Markus Rechberger <mrechberger@gmail.com>
Mauro Carvalho Chehab <mchehab@infradead.org>
Sascha Sommer <saschasommer@freenet.de>
+ Copyright (C) 2012 Frank Schäfer <fschaefer.oss@googlemail.com>
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
if (udev->speed == USB_SPEED_HIGH)
size = size * hb_mult(sizedescr);
- if (usb_endpoint_xfer_isoc(e) &&
- usb_endpoint_dir_in(e)) {
+ if (usb_endpoint_dir_in(e)) {
switch (e->bEndpointAddress) {
- case EM28XX_EP_AUDIO:
- has_audio = true;
- break;
- case EM28XX_EP_ANALOG:
+ case 0x82:
has_video = true;
- dev->alt_max_pkt_size_isoc[i] = size;
+ if (usb_endpoint_xfer_isoc(e)) {
+ dev->analog_ep_isoc =
+ e->bEndpointAddress;
+ dev->alt_max_pkt_size_isoc[i] = size;
+ } else if (usb_endpoint_xfer_bulk(e)) {
+ dev->analog_ep_bulk =
+ e->bEndpointAddress;
+ }
+ break;
+ case 0x83:
+ if (usb_endpoint_xfer_isoc(e)) {
+ has_audio = true;
+ } else {
+ printk(KERN_INFO DRIVER_NAME
+ ": error: skipping audio endpoint 0x83, because it uses bulk transfers !\n");
+ }
break;
- case EM28XX_EP_DIGITAL:
- has_dvb = true;
- if (size > dev->dvb_max_pkt_size_isoc) {
- dev->dvb_max_pkt_size_isoc =
- size;
- dev->dvb_alt_isoc = i;
+ case 0x84:
+ if (has_video &&
+ (usb_endpoint_xfer_bulk(e))) {
+ dev->analog_ep_bulk =
+ e->bEndpointAddress;
+ } else {
+ has_dvb = true;
+ if (usb_endpoint_xfer_isoc(e)) {
+ dev->dvb_ep_isoc = e->bEndpointAddress;
+ if (size > dev->dvb_max_pkt_size_isoc) {
+ dev->dvb_max_pkt_size_isoc = size;
+ dev->dvb_alt_isoc = i;
+ }
+ } else {
+ dev->dvb_ep_bulk = e->bEndpointAddress;
+ }
}
break;
}
}
+ /* NOTE:
+ * Old logic with support for isoc transfers only was:
+ * 0x82 isoc => analog
+ * 0x83 isoc => audio
+ * 0x84 isoc => digital
+ *
+ * New logic with support for bulk transfers
+ * 0x82 isoc => analog
+ * 0x82 bulk => analog
+ * 0x83 isoc* => audio
+ * 0x84 isoc => digital
+ * 0x84 bulk => analog or digital**
+ * (*: audio should always be isoc)
+ * (**: analog, if ep 0x82 is isoc, otherwise digital)
+ *
+ * The new logic preserves backwards compatibility and
+ * reflects the endpoint configurations we have seen
+ * so far. But there might be devices for which this
+ * logic is not sufficient...
