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, 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 /*
  72  * Only needed if it actually reads something from the hardware
  73  */
  74 static int dvb_dummy_fe_get_frontend(struct dvb_frontend *fe)
  75 {
  76         return 0;
  77 }
  78
  79 static int dvb_dummy_fe_set_frontend(struct dvb_frontend *fe)
  80 {
  81         if (fe->ops.tuner_ops.set_params) {
  82                 fe->ops.tuner_ops.set_params(fe);
  83                 if (fe->ops.i2c_gate_ctrl)
  84                         fe->ops.i2c_gate_ctrl(fe, 0);
  85         }
  86
  87         return 0;
  88 }
  89
  90 static int dvb_dummy_fe_sleep(struct dvb_frontend* fe)
  91 {
  92         return 0;
  93 }
  94
  95 static int dvb_dummy_fe_init(struct dvb_frontend* fe)
  96 {
  97         return 0;
  98 }
  99
 100 static int dvb_dummy_fe_set_tone(struct dvb_frontend* fe, fe_sec_tone_mode_t tone)
 101 {
 102         return 0;
 103 }
 104
 105 static int dvb_dummy_fe_set_voltage(struct dvb_frontend* fe, fe_sec_voltage_t voltage)
 106 {
 107         return 0;
 108 }
 109
 110 static void dvb_dummy_fe_release(struct dvb_frontend* fe)
 111 {
 112         struct dvb_dummy_fe_state* state = fe->demodulator_priv;
 113         kfree(state);
 114 }
 115
 116 static struct dvb_frontend_ops dvb_dummy_fe_ofdm_ops;
 117
 118 struct dvb_frontend* dvb_dummy_fe_ofdm_attach(void)
 119 {
 120         struct dvb_dummy_fe_state* state = NULL;
 121
 122         /* allocate memory for the internal state */
 123         state = kzalloc(sizeof(struct dvb_dummy_fe_state), GFP_KERNEL);
 124         if (state == NULL) goto error;
 125
 126         /* create dvb_frontend */
 127         memcpy(&state->frontend.ops, &dvb_dummy_fe_ofdm_ops, sizeof(struct dvb_frontend_ops));
 128         state->frontend.demodulator_priv = state;
 129         return &state->frontend;
 130
 131 error:
 132         kfree(state);
 133         return NULL;
 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 == NULL) goto error;
 145
 146         /* create dvb_frontend */
 147         memcpy(&state->frontend.ops, &dvb_dummy_fe_qpsk_ops, sizeof(struct dvb_frontend_ops));
 148         state->frontend.demodulator_priv = state;
 149         return &state->frontend;
 150
 151 error:
 152         kfree(state);
 153         return NULL;
 154 }
 155
 156 static 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 == NULL) goto error;
 165
 166         /* create dvb_frontend */
 167         memcpy(&state->frontend.ops, &dvb_dummy_fe_qam_ops, sizeof(struct dvb_frontend_ops));
 168         state->frontend.demodulator_priv = state;
 169         return &state->frontend;
 170
 171 error:
 172         kfree(state);
 173         return NULL;
 174 }
 175
 176 static struct dvb_frontend_ops dvb_dummy_fe_ofdm_ops = {
 177         .delsys = { SYS_DVBT },
 178         .info = {
 179                 .name                   = "Dummy DVB-T",
 180                 .frequency_min          = 0,
 181                 .frequency_max          = 863250000,
 182                 .frequency_stepsize     = 62500,
 183                 .caps = FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
 184                                 FE_CAN_FEC_4_5 | FE_CAN_FEC_5_6 | FE_CAN_FEC_6_7 |
 185                                 FE_CAN_FEC_7_8 | FE_CAN_FEC_8_9 | FE_CAN_FEC_AUTO |
 186                                 FE_CAN_QAM_16 | FE_CAN_QAM_64 | FE_CAN_QAM_AUTO |
 187                                 FE_CAN_TRANSMISSION_MODE_AUTO |
 188                                 FE_CAN_GUARD_INTERVAL_AUTO |
 189                                 FE_CAN_HIERARCHY_AUTO,
