diff options
Diffstat (limited to 'drivers/media/video/mxc/capture/csi_v4l2_capture.c')
| -rw-r--r-- | drivers/media/video/mxc/capture/csi_v4l2_capture.c | 1466 |
1 files changed, 1466 insertions, 0 deletions
diff --git a/drivers/media/video/mxc/capture/csi_v4l2_capture.c b/drivers/media/video/mxc/capture/csi_v4l2_capture.c new file mode 100644 index 000000000000..cf224e0673f0 --- /dev/null +++ b/drivers/media/video/mxc/capture/csi_v4l2_capture.c @@ -0,0 +1,1466 @@ +/* + * Copyright 2009-2010 Freescale Semiconductor, Inc. All Rights Reserved. + */ + +/* + * The code contained herein is licensed under the GNU General Public + * License. You may obtain a copy of the GNU General Public License + * Version 2 or later at the following locations: + * + * http://www.opensource.org/licenses/gpl-license.html + * http://www.gnu.org/copyleft/gpl.html + */ + +/*! + * @file drivers/media/video/mxc/capture/csi_v4l2_capture.c + * This file is derived from mxc_v4l2_capture.c + * + * @brief MX25 Video For Linux 2 driver + * + * @ingroup MXC_V4L2_CAPTURE + */ +#include <linux/version.h> +#include <linux/module.h> +#include <linux/init.h> +#include <linux/platform_device.h> +#include <linux/fs.h> +#include <linux/slab.h> +#include <linux/ctype.h> +#include <linux/io.h> +#include <linux/semaphore.h> +#include <linux/pagemap.h> +#include <linux/vmalloc.h> +#include <linux/types.h> +#include <linux/fb.h> +#include <linux/dma-mapping.h> +#include <media/v4l2-ioctl.h> +#include <media/v4l2-int-device.h> +#include <linux/mxcfb.h> +#include "mxc_v4l2_capture.h" +#include "fsl_csi.h" + +static int video_nr = -1; +static cam_data *g_cam; + +static int csi_v4l2_master_attach(struct v4l2_int_device *slave); +static void csi_v4l2_master_detach(struct v4l2_int_device *slave); +static u8 camera_power(cam_data *cam, bool cameraOn); + +/*! Information about this driver. */ +static struct v4l2_int_master csi_v4l2_master = { + .attach = csi_v4l2_master_attach, + .detach = csi_v4l2_master_detach, +}; + +static struct v4l2_int_device csi_v4l2_int_device = { + .module = THIS_MODULE, + .name = "csi_v4l2_cap", + .type = v4l2_int_type_master, + .u = { + .master = &csi_v4l2_master, + }, +}; + +/*! + * Camera V4l2 callback function. + * + * @param mask u32 + * @param dev void device structure + * + * @return none + */ +static void camera_callback(u32 mask, void *dev) +{ + struct mxc_v4l_frame *done_frame; + struct mxc_v4l_frame *ready_frame; + cam_data *cam; + + cam = (cam_data *) dev; + if (cam == NULL) + return; + + if (list_empty(&cam->working_q)) { + pr_err("ERROR: v4l2 capture: %s: " + "working queue empty\n", __func__); + return; + } + + done_frame = + list_entry(cam->working_q.next, struct mxc_v4l_frame, queue); + if (done_frame->buffer.flags & V4L2_BUF_FLAG_QUEUED) { + done_frame->buffer.flags |= V4L2_BUF_FLAG_DONE; + done_frame->buffer.flags &= ~V4L2_BUF_FLAG_QUEUED; + if (list_empty(&cam->ready_q)) { + cam->skip_frame++; + } else { + ready_frame = list_entry(cam->ready_q.next, + struct mxc_v4l_frame, queue); + list_del(cam->ready_q.next); + list_add_tail(&ready_frame->queue, &cam->working_q); + + if (cam->ping_pong_csi == 1) { + __raw_writel(cam->frame[ready_frame->index]. + paddress, CSI_CSIDMASA_FB1); + } else { + __raw_writel(cam->frame[ready_frame->index]. + paddress, CSI_CSIDMASA_FB2); + } + } + + /* Added to the done queue */ + list_del(cam->working_q.next); + list_add_tail(&done_frame->queue, &cam->done_q); + cam->enc_counter++; + wake_up_interruptible(&cam->enc_queue); + } else { + pr_err("ERROR: v4l2 capture: %s: " + "buffer not queued\n", __func__); + } + + return; +} + +/*! + * Make csi ready for capture image. + * + * @param cam structure cam_data * + * + * @return status 0 success + */ +static int csi_cap_image(cam_data *cam) +{ + unsigned int value; + + value = __raw_readl(CSI_CSICR3); + __raw_writel(value | BIT_DMA_REFLASH_RFF | BIT_FRMCNT_RST, CSI_CSICR3); + value = __raw_readl(CSI_CSISR); + __raw_writel(value, CSI_CSISR); + + return 0; +} + +/*************************************************************************** + * Functions for handling Frame buffers. + **************************************************************************/ + +/*! + * Free frame buffers + * + * @param cam Structure cam_data * + * + * @return status 0 success. + */ +static int csi_free_frame_buf(cam_data *cam) +{ + int i; + + pr_debug("MVC: In %s\n", __func__); + + for (i = 0; i < FRAME_NUM; i++) { + if (cam->frame[i].vaddress != 0) { + dma_free_coherent(0, cam->frame[i].buffer.length, + cam->frame[i].vaddress, + cam->frame[i].paddress); + cam->frame[i].vaddress = 0; + } + } + + return 0; +} + +/*! + * Allocate frame buffers + * + * @param cam Structure cam_data * + * @param count int number of buffer need to allocated + * + * @return status -0 Successfully allocated a buffer, -ENOBUFS failed. + */ +static int csi_allocate_frame_buf(cam_data *cam, int count) +{ + int i; + + pr_debug("In MVC:%s- size=%d\n", + __func__, cam->v2f.fmt.pix.sizeimage); + for (i = 0; i < count; i++) { + cam->frame[i].vaddress = dma_alloc_coherent(0, PAGE_ALIGN + (cam->v2f.fmt. + pix.sizeimage), + &cam->frame[i]. + paddress, + GFP_DMA | + GFP_KERNEL); + if (cam->frame[i].vaddress == 0) { + pr_err("ERROR: v4l2 capture: " + "%s failed.\n", __func__); + csi_free_frame_buf(cam); + return -ENOBUFS; + } + cam->frame[i].buffer.index = i; + cam->frame[i].buffer.flags = V4L2_BUF_FLAG_MAPPED; + cam->frame[i].buffer.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; + cam->frame[i].buffer.length = PAGE_ALIGN(cam->v2f.fmt. + pix.sizeimage); + cam->frame[i].buffer.memory = V4L2_MEMORY_MMAP; + cam->frame[i].buffer.m.offset = cam->frame[i].paddress; + cam->frame[i].index = i; + } + + return 0; +} + +/*! + * Free frame buffers status + * + * @param cam Structure cam_data * + * + * @return none + */ +static void csi_free_frames(cam_data *cam) +{ + int i; + + pr_debug("In MVC: %s\n", __func__); + + for (i = 0; i < FRAME_NUM; i++) + cam->frame[i].buffer.flags = V4L2_BUF_FLAG_MAPPED; + + cam->skip_frame = 0; + INIT_LIST_HEAD(&cam->ready_q); + INIT_LIST_HEAD(&cam->working_q); + INIT_LIST_HEAD(&cam->done_q); + + return; +} + +/*! + * Return the buffer status + * + * @param cam Structure cam_data * + * @param buf Structure v4l2_buffer * + * + * @return status 0 success, EINVAL failed. + */ +static int csi_v4l2_buffer_status(cam_data *cam, struct v4l2_buffer *buf) +{ + pr_debug("In MVC: %s\n", __func__); + + if (buf->index < 0 || buf->index >= FRAME_NUM) { + pr_err("ERROR: v4l2 capture: %s buffers " + "not allocated\n", __func__); + return -EINVAL; + } + + memcpy(buf, &(cam->frame[buf->index].buffer), sizeof(*buf)); + + return 0; +} + +/*! + * Indicates whether the palette is supported. + * + * @param palette V4L2_PIX_FMT_RGB565, V4L2_PIX_FMT_UYVY or V4L2_PIX_FMT_YUV420 + * + * @return 0 if failed + */ +static inline int valid_mode(u32 palette) +{ + return (palette == V4L2_PIX_FMT_RGB565) || + (palette == V4L2_PIX_FMT_UYVY) || (palette == V4L2_PIX_FMT_YUV420); +} + +/*! + * Start stream I/O + * + * @param cam structure cam_data * + * + * @return status 0 Success + */ +static int csi_streamon(cam_data *cam) +{ + struct mxc_v4l_frame *frame; + + pr_debug("In MVC: %s\n", __func__); + + if (NULL == cam) { + pr_err("ERROR: v4l2 capture: %s cam parameter is NULL\n", + __func__); + return -1; + } + + /* move the frame from readyq to workingq */ + if (list_empty(&cam->ready_q)) { + pr_err("ERROR: v4l2 capture: %s: " + "ready_q queue empty\n", __func__); + return -1; + } + frame = list_entry(cam->ready_q.next, struct mxc_v4l_frame, queue); + list_del(cam->ready_q.next); + list_add_tail(&frame->queue, &cam->working_q); + __raw_writel(cam->frame[frame->index].paddress, CSI_CSIDMASA_FB1); + + if (list_empty(&cam->ready_q)) { + pr_err("ERROR: v4l2 capture: %s: " + "ready_q queue empty\n", __func__); + return -1; + } + frame = list_entry(cam->ready_q.next, struct mxc_v4l_frame, queue); + list_del(cam->ready_q.next); + list_add_tail(&frame->queue, &cam->working_q); + __raw_writel(cam->frame[frame->index].paddress, CSI_CSIDMASA_FB2); + + cam->capture_pid = current->pid; + cam->capture_on = true; + csi_cap_image(cam); + csi_enable_int(1); + + return 0; +} + +/*! + * Stop stream I/O + * + * @param cam structure cam_data * + * + * @return status 0 Success + */ +static int csi_streamoff(cam_data *cam) +{ + unsigned int cr3; + + pr_debug("In MVC: %s\n", __func__); + + if (cam->capture_on == false) + return 0; + + csi_disable_int(); + cam->capture_on = false; + + /* set CSI_CSIDMASA_FB1 and CSI_CSIDMASA_FB2 to default value */ + __raw_writel(0, CSI_CSIDMASA_FB1); + __raw_writel(0, CSI_CSIDMASA_FB2); + cr3 = __raw_readl(CSI_CSICR3); + __raw_writel(cr3 | BIT_DMA_REFLASH_RFF, CSI_CSICR3); + + csi_free_frames(cam); + csi_free_frame_buf(cam); + + return 0; +} + +/*! + * start the viewfinder job + * + * @param cam structure cam_data * + * + * @return status 0 Success + */ +static int start_preview(cam_data *cam) +{ + unsigned long fb_addr = (unsigned