1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Frontend driver for the GENPIX 8pks/qpsk/DCII USB2.0 DVB-S module
4 *
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 modules
11 */
12
13 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
14
15 #include "gp8psk-fe.h"
16 #include <media/dvb_frontend.h>
17
18 static int debug;
19 module_param(debug, int, 0644);
20 MODULE_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
28 struct 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
gp8psk_tuned_to_DCII(struct dvb_frontend * fe)39 static 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
gp8psk_set_tuner_mode(struct dvb_frontend * fe,int mode)48 static 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
gp8psk_fe_update_status(struct gp8psk_fe_state * st)55 static 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
gp8psk_fe_read_status(struct dvb_frontend * fe,enum fe_status * status)67 static 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 else
76 *status = 0;
77
78 if (*status & FE_HAS_LOCK)
79 st->status_check_interval = 1000;
80 else
81 st->status_check_interval = 100;
82 return 0;
83 }
84
85 /* not supported by this Frontend */
gp8psk_fe_read_ber(struct dvb_frontend * fe,u32 * ber)86 static 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 */
gp8psk_fe_read_unc_blocks(struct dvb_frontend * fe,u32 * unc)94 static int gp8psk_fe_read_unc_blocks(struct dvb_frontend* fe, u32 *unc)
95 {
96 (void) fe;
97 *unc = 0;
98 return 0;
99 }
100
gp8psk_fe_read_snr(struct dvb_frontend * fe,u16 * snr)101 static 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
gp8psk_fe_read_signal_strength(struct dvb_frontend * fe,u16 * strength)110 static 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 else
120 *strength = (st->snr << 4) + st->snr; /* snr*17 */
121 return 0;
122 }
123
gp8psk_fe_get_tune_settings(struct dvb_frontend * fe,struct dvb_frontend_tune_settings * tune)124 static 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
gp8psk_fe_set_frontend(struct dvb_frontend * fe)130 static 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 else
198 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
gp8psk_fe_send_diseqc_msg(struct dvb_frontend * fe,struct dvb_diseqc_master_cmd * m)238 static 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
gp8psk_fe_send_diseqc_burst(struct dvb_frontend * fe,enum fe_sec_mini_cmd burst)252 static 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
gp8psk_fe_set_tone(struct dvb_frontend * fe,enum fe_sec_tone_mode tone)270 static 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
gp8psk_fe_set_voltage(struct dvb_frontend * fe,enum fe_sec_voltage voltage)282 static 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
gp8psk_fe_enable_high_lnb_voltage(struct dvb_frontend * fe,long onoff)294 static 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
gp8psk_fe_send_legacy_dish_cmd(struct dvb_frontend * fe,unsigned long sw_cmd)301 static 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
gp8psk_fe_release(struct dvb_frontend * fe)316 static void gp8psk_fe_release(struct dvb_frontend* fe)
317 {
318 struct gp8psk_fe_state *st = fe->demodulator_priv;
319
320 kfree(st);
321 }
322
323 static const struct dvb_frontend_ops gp8psk_fe_ops;
324
gp8psk_fe_attach(const struct gp8psk_fe_ops * ops,void * priv,bool is_rev1)325 struct 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 }
349 EXPORT_SYMBOL_GPL(gp8psk_fe_attach);
350
351 static 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 compatibility
366 * (Myth incorrectly detects Turbo-QPSK as plain QAM-16)
367 */
368 FE_CAN_QPSK | FE_CAN_QAM_16 | FE_CAN_TURBO_FEC
369 },
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_voltage
392 };
393
394 MODULE_AUTHOR("Alan Nisota <alannisota@gamil.com>");
395 MODULE_DESCRIPTION("Frontend Driver for Genpix DVB-S");
396 MODULE_VERSION("1.1");
397 MODULE_LICENSE("GPL");
398