2 * drivers/media/radio/si470x/radio-si470x-usb.c
4 * USB driver for radios with Silicon Labs Si470x FM Radio Receivers
6 * Copyright (c) 2009 Tobias Lorenz <tobias.lorenz@gmx.net>
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
22 * - add firmware download/update support
26 /* driver definitions */
27 #define DRIVER_AUTHOR "Tobias Lorenz <tobias.lorenz@gmx.net>"
28 #define DRIVER_CARD "Silicon Labs Si470x FM Radio"
29 #define DRIVER_DESC "USB radio driver for Si470x FM Radio Receivers"
30 #define DRIVER_VERSION "1.0.10"
33 #include <linux/usb.h>
34 #include <linux/hid.h>
35 #include <linux/slab.h>
37 #include "radio-si470x.h"
40 /* USB Device ID List */
41 static const struct usb_device_id si470x_usb_driver_id_table[] = {
42 /* Silicon Labs USB FM Radio Reference Design */
43 { USB_DEVICE_AND_INTERFACE_INFO(0x10c4, 0x818a, USB_CLASS_HID, 0, 0) },
44 /* ADS/Tech FM Radio Receiver (formerly Instant FM Music) */
45 { USB_DEVICE_AND_INTERFACE_INFO(0x06e1, 0xa155, USB_CLASS_HID, 0, 0) },
46 /* KWorld USB FM Radio SnapMusic Mobile 700 (FM700) */
47 { USB_DEVICE_AND_INTERFACE_INFO(0x1b80, 0xd700, USB_CLASS_HID, 0, 0) },
48 /* Sanei Electric, Inc. FM USB Radio (sold as DealExtreme.com PCear) */
49 { USB_DEVICE_AND_INTERFACE_INFO(0x10c5, 0x819a, USB_CLASS_HID, 0, 0) },
50 /* Axentia ALERT FM USB Receiver */
51 { USB_DEVICE_AND_INTERFACE_INFO(0x12cf, 0x7111, USB_CLASS_HID, 0, 0) },
52 /* Terminating entry */
55 MODULE_DEVICE_TABLE(usb, si470x_usb_driver_id_table);
59 /**************************************************************************
61 **************************************************************************/
64 static int radio_nr = -1;
65 module_param(radio_nr, int, 0444);
66 MODULE_PARM_DESC(radio_nr, "Radio Nr");
69 static unsigned int usb_timeout = 500;
70 module_param(usb_timeout, uint, 0644);
71 MODULE_PARM_DESC(usb_timeout, "USB timeout (ms): *500*");
73 /* RDS buffer blocks */
74 static unsigned int rds_buf = 100;
75 module_param(rds_buf, uint, 0444);
76 MODULE_PARM_DESC(rds_buf, "RDS buffer entries: *100*");
78 /* RDS maximum block errors */
79 static unsigned short max_rds_errors = 1;
80 /* 0 means 0 errors requiring correction */
81 /* 1 means 1-2 errors requiring correction (used by original USBRadio.exe) */
82 /* 2 means 3-5 errors requiring correction */
83 /* 3 means 6+ errors or errors in checkword, correction not possible */
84 module_param(max_rds_errors, ushort, 0644);
85 MODULE_PARM_DESC(max_rds_errors, "RDS maximum block errors: *1*");
89 /**************************************************************************
91 **************************************************************************/
93 /* Reports 1-16 give direct read/write access to the 16 Si470x registers */
94 /* with the (REPORT_ID - 1) corresponding to the register address across USB */
95 /* endpoint 0 using GET_REPORT and SET_REPORT */
96 #define REGISTER_REPORT_SIZE (RADIO_REGISTER_SIZE + 1)
97 #define REGISTER_REPORT(reg) ((reg) + 1)
99 /* Report 17 gives direct read/write access to the entire Si470x register */
100 /* map across endpoint 0 using GET_REPORT and SET_REPORT */
101 #define ENTIRE_REPORT_SIZE (RADIO_REGISTER_NUM * RADIO_REGISTER_SIZE + 1)
102 #define ENTIRE_REPORT 17
104 /* Report 18 is used to send the lowest 6 Si470x registers up the HID */
105 /* interrupt endpoint 1 to Windows every 20 milliseconds for status */
106 #define RDS_REPORT_SIZE (RDS_REGISTER_NUM * RADIO_REGISTER_SIZE + 1)
107 #define RDS_REPORT 18
109 /* Report 19: LED state */
110 #define LED_REPORT_SIZE 3
111 #define LED_REPORT 19
113 /* Report 19: stream */
114 #define STREAM_REPORT_SIZE 3
115 #define STREAM_REPORT 19
117 /* Report 20: scratch */
118 #define SCRATCH_PAGE_SIZE 63
119 #define SCRATCH_REPORT_SIZE (SCRATCH_PAGE_SIZE + 1)
