| /*************************************************************************** |
| * Video4Linux2 driver for ZC0301[P] Image Processor and Control Chip * |
| * * |
| * Copyright (C) 2006 by Luca Risolia <luca.risolia@studio.unibo.it> * |
| * * |
| * Informations about the chip internals needed to enable the I2C protocol * |
| * have been taken from the documentation of the ZC030x Video4Linux1 * |
| * driver written by Andrew Birkett <andy@nobugs.org> * |
| * * |
| * This program is free software; you can redistribute it and/or modify * |
| * it under the terms of the GNU General Public License as published by * |
| * the Free Software Foundation; either version 2 of the License, or * |
| * (at your option) any later version. * |
| * * |
| * This program is distributed in the hope that it will be useful, * |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of * |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * |
| * GNU General Public License for more details. * |
| * * |
| * You should have received a copy of the GNU General Public License * |
| * along with this program; if not, write to the Free Software * |
| * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. * |
| ***************************************************************************/ |
| |
| #include <linux/module.h> |
| #include <linux/init.h> |
| #include <linux/kernel.h> |
| #include <linux/param.h> |
| #include <linux/moduleparam.h> |
| #include <linux/errno.h> |
| #include <linux/slab.h> |
| #include <linux/device.h> |
| #include <linux/fs.h> |
| #include <linux/delay.h> |
| #include <linux/compiler.h> |
| #include <linux/ioctl.h> |
| #include <linux/poll.h> |
| #include <linux/stat.h> |
| #include <linux/mm.h> |
| #include <linux/vmalloc.h> |
| #include <linux/page-flags.h> |
| #include <linux/byteorder/generic.h> |
| #include <asm/page.h> |
| #include <asm/uaccess.h> |
| |
| #include "zc0301.h" |
| |
| /*****************************************************************************/ |
| |
| #define ZC0301_MODULE_NAME "V4L2 driver for ZC0301[P] " \ |
| "Image Processor and Control Chip" |
| #define ZC0301_MODULE_AUTHOR "(C) 2006 Luca Risolia" |
| #define ZC0301_AUTHOR_EMAIL "<luca.risolia@studio.unibo.it>" |
| #define ZC0301_MODULE_LICENSE "GPL" |
| #define ZC0301_MODULE_VERSION "1:1.05" |
| #define ZC0301_MODULE_VERSION_CODE KERNEL_VERSION(1, 0, 5) |
| |
| /*****************************************************************************/ |
| |
| MODULE_DEVICE_TABLE(usb, zc0301_id_table); |
| |
| MODULE_AUTHOR(ZC0301_MODULE_AUTHOR " " ZC0301_AUTHOR_EMAIL); |
| MODULE_DESCRIPTION(ZC0301_MODULE_NAME); |
| MODULE_VERSION(ZC0301_MODULE_VERSION); |
| MODULE_LICENSE(ZC0301_MODULE_LICENSE); |
| |
| static short video_nr[] = {[0 ... ZC0301_MAX_DEVICES-1] = -1}; |
| module_param_array(video_nr, short, NULL, 0444); |
| MODULE_PARM_DESC(video_nr, |
| "\n<-1|n[,...]> Specify V4L2 minor mode number." |
| "\n -1 = use next available (default)" |
| "\n n = use minor number n (integer >= 0)" |
| "\nYou can specify up to " |
| __MODULE_STRING(ZC0301_MAX_DEVICES) " cameras this way." |
| "\nFor example:" |
| "\nvideo_nr=-1,2,-1 would assign minor number 2 to" |
| "\nthe second registered camera and use auto for the first" |
| "\none and for every other camera." |
| "\n"); |
| |
| static short force_munmap[] = {[0 ... ZC0301_MAX_DEVICES-1] = |
| ZC0301_FORCE_MUNMAP}; |
| module_param_array(force_munmap, bool, NULL, 0444); |
| MODULE_PARM_DESC(force_munmap, |
| "\n<0|1[,...]> Force the application to unmap previously" |
| "\nmapped buffer memory before calling any VIDIOC_S_CROP or" |
| "\nVIDIOC_S_FMT ioctl's. Not all the applications support" |
| "\nthis feature. This parameter is specific for each" |
| "\ndetected camera." |
| "\n 0 = do not force memory unmapping" |
| "\n 1 = force memory unmapping (save memory)" |
| "\nDefault value is "__MODULE_STRING(SN9C102_FORCE_MUNMAP)"." |
| "\n"); |
| |
| static unsigned int frame_timeout[] = {[0 ... ZC0301_MAX_DEVICES-1] = |
| ZC0301_FRAME_TIMEOUT}; |
| module_param_array(frame_timeout, uint, NULL, 0644); |
| MODULE_PARM_DESC(frame_timeout, |
| "\n<n[,...]> Timeout for a video frame in seconds." |
| "\nThis parameter is specific for each detected camera." |
| "\nDefault value is "__MODULE_STRING(ZC0301_FRAME_TIMEOUT)"." |
| "\n"); |
| |
| #ifdef ZC0301_DEBUG |
| static unsigned short debug = ZC0301_DEBUG_LEVEL; |
| module_param(debug, ushort, 0644); |
| MODULE_PARM_DESC(debug, |
| "\n<n> Debugging information level, from 0 to 3:" |
| "\n0 = none (use carefully)" |
| "\n1 = critical errors" |
| "\n2 = significant informations" |
| "\n3 = more verbose messages" |
| "\nLevel 3 is useful for testing only, when only " |
| "one device is used." |
| "\nDefault value is "__MODULE_STRING(ZC0301_DEBUG_LEVEL)"." |
| "\n"); |
| #endif |
| |
| /*****************************************************************************/ |
| |
| static u32 |
| zc0301_request_buffers(struct zc0301_device* cam, u32 count, |
| enum zc0301_io_method io) |
| { |
| struct v4l2_pix_format* p = &(cam->sensor.pix_format); |
| struct v4l2_rect* r = &(cam->sensor.cropcap.bounds); |
| const size_t imagesize = cam->module_param.force_munmap || |
| io == IO_READ ? |
| (p->width * p->height * p->priv) / 8 : |
| (r->width * r->height * p->priv) / 8; |
| void* buff = NULL; |
| u32 i; |
| |
| if (count > ZC0301_MAX_FRAMES) |
| count = ZC0301_MAX_FRAMES; |
| |
| cam->nbuffers = count; |
| while (cam->nbuffers > 0) { |
| if ((buff = vmalloc_32(cam->nbuffers * PAGE_ALIGN(imagesize)))) |
| break; |
| cam->nbuffers--; |
| } |
| |
| for (i = 0; i < cam->nbuffers; i++) { |
| cam->frame[i].bufmem = buff + i*PAGE_ALIGN(imagesize); |
| cam->frame[i].buf.index = i; |
| cam->frame[i].buf.m.offset = i*PAGE_ALIGN(imagesize); |
| cam->frame[i].buf.length = imagesize; |
| cam->frame[i].buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
| cam->frame[i].buf.sequence = 0; |
| cam->frame[i].buf.field = V4L2_FIELD_NONE; |
| cam->frame[i].buf.memory = V4L2_MEMORY_MMAP; |
| cam->frame[i].buf.flags = 0; |
| } |
| |
| return cam->nbuffers; |
| } |
| |
| |
| static void zc0301_release_buffers(struct zc0301_device* cam) |
| { |
| if (cam->nbuffers) { |
| vfree(cam->frame[0].bufmem); |
| cam->nbuffers = 0; |
| } |
| cam->frame_current = NULL; |
| } |
| |
| |
| static void zc0301_empty_framequeues(struct zc0301_device* cam) |
| { |
| u32 i; |
| |
| INIT_LIST_HEAD(&cam->inqueue); |
| INIT_LIST_HEAD(&cam->outqueue); |
| |
| for (i = 0; i < ZC0301_MAX_FRAMES; i++) { |
| cam->frame[i].state = F_UNUSED; |
| cam->frame[i].buf.bytesused = 0; |
| } |
| } |
| |
| |
| static void zc0301_requeue_outqueue(struct zc0301_device* cam) |
| { |
| struct zc0301_frame_t *i; |
| |
