diff options
Diffstat (limited to 'drivers/media/usb/em28xx/em28xx-video.c')
| -rw-r--r-- | drivers/media/usb/em28xx/em28xx-video.c | 2038 |
1 files changed, 2038 insertions, 0 deletions
diff --git a/drivers/media/usb/em28xx/em28xx-video.c b/drivers/media/usb/em28xx/em28xx-video.c new file mode 100644 index 0000000..51e6ba0 --- /dev/null +++ b/drivers/media/usb/em28xx/em28xx-video.c @@ -0,0 +1,2038 @@ +/* + em28xx-video.c - driver for Empia EM2800/EM2820/2840 USB + video capture devices + + Copyright (C) 2005 Ludovico Cavedon <cavedon@sssup.it> + Markus Rechberger <mrechberger@gmail.com> + Mauro Carvalho Chehab <mchehab@infradead.org> + Sascha Sommer <saschasommer@freenet.de> + Copyright (C) 2012 Frank Schäfer <fschaefer.oss@googlemail.com> + + Some parts based on SN9C10x PC Camera Controllers GPL driver made + by Luca Risolia <luca.risolia@studio.unibo.it> + + 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 "em28xx.h" +#include <media/v4l2-common.h> +#include <media/v4l2-ioctl.h> +#include <media/v4l2-event.h> +#include <media/v4l2-chip-ident.h> +#include <media/msp3400.h> +#include <media/tuner.h> + +#define DRIVER_AUTHOR "Ludovico Cavedon <cavedon@sssup.it>, " \ + "Markus Rechberger <mrechberger@gmail.com>, " \ + "Mauro Carvalho Chehab <mchehab@infradead.org>, " \ + "Sascha Sommer <saschasommer@freenet.de>" + +#define DRIVER_DESC "Empia em28xx based USB video device driver" + +#define EM28XX_VERSION "0.2.0" + +#define em28xx_videodbg(fmt, arg...) do {\ + if (video_debug) \ + printk(KERN_INFO "%s %s :"fmt, \ + dev->name, __func__ , ##arg); } while (0) + +static unsigned int isoc_debug; +module_param(isoc_debug, int, 0644); +MODULE_PARM_DESC(isoc_debug, "enable debug messages [isoc transfers]"); + +#define em28xx_isocdbg(fmt, arg...) \ +do {\ + if (isoc_debug) { \ + printk(KERN_INFO "%s %s :"fmt, \ + dev->name, __func__ , ##arg); \ + } \ + } while (0) + +MODULE_AUTHOR(DRIVER_AUTHOR); +MODULE_DESCRIPTION(DRIVER_DESC); +MODULE_LICENSE("GPL"); +MODULE_VERSION(EM28XX_VERSION); + + +#define EM25XX_FRMDATAHDR_BYTE1 0x02 +#define EM25XX_FRMDATAHDR_BYTE2_STILL_IMAGE 0x20 +#define EM25XX_FRMDATAHDR_BYTE2_FRAME_END 0x02 +#define EM25XX_FRMDATAHDR_BYTE2_FRAME_ID 0x01 +#define EM25XX_FRMDATAHDR_BYTE2_MASK (EM25XX_FRMDATAHDR_BYTE2_STILL_IMAGE | \ + EM25XX_FRMDATAHDR_BYTE2_FRAME_END | \ + EM25XX_FRMDATAHDR_BYTE2_FRAME_ID) + + +static unsigned int video_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = -1U }; +static unsigned int vbi_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = -1U }; +static unsigned int radio_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = -1U }; + +module_param_array(video_nr, int, NULL, 0444); +module_param_array(vbi_nr, int, NULL, 0444); +module_param_array(radio_nr, int, NULL, 0444); +MODULE_PARM_DESC(video_nr, "video device numbers"); +MODULE_PARM_DESC(vbi_nr, "vbi device numbers"); +MODULE_PARM_DESC(radio_nr, "radio device numbers"); + +static unsigned int video_debug; +module_param(video_debug, int, 0644); +MODULE_PARM_DESC(video_debug, "enable debug messages [video]"); + +/* supported video standards */ +static struct em28xx_fmt format[] = { + { + .name = "16 bpp YUY2, 4:2:2, packed", + .fourcc = V4L2_PIX_FMT_YUYV, + .depth = 16, + .reg = EM28XX_OUTFMT_YUV422_Y0UY1V, + }, { + .name = "16 bpp RGB 565, LE", + .fourcc = V4L2_PIX_FMT_RGB565, + .depth = 16, + .reg = EM28XX_OUTFMT_RGB_16_656, + }, { + .name = "8 bpp Bayer BGBG..GRGR", + .fourcc = V4L2_PIX_FMT_SBGGR8, + .depth = 8, + .reg = EM28XX_OUTFMT_RGB_8_BGBG, + }, { + .name = "8 bpp Bayer GRGR..BGBG", + .fourcc = V4L2_PIX_FMT_SGRBG8, + .depth = 8, + .reg = EM28XX_OUTFMT_RGB_8_GRGR, + }, { + .name = "8 bpp Bayer GBGB..RGRG", + .fourcc = V4L2_PIX_FMT_SGBRG8, + .depth = 8, + .reg = EM28XX_OUTFMT_RGB_8_GBGB, + }, { + .name = "12 bpp YUV411", + .fourcc = V4L2_PIX_FMT_YUV411P, + .depth = 12, + .reg = EM28XX_OUTFMT_YUV411, + }, +}; + +/* ------------------------------------------------------------------ + DMA and thread functions + ------------------------------------------------------------------*/ + +/* + * Finish the current buffer + */ +static inline void finish_buffer(struct em28xx *dev, + struct em28xx_buffer *buf) +{ + em28xx_isocdbg("[%p/%d] wakeup\n", buf, buf->top_field); + + buf->vb.v4l2_buf.sequence = dev->field_count++; + buf->vb.v4l2_buf.field = V4L2_FIELD_INTERLACED; + v4l2_get_timestamp(&buf->vb.v4l2_buf.timestamp); + + vb2_buffer_done(&buf->vb, VB2_BUF_STATE_DONE); +} + +/* + * Copy picture data from USB buffer to videobuf buffer + */ +static void em28xx_copy_video(struct em28xx *dev, + struct em28xx_buffer *buf, + unsigned char *usb_buf, + unsigned long len) +{ + void *fieldstart, *startwrite, *startread; + int linesdone, currlinedone, offset, lencopy, remain; + int bytesperline = dev->width << 1; + + if (buf->pos + len > buf->length) + len = buf->length - buf->pos; + + startread = usb_buf; + remain = len; + + if (dev->progressive || buf->top_field) + fieldstart = buf->vb_buf; + else /* interlaced mode, even nr. of lines */ + fieldstart = buf->vb_buf + bytesperline; + + linesdone = buf->pos / bytesperline; + currlinedone = buf->pos % bytesperline; + + if (dev->progressive) + offset = linesdone * bytesperline + currlinedone; + else + offset = linesdone * bytesperline * 2 + currlinedone; + + startwrite = fieldstart + offset; + lencopy = bytesperline - currlinedone; + lencopy = lencopy > remain ? remain : lencopy; + + if ((char *)startwrite + lencopy > (char *)buf->vb_buf + buf->length) { + em28xx_isocdbg("Overflow of %zi bytes past buffer end (1)\n", + ((char *)startwrite + lencopy) - + ((char *)buf->vb_buf + buf->length)); + remain = (char *)buf->vb_buf + buf->length - + (char *)startwrite; + lencopy = remain; + } + if (lencopy <= 0) + return; + memcpy(startwrite, startread, lencopy); + + remain -= lencopy; + + while (remain > 0) { + if (dev->progressive) + startwrite += lencopy; + else + startwrite += lencopy + bytesperline; + startread += lencopy; + if (bytesperline > remain) + lencopy = remain; + else + lencopy = bytesperline; + + if ((char *)startwrite + lencopy > (char *)buf->vb_buf + + buf->length) { + em28xx_isocdbg("Overflow of %zi bytes past buffer end" + "(2)\n", + ((char *)startwrite + lencopy) - + ((char *)buf->vb_buf + buf->length)); + lencopy = remain = (char *)buf->vb_buf + buf->length - + (char *)startwrite; + } + if (lencopy <= 0) + break; + + memcpy(startwrite, startread, lencopy); + + remain -= lencopy; + } + + buf->pos += len; +} + +/* + * Copy VBI data from USB buffer to videobuf buffer + */ +static void em28xx_copy_vbi(struct em28xx *dev, + struct em28xx_buffer *buf, + unsigned char *usb_buf, + unsigned long len) +{ + unsigned int offset; + + if (buf->pos + len > buf->length) + len = buf->length - buf->pos; + + offset = buf->pos; + /* Make sure the bottom field populates the second half of the frame */ + if (buf->top_field == 0) + offset += dev->vbi_width * dev->vbi_height; + + memcpy(buf->vb_buf + offset, usb_buf, len); + buf->pos += len; +} + +static inline void print_err_status(struct em28xx *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) { + em28xx_isocdbg("URB status %d [%s].