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 /* Terminating entry */
57 MODULE_DEVICE_TABLE(usb
, si470x_usb_driver_id_table
);
61 /**************************************************************************
63 **************************************************************************/
66 static int radio_nr
= -1;
67 module_param(radio_nr
, int, 0444);
68 MODULE_PARM_DESC(radio_nr
, "Radio Nr");
71 static unsigned int usb_timeout
= 500;
72 module_param(usb_timeout
, uint
, 0644);
73 MODULE_PARM_DESC(usb_timeout
, "USB timeout (ms): *500*");
75 /* RDS buffer blocks */
76 static unsigned int rds_buf
= 100;
77 module_param(rds_buf
, uint
, 0444);
78 MODULE_PARM_DESC(rds_buf
, "RDS buffer entries: *100*");
80 /* RDS maximum block errors */
81 static unsigned short max_rds_errors
= 1;
82 /* 0 means 0 errors requiring correction */
83 /* 1 means 1-2 errors requiring correction (used by original USBRadio.exe) */
84 /* 2 means 3-5 errors requiring correction */
85 /* 3 means 6+ errors or errors in checkword, correction not possible */
86 module_param(max_rds_errors
, ushort
, 0644);
87 MODULE_PARM_DESC(max_rds_errors
, "RDS maximum block errors: *1*");
91 /**************************************************************************
93 **************************************************************************/
95 /* Reports 1-16 give direct read/write access to the 16 Si470x registers */
96 /* with the (REPORT_ID - 1) corresponding to the register address across USB */
97 /* endpoint 0 using GET_REPORT and SET_REPORT */
98 #define REGISTER_REPORT_SIZE (RADIO_REGISTER_SIZE + 1)
99 #define REGISTER_REPORT(reg) ((reg) + 1)
101 /* Report 17 gives direct read/write access to the entire Si470x register */
102 /* map across endpoint 0 using GET_REPORT and SET_REPORT */
103 #define ENTIRE_REPORT_SIZE (RADIO_REGISTER_NUM * RADIO_REGISTER_SIZE + 1)
104 #define ENTIRE_REPORT 17
106 /* Report 18 is used to send the lowest 6 Si470x registers up the HID */
107 /* interrupt endpoint 1 to Windows every 20 milliseconds for status */
108 #define RDS_REPORT_SIZE (RDS_REGISTER_NUM * RADIO_REGISTER_SIZE + 1)
109 #define RDS_REPORT 18
111 /* Report 19: LED state */
112 #define LED_REPORT_SIZE 3
113 #define LED_REPORT 19
115 /* Report 19: stream */
116 #define STREAM_REPORT_SIZE 3
117 #define STREAM_REPORT 19
119 /* Report 20: scratch */
120 #define SCRATCH_PAGE_SIZE 63
121 #define SCRATCH_REPORT_SIZE (SCRATCH_PAGE_SIZE + 1)
122 #define SCRATCH_REPORT 20
124 /* Reports 19-22: flash upgrade of the C8051F321 */
125 #define WRITE_REPORT_SIZE 4
126 #define WRITE_REPORT 19
127 #define FLASH_REPORT_SIZE 64
128 #define FLASH_REPORT 20
129 #define CRC_REPORT_SIZE 3
130 #define CRC_REPORT 21
131 #define RESPONSE_REPORT_SIZE 2
132 #define RESPONSE_REPORT 22
134 /* Report 23: currently unused, but can accept 60 byte reports on the HID */
135 /* interrupt out endpoint 2 every 1 millisecond */
136 #define UNUSED_REPORT 23
140 /**************************************************************************
141 * Software/Hardware Versions from Scratch Page
142 **************************************************************************/
143 #define RADIO_SW_VERSION_NOT_BOOTLOADABLE 6
144 #define RADIO_SW_VERSION 7
145 #define RADIO_HW_VERSION 1
149 /**************************************************************************
150 * LED State Definitions
