diff options
Diffstat (limited to 'drivers/media/video/cx231xx/cx231xx-vbi.c')
| -rw-r--r-- | drivers/media/video/cx231xx/cx231xx-vbi.c | 710 |
1 files changed, 0 insertions, 710 deletions
diff --git a/drivers/media/video/cx231xx/cx231xx-vbi.c b/drivers/media/video/cx231xx/cx231xx-vbi.c deleted file mode 100644 index ac7db52f404f..000000000000 --- a/drivers/media/video/cx231xx/cx231xx-vbi.c +++ /dev/null @@ -1,710 +0,0 @@ -/* - cx231xx_vbi.c - driver for Conexant Cx23100/101/102 USB video capture devices - - Copyright (C) 2008 <srinivasa.deevi at conexant dot com> - Based on cx88 driver - - 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., 675 Mass Ave, Cambridge, MA 02139, USA. - */ - -#include <linux/init.h> -#include <linux/list.h> -#include <linux/module.h> -#include <linux/kernel.h> -#include <linux/bitmap.h> -#include <linux/usb.h> -#include <linux/i2c.h> -#include <linux/mm.h> -#include <linux/mutex.h> -#include <linux/slab.h> - -#include <media/v4l2-common.h> -#include <media/v4l2-ioctl.h> -#include <media/v4l2-chip-ident.h> -#include <media/msp3400.h> -#include <media/tuner.h> - -#include "cx231xx.h" -#include "cx231xx-vbi.h" - -static inline void print_err_status(struct cx231xx *dev, int packet, int status) -{ - char *errmsg = "Unknown"; - - switch (status) { - case -ENOENT: - errmsg = "unlinked synchronuously"; - break; - case -ECONNRESET: - errmsg = "unlinked asynchronuously"; - break; - case -ENOSR: - errmsg = "Buffer error (overrun)"; - break; - case -EPIPE: - errmsg = "Stalled (device not responding)"; - break; - case -EOVERFLOW: - errmsg = "Babble (bad cable?)"; - break; - case -EPROTO: - errmsg = "Bit-stuff error (bad cable?)"; - break; - case -EILSEQ: - errmsg = "CRC/Timeout (could be anything)"; - break; - case -ETIME: - errmsg = "Device does not respond"; - break; - } - if (packet < 0) { - cx231xx_err(DRIVER_NAME "URB status %d [%s].\n", status, - errmsg); - } else { - cx231xx_err(DRIVER_NAME "URB packet %d, status %d [%s].\n", - packet, status, errmsg); - } -} - -/* - * Controls the isoc copy of each urb packet - */ -static inline int cx231xx_isoc_vbi_copy(struct cx231xx *dev, struct urb *urb) -{ - struct cx231xx_dmaqueue *dma_q = urb->context; - int rc = 1; - unsigned char *p_buffer; - u32 bytes_parsed = 0, buffer_size = 0; - u8 sav_eav = 0; - - if (!dev) - return 0; - - if (dev->state & DEV_DISCONNECTED) - return 0; - - if (urb->status < 0) { - print_err_status(dev, -1, urb->status); - if (urb->status == -ENOENT) - return 0; - } - - /* get buffer pointer and length */ - p_buffer = urb->transfer_buffer; - buffer_size = urb->actual_length; - - if (buffer_size > 0) { - bytes_parsed = 0; - - if (dma_q->is_partial_line) { - /* Handle the case where we were working on a partial - line */ - sav_eav = dma_q->last_sav; - } else { - /* Check for a SAV/EAV overlapping the - buffer boundary */ - - sav_eav = cx231xx_find_boundary_SAV_EAV(p_buffer, - dma_q->partial_buf, - &bytes_parsed); - } - - sav_eav &= 0xF0; - /* Get