\n", status, errmsg); + } else { + em28xx_isocdbg("URB packet %d, status %d [%s].\n", + packet, status, errmsg); + } +} + +/* + * get the next available buffer from dma queue + */ +static inline struct em28xx_buffer *get_next_buf(struct em28xx *dev, + struct em28xx_dmaqueue *dma_q) +{ + struct em28xx_buffer *buf; + + if (list_empty(&dma_q->active)) { + em28xx_isocdbg("No active queue to serve\n"); + return NULL; + } + + /* Get the next buffer */ + buf = list_entry(dma_q->active.next, struct em28xx_buffer, list); + /* Cleans up buffer - Useful for testing for frame/URB loss */ + list_del(&buf->list); + buf->pos = 0; + buf->vb_buf = buf->mem; + + return buf; +} + +/* + * Finish the current buffer if completed and prepare for the next field + */ +static struct em28xx_buffer * +finish_field_prepare_next(struct em28xx *dev, + struct em28xx_buffer *buf, + struct em28xx_dmaqueue *dma_q) +{ + if (dev->progressive || dev->top_field) { /* Brand new frame */ + if (buf != NULL) + finish_buffer(dev, buf); + buf = get_next_buf(dev, dma_q); + } + if (buf != NULL) { + buf->top_field = dev->top_field; + buf->pos = 0; + } + + return buf; +} + +/* + * Process data packet according to the em2710/em2750/em28xx frame data format + */ +static inline void process_frame_data_em28xx(struct em28xx *dev, + unsigned char *data_pkt, + unsigned int data_len) +{ + struct em28xx_buffer *buf = dev->usb_ctl.vid_buf; + struct em28xx_buffer *vbi_buf = dev->usb_ctl.vbi_buf; + struct em28xx_dmaqueue *dma_q = &dev->vidq; + struct em28xx_dmaqueue *vbi_dma_q = &dev->vbiq; + + /* capture type 0 = vbi start + capture type 1 = vbi in progress + capture type 2 = video start + capture type 3 = video in progress */ + if (data_len >= 4) { + /* NOTE: Headers are always 4 bytes and + * never split across packets */ + if (data_pkt[0] == 0x88 && data_pkt[1] == 0x88 && + data_pkt[2] == 0x88 && data_pkt[3] == 0x88) { + /* Continuation */ + data_pkt += 4; + data_len -= 4; + } else if (data_pkt[0] == 0x33 && data_pkt[1] == 0x95) { + /* Field start (VBI mode) */ + dev->capture_type = 0; + dev->vbi_read = 0; + em28xx_isocdbg("VBI START HEADER !!!\n"); + dev->top_field = !(data_pkt[2] & 1); + data_pkt += 4; + data_len -= 4; + } else if (data_pkt[0] == 0x22 && data_pkt[1] == 0x5a) { + /* Field start (VBI disabled) */ + dev->capture_type = 2; + em28xx_isocdbg("VIDEO START HEADER !!!\n"); + dev->top_field = !(data_pkt[2] & 1); + data_pkt += 4; + data_len -= 4; + } + } + /* NOTE: With bulk transfers, intermediate data packets + * have no continuation header */ + + if (dev->capture_type == 0) { + vbi_buf = finish_field_prepare_next(dev, vbi_buf, vbi_dma_q); + dev->usb_ctl.vbi_buf = vbi_buf; + dev->capture_type = 1; + } + + if (dev->capture_type == 1) { + int vbi_size = dev->vbi_width * dev->vbi_height; + int vbi_data_len = ((dev->vbi_read + data_len) > vbi_size) ? + (vbi_size - dev->vbi_read) : data_len; + + /* Copy VBI data */ + if (vbi_buf != NULL) + em28xx_copy_vbi(dev, vbi_buf, data_pkt, vbi_data_len); + dev->vbi_read += vbi_data_len; + + if (vbi_data_len < data_len) { + /* Continue with copying video data */ + dev->capture_type = 2; + data_pkt += vbi_data_len; + data_len -= vbi_data_len; + } + } + + if (dev->capture_type == 2) { + buf = finish_field_prepare_next(dev, buf, dma_q); + dev->usb_ctl.vid_buf = buf; + dev->capture_type = 3; + } + + if (dev->capture_type == 3 && buf != NULL && data_len > 0) + em28xx_copy_video(dev, buf, data_pkt, data_len); +} + +/* + * Process data packet according to the em25xx/em276x/7x/8x frame data format + */ +static inline void process_frame_data_em25xx(struct em28xx *dev, + unsigned char *data_pkt, + unsigned int data_len) +{ + struct em28xx_buffer *buf = dev->usb_ctl.vid_buf; + struct em28xx_dmaqueue *dmaq = &dev->vidq; + bool frame_end = 0; + + /* Check for header */ + /* NOTE: at least with bulk transfers, only the first packet + * has a header and has always set the FRAME_END bit */ + if (data_len >= 2) { /* em25xx header is only 2 bytes long */ + if ((data_pkt[0] == EM25XX_FRMDATAHDR_BYTE1) && + ((data_pkt[1] & ~EM25XX_FRMDATAHDR_BYTE2_MASK) == 0x00)) { + dev->top_field = !(data_pkt[1] & + EM25XX_FRMDATAHDR_BYTE2_FRAME_ID); + frame_end = data_pkt[1] & + EM25XX_FRMDATAHDR_BYTE2_FRAME_END; + data_pkt += 2; + data_len -= 2; + } + + /* Finish field and prepare next (BULK only) */ + if (dev->analog_xfer_bulk && frame_end) { + buf = finish_field_prepare_next(dev, buf, dmaq); + dev->usb_ctl.vid_buf = buf; + } + /* NOTE: in ISOC mode when a new frame starts and buf==NULL, + * we COULD already prepare a buffer here to avoid skipping the + * first frame. + */ + } + + /* Copy data */ + if (buf != NULL && data_len > 0) + em28xx_copy_video(dev, buf, data_pkt, data_len); + + /* Finish frame (ISOC only) => avoids lag of 1 frame */ + if (!dev->analog_xfer_bulk && frame_end) { + buf = finish_field_prepare_next(dev, buf, dmaq); + dev->usb_ctl.vid_buf = buf; + } + + /* NOTE: Tested with USB bulk transfers only ! + * The wording in the datasheet suggests that isoc might work different. + * The current code assumes that with isoc transfers each packet has a + * header like with the other em28xx devices. + */ + /* NOTE: Support for interlaced mode is pure theory. It has not been + * tested and it is unknown if these devices actually support it. */ + /* NOTE: No VBI support yet (these chips likely do not support VBI). */ +} + +/* Processes and copies the URB data content (video and VBI data) */ +static inline int em28xx_urb_data_copy(struct em28xx *dev, struct urb *urb) +{ + int xfer_bulk, num_packets, i; + unsigned char *usb_data_pkt; + unsigned int usb_data_len; + + if (!dev) + return 0; + + if (dev->disconnected) + return 0; + + if (urb->status < 0) + print_err_status(dev, -1, urb->status); + + xfer_bulk = usb_pipebulk(urb->pipe); + + if (xfer_bulk) /* bulk */ + num_packets = 1; + else /* isoc */ + num_packets = urb->number_of_packets; + + for (i = 0; i < num_packets; i++) { + if (xfer_bulk) { /* bulk */ + usb_data_len = urb->actual_length; + + usb_data_pkt = urb->transfer_buffer; + } else { /* isoc */ + if (urb->iso_frame_desc[i].status < 0) { + print_err_status(dev, i, + urb->iso_frame_desc[i].status); + if (urb->iso_frame_desc[i].status != -EPROTO) + continue; + } + + usb_data_len = urb->iso_frame_desc[i].actual_length; + if (usb_data_len > dev->max_pkt_size) { + em28xx_isocdbg("packet bigger than packet size"); + continue; + } + + usb_data_pkt = urb->transfer_buffer + + urb->iso_frame_desc[i].offset; + } + + if (usb_data_len == 0) { + /* NOTE: happens very often with isoc transfers */ + /* em28xx_usbdbg("packet %d is empty",i); - spammy */ + continue; + } + + if (dev->is_em25xx) + process_frame_data_em25xx(dev, + usb_data_pkt, usb_data_len); + else + process_frame_data_em28xx(dev, + usb_data_pkt, usb_data_len); + + } + return 1; +} + + +static int get_ressource(enum v4l2_buf_type f_type) +{ + switch (f_type) { + case V4L2_BUF_TYPE_VIDEO_CAPTURE: + return EM28XX_RESOURCE_VIDEO; + case V4L2_BUF_TYPE_VBI_CAPTURE: + return EM28XX_RESOURCE_VBI; + default: + BUG(); + return 0; + } +} + +/* Usage lock check functions */ +static int res_get(struct em28xx *dev, enum v4l2_buf_type f_type) +{ + int res_type = get_ressource(f_type); + + /* is it free? */ + if (dev->resources & res_type) { + /* no, someone else uses it */ + return -EBUSY; + } + + /* it's free, grab it */ + dev->resources |= res_type; + em28xx_videodbg("res: get %d\n", res_type); + return 0; +} + +static void res_free(struct em28xx *dev, enum v4l2_buf_type f_type) +{ + int res_type = get_ressource(f_type); + + dev->resources &= ~res_type; + em28xx_videodbg("res: put %d\n", res_type); +} + +/* ------------------------------------------------------------------ + Videobuf2 operations + ------------------------------------------------------------------*/ + +static int queue_setup(struct vb2_queue *vq, const struct v4l2_format *fmt, + unsigned int *nbuffers, unsigned int *nplanes, + unsigned int sizes[], void *alloc_ctxs[]) +{ + struct em28xx *dev = vb2_get_drv_priv(vq); + unsigned long size; + + if (fmt) + size = fmt->fmt.pix.sizeimage; + else + size = (dev->width * dev->height * dev->format->depth + 7) >> 3; + + if (size == 0) + return -EINVAL; + + if (0 == *nbuffers) + *nbuffers = 32; + + *nplanes = 1; + sizes[0] = size; + + return 0; +} + +static int +buffer_prepare(struct vb2_buffer *vb) +{ + struct em28xx *dev = vb2_get_drv_priv(vb->vb2_queue); + struct em28xx_buffer *buf = container_of(vb, struct em28xx_buffer, vb); + unsigned long size; + + em28xx_videodbg("%s, field=%d\n", __func__, vb->v4l2_buf.field); + + size = (dev->width * dev->height * dev->format->depth + 7) >> 3; + + if (vb2_plane_size(vb, 0) < size) { + em28xx_videodbg("%s data will not fit into plane (%lu < %lu)\n", + __func__, vb2_plane_size(vb, 0), size); + return -EINVAL; + } + vb2_set_plane_payload(&buf->vb, 0, size); + + return 0; +} + +int em28xx_start_analog_streaming(struct vb2_queue *vq, unsigned int count) +{ + struct em28xx *dev = vb2_get_drv_priv(vq); + struct v4l2_frequency f; + int rc = 0; + + em28xx_videodbg("%s\n", __func__); + + /* Make sure streaming is not already in progress for this type + of filehandle (e.g. video, vbi) */ + rc = res_get(dev, vq->type); + if (rc) + return rc; + + if (dev->streaming_users++ == 0) { + /* First active streaming user, so allocate all the URBs */ + + /* Allocate the USB bandwidth */ + em28xx_set_alternate(dev); + + /* Needed, since GPIO might have disabled power of + some i2c device + */ + em28xx_wake_i2c(dev); + + dev->capture_type = -1; + rc = em28xx_init_usb_xfer(dev, EM28XX_ANALOG_MODE, + dev->analog_xfer_bulk, + EM28XX_NUM_BUFS, + dev->max_pkt_size, + dev->packet_multiplier, + em28xx_urb_data_copy); + if (rc < 0) + goto fail; + + /* + * djh: it's not clear whether this code is still needed. I'm + * leaving it in here for now entirely out of concern for + * backward compatibility (the old code did it) + */ + + /* Ask tuner to go to analog or radio mode */ + memset(&f, 0, sizeof(f)); + f.frequency = dev->ctl_freq; + if (vq->owner && vq->owner->vdev->vfl_type == VFL_TYPE_RADIO) + f.type = V4L2_TUNER_RADIO; + else + f.type = V4L2_TUNER_ANALOG_TV; + v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_frequency, &f); + } + +fail: + return rc; +} + +static int em28xx_stop_streaming(struct vb2_queue *vq) +{ + struct em28xx *dev = vb2_get_drv_priv(vq); + struct em28xx_dmaqueue *vidq = &dev->vidq; + unsigned long flags = 0; + + em28xx_videodbg("%s\n", __func__); + + res_free(dev, vq->type); + + if (dev->streaming_users-- == 1) { + /* Last active user, so shutdown all the URBS */ + em28xx_uninit_usb_xfer(dev, EM28XX_ANALOG_MODE); + } + + spin_lock_irqsave(&dev->slock, flags); + while (!list_empty(&vidq->active)) { + struct em28xx_buffer *buf; + buf = list_entry(vidq->active.next, struct em28xx_buffer, list); + list_del(&buf->list); + vb2_buffer_done(&buf->vb, VB2_BUF_STATE_ERROR); + } + dev->usb_ctl.vid_buf = NULL; + spin_unlock_irqrestore(&dev->slock, flags); + + return 0; +} + +int em28xx_stop_vbi_streaming(struct vb2_queue *vq) +{ + struct em28xx *dev = vb2_get_drv_priv(vq); + struct em28xx_dmaqueue *vbiq = &dev->vbiq; + unsigned long flags = 0; + + em28xx_videodbg("%s\n", __func__); + + res_free(dev, vq->type); + + if (dev->streaming_users-- == 1) { + /* Last active user, so shutdown all the URBS */ + em28xx_uninit_usb_xfer(dev, EM28XX_ANALOG_MODE); + } + + spin_lock_irqsave(&dev->slock, flags); + while (!list_empty(&vbiq->active)) { + struct em28xx_buffer *buf; + buf = list_entry(vbiq->active.next, struct em28xx_buffer, list); + list_del(&buf->list); + vb2_buffer_done(&buf->vb, VB2_BUF_STATE_ERROR); + } + dev->usb_ctl.vbi_buf = NULL; + spin_unlock_irqrestore(&dev->slock, flags); + + return 0; +} + +static void +buffer_queue(struct vb2_buffer *vb) +{ + struct em28xx *dev = vb2_get_drv_priv(vb->vb2_queue); + struct em28xx_buffer *buf = container_of(vb, struct em28xx_buffer, vb); + struct em28xx_dmaqueue *vidq = &dev->vidq; + unsigned long flags = 0; + + em28xx_videodbg("%s\n", __func__); + buf->mem = vb2_plane_vaddr(vb, 0); + buf->length = vb2_plane_size(vb, 0); + + spin_lock_irqsave(&dev->slock, flags); + list_add_tail(&buf->list, &vidq->active); + spin_unlock_irqrestore(&dev->slock, flags); +} + +static struct vb2_ops em28xx_video_qops = { + .queue_setup = queue_setup, + .buf_prepare = buffer_prepare, + .buf_queue = buffer_queue, + .start_streaming = em28xx_start_analog_streaming, + .stop_streaming = em28xx_stop_streaming, + .wait_prepare = vb2_ops_wait_prepare, + .wait_finish = vb2_ops_wait_finish, +}; + +int em28xx_vb2_setup(struct em28xx *dev) +{ + int rc; + struct vb2_queue *q; + + /* Setup Videobuf2 for Video capture */ + q = &dev->vb_vidq; + q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; + q->io_modes = VB2_READ | VB2_MMAP | VB2_USERPTR | VB2_DMABUF; + q->timestamp_type = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; + q->drv_priv = dev; + q->buf_struct_size = sizeof(struct