projects / linux-2.6-block.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
[media] radio-si470x: Fix band selection
[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
JS		 144 **************************************************************************/
145#define RADIO_SW_VERSION_NOT_BOOTLOADABLE 6
d9264a0b 146#define RADIO_SW_VERSION 1
b09cd163
JS		 147#define RADIO_HW_VERSION 1
148
b09cd163
JS		 149
150
151/**************************************************************************
152 * LED State Definitions
153 **************************************************************************/
154#define LED_COMMAND 0x35
155
156#define NO_CHANGE_LED 0x00
157#define ALL_COLOR_LED 0x01 /* streaming state */
158#define BLINK_GREEN_LED 0x02 /* connect state */
159#define BLINK_RED_LED 0x04
160#define BLINK_ORANGE_LED 0x10 /* disconnect state */
161#define SOLID_GREEN_LED 0x20 /* tuning/seeking state */
162#define SOLID_RED_LED 0x40 /* bootload state */
163#define SOLID_ORANGE_LED 0x80
164
165
166
167/**************************************************************************
168 * Stream State Definitions
169 **************************************************************************/
170#define STREAM_COMMAND 0x36
171#define STREAM_VIDPID 0x00
172#define STREAM_AUDIO 0xff
173
174
175
176/**************************************************************************
177 * Bootloader / Flash Commands
178 **************************************************************************/
179
180/* unique id sent to bootloader and required to put into a bootload state */
181#define UNIQUE_BL_ID 0x34
182
183/* mask for the flash data */
184#define FLASH_DATA_MASK 0x55
185
186/* bootloader commands */
187#define GET_SW_VERSION_COMMAND 0x00
188#define SET_PAGE_COMMAND 0x01
189#define ERASE_PAGE_COMMAND 0x02
190#define WRITE_PAGE_COMMAND 0x03
191#define CRC_ON_PAGE_COMMAND 0x04
192#define READ_FLASH_BYTE_COMMAND 0x05
193#define RESET_DEVICE_COMMAND 0x06
194#define GET_HW_VERSION_COMMAND 0x07
195#define BLANK 0xff
196
197/* bootloader command responses */
198#define COMMAND_OK 0x01
199#define COMMAND_FAILED 0x02
200#define COMMAND_PENDING 0x03
201
202
203
204/**************************************************************************
205 * General Driver Functions - REGISTER_REPORTs
206 **************************************************************************/
207
208/*
209 * si470x_get_report - receive a HID report
210 */
211static int si470x_get_report(struct si470x_device *radio, void *buf, int size)
212{
213 unsigned char *report = (unsigned char *) buf;
214 int retval;
215
216 retval = usb_control_msg(radio->usbdev,
217 usb_rcvctrlpipe(radio->usbdev, 0),
218 HID_REQ_GET_REPORT,
219 USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,
220 report[0], 2,
221 buf, size, usb_timeout);
222
223 if (retval < 0)
a9d6fd5e
JS		 224 dev_warn(&radio->intf->dev,
225 "si470x_get_report: usb_control_msg returned %d\n",
b09cd163
JS		 226 retval);
227 return retval;
228}
229
230
231/*
232 * si470x_set_report - send a HID report
233 */
234static int si470x_set_report(struct si470x_device *radio, void *buf, int size)
235{
236 unsigned char *report = (unsigned char *) buf;
237 int retval;
238
239 retval = usb_control_msg(radio->usbdev,
240 usb_sndctrlpipe(radio->usbdev, 0),
241 HID_REQ_SET_REPORT,
242 USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_OUT,
243 report[0], 2,
244 buf, size, usb_timeout);
245
246 if (retval < 0)
a9d6fd5e
JS		 247 dev_warn(&radio->intf->dev,
