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.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
26 * - add firmware download/update support
30 /* driver definitions */
31 #define DRIVER_AUTHOR "Tobias Lorenz <tobias.lorenz@gmx.net>"
32 #define DRIVER_CARD "Silicon Labs Si470x FM Radio Receiver"
33 #define DRIVER_DESC "USB radio driver for Si470x FM Radio Receivers"
34 #define DRIVER_VERSION "1.0.10"
37 #include <linux/usb.h>
38 #include <linux/hid.h>
39 #include <linux/slab.h>
41 #include "radio-si470x.h"
44 /* USB Device ID List */
45 static struct usb_device_id si470x_usb_driver_id_table
[] = {
46 /* Silicon Labs USB FM Radio Reference Design */
47 { USB_DEVICE_AND_INTERFACE_INFO(0x10c4, 0x818a, USB_CLASS_HID
, 0, 0) },
48 /* ADS/Tech FM Radio Receiver (formerly Instant FM Music) */
49 { USB_DEVICE_AND_INTERFACE_INFO(0x06e1, 0xa155, USB_CLASS_HID
, 0, 0) },
50 /* KWorld USB FM Radio SnapMusic Mobile 700 (FM700) */
51 { USB_DEVICE_AND_INTERFACE_INFO(0x1b80, 0xd700, USB_CLASS_HID
, 0, 0) },
52 /* Sanei Electric, Inc. FM USB Radio (sold as DealExtreme.com PCear) */
53 { USB_DEVICE_AND_INTERFACE_INFO(0x10c5, 0x819a, USB_CLASS_HID
, 0, 0) },
54 /* Axentia ALERT FM USB Receiver */
55 { USB_DEVICE_AND_INTERFACE_INFO(0x12cf, 0x7111, USB_CLASS_HID
, 0, 0) },
56 /* Terminating entry */
59 MODULE_DEVICE_TABLE(usb
, si470x_usb_driver_id_table
);
63 /**************************************************************************
65 **************************************************************************/
68 static int radio_nr
= -1;
69 module_param(radio_nr
, int, 0444);
70 MODULE_PARM_DESC(radio_nr
, "Radio Nr");
73 static unsigned int usb_timeout
= 500;
74 module_param(usb_timeout
, uint
, 0644);
75 MODULE_PARM_DESC(usb_timeout
, "USB timeout (ms): *500*");
77 /* RDS buffer blocks */
78 static unsigned int rds_buf
= 100;
79 module_param(rds_buf
, uint
, 0444);
80 MODULE_PARM_DESC(rds_buf
, "RDS buffer entries: *100*");
82 /* RDS maximum block errors */
83 static unsigned short max_rds_errors
= 1;
84 /* 0 means 0 errors requiring correction */
85 /* 1 means 1-2 errors requiring correction (used by original USBRadio.exe) */
86 /* 2 means 3-5 errors requiring correction */
87 /* 3 means 6+ errors or errors in checkword, correction not possible */
88 module_param(max_rds_errors
, ushort
, 0644);
89 MODULE_PARM_DESC(max_rds_errors
, "RDS maximum block errors: *1*");
93 /**************************************************************************
95 **************************************************************************/
97 /* Reports 1-16 give direct read/write access to the 16 Si470x registers */
98 /* with the (REPORT_ID - 1) corresponding to the register address across USB */
99 /* endpoint 0 using GET_REPORT and SET_REPORT */
100 #define REGISTER_REPORT_SIZE (RADIO_REGISTER_SIZE + 1)
101 #define REGISTER_REPORT(reg) ((reg) + 1)
103 /* Report 17 gives direct read/write access to the entire Si470x register */
104 /* map across endpoint 0 using GET_REPORT and SET_REPORT */
105 #define ENTIRE_REPORT_SIZE (RADIO_REGISTER_NUM * RADIO_REGISTER_SIZE + 1)
106 #define ENTIRE_REPORT 17
108 /* Report 18 is used to send the lowest 6 Si470x registers up the HID */
109 /* interrupt endpoint 1 to Windows every 20 milliseconds for status */
110 #define RDS_REPORT_SIZE (RDS_REGISTER_NUM * RADIO_REGISTER_SIZE + 1)
111 #define RDS_REPORT 18
113 /* Report 19: LED state */
