/* * vpif-display - VPIF display driver * Display driver for TI DaVinci VPIF * * Copyright (C) 2009 Texas Instruments Incorporated - http://www.ti.com/ * * 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 version 2. * * This program is distributed .as is. WITHOUT ANY WARRANTY of any * kind, whether express or implied; without even the implied warranty * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "vpif_display.h" #include "vpif.h" MODULE_DESCRIPTION("TI DaVinci VPIF Display driver"); MODULE_LICENSE("GPL"); #define DM646X_V4L2_STD (V4L2_STD_525_60 | V4L2_STD_625_50) #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 ch2_numbuffers = 3; static u32 ch3_numbuffers = 3; static u32 ch2_bufsize = 1920 * 1080 * 2; static u32 ch3_bufsize = 720 * 576 * 2; module_param(debug, int, 0644); module_param(ch2_numbuffers, uint, S_IRUGO); module_param(ch3_numbuffers, uint, S_IRUGO); module_param(ch2_bufsize, uint, S_IRUGO); module_param(ch3_bufsize, uint, S_IRUGO); MODULE_PARM_DESC(debug, "Debug level 0-1"); MODULE_PARM_DESC(ch2_numbuffers, "Channel2 buffer count (default:3)"); MODULE_PARM_DESC(ch3_numbuffers, "Channel3 buffer count (default:3)"); MODULE_PARM_DESC(ch2_bufsize, "Channel2 buffer size (default:1920 x 1080 x 2)"); MODULE_PARM_DESC(ch3_bufsize, "Channel3 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, }; static struct vpif_device vpif_obj = { {NULL} }; static struct device *vpif_dev; static const struct vpif_channel_config_params ch_params[] = { { "NTSC", 720, 480, 30, 0, 1, 268, 1440, 1, 23, 263, 266, 286, 525, 525, 0, 1, 0, V4L2_STD_525_60, }, { "PAL", 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: This function is used to convert user * space virtual address to physical address. */ static u32 vpif_uservirt_to_phys(u32 virtp) { struct mm_struct *mm = current->mm; unsigned long physp = 0; 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 addr */ 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: This is the callback function called from videobuf_qbuf() * function the buffer is prepared and user space virtual address is converted * into physical address */ static int vpif_buffer_prepare(struct videobuf_queue *q, struct videobuf_buffer *vb, enum v4l2_field field) { struct vpif_fh *fh = q->priv_data; struct common_obj *common; unsigned long addr; common = &fh->channel->common[VPIF_VIDEO_INDEX]; 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 (!vb->baddr) { vpif_err("buffer_address is 0\n"); return -EINVAL; } vb->boff = vpif_uservirt_to_phys(vb->baddr); if (!ISALIGNED(vb->boff)) goto buf_align_exit; } addr = vb->boff; if (q->streaming && (V4L2_BUF_TYPE_SLICED_VBI_OUTPUT != q->type)) { if (!ISALIGNED(addr + common->ytop_off) || !ISALIGNED(addr + common->ybtm_off) || !ISALIGNED(addr + common->ctop_off) || !ISALIGNED(addr + common->cbtm_off)) goto buf_align_exit; } return 0; buf_align_exit: vpif_err("buffer offset not aligned to 8 bytes\n"); return -EINVAL; } /* * vpif_buffer_setup: This function allocates memory for the buffers */ static int vpif_buffer_setup(struct videobuf_queue *q, unsigned int *count, unsigned int *size) { struct vpif_fh *fh = q->priv_data; struct channel_obj *ch = fh->channel; struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX]; if (V4L2_MEMORY_MMAP != common->memory) return 0; *size = config_params.channel_bufsize[ch->channel_id]; if (*count < config_params.min_numbuffers) *count = config_params.min_numbuffers; return 0; } /* * vpif_buffer_queue: This function adds the buffer to DMA queue */ static void vpif_buffer_queue(struct videobuf_queue *q, struct videobuf_buffer *vb) { struct vpif_fh *fh = q->priv_data; struct common_obj *common; common = &fh->channel->common[VPIF_VIDEO_INDEX]; /* add the buffer to the DMA queue */ list_add_tail(&vb->queue, &common->dma_queue); vb->state = VIDEOBUF_QUEUED; } /* * vpif_buffer_release: 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) { struct vpif_fh *fh = q->priv_data; struct channel_obj *ch = fh->channel; struct