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

   1 /*
   2  * TTUSB DEC Frontend Driver
   3  *
   4  * Copyright (C) 2003-2004 Alex Woods <linux-dvb@giblets.org>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  19  *
  20  */
  21
  22 #include "dvb_frontend.h"
  23 #include "ttusbdecfe.h"
  24
  25
  26 #define LOF_HI                  10600000
  27 #define LOF_LO                  9750000
  28
  29 struct ttusbdecfe_state {
  30
  31         /* configuration settings */
  32         const struct ttusbdecfe_config* config;
  33
  34         struct dvb_frontend frontend;
  35
  36         u8 hi_band;
  37         u8 voltage;
  38 };
  39
  40
  41 static int ttusbdecfe_dvbs_read_status(struct dvb_frontend *fe,
  42         fe_status_t *status)
  43 {
  44         *status = FE_HAS_SIGNAL | FE_HAS_VITERBI |
  45                 FE_HAS_SYNC | FE_HAS_CARRIER | FE_HAS_LOCK;
  46         return 0;
  47 }
  48
  49
  50 static int ttusbdecfe_dvbt_read_status(struct dvb_frontend *fe,
  51         fe_status_t *status)
  52 {
  53         struct ttusbdecfe_state* state = fe->demodulator_priv;
  54         u8 b[] = { 0x00, 0x00, 0x00, 0x00,
  55                    0x00, 0x00, 0x00, 0x00 };
  56         u8 result[4];
  57         int len, ret;
  58
  59         *status=0;
  60
  61         ret=state->config->send_command(fe, 0x73, sizeof(b), b, &len, result);
  62         if(ret)
  63                 return ret;
  64
  65         if(len != 4) {
  66                 printk(KERN_ERR "%s: unexpected reply\n", __func__);
  67                 return -EIO;
  68         }
  69
  70         switch(result[3]) {
  71                 case 1:  /* not tuned yet */
  72                 case 2:  /* no signal/no lock*/
  73                         break;
  74                 case 3:  /* signal found and locked*/
  75                         *status = FE_HAS_SIGNAL | FE_HAS_VITERBI |
  76                         FE_HAS_SYNC | FE_HAS_CARRIER | FE_HAS_LOCK;
  77                         break;
  78                 case 4:
  79                         *status = FE_TIMEDOUT;
  80                         break;
  81                 default:
  82                         pr_info("%s: returned unknown value: %d\n",
  83                                 __func__, result[3]);
  84                         return -EIO;
  85         }
  86
  87         return 0;
  88 }
  89
  90 static int ttusbdecfe_dvbt_set_frontend(struct dvb_frontend* fe, struct dvb_frontend_parameters *p)
  91 {
  92         struct ttusbdecfe_state* state = (struct ttusbdecfe_state*) fe->demodulator_priv;
  93         u8 b[] = { 0x00, 0x00, 0x00, 0x03,
  94                    0x00, 0x00, 0x00, 0x00,
  95                    0x00, 0x00, 0x00, 0x01,
  96                    0x00, 0x00, 0x00, 0xff,
  97                    0x00, 0x00, 0x00, 0xff };
  98
  99         __be32 freq = htonl(p->frequency / 1000);
 100         memcpy(&b[4], &freq, sizeof (u32));
 101         state->config->send_command(fe, 0x71, sizeof(b), b, NULL, NULL);
 102
 103         return 0;
 104 }
 105
 106 static int ttusbdecfe_dvbt_get_tune_settings(struct dvb_frontend* fe,
 107                                         struct dvb_frontend_tune_settings* fesettings)
 108 {
 109                 fesettings->min_delay_ms = 1500;
 110                 /* Drift compensation makes no sense for DVB-T */
 111                 fesettings->step_size = 0;
 112                 fesettings->max_drift = 0;
 113                 return 0;
 114 }
 115