151 **************************************************************************/
152 #define LED_COMMAND 0x35
154 #define NO_CHANGE_LED 0x00
155 #define ALL_COLOR_LED 0x01 /* streaming state */
156 #define BLINK_GREEN_LED 0x02 /* connect state */
157 #define BLINK_RED_LED 0x04
158 #define BLINK_ORANGE_LED 0x10 /* disconnect state */
159 #define SOLID_GREEN_LED 0x20 /* tuning/seeking state */
160 #define SOLID_RED_LED 0x40 /* bootload state */
161 #define SOLID_ORANGE_LED 0x80
165 /**************************************************************************
166 * Stream State Definitions
167 **************************************************************************/
168 #define STREAM_COMMAND 0x36
169 #define STREAM_VIDPID 0x00
170 #define STREAM_AUDIO 0xff
174 /**************************************************************************
175 * Bootloader / Flash Commands
176 **************************************************************************/
178 /* unique id sent to bootloader and required to put into a bootload state */
179 #define UNIQUE_BL_ID 0x34
181 /* mask for the flash data */
182 #define FLASH_DATA_MASK 0x55
184 /* bootloader commands */
185 #define GET_SW_VERSION_COMMAND 0x00
186 #define SET_PAGE_COMMAND 0x01
187 #define ERASE_PAGE_COMMAND 0x02
188 #define WRITE_PAGE_COMMAND 0x03
189 #define CRC_ON_PAGE_COMMAND 0x04
190 #define READ_FLASH_BYTE_COMMAND 0x05
191 #define RESET_DEVICE_COMMAND 0x06
192 #define GET_HW_VERSION_COMMAND 0x07
195 /* bootloader command responses */
196 #define COMMAND_OK 0x01
197 #define COMMAND_FAILED 0x02
198 #define COMMAND_PENDING 0x03
202 /**************************************************************************
203 * General Driver Functions - REGISTER_REPORTs
204 **************************************************************************/
207 * si470x_get_report - receive a HID report
209 static int si470x_get_report(struct si470x_device
*radio
, void *buf
, int size
)
211 unsigned char *report
= (unsigned char *) buf
;
214 retval
= usb_control_msg(radio
->usbdev
,
215 usb_rcvctrlpipe(radio
->usbdev
, 0),
217 USB_TYPE_CLASS
| USB_RECIP_INTERFACE
| USB_DIR_IN
,
219 buf
, size
, usb_timeout
);
222 dev_warn(&radio
->intf
->dev
,
223 "si470x_get_report: usb_control_msg returned %d\n",
230 * si470x_set_report - send a HID report
232 static int si470x_set_report(struct si470x_device
*radio
, void *buf
, int size
)
234 unsigned char *report
= (unsigned char *) buf
;
237 retval
= usb_control_msg(radio
->usbdev
,
238 usb_sndctrlpipe(radio
->usbdev
, 0),
240 USB_TYPE_CLASS
| USB_RECIP_INTERFACE
| USB_DIR_OUT
,
242 buf
, size
, usb_timeout
);
245 dev_warn(&radio
->intf
->dev
,
246 "si470x_set_report: usb_control_msg returned %d\n",
253 * si470x_get_register - read register
255 int si470x_get_register(struct si470x_device
*radio
, int regnr
)
257 unsigned char buf
[REGISTER_REPORT_SIZE
];
260 buf
[0] = REGISTER_REPORT(regnr
);
262 retval
= si470x_get_report(radio
, (void *) &buf
, sizeof(buf
));
265 radio
->registers
[regnr
] = get_unaligned_be16(&buf
[1]);
267 return (retval
< 0) ? -EINVAL
: 0;
272 * si470x_set_register - write register
274 int si470x_set_register(struct si470x_device
*radio
, int regnr
)
276 unsigned char buf
[REGISTER_REPORT_SIZE
];
279 buf
[0] = REGISTER_REPORT(regnr
);
280 put_unaligned_be16(radio
->registers
[regnr
], &buf
[1]);
282 retval
