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[media] radio-raremono: add support for 'Thanko's Raremono' AM/FM/SW USB device
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Cc: Dinesh Ram <dinesh.ram@cern.ch> Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
This commit is contained in:
Hans Verkuil
Mauro Carvalho Chehab
parent
5df2def550
commit
21326c461e
3 changed files with 402 additions and 0 deletions
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@ -129,6 +129,20 @@ config USB_KEENE
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To compile this driver as a module, choose M here: the
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module will be called radio-keene.
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config USB_RAREMONO
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tristate "Thanko's Raremono AM/FM/SW radio support"
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depends on USB && VIDEO_V4L2
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---help---
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The 'Thanko's Raremono' device contains the Si4734 chip from Silicon Labs Inc.
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It is one of the very few or perhaps the only consumer USB radio device
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to receive the AM/FM/SW bands.
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Say Y here if you want to connect this type of AM/FM/SW receiver
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to your computer's USB port.
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To compile this driver as a module, choose M here: the
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module will be called radio-raremono.
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config USB_MA901
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tristate "Masterkit MA901 USB FM radio support"
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depends on USB && VIDEO_V4L2
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@ -32,6 +32,7 @@ obj-$(CONFIG_RADIO_TIMBERDALE) += radio-timb.o
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obj-$(CONFIG_RADIO_WL1273) += radio-wl1273.o
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obj-$(CONFIG_RADIO_WL128X) += wl128x/
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obj-$(CONFIG_RADIO_TEA575X) += tea575x.o
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obj-$(CONFIG_USB_RAREMONO) += radio-raremono.o
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shark2-objs := radio-shark2.o radio-tea5777.o
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387
drivers/media/radio/radio-raremono.c
Normal file
387
drivers/media/radio/radio-raremono.c
Normal file
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@ -0,0 +1,387 @@
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/*
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* Copyright 2013 Cisco Systems, Inc. and/or its affiliates. All rights reserved.
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*
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* This program is free software; you may redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/input.h>
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#include <linux/usb.h>
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#include <linux/hid.h>
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#include <linux/mutex.h>
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#include <linux/videodev2.h>
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#include <asm/unaligned.h>
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#include <media/v4l2-device.h>
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#include <media/v4l2-ioctl.h>
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#include <media/v4l2-ctrls.h>
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#include <media/v4l2-event.h>
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/*
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* 'Thanko's Raremono' is a Japanese si4734-based AM/FM/SW USB receiver:
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*
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* http://www.raremono.jp/product/484.html/
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*
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* The USB protocol has been reversed engineered using wireshark, initially
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* by Dinesh Ram <dinesh.ram@cern.ch> and finished by Hans Verkuil
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* <hverkuil@xs4all.nl>.
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*
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* Sadly the firmware used in this product hides lots of goodies since the
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* si4734 has more features than are supported by the firmware. Oh well...
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*/
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/* driver and module definitions */
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MODULE_AUTHOR("Hans Verkuil <hverkuil@xs4all.nl>");
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MODULE_DESCRIPTION("Thanko's Raremono AM/FM/SW Receiver USB driver");
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MODULE_LICENSE("GPL v2");
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/*
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* The Device announces itself as Cygnal Integrated Products, Inc.
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*
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* The vendor and product IDs (and in fact all other lsusb information as
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* well) are identical to the si470x Silicon Labs USB FM Radio Reference
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* Design board, even though this card has a si4734 device. Clearly the
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* designer of this product never bothered to change the USB IDs.
