12aa72f3bSAlexey Klimov // SPDX-License-Identifier: GPL-2.0-or-later
22aa72f3bSAlexey Klimov /*
32aa72f3bSAlexey Klimov * A driver for the AverMedia MR 800 USB FM radio. This device plugs
42aa72f3bSAlexey Klimov * into both the USB and an analog audio input, so this thing
52aa72f3bSAlexey Klimov * only deals with initialization and frequency setting, the
62aa72f3bSAlexey Klimov * audio data has to be handled by a sound driver.
72aa72f3bSAlexey Klimov *
82aa72f3bSAlexey Klimov * Copyright (c) 2008 Alexey Klimov <klimov.linux@gmail.com>
92aa72f3bSAlexey Klimov */
102aa72f3bSAlexey Klimov
112aa72f3bSAlexey Klimov /*
122aa72f3bSAlexey Klimov * Big thanks to authors and contributors of dsbr100.c and radio-si470x.c
132aa72f3bSAlexey Klimov *
142aa72f3bSAlexey Klimov * When work was looked pretty good, i discover this:
152aa72f3bSAlexey Klimov * http://av-usbradio.sourceforge.net/index.php
162aa72f3bSAlexey Klimov * http://sourceforge.net/projects/av-usbradio/
172aa72f3bSAlexey Klimov * Latest release of theirs project was in 2005.
182aa72f3bSAlexey Klimov * Probably, this driver could be improved through using their
192aa72f3bSAlexey Klimov * achievements (specifications given).
202aa72f3bSAlexey Klimov * Also, Faidon Liambotis <paravoid@debian.org> wrote nice driver for this radio
2171f07d94SAlexey Klimov * in 2007. He allowed to use his driver to improve current mr800 radio driver.
222aa72f3bSAlexey Klimov * http://www.spinics.net/lists/linux-usb-devel/msg10109.html
232aa72f3bSAlexey Klimov *
242aa72f3bSAlexey Klimov * Version 0.01: First working version.
252aa72f3bSAlexey Klimov * It's required to blacklist AverMedia USB Radio
262aa72f3bSAlexey Klimov * in usbhid/hid-quirks.c
27af901ca1SAndré Goddard Rosa * Version 0.10: A lot of cleanups and fixes: unpluging the device,
282aa72f3bSAlexey Klimov * few mutex locks were added, codinstyle issues, etc.
2971f07d94SAlexey Klimov * Added stereo support. Thanks to
3071f07d94SAlexey Klimov * Douglas Schilling Landgraf <dougsland@gmail.com> and
318effbff4SPranith Kumar * David Ellingsworth <david@identd.dyndns.org>
322aa72f3bSAlexey Klimov * for discussion, help and support.
332aa72f3bSAlexey Klimov * Version 0.11: Converted to v4l2_device.
342aa72f3bSAlexey Klimov *
352aa72f3bSAlexey Klimov * Many things to do:
3671f07d94SAlexey Klimov * - Correct power management of device (suspend & resume)
3771f07d94SAlexey Klimov * - Add code for scanning and smooth tuning
3871f07d94SAlexey Klimov * - Add code for sensitivity value
3971f07d94SAlexey Klimov * - Correct mistakes
4071f07d94SAlexey Klimov * - In Japan another FREQ_MIN and FREQ_MAX
4171f07d94SAlexey Klimov */
42b466248dSAlexey Klimov
432aa72f3bSAlexey Klimov /* kernel includes */
442aa72f3bSAlexey Klimov #include <linux/kernel.h>
453dbda77eSUwe Kleine-Koenig #include <linux/module.h>
462aa72f3bSAlexey Klimov #include <linux/init.h>
472aa72f3bSAlexey Klimov #include <linux/slab.h>
482aa72f3bSAlexey Klimov #include <linux/input.h>
492aa72f3bSAlexey Klimov #include <linux/videodev2.h>
502aa72f3bSAlexey Klimov #include <media/v4l2-device.h>
512aa72f3bSAlexey Klimov #include <media/v4l2-ioctl.h>
522aa72f3bSAlexey Klimov #include <media/v4l2-ctrls.h>
532aa72f3bSAlexey Klimov #include <media/v4l2-event.h>
542aa72f3bSAlexey Klimov #include <linux/usb.h>
552aa72f3bSAlexey Klimov #include <linux/mutex.h>
562aa72f3bSAlexey Klimov
572aa72f3bSAlexey Klimov /* driver and module definitions */
582aa72f3bSAlexey Klimov #define DRIVER_AUTHOR "Alexey Klimov <klimov.linux@gmail.com>"
59b466248dSAlexey Klimov #define DRIVER_DESC "AverMedia MR 800 USB FM radio driver"
602aa72f3bSAlexey Klimov #define DRIVER_VERSION "0.1.2"
6185578b0fSHans Verkuil
6285578b0fSHans Verkuil MODULE_AUTHOR(DRIVER_AUTHOR);
632aa72f3bSAlexey Klimov MODULE_DESCRIPTION(DRIVER_DESC);
6424c44d85SAlessio Igor Bogani MODULE_LICENSE("GPL");
652aa72f3bSAlexey Klimov MODULE_VERSION(DRIVER_VERSION);
662aa72f3bSAlexey Klimov
672aa72f3bSAlexey Klimov #define USB_AMRADIO_VENDOR 0x07ca
682aa72f3bSAlexey Klimov #define USB_AMRADIO_PRODUCT 0xb800
6929834c1aSMauro Carvalho Chehab
702aa72f3bSAlexey Klimov /* dev_warn macro with driver name */
712aa72f3bSAlexey Klimov #define MR800_DRIVER_NAME "radio-mr800"
722aa72f3bSAlexey Klimov #define amradio_dev_warn(dev, fmt, arg...) \
732aa72f3bSAlexey Klimov dev_warn(dev, MR800_DRIVER_NAME " - " fmt, ##arg)
7429834c1aSMauro Carvalho Chehab
