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Merge branch 'kmemleak' of git://linux-arm.org/linux-2.6
[deliverable/linux.git] / drivers / media / radio / radio-si470x.c
1 /*
2 * drivers/media/radio/radio-si470x.c
3 *
4 * Driver for USB radios for the Silicon Labs Si470x FM Radio Receivers:
5 * - Silicon Labs USB FM Radio Reference Design
6 * - ADS/Tech FM Radio Receiver (formerly Instant FM Music) (RDX-155-EF)
7 * - KWorld USB FM Radio SnapMusic Mobile 700 (FM700)
8 * - Sanei Electric, Inc. FM USB Radio (sold as DealExtreme.com PCear)
9 *
10 * Copyright (c) 2009 Tobias Lorenz <tobias.lorenz@gmx.net>
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
16 *
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
21 *
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
25 */
26
27
28 /*
29 * History:
30 * 2008-01-12 Tobias Lorenz <tobias.lorenz@gmx.net>
31 * Version 1.0.0
32 * - First working version
33 * 2008-01-13 Tobias Lorenz <tobias.lorenz@gmx.net>
34 * Version 1.0.1
35 * - Improved error handling, every function now returns errno
36 * - Improved multi user access (start/mute/stop)
37 * - Channel doesn't get lost anymore after start/mute/stop
38 * - RDS support added (polling mode via interrupt EP 1)
39 * - marked default module parameters with *value*
40 * - switched from bit structs to bit masks
41 * - header file cleaned and integrated
42 * 2008-01-14 Tobias Lorenz <tobias.lorenz@gmx.net>
43 * Version 1.0.2
44 * - hex values are now lower case
45 * - commented USB ID for ADS/Tech moved on todo list
46 * - blacklisted si470x in hid-quirks.c
47 * - rds buffer handling functions integrated into *_work, *_read
48 * - rds_command in si470x_poll exchanged against simple retval
49 * - check for firmware version 15
50 * - code order and prototypes still remain the same
51 * - spacing and bottom of band codes remain the same
52 * 2008-01-16 Tobias Lorenz <tobias.lorenz@gmx.net>
53 * Version 1.0.3
54 * - code reordered to avoid function prototypes
55 * - switch/case defaults are now more user-friendly
56 * - unified comment style
57 * - applied all checkpatch.pl v1.12 suggestions
58 * except the warning about the too long lines with bit comments
59 * - renamed FMRADIO to RADIO to cut line length (checkpatch.pl)
60 * 2008-01-22 Tobias Lorenz <tobias.lorenz@gmx.net>
61 * Version 1.0.4
62 * - avoid poss. locking when doing copy_to_user which may sleep
63 * - RDS is automatically activated on read now
64 * - code cleaned of unnecessary rds_commands
65 * - USB Vendor/Product ID for ADS/Tech FM Radio Receiver verified
66 * (thanks to Guillaume RAMOUSSE)
67 * 2008-01-27 Tobias Lorenz <tobias.lorenz@gmx.net>
68 * Version 1.0.5
69 * - number of seek_retries changed to tune_timeout
70 * - fixed problem with incomplete tune operations by own buffers
71 * - optimization of variables and printf types
72 * - improved error logging
73 * 2008-01-31 Tobias Lorenz <tobias.lorenz@gmx.net>
74 * Oliver Neukum <oliver@neukum.org>
75 * Version 1.0.6
76 * - fixed coverity checker warnings in *_usb_driver_disconnect
77 * - probe()/open() race by correct ordering in probe()
78 * - DMA coherency rules by separate allocation of all buffers
79 * - use of endianness macros
80 * - abuse of spinlock, replaced by mutex
81 * - racy handling of timer in disconnect,
82 * replaced by delayed_work
83 * - racy interruptible_sleep_on(),
84 * replaced with wait_event_interruptible()
85 * - handle signals in read()
86 * 2008-02-08 Tobias Lorenz <tobias.lorenz@gmx.net>
87 * Oliver Neukum <oliver@neukum.org>
88 * Version 1.0.7
89 * - usb autosuspend support
90 * - unplugging fixed
91 * 2008-05-07 Tobias Lorenz <tobias.lorenz@gmx.net>
92 * Version 1.0.8
93 * - hardware frequency seek support
94 * - afc indication
95 * - more safety checks, let si470x_get_freq return errno
96 * - vidioc behavior corrected according to v4l2 spec
97 * 2008-10-20 Alexey Klimov <klimov.linux@gmail.com>
98 * - add support for KWorld USB FM Radio FM700
99 * - blacklisted KWorld radio in hid-core.c and hid-ids.h
100 * 2008-12-03 Mark Lord <mlord@pobox.com>
101 * - add support for DealExtreme USB Radio
102 * 2009-01-31 Bob Ross <pigiron@gmx.com>
103 * - correction of stereo detection/setting
104 * - correction of signal strength indicator scaling
105 * 2009-01-31 Rick Bronson <rick@efn.org>
106 * Tobias Lorenz <tobias.lorenz@gmx.net>
107 * - add LED status output
108 * - get HW/SW version from scratchpad
109 *
110 * ToDo:
111 * - add firmware download/update support
112 * - RDS support: interrupt mode, instead of polling
113 */
114
115
116 /* driver definitions */
117 #define DRIVER_AUTHOR "Tobias Lorenz <tobias.lorenz@gmx.net>"
118 #define DRIVER_NAME "radio-si470x"
119 #define DRIVER_KERNEL_VERSION KERNEL_VERSION(1, 0, 9)
120 #define DRIVER_CARD "Silicon Labs Si470x FM Radio Receiver"
121 #define DRIVER_DESC "USB radio driver for Si470x FM Radio Receivers"
122 #define DRIVER_VERSION "1.0.9"
123
124
125 /* kernel includes */
126 #include <linux/kernel.h>
127 #include <linux/module.h>
128 #include <linux/init.h>
129 #include <linux/slab.h>
130 #include <linux/smp_lock.h>
131 #include <linux/input.h>
132 #include <linux/usb.h>
133 #include <linux/hid.h>
134 #include <linux/version.h>
135 #include <linux/videodev2.h>
136 #include <linux/mutex.h>
137 #include <media/v4l2-common.h>
138 #include <media/v4l2-ioctl.h>
139 #include <media/rds.h>
140 #include <asm/unaligned.h>
141
142
143 /* USB Device ID List */
144 static struct usb_device_id si470x_usb_driver_id_table[] = {
145 /* Silicon Labs USB FM Radio Reference Design */
146 { USB_DEVICE_AND_INTERFACE_INFO(0x10c4, 0x818a, USB_CLASS_HID, 0, 0) },
147 /* ADS/Tech FM Radio Receiver (formerly Instant FM Music) */
148 { USB_DEVICE_AND_INTERFACE_INFO(0x06e1, 0xa155, USB_CLASS_HID, 0, 0) },
149 /* KWorld USB FM Radio SnapMusic Mobile 700 (FM700) */
150 { USB_DEVICE_AND_INTERFACE_INFO(0x1b80, 0xd700, USB_CLASS_HID, 0, 0) },
151 /* Sanei Electric, Inc. FM USB Radio (sold as DealExtreme.com PCear) */
152 { USB_DEVICE_AND_INTERFACE_INFO(0x10c5, 0x819a, USB_CLASS_HID, 0, 0) },
153 /* Terminating entry */
154 { }
155 };
156 MODULE_DEVICE_TABLE(usb, si470x_usb_driver_id_table);
157
158
159
160 /**************************************************************************
161 * Module Parameters
162 **************************************************************************/
163
164 /* Radio Nr */
165 static int radio_nr = -1;
166 module_param(radio_nr, int, 0444);
167 MODULE_PARM_DESC(radio_nr, "Radio Nr");
168
169 /* Spacing (kHz) */
170 /* 0: 200 kHz (USA, Australia) */
171 /* 1: 100 kHz (Europe, Japan) */
172 /* 2: 50 kHz */
173 static unsigned short space = 2;
174 module_param(space, ushort, 0444);
175 MODULE_PARM_DESC(space, "Spacing: 0=200kHz 1=100kHz *2=50kHz*");
176
177 /* Bottom of Band (MHz) */
178 /* 0: 87.5 - 108 MHz (USA, Europe)*/
179 /* 1: 76 - 108 MHz (Japan wide band) */
180 /* 2: 76 - 90 MHz (Japan) */
181 static unsigned short band = 1;
182 module_param(band, ushort, 0444);
183 MODULE_PARM_DESC(band, "Band: 0=87.5..108MHz *1=76..108MHz* 2=76..90MHz");
184
185 /* De-emphasis */
