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include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit...
[linux-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>
5a0e3ad6 40#include <linux/slab.h>
b09cd163
JS		 41
42#include "radio-si470x.h"
43
44
45/* USB Device ID List */
46static struct usb_device_id si470x_usb_driver_id_table[] = {
47 /* Silicon Labs USB FM Radio Reference Design */
48 { USB_DEVICE_AND_INTERFACE_INFO(0x10c4, 0x818a, USB_CLASS_HID, 0, 0) },
49 /* ADS/Tech FM Radio Receiver (formerly Instant FM Music) */
50 { USB_DEVICE_AND_INTERFACE_INFO(0x06e1, 0xa155, USB_CLASS_HID, 0, 0) },
51 /* KWorld USB FM Radio SnapMusic Mobile 700 (FM700) */
52 { USB_DEVICE_AND_INTERFACE_INFO(0x1b80, 0xd700, USB_CLASS_HID, 0, 0) },
53 /* Sanei Electric, Inc. FM USB Radio (sold as DealExtreme.com PCear) */
54 { USB_DEVICE_AND_INTERFACE_INFO(0x10c5, 0x819a, USB_CLASS_HID, 0, 0) },
55 /* Terminating entry */
56 { }
57};
58MODULE_DEVICE_TABLE(usb, si470x_usb_driver_id_table);
59
60
61
62/**************************************************************************
63 * Module Parameters
64 **************************************************************************/
65
66/* Radio Nr */
67static int radio_nr = -1;
68module_param(radio_nr, int, 0444);
69MODULE_PARM_DESC(radio_nr, "Radio Nr");
70
71/* USB timeout */
72static unsigned int usb_timeout = 500;
73module_param(usb_timeout, uint, 0644);
74MODULE_PARM_DESC(usb_timeout, "USB timeout (ms): *500*");
75
76/* RDS buffer blocks */
77static unsigned int rds_buf = 100;
78module_param(rds_buf, uint, 0444);
79MODULE_PARM_DESC(rds_buf, "RDS buffer entries: *100*");
80
81/* RDS maximum block errors */
82static unsigned short max_rds_errors = 1;
83/* 0 means 0 errors requiring correction */
84/* 1 means 1-2 errors requiring correction (used by original USBRadio.exe) */
85/* 2 means 3-5 errors requiring correction */
86/* 3 means 6+ errors or errors in checkword, correction not possible */
87module_param(max_rds_errors, ushort, 0644);
88MODULE_PARM_DESC(max_rds_errors, "RDS maximum block errors: *1*");
89
90
91
92/**************************************************************************
93 * USB HID Reports
94 **************************************************************************/
95
96/* Reports 1-16 give direct read/write access to the 16 Si470x registers */
97/* with the (REPORT_ID - 1) corresponding to the register address across USB */
98/* endpoint 0 using GET_REPORT and SET_REPORT */
99#define REGISTER_REPORT_SIZE (RADIO_REGISTER_SIZE + 1)
100#define REGISTER_REPORT(reg) ((reg) + 1)
101
102/* Report 17 gives direct read/write access to the entire Si470x register */
103/* map across endpoint 0 using GET_REPORT and SET_REPORT */
104#define ENTIRE_REPORT_SIZE (RADIO_REGISTER_NUM * RADIO_REGISTER_SIZE + 1)
105#define ENTIRE_REPORT 17
106
107/* Report 18 is used to send the lowest 6 Si470x registers up the HID */
108/* interrupt endpoint 1 to Windows every 20 milliseconds for status */
109#define RDS_REPORT_SIZE (RDS_REGISTER_NUM * RADIO_REGISTER_SIZE + 1)
110#define RDS_REPORT 18
111
112/* Report 19: LED state */
113#define LED_REPORT_SIZE 3
114#define LED_REPORT 19
115
116/* Report 19: stream */
117#define STREAM_REPORT_SIZE 3
