+++ /dev/null
-/***************************************************************************
- * V4L2 driver for ET61X[12]51 PC Camera Controllers *
- * *
- * Copyright (C) 2006-2007 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. *
- ***************************************************************************/
-
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-
-#include <linux/version.h>
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/kernel.h>
-#include <linux/param.h>
-#include <linux/errno.h>
-#include <linux/slab.h>
-#include <linux/device.h>
-#include <linux/fs.h>
-#include <linux/delay.h>
-#include <linux/compiler.h>
-#include <linux/ioctl.h>
-#include <linux/poll.h>
-#include <linux/stat.h>
-#include <linux/mm.h>
-#include <linux/vmalloc.h>
-#include <linux/page-flags.h>
-#include <media/v4l2-ioctl.h>
-#include <asm/byteorder.h>
-#include <asm/page.h>
-#include <asm/uaccess.h>
-
-#include "et61x251.h"
-
-/*****************************************************************************/
-
-#define ET61X251_MODULE_NAME "V4L2 driver for ET61X[12]51 " \
- "PC Camera Controllers"
-#define ET61X251_MODULE_AUTHOR "(C) 2006-2007 Luca Risolia"
-#define ET61X251_AUTHOR_EMAIL "<luca.risolia@studio.unibo.it>"
-#define ET61X251_MODULE_LICENSE "GPL"
-#define ET61X251_MODULE_VERSION "1.1.10"
-
-/*****************************************************************************/
-
-MODULE_DEVICE_TABLE(usb, et61x251_id_table);
-
-MODULE_AUTHOR(ET61X251_MODULE_AUTHOR " " ET61X251_AUTHOR_EMAIL);
-MODULE_DESCRIPTION(ET61X251_MODULE_NAME);
-MODULE_VERSION(ET61X251_MODULE_VERSION);
-MODULE_LICENSE(ET61X251_MODULE_LICENSE);
-
-static short video_nr[] = {[0 ... ET61X251_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(ET61X251_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 bool force_munmap[] = {[0 ... ET61X251_MAX_DEVICES-1] =
- ET61X251_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(ET61X251_FORCE_MUNMAP)"."
- "\n");
-
-static unsigned int frame_timeout[] = {[0 ... ET61X251_MAX_DEVICES-1] =
- ET61X251_FRAME_TIMEOUT};
-module_param_array(frame_timeout, uint, NULL, 0644);
-MODULE_PARM_DESC(frame_timeout,
- "\n<n[,...]> Timeout for a video frame in seconds."
- "\nThis parameter is specific for each detected camera."
- "\nDefault value is "
- __MODULE_STRING(ET61X251_FRAME_TIMEOUT)"."
- "\n");
-
-#ifdef ET61X251_DEBUG
-static unsigned short debug = ET61X251_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(ET61X251_DEBUG_LEVEL)"."
- "\n");
-#endif
-
-/*****************************************************************************/
-
-static u32
-et61x251_request_buffers(struct et61x251_device* cam, u32 count,
- enum et61x251_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 > ET61X251_MAX_FRAMES)
- count = ET61X251_MAX_FRAMES;
-
- cam->nbuffers = count;
- while (cam->nbuffers > 0) {
- if ((buff = vmalloc_32_user(cam->nbuffers *
- PAGE_ALIGN(imagesize))))
- break;
- cam->nbuffers--;
- }
-
- for (i = 0; i < cam->nbuffers; i++) {
- cam->frame[i].bufmem = buff + i*PAGE_ALIGN(imagesize);
- cam->frame[i].buf.index = i;
- cam->frame[i].buf.m.offset = i*PAGE_ALIGN(imagesize);
- cam->frame[i].buf.length = imagesize;
- cam->frame[i].buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
- cam->frame[i].buf.sequence = 0;
- cam->frame[i].buf.field = V4L2_FIELD_NONE;
- cam->frame[i].buf.memory = V4L2_MEMORY_MMAP;
- cam->frame[i].buf.flags = 0;
- }
-
- return cam->nbuffers;
-}
-
-
-static void et61x251_release_buffers(struct et61x251_device* cam)
-{
- if (cam->nbuffers) {
- vfree(cam->frame[0].bufmem);
- cam->nbuffers = 0;
- }
- cam->frame_current = NULL;
-}
-
-
-static void et61x251_empty_framequeues(struct et61x251_device* cam)
-{
- u32 i;
-
- INIT_LIST_HEAD(&cam->inqueue);
- INIT_LIST_HEAD(&cam->outqueue);
-
- for (i = 0; i < ET61X251_MAX_FRAMES; i++) {
- cam->frame[i].state = F_UNUSED;
- cam->frame[i].buf.bytesused = 0;
- }
-}
-
-
-static void et61x251_requeue_outqueue(struct et61x251_device* cam)
-{
- struct et61x251_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 et61x251_queue_unusedframes(struct et61x251_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 et61x251_write_reg(struct et61x251_device* cam, u8 value, u16 index)
-{
- struct usb_device* udev = cam->usbdev;
- u8* buff = cam->control_buffer;
- int res;
-
- *buff = value;
-
- res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x00, 0x41,
- 0, index, buff, 1, ET61X251_CTRL_TIMEOUT);
- if (res < 0) {
- DBG(3, "Failed to write a register (value 0x%02X, index "
- "0x%02X, error %d)", value, index, res);
- return -1;
- }
-
- return 0;
-}
-
-
-static int et61x251_read_reg(struct et61x251_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), 0x00, 0xc1,
- 0, index, buff, 1, ET61X251_CTRL_TIMEOUT);
- if (res < 0)
- DBG(3, "Failed to read a register (index 0x%02X, error %d)",
- index, res);
-
- return (res >= 0) ? (int)(*buff) : -1;
-}
-
-
-static int
-et61x251_i2c_wait(struct et61x251_device* cam,
- const struct et61x251_sensor* sensor)
-{
- int i, r;
-
- for (i = 1; i <= 8; i++) {
- if (sensor->interface == ET61X251_I2C_3WIRES) {
- r = et61x251_read_reg(cam, 0x8e);
- if (!(r & 0x02) && (r >= 0))
- return 0;
- } else {
- r = et61x251_read_reg(cam, 0x8b);
- if (!(r & 0x01) && (r >= 0))
- return 0;
- }
- if (r < 0)
- return -EIO;
- udelay(8*8); /* minimum for sensors at 400kHz */
- }
-
- return -EBUSY;
-}
-
-
-int
-et61x251_i2c_raw_write(struct et61x251_device* cam, u8 n, u8 data1, u8 data2,
- u8 data3, u8 data4, u8 data5, u8 data6, u8 data7,
- u8 data8, u8 address)
-{
- struct usb_device* udev = cam->usbdev;
- u8* data = cam->control_buffer;
- int err = 0, res;
-
- data[0] = data2;
- data[1] = data3;
- data[2] = data4;
- data[3] = data5;
- data[4] = data6;
- data[5] = data7;
- data[6] = data8;
- res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x00, 0x41,
- 0, 0x81, data, n-1, ET61X251_CTRL_TIMEOUT);
- if (res < 0)
- err += res;
-
- data[0] = address;
- data[1] = cam->sensor.i2c_slave_id;
- data[2] = cam->sensor.rsta | 0x02 | (n << 4);
- res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x00, 0x41,
- 0, 0x88, data, 3, ET61X251_CTRL_TIMEOUT);
- if (res < 0)
- err += res;
-
- /* Start writing through the serial interface */
- data[0] = data1;
- res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x00, 0x41,
- 0, 0x80, data, 1, ET61X251_CTRL_TIMEOUT);
- if (res < 0)
- err += res;
-
