// SPDX-License-Identifier: GPL-2.0-or-later
|
/*
|
* stk-webcam.c : Driver for Syntek 1125 USB webcam controller
|
*
|
* Copyright (C) 2006 Nicolas VIVIEN
|
* Copyright 2007-2008 Jaime Velasco Juan <jsagarribay@gmail.com>
|
*
|
* Some parts are inspired from cafe_ccic.c
|
* Copyright 2006-2007 Jonathan Corbet
|
*/
|
|
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
|
|
#include <linux/module.h>
|
#include <linux/init.h>
|
#include <linux/kernel.h>
|
#include <linux/errno.h>
|
#include <linux/slab.h>
|
|
#include <linux/dmi.h>
|
#include <linux/usb.h>
|
#include <linux/mm.h>
|
#include <linux/vmalloc.h>
|
#include <linux/videodev2.h>
|
#include <media/v4l2-common.h>
|
#include <media/v4l2-ioctl.h>
|
#include <media/v4l2-event.h>
|
|
#include "stk-webcam.h"
|
|
|
static int hflip = -1;
|
module_param(hflip, int, 0444);
|
MODULE_PARM_DESC(hflip, "Horizontal image flip (mirror). Defaults to 0");
|
|
static int vflip = -1;
|
module_param(vflip, int, 0444);
|
MODULE_PARM_DESC(vflip, "Vertical image flip. Defaults to 0");
|
|
static int debug;
|
module_param(debug, int, 0444);
|
MODULE_PARM_DESC(debug, "Debug v4l ioctls. Defaults to 0");
|
|
MODULE_LICENSE("GPL");
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MODULE_AUTHOR("Jaime Velasco Juan <jsagarribay@gmail.com> and Nicolas VIVIEN");
|
MODULE_DESCRIPTION("Syntek DC1125 webcam driver");
|
|
/* Some cameras have audio interfaces, we aren't interested in those */
|
static const struct usb_device_id stkwebcam_table[] = {
|
{ USB_DEVICE_AND_INTERFACE_INFO(0x174f, 0xa311, 0xff, 0xff, 0xff) },
|
{ USB_DEVICE_AND_INTERFACE_INFO(0x05e1, 0x0501, 0xff, 0xff, 0xff) },
|
{ }
|
};
|
MODULE_DEVICE_TABLE(usb, stkwebcam_table);
|
|
/*
|
* The stk webcam laptop module is mounted upside down in some laptops :(
|
*
|
* Some background information (thanks to Hans de Goede for providing this):
|
*
|
* 1) Once upon a time the stkwebcam driver was written
|
*
|
* 2) The webcam in question was used mostly in Asus laptop models, including
|
* the laptop of the original author of the driver, and in these models, in
|
* typical Asus fashion (see the long long list for uvc cams inside v4l-utils),
|
* they mounted the webcam-module the wrong way up. So the hflip and vflip
|
* module options were given a default value of 1 (the correct value for
|
* upside down mounted models)
|
*
|
* 3) Years later I got a bug report from a user with a laptop with stkwebcam,
|
* where the module was actually mounted the right way up, and thus showed
|
* upside down under Linux. So now I was facing the choice of 2 options:
|
*
|
* a) Add a not-upside-down list to stkwebcam, which overrules the default.
|
*
|
* b) Do it like all the other drivers do, and make the default right for
|
* cams mounted the proper way and add an upside-down model list, with
|
* models where we need to flip-by-default.
|
*
|
* Despite knowing that going b) would cause a period of pain where we were
|
* building the table I opted to go for option b), since a) is just too ugly,
|
* and worse different from how every other driver does it leading to
|
* confusion in the long run. This change was made in kernel 3.6.
|
*
|
* So for any user report about upside-down images since kernel 3.6 ask them
|
* to provide the output of 'sudo dmidecode' so the laptop can be added in
|
* the table below.
|
*/
|
static const struct dmi_system_id stk_upside_down_dmi_table[] = {
|
{
|
.ident = "ASUS G1",
|
.matches = {
|
DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."),
|
DMI_MATCH(DMI_PRODUCT_NAME, "G1")
|
}
|
}, {
|
.ident = "ASUS F3JC",
|
.matches = {
|
DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."),
|
DMI_MATCH(DMI_PRODUCT_NAME, "F3JC")
|
}
|
},
|
{
|
.ident = "T12Rg-H",
|
.matches = {
|
DMI_MATCH(DMI_SYS_VENDOR, "HCL Infosystems Limited"),
|
DMI_MATCH(DMI_PRODUCT_NAME, "T12Rg-H")
|
}
|
},
|
{
|
.ident = "ASUS A6VM",
|
.matches = {
|
DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."),
|
DMI_MATCH(DMI_PRODUCT_NAME, "A6VM")
|
}
|
},
|
{}
|
};
|
|
|
/*
|
* Basic stuff
|
*/
|
int stk_camera_write_reg(struct stk_camera *dev, u16 index, u8 value)
|
{
|
struct usb_device *udev = dev->udev;
|
int ret;
|
|
ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
|
0x01,
|
USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
|
value,
|
index,
|
NULL,
|
0,
|
500);
|
if (ret < 0)
|
return ret;
|
else
|
return 0;
|
}
|
|
int stk_camera_read_reg(struct stk_camera *dev, u16 index, u8 *value)
|
{
|
struct usb_device *udev = dev->udev;
|
unsigned char *buf;
|
int ret;
|
|
buf = kmalloc(sizeof(u8), GFP_KERNEL);
|
if (!buf)
|
return -ENOMEM;
|
|
ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
|
0x00,
|
USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
|
0x00,
|
index,
|
buf,
|
sizeof(u8),
|
500);
|
if (ret >= 0)
|
*value = *buf;
|
|
kfree(buf);
|
|
if (ret < 0)
|
return ret;
|
else
|
return 0;
|
}
|
|
static int stk_start_stream(struct stk_camera *dev)
|
{
|
u8 value;
|
int i, ret;
|
u8 value_116, value_117;
|
|
|
if (!is_present(dev))
|
return -ENODEV;
|
if (!is_memallocd(dev) || !is_initialised(dev)) {
|
pr_err("FIXME: Buffers are not allocated\n");
|
return -EFAULT;
|
}
|
ret = usb_set_interface(dev->udev, 0, 5);
|
|
if (ret < 0)
|
pr_err("usb_set_interface failed !\n");
|
if (stk_sensor_wakeup(dev))
|
pr_err("error awaking the sensor\n");
|
|
stk_camera_read_reg(dev, 0x0116, &value_116);
|
stk_camera_read_reg(dev, 0x0117, &value_117);
|
|
stk_camera_write_reg(dev, 0x0116, 0x0000);
|
stk_camera_write_reg(dev, 0x0117, 0x0000);
|
|
stk_camera_read_reg(dev, 0x0100, &value);
|
stk_camera_write_reg(dev, 0x0100, value | 0x80);
|
|
stk_camera_write_reg(dev, 0x0116, value_116);
|
stk_camera_write_reg(dev, 0x0117, value_117);
|
for (i = 0; i < MAX_ISO_BUFS; i++) {
|
if (dev->isobufs[i].urb) {
|
ret = usb_submit_urb(dev->isobufs[i].urb, GFP_KERNEL);
|
atomic_inc(&dev->urbs_used);
|
if (ret)
|
return ret;
|
}
|
}
|
set_streaming(dev);
|
return 0;
|
}
|
|
static int stk_stop_stream(struct stk_camera *dev)
|
{
|
u8 value;
|
int i;
|
if (is_present(dev)) {
|
stk_camera_read_reg(dev, 0x0100, &value);
|
stk_camera_write_reg(dev, 0x0100, value & ~0x80);
|
if (dev->isobufs != NULL) {
|
for (i = 0; i < MAX_ISO_BUFS; i++) {
|
if (dev->isobufs[i].urb)
|
usb_kill_urb(dev->isobufs[i].urb);
|
}
|
}
|
unset_streaming(dev);
|
|
if (usb_set_interface(dev->udev, 0, 0))
|
pr_err("usb_set_interface failed !\n");
|
if (stk_sensor_sleep(dev))
|
pr_err("error suspending the sensor\n");
|
}
|
return 0;
|
}
|
|
/*
|
* This seems to be the shortest init sequence we
|
* must do in order to find the sensor
|
* Bit 5 of reg. 0x0000 here is important, when reset to 0 the sensor
|
* is also reset. Maybe powers down it?
