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-rw-r--r--drivers/media/radio/radio-si470x.c1440
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diff --git a/drivers/media/radio/radio-si470x.c b/drivers/media/radio/radio-si470x.c
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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 *
8 * Copyright (c) 2007 Tobias Lorenz <tobias.lorenz@gmx.net>
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 */
24
25
26/*
27 * History:
28 * 2008-01-12 Tobias Lorenz <tobias.lorenz@gmx.net>
29 * Version 1.0.0
30 * - First working version
31 * 2008-01-13 Tobias Lorenz <tobias.lorenz@gmx.net>
32 * Version 1.0.1
33 * - Improved error handling, every function now returns errno
34 * - Improved multi user access (start/mute/stop)
35 * - Channel doesn't get lost anymore after start/mute/stop
36 * - RDS support added (polling mode via interrupt EP 1)
37 * - marked default module parameters with *value*
38 * - switched from bit structs to bit masks
39 * - header file cleaned and integrated
40 * 2008-01-14 Tobias Lorenz <tobias.lorenz@gmx.net>
41 * Version 1.0.2
42 * - hex values are now lower case
43 * - commented USB ID for ADS/Tech moved on todo list
44 * - blacklisted si470x in hid-quirks.c
45 * - rds buffer handling functions integrated into *_work, *_read
46 * - rds_command in si470x_poll exchanged against simple retval
47 * - check for firmware version 15
48 * - code order and prototypes still remain the same
49 * - spacing and bottom of band codes remain the same
50 *
51 * ToDo:
52 * - check USB Vendor/Product ID for ADS/Tech FM Radio Receiver
53 * (formerly Instant FM Music) (RDX-155-EF) is 06e1:a155
54 * - add seeking support
55 * - add firmware download/update support
56 * - add possibility to switch off RDS
57 * - RDS support: interrupt mode, instead of polling
58 * - add LED status output
59 */
60
61/* driver definitions */
62#define DRIVER_AUTHOR "Tobias Lorenz <tobias.lorenz@gmx.net>"
63#define DRIVER_NAME "radio-si470x"
64#define DRIVER_VERSION KERNEL_VERSION(1, 0, 2)
65#define DRIVER_CARD "Silicon Labs Si470x FM Radio Receiver"
66#define DRIVER_DESC "USB radio driver for Si470x FM Radio Receivers"
67
68
69/* kernel includes */
70#include <linux/kernel.h>
71#include <linux/module.h>
72#include <linux/init.h>
73#include <linux/slab.h>
74#include <linux/input.h>
75#include <linux/videodev2.h>
76#include <media/v4l2-common.h>
77#include <linux/usb.h>
78#include <linux/hid.h>
79#include <linux/version.h>
80#include <media/rds.h>
81
82
83/* Radio Nr */
84static int radio_nr = -1;
85module_param(radio_nr, int, 0);
86MODULE_PARM_DESC(radio_nr, "Radio Nr");
87
88/* Spacing (kHz) */
89/* 0: 200 kHz (USA, Australia) */
90/* 1: 100 kHz (Europe, Japan) */
91/* 2: 50 kHz */
92static int space = 2;
93module_param(space, int, 0);
94MODULE_PARM_DESC(radio_nr, "Spacing: 0=200kHz 1=100kHz *2=50kHz*");
95
96/* Bottom of Band (MHz) */
97/* 0: 87.5 - 108 MHz (USA, Europe)*/
98/* 1: 76 - 108 MHz (Japan wide band) */
99/* 2: 76 - 90 MHz (Japan) */
100static int band = 1;
101module_param(band, int, 0);
102MODULE_PARM_DESC(radio_nr, "Band: 0=87.5..108MHz *1=76..108MHz* 2=76..90MHz");
103
104/* De-emphasis */
105/* 0: 75 us (USA) */
106/* 1: 50 us (Europe, Australia, Japan) */
107static int de = 1;
108module_param(de, int, 0);
109MODULE_PARM_DESC(radio_nr, "De-emphasis: 0=75us *1=50us*");
110
111/* USB timeout */
112static int usb_timeout = 500;
113module_param(usb_timeout, int, 0);
114MODULE_PARM_DESC(usb_timeout, "USB timeout (ms): *500*");
115
116/* Seek retries */
117static int seek_retries = 100;
118module_param(seek_retries, int, 0);
119MODULE_PARM_DESC(seek_retries, "Seek retries: *100*");
120
121/* RDS buffer blocks */
122static int rds_buf = 100;
123module_param(rds_buf, int, 0);
124MODULE_PARM_DESC(rds_buf, "RDS buffer entries: *100*");
125
126/* RDS maximum block errors */
127static int max_rds_errors = 1;
128/* 0 means 0 errors requiring correction */
129/* 1 means 1-2 errors requiring correction (used by original USBRadio.exe) */
130/* 2 means 3-5 errors requiring correction */
131/* 3 means 6+ errors or errors in checkword, correction not possible */
132module_param(max_rds_errors, int, 0);
133MODULE_PARM_DESC(max_rds_errors, "RDS maximum block errors: *1*");
134
135/* RDS poll frequency */
136static int rds_poll_time = 40;
137/* 40 is used by the original USBRadio.exe */
138/* 75 should be okay */
139/* 80 is the usual RDS receive interval */
140module_param(rds_poll_time, int, 0);
141MODULE_PARM_DESC(rds_poll_time, "RDS poll time (ms): *40*");
142
143
144
145/**************************************************************************
146 * Register Definitions
147 **************************************************************************/
148#define FMRADIO_REGISTER_SIZE 2 /* 16 register bit width */
149#define FMRADIO_REGISTER_NUM 16 /* DEVICEID ... RDSD */
150#define RDS_REGISTER_NUM 6 /* STATUSRSSI ... RDSD */
151
152#define DEVICEID 0 /* Device ID */
153#define DEVICEID_PN 0xf000 /* bits 15..12: Part Number */
154#define DEVICEID_MFGID 0x0fff /* bits 11..00: Manufacturer ID */
155
156#define CHIPID 1 /* Chip ID */
157#define CHIPID_REV 0xfc00 /* bits 15..10: Chip Version */
158#define CHIPID_DEV 0x0200 /* bits 09..09: Device */
159#define CHIPID_FIRMWARE 0x01ff /* bits 08..00: Firmware Version */
160
161#define POWERCFG 2 /* Power Configuration */
162#define POWERCFG_DSMUTE 0x8000 /* bits 15..15: Softmute Disable */
163#define POWERCFG_DMUTE 0x4000 /* bits 14..14: Mute Disable */
