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/moduleparam.h>
  24 #include <linux/init.h>
  25
  26 #include "dvb_frontend.h"
  27 #include "dvb_dummy_fe.h"
  28
  29
  30 struct dvb_dummy_fe_state {
  31         struct dvb_frontend_ops ops;
  32         struct dvb_frontend frontend;
  33 };
  34
  35
  36 static int dvb_dummy_fe_read_status(struct dvb_frontend* fe, fe_status_t* status)
  37 {
  38         *status = FE_HAS_SIGNAL
  39                 | FE_HAS_CARRIER
  40                 | FE_HAS_VITERBI
  41                 | FE_HAS_SYNC
  42                 | FE_HAS_LOCK;
  43
  44         return 0;
  45 }
  46
  47 static int dvb_dummy_fe_read_ber(struct dvb_frontend* fe, u32* ber)
  48 {
  49         *ber = 0;
  50         return 0;
  51 }
  52
  53 static int dvb_dummy_fe_read_signal_strength(struct dvb_frontend* fe, u16* strength)
  54 {
  55         *strength = 0;
  56         return 0;
  57 }
  58
  59 static int dvb_dummy_fe_read_snr(struct dvb_frontend* fe, u16* snr)
  60 {
  61         *snr = 0;
  62         return 0;
  63 }
  64
  65 static int dvb_dummy_fe_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks)
  66 {
  67         *ucblocks = 0;
  68         return 0;
  69 }
  70
  71 static int dvb_dummy_fe_get_frontend(struct dvb_frontend* fe, struct dvb_frontend_parameters *p)
  72 {
  73         return 0;
  74 }
  75
  76 static int dvb_dummy_fe_set_frontend(struct dvb_frontend* fe, struct dvb_frontend_parameters *p)
  77 {
  78         return 0;
  79 }
  80
  81 static int dvb_dummy_fe_sleep(struct dvb_frontend* fe)
  82 {
  83         return 0;
  84 }
  85
  86 static int dvb_dummy_fe_init(struct dvb_frontend* fe)
  87 {
  88         return 0;
  89 }
  90
  91 static int dvb_dummy_fe_set_tone(struct dvb_frontend* fe, fe_sec_tone_mode_t tone)
  92 {
  93         return 0;
  94 }
  95
  96 static int dvb_dummy_fe_set_voltage(struct dvb_frontend* fe, fe_sec_voltage_t voltage)
  97 {
  98         return 0;
  99 }
 100
 101 static void dvb_dummy_fe_release(struct dvb_frontend* fe)
 102 {
 103         struct dvb_dummy_fe_state* state = (struct dvb_dummy_fe_state*) fe->demodulator_priv;
 104         kfree(state);
 105 }
 106
 107 static struct dvb_frontend_ops dvb_dummy_fe_ofdm_ops;
 108
 109 struct dvb_frontend* dvb_dummy_fe_ofdm_attach(void)
 110 {
 111         struct dvb_dummy_fe_state* state = NULL;
 112
 113         /* allocate memory for the internal state */
 114         state = (struct dvb_dummy_fe_state*) kmalloc(sizeof(struct dvb_dummy_fe_state), GFP_KERNEL);
 115         if (state == NULL) goto error;
 116
 117         /* setup the state */
 118         memcpy(&state->ops, &dvb_dummy_fe_ofdm_ops, sizeof(struct dvb_frontend_ops));
 119
 120         /* create dvb_frontend */
 121         state->frontend.ops = &state->ops;
 122         state->frontend.demodulator_priv = state;
 123         return &state->frontend;
 124
 125 error:
 126         kfree(state);
 127         return NULL;
 128 }
 129
 130 static struct dvb_frontend_ops dvb_dummy_fe_qpsk_ops;
 131
 132 struct dvb_frontend* dvb_dummy_fe_qpsk_attach()
 133 {
 134         struct dvb_dummy_fe_state* state = NULL;
 135
 136         /* allocate memory for the internal state */
 137         state = (struct dvb_dummy_fe_state*) kmalloc(sizeof(struct dvb_dummy_fe_state), GFP_KERNEL);
 138         if (state == NULL) goto error;
 139
 140         /* setup the state */
 141         memcpy(&state->ops, &dvb_dummy_fe_qpsk_ops, sizeof(struct dvb_frontend_ops));
 142
 143         /* create dvb_frontend */
 144         state->frontend.ops = &state->ops;
 145         state->frontend.demodulator_priv = state;
 146         return &state->frontend;
 147
 148 error:
 149         if (state) kfree(state);
 150         return NULL;
 151 }
 152
 153 static struct dvb_frontend_ops dvb_dummy_fe_qam_ops;
 154
 155 struct dvb_frontend* dvb_dummy_fe_qam_attach()
 156 {
 157         struct dvb_dummy_fe_state* state = NULL;
 158
 159         /* allocate memory for the internal state */
 160         state = (struct dvb_dummy_fe_state*) kmalloc(sizeof(struct dvb_dummy_fe_state), GFP_KERNEL);
 161         if (state == NULL) goto error;
 162
 163         /* setup the state */
 164         memcpy(&state->ops, &dvb_dummy_fe_qam_ops, sizeof(struct dvb_frontend_ops));
 165
 166         /* create dvb_frontend */
 167         state->frontend.ops = &state->ops;
 168         state->frontend.demodulator_priv = state;
 169         return &state->frontend;
 170
 171 error:
 172         if (state) kfree(state);
 173         return NULL;
 174 }
 175
