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path: root/drivers/media/usb/dvb-usb-v2/dvb_usb_urb.c
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Diffstat (limited to 'drivers/media/usb/dvb-usb-v2/dvb_usb_urb.c')
-rw-r--r--drivers/media/usb/dvb-usb-v2/dvb_usb_urb.c77
1 files changed, 77 insertions, 0 deletions
diff --git a/drivers/media/usb/dvb-usb-v2/dvb_usb_urb.c b/drivers/media/usb/dvb-usb-v2/dvb_usb_urb.c
new file mode 100644
index 000000000000..0431beed0ef4
--- /dev/null
+++ b/drivers/media/usb/dvb-usb-v2/dvb_usb_urb.c
@@ -0,0 +1,77 @@
+/*
+ * DVB USB framework
+ *
+ * Copyright (C) 2004-6 Patrick Boettcher <patrick.boettcher@desy.de>
+ * Copyright (C) 2012 Antti Palosaari <crope@iki.fi>
+ *
+ * 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.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "dvb_usb_common.h"
+
+int dvb_usbv2_generic_rw(struct dvb_usb_device *d, u8 *wbuf, u16 wlen, u8 *rbuf,
+ u16 rlen)
+{
+ int ret, actual_length;
+
+ if (!d || !wbuf || !wlen || !d->props->generic_bulk_ctrl_endpoint ||
+ !d->props->generic_bulk_ctrl_endpoint_response) {
+ dev_dbg(&d->udev->dev, "%s: failed=%d\n", __func__, -EINVAL);
+ return -EINVAL;
+ }
+
+ ret = mutex_lock_interruptible(&d->usb_mutex);
+ if (ret < 0)
+ return ret;
+
+ dev_dbg(&d->udev->dev, "%s: >>> %*ph\n", __func__, wlen, wbuf);
+
+ ret = usb_bulk_msg(d->udev, usb_sndbulkpipe(d->udev,
+ d->props->generic_bulk_ctrl_endpoint), wbuf, wlen,
+ &actual_length, 2000);
+ if (ret < 0)
+ dev_err(&d->udev->dev, "%s: usb_bulk_msg() failed=%d\n",
+ KBUILD_MODNAME, ret);
+ else
+ ret = actual_length != wlen ? -EIO : 0;
+
+ /* an answer is expected, and no error before */
+ if (!ret && rbuf && rlen) {
+ if (d->props->generic_bulk_ctrl_delay)
+ usleep_range(d->props->generic_bulk_ctrl_delay,
+ d->props->generic_bulk_ctrl_delay
+ + 20000);
+
+ ret = usb_bulk_msg(d->udev, usb_rcvbulkpipe(d->udev,
+ d->props->generic_bulk_ctrl_endpoint_response),
+ rbuf, rlen, &actual_length, 2000);
+ if (ret)
+ dev_err(&d->udev->dev, "%s: 2nd usb_bulk_msg() " \
+ "failed=%d\n", KBUILD_MODNAME, ret);
+
+ dev_dbg(&d->udev->dev, "%s: <<< %*ph\n", __func__,
+ actual_length, rbuf);
+ }
+
+ mutex_unlock(&d->usb_mutex);
+ return ret;
+}
+EXPORT_SYMBOL(dvb_usbv2_generic_rw);
+
+int dvb_usbv2_generic_write(struct dvb_usb_device *d, u8 *buf, u16 len)
+{
+ return dvb_usbv2_generic_rw(d, buf, len, NULL, 0);
+}
+EXPORT_SYMBOL(dvb_usbv2_generic_write);