186 /* 0: 75 us (USA) */
187 /* 1: 50 us (Europe, Australia, Japan) */
188 static unsigned short de = 1;
189 module_param(de, ushort, 0444);
190 MODULE_PARM_DESC(de, "De-emphasis: 0=75us *1=50us*");
191
192 /* USB timeout */
193 static unsigned int usb_timeout = 500;
194 module_param(usb_timeout, uint, 0644);
195 MODULE_PARM_DESC(usb_timeout, "USB timeout (ms): *500*");
196
197 /* Tune timeout */
198 static unsigned int tune_timeout = 3000;
199 module_param(tune_timeout, uint, 0644);
200 MODULE_PARM_DESC(tune_timeout, "Tune timeout: *3000*");
201
202 /* Seek timeout */
203 static unsigned int seek_timeout = 5000;
204 module_param(seek_timeout, uint, 0644);
205 MODULE_PARM_DESC(seek_timeout, "Seek timeout: *5000*");
206
207 /* RDS buffer blocks */
208 static unsigned int rds_buf = 100;
209 module_param(rds_buf, uint, 0444);
210 MODULE_PARM_DESC(rds_buf, "RDS buffer entries: *100*");
211
212 /* RDS maximum block errors */
213 static unsigned short max_rds_errors = 1;
214 /* 0 means 0 errors requiring correction */
215 /* 1 means 1-2 errors requiring correction (used by original USBRadio.exe) */
216 /* 2 means 3-5 errors requiring correction */
217 /* 3 means 6+ errors or errors in checkword, correction not possible */
218 module_param(max_rds_errors, ushort, 0644);
219 MODULE_PARM_DESC(max_rds_errors, "RDS maximum block errors: *1*");
220
221 /* RDS poll frequency */
222 static unsigned int rds_poll_time = 40;
223 /* 40 is used by the original USBRadio.exe */
224 /* 50 is used by radio-cadet */
225 /* 75 should be okay */
226 /* 80 is the usual RDS receive interval */
227 module_param(rds_poll_time, uint, 0644);
228 MODULE_PARM_DESC(rds_poll_time, "RDS poll time (ms): *40*");
229
230
231
232 /**************************************************************************
233 * Register Definitions
234 **************************************************************************/
235 #define RADIO_REGISTER_SIZE 2 /* 16 register bit width */
236 #define RADIO_REGISTER_NUM 16 /* DEVICEID ... RDSD */
237 #define RDS_REGISTER_NUM 6 /* STATUSRSSI ... RDSD */
238
239 #define DEVICEID 0 /* Device ID */
240 #define DEVICEID_PN 0xf000 /* bits 15..12: Part Number */
241 #define DEVICEID_MFGID 0x0fff /* bits 11..00: Manufacturer ID */
242
243 #define CHIPID 1 /* Chip ID */
244 #define CHIPID_REV 0xfc00 /* bits 15..10: Chip Version */
245 #define CHIPID_DEV 0x0200 /* bits 09..09: Device */
246 #define CHIPID_FIRMWARE 0x01ff /* bits 08..00: Firmware Version */
247
248 #define POWERCFG 2 /* Power Configuration */
249 #define POWERCFG_DSMUTE 0x8000 /* bits 15..15: Softmute Disable */
250 #define POWERCFG_DMUTE 0x4000 /* bits 14..14: Mute Disable */
251 #define POWERCFG_MONO 0x2000 /* bits 13..13: Mono Select */
252 #define POWERCFG_RDSM 0x0800 /* bits 11..11: RDS Mode (Si4701 only) */
253 #define POWERCFG_SKMODE 0x0400 /* bits 10..10: Seek Mode */
254 #define POWERCFG_SEEKUP 0x0200 /* bits 09..09: Seek Direction */
255 #define POWERCFG_SEEK 0x0100 /* bits 08..08: Seek */
256 #define POWERCFG_DISABLE 0x0040 /* bits 06..06: Powerup Disable */
257 #define POWERCFG_ENABLE 0x0001 /* bits 00..00: Powerup Enable */
258
259 #define CHANNEL 3 /* Channel */
260 #define CHANNEL_TUNE 0x8000 /* bits 15..15: Tune */
261 #define CHANNEL_CHAN 0x03ff /* bits 09..00: Channel Select */
262
263 #define SYSCONFIG1 4 /* System Configuration 1 */
264 #define SYSCONFIG1_RDSIEN 0x8000 /* bits 15..15: RDS Interrupt Enable (Si4701 only) */
265 #define SYSCONFIG1_STCIEN 0x4000 /* bits 14..14: Seek/Tune Complete Interrupt Enable */
266 #define SYSCONFIG1_RDS 0x1000 /* bits 12..12: RDS Enable (Si4701 only) */
267 #define SYSCONFIG1_DE 0x0800 /* bits 11..11: De-emphasis (0=75us 1=50us) */
268 #define SYSCONFIG1_AGCD 0x0400 /* bits 10..10: AGC Disable */
269 #define SYSCONFIG1_BLNDADJ 0x00c0 /* bits 07..06: Stereo/Mono Blend Level Adjustment */
270 #define SYSCONFIG1_GPIO3 0x0030 /* bits 05..04: General Purpose I/O 3 */
271 #define SYSCONFIG1_GPIO2 0x000c /* bits 03..02: General Purpose I/O 2 */
272 #define SYSCONFIG1_GPIO1 0x0003 /* bits 01..00: General Purpose I/O 1 */
273
274 #define SYSCONFIG2 5 /* System Configuration 2 */
275 #define SYSCONFIG2_SEEKTH 0xff00 /* bits 15..08: RSSI Seek Threshold */
276 #define SYSCONFIG2_BAND 0x0080 /* bits 07..06: Band Select */
277 #define SYSCONFIG2_SPACE 0x0030 /* bits 05..04: Channel Spacing */
278 #define SYSCONFIG2_VOLUME 0x000f /* bits 03..00: Volume */
279
280 #define SYSCONFIG3 6 /* System Configuration 3 */
281 #define SYSCONFIG3_SMUTER 0xc000 /* bits 15..14: Softmute Attack/Recover Rate */
282 #define SYSCONFIG3_SMUTEA 0x3000 /* bits 13..12: Softmute Attenuation */
283 #define SYSCONFIG3_SKSNR 0x00f0 /* bits 07..04: Seek SNR Threshold */
284 #define SYSCONFIG3_SKCNT 0x000f /* bits 03..00: Seek FM Impulse Detection Threshold */
285
286 #define TEST1 7 /* Test 1 */
287 #define TEST1_AHIZEN 0x4000 /* bits 14..14: Audio High-Z Enable */
288
289 #define TEST2 8 /* Test 2 */
290 /* TEST2 only contains reserved bits */
291
292 #define BOOTCONFIG 9 /* Boot Configuration */
293 /* BOOTCONFIG only contains reserved bits */
294
295 #define STATUSRSSI 10 /* Status RSSI */
296 #define STATUSRSSI_RDSR 0x8000 /* bits 15..15: RDS Ready (Si4701 only) */
297 #define STATUSRSSI_STC 0x4000 /* bits 14..14: Seek/Tune Complete */
298 #define STATUSRSSI_SF 0x2000 /* bits 13..13: Seek Fail/Band Limit */
299 #define STATUSRSSI_AFCRL 0x1000 /* bits 12..12: AFC Rail */
300 #define STATUSRSSI_RDSS 0x0800 /* bits 11..11: RDS Synchronized (Si4701 only) */
301 #define STATUSRSSI_BLERA 0x0600 /* bits 10..09: RDS Block A Errors (Si4701 only) */
302 #define STATUSRSSI_ST 0x0100 /* bits 08..08: Stereo Indicator */
303 #define STATUSRSSI_RSSI 0x00ff /* bits 07..00: RSSI (Received Signal Strength Indicator) */
304
305 #define READCHAN 11 /* Read Channel */
306 #define READCHAN_BLERB 0xc000 /* bits 15..14: RDS Block D Errors (Si4701 only) */
307 #define READCHAN_BLERC 0x3000 /* bits 13..12: RDS Block C Errors (Si4701 only) */
308 #define READCHAN_BLERD 0x0c00 /* bits 11..10: RDS Block B Errors (Si4701 only) */
309 #define READCHAN_READCHAN 0x03ff /* bits 09..00: Read Channel */
310
311 #define RDSA 12 /* RDSA */
312 #define RDSA_RDSA 0xffff /* bits 15..00: RDS Block A Data (Si4701 only) */
313
314 #define RDSB 13 /* RDSB */
315 #define RDSB_RDSB 0xffff /* bits 15..00: RDS Block B Data (Si4701 only) */
316
317 #define RDSC 14 /* RDSC */
318 #define RDSC_RDSC 0xffff /* bits 15..00: RDS Block C Data (Si4701 only) */
319
320 #define RDSD 15 /* RDSD */
321 #define RDSD_RDSD 0xffff /* bits 15..00: RDS Block D Data (Si4701 only) */
322
323
324
325 /**************************************************************************
326 * USB HID Reports
327 **************************************************************************/
328
329 /* Reports 1-16 give direct read/write access to the 16 Si470x registers */
330 /* with the (REPORT_ID - 1) corresponding to the register address across USB */
331 /* endpoint 0 using GET_REPORT and SET_REPORT */
332 #define REGISTER_REPORT_SIZE (RADIO_REGISTER_SIZE + 1)