- err += et61x251_i2c_wait(cam, &cam->sensor);
-
- if (err)
- DBG(3, "I2C raw write failed for %s image sensor",
- cam->sensor.name);
-
- PDBGG("I2C raw write: %u bytes, address = 0x%02X, data1 = 0x%02X, "
- "data2 = 0x%02X, data3 = 0x%02X, data4 = 0x%02X, data5 = 0x%02X,"
- " data6 = 0x%02X, data7 = 0x%02X, data8 = 0x%02X", n, address,
- data1, data2, data3, data4, data5, data6, data7, data8);
-
- return err ? -1 : 0;
-
-}
-
-
-/*****************************************************************************/
-
-static void et61x251_urb_complete(struct urb *urb)
-{
- struct et61x251_device* cam = urb->context;
- struct et61x251_frame_t** f;
- size_t imagesize;
- u8 i;
- int err = 0;
-
- if (urb->status == -ENOENT)
- return;
-
- f = &cam->frame_current;
-
- if (cam->stream == STREAM_INTERRUPT) {
- cam->stream = STREAM_OFF;
- if ((*f))
- (*f)->state = F_QUEUED;
- DBG(3, "Stream interrupted");
- wake_up(&cam->wait_stream);
- }
-
- if (cam->state & DEV_DISCONNECTED)
- return;
-
- if (cam->state & DEV_MISCONFIGURED) {
- wake_up_interruptible(&cam->wait_frame);
- return;
- }
-
- if (cam->stream == STREAM_OFF || list_empty(&cam->inqueue))
- goto resubmit_urb;
-
- if (!(*f))
- (*f) = list_entry(cam->inqueue.next, struct et61x251_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;
- u8* b1, * b2, sof;
- const u8 VOID_BYTES = 6;
- size_t imglen;
-
- 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;
- }
-
- b1 = pos++;
- b2 = pos++;
- sof = ((*b1 & 0x3f) == 63);
- imglen = ((*b1 & 0xc0) << 2) | *b2;
-
- PDBGG("Isochrnous frame: length %u, #%u i, image length %zu",
- len, i, imglen);
-
- 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);
- pos += 22;
- DBG(3, "SOF detected: new video frame");
- }
-
- if ((*f)->state == F_GRABBING) {
- if (sof && (*f)->buf.bytesused) {
- if (cam->sensor.pix_format.pixelformat ==
- V4L2_PIX_FMT_ET61X251)
- goto end_of_frame;
- else {
- DBG(3, "Not expected SOF detected "
- "after %lu bytes",
- (unsigned long)(*f)->buf.bytesused);
- (*f)->state = F_ERROR;
- continue;
- }
- }
-
- if ((*f)->buf.bytesused + imglen > imagesize) {
- DBG(3, "Video frame size exceeded");
- (*f)->state = F_ERROR;
- continue;
- }
-
- pos += VOID_BYTES;
-
- memcpy((*f)->bufmem+(*f)->buf.bytesused, pos, imglen);
- (*f)->buf.bytesused += imglen;
-
- 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 et61x251_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 &&
- cam->sensor.pix_format.pixelformat ==
- V4L2_PIX_FMT_ET61X251)
- 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 et61x251_start_transfer(struct et61x251_device* cam)
-{
- struct usb_device *udev = cam->usbdev;
- struct urb* urb;
- struct usb_host_interface* altsetting = usb_altnum_to_altsetting(
- usb_ifnum_to_if(udev, 0),
- ET61X251_ALTERNATE_SETTING);
- const unsigned int psz = le16_to_cpu(altsetting->
- endpoint[0].desc.wMaxPacketSize);
- s8 i, j;
- int err = 0;
-
- for (i = 0; i < ET61X251_URBS; i++) {
- cam->transfer_buffer[i] = kzalloc(ET61X251_ISO_PACKETS * psz,
- GFP_KERNEL);
- if (!cam->transfer_buffer[i]) {
- err = -ENOMEM;
- DBG(1, "Not enough memory");
- goto free_buffers;
- }
- }
-
- for (i = 0; i < ET61X251_URBS; i++) {
- urb = usb_alloc_urb(ET61X251_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 = ET61X251_ISO_PACKETS;
- urb->complete = et61x251_urb_complete;
- urb->transfer_buffer = cam->transfer_buffer[i];
- urb->transfer_buffer_length = psz * ET61X251_ISO_PACKETS;
- urb->interval = 1;
- for (j = 0; j < ET61X251_ISO_PACKETS; j++) {
- urb->iso_frame_desc[j].offset = psz * j;
- urb->iso_frame_desc[j].length = psz;
- }
- }
-
- err = et61x251_write_reg(cam, 0x01, 0x03);
- err = et61x251_write_reg(cam, 0x00, 0x03);
- err = et61x251_write_reg(cam, 0x08, 0x03);
- if (err) {
- err = -EIO;
- DBG(1, "I/O hardware error");
- goto free_urbs;
- }
-
- err = usb_set_interface(udev, 0, ET61X251_ALTERNATE_SETTING);
- if (err) {
- DBG(1, "usb_set_interface() failed");
- goto free_urbs;
- }
-
- cam->frame_current = NULL;
-
- for (i = 0; i < ET61X251_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 < ET61X251_URBS) && cam->urb[i]; i++)
- usb_free_urb(cam->urb[i]);
-
-free_buffers:
- for (i = 0; (i < ET61X251_URBS) && cam->transfer_buffer[i]; i++)
- kfree(cam->transfer_buffer[i]);
-
- return err;
-}
-
-
-static int et61x251_stop_transfer(struct et61x251_device* cam)
-{
- struct usb_device *udev = cam->usbdev;
- s8 i;
- int err = 0;
-
- if (cam->state & DEV_DISCONNECTED)
- return 0;
-
- for (i = ET61X251_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 et61x251_stream_interrupt(struct et61x251_device* cam)
-{
- long timeout;
-
- cam->stream = STREAM_INTERRUPT;
- timeout = wait_event_timeout(cam->wait_stream,
- (cam->stream == STREAM_OFF) ||
- (cam->state & DEV_DISCONNECTED),
- ET61X251_URB_TIMEOUT);
- if (cam->state & DEV_DISCONNECTED)
- return -ENODEV;
- else if (cam->stream != STREAM_OFF) {
- cam->state |= DEV_MISCONFIGURED;
- DBG(1, "URB timeout reached. The camera is misconfigured. To "
- "use it, close and open %s again.",
- video_device_node_name(cam->v4ldev));
- return -EIO;
- }
-
- return 0;
-}
-
-/*****************************************************************************/
-
-#ifdef CONFIG_VIDEO_ADV_DEBUG
-
-static int et61x251_i2c_try_read(struct et61x251_device* cam,
- const struct et61x251_sensor* sensor,
- u8 address)
-{
- struct usb_device* udev = cam->usbdev;
- u8* data = cam->control_buffer;
- int err = 0, res;
-
- data[0] = address;
- data[1] = cam->sensor.i2c_slave_id;
- data[2] = cam->sensor.rsta | 0x10;
- data[3] = !(et61x251_read_reg(cam, 0x8b) & 0x02);
- res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x00, 0x41,
- 0, 0x88, data, 4, ET61X251_CTRL_TIMEOUT);
- if (res < 0)
- err += res;
-
- err += et61x251_i2c_wait(cam, sensor);
-
- res = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), 0x00, 0xc1,
- 0, 0x80, data, 8, ET61X251_CTRL_TIMEOUT);
- if (res < 0)
- err += res;
-
- if (err)
- DBG(3, "I2C read failed for %s image sensor", sensor->name);
-
- PDBGG("I2C read: address 0x%02X, value: 0x%02X", address, data[0]);
-
- return err ? -1 : (int)data[0];
-}
-
-
-static int et61x251_i2c_try_write(struct et61x251_device* cam,
- const struct et61x251_sensor* sensor,
- u8 address, u8 value)
-{
- struct usb_device* udev = cam->usbdev;
- u8* data = cam->control_buffer;
- int err = 0, res;
-
- data[0] = address;
- data[1] = cam->sensor.i2c_slave_id;
