2 * drivers/media/radio/radio-si470x.c
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)
9 * Copyright (c) 2008 Tobias Lorenz <tobias.lorenz@gmx.net>
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
29 * 2008-01-12 Tobias Lorenz <tobias.lorenz@gmx.net>
31 * - First working version
32 * 2008-01-13 Tobias Lorenz <tobias.lorenz@gmx.net>
34 * - Improved error handling, every function now returns errno
35 * - Improved multi user access (start/mute/stop)
36 * - Channel doesn't get lost anymore after start/mute/stop
37 * - RDS support added (polling mode via interrupt EP 1)
38 * - marked default module parameters with *value*
39 * - switched from bit structs to bit masks
40 * - header file cleaned and integrated
41 * 2008-01-14 Tobias Lorenz <tobias.lorenz@gmx.net>
43 * - hex values are now lower case
44 * - commented USB ID for ADS/Tech moved on todo list
45 * - blacklisted si470x in hid-quirks.c
46 * - rds buffer handling functions integrated into *_work, *_read
47 * - rds_command in si470x_poll exchanged against simple retval
48 * - check for firmware version 15
49 * - code order and prototypes still remain the same
50 * - spacing and bottom of band codes remain the same
51 * 2008-01-16 Tobias Lorenz <tobias.lorenz@gmx.net>
53 * - code reordered to avoid function prototypes
54 * - switch/case defaults are now more user-friendly
55 * - unified comment style
56 * - applied all checkpatch.pl v1.12 suggestions
57 * except the warning about the too long lines with bit comments
58 * - renamed FMRADIO to RADIO to cut line length (checkpatch.pl)
59 * 2008-01-22 Tobias Lorenz <tobias.lorenz@gmx.net>
61 * - avoid poss. locking when doing copy_to_user which may sleep
62 * - RDS is automatically activated on read now
63 * - code cleaned of unnecessary rds_commands
64 * - USB Vendor/Product ID for ADS/Tech FM Radio Receiver verified
65 * (thanks to Guillaume RAMOUSSE)
66 * 2008-01-27 Tobias Lorenz <tobias.lorenz@gmx.net>
68 * - number of seek_retries changed to tune_timeout
69 * - fixed problem with incomplete tune operations by own buffers
70 * - optimization of variables and printf types
71 * - improved error logging
72 * 2008-01-31 Tobias Lorenz <tobias.lorenz@gmx.net>
73 * Oliver Neukum <oliver@neukum.org>
75 * - fixed coverity checker warnings in *_usb_driver_disconnect
76 * - probe()/open() race by correct ordering in probe()
77 * - DMA coherency rules by separate allocation of all buffers
78 * - use of endianness macros
79 * - abuse of spinlock, replaced by mutex
80 * - racy handling of timer in disconnect,
81 * replaced by delayed_work
82 * - racy interruptible_sleep_on(),
83 * replaced with wait_event_interruptible()
84 * - handle signals in read()
85 * 2008-02-08 Tobias Lorenz <tobias.lorenz@gmx.net>
86 * Oliver Neukum <oliver@neukum.org>
88 * - usb autosuspend support
90 * 2008-05-07 Tobias Lorenz <tobias.lorenz@gmx.net>
92 * - hardware frequency seek support
94 * - more safety checks, let si470x_get_freq return errno
95 * - vidioc behavior corrected according to v4l2 spec
96 * 2008-10-20 Alexey Klimov <klimov.linux@gmail.com>
97 * - add support for KWorld USB FM Radio FM700
98 * - blacklisted KWorld radio in hid-core.c and hid-ids.h
101 * - add firmware download/update support
102 * - RDS support: interrupt mode, instead of polling
103 * - add LED status output (check if that's not already done in firmware)
107 /* driver definitions */
108 #define DRIVER_AUTHOR "Tobias Lorenz <tobias.lorenz@gmx.net>"
109 #define DRIVER_NAME "radio-si470x"
110 #define DRIVER_KERNEL_VERSION KERNEL_VERSION(1, 0, 8)
111 #define DRIVER_CARD "Silicon Labs Si470x FM Radio Receiver"
112 #define DRIVER_DESC "USB radio driver for Si470x FM Radio Receivers"
113 #define DRIVER_VERSION "1.0.8"
116 /* kernel includes */
117 #include <linux/kernel.h>
118 #include <linux/module.h>
119 #include <linux/init.h>
120 #include <linux/slab.h>
121 #include <linux/input.h>
122 #include <linux/usb.h>
123 #include <linux/hid.h>
124 #include <linux/version.h>
125 #include <linux/videodev2.h>
126 #include <linux/mutex.h>
127 #include <media/v4l2-common.h>
128 #include <media/v4l2-ioctl.h>
129 #include <media/rds.h>
130 #include <asm/unaligned.h>
133 /* USB Device ID List */
134 static struct usb_device_id si470x_usb_driver_id_table
[] = {
135 /* Silicon Labs USB FM Radio Reference Design */
136 { USB_DEVICE_AND_INTERFACE_INFO(0x10c4, 0x818a, USB_CLASS_HID
, 0, 0) },
137 /* ADS/Tech FM Radio Receiver (formerly Instant FM Music) */
138 { USB_DEVICE_AND_INTERFACE_INFO(0x06e1, 0xa155, USB_CLASS_HID
, 0, 0) },
139 /* KWorld USB FM Radio SnapMusic Mobile 700 (FM700) */
140 { USB_DEVICE_AND_INTERFACE_INFO(0x1b80, 0xd700, USB_CLASS_HID
, 0, 0) },
141 /* Terminating entry */
144 MODULE_DEVICE_TABLE(usb
, si470x_usb_driver_id_table
);
148 /**************************************************************************
150 **************************************************************************/
153 static int radio_nr
= -1;
154 module_param(radio_nr
, int, 0444);
155 MODULE_PARM_DESC(radio_nr
, "Radio Nr");
158 /* 0: 200 kHz (USA, Australia) */
159 /* 1: 100 kHz (Europe, Japan) */
161 static unsigned short space
= 2;
162 module_param(space
, ushort
, 0444);
163 MODULE_PARM_DESC(space
, "Spacing: 0=200kHz 1=100kHz *2=50kHz*");
165 /* Bottom of Band (MHz) */
166 /* 0: 87.5 - 108 MHz (USA, Europe)*/
167 /* 1: 76 - 108 MHz (Japan wide band) */
168 /* 2: 76 - 90 MHz (Japan) */
169 static unsigned short band
= 1;
170 module_param(band
, ushort
, 0444);
171 MODULE_PARM_DESC(band
, "Band: 0=87.5..108MHz *1=76..108MHz* 2=76..90MHz");
175 /* 1: 50 us (Europe, Australia, Japan) */
176 static unsigned short de
= 1;
