1/* DVB frontend part of the Linux driver for the TwinhanDTV StarBox USB2.0
2 * DVB-S receiver.
3 *
4 * Copyright (C) 2005 Ralph Metzler <rjkm@metzlerbros.de>
5 *                    Metzler Brothers Systementwicklung GbR
6 *
7 * Copyright (C) 2005 Patrick Boettcher <patrick.boettcher@desy.de>
8 *
9 * Thanks to Twinhan who kindly provided hardware and information.
10 *
11 * This file can be removed soon, after the DST-driver is rewritten to provice
12 * the frontend-controlling separately.
13 *
14 *	This program is free software; you can redistribute it and/or modify it
15 *	under the terms of the GNU General Public License as published by the Free
16 *	Software Foundation, version 2.
17 *
18 * see Documentation/dvb/README.dvb-usb for more information
19 *
20 */
21#include "vp702x.h"
22
23struct vp702x_fe_state {
24	struct dvb_frontend fe;
25	struct dvb_usb_device *d;
26
27	struct dvb_frontend_ops ops;
28
29	fe_sec_voltage_t voltage;
30	fe_sec_tone_mode_t tone_mode;
31
32	u8 lnb_buf[8];
33
34	u8 lock;
35	u8 sig;
36	u8 snr;
37
38	unsigned long next_status_check;
39	unsigned long status_check_interval;
40};
41
42static int vp702x_fe_refresh_state(struct vp702x_fe_state *st)
43{
44	u8 buf[10];
45	if (time_after(jiffies,st->next_status_check)) {
46		vp702x_usb_in_op(st->d,READ_STATUS,0,0,buf,10);
47
48		st->lock = buf[4];
49		vp702x_usb_in_op(st->d,READ_TUNER_REG_REQ,0x11,0,&st->snr,1);
50		vp702x_usb_in_op(st->d,READ_TUNER_REG_REQ,0x15,0,&st->sig,1);
51
52		st->next_status_check = jiffies + (st->status_check_interval*HZ)/1000;
53	}
54	return 0;
55}
56
57static u8 vp702x_chksum(u8 *buf,int f, int count)
58{
59	u8 s = 0;
60	int i;
61	for (i = f; i < f+count; i++)
62		s += buf[i];
63	return ~s+1;
64}
65
66static int vp702x_fe_read_status(struct dvb_frontend* fe, fe_status_t *status)
67{
68	struct vp702x_fe_state *st = fe->demodulator_priv;
69	vp702x_fe_refresh_state(st);
70	deb_fe("%s\n",__FUNCTION__);
71
72	if (st->lock == 0)
73		*status = FE_HAS_LOCK | FE_HAS_SYNC | FE_HAS_VITERBI | FE_HAS_SIGNAL | FE_HAS_CARRIER;
74	else
75		*status = 0;
76
77	if (*status & FE_HAS_LOCK)
78		st->status_check_interval = 1000;
79	else
80		st->status_check_interval = 250;
81	return 0;
82}
83
84/* not supported by this Frontend */
85static int vp702x_fe_read_ber(struct dvb_frontend* fe, u32 *ber)
86{
87	struct vp702x_fe_state *st = fe->demodulator_priv;
88	vp702x_fe_refresh_state(st);
89	*ber = 0;
90	return 0;
91}
92
93/* not supported by this Frontend */
94static int vp702x_fe_read_unc_blocks(struct dvb_frontend* fe, u32 *unc)
95{
96	struct vp702x_fe_state *st = fe->demodulator_priv;
97	vp702x_fe_refresh_state(st);
98	*unc = 0;
99	return 0;
100}
101
102static int vp702x_fe_read_signal_strength(struct dvb_frontend* fe, u16 *strength)
103{
104	struct vp702x_fe_state *st = fe->demodulator_priv;
105	vp702x_fe_refresh_state(st);
106
107	*strength = (st->sig << 8) | st->sig;
108	return 0;
109}
110
111static int vp702x_fe_read_snr(struct dvb_frontend* fe, u16 *snr)
112{
113	u8 _snr;
114	struct vp702x_fe_state *st = fe->demodulator_priv;
115	vp702x_fe_refresh_state(st);
116
117	_snr = (st->snr & 0x1f) * 0xff / 0x1f;