164#define POWERCFG_MONO 0x2000 /* bits 13..13: Mono Select */
165#define POWERCFG_RDSM 0x0800 /* bits 11..11: RDS Mode (Si4701 only) */
166#define POWERCFG_SKMODE 0x0400 /* bits 10..10: Seek Mode */
167#define POWERCFG_SEEKUP 0x0200 /* bits 09..09: Seek Direction */
168#define POWERCFG_SEEK 0x0100 /* bits 08..08: Seek */
169#define POWERCFG_DISABLE 0x0040 /* bits 06..06: Powerup Disable */
170#define POWERCFG_ENABLE 0x0001 /* bits 00..00: Powerup Enable */
171
172#define CHANNEL 3 /* Channel */
173#define CHANNEL_TUNE 0x8000 /* bits 15..15: Tune */
174#define CHANNEL_CHAN 0x03ff /* bits 09..00: Channel Select */
175
176#define SYSCONFIG1 4 /* System Configuration 1 */
177#define SYSCONFIG1_RDSIEN 0x8000 /* bits 15..15: RDS Interrupt Enable (Si4701 only) */
178#define SYSCONFIG1_STCIEN 0x4000 /* bits 14..14: Seek/Tune Complete Interrupt Enable */
179#define SYSCONFIG1_RDS 0x1000 /* bits 12..12: RDS Enable (Si4701 only) */
180#define SYSCONFIG1_DE 0x0800 /* bits 11..11: De-emphasis (0=75us 1=50us) */
181#define SYSCONFIG1_AGCD 0x0400 /* bits 10..10: AGC Disable */
182#define SYSCONFIG1_BLNDADJ 0x00c0 /* bits 07..06: Stereo/Mono Blend Level Adjustment */
183#define SYSCONFIG1_GPIO3 0x0030 /* bits 05..04: General Purpose I/O 3 */
184#define SYSCONFIG1_GPIO2 0x000c /* bits 03..02: General Purpose I/O 2 */
185#define SYSCONFIG1_GPIO1 0x0003 /* bits 01..00: General Purpose I/O 1 */
186
187#define SYSCONFIG2 5 /* System Configuration 2 */
188#define SYSCONFIG2_SEEKTH 0xff00 /* bits 15..08: RSSI Seek Threshold */
189#define SYSCONFIG2_BAND 0x0080 /* bits 07..06: Band Select */
190#define SYSCONFIG2_SPACE 0x0030 /* bits 05..04: Channel Spacing */
191#define SYSCONFIG2_VOLUME 0x000f /* bits 03..00: Volume */
192
193#define SYSCONFIG3 6 /* System Configuration 3 */
194#define SYSCONFIG3_SMUTER 0xc000 /* bits 15..14: Softmute Attack/Recover Rate */
195#define SYSCONFIG3_SMUTEA 0x3000 /* bits 13..12: Softmute Attenuation */
196#define SYSCONFIG3_SKSNR 0x00f0 /* bits 07..04: Seek SNR Threshold */
197#define SYSCONFIG3_SKCNT 0x000f /* bits 03..00: Seek FM Impulse Detection Threshold */
198
199#define TEST1 7 /* Test 1 */
200#define TEST1_AHIZEN 0x4000 /* bits 14..14: Audio High-Z Enable */
201
202#define TEST2 8 /* Test 2 */
203/* TEST2 only contains reserved bits */
204
205#define BOOTCONFIG 9 /* Boot Configuration */
206/* BOOTCONFIG only contains reserved bits */
207
208#define STATUSRSSI 10 /* Status RSSI */
209#define STATUSRSSI_RDSR 0x8000 /* bits 15..15: RDS Ready (Si4701 only) */
210#define STATUSRSSI_STC 0x4000 /* bits 14..14: Seek/Tune Complete */
211#define STATUSRSSI_SF 0x2000 /* bits 13..13: Seek Fail/Band Limit */
212#define STATUSRSSI_AFCRL 0x1000 /* bits 12..12: AFC Rail */
213#define STATUSRSSI_RDSS 0x0800 /* bits 11..11: RDS Synchronized (Si4701 only) */
214#define STATUSRSSI_BLERA 0x0600 /* bits 10..09: RDS Block A Errors (Si4701 only) */
215#define STATUSRSSI_ST 0x0100 /* bits 08..08: Stereo Indicator */
216#define STATUSRSSI_RSSI 0x00ff /* bits 07..00: RSSI (Received Signal Strength Indicator) */
217
218#define READCHAN 11 /* Read Channel */
219#define READCHAN_BLERB 0xc000 /* bits 15..14: RDS Block D Errors (Si4701 only) */
220#define READCHAN_BLERC 0x3000 /* bits 13..12: RDS Block C Errors (Si4701 only) */
221#define READCHAN_BLERD 0x0c00 /* bits 11..10: RDS Block B Errors (Si4701 only) */
222#define READCHAN_READCHAN 0x03ff /* bits 09..00: Read Channel */
223
224#define RDSA 12 /* RDSA */
225#define RDSA_RDSA 0xffff /* bits 15..00: RDS Block A Data (Si4701 only) */
226
227#define RDSB 13 /* RDSB */
228#define RDSB_RDSB 0xffff /* bits 15..00: RDS Block B Data (Si4701 only) */
229
230#define RDSC 14 /* RDSC */
231#define RDSC_RDSC 0xffff /* bits 15..00: RDS Block C Data (Si4701 only) */
232
233#define RDSD 15 /* RDSD */
234#define RDSD_RDSD 0xffff /* bits 15..00: RDS Block D Data (Si4701 only) */
235
236
237
238/**************************************************************************
239 * USB HID reports
240 **************************************************************************/
241
242/* Reports 1-16 give direct read/write access to the 16 Si470x registers */
243/* with the (REPORT_ID - 1) corresponding to the register address across USB */
244/* endpoint 0 using GET_REPORT and SET_REPORT */
245#define REGISTER_REPORT_SIZE (FMRADIO_REGISTER_SIZE + 1)
246#define REGISTER_REPORT(reg) ((reg) + 1)
247
248/* Report 17 gives direct read/write access to the entire Si470x register */
249/* map across endpoint 0 using GET_REPORT and SET_REPORT */
250#define ENTIRE_REPORT_SIZE (FMRADIO_REGISTER_NUM * FMRADIO_REGISTER_SIZE + 1)
251#define ENTIRE_REPORT 17
252
253/* Report 18 is used to send the lowest 6 Si470x registers up the HID */
254/* interrupt endpoint 1 to Windows every 20 milliseconds for status */
255#define RDS_REPORT_SIZE (RDS_REGISTER_NUM * FMRADIO_REGISTER_SIZE + 1)
256#define RDS_REPORT 18
257
258/* Report 19: LED state */
259#define LED_REPORT_SIZE 3
260#define LED_REPORT 19
261
262/* Report 19: stream */
263#define STREAM_REPORT_SIZE 3
264#define STREAM_REPORT 19
265
266/* Report 20: scratch */
267#define SCRATCH_PAGE_SIZE 63
268#define SCRATCH_REPORT_SIZE (SCRATCH_PAGE_SIZE + 1)
269#define SCRATCH_REPORT 20
270
271/* Reports 19-22: flash upgrade of the C8051F321 */
272#define WRITE_REPORT 19
273#define FLASH_REPORT 20
274#define CRC_REPORT 21
275#define RESPONSE_REPORT 22
276
277/* Report 23: currently unused, but can accept 60 byte reports on the HID */