the first line if we have some portion of an SAV/EAV from - the last buffer or a partial line */ - if (sav_eav) { - bytes_parsed += cx231xx_get_vbi_line(dev, dma_q, - sav_eav, /* SAV/EAV */ - p_buffer + bytes_parsed, /* p_buffer */ - buffer_size - bytes_parsed); /* buffer size */ - } - - /* Now parse data that is completely in this buffer */ - dma_q->is_partial_line = 0; - - while (bytes_parsed < buffer_size) { - u32 bytes_used = 0; - - sav_eav = cx231xx_find_next_SAV_EAV( - p_buffer + bytes_parsed, /* p_buffer */ - buffer_size - bytes_parsed, /* buffer size */ - &bytes_used); /* bytes used to get SAV/EAV */ - - bytes_parsed += bytes_used; - - sav_eav &= 0xF0; - if (sav_eav && (bytes_parsed < buffer_size)) { - bytes_parsed += cx231xx_get_vbi_line(dev, - dma_q, sav_eav, /* SAV/EAV */ - p_buffer+bytes_parsed, /* p_buffer */ - buffer_size-bytes_parsed);/*buf size*/ - } - } - - /* Save the last four bytes of the buffer so we can - check the buffer boundary condition next time */ - memcpy(dma_q->partial_buf, p_buffer + buffer_size - 4, 4); - bytes_parsed = 0; - } - - return rc; -} - -/* ------------------------------------------------------------------ - Vbi buf operations - ------------------------------------------------------------------*/ - -static int -vbi_buffer_setup(struct videobuf_queue *vq, unsigned int *count, - unsigned int *size) -{ - struct cx231xx_fh *fh = vq->priv_data; - struct cx231xx *dev = fh->dev; - u32 height = 0; - - height = ((dev->norm & V4L2_STD_625_50) ? - PAL_VBI_LINES : NTSC_VBI_LINES); - - *size = (dev->width * height * 2 * 2); - if (0 == *count) - *count = CX231XX_DEF_VBI_BUF; - - if (*count < CX231XX_MIN_BUF) - *count = CX231XX_MIN_BUF; - - return 0; -} - -/* This is called *without* dev->slock held; please keep it that way */ -static void free_buffer(struct videobuf_queue *vq, struct cx231xx_buffer *buf) -{ - struct cx231xx_fh *fh = vq->priv_data; - struct cx231xx *dev = fh->dev; - unsigned long flags = 0; - if (in_interrupt()) - BUG(); - - /* We used to wait for the buffer to finish here, but this didn't work - because, as we were keeping the state as VIDEOBUF_QUEUED, - videobuf_queue_cancel marked it as finished for us. - (Also, it could wedge forever if the hardware was misconfigured.) - - This should be safe; by the time we get here, the buffer isn't - queued anymore. If we ever start marking the buffers as - VIDEOBUF_ACTIVE, it won't be, though. - */ - spin_lock_irqsave(&dev->vbi_mode.slock, flags); - if (dev->vbi_mode.bulk_ctl.buf == buf) - dev->vbi_mode.bulk_ctl.buf = NULL; - spin_unlock_irqrestore(&dev->vbi_mode.slock, flags); - - videobuf_vmalloc_free(&buf->vb); - buf->vb.state = VIDEOBUF_NEEDS_INIT; -} - -static int -vbi_buffer_prepare(struct videobuf_queue *vq, struct videobuf_buffer *vb, - enum v4l2_field field) -{ - struct cx231xx_fh *fh = vq->priv_data; - struct cx231xx_buffer *buf = - container_of(vb, struct cx231xx_buffer, vb); - struct cx231xx *dev = fh->dev; - int rc = 0, urb_init = 0; - u32 height = 0; - - height = ((dev->norm & V4L2_STD_625_50) ? - PAL_VBI_LINES : NTSC_VBI_LINES); - buf->vb.size = ((dev->width << 1) * height * 2); - - if (0 != buf->vb.baddr && buf->vb.bsize < buf->vb.size) - return -EINVAL; - - buf->vb.width = dev->width; - buf->vb.height = height; - buf->vb.field = field; - buf->vb.field = V4L2_FIELD_SEQ_TB; - - if (VIDEOBUF_NEEDS_INIT == buf->vb.state) { - rc = videobuf_iolock(vq, &buf->vb, NULL); - if (rc < 0) - goto fail; - } - - if (!dev->vbi_mode.bulk_ctl.num_bufs) - urb_init = 1; - - if (urb_init) { - rc = cx231xx_init_vbi_isoc(dev, CX231XX_NUM_VBI_PACKETS, - CX231XX_NUM_VBI_BUFS, - dev->vbi_mode.alt_max_pkt_size[0], - cx231xx_isoc_vbi_copy); - if (rc < 0) - goto fail; - } - - buf->vb.state = VIDEOBUF_PREPARED; - return 0; - -fail: - free_buffer(vq, buf); - return rc; -} - -static void -vbi_buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb) -{ - struct cx231xx_buffer *buf = - container_of(vb, struct cx231xx_buffer, vb); - struct cx231xx_fh *fh = vq->priv_data; - struct cx231xx *dev = fh->dev; - struct cx231xx_dmaqueue *vidq = &dev->vbi_mode.vidq; - - buf->vb.state = VIDEOBUF_QUEUED; - list_add_tail(&buf->vb.queue, &vidq->active); - -} - -static void vbi_buffer_release(struct videobuf_queue *vq, - struct videobuf_buffer *vb) -{ - struct cx231xx_buffer *buf = - container_of(vb, struct cx231xx_buffer, vb); - - - free_buffer(vq, buf); -} - -struct videobuf_queue_ops cx231xx_vbi_qops = { - .buf_setup = vbi_buffer_setup, - .buf_prepare = vbi_buffer_prepare, - .buf_queue = vbi_buffer_queue, - .buf_release = vbi_buffer_release, -}; - -/* ------------------------------------------------------------------ - URB control - ------------------------------------------------------------------*/ - -/* - * IRQ callback, called by URB callback - */ -static void cx231xx_irq_vbi_callback(struct urb *urb) -{ - struct cx231xx_dmaqueue *dma_q = urb->context; - struct cx231xx_video_mode *vmode = - container_of(dma_q, struct cx231xx_video_mode, vidq); - struct cx231xx *dev = container_of(vmode, struct cx231xx, vbi_mode); - - switch (urb->status) { - case 0: /* success */ - case -ETIMEDOUT: /* NAK */ - break; - case -ECONNRESET: /* kill */ - case -ENOENT: - case -ESHUTDOWN: - return; - default: /* error */ - cx231xx_err(DRIVER_NAME "urb completition error %d.\n", - urb->status); - break; - } - - /* Copy data from URB */ - spin_lock(&dev->vbi_mode.slock); - dev->vbi_mode.bulk_ctl.bulk_copy(dev, urb); - spin_unlock(&dev->vbi_mode.slock); - - /* Reset status */ - urb->status = 0; - - urb->status = usb_submit_urb(urb, GFP_ATOMIC); - if (urb->status) { - cx231xx_err(DRIVER_NAME "urb resubmit failed (error=%i)\n", - urb->status); - } -} - -/* - * Stop and Deallocate URBs - */ -void cx231xx_uninit_vbi_isoc(struct cx231xx *dev) -{ - struct urb *urb; - int i; - - cx231xx_info(DRIVER_NAME "cx231xx: called cx231xx_uninit_vbi_isoc\n"); - - dev->vbi_mode.bulk_ctl.nfields = -1; - for (i = 0; i < dev->vbi_mode.bulk_ctl.num_bufs; i++) { - urb = dev->vbi_mode.bulk_ctl.urb[i]; - if (urb) { - if (!irqs_disabled()) - usb_kill_urb(urb); - else - usb_unlink_urb(urb); - - if (dev->vbi_mode.bulk_ctl.transfer_buffer[i]) { - - kfree(dev->vbi_mode.bulk_ctl. - transfer_buffer[i]); - dev->vbi_mode.bulk_ctl.transfer_buffer[i] = - NULL; - } - usb_free_urb(urb); - dev->vbi_mode.bulk_ctl.urb[i] = NULL; - } - dev->vbi_mode.bulk_ctl.transfer_buffer[i] = NULL; - } - - kfree(dev->vbi_mode.bulk_ctl.urb); - kfree(dev->vbi_mode.bulk_ctl.transfer_buffer); - - dev->vbi_mode.bulk_ctl.urb = NULL; - dev->vbi_mode.bulk_ctl.transfer_buffer = NULL; - dev->vbi_mode.bulk_ctl.num_bufs = 0; - - cx231xx_capture_start(dev, 0, Vbi); -} -EXPORT_SYMBOL_GPL(cx231xx_uninit_vbi_isoc); - -/* - * Allocate URBs and start IRQ - */ -int cx231xx_init_vbi_isoc(struct cx231xx *dev, int max_packets, - int num_bufs, int max_pkt_size, - int (*bulk_copy) (struct cx231xx *dev, - struct urb *urb)) -{ - struct cx231xx_dmaqueue *dma_q = &dev->vbi_mode.vidq; - int i; - int sb_size, pipe; - struct urb *urb; - int rc; - - cx231xx_info(DRIVER_NAME "cx231xx: called cx231xx_prepare_isoc\n"); - - /* De-allocates all pending stuff */ - cx231xx_uninit_vbi_isoc(dev); - - /* clear if any halt */ - usb_clear_halt(dev->udev, - usb_rcvbulkpipe(dev->udev, - dev->vbi_mode.end_point_addr)); - - dev->vbi_mode.bulk_ctl.bulk_copy = bulk_copy; - dev->vbi_mode.bulk_ctl.num_bufs = num_bufs; - dma_q->pos = 0; - dma_q->is_partial_line = 0; - dma_q->last_sav = 0; - dma_q->current_field = -1; - dma_q->bytes_left_in_line = dev->width << 1; - dma_q->lines_per_field = ((dev->norm & V4L2_STD_625_50) ? - PAL_VBI_LINES : NTSC_VBI_LINES); - dma_q->lines_completed = 0; - for (i = 0; i < 8; i++) - dma_q->partial_buf[i] = 0; - - dev->vbi_mode.bulk_ctl.urb = kzalloc(sizeof(void *) * num_bufs, - GFP_KERNEL); - if (!dev->vbi_mode.bulk_ctl.urb) { - cx231xx_errdev("cannot alloc memory for usb buffers\n"); - return -ENOMEM; - } - - dev->vbi_mode.bulk_ctl.transfer_buffer = - kzalloc(sizeof(void *) * num_bufs, GFP_KERNEL); - if (!dev->vbi_mode.bulk_ctl.transfer_buffer) { - cx231xx_errdev("cannot allocate memory for usbtransfer\n"); - kfree(dev->vbi_mode.bulk_ctl.urb); - return -ENOMEM; - } - - dev->vbi_mode.bulk_ctl.max_pkt_size = max_pkt_size; - dev->vbi_mode.bulk_ctl.buf = NULL; - - sb_size = max_packets * dev->vbi_mode.bulk_ctl.max_pkt_size; - - /* allocate urbs and transfer buffers */ - for (i = 0; i < dev->vbi_mode.bulk_ctl.num_bufs; i++) { - - urb = usb_alloc_urb(0, GFP_KERNEL); - if (!urb) { - cx231xx_err(DRIVER_NAME - ": cannot alloc bulk_ctl.urb %i\n", i); - cx231xx_uninit_vbi_isoc(dev); - return -ENOMEM; - } - dev->vbi_mode.bulk_ctl.urb[i] = urb; - urb->transfer_flags = 0; - - dev->vbi_mode.bulk_ctl.transfer_buffer[i] = - kzalloc(sb_size, GFP_KERNEL); - if (!dev->vbi_mode.bulk_ctl.transfer_buffer[i]) { - cx231xx_err(DRIVER_NAME - ": unable to allocate %i bytes for transfer" - " buffer %i%s\n", sb_size, i, - in_interrupt() ? " while