|
* Rest of values don't make a difference
|
*/
|
|
static struct regval stk1125_initvals[] = {
|
/*TODO: What means this sequence? */
|
{0x0000, 0x24},
|
{0x0100, 0x21},
|
{0x0002, 0x68},
|
{0x0003, 0x80},
|
{0x0005, 0x00},
|
{0x0007, 0x03},
|
{0x000d, 0x00},
|
{0x000f, 0x02},
|
{0x0300, 0x12},
|
{0x0350, 0x41},
|
{0x0351, 0x00},
|
{0x0352, 0x00},
|
{0x0353, 0x00},
|
{0x0018, 0x10},
|
{0x0019, 0x00},
|
{0x001b, 0x0e},
|
{0x001c, 0x46},
|
{0x0300, 0x80},
|
{0x001a, 0x04},
|
{0x0110, 0x00},
|
{0x0111, 0x00},
|
{0x0112, 0x00},
|
{0x0113, 0x00},
|
|
{0xffff, 0xff},
|
};
|
|
|
static int stk_initialise(struct stk_camera *dev)
|
{
|
struct regval *rv;
|
int ret;
|
if (!is_present(dev))
|
return -ENODEV;
|
if (is_initialised(dev))
|
return 0;
|
rv = stk1125_initvals;
|
while (rv->reg != 0xffff) {
|
ret = stk_camera_write_reg(dev, rv->reg, rv->val);
|
if (ret)
|
return ret;
|
rv++;
|
}
|
if (stk_sensor_init(dev) == 0) {
|
set_initialised(dev);
|
return 0;
|
} else
|
return -1;
|
}
|
|
/* *********************************************** */
|
/*
|
* This function is called as an URB transfert is complete (Isochronous pipe).
|
* So, the traitement is done in interrupt time, so it has be fast, not crash,
|
* and not stall. Neat.
|
*/
|
static void stk_isoc_handler(struct urb *urb)
|
{
|
int i;
|
int ret;
|
int framelen;
|
unsigned long flags;
|
|
unsigned char *fill = NULL;
|
unsigned char *iso_buf = NULL;
|
|
struct stk_camera *dev;
|
struct stk_sio_buffer *fb;
|
|
dev = (struct stk_camera *) urb->context;
|
|
if (dev == NULL) {
|
pr_err("isoc_handler called with NULL device !\n");
|
return;
|
}
|
|
if (urb->status == -ENOENT || urb->status == -ECONNRESET
|
|| urb->status == -ESHUTDOWN) {
|
atomic_dec(&dev->urbs_used);
|
return;
|
}
|
|
spin_lock_irqsave(&dev->spinlock, flags);
|
|
if (urb->status != -EINPROGRESS && urb->status != 0) {
|
pr_err("isoc_handler: urb->status == %d\n", urb->status);
|
goto resubmit;
|
}
|
|
if (list_empty(&dev->sio_avail)) {
|
/*FIXME Stop streaming after a while */
|
pr_err_ratelimited("isoc_handler without available buffer!\n");
|
goto resubmit;
|
}
|
fb = list_first_entry(&dev->sio_avail,
|
struct stk_sio_buffer, list);
|
fill = fb->buffer + fb->v4lbuf.bytesused;
|
|
for (i = 0; i < urb->number_of_packets; i++) {
|
if (urb->iso_frame_desc[i].status != 0) {
|
if (urb->iso_frame_desc[i].status != -EXDEV)
|
pr_err("Frame %d has error %d\n",
|
i, urb->iso_frame_desc[i].status);
|
continue;
|
}
|
framelen = urb->iso_frame_desc[i].actual_length;
|
iso_buf = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
|
|
if (framelen <= 4)
|
continue; /* no data */
|
|
/*
|
* we found something informational from there
|
* the isoc frames have to type of headers
|
* type1: 00 xx 00 00 or 20 xx 00 00
|
* type2: 80 xx 00 00 00 00 00 00 or a0 xx 00 00 00 00 00 00
|
* xx is a sequencer which has never been seen over 0x3f
|
* imho data written down looks like bayer, i see similarities
|
* after every 640 bytes
|
*/
|
if (*iso_buf & 0x80) {
|
framelen -= 8;
|
iso_buf += 8;
|
/* This marks a new frame */
|
if (fb->v4lbuf.bytesused != 0
|
&& fb->v4lbuf.bytesused != dev->frame_size) {
|
pr_err_ratelimited("frame %d, bytesused=%d, skipping\n",
|
i, fb->v4lbuf.bytesused);
|
fb->v4lbuf.bytesused = 0;
|
fill = fb->buffer;
|
} else if (fb->v4lbuf.bytesused == dev->frame_size) {
|
if (list_is_singular(&dev->sio_avail)) {
|
/* Always reuse the last buffer */
|
fb->v4lbuf.bytesused = 0;
|
fill = fb->buffer;
|
} else {
|
list_move_tail(dev->sio_avail.next,
|
&dev->sio_full);
|
wake_up(&dev->wait_frame);
|
fb = list_first_entry(&dev->sio_avail,
|
struct stk_sio_buffer, list);
|
fb->v4lbuf.bytesused = 0;
|
fill = fb->buffer;
|
}
|
}
|
} else {
|
framelen -= 4;
|
iso_buf += 4;
|
}
|
|
/* Our buffer is full !!! */
|
if (framelen + fb->v4lbuf.bytesused > dev->frame_size) {
|
pr_err_ratelimited("Frame buffer overflow, lost sync\n");