= si470x_set_report(radio
, (void *) &buf
, sizeof(buf
));
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
)
298 unsigned char buf
[ENTIRE_REPORT_SIZE
];
302 buf
[0] = ENTIRE_REPORT
;
304 retval
= si470x_get_report(radio
, (void *) &buf
, sizeof(buf
));
307 for (regnr
= 0; regnr
< RADIO_REGISTER_NUM
; regnr
++)
308 radio
->registers
[regnr
] = get_unaligned_be16(
309 &buf
[regnr
* RADIO_REGISTER_SIZE
+ 1]);
311 return (retval
< 0) ? -EINVAL
: 0;
316 /**************************************************************************
317 * General Driver Functions - LED_REPORT
318 **************************************************************************/
321 * si470x_set_led_state - sets the led state
323 static int si470x_set_led_state(struct si470x_device
*radio
,
324 unsigned char led_state
)
326 unsigned char buf
[LED_REPORT_SIZE
];
330 buf
[1] = LED_COMMAND
;
333 retval
= si470x_set_report(radio
, (void *) &buf
, sizeof(buf
));
335 return (retval
< 0) ? -EINVAL
: 0;
340 /**************************************************************************
341 * General Driver Functions - SCRATCH_REPORT
342 **************************************************************************/
345 * si470x_get_scratch_versions - gets the scratch page and version infos
347 static int si470x_get_scratch_page_versions(struct si470x_device
*radio
)
349 unsigned char buf
[SCRATCH_REPORT_SIZE
];
352 buf
[0] = SCRATCH_REPORT
;
354 retval
= si470x_get_report(radio
, (void *) &buf
, sizeof(buf
));
357 dev_warn(&radio
->intf
->dev
, "si470x_get_scratch: "
358 "si470x_get_report returned %d\n", retval
);
360 radio
->software_version
= buf
[1];
361 radio
->hardware_version
= buf
[2];
364 return (retval
< 0) ? -EINVAL
: 0;
369 /**************************************************************************
370 * General Driver Functions - DISCONNECT_CHECK
371 **************************************************************************/
374 * si470x_disconnect_check - check whether radio disconnects
376 int si470x_disconnect_check(struct si470x_device
*radio
)
378 if (radio
->disconnected
)
386 /**************************************************************************
387 * RDS Driver Functions
388 **************************************************************************/
391 * si470x_int_in_callback - rds callback and processing function
393 * TODO: do we need to use mutex locks in some sections?
395 static void si470x_int_in_callback(struct urb
*urb
)
397 struct si470x_device
*radio
= urb
->context
;
398 unsigned char buf
[RDS_REPORT_SIZE
];
401 unsigned char blocknum
;
402 unsigned short bler
; /* rds block errors */
404 unsigned char tmpbuf
[3];
407 if (urb
->status
== -ENOENT
||
408 urb
->status
== -ECONNRESET
||
409 urb
->status
== -ESHUTDOWN
) {
412 dev_warn(&radio
->intf
->dev
,
413 "non-zero urb status (%d)\n", urb
->status
);
414 goto resubmit
; /* Maybe we can recover. */
419 if (radio
->disconnected
)
421 if ((radio
->registers
[SYSCONFIG1
] & SYSCONFIG1_RDS
) == 0)
424 if (urb
->actual_length
> 0) {
425 /* Update RDS registers with URB data */
427 for (regnr
= 0; regnr
< RDS_REGISTER_NUM
; regnr
++)
428 radio
->registers
[STATUSRSSI
+ regnr
] =
429 get_unaligned_be16(&radio
->int_in_buffer
[
430 regnr
* RADIO_REGISTER_SIZE
+ 1]);
432 if ((radio
->registers
[STATUSRSSI
] & STATUSRSSI_RDSR
) == 0) {
