Signed-off-by: Sakari Ailus <sakari.ailus@xxxxxxxxx> Signed-off-by: Sergio Aguirre <saaguirre@xxxxxx> --- drivers/media/video/Kconfig | 8 + drivers/media/video/Makefile | 2 + drivers/media/video/omap34xxcam.c | 2017 +++++++++++++++++++++++++++++++++++++ drivers/media/video/omap34xxcam.h | 215 ++++ 4 files changed, 2242 insertions(+), 0 deletions(-) create mode 100644 drivers/media/video/omap34xxcam.c create mode 100644 drivers/media/video/omap34xxcam.h diff --git a/drivers/media/video/Kconfig b/drivers/media/video/Kconfig index 47102c2..dcd3960 100644 --- a/drivers/media/video/Kconfig +++ b/drivers/media/video/Kconfig @@ -700,6 +700,14 @@ config VIDEO_CAFE_CCIC CMOS camera controller. This is the controller found on first- generation OLPC systems. +config VIDEO_OMAP3 + tristate "OMAP 3 Camera support" + select VIDEOBUF_GEN + select VIDEOBUF_DMA_SG + depends on VIDEO_V4L2 && ARCH_OMAP34XX + ---help--- + Driver for an OMAP 3 camera controller. + config SOC_CAMERA tristate "SoC camera support" depends on VIDEO_V4L2 && HAS_DMA diff --git a/drivers/media/video/Makefile b/drivers/media/video/Makefile index 16962f3..a2f73cf 100644 --- a/drivers/media/video/Makefile +++ b/drivers/media/video/Makefile @@ -101,6 +101,8 @@ obj-$(CONFIG_VIDEO_OV7670) += ov7670.o obj-$(CONFIG_VIDEO_TCM825X) += tcm825x.o +obj-$(CONFIG_VIDEO_OMAP3) += omap34xxcam.o isp/ + obj-$(CONFIG_USB_DABUSB) += dabusb.o obj-$(CONFIG_USB_OV511) += ov511.o obj-$(CONFIG_USB_SE401) += se401.o diff --git a/drivers/media/video/omap34xxcam.c b/drivers/media/video/omap34xxcam.c new file mode 100644 index 0000000..a920bf2 --- /dev/null +++ b/drivers/media/video/omap34xxcam.c @@ -0,0 +1,2017 @@ +/* + * drivers/media/video/omap34xxcam.c + * + * Copyright (C) 2006--2008 Nokia Corporation + * Copyright (C) 2007, 2008 Texas Instruments + * + * Contact: Sakari Ailus <sakari.ailus@xxxxxxxxx> + * Tuukka Toivonen <tuukka.o.toivonen@xxxxxxxxx> + * + * Originally based on the OMAP 2 camera driver. + * + * Written by Sakari Ailus <sakari.ailus@xxxxxxxxx> + * Tuukka Toivonen <tuukka.o.toivonen@xxxxxxxxx> + * Sergio Aguirre <saaguirre@xxxxxx> + * Mohit Jalori + * Sameer Venkatraman + * Leonides Martinez + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * version 2 as published by the Free Software Foundation. + * + * 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., 51 Franklin St, Fifth Floor, Boston, MA + * 02110-1301 USA + * + */ + +#include <linux/io.h> +#include <linux/clk.h> +#include <linux/pci.h> /* needed for videobufs */ +#include <linux/delay.h> +#include <linux/kernel.h> +#include <linux/interrupt.h> +#include <linux/videodev2.h> +#include <linux/version.h> +#include <linux/platform_device.h> + +#include <media/v4l2-common.h> +#include <media/v4l2-ioctl.h> + +#include "omap34xxcam.h" +#include "isp/isp.h" +#include "isp/ispmmu.h" +#include "isp/ispreg.h" +#include "isp/ispccdc.h" +#include "isp/isph3a.h" +#include "isp/isp_af.h" +#include "isp/isphist.h" +#include "isp/isppreview.h" +#include "isp/ispresizer.h" + +#define OMAP34XXCAM_VERSION KERNEL_VERSION(0, 0, 0) + +/* global variables */ +static struct omap34xxcam_device *omap34xxcam; + +struct omap34xxcam_fh *camfh_saved; + +#define OMAP34XXCAM_POWEROFF_DELAY (2 * HZ) + +/* + * + * Sensor handling. + * + */ + +/** + * omap34xxcam_slave_power_set - set slave power state + * @vdev: per-video device data structure + * @power: new power state + */ +static int omap34xxcam_slave_power_set(struct omap34xxcam_videodev *vdev, + enum v4l2_power power, + int mask) +{ + int rval = 0, i = 0; + + BUG_ON(!mutex_is_locked(&vdev->mutex)); + + vdev->power_state_wish = -1; + + for (i = 0; i <= OMAP34XXCAM_SLAVE_FLASH; i++) { + if (vdev->slave[i] == v4l2_int_device_dummy()) + continue; + + if (!(mask & (1 << i)) + || power == vdev->power_state[i]) + continue; + + rval = vidioc_int_s_power(vdev->slave[i], power); + + if (rval && power != V4L2_POWER_OFF) { + power = V4L2_POWER_OFF; + goto out; + } + + vdev->power_state[i] = power; + } + + return 0; + +out: + for (i--; i >= 0; i--) { + if (vdev->slave[i] == v4l2_int_device_dummy()) + continue; + + if (!(mask & (1 << i))) + continue; + + vidioc_int_s_power(vdev->slave[i], power); + vdev->power_state[i] = power; + } + + return rval; +} + +static void omap34xxcam_slave_power_work(struct work_struct *work) +{ + struct omap34xxcam_videodev *vdev = + container_of(work, struct omap34xxcam_videodev, poweroff_work); + + mutex_lock(&vdev->mutex); + + if (vdev->power_state_wish != -1) + omap34xxcam_slave_power_set(vdev, vdev->power_state_wish, + vdev->power_state_mask); + + mutex_unlock(&vdev->mutex); +} + +static void omap34xxcam_slave_power_timer(unsigned long ptr) +{ + struct omap34xxcam_videodev *vdev = (void *)ptr; + + schedule_work(&vdev->poweroff_work); +} + +/** + * omap34xxcam_slave_power_suggest - delayed power state change + * + * @vdev: per-video device data structure + * @power: new power state + */ +static void omap34xxcam_slave_power_suggest(struct omap34xxcam_videodev *vdev, + enum v4l2_power power, + int mask) +{ + BUG_ON(!mutex_is_locked(&vdev->mutex)); + + del_timer(&vdev->poweroff_timer); + + vdev->power_state_wish = power; + vdev->power_state_mask = mask; + + mod_timer(&vdev->poweroff_timer, jiffies + OMAP34XXCAM_POWEROFF_DELAY); +} + +/** + * omap34xxcam_update_vbq - Updates VBQ with completed input buffer + * @vb: ptr. to standard V4L2 video buffer structure + * + * Updates video buffer queue with completed buffer passed as + * input parameter. Also updates ISP H3A timestamp and field count + * statistics. + */ +int omap34xxcam_update_vbq(struct videobuf_buffer *vb) +{ + struct omap34xxcam_fh *fh = camfh_saved; + struct omap34xxcam_videodev *vdev = fh->vdev; + int rval = 0; + + do_gettimeofday(&vb->ts); + vb->field_count = atomic_add_return(2, &fh->field_count); + vb->state = VIDEOBUF_DONE; + + if (vdev->streaming) + rval = 1; + + wake_up(&vb->done); + + return rval; +} + +/** + * omap34xxcam_vbq_setup - Calcs size and num of buffs allowed in queue + * @vbq: ptr. to standard V4L2 video buffer queue structure + * @cnt: ptr to location to hold the count of buffers to be in the queue + * @size: ptr to location to hold the size of a frame + * + * Calculates the number of buffers of current image size that can be + * supported by the available capture memory. + */ +static int omap34xxcam_vbq_setup(struct videobuf_queue *vbq, unsigned int *cnt, + unsigned int *size) +{ + struct omap34xxcam_fh *fh = vbq->priv_data; + + if (*cnt <= 0) + *cnt = VIDEO_MAX_FRAME; /* supply a default number of buffers */ + + if (*cnt > VIDEO_MAX_FRAME) + *cnt = VIDEO_MAX_FRAME; + + *size = fh->pix.sizeimage; + + while (*size * *cnt > fh->vdev->vdev_sensor_config.capture_mem) + (*cnt)--; + + while ((*size * *cnt) > ispmmu_get_mapeable_space()) + (*cnt)--; + + return 0; +} + +/** + * omap34xxcam_vbq_release - Free resources for input VBQ and VB + * @vbq: ptr. to standard V4L2 video buffer queue structure + * @vb: ptr to standard V4L2 video buffer structure + * + * Unmap and free all memory associated with input VBQ and VB, also + * unmap the address in ISP MMU. Reset the VB state. + */ +static void omap34xxcam_vbq_release(struct videobuf_queue *vbq, + struct videobuf_buffer *vb) +{ + if (!vbq->streaming) { + isp_vbq_release(vbq, vb); + videobuf_dma_unmap(vbq, videobuf_to_dma(vb)); + videobuf_dma_free(videobuf_to_dma(vb)); + vb->state = VIDEOBUF_NEEDS_INIT; + } + return; +} + +/** + * omap34xxcam_vbq_prepare - V4L2 video ops buf_prepare handler + * @vbq: ptr. to standard V4L2 video buffer queue structure + * @vb: ptr to standard V4L2 video buffer structure + * @field: standard V4L2 field enum + * + * Verifies there is