|
/*FIXME Do something here? */
|
continue;
|
}
|
spin_unlock_irqrestore(&dev->spinlock, flags);
|
memcpy(fill, iso_buf, framelen);
|
spin_lock_irqsave(&dev->spinlock, flags);
|
fill += framelen;
|
|
/* New size of our buffer */
|
fb->v4lbuf.bytesused += framelen;
|
}
|
|
resubmit:
|
spin_unlock_irqrestore(&dev->spinlock, flags);
|
urb->dev = dev->udev;
|
ret = usb_submit_urb(urb, GFP_ATOMIC);
|
if (ret != 0) {
|
pr_err("Error (%d) re-submitting urb in stk_isoc_handler\n",
|
ret);
|
}
|
}
|
|
/* -------------------------------------------- */
|
|
static int stk_prepare_iso(struct stk_camera *dev)
|
{
|
void *kbuf;
|
int i, j;
|
struct urb *urb;
|
struct usb_device *udev;
|
|
if (dev == NULL)
|
return -ENXIO;
|
udev = dev->udev;
|
|
if (dev->isobufs)
|
pr_err("isobufs already allocated. Bad\n");
|
else
|
dev->isobufs = kcalloc(MAX_ISO_BUFS, sizeof(*dev->isobufs),
|
GFP_KERNEL);
|
if (dev->isobufs == NULL) {
|
pr_err("Unable to allocate iso buffers\n");
|
return -ENOMEM;
|
}
|
for (i = 0; i < MAX_ISO_BUFS; i++) {
|
if (dev->isobufs[i].data == NULL) {
|
kbuf = kzalloc(ISO_BUFFER_SIZE, GFP_KERNEL);
|
if (kbuf == NULL) {
|
pr_err("Failed to allocate iso buffer %d\n", i);
|
goto isobufs_out;
|
}
|
dev->isobufs[i].data = kbuf;
|
} else
|
pr_err("isobuf data already allocated\n");
|
if (dev->isobufs[i].urb == NULL) {
|
urb = usb_alloc_urb(ISO_FRAMES_PER_DESC, GFP_KERNEL);
|
if (urb == NULL)
|
goto isobufs_out;
|
dev->isobufs[i].urb = urb;
|
} else {
|
pr_err("Killing URB\n");
|
usb_kill_urb(dev->isobufs[i].urb);
|
urb = dev->isobufs[i].urb;
|
}
|
urb->interval = 1;
|
urb->dev = udev;
|
urb->pipe = usb_rcvisocpipe(udev, dev->isoc_ep);
|
urb->transfer_flags = URB_ISO_ASAP;
|
urb->transfer_buffer = dev->isobufs[i].data;
|
urb->transfer_buffer_length = ISO_BUFFER_SIZE;
|
urb->complete = stk_isoc_handler;
|
urb->context = dev;
|
urb->start_frame = 0;
|
urb->number_of_packets = ISO_FRAMES_PER_DESC;
|
|
for (j = 0; j < ISO_FRAMES_PER_DESC; j++) {
|
urb->iso_frame_desc[j].offset = j * ISO_MAX_FRAME_SIZE;
|
urb->iso_frame_desc[j].length = ISO_MAX_FRAME_SIZE;
|
}
|
}
|
set_memallocd(dev);
|
return 0;
|
|
isobufs_out:
|
for (i = 0; i < MAX_ISO_BUFS && dev->isobufs[i].data; i++)
|
kfree(dev->isobufs[i].data);
|
for (i = 0; i < MAX_ISO_BUFS && dev->isobufs[i].urb; i++)
|
usb_free_urb(dev->isobufs[i].urb);
|
kfree(dev->isobufs);
|
dev->isobufs = NULL;
|
return -ENOMEM;
|
}
|
|
static void stk_clean_iso(struct stk_camera *dev)
|
{
|
int i;
|
|
if (dev == NULL || dev->isobufs == NULL)
|
return;
|
|
for (i = 0; i < MAX_ISO_BUFS; i++) {
|
struct urb *urb;
|
|
urb = dev->isobufs[i].urb;
|
if (urb) {
|
if (atomic_read(&dev->urbs_used) && is_present(dev))
|
usb_kill_urb(urb);
|
usb_free_urb(urb);
|
}
|
kfree(dev->isobufs[i].data);
|
}
|
kfree(dev->isobufs);
|
dev->isobufs = NULL;
|
unset_memallocd(dev);
|
}
|
|
static int stk_setup_siobuf(struct stk_camera *dev, int index)
|
{
|
struct stk_sio_buffer *buf = dev->sio_bufs + index;
|
INIT_LIST_HEAD(&buf->list);
|
buf->v4lbuf.length = PAGE_ALIGN(dev->frame_size);
|
buf->buffer = vmalloc_user(buf->v4lbuf.length);
|
if (buf->buffer == NULL)
|
return -ENOMEM;
|
buf->mapcount = 0;
|
buf->dev = dev;
|
buf->v4lbuf.index = index;
|
buf->v4lbuf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
|
buf->v4lbuf.flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
|
buf->v4lbuf.field = V4L2_FIELD_NONE;
|
buf->v4lbuf.memory = V4L2_MEMORY_MMAP;
|
buf->v4lbuf.m.offset = 2*index*buf->v4lbuf.length;
|
return 0;
|
}
|
|
static int stk_free_sio_buffers(struct stk_camera *dev)
|
{
|
int i;
|
int nbufs;
|
unsigned long flags;
|
if (dev->n_sbufs == 0 || dev->sio_bufs == NULL)
|
return 0;
|
/*
|
* If any buffers are mapped, we cannot free them at all.
|
*/
|
for (i = 0; i < dev->n_sbufs; i++) {
|
if (dev->sio_bufs[i].mapcount > 0)
|
return -EBUSY;
|
}
|
/*
|
* OK, let's do it.
