2 * Frontend driver for the GENPIX 8pks/qpsk/DCII USB2.0 DVB-S module
4 * Copyright (C) 2006,2007 Alan Nisota (alannisota@gmail.com)
5 * Copyright (C) 2006,2007 Genpix Electronics (genpix@genpix-electronics.com)
7 * Thanks to GENPIX for the sample code used to implement this module.
9 * This module is based off the vp7045 and vp702x modules
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.
16 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
18 #include "gp8psk-fe.h"
19 #include "dvb_frontend.h"
22 module_param(debug, int, 0644);
23 MODULE_PARM_DESC(debug, "Turn on/off debugging (default:off).");
25 #define dprintk(fmt, arg...) do { \
27 printk(KERN_DEBUG pr_fmt("%s: " fmt), \
31 struct gp8psk_fe_state {
32 struct dvb_frontend fe;
34 const struct gp8psk_fe_ops *ops;
38 unsigned long next_status_check;
39 unsigned long status_check_interval;
42 static int gp8psk_tuned_to_DCII(struct dvb_frontend *fe)
44 struct gp8psk_fe_state *st = fe->demodulator_priv;
47 st->ops->in(st->priv, GET_8PSK_CONFIG, 0, 0, &status, 1);
48 return status & bmDCtuned;
51 static int gp8psk_set_tuner_mode(struct dvb_frontend *fe, int mode)
53 struct gp8psk_fe_state *st = fe->demodulator_priv;
55 return st->ops->out(st->priv, SET_8PSK_CONFIG, mode, 0, NULL, 0);
58 static int gp8psk_fe_update_status(struct gp8psk_fe_state *st)
61 if (time_after(jiffies,st->next_status_check)) {
62 st->ops->in(st->priv, GET_SIGNAL_LOCK, 0, 0, &st->lock, 1);
63 st->ops->in(st->priv, GET_SIGNAL_STRENGTH, 0, 0, buf, 6);
64 st->snr = (buf[1]) << 8 | buf[0];
65 st->next_status_check = jiffies + (st->status_check_interval*HZ)/1000;
70 static int gp8psk_fe_read_status(struct dvb_frontend *fe,
71 enum fe_status *status)
73 struct gp8psk_fe_state *st = fe->demodulator_priv;
74 gp8psk_fe_update_status(st);
77 *status = FE_HAS_LOCK | FE_HAS_SYNC | FE_HAS_VITERBI | FE_HAS_SIGNAL | FE_HAS_CARRIER;
81 if (*status & FE_HAS_LOCK)
82 st->status_check_interval = 1000;
84 st->status_check_interval = 100;
88 /* not supported by this Frontend */
89 static int gp8psk_fe_read_ber(struct dvb_frontend* fe, u32 *ber)
96 /* not supported by this Frontend */
97 static int gp8psk_fe_read_unc_blocks(struct dvb_frontend* fe, u32 *unc)
104 static int gp8psk_fe_read_snr(struct dvb_frontend* fe, u16 *snr)
106 struct gp8psk_fe_state *st = fe->demodulator_priv;
107 gp8psk_fe_update_status(st);
108 /* snr is reported in dBu*256 */
113 static int gp8psk_fe_read_signal_strength(struct dvb_frontend* fe, u16 *strength)
115 struct gp8psk_fe_state *st = fe->demodulator_priv;
116 gp8psk_fe_update_status(st);
117 /* snr is reported in dBu*256 */
118 /* snr / 38.4 ~= 100% strength */
119 /* snr * 17 returns 100% strength as 65535 */
123 *strength = (st->snr << 4) + st->snr; /* snr*17 */
127 static int gp8psk_fe_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings *tune)
129 tune->min_delay_ms = 800;
133 static int gp8psk_fe_set_frontend(struct dvb_frontend *fe)
135 struct gp8psk_fe_state *st = fe->demodulator_priv;
136 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
138 u32 freq = c->frequency * 1000;
140 dprintk("%s()\n", __func__);
142 cmd[4] = freq & 0xff;
143 cmd[5] = (freq >> 8) & 0xff;
144 cmd[6] = (freq >> 16) & 0xff;
145 cmd[7] = (freq >> 24) & 0xff;
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;
151 switch (c->delivery_system) {
153 if (c->modulation != QPSK) {
154 dprintk("%s: unsupported modulation selected (%d)\n",
155 __func__, c->modulation);
158 c->fec_inner = FEC_AUTO;
160 case SYS_DVBS2: /* kept for backwards compatibility */
161 dprintk("%s: DVB-S2 delivery system selected\n", __func__);
164 dprintk("%s: Turbo-FEC delivery system selected\n", __func__);
168 dprintk("%s: unsupported delivery system selected (%d)\n",
169 __func__, c->delivery_system);
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) {
180 if (gp8psk_tuned_to_DCII(fe))
181 st->ops->reload(st->priv);
182 switch (c->fec_inner) {
198 if (c->delivery_system == SYS_TURBO)
199 cmd[8] = ADV_MOD_TURBO_QPSK;
201 cmd[8] = ADV_MOD_DVB_QPSK;
203 case PSK_8: /* PSK_8 is for compatibility with DN */
204 cmd[8] = ADV_MOD_TURBO_8PSK;
205 switch (c->fec_inner) {