114 #define LED_REPORT_SIZE 3
115 #define LED_REPORT 19
117 /* Report 19: stream */
118 #define STREAM_REPORT_SIZE 3
119 #define STREAM_REPORT 19
121 /* Report 20: scratch */
122 #define SCRATCH_PAGE_SIZE 63
123 #define SCRATCH_REPORT_SIZE (SCRATCH_PAGE_SIZE + 1)
124 #define SCRATCH_REPORT 20
126 /* Reports 19-22: flash upgrade of the C8051F321 */
127 #define WRITE_REPORT_SIZE 4
128 #define WRITE_REPORT 19
129 #define FLASH_REPORT_SIZE 64
130 #define FLASH_REPORT 20
131 #define CRC_REPORT_SIZE 3
132 #define CRC_REPORT 21
133 #define RESPONSE_REPORT_SIZE 2
134 #define RESPONSE_REPORT 22
136 /* Report 23: currently unused, but can accept 60 byte reports on the HID */
137 /* interrupt out endpoint 2 every 1 millisecond */
138 #define UNUSED_REPORT 23
140 #define MAX_REPORT_SIZE 64
144 /**************************************************************************
145 * Software/Hardware Versions from Scratch Page
146 **************************************************************************/
147 #define RADIO_HW_VERSION 1
151 /**************************************************************************
152 * LED State Definitions
153 **************************************************************************/
154 #define LED_COMMAND 0x35
156 #define NO_CHANGE_LED 0x00
157 #define ALL_COLOR_LED 0x01 /* streaming state */
158 #define BLINK_GREEN_LED 0x02 /* connect state */
159 #define BLINK_RED_LED 0x04
160 #define BLINK_ORANGE_LED 0x10 /* disconnect state */
161 #define SOLID_GREEN_LED 0x20 /* tuning/seeking state */
162 #define SOLID_RED_LED 0x40 /* bootload state */
163 #define SOLID_ORANGE_LED 0x80
167 /**************************************************************************
168 * Stream State Definitions
169 **************************************************************************/
170 #define STREAM_COMMAND 0x36
171 #define STREAM_VIDPID 0x00
172 #define STREAM_AUDIO 0xff
176 /**************************************************************************
177 * Bootloader / Flash Commands
178 **************************************************************************/
180 /* unique id sent to bootloader and required to put into a bootload state */
181 #define UNIQUE_BL_ID 0x34
183 /* mask for the flash data */
184 #define FLASH_DATA_MASK 0x55
186 /* bootloader commands */
187 #define GET_SW_VERSION_COMMAND 0x00
188 #define SET_PAGE_COMMAND 0x01
189 #define ERASE_PAGE_COMMAND 0x02
190 #define WRITE_PAGE_COMMAND 0x03
191 #define CRC_ON_PAGE_COMMAND 0x04
192 #define READ_FLASH_BYTE_COMMAND 0x05
193 #define RESET_DEVICE_COMMAND 0x06
194 #define GET_HW_VERSION_COMMAND 0x07
197 /* bootloader command responses */
198 #define COMMAND_OK 0x01
199 #define COMMAND_FAILED 0x02
200 #define COMMAND_PENDING 0x03
204 /**************************************************************************
205 * General Driver Functions - REGISTER_REPORTs
206 **************************************************************************/
209 * si470x_get_report - receive a HID report
211 static int si470x_get_report(struct si470x_device
*radio
, void *buf
, int size
)
213 unsigned char *report
= buf
;
216 retval
= usb_control_msg(radio
->usbdev
,
217 usb_rcvctrlpipe(radio
->usbdev
, 0),
219 USB_TYPE_CLASS
| USB_RECIP_INTERFACE
| USB_DIR_IN
,
221 buf
, size
, usb_timeout
);
224 dev_warn(&radio
->intf
->dev
,
225 "si470x_get_report: usb_control_msg returned %d\n",
