/* #define ENABLE_DEBUG_ISOC_FRAMES */
-static unsigned int core_debug = 0;
+static unsigned int core_debug;
module_param(core_debug,int,0644);
MODULE_PARM_DESC(core_debug,"enable debug messages [core]");
#define em28xx_coredbg(fmt, arg...) do {\
if (core_debug) \
printk(KERN_INFO "%s %s :"fmt, \
- dev->name, __FUNCTION__ , ##arg); } while (0)
+ dev->name, __func__ , ##arg); } while (0)
-static unsigned int reg_debug = 0;
+static unsigned int reg_debug;
module_param(reg_debug,int,0644);
MODULE_PARM_DESC(reg_debug,"enable debug messages [URB reg]");
#define em28xx_regdbg(fmt, arg...) do {\
if (reg_debug) \
printk(KERN_INFO "%s %s :"fmt, \
- dev->name, __FUNCTION__ , ##arg); } while (0)
-
-static unsigned int isoc_debug = 0;
-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, __FUNCTION__ , ##arg); } while (0)
+ dev->name, __func__ , ##arg); } while (0)
static int alt = EM28XX_PINOUT;
module_param(alt, int, 0644);
MODULE_PARM_DESC(alt, "alternate setting to use for video endpoint");
-
-/*
- * em28xx_request_buffers()
- * allocate a number of buffers
- */
-u32 em28xx_request_buffers(struct em28xx *dev, u32 count)
-{
- const size_t imagesize = PAGE_ALIGN(dev->frame_size); /*needs to be page aligned cause the buffers can be mapped individually! */
- void *buff = NULL;
- u32 i;
- em28xx_coredbg("requested %i buffers with size %zi\n",
- count, imagesize);
- if (count > EM28XX_NUM_FRAMES)
- count = EM28XX_NUM_FRAMES;
-
- dev->num_frames = count;
- while (dev->num_frames > 0) {
- if ((buff = vmalloc_32(dev->num_frames * imagesize))) {
- memset(buff, 0, dev->num_frames * imagesize);
- break;
- }
- dev->num_frames--;
- }
-
- for (i = 0; i < dev->num_frames; i++) {
- dev->frame[i].bufmem = buff + i * imagesize;
- dev->frame[i].buf.index = i;
- dev->frame[i].buf.m.offset = i * imagesize;
- dev->frame[i].buf.length = dev->frame_size;
- dev->frame[i].buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
- dev->frame[i].buf.sequence = 0;
- dev->frame[i].buf.field = V4L2_FIELD_NONE;
- dev->frame[i].buf.memory = V4L2_MEMORY_MMAP;
- dev->frame[i].buf.flags = 0;
- }
- return dev->num_frames;
-}
-
-/*
- * em28xx_queue_unusedframes()
- * add all frames that are not currently in use to the inbuffer queue
- */
-void em28xx_queue_unusedframes(struct em28xx *dev)
-{
- unsigned long lock_flags;
- u32 i;
-
- for (i = 0; i < dev->num_frames; i++)
- if (dev->frame[i].state == F_UNUSED) {
- dev->frame[i].state = F_QUEUED;
- spin_lock_irqsave(&dev->queue_lock, lock_flags);
- list_add_tail(&dev->frame[i].frame, &dev->inqueue);
- spin_unlock_irqrestore(&dev->queue_lock, lock_flags);
- }
-}
-
-/*
- * em28xx_release_buffers()
- * free frame buffers
- */
-void em28xx_release_buffers(struct em28xx *dev)
-{
- if (dev->num_frames) {
- vfree(dev->frame[0].bufmem);
- dev->num_frames = 0;
- }
-}
+/* FIXME */
+#define em28xx_isocdbg(fmt, arg...) do {\
+ if (core_debug) \
+ printk(KERN_INFO "%s %s :"fmt, \
+ dev->name, __func__ , ##arg); } while (0)
/*
* em28xx_read_reg_req()
USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
0x0000, reg, buf, len, HZ);
- if (reg_debug){
+ if (reg_debug) {
printk(ret < 0 ? " failed!\n" : "%02x values: ", ret);
- for (byte = 0; byte < len; byte++) {
- printk(" %02x", (unsigned char)buf[byte]);
- }