120 #define SCRATCH_REPORT 20
122 /* Reports 19-22: flash upgrade of the C8051F321 */
123 #define WRITE_REPORT_SIZE 4
124 #define WRITE_REPORT 19
125 #define FLASH_REPORT_SIZE 64
126 #define FLASH_REPORT 20
127 #define CRC_REPORT_SIZE 3
128 #define CRC_REPORT 21
129 #define RESPONSE_REPORT_SIZE 2
130 #define RESPONSE_REPORT 22
132 /* Report 23: currently unused, but can accept 60 byte reports on the HID */
133 /* interrupt out endpoint 2 every 1 millisecond */
134 #define UNUSED_REPORT 23
136 #define MAX_REPORT_SIZE 64
140 /**************************************************************************
141 * Software/Hardware Versions from Scratch Page
142 **************************************************************************/
143 #define RADIO_HW_VERSION 1
147 /**************************************************************************
148 * LED State Definitions
149 **************************************************************************/
150 #define LED_COMMAND 0x35
152 #define NO_CHANGE_LED 0x00
153 #define ALL_COLOR_LED 0x01 /* streaming state */
154 #define BLINK_GREEN_LED 0x02 /* connect state */
155 #define BLINK_RED_LED 0x04
156 #define BLINK_ORANGE_LED 0x10 /* disconnect state */
157 #define SOLID_GREEN_LED 0x20 /* tuning/seeking state */
158 #define SOLID_RED_LED 0x40 /* bootload state */
159 #define SOLID_ORANGE_LED 0x80
163 /**************************************************************************
164 * Stream State Definitions
165 **************************************************************************/
166 #define STREAM_COMMAND 0x36
167 #define STREAM_VIDPID 0x00
168 #define STREAM_AUDIO 0xff
172 /**************************************************************************
173 * Bootloader / Flash Commands
174 **************************************************************************/
176 /* unique id sent to bootloader and required to put into a bootload state */
177 #define UNIQUE_BL_ID 0x34
179 /* mask for the flash data */
180 #define FLASH_DATA_MASK 0x55
182 /* bootloader commands */
183 #define GET_SW_VERSION_COMMAND 0x00
184 #define SET_PAGE_COMMAND 0x01
185 #define ERASE_PAGE_COMMAND 0x02
186 #define WRITE_PAGE_COMMAND 0x03
187 #define CRC_ON_PAGE_COMMAND 0x04
188 #define READ_FLASH_BYTE_COMMAND 0x05
189 #define RESET_DEVICE_COMMAND 0x06
190 #define GET_HW_VERSION_COMMAND 0x07
193 /* bootloader command responses */
194 #define COMMAND_OK 0x01
195 #define COMMAND_FAILED 0x02
196 #define COMMAND_PENDING 0x03
200 /**************************************************************************
201 * General Driver Functions - REGISTER_REPORTs
202 **************************************************************************/
205 * si470x_get_report - receive a HID report
207 static int si470x_get_report(struct si470x_device *radio, void *buf, int size)
209 unsigned char *report = buf;
212 retval = usb_control_msg(radio->usbdev,
213 usb_rcvctrlpipe(radio->usbdev, 0),
215 USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,
217 buf, size, usb_timeout);
220 dev_warn(&radio->intf->dev,
221 "si470x_get_report: usb_control_msg returned %d\n",
228 * si470x_set_report - send a HID report
230 static int si470x_set_report(struct si470x_device *radio, void *buf, int size)
232 unsigned char *report = buf;
235 retval = usb_control_msg(radio->usbdev,
236 usb_sndctrlpipe(radio->usbdev, 0),
238 USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_OUT,
240 buf, size, usb_timeout);
243 dev_warn(&radio->intf->dev,
244 "si470x_set_report: usb_control_msg returned %d\n",
251 * si470x_get_register - read register
253 static int si470x_get_register(struct si470x_device *radio, int regnr)
257 radio->usb_buf[0] = REGISTER_REPORT(regnr);
