kernel/drivers/media/dvb-frontends/dvb_dummy_fe.c

   1 /*
   2  *  Driver for Dummy Frontend
   3  *
   4  *  Written by Emard <emard@softhome.net>
   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  *
  15  *  GNU General Public License for more details.
  16  *
  17  *  You should have received a copy of the GNU General Public License
  18  *  along with this program; if not, write to the Free Software
  19  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.=
  20  */
  21
  22 #include <linux/module.h>
  23 #include <linux/init.h>
  24 #include <linux/string.h>
  25 #include <linux/slab.h>
  26
  27 #include "dvb_frontend.h"
  28 #include "dvb_dummy_fe.h"
  29
  30
  31 struct dvb_dummy_fe_state {
  32         struct dvb_frontend frontend;
  33 };
  34
  35
  36 static int dvb_dummy_fe_read_status(struct dvb_frontend *fe,
  37                                     enum fe_status *status)
  38 {
  39         *status = FE_HAS_SIGNAL
  40                 | FE_HAS_CARRIER
  41                 | FE_HAS_VITERBI
  42                 | FE_HAS_SYNC
  43                 | FE_HAS_LOCK;
  44
  45         return 0;
  46 }
  47
  48 static int dvb_dummy_fe_read_ber(struct dvb_frontend* fe, u32* ber)
  49 {
  50         *ber = 0;
  51         return 0;
  52 }
  53
  54 static int dvb_dummy_fe_read_signal_strength(struct dvb_frontend* fe, u16* strength)
  55 {
  56         *strength = 0;
  57         return 0;
  58 }
  59
  60 static int dvb_dummy_fe_read_snr(struct dvb_frontend* fe, u16* snr)
  61 {
  62         *snr = 0;
  63         return 0;
  64 }
  65
  66 static int dvb_dummy_fe_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks)
  67 {
  68         *ucblocks = 0;
  69         return 0;
  70 }
  71
  72 /*
  73  * Only needed if it actually reads something from the hardware
  74  */
  75 static int dvb_dummy_fe_get_frontend(struct dvb_frontend *fe)
  76 {
  77         return 0;
  78 }
  79
  80 static int dvb_dummy_fe_set_frontend(struct dvb_frontend *fe)
  81 {
  82         if (fe->ops.tuner_ops.set_params) {
  83                 fe->ops.tuner_ops.set_params(fe);
  84                 if (fe->ops.i2c_gate_ctrl)
  85                         fe->ops.i2c_gate_ctrl(fe, 0);
  86         }
  87
  88         return 0;
  89 }
  90
  91 static int dvb_dummy_fe_sleep(struct dvb_frontend* fe)
  92 {
  93         return 0;
  94 }
  95
  96 static int dvb_dummy_fe_init(struct dvb_frontend* fe)
  97 {
  98         return 0;
  99 }
 100
 101 static int dvb_dummy_fe_set_tone(struct dvb_frontend *fe,
 102                                  enum fe_sec_tone_mode tone)
 103 {
 104         return 0;
 105 }
 106
 107 static int dvb_dummy_fe_set_voltage(struct dvb_frontend *fe,
 108                                     enum fe_sec_voltage voltage)
 109 {
 110         return 0;
 111 }
 112
 113 static void dvb_dummy_fe_release(struct dvb_frontend* fe)
 114 {
 115         struct dvb_dummy_fe_state* state = fe->demodulator_priv;
 116         kfree(state);
 117 }
 118
 119 static struct dvb_frontend_ops dvb_dummy_fe_ofdm_ops;
 120
 121 struct dvb_frontend* dvb_dummy_fe_ofdm_attach(void)
 122 {
 123         struct dvb_dummy_fe_state* state = NULL;
 124
 125         /* allocate memory for the internal state */
 126         state = kzalloc(sizeof(struct dvb_dummy_fe_state), GFP_KERNEL);
 127         if (!state)
 128                 return NULL;
 129
 130         /* create dvb_frontend */
 131         memcpy(&state->frontend.ops, &dvb_dummy_fe_ofdm_ops, sizeof(struct dvb_frontend_ops));
 132         state->frontend.demodulator_priv = state;
 133         return &state->frontend;
 134 }
 135
 136 static struct dvb_frontend_ops dvb_dummy_fe_qpsk_ops;
 137
 138 struct dvb_frontend *dvb_dummy_fe_qpsk_attach(void)
 139 {
 140         struct dvb_dummy_fe_state* state = NULL;
 141
 142         /* allocate memory for the internal state */
 143         state = kzalloc(sizeof(struct dvb_dummy_fe_state), GFP_KERNEL);
 144         if (!state)
 145                 return NULL;
 146
 147         /* create dvb_frontend */
 148         memcpy(&state->frontend.ops, &dvb_dummy_fe_qpsk_ops, sizeof(struct dvb_frontend_ops));
 149         state->frontend.demodulator_priv = state;
 150         return &state->frontend;
 151 }
 152
 153 static struct dvb_frontend_ops dvb_dummy_fe_qam_ops;
 154
 155 struct dvb_frontend *dvb_dummy_fe_qam_attach(void)
 156 {
 157         struct dvb_dummy_fe_state* state = NULL;
 158
 159         /* allocate memory for the internal state */
 160         state = kzalloc(sizeof(struct dvb_dummy_fe_state), GFP_KERNEL);
 161         if (!state)
 162                 return NULL;
 163
 164         /* create dvb_frontend */
