drivers/media/dvb/dvb-usb/gp8psk-fe.c

   1 /* DVB USB compliant Linux driver for the
   2  *  - GENPIX 8pks/qpsk/DCII USB2.0 DVB-S module
   3  *
   4  * Copyright (C) 2006,2007 Alan Nisota (alannisota@gmail.com)
   5  * Copyright (C) 2006,2007 Genpix Electronics (genpix@genpix-electronics.com)
   6  *
   7  * Thanks to GENPIX for the sample code used to implement this module.
   8  *
   9  * This module is based off the vp7045 and vp702x modules
  10  *
  11  *      This program is free software; you can redistribute it and/or modify it
  12  *      under the terms of the GNU General Public License as published by the Free
  13  *      Software Foundation, version 2.
  14  *
  15  * see Documentation/dvb/README.dvb-usb for more information
  16  */
  17 #include "gp8psk.h"
  18
  19 struct gp8psk_fe_state {
  20         struct dvb_frontend fe;
  21         struct dvb_usb_device *d;
  22         u8 lock;
  23         u16 snr;
  24         unsigned long next_status_check;
  25         unsigned long status_check_interval;
  26 };
  27
  28 static int gp8psk_tuned_to_DCII(struct dvb_frontend *fe)
  29 {
  30         struct gp8psk_fe_state *st = fe->demodulator_priv;
  31         u8 status;
  32         gp8psk_usb_in_op(st->d, GET_8PSK_CONFIG, 0, 0, &status, 1);
  33         return status & bmDCtuned;
  34 }
  35
  36 static int gp8psk_set_tuner_mode(struct dvb_frontend *fe, int mode)
  37 {
  38         struct gp8psk_fe_state *state = fe->demodulator_priv;
  39         return gp8psk_usb_out_op(state->d, SET_8PSK_CONFIG, mode, 0, NULL, 0);
  40 }
  41
  42 static int gp8psk_fe_update_status(struct gp8psk_fe_state *st)
  43 {
  44         u8 buf[6];
  45         if (time_after(jiffies,st->next_status_check)) {
  46                 gp8psk_usb_in_op(st->d, GET_SIGNAL_LOCK, 0,0,&st->lock,1);
  47                 gp8psk_usb_in_op(st->d, GET_SIGNAL_STRENGTH, 0,0,buf,6);
  48                 st->snr = (buf[1]) << 8 | buf[0];
  49                 st->next_status_check = jiffies + (st->status_check_interval*HZ)/1000;
  50         }
  51         return 0;
  52 }
  53
  54 static int gp8psk_fe_read_status(struct dvb_frontend* fe, fe_status_t *status)
  55 {
  56         struct gp8psk_fe_state *st = fe->demodulator_priv;
  57         gp8psk_fe_update_status(st);
  58
  59         if (st->lock)
  60                 *status = FE_HAS_LOCK | FE_HAS_SYNC | FE_HAS_VITERBI | FE_HAS_SIGNAL | FE_HAS_CARRIER;
  61         else
  62                 *status = 0;
  63
  64         if (*status & FE_HAS_LOCK)
  65                 st->status_check_interval = 1000;
  66         else
  67                 st->status_check_interval = 100;
  68         return 0;
  69 }
  70
  71 /* not supported by this Frontend */
  72 static int gp8psk_fe_read_ber(struct dvb_frontend* fe, u32 *ber)
  73 {
  74         (void) fe;
  75         *ber = 0;
  76         return 0;
  77 }
  78
  79 /* not supported by this Frontend */
  80 static int gp8psk_fe_read_unc_blocks(struct dvb_frontend* fe, u32 *unc)
  81 {
  82         (void) fe;
  83         *unc = 0;
  84         return 0;
  85 }
  86
  87 static int gp8psk_fe_read_snr(struct dvb_frontend* fe, u16 *snr)
  88 {
  89         struct gp8psk_fe_state *st = fe->demodulator_priv;
  90         gp8psk_fe_update_status(st);
  91         /* snr is reported in dBu*256 */
  92         *snr = st->snr;
  93         return 0;
  94 }
  95
  96 static int gp8psk_fe_read_signal_strength(struct dvb_frontend* fe, u16 *strength)
  97 {
  98         struct gp8psk_fe_state *st = fe->demodulator_priv;
  99         gp8psk_fe_update_status(st);
 100         /* snr is reported in dBu*256 */