common_obj *common; unsigned int buf_size = 0; common = &ch->common[VPIF_VIDEO_INDEX]; videobuf_dma_contig_free(q, vb); vb->state = VIDEOBUF_NEEDS_INIT; if (V4L2_MEMORY_MMAP != common->memory) return; buf_size = config_params.channel_bufsize[ch->channel_id]; } 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_NUMOBJECTS][2] = { {1, 1} }; static void process_progressive_mode(struct common_obj *common) { unsigned long addr = 0; /* Get the next buffer from buffer queue */ 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); /* Mark status of the buffer as active */ common->next_frm->state = VIDEOBUF_ACTIVE; /* Set top and bottom field addrs in VPIF registers */ addr = videobuf_to_dma_contig(common->next_frm); common->set_addr(addr + common->ytop_off, addr + common->ybtm_off, addr + common->ctop_off, addr + common->cbtm_off); } static void process_interlaced_mode(int fid, struct common_obj *common) { /* device field id and local field id are in sync */ /* If this is even field */ if (0 == fid) { if (common->cur_frm == common->next_frm) return; /* one frame is displayed If next frame is * available, release cur_frm and move on */ /* Copy frame display time */ do_gettimeofday(&common->cur_frm->ts); /* Change status of the cur_frm */ common->cur_frm->state = VIDEOBUF_DONE; /* unlock semaphore on cur_frm */ wake_up_interruptible(&common->cur_frm->done); /* Make cur_frm pointing to next_frm */ common->cur_frm = common->next_frm; } else if (1 == fid) { /* odd field */ if (list_empty(&common->dma_queue) || (common->cur_frm != common->next_frm)) { return; } /* one field is displayed configure the next * frame if it is available else hold on current * frame */ /* Get next from the buffer queue */ process_progressive_mode(common); } } /* * vpif_channel_isr: It changes status of the displayed 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 channel_obj *ch; struct common_obj *common; enum v4l2_field field; int fid = -1, i; int channel_id = 0; 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_NUMOBJECTS; i++) { common = &ch->common[i]; /* If streaming is started in this channel */ if (0 == common->started) continue; if (1 == ch->vpifparams.std_info.frm_fmt) { if (list_empty(&common->dma_queue)) continue; /* Progressive mode */ if (!channel_first_int[i][channel_id]) { /* Mark status of the cur_frm to * done and unlock semaphore on it */ do_gettimeofday(&common->cur_frm->ts); common->cur_frm->state = VIDEOBUF_DONE; wake_up_interruptible(&common->cur_frm->done); /* Make cur_frm pointing to next_frm */ common->cur_frm = common->next_frm; } channel_first_int[i][channel_id] = 0; process_progressive_mode(common); } 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 + 2); /* If fid does not match with stored field id */ if (fid != ch->field_id) { /* Make them in sync */ if (0 == fid) ch->field_id = fid; return IRQ_HANDLED; } } process_interlaced_mode(fid, common); } } return IRQ_HANDLED; } static int vpif_get_std_info(struct channel_obj *ch) { struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX]; struct video_obj *vid_ch = &ch->video; struct vpif_params *vpifparams = &ch->vpifparams; struct vpif_channel_config_params *std_info = &vpifparams->std_info; const struct vpif_channel_config_params *config; int index; std_info->stdid = vid_ch->stdid; if (!std_info) return -1; for (index = 0; index < ARRAY_SIZE(ch_params); index++) { config = &ch_params[index]; if (config->stdid & std_info->stdid) { memcpy(std_info, config, sizeof(*config)); break; } } if (index == ARRAY_SIZE(ch_params)) return -1; common->fmt.fmt.pix.width = std_info->width; common->fmt.fmt.pix.height = std_info->height; vpif_dbg(1, debug, "Pixel details: Width = %d,Height = %d\n", common->fmt.fmt.pix.width, common->fmt.fmt.pix.height); /* Set height and width paramateres */ ch->common[VPIF_VIDEO_INDEX].height = std_info->height; ch->common[VPIF_VIDEO_INDEX].width = std_info->width; return 0; } /* * vpif_calculate_offsets: This function calculates