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Commit 60f78052 authored by Luca Risolia's avatar Luca Risolia Committed by Greg Kroah-Hartman
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[PATCH] USB: Add ZC0301 Video4Linux2 driver 

This patch adds a Video4Linux2 driver for ZC0301
Image Processor and Control Chip.
Signed-off-by: default avatarLuca Risolia <luca.risolia@studio.unibo.it>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent c4a1745a
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Documentation/usb/zc0301.txt 0 → 100644
View file @ 60f78052
ZC0301 Image Processor and Control Chip
Driver for Linux
=======================================
- Documentation -
Index
=====
1. Copyright
2. Disclaimer
3. License
4. Overview and features
5. Module dependencies
6. Module loading
7. Module parameters
8. Supported devices
9. Notes for V4L2 application developers
10. Contact information
11. Credits
1. Copyright
============
Copyright (C) 2006 by Luca Risolia <luca.risolia@studio.unibo.it>
2. Disclaimer
=============
This software is not developed or sponsored by Z-Star Microelectronics Corp.
Trademarks are property of their respective owner.
3. License
==========
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.
4. Overview and features
========================
This driver supports the video interface of the devices mounting the ZC0301
Image Processor and Control Chip.
The driver relies on the Video4Linux2 and USB core modules. It has been
designed to run properly on SMP systems as well.
The latest version of the ZC0301 driver can be found at the following URL:
http://www.linux-projects.org/
Some of the features of the driver are:
- full compliance with the Video4Linux2 API (see also "Notes for V4L2
application developers" paragraph);
- available mmap or read/poll methods for video streaming through isochronous
data transfers;
- automatic detection of image sensor;
- video formats is standard JPEG in various compression qualities
(see also "Notes for V4L2 application developers" paragraph);
- full support for the capabilities of every possible image sensors that can
be connected to the ZC0301 bridges, including, for istance, red, green,
blue and global gain adjustments and exposure control (see "Supported
devices" paragraph for details);
- use of default color settings for sunlight conditions;
- dynamic driver control thanks to various module parameters (see "Module
parameters" paragraph);
- up to 64 cameras can be handled at the same time; they can be connected and
disconnected from the host many times without turning off the computer, if
the system supports hotplugging;
5. Module dependencies
======================
For it to work properly, the driver needs kernel support for Video4Linux and
USB.
The following options of the kernel configuration file must be enabled and
corresponding modules must be compiled:
# Multimedia devices
#
CONFIG_VIDEO_DEV=m
# USB support
#
CONFIG_USB=m
In addition, depending on the hardware being used, the modules below are
necessary:
# USB Host Controller Drivers
#
CONFIG_USB_EHCI_HCD=m
CONFIG_USB_UHCI_HCD=m
CONFIG_USB_OHCI_HCD=m
The ZC0301 controller also provides a built-in microphone interface. It is
supported by the USB Audio driver thanks to the ALSA API:
# Sound
#
CONFIG_SOUND=y
# Advanced Linux Sound Architecture
#
CONFIG_SND=m
# USB devices
#
CONFIG_SND_USB_AUDIO=m
And finally:
# USB Multimedia devices
#
CONFIG_USB_ZC0301=m
6. Module loading
=================
To use the driver, it is necessary to load the "zc0301" module into memory
after every other module required: "videodev", "usbcore" and, depending on
the USB host controller you have, "ehci-hcd", "uhci-hcd" or "ohci-hcd".
Loading can be done as shown below:
[root@localhost home]# modprobe zc0301
At this point the devices should be recognized. You can invoke "dmesg" to
analyze kernel messages and verify that the loading process has gone well:
[user@localhost home]$ dmesg
7. Module parameters
====================
Module parameters are listed below:
-------------------------------------------------------------------------------
Name: video_nr
Type: short array (min = 0, max = 64)
Syntax: <-1|n[,...]>
Description: Specify V4L2 minor mode number:
-1 = use next available
n = use minor number n
You can specify up to 64 cameras this way.
For example:
video_nr=-1,2,-1 would assign minor number 2 to the second
registered camera and use auto for the first one and for every
other camera.
Default: -1
-------------------------------------------------------------------------------
Name: force_munmap
Type: bool array (min = 0, max = 64)
Syntax: <0|1[,...]>
Description: Force the application to unmap previously mapped buffer memory
before calling any VIDIOC_S_CROP or VIDIOC_S_FMT ioctl's. Not
all the applications support this feature. This parameter is
specific for each detected camera.
0 = do not force memory unmapping
1 = force memory unmapping (save memory)
Default: 0
-------------------------------------------------------------------------------
Name: debug
Type: ushort
Syntax: <n>
Description: Debugging information level, from 0 to 3:
0 = none (use carefully)
1 = critical errors
2 = significant informations
3 = more verbose messages
Level 3 is useful for testing only, when only one device
is used at the same time. It also shows some more informations
about the hardware being detected. This module parameter can be
changed at runtime thanks to the /sys filesystem interface.