118#define STREAM_REPORT 19
119
120/* Report 20: scratch */
121#define SCRATCH_PAGE_SIZE 63
122#define SCRATCH_REPORT_SIZE (SCRATCH_PAGE_SIZE + 1)
123#define SCRATCH_REPORT 20
124
125/* Reports 19-22: flash upgrade of the C8051F321 */
126#define WRITE_REPORT_SIZE 4
127#define WRITE_REPORT 19
128#define FLASH_REPORT_SIZE 64
129#define FLASH_REPORT 20
130#define CRC_REPORT_SIZE 3
131#define CRC_REPORT 21
132#define RESPONSE_REPORT_SIZE 2
133#define RESPONSE_REPORT 22
134
135/* Report 23: currently unused, but can accept 60 byte reports on the HID */
136/* interrupt out endpoint 2 every 1 millisecond */
137#define UNUSED_REPORT 23
138
139
140
141/**************************************************************************
9dcb79c2 142 * Software/Hardware Versions from Scratch Page
b09cd163
JS		 143 **************************************************************************/
144#define RADIO_SW_VERSION_NOT_BOOTLOADABLE 6
145#define RADIO_SW_VERSION 7
b09cd163
JS		 146#define RADIO_HW_VERSION 1
147
b09cd163
JS		 148
149
150/**************************************************************************
151 * LED State Definitions
152 **************************************************************************/
153#define LED_COMMAND 0x35
154
155#define NO_CHANGE_LED 0x00
156#define ALL_COLOR_LED 0x01 /* streaming state */
157#define BLINK_GREEN_LED 0x02 /* connect state */
158#define BLINK_RED_LED 0x04
159#define BLINK_ORANGE_LED 0x10 /* disconnect state */
160#define SOLID_GREEN_LED 0x20 /* tuning/seeking state */
161#define SOLID_RED_LED 0x40 /* bootload state */
162#define SOLID_ORANGE_LED 0x80
163
164
165
166/**************************************************************************
167 * Stream State Definitions
168 **************************************************************************/
169#define STREAM_COMMAND 0x36
170#define STREAM_VIDPID 0x00
171#define STREAM_AUDIO 0xff
172
173
174
175/**************************************************************************
176 * Bootloader / Flash Commands
177 **************************************************************************/
178
179/* unique id sent to bootloader and required to put into a bootload state */
180#define UNIQUE_BL_ID 0x34
181
182/* mask for the flash data */
183#define FLASH_DATA_MASK 0x55
184
185/* bootloader commands */
186#define GET_SW_VERSION_COMMAND 0x00
187#define SET_PAGE_COMMAND 0x01
188#define ERASE_PAGE_COMMAND 0x02
189#define WRITE_PAGE_COMMAND 0x03
190#define CRC_ON_PAGE_COMMAND 0x04
191#define READ_FLASH_BYTE_COMMAND 0x05
192#define RESET_DEVICE_COMMAND 0x06
193#define GET_HW_VERSION_COMMAND 0x07
194#define BLANK 0xff
195
196/* bootloader command responses */
197#define COMMAND_OK 0x01
198#define COMMAND_FAILED 0x02
199#define COMMAND_PENDING 0x03
200
201
202
203/**************************************************************************
204 * General Driver Functions - REGISTER_REPORTs
205 **************************************************************************/
206
207/*
208 * si470x_get_report - receive a HID report
209 */
210static int si470x_get_report(struct si470x_device *radio, void *buf, int size)
211{
212 unsigned char *report = (unsigned char *) buf;
213 int retval;
214
215 retval = usb_control_msg(radio->usbdev,
