Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * Copyright 2013 Cisco Systems, Inc. and/or its affiliates. All rights reserved.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #include <linux/input.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include <linux/usb.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include <linux/hid.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #include <linux/mutex.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include <linux/videodev2.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #include <asm/unaligned.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #include <media/v4l2-device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) #include <media/v4l2-ioctl.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) #include <media/v4l2-ctrls.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) #include <media/v4l2-event.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22)  * 'Thanko's Raremono' is a Japanese si4734-based AM/FM/SW USB receiver:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24)  * http://www.raremono.jp/product/484.html/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26)  * The USB protocol has been reversed engineered using wireshark, initially
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27)  * by Dinesh Ram <dinesh.ram@cern.ch> and finished by Hans Verkuil
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28)  * <hverkuil@xs4all.nl>.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30)  * Sadly the firmware used in this product hides lots of goodies since the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31)  * si4734 has more features than are supported by the firmware. Oh well...
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) /* driver and module definitions */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) MODULE_AUTHOR("Hans Verkuil <hverkuil@xs4all.nl>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) MODULE_DESCRIPTION("Thanko's Raremono AM/FM/SW Receiver USB driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) MODULE_LICENSE("GPL v2");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40)  * The Device announces itself as Cygnal Integrated Products, Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42)  * The vendor and product IDs (and in fact all other lsusb information as
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43)  * well) are identical to the si470x Silicon Labs USB FM Radio Reference
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44)  * Design board, even though this card has a si4734 device. Clearly the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45)  * designer of this product never bothered to change the USB IDs.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) /* USB Device ID List */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) static const struct usb_device_id usb_raremono_device_table[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 	{USB_DEVICE_AND_INTERFACE_INFO(0x10c4, 0x818a, USB_CLASS_HID, 0, 0) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 	{ }						/* Terminating entry */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) MODULE_DEVICE_TABLE(usb, usb_raremono_device_table);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) #define BUFFER_LENGTH 64
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) /* Timeout is set to a high value, could probably be reduced. Need more tests */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) #define USB_TIMEOUT 10000
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) /* Frequency limits in KHz */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) #define FM_FREQ_RANGE_LOW	64000
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) #define FM_FREQ_RANGE_HIGH	108000
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) #define AM_FREQ_RANGE_LOW	520
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) #define AM_FREQ_RANGE_HIGH	1710
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) #define SW_FREQ_RANGE_LOW	2300
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) #define SW_FREQ_RANGE_HIGH	26100
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) enum { BAND_FM, BAND_AM, BAND_SW };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) static const struct v4l2_frequency_band bands[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 	/* Band FM */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 	{
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 		.type = V4L2_TUNER_RADIO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 		.index = 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 		.capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 			      V4L2_TUNER_CAP_FREQ_BANDS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 		.rangelow   = FM_FREQ_RANGE_LOW * 16,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 		.rangehigh  = FM_FREQ_RANGE_HIGH * 16,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 		.modulation = V4L2_BAND_MODULATION_FM,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 	/* Band AM */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 	{
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 		.type = V4L2_TUNER_RADIO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 		.index = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 		.capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_FREQ_BANDS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 		.rangelow   = AM_FREQ_RANGE_LOW * 16,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 		.rangehigh  = AM_FREQ_RANGE_HIGH * 16,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 		.modulation = V4L2_BAND_MODULATION_AM,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 	/* Band SW */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 	{
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 		.type = V4L2_TUNER_RADIO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 		.index = 2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 		.capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_FREQ_BANDS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 		.rangelow   = SW_FREQ_RANGE_LOW * 16,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 		.rangehigh  = SW_FREQ_RANGE_HIGH * 16,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 		.modulation = V4L2_BAND_MODULATION_AM,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) struct raremono_device {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 	struct usb_device *usbdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 	struct usb_interface *intf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 	struct video_device vdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 	struct v4l2_device v4l2_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 	struct mutex lock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 	u8 *buffer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 	u32 band;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 	unsigned curfreq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) static inline struct raremono_device *to_raremono_dev(struct v4l2_device *v4l2_dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 	return container_of(v4l2_dev, struct raremono_device, v4l2_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) /* Set frequency. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) static int raremono_cmd_main(struct raremono_device *radio, unsigned band, unsigned freq)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 	unsigned band_offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 	switch (band) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 	case BAND_FM:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 		band_offset = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 		freq /= 10;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 	case BAND_AM:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 		band_offset = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 	default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 		band_offset = 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 	radio->buffer[0] = 0x04 + band_offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 	radio->buffer[1] = freq >> 8;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 	radio->buffer[2] = freq & 0xff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 	ret = usb_control_msg(radio->usbdev, usb_sndctrlpipe(radio->usbdev, 0),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 			HID_REQ_SET_REPORT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 			USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_OUT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 			0x0300 + radio->buffer[0], 2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 			radio->buffer, 3, USB_TIMEOUT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 	if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 		dev_warn(radio->v4l2_dev.dev, "%s failed (%d)\n", __func__, ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 	radio->curfreq = (band == BAND_FM) ? freq * 10 : freq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) /* Handle unplugging the device.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158)  * We call video_unregister_device in any case.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159)  * The last function called in this procedure is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160)  * usb_raremono_device_release.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) static void usb_raremono_disconnect(struct usb_interface *intf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 	struct raremono_device *radio = to_raremono_dev(usb_get_intfdata(intf));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 	dev_info(&intf->dev, "Thanko's Raremono disconnected\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 	mutex_lock(&radio->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 	usb_set_intfdata(intf, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 	video_unregister_device(&radio->vdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 	v4l2_device_disconnect(&radio->v4l2_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 	mutex_unlock(&radio->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 	v4l2_device_put(&radio->v4l2_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177)  * Linux Video interface
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) static int vidioc_querycap(struct file *file, void *priv,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 					struct v4l2_capability *v)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 	struct raremono_device *radio = video_drvdata(file);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 	strscpy(v->driver, "radio-raremono", sizeof(v->driver));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 	strscpy(v->card, "Thanko's Raremono", sizeof(v->card));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 	usb_make_path(radio->usbdev, v->bus_info, sizeof(v->bus_info));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) static int vidioc_enum_freq_bands(struct file *file, void *priv,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 		struct v4l2_frequency_band *band)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 	if (band->tuner != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 	if (band->index >= ARRAY_SIZE(bands))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 	*band = bands[band->index];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) static int vidioc_g_tuner(struct file *file, void *priv,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 		struct v4l2_tuner *v)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 	struct raremono_device *radio = video_drvdata(file);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 	if (v->index > 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 	strscpy(v->name, "AM/FM/SW", sizeof(v->name));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 	v->capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 		V4L2_TUNER_CAP_FREQ_BANDS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 	v->rangelow = AM_FREQ_RANGE_LOW * 16;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 	v->rangehigh = FM_FREQ_RANGE_HIGH * 16;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 	v->rxsubchans = V4L2_TUNER_SUB_STEREO | V4L2_TUNER_SUB_MONO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 	v->audmode = (radio->curfreq < FM_FREQ_RANGE_LOW) ?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 		V4L2_TUNER_MODE_MONO : V4L2_TUNER_MODE_STEREO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 	memset(radio->buffer, 1, BUFFER_LENGTH);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 	ret = usb_control_msg(radio->usbdev, usb_rcvctrlpipe(radio->usbdev, 0),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 			1, 0xa1, 0x030d, 2, radio->buffer, BUFFER_LENGTH, USB_TIMEOUT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 	if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 		dev_warn(radio->v4l2_dev.dev, "%s failed (%d)\n", __func__, ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 	v->signal = ((radio->buffer[1] & 0xf) << 8 | radio->buffer[2]) << 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) static int vidioc_s_tuner(struct file *file, void *priv,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 					const struct v4l2_tuner *v)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 	return v->index ? -EINVAL : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) static int vidioc_s_frequency(struct file *file, void *priv,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 				const struct v4l2_frequency *f)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 	struct raremono_device *radio = video_drvdata(file);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 	u32 freq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 	unsigned band;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 	if (f->tuner != 0 || f->type != V4L2_TUNER_RADIO)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 	if (f->frequency >= (FM_FREQ_RANGE_LOW + SW_FREQ_RANGE_HIGH) * 8)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 		band = BAND_FM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 	else if (f->frequency <= (AM_FREQ_RANGE_HIGH + SW_FREQ_RANGE_LOW) * 8)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 		band = BAND_AM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 	else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 		band = BAND_SW;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 	freq = clamp_t(u32, f->frequency, bands[band].rangelow, bands[band].rangehigh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 	return raremono_cmd_main(radio, band, freq / 16);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) static int vidioc_g_frequency(struct file *file, void *priv,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 				struct v4l2_frequency *f)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 	struct raremono_device *radio = video_drvdata(file);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 	if (f->tuner != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 	f->type = V4L2_TUNER_RADIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 	f->frequency = radio->curfreq * 16;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) static void raremono_device_release(struct v4l2_device *v4l2_dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 	struct raremono_device *radio = to_raremono_dev(v4l2_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 	kfree(radio->buffer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 	kfree(radio);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) /* File system interface */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) static const struct v4l2_file_operations usb_raremono_fops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 	.owner		= THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 	.open           = v4l2_fh_open,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 	.release        = v4l2_fh_release,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 	.unlocked_ioctl	= video_ioctl2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) static const struct v4l2_ioctl_ops usb_raremono_ioctl_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 	.vidioc_querycap = vidioc_querycap,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) 	.vidioc_g_tuner = vidioc_g_tuner,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) 	.vidioc_s_tuner = vidioc_s_tuner,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) 	.vidioc_g_frequency = vidioc_g_frequency,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 	.vidioc_s_frequency = vidioc_s_frequency,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) 	.vidioc_enum_freq_bands = vidioc_enum_freq_bands,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) /* check if the device is present and register with v4l and usb if it is */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) static int usb_raremono_probe(struct usb_interface *intf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) 				const struct usb_device_id *id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) 	struct raremono_device *radio;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) 	int retval = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) 	radio = kzalloc(sizeof(*radio), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) 	if (!radio)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) 	radio->buffer = kmalloc(BUFFER_LENGTH, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) 	if (!radio->buffer) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) 		kfree(radio);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) 	radio->usbdev = interface_to_usbdev(intf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) 	radio->intf = intf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) 	 * This device uses the same USB IDs as the si470x SiLabs reference
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) 	 * design. So do an additional check: attempt to read the device ID
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) 	 * from the si470x: the lower 12 bits are 0x0242 for the si470x. The
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) 	 * Raremono always returns 0x0800 (the meaning of that is unknown, but
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) 	 * at least it works).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) 	 *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) 	 * We use this check to determine which device we are dealing with.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) 	msleep(20);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) 	retval = usb_control_msg(radio->usbdev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) 		usb_rcvctrlpipe(radio->usbdev, 0),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) 		HID_REQ_GET_REPORT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) 		USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) 		1, 2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) 		radio->buffer, 3, 500);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) 	if (retval != 3 ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) 	    (get_unaligned_be16(&radio->buffer[1]) & 0xfff) == 0x0242) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) 		dev_info(&intf->dev, "this is not Thanko's Raremono.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) 		retval = -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) 		goto free_mem;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) 	dev_info(&intf->dev, "Thanko's Raremono connected: (%04X:%04X)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) 			id->idVendor, id->idProduct);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) 	retval = v4l2_device_register(&intf->dev, &radio->v4l2_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) 	if (retval < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) 		dev_err(&intf->dev, "couldn't register v4l2_device\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) 		goto free_mem;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) 	mutex_init(&radio->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) 	strscpy(radio->vdev.name, radio->v4l2_dev.name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) 		sizeof(radio->vdev.name));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) 	radio->vdev.v4l2_dev = &radio->v4l2_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) 	radio->vdev.fops = &usb_raremono_fops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) 	radio->vdev.ioctl_ops = &usb_raremono_ioctl_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) 	radio->vdev.lock = &radio->lock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) 	radio->vdev.release = video_device_release_empty;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) 	radio->vdev.device_caps = V4L2_CAP_TUNER | V4L2_CAP_RADIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) 	radio->v4l2_dev.release = raremono_device_release;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) 	usb_set_intfdata(intf, &radio->v4l2_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) 	video_set_drvdata(&radio->vdev, radio);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) 	raremono_cmd_main(radio, BAND_FM, 95160);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) 	retval = video_register_device(&radio->vdev, VFL_TYPE_RADIO, -1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) 	if (retval == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) 		dev_info(&intf->dev, "V4L2 device registered as %s\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) 				video_device_node_name(&radio->vdev));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) 	dev_err(&intf->dev, "could not register video device\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) 	v4l2_device_unregister(&radio->v4l2_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) free_mem:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) 	kfree(radio->buffer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) 	kfree(radio);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) 	return retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) /* USB subsystem interface */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) static struct usb_driver usb_raremono_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) 	.name			= "radio-raremono",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) 	.probe			= usb_raremono_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) 	.disconnect		= usb_raremono_disconnect,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) 	.id_table		= usb_raremono_device_table,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) module_usb_driver(usb_raremono_driver);