333 #define REGISTER_REPORT(reg) ((reg) + 1)
334
335 /* Report 17 gives direct read/write access to the entire Si470x register */
336 /* map across endpoint 0 using GET_REPORT and SET_REPORT */
337 #define ENTIRE_REPORT_SIZE (RADIO_REGISTER_NUM * RADIO_REGISTER_SIZE + 1)
338 #define ENTIRE_REPORT 17
339
340 /* Report 18 is used to send the lowest 6 Si470x registers up the HID */
341 /* interrupt endpoint 1 to Windows every 20 milliseconds for status */
342 #define RDS_REPORT_SIZE (RDS_REGISTER_NUM * RADIO_REGISTER_SIZE + 1)
343 #define RDS_REPORT 18
344
345 /* Report 19: LED state */
346 #define LED_REPORT_SIZE 3
347 #define LED_REPORT 19
348
349 /* Report 19: stream */
350 #define STREAM_REPORT_SIZE 3
351 #define STREAM_REPORT 19
352
353 /* Report 20: scratch */
354 #define SCRATCH_PAGE_SIZE 63
355 #define SCRATCH_REPORT_SIZE (SCRATCH_PAGE_SIZE + 1)
356 #define SCRATCH_REPORT 20
357
358 /* Reports 19-22: flash upgrade of the C8051F321 */
359 #define WRITE_REPORT_SIZE 4
360 #define WRITE_REPORT 19
361 #define FLASH_REPORT_SIZE 64
362 #define FLASH_REPORT 20
363 #define CRC_REPORT_SIZE 3
364 #define CRC_REPORT 21
365 #define RESPONSE_REPORT_SIZE 2
366 #define RESPONSE_REPORT 22
367
368 /* Report 23: currently unused, but can accept 60 byte reports on the HID */
369 /* interrupt out endpoint 2 every 1 millisecond */
370 #define UNUSED_REPORT 23
371
372
373
374 /**************************************************************************
375 * Software/Hardware Versions
376 **************************************************************************/
377 #define RADIO_SW_VERSION_NOT_BOOTLOADABLE 6
378 #define RADIO_SW_VERSION 7
379 #define RADIO_SW_VERSION_CURRENT 15
380 #define RADIO_HW_VERSION 1
381
382 #define SCRATCH_PAGE_SW_VERSION 1
383 #define SCRATCH_PAGE_HW_VERSION 2
384
385
386
387 /**************************************************************************
388 * LED State Definitions
389 **************************************************************************/
390 #define LED_COMMAND 0x35
391
392 #define NO_CHANGE_LED 0x00
393 #define ALL_COLOR_LED 0x01 /* streaming state */
394 #define BLINK_GREEN_LED 0x02 /* connect state */
395 #define BLINK_RED_LED 0x04
396 #define BLINK_ORANGE_LED 0x10 /* disconnect state */
397 #define SOLID_GREEN_LED 0x20 /* tuning/seeking state */
398 #define SOLID_RED_LED 0x40 /* bootload state */
399 #define SOLID_ORANGE_LED 0x80
400
401
402
403 /**************************************************************************
404 * Stream State Definitions
405 **************************************************************************/
406 #define STREAM_COMMAND 0x36
407 #define STREAM_VIDPID 0x00
408 #define STREAM_AUDIO 0xff
409
410
411
412 /**************************************************************************
413 * Bootloader / Flash Commands
414 **************************************************************************/
415
416 /* unique id sent to bootloader and required to put into a bootload state */
417 #define UNIQUE_BL_ID 0x34
418
419 /* mask for the flash data */
420 #define FLASH_DATA_MASK 0x55
421
422 /* bootloader commands */
423 #define GET_SW_VERSION_COMMAND 0x00
424 #define SET_PAGE_COMMAND 0x01
425 #define ERASE_PAGE_COMMAND 0x02
426 #define WRITE_PAGE_COMMAND 0x03
427 #define CRC_ON_PAGE_COMMAND 0x04
428 #define READ_FLASH_BYTE_COMMAND 0x05
429 #define RESET_DEVICE_COMMAND 0x06
430 #define GET_HW_VERSION_COMMAND 0x07
431 #define BLANK 0xff
432
433 /* bootloader command responses */
434 #define COMMAND_OK 0x01
435 #define COMMAND_FAILED 0x02
436 #define COMMAND_PENDING 0x03
437
438
439
440 /**************************************************************************
441 * General Driver Definitions
442 **************************************************************************/
443
444 /*
445 * si470x_device - private data
446 */
447 struct si470x_device {
448 /* reference to USB and video device */
449 struct usb_device *usbdev;
450 struct usb_interface *intf;
451 struct video_device *videodev;
452
453 /* driver management */
454 unsigned int users;
455 unsigned char disconnected;
456 struct mutex disconnect_lock;
457
458 /* Silabs internal registers (0..15) */
459 unsigned short registers[RADIO_REGISTER_NUM];
460
461 /* RDS receive buffer */
462 struct delayed_work work;
463 wait_queue_head_t read_queue;
464 struct mutex lock; /* buffer locking */
465 unsigned char *buffer; /* size is always multiple of three */
466 unsigned int buf_size;
467 unsigned int rd_index;
468 unsigned int wr_index;
469
470 /* scratch page */
471 unsigned char software_version;
472 unsigned char hardware_version;
473 };
474
475
476 /*
477 * The frequency is set in units of 62.5 Hz when using V4L2_TUNER_CAP_LOW,
478 * 62.5 kHz otherwise.
479 * The tuner is able to have a channel spacing of 50, 100 or 200 kHz.
480 * tuner->capability is therefore set to V4L2_TUNER_CAP_LOW
481 * The FREQ_MUL is then: 1 MHz / 62.5 Hz = 16000
482 */
483 #define FREQ_MUL (1000000 / 62.5)
484
485
486
487 /**************************************************************************
488 * General Driver Functions - REGISTER_REPORTs
489 **************************************************************************/
490
491 /*
492 * si470x_get_report - receive a HID report
493 */
494 static int si470x_get_report(struct si470x_device *radio, void *buf, int size)
495 {
496 unsigned char *report = (unsigned char *) buf;
497 int retval;
498
499 retval = usb_control_msg(radio->usbdev,
500 usb_rcvctrlpipe(radio->usbdev, 0),
501 HID_REQ_GET_REPORT,
502 USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,
503 report[0], 2,
504 buf, size, usb_timeout);
505
506 if (retval < 0)
507 printk(KERN_WARNING DRIVER_NAME
508 ": si470x_get_report: usb_control_msg returned %d\n",
509 retval);
510 return retval;
511 }
512
513
514 /*
515 * si470x_set_report - send a HID report
516 */
517 static int si470x_set_report(struct si470x_device *radio, void *buf, int size)
518 {
519 unsigned char *report = (unsigned char *) buf;
520 int retval;
521
522 retval = usb_control_msg(radio->usbdev,
523 usb_sndctrlpipe(radio->usbdev, 0),
524 HID_REQ_SET_REPORT,
525 USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_OUT,
526 report[0], 2,
527 buf, size, usb_timeout);
528
529 if (retval < 0)
530 printk(KERN_WARNING DRIVER_NAME
531 ": si470x_set_report: usb_control_msg returned %d\n",
532 retval);
533 return retval;
534 }
535
536
537 /*
538 * si470x_get_register - read register
539 */
540 static int si470x_get_register(struct si470x_device *radio, int regnr)
541 {
542 unsigned char buf[REGISTER_REPORT_SIZE];
543 int retval;
544
545 buf[0] = REGISTER_REPORT(regnr);
546
547 retval = si470x_get_report(radio, (void *) &buf, sizeof(buf));
548
549 if (retval >= 0)
550 radio->registers[regnr] = get_unaligned_be16(&buf[1]);
551
552 return (retval < 0) ? -EINVAL : 0;
553 }
554
555
556 /*
557 * si470x_set_register - write register
558 */
559 static int si470x_set_register(struct si470x_device *radio, int regnr)
560 {
561 unsigned char buf[REGISTER_REPORT_SIZE];
562 int retval;
563
564 buf[0] = REGISTER_REPORT(regnr);
