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[media] media: Include linux/kernel.h for DIV_ROUND_UP()
[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>"
b09cd163
JS		 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"
35
36/* kernel includes */
37#include <linux/usb.h>
38#include <linux/hid.h>
5a0e3ad6 39#include <linux/slab.h>
b09cd163
JS		 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) },
11030183
HG		 54 /* Axentia ALERT FM USB Receiver */
55 { USB_DEVICE_AND_INTERFACE_INFO(0x12cf, 0x7111, USB_CLASS_HID, 0, 0) },
b09cd163
JS		 56 /* Terminating entry */
57 { }
58};
59MODULE_DEVICE_TABLE(usb, si470x_usb_driver_id_table);
60
61
62
63/**************************************************************************
64 * Module Parameters
65 **************************************************************************/
66
67/* Radio Nr */
68static int radio_nr = -1;
69module_param(radio_nr, int, 0444);
70MODULE_PARM_DESC(radio_nr, "Radio Nr");
71
72/* USB timeout */
73static unsigned int usb_timeout = 500;
74module_param(usb_timeout, uint, 0644);
75MODULE_PARM_DESC(usb_timeout, "USB timeout (ms): *500*");
76
77/* RDS buffer blocks */
78static unsigned int rds_buf = 100;
79module_param(rds_buf, uint, 0444);
80MODULE_PARM_DESC(rds_buf, "RDS buffer entries: *100*");
81
82/* RDS maximum block errors */
83static unsigned short max_rds_errors = 1;
84/* 0 means 0 errors requiring correction */
85/* 1 means 1-2 errors requiring correction (used by original USBRadio.exe) */
86/* 2 means 3-5 errors requiring correction */
87/* 3 means 6+ errors or errors in checkword, correction not possible */
88module_param(max_rds_errors, ushort, 0644);
89MODULE_PARM_DESC(max_rds_errors, "RDS maximum block errors: *1*");
90
91
92
93/**************************************************************************
94 * USB HID Reports
95 **************************************************************************/
96
97/* Reports 1-16 give direct read/write access to the 16 Si470x registers */
98/* with the (REPORT_ID - 1) corresponding to the register address across USB */
99/* endpoint 0 using GET_REPORT and SET_REPORT */
100#define REGISTER_REPORT_SIZE (RADIO_REGISTER_SIZE + 1)
101#define REGISTER_REPORT(reg) ((reg) + 1)
102
103/* Report 17 gives direct read/write access to the entire Si470x register */
104/* map across endpoint 0 using GET_REPORT and SET_REPORT */
105#define ENTIRE_REPORT_SIZE (RADIO_REGISTER_NUM * RADIO_REGISTER_SIZE + 1)
106#define ENTIRE_REPORT 17
107
108/* Report 18 is used to send the lowest 6 Si470x registers up the HID */
109/* interrupt endpoint 1 to Windows every 20 milliseconds for status */
110#define RDS_REPORT_SIZE (RDS_REGISTER_NUM * RADIO_REGISTER_SIZE + 1)
111#define RDS_REPORT 18
112
113/* Report 19: LED state */
114#define LED_REPORT_SIZE 3
115#define LED_REPORT 19
116
117/* Report 19: stream */
118#define STREAM_REPORT_SIZE 3
119#define STREAM_REPORT 19
120
121/* Report 20: scratch */
122#define SCRATCH_PAGE_SIZE 63
123#define SCRATCH_REPORT_SIZE (SCRATCH_PAGE_SIZE + 1)
124#define SCRATCH_REPORT 20
125
126/* Reports 19-22: flash upgrade of the C8051F321 */
127#define WRITE_REPORT_SIZE 4
128#define WRITE_REPORT 19
129#define FLASH_REPORT_SIZE 64
130#define FLASH_REPORT 20
131#define CRC_REPORT_SIZE 3
132#define CRC_REPORT 21
133#define RESPONSE_REPORT_SIZE 2
134#define RESPONSE_REPORT 22
135
136/* Report 23: currently unused, but can accept 60 byte reports on the HID */
137/* interrupt out endpoint 2 every 1 millisecond */
138#define UNUSED_REPORT 23
139
140
141
142/**************************************************************************
9dcb79c2 143 * Software/Hardware Versions from Scratch Page
b09cd163 144 **************************************************************************/
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
369/**************************************************************************
370 * RDS Driver Functions
371 **************************************************************************/
372
373/*
374 * si470x_int_in_callback - rds callback and processing function
375 *
376 * TODO: do we need to use mutex locks in some sections?
