless copy from the bttv-driver. IIRC, Alan says
* there will be one, but apparentely not yet -jerdfelt
*
* So I copied it again for the ov511 driver -claudio
*
* Same for the se401 driver -Jeroen
*
* And the STV0680 driver - Kevin
********************************************************************/
static void *rvmalloc (unsigned long size)
{
void *mem;
unsigned long adr;
size = PAGE_ALIGN(size);
mem = vmalloc_32 (size);
if (!mem)
return NULL;
memset (mem, 0, size); /* Clear the ram out, no junk to the user */
adr = (unsigned long) mem;
while (size > 0) {
SetPageReserved(vmalloc_to_page((void *)adr));
adr += PAGE_SIZE;
size -= PAGE_SIZE;
}
return mem;
}
static void rvfree (void *mem, unsigned long size)
{
unsigned long adr;
if (!mem)
return;
adr = (unsigned long) mem;
while ((long) size > 0) {
ClearPageReserved(vmalloc_to_page((void *)adr));
adr += PAGE_SIZE;
size -= PAGE_SIZE;
}
vfree (mem);
}
/*********************************************************************
* pencam read/write functions
********************************************************************/
static int stv_sndctrl (int set, struct usb_stv *stv680, unsigned short req, unsigned short value, unsigned char *buffer, int size)
{
int ret = -1;
switch (set) {
case 0: /* 0xc1 */
ret = usb_control_msg (stv680->udev,
usb_rcvctrlpipe (stv680->udev, 0),
req,
(USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT),
value, 0, buffer, size, PENCAM_TIMEOUT);
break;
case 1: /* 0x41 */
ret = usb_control_msg (stv680->udev,
usb_sndctrlpipe (stv680->udev, 0),
req,
(USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT),
value, 0, buffer, size, PENCAM_TIMEOUT);
break;
case 2: /* 0x80 */
ret = usb_control_msg (stv680->udev,
usb_rcvctrlpipe (stv680->udev, 0),
req,
(USB_DIR_IN | USB_RECIP_DEVICE),
value, 0, buffer, size, PENCAM_TIMEOUT);
break;
case 3: /* 0x40 */
ret = usb_control_msg (stv680->udev,
usb_sndctrlpipe (stv680->udev, 0),
req,
(USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE),
value, 0, buffer, size, PENCAM_TIMEOUT);
break;
}
if ((ret < 0) && (req != 0x0a)) {
PDEBUG (1, "STV(e): usb_control_msg error %i, request = 0x%x, error = %i", set, req, ret);
}
return ret;
}
static int stv_set_config (struct usb_stv *dev, int configuration, int interface, int alternate)
{
if (configuration != dev->udev->actconfig->desc.bConfigurationValue
|| usb_reset_configuration (dev->udev) < 0) {
PDEBUG (1, "STV(e): FAILED to reset configuration %i", configuration);
return -1;
}
if (usb_set_interface (dev->udev, interface, alternate) < 0) {
PDEBUG (1, "STV(e): FAILED to set alternate interface %i", alternate);
return -1;
}
return 0;
}
static int stv_stop_video (struct usb_stv *dev)
{
int i;
unsigned char *buf;
buf = kmalloc (40, GFP_KERNEL);
if (buf == NULL) {
PDEBUG (0, "STV(e): Out of (small buf) memory");
return -1;
}
/* this is a high priority command; it stops all lower order commands */
if ((i = stv_sndctrl (1, dev, 0x04, 0x0000, buf, 0x0)) < 0) {
i = stv_sndctrl (0, dev, 0x80, 0, buf, 0x02); /* Get Last Error; 2 = busy */
PDEBUG (1, "STV(i): last error: %i, command = 0x%x", buf[0], buf[1]);
} else {
PDEBUG (1, "STV(i): Camera reset to idle mode.");
}
if ((i = stv_set_config (dev, 1, 0, 0)) < 0)
PDEBUG (1, "STV(e): Reset config during exit failed");
/* get current mode */
buf[0] = 0xf0;
if ((i = stv_sndctrl (0, dev, 0x87, 0, buf, 0x08)) != 0x08) /* get mode */
PDEBUG (0, "STV(e): Stop_video: problem setting original mode");
if (dev->origMode != buf[0]) {
memset (buf, 0, 8);
buf[0] = (unsigned char) dev->origMode;
if ((i = stv_sndctrl (3, dev, 0x07, 0x0100, buf, 0x08)) != 0x08) {
PDEBUG (0, "STV(e): Stop_video: Set_Camera_Mode failed");
i = -1;
}
buf[0] = 0xf0;
i = stv_sndctrl (0, dev, 0x87, 0, buf, 0x08);
if ((i != 0x08) || (buf[0] != dev->origMode)) {
PDEBUG (0, "STV(e): camera NOT set to original resolution.");
i = -1;
} else
PDEBUG (0, "STV(i): Camera set to original resolution");
}
/* origMode */
kfree(buf);
return i;
}
static int stv_set_video_mode (struct usb_stv *dev)
{
int i, stop_video = 1;
unsigned char *buf;
buf = kmalloc (40, GFP_KERNEL);
if (buf == NULL) {
PDEBUG (0, "STV(e): Out of (small buf) memory");
return -1;
}
if ((i = stv_set_config (dev, 1, 0, 0)) < 0) {
kfree(buf);
return i;
}
i = stv_sndctrl (2, dev, 0x06, 0x0100, buf, 0x12);
if (!(i > 0) && (buf[8] == 0x53) && (buf[9] == 0x05)) {
PDEBUG (1, "STV(e): Could not get descriptor 0100.");
goto error;
}
/* set alternate interface 1 */
if ((i = stv_set_config (dev, 1, 0, 1)) < 0)
goto error;
if ((i = stv_sndctrl (0, dev, 0x85, 0, buf, 0x10)) != 0x10)
goto error;
PDEBUG (1, "STV(i): Setting video mode.");
/* Switch to Video mode: 0x0100 = VGA (640x480), 0x0000 = CIF (352x288) 0x0300 = QVGA (320x240) */
if ((i = stv_sndctrl (1, dev, 0x09, dev->VideoMode, buf, 0x0)) < 0) {
stop_video = 0;
goto error;
}
goto exit;
