2 * drivers/media/radio/si470x/radio-si470x.h
4 * Driver for radios with Silicon Labs Si470x FM Radio Receivers
6 * Copyright (c) 2009 Tobias Lorenz <tobias.lorenz@gmx.net>
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24 /* driver definitions */
25 #define DRIVER_NAME "radio-si470x"
29 #include <linux/kernel.h>
30 #include <linux/module.h>
31 #include <linux/init.h>
32 #include <linux/sched.h>
33 #include <linux/slab.h>
34 #include <linux/input.h>
35 #include <linux/videodev2.h>
36 #include <linux/mutex.h>
37 #include <media/v4l2-common.h>
38 #include <media/v4l2-ioctl.h>
39 #include <media/v4l2-ctrls.h>
40 #include <media/v4l2-event.h>
41 #include <media/v4l2-device.h>
42 #include <asm/unaligned.h>
46 /**************************************************************************
47 * Register Definitions
48 **************************************************************************/
49 #define RADIO_REGISTER_SIZE 2 /* 16 register bit width */
50 #define RADIO_REGISTER_NUM 16 /* DEVICEID ... RDSD */
51 #define RDS_REGISTER_NUM 6 /* STATUSRSSI ... RDSD */
53 #define DEVICEID 0 /* Device ID */
54 #define DEVICEID_PN 0xf000 /* bits 15..12: Part Number */
55 #define DEVICEID_MFGID 0x0fff /* bits 11..00: Manufacturer ID */
57 #define SI_CHIPID 1 /* Chip ID */
58 #define SI_CHIPID_REV 0xfc00 /* bits 15..10: Chip Version */
59 #define SI_CHIPID_DEV 0x0200 /* bits 09..09: Device */
60 #define SI_CHIPID_FIRMWARE 0x01ff /* bits 08..00: Firmware Version */
62 #define POWERCFG 2 /* Power Configuration */
63 #define POWERCFG_DSMUTE 0x8000 /* bits 15..15: Softmute Disable */
64 #define POWERCFG_DMUTE 0x4000 /* bits 14..14: Mute Disable */
65 #define POWERCFG_MONO 0x2000 /* bits 13..13: Mono Select */
66 #define POWERCFG_RDSM 0x0800 /* bits 11..11: RDS Mode (Si4701 only) */
67 #define POWERCFG_SKMODE 0x0400 /* bits 10..10: Seek Mode */
68 #define POWERCFG_SEEKUP 0x0200 /* bits 09..09: Seek Direction */
69 #define POWERCFG_SEEK 0x0100 /* bits 08..08: Seek */
70 #define POWERCFG_DISABLE 0x0040 /* bits 06..06: Powerup Disable */
71 #define POWERCFG_ENABLE 0x0001 /* bits 00..00: Powerup Enable */
73 #define CHANNEL 3 /* Channel */
74 #define CHANNEL_TUNE 0x8000 /* bits 15..15: Tune */
75 #define CHANNEL_CHAN 0x03ff /* bits 09..00: Channel Select */
77 #define SYSCONFIG1 4 /* System Configuration 1 */
78 #define SYSCONFIG1_RDSIEN 0x8000 /* bits 15..15: RDS Interrupt Enable (Si4701 only) */
79 #define SYSCONFIG1_STCIEN 0x4000 /* bits 14..14: Seek/Tune Complete Interrupt Enable */
80 #define SYSCONFIG1_RDS 0x1000 /* bits 12..12: RDS Enable (Si4701 only) */
81 #define SYSCONFIG1_DE 0x0800 /* bits 11..11: De-emphasis (0=75us 1=50us) */
82 #define SYSCONFIG1_AGCD 0x0400 /* bits 10..10: AGC Disable */
83 #define SYSCONFIG1_BLNDADJ 0x00c0 /* bits 07..06: Stereo/Mono Blend Level Adjustment */
84 #define SYSCONFIG1_GPIO3 0x0030 /* bits 05..04: General Purpose I/O 3 */
85 #define SYSCONFIG1_GPIO2 0x000c /* bits 03..02: General Purpose I/O 2 */
86 #define SYSCONFIG1_GPIO1 0x0003 /* bits 01..00: General Purpose I/O 1 */
88 #define SYSCONFIG2 5 /* System Configuration 2 */
89 #define SYSCONFIG2_SEEKTH 0xff00 /* bits 15..08: RSSI Seek Threshold */
90 #define SYSCONFIG2_BAND 0x00c0 /* bits 07..06: Band Select */
91 #define SYSCONFIG2_SPACE 0x0030 /* bits 05..04: Channel Spacing */
92 #define SYSCONFIG2_VOLUME 0x000f /* bits 03..00: Volume */
94 #define SYSCONFIG3 6 /* System Configuration 3 */
95 #define SYSCONFIG3_SMUTER 0xc000 /* bits 15..14: Softmute Attack/Recover Rate */
96 #define SYSCONFIG3_SMUTEA 0x3000 /* bits 13..12: Softmute Attenuation */
97 #define SYSCONFIG3_SKSNR 0x00f0 /* bits 07..04: Seek SNR Threshold */
98 #define SYSCONFIG3_SKCNT 0x000f /* bits 03..00: Seek FM Impulse Detection Threshold */
100 #define TEST1 7 /* Test 1 */
101 #define TEST1_AHIZEN 0x4000 /* bits 14..14: Audio High-Z Enable */
103 #define TEST2 8 /* Test 2 */
104 /* TEST2 only contains reserved bits */
106 #define BOOTCONFIG 9 /* Boot Configuration */
107 /* BOOTCONFIG only contains reserved bits */
109 #define STATUSRSSI 10 /* Status RSSI */
110 #define STATUSRSSI_RDSR 0x8000 /* bits 15..15: RDS Ready (Si4701 only) */