248 "si470x_set_report: usb_control_msg returned %d\n",
b09cd163
JS		 249 retval);
250 return retval;
251}
252
253
254/*
255 * si470x_get_register - read register
256 */
257int si470x_get_register(struct si470x_device *radio, int regnr)
258{
259 unsigned char buf[REGISTER_REPORT_SIZE];
260 int retval;
261
262 buf[0] = REGISTER_REPORT(regnr);
263
264 retval = si470x_get_report(radio, (void *) &buf, sizeof(buf));
265
266 if (retval >= 0)
267 radio->registers[regnr] = get_unaligned_be16(&buf[1]);
268
269 return (retval < 0) ? -EINVAL : 0;
270}
271
272
273/*
274 * si470x_set_register - write register
275 */
276int si470x_set_register(struct si470x_device *radio, int regnr)
277{
278 unsigned char buf[REGISTER_REPORT_SIZE];
279 int retval;
280
281 buf[0] = REGISTER_REPORT(regnr);
282 put_unaligned_be16(radio->registers[regnr], &buf[1]);
283
284 retval = si470x_set_report(radio, (void *) &buf, sizeof(buf));
285
286 return (retval < 0) ? -EINVAL : 0;
287}
288
289
290
291/**************************************************************************
292 * General Driver Functions - ENTIRE_REPORT
293 **************************************************************************/
294
295/*
296 * si470x_get_all_registers - read entire registers
297 */
298static int si470x_get_all_registers(struct si470x_device *radio)
299{
300 unsigned char buf[ENTIRE_REPORT_SIZE];
301 int retval;
302 unsigned char regnr;
303
304 buf[0] = ENTIRE_REPORT;
305
306 retval = si470x_get_report(radio, (void *) &buf, sizeof(buf));
307
308 if (retval >= 0)
309 for (regnr = 0; regnr < RADIO_REGISTER_NUM; regnr++)
310 radio->registers[regnr] = get_unaligned_be16(
311 &buf[regnr * RADIO_REGISTER_SIZE + 1]);
312
313 return (retval < 0) ? -EINVAL : 0;
314}
315
316
317
318/**************************************************************************
319 * General Driver Functions - LED_REPORT
320 **************************************************************************/
321
322/*
323 * si470x_set_led_state - sets the led state
324 */
325static int si470x_set_led_state(struct si470x_device *radio,
326 unsigned char led_state)
327{
328 unsigned char buf[LED_REPORT_SIZE];
329 int retval;
330
331 buf[0] = LED_REPORT;
332 buf[1] = LED_COMMAND;
333 buf[2] = led_state;
334
335 retval = si470x_set_report(radio, (void *) &buf, sizeof(buf));
336
337 return (retval < 0) ? -EINVAL : 0;
338}
339
340
341
342/**************************************************************************
343 * General Driver Functions - SCRATCH_REPORT
344 **************************************************************************/
345
346/*
347 * si470x_get_scratch_versions - gets the scratch page and version infos
348 */
349static int si470x_get_scratch_page_versions(struct si470x_device *radio)
350{
351 unsigned char buf[SCRATCH_REPORT_SIZE];
352 int retval;
353
354 buf[0] = SCRATCH_REPORT;
355
356 retval = si470x_get_report(radio, (void *) &buf, sizeof(buf));
357
358 if (retval < 0)
a9d6fd5e 359 dev_warn(&radio->intf->dev, "si470x_get_scratch: "
b09cd163
JS		 360 "si470x_get_report returned %d\n", retval);
361 else {
362 radio->software_version = buf[1];
363 radio->hardware_version = buf[2];
364 }
365
366 return (retval < 0) ? -EINVAL : 0;
367}
368
369
370
371/**************************************************************************
372 * RDS Driver Functions
373 **************************************************************************/
374
375/*
376 * si470x_int_in_callback - rds callback and processing function
377 *
378 * TODO: do we need to use mutex locks in some sections?
