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
gp8psk_tuned_to_DCII(struct dvb_frontend * fe)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
gp8psk_set_tuner_mode(struct dvb_frontend * fe,int mode)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
gp8psk_fe_update_status(struct gp8psk_fe_state * st)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
gp8psk_fe_read_status(struct dvb_frontend * fe,enum fe_status * status)54 static int gp8psk_fe_read_status(struct dvb_frontend *fe,
55 enum fe_status *status)
56 {
57 struct gp8psk_fe_state *st = fe->demodulator_priv;
58 gp8psk_fe_update_status(st);
59
60 if (st->lock)
61 *status = FE_HAS_LOCK | FE_HAS_SYNC | FE_HAS_VITERBI | FE_HAS_SIGNAL | FE_HAS_CARRIER;
62 else
63 *status = 0;
64
65 if (*status & FE_HAS_LOCK)
66 st->status_check_interval = 1000;
67 else
68 st->status_check_interval = 100;
69 return 0;
70 }
71
72 /* not supported by this Frontend */
gp8psk_fe_read_ber(struct dvb_frontend * fe,u32 * ber)73 static int gp8psk_fe_read_ber(struct dvb_frontend* fe, u32 *ber)
74 {
75 (void) fe;
76 *ber = 0;
77 return 0;
78 }
79
80 /* not supported by this Frontend */
gp8psk_fe_read_unc_blocks(struct dvb_frontend * fe,u32 * unc)81 static int gp8psk_fe_read_unc_blocks(struct dvb_frontend* fe, u32 *unc)
82 {
83 (void) fe;
84 *unc = 0;
85 return 0;
86 }
87
gp8psk_fe_read_snr(struct dvb_frontend * fe,u16 * snr)88 static int gp8psk_fe_read_snr(struct dvb_frontend* fe, u16 *snr)
89 {
90 struct gp8psk_fe_state *st = fe->demodulator_priv;
91 gp8psk_fe_update_status(st);
92 /* snr is reported in dBu*256 */
93 *snr = st->snr;
94 return 0;
95 }
96
gp8psk_fe_read_signal_strength(struct dvb_frontend * fe,u16 * strength)97 static int gp8psk_fe_read_signal_strength(struct dvb_frontend* fe, u16 *strength)
98 {
99 struct gp8psk_fe_state *st = fe->demodulator_priv;
100 gp8psk_fe_update_status(st);
101 /* snr is reported in dBu*256 */
102 /* snr / 38.4 ~= 100% strength */
103 /* snr * 17 returns 100% strength as 65535 */
104 if (st->snr > 0xf00)
105 *strength = 0xffff;
106 else
107 *strength = (st->snr << 4) + st->snr; /* snr*17 */
108 return 0;
109 }
110
gp8psk_fe_get_tune_settings(struct dvb_frontend * fe,struct dvb_frontend_tune_settings * tune)111 static int gp8psk_fe_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings *tune)
112 {
113 tune->min_delay_ms = 800;
114 return 0;
115 }
116
gp8psk_fe_set_frontend(struct dvb_frontend * fe)117 static int gp8psk_fe_set_frontend(struct dvb_frontend *fe)
118 {
119 struct gp8psk_fe_state *state = fe->demodulator_priv;
120 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
121 u8 cmd[10];
122 u32 freq = c->frequency * 1000;
123 int gp_product_id = le16_to_cpu(state->d->udev->descriptor.idProduct);
124
125 deb_fe("%s()\n", __func__);
126
127 cmd[4] = freq & 0xff;
128 cmd[5] = (freq >> 8) & 0xff;
129 cmd[6] = (freq >> 16) & 0xff;
130 cmd[7] = (freq >> 24) & 0xff;
131
132 /* backwards compatibility: DVB-S + 8-PSK were used for Turbo-FEC */
133 if (c->delivery_system == SYS_DVBS && c->modulation == PSK_8)
134 c->delivery_system = SYS_TURBO;
135
136 switch (c->delivery_system) {
137 case SYS_DVBS:
138 if (c->modulation != QPSK) {
139 deb_fe("%s: unsupported modulation selected (%d)\n",
140 __func__, c->modulation);
141 return -EOPNOTSUPP;
142 }
143 c->fec_inner = FEC_AUTO;
144 break;
