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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * Frontend driver for the GENPIX 8pks/qpsk/DCII USB2.0 DVB-S module4 *5 * Copyright (C) 2006,2007 Alan Nisota (alannisota@gmail.com)6 * Copyright (C) 2006,2007 Genpix Electronics (genpix@genpix-electronics.com)7 *8 * Thanks to GENPIX for the sample code used to implement this module.9 *10 * This module is based off the vp7045 and vp702x modules11 */12 13#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt14 15#include "gp8psk-fe.h"16#include <media/dvb_frontend.h>17 18static int debug;19module_param(debug, int, 0644);20MODULE_PARM_DESC(debug, "Turn on/off debugging (default:off).");21 22#define dprintk(fmt, arg...) do { \23 if (debug) \24 printk(KERN_DEBUG pr_fmt("%s: " fmt), \25 __func__, ##arg); \26} while (0)27 28struct gp8psk_fe_state {29 struct dvb_frontend fe;30 void *priv;31 const struct gp8psk_fe_ops *ops;32 bool is_rev1;33 u8 lock;34 u16 snr;35 unsigned long next_status_check;36 unsigned long status_check_interval;37};38 39static int gp8psk_tuned_to_DCII(struct dvb_frontend *fe)40{41 struct gp8psk_fe_state *st = fe->demodulator_priv;42 u8 status;43 44 st->ops->in(st->priv, GET_8PSK_CONFIG, 0, 0, &status, 1);45 return status & bmDCtuned;46}47 48static int gp8psk_set_tuner_mode(struct dvb_frontend *fe, int mode)49{50 struct gp8psk_fe_state *st = fe->demodulator_priv;51 52 return st->ops->out(st->priv, SET_8PSK_CONFIG, mode, 0, NULL, 0);53}54 55static int gp8psk_fe_update_status(struct gp8psk_fe_state *st)56{57 u8 buf[6];58 if (time_after(jiffies,st->next_status_check)) {59 st->ops->in(st->priv, GET_SIGNAL_LOCK, 0, 0, &st->lock, 1);60 st->ops->in(st->priv, GET_SIGNAL_STRENGTH, 0, 0, buf, 6);61 st->snr = (buf[1]) << 8 | buf[0];62 st->next_status_check = jiffies + (st->status_check_interval*HZ)/1000;63 }64 return 0;65}66 67static int gp8psk_fe_read_status(struct dvb_frontend *fe,68 enum fe_status *status)69{70 struct gp8psk_fe_state *st = fe->demodulator_priv;71 gp8psk_fe_update_status(st);72 73 if (st->lock)74 *status = FE_HAS_LOCK | FE_HAS_SYNC | FE_HAS_VITERBI | FE_HAS_SIGNAL | FE_HAS_CARRIER;75 else76 *status = 0;77 78 if (*status & FE_HAS_LOCK)79 st->status_check_interval = 1000;80 else81 st->status_check_interval = 100;82 return 0;83}84 85/* not supported by this Frontend */86static int gp8psk_fe_read_ber(struct dvb_frontend* fe, u32 *ber)87{88 (void) fe;89 *ber = 0;90 return 0;91}92 93/* not supported by this Frontend */94static int gp8psk_fe_read_unc_blocks(struct dvb_frontend* fe, u32 *unc)95{96 (void) fe;97 *unc = 0;98 return 0;99}100 101static int gp8psk_fe_read_snr(struct dvb_frontend* fe, u16 *snr)102{103 struct gp8psk_fe_state *st = fe->demodulator_priv;104 gp8psk_fe_update_status(st);105 /* snr is reported in dBu*256 */106 *snr = st->snr;107 return 0;108}109 110static int gp8psk_fe_read_signal_strength(struct dvb_frontend* fe, u16 *strength)111{112 struct gp8psk_fe_state *st = fe->demodulator_priv;113 gp8psk_fe_update_status(st);114 /* snr is reported in dBu*256 */115 /* snr / 38.4 ~= 100% strength */116 /* snr * 17 returns 100% strength as 65535 */117 if (st->snr > 0xf00)118 *strength = 0xffff;119 else120 *strength = (st->snr << 4) + st->snr; /* snr*17 */121 return 0;122}123 124static int gp8psk_fe_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings *tune)125{126 tune->min_delay_ms = 800;127 return 0;128}129 130static int gp8psk_fe_set_frontend(struct dvb_frontend *fe)131{132 struct gp8psk_fe_state *st = fe->demodulator_priv;133 struct dtv_frontend_properties *c = &fe->dtv_property_cache;134 u8 cmd[10];135 u32 freq = c->frequency * 1000;136 137 dprintk("%s()\n", __func__);138 139 cmd[4] = freq & 0xff;140 cmd[5] = (freq >> 8) & 0xff;141 cmd[6] = (freq >> 16) & 0xff;142 cmd[7] = (freq >> 24) & 0xff;143 144 /* backwards compatibility: DVB-S + 8-PSK were used for Turbo-FEC */145 if (c->delivery_system == SYS_DVBS && c->modulation == PSK_8)146 c->delivery_system = SYS_TURBO;147 148 switch (c->delivery_system) {149 case SYS_DVBS:150 if (c->modulation != QPSK) {151 dprintk("%s: unsupported modulation selected (%d)\n",152 __func__, c->modulation);153 return -EOPNOTSUPP;154 }155 c->fec_inner = FEC_AUTO;156 break;157 case SYS_DVBS2: /* kept for backwards compatibility */158 dprintk("%s: DVB-S2 delivery system selected\n", __func__);159 break;160 case SYS_TURBO:161 dprintk("%s: Turbo-FEC delivery system selected\n", __func__);162 break;163 164 default:165 dprintk("%s: unsupported delivery system selected (%d)\n",166 __func__, c->delivery_system);167 return -EOPNOTSUPP;168 }169 170 cmd[0] = c->symbol_rate & 0xff;171 cmd[1] = (c->symbol_rate >> 8) & 0xff;172 cmd[2] = (c->symbol_rate >> 16) & 0xff;173 cmd[3] = (c->symbol_rate >> 24) & 0xff;174 switch (c->modulation) {175 case QPSK:176 if (st->is_rev1)177 if (gp8psk_tuned_to_DCII(fe))178 st->ops->reload(st->priv);179 switch (c->fec_inner) {180 case FEC_1_2:181 cmd[9] = 0; break;182 case FEC_2_3:183 cmd[9] = 1; break;184 case FEC_3_4:185 cmd[9] = 2; break;186 case FEC_5_6:187 cmd[9] = 3; break;188 case FEC_7_8:189 cmd[9] = 4; break;190 case FEC_AUTO:191 cmd[9] = 5; break;192 default:193 cmd[9] = 5; break;194 }195 if (c->delivery_system == SYS_TURBO)196 cmd[8] = ADV_MOD_TURBO_QPSK;197 else198 cmd[8] = ADV_MOD_DVB_QPSK;199 break;200 case PSK_8: /* PSK_8 is for compatibility with DN */201 cmd[8] = ADV_MOD_TURBO_8PSK;202 switch (c->fec_inner) {203 case FEC_2_3:204 cmd[9] = 0; break;205 case FEC_3_4:206 cmd[9] = 1; break;207 case FEC_3_5:208 cmd[9] = 2; break;209 case FEC_5_6:210 cmd[9] = 3; break;211 case FEC_8_9:212 cmd[9] = 4; break;213 default:214 cmd[9] = 0; break;215 }216 break;217 case QAM_16: /* QAM_16 is for compatibility with DN */218 cmd[8] = ADV_MOD_TURBO_16QAM;219 cmd[9] = 0;220 break;221 default: /* Unknown modulation */222 dprintk("%s: unsupported modulation selected (%d)\n",223 __func__, c->modulation);224 return -EOPNOTSUPP;225 }226 227 if (st->is_rev1)228 gp8psk_set_tuner_mode(fe, 0);229 st->ops->out(st->priv, TUNE_8PSK, 0, 0, cmd, 10);230 231 st->lock = 0;232 st->next_status_check = jiffies;233 st->status_check_interval = 200;234 235 return 0;236}237 238static int gp8psk_fe_send_diseqc_msg (struct dvb_frontend* fe,239 struct dvb_diseqc_master_cmd *m)240{241 struct gp8psk_fe_state *st = fe->demodulator_priv;242 243 dprintk("%s\n", __func__);244 245 if (st->ops->out(st->priv, SEND_DISEQC_COMMAND, m->msg[0], 0,246 m->msg, m->msg_len)) {247 return -EINVAL;248 }249 return 0;250}251 252static int gp8psk_fe_send_diseqc_burst(struct dvb_frontend *fe,253 enum fe_sec_mini_cmd burst)254{255 struct gp8psk_fe_state *st = fe->demodulator_priv;256 u8 cmd;257 258 dprintk("%s\n", __func__);259 260 /* These commands are certainly wrong */261 cmd = (burst == SEC_MINI_A) ? 