752aa72f3bSAlexey Klimov #define amradio_dev_err(dev, fmt, arg...) \
762aa72f3bSAlexey Klimov dev_err(dev, MR800_DRIVER_NAME " - " fmt, ##arg)
772aa72f3bSAlexey Klimov
782aa72f3bSAlexey Klimov /* Probably USB_TIMEOUT should be modified in module parameter */
79e60b022eSAlexey Klimov #define BUFFER_LENGTH 8
80e60b022eSAlexey Klimov #define USB_TIMEOUT 500
81e60b022eSAlexey Klimov
82e60b022eSAlexey Klimov /* Frequency limits in MHz -- these are European values. For Japanese
83e60b022eSAlexey Klimov devices, that would be 76 and 91. */
84502d5016SDavid Ellingsworth #define FREQ_MIN 87.5
85502d5016SDavid Ellingsworth #define FREQ_MAX 108.0
86502d5016SDavid Ellingsworth #define FREQ_MUL 16000
872aa72f3bSAlexey Klimov
882aa72f3bSAlexey Klimov /*
892aa72f3bSAlexey Klimov * Commands that device should understand
902aa72f3bSAlexey Klimov * List isn't full and will be updated with implementation of new functions
912aa72f3bSAlexey Klimov */
922aa72f3bSAlexey Klimov #define AMRADIO_SET_FREQ 0xa4
932aa72f3bSAlexey Klimov #define AMRADIO_GET_READY_FLAG 0xa5
942aa72f3bSAlexey Klimov #define AMRADIO_GET_SIGNAL 0xa7
952aa72f3bSAlexey Klimov #define AMRADIO_GET_FREQ 0xa8
962aa72f3bSAlexey Klimov #define AMRADIO_SET_SEARCH_UP 0xa9
97db821804SAlexey Klimov #define AMRADIO_SET_SEARCH_DOWN 0xaa
98db821804SAlexey Klimov #define AMRADIO_SET_MUTE 0xab
9925985edcSLucas De Marchi #define AMRADIO_SET_RIGHT_MUTE 0xac
100db821804SAlexey Klimov #define AMRADIO_SET_LEFT_MUTE 0xad
101f7c1a380SAlexey Klimov #define AMRADIO_SET_MONO 0xae
1024bd9ff19SHans Verkuil #define AMRADIO_SET_SEARCH_LVL 0xb0
10377cf3934SHans Verkuil #define AMRADIO_STOP_SEARCH 0xb1
1044bd9ff19SHans Verkuil
1054bd9ff19SHans Verkuil /* Comfortable defines for amradio_set_stereo */
1064bd9ff19SHans Verkuil #define WANT_STEREO 0x00
107db821804SAlexey Klimov #define WANT_MONO 0x01
1084bd9ff19SHans Verkuil
1094bd9ff19SHans Verkuil /* module parameter */
1101bb16d71SAlexey Klimov static int radio_nr = -1;
1114bd9ff19SHans Verkuil module_param(radio_nr, int, 0);
1124bd9ff19SHans Verkuil MODULE_PARM_DESC(radio_nr, "Radio Nr");
113db821804SAlexey Klimov
1141bb16d71SAlexey Klimov /* Data for one (physical) device */
1151bb16d71SAlexey Klimov struct amradio_device {
1161bb16d71SAlexey Klimov /* reference to USB and video device */
1171bb16d71SAlexey Klimov struct usb_device *usbdev;
1182aa72f3bSAlexey Klimov struct usb_interface *intf;
1192aa72f3bSAlexey Klimov struct video_device vdev;
1202aa72f3bSAlexey Klimov struct v4l2_device v4l2_dev;
1212aa72f3bSAlexey Klimov struct v4l2_ctrl_handler hdl;
1222aa72f3bSAlexey Klimov
1232aa72f3bSAlexey Klimov u8 *buffer;
1242aa72f3bSAlexey Klimov struct mutex lock; /* buffer locking */
1252aa72f3bSAlexey Klimov int curfreq;
1262aa72f3bSAlexey Klimov int stereo;
127d89ce0d9SOliver Neukum int muted;
12885578b0fSHans Verkuil };
129b466248dSAlexey Klimov
to_amradio_dev(struct v4l2_device * v4l2_dev)13085578b0fSHans Verkuil static inline struct amradio_device *to_amradio_dev(struct v4l2_device *v4l2_dev)
1312aa72f3bSAlexey Klimov {
1324bd9ff19SHans Verkuil return container_of(v4l2_dev, struct amradio_device, v4l2_dev);
1332aa72f3bSAlexey Klimov }
1342aa72f3bSAlexey Klimov
amradio_send_cmd(struct amradio_device * radio,u8 cmd,u8 arg,u8 * extra,u8 extralen,bool reply)1352aa72f3bSAlexey Klimov static int amradio_send_cmd(struct amradio_device *radio, u8 cmd, u8 arg,
1362aa72f3bSAlexey Klimov u8 *extra, u8 extralen, bool reply)
1372aa72f3bSAlexey Klimov {
1382aa72f3bSAlexey Klimov int retval;
139a2bdc5e6SHans Verkuil int size;
140a2bdc5e6SHans Verkuil
141a2bdc5e6SHans Verkuil radio->buffer[0] = 0x00;
142a2bdc5e6SHans Verkuil radio->buffer[1] = 0x55;
143ceb99e1bSDavid Ellingsworth radio->buffer[2] = 0xaa;
1444bd9ff19SHans Verkuil radio->buffer[3] = extralen;
1454bd9ff19SHans Verkuil radio->buffer[4] = cmd;
1462aa72f3bSAlexey Klimov radio->buffer[5] = arg;
1472aa72f3bSAlexey Klimov radio->buffer[6] = 0x00;
1482aa72f3bSAlexey Klimov radio->buffer[7] = extra || reply ? 8 : 0;
1492aa72f3bSAlexey Klimov
1502aa72f3bSAlexey Klimov retval = usb_bulk_msg(radio->usbdev, usb_sndintpipe(radio->usbdev, 2),
1512aa72f3bSAlexey Klimov radio->buffer, BUFFER_LENGTH, &size, USB_TIMEOUT);
1522aa72f3bSAlexey Klimov
1534bd9ff19SHans Verkuil if (retval < 0 || size != BUFFER_LENGTH) {
1544bd9ff19SHans Verkuil if (video_is_registered(&radio->vdev))
1554bd9ff19SHans Verkuil amradio_dev_warn(&radio->vdev.dev,