 116 static int ttusbdecfe_dvbs_set_frontend(struct dvb_frontend* fe, struct dvb_frontend_parameters *p)
 117 {
 118         struct ttusbdecfe_state* state = (struct ttusbdecfe_state*) fe->demodulator_priv;
 119
 120         u8 b[] = { 0x00, 0x00, 0x00, 0x01,
 121                    0x00, 0x00, 0x00, 0x00,
 122                    0x00, 0x00, 0x00, 0x01,
 123                    0x00, 0x00, 0x00, 0x00,
 124                    0x00, 0x00, 0x00, 0x00,
 125                    0x00, 0x00, 0x00, 0x00,
 126                    0x00, 0x00, 0x00, 0x00,
 127                    0x00, 0x00, 0x00, 0x00,
 128                    0x00, 0x00, 0x00, 0x00,
 129                    0x00, 0x00, 0x00, 0x00 };
 130         __be32 freq;
 131         __be32 sym_rate;
 132         __be32 band;
 133         __be32 lnb_voltage;
 134
 135         freq = htonl(p->frequency +
 136                (state->hi_band ? LOF_HI : LOF_LO));
 137         memcpy(&b[4], &freq, sizeof(u32));
 138         sym_rate = htonl(p->u.qam.symbol_rate);
 139         memcpy(&b[12], &sym_rate, sizeof(u32));
 140         band = htonl(state->hi_band ? LOF_HI : LOF_LO);
 141         memcpy(&b[24], &band, sizeof(u32));
 142         lnb_voltage = htonl(state->voltage);
 143         memcpy(&b[28], &lnb_voltage, sizeof(u32));
 144
 145         state->config->send_command(fe, 0x71, sizeof(b), b, NULL, NULL);
 146
 147         return 0;
 148 }
 149
 150 static int ttusbdecfe_dvbs_diseqc_send_master_cmd(struct dvb_frontend* fe, struct dvb_diseqc_master_cmd *cmd)
 151 {
 152         struct ttusbdecfe_state* state = (struct ttusbdecfe_state*) fe->demodulator_priv;
 153         u8 b[] = { 0x00, 0xff, 0x00, 0x00,
 154                    0x00, 0x00, 0x00, 0x00,
 155                    0x00, 0x00 };
 156
 157         memcpy(&b[4], cmd->msg, cmd->msg_len);
 158
 159         state->config->send_command(fe, 0x72,
 160                                     sizeof(b) - (6 - cmd->msg_len), b,
 161                                     NULL, NULL);
 162
 163         return 0;
 164 }
 165
 166
 167 static int ttusbdecfe_dvbs_set_tone(struct dvb_frontend* fe, fe_sec_tone_mode_t tone)
 168 {
 169         struct ttusbdecfe_state* state = (struct ttusbdecfe_state*) fe->demodulator_priv;
 170
 171         state->hi_band = (SEC_TONE_ON == tone);
 172
 173         return 0;
 174 }
 175
 176
 177 static int ttusbdecfe_dvbs_set_voltage(struct dvb_frontend* fe, fe_sec_voltage_t voltage)
 178 {
 179         struct ttusbdecfe_state* state = (struct ttusbdecfe_state*) fe->demodulator_priv;
 180
 181         switch (voltage) {
 182         case SEC_VOLTAGE_13:
 183                 state->voltage = 13;
 184                 break;
 185         case SEC_VOLTAGE_18:
 186                 state->voltage = 18;
 187                 break;
 188         default:
 189                 return -EINVAL;
 190         }
 191
 192         return 0;
 193 }
 194
 195 static void ttusbdecfe_release(struct dvb_frontend* fe)
 196 {
 197         struct ttusbdecfe_state* state = (struct ttusbdecfe_state*) fe->demodulator_priv;
 198         kfree(state);
 199 }
 200
 201 static struct dvb_frontend_ops ttusbdecfe_dvbt_ops;
 202
 203 struct dvb_frontend* ttusbdecfe_dvbt_attach(const struct ttusbdecfe_config* config)
 204 {
 205         struct ttusbdecfe_state* state = NULL;
 206
 207         /* allocate memory for the internal state */
 208         state = kmalloc(sizeof(struct ttusbdecfe_state), GFP_KERNEL);
 209         if (state == NULL)
 210                 return NULL;
 211
 212         /* setup the state */