error:
kfree(buf);
if (stop_video == 1)
stv_stop_video (dev);
return -1;
exit:
kfree(buf);
return 0;
}
static int stv_init (struct usb_stv *stv680)
{
int i = 0;
unsigned char *buffer;
unsigned long int bufsize;
buffer = kzalloc (40, GFP_KERNEL);
if (buffer == NULL) {
PDEBUG (0, "STV(e): Out of (small buf) memory");
return -1;
}
udelay (100);
/* set config 1, interface 0, alternate 0 */
if ((i = stv_set_config (stv680, 1, 0, 0)) < 0) {
kfree(buffer);
PDEBUG (0, "STV(e): set config 1,0,0 failed");
return -1;
}
/* ping camera to be sure STV0680 is present */
if ((i = stv_sndctrl (0, stv680, 0x88, 0x5678, buffer, 0x02)) != 0x02)
goto error;
if ((buffer[0] != 0x56) || (buffer[1] != 0x78)) {
PDEBUG (1, "STV(e): camera ping failed!!");
goto error;
}
/* get camera descriptor */
if ((i = stv_sndctrl (2, stv680, 0x06, 0x0200, buffer, 0x09)) != 0x09)
goto error;
i = stv_sndctrl (2, stv680, 0x06, 0x0200, buffer, 0x22);
if (!(i >= 0) && (buffer[7] == 0xa0) && (buffer[8] == 0x23)) {
PDEBUG (1, "STV(e): Could not get descriptor 0200.");
goto error;
}
if ((i = stv_sndctrl (0, stv680, 0x8a, 0, buffer, 0x02)) != 0x02)
goto error;
if ((i = stv_sndctrl (0, stv680, 0x8b, 0, buffer, 0x24)) != 0x24)
goto error;
if ((i = stv_sndctrl (0, stv680, 0x85, 0, buffer, 0x10)) != 0x10)
goto error;
stv680->SupportedModes = buffer[7];
i = stv680->SupportedModes;
stv680->CIF = 0;
stv680->VGA = 0;
stv680->QVGA = 0;
if (i & 1)
stv680->CIF = 1;
if (i & 2)
stv680->VGA = 1;
if (i & 8)
stv680->QVGA = 1;
if (stv680->SupportedModes == 0) {
PDEBUG (0, "STV(e): There are NO supported STV680 modes!!");
i = -1;
goto error;
} else {
if (stv680->CIF)
PDEBUG (0, "STV(i): CIF is supported");
if (stv680->QVGA)
PDEBUG (0, "STV(i): QVGA is supported");
}
/* FW rev, ASIC rev, sensor ID */
PDEBUG (1, "STV(i): Firmware rev is %i.%i", buffer[0], buffer[1]);
PDEBUG (1, "STV(i): ASIC rev is %i.%i", buffer[2], buffer[3]);
PDEBUG (1, "STV(i): Sensor ID is %i", (buffer[4]*16) + (buffer[5]>>4));
/* set alternate interface 1 */
if ((i = stv_set_config (stv680, 1, 0, 1)) < 0)
goto error;
if ((i = stv_sndctrl (0, stv680, 0x85, 0, buffer, 0x10)) != 0x10)
goto error;
if ((i = stv_sndctrl (0, stv680, 0x8d, 0, buffer, 0x08)) != 0x08)
goto error;
i = buffer[3];
PDEBUG (0, "STV(i): Camera has %i pictures.", i);
/* get current mode */
if ((i = stv_sndctrl (0, stv680, 0x87, 0, buffer, 0x08)) != 0x08)
goto error;
stv680->origMode = buffer[0]; /* 01 = VGA, 03 = QVGA, 00 = CIF */
/* This will attemp CIF mode, if supported. If not, set to QVGA */
memset (buffer, 0, 8);
if (stv680->CIF)
buffer[0] = 0x00;
else if (stv680->QVGA)
buffer[0] = 0x03;
if ((i = stv_sndctrl (3, stv680, 0x07, 0x0100, buffer, 0x08)) != 0x08) {
PDEBUG (0, "STV(i): Set_Camera_Mode failed");
i = -1;
goto error;
}
buffer[0] = 0xf0;
stv_sndctrl (0, stv680, 0x87, 0, buffer, 0x08);
if (((stv680->CIF == 1) && (buffer[0] != 0x00)) || ((stv680->QVGA == 1) && (buffer[0] != 0x03))) {
PDEBUG (0, "STV(e): Error setting camera video mode!");
i = -1;
goto error;
} else {
if (buffer[0] == 0) {
stv680->VideoMode = 0x0000;
PDEBUG (0, "STV(i): Video Mode set to CIF");
}
if (buffer[0] == 0x03) {
stv680->VideoMode = 0x0300;
PDEBUG (0, "STV(i): Video Mode set to QVGA");
}
}
if ((i = stv_sndctrl (0, stv680, 0x8f, 0, buffer, 0x10)) != 0x10)
goto error;
bufsize = (buffer[0] << 24) | (buffer[1] << 16) | (buffer[2] << 8) | (buffer[3]);
stv680->cwidth = (buffer[4] << 8) | (buffer[5]); /* ->camera = 322, 356, 644 */
stv680->cheight = (buffer[6] << 8) | (buffer[7]); /* ->camera = 242, 292, 484 */
stv680->origGain = buffer[12];
goto exit;
error:
i = stv_sndctrl (0, stv680, 0x80, 0, buffer, 0x02); /* Get Last Error */
PDEBUG (1, "STV(i): last error: %i, command = 0x%x", buffer[0], buffer[1]);
kfree(buffer);
return -1;
exit:
kfree(buffer);
/* video = 320x240, 352x288 */
if (stv680->CIF == 1) {
stv680->maxwidth = 352;
stv680->maxheight = 288;
stv680->vwidth = 352;
stv680->vheight = 288;
}
if (stv680->QVGA == 1) {
stv680->maxwidth = 320;
stv680->maxheight = 240;
stv680->vwidth = 320;
stv680->vheight = 240;
}
stv680->rawbufsize = bufsize; /* must be ./. by 8 */
stv680->maxframesize = bufsize * 3; /* RGB size */
PDEBUG (2, "STV(i): cwidth = %i, cheight = %i", stv680->cwidth, stv680->cheight);
PDEBUG (1, "STV(i): width = %i, height = %i, rawbufsize = %li", stv680->vwidth, stv680->vheight, stv680->rawbufsize);
/* some default values */
stv680->bulk_in_endpointAddr = 0x82;
stv680->dropped = 0;
stv680->error = 0;
stv680->framecount = 0;
stv680->readcount = 0;
stv680->streaming = 0;
/* bright, white, colour, hue, contrast are set by software, not in stv0680 */
stv680->brightness = 32767;
stv680->chgbright = 0;
stv680->whiteness = 0; /* only for greyscale */
stv680->colour = 32767;
stv680->contrast = 32767;
stv680->hue = 32767;
stv680->palette = STV_VIDEO_PALETTE;
stv680->depth = 24; /* rgb24 bits */
