1 /*
2 * Frontend driver for the 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
16 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
17
18 #include "gp8psk-fe.h"
19 #include <media/dvb_frontend.h>
20
21 static int debug;
22 module_param(debug, int, 0644);
23 MODULE_PARM_DESC(debug, "Turn on/off debugging (default:off).");
24
25 #define dprintk(fmt, arg...) do { \
26 if (debug) \
27 printk(KERN_DEBUG pr_fmt("%s: " fmt), \
28 __func__, ##arg); \
29 } while (0)
30
31 struct gp8psk_fe_state {
32 struct dvb_frontend fe;
33 void *priv;
34 const struct gp8psk_fe_ops *ops;
35 bool is_rev1;
36 u8 lock;
37 u16 snr;
38 unsigned long next_status_check;
39 unsigned long status_check_interval;
40 };
41
gp8psk_tuned_to_DCII(struct dvb_frontend * fe)42 static int gp8psk_tuned_to_DCII(struct dvb_frontend *fe)
43 {
44 struct gp8psk_fe_state *st = fe->demodulator_priv;
45 u8 status;
46
47 st->ops->in(st->priv, GET_8PSK_CONFIG, 0, 0, &status, 1);
48 return status & bmDCtuned;
49 }
50
gp8psk_set_tuner_mode(struct dvb_frontend * fe,int mode)51 static int gp8psk_set_tuner_mode(struct dvb_frontend *fe, int mode)
52 {
53 struct gp8psk_fe_state *st = fe->demodulator_priv;
54
55 return st->ops->out(st->priv, SET_8PSK_CONFIG, mode, 0, NULL, 0);
56 }
57
gp8psk_fe_update_status(struct gp8psk_fe_state * st)58 static int gp8psk_fe_update_status(struct gp8psk_fe_state *st)
59 {
60 u8 buf[6];
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;
66 }
67 return 0;
68 }
69
gp8psk_fe_read_status(struct dvb_frontend * fe,enum fe_status * status)70 static int gp8psk_fe_read_status(struct dvb_frontend *fe,
71 enum fe_status *status)
72 {
73 struct gp8psk_fe_state *st = fe->demodulator_priv;
74 gp8psk_fe_update_status(st);
75
76 if (st->lock)
77 *status = FE_HAS_LOCK | FE_HAS_SYNC | FE_HAS_VITERBI | FE_HAS_SIGNAL | FE_HAS_CARRIER;
78 else
79 *status = 0;
80
81 if (*status & FE_HAS_LOCK)
82 st->status_check_interval = 1000;
83 else
84 st->status_check_interval = 100;
85 return 0;
86 }
87
88 /* not supported by this Frontend */
gp8psk_fe_read_ber(struct dvb_frontend * fe,u32 * ber)89 static int gp8psk_fe_read_ber(struct dvb_frontend* fe, u32 *ber)
90 {
91 (void) fe;
92 *ber = 0;
93 return 0;
94 }
95
96 /* not supported by this Frontend */
gp8psk_fe_read_unc_blocks(struct dvb_frontend * fe,u32 * unc)97 static int gp8psk_fe_read_unc_blocks(struct dvb_frontend* fe, u32 *unc)
98 {
99 (void) fe;
100 *unc = 0;
101 return 0;
102 }
103
gp8psk_fe_read_snr(struct dvb_frontend * fe,u16 * snr)104 static int gp8psk_fe_read_snr(struct dvb_frontend* fe, u16 *snr)
105 {
106 struct gp8psk_fe_state *st = fe->demodulator_priv;
107 gp8psk_fe_update_status(st);
108 /* snr is reported in dBu*256 */
109 *snr = st->snr;
110 return 0;
111 }
112
gp8psk_fe_read_signal_strength(struct dvb_frontend * fe,u16 * strength)113 static int gp8psk_fe_read_signal_strength(struct dvb_frontend* fe, u16 *strength)
114 {
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 */
120 if (st->snr > 0xf00)
121 *strength = 0xffff;
122 else
123 *strength = (st->snr << 4) + st->snr; /* snr*17 */
124 return 0;
125 }
126
gp8psk_fe_get_tune_settings(struct dvb_frontend * fe,struct dvb_frontend_tune_settings * tune)127 static int gp8psk_fe_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings *tune)
128 {
129 tune->min_delay_ms = 800;
130 return 0;
131 }
132
gp8psk_fe_set_frontend(struct dvb_frontend * fe)133 static int gp8psk_fe_set_frontend(struct dvb_frontend *fe)
134 {
135 struct gp8psk_fe_state *st = fe->demodulator_priv;
136 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
137 u8 cmd[10];
138 u32 freq = c->frequency * 1000;
139
140 dprintk("%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 dprintk("%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 dprintk("%s: DVB-S2 delivery system selected\n", __func__);
162 break;
163 case SYS_TURBO:
164 dprintk("%s: Turbo-FEC delivery system selected\n", __func__);
165 break;
166
167 default:
168 dprintk("%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 (st->is_rev1)
180 if (gp8psk_tuned_to_DCII(fe))
181 st->ops->reload(st->priv);
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 dprintk("%s: unsupported modulation selected (%d)\n",
226 __func__, c->modulation);
227 return -EOPNOTSUPP;
228 }
229
230 if (st->is_rev1)
231 gp8psk_set_tuner_mode(fe, 0);
232 st->ops->out(st->priv, TUNE_8PSK, 0, 0, cmd, 10);
