| /* |
| 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> |
| |
| 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/version.h> |
| #include <linux/mm.h> |
| #include <linux/mutex.h> |
| |
| #include "em28xx.h" |
| #include <media/v4l2-common.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_NAME "em28xx" |
| #define DRIVER_DESC "Empia em28xx based USB video device driver" |
| #define EM28XX_VERSION_CODE KERNEL_VERSION(0, 1, 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) |
| |
| #define BUFFER_TIMEOUT msecs_to_jiffies(2000) /* 2 seconds */ |
| |
| /* Limits minimum and default number of buffers */ |
| #define EM28XX_MIN_BUF 4 |
| #define EM28XX_DEF_BUF 8 |
| |
| MODULE_AUTHOR(DRIVER_AUTHOR); |
| MODULE_DESCRIPTION(DRIVER_DESC); |
| MODULE_LICENSE("GPL"); |
| |
| static LIST_HEAD(em28xx_devlist); |
| |
| static unsigned int card[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET }; |
| static unsigned int video_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET }; |
| static unsigned int vbi_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET }; |
| static unsigned int radio_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET }; |
| |
| module_param_array(card, int, NULL, 0444); |
| 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(card, "card type"); |
| 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]"); |
| |
| /* Bitmask marking allocated devices from 0 to EM28XX_MAXBOARDS */ |
| static unsigned long em28xx_devused; |
| |
| /* supported controls */ |
| /* Common to all boards */ |
| static struct v4l2_queryctrl em28xx_qctrl[] = { |
| { |
| .id = V4L2_CID_AUDIO_VOLUME, |
| .type = V4L2_CTRL_TYPE_INTEGER, |
| .name = "Volume", |
| .minimum = 0x0, |
| .maximum = 0x1f, |
| .step = 0x1, |
| .default_value = 0x1f, |
| .flags = 0, |
| },{ |
| .id = V4L2_CID_AUDIO_MUTE, |
| .type = V4L2_CTRL_TYPE_BOOLEAN, |
| .name = "Mute", |
| .minimum = 0, |
| .maximum = 1, |
| .step = 1, |
| .default_value = 1, |
| .flags = 0, |
| } |
| }; |
| |
| static struct usb_driver em28xx_usb_driver; |
| |
| /* ------------------------------------------------------------------ |
| DMA and thread functions |
| ------------------------------------------------------------------*/ |
| |
| /* |
| * Announces that a buffer were filled and request the next |
| */ |
| static inline void buffer_filled(struct em28xx *dev, |
| struct em28xx_dmaqueue *dma_q, |
| struct em28xx_buffer *buf) |
| { |
| mod_timer(&dma_q->timeout, jiffies + BUFFER_TIMEOUT); |
| |
| /* Advice that buffer was filled */ |
| em28xx_isocdbg("[%p/%d] wakeup\n", buf, buf->vb.i); |
| buf->vb.state = VIDEOBUF_DONE; |
| buf->vb.field_count++; |
| do_gettimeofday(&buf->vb.ts); |
| |
| list_del(&buf->vb.queue); |
| wake_up(&buf->vb.done); |
| } |
| |
| /* |
| * Identify the buffer header type and properly handles |
| */ |
| static void em28xx_copy_video(struct em28xx *dev, |
| struct em28xx_dmaqueue *dma_q, |
| struct em28xx_buffer *buf, |
| unsigned char *p, |
| unsigned char *outp, unsigned long len) |
| { |
| void *fieldstart, *startwrite, *startread; |
| int linesdone, currlinedone, offset, lencopy, remain; |
| |
| if (dev->frame_size != buf->vb.size) { |
| em28xx_errdev("size %i and buf.length %lu are different!\n", |
| dev->frame_size, buf->vb.size); |
| return; |
| } |
| |
| if (dma_q->pos + len > buf->vb.size) |
| len = buf->vb.size - dma_q->pos; |
| |
| if (p[0] != 0x88 && p[0] != 0x22) { |
| em28xx_isocdbg("frame is not complete\n"); |
| len += 4; |
| } else |
| p += 4; |
| |
| startread = p; |
| remain = len; |
| |
| /* Interlaces frame */ |
| if (buf->top_field) |
| fieldstart = outp; |
| else |
| fieldstart = outp + dev->bytesperline; |
| |
| linesdone = dma_q->pos / dev->bytesperline; |
| currlinedone = dma_q->pos % dev->bytesperline; |
| offset = linesdone * dev->bytesperline * 2 + currlinedone; |
| startwrite = fieldstart + offset; |
| lencopy = dev->bytesperline - currlinedone; |
| lencopy = lencopy > remain ? remain : lencopy; |
| |
| if ((char *)startwrite + lencopy > (char *)outp + buf->vb.size) { |
| em28xx_isocdbg("Overflow of %zi bytes past buffer end (1)\n", |
| ((char *)startwrite + lencopy) - |
| ((char *)outp + buf->vb.size)); |
| lencopy = remain = (char *)outp + buf->vb.size - (char *)startwrite; |
| } |
| if (lencopy <= 0) |
| return; |
| memcpy(startwrite, startread, lencopy); |
| |
| remain -= lencopy; |
| |
| while (remain > 0) { |
| startwrite += lencopy + dev->bytesperline; |
| startread += lencopy; |
| if (dev->bytesperline > remain) |
| lencopy = remain; |
| else |
| lencopy = dev->bytesperline; |
| |
| if ((char *)startwrite + lencopy > (char *)outp + buf->vb.size) { |
| em28xx_isocdbg("Overflow of %zi bytes past buffer end (2)\n", |
| ((char *)startwrite + lencopy) - |
| ((char *)outp + buf->vb.size)); |
| lencopy = remain = (char *)outp + buf->vb.size - |
| (char *)startwrite; |
| } |
| if (lencopy <= 0) |
| break; |
| |
| memcpy(startwrite, startread, lencopy); |
| |
| remain -= lencopy; |
| } |
| |
| dma_q->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); |
| } |
| } |
| |
| /* |
| * video-buf generic routine to get the next available buffer |
| */ |
| static inline int get_next_buf(struct em28xx_dmaqueue *dma_q, |
| struct em28xx_buffer **buf) |
| { |
| struct em28xx *dev = container_of(dma_q, struct em28xx, vidq); |
| |
| if (list_empty(&dma_q->active)) { |
| em28xx_isocdbg("No active queue to serve\n"); |
| return 0; |
| } |
| |
| *buf = list_entry(dma_q->active.next, struct em28xx_buffer, vb.queue); |
| |
| return 1; |
| } |
| |
| /* |
| * Controls the isoc copy of each urb packet |
| */ |
| static inline int em28xx_isoc_copy(struct urb *urb) |
| { |
| struct em28xx_buffer *buf; |
| struct em28xx_dmaqueue *dma_q = urb->context; |
| struct em28xx *dev = container_of(dma_q, struct em28xx, vidq); |
| unsigned char *outp; |
| int i, len = 0, rc = 1; |
| unsigned char *p; |
| |
| if (!dev) |
| return 0; |
| |
| if ((dev->state & DEV_DISCONNECTED) || (dev->state & DEV_MISCONFIGURED)) |
| return 0; |
| |
| if (urb->status < 0) { |
| print_err_status(dev, -1, urb->status); |
| if (urb->status == -ENOENT) |
| return 0; |
| } |
| |
| buf = dev->isoc_ctl.buf; |
| |
| if (!buf) { |
| rc = get_next_buf(dma_q, &buf); |
| if (rc <= 0) |
| return rc; |
| } |
| |
| outp = videobuf_to_vmalloc(&buf->vb); |
| |
| for (i = 0; i < urb->number_of_packets; i++) { |
| int status = urb->iso_frame_desc[i].status; |
| |
| if (status < 0) { |
| print_err_status(dev, i, status); |
| if (urb->iso_frame_desc[i].status != -EPROTO) |
| continue; |
| } |
| |
| len = urb->iso_frame_desc[i].actual_length - 4; |
| |
| if (urb->iso_frame_desc[i].actual_length <= 0) { |
| /* em28xx_isocdbg("packet %d is empty",i); - spammy */ |
| continue; |
| } |
| if (urb->iso_frame_desc[i].actual_length > |
| dev->max_pkt_size) { |
| em28xx_isocdbg("packet bigger than packet size"); |
| continue; |
| } |
| |
| p = urb->transfer_buffer + urb->iso_frame_desc[i].offset; |
| |
| /* FIXME: incomplete buffer checks where removed to make |
| logic simpler. Impacts of those changes should be evaluated |
| */ |
| if (p[0] == 0x22 && p[1] == 0x5a) { |
| em28xx_isocdbg("Video frame %d, length=%i, %s\n", p[2], |
| len, (p[2] & 1)? "odd" : "even"); |
| |
| if (p[2] & 1) |
| buf->top_field = 0; |
| else { |
| if (buf->receiving) { |
| buffer_filled(dev, dma_q, buf); |
| rc = get_next_buf(dma_q, &buf); |
| if (rc <= 0) |
| return rc; |
| |
| outp = videobuf_to_vmalloc(&buf->vb); |
| } |
| |
| buf->top_field = 1; |
| } |
| buf->receiving = 1; |
| dma_q->pos = 0; |
