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iwlwifi: don't include iwl-dev.h from iwl-devtrace.h
[linux-2.6-block.git] / drivers / media / radio / si470x / radio-si470x-usb.c
CommitLineData
b09cd163
JS		 1/*
2 * drivers/media/radio/si470x/radio-si470x-usb.c
3 *
4 * USB driver for radios with Silicon Labs Si470x FM Radio Receivers
5 *
6 * Copyright (c) 2009 Tobias Lorenz <tobias.lorenz@gmx.net>
7 *
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.
12 *
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.
17 *
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
21 */
22
23
24/*
25 * ToDo:
26 * - add firmware download/update support
27 */
28
29
30/* driver definitions */
31#define DRIVER_AUTHOR "Tobias Lorenz <tobias.lorenz@gmx.net>"
32#define DRIVER_KERNEL_VERSION KERNEL_VERSION(1, 0, 10)
33#define DRIVER_CARD "Silicon Labs Si470x FM Radio Receiver"
34#define DRIVER_DESC "USB radio driver for Si470x FM Radio Receivers"
35#define DRIVER_VERSION "1.0.10"
36
37/* kernel includes */
38#include <linux/usb.h>
39#include <linux/hid.h>
40
41#include "radio-si470x.h"
42
43
44/* USB Device ID List */
45static 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 { }
56};
57MODULE_DEVICE_TABLE(usb, si470x_usb_driver_id_table);
58
59
60
61/**************************************************************************
62 * Module Parameters
63 **************************************************************************/
64
65/* Radio Nr */
66static int radio_nr = -1;
67module_param(radio_nr, int, 0444);
68MODULE_PARM_DESC(radio_nr, "Radio Nr");
69
70/* USB timeout */
71static unsigned int usb_timeout = 500;
72module_param(usb_timeout, uint, 0644);
73MODULE_PARM_DESC(usb_timeout, "USB timeout (ms): *500*");
74
75/* RDS buffer blocks */
76static unsigned int rds_buf = 100;
77module_param(rds_buf, uint, 0444);
78MODULE_PARM_DESC(rds_buf, "RDS buffer entries: *100*");
79
80/* RDS maximum block errors */
81static 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 */
86module_param(max_rds_errors, ushort, 0644);
87MODULE_PARM_DESC(max_rds_errors, "RDS maximum block errors: *1*");
88
89
90
91/**************************************************************************
92 * USB HID Reports
93 **************************************************************************/
94
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)
100
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
105
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
110
111/* Report 19: LED state */
112#define LED_REPORT_SIZE 3
113#define LED_REPORT 19
114
115/* Report 19: stream */
116#define STREAM_REPORT_SIZE 3
117#define STREAM_REPORT 19
118
119/* Report 20: scratch */
120#define SCRATCH_PAGE_SIZE 63
121#define SCRATCH_REPORT_SIZE (SCRATCH_PAGE_SIZE + 1)
122#define SCRATCH_REPORT 20
123
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
133
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
137
138
139
140/**************************************************************************
9dcb79c2 141 * Software/Hardware Versions from Scratch Page
b09cd163
JS		 142 **************************************************************************/
143#define RADIO_SW_VERSION_NOT_BOOTLOADABLE 6
144#define RADIO_SW_VERSION 7
b09cd163
JS		 145#define RADIO_HW_VERSION 1
146
b09cd163
JS		 147
148
149/**************************************************************************
150 * LED State Definitions
151 **************************************************************************/
152#define LED_COMMAND 0x35
153
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
162
163
164
165/**************************************************************************
166 * Stream State Definitions
167 **************************************************************************/
168#define STREAM_COMMAND 0x36
169#define STREAM_VIDPID 0x00
170#define STREAM_AUDIO 0xff
171
172
173
174/**************************************************************************
175 * Bootloader / Flash Commands
176 **************************************************************************/
177
178/* unique id sent to bootloader and required to put into a bootload state */
179#define UNIQUE_BL_ID 0x34
180
181/* mask for the flash data */
182#define FLASH_DATA_MASK 0x55
183
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
194
195/* bootloader command responses */
196#define COMMAND_OK 0x01
197#define COMMAND_FAILED 0x02
198#define COMMAND_PENDING 0x03
199
200
201
202/**************************************************************************
203 * General Driver Functions - REGISTER_REPORTs
204 **************************************************************************/
205
206/*