- printk("\n");
+ for (byte = 0; byte < len; byte++)
+ printk(KERN_INFO " %02x", (unsigned char)buf[byte]);
+
+ printk(KERN_INFO "\n");
}
return ret;
if (reg_debug) {
int i;
for (i = 0; i < len; ++i)
- printk (" %02x", (unsigned char)buf[i]);
- printk ("\n");
+ printk(KERN_INFO " %02x", (unsigned char)buf[i]);
+ printk(KERN_INFO "\n");
}
if (!bufs)
{
int oldval;
u8 newval;
- if ((oldval = em28xx_read_reg(dev, reg)) < 0)
+
+ oldval = em28xx_read_reg(dev, reg);
+
+ if (oldval < 0)
return oldval;
+
newval = (((u8) oldval) & ~bitmask) | (val & bitmask);
return em28xx_write_regs(dev, reg, &newval, 1);
}
{
int ret, i;
u8 addr = reg & 0x7f;
- if ((ret = em28xx_write_regs(dev, AC97LSB_REG, val, 2)) < 0)
+
+ ret = em28xx_write_regs(dev, AC97LSB_REG, val, 2);
+ if (ret < 0)
return ret;
- if ((ret = em28xx_write_regs(dev, AC97ADDR_REG, &addr, 1)) < 0)
+
+ ret = em28xx_write_regs(dev, AC97ADDR_REG, &addr, 1);
+ if (ret < 0)
return ret;
/* Wait up to 50 ms for AC97 command to complete */
for (i = 0; i < 10; i++) {
- if ((ret = em28xx_read_reg(dev, AC97BUSY_REG)) < 0)
+ ret = em28xx_read_reg(dev, AC97BUSY_REG);
+ if (ret < 0)
return ret;
- if (!((u8) ret) & 0x01)
+
+ if (!(ret & 0x01))
return 0;
msleep(5);
}
- em28xx_warn ("AC97 command still being executed: not handled properly!\n");
+ em28xx_warn("AC97 command still being executed: not handled properly!\n");
return 0;
}
int em28xx_capture_start(struct em28xx *dev, int start)
{
- int ret;
+ int rc;
/* FIXME: which is the best order? */
/* video registers are sampled by VREF */
- if ((ret = em28xx_write_reg_bits(dev, USBSUSP_REG, start ? 0x10 : 0x00,
- 0x10)) < 0)
- return ret;
+ rc = em28xx_write_reg_bits(dev, USBSUSP_REG,
+ start ? 0x10 : 0x00, 0x10);
+ if (rc < 0)
+ return rc;
+
+ if (!start) {
+ /* disable video capture */
+ rc = em28xx_write_regs(dev, VINENABLE_REG, "\x27", 1);
+ return rc;
+ }
+
/* enable video capture */
- return em28xx_write_regs(dev, VINENABLE_REG, start ? "\x67" : "\x27", 1);
+ rc = em28xx_write_regs_req(dev, 0x00, 0x48, "\x00", 1);
+
+ if (dev->mode == EM28XX_ANALOG_MODE)
+ rc = em28xx_write_regs(dev, VINENABLE_REG, "\x67", 1);
+ else
+ rc = em28xx_write_regs(dev, VINENABLE_REG, "\x37", 1);
+
+ msleep(6);
+
+ return rc;
}
int em28xx_outfmt_set_yuv422(struct em28xx *dev)
static int em28xx_accumulator_set(struct em28xx *dev, u8 xmin, u8 xmax,
u8 ymin, u8 ymax)
{
- em28xx_coredbg("em28xx Scale: (%d,%d)-(%d,%d)\n", xmin, ymin, xmax, ymax);
+ em28xx_coredbg("em28xx Scale: (%d,%d)-(%d,%d)\n",
+ xmin, ymin, xmax, ymax);
em28xx_write_regs(dev, XMIN_REG, &xmin, 1);
em28xx_write_regs(dev, XMAX_REG, &xmax, 1);
u8 cheight = height;
u8 overflow = (height >> 7 & 0x02) | (width >> 8 & 0x01);
- em28xx_coredbg("em28xx Area Set: (%d,%d)\n", (width | (overflow & 2) << 7),
+ em28xx_coredbg("em28xx Area Set: (%d,%d)\n",
+ (width | (overflow & 2) << 7),
(height | (overflow & 1) << 8));
em28xx_write_regs(dev, HSTART_REG, &hstart, 1);
{
u8 mode;
/* the em2800 scaler only supports scaling down to 50% */
- if(dev->is_em2800)
+ if (dev->is_em2800)
mode = (v ? 0x20 : 0x00) | (h ? 0x10 : 0x00);
else {
u8 buf[2];
buf[0] = v;
buf[1] = v >> 8;
em28xx_write_regs(dev, VSCALELOW_REG, (char *)buf, 2);
- /* it seems that both H and V scalers must be active to work correctly */