 176 static struct dvb_frontend_ops dvb_dummy_fe_ofdm_ops = {
 177
 178         .info = {
 179                 .name                   = "Dummy DVB-T",
 180                 .type                   = FE_OFDM,
 181                 .frequency_min          = 0,
 182                 .frequency_max          = 863250000,
 183                 .frequency_stepsize     = 62500,
 184                 .caps = FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
 185                                 FE_CAN_FEC_4_5 | FE_CAN_FEC_5_6 | FE_CAN_FEC_6_7 |
 186                                 FE_CAN_FEC_7_8 | FE_CAN_FEC_8_9 | FE_CAN_FEC_AUTO |
 187                                 FE_CAN_QAM_16 | FE_CAN_QAM_64 | FE_CAN_QAM_AUTO |
 188                                 FE_CAN_TRANSMISSION_MODE_AUTO |
 189                                 FE_CAN_GUARD_INTERVAL_AUTO |
 190                                 FE_CAN_HIERARCHY_AUTO,
 191         },
 192
 193         .release = dvb_dummy_fe_release,
 194
 195         .init = dvb_dummy_fe_init,
 196         .sleep = dvb_dummy_fe_sleep,
 197
 198         .set_frontend = dvb_dummy_fe_set_frontend,
 199         .get_frontend = dvb_dummy_fe_get_frontend,
 200
 201         .read_status = dvb_dummy_fe_read_status,
 202         .read_ber = dvb_dummy_fe_read_ber,
 203         .read_signal_strength = dvb_dummy_fe_read_signal_strength,
 204         .read_snr = dvb_dummy_fe_read_snr,
 205         .read_ucblocks = dvb_dummy_fe_read_ucblocks,
 206 };
 207
 208 static struct dvb_frontend_ops dvb_dummy_fe_qam_ops = {
 209
 210         .info = {
 211                 .name                   = "Dummy DVB-C",
 212                 .type                   = FE_QAM,
 213                 .frequency_stepsize     = 62500,
 214                 .frequency_min          = 51000000,
 215                 .frequency_max          = 858000000,
 216                 .symbol_rate_min        = (57840000/2)/64,     /* SACLK/64 == (XIN/2)/64 */
 217                 .symbol_rate_max        = (57840000/2)/4,      /* SACLK/4 */
 218                 .caps = FE_CAN_QAM_16 | FE_CAN_QAM_32 | FE_CAN_QAM_64 |
 219                         FE_CAN_QAM_128 | FE_CAN_QAM_256 |
 220                         FE_CAN_FEC_AUTO | FE_CAN_INVERSION_AUTO
 221         },
 222
 223         .release = dvb_dummy_fe_release,
 224
 225         .init = dvb_dummy_fe_init,
 226         .sleep = dvb_dummy_fe_sleep,
 227
 228         .set_frontend = dvb_dummy_fe_set_frontend,
 229         .get_frontend = dvb_dummy_fe_get_frontend,
 230
 231         .read_status = dvb_dummy_fe_read_status,
 232         .read_ber = dvb_dummy_fe_read_ber,
 233         .read_signal_strength = dvb_dummy_fe_read_signal_strength,
 234         .read_snr = dvb_dummy_fe_read_snr,
 235         .read_ucblocks = dvb_dummy_fe_read_ucblocks,
 236 };
 237
 238 static struct dvb_frontend_ops dvb_dummy_fe_qpsk_ops = {
 239
 240         .info = {
 241                 .name                   = "Dummy DVB-S",
 242                 .type                   = FE_QPSK,
 243                 .frequency_min          = 950000,
 244                 .frequency_max          = 2150000,
 245                 .frequency_stepsize     = 250,           /* kHz for QPSK frontends */
 246                 .frequency_tolerance    = 29500,
 247                 .symbol_rate_min        = 1000000,
 248                 .symbol_rate_max        = 45000000,
 249                 .caps = FE_CAN_INVERSION_AUTO |
 250                         FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
 251                         FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
 252                         FE_CAN_QPSK
 253         },
 254
 255         .release = dvb_dummy_fe_release,
 256
 257         .init = dvb_dummy_fe_init,
 258         .sleep = dvb_dummy_fe_sleep,
 259
 260         .set_frontend = dvb_dummy_fe_set_frontend,
 261         .get_frontend = dvb_dummy_fe_get_frontend,
 262
 263         .read_status = dvb_dummy_fe_read_status,
 264         .read_ber = dvb_dummy_fe_read_ber,
 265         .read_signal_strength = dvb_dummy_fe_read_signal_strength,
 266         .read_snr = dvb_dummy_fe_read_snr,
 267         .read_ucblocks = dvb_dummy_fe_read_ucblocks,
 268
 269         .set_voltage = dvb_dummy_fe_set_voltage,
 270         .set_tone = dvb_dummy_fe_set_tone,
 271 };
 272
 273 MODULE_DESCRIPTION("DVB DUMMY Frontend");
 274 MODULE_AUTHOR("Emard");
 275 MODULE_LICENSE("GPL");
 276
 277 EXPORT_SYMBOL(dvb_dummy_fe_ofdm_attach);
 278 EXPORT_SYMBOL(dvb_dummy_fe_qam_attach);
 279 EXPORT_SYMBOL(dvb_dummy_fe_qpsk_attach);