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  * Should only be implemented if it actually reads something from the hardware.
  74  * Also, it should check for the locks, in order to avoid report wrong data
  75  * to userspace.
  76  */
  77 static int dvb_dummy_fe_get_frontend(struct dvb_frontend *fe,
  78                                      struct dtv_frontend_properties *p)
  79 {
  80         return 0;
  81 }
  82
  83 static int dvb_dummy_fe_set_frontend(struct dvb_frontend *fe)
  84 {
  85         if (fe->ops.tuner_ops.set_params) {
  86                 fe->ops.tuner_ops.set_params(fe);
  87                 if (fe->ops.i2c_gate_ctrl)
  88                         fe->ops.i2c_gate_ctrl(fe, 0);
  89         }
  90
  91         return 0;
  92 }
  93
  94 static int dvb_dummy_fe_sleep(struct dvb_frontend* fe)
  95 {
  96         return 0;
  97 }
  98
  99 static int dvb_dummy_fe_init(struct dvb_frontend* fe)
 100 {
 101         return 0;
 102 }
 103
 104 static int dvb_dummy_fe_set_tone(struct dvb_frontend *fe,
 105                                  enum fe_sec_tone_mode tone)
 106 {
 107         return 0;
 108 }
 109
 110 static int dvb_dummy_fe_set_voltage(struct dvb_frontend *fe,
 111                                     enum fe_sec_voltage voltage)
 112 {
 113         return 0;
 114 }
 115
 116 static void dvb_dummy_fe_release(struct dvb_frontend* fe)
 117 {
 118         struct dvb_dummy_fe_state* state = fe->demodulator_priv;
 119         kfree(state);
 120 }
 121
 122 static const struct dvb_frontend_ops dvb_dummy_fe_ofdm_ops;
 123
 124 struct dvb_frontend* dvb_dummy_fe_ofdm_attach(void)
 125 {
 126         struct dvb_dummy_fe_state* state = NULL;
 127
 128         /* allocate memory for the internal state */
 129         state = kzalloc(sizeof(struct dvb_dummy_fe_state), GFP_KERNEL);
 130         if (!state)
 131                 return NULL;
 132
 133         /* create dvb_frontend */
 134         memcpy(&state->frontend.ops, &dvb_dummy_fe_ofdm_ops, sizeof(struct dvb_frontend_ops));
 135         state->frontend.demodulator_priv = state;
 136         return &state->frontend;
 137 }
 138
 139 static const struct dvb_frontend_ops dvb_dummy_fe_qpsk_ops;
 140
 141 struct dvb_frontend *dvb_dummy_fe_qpsk_attach(void)
 142 {
 143         struct dvb_dummy_fe_state* state = NULL;
 144
 145         /* allocate memory for the internal state */
 146         state = kzalloc(sizeof(struct dvb_dummy_fe_state), GFP_KERNEL);
 147         if (!state)
 148                 return NULL;
 149
 150         /* create dvb_frontend */
 151         memcpy(&state->frontend.ops, &dvb_dummy_fe_qpsk_ops, sizeof(struct dvb_frontend_ops));
 152         state->frontend.demodulator_priv = state;
 153         return &state->frontend;
 154 }
 155
 156 static const struct dvb_frontend_ops dvb_dummy_fe_qam_ops;
 157
 158 struct dvb_frontend *dvb_dummy_fe_qam_attach(void)
 159 {
 160         struct dvb_dummy_fe_state* state = NULL;
 161
 162         /* allocate memory for the internal state */
 163         state = kzalloc(sizeof(struct dvb_dummy_fe_state), GFP_KERNEL);
 164         if (!state)
 165                 return NULL;
 166
 167         /* create dvb_frontend */
 168         memcpy(&state->frontend.ops, &dvb_dummy_fe_qam_ops, sizeof(struct dvb_frontend_ops));
 169         state->frontend.demodulator_priv = state;
 170         return &state->frontend;
 171 }
 172
 173 static const struct dvb_frontend_ops dvb_dummy_fe_ofdm_ops = {
 174         .delsys = { SYS_DVBT },
 175         .info = {
 176                 .name                   = "Dummy DVB-T",
 177                 .frequency_min          = 0,
 178                 .frequency_max          = 863250000,
 179                 .frequency_stepsize     = 62500,
 180                 .caps = FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
 181                                 FE_CAN_FEC_4_5 | FE_CAN_FEC_5_6 | FE_CAN_FEC_6_7 |