Default: 2
-------------------------------------------------------------------------------
8. Supported devices
====================
None of the names of the companies as well as their products will be mentioned
here. They have never collaborated with the author, so no advertising.
From the point of view of a driver, what unambiguously identify a device are
its vendor and product USB identifiers. Below is a list of known identifiers of
devices mounting the ZC0301 Image Processor and Control Chips:
Vendor ID Product ID
--------- ----------
0x046d 0x08ae
The following image sensors are supported:
Model Manufacturer
----- ------------
PAS202BCB PixArt Imaging, Inc.
All the available control settings of each image sensor are supported through
the V4L2 interface.
9. Notes for V4L2 application developers
========================================
This driver follows the V4L2 API specifications. In particular, it enforces two
rules:
- exactly one I/O method, either "mmap" or "read", is associated with each
file descriptor. Once it is selected, the application must close and reopen the
device to switch to the other I/O method;
- although it is not mandatory, previously mapped buffer memory should always
be unmapped before calling any "VIDIOC_S_CROP" or "VIDIOC_S_FMT" ioctl's.
The same number of buffers as before will be allocated again to match the size
of the new video frames, so you have to map the buffers again before any I/O
attempts on them.
This driver supports the standard JPEG video format. The current compression
quality may vary from 0 to 3 and can be selected or queried thanks to the
VIDIOC_S_JPEGCOMP and VIDIOC_G_JPEGCOMP V4L2 ioctl's.
10. Contact information
=======================
The author may be contacted by e-mail at <luca.risolia@studio.unibo.it>.
GPG/PGP encrypted e-mail's are accepted. The GPG key ID of the author is
'FCE635A4'; the public 1024-bit key should be available at any keyserver;
the fingerprint is: '88E8 F32F 7244 68BA 3958 5D40 99DA 5D2A FCE6 35A4'.
11. Credits
===========
- Informations about the chip internals to enable the I2C protocol have been
taken from the documentation of the ZC030x Video4Linux1 driver written by
Andrew Birkett <andy@nobugs.org>;
- Initialization values of the ZC0301 connected to the PAS202BCB image sensor
have been taken from the SPCA5XX driver maintained by
Michel Xhaard <mxhaard@magic.fr>
MAINTAINERS
View file @ 60f78052
......@@ -2902,6 +2902,14 @@ L: video4linux-list@redhat.com
W: http://www.linux-projects.org
S: Maintained
USB ZC0301 DRIVER
P: Luca Risolia
M: luca.risolia@studio.unibo.it
L: linux-usb-devel@lists.sourceforge.net
L: video4linux-list@redhat.com
W: http://www.linux-projects.org
S: Maintained
USB ZD1201 DRIVER
P: Jeroen Vreeken
M: pe1rxq@amsat.org
......
drivers/usb/Makefile
View file @ 60f78052
......@@ -48,6 +48,7 @@ obj-$(CONFIG_USB_SN9C102) += media/
obj-$(CONFIG_USB_STV680) += media/
obj-$(CONFIG_USB_VICAM) += media/
obj-$(CONFIG_USB_W9968CF) += media/
obj-$(CONFIG_USB_ZC0301) += media/
obj-$(CONFIG_USB_CATC) += net/
obj-$(CONFIG_USB_KAWETH) += net/
......
drivers/usb/media/Kconfig
View file @ 60f78052
......@@ -191,6 +191,21 @@ config USB_W9968CF
To compile this driver as a module, choose M here: the
module will be called w9968cf.
config USB_ZC0301
tristate "USB ZC0301 Image Processor and Control Chip support"
depends on USB && VIDEO_DEV
---help---
Say Y here if you want support for cameras based on the ZC0301
Image Processor and Control Chip.
See <file:Documentation/usb/zc0301.txt> for more informations.
This driver uses the Video For Linux API. You must say Y or M to
"Video For Linux" to use this driver.
To compile this driver as a module, choose M here: the
module will be called zc0301.
config USB_PWC
tristate "USB Philips Cameras"
depends on USB && VIDEO_DEV
......