565 put_unaligned_be16(radio->registers[regnr], &buf[1]);
566
567 retval = si470x_set_report(radio, (void *) &buf, sizeof(buf));
568
569 return (retval < 0) ? -EINVAL : 0;
570 }
571
572
573 /*
574 * si470x_set_chan - set the channel
575 */
576 static int si470x_set_chan(struct si470x_device *radio, unsigned short chan)
577 {
578 int retval;
579 unsigned long timeout;
580 bool timed_out = 0;
581
582 /* start tuning */
583 radio->registers[CHANNEL] &= ~CHANNEL_CHAN;
584 radio->registers[CHANNEL] |= CHANNEL_TUNE | chan;
585 retval = si470x_set_register(radio, CHANNEL);
586 if (retval < 0)
587 goto done;
588
589 /* wait till tune operation has completed */
590 timeout = jiffies + msecs_to_jiffies(tune_timeout);
591 do {
592 retval = si470x_get_register(radio, STATUSRSSI);
593 if (retval < 0)
594 goto stop;
595 timed_out = time_after(jiffies, timeout);
596 } while (((radio->registers[STATUSRSSI] & STATUSRSSI_STC) == 0) &&
597 (!timed_out));
598 if ((radio->registers[STATUSRSSI] & STATUSRSSI_STC) == 0)
599 printk(KERN_WARNING DRIVER_NAME ": tune does not complete\n");
600 if (timed_out)
601 printk(KERN_WARNING DRIVER_NAME
602 ": tune timed out after %u ms\n", tune_timeout);
603
604 stop:
605 /* stop tuning */
606 radio->registers[CHANNEL] &= ~CHANNEL_TUNE;
607 retval = si470x_set_register(radio, CHANNEL);
608
609 done:
610 return retval;
611 }
612
613
614 /*
615 * si470x_get_freq - get the frequency
616 */
617 static int si470x_get_freq(struct si470x_device *radio, unsigned int *freq)
618 {
619 unsigned int spacing, band_bottom;
620 unsigned short chan;
621 int retval;
622
623 /* Spacing (kHz) */
624 switch ((radio->registers[SYSCONFIG2] & SYSCONFIG2_SPACE) >> 4) {
625 /* 0: 200 kHz (USA, Australia) */
626 case 0:
627 spacing = 0.200 * FREQ_MUL; break;
628 /* 1: 100 kHz (Europe, Japan) */
629 case 1:
630 spacing = 0.100 * FREQ_MUL; break;
631 /* 2: 50 kHz */
632 default:
633 spacing = 0.050 * FREQ_MUL; break;
634 };
635
636 /* Bottom of Band (MHz) */
637 switch ((radio->registers[SYSCONFIG2] & SYSCONFIG2_BAND) >> 6) {
638 /* 0: 87.5 - 108 MHz (USA, Europe) */
639 case 0:
640 band_bottom = 87.5 * FREQ_MUL; break;
641 /* 1: 76 - 108 MHz (Japan wide band) */
642 default:
643 band_bottom = 76 * FREQ_MUL; break;
644 /* 2: 76 - 90 MHz (Japan) */
645 case 2:
646 band_bottom = 76 * FREQ_MUL; break;
647 };
648
649 /* read channel */
650 retval = si470x_get_register(radio, READCHAN);
651 chan = radio->registers[READCHAN] & READCHAN_READCHAN;
652
653 /* Frequency (MHz) = Spacing (kHz) x Channel + Bottom of Band (MHz) */
654 *freq = chan * spacing + band_bottom;
655
656 return retval;
657 }
658
659
660 /*
661 * si470x_set_freq - set the frequency
662 */
663 static int si470x_set_freq(struct si470x_device *radio, unsigned int freq)
664 {
665 unsigned int spacing, band_bottom;
666 unsigned short chan;
667
668 /* Spacing (kHz) */
669 switch ((radio->registers[SYSCONFIG2] & SYSCONFIG2_SPACE) >> 4) {
670 /* 0: 200 kHz (USA, Australia) */
671 case 0:
672 spacing = 0.200 * FREQ_MUL; break;
673 /* 1: 100 kHz (Europe, Japan) */
674 case 1:
675 spacing = 0.100 * FREQ_MUL; break;
676 /* 2: 50 kHz */
677 default:
678 spacing = 0.050 * FREQ_MUL; break;
679 };
680
681 /* Bottom of Band (MHz) */
682 switch ((radio->registers[SYSCONFIG2] & SYSCONFIG2_BAND) >> 6) {
683 /* 0: 87.5 - 108 MHz (USA, Europe) */
684 case 0:
685 band_bottom = 87.5 * FREQ_MUL; break;
686 /* 1: 76 - 108 MHz (Japan wide band) */
687 default:
688 band_bottom = 76 * FREQ_MUL; break;
689 /* 2: 76 - 90 MHz (Japan) */
690 case 2:
691 band_bottom = 76 * FREQ_MUL; break;
692 };
693
694 /* Chan = [ Freq (Mhz) - Bottom of Band (MHz) ] / Spacing (kHz) */
695 chan = (freq - band_bottom) / spacing;
696
697 return si470x_set_chan(radio, chan);
698 }
699
700
701 /*
702 * si470x_set_seek - set seek
703 */
704 static int si470x_set_seek(struct si470x_device *radio,
705 unsigned int wrap_around, unsigned int seek_upward)
706 {
707 int retval = 0;
708 unsigned long timeout;
709 bool timed_out = 0;
710
711 /* start seeking */
712 radio->registers[POWERCFG] |= POWERCFG_SEEK;
713 if (wrap_around == 1)
714 radio->registers[POWERCFG] &= ~POWERCFG_SKMODE;
715 else
716 radio->registers[POWERCFG] |= POWERCFG_SKMODE;
717 if (seek_upward == 1)
718 radio->registers[POWERCFG] |= POWERCFG_SEEKUP;
719 else
720 radio->registers[POWERCFG] &= ~POWERCFG_SEEKUP;
721 retval = si470x_set_register(radio, POWERCFG);
722 if (retval < 0)
723 goto done;
724
725 /* wait till seek operation has completed */
726 timeout = jiffies + msecs_to_jiffies(seek_timeout);
727 do {
728 retval = si470x_get_register(radio, STATUSRSSI);
729 if (retval < 0)
730 goto stop;
731 timed_out = time_after(jiffies, timeout);
732 } while (((radio->registers[STATUSRSSI] & STATUSRSSI_STC) == 0) &&
733 (!timed_out));
734 if ((radio->registers[STATUSRSSI] & STATUSRSSI_STC) == 0)
735 printk(KERN_WARNING DRIVER_NAME ": seek does not complete\n");
736 if (radio->registers[STATUSRSSI] & STATUSRSSI_SF)
737 printk(KERN_WARNING DRIVER_NAME
738 ": seek failed / band limit reached\n");
739 if (timed_out)
740 printk(KERN_WARNING DRIVER_NAME
741 ": seek timed out after %u ms\n", seek_timeout);
742
743 stop:
744 /* stop seeking */
745 radio->registers[POWERCFG] &= ~POWERCFG_SEEK;
746 retval = si470x_set_register(radio, POWERCFG);
747
748 done:
749 /* try again, if timed out */
750 if ((retval == 0) && timed_out)
751 retval = -EAGAIN;
752
753 return retval;
754 }
755
756
757 /*
758 * si470x_start - switch on radio
759 */
760 static int si470x_start(struct si470x_device *radio)
761 {
762 int retval;
763
764 /* powercfg */
765 radio->registers[POWERCFG] =
766 POWERCFG_DMUTE | POWERCFG_ENABLE | POWERCFG_RDSM;
767 retval = si470x_set_register(radio, POWERCFG);
768 if (retval < 0)
769 goto done;
770
771 /* sysconfig 1 */
772 radio->registers[SYSCONFIG1] = SYSCONFIG1_DE;
773 retval = si470x_set_register(radio, SYSCONFIG1);
774 if (retval < 0)
775 goto done;
776
777 /* sysconfig 2 */
778 radio->registers[SYSCONFIG2] =
779 (0x3f << 8) | /* SEEKTH */
780 ((band << 6) & SYSCONFIG2_BAND) | /* BAND */
781 ((space << 4) & SYSCONFIG2_SPACE) | /* SPACE */
782 15; /* VOLUME (max) */
783 retval = si470x_set_register(radio, SYSCONFIG2);
784 if (retval < 0)
785 goto done;
786
787 /* reset last channel */
788 retval = si470x_set_chan(radio,
789 radio->registers[CHANNEL] & CHANNEL_CHAN);
790
791 done:
792 return retval;
793 }
794
795
796 /*
797 * si470x_stop - switch off radio
798 */
799 static int si470x_stop(struct si470x_device *radio)
800 {
801 int retval;
802
803 /* sysconfig 1 */
804 radio->registers[SYSCONFIG1] &= ~SYSCONFIG1_RDS;
805 retval = si470x_set_register(radio, SYSCONFIG1);
806 if (retval < 0)
807 goto done;
808
809 /* powercfg */
810 radio->registers[POWERCFG] &= ~POWERCFG_DMUTE;
811 /* POWERCFG_ENABLE has to automatically go low */
812 radio->registers[POWERCFG] |= POWERCFG_ENABLE | POWERCFG_DISABLE;
813 retval = si470x_set_register(radio, POWERCFG);
814
815 done:
816 return retval;
817 }
818
819
820 /*
821 * si470x_rds_on - switch on rds reception
822 */
823 static int si470x_rds_on(struct si470x_device *radio)
824 {