 101         /* snr / 38.4 ~= 100% strength */
 102         /* snr * 17 returns 100% strength as 65535 */
 103         if (st->snr > 0xf00)
 104                 *strength = 0xffff;
 105         else
 106                 *strength = (st->snr << 4) + st->snr; /* snr*17 */
 107         return 0;
 108 }
 109
 110 static int gp8psk_fe_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings *tune)
 111 {
 112         tune->min_delay_ms = 800;
 113         return 0;
 114 }
 115
 116 static int gp8psk_fe_set_property(struct dvb_frontend *fe,
 117         struct dtv_property *tvp)
 118 {
 119         deb_fe("%s(..)\n", __func__);
 120         return 0;
 121 }
 122
 123 static int gp8psk_fe_get_property(struct dvb_frontend *fe,
 124         struct dtv_property *tvp)
 125 {
 126         deb_fe("%s(..)\n", __func__);
 127         return 0;
 128 }
 129
 130
 131 static int gp8psk_fe_set_frontend(struct dvb_frontend* fe,
 132                                   struct dvb_frontend_parameters *fep)
 133 {
 134         struct gp8psk_fe_state *state = fe->demodulator_priv;
 135         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 136         u8 cmd[10];
 137         u32 freq = fep->frequency * 1000;
 138         int gp_product_id = le16_to_cpu(state->d->udev->descriptor.idProduct);
 139
 140         deb_fe("%s()\n", __func__);
 141
 142         cmd[4] = freq         & 0xff;
 143         cmd[5] = (freq >> 8)  & 0xff;
 144         cmd[6] = (freq >> 16) & 0xff;
 145         cmd[7] = (freq >> 24) & 0xff;
 146
 147         /* backwards compatibility: DVB-S + 8-PSK were used for Turbo-FEC */
 148         if (c->delivery_system == SYS_DVBS && c->modulation == PSK_8)
 149                 c->delivery_system = SYS_TURBO;
 150
 151         switch (c->delivery_system) {
 152         case SYS_DVBS:
 153                 if (c->modulation != QPSK) {
 154                         deb_fe("%s: unsupported modulation selected (%d)\n",
 155                                 __func__, c->modulation);
 156                         return -EOPNOTSUPP;
 157                 }
 158                 c->fec_inner = FEC_AUTO;
 159                 break;
 160         case SYS_DVBS2: /* kept for backwards compatibility */
 161                 deb_fe("%s: DVB-S2 delivery system selected\n", __func__);
 162                 break;
 163         case SYS_TURBO:
 164                 deb_fe("%s: Turbo-FEC delivery system selected\n", __func__);
 165                 break;
 166
 167         default:
 168                 deb_fe("%s: unsupported delivery system selected (%d)\n",
 169                         __func__, c->delivery_system);
 170                 return -EOPNOTSUPP;
 171         }
 172
 173         cmd[0] =  c->symbol_rate        & 0xff;
 174         cmd[1] = (c->symbol_rate >>  8) & 0xff;
 175         cmd[2] = (c->symbol_rate >> 16) & 0xff;
 176         cmd[3] = (c->symbol_rate >> 24) & 0xff;
 177         switch (c->modulation) {
 178         case QPSK:
 179                 if (gp_product_id == USB_PID_GENPIX_8PSK_REV_1_WARM)
 180                         if (gp8psk_tuned_to_DCII(fe))
 181                                 gp8psk_bcm4500_reload(state->d);
 182                 switch (c->fec_inner) {
 183                 case FEC_1_2:
 184                         cmd[9] = 0; break;
 185                 case FEC_2_3:
 186                         cmd[9] = 1; break;
 187                 case FEC_3_4:
 188                         cmd[9] = 2; break;
 189                 case FEC_5_6:
 190                         cmd[9] = 3; break;
 191                 case FEC_7_8:
 192                         cmd[9] = 4; break;
 193                 case FEC_AUTO:
