module_param(alt, int, 0644);
MODULE_PARM_DESC(alt, "alternate setting to use for video endpoint");
+/* 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()
* reads data from the usb device specifying bRequest
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)
ret = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0), req,
USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
0x0000, reg, bufs, len, HZ);
- msleep(5); /* FIXME: magic number */
+ if (dev->wait_after_write)
+ msleep(dev->wait_after_write);
+
kfree(bufs);
return ret;
}
{
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 (!(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);
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",
+ em28xx_errdev("cannot change alternate number to %d (error=%i)\n",
dev->alt, errCode);
return errCode;
}
}
return 0;
}
+
+/* ------------------------------------------------------------------
+ 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;
+
+ /* 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;
+
+ urb->status = usb_submit_urb(urb, GFP_ATOMIC);
+ if (urb->status) {
+ em28xx_err("urb resubmit failed (error=%i)\n",
+ urb->status);
+ }
+}
+
+/*
+ * Stop and Deallocate URBs
+ */
+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;
+ 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;
+
+ em28xx_capture_start(dev, 0);
+}
+EXPORT_SYMBOL_GPL(em28xx_uninit_isoc);
+
+/*
+ * Allocate URBs and start IRQ
+ */
+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)
+{
+ 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->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,
+ 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;
+
+ 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;
+ }
+ }
+
+ init_waitqueue_head(&dma_q->wq);
+
+ em28xx_capture_start(dev, cap_type);
+
+ /* 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 / karo-tx-linux.git / blobdiff