diff options
Diffstat (limited to 'drivers/media/video/cpia2/cpia2_v4l.c')
| -rw-r--r-- | drivers/media/video/cpia2/cpia2_v4l.c | 1578 |
1 files changed, 1578 insertions, 0 deletions
diff --git a/drivers/media/video/cpia2/cpia2_v4l.c b/drivers/media/video/cpia2/cpia2_v4l.c new file mode 100644 index 00000000..077eb1db --- /dev/null +++ b/drivers/media/video/cpia2/cpia2_v4l.c @@ -0,0 +1,1578 @@ +/**************************************************************************** + * + * Filename: cpia2_v4l.c + * + * Copyright 2001, STMicrolectronics, Inc. + * Contact: steve.miller@st.com + * Copyright 2001,2005, Scott J. Bertin <scottbertin@yahoo.com> + * + * Description: + * This is a USB driver for CPia2 based video cameras. + * The infrastructure of this driver is based on the cpia usb driver by + * Jochen Scharrlach and Johannes Erdfeldt. + * + * 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. + * + * Stripped of 2.4 stuff ready for main kernel submit by + * Alan Cox <alan@lxorguk.ukuu.org.uk> + ****************************************************************************/ + +#define CPIA_VERSION "3.0.1" + +#include <linux/module.h> +#include <linux/time.h> +#include <linux/sched.h> +#include <linux/slab.h> +#include <linux/init.h> +#include <linux/videodev2.h> +#include <linux/stringify.h> +#include <media/v4l2-ioctl.h> + +#include "cpia2.h" +#include "cpia2dev.h" + +static int video_nr = -1; +module_param(video_nr, int, 0); +MODULE_PARM_DESC(video_nr,"video device to register (0=/dev/video0, etc)"); + +static int buffer_size = 68*1024; +module_param(buffer_size, int, 0); +MODULE_PARM_DESC(buffer_size, "Size for each frame buffer in bytes (default 68k)"); + +static int num_buffers = 3; +module_param(num_buffers, int, 0); +MODULE_PARM_DESC(num_buffers, "Number of frame buffers (1-" + __stringify(VIDEO_MAX_FRAME) ", default 3)"); + +static int alternate = DEFAULT_ALT; +module_param(alternate, int, 0); +MODULE_PARM_DESC(alternate, "USB Alternate (" __stringify(USBIF_ISO_1) "-" + __stringify(USBIF_ISO_6) ", default " + __stringify(DEFAULT_ALT) ")"); + +static int flicker_freq = 60; +module_param(flicker_freq, int, 0); +MODULE_PARM_DESC(flicker_freq, "Flicker frequency (" __stringify(50) "or" + __stringify(60) ", default " + __stringify(60) ")"); + +static int flicker_mode = NEVER_FLICKER; +module_param(flicker_mode, int, 0); +MODULE_PARM_DESC(flicker_mode, + "Flicker supression (" __stringify(NEVER_FLICKER) "or" + __stringify(ANTI_FLICKER_ON) ", default " + __stringify(NEVER_FLICKER) ")"); + +MODULE_AUTHOR("Steve Miller (STMicroelectronics) <steve.miller@st.com>"); +MODULE_DESCRIPTION("V4L-driver for STMicroelectronics CPiA2 based cameras"); +MODULE_SUPPORTED_DEVICE("video"); +MODULE_LICENSE("GPL"); +MODULE_VERSION(CPIA_VERSION); + +#define ABOUT "V4L-Driver for Vision CPiA2 based cameras" + +struct control_menu_info { + int value; + char name[32]; +}; + +static struct control_menu_info framerate_controls[] = +{ + { CPIA2_VP_FRAMERATE_6_25, "6.25 fps" }, + { CPIA2_VP_FRAMERATE_7_5, "7.5 fps" }, + { CPIA2_VP_FRAMERATE_12_5, "12.5 fps" }, + { CPIA2_VP_FRAMERATE_15, "15 fps" }, + { CPIA2_VP_FRAMERATE_25, "25 fps" }, + { CPIA2_VP_FRAMERATE_30, "30 fps" }, +}; +#define NUM_FRAMERATE_CONTROLS (ARRAY_SIZE(framerate_controls)) + +static struct control_menu_info flicker_controls[] = +{ + { NEVER_FLICKER, "Off" }, + { FLICKER_50, "50 Hz" }, + { FLICKER_60, "60 Hz" }, +}; +#define NUM_FLICKER_CONTROLS (ARRAY_SIZE(flicker_controls)) + +static struct control_menu_info lights_controls[] = +{ + { 0, "Off" }, + { 64, "Top" }, + { 128, "Bottom" }, + { 192, "Both" }, +}; +#define NUM_LIGHTS_CONTROLS (ARRAY_SIZE(lights_controls)) +#define GPIO_LIGHTS_MASK 192 + +static struct v4l2_queryctrl controls[] = { + { + .id = V4L2_CID_BRIGHTNESS, + .type = V4L2_CTRL_TYPE_INTEGER, + .name = "Brightness", + .minimum = 0, + .maximum = 255, + .step = 1, + .default_value = DEFAULT_BRIGHTNESS, + }, + { + .id = V4L2_CID_CONTRAST, + .type = V4L2_CTRL_TYPE_INTEGER, + .name = "Contrast", + .minimum = 0, + .maximum = 255, + .step = 1, + .default_value = DEFAULT_CONTRAST, + }, + { + .id = V4L2_CID_SATURATION, + .type = V4L2_CTRL_TYPE_INTEGER, + .name = "Saturation", + .minimum = 0, + .maximum = 255, + .step = 1, + .default_value = DEFAULT_SATURATION, + }, + { + .id = V4L2_CID_HFLIP, + .type = V4L2_CTRL_TYPE_BOOLEAN, + .name = "Mirror Horizontally", + .minimum = 0, + .maximum = 1, + .step = 1, + .default_value = 0, + }, + { + .id = V4L2_CID_VFLIP, + .type = V4L2_CTRL_TYPE_BOOLEAN, + .name = "Flip Vertically", + .minimum = 0, + .maximum = 1, + .step = 1, + .default_value = 0, + }, + { + .id = CPIA2_CID_TARGET_KB, + .type = V4L2_CTRL_TYPE_INTEGER, + .name = "Target KB", + .minimum = 0, + .maximum = 255, + .step = 1, + .default_value = DEFAULT_TARGET_KB, + }, + { + .id = CPIA2_CID_GPIO, + .type = V4L2_CTRL_TYPE_INTEGER, + .name = "GPIO", + .minimum = 0, + .maximum = 255, + .step = 1, + .default_value = 0, + }, + { + .id = CPIA2_CID_FLICKER_MODE, + .type = V4L2_CTRL_TYPE_MENU, + .name = "Flicker