if ((swapRGB_on == 0) && (swapRGB == 0))
PDEBUG (1, "STV(i): swapRGB is (auto) OFF");
else if ((swapRGB_on == 0) && (swapRGB == 1))
PDEBUG (1, "STV(i): swapRGB is (auto) ON");
else if (swapRGB_on == 1)
PDEBUG (1, "STV(i): swapRGB is (forced) ON");
else if (swapRGB_on == -1)
PDEBUG (1, "STV(i): swapRGB is (forced) OFF");
if (stv_set_video_mode (stv680) < 0) {
PDEBUG (0, "STV(e): Could not set video mode in stv_init");
return -1;
}
return 0;
}
/***************** last of pencam routines *******************/
/****************************************************************************
* sysfs
***************************************************************************/
#define stv680_file(name, variable, field) \
static ssize_t show_##name(struct class_device *class_dev, char *buf) \
{ \
struct video_device *vdev = to_video_device(class_dev); \
struct usb_stv *stv = video_get_drvdata(vdev); \
return sprintf(buf, field, stv->variable); \
} \
static CLASS_DEVICE_ATTR(name, S_IRUGO, show_##name, NULL);
stv680_file(model, camera_name, "%s\n");
stv680_file(in_use, user, "%d\n");
stv680_file(streaming, streaming, "%d\n");
stv680_file(palette, palette, "%i\n");
stv680_file(frames_total, readcount, "%d\n");
stv680_file(frames_read, framecount, "%d\n");
stv680_file(packets_dropped, dropped, "%d\n");
stv680_file(decoding_errors, error, "%d\n");
static int stv680_create_sysfs_files(struct video_device *vdev)
{
int rc;
rc = video_device_create_file(vdev, &class_device_attr_model);
if (rc) goto err;
rc = video_device_create_file(vdev, &class_device_attr_in_use);
if (rc) goto err_model;
rc = video_device_create_file(vdev, &class_device_attr_streaming);
if (rc) goto err_inuse;
rc = video_device_create_file(vdev, &class_device_attr_palette);
if (rc) goto err_stream;
rc = video_device_create_file(vdev, &class_device_attr_frames_total);
if (rc) goto err_pal;
rc = video_device_create_file(vdev, &class_device_attr_frames_read);
if (rc) goto err_framtot;
rc = video_device_create_file(vdev, &class_device_attr_packets_dropped);
if (rc) goto err_framread;
rc = video_device_create_file(vdev, &class_device_attr_decoding_errors);
if (rc) goto err_dropped;
return 0;
err_dropped:
video_device_remove_file(vdev, &class_device_attr_packets_dropped);
err_framread:
video_device_remove_file(vdev, &class_device_attr_frames_read);
err_framtot:
video_device_remove_file(vdev, &class_device_attr_frames_total);
err_pal:
video_device_remove_file(vdev, &class_device_attr_palette);
err_stream:
video_device_remove_file(vdev, &class_device_attr_streaming);
err_inuse:
video_device_remove_file(vdev, &class_device_attr_in_use);
err_model:
video_device_remove_file(vdev, &class_device_attr_model);
err:
return rc;
}
static void stv680_remove_sysfs_files(struct video_device *vdev)
{
video_device_remove_file(vdev, &class_device_attr_model);
video_device_remove_file(vdev, &class_device_attr_in_use);
video_device_remove_file(vdev, &class_device_attr_streaming);
video_device_remove_file(vdev, &class_device_attr_palette);
video_device_remove_file(vdev, &class_device_attr_frames_total);
video_device_remove_file(vdev, &class_device_attr_frames_read);
video_device_remove_file(vdev, &class_device_attr_packets_dropped);
video_device_remove_file(vdev, &class_device_attr_decoding_errors);
}
/********************************************************************
* Camera control
*******************************************************************/
static int stv680_get_pict (struct usb_stv *stv680, struct video_picture *p)
{
/* This sets values for v4l interface. max/min = 65535/0 */
p->brightness = stv680->brightness;
p->whiteness = stv680->whiteness; /* greyscale */
p->colour = stv680->colour;
p->contrast = stv680->contrast;
p->hue = stv680->hue;
p->palette = stv680->palette;
p->depth = stv680->depth;
return 0;
}
static int stv680_set_pict (struct usb_stv *stv680, struct video_picture *p)
{
/* See above stv680_get_pict */
if (p->palette != STV_VIDEO_PALETTE) {
PDEBUG (2, "STV(e): Palette set error in _set_pic");
return 1;
}
if (stv680->brightness != p->brightness) {
stv680->chgbright = 1;
stv680->brightness = p->brightness;
}
stv680->whiteness = p->whiteness; /* greyscale */
stv680->colour = p->colour;
stv680->contrast = p->contrast;
stv680->hue = p->hue;
stv680->palette = p->palette;
stv680->depth = p->depth;
return 0;
}
static void stv680_video_irq (struct urb *urb)
{
struct usb_stv *stv680 = urb->context;
int length = urb->actual_length;
if (length < stv680->rawbufsize)
PDEBUG (2, "STV(i): Lost data in transfer: exp %li, got %i", stv680->rawbufsize, length);
/* ohoh... */
if (!stv680->streaming)
return;
if (!stv680->udev) {
PDEBUG (0, "STV(e): device vapourished in video_irq");
return;
}
/* 0 sized packets happen if we are to fast, but sometimes the camera
keeps sending them forever...