| list_for_each_entry(i, &cam->outqueue, frame) { |
| i->state = F_QUEUED; |
| list_add(&i->frame, &cam->inqueue); |
| } |
| |
| INIT_LIST_HEAD(&cam->outqueue); |
| } |
| |
| |
| static void zc0301_queue_unusedframes(struct zc0301_device* cam) |
| { |
| unsigned long lock_flags; |
| u32 i; |
| |
| for (i = 0; i < cam->nbuffers; i++) |
| if (cam->frame[i].state == F_UNUSED) { |
| cam->frame[i].state = F_QUEUED; |
| spin_lock_irqsave(&cam->queue_lock, lock_flags); |
| list_add_tail(&cam->frame[i].frame, &cam->inqueue); |
| spin_unlock_irqrestore(&cam->queue_lock, lock_flags); |
| } |
| } |
| |
| /*****************************************************************************/ |
| |
| int zc0301_write_reg(struct zc0301_device* cam, u16 index, u16 value) |
| { |
| struct usb_device* udev = cam->usbdev; |
| int res; |
| |
| res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0xa0, 0x40, |
| value, index, NULL, 0, ZC0301_CTRL_TIMEOUT); |
| if (res < 0) { |
| DBG(3, "Failed to write a register (index 0x%04X, " |
| "value 0x%02X, error %d)",index, value, res); |
| return -1; |
| } |
| |
| return 0; |
| } |
| |
| |
| int zc0301_read_reg(struct zc0301_device* cam, u16 index) |
| { |
| struct usb_device* udev = cam->usbdev; |
| u8* buff = cam->control_buffer; |
| int res; |
| |
| res = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), 0xa1, 0xc0, |
| 0x0001, index, buff, 1, ZC0301_CTRL_TIMEOUT); |
| if (res < 0) |
| DBG(3, "Failed to read a register (index 0x%04X, error %d)", |
| index, res); |
| |
| PDBGG("Read: index 0x%04X, value: 0x%04X", index, (int)(*buff)); |
| |
| return (res >= 0) ? (int)(*buff) : -1; |
| } |
| |
| |
| int zc0301_i2c_read(struct zc0301_device* cam, u16 address, u8 length) |
| { |
| int err = 0, res, r0, r1; |
| |
| err += zc0301_write_reg(cam, 0x0092, address); |
| err += zc0301_write_reg(cam, 0x0090, 0x02); |
| |
| msleep(1); |
| |
| res = zc0301_read_reg(cam, 0x0091); |
| if (res < 0) |
| err += res; |
| r0 = zc0301_read_reg(cam, 0x0095); |
| if (r0 < 0) |
| err += r0; |
| r1 = zc0301_read_reg(cam, 0x0096); |
| if (r1 < 0) |
| err += r1; |
| |
| res = (length <= 1) ? r0 : r0 | (r1 << 8); |
| |
| if (err) |
| DBG(3, "I2C read failed at address 0x%04X, value: 0x%04X", |
| address, res); |
| |
| |
| PDBGG("I2C read: address 0x%04X, value: 0x%04X", address, res); |
| |
| return err ? -1 : res; |
| } |
| |
| |
| int zc0301_i2c_write(struct zc0301_device* cam, u16 address, u16 value) |
| { |
| int err = 0, res; |
| |
| err += zc0301_write_reg(cam, 0x0092, address); |
| err += zc0301_write_reg(cam, 0x0093, value & 0xff); |
| err += zc0301_write_reg(cam, 0x0094, value >> 8); |
| err += zc0301_write_reg(cam, 0x0090, 0x01); |
| |
| msleep(1); |
| |
| res = zc0301_read_reg(cam, 0x0091); |
| if (res < 0) |
| err += res; |
| |
| if (err) |
| DBG(3, "I2C write failed at address 0x%04X, value: 0x%04X", |
| address, value); |
| |
| PDBGG("I2C write: address 0x%04X, value: 0x%04X", address, value); |
| |
| return err ? -1 : 0; |
| } |
| |
| /*****************************************************************************/ |
| |
| static void zc0301_urb_complete(struct urb *urb) |
| { |
| struct zc0301_device* cam = urb->context; |
| struct zc0301_frame_t** f; |
| size_t imagesize; |
| u8 i; |
| int err = 0; |
| |
| if (urb->status == -ENOENT) |
| return; |
| |
| f = &cam->frame_current; |
| |
| if (cam->stream == STREAM_INTERRUPT) { |
| cam->stream = STREAM_OFF; |
| if ((*f)) |
| (*f)->state = F_QUEUED; |
| DBG(3, "Stream interrupted"); |
| wake_up(&cam->wait_stream); |
| } |
| |
| if (cam->state & DEV_DISCONNECTED) |
| return; |
| |
| if (cam->state & DEV_MISCONFIGURED) { |
| wake_up_interruptible(&cam->wait_frame); |
| return; |
| } |
| |
| if (cam->stream == STREAM_OFF || list_empty(&cam->inqueue)) |
| goto resubmit_urb; |
| |
| if (!(*f)) |
| (*f) = list_entry(cam->inqueue.next, struct zc0301_frame_t, |
| frame); |
| |
| imagesize = (cam->sensor.pix_format.width * |
| cam->sensor.pix_format.height * |
| cam->sensor.pix_format.priv) / 8; |
| |
| for (i = 0; i < urb->number_of_packets; i++) { |
| unsigned int len, status; |
| void *pos; |
| u16* soi; |
| u8 sof; |
| |
| len = urb->iso_frame_desc[i].actual_length; |
| status = urb->iso_frame_desc[i].status; |
| pos = urb->iso_frame_desc[i].offset + urb->transfer_buffer; |
| |
| if (status) { |
| DBG(3, "Error in isochronous frame"); |
| (*f)->state = F_ERROR; |
| continue; |
| } |
| |
| sof = (*(soi = pos) == 0xd8ff); |
| |
| PDBGG("Isochrnous frame: length %u, #%u i,", len, i); |
| |
| if ((*f)->state == F_QUEUED || (*f)->state == F_ERROR) |
| start_of_frame: |
| if (sof) { |
| (*f)->state = F_GRABBING; |
| (*f)->buf.bytesused = 0; |
| do_gettimeofday(&(*f)->buf.timestamp); |
| DBG(3, "SOF detected: new video frame"); |
| } |
| |
| if ((*f)->state == F_GRABBING) { |
| if (sof && (*f)->buf.bytesused) |
| goto end_of_frame; |
| |
| if ((*f)->buf.bytesused + len > imagesize) { |
| DBG(3, "Video frame size exceeded"); |
| (*f)->state = F_ERROR; |
| continue; |
| } |
| |
| memcpy((*f)->bufmem+(*f)->buf.bytesused, pos, len); |
| (*f)->buf.bytesused += len; |
| |
| if ((*f)->buf.bytesused == imagesize) { |
| u32 b; |
| end_of_frame: |
| b = (*f)->buf.bytesused; |
| (*f)->state = F_DONE; |
| (*f)->buf.sequence= ++cam->frame_count; |
| spin_lock(&cam->queue_lock); |
| list_move_tail(&(*f)->frame, &cam->outqueue); |
| if (!list_empty(&cam->inqueue)) |
| (*f) = list_entry(cam->inqueue.next, |
| struct zc0301_frame_t, |
| frame); |
| else |
| (*f) = NULL; |
| spin_unlock(&cam->queue_lock); |
| DBG(3, "Video frame captured: : %lu bytes", |
| (unsigned long)(b)); |
| |
| if (!(*f)) |
| goto resubmit_urb; |
| |
| if (sof) |
| goto start_of_frame; |
| } |
| } |
| } |
| |
| resubmit_urb: |
| urb->dev = cam->usbdev; |
| err = usb_submit_urb(urb, GFP_ATOMIC); |
| if (err < 0 && err != -EPERM) { |
| cam->state |= DEV_MISCONFIGURED; |
| DBG(1, "usb_submit_urb() failed"); |
| } |
| |
| wake_up_interruptible(&cam->wait_frame); |
| } |
| |
| |
| static int zc0301_start_transfer(struct zc0301_device* cam) |
| { |
| struct usb_device *udev = cam->usbdev; |
| struct usb_host_interface* altsetting = usb_altnum_to_altsetting( |
| usb_ifnum_to_if(udev, 0), |
| ZC0301_ALTERNATE_SETTING); |
| const unsigned int psz = altsetting->endpoint[0].desc.wMaxPacketSize; |
| struct urb* urb; |
| s8 i, j; |
| int err = 0; |
| |
| for (i = 0; i < ZC0301_URBS; i++) { |
| cam->transfer_buffer[i] = kzalloc(ZC0301_ISO_PACKETS * psz, |
| GFP_KERNEL); |
| if (!cam->transfer_buffer[i]) { |
| err = -ENOMEM; |
| DBG(1, "Not enough memory"); |
| goto free_buffers; |
| } |
| } |
| |
| for (i = 0; i < ZC0301_URBS; i++) { |
| urb = usb_alloc_urb(ZC0301_ISO_PACKETS, GFP_KERNEL); |
