kernel/drivers/media/usb/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,
  55                                  enum fe_status *status)
  56 {
  57         struct gp8psk_fe_state *st = fe->demodulator_priv;
  58         gp8psk_fe_update_status(st);
  59
  60         if (st->lock)
  61                 *status = FE_HAS_LOCK | FE_HAS_SYNC | FE_HAS_VITERBI | FE_HAS_SIGNAL | FE_HAS_CARRIER;
  62         else
  63                 *status = 0;
  64
  65         if (*status & FE_HAS_LOCK)
  66                 st->status_check_interval = 1000;
  67         else
  68                 st->status_check_interval = 100;
  69         return 0;
  70 }
  71
  72 /* not supported by this Frontend */
  73 static int gp8psk_fe_read_ber(struct dvb_frontend* fe, u32 *ber)
  74 {
  75         (void) fe;
  76         *ber = 0;
  77         return 0;
  78 }
  79
  80 /* not supported by this Frontend */
  81 static int gp8psk_fe_read_unc_blocks(struct dvb_frontend* fe, u32 *unc)
  82 {
  83         (void) fe;
  84         *unc = 0;
  85         return 0;
  86 }
  87
  88 static int gp8psk_fe_read_snr(struct dvb_frontend* fe, u16 *snr)
  89 {
  90         struct gp8psk_fe_state *st = fe->demodulator_priv;
  91         gp8psk_fe_update_status(st);
  92         /* snr is reported in dBu*256 */
  93         *snr = st->snr;
  94         return 0;
  95 }
  96
  97 static int gp8psk_fe_read_signal_strength(struct dvb_frontend* fe, u16 *strength)
  98 {
  99         struct gp8psk_fe_state *st = fe->demodulator_priv;
 100         gp8psk_fe_update_status(st);
 101         /* snr is reported in dBu*256 */
 102         /* snr / 38.4 ~= 100% strength */
 103         /* snr * 17 returns 100% strength as 65535 */
 104         if (st->snr > 0xf00)
 105                 *strength = 0xffff;
 106         else
 107                 *strength = (st->snr << 4) + st->snr; /* snr*17 */
 108         return 0;
 109 }
 110
 111 static int gp8psk_fe_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings *tune)
 112 {
 113         tune->min_delay_ms = 800;
 114         return 0;
 115 }
 116
 117 static int gp8psk_fe_set_frontend(struct dvb_frontend *fe)
 118 {
 119         struct gp8psk_fe_state *state = fe->demodulator_priv;
 120         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 121         u8 cmd[10];
 122         u32 freq = c->frequency * 1000;
 123         int gp_product_id = le16_to_cpu(state->d->udev->descriptor.idProduct);
 124
 125         deb_fe("%s()\n", __func__);
 126
 127         cmd[4] = freq         & 0xff;
 128         cmd[5] = (freq >> 8)  & 0xff;
 129         cmd[6] = (freq >> 16) & 0xff;
 130         cmd[7] = (freq >> 24) & 0xff;
 131
 132         /* backwards compatibility: DVB-S + 8-PSK were used for Turbo-FEC */
 133         if (c->delivery_system == SYS_DVBS && c->modulation == PSK_8)
 134                 c->delivery_system = SYS_TURBO;
 135
 136         switch (c->delivery_system) {
 137         case SYS_DVBS:
 138                 if (c->modulation != QPSK) {
 139                         deb_fe("%s: unsupported modulation selected (%d)\n",
 140                                 __func__, c->modulation);
 141                         return -EOPNOTSUPP;
 142                 }
 143                 c->fec_inner = FEC_AUTO;
 144                 break;
 145         case SYS_DVBS2: /* kept for backwards compatibility */
 146                 deb_fe("%s: DVB-S2 delivery system selected\n", __func__);
 147                 break;
 148         case SYS_TURBO:
 149                 deb_fe("%s: Turbo-FEC delivery system selected\n", __func__);
 150                 break;
 151
 152         default:
 153                 deb_fe("%s: unsupported delivery system selected (%d)\n",
 154                         __func__, c->delivery_system);
 155                 return -EOPNOTSUPP;
 156         }
 157
 158         cmd[0] =  c->symbol_rate        & 0xff;
 159         cmd[1] = (c->symbol_rate >>  8) & 0xff;
 160         cmd[2] = (c->symbol_rate >> 16) & 0xff;
 161         cmd[3] = (c->symbol_rate >> 24) & 0xff;