118	*snr = (_snr << 8) | _snr;
119	return 0;
120}
121
122static int vp702x_fe_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings *tune)
123{
124	deb_fe("%s\n",__FUNCTION__);
125	tune->min_delay_ms = 2000;
126	return 0;
127}
128
129static int vp702x_fe_set_frontend(struct dvb_frontend* fe,
130				  struct dvb_frontend_parameters *fep)
131{
132	struct vp702x_fe_state *st = fe->demodulator_priv;
133	u32 freq = fep->frequency/1000;
134	/*CalFrequency*/
135/*	u16 frequencyRef[16] = { 2, 4, 8, 16, 32, 64, 128, 256, 24, 5, 10, 20, 40, 80, 160, 320 }; */
136	u64 sr;
137	u8 cmd[8] = { 0 },ibuf[10];
138
139	cmd[0] = (freq >> 8) & 0x7f;
140	cmd[1] =  freq       & 0xff;
141	cmd[2] = 1; /* divrate == 4 -> frequencyRef[1] -> 1 here */
142
143	sr = (u64) (fep->u.qpsk.symbol_rate/1000) << 20;
144	do_div(sr,88000);
145	cmd[3] = (sr >> 12) & 0xff;
146	cmd[4] = (sr >> 4)  & 0xff;
147	cmd[5] = (sr << 4)  & 0xf0;
148
149	deb_fe("setting frontend to: %u -> %u (%x) LNB-based GHz, symbolrate: %d -> %lu (%lx)\n",
150			fep->frequency,freq,freq, fep->u.qpsk.symbol_rate,
151			(unsigned long) sr, (unsigned long) sr);
152
153/*	if (fep->inversion == INVERSION_ON)
154		cmd[6] |= 0x80; */
155
156	if (st->voltage == SEC_VOLTAGE_18)
157		cmd[6] |= 0x40;
158
159/*	if (fep->u.qpsk.symbol_rate > 8000000)
160		cmd[6] |= 0x20;
161
162	if (fep->frequency < 1531000)
163		cmd[6] |= 0x04;
164
165	if (st->tone_mode == SEC_TONE_ON)
166		cmd[6] |= 0x01;*/
167
168	cmd[7] = vp702x_chksum(cmd,0,7);
169
170	st->status_check_interval = 250;
171	st->next_status_check = jiffies;
172
173	vp702x_usb_inout_op(st->d,cmd,8,ibuf,10,100);
174
175	if (ibuf[2] == 0 && ibuf[3] == 0)
176		deb_fe("tuning failed.\n");
177	else
178		deb_fe("tuning succeeded.\n");
179
180	return 0;
181}
182
183static int vp702x_fe_init(struct dvb_frontend *fe)
184{
185	struct vp702x_fe_state *st = fe->demodulator_priv;
186	deb_fe("%s\n",__FUNCTION__);
187	vp702x_usb_in_op(st->d, RESET_TUNER, 0, 0, NULL, 0);
188	return 0;
189}
190
191static int vp702x_fe_sleep(struct dvb_frontend *fe)
192{
193	deb_fe("%s\n",__FUNCTION__);
194	return 0;
195}
196
197static int vp702x_fe_get_frontend(struct dvb_frontend* fe,
198				  struct dvb_frontend_parameters *fep)
199{
200	deb_fe("%s\n",__FUNCTION__);
201	return 0;
202}
203
204static int vp702x_fe_send_diseqc_msg (struct dvb_frontend* fe,
205				    struct dvb_diseqc_master_cmd *m)
206{
207	struct vp702x_fe_state *st = fe->demodulator_priv;
208	u8 cmd[8],ibuf[10];
209	memset(cmd,0,8);
210
211	deb_fe("%s\n",__FUNCTION__);
212
213	if (m->msg_len > 4)
214		return -EINVAL;
215
216	cmd[1] = SET_DISEQC_CMD;
217	cmd[2] = m->msg_len;
218	memcpy(&cmd[3], m->msg, m->msg_len);
219	cmd[7] = vp702x_chksum(cmd,0,7);
220
221	vp702x_usb_inout_op(st->d,cmd,8,ibuf,10,100);
222
223	if (ibuf[2] == 0 && ibuf[3] == 0)
224		deb_fe("diseqc cmd failed.\n");
225	else
226		deb_fe("diseqc cmd succeeded.\n");
227
228	return 0;
229}
230
231static int vp702x_fe_send_diseqc_burst (struct dvb_frontend* fe, fe_sec_mini_cmd_t burst)
232{
233	deb_fe("%s\n",__FUNCTION__);
234	return 0;
235}
236
237static int vp702x_fe_set_tone(struct dvb_frontend* fe, fe_sec_tone_mode_t tone)