buffers offset for Y and C * in the top and bottom field */ static void vpif_calculate_offsets(struct channel_obj *ch) { struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX]; struct vpif_params *vpifparams = &ch->vpifparams; enum v4l2_field field = common->fmt.fmt.pix.field; struct video_obj *vid_ch = &ch->video; unsigned int hpitch, vpitch, sizeimage; if (V4L2_FIELD_ANY == common->fmt.fmt.pix.field) { if (ch->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)) { 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) { 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) { 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 (ch->vpifparams.std_info.frm_fmt == 1) { 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 = ch->vpifparams.std_info.stdid; } static void vpif_config_format(struct channel_obj *ch) { struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX]; 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]; common->fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_YUV422P; common->fmt.type = V4L2_BUF_TYPE_VIDEO_OUTPUT; } static int vpif_check_format(struct channel_obj *ch, struct v4l2_pix_format *pixfmt) { struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX]; enum v4l2_field field = pixfmt->field; u32 sizeimage, hpitch, vpitch; if (pixfmt->pixelformat != V4L2_PIX_FMT_YUV422P) goto invalid_fmt_exit; if (!(VPIF_VALID_FIELD(field))) goto invalid_fmt_exit; if (pixfmt->bytesperline <= 0) goto invalid_pitch_exit; if (V4L2_MEMORY_USERPTR == common->memory) sizeimage = pixfmt->sizeimage; else sizeimage = config_params.channel_bufsize[ch->channel_id]; if (vpif_get_std_info(ch)) { vpif_err("Error getting the standard info\n"); return -EINVAL; } hpitch = pixfmt->bytesperline; vpitch = sizeimage / (hpitch * 2); /* Check for valid value of pitch */ if ((hpitch < ch->vpifparams.std_info.width) || (vpitch < ch->vpifparams.std_info.height)) goto invalid_pitch_exit; /* Check for 8 byte alignment */ if (!ISALIGNED(hpitch)) { vpif_err("invalid pitch alignment\n"); return -EINVAL; } pixfmt->width = common->fmt.fmt.pix.width; pixfmt->height = common->fmt.fmt.pix.height; return 0; invalid_fmt_exit: vpif_err("invalid field format\n"); return -EINVAL; invalid_pitch_exit: vpif_err("invalid pitch\n"); return -EINVAL; } static void vpif_config_addr(struct channel_obj *ch, int muxmode) { struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX]; if (VPIF_CHANNEL3_VIDEO == ch->channel_id) { common->set_addr = ch3_set_videobuf_addr; } else { if (2 == muxmode) common->set_addr = ch2_set_videobuf_addr_yc_nmux; else common->set_addr = ch2_set_videobuf_addr; } } /* * vpif_mmap: It is used to map kernel space buffers into user spaces */ static int vpif_mmap(struct file *filep, struct vm_area_struct *vma) { struct vpif_fh *fh = filep->private_data; struct common_obj *common = &fh->channel->common[VPIF_VIDEO_INDEX]; return videobuf_mmap_mapper(&common->buffer_queue, vma); } /* * vpif_poll: It is used for select/poll system call */ static unsigned int vpif_poll(struct file *filep, poll_table *wait) { struct vpif_fh *fh = filep->private_data; struct channel_obj *ch = fh->channel; struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX]; if (common->started) return videobuf_poll_stream(filep, &common->buffer_queue, wait); return 0; } /* * vpif_open: It creates object of file handle structure and stores it in * private_data member of filepointer */ static int vpif_open(struct file *filep) { struct video_device *vdev = video_devdata(filep); struct channel_obj *ch = NULL; struct vpif_fh *fh = NULL; ch = video_get_drvdata(vdev); /* Allocate memory for the file handle object */ fh = kmalloc(sizeof(struct vpif_fh), GFP_KERNEL); if (fh == NULL) { vpif_err("unable to allocate memory for file handle object\n"); return -ENOMEM; } /* store pointer to fh in private_data member of filep */ filep->private_data = fh; fh->channel = ch; fh->initialized = 0; if (!ch->initialized) { fh->initialized = 1; ch->initialized = 