 165         memcpy(&state->frontend.ops, &dvb_dummy_fe_qam_ops, sizeof(struct dvb_frontend_ops));
 166         state->frontend.demodulator_priv = state;
 167         return &state->frontend;
 168 }
 169
 170 static struct dvb_frontend_ops dvb_dummy_fe_ofdm_ops = {
 171         .delsys = { SYS_DVBT },
 172         .info = {
 173                 .name                   = "Dummy DVB-T",
 174                 .frequency_min          = 0,
 175                 .frequency_max          = 863250000,
 176                 .frequency_stepsize     = 62500,
 177                 .caps = FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
 178                                 FE_CAN_FEC_4_5 | FE_CAN_FEC_5_6 | FE_CAN_FEC_6_7 |
 179                                 FE_CAN_FEC_7_8 | FE_CAN_FEC_8_9 | FE_CAN_FEC_AUTO |
 180                                 FE_CAN_QAM_16 | FE_CAN_QAM_64 | FE_CAN_QAM_AUTO |
 181                                 FE_CAN_TRANSMISSION_MODE_AUTO |
 182                                 FE_CAN_GUARD_INTERVAL_AUTO |
 183                                 FE_CAN_HIERARCHY_AUTO,
 184         },
 185
 186         .release = dvb_dummy_fe_release,
 187
 188         .init = dvb_dummy_fe_init,
 189         .sleep = dvb_dummy_fe_sleep,
 190
 191         .set_frontend = dvb_dummy_fe_set_frontend,
 192         .get_frontend = dvb_dummy_fe_get_frontend,
 193
 194         .read_status = dvb_dummy_fe_read_status,
 195         .read_ber = dvb_dummy_fe_read_ber,
 196         .read_signal_strength = dvb_dummy_fe_read_signal_strength,
 197         .read_snr = dvb_dummy_fe_read_snr,
 198         .read_ucblocks = dvb_dummy_fe_read_ucblocks,
 199 };
 200
 201 static struct dvb_frontend_ops dvb_dummy_fe_qam_ops = {
 202         .delsys = { SYS_DVBC_ANNEX_A },
 203         .info = {
 204                 .name                   = "Dummy DVB-C",
 205                 .frequency_stepsize     = 62500,
 206                 .frequency_min          = 51000000,
 207                 .frequency_max          = 858000000,
 208                 .symbol_rate_min        = (57840000/2)/64,     /* SACLK/64 == (XIN/2)/64 */
 209                 .symbol_rate_max        = (57840000/2)/4,      /* SACLK/4 */
 210                 .caps = FE_CAN_QAM_16 | FE_CAN_QAM_32 | FE_CAN_QAM_64 |
 211                         FE_CAN_QAM_128 | FE_CAN_QAM_256 |
 212                         FE_CAN_FEC_AUTO | FE_CAN_INVERSION_AUTO
 213         },
 214
 215         .release = dvb_dummy_fe_release,
 216
 217         .init = dvb_dummy_fe_init,
 218         .sleep = dvb_dummy_fe_sleep,
 219
 220         .set_frontend = dvb_dummy_fe_set_frontend,
 221         .get_frontend = dvb_dummy_fe_get_frontend,
 222
 223         .read_status = dvb_dummy_fe_read_status,
 224         .read_ber = dvb_dummy_fe_read_ber,
 225         .read_signal_strength = dvb_dummy_fe_read_signal_strength,
 226         .read_snr = dvb_dummy_fe_read_snr,
 227         .read_ucblocks = dvb_dummy_fe_read_ucblocks,
 228 };
 229
 230 static struct dvb_frontend_ops dvb_dummy_fe_qpsk_ops = {
 231         .delsys = { SYS_DVBS },
 232         .info = {
 233                 .name                   = "Dummy DVB-S",
 234                 .frequency_min          = 950000,
 235                 .frequency_max          = 2150000,
 236                 .frequency_stepsize     = 250,           /* kHz for QPSK frontends */
 237                 .frequency_tolerance    = 29500,
 238                 .symbol_rate_min        = 1000000,
 239                 .symbol_rate_max        = 45000000,
 240                 .caps = FE_CAN_INVERSION_AUTO |
 241                         FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
 242                         FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
 243                         FE_CAN_QPSK
 244         },
 245
 246         .release = dvb_dummy_fe_release,
 247
 248         .init = dvb_dummy_fe_init,
 249         .sleep = dvb_dummy_fe_sleep,
 250
 251         .set_frontend = dvb_dummy_fe_set_frontend,
 252         .get_frontend = dvb_dummy_fe_get_frontend,
 253
 254         .read_status = dvb_dummy_fe_read_status,
 255         .read_ber = dvb_dummy_fe_read_ber,
 256         .read_signal_strength = dvb_dummy_fe_read_signal_strength,
 257         .read_snr = dvb_dummy_fe_read_snr,
 258         .read_ucblocks = dvb_dummy_fe_read_ucblocks,
 259
 260         .set_voltage = dvb_dummy_fe_set_voltage,
 261         .set_tone = dvb_dummy_fe_set_tone,
 262 };
 263
 264 MODULE_DESCRIPTION("DVB DUMMY Frontend");
 265 MODULE_AUTHOR("Emard");
 266 MODULE_LICENSE("GPL");
 267
 268 EXPORT_SYMBOL(dvb_dummy_fe_ofdm_attach);
 269 EXPORT_SYMBOL(dvb_dummy_fe_qam_attach);
 270 EXPORT_SYMBOL(dvb_dummy_fe_qpsk_attach);