216 usb_rcvctrlpipe(radio->usbdev, 0),
217 HID_REQ_GET_REPORT,
218 USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,
219 report[0], 2,
220 buf, size, usb_timeout);
221
222 if (retval < 0)
a9d6fd5e
JS		 223 dev_warn(&radio->intf->dev,
224 "si470x_get_report: usb_control_msg returned %d\n",
b09cd163
JS		 225 retval);
226 return retval;
227}
228
229
230/*
231 * si470x_set_report - send a HID report
232 */
233static int si470x_set_report(struct si470x_device *radio, void *buf, int size)
234{
235 unsigned char *report = (unsigned char *) buf;
236 int retval;
237
238 retval = usb_control_msg(radio->usbdev,
239 usb_sndctrlpipe(radio->usbdev, 0),
240 HID_REQ_SET_REPORT,
241 USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_OUT,
242 report[0], 2,
243 buf, size, usb_timeout);
244
245 if (retval < 0)
a9d6fd5e
JS		 246 dev_warn(&radio->intf->dev,
247 "si470x_set_report: usb_control_msg returned %d\n",
b09cd163
JS		 248 retval);
249 return retval;
250}
251
252
253/*
254 * si470x_get_register - read register
255 */
256int si470x_get_register(struct si470x_device *radio, int regnr)
257{
258 unsigned char buf[REGISTER_REPORT_SIZE];
259 int retval;
260
261 buf[0] = REGISTER_REPORT(regnr);
262
263 retval = si470x_get_report(radio, (void *) &buf, sizeof(buf));
264
265 if (retval >= 0)
266 radio->registers[regnr] = get_unaligned_be16(&buf[1]);
267
268 return (retval < 0) ? -EINVAL : 0;
269}
270
271
272/*
273 * si470x_set_register - write register
274 */
275int si470x_set_register(struct si470x_device *radio, int regnr)
276{
277 unsigned char buf[REGISTER_REPORT_SIZE];
278 int retval;
279
280 buf[0] = REGISTER_REPORT(regnr);
281 put_unaligned_be16(radio->registers[regnr], &buf[1]);
282
283 retval = si470x_set_report(radio, (void *) &buf, sizeof(buf));
284
285 return (retval < 0) ? -EINVAL : 0;
286}
287
288
289
290/**************************************************************************
291 * General Driver Functions - ENTIRE_REPORT
292 **************************************************************************/
293
294/*
295 * si470x_get_all_registers - read entire registers
296 */
297static int si470x_get_all_registers(struct si470x_device *radio)
298{
299 unsigned char buf[ENTIRE_REPORT_SIZE];
300 int retval;
301 unsigned char regnr;
302
303 buf[0] = ENTIRE_REPORT;
304
305 retval = si470x_get_report(radio, (void *) &buf, sizeof(buf));
306
307 if (retval >= 0)
308 for (regnr = 0; regnr < RADIO_REGISTER_NUM; regnr++)
309 radio->registers[regnr] = get_unaligned_be16(
310 &buf[regnr * RADIO_REGISTER_SIZE + 1]);
311
312 return (retval < 0) ? -EINVAL : 0;
313}
314
315
316
317/**************************************************************************
318 * General Driver Functions - LED_REPORT
319 **************************************************************************/
320
321/*
322 * si470x_set_led_state - sets the led state
323 */
324static int si470x_set_led_state(struct si470x_device *radio,
325 unsigned char led_state)
326{
327 unsigned char buf[LED_REPORT_SIZE];
328 int retval;
329
330 buf[0] = LED_REPORT;
331 buf[1] = LED_COMMAND;
332 buf[2] = led_state;
333
334 retval = si470x_set_report(radio, (void *) &buf, sizeof(buf));
335
336 return (retval < 0) ? -EINVAL : 0;
337}
338
339