Reduction", + .minimum = 0, + .maximum = NUM_FLICKER_CONTROLS-1, + .step = 1, + .default_value = 0, + }, + { + .id = CPIA2_CID_FRAMERATE, + .type = V4L2_CTRL_TYPE_MENU, + .name = "Framerate", + .minimum = 0, + .maximum = NUM_FRAMERATE_CONTROLS-1, + .step = 1, + .default_value = NUM_FRAMERATE_CONTROLS-1, + }, + { + .id = CPIA2_CID_USB_ALT, + .type = V4L2_CTRL_TYPE_INTEGER, + .name = "USB Alternate", + .minimum = USBIF_ISO_1, + .maximum = USBIF_ISO_6, + .step = 1, + .default_value = DEFAULT_ALT, + }, + { + .id = CPIA2_CID_LIGHTS, + .type = V4L2_CTRL_TYPE_MENU, + .name = "Lights", + .minimum = 0, + .maximum = NUM_LIGHTS_CONTROLS-1, + .step = 1, + .default_value = 0, + }, + { + .id = CPIA2_CID_RESET_CAMERA, + .type = V4L2_CTRL_TYPE_BUTTON, + .name = "Reset Camera", + .minimum = 0, + .maximum = 0, + .step = 0, + .default_value = 0, + }, +}; +#define NUM_CONTROLS (ARRAY_SIZE(controls)) + + +/****************************************************************************** + * + * cpia2_open + * + *****************************************************************************/ +static int cpia2_open(struct file *file) +{ + struct camera_data *cam = video_drvdata(file); + struct cpia2_fh *fh; + + if (!cam) { + ERR("Internal error, camera_data not found!\n"); + return -ENODEV; + } + + if (!cam->present) + return -ENODEV; + + if (cam->open_count == 0) { + if (cpia2_allocate_buffers(cam)) + return -ENOMEM; + + /* reset the camera */ + if (cpia2_reset_camera(cam) < 0) + return -EIO; + + cam->APP_len = 0; + cam->COM_len = 0; + } + + fh = kmalloc(sizeof(*fh), GFP_KERNEL); + if (!fh) + return -ENOMEM; + file->private_data = fh; + fh->prio = V4L2_PRIORITY_UNSET; + v4l2_prio_open(&cam->prio, &fh->prio); + fh->mmapped = 0; + + ++cam->open_count; + + cpia2_dbg_dump_registers(cam); + return 0; +} + +/****************************************************************************** + * + * cpia2_close + * + *****************************************************************************/ +static int cpia2_close(struct file *file) +{ + struct video_device *dev = video_devdata(file); + struct camera_data *cam = video_get_drvdata(dev); + struct cpia2_fh *fh = file->private_data; + + if (cam->present && + (cam->open_count == 1 || fh->prio == V4L2_PRIORITY_RECORD)) { + cpia2_usb_stream_stop(cam); + + if (cam->open_count == 1) { + /* save camera state for later open */ + cpia2_save_camera_state(cam); + + cpia2_set_low_power(cam); + cpia2_free_buffers(cam); + } + } + + if (fh->mmapped) + cam->mmapped = 0; + v4l2_prio_close(&cam->prio, fh->prio); + file->private_data = NULL; + kfree(fh); + + if (--cam->open_count == 0) { + cpia2_free_buffers(cam); + if (!cam->present) { + video_unregister_device(dev); + kfree(cam); + return 0; + } + } + + return 0; +} + +/****************************************************************************** + * + * cpia2_v4l_read + * + *****************************************************************************/ +static ssize_t cpia2_v4l_read(struct file *file, char __user *buf, size_t count, + loff_t *off) +{ + struct camera_data *cam = video_drvdata(file); + int noblock = file->f_flags&O_NONBLOCK; + + struct cpia2_fh *fh = file->private_data; + + if(!cam) + return -EINVAL; + + /* Priority check */ + if(fh->prio != V4L2_PRIORITY_RECORD) { + return -EBUSY; + } + + return cpia2_read(cam, buf, count, noblock); +} + + +/****************************************************************************** + * + * cpia2_v4l_poll + * + *****************************************************************************/ +static unsigned int cpia2_v4l_poll(struct file *filp, struct poll_table_struct *wait) +{ + struct camera_data *cam = video_drvdata(filp); + struct cpia2_fh *fh = filp->private_data; + + if(!cam) + return POLLERR; + + /* Priority check */ + if(fh->prio != V4L2_PRIORITY_RECORD) { + return POLLERR; + } + + return cpia2_poll(cam, filp, wait); +} + + +static int sync(struct camera_data *cam, int frame_nr) +{ + struct framebuf *frame = &cam->buffers[frame_nr]; + + while (1) { + if (frame->status == FRAME_READY) + return 0; + + if (!cam->streaming) { + frame->status = FRAME_READY; + frame->length = 0; + return 0; + } + + mutex_unlock(&cam->v4l2_lock); + wait_event_interruptible(cam->wq_stream, + !cam->streaming || + frame->status == FRAME_READY); + mutex_lock(&cam->v4l2_lock); + if (signal_pending(current)) + return -ERESTARTSYS; + if(!cam->present) + return -ENOTTY; + } +} + +/****************************************************************************** + * + * ioctl_set_gpio + * + *****************************************************************************/ + +static long cpia2_default(struct file *file, void *fh, bool valid_prio, + int cmd, void *arg) +{ + struct camera_data *cam = video_drvdata(file); + __u32 gpio_val; + + if (cmd != CPIA2_CID_GPIO) + return -EINVAL; + + gpio_val = *(__u32*) arg; + + if (gpio_val &~ 0xFFU) + return -EINVAL; + + return cpia2_set_gpio(cam, (unsigned char)gpio_val); +} + +/****************************************************************************** + * + * ioctl_querycap + * + * V4L2 device capabilities + * + *****************************************************************************/ + +static int cpia2_querycap(struct file *file, void *fh, struct v4l2_capability *vc) +{ + struct camera_data *cam = video_drvdata(file); + + strcpy(vc->driver, "cpia2"); + + if (cam->params.pnp_id.product == 0x151) + strcpy(vc->card, "QX5 Microscope"); + else + strcpy(vc->card, "CPiA2 Camera"); + switch (cam->params.pnp_id.device_type) { + case DEVICE_STV_672: + strcat(vc->card, " (672/"); + break; + case DEVICE_STV_676: + strcat(vc->card, " (676/"); + break; + default: + strcat(vc->card, " (XXX/"); + break; + } + switch (cam->params.version.sensor_flags) { + case CPIA2_VP_SENSOR_FLAGS_404: + strcat(vc->card, "404)"); + break; + case CPIA2_VP_SENSOR_FLAGS_407: + strcat(vc->card, "407)"); + break; + case CPIA2_VP_SENSOR_FLAGS_409: + strcat(vc->card, "409)"); + break; + case CPIA2_VP_SENSOR_FLAGS_410: + strcat(vc->card, "410)"); + break; + case CPIA2_VP_SENSOR_FLAGS_500: + strcat(vc->card, "500)"); + break; + default: + strcat(vc->card, "XXX)"); + break; + } + + if (usb_make_path(cam->dev, vc->bus_info, sizeof(vc->bus_info)) <0) + memset(vc->bus_info,0, sizeof(vc->bus_info)); + + vc->capabilities = V4L2_CAP_VIDEO_CAPTURE | + V4L2_CAP_READWRITE | + V4L2_CAP_STREAMING; + + return 0; +} + +/****************************************************************************** + * + * ioctl_input + * + * V4L2 input get/set/enumerate + * + *****************************************************************************/ + +static int cpia2_enum_input(struct file *file, void *fh, struct v4l2_input *i) +{ + if (i->index) + return -EINVAL; + strcpy(i->name, "Camera"); + i->type = V4L2_INPUT_TYPE_CAMERA; + return 0; +} + +static int cpia2_g_input(struct file *file, void *fh, unsigned int *i) +{ + *i = 0; + return 0; +} + +static int cpia2_s_input(struct file *file, void *fh, unsigned int i) +{ + return i ? -EINVAL : 0; +} + +/****************************************************************************** + * + * ioctl_enum_fmt + * + * V4L2 format enumerate + * + *****************************************************************************/ + +static int cpia2_enum_fmt_vid_cap(struct file *file, void *fh, + struct v4l2_fmtdesc *f) +{ + int index = f->index; + + if (index < 0 || index > 1) + return -EINVAL; + + memset(f, 0, sizeof(*f)); + f->index = index; + f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; + f->flags = V4L2_FMT_FLAG_COMPRESSED; + switch(index) { + case 0: + strcpy(f->description, "MJPEG"); + f->pixelformat = V4L2_PIX_FMT_MJPEG; + break; + case 1: + strcpy(f->description, "JPEG"); + f->pixelformat = V4L2_PIX_FMT_JPEG; + break; + default: + return -EINVAL; + } + + return 0; +} + +/****************************************************************************** + * + * ioctl_try_fmt + * + * V4L2 format try + * + *****************************************************************************/ + +static int cpia2_try_fmt_vid_cap(struct file *file, void *fh, + struct v4l2_format *f) +{ + struct camera_data *cam = video_drvdata(file); + + if (f->fmt.pix.pixelformat != V4L2_PIX_FMT_MJPEG && + f->fmt.pix.pixelformat != V4L2_PIX_FMT_JPEG) + return -EINVAL; + + f->fmt.pix.field = V4L2_FIELD_NONE; + f->fmt.pix.bytesperline = 0; + f->fmt.pix.sizeimage = cam->frame_size; + f->fmt.pix.colorspace = V4L2_COLORSPACE_JPEG; + f->fmt.pix.priv = 0; + + switch (cpia2_match_video_size(f->fmt.pix.width, f->fmt.pix.height)) { + case VIDEOSIZE_VGA: + f->fmt.pix.width = 640; + f->fmt.pix.height = 480; + break; + case VIDEOSIZE_CIF: + f->fmt.pix.width = 352; + f->fmt.pix.height = 288; + break; + case VIDEOSIZE_QVGA: + f->fmt.pix.width = 320; + f->fmt.pix.height = 240; + break; + case VIDEOSIZE_288_216: + f->fmt.pix.width = 288; + f->fmt.pix.height = 216; + break; + case VIDEOSIZE_256_192: + f->fmt.pix.width = 256; + f->fmt.pix.height = 192; + break; + case VIDEOSIZE_224_168: + f->fmt.pix.width = 224; + f->fmt.pix.height = 168; + break; + case VIDEOSIZE_192_144: + f->fmt.pix.width = 192; + f->fmt.pix.height = 144; + break; + case VIDEOSIZE_QCIF: + default: + f->fmt.pix.width = 176; + f->fmt.pix.height = 144; + break; + } + + return 0; +} + +/****************************************************************************** + * + * ioctl_set_fmt + * + * V4L2 format set + * + *****************************************************************************/ + +static int cpia2_s_fmt_vid_cap(struct file *file, void *_fh, + struct v4l2_format *f) +{ + struct camera_data *cam = video_drvdata(file); + struct cpia2_fh *fh = _fh; + int err, frame; + + err = v4l2_prio_check(&cam->prio, fh->prio); + if (err) + return err; + err = cpia2_try_fmt_vid_cap(file, _fh, f); + if(err != 0) + return err; + + /* Ensure that only this process can change the format. */ + err = v4l2_prio_change(&cam->prio, &fh->prio, V4L2_PRIORITY_RECORD); + if(err != 0) { + return err; + } + + cam->pixelformat = f->fmt.pix.pixelformat; + + /* NOTE: This should be set to 1 for MJPEG, but some apps don't