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Merge tag 'imx-clk-common-fixes' of git://git.pengutronix.de/git/imx/linux-2.6 into...
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / media / radio / si470x / radio-si470x-usb.c
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_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>
39 #include <linux/slab.h>
40
41 #include "radio-si470x.h"
42
43
44 /* USB Device ID List */
45 static struct usb_device_id si470x_usb_driver_id_table[] = {
46 /* Silicon Labs USB FM Radio Reference Design */
47 { USB_DEVICE_AND_INTERFACE_INFO(0x10c4, 0x818a, USB_CLASS_HID, 0, 0) },
48 /* ADS/Tech FM Radio Receiver (formerly Instant FM Music) */
49 { USB_DEVICE_AND_INTERFACE_INFO(0x06e1, 0xa155, USB_CLASS_HID, 0, 0) },
50 /* KWorld USB FM Radio SnapMusic Mobile 700 (FM700) */
51 { USB_DEVICE_AND_INTERFACE_INFO(0x1b80, 0xd700, USB_CLASS_HID, 0, 0) },
52 /* Sanei Electric, Inc. FM USB Radio (sold as DealExtreme.com PCear) */
53 { USB_DEVICE_AND_INTERFACE_INFO(0x10c5, 0x819a, USB_CLASS_HID, 0, 0) },
54 /* Terminating entry */
55 { }
56 };
57 MODULE_DEVICE_TABLE(usb, si470x_usb_driver_id_table);
58
59
60
61 /**************************************************************************
62 * Module Parameters
63 **************************************************************************/
64
65 /* Radio Nr */
66 static int radio_nr = -1;
67 module_param(radio_nr, int, 0444);
68 MODULE_PARM_DESC(radio_nr, "Radio Nr");
69
70 /* USB timeout */
71 static unsigned int usb_timeout = 500;
72 module_param(usb_timeout, uint, 0644);
73 MODULE_PARM_DESC(usb_timeout, "USB timeout (ms): *500*");
74
75 /* RDS buffer blocks */
76 static unsigned int rds_buf = 100;
77 module_param(rds_buf, uint, 0444);
78 MODULE_PARM_DESC(rds_buf, "RDS buffer entries: *100*");
79
80 /* RDS maximum block errors */
81 static unsigned short max_rds_errors = 1;
82 /* 0 means 0 errors requiring correction */
83 /* 1 means 1-2 errors requiring correction (used by original USBRadio.exe) */
84 /* 2 means 3-5 errors requiring correction */
85 /* 3 means 6+ errors or errors in checkword, correction not possible */
86 module_param(max_rds_errors, ushort, 0644);
87 MODULE_PARM_DESC(max_rds_errors, "RDS maximum block errors: *1*");
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 /**************************************************************************
141 * Software/Hardware Versions from Scratch Page
142 **************************************************************************/
143 #define RADIO_SW_VERSION_NOT_BOOTLOADABLE 6
144 #define RADIO_SW_VERSION 7
145 #define RADIO_HW_VERSION 1
146
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 */
209 static 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)
222 dev_warn(&radio->intf->dev,
223 "si470x_get_report: usb_control_msg returned %d\n",
224 retval);
225 return retval;
226 }
227
228
229 /*
230 * si470x_set_report - send a HID report
231 */
232 static 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)
245 dev_warn(&radio->intf->dev,
246 "si470x_set_report: usb_control_msg returned %d\n",
247 retval);
248 return retval;
249 }
250
251
252 /*
253 * si470x_get_register - read register
254 */
255 int 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 */
274 int 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 */