377 */
378static void si470x_int_in_callback(struct urb *urb)
379{
380 struct si470x_device *radio = urb->context;
b09cd163
JS		 381 int retval;
382 unsigned char regnr;
383 unsigned char blocknum;
384 unsigned short bler; /* rds block errors */
385 unsigned short rds;
386 unsigned char tmpbuf[3];
387
388 if (urb->status) {
389 if (urb->status == -ENOENT ||
390 urb->status == -ECONNRESET ||
391 urb->status == -ESHUTDOWN) {
392 return;
393 } else {
a9d6fd5e
JS		 394 dev_warn(&radio->intf->dev,
395 "non-zero urb status (%d)\n", urb->status);
b09cd163
JS		 396 goto resubmit; /* Maybe we can recover. */
397 }
398 }
399
86ef3f78
HG		 400 /* Sometimes the device returns len 0 packets */
401 if (urb->actual_length != RDS_REPORT_SIZE)
b09cd163
JS		 402 goto resubmit;
403
86ef3f78
HG		 404 radio->registers[STATUSRSSI] =
405 get_unaligned_be16(&radio->int_in_buffer[1]);
406
77947111
HG		 407 if (radio->registers[STATUSRSSI] & STATUSRSSI_STC)
408 complete(&radio->completion);
409
86ef3f78 410 if ((radio->registers[SYSCONFIG1] & SYSCONFIG1_RDS)) {
b09cd163 411 /* Update RDS registers with URB data */
86ef3f78 412 for (regnr = 1; regnr < RDS_REGISTER_NUM; regnr++)
b09cd163
JS		 413 radio->registers[STATUSRSSI + regnr] =
414 get_unaligned_be16(&radio->int_in_buffer[
415 regnr * RADIO_REGISTER_SIZE + 1]);
416 /* get rds blocks */
417 if ((radio->registers[STATUSRSSI] & STATUSRSSI_RDSR) == 0) {
418 /* No RDS group ready, better luck next time */
419 goto resubmit;
420 }
421 if ((radio->registers[STATUSRSSI] & STATUSRSSI_RDSS) == 0) {
422 /* RDS decoder not synchronized */
423 goto resubmit;
424 }
425 for (blocknum = 0; blocknum < 4; blocknum++) {
426 switch (blocknum) {
427 default:
428 bler = (radio->registers[STATUSRSSI] &
429 STATUSRSSI_BLERA) >> 9;
430 rds = radio->registers[RDSA];
431 break;
432 case 1:
433 bler = (radio->registers[READCHAN] &
434 READCHAN_BLERB) >> 14;
435 rds = radio->registers[RDSB];
436 break;
437 case 2:
438 bler = (radio->registers[READCHAN] &
439 READCHAN_BLERC) >> 12;
440 rds = radio->registers[RDSC];
441 break;
442 case 3:
443 bler = (radio->registers[READCHAN] &
444 READCHAN_BLERD) >> 10;
445 rds = radio->registers[RDSD];
446 break;
c2c1b415 447 }
b09cd163
JS		 448
449 /* Fill the V4L2 RDS buffer */
450 put_unaligned_le16(rds, &tmpbuf);
451 tmpbuf[2] = blocknum; /* offset name */
452 tmpbuf[2] |= blocknum << 3; /* received offset */
453 if (bler > max_rds_errors)
454 tmpbuf[2] |= 0x80; /* uncorrectable errors */
455 else if (bler > 0)
456 tmpbuf[2] |= 0x40; /* corrected error(s) */
457
458 /* copy RDS block to internal buffer */
459 memcpy(&radio->buffer[radio->wr_index], &tmpbuf, 3);
460 radio->wr_index += 3;
461
462 /* wrap write pointer */
463 if (radio->wr_index >= radio->buf_size)
464 radio->wr_index = 0;
465
466 /* check for overflow */
467 if (radio->wr_index == radio->rd_index) {
468 /* increment and wrap read pointer */
469 radio->rd_index += 3;
470 if (radio->rd_index >= radio->buf_size)
471 radio->rd_index = 0;
472 }
473 }