handle + * the missing Huffman table properly. */ + cam->params.compression.inhibit_htables = 0; + /*f->fmt.pix.pixelformat == V4L2_PIX_FMT_MJPEG;*/ + + /* we set the video window to something smaller or equal to what + * is requested by the user??? + */ + DBG("Requested width = %d, height = %d\n", + f->fmt.pix.width, f->fmt.pix.height); + if (f->fmt.pix.width != cam->width || + f->fmt.pix.height != cam->height) { + cam->width = f->fmt.pix.width; + cam->height = f->fmt.pix.height; + cam->params.roi.width = f->fmt.pix.width; + cam->params.roi.height = f->fmt.pix.height; + cpia2_set_format(cam); + } + + for (frame = 0; frame < cam->num_frames; ++frame) { + if (cam->buffers[frame].status == FRAME_READING) + if ((err = sync(cam, frame)) < 0) + return err; + + cam->buffers[frame].status = FRAME_EMPTY; + } + + return 0; +} + +/****************************************************************************** + * + * ioctl_get_fmt + * + * V4L2 format get + * + *****************************************************************************/ + +static int cpia2_g_fmt_vid_cap(struct file *file, void *fh, + struct v4l2_format *f) +{ + struct camera_data *cam = video_drvdata(file); + + f->fmt.pix.width = cam->width; + f->fmt.pix.height = cam->height; + f->fmt.pix.pixelformat = cam->pixelformat; + f->fmt.pix.field = V4L2_FIELD_NONE; + f->fmt.pix.bytesperline = 0; + f->fmt.pix.sizeimage = cam->frame_size; + f->fmt.pix.colorspace = V4L2_COLORSPACE_JPEG; + f->fmt.pix.priv = 0; + + return 0; +} + +/****************************************************************************** + * + * ioctl_cropcap + * + * V4L2 query cropping capabilities + * NOTE: cropping is currently disabled + * + *****************************************************************************/ + +static int cpia2_cropcap(struct file *file, void *fh, struct v4l2_cropcap *c) +{ + struct camera_data *cam = video_drvdata(file); + + if (c->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) + return -EINVAL; + + c->bounds.left = 0; + c->bounds.top = 0; + c->bounds.width = cam->width; + c->bounds.height = cam->height; + c->defrect.left = 0; + c->defrect.top = 0; + c->defrect.width = cam->width; + c->defrect.height = cam->height; + c->pixelaspect.numerator = 1; + c->pixelaspect.denominator = 1; + + return 0; +} + +/****************************************************************************** + * + * ioctl_queryctrl + * + * V4L2 query possible control variables + * + *****************************************************************************/ + +static int cpia2_queryctrl(struct file *file, void *fh, struct v4l2_queryctrl *c) +{ + struct camera_data *cam = video_drvdata(file); + int i; + + for(i=0; i<NUM_CONTROLS; ++i) { + if(c->id == controls[i].id) { + memcpy(c, controls+i, sizeof(*c)); + break; + } + } + + if(i == NUM_CONTROLS) + return -EINVAL; + + /* Some devices have additional limitations */ + switch(c->id) { + case V4L2_CID_BRIGHTNESS: + /*** + * Don't let the register be set to zero - bug in VP4 + * flash of full brightness + ***/ + if (cam->params.pnp_id.device_type == DEVICE_STV_672) + c->minimum = 1; + break; + case V4L2_CID_VFLIP: + // VP5 Only + if(cam->params.pnp_id.device_type == DEVICE_STV_672) + c->flags |= V4L2_CTRL_FLAG_DISABLED; + break; + case CPIA2_CID_FRAMERATE: + if(cam->params.pnp_id.device_type == DEVICE_STV_672 && + cam->params.version.sensor_flags==CPIA2_VP_SENSOR_FLAGS_500){ + // Maximum 15fps + for(i=0; i<c->maximum; ++i) { + if(framerate_controls[i].value == + CPIA2_VP_FRAMERATE_15) { + c->maximum = i; + c->default_value = i; + } + } + } + break; + case CPIA2_CID_FLICKER_MODE: + // Flicker control only valid for 672. + if(cam->params.pnp_id.device_type != DEVICE_STV_672) + c->flags |= V4L2_CTRL_FLAG_DISABLED; + break; + case CPIA2_CID_LIGHTS: + // Light control only valid for the QX5 Microscope. + if(cam->params.pnp_id.product != 0x151) + c->flags |= V4L2_CTRL_FLAG_DISABLED; + break; + default: + break; + } + + return 0; +} + +/****************************************************************************** + * + * ioctl_querymenu + * + * V4L2 query possible control variables + * + *****************************************************************************/ + +static int cpia2_querymenu(struct file *file, void *fh, struct v4l2_querymenu *m) +{ + struct camera_data *cam = video_drvdata(file); + + switch(m->id) { + case CPIA2_CID_FLICKER_MODE: + if (m->index >= NUM_FLICKER_CONTROLS) + return -EINVAL; + + strcpy(m->name, flicker_controls[m->index].name); + break; + case CPIA2_CID_FRAMERATE: + { + int maximum = NUM_FRAMERATE_CONTROLS - 1; + if(cam->params.pnp_id.device_type == DEVICE_STV_672 && + cam->params.version.sensor_flags==CPIA2_VP_SENSOR_FLAGS_500){ + // Maximum 15fps + int i; + for(i=0; i<maximum; ++i) { + if(framerate_controls[i].value == + CPIA2_VP_FRAMERATE_15) + maximum = i; + } + } + if (m->index > maximum) + return -EINVAL; + + strcpy(m->name, framerate_controls[m->index].name); + break; + } + case CPIA2_CID_LIGHTS: + if (m->index >= NUM_LIGHTS_CONTROLS) + return -EINVAL; + + strcpy(m->name, lights_controls[m->index].name); + break; + default: + return -EINVAL; + } + + return 0; +} + +/****************************************************************************** + * + * ioctl_g_ctrl + * + * V4L2 get the value of a control variable + * + *****************************************************************************/ + +static int cpia2_g_ctrl(struct file *file, void *fh, struct v4l2_control *c) +{ + struct camera_data *cam = video_drvdata(file); + + switch(c->id) { + case V4L2_CID_BRIGHTNESS: + cpia2_do_command(cam, CPIA2_CMD_GET_VP_BRIGHTNESS, + TRANSFER_READ, 0); + c->value = cam->params.color_params.brightness; + break; + case V4L2_CID_CONTRAST: + cpia2_do_command(cam, CPIA2_CMD_GET_CONTRAST, + TRANSFER_READ, 0); + c->value = cam->params.color_params.contrast; + break; + case V4L2_CID_SATURATION: + cpia2_do_command(cam, CPIA2_CMD_GET_VP_SATURATION, + TRANSFER_READ, 0); + c->value = cam->params.color_params.saturation; + break; + case V4L2_CID_HFLIP: + cpia2_do_command(cam, CPIA2_CMD_GET_USER_EFFECTS, + TRANSFER_READ, 0); + c->value = (cam->params.vp_params.user_effects & + CPIA2_VP_USER_EFFECTS_MIRROR) != 0; + break; + case V4L2_CID_VFLIP: + cpia2_do_command(cam, CPIA2_CMD_GET_USER_EFFECTS, + TRANSFER_READ, 0); + c->value = (cam->params.vp_params.user_effects & + CPIA2_VP_USER_EFFECTS_FLIP) != 0; + break; + case CPIA2_CID_TARGET_KB: + c->value = cam->params.vc_params.target_kb; + break; + case CPIA2_CID_GPIO: + cpia2_do_command(cam, CPIA2_CMD_GET_VP_GPIO_DATA, + TRANSFER_READ, 0); + c->value = cam->params.vp_params.gpio_data; + break; + case CPIA2_CID_FLICKER_MODE: + { + int i, mode; + cpia2_do_command(cam, CPIA2_CMD_GET_FLICKER_MODES, + TRANSFER_READ, 0); + if(cam->params.flicker_control.cam_register & + CPIA2_VP_FLICKER_MODES_NEVER_FLICKER) { + mode = NEVER_FLICKER; + } else { + if(cam->params.flicker_control.cam_register & + CPIA2_VP_FLICKER_MODES_50HZ) { + mode = FLICKER_50; + } else { + mode = FLICKER_60; + } + } + for(i=0; i<NUM_FLICKER_CONTROLS; i++) { + if(flicker_controls[i].value == mode) { + c->value = i; + break; + } + } + if(i == NUM_FLICKER_CONTROLS) + return -EINVAL; + break; + } + case CPIA2_CID_FRAMERATE: + { + int maximum = NUM_FRAMERATE_CONTROLS - 1; + int i; + for(i=0; i<= maximum; i++) { + if(cam->params.vp_params.frame_rate == + framerate_controls[i].value) + break; + } + if(i > maximum) + return -EINVAL; + c->value = i; + break; + } + case CPIA2_CID_USB_ALT: + c->value = cam->params.camera_state.stream_mode; + break; + case CPIA2_CID_LIGHTS: + { + int i; + cpia2_do_command(cam, CPIA2_CMD_GET_VP_GPIO_DATA, + TRANSFER_READ, 0); + for(i=0; i<NUM_LIGHTS_CONTROLS; i++) { + if((cam->params.vp_params.gpio_data&GPIO_LIGHTS_MASK) == + lights_controls[i].value) { + break; + } + } + if(i == NUM_LIGHTS_CONTROLS) + return -EINVAL; + c->value = i; + break; + } + case CPIA2_CID_RESET_CAMERA: + return -EINVAL; + default: + return -EINVAL; + } + + DBG("Get control id:%d, value:%d\n", c->id, c->value); + + return 0; +} + +/****************************************************************************** + * + * ioctl_s_ctrl + * + * V4L2 set the value of a control variable + * + *****************************************************************************/ + +static int cpia2_s_ctrl(struct file *file, void *fh, struct v4l2_control *c) +{ + struct camera_data *cam = video_drvdata(file); + int i; + int retval = 0; + + DBG("Set control id:%d, value:%d\n", c->id, c->value); + + /* Check that the value is in range */ + for(i=0; i<NUM_CONTROLS; i++) { + if(c->id == controls[i].id) { + if(c->value < controls[i].minimum || + c->value > controls[i].maximum) { + return -EINVAL; + } + break; + } + } + if(i == NUM_CONTROLS) + return -EINVAL; + + switch(c->id) { + case V4L2_CID_BRIGHTNESS: + cpia2_set_brightness(cam, c->value); + break; + case V4L2_CID_CONTRAST: + cpia2_set_contrast(cam, c->value); + break; + case V4L2_CID_SATURATION: + cpia2_set_saturation(cam, c->value); + break; + case V4L2_CID_HFLIP: + cpia2_set_property_mirror(cam, c->value); + break; + case V4L2_CID_VFLIP: + cpia2_set_property_flip(cam, c->value); + break; + case CPIA2_CID_TARGET_KB: + retval = cpia2_set_target_kb(cam, c->value); + break; + case CPIA2_CID_GPIO: + retval = cpia2_set_gpio(cam, c->value); + break; + case CPIA2_CID_FLICKER_MODE: + retval = cpia2_set_flicker_mode(cam, + flicker_controls[c->value].value); + break; + case CPIA2_CID_FRAMERATE: + retval = cpia2_set_fps(cam, framerate_controls[c->value].value); + break; + case CPIA2_CID_USB_ALT: + retval = cpia2_usb_change_streaming_alternate(cam, c->value); + break; + case CPIA2_CID_LIGHTS: + retval = cpia2_set_gpio(cam, lights_controls[c->value].value); + break; + case CPIA2_CID_RESET_CAMERA: + cpia2_usb_stream_pause(cam); + cpia2_reset_camera(cam); + cpia2_usb_stream_resume(cam); + break; + default: + retval = -EINVAL; + } + + return retval; +} + +/****************************************************************************** + * + * ioctl_g_jpegcomp + * + * V4L2 get the JPEG compression parameters + * + *****************************************************************************/ + +static int cpia2_g_jpegcomp(struct file *file, void *fh, struct v4l2_jpegcompression *parms) +{ + struct camera_data *cam = video_drvdata(file); + + memset(parms, 0, sizeof(*parms)); + + parms->quality = 80; // TODO: Can this be made meaningful? + + parms->jpeg_markers = V4L2_JPEG_MARKER_DQT | V4L2_JPEG_MARKER_DRI; + if(!cam->params.compression.inhibit_htables) { + parms->jpeg_markers |= V4L2_JPEG_MARKER_DHT; + } + + parms->APPn = cam->APPn; + parms->APP_len = cam->APP_len; + if(cam->APP_len > 0) { + memcpy(parms->APP_data, cam->APP_data, cam->APP_len); + parms->jpeg_markers |= V4L2_JPEG_MARKER_APP; + } + + parms->COM_len = cam->COM_len; + if(cam->COM_len > 0) { + memcpy(parms->COM_data, cam->COM_data, cam->COM_len); + parms->jpeg_markers |= JPEG_MARKER_COM; + } + + DBG("G_JPEGCOMP APP_len:%d COM_len:%d\n", + parms->APP_len, parms->COM_len); + + return 0; +} + +/****************************************************************************** + * + * ioctl_s_jpegcomp + * + * V4L2 set the JPEG compression parameters + * NOTE: quality and some jpeg_markers are ignored. + * + *****************************************************************************/ + +static int cpia2_s_jpegcomp(struct file *file, void *fh, struct v4l2_jpegcompression *parms) +{ + struct camera_data *cam = video_drvdata(file); + + DBG("S_JPEGCOMP APP_len:%d COM_len:%d\n", + parms->APP_len, parms->COM_len); + + cam->params.compression.inhibit_htables = + !(parms->jpeg_markers & V4L2_JPEG_MARKER_DHT); + + if(parms->APP_len != 0) { + if(parms->APP_len > 0 && + parms->APP_len <= sizeof(cam->APP_data) && + parms->APPn >= 0 && parms->APPn <= 15) { + cam->APPn = parms->APPn; + cam->APP_len = parms->APP_len; + memcpy(cam->APP_data, parms->APP_data, parms->APP_len); + } else { + LOG("Bad APPn Params n=%d len=%d\n", + parms->APPn, parms->APP_len); + return -EINVAL; + } + } else { + cam->APP_len = 0; + } + + if(parms->COM_len != 0) { + if(parms->COM_len > 0 && + parms->COM_len <= sizeof(cam->COM_data)) { + cam->COM_len = parms->COM_len; + memcpy(cam->COM_data, parms->COM_data, parms->COM_len); + } else { + LOG("Bad COM_len=%d\n", parms->COM_len); + return -EINVAL; + } + } + + return 0; +} + +/****************************************************************************** + * + * ioctl_reqbufs + * + * V4L2 Initiate memory mapping. + * NOTE: The user's request is ignored. For now the buffers are fixed. + * + *****************************************************************************/ + +static int cpia2_reqbufs(struct file *file, void *fh, struct v4l2_requestbuffers *req) +{ + struct camera_data *cam = video_drvdata(file); + + if(req->type != V4L2_BUF_TYPE_VIDEO_CAPTURE || + req->memory != V4L2_MEMORY_MMAP) + return -EINVAL; + + DBG("REQBUFS requested:%d returning:%d\n", req->count, cam->num_frames); + req->count = cam->num_frames; + memset(&req->reserved, 0, sizeof(req->reserved)); + + return 0; +} + +/****************************************************************************** + * + * ioctl_querybuf + * + * V4L2 Query memory buffer status. + * + *****************************************************************************/ + +static int cpia2_querybuf(struct file *file, void *fh, struct v4l2_buffer *buf) +{ + struct camera_data *cam = video_drvdata(file); + + if(buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE || + buf->index > cam->num_frames) + return -EINVAL; + + buf->m.offset = cam->buffers[buf->index].data - cam->frame_buffer; + buf->length = cam->frame_size; + + buf->memory = V4L2_MEMORY_MMAP; + + if(cam->mmapped) + buf->flags = V4L2_BUF_FLAG_MAPPED; + else + buf->flags = 0; + + switch (cam->buffers[buf->index].status) { + case FRAME_EMPTY: + case FRAME_ERROR: + case FRAME_READING: + buf->bytesused = 0; + buf->flags = V4L2_BUF_FLAG_QUEUED; + break; + case FRAME_READY: + buf->bytesused = cam->buffers[buf->index].length; + buf->timestamp = cam->buffers[buf->index].timestamp; + buf->sequence = cam->buffers[buf->index].seq; + buf->flags = V4L2_BUF_FLAG_DONE; + break; + } + + DBG("QUERYBUF index:%d offset:%d flags:%d seq:%d bytesused:%d\n", + buf->index, buf->m.offset, buf->flags, buf->sequence, + buf->bytesused); + + return 0; +} + +/****************************************************************************** + * + * ioctl_qbuf + * + * V4L2 User is freeing buffer + * + *****************************************************************************/ + +static int cpia2_qbuf(struct file *file, void *fh, struct v4l2_buffer *buf) +{ + struct camera_data *cam = video_drvdata(file); + + if(buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE || + buf->memory != V4L2_MEMORY_MMAP || + buf->index > cam->num_frames) + return -EINVAL; + + DBG("QBUF #%d\n", buf->index); + + if(cam->buffers[buf->index].status == FRAME_READY) + cam->buffers[buf->index].status = FRAME_EMPTY; + + return 0; +} + +/****************************************************************************** + * + * find_earliest_filled_buffer + * + * Helper for