296 static 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 */
323 static 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 */
347 static 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)
357 dev_warn(&radio->intf->dev, "si470x_get_scratch: "
358 "si470x_get_report returned %d\n", retval);
359 else {
360 radio->software_version = buf[1];
361 radio->hardware_version = buf[2];
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 */
378 static void si470x_int_in_callback(struct urb *urb)
379 {
380 struct si470x_device *radio = urb->context;
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 {
394 dev_warn(&radio->intf->dev,
395 "non-zero urb status (%d)\n", urb->status);
396 goto resubmit; /* Maybe we can recover. */
397 }
398 }
399
400 if ((radio->registers[SYSCONFIG1] & SYSCONFIG1_RDS) == 0)
401 goto resubmit;
402
403 if (urb->actual_length > 0) {
404 /* Update RDS registers with URB data */
405 for (regnr = 0; regnr < RDS_REGISTER_NUM; regnr++)
406 radio->registers[STATUSRSSI + regnr] =
407 get_unaligned_be16(&radio->int_in_buffer[
408 regnr * RADIO_REGISTER_SIZE + 1]);
409 /* get rds blocks */
410 if ((radio->registers[STATUSRSSI] & STATUSRSSI_RDSR) == 0) {
411 /* No RDS group ready, better luck next time */
412 goto resubmit;
413 }
414 if ((radio->registers[STATUSRSSI] & STATUSRSSI_RDSS) == 0) {
415 /* RDS decoder not synchronized */
416 goto resubmit;
417 }
418 for (blocknum = 0; blocknum < 4; blocknum++) {
419 switch (blocknum) {
420 default:
421 bler = (radio->registers[STATUSRSSI] &
422 STATUSRSSI_BLERA) >> 9;
423 rds = radio->registers[RDSA];
424 break;
425 case 1:
426 bler = (radio->registers[READCHAN] &
427 READCHAN_BLERB) >> 14;
428 rds = radio->registers[RDSB];
429 break;
430 case 2:
431 bler = (radio->registers[READCHAN] &
432 READCHAN_BLERC) >> 12;
433 rds = radio->registers[RDSC];
434 break;
435 case 3:
436 bler = (radio->registers[READCHAN] &
437 READCHAN_BLERD) >> 10;
438 rds = radio->registers[RDSD];
439 break;
440 };
441
442 /* Fill the V4L2 RDS buffer */
443 put_unaligned_le16(rds, &tmpbuf);
444 tmpbuf[2] = blocknum; /* offset name */
445 tmpbuf[2] |= blocknum << 3; /* received offset */
446 if (bler > max_rds_errors)
447 tmpbuf[2] |= 0x80; /* uncorrectable errors */
448 else if (bler > 0)
449 tmpbuf[2] |= 0x40; /* corrected error(s) */
450
451 /* copy RDS block to internal buffer */
452 memcpy(&radio->buffer[radio->wr_index], &tmpbuf, 3);
453 radio->wr_index += 3;
454
455 /* wrap write pointer */
456 if (radio->wr_index >= radio->buf_size)
457 radio->wr_index = 0;
458
459 /* check for overflow */
460 if (radio->wr_index == radio->rd_index) {
461 /* increment and wrap read pointer */
462 radio->rd_index += 3;
463 if (radio->rd_index >= radio->buf_size)
464 radio->rd_index = 0;
465 }
466 }
467 if (radio->wr_index != radio->rd_index)
468 wake_up_interruptible(&radio->read_queue);
469 }
470
471 resubmit:
472 /* Resubmit if we're still running. */
473 if (radio->int_in_running && radio->usbdev) {
474 retval = usb_submit_urb(radio->int_in_urb, GFP_ATOMIC);
475 if (retval) {
476 dev_warn(&radio->intf->dev,
477 "resubmitting urb failed (%d)", retval);
478 radio->int_in_running = 0;
479 }
480 }
481 }
482
483
484 int si470x_fops_open(struct file *file)
485 {
486 return v4l2_fh_open(file);
487 }
488
489 int si470x_fops_release(struct file *file)
490 {
491 return v4l2_fh_release(file);
492 }
493