drivers/usb/media/Makefile
View file @ 60f78052
......@@ -4,6 +4,7 @@
sn9c102-objs := sn9c102_core.o sn9c102_hv7131d.o sn9c102_mi0343.o sn9c102_ov7630.o sn9c102_pas106b.o sn9c102_pas202bcb.o sn9c102_tas5110c1b.o sn9c102_tas5130d1b.o
et61x251-objs := et61x251_core.o et61x251_tas5130d1b.o
zc0301-objs := zc0301_core.o zc0301_pas202bcb.o
obj-$(CONFIG_USB_DABUSB) += dabusb.o
obj-$(CONFIG_USB_DSBR) += dsbr100.o
......@@ -16,4 +17,5 @@ obj-$(CONFIG_USB_SN9C102) += sn9c102.o
obj-$(CONFIG_USB_STV680) += stv680.o
obj-$(CONFIG_USB_VICAM) += vicam.o usbvideo.o
obj-$(CONFIG_USB_W9968CF) += w9968cf.o
obj-$(CONFIG_USB_ZC0301) += zc0301.o
obj-$(CONFIG_USB_PWC) += pwc/
drivers/usb/media/zc0301.h 0 → 100644
View file @ 60f78052
/***************************************************************************
* V4L2 driver for ZC0301 Image Processor and Control Chip *
* *
* Copyright (C) 2006 by Luca Risolia <luca.risolia@studio.unibo.it> *
* *
* 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. *
***************************************************************************/
#ifndef _ZC0301_H_
#define _ZC0301_H_
#include <linux/version.h>
#include <linux/usb.h>
#include <linux/videodev2.h>
#include <media/v4l2-common.h>
#include <linux/device.h>
#include <linux/list.h>
#include <linux/spinlock.h>
#include <linux/time.h>
#include <linux/wait.h>
#include <linux/types.h>
#include <linux/param.h>
#include <linux/mutex.h>
#include <linux/rwsem.h>
#include <asm/semaphore.h>
#include "zc0301_sensor.h"
/*****************************************************************************/
#define ZC0301_DEBUG
#define ZC0301_DEBUG_LEVEL 2
#define ZC0301_MAX_DEVICES 64
#define ZC0301_FORCE_MUNMAP 0
#define ZC0301_MAX_FRAMES 32
#define ZC0301_COMPRESSION_QUALITY 2
#define ZC0301_URBS 2
#define ZC0301_ISO_PACKETS 7
#define ZC0301_ALTERNATE_SETTING 7
#define ZC0301_URB_TIMEOUT msecs_to_jiffies(2 * ZC0301_ISO_PACKETS)
#define ZC0301_CTRL_TIMEOUT 100
#define ZC0301_FRAME_TIMEOUT 2 * 1000 * msecs_to_jiffies(1)
/*****************************************************************************/
ZC0301_ID_TABLE
ZC0301_SENSOR_TABLE
enum zc0301_frame_state {
F_UNUSED,
F_QUEUED,
F_GRABBING,
F_DONE,
F_ERROR,
};
struct zc0301_frame_t {
void* bufmem;
struct v4l2_buffer buf;
enum zc0301_frame_state state;
struct list_head frame;
unsigned long vma_use_count;
};
enum zc0301_dev_state {
DEV_INITIALIZED = 0x01,
DEV_DISCONNECTED = 0x02,
DEV_MISCONFIGURED = 0x04,
};
enum zc0301_io_method {
IO_NONE,
IO_READ,
IO_MMAP,
};
enum zc0301_stream_state {
STREAM_OFF,
STREAM_INTERRUPT,
STREAM_ON,
};
struct zc0301_module_param {
u8 force_munmap;
};
static DECLARE_RWSEM(zc0301_disconnect);
struct zc0301_device {
struct video_device* v4ldev;
struct zc0301_sensor* sensor;
struct usb_device* usbdev;
struct urb* urb[ZC0301_URBS];
void* transfer_buffer[ZC0301_URBS];
u8* control_buffer;
struct zc0301_frame_t *frame_current, frame[ZC0301_MAX_FRAMES];
struct list_head inqueue, outqueue;
u32 frame_count, nbuffers, nreadbuffers;
enum zc0301_io_method io;
enum zc0301_stream_state stream;
struct v4l2_jpegcompression compression;
struct zc0301_module_param module_param;
enum zc0301_dev_state state;
u8 users;
struct mutex dev_mutex, fileop_mutex;
spinlock_t queue_lock;
wait_queue_head_t open, wait_frame, wait_stream;
};
/*****************************************************************************/
void
zc0301_attach_sensor(struct zc0301_device* cam, struct zc0301_sensor* sensor)
{
cam->sensor = sensor;
cam->sensor->usbdev = cam->usbdev;
}
/*****************************************************************************/
#undef DBG
#undef KDBG
#ifdef ZC0301_DEBUG
# define DBG(level, fmt, args...) \
do { \
if (debug >= (level)) { \
if ((level) == 1) \
dev_err(&cam->usbdev->dev, fmt "\n", ## args); \
else if ((level) == 2) \
dev_info(&cam->usbdev->dev, fmt "\n", ## args); \
else if ((level) >= 3) \
dev_info(&cam->usbdev->dev, "[%s:%d] " fmt "\n", \
__FUNCTION__, __LINE__ , ## args); \
} \
} while (0)
# define KDBG(level, fmt, args...) \
do { \
if (debug >= (level)) { \
if ((level) == 1 || (level) == 2) \
pr_info("zc0301: " fmt "\n", ## args); \
else if ((level) == 3) \
pr_debug("zc0301: [%s:%d] " fmt "\n", __FUNCTION__, \
__LINE__ , ## args); \
} \
} while (0)
# define V4LDBG(level, name, cmd) \
do { \
if (debug >= (level)) \
v4l_print_ioctl(name, cmd); \
} while (0)
#else
# define DBG(level, fmt, args...) do {;} while(0)
# define KDBG(level, fmt, args...) do {;} while(0)
# define V4LDBG(level, name, cmd) do {;} while(0)
#endif
#undef PDBG
#define PDBG(fmt, args...) \
dev_info(&cam->usbdev->dev, "[%s:%d] " fmt "\n", \
__FUNCTION__, __LINE__ , ## args)
#undef PDBGG
#define PDBGG(fmt, args...) do {;} while(0) /* placeholder */
#endif /* _ZC0301_H_ */
drivers/usb/media/zc0301_core.c 0 → 100644
View file @ 60f78052
/***************************************************************************
* Video4Linux2 driver for ZC0301 Image Processor and Control Chip *
* *
* Copyright (C) 2006 by Luca Risolia <luca.risolia@studio.unibo.it> *
* *
* Informations about the chip internals 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/moduleparam.h>
#include <linux/errno.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/device.h>
#include <linux/fs.h>
#include <linux/delay.h>
#include <linux/stddef.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 " \
"Image Processor and Control Chip"
#define ZC0301_MODULE_AUTHOR "(C) 2006 Luca Risolia"
#define ZC0301_AUTHOR_EMAIL "<luca.risolia@studio.unibo.it>"
#define ZC0301_MODULE_LICENSE "GPL"
#define ZC0301_MODULE_VERSION "1:1.00"
#define ZC0301_MODULE_VERSION_CODE KERNEL_VERSION(1, 0, 0)
/*****************************************************************************/
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(SN9C102_FORCE_MUNMAP)"."