232 * si470x_set_report - send a HID report
234 static int si470x_set_report(struct si470x_device
*radio
, void *buf
, int size
)
236 unsigned char *report
= buf
;
239 retval
= usb_control_msg(radio
->usbdev
,
240 usb_sndctrlpipe(radio
->usbdev
, 0),
242 USB_TYPE_CLASS
| USB_RECIP_INTERFACE
| USB_DIR_OUT
,
244 buf
, size
, usb_timeout
);
247 dev_warn(&radio
->intf
->dev
,
248 "si470x_set_report: usb_control_msg returned %d\n",
255 * si470x_get_register - read register
257 int si470x_get_register(struct si470x_device
*radio
, int regnr
)
261 radio
->usb_buf
[0] = REGISTER_REPORT(regnr
);
263 retval
= si470x_get_report(radio
, radio
->usb_buf
, REGISTER_REPORT_SIZE
);
266 radio
->registers
[regnr
] = get_unaligned_be16(&radio
->usb_buf
[1]);
268 return (retval
< 0) ? -EINVAL
: 0;
273 * si470x_set_register - write register
275 int si470x_set_register(struct si470x_device
*radio
, int regnr
)
279 radio
->usb_buf
[0] = REGISTER_REPORT(regnr
);
280 put_unaligned_be16(radio
->registers
[regnr
], &radio
->usb_buf
[1]);
282 retval
= si470x_set_report(radio
, radio
->usb_buf
, REGISTER_REPORT_SIZE
);
284 return (retval
< 0) ? -EINVAL
: 0;
289 /**************************************************************************
290 * General Driver Functions - ENTIRE_REPORT
291 **************************************************************************/
294 * si470x_get_all_registers - read entire registers
296 static int si470x_get_all_registers(struct si470x_device
*radio
)
301 radio
->usb_buf
[0] = ENTIRE_REPORT
;
303 retval
= si470x_get_report(radio
, radio
->usb_buf
, ENTIRE_REPORT_SIZE
);
306 for (regnr
= 0; regnr
< RADIO_REGISTER_NUM
; regnr
++)
307 radio
->registers
[regnr
] = get_unaligned_be16(
308 &radio
->usb_buf
[regnr
* RADIO_REGISTER_SIZE
+ 1]);
310 return (retval
< 0) ? -EINVAL
: 0;
315 /**************************************************************************
316 * General Driver Functions - LED_REPORT
317 **************************************************************************/
320 * si470x_set_led_state - sets the led state
322 static int si470x_set_led_state(struct si470x_device
*radio
,
323 unsigned char led_state
)
327 radio
->usb_buf
[0] = LED_REPORT
;
328 radio
->usb_buf
[1] = LED_COMMAND
;
329 radio
->usb_buf
[2] = led_state
;
331 retval
= si470x_set_report(radio
, radio
->usb_buf
, LED_REPORT_SIZE
);
333 return (retval
< 0) ? -EINVAL
: 0;
338 /**************************************************************************
339 * General Driver Functions - SCRATCH_REPORT
340 **************************************************************************/
343 * si470x_get_scratch_versions - gets the scratch page and version infos
345 static int si470x_get_scratch_page_versions(struct si470x_device
*radio
)
349 radio
->usb_buf
[0] = SCRATCH_REPORT
;
351 retval
= si470x_get_report(radio
, radio
->usb_buf
, SCRATCH_REPORT_SIZE
);
354 dev_warn(&radio
->intf
->dev
, "si470x_get_scratch: si470x_get_report returned %d\n",
357 radio
->software_version
= radio
->usb_buf
[1];
358 radio
->hardware_version
= radio
->usb_buf
[2];
361 return (retval
< 0) ? -EINVAL
: 0;
366 /**************************************************************************
367 * RDS Driver Functions
368 **************************************************************************/
371 * si470x_int_in_callback - rds callback and processing function
373 * TODO: do we need to use mutex locks in some sections?