340
341/**************************************************************************
342 * General Driver Functions - SCRATCH_REPORT
343 **************************************************************************/
344
345/*
346 * si470x_get_scratch_versions - gets the scratch page and version infos
347 */
348static int si470x_get_scratch_page_versions(struct si470x_device *radio)
349{
350 unsigned char buf[SCRATCH_REPORT_SIZE];
351 int retval;
352
353 buf[0] = SCRATCH_REPORT;
354
355 retval = si470x_get_report(radio, (void *) &buf, sizeof(buf));
356
357 if (retval < 0)
a9d6fd5e 358 dev_warn(&radio->intf->dev, "si470x_get_scratch: "
b09cd163
JS		 359 "si470x_get_report returned %d\n", retval);
360 else {
361 radio->software_version = buf[1];
362 radio->hardware_version = buf[2];
363 }
364
365 return (retval < 0) ? -EINVAL : 0;
366}
367
368
369
3c7cc8d5
JS		 370/**************************************************************************
371 * General Driver Functions - DISCONNECT_CHECK
372 **************************************************************************/
373
374/*
375 * si470x_disconnect_check - check whether radio disconnects
376 */
377int si470x_disconnect_check(struct si470x_device *radio)
378{
379 if (radio->disconnected)
380 return -EIO;
381 else
382 return 0;
383}
384
385
386
b09cd163
JS		 387/**************************************************************************
388 * RDS Driver Functions
389 **************************************************************************/
390
391/*
392 * si470x_int_in_callback - rds callback and processing function
393 *
394 * TODO: do we need to use mutex locks in some sections?
395 */
396static void si470x_int_in_callback(struct urb *urb)
397{
398 struct si470x_device *radio = urb->context;
399 unsigned char buf[RDS_REPORT_SIZE];
400 int retval;
401 unsigned char regnr;
402 unsigned char blocknum;
403 unsigned short bler; /* rds block errors */
404 unsigned short rds;
405 unsigned char tmpbuf[3];
406
407 if (urb->status) {
408 if (urb->status == -ENOENT ||
409 urb->status == -ECONNRESET ||
410 urb->status == -ESHUTDOWN) {
411 return;
412 } else {
a9d6fd5e
JS		 413 dev_warn(&radio->intf->dev,
414 "non-zero urb status (%d)\n", urb->status);
b09cd163
JS		 415 goto resubmit; /* Maybe we can recover. */
416 }
417 }
418
419 /* safety checks */
420 if (radio->disconnected)
421 return;
422 if ((radio->registers[SYSCONFIG1] & SYSCONFIG1_RDS) == 0)
423 goto resubmit;
424
425 if (urb->actual_length > 0) {
426 /* Update RDS registers with URB data */
427 buf[0] = RDS_REPORT;
428 for (regnr = 0; regnr < RDS_REGISTER_NUM; regnr++)
429 radio->registers[STATUSRSSI + regnr] =
430 get_unaligned_be16(&radio->int_in_buffer[
431 regnr * RADIO_REGISTER_SIZE + 1]);
432 /* get rds blocks */
433 if ((radio->registers[STATUSRSSI] & STATUSRSSI_RDSR) == 0) {
434 /* No RDS group ready, better luck next time */
435 goto resubmit;
436 }
437 if ((radio->registers[STATUSRSSI] & STATUSRSSI_RDSS) == 0) {
438 /* RDS decoder not synchronized */
439 goto resubmit;
440 }
441 for (blocknum = 0; blocknum < 4; blocknum++) {
442 switch (blocknum) {
443 default:
444 bler = (radio->registers[STATUSRSSI] &
445 STATUSRSSI_BLERA) >> 9;
446 rds = radio->registers[RDSA];
447 break;
448 case 1:
449 bler = (radio->registers[READCHAN] &
450 READCHAN_BLERB) >> 14;
451 rds = radio->registers[RDSB];
452 break;
453 case 2:
454 bler = (radio->registers[READCHAN] &
455 READCHAN_BLERC) >> 12;
456 rds = radio->registers[RDSC];
457 break;
458 case 3:
459 bler = (radio->registers[READCHAN] &
460 READCHAN_BLERD) >> 10;
461 rds = radio->registers[RDSD];
462 break;
463 };
464
465 /* Fill the V4L2 RDS buffer */
466 put_unaligned_le16(rds, &tmpbuf);
467 tmpbuf[2] = blocknum; /* offset name */
468 tmpbuf[2] |= blocknum << 3; /* received offset */
469 if (bler > max_rds_errors)
470 tmpbuf[2] |= 0x80; /* uncorrectable errors */
471 else if (bler > 0)
472 tmpbuf[2] |= 0x40; /* corrected error(s) */
473
474 /* copy RDS block to internal buffer */
475 memcpy(&radio->buffer[radio->wr_index], &tmpbuf, 3);
476 radio->wr_index += 3;
477
478 /* wrap write pointer */
479 if (radio->wr_index >= radio->buf_size)
480 radio->wr_index = 0;
481
482 /* check for overflow */
483 if (radio->wr_index == radio->rd_index) {
484 /* increment and wrap read pointer */
485 radio->rd_index += 3;
486 if (radio->rd_index >= radio->buf_size)
487 radio->rd_index = 0;
488 }
489 }
490 if (radio->wr_index != radio->rd_index)
491 wake_up_interruptible(&radio->read_queue);
492 }
493
494resubmit:
495 /* Resubmit if we're still running. */
496 if (radio->int_in_running && radio->usbdev) {
497 retval = usb_submit_urb(radio->int_in_urb, GFP_ATOMIC);
498 if (retval) {
a9d6fd5e
JS		 499 dev_warn(&radio->intf->dev,
500 "resubmitting urb failed (%d)", retval);
b09cd163
JS		 501 radio->int_in_running = 0;
502 }
503 }
504}
505
506
507
508/**************************************************************************
509 * File Operations Interface
510 **************************************************************************/
511
b09cd163
JS		 512/*
513 * si470x_fops_open - file open
514 */
1aa925c9 515int si470x_fops_open(struct file *file)
b09cd163
JS		 516{
517 struct si470x_device *radio = video_drvdata(file);
518 int retval;
519
520 lock_kernel();
521 radio->users++;
522
523 retval = usb_autopm_get_interface(radio->intf);
524 if (retval < 0) {
525 radio->users--;
526 retval = -EIO;
527 goto done;
528 }
529
530 if (radio->users == 1) {
531 /* start radio */
532 retval = si470x_start(radio);
533 if (retval < 0) {
534 usb_autopm_put_interface(radio->intf);
535 goto done;
536 }
537
538 /* initialize interrupt urb */
539 usb_fill_int_urb(radio->int_in_urb, radio->usbdev,
540 usb_rcvintpipe(radio->usbdev,
541 radio->int_in_endpoint->bEndpointAddress),
542 radio->int_in_buffer,
543 le16_to_cpu(radio->int_in_endpoint->wMaxPacketSize),
544 si470x_int_in_callback,
545 radio,
546 radio->int_in_endpoint->bInterval);
547
548 radio->int_in_running = 1;
549 mb();
550
551 retval = usb_submit_urb(radio->int_in_urb, GFP_KERNEL);
552 if (retval) {
a9d6fd5e
JS		 553 dev_info(&radio->intf->dev,
554 "submitting int urb failed (%d)\n", retval);
b09cd163
JS		 555 radio->int_in_running = 0;
556 usb_autopm_put_interface(radio->intf);
557 }
558 }
559
560done:
561 unlock_kernel();
562 return retval;
563}
564
565
566/*
567 * si470x_fops_release - file release
568 */
1aa925c9 569int si470x_fops_release(struct file *file)
b09cd163
JS		 570{