|
*/
|
spin_lock_irqsave(&dev->spinlock, flags);
|
INIT_LIST_HEAD(&dev->sio_avail);
|
INIT_LIST_HEAD(&dev->sio_full);
|
nbufs = dev->n_sbufs;
|
dev->n_sbufs = 0;
|
spin_unlock_irqrestore(&dev->spinlock, flags);
|
for (i = 0; i < nbufs; i++)
|
vfree(dev->sio_bufs[i].buffer);
|
kfree(dev->sio_bufs);
|
dev->sio_bufs = NULL;
|
return 0;
|
}
|
|
static int stk_prepare_sio_buffers(struct stk_camera *dev, unsigned n_sbufs)
|
{
|
int i;
|
if (dev->sio_bufs != NULL)
|
pr_err("sio_bufs already allocated\n");
|
else {
|
dev->sio_bufs = kcalloc(n_sbufs,
|
sizeof(struct stk_sio_buffer),
|
GFP_KERNEL);
|
if (dev->sio_bufs == NULL)
|
return -ENOMEM;
|
for (i = 0; i < n_sbufs; i++) {
|
if (stk_setup_siobuf(dev, i))
|
return (dev->n_sbufs > 1 ? 0 : -ENOMEM);
|
dev->n_sbufs = i+1;
|
}
|
}
|
return 0;
|
}
|
|
static int stk_allocate_buffers(struct stk_camera *dev, unsigned n_sbufs)
|
{
|
int err;
|
err = stk_prepare_iso(dev);
|
if (err) {
|
stk_clean_iso(dev);
|
return err;
|
}
|
err = stk_prepare_sio_buffers(dev, n_sbufs);
|
if (err) {
|
stk_free_sio_buffers(dev);
|
return err;
|
}
|
return 0;
|
}
|
|
static void stk_free_buffers(struct stk_camera *dev)
|
{
|
stk_clean_iso(dev);
|
stk_free_sio_buffers(dev);
|
}
|
/* -------------------------------------------- */
|
|
/* v4l file operations */
|
|
static int v4l_stk_open(struct file *fp)
|
{
|
struct stk_camera *dev = video_drvdata(fp);
|
int err;
|
|
if (dev == NULL || !is_present(dev))
|
return -ENXIO;
|
|
if (mutex_lock_interruptible(&dev->lock))
|
return -ERESTARTSYS;
|
if (!dev->first_init)
|
stk_camera_write_reg(dev, 0x0, 0x24);
|
else
|
dev->first_init = 0;
|
|
err = v4l2_fh_open(fp);
|
if (!err)
|
usb_autopm_get_interface(dev->interface);
|
mutex_unlock(&dev->lock);
|
return err;
|
}
|
|
static int v4l_stk_release(struct file *fp)
|
{
|
struct stk_camera *dev = video_drvdata(fp);
|
|
mutex_lock(&dev->lock);
|
if (dev->owner == fp) {
|
stk_stop_stream(dev);
|
stk_free_buffers(dev);
|
stk_camera_write_reg(dev, 0x0, 0x49); /* turn off the LED */
|
unset_initialised(dev);
|
dev->owner = NULL;
|
}
|
|
usb_autopm_put_interface(dev->interface);
|
mutex_unlock(&dev->lock);
|
return v4l2_fh_release(fp);
|
}
|
|
static ssize_t stk_read(struct file *fp, char __user *buf,
|
size_t count, loff_t *f_pos)
|
{
|
int i;
|
int ret;
|
unsigned long flags;
|
struct stk_sio_buffer *sbuf;
|
struct stk_camera *dev = video_drvdata(fp);
|
|
if (!is_present(dev))
|
return -EIO;
|
if (dev->owner && (!dev->reading || dev->owner != fp))
|
return -EBUSY;
|
dev->owner = fp;
|
if (!is_streaming(dev)) {
|
if (stk_initialise(dev)
|
|| stk_allocate_buffers(dev, 3)
|
|| stk_start_stream(dev))
|
return -ENOMEM;
|
dev->reading = 1;
|
spin_lock_irqsave(&dev->spinlock, flags);
|
for (i = 0; i < dev->n_sbufs; i++) {
|
list_add_tail(&dev->sio_bufs[i].list, &dev->sio_avail);
|
dev->sio_bufs[i].v4lbuf.flags = V4L2_BUF_FLAG_QUEUED;
|
}
|
spin_unlock_irqrestore(&dev->spinlock, flags);
|
}
|
if (*f_pos == 0) {
|
if (fp->f_flags & O_NONBLOCK && list_empty(&dev->sio_full))
|
return -EWOULDBLOCK;
|
ret = wait_event_interruptible(dev->wait_frame,
|
!list_empty(&dev->sio_full) || !is_present(dev));
|
if (ret)
|
return ret;
|
if (!is_present(dev))
|
return -EIO;
|
}
|
if (count + *f_pos > dev->frame_size)
|
count = dev->frame_size - *f_pos;
|
spin_lock_irqsave(&dev->spinlock, flags);
|
if (list_empty(&dev->sio_full)) {
|
spin_unlock_irqrestore(&dev->spinlock, flags);
|
pr_err("BUG: No siobufs ready\n");
|
return 0;
|
}
|
sbuf = list_first_entry(&dev->sio_full, struct stk_sio_buffer, list);
|
spin_unlock_irqrestore(&dev->spinlock, flags);
|
|
if (copy_to_user(buf, sbuf->buffer + *f_pos, count))
|
return -EFAULT;
|
|
*f_pos += count;
|
|
if (*f_pos >= dev->frame_size) {
|
*f_pos = 0;
|
spin_lock_irqsave(&dev->spinlock, flags);
|
list_move_tail(&sbuf->list, &dev->sio_avail);
|
spin_unlock_irqrestore(&dev->spinlock, flags);
|
}
|
return count;
|
}
|
|
static ssize_t v4l_stk_read(struct file *fp, char __user *buf,
|
size_t count, loff_t *f_pos)
|
{
|
struct stk_camera *dev = video_drvdata(fp);
|
int ret;
|
|
if (mutex_lock_interruptible(&dev->lock))
|
return -ERESTARTSYS;
|
ret = stk_read(fp, buf, count, f_pos);
|
mutex_unlock(&dev->lock);
|
return ret;
|
}
|
|
static __poll_t v4l_stk_poll(struct file *fp, poll_table *wait)
|
{
|
struct stk_camera *dev = video_drvdata(fp);
|
__poll_t res = v4l2_ctrl_poll(fp, wait);
|
|
poll_wait(fp, &dev->wait_frame, wait);
|
|
if (!is_present(dev))
|
return EPOLLERR;
|
|
if (!list_empty(&dev->sio_full))
|
return res | EPOLLIN | EPOLLRDNORM;
|
|
