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nest-open-source / nest-guard / 1.0 / linux / 6754b876e4c89285b30ff59800d23e21ce2dbe3f / . / linux / drivers / media / video / cpia2 / cpia2_v4l.c
blob: 46b433bbf2c18832b968aeca230f53372cf5c8b0 [file] [log] [blame]
/****************************************************************************
*
* Filename: cpia2_v4l.c
*
* Copyright 2001, STMicrolectronics, Inc.
* Contact: steve.miller@st.com
* Copyright 2001,2005, Scott J. Bertin <scottbertin@yahoo.com>
*
* Description:
* This is a USB driver for CPia2 based video cameras.
* The infrastructure of this driver is based on the cpia usb driver by
* Jochen Scharrlach and Johannes Erdfeldt.
*
* 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.
*
* Stripped of 2.4 stuff ready for main kernel submit by
* Alan Cox <alan@lxorguk.ukuu.org.uk>
****************************************************************************/
#include <linux/version.h>
#include <linux/module.h>
#include <linux/time.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/videodev2.h>
#include <linux/stringify.h>
#include <media/v4l2-ioctl.h>
#include "cpia2.h"
#include "cpia2dev.h"
static int video_nr = -1;
module_param(video_nr, int, 0);
MODULE_PARM_DESC(video_nr,"video device to register (0=/dev/video0, etc)");
static int buffer_size = 68*1024;
module_param(buffer_size, int, 0);
MODULE_PARM_DESC(buffer_size, "Size for each frame buffer in bytes (default 68k)");
static int num_buffers = 3;
module_param(num_buffers, int, 0);
MODULE_PARM_DESC(num_buffers, "Number of frame buffers (1-"
__stringify(VIDEO_MAX_FRAME) ", default 3)");
static int alternate = DEFAULT_ALT;
module_param(alternate, int, 0);
MODULE_PARM_DESC(alternate, "USB Alternate (" __stringify(USBIF_ISO_1) "-"
__stringify(USBIF_ISO_6) ", default "
__stringify(DEFAULT_ALT) ")");
static int flicker_freq = 60;
module_param(flicker_freq, int, 0);
MODULE_PARM_DESC(flicker_freq, "Flicker frequency (" __stringify(50) "or"
__stringify(60) ", default "
__stringify(60) ")");
static int flicker_mode = NEVER_FLICKER;
module_param(flicker_mode, int, 0);
MODULE_PARM_DESC(flicker_mode,
"Flicker supression (" __stringify(NEVER_FLICKER) "or"
__stringify(ANTI_FLICKER_ON) ", default "
__stringify(NEVER_FLICKER) ")");
MODULE_AUTHOR("Steve Miller (STMicroelectronics) <steve.miller@st.com>");
MODULE_DESCRIPTION("V4L-driver for STMicroelectronics CPiA2 based cameras");
MODULE_SUPPORTED_DEVICE("video");
MODULE_LICENSE("GPL");
#define ABOUT "V4L-Driver for Vision CPiA2 based cameras"
struct control_menu_info {
int value;
char name[32];
};
static struct control_menu_info framerate_controls[] =
{
{ CPIA2_VP_FRAMERATE_6_25, "6.25 fps" },
{ CPIA2_VP_FRAMERATE_7_5, "7.5 fps" },
{ CPIA2_VP_FRAMERATE_12_5, "12.5 fps" },
{ CPIA2_VP_FRAMERATE_15, "15 fps" },
{ CPIA2_VP_FRAMERATE_25, "25 fps" },
{ CPIA2_VP_FRAMERATE_30, "30 fps" },
};
#define NUM_FRAMERATE_CONTROLS (ARRAY_SIZE(framerate_controls))
static struct control_menu_info flicker_controls[] =
{
{ NEVER_FLICKER, "Off" },
{ FLICKER_50, "50 Hz" },
{ FLICKER_60, "60 Hz" },
};
#define NUM_FLICKER_CONTROLS (ARRAY_SIZE(flicker_controls))
static struct control_menu_info lights_controls[] =
{
{ 0, "Off" },
{ 64, "Top" },
{ 128, "Bottom" },
{ 192, "Both" },
};
#define NUM_LIGHTS_CONTROLS (ARRAY_SIZE(lights_controls))
#define GPIO_LIGHTS_MASK 192
static struct v4l2_queryctrl controls[] = {
{
.id = V4L2_CID_BRIGHTNESS,
.type = V4L2_CTRL_TYPE_INTEGER,
.name = "Brightness",
.minimum = 0,
.maximum = 255,
.step = 1,
.default_value = DEFAULT_BRIGHTNESS,
},
{
.id = V4L2_CID_CONTRAST,
.type = V4L2_CTRL_TYPE_INTEGER,
.name = "Contrast",
.minimum = 0,
.maximum = 255,
.step = 1,
.default_value = DEFAULT_CONTRAST,
},
{
.id = V4L2_CID_SATURATION,
.type = V4L2_CTRL_TYPE_INTEGER,
.name = "Saturation",
.minimum = 0,
.maximum = 255,
.step = 1,
.default_value = DEFAULT_SATURATION,
},
{
.id = V4L2_CID_HFLIP,
.type = V4L2_CTRL_TYPE_BOOLEAN,
.name = "Mirror Horizontally",
.minimum = 0,
.maximum = 1,
.step = 1,
.default_value = 0,
},
{
.id = V4L2_CID_VFLIP,
.type = V4L2_CTRL_TYPE_BOOLEAN,
.name = "Flip Vertically",
.minimum = 0,
.maximum = 1,
.step = 1,
.default_value = 0,
},
{
.id = CPIA2_CID_TARGET_KB,
.type = V4L2_CTRL_TYPE_INTEGER,
.name = "Target KB",
.minimum = 0,
.maximum = 255,
.step = 1,
.default_value = DEFAULT_TARGET_KB,
},
{
.id = CPIA2_CID_GPIO,
.type = V4L2_CTRL_TYPE_INTEGER,
.name = "GPIO",
.minimum = 0,
.maximum = 255,
.step = 1,
.default_value = 0,
},
{
.id = CPIA2_CID_FLICKER_MODE,
.type = V4L2_CTRL_TYPE_MENU,
.name = "Flicker Reduction",
.minimum = 0,
.maximum = NUM_FLICKER_CONTROLS-1,
.step = 1,
.default_value = 0,
},
{
.id = CPIA2_CID_FRAMERATE,
.type = V4L2_CTRL_TYPE_MENU,
.name = "Framerate",
.minimum = 0,
.maximum = NUM_FRAMERATE_CONTROLS-1,
.step = 1,
.default_value = NUM_FRAMERATE_CONTROLS-1,
},
{
.id = CPIA2_CID_USB_ALT,
.type = V4L2_CTRL_TYPE_INTEGER,