0x00 : 0x01;262 263 if (st->ops->out(st->priv, SEND_DISEQC_COMMAND, cmd, 0,264 &cmd, 0)) {265 return -EINVAL;266 }267 return 0;268}269 270static int gp8psk_fe_set_tone(struct dvb_frontend *fe,271 enum fe_sec_tone_mode tone)272{273 struct gp8psk_fe_state *st = fe->demodulator_priv;274 275 if (st->ops->out(st->priv, SET_22KHZ_TONE,276 (tone == SEC_TONE_ON), 0, NULL, 0)) {277 return -EINVAL;278 }279 return 0;280}281 282static int gp8psk_fe_set_voltage(struct dvb_frontend *fe,283 enum fe_sec_voltage voltage)284{285 struct gp8psk_fe_state *st = fe->demodulator_priv;286 287 if (st->ops->out(st->priv, SET_LNB_VOLTAGE,288 voltage == SEC_VOLTAGE_18, 0, NULL, 0)) {289 return -EINVAL;290 }291 return 0;292}293 294static int gp8psk_fe_enable_high_lnb_voltage(struct dvb_frontend* fe, long onoff)295{296 struct gp8psk_fe_state *st = fe->demodulator_priv;297 298 return st->ops->out(st->priv, USE_EXTRA_VOLT, onoff, 0, NULL, 0);299}300 301static int gp8psk_fe_send_legacy_dish_cmd (struct dvb_frontend* fe, unsigned long sw_cmd)302{303 struct gp8psk_fe_state *st = fe->demodulator_priv;304 u8 cmd = sw_cmd & 0x7f;305 306 if (st->ops->out(st->priv, SET_DN_SWITCH, cmd, 0, NULL, 0))307 return -EINVAL;308 309 if (st->ops->out(st->priv, SET_LNB_VOLTAGE, !!(sw_cmd & 0x80),310 0, NULL, 0))311 return -EINVAL;312 313 return 0;314}315 316static void gp8psk_fe_release(struct dvb_frontend* fe)317{318 struct gp8psk_fe_state *st = fe->demodulator_priv;319 320 kfree(st);321}322 323static const struct dvb_frontend_ops gp8psk_fe_ops;324 325struct dvb_frontend *gp8psk_fe_attach(const struct gp8psk_fe_ops *ops,326 void *priv, bool is_rev1)327{328 struct gp8psk_fe_state *st;329 330 if (!ops || !ops->in || !ops->out || !ops->reload) {331 pr_err("Error! gp8psk-fe ops not defined.\n");332 return NULL;333 }334 335 st = kzalloc(sizeof(struct gp8psk_fe_state), GFP_KERNEL);336 if (!st)337 return NULL;338 339 memcpy(&st->fe.ops, &gp8psk_fe_ops, sizeof(struct dvb_frontend_ops));340 st->fe.demodulator_priv = st;341 st->ops = ops;342 st->priv = priv;343 st->is_rev1 = is_rev1;344 345 pr_info("Frontend %sattached\n", is_rev1 ? "revision 1 " : "");346 347 return &st->fe;348}349EXPORT_SYMBOL_GPL(gp8psk_fe_attach);350 351static const struct dvb_frontend_ops gp8psk_fe_ops = {352 .delsys = { SYS_DVBS },353 .info = {354 .name = "Genpix DVB-S",355 .frequency_min_hz = 800 * MHz,356 .frequency_max_hz = 2250 * MHz,357 .frequency_stepsize_hz = 100 * kHz,358 .symbol_rate_min = 1000000,359 .symbol_rate_max = 45000000,360 .symbol_rate_tolerance = 500, /* ppm */361 .caps = FE_CAN_INVERSION_AUTO |362 FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |363 FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |364 /*365 * FE_CAN_QAM_16 is for compatibility366 * (Myth incorrectly detects Turbo-QPSK as plain QAM-16)367 */368 FE_CAN_QPSK | FE_CAN_QAM_16 | FE_CAN_TURBO_FEC369 },370 371 .release = gp8psk_fe_release,372 373 .init = NULL,374 .sleep = NULL,375 376 .set_frontend = gp8psk_fe_set_frontend,377 378 .get_tune_settings = gp8psk_fe_get_tune_settings,379 380 .read_status = gp8psk_fe_read_status,381 .read_ber = gp8psk_fe_read_ber,382 .read_signal_strength = gp8psk_fe_read_signal_strength,383 .read_snr = gp8psk_fe_read_snr,384 .read_ucblocks = gp8psk_fe_read_unc_blocks,385 386 .diseqc_send_master_cmd = gp8psk_fe_send_diseqc_msg,387 .diseqc_send_burst = gp8psk_fe_send_diseqc_burst,388 .set_tone = gp8psk_fe_set_tone,389 .set_voltage = gp8psk_fe_set_voltage,390 .dishnetwork_send_legacy_command = gp8psk_fe_send_legacy_dish_cmd,391 .enable_high_lnb_voltage = gp8psk_fe_enable_high_lnb_voltage392};393 394MODULE_AUTHOR("Alan Nisota <alannisota@gamil.com>");395MODULE_DESCRIPTION("Frontend Driver for Genpix DVB-S");396MODULE_VERSION("1.1");397MODULE_LICENSE("GPL");398