278/* interrupt out endpoint 2 every 1 millisecond */
279#define UNUSED_REPORT 23
280
281
282
283/**************************************************************************
284 * software/hardware versions
285 **************************************************************************/
286#define FMRADIO_SW_VERSION_NOT_BOOTLOADABLE 6
287#define FMRADIO_SW_VERSION 7
288#define FMRADIO_SW_VERSION_CURRENT 15
289#define FMRADIO_HW_VERSION 1
290
291#define SCRATCH_PAGE_SW_VERSION 1
292#define SCRATCH_PAGE_HW_VERSION 2
293
294
295
296/**************************************************************************
297 * LED State definitions
298 **************************************************************************/
299#define LED_COMMAND 0x35
300
301#define NO_CHANGE_LED 0x00
302#define ALL_COLOR_LED 0x01 /* streaming state */
303#define BLINK_GREEN_LED 0x02 /* connect state */
304#define BLINK_RED_LED 0x04
305#define BLINK_ORANGE_LED 0x10 /* disconnect state */
306#define SOLID_GREEN_LED 0x20 /* tuning/seeking state */
307#define SOLID_RED_LED 0x40 /* bootload state */
308#define SOLID_ORANGE_LED 0x80
309
310
311
312/**************************************************************************
313 * Stream State definitions
314 **************************************************************************/
315#define STREAM_COMMAND 0x36
316#define STREAM_VIDPID 0x00
317#define STREAM_AUDIO 0xff
318
319
320
321/**************************************************************************
322 * bootloader / flash commands
323 **************************************************************************/
324
325/* Unique ID sent to bootloader and required to put into a bootload state */
326#define UNIQUE_BL_ID 0x34
327
328/* Mask for the flash data */
329#define FLASH_DATA_MASK 0x55
330
331/* Bootloader commands */
332#define GET_SW_VERSION_COMMAND 0x00
333#define SET_PAGE_COMMAND 0x01
334#define ERASE_PAGE_COMMAND 0x02
335#define WRITE_PAGE_COMMAND 0x03
336#define CRC_ON_PAGE_COMMAND 0x04
337#define READ_FLASH_BYTE_COMMAND 0x05
338#define RESET_DEVICE_COMMAND 0x06
339#define GET_HW_VERSION_COMMAND 0x07
340#define BLANK 0xff
341
342/* Bootloader command responses */
343#define COMMAND_OK 0x01
344#define COMMAND_FAILED 0x02
345#define COMMAND_PENDING 0x03
346
347/* Buffer sizes */
348#define COMMAND_BUFFER_SIZE 4
349#define RESPONSE_BUFFER_SIZE 2
350#define FLASH_BUFFER_SIZE 64
351#define CRC_BUFFER_SIZE 3
352
353
354
355/**************************************************************************
356 * Driver private definitions
357 **************************************************************************/
358
359/* private data */
360struct si470x_device {
361 /* reference to USB and video device */
362 struct usb_device *usbdev;
363 struct video_device *videodev;
364
365 /* are these really necessary ? */
366 int users;
367
368 /* report buffer (maximum 64 bytes) */
369 unsigned char buf[64];
370
371 /* Silabs internal registers (0..15) */
372 unsigned short registers[FMRADIO_REGISTER_NUM];
373
374 /* RDS receive buffer */
375 struct work_struct work;
376 struct timer_list timer;
377 spinlock_t lock;
378 unsigned char *buffer;
379 unsigned int buf_size;
380 unsigned int rd_index;
381 unsigned int wr_index;
382 unsigned int block_count;
383 unsigned char last_blocknum;
384 wait_queue_head_t read_queue;
385 int data_available_for_read;
386};
387
388/* register acccess functions */
389static int si470x_get_report(struct si470x_device *radio, int size);
390static int si470x_set_report(struct si470x_device *radio, int size);
391static int si470x_get_register(struct si470x_device *radio, int regnr);
392static int si470x_set_register(struct si470x_device *radio, int regnr);
393static int si470x_get_all_registers(struct si470x_device *radio);
394static int si470x_get_rds_registers(struct si470x_device *radio);
395
396/* high-level functions */
397static int si470x_start(struct si470x_device *radio);
398static int si470x_stop(struct si470x_device *radio);
399static int si470x_set_chan(struct si470x_device *radio, int chan);
400static int si470x_get_freq(struct si470x_device *radio);
401static int si470x_set_freq(struct si470x_device *radio, int freq);
402
403/* RDS functions */
404static void si470x_rds(struct si470x_device *radio);
405static void si470x_timer(unsigned long data);
406static void si470x_work(struct work_struct *work);
407
408
409
410/**************************************************************************
411 * USB interface definitions
412 **************************************************************************/
413
414/* USB device ID list (Vendor, Product, Class, SubClass, Protocol) */
415static struct usb_device_id si470x_usb_driver_id_table[] = {
416 /* Silicon Labs USB FM Radio Reference Design */
417 { USB_DEVICE_AND_INTERFACE_INFO(0x10c4, 0x818a, USB_CLASS_HID, 0, 0) },
418 /* Terminating entry */
419 { }
420};
421MODULE_DEVICE_TABLE (usb, si470x_usb_driver_id_table);
422
423/* USB driver functions */
424static int si470x_usb_driver_probe(struct usb_interface *intf,
425 const struct usb_device_id *id);
426static void si470x_usb_driver_disconnect(struct usb_interface *intf);
427
428/* USB driver interface */
429static struct usb_driver si470x_usb_driver = {
430 .name = DRIVER_NAME,
431 .probe = si470x_usb_driver_probe,
432 .disconnect = si470x_usb_driver_disconnect,
433 .id_table = si470x_usb_driver_id_table,
434};
435
436
437
438/**************************************************************************
439 * Video4Linux interface definitions