474 if (radio->wr_index != radio->rd_index)
475 wake_up_interruptible(&radio->read_queue);
476 }
477
478resubmit:
479 /* Resubmit if we're still running. */
480 if (radio->int_in_running && radio->usbdev) {
481 retval = usb_submit_urb(radio->int_in_urb, GFP_ATOMIC);
482 if (retval) {
a9d6fd5e
JS		 483 dev_warn(&radio->intf->dev,
484 "resubmitting urb failed (%d)", retval);
b09cd163
JS		 485 radio->int_in_running = 0;
486 }
487 }
86ef3f78 488 radio->status_rssi_auto_update = radio->int_in_running;
b09cd163
JS		 489}
490
491
1aa925c9 492int si470x_fops_open(struct file *file)
b09cd163 493{
6fd522a6 494 return v4l2_fh_open(file);
b09cd163
JS		 495}
496
1aa925c9 497int si470x_fops_release(struct file *file)
b09cd163 498{
4967d53d 499 return v4l2_fh_release(file);
b09cd163
JS		 500}
501
6fd522a6 502static void si470x_usb_release(struct v4l2_device *v4l2_dev)
4967d53d 503{
6fd522a6
HV		 504 struct si470x_device *radio =
505 container_of(v4l2_dev, struct si470x_device, v4l2_dev);
4967d53d
HV		 506
507 usb_free_urb(radio->int_in_urb);
508 v4l2_ctrl_handler_free(&radio->hdl);
509 v4l2_device_unregister(&radio->v4l2_dev);
510 kfree(radio->int_in_buffer);
511 kfree(radio->buffer);
512 kfree(radio);
513}
b09cd163 514
b09cd163
JS		 515
516/**************************************************************************
517 * Video4Linux Interface
518 **************************************************************************/
519
520/*
521 * si470x_vidioc_querycap - query device capabilities
522 */
523int si470x_vidioc_querycap(struct file *file, void *priv,
524 struct v4l2_capability *capability)
525{
526 struct si470x_device *radio = video_drvdata(file);
527
528 strlcpy(capability->driver, DRIVER_NAME, sizeof(capability->driver));
529 strlcpy(capability->card, DRIVER_CARD, sizeof(capability->card));
530 usb_make_path(radio->usbdev, capability->bus_info,
531 sizeof(capability->bus_info));
32737810 532 capability->device_caps = V4L2_CAP_HW_FREQ_SEEK | V4L2_CAP_READWRITE |
b09cd163 533 V4L2_CAP_TUNER | V4L2_CAP_RADIO | V4L2_CAP_RDS_CAPTURE;
4967d53d 534 capability->capabilities = capability->device_caps | V4L2_CAP_DEVICE_CAPS;
b09cd163
JS		 535 return 0;
536}
537
538
6fd522a6
HV		 539static int si470x_start_usb(struct si470x_device *radio)
540{
541 int retval;
542
6fd522a6
HV		 543 /* initialize interrupt urb */
544 usb_fill_int_urb(radio->int_in_urb, radio->usbdev,
545 usb_rcvintpipe(radio->usbdev,
546 radio->int_in_endpoint->bEndpointAddress),
547 radio->int_in_buffer,
548 le16_to_cpu(radio->int_in_endpoint->wMaxPacketSize),
549 si470x_int_in_callback,
550 radio,
551 radio->int_in_endpoint->bInterval);
552
553 radio->int_in_running = 1;
554 mb();
555
556 retval = usb_submit_urb(radio->int_in_urb, GFP_KERNEL);
557 if (retval) {
558 dev_info(&radio->intf->dev,
559 "submitting int urb failed (%d)\n", retval);
560 radio->int_in_running = 0;
561 }
86ef3f78 562 radio->status_rssi_auto_update = radio->int_in_running;
77947111
HG		 563
564 /* start radio */
565 retval = si470x_start(radio);
566 if (retval < 0)