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*/
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/* USB Device ID List */
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static struct usb_device_id usb_raremono_device_table[] = {
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{USB_DEVICE_AND_INTERFACE_INFO(0x10c4, 0x818a, USB_CLASS_HID, 0, 0) },
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{ } /* Terminating entry */
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};
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MODULE_DEVICE_TABLE(usb, usb_raremono_device_table);
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#define BUFFER_LENGTH 64
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/* Timeout is set to a high value, could probably be reduced. Need more tests */
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#define USB_TIMEOUT 10000
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/* Frequency limits in KHz */
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#define FM_FREQ_RANGE_LOW 64000
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#define FM_FREQ_RANGE_HIGH 108000
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#define AM_FREQ_RANGE_LOW 520
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#define AM_FREQ_RANGE_HIGH 1710
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#define SW_FREQ_RANGE_LOW 2300
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#define SW_FREQ_RANGE_HIGH 26100
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enum { BAND_FM, BAND_AM, BAND_SW };
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static const struct v4l2_frequency_band bands[] = {
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/* Band FM */
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{
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.type = V4L2_TUNER_RADIO,
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.index = 0,
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.capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO |
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V4L2_TUNER_CAP_FREQ_BANDS,
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.rangelow = FM_FREQ_RANGE_LOW * 16,
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.rangehigh = FM_FREQ_RANGE_HIGH * 16,
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.modulation = V4L2_BAND_MODULATION_FM,
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},
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/* Band AM */
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{
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.type = V4L2_TUNER_RADIO,
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.index = 1,
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.capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_FREQ_BANDS,
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.rangelow = AM_FREQ_RANGE_LOW * 16,
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.rangehigh = AM_FREQ_RANGE_HIGH * 16,
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.modulation = V4L2_BAND_MODULATION_AM,
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},
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/* Band SW */
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{
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.type = V4L2_TUNER_RADIO,
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.index = 2,
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.capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_FREQ_BANDS,
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.rangelow = SW_FREQ_RANGE_LOW * 16,
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.rangehigh = SW_FREQ_RANGE_HIGH * 16,
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.modulation = V4L2_BAND_MODULATION_AM,
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},
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};
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struct raremono_device {
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struct usb_device *usbdev;
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struct usb_interface *intf;
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struct video_device vdev;
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struct v4l2_device v4l2_dev;
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struct mutex lock;
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u8 *buffer;
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u32 band;
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unsigned curfreq;
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};
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static inline struct raremono_device *to_raremono_dev(struct v4l2_device *v4l2_dev)
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{
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return container_of(v4l2_dev, struct raremono_device, v4l2_dev);
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}
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/* Set frequency. */
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static int raremono_cmd_main(struct raremono_device *radio, unsigned band, unsigned freq)
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{
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unsigned band_offset;
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int ret;
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switch (band) {
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case BAND_FM:
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band_offset = 1;
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freq /= 10;
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break;
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case BAND_AM:
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band_offset = 0;
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break;
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default:
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band_offset = 2;
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break;
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}
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radio->buffer[0] = 0x04 + band_offset;
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radio->buffer[1] = freq >> 8;
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radio->buffer[2] = freq & 0xff;
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ret = usb_control_msg(radio->usbdev, usb_sndctrlpipe(radio->usbdev, 0),
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HID_REQ_SET_REPORT,
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USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_OUT,
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0x0300 + radio->buffer[0], 2,
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radio->buffer, 3, USB_TIMEOUT);
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if (ret < 0) {
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dev_warn(radio->v4l2_dev.dev, "%s failed (%d)\n", __func__, ret);
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return ret;
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}
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radio->curfreq = (band == BAND_FM) ? freq * 10 : freq;
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return 0;
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}
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/* Handle unplugging the device.
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* We call video_unregister_device in any case.
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* The last function called in this procedure is
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* usb_raremono_device_release.