433 /* No RDS group ready, better luck next time */
436 if ((radio
->registers
[STATUSRSSI
] & STATUSRSSI_RDSS
) == 0) {
437 /* RDS decoder not synchronized */
440 for (blocknum
= 0; blocknum
< 4; blocknum
++) {
443 bler
= (radio
->registers
[STATUSRSSI
] &
444 STATUSRSSI_BLERA
) >> 9;
445 rds
= radio
->registers
[RDSA
];
448 bler
= (radio
->registers
[READCHAN
] &
449 READCHAN_BLERB
) >> 14;
450 rds
= radio
->registers
[RDSB
];
453 bler
= (radio
->registers
[READCHAN
] &
454 READCHAN_BLERC
) >> 12;
455 rds
= radio
->registers
[RDSC
];
458 bler
= (radio
->registers
[READCHAN
] &
459 READCHAN_BLERD
) >> 10;
460 rds
= radio
->registers
[RDSD
];
464 /* Fill the V4L2 RDS buffer */
465 put_unaligned_le16(rds
, &tmpbuf
);
466 tmpbuf
[2] = blocknum
; /* offset name */
467 tmpbuf
[2] |= blocknum
<< 3; /* received offset */
468 if (bler
> max_rds_errors
)
469 tmpbuf
[2] |= 0x80; /* uncorrectable errors */
471 tmpbuf
[2] |= 0x40; /* corrected error(s) */
473 /* copy RDS block to internal buffer */
474 memcpy(&radio
->buffer
[radio
->wr_index
], &tmpbuf
, 3);
475 radio
->wr_index
+= 3;
477 /* wrap write pointer */
478 if (radio
->wr_index
>= radio
->buf_size
)
481 /* check for overflow */
482 if (radio
->wr_index
== radio
->rd_index
) {
483 /* increment and wrap read pointer */
484 radio
->rd_index
+= 3;
485 if (radio
->rd_index
>= radio
->buf_size
)
489 if (radio
->wr_index
!= radio
->rd_index
)
490 wake_up_interruptible(&radio
->read_queue
);
494 /* Resubmit if we're still running. */
495 if (radio
->int_in_running
&& radio
->usbdev
) {
496 retval
= usb_submit_urb(radio
->int_in_urb
, GFP_ATOMIC
);
498 dev_warn(&radio
->intf
->dev
,
499 "resubmitting urb failed (%d)", retval
);
500 radio
->int_in_running
= 0;
507 /**************************************************************************
508 * File Operations Interface
509 **************************************************************************/
512 * si470x_fops_open - file open
514 int si470x_fops_open(struct file
*file
)
516 struct si470x_device
*radio
= video_drvdata(file
);
519 mutex_lock(&radio
->lock
);
522 retval
= usb_autopm_get_interface(radio
->intf
);
529 if (radio
->users
== 1) {
531 retval
= si470x_start(radio
);
533 usb_autopm_put_interface(radio
->intf
);
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;
555 usb_autopm_put_interface(radio
->intf
);
560 mutex_unlock(&radio
->lock
);
566 * si470x_fops_release - file release
568 int si470x_fops_release(struct file
*file
)
570 struct si470x_device
*radio
= video_drvdata(file
);
579 mutex_lock(&radio
->lock
);
581 if (radio
->users
== 0) {
582 /* shutdown interrupt handler */
583 if (radio
->int_in_running
) {
584 radio
->int_in_running
= 0;
585 if (radio
->int_in_urb
)
586 usb_kill_urb(radio
->int_in_urb
);
589 if (radio
->disconnected
) {
590 video_unregister_device(radio
->videodev
);
591 kfree(radio
->int_in_buffer
);
592 kfree(radio
->buffer
);
593 mutex_unlock(&radio
->lock
);
598 /* cancel read processes */
599 wake_up_interruptible(&radio
->read_queue
);
602 retval
= si470x_stop(radio
);
603 usb_autopm_put_interface(radio
->intf
);
605 mutex_unlock(&radio
->lock
);
612 /**************************************************************************
613 * Video4Linux Interface
614 **************************************************************************/
617 * si470x_vidioc_querycap - query device capabilities