375 static void si470x_int_in_callback(struct urb
*urb
)
377 struct si470x_device
*radio
= urb
->context
;
380 unsigned char blocknum
;
381 unsigned short bler
; /* rds block errors */
383 unsigned char tmpbuf
[3];
386 if (urb
->status
== -ENOENT
||
387 urb
->status
== -ECONNRESET
||
388 urb
->status
== -ESHUTDOWN
) {
391 dev_warn(&radio
->intf
->dev
,
392 "non-zero urb status (%d)\n", urb
->status
);
393 goto resubmit
; /* Maybe we can recover. */
397 /* Sometimes the device returns len 0 packets */
398 if (urb
->actual_length
!= RDS_REPORT_SIZE
)
401 radio
->registers
[STATUSRSSI
] =
402 get_unaligned_be16(&radio
->int_in_buffer
[1]);
404 if (radio
->registers
[STATUSRSSI
] & STATUSRSSI_STC
)
405 complete(&radio
->completion
);
407 if ((radio
->registers
[SYSCONFIG1
] & SYSCONFIG1_RDS
)) {
408 /* Update RDS registers with URB data */
409 for (regnr
= 1; regnr
< RDS_REGISTER_NUM
; regnr
++)
410 radio
->registers
[STATUSRSSI
+ regnr
] =
411 get_unaligned_be16(&radio
->int_in_buffer
[
412 regnr
* RADIO_REGISTER_SIZE
+ 1]);
414 if ((radio
->registers
[STATUSRSSI
] & STATUSRSSI_RDSR
) == 0) {
415 /* No RDS group ready, better luck next time */
418 if ((radio
->registers
[STATUSRSSI
] & STATUSRSSI_RDSS
) == 0) {
419 /* RDS decoder not synchronized */
422 for (blocknum
= 0; blocknum
< 4; blocknum
++) {
425 bler
= (radio
->registers
[STATUSRSSI
] &
426 STATUSRSSI_BLERA
) >> 9;
427 rds
= radio
->registers
[RDSA
];
430 bler
= (radio
->registers
[READCHAN
] &
431 READCHAN_BLERB
) >> 14;
432 rds
= radio
->registers
[RDSB
];
435 bler
= (radio
->registers
[READCHAN
] &
436 READCHAN_BLERC
) >> 12;
437 rds
= radio
->registers
[RDSC
];
440 bler
= (radio
->registers
[READCHAN
] &
441 READCHAN_BLERD
) >> 10;
442 rds
= radio
->registers
[RDSD
];
446 /* Fill the V4L2 RDS buffer */
447 put_unaligned_le16(rds
, &tmpbuf
);
448 tmpbuf
[2] = blocknum
; /* offset name */
449 tmpbuf
[2] |= blocknum
<< 3; /* received offset */
450 if (bler
> max_rds_errors
)
451 tmpbuf
[2] |= 0x80; /* uncorrectable errors */
453 tmpbuf
[2] |= 0x40; /* corrected error(s) */
455 /* copy RDS block to internal buffer */
456 memcpy(&radio
->buffer
[radio
->wr_index
], &tmpbuf
, 3);
457 radio
->wr_index
+= 3;
459 /* wrap write pointer */
460 if (radio
->wr_index
>= radio
->buf_size
)
463 /* check for overflow */
464 if (radio
->wr_index
== radio
->rd_index
) {
465 /* increment and wrap read pointer */
466 radio
->rd_index
+= 3;
467 if (radio
->rd_index
>= radio
->buf_size
)
471 if (radio
->wr_index
!= radio
->rd_index
)
472 wake_up_interruptible(&radio
->read_queue
);
476 /* Resubmit if we're still running. */
477 if (radio
->int_in_running
&& radio
->usbdev
) {
478 retval
= usb_submit_urb(radio
->int_in_urb
, GFP_ATOMIC
);
480 dev_warn(&radio
->intf
->dev
,
481 "resubmitting urb failed (%d)", retval
);
482 radio
->int_in_running
= 0;
485 radio
->status_rssi_auto_update
= radio
->int_in_running
;
489 int si470x_fops_open(struct file
*file
)
491 return v4l2_fh_open(file
);
494 int si470x_fops_release(struct file
*file
)
496 return v4l2_fh_release(file
);
499 static void si470x_usb_release(struct v4l2_device
*v4l2_dev
)
501 struct si470x_device
*radio
=
502 container_of(v4l2_dev
, struct si470x_device
, v4l2_dev
);
504 usb_free_urb(radio
->int_in_urb
);
505 v4l2_ctrl_handler_free(&radio
->hdl
);
506 v4l2_device_unregister(&radio
->v4l2_dev
);
507 kfree(radio
->int_in_buffer
);
508 kfree(radio
->buffer
);
509 kfree(radio
->usb_buf
);
514 /**************************************************************************
