// SPDX-License-Identifier: GPL-2.0-only /* * Copyright 2013 Cisco Systems, Inc. and/or its affiliates. All rights reserved. */ #include <linux/kernel.h> #include <linux/module.h> #include <linux/init.h> #include <linux/slab.h> #include <linux/input.h> #include <linux/usb.h> #include <linux/hid.h> #include <linux/mutex.h> #include <linux/videodev2.h> #include <asm/unaligned.h> #include <media/v4l2-device.h> #include <media/v4l2-ioctl.h> #include <media/v4l2-ctrls.h> #include <media/v4l2-event.h> /* * 'Thanko's Raremono' is a Japanese si4734-based AM/FM/SW USB receiver: * * http://www.raremono.jp/product/484.html/ * * The USB protocol has been reversed engineered using wireshark, initially * by Dinesh Ram <[email protected]> and finished by Hans Verkuil * <[email protected]>. * * Sadly the firmware used in this product hides lots of goodies since the * si4734 has more features than are supported by the firmware. Oh well... */ /* driver and module definitions */ MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …; /* * The Device announces itself as Cygnal Integrated Products, Inc. * * The vendor and product IDs (and in fact all other lsusb information as * well) are identical to the si470x Silicon Labs USB FM Radio Reference * Design board, even though this card has a si4734 device. Clearly the * designer of this product never bothered to change the USB IDs. */ /* USB Device ID List */ static const struct usb_device_id usb_raremono_device_table[] = …; MODULE_DEVICE_TABLE(usb, usb_raremono_device_table); #define BUFFER_LENGTH … /* Timeout is set to a high value, could probably be reduced. Need more tests */ #define USB_TIMEOUT … /* Frequency limits in KHz */ #define FM_FREQ_RANGE_LOW … #define FM_FREQ_RANGE_HIGH … #define AM_FREQ_RANGE_LOW … #define AM_FREQ_RANGE_HIGH … #define SW_FREQ_RANGE_LOW … #define SW_FREQ_RANGE_HIGH … enum { … }; static const struct v4l2_frequency_band bands[] = …; struct raremono_device { … }; static inline struct raremono_device *to_raremono_dev(struct v4l2_device *v4l2_dev) { … } /* Set frequency. */ static int raremono_cmd_main(struct raremono_device *radio, unsigned band, unsigned freq) { … } /* Handle unplugging the device. * We call video_unregister_device in any case. * The last function called in this procedure is * usb_raremono_device_release. */ static void usb_raremono_disconnect(struct usb_interface *intf) { … } /* * Linux Video interface */ static int vidioc_querycap(struct file *file, void *priv, struct v4l2_capability *v) { … } static int vidioc_enum_freq_bands(struct file *file, void *priv, struct v4l2_frequency_band *band) { … } static int vidioc_g_tuner(struct file *file, void *priv, struct v4l2_tuner *v) { … } static int vidioc_s_tuner(struct file *file, void *priv, const struct v4l2_tuner *v) { … } static int vidioc_s_frequency(struct file *file, void *priv, const struct v4l2_frequency *f) { … } static int vidioc_g_frequency(struct file *file, void *priv, struct v4l2_frequency *f) { … } static void raremono_device_release(struct v4l2_device *v4l2_dev) { … } /* File system interface */ static const struct v4l2_file_operations usb_raremono_fops = …; static const struct v4l2_ioctl_ops usb_raremono_ioctl_ops = …; /* check if the device is present and register with v4l and usb if it is */ static int usb_raremono_probe(struct usb_interface *intf, const struct usb_device_id *id) { … } /* USB subsystem interface */ static struct usb_driver usb_raremono_driver = …; module_usb_driver(…) …;
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