.name = "USB Alternate",
.minimum = USBIF_ISO_1,
.maximum = USBIF_ISO_6,
.step = 1,
.default_value = DEFAULT_ALT,
},
{
.id = CPIA2_CID_LIGHTS,
.type = V4L2_CTRL_TYPE_MENU,
.name = "Lights",
.minimum = 0,
.maximum = NUM_LIGHTS_CONTROLS-1,
.step = 1,
.default_value = 0,
},
{
.id = CPIA2_CID_RESET_CAMERA,
.type = V4L2_CTRL_TYPE_BUTTON,
.name = "Reset Camera",
.minimum = 0,
.maximum = 0,
.step = 0,
.default_value = 0,
},
};
#define NUM_CONTROLS (ARRAY_SIZE(controls))
/******************************************************************************
*
* cpia2_open
*
*****************************************************************************/
static int cpia2_open(struct file *file)
{
struct camera_data *cam = video_drvdata(file);
int retval = 0;
if (!cam) {
ERR("Internal error, camera_data not found!\n");
return -ENODEV;
}
if(mutex_lock_interruptible(&cam->busy_lock))
return -ERESTARTSYS;
if(!cam->present) {
retval = -ENODEV;
goto err_return;
}
if (cam->open_count > 0) {
goto skip_init;
}
if (cpia2_allocate_buffers(cam)) {
retval = -ENOMEM;
goto err_return;
}
/* reset the camera */
if (cpia2_reset_camera(cam) < 0) {
retval = -EIO;
goto err_return;
}
cam->APP_len = 0;
cam->COM_len = 0;
skip_init:
{
struct cpia2_fh *fh = kmalloc(sizeof(*fh),GFP_KERNEL);
if(!fh) {
retval = -ENOMEM;
goto err_return;
}
file->private_data = fh;
fh->prio = V4L2_PRIORITY_UNSET;
v4l2_prio_open(&cam->prio, &fh->prio);
fh->mmapped = 0;
}
++cam->open_count;
cpia2_dbg_dump_registers(cam);
err_return:
mutex_unlock(&cam->busy_lock);
return retval;
}
/******************************************************************************
*
* cpia2_close
*
*****************************************************************************/
static int cpia2_close(struct file *file)
{
struct video_device *dev = video_devdata(file);
struct camera_data *cam = video_get_drvdata(dev);
struct cpia2_fh *fh = file->private_data;
mutex_lock(&cam->busy_lock);
if (cam->present &&
(cam->open_count == 1
|| fh->prio == V4L2_PRIORITY_RECORD
)) {
cpia2_usb_stream_stop(cam);
if(cam->open_count == 1) {
/* save camera state for later open */
cpia2_save_camera_state(cam);
cpia2_set_low_power(cam);
cpia2_free_buffers(cam);
}
}
{
if(fh->mmapped)
cam->mmapped = 0;
v4l2_prio_close(&cam->prio, fh->prio);
file->private_data = NULL;
kfree(fh);
}
if (--cam->open_count == 0) {
cpia2_free_buffers(cam);
if (!cam->present) {
video_unregister_device(dev);
mutex_unlock(&cam->busy_lock);
kfree(cam);
return 0;
}
}
mutex_unlock(&cam->busy_lock);
return 0;
}
/******************************************************************************
*
* cpia2_v4l_read
*
*****************************************************************************/
static ssize_t cpia2_v4l_read(struct file *file, char __user *buf, size_t count,
loff_t *off)
{
struct camera_data *cam = video_drvdata(file);
int noblock = file->f_flags&O_NONBLOCK;
struct cpia2_fh *fh = file->private_data;
if(!cam)
return -EINVAL;
/* Priority check */
if(fh->prio != V4L2_PRIORITY_RECORD) {
return -EBUSY;
}
return cpia2_read(cam, buf, count, noblock);
}
/******************************************************************************
*
* cpia2_v4l_poll
*
*****************************************************************************/
static unsigned int cpia2_v4l_poll(struct file *filp, struct poll_table_struct *wait)
{
struct camera_data *cam = video_drvdata(filp);
struct cpia2_fh *fh = filp->private_data;
if(!cam)
return POLLERR;
/* Priority check */
if(fh->prio != V4L2_PRIORITY_RECORD) {
return POLLERR;
}
return cpia2_poll(cam, filp, wait);
}
static int sync(struct camera_data *cam, int frame_nr)
{
struct framebuf *frame = &cam->buffers[frame_nr];
while (1) {
if (frame->status == FRAME_READY)
return 0;
if (!cam->streaming) {
frame->status = FRAME_READY;
frame->length = 0;
return 0;
}
mutex_unlock(&cam->busy_lock);
wait_event_interruptible(cam->wq_stream,
!cam->streaming ||
frame->status == FRAME_READY);
mutex_lock(&cam->busy_lock);
if (signal_pending(current))
return -ERESTARTSYS;
if(!cam->present)
return -ENOTTY;
}
}
/******************************************************************************
*
* ioctl_get_mbuf
*
*****************************************************************************/
#ifdef CONFIG_VIDEO_V4L1_COMPAT
static int ioctl_get_mbuf(void *arg, struct camera_data *cam)
{
struct video_mbuf *vm;
int i;
vm = arg;
memset(vm, 0, sizeof(*vm));
vm->size = cam->frame_size*cam->num_frames;
vm->frames = cam->num_frames;
for (i = 0; i < cam->num_frames; i++)
vm->offsets[i] = cam->frame_size * i;
return 0;
}
#endif
/******************************************************************************
*
* ioctl_set_gpio
*
*****************************************************************************/
static int ioctl_set_gpio(void *arg, struct camera_data *cam)
{
__u32 gpio_val;
gpio_val = *(__u32*) arg;
if (gpio_val &~ 0xFFU)
return -EINVAL;