sufficient locked memory for the requested + * buffer, or if there is not, allocates, locks and initializes + * it. + */ +static int omap34xxcam_vbq_prepare(struct videobuf_queue *vbq, + struct videobuf_buffer *vb, + enum v4l2_field field) +{ + struct omap34xxcam_fh *fh = vbq->priv_data; + int err = 0; + + /* + * Accessing pix here is okay since it's constant while + * streaming is on (and we only get called then). + */ + if (vb->baddr) { + /* This is a userspace buffer. */ + if (fh->pix.sizeimage > vb->bsize) + /* The buffer isn't big enough. */ + return -EINVAL; + } else { + if (vb->state != VIDEOBUF_NEEDS_INIT + && fh->pix.sizeimage > vb->bsize) + /* + * We have a kernel bounce buffer that has + * already been allocated. + */ + omap34xxcam_vbq_release(vbq, vb); + } + + vb->size = fh->pix.bytesperline * fh->pix.height; + vb->width = fh->pix.width; + vb->height = fh->pix.height; + vb->field = field; + + if (vb->state == VIDEOBUF_NEEDS_INIT) { + err = videobuf_iolock(vbq, vb, NULL); + if (!err) { + /* isp_addr will be stored locally inside isp code */ + err = isp_vbq_prepare(vbq, vb, field); + } + } + + if (!err) + vb->state = VIDEOBUF_PREPARED; + else + omap34xxcam_vbq_release(vbq, vb); + + return err; + +} + +/** + * omap34xxcam_vbq_queue - V4L2 video ops buf_queue handler + * @vbq: ptr. to standard V4L2 video buffer queue structure + * @vb: ptr to standard V4L2 video buffer structure + * + * Maps the video buffer to sgdma and through the isp, sets + * the isp buffer done callback and sets the video buffer state + * to active. + */ +static void omap34xxcam_vbq_queue(struct videobuf_queue *vbq, + struct videobuf_buffer *vb) +{ + struct omap34xxcam_fh *fh = vbq->priv_data; + struct omap34xxcam_videodev *vdev = fh->vdev; + enum videobuf_state state = vb->state; + isp_vbq_callback_ptr func_ptr; + int err = 0; + camfh_saved = fh; + + func_ptr = omap34xxcam_update_vbq; + vb->state = VIDEOBUF_ACTIVE; + + err = isp_sgdma_queue(videobuf_to_dma(vb), + vb, 0, &vdev->cam->dma_notify, func_ptr); + if (err) { + dev_dbg(vdev->cam->dev, "vbq queue failed\n"); + vb->state = state; + } + +} + +static struct videobuf_queue_ops omap34xxcam_vbq_ops = { + .buf_setup = omap34xxcam_vbq_setup, + .buf_prepare = omap34xxcam_vbq_prepare, + .buf_queue = omap34xxcam_vbq_queue, + .buf_release = omap34xxcam_vbq_release, +}; + +/* + * + * IOCTL interface. + * + */ + +/** + * vidioc_querycap - V4L2 query capabilities IOCTL handler + * @file: ptr. to system file structure + * @fh: ptr to hold address of omap34xxcam_fh struct (per-filehandle data) + * @cap: ptr to standard V4L2 capability structure + * + * Fill in the V4L2 capabliity structure for the camera device + */ +static int vidioc_querycap(struct file *file, void *fh, + struct v4l2_capability *cap) +{ + struct omap34xxcam_fh *ofh = fh; + struct omap34xxcam_videodev *vdev = ofh->vdev; + + strlcpy(cap->driver, CAM_SHORT_NAME, sizeof(cap->driver)); + strlcpy(cap->card, vdev->vfd->name, sizeof(cap->card)); + cap->version = OMAP34XXCAM_VERSION; + cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING; + + return 0; +} + +/** + * vidioc_enum_fmt_vid_cap - V4L2 enumerate format capabilities IOCTL handler + * @file: ptr. to system file structure + * @fh: ptr to hold address of omap34xxcam_fh struct (per-filehandle data) + * @f: ptr to standard V4L2 format description structure + * + * Fills in enumerate format capabilities information for sensor (if SOC + * sensor attached) or ISP (if raw sensor attached). + */ +static int vidioc_enum_fmt_vid_cap(struct file *file, void *fh, + struct v4l2_fmtdesc *f) +{ + struct omap34xxcam_fh *ofh = fh; + struct omap34xxcam_videodev *vdev = ofh->vdev; + int rval; + + if (vdev->vdev_sensor_config.sensor_isp) + rval = vidioc_int_enum_fmt_cap(vdev->vdev_sensor, f); + else + rval = isp_enum_fmt_cap(f); + + return rval; +} + +/** + * vidioc_g_fmt_vid_cap - V4L2 get format capabilities IOCTL handler + * @file: ptr. to system file structure + * @fh: ptr to hold address of omap34xxcam_fh struct (per-filehandle data) + * @f: ptr to standard V4L2 format structure + * + * Fills in format capabilities for sensor (if SOC sensor attached) or ISP + * (if raw sensor attached). + */ +static int vidioc_g_fmt_vid_cap(struct file *file, void *fh, + struct v4l2_format *f) +{ + struct omap34xxcam_fh *ofh = fh; + struct omap34xxcam_videodev *vdev = ofh->vdev; + + mutex_lock(&vdev->mutex); + f->fmt.pix = ofh->pix; + mutex_unlock(&vdev->mutex); + + return 0; +} + +static int try_pix_parm(struct omap34xxcam_videodev *vdev, + struct v4l2_pix_format *best_pix_in, + struct v4l2_pix_format *wanted_pix_out, + struct v4l2_fract *best_ival) +{ + int fps; + int rval; + int size_index; + struct v4l2_pix_format best_pix_out; + + if (best_ival->numerator == 0 + || best_ival->denominator == 0) + best_ival->denominator = 30, best_ival->numerator = 1; + + fps = best_ival->denominator / best_ival->numerator; + + best_ival->denominator = 0; + + best_pix_out.height = INT_MAX >> 1; + best_pix_out.width = best_pix_out.height; + + /* + * Get supported resolutions. + */ + for (size_index = 0; ; size_index++) { + struct v4l2_frmsizeenum frms; + struct v4l2_pix_format pix_tmp_in, pix_tmp_out; + int ival_index; + + frms.index = size_index; + frms.pixel_format = best_pix_in->pixelformat; + + rval = vidioc_int_enum_framesizes(vdev->vdev_sensor, &frms); + if (rval) { + rval = 0; + break; + } + + pix_tmp_in.pixelformat = frms.pixel_format; + pix_tmp_in.width = frms.discrete.width; + pix_tmp_in.height = frms.discrete.height; + pix_tmp_out = *wanted_pix_out; + /* Don't do upscaling. */ + if (pix_tmp_out.width > pix_tmp_in.width) + pix_tmp_out.width = pix_tmp_in.width; + if (pix_tmp_out.height > pix_tmp_in.height) + pix_tmp_out.height = pix_tmp_in.height; + rval = isp_try_fmt_cap(&pix_tmp_in, &pix_tmp_out); + if (rval) + return rval; + +#define IS_SMALLER_OR_EQUAL(pix1, pix2) \ + ((pix1)->width + (pix1)->height \ + < (pix2)->width + (pix2)->height) +#define SIZE_DIFF(pix1, pix2) \ + (abs((pix1)->width - (pix2)->width) \ + + abs((pix1)->height - (pix2)->height)) + + /* + * Don't use modes that are farther from wanted size + * that what we already got. + */ + if (SIZE_DIFF(&pix_tmp_out, wanted_pix_out) + > SIZE_DIFF(&best_pix_out, wanted_pix_out)) + continue; + + /* + * There's an input mode that can provide output + * closer to wanted. + */ + if (SIZE_DIFF(&pix_tmp_out, wanted_pix_out) + < SIZE_DIFF(&best_pix_out, wanted_pix_out)) + /* Force renegotation of fps etc. */ + best_ival->denominator = 0; + + for (ival_index = 0; ; ival_index++) { + struct v4l2_frmivalenum frmi; + + frmi.index = ival_index; + frmi.pixel_format = frms.pixel_format; + frmi.width = frms.discrete.width; + frmi.height = frms.discrete.height; + /* FIXME: try to fix standard... */ + frmi.reserved[0] = 0xdeafbeef; + + rval = vidioc_int_enum_frameintervals(vdev->vdev_sensor, + &frmi); + if (rval) { + rval = 0; + break; + } + + if (best_ival->denominator == 0) + goto do_it_now; + + /* + * We aim to use maximum resolution from the + * sensor, provided that the fps is at least + * as close as on the current mode. + */ +#define FPS_ABS_DIFF(fps, ival) abs(fps - (ival).denominator / (ival).numerator) + + /* Select mode with closest fps. */ + if (FPS_ABS_DIFF(fps, frmi.discrete) + < FPS_ABS_DIFF(fps, *best_ival)) + goto do_it_now; + + /* + * Select bigger resolution if it's available + * at same fps. + */ + if (frmi.width > best_pix_in->width + && FPS_ABS_DIFF(fps, frmi.discrete) + <= FPS_ABS_DIFF(fps, *best_ival)) + goto do_it_now; + + continue; + +do_it_now: + *best_ival = frmi.discrete; + best_pix_out = pix_tmp_out; + best_pix_in->width = frmi.width; + best_pix_in->height = frmi.height; + best_pix_in->pixelformat = frmi.pixel_format; + } + } + + if (best_ival->denominator == 0) + return -EINVAL; + + *wanted_pix_out = best_pix_out; + + dev_info(vdev->cam->dev, "w %d, h %d -> w %d, h %d\n", + best_pix_in->width, best_pix_in->height, + best_pix_out.width, best_pix_out.height); + + return isp_try_fmt_cap(best_pix_in, wanted_pix_out); +} + +static int s_pix_parm(struct omap34xxcam_videodev *vdev, + struct v4l2_pix_format *best_pix, + struct v4l2_pix_format *pix, + struct v4l2_fract *best_ival) +{ + struct v4l2_streamparm a; + struct v4l2_format fmt; + int rval; + int fmtd_index; + + for (fmtd_index = 0; ; fmtd_index++) { + struct v4l2_fmtdesc fmtd; + + fmtd.index = fmtd_index; + fmtd.