| cam->urb[i] = urb; |
| if (!urb) { |
| err = -ENOMEM; |
| DBG(1, "usb_alloc_urb() failed"); |
| goto free_urbs; |
| } |
| urb->dev = udev; |
| urb->context = cam; |
| urb->pipe = usb_rcvisocpipe(udev, 1); |
| urb->transfer_flags = URB_ISO_ASAP; |
| urb->number_of_packets = ZC0301_ISO_PACKETS; |
| urb->complete = zc0301_urb_complete; |
| urb->transfer_buffer = cam->transfer_buffer[i]; |
| urb->transfer_buffer_length = psz * ZC0301_ISO_PACKETS; |
| urb->interval = 1; |
| for (j = 0; j < ZC0301_ISO_PACKETS; j++) { |
| urb->iso_frame_desc[j].offset = psz * j; |
| urb->iso_frame_desc[j].length = psz; |
| } |
| } |
| |
| err = usb_set_interface(udev, 0, ZC0301_ALTERNATE_SETTING); |
| if (err) { |
| DBG(1, "usb_set_interface() failed"); |
| goto free_urbs; |
| } |
| |
| cam->frame_current = NULL; |
| |
| for (i = 0; i < ZC0301_URBS; i++) { |
| err = usb_submit_urb(cam->urb[i], GFP_KERNEL); |
| if (err) { |
| for (j = i-1; j >= 0; j--) |
| usb_kill_urb(cam->urb[j]); |
| DBG(1, "usb_submit_urb() failed, error %d", err); |
| goto free_urbs; |
| } |
| } |
| |
| return 0; |
| |
| free_urbs: |
| for (i = 0; (i < ZC0301_URBS) && cam->urb[i]; i++) |
| usb_free_urb(cam->urb[i]); |
| |
| free_buffers: |
| for (i = 0; (i < ZC0301_URBS) && cam->transfer_buffer[i]; i++) |
| kfree(cam->transfer_buffer[i]); |
| |
| return err; |
| } |
| |
| |
| static int zc0301_stop_transfer(struct zc0301_device* cam) |
| { |
| struct usb_device *udev = cam->usbdev; |
| s8 i; |
| int err = 0; |
| |
| if (cam->state & DEV_DISCONNECTED) |
| return 0; |
| |
| for (i = ZC0301_URBS-1; i >= 0; i--) { |
| usb_kill_urb(cam->urb[i]); |
| usb_free_urb(cam->urb[i]); |
| kfree(cam->transfer_buffer[i]); |
| } |
| |
| err = usb_set_interface(udev, 0, 0); /* 0 Mb/s */ |
| if (err) |
| DBG(3, "usb_set_interface() failed"); |
| |
| return err; |
| } |
| |
| |
| static int zc0301_stream_interrupt(struct zc0301_device* cam) |
| { |
| long timeout; |
| |
| cam->stream = STREAM_INTERRUPT; |
| timeout = wait_event_timeout(cam->wait_stream, |
| (cam->stream == STREAM_OFF) || |
| (cam->state & DEV_DISCONNECTED), |
| ZC0301_URB_TIMEOUT); |
| if (cam->state & DEV_DISCONNECTED) |
| return -ENODEV; |
| else if (cam->stream != STREAM_OFF) { |
| cam->state |= DEV_MISCONFIGURED; |
| DBG(1, "URB timeout reached. The camera is misconfigured. To " |
| "use it, close and open /dev/video%d again.", |
| cam->v4ldev->minor); |
| return -EIO; |
| } |
| |
| return 0; |
| } |
| |
| /*****************************************************************************/ |
| |
| static int |
| zc0301_set_compression(struct zc0301_device* cam, |
| struct v4l2_jpegcompression* compression) |
| { |
| int r, err = 0; |
| |
| if ((r = zc0301_read_reg(cam, 0x0008)) < 0) |
| err += r; |
| err += zc0301_write_reg(cam, 0x0008, r | 0x11 | compression->quality); |
| |
| return err ? -EIO : 0; |
| } |
| |
| |
| static int zc0301_init(struct zc0301_device* cam) |
| { |
| struct zc0301_sensor* s = &cam->sensor; |
| struct v4l2_control ctrl; |
| struct v4l2_queryctrl *qctrl; |
| struct v4l2_rect* rect; |
| u8 i = 0; |
| int err = 0; |
| |
| if (!(cam->state & DEV_INITIALIZED)) { |
| init_waitqueue_head(&cam->open); |
| qctrl = s->qctrl; |
| rect = &(s->cropcap.defrect); |
| cam->compression.quality = ZC0301_COMPRESSION_QUALITY; |
| } else { /* use current values */ |
| qctrl = s->_qctrl; |
| rect = &(s->_rect); |
| } |
| |
| if (s->init) { |
| err = s->init(cam); |
| if (err) { |
| DBG(3, "Sensor initialization failed"); |
| return err; |
| } |
| } |
| |
| if ((err = zc0301_set_compression(cam, &cam->compression))) { |
| DBG(3, "set_compression() failed"); |
| return err; |
| } |
| |
| if (s->set_crop) |
| if ((err = s->set_crop(cam, rect))) { |
| DBG(3, "set_crop() failed"); |
| return err; |
| } |
| |
| if (s->set_ctrl) { |
| for (i = 0; i < ARRAY_SIZE(s->qctrl); i++) |
| if (s->qctrl[i].id != 0 && |
| !(s->qctrl[i].flags & V4L2_CTRL_FLAG_DISABLED)) { |
| ctrl.id = s->qctrl[i].id; |
| ctrl.value = qctrl[i].default_value; |
| err = s->set_ctrl(cam, &ctrl); |
| if (err) { |
| DBG(3, "Set %s control failed", |
| s->qctrl[i].name); |
| return err; |
| } |
| DBG(3, "Image sensor supports '%s' control", |
| s->qctrl[i].name); |
| } |
| } |
| |
| if (!(cam->state & DEV_INITIALIZED)) { |
| mutex_init(&cam->fileop_mutex); |
| spin_lock_init(&cam->queue_lock); |
| init_waitqueue_head(&cam->wait_frame); |
| init_waitqueue_head(&cam->wait_stream); |
| cam->nreadbuffers = 2; |
| memcpy(s->_qctrl, s->qctrl, sizeof(s->qctrl)); |
| memcpy(&(s->_rect), &(s->cropcap.defrect), |
| sizeof(struct v4l2_rect)); |
| cam->state |= DEV_INITIALIZED; |
| } |
| |
| DBG(2, "Initialization succeeded"); |
| return 0; |
| } |
| |
| |
| static void zc0301_release_resources(struct zc0301_device* cam) |
| { |
| DBG(2, "V4L2 device /dev/video%d deregistered", cam->v4ldev->minor); |
| video_set_drvdata(cam->v4ldev, NULL); |
| video_unregister_device(cam->v4ldev); |
| kfree(cam->control_buffer); |
| } |
| |
| /*****************************************************************************/ |
| |
| static int zc0301_open(struct inode* inode, struct file* filp) |
| { |
| struct zc0301_device* cam; |
| int err = 0; |
| |
| /* |
| This is the only safe way to prevent race conditions with |
| disconnect |
| */ |
| if (!down_read_trylock(&zc0301_disconnect)) |
| return -ERESTARTSYS; |
| |
| cam = video_get_drvdata(video_devdata(filp)); |
| |
| if (mutex_lock_interruptible(&cam->dev_mutex)) { |
| up_read(&zc0301_disconnect); |
| return -ERESTARTSYS; |
| } |
| |
| if (cam->users) { |
| DBG(2, "Device /dev/video%d is busy...", cam->v4ldev->minor); |
| if ((filp->f_flags & O_NONBLOCK) || |
| (filp->f_flags & O_NDELAY)) { |
| err = -EWOULDBLOCK; |
| goto out; |
| } |
| mutex_unlock(&cam->dev_mutex); |
| err = wait_event_interruptible_exclusive(cam->open, |
| cam->state & DEV_DISCONNECTED |
| || !cam->users); |
| if (err) { |
| up_read(&zc0301_disconnect); |
| return err; |
| } |
| if (cam->state & DEV_DISCONNECTED) { |
| up_read(&zc0301_disconnect); |
| return -ENODEV; |
| } |
| mutex_lock(&cam->dev_mutex); |
| } |
| |
| |
| if (cam->state & DEV_MISCONFIGURED) { |
| err = zc0301_init(cam); |
| if (err) { |
| DBG(1, "Initialization failed again. " |
| "I will retry on next open()."); |
| goto out; |
| } |
| cam->state &= ~DEV_MISCONFIGURED; |
| } |
| |
| if ((err = zc0301_start_transfer(cam))) |
| goto out; |
| |
| filp->private_data = cam; |
| cam->users++; |
| cam->io = IO_NONE; |
| cam->stream = STREAM_OFF; |
| cam->nbuffers = 0; |
| cam->frame_count = 0; |
| zc0301_empty_framequeues(cam); |
| |
| DBG(3, "Video device /dev/video%d is open", cam->v4ldev->minor); |
| |
| out: |
| mutex_unlock(&cam->dev_mutex); |
| up_read(&zc0301_disconnect); |