return cpia2_set_gpio(cam, (unsigned char)gpio_val);
}
/******************************************************************************
*
* ioctl_querycap
*
* V4L2 device capabilities
*
*****************************************************************************/
static int ioctl_querycap(void *arg, struct camera_data *cam)
{
struct v4l2_capability *vc = arg;
memset(vc, 0, sizeof(*vc));
strcpy(vc->driver, "cpia2");
if (cam->params.pnp_id.product == 0x151)
strcpy(vc->card, "QX5 Microscope");
else
strcpy(vc->card, "CPiA2 Camera");
switch (cam->params.pnp_id.device_type) {
case DEVICE_STV_672:
strcat(vc->card, " (672/");
break;
case DEVICE_STV_676:
strcat(vc->card, " (676/");
break;
default:
strcat(vc->card, " (???/");
break;
}
switch (cam->params.version.sensor_flags) {
case CPIA2_VP_SENSOR_FLAGS_404:
strcat(vc->card, "404)");
break;
case CPIA2_VP_SENSOR_FLAGS_407:
strcat(vc->card, "407)");
break;
case CPIA2_VP_SENSOR_FLAGS_409:
strcat(vc->card, "409)");
break;
case CPIA2_VP_SENSOR_FLAGS_410:
strcat(vc->card, "410)");
break;
case CPIA2_VP_SENSOR_FLAGS_500:
strcat(vc->card, "500)");
break;
default:
strcat(vc->card, "???)");
break;
}
if (usb_make_path(cam->dev, vc->bus_info, sizeof(vc->bus_info)) <0)
memset(vc->bus_info,0, sizeof(vc->bus_info));
vc->version = KERNEL_VERSION(CPIA2_MAJ_VER, CPIA2_MIN_VER,
CPIA2_PATCH_VER);
vc->capabilities = V4L2_CAP_VIDEO_CAPTURE |
V4L2_CAP_READWRITE |
V4L2_CAP_STREAMING;
return 0;
}
/******************************************************************************
*
* ioctl_input
*
* V4L2 input get/set/enumerate
*
*****************************************************************************/
static int ioctl_input(unsigned int ioclt_nr,void *arg,struct camera_data *cam)
{
struct v4l2_input *i = arg;
if(ioclt_nr != VIDIOC_G_INPUT) {
if (i->index != 0)
return -EINVAL;
}
memset(i, 0, sizeof(*i));
strcpy(i->name, "Camera");
i->type = V4L2_INPUT_TYPE_CAMERA;
return 0;
}
/******************************************************************************
*
* ioctl_enum_fmt
*
* V4L2 format enumerate
*
*****************************************************************************/
static int ioctl_enum_fmt(void *arg,struct camera_data *cam)
{
struct v4l2_fmtdesc *f = arg;
int index = f->index;
if (index < 0 || index > 1)
return -EINVAL;
memset(f, 0, sizeof(*f));
f->index = index;
f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
f->flags = V4L2_FMT_FLAG_COMPRESSED;
switch(index) {
case 0:
strcpy(f->description, "MJPEG");
f->pixelformat = V4L2_PIX_FMT_MJPEG;
break;
case 1:
strcpy(f->description, "JPEG");
f->pixelformat = V4L2_PIX_FMT_JPEG;
break;
default:
return -EINVAL;
}
return 0;
}
/******************************************************************************
*
* ioctl_try_fmt
*
* V4L2 format try
*
*****************************************************************************/
static int ioctl_try_fmt(void *arg,struct camera_data *cam)
{
struct v4l2_format *f = arg;
if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
return -EINVAL;
if (f->fmt.pix.pixelformat != V4L2_PIX_FMT_MJPEG &&
f->fmt.pix.pixelformat != V4L2_PIX_FMT_JPEG)
return -EINVAL;
f->fmt.pix.field = V4L2_FIELD_NONE;
f->fmt.pix.bytesperline = 0;
f->fmt.pix.sizeimage = cam->frame_size;
f->fmt.pix.colorspace = V4L2_COLORSPACE_JPEG;
f->fmt.pix.priv = 0;
switch (cpia2_match_video_size(f->fmt.pix.width, f->fmt.pix.height)) {
case VIDEOSIZE_VGA:
f->fmt.pix.width = 640;
f->fmt.pix.height = 480;
break;
case VIDEOSIZE_CIF:
f->fmt.pix.width = 352;
f->fmt.pix.height = 288;
break;
case VIDEOSIZE_QVGA:
f->fmt.pix.width = 320;
f->fmt.pix.height = 240;
break;
case VIDEOSIZE_288_216:
f->fmt.pix.width = 288;
f->fmt.pix.height = 216;
break;
case VIDEOSIZE_256_192:
f->fmt.pix.width = 256;
f->fmt.pix.height = 192;
break;
case VIDEOSIZE_224_168:
f->fmt.pix.width = 224;
f->fmt.pix.height = 168;
break;
case VIDEOSIZE_192_144:
f->fmt.pix.width = 192;
f->fmt.pix.height = 144;
break;
case VIDEOSIZE_QCIF:
default:
f->fmt.pix.width = 176;
f->fmt.pix.height = 144;
break;
}
return 0;
}
/******************************************************************************
*
* ioctl_set_fmt
*
* V4L2 format set
*
*****************************************************************************/
static int ioctl_set_fmt(void *arg,struct camera_data *cam, struct cpia2_fh *fh)
{
struct v4l2_format *f = arg;
int err, frame;
err = ioctl_try_fmt(arg, cam);
if(err != 0)
return err;
/* Ensure that only this process can change the format. */
err = v4l2_prio_change(&cam->prio, &fh->prio, V4L2_PRIORITY_RECORD);
if(err != 0) {
return err;
}
cam->pixelformat = f->fmt.pix.pixelformat;
/* NOTE: This should be set to 1 for MJPEG, but some apps don't handle
* the missing Huffman table properly. */
cam->params.compression.inhibit_htables = 0;
/*f->fmt.pix.pixelformat == V4L2_PIX_FMT_MJPEG;*/
/* we set the video window to something smaller or equal to what
* is requested by the user???