233
234 st->lock = 0;
235 st->next_status_check = jiffies;
236 st->status_check_interval = 200;
237
238 return 0;
239 }
240
gp8psk_fe_send_diseqc_msg(struct dvb_frontend * fe,struct dvb_diseqc_master_cmd * m)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 dprintk("%s\n", __func__);
247
248 if (st->ops->out(st->priv, SEND_DISEQC_COMMAND, m->msg[0], 0,
249 m->msg, m->msg_len)) {
250 return -EINVAL;
251 }
252 return 0;
253 }
254
gp8psk_fe_send_diseqc_burst(struct dvb_frontend * fe,enum fe_sec_mini_cmd burst)255 static int gp8psk_fe_send_diseqc_burst(struct dvb_frontend *fe,
256 enum fe_sec_mini_cmd burst)
257 {
258 struct gp8psk_fe_state *st = fe->demodulator_priv;
259 u8 cmd;
260
261 dprintk("%s\n", __func__);
262
263 /* These commands are certainly wrong */
264 cmd = (burst == SEC_MINI_A) ? 0x00 : 0x01;
265
266 if (st->ops->out(st->priv, SEND_DISEQC_COMMAND, cmd, 0,
267 &cmd, 0)) {
268 return -EINVAL;
269 }
270 return 0;
271 }
272
gp8psk_fe_set_tone(struct dvb_frontend * fe,enum fe_sec_tone_mode tone)273 static int gp8psk_fe_set_tone(struct dvb_frontend *fe,
274 enum fe_sec_tone_mode tone)
275 {
276 struct gp8psk_fe_state *st = fe->demodulator_priv;
277
278 if (st->ops->out(st->priv, SET_22KHZ_TONE,
279 (tone == SEC_TONE_ON), 0, NULL, 0)) {
280 return -EINVAL;
281 }
282 return 0;
283 }
284
gp8psk_fe_set_voltage(struct dvb_frontend * fe,enum fe_sec_voltage voltage)285 static int gp8psk_fe_set_voltage(struct dvb_frontend *fe,
286 enum fe_sec_voltage voltage)
287 {
288 struct gp8psk_fe_state *st = fe->demodulator_priv;
289
290 if (st->ops->out(st->priv, SET_LNB_VOLTAGE,
291 voltage == SEC_VOLTAGE_18, 0, NULL, 0)) {
292 return -EINVAL;
293 }
294 return 0;
295 }
296
gp8psk_fe_enable_high_lnb_voltage(struct dvb_frontend * fe,long onoff)297 static int gp8psk_fe_enable_high_lnb_voltage(struct dvb_frontend* fe, long onoff)
298 {
299 struct gp8psk_fe_state *st = fe->demodulator_priv;
300
301 return st->ops->out(st->priv, USE_EXTRA_VOLT, onoff, 0, NULL, 0);
302 }
303
gp8psk_fe_send_legacy_dish_cmd(struct dvb_frontend * fe,unsigned long sw_cmd)304 static int gp8psk_fe_send_legacy_dish_cmd (struct dvb_frontend* fe, unsigned long sw_cmd)
305 {
306 struct gp8psk_fe_state *st = fe->demodulator_priv;
307 u8 cmd = sw_cmd & 0x7f;
308
309 if (st->ops->out(st->priv, SET_DN_SWITCH, cmd, 0, NULL, 0))
310 return -EINVAL;
311
312 if (st->ops->out(st->priv, SET_LNB_VOLTAGE, !!(sw_cmd & 0x80),
313 0, NULL, 0))
314 return -EINVAL;
315
316 return 0;
317 }
318
gp8psk_fe_release(struct dvb_frontend * fe)319 static void gp8psk_fe_release(struct dvb_frontend* fe)
320 {
321 struct gp8psk_fe_state *st = fe->demodulator_priv;
322
323 kfree(st);
324 }
325
326 static const struct dvb_frontend_ops gp8psk_fe_ops;
327
gp8psk_fe_attach(const struct gp8psk_fe_ops * ops,void * priv,bool is_rev1)328 struct dvb_frontend *gp8psk_fe_attach(const struct gp8psk_fe_ops *ops,
329 void *priv, bool is_rev1)
330 {
331 struct gp8psk_fe_state *st;
332
333 if (!ops || !ops->in || !ops->out || !ops->reload) {
334 pr_err("Error! gp8psk-fe ops not defined.\n");
335 return NULL;
336 }
337
338 st = kzalloc(sizeof(struct gp8psk_fe_state), GFP_KERNEL);
339 if (!st)
340 return NULL;
341
342 memcpy(&st->fe.ops, &gp8psk_fe_ops, sizeof(struct dvb_frontend_ops));
343 st->fe.demodulator_priv = st;
344 st->ops = ops;
345 st->priv = priv;
346 st->is_rev1 = is_rev1;
347
348 pr_info("Frontend %sattached\n", is_rev1 ? "revision 1 " : "");
349
350 return &st->fe;
351 }
352 EXPORT_SYMBOL_GPL(gp8psk_fe_attach);
353
354 static const struct dvb_frontend_ops gp8psk_fe_ops = {
355 .delsys = { SYS_DVBS },
356 .info = {
357 .name = "Genpix DVB-S",
358 .frequency_min_hz = 800 * MHz,
359 .frequency_max_hz = 2250 * MHz,
360 .frequency_stepsize_hz = 100 * kHz,
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 |
367 /*
368 * FE_CAN_QAM_16 is for compatibility
369 * (Myth incorrectly detects Turbo-QPSK as plain QAM-16)
370 */
371 FE_CAN_QPSK | FE_CAN_QAM_16 | FE_CAN_TURBO_FEC
372 },
373
374 .release = gp8psk_fe_release,
375
376 .init = NULL,
377 .sleep = NULL,
378
379 .set_frontend = gp8psk_fe_set_frontend,
380
381 .get_tune_settings = gp8psk_fe_get_tune_settings,
382
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,
388
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
395 };
396
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");
401