145 case SYS_DVBS2: /* kept for backwards compatibility */
146 deb_fe("%s: DVB-S2 delivery system selected\n", __func__);
147 break;
148 case SYS_TURBO:
149 deb_fe("%s: Turbo-FEC delivery system selected\n", __func__);
150 break;
151
152 default:
153 deb_fe("%s: unsupported delivery system selected (%d)\n",
154 __func__, c->delivery_system);
155 return -EOPNOTSUPP;
156 }
157
158 cmd[0] = c->symbol_rate & 0xff;
159 cmd[1] = (c->symbol_rate >> 8) & 0xff;
160 cmd[2] = (c->symbol_rate >> 16) & 0xff;
161 cmd[3] = (c->symbol_rate >> 24) & 0xff;
162 switch (c->modulation) {
163 case QPSK:
164 if (gp_product_id == USB_PID_GENPIX_8PSK_REV_1_WARM)
165 if (gp8psk_tuned_to_DCII(fe))
166 gp8psk_bcm4500_reload(state->d);
167 switch (c->fec_inner) {
168 case FEC_1_2:
169 cmd[9] = 0; break;
170 case FEC_2_3:
171 cmd[9] = 1; break;
172 case FEC_3_4:
173 cmd[9] = 2; break;
174 case FEC_5_6:
175 cmd[9] = 3; break;
176 case FEC_7_8:
177 cmd[9] = 4; break;
178 case FEC_AUTO:
179 cmd[9] = 5; break;
180 default:
181 cmd[9] = 5; break;
182 }
183 if (c->delivery_system == SYS_TURBO)
184 cmd[8] = ADV_MOD_TURBO_QPSK;
185 else
186 cmd[8] = ADV_MOD_DVB_QPSK;
187 break;
188 case PSK_8: /* PSK_8 is for compatibility with DN */
189 cmd[8] = ADV_MOD_TURBO_8PSK;
190 switch (c->fec_inner) {
191 case FEC_2_3:
192 cmd[9] = 0; break;
193 case FEC_3_4:
194 cmd[9] = 1; break;
195 case FEC_3_5:
196 cmd[9] = 2; break;
197 case FEC_5_6:
198 cmd[9] = 3; break;
199 case FEC_8_9:
200 cmd[9] = 4; break;
201 default:
202 cmd[9] = 0; break;
203 }
204 break;
205 case QAM_16: /* QAM_16 is for compatibility with DN */
206 cmd[8] = ADV_MOD_TURBO_16QAM;
207 cmd[9] = 0;
208 break;
209 default: /* Unknown modulation */
210 deb_fe("%s: unsupported modulation selected (%d)\n",
211 __func__, c->modulation);
212 return -EOPNOTSUPP;
213 }
214
215 if (gp_product_id == USB_PID_GENPIX_8PSK_REV_1_WARM)
216 gp8psk_set_tuner_mode(fe, 0);
217 gp8psk_usb_out_op(state->d, TUNE_8PSK, 0, 0, cmd, 10);
218
219 state->lock = 0;
220 state->next_status_check = jiffies;
221 state->status_check_interval = 200;
222
223 return 0;
224 }
225
gp8psk_fe_send_diseqc_msg(struct dvb_frontend * fe,struct dvb_diseqc_master_cmd * m)226 static int gp8psk_fe_send_diseqc_msg (struct dvb_frontend* fe,
227 struct dvb_diseqc_master_cmd *m)
228 {
229 struct gp8psk_fe_state *st = fe->demodulator_priv;
230
231 deb_fe("%s\n",__func__);
232
233 if (gp8psk_usb_out_op(st->d,SEND_DISEQC_COMMAND, m->msg[0], 0,
234 m->msg, m->msg_len)) {
235 return -EINVAL;
236 }
237 return 0;
238 }
239
gp8psk_fe_send_diseqc_burst(struct dvb_frontend * fe,enum fe_sec_mini_cmd burst)240 static int gp8psk_fe_send_diseqc_burst(struct dvb_frontend *fe,
241 enum fe_sec_mini_cmd burst)
242 {
243 struct gp8psk_fe_state *st = fe->demodulator_priv;
244 u8 cmd;
245
246 deb_fe("%s\n",__func__);
247
248 /* These commands are certainly wrong */
249 cmd = (burst == SEC_MINI_A) ? 0x00 : 0x01;
250
251 if (gp8psk_usb_out_op(st->d,SEND_DISEQC_COMMAND, cmd, 0,
252 &cmd, 0)) {
253 return -EINVAL;
254 }
255 return 0;
256 }
257
gp8psk_fe_set_tone(struct dvb_frontend * fe,enum fe_sec_tone_mode tone)258 static int gp8psk_fe_set_tone(struct dvb_frontend *fe,
259 enum fe_sec_tone_mode tone)
260 {
261 struct gp8psk_fe_state* state = fe->demodulator_priv;
262
263 if (gp8psk_usb_out_op(state->d,SET_22KHZ_TONE,
264 (tone == SEC_TONE_ON), 0, NULL, 0)) {