long)cam->v4l2_fb.base; + + __raw_writel(fb_addr, CSI_CSIDMASA_FB1); + __raw_writel(fb_addr, CSI_CSIDMASA_FB2); + __raw_writel(__raw_readl(CSI_CSICR3) | BIT_DMA_REFLASH_RFF, CSI_CSICR3); + + csi_enable_int(0); + + return 0; +} + +/*! + * shut down the viewfinder job + * + * @param cam structure cam_data * + * + * @return status 0 Success + */ +static int stop_preview(cam_data *cam) +{ + csi_disable_int(); + + /* set CSI_CSIDMASA_FB1 and CSI_CSIDMASA_FB2 to default value */ + __raw_writel(0, CSI_CSIDMASA_FB1); + __raw_writel(0, CSI_CSIDMASA_FB2); + __raw_writel(__raw_readl(CSI_CSICR3) | BIT_DMA_REFLASH_RFF, CSI_CSICR3); + + return 0; +} + +/*************************************************************************** + * VIDIOC Functions. + **************************************************************************/ + +/*! + * + * @param cam structure cam_data * + * + * @param f structure v4l2_format * + * + * @return status 0 success, EINVAL failed + */ +static int csi_v4l2_g_fmt(cam_data *cam, struct v4l2_format *f) +{ + int retval = 0; + + switch (f->type) { + case V4L2_BUF_TYPE_VIDEO_CAPTURE: + pr_debug(" type is V4L2_BUF_TYPE_VIDEO_CAPTURE\n"); + f->fmt.pix = cam->v2f.fmt.pix; + break; + case V4L2_BUF_TYPE_VIDEO_OVERLAY: + pr_debug(" type is V4L2_BUF_TYPE_VIDEO_OVERLAY\n"); + f->fmt.win = cam->win; + break; + default: + pr_debug(" type is invalid\n"); + retval = -EINVAL; + } + + pr_debug("End of %s: v2f pix widthxheight %d x %d\n", + __func__, cam->v2f.fmt.pix.width, cam->v2f.fmt.pix.height); + + return retval; +} + +/*! + * V4L2 - csi_v4l2_s_fmt function + * + * @param cam structure cam_data * + * + * @param f structure v4l2_format * + * + * @return status 0 success, EINVAL failed + */ +static int csi_v4l2_s_fmt(cam_data *cam, struct v4l2_format *f) +{ + int retval = 0; + int size = 0; + int bytesperline = 0; + int *width, *height; + + pr_debug("In MVC: %s\n", __func__); + + switch (f->type) { + case V4L2_BUF_TYPE_VIDEO_CAPTURE: + pr_debug(" type=V4L2_BUF_TYPE_VIDEO_CAPTURE\n"); + if (!valid_mode(f->fmt.pix.pixelformat)) { + pr_err("ERROR: v4l2 capture: %s: format " + "not supported\n", __func__); + return -EINVAL; + } + + /* Handle case where size requested is larger than cuurent + * camera setting. */ + if ((f->fmt.pix.width > cam->crop_bounds.width) + || (f->fmt.pix.height > cam->crop_bounds.height)) { + /* Need the logic here, calling vidioc_s_param if + * camera can change. */ + pr_debug("csi_v4l2_s_fmt size changed\n"); + } + if (cam->rotation >= IPU_ROTATE_90_RIGHT) { + height = &f->fmt.pix.width; + width = &f->fmt.pix.height; + } else { + width = &f->fmt.pix.width; + height = &f->fmt.pix.height; + } + + if ((cam->crop_bounds.width / *width > 8) || + ((cam->crop_bounds.width / *width == 8) && + (cam->crop_bounds.width % *width))) { + *width = cam->crop_bounds.width / 8; + if (*width % 8) + *width += 8 - *width % 8; + pr_err("ERROR: v4l2 capture: width exceeds limit " + "resize to %d.\n", *width); + } + + if ((cam->crop_bounds.height / *height > 8) || + ((cam->crop_bounds.height / *height == 8) && + (cam->crop_bounds.height % *height))) { + *height = cam->crop_bounds.height / 8; + if (*height % 8) + *height += 8 - *height % 8; + pr_err("ERROR: v4l2 capture: height exceeds limit " + "resize to %d.\n", *height); + } + + switch (f->fmt.pix.pixelformat) { + case V4L2_PIX_FMT_RGB565: + size = f->fmt.pix.width * f->fmt.pix.height * 2; + csi_set_16bit_imagpara(f->fmt.pix.width, + f->fmt.pix.height); + bytesperline = f->fmt.pix.width * 2; + break; + case V4L2_PIX_FMT_UYVY: + size = f->fmt.pix.width * f->fmt.pix.height * 2; + csi_set_16bit_imagpara(f->fmt.pix.width, + f->fmt.pix.height); + bytesperline = f->fmt.pix.width * 2; + break; + case V4L2_PIX_FMT_YUV420: + size = f->fmt.pix.width * f->fmt.pix.height * 3 / 2; + csi_set_12bit_imagpara(f->fmt.pix.width, + f->fmt.pix.height); + bytesperline = f->fmt.pix.width; + break; + case V4L2_PIX_FMT_YUV422P: + case V4L2_PIX_FMT_RGB24: + case V4L2_PIX_FMT_BGR24: + case V4L2_PIX_FMT_BGR32: + case V4L2_PIX_FMT_RGB32: + case V4L2_PIX_FMT_NV12: + default: + pr_debug(" case not supported\n"); + break; + } + + if (f->fmt.pix.bytesperline < bytesperline) + f->fmt.pix.bytesperline = bytesperline; + else + bytesperline = f->fmt.pix.bytesperline; + + if (f->fmt.pix.sizeimage < size) + f->fmt.pix.sizeimage = size; + else + size = f->fmt.pix.sizeimage; + + cam->v2f.fmt.pix = f->fmt.pix; + + if (cam->v2f.fmt.pix.priv != 0) { + if (copy_from_user(&cam->offset, + (void *)cam->v2f.fmt.pix.priv, + sizeof(cam->offset))) { + retval = -EFAULT; + break; + } + } + break; + case V4L2_BUF_TYPE_VIDEO_OVERLAY: + pr_debug(" type=V4L2_BUF_TYPE_VIDEO_OVERLAY\n"); + cam->win = f->fmt.win; + break; + default: + retval = -EINVAL; + } + + pr_debug("End of %s: v2f pix widthxheight %d x %d\n", + __func__, cam->v2f.fmt.pix.width, cam->v2f.fmt.pix.height); + + return retval; +} + +/*! + * V4L2 - csi_v4l2_s_param function + * Allows setting of capturemode and frame rate. + * + * @param cam structure cam_data * + * @param parm structure v4l2_streamparm * + * + * @return status 0 success, EINVAL failed + */ +static int csi_v4l2_s_param(cam_data *cam, struct v4l2_streamparm *parm) +{ + struct v4l2_ifparm ifparm; + struct v4l2_format cam_fmt; + struct v4l2_streamparm currentparm; + int err = 0; + + pr_debug("In %s\n", __func__); + + if (parm->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) { + pr_err(KERN_ERR "%s invalid type\n", __func__); + return -EINVAL; + } + + /* Stop the viewfinder */ + if (cam->overlay_on == true) + stop_preview(cam); + + currentparm.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; + + /* First check that this device can support the changes requested. */ + err = vidioc_int_g_parm(cam->sensor, ¤tparm); + if (err) { + pr_err("%s: vidioc_int_g_parm returned an error %d\n", + __func__, err); + goto exit; + } + + pr_debug(" Current capabilities are %x\n", + currentparm.parm.capture.capability); + pr_debug(" Current capturemode is %d change to %d\n", + currentparm.parm.capture.capturemode, + parm->parm.capture.capturemode); + pr_debug(" Current framerate is %d change to %d\n", + currentparm.parm.capture.timeperframe.denominator, + parm->parm.capture.timeperframe.denominator); + + err = vidioc_int_s_parm(cam->sensor, parm); + if (err) { + pr_err("%s: vidioc_int_s_parm returned an error %d\n", + __func__, err); + goto exit; + } + + vidioc_int_g_ifparm(cam->sensor, &ifparm); + cam_fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; + pr_debug(" g_fmt_cap returns widthxheight of input as %d x %d\n", + cam_fmt.fmt.pix.width, cam_fmt.fmt.pix.height); + +exit: + return err; +} + +/*! + * Dequeue one V4L capture buffer + * + * @param cam structure cam_data * + * @param buf structure v4l2_buffer * + * + * @return status 0 success, EINVAL invalid frame number + * ETIME timeout, ERESTARTSYS interrupted by user + */ +static int csi_v4l_dqueue(cam_data *cam, struct v4l2_buffer *buf) +{ + int retval = 0; + struct mxc_v4l_frame *frame; + unsigned long lock_flags; + + if (!wait_event_interruptible_timeout(cam->enc_queue, + cam->enc_counter != 0, 10 * HZ)) { + pr_err("ERROR: v4l2 capture: mxc_v4l_dqueue timeout " + "enc_counter %x\n", cam->enc_counter); + return -ETIME; + } else if (signal_pending(current)) { + pr_err("ERROR: v4l2 capture: mxc_v4l_dqueue() " + "interrupt received\n"); + return -ERESTARTSYS; + } + + spin_lock_irqsave(&cam->dqueue_int_lock, lock_flags); + + cam->enc_counter--; + + frame = list_entry(cam->done_q.next, struct mxc_v4l_frame, queue); + list_del(cam->done_q.next); + + if (frame->buffer.flags & V4L2_BUF_FLAG_DONE) { + frame->buffer.flags &= ~V4L2_BUF_FLAG_DONE; + } else if (frame->buffer.flags & V4L2_BUF_FLAG_QUEUED) { + pr_err("ERROR: v4l2 capture: VIDIOC_DQBUF: " + "Buffer not filled.\n"); + frame->buffer.flags &= ~V4L2_BUF_FLAG_QUEUED; + retval = -EINVAL; + } else if ((frame->buffer.flags & 0x7) == V4L2_BUF_FLAG_MAPPED) { + pr_err("ERROR: v4l2 capture: VIDIOC_DQBUF: " + "Buffer not queued.\n"); + retval = -EINVAL; + } + + spin_unlock_irqrestore(&cam->dqueue_int_lock, lock_flags); + + buf->bytesused = cam->v2f.fmt.pix.sizeimage; + buf->index = frame->index; + buf->flags = frame->buffer.flags; + buf->m = cam->frame[frame->index].buffer.m; + + return retval; +} + +/*! + * V4L interface - open function + * + * @param file structure file * + * + * @return status 0 success, ENODEV invalid device instance, + * ENODEV timeout, ERESTARTSYS interrupted by user + */ +static int csi_v4l_open(struct file *file) +{ + struct v4l2_ifparm ifparm; + struct v4l2_format cam_fmt; + struct video_device *dev = video_devdata(file); + cam_data *cam = video_get_drvdata(dev); + int err = 0; + + pr_debug(" device name is %s\n", dev->name); + + if (!cam) { + pr_err("ERROR: v4l2 capture: Internal error, " + "cam_data not found!