515 * Video4Linux Interface
516 **************************************************************************/
519 * si470x_vidioc_querycap - query device capabilities
521 int si470x_vidioc_querycap(struct file
*file
, void *priv
,
522 struct v4l2_capability
*capability
)
524 struct si470x_device
*radio
= video_drvdata(file
);
526 strlcpy(capability
->driver
, DRIVER_NAME
, sizeof(capability
->driver
));
527 strlcpy(capability
->card
, DRIVER_CARD
, sizeof(capability
->card
));
528 usb_make_path(radio
->usbdev
, capability
->bus_info
,
529 sizeof(capability
->bus_info
));
530 capability
->device_caps
= V4L2_CAP_HW_FREQ_SEEK
| V4L2_CAP_READWRITE
|
531 V4L2_CAP_TUNER
| V4L2_CAP_RADIO
| V4L2_CAP_RDS_CAPTURE
;
532 capability
->capabilities
= capability
->device_caps
| V4L2_CAP_DEVICE_CAPS
;
537 static int si470x_start_usb(struct si470x_device
*radio
)
541 /* initialize interrupt urb */
542 usb_fill_int_urb(radio
->int_in_urb
, radio
->usbdev
,
543 usb_rcvintpipe(radio
->usbdev
,
544 radio
->int_in_endpoint
->bEndpointAddress
),
545 radio
->int_in_buffer
,
546 le16_to_cpu(radio
->int_in_endpoint
->wMaxPacketSize
),
547 si470x_int_in_callback
,
549 radio
->int_in_endpoint
->bInterval
);
551 radio
->int_in_running
= 1;
554 retval
= usb_submit_urb(radio
->int_in_urb
, GFP_KERNEL
);
556 dev_info(&radio
->intf
->dev
,
557 "submitting int urb failed (%d)\n", retval
);
558 radio
->int_in_running
= 0;
560 radio
->status_rssi_auto_update
= radio
->int_in_running
;
563 retval
= si470x_start(radio
);
567 v4l2_ctrl_handler_setup(&radio
->hdl
);
572 /**************************************************************************
574 **************************************************************************/
577 * si470x_usb_driver_probe - probe for the device
579 static int si470x_usb_driver_probe(struct usb_interface
*intf
,
580 const struct usb_device_id
*id
)
582 struct si470x_device
*radio
;
583 struct usb_host_interface
*iface_desc
;
584 struct usb_endpoint_descriptor
*endpoint
;
585 int i
, int_end_size
, retval
= 0;
586 unsigned char version_warning
= 0;
588 /* private data allocation and initialization */
589 radio
= kzalloc(sizeof(struct si470x_device
), GFP_KERNEL
);
594 radio
->usb_buf
= kmalloc(MAX_REPORT_SIZE
, GFP_KERNEL
);
595 if (radio
->usb_buf
== NULL
) {
599 radio
->usbdev
= interface_to_usbdev(intf
);
601 radio
->band
= 1; /* Default to 76 - 108 MHz */
602 mutex_init(&radio
->lock
);
603 init_completion(&radio
->completion
);
605 iface_desc
= intf
->cur_altsetting
;
607 /* Set up interrupt endpoint information. */
608 for (i
= 0; i
< iface_desc
->desc
.bNumEndpoints
; ++i
) {
609 endpoint
= &iface_desc
->endpoint
[i
].desc
;
610 if (usb_endpoint_is_int_in(endpoint
))
611 radio
->int_in_endpoint
= endpoint
;
613 if (!radio
->int_in_endpoint
) {
614 dev_info(&intf
->dev
, "could not find interrupt in endpoint\n");
619 int_end_size
= le16_to_cpu(radio
->int_in_endpoint
->wMaxPacketSize
);
621 radio
->int_in_buffer
= kmalloc(int_end_size
, GFP_KERNEL
);
622 if (!radio
->int_in_buffer
) {
623 dev_info(&intf
->dev
, "could not allocate int_in_buffer");
628 radio
->int_in_urb
= usb_alloc_urb(0, GFP_KERNEL
);
629 if (!radio
->int_in_urb
) {
634 radio
->v4l2_dev
.release
= si470x_usb_release
;
637 * The si470x SiLabs reference design uses the same USB IDs as
638 * 'Thanko's Raremono' si4734 based receiver. So check here which we
639 * have: attempt to read the device ID from the si470x: the lower 12
640 * bits should be 0x0242 for the si470x.