379 */
380static void si470x_int_in_callback(struct urb *urb)
381{
382 struct si470x_device *radio = urb->context;
b09cd163
JS		 383 int retval;
384 unsigned char regnr;
385 unsigned char blocknum;
386 unsigned short bler; /* rds block errors */
387 unsigned short rds;
388 unsigned char tmpbuf[3];
389
390 if (urb->status) {
391 if (urb->status == -ENOENT ||
392 urb->status == -ECONNRESET ||
393 urb->status == -ESHUTDOWN) {
394 return;
395 } else {
a9d6fd5e
JS		 396 dev_warn(&radio->intf->dev,
397 "non-zero urb status (%d)\n", urb->status);
b09cd163
JS		 398 goto resubmit; /* Maybe we can recover. */
399 }
400 }
401
86ef3f78
HG		 402 /* Sometimes the device returns len 0 packets */
403 if (urb->actual_length != RDS_REPORT_SIZE)
b09cd163
JS		 404 goto resubmit;
405
86ef3f78
HG		 406 radio->registers[STATUSRSSI] =
407 get_unaligned_be16(&radio->int_in_buffer[1]);
408
77947111
HG		 409 if (radio->registers[STATUSRSSI] & STATUSRSSI_STC)
410 complete(&radio->completion);
411
86ef3f78 412 if ((radio->registers[SYSCONFIG1] & SYSCONFIG1_RDS)) {
b09cd163 413 /* Update RDS registers with URB data */
86ef3f78 414 for (regnr = 1; regnr < RDS_REGISTER_NUM; regnr++)
b09cd163
JS		 415 radio->registers[STATUSRSSI + regnr] =
416 get_unaligned_be16(&radio->int_in_buffer[
417 regnr * RADIO_REGISTER_SIZE + 1]);
418 /* get rds blocks */
419 if ((radio->registers[STATUSRSSI] & STATUSRSSI_RDSR) == 0) {
420 /* No RDS group ready, better luck next time */
421 goto resubmit;
422 }
423 if ((radio->registers[STATUSRSSI] & STATUSRSSI_RDSS) == 0) {
424 /* RDS decoder not synchronized */
425 goto resubmit;
426 }
427 for (blocknum = 0; blocknum < 4; blocknum++) {
428 switch (blocknum) {
429 default:
430 bler = (radio->registers[STATUSRSSI] &
431 STATUSRSSI_BLERA) >> 9;
432 rds = radio->registers[RDSA];
433 break;
434 case 1:
435 bler = (radio->registers[READCHAN] &
436 READCHAN_BLERB) >> 14;
437 rds = radio->registers[RDSB];
438 break;
439 case 2:
440 bler = (radio->registers[READCHAN] &
441 READCHAN_BLERC) >> 12;
442 rds = radio->registers[RDSC];
443 break;
444 case 3:
445 bler = (radio->registers[READCHAN] &
446 READCHAN_BLERD) >> 10;
447 rds = radio->registers[RDSD];
448 break;
449 };
450
451 /* Fill the V4L2 RDS buffer */
452 put_unaligned_le16(rds, &tmpbuf);
453 tmpbuf[2] = blocknum; /* offset name */
454 tmpbuf[2] |= blocknum << 3; /* received offset */
455 if (bler > max_rds_errors)
456 tmpbuf[2] |= 0x80; /* uncorrectable errors */
457 else if (bler > 0)
458 tmpbuf[2] |= 0x40; /* corrected error(s) */
459
460 /* copy RDS block to internal buffer */
461 memcpy(&radio->buffer[radio->wr_index], &tmpbuf, 3);
462 radio->wr_index += 3;
463
464 /* wrap write pointer */
465 if (radio->wr_index >= radio->buf_size)
466 radio->wr_index = 0;
467
468 /* check for overflow */
469 if (radio->wr_index == radio->rd_index) {
470 /* increment and wrap read pointer */
471 radio->rd_index += 3;
472 if (radio->rd_index >= radio->buf_size)
473 radio->rd_index = 0;
474 }
475 }
476 if (radio->wr_index != radio->rd_index)
477 wake_up_interruptible(&radio->read_queue);