em28xx_buffer); + q->ops = &em28xx_video_qops; + q->mem_ops = &vb2_vmalloc_memops; + + rc = vb2_queue_init(q); + if (rc < 0) + return rc; + + /* Setup Videobuf2 for VBI capture */ + q = &dev->vb_vbiq; + q->type = V4L2_BUF_TYPE_VBI_CAPTURE; + q->io_modes = VB2_READ | VB2_MMAP | VB2_USERPTR; + q->timestamp_type = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; + q->drv_priv = dev; + q->buf_struct_size = sizeof(struct em28xx_buffer); + q->ops = &em28xx_vbi_qops; + q->mem_ops = &vb2_vmalloc_memops; + + rc = vb2_queue_init(q); + if (rc < 0) + return rc; + + return 0; +} + +/********************* v4l2 interface **************************************/ + +static void video_mux(struct em28xx *dev, int index) +{ + dev->ctl_input = index; + dev->ctl_ainput = INPUT(index)->amux; + dev->ctl_aoutput = INPUT(index)->aout; + + if (!dev->ctl_aoutput) + dev->ctl_aoutput = EM28XX_AOUT_MASTER; + + v4l2_device_call_all(&dev->v4l2_dev, 0, video, s_routing, + INPUT(index)->vmux, 0, 0); + + if (dev->board.has_msp34xx) { + if (dev->i2s_speed) { + v4l2_device_call_all(&dev->v4l2_dev, 0, audio, + s_i2s_clock_freq, dev->i2s_speed); + } + /* Note: this is msp3400 specific */ + v4l2_device_call_all(&dev->v4l2_dev, 0, audio, s_routing, + dev->ctl_ainput, MSP_OUTPUT(MSP_SC_IN_DSP_SCART1), 0); + } + + if (dev->board.adecoder != EM28XX_NOADECODER) { + v4l2_device_call_all(&dev->v4l2_dev, 0, audio, s_routing, + dev->ctl_ainput, dev->ctl_aoutput, 0); + } + + em28xx_audio_analog_set(dev); +} + +void em28xx_ctrl_notify(struct v4l2_ctrl *ctrl, void *priv) +{ + struct em28xx *dev = priv; + + /* + * In the case of non-AC97 volume controls, we still need + * to do some setups at em28xx, in order to mute/unmute + * and to adjust audio volume. However, the value ranges + * should be checked by the corresponding V4L subdriver. + */ + switch (ctrl->id) { + case V4L2_CID_AUDIO_MUTE: + dev->mute = ctrl->val; + em28xx_audio_analog_set(dev); + break; + case V4L2_CID_AUDIO_VOLUME: + dev->volume = ctrl->val; + em28xx_audio_analog_set(dev); + break; + } +} + +static int em28xx_s_ctrl(struct v4l2_ctrl *ctrl) +{ + struct em28xx *dev = container_of(ctrl->handler, struct em28xx, ctrl_handler); + int ret = -EINVAL; + + switch (ctrl->id) { + case V4L2_CID_AUDIO_MUTE: + dev->mute = ctrl->val; + ret = em28xx_audio_analog_set(dev); + break; + case V4L2_CID_AUDIO_VOLUME: + dev->volume = ctrl->val; + ret = em28xx_audio_analog_set(dev); + break; + case V4L2_CID_CONTRAST: + ret = em28xx_write_reg(dev, EM28XX_R20_YGAIN, ctrl->val); + break; + case V4L2_CID_BRIGHTNESS: + ret = em28xx_write_reg(dev, EM28XX_R21_YOFFSET, ctrl->val); + break; + case V4L2_CID_SATURATION: + ret = em28xx_write_reg(dev, EM28XX_R22_UVGAIN, ctrl->val); + break; + case V4L2_CID_BLUE_BALANCE: + ret = em28xx_write_reg(dev, EM28XX_R23_UOFFSET, ctrl->val); + break; + case V4L2_CID_RED_BALANCE: + ret = em28xx_write_reg(dev, EM28XX_R24_VOFFSET, ctrl->val); + break; + case V4L2_CID_SHARPNESS: + ret = em28xx_write_reg(dev, EM28XX_R25_SHARPNESS, ctrl->val); + break; + } + + return (ret < 0) ? ret : 0; +} + +const struct v4l2_ctrl_ops em28xx_ctrl_ops = { + .s_ctrl = em28xx_s_ctrl, +}; + +static void size_to_scale(struct em28xx *dev, + unsigned int width, unsigned int height, + unsigned int *hscale, unsigned int *vscale) +{ + unsigned int maxw = norm_maxw(dev); + unsigned int maxh = norm_maxh(dev); + + *hscale = (((unsigned long)maxw) << 12) / width - 4096L; + if (*hscale > EM28XX_HVSCALE_MAX) + *hscale = EM28XX_HVSCALE_MAX; + + *vscale = (((unsigned long)maxh) << 12) / height - 4096L; + if (*vscale > EM28XX_HVSCALE_MAX) + *vscale = EM28XX_HVSCALE_MAX; +} + +static void scale_to_size(struct em28xx *dev, + unsigned int hscale, unsigned int vscale, + unsigned int *width, unsigned int *height) +{ + unsigned int maxw = norm_maxw(dev); + unsigned int maxh = norm_maxh(dev); + + *width = (((unsigned long)maxw) << 12) / (hscale + 4096L); + *height = (((unsigned long)maxh) << 12) / (vscale + 4096L); +} + +/* ------------------------------------------------------------------ + IOCTL vidioc handling + ------------------------------------------------------------------*/ + +static int vidioc_g_fmt_vid_cap(struct file *file, void *priv, + struct v4l2_format *f) +{ + struct em28xx_fh *fh = priv; + struct em28xx *dev = fh->dev; + + f->fmt.pix.width = dev->width; + f->fmt.pix.height = dev->height; + f->fmt.pix.pixelformat = dev->format->fourcc; + f->fmt.pix.bytesperline = (dev->width * dev->format->depth + 7) >> 3; + f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * dev->height; + f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M; + + /* FIXME: TOP? NONE? BOTTOM? ALTENATE? */ + if (dev->progressive) + f->fmt.pix.field = V4L2_FIELD_NONE; + else + f->fmt.pix.field = dev->interlaced ? + V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP; + return 0; +} + +static struct em28xx_fmt *format_by_fourcc(unsigned int fourcc) +{ + unsigned int i; + + for (i = 0; i < ARRAY_SIZE(format); i++) + if (format[i].fourcc == fourcc) + return &format[i]; + + return NULL; +} + +static int vidioc_try_fmt_vid_cap(struct file *file, void *priv, + struct v4l2_format *f) +{ + struct em28xx_fh *fh = priv; + struct em28xx *dev = fh->dev; + unsigned int width = f->fmt.pix.width; + unsigned int height = f->fmt.pix.height; + unsigned int maxw = norm_maxw(dev); + unsigned int maxh = norm_maxh(dev); + unsigned int hscale, vscale; + struct em28xx_fmt *fmt; + + fmt = format_by_fourcc(f->fmt.pix.pixelformat); + if (!fmt) { + em28xx_videodbg("Fourcc format (%08x) invalid.\n", + f->fmt.pix.pixelformat); + return -EINVAL; + } + + if (dev->board.is_em2800) { + /* the em2800 can only scale down to 50% */ + height = height > (3 * maxh / 4) ? maxh : maxh / 2; + width = width > (3 * maxw / 4) ? maxw : maxw / 2; + /* + * MaxPacketSize for em2800 is too small to capture at full + * resolution use half of maxw as the scaler can only scale + * to 50% + */ + if (width == maxw && height == maxh) + width /= 2; + } else { + /* width must even because of the YUYV format + height must be even because of interlacing */ + v4l_bound_align_image(&width, 48, maxw, 1, &height, 32, maxh, + 1, 0); + } + + size_to_scale(dev, width, height, &hscale, &vscale); + scale_to_size(dev, hscale, vscale, &width, &height); + + f->fmt.pix.width = width; + f->fmt.pix.height = height; + f->fmt.pix.pixelformat = fmt->fourcc; + f->fmt.pix.bytesperline = (width * fmt->depth + 7) >> 3; + f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * height; + f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M; + if (dev->progressive) + f->fmt.pix.field = V4L2_FIELD_NONE; + else + f->fmt.pix.field = dev->interlaced ? + V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP; + + return 