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; + rval = vidioc_int_enum_fmt_cap(vdev->vdev_sensor, &fmtd); + if (rval) + return rval; + best_pix->pixelformat = fmtd.pixelformat; + + rval = try_pix_parm(vdev, best_pix, pix, best_ival); + if (!rval) + break; + } + + rval = isp_s_fmt_cap(best_pix, pix); + if (rval) + return rval; + + fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; + fmt.fmt.pix = *best_pix; + rval = vidioc_int_s_fmt_cap(vdev->vdev_sensor, &fmt); + if (rval) + return rval; + + a.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; + a.parm.capture.timeperframe = *best_ival; + rval = vidioc_int_s_parm(vdev->vdev_sensor, &a); + + return rval; +} + +/** + * vidioc_s_fmt_vid_cap - V4L2 set format capabilities IOCTL handler + * @file: ptr. to system file structure + * @fh: ptr to hold address of omap34xxcam_fh struct (per-filehandle data) + * @f: ptr to standard V4L2 format structure + * + * Attempts to set input format with the sensor driver (first) and then the + * ISP. Returns the return code from vidioc_g_fmt_vid_cap(). + */ +static int vidioc_s_fmt_vid_cap(struct file *file, void *fh, + struct v4l2_format *f) +{ + struct omap34xxcam_fh *ofh = fh; + struct omap34xxcam_videodev *vdev = ofh->vdev; + struct v4l2_pix_format pix_tmp; + struct v4l2_fract timeperframe; + int rval; + + mutex_lock(&vdev->mutex); + if (vdev->streaming) { + rval = -EBUSY; + goto out; + } + + vdev->want_pix = f->fmt.pix; + + timeperframe = vdev->want_timeperframe; + + rval = s_pix_parm(vdev, &pix_tmp, &f->fmt.pix, &timeperframe); + pix_tmp = f->fmt.pix; + +out: + mutex_unlock(&vdev->mutex); + + if (!rval) { + mutex_lock(&ofh->vbq.vb_lock); + ofh->pix = pix_tmp; + mutex_unlock(&ofh->vbq.vb_lock); + } + + return rval; +} + +/** + * vidioc_try_fmt_vid_cap - V4L2 try format capabilities IOCTL handler + * @file: ptr. to system file structure + * @fh: ptr to hold address of omap34xxcam_fh struct (per-filehandle data) + * @f: ptr to standard V4L2 format structure + * + * Checks if the given format is supported by the sensor driver and + * by the ISP. + */ +static int vidioc_try_fmt_vid_cap(struct file *file, void *fh, + struct v4l2_format *f) +{ + struct omap34xxcam_fh *ofh = fh; + struct omap34xxcam_videodev *vdev = ofh->vdev; + struct v4l2_pix_format pix_tmp; + struct v4l2_fract timeperframe; + int rval; + int fmtd_index; + + mutex_lock(&vdev->mutex); + + + for (fmtd_index = 0; ; fmtd_index++) { + struct v4l2_fmtdesc fmtd; + + timeperframe = vdev->want_timeperframe; + + fmtd.index = fmtd_index; + fmtd.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; + rval = vidioc_int_enum_fmt_cap(vdev->vdev_sensor, &fmtd); + if (rval) + return rval; + pix_tmp.pixelformat = fmtd.pixelformat; + + rval = try_pix_parm(vdev, &pix_tmp, &f->fmt.pix, &timeperframe); + if (!rval) + break; + } + + mutex_unlock(&vdev->mutex); + + return rval; +} + +/** + * vidioc_reqbufs - V4L2 request buffers IOCTL handler + * @file: ptr. to system file structure + * @fh: ptr to hold address of omap34xxcam_fh struct (per-filehandle data) + * @b: ptr to standard V4L2 request buffers structure + * + * Attempts to get a buffer from the buffer queue associated with the + * fh through the video buffer library API. + */ +static int vidioc_reqbufs(struct file *file, void *fh, + struct v4l2_requestbuffers *b) +{ + struct omap34xxcam_fh *ofh = fh; + struct omap34xxcam_videodev *vdev = ofh->vdev; + int rval; + + mutex_lock(&vdev->mutex); + if (vdev->streaming) { + mutex_unlock(&vdev->mutex); + return -EBUSY; + } + + mutex_unlock(&vdev->mutex); + + rval = videobuf_reqbufs(&ofh->vbq, b); + + /* + * Either videobuf_reqbufs failed or the buffers are not + * memory-mapped (which would need special attention). + */ + if (rval < 0 || b->memory != V4L2_MEMORY_MMAP) + goto out; + +out: + return rval; +} + +/** + * vidioc_querybuf - V4L2 query buffer IOCTL handler + * @file: ptr. to system file structure + * @fh: ptr to hold address of omap34xxcam_fh struct (per-filehandle data) + * @b: ptr to standard V4L2 buffer structure + * + * Attempts to fill in the v4l2_buffer structure for the buffer queue + * associated with the fh through the video buffer library API. + */ +static int vidioc_querybuf(struct file *file, void *fh, struct v4l2_buffer *b) +{ + struct omap34xxcam_fh *ofh = fh; + + return videobuf_querybuf(&ofh->vbq, b); +} + +/** + * vidioc_qbuf - V4L2 queue buffer IOCTL handler + * @file: ptr. to system file structure + * @fh: ptr to hold address of omap34xxcam_fh struct (per-filehandle data) + * @b: ptr to standard V4L2 buffer structure + * + * Attempts to queue the v4l2_buffer on the buffer queue + * associated with the fh through the video buffer library API. + */ +static int vidioc_qbuf(struct file *file, void *fh, struct v4l2_buffer *b) +{ + struct omap34xxcam_fh *ofh = fh; + + return videobuf_qbuf(&ofh->vbq, b); +} + +/** + * vidioc_dqbuf - V4L2 dequeue buffer IOCTL handler + * @file: ptr. to system file structure + * @fh: ptr to hold address of omap34xxcam_fh struct (per-filehandle data) + * @b: ptr to standard V4L2 buffer structure + * + * Attempts to dequeue the v4l2_buffer from the buffer queue + * associated with the fh through the video buffer library API. If the + * buffer is a user space buffer, then this function will also requeue it, + * as user does not expect to do this. + */ +static int vidioc_dqbuf(struct file *file, void *fh, struct v4l2_buffer *b) +{ + struct omap34xxcam_fh *ofh = fh; + + return videobuf_dqbuf(&ofh->vbq, b, file->f_flags & O_NONBLOCK); +} + +/** + * vidioc_streamon - V4L2 streamon IOCTL handler + * @file: ptr. to system file structure + * @fh: ptr to hold address of omap34xxcam_fh struct (per-filehandle data) + * @i: V4L2 buffer type + * + * Attempts to start streaming by enabling the sensor interface and turning + * on video buffer streaming through the video buffer library API. Upon + * success the function returns 0, otherwise an error code is returned. + */ +static int vidioc_streamon(struct file *file, void *fh, enum v4l2_buf_type i) +{ + struct omap34xxcam_fh *ofh = fh; + struct omap34xxcam_videodev *vdev = ofh->vdev; + struct omap34xxcam_device *cam = vdev->cam; + int rval; + + mutex_lock(&vdev->mutex); + if (vdev->streaming) { + rval = -EBUSY; + goto out; + } + + cam->dma_notify = 1; + isp_sgdma_init(); + rval = videobuf_streamon(&ofh->vbq); + if (rval) { + dev_dbg(vdev->cam->dev, "omap34xxcam_slave_power_set failed\n"); + goto out; + } + + + rval = omap34xxcam_slave_power_set(vdev, V4L2_POWER_ON, + OMAP34XXCAM_SLAVE_POWER_SENSOR_LENS); + if (!rval) { + vdev->streaming = file; + } else { + isp_stop(); + videobuf_streamoff(&ofh->vbq); + } + +out: + mutex_unlock(&vdev->mutex); + + return rval; +} + +/** + * vidioc_streamoff - V4L2 streamoff IOCTL handler + * @file: ptr. to system file structure + * @fh: ptr to hold address of omap34xxcam_fh struct (per-filehandle data) + * @i: V4L2 buffer type + * + * Attempts to stop streaming by flushing