1562aa72f3bSAlexey Klimov "cmd %02x failed\n", cmd);
1574bd9ff19SHans Verkuil return retval ? retval : -EIO;
1582aa72f3bSAlexey Klimov }
1592aa72f3bSAlexey Klimov if (!extra && !reply)
1604bd9ff19SHans Verkuil return 0;
1612aa72f3bSAlexey Klimov
162e57458dcSAlexey Klimov if (extra) {
1634bd9ff19SHans Verkuil memcpy(radio->buffer, extra, extralen);
1644bd9ff19SHans Verkuil memset(radio->buffer + extralen, 0, 8 - extralen);
1654bd9ff19SHans Verkuil retval = usb_bulk_msg(radio->usbdev, usb_sndintpipe(radio->usbdev, 2),
1664bd9ff19SHans Verkuil radio->buffer, BUFFER_LENGTH, &size, USB_TIMEOUT);
1672aa72f3bSAlexey Klimov } else {
1684bd9ff19SHans Verkuil memset(radio->buffer, 0, 8);
16985578b0fSHans Verkuil retval = usb_bulk_msg(radio->usbdev, usb_rcvbulkpipe(radio->usbdev, 0x81),
1704bd9ff19SHans Verkuil radio->buffer, BUFFER_LENGTH, &size, USB_TIMEOUT);
1714bd9ff19SHans Verkuil }
1724bd9ff19SHans Verkuil if (retval == 0 && size == BUFFER_LENGTH)
1734bd9ff19SHans Verkuil return 0;
1744bd9ff19SHans Verkuil if (video_is_registered(&radio->vdev) && cmd != AMRADIO_GET_READY_FLAG)
1754bd9ff19SHans Verkuil amradio_dev_warn(&radio->vdev.dev, "follow-up to cmd %02x failed\n", cmd);
1764bd9ff19SHans Verkuil return retval ? retval : -EIO;
1774bd9ff19SHans Verkuil }
1784bd9ff19SHans Verkuil
1794bd9ff19SHans Verkuil /* switch on/off the radio. Send 8 bytes to device */
amradio_set_mute(struct amradio_device * radio,bool mute)1804bd9ff19SHans Verkuil static int amradio_set_mute(struct amradio_device *radio, bool mute)
1814bd9ff19SHans Verkuil {
1824bd9ff19SHans Verkuil int ret = amradio_send_cmd(radio,
1834bd9ff19SHans Verkuil AMRADIO_SET_MUTE, mute, NULL, 0, false);
1844bd9ff19SHans Verkuil
1854bd9ff19SHans Verkuil if (!ret)
1864bd9ff19SHans Verkuil radio->muted = mute;
1874bd9ff19SHans Verkuil return ret;
1884bd9ff19SHans Verkuil }
1894bd9ff19SHans Verkuil
1904bd9ff19SHans Verkuil /* set a frequency, freq is defined by v4l's TUNER_LOW, i.e. 1/16th kHz */
amradio_set_freq(struct amradio_device * radio,int freq)1914bd9ff19SHans Verkuil static int amradio_set_freq(struct amradio_device *radio, int freq)
1924bd9ff19SHans Verkuil {
1934bd9ff19SHans Verkuil unsigned short freq_send;
1944bd9ff19SHans Verkuil u8 buf[3];
1954bd9ff19SHans Verkuil int retval;
1964bd9ff19SHans Verkuil
1972aa72f3bSAlexey Klimov /* we need to be sure that frequency isn't out of range */
1982aa72f3bSAlexey Klimov freq = clamp_t(unsigned, freq, FREQ_MIN * FREQ_MUL, FREQ_MAX * FREQ_MUL);
1992aa72f3bSAlexey Klimov freq_send = 0x10 + (freq >> 3) / 25;
2004bd9ff19SHans Verkuil
2012aa72f3bSAlexey Klimov /* frequency is calculated from freq_send and placed in first 2 bytes */
2024b0cac5eSAlexey Klimov buf[0] = (freq_send >> 8) & 0xff;
2034bd9ff19SHans Verkuil buf[1] = freq_send & 0xff;
2042aa72f3bSAlexey Klimov buf[2] = 0x01;
2052aa72f3bSAlexey Klimov
2064b0cac5eSAlexey Klimov retval = amradio_send_cmd(radio, AMRADIO_SET_FREQ, 0, buf, 3, false);
2074b0cac5eSAlexey Klimov if (retval)
2084b0cac5eSAlexey Klimov return retval;
2094b0cac5eSAlexey Klimov radio->curfreq = freq;
2102aa72f3bSAlexey Klimov msleep(40);
2114bd9ff19SHans Verkuil return 0;
2124bd9ff19SHans Verkuil }
2134bd9ff19SHans Verkuil
amradio_set_stereo(struct amradio_device * radio,bool stereo)2142aa72f3bSAlexey Klimov static int amradio_set_stereo(struct amradio_device *radio, bool stereo)
2154bd9ff19SHans Verkuil {
2164bd9ff19SHans Verkuil int ret = amradio_send_cmd(radio,
2174bd9ff19SHans Verkuil AMRADIO_SET_MONO, !stereo, NULL, 0, false);
218798166dbSDavid Ellingsworth
2194bd9ff19SHans Verkuil if (!ret)
22085578b0fSHans Verkuil radio->stereo = stereo;
22185578b0fSHans Verkuil return ret;
2221bb16d71SAlexey Klimov }
2234bd9ff19SHans Verkuil
amradio_get_stat(struct amradio_device * radio,bool * is_stereo,u32 * signal)2241bb16d71SAlexey Klimov static int amradio_get_stat(struct amradio_device *radio, bool *is_stereo, u32 *signal)
2254bd9ff19SHans Verkuil {
2264bd9ff19SHans Verkuil int ret = amradio_send_cmd(radio,
2271bb16d71SAlexey Klimov AMRADIO_GET_SIGNAL, 0, NULL, 0, true);
2284bd9ff19SHans Verkuil
2294bd9ff19SHans Verkuil if (ret)
2304bd9ff19SHans Verkuil return ret;
2312aa72f3bSAlexey Klimov *is_stereo = radio->buffer[2] >> 7;
2322aa72f3bSAlexey Klimov *signal = (radio->buffer[3] & 0xf0) << 8;
23377cf3934SHans Verkuil return 0;
23477cf3934SHans Verkuil }
2354bd9ff19SHans Verkuil
2364bd9ff19SHans Verkuil /* Handle unplugging the device.
