diff options
Diffstat (limited to 'ANDROID_3.4.5/drivers/media/radio/radio-mr800.c')
| -rw-r--r-- | ANDROID_3.4.5/drivers/media/radio/radio-mr800.c | 662 |
1 files changed, 0 insertions, 662 deletions
diff --git a/ANDROID_3.4.5/drivers/media/radio/radio-mr800.c b/ANDROID_3.4.5/drivers/media/radio/radio-mr800.c deleted file mode 100644 index a860a72a..00000000 --- a/ANDROID_3.4.5/drivers/media/radio/radio-mr800.c +++ /dev/null @@ -1,662 +0,0 @@ -/* - * 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 <klimov.linux@gmail.com> - * - * 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 <paravoid@debian.org> 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 <dougsland@gmail.com> and - * David Ellingsworth <david@identd.dyndns.org> - * 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 <linux/kernel.h> -#include <linux/module.h> -#include <linux/init.h> -#include <linux/slab.h> -#include <linux/input.h> -#include <linux/videodev2.h> -#include <media/v4l2-device.h> -#include <media/v4l2-ioctl.h> -#include <linux/usb.h> -#include <linux/mutex.h> - -/* driver and module definitions */ -#define DRIVER_AUTHOR "Alexey Klimov <klimov.linux@gmail.com>" -#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); |