 182                                 FE_CAN_FEC_7_8 | FE_CAN_FEC_8_9 | FE_CAN_FEC_AUTO |
 183                                 FE_CAN_QAM_16 | FE_CAN_QAM_64 | FE_CAN_QAM_AUTO |
 184                                 FE_CAN_TRANSMISSION_MODE_AUTO |
 185                                 FE_CAN_GUARD_INTERVAL_AUTO |
 186                                 FE_CAN_HIERARCHY_AUTO,
 187         },
 188
 189         .release = dvb_dummy_fe_release,
 190
 191         .init = dvb_dummy_fe_init,
 192         .sleep = dvb_dummy_fe_sleep,
 193
 194         .set_frontend = dvb_dummy_fe_set_frontend,
 195         .get_frontend = dvb_dummy_fe_get_frontend,
 196
 197         .read_status = dvb_dummy_fe_read_status,
 198         .read_ber = dvb_dummy_fe_read_ber,
 199         .read_signal_strength = dvb_dummy_fe_read_signal_strength,
 200         .read_snr = dvb_dummy_fe_read_snr,
 201         .read_ucblocks = dvb_dummy_fe_read_ucblocks,
 202 };
 203
 204 static const struct dvb_frontend_ops dvb_dummy_fe_qam_ops = {
 205         .delsys = { SYS_DVBC_ANNEX_A },
 206         .info = {
 207                 .name                   = "Dummy DVB-C",
 208                 .frequency_stepsize     = 62500,
 209                 .frequency_min          = 51000000,
 210                 .frequency_max          = 858000000,
 211                 .symbol_rate_min        = (57840000/2)/64,     /* SACLK/64 == (XIN/2)/64 */
 212                 .symbol_rate_max        = (57840000/2)/4,      /* SACLK/4 */
 213                 .caps = FE_CAN_QAM_16 | FE_CAN_QAM_32 | FE_CAN_QAM_64 |
 214                         FE_CAN_QAM_128 | FE_CAN_QAM_256 |
 215                         FE_CAN_FEC_AUTO | FE_CAN_INVERSION_AUTO
 216         },
 217
 218         .release = dvb_dummy_fe_release,
 219
 220         .init = dvb_dummy_fe_init,
 221         .sleep = dvb_dummy_fe_sleep,
 222
 223         .set_frontend = dvb_dummy_fe_set_frontend,
 224         .get_frontend = dvb_dummy_fe_get_frontend,
 225
 226         .read_status = dvb_dummy_fe_read_status,
 227         .read_ber = dvb_dummy_fe_read_ber,
 228         .read_signal_strength = dvb_dummy_fe_read_signal_strength,
 229         .read_snr = dvb_dummy_fe_read_snr,
 230         .read_ucblocks = dvb_dummy_fe_read_ucblocks,
 231 };
 232
 233 static const struct dvb_frontend_ops dvb_dummy_fe_qpsk_ops = {
 234         .delsys = { SYS_DVBS },
 235         .info = {
 236                 .name                   = "Dummy DVB-S",
 237                 .frequency_min          = 950000,
 238                 .frequency_max          = 2150000,
 239                 .frequency_stepsize     = 250,           /* kHz for QPSK frontends */
 240                 .frequency_tolerance    = 29500,
 241                 .symbol_rate_min        = 1000000,
 242                 .symbol_rate_max        = 45000000,
 243                 .caps = FE_CAN_INVERSION_AUTO |
 244                         FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
 245                         FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
 246                         FE_CAN_QPSK
 247         },
 248
 249         .release = dvb_dummy_fe_release,
 250
 251         .init = dvb_dummy_fe_init,
 252         .sleep = dvb_dummy_fe_sleep,
 253
 254         .set_frontend = dvb_dummy_fe_set_frontend,
 255         .get_frontend = dvb_dummy_fe_get_frontend,
 256
 257         .read_status = dvb_dummy_fe_read_status,
 258         .read_ber = dvb_dummy_fe_read_ber,
 259         .read_signal_strength = dvb_dummy_fe_read_signal_strength,
 260         .read_snr = dvb_dummy_fe_read_snr,
 261         .read_ucblocks = dvb_dummy_fe_read_ucblocks,
 262
 263         .set_voltage = dvb_dummy_fe_set_voltage,
 264         .set_tone = dvb_dummy_fe_set_tone,
 265 };
 266
 267 MODULE_DESCRIPTION("DVB DUMMY Frontend");
 268 MODULE_AUTHOR("Emard");
 269 MODULE_LICENSE("GPL");
 270
 271 EXPORT_SYMBOL(dvb_dummy_fe_ofdm_attach);
 272 EXPORT_SYMBOL(dvb_dummy_fe_qam_attach);
 273 EXPORT_SYMBOL(dvb_dummy_fe_qpsk_attach);