23777cf3934SHans Verkuil * We call video_unregister_device in any case.
2384bd9ff19SHans Verkuil * The last function called in this procedure is
2394bd9ff19SHans Verkuil * usb_amradio_device_release.
24077cf3934SHans Verkuil */
usb_amradio_disconnect(struct usb_interface * intf)24177cf3934SHans Verkuil static void usb_amradio_disconnect(struct usb_interface *intf)
24277cf3934SHans Verkuil {
24377cf3934SHans Verkuil struct amradio_device *radio = to_amradio_dev(usb_get_intfdata(intf));
24477cf3934SHans Verkuil
24571f07d94SAlexey Klimov mutex_lock(&radio->lock);
24671f07d94SAlexey Klimov video_unregister_device(&radio->vdev);
24771f07d94SAlexey Klimov amradio_set_mute(radio, true);
24871f07d94SAlexey Klimov usb_set_intfdata(intf, NULL);
24971f07d94SAlexey Klimov v4l2_device_disconnect(&radio->v4l2_dev);
2502aa72f3bSAlexey Klimov mutex_unlock(&radio->lock);
2512aa72f3bSAlexey Klimov v4l2_device_put(&radio->v4l2_dev);
252a2bdc5e6SHans Verkuil }
2532aa72f3bSAlexey Klimov
254f4e9043eSAlexey Klimov /* vidioc_querycap - query device capabilities */
vidioc_querycap(struct file * file,void * priv,struct v4l2_capability * v)25585578b0fSHans Verkuil static int vidioc_querycap(struct file *file, void *priv,
2564bd9ff19SHans Verkuil struct v4l2_capability *v)
2574bd9ff19SHans Verkuil {
258b466248dSAlexey Klimov struct amradio_device *radio = video_drvdata(file);
259a682d4cbSHans Verkuil
26085578b0fSHans Verkuil strscpy(v->driver, "radio-mr800", sizeof(v->driver));
2612aa72f3bSAlexey Klimov strscpy(v->card, "AverMedia MR 800 USB FM Radio", sizeof(v->card));
2622aa72f3bSAlexey Klimov usb_make_path(radio->usbdev, v->bus_info, sizeof(v->bus_info));
2632aa72f3bSAlexey Klimov return 0;
2642aa72f3bSAlexey Klimov }
2652aa72f3bSAlexey Klimov
2662aa72f3bSAlexey Klimov /* vidioc_g_tuner - get tuner attributes */
vidioc_g_tuner(struct file * file,void * priv,struct v4l2_tuner * v)26785578b0fSHans Verkuil static int vidioc_g_tuner(struct file *file, void *priv,
268c7181cfaSAlexey Klimov struct v4l2_tuner *v)
269c0decac1SMauro Carvalho Chehab {
270c0decac1SMauro Carvalho Chehab struct amradio_device *radio = video_drvdata(file);
271c7181cfaSAlexey Klimov bool is_stereo = false;
2722aa72f3bSAlexey Klimov int retval;
2732aa72f3bSAlexey Klimov
2742aa72f3bSAlexey Klimov if (v->index > 0)
2752aa72f3bSAlexey Klimov return -EINVAL;
2762aa72f3bSAlexey Klimov
2772aa72f3bSAlexey Klimov v->signal = 0;
2782aa72f3bSAlexey Klimov retval = amradio_get_stat(radio, &is_stereo, &v->signal);
27985578b0fSHans Verkuil if (retval)
28077cf3934SHans Verkuil return retval;
28177cf3934SHans Verkuil
2822aa72f3bSAlexey Klimov strscpy(v->name, "FM", sizeof(v->name));
2832aa72f3bSAlexey Klimov v->type = V4L2_TUNER_RADIO;
2842aa72f3bSAlexey Klimov v->rangelow = FREQ_MIN * FREQ_MUL;
2852aa72f3bSAlexey Klimov v->rangehigh = FREQ_MAX * FREQ_MUL;
28677cf3934SHans Verkuil v->capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO |
28777cf3934SHans Verkuil V4L2_TUNER_CAP_HWSEEK_WRAP;
28877cf3934SHans Verkuil v->rxsubchans = is_stereo ? V4L2_TUNER_SUB_STEREO : V4L2_TUNER_SUB_MONO;
28977cf3934SHans Verkuil v->audmode = radio->stereo ?