440 **************************************************************************/
441
442/* The frequency is set in units of 62.5 Hz when using V4L2_TUNER_CAP_LOW, */
443/* 62.5 kHz otherwise. */
444/* The tuner is able to have a channel spacing of 50, 100 or 200 kHz. */
445/* tuner->capability is therefore set to V4L2_TUNER_CAP_LOW */
446/* The FREQ_MUL is then: 1 MHz / 62.5 Hz = 16000 */
447#define FREQ_MUL (1000000 / 62.5)
448
449/* File operations functions */
450static ssize_t si470x_fops_read(struct file *file, char __user *buf,
451 size_t count, loff_t *ppos);
452static unsigned int si470x_fops_poll(struct file *file,
453 struct poll_table_struct *pts);
454static int si470x_fops_open(struct inode *inode, struct file *file);
455static int si470x_fops_release(struct inode *inode, struct file *file);
456
457/* File operations interface */
458static const struct file_operations si470x_fops = {
459 .owner = THIS_MODULE,
460 .llseek = no_llseek,
461 .read = si470x_fops_read,
462 .poll = si470x_fops_poll,
463 .ioctl = video_ioctl2,
464 .compat_ioctl = v4l_compat_ioctl32,
465 .open = si470x_fops_open,
466 .release = si470x_fops_release,
467};
468
469/* Video device functions */
470static int si470x_vidioc_querycap(struct file *file, void *priv,
471 struct v4l2_capability *capability);
472static int si470x_vidioc_g_input(struct file *file, void *priv,
473 unsigned int *i);
474static int si470x_vidioc_s_input(struct file *file, void *priv,
475 unsigned int i);
476static int si470x_vidioc_queryctrl(struct file *file, void *priv,
477 struct v4l2_queryctrl *qc);
478static int si470x_vidioc_g_ctrl(struct file *file, void *priv,
479 struct v4l2_control *ctrl);
480static int si470x_vidioc_s_ctrl(struct file *file, void *priv,
481 struct v4l2_control *ctrl);
482static int si470x_vidioc_g_audio(struct file *file, void *priv,
483 struct v4l2_audio *audio);
484static int si470x_vidioc_s_audio(struct file *file, void *priv,
485 struct v4l2_audio *audio);
486static int si470x_vidioc_g_tuner(struct file *file, void *priv,
487 struct v4l2_tuner *tuner);
488static int si470x_vidioc_s_tuner(struct file *file, void *priv,
489 struct v4l2_tuner *tuner);
490static int si470x_vidioc_g_frequency(struct file *file, void *priv,
491 struct v4l2_frequency *freq);
492static int si470x_vidioc_s_frequency(struct file *file, void *priv,
493 struct v4l2_frequency *freq);
494
495/* Video device interface */
496static struct video_device si470x_viddev_template = {
497 .fops = &si470x_fops,
498 .name = DRIVER_NAME,
499 .type = VID_TYPE_TUNER,
500 .release = video_device_release,
501 .vidioc_querycap = si470x_vidioc_querycap,
502 .vidioc_g_input = si470x_vidioc_g_input,
503 .vidioc_s_input = si470x_vidioc_s_input,
504 .vidioc_queryctrl = si470x_vidioc_queryctrl,
505 .vidioc_g_ctrl = si470x_vidioc_g_ctrl,
506 .vidioc_s_ctrl = si470x_vidioc_s_ctrl,
507 .vidioc_g_audio = si470x_vidioc_g_audio,
508 .vidioc_s_audio = si470x_vidioc_s_audio,
509 .vidioc_g_tuner = si470x_vidioc_g_tuner,
510 .vidioc_s_tuner = si470x_vidioc_s_tuner,
511 .vidioc_g_frequency = si470x_vidioc_g_frequency,
512 .vidioc_s_frequency = si470x_vidioc_s_frequency,
513 .owner = THIS_MODULE,
514};
515
516/* Query control */
517static struct v4l2_queryctrl radio_queryctrl[] = {
518/* HINT: the disabled controls are only here to satify kradio and such apps */
519 {
520 .id = V4L2_CID_AUDIO_VOLUME,
521 .type = V4L2_CTRL_TYPE_INTEGER,
522 .name = "Volume",
523 .minimum = 0,
524 .maximum = 15,
525 .step = 1,
526 .default_value = 15,
527 },
528 {
529 .id = V4L2_CID_AUDIO_BALANCE,
530 .flags = V4L2_CTRL_FLAG_DISABLED,
531 },
532 {
533 .id = V4L2_CID_AUDIO_BASS,
534 .flags = V4L2_CTRL_FLAG_DISABLED,
535 },
536 {
537 .id = V4L2_CID_AUDIO_TREBLE,
538 .flags = V4L2_CTRL_FLAG_DISABLED,
539 },
540 {
541 .id = V4L2_CID_AUDIO_MUTE,
542 .type = V4L2_CTRL_TYPE_BOOLEAN,
543 .name = "Mute",
544 .minimum = 0,
545 .maximum = 1,
546 .step = 1,
547 .default_value = 1,
548 },
549 {
550 .id = V4L2_CID_AUDIO_LOUDNESS,
551 .flags = V4L2_CTRL_FLAG_DISABLED,
552 },
553};
554
555
556
557/**************************************************************************
558 * Driver private functions
559 **************************************************************************/
560
561/*
562 * si470x_get_report - receive a HID report
563 */
564static int si470x_get_report(struct si470x_device *radio, int size)
565{
566 return usb_control_msg(radio->usbdev,
567 usb_rcvctrlpipe(radio->usbdev, 0),
568 HID_REQ_GET_REPORT,
569 USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,
570 radio->buf[0], 2,
571 radio->buf, size, usb_timeout);
572}
573
574
575/*
576 * si470x_set_report - send a HID report
577 */
578static int si470x_set_report(struct si470x_device *radio, int size)
579{
580 return usb_control_msg(radio->usbdev,
581 usb_sndctrlpipe(radio->usbdev, 0),
582 HID_REQ_SET_REPORT,
583 USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_OUT,
584 radio->buf[0], 2,
585 radio->buf, size, usb_timeout);
586}
587
588
589/*
590 * si470x_get_register - read register
591 */
592static int si470x_get_register(struct si470x_device *radio, int regnr)
593{
594 int retval;
595
596 radio->buf[0] = REGISTER_REPORT(regnr);
597
598 retval = si470x_get_report(radio, REGISTER_REPORT_SIZE);
599 if (retval >= 0)
600 radio->registers[regnr] = (radio->buf[1] << 8) | radio->buf[2];
601
602 return (retval < 0) ? -EINVAL : 0;
603}
604
605
606/*
607 * si470x_set_register - write register
608 */
609static int si470x_set_register(struct si470x_device *radio, int regnr)