177 module_param(de
, ushort
, 0444);
178 MODULE_PARM_DESC(de
, "De-emphasis: 0=75us *1=50us*");
181 static unsigned int usb_timeout
= 500;
182 module_param(usb_timeout
, uint
, 0644);
183 MODULE_PARM_DESC(usb_timeout
, "USB timeout (ms): *500*");
186 static unsigned int tune_timeout
= 3000;
187 module_param(tune_timeout
, uint
, 0644);
188 MODULE_PARM_DESC(tune_timeout
, "Tune timeout: *3000*");
191 static unsigned int seek_timeout
= 5000;
192 module_param(seek_timeout
, uint
, 0644);
193 MODULE_PARM_DESC(seek_timeout
, "Seek timeout: *5000*");
195 /* RDS buffer blocks */
196 static unsigned int rds_buf
= 100;
197 module_param(rds_buf
, uint
, 0444);
198 MODULE_PARM_DESC(rds_buf
, "RDS buffer entries: *100*");
200 /* RDS maximum block errors */
201 static unsigned short max_rds_errors
= 1;
202 /* 0 means 0 errors requiring correction */
203 /* 1 means 1-2 errors requiring correction (used by original USBRadio.exe) */
204 /* 2 means 3-5 errors requiring correction */
205 /* 3 means 6+ errors or errors in checkword, correction not possible */
206 module_param(max_rds_errors
, ushort
, 0644);
207 MODULE_PARM_DESC(max_rds_errors
, "RDS maximum block errors: *1*");
209 /* RDS poll frequency */
210 static unsigned int rds_poll_time
= 40;
211 /* 40 is used by the original USBRadio.exe */
212 /* 50 is used by radio-cadet */
213 /* 75 should be okay */
214 /* 80 is the usual RDS receive interval */
215 module_param(rds_poll_time
, uint
, 0644);
216 MODULE_PARM_DESC(rds_poll_time
, "RDS poll time (ms): *40*");
220 /**************************************************************************
221 * Register Definitions
222 **************************************************************************/
223 #define RADIO_REGISTER_SIZE 2 /* 16 register bit width */
224 #define RADIO_REGISTER_NUM 16 /* DEVICEID ... RDSD */
225 #define RDS_REGISTER_NUM 6 /* STATUSRSSI ... RDSD */
227 #define DEVICEID 0 /* Device ID */
228 #define DEVICEID_PN 0xf000 /* bits 15..12: Part Number */
229 #define DEVICEID_MFGID 0x0fff /* bits 11..00: Manufacturer ID */
231 #define CHIPID 1 /* Chip ID */
232 #define CHIPID_REV 0xfc00 /* bits 15..10: Chip Version */
233 #define CHIPID_DEV 0x0200 /* bits 09..09: Device */
234 #define CHIPID_FIRMWARE 0x01ff /* bits 08..00: Firmware Version */
236 #define POWERCFG 2 /* Power Configuration */
237 #define POWERCFG_DSMUTE 0x8000 /* bits 15..15: Softmute Disable */
238 #define POWERCFG_DMUTE 0x4000 /* bits 14..14: Mute Disable */
239 #define POWERCFG_MONO 0x2000 /* bits 13..13: Mono Select */
240 #define POWERCFG_RDSM 0x0800 /* bits 11..11: RDS Mode (Si4701 only) */
241 #define POWERCFG_SKMODE 0x0400 /* bits 10..10: Seek Mode */
242 #define POWERCFG_SEEKUP 0x0200 /* bits 09..09: Seek Direction */
243 #define POWERCFG_SEEK 0x0100 /* bits 08..08: Seek */
244 #define POWERCFG_DISABLE 0x0040 /* bits 06..06: Powerup Disable */
245 #define POWERCFG_ENABLE 0x0001 /* bits 00..00: Powerup Enable */
247 #define CHANNEL 3 /* Channel */
248 #define CHANNEL_TUNE 0x8000 /* bits 15..15: Tune */
249 #define CHANNEL_CHAN 0x03ff /* bits 09..00: Channel Select */
251 #define SYSCONFIG1 4 /* System Configuration 1 */
252 #define SYSCONFIG1_RDSIEN 0x8000 /* bits 15..15: RDS Interrupt Enable (Si4701 only) */
253 #define SYSCONFIG1_STCIEN 0x4000 /* bits 14..14: Seek/Tune Complete Interrupt Enable */
254 #define SYSCONFIG1_RDS 0x1000 /* bits 12..12: RDS Enable (Si4701 only) */
255 #define SYSCONFIG1_DE 0x0800 /* bits 11..11: De-emphasis (0=75us 1=50us) */
256 #define SYSCONFIG1_AGCD 0x0400 /* bits 10..10: AGC Disable */
257 #define SYSCONFIG1_BLNDADJ 0x00c0 /* bits 07..06: Stereo/Mono Blend Level Adjustment */
258 #define SYSCONFIG1_GPIO3 0x0030 /* bits 05..04: General Purpose I/O 3 */
259 #define SYSCONFIG1_GPIO2 0x000c /* bits 03..02: General Purpose I/O 2 */
260 #define SYSCONFIG1_GPIO1 0x0003 /* bits 01..00: General Purpose I/O 1 */
262 #define SYSCONFIG2 5 /* System Configuration 2 */
263 #define SYSCONFIG2_SEEKTH 0xff00 /* bits 15..08: RSSI Seek Threshold */
264 #define SYSCONFIG2_BAND 0x0080 /* bits 07..06: Band Select */
265 #define SYSCONFIG2_SPACE 0x0030 /* bits 05..04: Channel Spacing */
266 #define SYSCONFIG2_VOLUME 0x000f /* bits 03..00: Volume */
268 #define SYSCONFIG3 6 /* System Configuration 3 */
269 #define SYSCONFIG3_SMUTER 0xc000 /* bits 15..14: Softmute Attack/Recover Rate */
270 #define SYSCONFIG3_SMUTEA 0x3000 /* bits 13..12: Softmute Attenuation */
271 #define SYSCONFIG3_SKSNR 0x00f0 /* bits 07..04: Seek SNR Threshold */
272 #define SYSCONFIG3_SKCNT 0x000f /* bits 03..00: Seek FM Impulse Detection Threshold */
274 #define TEST1 7 /* Test 1 */
275 #define TEST1_AHIZEN 0x4000 /* bits 14..14: Audio High-Z Enable */
277 #define TEST2 8 /* Test 2 */
278 /* TEST2 only contains reserved bits */
280 #define BOOTCONFIG 9 /* Boot Configuration */
281 /* BOOTCONFIG only contains reserved bits */
283 #define STATUSRSSI 10 /* Status RSSI */
284 #define STATUSRSSI_RDSR 0x8000 /* bits 15..15: RDS Ready (Si4701 only) */
285 #define STATUSRSSI_STC 0x4000 /* bits 14..14: Seek/Tune Complete */
286 #define STATUSRSSI_SF 0x2000 /* bits 13..13: Seek Fail/Band Limit */
287 #define STATUSRSSI_AFCRL 0x1000 /* bits 12..12: AFC Rail */
288 #define STATUSRSSI_RDSS 0x0800 /* bits 11..11: RDS Synchronized (Si4701 only) */
289 #define STATUSRSSI_BLERA 0x0600 /* bits 10..09: RDS Block A Errors (Si4701 only) */
290 #define STATUSRSSI_ST 0x0100 /* bits 08..08: Stereo Indicator */
291 #define STATUSRSSI_RSSI 0x00ff /* bits 07..00: RSSI (Received Signal Strength Indicator) */
293 #define READCHAN 11 /* Read Channel */
294 #define READCHAN_BLERB 0xc000 /* bits 15..14: RDS Block D Errors (Si4701 only) */