29077cf3934SHans Verkuil V4L2_TUNER_MODE_STEREO : V4L2_TUNER_MODE_MONO;
291cc1e6315SMauro Carvalho Chehab return 0;
2922aa72f3bSAlexey Klimov }
2932aa72f3bSAlexey Klimov
2942aa72f3bSAlexey Klimov /* vidioc_s_tuner - set tuner attributes */
vidioc_s_tuner(struct file * file,void * priv,const struct v4l2_tuner * v)29554f6019bSHans Verkuil static int vidioc_s_tuner(struct file *file, void *priv,
29654f6019bSHans Verkuil const struct v4l2_tuner *v)
29777cf3934SHans Verkuil {
29885578b0fSHans Verkuil struct amradio_device *radio = video_drvdata(file);
29985578b0fSHans Verkuil
30085578b0fSHans Verkuil if (v->index > 0)
3012aa72f3bSAlexey Klimov return -EINVAL;
3022aa72f3bSAlexey Klimov
3032aa72f3bSAlexey Klimov /* mono/stereo selector */
3042aa72f3bSAlexey Klimov switch (v->audmode) {
3052f73c7c5SHans Verkuil case V4L2_TUNER_MODE_MONO:
3062aa72f3bSAlexey Klimov return amradio_set_stereo(radio, WANT_MONO);
30785578b0fSHans Verkuil default:
3083480130aSAlexey Klimov return amradio_set_stereo(radio, WANT_STEREO);
3092aa72f3bSAlexey Klimov }
3102aa72f3bSAlexey Klimov }
3111bb16d71SAlexey Klimov
3121bb16d71SAlexey Klimov /* vidioc_s_frequency - set tuner radio frequency */
vidioc_s_frequency(struct file * file,void * priv,const struct v4l2_frequency * f)3131bb16d71SAlexey Klimov static int vidioc_s_frequency(struct file *file, void *priv,
3141bb16d71SAlexey Klimov const struct v4l2_frequency *f)
31585578b0fSHans Verkuil {
31685578b0fSHans Verkuil struct amradio_device *radio = video_drvdata(file);
31785578b0fSHans Verkuil
3181bb16d71SAlexey Klimov if (f->tuner != 0)
3192aa72f3bSAlexey Klimov return -EINVAL;
3202aa72f3bSAlexey Klimov return amradio_set_freq(radio, f->frequency);
3212aa72f3bSAlexey Klimov }
3222aa72f3bSAlexey Klimov
323b530a447SHans Verkuil /* vidioc_g_frequency - get tuner radio frequency */
vidioc_g_frequency(struct file * file,void * priv,struct v4l2_frequency * f)3242aa72f3bSAlexey Klimov static int vidioc_g_frequency(struct file *file, void *priv,
32585578b0fSHans Verkuil struct v4l2_frequency *f)
3262aa72f3bSAlexey Klimov {
32785578b0fSHans Verkuil struct amradio_device *radio = video_drvdata(file);
328a3a9e287SHans Verkuil
3294b0cac5eSAlexey Klimov if (f->tuner != 0 || f->type != V4L2_TUNER_RADIO)
3302aa72f3bSAlexey Klimov return -EINVAL;
3312aa72f3bSAlexey Klimov f->type = V4L2_TUNER_RADIO;
3322aa72f3bSAlexey Klimov f->frequency = radio->curfreq;
3332aa72f3bSAlexey Klimov
3342aa72f3bSAlexey Klimov return 0;
3352aa72f3bSAlexey Klimov }
33685578b0fSHans Verkuil
vidioc_s_hw_freq_seek(struct file * file,void * priv,const struct v4l2_hw_freq_seek * seek)3373480130aSAlexey Klimov static int vidioc_s_hw_freq_seek(struct file *file, void *priv,
33885578b0fSHans Verkuil const struct v4l2_hw_freq_seek *seek)
339a3a9e287SHans Verkuil {
3402aa72f3bSAlexey Klimov static u8 buf[8] = {
3412aa72f3bSAlexey Klimov 0x3d, 0x32, 0x0f, 0x08, 0x3d, 0x32, 0x0f, 0x08
3424aebc289SDavid Ellingsworth };
3432aa72f3bSAlexey Klimov struct amradio_device *radio = video_drvdata(file);
3442aa72f3bSAlexey Klimov unsigned long timeout;
3452aa72f3bSAlexey Klimov int retval;
3464bd9ff19SHans Verkuil
347ec6f4328SHans Verkuil if (seek->tuner != 0 || !seek->wrap_around)
3484bd9ff19SHans Verkuil return -EINVAL;
3494bd9ff19SHans Verkuil
3504bd9ff19SHans Verkuil if (file->f_flags & O_NONBLOCK)
3514bd9ff19SHans Verkuil return -EWOULDBLOCK;
3524bd9ff19SHans Verkuil
3534bd9ff19SHans Verkuil retval = amradio_send_cmd(radio,
3544bd9ff19SHans Verkuil AMRADIO_SET_SEARCH_LVL, 0, buf, 8, false);
3554bd9ff19SHans Verkuil if (retval)
3564bd9ff19SHans Verkuil return retval;
3574bd9ff19SHans Verkuil amradio_set_freq(radio, radio->curfreq);
3584bd9ff19SHans Verkuil retval = amradio_send_cmd(radio,
359617ade61SHans Verkuil seek->seek_upward ? AMRADIO_SET_SEARCH_UP : AMRADIO_SET_SEARCH_DOWN,
360617ade61SHans Verkuil 0, NULL, 0, false);
361617ade61SHans Verkuil if (retval)
3624bd9ff19SHans Verkuil return retval;
3634bd9ff19SHans Verkuil timeout = jiffies + msecs_to_jiffies(30000);
3644bd9ff19SHans Verkuil for (;;) {
3654bd9ff19SHans Verkuil if (time_after(jiffies, timeout)) {
3664bd9ff19SHans Verkuil retval = -ENODATA;
