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kernel-fxtec-pro1x/drivers/media/video/zc0301/zc0301_core.c
Mauro Carvalho Chehab 22c4a4e98e V4L/DVB (6320): v4l core: remove the unused .hardware V4L1 field 
struct video_device used to define a .hardware field. While
initialized on severl drivers, this field is never used inside V4L.
However, drivers using it need to include the old V4L1 header.

This seems to cause compilation troubles with some random configs.
Better just to remove it from all drivers.

Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
2007-10-22 12:01:24 -02:00

2093 lines
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/***************************************************************************
* Video4Linux2 driver for ZC0301[P] Image Processor and Control Chip *
* *
* Copyright (C) 2006-2007 by Luca Risolia <luca.risolia@studio.unibo.it> *
* *
* Informations about the chip internals needed to enable the I2C protocol *
* have been taken from the documentation of the ZC030x Video4Linux1 *
* driver written by Andrew Birkett <andy@nobugs.org> *
* *
* 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. *
***************************************************************************/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/param.h>
#include <linux/errno.h>
#include <linux/slab.h>
#include <linux/device.h>
#include <linux/fs.h>
#include <linux/delay.h>
#include <linux/compiler.h>
#include <linux/ioctl.h>
#include <linux/poll.h>
#include <linux/stat.h>
#include <linux/mm.h>
#include <linux/vmalloc.h>
#include <linux/page-flags.h>
#include <linux/byteorder/generic.h>
#include <asm/page.h>
#include <asm/uaccess.h>
#include "zc0301.h"
/*****************************************************************************/
#define ZC0301_MODULE_NAME "V4L2 driver for ZC0301[P] " \
"Image Processor and Control Chip"
#define ZC0301_MODULE_AUTHOR "(C) 2006-2007 Luca Risolia"
#define ZC0301_AUTHOR_EMAIL "<luca.risolia@studio.unibo.it>"
#define ZC0301_MODULE_LICENSE "GPL"
#define ZC0301_MODULE_VERSION "1:1.10"
#define ZC0301_MODULE_VERSION_CODE KERNEL_VERSION(1, 1, 10)
/*****************************************************************************/
MODULE_DEVICE_TABLE(usb, zc0301_id_table);
MODULE_AUTHOR(ZC0301_MODULE_AUTHOR " " ZC0301_AUTHOR_EMAIL);
MODULE_DESCRIPTION(ZC0301_MODULE_NAME);
MODULE_VERSION(ZC0301_MODULE_VERSION);
MODULE_LICENSE(ZC0301_MODULE_LICENSE);
static short video_nr[] = {[0 ... ZC0301_MAX_DEVICES-1] = -1};
module_param_array(video_nr, short, NULL, 0444);
MODULE_PARM_DESC(video_nr,
"\n<-1|n[,...]> Specify V4L2 minor mode number."
"\n -1 = use next available (default)"
"\n n = use minor number n (integer >= 0)"
"\nYou can specify up to "
__MODULE_STRING(ZC0301_MAX_DEVICES) " cameras this way."
"\nFor example:"
"\nvideo_nr=-1,2,-1 would assign minor number 2 to"
"\nthe second registered camera and use auto for the first"
"\none and for every other camera."
"\n");
static short force_munmap[] = {[0 ... ZC0301_MAX_DEVICES-1] =
ZC0301_FORCE_MUNMAP};
module_param_array(force_munmap, bool, NULL, 0444);
MODULE_PARM_DESC(force_munmap,
"\n<0|1[,...]> Force the application to unmap previously"
"\nmapped buffer memory before calling any VIDIOC_S_CROP or"
"\nVIDIOC_S_FMT ioctl's. Not all the applications support"
"\nthis feature. This parameter is specific for each"
"\ndetected camera."
"\n 0 = do not force memory unmapping"
"\n 1 = force memory unmapping (save memory)"
"\nDefault value is "__MODULE_STRING(ZC0301_FORCE_MUNMAP)"."
"\n");
static unsigned int frame_timeout[] = {[0 ... ZC0301_MAX_DEVICES-1] =
ZC0301_FRAME_TIMEOUT};
module_param_array(frame_timeout, uint, NULL, 0644);
MODULE_PARM_DESC(frame_timeout,
"\n<n[,...]> Timeout for a video frame in seconds."
"\nThis parameter is specific for each detected camera."
"\nDefault value is "__MODULE_STRING(ZC0301_FRAME_TIMEOUT)"."
"\n");
#ifdef ZC0301_DEBUG
static unsigned short debug = ZC0301_DEBUG_LEVEL;
module_param(debug, ushort, 0644);
MODULE_PARM_DESC(debug,
"\n<n> Debugging information level, from 0 to 3:"
"\n0 = none (use carefully)"
"\n1 = critical errors"
"\n2 = significant informations"
"\n3 = more verbose messages"
"\nLevel 3 is useful for testing only, when only "
"one device is used."
"\nDefault value is "__MODULE_STRING(ZC0301_DEBUG_LEVEL)"."
"\n");
#endif
/*****************************************************************************/
static u32
zc0301_request_buffers(struct zc0301_device* cam, u32 count,
enum zc0301_io_method io)
{
struct v4l2_pix_format* p = &(cam->sensor.pix_format);
struct v4l2_rect* r = &(cam->sensor.cropcap.bounds);
const size_t imagesize = cam->module_param.force_munmap ||
io == IO_READ ?
(p->width * p->height * p->priv) / 8 :
(r->width * r->height * p->priv) / 8;
void* buff = NULL;
u32 i;
if (count > ZC0301_MAX_FRAMES)
count = ZC0301_MAX_FRAMES;
cam->nbuffers = count;
while (cam->nbuffers > 0) {
if ((buff = vmalloc_32_user(cam->nbuffers *
PAGE_ALIGN(imagesize))))
break;
cam->nbuffers--;
}
for (i = 0; i < cam->nbuffers; i++) {
cam->frame[i].bufmem = buff + i*PAGE_ALIGN(imagesize);
cam->frame[i].buf.index = i;
cam->frame[i].buf.m.offset = i*PAGE_ALIGN(imagesize);
cam->frame[i].buf.length = imagesize;
cam->frame[i].buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
cam->frame[i].buf.sequence = 0;
cam->frame[i].buf.field = V4L2_FIELD_NONE;
cam->frame[i].buf.memory = V4L2_MEMORY_MMAP;
cam->frame[i].buf.flags = 0;
}
return cam->nbuffers;
}
static void zc0301_release_buffers(struct zc0301_device* cam)
{
if (cam->nbuffers) {
vfree(cam->frame[0].bufmem);
cam->nbuffers = 0;
}
cam->frame_current = NULL;
}
static void zc0301_empty_framequeues(struct zc0301_device* cam)
{
u32 i;
INIT_LIST_HEAD(&cam->inqueue);
INIT_LIST_HEAD(&cam->outqueue);
for (i = 0; i < ZC0301_MAX_FRAMES; i++) {
cam->frame[i].state = F_UNUSED;