1; memset(&ch->vpifparams, 0, sizeof(ch->vpifparams)); } /* Increment channel usrs counter */ atomic_inc(&ch->usrs); /* Set io_allowed[VPIF_VIDEO_INDEX] 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); return 0; } /* * vpif_release: This function deletes buffer queue, frees the buffers and * the vpif 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 = &ch->common[VPIF_VIDEO_INDEX]; mutex_lock_interruptible(&common->lock); /* 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 */ if (VPIF_CHANNEL2_VIDEO == ch->channel_id) { enable_channel2(0); channel2_intr_enable(0); } if ((VPIF_CHANNEL3_VIDEO == ch->channel_id) || (2 == common->started)) { enable_channel3(0); channel3_intr_enable(0); } common->started = 0; /* Free buffers allocated */ videobuf_queue_cancel(&common->buffer_queue); videobuf_mmap_free(&common->buffer_queue); common->numbuffers = config_params.numbuffers[ch->channel_id]; } mutex_unlock(&common->lock); /* Decrement channel usrs counter */ atomic_dec(&ch->usrs); /* If this file handle has initialize encoder device, reset it */ if (fh->initialized) ch->initialized = 0; /* Close the priority */ v4l2_prio_close(&ch->prio, &fh->prio); filep->private_data = NULL; fh->initialized = 0; kfree(fh); return 0; } /* functions implementing ioctls */ static int vpif_querycap(struct file *file, void *priv, struct v4l2_capability *cap) { struct vpif_config *config = vpif_dev->platform_data; cap->version = VPIF_DISPLAY_VERSION_CODE; cap->capabilities = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_STREAMING; strlcpy(cap->driver, "vpif display", sizeof(cap->driver)); strlcpy(cap->bus_info, "Platform", sizeof(cap->bus_info)); strlcpy(cap->card, config->card_name, sizeof(cap->card)); return 0; } static int vpif_enum_fmt_vid_out(struct file *file, void *priv, struct v4l2_fmtdesc *fmt) { if (fmt->index != 0) { vpif_err("Invalid format index\n"); return -EINVAL; } /* Fill in the information about format */ fmt->type = V4L2_BUF_TYPE_VIDEO_OUTPUT; strcpy(fmt->description, "YCbCr4:2:2 YC Planar"); fmt->pixelformat = V4L2_PIX_FMT_YUV422P; return 0; } static int vpif_g_fmt_vid_out(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 */ mutex_lock_interruptible(&common->lock); if (vpif_get_std_info(ch)) { vpif_err("Error getting the standard info\n"); return -EINVAL; } *fmt = common->fmt; mutex_unlock(&common->lock); return 0; } static int vpif_s_fmt_vid_out(struct file *file, void *priv, struct v4l2_format *fmt) { struct vpif_fh *fh = priv; struct v4l2_pix_format *pixfmt; struct channel_obj *ch = fh->channel; struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX]; int ret = 0; if ((VPIF_CHANNEL2_VIDEO == ch->channel_id) || (VPIF_CHANNEL3_VIDEO == ch->channel_id)) { if (!fh->initialized) { vpif_dbg(1, debug, "Channel Busy\n"); return -EBUSY; } /* Check for the priority */ ret = v4l2_prio_check(&ch->prio, &fh->prio); if (0 != ret) return ret; fh->initialized = 1; } if (common->started) { vpif_dbg(1, debug, "Streaming in progress\n"); return -EBUSY; } pixfmt = &fmt->fmt.pix; /* Check for valid field format */ ret = vpif_check_format(ch, pixfmt); if (ret) return ret; /* store the pix format in the channel object */ common->fmt.fmt.pix = *pixfmt; /* store the format in the channel object */ mutex_lock_interruptible(&common->lock); common->fmt = *fmt; mutex_unlock(&common->lock); return 0; } static int vpif_try_fmt_vid_out(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 = &fmt->fmt.pix; int ret = 0; ret = vpif_check_format(ch, pixfmt); if (ret) { *pixfmt = common->fmt.fmt.pix; pixfmt->sizeimage = pixfmt->width * pixfmt->height * 2; } return ret; } 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; enum v4l2_field field; u8 index = 0; int ret = 0; /* This file handle has not initialized the channel, It is not allowed to do settings */ if ((VPIF_CHANNEL2_VIDEO == ch->channel_id) || (VPIF_CHANNEL3_VIDEO == ch->channel_id)) { if (!fh->initialized) { vpif_err("Channel Busy\n"); return -EBUSY; } } if (V4L2_BUF_TYPE_VIDEO_OUTPUT != reqbuf->type) return -EINVAL; index = VPIF_VIDEO_INDEX; common = &ch->common[index]; mutex_lock_interruptible(&common->lock); if (common->fmt.type != reqbuf->type) { ret = -EINVAL; goto reqbuf_exit; } if (0 != common->io_usrs) { ret = -EBUSY; goto reqbuf_exit; } if (reqbuf->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) { if (common->fmt.fmt.pix.field == V4L2_FIELD_ANY) field = V4L2_FIELD_INTERLACED; else field = common->fmt.fmt.pix.field; } else { field = V4L2_VBI_INTERLACED; } /* Initialize videobuf queue as per the buffer type */ videobuf_queue_dma_contig_init(&common->buffer_queue, &video_qops, NULL, &common->irqlock, reqbuf->type, 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; } static int vpif_querybuf(struct file *file, void *priv, struct v4l2_buffer *tbuf) { struct vpif_fh *fh = priv; struct channel_obj *ch = fh->channel; struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX]; if (common->fmt.type != tbuf->type) return -EINVAL; return videobuf_querybuf(&common->buffer_queue, tbuf); } 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; if (common->fmt.type != tbuf.type) return -EINVAL; if (!fh->io_allowed[VPIF_VIDEO_INDEX]) { vpif_err("fh->io_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->memory != tbuf.memory) { vpif_err("invalid buffer type\n"); goto qbuf_exit; } 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; addr = buf1->boff; common->next_frm = buf1; if (tbuf.type != V4L2_BUF_TYPE_SLICED_VBI_OUTPUT) { 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; } 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; if (!(*std_id & DM646X_V4L2_STD)) return -EINVAL; if (common->started) { vpif_err("streaming in progress\n"); return -EBUSY; } /* Call encoder subdevice function to set the standard */ mutex_lock_interruptible(&common->lock); ch->video.stdid = *std_id; /* Get the information about the standard */ if (vpif_get_std_info(ch)) { vpif_err("Error getting the standard info\n"); return -EINVAL; } if ((ch->vpifparams.std_info.width * ch->vpifparams.std_info.height * 2) > config_params.channel_bufsize[ch->channel_id]) { vpif_err("invalid std for this size\n"); ret = -EINVAL; goto s_std_exit; } common->fmt.fmt.pix.bytesperline = common->fmt.fmt.pix.width; /* Configure the default format information */ vpif_config_format(ch); ret = v4l2_device_call_until_err(&vpif_obj.v4l2_dev, 1, video, s_std_output, *std_id); if (ret < 0) { vpif_err("Failed to set output standard\n"); goto s_std_exit; } ret = v4l2_device_call_until_err(&vpif_obj.v4l2_dev, 1, core, s_std, *std_id); if (ret < 0) vpif_err("Failed to set standard for sub devices\n"); s_std_exit: mutex_unlock(&common->lock); return ret; } 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; *std = ch->video.stdid; return 0; } static int vpif_dqbuf(struct file *file, void *priv, struct v4l2_buffer *p) { struct vpif_fh *fh = priv; struct channel_obj *ch = fh->channel; struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX]; return videobuf_dqbuf(&common->buffer_queue, p, (file->f_flags & O_NONBLOCK)); } static int vpif_streamon(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]; struct channel_obj *oth_ch = vpif_obj.dev[!ch->channel_id]; struct vpif_params *vpif = &ch->vpifparams; struct vpif_config *vpif_config_data = vpif_dev->platform_data; unsigned long addr = 0; int ret = 0; if (buftype != V4L2_BUF_TYPE_VIDEO_OUTPUT) { vpif_err("buffer type not supported\n"); return -EINVAL; } if (!fh->io_allowed[VPIF_VIDEO_INDEX]) { vpif_err("fh->io_allowed\n"); return -EACCES; } /* If Streaming is already started, return error */ if (common->started) { vpif_err("channel->started\n"); return -EBUSY; } if ((ch->channel_id == VPIF_CHANNEL2_VIDEO && oth_ch->common[VPIF_VIDEO_INDEX].started && ch->vpifparams.std_info.ycmux_mode == 0) || ((ch->channel_id == VPIF_CHANNEL3_VIDEO) && (2 == oth_ch->common[VPIF_VIDEO_INDEX].started))) { vpif_err("other channel is using\n"); return -EBUSY; } ret = vpif_check_format(ch, &common->fmt.fmt.pix); if (ret < 0) return ret; /* Call videobuf_streamon to start streaming in videobuf */ ret = videobuf_streamon(&common->buffer_queue); if (ret < 0) { vpif_err("videobuf_streamon\n"); return ret; } mutex_lock_interruptible(&common->lock); /* If buffer queue is empty, return error */ if (list_empty(&common->dma_queue)) { vpif_err("buffer queue is empty\n"); ret = -EIO; goto streamon_exit; } /* Get the next frame from the buffer queue */ common->next_frm = common->cur_frm = list_entry(common->dma_queue.next, struct videobuf_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 (buftype == V4L2_BUF_TYPE_VIDEO_OUTPUT) { addr = common->cur_frm->boff; /* Calculate the offset for Y and C data in the buffer */ vpif_calculate_offsets(ch); if ((ch->vpifparams.std_info.frm_fmt && ((common->fmt.fmt.pix.field != V4L2_FIELD_NONE) && (common->fmt.fmt.pix.field != V4L2_FIELD_ANY))) || (!ch->vpifparams.std_info.frm_fmt && (common->fmt.fmt.pix.field == V4L2_FIELD_NONE))) { vpif_err("conflict in field format and std format\n"); ret = -EINVAL; goto streamon_exit; } /* clock settings */ ret = vpif_config_data->set_clock(ch->vpifparams.std_info.ycmux_mode, ch->vpifparams.std_info.hd_sd); if (ret < 0) { vpif_err("can't set clock\n"); goto streamon_exit; } /* set the parameters and addresses */ ret = vpif_set_video_params(vpif, ch->channel_id + 2); if (ret < 0) goto streamon_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_CHANNEL2_VIDEO == ch->channel_id) { channel2_intr_assert(); channel2_intr_enable(1); enable_channel2(1); } if ((VPIF_CHANNEL3_VIDEO == ch->channel_id) || (common->started == 2)) { channel3_intr_assert(); channel3_intr_enable(1); enable_channel3(1); } channel_first_int[VPIF_VIDEO_INDEX][ch->channel_id] = 1; } streamon_exit: mutex_unlock(&common->lock); return ret; } 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]; if (buftype != V4L2_BUF_TYPE_VIDEO_OUTPUT) { vpif_err("buffer type not supported\n"); return -EINVAL; } if (!fh->io_allowed[VPIF_VIDEO_INDEX]) { vpif_err("fh->io_allowed\n"); return -EACCES; } if (!common->started) { vpif_err("channel->started\n"); return -EINVAL; } mutex_lock_interruptible(&common->lock); if (buftype == V4L2_BUF_TYPE_VIDEO_OUTPUT) { /* disable channel */ if (VPIF_CHANNEL2_VIDEO == ch->channel_id) { enable_channel2(0); channel2_intr_enable(0); } if ((VPIF_CHANNEL3_VIDEO == ch->channel_id) || (2 == common->started)) { enable_channel3(0); channel3_intr_enable(0); } } common->started = 0; mutex_unlock(&common->lock); return videobuf_streamoff(&common->buffer_queue); } 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_OUTPUT != crop->type) return -EINVAL; crop->bounds.left = crop->bounds.top = 0; crop->defrect.left = crop->defrect.top = 0; crop->defrect.height = crop->bounds.height = common->height; crop->defrect.width = crop->bounds.width = common->width; return 0; } static int vpif_enum_output(struct file *file, void *fh, struct v4l2_output *output) { struct vpif_config *config = vpif_dev->platform_data; if (output->index >= config->output_count) { vpif_dbg(1, debug, "Invalid output index\n"); return -EINVAL; } strcpy(output->name, config->output[output->index]); output->type = V4L2_OUTPUT_TYPE_ANALOG; output->std = DM646X_V4L2_STD; return 0; } static int vpif_s_output(struct file *file, void *priv, unsigned int i) { struct vpif_fh *fh = priv; struct channel_obj *ch = fh->channel; struct video_obj *vid_ch = &ch->video; struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX]; int ret = 0; mutex_lock_interruptible(&common->lock); if (common->started) { vpif_err("Streaming in progress\n"); ret = -EBUSY; goto s_output_exit; } ret = v4l2_device_call_until_err(&vpif_obj.v4l2_dev, 1, video, s_routing, 0, i, 0); if (ret < 0) vpif_err("Failed to set output standard\n"); vid_ch->output_id = i; s_output_exit: mutex_unlock(&common->lock); return ret; } static int vpif_g_output(struct file *file, void *priv, unsigned int *i) { struct vpif_fh *fh = priv; struct channel_obj *ch = fh->channel; struct video_obj *vid_ch = &ch->video; *i = vid_ch->output_id; return 0; } static int vpif_g_priority(struct file *file, void *priv, enum v4l2_priority *p) { struct vpif_fh *fh = priv; struct channel_obj *ch = fh->channel; *p = v4l2_prio_max(&ch->prio); return 0; } 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 display 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_out = vpif_enum_fmt_vid_out, .vidioc_g_fmt_vid_out = vpif_g_fmt_vid_out, .vidioc_s_fmt_vid_out = vpif_s_fmt_vid_out, .vidioc_try_fmt_vid_out = vpif_try_fmt_vid_out, .vidioc_reqbufs = vpif_reqbufs, .vidioc_querybuf = vpif_querybuf, .vidioc_qbuf = vpif_qbuf, .vidioc_dqbuf = vpif_dqbuf, .vidioc_streamon = vpif_streamon, .vidioc_streamoff = vpif_streamoff, .vidioc_s_std = vpif_s_std, .vidioc_g_std = vpif_g_std, .vidioc_enum_output = vpif_enum_output, .vidioc_s_output = vpif_s_output, .vidioc_g_output = vpif_g_output, .vidioc_cropcap = vpif_cropcap, }; static const struct v4l2_file_operations vpif_fops = { .owner = THIS_MODULE, .open = vpif_open, .release = vpif_release, .ioctl = video_ioctl2, .mmap = vpif_mmap, .poll = vpif_poll }; static struct video_device vpif_video_template = { .name = "vpif", .fops = &vpif_fops, .minor = -1, .ioctl_ops = &vpif_ioctl_ops, .tvnorms = DM646X_V4L2_STD, .current_norm = V4L2_STD_625_50, }; /*Configure the channels, buffer sizei, request irq */ static int initialize_vpif(void) { int free_channel_objects_index; int free_buffer_channel_index; int free_buffer_index; int err = 0, i, j; /* Default number of buffers should be 3 */ if ((ch2_numbuffers > 0) && (ch2_numbuffers < config_params.min_numbuffers)) ch2_numbuffers = config_params.min_numbuffers; if ((ch3_numbuffers > 0) && (ch3_numbuffers < config_params.min_numbuffers)) ch3_numbuffers = config_params.min_numbuffers; /* Set buffer size to min buffers size if invalid buffer size is * given */ if (ch2_bufsize < config_params.min_bufsize[VPIF_CHANNEL2_VIDEO]) ch2_bufsize = config_params.min_bufsize[VPIF_CHANNEL2_VIDEO]; if (ch3_bufsize < config_params.min_bufsize[VPIF_CHANNEL3_VIDEO]) ch3_bufsize = config_params.min_bufsize[VPIF_CHANNEL3_VIDEO]; config_params.numbuffers[VPIF_CHANNEL2_VIDEO] = ch2_numbuffers; if (ch2_numbuffers) { config_params.channel_bufsize[VPIF_CHANNEL2_VIDEO] = ch2_bufsize; } config_params.numbuffers[VPIF_CHANNEL3_VIDEO] = ch3_numbuffers; if (ch3_numbuffers) { config_params.channel_bufsize[VPIF_CHANNEL3_VIDEO] = ch3_bufsize; } /* Allocate memory for six channel objects */ for (i = 0; i < VPIF_DISPLAY_MAX_DEVICES; i++) { vpif_obj.dev[i] = kmalloc(sizeof(struct channel_obj), 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; } } free_channel_objects_index = VPIF_DISPLAY_MAX_DEVICES; free_buffer_channel_index = VPIF_DISPLAY_NUM_CHANNELS; free_buffer_index = config_params.numbuffers[i - 1]; 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 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) { const struct subdev_info *subdevdata; int i, j = 0, k, q, m, err = 0; struct i2c_adapter *i2c_adap; struct vpif_config *config; struct common_obj *common; struct channel_obj *ch; struct video_device *vfd; struct resource *res; int subdev_count; vpif_dev = &pdev->dev; res = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (!res) { v4l2_err(vpif_dev->driver, "Error getting platform resource\n"); return -ENOENT; } if (!request_mem_region(res->start, res->end - res->start + 1, vpif_dev->driver->name)) { v4l2_err(vpif_dev->driver, "VPIF: failed request_mem_region\n"); return -ENXIO; } vpif_base = ioremap_nocache(res->start, res->end - res->start + 1); if (!vpif_base) { v4l2_err(vpif_dev->driver, "Unable to ioremap VPIF reg\n"); err = -ENXIO; goto resource_exit; } vpif_base_addr_init(vpif_base); initialize_vpif(); err = v4l2_device_register(vpif_dev, &vpif_obj.v4l2_dev); if (err) { v4l2_err(vpif_dev->driver, "Error registering v4l2 device\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_Display", (void *)(&vpif_obj.dev[k]->channel_id))) { err = -EBUSY; goto vpif_int_err; } } k++; } for (i = 0; i < VPIF_DISPLAY_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 (vfd == NULL) { for (j = 0; j < i; j++) { ch = vpif_obj.dev[j]; video_device_release(ch->video_dev); } err = -ENOMEM; goto video_dev_alloc_exit; } /* 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_VPIFDisplay_DRIVER_V%d.