610{
611 int retval;
612
613 radio->buf[0] = REGISTER_REPORT(regnr);
614 radio->buf[1] = (radio->registers[regnr] & 0xff00) >> 8;
615 radio->buf[2] = (radio->registers[regnr] & 0x00ff);
616
617 retval = si470x_set_report(radio, REGISTER_REPORT_SIZE);
618
619 return (retval < 0) ? -EINVAL : 0;
620}
621
622
623/*
624 * si470x_get_all_registers - read entire registers
625 */
626static int si470x_get_all_registers(struct si470x_device *radio)
627{
628 int retval;
629 int regnr;
630
631 radio->buf[0] = ENTIRE_REPORT;
632
633 retval = si470x_get_report(radio, ENTIRE_REPORT_SIZE);
634
635 if (retval >= 0)
636 for (regnr = 0; regnr < FMRADIO_REGISTER_NUM; regnr++)
637 radio->registers[regnr] =
638 (radio->buf[regnr * FMRADIO_REGISTER_SIZE + 1] << 8) |
639 radio->buf[regnr * FMRADIO_REGISTER_SIZE + 2];
640
641 return (retval < 0) ? -EINVAL : 0;
642}
643
644
645/*
646 * si470x_get_rds_registers - read rds registers
647 */
648static int si470x_get_rds_registers(struct si470x_device *radio)
649{
650 int retval;
651 int regnr;
652 int size;
653
654 radio->buf[0] = RDS_REPORT;
655
656 retval = usb_interrupt_msg(radio->usbdev,
657 usb_rcvctrlpipe(radio->usbdev, 1),
658 radio->buf, RDS_REPORT_SIZE, &size, usb_timeout);
659
660 if (retval >= 0) {
661 for (regnr = 0; regnr < RDS_REGISTER_NUM; regnr++) {
662 radio->registers[STATUSRSSI + regnr] =
663 (radio->buf[regnr * FMRADIO_REGISTER_SIZE + 1] << 8) |
664 radio->buf[regnr * FMRADIO_REGISTER_SIZE + 2];
665 }
666 }
667
668 return (retval < 0) ? - EINVAL : 0;
669}
670
671
672/*
673 * si470x_start - switch on radio
674 */
675static int si470x_start(struct si470x_device *radio)
676{
677 int retval;
678
679 /* powercfg */
680 radio->registers[POWERCFG] =
681 POWERCFG_DMUTE | POWERCFG_ENABLE | POWERCFG_RDSM;
682 retval = si470x_set_register(radio, POWERCFG);
683 if (retval < 0)
684 return retval;
685
686 /* sysconfig 1 */
687 radio->registers[SYSCONFIG1] =
688 SYSCONFIG1_DE | SYSCONFIG1_RDS;
689 retval = si470x_set_register(radio, SYSCONFIG1);
690 if (retval < 0)
691 return retval;
692
693 /* sysconfig 2 */
694 radio->registers[SYSCONFIG2] =
695 (0x3f << 8) | /* SEEKTH */
696 (band << 6) | /* BAND */
697 (space << 4) | /* SPACE */
698 15; /* VOLUME (max) */
699 retval = si470x_set_register(radio, SYSCONFIG2);
700 if (retval < 0)
701 return retval;
702
703 /* reset last channel */
704 return si470x_set_chan(radio,
705 radio->registers[CHANNEL] & CHANNEL_CHAN);
706}
707
708
709/*
710 * si470x_stop - switch off radio
711 */
712static int si470x_stop(struct si470x_device *radio)
713{
714 /* powercfg */
715 radio->registers[POWERCFG] &= ~POWERCFG_DMUTE;
716 /* POWERCFG_ENABLE has to automatically go low */
717 radio->registers[POWERCFG] |= POWERCFG_ENABLE | POWERCFG_DISABLE;
718 return si470x_set_register(radio, POWERCFG);
719}
720
721
722/*
723 * si470x_set_chan - set the channel
724 */
725static int si470x_set_chan(struct si470x_device *radio, int chan)
726{
727 int retval, i;
728
729 /* start tuning */
730 radio->registers[CHANNEL] &= ~CHANNEL_CHAN;
731 radio->registers[CHANNEL] |= CHANNEL_TUNE | chan;
732 retval = si470x_set_register(radio, CHANNEL);
733 if (retval < 0)
734 return retval;
735
736 /* wait till seek operation has completed */
737 i = 0;
738 do {
739 retval = si470x_get_register(radio, STATUSRSSI);
740 if (retval < 0)
741 return retval;
742 } while ((radio->registers[STATUSRSSI] & STATUSRSSI_STC) &&
743 (++i < seek_retries));
744 if (i >= seek_retries)
745 printk(KERN_WARNING DRIVER_NAME
746 ": seek does not finish after %d tries\n", i);
747
748 /* stop tuning */
749 radio->registers[CHANNEL] &= ~CHANNEL_TUNE;
750 return si470x_set_register(radio, CHANNEL);
751}
752
753
754/*
755 * si470x_get_freq - get the frequency
756 */
757static int si470x_get_freq(struct si470x_device *radio)
758{
759 int spacing, band_bottom, chan, freq;
760 int retval;
761
762 /* Spacing (kHz) */
763 switch (space) {
764 /* 0: 200 kHz (USA, Australia) */
765 default: spacing = 0.200 * FREQ_MUL; break;
766 /* 1: 100 kHz (Europe, Japan) */
767 case 1 : spacing = 0.100 * FREQ_MUL; break;
768 /* 2: 50 kHz */
769 case 2 : spacing = 0.050 * FREQ_MUL; break;
770 };
771
772 /* Bottom of Band (MHz) */
773 switch (band) {
774 /* 0: 87.5 - 108 MHz (USA, Europe) */
775 default: band_bottom = 87.5 * FREQ_MUL; break;
776 /* 1: 76 - 108 MHz (Japan wide band) */
777 case 1 : band_bottom = 76 * FREQ_MUL; break;
778 /* 2: 76 - 90 MHz (Japan) */
779 case 2 : band_bottom = 76 * FREQ_MUL; break;
780 };
781
782 /* read channel */
783 retval = si470x_get_register(radio, READCHAN);
784 if (retval < 0)
785 return retval;
786 chan = radio->registers[READCHAN] & READCHAN_READCHAN;
787
788 /* Frequency (MHz) = Spacing (kHz) x Channel + Bottom of Band (MHz) */
789 freq = chan * spacing + band_bottom;
790
791 return freq;
792}
793
794
795/*
796 * si470x_set_freq - set the frequency
797 */
798static int si470x_set_freq(struct si470x_device *radio, int freq)
799{
800 int spacing, band_bottom, chan;
801
802 /* Spacing (kHz) */
803 switch (space) {
804 /* 0: 200 kHz (USA, Australia) */
805 default: spacing = 0.200 * FREQ_MUL; break;
806 /* 1: 100 kHz (Europe, Japan) */
807 case 1 : spacing = 0.100 * FREQ_MUL; break;
808 /* 2: 50 kHz */
809 case 2 : spacing = 0.050 * FREQ_MUL; break;
810 };
811
812 /* Bottom of Band (MHz) */
813 switch (band) {
814 /* 0: 87.5 - 108 MHz (USA, Europe) */
815 default: band_bottom = 87.5 * FREQ_MUL; break;
816 /* 1: 76 - 108 MHz (Japan wide band) */
817 case 1 : band_bottom = 76 * FREQ_MUL; break;