| } else if (p[0] == 0x33 && p[1] == 0x95 && p[2] == 0x00) { |
| em28xx_isocdbg("VBI HEADER!!!\n"); |
| } |
| |
| em28xx_copy_video(dev, dma_q, buf, p, outp, len); |
| |
| /* FIXME: Should add vbi copy */ |
| } |
| return rc; |
| } |
| |
| /* ------------------------------------------------------------------ |
| URB control |
| ------------------------------------------------------------------*/ |
| |
| /* |
| * IRQ callback, called by URB callback |
| */ |
| static void em28xx_irq_callback(struct urb *urb) |
| { |
| struct em28xx_dmaqueue *dma_q = urb->context; |
| struct em28xx *dev = container_of(dma_q, struct em28xx, vidq); |
| int rc, i; |
| unsigned long flags; |
| |
| spin_lock_irqsave(&dev->slock, flags); |
| |
| /* Copy data from URB */ |
| rc = em28xx_isoc_copy(urb); |
| |
| /* Reset urb buffers */ |
| for (i = 0; i < urb->number_of_packets; i++) { |
| urb->iso_frame_desc[i].status = 0; |
| urb->iso_frame_desc[i].actual_length = 0; |
| } |
| urb->status = 0; |
| |
| urb->status = usb_submit_urb(urb, GFP_ATOMIC); |
| if (urb->status) { |
| em28xx_err("urb resubmit failed (error=%i)\n", |
| urb->status); |
| } |
| |
| spin_unlock_irqrestore(&dev->slock, flags); |
| } |
| |
| /* |
| * Stop and Deallocate URBs |
| */ |
| static void em28xx_uninit_isoc(struct em28xx *dev) |
| { |
| struct urb *urb; |
| int i; |
| |
| em28xx_isocdbg("em28xx: called em28xx_uninit_isoc\n"); |
| |
| dev->isoc_ctl.nfields = -1; |
| dev->isoc_ctl.buf = NULL; |
| for (i = 0; i < dev->isoc_ctl.num_bufs; i++) { |
| urb = dev->isoc_ctl.urb[i]; |
| if (urb) { |
| usb_kill_urb(urb); |
| usb_unlink_urb(urb); |
| if (dev->isoc_ctl.transfer_buffer[i]) { |
| usb_buffer_free(dev->udev, |
| urb->transfer_buffer_length, |
| dev->isoc_ctl.transfer_buffer[i], |
| urb->transfer_dma); |
| } |
| usb_free_urb(urb); |
| dev->isoc_ctl.urb[i] = NULL; |
| } |
| dev->isoc_ctl.transfer_buffer[i] = NULL; |
| } |
| |
| kfree(dev->isoc_ctl.urb); |
| kfree(dev->isoc_ctl.transfer_buffer); |
| dev->isoc_ctl.urb = NULL; |
| dev->isoc_ctl.transfer_buffer = NULL; |
| |
| dev->isoc_ctl.num_bufs = 0; |
| |
| del_timer(&dev->vidq.timeout); |
| em28xx_capture_start(dev, 0); |
| } |
| |
| /* |
| * Allocate URBs and start IRQ |
| */ |
| static int em28xx_prepare_isoc(struct em28xx *dev, int max_packets, |
| int num_bufs) |
| { |
| struct em28xx_dmaqueue *dma_q = &dev->vidq; |
| int i; |
| int sb_size, pipe; |
| struct urb *urb; |
| int j, k; |
| |
| em28xx_isocdbg("em28xx: called em28xx_prepare_isoc\n"); |
| |
| /* De-allocates all pending stuff */ |
| em28xx_uninit_isoc(dev); |
| |
| dev->isoc_ctl.num_bufs = num_bufs; |
| |
| dev->isoc_ctl.urb = kzalloc(sizeof(void *)*num_bufs, GFP_KERNEL); |
| if (!dev->isoc_ctl.urb) { |
| em28xx_errdev("cannot alloc memory for usb buffers\n"); |
| return -ENOMEM; |
| } |
| |
| dev->isoc_ctl.transfer_buffer = kzalloc(sizeof(void *)*num_bufs, |
| GFP_KERNEL); |
| if (!dev->isoc_ctl.urb) { |
| em28xx_errdev("cannot allocate memory for usbtransfer\n"); |
| kfree(dev->isoc_ctl.urb); |
| return -ENOMEM; |
| } |
| |
| dev->isoc_ctl.max_pkt_size = dev->max_pkt_size; |
| |
| sb_size = max_packets * dev->isoc_ctl.max_pkt_size; |
| |
| /* allocate urbs and transfer buffers */ |
| for (i = 0; i < dev->isoc_ctl.num_bufs; i++) { |
| urb = usb_alloc_urb(max_packets, GFP_KERNEL); |
| if (!urb) { |
| em28xx_err("cannot alloc isoc_ctl.urb %i\n", i); |
| em28xx_uninit_isoc(dev); |
| return -ENOMEM; |
| } |
| dev->isoc_ctl.urb[i] = urb; |
| |
| dev->isoc_ctl.transfer_buffer[i] = usb_buffer_alloc(dev->udev, |
| sb_size, GFP_KERNEL, &urb->transfer_dma); |
| if (!dev->isoc_ctl.transfer_buffer[i]) { |
| em28xx_err("unable to allocate %i bytes for transfer" |
| " buffer %i%s\n", |
| sb_size, i, |
| in_interrupt()?" while in int":""); |
| em28xx_uninit_isoc(dev); |
| return -ENOMEM; |
| } |
| memset(dev->isoc_ctl.transfer_buffer[i], 0, sb_size); |
| |
| /* FIXME: this is a hack - should be |
| 'desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK' |
| should also be using 'desc.bInterval' |
| */ |
| pipe = usb_rcvisocpipe(dev->udev, 0x82); |
| usb_fill_int_urb(urb, dev->udev, pipe, |
| dev->isoc_ctl.transfer_buffer[i], sb_size, |
| em28xx_irq_callback, dma_q, 1); |
| |
| urb->number_of_packets = max_packets; |
| urb->transfer_flags = URB_ISO_ASAP; |
| |
| k = 0; |
| for (j = 0; j < max_packets; j++) { |
| urb->iso_frame_desc[j].offset = k; |
| urb->iso_frame_desc[j].length = |
| dev->isoc_ctl.max_pkt_size; |
| k += dev->isoc_ctl.max_pkt_size; |
| } |
| } |
| |
| return 0; |
| } |
| |
| static int em28xx_start_thread(struct em28xx_dmaqueue *dma_q) |
| { |
| struct em28xx *dev = container_of(dma_q, struct em28xx, vidq); |
| int i, rc = 0; |
| |
| em28xx_videodbg("Called em28xx_start_thread\n"); |
| |
| init_waitqueue_head(&dma_q->wq); |
| |
| em28xx_capture_start(dev, 1); |
| |
| /* submit urbs and enables IRQ */ |
| for (i = 0; i < dev->isoc_ctl.num_bufs; i++) { |
| rc = usb_submit_urb(dev->isoc_ctl.urb[i], GFP_ATOMIC); |
| if (rc) { |
| em28xx_err("submit of urb %i failed (error=%i)\n", i, |
| rc); |
| em28xx_uninit_isoc(dev); |
| return rc; |
| } |
| } |
| |
| if (rc < 0) |
| return rc; |
| |
| return 0; |
| } |
| |
| static void em28xx_vid_timeout(unsigned long data) |
| { |
| struct em28xx *dev = (struct em28xx *)data; |
| struct em28xx_dmaqueue *vidq = &dev->vidq; |
| struct em28xx_buffer *buf; |
| unsigned long flags; |
| |
| spin_lock_irqsave(&dev->slock, flags); |
| |
| list_for_each_entry(buf, vidq->active.next, vb.queue) { |
| list_del(&buf->vb.queue); |
| buf->vb.state = VIDEOBUF_ERROR; |
| wake_up(&buf->vb.done); |
| em28xx_videodbg("em28xx/0: [%p/%d] timeout\n", |
| buf, buf->vb.i); |
| } |
| /* Instead of trying to restart, just sets timeout again */ |
| mod_timer(&vidq->timeout, jiffies + BUFFER_TIMEOUT); |
| |
| spin_unlock_irqrestore(&dev->slock, flags); |
| } |
| |
| /* ------------------------------------------------------------------ |
| Videobuf operations |
| ------------------------------------------------------------------*/ |
| |
| static int |
| buffer_setup(struct videobuf_queue *vq, unsigned int *count, unsigned int *size) |
| { |
| struct em28xx_fh *fh = vq->priv_data; |
| |
| *size = 16 * fh->dev->width * fh->dev->height >> 3; |
| if (0 == *count) |
| *count = EM28XX_DEF_BUF; |
| |
| if (*count < EM28XX_MIN_BUF) |
| *count = EM28XX_MIN_BUF; |
| |
| return 0; |
| } |
| |
| static void free_buffer(struct videobuf_queue *vq, struct em28xx_buffer *buf) |
| { |
| if (in_interrupt()) |
| BUG(); |
| |
| videobuf_waiton(&buf->vb, 0, 0); |
| videobuf_vmalloc_free(&buf->vb); |
| buf->vb.state = VIDEOBUF_NEEDS_INIT; |
| } |
| |
| static int |
| buffer_prepare(struct videobuf_queue *vq, struct videobuf_buffer *vb, |
| enum v4l2_field field) |
| { |
| struct em28xx_fh *fh = vq->priv_data; |
| struct em28xx_buffer *buf = container_of(vb, struct em28xx_buffer, vb); |
| struct em28xx *dev = fh->dev; |
| struct em28xx_dmaqueue *vidq = &dev->vidq; |
| int rc = 0, urb_init = 0; |
| |
| /* BUG_ON(NULL == fh->fmt); */ |
| |
| /* FIXME: It assumes depth = 16 */ |
| /* The only currently supported format is 16 bits/pixel */ |
| buf->vb.size = 16 * dev->width * dev->height >> 3; |
| |
| if (0 != buf->vb.baddr && buf->vb.bsize < buf->vb.size) |
| return -EINVAL; |
| |
| buf->fmt = fh->fmt; |
| buf->vb.width = dev->width; |
| buf->vb.height = dev->height; |
| buf->vb.field = field; |
| |
| if (VIDEOBUF_NEEDS_INIT == buf->vb.state) { |
| rc = videobuf_iolock(vq, &buf->vb, NULL); |
| if (rc < 0) |
| goto fail; |
| } |
| |
| if (!dev->isoc_ctl.num_bufs) |