"\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(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 pt_regs* regs)
{
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_interruptible(&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 urb* urb;
const unsigned int wMaxPacketSize[] = {0, 128, 192, 256, 384,
512, 768, 1023};
const unsigned int psz = wMaxPacketSize[ZC0301_ALTERNATE_SETTING];
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 (!timeout) {
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 >> 1));
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)) {
init_waitqueue_head(&cam->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 zc0301_device* cam)
{
DBG(2, "V4L2 device /dev/video%d deregistered", cam->v4ldev->minor);
video_set_drvdata(cam->v4ldev, NULL);
video_unregister_device(cam->v4ldev);
kfree(cam->control_buffer);
}
/*****************************************************************************/
static int zc0301_open(struct inode* inode, struct file* filp)
{
struct zc0301_device* cam;
int err = 0;
/*
This is the only safe way to prevent race conditions with
disconnect
*/
if (!down_read_trylock(&zc0301_disconnect))
return -ERESTARTSYS;
cam = video_get_drvdata(video_devdata(filp));
if (mutex_lock_interruptible(&cam->dev_mutex)) {
up_read(&zc0301_disconnect);
return -ERESTARTSYS;
}
if (cam->users) {
DBG(2, "Device /dev/video%d is busy...", cam->v4ldev->minor);
if ((filp->f_flags & O_NONBLOCK) ||
(filp->f_flags & O_NDELAY)) {
err = -EWOULDBLOCK;
goto out;
}
mutex_unlock(&cam->dev_mutex);
err = wait_event_interruptible_exclusive(cam->open,
cam->state & DEV_DISCONNECTED
|| !cam->users);
if (err) {
up_read(&zc0301_disconnect);
return err;
}
if (cam->state & DEV_DISCONNECTED) {
up_read(&zc0301_disconnect);
return -ENODEV;
}
mutex_lock(&cam->dev_mutex);
}
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->dev_mutex);
up_read(&zc0301_disconnect);
return err;
}
static int zc0301_release(struct inode* inode, struct file* filp)
{
struct zc0301_device* cam = video_get_drvdata(video_devdata(filp));
mutex_lock(&cam->dev_mutex); /* prevent disconnect() to be called */
zc0301_stop_transfer(cam);
zc0301_release_buffers(cam);
if (cam->state & DEV_DISCONNECTED) {
zc0301_release_resources(cam);
mutex_unlock(&cam->dev_mutex);
kfree(cam);
return 0;
}
cam->users--;
wake_up_interruptible_nr(&cam->open, 1);
DBG(3, "Video device /dev/video%d closed", cam->v4ldev->minor);
mutex_unlock(&cam->dev_mutex);
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 -EINVAL;
}
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),
ZC0301_FRAME_TIMEOUT );
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 (cam->io != IO_MMAP || !(vma->vm_flags & VM_WRITE) ||
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");
if (copy_to_user(arg, &i, sizeof(i)))
return -EFAULT;
return 0;
}
static int
zc0301_vidioc_gs_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 (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 -EINVAL;
}
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_fmt(struct zc0301_device* cam, void __user * arg)
{
struct v4l2_fmtdesc fmtd;
if (copy_from_user(&fmtd, arg, sizeof(fmtd)))
return -EFAULT;
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 -EINVAL;
}
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 || jc.quality > 3)
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 -EINVAL;
}
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 -EINVAL;
}
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),
ZC0301_FRAME_TIMEOUT );
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;