all scheduled work, waiting on + * any queued buffers to complete and then stopping the ISP and turning + * off video buffer streaming through the video buffer library API. Upon + * success the function returns 0, otherwise an error code is returned. + */ +static int vidioc_streamoff(struct file *file, void *fh, enum v4l2_buf_type i) +{ + struct omap34xxcam_fh *ofh = fh; + struct omap34xxcam_videodev *vdev = ofh->vdev; + struct videobuf_queue *q = &ofh->vbq; + int rval; + + mutex_lock(&vdev->mutex); + + if (vdev->streaming == file) + isp_stop(); + + rval = videobuf_streamoff(q); + if (!rval) + vdev->streaming = NULL; + + omap34xxcam_slave_power_set(vdev, V4L2_POWER_STANDBY, + OMAP34XXCAM_SLAVE_POWER_SENSOR); + omap34xxcam_slave_power_suggest(vdev, V4L2_POWER_STANDBY, + OMAP34XXCAM_SLAVE_POWER_LENS); + + mutex_unlock(&vdev->mutex); + + return rval; +} + +/** + * vidioc_enum_input - V4L2 enumerate input IOCTL handler + * @file: ptr. to system file structure + * @fh: ptr to hold address of omap34xxcam_fh struct (per-filehandle data) + * @inp: V4L2 input type information structure + * + * Fills in v4l2_input structure. Returns 0. + */ +static int vidioc_enum_input(struct file *file, void *fh, + struct v4l2_input *inp) +{ + if (inp->index > 0) + return -EINVAL; + + strlcpy(inp->name, "camera", sizeof(inp->name)); + inp->type = V4L2_INPUT_TYPE_CAMERA; + + return 0; +} + +/** + * vidioc_g_input - V4L2 get input IOCTL handler + * @file: ptr. to system file structure + * @fh: ptr to hold address of omap34xxcam_fh struct (per-filehandle data) + * @i: address to hold index of input supported + * + * Sets index to 0. + */ +static int vidioc_g_input(struct file *file, void *fh, unsigned int *i) +{ + *i = 0; + + return 0; +} + +/** + * vidioc_s_input - V4L2 set input IOCTL handler + * @file: ptr. to system file structure + * @fh: ptr to hold address of omap34xxcam_fh struct (per-filehandle data) + * @i: index of input selected + * + * 0 is only index supported. + */ +static int vidioc_s_input(struct file *file, void *fh, unsigned int i) +{ + if (i > 0) + return -EINVAL; + + return 0; +} + +/** + * vidioc_queryctrl - V4L2 query control IOCTL handler + * @file: ptr. to system file structure + * @fh: ptr to hold address of omap34xxcam_fh struct (per-filehandle data) + * @a: standard V4L2 query control ioctl structure + * + * If the requested control is supported, returns the control information + * in the v4l2_queryctrl structure. Otherwise, returns -EINVAL if the + * control is not supported. If the sensor being used is a "smart sensor", + * this request is passed to the sensor driver, otherwise the ISP is + * queried and if it does not support the requested control, the request + * is forwarded to the "raw" sensor driver to see if it supports it. + */ +static int vidioc_queryctrl(struct file *file, void *fh, + struct v4l2_queryctrl *a) +{ + struct omap34xxcam_fh *ofh = fh; + struct omap34xxcam_videodev *vdev = ofh->vdev; + struct v4l2_queryctrl a_tmp; + int best_slave = -1; + u32 best_ctrl = (u32)-1; + int i; + + if (vdev->vdev_sensor_config.sensor_isp) + return vidioc_int_queryctrl(vdev->vdev_sensor, a); + + /* No next flags: try slaves directly. */ + if (!(a->id & V4L2_CTRL_FLAG_NEXT_CTRL)) { + for (i = 0; i <= OMAP34XXCAM_SLAVE_FLASH; i++) { + if (!vidioc_int_queryctrl(vdev->slave[i], a)) + return 0; + } + return isp_queryctrl(a); + } + + /* Find slave with smallest next control id. */ + for (i = 0; i <= OMAP34XXCAM_SLAVE_FLASH; i++) { + a_tmp = *a; + + if (vidioc_int_queryctrl(vdev->slave[i], &a_tmp)) + continue; + + if (a_tmp.id < best_ctrl) { + best_slave = i; + best_ctrl = a_tmp.id; + } + } + + a_tmp = *a; + if (!isp_queryctrl(&a_tmp)) { + if (a_tmp.id < best_ctrl) { + *a = a_tmp; + + return 0; + } + } + + if (best_slave == -1) + return -EINVAL; + + a->id = best_ctrl; + return vidioc_int_queryctrl(vdev->slave[best_slave], a); +} + +/** + * vidioc_querymenu - V4L2 query menu IOCTL handler + * @file: ptr. to system file structure + * @fh: ptr to hold address of omap34xxcam_fh struct (per-filehandle data) + * @a: standard V4L2 query menu ioctl structure + * + * If the requested control is supported, returns the menu information + * in the v4l2_querymenu structure. Otherwise, returns -EINVAL if the + * control is not supported or is not a menu. If the sensor being used + * is a "smart sensor", this request is passed to the sensor driver, + * otherwise the ISP is queried and if it does not support the requested + * menu control, the request is forwarded to the "raw" sensor driver to + * see if it supports it. + */ +static int vidioc_querymenu(struct file *file, void *fh, + struct v4l2_querymenu *a) +{ + struct omap34xxcam_fh *ofh = fh; + struct omap34xxcam_videodev *vdev = ofh->vdev; + int i; + + if (vdev->vdev_sensor_config.sensor_isp) + return vidioc_int_querymenu(vdev->vdev_sensor, a); + + /* Try slaves directly. */ + for (i = 0; i <= OMAP34XXCAM_SLAVE_FLASH; i++) { + if (!vidioc_int_querymenu(vdev->slave[i], a)) + return 0; + } + return isp_querymenu(a); +} + +static int vidioc_g_ext_ctrls(struct file *file, void *fh, + struct v4l2_ext_controls *a) +{ + struct omap34xxcam_fh *ofh = fh; + struct omap34xxcam_videodev *vdev = ofh->vdev; + int i, ctrl_idx, rval = 0; + + mutex_lock(&vdev->mutex); + + for (ctrl_idx = 0; ctrl_idx < a->count; ctrl_idx++) { + struct v4l2_control ctrl; + + ctrl.id = a->controls[ctrl_idx].id; + + if (vdev->vdev_sensor_config.sensor_isp) { + rval = vidioc_int_g_ctrl(vdev->vdev_sensor, &ctrl); + } else { + for (i = 0; i <= OMAP34XXCAM_SLAVE_FLASH; i++) { + rval = vidioc_int_g_ctrl(vdev->slave[i], &ctrl); + if (!rval) + break; + } + } + + if (rval) + rval = isp_g_ctrl(&ctrl); + + if (rval) { + a->error_idx = ctrl_idx; + break; + } + + a->controls[ctrl_idx].value = ctrl.value; + } + + mutex_unlock(&vdev->mutex); + + return rval; +} + +static int vidioc_s_ext_ctrls(struct file *file, void *fh, + struct v4l2_ext_controls *a) +{ + struct omap34xxcam_fh *ofh = fh; + struct omap34xxcam_videodev *vdev = ofh->vdev; + int i, ctrl_idx, rval = 0; + + mutex_lock(&vdev->mutex); + + for (ctrl_idx = 0; ctrl_idx < a->count; ctrl_idx++) { + struct v4l2_control ctrl; + + ctrl.id = a->controls[ctrl_idx].id; + ctrl.value = a->controls[ctrl_idx].value; + + if (vdev->vdev_sensor_config.sensor_isp) { + rval = vidioc_int_s_ctrl(vdev->vdev_sensor, &ctrl); + } else { + for (i = 0; i <= OMAP34XXCAM_SLAVE_FLASH; i++) { + rval = vidioc_int_s_ctrl(vdev->slave[i], &ctrl); + if (!rval) + break; + } + } + + if (rval) + rval = isp_s_ctrl(&ctrl); + + if (rval) { + a->error_idx = ctrl_idx; + break; + } + + a->controls[ctrl_idx].value = ctrl.value; + } + + mutex_unlock(&vdev->mutex); + + return rval; +} + +/** + * vidioc_g_parm - V4L2 get parameters IOCTL handler + * @file: ptr. to system file structure + * @fh: ptr to hold address of omap34xxcam_fh struct (per-filehandle data) + * @a: standard V4L2 stream parameters structure + * + * If request is for video capture buffer type, handles request by + * forwarding to sensor driver. + */ +static int vidioc_g_parm(struct file *file, void *fh, struct v4l2_streamparm *a) +{ + struct omap34xxcam_fh *ofh = fh; + struct omap34xxcam_videodev *vdev = ofh->vdev; + int rval; + + if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) + return -EINVAL; + + mutex_lock(&vdev->mutex); + rval = vidioc_int_g_parm(vdev->vdev_sensor, a); + mutex_unlock(&vdev->mutex); + + return rval; +} + +/** + * vidioc_s_parm - V4L2 set parameters IOCTL handler + * @file: ptr. to system file structure + * @fh: ptr to hold address of omap34xxcam_fh struct (per-filehandle data) + * @a: standard V4L2 stream parameters structure + * + * If request