cam->frame[i].buf.bytesused = 0;
}
}
static void zc0301_requeue_outqueue(struct zc0301_device* cam)
{
struct zc0301_frame_t *i;
list_for_each_entry(i, &cam->outqueue, frame) {
i->state = F_QUEUED;
list_add(&i->frame, &cam->inqueue);
}
INIT_LIST_HEAD(&cam->outqueue);
}
static void zc0301_queue_unusedframes(struct zc0301_device* cam)
{
unsigned long lock_flags;
u32 i;
for (i = 0; i < cam->nbuffers; i++)
if (cam->frame[i].state == F_UNUSED) {
cam->frame[i].state = F_QUEUED;
spin_lock_irqsave(&cam->queue_lock, lock_flags);
list_add_tail(&cam->frame[i].frame, &cam->inqueue);
spin_unlock_irqrestore(&cam->queue_lock, lock_flags);
}
}
/*****************************************************************************/
int zc0301_write_reg(struct zc0301_device* cam, u16 index, u16 value)
{
struct usb_device* udev = cam->usbdev;
int res;
res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0xa0, 0x40,
value, index, NULL, 0, ZC0301_CTRL_TIMEOUT);
if (res < 0) {
DBG(3, "Failed to write a register (index 0x%04X, "
"value 0x%02X, error %d)",index, value, res);
return -1;
}
return 0;
}
int zc0301_read_reg(struct zc0301_device* cam, u16 index)
{
struct usb_device* udev = cam->usbdev;
u8* buff = cam->control_buffer;
int res;
res = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), 0xa1, 0xc0,
0x0001, index, buff, 1, ZC0301_CTRL_TIMEOUT);
if (res < 0)
DBG(3, "Failed to read a register (index 0x%04X, error %d)",
index, res);
PDBGG("Read: index 0x%04X, value: 0x%04X", index, (int)(*buff));
return (res >= 0) ? (int)(*buff) : -1;
}
int zc0301_i2c_read(struct zc0301_device* cam, u16 address, u8 length)
{
int err = 0, res, r0, r1;
err += zc0301_write_reg(cam, 0x0092, address);
err += zc0301_write_reg(cam, 0x0090, 0x02);
msleep(1);
res = zc0301_read_reg(cam, 0x0091);
if (res < 0)
err += res;
r0 = zc0301_read_reg(cam, 0x0095);
if (r0 < 0)
err += r0;
r1 = zc0301_read_reg(cam, 0x0096);
if (r1 < 0)
err += r1;
res = (length <= 1) ? r0 : r0 | (r1 << 8);
if (err)
DBG(3, "I2C read failed at address 0x%04X, value: 0x%04X",
address, res);
PDBGG("I2C read: address 0x%04X, value: 0x%04X", address, res);
return err ? -1 : res;
}
int zc0301_i2c_write(struct zc0301_device* cam, u16 address, u16 value)
{
int err = 0, res;
err += zc0301_write_reg(cam, 0x0092, address);
err += zc0301_write_reg(cam, 0x0093, value & 0xff);
err += zc0301_write_reg(cam, 0x0094, value >> 8);
err += zc0301_write_reg(cam, 0x0090, 0x01);
msleep(1);
res = zc0301_read_reg(cam, 0x0091);
if (res < 0)
err += res;
if (err)
DBG(3, "I2C write failed at address 0x%04X, value: 0x%04X",
address, value);
PDBGG("I2C write: address 0x%04X, value: 0x%04X", address, value);
return err ? -1 : 0;
}
/*****************************************************************************/
static void zc0301_urb_complete(struct urb *urb)
{
struct zc0301_device* cam = urb->context;
struct zc0301_frame_t** f;
size_t imagesize;
u8 i;
int err = 0;
if (urb->status == -ENOENT)
return;
f = &cam->frame_current;
if (cam->stream == STREAM_INTERRUPT) {
cam->stream = STREAM_OFF;
if ((*f))
(*f)->state = F_QUEUED;
DBG(3, "Stream interrupted");
wake_up(&cam->wait_stream);
}
if (cam->state & DEV_DISCONNECTED)
return;
if (cam->state & DEV_MISCONFIGURED) {
wake_up_interruptible(&cam->wait_frame);
return;
}
if (cam->stream == STREAM_OFF || list_empty(&cam->inqueue))
goto resubmit_urb;
if (!(*f))
(*f) = list_entry(cam->inqueue.next, struct zc0301_frame_t,
frame);
imagesize = (cam->sensor.pix_format.width *
cam->sensor.pix_format.height *
cam->sensor.pix_format.priv) / 8;
for (i = 0; i < urb->number_of_packets; i++) {
unsigned int len, status;
void *pos;
u16* soi;
u8 sof;
len = urb->iso_frame_desc[i].actual_length;
status = urb->iso_frame_desc[i].status;
pos = urb->iso_frame_desc[i].offset + urb->transfer_buffer;
if (status) {
DBG(3, "Error in isochronous frame");
(*f)->state = F_ERROR;
continue;
}
sof = (*(soi = pos) == 0xd8ff);
PDBGG("Isochrnous frame: length %u, #%u i,", len, i);
if ((*f)->state == F_QUEUED || (*f)->state == F_ERROR)
start_of_frame:
if (sof) {
(*f)->state = F_GRABBING;
(*f)->buf.bytesused = 0;
do_gettimeofday(&(*f)->buf.timestamp);
DBG(3, "SOF detected: new video frame");
}
if ((*f)->state == F_GRABBING) {
if (sof && (*f)->buf.bytesused)
goto end_of_frame;
if ((*f)->buf.bytesused + len > imagesize) {
DBG(3, "Video frame size exceeded");
(*f)->state = F_ERROR;
continue;
}
memcpy((*f)->bufmem+(*f)->buf.bytesused, pos, len);
(*f)->buf.bytesused += len;
if ((*f)->buf.bytesused == imagesize) {
u32 b;
end_of_frame:
b = (*f)->buf.bytesused;
(*f)->state = F_DONE;
(*f)->buf.sequence= ++cam->frame_count;
spin_lock(&cam->queue_lock);
list_move_tail(&(*f)->frame, &cam->outqueue);
if (!list_empty(&cam->inqueue))
(*f) = list_entry(cam->inqueue.next,
struct zc0301_frame_t,
frame);
else
(*f) = NULL;
spin_unlock(&cam->queue_lock);
DBG(3, "Video frame captured: : %lu bytes",
(unsigned long)(b));
if (!(*f))
goto resubmit_urb;
if (sof)
goto start_of_frame;
}
}
}
resubmit_urb:
urb->dev = cam->usbdev;
err = usb_submit_urb(urb, GFP_ATOMIC);
if (err < 0 && err != -EPERM) {
cam->state |= DEV_MISCONFIGURED;
DBG(1, "usb_submit_urb() failed");
}
wake_up_interruptible(&cam->wait_frame);
}
static int zc0301_start_transfer(struct zc0301_device* cam)
{
struct usb_device *udev = cam->usbdev;
struct usb_host_interface* altsetting = usb_altnum_to_altsetting(
usb_ifnum_to_if(udev, 0),
ZC0301_ALTERNATE_SETTING);
const unsigned int psz = le16_to_cpu(altsetting->
endpoint[0].desc.wMaxPacketSize);
struct urb* urb;
s8 i, j;
int err = 0;
for (i = 0; i < ZC0301_URBS; i++) {
cam->transfer_buffer[i] = kzalloc(ZC0301_ISO_PACKETS * psz,
GFP_KERNEL);
if (!cam->transfer_buffer[i]) {
err = -ENOMEM;
DBG(1, "Not enough memory");
goto free_buffers;
}
}
for (i = 0; i < ZC0301_URBS; i++) {
urb = usb_alloc_urb(ZC0301_ISO_PACKETS, GFP_KERNEL);
cam->urb[i] = urb;
if (!urb) {
err = -ENOMEM;