642 * We use this check to determine which device we are dealing with.
644 if (id
->idVendor
== 0x10c4 && id
->idProduct
== 0x818a) {
645 retval
= usb_control_msg(radio
->usbdev
,
646 usb_rcvctrlpipe(radio
->usbdev
, 0),
648 USB_TYPE_CLASS
| USB_RECIP_INTERFACE
| USB_DIR_IN
,
650 radio
->usb_buf
, 3, 500);
652 (get_unaligned_be16(&radio
->usb_buf
[1]) & 0xfff) != 0x0242) {
653 dev_info(&intf
->dev
, "this is not a si470x device.\n");
659 retval
= v4l2_device_register(&intf
->dev
, &radio
->v4l2_dev
);
661 dev_err(&intf
->dev
, "couldn't register v4l2_device\n");
665 v4l2_ctrl_handler_init(&radio
->hdl
, 2);
666 v4l2_ctrl_new_std(&radio
->hdl
, &si470x_ctrl_ops
,
667 V4L2_CID_AUDIO_MUTE
, 0, 1, 1, 1);
668 v4l2_ctrl_new_std(&radio
->hdl
, &si470x_ctrl_ops
,
669 V4L2_CID_AUDIO_VOLUME
, 0, 15, 1, 15);
670 if (radio
->hdl
.error
) {
671 retval
= radio
->hdl
.error
;
672 dev_err(&intf
->dev
, "couldn't register control\n");
675 radio
->videodev
= si470x_viddev_template
;
676 radio
->videodev
.ctrl_handler
= &radio
->hdl
;
677 radio
->videodev
.lock
= &radio
->lock
;
678 radio
->videodev
.v4l2_dev
= &radio
->v4l2_dev
;
679 radio
->videodev
.release
= video_device_release_empty
;
680 video_set_drvdata(&radio
->videodev
, radio
);
682 /* get device and chip versions */
683 if (si470x_get_all_registers(radio
) < 0) {
687 dev_info(&intf
->dev
, "DeviceID=0x%4.4hx ChipID=0x%4.4hx\n",
688 radio
->registers
[DEVICEID
], radio
->registers
[SI_CHIPID
]);
689 if ((radio
->registers
[SI_CHIPID
] & SI_CHIPID_FIRMWARE
) < RADIO_FW_VERSION
) {
691 "This driver is known to work with firmware version %hu,\n",
694 "but the device has firmware version %hu.\n",
695 radio
->registers
[SI_CHIPID
] & SI_CHIPID_FIRMWARE
);
699 /* get software and hardware versions */
700 if (si470x_get_scratch_page_versions(radio
) < 0) {
704 dev_info(&intf
->dev
, "software version %d, hardware version %d\n",
705 radio
->software_version
, radio
->hardware_version
);
706 if (radio
->hardware_version
< RADIO_HW_VERSION
) {
708 "This driver is known to work with hardware version %hu,\n",
711 "but the device has hardware version %hu.\n",
712 radio
->hardware_version
);
716 /* give out version warning */
717 if (version_warning
== 1) {
719 "If you have some trouble using this driver,\n");
721 "please report to V4L ML at linux-media@vger.kernel.org\n");
724 /* set led to connect state */
725 si470x_set_led_state(radio
, BLINK_GREEN_LED
);
727 /* rds buffer allocation */
728 radio
->buf_size
= rds_buf
* 3;
729 radio
->buffer
= kmalloc(radio
->buf_size
, GFP_KERNEL
);
730 if (!radio
->buffer
) {
735 /* rds buffer configuration */
738 init_waitqueue_head(&radio
->read_queue
);
739 usb_set_intfdata(intf