is for video capture buffer type, handles request by + * first getting current stream parameters from sensor, then forwarding + * request to set new parameters to sensor driver. It then attempts to + * enable the sensor interface with the new parameters. If this fails, it + * reverts back to the previous parameters. + */ +static int vidioc_s_parm(struct file *file, void *fh, struct v4l2_streamparm *a) +{ + struct omap34xxcam_fh *ofh = fh; + struct omap34xxcam_videodev *vdev = ofh->vdev; + struct v4l2_pix_format pix_tmp_sensor, pix_tmp; + int rval; + + if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) + return -EINVAL; + + mutex_lock(&vdev->mutex); + if (vdev->streaming) { + rval = -EBUSY; + goto out; + } + + vdev->want_timeperframe = a->parm.capture.timeperframe; + + pix_tmp = vdev->want_pix; + + rval = s_pix_parm(vdev, &pix_tmp_sensor, &pix_tmp, + &a->parm.capture.timeperframe); + +out: + mutex_unlock(&vdev->mutex); + + return rval; +} + +/** + * vidioc_cropcap - V4L2 crop capture IOCTL handler + * @file: ptr. to system file structure + * @fh: ptr to hold address of omap34xxcam_fh struct (per-filehandle data) + * @a: standard V4L2 crop capture structure + * + * If using a "smart" sensor, just forwards request to the sensor driver, + * otherwise fills in the v4l2_cropcap values locally. + */ +static int vidioc_cropcap(struct file *file, void *fh, struct v4l2_cropcap *a) +{ + struct omap34xxcam_fh *ofh = fh; + struct omap34xxcam_videodev *vdev = ofh->vdev; + struct v4l2_cropcap *cropcap = a; + int rval; + + mutex_lock(&vdev->mutex); + + if (vdev->vdev_sensor_config.sensor_isp) { + rval = vidioc_int_cropcap(vdev->vdev_sensor, a); + } else { + struct v4l2_format f; + + rval = vidioc_int_cropcap(vdev->vdev_sensor, a); + if (!rval) + return rval; + + /* cropcap failed, try to do this via g_fmt_cap */ + rval = vidioc_int_g_fmt_cap(vdev->vdev_sensor, &f); + if (!rval) { + cropcap->bounds.top = 0; + cropcap->bounds.left = 0; + cropcap->bounds.width = f.fmt.pix.width; + cropcap->bounds.height = f.fmt.pix.height; + cropcap->defrect = cropcap->bounds; + cropcap->pixelaspect.numerator = 1; + cropcap->pixelaspect.denominator = 1; + } + } + + mutex_unlock(&vdev->mutex); + + return rval; +} + +/** + * vidioc_g_crop - V4L2 get capture crop IOCTL handler + * @file: ptr. to system file structure + * @fh: ptr to hold address of omap34xxcam_fh struct (per-filehandle data) + * @a: standard V4L2 crop structure + * + * If using a "smart" sensor, just forwards request to the sensor driver, + * otherwise calls the isp functions to fill in current crop values. + */ +static int vidioc_g_crop(struct file *file, void *fh, struct v4l2_crop *a) +{ + struct omap34xxcam_fh *ofh = fh; + struct omap34xxcam_videodev *vdev = ofh->vdev; + int rval = 0; + + mutex_lock(&vdev->mutex); + + if (vdev->vdev_sensor_config.sensor_isp) + rval = vidioc_int_g_crop(vdev->vdev_sensor, a); + else + rval = isp_g_crop(a); + + mutex_unlock(&vdev->mutex); + + return rval; +} + +/** + * vidioc_s_crop - V4L2 set capture crop IOCTL handler + * @file: ptr. to system file structure + * @fh: ptr to hold address of omap34xxcam_fh struct (per-filehandle data) + * @a: standard V4L2 crop structure + * + * If using a "smart" sensor, just forwards request to the sensor driver, + * otherwise calls the isp functions to set the current crop values. + */ +static int vidioc_s_crop(struct file *file, void *fh, struct v4l2_crop *a) +{ + struct omap34xxcam_fh *ofh = fh; + struct omap34xxcam_videodev *vdev = ofh->vdev; + struct v4l2_pix_format *pix = &ofh->pix; + int rval = 0; + + mutex_lock(&vdev->mutex); + + if (vdev->vdev_sensor_config.sensor_isp) + rval = vidioc_int_s_crop(vdev->vdev_sensor, a); + else + rval = isp_s_crop(a, pix); + + mutex_unlock(&vdev->mutex); + + return rval; +} + +static int vidioc_enum_framesizes(struct file *file, void *fh, + struct v4l2_frmsizeenum *frms) +{ + struct omap34xxcam_fh *ofh = fh; + struct omap34xxcam_videodev *vdev = ofh->vdev; + u32 pixel_format; + int rval; + + pixel_format = frms->pixel_format; + frms->pixel_format = V4L2_PIX_FMT_SGRBG10; /* We can accept any. */ + + mutex_lock(&vdev->mutex); + rval = vidioc_int_enum_framesizes(vdev->vdev_sensor, frms); + mutex_unlock(&vdev->mutex); + + frms->pixel_format = pixel_format; + + return rval; +} + +static int vidioc_enum_frameintervals(struct file *file, void *fh, + struct v4l2_frmivalenum *frmi) +{ + struct omap34xxcam_fh *ofh = fh; + struct omap34xxcam_videodev *vdev = ofh->vdev; + u32 pixel_format; + int rval; + + pixel_format = frmi->pixel_format; + frmi->pixel_format = V4L2_PIX_FMT_SGRBG10; /* We can accept any. */ + + mutex_lock(&vdev->mutex); + rval = vidioc_int_enum_frameintervals(vdev->vdev_sensor, frmi); + mutex_unlock(&vdev->mutex); + + frmi->pixel_format = pixel_format; + + return rval; +} + +/** + * vidioc_default - private IOCTL handler + * @file: ptr. to system file structure + * @fh: ptr to hold address of omap34xxcam_fh struct (per-filehandle data) + * @cmd: ioctl cmd value + * @arg: ioctl arg value + * + * If the sensor being used is a "smart sensor", this request is returned to + * caller with -EINVAL err code. Otherwise if the control id is the private + * VIDIOC_PRIVATE_ISP_AEWB_REQ to update the analog gain or exposure, + * then this request is forwared directly to the sensor to incorporate the + * feedback. The request is then passed on to the ISP private IOCTL handler, + * isp_handle_private() + */ +static int vidioc_default(struct file *file, void *fh, int cmd, void *arg) +{ + struct omap34xxcam_fh *ofh = file->private_data; + struct omap34xxcam_videodev *vdev = ofh->vdev; + int rval; + + if (vdev->vdev_sensor_config.sensor_isp) { + rval = -EINVAL; + } else { + switch (cmd) { + case VIDIOC_ENUM_FRAMESIZES: + rval = vidioc_enum_framesizes(file, fh, arg); + goto out; + case VIDIOC_ENUM_FRAMEINTERVALS: + rval = vidioc_enum_frameintervals(file, fh, arg); + goto out; + case VIDIOC_PRIVATE_ISP_AEWB_REQ: + { + /* Need to update sensor first */ + struct isph3a_aewb_data *data; + struct v4l2_control vc; + + data = (struct isph3a_aewb_data *) arg; + if (data->update & SET_EXPOSURE) { + vc.id = V4L2_CID_EXPOSURE; + vc.value = data->shutter; + mutex_lock(&vdev->mutex); + rval = vidioc_int_s_ctrl(vdev->vdev_sensor, + &vc); + mutex_unlock(&vdev->mutex); + if (rval) + goto out; + } + if (data->update & SET_ANALOG_GAIN) { + vc.id = V4L2_CID_GAIN; + vc.value = data->gain; + mutex_lock(&vdev->mutex); + rval = vidioc_int_s_ctrl(vdev->vdev_sensor, + &vc); + mutex_unlock(&vdev->mutex); + if (rval) + goto out; + } + } + break; + case VIDIOC_PRIVATE_ISP_AF_REQ: { + /* Need to update lens first */ + struct isp_af_data *data; + struct v4l2_control vc; + + if (!vdev->vdev_lens) { + rval = -EINVAL; + goto out; + } + data = (struct isp_af_data *) arg; + if (data->update & LENS_DESIRED_POSITION) { + vc.id = V4L2_CID_FOCUS_ABSOLUTE; + vc.value = data->desired_lens_direction; + mutex_lock(&vdev->mutex); + rval = vidioc_int_s_ctrl(vdev->vdev_lens, &vc); + mutex_unlock(&vdev->mutex); + if (rval) + goto out; + } + if (data->update & REQUEST_STATISTICS) { + vc.id = V4L2_CID_FOCUS_ABSOLUTE; + mutex_lock(&vdev->mutex); + rval = vidioc_int_g_ctrl(vdev->vdev_lens, &vc); + mutex_unlock(&vdev->mutex); + if (rval) + goto out; + data->xtrastats.lens_position = vc.value; + } + } + break; + } + + mutex_lock(&vdev->mutex); + rval = isp_handle_private(cmd, arg); + mutex_unlock(&vdev->mutex); + } +out: + return rval; +} + +/* + * + * File operations. + * + */ + +static long omap34xxcam_unlocked_ioctl(struct file *file, unsigned int cmd, + unsigned long arg) +{ + return (long)video_ioctl2(file->f_dentry->d_inode, file, cmd, arg); +} + +/** + * omap34xxcam_poll - file operations poll handler + * @file: ptr. to system file structure + * @wait: system poll table structure + * + */ +static unsigned int omap34xxcam_poll(struct file *file, + struct poll_table_struct *wait) +{ + struct omap34xxcam_fh *fh = file->private_data; + struct omap34xxcam_videodev *vdev = fh->vdev; + struct videobuf_buffer *vb; + + mutex_lock(&vdev->mutex); + if (vdev->streaming != file) { + mutex_unlock(&vdev->mutex); + return POLLERR; + } + mutex_unlock(&vdev->mutex); + + mutex_lock(&fh->vbq.vb_lock); + if (list_empty(&fh->vbq.stream)) { + mutex_unlock(&fh->vbq.vb_lock); + return POLLERR; + } + vb = list_entry(fh->vbq.stream.next, struct videobuf_buffer, stream); + mutex_unlock(&fh->vbq.vb_lock); + + poll_wait(file, &vb->done, wait); + + if (vb->state == VIDEOBUF_DONE || vb->state == VIDEOBUF_ERROR) + return POLLIN | POLLRDNORM; + + return 0; +} + +/** + * omap34xxcam_mmap - file operations mmap handler + * @file: ptr. to system file structure + * @vma: system virt. mem. area structure + * + * Maps a virtual memory area via the video buffer API + */ +static int omap34xxcam_mmap(struct file *file, struct vm_area_struct *vma) +{ + struct omap34xxcam_fh *fh = file->private_data; + return videobuf_mmap_mapper(&fh->vbq, vma); +} + +/** + * omap34xxcam_open - file operations open handler + * @inode: ptr. to system inode structure + * @file: ptr. to system file structure + * + * Allocates and initializes the per-filehandle data (omap34xxcam_fh), + * enables the sensor, opens/initializes the ISP interface and the + * video buffer queue. Note that this function will allow multiple + * file handles to be open simultaneously, however only the first + * handle opened will initialize the ISP. It is the application + * responsibility to only use one handle for streaming and the others + * for control only. + * This function returns 0 upon success and -ENODEV upon error. + */ +static int omap34xxcam_open(struct inode *inode, struct file *file) +{ + struct omap34xxcam_videodev *vdev = NULL; + struct omap34xxcam_device *cam = omap34xxcam; + struct omap34xxcam_fh *fh; + struct v4l2_format format; + int i; + + for (i = 0; i < OMAP34XXCAM_VIDEODEVS; i++) { + if (cam->vdevs[i].vfd + && cam->vdevs[i].vfd->minor == iminor(inode)) { + vdev = &cam->vdevs[i]; + break; + } + } + + if (!vdev || !vdev->vfd) + return -ENODEV; + + fh = kzalloc(sizeof(*fh), GFP_KERNEL); + if (fh == NULL) + return -ENOMEM; + + mutex_lock(&vdev->mutex); + for (i = 0; i <= OMAP34XXCAM_SLAVE_FLASH; i++) { + if (vdev->slave[i] != v4l2_int_device_dummy() + && !try_module_get(vdev->slave[i]->module)) { + mutex_unlock(&vdev->mutex); + goto out_try_module_get; + } + } + + if (atomic_inc_return(&vdev->users) == 1) { + isp_get(); + if (omap34xxcam_slave_power_set(vdev, V4L2_POWER_ON, + OMAP34XXCAM_SLAVE_POWER_ALL)) + goto out_slave_power_set_standby; + omap34xxcam_slave_power_set( + vdev, V4L2_POWER_STANDBY, + OMAP34XXCAM_SLAVE_POWER_SENSOR); + omap34xxcam_slave_power_suggest( + vdev, V4L2_POWER_STANDBY, + OMAP34XXCAM_SLAVE_POWER_LENS); + } + + fh->vdev = vdev; + + /* FIXME: Check that we have sensor now... */ + if (vdev->vdev_sensor_config.sensor_isp) + vidioc_int_g_fmt_cap(vdev->vdev_sensor, &format); + else + isp_g_fmt_cap(&format.fmt.pix); + + mutex_unlock(&vdev->mutex); + /* FIXME: how about fh->pix when there are more users? */ + fh->pix = format.fmt.pix; + + file->private_data = fh; + + spin_lock_init(&fh->vbq_lock); + + videobuf_queue_sg_init(&fh->vbq, &omap34xxcam_vbq_ops, NULL, + &fh->vbq_lock, V4L2_BUF_TYPE_VIDEO_CAPTURE, + V4L2_FIELD_NONE, + sizeof(struct videobuf_buffer), fh); + + return 0; + +out_slave_power_set_standby: + omap34xxcam_slave_power_set(vdev, V4L2_POWER_OFF, + OMAP34XXCAM_SLAVE_POWER_ALL); + isp_put(); + atomic_dec(&vdev->users); + mutex_unlock(&vdev->mutex); + +out_try_module_get: + for (i--; i >= 0; i--) + if (vdev->slave[i] != v4l2_int_device_dummy()) + module_put(vdev->slave[i]->module); + + kfree(fh); + + return -ENODEV; +} + +/** + * omap34xxcam_release - file operations release handler + * @inode: ptr. to system inode structure + * @file: ptr. to system file structure + * + * Complement of omap34xxcam_open. This function will flush any scheduled + * work, disable the sensor, close the ISP interface, stop the + * video buffer queue from streaming and free the per-filehandle data + * (omap34xxcam_fh). Note that because multiple open file handles + * are allowed, this function will only close the ISP and disable the + * sensor when the last open file handle (by count) is closed. + * This function returns 0. + */ +static int omap34xxcam_release(struct inode *inode, struct file *file) +{ + struct omap34xxcam_fh *fh = file->private_data; + struct omap34xxcam_videodev *vdev = fh->vdev; + int i; + + mutex_lock(&vdev->mutex); + if (vdev->streaming == file) { + isp_stop(); + videobuf_streamoff(&fh->vbq); + omap34xxcam_slave_power_set( + vdev, V4L2_POWER_STANDBY, + OMAP34XXCAM_SLAVE_POWER_SENSOR); + omap34xxcam_slave_power_suggest( + vdev, V4L2_POWER_STANDBY, + OMAP34XXCAM_SLAVE_POWER_LENS); + vdev->streaming = NULL; + } + + if (atomic_dec_return(&vdev->users) == 0) { + omap34xxcam_slave_power_set(vdev, V4L2_POWER_OFF, + OMAP34XXCAM_SLAVE_POWER_ALL); + isp_put(); + } + mutex_unlock(&vdev->mutex); + + file->private_data = NULL; + + for (i = 0; i <= OMAP34XXCAM_SLAVE_FLASH; i++) + if (vdev->slave[i] != v4l2_int_device_dummy()) + module_put(vdev->slave[i]->module); + + kfree(fh); + + return 0; +} + +static struct file_operations omap34xxcam_fops = { + .owner = THIS_MODULE, + .llseek = no_llseek, + .unlocked_ioctl = omap34xxcam_unlocked_ioctl, + .poll = omap34xxcam_poll, + .mmap = omap34xxcam_mmap, + .open = omap34xxcam_open, + .release = omap34xxcam_release, +}; + +static void omap34xxcam_vfd_name_update(struct omap34xxcam_videodev *vdev) +{ + struct video_device *vfd = vdev->vfd; + int i; + + strlcpy(vfd->name, CAM_SHORT_NAME, sizeof(vfd->name)); + for (i = 0; i <= OMAP34XXCAM_SLAVE_FLASH; i++) { + strlcat(vfd->name, "/", sizeof(vfd->name)); + if (vdev->slave[i] == v4l2_int_device_dummy()) + continue; + strlcat(vfd->name, vdev->slave[i]->name, sizeof(vfd->name)); + } + dev_info(vdev->cam->dev, "video%d is now %s\n", vfd->minor, vfd->name); +} + +/** + * omap34xxcam_device_unregister - V4L2 detach handler + * @s: ptr. to standard V4L2 device information structure + * + * Detach sensor and unregister and release the video device. + */ +static void omap34xxcam_device_unregister(struct v4l2_int_device *s) +{ + struct omap34xxcam_videodev *vdev = s->u.slave->master->priv; + struct omap34xxcam_hw_config hwc; + + BUG_ON(vidioc_int_g_priv(s, &hwc) < 0); + + mutex_lock(&vdev->mutex); + + if (vdev->slave[hwc.dev_type] != v4l2_int_device_dummy()) { + vdev->slave[hwc.dev_type] = v4l2_int_device_dummy(); + vdev->slaves--; + omap34xxcam_vfd_name_update(vdev); + } + + if (vdev->slaves == 0 && vdev->vfd) { + if (vdev->vfd->minor == -1) { + /* + * The device was never registered, so release the + * video_device struct directly. + */ + video_device_release(vdev->vfd); + } else { + /* + * The unregister function will release the + * video_device struct as well as + * unregistering it. + */ + video_unregister_device(vdev->vfd); + } + vdev->vfd = NULL; + } + + mutex_unlock(&vdev->mutex); +} + +static const struct v4l2_ioctl_ops omap34xxcam_ioctl_ops = { + .vidioc_querycap = vidioc_querycap, + .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap, + .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap, + .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap, + .