- data[2] = cam->sensor.rsta | 0x12;
- res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x00, 0x41,
- 0, 0x88, data, 3, ET61X251_CTRL_TIMEOUT);
- if (res < 0)
- err += res;
-
- data[0] = value;
- res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x00, 0x41,
- 0, 0x80, data, 1, ET61X251_CTRL_TIMEOUT);
- if (res < 0)
- err += res;
-
- err += et61x251_i2c_wait(cam, sensor);
-
- if (err)
- DBG(3, "I2C write failed for %s image sensor", sensor->name);
-
- PDBGG("I2C write: address 0x%02X, value: 0x%02X", address, value);
-
- return err ? -1 : 0;
-}
-
-static int et61x251_i2c_read(struct et61x251_device* cam, u8 address)
-{
- return et61x251_i2c_try_read(cam, &cam->sensor, address);
-}
-
-static int et61x251_i2c_write(struct et61x251_device* cam,
- u8 address, u8 value)
-{
- return et61x251_i2c_try_write(cam, &cam->sensor, address, value);
-}
-
-static u8 et61x251_strtou8(const char* buff, size_t len, ssize_t* count)
-{
- char str[5];
- char* endp;
- unsigned long val;
-
- if (len < 4) {
- strncpy(str, buff, len);
- str[len] = '\0';
- } else {
- strncpy(str, buff, 4);
- str[4] = '\0';
- }
-
- val = simple_strtoul(str, &endp, 0);
-
- *count = 0;
- if (val <= 0xff)
- *count = (ssize_t)(endp - str);
- if ((*count) && (len == *count+1) && (buff[*count] == '\n'))
- *count += 1;
-
- return (u8)val;
-}
-
-/*
- NOTE 1: being inside one of the following methods implies that the v4l
- device exists for sure (see kobjects and reference counters)
- NOTE 2: buffers are PAGE_SIZE long
-*/
-
-static ssize_t et61x251_show_reg(struct device* cd,
- struct device_attribute *attr, char* buf)
-{
- struct et61x251_device* cam;
- ssize_t count;
-
- if (mutex_lock_interruptible(&et61x251_sysfs_lock))
- return -ERESTARTSYS;
-
- cam = video_get_drvdata(to_video_device(cd));
- if (!cam) {
- mutex_unlock(&et61x251_sysfs_lock);
- return -ENODEV;
- }
-
- count = sprintf(buf, "%u\n", cam->sysfs.reg);
-
- mutex_unlock(&et61x251_sysfs_lock);
-
- return count;
-}
-
-
-static ssize_t
-et61x251_store_reg(struct device* cd,
- struct device_attribute *attr, const char* buf, size_t len)
-{
- struct et61x251_device* cam;
- u8 index;
- ssize_t count;
-
- if (mutex_lock_interruptible(&et61x251_sysfs_lock))
- return -ERESTARTSYS;
-
- cam = video_get_drvdata(to_video_device(cd));
- if (!cam) {
- mutex_unlock(&et61x251_sysfs_lock);
- return -ENODEV;
- }
-
- index = et61x251_strtou8(buf, len, &count);
- if (index > 0x8e || !count) {
- mutex_unlock(&et61x251_sysfs_lock);
- return -EINVAL;
- }
-
- cam->sysfs.reg = index;
-
- DBG(2, "Moved ET61X[12]51 register index to 0x%02X", cam->sysfs.reg);
- DBG(3, "Written bytes: %zd", count);
-
- mutex_unlock(&et61x251_sysfs_lock);
-
- return count;
-}
-
-
-static ssize_t et61x251_show_val(struct device* cd,
- struct device_attribute *attr, char* buf)
-{
- struct et61x251_device* cam;
- ssize_t count;
- int val;
-
- if (mutex_lock_interruptible(&et61x251_sysfs_lock))
- return -ERESTARTSYS;
-
- cam = video_get_drvdata(to_video_device(cd));
- if (!cam) {
- mutex_unlock(&et61x251_sysfs_lock);
- return -ENODEV;
- }
-
- if ((val = et61x251_read_reg(cam, cam->sysfs.reg)) < 0) {
- mutex_unlock(&et61x251_sysfs_lock);
- return -EIO;
- }
-
- count = sprintf(buf, "%d\n", val);
-
- DBG(3, "Read bytes: %zd", count);
-
- mutex_unlock(&et61x251_sysfs_lock);
-
- return count;
-}
-
-
-static ssize_t
-et61x251_store_val(struct device* cd, struct device_attribute *attr,
- const char* buf, size_t len)
-{
- struct et61x251_device* cam;
- u8 value;
- ssize_t count;
- int err;
-
- if (mutex_lock_interruptible(&et61x251_sysfs_lock))
- return -ERESTARTSYS;
-
- cam = video_get_drvdata(to_video_device(cd));
- if (!cam) {
- mutex_unlock(&et61x251_sysfs_lock);
- return -ENODEV;
- }
-
- value = et61x251_strtou8(buf, len, &count);
- if (!count) {
- mutex_unlock(&et61x251_sysfs_lock);
- return -EINVAL;
- }
-
- err = et61x251_write_reg(cam, value, cam->sysfs.reg);
- if (err) {
- mutex_unlock(&et61x251_sysfs_lock);
- return -EIO;
- }
-
- DBG(2, "Written ET61X[12]51 reg. 0x%02X, val. 0x%02X",
- cam->sysfs.reg, value);
- DBG(3, "Written bytes: %zd", count);
-
- mutex_unlock(&et61x251_sysfs_lock);
-
- return count;
-}
-
-
-static ssize_t et61x251_show_i2c_reg(struct device* cd,
- struct device_attribute *attr, char* buf)
-{
- struct et61x251_device* cam;
- ssize_t count;
-
- if (mutex_lock_interruptible(&et61x251_sysfs_lock))
- return -ERESTARTSYS;
-
- cam = video_get_drvdata(to_video_device(cd));
- if (!cam) {
- mutex_unlock(&et61x251_sysfs_lock);
- return -ENODEV;
- }
-
- count = sprintf(buf, "%u\n", cam->sysfs.i2c_reg);
-
- DBG(3, "Read bytes: %zd", count);
-
- mutex_unlock(&et61x251_sysfs_lock);
-
- return count;
-}
-
-
-static ssize_t
-et61x251_store_i2c_reg(struct device* cd, struct device_attribute *attr,
- const char* buf, size_t len)
-{
- struct et61x251_device* cam;
- u8 index;
- ssize_t count;
-
- if (mutex_lock_interruptible(&et61x251_sysfs_lock))
- return -ERESTARTSYS;
-
- cam = video_get_drvdata(to_video_device(cd));
- if (!cam) {
- mutex_unlock(&et61x251_sysfs_lock);
- return -ENODEV;
- }
-
- index = et61x251_strtou8(buf, len, &count);
- if (!count) {
- mutex_unlock(&et61x251_sysfs_lock);
- return -EINVAL;
- }
-
- cam->sysfs.i2c_reg = index;
-
- DBG(2, "Moved sensor register index to 0x%02X", cam->sysfs.i2c_reg);
- DBG(3, "Written bytes: %zd", count);
-
- mutex_unlock(&et61x251_sysfs_lock);
-
- return count;
-}
-
-
-static ssize_t et61x251_show_i2c_val(struct device* cd,
- struct device_attribute *attr, char* buf)
-{
- struct et61x251_device* cam;
- ssize_t count;
- int val;
-
- if (mutex_lock_interruptible(&et61x251_sysfs_lock))
- return -ERESTARTSYS;
-
- cam = video_get_drvdata(to_video_device(cd));
- if (!cam) {
- mutex_unlock(&et61x251_sysfs_lock);
- return -ENODEV;
- }
-
- if (!(cam->sensor.sysfs_ops & ET61X251_I2C_READ)) {
- mutex_unlock(&et61x251_sysfs_lock);
- return -ENOSYS;
- }
-
- if ((val = et61x251_i2c_read(cam, cam->sysfs.i2c_reg)) < 0) {
- mutex_unlock(&et61x251_sysfs_lock);
- return -EIO;
- }
-
- count = sprintf(buf, "%d\n", val);
-
- DBG(3, "Read bytes: %zd", count);
-
- mutex_unlock(&et61x251_sysfs_lock);
-
- return count;
-}
-
-
-static ssize_t
-et61x251_store_i2c_val(struct device* cd, struct device_attribute *attr,
- const char* buf, size_t len)
-{
- struct et61x251_device* cam;
- u8 value;
- ssize_t count;
- int err;
-
- if (mutex_lock_interruptible(&et61x251_sysfs_lock))