111 #define STATUSRSSI_STC 0x4000 /* bits 14..14: Seek/Tune Complete */
112 #define STATUSRSSI_SF 0x2000 /* bits 13..13: Seek Fail/Band Limit */
113 #define STATUSRSSI_AFCRL 0x1000 /* bits 12..12: AFC Rail */
114 #define STATUSRSSI_RDSS 0x0800 /* bits 11..11: RDS Synchronized (Si4701 only) */
115 #define STATUSRSSI_BLERA 0x0600 /* bits 10..09: RDS Block A Errors (Si4701 only) */
116 #define STATUSRSSI_ST 0x0100 /* bits 08..08: Stereo Indicator */
117 #define STATUSRSSI_RSSI 0x00ff /* bits 07..00: RSSI (Received Signal Strength Indicator) */
119 #define READCHAN 11 /* Read Channel */
120 #define READCHAN_BLERB 0xc000 /* bits 15..14: RDS Block D Errors (Si4701 only) */
121 #define READCHAN_BLERC 0x3000 /* bits 13..12: RDS Block C Errors (Si4701 only) */
122 #define READCHAN_BLERD 0x0c00 /* bits 11..10: RDS Block B Errors (Si4701 only) */
123 #define READCHAN_READCHAN 0x03ff /* bits 09..00: Read Channel */
125 #define RDSA 12 /* RDSA */
126 #define RDSA_RDSA 0xffff /* bits 15..00: RDS Block A Data (Si4701 only) */
128 #define RDSB 13 /* RDSB */
129 #define RDSB_RDSB 0xffff /* bits 15..00: RDS Block B Data (Si4701 only) */
131 #define RDSC 14 /* RDSC */
132 #define RDSC_RDSC 0xffff /* bits 15..00: RDS Block C Data (Si4701 only) */
134 #define RDSD 15 /* RDSD */
135 #define RDSD_RDSD 0xffff /* bits 15..00: RDS Block D Data (Si4701 only) */
139 /**************************************************************************
140 * General Driver Definitions
141 **************************************************************************/
144 * si470x_device - private data
146 struct si470x_device {
147 struct v4l2_device v4l2_dev;
148 struct video_device videodev;
149 struct v4l2_ctrl_handler hdl;
152 /* Silabs internal registers (0..15) */
153 unsigned short registers[RADIO_REGISTER_NUM];
155 /* RDS receive buffer */
156 wait_queue_head_t read_queue;
157 struct mutex lock; /* buffer locking */
158 unsigned char *buffer; /* size is always multiple of three */
159 unsigned int buf_size;
160 unsigned int rd_index;
161 unsigned int wr_index;
163 struct completion completion;
164 bool status_rssi_auto_update; /* Does RSSI get updated automatic? */
166 #if IS_ENABLED(CONFIG_USB_SI470X)
167 /* reference to USB and video device */
168 struct usb_device *usbdev;
169 struct usb_interface *intf;
172 /* Interrupt endpoint handling */
174 struct usb_endpoint_descriptor *int_in_endpoint;
175 struct urb *int_in_urb;
179 unsigned char software_version;
180 unsigned char hardware_version;
183 #if IS_ENABLED(CONFIG_I2C_SI470X)
184 struct i2c_client *client;
190 /**************************************************************************
192 **************************************************************************/
194 #define RADIO_FW_VERSION 12
198 /**************************************************************************
199 * Frequency Multiplicator
200 **************************************************************************/
203 * The frequency is set in units of 62.5 Hz when using V4L2_TUNER_CAP_LOW,
204 * 62.5 kHz otherwise.
205 * The tuner is able to have a channel spacing of 50, 100 or 200 kHz.
206 * tuner->capability is therefore set to V4L2_TUNER_CAP_LOW
207 * The FREQ_MUL is then: 1 MHz / 62.5 Hz = 16000
209 #define FREQ_MUL (1000000 / 62.5)
213 /**************************************************************************
215 **************************************************************************/
216 extern struct video_device si470x_viddev_template;
217 extern const struct v4l2_ctrl_ops si470x_ctrl_ops;
218 int si470x_get_register(struct si470x_device *radio, int regnr);
219 int si470x_set_register(struct si470x_device *radio, int regnr);
220 int si470x_disconnect_check(struct si470x_device *radio);
221 int si470x_set_freq(struct si470x_device *radio, unsigned int freq);
222 int si470x_start(struct si470x_device *radio);
223 int si470x_stop(struct si470x_device *radio);
224 int si470x_fops_open(struct file *file);
225 int si470x_fops_release(struct file *file);
226 int si470x_vidioc_querycap(struct file *file, void *priv,
227 struct v4l2_capability *capability);