| urb_init = 1; |
| |
| if (urb_init) { |
| rc = em28xx_prepare_isoc(dev, EM28XX_NUM_PACKETS, |
| EM28XX_NUM_BUFS); |
| if (rc < 0) |
| goto fail; |
| |
| rc = em28xx_start_thread(vidq); |
| if (rc < 0) |
| goto fail; |
| } |
| |
| buf->vb.state = VIDEOBUF_PREPARED; |
| return 0; |
| |
| fail: |
| free_buffer(vq, buf); |
| return rc; |
| } |
| |
| static void |
| buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb) |
| { |
| struct em28xx_buffer *buf = container_of(vb, struct em28xx_buffer, vb); |
| struct em28xx_fh *fh = vq->priv_data; |
| struct em28xx *dev = fh->dev; |
| struct em28xx_dmaqueue *vidq = &dev->vidq; |
| |
| buf->vb.state = VIDEOBUF_QUEUED; |
| list_add_tail(&buf->vb.queue, &vidq->active); |
| |
| } |
| |
| static void buffer_release(struct videobuf_queue *vq, struct videobuf_buffer *vb) |
| { |
| struct em28xx_buffer *buf = container_of(vb, struct em28xx_buffer, vb); |
| struct em28xx_fh *fh = vq->priv_data; |
| struct em28xx *dev = (struct em28xx *)fh->dev; |
| |
| em28xx_isocdbg("em28xx: called buffer_release\n"); |
| |
| free_buffer(vq, buf); |
| } |
| |
| static struct videobuf_queue_ops em28xx_video_qops = { |
| .buf_setup = buffer_setup, |
| .buf_prepare = buffer_prepare, |
| .buf_queue = buffer_queue, |
| .buf_release = buffer_release, |
| }; |
| |
| /********************* v4l2 interface ******************************************/ |
| |
| /* |
| * em28xx_config() |
| * inits registers with sane defaults |
| */ |
| static int em28xx_config(struct em28xx *dev) |
| { |
| |
| /* Sets I2C speed to 100 KHz */ |
| if (!dev->is_em2800) |
| em28xx_write_regs_req(dev, 0x00, 0x06, "\x40", 1); |
| |
| /* enable vbi capturing */ |
| |
| /* em28xx_write_regs_req(dev,0x00,0x0e,"\xC0",1); audio register */ |
| /* em28xx_write_regs_req(dev,0x00,0x0f,"\x80",1); clk register */ |
| em28xx_write_regs_req(dev,0x00,0x11,"\x51",1); |
| |
| dev->mute = 1; /* maybe not the right place... */ |
| dev->volume = 0x1f; |
| |
| em28xx_outfmt_set_yuv422(dev); |
| em28xx_colorlevels_set_default(dev); |
| em28xx_compression_disable(dev); |
| |
| return 0; |
| } |
| |
| /* |
| * em28xx_config_i2c() |
| * configure i2c attached devices |
| */ |
| static void em28xx_config_i2c(struct em28xx *dev) |
| { |
| struct v4l2_routing route; |
| |
| route.input = INPUT(dev->ctl_input)->vmux; |
| route.output = 0; |
| em28xx_i2c_call_clients(dev, VIDIOC_INT_RESET, NULL); |
| em28xx_i2c_call_clients(dev, VIDIOC_INT_S_VIDEO_ROUTING, &route); |
| em28xx_i2c_call_clients(dev, VIDIOC_STREAMON, NULL); |
| } |
| |
| static void video_mux(struct em28xx *dev, int index) |
| { |
| struct v4l2_routing route; |
| |
| route.input = INPUT(index)->vmux; |
| route.output = 0; |
| dev->ctl_input = index; |
| dev->ctl_ainput = INPUT(index)->amux; |
| |
| em28xx_i2c_call_clients(dev, VIDIOC_INT_S_VIDEO_ROUTING, &route); |
| |
| if (dev->has_msp34xx) { |
| if (dev->i2s_speed) |
| em28xx_i2c_call_clients(dev, VIDIOC_INT_I2S_CLOCK_FREQ, &dev->i2s_speed); |
| route.input = dev->ctl_ainput; |
| route.output = MSP_OUTPUT(MSP_SC_IN_DSP_SCART1); |
| /* Note: this is msp3400 specific */ |
| em28xx_i2c_call_clients(dev, VIDIOC_INT_S_AUDIO_ROUTING, &route); |
| } |
| |
| em28xx_audio_analog_set(dev); |
| } |
| |
| /* Usage lock check functions */ |
| static int res_get(struct em28xx_fh *fh) |
| { |
| struct em28xx *dev = fh->dev; |
| int rc = 0; |
| |
| /* This instance already has stream_on */ |
| if (fh->stream_on) |
| return rc; |
| |
| if (dev->stream_on) |
| return -EINVAL; |
| |
| mutex_lock(&dev->lock); |
| dev->stream_on = 1; |
| fh->stream_on = 1; |
| mutex_unlock(&dev->lock); |
| return rc; |
| } |
| |
| static int res_check(struct em28xx_fh *fh) |
| { |
| return (fh->stream_on); |
| } |
| |
| static void res_free(struct em28xx_fh *fh) |
| { |
| struct em28xx *dev = fh->dev; |
| |
| mutex_lock(&dev->lock); |
| fh->stream_on = 0; |
| dev->stream_on = 0; |
| mutex_unlock(&dev->lock); |
| } |
| |
| /* |
| * em28xx_get_ctrl() |
| * return the current saturation, brightness or contrast, mute state |
| */ |
| static int em28xx_get_ctrl(struct em28xx *dev, struct v4l2_control *ctrl) |
| { |
| switch (ctrl->id) { |
| case V4L2_CID_AUDIO_MUTE: |
| ctrl->value = dev->mute; |
| return 0; |
| case V4L2_CID_AUDIO_VOLUME: |
| ctrl->value = dev->volume; |
| return 0; |
| default: |
| return -EINVAL; |
| } |
| } |
| |
| /* |
| * em28xx_set_ctrl() |
| * mute or set new saturation, brightness or contrast |
| */ |
| static int em28xx_set_ctrl(struct em28xx *dev, const struct v4l2_control *ctrl) |
| { |
| switch (ctrl->id) { |
| case V4L2_CID_AUDIO_MUTE: |
| if (ctrl->value != dev->mute) { |
| dev->mute = ctrl->value; |
| return em28xx_audio_analog_set(dev); |
| } |
| return 0; |
| case V4L2_CID_AUDIO_VOLUME: |
| dev->volume = ctrl->value; |
| return em28xx_audio_analog_set(dev); |
| default: |
| return -EINVAL; |
| } |
| } |
| |
| static int check_dev(struct em28xx *dev) |
| { |
| if (dev->state & DEV_DISCONNECTED) { |
| em28xx_errdev("v4l2 ioctl: device not present\n"); |
| return -ENODEV; |
| } |
| |
| if (dev->state & DEV_MISCONFIGURED) { |
| em28xx_errdev("v4l2 ioctl: device is misconfigured; " |
| "close and open it again\n"); |
| return -EIO; |
| } |
| return 0; |
| } |
| |
| static void get_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 >= 0x4000) |
| *hscale = 0x3fff; |
| |
| *vscale = (((unsigned long)maxh) << 12) / height - 4096L; |
| if (*vscale >= 0x4000) |
| *vscale = 0x3fff; |
| } |
| |
| /* ------------------------------------------------------------------ |
| IOCTL vidioc handling |
| ------------------------------------------------------------------*/ |
| |
| static int vidioc_g_fmt_cap(struct file *file, void *priv, |
| struct v4l2_format *f) |
| { |
| struct em28xx_fh *fh = priv; |
| struct em28xx *dev = fh->dev; |
| |
| mutex_lock(&dev->lock); |
| |
| f->fmt.pix.width = dev->width; |
| f->fmt.pix.height = dev->height; |
| f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV; |
| f->fmt.pix.bytesperline = dev->bytesperline; |
| f->fmt.pix.sizeimage = dev->frame_size; |
| f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M; |
| |
| /* FIXME: TOP? NONE? BOTTOM? ALTENATE? */ |
| f->fmt.pix.field = dev->interlaced ? |
| V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP; |
| |
| mutex_unlock(&dev->lock); |
| return 0; |
| } |
| |
| static int vidioc_try_fmt_cap(struct file *file, void *priv, |
| struct v4l2_format *f) |
| { |
| struct em28xx_fh *fh = priv; |
| struct em28xx *dev = fh->dev; |
| int width = f->fmt.pix.width; |
| int height = f->fmt.pix.height; |
| unsigned int maxw = norm_maxw(dev); |
| unsigned int maxh = norm_maxh(dev); |
| unsigned int hscale, vscale; |
| |
| /* width must even because of the YUYV format |
| height must be even because of interlacing */ |
| height &= 0xfffe; |
| width &= 0xfffe; |
| |
| if (height < 32) |
| height = 32; |
| if (height > maxh) |
| height = maxh; |
| if (width < 48) |
| width = 48; |
| if (width > maxw) |
| width = maxw; |
| |
| mutex_lock(&dev->lock); |
| |
| if (dev->is_em2800) { |
| /* the em2800 can only scale down to 50% */ |
| if (height % (maxh / 2)) |
| height = maxh; |
| if (width % (maxw / 2)) |
| width = maxw; |
| /* according to empiatech support */ |
| /* the MaxPacketSize is to small to support */ |
| /* framesizes larger than 640x480 @ 30 fps */ |
| /* or 640x576 @ 25 fps. As this would cut */ |
| /* of a part of the image we prefer */ |
| /* 360x576 or 360x480 for now */ |
| if (width == maxw && height == maxh) |
| width /= 2; |
| } |
| |
| get_scale(dev, width, height, &hscale, &vscale); |