+ /* it seems that both H and V scalers must be active
+ to work correctly */
mode = (h || v)? 0x30: 0x00;
}
return em28xx_write_reg_bits(dev, COMPR_REG, mode, 0x30);
return em28xx_scaler_set(dev, dev->hscale, dev->vscale);
}
-
-/******************* isoc transfer handling ****************************/
-
-#ifdef ENABLE_DEBUG_ISOC_FRAMES
-static void em28xx_isoc_dump(struct urb *urb)
+int em28xx_set_alternate(struct em28xx *dev)
{
- int len = 0;
- int ntrans = 0;
+ int errCode, prev_alt = dev->alt;
int i;
+ unsigned int min_pkt_size = dev->width * 2 + 4;
- printk(KERN_DEBUG "isocIrq: sf=%d np=%d ec=%x\n",
- urb->start_frame, urb->number_of_packets,
- urb->error_count);
- for (i = 0; i < urb->number_of_packets; i++) {
- unsigned char *buf =
- urb->transfer_buffer +
- urb->iso_frame_desc[i].offset;
- int alen = urb->iso_frame_desc[i].actual_length;
- if (alen > 0) {
- if (buf[0] == 0x88) {
- ntrans++;
- len += alen;
- } else if (buf[0] == 0x22) {
- printk(KERN_DEBUG
- "= l=%d nt=%d bpp=%d\n",
- len - 4 * ntrans, ntrans,
- ntrans == 0 ? 0 : len / ntrans);
- ntrans = 1;
- len = alen;
- } else
- printk(KERN_DEBUG "!\n");
- }
- printk(KERN_DEBUG " n=%d s=%d al=%d %x\n", i,
- urb->iso_frame_desc[i].status,
- urb->iso_frame_desc[i].actual_length,
- (unsigned int)
- *((unsigned char *)(urb->transfer_buffer +
- urb->iso_frame_desc[i].
- offset)));
+ /* When image size is bigger than a certain value,
+ the frame size should be increased, otherwise, only
+ green screen will be received.
+ */
+ if (dev->width * 2 * dev->height > 720 * 240 * 2)
+ min_pkt_size *= 2;
+
+ for (i = 0; i < dev->num_alt; i++) {
+ /* stop when the selected alt setting offers enough bandwidth */
+ if (dev->alt_max_pkt_size[i] >= min_pkt_size) {
+ dev->alt = i;
+ break;
+ /* otherwise make sure that we end up with the maximum bandwidth
+ because the min_pkt_size equation might be wrong...
+ */
+ } else if (dev->alt_max_pkt_size[i] >
+ dev->alt_max_pkt_size[dev->alt])
+ dev->alt = i;
}
-}
-#endif
-static inline int em28xx_isoc_video(struct em28xx *dev,struct em28xx_frame_t **f,
- unsigned long *lock_flags, unsigned char buf)
-{
- if (!(buf & 0x01)) {
- if ((*f)->state == F_GRABBING) {
- /*previous frame is incomplete */
- if ((*f)->fieldbytesused < dev->field_size) {
- (*f)->state = F_ERROR;
- em28xx_isocdbg ("dropping incomplete bottom field (%i missing bytes)",
- dev->field_size-(*f)->fieldbytesused);
- } else {
- (*f)->state = F_DONE;
- (*f)->buf.bytesused = dev->frame_size;
- }
- }
- if ((*f)->state == F_DONE || (*f)->state == F_ERROR) {
- /* move current frame to outqueue and get next free buffer from inqueue */
- spin_lock_irqsave(&dev-> queue_lock, *lock_flags);
- list_move_tail(&(*f)->frame, &dev->outqueue);
- if (!list_empty(&dev->inqueue))
- (*f) = list_entry(dev-> inqueue.next,
- struct em28xx_frame_t,frame);
- else
- (*f) = NULL;
- spin_unlock_irqrestore(&dev->queue_lock,*lock_flags);
- }
- if (!(*f)) {
- em28xx_isocdbg ("new frame but no buffer is free");
- return -1;
- }
- do_gettimeofday(&(*f)->buf.timestamp);
- (*f)->buf.sequence = ++dev->frame_count;
- (*f)->buf.field = V4L2_FIELD_INTERLACED;
- (*f)->state = F_GRABBING;
- (*f)->buf.bytesused = 0;
- (*f)->top_field = 1;
- (*f)->fieldbytesused = 0;
- } else {
- /* acquiring bottom field */