+ */
}
}
goto err_free;
}
+ /* Select USB transfer types to use */
+ if (has_video && !dev->analog_ep_isoc)
+ dev->analog_xfer_bulk = 1;
+ if (has_dvb && !dev->dvb_ep_isoc)
+ dev->dvb_xfer_bulk = 1;
+
snprintf(dev->name, sizeof(dev->name), "em28xx #%d", nr);
dev->devno = nr;
dev->model = id->driver_info;
}
if (has_dvb) {
- /* pre-allocate DVB isoc transfer buffers */
- retval = em28xx_alloc_urbs(dev, EM28XX_DIGITAL_MODE, 0,
- EM28XX_DVB_NUM_BUFS,
- dev->dvb_max_pkt_size_isoc,
- EM28XX_DVB_NUM_ISOC_PACKETS);
+ /* pre-allocate DVB usb transfer buffers */
+ if (dev->dvb_xfer_bulk) {
+ retval = em28xx_alloc_urbs(dev, EM28XX_DIGITAL_MODE,
+ dev->dvb_xfer_bulk,
+ EM28XX_DVB_NUM_BUFS,
+ 512,
+ EM28XX_DVB_BULK_PACKET_MULTIPLIER);
+ } else {
+ retval = em28xx_alloc_urbs(dev, EM28XX_DIGITAL_MODE,
+ dev->dvb_xfer_bulk,
+ EM28XX_DVB_NUM_BUFS,
+ dev->dvb_max_pkt_size_isoc,
+ EM28XX_DVB_NUM_ISOC_PACKETS);
+ }
if (retval) {
+ printk(DRIVER_NAME
+ ": Failed to pre-allocate USB transfer buffers for DVB.\n");
goto unlock_and_free;
}
}
if (dev->alt != prev_alt) {
if (dev->analog_xfer_bulk) {
dev->max_pkt_size = 512; /* USB 2.0 spec */
+ dev->packet_multiplier = EM28XX_BULK_PACKET_MULTIPLIER;
} else { /* isoc */
em28xx_coredbg("minimum isoc packet size: %u (alt=%d)\n",
min_pkt_size, dev->alt);
dev->max_pkt_size =
dev->alt_max_pkt_size_isoc[dev->alt];
+ dev->packet_multiplier = EM28XX_NUM_ISOC_PACKETS;
}
em28xx_coredbg("setting alternate %d with wMaxPacketSize=%u\n",
dev->alt, dev->max_pkt_size);
em28xx_isocdbg("em28xx: called em28xx_alloc_isoc in mode %d\n", mode);
- if (mode == EM28XX_DIGITAL_MODE)
+ /* Check mode and if we have an endpoint for the selected
+ transfer type, select buffer */
+ if (mode == EM28XX_DIGITAL_MODE) {
+ if ((xfer_bulk && !dev->dvb_ep_bulk) ||
+ (!xfer_bulk && !dev->dvb_ep_isoc)) {
+ em28xx_errdev("no endpoint for DVB mode and transfer type %d\n",
+ xfer_bulk > 0);
+ return -EINVAL;
+ }
usb_bufs = &dev->usb_ctl.digital_bufs;
- else
+ } else if (mode == EM28XX_ANALOG_MODE) {
+ if ((xfer_bulk && !dev->analog_ep_bulk) ||
+ (!xfer_bulk && !dev->analog_ep_isoc)) {
+ em28xx_errdev("no endpoint for analog mode and transfer type %d\n",
+ xfer_bulk > 0);
+ return -EINVAL;
+ }
usb_bufs = &dev->usb_ctl.analog_bufs;
+ } else {
+ em28xx_errdev("invalid mode selected\n");
+ return -EINVAL;
+ }
/* De-allocates all pending stuff */
em28xx_uninit_usb_xfer(dev, mode);
if (xfer_bulk) { /* bulk */
pipe = usb_rcvbulkpipe(dev->udev,
mode == EM28XX_ANALOG_MODE ?
- EM28XX_EP_ANALOG :
- EM28XX_EP_DIGITAL);
+ dev->analog_ep_bulk :
+ dev->dvb_ep_bulk);
usb_fill_bulk_urb(urb, dev->udev, pipe,
usb_bufs->transfer_buffer[i], sb_size,
em28xx_irq_callback, dev);
} else { /* isoc */
pipe = usb_rcvisocpipe(dev->udev,
mode == EM28XX_ANALOG_MODE ?