DBG(1, "usb_alloc_urb() failed");
goto free_urbs;
}
urb->dev = udev;
urb->context = cam;
urb->pipe = usb_rcvisocpipe(udev, 1);
urb->transfer_flags = URB_ISO_ASAP;
urb->number_of_packets = ZC0301_ISO_PACKETS;
urb->complete = zc0301_urb_complete;
urb->transfer_buffer = cam->transfer_buffer[i];
urb->transfer_buffer_length = psz * ZC0301_ISO_PACKETS;
urb->interval = 1;
for (j = 0; j < ZC0301_ISO_PACKETS; j++) {
urb->iso_frame_desc[j].offset = psz * j;
urb->iso_frame_desc[j].length = psz;
}
}
err = usb_set_interface(udev, 0, ZC0301_ALTERNATE_SETTING);
if (err) {
DBG(1, "usb_set_interface() failed");
goto free_urbs;
}
cam->frame_current = NULL;
for (i = 0; i < ZC0301_URBS; i++) {
err = usb_submit_urb(cam->urb[i], GFP_KERNEL);
if (err) {
for (j = i-1; j >= 0; j--)
usb_kill_urb(cam->urb[j]);
DBG(1, "usb_submit_urb() failed, error %d", err);
goto free_urbs;
}
}
return 0;
free_urbs:
for (i = 0; (i < ZC0301_URBS) && cam->urb[i]; i++)
usb_free_urb(cam->urb[i]);
free_buffers:
for (i = 0; (i < ZC0301_URBS) && cam->transfer_buffer[i]; i++)
kfree(cam->transfer_buffer[i]);
return err;
}
static int zc0301_stop_transfer(struct zc0301_device* cam)
{
struct usb_device *udev = cam->usbdev;
s8 i;
int err = 0;
if (cam->state & DEV_DISCONNECTED)
return 0;
for (i = ZC0301_URBS-1; i >= 0; i--) {
usb_kill_urb(cam->urb[i]);
usb_free_urb(cam->urb[i]);
kfree(cam->transfer_buffer[i]);
}
err = usb_set_interface(udev, 0, 0); /* 0 Mb/s */
if (err)
DBG(3, "usb_set_interface() failed");
return err;
}
static int zc0301_stream_interrupt(struct zc0301_device* cam)
{
long timeout;
cam->stream = STREAM_INTERRUPT;
timeout = wait_event_timeout(cam->wait_stream,
(cam->stream == STREAM_OFF) ||
(cam->state & DEV_DISCONNECTED),
ZC0301_URB_TIMEOUT);
if (cam->state & DEV_DISCONNECTED)
return -ENODEV;
else if (cam->stream != STREAM_OFF) {
cam->state |= DEV_MISCONFIGURED;
DBG(1, "URB timeout reached. The camera is misconfigured. To "
"use it, close and open /dev/video%d again.",
cam->v4ldev->minor);
return -EIO;
}
return 0;
}
/*****************************************************************************/
static int
zc0301_set_compression(struct zc0301_device* cam,
struct v4l2_jpegcompression* compression)
{
int r, err = 0;
if ((r = zc0301_read_reg(cam, 0x0008)) < 0)
err += r;
err += zc0301_write_reg(cam, 0x0008, r | 0x11 | compression->quality);
return err ? -EIO : 0;
}
static int zc0301_init(struct zc0301_device* cam)
{
struct zc0301_sensor* s = &cam->sensor;
struct v4l2_control ctrl;
struct v4l2_queryctrl *qctrl;
struct v4l2_rect* rect;
u8 i = 0;
int err = 0;
if (!(cam->state & DEV_INITIALIZED)) {
mutex_init(&cam->open_mutex);
init_waitqueue_head(&cam->wait_open);
qctrl = s->qctrl;
rect = &(s->cropcap.defrect);
cam->compression.quality = ZC0301_COMPRESSION_QUALITY;
} else { /* use current values */
qctrl = s->_qctrl;
rect = &(s->_rect);
}
if (s->init) {
err = s->init(cam);
if (err) {
DBG(3, "Sensor initialization failed");
return err;
}
}
if ((err = zc0301_set_compression(cam, &cam->compression))) {
DBG(3, "set_compression() failed");
return err;
}
if (s->set_crop)
if ((err = s->set_crop(cam, rect))) {
DBG(3, "set_crop() failed");
return err;
}
if (s->set_ctrl) {
for (i = 0; i < ARRAY_SIZE(s->qctrl); i++)
if (s->qctrl[i].id != 0 &&
!(s->qctrl[i].flags & V4L2_CTRL_FLAG_DISABLED)) {
ctrl.id = s->qctrl[i].id;
ctrl.value = qctrl[i].default_value;
err = s->set_ctrl(cam, &ctrl);
if (err) {
DBG(3, "Set %s control failed",
s->qctrl[i].name);
return err;
}
DBG(3, "Image sensor supports '%s' control",
s->qctrl[i].name);
}
}
if (!(cam->state & DEV_INITIALIZED)) {
mutex_init(&cam->fileop_mutex);
spin_lock_init(&cam->queue_lock);
init_waitqueue_head(&cam->wait_frame);
init_waitqueue_head(&cam->wait_stream);
cam->nreadbuffers = 2;
memcpy(s->_qctrl, s->qctrl, sizeof(s->qctrl));
memcpy(&(s->_rect), &(s->cropcap.defrect),
sizeof(struct v4l2_rect));
cam->state |= DEV_INITIALIZED;
}
DBG(2, "Initialization succeeded");
return 0;
}
/*****************************************************************************/
static void zc0301_release_resources(struct kref *kref)
{
struct zc0301_device *cam = container_of(kref, struct zc0301_device,
kref);
DBG(2, "V4L2 device /dev/video%d deregistered", cam->v4ldev->minor);
video_set_drvdata(cam->v4ldev, NULL);
video_unregister_device(cam->v4ldev);
usb_put_dev(cam->usbdev);
kfree(cam->control_buffer);
kfree(cam);
}
static int zc0301_open(struct inode* inode, struct file* filp)
{
struct zc0301_device* cam;
int err = 0;
if (!down_read_trylock(&zc0301_dev_lock))
return -EAGAIN;
cam = video_get_drvdata(video_devdata(filp));
if (wait_for_completion_interruptible(&cam->probe)) {
up_read(&zc0301_dev_lock);
return -ERESTARTSYS;
}
kref_get(&cam->kref);
if (mutex_lock_interruptible(&cam->open_mutex)) {
kref_put(&cam->kref, zc0301_release_resources);
up_read(&zc0301_dev_lock);
return -ERESTARTSYS;
}
if (cam->state & DEV_DISCONNECTED) {
DBG(1, "Device not present");
err = -ENODEV;
goto out;
}
if (cam->users) {
DBG(2, "Device /dev/video%d is busy...", cam->v4ldev->minor);
DBG(3, "Simultaneous opens are not supported");
if ((filp->f_flags & O_NONBLOCK) ||
(filp->f_flags & O_NDELAY)) {
err = -EWOULDBLOCK;
goto out;
}
DBG(2, "A blocking open() has been requested. Wait for the "
"device to be released...");
up_read(&zc0301_dev_lock);
err = wait_event_interruptible_exclusive(cam->wait_open,
(cam->state & DEV_DISCONNECTED)
|| !cam->users);
down_read(&zc0301_dev_lock);
if (err)
goto out;
if (cam->state & DEV_DISCONNECTED) {
err = -ENODEV;
goto out;
}
}
if (cam->state & DEV_MISCONFIGURED) {
err = zc0301_init(cam);
if (err) {
DBG(1, "Initialization failed again. "
"I will retry on next open().");
goto out;
}
cam->state &= ~DEV_MISCONFIGURED;
}
if ((err = zc0301_start_transfer(cam)))
goto out;
filp->private_data = cam;
cam->users++;
cam->io = IO_NONE;
cam->stream = STREAM_OFF;
cam->nbuffers = 0;