825 int retval;
826
827 /* sysconfig 1 */
828 mutex_lock(&radio->lock);
829 radio->registers[SYSCONFIG1] |= SYSCONFIG1_RDS;
830 retval = si470x_set_register(radio, SYSCONFIG1);
831 if (retval < 0)
832 radio->registers[SYSCONFIG1] &= ~SYSCONFIG1_RDS;
833 mutex_unlock(&radio->lock);
834
835 return retval;
836 }
837
838
839
840 /**************************************************************************
841 * General Driver Functions - ENTIRE_REPORT
842 **************************************************************************/
843
844 /*
845 * si470x_get_all_registers - read entire registers
846 */
847 static int si470x_get_all_registers(struct si470x_device *radio)
848 {
849 unsigned char buf[ENTIRE_REPORT_SIZE];
850 int retval;
851 unsigned char regnr;
852
853 buf[0] = ENTIRE_REPORT;
854
855 retval = si470x_get_report(radio, (void *) &buf, sizeof(buf));
856
857 if (retval >= 0)
858 for (regnr = 0; regnr < RADIO_REGISTER_NUM; regnr++)
859 radio->registers[regnr] = get_unaligned_be16(
860 &buf[regnr * RADIO_REGISTER_SIZE + 1]);
861
862 return (retval < 0) ? -EINVAL : 0;
863 }
864
865
866
867 /**************************************************************************
868 * General Driver Functions - RDS_REPORT
869 **************************************************************************/
870
871 /*
872 * si470x_get_rds_registers - read rds registers
873 */
874 static int si470x_get_rds_registers(struct si470x_device *radio)
875 {
876 unsigned char buf[RDS_REPORT_SIZE];
877 int retval;
878 int size;
879 unsigned char regnr;
880
881 buf[0] = RDS_REPORT;
882
883 retval = usb_interrupt_msg(radio->usbdev,
884 usb_rcvintpipe(radio->usbdev, 1),
885 (void *) &buf, sizeof(buf), &size, usb_timeout);
886 if (size != sizeof(buf))
887 printk(KERN_WARNING DRIVER_NAME ": si470x_get_rds_registers: "
888 "return size differs: %d != %zu\n", size, sizeof(buf));
889 if (retval < 0)
890 printk(KERN_WARNING DRIVER_NAME ": si470x_get_rds_registers: "
891 "usb_interrupt_msg returned %d\n", retval);
892
893 if (retval >= 0)
894 for (regnr = 0; regnr < RDS_REGISTER_NUM; regnr++)
895 radio->registers[STATUSRSSI + regnr] =
896 get_unaligned_be16(
897 &buf[regnr * RADIO_REGISTER_SIZE + 1]);
898
899 return (retval < 0) ? -EINVAL : 0;
900 }
901
902
903
904 /**************************************************************************
905 * General Driver Functions - LED_REPORT
906 **************************************************************************/
907
908 /*
909 * si470x_set_led_state - sets the led state
910 */
911 static int si470x_set_led_state(struct si470x_device *radio,
912 unsigned char led_state)
913 {
914 unsigned char buf[LED_REPORT_SIZE];
915 int retval;
916
917 buf[0] = LED_REPORT;
918 buf[1] = LED_COMMAND;
919 buf[2] = led_state;
920
921 retval = si470x_set_report(radio, (void *) &buf, sizeof(buf));
922
923 return (retval < 0) ? -EINVAL : 0;
924 }
925
926
927
928 /**************************************************************************
929 * General Driver Functions - SCRATCH_REPORT
930 **************************************************************************/
931
932 /*
933 * si470x_get_scratch_versions - gets the scratch page and version infos
934 */
935 static int si470x_get_scratch_page_versions(struct si470x_device *radio)
936 {
937 unsigned char buf[SCRATCH_REPORT_SIZE];
938 int retval;
939
940 buf[0] = SCRATCH_REPORT;
941
942 retval = si470x_get_report(radio, (void *) &buf, sizeof(buf));
943
944 if (retval < 0)
945 printk(KERN_WARNING DRIVER_NAME ": si470x_get_scratch: "
946 "si470x_get_report returned %d\n", retval);
947 else {
948 radio->software_version = buf[1];
949 radio->hardware_version = buf[2];
950 }
951
952 return (retval < 0) ? -EINVAL : 0;
953 }
954
955
956
957 /**************************************************************************
958 * RDS Driver Functions
959 **************************************************************************/
960
961 /*
962 * si470x_rds - rds processing function
963 */
964 static void si470x_rds(struct si470x_device *radio)
965 {
966 unsigned char blocknum;
967 unsigned short bler; /* rds block errors */
968 unsigned short rds;
969 unsigned char tmpbuf[3];
970
971 /* get rds blocks */
972 if (si470x_get_rds_registers(radio) < 0)
973 return;
974 if ((radio->registers[STATUSRSSI] & STATUSRSSI_RDSR) == 0) {
975 /* No RDS group ready */
976 return;
977 }
978 if ((radio->registers[STATUSRSSI] & STATUSRSSI_RDSS) == 0) {
979 /* RDS decoder not synchronized */
980 return;
981 }
982
983 /* copy all four RDS blocks to internal buffer */
984 mutex_lock(&radio->lock);
985 for (blocknum = 0; blocknum < 4; blocknum++) {
986 switch (blocknum) {
987 default:
988 bler = (radio->registers[STATUSRSSI] &
989 STATUSRSSI_BLERA) >> 9;
990 rds = radio->registers[RDSA];
991 break;
992 case 1:
993 bler = (radio->registers[READCHAN] &
994 READCHAN_BLERB) >> 14;
995 rds = radio->registers[RDSB];
996 break;
997 case 2:
998 bler = (radio->registers[READCHAN] &
999 READCHAN_BLERC) >> 12;
1000 rds = radio->registers[RDSC];
1001 break;
1002 case 3:
1003 bler = (radio->registers[READCHAN] &
1004 READCHAN_BLERD) >> 10;
1005 rds = radio->registers[RDSD];
1006 break;
1007 };
1008
1009 /* Fill the V4L2 RDS buffer */
1010 put_unaligned_le16(rds, &tmpbuf);
1011 tmpbuf[2] = blocknum; /* offset name */
1012 tmpbuf[2] |= blocknum << 3; /* received offset */
1013 if (bler > max_rds_errors)
1014 tmpbuf[2] |= 0x80; /* uncorrectable errors */
1015 else if (bler > 0)
1016 tmpbuf[2] |= 0x40; /* corrected error(s) */
1017
1018 /* copy RDS block to internal buffer */
1019 memcpy(&radio->buffer[radio->wr_index], &tmpbuf, 3);
1020 radio->wr_index += 3;
1021
1022 /* wrap write pointer */
1023 if (radio->wr_index >= radio->buf_size)
1024 radio->wr_index = 0;
1025
1026 /* check for overflow */
1027 if (radio->wr_index == radio->rd_index) {
1028 /* increment and wrap read pointer */
1029 radio->rd_index += 3;
1030 if (radio->rd_index >= radio->buf_size)
1031 radio->rd_index = 0;
1032 }
1033 }
1034 mutex_unlock(&radio->lock);
1035
1036 /* wake up read queue */
1037 if (radio->wr_index != radio->rd_index)
1038 wake_up_interruptible(&radio->read_queue);
1039 }
1040
1041
1042 /*
1043 * si470x_work - rds work function
1044 */
1045 static void si470x_work(struct work_struct *work)
1046 {
1047 struct si470x_device *radio = container_of(work, struct si470x_device,
1048 work.work);
1049
1050 /* safety checks */
1051 if (radio->disconnected)
1052 return;
1053 if ((radio->registers[SYSCONFIG1] & SYSCONFIG1_RDS) == 0)
1054 return;
1055
1056 si470x_rds(radio);
1057 schedule_delayed_work(&radio->work, msecs_to_jiffies(rds_poll_time));
1058 }
1059
1060
1061
1062 /**************************************************************************
1063 * File Operations Interface
1064 **************************************************************************/
1065
1066 /*
1067 * si470x_fops_read - read RDS data
1068 */
1069 static ssize_t si470x_fops_read(struct file *file, char __user *buf,
1070 size_t count, loff_t *ppos)
1071 {
1072 struct si470x_device *radio = video_drvdata(file);
1073 int retval = 0;