*/
if (length && !urb->status) {
stv680->nullpackets = 0;
switch (stv680->scratch[stv680->scratch_next].state) {
case BUFFER_READY:
case BUFFER_BUSY:
stv680->dropped++;
break;
case BUFFER_UNUSED:
memcpy (stv680->scratch[stv680->scratch_next].data,
(unsigned char *) urb->transfer_buffer, length);
stv680->scratch[stv680->scratch_next].state = BUFFER_READY;
stv680->scratch[stv680->scratch_next].length = length;
if (waitqueue_active (&stv680->wq)) {
wake_up_interruptible (&stv680->wq);
}
stv680->scratch_overflow = 0;
stv680->scratch_next++;
if (stv680->scratch_next >= STV680_NUMSCRATCH)
stv680->scratch_next = 0;
break;
} /* switch */
} else {
stv680->nullpackets++;
if (stv680->nullpackets > STV680_MAX_NULLPACKETS) {
if (waitqueue_active (&stv680->wq)) {
wake_up_interruptible (&stv680->wq);
}
}
} /* if - else */
/* Resubmit urb for new data */
urb->status = 0;
urb->dev = stv680->udev;
if (usb_submit_urb (urb, GFP_ATOMIC))
PDEBUG (0, "STV(e): urb burned down in video irq");
return;
} /* _video_irq */
static int stv680_start_stream (struct usb_stv *stv680)
{
struct urb *urb;
int err = 0, i;
stv680->streaming = 1;
/* Do some memory allocation */
for (i = 0; i < STV680_NUMFRAMES; i++) {
stv680->frame[i].data = stv680->fbuf + i * stv680->maxframesize;
stv680->frame[i].curpix = 0;
}
/* packet size = 4096 */
for (i = 0; i < STV680_NUMSBUF; i++) {
stv680->sbuf[i].data = kmalloc (stv680->rawbufsize, GFP_KERNEL);
if (stv680->sbuf[i].data == NULL) {
PDEBUG (0, "STV(e): Could not kmalloc raw data buffer %i", i);
goto nomem_err;
}
}
stv680->scratch_next = 0;
stv680->scratch_use = 0;
stv680->scratch_overflow = 0;
for (i = 0; i < STV680_NUMSCRATCH; i++) {
stv680->scratch[i].data = kmalloc (stv680->rawbufsize, GFP_KERNEL);
if (stv680->scratch[i].data == NULL) {
PDEBUG (0, "STV(e): Could not kmalloc raw scratch buffer %i", i);
goto nomem_err;
}
stv680->scratch[i].state = BUFFER_UNUSED;
}
for (i = 0; i < STV680_NUMSBUF; i++) {
urb = usb_alloc_urb (0, GFP_KERNEL);
if (!urb)
goto nomem_err;
/* sbuf is urb->transfer_buffer, later gets memcpyed to scratch */
usb_fill_bulk_urb (urb, stv680->udev,
usb_rcvbulkpipe (stv680->udev, stv680->bulk_in_endpointAddr),
stv680->sbuf[i].data, stv680->rawbufsize,
stv680_video_irq, stv680);
stv680->urb[i] = urb;
err = usb_submit_urb (stv680->urb[i], GFP_KERNEL);
if (err)
PDEBUG (0, "STV(e): urb burned down in start stream");
} /* i STV680_NUMSBUF */
stv680->framecount = 0;
return 0;
nomem_err:
for (i = 0; i < STV680_NUMSCRATCH; i++) {
kfree(stv680->scratch[i].data);
stv680->scratch[i].data = NULL;
}
for (i = 0; i < STV680_NUMSBUF; i++) {
usb_kill_urb(stv680->urb[i]);
usb_free_urb(stv680->urb[i]);
stv680->urb[i] = NULL;
kfree(stv680->sbuf[i].data);
stv680->sbuf[i].data = NULL;
}
return -ENOMEM;
}
static int stv680_stop_stream (struct usb_stv *stv680)
{
int i;
if (!stv680->streaming || !stv680->udev)
return 1;
stv680->streaming = 0;
for (i = 0; i < STV680_NUMSBUF; i++)
if (stv680->urb[i]) {
usb_kill_urb (stv680->urb[i]);
usb_free_urb (stv680->urb[i]);
stv680->urb[i] = NULL;
kfree(stv680->sbuf[i].data);
}
for (i = 0; i < STV680_NUMSCRATCH; i++) {
kfree(stv680->scratch[i].data);
stv680->scratch[i].data = NULL;
}
return 0;
}
static int stv680_set_size (struct usb_stv *stv680, int width, int height)
{
int wasstreaming = stv680->streaming;
/* Check to see if we need to change */
if ((stv680->vwidth == width) && (stv680->vheight == height))
return 0;
PDEBUG (1, "STV(i): size request for %i x %i", width, height);
/* Check for a valid mode */
if ((!width || !height) || ((width & 1) || (height & 1))) {
PDEBUG (1, "STV(e): set_size error: request: v.width = %i, v.height = %i actual: stv.width = %i, stv.height = %i", width, height, stv680->vwidth, stv680->vheight);
return 1;
}
if ((width < (stv680->maxwidth / 2)) || (height < (stv680->maxheight / 2))) {
width = stv680->maxwidth / 2;
height = stv680->maxheight / 2;
} else if ((width >= 158) && (width <= 166) && (stv680->QVGA == 1)) {
width = 160;
height = 120;
} else if ((width >= 172) && (width <= 180) && (stv680->CIF == 1)) {
width = 176;
height = 144;
} else if ((width >= 318) && (width <= 350) && (stv680->QVGA == 1)) {
width = 320;
height = 240;
} else if ((width >= 350) && (width <= 358) && (stv680->CIF == 1)) {
width = 352;
height = 288;
} else {
PDEBUG (1, "STV(e): request for non-supported size: request: v.width = %i, v.height = %i actual: stv.width = %i, stv.height = %i", width, height, stv680->vwidth, stv680->vheight);
return 1;
}
/* Stop a current stream and start it again at the new size */
if (wasstreaming)
stv680_stop_stream (stv680);
stv680->vwidth = width;
stv680->vheight = height;
PDEBUG (1, "STV(i): size set to %i x %i", stv680->vwidth, stv680->vheight);
if (wasstreaming)
stv680_start_stream (stv680);
return 0;
}