- if ((*f)->state == F_GRABBING) {
- if (!(*f)->top_field) {
- (*f)->state = F_ERROR;
- em28xx_isocdbg ("unexpected begin of bottom field; discarding it");
- } else if ((*f)-> fieldbytesused < dev->field_size - 172) {
- (*f)->state = F_ERROR;
- em28xx_isocdbg ("dropping incomplete top field (%i missing bytes)",
- dev->field_size-(*f)->fieldbytesused);
- } else {
- (*f)->top_field = 0;
- (*f)->fieldbytesused = 0;
- }
+ if (dev->alt != prev_alt) {
+ em28xx_coredbg("minimum isoc packet size: %u (alt=%d)\n",
+ min_pkt_size, dev->alt);
+ dev->max_pkt_size = dev->alt_max_pkt_size[dev->alt];
+ em28xx_coredbg("setting alternate %d with wMaxPacketSize=%u\n",
+ dev->alt, dev->max_pkt_size);
+ errCode = usb_set_interface(dev->udev, 0, dev->alt);
+ if (errCode < 0) {
+ em28xx_errdev("cannot change alternate number to %d (error=%i)\n",
+ dev->alt, errCode);
+ return errCode;
}
}
- return (0);
+ return 0;
}
-static inline void em28xx_isoc_video_copy(struct em28xx *dev,
- struct em28xx_frame_t **f, unsigned char *buf, int len)
-{
- void *fieldstart, *startwrite, *startread;
- int linesdone, currlinedone, offset, lencopy,remain;
-
- if(dev->frame_size != (*f)->buf.length){
- em28xx_err("frame_size %i and buf.length %i are different!!!\n",dev->frame_size,(*f)->buf.length);
- return;
- }
-
- if ((*f)->fieldbytesused + len > dev->field_size)
- len =dev->field_size - (*f)->fieldbytesused;
-
- if (buf[0] != 0x88 && buf[0] != 0x22) {
- em28xx_isocdbg("frame is not complete\n");
- startread = buf;
- len+=4;
- } else
- startread = buf + 4;
-
- remain = len;
-
- if ((*f)->top_field)
- fieldstart = (*f)->bufmem;
- else
- fieldstart = (*f)->bufmem + dev->bytesperline;
-
- linesdone = (*f)->fieldbytesused / dev->bytesperline;
- currlinedone = (*f)->fieldbytesused % dev->bytesperline;
- offset = linesdone * dev->bytesperline * 2 + currlinedone;
- startwrite = fieldstart + offset;
- lencopy = dev->bytesperline - currlinedone;
- lencopy = lencopy > remain ? remain : lencopy;
-
- 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;
-
- memcpy(startwrite, startread, lencopy);
- remain -= lencopy;
- }
-
- (*f)->fieldbytesused += len;
-}
+/* ------------------------------------------------------------------
+ URB control
+ ------------------------------------------------------------------*/
/*
- * em28xx_isoIrq()
- * handles the incoming isoc urbs and fills the frames from our inqueue
+ * IRQ callback, called by URB callback
*/
-static void em28xx_isocIrq(struct urb *urb)
+static void em28xx_irq_callback(struct urb *urb)
{
- struct em28xx *dev = urb->context;
- int i, status;
- struct em28xx_frame_t **f;
- unsigned long lock_flags;
-
- if (!dev)
- return;
-#ifdef ENABLE_DEBUG_ISOC_FRAMES
- if (isoc_debug>1)
- em28xx_isoc_dump(urb);
-#endif
-
- if (urb->status == -ENOENT)
- return;
-
- f = &dev->frame_current;
-
- if (dev->stream == STREAM_INTERRUPT) {
- dev->stream = STREAM_OFF;
- if ((*f))
- (*f)->state = F_QUEUED;
- em28xx_isocdbg("stream interrupted");
- wake_up_interruptible(&dev->wait_stream);
- }
+ struct em28xx_dmaqueue *dma_q = urb->context;
+ struct em28xx *dev = container_of(dma_q, struct em28xx, vidq);
+ int rc, i;
- if ((dev->state & DEV_DISCONNECTED) || (dev->state & DEV_MISCONFIGURED))
- return;
-