cam->frame_count = 0;
zc0301_empty_framequeues(cam);
DBG(3, "Video device /dev/video%d is open", cam->v4ldev->minor);
out:
mutex_unlock(&cam->open_mutex);
if (err)
kref_put(&cam->kref, zc0301_release_resources);
up_read(&zc0301_dev_lock);
return err;
}
static int zc0301_release(struct inode* inode, struct file* filp)
{
struct zc0301_device* cam;
down_write(&zc0301_dev_lock);
cam = video_get_drvdata(video_devdata(filp));
zc0301_stop_transfer(cam);
zc0301_release_buffers(cam);
cam->users--;
wake_up_interruptible_nr(&cam->wait_open, 1);
DBG(3, "Video device /dev/video%d closed", cam->v4ldev->minor);
kref_put(&cam->kref, zc0301_release_resources);
up_write(&zc0301_dev_lock);
return 0;
}
static ssize_t
zc0301_read(struct file* filp, char __user * buf, size_t count, loff_t* f_pos)
{
struct zc0301_device* cam = video_get_drvdata(video_devdata(filp));
struct zc0301_frame_t* f, * i;
unsigned long lock_flags;
long timeout;
int err = 0;
if (mutex_lock_interruptible(&cam->fileop_mutex))
return -ERESTARTSYS;
if (cam->state & DEV_DISCONNECTED) {
DBG(1, "Device not present");
mutex_unlock(&cam->fileop_mutex);
return -ENODEV;
}
if (cam->state & DEV_MISCONFIGURED) {
DBG(1, "The camera is misconfigured. Close and open it "
"again.");
mutex_unlock(&cam->fileop_mutex);
return -EIO;
}
if (cam->io == IO_MMAP) {
DBG(3, "Close and open the device again to choose the read "
"method");
mutex_unlock(&cam->fileop_mutex);
return -EBUSY;
}
if (cam->io == IO_NONE) {
if (!zc0301_request_buffers(cam, cam->nreadbuffers, IO_READ)) {
DBG(1, "read() failed, not enough memory");
mutex_unlock(&cam->fileop_mutex);
return -ENOMEM;
}
cam->io = IO_READ;
cam->stream = STREAM_ON;
}
if (list_empty(&cam->inqueue)) {
if (!list_empty(&cam->outqueue))
zc0301_empty_framequeues(cam);
zc0301_queue_unusedframes(cam);
}
if (!count) {
mutex_unlock(&cam->fileop_mutex);
return 0;
}
if (list_empty(&cam->outqueue)) {
if (filp->f_flags & O_NONBLOCK) {
mutex_unlock(&cam->fileop_mutex);
return -EAGAIN;
}
timeout = wait_event_interruptible_timeout
( cam->wait_frame,
(!list_empty(&cam->outqueue)) ||
(cam->state & DEV_DISCONNECTED) ||
(cam->state & DEV_MISCONFIGURED),
cam->module_param.frame_timeout *
1000 * msecs_to_jiffies(1) );
if (timeout < 0) {
mutex_unlock(&cam->fileop_mutex);
return timeout;
}
if (cam->state & DEV_DISCONNECTED) {
mutex_unlock(&cam->fileop_mutex);
return -ENODEV;
}
if (!timeout || (cam->state & DEV_MISCONFIGURED)) {
mutex_unlock(&cam->fileop_mutex);
return -EIO;
}
}
f = list_entry(cam->outqueue.prev, struct zc0301_frame_t, frame);
if (count > f->buf.bytesused)
count = f->buf.bytesused;
if (copy_to_user(buf, f->bufmem, count)) {
err = -EFAULT;
goto exit;
}
*f_pos += count;
exit:
spin_lock_irqsave(&cam->queue_lock, lock_flags);
list_for_each_entry(i, &cam->outqueue, frame)
i->state = F_UNUSED;
INIT_LIST_HEAD(&cam->outqueue);
spin_unlock_irqrestore(&cam->queue_lock, lock_flags);
zc0301_queue_unusedframes(cam);
PDBGG("Frame #%lu, bytes read: %zu",
(unsigned long)f->buf.index, count);
mutex_unlock(&cam->fileop_mutex);
return err ? err : count;
}
static unsigned int zc0301_poll(struct file *filp, poll_table *wait)
{
struct zc0301_device* cam = video_get_drvdata(video_devdata(filp));
struct zc0301_frame_t* f;
unsigned long lock_flags;
unsigned int mask = 0;
if (mutex_lock_interruptible(&cam->fileop_mutex))
return POLLERR;
if (cam->state & DEV_DISCONNECTED) {
DBG(1, "Device not present");
goto error;
}
if (cam->state & DEV_MISCONFIGURED) {
DBG(1, "The camera is misconfigured. Close and open it "
"again.");
goto error;
}
if (cam->io == IO_NONE) {
if (!zc0301_request_buffers(cam, cam->nreadbuffers, IO_READ)) {
DBG(1, "poll() failed, not enough memory");
goto error;
}
cam->io = IO_READ;
cam->stream = STREAM_ON;
}
if (cam->io == IO_READ) {
spin_lock_irqsave(&cam->queue_lock, lock_flags);
list_for_each_entry(f, &cam->outqueue, frame)
f->state = F_UNUSED;
INIT_LIST_HEAD(&cam->outqueue);
spin_unlock_irqrestore(&cam->queue_lock, lock_flags);
zc0301_queue_unusedframes(cam);
}
poll_wait(filp, &cam->wait_frame, wait);
if (!list_empty(&cam->outqueue))
mask |= POLLIN | POLLRDNORM;
mutex_unlock(&cam->fileop_mutex);
return mask;
error:
mutex_unlock(&cam->fileop_mutex);
return POLLERR;
}
static void zc0301_vm_open(struct vm_area_struct* vma)
{
struct zc0301_frame_t* f = vma->vm_private_data;
f->vma_use_count++;
}
static void zc0301_vm_close(struct vm_area_struct* vma)
{
/* NOTE: buffers are not freed here */
struct zc0301_frame_t* f = vma->vm_private_data;
f->vma_use_count--;
}
static struct vm_operations_struct zc0301_vm_ops = {
.open = zc0301_vm_open,
.close = zc0301_vm_close,
};
static int zc0301_mmap(struct file* filp, struct vm_area_struct *vma)
{
struct zc0301_device* cam = video_get_drvdata(video_devdata(filp));
unsigned long size = vma->vm_end - vma->vm_start,
start = vma->vm_start;
void *pos;
u32 i;
if (mutex_lock_interruptible(&cam->fileop_mutex))
return -ERESTARTSYS;
if (cam->state & DEV_DISCONNECTED) {
DBG(1, "Device not present");
mutex_unlock(&cam->fileop_mutex);
return -ENODEV;
}
if (cam->state & DEV_MISCONFIGURED) {
DBG(1, "The camera is misconfigured. Close and open it "
"again.");
mutex_unlock(&cam->fileop_mutex);
return -EIO;
}
if (!(vma->vm_flags & (VM_WRITE | VM_READ))) {
mutex_unlock(&cam->fileop_mutex);
return -EACCES;
}
if (cam->io != IO_MMAP ||
size != PAGE_ALIGN(cam->frame[0].buf.length)) {
mutex_unlock(&cam->fileop_mutex);
return -EINVAL;
}
for (i = 0; i < cam->nbuffers; i++) {
if ((cam->frame[i].buf.m.offset>>PAGE_SHIFT) == vma->vm_pgoff)
break;
}
if (i == cam->nbuffers) {
mutex_unlock(&cam->fileop_mutex);
return -EINVAL;
}
vma->vm_flags |= VM_IO;
vma->vm_flags |= VM_RESERVED;
pos = cam->frame[i].bufmem;
while (size > 0) { /* size is page-aligned */
if (vm_insert_page(vma, start, vmalloc_to_page(pos))) {
mutex_unlock(&cam->fileop_mutex);
return -EAGAIN;
}
start += PAGE_SIZE;