259 retval = si470x_get_report(radio, radio->usb_buf, REGISTER_REPORT_SIZE);
262 radio->registers[regnr] = get_unaligned_be16(&radio->usb_buf[1]);
264 return (retval < 0) ? -EINVAL : 0;
269 * si470x_set_register - write register
271 static int si470x_set_register(struct si470x_device *radio, int regnr)
275 radio->usb_buf[0] = REGISTER_REPORT(regnr);
276 put_unaligned_be16(radio->registers[regnr], &radio->usb_buf[1]);
278 retval = si470x_set_report(radio, radio->usb_buf, REGISTER_REPORT_SIZE);
280 return (retval < 0) ? -EINVAL : 0;
285 /**************************************************************************
286 * General Driver Functions - ENTIRE_REPORT
287 **************************************************************************/
290 * si470x_get_all_registers - read entire registers
292 static int si470x_get_all_registers(struct si470x_device *radio)
297 radio->usb_buf[0] = ENTIRE_REPORT;
299 retval = si470x_get_report(radio, radio->usb_buf, ENTIRE_REPORT_SIZE);
302 for (regnr = 0; regnr < RADIO_REGISTER_NUM; regnr++)
303 radio->registers[regnr] = get_unaligned_be16(
304 &radio->usb_buf[regnr * RADIO_REGISTER_SIZE + 1]);
306 return (retval < 0) ? -EINVAL : 0;
311 /**************************************************************************
312 * General Driver Functions - LED_REPORT
313 **************************************************************************/
316 * si470x_set_led_state - sets the led state
318 static int si470x_set_led_state(struct si470x_device *radio,
319 unsigned char led_state)
323 radio->usb_buf[0] = LED_REPORT;
324 radio->usb_buf[1] = LED_COMMAND;
325 radio->usb_buf[2] = led_state;
327 retval = si470x_set_report(radio, radio->usb_buf, LED_REPORT_SIZE);
329 return (retval < 0) ? -EINVAL : 0;
334 /**************************************************************************
335 * General Driver Functions - SCRATCH_REPORT
336 **************************************************************************/
339 * si470x_get_scratch_versions - gets the scratch page and version infos
341 static int si470x_get_scratch_page_versions(struct si470x_device *radio)
345 radio->usb_buf[0] = SCRATCH_REPORT;
347 retval = si470x_get_report(radio, radio->usb_buf, SCRATCH_REPORT_SIZE);
350 dev_warn(&radio->intf->dev, "si470x_get_scratch: si470x_get_report returned %d\n",
353 radio->software_version = radio->usb_buf[1];
354 radio->hardware_version = radio->usb_buf[2];
357 return (retval < 0) ? -EINVAL : 0;
362 /**************************************************************************
363 * RDS Driver Functions
364 **************************************************************************/
367 * si470x_int_in_callback - rds callback and processing function
369 * TODO: do we need to use mutex locks in some sections?
371 static void si470x_int_in_callback(struct urb *urb)
373 struct si470x_device *radio = urb->context;
376 unsigned char blocknum;
377 unsigned short bler; /* rds block errors */
379 unsigned char tmpbuf[3];
382 if (urb->status == -ENOENT ||
383 urb->status == -ECONNRESET ||
384 urb->status == -ESHUTDOWN) {
387 dev_warn(&radio->intf->dev,
388 "non-zero urb status (%d)\n", urb->status);
389 goto resubmit; /* Maybe we can recover. */
393 /* Sometimes the device returns len 0 packets */
394 if (urb->actual_length != RDS_REPORT_SIZE)
397 radio->registers[STATUSRSSI] =
398 get_unaligned_be16(&radio->int_in_buffer[1]);
400 if (radio->registers[STATUSRSSI] & STATUSRSSI_STC)
401 complete(&radio->completion);
403 if ((radio->registers[SYSCONFIG1] & SYSCONFIG1_RDS)) {
404 /* Update RDS registers with URB data */
405 for (regnr = 1; regnr < RDS_REGISTER_NUM; regnr++)
406 radio->registers[STATUSRSSI + regnr] =
407 get_unaligned_be16(&radio->int_in_buffer[
408 regnr * RADIO_REGISTER_SIZE + 1]);
410 if ((radio->registers[STATUSRSSI] & STATUSRSSI_RDSR) == 0) {