if (list_empty(&cam->inqueue))
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:
case VIDIOC_S_INPUT:
return zc0301_vidioc_gs_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_OLD:
case VIDIOC_S_CTRL:
return zc0301_vidioc_s_ctrl(cam, arg);
case VIDIOC_CROPCAP_OLD:
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_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_OLD:
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:
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 struct file_operations zc0301_fops = {
.owner = THIS_MODULE,
.open = zc0301_open,
.release = zc0301_release,
.ioctl = zc0301_ioctl,
.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;
}
mutex_init(&cam->dev_mutex);
DBG(2, "ZC0301 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 && cam->sensor)
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 PC Camera");
cam->v4ldev->owner = THIS_MODULE;
cam->v4ldev->type = VID_TYPE_CAPTURE | VID_TYPE_SCALES;
cam->v4ldev->hardware = 0;
cam->v4ldev->fops = &zc0301_fops;
cam->v4ldev->minor = video_nr[dev_nr];
cam->v4ldev->release = video_device_release;
video_set_drvdata(cam->v4ldev, cam);
mutex_lock(&cam->dev_mutex);
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;
mutex_unlock(&cam->dev_mutex);
goto fail;
}
DBG(2, "V4L2 device registered as /dev/video%d", cam->v4ldev->minor);
cam->module_param.force_munmap = force_munmap[dev_nr];
dev_nr = (dev_nr < ZC0301_MAX_DEVICES-1) ? dev_nr+1 : 0;
usb_set_intfdata(intf, cam);
mutex_unlock(&cam->dev_mutex);
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 = usb_get_intfdata(intf);
if (!cam)
return;
down_write(&zc0301_disconnect);
mutex_lock(&cam->dev_mutex);
DBG(2, "Disconnecting %s...", cam->v4ldev->name);
wake_up_interruptible_all(&cam->open);
if (cam->users) {
DBG(2, "Device /dev/video%d is open! Deregistration and "
"memory deallocation are deferred on close.",
cam->v4ldev->minor);
cam->state |= DEV_MISCONFIGURED;
zc0301_stop_transfer(cam);
cam->state |= DEV_DISCONNECTED;
wake_up_interruptible(&cam->wait_frame);
wake_up_interruptible(&cam->wait_stream);
} else {
cam->state |= DEV_DISCONNECTED;
zc0301_release_resources(cam);
}
mutex_unlock(&cam->dev_mutex);
if (!cam->users)
kfree(cam);
up_write(&zc0301_disconnect);
}
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);
drivers/usb/media/zc0301_pas202bcb.c 0 → 100644
View file @ 60f78052
/***************************************************************************
* Plug-in for PAS202BCB image sensor connected to the ZC030! Image *
* Processor and Control Chip *
* *
* Copyright (C) 2006 by Luca Risolia <luca.risolia@studio.unibo.it> *
* *
* Initialization values of the ZC0301 have been taken from the SPCA5XX *
* driver maintained by Michel Xhaard <mxhaard@magic.fr> *
* *
* 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/delay.h>
#include "zc0301_sensor.h"
static struct zc0301_sensor pas202bcb;
static int pas202bcb_init(struct zc0301_device* cam)
{
int err = 0;
err += zc0301_write_reg(cam, 0x0002, 0x00);
err += zc0301_write_reg(cam, 0x0003, 0x02);
err += zc0301_write_reg(cam, 0x0004, 0x80);
err += zc0301_write_reg(cam, 0x0005, 0x01);
err += zc0301_write_reg(cam, 0x0006, 0xE0);
err += zc0301_write_reg(cam, 0x0098, 0x00);
err += zc0301_write_reg(cam, 0x009A, 0x03);
err += zc0301_write_reg(cam, 0x011A, 0x00);
err += zc0301_write_reg(cam, 0x011C, 0x03);
err += zc0301_write_reg(cam, 0x009B, 0x01);
err += zc0301_write_reg(cam, 0x009C, 0xE6);
err += zc0301_write_reg(cam, 0x009D, 0x02);
err += zc0301_write_reg(cam, 0x009E, 0x86);
err += zc0301_i2c_write(cam, 0x02, 0x02);
err += zc0301_i2c_write(cam, 0x0A, 0x01);