3674bd9ff19SHans Verkuil break;
3684bd9ff19SHans Verkuil }
3694bd9ff19SHans Verkuil if (schedule_timeout_interruptible(msecs_to_jiffies(10))) {
3704bd9ff19SHans Verkuil retval = -ERESTARTSYS;
3714bd9ff19SHans Verkuil break;
3724bd9ff19SHans Verkuil }
3734bd9ff19SHans Verkuil retval = amradio_send_cmd(radio, AMRADIO_GET_READY_FLAG,
3744bd9ff19SHans Verkuil 0, NULL, 0, true);
37554f6019bSHans Verkuil if (retval)
3764bd9ff19SHans Verkuil continue;
3774bd9ff19SHans Verkuil amradio_send_cmd(radio, AMRADIO_GET_FREQ, 0, NULL, 0, true);
3784bd9ff19SHans Verkuil if (radio->buffer[1] || radio->buffer[2]) {
3794bd9ff19SHans Verkuil /* To check: sometimes radio->curfreq is set to out of range value */
3804bd9ff19SHans Verkuil radio->curfreq = (radio->buffer[1] << 8) | radio->buffer[2];
3814bd9ff19SHans Verkuil radio->curfreq = (radio->curfreq - 0x10) * 200;
3824bd9ff19SHans Verkuil amradio_send_cmd(radio, AMRADIO_STOP_SEARCH,
3834bd9ff19SHans Verkuil 0, NULL, 0, false);
3844bd9ff19SHans Verkuil amradio_set_freq(radio, radio->curfreq);
3854bd9ff19SHans Verkuil retval = 0;
3864bd9ff19SHans Verkuil break;
3874bd9ff19SHans Verkuil }
3884b0cac5eSAlexey Klimov }
3894bd9ff19SHans Verkuil amradio_send_cmd(radio, AMRADIO_STOP_SEARCH, 0, NULL, 0, false);
3904bd9ff19SHans Verkuil amradio_set_freq(radio, radio->curfreq);
3914bd9ff19SHans Verkuil return retval;
3924bd9ff19SHans Verkuil }
3934bd9ff19SHans Verkuil
usb_amradio_s_ctrl(struct v4l2_ctrl * ctrl)3944bd9ff19SHans Verkuil static int usb_amradio_s_ctrl(struct v4l2_ctrl *ctrl)
3954bd9ff19SHans Verkuil {
3964bd9ff19SHans Verkuil struct amradio_device *radio =
3974bd9ff19SHans Verkuil container_of(ctrl->handler, struct amradio_device, hdl);
3984bd9ff19SHans Verkuil
3994bd9ff19SHans Verkuil switch (ctrl->id) {
4004bd9ff19SHans Verkuil case V4L2_CID_AUDIO_MUTE:
4014bd9ff19SHans Verkuil return amradio_set_mute(radio, ctrl->val);
4024bd9ff19SHans Verkuil }
40385578b0fSHans Verkuil
4042aa72f3bSAlexey Klimov return -EINVAL;
40585578b0fSHans Verkuil }
40685578b0fSHans Verkuil
usb_amradio_init(struct amradio_device * radio)4073480130aSAlexey Klimov static int usb_amradio_init(struct amradio_device *radio)
4082aa72f3bSAlexey Klimov {
4092aa72f3bSAlexey Klimov int retval;
4104bd9ff19SHans Verkuil
4112aa72f3bSAlexey Klimov retval = amradio_set_mute(radio, true);
4124aebc289SDavid Ellingsworth if (retval)
4132aa72f3bSAlexey Klimov goto out_err;
4142aa72f3bSAlexey Klimov retval = amradio_set_stereo(radio, true);
4152aa72f3bSAlexey Klimov if (retval)
416502d5016SDavid Ellingsworth goto out_err;
417502d5016SDavid Ellingsworth retval = amradio_set_freq(radio, radio->curfreq);
418502d5016SDavid Ellingsworth if (retval)
419502d5016SDavid Ellingsworth goto out_err;
4204bd9ff19SHans Verkuil return 0;
42116a72f41SDavid Ellingsworth
422502d5016SDavid Ellingsworth out_err:
4234bd9ff19SHans Verkuil amradio_dev_err(&radio->vdev.dev, "initialization failed\n");
42416a72f41SDavid Ellingsworth return retval;
425502d5016SDavid Ellingsworth }
4264bd9ff19SHans Verkuil
4274bd9ff19SHans Verkuil /* Suspend device - stop device. Need to be checked and fixed */
usb_amradio_suspend(struct usb_interface * intf,pm_message_t message)4284bd9ff19SHans Verkuil static int usb_amradio_suspend(struct usb_interface *intf, pm_message_t message)
4294bd9ff19SHans Verkuil {
430502d5016SDavid Ellingsworth struct amradio_device *radio = to_amradio_dev(usb_get_intfdata(intf));
431502d5016SDavid Ellingsworth
43285578b0fSHans Verkuil mutex_lock(&radio->lock);
433502d5016SDavid Ellingsworth if (!radio->muted) {
434502d5016SDavid Ellingsworth amradio_set_mute(radio, true);
435502d5016SDavid Ellingsworth radio->muted = false;
4362aa72f3bSAlexey Klimov }
4372aa72f3bSAlexey Klimov mutex_unlock(&radio->lock);
4382aa72f3bSAlexey Klimov
439a2bdc5e6SHans Verkuil dev_info(&intf->dev, "going into suspend..\n");
4402aa72f3bSAlexey Klimov return 0;
441a682d4cbSHans Verkuil }
44285578b0fSHans Verkuil
4434bd9ff19SHans Verkuil /* Resume device - start device. Need to be checked and fixed */
usb_amradio_resume(struct usb_interface * intf)4444bd9ff19SHans Verkuil static int usb_amradio_resume(struct usb_interface *intf)