- if (dev->stream == STREAM_ON && !list_empty(&dev->inqueue)) {
- if (!(*f))
- (*f) = list_entry(dev->inqueue.next,
- struct em28xx_frame_t, frame);
-
- for (i = 0; i < urb->number_of_packets; i++) {
- unsigned char *buf = urb->transfer_buffer +
- urb->iso_frame_desc[i].offset;
- int len = urb->iso_frame_desc[i].actual_length - 4;
-
- if (urb->iso_frame_desc[i].status) {
- em28xx_isocdbg("data error: [%d] len=%d, status=%d", i,
- urb->iso_frame_desc[i].actual_length,
- urb->iso_frame_desc[i].status);
- if (urb->iso_frame_desc[i].status != -EPROTO)
- continue;
- }
- if (urb->iso_frame_desc[i].actual_length <= 0) {
- em28xx_isocdbg("packet %d is empty",i);
- continue;
- }
- if (urb->iso_frame_desc[i].actual_length >
- urb->iso_frame_desc[i].length) {
- em28xx_isocdbg("packet bigger than packet size");
- continue;
- }
- /*new frame */
- if (buf[0] == 0x22 && buf[1] == 0x5a) {
- em28xx_isocdbg("Video frame, length=%i!",len);
-
- if (em28xx_isoc_video(dev,f,&lock_flags,buf[2]))
- break;
- } else if (buf[0]==0x33 && buf[1]==0x95 && buf[2]==0x00) {
- em28xx_isocdbg("VBI HEADER!!!");
- }
-
- /* actual copying */
- if ((*f)->state == F_GRABBING) {
- em28xx_isoc_video_copy(dev,f,buf, len);
- }
- }
- }
+ /* Copy data from URB */
+ spin_lock(&dev->slock);
+ rc = dev->isoc_ctl.isoc_copy(dev, urb);
+ spin_unlock(&dev->slock);
+ /* 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;
- if ((status = usb_submit_urb(urb, GFP_ATOMIC))) {
- em28xx_errdev("resubmit of urb failed (error=%i)\n", status);
- dev->state |= DEV_MISCONFIGURED;
+
+ urb->status = usb_submit_urb(urb, GFP_ATOMIC);
+ if (urb->status) {
+ em28xx_err("urb resubmit failed (error=%i)\n",
+ urb->status);
}
- wake_up_interruptible(&dev->wait_frame);
- return;
}
/*
- * em28xx_uninit_isoc()
- * deallocates the buffers and urbs allocated during em28xx_init_iosc()
+ * Stop and Deallocate URBs
*/
void em28xx_uninit_isoc(struct em28xx *dev)
{
+ struct urb *urb;
int i;
- for (i = 0; i < EM28XX_NUM_BUFS; i++) {
- if (dev->urb[i]) {
- usb_kill_urb(dev->urb[i]);
- if (dev->transfer_buffer[i]) {
+ em28xx_isocdbg("em28xx: called em28xx_uninit_isoc\n");
+
+ dev->isoc_ctl.nfields = -1;
+ 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,
- dev->urb[i]->transfer_buffer_length,
- dev->transfer_buffer[i],
- dev->urb[i]->transfer_dma);
+ urb->transfer_buffer_length,
+ dev->isoc_ctl.transfer_buffer[i],
+ urb->transfer_dma);
}
- usb_free_urb(dev->urb[i]);
+ usb_free_urb(urb);
+ dev->isoc_ctl.urb[i] = NULL;
}
- dev->urb[i] = NULL;
- dev->transfer_buffer[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;
+
em28xx_capture_start(dev, 0);
}
+EXPORT_SYMBOL_GPL(em28xx_uninit_isoc);
/*
- * em28xx_init_isoc()
- * allocates transfer buffers and submits the urbs for isoc transfer
+ * Allocate URBs and start IRQ
*/
-int em28xx_init_isoc(struct em28xx *dev)
+int em28xx_init_isoc(struct em28xx *dev, int max_packets,
+ int num_bufs, int max_pkt_size,
+ int (*isoc_copy) (struct em28xx *dev, struct urb *urb),
+ int cap_type)
{
- /* change interface to 3 which allows the biggest packet sizes */
- int i, errCode;
- int sb_size;
-
- em28xx_set_alternate(dev);
- sb_size = EM28XX_NUM_PACKETS * dev->max_pkt_size;
-
- /* reset streaming vars */
- dev->frame_current = NULL;
- dev->frame_count = 0;
-