err += zc0301_i2c_write(cam, 0x0B, 0x01);
err += zc0301_i2c_write(cam, 0x0D, 0x00);
err += zc0301_i2c_write(cam, 0x12, 0x05);
err += zc0301_i2c_write(cam, 0x13, 0x63);
err += zc0301_i2c_write(cam, 0x15, 0x70);
err += zc0301_write_reg(cam, 0x0101, 0xB7);
err += zc0301_write_reg(cam, 0x0100, 0x0D);
err += zc0301_write_reg(cam, 0x0189, 0x06);
err += zc0301_write_reg(cam, 0x01AD, 0x00);
err += zc0301_write_reg(cam, 0x01C5, 0x03);
err += zc0301_write_reg(cam, 0x01CB, 0x13);
err += zc0301_write_reg(cam, 0x0250, 0x08);
err += zc0301_write_reg(cam, 0x0301, 0x08);
err += zc0301_write_reg(cam, 0x018D, 0x70);
err += zc0301_write_reg(cam, 0x0008, 0x03);
err += zc0301_write_reg(cam, 0x01C6, 0x04);
err += zc0301_write_reg(cam, 0x01CB, 0x07);
err += zc0301_write_reg(cam, 0x0120, 0x11);
err += zc0301_write_reg(cam, 0x0121, 0x37);
err += zc0301_write_reg(cam, 0x0122, 0x58);
err += zc0301_write_reg(cam, 0x0123, 0x79);
err += zc0301_write_reg(cam, 0x0124, 0x91);
err += zc0301_write_reg(cam, 0x0125, 0xA6);
err += zc0301_write_reg(cam, 0x0126, 0xB8);
err += zc0301_write_reg(cam, 0x0127, 0xC7);
err += zc0301_write_reg(cam, 0x0128, 0xD3);
err += zc0301_write_reg(cam, 0x0129, 0xDE);
err += zc0301_write_reg(cam, 0x012A, 0xE6);
err += zc0301_write_reg(cam, 0x012B, 0xED);
err += zc0301_write_reg(cam, 0x012C, 0xF3);
err += zc0301_write_reg(cam, 0x012D, 0xF8);
err += zc0301_write_reg(cam, 0x012E, 0xFB);
err += zc0301_write_reg(cam, 0x012F, 0xFF);
err += zc0301_write_reg(cam, 0x0130, 0x26);
err += zc0301_write_reg(cam, 0x0131, 0x23);
err += zc0301_write_reg(cam, 0x0132, 0x20);
err += zc0301_write_reg(cam, 0x0133, 0x1C);
err += zc0301_write_reg(cam, 0x0134, 0x16);
err += zc0301_write_reg(cam, 0x0135, 0x13);
err += zc0301_write_reg(cam, 0x0136, 0x10);
err += zc0301_write_reg(cam, 0x0137, 0x0D);
err += zc0301_write_reg(cam, 0x0138, 0x0B);
err += zc0301_write_reg(cam, 0x0139, 0x09);
err += zc0301_write_reg(cam, 0x013A, 0x07);
err += zc0301_write_reg(cam, 0x013B, 0x06);
err += zc0301_write_reg(cam, 0x013C, 0x05);
err += zc0301_write_reg(cam, 0x013D, 0x04);
err += zc0301_write_reg(cam, 0x013E, 0x03);
err += zc0301_write_reg(cam, 0x013F, 0x02);
err += zc0301_write_reg(cam, 0x010A, 0x4C);
err += zc0301_write_reg(cam, 0x010B, 0xF5);
err += zc0301_write_reg(cam, 0x010C, 0xFF);
err += zc0301_write_reg(cam, 0x010D, 0xF9);
err += zc0301_write_reg(cam, 0x010E, 0x51);
err += zc0301_write_reg(cam, 0x010F, 0xF5);
err += zc0301_write_reg(cam, 0x0110, 0xFB);
err += zc0301_write_reg(cam, 0x0111, 0xED);
err += zc0301_write_reg(cam, 0x0112, 0x5F);
err += zc0301_write_reg(cam, 0x0180, 0x00);
err += zc0301_write_reg(cam, 0x0019, 0x00);
err += zc0301_write_reg(cam, 0x0087, 0x20);
err += zc0301_write_reg(cam, 0x0088, 0x21);
err += zc0301_i2c_write(cam, 0x20, 0x02);
err += zc0301_i2c_write(cam, 0x21, 0x1B);
err += zc0301_i2c_write(cam, 0x03, 0x44);
err += zc0301_i2c_write(cam, 0x0E, 0x01);
err += zc0301_i2c_write(cam, 0x0F, 0x00);
err += zc0301_write_reg(cam, 0x01A9, 0x14);
err += zc0301_write_reg(cam, 0x01AA, 0x24);
err += zc0301_write_reg(cam, 0x0190, 0x00);
err += zc0301_write_reg(cam, 0x0191, 0x02);
err += zc0301_write_reg(cam, 0x0192, 0x1B);
err += zc0301_write_reg(cam, 0x0195, 0x00);
err += zc0301_write_reg(cam, 0x0196, 0x00);
err += zc0301_write_reg(cam, 0x0197, 0x4D);
err += zc0301_write_reg(cam, 0x018C, 0x10);
err += zc0301_write_reg(cam, 0x018F, 0x20);
err += zc0301_write_reg(cam, 0x001D, 0x44);
err += zc0301_write_reg(cam, 0x001E, 0x6F);
err += zc0301_write_reg(cam, 0x001F, 0xAD);
err += zc0301_write_reg(cam, 0x0020, 0xEB);
err += zc0301_write_reg(cam, 0x0087, 0x0F);