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*/
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static void usb_raremono_disconnect(struct usb_interface *intf)
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{
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struct raremono_device *radio = to_raremono_dev(usb_get_intfdata(intf));
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dev_info(&intf->dev, "Thanko's Raremono disconnected\n");
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mutex_lock(&radio->lock);
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usb_set_intfdata(intf, NULL);
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video_unregister_device(&radio->vdev);
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v4l2_device_disconnect(&radio->v4l2_dev);
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mutex_unlock(&radio->lock);
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v4l2_device_put(&radio->v4l2_dev);
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}
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/*
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* Linux Video interface
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*/
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static int vidioc_querycap(struct file *file, void *priv,
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struct v4l2_capability *v)
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{
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struct raremono_device *radio = video_drvdata(file);
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strlcpy(v->driver, "radio-raremono", sizeof(v->driver));
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strlcpy(v->card, "Thanko's Raremono", sizeof(v->card));
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usb_make_path(radio->usbdev, v->bus_info, sizeof(v->bus_info));
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v->device_caps = V4L2_CAP_TUNER | V4L2_CAP_RADIO;
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v->capabilities = v->device_caps | V4L2_CAP_DEVICE_CAPS;
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return 0;
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}
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static int vidioc_enum_freq_bands(struct file *file, void *priv,
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struct v4l2_frequency_band *band)
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{
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if (band->tuner != 0)
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return -EINVAL;
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if (band->index >= ARRAY_SIZE(bands))
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return -EINVAL;
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*band = bands[band->index];
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return 0;
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}
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static int vidioc_g_tuner(struct file *file, void *priv,
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struct v4l2_tuner *v)
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{
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struct raremono_device *radio = video_drvdata(file);
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int ret;
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if (v->index > 0)
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return -EINVAL;
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strlcpy(v->name, "AM/FM/SW", sizeof(v->name));
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v->capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO |
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V4L2_TUNER_CAP_FREQ_BANDS;
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v->rangelow = AM_FREQ_RANGE_LOW * 16;
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v->rangehigh = FM_FREQ_RANGE_HIGH * 16;
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v->rxsubchans = V4L2_TUNER_SUB_STEREO | V4L2_TUNER_SUB_MONO;
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v->audmode = (radio->curfreq < FM_FREQ_RANGE_LOW) ?
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V4L2_TUNER_MODE_MONO : V4L2_TUNER_MODE_STEREO;
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memset(radio->buffer, 1, BUFFER_LENGTH);
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ret = usb_control_msg(radio->usbdev, usb_rcvctrlpipe(radio->usbdev, 0),
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1, 0xa1, 0x030d, 2, radio->buffer, BUFFER_LENGTH, USB_TIMEOUT);
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if (ret < 0) {
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dev_warn(radio->v4l2_dev.dev, "%s failed (%d)\n", __func__, ret);
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return ret;
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}
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v->signal = ((radio->buffer[1] & 0xf) << 8 | radio->buffer[2]) << 4;
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return 0;
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}
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static int vidioc_s_tuner(struct file *file, void *priv,
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const struct v4l2_tuner *v)
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{
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return v->index ? -EINVAL : 0;
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}
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static int vidioc_s_frequency(struct file *file, void *priv,
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const struct v4l2_frequency *f)
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{
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struct raremono_device *radio = video_drvdata(file);
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u32 freq = f->frequency;
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unsigned band;
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if (f->tuner != 0 || f->type != V4L2_TUNER_RADIO)
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return -EINVAL;
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if (f->frequency >= (FM_FREQ_RANGE_LOW + SW_FREQ_RANGE_HIGH) * 8)
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band = BAND_FM;
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else if (f->frequency <= (AM_FREQ_RANGE_HIGH + SW_FREQ_RANGE_LOW) * 8)
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band = BAND_AM;
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else
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band = BAND_SW;
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freq = clamp_t(u32, f->frequency, bands[band].rangelow, bands[band].rangehigh);
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return raremono_cmd_main(radio, band, freq / 16);
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}
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static int vidioc_g_frequency(struct file *file, void *priv,
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struct v4l2_frequency *f)
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{
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struct raremono_device *radio = video_drvdata(file);
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if (f->tuner != 0)
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return -EINVAL;
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f->type = V4L2_TUNER_RADIO;
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f->frequency = radio->curfreq * 16;