in int" : ""); - cx231xx_uninit_vbi_isoc(dev); - return -ENOMEM; - } - - pipe = usb_rcvbulkpipe(dev->udev, dev->vbi_mode.end_point_addr); - usb_fill_bulk_urb(urb, dev->udev, pipe, - dev->vbi_mode.bulk_ctl.transfer_buffer[i], - sb_size, cx231xx_irq_vbi_callback, dma_q); - } - - init_waitqueue_head(&dma_q->wq); - - /* submit urbs and enables IRQ */ - for (i = 0; i < dev->vbi_mode.bulk_ctl.num_bufs; i++) { - rc = usb_submit_urb(dev->vbi_mode.bulk_ctl.urb[i], GFP_ATOMIC); - if (rc) { - cx231xx_err(DRIVER_NAME - ": submit of urb %i failed (error=%i)\n", i, - rc); - cx231xx_uninit_vbi_isoc(dev); - return rc; - } - } - - cx231xx_capture_start(dev, 1, Vbi); - - return 0; -} -EXPORT_SYMBOL_GPL(cx231xx_init_vbi_isoc); - -u32 cx231xx_get_vbi_line(struct cx231xx *dev, struct cx231xx_dmaqueue *dma_q, - u8 sav_eav, u8 *p_buffer, u32 buffer_size) -{ - u32 bytes_copied = 0; - int current_field = -1; - - switch (sav_eav) { - - case SAV_VBI_FIELD1: - current_field = 1; - break; - - case SAV_VBI_FIELD2: - current_field = 2; - break; - default: - break; - } - - if (current_field < 0) - return bytes_copied; - - dma_q->last_sav = sav_eav; - - bytes_copied = - cx231xx_copy_vbi_line(dev, dma_q, p_buffer, buffer_size, - current_field); - - return bytes_copied; -} - -/* - * Announces that a buffer were filled and request the next - */ -static inline void vbi_buffer_filled(struct cx231xx *dev, - struct cx231xx_dmaqueue *dma_q, - struct cx231xx_buffer *buf) -{ - /* Advice that buffer was filled */ - /* cx231xx_info(DRIVER_NAME "[%p/%d] wakeup\n", buf, buf->vb.i); */ - - buf->vb.state = VIDEOBUF_DONE; - buf->vb.field_count++; - do_gettimeofday(&buf->vb.ts); - - dev->vbi_mode.bulk_ctl.buf = NULL; - - list_del(&buf->vb.queue); - wake_up(&buf->vb.done); -} - -u32 cx231xx_copy_vbi_line(struct cx231xx *dev, struct cx231xx_dmaqueue *dma_q, - u8 *p_line, u32 length, int field_number) -{ - u32 bytes_to_copy; - struct cx231xx_buffer *buf; - u32 _line_size = dev->width * 2; - - if (dma_q->current_field == -1) { - /* Just starting up */ - cx231xx_reset_vbi_buffer(dev, dma_q); - } - - if (dma_q->current_field != field_number) - dma_q->lines_completed = 0; - - /* get the buffer pointer */ - buf = dev->vbi_mode.bulk_ctl.buf; - - /* Remember the field number for next time */ - dma_q->current_field = field_number; - - bytes_to_copy = dma_q->bytes_left_in_line; - if (bytes_to_copy > length) - bytes_to_copy = length; - - if (dma_q->lines_completed >= dma_q->lines_per_field) { - dma_q->bytes_left_in_line -= bytes_to_copy; - dma_q->is_partial_line = - (dma_q->bytes_left_in_line == 0) ? 0 : 1; - return 0; - } - - dma_q->is_partial_line = 1; - - /* If we don't have a buffer, just return the number of bytes we would - have copied if we had a buffer. */ - if (!buf) { - dma_q->bytes_left_in_line -= bytes_to_copy; - dma_q->is_partial_line = - (dma_q->bytes_left_in_line == 0) ? 