494 static void si470x_usb_release(struct v4l2_device *v4l2_dev)
495 {
496 struct si470x_device *radio =
497 container_of(v4l2_dev, struct si470x_device, v4l2_dev);
498
499 usb_free_urb(radio->int_in_urb);
500 v4l2_ctrl_handler_free(&radio->hdl);
501 v4l2_device_unregister(&radio->v4l2_dev);
502 kfree(radio->int_in_buffer);
503 kfree(radio->buffer);
504 kfree(radio);
505 }
506
507
508 /**************************************************************************
509 * Video4Linux Interface
510 **************************************************************************/
511
512 /*
513 * si470x_vidioc_querycap - query device capabilities
514 */
515 int si470x_vidioc_querycap(struct file *file, void *priv,
516 struct v4l2_capability *capability)
517 {
518 struct si470x_device *radio = video_drvdata(file);
519
520 strlcpy(capability->driver, DRIVER_NAME, sizeof(capability->driver));
521 strlcpy(capability->card, DRIVER_CARD, sizeof(capability->card));
522 usb_make_path(radio->usbdev, capability->bus_info,
523 sizeof(capability->bus_info));
524 capability->device_caps = V4L2_CAP_HW_FREQ_SEEK |
525 V4L2_CAP_TUNER | V4L2_CAP_RADIO | V4L2_CAP_RDS_CAPTURE;
526 capability->capabilities = capability->device_caps | V4L2_CAP_DEVICE_CAPS;
527 return 0;
528 }
529
530
531 static int si470x_start_usb(struct si470x_device *radio)
532 {
533 int retval;
534
535 /* start radio */
536 retval = si470x_start(radio);
537 if (retval < 0)
538 return retval;
539
540 v4l2_ctrl_handler_setup(&radio->hdl);
541
542 /* initialize interrupt urb */
543 usb_fill_int_urb(radio->int_in_urb, radio->usbdev,
544 usb_rcvintpipe(radio->usbdev,
545 radio->int_in_endpoint->bEndpointAddress),
546 radio->int_in_buffer,
547 le16_to_cpu(radio->int_in_endpoint->wMaxPacketSize),
548 si470x_int_in_callback,
549 radio,
550 radio->int_in_endpoint->bInterval);
551
552 radio->int_in_running = 1;
553 mb();
554
555 retval = usb_submit_urb(radio->int_in_urb, GFP_KERNEL);
556 if (retval) {
557 dev_info(&radio->intf->dev,
558 "submitting int urb failed (%d)\n", retval);
559 radio->int_in_running = 0;
560 }
561 return retval;
562 }
563
564 /**************************************************************************
565 * USB Interface
566 **************************************************************************/
567
568 /*
569 * si470x_usb_driver_probe - probe for the device
570 */
571 static int si470x_usb_driver_probe(struct usb_interface *intf,
572 const struct usb_device_id *id)
573 {
574 struct si470x_device *radio;
575 struct usb_host_interface *iface_desc;
576 struct usb_endpoint_descriptor *endpoint;
577 int i, int_end_size, retval = 0;
578 unsigned char version_warning = 0;
579
580 /* private data allocation and initialization */
581 radio = kzalloc(sizeof(struct si470x_device), GFP_KERNEL);
582 if (!radio) {
583 retval = -ENOMEM;
584 goto err_initial;
585 }
586 radio->usbdev = interface_to_usbdev(intf);
587 radio->intf = intf;
588 mutex_init(&radio->lock);
589
590 iface_desc = intf->cur_altsetting;
591
592 /* Set up interrupt endpoint information. */
593 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
594 endpoint = &iface_desc->endpoint[i].desc;
595 if (((endpoint->bEndpointAddress & USB_ENDPOINT_DIR_MASK) ==
596 USB_DIR_IN) && ((endpoint->bmAttributes &
597 USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_INT))
598 radio->int_in_endpoint = endpoint;
599 }
