diff options
Diffstat (limited to 'drivers/media/video/davinci/vpif_capture.c')
| -rw-r--r-- | drivers/media/video/davinci/vpif_capture.c | 2168 |
1 files changed, 2168 insertions, 0 deletions
diff --git a/drivers/media/video/davinci/vpif_capture.c b/drivers/media/video/davinci/vpif_capture.c new file mode 100644 index 000000000000..d947ee5e4eb4 --- /dev/null +++ b/drivers/media/video/davinci/vpif_capture.c @@ -0,0 +1,2168 @@ +/* + * 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 <linux/kernel.h> +#include <linux/init.h> +#include <linux/module.h> +#include <linux/errno.h> +#include <linux/fs.h> +#include <linux/mm.h> +#include <linux/interrupt.h> +#include <linux/workqueue.h> +#include <linux/string.h> +#include <linux/videodev2.h> +#include <linux/wait.h> +#include <linux/time.h> +#include <linux/i2c.h> +#include <linux/platform_device.h> +#include <linux/io.h> +#include <linux/version.h> +#include <media/v4l2-device.h> +#include <media/v4l2-ioctl.h> + +#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 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); |