err += zc0301_write_reg(cam, 0x0088, 0x0E);
err += zc0301_write_reg(cam, 0x0180, 0x40);
err += zc0301_write_reg(cam, 0x0192, 0x1B);
err += zc0301_write_reg(cam, 0x0191, 0x02);
err += zc0301_write_reg(cam, 0x0190, 0x00);
err += zc0301_write_reg(cam, 0x0116, 0x1D);
err += zc0301_write_reg(cam, 0x0117, 0x40);
err += zc0301_write_reg(cam, 0x0118, 0x99);
err += zc0301_write_reg(cam, 0x0180, 0x42);
err += zc0301_write_reg(cam, 0x0116, 0x1D);
err += zc0301_write_reg(cam, 0x0117, 0x40);
err += zc0301_write_reg(cam, 0x0118, 0x99);
err += zc0301_write_reg(cam, 0x0007, 0x00);
err += zc0301_i2c_write(cam, 0x11, 0x01);
msleep(100);
return err;
}
static int pas202bcb_get_ctrl(struct zc0301_device* cam,
struct v4l2_control* ctrl)
{
switch (ctrl->id) {
case V4L2_CID_EXPOSURE:
{
int r1 = zc0301_i2c_read(cam, 0x04, 1),
r2 = zc0301_i2c_read(cam, 0x05, 1);
if (r1 < 0 || r2 < 0)
return -EIO;
ctrl->value = (r1 << 6) | (r2 & 0x3f);
}
return 0;
case V4L2_CID_RED_BALANCE:
if ((ctrl->value = zc0301_i2c_read(cam, 0x09, 1)) < 0)
return -EIO;
ctrl->value &= 0x0f;
return 0;
case V4L2_CID_BLUE_BALANCE:
if ((ctrl->value = zc0301_i2c_read(cam, 0x07, 1)) < 0)
return -EIO;
ctrl->value &= 0x0f;
return 0;
case V4L2_CID_GAIN:
if ((ctrl->value = zc0301_i2c_read(cam, 0x10, 1)) < 0)
return -EIO;
ctrl->value &= 0x1f;
return 0;
case ZC0301_V4L2_CID_GREEN_BALANCE:
if ((ctrl->value = zc0301_i2c_read(cam, 0x08, 1)) < 0)
return -EIO;
ctrl->value &= 0x0f;
return 0;
case ZC0301_V4L2_CID_DAC_MAGNITUDE:
if ((ctrl->value = zc0301_i2c_read(cam, 0x0c, 1)) < 0)
return -EIO;
return 0;
default:
return -EINVAL;
}
}
static int pas202bcb_set_ctrl(struct zc0301_device* cam,
const struct v4l2_control* ctrl)
{
int err = 0;
switch (ctrl->id) {
case V4L2_CID_EXPOSURE:
err += zc0301_i2c_write(cam, 0x04, ctrl->value >> 6);
err += zc0301_i2c_write(cam, 0x05, ctrl->value & 0x3f);
break;
case V4L2_CID_RED_BALANCE:
err += zc0301_i2c_write(cam, 0x09, ctrl->value);
break;
case V4L2_CID_BLUE_BALANCE:
err += zc0301_i2c_write(cam, 0x07, ctrl->value);
break;
case V4L2_CID_GAIN:
err += zc0301_i2c_write(cam, 0x10, ctrl->value);
break;
case ZC0301_V4L2_CID_GREEN_BALANCE:
err += zc0301_i2c_write(cam, 0x08, ctrl->value);
break;
case ZC0301_V4L2_CID_DAC_MAGNITUDE:
err += zc0301_i2c_write(cam, 0x0c, ctrl->value);
break;
default:
return -EINVAL;
}
err += zc0301_i2c_write(cam, 0x11, 0x01);
return err ? -EIO : 0;
}
static struct zc0301_sensor pas202bcb = {
.name = "PAS202BCB",
.init = &pas202bcb_init,
.qctrl = {
{
.id = V4L2_CID_EXPOSURE,
.type = V4L2_CTRL_TYPE_INTEGER,
.name = "exposure",
.minimum = 0x01e5,
.maximum = 0x3fff,
.step = 0x0001,
.default_value = 0x01e5,
.flags = 0,
},
{
.id = V4L2_CID_GAIN,
.type = V4L2_CTRL_TYPE_INTEGER,
.name = "global gain",
.minimum = 0x00,
.maximum = 0x1f,
.step = 0x01,
.default_value = 0x0c,
.flags = 0,
},
{
.id = V4L2_CID_RED_BALANCE,
.type = V4L2_CTRL_TYPE_INTEGER,
.name = "red balance",
.minimum = 0x00,
.maximum = 0x0f,
.step = 0x01,
.default_value = 0x01,
.flags = 0,
},
{
.id = V4L2_CID_BLUE_BALANCE,
.type = V4L2_CTRL_TYPE_INTEGER,
.name = "blue balance",
.minimum = 0x00,
.maximum = 0x0f,
.step = 0x01,
.default_value = 0x05,
.flags = 0,
},
{
.id = ZC0301_V4L2_CID_GREEN_BALANCE,
.type = V4L2_CTRL_TYPE_INTEGER,
.name = "green balance",
.minimum = 0x00,
.maximum = 0x0f,
.step = 0x01,
.default_value = 0x00,
.flags = 0,
},
{
.id = ZC0301_V4L2_CID_DAC_MAGNITUDE,
.type = V4L2_CTRL_TYPE_INTEGER,
.name = "DAC magnitude",
.minimum = 0x00,
.maximum = 0xff,
.step = 0x01,
.default_value = 0x04,
.flags = 0,
},
},
.get_ctrl = &pas202bcb_get_ctrl,
.set_ctrl = &pas202bcb_set_ctrl,
