From 871480933a1c28f8a9fed4c4d34d06c439a7a422 Mon Sep 17 00:00:00 2001 From: Srikant Patnaik Date: Sun, 11 Jan 2015 12:28:04 +0530 Subject: Moved, renamed, and deleted files The original directory structure was scattered and unorganized. Changes are basically to make it look like kernel structure. --- drivers/media/radio/radio-mr800.c | 662 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 662 insertions(+) create mode 100644 drivers/media/radio/radio-mr800.c (limited to 'drivers/media/radio/radio-mr800.c') diff --git a/drivers/media/radio/radio-mr800.c b/drivers/media/radio/radio-mr800.c new file mode 100644 index 00000000..a860a72a --- /dev/null +++ b/drivers/media/radio/radio-mr800.c @@ -0,0 +1,662 @@ +/* + * A driver for the AverMedia MR 800 USB FM radio. This device plugs + * into both the USB and an analog audio input, so this thing + * only deals with initialization and frequency setting, the + * audio data has to be handled by a sound driver. + * + * Copyright (c) 2008 Alexey Klimov + * + * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +/* + * Big thanks to authors and contributors of dsbr100.c and radio-si470x.c + * + * When work was looked pretty good, i discover this: + * http://av-usbradio.sourceforge.net/index.php + * http://sourceforge.net/projects/av-usbradio/ + * Latest release of theirs project was in 2005. + * Probably, this driver could be improved through using their + * achievements (specifications given). + * Also, Faidon Liambotis wrote nice driver for this radio + * in 2007. He allowed to use his driver to improve current mr800 radio driver. + * http://kerneltrap.org/mailarchive/linux-usb-devel/2007/10/11/342492 + * + * Version 0.01: First working version. + * It's required to blacklist AverMedia USB Radio + * in usbhid/hid-quirks.c + * Version 0.10: A lot of cleanups and fixes: unpluging the device, + * few mutex locks were added, codinstyle issues, etc. + * Added stereo support. Thanks to + * Douglas Schilling Landgraf and + * David Ellingsworth + * for discussion, help and support. + * Version 0.11: Converted to v4l2_device. + * + * Many things to do: + * - Correct power management of device (suspend & resume) + * - Add code for scanning and smooth tuning + * - Add code for sensitivity value + * - Correct mistakes + * - In Japan another FREQ_MIN and FREQ_MAX + */ + +/* kernel includes */ +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +/* driver and module definitions */ +#define DRIVER_AUTHOR "Alexey Klimov " +#define DRIVER_DESC "AverMedia MR 800 USB FM radio driver" +#define DRIVER_VERSION "0.1.2" + +MODULE_AUTHOR(DRIVER_AUTHOR); +MODULE_DESCRIPTION(DRIVER_DESC); +MODULE_LICENSE("GPL"); +MODULE_VERSION(DRIVER_VERSION); + +#define USB_AMRADIO_VENDOR 0x07ca +#define USB_AMRADIO_PRODUCT 0xb800 + +/* dev_warn macro with driver name */ +#define MR800_DRIVER_NAME "radio-mr800" +#define amradio_dev_warn(dev, fmt, arg...) \ + dev_warn(dev, MR800_DRIVER_NAME " - " fmt, ##arg) + +#define amradio_dev_err(dev, fmt, arg...) \ + dev_err(dev, MR800_DRIVER_NAME " - " fmt, ##arg) + +/* Probably USB_TIMEOUT should be modified in module parameter */ +#define BUFFER_LENGTH 8 +#define USB_TIMEOUT 500 + +/* Frequency limits in MHz -- these are European values. For Japanese +devices, that would be 76 and 91. */ +#define FREQ_MIN 87.5 +#define FREQ_MAX 108.0 +#define FREQ_MUL 16000 + +/* + * Commands that device should understand + * List isn't full and will be updated with implementation of new functions + */ +#define AMRADIO_SET_FREQ 0xa4 +#define AMRADIO_SET_MUTE 0xab +#define AMRADIO_SET_MONO 0xae + +/* Comfortable