pos += PAGE_SIZE;
size -= PAGE_SIZE;
}
vma->vm_ops = &zc0301_vm_ops;
vma->vm_private_data = &cam->frame[i];
zc0301_vm_open(vma);
mutex_unlock(&cam->fileop_mutex);
return 0;
}
/*****************************************************************************/
static int
zc0301_vidioc_querycap(struct zc0301_device* cam, void __user * arg)
{
struct v4l2_capability cap = {
.driver = "zc0301",
.version = ZC0301_MODULE_VERSION_CODE,
.capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE |
V4L2_CAP_STREAMING,
};
strlcpy(cap.card, cam->v4ldev->name, sizeof(cap.card));
if (usb_make_path(cam->usbdev, cap.bus_info, sizeof(cap.bus_info)) < 0)
strlcpy(cap.bus_info, cam->usbdev->dev.bus_id,
sizeof(cap.bus_info));
if (copy_to_user(arg, &cap, sizeof(cap)))
return -EFAULT;
return 0;
}
static int
zc0301_vidioc_enuminput(struct zc0301_device* cam, void __user * arg)
{
struct v4l2_input i;
if (copy_from_user(&i, arg, sizeof(i)))
return -EFAULT;
if (i.index)
return -EINVAL;
memset(&i, 0, sizeof(i));
strcpy(i.name, "Camera");
i.type = V4L2_INPUT_TYPE_CAMERA;
if (copy_to_user(arg, &i, sizeof(i)))
return -EFAULT;
return 0;
}
static int
zc0301_vidioc_g_input(struct zc0301_device* cam, void __user * arg)
{
int index = 0;
if (copy_to_user(arg, &index, sizeof(index)))
return -EFAULT;
return 0;
}
static int
zc0301_vidioc_s_input(struct zc0301_device* cam, void __user * arg)
{
int index;
if (copy_from_user(&index, arg, sizeof(index)))
return -EFAULT;
if (index != 0)
return -EINVAL;
return 0;
}
static int
zc0301_vidioc_query_ctrl(struct zc0301_device* cam, void __user * arg)
{
struct zc0301_sensor* s = &cam->sensor;
struct v4l2_queryctrl qc;
u8 i;
if (copy_from_user(&qc, arg, sizeof(qc)))
return -EFAULT;
for (i = 0; i < ARRAY_SIZE(s->qctrl); i++)
if (qc.id && qc.id == s->qctrl[i].id) {
memcpy(&qc, &(s->qctrl[i]), sizeof(qc));
if (copy_to_user(arg, &qc, sizeof(qc)))
return -EFAULT;
return 0;
}
return -EINVAL;
}
static int
zc0301_vidioc_g_ctrl(struct zc0301_device* cam, void __user * arg)
{
struct zc0301_sensor* s = &cam->sensor;
struct v4l2_control ctrl;
int err = 0;
u8 i;
if (!s->get_ctrl && !s->set_ctrl)
return -EINVAL;
if (copy_from_user(&ctrl, arg, sizeof(ctrl)))
return -EFAULT;
if (!s->get_ctrl) {
for (i = 0; i < ARRAY_SIZE(s->qctrl); i++)
if (ctrl.id == s->qctrl[i].id) {
ctrl.value = s->_qctrl[i].default_value;
goto exit;
}
return -EINVAL;
} else
err = s->get_ctrl(cam, &ctrl);
exit:
if (copy_to_user(arg, &ctrl, sizeof(ctrl)))
return -EFAULT;
return err;
}
static int
zc0301_vidioc_s_ctrl(struct zc0301_device* cam, void __user * arg)
{
struct zc0301_sensor* s = &cam->sensor;
struct v4l2_control ctrl;
u8 i;
int err = 0;
if (!s->set_ctrl)
return -EINVAL;
if (copy_from_user(&ctrl, arg, sizeof(ctrl)))
return -EFAULT;
for (i = 0; i < ARRAY_SIZE(s->qctrl); i++)
if (ctrl.id == s->qctrl[i].id) {
if (s->qctrl[i].flags & V4L2_CTRL_FLAG_DISABLED)
return -EINVAL;
if (ctrl.value < s->qctrl[i].minimum ||
ctrl.value > s->qctrl[i].maximum)
return -ERANGE;
ctrl.value -= ctrl.value % s->qctrl[i].step;
break;
}
if ((err = s->set_ctrl(cam, &ctrl)))
return err;
s->_qctrl[i].default_value = ctrl.value;
return 0;
}
static int
zc0301_vidioc_cropcap(struct zc0301_device* cam, void __user * arg)
{
struct v4l2_cropcap* cc = &(cam->sensor.cropcap);
cc->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
cc->pixelaspect.numerator = 1;
cc->pixelaspect.denominator = 1;
if (copy_to_user(arg, cc, sizeof(*cc)))
return -EFAULT;
return 0;
}
static int
zc0301_vidioc_g_crop(struct zc0301_device* cam, void __user * arg)
{
struct zc0301_sensor* s = &cam->sensor;
struct v4l2_crop crop = {
.type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
};
memcpy(&(crop.c), &(s->_rect), sizeof(struct v4l2_rect));
if (copy_to_user(arg, &crop, sizeof(crop)))
return -EFAULT;
return 0;
}
static int
zc0301_vidioc_s_crop(struct zc0301_device* cam, void __user * arg)
{
struct zc0301_sensor* s = &cam->sensor;
struct v4l2_crop crop;
struct v4l2_rect* rect;
struct v4l2_rect* bounds = &(s->cropcap.bounds);
const enum zc0301_stream_state stream = cam->stream;
const u32 nbuffers = cam->nbuffers;
u32 i;
int err = 0;
if (copy_from_user(&crop, arg, sizeof(crop)))
return -EFAULT;
rect = &(crop.c);
if (crop.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
return -EINVAL;
if (cam->module_param.force_munmap)
for (i = 0; i < cam->nbuffers; i++)
if (cam->frame[i].vma_use_count) {
DBG(3, "VIDIOC_S_CROP failed. "
"Unmap the buffers first.");
return -EBUSY;
}
if (!s->set_crop) {
memcpy(rect, &(s->_rect), sizeof(*rect));
if (copy_to_user(arg, &crop, sizeof(crop)))
return -EFAULT;
return 0;
}
rect->left &= ~7L;
rect->top &= ~7L;
if (rect->width < 8)
rect->width = 8;
if (rect->height < 8)
rect->height = 8;
if (rect->width > bounds->width)
rect->width = bounds->width;
if (rect->height > bounds->height)
rect->height = bounds->height;
if (rect->left < bounds->left)
rect->left = bounds->left;
if (rect->top < bounds->top)
rect->top = bounds->top;
if (rect->left + rect->width > bounds->left + bounds->width)
rect->left = bounds->left+bounds->width - rect->width;
if (rect->top + rect->height > bounds->top + bounds->height)
rect->top = bounds->top+bounds->height - rect->height;
rect->width &= ~7L;
rect->height &= ~7L;
if (cam->stream == STREAM_ON)
if ((err = zc0301_stream_interrupt(cam)))
return err;
if (copy_to_user(arg, &crop, sizeof(crop))) {
cam->stream = stream;
return -EFAULT;
}
if (cam->module_param.force_munmap || cam->io == IO_READ)
zc0301_release_buffers(cam);
if (s->set_crop)
err += s->set_crop(cam, rect);
if (err) { /* atomic, no rollback in ioctl() */
cam->state |= DEV_MISCONFIGURED;
DBG(1, "VIDIOC_S_CROP failed because of hardware problems. To "
"use the camera, close and open /dev/video%d again.",
cam->v4ldev->minor);
return -EIO;
}
s->pix_format.width = rect->width;
s->pix_format.height = rect->height;