\n"); + return -EBADF; + } + + down(&cam->busy_lock); + err = 0; + if (signal_pending(current)) + goto oops; + + if (cam->open_count++ == 0) { + wait_event_interruptible(cam->power_queue, + cam->low_power == false); + + cam->enc_counter = 0; + cam->skip_frame = 0; + INIT_LIST_HEAD(&cam->ready_q); + INIT_LIST_HEAD(&cam->working_q); + INIT_LIST_HEAD(&cam->done_q); + + vidioc_int_g_ifparm(cam->sensor, &ifparm); + + cam_fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; + csi_enable_mclk(CSI_MCLK_I2C, true, true); + vidioc_int_init(cam->sensor); + } + + file->private_data = dev; + +oops: + up(&cam->busy_lock); + return err; +} + +/*! + * V4L interface - close function + * + * @param file struct file * + * + * @return 0 success + */ +static int csi_v4l_close(struct file *file) +{ + struct video_device *dev = video_devdata(file); + int err = 0; + cam_data *cam = video_get_drvdata(dev); + + pr_debug("In MVC:%s\n", __func__); + + if (!cam) { + pr_err("ERROR: v4l2 capture: Internal error, " + "cam_data not found!\n"); + return -EBADF; + } + + /* for the case somebody hit the ctrl C */ + if (cam->overlay_pid == current->pid) { + err = stop_preview(cam); + cam->overlay_on = false; + } + + if (--cam->open_count == 0) { + wait_event_interruptible(cam->power_queue, + cam->low_power == false); + file->private_data = NULL; + csi_enable_mclk(CSI_MCLK_I2C, false, false); + } + + return err; +} + +/* + * V4L interface - read function + * + * @param file struct file * + * @param read buf char * + * @param count size_t + * @param ppos structure loff_t * + * + * @return bytes read + */ +static ssize_t csi_v4l_read(struct file *file, char *buf, size_t count, + loff_t *ppos) +{ + int err = 0; + struct video_device *dev = video_devdata(file); + cam_data *cam = video_get_drvdata(dev); + + if (down_interruptible(&cam->busy_lock)) + return -EINTR; + + /* Stop the viewfinder */ + if (cam->overlay_on == true) + stop_preview(cam); + + if (cam->still_buf_vaddr == NULL) { + cam->still_buf_vaddr = dma_alloc_coherent(0, + PAGE_ALIGN + (cam->v2f.fmt. + pix.sizeimage), + &cam-> + still_buf[0], + GFP_DMA | GFP_KERNEL); + if (cam->still_buf_vaddr == NULL) { + pr_err("alloc dma memory failed\n"); + return -ENOMEM; + } + cam->still_counter = 0; + __raw_writel(cam->still_buf[0], CSI_CSIDMASA_FB2); + __raw_writel(cam->still_buf[0], CSI_CSIDMASA_FB1); + __raw_writel(__raw_readl(CSI_CSICR3) | BIT_DMA_REFLASH_RFF, + CSI_CSICR3); + __raw_writel(__raw_readl(CSI_CSISR), CSI_CSISR); + __raw_writel(__raw_readl(CSI_CSICR3) | BIT_FRMCNT_RST, + CSI_CSICR3); + csi_enable_int(1); + } + + wait_event_interruptible(cam->still_queue, cam->still_counter); + csi_disable_int(); + err = copy_to_user(buf, cam->still_buf_vaddr, + cam->v2f.fmt.pix.sizeimage); + + if (cam->still_buf_vaddr != NULL) { + dma_free_coherent(0, PAGE_ALIGN(cam->v2f.fmt.pix.sizeimage), + cam->still_buf_vaddr, cam->still_buf[0]); + cam->still_buf[0] = 0; + cam->still_buf_vaddr = NULL; + } + + if (cam->overlay_on == true) + start_preview(cam); + + up(&cam->busy_lock); + if (err < 0) + return err; + + return cam->v2f.fmt.pix.sizeimage - err; +} + +/*! + * V4L interface - ioctl function + * + * @param file struct file* + * + * @param ioctlnr unsigned int + * + * @param arg void* + * + * @return 0 success, ENODEV for invalid device instance, + * -1 for other errors. + */ +static long csi_v4l_do_ioctl(struct file *file, + unsigned int ioctlnr, void *arg) +{ + struct video_device *dev = video_devdata(file); + cam_data *cam = video_get_drvdata(dev); + int retval = 0; + unsigned long lock_flags; + + pr_debug("In MVC: %s, %x\n", __func__, ioctlnr); + wait_event_interruptible(cam->power_queue, cam->low_power == false); + /* make this _really_ smp-safe */ + if (down_interruptible(&cam->busy_lock)) + return -EBUSY; + + switch (ioctlnr) { + /*! + * V4l2 VIDIOC_G_FMT ioctl + */ + case VIDIOC_G_FMT:{ + struct v4l2_format *gf = arg; + pr_debug(" case VIDIOC_G_FMT\n"); + retval = csi_v4l2_g_fmt(cam, gf); + break; + } + + /*! + * V4l2 VIDIOC_S_FMT ioctl + */ + case VIDIOC_S_FMT:{ + struct v4l2_format *sf = arg; + pr_debug(" case VIDIOC_S_FMT\n"); + retval = csi_v4l2_s_fmt(cam, sf); + vidioc_int_s_fmt_cap(cam->sensor, sf); + break; + } + + /*! + * V4l2 VIDIOC_OVERLAY ioctl + */ + case VIDIOC_OVERLAY:{ + int *on = arg; + pr_debug(" case VIDIOC_OVERLAY\n"); + if (*on) { + cam->overlay_on = true; + cam->overlay_pid = current->pid; + start_preview(cam); + } + if (!