- return -ERESTARTSYS;
-
- cam = video_get_drvdata(to_video_device(cd));
- if (!cam) {
- mutex_unlock(&et61x251_sysfs_lock);
- return -ENODEV;
- }
-
- if (!(cam->sensor.sysfs_ops & ET61X251_I2C_READ)) {
- mutex_unlock(&et61x251_sysfs_lock);
- return -ENOSYS;
- }
-
- value = et61x251_strtou8(buf, len, &count);
- if (!count) {
- mutex_unlock(&et61x251_sysfs_lock);
- return -EINVAL;
- }
-
- err = et61x251_i2c_write(cam, cam->sysfs.i2c_reg, value);
- if (err) {
- mutex_unlock(&et61x251_sysfs_lock);
- return -EIO;
- }
-
- DBG(2, "Written sensor reg. 0x%02X, val. 0x%02X",
- cam->sysfs.i2c_reg, value);
- DBG(3, "Written bytes: %zd", count);
-
- mutex_unlock(&et61x251_sysfs_lock);
-
- return count;
-}
-
-
-static DEVICE_ATTR(reg, S_IRUGO | S_IWUSR,
- et61x251_show_reg, et61x251_store_reg);
-static DEVICE_ATTR(val, S_IRUGO | S_IWUSR,
- et61x251_show_val, et61x251_store_val);
-static DEVICE_ATTR(i2c_reg, S_IRUGO | S_IWUSR,
- et61x251_show_i2c_reg, et61x251_store_i2c_reg);
-static DEVICE_ATTR(i2c_val, S_IRUGO | S_IWUSR,
- et61x251_show_i2c_val, et61x251_store_i2c_val);
-
-
-static int et61x251_create_sysfs(struct et61x251_device* cam)
-{
- struct device *classdev = &(cam->v4ldev->dev);
- int err = 0;
-
- if ((err = device_create_file(classdev, &dev_attr_reg)))
- goto err_out;
- if ((err = device_create_file(classdev, &dev_attr_val)))
- goto err_reg;
-
- if (cam->sensor.sysfs_ops) {
- if ((err = device_create_file(classdev, &dev_attr_i2c_reg)))
- goto err_val;
- if ((err = device_create_file(classdev, &dev_attr_i2c_val)))
- goto err_i2c_reg;
- }
-
-err_i2c_reg:
- if (cam->sensor.sysfs_ops)
- device_remove_file(classdev, &dev_attr_i2c_reg);
-err_val:
- device_remove_file(classdev, &dev_attr_val);
-err_reg:
- device_remove_file(classdev, &dev_attr_reg);
-err_out:
- return err;
-}
-#endif /* CONFIG_VIDEO_ADV_DEBUG */
-
-/*****************************************************************************/
-
-static int
-et61x251_set_pix_format(struct et61x251_device* cam,
- struct v4l2_pix_format* pix)
-{
- int r, err = 0;
-
- if ((r = et61x251_read_reg(cam, 0x12)) < 0)
- err += r;
- if (pix->pixelformat == V4L2_PIX_FMT_ET61X251)
- err += et61x251_write_reg(cam, r & 0xfd, 0x12);
- else
- err += et61x251_write_reg(cam, r | 0x02, 0x12);
-
- return err ? -EIO : 0;
-}
-
-
-static int
-et61x251_set_compression(struct et61x251_device* cam,
- struct v4l2_jpegcompression* compression)
-{
- int r, err = 0;
-
- if ((r = et61x251_read_reg(cam, 0x12)) < 0)
- err += r;
- if (compression->quality == 0)
- err += et61x251_write_reg(cam, r & 0xfb, 0x12);
- else
- err += et61x251_write_reg(cam, r | 0x04, 0x12);
-
- return err ? -EIO : 0;
-}
-
-
-static int et61x251_set_scale(struct et61x251_device* cam, u8 scale)
-{
- int r = 0, err = 0;
-
- r = et61x251_read_reg(cam, 0x12);
- if (r < 0)
- err += r;
-
- if (scale == 1)
- err += et61x251_write_reg(cam, r & ~0x01, 0x12);
- else if (scale == 2)
- err += et61x251_write_reg(cam, r | 0x01, 0x12);
-
- if (err)
- return -EIO;
-
- PDBGG("Scaling factor: %u", scale);
-
- return 0;
-}
-
-
-static int
-et61x251_set_crop(struct et61x251_device* cam, struct v4l2_rect* rect)
-{
- struct et61x251_sensor* s = &cam->sensor;
- u16 fmw_sx = (u16)(rect->left - s->cropcap.bounds.left +
- s->active_pixel.left),
- fmw_sy = (u16)(rect->top - s->cropcap.bounds.top +
- s->active_pixel.top),
- fmw_length = (u16)(rect->width),
- fmw_height = (u16)(rect->height);
- int err = 0;
-
- err += et61x251_write_reg(cam, fmw_sx & 0xff, 0x69);
- err += et61x251_write_reg(cam, fmw_sy & 0xff, 0x6a);
- err += et61x251_write_reg(cam, fmw_length & 0xff, 0x6b);
- err += et61x251_write_reg(cam, fmw_height & 0xff, 0x6c);
- err += et61x251_write_reg(cam, (fmw_sx >> 8) | ((fmw_sy & 0x300) >> 6)
- | ((fmw_length & 0x300) >> 4)
- | ((fmw_height & 0x300) >> 2), 0x6d);
- if (err)
- return -EIO;
-
- PDBGG("fmw_sx, fmw_sy, fmw_length, fmw_height: %u %u %u %u",
- fmw_sx, fmw_sy, fmw_length, fmw_height);
-
- return 0;
-}
-
-
-static int et61x251_init(struct et61x251_device* cam)
-{
- struct et61x251_sensor* s = &cam->sensor;
- struct v4l2_control ctrl;
- struct v4l2_queryctrl *qctrl;
- struct v4l2_rect* rect;
- u8 i = 0;
- int err = 0;
-
- if (!(cam->state & DEV_INITIALIZED)) {
- mutex_init(&cam->open_mutex);
- init_waitqueue_head(&cam->wait_open);
- qctrl = s->qctrl;
- rect = &(s->cropcap.defrect);
- cam->compression.quality = ET61X251_COMPRESSION_QUALITY;
- } else { /* use current values */
- qctrl = s->_qctrl;
- rect = &(s->_rect);
- }
-
- err += et61x251_set_scale(cam, rect->width / s->pix_format.width);
- err += et61x251_set_crop(cam, rect);
- if (err)
- return err;
-
- if (s->init) {
- err = s->init(cam);
- if (err) {
- DBG(3, "Sensor initialization failed");
- return err;
- }
- }
-
- err += et61x251_set_compression(cam, &cam->compression);
- err += et61x251_set_pix_format(cam, &s->pix_format);
- if (s->set_pix_format)
- err += s->set_pix_format(cam, &s->pix_format);
- if (err)
- return err;
-
- if (s->pix_format.pixelformat == V4L2_PIX_FMT_ET61X251)
- DBG(3, "Compressed video format is active, quality %d",
- cam->compression.quality);
- else
- DBG(3, "Uncompressed video format is active");
-
- 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 et61x251_release_resources(struct kref *kref)
-{
- struct et61x251_device *cam;
-
- mutex_lock(&et61x251_sysfs_lock);
-
- cam = container_of(kref, struct et61x251_device, kref);
-
- DBG(2, "V4L2 device %s deregistered",
- video_device_node_name(cam->v4ldev));
- video_set_drvdata(cam->v4ldev, NULL);
- video_unregister_device(cam->v4ldev);
- usb_put_dev(cam->usbdev);
- kfree(cam->control_buffer);
- kfree(cam);
-
- mutex_unlock(&et61x251_sysfs_lock);
-}
-
-
-static int et61x251_open(struct file *filp)
-{
- struct et61x251_device* cam;
- int err = 0;
-
- if (!down_read_trylock(&et61x251_dev_lock))
- return -ERESTARTSYS;
-
- cam = video_drvdata(filp);
-
- if (wait_for_completion_interruptible(&cam->probe)) {
- up_read(&et61x251_dev_lock);
- return -ERESTARTSYS;
- }
-
- kref_get(&cam->kref);
-
- if (mutex_lock_interruptible(&cam->open_mutex)) {
- kref_put(&cam->kref, et61x251_release_resources);
- up_read(&et61x251_dev_lock);
- return -ERESTARTSYS;
- }
-
- if (cam->state & DEV_DISCONNECTED) {
- DBG(1, "Device not present");
- err = -ENODEV;
- goto out;
- }
-
- if (cam->users) {
- DBG(2, "Device %s is already in use",
- video_device_node_name(cam->v4ldev));