memcpy(&(s->_rect), rect, sizeof(*rect));
if ((cam->module_param.force_munmap || cam->io == IO_READ) &&
nbuffers != zc0301_request_buffers(cam, nbuffers, cam->io)) {
cam->state |= DEV_MISCONFIGURED;
DBG(1, "VIDIOC_S_CROP failed because of not enough memory. To "
"use the camera, close and open /dev/video%d again.",
cam->v4ldev->minor);
return -ENOMEM;
}
if (cam->io == IO_READ)
zc0301_empty_framequeues(cam);
else if (cam->module_param.force_munmap)
zc0301_requeue_outqueue(cam);
cam->stream = stream;
return 0;
}
static int
zc0301_vidioc_enum_framesizes(struct zc0301_device* cam, void __user * arg)
{
struct v4l2_frmsizeenum frmsize;
if (copy_from_user(&frmsize, arg, sizeof(frmsize)))
return -EFAULT;
if (frmsize.index != 0 && frmsize.index != 1)
return -EINVAL;
if (frmsize.pixel_format != V4L2_PIX_FMT_JPEG)
return -EINVAL;
frmsize.type = V4L2_FRMSIZE_TYPE_DISCRETE;
if (frmsize.index == 1) {
frmsize.discrete.width = cam->sensor.cropcap.defrect.width;
frmsize.discrete.height = cam->sensor.cropcap.defrect.height;
}
memset(&frmsize.reserved, 0, sizeof(frmsize.reserved));
if (copy_to_user(arg, &frmsize, sizeof(frmsize)))
return -EFAULT;
return 0;
}
static int
zc0301_vidioc_enum_fmt(struct zc0301_device* cam, void __user * arg)
{
struct v4l2_fmtdesc fmtd;
if (copy_from_user(&fmtd, arg, sizeof(fmtd)))
return -EFAULT;
if (fmtd.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
return -EINVAL;
if (fmtd.index == 0) {
strcpy(fmtd.description, "JPEG");
fmtd.pixelformat = V4L2_PIX_FMT_JPEG;
fmtd.flags = V4L2_FMT_FLAG_COMPRESSED;
} else
return -EINVAL;
fmtd.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
memset(&fmtd.reserved, 0, sizeof(fmtd.reserved));
if (copy_to_user(arg, &fmtd, sizeof(fmtd)))
return -EFAULT;
return 0;
}
static int
zc0301_vidioc_g_fmt(struct zc0301_device* cam, void __user * arg)
{
struct v4l2_format format;
struct v4l2_pix_format* pfmt = &(cam->sensor.pix_format);
if (copy_from_user(&format, arg, sizeof(format)))
return -EFAULT;
if (format.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
return -EINVAL;
pfmt->bytesperline = 0;
pfmt->sizeimage = pfmt->height * ((pfmt->width*pfmt->priv)/8);
pfmt->field = V4L2_FIELD_NONE;
memcpy(&(format.fmt.pix), pfmt, sizeof(*pfmt));
if (copy_to_user(arg, &format, sizeof(format)))
return -EFAULT;
return 0;
}
static int
zc0301_vidioc_try_s_fmt(struct zc0301_device* cam, unsigned int cmd,
void __user * arg)
{
struct zc0301_sensor* s = &cam->sensor;
struct v4l2_format format;
struct v4l2_pix_format* pix;
struct v4l2_pix_format* pfmt = &(s->pix_format);
struct v4l2_rect* bounds = &(s->cropcap.bounds);
struct v4l2_rect rect;
const enum zc0301_stream_state stream = cam->stream;
const u32 nbuffers = cam->nbuffers;
u32 i;
int err = 0;
if (copy_from_user(&format, arg, sizeof(format)))
return -EFAULT;
pix = &(format.fmt.pix);
if (format.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
return -EINVAL;
memcpy(&rect, &(s->_rect), sizeof(rect));
if (!s->set_crop) {
pix->width = rect.width;
pix->height = rect.height;
} else {
rect.width = pix->width;
rect.height = pix->height;
}
if (rect.width < 8)
rect.width = 8;
if (rect.height < 8)
rect.height = 8;
if (rect.width > bounds->left + bounds->width - rect.left)
rect.width = bounds->left + bounds->width - rect.left;
if (rect.height > bounds->top + bounds->height - rect.top)
rect.height = bounds->top + bounds->height - rect.top;
rect.width &= ~7L;
rect.height &= ~7L;
pix->width = rect.width;
pix->height = rect.height;
pix->pixelformat = pfmt->pixelformat;
pix->priv = pfmt->priv;
pix->colorspace = pfmt->colorspace;
pix->bytesperline = 0;
pix->sizeimage = pix->height * ((pix->width * pix->priv) / 8);
pix->field = V4L2_FIELD_NONE;
if (cmd == VIDIOC_TRY_FMT) {
if (copy_to_user(arg, &format, sizeof(format)))
return -EFAULT;
return 0;
}
if (cam->module_param.force_munmap)
for (i = 0; i < cam->nbuffers; i++)
if (cam->frame[i].vma_use_count) {
DBG(3, "VIDIOC_S_FMT failed. "
"Unmap the buffers first.");
return -EBUSY;
}
if (cam->stream == STREAM_ON)
if ((err = zc0301_stream_interrupt(cam)))
return err;
if (copy_to_user(arg, &format, sizeof(format))) {
cam->stream = stream;
return -EFAULT;
}
if (cam->module_param.force_munmap || cam->io == IO_READ)
zc0301_release_buffers(cam);
if (s->set_crop)
err += s->set_crop(cam, &rect);
if (err) { /* atomic, no rollback in ioctl() */
cam->state |= DEV_MISCONFIGURED;
DBG(1, "VIDIOC_S_FMT failed because of hardware problems. To "
"use the camera, close and open /dev/video%d again.",
cam->v4ldev->minor);
return -EIO;
}
memcpy(pfmt, pix, sizeof(*pix));
memcpy(&(s->_rect), &rect, sizeof(rect));
if ((cam->module_param.force_munmap || cam->io == IO_READ) &&
nbuffers != zc0301_request_buffers(cam, nbuffers, cam->io)) {
cam->state |= DEV_MISCONFIGURED;
DBG(1, "VIDIOC_S_FMT failed because of not enough memory. To "
"use the camera, close and open /dev/video%d again.",
cam->v4ldev->minor);
return -ENOMEM;
}
if (cam->io == IO_READ)
zc0301_empty_framequeues(cam);
else if (cam->module_param.force_munmap)
zc0301_requeue_outqueue(cam);
cam->stream = stream;
return 0;
}
static int
zc0301_vidioc_g_jpegcomp(struct zc0301_device* cam, void __user * arg)
{
if (copy_to_user(arg, &cam->compression, sizeof(cam->compression)))
return -EFAULT;
return 0;
}
static int
zc0301_vidioc_s_jpegcomp(struct zc0301_device* cam, void __user * arg)
{
struct v4l2_jpegcompression jc;
const enum zc0301_stream_state stream = cam->stream;
int err = 0;
if (copy_from_user(&jc, arg, sizeof(jc)))
return -EFAULT;
if (jc.quality != 0)
return -EINVAL;
if (cam->stream == STREAM_ON)
if ((err = zc0301_stream_interrupt(cam)))
return err;
err += zc0301_set_compression(cam, &jc);
if (err) { /* atomic, no rollback in ioctl() */
cam->state |= DEV_MISCONFIGURED;
DBG(1, "VIDIOC_S_JPEGCOMP failed because of hardware "
"problems. To use the camera, close and open "
"/dev/video%d again.", cam->v4ldev->minor);