*/
DBG("Requested width = %d, height = %d\n",
f->fmt.pix.width, f->fmt.pix.height);
if (f->fmt.pix.width != cam->width ||
f->fmt.pix.height != cam->height) {
cam->width = f->fmt.pix.width;
cam->height = f->fmt.pix.height;
cam->params.roi.width = f->fmt.pix.width;
cam->params.roi.height = f->fmt.pix.height;
cpia2_set_format(cam);
}
for (frame = 0; frame < cam->num_frames; ++frame) {
if (cam->buffers[frame].status == FRAME_READING)
if ((err = sync(cam, frame)) < 0)
return err;
cam->buffers[frame].status = FRAME_EMPTY;
}
return 0;
}
/******************************************************************************
*
* ioctl_get_fmt
*
* V4L2 format get
*
*****************************************************************************/
static int ioctl_get_fmt(void *arg,struct camera_data *cam)
{
struct v4l2_format *f = arg;
if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
return -EINVAL;
f->fmt.pix.width = cam->width;
f->fmt.pix.height = cam->height;
f->fmt.pix.pixelformat = cam->pixelformat;
f->fmt.pix.field = V4L2_FIELD_NONE;
f->fmt.pix.bytesperline = 0;
f->fmt.pix.sizeimage = cam->frame_size;
f->fmt.pix.colorspace = V4L2_COLORSPACE_JPEG;
f->fmt.pix.priv = 0;
return 0;
}
/******************************************************************************
*
* ioctl_cropcap
*
* V4L2 query cropping capabilities
* NOTE: cropping is currently disabled
*
*****************************************************************************/
static int ioctl_cropcap(void *arg,struct camera_data *cam)
{
struct v4l2_cropcap *c = arg;
if (c->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
return -EINVAL;
c->bounds.left = 0;
c->bounds.top = 0;
c->bounds.width = cam->width;
c->bounds.height = cam->height;
c->defrect.left = 0;
c->defrect.top = 0;
c->defrect.width = cam->width;
c->defrect.height = cam->height;
c->pixelaspect.numerator = 1;
c->pixelaspect.denominator = 1;
return 0;
}
/******************************************************************************
*
* ioctl_queryctrl
*
* V4L2 query possible control variables
*
*****************************************************************************/
static int ioctl_queryctrl(void *arg,struct camera_data *cam)
{
struct v4l2_queryctrl *c = arg;
int i;
for(i=0; i<NUM_CONTROLS; ++i) {
if(c->id == controls[i].id) {
memcpy(c, controls+i, sizeof(*c));
break;
}
}
if(i == NUM_CONTROLS)
return -EINVAL;
/* Some devices have additional limitations */
switch(c->id) {
case V4L2_CID_BRIGHTNESS:
/***
* Don't let the register be set to zero - bug in VP4
* flash of full brightness
***/
if (cam->params.pnp_id.device_type == DEVICE_STV_672)
c->minimum = 1;
break;
case V4L2_CID_VFLIP:
// VP5 Only
if(cam->params.pnp_id.device_type == DEVICE_STV_672)
c->flags |= V4L2_CTRL_FLAG_DISABLED;
break;
case CPIA2_CID_FRAMERATE:
if(cam->params.pnp_id.device_type == DEVICE_STV_672 &&
cam->params.version.sensor_flags==CPIA2_VP_SENSOR_FLAGS_500){
// Maximum 15fps
for(i=0; i<c->maximum; ++i) {
if(framerate_controls[i].value ==
CPIA2_VP_FRAMERATE_15) {
c->maximum = i;
c->default_value = i;
}
}
}
break;
case CPIA2_CID_FLICKER_MODE:
// Flicker control only valid for 672.
if(cam->params.pnp_id.device_type != DEVICE_STV_672)
c->flags |= V4L2_CTRL_FLAG_DISABLED;
break;
case CPIA2_CID_LIGHTS:
// Light control only valid for the QX5 Microscope.
if(cam->params.pnp_id.product != 0x151)
c->flags |= V4L2_CTRL_FLAG_DISABLED;
break;
default:
break;
}
return 0;
}
/******************************************************************************
*
* ioctl_querymenu
*
* V4L2 query possible control variables
*
*****************************************************************************/
static int ioctl_querymenu(void *arg,struct camera_data *cam)
{
struct v4l2_querymenu *m = arg;
memset(m->name, 0, sizeof(m->name));
m->reserved = 0;
switch(m->id) {
case CPIA2_CID_FLICKER_MODE:
if (m->index >= NUM_FLICKER_CONTROLS)
return -EINVAL;
strcpy(m->name, flicker_controls[m->index].name);
break;
case CPIA2_CID_FRAMERATE:
{
int maximum = NUM_FRAMERATE_CONTROLS - 1;
if(cam->params.pnp_id.device_type == DEVICE_STV_672 &&
cam->params.version.sensor_flags==CPIA2_VP_SENSOR_FLAGS_500){
// Maximum 15fps
int i;
for(i=0; i<maximum; ++i) {
if(framerate_controls[i].value ==
CPIA2_VP_FRAMERATE_15)
maximum = i;
}
}
if (m->index > maximum)
return -EINVAL;
strcpy(m->name, framerate_controls[m->index].name);
break;
}
case CPIA2_CID_LIGHTS:
if (m->index >= NUM_LIGHTS_CONTROLS)
return -EINVAL;
strcpy(m->name, lights_controls[m->index].name);
break;
default:
return -EINVAL;
}
return 0;
}
/******************************************************************************
*
* ioctl_g_ctrl
*
* V4L2 get the value of a control variable
*
*****************************************************************************/
static int ioctl_g_ctrl(void *arg,struct camera_data *cam)
{
struct v4l2_control *c = arg;
switch(c->id) {
case V4L2_CID_BRIGHTNESS:
cpia2_do_command(cam, CPIA2_CMD_GET_VP_BRIGHTNESS,
TRANSFER_READ, 0);
c->value = cam->params.color_params.brightness;
break;
case V4L2_CID_CONTRAST:
cpia2_do_command(cam, CPIA2_CMD_GET_CONTRAST,
TRANSFER_READ, 0);
c->value = cam->params.color_params.contrast;
break;
case V4L2_CID_SATURATION:
cpia2_do_command(cam, CPIA2_CMD_GET_VP_SATURATION,
TRANSFER_READ, 0);
c->value = cam->params.color_params.saturation;
break;
case V4L2_CID_HFLIP:
cpia2_do_command(cam, CPIA2_CMD_GET_USER_EFFECTS,
TRANSFER_READ, 0);
c->value = (cam->params.vp_params.user_effects &
CPIA2_VP_USER_EFFECTS_MIRROR) != 0;
break;
case V4L2_CID_VFLIP:
cpia2_do_command(cam, CPIA2_CMD_GET_USER_EFFECTS,
TRANSFER_READ, 0);
c->value = (cam->params.vp_params.user_effects &
CPIA2_VP_USER_EFFECTS_FLIP) != 0;
break;
case CPIA2_CID_TARGET_KB:
c->value = cam->params.vc_params.target_kb;
break;
case CPIA2_CID_GPIO:
cpia2_do_command(cam, CPIA2_CMD_GET_VP_GPIO_DATA,
TRANSFER_READ, 0);
c->value = cam->params.vp_params.gpio_data;
break;
case CPIA2_CID_FLICKER_MODE:
{
int i, mode;
cpia2_do_command(cam, CPIA2_CMD_GET_FLICKER_MODES,
TRANSFER_READ, 0);
if(cam->params.flicker_control.cam_register &
CPIA2_VP_FLICKER_MODES_NEVER_FLICKER) {
mode = NEVER_FLICKER;
} else {
if(cam->params.flicker_control.cam_register &
CPIA2_VP_FLICKER_MODES_50HZ) {
mode = FLICKER_50;
} else {
mode = FLICKER_60;
}
}
for(i=0; i<NUM_FLICKER_CONTROLS; i++) {
if(flicker_controls[i].value == mode) {
c->value = i;
break;
}
}
if(i == NUM_FLICKER_CONTROLS)
return -EINVAL;
break;
}
case CPIA2_CID_FRAMERATE:
{
int maximum = NUM_FRAMERATE_CONTROLS - 1;
int i;
for(i=0; i<= maximum; i++) {
if(cam->params.vp_params.frame_rate ==
framerate_controls[i].value)
break;
}
if(i > maximum)
return -EINVAL;
c->value = i;
break;
}
case CPIA2_CID_USB_ALT:
c->value = cam->params.camera_state.stream_mode;
break;
case CPIA2_CID_LIGHTS:
{
int i;
cpia2_do_command(cam, CPIA2_CMD_GET_VP_GPIO_DATA,
TRANSFER_READ, 0);
for(i=0; i<NUM_LIGHTS_CONTROLS; i++) {
if((cam->params.vp_params.gpio_data&GPIO_LIGHTS_MASK) ==
lights_controls[i].value) {
break;
}
}
if(i == NUM_LIGHTS_CONTROLS)
return -EINVAL;
c->value = i;
break;
}
case CPIA2_CID_RESET_CAMERA:
return -EINVAL;
default:
return -EINVAL;
}
DBG("Get control id:%d, value:%d\n", c->id, c->value);
return 0;
}
/******************************************************************************
*
* ioctl_s_ctrl
*
* V4L2 set the value of a control variable
*
*****************************************************************************/
static int ioctl_s_ctrl(void *arg,struct camera_data *cam)
{
struct v4l2_control *c = arg;
int i;
int retval = 0;
DBG("Set control id:%d, value:%d\n", c->id, c->value);
/* Check that the value is in range */
for(i=0; i<NUM_CONTROLS; i++) {
if(c->id == controls[i].id) {
if(c->value < controls[i].minimum ||
c->value > controls[i].maximum) {
return -EINVAL;
}
break;
}
}
if(i == NUM_CONTROLS)
return -EINVAL;
switch(c->id) {
case V4L2_CID_BRIGHTNESS:
cpia2_set_brightness(cam, c->value);
break;
case V4L2_CID_CONTRAST:
cpia2_set_contrast(cam, c->value);
break;
case V4L2_CID_SATURATION:
cpia2_set_saturation(cam, c->value);
break;
case V4L2_CID_HFLIP:
cpia2_set_property_mirror(cam, c->value);
break;
case V4L2_CID_VFLIP:
cpia2_set_property_flip(cam, c->value);
break;
case CPIA2_CID_TARGET_KB:
retval = cpia2_set_target_kb(cam, c->value);
break;
case CPIA2_CID_GPIO:
retval = cpia2_set_gpio(cam, c->value);
break;
case CPIA2_CID_FLICKER_MODE:
retval = cpia2_set_flicker_mode(cam,
flicker_controls[c->value].value);
break;
case CPIA2_CID_FRAMERATE:
retval = cpia2_set_fps(cam, framerate_controls[c->value].value);
break;
case CPIA2_CID_USB_ALT:
retval = cpia2_usb_change_streaming_alternate(cam, c->value);
break;
case CPIA2_CID_LIGHTS:
retval = cpia2_set_gpio(cam, lights_controls[c->value].value);
break;
case CPIA2_CID_RESET_CAMERA:
cpia2_usb_stream_pause(cam);
cpia2_reset_camera(cam);
cpia2_usb_stream_resume(cam);
break;
default:
retval = -EINVAL;
}
return retval;
}
/******************************************************************************
*
* ioctl_g_jpegcomp
*
* V4L2 get the JPEG compression parameters
*
*****************************************************************************/
static int ioctl_g_jpegcomp(void *arg,struct camera_data *cam)
{
struct v4l2_jpegcompression *parms = arg;
memset(parms, 0, sizeof(*parms));
parms->quality = 80; // TODO: Can this be made meaningful?
parms->jpeg_markers = V4L2_JPEG_MARKER_DQT | V4L2_JPEG_MARKER_DRI;
if(!cam->params.compression.inhibit_htables) {
parms->jpeg_markers |= V4L2_JPEG_MARKER_DHT;
}
parms->APPn = cam->APPn;
parms->APP_len = cam->APP_len;
if(cam->APP_len > 0) {
memcpy(parms->APP_data, cam->APP_data, cam->APP_len);
parms->jpeg_markers |= V4L2_JPEG_MARKER_APP;
}
parms->COM_len = cam->COM_len;
if(cam->COM_len > 0) {
memcpy(parms->COM_data, cam->COM_data, cam->COM_len);
parms->jpeg_markers |= JPEG_MARKER_COM;
}
DBG("G_JPEGCOMP APP_len:%d COM_len:%d\n",
parms->APP_len, parms->COM_len);
return 0;
}
/******************************************************************************
*
* ioctl_s_jpegcomp
*
* V4L2 set the JPEG compression parameters
* NOTE: quality and some jpeg_markers are ignored.