return res;
|
}
|
|
|
static void stk_v4l_vm_open(struct vm_area_struct *vma)
|
{
|
struct stk_sio_buffer *sbuf = vma->vm_private_data;
|
sbuf->mapcount++;
|
}
|
static void stk_v4l_vm_close(struct vm_area_struct *vma)
|
{
|
struct stk_sio_buffer *sbuf = vma->vm_private_data;
|
sbuf->mapcount--;
|
if (sbuf->mapcount == 0)
|
sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_MAPPED;
|
}
|
static const struct vm_operations_struct stk_v4l_vm_ops = {
|
.open = stk_v4l_vm_open,
|
.close = stk_v4l_vm_close
|
};
|
|
static int v4l_stk_mmap(struct file *fp, struct vm_area_struct *vma)
|
{
|
unsigned int i;
|
int ret;
|
unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
|
struct stk_camera *dev = video_drvdata(fp);
|
struct stk_sio_buffer *sbuf = NULL;
|
|
if (!(vma->vm_flags & VM_WRITE) || !(vma->vm_flags & VM_SHARED))
|
return -EINVAL;
|
|
for (i = 0; i < dev->n_sbufs; i++) {
|
if (dev->sio_bufs[i].v4lbuf.m.offset == offset) {
|
sbuf = dev->sio_bufs + i;
|
break;
|
}
|
}
|
if (sbuf == NULL)
|
return -EINVAL;
|
ret = remap_vmalloc_range(vma, sbuf->buffer, 0);
|
if (ret)
|
return ret;
|
vma->vm_flags |= VM_DONTEXPAND;
|
vma->vm_private_data = sbuf;
|
vma->vm_ops = &stk_v4l_vm_ops;
|
sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_MAPPED;
|
stk_v4l_vm_open(vma);
|
return 0;
|
}
|
|
/* v4l ioctl handlers */
|
|
static int stk_vidioc_querycap(struct file *filp,
|
void *priv, struct v4l2_capability *cap)
|
{
|
struct stk_camera *dev = video_drvdata(filp);
|
|
strscpy(cap->driver, "stk", sizeof(cap->driver));
|
strscpy(cap->card, "stk", sizeof(cap->card));
|
usb_make_path(dev->udev, cap->bus_info, sizeof(cap->bus_info));
|
return 0;
|
}
|
|
static int stk_vidioc_enum_input(struct file *filp,
|
void *priv, struct v4l2_input *input)
|
{
|
if (input->index != 0)
|
return -EINVAL;
|
|
strscpy(input->name, "Syntek USB Camera", sizeof(input->name));
|
input->type = V4L2_INPUT_TYPE_CAMERA;
|
return 0;
|
}
|
|
|
static int stk_vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
|
{
|
*i = 0;
|
return 0;
|
}
|
|
static int stk_vidioc_s_input(struct file *filp, void *priv, unsigned int i)
|
{
|
return i ? -EINVAL : 0;
|
}
|
|
static int stk_s_ctrl(struct v4l2_ctrl *ctrl)
|
{
|
struct stk_camera *dev =
|
container_of(ctrl->handler, struct stk_camera, hdl);
|
|
switch (ctrl->id) {
|
case V4L2_CID_BRIGHTNESS:
|
return stk_sensor_set_brightness(dev, ctrl->val);
|
case V4L2_CID_HFLIP:
|
if (dmi_check_system(stk_upside_down_dmi_table))
|
dev->vsettings.hflip = !ctrl->val;
|
else
|
dev->vsettings.hflip = ctrl->val;
|
return 0;
|
case V4L2_CID_VFLIP:
|
if (dmi_check_system(stk_upside_down_dmi_table))
|
dev->vsettings.vflip = !ctrl->val;
|
else
|
dev->vsettings.vflip = ctrl->val;
|
return 0;
|
default:
|
return -EINVAL;
|
}
|
return 0;
|
}
|
|
|
static int stk_vidioc_enum_fmt_vid_cap(struct file *filp,
|
void *priv, struct v4l2_fmtdesc *fmtd)
|
{
|
switch (fmtd->index) {
|
case 0:
|
fmtd->pixelformat = V4L2_PIX_FMT_RGB565;
|
break;
|
case 1:
|
fmtd->pixelformat = V4L2_PIX_FMT_RGB565X;
|
break;
|
case 2:
|
fmtd->pixelformat = V4L2_PIX_FMT_UYVY;
|
break;
|
case 3:
|
fmtd->pixelformat = V4L2_PIX_FMT_SBGGR8;
|
break;
|
case 4:
|
fmtd->pixelformat = V4L2_PIX_FMT_YUYV;
|
break;
|
default:
|
return -EINVAL;
|
}
|
return 0;
|
}
|
|
static struct stk_size {
|
unsigned w;
|
unsigned h;
|
enum stk_mode m;
|
} stk_sizes[] = {
|
{ .w = 1280, .h = 1024, .m = MODE_SXGA, },
|
{ .w = 640, .h = 480, .m = MODE_VGA, },
|
{ .w = 352, .h = 288, .m = MODE_CIF, },
|
{ .w = 320, .h = 240, .m = MODE_QVGA, },
|
{ .w = 176, .h = 144, .m = MODE_QCIF, },
|
};
|
|
static int stk_vidioc_g_fmt_vid_cap(struct file *filp,
|
void *priv, struct v4l2_format *f)
|
{
|
struct v4l2_pix_format *pix_format = &f->fmt.pix;
|
struct stk_camera *dev = video_drvdata(filp);
|
int i;
|
|
for (i = 0; i < ARRAY_SIZE(stk_sizes) &&
|
stk_sizes[i].m != dev->vsettings.mode; i++)
|
;
|
if (i == ARRAY_SIZE(stk_sizes)) {
|
pr_err("ERROR: mode invalid\n");
|
return -EINVAL;
|
}
|
pix_format->width = stk_sizes[i].w;
|
pix_format->height = stk_sizes[i].h;
|
pix_format->field = V4L2_FIELD_NONE;
|
pix_format->colorspace = V4L2_COLORSPACE_SRGB;
|
pix_format->pixelformat = dev->vsettings.palette;
|
if (dev->vsettings.palette == V4L2_PIX_FMT_SBGGR8)
|
pix_format->bytesperline = pix_format->width;
|
else
|
pix_format->bytesperline = 2 * pix_format->width;
|
pix_format->sizeimage = pix_format->bytesperline
|
* pix_format->height;
|
return 0;
|
}
|
|
static int stk_try_fmt_vid_cap(struct file *filp,
|
struct v4l2_format *fmtd, int *idx)
|
{
|
int i;
|
