drivers/media/usb/ttusb-dec/ttusbdecfe.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * TTUSB DEC Frontend Driver
   4  *
   5  * Copyright (C) 2003-2004 Alex Woods <linux-dvb@giblets.org>
   6  */
   7
   8 #include <media/dvb_frontend.h>
   9 #include "ttusbdecfe.h"
  10
  11
  12 #define LOF_HI                  10600000
  13 #define LOF_LO                  9750000
  14
  15 struct ttusbdecfe_state {
  16
  17         /* configuration settings */
  18         const struct ttusbdecfe_config* config;
  19
  20         struct dvb_frontend frontend;
  21
  22         u8 hi_band;
  23         u8 voltage;
  24 };
  25
  26
  27 static int ttusbdecfe_dvbs_read_status(struct dvb_frontend *fe,
  28                                        enum fe_status *status)
  29 {
  30         *status = FE_HAS_SIGNAL | FE_HAS_VITERBI |
  31                 FE_HAS_SYNC | FE_HAS_CARRIER | FE_HAS_LOCK;
  32         return 0;
  33 }
  34
  35
  36 static int ttusbdecfe_dvbt_read_status(struct dvb_frontend *fe,
  37                                        enum fe_status *status)
  38 {
  39         struct ttusbdecfe_state* state = fe->demodulator_priv;
  40         u8 b[] = { 0x00, 0x00, 0x00, 0x00,
  41                    0x00, 0x00, 0x00, 0x00 };
  42         u8 result[4];
  43         int len, ret;
  44
  45         *status=0;
  46
  47         ret=state->config->send_command(fe, 0x73, sizeof(b), b, &len, result);
  48         if(ret)
  49                 return ret;
  50
  51         if(len != 4) {
  52                 printk(KERN_ERR "%s: unexpected reply\n", __func__);
  53                 return -EIO;
  54         }
  55
  56         switch(result[3]) {
  57                 case 1:  /* not tuned yet */
  58                 case 2:  /* no signal/no lock*/
  59                         break;
  60                 case 3:  /* signal found and locked*/
  61                         *status = FE_HAS_SIGNAL | FE_HAS_VITERBI |
  62                         FE_HAS_SYNC | FE_HAS_CARRIER | FE_HAS_LOCK;
  63                         break;
  64                 case 4:
  65                         *status = FE_TIMEDOUT;
  66                         break;
  67                 default:
  68                         pr_info("%s: returned unknown value: %d\n",
  69                                 __func__, result[3]);
  70                         return -EIO;
  71         }
  72
  73         return 0;
  74 }
  75
  76 static int ttusbdecfe_dvbt_set_frontend(struct dvb_frontend *fe)
  77 {
  78         struct dtv_frontend_properties *p = &fe->dtv_property_cache;
  79         struct ttusbdecfe_state *state = fe->demodulator_priv;
  80         u8 b[] = { 0x00, 0x00, 0x00, 0x03,
  81                    0x00, 0x00, 0x00, 0x00,
  82                    0x00, 0x00, 0x00, 0x01,
  83                    0x00, 0x00, 0x00, 0xff,
  84                    0x00, 0x00, 0x00, 0xff };
  85
  86         __be32 freq = htonl(p->frequency / 1000);
  87         memcpy(&b[4], &freq, sizeof (u32));
  88         state->config->send_command(fe, 0x71, sizeof(b), b, NULL, NULL);
  89
  90         return 0;
  91 }
  92
  93 static int ttusbdecfe_dvbt_get_tune_settings(struct dvb_frontend* fe,
  94                                         struct dvb_frontend_tune_settings* fesettings)
  95 {
  96                 fesettings->min_delay_ms = 1500;
  97                 /* Drift compensation makes no sense for DVB-T */
  98                 fesettings->step_size = 0;
  99                 fesettings->max_drift = 0;
 100                 return 0;
 101 }
 102