defines for amradio_set_mute */ +#define AMRADIO_START 0x00 +#define AMRADIO_STOP 0x01 + +/* Comfortable defines for amradio_set_stereo */ +#define WANT_STEREO 0x00 +#define WANT_MONO 0x01 + +/* module parameter */ +static int radio_nr = -1; +module_param(radio_nr, int, 0); +MODULE_PARM_DESC(radio_nr, "Radio Nr"); + +static int usb_amradio_probe(struct usb_interface *intf, + const struct usb_device_id *id); +static void usb_amradio_disconnect(struct usb_interface *intf); +static int usb_amradio_open(struct file *file); +static int usb_amradio_close(struct file *file); +static int usb_amradio_suspend(struct usb_interface *intf, + pm_message_t message); +static int usb_amradio_resume(struct usb_interface *intf); + +/* Data for one (physical) device */ +struct amradio_device { + /* reference to USB and video device */ + struct usb_device *usbdev; + struct usb_interface *intf; + struct video_device videodev; + struct v4l2_device v4l2_dev; + + unsigned char *buffer; + struct mutex lock; /* buffer locking */ + int curfreq; + int stereo; + int muted; + int initialized; +}; + +static inline struct amradio_device *to_amradio_dev(struct v4l2_device *v4l2_dev) +{ + return container_of(v4l2_dev, struct amradio_device, v4l2_dev); +} + +/* USB Device ID List */ +static struct usb_device_id usb_amradio_device_table[] = { + {USB_DEVICE_AND_INTERFACE_INFO(USB_AMRADIO_VENDOR, USB_AMRADIO_PRODUCT, + USB_CLASS_HID, 0, 0) }, + { } /* Terminating entry */ +}; + +MODULE_DEVICE_TABLE(usb, usb_amradio_device_table); + +/* USB subsystem interface */ +static struct usb_driver usb_amradio_driver = { + .name = MR800_DRIVER_NAME, + .probe = usb_amradio_probe, + .disconnect = usb_amradio_disconnect, + .suspend = usb_amradio_suspend, + .resume = usb_amradio_resume, + .reset_resume = usb_amradio_resume, + .id_table = usb_amradio_device_table, + .supports_autosuspend = 1, +}; + +/* switch on/off the radio. Send 8 bytes to device */ +static int amradio_set_mute(struct amradio_device *radio, char argument) +{ + int retval; + int size; + + radio->buffer[0] = 0x00; + radio->buffer[1] = 0x55; + radio->buffer[2] = 0xaa; + radio->buffer[3] = 0x00; + radio->buffer[4] = AMRADIO_SET_MUTE; + radio->buffer[5] = argument; + radio->buffer[6] = 0x00; + radio->buffer[7] = 0x00; + + retval = usb_bulk_msg(radio->usbdev, usb_sndintpipe(radio->usbdev, 2), + (void *) (radio->buffer), BUFFER_LENGTH, &size, USB_TIMEOUT); + + if (retval < 0 || size != BUFFER_LENGTH) { + amradio_dev_warn(&radio->videodev.dev, "set mute failed\n"); + return retval; + } + + radio->muted = argument; + + return retval; +} + +/* set a frequency, freq is defined by v4l's TUNER_LOW, i.e. 1/16th kHz */ +static int amradio_setfreq(struct amradio_device *radio, int freq) +{ + int retval; + int size; + unsigned short freq_send = 0x10 + (freq >> 3) / 25; + + radio->buffer[0] = 0x00; + radio->buffer[1] = 0x55; + radio->buffer[2] = 0xaa; + radio->buffer[3] = 0x03; + radio->buffer[4] = AMRADIO_SET_FREQ; + radio->buffer[5] = 0x00; + radio->buffer[6] = 0x00; + radio->buffer[7] = 0x08; + + retval = usb_bulk_msg(radio->usbdev, usb_sndintpipe(radio->usbdev, 2), + (void *) (radio->buffer), BUFFER_LENGTH, &size, USB_TIMEOUT); + + if (retval < 0 || size != BUFFER_LENGTH) + goto out_err; + + /* frequency is calculated from freq_send and placed in first 2 bytes */ + radio->buffer[0] = (freq_send >> 8) & 0xff; + radio->buffer[1] = freq_send & 0xff; + radio->buffer[2] = 0x01; + radio->buffer[3] = 0x00; + radio->buffer[4] = 0x00; + /* 5 and 6 bytes of buffer already = 0x00 */ + radio->buffer[7] = 0x00; + + retval = usb_bulk_msg(radio->usbdev, usb_sndintpipe(radio->usbdev, 2), + (void *) (radio->buffer), BUFFER_LENGTH, &size, USB_TIMEOUT); + + if (retval < 0 || size != BUFFER_LENGTH) + goto out_err; + + radio->curfreq = freq; + goto out; + +out_err: + amradio_dev_warn(&radio->videodev.dev, "set frequency failed\n"); +out: + return retval; +} + +static int amradio_set_stereo(struct amradio_device *radio, char argument) +{ + int retval; + int size; + + radio->buffer[0] = 0x00; + radio->buffer[1] = 0x55; + radio->buffer[2] = 0xaa; + radio->buffer[3] = 0x00; + radio->buffer[4] = AMRADIO_SET_MONO; + radio->buffer[5] = argument; + radio->buffer[6] = 0x00; + radio->buffer[7] = 0x00; + + retval = usb_bulk_msg(radio->usbdev, usb_sndintpipe(radio->usbdev, 2), + (void *) (radio->buffer), BUFFER_LENGTH, &size, USB_TIMEOUT); + + if (retval < 0 || size != BUFFER_LENGTH) { + amradio_dev_warn(&radio->videodev.dev, "set stereo failed\n"); + return retval; + } + + if (argument == WANT_STEREO) + radio->stereo = 1; + else + radio->stereo = 0; + + return retval; +} + +/* Handle unplugging the device. + * We call video_unregister_device in any case. + * The last function called in this procedure is + * usb_amradio_device_release. + */ +static void usb_amradio_disconnect(struct usb_interface *intf) +{ + struct amradio_device *radio = to_amradio_dev(usb_get_intfdata(intf)); + + mutex_lock(&radio->lock); + /* increase the device node's refcount */ + get_device(&radio->videodev.dev); + v4l2_device_disconnect(&radio->v4l2_dev); + video_unregister_device(&radio->videodev); + mutex_unlock(&radio->lock); + /* decrease the device node's refcount, allowing it to be released */ + put_device(&radio->videodev.dev); +} + +/* vidioc_querycap - query device capabilities */ +static int vidioc_querycap(struct file *file, void *priv, + struct v4l2_capability *v) +{ + struct amradio_device *radio = file->private_data; + + strlcpy(v->driver, "radio-mr800", sizeof(v->driver)); + strlcpy(v->card, "AverMedia MR 800 USB FM Radio", sizeof(v->card)); + usb_make_path(radio->usbdev, v->bus_info, sizeof(v->bus_info)); + v->capabilities = V4L2_CAP_TUNER; + return 0; +} + +/* vidioc_g_tuner - get tuner attributes */ +static int vidioc_g_tuner(struct file *file, void *priv, + struct v4l2_tuner *v) +{ + struct amradio_device *radio = file->private_data; + int retval; + + if (v->index > 0) + return -EINVAL; + +/* TODO: Add function which look is signal stereo or not + * amradio_getstat(radio); + */ + +/* we call amradio_set_stereo to set radio->stereo + * Honestly, amradio_getstat should cover this in future and + * amradio_set_stereo shouldn't be here + */ + retval = amradio_set_stereo(radio, WANT_STEREO); + + strcpy(v->name, "FM"); + v->type = V4L2_TUNER_RADIO; + v->rangelow = FREQ_MIN * FREQ_MUL; + v->rangehigh = FREQ_MAX * FREQ_MUL; + v->rxsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO; + v->capability = V4L2_TUNER_CAP_LOW; + if (radio->stereo) + v->audmode = V4L2_TUNER_MODE_STEREO; + else + v->audmode = V4L2_TUNER_MODE_MONO; + v->signal = 0xffff; /* Can't get the signal strength, sad.. */ + v->afc = 0; /* Don't know what is this */ + + return retval; +} + +/* vidioc_s_tuner - set tuner attributes */ +static int vidioc_s_tuner(struct file *file, void *priv, + struct v4l2_tuner *v) +{ + struct amradio_device *radio = file->private_data; + int retval = -EINVAL; + + if (v->index > 0) + return -EINVAL; + + /* mono/stereo selector */ + switch (v->audmode) { + case V4L2_TUNER_MODE_MONO: + retval = amradio_set_stereo(radio, WANT_MONO); + break; + case V4L2_TUNER_MODE_STEREO: + retval = amradio_set_stereo(radio, WANT_STEREO); + break; + } + + return retval; +} + +/* vidioc_s_frequency - set tuner radio frequency */ +static int vidioc_s_frequency(struct file *file, void *priv, + struct v4l2_frequency *f) +{ + struct amradio_device *radio = file->private_data; + + if (f->tuner != 0 || f->type != V4L2_TUNER_RADIO) + return -EINVAL; + return amradio_setfreq(radio, f->frequency); +} + +/* vidioc_g_frequency - get tuner radio frequency */ +static int vidioc_g_frequency(struct file *file, void *priv, + struct v4l2_frequency *f) +{ + struct amradio_device *radio = file->private_data; + + if (f->tuner != 0) + return -EINVAL; + f->type = V4L2_TUNER_RADIO; + f->frequency = radio->curfreq; + + return 0; +} + +/* vidioc_queryctrl - enumerate control items */ +static int vidioc_queryctrl(struct file *file, void *priv, + struct v4l2_queryctrl *qc) +{ + switch (qc->id) { + case V4L2_CID_AUDIO_MUTE: + return v4l2_ctrl_query_fill(qc, 0, 1, 1, 1); + } + + return -EINVAL; +} + +/* vidioc_g_ctrl - get the value of a control */ +static int vidioc_g_ctrl(struct file *file, void *priv, + struct v4l2_control *ctrl) +{ + struct amradio_device *radio = file->private_data; + + switch (ctrl->id) { + case V4L2_CID_AUDIO_MUTE: + ctrl->value = radio->muted; + return 0; + } + + return -EINVAL; +} + +/* vidioc_s_ctrl - set the value of a control */ +static int vidioc_s_ctrl(struct file *file, void *priv, + struct v4l2_control *ctrl) +{ + struct amradio_device *radio = file->private_data; + int retval = -EINVAL; + + switch (ctrl->id) { + case V4L2_CID_AUDIO_MUTE: + if (ctrl->value) + retval = amradio_set_mute(radio, AMRADIO_STOP); + else + retval = amradio_set_mute(radio, AMRADIO_START); + + break; + } + + return retval; +} + +/* vidioc_g_audio - get audio attributes */ +static int vidioc_g_audio(struct file *file, void *priv, + struct v4l2_audio *a) +{ + if (a->index > 1) + return -EINVAL; + + strcpy(a->name, "Radio"); + a->capability = V4L2_AUDCAP_STEREO; + return 0; +} + +/* vidioc_s_audio - set audio attributes */ +static int vidioc_s_audio(struct file *file, void *priv, + struct v4l2_audio *a) +{ + if (a->index != 0) + return -EINVAL; + return 0; +} + +/* vidioc_g_input - get input */ +static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i) +{ + *i = 0; + return 0; +} + +/* vidioc_s_input - set input */ +static int vidioc_s_input(struct file *filp, void *priv, unsigned int i) +{ + if (i != 0) + return -EINVAL; + return 0; +} + +static int usb_amradio_init(struct amradio_device *radio) +{ + int retval; + + retval = amradio_set_mute(radio, AMRADIO_STOP); + if (retval) + goto out_err; + + retval = amradio_set_stereo(radio, WANT_STEREO); + if (retval) + goto out_err; + + radio->initialized = 1; + goto out; + +out_err: + amradio_dev_err(&radio->videodev.dev, "initialization failed\n"); +out: + return retval; +} + +/* open device - amradio_start() and amradio_setfreq() */ +static int usb_amradio_open(struct file *file) +{ + struct amradio_device *radio = video_drvdata(file); + int retval; + + file->private_data = radio; + retval = usb_autopm_get_interface(radio->intf); + if (retval) + return retval; + + if (unlikely(!radio->initialized)) { + retval = usb_amradio_init(radio); + if (retval) + usb_autopm_put_interface(radio->intf); + } + return retval; +} + +/*close device */ +static int usb_amradio_close(struct file *file) +{ + struct amradio_device *radio = file->private_data; + + if (video_is_registered(&radio->videodev)) + usb_autopm_put_interface(radio->intf); + return 0; +} + +/* Suspend device - stop device. Need to be checked and fixed */ +static int usb_amradio_suspend(struct usb_interface *intf, pm_message_t message) +{ + struct amradio_device *radio = to_amradio_dev(usb_get_intfdata(intf)); + + mutex_lock(&radio->lock); + if (!radio->muted && radio->initialized) { + amradio_set_mute(radio, AMRADIO_STOP); + radio->muted = 0; + } + mutex_unlock(&radio->lock); + + dev_info(&intf->dev, "going into suspend..