switch (fmtd->fmt.pix.pixelformat) {
|
case V4L2_PIX_FMT_RGB565:
|
case V4L2_PIX_FMT_RGB565X:
|
case V4L2_PIX_FMT_UYVY:
|
case V4L2_PIX_FMT_YUYV:
|
case V4L2_PIX_FMT_SBGGR8:
|
break;
|
default:
|
return -EINVAL;
|
}
|
for (i = 1; i < ARRAY_SIZE(stk_sizes); i++) {
|
if (fmtd->fmt.pix.width > stk_sizes[i].w)
|
break;
|
}
|
if (i == ARRAY_SIZE(stk_sizes)
|
|| (abs(fmtd->fmt.pix.width - stk_sizes[i-1].w)
|
< abs(fmtd->fmt.pix.width - stk_sizes[i].w))) {
|
fmtd->fmt.pix.height = stk_sizes[i-1].h;
|
fmtd->fmt.pix.width = stk_sizes[i-1].w;
|
if (idx)
|
*idx = i - 1;
|
} else {
|
fmtd->fmt.pix.height = stk_sizes[i].h;
|
fmtd->fmt.pix.width = stk_sizes[i].w;
|
if (idx)
|
*idx = i;
|
}
|
|
fmtd->fmt.pix.field = V4L2_FIELD_NONE;
|
fmtd->fmt.pix.colorspace = V4L2_COLORSPACE_SRGB;
|
if (fmtd->fmt.pix.pixelformat == V4L2_PIX_FMT_SBGGR8)
|
fmtd->fmt.pix.bytesperline = fmtd->fmt.pix.width;
|
else
|
fmtd->fmt.pix.bytesperline = 2 * fmtd->fmt.pix.width;
|
fmtd->fmt.pix.sizeimage = fmtd->fmt.pix.bytesperline
|
* fmtd->fmt.pix.height;
|
return 0;
|
}
|
|
static int stk_vidioc_try_fmt_vid_cap(struct file *filp,
|
void *priv, struct v4l2_format *fmtd)
|
{
|
return stk_try_fmt_vid_cap(filp, fmtd, NULL);
|
}
|
|
static int stk_setup_format(struct stk_camera *dev)
|
{
|
int i = 0;
|
int depth;
|
if (dev->vsettings.palette == V4L2_PIX_FMT_SBGGR8)
|
depth = 1;
|
else
|
depth = 2;
|
while (i < ARRAY_SIZE(stk_sizes) &&
|
stk_sizes[i].m != dev->vsettings.mode)
|
i++;
|
if (i == ARRAY_SIZE(stk_sizes)) {
|
pr_err("Something is broken in %s\n", __func__);
|
return -EFAULT;
|
}
|
/* This registers controls some timings, not sure of what. */
|
stk_camera_write_reg(dev, 0x001b, 0x0e);
|
if (dev->vsettings.mode == MODE_SXGA)
|
stk_camera_write_reg(dev, 0x001c, 0x0e);
|
else
|
stk_camera_write_reg(dev, 0x001c, 0x46);
|
/*
|
* Registers 0x0115 0x0114 are the size of each line (bytes),
|
* regs 0x0117 0x0116 are the height of the image.
|
*/
|
stk_camera_write_reg(dev, 0x0115,
|
((stk_sizes[i].w * depth) >> 8) & 0xff);
|
stk_camera_write_reg(dev, 0x0114,
|
(stk_sizes[i].w * depth) & 0xff);
|
stk_camera_write_reg(dev, 0x0117,
|
(stk_sizes[i].h >> 8) & 0xff);
|
stk_camera_write_reg(dev, 0x0116,
|
stk_sizes[i].h & 0xff);
|
return stk_sensor_configure(dev);
|
}
|
|
static int stk_vidioc_s_fmt_vid_cap(struct file *filp,
|
void *priv, struct v4l2_format *fmtd)
|
{
|
int ret;
|
int idx;
|
struct stk_camera *dev = video_drvdata(filp);
|
|
if (dev == NULL)
|
return -ENODEV;
|
if (!is_present(dev))
|
return -ENODEV;
|
if (is_streaming(dev))
|
return -EBUSY;
|
if (dev->owner)
|
return -EBUSY;
|
ret = stk_try_fmt_vid_cap(filp, fmtd, &idx);
|
if (ret)
|
return ret;
|
|
dev->vsettings.palette = fmtd->fmt.pix.pixelformat;
|
stk_free_buffers(dev);
|
dev->frame_size = fmtd->fmt.pix.sizeimage;
|
dev->vsettings.mode = stk_sizes[idx].m;
|
|
stk_initialise(dev);
|
return stk_setup_format(dev);
|
}
|
|
static int stk_vidioc_reqbufs(struct file *filp,
|
void *priv, struct v4l2_requestbuffers *rb)
|
{
|
struct stk_camera *dev = video_drvdata(filp);
|
|
if (dev == NULL)
|
return -ENODEV;
|
if (rb->memory != V4L2_MEMORY_MMAP)
|
return -EINVAL;
|
if (is_streaming(dev)
|
|| (dev->owner && dev->owner != filp))
|
return -EBUSY;
|
stk_free_buffers(dev);
|
if (rb->count == 0) {
|
stk_camera_write_reg(dev, 0x0, 0x49); /* turn off the LED */
|
unset_initialised(dev);
|
dev->owner = NULL;
|
return 0;
|
}
|
dev->owner = filp;
|
|
/*FIXME If they ask for zero, we must stop streaming and free */
|
if (rb->count < 3)
|
rb->count = 3;
|
/* Arbitrary limit */
|
else if (rb->count > 5)
|
rb->count = 5;
|
|
stk_allocate_buffers(dev, rb->count);
|
rb->count = dev->n_sbufs;
|
return 0;
|
}
|
|
static int stk_vidioc_querybuf(struct file *filp,
|
void *priv, struct v4l2_buffer *buf)
|
{
|
struct stk_camera *dev = video_drvdata(filp);
|
struct stk_sio_buffer *sbuf;
|
|
if (buf->index >= dev->n_sbufs)
|
return -EINVAL;
|
sbuf = dev->sio_bufs + buf->index;
|
*buf = sbuf->v4lbuf;
|
return 0;
|
}
|
|
static int stk_vidioc_qbuf(struct file *filp,
|
void *priv, struct v4l2_buffer *buf)
|
{
|
struct stk_camera *dev = video_drvdata(filp);
|
struct stk_sio_buffer *sbuf;
|
unsigned long flags;
|
|
if (buf->memory != V4L2_MEMORY_MMAP)
|
return -EINVAL;
|
|
if (buf->index >= dev->n_sbufs)
|
return -EINVAL;
|
sbuf = dev->sio_bufs + buf->index;
|
if (sbuf->v4lbuf.flags & V4L2_BUF_FLAG_QUEUED)
|
return 0;
|
sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_QUEUED;
|
sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_DONE;
|
spin_lock_irqsave(&dev->spinlock, flags);