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap, + .vidioc_reqbufs = vidioc_reqbufs, + .vidioc_querybuf = vidioc_querybuf, + .vidioc_qbuf = vidioc_qbuf, + .vidioc_dqbuf = vidioc_dqbuf, + .vidioc_streamon = vidioc_streamon, + .vidioc_streamoff = vidioc_streamoff, + .vidioc_enum_input = vidioc_enum_input, + .vidioc_g_input = vidioc_g_input, + .vidioc_s_input = vidioc_s_input, + .vidioc_queryctrl = vidioc_queryctrl, + .vidioc_querymenu = vidioc_querymenu, + .vidioc_g_ext_ctrls = vidioc_g_ext_ctrls, + .vidioc_s_ext_ctrls = vidioc_s_ext_ctrls, + .vidioc_g_parm = vidioc_g_parm, + .vidioc_s_parm = vidioc_s_parm, + .vidioc_cropcap = vidioc_cropcap, + .vidioc_g_crop = vidioc_g_crop, + .vidioc_s_crop = vidioc_s_crop, + .vidioc_default = vidioc_default, +}; + +/** + * omap34xxcam_device_register - V4L2 attach handler + * @s: ptr. to standard V4L2 device information structure + * + * Allocates and initializes the V4L2 video_device structure, initializes + * the sensor, and finally + registers the device with V4L2 based on the + * video_device structure. + * + * Returns 0 on success, otherwise an appropriate error code on + * failure. + */ +static int omap34xxcam_device_register(struct v4l2_int_device *s) +{ + struct omap34xxcam_videodev *vdev = s->u.slave->master->priv; + struct omap34xxcam_device *cam = vdev->cam; + struct omap34xxcam_hw_config hwc; + struct video_device *vfd; + int rval; + + /* We need to check rval just once. The place is here. */ + if (vidioc_int_g_priv(s, &hwc)) + return -ENODEV; + + if (vdev->index != hwc.dev_index) + return -ENODEV; + + if (hwc.dev_type < 0 || hwc.dev_type > OMAP34XXCAM_SLAVE_FLASH) + return -EINVAL; + + if (vdev->slave[hwc.dev_type] != v4l2_int_device_dummy()) + return -EBUSY; + + mutex_lock(&vdev->mutex); + if (atomic_read(&vdev->users)) { + dev_err(cam->dev, "we're open (%d), can't register\n", + atomic_read(&vdev->users)); + mutex_unlock(&vdev->mutex); + return -EBUSY; + } + + vdev->slaves++; + vdev->slave[hwc.dev_type] = s; + vdev->slave_config[hwc.dev_type] = hwc; + + if (hwc.dev_type == OMAP34XXCAM_SLAVE_SENSOR) + isp_get(); + rval = omap34xxcam_slave_power_set(vdev, V4L2_POWER_ON, + 1 << hwc.dev_type); + if (!rval && hwc.dev_type == OMAP34XXCAM_SLAVE_SENSOR) { + struct v4l2_format format; + struct v4l2_streamparm a; + + format.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; + rval = vidioc_int_g_fmt_cap(vdev->vdev_sensor, &format); + + a.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; + rval |= vidioc_int_g_parm(vdev->vdev_sensor, &a); + if (rval) + rval = -EBUSY; + + vdev->want_pix = format.fmt.pix; + vdev->want_timeperframe = a.parm.capture.timeperframe; + } + omap34xxcam_slave_power_set(vdev, V4L2_POWER_OFF, 1 << hwc.dev_type); + if (hwc.dev_type == OMAP34XXCAM_SLAVE_SENSOR) + isp_put(); + + if (rval) + goto err; + + /* Are we the first slave? */ + if (vdev->slaves == 1) { + /* initialize the video_device struct */ + vdev->vfd = video_device_alloc(); + vfd = vdev->vfd; + if (!vfd) { + dev_err(cam->dev, + "could not allocate video device struct\n"); + return -ENOMEM; + } + vfd->release = video_device_release; + vfd->minor = -1; + vfd->fops = &omap34xxcam_fops; + vfd->ioctl_ops = &omap34xxcam_ioctl_ops; + video_set_drvdata(vfd, vdev); + + if (video_register_device(vfd, VFL_TYPE_GRABBER, + hwc.dev_minor) < 0) { + dev_err(cam->dev, + "could not register V4L device\n"); + vfd->minor = -1; + rval = -EBUSY; + goto err; + } + } else { + vfd = vdev->vfd; + } + + omap34xxcam_vfd_name_update(vdev); + + mutex_unlock(&vdev->mutex); + + return 0; + +err: + if (s == vdev->slave[hwc.dev_type]) { + vdev->slave[hwc.dev_type] = v4l2_int_device_dummy(); + vdev->slaves--; + } + + mutex_unlock(&vdev->mutex); + omap34xxcam_device_unregister(s); + + return rval; +} + +static struct v4l2_int_master omap34xxcam_master = { + .attach = omap34xxcam_device_register, + .detach = omap34xxcam_device_unregister, +}; + +/* + * + * Driver Suspend/Resume + * + */ + +#ifdef CONFIG_PM +/** + * omap34xxcam_suspend - platform driver PM suspend handler + * @pdev: ptr. to platform level device information structure + * @state: power state + * + * If applicable, stop capture and disable sensor. + * + * Returns 0 always + */ +static int omap34xxcam_suspend(struct platform_device *pdev, pm_message_t state) +{ + struct omap34xxcam_videodev *vdev = platform_get_drvdata(pdev); + + if (atomic_read(&vdev->users) == 0) + return 0; + + if (vdev->streaming) { + isp_stop(); + omap34xxcam_slave_power_set(vdev, V4L2_POWER_OFF, + OMAP34XXCAM_SLAVE_POWER_ALL); + } + + return 0; +} + +/** + * omap34xxcam_resume - platform driver PM resume handler + * @pdev: ptr. to platform level device information structure + * + * If applicable, resume capture and enable sensor. + * + * Returns 0 always + */ +static int omap34xxcam_resume(struct platform_device *pdev) +{ + struct omap34xxcam_videodev *vdev = platform_get_drvdata(pdev); + + if (atomic_read(&vdev->users) == 0) + return 0; + + if (vdev->streaming) { + omap34xxcam_slave_power_set(vdev, V4L2_POWER_ON, + OMAP34XXCAM_SLAVE_POWER_ALL); + isp_start(); + } + + return 0; +} +#endif + +/* + * + * Driver initialisation and deinitialisation. + * + */ + +/** + * omap34xxcam_remove - platform driver remove handler + * @pdev: ptr. to platform level device information structure + * + * Unregister device with V4L2, unmap camera registers, and + * free camera device information structure (omap34xxcam_device). + * + * Returns 0 always. + */ +static int omap34xxcam_remove(struct platform_device *pdev) +{ + struct omap34xxcam_device *cam = platform_get_drvdata(pdev); + int i; + + if (!cam) + return 0; + + for (i = 0; i < OMAP34XXCAM_VIDEODEVS; i++) { + if (cam->vdevs[i].cam == NULL) + continue; + + v4l2_int_device_unregister(&cam->vdevs[i].master); + cam->vdevs[i].cam = NULL; + } + + omap34xxcam = NULL; + + kfree(cam); + + return 0; +} + +/** + * omap34xxcam_probe - platform driver probe handler + * @pdev: ptr. to platform level device information structure + * + * Allocates and initializes camera device information structure + * (omap34xxcam_device), maps the device registers and gets the + * device IRQ. Registers the device as a V4L2 client. + * + * Returns 0 on success or -ENODEV on failure. + */ +static int omap34xxcam_probe(struct platform_device *pdev) +{ + struct omap34xxcam_device *cam; + struct isp_sysc isp_sysconfig; + int i; + + cam = kzalloc(sizeof(*cam), GFP_KERNEL); + if (!cam) { + dev_err(&pdev->dev, "could not allocate memory\n"); + goto err; + } + + platform_set_drvdata(pdev, cam); + + cam->dev = &pdev->dev; + + isp_get(); + isp_sysconfig.reset = 0; + isp_sysconfig.idle_mode = 1; + isp_power_settings(isp_sysconfig); + isp_put(); + + omap34xxcam = cam; + + for (i = 0; i < OMAP34XXCAM_VIDEODEVS; i++) { + struct omap34xxcam_videodev *vdev = &cam->vdevs[i]; + struct v4l2_int_device *m = &vdev->master; + + m->module = THIS_MODULE; + strlcpy(m->name, CAM_NAME, sizeof(m->name)); + m->type = v4l2_int_type_master; + m->u.master = &omap34xxcam_master; + m->priv = vdev; + + mutex_init(&vdev->mutex); + vdev->index = i; + vdev->cam = cam; + vdev->vdev_sensor = + vdev->vdev_lens = + vdev->vdev_flash = v4l2_int_device_dummy(); + setup_timer(&vdev->poweroff_timer, + omap34xxcam_slave_power_timer, (unsigned long)vdev); + INIT_WORK(&vdev->poweroff_work, omap34xxcam_slave_power_work); + + if (v4l2_int_device_register(m)) + goto err; + } + + return 0; + +err: + omap34xxcam_remove(pdev); + return -ENODEV; +} + +static struct platform_driver omap34xxcam_driver = { + .probe = omap34xxcam_probe, + .remove = omap34xxcam_remove, +#ifdef CONFIG_PM + .suspend = omap34xxcam_suspend, + .resume = omap34xxcam_resume, +#endif + .driver = { + .name = CAM_NAME, + }, +}; + +/* + * + * Module initialisation and