\n"); + return 0; +} + +/* Resume device - start device. Need to be checked and fixed */ +static int usb_amradio_resume(struct usb_interface *intf) +{ + struct amradio_device *radio = to_amradio_dev(usb_get_intfdata(intf)); + + mutex_lock(&radio->lock); + if (unlikely(!radio->initialized)) + goto unlock; + + if (radio->stereo) + amradio_set_stereo(radio, WANT_STEREO); + else + amradio_set_stereo(radio, WANT_MONO); + + amradio_setfreq(radio, radio->curfreq); + + if (!radio->muted) + amradio_set_mute(radio, AMRADIO_START); + +unlock: + mutex_unlock(&radio->lock); + + dev_info(&intf->dev, "coming out of suspend..\n"); + return 0; +} + +/* File system interface */ +static const struct v4l2_file_operations usb_amradio_fops = { + .owner = THIS_MODULE, + .open = usb_amradio_open, + .release = usb_amradio_close, + .unlocked_ioctl = video_ioctl2, +}; + +static const struct v4l2_ioctl_ops usb_amradio_ioctl_ops = { + .vidioc_querycap = vidioc_querycap, + .vidioc_g_tuner = vidioc_g_tuner, + .vidioc_s_tuner = vidioc_s_tuner, + .vidioc_g_frequency = vidioc_g_frequency, + .vidioc_s_frequency = vidioc_s_frequency, + .vidioc_queryctrl = vidioc_queryctrl, + .vidioc_g_ctrl = vidioc_g_ctrl, + .vidioc_s_ctrl = vidioc_s_ctrl, + .vidioc_g_audio = vidioc_g_audio, + .vidioc_s_audio = vidioc_s_audio, + .vidioc_g_input = vidioc_g_input, + .vidioc_s_input = vidioc_s_input, +}; + +static void usb_amradio_video_device_release(struct video_device *videodev) +{ + struct amradio_device *radio = video_get_drvdata(videodev); + + /* free rest memory */ + kfree(radio->buffer); + kfree(radio); +} + +/* check if the device is present and register with v4l and usb if it is */ +static int usb_amradio_probe(struct usb_interface *intf, + const struct usb_device_id *id) +{ + struct amradio_device *radio; + int retval = 0; + + radio = kzalloc(sizeof(struct amradio_device), GFP_KERNEL); + + if (!radio) { + dev_err(&intf->dev, "kmalloc for amradio_device failed\n"); + retval = -ENOMEM; + goto err; + } + + radio->buffer = kmalloc(BUFFER_LENGTH, GFP_KERNEL); + + if (!radio->buffer) { + dev_err(&intf->dev, "kmalloc for radio->buffer failed\n"); + retval = -ENOMEM; + goto err_nobuf; + } + + retval = v4l2_device_register(&intf->dev, &radio->v4l2_dev); + if (retval < 0) { + dev_err(&intf->dev, "couldn't register v4l2_device\n"); + goto err_v4l2; + } + + mutex_init(&radio->lock); + + strlcpy(radio->videodev.name, radio->v4l2_dev.name, + sizeof(radio->videodev.name)); + radio->videodev.v4l2_dev = &radio->v4l2_dev; + radio->videodev.fops = &usb_amradio_fops; + radio->videodev.ioctl_ops = &usb_amradio_ioctl_ops; + radio->videodev.release = usb_amradio_video_device_release; + radio->videodev.lock = &radio->lock; + + radio->usbdev = interface_to_usbdev(intf); + radio->intf = intf; + radio->curfreq = 95.16 * FREQ_MUL; + + video_set_drvdata(&radio->videodev, radio); + + retval = video_register_device(&radio->videodev, VFL_TYPE_RADIO, + radio_nr); + if (retval < 0) { + dev_err(&intf->dev, "could not register video device\n"); + goto err_vdev; + } + + return 0; + +err_vdev: + v4l2_device_unregister(&radio->v4l2_dev); +err_v4l2: + kfree(radio->buffer); +err_nobuf: + kfree(radio); +err: + return retval; +} + +module_usb_driver(usb_amradio_driver); -- cgit