600 if (!radio->int_in_endpoint) {
601 dev_info(&intf->dev, "could not find interrupt in endpoint\n");
602 retval = -EIO;
603 goto err_radio;
604 }
605
606 int_end_size = le16_to_cpu(radio->int_in_endpoint->wMaxPacketSize);
607
608 radio->int_in_buffer = kmalloc(int_end_size, GFP_KERNEL);
609 if (!radio->int_in_buffer) {
610 dev_info(&intf->dev, "could not allocate int_in_buffer");
611 retval = -ENOMEM;
612 goto err_radio;
613 }
614
615 radio->int_in_urb = usb_alloc_urb(0, GFP_KERNEL);
616 if (!radio->int_in_urb) {
617 dev_info(&intf->dev, "could not allocate int_in_urb");
618 retval = -ENOMEM;
619 goto err_intbuffer;
620 }
621
622 radio->v4l2_dev.release = si470x_usb_release;
623 retval = v4l2_device_register(&intf->dev, &radio->v4l2_dev);
624 if (retval < 0) {
625 dev_err(&intf->dev, "couldn't register v4l2_device\n");
626 goto err_urb;
627 }
628
629 v4l2_ctrl_handler_init(&radio->hdl, 2);
630 v4l2_ctrl_new_std(&radio->hdl, &si470x_ctrl_ops,
631 V4L2_CID_AUDIO_MUTE, 0, 1, 1, 1);
632 v4l2_ctrl_new_std(&radio->hdl, &si470x_ctrl_ops,
633 V4L2_CID_AUDIO_VOLUME, 0, 15, 1, 15);
634 if (radio->hdl.error) {
635 retval = radio->hdl.error;
636 dev_err(&intf->dev, "couldn't register control\n");
637 goto err_dev;
638 }
639 radio->videodev = si470x_viddev_template;
640 radio->videodev.ctrl_handler = &radio->hdl;
641 radio->videodev.lock = &radio->lock;
642 radio->videodev.v4l2_dev = &radio->v4l2_dev;
643 radio->videodev.release = video_device_release_empty;
644 set_bit(V4L2_FL_USE_FH_PRIO, &radio->videodev.flags);
645 video_set_drvdata(&radio->videodev, radio);
646
647 /* get device and chip versions */
648 if (si470x_get_all_registers(radio) < 0) {
649 retval = -EIO;
650 goto err_ctrl;
651 }
652 dev_info(&intf->dev, "DeviceID=0x%4.4hx ChipID=0x%4.4hx\n",
653 radio->registers[DEVICEID], radio->registers[CHIPID]);
654 if ((radio->registers[CHIPID] & CHIPID_FIRMWARE) < RADIO_FW_VERSION) {
655 dev_warn(&intf->dev,
656 "This driver is known to work with "
657 "firmware version %hu,\n", RADIO_FW_VERSION);
658 dev_warn(&intf->dev,
659 "but the device has firmware version %hu.\n",
660 radio->registers[CHIPID] & CHIPID_FIRMWARE);
661 version_warning = 1;
662 }
663
664 /* get software and hardware versions */
665 if (si470x_get_scratch_page_versions(radio) < 0) {
666 retval = -EIO;
667 goto err_ctrl;
668 }
669 dev_info(&intf->dev, "software version %d, hardware version %d\n",
670 radio->software_version, radio->hardware_version);
671 if (radio->software_version < RADIO_SW_VERSION) {
672 dev_warn(&intf->dev,
673 "This driver is known to work with "
674 "software version %hu,\n", RADIO_SW_VERSION);
675 dev_warn(&intf->dev,
676 "but the device has software version %hu.\n",
677 radio->software_version);
678 version_warning = 1;
679 }
680 if (radio->hardware_version < RADIO_HW_VERSION) {
681 dev_warn(&intf->dev,
682 "This driver is known to work with "
683 "hardware version %hu,\n", RADIO_HW_VERSION);
684 dev_warn(&intf->dev,
685 "but the device has hardware version %hu.\n",
686 radio->hardware_version);
687 version_warning = 1;
688 }
689
690 /* give out version warning */
691 if (version_warning == 1) {
692 dev_warn(&intf->dev,
693 "If you have some trouble using this driver,\n");
694 dev_warn(&intf->dev,
695 "please report to V4L ML at "
696 "linux-media@vger.kernel.org\n");
697 }
698
699 /* set initial frequency */