295 #define READCHAN_BLERC 0x3000 /* bits 13..12: RDS Block C Errors (Si4701 only) */
296 #define READCHAN_BLERD 0x0c00 /* bits 11..10: RDS Block B Errors (Si4701 only) */
297 #define READCHAN_READCHAN 0x03ff /* bits 09..00: Read Channel */
299 #define RDSA 12 /* RDSA */
300 #define RDSA_RDSA 0xffff /* bits 15..00: RDS Block A Data (Si4701 only) */
302 #define RDSB 13 /* RDSB */
303 #define RDSB_RDSB 0xffff /* bits 15..00: RDS Block B Data (Si4701 only) */
305 #define RDSC 14 /* RDSC */
306 #define RDSC_RDSC 0xffff /* bits 15..00: RDS Block C Data (Si4701 only) */
308 #define RDSD 15 /* RDSD */
309 #define RDSD_RDSD 0xffff /* bits 15..00: RDS Block D Data (Si4701 only) */
313 /**************************************************************************
315 **************************************************************************/
317 /* Reports 1-16 give direct read/write access to the 16 Si470x registers */
318 /* with the (REPORT_ID - 1) corresponding to the register address across USB */
319 /* endpoint 0 using GET_REPORT and SET_REPORT */
320 #define REGISTER_REPORT_SIZE (RADIO_REGISTER_SIZE + 1)
321 #define REGISTER_REPORT(reg) ((reg) + 1)
323 /* Report 17 gives direct read/write access to the entire Si470x register */
324 /* map across endpoint 0 using GET_REPORT and SET_REPORT */
325 #define ENTIRE_REPORT_SIZE (RADIO_REGISTER_NUM * RADIO_REGISTER_SIZE + 1)
326 #define ENTIRE_REPORT 17
328 /* Report 18 is used to send the lowest 6 Si470x registers up the HID */
329 /* interrupt endpoint 1 to Windows every 20 milliseconds for status */
330 #define RDS_REPORT_SIZE (RDS_REGISTER_NUM * RADIO_REGISTER_SIZE + 1)
331 #define RDS_REPORT 18
333 /* Report 19: LED state */
334 #define LED_REPORT_SIZE 3
335 #define LED_REPORT 19
337 /* Report 19: stream */
338 #define STREAM_REPORT_SIZE 3
339 #define STREAM_REPORT 19
341 /* Report 20: scratch */
342 #define SCRATCH_PAGE_SIZE 63
343 #define SCRATCH_REPORT_SIZE (SCRATCH_PAGE_SIZE + 1)
344 #define SCRATCH_REPORT 20
346 /* Reports 19-22: flash upgrade of the C8051F321 */
347 #define WRITE_REPORT 19
348 #define FLASH_REPORT 20
349 #define CRC_REPORT 21
350 #define RESPONSE_REPORT 22
352 /* Report 23: currently unused, but can accept 60 byte reports on the HID */
353 /* interrupt out endpoint 2 every 1 millisecond */
354 #define UNUSED_REPORT 23
358 /**************************************************************************
359 * Software/Hardware Versions
360 **************************************************************************/
361 #define RADIO_SW_VERSION_NOT_BOOTLOADABLE 6
362 #define RADIO_SW_VERSION 7
363 #define RADIO_SW_VERSION_CURRENT 15
364 #define RADIO_HW_VERSION 1
366 #define SCRATCH_PAGE_SW_VERSION 1
367 #define SCRATCH_PAGE_HW_VERSION 2
371 /**************************************************************************
372 * LED State Definitions
373 **************************************************************************/
374 #define LED_COMMAND 0x35
376 #define NO_CHANGE_LED 0x00
377 #define ALL_COLOR_LED 0x01 /* streaming state */
378 #define BLINK_GREEN_LED 0x02 /* connect state */
379 #define BLINK_RED_LED 0x04
380 #define BLINK_ORANGE_LED 0x10 /* disconnect state */
381 #define SOLID_GREEN_LED 0x20 /* tuning/seeking state */
382 #define SOLID_RED_LED 0x40 /* bootload state */
383 #define SOLID_ORANGE_LED 0x80
387 /**************************************************************************
388 * Stream State Definitions
389 **************************************************************************/
390 #define STREAM_COMMAND 0x36
391 #define STREAM_VIDPID 0x00
392 #define STREAM_AUDIO 0xff
396 /**************************************************************************
397 * Bootloader / Flash Commands
398 **************************************************************************/
400 /* unique id sent to bootloader and required to put into a bootload state */
401 #define UNIQUE_BL_ID 0x34
403 /* mask for the flash data */
404 #define FLASH_DATA_MASK 0x55
406 /* bootloader commands */
407 #define GET_SW_VERSION_COMMAND 0x00
408 #define SET_PAGE_COMMAND 0x01
409 #define ERASE_PAGE_COMMAND 0x02
410 #define WRITE_PAGE_COMMAND 0x03
411 #define CRC_ON_PAGE_COMMAND 0x04
412 #define READ_FLASH_BYTE_COMMAND 0x05
413 #define RESET_DEVICE_COMMAND 0x06
414 #define GET_HW_VERSION_COMMAND 0x07
417 /* bootloader command responses */
418 #define COMMAND_OK 0x01
419 #define COMMAND_FAILED 0x02
420 #define COMMAND_PENDING 0x03
423 #define COMMAND_BUFFER_SIZE 4
424 #define RESPONSE_BUFFER_SIZE 2
425 #define FLASH_BUFFER_SIZE 64
426 #define CRC_BUFFER_SIZE 3
430 /**************************************************************************
431 * General Driver Definitions
432 **************************************************************************/
435 * si470x_device - private data
437 struct si470x_device
{
438 /* reference to USB and video device */
439 struct usb_device
*usbdev
;
440 struct usb_interface
*intf
;
441 struct video_device
*videodev
;
443 /* driver management */
445 unsigned char disconnected
;
446 struct mutex disconnect_lock
;
448 /* Silabs internal registers (0..15) */
449 unsigned short registers
[RADIO_REGISTER_NUM
];
451 /* RDS receive buffer */
452 struct delayed_work work
;
453 wait_queue_head_t read_queue
;
454 struct mutex lock
; /* buffer locking */
455 unsigned char *buffer
; /* size is always multiple of three */
456 unsigned int buf_size
;
457 unsigned int rd_index
;
458 unsigned int wr_index
;
463 * The frequency is set in units of 62.5 Hz when using V4L2_TUNER_CAP_LOW,
464 * 62.5 kHz otherwise.
465 * The tuner is able to have a channel spacing of 50, 100 or 200 kHz.