571 struct si470x_device *radio = video_drvdata(file);
572 int retval = 0;
573
574 /* safety check */
575 if (!radio) {
576 retval = -ENODEV;
577 goto done;
578 }
579
580 mutex_lock(&radio->disconnect_lock);
581 radio->users--;
582 if (radio->users == 0) {
583 /* shutdown interrupt handler */
584 if (radio->int_in_running) {
585 radio->int_in_running = 0;
586 if (radio->int_in_urb)
587 usb_kill_urb(radio->int_in_urb);
588 }
589
590 if (radio->disconnected) {
591 video_unregister_device(radio->videodev);
592 kfree(radio->int_in_buffer);
593 kfree(radio->buffer);
ed0ee8e1 594 mutex_unlock(&radio->disconnect_lock);
b09cd163 595 kfree(radio);
ed0ee8e1 596 goto done;
b09cd163
JS		 597 }
598
599 /* cancel read processes */
600 wake_up_interruptible(&radio->read_queue);
601
602 /* stop radio */
603 retval = si470x_stop(radio);
604 usb_autopm_put_interface(radio->intf);
605 }
b09cd163
JS		 606 mutex_unlock(&radio->disconnect_lock);
607done:
608 return retval;
609}
610
611
b09cd163
JS		 612
613/**************************************************************************
614 * Video4Linux Interface
615 **************************************************************************/
616
617/*
618 * si470x_vidioc_querycap - query device capabilities
619 */
620int si470x_vidioc_querycap(struct file *file, void *priv,
621 struct v4l2_capability *capability)
622{
623 struct si470x_device *radio = video_drvdata(file);
624
625 strlcpy(capability->driver, DRIVER_NAME, sizeof(capability->driver));
626 strlcpy(capability->card, DRIVER_CARD, sizeof(capability->card));
627 usb_make_path(radio->usbdev, capability->bus_info,
628 sizeof(capability->bus_info));
629 capability->version = DRIVER_KERNEL_VERSION;
630 capability->capabilities = V4L2_CAP_HW_FREQ_SEEK |
631 V4L2_CAP_TUNER | V4L2_CAP_RADIO | V4L2_CAP_RDS_CAPTURE;
632
633 return 0;
634}
635
636
637
638/**************************************************************************
639 * USB Interface
640 **************************************************************************/
641
642/*
643 * si470x_usb_driver_probe - probe for the device
644 */
645static int si470x_usb_driver_probe(struct usb_interface *intf,
646 const struct usb_device_id *id)
647{
648 struct si470x_device *radio;
649 struct usb_host_interface *iface_desc;
650 struct usb_endpoint_descriptor *endpoint;
651 int i, int_end_size, retval = 0;
9dcb79c2 652 unsigned char version_warning = 0;
b09cd163
JS		 653
654 /* private data allocation and initialization */
655 radio = kzalloc(sizeof(struct si470x_device), GFP_KERNEL);
656 if (!radio) {
657 retval = -ENOMEM;
658 goto err_initial;
659 }
660 radio->users = 0;
661 radio->disconnected = 0;
662 radio->usbdev = interface_to_usbdev(intf);
663 radio->intf = intf;
664 mutex_init(&radio->disconnect_lock);
665 mutex_init(&radio->lock);
666
667 iface_desc = intf->cur_altsetting;
668
669 /* Set up interrupt endpoint information. */
670 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
671 endpoint = &iface_desc->endpoint[i].desc;
672 if (((endpoint->bEndpointAddress & USB_ENDPOINT_DIR_MASK) ==
673 USB_DIR_IN) && ((endpoint->bmAttributes &
674 USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_INT))
675 radio->int_in_endpoint = endpoint;
676 }
677 if (!radio->int_in_endpoint) {