| |
| width = (((unsigned long)maxw) << 12) / (hscale + 4096L); |
| height = (((unsigned long)maxh) << 12) / (vscale + 4096L); |
| |
| f->fmt.pix.width = width; |
| f->fmt.pix.height = height; |
| f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV; |
| f->fmt.pix.bytesperline = width * 2; |
| f->fmt.pix.sizeimage = width * 2 * height; |
| f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M; |
| f->fmt.pix.field = V4L2_FIELD_INTERLACED; |
| |
| mutex_unlock(&dev->lock); |
| return 0; |
| } |
| |
| static int vidioc_s_fmt_cap(struct file *file, void *priv, |
| struct v4l2_format *f) |
| { |
| struct em28xx_fh *fh = priv; |
| struct em28xx *dev = fh->dev; |
| int rc; |
| |
| rc = check_dev(dev); |
| if (rc < 0) |
| return rc; |
| |
| vidioc_try_fmt_cap(file, priv, f); |
| |
| mutex_lock(&dev->lock); |
| |
| if (videobuf_queue_is_busy(&fh->vb_vidq)) { |
| em28xx_errdev("%s queue busy\n", __func__); |
| rc = -EBUSY; |
| goto out; |
| } |
| |
| /* set new image size */ |
| dev->width = f->fmt.pix.width; |
| dev->height = f->fmt.pix.height; |
| dev->frame_size = dev->width * dev->height * 2; |
| dev->field_size = dev->frame_size >> 1; |
| dev->bytesperline = dev->width * 2; |
| get_scale(dev, dev->width, dev->height, &dev->hscale, &dev->vscale); |
| |
| em28xx_set_alternate(dev); |
| em28xx_resolution_set(dev); |
| |
| rc = 0; |
| |
| out: |
| mutex_unlock(&dev->lock); |
| return rc; |
| } |
| |
| 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; |
| int rc; |
| |
| rc = check_dev(dev); |
| if (rc < 0) |
| return rc; |
| |
| mutex_lock(&dev->lock); |
| dev->norm = *norm; |
| mutex_unlock(&dev->lock); |
| |
| /* Adjusts width/height, if needed */ |
| f.fmt.pix.width = dev->width; |
| f.fmt.pix.height = dev->height; |
| vidioc_try_fmt_cap(file, priv, &f); |
| |
| mutex_lock(&dev->lock); |
| |
| /* set new image size */ |
| dev->width = f.fmt.pix.width; |
| dev->height = f.fmt.pix.height; |
| dev->frame_size = dev->width * dev->height * 2; |
| dev->field_size = dev->frame_size >> 1; |
| dev->bytesperline = dev->width * 2; |
| get_scale(dev, dev->width, dev->height, &dev->hscale, &dev->vscale); |
| |
| em28xx_resolution_set(dev); |
| em28xx_i2c_call_clients(dev, VIDIOC_S_STD, &dev->norm); |
| |
| mutex_unlock(&dev->lock); |
| return 0; |
| } |
| |
| 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; |
| |
| 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; |
| int rc; |
| |
| rc = check_dev(dev); |
| if (rc < 0) |
| return rc; |
| |
| if (i >= MAX_EM28XX_INPUT) |
| return -EINVAL; |
| if (0 == INPUT(i)->type) |
| return -EINVAL; |
| |
| mutex_lock(&dev->lock); |
| |
| video_mux(dev, i); |
| |
| mutex_unlock(&dev->lock); |
| 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; |
| unsigned int index = a->index; |
| |
| if (a->index > 1) |
| return -EINVAL; |
| |
| index = dev->ctl_ainput; |
| |
| if (index == 0) { |
| strcpy(a->name, "Television"); |
| } else { |
| strcpy(a->name, "Line In"); |
| } |
| a->capability = V4L2_AUDCAP_STEREO; |
| a->index = index; |
| |
| return 0; |
| } |
| |
| static int vidioc_s_audio(struct file *file, void *priv, struct v4l2_audio *a) |
| { |
| struct em28xx_fh *fh = priv; |
| struct em28xx *dev = fh->dev; |
| |
| if (a->index != dev->ctl_ainput) |
| return -EINVAL; |
| |
| return 0; |
| } |
| |
| static int vidioc_queryctrl(struct file *file, void *priv, |
| struct v4l2_queryctrl *qc) |
| { |
| struct em28xx_fh *fh = priv; |
| struct em28xx *dev = fh->dev; |
| int id = qc->id; |
| int i; |
| int rc; |
| |
| rc = check_dev(dev); |
| if (rc < 0) |
| return rc; |
| |
| memset(qc, 0, sizeof(*qc)); |
| |
| qc->id = id; |
| |
| if (!dev->has_msp34xx) { |
| for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) { |
| if (qc->id && qc->id == em28xx_qctrl[i].id) { |
| memcpy(qc, &(em28xx_qctrl[i]), sizeof(*qc)); |
| return 0; |
| } |
| } |
| } |
| mutex_lock(&dev->lock); |
| em28xx_i2c_call_clients(dev, VIDIOC_QUERYCTRL, qc); |
| mutex_unlock(&dev->lock); |
| |
| if (qc->type) |
| return 0; |
| else |
| return -EINVAL; |
| } |
| |
| static int vidioc_g_ctrl(struct file *file, void *priv, |
| struct v4l2_control *ctrl) |
| { |
| struct em28xx_fh *fh = priv; |
| struct em28xx *dev = fh->dev; |
| int rc; |
| |
| rc = check_dev(dev); |
| if (rc < 0) |
| return rc; |
| mutex_lock(&dev->lock); |
| |
| if (!dev->has_msp34xx) |
| rc = em28xx_get_ctrl(dev, ctrl); |
| else |
| rc = -EINVAL; |
| |
| if (rc == -EINVAL) { |
| em28xx_i2c_call_clients(dev, VIDIOC_G_CTRL, ctrl); |
| rc = 0; |
| } |
| |
| mutex_unlock(&dev->lock); |
| return rc; |
| } |
| |
| static int vidioc_s_ctrl(struct file *file, void *priv, |
| struct v4l2_control *ctrl) |
| { |
| struct em28xx_fh *fh = priv; |
| struct em28xx *dev = fh->dev; |
| u8 i; |
| int rc; |
| |
| rc = check_dev(dev); |
| if (rc < 0) |
| return rc; |
| |
| mutex_lock(&dev->lock); |
| |
| if (dev->has_msp34xx) |
| em28xx_i2c_call_clients(dev, VIDIOC_S_CTRL, ctrl); |
| else { |
| rc = 1; |
| for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) { |
| if (ctrl->id == em28xx_qctrl[i].id) { |
| if (ctrl->value < em28xx_qctrl[i].minimum || |
| ctrl->value > em28xx_qctrl[i].maximum) { |
| rc = -ERANGE; |
| break; |
| } |
| |
| rc = em28xx_set_ctrl(dev, ctrl); |
| break; |
| } |
| } |
| } |
| |
| /* Control not found - try to send it to the attached devices */ |
| if (rc == 1) { |
| em28xx_i2c_call_clients(dev, VIDIOC_S_CTRL, ctrl); |
| rc = 0; |
| } |
| |
| mutex_unlock(&dev->lock); |
| return rc; |
| } |
| |
| static int vidioc_g_tuner(struct file *file, void *priv, |
| struct v4l2_tuner *t) |
| { |
| struct em28xx_fh *fh = priv; |
| struct em28xx *dev = fh->dev; |
| int rc; |
| |
| rc = check_dev(dev); |
| if (rc < 0) |
| return rc; |
| |
| if (0 != t->index) |
| return -EINVAL; |
| |
| strcpy(t->name, "Tuner"); |
| |
| mutex_lock(&dev->lock); |
| |
| em28xx_i2c_call_clients(dev, VIDIOC_G_TUNER, t); |
| |
| mutex_unlock(&dev->lock); |
| return 0; |
| } |
| |
| static int vidioc_s_tuner(struct file *file, void *priv, |
| struct v4l2_tuner *t) |
| { |
| struct em28xx_fh *fh = priv; |
| struct em28xx *dev = fh->dev; |
| int rc; |
| |
| rc = check_dev(dev); |
| if (rc < 0) |
| return rc; |
| |
| if (0 != t->index) |
| return -EINVAL; |
| |
| mutex_lock(&dev->lock); |
| |
| em28xx_i2c_call_clients(dev, VIDIOC_S_TUNER, t); |
| |
| mutex_unlock(&dev->lock); |
| 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; |
| |
| f->type = fh->radio ? V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; |
| f->frequency = dev->ctl_freq; |
| |
| return 0; |
| } |
| |
| static int vidioc_s_frequency(struct file *file, void *priv, |
| struct v4l2_frequency *f) |
| { |
| struct em28xx_fh *fh = priv; |
| struct em28xx *dev = fh->dev; |
| int rc; |
| |
| rc = check_dev(dev); |
| if (rc < 0) |
| return rc; |
| |
| if (0 != f->tuner) |
| return -EINVAL; |
| |
| if (unlikely(0 == fh->radio && f->type != V4L2_TUNER_ANALOG_TV)) |
| return -EINVAL; |
| if (unlikely(1 == fh->radio && f->type != V4L2_TUNER_RADIO)) |
| return -EINVAL; |
| |
| mutex_lock(&dev->lock); |
| |
| dev->ctl_freq = f->frequency; |
| em28xx_i2c_call_clients(dev, VIDIOC_S_FREQUENCY, f); |
| |
| mutex_unlock(&dev->lock); |
| return 0; |
| } |
| |
| #ifdef CONFIG_VIDEO_ADV_DEBUG |
| static int em28xx_reg_len(int reg) |
| { |
| switch (reg) { |
| case AC97LSB_REG: |
| case HSCALELOW_REG: |
| case VSCALELOW_REG: |
| return 2; |
| default: |
| return 1; |
| } |
| } |
| |
| static int vidioc_g_register(struct file *file, void *priv, |
| struct v4l2_register *reg) |
| { |
| struct em28xx_fh *fh = priv; |