0 : 1; - return bytes_to_copy; - } - - /* copy the data to video buffer */ - cx231xx_do_vbi_copy(dev, dma_q, p_line, bytes_to_copy); - - dma_q->pos += bytes_to_copy; - dma_q->bytes_left_in_line -= bytes_to_copy; - - if (dma_q->bytes_left_in_line == 0) { - - dma_q->bytes_left_in_line = _line_size; - dma_q->lines_completed++; - dma_q->is_partial_line = 0; - - if (cx231xx_is_vbi_buffer_done(dev, dma_q) && buf) { - - vbi_buffer_filled(dev, dma_q, buf); - - dma_q->pos = 0; - dma_q->lines_completed = 0; - cx231xx_reset_vbi_buffer(dev, dma_q); - } - } - - return bytes_to_copy; -} - -/* - * video-buf generic routine to get the next available buffer - */ -static inline void get_next_vbi_buf(struct cx231xx_dmaqueue *dma_q, - struct cx231xx_buffer **buf) -{ - struct cx231xx_video_mode *vmode = - container_of(dma_q, struct cx231xx_video_mode, vidq); - struct cx231xx *dev = container_of(vmode, struct cx231xx, vbi_mode); - char *outp; - - if (list_empty(&dma_q->active)) { - cx231xx_err(DRIVER_NAME ": No active queue to serve\n"); - dev->vbi_mode.bulk_ctl.buf = NULL; - *buf = NULL; - return; - } - - /* Get the next buffer */ - *buf = list_entry(dma_q->active.next, struct cx231xx_buffer, vb.queue); - - /* Cleans up buffer - Useful for testing for frame/URB loss */ - outp = videobuf_to_vmalloc(&(*buf)->vb); - memset(outp, 0, (*buf)->vb.size); - - dev->vbi_mode.bulk_ctl.buf = *buf; - - return; -} - -void cx231xx_reset_vbi_buffer(struct cx231xx *dev, - struct cx231xx_dmaqueue *dma_q) -{ - struct cx231xx_buffer *buf; - - buf = dev->vbi_mode.bulk_ctl.buf; - - if (buf == NULL) { - /* first try to get the buffer */ - get_next_vbi_buf(dma_q, &buf); - - dma_q->pos = 0; - dma_q->current_field = -1; - } - - dma_q->bytes_left_in_line = dev->width << 1; - dma_q->lines_completed = 0; -} - -int cx231xx_do_vbi_copy(struct cx231xx *dev, struct cx231xx_dmaqueue *dma_q, - u8 *p_buffer, u32 bytes_to_copy) -{ - u8 *p_out_buffer = NULL; - u32 current_line_bytes_copied = 0; - struct cx231xx_buffer *buf; - u32 _line_size = dev->width << 1; - void *startwrite; - int offset, lencopy; - - buf = dev->vbi_mode.bulk_ctl.buf; - - if (buf == NULL) - return -EINVAL; - - p_out_buffer = videobuf_to_vmalloc(&buf->vb); - - if (dma_q->bytes_left_in_line != _line_size) { - current_line_bytes_copied = - _line_size - dma_q->bytes_left_in_line; - } - - offset = (dma_q->lines_completed * _line_size) + - current_line_bytes_copied; - - if (dma_q->current_field == 2) { - /* Populate the second half of the frame */ - offset += (dev->width * 2 * dma_q->lines_per_field); - } - - /* prepare destination address */ - startwrite = p_out_buffer + offset; - - lencopy = dma_q->bytes_left_in_line > bytes_to_copy ? - bytes_to_copy : dma_q->bytes_left_in_line; - - memcpy(startwrite, p_buffer, lencopy); - - return 0; -} - -u8 cx231xx_is_vbi_buffer_done(struct cx231xx *dev, - struct cx231xx_dmaqueue *dma_q) -{ - u32 height = 0; - - height = ((dev->norm & V4L2_STD_625_50) ? - PAL_VBI_LINES : NTSC_VBI_LINES); - if (dma_q->lines_completed == height && dma_q->current_field == 2) - return 1; - else - return 0; -} |