207 * si470x_get_report - receive a HID report
208 */
209static int si470x_get_report(struct si470x_device *radio, void *buf, int size)
210{
211 unsigned char *report = (unsigned char *) buf;
212 int retval;
213
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);
220
221 if (retval < 0)
a9d6fd5e
JS		 222 dev_warn(&radio->intf->dev,
223 "si470x_get_report: usb_control_msg returned %d\n",
b09cd163
JS		 224 retval);
225 return retval;
226}
227
228
229/*
230 * si470x_set_report - send a HID report
231 */
232static int si470x_set_report(struct si470x_device *radio, void *buf, int size)
233{
234 unsigned char *report = (unsigned char *) buf;
235 int retval;
236
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);
243
244 if (retval < 0)
a9d6fd5e
JS		 245 dev_warn(&radio->intf->dev,
246 "si470x_set_report: usb_control_msg returned %d\n",
b09cd163
JS		 247 retval);
248 return retval;
249}
250
251
252/*
253 * si470x_get_register - read register
254 */
255int si470x_get_register(struct si470x_device *radio, int regnr)
256{
257 unsigned char buf[REGISTER_REPORT_SIZE];
258 int retval;
259
260 buf[0] = REGISTER_REPORT(regnr);
261
262 retval = si470x_get_report(radio, (void *) &buf, sizeof(buf));
263
264 if (retval >= 0)
265 radio->registers[regnr] = get_unaligned_be16(&buf[1]);
266
267 return (retval < 0) ? -EINVAL : 0;
268}
269
270
271/*
272 * si470x_set_register - write register
273 */
274int si470x_set_register(struct si470x_device *radio, int regnr)
275{
276 unsigned char buf[REGISTER_REPORT_SIZE];
277 int retval;
278
279 buf[0] = REGISTER_REPORT(regnr);
280 put_unaligned_be16(radio->registers[regnr], &buf[1]);
281
282 retval = si470x_set_report(radio, (void *) &buf, sizeof(buf));
283
284 return (retval < 0) ? -EINVAL : 0;
285}
286
287
288
289/**************************************************************************
290 * General Driver Functions - ENTIRE_REPORT
291 **************************************************************************/
292
293/*
294 * si470x_get_all_registers - read entire registers
295 */
296static int si470x_get_all_registers(struct si470x_device *radio)
297{
298 unsigned char buf[ENTIRE_REPORT_SIZE];
299 int retval;
300 unsigned char regnr;
301
302 buf[0] = ENTIRE_REPORT;
303
304 retval = si470x_get_report(radio, (void *) &buf, sizeof(buf));
305
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]);
310
311 return (retval < 0) ? -EINVAL : 0;
312}
313
314
315
316/**************************************************************************
317 * General Driver Functions - LED_REPORT
318 **************************************************************************/
319
320/*
321 * si470x_set_led_state - sets the led state
322 */
323static int si470x_set_led_state(struct si470x_device *radio,
324 unsigned char led_state)
325{
326 unsigned char buf[LED_REPORT_SIZE];
327 int retval;
328
329 buf[0] = LED_REPORT;
330 buf[1] = LED_COMMAND;
331 buf[2] = led_state;
332
333 retval = si470x_set_report(radio, (void *) &buf, sizeof(buf));
334
335 return (retval < 0) ? -EINVAL : 0;
336}
337
338
339
340/**************************************************************************
341 * General Driver Functions - SCRATCH_REPORT
342 **************************************************************************/
343
344/*
345 * si470x_get_scratch_versions - gets the scratch page and version infos
346 */
347static int si470x_get_scratch_page_versions(struct si470x_device *radio)
348{
349 unsigned char buf[SCRATCH_REPORT_SIZE];
350 int retval;
351
352 buf[0] = SCRATCH_REPORT;
353
354 retval = si470x_get_report(radio, (void *) &buf, sizeof(buf));
355
356 if (retval < 0)
a9d6fd5e 357 dev_warn(&radio->intf->dev, "si470x_get_scratch: "
b09cd163
JS		 358 "si470x_get_report returned %d\n", retval);
359 else {
360 radio->software_version = buf[1];
361 radio->hardware_version = buf[2];
362 }
363
364 return (retval < 0) ? -EINVAL : 0;
365}
366
367
368
3c7cc8d5
JS		 369/**************************************************************************
370 * General Driver Functions - DISCONNECT_CHECK
371 **************************************************************************/
372
373/*
374 * si470x_disconnect_check - check whether radio disconnects
375 */
376int si470x_disconnect_check(struct si470x_device *radio)
377{
378 if (radio->disconnected)
379 return -EIO;
380 else
381 return 0;
382}
383
384
385
b09cd163
JS		 386/**************************************************************************
387 * RDS Driver Functions
388 **************************************************************************/
389
390/*
391 * si470x_int_in_callback - rds callback and processing function
392 *
393 * TODO: do we need to use mutex locks in some sections?
