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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
commit2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch)
tree848558de17fb3008cdf4d861b01ac7781903ce39 /drivers/media/usb/dvb-usb-v2/dvb_usb_urb.c
parentInitial commit. (diff)
downloadlinux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz
linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip
Adding upstream version 6.1.76.upstream/6.1.76upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
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.c96
1 files changed, 96 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 000000000..7e817ea50
--- /dev/null
+++ b/drivers/media/usb/dvb-usb-v2/dvb_usb_urb.c
@@ -0,0 +1,96 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * DVB USB framework
+ *
+ * Copyright (C) 2004-6 Patrick Boettcher <patrick.boettcher@posteo.de>
+ * Copyright (C) 2012 Antti Palosaari <crope@iki.fi>
+ */
+
+#include "dvb_usb_common.h"
+
+static int dvb_usb_v2_generic_io(struct dvb_usb_device *d,
+ u8 *wbuf, u16 wlen, u8 *rbuf, u16 rlen)
+{
+ int ret, actual_length;
+
+ if (!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;
+ }
+
+ 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) {
+ dev_err(&d->udev->dev, "%s: usb_bulk_msg() failed=%d\n",
+ KBUILD_MODNAME, ret);
+ return ret;
+ }
+ if (actual_length != wlen) {
+ dev_err(&d->udev->dev, "%s: usb_bulk_msg() write length=%d, actual=%d\n",
+ KBUILD_MODNAME, wlen, actual_length);
+ return -EIO;
+ }
+
+ /* an answer is expected */
+ if (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);
+ }
+
+ return ret;
+}
+
+int dvb_usbv2_generic_rw(struct dvb_usb_device *d,
+ u8 *wbuf, u16 wlen, u8 *rbuf, u16 rlen)
+{
+ int ret;
+
+ mutex_lock(&d->usb_mutex);
+ ret = dvb_usb_v2_generic_io(d, wbuf, wlen, rbuf, rlen);
+ 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)
+{
+ int ret;
+
+ mutex_lock(&d->usb_mutex);
+ ret = dvb_usb_v2_generic_io(d, buf, len, NULL, 0);
+ mutex_unlock(&d->usb_mutex);
+
+ return ret;
+}
+EXPORT_SYMBOL(dvb_usbv2_generic_write);
+
+int dvb_usbv2_generic_rw_locked(struct dvb_usb_device *d,
+ u8 *wbuf, u16 wlen, u8 *rbuf, u16 rlen)
+{
+ return dvb_usb_v2_generic_io(d, wbuf, wlen, rbuf, rlen);
+}
+EXPORT_SYMBOL(dvb_usbv2_generic_rw_locked);
+
+int dvb_usbv2_generic_write_locked(struct dvb_usb_device *d, u8 *buf, u16 len)
+{
+ return dvb_usb_v2_generic_io(d, buf, len, NULL, 0);
+}
+EXPORT_SYMBOL(dvb_usbv2_generic_write_locked);