| struct em28xx *dev = fh->dev; |
| int ret; |
| |
| if (!v4l2_chip_match_host(reg->match_type, reg->match_chip)) |
| return -EINVAL; |
| |
| if (em28xx_reg_len(reg->reg) == 1) { |
| ret = em28xx_read_reg(dev, reg->reg); |
| if (ret < 0) |
| return ret; |
| |
| reg->val = ret; |
| } else { |
| u64 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 = cpu_to_le64((__u64)val); |
| } |
| |
| return 0; |
| } |
| |
| static int vidioc_s_register(struct file *file, void *priv, |
| struct v4l2_register *reg) |
| { |
| struct em28xx_fh *fh = priv; |
| struct em28xx *dev = fh->dev; |
| u64 buf; |
| |
| buf = le64_to_cpu((__u64)reg->val); |
| |
| return em28xx_write_regs(dev, reg->reg, (char *)&buf, |
| em28xx_reg_len(reg->reg)); |
| } |
| #endif |
| |
| |
| static int vidioc_cropcap(struct file *file, void *priv, |
| struct v4l2_cropcap *cc) |
| { |
| struct em28xx_fh *fh = priv; |
| struct em28xx *dev = fh->dev; |
| |
| if (cc->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
| return -EINVAL; |
| |
| cc->bounds.left = 0; |
| cc->bounds.top = 0; |
| cc->bounds.width = dev->width; |
| cc->bounds.height = dev->height; |
| cc->defrect = cc->bounds; |
| cc->pixelaspect.numerator = 54; /* 4:3 FIXME: remove magic numbers */ |
| cc->pixelaspect.denominator = 59; |
| |
| return 0; |
| } |
| |
| static int vidioc_streamon(struct file *file, void *priv, |
| enum v4l2_buf_type type) |
| { |
| struct em28xx_fh *fh = priv; |
| struct em28xx *dev = fh->dev; |
| int rc; |
| |
| rc = check_dev(dev); |
| if (rc < 0) |
| return rc; |
| |
| |
| if (unlikely(res_get(fh) < 0)) |
| return -EBUSY; |
| |
| return (videobuf_streamon(&fh->vb_vidq)); |
| } |
| |
| static int vidioc_streamoff(struct file *file, void *priv, |
| enum v4l2_buf_type type) |
| { |
| struct em28xx_fh *fh = priv; |
| struct em28xx *dev = fh->dev; |
| int rc; |
| |
| rc = check_dev(dev); |
| if (rc < 0) |
| return rc; |
| |
| if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
| return -EINVAL; |
| if (type != fh->type) |
| return -EINVAL; |
| |
| videobuf_streamoff(&fh->vb_vidq); |
| res_free(fh); |
| |
| return 0; |
| } |
| |
| static int vidioc_querycap(struct file *file, void *priv, |
| struct v4l2_capability *cap) |
| { |
| 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)); |
| strlcpy(cap->bus_info, dev->udev->dev.bus_id, sizeof(cap->bus_info)); |
| |
| cap->version = EM28XX_VERSION_CODE; |
| |
| cap->capabilities = |
| V4L2_CAP_SLICED_VBI_CAPTURE | |
| V4L2_CAP_VIDEO_CAPTURE | |
| V4L2_CAP_AUDIO | |
| V4L2_CAP_READWRITE | V4L2_CAP_STREAMING; |
| |
| if (dev->tuner_type != TUNER_ABSENT) |
| cap->capabilities |= V4L2_CAP_TUNER; |
| |
| return 0; |
| } |
| |
| static int vidioc_enum_fmt_cap(struct file *file, void *priv, |
| struct v4l2_fmtdesc *fmtd) |
| { |
| if (fmtd->index != 0) |
| return -EINVAL; |
| |
| fmtd->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
| strcpy(fmtd->description, "Packed YUY2"); |
| fmtd->pixelformat = V4L2_PIX_FMT_YUYV; |
| memset(fmtd->reserved, 0, sizeof(fmtd->reserved)); |
| |
| return 0; |
| } |
| |
| /* Sliced VBI ioctls */ |
| static int vidioc_g_fmt_vbi_capture(struct file *file, void *priv, |
| struct v4l2_format *f) |
| { |
| struct em28xx_fh *fh = priv; |
| struct em28xx *dev = fh->dev; |
| int rc; |
| |
| rc = check_dev(dev); |
| if (rc < 0) |
| return rc; |
| |
| mutex_lock(&dev->lock); |
| |
| f->fmt.sliced.service_set = 0; |
| |
| em28xx_i2c_call_clients(dev, VIDIOC_G_FMT, f); |
| |
| if (f->fmt.sliced.service_set == 0) |
| rc = -EINVAL; |
| |
| mutex_unlock(&dev->lock); |
| return rc; |
| } |
| |
| static int vidioc_try_set_vbi_capture(struct file *file, void *priv, |
| struct v4l2_format *f) |
| { |
| struct em28xx_fh *fh = priv; |
| struct em28xx *dev = fh->dev; |
| int rc; |
| |
| rc = check_dev(dev); |
| if (rc < 0) |
| return rc; |
| |
| mutex_lock(&dev->lock); |
| em28xx_i2c_call_clients(dev, VIDIOC_G_FMT, f); |
| mutex_unlock(&dev->lock); |
| |
| if (f->fmt.sliced.service_set == 0) |
| return -EINVAL; |
| |
| return 0; |
| } |
| |
| |
| static int vidioc_reqbufs(struct file *file, void *priv, |
| struct v4l2_requestbuffers *rb) |
| { |
| struct em28xx_fh *fh = priv; |
| struct em28xx *dev = fh->dev; |
| int rc; |
| |
| rc = check_dev(dev); |
| if (rc < 0) |
| return rc; |
| |
| return (videobuf_reqbufs(&fh->vb_vidq, rb)); |
| } |
| |
| static int vidioc_querybuf(struct file *file, void *priv, |
| struct v4l2_buffer *b) |
| { |
| struct em28xx_fh *fh = priv; |
| struct em28xx *dev = fh->dev; |
| int rc; |
| |
| rc = check_dev(dev); |
| if (rc < 0) |
| return rc; |
| |
| return (videobuf_querybuf(&fh->vb_vidq, b)); |
| } |
| |
| static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *b) |
| { |
| struct em28xx_fh *fh = priv; |
| struct em28xx *dev = fh->dev; |
| int rc; |
| |
| rc = check_dev(dev); |
| if (rc < 0) |
| return rc; |
| |
| return (videobuf_qbuf(&fh->vb_vidq, b)); |
| } |
| |
| static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *b) |
| { |
| struct em28xx_fh *fh = priv; |
| struct em28xx *dev = fh->dev; |
| int rc; |
| |
| rc = check_dev(dev); |
| if (rc < 0) |
| return rc; |
| |
| return (videobuf_dqbuf(&fh->vb_vidq, b, |
| file->f_flags & O_NONBLOCK)); |
| } |
| |
| #ifdef CONFIG_VIDEO_V4L1_COMPAT |
| static int vidiocgmbuf(struct file *file, void *priv, struct video_mbuf *mbuf) |
| { |
| struct em28xx_fh *fh = priv; |
| |
| return videobuf_cgmbuf(&fh->vb_vidq, mbuf, 8); |
| } |
| #endif |
| |
| |
| /* ----------------------------------------------------------- */ |
| /* RADIO ESPECIFIC IOCTLS */ |
| /* ----------------------------------------------------------- */ |
| |
| static int radio_querycap(struct file *file, void *priv, |
| struct v4l2_capability *cap) |
| { |
| struct em28xx *dev = ((struct em28xx_fh *)priv)->dev; |
| |
| strlcpy(cap->driver, "em28xx", sizeof(cap->driver)); |
| strlcpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card)); |
| strlcpy(cap->bus_info, dev->udev->dev.bus_id, sizeof(cap->bus_info)); |
| |
| cap->version = EM28XX_VERSION_CODE; |
| cap->capabilities = V4L2_CAP_TUNER; |
| return 0; |
| } |
| |
| 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"); |
| t->type = V4L2_TUNER_RADIO; |
| |
| em28xx_i2c_call_clients(dev, VIDIOC_G_TUNER, t); |
| return 0; |
| } |
| |
| static int radio_enum_input(struct file *file, void *priv, |
| struct v4l2_input *i) |
| { |
| if (i->index != 0) |
| return -EINVAL; |
| strcpy(i->name, "Radio"); |
| i->type = V4L2_INPUT_TYPE_TUNER; |
| |
| return 0; |
| } |
| |
| static int radio_g_audio(struct file *file, void *priv, struct v4l2_audio *a) |
| { |
| if (unlikely(a->index)) |
| return -EINVAL; |
| |
| strcpy(a->name, "Radio"); |
| return 0; |
| } |
| |
| static int radio_s_tuner(struct file *file, void *priv, |
| struct v4l2_tuner *t) |
| { |
| struct em28xx *dev = ((struct em28xx_fh *)priv)->dev; |
| |
| if (0 != t->index) |
| return -EINVAL; |
| |
| em28xx_i2c_call_clients(dev, VIDIOC_S_TUNER, t); |
| |
| return 0; |
| } |
| |
| static int radio_s_audio(struct file *file, void *fh, |
| struct v4l2_audio *a) |
| { |
| return 0; |
| } |
| |
| static int radio_s_input(struct file *file, void *fh, unsigned int i) |
| { |
| return 0; |
| } |
| |
| static int radio_queryctrl(struct file *file, void *priv, |
| struct v4l2_queryctrl *qc) |
| { |
| int i; |
| |
| if (qc->id < V4L2_CID_BASE || |
| qc->id >= V4L2_CID_LASTP1) |
| return -EINVAL; |
| |
| for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) { |
| if (qc->id && qc->id == em28xx_qctrl[i].id) { |
| memcpy(qc, &(em28xx_qctrl[i]), sizeof(*qc)); |