 190         },
 191
 192         .release = dvb_dummy_fe_release,
 193
 194         .init = dvb_dummy_fe_init,
 195         .sleep = dvb_dummy_fe_sleep,
 196
 197         .set_frontend = dvb_dummy_fe_set_frontend,
 198         .get_frontend = dvb_dummy_fe_get_frontend,
 199
 200         .read_status = dvb_dummy_fe_read_status,
 201         .read_ber = dvb_dummy_fe_read_ber,
 202         .read_signal_strength = dvb_dummy_fe_read_signal_strength,
 203         .read_snr = dvb_dummy_fe_read_snr,
 204         .read_ucblocks = dvb_dummy_fe_read_ucblocks,
 205 };
 206
 207 static struct dvb_frontend_ops dvb_dummy_fe_qam_ops = {
 208         .delsys = { SYS_DVBC_ANNEX_A },
 209         .info = {
 210                 .name                   = "Dummy DVB-C",
 211                 .frequency_stepsize     = 62500,
 212                 .frequency_min          = 51000000,
 213                 .frequency_max          = 858000000,
 214                 .symbol_rate_min        = (57840000/2)/64,     /* SACLK/64 == (XIN/2)/64 */
 215                 .symbol_rate_max        = (57840000/2)/4,      /* SACLK/4 */
 216                 .caps = FE_CAN_QAM_16 | FE_CAN_QAM_32 | FE_CAN_QAM_64 |
 217                         FE_CAN_QAM_128 | FE_CAN_QAM_256 |
 218                         FE_CAN_FEC_AUTO | FE_CAN_INVERSION_AUTO
 219         },
 220
 221         .release = dvb_dummy_fe_release,
 222
 223         .init = dvb_dummy_fe_init,
 224         .sleep = dvb_dummy_fe_sleep,
 225
 226         .set_frontend = dvb_dummy_fe_set_frontend,
 227         .get_frontend = dvb_dummy_fe_get_frontend,
 228
 229         .read_status = dvb_dummy_fe_read_status,
 230         .read_ber = dvb_dummy_fe_read_ber,
 231         .read_signal_strength = dvb_dummy_fe_read_signal_strength,
 232         .read_snr = dvb_dummy_fe_read_snr,
 233         .read_ucblocks = dvb_dummy_fe_read_ucblocks,
 234 };
 235
 236 static struct dvb_frontend_ops dvb_dummy_fe_qpsk_ops = {
 237         .delsys = { SYS_DVBS },
 238         .info = {
 239                 .name                   = "Dummy DVB-S",
 240                 .frequency_min          = 950000,
 241                 .frequency_max          = 2150000,
 242                 .frequency_stepsize     = 250,           /* kHz for QPSK frontends */
 243                 .frequency_tolerance    = 29500,
 244                 .symbol_rate_min        = 1000000,
 245                 .symbol_rate_max        = 45000000,
 246                 .caps = FE_CAN_INVERSION_AUTO |
 247                         FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
 248                         FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
 249                         FE_CAN_QPSK
 250         },
 251
 252         .release = dvb_dummy_fe_release,
 253
 254         .init = dvb_dummy_fe_init,
 255         .sleep = dvb_dummy_fe_sleep,
 256
 257         .set_frontend = dvb_dummy_fe_set_frontend,
 258         .get_frontend = dvb_dummy_fe_get_frontend,
 259
 260         .read_status = dvb_dummy_fe_read_status,
 261         .read_ber = dvb_dummy_fe_read_ber,
 262         .read_signal_strength = dvb_dummy_fe_read_signal_strength,
 263         .read_snr = dvb_dummy_fe_read_snr,
 264         .read_ucblocks = dvb_dummy_fe_read_ucblocks,
 265
 266         .set_voltage = dvb_dummy_fe_set_voltage,
 267         .set_tone = dvb_dummy_fe_set_tone,
 268 };
 269
 270 MODULE_DESCRIPTION("DVB DUMMY Frontend");
 271 MODULE_AUTHOR("Emard");
 272 MODULE_LICENSE("GPL");
 273
 274 EXPORT_SYMBOL(dvb_dummy_fe_ofdm_attach);
 275 EXPORT_SYMBOL(dvb_dummy_fe_qam_attach);
 276 EXPORT_SYMBOL(dvb_dummy_fe_qpsk_attach);