|
list_add_tail(&sbuf->list, &dev->sio_avail);
|
*buf = sbuf->v4lbuf;
|
spin_unlock_irqrestore(&dev->spinlock, flags);
|
return 0;
|
}
|
|
static int stk_vidioc_dqbuf(struct file *filp,
|
void *priv, struct v4l2_buffer *buf)
|
{
|
struct stk_camera *dev = video_drvdata(filp);
|
struct stk_sio_buffer *sbuf;
|
unsigned long flags;
|
int ret;
|
|
if (!is_streaming(dev))
|
return -EINVAL;
|
|
if (filp->f_flags & O_NONBLOCK && list_empty(&dev->sio_full))
|
return -EWOULDBLOCK;
|
ret = wait_event_interruptible(dev->wait_frame,
|
!list_empty(&dev->sio_full) || !is_present(dev));
|
if (ret)
|
return ret;
|
if (!is_present(dev))
|
return -EIO;
|
|
spin_lock_irqsave(&dev->spinlock, flags);
|
sbuf = list_first_entry(&dev->sio_full, struct stk_sio_buffer, list);
|
list_del_init(&sbuf->list);
|
spin_unlock_irqrestore(&dev->spinlock, flags);
|
sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_QUEUED;
|
sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_DONE;
|
sbuf->v4lbuf.sequence = ++dev->sequence;
|
v4l2_buffer_set_timestamp(&sbuf->v4lbuf, ktime_get_ns());
|
|
*buf = sbuf->v4lbuf;
|
return 0;
|
}
|
|
static int stk_vidioc_streamon(struct file *filp,
|
void *priv, enum v4l2_buf_type type)
|
{
|
struct stk_camera *dev = video_drvdata(filp);
|
if (is_streaming(dev))
|
return 0;
|
if (dev->sio_bufs == NULL)
|
return -EINVAL;
|
dev->sequence = 0;
|
return stk_start_stream(dev);
|
}
|
|
static int stk_vidioc_streamoff(struct file *filp,
|
void *priv, enum v4l2_buf_type type)
|
{
|
struct stk_camera *dev = video_drvdata(filp);
|
unsigned long flags;
|
int i;
|
stk_stop_stream(dev);
|
spin_lock_irqsave(&dev->spinlock, flags);
|
INIT_LIST_HEAD(&dev->sio_avail);
|
INIT_LIST_HEAD(&dev->sio_full);
|
for (i = 0; i < dev->n_sbufs; i++) {
|
INIT_LIST_HEAD(&dev->sio_bufs[i].list);
|
dev->sio_bufs[i].v4lbuf.flags = 0;
|
}
|
spin_unlock_irqrestore(&dev->spinlock, flags);
|
return 0;
|
}
|
|
|
static int stk_vidioc_g_parm(struct file *filp,
|
void *priv, struct v4l2_streamparm *sp)
|
{
|
/*FIXME This is not correct */
|
sp->parm.capture.timeperframe.numerator = 1;
|
sp->parm.capture.timeperframe.denominator = 30;
|
sp->parm.capture.readbuffers = 2;
|
return 0;
|
}
|
|
static int stk_vidioc_enum_framesizes(struct file *filp,
|
void *priv, struct v4l2_frmsizeenum *frms)
|
{
|
if (frms->index >= ARRAY_SIZE(stk_sizes))
|
return -EINVAL;
|
switch (frms->pixel_format) {
|
case V4L2_PIX_FMT_RGB565:
|
case V4L2_PIX_FMT_RGB565X:
|
case V4L2_PIX_FMT_UYVY:
|
case V4L2_PIX_FMT_YUYV:
|
case V4L2_PIX_FMT_SBGGR8:
|
frms->type = V4L2_FRMSIZE_TYPE_DISCRETE;
|
frms->discrete.width = stk_sizes[frms->index].w;
|
frms->discrete.height = stk_sizes[frms->index].h;
|
return 0;
|
default: return -EINVAL;
|
}
|
}
|
|
static const struct v4l2_ctrl_ops stk_ctrl_ops = {
|
.s_ctrl = stk_s_ctrl,
|
};
|
|
static const struct v4l2_file_operations v4l_stk_fops = {
|
.owner = THIS_MODULE,
|
.open = v4l_stk_open,
|
.release = v4l_stk_release,
|
.read = v4l_stk_read,
|
.poll = v4l_stk_poll,
|
.mmap = v4l_stk_mmap,
|
.unlocked_ioctl = video_ioctl2,
|
};
|
|
static const struct v4l2_ioctl_ops v4l_stk_ioctl_ops = {
|
.vidioc_querycap = stk_vidioc_querycap,
|
.vidioc_enum_fmt_vid_cap = stk_vidioc_enum_fmt_vid_cap,
|
.vidioc_try_fmt_vid_cap = stk_vidioc_try_fmt_vid_cap,
|
.vidioc_s_fmt_vid_cap = stk_vidioc_s_fmt_vid_cap,
|
.vidioc_g_fmt_vid_cap = stk_vidioc_g_fmt_vid_cap,
|
.vidioc_enum_input = stk_vidioc_enum_input,
|
.vidioc_s_input = stk_vidioc_s_input,
|
.vidioc_g_input = stk_vidioc_g_input,
|
.vidioc_reqbufs = stk_vidioc_reqbufs,
|
.vidioc_querybuf = stk_vidioc_querybuf,
|
.vidioc_qbuf = stk_vidioc_qbuf,
|
.vidioc_dqbuf = stk_vidioc_dqbuf,
|
.vidioc_streamon = stk_vidioc_streamon,
|
.vidioc_streamoff = stk_vidioc_streamoff,
|
.vidioc_g_parm = stk_vidioc_g_parm,
|
.vidioc_enum_framesizes = stk_vidioc_enum_framesizes,
|
.vidioc_log_status = v4l2_ctrl_log_status,
|
.vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
|
.vidioc_unsubscribe_event = v4l2_event_unsubscribe,
|
};
|
|
static void stk_v4l_dev_release(struct video_device *vd)
|
{
|
struct stk_camera *dev = vdev_to_camera(vd);
|
|
if (dev->sio_bufs != NULL || dev->isobufs != NULL)
|
pr_err("We are leaking memory\n");
|
usb_put_intf(dev->interface);
|
}
|
|
static const struct video_device stk_v4l_data = {
|
.name = "stkwebcam",
|
.fops = &v4l_stk_fops,
|
.ioctl_ops = &v4l_stk_ioctl_ops,
|
.release = stk_v4l_dev_release,
|
};
|
|
|
static int stk_register_video_device(struct stk_camera *dev)
|
{
|
int err;
|
|
dev->vdev = stk_v4l_data;
|
dev->vdev.lock = &dev->lock;