| return err; |
| } |
| |
| |
| static int zc0301_release(struct inode* inode, struct file* filp) |
| { |
| struct zc0301_device* cam = video_get_drvdata(video_devdata(filp)); |
| |
| mutex_lock(&cam->dev_mutex); /* prevent disconnect() to be called */ |
| |
| zc0301_stop_transfer(cam); |
| |
| zc0301_release_buffers(cam); |
| |
| if (cam->state & DEV_DISCONNECTED) { |
| zc0301_release_resources(cam); |
| usb_put_dev(cam->usbdev); |
| mutex_unlock(&cam->dev_mutex); |
| kfree(cam); |
| return 0; |
| } |
| |
| cam->users--; |
| wake_up_interruptible_nr(&cam->open, 1); |
| |
| DBG(3, "Video device /dev/video%d closed", cam->v4ldev->minor); |
| |
| mutex_unlock(&cam->dev_mutex); |
| |
| return 0; |
| } |
| |
| |
| static ssize_t |
| zc0301_read(struct file* filp, char __user * buf, size_t count, loff_t* f_pos) |
| { |
| struct zc0301_device* cam = video_get_drvdata(video_devdata(filp)); |
| struct zc0301_frame_t* f, * i; |
| unsigned long lock_flags; |
| long timeout; |
| int err = 0; |
| |
| if (mutex_lock_interruptible(&cam->fileop_mutex)) |
| return -ERESTARTSYS; |
| |
| if (cam->state & DEV_DISCONNECTED) { |
| DBG(1, "Device not present"); |
| mutex_unlock(&cam->fileop_mutex); |
| return -ENODEV; |
| } |
| |
| if (cam->state & DEV_MISCONFIGURED) { |
| DBG(1, "The camera is misconfigured. Close and open it " |
| "again."); |
| mutex_unlock(&cam->fileop_mutex); |
| return -EIO; |
| } |
| |
| if (cam->io == IO_MMAP) { |
| DBG(3, "Close and open the device again to choose the read " |
| "method"); |
| mutex_unlock(&cam->fileop_mutex); |
| return -EINVAL; |
| } |
| |
| if (cam->io == IO_NONE) { |
| if (!zc0301_request_buffers(cam, cam->nreadbuffers, IO_READ)) { |
| DBG(1, "read() failed, not enough memory"); |
| mutex_unlock(&cam->fileop_mutex); |
| return -ENOMEM; |
| } |
| cam->io = IO_READ; |
| cam->stream = STREAM_ON; |
| } |
| |
| if (list_empty(&cam->inqueue)) { |
| if (!list_empty(&cam->outqueue)) |
| zc0301_empty_framequeues(cam); |
| zc0301_queue_unusedframes(cam); |
| } |
| |
| if (!count) { |
| mutex_unlock(&cam->fileop_mutex); |
| return 0; |
| } |
| |
| if (list_empty(&cam->outqueue)) { |
| if (filp->f_flags & O_NONBLOCK) { |
| mutex_unlock(&cam->fileop_mutex); |
| return -EAGAIN; |
| } |
| timeout = wait_event_interruptible_timeout |
| ( cam->wait_frame, |
| (!list_empty(&cam->outqueue)) || |
| (cam->state & DEV_DISCONNECTED) || |
| (cam->state & DEV_MISCONFIGURED), |
| cam->module_param.frame_timeout * |
| 1000 * msecs_to_jiffies(1) ); |
| if (timeout < 0) { |
| mutex_unlock(&cam->fileop_mutex); |
| return timeout; |
| } |
| if (cam->state & DEV_DISCONNECTED) { |
| mutex_unlock(&cam->fileop_mutex); |
| return -ENODEV; |
| } |
| if (!timeout || (cam->state & DEV_MISCONFIGURED)) { |
| mutex_unlock(&cam->fileop_mutex); |
| return -EIO; |
| } |
| } |
| |
| f = list_entry(cam->outqueue.prev, struct zc0301_frame_t, frame); |
| |
| if (count > f->buf.bytesused) |
| count = f->buf.bytesused; |
| |
| if (copy_to_user(buf, f->bufmem, count)) { |
| err = -EFAULT; |
| goto exit; |
| } |
| *f_pos += count; |
| |
| exit: |
| spin_lock_irqsave(&cam->queue_lock, lock_flags); |
| list_for_each_entry(i, &cam->outqueue, frame) |
| i->state = F_UNUSED; |
| INIT_LIST_HEAD(&cam->outqueue); |
| spin_unlock_irqrestore(&cam->queue_lock, lock_flags); |
| |
| zc0301_queue_unusedframes(cam); |
| |
| PDBGG("Frame #%lu, bytes read: %zu", |
| (unsigned long)f->buf.index, count); |
| |
| mutex_unlock(&cam->fileop_mutex); |
| |
| return err ? err : count; |
| } |
| |
| |
| static unsigned int zc0301_poll(struct file *filp, poll_table *wait) |
| { |
| struct zc0301_device* cam = video_get_drvdata(video_devdata(filp)); |
| struct zc0301_frame_t* f; |
| unsigned long lock_flags; |
| unsigned int mask = 0; |
| |
| if (mutex_lock_interruptible(&cam->fileop_mutex)) |
| return POLLERR; |
| |
| if (cam->state & DEV_DISCONNECTED) { |
| DBG(1, "Device not present"); |
| goto error; |
| } |
| |
| if (cam->state & DEV_MISCONFIGURED) { |
| DBG(1, "The camera is misconfigured. Close and open it " |
| "again."); |
| goto error; |
| } |
| |
| if (cam->io == IO_NONE) { |
| if (!zc0301_request_buffers(cam, cam->nreadbuffers, IO_READ)) { |
| DBG(1, "poll() failed, not enough memory"); |
| goto error; |
| } |
| cam->io = IO_READ; |
| cam->stream = STREAM_ON; |
| } |
| |
| if (cam->io == IO_READ) { |
| spin_lock_irqsave(&cam->queue_lock, lock_flags); |
| list_for_each_entry(f, &cam->outqueue, frame) |
| f->state = F_UNUSED; |
| INIT_LIST_HEAD(&cam->outqueue); |
| spin_unlock_irqrestore(&cam->queue_lock, lock_flags); |
| zc0301_queue_unusedframes(cam); |
| } |
| |
| poll_wait(filp, &cam->wait_frame, wait); |
| |
| if (!list_empty(&cam->outqueue)) |
| mask |= POLLIN | POLLRDNORM; |
| |
| mutex_unlock(&cam->fileop_mutex); |
| |
| return mask; |
| |
| error: |
| mutex_unlock(&cam->fileop_mutex); |
| return POLLERR; |
| } |
| |
| |
| static void zc0301_vm_open(struct vm_area_struct* vma) |
| { |
| struct zc0301_frame_t* f = vma->vm_private_data; |
| f->vma_use_count++; |
| } |
| |
| |
| static void zc0301_vm_close(struct vm_area_struct* vma) |
| { |
| /* NOTE: buffers are not freed here */ |
| struct zc0301_frame_t* f = vma->vm_private_data; |
| f->vma_use_count--; |
| } |
| |
| |
| static struct vm_operations_struct zc0301_vm_ops = { |
| .open = zc0301_vm_open, |
| .close = zc0301_vm_close, |
| }; |
| |
| |
| static int zc0301_mmap(struct file* filp, struct vm_area_struct *vma) |
| { |
| struct zc0301_device* cam = video_get_drvdata(video_devdata(filp)); |
| unsigned long size = vma->vm_end - vma->vm_start, |
| start = vma->vm_start; |
| void *pos; |
| u32 i; |
| |
| if (mutex_lock_interruptible(&cam->fileop_mutex)) |
| return -ERESTARTSYS; |
| |
| if (cam->state & DEV_DISCONNECTED) { |
| DBG(1, "Device not present"); |
| mutex_unlock(&cam->fileop_mutex); |
| return -ENODEV; |
| } |
| |
| if (cam->state & DEV_MISCONFIGURED) { |
| DBG(1, "The camera is misconfigured. Close and open it " |
| "again."); |
| mutex_unlock(&cam->fileop_mutex); |
| return -EIO; |
| } |
| |
| if (cam->io != IO_MMAP || !(vma->vm_flags & VM_WRITE) || |
| size != PAGE_ALIGN(cam->frame[0].buf.length)) { |
| mutex_unlock(&cam->fileop_mutex); |
| return -EINVAL; |
| } |
| |
| for (i = 0; i < cam->nbuffers; i++) { |
| if ((cam->frame[i].buf.m.offset>>PAGE_SHIFT) == vma->vm_pgoff) |
| break; |
| } |
| if (i == cam->nbuffers) { |
| mutex_unlock(&cam->fileop_mutex); |
| return -EINVAL; |
| } |
| |
| vma->vm_flags |= VM_IO; |
| vma->vm_flags |= VM_RESERVED; |
| |
| pos = cam->frame[i].bufmem; |
| while (size > 0) { /* size is page-aligned */ |
| if (vm_insert_page(vma, start, vmalloc_to_page(pos))) { |
| mutex_unlock(&cam->fileop_mutex); |
| return -EAGAIN; |
| } |