/**********************************************************************
* Video Decoding
**********************************************************************/
/******* routines from the pencam program; hey, they work! ********/
/*
* STV0680 Vision Camera Chipset Driver
* Copyright (C) 2000 Adam Harrison <adam@antispin.org>
*/
#define RED 0
#define GREEN 1
#define BLUE 2
#define AD(x, y, w) (((y)*(w)+(x))*3)
static void bayer_unshuffle (struct usb_stv *stv680, struct stv680_scratch *buffer)
{
int x, y, i;
int w = stv680->cwidth;
int vw = stv680->cwidth, vh = stv680->cheight;
unsigned int p = 0;
int colour = 0, bayer = 0;
unsigned char *raw = buffer->data;
struct stv680_frame *frame = &stv680->frame[stv680->curframe];
unsigned char *output = frame->data;
unsigned char *temp = frame->data;
int offset = buffer->offset;
if (frame->curpix == 0) {
if (frame->grabstate == FRAME_READY) {
frame->grabstate = FRAME_GRABBING;
}
}
if (offset != frame->curpix) { /* Regard frame as lost :( */
frame->curpix = 0;
stv680->error++;
return;
}
if ((stv680->vwidth == 320) || (stv680->vwidth == 160)) {
vw = 320;
vh = 240;
}
if ((stv680->vwidth == 352) || (stv680->vwidth == 176)) {
vw = 352;
vh = 288;
}
memset (output, 0, 3 * vw * vh); /* clear output matrix. */
for (y = 0; y < vh; y++) {
for (x = 0; x < vw; x++) {
if (x & 1)
p = *(raw + y * w + (x >> 1));
else
p = *(raw + y * w + (x >> 1) + (w >> 1));
if (y & 1)
bayer = 2;
else
bayer = 0;
if (x & 1)
bayer++;
switch (bayer) {
case 0:
case 3:
colour = 1;
break;
case 1:
colour = 0;
break;
case 2:
colour = 2;
break;
}
i = (y * vw + x) * 3;
*(output + i + colour) = (unsigned char) p;
} /* for x */
} /* for y */
/****** gamma correction plus hardcoded white balance */
/* Thanks to Alexander Schwartx <alexander.schwartx@gmx.net> for this code.
Correction values red[], green[], blue[], are generated by
(pow(i/256.0, GAMMA)*255.0)*white balanceRGB where GAMMA=0.55, 1<i<255.
White balance (RGB)= 1.0, 1.17, 1.48. Values are calculated as double float and
converted to unsigned char. Values are in stv680.h */
for (y = 0; y < vh; y++) {
for (x = 0; x < vw; x++) {
i = (y * vw + x) * 3;
*(output + i) = red[*(output + i)];
*(output + i + 1) = green[*(output + i + 1)];
*(output + i + 2) = blue[*(output + i + 2)];
}
}
/****** bayer demosaic ******/
for (y = 1; y < (vh - 1); y++) {
for (x = 1; x < (vw - 1); x++) { /* work out pixel type */
if (y & 1)
bayer = 0;
else
bayer = 2;
if (!(x & 1))
bayer++;
switch (bayer) {
case 0: /* green. blue lr, red tb */
*(output + AD (x, y, vw) + BLUE) = ((int) *(output + AD (x - 1, y, vw) + BLUE) + (int) *(output + AD (x + 1, y, vw) + BLUE)) >> 1;
*(output + AD (x, y, vw) + RED) = ((int) *(output + AD (x, y - 1, vw) + RED) + (int) *(output + AD (x, y + 1, vw) + RED)) >> 1;
break;
case 1: /* blue. green lrtb, red diagonals */
*(output + AD (x, y, vw) + GREEN) = ((int) *(output + AD (x - 1, y, vw) + GREEN) + (int) *(output + AD (x + 1, y, vw) + GREEN) + (int) *(output + AD (x, y - 1, vw) + GREEN) + (int) *(output + AD (x, y + 1, vw) + GREEN)) >> 2;
*(output + AD (x, y, vw) + RED) = ((int) *(output + AD (x - 1, y - 1, vw) + RED) + (int) *(output + AD (x - 1, y + 1, vw) + RED) + (int) *(output + AD (x + 1, y - 1, vw) + RED) + (int) *(output + AD (x + 1, y + 1, vw) + RED)) >> 2;
break;
case 2: /* red. green lrtb, blue diagonals */
*(output + AD (x, y, vw) + GREEN) = ((int) *(output + AD (x - 1, y, vw) + GREEN) + (int) *(output + AD (x + 1, y, vw) + GREEN) + (int) *(output + AD (x, y - 1, vw) + GREEN) + (int) *(output + AD (x, y + 1, vw) + GREEN)) >> 2;
*(output + AD (x, y, vw) + BLUE) = ((int) *(output + AD (x - 1, y - 1, vw) + BLUE) + (int) *(output + AD (x + 1, y - 1, vw) + BLUE) + (int) *(output + AD (x - 1, y + 1, vw) + BLUE) + (int) *(output + AD (x + 1, y + 1, vw) + BLUE)) >> 2;
break;
case 3: /* green. red lr, blue tb */
*(output + AD (x, y, vw) + RED) = ((int) *(output + AD (x - 1, y, vw) + RED) + (int) *(output + AD (x + 1, y, vw) + RED)) >> 1;
*(output + AD (x, y, vw) + BLUE) = ((int) *(output + AD (x, y - 1, vw) + BLUE) + (int) *(output + AD (x, y + 1, vw) + BLUE)) >> 1;
break;
} /* switch */
} /* for x */
} /* for y - end demosaic */
/* fix top and bottom row, left and right side */
i = vw * 3;
memcpy (output, (output + i), i);
memcpy ((output + (vh * i)), (output + ((vh - 1) * i)), i);
for (y = 0; y < vh; y++) {
i = y * vw * 3;
memcpy ((output + i), (output + i + 3), 3);
memcpy ((output + i + (vw * 3)), (output + i + (vw - 1) * 3), 3);
}
/* process all raw data, then trim to size if necessary */
if ((stv680->vwidth == 160) || (stv680->vwidth == 176)) {
i = 0;
for (y = 0; y < vh; y++) {
if (!(y & 1)) {
for (x = 0; x < vw; x++) {
p = (y * vw + x) * 3;
if (!(x & 1)) {
*(output + i) = *(output + p);
*(output + i + 1) = *(output + p + 1);
*(output + i + 2) = *(output + p + 2);