411 /* No RDS group ready, better luck next time */
414 if ((radio->registers[STATUSRSSI] & STATUSRSSI_RDSS) == 0) {
415 /* RDS decoder not synchronized */
418 for (blocknum = 0; blocknum < 4; blocknum++) {
421 bler = (radio->registers[STATUSRSSI] &
422 STATUSRSSI_BLERA) >> 9;
423 rds = radio->registers[RDSA];
426 bler = (radio->registers[READCHAN] &
427 READCHAN_BLERB) >> 14;
428 rds = radio->registers[RDSB];
431 bler = (radio->registers[READCHAN] &
432 READCHAN_BLERC) >> 12;
433 rds = radio->registers[RDSC];
436 bler = (radio->registers[READCHAN] &
437 READCHAN_BLERD) >> 10;
438 rds = radio->registers[RDSD];
442 /* Fill the V4L2 RDS buffer */
443 put_unaligned_le16(rds, &tmpbuf);
444 tmpbuf[2] = blocknum; /* offset name */
445 tmpbuf[2] |= blocknum << 3; /* received offset */
446 if (bler > max_rds_errors)
447 tmpbuf[2] |= 0x80; /* uncorrectable errors */
449 tmpbuf[2] |= 0x40; /* corrected error(s) */
451 /* copy RDS block to internal buffer */
452 memcpy(&radio->buffer[radio->wr_index], &tmpbuf, 3);
453 radio->wr_index += 3;
455 /* wrap write pointer */
456 if (radio->wr_index >= radio->buf_size)
459 /* check for overflow */
460 if (radio->wr_index == radio->rd_index) {
461 /* increment and wrap read pointer */
462 radio->rd_index += 3;
463 if (radio->rd_index >= radio->buf_size)
467 if (radio->wr_index != radio->rd_index)
468 wake_up_interruptible(&radio->read_queue);
472 /* Resubmit if we're still running. */
473 if (radio->int_in_running && radio->usbdev) {
474 retval = usb_submit_urb(radio->int_in_urb, GFP_ATOMIC);
476 dev_warn(&radio->intf->dev,
477 "resubmitting urb failed (%d)", retval);
478 radio->int_in_running = 0;
481 radio->status_rssi_auto_update = radio->int_in_running;
485 static int si470x_fops_open(struct file *file)
487 return v4l2_fh_open(file);
490 static int si470x_fops_release(struct file *file)
492 return v4l2_fh_release(file);
495 static void si470x_usb_release(struct v4l2_device *v4l2_dev)
497 struct si470x_device *radio =
498 container_of(v4l2_dev, struct si470x_device, v4l2_dev);
500 usb_free_urb(radio->int_in_urb);
501 v4l2_ctrl_handler_free(&radio->hdl);
502 v4l2_device_unregister(&radio->v4l2_dev);
503 kfree(radio->int_in_buffer);
504 kfree(radio->buffer);
505 kfree(radio->usb_buf);
510 /**************************************************************************
511 * Video4Linux Interface
512 **************************************************************************/
515 * si470x_vidioc_querycap - query device capabilities
517 static int si470x_vidioc_querycap(struct file *file, void *priv,
518 struct v4l2_capability *capability)
520 struct si470x_device *radio = video_drvdata(file);
522 strlcpy(capability->driver, DRIVER_NAME, sizeof(capability->driver));
523 strlcpy(capability->card, DRIVER_CARD, sizeof(capability->card));
524 usb_make_path(radio->usbdev, capability->bus_info,
525 sizeof(capability->bus_info));
526 capability->device_caps = V4L2_CAP_HW_FREQ_SEEK | V4L2_CAP_READWRITE |
527 V4L2_CAP_TUNER | V4L2_CAP_RADIO | V4L2_CAP_RDS_CAPTURE;
528 capability->capabilities = capability->device_caps | V4L2_CAP_DEVICE_CAPS;
533 static int si470x_start_usb(struct si470x_device *radio)
537 /* initialize interrupt urb */
538 usb_fill_int_urb(radio->int_in_urb, radio->usbdev,
539 usb_rcvintpipe(radio->usbdev,
540 radio->int_in_endpoint->bEndpointAddress),
541 radio->int_in_buffer,
542 le16_to_cpu(radio->int_in_endpoint->wMaxPacketSize),
543 si470x_int_in_callback,
545 radio->int_in_endpoint->bInterval);
547 radio->int_in_running = 1;
550 retval = usb_submit_urb(radio->int_in_urb, GFP_KERNEL);
552 dev_info(&radio->intf->dev,
553 "submitting int urb failed (%d)\n", retval);
554 radio->int_in_running = 0;