445d8970e5fSDavid Ellingsworth {
446a682d4cbSHans Verkuil struct amradio_device *radio = to_amradio_dev(usb_get_intfdata(intf));
4472aa72f3bSAlexey Klimov
448e60b022eSAlexey Klimov mutex_lock(&radio->lock);
4492aa72f3bSAlexey Klimov amradio_set_stereo(radio, radio->stereo);
4502aa72f3bSAlexey Klimov amradio_set_freq(radio, radio->curfreq);
4512aa72f3bSAlexey Klimov
4522aa72f3bSAlexey Klimov if (!radio->muted)
4532aa72f3bSAlexey Klimov amradio_set_mute(radio, false);
4542aa72f3bSAlexey Klimov
455a2bdc5e6SHans Verkuil mutex_unlock(&radio->lock);
4562aa72f3bSAlexey Klimov
457a682d4cbSHans Verkuil dev_info(&intf->dev, "coming out of suspend..\n");
4584bd9ff19SHans Verkuil return 0;
4594bd9ff19SHans Verkuil }
460d8970e5fSDavid Ellingsworth
46116a72f41SDavid Ellingsworth static const struct v4l2_ctrl_ops usb_amradio_ctrl_ops = {
4624bd9ff19SHans Verkuil .s_ctrl = usb_amradio_s_ctrl,
4632aa72f3bSAlexey Klimov };
464a682d4cbSHans Verkuil
465a682d4cbSHans Verkuil /* File system interface */
466e60b022eSAlexey Klimov static const struct v4l2_file_operations usb_amradio_fops = {
4672aa72f3bSAlexey Klimov .owner = THIS_MODULE,
4682aa72f3bSAlexey Klimov .open = v4l2_fh_open,
4692aa72f3bSAlexey Klimov .release = v4l2_fh_release,
47085578b0fSHans Verkuil .poll = v4l2_ctrl_poll,
47185578b0fSHans Verkuil .unlocked_ioctl = video_ioctl2,
47285578b0fSHans Verkuil };
47385578b0fSHans Verkuil
4742aa72f3bSAlexey Klimov static const struct v4l2_ioctl_ops usb_amradio_ioctl_ops = {
475bec43661SHans Verkuil .vidioc_querycap = vidioc_querycap,
4762aa72f3bSAlexey Klimov .vidioc_g_tuner = vidioc_g_tuner,
47785578b0fSHans Verkuil .vidioc_s_tuner = vidioc_s_tuner,
47885578b0fSHans Verkuil .vidioc_g_frequency = vidioc_g_frequency,
47985578b0fSHans Verkuil .vidioc_s_frequency = vidioc_s_frequency,
480361ae54fSHans Verkuil .vidioc_s_hw_freq_seek = vidioc_s_hw_freq_seek,
4812aa72f3bSAlexey Klimov .vidioc_log_status = v4l2_ctrl_log_status,
4822aa72f3bSAlexey Klimov .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
4832aa72f3bSAlexey Klimov .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
4842aa72f3bSAlexey Klimov };
4852aa72f3bSAlexey Klimov
usb_amradio_release(struct v4l2_device * v4l2_dev)4862aa72f3bSAlexey Klimov static void usb_amradio_release(struct v4l2_device *v4l2_dev)
4872aa72f3bSAlexey Klimov {
4882aa72f3bSAlexey Klimov struct amradio_device *radio = to_amradio_dev(v4l2_dev);
4894bd9ff19SHans Verkuil
49085578b0fSHans Verkuil /* free rest memory */
49185578b0fSHans Verkuil v4l2_ctrl_handler_free(&radio->hdl);
49285578b0fSHans Verkuil v4l2_device_unregister(&radio->v4l2_dev);
4932aa72f3bSAlexey Klimov kfree(radio->buffer);
4942aa72f3bSAlexey Klimov kfree(radio);
49585578b0fSHans Verkuil }
496f4e9043eSAlexey Klimov
49785578b0fSHans Verkuil /* check if the device is present and register with v4l and usb if it is */
usb_amradio_probe(struct usb_interface * intf,const struct usb_device_id * id)498b466248dSAlexey Klimov static int usb_amradio_probe(struct usb_interface *intf,
499f4e9043eSAlexey Klimov const struct usb_device_id *id)
50085578b0fSHans Verkuil {
50185578b0fSHans Verkuil struct amradio_device *radio;
502f4e9043eSAlexey Klimov int retval;
503f4e9043eSAlexey Klimov
504f4e9043eSAlexey Klimov radio = kzalloc(sizeof(struct amradio_device), GFP_KERNEL);
505f4e9043eSAlexey Klimov
506a5d69475SAlexey Klimov if (!radio) {
5072aa72f3bSAlexey Klimov dev_err(&intf->dev, "kmalloc for amradio_device failed\n");
5082aa72f3bSAlexey Klimov retval = -ENOMEM;
5092aa72f3bSAlexey Klimov goto err;
5102aa72f3bSAlexey Klimov }
5119aa4d4eaSMarkus Elfring
5122aa72f3bSAlexey Klimov radio->buffer = kmalloc(BUFFER_LENGTH, GFP_KERNEL);
513b466248dSAlexey Klimov
5142aa72f3bSAlexey Klimov if (!radio->buffer) {
5158edafcc6SAlexey Klimov dev_err(&intf->dev, "kmalloc for radio->buffer failed\n");
5168edafcc6SAlexey Klimov retval = -ENOMEM;
5171b8bbb3cSDavid Ellingsworth goto err_nobuf;
5181b8bbb3cSDavid Ellingsworth }
5198edafcc6SAlexey Klimov
5202aa72f3bSAlexey Klimov retval = v4l2_device_register(&intf->dev, &radio->v4l2_dev);
5212aa72f3bSAlexey Klimov if (retval < 0) {
