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