556 radio->status_rssi_auto_update = radio->int_in_running;
559 retval = si470x_start(radio);
563 v4l2_ctrl_handler_setup(&radio->hdl);
568 /**************************************************************************
570 **************************************************************************/
573 * si470x_usb_driver_probe - probe for the device
575 static int si470x_usb_driver_probe(struct usb_interface *intf,
576 const struct usb_device_id *id)
578 struct si470x_device *radio;
579 struct usb_host_interface *iface_desc;
580 struct usb_endpoint_descriptor *endpoint;
581 int i, int_end_size, retval;
582 unsigned char version_warning = 0;
584 /* private data allocation and initialization */
585 radio = kzalloc(sizeof(struct si470x_device), GFP_KERNEL);
590 radio->usb_buf = kmalloc(MAX_REPORT_SIZE, GFP_KERNEL);
591 if (radio->usb_buf == NULL) {
595 radio->usbdev = interface_to_usbdev(intf);
597 radio->band = 1; /* Default to 76 - 108 MHz */
598 mutex_init(&radio->lock);
599 init_completion(&radio->completion);
601 radio->get_register = si470x_get_register;
602 radio->set_register = si470x_set_register;
603 radio->fops_open = si470x_fops_open;
604 radio->fops_release = si470x_fops_release;
605 radio->vidioc_querycap = si470x_vidioc_querycap;
607 iface_desc = intf->cur_altsetting;
609 /* Set up interrupt endpoint information. */
610 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
611 endpoint = &iface_desc->endpoint[i].desc;
612 if (usb_endpoint_is_int_in(endpoint))
613 radio->int_in_endpoint = endpoint;
615 if (!radio->int_in_endpoint) {
616 dev_info(&intf->dev, "could not find interrupt in endpoint\n");
621 int_end_size = le16_to_cpu(radio->int_in_endpoint->wMaxPacketSize);
623 radio->int_in_buffer = kmalloc(int_end_size, GFP_KERNEL);
624 if (!radio->int_in_buffer) {
625 dev_info(&intf->dev, "could not allocate int_in_buffer");
630 radio->int_in_urb = usb_alloc_urb(0, GFP_KERNEL);
631 if (!radio->int_in_urb) {
636 radio->v4l2_dev.release = si470x_usb_release;
639 * The si470x SiLabs reference design uses the same USB IDs as
640 * 'Thanko's Raremono' si4734 based receiver. So check here which we
641 * have: attempt to read the device ID from the si470x: the lower 12
642 * bits should be 0x0242 for the si470x.
644 * We use this check to determine which device we are dealing with.
646 if (id->idVendor == 0x10c4 && id->idProduct == 0x818a) {
647 retval = usb_control_msg(radio->usbdev,
648 usb_rcvctrlpipe(radio->usbdev, 0),
650 USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,
652 radio->usb_buf, 3, 500);
654 (get_unaligned_be16(&radio->usb_buf[1]) & 0xfff) != 0x0242) {
655 dev_info(&intf->dev, "this is not a si470x device.\n");
661 retval = v4l2_device_register(&intf->dev, &radio->v4l2_dev);
663 dev_err(&intf->dev, "couldn't register v4l2_device\n");
667 v4l2_ctrl_handler_init(&radio->hdl, 2);
668 v4l2_ctrl_new_std(&radio->hdl, &si470x_ctrl_ops,
669 V4L2_CID_AUDIO_MUTE, 0, 1, 1, 1);
670 v4l2_ctrl_new_std(&radio->hdl, &si470x_ctrl_ops,
671 V4L2_CID_AUDIO_VOLUME, 0, 15, 1, 15);
672 if (radio->hdl.error) {
673 retval = radio->hdl.error;
674 dev_err(&intf->dev, "couldn't register control\n");
677 radio->videodev = si470x_viddev_template;
678 radio->videodev.ctrl_handler = &radio->hdl;
679 radio->videodev.lock = &radio->lock;
680 radio->videodev.v4l2_dev = &radio->v4l2_dev;
681 radio->videodev.release = video_device_release_empty;
682 video_set_drvdata(&radio->videodev, radio);
684 /* get device and chip versions */
685 if (si470x_get_all_registers(radio) < 0) {
689 dev_info(&intf->dev, "DeviceID=0x%4.4hx ChipID=0x%4.4hx\n",
690 radio->registers[DEVICEID], radio->registers[SI_CHIPID]);
691 if ((radio->registers[SI_CHIPID] & SI_CHIPID_FIRMWARE) < RADIO_FW_VERSION) {
693 "This driver is known to work with firmware version %hu,\n",