*on) { + stop_preview(cam); + cam->overlay_on = false; + } + break; + } + + /*! + * V4l2 VIDIOC_G_FBUF ioctl + */ + case VIDIOC_G_FBUF:{ + struct v4l2_framebuffer *fb = arg; + *fb = cam->v4l2_fb; + fb->capability = V4L2_FBUF_CAP_EXTERNOVERLAY; + break; + } + + /*! + * V4l2 VIDIOC_S_FBUF ioctl + */ + case VIDIOC_S_FBUF:{ + struct v4l2_framebuffer *fb = arg; + cam->v4l2_fb = *fb; + break; + } + + case VIDIOC_G_PARM:{ + struct v4l2_streamparm *parm = arg; + pr_debug(" case VIDIOC_G_PARM\n"); + vidioc_int_g_parm(cam->sensor, parm); + break; + } + + case VIDIOC_S_PARM:{ + struct v4l2_streamparm *parm = arg; + pr_debug(" case VIDIOC_S_PARM\n"); + retval = csi_v4l2_s_param(cam, parm); + break; + } + + case VIDIOC_QUERYCAP:{ + struct v4l2_capability *cap = arg; + pr_debug(" case VIDIOC_QUERYCAP\n"); + strcpy(cap->driver, "csi_v4l2"); + cap->version = KERNEL_VERSION(0, 1, 11); + cap->capabilities = V4L2_CAP_VIDEO_OVERLAY | + V4L2_CAP_VIDEO_OUTPUT_OVERLAY | V4L2_CAP_READWRITE; + cap->card[0] = '\0'; + cap->bus_info[0] = '\0'; + break; + } + + case VIDIOC_S_CROP: + pr_debug(" case not supported\n"); + break; + + case VIDIOC_REQBUFS: { + struct v4l2_requestbuffers *req = arg; + pr_debug(" case VIDIOC_REQBUFS\n"); + + if (req->count > FRAME_NUM) { + pr_err("ERROR: v4l2 capture: VIDIOC_REQBUFS: " + "not enough buffers\n"); + req->count = FRAME_NUM; + } + + if ((req->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) || + (req->memory != V4L2_MEMORY_MMAP)) { + pr_err("ERROR: v4l2 capture: VIDIOC_REQBUFS: " + "wrong buffer type\n"); + retval = -EINVAL; + break; + } + + csi_streamoff(cam); + csi_free_frame_buf(cam); + cam->skip_frame = 0; + INIT_LIST_HEAD(&cam->ready_q); + INIT_LIST_HEAD(&cam->working_q); + INIT_LIST_HEAD(&cam->done_q); + retval = csi_allocate_frame_buf(cam, req->count); + break; + } + + case VIDIOC_QUERYBUF: { + struct v4l2_buffer *buf = arg; + int index = buf->index; + pr_debug(" case VIDIOC_QUERYBUF\n"); + + if (buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) { + retval = -EINVAL; + break; + } + + memset(buf, 0, sizeof(buf)); + buf->index = index; + retval = csi_v4l2_buffer_status(cam, buf); + break; + } + + case VIDIOC_QBUF: { + struct v4l2_buffer *buf = arg; + int index = buf->index; + pr_debug(" case VIDIOC_QBUF\n"); + + spin_lock_irqsave(&cam->queue_int_lock, lock_flags); + cam->frame[index].buffer.m.offset = buf->m.offset; + if ((cam->frame[index].buffer.flags & 0x7) == + V4L2_BUF_FLAG_MAPPED) { + cam->frame[index].buffer.flags |= V4L2_BUF_FLAG_QUEUED; + if (cam->skip_frame > 0) { + list_add_tail(&cam->frame[index].queue, + &cam->working_q); + cam->skip_frame = 0; + + if (cam->ping_pong_csi == 1) { + __raw_writel(cam->frame[index].paddress, + CSI_CSIDMASA_FB1); + } else { + __raw_writel(cam->frame[index].paddress, + CSI_CSIDMASA_FB2); + } + } else { + list_add_tail(&cam->frame[index].queue, + &cam->ready_q); + } + } else if (cam->frame[index].buffer.flags & + V4L2_BUF_FLAG_QUEUED) { + pr_err("ERROR: v4l2 capture: VIDIOC_QBUF: " + "buffer already queued\n"); + retval = -EINVAL; + } else if (cam->frame[index].buffer. + flags & V4L2_BUF_FLAG_DONE) { + pr_err("ERROR: v4l2 capture: VIDIOC_QBUF: " + "overwrite done buffer.\n"); + cam->frame[index].buffer.flags &= + ~V4L2_BUF_FLAG_DONE; + cam->frame[index].buffer.flags |= + V4L2_BUF_FLAG_QUEUED; + retval = -EINVAL; + } + buf->flags = cam->frame[index].buffer.flags; + spin_unlock_irqrestore(&cam->queue_int_lock, lock_flags); + + break; + } + + case VIDIOC_DQBUF: { + struct v4l2_buffer *buf = arg; + pr_debug(" case VIDIOC_DQBUF\n"); + + retval = csi_v4l_dqueue(cam, buf); + + break; + } + + case VIDIOC_STREAMON: { + pr_debug(" case VIDIOC_STREAMON\n"); + retval = csi_streamon(cam); + break; + } + + case VIDIOC_STREAMOFF: { + pr_debug(" case VIDIOC_STREAMOFF\n"); + retval = csi_streamoff(cam); + break; + } + + case VIDIOC_S_CTRL: + case VIDIOC_G_STD: + case VIDIOC_G_OUTPUT: + case VIDIOC_S_OUTPUT: + case VIDIOC_ENUMSTD: + case VIDIOC_G_CROP: + case VIDIOC_CROPCAP: + case VIDIOC_S_STD: + case VIDIOC_G_CTRL: + case VIDIOC_ENUM_FMT: + case VIDIOC_TRY_FMT: + case VIDIOC_QUERYCTRL: + case VIDIOC_ENUMINPUT: + case VIDIOC_G_INPUT: + case VIDIOC_S_INPUT: + case VIDIOC_G_TUNER: + case VIDIOC_S_TUNER: + case VIDIOC_G_FREQUENCY: + case VIDIOC_S_FREQUENCY: + case VIDIOC_ENUMOUTPUT: + default: + pr_debug(" case not supported\n"); + retval = -EINVAL; + break; + } + + up(&cam->busy_lock); + return retval; +} + +/* + * V4L interface - ioctl function + * + * @return None + */ +static long csi_v4l_ioctl(struct file *file, + unsigned int cmd, unsigned long arg) +{ + return video_usercopy(file, cmd, arg, csi_v4l_do_ioctl); +} + +/*! + * V4L interface - mmap function + * + * @param file structure file * + * + * @param vma structure vm_area_struct * + * + * @return status 0 Success, EINTR busy lock error, ENOBUFS remap_page error + */ +static int csi_mmap(struct file *file, struct vm_area_struct *vma) +{ + struct video_device *dev = video_devdata(file); + unsigned