466 * tuner->capability is therefore set to V4L2_TUNER_CAP_LOW
467 * The FREQ_MUL is then: 1 MHz / 62.5 Hz = 16000
469 #define FREQ_MUL (1000000 / 62.5)
473 /**************************************************************************
474 * General Driver Functions
475 **************************************************************************/
478 * si470x_get_report - receive a HID report
480 static int si470x_get_report(struct si470x_device
*radio
, void *buf
, int size
)
482 unsigned char *report
= (unsigned char *) buf
;
485 retval
= usb_control_msg(radio
->usbdev
,
486 usb_rcvctrlpipe(radio
->usbdev
, 0),
488 USB_TYPE_CLASS
| USB_RECIP_INTERFACE
| USB_DIR_IN
,
490 buf
, size
, usb_timeout
);
493 printk(KERN_WARNING DRIVER_NAME
494 ": si470x_get_report: usb_control_msg returned %d\n",
501 * si470x_set_report - send a HID report
503 static int si470x_set_report(struct si470x_device
*radio
, void *buf
, int size
)
505 unsigned char *report
= (unsigned char *) buf
;
508 retval
= usb_control_msg(radio
->usbdev
,
509 usb_sndctrlpipe(radio
->usbdev
, 0),
511 USB_TYPE_CLASS
| USB_RECIP_INTERFACE
| USB_DIR_OUT
,
513 buf
, size
, usb_timeout
);
516 printk(KERN_WARNING DRIVER_NAME
517 ": si470x_set_report: usb_control_msg returned %d\n",
524 * si470x_get_register - read register
526 static int si470x_get_register(struct si470x_device
*radio
, int regnr
)
528 unsigned char buf
[REGISTER_REPORT_SIZE
];
531 buf
[0] = REGISTER_REPORT(regnr
);
533 retval
= si470x_get_report(radio
, (void *) &buf
, sizeof(buf
));
536 radio
->registers
[regnr
] = get_unaligned_be16(&buf
[1]);
538 return (retval
< 0) ? -EINVAL
: 0;
543 * si470x_set_register - write register
545 static int si470x_set_register(struct si470x_device
*radio
, int regnr
)
547 unsigned char buf
[REGISTER_REPORT_SIZE
];
550 buf
[0] = REGISTER_REPORT(regnr
);
551 put_unaligned_be16(radio
->registers
[regnr
], &buf
[1]);
553 retval
= si470x_set_report(radio
, (void *) &buf
, sizeof(buf
));
555 return (retval
< 0) ? -EINVAL
: 0;
560 * si470x_get_all_registers - read entire registers
562 static int si470x_get_all_registers(struct si470x_device
*radio
)
564 unsigned char buf
[ENTIRE_REPORT_SIZE
];
568 buf
[0] = ENTIRE_REPORT
;
570 retval
= si470x_get_report(radio
, (void *) &buf
, sizeof(buf
));
573 for (regnr
= 0; regnr
< RADIO_REGISTER_NUM
; regnr
++)
574 radio
->registers
[regnr
] = get_unaligned_be16(
575 &buf
[regnr
* RADIO_REGISTER_SIZE
+ 1]);
577 return (retval
< 0) ? -EINVAL
: 0;
582 * si470x_get_rds_registers - read rds registers
584 static int si470x_get_rds_registers(struct si470x_device
*radio
)
586 unsigned char buf
[RDS_REPORT_SIZE
];
593 retval
= usb_interrupt_msg(radio
->usbdev
,
594 usb_rcvintpipe(radio
->usbdev
, 1),
595 (void *) &buf
, sizeof(buf
), &size
, usb_timeout
);
596 if (size
!= sizeof(buf
))
597 printk(KERN_WARNING DRIVER_NAME
": si470x_get_rds_registers: "
598 "return size differs: %d != %zu\n", size
, sizeof(buf
));
600 printk(KERN_WARNING DRIVER_NAME
": si470x_get_rds_registers: "
601 "usb_interrupt_msg returned %d\n", retval
);
604 for (regnr
= 0; regnr
< RDS_REGISTER_NUM
; regnr
++)
605 radio
->registers
[STATUSRSSI
+ regnr
] =
607 &buf
[regnr
* RADIO_REGISTER_SIZE
+ 1]);
609 return (retval
< 0) ? -EINVAL
: 0;
614 * si470x_set_chan - set the channel
616 static int si470x_set_chan(struct si470x_device
*radio
, unsigned short chan
)
619 unsigned long timeout
;
623 radio
->registers
[CHANNEL
] &= ~CHANNEL_CHAN
;
624 radio
->registers
[CHANNEL
] |= CHANNEL_TUNE
| chan
;
625 retval
= si470x_set_register(radio
, CHANNEL
);
629 /* wait till tune operation has completed */
630 timeout
= jiffies
+ msecs_to_jiffies(tune_timeout
);
632 retval
= si470x_get_register(radio
, STATUSRSSI
);
635 timed_out
= time_after(jiffies
, timeout
);
636 } while (((radio
->registers
[STATUSRSSI
] & STATUSRSSI_STC
) == 0) &&
638 if ((radio
->registers
[STATUSRSSI
] & STATUSRSSI_STC
) == 0)
639 printk(KERN_WARNING DRIVER_NAME
": tune does not complete\n");
641 printk(KERN_WARNING DRIVER_NAME
642 ": tune timed out after %u ms\n", tune_timeout
);
646 radio
->registers
[CHANNEL
] &= ~CHANNEL_TUNE
;
647 retval
= si470x_set_register(radio
, CHANNEL
);
655 * si470x_get_freq - get the frequency
657 static int si470x_get_freq(struct si470x_device
*radio
, unsigned int *freq
)
659 unsigned int spacing
, band_bottom
;
664 switch ((radio
->registers
[SYSCONFIG2
] & SYSCONFIG2_SPACE
) >> 4) {
665 /* 0: 200 kHz (USA, Australia) */
667 spacing
= 0.200 * FREQ_MUL
; break;
668 /* 1: 100 kHz (Europe, Japan) */
670 spacing
= 0.100 * FREQ_MUL
; break;
673 spacing
= 0.050 * FREQ_MUL
; break;
676 /* Bottom of Band (MHz) */
677 switch ((radio
->registers
[SYSCONFIG2
] & SYSCONFIG2_BAND
) >> 6) {
678 /* 0: 87.5 - 108 MHz (USA, Europe) */
680 band_bottom
= 87.5 * FREQ_MUL
; break;
681 /* 1: 76 - 108 MHz (Japan wide band) */
683 band_bottom
= 76 * FREQ_MUL
; break;
684 /* 2: 76 - 90 MHz (Japan) */
686 band_bottom
= 76 * FREQ_MUL
; break;
690 retval
= si470x_get_register(radio
, READCHAN
);
691 chan
= radio
->registers
[READCHAN
] & READCHAN_READCHAN
;
693 /* Frequency (MHz) = Spacing (kHz) x Channel + Bottom of Band (MHz) */
694 *freq
= chan
* spacing
+ band_bottom
;
701 * si470x_set_freq - set the frequency
703 static int si470x_set_freq(struct si470x_device
*radio
, unsigned int freq
)
705 unsigned int spacing
, band_bottom
;
709 switch ((radio
->registers
[SYSCONFIG2
] & SYSCONFIG2_SPACE
) >> 4) {
710 /* 0: 200 kHz (USA, Australia) */
712 spacing
= 0.200 * FREQ_MUL
; break;
713 /* 1: 100 kHz (Europe, Japan) */
715 spacing
= 0.100 * FREQ_MUL
; break;
718 spacing
= 0.050 * FREQ_MUL