0; +} + +static int em28xx_set_video_format(struct em28xx *dev, unsigned int fourcc, + unsigned width, unsigned height) +{ + struct em28xx_fmt *fmt; + + fmt = format_by_fourcc(fourcc); + if (!fmt) + return -EINVAL; + + dev->format = fmt; + dev->width = width; + dev->height = height; + + /* set new image size */ + size_to_scale(dev, dev->width, dev->height, &dev->hscale, &dev->vscale); + + em28xx_resolution_set(dev); + + return 0; +} + +static int vidioc_s_fmt_vid_cap(struct file *file, void *priv, + struct v4l2_format *f) +{ + struct em28xx *dev = video_drvdata(file); + + if (dev->streaming_users > 0) + return -EBUSY; + + vidioc_try_fmt_vid_cap(file, priv, f); + + return em28xx_set_video_format(dev, f->fmt.pix.pixelformat, + f->fmt.pix.width, f->fmt.pix.height); +} + +static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *norm) +{ + struct em28xx_fh *fh = priv; + struct em28xx *dev = fh->dev; + + *norm = dev->norm; + + return 0; +} + +static int vidioc_querystd(struct file *file, void *priv, v4l2_std_id *norm) +{ + struct em28xx_fh *fh = priv; + struct em28xx *dev = fh->dev; + + v4l2_device_call_all(&dev->v4l2_dev, 0, video, querystd, norm); + + return 0; +} + +static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id norm) +{ + struct em28xx_fh *fh = priv; + struct em28xx *dev = fh->dev; + struct v4l2_format f; + + if (norm == dev->norm) + return 0; + + if (dev->streaming_users > 0) + return -EBUSY; + + dev->norm = norm; + + /* Adjusts width/height, if needed */ + f.fmt.pix.width = 720; + f.fmt.pix.height = (norm & V4L2_STD_525_60) ? 480 : 576; + vidioc_try_fmt_vid_cap(file, priv, &f); + + /* set new image size */ + dev->width = f.fmt.pix.width; + dev->height = f.fmt.pix.height; + size_to_scale(dev, dev->width, dev->height, &dev->hscale, &dev->vscale); + + em28xx_resolution_set(dev); + v4l2_device_call_all(&dev->v4l2_dev, 0, core, s_std, dev->norm); + + return 0; +} + +static int vidioc_g_parm(struct file *file, void *priv, + struct v4l2_streamparm *p) +{ + struct em28xx_fh *fh = priv; + struct em28xx *dev = fh->dev; + int rc = 0; + + p->parm.capture.readbuffers = EM28XX_MIN_BUF; + if (dev->board.is_webcam) + rc = v4l2_device_call_until_err(&dev->v4l2_dev, 0, + video, g_parm, p); + else + v4l2_video_std_frame_period(dev->norm, + &p->parm.capture.timeperframe); + + return rc; +} + +static int vidioc_s_parm(struct file *file, void *priv, + struct v4l2_streamparm *p) +{ + struct em28xx_fh *fh = priv; + struct em28xx *dev = fh->dev; + + p->parm.capture.readbuffers = EM28XX_MIN_BUF; + return v4l2_device_call_until_err(&dev->v4l2_dev, 0, video, s_parm, p); +} + +static const char *iname[] = { + [EM28XX_VMUX_COMPOSITE1] = "Composite1", + [EM28XX_VMUX_COMPOSITE2] = "Composite2", + [EM28XX_VMUX_COMPOSITE3] = "Composite3", + [EM28XX_VMUX_COMPOSITE4] = "Composite4", + [EM28XX_VMUX_SVIDEO] = "S-Video", + [EM28XX_VMUX_TELEVISION] = "Television", + [EM28XX_VMUX_CABLE] = "Cable TV", + [EM28XX_VMUX_DVB] = "DVB", + [EM28XX_VMUX_DEBUG] = "for debug only", +}; + +static int vidioc_enum_input(struct file *file, void *priv, + struct v4l2_input *i) +{ + struct em28xx_fh *fh = priv; + struct em28xx *dev = fh->dev; + unsigned int n; + + n = i->index; + if (n >= MAX_EM28XX_INPUT) + return -EINVAL; + if (0 == INPUT(n)->type) + return -EINVAL; + + i->index = n; + i->type = V4L2_INPUT_TYPE_CAMERA; + + strcpy(i->name, iname[INPUT(n)->type]); + + if ((EM28XX_VMUX_TELEVISION == INPUT(n)->type) || + (EM28XX_VMUX_CABLE == INPUT(n)->type)) + i->type = V4L2_INPUT_TYPE_TUNER; + + i->std = dev->vdev->tvnorms; + /* webcams do not have the STD API */ + if (dev->board.is_webcam) + i->capabilities = 0; + + return 0; +} + +static int vidioc_g_input(struct file *file, void *priv, unsigned int *i) +{ + struct em28xx_fh *fh = priv; + struct em28xx *dev = fh->dev; + + *i = dev->ctl_input; + + return 0; +} + +static int vidioc_s_input(struct file *file, void *priv, unsigned int i) +{ + struct em28xx_fh *fh = priv; + struct em28xx *dev = fh->dev; + + if (i >= MAX_EM28XX_INPUT) + return -EINVAL; + if (0 == INPUT(i)->type) + return -EINVAL; + + video_mux(dev, i); + return 0; +} + +static int vidioc_g_audio(struct file *file, void *priv, struct v4l2_audio *a) +{ + struct em28xx_fh *fh = priv; + struct em28xx *dev = fh->dev; + + switch (a->index) { + case EM28XX_AMUX_VIDEO: + strcpy(a->name, "Television"); + break; + case EM28XX_AMUX_LINE_IN: + strcpy(a->name, "Line In"); + break; + case EM28XX_AMUX_VIDEO2: + strcpy(a->name, "Television alt"); + break; + case EM28XX_AMUX_PHONE: + strcpy(a->name, "Phone"); + break; + case EM28XX_AMUX_MIC: + strcpy(a->name, "Mic"); + break; + case EM28XX_AMUX_CD: + strcpy(a->name, "CD"); + break; + case EM28XX_AMUX_AUX: + strcpy(a->name, "Aux"); + break; + case EM28XX_AMUX_PCM_OUT: + strcpy(a->name, "PCM"); + break; + default: + return -EINVAL; + } + + a->index = dev->ctl_ainput; + a->capability = V4L2_AUDCAP_STEREO; + + return 0; +} + +static int vidioc_s_audio(struct file *file, void *priv, const struct v4l2_audio *a) +{ + struct em28xx_fh *fh = priv; + struct em28xx *dev = fh->dev; + + if (a->index >= MAX_EM28XX_INPUT) + return -EINVAL; + if (0 == INPUT(a->index)->type) + return -EINVAL; + + dev->ctl_ainput = INPUT(a->index)->amux; + dev->ctl_aoutput = INPUT(a->index)->aout; + + if (!dev->ctl_aoutput) + dev->ctl_aoutput = EM28XX_AOUT_MASTER; + + return 0; +} + +static int vidioc_g_tuner(struct file *file, void *priv, + struct v4l2_tuner *t) +{ + struct em28xx_fh *fh = priv; + struct em28xx *dev = fh->dev; + + if (0 != t->index) + return -EINVAL; + + strcpy(t->name, "Tuner"); + + v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, g_tuner, t); + return 0; +} + +static int vidioc_s_tuner(struct file *file, void *priv, + const struct v4l2_tuner *t) +{ + struct em28xx_fh *fh = priv; + struct em28xx *dev = fh->dev; + + if (0 != t->index) + return -EINVAL; + + v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_tuner, t); + return 0; +} + +static int vidioc_g_frequency(struct file *file, void *priv, + struct v4l2_frequency *f) +{ + struct em28xx_fh *fh = priv; + struct em28xx *dev = fh->dev; + + if (0 != f->tuner) + return -EINVAL; + + f->frequency = dev->ctl_freq; + return 0; +} + +static int vidioc_s_frequency(struct file *file, void *priv, + const struct v4l2_frequency *f) +{ + struct v4l2_frequency new_freq = *f; + struct em28xx_fh *fh = priv; + struct em28xx *dev = fh->dev; + + if (0 != f->tuner) + return -EINVAL; + + v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_frequency, f); + v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, g_frequency, &new_freq); + dev->ctl_freq = new_freq.frequency; + + return 0; +} + +static int vidioc_g_chip_ident(struct