ioctl_dqbuf. Find the next ready buffer. + * + *****************************************************************************/ + +static int find_earliest_filled_buffer(struct camera_data *cam) +{ + int i; + int found = -1; + for (i=0; i<cam->num_frames; i++) { + if(cam->buffers[i].status == FRAME_READY) { + if(found < 0) { + found = i; + } else { + /* find which buffer is earlier */ + struct timeval *tv1, *tv2; + tv1 = &cam->buffers[i].timestamp; + tv2 = &cam->buffers[found].timestamp; + if(tv1->tv_sec < tv2->tv_sec || + (tv1->tv_sec == tv2->tv_sec && + tv1->tv_usec < tv2->tv_usec)) + found = i; + } + } + } + return found; +} + +/****************************************************************************** + * + * ioctl_dqbuf + * + * V4L2 User is asking for a filled buffer. + * + *****************************************************************************/ + +static int cpia2_dqbuf(struct file *file, void *fh, struct v4l2_buffer *buf) +{ + struct camera_data *cam = video_drvdata(file); + int frame; + + if(buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE || + buf->memory != V4L2_MEMORY_MMAP) + return -EINVAL; + + frame = find_earliest_filled_buffer(cam); + + if(frame < 0 && file->f_flags&O_NONBLOCK) + return -EAGAIN; + + if(frame < 0) { + /* Wait for a frame to become available */ + struct framebuf *cb=cam->curbuff; + mutex_unlock(&cam->v4l2_lock); + wait_event_interruptible(cam->wq_stream, + !cam->present || + (cb=cam->curbuff)->status == FRAME_READY); + mutex_lock(&cam->v4l2_lock); + if (signal_pending(current)) + return -ERESTARTSYS; + if(!cam->present) + return -ENOTTY; + frame = cb->num; + } + + + buf->index = frame; + buf->bytesused = cam->buffers[buf->index].length; + buf->flags = V4L2_BUF_FLAG_MAPPED | V4L2_BUF_FLAG_DONE; + buf->field = V4L2_FIELD_NONE; + buf->timestamp = cam->buffers[buf->index].timestamp; + buf->sequence = cam->buffers[buf->index].seq; + buf->m.offset = cam->buffers[buf->index].data - cam->frame_buffer; + buf->length = cam->frame_size; + buf->input = 0; + buf->reserved = 0; + memset(&buf->timecode, 0, sizeof(buf->timecode)); + + DBG("DQBUF #%d status:%d seq:%d length:%d\n", buf->index, + cam->buffers[buf->index].status, buf->sequence, buf->bytesused); + + return 0; +} + +static int cpia2_g_priority(struct file *file, void *_fh, enum v4l2_priority *p) +{ + struct cpia2_fh *fh = _fh; + + *p = fh->prio; + return 0; +} + +static int cpia2_s_priority(struct file *file, void *_fh, enum v4l2_priority prio) +{ + struct camera_data *cam = video_drvdata(file); + struct cpia2_fh *fh = _fh; + + if (cam->streaming && prio != fh->prio && + fh->prio == V4L2_PRIORITY_RECORD) + /* Can't drop record priority while streaming */ + return -EBUSY; + + if (prio == V4L2_PRIORITY_RECORD && prio != fh->prio && + v4l2_prio_max(&cam->prio) == V4L2_PRIORITY_RECORD) + /* Only one program can record at a time */ + return -EBUSY; + return v4l2_prio_change(&cam->prio, &fh->prio, prio); +} + +static int cpia2_streamon(struct file *file, void *fh, enum v4l2_buf_type type) +{ + struct camera_data *cam = video_drvdata(file); + + DBG("VIDIOC_STREAMON, streaming=%d\n", cam->streaming); + if (!cam->mmapped || type != V4L2_BUF_TYPE_VIDEO_CAPTURE) + return -EINVAL; + + if (!cam->streaming) + return cpia2_usb_stream_start(cam, + cam->params.camera_state.stream_mode); + return -EINVAL; +} + +static int cpia2_streamoff(struct file *file, void *fh, enum v4l2_buf_type type) +{ + struct camera_data *cam = video_drvdata(file); + + DBG("VIDIOC_STREAMOFF, streaming=%d\n", cam->streaming); + if (!cam->mmapped || type != V4L2_BUF_TYPE_VIDEO_CAPTURE) + return -EINVAL; + + if (cam->streaming) + return cpia2_usb_stream_stop(cam); + return -EINVAL; +} + +/****************************************************************************** + * + * cpia2_mmap + * + *****************************************************************************/ +static int cpia2_mmap(struct file *file, struct vm_area_struct *area) +{ + struct camera_data *cam = video_drvdata(file); + int retval; + + /* Priority check */ + struct cpia2_fh *fh = file->private_data; + if(fh->prio != V4L2_PRIORITY_RECORD) { + return -EBUSY; + } + + retval = cpia2_remap_buffer(cam, area); + + if(!retval) + fh->mmapped = 1; + return retval; +} + +/****************************************************************************** + * + * reset_camera_struct_v4l + * + * Sets all values to the defaults + *****************************************************************************/ +static void reset_camera_struct_v4l(struct camera_data *cam) +{ + cam->width = cam->params.roi.width; + cam->height = cam->params.roi.height; + + cam->frame_size = buffer_size; + cam->num_frames = num_buffers; + + /* FlickerModes */ + cam->params.flicker_control.flicker_mode_req = flicker_mode; + cam->params.flicker_control.mains_frequency = flicker_freq; + + /* streamMode */ + cam->params.camera_state.stream_mode = alternate; + + cam->pixelformat = V4L2_PIX_FMT_JPEG; + v4l2_prio_init(&cam->prio); +} + +static const struct v4l2_ioctl_ops cpia2_ioctl_ops = { + .vidioc_querycap = cpia2_querycap, + .vidioc_enum_input = cpia2_enum_input, + .vidioc_g_input = cpia2_g_input, + .vidioc_s_input = cpia2_s_input, + .vidioc_enum_fmt_vid_cap = cpia2_enum_fmt_vid_cap, + .vidioc_g_fmt_vid_cap = cpia2_g_fmt_vid_cap, + .vidioc_s_fmt_vid_cap = cpia2_s_fmt_vid_cap, + .vidioc_try_fmt_vid_cap = cpia2_try_fmt_vid_cap, + .vidioc_queryctrl = cpia2_queryctrl, + .vidioc_querymenu = cpia2_querymenu, + .vidioc_g_ctrl = cpia2_g_ctrl, + .vidioc_s_ctrl = cpia2_s_ctrl, + .vidioc_g_jpegcomp = cpia2_g_jpegcomp, + .vidioc_s_jpegcomp = cpia2_s_jpegcomp, + .vidioc_cropcap = cpia2_cropcap, + .vidioc_reqbufs = cpia2_reqbufs, + .vidioc_querybuf = cpia2_querybuf, + .vidioc_qbuf = cpia2_qbuf, + .vidioc_dqbuf = cpia2_dqbuf, + .vidioc_streamon = cpia2_streamon, + .vidioc_streamoff = cpia2_streamoff, + .vidioc_g_priority = cpia2_g_priority, + .vidioc_s_priority = cpia2_s_priority, + .vidioc_default = cpia2_default, +}; + +/*** + * The v4l video device structure initialized for this device + ***/ +static const struct v4l2_file_operations cpia2_fops = { + .owner = THIS_MODULE, + .open = cpia2_open, + .release = cpia2_close, + .read = cpia2_v4l_read, + .poll = cpia2_v4l_poll, + .unlocked_ioctl = video_ioctl2, + .mmap = cpia2_mmap, +}; + +static struct video_device cpia2_template = { + /* I could not find any place for the old .initialize initializer?? */ + .name = "CPiA2 Camera", + .fops = &cpia2_fops, + .ioctl_ops = &cpia2_ioctl_ops, + .release = video_device_release, +}; + +/****************************************************************************** + * + * cpia2_register_camera + * + *****************************************************************************/ +int cpia2_register_camera(struct camera_data *cam) +{ + cam->vdev = video_device_alloc(); + if(!cam->vdev) + return -ENOMEM; + + memcpy(cam->vdev, &cpia2_template, sizeof(cpia2_template)); + video_set_drvdata(cam->vdev, cam); + cam->vdev->lock = &cam->v4l2_lock; + + reset_camera_struct_v4l(cam); + + /* register v4l device */ + if (video_register_device(cam->vdev, VFL_TYPE_GRABBER, video_nr) < 0) { + ERR("video_register_device failed\n"); + video_device_release(cam->vdev); + return -ENODEV; + } + + return 0; +} + +/****************************************************************************** + * + * cpia2_unregister_camera + * + *****************************************************************************/ +void cpia2_unregister_camera(struct camera_data *cam) +{ + if (!cam->open_count) { + video_unregister_device(cam->vdev); + } else { + LOG("%s removed while open, deferring " + "video_unregister_device\n", + video_device_node_name(cam->vdev)); + } +} + +/****************************************************************************** + * + * check_parameters + * + * Make sure that all user-supplied parameters are sensible + *****************************************************************************/ +static void __init check_parameters(void) +{ + if(buffer_size < PAGE_SIZE) { + buffer_size = PAGE_SIZE; + LOG("buffer_size too small, setting to %d\n", buffer_size); + } else if(buffer_size > 1024*1024) { + /* arbitrary upper limiit */ + buffer_size = 1024*1024; + LOG("buffer_size ridiculously large, setting to %d\n", + buffer_size); + } else { + buffer_size += PAGE_SIZE-1; + buffer_size &= ~(PAGE_SIZE-1); + } + + if(num_buffers < 1) { + num_buffers = 1; + LOG("num_buffers too small, setting to %d\n", num_buffers); + } else if(num_buffers > VIDEO_MAX_FRAME) { + num_buffers = VIDEO_MAX_FRAME; + LOG("num_buffers too large, setting to %d\n", num_buffers); + } + + if(alternate < USBIF_ISO_1 || alternate > USBIF_ISO_6) { + alternate = DEFAULT_ALT; + LOG("alternate specified is invalid, using %d\n", alternate); + } + + if (flicker_mode != NEVER_FLICKER && flicker_mode != ANTI_FLICKER_ON) { + flicker_mode = NEVER_FLICKER; + LOG("Flicker mode specified is invalid, using %d\n", + flicker_mode); + } + + if (flicker_freq != FLICKER_50 && flicker_freq != FLICKER_60) { + flicker_freq = FLICKER_60; + LOG("Flicker mode specified is invalid, using %d\n", + flicker_freq); + } + + if(video_nr < -1 || video_nr > 64) { + video_nr = -1; + LOG("invalid video_nr specified, must be -1 to 64\n"); + } + + DBG("Using %d buffers, each %d bytes, alternate=%d\n", + num_buffers, buffer_size, alternate); +} + +/************ Module Stuff ***************/ + + +/****************************************************************************** + * + * cpia2_init/module_init + * + *****************************************************************************/ +static int __init cpia2_init(void) +{ + LOG("%s v%s\n", + ABOUT, CPIA_VERSION); + check_parameters(); + cpia2_usb_init(); + return 0; +} + + +/****************************************************************************** + * + * cpia2_exit/module_exit + * + *****************************************************************************/ +static void __exit cpia2_exit(void) +{ + cpia2_usb_cleanup(); + schedule_timeout(2 * HZ); +} + +module_init(cpia2_init); +module_exit(cpia2_exit); |