| return 0; |
| } |
| } |
| |
| return -EINVAL; |
| } |
| |
| /* |
| * em28xx_v4l2_open() |
| * inits the device and starts isoc transfer |
| */ |
| static int em28xx_v4l2_open(struct inode *inode, struct file *filp) |
| { |
| int minor = iminor(inode); |
| int errCode = 0, radio = 0; |
| struct em28xx *h,*dev = NULL; |
| struct em28xx_fh *fh; |
| enum v4l2_buf_type fh_type = 0; |
| |
| list_for_each_entry(h, &em28xx_devlist, devlist) { |
| if (h->vdev->minor == minor) { |
| dev = h; |
| fh_type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
| } |
| if (h->vbi_dev->minor == minor) { |
| dev = h; |
| fh_type = V4L2_BUF_TYPE_VBI_CAPTURE; |
| } |
| if (h->radio_dev && |
| h->radio_dev->minor == minor) { |
| radio = 1; |
| dev = h; |
| } |
| } |
| if (NULL == dev) |
| return -ENODEV; |
| |
| em28xx_videodbg("open minor=%d type=%s users=%d\n", |
| minor, v4l2_type_names[fh_type], dev->users); |
| |
| fh = kzalloc(sizeof(struct em28xx_fh), GFP_KERNEL); |
| |
| if (!fh) { |
| em28xx_errdev("em28xx-video.c: Out of memory?!\n"); |
| return -ENOMEM; |
| } |
| mutex_lock(&dev->lock); |
| fh->dev = dev; |
| fh->radio = radio; |
| fh->type = fh_type; |
| filp->private_data = fh; |
| |
| if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE && dev->users == 0) { |
| dev->width = norm_maxw(dev); |
| dev->height = norm_maxh(dev); |
| dev->frame_size = dev->width * dev->height * 2; |
| dev->field_size = dev->frame_size >> 1; /*both_fileds ? dev->frame_size>>1 : dev->frame_size; */ |
| dev->bytesperline = dev->width * 2; |
| dev->hscale = 0; |
| dev->vscale = 0; |
| |
| em28xx_set_alternate(dev); |
| em28xx_resolution_set(dev); |
| |
| } |
| if (fh->radio) { |
| em28xx_videodbg("video_open: setting radio device\n"); |
| em28xx_i2c_call_clients(dev, AUDC_SET_RADIO, NULL); |
| } |
| |
| dev->users++; |
| |
| videobuf_queue_vmalloc_init(&fh->vb_vidq, &em28xx_video_qops, |
| NULL, &dev->slock, fh->type, V4L2_FIELD_INTERLACED, |
| sizeof(struct em28xx_buffer), fh); |
| |
| mutex_unlock(&dev->lock); |
| return errCode; |
| } |
| |
| /* |
| * em28xx_realease_resources() |
| * unregisters the v4l2,i2c and usb devices |
| * called when the device gets disconected or at module unload |
| */ |
| static void em28xx_release_resources(struct em28xx *dev) |
| { |
| |
| /*FIXME: I2C IR should be disconnected */ |
| |
| em28xx_info("V4L2 devices /dev/video%d and /dev/vbi%d deregistered\n", |
| dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN, |
| dev->vbi_dev->minor-MINOR_VFL_TYPE_VBI_MIN); |
| list_del(&dev->devlist); |
| if (dev->radio_dev) { |
| if (-1 != dev->radio_dev->minor) |
| video_unregister_device(dev->radio_dev); |
| else |
| video_device_release(dev->radio_dev); |
| dev->radio_dev = NULL; |
| } |
| if (dev->vbi_dev) { |
| if (-1 != dev->vbi_dev->minor) |
| video_unregister_device(dev->vbi_dev); |
| else |
| video_device_release(dev->vbi_dev); |
| dev->vbi_dev = NULL; |
| } |
| if (dev->vdev) { |
| if (-1 != dev->vdev->minor) |
| video_unregister_device(dev->vdev); |
| else |
| video_device_release(dev->vdev); |
| dev->vdev = NULL; |
| } |
| em28xx_i2c_unregister(dev); |
| usb_put_dev(dev->udev); |
| |
| /* Mark device as unused */ |
| em28xx_devused&=~(1<<dev->devno); |
| } |
| |
| /* |
| * em28xx_v4l2_close() |
| * stops streaming and deallocates all resources allocated by the v4l2 calls and ioctls |
| */ |
| static int em28xx_v4l2_close(struct inode *inode, struct file *filp) |
| { |
| struct em28xx_fh *fh = filp->private_data; |
| struct em28xx *dev = fh->dev; |
| int errCode; |
| |
| em28xx_videodbg("users=%d\n", dev->users); |
| |
| |
| if (res_check(fh)) |
| res_free(fh); |
| |
| mutex_lock(&dev->lock); |
| |
| if (dev->users == 1) { |
| videobuf_stop(&fh->vb_vidq); |
| videobuf_mmap_free(&fh->vb_vidq); |
| |
| /* the device is already disconnect, |
| free the remaining resources */ |
| if (dev->state & DEV_DISCONNECTED) { |
| em28xx_release_resources(dev); |
| mutex_unlock(&dev->lock); |
| kfree(dev); |
| return 0; |
| } |
| |
| /* do this before setting alternate! */ |
| em28xx_uninit_isoc(dev); |
| |
| /* 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); |
| } |
| } |
| kfree(fh); |
| dev->users--; |
| wake_up_interruptible_nr(&dev->open, 1); |
| mutex_unlock(&dev->lock); |
| return 0; |
| } |
| |
| /* |
| * em28xx_v4l2_read() |
| * will allocate buffers when called for the first time |
| */ |
| static ssize_t |
| em28xx_v4l2_read(struct file *filp, char __user * buf, size_t count, |
| loff_t *pos) |
| { |
| struct em28xx_fh *fh = filp->private_data; |
| struct em28xx *dev = fh->dev; |
| int rc; |
| |
| rc = check_dev(dev); |
| if (rc < 0) |
| return rc; |
| |
| /* FIXME: read() is not prepared to allow changing the video |
| resolution while streaming. Seems a bug at em28xx_set_fmt |
| */ |
| |
| if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) { |
| if (unlikely(res_get(fh))) |
| return -EBUSY; |
| |
| return videobuf_read_stream(&fh->vb_vidq, buf, count, pos, 0, |
| filp->f_flags & O_NONBLOCK); |
| } |
| return 0; |
| } |
| |
| /* |
| * em28xx_v4l2_poll() |
| * will allocate buffers when called for the first time |
| */ |
| static unsigned int em28xx_v4l2_poll(struct file *filp, poll_table * wait) |
| { |
| struct em28xx_fh *fh = filp->private_data; |
| struct em28xx *dev = fh->dev; |
| int rc; |
| |
| rc = check_dev(dev); |
| if (rc < 0) |
| return rc; |
| |
| if (unlikely(res_get(fh) < 0)) |
| return POLLERR; |
| |
| if (V4L2_BUF_TYPE_VIDEO_CAPTURE != fh->type) |
| return POLLERR; |
| |
| return videobuf_poll_stream(filp, &fh->vb_vidq, wait); |
| } |
| |
| /* |
| * em28xx_v4l2_mmap() |
| */ |
| static int em28xx_v4l2_mmap(struct file *filp, struct vm_area_struct *vma) |
| { |
| struct em28xx_fh *fh = filp->private_data; |
| struct em28xx *dev = fh->dev; |
| int rc; |
| |
| if (unlikely(res_get(fh) < 0)) |
| return -EBUSY; |
| |
| rc = check_dev(dev); |
| if (rc < 0) |
| return rc; |
| |
| rc = videobuf_mmap_mapper(&fh->vb_vidq, vma); |
| |
| em28xx_videodbg("vma start=0x%08lx, size=%ld, ret=%d\n", |
| (unsigned long)vma->vm_start, |
| (unsigned long)vma->vm_end-(unsigned long)vma->vm_start, |
| rc); |
| |
| return rc; |
| } |
| |
| static const struct file_operations em28xx_v4l_fops = { |
| .owner = THIS_MODULE, |
| .open = em28xx_v4l2_open, |
| .release = em28xx_v4l2_close, |
| .read = em28xx_v4l2_read, |
| .poll = em28xx_v4l2_poll, |
| .mmap = em28xx_v4l2_mmap, |
| .ioctl = video_ioctl2, |
| .llseek = no_llseek, |
| .compat_ioctl = v4l_compat_ioctl32, |
| }; |
| |
| static const struct file_operations radio_fops = { |
| .owner = THIS_MODULE, |
| .open = em28xx_v4l2_open, |
| .release = em28xx_v4l2_close, |
| .ioctl = video_ioctl2, |
| .compat_ioctl = v4l_compat_ioctl32, |
| .llseek = no_llseek, |
| }; |
| |
| static const struct video_device em28xx_video_template = { |
| .fops = &em28xx_v4l_fops, |
| .release = video_device_release, |
| |
| .minor = -1, |
| .vidioc_querycap = vidioc_querycap, |
| .vidioc_enum_fmt_cap = vidioc_enum_fmt_cap, |
| .vidioc_g_fmt_cap = vidioc_g_fmt_cap, |
| .vidioc_try_fmt_cap = vidioc_try_fmt_cap, |
| .vidioc_s_fmt_cap = vidioc_s_fmt_cap, |
| .vidioc_g_audio = vidioc_g_audio, |
| .vidioc_s_audio = vidioc_s_audio, |
| .vidioc_cropcap = vidioc_cropcap, |
| |
| .vidioc_g_fmt_vbi_capture = vidioc_g_fmt_vbi_capture, |
| .vidioc_try_fmt_vbi_capture = vidioc_try_set_vbi_capture, |
| .vidioc_s_fmt_vbi_capture = vidioc_try_set_vbi_capture, |
| |
| .vidioc_reqbufs = vidioc_reqbufs, |
| .vidioc_querybuf = vidioc_querybuf, |
| .vidioc_qbuf = vidioc_qbuf, |