567 return retval;
568
569 v4l2_ctrl_handler_setup(&radio->hdl);
570
6fd522a6
HV		 571 return retval;
572}
b09cd163
JS		 573
574/**************************************************************************
575 * USB Interface
576 **************************************************************************/
577
578/*
579 * si470x_usb_driver_probe - probe for the device
580 */
581static int si470x_usb_driver_probe(struct usb_interface *intf,
582 const struct usb_device_id *id)
583{
584 struct si470x_device *radio;
585 struct usb_host_interface *iface_desc;
586 struct usb_endpoint_descriptor *endpoint;
587 int i, int_end_size, retval = 0;
9dcb79c2 588 unsigned char version_warning = 0;
b09cd163
JS		 589
590 /* private data allocation and initialization */
591 radio = kzalloc(sizeof(struct si470x_device), GFP_KERNEL);
592 if (!radio) {
593 retval = -ENOMEM;
594 goto err_initial;
595 }
b09cd163
JS		 596 radio->usbdev = interface_to_usbdev(intf);
597 radio->intf = intf;
f140612d 598 radio->band = 1; /* Default to 76 - 108 MHz */
b09cd163 599 mutex_init(&radio->lock);
77947111 600 init_completion(&radio->completion);
b09cd163
JS		 601
602 iface_desc = intf->cur_altsetting;
603
604 /* Set up interrupt endpoint information. */
605 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
606 endpoint = &iface_desc->endpoint[i].desc;
607 if (((endpoint->bEndpointAddress & USB_ENDPOINT_DIR_MASK) ==
608 USB_DIR_IN) && ((endpoint->bmAttributes &
609 USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_INT))
610 radio->int_in_endpoint = endpoint;
611 }
612 if (!radio->int_in_endpoint) {
a9d6fd5e 613 dev_info(&intf->dev, "could not find interrupt in endpoint\n");
b09cd163
JS		 614 retval = -EIO;
615 goto err_radio;
616 }
617
618 int_end_size = le16_to_cpu(radio->int_in_endpoint->wMaxPacketSize);
619
620 radio->int_in_buffer = kmalloc(int_end_size, GFP_KERNEL);
621 if (!radio->int_in_buffer) {
a9d6fd5e 622 dev_info(&intf->dev, "could not allocate int_in_buffer");
b09cd163
JS		 623 retval = -ENOMEM;
624 goto err_radio;
625 }
626
627 radio->int_in_urb = usb_alloc_urb(0, GFP_KERNEL);
628 if (!radio->int_in_urb) {
a9d6fd5e 629 dev_info(&intf->dev, "could not allocate int_in_urb");
b09cd163
JS		 630 retval = -ENOMEM;
631 goto err_intbuffer;
632 }
633
6fd522a6 634 radio->v4l2_dev.release = si470x_usb_release;
4967d53d
HV		 635 retval = v4l2_device_register(&intf->dev, &radio->v4l2_dev);
636 if (retval < 0) {
637 dev_err(&intf->dev, "couldn't register v4l2_device\n");
f54ba7f1 638 goto err_urb;
b09cd163 639 }
4967d53d
HV		 640
641 v4l2_ctrl_handler_init(&radio->hdl, 2);
642 v4l2_ctrl_new_std(&radio->hdl, &si470x_ctrl_ops,
643 V4L2_CID_AUDIO_MUTE, 0, 1, 1, 1);
644 v4l2_ctrl_new_std(&radio->hdl, &si470x_ctrl_ops,
645 V4L2_CID_AUDIO_VOLUME, 0, 15, 1, 15);
646 if (radio->hdl.error) {
647 retval = radio->hdl.error;
648 dev_err(&intf->dev, "couldn't register control\n");
649 goto err_dev;
650 }
651 radio->videodev = si470x_viddev_template;
652 radio->videodev.ctrl_handler = &radio->hdl;