818 /* 2: 76 - 90 MHz (Japan) */
819 case 2 : band_bottom = 76 * FREQ_MUL; break;
820 };
821
822 /* Chan = [ Freq (Mhz) - Bottom of Band (MHz) ] / Spacing (kHz) */
823 chan = (freq - band_bottom) / spacing;
824
825 return si470x_set_chan(radio, chan);
826}
827
828
829
830/*
831 * si470x_rds - rds processing function
832 */
833static void si470x_rds(struct si470x_device *radio)
834{
835 unsigned long flags;
836 unsigned char tmpbuf[3];
837 unsigned char blocknum;
838 unsigned char bler; /* RDS block errors */
839 unsigned short rds;
840 unsigned int i;
841
842 if (radio->users == 0)
843 return;
844 if (si470x_get_rds_registers(radio) < 0)
845 return;
846 if ((radio->registers[STATUSRSSI] & STATUSRSSI_RDSR) == 0) {
847 /* No RDS group ready */
848 return;
849 }
850 if ((radio->registers[STATUSRSSI] & STATUSRSSI_RDSS) == 0) {
851 /* RDS decoder not synchronized */
852 return;
853 }
854
855 for (blocknum = 0; blocknum < 4; blocknum++) {
856 switch (blocknum) {
857 default:
858 bler = (radio->registers[STATUSRSSI] &
859 STATUSRSSI_BLERA) >> 9;
860 rds = radio->registers[RDSA];
861 break;
862 case 1:
863 bler = (radio->registers[READCHAN] &
864 READCHAN_BLERB) >> 14;
865 rds = radio->registers[RDSB];
866 break;
867 case 2:
868 bler = (radio->registers[READCHAN] &
869 READCHAN_BLERC) >> 12;
870 rds = radio->registers[RDSC];
871 break;
872 case 3:
873 bler = (radio->registers[READCHAN] &
874 READCHAN_BLERD) >> 10;
875 rds = radio->registers[RDSD];
876 break;
877 };
878
879 /* Fill the V4L2 RDS buffer */
880 tmpbuf[0] = rds & 0x00ff; /* LSB */
881 tmpbuf[1] = (rds & 0xff00) >> 8;/* MSB */
882 tmpbuf[2] = blocknum; /* offset name */
883 tmpbuf[2] |= blocknum << 3; /* received offset */
884 if (bler > max_rds_errors)
885 tmpbuf[2] |= 0x80; /* uncorrectable errors */
886 else if (bler > 0)
887 tmpbuf[2] |= 0x40; /* corrected error(s) */
888
889 spin_lock_irqsave(&radio->lock, flags);
890
891 /* copy RDS block to internal buffer */
892 for (i = 0; i < 3; i++) {
893 radio->buffer[radio->wr_index] = tmpbuf[i];
894 radio->wr_index++;
895 }
896
897 if (radio->wr_index >= radio->buf_size)
898 radio->wr_index = 0;
899
900 if (radio->wr_index == radio->rd_index) {
901 radio->rd_index += 3;
902 if (radio->rd_index >= radio->buf_size)
903 radio->rd_index = 0;
904 } else
905 radio->block_count++;
906
907 spin_unlock_irqrestore(&radio->lock, flags);
908 }
909
910 radio->data_available_for_read = 1;
911 wake_up_interruptible(&radio->read_queue);
912}
913
914
915/*
916 * si470x_timer - rds timer function
917 */
918static void si470x_timer(unsigned long data)
919{
920 struct si470x_device *radio = (struct si470x_device *) data;
921
922 schedule_work(&radio->work);
923}
924
925
926/*
927 * si470x_timer - rds work function
928 */
929static void si470x_work(struct work_struct *work)
930{
931 struct si470x_device *radio = container_of(work, struct si470x_device,
932 work);
933
934 if (radio->users == 0)
935 return;
936
937 si470x_rds(radio);
938 mod_timer(&radio->timer, jiffies + msecs_to_jiffies(rds_poll_time));
939}
940
941
942
943/**************************************************************************
944 * USB interface functions
945 **************************************************************************/
946
947/*
948 * si470x_usb_driver_probe - probe for the device
949 */
950static int si470x_usb_driver_probe(struct usb_interface *intf,
951 const struct usb_device_id *id)
952{
953 struct si470x_device *radio;
954
955 if (!(radio = kmalloc(sizeof(struct si470x_device), GFP_KERNEL)))
956 return -ENOMEM;
957 if (!(radio->videodev = video_device_alloc())) {
958 kfree(radio);
959 return -ENOMEM;
960 }
961 memcpy(radio->videodev, &si470x_viddev_template,
962 sizeof(si470x_viddev_template));
963 radio->users = 0;
964 radio->usbdev = interface_to_usbdev(intf);
965 video_set_drvdata(radio->videodev, radio);
966 if (video_register_device(radio->videodev, VFL_TYPE_RADIO, radio_nr)) {
967 printk(KERN_WARNING DRIVER_NAME
968 ": Could not register video device\n");
969 video_device_release(radio->videodev);
970 kfree(radio);
971 return -EIO;
972 }
973 usb_set_intfdata(intf, radio);
974
975 /* show some infos about the specific device */
976 if (si470x_get_all_registers(radio) < 0) {
977 video_device_release(radio->videodev);
978 kfree(radio);
979 return -EIO;
980 }
981 printk(KERN_INFO DRIVER_NAME ": DeviceID=0x%4.4x ChipID=0x%4.4x\n",
982 radio->registers[DEVICEID], radio->registers[CHIPID]);
983
984 /* check if firmware is current */
985 if ((radio->registers[CHIPID] & CHIPID_FIRMWARE)
986 < FMRADIO_SW_VERSION_CURRENT) {
987 printk(KERN_WARNING DRIVER_NAME
988 ": This driver is known to work with chip version %d, "
989 "but the device has firmware %d. If you have some "
990 "trouble using this driver, please report to V4L ML "
991 "at video4linux-list@redhat.com\n",
992 radio->registers[CHIPID] & CHIPID_FIRMWARE,
993 FMRADIO_SW_VERSION_CURRENT);
994 }
995
996 /* set initial frequency */
997 si470x_set_freq(radio, 87.5 * FREQ_MUL); /* available in all regions */
998
999 /* rds initialization */
1000 radio->buf_size = rds_buf * 3;
1001 if (NULL == (radio->buffer = kmalloc(radio->buf_size, GFP_KERNEL))) {
1002 video_device_release(radio->videodev);
1003 kfree(radio);
1004 return -ENOMEM;
1005 }
1006 radio->block_count = 0;
1007 radio->wr_index = 0;
1008 radio->rd_index = 0;
1009 radio->last_blocknum = 0xff;
1010 init_waitqueue_head(&radio->read_queue);
1011 radio->data_available_for_read = 0;
1012
1013 /* prepare polling via eventd */