| .vidioc_dqbuf = vidioc_dqbuf, |
| .vidioc_s_std = vidioc_s_std, |
| .vidioc_enum_input = vidioc_enum_input, |
| .vidioc_g_input = vidioc_g_input, |
| .vidioc_s_input = vidioc_s_input, |
| .vidioc_queryctrl = vidioc_queryctrl, |
| .vidioc_g_ctrl = vidioc_g_ctrl, |
| .vidioc_s_ctrl = vidioc_s_ctrl, |
| .vidioc_streamon = vidioc_streamon, |
| .vidioc_streamoff = vidioc_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, |
| #ifdef CONFIG_VIDEO_ADV_DEBUG |
| .vidioc_g_register = vidioc_g_register, |
| .vidioc_s_register = vidioc_s_register, |
| #endif |
| #ifdef CONFIG_VIDEO_V4L1_COMPAT |
| .vidiocgmbuf = vidiocgmbuf, |
| #endif |
| |
| .tvnorms = V4L2_STD_ALL, |
| .current_norm = V4L2_STD_PAL, |
| }; |
| |
| static struct video_device em28xx_radio_template = { |
| .name = "em28xx-radio", |
| .type = VID_TYPE_TUNER, |
| .fops = &radio_fops, |
| .minor = -1, |
| .vidioc_querycap = radio_querycap, |
| .vidioc_g_tuner = radio_g_tuner, |
| .vidioc_enum_input = radio_enum_input, |
| .vidioc_g_audio = radio_g_audio, |
| .vidioc_s_tuner = radio_s_tuner, |
| .vidioc_s_audio = radio_s_audio, |
| .vidioc_s_input = radio_s_input, |
| .vidioc_queryctrl = radio_queryctrl, |
| .vidioc_g_ctrl = vidioc_g_ctrl, |
| .vidioc_s_ctrl = vidioc_s_ctrl, |
| .vidioc_g_frequency = vidioc_g_frequency, |
| .vidioc_s_frequency = vidioc_s_frequency, |
| #ifdef CONFIG_VIDEO_ADV_DEBUG |
| .vidioc_g_register = vidioc_g_register, |
| .vidioc_s_register = vidioc_s_register, |
| #endif |
| }; |
| |
| /******************************** usb interface *****************************************/ |
| |
| |
| static LIST_HEAD(em28xx_extension_devlist); |
| static DEFINE_MUTEX(em28xx_extension_devlist_lock); |
| |
| int em28xx_register_extension(struct em28xx_ops *ops) |
| { |
| struct em28xx *h, *dev = NULL; |
| |
| list_for_each_entry(h, &em28xx_devlist, devlist) |
| dev = h; |
| |
| mutex_lock(&em28xx_extension_devlist_lock); |
| list_add_tail(&ops->next, &em28xx_extension_devlist); |
| if (dev) |
| ops->init(dev); |
| |
| printk(KERN_INFO "Em28xx: Initialized (%s) extension\n", ops->name); |
| mutex_unlock(&em28xx_extension_devlist_lock); |
| |
| return 0; |
| } |
| EXPORT_SYMBOL(em28xx_register_extension); |
| |
| void em28xx_unregister_extension(struct em28xx_ops *ops) |
| { |
| struct em28xx *h, *dev = NULL; |
| |
| list_for_each_entry(h, &em28xx_devlist, devlist) |
| dev = h; |
| |
| if (dev) |
| ops->fini(dev); |
| |
| mutex_lock(&em28xx_extension_devlist_lock); |
| printk(KERN_INFO "Em28xx: Removed (%s) extension\n", ops->name); |
| list_del(&ops->next); |
| mutex_unlock(&em28xx_extension_devlist_lock); |
| } |
| EXPORT_SYMBOL(em28xx_unregister_extension); |
| |
| static struct video_device *em28xx_vdev_init(struct em28xx *dev, |
| const struct video_device *template, |
| const int type, |
| const char *type_name) |
| { |
| struct video_device *vfd; |
| |
| vfd = video_device_alloc(); |
| if (NULL == vfd) |
| return NULL; |
| *vfd = *template; |
| vfd->minor = -1; |
| vfd->dev = &dev->udev->dev; |
| vfd->release = video_device_release; |
| vfd->type = type; |
| |
| snprintf(vfd->name, sizeof(vfd->name), "%s %s", |
| dev->name, type_name); |
| |
| return vfd; |
| } |
| |
| |
| /* |
| * em28xx_init_dev() |
| * allocates and inits the device structs, registers i2c bus and v4l device |
| */ |
| static int em28xx_init_dev(struct em28xx **devhandle, struct usb_device *udev, |
| int minor) |
| { |
| struct em28xx_ops *ops = NULL; |
| struct em28xx *dev = *devhandle; |
| int retval = -ENOMEM; |
| int errCode; |
| unsigned int maxh, maxw; |
| |
| dev->udev = udev; |
| mutex_init(&dev->lock); |
| spin_lock_init(&dev->slock); |
| init_waitqueue_head(&dev->open); |
| init_waitqueue_head(&dev->wait_frame); |
| init_waitqueue_head(&dev->wait_stream); |
| |
| dev->em28xx_write_regs = em28xx_write_regs; |
| dev->em28xx_read_reg = em28xx_read_reg; |
| dev->em28xx_read_reg_req_len = em28xx_read_reg_req_len; |
| dev->em28xx_write_regs_req = em28xx_write_regs_req; |
| dev->em28xx_read_reg_req = em28xx_read_reg_req; |
| dev->is_em2800 = em28xx_boards[dev->model].is_em2800; |
| |
| errCode = em28xx_read_reg(dev, CHIPID_REG); |
| if (errCode >= 0) |
| em28xx_info("em28xx chip ID = %d\n", errCode); |
| |
| em28xx_pre_card_setup(dev); |
| |
| errCode = em28xx_config(dev); |
| if (errCode) { |
| em28xx_errdev("error configuring device\n"); |
| em28xx_devused &= ~(1<<dev->devno); |
| kfree(dev); |
| return -ENOMEM; |
| } |
| |
| /* register i2c bus */ |
| em28xx_i2c_register(dev); |
| |
| /* Do board specific init and eeprom reading */ |
| em28xx_card_setup(dev); |
| |
| /* Configure audio */ |
| em28xx_audio_analog_set(dev); |
| |
| /* configure the device */ |
| em28xx_config_i2c(dev); |
| |
| /* set default norm */ |
| dev->norm = em28xx_video_template.current_norm; |
| |
| maxw = norm_maxw(dev); |
| maxh = norm_maxh(dev); |
| |
| /* set default image size */ |
| dev->width = maxw; |
| dev->height = maxh; |
| dev->interlaced = EM28XX_INTERLACED_DEFAULT; |
| dev->field_size = dev->width * dev->height; |
| dev->frame_size = |
| dev->interlaced ? dev->field_size << 1 : dev->field_size; |
| dev->bytesperline = dev->width * 2; |
| dev->hscale = 0; |
| dev->vscale = 0; |
| dev->ctl_input = 2; |
| |
| errCode = em28xx_config(dev); |
| |
| list_add_tail(&dev->devlist, &em28xx_devlist); |
| |
| /* allocate and fill video video_device struct */ |
| dev->vdev = em28xx_vdev_init(dev, &em28xx_video_template, |
| VID_TYPE_CAPTURE, "video"); |
| if (NULL == dev->vdev) { |
| em28xx_errdev("cannot allocate video_device.\n"); |
| goto fail_unreg; |
| } |
| if (dev->tuner_type != TUNER_ABSENT) |
| dev->vdev->type |= VID_TYPE_TUNER; |
| |
| /* register v4l2 video video_device */ |
| retval = video_register_device(dev->vdev, VFL_TYPE_GRABBER, |
| video_nr[dev->devno]); |
| if (retval) { |
| em28xx_errdev("unable to register video device (error=%i).\n", |
| retval); |
| goto fail_unreg; |
| } |
| |
| /* Allocate and fill vbi video_device struct */ |
| dev->vbi_dev = em28xx_vdev_init(dev, &em28xx_video_template, |
| VFL_TYPE_VBI, "vbi"); |
| /* register v4l2 vbi video_device */ |
| if (video_register_device(dev->vbi_dev, VFL_TYPE_VBI, |
| vbi_nr[dev->devno]) < 0) { |
| em28xx_errdev("unable to register vbi device\n"); |
| retval = -ENODEV; |
| goto fail_unreg; |
| } |
| |
| if (em28xx_boards[dev->model].radio.type == EM28XX_RADIO) { |
| dev->radio_dev = em28xx_vdev_init(dev, &em28xx_radio_template, |
| VFL_TYPE_RADIO, "radio"); |
| if (NULL == dev->radio_dev) { |
| em28xx_errdev("cannot allocate video_device.\n"); |
| goto fail_unreg; |
| } |
| retval = video_register_device(dev->radio_dev, VFL_TYPE_RADIO, |
| radio_nr[dev->devno]); |
| if (retval < 0) { |
| em28xx_errdev("can't register radio device\n"); |
| goto fail_unreg; |
| } |
| em28xx_info("Registered radio device as /dev/radio%d\n", |
| dev->radio_dev->minor & 0x1f); |
| } |
| |
| /* init video dma queues */ |
| INIT_LIST_HEAD(&dev->vidq.active); |
| INIT_LIST_HEAD(&dev->vidq.queued); |
| |
| dev->vidq.timeout.function = em28xx_vid_timeout; |
| dev->vidq.timeout.data = (unsigned long)dev; |
| init_timer(&dev->vidq.timeout); |
| |
| |
| if (dev->has_msp34xx) { |
| /* Send a reset to other chips via gpio */ |
| em28xx_write_regs_req(dev, 0x00, 0x08, "\xf7", 1); |
| msleep(3); |
| em28xx_write_regs_req(dev, 0x00, 0x08, "\xff", 1); |
| msleep(3); |
| } |
| |
| video_mux(dev, 0); |
| |
| em28xx_info("V4L2 device registered as /dev/video%d and /dev/vbi%d\n", |
| dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN, |
| dev->vbi_dev->minor-MINOR_VFL_TYPE_VBI_MIN); |