 103 static int ttusbdecfe_dvbs_set_frontend(struct dvb_frontend *fe)
 104 {
 105         struct dtv_frontend_properties *p = &fe->dtv_property_cache;
 106         struct ttusbdecfe_state *state = fe->demodulator_priv;
 107
 108         u8 b[] = { 0x00, 0x00, 0x00, 0x01,
 109                    0x00, 0x00, 0x00, 0x00,
 110                    0x00, 0x00, 0x00, 0x01,
 111                    0x00, 0x00, 0x00, 0x00,
 112                    0x00, 0x00, 0x00, 0x00,
 113                    0x00, 0x00, 0x00, 0x00,
 114                    0x00, 0x00, 0x00, 0x00,
 115                    0x00, 0x00, 0x00, 0x00,
 116                    0x00, 0x00, 0x00, 0x00,
 117                    0x00, 0x00, 0x00, 0x00 };
 118         __be32 freq;
 119         __be32 sym_rate;
 120         __be32 band;
 121         __be32 lnb_voltage;
 122
 123         freq = htonl(p->frequency +
 124                (state->hi_band ? LOF_HI : LOF_LO));
 125         memcpy(&b[4], &freq, sizeof(u32));
 126         sym_rate = htonl(p->symbol_rate);
 127         memcpy(&b[12], &sym_rate, sizeof(u32));
 128         band = htonl(state->hi_band ? LOF_HI : LOF_LO);
 129         memcpy(&b[24], &band, sizeof(u32));
 130         lnb_voltage = htonl(state->voltage);
 131         memcpy(&b[28], &lnb_voltage, sizeof(u32));
 132
 133         state->config->send_command(fe, 0x71, sizeof(b), b, NULL, NULL);
 134
 135         return 0;
 136 }
 137
 138 static int ttusbdecfe_dvbs_diseqc_send_master_cmd(struct dvb_frontend* fe, struct dvb_diseqc_master_cmd *cmd)
 139 {
 140         struct ttusbdecfe_state *state = fe->demodulator_priv;
 141         u8 b[] = { 0x00, 0xff, 0x00, 0x00,
 142                    0x00, 0x00, 0x00, 0x00,
 143                    0x00, 0x00 };
 144
 145         if (cmd->msg_len > sizeof(b) - 4)
 146                 return -EINVAL;
 147
 148         memcpy(&b[4], cmd->msg, cmd->msg_len);
 149
 150         state->config->send_command(fe, 0x72,
 151                                     sizeof(b) - (6 - cmd->msg_len), b,
 152                                     NULL, NULL);
 153
 154         return 0;
 155 }
 156
 157
 158 static int ttusbdecfe_dvbs_set_tone(struct dvb_frontend *fe,
 159                                     enum fe_sec_tone_mode tone)
 160 {
 161         struct ttusbdecfe_state *state = fe->demodulator_priv;
 162
 163         state->hi_band = (SEC_TONE_ON == tone);
 164
 165         return 0;
 166 }
 167
 168
 169 static int ttusbdecfe_dvbs_set_voltage(struct dvb_frontend *fe,
 170                                        enum fe_sec_voltage voltage)
 171 {
 172         struct ttusbdecfe_state *state = fe->demodulator_priv;
 173
 174         switch (voltage) {
 175         case SEC_VOLTAGE_13:
 176                 state->voltage = 13;
 177                 break;
 178         case SEC_VOLTAGE_18:
 179                 state->voltage = 18;
 180                 break;
 181         default:
 182                 return -EINVAL;
 183         }
 184
 185         return 0;
 186 }
 187
 188 static void ttusbdecfe_release(struct dvb_frontend* fe)
 189 {
 190         struct ttusbdecfe_state *state = fe->demodulator_priv;
 191         kfree(state);
 192 }
 193
 194 static const struct dvb_frontend_ops ttusbdecfe_dvbt_ops;
 195
 196 struct dvb_frontend* ttusbdecfe_dvbt_attach(const struct ttusbdecfe_config* config)
 197 {
 198         struct ttusbdecfe_state* state = NULL;
 199
 200         /* allocate memory for the internal state */
 201         state = kmalloc(sizeof(struct ttusbdecfe_state), GFP_KERNEL);
 202         if (state == NULL)
 203                 return NULL;