- /* allocate urbs */
- for (i = 0; i < EM28XX_NUM_BUFS; i++) {
- struct urb *urb;
- int j;
- /* allocate transfer buffer */
- urb = usb_alloc_urb(EM28XX_NUM_PACKETS, GFP_KERNEL);
- if (!urb){
- em28xx_errdev("cannot alloc urb %i\n", i);
+ struct em28xx_dmaqueue *dma_q = &dev->vidq;
+ int i;
+ int sb_size, pipe;
+ struct urb *urb;
+ int j, k;
+ int rc;
+
+ em28xx_isocdbg("em28xx: called em28xx_prepare_isoc\n");
+
+ /* De-allocates all pending stuff */
+ em28xx_uninit_isoc(dev);
+
+ dev->isoc_ctl.isoc_copy = isoc_copy;
+ 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 = max_pkt_size;
+ dev->isoc_ctl.buf = NULL;
+
+ 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->transfer_buffer[i] = usb_buffer_alloc(dev->udev, sb_size,
- GFP_KERNEL,
- &urb->transfer_dma);
- if (!dev->transfer_buffer[i]) {
- em28xx_errdev
- ("unable to allocate %i bytes for transfer buffer %i\n",
- sb_size, i);
+ 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);
- usb_free_urb(urb);
return -ENOMEM;
}
- memset(dev->transfer_buffer[i], 0, sb_size);
- urb->dev = dev->udev;
- urb->context = dev;
- urb->pipe = usb_rcvisocpipe(dev->udev, 0x82);
+ 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,
+ cap_type == EM28XX_ANALOG_CAPTURE ? 0x82 : 0x84);
+
+ 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;
- urb->interval = 1;
- urb->transfer_buffer = dev->transfer_buffer[i];
- urb->complete = em28xx_isocIrq;
- urb->number_of_packets = EM28XX_NUM_PACKETS;
- urb->transfer_buffer_length = sb_size;
- for (j = 0; j < EM28XX_NUM_PACKETS; j++) {
- urb->iso_frame_desc[j].offset = j * dev->max_pkt_size;
- urb->iso_frame_desc[j].length = dev->max_pkt_size;
- }
- dev->urb[i] = urb;
- }
- /* submit urbs */
- em28xx_coredbg("Submitting %d urbs of %d packets (%d each)\n",
- EM28XX_NUM_BUFS, EM28XX_NUM_PACKETS, dev->max_pkt_size);
- for (i = 0; i < EM28XX_NUM_BUFS; i++) {
- errCode = usb_submit_urb(dev->urb[i], GFP_KERNEL);
- if (errCode) {
- em28xx_errdev("submit of urb %i failed (error=%i)\n", i,
- errCode);
- em28xx_uninit_isoc(dev);
- return errCode;
+ 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;
-}
-
-int em28xx_set_alternate(struct em28xx *dev)
-{
- int errCode, prev_alt = dev->alt;
- int i;
- unsigned int min_pkt_size = dev->bytesperline+4;
-
- /* When image size is bigger than a ceirtain value,
- the frame size should be increased, otherwise, only
- green screen will be received.
- */
- if (dev->frame_size > 720*240*2)
- min_pkt_size *= 2;
+ init_waitqueue_head(&dma_q->wq);
- for (i = 0; i < dev->num_alt; i++)
- if (dev->alt_max_pkt_size[i] >= min_pkt_size)
- break;
- dev->alt = i;
+ em28xx_capture_start(dev, cap_type);
- if (dev->alt != prev_alt) {
- em28xx_coredbg("minimum isoc packet size: %u (alt=%d)\n",
- min_pkt_size, dev->alt);
- dev->max_pkt_size = dev->alt_max_pkt_size[dev->alt];
- em28xx_coredbg("setting alternate %d with wMaxPacketSize=%u\n",
- dev->alt, dev->max_pkt_size);
- errCode = usb_set_interface(dev->udev, 0, dev->alt);
- if (errCode < 0) {
- em28xx_errdev ("cannot change alternate number to %d (error=%i)\n",
- dev->alt, errCode);
- return errCode;
+ /* 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;
}
}
+
return 0;
}
+EXPORT_SYMBOL_GPL(em28xx_init_isoc);
projects / linux-2.6-omap-h63xx.git / blobdiff