; break;
721 /* Bottom of Band (MHz) */
722 switch ((radio
->registers
[SYSCONFIG2
] & SYSCONFIG2_BAND
) >> 6) {
723 /* 0: 87.5 - 108 MHz (USA, Europe) */
725 band_bottom
= 87.5 * FREQ_MUL
; break;
726 /* 1: 76 - 108 MHz (Japan wide band) */
728 band_bottom
= 76 * FREQ_MUL
; break;
729 /* 2: 76 - 90 MHz (Japan) */
731 band_bottom
= 76 * FREQ_MUL
; break;
734 /* Chan = [ Freq (Mhz) - Bottom of Band (MHz) ] / Spacing (kHz) */
735 chan
= (freq
- band_bottom
) / spacing
;
737 return si470x_set_chan(radio
, chan
);
742 * si470x_set_seek - set seek
744 static int si470x_set_seek(struct si470x_device
*radio
,
745 unsigned int wrap_around
, unsigned int seek_upward
)
748 unsigned long timeout
;
752 radio
->registers
[POWERCFG
] |= POWERCFG_SEEK
;
753 if (wrap_around
== 1)
754 radio
->registers
[POWERCFG
] &= ~POWERCFG_SKMODE
;
756 radio
->registers
[POWERCFG
] |= POWERCFG_SKMODE
;
757 if (seek_upward
== 1)
758 radio
->registers
[POWERCFG
] |= POWERCFG_SEEKUP
;
760 radio
->registers
[POWERCFG
] &= ~POWERCFG_SEEKUP
;
761 retval
= si470x_set_register(radio
, POWERCFG
);
765 /* wait till seek operation has completed */
766 timeout
= jiffies
+ msecs_to_jiffies(seek_timeout
);
768 retval
= si470x_get_register(radio
, STATUSRSSI
);
771 timed_out
= time_after(jiffies
, timeout
);
772 } while (((radio
->registers
[STATUSRSSI
] & STATUSRSSI_STC
) == 0) &&
774 if ((radio
->registers
[STATUSRSSI
] & STATUSRSSI_STC
) == 0)
775 printk(KERN_WARNING DRIVER_NAME
": seek does not complete\n");
776 if (radio
->registers
[STATUSRSSI
] & STATUSRSSI_SF
)
777 printk(KERN_WARNING DRIVER_NAME
778 ": seek failed / band limit reached\n");
780 printk(KERN_WARNING DRIVER_NAME
781 ": seek timed out after %u ms\n", seek_timeout
);
785 radio
->registers
[POWERCFG
] &= ~POWERCFG_SEEK
;
786 retval
= si470x_set_register(radio
, POWERCFG
);
789 /* try again, if timed out */
790 if ((retval
== 0) && timed_out
)
798 * si470x_start - switch on radio
800 static int si470x_start(struct si470x_device
*radio
)
805 radio
->registers
[POWERCFG
] =
806 POWERCFG_DMUTE
| POWERCFG_ENABLE
| POWERCFG_RDSM
;
807 retval
= si470x_set_register(radio
, POWERCFG
);
812 radio
->registers
[SYSCONFIG1
] = SYSCONFIG1_DE
;
813 retval
= si470x_set_register(radio
, SYSCONFIG1
);
818 radio
->registers
[SYSCONFIG2
] =
819 (0x3f << 8) | /* SEEKTH */
820 ((band
<< 6) & SYSCONFIG2_BAND
) | /* BAND */
821 ((space
<< 4) & SYSCONFIG2_SPACE
) | /* SPACE */
822 15; /* VOLUME (max) */
823 retval
= si470x_set_register(radio
, SYSCONFIG2
);
827 /* reset last channel */
828 retval
= si470x_set_chan(radio
,
829 radio
->registers
[CHANNEL
] & CHANNEL_CHAN
);
837 * si470x_stop - switch off radio
839 static int si470x_stop(struct si470x_device
*radio
)
844 radio
->registers
[SYSCONFIG1
] &= ~SYSCONFIG1_RDS
;
845 retval
= si470x_set_register(radio
, SYSCONFIG1
);
850 radio
->registers
[POWERCFG
] &= ~POWERCFG_DMUTE
;
851 /* POWERCFG_ENABLE has to automatically go low */
852 radio
->registers
[POWERCFG
] |= POWERCFG_ENABLE
| POWERCFG_DISABLE
;
853 retval
= si470x_set_register(radio
, POWERCFG
);
861 * si470x_rds_on - switch on rds reception
863 static int si470x_rds_on(struct si470x_device
*radio
)
868 mutex_lock(&radio
->lock
);
869 radio
->registers
[SYSCONFIG1
] |= SYSCONFIG1_RDS
;
870 retval
= si470x_set_register(radio
, SYSCONFIG1
);
872 radio
->registers
[SYSCONFIG1
] &= ~SYSCONFIG1_RDS
;
873 mutex_unlock(&radio
->lock
);
880 /**************************************************************************
881 * RDS Driver Functions
882 **************************************************************************/
885 * si470x_rds - rds processing function
887 static void si470x_rds(struct si470x_device
*radio
)
889 unsigned char blocknum
;
890 unsigned short bler
; /* rds block errors */
892 unsigned char tmpbuf
[3];
895 if (si470x_get_rds_registers(radio
) < 0)
897 if ((radio
->registers
[STATUSRSSI
] & STATUSRSSI_RDSR
) == 0) {
898 /* No RDS group ready */
901 if ((radio
->registers
[STATUSRSSI
] & STATUSRSSI_RDSS
) == 0) {
902 /* RDS decoder not synchronized */
906 /* copy all four RDS blocks to internal buffer */
907 mutex_lock(&radio
->lock
);
908 for (blocknum
= 0; blocknum
< 4; blocknum
++) {
911 bler
= (radio
->registers
[STATUSRSSI
] &
912 STATUSRSSI_BLERA
) >> 9;
913 rds
= radio
->registers
[RDSA
];
916 bler
= (radio
->registers
[READCHAN
] &
917 READCHAN_BLERB
) >> 14;
918 rds
= radio
->registers
[RDSB
];
921 bler
= (radio
->registers
[READCHAN
] &
922 READCHAN_BLERC
) >> 12;
923 rds
= radio
->registers
[RDSC
];
926 bler
= (radio
->registers
[READCHAN
] &
927 READCHAN_BLERD
) >> 10;
928 rds
= radio
->registers
[RDSD
];
932 /* Fill the V4L2 RDS buffer */
933 put_unaligned_le16(rds
, &tmpbuf
);
934 tmpbuf
[2] = blocknum
; /* offset name */
935 tmpbuf
[2] |= blocknum
<< 3; /* received offset */
936 if (bler
> max_rds_errors
)
937 tmpbuf
[2] |= 0x80; /* uncorrectable errors */
939 tmpbuf
[2] |= 0x40; /* corrected error(s) */
941 /* copy RDS block to internal buffer */
942 memcpy(&radio
->buffer
[radio
->wr_index
], &tmpbuf
, 3);
943 radio
->wr_index
+= 3;
945 /* wrap write pointer */
946 if (radio
->wr_index
>= radio
->buf_size
)
949 /* check for overflow */
950 if (radio
->wr_index
== radio
->rd_index
) {
951 /* increment and wrap read pointer */
952 radio
->rd_index
+= 3;
953 if (radio
->rd_index
>= radio
->buf_size
)
957 mutex_unlock(&radio
->lock
);
959 /* wake up read queue */
960 if (radio
->wr_index
!= radio
->rd_index
)
961 wake_up_interruptible(&radio
->read_queue
);
966 * si470x_work - rds work function
968 static void si470x_work(struct work_struct
*work
)
