1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-or-later
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * DVB USB framework
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Copyright (C) 2004-6 Patrick Boettcher <patrick.boettcher@posteo.de>
6*4882a593Smuzhiyun * Copyright (C) 2012 Antti Palosaari <crope@iki.fi>
7*4882a593Smuzhiyun */
8*4882a593Smuzhiyun
9*4882a593Smuzhiyun #include "dvb_usb_common.h"
10*4882a593Smuzhiyun
dvb_usb_v2_generic_io(struct dvb_usb_device * d,u8 * wbuf,u16 wlen,u8 * rbuf,u16 rlen)11*4882a593Smuzhiyun static int dvb_usb_v2_generic_io(struct dvb_usb_device *d,
12*4882a593Smuzhiyun u8 *wbuf, u16 wlen, u8 *rbuf, u16 rlen)
13*4882a593Smuzhiyun {
14*4882a593Smuzhiyun int ret, actual_length;
15*4882a593Smuzhiyun
16*4882a593Smuzhiyun if (!wbuf || !wlen || !d->props->generic_bulk_ctrl_endpoint ||
17*4882a593Smuzhiyun !d->props->generic_bulk_ctrl_endpoint_response) {
18*4882a593Smuzhiyun dev_dbg(&d->udev->dev, "%s: failed=%d\n", __func__, -EINVAL);
19*4882a593Smuzhiyun return -EINVAL;
20*4882a593Smuzhiyun }
21*4882a593Smuzhiyun
22*4882a593Smuzhiyun dev_dbg(&d->udev->dev, "%s: >>> %*ph\n", __func__, wlen, wbuf);
23*4882a593Smuzhiyun
24*4882a593Smuzhiyun ret = usb_bulk_msg(d->udev, usb_sndbulkpipe(d->udev,
25*4882a593Smuzhiyun d->props->generic_bulk_ctrl_endpoint), wbuf, wlen,
26*4882a593Smuzhiyun &actual_length, 2000);
27*4882a593Smuzhiyun if (ret) {
28*4882a593Smuzhiyun dev_err(&d->udev->dev, "%s: usb_bulk_msg() failed=%d\n",
29*4882a593Smuzhiyun KBUILD_MODNAME, ret);
30*4882a593Smuzhiyun return ret;
31*4882a593Smuzhiyun }
32*4882a593Smuzhiyun if (actual_length != wlen) {
33*4882a593Smuzhiyun dev_err(&d->udev->dev, "%s: usb_bulk_msg() write length=%d, actual=%d\n",
34*4882a593Smuzhiyun KBUILD_MODNAME, wlen, actual_length);
35*4882a593Smuzhiyun return -EIO;
36*4882a593Smuzhiyun }
37*4882a593Smuzhiyun
38*4882a593Smuzhiyun /* an answer is expected */
39*4882a593Smuzhiyun if (rbuf && rlen) {
40*4882a593Smuzhiyun if (d->props->generic_bulk_ctrl_delay)
41*4882a593Smuzhiyun usleep_range(d->props->generic_bulk_ctrl_delay,
42*4882a593Smuzhiyun d->props->generic_bulk_ctrl_delay
43*4882a593Smuzhiyun + 20000);
44*4882a593Smuzhiyun
45*4882a593Smuzhiyun ret = usb_bulk_msg(d->udev, usb_rcvbulkpipe(d->udev,
46*4882a593Smuzhiyun d->props->generic_bulk_ctrl_endpoint_response),
47*4882a593Smuzhiyun rbuf, rlen, &actual_length, 2000);
48*4882a593Smuzhiyun if (ret)
49*4882a593Smuzhiyun dev_err(&d->udev->dev,
50*4882a593Smuzhiyun "%s: 2nd usb_bulk_msg() failed=%d\n",
51*4882a593Smuzhiyun KBUILD_MODNAME, ret);
52*4882a593Smuzhiyun
53*4882a593Smuzhiyun dev_dbg(&d->udev->dev, "%s: <<< %*ph\n", __func__,
54*4882a593Smuzhiyun actual_length, rbuf);
55*4882a593Smuzhiyun }
56*4882a593Smuzhiyun
57*4882a593Smuzhiyun return ret;
58*4882a593Smuzhiyun }
59*4882a593Smuzhiyun
dvb_usbv2_generic_rw(struct dvb_usb_device * d,u8 * wbuf,u16 wlen,u8 * rbuf,u16 rlen)60*4882a593Smuzhiyun int dvb_usbv2_generic_rw(struct dvb_usb_device *d,
61*4882a593Smuzhiyun u8 *wbuf, u16 wlen, u8 *rbuf, u16 rlen)
62*4882a593Smuzhiyun {
63*4882a593Smuzhiyun int ret;
64*4882a593Smuzhiyun
65*4882a593Smuzhiyun mutex_lock(&d->usb_mutex);
66*4882a593Smuzhiyun ret = dvb_usb_v2_generic_io(d, wbuf, wlen, rbuf, rlen);
67*4882a593Smuzhiyun mutex_unlock(&d->usb_mutex);
68*4882a593Smuzhiyun
69*4882a593Smuzhiyun return ret;
70*4882a593Smuzhiyun }
71*4882a593Smuzhiyun EXPORT_SYMBOL(dvb_usbv2_generic_rw);
72*4882a593Smuzhiyun
dvb_usbv2_generic_write(struct dvb_usb_device * d,u8 * buf,u16 len)73*4882a593Smuzhiyun int dvb_usbv2_generic_write(struct dvb_usb_device *d, u8 *buf, u16 len)
74*4882a593Smuzhiyun {
75*4882a593Smuzhiyun int ret;
76*4882a593Smuzhiyun
77*4882a593Smuzhiyun mutex_lock(&d->usb_mutex);
78*4882a593Smuzhiyun ret = dvb_usb_v2_generic_io(d, buf, len, NULL, 0);
79*4882a593Smuzhiyun mutex_unlock(&d->usb_mutex);
80*4882a593Smuzhiyun
81*4882a593Smuzhiyun return ret;
82*4882a593Smuzhiyun }
83*4882a593Smuzhiyun EXPORT_SYMBOL(dvb_usbv2_generic_write);
84*4882a593Smuzhiyun
dvb_usbv2_generic_rw_locked(struct dvb_usb_device * d,u8 * wbuf,u16 wlen,u8 * rbuf,u16 rlen)85*4882a593Smuzhiyun int dvb_usbv2_generic_rw_locked(struct dvb_usb_device *d,
86*4882a593Smuzhiyun u8 *wbuf, u16 wlen, u8 *rbuf, u16 rlen)
87*4882a593Smuzhiyun {
88*4882a593Smuzhiyun return dvb_usb_v2_generic_io(d, wbuf, wlen, rbuf, rlen);
89*4882a593Smuzhiyun }
90*4882a593Smuzhiyun EXPORT_SYMBOL(dvb_usbv2_generic_rw_locked);
91*4882a593Smuzhiyun
dvb_usbv2_generic_write_locked(struct dvb_usb_device * d,u8 * buf,u16 len)92*4882a593Smuzhiyun int dvb_usbv2_generic_write_locked(struct dvb_usb_device *d, u8 *buf, u16 len)
93*4882a593Smuzhiyun {
94*4882a593Smuzhiyun return dvb_usb_v2_generic_io(d, buf, len, NULL, 0);
95*4882a593Smuzhiyun }
96*4882a593Smuzhiyun EXPORT_SYMBOL(dvb_usbv2_generic_write_locked);
97