1074 unsigned int block_count = 0;
1075
1076 /* switch on rds reception */
1077 if ((radio->registers[SYSCONFIG1] & SYSCONFIG1_RDS) == 0) {
1078 si470x_rds_on(radio);
1079 schedule_delayed_work(&radio->work,
1080 msecs_to_jiffies(rds_poll_time));
1081 }
1082
1083 /* block if no new data available */
1084 while (radio->wr_index == radio->rd_index) {
1085 if (file->f_flags & O_NONBLOCK) {
1086 retval = -EWOULDBLOCK;
1087 goto done;
1088 }
1089 if (wait_event_interruptible(radio->read_queue,
1090 radio->wr_index != radio->rd_index) < 0) {
1091 retval = -EINTR;
1092 goto done;
1093 }
1094 }
1095
1096 /* calculate block count from byte count */
1097 count /= 3;
1098
1099 /* copy RDS block out of internal buffer and to user buffer */
1100 mutex_lock(&radio->lock);
1101 while (block_count < count) {
1102 if (radio->rd_index == radio->wr_index)
1103 break;
1104
1105 /* always transfer rds complete blocks */
1106 if (copy_to_user(buf, &radio->buffer[radio->rd_index], 3))
1107 /* retval = -EFAULT; */
1108 break;
1109
1110 /* increment and wrap read pointer */
1111 radio->rd_index += 3;
1112 if (radio->rd_index >= radio->buf_size)
1113 radio->rd_index = 0;
1114
1115 /* increment counters */
1116 block_count++;
1117 buf += 3;
1118 retval += 3;
1119 }
1120 mutex_unlock(&radio->lock);
1121
1122 done:
1123 return retval;
1124 }
1125
1126
1127 /*
1128 * si470x_fops_poll - poll RDS data
1129 */
1130 static unsigned int si470x_fops_poll(struct file *file,
1131 struct poll_table_struct *pts)
1132 {
1133 struct si470x_device *radio = video_drvdata(file);
1134 int retval = 0;
1135
1136 /* switch on rds reception */
1137 if ((radio->registers[SYSCONFIG1] & SYSCONFIG1_RDS) == 0) {
1138 si470x_rds_on(radio);
1139 schedule_delayed_work(&radio->work,
1140 msecs_to_jiffies(rds_poll_time));
1141 }
1142
1143 poll_wait(file, &radio->read_queue, pts);
1144
1145 if (radio->rd_index != radio->wr_index)
1146 retval = POLLIN | POLLRDNORM;
1147
1148 return retval;
1149 }
1150
1151
1152 /*
1153 * si470x_fops_open - file open
1154 */
1155 static int si470x_fops_open(struct file *file)
1156 {
1157 struct si470x_device *radio = video_drvdata(file);
1158 int retval;
1159
1160 lock_kernel();
1161 radio->users++;
1162
1163 retval = usb_autopm_get_interface(radio->intf);
1164 if (retval < 0) {
1165 radio->users--;
1166 retval = -EIO;
1167 goto done;
1168 }
1169
1170 if (radio->users == 1) {
1171 /* start radio */
1172 retval = si470x_start(radio);
1173 if (retval < 0)
1174 usb_autopm_put_interface(radio->intf);
1175 }
1176
1177 done:
1178 unlock_kernel();
1179 return retval;
1180 }
1181
1182
1183 /*
1184 * si470x_fops_release - file release
1185 */
1186 static int si470x_fops_release(struct file *file)
1187 {
1188 struct si470x_device *radio = video_drvdata(file);
1189 int retval = 0;
1190
1191 /* safety check */
1192 if (!radio) {
1193 retval = -ENODEV;
1194 goto done;
1195 }
1196
1197 mutex_lock(&radio->disconnect_lock);
1198 radio->users--;
1199 if (radio->users == 0) {
1200 if (radio->disconnected) {
1201 video_unregister_device(radio->videodev);
1202 kfree(radio->buffer);
1203 kfree(radio);
1204 goto unlock;
1205 }
1206
1207 /* stop rds reception */
1208 cancel_delayed_work_sync(&radio->work);
1209
1210 /* cancel read processes */
1211 wake_up_interruptible(&radio->read_queue);
1212
1213 /* stop radio */
1214 retval = si470x_stop(radio);
1215 usb_autopm_put_interface(radio->intf);
1216 }
1217 unlock:
1218 mutex_unlock(&radio->disconnect_lock);
1219 done:
1220 return retval;
1221 }
1222
1223
1224 /*
1225 * si470x_fops - file operations interface
1226 */
1227 static const struct v4l2_file_operations si470x_fops = {
1228 .owner = THIS_MODULE,
1229 .read = si470x_fops_read,
1230 .poll = si470x_fops_poll,
1231 .ioctl = video_ioctl2,
1232 .open = si470x_fops_open,
1233 .release = si470x_fops_release,
1234 };
1235
1236
1237
1238 /**************************************************************************
1239 * Video4Linux Interface
1240 **************************************************************************/
1241
1242 /*
1243 * si470x_v4l2_queryctrl - query control
1244 */
1245 static struct v4l2_queryctrl si470x_v4l2_queryctrl[] = {
1246 {
1247 .id = V4L2_CID_AUDIO_VOLUME,
1248 .type = V4L2_CTRL_TYPE_INTEGER,
1249 .name = "Volume",
1250 .minimum = 0,
1251 .maximum = 15,
1252 .step = 1,
1253 .default_value = 15,
1254 },
1255 {
1256 .id = V4L2_CID_AUDIO_MUTE,
1257 .type = V4L2_CTRL_TYPE_BOOLEAN,
1258 .name = "Mute",
1259 .minimum = 0,
1260 .maximum = 1,
1261 .step = 1,
1262 .default_value = 1,
1263 },
1264 };
1265
1266
1267 /*
1268 * si470x_vidioc_querycap - query device capabilities
1269 */
1270 static int si470x_vidioc_querycap(struct file *file, void *priv,
1271 struct v4l2_capability *capability)
1272 {
1273 struct si470x_device *radio = video_drvdata(file);
1274
1275 strlcpy(capability->driver, DRIVER_NAME, sizeof(capability->driver));
1276 strlcpy(capability->card, DRIVER_CARD, sizeof(capability->card));
1277 usb_make_path(radio->usbdev, capability->bus_info, sizeof(capability->bus_info));
1278 capability->version = DRIVER_KERNEL_VERSION;
1279 capability->capabilities = V4L2_CAP_HW_FREQ_SEEK |
1280 V4L2_CAP_TUNER | V4L2_CAP_RADIO;
1281
1282 return 0;
1283 }
1284
1285
1286 /*
1287 * si470x_vidioc_queryctrl - enumerate control items
1288 */
1289 static int si470x_vidioc_queryctrl(struct file *file, void *priv,
1290 struct v4l2_queryctrl *qc)
1291 {
1292 unsigned char i = 0;
1293 int retval = -EINVAL;
1294
1295 /* abort if qc->id is below V4L2_CID_BASE */
1296 if (qc->id < V4L2_CID_BASE)
1297 goto done;
1298
1299 /* search video control */
1300 for (i = 0; i < ARRAY_SIZE(si470x_v4l2_queryctrl); i++) {
1301 if (qc->id == si470x_v4l2_queryctrl[i].id) {
1302 memcpy(qc, &(si470x_v4l2_queryctrl[i]), sizeof(*qc));
1303 retval = 0; /* found */
1304 break;
1305 }
1306 }
1307
1308 /* disable unsupported base controls */
1309 /* to satisfy kradio and such apps */
1310 if ((retval == -EINVAL) && (qc->id < V4L2_CID_LASTP1)) {
1311 qc->flags = V4L2_CTRL_FLAG_DISABLED;
1312 retval = 0;
1313 }
1314
1315 done:
1316 if (retval < 0)
1317 printk(KERN_WARNING DRIVER_NAME
1318 ": query controls failed with %d\n", retval);
1319 return retval;
1320 }
1321
1322
1323 /*
1324 * si470x_vidioc_g_ctrl - get the value of a control
1325 */
1326 static int si470x_vidioc_g_ctrl(struct file *file, void *priv,
1327 struct v4l2_control *ctrl)
1328 {
1329 struct si470x_device *radio = video_drvdata(file);
1330 int retval = 0;
1331
1332 /* safety checks */
1333 if (radio->disconnected) {
1334 retval = -EIO;
1335 goto done;
1336 }
1337
1338 switch (ctrl->id) {
1339 case V4L2_CID_AUDIO_VOLUME:
1340 ctrl->value = radio->registers[SYSCONFIG2] &
1341 SYSCONFIG2_VOLUME;
1342 break;
1343 case V4L2_CID_AUDIO_MUTE:
1344 ctrl->value = ((radio->registers[POWERCFG] &
1345 POWERCFG_DMUTE) == 0) ? 1 : 0;
1346 break;
1347 default:
1348 retval = -EINVAL;
1349 }
1350
1351 done:
1352 if (retval < 0)
1353 printk(KERN_WARNING DRIVER_NAME
1354 ": get control failed with %d\n", retval);
1355 return retval;
1356 }
1357
1358
1359 /*