| start += PAGE_SIZE; |
| pos += PAGE_SIZE; |
| size -= PAGE_SIZE; |
| } |
| |
| vma->vm_ops = &zc0301_vm_ops; |
| vma->vm_private_data = &cam->frame[i]; |
| |
| zc0301_vm_open(vma); |
| |
| mutex_unlock(&cam->fileop_mutex); |
| |
| return 0; |
| } |
| |
| /*****************************************************************************/ |
| |
| static int |
| zc0301_vidioc_querycap(struct zc0301_device* cam, void __user * arg) |
| { |
| struct v4l2_capability cap = { |
| .driver = "zc0301", |
| .version = ZC0301_MODULE_VERSION_CODE, |
| .capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE | |
| V4L2_CAP_STREAMING, |
| }; |
| |
| strlcpy(cap.card, cam->v4ldev->name, sizeof(cap.card)); |
| if (usb_make_path(cam->usbdev, cap.bus_info, sizeof(cap.bus_info)) < 0) |
| strlcpy(cap.bus_info, cam->usbdev->dev.bus_id, |
| sizeof(cap.bus_info)); |
| |
| if (copy_to_user(arg, &cap, sizeof(cap))) |
| return -EFAULT; |
| |
| return 0; |
| } |
| |
| |
| static int |
| zc0301_vidioc_enuminput(struct zc0301_device* cam, void __user * arg) |
| { |
| struct v4l2_input i; |
| |
| if (copy_from_user(&i, arg, sizeof(i))) |
| return -EFAULT; |
| |
| if (i.index) |
| return -EINVAL; |
| |
| memset(&i, 0, sizeof(i)); |
| strcpy(i.name, "Camera"); |
| i.type = V4L2_INPUT_TYPE_CAMERA; |
| |
| if (copy_to_user(arg, &i, sizeof(i))) |
| return -EFAULT; |
| |
| return 0; |
| } |
| |
| |
| static int |
| zc0301_vidioc_g_input(struct zc0301_device* cam, void __user * arg) |
| { |
| int index = 0; |
| |
| if (copy_to_user(arg, &index, sizeof(index))) |
| return -EFAULT; |
| |
| return 0; |
| } |
| |
| |
| static int |
| zc0301_vidioc_s_input(struct zc0301_device* cam, void __user * arg) |
| { |
| int index; |
| |
| if (copy_from_user(&index, arg, sizeof(index))) |
| return -EFAULT; |
| |
| if (index != 0) |
| return -EINVAL; |
| |
| return 0; |
| } |
| |
| |
| static int |
| zc0301_vidioc_query_ctrl(struct zc0301_device* cam, void __user * arg) |
| { |
| struct zc0301_sensor* s = &cam->sensor; |
| struct v4l2_queryctrl qc; |
| u8 i; |
| |
| if (copy_from_user(&qc, arg, sizeof(qc))) |
| return -EFAULT; |
| |
| for (i = 0; i < ARRAY_SIZE(s->qctrl); i++) |
| if (qc.id && qc.id == s->qctrl[i].id) { |
| memcpy(&qc, &(s->qctrl[i]), sizeof(qc)); |
| if (copy_to_user(arg, &qc, sizeof(qc))) |
| return -EFAULT; |
| return 0; |
| } |
| |
| return -EINVAL; |
| } |
| |
| |
| static int |
| zc0301_vidioc_g_ctrl(struct zc0301_device* cam, void __user * arg) |
| { |
| struct zc0301_sensor* s = &cam->sensor; |
| struct v4l2_control ctrl; |
| int err = 0; |
| u8 i; |
| |
| if (!s->get_ctrl && !s->set_ctrl) |
| return -EINVAL; |
| |
| if (copy_from_user(&ctrl, arg, sizeof(ctrl))) |
| return -EFAULT; |
| |
| if (!s->get_ctrl) { |
| for (i = 0; i < ARRAY_SIZE(s->qctrl); i++) |
| if (ctrl.id == s->qctrl[i].id) { |
| ctrl.value = s->_qctrl[i].default_value; |
| goto exit; |
| } |
| return -EINVAL; |
| } else |
| err = s->get_ctrl(cam, &ctrl); |
| |
| exit: |
| if (copy_to_user(arg, &ctrl, sizeof(ctrl))) |
| return -EFAULT; |
| |
| return err; |
| } |
| |
| |
| static int |
| zc0301_vidioc_s_ctrl(struct zc0301_device* cam, void __user * arg) |
| { |
| struct zc0301_sensor* s = &cam->sensor; |
| struct v4l2_control ctrl; |
| u8 i; |
| int err = 0; |
| |
| if (!s->set_ctrl) |
| return -EINVAL; |
| |
| if (copy_from_user(&ctrl, arg, sizeof(ctrl))) |
| return -EFAULT; |
| |
| for (i = 0; i < ARRAY_SIZE(s->qctrl); i++) |
| if (ctrl.id == s->qctrl[i].id) { |
| if (s->qctrl[i].flags & V4L2_CTRL_FLAG_DISABLED) |
| return -EINVAL; |
| if (ctrl.value < s->qctrl[i].minimum || |
| ctrl.value > s->qctrl[i].maximum) |
| return -ERANGE; |
| ctrl.value -= ctrl.value % s->qctrl[i].step; |
| break; |
| } |
| |
| if ((err = s->set_ctrl(cam, &ctrl))) |
| return err; |
| |
| s->_qctrl[i].default_value = ctrl.value; |
| |
| return 0; |
| } |
| |
| |
| static int |
| zc0301_vidioc_cropcap(struct zc0301_device* cam, void __user * arg) |
| { |
| struct v4l2_cropcap* cc = &(cam->sensor.cropcap); |
| |
| cc->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
| cc->pixelaspect.numerator = 1; |
| cc->pixelaspect.denominator = 1; |
| |
| if (copy_to_user(arg, cc, sizeof(*cc))) |
| return -EFAULT; |
| |
| return 0; |
| } |
| |
| |
| static int |
| zc0301_vidioc_g_crop(struct zc0301_device* cam, void __user * arg) |
| { |
| struct zc0301_sensor* s = &cam->sensor; |
| struct v4l2_crop crop = { |
| .type = V4L2_BUF_TYPE_VIDEO_CAPTURE, |
| }; |
| |
| memcpy(&(crop.c), &(s->_rect), sizeof(struct v4l2_rect)); |
| |
| if (copy_to_user(arg, &crop, sizeof(crop))) |
| return -EFAULT; |
| |
| return 0; |
| } |
| |
| |
| static int |
| zc0301_vidioc_s_crop(struct zc0301_device* cam, void __user * arg) |
| { |
| struct zc0301_sensor* s = &cam->sensor; |
| struct v4l2_crop crop; |
| struct v4l2_rect* rect; |
| struct v4l2_rect* bounds = &(s->cropcap.bounds); |
| const enum zc0301_stream_state stream = cam->stream; |
| const u32 nbuffers = cam->nbuffers; |
| u32 i; |
| int err = 0; |
| |
| if (copy_from_user(&crop, arg, sizeof(crop))) |
| return -EFAULT; |
| |
| rect = &(crop.c); |
| |
| if (crop.type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
| return -EINVAL; |
| |
| if (cam->module_param.force_munmap) |
| for (i = 0; i < cam->nbuffers; i++) |
| if (cam->frame[i].vma_use_count) { |
| DBG(3, "VIDIOC_S_CROP failed. " |
| "Unmap the buffers first."); |
| return -EINVAL; |
| } |
| |
| if (!s->set_crop) { |
| memcpy(rect, &(s->_rect), sizeof(*rect)); |
| if (copy_to_user(arg, &crop, sizeof(crop))) |
| return -EFAULT; |
| return 0; |
| } |
| |
| rect->left &= ~7L; |
| rect->top &= ~7L; |
| if (rect->width < 8) |
| rect->width = 8; |
| if (rect->height < 8) |
| rect->height = 8; |
| if (rect->width > bounds->width) |
| rect->width = bounds->width; |
| if (rect->height > bounds->height) |
| rect->height = bounds->height; |
| if (rect->left < bounds->left) |
| rect->left = bounds->left; |
| if (rect->top < bounds->top) |
| rect->top = bounds->top; |
| if (rect->left + rect->width > bounds->left + bounds->width) |
| rect->left = bounds->left+bounds->width - rect->width; |
| if (rect->top + rect->height > bounds->top + bounds->height) |
| rect->top = bounds->top+bounds->height - rect->height; |
| rect->width &= ~7L; |
| rect->height &= ~7L; |
| |
| if (cam->stream == STREAM_ON) |
| if ((err = zc0301_stream_interrupt(cam))) |
| return err; |
| |
| if (copy_to_user(arg, &crop, sizeof(crop))) { |
| cam->stream = stream; |
| return -EFAULT; |
| } |
| |
| if (cam->module_param.force_munmap || cam->io == IO_READ) |
| zc0301_release_buffers(cam); |
| |
| if (s->set_crop) |
| err += s->set_crop(cam, rect); |
| |
| if (err) { /* atomic, no rollback in ioctl() */ |
| cam->state |= DEV_MISCONFIGURED; |