- DBG(3, "Simultaneous opens are not supported");
- if ((filp->f_flags & O_NONBLOCK) ||
- (filp->f_flags & O_NDELAY)) {
- err = -EWOULDBLOCK;
- goto out;
- }
- DBG(2, "A blocking open() has been requested. Wait for the "
- "device to be released...");
- up_read(&et61x251_dev_lock);
- err = wait_event_interruptible_exclusive(cam->wait_open,
- (cam->state & DEV_DISCONNECTED)
- || !cam->users);
- down_read(&et61x251_dev_lock);
- if (err)
- goto out;
- if (cam->state & DEV_DISCONNECTED) {
- err = -ENODEV;
- goto out;
- }
- }
-
- if (cam->state & DEV_MISCONFIGURED) {
- err = et61x251_init(cam);
- if (err) {
- DBG(1, "Initialization failed again. "
- "I will retry on next open().");
- goto out;
- }
- cam->state &= ~DEV_MISCONFIGURED;
- }
-
- if ((err = et61x251_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;
- et61x251_empty_framequeues(cam);
-
- DBG(3, "Video device %s is open",
- video_device_node_name(cam->v4ldev));
-
-out:
- mutex_unlock(&cam->open_mutex);
- if (err)
- kref_put(&cam->kref, et61x251_release_resources);
- up_read(&et61x251_dev_lock);
- return err;
-}
-
-
-static int et61x251_release(struct file *filp)
-{
- struct et61x251_device* cam;
-
- down_write(&et61x251_dev_lock);
-
- cam = video_drvdata(filp);
-
- et61x251_stop_transfer(cam);
- et61x251_release_buffers(cam);
- cam->users--;
- wake_up_interruptible_nr(&cam->wait_open, 1);
-
- DBG(3, "Video device %s closed",
- video_device_node_name(cam->v4ldev));
-
- kref_put(&cam->kref, et61x251_release_resources);
-
- up_write(&et61x251_dev_lock);
-
- return 0;
-}
-
-
-static ssize_t
-et61x251_read(struct file* filp, char __user * buf,
- size_t count, loff_t* f_pos)
-{
- struct et61x251_device *cam = video_drvdata(filp);
- struct et61x251_frame_t* f, * i;
- unsigned long lock_flags;
- long timeout;
- int err = 0;
-
- if (mutex_lock_interruptible(&cam->fileop_mutex))
- return -ERESTARTSYS;
-
- if (cam->state & DEV_DISCONNECTED) {
- DBG(1, "Device not present");
- mutex_unlock(&cam->fileop_mutex);
- return -ENODEV;
- }
-
- if (cam->state & DEV_MISCONFIGURED) {
- DBG(1, "The camera is misconfigured. Close and open it "
- "again.");
- mutex_unlock(&cam->fileop_mutex);
- return -EIO;
- }
-
- if (cam->io == IO_MMAP) {
- DBG(3, "Close and open the device again to choose the read "
- "method");
- mutex_unlock(&cam->fileop_mutex);
- return -EBUSY;
- }
-
- if (cam->io == IO_NONE) {
- if (!et61x251_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))
- et61x251_empty_framequeues(cam);
- et61x251_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),
- msecs_to_jiffies(
- cam->module_param.frame_timeout * 1000
- )
- );
- 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 et61x251_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);
-
- et61x251_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 et61x251_poll(struct file *filp, poll_table *wait)
-{
- struct et61x251_device *cam = video_drvdata(filp);
- struct et61x251_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 (!et61x251_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);
- et61x251_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 et61x251_vm_open(struct vm_area_struct* vma)
-{
- struct et61x251_frame_t* f = vma->vm_private_data;
- f->vma_use_count++;
-}
-
-
-static void et61x251_vm_close(struct vm_area_struct* vma)
-{
- /* NOTE: buffers are not freed here */
- struct et61x251_frame_t* f = vma->vm_private_data;
- f->vma_use_count--;
-}
-
-
-static const struct vm_operations_struct et61x251_vm_ops = {
- .open = et61x251_vm_open,
- .close = et61x251_vm_close,
-};
-
-
-static int et61x251_mmap(struct file* filp, struct vm_area_struct *vma)
-{
- struct et61x251_device *cam = video_drvdata(filp);
- unsigned long size = vma->vm_end - vma->vm_start,
- start = vma->vm_start;
- void *pos;
- u32 i;
-
- if (mutex_lock_interruptible(&cam->fileop_mutex))
- return -ERESTARTSYS;
-
- if (cam->state & DEV_DISCONNECTED) {
- DBG(1, "Device not present");
- mutex_unlock(&cam->fileop_mutex);
- return -ENODEV;
- }
-
- if (cam->state & DEV_MISCONFIGURED) {
- DBG(1, "The camera is misconfigured. Close and open it "
- "again.");
- mutex_unlock(&cam->fileop_mutex);
- return -EIO;
- }
-
- if (!(vma->vm_flags & (VM_WRITE | VM_READ))) {
- mutex_unlock(&cam->fileop_mutex);
- return -EACCES;
- }
-
- if (cam->io != IO_MMAP ||
- size != PAGE_ALIGN(cam->frame[0].buf.length)) {
- mutex_unlock(&cam->fileop_mutex);
- return -EINVAL;
- }
-
- for (i = 0; i < cam->nbuffers; i++) {
- if ((cam->frame[i].buf.m.offset>>PAGE_SHIFT) == vma->vm_pgoff)
- break;
- }
- if (i == cam->nbuffers) {
- mutex_unlock(&cam->fileop_mutex);
- return -EINVAL;
- }
-
- vma->vm_flags |= VM_IO;
- vma->vm_flags |= VM_RESERVED;
-
- pos = cam->frame[i].bufmem;
- while (size > 0) { /* size is page-aligned */
- if (vm_insert_page(vma, start, vmalloc_to_page(pos))) {
- mutex_unlock(&cam->fileop_mutex);
- return -EAGAIN;
- }
- start += PAGE_SIZE;
- pos += PAGE_SIZE;
- size -= PAGE_SIZE;
- }
-
- vma->vm_ops = &et61x251_vm_ops;
- vma->vm_private_data = &cam->frame[i];
- et61x251_vm_open(vma);
-
- mutex_unlock(&cam->fileop_mutex);
-
- return 0;
-}
-
-/*****************************************************************************/
-
-static int
-et61x251_vidioc_querycap(struct et61x251_device* cam, void __user * arg)
-{
- struct v4l2_capability cap = {
- .driver = "et61x251",
- .version = LINUX_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, dev_name(&cam->usbdev->dev),
- sizeof(cap.bus_info));
-
- if (copy_to_user(arg, &cap, sizeof(cap)))
- return -EFAULT;
-
- return 0;
-}
-
-
-static int
-et61x251_vidioc_enuminput(struct et61x251_device* cam, void __user * arg)
-{
- struct v4l2_input i;
-
- if (copy_from_user(&i, arg, sizeof(i)))
- return -EFAULT;
-
- if (i.index)
- return -EINVAL;
-
- memset(&i, 0, sizeof(i));
- strcpy(i.name, "Camera");
- i.type = V4L2_INPUT_TYPE_CAMERA;
- i.capabilities = V4L2_IN_CAP_STD;
-
- if (copy_to_user(arg, &i, sizeof(i)))
- return -EFAULT;
-
- return 0;
-}
-
-
-static int
-et61x251_vidioc_g_input(struct et61x251_device* cam, void __user * arg)
-{
- int index = 0;
-
- if (copy_to_user(arg, &index, sizeof(index)))
- return -EFAULT;
-
- return 0;
-}
-
-
-static int
-et61x251_vidioc_s_input(struct et61x251_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
-et61x251_vidioc_query_ctrl(struct et61x251_device* cam, void __user * arg)
-{
- struct et61x251_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