 213         state->config = config;
 214
 215         /* create dvb_frontend */
 216         memcpy(&state->frontend.ops, &ttusbdecfe_dvbt_ops, sizeof(struct dvb_frontend_ops));
 217         state->frontend.demodulator_priv = state;
 218         return &state->frontend;
 219 }
 220
 221 static struct dvb_frontend_ops ttusbdecfe_dvbs_ops;
 222
 223 struct dvb_frontend* ttusbdecfe_dvbs_attach(const struct ttusbdecfe_config* config)
 224 {
 225         struct ttusbdecfe_state* state = NULL;
 226
 227         /* allocate memory for the internal state */
 228         state = kmalloc(sizeof(struct ttusbdecfe_state), GFP_KERNEL);
 229         if (state == NULL)
 230                 return NULL;
 231
 232         /* setup the state */
 233         state->config = config;
 234         state->voltage = 0;
 235         state->hi_band = 0;
 236
 237         /* create dvb_frontend */
 238         memcpy(&state->frontend.ops, &ttusbdecfe_dvbs_ops, sizeof(struct dvb_frontend_ops));
 239         state->frontend.demodulator_priv = state;
 240         return &state->frontend;
 241 }
 242
 243 static struct dvb_frontend_ops ttusbdecfe_dvbt_ops = {
 244
 245         .info = {
 246                 .name                   = "TechnoTrend/Hauppauge DEC2000-t Frontend",
 247                 .type                   = FE_OFDM,
 248                 .frequency_min          = 51000000,
 249                 .frequency_max          = 858000000,
 250                 .frequency_stepsize     = 62500,
 251                 .caps = FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
 252                         FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
 253                         FE_CAN_QAM_16 | FE_CAN_QAM_64 | FE_CAN_QAM_AUTO |
 254                         FE_CAN_TRANSMISSION_MODE_AUTO | FE_CAN_GUARD_INTERVAL_AUTO |
 255                         FE_CAN_HIERARCHY_AUTO,
 256         },
 257
 258         .release = ttusbdecfe_release,
 259
 260         .set_frontend = ttusbdecfe_dvbt_set_frontend,
 261
 262         .get_tune_settings = ttusbdecfe_dvbt_get_tune_settings,
 263
 264         .read_status = ttusbdecfe_dvbt_read_status,
 265 };
 266
 267 static struct dvb_frontend_ops ttusbdecfe_dvbs_ops = {
 268
 269         .info = {
 270                 .name                   = "TechnoTrend/Hauppauge DEC3000-s Frontend",
 271                 .type                   = FE_QPSK,
 272                 .frequency_min          = 950000,
 273                 .frequency_max          = 2150000,
 274                 .frequency_stepsize     = 125,
 275                 .symbol_rate_min        = 1000000,  /* guessed */
 276                 .symbol_rate_max        = 45000000, /* guessed */
 277                 .caps = FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
 278                         FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
 279                         FE_CAN_QPSK
 280         },
 281
 282         .release = ttusbdecfe_release,
 283
 284         .set_frontend = ttusbdecfe_dvbs_set_frontend,
 285
 286         .read_status = ttusbdecfe_dvbs_read_status,
 287
 288         .diseqc_send_master_cmd = ttusbdecfe_dvbs_diseqc_send_master_cmd,
 289         .set_voltage = ttusbdecfe_dvbs_set_voltage,
 290         .set_tone = ttusbdecfe_dvbs_set_tone,
 291 };
 292
 293 MODULE_DESCRIPTION("TTUSB DEC DVB-T/S Demodulator driver");
 294 MODULE_AUTHOR("Alex Woods/Andrew de Quincey");
 295 MODULE_LICENSE("GPL");
 296
 297 EXPORT_SYMBOL(ttusbdecfe_dvbt_attach);
 298 EXPORT_SYMBOL(ttusbdecfe_dvbs_attach);