| DBG(1, "VIDIOC_S_CROP failed because of hardware problems. To " |
| "use the camera, close and open /dev/video%d again.", |
| cam->v4ldev->minor); |
| return -EIO; |
| } |
| |
| s->pix_format.width = rect->width; |
| s->pix_format.height = rect->height; |
| memcpy(&(s->_rect), rect, sizeof(*rect)); |
| |
| if ((cam->module_param.force_munmap || cam->io == IO_READ) && |
| nbuffers != zc0301_request_buffers(cam, nbuffers, cam->io)) { |
| cam->state |= DEV_MISCONFIGURED; |
| DBG(1, "VIDIOC_S_CROP failed because of not enough memory. To " |
| "use the camera, close and open /dev/video%d again.", |
| cam->v4ldev->minor); |
| return -ENOMEM; |
| } |
| |
| if (cam->io == IO_READ) |
| zc0301_empty_framequeues(cam); |
| else if (cam->module_param.force_munmap) |
| zc0301_requeue_outqueue(cam); |
| |
| cam->stream = stream; |
| |
| return 0; |
| } |
| |
| |
| static int |
| zc0301_vidioc_enum_fmt(struct zc0301_device* cam, void __user * arg) |
| { |
| struct v4l2_fmtdesc fmtd; |
| |
| if (copy_from_user(&fmtd, arg, sizeof(fmtd))) |
| return -EFAULT; |
| |
| if (fmtd.index == 0) { |
| strcpy(fmtd.description, "JPEG"); |
| fmtd.pixelformat = V4L2_PIX_FMT_JPEG; |
| fmtd.flags = V4L2_FMT_FLAG_COMPRESSED; |
| } else |
| return -EINVAL; |
| |
| fmtd.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
| memset(&fmtd.reserved, 0, sizeof(fmtd.reserved)); |
| |
| if (copy_to_user(arg, &fmtd, sizeof(fmtd))) |
| return -EFAULT; |
| |
| return 0; |
| } |
| |
| |
| static int |
| zc0301_vidioc_g_fmt(struct zc0301_device* cam, void __user * arg) |
| { |
| struct v4l2_format format; |
| struct v4l2_pix_format* pfmt = &(cam->sensor.pix_format); |
| |
| if (copy_from_user(&format, arg, sizeof(format))) |
| return -EFAULT; |
| |
| if (format.type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
| return -EINVAL; |
| |
| pfmt->bytesperline = 0; |
| pfmt->sizeimage = pfmt->height * ((pfmt->width*pfmt->priv)/8); |
| pfmt->field = V4L2_FIELD_NONE; |
| memcpy(&(format.fmt.pix), pfmt, sizeof(*pfmt)); |
| |
| if (copy_to_user(arg, &format, sizeof(format))) |
| return -EFAULT; |
| |
| return 0; |
| } |
| |
| |
| static int |
| zc0301_vidioc_try_s_fmt(struct zc0301_device* cam, unsigned int cmd, |
| void __user * arg) |
| { |
| struct zc0301_sensor* s = &cam->sensor; |
| struct v4l2_format format; |
| struct v4l2_pix_format* pix; |
| struct v4l2_pix_format* pfmt = &(s->pix_format); |
| struct v4l2_rect* bounds = &(s->cropcap.bounds); |
| struct v4l2_rect rect; |
| const enum zc0301_stream_state stream = cam->stream; |
| const u32 nbuffers = cam->nbuffers; |
| u32 i; |
| int err = 0; |
| |
| if (copy_from_user(&format, arg, sizeof(format))) |
| return -EFAULT; |
| |
| pix = &(format.fmt.pix); |
| |
| if (format.type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
| return -EINVAL; |
| |
| memcpy(&rect, &(s->_rect), sizeof(rect)); |
| |
| if (!s->set_crop) { |
| pix->width = rect.width; |
| pix->height = rect.height; |
| } else { |
| rect.width = pix->width; |
| rect.height = pix->height; |
| } |
| |
| if (rect.width < 8) |
| rect.width = 8; |
| if (rect.height < 8) |
| rect.height = 8; |
| if (rect.width > bounds->left + bounds->width - rect.left) |
| rect.width = bounds->left + bounds->width - rect.left; |
| if (rect.height > bounds->top + bounds->height - rect.top) |
| rect.height = bounds->top + bounds->height - rect.top; |
| rect.width &= ~7L; |
| rect.height &= ~7L; |
| |
| pix->width = rect.width; |
| pix->height = rect.height; |
| pix->pixelformat = pfmt->pixelformat; |
| pix->priv = pfmt->priv; |
| pix->colorspace = pfmt->colorspace; |
| pix->bytesperline = 0; |
| pix->sizeimage = pix->height * ((pix->width * pix->priv) / 8); |
| pix->field = V4L2_FIELD_NONE; |
| |
| if (cmd == VIDIOC_TRY_FMT) { |
| if (copy_to_user(arg, &format, sizeof(format))) |
| return -EFAULT; |
| return 0; |
| } |
| |
| if (cam->module_param.force_munmap) |
| for (i = 0; i < cam->nbuffers; i++) |
| if (cam->frame[i].vma_use_count) { |
| DBG(3, "VIDIOC_S_FMT failed. " |
| "Unmap the buffers first."); |
| return -EINVAL; |
| } |
| |
| if (cam->stream == STREAM_ON) |
| if ((err = zc0301_stream_interrupt(cam))) |
| return err; |
| |
| if (copy_to_user(arg, &format, sizeof(format))) { |
| cam->stream = stream; |
| return -EFAULT; |
| } |
| |
| if (cam->module_param.force_munmap || cam->io == IO_READ) |
| zc0301_release_buffers(cam); |
| |
| if (s->set_crop) |
| err += s->set_crop(cam, &rect); |
| |
| if (err) { /* atomic, no rollback in ioctl() */ |
| cam->state |= DEV_MISCONFIGURED; |
| DBG(1, "VIDIOC_S_FMT failed because of hardware problems. To " |
| "use the camera, close and open /dev/video%d again.", |
| cam->v4ldev->minor); |
| return -EIO; |
| } |
| |
| memcpy(pfmt, pix, sizeof(*pix)); |
| memcpy(&(s->_rect), &rect, sizeof(rect)); |
| |
| if ((cam->module_param.force_munmap || cam->io == IO_READ) && |
| nbuffers != zc0301_request_buffers(cam, nbuffers, cam->io)) { |
| cam->state |= DEV_MISCONFIGURED; |
| DBG(1, "VIDIOC_S_FMT failed because of not enough memory. To " |
| "use the camera, close and open /dev/video%d again.", |
| cam->v4ldev->minor); |
| return -ENOMEM; |
| } |
| |
| if (cam->io == IO_READ) |
| zc0301_empty_framequeues(cam); |
| else if (cam->module_param.force_munmap) |
| zc0301_requeue_outqueue(cam); |
| |
| cam->stream = stream; |
| |
| return 0; |
| } |
| |
| |
| static int |
| zc0301_vidioc_g_jpegcomp(struct zc0301_device* cam, void __user * arg) |
| { |
| if (copy_to_user(arg, &cam->compression, sizeof(cam->compression))) |
| return -EFAULT; |
| |
| return 0; |
| } |
| |
| |
| static int |
| zc0301_vidioc_s_jpegcomp(struct zc0301_device* cam, void __user * arg) |
| { |
| struct v4l2_jpegcompression jc; |
| const enum zc0301_stream_state stream = cam->stream; |
| int err = 0; |
| |
| if (copy_from_user(&jc, arg, sizeof(jc))) |
| return -EFAULT; |
| |
| if (jc.quality != 0) |
| return -EINVAL; |
| |
| if (cam->stream == STREAM_ON) |
| if ((err = zc0301_stream_interrupt(cam))) |
| return err; |
| |
| err += zc0301_set_compression(cam, &jc); |
| if (err) { /* atomic, no rollback in ioctl() */ |
| cam->state |= DEV_MISCONFIGURED; |
| DBG(1, "VIDIOC_S_JPEGCOMP failed because of hardware " |
| "problems. To use the camera, close and open " |
| "/dev/video%d again.", cam->v4ldev->minor); |
| return -EIO; |
| } |
| |
| cam->compression.quality = jc.quality; |
| |
| cam->stream = stream; |
| |
| return 0; |
| } |
| |
| |
| static int |
| zc0301_vidioc_reqbufs(struct zc0301_device* cam, void __user * arg) |
| { |
| struct v4l2_requestbuffers rb; |
| u32 i; |
| int err; |
| |
| if (copy_from_user(&rb, arg, sizeof(rb))) |
| return -EFAULT; |
| |
| if (rb.type != V4L2_BUF_TYPE_VIDEO_CAPTURE || |
| rb.memory != V4L2_MEMORY_MMAP) |