- EM28XX_EP_ANALOG :
- EM28XX_EP_DIGITAL);
+ dev->analog_ep_isoc :
+ dev->dvb_ep_isoc);
usb_fill_int_urb(urb, dev->udev, pipe,
usb_bufs->transfer_buffer[i], sb_size,
em28xx_irq_callback, dev, 1);
{
int rc;
struct em28xx *dev = dvb->adapter.priv;
- int max_dvb_packet_size;
+ int dvb_max_packet_size, packet_multiplier, dvb_alt;
+
+ if (dev->dvb_xfer_bulk) {
+ if (!dev->dvb_ep_bulk)
+ return -ENODEV;
+ dvb_max_packet_size = 512; /* USB 2.0 spec */
+ packet_multiplier = EM28XX_DVB_BULK_PACKET_MULTIPLIER;
+ dvb_alt = 0;
+ } else { /* isoc */
+ if (!dev->dvb_ep_isoc)
+ return -ENODEV;
+ dvb_max_packet_size = dev->dvb_max_pkt_size_isoc;
+ if (dvb_max_packet_size < 0)
+ return dvb_max_packet_size;
+ packet_multiplier = EM28XX_DVB_NUM_ISOC_PACKETS;
+ dvb_alt = dev->dvb_alt_isoc;
+ }
- usb_set_interface(dev->udev, 0, dev->dvb_alt_isoc);
+ usb_set_interface(dev->udev, 0, dvb_alt);
rc = em28xx_set_mode(dev, EM28XX_DIGITAL_MODE);
if (rc < 0)
return rc;
- max_dvb_packet_size = dev->dvb_max_pkt_size_isoc;
- if (max_dvb_packet_size < 0)
- return max_dvb_packet_size;
dprintk(1, "Using %d buffers each with %d x %d bytes\n",
EM28XX_DVB_NUM_BUFS,
- EM28XX_DVB_NUM_ISOC_PACKETS,
- max_dvb_packet_size);
+ packet_multiplier,
+ dvb_max_packet_size);
- return em28xx_init_usb_xfer(dev, EM28XX_DIGITAL_MODE, 0,
+ return em28xx_init_usb_xfer(dev, EM28XX_DIGITAL_MODE,
+ dev->dvb_xfer_bulk,
EM28XX_DVB_NUM_BUFS,
- max_dvb_packet_size,
- EM28XX_DVB_NUM_ISOC_PACKETS,
+ dvb_max_packet_size,
+ packet_multiplier,
em28xx_dvb_urb_data_copy);
}
#define EM_GPO_3 (1 << 3)
/* em28xx endpoints */
-#define EM28XX_EP_ANALOG 0x82
+/* 0x82: (always ?) analog */
#define EM28XX_EP_AUDIO 0x83
-#define EM28XX_EP_DIGITAL 0x84
+/* 0x84: digital or analog */
/* em2800 registers */
#define EM2800_R08_AUDIOSRC 0x08
if (urb_init) {
if (em28xx_vbi_supported(dev) == 1)
- rc = em28xx_init_usb_xfer(dev, EM28XX_ANALOG_MODE, 0,
+ rc = em28xx_init_usb_xfer(dev, EM28XX_ANALOG_MODE,
+ dev->analog_xfer_bulk,
EM28XX_NUM_BUFS,
dev->max_pkt_size,
- EM28XX_NUM_ISOC_PACKETS,
+ dev->packet_multiplier,
em28xx_urb_data_copy_vbi);
else
- rc = em28xx_init_usb_xfer(dev, EM28XX_ANALOG_MODE, 0,
+ rc = em28xx_init_usb_xfer(dev, EM28XX_ANALOG_MODE,
+ dev->analog_xfer_bulk,
EM28XX_NUM_BUFS,
dev->max_pkt_size,
- EM28XX_NUM_ISOC_PACKETS,
+ dev->packet_multiplier,
em28xx_urb_data_copy);
if (rc < 0)
goto fail;
#define EM28XX_NUM_ISOC_PACKETS 64
#define EM28XX_DVB_NUM_ISOC_PACKETS 64
+/* bulk transfers: transfer buffer size = packet size * packet multiplier
+ USB 2.0 spec says bulk packet size is always 512 bytes
+ */
+#define EM28XX_BULK_PACKET_MULTIPLIER 384
+#define EM28XX_DVB_BULK_PACKET_MULTIPLIER 384
+
#define EM28XX_INTERLACED_DEFAULT 1
/*
/* usb transfer */
struct usb_device *udev; /* the usb device */
+ u8 analog_ep_isoc; /* address of isoc endpoint for analog */
+ u8 analog_ep_bulk; /* address of bulk endpoint for analog */
+ u8 dvb_ep_isoc; /* address of isoc endpoint for DVB */
+ u8 dvb_ep_bulk; /* address of bulk endpoint for DVC */
int alt; /* alternate setting */
int max_pkt_size; /* max packet size of the selected ep at alt */
+ int packet_multiplier; /* multiplier for wMaxPacketSize, used for
+ URB buffer size definition */
int num_alt; /* number of alternative settings */
unsigned int *alt_max_pkt_size_isoc; /* array of isoc wMaxPacketSize */
unsigned int analog_xfer_bulk:1; /* use bulk instead of isoc
projects / GitHub / exynos8895 / android_kernel_samsung_universal8895.git / commitdiff