file *file, void *priv, + struct v4l2_dbg_chip_ident *chip) +{ + struct em28xx_fh *fh = priv; + struct em28xx *dev = fh->dev; + + chip->ident = V4L2_IDENT_NONE; + chip->revision = 0; + if (chip->match.type == V4L2_CHIP_MATCH_BRIDGE) { + if (chip->match.addr > 1) + return -EINVAL; + return 0; + } + if (chip->match.type != V4L2_CHIP_MATCH_I2C_DRIVER && + chip->match.type != V4L2_CHIP_MATCH_I2C_ADDR) + return -EINVAL; + + v4l2_device_call_all(&dev->v4l2_dev, 0, core, g_chip_ident, chip); + + return 0; +} + +#ifdef CPTCFG_VIDEO_ADV_DEBUG +static int vidioc_g_chip_info(struct file *file, void *priv, + struct v4l2_dbg_chip_info *chip) +{ + struct em28xx_fh *fh = priv; + struct em28xx *dev = fh->dev; + + if (chip->match.addr > 1) + return -EINVAL; + if (chip->match.addr == 1) + strlcpy(chip->name, "ac97", sizeof(chip->name)); + else + strlcpy(chip->name, dev->v4l2_dev.name, sizeof(chip->name)); + return 0; +} + +static int em28xx_reg_len(int reg) +{ + switch (reg) { + case EM28XX_R40_AC97LSB: + case EM28XX_R30_HSCALELOW: + case EM28XX_R32_VSCALELOW: + return 2; + default: + return 1; + } +} + +static int vidioc_g_register(struct file *file, void *priv, + struct v4l2_dbg_register *reg) +{ + struct em28xx_fh *fh = priv; + struct em28xx *dev = fh->dev; + int ret; + + switch (reg->match.type) { + case V4L2_CHIP_MATCH_BRIDGE: + if (reg->match.addr > 1) + return -EINVAL; + if (!reg->match.addr) + break; + /* fall-through */ + case V4L2_CHIP_MATCH_AC97: + ret = em28xx_read_ac97(dev, reg->reg); + if (ret < 0) + return ret; + + reg->val = ret; + reg->size = 1; + return 0; + case V4L2_CHIP_MATCH_I2C_DRIVER: + v4l2_device_call_all(&dev->v4l2_dev, 0, core, g_register, reg); + return 0; + case V4L2_CHIP_MATCH_I2C_ADDR: + /* TODO: is this correct? */ + v4l2_device_call_all(&dev->v4l2_dev, 0, core, g_register, reg); + return 0; + default: + return -EINVAL; + } + + /* Match host */ + reg->size = em28xx_reg_len(reg->reg); + if (reg->size == 1) { + ret = em28xx_read_reg(dev, reg->reg); + + if (ret < 0) + return ret; + + reg->val = ret; + } else { + __le16 val = 0; + ret = em28xx_read_reg_req_len(dev, USB_REQ_GET_STATUS, + reg->reg, (char *)&val, 2); + if (ret < 0) + return ret; + + reg->val = le16_to_cpu(val); + } + + return 0; +} + +static int vidioc_s_register(struct file *file, void *priv, + const struct v4l2_dbg_register *reg) +{ + struct em28xx_fh *fh = priv; + struct em28xx *dev = fh->dev; + __le16 buf; + + switch (reg->match.type) { + case V4L2_CHIP_MATCH_BRIDGE: + if (reg->match.addr > 1) + return -EINVAL; + if (!reg->match.addr) + break; + /* fall-through */ + case V4L2_CHIP_MATCH_AC97: + return em28xx_write_ac97(dev, reg->reg, reg->val); + case V4L2_CHIP_MATCH_I2C_DRIVER: + v4l2_device_call_all(&dev->v4l2_dev, 0, core, s_register, reg); + return 0; + case V4L2_CHIP_MATCH_I2C_ADDR: + /* TODO: is this correct? */ + v4l2_device_call_all(&dev->v4l2_dev, 0, core, s_register, reg); + return 0; + default: + return -EINVAL; + } + + /* Match host */ + buf = cpu_to_le16(reg->val); + + return em28xx_write_regs(dev, reg->reg, (char *)&buf, + em28xx_reg_len(reg->reg)); +} +#endif + + +static int vidioc_querycap(struct file *file, void *priv, + struct v4l2_capability *cap) +{ + struct video_device *vdev = video_devdata(file); + struct em28xx_fh *fh = priv; + struct em28xx *dev = fh->dev; + + strlcpy(cap->driver, "em28xx", sizeof(cap->driver)); + strlcpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card)); + usb_make_path(dev->udev, cap->bus_info, sizeof(cap->bus_info)); + + if (vdev->vfl_type == VFL_TYPE_GRABBER) + cap->device_caps = V4L2_CAP_READWRITE | + V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING; + else if (vdev->vfl_type == VFL_TYPE_RADIO) + cap->device_caps = V4L2_CAP_RADIO; + else + cap->device_caps = V4L2_CAP_READWRITE | V4L2_CAP_VBI_CAPTURE; + + if (dev->audio_mode.has_audio) + cap->device_caps |= V4L2_CAP_AUDIO; + + if (dev->tuner_type != TUNER_ABSENT) + cap->device_caps |= V4L2_CAP_TUNER; + + cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS | + V4L2_CAP_READWRITE | V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING; + if (dev->vbi_dev) + cap->capabilities |= V4L2_CAP_VBI_CAPTURE; + if (dev->radio_dev) + cap->capabilities |= V4L2_CAP_RADIO; + return 0; +} + +static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv, + struct v4l2_fmtdesc *f) +{ + if (unlikely(f->index >= ARRAY_SIZE(format))) + return -EINVAL; + + strlcpy(f->description, format[f->index].name, sizeof(f->description)); + f->pixelformat = format[f->index].fourcc; + + return 0; +} + +static int vidioc_enum_framesizes(struct file *file, void *priv, + struct v4l2_frmsizeenum *fsize) +{ + struct em28xx_fh *fh = priv; + struct em28xx *dev = fh->dev; + struct em28xx_fmt *fmt; + unsigned int maxw = norm_maxw(dev); + unsigned int maxh = norm_maxh(dev); + + fmt = format_by_fourcc(fsize->pixel_format); + if (!fmt) { + em28xx_videodbg("Fourcc format (%08x) invalid.\n", + fsize->pixel_format); + return -EINVAL; + } + + if (dev->board.is_em2800) { + if (fsize->index > 1) + return -EINVAL; + fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE; + fsize->discrete.width = maxw / (1 + fsize->index); + fsize->discrete.height = maxh / (1 + fsize->index); + return 0; + } + + if (fsize->index != 0) + return -EINVAL; + + /* Report a continuous range */ + fsize->type = V4L2_FRMSIZE_TYPE_STEPWISE; + scale_to_size(dev, EM28XX_HVSCALE_MAX, EM28XX_HVSCALE_MAX, + &fsize->stepwise.min_width, &fsize->stepwise.min_height); + if (fsize->stepwise.min_width < 48) + fsize->stepwise.min_width = 48; + if (fsize->stepwise.min_height < 38) + fsize->stepwise.min_height = 38; + fsize->stepwise.max_width = maxw; + fsize->stepwise.max_height = maxh; + fsize->stepwise.step_width = 1; + fsize->stepwise.step_height = 1; + return 0; +} + +/* RAW VBI ioctls */ + +static int vidioc_g_fmt_vbi_cap(struct file *file, void *priv, + struct v4l2_format *format) +{ + struct em28xx_fh *fh = priv; + struct em28xx *dev = fh->dev; + + format->fmt.vbi.samples_per_line = dev->vbi_width; + format->fmt.vbi.sample_format = V4L2_PIX_FMT_GREY; + format->fmt.vbi.offset = 0; + format->fmt.vbi.flags = 0; + format->fmt.vbi.sampling_rate = 6750000 * 4 / 2; + format->fmt.vbi.count[0] = dev->vbi_height; + format->fmt.vbi.count[1] = dev->vbi_height; + memset(format->fmt.vbi.reserved, 0, sizeof(format->fmt.vbi.reserved)); + + /* Varies by video standard (NTSC, PAL, etc.) */ + if (dev->norm & V4L2_STD_525_60) { + /* NTSC */ + format->fmt.vbi.start[0] = 10; + format->fmt.vbi.start[1] = 273; + } else if (dev->norm & V4L2_STD_625_50) { + /* PAL */ + format->fmt.vbi.start[0] = 6; + format->fmt.vbi.start[1] = 318; + } + + return 0; +} + +/* ----------------------------------------------------------- */ +/* RADIO ESPECIFIC IOCTLS */ +/* ----------------------------------------------------------- */ + +static int radio_g_tuner(struct file *file, void *priv, + struct v4l2_tuner *t) +{ + struct em28xx *dev = ((struct em28xx_fh *)priv)->dev; + + if (unlikely(t->index > 0)) + return -EINVAL; + + strcpy(t->name, "Radio"); + + v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, g_tuner, t); + + return 0; +} + +static int radio_s_tuner(struct file *file, void *priv, + const struct v4l2_tuner *t) +{ + struct em28xx *dev = ((struct em28xx_fh *)priv)->dev; + + if (0 != t->index) + return -EINVAL; + + v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_tuner, t); + + return 0; +} + +/* + * em28xx_v4l2_open() + * inits the device and starts isoc transfer + */ +static int em28xx_v4l2_open(struct file *filp) +{ + struct video_device *vdev = video_devdata(filp); + struct em28xx *dev = video_drvdata(filp); + enum v4l2_buf_type fh_type = 0; + struct em28xx_fh *fh; + + switch (vdev->vfl_type) { + case VFL_TYPE_GRABBER: + fh_type = V4L2_BUF_TYPE_VIDEO_CAPTURE; + break; + case VFL_TYPE_VBI: + fh_type = V4L2_BUF_TYPE_VBI_CAPTURE; + break; + } + + em28xx_videodbg("open dev=%s type=%s users=%d\n", + video_device_node_name(vdev), v4l2_type_names[fh_type], + dev->users); + + + if (mutex_lock_interruptible(&dev->lock)) + return -ERESTARTSYS; + fh = kzalloc(sizeof(struct em28xx_fh), GFP_KERNEL); + if (!fh) { + em28xx_errdev("em28xx-video.c: Out of memory?!\n"); + mutex_unlock(&dev->lock); + return -ENOMEM; + } + v4l2_fh_init(&fh->fh, vdev); + fh->dev = dev; + fh->type = fh_type; + filp->private_data = fh; + + if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE && dev->users == 0) { + em28xx_set_mode(dev, EM28XX_ANALOG_MODE); + em28xx_resolution_set(dev); + + /* Needed, since GPIO might have disabled power of + some i2c device + */ + em28xx_wake_i2c(dev); + + } + + if (vdev->vfl_type == VFL_TYPE_RADIO) { + em28xx_videodbg("video_open: setting radio device\n"); + v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_radio); + } + + dev->users++; + + mutex_unlock(&dev->lock); + v4l2_fh_add(&fh->fh); + + return 0; +} + +/* + * em28xx_realease_resources() + * unregisters the v4l2,i2c and usb devices + * called when the device gets disconected or at module unload +*/ +void em28xx_release_analog_resources(struct em28xx *dev) +{ + + /*FIXME: I2C IR should be disconnected */ + + if (dev->radio_dev) { + if (video_is_registered(dev->radio_dev)) + video_unregister_device(dev->radio_dev); + else + video_device_release(dev->radio_dev); + dev->radio_dev = NULL; + } + if (dev->vbi_dev) { + em28xx_info("V4L2 device %s deregistered\n", + video_device_node_name(dev->vbi_dev)); + if (video_is_registered(dev->vbi_dev)) + video_unregister_device(dev->vbi_dev); + else + video_device_release(dev->vbi_dev); + dev->vbi_dev = NULL; + } + if (dev->vdev) { + em28xx_info("V4L2 device %s deregistered\n", + video_device_node_name(dev->vdev)); + if (video_is_registered(dev->vdev)) + video_unregister_device(dev->vdev); + else + video_device_release(dev->vdev); + dev->vdev = NULL; + } +} + +/* + * em28xx_v4l2_close() + * stops streaming and deallocates all resources allocated by the v4l2 + * calls and ioctls + */ +static int em28xx_v4l2_close(struct file *filp) +{ + struct em28xx_fh *fh = filp->private_data; + struct em28xx *dev = fh->dev; + int errCode; + + em28xx_videodbg("users=%d\n", dev->users); + + mutex_lock(&dev->lock); + vb2_fop_release(filp); + + if (dev->users == 1) { + /* the device is already disconnect, + free the remaining resources */ + if (dev->disconnected) { + em28xx_release_resources(dev); + kfree(dev->alt_max_pkt_size_isoc); + mutex_unlock(&dev->lock); + kfree(dev); + return 0; + } + + /* Save some power by putting tuner to sleep */ + v4l2_device_call_all(&dev->v4l2_dev, 0, core, s_power, 0); + + /* do this before setting alternate! */ + em28xx_set_mode(dev, EM28XX_SUSPEND); + + /* set alternate 0 */ + dev->alt = 0; + em28xx_videodbg("setting alternate 0\n"); + errCode = usb_set_interface(dev->udev, 0, 0); + if (errCode < 0) { + em28xx_errdev("cannot change alternate number to " + "0 (error=%i)\n", errCode); + } + } + + dev->users--; + mutex_unlock(&dev->lock); + return 0; +} + +static const struct v4l2_file_operations em28xx_v4l_fops = { + .owner = THIS_MODULE, + .open = em28xx_v4l2_open, + .release = em28xx_v4l2_close, + .read = vb2_fop_read, + .poll = vb2_fop_poll, + .mmap = vb2_fop_mmap, + .unlocked_ioctl = video_ioctl2, +}; + +static const struct v4l2_ioctl_ops video_ioctl_ops = { + .vidioc_querycap = vidioc_querycap, + .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap, + .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap, + .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap, + .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap, + .vidioc_g_fmt_vbi_cap = vidioc_g_fmt_vbi_cap, + .vidioc_try_fmt_vbi_cap = vidioc_g_fmt_vbi_cap, + .vidioc_s_fmt_vbi_cap = vidioc_g_fmt_vbi_cap, + .vidioc_enum_framesizes = vidioc_enum_framesizes, + .vidioc_g_audio = vidioc_g_audio, + .vidioc_s_audio = vidioc_s_audio, + + .vidioc_reqbufs = vb2_ioctl_reqbufs, + .vidioc_create_bufs = vb2_ioctl_create_bufs, + .vidioc_prepare_buf = vb2_ioctl_prepare_buf, + .vidioc_querybuf = vb2_ioctl_querybuf, + .vidioc_qbuf = vb2_ioctl_qbuf, + .vidioc_dqbuf = vb2_ioctl_dqbuf, + + .vidioc_g_std = vidioc_g_std, + .vidioc_querystd = vidioc_querystd, + .vidioc_s_std = vidioc_s_std, + .vidioc_g_parm = vidioc_g_parm, + .vidioc_s_parm = vidioc_s_parm, + .vidioc_enum_input = vidioc_enum_input, + .vidioc_g_input = vidioc_g_input, + .vidioc_s_input = vidioc_s_input, + .vidioc_streamon = vb2_ioctl_streamon, + .vidioc_streamoff = vb2_ioctl_streamoff, + .vidioc_g_tuner = vidioc_g_tuner, + .vidioc_s_tuner = vidioc_s_tuner, + .vidioc_g_frequency = vidioc_g_frequency, + .vidioc_s_frequency = vidioc_s_frequency, + .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, + .vidioc_unsubscribe_event = v4l2_event_unsubscribe, + .vidioc_g_chip_ident = vidioc_g_chip_ident, +#ifdef CPTCFG_VIDEO_ADV_DEBUG + .vidioc_g_chip_info = vidioc_g_chip_info, + .vidioc_g_register = vidioc_g_register, + .vidioc_s_register = vidioc_s_register, +#endif +}; + +static const struct video_device em28xx_video_template = { + .fops = &em28xx_v4l_fops, + .release = video_device_release_empty, + .ioctl_ops = &video_ioctl_ops, + + .tvnorms = V4L2_STD_ALL, +}; + +static const struct v4l2_file_operations radio_fops = { + .owner = THIS_MODULE, + .open = em28xx_v4l2_open, + .release = em28xx_v4l2_close, + .unlocked_ioctl = video_ioctl2, +}; + +static const struct v4l2_ioctl_ops radio_ioctl_ops = { + .vidioc_querycap = vidioc_querycap, + .vidioc_g_tuner = radio_g_tuner, + .vidioc_s_tuner = radio_s_tuner, + .vidioc_g_frequency = vidioc_g_frequency, + .vidioc_s_frequency = vidioc_s_frequency, + .