-et61x251_vidioc_g_ctrl(struct et61x251_device* cam, void __user * arg)
-{
- struct et61x251_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
-et61x251_vidioc_s_ctrl(struct et61x251_device* cam, void __user * arg)
-{
- struct et61x251_sensor* s = &cam->sensor;
- struct v4l2_control ctrl;
- u8 i;
- int err = 0;
-
- if (!s->set_ctrl)
- return -EINVAL;
-
- if (copy_from_user(&ctrl, arg, sizeof(ctrl)))
- return -EFAULT;
-
- for (i = 0; i < ARRAY_SIZE(s->qctrl); i++) {
- if (ctrl.id == s->qctrl[i].id) {
- if (s->qctrl[i].flags & V4L2_CTRL_FLAG_DISABLED)
- return -EINVAL;
- if (ctrl.value < s->qctrl[i].minimum ||
- ctrl.value > s->qctrl[i].maximum)
- return -ERANGE;
- ctrl.value -= ctrl.value % s->qctrl[i].step;
- break;
- }
- }
- if (i == ARRAY_SIZE(s->qctrl))
- return -EINVAL;
- if ((err = s->set_ctrl(cam, &ctrl)))
- return err;
-
- s->_qctrl[i].default_value = ctrl.value;
-
- return 0;
-}
-
-
-static int
-et61x251_vidioc_cropcap(struct et61x251_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
-et61x251_vidioc_g_crop(struct et61x251_device* cam, void __user * arg)
-{
- struct et61x251_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
-et61x251_vidioc_s_crop(struct et61x251_device* cam, void __user * arg)
-{
- struct et61x251_sensor* s = &cam->sensor;
- struct v4l2_crop crop;
- struct v4l2_rect* rect;
- struct v4l2_rect* bounds = &(s->cropcap.bounds);
- struct v4l2_pix_format* pix_format = &(s->pix_format);
- u8 scale;
- const enum et61x251_stream_state stream = cam->stream;
- const u32 nbuffers = cam->nbuffers;
- u32 i;
- int err = 0;
-
- if (copy_from_user(&crop, arg, sizeof(crop)))
- return -EFAULT;
-
- rect = &(crop.c);
-
- if (crop.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
- return -EINVAL;
-
- if (cam->module_param.force_munmap)
- for (i = 0; i < cam->nbuffers; i++)
- if (cam->frame[i].vma_use_count) {
- DBG(3, "VIDIOC_S_CROP failed. "
- "Unmap the buffers first.");
- return -EBUSY;
- }
-
- /* Preserve R,G or B origin */
- rect->left = (s->_rect.left & 1L) ? rect->left | 1L : rect->left & ~1L;
- rect->top = (s->_rect.top & 1L) ? rect->top | 1L : rect->top & ~1L;
-
- if (rect->width < 16)
- rect->width = 16;
- if (rect->height < 16)
- rect->height = 16;
- 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 &= ~15L;
- rect->height &= ~15L;
-
- if (ET61X251_PRESERVE_IMGSCALE) {
- /* Calculate the actual scaling factor */
- u32 a, b;
- a = rect->width * rect->height;
- b = pix_format->width * pix_format->height;
- scale = b ? (u8)((a / b) < 4 ? 1 : 2) : 1;
- } else
- scale = 1;
-
- if (cam->stream == STREAM_ON)
- if ((err = et61x251_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)
- et61x251_release_buffers(cam);
-
- err = et61x251_set_crop(cam, rect);
- if (s->set_crop)
- err += s->set_crop(cam, rect);
- err += et61x251_set_scale(cam, scale);
-
- 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 %s again.",
- video_device_node_name(cam->v4ldev));
- return -EIO;
- }
-
- s->pix_format.width = rect->width/scale;
- s->pix_format.height = rect->height/scale;
- memcpy(&(s->_rect), rect, sizeof(*rect));
-
- if ((cam->module_param.force_munmap || cam->io == IO_READ) &&
- nbuffers != et61x251_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 %s again.",
- video_device_node_name(cam->v4ldev));
- return -ENOMEM;
- }
-
- if (cam->io == IO_READ)
- et61x251_empty_framequeues(cam);
- else if (cam->module_param.force_munmap)
- et61x251_requeue_outqueue(cam);
-
- cam->stream = stream;
-
- return 0;
-}
-
-
-static int
-et61x251_vidioc_enum_framesizes(struct et61x251_device* cam, void __user * arg)
-{
- struct v4l2_frmsizeenum frmsize;
-
- if (copy_from_user(&frmsize, arg, sizeof(frmsize)))
- return -EFAULT;
-
- if (frmsize.index != 0)
- return -EINVAL;
-
- if (frmsize.pixel_format != V4L2_PIX_FMT_ET61X251 &&
- frmsize.pixel_format != V4L2_PIX_FMT_SBGGR8)
- return -EINVAL;
-
- frmsize.type = V4L2_FRMSIZE_TYPE_STEPWISE;
- frmsize.stepwise.min_width = frmsize.stepwise.step_width = 16;
- frmsize.stepwise.min_height = frmsize.stepwise.step_height = 16;
- frmsize.stepwise.max_width = cam->sensor.cropcap.bounds.width;
- frmsize.stepwise.max_height = cam->sensor.cropcap.bounds.height;
- memset(&frmsize.reserved, 0, sizeof(frmsize.reserved));
-
- if (copy_to_user(arg, &frmsize, sizeof(frmsize)))
- return -EFAULT;
-
- return 0;
-}
-
-
-static int
-et61x251_vidioc_enum_fmt(struct et61x251_device* cam, void __user * arg)
-{
- struct v4l2_fmtdesc fmtd;
-
- if (copy_from_user(&fmtd, arg, sizeof(fmtd)))
- return -EFAULT;
-
- if (fmtd.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
- return -EINVAL;
-
- if (fmtd.index == 0) {
- strcpy(fmtd.description, "bayer rgb");
- fmtd.pixelformat = V4L2_PIX_FMT_SBGGR8;
- } else if (fmtd.index == 1) {
- strcpy(fmtd.description, "compressed");
- fmtd.pixelformat = V4L2_PIX_FMT_ET61X251;
- 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
-et61x251_vidioc_g_fmt(struct et61x251_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->colorspace = (pfmt->pixelformat == V4L2_PIX_FMT_ET61X251) ?
- 0 : V4L2_COLORSPACE_SRGB;
- pfmt->bytesperline = (pfmt->pixelformat==V4L2_PIX_FMT_ET61X251)
- ? 0 : (pfmt->width * pfmt->priv) / 8;
- 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
-et61x251_vidioc_try_s_fmt(struct et61x251_device* cam, unsigned int cmd,
- void __user * arg)
-{
- struct et61x251_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;
- u8 scale;
- const enum et61x251_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));
-
- { /* calculate the actual scaling factor */
- u32 a, b;
- a = rect.width * rect.height;
- b = pix->width * pix->height;
- scale = b ? (u8)((a / b) < 4 ? 1 : 2) : 1;
- }
-
- rect.width = scale * pix->width;
- rect.height = scale * pix->height;
-
- if (rect.width < 16)
- rect.width = 16;
- if (rect.height < 16)
- rect.height = 16;
- 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 &= ~15L;
- rect.height &= ~15L;
-
- { /* adjust the scaling factor */
- u32 a, b;
- a = rect.width * rect.height;
- b = pix->width * pix->height;
- scale = b ? (u8)((a / b) < 4 ? 1 : 2) : 1;
- }
-
- pix->width = rect.width / scale;
- pix->height = rect.height / scale;
-
- if (pix->pixelformat != V4L2_PIX_FMT_ET61X251 &&
- pix->pixelformat != V4L2_PIX_FMT_SBGGR8)
- pix->pixelformat = pfmt->pixelformat;
- pix->priv = pfmt->priv; /* bpp */
- pix->colorspace = (pix->pixelformat == V4L2_PIX_FMT_ET61X251) ?