.cropcap = {
.bounds = {
.left = 0,
.top = 0,
.width = 640,
.height = 480,
},
.defrect = {
.left = 0,
.top = 0,
.width = 640,
.height = 480,
},
},
.pix_format = {
.width = 640,
.height = 480,
.pixelformat = V4L2_PIX_FMT_JPEG,
.priv = 16,
},
};
int zc0301_probe_pas202bcb(struct zc0301_device* cam)
{
int r0 = 0, r1 = 0, err = 0;
unsigned int pid = 0;
err += zc0301_write_reg(cam, 0x0000, 0x01);
err += zc0301_write_reg(cam, 0x0010, 0x0e);
err += zc0301_write_reg(cam, 0x0001, 0x01);
err += zc0301_write_reg(cam, 0x0012, 0x03);
err += zc0301_write_reg(cam, 0x0012, 0x01);
err += zc0301_write_reg(cam, 0x008d, 0x08);
msleep(10);
r0 = zc0301_i2c_read(cam, 0x00, 1);
r1 = zc0301_i2c_read(cam, 0x01, 1);
if (r0 < 0 || r1 < 0 || err)
return -EIO;
pid = (r0 << 4) | ((r1 & 0xf0) >> 4);
if (pid != 0x017)
return -ENODEV;
zc0301_attach_sensor(cam, &pas202bcb);
return 0;
}
drivers/usb/media/zc0301_sensor.h 0 → 100644
View file @ 60f78052
/***************************************************************************
* API for image sensors connected to the ZC030! Image Processor and *
* Control Chip *
* *
* Copyright (C) 2006 by Luca Risolia <luca.risolia@studio.unibo.it> *
* *
* 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. *
***************************************************************************/
#ifndef _ZC0301_SENSOR_H_
#define _ZC0301_SENSOR_H_
#include <linux/usb.h>
#include <linux/videodev.h>
#include <linux/device.h>
#include <linux/stddef.h>
#include <linux/errno.h>
#include <asm/types.h>
struct zc0301_device;
struct zc0301_sensor;
/*****************************************************************************/
extern int zc0301_probe_pas202bcb(struct zc0301_device* cam);
#define ZC0301_SENSOR_TABLE \
/* Weak detections must go at the end of the list */ \
static int (*zc0301_sensor_table[])(struct zc0301_device*) = { \
&zc0301_probe_pas202bcb, \
NULL, \
};
extern void
zc0301_attach_sensor(struct zc0301_device* cam,
struct zc0301_sensor* sensor);
#define ZC0301_USB_DEVICE(vend, prod, intclass) \
.match_flags = USB_DEVICE_ID_MATCH_DEVICE | \
USB_DEVICE_ID_MATCH_INT_CLASS, \
.idVendor = (vend), \
.idProduct = (prod), \
.bInterfaceClass = (intclass)
#define ZC0301_ID_TABLE \
static const struct usb_device_id zc0301_id_table[] = { \
{ ZC0301_USB_DEVICE(0x046d, 0x08ae, 0xff), }, /* PAS202BCB */ \
{ } \
};
/*****************************************************************************/
extern int zc0301_write_reg(struct zc0301_device*, u16 index, u16 value);
extern int zc0301_read_reg(struct zc0301_device*, u16 index);
extern int zc0301_i2c_write(struct zc0301_device*, u16 address, u16 value);
extern int zc0301_i2c_read(struct zc0301_device*, u16 address, u8 length);
/*****************************************************************************/
#define ZC0301_MAX_CTRLS V4L2_CID_LASTP1-V4L2_CID_BASE+10
#define ZC0301_V4L2_CID_DAC_MAGNITUDE V4L2_CID_PRIVATE_BASE
#define ZC0301_V4L2_CID_GREEN_BALANCE V4L2_CID_PRIVATE_BASE + 1
struct zc0301_sensor {
char name[32];
struct v4l2_queryctrl qctrl[ZC0301_MAX_CTRLS];
struct v4l2_cropcap cropcap;
struct v4l2_pix_format pix_format;
int (*init)(struct zc0301_device* cam);
int (*get_ctrl)(struct zc0301_device* cam,
struct v4l2_control* ctrl);
int (*set_ctrl)(struct zc0301_device* cam,
const struct v4l2_control* ctrl);
int (*set_crop)(struct zc0301_device* cam,
const struct v4l2_rect* rect);
const struct usb_device* usbdev;
/* Private */
struct v4l2_queryctrl _qctrl[ZC0301_MAX_CTRLS];
struct v4l2_rect _rect;
};
#endif /* _ZC0301_SENSOR_H_ */
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