/* * Copyright (C) 2009 Texas Instruments Inc * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * * TODO : add support for VBI & HBI data service * add static buffer allocation */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "vpif_capture.h" #include "vpif.h" MODULE_DESCRIPTION("TI DaVinci VPIF Capture driver"); MODULE_LICENSE("GPL"); #define vpif_err(fmt, arg...) v4l2_err(&vpif_obj.v4l2_dev, fmt, ## arg) #define vpif_dbg(level, debug, fmt, arg...) \ v4l2_dbg(level, debug, &vpif_obj.v4l2_dev, fmt, ## arg) static int debug = 1; static u32 ch0_numbuffers = 3; static u32 ch1_numbuffers = 3; static u32 ch0_bufsize = 1920 * 1080 * 2; static u32 ch1_bufsize = 720 * 576 * 2; module_param(debug, int, 0644); module_param(ch0_numbuffers, uint, S_IRUGO); module_param(ch1_numbuffers, uint, S_IRUGO); module_param(ch0_bufsize, uint, S_IRUGO); module_param(ch1_bufsize, uint, S_IRUGO); MODULE_PARM_DESC(debug, "Debug level 0-1"); MODULE_PARM_DESC(ch2_numbuffers, "Channel0 buffer count (default:3)"); MODULE_PARM_DESC(ch3_numbuffers, "Channel1 buffer count (default:3)"); MODULE_PARM_DESC(ch2_bufsize, "Channel0 buffer size (default:1920 x 1080 x 2)"); MODULE_PARM_DESC(ch3_bufsize, "Channel1 buffer size (default:720 x 576 x 2)"); static struct vpif_config_params config_params = { .min_numbuffers = 3, .numbuffers[0] = 3, .numbuffers[1] = 3, .min_bufsize[0] = 720 * 480 * 2, .min_bufsize[1] = 720 * 480 * 2, .channel_bufsize[0] = 1920 * 1080 * 2, .channel_bufsize[1] = 720 * 576 * 2, }; /* global variables */ static struct vpif_device vpif_obj = { {NULL} }; static struct device *vpif_dev; /** * ch_params: video standard configuration parameters for vpif */ static const struct vpif_channel_config_params ch_params[] = { { "NTSC_M", 720, 480, 30, 0, 1, 268, 1440, 1, 23, 263, 266, 286, 525, 525, 0, 1, 0, V4L2_STD_525_60, }, { "PAL_BDGHIK", 720, 576, 25, 0, 1, 280, 1440, 1, 23, 311, 313, 336, 624, 625, 0, 1, 0, V4L2_STD_625_50, }, }; /** * vpif_uservirt_to_phys : translate user/virtual address to phy address * @virtp: user/virtual address * * This inline function is used to convert user space virtual address to * physical address. */ static inline u32 vpif_uservirt_to_phys(u32 virtp) { unsigned long physp = 0; struct mm_struct *mm = current->mm; struct vm_area_struct *vma; vma = find_vma(mm, virtp); /* For kernel direct-mapped memory, take the easy way */ if (virtp >= PAGE_OFFSET) physp = virt_to_phys((void *)virtp); else if (vma && (vma->vm_flags & VM_IO) && (vma->vm_pgoff)) /** * this will catch, kernel-allocated, mmaped-to-usermode * addresses */ physp = (vma->vm_pgoff << PAGE_SHIFT) + (virtp - vma->vm_start); else { /* otherwise, use get_user_pages() for general userland pages */ int res, nr_pages = 1; struct page *pages; down_read(¤t->mm->mmap_sem); res = get_user_pages(current, current->mm, virtp, nr_pages, 1, 0, &pages, NULL); up_read(¤t->mm->mmap_sem); if (res == nr_pages) physp = __pa(page_address(&pages[0]) + (virtp & ~PAGE_MASK)); else { vpif_err("get_user_pages failed\n"); return 0; } } return physp; } /** * buffer_prepare : callback function for buffer prepare * @q : buffer queue ptr * @vb: ptr to video buffer * @field: field info * * This is the callback function for buffer prepare when videobuf_qbuf() * function is called. The buffer is prepared and user space virtual address * or user address is converted into physical address */ static int vpif_buffer_prepare(struct videobuf_queue *q, struct videobuf_buffer *vb, enum v4l2_field field) { /* Get the file handle object and channel object */ struct vpif_fh *fh = q->priv_data; struct channel_obj *ch = fh->channel; struct common_obj *common; unsigned long addr; vpif_dbg(2, debug, "vpif_buffer_prepare\n"); common = &ch->common[VPIF_VIDEO_INDEX]; /* If buffer is not initialized, initialize it */ if (VIDEOBUF_NEEDS_INIT == vb->state) { vb->width = common->width; vb->height = common->height; vb->size = vb->width * vb->height; vb->field = field; } vb->state = VIDEOBUF_PREPARED; /** * if user pointer memory mechanism is used, get the physical * address of the buffer */ if (V4L2_MEMORY_USERPTR == common->memory) { if (0 == vb->baddr) { vpif_dbg(1, debug, "buffer address is 0\n"); return -EINVAL; } vb->boff = vpif_uservirt_to_phys(vb->baddr); if (!IS_ALIGNED(vb->boff, 8)) goto exit; } addr = vb->boff; if (q->streaming) { if (!IS_ALIGNED((addr + common->ytop_off), 8) || !IS_ALIGNED((addr + common->ybtm_off), 8) || !IS_ALIGNED((addr + common->ctop_off), 8) || !IS_ALIGNED((addr + common->cbtm_off), 8)) goto exit; } return 0; exit: vpif_dbg(1, debug, "buffer_prepare:offset is not aligned to 8 bytes\n"); return -EINVAL; } /** * vpif_buffer_setup : Callback function for buffer setup. * @q: buffer queue ptr * @count: number of buffers * @size: size of the buffer * * This callback function is called when reqbuf() is called to adjust * the buffer count and buffer size */ static int vpif_buffer_setup(struct videobuf_queue *q, unsigned int *count, unsigned int *size) { /* Get the file handle object and channel object */ struct vpif_fh *fh = q->priv_data; struct channel_obj *ch = fh->channel; struct common_obj *common; common = &ch->common[VPIF_VIDEO_INDEX]; vpif_dbg(2, debug, "vpif_buffer_setup\n"); /* If memory type is not mmap, return */ if (V4L2_MEMORY_MMAP != common->memory) return 0; /* Calculate the size of the buffer */ *size = config_params.channel_bufsize[ch->channel_id]; if (*count < config_params.min_numbuffers) *count = config_params.min_numbuffers; return 0; } /** * vpif_buffer_queue : Callback function to add buffer to DMA queue * @q: ptr to videobuf_queue * @vb: ptr to videobuf_buffer */ static void vpif_buffer_queue(struct videobuf_queue *q, struct videobuf_buffer *vb) { /* Get the file handle object and channel object */ struct vpif_fh *fh = q->priv_data; struct channel_obj *ch = fh->channel; struct common_obj *common; common = &ch->common[VPIF_VIDEO_INDEX]; vpif_dbg(2, debug, "vpif_buffer_queue\n"); /* add the buffer to the DMA queue */ list_add_tail(&vb->queue, &common->dma_queue); /* Change state of the buffer */ vb->state = VIDEOBUF_QUEUED; } /** * vpif_buffer_release : Callback function to free buffer * @q: buffer queue ptr * @vb: ptr to video buffer * * This function is called from the videobuf layer to free memory * allocated to the buffers */ static void vpif_buffer_release(struct videobuf_queue *q, struct videobuf_buffer *vb) { /* Get the file handle object and channel object */ struct vpif_fh *fh = q->priv_data; struct channel_obj *ch = fh->channel; struct common_obj *common; common = &ch->common[VPIF_VIDEO_INDEX]; videobuf_dma_contig_free(q, vb); vb->state = VIDEOBUF_NEEDS_INIT; } static struct videobuf_queue_ops video_qops = { .buf_setup = vpif_buffer_setup, .buf_prepare = vpif_buffer_prepare, .buf_queue = vpif_buffer_queue, .buf_release = vpif_buffer_release, }; static u8 channel_first_int[VPIF_NUMBER_OF_OBJECTS][2] = { {1, 1} }; /** * vpif_process_buffer_complete: process a completed buffer * @common: ptr to common channel object * * This function time stamp the buffer and mark it as DONE. It also * wake up any process waiting on the QUEUE and set the next buffer * as current */ static void vpif_process_buffer_complete(struct common_obj *common) { do_gettimeofday(&common->cur_frm->ts); common->cur_frm->state = VIDEOBUF_DONE; wake_up_interruptible(&common->cur_frm->done); /* Make curFrm pointing to nextFrm */ common->cur_frm = common->next_frm; } /** * vpif_schedule_next_buffer: set next buffer address for capture * @common : ptr to common channel object * * This function will get next buffer from the dma queue and * set the buffer address in the vpif register for capture. * the buffer is marked active */ static void vpif_schedule_next_buffer(struct common_obj *common) { unsigned long addr = 0; common->next_frm = list_entry(common->dma_queue.next, struct videobuf_buffer, queue); /* Remove that buffer from the buffer queue */ list_del(&common->next_frm->queue); common->next_frm->state = VIDEOBUF_ACTIVE; if (V4L2_MEMORY_USERPTR == common->memory) addr = common->next_frm->boff; else addr = videobuf_to_dma_contig(common->next_frm); /* Set top and bottom field addresses in VPIF registers */ common->set_addr(addr + common->ytop_off, addr + common->ybtm_off, addr + common->ctop_off, addr + common->cbtm_off); } /** * vpif_channel_isr : ISR handler for vpif capture * @irq: irq number * @dev_id: dev_id ptr * * It changes status of the captured buffer, takes next buffer from the queue * and sets its address in VPIF registers */ static irqreturn_t vpif_channel_isr(int irq, void *dev_id) { struct vpif_device *dev = &vpif_obj; struct common_obj *common; struct channel_obj *ch; enum v4l2_field field; int channel_id = 0; int fid = -1, i; channel_id = *(int *)(dev_id); ch = dev->dev[channel_id]; field = ch->common[VPIF_VIDEO_INDEX].fmt.fmt.pix.field; for (i = 0; i < VPIF_NUMBER_OF_OBJECTS; i++) { common = &ch->common[i]; /* skip If streaming is not started in this channel */ if (0 == common->started) continue; /* Check the field format */ if (1 == ch->vpifparams.std_info.frm_fmt) { /* Progressive mode */ if (list_empty(&common->dma_queue)) continue; if (!channel_first_int[i][channel_id]) vpif_process_buffer_complete(common); channel_first_int[i][channel_id] = 0; vpif_schedule_next_buffer(common); channel_first_int[i][channel_id] = 0; } else { /** * Interlaced mode. If it is first interrupt, ignore * it */ if (channel_first_int[i][channel_id]) { channel_first_int[i][channel_id] = 0; continue; } if (0 == i) { ch->field_id ^= 1; /* Get field id from VPIF registers */ fid = vpif_channel_getfid(ch->channel_id); if (fid != ch->field_id) { /** * If field id does not match stored * field id, make them in sync */ if (0 == fid) ch->field_id = fid; return IRQ_HANDLED; } } /* device field id and local field id are in sync */ if (0 == fid) { /* this is even field */ if (common->cur_frm == common->next_frm) continue; /* mark the current buffer as done */ vpif_process_buffer_complete(common); } else if (1 == fid) { /* odd field */ if (list_empty(&common->dma_queue) || (common->cur_frm != common->next_frm)) continue; vpif_schedule_next_buffer(common); } } } return IRQ_HANDLED; } /** * vpif_update_std_info() - update standard related info * @ch: ptr to channel object * * For a given standard selected by application, update values * in the device data structures */ static int vpif_update_std_info(struct channel_obj *ch) { struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX]; struct vpif_params *vpifparams = &ch->vpifparams; const struct vpif_channel_config_params *config; struct vpif_channel_config_params *std_info; struct video_obj *vid_ch = &ch->video; int index; vpif_dbg(2, debug, "vpif_update_std_info\n"); std_info = &vpifparams->std_info; for (index = 0; index < ARRAY_SIZE(ch_params); index++) { config = &ch_params[index]; if (config->stdid & vid_ch->stdid) { memcpy(std_info, config, sizeof(*config)); break; } } /* standard not found */ if (index == ARRAY_SIZE(ch_params)) return -EINVAL; common->fmt.fmt.pix.width = std_info->width; common->width = std_info->width; common->fmt.fmt.pix.height = std_info->height; common->height = std_info->height; common->fmt.fmt.pix.bytesperline = std_info->width; vpifparams->video_params.hpitch = std_info->width; vpifparams->video_params.storage_mode = std_info->frm_fmt; return 0; } /** * vpif_calculate_offsets : This function calculates buffers offsets * @ch : ptr to channel object * * This function calculates buffer offsets for Y and C in the top and * bottom field */ static void vpif_calculate_offsets(struct channel_obj *ch) { unsigned int hpitch, vpitch, sizeimage; struct video_obj *vid_ch = &(ch->video); struct vpif_params *vpifparams = &ch->vpifparams; struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX]; enum v4l2_field field = common->fmt.fmt.pix.field; vpif_dbg(2, debug, "vpif_calculate_offsets\n"); if (V4L2_FIELD_ANY == field) { if (vpifparams->std_info.frm_fmt) vid_ch->buf_field = V4L2_FIELD_NONE; else vid_ch->buf_field = V4L2_FIELD_INTERLACED; } else vid_ch->buf_field = common->fmt.fmt.pix.field; if (V4L2_MEMORY_USERPTR == common->memory) sizeimage = common->fmt.fmt.pix.sizeimage; else sizeimage = config_params.channel_bufsize[ch->channel_id]; hpitch = common->fmt.fmt.pix.bytesperline; vpitch = sizeimage / (hpitch * 2); if ((V4L2_FIELD_NONE == vid_ch->buf_field) || (V4L2_FIELD_INTERLACED == vid_ch->buf_field)) { /* Calculate offsets for Y top, Y Bottom, C top and C Bottom */ common->ytop_off = 0; common->ybtm_off = hpitch; common->ctop_off = sizeimage / 2; common->cbtm_off = sizeimage / 2 + hpitch; } else if (V4L2_FIELD_SEQ_TB == vid_ch->buf_field) { /* Calculate offsets for Y top, Y Bottom, C top and C Bottom */ common->ytop_off = 0; common->ybtm_off = sizeimage / 4; common->ctop_off = sizeimage / 2; common->cbtm_off = common->ctop_off + sizeimage / 4; } else if (V4L2_FIELD_SEQ_BT == vid_ch->buf_field) { /* Calculate offsets for Y top, Y Bottom, C top and C Bottom */ common->ybtm_off = 0; common->ytop_off = sizeimage / 4; common->cbtm_off = sizeimage / 2; common->ctop_off = common->cbtm_off + sizeimage / 4; } if ((V4L2_FIELD_NONE == vid_ch->buf_field) || (V4L2_FIELD_INTERLACED == vid_ch->buf_field)) vpifparams->video_params.storage_mode = 1; else vpifparams->video_params.storage_mode = 0; if (1 == vpifparams->std_info.frm_fmt) vpifparams->video_params.hpitch = common->fmt.fmt.pix.bytesperline; else { if ((field == V4L2_FIELD_ANY) || (field == V4L2_FIELD_INTERLACED)) vpifparams->video_params.hpitch = common->fmt.fmt.pix.bytesperline * 2; else vpifparams->video_params.hpitch = common->fmt.fmt.pix.bytesperline; } ch->vpifparams.video_params.stdid = vpifparams->std_info.stdid; } /** * vpif_config_format: configure default frame format in the device * ch : ptr to channel object */ static void vpif_config_format(struct channel_obj *ch) { struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX]; vpif_dbg(2, debug, "vpif_config_format\n"); common->fmt.fmt.pix.field = V4L2_FIELD_ANY; if (config_params.numbuffers[ch->channel_id] == 0) common->memory = V4L2_MEMORY_USERPTR; else common->memory = V4L2_MEMORY_MMAP; common->fmt.fmt.pix.sizeimage = config_params.channel_bufsize[ch->channel_id]; if (ch->vpifparams.iface.if_type == VPIF_IF_RAW_BAYER) common->fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_SBGGR8; else common->fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_YUV422P; common->fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; } /** * vpif_get_default_field() - Get default field type based on interface * @vpif_params - ptr to vpif params */ static inline enum v4l2_field vpif_get_default_field( struct vpif_interface *iface) { return (iface->if_type == VPIF_IF_RAW_BAYER) ? V4L2_FIELD_NONE : V4L2_FIELD_INTERLACED; } /** * vpif_check_format() - check given pixel format for compatibility * @ch - channel ptr * @pixfmt - Given pixel format * @update - update the values as per hardware requirement * * Check the application pixel format for S_FMT and update the input * values as per hardware limits for TRY_FMT. The default pixel and * field format is selected based on interface type. */ static int vpif_check_format(struct channel_obj *ch, struct v4l2_pix_format *pixfmt, int update) { struct common_obj *common = &(ch->common[VPIF_VIDEO_INDEX]); struct vpif_params *vpif_params = &ch->vpifparams; enum v4l2_field field = pixfmt->field; u32 sizeimage, hpitch, vpitch; int ret = -EINVAL; vpif_dbg(2, debug, "vpif_check_format\n"); /** * first check for the pixel format. If if_type is Raw bayer, * only V4L2_PIX_FMT_SBGGR8 format is supported. Otherwise only * V4L2_PIX_FMT_YUV422P is supported */ if (vpif_params->iface.if_type == VPIF_IF_RAW_BAYER) { if (pixfmt->pixelformat != V4L2_PIX_FMT_SBGGR8) { if (!update) { vpif_dbg(2, debug, "invalid pix format\n"); goto exit; } pixfmt->pixelformat = V4L2_PIX_FMT_SBGGR8; } } else { if (pixfmt->pixelformat != V4L2_PIX_FMT_YUV422P) { if (!update) { vpif_dbg(2, debug, "invalid pixel format\n"); goto exit; } pixfmt->pixelformat = V4L2_PIX_FMT_YUV422P; } } if (!(VPIF_VALID_FIELD(field))) { if (!update) { vpif_dbg(2, debug, "invalid field format\n"); goto exit; } /** * By default use FIELD_NONE for RAW Bayer capture * and FIELD_INTERLACED for other interfaces */ field = vpif_get_default_field(&vpif_params->iface); } else if (field == V4L2_FIELD_ANY) /* unsupported field. Use default */ field = vpif_get_default_field(&vpif_params->iface); /* validate the hpitch */ hpitch = pixfmt->bytesperline; if (hpitch < vpif_params->std_info.width) { if (!update) { vpif_dbg(2, debug, "invalid hpitch\n"); goto exit; } hpitch = vpif_params->std_info.width; } if (V4L2_MEMORY_USERPTR == common->memory) sizeimage = pixfmt->sizeimage; else sizeimage = config_params.channel_bufsize[ch->channel_id]; vpitch = sizeimage / (hpitch * 2); /* validate the vpitch */ if (vpitch < vpif_params->std_info.height) { if (!update) { vpif_dbg(2, debug, "Invalid vpitch\n"); goto exit; } vpitch = vpif_params->std_info.height; } /* Check for 8 byte alignment */ if (!ALIGN(hpitch, 8)) { if (!update) { vpif_dbg(2, debug, "invalid pitch alignment\n"); goto exit; } /* adjust to next 8 byte boundary */ hpitch = (((hpitch + 7) / 8) * 8); } /* if update is set, modify the bytesperline and sizeimage */ if (update) { pixfmt->bytesperline = hpitch; pixfmt->sizeimage = hpitch * vpitch * 2; } /** * Image width and height is always based on current standard width and * height */ pixfmt->width = common->fmt.fmt.pix.width; pixfmt->height = common->fmt.fmt.pix.height; return 0; exit: return ret; } /** * vpif_config_addr() - function to configure buffer address in vpif * @ch - channel ptr * @muxmode - channel mux mode */ static void vpif_config_addr(struct channel_obj *ch, int muxmode) { struct common_obj *common; vpif_dbg(2, debug, "vpif_config_addr\n"); common = &(ch->common[VPIF_VIDEO_INDEX]); if (VPIF_CHANNEL1_VIDEO == ch->channel_id) common->set_addr = ch1_set_videobuf_addr; else if (2 == muxmode) common->set_addr = ch0_set_videobuf_addr_yc_nmux; else common->set_addr = ch0_set_videobuf_addr; } /** * vpfe_mmap : It is used to map kernel space buffers into user spaces * @filep: file pointer * @vma: ptr to vm_area_struct */ static int vpif_mmap(struct file *filep, struct vm_area_struct *vma) { /* Get the channel object and file handle object */ struct vpif_fh *fh = filep->private_data; struct channel_obj *ch = fh->channel; struct common_obj *common = &(ch->common[VPIF_VIDEO_INDEX]); vpif_dbg(2, debug, "vpif_mmap\n"); return videobuf_mmap_mapper(&common->buffer_queue, vma); } /** * vpif_poll: It is used for select/poll system call * @filep: file pointer * @wait: poll table to wait */ static unsigned int vpif_poll(struct file *filep, poll_table * wait) { int err = 0; struct vpif_fh *fh = filep->private_data; struct channel_obj *channel = fh->channel; struct common_obj *common = &(channel->common[VPIF_VIDEO_INDEX]); vpif_dbg(2, debug, "vpif_poll\n"); if (common->started) err = videobuf_poll_stream(filep, &common->buffer_queue, wait); return 0; } /** * vpif_open : vpif open handler * @filep: file ptr * * It creates object of file handle structure and stores it in private_data * member of filepointer */ static int vpif_open(struct file *filep) { struct vpif_capture_config *config = vpif_dev->platform_data; struct video_device *vdev = video_devdata(filep); struct common_obj *common; struct video_obj *vid_ch; struct channel_obj *ch; struct vpif_fh *fh; int i, ret = 0; vpif_dbg(2, debug, "vpif_open\n"); ch = video_get_drvdata(vdev); vid_ch = &ch->video; common = &ch->common[VPIF_VIDEO_INDEX]; if (mutex_lock_interruptible(&common->lock)) return -ERESTARTSYS; if (NULL == ch->curr_subdev_info) { /** * search through the sub device to see a registered * sub device and make it as current sub device */ for (i = 0; i < config->subdev_count; i++) { if (vpif_obj.sd[i]) { /* the sub device is registered */ ch->curr_subdev_info = &config->subdev_info[i]; /* make first input as the current input */ vid_ch->input_idx = 0; break; } } if (i == config->subdev_count) { vpif_err("No sub device registered\n"); ret = -ENOENT; goto exit; } } /* Allocate memory for the file handle object */ fh = kmalloc(sizeof(struct vpif_fh), GFP_KERNEL); if (NULL == fh) { vpif_err("unable to allocate memory for file handle object\n"); ret = -ENOMEM; goto exit; } /* store pointer to fh in private_data member of filep */ filep->private_data = fh; fh->channel = ch; fh->initialized = 0; /* If decoder is not initialized. initialize it */ if (!ch->initialized) { fh->initialized = 1; ch->initialized = 1; memset(&(ch->vpifparams), 0, sizeof(struct vpif_params)); } /* Increment channel usrs counter */ ch->usrs++; /* Set io_allowed member to false */ fh->io_allowed[VPIF_VIDEO_INDEX] = 0; /* Initialize priority of this instance to default priority */ fh->prio = V4L2_PRIORITY_UNSET; v4l2_prio_open(&ch->prio, &fh->prio); exit: mutex_unlock(&common->lock); return ret; } /** * vpif_release : function to clean up file close * @filep: file pointer * * This function deletes buffer queue, frees the buffers and the vpfe file * handle */ static int vpif_release(struct file *filep) { struct vpif_fh *fh = filep->private_data; struct channel_obj *ch = fh->channel; struct common_obj *common; vpif_dbg(2, debug, "vpif_release\n"); common = &ch->common[VPIF_VIDEO_INDEX]; if (mutex_lock_interruptible(&common->lock)) return -ERESTARTSYS; /* if this instance is doing IO */ if (fh->io_allowed[VPIF_VIDEO_INDEX]) { /* Reset io_usrs member of channel object */ common->io_usrs = 0; /* Disable channel as per its device type and channel id */ if (VPIF_CHANNEL0_VIDEO == ch->channel_id) { enable_channel0(0); channel0_intr_enable(0); } if ((VPIF_CHANNEL1_VIDEO == ch->channel_id) || (2 == common->started)) { enable_channel1(0); channel1_intr_enable(0); } common->started = 0; /* Free buffers allocated */ videobuf_queue_cancel(&common->buffer_queue); videobuf_mmap_free(&common->buffer_queue); } /* Decrement channel usrs counter */ ch->usrs--; /* unlock mutex on channel object */ mutex_unlock(&common->lock); /* Close the priority */ v4l2_prio_close(&ch->prio, fh->prio); if (fh->initialized) ch->initialized = 0; filep->private_data = NULL; kfree(fh); return 0; } /** * vpif_reqbufs() - request buffer handler * @file: file ptr * @priv: file handle * @reqbuf: request buffer structure ptr */ static int vpif_reqbufs(struct file *file, void *priv, struct v4l2_requestbuffers *reqbuf) { struct vpif_fh *fh = priv; struct channel_obj *ch = fh->channel; struct common_obj *common; u8 index = 0; int ret = 0; vpif_dbg(2, debug, "vpif_reqbufs\n"); /** * This file handle has not initialized the channel, * It is not allowed to do settings */ if ((VPIF_CHANNEL0_VIDEO == ch->channel_id) || (VPIF_CHANNEL1_VIDEO == ch->channel_id)) { if (!fh->initialized) { vpif_dbg(1, debug, "Channel Busy\n"); return -EBUSY; } } if (V4L2_BUF_TYPE_VIDEO_CAPTURE != reqbuf->type) return -EINVAL; index = VPIF_VIDEO_INDEX; common = &ch->common[index]; if (mutex_lock_interruptible(&common->lock)) return -ERESTARTSYS; if (0 != common->io_usrs) { ret = -EBUSY; goto reqbuf_exit; } /* Initialize videobuf queue as per the buffer type */ videobuf_queue_dma_contig_init(&common->buffer_queue, &video_qops, NULL, &common->irqlock, reqbuf->type, common->fmt.fmt.pix.field, sizeof(struct videobuf_buffer), fh); /* Set io allowed member of file handle to TRUE */ fh->io_allowed[index] = 1; /* Increment io usrs member of channel object to 1 */ common->io_usrs = 1; /* Store type of memory requested in channel object */ common->memory = reqbuf->memory; INIT_LIST_HEAD(&common->dma_queue); /* Allocate buffers */ ret = videobuf_reqbufs(&common->buffer_queue, reqbuf); reqbuf_exit: mutex_unlock(&common->lock); return ret; } /** * vpif_querybuf() - query buffer handler * @file: file ptr * @priv: file handle * @buf: v4l2 buffer structure ptr */ static int vpif_querybuf(struct file *file, void *priv, struct v4l2_buffer *buf) { struct vpif_fh *fh = priv; struct channel_obj *ch = fh->channel; struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX]; vpif_dbg(2, debug, "vpif_querybuf\n"); if (common->fmt.type != buf->type) return -EINVAL; if (common->memory != V4L2_MEMORY_MMAP) { vpif_dbg(1, debug, "Invalid memory\n"); return -EINVAL; } return videobuf_querybuf(&common->buffer_queue, buf); } /** * vpif_qbuf() - query buffer handler * @file: file ptr * @priv: file handle * @buf: v4l2 buffer structure ptr */ static int vpif_qbuf(struct file *file, void *priv, struct v4l2_buffer *buf) { struct vpif_fh *fh = priv; struct channel_obj *ch = fh->channel; struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX]; struct v4l2_buffer tbuf = *buf; struct videobuf_buffer *buf1; unsigned long addr = 0; unsigned long flags; int ret = 0; vpif_dbg(2, debug, "vpif_qbuf\n"); if (common->fmt.type != tbuf.type) { vpif_err("invalid buffer type\n"); return -EINVAL; } if (!fh->io_allowed[VPIF_VIDEO_INDEX]) { vpif_err("fh io not allowed \n"); return -EACCES; } if (!(list_empty(&common->dma_queue)) || (common->cur_frm != common->next_frm) || !common->started || (common->started && (0 == ch->field_id))) return videobuf_qbuf(&common->buffer_queue, buf); /* bufferqueue is empty store buffer address in VPIF registers */ mutex_lock(&common->buffer_queue.vb_lock); buf1 = common->buffer_queue.bufs[tbuf.index]; if ((buf1->state == VIDEOBUF_QUEUED) || (buf1->state == VIDEOBUF_ACTIVE)) { vpif_err("invalid state\n"); goto qbuf_exit; } switch (buf1->memory) { case V4L2_MEMORY_MMAP: if (buf1->baddr == 0) goto qbuf_exit; break; case V4L2_MEMORY_USERPTR: if (tbuf.length < buf1->bsize) goto qbuf_exit; if ((VIDEOBUF_NEEDS_INIT != buf1->state) && (buf1->baddr != tbuf.m.userptr)) { vpif_buffer_release(&common->buffer_queue, buf1); buf1->baddr = tbuf.m.userptr; } break; default: goto qbuf_exit; } local_irq_save(flags); ret = vpif_buffer_prepare(&common->buffer_queue, buf1, common->buffer_queue.field); if (ret < 0) { local_irq_restore(flags); goto qbuf_exit; } buf1->state = VIDEOBUF_ACTIVE; if (V4L2_MEMORY_USERPTR == common->memory) addr = buf1->boff; else addr = videobuf_to_dma_contig(buf1); common->next_frm = buf1; common->set_addr(addr + common->ytop_off, addr + common->ybtm_off, addr + common->ctop_off, addr + common->cbtm_off); local_irq_restore(flags); list_add_tail(&buf1->stream, &common->buffer_queue.stream); mutex_unlock(&common->buffer_queue.vb_lock); return 0; qbuf_exit: mutex_unlock(&common->buffer_queue.vb_lock); return -EINVAL; } /** * vpif_dqbuf() - query buffer handler * @file: file ptr * @priv: file handle * @buf: v4l2 buffer structure ptr */ static int vpif_dqbuf(struct file *file, void *priv, struct v4l2_buffer *buf) { struct vpif_fh *fh = priv; struct channel_obj *ch = fh->channel; struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX]; vpif_dbg(2, debug, "vpif_dqbuf\n"); return videobuf_dqbuf(&common->buffer_queue, buf, file->f_flags & O_NONBLOCK); } /** * vpif_streamon() - streamon handler * @file: file ptr * @priv: file handle * @buftype: v4l2 buffer type */ static int vpif_streamon(struct file *file, void *priv, enum v4l2_buf_type buftype) { struct vpif_capture_config *config = vpif_dev->platform_data; struct vpif_fh *fh = priv; struct channel_obj *ch = fh->channel; struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX]; struct channel_obj *oth_ch = vpif_obj.dev[!ch->channel_id]; struct vpif_params *vpif; unsigned long addr = 0; int ret = 0; vpif_dbg(2, debug, "vpif_streamon\n"); vpif = &ch->vpifparams; if (buftype != V4L2_BUF_TYPE_VIDEO_CAPTURE) { vpif_dbg(1, debug, "buffer type not supported\n"); return -EINVAL; } /* If file handle is not allowed IO, return error */ if (!fh->io_allowed[VPIF_VIDEO_INDEX]) { vpif_dbg(1, debug, "io not allowed\n"); return -EACCES; } /* If Streaming is already started, return error */ if (common->started) { vpif_dbg(1, debug, "channel->started\n"); return -EBUSY; } if ((ch->channel_id == VPIF_CHANNEL0_VIDEO && oth_ch->common[VPIF_VIDEO_INDEX].started && vpif->std_info.ycmux_mode == 0) || ((ch->channel_id == VPIF_CHANNEL1_VIDEO) && (2 == oth_ch->common[VPIF_VIDEO_INDEX].started))) { vpif_dbg(1, debug, "other channel is being used\n"); return -EBUSY; } ret = vpif_check_format(ch, &common->fmt.fmt.pix, 0); if (ret) return ret; /* Enable streamon on the sub device */ ret = v4l2_subdev_call(vpif_obj.sd[ch->curr_sd_index], video, s_stream, 1); if (ret && (ret != -ENOIOCTLCMD)) { vpif_dbg(1, debug, "stream on failed in subdev\n"); return ret; } /* Call videobuf_streamon to start streaming in videobuf */ ret = videobuf_streamon(&common->buffer_queue); if (ret) { vpif_dbg(1, debug, "videobuf_streamon\n"); return ret; } if (mutex_lock_interruptible(&common->lock)) { ret = -ERESTARTSYS; goto streamoff_exit; } /* If buffer queue is empty, return error */ if (list_empty(&common->dma_queue)) { vpif_dbg(1, debug, "buffer queue is empty\n"); ret = -EIO; goto exit; } /* Get the next frame from the buffer queue */ common->cur_frm = list_entry(common->dma_queue.next, struct videobuf_buffer, queue); common->next_frm = common->cur_frm; /* Remove buffer from the buffer queue */ list_del(&common->cur_frm->queue); /* Mark state of the current frame to active */ common->cur_frm->state = VIDEOBUF_ACTIVE; /* Initialize field_id and started member */ ch->field_id = 0; common->started = 1; if (V4L2_MEMORY_USERPTR == common->memory) addr = common->cur_frm->boff; else addr = videobuf_to_dma_contig(common->cur_frm); /* Calculate the offset for Y and C data in the buffer */ vpif_calculate_offsets(ch); if ((vpif->std_info.frm_fmt && ((common->fmt.fmt.pix.field != V4L2_FIELD_NONE) && (common->fmt.fmt.pix.field != V4L2_FIELD_ANY))) || (!vpif->std_info.frm_fmt && (common->fmt.fmt.pix.field == V4L2_FIELD_NONE))) { vpif_dbg(1, debug, "conflict in field format and std format\n"); ret = -EINVAL; goto exit; } /* configure 1 or 2 channel mode */ ret = config->setup_input_channel_mode(vpif->std_info.ycmux_mode); if (ret < 0) { vpif_dbg(1, debug, "can't set vpif channel mode\n"); goto exit; } /* Call vpif_set_params function to set the parameters and addresses */ ret = vpif_set_video_params(vpif, ch->channel_id); if (ret < 0) { vpif_dbg(1, debug, "can't set video params\n"); goto exit; } common->started = ret; vpif_config_addr(ch, ret); common->set_addr(addr + common->ytop_off, addr + common->ybtm_off, addr + common->ctop_off, addr + common->cbtm_off); /** * Set interrupt for both the fields in VPIF Register enable channel in * VPIF register */ if ((VPIF_CHANNEL0_VIDEO == ch->channel_id)) { channel0_intr_assert(); channel0_intr_enable(1); enable_channel0(1); } if ((VPIF_CHANNEL1_VIDEO == ch->channel_id) || (common->started == 2)) { channel1_intr_assert(); channel1_intr_enable(1); enable_channel1(1); } channel_first_int[VPIF_VIDEO_INDEX][ch->channel_id] = 1; mutex_unlock(&common->lock); return ret; exit: mutex_unlock(&common->lock); streamoff_exit: ret = videobuf_streamoff(&common->buffer_queue); return ret; } /** * vpif_streamoff() - streamoff handler * @file: file ptr * @priv: file handle * @buftype: v4l2 buffer type */ static int vpif_streamoff(struct file *file, void *priv, enum v4l2_buf_type buftype) { struct vpif_fh *fh = priv; struct channel_obj *ch = fh->channel; struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX]; int ret; vpif_dbg(2, debug, "vpif_streamoff\n"); if (buftype != V4L2_BUF_TYPE_VIDEO_CAPTURE) { vpif_dbg(1, debug, "buffer type not supported\n"); return -EINVAL; } /* If io is allowed for this file handle, return error */ if (!fh->io_allowed[VPIF_VIDEO_INDEX]) { vpif_dbg(1, debug, "io not allowed\n"); return -EACCES; } /* If streaming is not started, return error */ if (!common->started) { vpif_dbg(1, debug, "channel->started\n"); return -EINVAL; } if (mutex_lock_interruptible(&common->lock)) return -ERESTARTSYS; /* disable channel */ if (VPIF_CHANNEL0_VIDEO == ch->channel_id) { enable_channel0(0); channel0_intr_enable(0); } else { enable_channel1(0); channel1_intr_enable(0); } common->started = 0; ret = v4l2_subdev_call(vpif_obj.sd[ch->curr_sd_index], video, s_stream, 0); if (ret && (ret != -ENOIOCTLCMD)) vpif_dbg(1, debug, "stream off failed in subdev\n"); mutex_unlock(&common->lock); return videobuf_streamoff(&common->buffer_queue); } /** * vpif_map_sub_device_to_input() - Maps sub device to input * @ch - ptr to channel * @config - ptr to capture configuration * @input_index - Given input index from application * @sub_device_index - index into sd table * * lookup the sub device information for a given input index. * we report all the inputs to application. inputs table also * has sub device name for the each input */ static struct vpif_subdev_info *vpif_map_sub_device_to_input( struct channel_obj *ch, struct vpif_capture_config *vpif_cfg, int input_index, int *sub_device_index) { struct vpif_capture_chan_config *chan_cfg; struct vpif_subdev_info *subdev_info = NULL; const char *subdev_name = NULL; int i; vpif_dbg(2, debug, "vpif_map_sub_device_to_input\n"); chan_cfg = &vpif_cfg->chan_config[ch->channel_id]; /** * search through the inputs to find the sub device supporting * the input */ for (i = 0; i < chan_cfg->input_count; i++) { /* For each sub device, loop through input */ if (i == input_index) { subdev_name = chan_cfg->inputs[i].subdev_name; break; } } /* if reached maximum. return null */ if (i == chan_cfg->input_count || (NULL == subdev_name)) return subdev_info; /* loop through the sub device list to get the sub device info */ for (i = 0; i < vpif_cfg->subdev_count; i++) { subdev_info = &vpif_cfg->subdev_info[i]; if (!strcmp(subdev_info->name, subdev_name)) break; } if (i == vpif_cfg->subdev_count) return subdev_info; /* check if the sub device is registered */ if (NULL == vpif_obj.sd[i]) return NULL; *sub_device_index = i; return subdev_info; } /** * vpif_querystd() - querystd handler * @file: file ptr * @priv: file handle * @std_id: ptr to std id * * This function is called to detect standard at the selected input */ static int vpif_querystd(struct file *file, void *priv, v4l2_std_id *std_id) { struct vpif_fh *fh = priv; struct channel_obj *ch = fh->channel; struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX]; int ret = 0; vpif_dbg(2, debug, "vpif_querystd\n"); if (mutex_lock_interruptible(&common->lock)) return -ERESTARTSYS; /* Call querystd function of decoder device */ ret = v4l2_subdev_call(vpif_obj.sd[ch->curr_sd_index], video, querystd, std_id); if (ret < 0) vpif_dbg(1, debug, "Failed to set standard for sub devices\n"); mutex_unlock(&common->lock); return ret; } /** * vpif_g_std() - get STD handler * @file: file ptr * @priv: file handle * @std_id: ptr to std id */ static int vpif_g_std(struct file *file, void *priv, v4l2_std_id *std) { struct vpif_fh *fh = priv; struct channel_obj *ch = fh->channel; vpif_dbg(2, debug, "vpif_g_std\n"); *std = ch->video.stdid; return 0; } /** * vpif_s_std() - set STD handler * @file: file ptr * @priv: file handle * @std_id: ptr to std id */ static int vpif_s_std(struct file *file, void *priv, v4l2_std_id *std_id) { struct vpif_fh *fh = priv; struct channel_obj *ch = fh->channel; struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX]; int ret = 0; vpif_dbg(2, debug, "vpif_s_std\n"); if (common->started) { vpif_err("streaming in progress\n"); return -EBUSY; } if ((VPIF_CHANNEL0_VIDEO == ch->channel_id) || (VPIF_CHANNEL1_VIDEO == ch->channel_id)) { if (!fh->initialized) { vpif_dbg(1, debug, "Channel Busy\n"); return -EBUSY; } } ret = v4l2_prio_check(&ch->prio, fh->prio); if (0 != ret) return ret; fh->initialized = 1; /* Call encoder subdevice function to set the standard */ if (mutex_lock_interruptible(&common->lock)) return -ERESTARTSYS; ch->video.stdid = *std_id; /* Get the information about the standard */ if (vpif_update_std_info(ch)) { ret = -EINVAL; vpif_err("Error getting the standard info\n"); goto s_std_exit; } /* Configure the default format information */ vpif_config_format(ch); /* set standard in the sub device */ ret = v4l2_subdev_call(vpif_obj.sd[ch->curr_sd_index], core, s_std, *std_id); if (ret < 0) vpif_dbg(1, debug, "Failed to set standard for sub devices\n"); s_std_exit: mutex_unlock(&common->lock); return ret; } /** * vpif_enum_input() - ENUMINPUT handler * @file: file ptr * @priv: file handle * @input: ptr to input structure */ static int vpif_enum_input(struct file *file, void *priv, struct v4l2_input *input) { struct vpif_capture_config *config = vpif_dev->platform_data; struct vpif_capture_chan_config *chan_cfg; struct vpif_fh *fh = priv; struct channel_obj *ch = fh->channel; chan_cfg = &config->chan_config[ch->channel_id]; if (input->index >= chan_cfg->input_count) { vpif_dbg(1, debug, "Invalid input index\n"); return -EINVAL; } memcpy(input, &chan_cfg->inputs[input->index].input, sizeof(*input)); return 0; } /** * vpif_g_input() - Get INPUT handler * @file: file ptr * @priv: file handle * @index: ptr to input index */ static int vpif_g_input(struct file *file, void *priv, unsigned int *index) { struct vpif_fh *fh = priv; struct channel_obj *ch = fh->channel; struct video_obj *vid_ch = &ch->video; *index = vid_ch->input_idx; return 0; } /** * vpif_s_input() - Set INPUT handler * @file: file ptr * @priv: file handle * @index: input index */ static int vpif_s_input(struct file *file, void *priv, unsigned int index) { struct vpif_capture_config *config = vpif_dev->platform_data; struct vpif_capture_chan_config *chan_cfg; struct vpif_fh *fh = priv; struct channel_obj *ch = fh->channel; struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX]; struct video_obj *vid_ch = &ch->video; struct vpif_subdev_info *subdev_info; int ret = 0, sd_index = 0; u32 input = 0, output = 0; chan_cfg = &config->chan_config[ch->channel_id]; if (common->started) { vpif_err("Streaming in progress\n"); return -EBUSY; } if ((VPIF_CHANNEL0_VIDEO == ch->channel_id) || (VPIF_CHANNEL1_VIDEO == ch->channel_id)) { if (!fh->initialized) { vpif_dbg(1, debug, "Channel Busy\n"); return -EBUSY; } } ret = v4l2_prio_check(&ch->prio, fh->prio); if (0 != ret) return ret; fh->initialized = 1; subdev_info = vpif_map_sub_device_to_input(ch, config, index, &sd_index); if (NULL == subdev_info) { vpif_dbg(1, debug, "couldn't lookup sub device for the input index\n"); return -EINVAL; } if (mutex_lock_interruptible(&common->lock)) return -ERESTARTSYS; /* first setup input path from sub device to vpif */ if (config->setup_input_path) { ret = config->setup_input_path(ch->channel_id, subdev_info->name); if (ret < 0) { vpif_dbg(1, debug, "couldn't setup input path for the" " sub device %s, for input index %d\n", subdev_info->name, index); goto exit; } } if (subdev_info->can_route) { input = subdev_info->input; output = subdev_info->output; ret = v4l2_subdev_call(vpif_obj.sd[sd_index], video, s_routing, input, output, 0); if (ret < 0) { vpif_dbg(1, debug, "Failed to set input\n"); goto exit; } } vid_ch->input_idx = index; ch->curr_subdev_info = subdev_info; ch->curr_sd_index = sd_index; /* copy interface parameters to vpif */ ch->vpifparams.iface = subdev_info->vpif_if; /* update tvnorms from the sub device input info */ ch->video_dev->tvnorms = chan_cfg->inputs[index].input.std; exit: mutex_unlock(&common->lock); return ret; } /** * vpif_enum_fmt_vid_cap() - ENUM_FMT handler * @file: file ptr * @priv: file handle * @index: input index */ static int vpif_enum_fmt_vid_cap(struct file *file, void *priv, struct v4l2_fmtdesc *fmt) { struct vpif_fh *fh = priv; struct channel_obj *ch = fh->channel; if (fmt->index != 0) { vpif_dbg(1, debug, "Invalid format index\n"); return -EINVAL; } /* Fill in the information about format */ if (ch->vpifparams.iface.if_type == VPIF_IF_RAW_BAYER) { fmt->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; strcpy(fmt->description, "Raw Mode -Bayer Pattern GrRBGb"); fmt->pixelformat = V4L2_PIX_FMT_SBGGR8; } else { fmt->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; strcpy(fmt->description, "YCbCr4:2:2 YC Planar"); fmt->pixelformat = V4L2_PIX_FMT_YUV422P; } return 0; } /** * vpif_try_fmt_vid_cap() - TRY_FMT handler * @file: file ptr * @priv: file handle * @fmt: ptr to v4l2 format structure */ static int vpif_try_fmt_vid_cap(struct file *file, void *priv, struct v4l2_format *fmt) { struct vpif_fh *fh = priv; struct channel_obj *ch = fh->channel; struct v4l2_pix_format *pixfmt = &fmt->fmt.pix; return vpif_check_format(ch, pixfmt, 1); } /** * vpif_g_fmt_vid_cap() - Set INPUT handler * @file: file ptr * @priv: file handle * @fmt: ptr to v4l2 format structure */ static int vpif_g_fmt_vid_cap(struct file *file, void *priv, struct v4l2_format *fmt) { struct vpif_fh *fh = priv; struct channel_obj *ch = fh->channel; struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX]; /* Check the validity of the buffer type */ if (common->fmt.type != fmt->type) return -EINVAL; /* Fill in the information about format */ if (mutex_lock_interruptible(&common->lock)) return -ERESTARTSYS; *fmt = common->fmt; mutex_unlock(&common->lock); return 0; } /** * vpif_s_fmt_vid_cap() - Set FMT handler * @file: file ptr * @priv: file handle * @fmt: ptr to v4l2 format structure */ static int vpif_s_fmt_vid_cap(struct file *file, void *priv, struct v4l2_format *fmt) { struct vpif_fh *fh = priv; struct channel_obj *ch = fh->channel; struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX]; struct v4l2_pix_format *pixfmt; int ret = 0; vpif_dbg(2, debug, "VIDIOC_S_FMT\n"); /* If streaming is started, return error */ if (common->started) { vpif_dbg(1, debug, "Streaming is started\n"); return -EBUSY; } if ((VPIF_CHANNEL0_VIDEO == ch->channel_id) || (VPIF_CHANNEL1_VIDEO == ch->channel_id)) { if (!fh->initialized) { vpif_dbg(1, debug, "Channel Busy\n"); return -EBUSY; } } ret = v4l2_prio_check(&ch->prio, fh->prio); if (0 != ret) return ret; fh->initialized = 1; pixfmt = &fmt->fmt.pix; /* Check for valid field format */ ret = vpif_check_format(ch, pixfmt, 0); if (ret) return ret; /* store the format in the channel object */ if (mutex_lock_interruptible(&common->lock)) return -ERESTARTSYS; common->fmt = *fmt; mutex_unlock(&common->lock); return 0; } /** * vpif_querycap() - QUERYCAP handler * @file: file ptr * @priv: file handle * @cap: ptr to v4l2_capability structure */ static int vpif_querycap(struct file *file, void *priv, struct v4l2_capability *cap) { struct vpif_capture_config *config = vpif_dev->platform_data; cap->version = VPIF_CAPTURE_VERSION_CODE; cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING; strlcpy(cap->driver, "vpif capture", sizeof(cap->driver)); strlcpy(cap->bus_info, "DM646x Platform", sizeof(cap->bus_info)); strlcpy(cap->card, config->card_name, sizeof(cap->card)); return 0; } /** * vpif_g_priority() - get priority handler * @file: file ptr * @priv: file handle * @prio: ptr to v4l2_priority structure */ static int vpif_g_priority(struct file *file, void *priv, enum v4l2_priority *prio) { struct vpif_fh *fh = priv; struct channel_obj *ch = fh->channel; *prio = v4l2_prio_max(&ch->prio); return 0; } /** * vpif_s_priority() - set priority handler * @file: file ptr * @priv: file handle * @prio: ptr to v4l2_priority structure */ static int vpif_s_priority(struct file *file, void *priv, enum v4l2_priority p) { struct vpif_fh *fh = priv; struct channel_obj *ch = fh->channel; return v4l2_prio_change(&ch->prio, &fh->prio, p); } /** * vpif_cropcap() - cropcap handler * @file: file ptr * @priv: file handle * @crop: ptr to v4l2_cropcap structure */ static int vpif_cropcap(struct file *file, void *priv, struct v4l2_cropcap *crop) { struct vpif_fh *fh = priv; struct channel_obj *ch = fh->channel; struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX]; if (V4L2_BUF_TYPE_VIDEO_CAPTURE != crop->type) return -EINVAL; crop->bounds.left = 0; crop->bounds.top = 0; crop->bounds.height = common->height; crop->bounds.width = common->width; crop->defrect = crop->bounds; return 0; } /* vpif capture ioctl operations */ static const struct v4l2_ioctl_ops vpif_ioctl_ops = { .vidioc_querycap = vpif_querycap, .vidioc_g_priority = vpif_g_priority, .vidioc_s_priority = vpif_s_priority, .vidioc_enum_fmt_vid_cap = vpif_enum_fmt_vid_cap, .vidioc_g_fmt_vid_cap = vpif_g_fmt_vid_cap, .vidioc_s_fmt_vid_cap = vpif_s_fmt_vid_cap, .vidioc_try_fmt_vid_cap = vpif_try_fmt_vid_cap, .vidioc_enum_input = vpif_enum_input, .vidioc_s_input = vpif_s_input, .vidioc_g_input = vpif_g_input, .vidioc_reqbufs = vpif_reqbufs, .vidioc_querybuf = vpif_querybuf, .vidioc_querystd = vpif_querystd, .vidioc_s_std = vpif_s_std, .vidioc_g_std = vpif_g_std, .vidioc_qbuf = vpif_qbuf, .vidioc_dqbuf = vpif_dqbuf, .vidioc_streamon = vpif_streamon, .vidioc_streamoff = vpif_streamoff, .vidioc_cropcap = vpif_cropcap, }; /* vpif file operations */ static struct v4l2_file_operations vpif_fops = { .owner = THIS_MODULE, .open = vpif_open, .release = vpif_release, .ioctl = video_ioctl2, .mmap = vpif_mmap, .poll = vpif_poll }; /* vpif video template */ static struct video_device vpif_video_template = { .name = "vpif", .fops = &vpif_fops, .minor = -1, .ioctl_ops = &vpif_ioctl_ops, }; /** * initialize_vpif() - Initialize vpif data structures * * Allocate memory for data structures and initialize them */ static int initialize_vpif(void) { int err = 0, i, j; int free_channel_objects_index; /* Default number of buffers should be 3 */ if ((ch0_numbuffers > 0) && (ch0_numbuffers < config_params.min_numbuffers)) ch0_numbuffers = config_params.min_numbuffers; if ((ch1_numbuffers > 0) && (ch1_numbuffers < config_params.min_numbuffers)) ch1_numbuffers = config_params.min_numbuffers; /* Set buffer size to min buffers size if it is invalid */ if (ch0_bufsize < config_params.min_bufsize[VPIF_CHANNEL0_VIDEO]) ch0_bufsize = config_params.min_bufsize[VPIF_CHANNEL0_VIDEO]; if (ch1_bufsize < config_params.min_bufsize[VPIF_CHANNEL1_VIDEO]) ch1_bufsize = config_params.min_bufsize[VPIF_CHANNEL1_VIDEO]; config_params.numbuffers[VPIF_CHANNEL0_VIDEO] = ch0_numbuffers; config_params.numbuffers[VPIF_CHANNEL1_VIDEO] = ch1_numbuffers; if (ch0_numbuffers) { config_params.channel_bufsize[VPIF_CHANNEL0_VIDEO] = ch0_bufsize; } if (ch1_numbuffers) { config_params.channel_bufsize[VPIF_CHANNEL1_VIDEO] = ch1_bufsize; } /* Allocate memory for six channel objects */ for (i = 0; i < VPIF_CAPTURE_MAX_DEVICES; i++) { vpif_obj.dev[i] = kzalloc(sizeof(*vpif_obj.dev[i]), GFP_KERNEL); /* If memory allocation fails, return error */ if (!vpif_obj.dev[i]) { free_channel_objects_index = i; err = -ENOMEM; goto vpif_init_free_channel_objects; } } return 0; vpif_init_free_channel_objects: for (j = 0; j < free_channel_objects_index; j++) kfree(vpif_obj.dev[j]); return err; } /** * vpif_probe : This function probes the vpif capture driver * @pdev: platform device pointer * * This creates device entries by register itself to the V4L2 driver and * initializes fields of each channel objects */ static __init int vpif_probe(struct platform_device *pdev) { struct vpif_subdev_info *subdevdata; struct vpif_capture_config *config; int i, j, k, m, q, err; struct i2c_adapter *i2c_adap; struct channel_obj *ch; struct common_obj *common; struct video_device *vfd; struct resource *res; int subdev_count; vpif_dev = &pdev->dev; err = initialize_vpif(); if (err) { v4l2_err(vpif_dev->driver, "Error initializing vpif\n"); return err; } k = 0; while ((res = platform_get_resource(pdev, IORESOURCE_IRQ, k))) { for (i = res->start; i <= res->end; i++) { if (request_irq(i, vpif_channel_isr, IRQF_DISABLED, "DM646x_Capture", (void *)(&vpif_obj.dev[k]->channel_id))) { err = -EBUSY; i--; goto vpif_int_err; } } k++; } for (i = 0; i < VPIF_CAPTURE_MAX_DEVICES; i++) { /* Get the pointer to the channel object */ ch = vpif_obj.dev[i]; /* Allocate memory for video device */ vfd = video_device_alloc(); if (NULL == vfd) { for (j = 0; j < i; j++) { ch = vpif_obj.dev[j]; video_device_release(ch->video_dev); } err = -ENOMEM; goto vpif_dev_alloc_err; } /* Initialize field of video device */ *vfd = vpif_video_template; vfd->v4l2_dev = &vpif_obj.v4l2_dev; vfd->release = video_device_release; snprintf(vfd->name, sizeof(vfd->name), "DM646x_VPIFCapture_DRIVER_V%d.%d.%d", (VPIF_CAPTURE_VERSION_CODE >> 16) & 0xff, (VPIF_CAPTURE_VERSION_CODE >> 8) & 0xff, (VPIF_CAPTURE_VERSION_CODE) & 0xff); /* Set video_dev to the video device */ ch->video_dev = vfd; } for (j = 0; j < VPIF_CAPTURE_MAX_DEVICES; j++) { ch = vpif_obj.dev[j]; ch->channel_id = j; common = &(ch->common[VPIF_VIDEO_INDEX]); spin_lock_init(&common->irqlock); mutex_init(&common->lock); /* Initialize prio member of channel object */ v4l2_prio_init(&ch->prio); err = video_register_device(ch->video_dev, VFL_TYPE_GRABBER, (j ? 1 : 0)); if (err) goto probe_out; video_set_drvdata(ch->video_dev, ch); } i2c_adap = i2c_get_adapter(1); config = pdev->dev.platform_data; subdev_count = config->subdev_count; vpif_obj.sd = kmalloc(sizeof(struct v4l2_subdev *) * subdev_count, GFP_KERNEL); if (vpif_obj.sd == NULL) { vpif_err("unable to allocate memory for subdevice pointers\n"); err = -ENOMEM; goto probe_out; } err = v4l2_device_register(vpif_dev, &vpif_obj.v4l2_dev); if (err) { v4l2_err(vpif_dev->driver, "Error registering v4l2 device\n"); goto probe_subdev_out; } for (i = 0; i < subdev_count; i++) { subdevdata = &config->subdev_info[i]; vpif_obj.sd[i] = v4l2_i2c_new_subdev_board(&vpif_obj.v4l2_dev, i2c_adap, subdevdata->name, &subdevdata->board_info, NULL); if (!vpif_obj.sd[i]) { vpif_err("Error registering v4l2 subdevice\n"); goto probe_subdev_out; } v4l2_info(&vpif_obj.v4l2_dev, "registered sub device %s\n", subdevdata->name); if (vpif_obj.sd[i]) vpif_obj.sd[i]->grp_id = 1 << i; } v4l2_info(&vpif_obj.v4l2_dev, "DM646x VPIF Capture driver" " initialized\n"); return 0; probe_subdev_out: /* free sub devices memory */ kfree(vpif_obj.sd); j = VPIF_CAPTURE_MAX_DEVICES; probe_out: v4l2_device_unregister(&vpif_obj.v4l2_dev); for (k = 0; k < j; k++) { /* Get the pointer to the channel object */ ch = vpif_obj.dev[k]; /* Unregister video device */ video_unregister_device(ch->video_dev); } vpif_dev_alloc_err: k = VPIF_CAPTURE_MAX_DEVICES-1; res = platform_get_resource(pdev, IORESOURCE_IRQ, k); i = res->end; vpif_int_err: for (q = k; q >= 0; q--) { for (m = i; m >= (int)res->start; m--) free_irq(m, (void *)(&vpif_obj.dev[q]->channel_id)); res = platform_get_resource(pdev, IORESOURCE_IRQ, q-1); if (res) i = res->end; } return err; } /** * vpif_remove() - driver remove handler * @device: ptr to platform device structure * * The vidoe device is unregistered */ static int vpif_remove(struct platform_device *device) { int i; struct channel_obj *ch; v4l2_device_unregister(&vpif_obj.v4l2_dev); /* un-register device */ for (i = 0; i < VPIF_CAPTURE_MAX_DEVICES; i++) { /* Get the pointer to the channel object */ ch = vpif_obj.dev[i]; /* Unregister video device */ video_unregister_device(ch->video_dev); } return 0; } /** * vpif_suspend: vpif device suspend * * TODO: Add suspend code here */ static int vpif_suspend(struct device *dev) { return -1; } /** * vpif_resume: vpif device suspend * * TODO: Add resume code here */ static int vpif_resume(struct device *dev) { return -1; } static const struct dev_pm_ops vpif_dev_pm_ops = { .suspend = vpif_suspend, .resume = vpif_resume, }; static struct platform_driver vpif_driver = { .driver = { .name = "vpif_capture", .owner = THIS_MODULE, .pm = &vpif_dev_pm_ops, }, .probe = vpif_probe, .remove = vpif_remove, }; /** * vpif_init: initialize the vpif driver * * This function registers device and driver to the kernel, requests irq * handler and allocates memory * for channel objects */ static __init int vpif_init(void) { return platform_driver_register(&vpif_driver); } /** * vpif_cleanup : This function clean up the vpif capture resources * * This will un-registers device and driver to the kernel, frees * requested irq handler and de-allocates memory allocated for channel * objects. */ static void vpif_cleanup(void) { struct platform_device *pdev; struct resource *res; int irq_num; int i = 0; pdev = container_of(vpif_dev, struct platform_device, dev); while ((res = platform_get_resource(pdev, IORESOURCE_IRQ, i))) { for (irq_num = res->start; irq_num <= res->end; irq_num++) free_irq(irq_num, (void *)(&vpif_obj.dev[i]->channel_id)); i++; } platform_driver_unregister(&vpif_driver); kfree(vpif_obj.sd); for (i = 0; i < VPIF_CAPTURE_MAX_DEVICES; i++) kfree(vpif_obj.dev[i]); } /* Function for module initialization and cleanup */ module_init(vpif_init); module_exit(vpif_cleanup);