drivers/media/radio/si470x/radio-si470x.h

   1 /*
   2  *  drivers/media/radio/si470x/radio-si470x.h
   3  *
   4  *  Driver for radios with Silicon Labs Si470x FM Radio Receivers
   5  *
   6  *  Copyright (c) 2009 Tobias Lorenz <tobias.lorenz@gmx.net>
   7  *
   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.
  12  *
  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.
  17  *
  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
  21  */
  22
  23
  24 /* driver definitions */
  25 #define DRIVER_NAME "radio-si470x"
  26
  27
  28 /* kernel includes */
  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>
  43
  44
  45
  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 */
  52
  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 */
  56
  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 */
  61
  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 */
  72
  73 #define CHANNEL                 3       /* Channel */
  74 #define CHANNEL_TUNE            0x8000  /* bits 15..15: Tune */
  75 #define CHANNEL_CHAN            0x03ff  /* bits 09..00: Channel Select */
  76
  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 */
  87
  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 */
  93
  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 */
  99
 100 #define TEST1                   7       /* Test 1 */
 101 #define TEST1_AHIZEN            0x4000  /* bits 14..14: Audio High-Z Enable */
 102
 103 #define TEST2                   8       /* Test 2 */
 104 /* TEST2 only contains reserved bits */
 105
 106 #define BOOTCONFIG              9       /* Boot Configuration */
 107 /* BOOTCONFIG only contains reserved bits */
 108
 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) */
 118
 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 */
 124
 125 #define RDSA                    12      /* RDSA */
 126 #define RDSA_RDSA               0xffff  /* bits 15..00: RDS Block A Data (Si4701 only) */
 127
 128 #define RDSB                    13      /* RDSB */
 129 #define RDSB_RDSB               0xffff  /* bits 15..00: RDS Block B Data (Si4701 only) */
 130
 131 #define RDSC                    14      /* RDSC */
 132 #define RDSC_RDSC               0xffff  /* bits 15..00: RDS Block C Data (Si4701 only) */
 133
 134 #define RDSD                    15      /* RDSD */
 135 #define RDSD_RDSD               0xffff  /* bits 15..00: RDS Block D Data (Si4701 only) */
 136
 137
 138
 139 /**************************************************************************
 140  * General Driver Definitions
 141  **************************************************************************/
 142
 143 /*
 144  * si470x_device - private data
 145  */
 146 struct si470x_device {
 147         struct v4l2_device v4l2_dev;
 148         struct video_device videodev;
 149         struct v4l2_ctrl_handler hdl;
 150         int band;
 151
 152         /* Silabs internal registers (0..15) */
 153         unsigned short registers[RADIO_REGISTER_NUM];
 154
 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;
 162
 163         struct completion completion;
 164         bool status_rssi_auto_update;   /* Does RSSI get updated automatic? */
 165
 166 #if IS_ENABLED(CONFIG_USB_SI470X)
 167         /* reference to USB and video device */
 168         struct usb_device *usbdev;
 169         struct usb_interface *intf;
 170         char *usb_buf;
 171
 172         /* Interrupt endpoint handling */
 173         char *int_in_buffer;
 174         struct usb_endpoint_descriptor *int_in_endpoint;
 175         struct urb *int_in_urb;
 176         int int_in_running;
 177
 178         /* scratch page */
 179         unsigned char software_version;
 180         unsigned char hardware_version;
 181 #endif
 182
 183 #if IS_ENABLED(CONFIG_I2C_SI470X)
 184         struct i2c_client *client;
 185 #endif
 186 };
 187
 188
 189
 190 /**************************************************************************
 191  * Firmware Versions
 192  **************************************************************************/
 193
 194 #define RADIO_FW_VERSION        12
 195
 196
 197
 198 /**************************************************************************
 199  * Frequency Multiplicator
 200  **************************************************************************/
 201
 202 /*
 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
 208  */
 209 #define FREQ_MUL (1000000 / 62.5)
 210
 211
 212
 213 /**************************************************************************
 214  * Common Functions
 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);