238{
239	struct vp702x_fe_state *st = fe->demodulator_priv;
240	u8 ibuf[10];
241	deb_fe("%s\n",__FUNCTION__);
242
243	st->tone_mode = tone;
244
245	if (tone == SEC_TONE_ON)
246		st->lnb_buf[2] = 0x02;
247	else
248		st->lnb_buf[2] = 0x00;
249
250	st->lnb_buf[7] = vp702x_chksum(st->lnb_buf,0,7);
251
252	vp702x_usb_inout_op(st->d,st->lnb_buf,8,ibuf,10,100);
253	if (ibuf[2] == 0 && ibuf[3] == 0)
254		deb_fe("set_tone cmd failed.\n");
255	else
256		deb_fe("set_tone cmd succeeded.\n");
257
258	return 0;
259}
260
261static int vp702x_fe_set_voltage (struct dvb_frontend* fe, fe_sec_voltage_t
262		voltage)
263{
264	struct vp702x_fe_state *st = fe->demodulator_priv;
265	u8 ibuf[10];
266	deb_fe("%s\n",__FUNCTION__);
267
268	st->voltage = voltage;
269
270	if (voltage != SEC_VOLTAGE_OFF)
271		st->lnb_buf[4] = 0x01;
272	else
273		st->lnb_buf[4] = 0x00;
274
275	st->lnb_buf[7] = vp702x_chksum(st->lnb_buf,0,7);
276
277	vp702x_usb_inout_op(st->d,st->lnb_buf,8,ibuf,10,100);
278	if (ibuf[2] == 0 && ibuf[3] == 0)
279		deb_fe("set_voltage cmd failed.\n");
280	else
281		deb_fe("set_voltage cmd succeeded.\n");
282
283	return 0;
284}
285
286static void vp702x_fe_release(struct dvb_frontend* fe)
287{
288	struct vp702x_fe_state *st = fe->demodulator_priv;
289	kfree(st);
290}
291
292static struct dvb_frontend_ops vp702x_fe_ops;
293
294struct dvb_frontend * vp702x_fe_attach(struct dvb_usb_device *d)
295{
296	struct vp702x_fe_state *s = kzalloc(sizeof(struct vp702x_fe_state), GFP_KERNEL);
297	if (s == NULL)
298		goto error;
299
300	s->d = d;
301
302	memcpy(&s->fe.ops,&vp702x_fe_ops,sizeof(struct dvb_frontend_ops));
303	s->fe.demodulator_priv = s;
304
305	s->lnb_buf[1] = SET_LNB_POWER;
306	s->lnb_buf[3] = 0xff; /* 0=tone burst, 2=data burst, ff=off */
307
308	return &s->fe;
309error:
310	return NULL;
311}
312
313
314static struct dvb_frontend_ops vp702x_fe_ops = {
315	.info = {
316		.name           = "Twinhan DST-like frontend (VP7021/VP7020) DVB-S",
317		.type           = FE_QPSK,
318		.frequency_min       = 950000,
319		.frequency_max       = 2150000,
320		.frequency_stepsize  = 1000,   /* kHz for QPSK frontends */
321		.frequency_tolerance = 0,
322		.symbol_rate_min     = 1000000,
323		.symbol_rate_max     = 45000000,
324		.symbol_rate_tolerance = 500,  /* ppm */
325		.caps = FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
326		FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 |
327		FE_CAN_QPSK |
328		FE_CAN_FEC_AUTO
329	},
330	.release = vp702x_fe_release,
331
332	.init  = vp702x_fe_init,
333	.sleep = vp702x_fe_sleep,
334
335	.set_frontend = vp702x_fe_set_frontend,
336	.get_frontend = vp702x_fe_get_frontend,
337	.get_tune_settings = vp702x_fe_get_tune_settings,
338
339	.read_status = vp702x_fe_read_status,
340	.read_ber = vp702x_fe_read_ber,
341	.read_signal_strength = vp702x_fe_read_signal_strength,
342	.read_snr = vp702x_fe_read_snr,
343	.read_ucblocks = vp702x_fe_read_unc_blocks,
344
345	.diseqc_send_master_cmd = vp702x_fe_send_diseqc_msg,
346	.diseqc_send_burst = vp702x_fe_send_diseqc_burst,
347	.set_tone = vp702x_fe_set_tone,
348	.set_voltage = vp702x_fe_set_voltage,
349};
350