Merge remote-tracking branch 'moduleh/module.h-split'
[linux-2.6/next.git] / drivers / media / radio / si470x / radio-si470x-usb.c
blob4cf537043f99ec420ae8ebb6f960642a72bf9a5c
1 /*
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
25 * ToDo:
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"
36 /* kernel includes */
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 */
55 { }
57 MODULE_DEVICE_TABLE(usb, si470x_usb_driver_id_table);
61 /**************************************************************************
62 * Module Parameters
63 **************************************************************************/
65 /* Radio Nr */
66 static int radio_nr = -1;
67 module_param(radio_nr, int, 0444);
68 MODULE_PARM_DESC(radio_nr, "Radio Nr");
70 /* USB timeout */
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 /**************************************************************************
92 * USB HID Reports
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
193 #define BLANK 0xff
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;
212 int retval;
214 retval = usb_control_msg(radio->usbdev,
215 usb_rcvctrlpipe(radio->usbdev, 0),
216 HID_REQ_GET_REPORT,
217 USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,
218 report[0], 2,
219 buf, size, usb_timeout);
221 if (retval < 0)
222 dev_warn(&radio->intf->dev,
223 "si470x_get_report: usb_control_msg returned %d\n",
224 retval);
225 return retval;
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;
235 int retval;
237 retval = usb_control_msg(radio->usbdev,
238 usb_sndctrlpipe(radio->usbdev, 0),
239 HID_REQ_SET_REPORT,
240 USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_OUT,
241 report[0], 2,
242 buf, size, usb_timeout);
244 if (retval < 0)
245 dev_warn(&radio->intf->dev,
246 "si470x_set_report: usb_control_msg returned %d\n",
247 retval);
248 return retval;
253 * si470x_get_register - read register
255 int si470x_get_register(struct si470x_device *radio, int regnr)
257 unsigned char buf[REGISTER_REPORT_SIZE];
258 int retval;
260 buf[0] = REGISTER_REPORT(regnr);
262 retval = si470x_get_report(radio, (void *) &buf, sizeof(buf));
264 if (retval >= 0)
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];
277 int retval;
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];
299 int retval;
300 unsigned char regnr;
302 buf[0] = ENTIRE_REPORT;
304 retval = si470x_get_report(radio, (void *) &buf, sizeof(buf));
306 if (retval >= 0)
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];
327 int retval;
329 buf[0] = LED_REPORT;
330 buf[1] = LED_COMMAND;
331 buf[2] = led_state;
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];
350 int retval;
352 buf[0] = SCRATCH_REPORT;
354 retval = si470x_get_report(radio, (void *) &buf, sizeof(buf));
356 if (retval < 0)
357 dev_warn(&radio->intf->dev, "si470x_get_scratch: "
358 "si470x_get_report returned %d\n", retval);
359 else {
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)
379 return -EIO;
380 else
381 return 0;
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];
399 int retval;
400 unsigned char regnr;
401 unsigned char blocknum;
402 unsigned short bler; /* rds block errors */
403 unsigned short rds;
404 unsigned char tmpbuf[3];
406 if (urb->status) {
407 if (urb->status == -ENOENT ||
408 urb->status == -ECONNRESET ||
409 urb->status == -ESHUTDOWN) {
410 return;
411 } else {
412 dev_warn(&radio->intf->dev,
413 "non-zero urb status (%d)\n", urb->status);
414 goto resubmit; /* Maybe we can recover. */
418 /* safety checks */
419 if (radio->disconnected)
420 return;
421 if ((radio->registers[SYSCONFIG1] & SYSCONFIG1_RDS) == 0)
422 goto resubmit;
424 if (urb->actual_length > 0) {
425 /* Update RDS registers with URB data */
426 buf[0] = RDS_REPORT;
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]);
431 /* get rds blocks */
432 if ((radio->registers[STATUSRSSI] & STATUSRSSI_RDSR) == 0) {
433 /* No RDS group ready, better luck next time */
434 goto resubmit;
436 if ((radio->registers[STATUSRSSI] & STATUSRSSI_RDSS) == 0) {
437 /* RDS decoder not synchronized */
438 goto resubmit;
440 for (blocknum = 0; blocknum < 4; blocknum++) {
441 switch (blocknum) {
442 default:
443 bler = (radio->registers[STATUSRSSI] &
444 STATUSRSSI_BLERA) >> 9;
445 rds = radio->registers[RDSA];
446 break;
447 case 1:
448 bler = (radio->registers[READCHAN] &
449 READCHAN_BLERB) >> 14;
450 rds = radio->registers[RDSB];
451 break;
452 case 2:
453 bler = (radio->registers[READCHAN] &
454 READCHAN_BLERC) >> 12;
455 rds = radio->registers[RDSC];
456 break;
457 case 3:
458 bler = (radio->registers[READCHAN] &
459 READCHAN_BLERD) >> 10;
460 rds = radio->registers[RDSD];
461 break;
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 */
470 else if (bler > 0)
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)
479 radio->wr_index = 0;
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)
486 radio->rd_index = 0;
489 if (radio->wr_index != radio->rd_index)
490 wake_up_interruptible(&radio->read_queue);
493 resubmit:
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);
497 if (retval) {
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);
517 int retval;
519 mutex_lock(&radio->lock);
520 radio->users++;
522 retval = usb_autopm_get_interface(radio->intf);
523 if (retval < 0) {
524 radio->users--;
525 retval = -EIO;
526 goto done;
529 if (radio->users == 1) {
530 /* start radio */
531 retval = si470x_start(radio);
532 if (retval < 0) {
533 usb_autopm_put_interface(radio->intf);
534 goto done;
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,
544 radio,
545 radio->int_in_endpoint->bInterval);
547 radio->int_in_running = 1;
548 mb();
550 retval = usb_submit_urb(radio->int_in_urb, GFP_KERNEL);
551 if (retval) {
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);
559 done:
560 mutex_unlock(&radio->lock);
561 return retval;
566 * si470x_fops_release - file release
568 int si470x_fops_release(struct file *file)
570 struct si470x_device *radio = video_drvdata(file);
571 int retval = 0;
573 /* safety check */
574 if (!radio) {
575 retval = -ENODEV;
576 goto done;
579 mutex_lock(&radio->lock);
580 radio->users--;
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);
594 kfree(radio);
595 goto done;
598 /* cancel read processes */
599 wake_up_interruptible(&radio->read_queue);
601 /* stop radio */
602 retval = si470x_stop(radio);
603 usb_autopm_put_interface(radio->intf);
605 mutex_unlock(&radio->lock);
606 done:
607 return retval;
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;
631 return 0;
636 /**************************************************************************
637 * USB Interface
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);
654 if (!radio) {
655 retval = -ENOMEM;
656 goto err_initial;
658 radio->users = 0;
659 radio->disconnected = 0;
660 radio->usbdev = interface_to_usbdev(intf);
661 radio->intf = 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");
676 retval = -EIO;
677 goto err_radio;
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");
685 retval = -ENOMEM;
686 goto err_radio;
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");
692 retval = -ENOMEM;
693 goto err_intbuffer;
696 /* video device allocation and initialization */
697 radio->videodev = video_device_alloc();
698 if (!radio->videodev) {
699 retval = -ENOMEM;
700 goto err_urb;
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) {
708 retval = -EIO;
709 goto err_video;
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) {
714 dev_warn(&intf->dev,
715 "This driver is known to work with "
716 "firmware version %hu,\n", RADIO_FW_VERSION);
717 dev_warn(&intf->dev,
718 "but the device has firmware version %hu.\n",
719 radio->registers[CHIPID] & CHIPID_FIRMWARE);
720 version_warning = 1;
723 /* get software and hardware versions */
724 if (si470x_get_scratch_page_versions(radio) < 0) {
725 retval = -EIO;
726 goto err_video;
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) {
731 dev_warn(&intf->dev,
732 "This driver is known to work with "
733 "software version %hu,\n", RADIO_SW_VERSION);
734 dev_warn(&intf->dev,
735 "but the device has software version %hu.\n",
736 radio->software_version);
737 version_warning = 1;
739 if (radio->hardware_version < RADIO_HW_VERSION) {
740 dev_warn(&intf->dev,
741 "This driver is known to work with "
742 "hardware version %hu,\n", RADIO_HW_VERSION);
743 dev_warn(&intf->dev,
744 "but the device has hardware version %hu.\n",
745 radio->hardware_version);
746 version_warning = 1;
749 /* give out version warning */
750 if (version_warning == 1) {
751 dev_warn(&intf->dev,
752 "If you have some trouble using this driver,\n");
753 dev_warn(&intf->dev,
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) {
768 retval = -EIO;
769 goto err_video;
772 /* rds buffer configuration */
773 radio->wr_index = 0;
774 radio->rd_index = 0;
775 init_waitqueue_head(&radio->read_queue);
777 /* register video device */
778 retval = video_register_device(radio->videodev, VFL_TYPE_RADIO,
779 radio_nr);
780 if (retval) {
781 dev_warn(&intf->dev, "Could not register video device\n");
782 goto err_all;
784 usb_set_intfdata(intf, radio);
786 return 0;
787 err_all:
788 kfree(radio->buffer);
789 err_video:
790 video_device_release(radio->videodev);
791 err_urb:
792 usb_free_urb(radio->int_in_urb);
793 err_intbuffer:
794 kfree(radio->int_in_buffer);
795 err_radio:
796 kfree(radio);
797 err_initial:
798 return retval;
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");
810 return 0;
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");
821 return 0;
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);
846 kfree(radio);
847 } else {
848 mutex_unlock(&radio->lock);
854 * si470x_usb_driver - usb driver interface
856 static struct usb_driver si470x_usb_driver = {
857 .name = DRIVER_NAME,
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 /**************************************************************************
869 * Module Interface
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);