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 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         if (fe->ops->tuner_ops->set_params) {
  79                 fe->ops->tuner_ops->set_params(fe, p);
  80                 if (fe->ops->i2c_gate_ctrl) fe->ops->i2c_gate_ctrl(fe, 0);
  81         }
  82
  83         return 0;
  84 }
  85
  86 static int dvb_dummy_fe_sleep(struct dvb_frontend* fe)
  87 {
  88         return 0;
  89 }
  90
  91 static int dvb_dummy_fe_init(struct dvb_frontend* fe)
  92 {
  93         return 0;
  94 }
  95
  96 static int dvb_dummy_fe_set_tone(struct dvb_frontend* fe, fe_sec_tone_mode_t tone)
  97 {
  98         return 0;
  99 }
 100
 101 static int dvb_dummy_fe_set_voltage(struct dvb_frontend* fe, fe_sec_voltage_t voltage)
 102 {
 103         return 0;
 104 }
 105
 106 static void dvb_dummy_fe_release(struct dvb_frontend* fe)
 107 {
 108         struct dvb_dummy_fe_state* state = fe->demodulator_priv;
 109         kfree(state);
 110 }
 111
 112 static struct dvb_frontend_ops dvb_dummy_fe_ofdm_ops;
 113
 114 struct dvb_frontend* dvb_dummy_fe_ofdm_attach(void)
 115 {
 116         struct dvb_dummy_fe_state* state = NULL;
 117
 118         /* allocate memory for the internal state */
 119         state = kmalloc(sizeof(struct dvb_dummy_fe_state), GFP_KERNEL);
 120         if (state == NULL) goto error;
 121
 122         /* create dvb_frontend */
 123         memcpy(&state->frontend.ops, &dvb_dummy_fe_ofdm_ops, sizeof(struct dvb_frontend_ops));
 124         state->frontend.demodulator_priv = state;
 125         return &state->frontend;
 126
 127 error:
 128         kfree(state);
 129         return NULL;
 130 }
 131
 132 static struct dvb_frontend_ops dvb_dummy_fe_qpsk_ops;
 133
 134 struct dvb_frontend* dvb_dummy_fe_qpsk_attach()
 135 {
 136         struct dvb_dummy_fe_state* state = NULL;
 137
 138         /* allocate memory for the internal state */
 139         state = kmalloc(sizeof(struct dvb_dummy_fe_state), GFP_KERNEL);
 140         if (state == NULL) goto error;
 141
 142         /* create dvb_frontend */
 143         memcpy(&state->frontend.ops, &dvb_dummy_fe_qpsk_ops, sizeof(struct dvb_frontend_ops));
 144         state->frontend.demodulator_priv = state;
 145         return &state->frontend;
 146
 147 error:
 148         kfree(state);
 149         return NULL;
 150 }
 151
 152 static struct dvb_frontend_ops dvb_dummy_fe_qam_ops;
 153
 154 struct dvb_frontend* dvb_dummy_fe_qam_attach()
 155 {
 156         struct dvb_dummy_fe_state* state = NULL;
 157
 158         /* allocate memory for the internal state */
 159         state = kmalloc(sizeof(struct dvb_dummy_fe_state), GFP_KERNEL);
 160         if (state == NULL) goto error;
 161
 162         /* create dvb_frontend */
 163         memcpy(&state->frontend.ops, &dvb_dummy_fe_qam_ops, sizeof(struct dvb_frontend_ops));
 164         state->frontend.demodulator_priv = state;
 165         return &state->frontend;
 166
 167 error:
 168         kfree(state);
 169         return NULL;
 170 }
 171
 172 static struct dvb_frontend_ops dvb_dummy_fe_ofdm_ops = {
 173
 174         .info = {
 175                 .name                   = "Dummy DVB-T",
 176                 .type                   = FE_OFDM,
 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 struct dvb_frontend_ops dvb_dummy_fe_qam_ops = {
 205
 206         .info = {
 207                 .name                   = "Dummy DVB-C",
 208                 .type                   = FE_QAM,
 209                 .frequency_stepsize     = 62500,
 210                 .frequency_min          = 51000000,
 211                 .frequency_max          = 858000000,
 212                 .symbol_rate_min        = (57840000/2)/64,     /* SACLK/64 == (XIN/2)/64 */
 213                 .symbol_rate_max        = (57840000/2)/4,      /* SACLK/4 */
 214                 .caps = FE_CAN_QAM_16 | FE_CAN_QAM_32 | FE_CAN_QAM_64 |
 215                         FE_CAN_QAM_128 | FE_CAN_QAM_256 |
 216                         FE_CAN_FEC_AUTO | FE_CAN_INVERSION_AUTO
 217         },
 218
 219         .release = dvb_dummy_fe_release,
 220
 221         .init = dvb_dummy_fe_init,
 222         .sleep = dvb_dummy_fe_sleep,
 223
 224         .set_frontend = dvb_dummy_fe_set_frontend,
 225         .get_frontend = dvb_dummy_fe_get_frontend,
 226
 227         .read_status = dvb_dummy_fe_read_status,
 228         .read_ber = dvb_dummy_fe_read_ber,
 229         .read_signal_strength = dvb_dummy_fe_read_signal_strength,
 230         .read_snr = dvb_dummy_fe_read_snr,
 231         .read_ucblocks = dvb_dummy_fe_read_ucblocks,
 232 };
 233
 234 static struct dvb_frontend_ops dvb_dummy_fe_qpsk_ops = {
 235
 236         .info = {
 237                 .name                   = "Dummy DVB-S",
 238                 .type                   = FE_QPSK,
 239                 .frequency_min          = 950000,
 240                 .frequency_max          = 2150000,
 241                 .frequency_stepsize     = 250,           /* kHz for QPSK frontends */
 242                 .frequency_tolerance    = 29500,
 243                 .symbol_rate_min        = 1000000,
 244                 .symbol_rate_max        = 45000000,
 245                 .caps = FE_CAN_INVERSION_AUTO |
 246                         FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
 247                         FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
 248                         FE_CAN_QPSK
 249         },
 250
 251         .release = dvb_dummy_fe_release,
 252
 253         .init = dvb_dummy_fe_init,
 254         .sleep = dvb_dummy_fe_sleep,
 255
 256         .set_frontend = dvb_dummy_fe_set_frontend,
 257         .get_frontend = dvb_dummy_fe_get_frontend,
 258
 259         .read_status = dvb_dummy_fe_read_status,
 260         .read_ber = dvb_dummy_fe_read_ber,
 261         .read_signal_strength = dvb_dummy_fe_read_signal_strength,
 262         .read_snr = dvb_dummy_fe_read_snr,
 263         .read_ucblocks = dvb_dummy_fe_read_ucblocks,
 264
 265         .set_voltage = dvb_dummy_fe_set_voltage,
 266         .set_tone = dvb_dummy_fe_set_tone,
 267 };
 268
 269 MODULE_DESCRIPTION("DVB DUMMY Frontend");
 270 MODULE_AUTHOR("Emard");
 271 MODULE_LICENSE("GPL");
 272
 273 EXPORT_SYMBOL(dvb_dummy_fe_ofdm_attach);
 274 EXPORT_SYMBOL(dvb_dummy_fe_qam_attach);
 275 EXPORT_SYMBOL(dvb_dummy_fe_qpsk_attach);