394 */
395static void si470x_int_in_callback(struct urb *urb)
396{
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];
405
406 if (urb->status) {
407 if (urb->status == -ENOENT ||
408 urb->status == -ECONNRESET ||
409 urb->status == -ESHUTDOWN) {
410 return;
411 } else {
a9d6fd5e
JS		 412 dev_warn(&radio->intf->dev,
413 "non-zero urb status (%d)\n", urb->status);
b09cd163
JS		 414 goto resubmit; /* Maybe we can recover. */
415 }
416 }
417
418 /* safety checks */
419 if (radio->disconnected)
420 return;
421 if ((radio->registers[SYSCONFIG1] & SYSCONFIG1_RDS) == 0)
422 goto resubmit;
423
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;
435 }
436 if ((radio->registers[STATUSRSSI] & STATUSRSSI_RDSS) == 0) {
437 /* RDS decoder not synchronized */
438 goto resubmit;
439 }
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;
462 };
463
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) */
472
473 /* copy RDS block to internal buffer */
474 memcpy(&radio->buffer[radio->wr_index], &tmpbuf, 3);
475 radio->wr_index += 3;
476
477 /* wrap write pointer */
478 if (radio->wr_index >= radio->buf_size)
479 radio->wr_index = 0;
480
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;
487 }
488 }
489 if (radio->wr_index != radio->rd_index)
490 wake_up_interruptible(&radio->read_queue);
491 }
492
493resubmit:
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) {
a9d6fd5e
JS		 498 dev_warn(&radio->intf->dev,
499 "resubmitting urb failed (%d)", retval);
b09cd163
JS		 500 radio->int_in_running = 0;
501 }
502 }
503}
504
505
506
507/**************************************************************************
508 * File Operations Interface
509 **************************************************************************/
510
b09cd163
JS		 511/*
512 * si470x_fops_open - file open
513 */
1aa925c9 514int si470x_fops_open(struct file *file)
b09cd163
JS		 515{
516 struct si470x_device *radio = video_drvdata(file);
517 int retval;
518
519 lock_kernel();
520 radio->users++;
521
522 retval = usb_autopm_get_interface(radio->intf);
523 if (retval < 0) {
524 radio->users--;
525 retval = -EIO;
526 goto done;
527 }
528
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;
535 }
536
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);
546
547 radio->int_in_running = 1;
548 mb();
549
550 retval = usb_submit_urb(radio->int_in_urb, GFP_KERNEL);
551 if (retval) {
a9d6fd5e
JS		 552 dev_info(&radio->intf->dev,
553 "submitting int urb failed (%d)\n", retval);
b09cd163
JS		 554 radio->int_in_running = 0;
555 usb_autopm_put_interface(radio->intf);
556 }
557 }
558
559done:
560 unlock_kernel();
561 return retval;
562}
563
564
565/*
566 * si470x_fops_release - file release
567 */
1aa925c9 568int si470x_fops_release(struct file *file)
b09cd163
JS		 569{
570 struct si470x_device *radio = video_drvdata(file);
571 int retval = 0;
572
573 /* safety check */
574 if (!radio) {
575 retval = -ENODEV;
576 goto done;
577 }
578
579 mutex_lock(&radio->disconnect_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);
587 }
588
589 if (radio->disconnected) {
590 video_unregister_device(radio->videodev);
591 kfree(radio->int_in_buffer);
592 kfree(radio->buffer);
ed0ee8e1 593 mutex_unlock(&radio->disconnect_lock);
b09cd163 594 kfree(radio);
ed0ee8e1 595 goto done;
b09cd163
JS		 596 }
597
598 /* cancel read processes */
599 wake_up_interruptible(&radio->read_queue);
600
601 /* stop radio */
602 retval = si470x_stop(radio);
603 usb_autopm_put_interface(radio->intf);
604 }
b09cd163
JS		 605 mutex_unlock(&radio->disconnect_lock);
606done:
607 return retval;
608}
609
610
b09cd163
JS		 611
612/**************************************************************************
613 * Video4Linux Interface
614 **************************************************************************/
615
616/*
617 * si470x_vidioc_querycap - query device capabilities
618 */
619int si470x_vidioc_querycap(struct file *file, void *priv,