478 }
479
480resubmit:
481 /* Resubmit if we're still running. */
482 if (radio->int_in_running && radio->usbdev) {
483 retval = usb_submit_urb(radio->int_in_urb, GFP_ATOMIC);
484 if (retval) {
a9d6fd5e
JS		 485 dev_warn(&radio->intf->dev,
486 "resubmitting urb failed (%d)", retval);
b09cd163
JS		 487 radio->int_in_running = 0;
488 }
489 }
86ef3f78 490 radio->status_rssi_auto_update = radio->int_in_running;
b09cd163
JS		 491}
492
493
1aa925c9 494int si470x_fops_open(struct file *file)
b09cd163 495{
6fd522a6 496 return v4l2_fh_open(file);
b09cd163
JS		 497}
498
1aa925c9 499int si470x_fops_release(struct file *file)
b09cd163 500{
4967d53d 501 return v4l2_fh_release(file);
b09cd163
JS		 502}
503
6fd522a6 504static void si470x_usb_release(struct v4l2_device *v4l2_dev)
4967d53d 505{
6fd522a6
HV		 506 struct si470x_device *radio =
507 container_of(v4l2_dev, struct si470x_device, v4l2_dev);
4967d53d
HV		 508
509 usb_free_urb(radio->int_in_urb);
510 v4l2_ctrl_handler_free(&radio->hdl);
511 v4l2_device_unregister(&radio->v4l2_dev);
512 kfree(radio->int_in_buffer);
513 kfree(radio->buffer);
514 kfree(radio);
515}
b09cd163 516
b09cd163
JS		 517
518/**************************************************************************
519 * Video4Linux Interface
520 **************************************************************************/
521
522/*
523 * si470x_vidioc_querycap - query device capabilities
524 */
525int si470x_vidioc_querycap(struct file *file, void *priv,
526 struct v4l2_capability *capability)
527{
528 struct si470x_device *radio = video_drvdata(file);
529
530 strlcpy(capability->driver, DRIVER_NAME, sizeof(capability->driver));
531 strlcpy(capability->card, DRIVER_CARD, sizeof(capability->card));
532 usb_make_path(radio->usbdev, capability->bus_info,
533 sizeof(capability->bus_info));
4967d53d 534 capability->device_caps = V4L2_CAP_HW_FREQ_SEEK |
b09cd163 535 V4L2_CAP_TUNER | V4L2_CAP_RADIO | V4L2_CAP_RDS_CAPTURE;
4967d53d 536 capability->capabilities = capability->device_caps | V4L2_CAP_DEVICE_CAPS;
b09cd163
JS		 537 return 0;
538}
539
540
6fd522a6
HV		 541static int si470x_start_usb(struct si470x_device *radio)
542{
543 int retval;
544
6fd522a6
HV		 545 /* initialize interrupt urb */
546 usb_fill_int_urb(radio->int_in_urb, radio->usbdev,
547 usb_rcvintpipe(radio->usbdev,
548 radio->int_in_endpoint->bEndpointAddress),
549 radio->int_in_buffer,
550 le16_to_cpu(radio->int_in_endpoint->wMaxPacketSize),
551 si470x_int_in_callback,
552 radio,
553 radio->int_in_endpoint->bInterval);
554
555 radio->int_in_running = 1;
556 mb();
557
558 retval = usb_submit_urb(radio->int_in_urb, GFP_KERNEL);
559 if (retval) {
560 dev_info(&radio->intf->dev,
561 "submitting int urb failed (%d)\n", retval);
562 radio->int_in_running = 0;
563 }
86ef3f78 564 radio->status_rssi_auto_update = radio->int_in_running;
77947111
HG		 565
566 /* start radio */
567 retval = si470x_start(radio);
568 if (retval < 0)
569 return retval;
570
571 v4l2_ctrl_handler_setup(&radio->hdl);
572
6fd522a6
HV		 573 return retval;
574}
b09cd163
JS		 575
