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