970 struct si470x_device
*radio
= container_of(work
, struct si470x_device
,
974 if (radio
->disconnected
)
976 if ((radio
->registers
[SYSCONFIG1
] & SYSCONFIG1_RDS
) == 0)
980 schedule_delayed_work(&radio
->work
, msecs_to_jiffies(rds_poll_time
));
985 /**************************************************************************
986 * File Operations Interface
987 **************************************************************************/
990 * si470x_fops_read - read RDS data
992 static ssize_t
si470x_fops_read(struct file
*file
, char __user
*buf
,
993 size_t count
, loff_t
*ppos
)
995 struct si470x_device
*radio
= video_drvdata(file
);
997 unsigned int block_count
= 0;
999 /* switch on rds reception */
1000 if ((radio
->registers
[SYSCONFIG1
] & SYSCONFIG1_RDS
) == 0) {
1001 si470x_rds_on(radio
);
1002 schedule_delayed_work(&radio
->work
,
1003 msecs_to_jiffies(rds_poll_time
));
1006 /* block if no new data available */
1007 while (radio
->wr_index
== radio
->rd_index
) {
1008 if (file
->f_flags
& O_NONBLOCK
) {
1009 retval
= -EWOULDBLOCK
;
1012 if (wait_event_interruptible(radio
->read_queue
,
1013 radio
->wr_index
!= radio
->rd_index
) < 0) {
1019 /* calculate block count from byte count */
1022 /* copy RDS block out of internal buffer and to user buffer */
1023 mutex_lock(&radio
->lock
);
1024 while (block_count
< count
) {
1025 if (radio
->rd_index
== radio
->wr_index
)
1028 /* always transfer rds complete blocks */
1029 if (copy_to_user(buf
, &radio
->buffer
[radio
->rd_index
], 3))
1030 /* retval = -EFAULT; */
1033 /* increment and wrap read pointer */
1034 radio
->rd_index
+= 3;
1035 if (radio
->rd_index
>= radio
->buf_size
)
1036 radio
->rd_index
= 0;
1038 /* increment counters */
1043 mutex_unlock(&radio
->lock
);
1051 * si470x_fops_poll - poll RDS data
1053 static unsigned int si470x_fops_poll(struct file
*file
,
1054 struct poll_table_struct
*pts
)
1056 struct si470x_device
*radio
= video_drvdata(file
);
1059 /* switch on rds reception */
1060 if ((radio
->registers
[SYSCONFIG1
] & SYSCONFIG1_RDS
) == 0) {
1061 si470x_rds_on(radio
);
1062 schedule_delayed_work(&radio
->work
,
1063 msecs_to_jiffies(rds_poll_time
));
1066 poll_wait(file
, &radio
->read_queue
, pts
);
1068 if (radio
->rd_index
!= radio
->wr_index
)
1069 retval
= POLLIN
| POLLRDNORM
;
1076 * si470x_fops_open - file open
1078 static int si470x_fops_open(struct file
*file
)
1080 struct si470x_device
*radio
= video_drvdata(file
);
1086 retval
= usb_autopm_get_interface(radio
->intf
);
1093 if (radio
->users
== 1) {
1094 retval
= si470x_start(radio
);
1096 usb_autopm_put_interface(radio
->intf
);
1106 * si470x_fops_release - file release
1108 static int si470x_fops_release(struct file
*file
)
1110 struct si470x_device
*radio
= video_drvdata(file
);
1119 mutex_lock(&radio
->disconnect_lock
);
1121 if (radio
->users
== 0) {
1122 if (radio
->disconnected
) {
1123 video_unregister_device(radio
->videodev
);
1124 kfree(radio
->buffer
);
1129 /* stop rds reception */
1130 cancel_delayed_work_sync(&radio
->work
);
1132 /* cancel read processes */
1133 wake_up_interruptible(&radio
->read_queue
);
1135 retval
= si470x_stop(radio
);
1136 usb_autopm_put_interface(radio
->intf
);
1140 mutex_unlock(&radio
->disconnect_lock
);
1148 * si470x_fops - file operations interface
1150 static const struct v4l2_file_operations si470x_fops
= {
1151 .owner
= THIS_MODULE
,
1152 .read
= si470x_fops_read
,
1153 .poll
= si470x_fops_poll
,
1154 .ioctl
= video_ioctl2
,
1155 .open
= si470x_fops_open
,
1156 .release
= si470x_fops_release
,
1161 /**************************************************************************
1162 * Video4Linux Interface
1163 **************************************************************************/
1166 * si470x_v4l2_queryctrl - query control
1168 static struct v4l2_queryctrl si470x_v4l2_queryctrl
[] = {
1170 .id
= V4L2_CID_AUDIO_VOLUME
,
1171 .type
= V4L2_CTRL_TYPE_INTEGER
,
1176 .default_value
= 15,
1179 .id
= V4L2_CID_AUDIO_MUTE
,
1180 .type
= V4L2_CTRL_TYPE_BOOLEAN
,
1191 * si470x_vidioc_querycap - query device capabilities
1193 static int si470x_vidioc_querycap(struct file
*file
, void *priv
,
1194 struct v4l2_capability
*capability
)
1196 strlcpy(capability
->driver
, DRIVER_NAME
, sizeof(capability
->driver
));
1197 strlcpy(capability
->card
, DRIVER_CARD
, sizeof(capability
->card
));
1198 sprintf(capability
->bus_info
, "USB");
1199 capability
->version
= DRIVER_KERNEL_VERSION
;
1200 capability
->capabilities
= V4L2_CAP_HW_FREQ_SEEK
|
1201 V4L2_CAP_TUNER
| V4L2_CAP_RADIO
;
1208 * si470x_vidioc_queryctrl - enumerate control items
1210 static int si470x_vidioc_queryctrl(struct file
*file
, void *priv
,
1211 struct v4l2_queryctrl
*qc
)
1213 unsigned char i
= 0;
1214 int retval
= -EINVAL
;
1216 /* abort if qc->id is below V4L2_CID_BASE */
1217 if (qc
->id
< V4L2_CID_BASE
)
1220 /* search video control */
1221 for (i
= 0; i
< ARRAY_SIZE(si470x_v4l2_queryctrl
); i
++) {
1222 if (qc
->id
== si470x_v4l2_queryctrl
[i
].id
) {
1223 memcpy(qc
, &(si470x_v4l2_queryctrl
[i
]), sizeof(*qc
));
1224 retval
= 0; /* found */
1229 /* disable unsupported base controls */
1230 /* to satisfy kradio and such apps */
1231 if ((retval
== -EINVAL
) && (qc
->id
< V4L2_CID_LASTP1
)) {
1232 qc
->flags
= V4L2_CTRL_FLAG_DISABLED
;
1238 printk(KERN_WARNING DRIVER_NAME
1239 ": query controls failed with %d\n", retval
);
1245 * si470x_vidioc_g_ctrl - get the value of a control
1247 static int si470x_vidioc_g_ctrl(struct file
*file
, void *priv
,
1248 struct v4l2_control
*ctrl
)
1250 struct si470x_device
*radio
= video_drvdata(file
);
1254 if (radio