| return -EINVAL; |
| |
| if (cam->io == IO_READ) { |
| DBG(3, "Close and open the device again to choose the mmap " |
| "I/O method"); |
| return -EINVAL; |
| } |
| |
| for (i = 0; i < cam->nbuffers; i++) |
| if (cam->frame[i].vma_use_count) { |
| DBG(3, "VIDIOC_REQBUFS failed. " |
| "Previous buffers are still mapped."); |
| return -EINVAL; |
| } |
| |
| if (cam->stream == STREAM_ON) |
| if ((err = zc0301_stream_interrupt(cam))) |
| return err; |
| |
| zc0301_empty_framequeues(cam); |
| |
| zc0301_release_buffers(cam); |
| if (rb.count) |
| rb.count = zc0301_request_buffers(cam, rb.count, IO_MMAP); |
| |
| if (copy_to_user(arg, &rb, sizeof(rb))) { |
| zc0301_release_buffers(cam); |
| cam->io = IO_NONE; |
| return -EFAULT; |
| } |
| |
| cam->io = rb.count ? IO_MMAP : IO_NONE; |
| |
| return 0; |
| } |
| |
| |
| static int |
| zc0301_vidioc_querybuf(struct zc0301_device* cam, void __user * arg) |
| { |
| struct v4l2_buffer b; |
| |
| if (copy_from_user(&b, arg, sizeof(b))) |
| return -EFAULT; |
| |
| if (b.type != V4L2_BUF_TYPE_VIDEO_CAPTURE || |
| b.index >= cam->nbuffers || cam->io != IO_MMAP) |
| return -EINVAL; |
| |
| memcpy(&b, &cam->frame[b.index].buf, sizeof(b)); |
| |
| if (cam->frame[b.index].vma_use_count) |
| b.flags |= V4L2_BUF_FLAG_MAPPED; |
| |
| if (cam->frame[b.index].state == F_DONE) |
| b.flags |= V4L2_BUF_FLAG_DONE; |
| else if (cam->frame[b.index].state != F_UNUSED) |
| b.flags |= V4L2_BUF_FLAG_QUEUED; |
| |
| if (copy_to_user(arg, &b, sizeof(b))) |
| return -EFAULT; |
| |
| return 0; |
| } |
| |
| |
| static int |
| zc0301_vidioc_qbuf(struct zc0301_device* cam, void __user * arg) |
| { |
| struct v4l2_buffer b; |
| unsigned long lock_flags; |
| |
| if (copy_from_user(&b, arg, sizeof(b))) |
| return -EFAULT; |
| |
| if (b.type != V4L2_BUF_TYPE_VIDEO_CAPTURE || |
| b.index >= cam->nbuffers || cam->io != IO_MMAP) |
| return -EINVAL; |
| |
| if (cam->frame[b.index].state != F_UNUSED) |
| return -EINVAL; |
| |
| cam->frame[b.index].state = F_QUEUED; |
| |
| spin_lock_irqsave(&cam->queue_lock, lock_flags); |
| list_add_tail(&cam->frame[b.index].frame, &cam->inqueue); |
| spin_unlock_irqrestore(&cam->queue_lock, lock_flags); |
| |
| PDBGG("Frame #%lu queued", (unsigned long)b.index); |
| |
| return 0; |
| } |
| |
| |
| static int |
| zc0301_vidioc_dqbuf(struct zc0301_device* cam, struct file* filp, |
| void __user * arg) |
| { |
| struct v4l2_buffer b; |
| struct zc0301_frame_t *f; |
| unsigned long lock_flags; |
| long timeout; |
| |
| if (copy_from_user(&b, arg, sizeof(b))) |
| return -EFAULT; |
| |
| if (b.type != V4L2_BUF_TYPE_VIDEO_CAPTURE || cam->io!= IO_MMAP) |
| return -EINVAL; |
| |
| if (list_empty(&cam->outqueue)) { |
| if (cam->stream == STREAM_OFF) |
| return -EINVAL; |
| if (filp->f_flags & O_NONBLOCK) |
| return -EAGAIN; |
| timeout = wait_event_interruptible_timeout |
| ( cam->wait_frame, |
| (!list_empty(&cam->outqueue)) || |
| (cam->state & DEV_DISCONNECTED) || |
| (cam->state & DEV_MISCONFIGURED), |
| cam->module_param.frame_timeout * |
| 1000 * msecs_to_jiffies(1) ); |
| if (timeout < 0) |
| return timeout; |
| if (cam->state & DEV_DISCONNECTED) |
| return -ENODEV; |
| if (!timeout || (cam->state & DEV_MISCONFIGURED)) |
| return -EIO; |
| } |
| |
| spin_lock_irqsave(&cam->queue_lock, lock_flags); |
| f = list_entry(cam->outqueue.next, struct zc0301_frame_t, frame); |
| list_del(cam->outqueue.next); |
| spin_unlock_irqrestore(&cam->queue_lock, lock_flags); |
| |
| f->state = F_UNUSED; |
| |
| memcpy(&b, &f->buf, sizeof(b)); |
| if (f->vma_use_count) |
| b.flags |= V4L2_BUF_FLAG_MAPPED; |
| |
| if (copy_to_user(arg, &b, sizeof(b))) |
| return -EFAULT; |
| |
| PDBGG("Frame #%lu dequeued", (unsigned long)f->buf.index); |
| |
| return 0; |
| } |
| |
| |
| static int |
| zc0301_vidioc_streamon(struct zc0301_device* cam, void __user * arg) |
| { |
| int type; |
| |
| if (copy_from_user(&type, arg, sizeof(type))) |
| return -EFAULT; |
| |
| if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE || cam->io != IO_MMAP) |
| return -EINVAL; |
| |
| if (list_empty(&cam->inqueue)) |
| return -EINVAL; |
| |
| cam->stream = STREAM_ON; |
| |
| DBG(3, "Stream on"); |
| |
| return 0; |
| } |
| |
| |
| static int |
| zc0301_vidioc_streamoff(struct zc0301_device* cam, void __user * arg) |
| { |
| int type, err; |
| |
| if (copy_from_user(&type, arg, sizeof(type))) |
| return -EFAULT; |
| |
| if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE || cam->io != IO_MMAP) |
| return -EINVAL; |
| |
| if (cam->stream == STREAM_ON) |
| if ((err = zc0301_stream_interrupt(cam))) |
| return err; |
| |
| zc0301_empty_framequeues(cam); |
| |
| DBG(3, "Stream off"); |
| |
| return 0; |
| } |
| |
| |
| static int |
| zc0301_vidioc_g_parm(struct zc0301_device* cam, void __user * arg) |
| { |
| struct v4l2_streamparm sp; |
| |
| if (copy_from_user(&sp, arg, sizeof(sp))) |
| return -EFAULT; |
| |
| if (sp.type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
| return -EINVAL; |
| |
| sp.parm.capture.extendedmode = 0; |
| sp.parm.capture.readbuffers = cam->nreadbuffers; |
| |
| if (copy_to_user(arg, &sp, sizeof(sp))) |
| return -EFAULT; |
| |
| return 0; |
| } |
| |
| |
| static int |
| zc0301_vidioc_s_parm(struct zc0301_device* cam, void __user * arg) |
| { |
| struct v4l2_streamparm sp; |
| |
| if (copy_from_user(&sp, arg, sizeof(sp))) |
| return -EFAULT; |
| |
| if (sp.type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
| return -EINVAL; |
| |
| sp.parm.capture.extendedmode = 0; |
| |
| if (sp.parm.capture.readbuffers == 0) |
| sp.parm.capture.readbuffers = cam->nreadbuffers; |
| |
| if (sp.parm.capture.readbuffers > ZC0301_MAX_FRAMES) |
| sp.parm.capture.readbuffers = ZC0301_MAX_FRAMES; |
| |
| if (copy_to_user(arg, &sp, sizeof(sp))) |
| return -EFAULT; |
| |
| cam->nreadbuffers = sp.parm.capture.readbuffers; |
| |
| return 0; |
| } |
| |
| |
| static int zc0301_ioctl_v4l2(struct inode* inode, struct file* filp, |
| unsigned int cmd, void __user * arg) |
| { |
| struct zc0301_device* cam = video_get_drvdata(video_devdata(filp)); |
| |
| switch (cmd) { |
| |
| case VIDIOC_QUERYCAP: |
| return zc0301_vidioc_querycap(cam, arg); |
| |
| case VIDIOC_ENUMINPUT: |
| return zc0301_vidioc_enuminput(cam, arg); |
| |
| case VIDIOC_G_INPUT: |
| return zc0301_vidioc_g_input(cam, arg); |
| |
| case VIDIOC_S_INPUT: |
| return zc0301_vidioc_s_input(cam, arg); |
| |
| case VIDIOC_QUERYCTRL: |
| return zc0301_vidioc_query_ctrl(cam, arg); |
| |
| case VIDIOC_G_CTRL: |
| return zc0301_vidioc_g_ctrl(cam, arg); |
| |
| case VIDIOC_S_CTRL: |
| return zc0301_vidioc_s_ctrl(cam, arg); |
| |
| case VIDIOC_CROPCAP: |
| return zc0301_vidioc_cropcap(cam, arg); |
| |
| case VIDIOC_G_CROP: |