1360 * si470x_vidioc_s_ctrl - set the value of a control
1361 */
1362 static int si470x_vidioc_s_ctrl(struct file *file, void *priv,
1363 struct v4l2_control *ctrl)
1364 {
1365 struct si470x_device *radio = video_drvdata(file);
1366 int retval = 0;
1367
1368 /* safety checks */
1369 if (radio->disconnected) {
1370 retval = -EIO;
1371 goto done;
1372 }
1373
1374 switch (ctrl->id) {
1375 case V4L2_CID_AUDIO_VOLUME:
1376 radio->registers[SYSCONFIG2] &= ~SYSCONFIG2_VOLUME;
1377 radio->registers[SYSCONFIG2] |= ctrl->value;
1378 retval = si470x_set_register(radio, SYSCONFIG2);
1379 break;
1380 case V4L2_CID_AUDIO_MUTE:
1381 if (ctrl->value == 1)
1382 radio->registers[POWERCFG] &= ~POWERCFG_DMUTE;
1383 else
1384 radio->registers[POWERCFG] |= POWERCFG_DMUTE;
1385 retval = si470x_set_register(radio, POWERCFG);
1386 break;
1387 default:
1388 retval = -EINVAL;
1389 }
1390
1391 done:
1392 if (retval < 0)
1393 printk(KERN_WARNING DRIVER_NAME
1394 ": set control failed with %d\n", retval);
1395 return retval;
1396 }
1397
1398
1399 /*
1400 * si470x_vidioc_g_audio - get audio attributes
1401 */
1402 static int si470x_vidioc_g_audio(struct file *file, void *priv,
1403 struct v4l2_audio *audio)
1404 {
1405 /* driver constants */
1406 audio->index = 0;
1407 strcpy(audio->name, "Radio");
1408 audio->capability = V4L2_AUDCAP_STEREO;
1409 audio->mode = 0;
1410
1411 return 0;
1412 }
1413
1414
1415 /*
1416 * si470x_vidioc_g_tuner - get tuner attributes
1417 */
1418 static int si470x_vidioc_g_tuner(struct file *file, void *priv,
1419 struct v4l2_tuner *tuner)
1420 {
1421 struct si470x_device *radio = video_drvdata(file);
1422 int retval = 0;
1423
1424 /* safety checks */
1425 if (radio->disconnected) {
1426 retval = -EIO;
1427 goto done;
1428 }
1429 if (tuner->index != 0) {
1430 retval = -EINVAL;
1431 goto done;
1432 }
1433
1434 retval = si470x_get_register(radio, STATUSRSSI);
1435 if (retval < 0)
1436 goto done;
1437
1438 /* driver constants */
1439 strcpy(tuner->name, "FM");
1440 tuner->type = V4L2_TUNER_RADIO;
1441 tuner->capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO;
1442
1443 /* range limits */
1444 switch ((radio->registers[SYSCONFIG2] & SYSCONFIG2_BAND) >> 6) {
1445 /* 0: 87.5 - 108 MHz (USA, Europe, default) */
1446 default:
1447 tuner->rangelow = 87.5 * FREQ_MUL;
1448 tuner->rangehigh = 108 * FREQ_MUL;
1449 break;
1450 /* 1: 76 - 108 MHz (Japan wide band) */
1451 case 1 :
1452 tuner->rangelow = 76 * FREQ_MUL;
1453 tuner->rangehigh = 108 * FREQ_MUL;
1454 break;
1455 /* 2: 76 - 90 MHz (Japan) */
1456 case 2 :
1457 tuner->rangelow = 76 * FREQ_MUL;
1458 tuner->rangehigh = 90 * FREQ_MUL;
1459 break;
1460 };
1461
1462 /* stereo indicator == stereo (instead of mono) */
1463 if ((radio->registers[STATUSRSSI] & STATUSRSSI_ST) == 0)
1464 tuner->rxsubchans = V4L2_TUNER_SUB_MONO;
1465 else
1466 tuner->rxsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO;
1467
1468 /* mono/stereo selector */
1469 if ((radio->registers[POWERCFG] & POWERCFG_MONO) == 0)
1470 tuner->audmode = V4L2_TUNER_MODE_STEREO;
1471 else
1472 tuner->audmode = V4L2_TUNER_MODE_MONO;
1473
1474 /* min is worst, max is best; signal:0..0xffff; rssi: 0..0xff */
1475 /* measured in units of dbµV in 1 db increments (max at ~75 dbµV) */
1476 tuner->signal = (radio->registers[STATUSRSSI] & STATUSRSSI_RSSI);
1477 /* the ideal factor is 0xffff/75 = 873,8 */
1478 tuner->signal = (tuner->signal * 873) + (8 * tuner->signal / 10);
1479
1480 /* automatic frequency control: -1: freq to low, 1 freq to high */
1481 /* AFCRL does only indicate that freq. differs, not if too low/high */
1482 tuner->afc = (radio->registers[STATUSRSSI] & STATUSRSSI_AFCRL) ? 1 : 0;
1483
1484 done:
1485 if (retval < 0)
1486 printk(KERN_WARNING DRIVER_NAME
1487 ": get tuner failed with %d\n", retval);
1488 return retval;
1489 }
1490
1491
1492 /*
1493 * si470x_vidioc_s_tuner - set tuner attributes
1494 */
1495 static int si470x_vidioc_s_tuner(struct file *file, void *priv,
1496 struct v4l2_tuner *tuner)
1497 {
1498 struct si470x_device *radio = video_drvdata(file);
1499 int retval = -EINVAL;
1500
1501 /* safety checks */
1502 if (radio->disconnected) {
1503 retval = -EIO;
1504 goto done;
1505 }
1506 if (tuner->index != 0)
1507 goto done;
1508
1509 /* mono/stereo selector */
1510 switch (tuner->audmode) {
1511 case V4L2_TUNER_MODE_MONO:
1512 radio->registers[POWERCFG] |= POWERCFG_MONO; /* force mono */
1513 break;
1514 case V4L2_TUNER_MODE_STEREO:
1515 radio->registers[POWERCFG] &= ~POWERCFG_MONO; /* try stereo */
1516 break;
1517 default:
1518 goto done;
1519 }
1520
1521 retval = si470x_set_register(radio, POWERCFG);
1522
1523 done:
1524 if (retval < 0)
1525 printk(KERN_WARNING DRIVER_NAME
1526 ": set tuner failed with %d\n", retval);
1527 return retval;
1528 }
1529
1530
1531 /*
1532 * si470x_vidioc_g_frequency - get tuner or modulator radio frequency
1533 */
1534 static int si470x_vidioc_g_frequency(struct file *file, void *priv,
1535 struct v4l2_frequency *freq)
1536 {
1537 struct si470x_device *radio = video_drvdata(file);
1538 int retval = 0;
1539
1540 /* safety checks */
1541 if (radio->disconnected) {
1542 retval = -EIO;
1543 goto done;
1544 }
1545 if (freq->tuner != 0) {
1546 retval = -EINVAL;
1547 goto done;
1548 }
1549
1550 freq->type = V4L2_TUNER_RADIO;
1551 retval = si470x_get_freq(radio, &freq->frequency);
1552
1553 done:
1554 if (retval < 0)
1555 printk(KERN_WARNING DRIVER_NAME
1556 ": get frequency failed with %d\n", retval);
1557 return retval;
1558 }
1559
1560
1561 /*
1562 * si470x_vidioc_s_frequency - set tuner or modulator radio frequency
1563 */
1564 static int si470x_vidioc_s_frequency(struct file *file, void *priv,
1565 struct v4l2_frequency *freq)
1566 {
1567 struct si470x_device *radio = video_drvdata(file);
1568 int retval = 0;
1569
1570 /* safety checks */
1571 if (radio->disconnected) {
1572 retval = -EIO;
1573 goto done;
1574 }
1575 if (freq->tuner != 0) {
1576 retval = -EINVAL;
1577 goto done;
1578 }
1579
1580 retval = si470x_set_freq(radio, freq->frequency);
1581
1582 done:
1583 if (retval < 0)
1584 printk(KERN_WARNING DRIVER_NAME
1585 ": set frequency failed with %d\n", retval);
1586 return retval;
1587 }
1588
1589
1590 /*
1591 * si470x_vidioc_s_hw_freq_seek - set hardware frequency seek
1592 */
1593 static int si470x_vidioc_s_hw_freq_seek(struct file *file, void *priv,
1594 struct v4l2_hw_freq_seek *seek)
1595 {
1596 struct si470x_device *radio = video_drvdata(file);
1597 int retval = 0;
1598
1599 /* safety checks */
1600 if (radio->disconnected) {
1601 retval = -EIO;
1602 goto done;
1603 }
1604 if (seek->tuner != 0) {
1605 retval = -EINVAL;
1606 goto done;
1607 }
1608
1609 retval = si470x_set_seek(radio, seek->wrap_around, seek->seek_upward);
1610
1611 done:
1612 if (retval < 0)
1613 printk(KERN_WARNING DRIVER_NAME
1614 ": set hardware frequency seek failed with %d\n",
1615 retval);
1616 return retval;
1617 }
1618
1619
1620 /*
1621 * si470x_ioctl_ops - video device ioctl operations
1622 */
1623 static const struct v4l2_ioctl_ops si470x_ioctl_ops = {
1624 .vidioc_querycap = si470x_vidioc_querycap,
1625 .vidioc_queryctrl = si470x_vidioc_queryctrl,