1014 INIT_WORK(&radio->work, si470x_work);
1015 init_timer(&radio->timer);
1016 radio->timer.function = si470x_timer;
1017 radio->timer.data = (unsigned long) radio;
1018
1019 return 0;
1020}
1021
1022
1023/*
1024 * si470x_usb_driver_disconnect - disconnect the device
1025 */
1026static void si470x_usb_driver_disconnect(struct usb_interface *intf)
1027{
1028 struct si470x_device *radio = usb_get_intfdata(intf);
1029
1030 del_timer_sync(&radio->timer);
1031 flush_scheduled_work();
1032
1033 usb_set_intfdata(intf, NULL);
1034 if (radio) {
1035 video_unregister_device(radio->videodev);
1036 kfree(radio->buffer);
1037 kfree(radio);
1038 }
1039}
1040
1041
1042
1043/**************************************************************************
1044 * Video4Linux interface functions
1045 **************************************************************************/
1046
1047/*
1048 * si470x_fops_read - read RDS data
1049 */
1050static ssize_t si470x_fops_read(struct file *file, char __user *buf,
1051 size_t count, loff_t *ppos)
1052{
1053 struct si470x_device *radio = video_get_drvdata(video_devdata(file));
1054 struct rds_command cmd;
1055 unsigned long flags;
1056 unsigned int i;
1057 unsigned int rd_blocks;
1058
1059 cmd.block_count = count / 3; /* each RDS block needs 3 bytes */
1060 cmd.result = 0;
1061 cmd.buffer = buf;
1062 cmd.instance = file;
1063
1064 /* copy RDS block out of internal buffer */
1065 while (!radio->data_available_for_read) {
1066 if (wait_event_interruptible(radio->read_queue,
1067 radio->data_available_for_read) < 0)
1068 return -EINTR;
1069 }
1070
1071 spin_lock_irqsave(&radio->lock, flags);
1072 rd_blocks = cmd.block_count;
1073 if (rd_blocks > radio->block_count)
1074 rd_blocks = radio->block_count;
1075
1076 if (!rd_blocks) {
1077 spin_unlock_irqrestore(&radio->lock, flags);
1078 return cmd.result;
1079 }
1080
1081 for (i = 0; i < rd_blocks; i++) {
1082 /* copy RDS block to user buffer */
1083 if (radio->rd_index == radio->wr_index)
1084 break;
1085
1086 if (copy_to_user(buf, &radio->buffer[radio->rd_index], 3))
1087 break;
1088
1089 radio->rd_index += 3;
1090 if (radio->rd_index >= radio->buf_size)
1091 radio->rd_index = 0;
1092 radio->block_count--;
1093
1094 buf += 3;
1095 cmd.result += 3;
1096 }
1097 radio->data_available_for_read = (radio->block_count > 0);
1098 spin_unlock_irqrestore(&radio->lock, flags);
1099
1100 return cmd.result;
1101}
1102
1103
1104/*
1105 * si470x_fops_poll - poll RDS data
1106 */
1107static unsigned int si470x_fops_poll(struct file *file,
1108 struct poll_table_struct *pts)
1109{
1110 struct si470x_device *radio = video_get_drvdata(video_devdata(file));
1111 int retval;
1112
1113 retval = 0;
1114 if (radio->data_available_for_read)
1115 retval = POLLIN | POLLRDNORM;
1116 poll_wait(file, &radio->read_queue, pts);
1117
1118 return retval;
1119}
1120
1121
1122/*
1123 * si470x_fops_open - file open
1124 */
1125static int si470x_fops_open(struct inode *inode, struct file *file)
1126{
1127 int retval;
1128 struct si470x_device *radio = video_get_drvdata(video_devdata(file));
1129
1130 radio->users++;
1131 if (radio->users == 1) {
1132 retval = si470x_start(radio);
1133 if (retval < 0)
1134 return retval;
1135
1136 schedule_work(&radio->work);
1137 }
1138
1139 return 0;
1140}
1141
1142
1143/*
1144 * si470x_fops_release - file release
1145 */
1146static int si470x_fops_release(struct inode *inode, struct file *file)
1147{
1148 int retval;
1149 struct si470x_device *radio = video_get_drvdata(video_devdata(file));
1150
1151 if (!radio)
1152 return -ENODEV;
1153
1154 radio->users--;
1155 if (radio->users == 0) {
1156 radio->data_available_for_read = 1; /* ? */
1157 wake_up_interruptible(&radio->read_queue); /* ? */
1158
1159 retval = si470x_stop(radio);
1160 if (retval < 0)
1161 return retval;
1162 }
1163
1164 return 0;
1165}
1166
1167
1168/*
1169 * si470x_vidioc_querycap - query device capabilities
1170 */
1171static int si470x_vidioc_querycap(struct file *file, void *priv,
1172 struct v4l2_capability *capability)
1173{
1174 strlcpy(capability->driver, DRIVER_NAME, sizeof(capability->driver));
1175 strlcpy(capability->card, DRIVER_CARD, sizeof(capability->card));
1176 sprintf(capability->bus_info, "USB");
1177 capability->version = DRIVER_VERSION;
1178 capability->capabilities = V4L2_CAP_TUNER | V4L2_CAP_RADIO;
1179
1180 return 0;
1181}
1182
1183
1184/*
1185 * si470x_vidioc_g_input - get input
1186 */
1187static int si470x_vidioc_g_input(struct file *filp, void *priv,
1188 unsigned int *i)
1189{
1190 *i = 0;
1191
1192 return 0;
1193}
1194
1195
1196/*
1197 * si470x_vidioc_s_input - set input
1198 */
1199static int si470x_vidioc_s_input(struct file *filp, void *priv, unsigned int i)
1200{
1201 if (i != 0)
1202 return -EINVAL;
1203
1204 return 0;
1205}
1206
1207
1208/*
1209 * si470x_vidioc_queryctrl - enumerate control items
1210 */
1211static int si470x_vidioc_queryctrl(struct file *file, void *priv,
1212 struct v4l2_queryctrl *qc)
1213{
1214 int i;
1215
1216 for (i = 0; i < ARRAY_SIZE(radio_queryctrl); i++) {
1217 if (qc->id && qc->id == radio_queryctrl[i].id) {
1218 memcpy(qc, &(radio_queryctrl[i]), sizeof(*qc));
1219 return 0;
1220 }
1221 }
1222
1223 return -EINVAL;
1224}
1225
1226
1227/*
1228 * si470x_vidioc_g_ctrl - get the value of a control
1229 */
1230static int si470x_vidioc_g_ctrl(struct file *file, void *priv,
1231 struct v4l2_control *ctrl)
1232{
1233 struct si470x_device *radio = video_get_drvdata(video_devdata(file));
1234
1235 switch (ctrl->id) {