 194                         cmd[9] = 5; break;
 195                 default:
 196                         cmd[9] = 5; break;
 197                 }
 198                 if (c->delivery_system == SYS_TURBO)
 199                         cmd[8] = ADV_MOD_TURBO_QPSK;
 200                 else
 201                         cmd[8] = ADV_MOD_DVB_QPSK;
 202                 break;
 203         case PSK_8: /* PSK_8 is for compatibility with DN */
 204                 cmd[8] = ADV_MOD_TURBO_8PSK;
 205                 switch (c->fec_inner) {
 206                 case FEC_2_3:
 207                         cmd[9] = 0; break;
 208                 case FEC_3_4:
 209                         cmd[9] = 1; break;
 210                 case FEC_3_5:
 211                         cmd[9] = 2; break;
 212                 case FEC_5_6:
 213                         cmd[9] = 3; break;
 214                 case FEC_8_9:
 215                         cmd[9] = 4; break;
 216                 default:
 217                         cmd[9] = 0; break;
 218                 }
 219                 break;
 220         case QAM_16: /* QAM_16 is for compatibility with DN */
 221                 cmd[8] = ADV_MOD_TURBO_16QAM;
 222                 cmd[9] = 0;
 223                 break;
 224         default: /* Unknown modulation */
 225                 deb_fe("%s: unsupported modulation selected (%d)\n",
 226                         __func__, c->modulation);
 227                 return -EOPNOTSUPP;
 228         }
 229
 230         if (gp_product_id == USB_PID_GENPIX_8PSK_REV_1_WARM)
 231                 gp8psk_set_tuner_mode(fe, 0);
 232         gp8psk_usb_out_op(state->d, TUNE_8PSK, 0, 0, cmd, 10);
 233
 234         state->lock = 0;
 235         state->next_status_check = jiffies;
 236         state->status_check_interval = 200;
 237
 238         return 0;
 239 }
 240
 241 static int gp8psk_fe_send_diseqc_msg (struct dvb_frontend* fe,
 242                                     struct dvb_diseqc_master_cmd *m)
 243 {
 244         struct gp8psk_fe_state *st = fe->demodulator_priv;
 245
 246         deb_fe("%s\n",__func__);
 247
 248         if (gp8psk_usb_out_op(st->d,SEND_DISEQC_COMMAND, m->msg[0], 0,
 249                         m->msg, m->msg_len)) {
 250                 return -EINVAL;
 251         }
 252         return 0;
 253 }
 254
 255 static int gp8psk_fe_send_diseqc_burst (struct dvb_frontend* fe,
 256                                     fe_sec_mini_cmd_t burst)
 257 {
 258         struct gp8psk_fe_state *st = fe->demodulator_priv;
 259         u8 cmd;
 260
 261         deb_fe("%s\n",__func__);
 262
 263         /* These commands are certainly wrong */
 264         cmd = (burst == SEC_MINI_A) ? 0x00 : 0x01;
 265
 266         if (gp8psk_usb_out_op(st->d,SEND_DISEQC_COMMAND, cmd, 0,
 267                         &cmd, 0)) {
 268                 return -EINVAL;
 269         }
 270         return 0;
 271 }
 272
 273 static int gp8psk_fe_set_tone (struct dvb_frontend* fe, fe_sec_tone_mode_t tone)
 274 {
 275         struct gp8psk_fe_state* state = fe->demodulator_priv;
 276
 277         if (gp8psk_usb_out_op(state->d,SET_22KHZ_TONE,
 278                  (tone == SEC_TONE_ON), 0, NULL, 0)) {
 279                 return -EINVAL;
 280         }
 281         return 0;
 282 }
 283
 284 static int gp8psk_fe_set_voltage (struct dvb_frontend* fe, fe_sec_voltage_t voltage)
 285 {
 286         struct gp8psk_fe_state* state = fe->demodulator_priv;
 287
 288         if (gp8psk_usb_out_op(state->d,SET_LNB_VOLTAGE,
 289                          voltage == SEC_VOLTAGE_18, 0, NULL, 0)) {
 290                 return -EINVAL;
 291         }
 292         return 0;
 293 }