i += 3;
}
} /* for x */
}
} /* for y */
}
/* reset to proper width */
if ((stv680->vwidth == 160)) {
vw = 160;
vh = 120;
}
if ((stv680->vwidth == 176)) {
vw = 176;
vh = 144;
}
/* output is RGB; some programs want BGR */
/* swapRGB_on=0 -> program decides; swapRGB_on=1, always swap */
/* swapRGB_on=-1, never swap */
if (((swapRGB == 1) && (swapRGB_on != -1)) || (swapRGB_on == 1)) {
for (y = 0; y < vh; y++) {
for (x = 0; x < vw; x++) {
i = (y * vw + x) * 3;
*(temp) = *(output + i);
*(output + i) = *(output + i + 2);
*(output + i + 2) = *(temp);
}
}
}
/* brightness */
if (stv680->chgbright == 1) {
if (stv680->brightness >= 32767) {
p = (stv680->brightness - 32767) / 256;
for (x = 0; x < (vw * vh * 3); x++) {
if ((*(output + x) + (unsigned char) p) > 255)
*(output + x) = 255;
else
*(output + x) += (unsigned char) p;
} /* for */
} else {
p = (32767 - stv680->brightness) / 256;
for (x = 0; x < (vw * vh * 3); x++) {
if ((unsigned char) p > *(output + x))
*(output + x) = 0;
else
*(output + x) -= (unsigned char) p;
} /* for */
} /* else */
}
/* if */
frame->curpix = 0;
frame->curlinepix = 0;
frame->grabstate = FRAME_DONE;
stv680->framecount++;
stv680->readcount++;
if (stv680->frame[(stv680->curframe + 1) & (STV680_NUMFRAMES - 1)].grabstate == FRAME_READY) {
stv680->curframe = (stv680->curframe + 1) & (STV680_NUMFRAMES - 1);
}
} /* bayer_unshuffle */
/******* end routines from the pencam program *********/
static int stv680_newframe (struct usb_stv *stv680, int framenr)
{
int errors = 0;
while (stv680->streaming && (stv680->frame[framenr].grabstate == FRAME_READY || stv680->frame[framenr].grabstate == FRAME_GRABBING)) {
if (!stv680->frame[framenr].curpix) {
errors++;
}
wait_event_interruptible (stv680->wq, (stv680->scratch[stv680->scratch_use].state == BUFFER_READY));
if (stv680->nullpackets > STV680_MAX_NULLPACKETS) {
stv680->nullpackets = 0;
PDEBUG (2, "STV(i): too many null length packets, restarting capture");
stv680_stop_stream (stv680);
stv680_start_stream (stv680);
} else {
if (stv680->scratch[stv680->scratch_use].state != BUFFER_READY) {
stv680->frame[framenr].grabstate = FRAME_ERROR;
PDEBUG (2, "STV(e): FRAME_ERROR in _newframe");
return -EIO;
}
stv680->scratch[stv680->scratch_use].state = BUFFER_BUSY;
bayer_unshuffle (stv680, &stv680->scratch[stv680->scratch_use]);
stv680->scratch[stv680->scratch_use].state = BUFFER_UNUSED;
stv680->scratch_use++;
if (stv680->scratch_use >= STV680_NUMSCRATCH)
stv680->scratch_use = 0;
if (errors > STV680_MAX_ERRORS) {
errors = 0;
PDEBUG (2, "STV(i): too many errors, restarting capture");
stv680_stop_stream (stv680);
stv680_start_stream (stv680);
}
} /* else */
} /* while */
return 0;
}
/*********************************************************************
* Video4Linux
*********************************************************************/
static int stv_open (struct inode *inode, struct file *file)
{
struct video_device *dev = video_devdata(file);
struct usb_stv *stv680 = video_get_drvdata(dev);
int err = 0;
/* we are called with the BKL held */
stv680->user = 1;
err = stv_init (stv680); /* main initialization routine for camera */
if (err >= 0) {
stv680->fbuf = rvmalloc (stv680->maxframesize * STV680_NUMFRAMES);
if (!stv680->fbuf) {
PDEBUG (0, "STV(e): Could not rvmalloc frame bufer");
err = -ENOMEM;
}
file->private_data = dev;
}
if (err)
stv680->user = 0;
return err;
}
static int stv_close (struct inode *inode, struct file *file)
{
struct video_device *dev = file->private_data;
struct usb_stv *stv680 = video_get_drvdata(dev);
int i;
for (i = 0; i < STV680_NUMFRAMES; i++)
stv680->frame[i].grabstate = FRAME_UNUSED;
if (stv680->streaming)
stv680_stop_stream (stv680);
if ((i = stv_stop_video (stv680)) < 0)
PDEBUG (1, "STV(e): stop_video failed in stv_close");
rvfree (stv680->fbuf, stv680->maxframesize * STV680_NUMFRAMES);
stv680->user = 0;
if (stv680->removed) {
kfree(stv680);
stv680 = NULL;
PDEBUG (0, "STV(i): device unregistered");
}
file->private_data = NULL;
return 0;
}
static int stv680_do_ioctl (struct inode *inode, struct file *file,
unsigned int cmd, void *arg)
{
struct video_device *vdev = file->private_data;
struct usb_stv *stv680 = video_get_drvdata(vdev);
if (!stv680->udev)
return -EIO;
switch (cmd) {
case VIDIOCGCAP:{
struct video_capability *b = arg;
strcpy (b->name, stv680->camera_name);
b->type = VID_TYPE_CAPTURE;
b->channels = 1;
b->audios = 0;
b->maxwidth = stv680->maxwidth;
b->maxheight = stv680->maxheight;
b->minwidth = stv680->maxwidth / 2;
b->minheight = stv680->maxheight / 2;
return 0;
}
case VIDIOCGCHAN:{
struct video_channel *v = arg;
if (v->channel != 0)
return -EINVAL;
v->flags = 0;
v->tuners = 0;
v->type = VIDEO_TYPE_CAMERA;
strcpy (v->name, "STV Camera");
return 0;
}
case VIDIOCSCHAN:{
struct video_channel *v = arg;
if (v->channel != 0)