a9d6fd5e 678 dev_info(&intf->dev, "could not find interrupt in endpoint\n");
b09cd163
JS		 679 retval = -EIO;
680 goto err_radio;
681 }
682
683 int_end_size = le16_to_cpu(radio->int_in_endpoint->wMaxPacketSize);
684
685 radio->int_in_buffer = kmalloc(int_end_size, GFP_KERNEL);
686 if (!radio->int_in_buffer) {
a9d6fd5e 687 dev_info(&intf->dev, "could not allocate int_in_buffer");
b09cd163
JS		 688 retval = -ENOMEM;
689 goto err_radio;
690 }
691
692 radio->int_in_urb = usb_alloc_urb(0, GFP_KERNEL);
693 if (!radio->int_in_urb) {
a9d6fd5e 694 dev_info(&intf->dev, "could not allocate int_in_urb");
b09cd163
JS		 695 retval = -ENOMEM;
696 goto err_intbuffer;
697 }
698
699 /* video device allocation and initialization */
700 radio->videodev = video_device_alloc();
701 if (!radio->videodev) {
702 retval = -ENOMEM;
703 goto err_intbuffer;
704 }
705 memcpy(radio->videodev, &si470x_viddev_template,
706 sizeof(si470x_viddev_template));
707 video_set_drvdata(radio->videodev, radio);
708
9dcb79c2 709 /* get device and chip versions */
b09cd163
JS		 710 if (si470x_get_all_registers(radio) < 0) {
711 retval = -EIO;
712 goto err_video;
713 }
a9d6fd5e 714 dev_info(&intf->dev, "DeviceID=0x%4.4hx ChipID=0x%4.4hx\n",
b09cd163 715 radio->registers[DEVICEID], radio->registers[CHIPID]);
9dcb79c2
TL		 716 if ((radio->registers[CHIPID] & CHIPID_FIRMWARE) < RADIO_FW_VERSION) {
717 dev_warn(&intf->dev,
718 "This driver is known to work with "
719 "firmware version %hu,\n", RADIO_FW_VERSION);
720 dev_warn(&intf->dev,
721 "but the device has firmware version %hu.\n",
722 radio->registers[CHIPID] & CHIPID_FIRMWARE);
723 version_warning = 1;
724 }
b09cd163
JS		 725
726 /* get software and hardware versions */
727 if (si470x_get_scratch_page_versions(radio) < 0) {
728 retval = -EIO;
729 goto err_video;
730 }
a9d6fd5e 731 dev_info(&intf->dev, "software version %d, hardware version %d\n",
b09cd163 732 radio->software_version, radio->hardware_version);
9dcb79c2 733 if (radio->software_version < RADIO_SW_VERSION) {
a9d6fd5e
JS		 734 dev_warn(&intf->dev,
735 "This driver is known to work with "
9dcb79c2 736 "software version %hu,\n", RADIO_SW_VERSION);
a9d6fd5e 737 dev_warn(&intf->dev,
9dcb79c2
TL		 738 "but the device has software version %hu.\n",
739 radio->software_version);
740 version_warning = 1;
741 }
742 if (radio->hardware_version < RADIO_HW_VERSION) {
743 dev_warn(&intf->dev,
744 "This driver is known to work with "
745 "hardware version %hu,\n", RADIO_HW_VERSION);
746 dev_warn(&intf->dev,
747 "but the device has hardware version %hu.\n",
748 radio->hardware_version);
749 version_warning = 1;
750 }
751
752 /* give out version warning */
753 if (version_warning == 1) {
a9d6fd5e
JS		 754 dev_warn(&intf->dev,
755 "If you have some trouble using this driver,\n");
756 dev_warn(&intf->dev,
757 "please report to V4L ML at "
b09cd163
JS		 758 "linux-media@vger.kernel.org\n");
759 }
760
761 /* set initial frequency */
762 si470x_set_freq(radio, 87.5 * FREQ_MUL); /* available in all regions */
763
764 /* set led to connect state */
765 si470x_set_led_state(radio, BLINK_GREEN_LED);
766
767 /* rds buffer allocation */
768 radio->buf_size = rds_buf * 3;
769 radio->buffer = kmalloc(radio->buf_size, GFP_KERNEL);
770 if (!radio->buffer) {