653 radio->videodev.lock = &radio->lock;
654 radio->videodev.v4l2_dev = &radio->v4l2_dev;
6fd522a6 655 radio->videodev.release = video_device_release_empty;
4967d53d
HV		 656 set_bit(V4L2_FL_USE_FH_PRIO, &radio->videodev.flags);
657 video_set_drvdata(&radio->videodev, radio);
b09cd163 658
9dcb79c2 659 /* get device and chip versions */
b09cd163
JS		 660 if (si470x_get_all_registers(radio) < 0) {
661 retval = -EIO;
4967d53d 662 goto err_ctrl;
b09cd163 663 }
a9d6fd5e 664 dev_info(&intf->dev, "DeviceID=0x%4.4hx ChipID=0x%4.4hx\n",
b09cd163 665 radio->registers[DEVICEID], radio->registers[CHIPID]);
9dcb79c2
TL		 666 if ((radio->registers[CHIPID] & CHIPID_FIRMWARE) < RADIO_FW_VERSION) {
667 dev_warn(&intf->dev,
668 "This driver is known to work with "
669 "firmware version %hu,\n", RADIO_FW_VERSION);
670 dev_warn(&intf->dev,
671 "but the device has firmware version %hu.\n",
672 radio->registers[CHIPID] & CHIPID_FIRMWARE);
673 version_warning = 1;
674 }
b09cd163
JS		 675
676 /* get software and hardware versions */
677 if (si470x_get_scratch_page_versions(radio) < 0) {
678 retval = -EIO;
4967d53d 679 goto err_ctrl;
b09cd163 680 }
a9d6fd5e 681 dev_info(&intf->dev, "software version %d, hardware version %d\n",
b09cd163 682 radio->software_version, radio->hardware_version);
9dcb79c2
TL		 683 if (radio->hardware_version < RADIO_HW_VERSION) {
684 dev_warn(&intf->dev,
685 "This driver is known to work with "
686 "hardware version %hu,\n", RADIO_HW_VERSION);
687 dev_warn(&intf->dev,
688 "but the device has hardware version %hu.\n",
689 radio->hardware_version);
690 version_warning = 1;
691 }
692
693 /* give out version warning */
694 if (version_warning == 1) {
a9d6fd5e
JS		 695 dev_warn(&intf->dev,
696 "If you have some trouble using this driver,\n");
697 dev_warn(&intf->dev,
698 "please report to V4L ML at "
b09cd163
JS		 699 "linux-media@vger.kernel.org\n");
700 }
701
b09cd163
JS		 702 /* set led to connect state */
703 si470x_set_led_state(radio, BLINK_GREEN_LED);
704
705 /* rds buffer allocation */
706 radio->buf_size = rds_buf * 3;
707 radio->buffer = kmalloc(radio->buf_size, GFP_KERNEL);
708 if (!radio->buffer) {
709 retval = -EIO;
4967d53d 710 goto err_ctrl;
b09cd163
JS		 711 }
712
713 /* rds buffer configuration */
714 radio->wr_index = 0;
715 radio->rd_index = 0;
716 init_waitqueue_head(&radio->read_queue);
4967d53d 717 usb_set_intfdata(intf, radio);
b09cd163 718
6fd522a6
HV		 719 /* start radio */
720 retval = si470x_start_usb(radio);
721 if (retval < 0)
722 goto err_all;
723
77947111
HG		 724 /* set initial frequency */
725 si470x_set_freq(radio, 87.5 * FREQ_MUL); /* available in all regions */
726
b09cd163 727 /* register video device */
4967d53d 728 retval = video_register_device(&radio->videodev, VFL_TYPE_RADIO,
b09cd163
JS		 729 radio_nr);
730 if (retval) {
6fd522a6 731 dev_err(&intf->dev, "Could not register video device\n");
b09cd163
JS		 732 goto err_all;
733 }
b09cd163
JS		 734
735 return 0;
736err_all:
737 kfree(radio->buffer);
4967d53d
HV		 738err_ctrl:
739 v4l2_ctrl_handler_free(&radio->hdl);
740err_dev:
741 v4l2_device_unregister(&radio->v4l2_dev);
f54ba7f1
AK		 742err_urb:
743 usb_free_urb(radio->int_in_urb);
b09cd163
JS		 744err_intbuffer:
745 kfree(radio->int_in_buffer);
746err_radio:
747 kfree(radio);
748err_initial:
749 return retval;
750}
751
752
753/*
754 * si470x_usb_driver_suspend - suspend the device
755 */
756static int si470x_usb_driver_suspend(struct usb_interface *intf,
757 pm_message_t message)
758{
6fd522a6
HV		 759 struct si470x_device *radio = usb_get_intfdata(intf);
760
a9d6fd5e 761 dev_info(&intf->dev, "suspending now...\n");
b09cd163 762
6fd522a6
HV		 763 /* shutdown interrupt handler */
764 if (radio->int_in_running) {
765 radio->int_in_running = 0;
766 if (radio->int_in_urb)
767 usb_kill_urb(radio->int_in_urb);
768 }
769
770 /* cancel read processes */
771 wake_up_interruptible(&radio->read_queue);
772
773 /* stop radio */
774 si470x_stop(radio);
b09cd163
JS		 775 return 0;
776}
777
778
779/*
780 * si470x_usb_driver_resume - resume the device
781 */
782static int si470x_usb_driver_resume(struct usb_interface *intf)
783{
6fd522a6 784 struct si470x_device *radio = usb_get_intfdata(intf);
c1af23c4 785 int ret;
6fd522a6 786
a9d6fd5e 787 dev_info(&intf->dev, "resuming now...\n");
b09cd163 788
6fd522a6 789 /* start radio */
c1af23c4
HG		 790 ret = si470x_start_usb(radio);
791 if (ret == 0)
792 v4l2_ctrl_handler_setup(&radio->hdl);
793
794 return ret;
b09cd163
JS		 795}
796
797
798/*
799 * si470x_usb_driver_disconnect - disconnect the device
800 */
801static void si470x_usb_driver_disconnect(struct usb_interface *intf)
802{
803 struct si470x_device *radio = usb_get_intfdata(intf);
804
cf9b475d 805 mutex_lock(&radio->lock);
4967d53d
HV		 806 v4l2_device_disconnect(&radio->v4l2_dev);
807 video_unregister_device(&radio->videodev);
b09cd163 808 usb_set_intfdata(intf, NULL);
4967d53d 809 mutex_unlock(&radio->lock);
6fd522a6 810 v4l2_device_put(&radio->v4l2_dev);
b09cd163
JS		 811}
812
813
814/*
815 * si470x_usb_driver - usb driver interface
6fd522a6
HV		 816 *
817 * A note on suspend/resume: this driver had only empty suspend/resume
818 * functions, and when I tried to test suspend/resume it always disconnected
819 * instead of resuming (using my ADS InstantFM stick). So I've decided to
820 * remove these callbacks until someone else with better hardware can
821 * implement and test this.
b09cd163
JS		 822 */
823static struct usb_driver si470x_usb_driver = {
824 .name = DRIVER_NAME,
825 .probe = si470x_usb_driver_probe,
826 .disconnect = si470x_usb_driver_disconnect,
827 .suspend = si470x_usb_driver_suspend,
828 .resume = si470x_usb_driver_resume,
6fd522a6 829 .reset_resume = si470x_usb_driver_resume,
b09cd163 830 .id_table = si470x_usb_driver_id_table,
b09cd163
JS		 831};
832
ecb3b2b3 833module_usb_driver(si470x_usb_driver);
b09cd163
JS		 834
835MODULE_LICENSE("GPL");
836MODULE_AUTHOR(DRIVER_AUTHOR);
837MODULE_DESCRIPTION(DRIVER_DESC);
838MODULE_VERSION(DRIVER_VERSION);
Linux 6.x block layer and io_uring tree(s)