- 0 : V4L2_COLORSPACE_SRGB;
- pix->colorspace = pfmt->colorspace;
- pix->bytesperline = (pix->pixelformat == V4L2_PIX_FMT_ET61X251)
- ? 0 : (pix->width * pix->priv) / 8;
- pix->sizeimage = pix->height * ((pix->width * pix->priv) / 8);
- pix->field = V4L2_FIELD_NONE;
-
- if (cmd == VIDIOC_TRY_FMT) {
- if (copy_to_user(arg, &format, sizeof(format)))
- return -EFAULT;
- return 0;
- }
-
- if (cam->module_param.force_munmap)
- for (i = 0; i < cam->nbuffers; i++)
- if (cam->frame[i].vma_use_count) {
- DBG(3, "VIDIOC_S_FMT failed. "
- "Unmap the buffers first.");
- return -EBUSY;
- }
-
- if (cam->stream == STREAM_ON)
- if ((err = et61x251_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)
- et61x251_release_buffers(cam);
-
- err += et61x251_set_pix_format(cam, pix);
- err += et61x251_set_crop(cam, &rect);
- if (s->set_pix_format)
- err += s->set_pix_format(cam, pix);
- if (s->set_crop)
- err += s->set_crop(cam, &rect);
- err += et61x251_set_scale(cam, scale);
-
- 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 %s again.",
- video_device_node_name(cam->v4ldev));
- return -EIO;
- }
-
- memcpy(pfmt, pix, sizeof(*pix));
- memcpy(&(s->_rect), &rect, sizeof(rect));
-
- if ((cam->module_param.force_munmap || cam->io == IO_READ) &&
- nbuffers != et61x251_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 %s again.",
- video_device_node_name(cam->v4ldev));
- return -ENOMEM;
- }
-
- if (cam->io == IO_READ)
- et61x251_empty_framequeues(cam);
- else if (cam->module_param.force_munmap)
- et61x251_requeue_outqueue(cam);
-
- cam->stream = stream;
-
- return 0;
-}
-
-
-static int
-et61x251_vidioc_g_jpegcomp(struct et61x251_device* cam, void __user * arg)
-{
- if (copy_to_user(arg, &cam->compression,
- sizeof(cam->compression)))
- return -EFAULT;
-
- return 0;
-}
-
-
-static int
-et61x251_vidioc_s_jpegcomp(struct et61x251_device* cam, void __user * arg)
-{
- struct v4l2_jpegcompression jc;
- const enum et61x251_stream_state stream = cam->stream;
- int err = 0;
-
- if (copy_from_user(&jc, arg, sizeof(jc)))
- return -EFAULT;
-
- if (jc.quality != 0 && jc.quality != 1)
- return -EINVAL;
-
- if (cam->stream == STREAM_ON)
- if ((err = et61x251_stream_interrupt(cam)))
- return err;
-
- err += et61x251_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 "
- "%s again.", video_device_node_name(cam->v4ldev));
- return -EIO;
- }
-
- cam->compression.quality = jc.quality;
-
- cam->stream = stream;
-
- return 0;
-}
-
-
-static int
-et61x251_vidioc_reqbufs(struct et61x251_device* cam, void __user * arg)
-{
- struct v4l2_requestbuffers rb;
- u32 i;
- int err;
-
- if (copy_from_user(&rb, arg, sizeof(rb)))
- return -EFAULT;
-
- if (rb.type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
- rb.memory != V4L2_MEMORY_MMAP)
- return -EINVAL;
-
- if (cam->io == IO_READ) {
- DBG(3, "Close and open the device again to choose the mmap "
- "I/O method");
- return -EBUSY;
- }
-
- for (i = 0; i < cam->nbuffers; i++)
- if (cam->frame[i].vma_use_count) {
- DBG(3, "VIDIOC_REQBUFS failed. "
- "Previous buffers are still mapped.");
- return -EBUSY;
- }
-
- if (cam->stream == STREAM_ON)
- if ((err = et61x251_stream_interrupt(cam)))
- return err;
-
- et61x251_empty_framequeues(cam);
-
- et61x251_release_buffers(cam);
- if (rb.count)
- rb.count = et61x251_request_buffers(cam, rb.count, IO_MMAP);
-
- if (copy_to_user(arg, &rb, sizeof(rb))) {
- et61x251_release_buffers(cam);
- cam->io = IO_NONE;
- return -EFAULT;
- }
-
- cam->io = rb.count ? IO_MMAP : IO_NONE;
-
- return 0;
-}
-
-
-static int
-et61x251_vidioc_querybuf(struct et61x251_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
-et61x251_vidioc_qbuf(struct et61x251_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
-et61x251_vidioc_dqbuf(struct et61x251_device* cam, struct file* filp,
- void __user * arg)
-{
- struct v4l2_buffer b;
- struct et61x251_frame_t *f;
- unsigned long lock_flags;
- long timeout;
-
- if (copy_from_user(&b, arg, sizeof(b)))
- return -EFAULT;
-
- if (b.type != V4L2_BUF_TYPE_VIDEO_CAPTURE || cam->io!= IO_MMAP)
- return -EINVAL;
-
- if (list_empty(&cam->outqueue)) {
- if (cam->stream == STREAM_OFF)
- return -EINVAL;
- if (filp->f_flags & O_NONBLOCK)
- return -EAGAIN;
- timeout = wait_event_interruptible_timeout
- ( cam->wait_frame,
- (!list_empty(&cam->outqueue)) ||
- (cam->state & DEV_DISCONNECTED) ||
- (cam->state & DEV_MISCONFIGURED),
- cam->module_param.frame_timeout *
- 1000 * msecs_to_jiffies(1) );
- if (timeout < 0)
- return timeout;
- if (cam->state & DEV_DISCONNECTED)
- return -ENODEV;
- if (!timeout || (cam->state & DEV_MISCONFIGURED))
- return -EIO;
- }
-
- spin_lock_irqsave(&cam->queue_lock, lock_flags);
- f = list_entry(cam->outqueue.next, struct et61x251_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
-et61x251_vidioc_streamon(struct et61x251_device* cam, void __user * arg)
-{
- int type;
-
- if (copy_from_user(&type, arg, sizeof(type)))
- return -EFAULT;
-
- if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE || cam->io != IO_MMAP)
- return -EINVAL;
-
- cam->stream = STREAM_ON;
-
- DBG(3, "Stream on");
-
- return 0;
-}
-
-
-static int
-et61x251_vidioc_streamoff(struct et61x251_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 = et61x251_stream_interrupt(cam)))
- return err;
-
- et61x251_empty_framequeues(cam);
-
- DBG(3, "Stream off");
-
- return 0;
-}
-
-
-static int
-et61x251_vidioc_g_parm(struct et61x251_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
-et61x251_vidioc_s_parm(struct et61x251_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 > ET61X251_MAX_FRAMES)
- sp.parm.capture.readbuffers = ET61X251_MAX_FRAMES;
-
- if (copy_to_user(arg, &sp, sizeof(sp)))
- return -EFAULT;
-
- cam->nreadbuffers = sp.parm.capture.readbuffers;
-
- return 0;
-}
-
-
-static long et61x251_ioctl_v4l2(struct file *filp,
- unsigned int cmd, void __user *arg)
-{
- struct et61x251_device *cam = video_drvdata(filp);
-
- switch (cmd) {
-
- case VIDIOC_QUERYCAP:
- return et61x251_vidioc_querycap(cam, arg);
-
- case VIDIOC_ENUMINPUT:
- return et61x251_vidioc_enuminput(cam, arg);
-
- case VIDIOC_G_INPUT:
- return et61x251_vidioc_g_input(cam, arg);
-
- case VIDIOC_S_INPUT:
- return et61x251_vidioc_s_input(cam, arg);
-
- case VIDIOC_QUERYCTRL:
- return et61x251_vidioc_query_ctrl(cam, arg);
-
- case VIDIOC_G_CTRL:
- return et61x251_vidioc_g_ctrl(cam, arg);
-
- case VIDIOC_S_CTRL:
- return et61x251_vidioc_s_ctrl(cam, arg);
-
- case VIDIOC_CROPCAP:
- return et61x251_vidioc_cropcap(cam, arg);
-
- case VIDIOC_G_CROP:
- return et61x251_vidioc_g_crop(cam, arg);
-
- case VIDIOC_S_CROP:
- return et61x251_vidioc_s_crop(cam, arg);
-
- case VIDIOC_ENUM_FMT:
- return et61x251_vidioc_enum_fmt(cam, arg);
-
- case VIDIOC_G_FMT:
- return et61x251_vidioc_g_fmt(cam, arg);
-
- case VIDIOC_TRY_FMT:
- case VIDIOC_S_FMT:
- return et61x251_vidioc_try_s_fmt(cam, cmd, arg);
-
- case VIDIOC_ENUM_FRAMESIZES:
- return et61x251_vidioc_enum_framesizes(cam, arg);
-
- case VIDIOC_G_JPEGCOMP:
- return et61x251_vidioc_g_jpegcomp(cam, arg);
-
- case VIDIOC_S_JPEGCOMP:
- return et61x251_vidioc_s_jpegcomp(cam, arg);
-
- case VIDIOC_REQBUFS:
- return et61x251_vidioc_reqbufs(cam, arg);
-
- case VIDIOC_QUERYBUF:
- return et61x251_vidioc_querybuf(cam, arg);
-
- case VIDIOC_QBUF:
- return et61x251_vidioc_qbuf(cam, arg);
-
- case VIDIOC_DQBUF:
- return et61x251_vidioc_dqbuf(cam, filp, arg);
-
- case VIDIOC_STREAMON:
- return et61x251_vidioc_streamon(cam, arg);
-
- case VIDIOC_STREAMOFF:
- return et61x251_vidioc_streamoff(cam, arg);
-
- case VIDIOC_G_PARM:
- return et61x251_vidioc_g_parm(cam, arg);
-
- case VIDIOC_S_PARM:
- return et61x251_vidioc_s_parm(cam, arg);
-
- default:
- return -ENOTTY;
-
- }
-}
-
-
-static long et61x251_ioctl(struct file *filp,
- unsigned int cmd, unsigned long arg)
-{
- struct et61x251_device *cam = video_drvdata(filp);
- long 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, "et61x251", cmd);
-
- err = et61x251_ioctl_v4l2(filp, cmd, (void __user *)arg);
-
- mutex_unlock(&cam->fileop_mutex);
-
- return err;
-}
-
-
-static const struct v4l2_file_operations et61x251_fops = {
- .owner = THIS_MODULE,
- .open = et61x251_open,
- .release = et61x251_release,
- .unlocked_ioctl = et61x251_ioctl,
- .read = et61x251_read,
- .poll = et61x251_poll,
- .mmap = et61x251_mmap,
-};
-
-/*****************************************************************************/
-
-/* It exists a single interface only. We do not need to validate anything. */
-static int
-et61x251_usb_probe(struct usb_interface* intf, const struct usb_device_id* id)
-{
- struct usb_device *udev = interface_to_usbdev(intf);
- struct et61x251_device* cam;
- static unsigned int dev_nr;
- unsigned int i;
- int err = 0;
-
- if (!(cam = kzalloc(sizeof(struct et61x251_device), GFP_KERNEL)))
- return -ENOMEM;
-
- cam->usbdev = udev;
-
- if (!(cam->control_buffer = kzalloc(8, GFP_KERNEL))) {
- DBG(1, "kmalloc() failed");
- err = -ENOMEM;
- goto fail;
- }
-
- if (!(cam->v4ldev = video_device_alloc())) {
- DBG(1, "video_device_alloc() failed");
- err = -ENOMEM;
- goto fail;
- }
-
- DBG(2, "ET61X[12]51 PC Camera Controller detected "
- "(vid/pid 0x%04X:0x%04X)",id->idVendor, id->idProduct);
-
- for (i = 0; et61x251_sensor_table[i]; i++) {
- err = et61x251_sensor_table[i](cam);
- if (!err)
- break;
- }
-
- if (!err)
- DBG(2, "%s image sensor detected", cam->sensor.name);
- else {
- DBG(1, "No supported image sensor detected");
- err = -ENODEV;
- goto fail;
- }
-
- if (et61x251_init(cam)) {
- DBG(1, "Initialization failed. I will retry on open().");
- cam->state |= DEV_MISCONFIGURED;
- }
-
- strcpy(cam->v4ldev->name, "ET61X[12]51 PC Camera");
- cam->v4ldev->fops = &et61x251_fops;
- cam->v4ldev->release = video_device_release;
- cam->v4ldev->parent = &udev->dev;
- video_set_drvdata(cam->v4ldev, cam);
-
- init_completion(&cam->probe);
-
- err = video_register_device(cam->v4ldev, VFL_TYPE_GRABBER,
- video_nr[dev_nr]);
- if (err) {
- DBG(1, "V4L2 device registration failed");
- if (err == -ENFILE && video_nr[dev_nr] == -1)
- DBG(1, "Free /dev/videoX node not found");
- video_nr[dev_nr] = -1;
- dev_nr = (dev_nr < ET61X251_MAX_DEVICES-1) ? dev_nr+1 : 0;
- complete_all(&cam->probe);
- goto fail;
- }
-
- DBG(2, "V4L2 device registered as %s",
- video_device_node_name(cam->v4ldev));
-
- cam->module_param.force_munmap = force_munmap[dev_nr];
- cam->module_param.frame_timeout = frame_timeout[dev_nr];
-
- dev_nr = (dev_nr < ET61X251_MAX_DEVICES-1) ? dev_nr+1 : 0;
-
-#ifdef CONFIG_VIDEO_ADV_DEBUG
- err = et61x251_create_sysfs(cam);
- if (!err)
- DBG(2, "Optional device control through 'sysfs' "
- "interface ready");
- else
- DBG(2, "Failed to create 'sysfs' interface for optional "
- "device controlling. Error #%d", err);
-#else
- DBG(2, "Optional device control through 'sysfs' interface disabled");
- DBG(3, "Compile the kernel with the 'CONFIG_VIDEO_ADV_DEBUG' "
- "configuration option to enable it.");
-#endif
-
- usb_set_intfdata(intf, cam);
- kref_init(&cam->kref);
- usb_get_dev(cam->usbdev);
-
- complete_all(&cam->probe);
-
- return 0;
-
-fail:
- if (cam) {
- kfree(cam->control_buffer);
- if (cam->v4ldev)
- video_device_release(cam->v4ldev);
- kfree(cam);
- }
- return err;
-}
-
-
-static void et61x251_usb_disconnect(struct usb_interface* intf)
-{
- struct et61x251_device* cam;
-
- down_write(&et61x251_dev_lock);
-
- cam = usb_get_intfdata(intf);
-
- DBG(2, "Disconnecting %s...", cam->v4ldev->name);
-
- if (cam->users) {
- DBG(2, "Device %s is open! Deregistration and memory "
- "deallocation are deferred.",
- video_device_node_name(cam->v4ldev));
- cam->state |= DEV_MISCONFIGURED;
- et61x251_stop_transfer(cam);
- cam->state |= DEV_DISCONNECTED;
- wake_up_interruptible(&cam->wait_frame);
- wake_up(&cam->wait_stream);
- } else
- cam->state |= DEV_DISCONNECTED;
-
- wake_up_interruptible_all(&cam->wait_open);
-
- kref_put(&cam->kref, et61x251_release_resources);
-
- up_write(&et61x251_dev_lock);
-}
-
-
-static struct usb_driver et61x251_usb_driver = {
- .name = "et61x251",
- .id_table = et61x251_id_table,
- .probe = et61x251_usb_probe,
- .disconnect = et61x251_usb_disconnect,
-};
-
-module_usb_driver(et61x251_usb_driver);
projects / platform / kernel / linux-rpi.git / commitdiff