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, + .vidioc_unsubscribe_event = v4l2_event_unsubscribe, + .vidioc_g_chip_ident = vidioc_g_chip_ident, +#ifdef CPTCFG_VIDEO_ADV_DEBUG + .vidioc_g_chip_info = vidioc_g_chip_info, + .vidioc_g_register = vidioc_g_register, + .vidioc_s_register = vidioc_s_register, +#endif +}; + +static struct video_device em28xx_radio_template = { + .name = "em28xx-radio", + .fops = &radio_fops, + .ioctl_ops = &radio_ioctl_ops, +}; + +/******************************** usb interface ******************************/ + + + +static struct video_device *em28xx_vdev_init(struct em28xx *dev, + const struct video_device *template, + const char *type_name) +{ + struct video_device *vfd; + + vfd = video_device_alloc(); + if (NULL == vfd) + return NULL; + + *vfd = *template; + vfd->v4l2_dev = &dev->v4l2_dev; + vfd->debug = video_debug; + vfd->lock = &dev->lock; + set_bit(V4L2_FL_USE_FH_PRIO, &vfd->flags); + if (dev->board.is_webcam) + vfd->tvnorms = 0; + + snprintf(vfd->name, sizeof(vfd->name), "%s %s", + dev->name, type_name); + + video_set_drvdata(vfd, dev); + return vfd; +} + +int em28xx_register_analog_devices(struct em28xx *dev) +{ + u8 val; + int ret; + unsigned int maxw; + + printk(KERN_INFO "%s: v4l2 driver version %s\n", + dev->name, EM28XX_VERSION); + + /* set default norm */ + dev->norm = V4L2_STD_PAL; + v4l2_device_call_all(&dev->v4l2_dev, 0, core, s_std, dev->norm); + dev->interlaced = EM28XX_INTERLACED_DEFAULT; + + /* Analog specific initialization */ + dev->format = &format[0]; + + maxw = norm_maxw(dev); + /* MaxPacketSize for em2800 is too small to capture at full resolution + * use half of maxw as the scaler can only scale to 50% */ + if (dev->board.is_em2800) + maxw /= 2; + + em28xx_set_video_format(dev, format[0].fourcc, + maxw, norm_maxh(dev)); + + video_mux(dev, 0); + + /* Audio defaults */ + dev->mute = 1; + dev->volume = 0x1f; + +/* em28xx_write_reg(dev, EM28XX_R0E_AUDIOSRC, 0xc0); audio register */ + val = (u8)em28xx_read_reg(dev, EM28XX_R0F_XCLK); + em28xx_write_reg(dev, EM28XX_R0F_XCLK, + (EM28XX_XCLK_AUDIO_UNMUTE | val)); + + em28xx_set_outfmt(dev); + em28xx_compression_disable(dev); + + /* Add image controls */ + /* NOTE: at this point, the subdevices are already registered, so bridge + * controls are only added/enabled when no subdevice provides them */ + if (NULL == v4l2_ctrl_find(&dev->ctrl_handler, V4L2_CID_CONTRAST)) + v4l2_ctrl_new_std(&dev->ctrl_handler, &em28xx_ctrl_ops, + V4L2_CID_CONTRAST, + 0, 0x1f, 1, CONTRAST_DEFAULT); + if (NULL == v4l2_ctrl_find(&dev->ctrl_handler, V4L2_CID_BRIGHTNESS)) + v4l2_ctrl_new_std(&dev->ctrl_handler, &em28xx_ctrl_ops, + V4L2_CID_BRIGHTNESS, + -0x80, 0x7f, 1, BRIGHTNESS_DEFAULT); + if (NULL == v4l2_ctrl_find(&dev->ctrl_handler, V4L2_CID_SATURATION)) + v4l2_ctrl_new_std(&dev->ctrl_handler, &em28xx_ctrl_ops, + V4L2_CID_SATURATION, + 0, 0x1f, 1, SATURATION_DEFAULT); + if (NULL == v4l2_ctrl_find(&dev->ctrl_handler, V4L2_CID_BLUE_BALANCE)) + v4l2_ctrl_new_std(&dev->ctrl_handler, &em28xx_ctrl_ops, + V4L2_CID_BLUE_BALANCE, + -0x30, 0x30, 1, BLUE_BALANCE_DEFAULT); + if (NULL == v4l2_ctrl_find(&dev->ctrl_handler, V4L2_CID_RED_BALANCE)) + v4l2_ctrl_new_std(&dev->ctrl_handler, &em28xx_ctrl_ops, + V4L2_CID_RED_BALANCE, + -0x30, 0x30, 1, RED_BALANCE_DEFAULT); + if (NULL == v4l2_ctrl_find(&dev->ctrl_handler, V4L2_CID_SHARPNESS)) + v4l2_ctrl_new_std(&dev->ctrl_handler, &em28xx_ctrl_ops, + V4L2_CID_SHARPNESS, + 0, 0x0f, 1, SHARPNESS_DEFAULT); + + /* Reset image controls */ + em28xx_colorlevels_set_default(dev); + v4l2_ctrl_handler_setup(&dev->ctrl_handler); + if (dev->ctrl_handler.error) + return dev->ctrl_handler.error; + + /* allocate and fill video video_device struct */ + dev->vdev = em28xx_vdev_init(dev, &em28xx_video_template, "video"); + if (!dev->vdev) { + em28xx_errdev("cannot allocate video_device.\n"); + return -ENODEV; + } + dev->vdev->queue = &dev->vb_vidq; + dev->vdev->queue->lock = &dev->vb_queue_lock; + + /* disable inapplicable ioctls */ + if (dev->board.is_webcam) { + v4l2_disable_ioctl(dev->vdev, VIDIOC_QUERYSTD); + v4l2_disable_ioctl(dev->vdev, VIDIOC_G_STD); + v4l2_disable_ioctl(dev->vdev, VIDIOC_S_STD); + } else { + v4l2_disable_ioctl(dev->vdev, VIDIOC_S_PARM); + } + if (dev->tuner_type == TUNER_ABSENT) { + v4l2_disable_ioctl(dev->vdev, VIDIOC_G_TUNER); + v4l2_disable_ioctl(dev->vdev, VIDIOC_S_TUNER); + v4l2_disable_ioctl(dev->vdev, VIDIOC_G_FREQUENCY); + v4l2_disable_ioctl(dev->vdev, VIDIOC_S_FREQUENCY); + } + if (!dev->audio_mode.has_audio) { + v4l2_disable_ioctl(dev->vdev, VIDIOC_G_AUDIO); + v4l2_disable_ioctl(dev->vdev, VIDIOC_S_AUDIO); + } + + /* register v4l2 video video_device */ + ret = video_register_device(dev->vdev, VFL_TYPE_GRABBER, + video_nr[dev->devno]); + if (ret) { + em28xx_errdev("unable to register video device (error=%i).\n", + ret); + return ret; + } + + /* Allocate and fill vbi video_device struct */ + if (em28xx_vbi_supported(dev) == 1) { + dev->vbi_dev = em28xx_vdev_init(dev, &em28xx_video_template, + "vbi"); + + dev->vbi_dev->queue = &dev->vb_vbiq; + dev->vbi_dev->queue->lock = &dev->vb_vbi_queue_lock; + + /* disable inapplicable ioctls */ + v4l2_disable_ioctl(dev->vdev, VIDIOC_S_PARM); + if (dev->tuner_type == TUNER_ABSENT) { + v4l2_disable_ioctl(dev->vbi_dev, VIDIOC_G_TUNER); + v4l2_disable_ioctl(dev->vbi_dev, VIDIOC_S_TUNER); + v4l2_disable_ioctl(dev->vbi_dev, VIDIOC_G_FREQUENCY); + v4l2_disable_ioctl(dev->vbi_dev, VIDIOC_S_FREQUENCY); + } + if (!dev->audio_mode.has_audio) { + v4l2_disable_ioctl(dev->vbi_dev, VIDIOC_G_AUDIO); + v4l2_disable_ioctl(dev->vbi_dev, VIDIOC_S_AUDIO); + } + + /* register v4l2 vbi video_device */ + ret = video_register_device(dev->vbi_dev, VFL_TYPE_VBI, + vbi_nr[dev->devno]); + if (ret < 0) { + em28xx_errdev("unable to register vbi device\n"); + return ret; + } + } + + if (em28xx_boards[dev->model].radio.type == EM28XX_RADIO) { + dev->radio_dev = em28xx_vdev_init(dev, &em28xx_radio_template, + "radio"); + if (!dev->radio_dev) { + em28xx_errdev("cannot allocate video_device.\n"); + return -ENODEV; + } + ret = video_register_device(dev->radio_dev, VFL_TYPE_RADIO, + radio_nr[dev->devno]); + if (ret < 0) { + em28xx_errdev("can't register radio device\n"); + return ret; + } + em28xx_info("Registered radio device as %s\n", + video_device_node_name(dev->radio_dev)); + } + + em28xx_info("V4L2 video device registered as %s\n", + video_device_node_name(dev->vdev)); + + if (dev->vbi_dev) + em28xx_info("V4L2 VBI device registered as %s\n", + video_device_node_name(dev->vbi_dev)); + + return 0; +} |