return -EIO;
}
cam->compression.quality = jc.quality;
cam->stream = stream;
return 0;
}
static int
zc0301_vidioc_reqbufs(struct zc0301_device* cam, void __user * arg)
{
struct v4l2_requestbuffers rb;
u32 i;
int err;
if (copy_from_user(&rb, arg, sizeof(rb)))
return -EFAULT;
if (rb.type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
rb.memory != V4L2_MEMORY_MMAP)
return -EINVAL;
if (cam->io == IO_READ) {
DBG(3, "Close and open the device again to choose the mmap "
"I/O method");
return -EBUSY;
}
for (i = 0; i < cam->nbuffers; i++)
if (cam->frame[i].vma_use_count) {
DBG(3, "VIDIOC_REQBUFS failed. "
"Previous buffers are still mapped.");
return -EBUSY;
}
if (cam->stream == STREAM_ON)
if ((err = zc0301_stream_interrupt(cam)))
return err;
zc0301_empty_framequeues(cam);
zc0301_release_buffers(cam);
if (rb.count)
rb.count = zc0301_request_buffers(cam, rb.count, IO_MMAP);
if (copy_to_user(arg, &rb, sizeof(rb))) {
zc0301_release_buffers(cam);
cam->io = IO_NONE;
return -EFAULT;
}
cam->io = rb.count ? IO_MMAP : IO_NONE;
return 0;
}
static int
zc0301_vidioc_querybuf(struct zc0301_device* cam, void __user * arg)
{
struct v4l2_buffer b;
if (copy_from_user(&b, arg, sizeof(b)))
return -EFAULT;
if (b.type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
b.index >= cam->nbuffers || cam->io != IO_MMAP)
return -EINVAL;
memcpy(&b, &cam->frame[b.index].buf, sizeof(b));
if (cam->frame[b.index].vma_use_count)
b.flags |= V4L2_BUF_FLAG_MAPPED;
if (cam->frame[b.index].state == F_DONE)
b.flags |= V4L2_BUF_FLAG_DONE;
else if (cam->frame[b.index].state != F_UNUSED)
b.flags |= V4L2_BUF_FLAG_QUEUED;
if (copy_to_user(arg, &b, sizeof(b)))
return -EFAULT;
return 0;
}
static int
zc0301_vidioc_qbuf(struct zc0301_device* cam, void __user * arg)
{
struct v4l2_buffer b;
unsigned long lock_flags;
if (copy_from_user(&b, arg, sizeof(b)))
return -EFAULT;
if (b.type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
b.index >= cam->nbuffers || cam->io != IO_MMAP)
return -EINVAL;
if (cam->frame[b.index].state != F_UNUSED)
return -EINVAL;
cam->frame[b.index].state = F_QUEUED;
spin_lock_irqsave(&cam->queue_lock, lock_flags);
list_add_tail(&cam->frame[b.index].frame, &cam->inqueue);
spin_unlock_irqrestore(&cam->queue_lock, lock_flags);
PDBGG("Frame #%lu queued", (unsigned long)b.index);
return 0;
}
static int
zc0301_vidioc_dqbuf(struct zc0301_device* cam, struct file* filp,
void __user * arg)
{
struct v4l2_buffer b;
struct zc0301_frame_t *f;
unsigned long lock_flags;
long timeout;
if (copy_from_user(&b, arg, sizeof(b)))
return -EFAULT;
if (b.type != V4L2_BUF_TYPE_VIDEO_CAPTURE || cam->io!= IO_MMAP)
return -EINVAL;
if (list_empty(&cam->outqueue)) {
if (cam->stream == STREAM_OFF)
return -EINVAL;
if (filp->f_flags & O_NONBLOCK)
return -EAGAIN;
timeout = wait_event_interruptible_timeout
( cam->wait_frame,
(!list_empty(&cam->outqueue)) ||
(cam->state & DEV_DISCONNECTED) ||
(cam->state & DEV_MISCONFIGURED),
cam->module_param.frame_timeout *
1000 * msecs_to_jiffies(1) );
if (timeout < 0)
return timeout;
if (cam->state & DEV_DISCONNECTED)
return -ENODEV;
if (!timeout || (cam->state & DEV_MISCONFIGURED))
return -EIO;
}
spin_lock_irqsave(&cam->queue_lock, lock_flags);
f = list_entry(cam->outqueue.next, struct zc0301_frame_t, frame);
list_del(cam->outqueue.next);
spin_unlock_irqrestore(&cam->queue_lock, lock_flags);
f->state = F_UNUSED;
memcpy(&b, &f->buf, sizeof(b));
if (f->vma_use_count)
b.flags |= V4L2_BUF_FLAG_MAPPED;
if (copy_to_user(arg, &b, sizeof(b)))
return -EFAULT;
PDBGG("Frame #%lu dequeued", (unsigned long)f->buf.index);
return 0;
}
static int
zc0301_vidioc_streamon(struct zc0301_device* cam, void __user * arg)
{
int type;
if (copy_from_user(&type, arg, sizeof(type)))
return -EFAULT;
if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE || cam->io != IO_MMAP)
return -EINVAL;
cam->stream = STREAM_ON;
DBG(3, "Stream on");
return 0;
}
static int
zc0301_vidioc_streamoff(struct zc0301_device* cam, void __user * arg)
{
int type, err;
if (copy_from_user(&type, arg, sizeof(type)))
return -EFAULT;
if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE || cam->io != IO_MMAP)
return -EINVAL;
if (cam->stream == STREAM_ON)
if ((err = zc0301_stream_interrupt(cam)))
return err;
zc0301_empty_framequeues(cam);
DBG(3, "Stream off");
return 0;
}
static int
zc0301_vidioc_g_parm(struct zc0301_device* cam, void __user * arg)
{
struct v4l2_streamparm sp;
if (copy_from_user(&sp, arg, sizeof(sp)))
return -EFAULT;
if (sp.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
return -EINVAL;
sp.parm.capture.extendedmode = 0;
sp.parm.capture.readbuffers = cam->nreadbuffers;
if (copy_to_user(arg, &sp, sizeof(sp)))
return -EFAULT;
return 0;
}
static int
zc0301_vidioc_s_parm(struct zc0301_device* cam, void __user * arg)
{
struct v4l2_streamparm sp;
if (copy_from_user(&sp, arg, sizeof(sp)))
return -EFAULT;
if (sp.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
return -EINVAL;
sp.parm.capture.extendedmode = 0;
if (sp.parm.capture.readbuffers == 0)
sp.parm.capture.readbuffers = cam->nreadbuffers;
if (sp.parm.capture.readbuffers > ZC0301_MAX_FRAMES)
sp.parm.capture.readbuffers = ZC0301_MAX_FRAMES;
if (copy_to_user(arg, &sp, sizeof(sp)))
return -EFAULT;
cam->nreadbuffers = sp.parm.capture.readbuffers;
return 0;
}
static int zc0301_ioctl_v4l2(struct inode* inode, struct file* filp,
unsigned int cmd, void __user * arg)
{
struct zc0301_device* cam = video_get_drvdata(video_devdata(filp));
switch (cmd) {
case VIDIOC_QUERYCAP:
return zc0301_vidioc_querycap(cam, arg);
case VIDIOC_ENUMINPUT:
return zc0301_vidioc_enuminput(cam, arg);
case VIDIOC_G_INPUT:
return zc0301_vidioc_g_input(cam, arg);
case VIDIOC_S_INPUT:
return zc0301_vidioc_s_input(cam, arg);
case VIDIOC_QUERYCTRL:
return zc0301_vidioc_query_ctrl(cam, arg);
case VIDIOC_G_CTRL:
return zc0301_vidioc_g_ctrl(cam, arg);
case VIDIOC_S_CTRL:
return zc0301_vidioc_s_ctrl(cam, arg);
case VIDIOC_CROPCAP:
return zc0301_vidioc_cropcap(cam, arg);
case VIDIOC_G_CROP:
return zc0301_vidioc_g_crop(cam, arg);
case VIDIOC_S_CROP:
return zc0301_vidioc_s_crop(cam, arg);
case VIDIOC_ENUM_FMT:
return zc0301_vidioc_enum_fmt(cam, arg);
case VIDIOC_G_FMT:
return zc0301_vidioc_g_fmt(cam, arg);
case VIDIOC_TRY_FMT:
case VIDIOC_S_FMT:
return zc0301_vidioc_try_s_fmt(cam, cmd, arg);
case VIDIOC_ENUM_FRAMESIZES:
return zc0301_vidioc_enum_framesizes(cam, arg);
case VIDIOC_G_JPEGCOMP:
return zc0301_vidioc_g_jpegcomp(cam, arg);
case VIDIOC_S_JPEGCOMP:
return zc0301_vidioc_s_jpegcomp(cam, arg);
case VIDIOC_REQBUFS:
return zc0301_vidioc_reqbufs(cam, arg);
case VIDIOC_QUERYBUF:
return zc0301_vidioc_querybuf(cam, arg);
case VIDIOC_QBUF:
return zc0301_vidioc_qbuf(cam, arg);
case VIDIOC_DQBUF:
return zc0301_vidioc_dqbuf(cam, filp, arg);
case VIDIOC_STREAMON:
return zc0301_vidioc_streamon(cam, arg);
case VIDIOC_STREAMOFF:
return zc0301_vidioc_streamoff(cam, arg);
case VIDIOC_G_PARM:
return zc0301_vidioc_g_parm(cam, arg);
case VIDIOC_S_PARM:
return zc0301_vidioc_s_parm(cam, arg);
case VIDIOC_G_STD:
case VIDIOC_S_STD:
case VIDIOC_QUERYSTD:
case VIDIOC_ENUMSTD:
case VIDIOC_QUERYMENU:
case VIDIOC_ENUM_FRAMEINTERVALS:
return -EINVAL;
default:
return -EINVAL;
}
}
static int zc0301_ioctl(struct inode* inode, struct file* filp,
unsigned int cmd, unsigned long arg)
{
struct zc0301_device* cam = video_get_drvdata(video_devdata(filp));
int err = 0;
if (mutex_lock_interruptible(&cam->fileop_mutex))
return -ERESTARTSYS;
if (cam->state & DEV_DISCONNECTED) {
DBG(1, "Device not present");
mutex_unlock(&cam->fileop_mutex);
return -ENODEV;
}
if (cam->state & DEV_MISCONFIGURED) {
DBG(1, "The camera is misconfigured. Close and open it "
"again.");
mutex_unlock(&cam->fileop_mutex);
return -EIO;
}
V4LDBG(3, "zc0301", cmd);
err = zc0301_ioctl_v4l2(inode, filp, cmd, (void __user *)arg);
mutex_unlock(&cam->fileop_mutex);
return err;
}
static const struct file_operations zc0301_fops = {
.owner = THIS_MODULE,
.open = zc0301_open,
.release = zc0301_release,
.ioctl = zc0301_ioctl,
.compat_ioctl = v4l_compat_ioctl32,
.read = zc0301_read,
.poll = zc0301_poll,
.mmap = zc0301_mmap,
.llseek = no_llseek,
};
/*****************************************************************************/
static int
zc0301_usb_probe(struct usb_interface* intf, const struct usb_device_id* id)
{
struct usb_device *udev = interface_to_usbdev(intf);
struct zc0301_device* cam;
static unsigned int dev_nr = 0;
unsigned int i;
int err = 0;
if (!(cam = kzalloc(sizeof(struct zc0301_device), GFP_KERNEL)))
return -ENOMEM;
cam->usbdev = udev;
if (!(cam->control_buffer = kzalloc(4, GFP_KERNEL))) {
DBG(1, "kmalloc() failed");
err = -ENOMEM;
goto fail;
}
if (!(cam->v4ldev = video_device_alloc())) {
DBG(1, "video_device_alloc() failed");
err = -ENOMEM;
goto fail;
}
DBG(2, "ZC0301[P] Image Processor and Control Chip detected "
"(vid/pid 0x%04X:0x%04X)",id->idVendor, id->idProduct);
for (i = 0; zc0301_sensor_table[i]; i++) {
err = zc0301_sensor_table[i](cam);
if (!err)
break;
}
if (!err)
DBG(2, "%s image sensor detected", cam->sensor.name);
else {
DBG(1, "No supported image sensor detected");
err = -ENODEV;
goto fail;
}
if (zc0301_init(cam)) {
DBG(1, "Initialization failed. I will retry on open().");
cam->state |= DEV_MISCONFIGURED;
}
strcpy(cam->v4ldev->name, "ZC0301[P] PC Camera");
cam->v4ldev->owner = THIS_MODULE;
cam->v4ldev->type = VID_TYPE_CAPTURE | VID_TYPE_SCALES;
cam->v4ldev->fops = &zc0301_fops;
cam->v4ldev->minor = video_nr[dev_nr];
cam->v4ldev->release = video_device_release;
video_set_drvdata(cam->v4ldev, cam);
init_completion(&cam->probe);
err = video_register_device(cam->v4ldev, VFL_TYPE_GRABBER,
video_nr[dev_nr]);
if (err) {
DBG(1, "V4L2 device registration failed");
if (err == -ENFILE && video_nr[dev_nr] == -1)
DBG(1, "Free /dev/videoX node not found");
video_nr[dev_nr] = -1;
dev_nr = (dev_nr < ZC0301_MAX_DEVICES-1) ? dev_nr+1 : 0;
complete_all(&cam->probe);
goto fail;
}
DBG(2, "V4L2 device registered as /dev/video%d", cam->v4ldev->minor);
cam->module_param.force_munmap = force_munmap[dev_nr];
cam->module_param.frame_timeout = frame_timeout[dev_nr];
dev_nr = (dev_nr < ZC0301_MAX_DEVICES-1) ? dev_nr+1 : 0;
usb_set_intfdata(intf, cam);
kref_init(&cam->kref);
usb_get_dev(cam->usbdev);
complete_all(&cam->probe);
return 0;
fail:
if (cam) {
kfree(cam->control_buffer);
if (cam->v4ldev)
video_device_release(cam->v4ldev);
kfree(cam);
}
return err;
}
static void zc0301_usb_disconnect(struct usb_interface* intf)
{
struct zc0301_device* cam;
down_write(&zc0301_dev_lock);
cam = usb_get_intfdata(intf);
DBG(2, "Disconnecting %s...", cam->v4ldev->name);
if (cam->users) {
DBG(2, "Device /dev/video%d is open! Deregistration and "
"memory deallocation are deferred.",
cam->v4ldev->minor);
cam->state |= DEV_MISCONFIGURED;
zc0301_stop_transfer(cam);
cam->state |= DEV_DISCONNECTED;
wake_up_interruptible(&cam->wait_frame);
wake_up(&cam->wait_stream);
} else
cam->state |= DEV_DISCONNECTED;
wake_up_interruptible_all(&cam->wait_open);
kref_put(&cam->kref, zc0301_release_resources);
up_write(&zc0301_dev_lock);
}
static struct usb_driver zc0301_usb_driver = {
.name = "zc0301",
.id_table = zc0301_id_table,
.probe = zc0301_usb_probe,
.disconnect = zc0301_usb_disconnect,
};
/*****************************************************************************/
static int __init zc0301_module_init(void)
{
int err = 0;
KDBG(2, ZC0301_MODULE_NAME " v" ZC0301_MODULE_VERSION);
KDBG(3, ZC0301_MODULE_AUTHOR);
if ((err = usb_register(&zc0301_usb_driver)))
KDBG(1, "usb_register() failed");
return err;
}
static void __exit zc0301_module_exit(void)
{
usb_deregister(&zc0301_usb_driver);
}
module_init(zc0301_module_init);
module_exit(zc0301_module_exit);
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