return -EINVAL;
return 0;
}
case VIDIOCGPICT:{
struct video_picture *p = arg;
stv680_get_pict (stv680, p);
return 0;
}
case VIDIOCSPICT:{
struct video_picture *p = arg;
if (stv680_set_pict (stv680, p))
return -EINVAL;
return 0;
}
case VIDIOCSWIN:{
struct video_window *vw = arg;
if (vw->flags)
return -EINVAL;
if (vw->clipcount)
return -EINVAL;
if (vw->width != stv680->vwidth) {
if (stv680_set_size (stv680, vw->width, vw->height)) {
PDEBUG (2, "STV(e): failed (from user) set size in VIDIOCSWIN");
return -EINVAL;
}
}
return 0;
}
case VIDIOCGWIN:{
struct video_window *vw = arg;
vw->x = 0; /* FIXME */
vw->y = 0;
vw->chromakey = 0;
vw->flags = 0;
vw->clipcount = 0;
vw->width = stv680->vwidth;
vw->height = stv680->vheight;
return 0;
}
case VIDIOCGMBUF:{
struct video_mbuf *vm = arg;
int i;
memset (vm, 0, sizeof (*vm));
vm->size = STV680_NUMFRAMES * stv680->maxframesize;
vm->frames = STV680_NUMFRAMES;
for (i = 0; i < STV680_NUMFRAMES; i++)
vm->offsets[i] = stv680->maxframesize * i;
return 0;
}
case VIDIOCMCAPTURE:{
struct video_mmap *vm = arg;
if (vm->format != STV_VIDEO_PALETTE) {
PDEBUG (2, "STV(i): VIDIOCMCAPTURE vm.format (%i) != VIDEO_PALETTE (%i)",
vm->format, STV_VIDEO_PALETTE);
if ((vm->format == 3) && (swapRGB_on == 0)) {
PDEBUG (2, "STV(i): VIDIOCMCAPTURE swapRGB is (auto) ON");
/* this may fix those apps (e.g., xawtv) that want BGR */
swapRGB = 1;
}
return -EINVAL;
}
if (vm->frame >= STV680_NUMFRAMES) {
PDEBUG (2, "STV(e): VIDIOCMCAPTURE vm.frame > NUMFRAMES");
return -EINVAL;
}
if ((stv680->frame[vm->frame].grabstate == FRAME_ERROR)
|| (stv680->frame[vm->frame].grabstate == FRAME_GRABBING)) {
PDEBUG (2, "STV(e): VIDIOCMCAPTURE grabstate (%i) error",
stv680->frame[vm->frame].grabstate);
return -EBUSY;
}
/* Is this according to the v4l spec??? */
if (stv680->vwidth != vm->width) {
if (stv680_set_size (stv680, vm->width, vm->height)) {
PDEBUG (2, "STV(e): VIDIOCMCAPTURE set_size failed");
return -EINVAL;
}
}
stv680->frame[vm->frame].grabstate = FRAME_READY;
if (!stv680->streaming)
stv680_start_stream (stv680);
return 0;
}
case VIDIOCSYNC:{
int *frame = arg;
int ret = 0;
if (*frame < 0 || *frame >= STV680_NUMFRAMES) {
PDEBUG (2, "STV(e): Bad frame # in VIDIOCSYNC");
return -EINVAL;
}
ret = stv680_newframe (stv680, *frame);
stv680->frame[*frame].grabstate = FRAME_UNUSED;
return ret;
}
case VIDIOCGFBUF:{
struct video_buffer *vb = arg;
memset (vb, 0, sizeof (*vb));
return 0;
}
case VIDIOCKEY:
return 0;
case VIDIOCCAPTURE:
{
PDEBUG (2, "STV(e): VIDIOCCAPTURE failed");
return -EINVAL;
}
case VIDIOCSFBUF:
case VIDIOCGTUNER:
case VIDIOCSTUNER:
case VIDIOCGFREQ:
case VIDIOCSFREQ:
case VIDIOCGAUDIO:
case VIDIOCSAUDIO:
return -EINVAL;
default:
return -ENOIOCTLCMD;
} /* end switch */
return 0;
}
static int stv680_ioctl(struct inode *inode, struct file *file,
unsigned int cmd, unsigned long arg)
{
return video_usercopy(inode, file, cmd, arg, stv680_do_ioctl);
}
static int stv680_mmap (struct file *file, struct vm_area_struct *vma)
{
struct video_device *dev = file->private_data;
struct usb_stv *stv680 = video_get_drvdata(dev);
unsigned long start = vma->vm_start;
unsigned long size = vma->vm_end-vma->vm_start;
unsigned long page, pos;
mutex_lock(&stv680->lock);
if (stv680->udev == NULL) {
mutex_unlock(&stv680->lock);
return -EIO;
}
if (size > (((STV680_NUMFRAMES * stv680->maxframesize) + PAGE_SIZE - 1)
& ~(PAGE_SIZE - 1))) {
mutex_unlock(&stv680->lock);
return -EINVAL;
}
pos = (unsigned long) stv680->fbuf;
while (size > 0) {
page = vmalloc_to_pfn((void *)pos);
if (remap_pfn_range(vma, start, page, PAGE_SIZE, PAGE_SHARED)) {
mutex_unlock(&stv680->lock);
return -EAGAIN;
}
start += PAGE_SIZE;
pos += PAGE_SIZE;
if (size > PAGE_SIZE)
size -= PAGE_SIZE;
else
size = 0;
}
mutex_unlock(&stv680->lock);
return 0;
}
static ssize_t stv680_read (struct file *file, char __user *buf,
size_t count, loff_t *ppos)
{
struct video_device *dev = file->private_data;
unsigned long int realcount = count;
int ret = 0;
struct usb_stv *stv680 = video_get_drvdata(dev);
unsigned long int i;
if (STV680_NUMFRAMES != 2) {
PDEBUG (0, "STV(e): STV680_NUMFRAMES needs to be 2!");
return -1;
}
if (stv680->udev == NULL)
return -EIO;
if (realcount > (stv680->vwidth * stv680->vheight * 3))
realcount = stv680->vwidth * stv680->vheight * 3;
/* Shouldn't happen: */
if (stv680->frame[0].grabstate == FRAME_GRABBING) {
PDEBUG (2, "STV(e): FRAME_GRABBING in stv680_read");
return -EBUSY;
}
stv680->frame[0].grabstate = FRAME_READY;
stv680->frame[1].grabstate = FRAME_UNUSED;
stv680->curframe = 0;
if (!stv680->streaming)
stv680_start_stream (stv680);
if (!stv680->streaming) {
ret = stv680_newframe (stv680, 0); /* ret should = 0 */
}
ret = stv680_newframe (stv680, 0);
if (!ret) {
if ((i = copy_to_user (buf, stv680->frame[0].data, realcount)) != 0) {