 162         switch (c->modulation) {
 163         case QPSK:
 164                 if (gp_product_id == USB_PID_GENPIX_8PSK_REV_1_WARM)
 165                         if (gp8psk_tuned_to_DCII(fe))
 166                                 gp8psk_bcm4500_reload(state->d);
 167                 switch (c->fec_inner) {
 168                 case FEC_1_2:
 169                         cmd[9] = 0; break;
 170                 case FEC_2_3:
 171                         cmd[9] = 1; break;
 172                 case FEC_3_4:
 173                         cmd[9] = 2; break;
 174                 case FEC_5_6:
 175                         cmd[9] = 3; break;
 176                 case FEC_7_8:
 177                         cmd[9] = 4; break;
 178                 case FEC_AUTO:
 179                         cmd[9] = 5; break;
 180                 default:
 181                         cmd[9] = 5; break;
 182                 }
 183                 if (c->delivery_system == SYS_TURBO)
 184                         cmd[8] = ADV_MOD_TURBO_QPSK;
 185                 else
 186                         cmd[8] = ADV_MOD_DVB_QPSK;
 187                 break;
 188         case PSK_8: /* PSK_8 is for compatibility with DN */
 189                 cmd[8] = ADV_MOD_TURBO_8PSK;
 190                 switch (c->fec_inner) {
 191                 case FEC_2_3:
 192                         cmd[9] = 0; break;
 193                 case FEC_3_4:
 194                         cmd[9] = 1; break;
 195                 case FEC_3_5:
 196                         cmd[9] = 2; break;
 197                 case FEC_5_6:
 198                         cmd[9] = 3; break;
 199                 case FEC_8_9:
 200                         cmd[9] = 4; break;
 201                 default:
 202                         cmd[9] = 0; break;
 203                 }
 204                 break;
 205         case QAM_16: /* QAM_16 is for compatibility with DN */
 206                 cmd[8] = ADV_MOD_TURBO_16QAM;
 207                 cmd[9] = 0;
 208                 break;
 209         default: /* Unknown modulation */
 210                 deb_fe("%s: unsupported modulation selected (%d)\n",
 211                         __func__, c->modulation);
 212                 return -EOPNOTSUPP;
 213         }
 214
 215         if (gp_product_id == USB_PID_GENPIX_8PSK_REV_1_WARM)
 216                 gp8psk_set_tuner_mode(fe, 0);
 217         gp8psk_usb_out_op(state->d, TUNE_8PSK, 0, 0, cmd, 10);
 218
 219         state->lock = 0;
 220         state->next_status_check = jiffies;
 221         state->status_check_interval = 200;
 222
 223         return 0;
 224 }
 225
 226 static int gp8psk_fe_send_diseqc_msg (struct dvb_frontend* fe,
 227                                     struct dvb_diseqc_master_cmd *m)
 228 {
 229         struct gp8psk_fe_state *st = fe->demodulator_priv;
 230
 231         deb_fe("%s\n",__func__);
 232
 233         if (gp8psk_usb_out_op(st->d,SEND_DISEQC_COMMAND, m->msg[0], 0,
 234                         m->msg, m->msg_len)) {
 235                 return -EINVAL;
 236         }
 237         return 0;
 238 }
 239
 240 static int gp8psk_fe_send_diseqc_burst(struct dvb_frontend *fe,
 241                                        enum fe_sec_mini_cmd burst)
 242 {
 243         struct gp8psk_fe_state *st = fe->demodulator_priv;
 244         u8 cmd;
 245
 246         deb_fe("%s\n",__func__);
 247
 248         /* These commands are certainly wrong */
 249         cmd = (burst == SEC_MINI_A) ? 0x00 : 0x01;
 250
 251         if (gp8psk_usb_out_op(st->d,SEND_DISEQC_COMMAND, cmd, 0,
 252                         &cmd, 0)) {
 253                 return -EINVAL;
 254         }
 255         return 0;
 256 }
 257
 258 static int gp8psk_fe_set_tone(struct dvb_frontend *fe,
 259                               enum fe_sec_tone_mode tone)
 260 {
 261         struct gp8psk_fe_state* state = fe->demodulator_priv;
 262
 263         if (gp8psk_usb_out_op(state->d,SET_22KHZ_TONE,
 264                  (tone == SEC_TONE_ON), 0, NULL, 0)) {