771 retval = -EIO;
772 goto err_video;
773 }
774
775 /* rds buffer configuration */
776 radio->wr_index = 0;
777 radio->rd_index = 0;
778 init_waitqueue_head(&radio->read_queue);
779
780 /* register video device */
781 retval = video_register_device(radio->videodev, VFL_TYPE_RADIO,
782 radio_nr);
783 if (retval) {
a9d6fd5e 784 dev_warn(&intf->dev, "Could not register video device\n");
b09cd163
JS		 785 goto err_all;
786 }
787 usb_set_intfdata(intf, radio);
788
789 return 0;
790err_all:
791 kfree(radio->buffer);
792err_video:
793 video_device_release(radio->videodev);
794err_intbuffer:
795 kfree(radio->int_in_buffer);
796err_radio:
797 kfree(radio);
798err_initial:
799 return retval;
800}
801
802
803/*
804 * si470x_usb_driver_suspend - suspend the device
805 */
806static int si470x_usb_driver_suspend(struct usb_interface *intf,
807 pm_message_t message)
808{
a9d6fd5e 809 dev_info(&intf->dev, "suspending now...\n");
b09cd163
JS		 810
811 return 0;
812}
813
814
815/*
816 * si470x_usb_driver_resume - resume the device
817 */
818static int si470x_usb_driver_resume(struct usb_interface *intf)
819{
a9d6fd5e 820 dev_info(&intf->dev, "resuming now...\n");
b09cd163
JS		 821
822 return 0;
823}
824
825
826/*
827 * si470x_usb_driver_disconnect - disconnect the device
828 */
829static void si470x_usb_driver_disconnect(struct usb_interface *intf)
830{
831 struct si470x_device *radio = usb_get_intfdata(intf);
832
833 mutex_lock(&radio->disconnect_lock);
834 radio->disconnected = 1;
835 usb_set_intfdata(intf, NULL);
836 if (radio->users == 0) {
837 /* set led to disconnect state */
838 si470x_set_led_state(radio, BLINK_ORANGE_LED);
839
840 /* Free data structures. */
841 usb_free_urb(radio->int_in_urb);
842
843 kfree(radio->int_in_buffer);
844 video_unregister_device(radio->videodev);
845 kfree(radio->buffer);
96dd6de3 846 mutex_unlock(&radio->disconnect_lock);
b09cd163 847 kfree(radio);
96dd6de3
DJ		 848 } else {
849 mutex_unlock(&radio->disconnect_lock);
b09cd163 850 }
b09cd163
JS		 851}
852
853
854/*
855 * si470x_usb_driver - usb driver interface
856 */
857static struct usb_driver si470x_usb_driver = {
858 .name = DRIVER_NAME,
859 .probe = si470x_usb_driver_probe,
860 .disconnect = si470x_usb_driver_disconnect,
861 .suspend = si470x_usb_driver_suspend,
862 .resume = si470x_usb_driver_resume,
863 .id_table = si470x_usb_driver_id_table,
864 .supports_autosuspend = 1,
865};
866
867
868
869/**************************************************************************
870 * Module Interface
871 **************************************************************************/
872
873/*
874 * si470x_module_init - module init
875 */
876static int __init si470x_module_init(void)
877{
878 printk(KERN_INFO DRIVER_DESC ", Version " DRIVER_VERSION "\n");
879 return usb_register(&si470x_usb_driver);
880}
881
882
883/*
884 * si470x_module_exit - module exit
885 */
886static void __exit si470x_module_exit(void)
887{
888 usb_deregister(&si470x_usb_driver);
889}
890
891
892module_init(si470x_module_init);
893module_exit(si470x_module_exit);
894
895MODULE_LICENSE("GPL");
896MODULE_AUTHOR(DRIVER_AUTHOR);
897MODULE_DESCRIPTION(DRIVER_DESC);
898MODULE_VERSION(DRIVER_VERSION);
Linux 6.x block layer and io_uring tree(s)