, radio
);
742 retval
= si470x_start_usb(radio
);
746 /* set initial frequency */
747 si470x_set_freq(radio
, 87.5 * FREQ_MUL
); /* available in all regions */
749 /* register video device */
750 retval
= video_register_device(&radio
->videodev
, VFL_TYPE_RADIO
,
753 dev_err(&intf
->dev
, "Could not register video device\n");
759 kfree(radio
->buffer
);
761 v4l2_ctrl_handler_free(&radio
->hdl
);
763 v4l2_device_unregister(&radio
->v4l2_dev
);
765 usb_free_urb(radio
->int_in_urb
);
767 kfree(radio
->int_in_buffer
);
769 kfree(radio
->usb_buf
);
778 * si470x_usb_driver_suspend - suspend the device
780 static int si470x_usb_driver_suspend(struct usb_interface
*intf
,
781 pm_message_t message
)
783 struct si470x_device
*radio
= usb_get_intfdata(intf
);
785 dev_info(&intf
->dev
, "suspending now...\n");
787 /* shutdown interrupt handler */
788 if (radio
->int_in_running
) {
789 radio
->int_in_running
= 0;
790 if (radio
->int_in_urb
)
791 usb_kill_urb(radio
->int_in_urb
);
794 /* cancel read processes */
795 wake_up_interruptible(&radio
->read_queue
);
804 * si470x_usb_driver_resume - resume the device
806 static int si470x_usb_driver_resume(struct usb_interface
*intf
)
808 struct si470x_device
*radio
= usb_get_intfdata(intf
);
811 dev_info(&intf
->dev
, "resuming now...\n");
814 ret
= si470x_start_usb(radio
);
816 v4l2_ctrl_handler_setup(&radio
->hdl
);
823 * si470x_usb_driver_disconnect - disconnect the device
825 static void si470x_usb_driver_disconnect(struct usb_interface
*intf
)
827 struct si470x_device
*radio
= usb_get_intfdata(intf
);
829 mutex_lock(&radio
->lock
);
830 v4l2_device_disconnect(&radio
->v4l2_dev
);
831 video_unregister_device(&radio
->videodev
);
832 usb_set_intfdata(intf
, NULL
);
833 mutex_unlock(&radio
->lock
);
834 v4l2_device_put(&radio
->v4l2_dev
);
839 * si470x_usb_driver - usb driver interface
841 * A note on suspend/resume: this driver had only empty suspend/resume
842 * functions, and when I tried to test suspend/resume it always disconnected
843 * instead of resuming (using my ADS InstantFM stick). So I've decided to
844 * remove these callbacks until someone else with better hardware can
845 * implement and test this.
847 static struct usb_driver si470x_usb_driver
= {
849 .probe
= si470x_usb_driver_probe
,
850 .disconnect
= si470x_usb_driver_disconnect
,
851 .suspend
= si470x_usb_driver_suspend
,
852 .resume
= si470x_usb_driver_resume
,
853 .reset_resume
= si470x_usb_driver_resume
,
854 .id_table
= si470x_usb_driver_id_table
,
857 module_usb_driver(si470x_usb_driver
);
859 MODULE_LICENSE("GPL");
860 MODULE_AUTHOR(DRIVER_AUTHOR
);
861 MODULE_DESCRIPTION(DRIVER_DESC
);
862 MODULE_VERSION(DRIVER_VERSION
);