long size; + int res = 0; + cam_data *cam = video_get_drvdata(dev); + + pr_debug("%s\n", __func__); + pr_debug("\npgoff=0x%lx, start=0x%lx, end=0x%lx\n", + vma->vm_pgoff, vma->vm_start, vma->vm_end); + + /* make this _really_ smp-safe */ + if (down_interruptible(&cam->busy_lock)) + return -EINTR; + + size = vma->vm_end - vma->vm_start; + vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); + + if (remap_pfn_range(vma, vma->vm_start, + vma->vm_pgoff, size, vma->vm_page_prot)) { + pr_err("ERROR: v4l2 capture: %s : " + "remap_pfn_range failed\n", __func__); + res = -ENOBUFS; + goto csi_mmap_exit; + } + + vma->vm_flags &= ~VM_IO; /* using shared anonymous pages */ + +csi_mmap_exit: + up(&cam->busy_lock); + return res; +} + +/*! + * This structure defines the functions to be called in this driver. + */ +static struct v4l2_file_operations csi_v4l_fops = { + .owner = THIS_MODULE, + .open = csi_v4l_open, + .release = csi_v4l_close, + .read = csi_v4l_read, + .ioctl = csi_v4l_ioctl, + .mmap = csi_mmap, +}; + +static struct video_device csi_v4l_template = { + .name = "Mx25 Camera", + .fops = &csi_v4l_fops, + .release = video_device_release, +}; + +/*! + * This function can be used to release any platform data on closing. + */ +static void camera_platform_release(struct device *device) +{ +} + +/*! Device Definition for csi v4l2 device */ +static struct platform_device csi_v4l2_devices = { + .name = "csi_v4l2", + .dev = { + .release = camera_platform_release, + }, + .id = 0, +}; + +/*! + * initialize cam_data structure + * + * @param cam structure cam_data * + * + * @return status 0 Success + */ +static void init_camera_struct(cam_data *cam) +{ + pr_debug("In MVC: %s\n", __func__); + + /* Default everything to 0 */ + memset(cam, 0, sizeof(cam_data)); + + init_MUTEX(&cam->param_lock); + init_MUTEX(&cam->busy_lock); + + cam->video_dev = video_device_alloc(); + if (cam->video_dev == NULL) + return; + + *(cam->video_dev) = csi_v4l_template; + + video_set_drvdata(cam->video_dev, cam); + dev_set_drvdata(&csi_v4l2_devices.dev, (void *)cam); + cam->video_dev->minor = -1; + + init_waitqueue_head(&cam->enc_queue); + init_waitqueue_head(&cam->still_queue); + + cam->streamparm.parm.capture.capturemode = 0; + + cam->standard.index = 0; + cam->standard.id = V4L2_STD_UNKNOWN; + cam->standard.frameperiod.denominator = 30; + cam->standard.frameperiod.numerator = 1; + cam->standard.framelines = 480; + cam->standard_autodetect = true; + cam->streamparm.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; + cam->streamparm.parm.capture.timeperframe = cam->standard.frameperiod; + cam->streamparm.parm.capture.capability = V4L2_CAP_TIMEPERFRAME; + cam->overlay_on = false; + cam->capture_on = false; + cam->skip_frame = 0; + cam->v4l2_fb.flags = V4L2_FBUF_FLAG_OVERLAY; + + cam->v2f.fmt.pix.sizeimage = 480 * 640 * 2; + cam->v2f.fmt.pix.bytesperline = 640 * 2; + cam->v2f.fmt.pix.width = 640; + cam->v2f.fmt.pix.height = 480; + cam->v2f.fmt.pix.pixelformat = V4L2_PIX_FMT_UYVY; + cam->win.w.width = 160; + cam->win.w.height = 160; + cam->win.w.left = 0; + cam->win.w.top = 0; + cam->still_counter = 0; + + cam->enc_callback = camera_callback; + csi_start_callback(cam); + init_waitqueue_head(&cam->power_queue); + spin_lock_init(&cam->queue_int_lock); + spin_lock_init(&cam->dqueue_int_lock); +} + +/*! + * camera_power function + * Turns Sensor power On/Off + * + * @param cam cam data struct + * @param cameraOn true to turn camera on, false to turn off power. + * + * @return status + */ +static u8 camera_power(cam_data *cam, bool cameraOn) +{ + pr_debug("In MVC: %s on=%d\n", __func__, cameraOn); + + if (cameraOn == true) { + csi_enable_mclk(CSI_MCLK_I2C, true, true); + vidioc_int_s_power(cam->sensor, 1); + } else { + csi_enable_mclk(CSI_MCLK_I2C, false, false); + vidioc_int_s_power(cam->sensor, 0); + } + return 0; +} + +/*! + * This function is called to put the sensor in a low power state. + * Refer to the document driver-model/driver.txt in the kernel source tree + * for more information. + * + * @param pdev the device structure used to give information on which I2C + * to suspend + * @param state the power state the device is entering + * + * @return The function returns 0 on success and -1 on failure. + */ +static int csi_v4l2_suspend(struct platform_device *pdev, pm_message_t state) +{ + cam_data *cam = platform_get_drvdata(pdev); + + pr_debug("In MVC: %s\n", __func__); + + if (cam == NULL) + return -1; + + cam->low_power = true; + + if (cam->overlay_on == true) + stop_preview(cam); + + camera_power(cam, false); + + return 0; +} + +/*! + * This function is called to bring the sensor back from a low power state. + * Refer to the document driver-model/driver.txt in the kernel source tree + * for more information. + * + * @param pdev the device structure + * + * @return The function returns 0 on success and -1 on failure + */ +static int csi_v4l2_resume(struct platform_device *pdev) +{ + cam_data *cam = platform_get_drvdata(pdev); + + pr_debug("In MVC: %s\n", __func__); + + if (cam == NULL) + return -1; + + cam->low_power = false; + wake_up_interruptible(&cam->power_queue); + camera_power(cam, true); + + if (cam->overlay_on == true) + start_preview(cam); + + return 0; +} + +/*! + * This structure contains pointers to the power management callback functions. + */ +static struct platform_driver csi_v4l2_driver = { + .driver = { + .name = "csi_v4l2", + }, + .probe = NULL, + .remove = NULL, +#ifdef CONFIG_PM + .suspend = csi_v4l2_suspend, + .resume = csi_v4l2_resume, +#endif + .shutdown = NULL, +}; + +/*! + * Initializes the camera driver. + */ +static int csi_v4l2_master_attach(struct v4l2_int_device *slave) +{ + cam_data *cam = slave->u.slave->master->priv; + struct v4l2_format cam_fmt; + + pr_debug("In MVC: %s\n", __func__); + pr_debug(" slave.name = %s\n", slave->name); + pr_debug(" master.name = %s\n", slave->u.slave->master->name); + + cam->sensor = slave; + if (slave == NULL) { + pr_err("ERROR: v4l2 capture: slave parameter not valid.\n"); + return -1; + } + + csi_enable_mclk(CSI_MCLK_I2C, true, true); + vidioc_int_dev_init(slave); + csi_enable_mclk(CSI_MCLK_I2C, false, false); + cam_fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; + + /* Used to detect TV in (type 1) vs. camera (type 0) */ + cam->device_type = cam_fmt.fmt.pix.priv; + + pr_debug("End of %s: v2f pix widthxheight %d x %d\n", + __func__, cam->v2f.fmt.pix.width, cam->v2f.fmt.pix.height); + + return 0; +} + +/*! + * Disconnects the camera driver. + */ +static void csi_v4l2_master_detach(struct v4l2_int_device *slave) +{ + pr_debug("In MVC: %s\n", __func__); + + vidioc_int_dev_exit(slave); +} + +/*! + * Entry point for the V4L2 + * + * @return Error code indicating success or failure + */ +static __init int camera_init(void) +{ + u8 err = 0; + + /* Register the device driver structure. */ + err = platform_driver_register(&csi_v4l2_driver); + if (err != 0) { + pr_err("ERROR: v4l2 capture:camera_init: " + "platform_driver_register failed.\n"); + return err; + } + + /* Create g_cam and initialize it. */ + g_cam = kmalloc(sizeof(cam_data), GFP_KERNEL); + if (g_cam == NULL) { + pr_err("ERROR: v4l2 capture: failed to register camera\n"); + platform_driver_unregister(&csi_v4l2_driver); + return -1; + } + init_camera_struct(g_cam); + + /* Set up the v4l2 device and register it */ + csi_v4l2_int_device.priv = g_cam; + /* This function contains a bug that won't let this be rmmod'd. */ + v4l2_int_device_register(&csi_v4l2_int_device); + + /* Register the platform device */ + err = platform_device_register(&csi_v4l2_devices); + if (err != 0) { + pr_err("ERROR: v4l2 capture: camera_init: " + "platform_device_register failed.\n"); + platform_driver_unregister(&csi_v4l2_driver); + kfree(g_cam); + g_cam = NULL; + return err; + } + + /* register v4l video device */ + if (video_register_device(g_cam->video_dev, VFL_TYPE_GRABBER, video_nr) + == -1) { + platform_device_unregister(&csi_v4l2_devices); + platform_driver_unregister(&csi_v4l2_driver); + kfree(g_cam); + g_cam = NULL; + pr_err("ERROR: v4l2 capture: video_register_device failed\n"); + return -1; + } + pr_debug(" Video device registered: %s #%d\n", + g_cam->video_dev->name, g_cam->video_dev->minor); + + return err; +} + +/*! + * Exit and cleanup for the V4L2 + */ +static void __exit camera_exit(void) +{ + pr_debug("In MVC: %s\n", __func__); + + if (g_cam->open_count) { + pr_err("ERROR: v4l2 capture:camera open " + "-- setting ops to NULL\n"); + } else { + pr_info("V4L2 freeing image input device\n"); + v4l2_int_device_unregister(&csi_v4l2_int_device); + csi_stop_callback(g_cam); + video_unregister_device(g_cam->video_dev); + platform_driver_unregister(&csi_v4l2_driver); + platform_device_unregister(&csi_v4l2_devices); + + kfree(g_cam); + g_cam = NULL; + } +} + +module_init(camera_init); +module_exit(camera_exit); + +module_param(video_nr, int, 0444); +MODULE_AUTHOR("Freescale Semiconductor, Inc."); +MODULE_DESCRIPTION("V4L2 capture driver for Mx25 based cameras"); +MODULE_LICENSE("GPL"); +MODULE_SUPPORTED_DEVICE("video"); |