220 case QAM_16: /* QAM_16 is for compatibility with DN */
221 cmd[8] = ADV_MOD_TURBO_16QAM;
224 default: /* Unknown modulation */
225 dprintk("%s: unsupported modulation selected (%d)\n",
226 __func__, c->modulation);
231 gp8psk_set_tuner_mode(fe, 0);
232 st->ops->out(st->priv, TUNE_8PSK, 0, 0, cmd, 10);
235 st->next_status_check = jiffies;
236 st->status_check_interval = 200;
241 static int gp8psk_fe_send_diseqc_msg (struct dvb_frontend* fe,
242 struct dvb_diseqc_master_cmd *m)
244 struct gp8psk_fe_state *st = fe->demodulator_priv;
246 dprintk("%s\n", __func__);
248 if (st->ops->out(st->priv, SEND_DISEQC_COMMAND, m->msg[0], 0,
249 m->msg, m->msg_len)) {
255 static int gp8psk_fe_send_diseqc_burst(struct dvb_frontend *fe,
256 enum fe_sec_mini_cmd burst)
258 struct gp8psk_fe_state *st = fe->demodulator_priv;
261 dprintk("%s\n", __func__);
263 /* These commands are certainly wrong */
264 cmd = (burst == SEC_MINI_A) ? 0x00 : 0x01;
266 if (st->ops->out(st->priv, SEND_DISEQC_COMMAND, cmd, 0,
273 static int gp8psk_fe_set_tone(struct dvb_frontend *fe,
274 enum fe_sec_tone_mode tone)
276 struct gp8psk_fe_state *st = fe->demodulator_priv;
278 if (st->ops->out(st->priv, SET_22KHZ_TONE,
279 (tone == SEC_TONE_ON), 0, NULL, 0)) {
285 static int gp8psk_fe_set_voltage(struct dvb_frontend *fe,
286 enum fe_sec_voltage voltage)
288 struct gp8psk_fe_state *st = fe->demodulator_priv;
290 if (st->ops->out(st->priv, SET_LNB_VOLTAGE,
291 voltage == SEC_VOLTAGE_18, 0, NULL, 0)) {
297 static int gp8psk_fe_enable_high_lnb_voltage(struct dvb_frontend* fe, long onoff)
299 struct gp8psk_fe_state *st = fe->demodulator_priv;
301 return st->ops->out(st->priv, USE_EXTRA_VOLT, onoff, 0, NULL, 0);
304 static int gp8psk_fe_send_legacy_dish_cmd (struct dvb_frontend* fe, unsigned long sw_cmd)
306 struct gp8psk_fe_state *st = fe->demodulator_priv;
307 u8 cmd = sw_cmd & 0x7f;
309 if (st->ops->out(st->priv, SET_DN_SWITCH, cmd, 0, NULL, 0))
312 if (st->ops->out(st->priv, SET_LNB_VOLTAGE, !!(sw_cmd & 0x80),
319 static void gp8psk_fe_release(struct dvb_frontend* fe)
321 struct gp8psk_fe_state *st = fe->demodulator_priv;
326 static const struct dvb_frontend_ops gp8psk_fe_ops;
328 struct dvb_frontend *gp8psk_fe_attach(const struct gp8psk_fe_ops *ops,
329 void *priv, bool is_rev1)
331 struct gp8psk_fe_state *st;
333 if (!ops || !ops->in || !ops->out || !ops->reload) {
334 pr_err("Error! gp8psk-fe ops not defined.\n");
338 st = kzalloc(sizeof(struct gp8psk_fe_state), GFP_KERNEL);
342 memcpy(&st->fe.ops, &gp8psk_fe_ops, sizeof(struct dvb_frontend_ops));
343 st->fe.demodulator_priv = st;
346 st->is_rev1 = is_rev1;
348 pr_info("Frontend %sattached\n", is_rev1 ? "revision 1 " : "");
352 EXPORT_SYMBOL_GPL(gp8psk_fe_attach);
354 static const struct dvb_frontend_ops gp8psk_fe_ops = {
355 .delsys = { SYS_DVBS },
357 .name = "Genpix DVB-S",
358 .frequency_min = 800000,
359 .frequency_max = 2250000,
360 .frequency_stepsize = 100,
361 .symbol_rate_min = 1000000,
362 .symbol_rate_max = 45000000,
363 .symbol_rate_tolerance = 500, /* ppm */
364 .caps = FE_CAN_INVERSION_AUTO |
365 FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
366 FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
368 * FE_CAN_QAM_16 is for compatibility
369 * (Myth incorrectly detects Turbo-QPSK as plain QAM-16)
371 FE_CAN_QPSK | FE_CAN_QAM_16 | FE_CAN_TURBO_FEC
374 .release = gp8psk_fe_release,
379 .set_frontend = gp8psk_fe_set_frontend,
381 .get_tune_settings = gp8psk_fe_get_tune_settings,
383 .read_status = gp8psk_fe_read_status,
384 .read_ber = gp8psk_fe_read_ber,
385 .read_signal_strength = gp8psk_fe_read_signal_strength,
386 .read_snr = gp8psk_fe_read_snr,
387 .read_ucblocks = gp8psk_fe_read_unc_blocks,
389 .diseqc_send_master_cmd = gp8psk_fe_send_diseqc_msg,
390 .diseqc_send_burst = gp8psk_fe_send_diseqc_burst,
391 .set_tone = gp8psk_fe_set_tone,
392 .set_voltage = gp8psk_fe_set_voltage,
393 .dishnetwork_send_legacy_command = gp8psk_fe_send_legacy_dish_cmd,
394 .enable_high_lnb_voltage = gp8psk_fe_enable_high_lnb_voltage
397 MODULE_AUTHOR("Alan Nisota <alannisota@gamil.com>");
398 MODULE_DESCRIPTION("Frontend Driver for Genpix DVB-S");
399 MODULE_VERSION("1.1");
400 MODULE_LICENSE("GPL");