->disconnected
) {
1260 case V4L2_CID_AUDIO_VOLUME
:
1261 ctrl
->value
= radio
->registers
[SYSCONFIG2
] &
1264 case V4L2_CID_AUDIO_MUTE
:
1265 ctrl
->value
= ((radio
->registers
[POWERCFG
] &
1266 POWERCFG_DMUTE
) == 0) ? 1 : 0;
1274 printk(KERN_WARNING DRIVER_NAME
1275 ": get control failed with %d\n", retval
);
1281 * si470x_vidioc_s_ctrl - set the value of a control
1283 static int si470x_vidioc_s_ctrl(struct file
*file
, void *priv
,
1284 struct v4l2_control
*ctrl
)
1286 struct si470x_device
*radio
= video_drvdata(file
);
1290 if (radio
->disconnected
) {
1296 case V4L2_CID_AUDIO_VOLUME
:
1297 radio
->registers
[SYSCONFIG2
] &= ~SYSCONFIG2_VOLUME
;
1298 radio
->registers
[SYSCONFIG2
] |= ctrl
->value
;
1299 retval
= si470x_set_register(radio
, SYSCONFIG2
);
1301 case V4L2_CID_AUDIO_MUTE
:
1302 if (ctrl
->value
== 1)
1303 radio
->registers
[POWERCFG
] &= ~POWERCFG_DMUTE
;
1305 radio
->registers
[POWERCFG
] |= POWERCFG_DMUTE
;
1306 retval
= si470x_set_register(radio
, POWERCFG
);
1314 printk(KERN_WARNING DRIVER_NAME
1315 ": set control failed with %d\n", retval
);
1321 * si470x_vidioc_g_audio - get audio attributes
1323 static int si470x_vidioc_g_audio(struct file
*file
, void *priv
,
1324 struct v4l2_audio
*audio
)
1326 /* driver constants */
1328 strcpy(audio
->name
, "Radio");
1329 audio
->capability
= V4L2_AUDCAP_STEREO
;
1337 * si470x_vidioc_g_tuner - get tuner attributes
1339 static int si470x_vidioc_g_tuner(struct file
*file
, void *priv
,
1340 struct v4l2_tuner
*tuner
)
1342 struct si470x_device
*radio
= video_drvdata(file
);
1346 if (radio
->disconnected
) {
1350 if (tuner
->index
!= 0) {
1355 retval
= si470x_get_register(radio
, STATUSRSSI
);
1359 /* driver constants */
1360 strcpy(tuner
->name
, "FM");
1361 tuner
->type
= V4L2_TUNER_RADIO
;
1362 tuner
->capability
= V4L2_TUNER_CAP_LOW
| V4L2_TUNER_CAP_STEREO
;
1365 switch ((radio
->registers
[SYSCONFIG2
] & SYSCONFIG2_BAND
) >> 6) {
1366 /* 0: 87.5 - 108 MHz (USA, Europe, default) */
1368 tuner
->rangelow
= 87.5 * FREQ_MUL
;
1369 tuner
->rangehigh
= 108 * FREQ_MUL
;
1371 /* 1: 76 - 108 MHz (Japan wide band) */
1373 tuner
->rangelow
= 76 * FREQ_MUL
;
1374 tuner
->rangehigh
= 108 * FREQ_MUL
;
1376 /* 2: 76 - 90 MHz (Japan) */
1378 tuner
->rangelow
= 76 * FREQ_MUL
;
1379 tuner
->rangehigh
= 90 * FREQ_MUL
;
1383 /* stereo indicator == stereo (instead of mono) */
1384 if ((radio
->registers
[STATUSRSSI
] & STATUSRSSI_ST
) == 1)
1385 tuner
->rxsubchans
= V4L2_TUNER_SUB_MONO
| V4L2_TUNER_SUB_STEREO
;
1387 tuner
->rxsubchans
= V4L2_TUNER_SUB_MONO
;
1389 /* mono/stereo selector */
1390 if ((radio
->registers
[POWERCFG
] & POWERCFG_MONO
) == 1)
1391 tuner
->audmode
= V4L2_TUNER_MODE_MONO
;
1393 tuner
->audmode
= V4L2_TUNER_MODE_STEREO
;
1395 /* min is worst, max is best; signal:0..0xffff; rssi: 0..0xff */
1396 tuner
->signal
= (radio
->registers
[STATUSRSSI
] & STATUSRSSI_RSSI
)
1399 /* automatic frequency control: -1: freq to low, 1 freq to high */
1400 /* AFCRL does only indicate that freq. differs, not if too low/high */
1401 tuner
->afc
= (radio
->registers
[STATUSRSSI
] & STATUSRSSI_AFCRL
) ? 1 : 0;
1405 printk(KERN_WARNING DRIVER_NAME
1406 ": get tuner failed with %d\n", retval
);
1412 * si470x_vidioc_s_tuner - set tuner attributes
1414 static int si470x_vidioc_s_tuner(struct file
*file
, void *priv
,
1415 struct v4l2_tuner
*tuner
)
1417 struct si470x_device
*radio
= video_drvdata(file
);
1418 int retval
= -EINVAL
;
1421 if (radio
->disconnected
) {
1425 if (tuner
->index
!= 0)
1428 /* mono/stereo selector */
1429 switch (tuner
->audmode
) {
1430 case V4L2_TUNER_MODE_MONO
:
1431 radio
->registers
[POWERCFG
] |= POWERCFG_MONO
; /* force mono */
1433 case V4L2_TUNER_MODE_STEREO
:
1434 radio
->registers
[POWERCFG
] &= ~POWERCFG_MONO
; /* try stereo */
1440 retval
= si470x_set_register(radio
, POWERCFG
);
1444 printk(KERN_WARNING DRIVER_NAME
1445 ": set tuner failed with %d\n", retval
);
1451 * si470x_vidioc_g_frequency - get tuner or modulator radio frequency
1453 static int si470x_vidioc_g_frequency(struct file
*file
, void *priv
,
1454 struct v4l2_frequency
*freq
)
1456 struct si470x_device
*radio
= video_drvdata(file
);
1460 if (radio
->disconnected
) {
1464 if (freq
->tuner
!= 0) {
1469 freq
->type
= V4L2_TUNER_RADIO
;
1470 retval
= si470x_get_freq(radio
, &freq
->frequency
);
1474 printk(KERN_WARNING DRIVER_NAME
1475 ": get frequency failed with %d\n", retval
);
1481 * si470x_vidioc_s_frequency - set tuner or modulator radio frequency
1483 static int si470x_vidioc_s_frequency(struct file
*file
, void *priv
,
1484 struct v4l2_frequency
*freq
)
1486 struct si470x_device
*radio
= video_drvdata(file
);
1490 if (radio
->disconnected
) {
1494 if (freq
->tuner
!= 0) {
1499 retval
= si470x_set_freq(radio
, freq
->frequency
);
1503 printk(KERN_WARNING DRIVER_NAME
1504 ": set frequency failed with %d\n", retval
);
1510 * si470x_vidioc_s_hw_freq_seek - set hardware frequency seek
1512 static int si470x_vidioc_s_hw_freq_seek(struct file
*file
, void *priv
,
1513 struct v4l2_hw_freq_seek
*seek
)
1515 struct si470x_device
*radio
= video_drvdata(file
);
1519 if (radio
->disconnected
) {
1523 if (seek
->tuner
!= 0) {
1528 retval
= si470x_set_seek(radio
, seek
->wrap_around
, seek
->seek_upward
);
1532 printk(KERN_WARNING DRIVER_NAME
1533 ": set hardware frequency seek failed with %d\n",
1540 * si470x_ioctl_ops - video device ioctl operations
1542 static const struct v4l2_ioctl_ops si470x_ioctl_ops
= {
1543 .vidioc_querycap
= si470x_vidioc_querycap
,
1544 .vidioc_queryctrl
= si470x_vidioc_queryctrl
,
1545 .vidioc_g_ctrl
= si470x_vidioc_g_ctrl