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return 0;
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}
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/* File system interface */
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static const struct v4l2_file_operations usb_raremono_fops = {
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.owner = THIS_MODULE,
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.open = v4l2_fh_open,
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.release = v4l2_fh_release,
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.unlocked_ioctl = video_ioctl2,
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};
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static const struct v4l2_ioctl_ops usb_raremono_ioctl_ops = {
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.vidioc_querycap = vidioc_querycap,
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.vidioc_g_tuner = vidioc_g_tuner,
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.vidioc_s_tuner = vidioc_s_tuner,
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.vidioc_g_frequency = vidioc_g_frequency,
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.vidioc_s_frequency = vidioc_s_frequency,
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.vidioc_enum_freq_bands = vidioc_enum_freq_bands,
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};
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/* check if the device is present and register with v4l and usb if it is */
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static int usb_raremono_probe(struct usb_interface *intf,
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const struct usb_device_id *id)
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{
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struct raremono_device *radio;
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int retval = 0;
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radio = devm_kzalloc(&intf->dev, sizeof(struct raremono_device), GFP_KERNEL);
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if (radio)
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radio->buffer = devm_kmalloc(&intf->dev, BUFFER_LENGTH, GFP_KERNEL);
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if (!radio || !radio->buffer)
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return -ENOMEM;
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radio->usbdev = interface_to_usbdev(intf);
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radio->intf = intf;
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/*
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* This device uses the same USB IDs as the si470x SiLabs reference
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* design. So do an additional check: attempt to read the device ID
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* from the si470x: the lower 12 bits are 0x0242 for the si470x. The
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* Raremono always returns 0x0800 (the meaning of that is unknown, but
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* at least it works).
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*
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* We use this check to determine which device we are dealing with.
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*/
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msleep(20);
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retval = usb_control_msg(radio->usbdev,
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usb_rcvctrlpipe(radio->usbdev, 0),
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HID_REQ_GET_REPORT,
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USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,
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1, 2,
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radio->buffer, 3, 500);
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if (retval != 3 ||
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(get_unaligned_be16(&radio->buffer[1]) & 0xfff) == 0x0242) {
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dev_info(&intf->dev, "this is not Thanko's Raremono.\n");
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return -ENODEV;
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}
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dev_info(&intf->dev, "Thanko's Raremono connected: (%04X:%04X)\n",
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id->idVendor, id->idProduct);
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retval = v4l2_device_register(&intf->dev, &radio->v4l2_dev);
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if (retval < 0) {
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dev_err(&intf->dev, "couldn't register v4l2_device\n");
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return retval;
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}
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mutex_init(&radio->lock);
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strlcpy(radio->vdev.name, radio->v4l2_dev.name,
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sizeof(radio->vdev.name));
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radio->vdev.v4l2_dev = &radio->v4l2_dev;
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radio->vdev.fops = &usb_raremono_fops;
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radio->vdev.ioctl_ops = &usb_raremono_ioctl_ops;
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radio->vdev.lock = &radio->lock;
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radio->vdev.release = video_device_release_empty;
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usb_set_intfdata(intf, &radio->v4l2_dev);
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video_set_drvdata(&radio->vdev, radio);
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set_bit(V4L2_FL_USE_FH_PRIO, &radio->vdev.flags);
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raremono_cmd_main(radio, BAND_FM, 95160);
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retval = video_register_device(&radio->vdev, VFL_TYPE_RADIO, -1);
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if (retval == 0) {
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dev_info(&intf->dev, "V4L2 device registered as %s\n",
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video_device_node_name(&radio->vdev));
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return 0;
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}
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dev_err(&intf->dev, "could not register video device\n");
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v4l2_device_unregister(&radio->v4l2_dev);
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return retval;
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}
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/* USB subsystem interface */
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static struct usb_driver usb_raremono_driver = {
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.name = "radio-raremono",
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.probe = usb_raremono_probe,
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.disconnect = usb_raremono_disconnect,
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.id_table = usb_raremono_device_table,
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};
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module_usb_driver(usb_raremono_driver);
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