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authorTobias Lorenz <tobias.lorenz@gmx.net>2008-01-14 19:55:27 -0500
committerMauro Carvalho Chehab <mchehab@infradead.org>2008-01-25 16:05:03 -0500
commit78656acdcf4852547a29e929a1b7a98d5ac65f17 (patch)
tree2b408f72aab27e7a981c09f80fadb556c238ee36 /drivers/media/radio
parent438468359e1db16a7d1925fc4f2519a044bbf7dd (diff)
V4L/DVB (7038): USB radio driver for Silicon Labs Si470x FM Radio Receivers
this patch adds a new driver for the Silicon Labs Si470x FM Radio Receiver. It should also work for the identical ADS/Tech FM Radio Receiver (formerly Instant FM Music) as soon as I find out the USB Vendor and Product ID. The driver is inspired by several other USB and radio drivers, but mainly from the D-Link DSB-R100 USB radio (dsbr100.c). The USB stick currently has an Si4701 FM RDS radio receiver. But the other Si470x devices are pin and register compatible, so that in the future the driver can easily be patched to support these too. Therefore I named the driver radio-si470x and the configuration option usb-si470x. The driver itself just provides the control function over the radio. For getting audio back, the device support the USB audio class, which is implemented in the already existing driver. I tested the driver in the last days, until it now satisfies all my functionality and robustness requirements. The application I used for testing was kradio. Signed-off-by: Tobias Lorenz <tobias.lorenz@gmx.net> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
Diffstat (limited to 'drivers/media/radio')
-rw-r--r--drivers/media/radio/Kconfig10
-rw-r--r--drivers/media/radio/Makefile1
-rw-r--r--drivers/media/radio/radio-si470x.c1440
3 files changed, 1451 insertions, 0 deletions
diff --git a/drivers/media/radio/Kconfig b/drivers/media/radio/Kconfig
index 11e962f1a97f..8d5214f18cf0 100644
--- a/drivers/media/radio/Kconfig
+++ b/drivers/media/radio/Kconfig
@@ -351,4 +351,14 @@ config USB_DSBR
351 To compile this driver as a module, choose M here: the 351 To compile this driver as a module, choose M here: the
352 module will be called dsbr100. 352 module will be called dsbr100.
353 353
354config USB_SI470X
355 tristate "Silicon Labs Si470x FM Radio Receiver support"
356 depends on USB && VIDEO_V4L2
357 ---help---
358 Say Y here if you want to connect this type of radio to your
359 computer's USB port.
360
361 To compile this driver as a module, choose M here: the
362 module will be called radio-silabs.
363
354endif # RADIO_ADAPTERS 364endif # RADIO_ADAPTERS
diff --git a/drivers/media/radio/Makefile b/drivers/media/radio/Makefile
index cf55a18e3ddf..f36cf4e63b6c 100644
--- a/drivers/media/radio/Makefile
+++ b/drivers/media/radio/Makefile
@@ -21,5 +21,6 @@ obj-$(CONFIG_RADIO_GEMTEK_PCI) += radio-gemtek-pci.o
21obj-$(CONFIG_RADIO_TRUST) += radio-trust.o 21obj-$(CONFIG_RADIO_TRUST) += radio-trust.o
22obj-$(CONFIG_RADIO_MAESTRO) += radio-maestro.o 22obj-$(CONFIG_RADIO_MAESTRO) += radio-maestro.o
23obj-$(CONFIG_USB_DSBR) += dsbr100.o 23obj-$(CONFIG_USB_DSBR) += dsbr100.o
24obj-$(CONFIG_USB_SI470X) := radio-si470x.o
24 25
25EXTRA_CFLAGS += -Isound 26EXTRA_CFLAGS += -Isound
diff --git a/drivers/media/radio/radio-si470x.c b/drivers/media/radio/radio-si470x.c
new file mode 100644
index 000000000000..eccbc750e140
--- /dev/null
+++ b/drivers/media/radio/radio-si470x.c
@@ -0,0 +1,1440 @@
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 2024-11-26 11:20:10 -0500