,
1546 .vidioc_s_ctrl
= si470x_vidioc_s_ctrl
,
1547 .vidioc_g_audio
= si470x_vidioc_g_audio
,
1548 .vidioc_g_tuner
= si470x_vidioc_g_tuner
,
1549 .vidioc_s_tuner
= si470x_vidioc_s_tuner
,
1550 .vidioc_g_frequency
= si470x_vidioc_g_frequency
,
1551 .vidioc_s_frequency
= si470x_vidioc_s_frequency
,
1552 .vidioc_s_hw_freq_seek
= si470x_vidioc_s_hw_freq_seek
,
1557 * si470x_viddev_template - video device interface
1559 static struct video_device si470x_viddev_template
= {
1560 .fops
= &si470x_fops
,
1561 .name
= DRIVER_NAME
,
1562 .release
= video_device_release
,
1563 .ioctl_ops
= &si470x_ioctl_ops
,
1568 /**************************************************************************
1570 **************************************************************************/
1573 * si470x_usb_driver_probe - probe for the device
1575 static int si470x_usb_driver_probe(struct usb_interface
*intf
,
1576 const struct usb_device_id
*id
)
1578 struct si470x_device
*radio
;
1581 /* private data allocation and initialization */
1582 radio
= kzalloc(sizeof(struct si470x_device
), GFP_KERNEL
);
1588 radio
->disconnected
= 0;
1589 radio
->usbdev
= interface_to_usbdev(intf
);
1591 mutex_init(&radio
->disconnect_lock
);
1592 mutex_init(&radio
->lock
);
1594 /* video device allocation and initialization */
1595 radio
->videodev
= video_device_alloc();
1596 if (!radio
->videodev
) {
1600 memcpy(radio
->videodev
, &si470x_viddev_template
,
1601 sizeof(si470x_viddev_template
));
1602 video_set_drvdata(radio
->videodev
, radio
);
1604 /* show some infos about the specific device */
1605 if (si470x_get_all_registers(radio
) < 0) {
1609 printk(KERN_INFO DRIVER_NAME
": DeviceID=0x%4.4hx ChipID=0x%4.4hx\n",
1610 radio
->registers
[DEVICEID
], radio
->registers
[CHIPID
]);
1612 /* check if firmware is current */
1613 if ((radio
->registers
[CHIPID
] & CHIPID_FIRMWARE
)
1614 < RADIO_SW_VERSION_CURRENT
) {
1615 printk(KERN_WARNING DRIVER_NAME
1616 ": This driver is known to work with "
1617 "firmware version %hu,\n", RADIO_SW_VERSION_CURRENT
);
1618 printk(KERN_WARNING DRIVER_NAME
1619 ": but the device has firmware version %hu.\n",
1620 radio
->registers
[CHIPID
] & CHIPID_FIRMWARE
);
1621 printk(KERN_WARNING DRIVER_NAME
1622 ": If you have some trouble using this driver,\n");
1623 printk(KERN_WARNING DRIVER_NAME
1624 ": please report to V4L ML at "
1625 "video4linux-list@redhat.com\n");
1628 /* set initial frequency */
1629 si470x_set_freq(radio
, 87.5 * FREQ_MUL
); /* available in all regions */
1631 /* rds buffer allocation */
1632 radio
->buf_size
= rds_buf
* 3;
1633 radio
->buffer
= kmalloc(radio
->buf_size
, GFP_KERNEL
);
1634 if (!radio
->buffer
) {
1639 /* rds buffer configuration */
1640 radio
->wr_index
= 0;
1641 radio
->rd_index
= 0;
1642 init_waitqueue_head(&radio
->read_queue
);
1644 /* prepare rds work function */
1645 INIT_DELAYED_WORK(&radio
->work
, si470x_work
);
1647 /* register video device */
1648 retval
= video_register_device(radio
->videodev
, VFL_TYPE_RADIO
, radio_nr
);
1650 printk(KERN_WARNING DRIVER_NAME
1651 ": Could not register video device\n");
1654 usb_set_intfdata(intf
, radio
);
1658 video_device_release(radio
->videodev
);
1659 kfree(radio
->buffer
);
1668 * si470x_usb_driver_suspend - suspend the device
1670 static int si470x_usb_driver_suspend(struct usb_interface
*intf
,
1671 pm_message_t message
)
1673 struct si470x_device
*radio
= usb_get_intfdata(intf
);
1675 printk(KERN_INFO DRIVER_NAME
": suspending now...\n");
1677 cancel_delayed_work_sync(&radio
->work
);
1684 * si470x_usb_driver_resume - resume the device
1686 static int si470x_usb_driver_resume(struct usb_interface
*intf
)
1688 struct si470x_device
*radio
= usb_get_intfdata(intf
);
1690 printk(KERN_INFO DRIVER_NAME
": resuming now...\n");
1692 mutex_lock(&radio
->lock
);
1693 if (radio
->users
&& radio
->registers
[SYSCONFIG1
] & SYSCONFIG1_RDS
)
1694 schedule_delayed_work(&radio
->work
,
1695 msecs_to_jiffies(rds_poll_time
));
1696 mutex_unlock(&radio
->lock
);
1703 * si470x_usb_driver_disconnect - disconnect the device
1705 static void si470x_usb_driver_disconnect(struct usb_interface
*intf
)
1707 struct si470x_device
*radio
= usb_get_intfdata(intf
);
1709 mutex_lock(&radio
->disconnect_lock
);
1710 radio
->disconnected
= 1;
1711 cancel_delayed_work_sync(&radio
->work
);
1712 usb_set_intfdata(intf
, NULL
);
1713 if (radio
->users
== 0) {
1714 video_unregister_device(radio
->videodev
);
1715 kfree(radio
->buffer
);
1718 mutex_unlock(&radio
->disconnect_lock
);
1723 * si470x_usb_driver - usb driver interface
1725 static struct usb_driver si470x_usb_driver
= {
1726 .name
= DRIVER_NAME
,
1727 .probe
= si470x_usb_driver_probe
,
1728 .disconnect
= si470x_usb_driver_disconnect
,
1729 .suspend
= si470x_usb_driver_suspend
,
1730 .resume
= si470x_usb_driver_resume
,
1731 .id_table
= si470x_usb_driver_id_table
,
1732 .supports_autosuspend
= 1,
1737 /**************************************************************************
1739 **************************************************************************/
1742 * si470x_module_init - module init
1744 static int __init
si470x_module_init(void)
1746 printk(KERN_INFO DRIVER_DESC
", Version " DRIVER_VERSION
"\n");
1747 return usb_register(&si470x_usb_driver
);
1752 * si470x_module_exit - module exit
1754 static void __exit
si470x_module_exit(void)
1756 usb_deregister(&si470x_usb_driver
);
1760 module_init(si470x_module_init
);
1761 module_exit(si470x_module_exit
);
1763 MODULE_LICENSE("GPL");
1764 MODULE_AUTHOR(DRIVER_AUTHOR
);
1765 MODULE_DESCRIPTION(DRIVER_DESC
);
1766 MODULE_VERSION(DRIVER_VERSION
);