deinitialisation + * + */ + +/** + * omap34xxcam_init - module_init function + * + * Calls platfrom driver to register probe, remove, + * suspend and resume functions. + * + */ +static int __init omap34xxcam_init(void) +{ + return platform_driver_register(&omap34xxcam_driver); +} + +/** + * omap34xxcam_cleanup - module_exit function + * + * Calls platfrom driver to unregister probe, remove, + * suspend and resume functions. + * + */ +static void __exit omap34xxcam_cleanup(void) +{ + platform_driver_unregister(&omap34xxcam_driver); +} + +MODULE_AUTHOR("Sakari Ailus <sakari.ailus@xxxxxxxxx"); +MODULE_DESCRIPTION("OMAP34xx Video for Linux camera driver"); +MODULE_LICENSE("GPL"); + +late_initcall(omap34xxcam_init); +module_exit(omap34xxcam_cleanup); diff --git a/drivers/media/video/omap34xxcam.h b/drivers/media/video/omap34xxcam.h new file mode 100644 index 0000000..cc024eb --- /dev/null +++ b/drivers/media/video/omap34xxcam.h @@ -0,0 +1,215 @@ +/* + * drivers/media/video/omap34xxcam.c + * + * Copyright (C) 2006--2008 Nokia Corporation + * Copyright (C) 2007, 2008 Texas Instruments + * + * Contact: Sakari Ailus <sakari.ailus@xxxxxxxxx> + * Tuukka Toivonen <tuukka.o.toivonen@xxxxxxxxx> + * + * Originally based on the OMAP 2 camera driver. + * + * Written by Sakari Ailus <sakari.ailus@xxxxxxxxx> + * Tuukka Toivonen <tuukka.o.toivonen@xxxxxxxxx> + * Sergio Aguirre <saaguirre@xxxxxx> + * Mohit Jalori + * Sameer Venkatraman + * Leonides Martinez + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * version 2 as published by the Free Software Foundation. + * + * 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., 51 Franklin St, Fifth Floor, Boston, MA + * 02110-1301 USA + * + */ + +#ifndef OMAP34XXCAM_H +#define OMAP34XXCAM_H + +#include <media/v4l2-int-device.h> +#include "isp/isp.h" + +#define CAM_NAME "omap34xxcam" +#define CAM_SHORT_NAME "omap3" + +#define OMAP_ISP_AF (1 << 4) +#define OMAP_ISP_HIST (1 << 5) +#define OMAP34XXCAM_XCLK_NONE -1 +#define OMAP34XXCAM_XCLK_A 0 +#define OMAP34XXCAM_XCLK_B 1 + +#define OMAP34XXCAM_SLAVE_SENSOR 0 +#define OMAP34XXCAM_SLAVE_LENS 1 +#define OMAP34XXCAM_SLAVE_FLASH 2 /* This is the last slave! */ + +/* mask for omap34xxcam_slave_power_set */ +#define OMAP34XXCAM_SLAVE_POWER_SENSOR (1 << OMAP34XXCAM_SLAVE_SENSOR) +#define OMAP34XXCAM_SLAVE_POWER_LENS (1 << OMAP34XXCAM_SLAVE_LENS) +#define OMAP34XXCAM_SLAVE_POWER_SENSOR_LENS \ + (OMAP34XXCAM_SLAVE_POWER_SENSOR | OMAP34XXCAM_SLAVE_POWER_LENS) +#define OMAP34XXCAM_SLAVE_POWER_FLASH (1 << OMAP34XXCAM_SLAVE_FLASH) +#define OMAP34XXCAM_SLAVE_POWER_ALL -1 + +#define OMAP34XXCAM_VIDEODEVS 4 + +struct omap34xxcam_device; +struct omap34xxcam_videodev; + +struct omap34xxcam_sensor_config { + int xclk; + int sensor_isp; + u32 capture_mem; +}; + +struct omap34xxcam_lens_config { +}; + +struct omap34xxcam_flash_config { +}; + +/** + * struct omap34xxcam_hw_config - struct for vidioc_int_g_priv ioctl + * @xclk: OMAP34XXCAM_XCLK_A or OMAP34XXCAM_XCLK_B + * @sensor_isp: Is sensor smart/SOC or raw + * @s_pix_sparm: Access function to set pix and sparm. + * Pix will override sparm + */ +struct omap34xxcam_hw_config { + int dev_index; /* Index in omap34xxcam_sensors */ + int dev_minor; /* Video device minor number */ + int dev_type; /* OMAP34XXCAM_SLAVE_* */ + union { + struct omap34xxcam_sensor_config sensor; + struct omap34xxcam_lens_config lens; + struct omap34xxcam_flash_config flash; + } u; +}; + +/** + * struct omap34xxcam_videodev - per /dev/video* structure + * @mutex: serialises access to this structure + * @cam: pointer to cam hw structure + * @master: we are v4l2_int_device master + * @sensor: sensor device + * @lens: lens device + * @flash: flash device + * @slaves: how many slaves we have at the moment + * @vfd: our video device + * @capture_mem: maximum kernel-allocated capture memory + * @if_u: sensor interface stuff + * @index: index of this structure in cam->vdevs + * @users: how many users we have + * @power_state: Current power state + * @power_state_wish: New power state when poweroff_timer expires + * @power_state_mask: Bitmask of devices to set the new power state + * @poweroff_timer: Timer for dispatching poweroff_work + * @poweroff_work: Work for slave power state change + * @sensor_config: ISP-speicific sensor configuration + * @lens_config: ISP-speicific lens configuration + * @flash_config: ISP-speicific flash configuration + * @streaming: streaming file handle, if streaming is enabled + */ +struct omap34xxcam_videodev { + struct mutex mutex; /* serialises access to this structure */ + + struct omap34xxcam_device *cam; + struct v4l2_int_device master; + +#define vdev_sensor slave[OMAP34XXCAM_SLAVE_SENSOR] +#define vdev_lens slave[OMAP34XXCAM_SLAVE_LENS] +#define vdev_flash slave[OMAP34XXCAM_SLAVE_FLASH] + struct v4l2_int_device *slave[OMAP34XXCAM_SLAVE_FLASH + 1]; + + /* number of slaves attached */ + int slaves; + + /*** video device parameters ***/ + struct video_device *vfd; + int capture_mem; + + /*** general driver state information ***/ + /* + * Sensor interface parameters: interface type, CC_CTRL + * register value and interface specific data. + */ + u32 xclk; + /* index to omap34xxcam_videodevs of this structure */ + int index; + atomic_t users; + enum v4l2_power power_state[OMAP34XXCAM_SLAVE_FLASH + 1]; + enum v4l2_power power_state_wish; + int power_state_mask; + struct timer_list poweroff_timer; + struct work_struct poweroff_work; + +#define vdev_sensor_config slave_config[OMAP34XXCAM_SLAVE_SENSOR].u.sensor +#define vdev_lens_config slave_config[OMAP34XXCAM_SLAVE_LENS].u.lens +#define vdev_flash_config slave_config[OMAP34XXCAM_SLAVE_FLASH].u.flash + struct omap34xxcam_hw_config slave_config[OMAP34XXCAM_SLAVE_FLASH + 1]; + + /*** capture data ***/ + struct v4l2_fract want_timeperframe; + struct v4l2_pix_format want_pix; + /* file handle, if streaming is on */ + struct file *streaming; +}; + +/** + * struct omap34xxcam_device - per-device data structure + * @mutex: mutex serialises access to this structure + * @sgdma_in_queue: Number or sgdma requests in scatter-gather queue, + * protected by the lock above. + * @sgdma: ISP sgdma subsystem information structure + * @dma_notify: DMA notify flag + * @irq: irq number platform HW resource + * @mmio_base: register map memory base (platform HW resource) + * @mmio_base_phys: register map memory base physical address + * @mmio_size: register map memory size + * @dev: device structure + * @vdevs: /dev/video specific structures + * @fck: camera module fck clock information + * @ick: camera module ick clock information + */ +struct omap34xxcam_device { + struct mutex mutex; /* serialises access to this structure */ + int sgdma_in_queue; + struct isp_sgdma sgdma; + int dma_notify; + + /*** interfaces and device ***/ + struct device *dev; + struct omap34xxcam_videodev vdevs[OMAP34XXCAM_VIDEODEVS]; + + /*** camera module clocks ***/ + struct clk *fck; + struct clk *ick; + bool sensor_if_enabled; +}; + +/** + * struct omap34xxcam_fh - per-filehandle data structure + * @vbq_lock: spinlock for the videobuf queue + * @vbq: V4L2 video buffer queue structure + * @pix: V4L2 pixel format structure (serialise pix by vbq->lock) + * @field_count: field counter for videobuf_buffer + * @vdev: our /dev/video specific structure + */ +struct omap34xxcam_fh { + spinlock_t vbq_lock; /* spinlock for the videobuf queue */ + struct videobuf_queue vbq; + struct v4l2_pix_format pix; + atomic_t field_count; + /* accessing cam here doesn't need serialisation: it's constant */ + struct omap34xxcam_videodev *vdev; +}; + +#endif /* ifndef OMAP34XXCAM_H */ -- 1.5.6.5 -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html