1626 .vidioc_g_ctrl = si470x_vidioc_g_ctrl,
1627 .vidioc_s_ctrl = si470x_vidioc_s_ctrl,
1628 .vidioc_g_audio = si470x_vidioc_g_audio,
1629 .vidioc_g_tuner = si470x_vidioc_g_tuner,
1630 .vidioc_s_tuner = si470x_vidioc_s_tuner,
1631 .vidioc_g_frequency = si470x_vidioc_g_frequency,
1632 .vidioc_s_frequency = si470x_vidioc_s_frequency,
1633 .vidioc_s_hw_freq_seek = si470x_vidioc_s_hw_freq_seek,
1634 };
1635
1636
1637 /*
1638 * si470x_viddev_template - video device interface
1639 */
1640 static struct video_device si470x_viddev_template = {
1641 .fops = &si470x_fops,
1642 .name = DRIVER_NAME,
1643 .release = video_device_release,
1644 .ioctl_ops = &si470x_ioctl_ops,
1645 };
1646
1647
1648
1649 /**************************************************************************
1650 * USB Interface
1651 **************************************************************************/
1652
1653 /*
1654 * si470x_usb_driver_probe - probe for the device
1655 */
1656 static int si470x_usb_driver_probe(struct usb_interface *intf,
1657 const struct usb_device_id *id)
1658 {
1659 struct si470x_device *radio;
1660 int retval = 0;
1661
1662 /* private data allocation and initialization */
1663 radio = kzalloc(sizeof(struct si470x_device), GFP_KERNEL);
1664 if (!radio) {
1665 retval = -ENOMEM;
1666 goto err_initial;
1667 }
1668 radio->users = 0;
1669 radio->disconnected = 0;
1670 radio->usbdev = interface_to_usbdev(intf);
1671 radio->intf = intf;
1672 mutex_init(&radio->disconnect_lock);
1673 mutex_init(&radio->lock);
1674
1675 /* video device allocation and initialization */
1676 radio->videodev = video_device_alloc();
1677 if (!radio->videodev) {
1678 retval = -ENOMEM;
1679 goto err_radio;
1680 }
1681 memcpy(radio->videodev, &si470x_viddev_template,
1682 sizeof(si470x_viddev_template));
1683 video_set_drvdata(radio->videodev, radio);
1684
1685 /* show some infos about the specific si470x device */
1686 if (si470x_get_all_registers(radio) < 0) {
1687 retval = -EIO;
1688 goto err_video;
1689 }
1690 printk(KERN_INFO DRIVER_NAME ": DeviceID=0x%4.4hx ChipID=0x%4.4hx\n",
1691 radio->registers[DEVICEID], radio->registers[CHIPID]);
1692
1693 /* get software and hardware versions */
1694 if (si470x_get_scratch_page_versions(radio) < 0) {
1695 retval = -EIO;
1696 goto err_video;
1697 }
1698 printk(KERN_INFO DRIVER_NAME
1699 ": software version %d, hardware version %d\n",
1700 radio->software_version, radio->hardware_version);
1701
1702 /* check if device and firmware is current */
1703 if ((radio->registers[CHIPID] & CHIPID_FIRMWARE)
1704 < RADIO_SW_VERSION_CURRENT) {
1705 printk(KERN_WARNING DRIVER_NAME
1706 ": This driver is known to work with "
1707 "firmware version %hu,\n", RADIO_SW_VERSION_CURRENT);
1708 printk(KERN_WARNING DRIVER_NAME
1709 ": but the device has firmware version %hu.\n",
1710 radio->registers[CHIPID] & CHIPID_FIRMWARE);
1711 printk(KERN_WARNING DRIVER_NAME
1712 ": If you have some trouble using this driver,\n");
1713 printk(KERN_WARNING DRIVER_NAME
1714 ": please report to V4L ML at "
1715 "linux-media@vger.kernel.org\n");
1716 }
1717
1718 /* set initial frequency */
1719 si470x_set_freq(radio, 87.5 * FREQ_MUL); /* available in all regions */
1720
1721 /* set led to connect state */
1722 si470x_set_led_state(radio, BLINK_GREEN_LED);
1723
1724 /* rds buffer allocation */
1725 radio->buf_size = rds_buf * 3;
1726 radio->buffer = kmalloc(radio->buf_size, GFP_KERNEL);
1727 if (!radio->buffer) {
1728 retval = -EIO;
1729 goto err_video;
1730 }
1731
1732 /* rds buffer configuration */
1733 radio->wr_index = 0;
1734 radio->rd_index = 0;
1735 init_waitqueue_head(&radio->read_queue);
1736
1737 /* prepare rds work function */
1738 INIT_DELAYED_WORK(&radio->work, si470x_work);
1739
1740 /* register video device */
1741 retval = video_register_device(radio->videodev, VFL_TYPE_RADIO, radio_nr);
1742 if (retval) {
1743 printk(KERN_WARNING DRIVER_NAME
1744 ": Could not register video device\n");
1745 goto err_all;
1746 }
1747 usb_set_intfdata(intf, radio);
1748
1749 return 0;
1750 err_all:
1751 kfree(radio->buffer);
1752 err_video:
1753 video_device_release(radio->videodev);
1754 err_radio:
1755 kfree(radio);
1756 err_initial:
1757 return retval;
1758 }
1759
1760
1761 /*
1762 * si470x_usb_driver_suspend - suspend the device
1763 */
1764 static int si470x_usb_driver_suspend(struct usb_interface *intf,
1765 pm_message_t message)
1766 {
1767 struct si470x_device *radio = usb_get_intfdata(intf);
1768
1769 printk(KERN_INFO DRIVER_NAME ": suspending now...\n");
1770
1771 cancel_delayed_work_sync(&radio->work);
1772
1773 return 0;
1774 }
1775
1776
1777 /*
1778 * si470x_usb_driver_resume - resume the device
1779 */
1780 static int si470x_usb_driver_resume(struct usb_interface *intf)
1781 {
1782 struct si470x_device *radio = usb_get_intfdata(intf);
1783
1784 printk(KERN_INFO DRIVER_NAME ": resuming now...\n");
1785
1786 mutex_lock(&radio->lock);
1787 if (radio->users && radio->registers[SYSCONFIG1] & SYSCONFIG1_RDS)
1788 schedule_delayed_work(&radio->work,
1789 msecs_to_jiffies(rds_poll_time));
1790 mutex_unlock(&radio->lock);
1791
1792 return 0;
1793 }
1794
1795
1796 /*
1797 * si470x_usb_driver_disconnect - disconnect the device
1798 */
1799 static void si470x_usb_driver_disconnect(struct usb_interface *intf)
1800 {
1801 struct si470x_device *radio = usb_get_intfdata(intf);
1802
1803 mutex_lock(&radio->disconnect_lock);
1804 radio->disconnected = 1;
1805 cancel_delayed_work_sync(&radio->work);
1806 usb_set_intfdata(intf, NULL);
1807 if (radio->users == 0) {
1808 /* set led to disconnect state */
1809 si470x_set_led_state(radio, BLINK_ORANGE_LED);
1810
1811 video_unregister_device(radio->videodev);
1812 kfree(radio->buffer);
1813 kfree(radio);
1814 }
1815 mutex_unlock(&radio->disconnect_lock);
1816 }
1817
1818
1819 /*
1820 * si470x_usb_driver - usb driver interface
1821 */
1822 static struct usb_driver si470x_usb_driver = {
1823 .name = DRIVER_NAME,
1824 .probe = si470x_usb_driver_probe,
1825 .disconnect = si470x_usb_driver_disconnect,
1826 .suspend = si470x_usb_driver_suspend,
1827 .resume = si470x_usb_driver_resume,
1828 .id_table = si470x_usb_driver_id_table,
1829 .supports_autosuspend = 1,
1830 };
1831
1832
1833
1834 /**************************************************************************
1835 * Module Interface
1836 **************************************************************************/
1837
1838 /*
1839 * si470x_module_init - module init
1840 */
1841 static int __init si470x_module_init(void)
1842 {
1843 printk(KERN_INFO DRIVER_DESC ", Version " DRIVER_VERSION "\n");
1844 return usb_register(&si470x_usb_driver);
1845 }
1846
1847
1848 /*
1849 * si470x_module_exit - module exit
1850 */
1851 static void __exit si470x_module_exit(void)
1852 {
1853 usb_deregister(&si470x_usb_driver);
1854 }
1855
1856
1857 module_init(si470x_module_init);
1858 module_exit(si470x_module_exit);
1859
1860 MODULE_LICENSE("GPL");
1861 MODULE_AUTHOR(DRIVER_AUTHOR);
1862 MODULE_DESCRIPTION(DRIVER_DESC);
1863 MODULE_VERSION(DRIVER_VERSION);
Linux kernel - Deliverables
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