*
*****************************************************************************/
static int ioctl_s_jpegcomp(void *arg,struct camera_data *cam)
{
struct v4l2_jpegcompression *parms = arg;
DBG("S_JPEGCOMP APP_len:%d COM_len:%d\n",
parms->APP_len, parms->COM_len);
cam->params.compression.inhibit_htables =
!(parms->jpeg_markers & V4L2_JPEG_MARKER_DHT);
if(parms->APP_len != 0) {
if(parms->APP_len > 0 &&
parms->APP_len <= sizeof(cam->APP_data) &&
parms->APPn >= 0 && parms->APPn <= 15) {
cam->APPn = parms->APPn;
cam->APP_len = parms->APP_len;
memcpy(cam->APP_data, parms->APP_data, parms->APP_len);
} else {
LOG("Bad APPn Params n=%d len=%d\n",
parms->APPn, parms->APP_len);
return -EINVAL;
}
} else {
cam->APP_len = 0;
}
if(parms->COM_len != 0) {
if(parms->COM_len > 0 &&
parms->COM_len <= sizeof(cam->COM_data)) {
cam->COM_len = parms->COM_len;
memcpy(cam->COM_data, parms->COM_data, parms->COM_len);
} else {
LOG("Bad COM_len=%d\n", parms->COM_len);
return -EINVAL;
}
}
return 0;
}
/******************************************************************************
*
* ioctl_reqbufs
*
* V4L2 Initiate memory mapping.
* NOTE: The user's request is ignored. For now the buffers are fixed.
*
*****************************************************************************/
static int ioctl_reqbufs(void *arg,struct camera_data *cam)
{
struct v4l2_requestbuffers *req = arg;
if(req->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
req->memory != V4L2_MEMORY_MMAP)
return -EINVAL;
DBG("REQBUFS requested:%d returning:%d\n", req->count, cam->num_frames);
req->count = cam->num_frames;
memset(&req->reserved, 0, sizeof(req->reserved));
return 0;
}
/******************************************************************************
*
* ioctl_querybuf
*
* V4L2 Query memory buffer status.
*
*****************************************************************************/
static int ioctl_querybuf(void *arg,struct camera_data *cam)
{
struct v4l2_buffer *buf = arg;
if(buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
buf->index > cam->num_frames)
return -EINVAL;
buf->m.offset = cam->buffers[buf->index].data - cam->frame_buffer;
buf->length = cam->frame_size;
buf->memory = V4L2_MEMORY_MMAP;
if(cam->mmapped)
buf->flags = V4L2_BUF_FLAG_MAPPED;
else
buf->flags = 0;
switch (cam->buffers[buf->index].status) {
case FRAME_EMPTY:
case FRAME_ERROR:
case FRAME_READING:
buf->bytesused = 0;
buf->flags = V4L2_BUF_FLAG_QUEUED;
break;
case FRAME_READY:
buf->bytesused = cam->buffers[buf->index].length;
buf->timestamp = cam->buffers[buf->index].timestamp;
buf->sequence = cam->buffers[buf->index].seq;
buf->flags = V4L2_BUF_FLAG_DONE;
break;
}
DBG("QUERYBUF index:%d offset:%d flags:%d seq:%d bytesused:%d\n",
buf->index, buf->m.offset, buf->flags, buf->sequence,
buf->bytesused);
return 0;
}
/******************************************************************************
*
* ioctl_qbuf
*
* V4L2 User is freeing buffer
*
*****************************************************************************/
static int ioctl_qbuf(void *arg,struct camera_data *cam)
{
struct v4l2_buffer *buf = arg;
if(buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
buf->memory != V4L2_MEMORY_MMAP ||
buf->index > cam->num_frames)
return -EINVAL;
DBG("QBUF #%d\n", buf->index);
if(cam->buffers[buf->index].status == FRAME_READY)
cam->buffers[buf->index].status = FRAME_EMPTY;
return 0;
}
/******************************************************************************
*
* find_earliest_filled_buffer
*
* Helper for ioctl_dqbuf. Find the next ready buffer.
*
*****************************************************************************/
static int find_earliest_filled_buffer(struct camera_data *cam)
{
int i;
int found = -1;
for (i=0; i<cam->num_frames; i++) {
if(cam->buffers[i].status == FRAME_READY) {
if(found < 0) {
found = i;
} else {
/* find which buffer is earlier */
struct timeval *tv1, *tv2;
tv1 = &cam->buffers[i].timestamp;
tv2 = &cam->buffers[found].timestamp;
if(tv1->tv_sec < tv2->tv_sec ||
(tv1->tv_sec == tv2->tv_sec &&
tv1->tv_usec < tv2->tv_usec))
found = i;
}
}
}
return found;
}
/******************************************************************************
*
* ioctl_dqbuf
*
* V4L2 User is asking for a filled buffer.