 204
 205         /* setup the state */
 206         state->config = config;
 207
 208         /* create dvb_frontend */
 209         memcpy(&state->frontend.ops, &ttusbdecfe_dvbt_ops, sizeof(struct dvb_frontend_ops));
 210         state->frontend.demodulator_priv = state;
 211         return &state->frontend;
 212 }
 213
 214 static const struct dvb_frontend_ops ttusbdecfe_dvbs_ops;
 215
 216 struct dvb_frontend* ttusbdecfe_dvbs_attach(const struct ttusbdecfe_config* config)
 217 {
 218         struct ttusbdecfe_state* state = NULL;
 219
 220         /* allocate memory for the internal state */
 221         state = kmalloc(sizeof(struct ttusbdecfe_state), GFP_KERNEL);
 222         if (state == NULL)
 223                 return NULL;
 224
 225         /* setup the state */
 226         state->config = config;
 227         state->voltage = 0;
 228         state->hi_band = 0;
 229
 230         /* create dvb_frontend */
 231         memcpy(&state->frontend.ops, &ttusbdecfe_dvbs_ops, sizeof(struct dvb_frontend_ops));
 232         state->frontend.demodulator_priv = state;
 233         return &state->frontend;
 234 }
 235
 236 static const struct dvb_frontend_ops ttusbdecfe_dvbt_ops = {
 237         .delsys = { SYS_DVBT },
 238         .info = {
 239                 .name                   = "TechnoTrend/Hauppauge DEC2000-t Frontend",
 240                 .frequency_min_hz       =  51 * MHz,
 241                 .frequency_max_hz       = 858 * MHz,
 242                 .frequency_stepsize_hz  = 62500,
 243                 .caps = FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
 244                         FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
 245                         FE_CAN_QAM_16 | FE_CAN_QAM_64 | FE_CAN_QAM_AUTO |
 246                         FE_CAN_TRANSMISSION_MODE_AUTO | FE_CAN_GUARD_INTERVAL_AUTO |
 247                         FE_CAN_HIERARCHY_AUTO,
 248         },
 249
 250         .release = ttusbdecfe_release,
 251
 252         .set_frontend = ttusbdecfe_dvbt_set_frontend,
 253
 254         .get_tune_settings = ttusbdecfe_dvbt_get_tune_settings,
 255
 256         .read_status = ttusbdecfe_dvbt_read_status,
 257 };
 258
 259 static const struct dvb_frontend_ops ttusbdecfe_dvbs_ops = {
 260         .delsys = { SYS_DVBS },
 261         .info = {
 262                 .name                   = "TechnoTrend/Hauppauge DEC3000-s Frontend",
 263                 .frequency_min_hz       =  950 * MHz,
 264                 .frequency_max_hz       = 2150 * MHz,
 265                 .frequency_stepsize_hz  =  125 * kHz,
 266                 .symbol_rate_min        = 1000000,  /* guessed */
 267                 .symbol_rate_max        = 45000000, /* guessed */
 268                 .caps = FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
 269                         FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
 270                         FE_CAN_QPSK
 271         },
 272
 273         .release = ttusbdecfe_release,
 274
 275         .set_frontend = ttusbdecfe_dvbs_set_frontend,
 276
 277         .read_status = ttusbdecfe_dvbs_read_status,
 278
 279         .diseqc_send_master_cmd = ttusbdecfe_dvbs_diseqc_send_master_cmd,
 280         .set_voltage = ttusbdecfe_dvbs_set_voltage,
 281         .set_tone = ttusbdecfe_dvbs_set_tone,
 282 };
 283
 284 MODULE_DESCRIPTION("TTUSB DEC DVB-T/S Demodulator driver");
 285 MODULE_AUTHOR("Alex Woods/Andrew de Quincey");
 286 MODULE_LICENSE("GPL");
 287
 288 EXPORT_SYMBOL(ttusbdecfe_dvbt_attach);
 289 EXPORT_SYMBOL(ttusbdecfe_dvbs_attach);