 265                 return -EINVAL;
 266         }
 267         return 0;
 268 }
 269
 270 static int gp8psk_fe_set_voltage(struct dvb_frontend *fe,
 271                                  enum fe_sec_voltage voltage)
 272 {
 273         struct gp8psk_fe_state* state = fe->demodulator_priv;
 274
 275         if (gp8psk_usb_out_op(state->d,SET_LNB_VOLTAGE,
 276                          voltage == SEC_VOLTAGE_18, 0, NULL, 0)) {
 277                 return -EINVAL;
 278         }
 279         return 0;
 280 }
 281
 282 static int gp8psk_fe_enable_high_lnb_voltage(struct dvb_frontend* fe, long onoff)
 283 {
 284         struct gp8psk_fe_state* state = fe->demodulator_priv;
 285         return gp8psk_usb_out_op(state->d, USE_EXTRA_VOLT, onoff, 0,NULL,0);
 286 }
 287
 288 static int gp8psk_fe_send_legacy_dish_cmd (struct dvb_frontend* fe, unsigned long sw_cmd)
 289 {
 290         struct gp8psk_fe_state* state = fe->demodulator_priv;
 291         u8 cmd = sw_cmd & 0x7f;
 292
 293         if (gp8psk_usb_out_op(state->d,SET_DN_SWITCH, cmd, 0,
 294                         NULL, 0)) {
 295                 return -EINVAL;
 296         }
 297         if (gp8psk_usb_out_op(state->d,SET_LNB_VOLTAGE, !!(sw_cmd & 0x80),
 298                         0, NULL, 0)) {
 299                 return -EINVAL;
 300         }
 301
 302         return 0;
 303 }
 304
 305 static void gp8psk_fe_release(struct dvb_frontend* fe)
 306 {
 307         struct gp8psk_fe_state *state = fe->demodulator_priv;
 308         kfree(state);
 309 }
 310
 311 static struct dvb_frontend_ops gp8psk_fe_ops;
 312
 313 struct dvb_frontend * gp8psk_fe_attach(struct dvb_usb_device *d)
 314 {
 315         struct gp8psk_fe_state *s = kzalloc(sizeof(struct gp8psk_fe_state), GFP_KERNEL);
 316         if (s == NULL)
 317                 goto error;
 318
 319         s->d = d;
 320         memcpy(&s->fe.ops, &gp8psk_fe_ops, sizeof(struct dvb_frontend_ops));
 321         s->fe.demodulator_priv = s;
 322
 323         goto success;
 324 error:
 325         return NULL;
 326 success:
 327         return &s->fe;
 328 }
 329
 330
 331 static struct dvb_frontend_ops gp8psk_fe_ops = {
 332         .delsys = { SYS_DVBS },
 333         .info = {
 334                 .name                   = "Genpix DVB-S",
 335                 .frequency_min          = 800000,
 336                 .frequency_max          = 2250000,
 337                 .frequency_stepsize     = 100,
 338                 .symbol_rate_min        = 1000000,
 339                 .symbol_rate_max        = 45000000,
 340                 .symbol_rate_tolerance  = 500,  /* ppm */
 341                 .caps = FE_CAN_INVERSION_AUTO |
 342                         FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
 343                         FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
 344                         /*
 345                          * FE_CAN_QAM_16 is for compatibility
 346                          * (Myth incorrectly detects Turbo-QPSK as plain QAM-16)
 347                          */
 348                         FE_CAN_QPSK | FE_CAN_QAM_16 | FE_CAN_TURBO_FEC
 349         },
 350
 351         .release = gp8psk_fe_release,
 352
 353         .init = NULL,
 354         .sleep = NULL,
 355
 356         .set_frontend = gp8psk_fe_set_frontend,
 357
 358         .get_tune_settings = gp8psk_fe_get_tune_settings,
 359
 360         .read_status = gp8psk_fe_read_status,
 361         .read_ber = gp8psk_fe_read_ber,
 362         .read_signal_strength = gp8psk_fe_read_signal_strength,
 363         .read_snr = gp8psk_fe_read_snr,
 364         .read_ucblocks = gp8psk_fe_read_unc_blocks,
 365
 366         .diseqc_send_master_cmd = gp8psk_fe_send_diseqc_msg,
 367         .diseqc_send_burst = gp8psk_fe_send_diseqc_burst,
 368         .set_tone = gp8psk_fe_set_tone,
 369         .set_voltage = gp8psk_fe_set_voltage,
 370         .dishnetwork_send_legacy_command = gp8psk_fe_send_legacy_dish_cmd,
 371         .enable_high_lnb_voltage = gp8psk_fe_enable_high_lnb_voltage
 372 };