576/**************************************************************************
577 * USB Interface
578 **************************************************************************/
579
580/*
581 * si470x_usb_driver_probe - probe for the device
582 */
583static int si470x_usb_driver_probe(struct usb_interface *intf,
584 const struct usb_device_id *id)
585{
586 struct si470x_device *radio;
587 struct usb_host_interface *iface_desc;
588 struct usb_endpoint_descriptor *endpoint;
589 int i, int_end_size, retval = 0;
9dcb79c2 590 unsigned char version_warning = 0;
b09cd163
JS		 591
592 /* private data allocation and initialization */
593 radio = kzalloc(sizeof(struct si470x_device), GFP_KERNEL);
594 if (!radio) {
595 retval = -ENOMEM;
596 goto err_initial;
597 }
b09cd163
JS		 598 radio->usbdev = interface_to_usbdev(intf);
599 radio->intf = intf;
b09cd163 600 mutex_init(&radio->lock);
77947111 601 init_completion(&radio->completion);
b09cd163
JS		 602
603 iface_desc = intf->cur_altsetting;
604
605 /* Set up interrupt endpoint information. */
606 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
607 endpoint = &iface_desc->endpoint[i].desc;
608 if (((endpoint->bEndpointAddress & USB_ENDPOINT_DIR_MASK) ==
609 USB_DIR_IN) && ((endpoint->bmAttributes &
610 USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_INT))
611 radio->int_in_endpoint = endpoint;
612 }
613 if (!radio->int_in_endpoint) {
a9d6fd5e 614 dev_info(&intf->dev, "could not find interrupt in endpoint\n");
b09cd163
JS		 615 retval = -EIO;
616 goto err_radio;
617 }
618
619 int_end_size = le16_to_cpu(radio->int_in_endpoint->wMaxPacketSize);
620
621 radio->int_in_buffer = kmalloc(int_end_size, GFP_KERNEL);
622 if (!radio->int_in_buffer) {
a9d6fd5e 623 dev_info(&intf->dev, "could not allocate int_in_buffer");
b09cd163
JS		 624 retval = -ENOMEM;
625 goto err_radio;
626 }
627
628 radio->int_in_urb = usb_alloc_urb(0, GFP_KERNEL);
629 if (!radio->int_in_urb) {
a9d6fd5e 630 dev_info(&intf->dev, "could not allocate int_in_urb");
b09cd163
JS		 631 retval = -ENOMEM;
632 goto err_intbuffer;
633 }
634
6fd522a6 635 radio->v4l2_dev.release = si470x_usb_release;
4967d53d
HV		 636 retval = v4l2_device_register(&intf->dev, &radio->v4l2_dev);
637 if (retval < 0) {
638 dev_err(&intf->dev, "couldn't register v4l2_device\n");
f54ba7f1 639 goto err_urb;
b09cd163 640 }
4967d53d
HV		 641
642 v4l2_ctrl_handler_init(&radio->hdl, 2);
643 v4l2_ctrl_new_std(&radio->hdl, &si470x_ctrl_ops,
644 V4L2_CID_AUDIO_MUTE, 0, 1, 1, 1);
645 v4l2_ctrl_new_std(&radio->hdl, &si470x_ctrl_ops,
646 V4L2_CID_AUDIO_VOLUME, 0, 15, 1, 15);
647 if (radio->hdl.error) {
648 retval = radio->hdl.error;
649 dev_err(&intf->dev, "couldn't register control\n");
650 goto err_dev;
651 }
652 radio->videodev = si470x_viddev_template;
653 radio->videodev.ctrl_handler = &radio->hdl;
654 radio->videodev.lock = &radio->lock;
655 radio->videodev.v4l2_dev = &radio->v4l2_dev;
6fd522a6 656 radio->videodev.release = video_device_release_empty;
4967d53d
HV		 657 set_bit(V4L2_FL_USE_FH_PRIO, &radio->videodev.flags);
658 video_set_drvdata(&radio->videodev, radio);