1236 case V4L2_CID_AUDIO_VOLUME:
1237 ctrl->value = radio->registers[SYSCONFIG2] &
1238 SYSCONFIG2_VOLUME;
1239 break;
1240 case V4L2_CID_AUDIO_MUTE:
1241 ctrl->value = ((radio->registers[POWERCFG] &
1242 POWERCFG_DMUTE) == 0) ? 1 : 0;
1243 break;
1244 }
1245
1246 return 0;
1247}
1248
1249
1250/*
1251 * si470x_vidioc_s_ctrl - set the value of a control
1252 */
1253static int si470x_vidioc_s_ctrl(struct file *file, void *priv,
1254 struct v4l2_control *ctrl)
1255{
1256 struct si470x_device *radio = video_get_drvdata(video_devdata(file));
1257
1258 switch (ctrl->id) {
1259 case V4L2_CID_AUDIO_VOLUME:
1260 radio->registers[SYSCONFIG2] &= ~SYSCONFIG2_VOLUME;
1261 radio->registers[SYSCONFIG2] |= ctrl->value;
1262 return si470x_set_register(radio, SYSCONFIG2);
1263 case V4L2_CID_AUDIO_MUTE:
1264 if (ctrl->value == 1)
1265 radio->registers[POWERCFG] &= ~POWERCFG_DMUTE;
1266 else
1267 radio->registers[POWERCFG] |= POWERCFG_DMUTE;
1268 return si470x_set_register(radio, POWERCFG);
1269 }
1270
1271 return -EINVAL;
1272}
1273
1274
1275/*
1276 * si470x_vidioc_g_audio - get audio attributes
1277 */
1278static int si470x_vidioc_g_audio(struct file *file, void *priv,
1279 struct v4l2_audio *audio)
1280{
1281 if (audio->index > 1)
1282 return -EINVAL;
1283
1284 strcpy(audio->name, "Radio");
1285 audio->capability = V4L2_AUDCAP_STEREO;
1286
1287 return 0;
1288}
1289
1290
1291/*
1292 * si470x_vidioc_s_audio - set audio attributes
1293 */
1294static int si470x_vidioc_s_audio(struct file *file, void *priv,
1295 struct v4l2_audio *audio)
1296{
1297 if (audio->index != 0)
1298 return -EINVAL;
1299
1300 return 0;
1301}
1302
1303
1304/*
1305 * si470x_vidioc_g_tuner - get tuner attributes
1306 */
1307static int si470x_vidioc_g_tuner(struct file *file, void *priv,
1308 struct v4l2_tuner *tuner)
1309{
1310 int retval;
1311 struct si470x_device *radio = video_get_drvdata(video_devdata(file));
1312
1313 if (tuner->index > 0)
1314 return -EINVAL;
1315
1316 /* read status rssi */
1317 retval = si470x_get_register(radio, STATUSRSSI);
1318 if (retval < 0)
1319 return retval;
1320
1321 strcpy(tuner->name, "FM");
1322 tuner->type = V4L2_TUNER_RADIO;
1323 switch(band) {
1324 /* 0: 87.5 - 108 MHz (USA, Europe, default) */
1325 default:
1326 tuner->rangelow = 87.5 * FREQ_MUL;
1327 tuner->rangehigh = 108 * FREQ_MUL;
1328 break;
1329 /* 1: 76 - 108 MHz (Japan wide band) */
1330 case 1 :
1331 tuner->rangelow = 76 * FREQ_MUL;
1332 tuner->rangehigh = 108 * FREQ_MUL;
1333 break;
1334 /* 2: 76 - 90 MHz (Japan) */
1335 case 2 :
1336 tuner->rangelow = 76 * FREQ_MUL;
1337 tuner->rangehigh = 90 * FREQ_MUL;
1338 break;
1339 };
1340 tuner->rxsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO;
1341 tuner->capability = V4L2_TUNER_CAP_LOW;
1342
1343 /* Stereo indicator == Stereo (instead of Mono) */
1344 if ((radio->registers[STATUSRSSI] & STATUSRSSI_ST) == 1)
1345 tuner->audmode = V4L2_TUNER_MODE_STEREO;
1346 else
1347 tuner->audmode = V4L2_TUNER_MODE_MONO;
1348
1349 /* min is worst, max is best; signal:0..0xffff; rssi: 0..0xff */
1350 tuner->signal = (radio->registers[STATUSRSSI] & STATUSRSSI_RSSI)
1351 * 0x0101;
1352
1353 /* automatic frequency control: -1: freq to low, 1 freq to high */
1354 tuner->afc = 0;
1355
1356 return 0;
1357}
1358
1359
1360/*
1361 * si470x_vidioc_s_tuner - set tuner attributes
1362 */
1363static int si470x_vidioc_s_tuner(struct file *file, void *priv,
1364 struct v4l2_tuner *tuner)
1365{
1366 struct si470x_device *radio = video_get_drvdata(video_devdata(file));
1367
1368 if (tuner->index > 0)
1369 return -EINVAL;
1370
1371 if (tuner->audmode == V4L2_TUNER_MODE_MONO)
1372 radio->registers[POWERCFG] |= POWERCFG_MONO; /* force mono */
1373 else
1374 radio->registers[POWERCFG] &= ~POWERCFG_MONO; /* try stereo */
1375
1376 return si470x_set_register(radio, POWERCFG);
1377}
1378
1379
1380/*
1381 * si470x_vidioc_g_frequency - get tuner or modulator radio frequency
1382 */
1383static int si470x_vidioc_g_frequency(struct file *file, void *priv,
1384 struct v4l2_frequency *freq)
1385{
1386 struct si470x_device *radio = video_get_drvdata(video_devdata(file));
1387
1388 freq->type = V4L2_TUNER_RADIO;
1389 freq->frequency = si470x_get_freq(radio);
1390
1391 return 0;
1392}
1393
1394
1395/*
1396 * si470x_vidioc_s_frequency - set tuner or modulator radio frequency
1397 */
1398static int si470x_vidioc_s_frequency(struct file *file, void *priv,
1399 struct v4l2_frequency *freq)
1400{
1401 struct si470x_device *radio = video_get_drvdata(video_devdata(file));
1402
1403 if (freq->type != V4L2_TUNER_RADIO)
1404 return -EINVAL;
1405
1406 return si470x_set_freq(radio, freq->frequency);
1407}
1408
1409
1410
1411/**************************************************************************
1412 * Module interface definitions and functions
1413 **************************************************************************/
1414
1415/*
1416 * si470x_module_init - module init
1417 */
1418static int __init si470x_module_init(void)
1419{
1420 printk(KERN_INFO DRIVER_DESC "\n");
1421 return usb_register(&si470x_usb_driver);
1422}
1423
1424
1425/*
1426 * si470x_module_exit - module exit
1427 */
1428static void __exit si470x_module_exit(void)
1429{
1430 usb_deregister(&si470x_usb_driver);
1431}
1432
1433
1434module_init(si470x_module_init);
1435module_exit(si470x_module_exit);
1436
1437MODULE_LICENSE("GPL");
1438MODULE_AUTHOR(DRIVER_AUTHOR);
1439MODULE_DESCRIPTION(DRIVER_DESC);
1440MODULE_VERSION("1.0.2");
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-12 08:26:13 -0500