700 si470x_set_freq(radio, 87.5 * FREQ_MUL); /* available in all regions */
701
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;
710 goto err_ctrl;
711 }
712
713 /* rds buffer configuration */
714 radio->wr_index = 0;
715 radio->rd_index = 0;
716 init_waitqueue_head(&radio->read_queue);
717 usb_set_intfdata(intf, radio);
718
719 /* start radio */
720 retval = si470x_start_usb(radio);
721 if (retval < 0)
722 goto err_all;
723
724 /* register video device */
725 retval = video_register_device(&radio->videodev, VFL_TYPE_RADIO,
726 radio_nr);
727 if (retval) {
728 dev_err(&intf->dev, "Could not register video device\n");
729 goto err_all;
730 }
731
732 return 0;
733 err_all:
734 kfree(radio->buffer);
735 err_ctrl:
736 v4l2_ctrl_handler_free(&radio->hdl);
737 err_dev:
738 v4l2_device_unregister(&radio->v4l2_dev);
739 err_urb:
740 usb_free_urb(radio->int_in_urb);
741 err_intbuffer:
742 kfree(radio->int_in_buffer);
743 err_radio:
744 kfree(radio);
745 err_initial:
746 return retval;
747 }
748
749
750 /*
751 * si470x_usb_driver_suspend - suspend the device
752 */
753 static int si470x_usb_driver_suspend(struct usb_interface *intf,
754 pm_message_t message)
755 {
756 struct si470x_device *radio = usb_get_intfdata(intf);
757
758 dev_info(&intf->dev, "suspending now...\n");
759
760 /* shutdown interrupt handler */
761 if (radio->int_in_running) {
762 radio->int_in_running = 0;
763 if (radio->int_in_urb)
764 usb_kill_urb(radio->int_in_urb);
765 }
766
767 /* cancel read processes */
768 wake_up_interruptible(&radio->read_queue);
769
770 /* stop radio */
771 si470x_stop(radio);
772 return 0;
773 }
774
775
776 /*
777 * si470x_usb_driver_resume - resume the device
778 */
779 static int si470x_usb_driver_resume(struct usb_interface *intf)
780 {
781 struct si470x_device *radio = usb_get_intfdata(intf);
782
783 dev_info(&intf->dev, "resuming now...\n");
784
785 /* start radio */
786 return si470x_start_usb(radio);
787 }
788
789
790 /*
791 * si470x_usb_driver_disconnect - disconnect the device
792 */
793 static void si470x_usb_driver_disconnect(struct usb_interface *intf)
794 {
795 struct si470x_device *radio = usb_get_intfdata(intf);
796
797 mutex_lock(&radio->lock);
798 v4l2_device_disconnect(&radio->v4l2_dev);
799 video_unregister_device(&radio->videodev);
800 usb_set_intfdata(intf, NULL);
801 mutex_unlock(&radio->lock);
802 v4l2_device_put(&radio->v4l2_dev);
803 }
804
805
806 /*
807 * si470x_usb_driver - usb driver interface
808 *
809 * A note on suspend/resume: this driver had only empty suspend/resume
810 * functions, and when I tried to test suspend/resume it always disconnected
811 * instead of resuming (using my ADS InstantFM stick). So I've decided to
812 * remove these callbacks until someone else with better hardware can
813 * implement and test this.
814 */
815 static struct usb_driver si470x_usb_driver = {
816 .name = DRIVER_NAME,
817 .probe = si470x_usb_driver_probe,
818 .disconnect = si470x_usb_driver_disconnect,
819 .suspend = si470x_usb_driver_suspend,
820 .resume = si470x_usb_driver_resume,
821 .reset_resume = si470x_usb_driver_resume,
822 .id_table = si470x_usb_driver_id_table,
823 };
824
825 module_usb_driver(si470x_usb_driver);
826
827 MODULE_LICENSE("GPL");
828 MODULE_AUTHOR(DRIVER_AUTHOR);
829 MODULE_DESCRIPTION(DRIVER_DESC);
830 MODULE_VERSION(DRIVER_VERSION);
kernel source for telekom puls (alcatel/mediatek)