b09cd163 659
9dcb79c2 660 /* get device and chip versions */
b09cd163
JS		 661 if (si470x_get_all_registers(radio) < 0) {
662 retval = -EIO;
4967d53d 663 goto err_ctrl;
b09cd163 664 }
a9d6fd5e 665 dev_info(&intf->dev, "DeviceID=0x%4.4hx ChipID=0x%4.4hx\n",
b09cd163 666 radio->registers[DEVICEID], radio->registers[CHIPID]);
9dcb79c2
TL		 667 if ((radio->registers[CHIPID] & CHIPID_FIRMWARE) < RADIO_FW_VERSION) {
668 dev_warn(&intf->dev,
669 "This driver is known to work with "
670 "firmware version %hu,\n", RADIO_FW_VERSION);
671 dev_warn(&intf->dev,
672 "but the device has firmware version %hu.\n",
673 radio->registers[CHIPID] & CHIPID_FIRMWARE);
674 version_warning = 1;
675 }
b09cd163
JS		 676
677 /* get software and hardware versions */
678 if (si470x_get_scratch_page_versions(radio) < 0) {
679 retval = -EIO;
4967d53d 680 goto err_ctrl;
b09cd163 681 }
a9d6fd5e 682 dev_info(&intf->dev, "software version %d, hardware version %d\n",
b09cd163 683 radio->software_version, radio->hardware_version);
9dcb79c2 684 if (radio->software_version < RADIO_SW_VERSION) {
a9d6fd5e
JS		 685 dev_warn(&intf->dev,
686 "This driver is known to work with "
9dcb79c2 687 "software version %hu,\n", RADIO_SW_VERSION);
a9d6fd5e 688 dev_warn(&intf->dev,
9dcb79c2
TL		 689 "but the device has software version %hu.\n",
690 radio->software_version);
691 version_warning = 1;
692 }
693 if (radio->hardware_version < RADIO_HW_VERSION) {
694 dev_warn(&intf->dev,
695 "This driver is known to work with "
696 "hardware version %hu,\n", RADIO_HW_VERSION);
697 dev_warn(&intf->dev,
698 "but the device has hardware version %hu.\n",
699 radio->hardware_version);
700 version_warning = 1;
701 }
702
703 /* give out version warning */
704 if (version_warning == 1) {
a9d6fd5e
JS		 705 dev_warn(&intf->dev,
706 "If you have some trouble using this driver,\n");
707 dev_warn(&intf->dev,
708 "please report to V4L ML at "
b09cd163
JS		 709 "linux-media@vger.kernel.org\n");
710 }
711
b09cd163
JS		 712 /* set led to connect state */
713 si470x_set_led_state(radio, BLINK_GREEN_LED);
714
715 /* rds buffer allocation */
716 radio->buf_size = rds_buf * 3;
717 radio->buffer = kmalloc(radio->buf_size, GFP_KERNEL);
718 if (!radio->buffer) {
719 retval = -EIO;
4967d53d 720 goto err_ctrl;
b09cd163
JS		 721 }
722
723 /* rds buffer configuration */
724 radio->wr_index = 0;
725 radio->rd_index = 0;
726 init_waitqueue_head(&radio->read_queue);
4967d53d 727 usb_set_intfdata(intf, radio);
b09cd163 728
6fd522a6
HV		 729 /* start radio */
730 retval = si470x_start_usb(radio);
731 if (retval < 0)
732 goto err_all;
733
77947111
HG		 734 /* set initial frequency */
735 si470x_set_freq(radio, 87.5 * FREQ_MUL); /* available in all regions */
736
b09cd163 737 /* register video device */
4967d53d 738 retval = video_register_device(&radio->videodev, VFL_TYPE_RADIO,
b09cd163
JS		 739 radio_nr);
740 if (retval) {
6fd522a6 741 dev_err(&intf->dev, "Could not register video device\n");
b09cd163
JS		 742 goto err_all;
743 }
b09cd163
JS		 744
745 return 0;
746err_all:
747 kfree(radio->buffer);