| return zc0301_vidioc_g_crop(cam, arg); |
| |
| case VIDIOC_S_CROP: |
| return zc0301_vidioc_s_crop(cam, arg); |
| |
| case VIDIOC_ENUM_FMT: |
| return zc0301_vidioc_enum_fmt(cam, arg); |
| |
| case VIDIOC_G_FMT: |
| return zc0301_vidioc_g_fmt(cam, arg); |
| |
| case VIDIOC_TRY_FMT: |
| case VIDIOC_S_FMT: |
| return zc0301_vidioc_try_s_fmt(cam, cmd, arg); |
| |
| case VIDIOC_G_JPEGCOMP: |
| return zc0301_vidioc_g_jpegcomp(cam, arg); |
| |
| case VIDIOC_S_JPEGCOMP: |
| return zc0301_vidioc_s_jpegcomp(cam, arg); |
| |
| case VIDIOC_REQBUFS: |
| return zc0301_vidioc_reqbufs(cam, arg); |
| |
| case VIDIOC_QUERYBUF: |
| return zc0301_vidioc_querybuf(cam, arg); |
| |
| case VIDIOC_QBUF: |
| return zc0301_vidioc_qbuf(cam, arg); |
| |
| case VIDIOC_DQBUF: |
| return zc0301_vidioc_dqbuf(cam, filp, arg); |
| |
| case VIDIOC_STREAMON: |
| return zc0301_vidioc_streamon(cam, arg); |
| |
| case VIDIOC_STREAMOFF: |
| return zc0301_vidioc_streamoff(cam, arg); |
| |
| case VIDIOC_G_PARM: |
| return zc0301_vidioc_g_parm(cam, arg); |
| |
| case VIDIOC_S_PARM: |
| return zc0301_vidioc_s_parm(cam, arg); |
| |
| case VIDIOC_G_STD: |
| case VIDIOC_S_STD: |
| case VIDIOC_QUERYSTD: |
| case VIDIOC_ENUMSTD: |
| case VIDIOC_QUERYMENU: |
| return -EINVAL; |
| |
| default: |
| return -EINVAL; |
| |
| } |
| } |
| |
| |
| static int zc0301_ioctl(struct inode* inode, struct file* filp, |
| unsigned int cmd, unsigned long arg) |
| { |
| struct zc0301_device* cam = video_get_drvdata(video_devdata(filp)); |
| int err = 0; |
| |
| if (mutex_lock_interruptible(&cam->fileop_mutex)) |
| return -ERESTARTSYS; |
| |
| if (cam->state & DEV_DISCONNECTED) { |
| DBG(1, "Device not present"); |
| mutex_unlock(&cam->fileop_mutex); |
| return -ENODEV; |
| } |
| |
| if (cam->state & DEV_MISCONFIGURED) { |
| DBG(1, "The camera is misconfigured. Close and open it " |
| "again."); |
| mutex_unlock(&cam->fileop_mutex); |
| return -EIO; |
| } |
| |
| V4LDBG(3, "zc0301", cmd); |
| |
| err = zc0301_ioctl_v4l2(inode, filp, cmd, (void __user *)arg); |
| |
| mutex_unlock(&cam->fileop_mutex); |
| |
| return err; |
| } |
| |
| |
| static struct file_operations zc0301_fops = { |
| .owner = THIS_MODULE, |
| .open = zc0301_open, |
| .release = zc0301_release, |
| .ioctl = zc0301_ioctl, |
| .read = zc0301_read, |
| .poll = zc0301_poll, |
| .mmap = zc0301_mmap, |
| .llseek = no_llseek, |
| }; |
| |
| /*****************************************************************************/ |
| |
| static int |
| zc0301_usb_probe(struct usb_interface* intf, const struct usb_device_id* id) |
| { |
| struct usb_device *udev = interface_to_usbdev(intf); |
| struct zc0301_device* cam; |
| static unsigned int dev_nr = 0; |
| unsigned int i; |
| int err = 0; |
| |
| if (!(cam = kzalloc(sizeof(struct zc0301_device), GFP_KERNEL))) |
| return -ENOMEM; |
| |
| cam->usbdev = udev; |
| |
| if (!(cam->control_buffer = kzalloc(4, GFP_KERNEL))) { |
| DBG(1, "kmalloc() failed"); |
| err = -ENOMEM; |
| goto fail; |
| } |
| |
| if (!(cam->v4ldev = video_device_alloc())) { |
| DBG(1, "video_device_alloc() failed"); |
| err = -ENOMEM; |
| goto fail; |
| } |
| |
| mutex_init(&cam->dev_mutex); |
| |
| DBG(2, "ZC0301[P] Image Processor and Control Chip detected " |
| "(vid/pid 0x%04X/0x%04X)",id->idVendor, id->idProduct); |
| |
| for (i = 0; zc0301_sensor_table[i]; i++) { |
| err = zc0301_sensor_table[i](cam); |
| if (!err) |
| break; |
| } |
| |
| if (!err) |
| DBG(2, "%s image sensor detected", cam->sensor.name); |
| else { |
| DBG(1, "No supported image sensor detected"); |
| err = -ENODEV; |
| goto fail; |
| } |
| |
| if (zc0301_init(cam)) { |
| DBG(1, "Initialization failed. I will retry on open()."); |
| cam->state |= DEV_MISCONFIGURED; |
| } |
| |
| strcpy(cam->v4ldev->name, "ZC0301[P] PC Camera"); |
| cam->v4ldev->owner = THIS_MODULE; |
| cam->v4ldev->type = VID_TYPE_CAPTURE | VID_TYPE_SCALES; |
| cam->v4ldev->hardware = 0; |
| cam->v4ldev->fops = &zc0301_fops; |
| cam->v4ldev->minor = video_nr[dev_nr]; |
| cam->v4ldev->release = video_device_release; |
| video_set_drvdata(cam->v4ldev, cam); |
| |
| mutex_lock(&cam->dev_mutex); |
| |
| err = video_register_device(cam->v4ldev, VFL_TYPE_GRABBER, |
| video_nr[dev_nr]); |
| if (err) { |
| DBG(1, "V4L2 device registration failed"); |
| if (err == -ENFILE && video_nr[dev_nr] == -1) |
| DBG(1, "Free /dev/videoX node not found"); |
| video_nr[dev_nr] = -1; |
| dev_nr = (dev_nr < ZC0301_MAX_DEVICES-1) ? dev_nr+1 : 0; |
| mutex_unlock(&cam->dev_mutex); |
| goto fail; |
| } |
| |
| DBG(2, "V4L2 device registered as /dev/video%d", cam->v4ldev->minor); |
| |
| cam->module_param.force_munmap = force_munmap[dev_nr]; |
| cam->module_param.frame_timeout = frame_timeout[dev_nr]; |
| |
| dev_nr = (dev_nr < ZC0301_MAX_DEVICES-1) ? dev_nr+1 : 0; |
| |
| usb_set_intfdata(intf, cam); |
| |
| mutex_unlock(&cam->dev_mutex); |
| |
| return 0; |
| |
| fail: |
| if (cam) { |
| kfree(cam->control_buffer); |
| if (cam->v4ldev) |
| video_device_release(cam->v4ldev); |
| kfree(cam); |
| } |
| return err; |
| } |
| |
| |
| static void zc0301_usb_disconnect(struct usb_interface* intf) |
| { |
| struct zc0301_device* cam = usb_get_intfdata(intf); |
| |
| if (!cam) |
| return; |
| |
| down_write(&zc0301_disconnect); |
| |
| mutex_lock(&cam->dev_mutex); |
| |
| DBG(2, "Disconnecting %s...", cam->v4ldev->name); |
| |
| wake_up_interruptible_all(&cam->open); |
| |
| if (cam->users) { |
| DBG(2, "Device /dev/video%d is open! Deregistration and " |
| "memory deallocation are deferred on close.", |
| cam->v4ldev->minor); |
| cam->state |= DEV_MISCONFIGURED; |
| zc0301_stop_transfer(cam); |
| cam->state |= DEV_DISCONNECTED; |
| wake_up_interruptible(&cam->wait_frame); |
| wake_up(&cam->wait_stream); |
| usb_get_dev(cam->usbdev); |
| } else { |
| cam->state |= DEV_DISCONNECTED; |
| zc0301_release_resources(cam); |
| } |
| |
| mutex_unlock(&cam->dev_mutex); |
| |
| if (!cam->users) |
| kfree(cam); |
| |
| up_write(&zc0301_disconnect); |
| } |
| |
| |
| static struct usb_driver zc0301_usb_driver = { |
| .name = "zc0301", |
| .id_table = zc0301_id_table, |
| .probe = zc0301_usb_probe, |
| .disconnect = zc0301_usb_disconnect, |
| }; |
| |
| /*****************************************************************************/ |
| |
| static int __init zc0301_module_init(void) |
| { |
| int err = 0; |
| |
| KDBG(2, ZC0301_MODULE_NAME " v" ZC0301_MODULE_VERSION); |
| KDBG(3, ZC0301_MODULE_AUTHOR); |
| |
| if ((err = usb_register(&zc0301_usb_driver))) |
| KDBG(1, "usb_register() failed"); |
| |
| return err; |
| } |
| |
| |
| static void __exit zc0301_module_exit(void) |
| { |
| usb_deregister(&zc0301_usb_driver); |
| } |
| |
| |
| module_init(zc0301_module_init); |
| module_exit(zc0301_module_exit); |