*
*****************************************************************************/
static int ioctl_dqbuf(void *arg,struct camera_data *cam, struct file *file)
{
struct v4l2_buffer *buf = arg;
int frame;
if(buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
buf->memory != V4L2_MEMORY_MMAP)
return -EINVAL;
frame = find_earliest_filled_buffer(cam);
if(frame < 0 && file->f_flags&O_NONBLOCK)
return -EAGAIN;
if(frame < 0) {
/* Wait for a frame to become available */
struct framebuf *cb=cam->curbuff;
mutex_unlock(&cam->busy_lock);
wait_event_interruptible(cam->wq_stream,
!cam->present ||
(cb=cam->curbuff)->status == FRAME_READY);
mutex_lock(&cam->busy_lock);
if (signal_pending(current))
return -ERESTARTSYS;
if(!cam->present)
return -ENOTTY;
frame = cb->num;
}
buf->index = frame;
buf->bytesused = cam->buffers[buf->index].length;
buf->flags = V4L2_BUF_FLAG_MAPPED | V4L2_BUF_FLAG_DONE;
buf->field = V4L2_FIELD_NONE;
buf->timestamp = cam->buffers[buf->index].timestamp;
buf->sequence = cam->buffers[buf->index].seq;
buf->m.offset = cam->buffers[buf->index].data - cam->frame_buffer;
buf->length = cam->frame_size;
buf->input = 0;
buf->reserved = 0;
memset(&buf->timecode, 0, sizeof(buf->timecode));
DBG("DQBUF #%d status:%d seq:%d length:%d\n", buf->index,
cam->buffers[buf->index].status, buf->sequence, buf->bytesused);
return 0;
}
/******************************************************************************
*
* cpia2_ioctl
*
*****************************************************************************/
static long cpia2_do_ioctl(struct file *file, unsigned int cmd, void *arg)
{
struct camera_data *cam = video_drvdata(file);
long retval = 0;
if (!cam)
return -ENOTTY;
/* make this _really_ smp-safe */
if (mutex_lock_interruptible(&cam->busy_lock))
return -ERESTARTSYS;
if (!cam->present) {
mutex_unlock(&cam->busy_lock);
return -ENODEV;
}
/* Priority check */
switch (cmd) {
case VIDIOC_S_FMT:
{
struct cpia2_fh *fh = file->private_data;
retval = v4l2_prio_check(&cam->prio, fh->prio);
if(retval) {
mutex_unlock(&cam->busy_lock);
return retval;
}
break;
}
#ifdef CONFIG_VIDEO_V4L1_COMPAT
case VIDIOCGMBUF:
{
struct cpia2_fh *fh = file->private_data;
if(fh->prio != V4L2_PRIORITY_RECORD) {
mutex_unlock(&cam->busy_lock);
return -EBUSY;
}
break;
}
#endif
default:
break;
}
switch (cmd) {
/* CPIA2 extension to Video4Linux API */
case CPIA2_IOC_SET_GPIO:
retval = ioctl_set_gpio(arg, cam);
break;
#ifdef CONFIG_VIDEO_V4L1_COMPAT
case VIDIOCGMBUF: /* mmap interface */
retval = ioctl_get_mbuf(arg, cam);
break;
#endif
case VIDIOC_QUERYCAP:
retval = ioctl_querycap(arg,cam);
break;
case VIDIOC_ENUMINPUT:
case VIDIOC_G_INPUT:
case VIDIOC_S_INPUT:
retval = ioctl_input(cmd, arg, cam);
break;
case VIDIOC_ENUM_FMT:
retval = ioctl_enum_fmt(arg,cam);
break;
case VIDIOC_TRY_FMT:
retval = ioctl_try_fmt(arg,cam);
break;
case VIDIOC_G_FMT:
retval = ioctl_get_fmt(arg,cam);
break;
case VIDIOC_S_FMT:
retval = ioctl_set_fmt(arg,cam,file->private_data);
break;
case VIDIOC_CROPCAP:
retval = ioctl_cropcap(arg,cam);
break;
case VIDIOC_G_CROP:
case VIDIOC_S_CROP:
// TODO: I think cropping can be implemented - SJB
retval = -EINVAL;
break;
case VIDIOC_QUERYCTRL:
retval = ioctl_queryctrl(arg,cam);
break;
case VIDIOC_QUERYMENU:
retval = ioctl_querymenu(arg,cam);
break;
case VIDIOC_G_CTRL:
retval = ioctl_g_ctrl(arg,cam);
break;
case VIDIOC_S_CTRL:
retval = ioctl_s_ctrl(arg,cam);
break;
case VIDIOC_G_JPEGCOMP:
retval = ioctl_g_jpegcomp(arg,cam);
break;
case VIDIOC_S_JPEGCOMP:
retval = ioctl_s_jpegcomp(arg,cam);
break;
case VIDIOC_G_PRIORITY:
{
struct cpia2_fh *fh = file->private_data;
*(enum v4l2_priority*)arg = fh->prio;
break;
}
case VIDIOC_S_PRIORITY:
{
struct cpia2_fh *fh = file->private_data;
enum v4l2_priority prio;
prio = *(enum v4l2_priority*)arg;
if(cam->streaming &&
prio != fh->prio &&
fh->prio == V4L2_PRIORITY_RECORD) {
/* Can't drop record priority while streaming */
retval = -EBUSY;
} else if(prio == V4L2_PRIORITY_RECORD &&
prio != fh->prio &&
v4l2_prio_max(&cam->prio) == V4L2_PRIORITY_RECORD) {
/* Only one program can record at a time */
retval = -EBUSY;
} else {
retval = v4l2_prio_change(&cam->prio, &fh->prio, prio);
}
break;
}
case VIDIOC_REQBUFS:
retval = ioctl_reqbufs(arg,cam);
break;
case VIDIOC_QUERYBUF:
retval = ioctl_querybuf(arg,cam);
break;
case VIDIOC_QBUF:
retval = ioctl_qbuf(arg,cam);
break;
case VIDIOC_DQBUF:
retval = ioctl_dqbuf(arg,cam,file);
break;
case VIDIOC_STREAMON:
{
int type;
DBG("VIDIOC_STREAMON, streaming=%d\n", cam->streaming);
type = *(int*)arg;
if(!cam->mmapped || type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
retval = -EINVAL;
if(!cam->streaming) {
retval = cpia2_usb_stream_start(cam,
cam->params.camera_state.stream_mode);
} else {
retval = -EINVAL;
}
break;
}
case VIDIOC_STREAMOFF:
{
int type;
DBG("VIDIOC_STREAMOFF, streaming=%d\n", cam->streaming);
type = *(int*)arg;
if(!cam->mmapped || type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
retval = -EINVAL;
if(cam->streaming) {
retval = cpia2_usb_stream_stop(cam);
} else {
retval = -EINVAL;
}
break;
}
case VIDIOC_ENUMOUTPUT:
case VIDIOC_G_OUTPUT:
case VIDIOC_S_OUTPUT:
case VIDIOC_G_MODULATOR:
case VIDIOC_S_MODULATOR:
case VIDIOC_ENUMAUDIO:
case VIDIOC_G_AUDIO:
case VIDIOC_S_AUDIO:
case VIDIOC_ENUMAUDOUT:
case VIDIOC_G_AUDOUT:
case VIDIOC_S_AUDOUT:
case VIDIOC_ENUMSTD:
case VIDIOC_QUERYSTD:
case VIDIOC_G_STD:
case VIDIOC_S_STD:
case VIDIOC_G_TUNER:
case VIDIOC_S_TUNER:
case VIDIOC_G_FREQUENCY:
case VIDIOC_S_FREQUENCY:
case VIDIOC_OVERLAY:
case VIDIOC_G_FBUF:
case VIDIOC_S_FBUF:
case VIDIOC_G_PARM:
case VIDIOC_S_PARM:
retval = -EINVAL;
break;
default:
retval = -ENOIOCTLCMD;
break;
}
mutex_unlock(&cam->busy_lock);
return retval;
}
static long cpia2_ioctl(struct file *file,
unsigned int cmd, unsigned long arg)
{
return video_usercopy(file, cmd, arg, cpia2_do_ioctl);
}
/******************************************************************************
*
* cpia2_mmap
*
*****************************************************************************/
static int cpia2_mmap(struct file *file, struct vm_area_struct *area)
{
struct camera_data *cam = video_drvdata(file);
int retval;
/* Priority check */
struct cpia2_fh *fh = file->private_data;
if(fh->prio != V4L2_PRIORITY_RECORD) {
return -EBUSY;
}
retval = cpia2_remap_buffer(cam, area);
if(!retval)
fh->mmapped = 1;
return retval;
}
/******************************************************************************
*
* reset_camera_struct_v4l
*
* Sets all values to the defaults
*****************************************************************************/
static void reset_camera_struct_v4l(struct camera_data *cam)
{
cam->width = cam->params.roi.width;
cam->height = cam->params.roi.height;
cam->frame_size = buffer_size;
cam->num_frames = num_buffers;
/* FlickerModes */
cam->params.flicker_control.flicker_mode_req = flicker_mode;
cam->params.flicker_control.mains_frequency = flicker_freq;
/* streamMode */
cam->params.camera_state.stream_mode = alternate;
cam->pixelformat = V4L2_PIX_FMT_JPEG;
v4l2_prio_init(&cam->prio);
}
/***
* The v4l video device structure initialized for this device
***/
static const struct v4l2_file_operations cpia2_fops = {
.owner = THIS_MODULE,
.open = cpia2_open,
.release = cpia2_close,
.read = cpia2_v4l_read,
.poll = cpia2_v4l_poll,
.ioctl = cpia2_ioctl,
.mmap = cpia2_mmap,
};
static struct video_device cpia2_template = {
/* I could not find any place for the old .initialize initializer?? */
.name = "CPiA2 Camera",
.fops = &cpia2_fops,
.release = video_device_release,
};
/******************************************************************************
*
* cpia2_register_camera
*
*****************************************************************************/
int cpia2_register_camera(struct camera_data *cam)
{
cam->vdev = video_device_alloc();
if(!cam->vdev)
return -ENOMEM;
memcpy(cam->vdev, &cpia2_template, sizeof(cpia2_template));
video_set_drvdata(cam->vdev, cam);
reset_camera_struct_v4l(cam);
/* register v4l device */
if (video_register_device(cam->vdev, VFL_TYPE_GRABBER, video_nr) < 0) {
ERR("video_register_device failed\n");
video_device_release(cam->vdev);
return -ENODEV;
}
return 0;
}
/******************************************************************************
*
* cpia2_unregister_camera
*
*****************************************************************************/
void cpia2_unregister_camera(struct camera_data *cam)
{
if (!cam->open_count) {
video_unregister_device(cam->vdev);
} else {
LOG("%s removed while open, deferring "
"video_unregister_device\n",
video_device_node_name(cam->vdev));
}
}
/******************************************************************************
*
* check_parameters
*
* Make sure that all user-supplied parameters are sensible
*****************************************************************************/
static void __init check_parameters(void)
{
if(buffer_size < PAGE_SIZE) {
buffer_size = PAGE_SIZE;
LOG("buffer_size too small, setting to %d\n", buffer_size);
} else if(buffer_size > 1024*1024) {
/* arbitrary upper limiit */
buffer_size = 1024*1024;
LOG("buffer_size ridiculously large, setting to %d\n",
buffer_size);
} else {
buffer_size += PAGE_SIZE-1;
buffer_size &= ~(PAGE_SIZE-1);
}
if(num_buffers < 1) {
num_buffers = 1;
LOG("num_buffers too small, setting to %d\n", num_buffers);
} else if(num_buffers > VIDEO_MAX_FRAME) {
num_buffers = VIDEO_MAX_FRAME;
LOG("num_buffers too large, setting to %d\n", num_buffers);
}
if(alternate < USBIF_ISO_1 || alternate > USBIF_ISO_6) {
alternate = DEFAULT_ALT;
LOG("alternate specified is invalid, using %d\n", alternate);
}
if (flicker_mode != NEVER_FLICKER && flicker_mode != ANTI_FLICKER_ON) {
flicker_mode = NEVER_FLICKER;
LOG("Flicker mode specified is invalid, using %d\n",
flicker_mode);
}
if (flicker_freq != FLICKER_50 && flicker_freq != FLICKER_60) {
flicker_freq = FLICKER_60;
LOG("Flicker mode specified is invalid, using %d\n",
flicker_freq);
}
if(video_nr < -1 || video_nr > 64) {
video_nr = -1;
LOG("invalid video_nr specified, must be -1 to 64\n");
}
DBG("Using %d buffers, each %d bytes, alternate=%d\n",
num_buffers, buffer_size, alternate);
}
/************ Module Stuff ***************/
/******************************************************************************
*
* cpia2_init/module_init
*
*****************************************************************************/
static int __init cpia2_init(void)
{
LOG("%s v%d.%d.%d\n",
ABOUT, CPIA2_MAJ_VER, CPIA2_MIN_VER, CPIA2_PATCH_VER);
check_parameters();
cpia2_usb_init();
return 0;
}
/******************************************************************************
*
* cpia2_exit/module_exit
*
*****************************************************************************/
static void __exit cpia2_exit(void)
{
cpia2_usb_cleanup();
schedule_timeout(2 * HZ);
}
module_init(cpia2_init);
module_exit(cpia2_exit);