PDEBUG (2, "STV(e): copy_to_user frame 0 failed, ret count = %li", i);
return -EFAULT;
}
} else {
realcount = ret;
}
stv680->frame[0].grabstate = FRAME_UNUSED;
return realcount;
} /* stv680_read */
static const struct file_operations stv680_fops = {
.owner = THIS_MODULE,
.open = stv_open,
.release = stv_close,
.read = stv680_read,
.mmap = stv680_mmap,
.ioctl = stv680_ioctl,
.compat_ioctl = v4l_compat_ioctl32,
.llseek = no_llseek,
};
static struct video_device stv680_template = {
.owner = THIS_MODULE,
.name = "STV0680 USB camera",
.type = VID_TYPE_CAPTURE,
.hardware = VID_HARDWARE_SE401,
.fops = &stv680_fops,
.release = video_device_release,
.minor = -1,
};
static int stv680_probe (struct usb_interface *intf, const struct usb_device_id *id)
{
struct usb_device *dev = interface_to_usbdev(intf);
struct usb_host_interface *interface;
struct usb_stv *stv680 = NULL;
char *camera_name = NULL;
int retval = 0;
/* We don't handle multi-config cameras */
if (dev->descriptor.bNumConfigurations != 1) {
PDEBUG (0, "STV(e): Number of Configurations != 1");
return -ENODEV;
}
interface = &intf->altsetting[0];
/* Is it a STV680? */
if ((le16_to_cpu(dev->descriptor.idVendor) == USB_PENCAM_VENDOR_ID) &&
(le16_to_cpu(dev->descriptor.idProduct) == USB_PENCAM_PRODUCT_ID)) {
camera_name = "STV0680";
PDEBUG (0, "STV(i): STV0680 camera found.");
} else if ((le16_to_cpu(dev->descriptor.idVendor) == USB_CREATIVEGOMINI_VENDOR_ID) &&
(le16_to_cpu(dev->descriptor.idProduct) == USB_CREATIVEGOMINI_PRODUCT_ID)) {
camera_name = "Creative WebCam Go Mini";
PDEBUG (0, "STV(i): Creative WebCam Go Mini found.");
} else {
PDEBUG (0, "STV(e): Vendor/Product ID do not match STV0680 or Creative WebCam Go Mini values.");
PDEBUG (0, "STV(e): Check that the STV0680 or Creative WebCam Go Mini camera is connected to the computer.");
retval = -ENODEV;
goto error;
}
/* We found one */
if ((stv680 = kzalloc (sizeof (*stv680), GFP_KERNEL)) == NULL) {
PDEBUG (0, "STV(e): couldn't kmalloc stv680 struct.");
retval = -ENOMEM;
goto error;
}
stv680->udev = dev;
stv680->camera_name = camera_name;
stv680->vdev = video_device_alloc();
if (!stv680->vdev) {
retval = -ENOMEM;
goto error;
}
memcpy(stv680->vdev, &stv680_template, sizeof(stv680_template));
stv680->vdev->dev = &intf->dev;
video_set_drvdata(stv680->vdev, stv680);
memcpy (stv680->vdev->name, stv680->camera_name, strlen (stv680->camera_name));
init_waitqueue_head (&stv680->wq);
mutex_init (&stv680->lock);
wmb ();
if (video_register_device (stv680->vdev, VFL_TYPE_GRABBER, video_nr) == -1) {
PDEBUG (0, "STV(e): video_register_device failed");
retval = -EIO;
goto error_vdev;
}
PDEBUG (0, "STV(i): registered new video device: video%d", stv680->vdev->minor);
usb_set_intfdata (intf, stv680);
retval = stv680_create_sysfs_files(stv680->vdev);
if (retval)
goto error_unreg;
return 0;
error_unreg:
video_unregister_device(stv680->vdev);
error_vdev:
video_device_release(stv680->vdev);
error:
kfree(stv680);
return retval;
}
static inline void usb_stv680_remove_disconnected (struct usb_stv *stv680)
{
int i;
stv680->udev = NULL;
stv680->frame[0].grabstate = FRAME_ERROR;
stv680->frame[1].grabstate = FRAME_ERROR;
stv680->streaming = 0;
wake_up_interruptible (&stv680->wq);
for (i = 0; i < STV680_NUMSBUF; i++)
if (stv680->urb[i]) {
usb_kill_urb (stv680->urb[i]);
usb_free_urb (stv680->urb[i]);
stv680->urb[i] = NULL;
kfree(stv680->sbuf[i].data);
}
for (i = 0; i < STV680_NUMSCRATCH; i++)
kfree(stv680->scratch[i].data);
PDEBUG (0, "STV(i): %s disconnected", stv680->camera_name);
/* Free the memory */
kfree(stv680);
}
static void stv680_disconnect (struct usb_interface *intf)
{
struct usb_stv *stv680 = usb_get_intfdata (intf);
usb_set_intfdata (intf, NULL);
if (stv680) {
/* We don't want people trying to open up the device */
if (stv680->vdev) {
stv680_remove_sysfs_files(stv680->vdev);
video_unregister_device(stv680->vdev);
stv680->vdev = NULL;
}
if (!stv680->user) {
usb_stv680_remove_disconnected (stv680);
} else {
stv680->removed = 1;
}
}
}
static struct usb_driver stv680_driver = {
.name = "stv680",
.probe = stv680_probe,
.disconnect = stv680_disconnect,
.id_table = device_table
};
/********************************************************************
* Module routines
********************************************************************/
static int __init usb_stv680_init (void)
{
if (usb_register (&stv680_driver) < 0) {
PDEBUG (0, "STV(e): Could not setup STV0680 driver");
return -1;
}
PDEBUG (0, "STV(i): usb camera driver version %s registering", DRIVER_VERSION);
info(DRIVER_DESC " " DRIVER_VERSION);
return 0;
}
static void __exit usb_stv680_exit (void)
{
usb_deregister (&stv680_driver);
PDEBUG (0, "STV(i): driver deregistered");
}
module_init (usb_stv680_init);
module_exit (usb_stv680_exit);
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