265 return -EINVAL;
266 }
267 return 0;
268 }
269
gp8psk_fe_set_voltage(struct dvb_frontend * fe,enum fe_sec_voltage voltage)270 static int gp8psk_fe_set_voltage(struct dvb_frontend *fe,
271 enum fe_sec_voltage voltage)
272 {
273 struct gp8psk_fe_state* state = fe->demodulator_priv;
274
275 if (gp8psk_usb_out_op(state->d,SET_LNB_VOLTAGE,
276 voltage == SEC_VOLTAGE_18, 0, NULL, 0)) {
277 return -EINVAL;
278 }
279 return 0;
280 }
281
gp8psk_fe_enable_high_lnb_voltage(struct dvb_frontend * fe,long onoff)282 static int gp8psk_fe_enable_high_lnb_voltage(struct dvb_frontend* fe, long onoff)
283 {
284 struct gp8psk_fe_state* state = fe->demodulator_priv;
285 return gp8psk_usb_out_op(state->d, USE_EXTRA_VOLT, onoff, 0,NULL,0);
286 }
287
gp8psk_fe_send_legacy_dish_cmd(struct dvb_frontend * fe,unsigned long sw_cmd)288 static int gp8psk_fe_send_legacy_dish_cmd (struct dvb_frontend* fe, unsigned long sw_cmd)
289 {
290 struct gp8psk_fe_state* state = fe->demodulator_priv;
291 u8 cmd = sw_cmd & 0x7f;
292
293 if (gp8psk_usb_out_op(state->d,SET_DN_SWITCH, cmd, 0,
294 NULL, 0)) {
295 return -EINVAL;
296 }
297 if (gp8psk_usb_out_op(state->d,SET_LNB_VOLTAGE, !!(sw_cmd & 0x80),
298 0, NULL, 0)) {
299 return -EINVAL;
300 }
301
302 return 0;
303 }
304
gp8psk_fe_release(struct dvb_frontend * fe)305 static void gp8psk_fe_release(struct dvb_frontend* fe)
306 {
307 struct gp8psk_fe_state *state = fe->demodulator_priv;
308 kfree(state);
309 }
310
311 static struct dvb_frontend_ops gp8psk_fe_ops;
312
gp8psk_fe_attach(struct dvb_usb_device * d)313 struct dvb_frontend * gp8psk_fe_attach(struct dvb_usb_device *d)
314 {
315 struct gp8psk_fe_state *s = kzalloc(sizeof(struct gp8psk_fe_state), GFP_KERNEL);
316 if (s == NULL)
317 goto error;
318
319 s->d = d;
320 memcpy(&s->fe.ops, &gp8psk_fe_ops, sizeof(struct dvb_frontend_ops));
321 s->fe.demodulator_priv = s;
322
323 goto success;
324 error:
325 return NULL;
326 success:
327 return &s->fe;
328 }
329
330
331 static struct dvb_frontend_ops gp8psk_fe_ops = {
332 .delsys = { SYS_DVBS },
333 .info = {
334 .name = "Genpix DVB-S",
335 .frequency_min = 800000,
336 .frequency_max = 2250000,
337 .frequency_stepsize = 100,
338 .symbol_rate_min = 1000000,
339 .symbol_rate_max = 45000000,
340 .symbol_rate_tolerance = 500, /* ppm */
341 .caps = FE_CAN_INVERSION_AUTO |
342 FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
343 FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
344 /*
345 * FE_CAN_QAM_16 is for compatibility
346 * (Myth incorrectly detects Turbo-QPSK as plain QAM-16)
347 */
348 FE_CAN_QPSK | FE_CAN_QAM_16 | FE_CAN_TURBO_FEC
349 },
350
351 .release = gp8psk_fe_release,
352
353 .init = NULL,
354 .sleep = NULL,
355
356 .set_frontend = gp8psk_fe_set_frontend,
357
358 .get_tune_settings = gp8psk_fe_get_tune_settings,
359
360 .read_status = gp8psk_fe_read_status,
361 .read_ber = gp8psk_fe_read_ber,
362 .read_signal_strength = gp8psk_fe_read_signal_strength,
363 .read_snr = gp8psk_fe_read_snr,
364 .read_ucblocks = gp8psk_fe_read_unc_blocks,
365
366 .diseqc_send_master_cmd = gp8psk_fe_send_diseqc_msg,
367 .diseqc_send_burst = gp8psk_fe_send_diseqc_burst,
368 .set_tone = gp8psk_fe_set_tone,
369 .set_voltage = gp8psk_fe_set_voltage,
370 .dishnetwork_send_legacy_command = gp8psk_fe_send_legacy_dish_cmd,
371 .enable_high_lnb_voltage = gp8psk_fe_enable_high_lnb_voltage
372 };
373