696 "but the device has firmware version %hu.\n",
697 radio->registers[SI_CHIPID] & SI_CHIPID_FIRMWARE);
701 /* get software and hardware versions */
702 if (si470x_get_scratch_page_versions(radio) < 0) {
706 dev_info(&intf->dev, "software version %d, hardware version %d\n",
707 radio->software_version, radio->hardware_version);
708 if (radio->hardware_version < RADIO_HW_VERSION) {
710 "This driver is known to work with hardware version %hu,\n",
713 "but the device has hardware version %hu.\n",
714 radio->hardware_version);
718 /* give out version warning */
719 if (version_warning == 1) {
721 "If you have some trouble using this driver,\n");
723 "please report to V4L ML at linux-media@vger.kernel.org\n");
726 /* set led to connect state */
727 si470x_set_led_state(radio, BLINK_GREEN_LED);
729 /* rds buffer allocation */
730 radio->buf_size = rds_buf * 3;
731 radio->buffer = kmalloc(radio->buf_size, GFP_KERNEL);
732 if (!radio->buffer) {
737 /* rds buffer configuration */
740 init_waitqueue_head(&radio->read_queue);
741 usb_set_intfdata(intf, radio);
744 retval = si470x_start_usb(radio);
748 /* set initial frequency */
749 si470x_set_freq(radio, 87.5 * FREQ_MUL); /* available in all regions */
751 /* register video device */
752 retval = video_register_device(&radio->videodev, VFL_TYPE_RADIO,
755 dev_err(&intf->dev, "Could not register video device\n");
761 usb_kill_urb(radio->int_in_urb);
763 kfree(radio->buffer);
765 v4l2_ctrl_handler_free(&radio->hdl);
767 v4l2_device_unregister(&radio->v4l2_dev);
769 usb_free_urb(radio->int_in_urb);
771 kfree(radio->int_in_buffer);
773 kfree(radio->usb_buf);
782 * si470x_usb_driver_suspend - suspend the device
784 static int si470x_usb_driver_suspend(struct usb_interface *intf,
785 pm_message_t message)
787 struct si470x_device *radio = usb_get_intfdata(intf);
789 dev_info(&intf->dev, "suspending now...\n");
791 /* shutdown interrupt handler */
792 if (radio->int_in_running) {
793 radio->int_in_running = 0;
794 if (radio->int_in_urb)
795 usb_kill_urb(radio->int_in_urb);
798 /* cancel read processes */
799 wake_up_interruptible(&radio->read_queue);
808 * si470x_usb_driver_resume - resume the device
810 static int si470x_usb_driver_resume(struct usb_interface *intf)
812 struct si470x_device *radio = usb_get_intfdata(intf);
815 dev_info(&intf->dev, "resuming now...\n");
818 ret = si470x_start_usb(radio);
820 v4l2_ctrl_handler_setup(&radio->hdl);
827 * si470x_usb_driver_disconnect - disconnect the device
829 static void si470x_usb_driver_disconnect(struct usb_interface *intf)
831 struct si470x_device *radio = usb_get_intfdata(intf);
833 mutex_lock(&radio->lock);
834 v4l2_device_disconnect(&radio->v4l2_dev);
835 video_unregister_device(&radio->videodev);
836 usb_kill_urb(radio->int_in_urb);
837 usb_set_intfdata(intf, NULL);
838 mutex_unlock(&radio->lock);
839 v4l2_device_put(&radio->v4l2_dev);
844 * si470x_usb_driver - usb driver interface
846 * A note on suspend/resume: this driver had only empty suspend/resume
847 * functions, and when I tried to test suspend/resume it always disconnected
848 * instead of resuming (using my ADS InstantFM stick). So I've decided to
849 * remove these callbacks until someone else with better hardware can
850 * implement and test this.
852 static struct usb_driver si470x_usb_driver = {
854 .probe = si470x_usb_driver_probe,
855 .disconnect = si470x_usb_driver_disconnect,
856 .suspend = si470x_usb_driver_suspend,
857 .resume = si470x_usb_driver_resume,
858 .reset_resume = si470x_usb_driver_resume,
859 .id_table = si470x_usb_driver_id_table,
862 module_usb_driver(si470x_usb_driver);
864 MODULE_LICENSE("GPL");
865 MODULE_AUTHOR(DRIVER_AUTHOR);
866 MODULE_DESCRIPTION(DRIVER_DESC);
867 MODULE_VERSION(DRIVER_VERSION);