620 struct v4l2_capability *capability)
621{
622 struct si470x_device *radio = video_drvdata(file);
623
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->version = DRIVER_KERNEL_VERSION;
629 capability->capabilities = V4L2_CAP_HW_FREQ_SEEK |
630 V4L2_CAP_TUNER | V4L2_CAP_RADIO | V4L2_CAP_RDS_CAPTURE;
631
632 return 0;
633}
634
635
636
637/**************************************************************************
638 * USB Interface
639 **************************************************************************/
640
641/*
642 * si470x_usb_driver_probe - probe for the device
643 */
644static int si470x_usb_driver_probe(struct usb_interface *intf,
645 const struct usb_device_id *id)
646{
647 struct si470x_device *radio;
648 struct usb_host_interface *iface_desc;
649 struct usb_endpoint_descriptor *endpoint;
650 int i, int_end_size, retval = 0;
9dcb79c2 651 unsigned char version_warning = 0;
b09cd163
JS		 652
653 /* private data allocation and initialization */
654 radio = kzalloc(sizeof(struct si470x_device), GFP_KERNEL);
655 if (!radio) {
656 retval = -ENOMEM;
657 goto err_initial;
658 }
659 radio->users = 0;
660 radio->disconnected = 0;
661 radio->usbdev = interface_to_usbdev(intf);
662 radio->intf = intf;
663 mutex_init(&radio->disconnect_lock);
664 mutex_init(&radio->lock);
665
666 iface_desc = intf->cur_altsetting;
667
668 /* Set up interrupt endpoint information. */
669 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
670 endpoint = &iface_desc->endpoint[i].desc;
671 if (((endpoint->bEndpointAddress & USB_ENDPOINT_DIR_MASK) ==
672 USB_DIR_IN) && ((endpoint->bmAttributes &
673 USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_INT))
674 radio->int_in_endpoint = endpoint;
675 }
676 if (!radio->int_in_endpoint) {
a9d6fd5e 677 dev_info(&intf->dev, "could not find interrupt in endpoint\n");
b09cd163
JS		 678 retval = -EIO;
679 goto err_radio;
680 }
681
682 int_end_size = le16_to_cpu(radio->int_in_endpoint->wMaxPacketSize);
683
684 radio->int_in_buffer = kmalloc(int_end_size, GFP_KERNEL);
685 if (!radio->int_in_buffer) {
a9d6fd5e 686 dev_info(&intf->dev, "could not allocate int_in_buffer");
b09cd163
JS		 687 retval = -ENOMEM;
688 goto err_radio;
689 }
690
691 radio->int_in_urb = usb_alloc_urb(0, GFP_KERNEL);
692 if (!radio->int_in_urb) {
a9d6fd5e 693 dev_info(&intf->dev, "could not allocate int_in_urb");
b09cd163
JS		 694 retval = -ENOMEM;
695 goto err_intbuffer;
696 }
697
698 /* video device allocation and initialization */
699 radio->videodev = video_device_alloc();
700 if (!radio->videodev) {
701 retval = -ENOMEM;
702 goto err_intbuffer;
703 }
704 memcpy(radio->videodev, &si470x_viddev_template,
705 sizeof(si470x_viddev_template));
706 video_set_drvdata(radio->videodev, radio);
707
9dcb79c2 708 /* get device and chip versions */
b09cd163
JS		 709 if (si470x_get_all_registers(radio) < 0) {
710 retval = -EIO;
711 goto err_video;
712 }
a9d6fd5e 713 dev_info(&intf->dev, "DeviceID=0x%4.4hx ChipID=0x%4.4hx\n",
b09cd163 714 radio->registers[DEVICEID], radio->registers[CHIPID]);
9dcb79c2
TL		 715 if ((radio->registers[CHIPID] & CHIPID_FIRMWARE) < RADIO_FW_VERSION) {
716 dev_warn(&intf->dev,
717 "This driver is known to work with "
718 "firmware version %hu,\n", RADIO_FW_VERSION);
719 dev_warn(&intf->dev,
720 "but the device has firmware version %hu.\n",
721 radio->registers[CHIPID] & CHIPID_FIRMWARE);
722 version_warning = 1;
723 }
b09cd163
JS		 724
725 /* get software and hardware versions */
726 if (si470x_get_scratch_page_versions(radio) < 0) {
727 retval = -EIO;
728 goto err_video;
729 }
a9d6fd5e 730 dev_info(&intf->dev, "software version %d, hardware version %d\n",
b09cd163 731 radio->software_version, radio->hardware_version);
9dcb79c2 732 if (radio->software_version < RADIO_SW_VERSION) {
a9d6fd5e
JS		 733 dev_warn(&intf->dev,
734 "This driver is known to work with "
9dcb79c2 735 "software version %hu,\n", RADIO_SW_VERSION);
a9d6fd5e 736 dev_warn(&intf->dev,