4967d53d
HV		 748err_ctrl:
749 v4l2_ctrl_handler_free(&radio->hdl);
750err_dev:
751 v4l2_device_unregister(&radio->v4l2_dev);
f54ba7f1
AK		 752err_urb:
753 usb_free_urb(radio->int_in_urb);
b09cd163
JS		 754err_intbuffer:
755 kfree(radio->int_in_buffer);
756err_radio:
757 kfree(radio);
758err_initial:
759 return retval;
760}
761
762
763/*
764 * si470x_usb_driver_suspend - suspend the device
765 */
766static int si470x_usb_driver_suspend(struct usb_interface *intf,
767 pm_message_t message)
768{
6fd522a6
HV		 769 struct si470x_device *radio = usb_get_intfdata(intf);
770
a9d6fd5e 771 dev_info(&intf->dev, "suspending now...\n");
b09cd163 772
6fd522a6
HV		 773 /* shutdown interrupt handler */
774 if (radio->int_in_running) {
775 radio->int_in_running = 0;
776 if (radio->int_in_urb)
777 usb_kill_urb(radio->int_in_urb);
778 }
779
780 /* cancel read processes */
781 wake_up_interruptible(&radio->read_queue);
782
783 /* stop radio */
784 si470x_stop(radio);
b09cd163
JS		 785 return 0;
786}
787
788
789/*
790 * si470x_usb_driver_resume - resume the device
791 */
792static int si470x_usb_driver_resume(struct usb_interface *intf)
793{
6fd522a6 794 struct si470x_device *radio = usb_get_intfdata(intf);
c1af23c4 795 int ret;
6fd522a6 796
a9d6fd5e 797 dev_info(&intf->dev, "resuming now...\n");
b09cd163 798
6fd522a6 799 /* start radio */
c1af23c4
HG		 800 ret = si470x_start_usb(radio);
801 if (ret == 0)
802 v4l2_ctrl_handler_setup(&radio->hdl);
803
804 return ret;
b09cd163
JS		 805}
806
807
808/*
809 * si470x_usb_driver_disconnect - disconnect the device
810 */
811static void si470x_usb_driver_disconnect(struct usb_interface *intf)
812{
813 struct si470x_device *radio = usb_get_intfdata(intf);
814
cf9b475d 815 mutex_lock(&radio->lock);
4967d53d
HV		 816 v4l2_device_disconnect(&radio->v4l2_dev);
817 video_unregister_device(&radio->videodev);
b09cd163 818 usb_set_intfdata(intf, NULL);
4967d53d 819 mutex_unlock(&radio->lock);
6fd522a6 820 v4l2_device_put(&radio->v4l2_dev);
b09cd163
JS		 821}
822
823
824/*
825 * si470x_usb_driver - usb driver interface
6fd522a6
HV		 826 *
827 * A note on suspend/resume: this driver had only empty suspend/resume
828 * functions, and when I tried to test suspend/resume it always disconnected
829 * instead of resuming (using my ADS InstantFM stick). So I've decided to
830 * remove these callbacks until someone else with better hardware can
831 * implement and test this.
b09cd163
JS		 832 */
833static struct usb_driver si470x_usb_driver = {
834 .name = DRIVER_NAME,
835 .probe = si470x_usb_driver_probe,
836 .disconnect = si470x_usb_driver_disconnect,
837 .suspend = si470x_usb_driver_suspend,
838 .resume = si470x_usb_driver_resume,
6fd522a6 839 .reset_resume = si470x_usb_driver_resume,
b09cd163 840 .id_table = si470x_usb_driver_id_table,
b09cd163
JS		 841};
842
ecb3b2b3 843module_usb_driver(si470x_usb_driver);
b09cd163
JS		 844
845MODULE_LICENSE("GPL");
846MODULE_AUTHOR(DRIVER_AUTHOR);
847MODULE_DESCRIPTION(DRIVER_DESC);
848MODULE_VERSION(DRIVER_VERSION);
Linux 6.x block layer and io_uring tree(s)