|
dev->vdev.v4l2_dev = &dev->v4l2_dev;
|
dev->vdev.device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE |
|
V4L2_CAP_STREAMING;
|
video_set_drvdata(&dev->vdev, dev);
|
err = video_register_device(&dev->vdev, VFL_TYPE_VIDEO, -1);
|
if (err)
|
pr_err("v4l registration failed\n");
|
else
|
pr_info("Syntek USB2.0 Camera is now controlling device %s\n",
|
video_device_node_name(&dev->vdev));
|
return err;
|
}
|
|
|
/* USB Stuff */
|
|
static int stk_camera_probe(struct usb_interface *interface,
|
const struct usb_device_id *id)
|
{
|
struct v4l2_ctrl_handler *hdl;
|
int err = 0;
|
int i;
|
|
struct stk_camera *dev = NULL;
|
struct usb_device *udev = interface_to_usbdev(interface);
|
struct usb_host_interface *iface_desc;
|
struct usb_endpoint_descriptor *endpoint;
|
|
dev = kzalloc(sizeof(struct stk_camera), GFP_KERNEL);
|
if (dev == NULL) {
|
pr_err("Out of memory !\n");
|
return -ENOMEM;
|
}
|
err = v4l2_device_register(&interface->dev, &dev->v4l2_dev);
|
if (err < 0) {
|
dev_err(&udev->dev, "couldn't register v4l2_device\n");
|
kfree(dev);
|
return err;
|
}
|
hdl = &dev->hdl;
|
v4l2_ctrl_handler_init(hdl, 3);
|
v4l2_ctrl_new_std(hdl, &stk_ctrl_ops,
|
V4L2_CID_BRIGHTNESS, 0, 0xff, 0x1, 0x60);
|
v4l2_ctrl_new_std(hdl, &stk_ctrl_ops,
|
V4L2_CID_HFLIP, 0, 1, 1, 1);
|
v4l2_ctrl_new_std(hdl, &stk_ctrl_ops,
|
V4L2_CID_VFLIP, 0, 1, 1, 1);
|
if (hdl->error) {
|
err = hdl->error;
|
dev_err(&udev->dev, "couldn't register control\n");
|
goto error;
|
}
|
dev->v4l2_dev.ctrl_handler = hdl;
|
|
spin_lock_init(&dev->spinlock);
|
mutex_init(&dev->lock);
|
init_waitqueue_head(&dev->wait_frame);
|
dev->first_init = 1; /* webcam LED management */
|
|
dev->udev = udev;
|
dev->interface = interface;
|
usb_get_intf(interface);
|
|
if (hflip != -1)
|
dev->vsettings.hflip = hflip;
|
else if (dmi_check_system(stk_upside_down_dmi_table))
|
dev->vsettings.hflip = 1;
|
else
|
dev->vsettings.hflip = 0;
|
if (vflip != -1)
|
dev->vsettings.vflip = vflip;
|
else if (dmi_check_system(stk_upside_down_dmi_table))
|
dev->vsettings.vflip = 1;
|
else
|
dev->vsettings.vflip = 0;
|
dev->n_sbufs = 0;
|
set_present(dev);
|
|
/* Set up the endpoint information
|
* use only the first isoc-in endpoint
|
* for the current alternate setting */
|
iface_desc = interface->cur_altsetting;
|
|
for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
|
endpoint = &iface_desc->endpoint[i].desc;
|
|
if (!dev->isoc_ep
|
&& usb_endpoint_is_isoc_in(endpoint)) {
|
/* we found an isoc in endpoint */
|
dev->isoc_ep = usb_endpoint_num(endpoint);
|
break;
|
}
|
}
|
if (!dev->isoc_ep) {
|
pr_err("Could not find isoc-in endpoint\n");
|
err = -ENODEV;
|
goto error_put;
|
}
|
dev->vsettings.palette = V4L2_PIX_FMT_RGB565;
|
dev->vsettings.mode = MODE_VGA;
|
dev->frame_size = 640 * 480 * 2;
|
|
INIT_LIST_HEAD(&dev->sio_avail);
|
INIT_LIST_HEAD(&dev->sio_full);
|
|
usb_set_intfdata(interface, dev);
|
|
err = stk_register_video_device(dev);
|
if (err)
|
goto error_put;
|
|
return 0;
|
|
error_put:
|
usb_put_intf(interface);
|
error:
|
v4l2_ctrl_handler_free(hdl);
|
v4l2_device_unregister(&dev->v4l2_dev);
|
kfree(dev);
|
return err;
|
}
|
|
static void stk_camera_disconnect(struct usb_interface *interface)
|
{
|
struct stk_camera *dev = usb_get_intfdata(interface);
|
|
usb_set_intfdata(interface, NULL);
|
unset_present(dev);
|
|
wake_up_interruptible(&dev->wait_frame);
|
|
pr_info("Syntek USB2.0 Camera release resources device %s\n",
|
video_device_node_name(&dev->vdev));
|
|
video_unregister_device(&dev->vdev);
|
v4l2_ctrl_handler_free(&dev->hdl);
|
v4l2_device_unregister(&dev->v4l2_dev);
|
kfree(dev);
|
}
|
|
#ifdef CONFIG_PM
|
static int stk_camera_suspend(struct usb_interface *intf, pm_message_t message)
|
{
|
struct stk_camera *dev = usb_get_intfdata(intf);
|
if (is_streaming(dev)) {
|
stk_stop_stream(dev);
|
/* yes, this is ugly */
|
set_streaming(dev);
|
}
|
return 0;
|
}
|
|
static int stk_camera_resume(struct usb_interface *intf)
|
{
|
struct stk_camera *dev = usb_get_intfdata(intf);
|
if (!is_initialised(dev))
|
return 0;
|
unset_initialised(dev);
|
stk_initialise(dev);
|
stk_camera_write_reg(dev, 0x0, 0x49);
|
stk_setup_format(dev);
|
if (is_streaming(dev))
|
stk_start_stream(dev);
|
return 0;
|
}
|
#endif
|
|
static struct usb_driver stk_camera_driver = {
|
.name = "stkwebcam",
|
.probe = stk_camera_probe,
|
.disconnect = stk_camera_disconnect,
|
.id_table = stkwebcam_table,
|
#ifdef CONFIG_PM
|
.suspend = stk_camera_suspend,
|
.resume = stk_camera_resume,
|
#endif
|
};
|
|
module_usb_driver(stk_camera_driver);
|