| |
| mutex_lock(&em28xx_extension_devlist_lock); |
| if (!list_empty(&em28xx_extension_devlist)) { |
| list_for_each_entry(ops, &em28xx_extension_devlist, next) { |
| if (ops->id) |
| ops->init(dev); |
| } |
| } |
| mutex_unlock(&em28xx_extension_devlist_lock); |
| |
| return 0; |
| |
| fail_unreg: |
| em28xx_release_resources(dev); |
| mutex_unlock(&dev->lock); |
| kfree(dev); |
| return retval; |
| } |
| |
| #if defined(CONFIG_MODULES) && defined(MODULE) |
| static void request_module_async(struct work_struct *work) |
| { |
| struct em28xx *dev = container_of(work, |
| struct em28xx, request_module_wk); |
| |
| if (dev->has_audio_class) |
| request_module("snd-usb-audio"); |
| else |
| request_module("em28xx-alsa"); |
| } |
| |
| static void request_modules(struct em28xx *dev) |
| { |
| INIT_WORK(&dev->request_module_wk, request_module_async); |
| schedule_work(&dev->request_module_wk); |
| } |
| #else |
| #define request_modules(dev) |
| #endif /* CONFIG_MODULES */ |
| |
| /* |
| * em28xx_usb_probe() |
| * checks for supported devices |
| */ |
| static int em28xx_usb_probe(struct usb_interface *interface, |
| const struct usb_device_id *id) |
| { |
| const struct usb_endpoint_descriptor *endpoint; |
| struct usb_device *udev; |
| struct usb_interface *uif; |
| struct em28xx *dev = NULL; |
| int retval = -ENODEV; |
| int i, nr, ifnum; |
| |
| udev = usb_get_dev(interface_to_usbdev(interface)); |
| ifnum = interface->altsetting[0].desc.bInterfaceNumber; |
| |
| /* Check to see next free device and mark as used */ |
| nr=find_first_zero_bit(&em28xx_devused,EM28XX_MAXBOARDS); |
| em28xx_devused|=1<<nr; |
| |
| /* Don't register audio interfaces */ |
| if (interface->altsetting[0].desc.bInterfaceClass == USB_CLASS_AUDIO) { |
| em28xx_err(DRIVER_NAME " audio device (%04x:%04x): interface %i, class %i\n", |
| udev->descriptor.idVendor,udev->descriptor.idProduct, |
| ifnum, |
| interface->altsetting[0].desc.bInterfaceClass); |
| |
| em28xx_devused&=~(1<<nr); |
| return -ENODEV; |
| } |
| |
| em28xx_err(DRIVER_NAME " new video device (%04x:%04x): interface %i, class %i\n", |
| udev->descriptor.idVendor,udev->descriptor.idProduct, |
| ifnum, |
| interface->altsetting[0].desc.bInterfaceClass); |
| |
| endpoint = &interface->cur_altsetting->endpoint[1].desc; |
| |
| /* check if the device has the iso in endpoint at the correct place */ |
| if ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != |
| USB_ENDPOINT_XFER_ISOC) { |
| em28xx_err(DRIVER_NAME " probing error: endpoint is non-ISO endpoint!\n"); |
| em28xx_devused&=~(1<<nr); |
| return -ENODEV; |
| } |
| if ((endpoint->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT) { |
| em28xx_err(DRIVER_NAME " probing error: endpoint is ISO OUT endpoint!\n"); |
| em28xx_devused&=~(1<<nr); |
| return -ENODEV; |
| } |
| |
| if (nr >= EM28XX_MAXBOARDS) { |
| printk (DRIVER_NAME ": Supports only %i em28xx boards.\n",EM28XX_MAXBOARDS); |
| em28xx_devused&=~(1<<nr); |
| return -ENOMEM; |
| } |
| |
| /* allocate memory for our device state and initialize it */ |
| dev = kzalloc(sizeof(*dev), GFP_KERNEL); |
| if (dev == NULL) { |
| em28xx_err(DRIVER_NAME ": out of memory!\n"); |
| em28xx_devused&=~(1<<nr); |
| return -ENOMEM; |
| } |
| |
| snprintf(dev->name, 29, "em28xx #%d", nr); |
| dev->devno = nr; |
| dev->model = id->driver_info; |
| dev->alt = -1; |
| |
| /* Checks if audio is provided by some interface */ |
| for (i = 0; i < udev->config->desc.bNumInterfaces; i++) { |
| uif = udev->config->interface[i]; |
| if (uif->altsetting[0].desc.bInterfaceClass == USB_CLASS_AUDIO) { |
| dev->has_audio_class = 1; |
| break; |
| } |
| } |
| |
| printk(KERN_INFO DRIVER_NAME " %s usb audio class\n", |
| dev->has_audio_class ? "Has" : "Doesn't have"); |
| |
| /* compute alternate max packet sizes */ |
| uif = udev->actconfig->interface[0]; |
| |
| dev->num_alt=uif->num_altsetting; |
| em28xx_info("Alternate settings: %i\n",dev->num_alt); |
| // dev->alt_max_pkt_size = kmalloc(sizeof(*dev->alt_max_pkt_size)* |
| dev->alt_max_pkt_size = kmalloc(32* |
| dev->num_alt,GFP_KERNEL); |
| if (dev->alt_max_pkt_size == NULL) { |
| em28xx_errdev("out of memory!\n"); |
| em28xx_devused&=~(1<<nr); |
| kfree(dev); |
| return -ENOMEM; |
| } |
| |
| for (i = 0; i < dev->num_alt ; i++) { |
| u16 tmp = le16_to_cpu(uif->altsetting[i].endpoint[1].desc. |
| wMaxPacketSize); |
| dev->alt_max_pkt_size[i] = |
| (tmp & 0x07ff) * (((tmp & 0x1800) >> 11) + 1); |
| em28xx_info("Alternate setting %i, max size= %i\n",i, |
| dev->alt_max_pkt_size[i]); |
| } |
| |
| if ((card[nr]>=0)&&(card[nr]<em28xx_bcount)) |
| dev->model = card[nr]; |
| |
| /* allocate device struct */ |
| retval = em28xx_init_dev(&dev, udev, nr); |
| if (retval) |
| return retval; |
| |
| em28xx_info("Found %s\n", em28xx_boards[dev->model].name); |
| |
| /* save our data pointer in this interface device */ |
| usb_set_intfdata(interface, dev); |
| |
| request_modules(dev); |
| |
| return 0; |
| } |
| |
| /* |
| * em28xx_usb_disconnect() |
| * called when the device gets diconencted |
| * video device will be unregistered on v4l2_close in case it is still open |
| */ |
| static void em28xx_usb_disconnect(struct usb_interface *interface) |
| { |
| struct em28xx *dev; |
| struct em28xx_ops *ops = NULL; |
| |
| dev = usb_get_intfdata(interface); |
| usb_set_intfdata(interface, NULL); |
| |
| if (!dev) |
| return; |
| |
| em28xx_info("disconnecting %s\n", dev->vdev->name); |
| |
| /* wait until all current v4l2 io is finished then deallocate resources */ |
| mutex_lock(&dev->lock); |
| |
| wake_up_interruptible_all(&dev->open); |
| |
| if (dev->users) { |
| em28xx_warn |
| ("device /dev/video%d is open! Deregistration and memory " |
| "deallocation are deferred on close.\n", |
| dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN); |
| |
| dev->state |= DEV_MISCONFIGURED; |
| em28xx_uninit_isoc(dev); |
| dev->state |= DEV_DISCONNECTED; |
| wake_up_interruptible(&dev->wait_frame); |
| wake_up_interruptible(&dev->wait_stream); |
| } else { |
| dev->state |= DEV_DISCONNECTED; |
| em28xx_release_resources(dev); |
| } |
| mutex_unlock(&dev->lock); |
| |
| mutex_lock(&em28xx_extension_devlist_lock); |
| if (!list_empty(&em28xx_extension_devlist)) { |
| list_for_each_entry(ops, &em28xx_extension_devlist, next) { |
| ops->fini(dev); |
| } |
| } |
| mutex_unlock(&em28xx_extension_devlist_lock); |
| |
| if (!dev->users) { |
| kfree(dev->alt_max_pkt_size); |
| kfree(dev); |
| } |
| } |
| |
| static struct usb_driver em28xx_usb_driver = { |
| .name = "em28xx", |
| .probe = em28xx_usb_probe, |
| .disconnect = em28xx_usb_disconnect, |
| .id_table = em28xx_id_table, |
| }; |
| |
| static int __init em28xx_module_init(void) |
| { |
| int result; |
| |
| printk(KERN_INFO DRIVER_NAME " v4l2 driver version %d.%d.%d loaded\n", |
| (EM28XX_VERSION_CODE >> 16) & 0xff, |
| (EM28XX_VERSION_CODE >> 8) & 0xff, EM28XX_VERSION_CODE & 0xff); |
| #ifdef SNAPSHOT |
| printk(KERN_INFO DRIVER_NAME " snapshot date %04d-%02d-%02d\n", |
| SNAPSHOT / 10000, (SNAPSHOT / 100) % 100, SNAPSHOT % 100); |
| #endif |
| |
| /* register this driver with the USB subsystem */ |
| result = usb_register(&em28xx_usb_driver); |
| if (result) |
| em28xx_err(DRIVER_NAME |
| " usb_register failed. Error number %d.\n", result); |
| |
| return result; |
| } |
| |
| static void __exit em28xx_module_exit(void) |
| { |
| /* deregister this driver with the USB subsystem */ |
| usb_deregister(&em28xx_usb_driver); |
| } |
| |
| module_init(em28xx_module_init); |
| module_exit(em28xx_module_exit); |