619 int si470x_vidioc_querycap(struct file
*file
, void *priv
,
620 struct v4l2_capability
*capability
)
622 struct si470x_device
*radio
= video_drvdata(file
);
624 strlcpy(capability
->driver
, DRIVER_NAME
, sizeof(capability
->driver
));
625 strlcpy(capability
->card
, DRIVER_CARD
, sizeof(capability
->card
));
626 usb_make_path(radio
->usbdev
, capability
->bus_info
,
627 sizeof(capability
->bus_info
));
628 capability
->capabilities
= V4L2_CAP_HW_FREQ_SEEK
|
629 V4L2_CAP_TUNER
| V4L2_CAP_RADIO
| V4L2_CAP_RDS_CAPTURE
;
636 /**************************************************************************
638 **************************************************************************/
641 * si470x_usb_driver_probe - probe for the device
643 static int si470x_usb_driver_probe(struct usb_interface
*intf
,
644 const struct usb_device_id
*id
)
646 struct si470x_device
*radio
;
647 struct usb_host_interface
*iface_desc
;
648 struct usb_endpoint_descriptor
*endpoint
;
649 int i
, int_end_size
, retval
= 0;
650 unsigned char version_warning
= 0;
652 /* private data allocation and initialization */
653 radio
= kzalloc(sizeof(struct si470x_device
), GFP_KERNEL
);
659 radio
->disconnected
= 0;
660 radio
->usbdev
= interface_to_usbdev(intf
);
662 mutex_init(&radio
->lock
);
664 iface_desc
= intf
->cur_altsetting
;
666 /* Set up interrupt endpoint information. */
667 for (i
= 0; i
< iface_desc
->desc
.bNumEndpoints
; ++i
) {
668 endpoint
= &iface_desc
->endpoint
[i
].desc
;
669 if (((endpoint
->bEndpointAddress
& USB_ENDPOINT_DIR_MASK
) ==
670 USB_DIR_IN
) && ((endpoint
->bmAttributes
&
671 USB_ENDPOINT_XFERTYPE_MASK
) == USB_ENDPOINT_XFER_INT
))
672 radio
->int_in_endpoint
= endpoint
;
674 if (!radio
->int_in_endpoint
) {
675 dev_info(&intf
->dev
, "could not find interrupt in endpoint\n");
680 int_end_size
= le16_to_cpu(radio
->int_in_endpoint
->wMaxPacketSize
);
682 radio
->int_in_buffer
= kmalloc(int_end_size
, GFP_KERNEL
);
683 if (!radio
->int_in_buffer
) {
684 dev_info(&intf
->dev
, "could not allocate int_in_buffer");
689 radio
->int_in_urb
= usb_alloc_urb(0, GFP_KERNEL
);
690 if (!radio
->int_in_urb
) {
691 dev_info(&intf
->dev
, "could not allocate int_in_urb");
696 /* video device allocation and initialization */
697 radio
->videodev
= video_device_alloc();
698 if (!radio
->videodev
) {
702 memcpy(radio
->videodev
, &si470x_viddev_template
,
703 sizeof(si470x_viddev_template
));
704 video_set_drvdata(radio
->videodev
, radio
);
706 /* get device and chip versions */
707 if (si470x_get_all_registers(radio
) < 0) {
711 dev_info(&intf
->dev
, "DeviceID=0x%4.4hx ChipID=0x%4.4hx\n",
712 radio
->registers
[DEVICEID
], radio
->registers
[CHIPID
]);
713 if ((radio
->registers
[CHIPID
] & CHIPID_FIRMWARE
) < RADIO_FW_VERSION
) {
715 "This driver is known to work with "
716 "firmware version %hu,\n", RADIO_FW_VERSION
);
718 "but the device has firmware version %hu.\n",
719 radio
->registers
[CHIPID
] & CHIPID_FIRMWARE
);
723 /* get software and hardware versions */
724 if (si470x_get_scratch_page_versions(radio
) < 0) {
728 dev_info(&intf
->dev
, "software version %d, hardware version %d\n",
729 radio
->software_version
, radio
->hardware_version
);
730 if (radio
->software_version
< RADIO_SW_VERSION
) {
732 "This driver is known to work with "
733 "software version %hu,\n", RADIO_SW_VERSION
);