9dcb79c2
TL		 737 "but the device has software version %hu.\n",
738 radio->software_version);
739 version_warning = 1;
740 }
741 if (radio->hardware_version < RADIO_HW_VERSION) {
742 dev_warn(&intf->dev,
743 "This driver is known to work with "
744 "hardware version %hu,\n", RADIO_HW_VERSION);
745 dev_warn(&intf->dev,
746 "but the device has hardware version %hu.\n",
747 radio->hardware_version);
748 version_warning = 1;
749 }
750
751 /* give out version warning */
752 if (version_warning == 1) {
a9d6fd5e
JS		 753 dev_warn(&intf->dev,
754 "If you have some trouble using this driver,\n");
755 dev_warn(&intf->dev,
756 "please report to V4L ML at "
b09cd163
JS		 757 "linux-media@vger.kernel.org\n");
758 }
759
760 /* set initial frequency */
761 si470x_set_freq(radio, 87.5 * FREQ_MUL); /* available in all regions */
762
763 /* set led to connect state */
764 si470x_set_led_state(radio, BLINK_GREEN_LED);
765
766 /* rds buffer allocation */
767 radio->buf_size = rds_buf * 3;
768 radio->buffer = kmalloc(radio->buf_size, GFP_KERNEL);
769 if (!radio->buffer) {
770 retval = -EIO;
771 goto err_video;
772 }
773
774 /* rds buffer configuration */
775 radio->wr_index = 0;
776 radio->rd_index = 0;
777 init_waitqueue_head(&radio->read_queue);
778
779 /* register video device */
780 retval = video_register_device(radio->videodev, VFL_TYPE_RADIO,
781 radio_nr);
782 if (retval) {
a9d6fd5e 783 dev_warn(&intf->dev, "Could not register video device\n");
b09cd163
JS		 784 goto err_all;
785 }
786 usb_set_intfdata(intf, radio);
787
788 return 0;
789err_all:
790 kfree(radio->buffer);
791err_video:
792 video_device_release(radio->videodev);
793err_intbuffer:
794 kfree(radio->int_in_buffer);
795err_radio:
796 kfree(radio);
797err_initial:
798 return retval;
799}
800
801
802/*
803 * si470x_usb_driver_suspend - suspend the device
804 */
805static int si470x_usb_driver_suspend(struct usb_interface *intf,
806 pm_message_t message)
807{
a9d6fd5e 808 dev_info(&intf->dev, "suspending now...\n");
b09cd163
JS		 809
810 return 0;
811}
812
813
814/*
815 * si470x_usb_driver_resume - resume the device
816 */
817static int si470x_usb_driver_resume(struct usb_interface *intf)
818{
a9d6fd5e 819 dev_info(&intf->dev, "resuming now...\n");
b09cd163
JS		 820
821 return 0;
822}
823
824
825/*
826 * si470x_usb_driver_disconnect - disconnect the device
827 */
828static void si470x_usb_driver_disconnect(struct usb_interface *intf)
829{
830 struct si470x_device *radio = usb_get_intfdata(intf);
831
832 mutex_lock(&radio->disconnect_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);
838
839 /* Free data structures. */
840 usb_free_urb(radio->int_in_urb);
841
842 kfree(radio->int_in_buffer);
843 video_unregister_device(radio->videodev);
844 kfree(radio->buffer);
96dd6de3 845 mutex_unlock(&radio->disconnect_lock);
b09cd163 846 kfree(radio);
96dd6de3
DJ		 847 } else {
848 mutex_unlock(&radio->disconnect_lock);
b09cd163 849 }
b09cd163
JS		 850}
851
852
853/*
854 * si470x_usb_driver - usb driver interface
855 */
856static 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,
864};
865
866
867
868/**************************************************************************
869 * Module Interface
870 **************************************************************************/
871
872/*
873 * si470x_module_init - module init
874 */
875static int __init si470x_module_init(void)
876{
877 printk(KERN_INFO DRIVER_DESC ", Version " DRIVER_VERSION "\n");
878 return usb_register(&si470x_usb_driver);
879}
880
881
882/*
883 * si470x_module_exit - module exit
884 */
885static void __exit si470x_module_exit(void)
886{
887 usb_deregister(&si470x_usb_driver);
888}
889
890
891module_init(si470x_module_init);
892module_exit(si470x_module_exit);
893
894MODULE_LICENSE("GPL");
895MODULE_AUTHOR(DRIVER_AUTHOR);
896MODULE_DESCRIPTION(DRIVER_DESC);
897MODULE_VERSION(DRIVER_VERSION);
Linux 6.x block layer and io_uring tree(s)