%d.%d", (VPIF_DISPLAY_VERSION_CODE >> 16) & 0xff, (VPIF_DISPLAY_VERSION_CODE >> 8) & 0xff, (VPIF_DISPLAY_VERSION_CODE) & 0xff); /* Set video_dev to the video device */ ch->video_dev = vfd; } for (j = 0; j < VPIF_DISPLAY_MAX_DEVICES; j++) { ch = vpif_obj.dev[j]; /* Initialize field of the channel objects */ atomic_set(&ch->usrs, 0); for (k = 0; k < VPIF_NUMOBJECTS; k++) { ch->common[k].numbuffers = 0; common = &ch->common[k]; common->io_usrs = 0; common->started = 0; spin_lock_init(&common->irqlock); mutex_init(&common->lock); common->numbuffers = 0; common->set_addr = NULL; common->ytop_off = common->ybtm_off = 0; common->ctop_off = common->cbtm_off = 0; common->cur_frm = common->next_frm = NULL; memset(&common->fmt, 0, sizeof(common->fmt)); common->numbuffers = config_params.numbuffers[k]; } ch->initialized = 0; ch->channel_id = j; if (j < 2) ch->common[VPIF_VIDEO_INDEX].numbuffers = config_params.numbuffers[ch->channel_id]; else ch->common[VPIF_VIDEO_INDEX].numbuffers = 0; memset(&ch->vpifparams, 0, sizeof(ch->vpifparams)); /* Initialize prio member of channel object */ v4l2_prio_init(&ch->prio); ch->common[VPIF_VIDEO_INDEX].fmt.type = V4L2_BUF_TYPE_VIDEO_OUTPUT; /* register video device */ vpif_dbg(1, debug, "channel=%x,channel->video_dev=%x\n", (int)ch, (int)&ch->video_dev); err = video_register_device(ch->video_dev, VFL_TYPE_GRABBER, (j ? 3 : 2)); if (err < 0) 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; subdevdata = config->subdevinfo; 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; } for (i = 0; i < subdev_count; i++) { vpif_obj.sd[i] = v4l2_i2c_new_probed_subdev(&vpif_obj.v4l2_dev, i2c_adap, subdevdata[i].name, subdevdata[i].name, &subdevdata[i].addr); if (!vpif_obj.sd[i]) { vpif_err("Error registering v4l2 subdevice\n"); goto probe_subdev_out; } if (vpif_obj.sd[i]) vpif_obj.sd[i]->grp_id = 1 << i; } return 0; probe_subdev_out: kfree(vpif_obj.sd); probe_out: for (k = 0; k < j; k++) { ch = vpif_obj.dev[k]; video_unregister_device(ch->video_dev); video_device_release(ch->video_dev); ch->video_dev = NULL; } vpif_int_err: v4l2_device_unregister(&vpif_obj.v4l2_dev); vpif_err("VPIF IRQ request failed\n"); for (q = k; k >= 0; k--) { for (m = i; m >= res->start; m--) free_irq(m, (void *)(&vpif_obj.dev[k]->channel_id)); res = platform_get_resource(pdev, IORESOURCE_IRQ, k-1); m = res->end; } video_dev_alloc_exit: iounmap(vpif_base); resource_exit: res = platform_get_resource(pdev, IORESOURCE_MEM, 0); release_mem_region(res->start, res->end - res->start + 1); return err; } /* * vpif_remove: It un-register channels from V4L2 driver */ static int vpif_remove(struct platform_device *device) { struct channel_obj *ch; int i; v4l2_device_unregister(&vpif_obj.v4l2_dev); /* un-register device */ for (i = 0; i < VPIF_DISPLAY_MAX_DEVICES; i++) { /* Get the pointer to the channel object */ ch = vpif_obj.dev[i]; /* Unregister video device */ video_unregister_device(ch->video_dev); ch->video_dev = NULL; } return 0; } static struct platform_driver vpif_driver = { .driver = { .name = "vpif_display", .owner = THIS_MODULE, }, .probe = vpif_probe, .remove = vpif_remove, }; static __init int vpif_init(void) { return platform_driver_register(&vpif_driver); } /* * vpif_cleanup: This function 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++; } iounmap(vpif_base); res = platform_get_resource(pdev, IORESOURCE_MEM, 0); release_mem_region(res->start, res->end - res->start + 1); platform_driver_unregister(&vpif_driver); kfree(vpif_obj.sd); for (i = 0; i < VPIF_DISPLAY_MAX_DEVICES; i++) kfree(vpif_obj.dev[i]); } module_init(vpif_init); module_exit(vpif_cleanup);