5222aa72f3bSAlexey Klimov dev_err(&intf->dev, "couldn't register v4l2_device\n");
5238edafcc6SAlexey Klimov goto err_v4l2;
5248edafcc6SAlexey Klimov }
5251b8bbb3cSDavid Ellingsworth
5261b8bbb3cSDavid Ellingsworth v4l2_ctrl_handler_init(&radio->hdl, 1);
5272aa72f3bSAlexey Klimov v4l2_ctrl_new_std(&radio->hdl, &usb_amradio_ctrl_ops,
5282aa72f3bSAlexey Klimov V4L2_CID_AUDIO_MUTE, 0, 1, 1, 1);
529d1939e4cSDavid Ellingsworth if (radio->hdl.error) {
530b466248dSAlexey Klimov retval = radio->hdl.error;
531b466248dSAlexey Klimov dev_err(&intf->dev, "couldn't register control\n");
5321b8bbb3cSDavid Ellingsworth goto err_ctrl;
533b466248dSAlexey Klimov }
534b466248dSAlexey Klimov mutex_init(&radio->lock);
53585578b0fSHans Verkuil
53685578b0fSHans Verkuil radio->v4l2_dev.ctrl_handler = &radio->hdl;
53785578b0fSHans Verkuil radio->v4l2_dev.release = usb_amradio_release;
53885578b0fSHans Verkuil strscpy(radio->vdev.name, radio->v4l2_dev.name,
53985578b0fSHans Verkuil sizeof(radio->vdev.name));
54085578b0fSHans Verkuil radio->vdev.v4l2_dev = &radio->v4l2_dev;
54185578b0fSHans Verkuil radio->vdev.fops = &usb_amradio_fops;
54285578b0fSHans Verkuil radio->vdev.ioctl_ops = &usb_amradio_ioctl_ops;
543361ae54fSHans Verkuil radio->vdev.release = video_device_release_empty;
544361ae54fSHans Verkuil radio->vdev.lock = &radio->lock;
54585578b0fSHans Verkuil radio->vdev.device_caps = V4L2_CAP_RADIO | V4L2_CAP_TUNER |
54685578b0fSHans Verkuil V4L2_CAP_HW_FREQ_SEEK;
547c0decac1SMauro Carvalho Chehab
54885578b0fSHans Verkuil radio->usbdev = interface_to_usbdev(intf);
54985578b0fSHans Verkuil radio->intf = intf;
55085578b0fSHans Verkuil usb_set_intfdata(intf, &radio->v4l2_dev);
55185578b0fSHans Verkuil radio->curfreq = 95.16 * FREQ_MUL;
55285578b0fSHans Verkuil
55385578b0fSHans Verkuil video_set_drvdata(&radio->vdev, radio);
554*e83ce300SHans Verkuil retval = usb_amradio_init(radio);
555*e83ce300SHans Verkuil if (retval)
5562aa72f3bSAlexey Klimov goto err_vdev;
5572aa72f3bSAlexey Klimov
558d89ce0d9SOliver Neukum retval = video_register_device(&radio->vdev, VFL_TYPE_RADIO,
55985578b0fSHans Verkuil radio_nr);
5602aa72f3bSAlexey Klimov if (retval < 0) {
5612aa72f3bSAlexey Klimov dev_err(&intf->dev, "could not register video device\n");
56285578b0fSHans Verkuil goto err_vdev;
56385578b0fSHans Verkuil }
56485578b0fSHans Verkuil
56585578b0fSHans Verkuil return 0;
566b466248dSAlexey Klimov
56785578b0fSHans Verkuil err_vdev:
5687a7d92e0SDavid Ellingsworth v4l2_ctrl_handler_free(&radio->hdl);
569a5d69475SAlexey Klimov err_ctrl:
57065c51dc9SAlexey Klimov v4l2_device_unregister(&radio->v4l2_dev);
5711b8bbb3cSDavid Ellingsworth err_v4l2:
5722aa72f3bSAlexey Klimov kfree(radio->buffer);
5732aa72f3bSAlexey Klimov err_nobuf:
5742aa72f3bSAlexey Klimov kfree(radio);
5751b8bbb3cSDavid Ellingsworth err:
5761b8bbb3cSDavid Ellingsworth return retval;
57785578b0fSHans Verkuil }
57885578b0fSHans Verkuil
579d1939e4cSDavid Ellingsworth /* USB Device ID List */
5801b8bbb3cSDavid Ellingsworth static const struct usb_device_id usb_amradio_device_table[] = {
5811b8bbb3cSDavid Ellingsworth { USB_DEVICE_AND_INTERFACE_INFO(USB_AMRADIO_VENDOR, USB_AMRADIO_PRODUCT,
5821b8bbb3cSDavid Ellingsworth USB_CLASS_HID, 0, 0) },
5831b8bbb3cSDavid Ellingsworth { } /* Terminating entry */
5841b8bbb3cSDavid Ellingsworth };
5851b8bbb3cSDavid Ellingsworth
5862aa72f3bSAlexey Klimov MODULE_DEVICE_TABLE(usb, usb_amradio_device_table);
5872aa72f3bSAlexey Klimov
58885578b0fSHans Verkuil /* USB subsystem interface */
5891ab2234eSArvind Yadav static struct usb_driver usb_amradio_driver = {
59085578b0fSHans Verkuil .name = MR800_DRIVER_NAME,
59185578b0fSHans Verkuil .probe = usb_amradio_probe,
59285578b0fSHans Verkuil .disconnect = usb_amradio_disconnect,
59385578b0fSHans Verkuil .suspend = usb_amradio_suspend,
59485578b0fSHans Verkuil .resume = usb_amradio_resume,
59585578b0fSHans Verkuil .reset_resume = usb_amradio_resume,
59685578b0fSHans Verkuil .id_table = usb_amradio_device_table,
59785578b0fSHans Verkuil };
59885578b0fSHans Verkuil
59985578b0fSHans Verkuil module_usb_driver(usb_amradio_driver);
60085578b0fSHans Verkuil