 294
 295 static int gp8psk_fe_enable_high_lnb_voltage(struct dvb_frontend* fe, long onoff)
 296 {
 297         struct gp8psk_fe_state* state = fe->demodulator_priv;
 298         return gp8psk_usb_out_op(state->d, USE_EXTRA_VOLT, onoff, 0,NULL,0);
 299 }
 300
 301 static int gp8psk_fe_send_legacy_dish_cmd (struct dvb_frontend* fe, unsigned long sw_cmd)
 302 {
 303         struct gp8psk_fe_state* state = fe->demodulator_priv;
 304         u8 cmd = sw_cmd & 0x7f;
 305
 306         if (gp8psk_usb_out_op(state->d,SET_DN_SWITCH, cmd, 0,
 307                         NULL, 0)) {
 308                 return -EINVAL;
 309         }
 310         if (gp8psk_usb_out_op(state->d,SET_LNB_VOLTAGE, !!(sw_cmd & 0x80),
 311                         0, NULL, 0)) {
 312                 return -EINVAL;
 313         }
 314
 315         return 0;
 316 }
 317
 318 static void gp8psk_fe_release(struct dvb_frontend* fe)
 319 {
 320         struct gp8psk_fe_state *state = fe->demodulator_priv;
 321         kfree(state);
 322 }
 323
 324 static struct dvb_frontend_ops gp8psk_fe_ops;
 325
 326 struct dvb_frontend * gp8psk_fe_attach(struct dvb_usb_device *d)
 327 {
 328         struct gp8psk_fe_state *s = kzalloc(sizeof(struct gp8psk_fe_state), GFP_KERNEL);
 329         if (s == NULL)
 330                 goto error;
 331
 332         s->d = d;
 333         memcpy(&s->fe.ops, &gp8psk_fe_ops, sizeof(struct dvb_frontend_ops));
 334         s->fe.demodulator_priv = s;
 335
 336         goto success;
 337 error:
 338         return NULL;
 339 success:
 340         return &s->fe;
 341 }
 342
 343
 344 static struct dvb_frontend_ops gp8psk_fe_ops = {
 345         .info = {
 346                 .name                   = "Genpix DVB-S",
 347                 .type                   = FE_QPSK,
 348                 .frequency_min          = 800000,
 349                 .frequency_max          = 2250000,
 350                 .frequency_stepsize     = 100,
 351                 .symbol_rate_min        = 1000000,
 352                 .symbol_rate_max        = 45000000,
 353                 .symbol_rate_tolerance  = 500,  /* ppm */
 354                 .caps = FE_CAN_INVERSION_AUTO |
 355                         FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
 356                         FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
 357                         /*
 358                          * FE_CAN_QAM_16 is for compatibility
 359                          * (Myth incorrectly detects Turbo-QPSK as plain QAM-16)
 360                          */
 361                         FE_CAN_QPSK | FE_CAN_QAM_16 | FE_CAN_TURBO_FEC
 362         },
 363
 364         .release = gp8psk_fe_release,
 365
 366         .init = NULL,
 367         .sleep = NULL,
 368
 369         .set_property = gp8psk_fe_set_property,
 370         .get_property = gp8psk_fe_get_property,
 371         .set_frontend = gp8psk_fe_set_frontend,
 372
 373         .get_tune_settings = gp8psk_fe_get_tune_settings,
 374
 375         .read_status = gp8psk_fe_read_status,
 376         .read_ber = gp8psk_fe_read_ber,
 377         .read_signal_strength = gp8psk_fe_read_signal_strength,
 378         .read_snr = gp8psk_fe_read_snr,
 379         .read_ucblocks = gp8psk_fe_read_unc_blocks,
 380
 381         .diseqc_send_master_cmd = gp8psk_fe_send_diseqc_msg,
 382         .diseqc_send_burst = gp8psk_fe_send_diseqc_burst,
 383         .set_tone = gp8psk_fe_set_tone,
 384         .set_voltage = gp8psk_fe_set_voltage,
 385         .dishnetwork_send_legacy_command = gp8psk_fe_send_legacy_dish_cmd,
 386         .enable_high_lnb_voltage = gp8psk_fe_enable_high_lnb_voltage
 387 };