735 "but the device has software version %hu.\n",
736 radio
->software_version
);
739 if (radio
->hardware_version
< RADIO_HW_VERSION
) {
741 "This driver is known to work with "
742 "hardware version %hu,\n", RADIO_HW_VERSION
);
744 "but the device has hardware version %hu.\n",
745 radio
->hardware_version
);
749 /* give out version warning */
750 if (version_warning
== 1) {
752 "If you have some trouble using this driver,\n");
754 "please report to V4L ML at "
755 "linux-media@vger.kernel.org\n");
758 /* set initial frequency */
759 si470x_set_freq(radio
, 87.5 * FREQ_MUL
); /* available in all regions */
761 /* set led to connect state */
762 si470x_set_led_state(radio
, BLINK_GREEN_LED
);
764 /* rds buffer allocation */
765 radio
->buf_size
= rds_buf
* 3;
766 radio
->buffer
= kmalloc(radio
->buf_size
, GFP_KERNEL
);
767 if (!radio
->buffer
) {
772 /* rds buffer configuration */
775 init_waitqueue_head(&radio
->read_queue
);
777 /* register video device */
778 retval
= video_register_device(radio
->videodev
, VFL_TYPE_RADIO
,
781 dev_warn(&intf
->dev
, "Could not register video device\n");
784 usb_set_intfdata(intf
, radio
);
788 kfree(radio
->buffer
);
790 video_device_release(radio
->videodev
);
792 usb_free_urb(radio
->int_in_urb
);
794 kfree(radio
->int_in_buffer
);
803 * si470x_usb_driver_suspend - suspend the device
805 static int si470x_usb_driver_suspend(struct usb_interface
*intf
,
806 pm_message_t message
)
808 dev_info(&intf
->dev
, "suspending now...\n");
815 * si470x_usb_driver_resume - resume the device
817 static int si470x_usb_driver_resume(struct usb_interface
*intf
)
819 dev_info(&intf
->dev
, "resuming now...\n");
826 * si470x_usb_driver_disconnect - disconnect the device
828 static void si470x_usb_driver_disconnect(struct usb_interface
*intf
)
830 struct si470x_device
*radio
= usb_get_intfdata(intf
);
832 mutex_lock(&radio
->lock
);
833 radio
->disconnected
= 1;
834 usb_set_intfdata(intf
, NULL
);
835 if (radio
->users
== 0) {
836 /* set led to disconnect state */
837 si470x_set_led_state(radio
, BLINK_ORANGE_LED
);
839 /* Free data structures. */
840 usb_free_urb(radio
->int_in_urb
);
842 kfree(radio
->int_in_buffer
);
843 video_unregister_device(radio
->videodev
);
844 kfree(radio
->buffer
);
845 mutex_unlock(&radio
->lock
);
848 mutex_unlock(&radio
->lock
);
854 * si470x_usb_driver - usb driver interface
856 static struct usb_driver si470x_usb_driver
= {
858 .probe
= si470x_usb_driver_probe
,
859 .disconnect
= si470x_usb_driver_disconnect
,
860 .suspend
= si470x_usb_driver_suspend
,
861 .resume
= si470x_usb_driver_resume
,
862 .id_table
= si470x_usb_driver_id_table
,
863 .supports_autosuspend
= 1,
868 /**************************************************************************
870 **************************************************************************/
873 * si470x_module_init - module init
875 static int __init
si470x_module_init(void)
877 printk(KERN_INFO DRIVER_DESC
", Version " DRIVER_VERSION
"\n");
878 return usb_register(&si470x_usb_driver
);
883 * si470x_module_exit - module exit
885 static void __exit
si470x_module_exit(void)
887 usb_deregister(&si470x_usb_driver
);
891 module_init(si470x_module_init
);
892 module_exit(si470x_module_exit
);
894 MODULE_LICENSE("GPL");
895 MODULE_AUTHOR(DRIVER_AUTHOR
);
896 MODULE_DESCRIPTION(DRIVER_DESC
);
897 MODULE_VERSION(DRIVER_VERSION
);