1/* DVB USB compliant Linux driver for the
2 *  - GENPIX 8pks/qpsk USB2.0 DVB-S module
3 *
4 * Copyright (C) 2006 Alan Nisota (alannisota@gmail.com)
5 *
6 * Thanks to GENPIX for the sample code used to implement this module.
7 *
8 * This module is based off the vp7045 and vp702x modules
9 *
10 *	This program is free software; you can redistribute it and/or modify it
11 *	under the terms of the GNU General Public License as published by the Free
12 *	Software Foundation, version 2.
13 *
14 * see Documentation/dvb/README.dvb-usb for more information
15 */
16#include "gp8psk.h"
17
18struct gp8psk_fe_state {
19	struct dvb_frontend fe;
20
21	struct dvb_usb_device *d;
22
23	u16 snr;
24
25	unsigned long next_snr_check;
26};
27
28static int gp8psk_fe_read_status(struct dvb_frontend* fe, fe_status_t *status)
29{
30	struct gp8psk_fe_state *st = fe->demodulator_priv;
31	u8 lock;
32
33	if (gp8psk_usb_in_op(st->d, GET_SIGNAL_LOCK, 0, 0, &lock,1))
34		return -EINVAL;
35
36	if (lock)
37		*status = FE_HAS_LOCK | FE_HAS_SYNC | FE_HAS_VITERBI | FE_HAS_SIGNAL | FE_HAS_CARRIER;
38	else
39		*status = 0;
40
41	return 0;
42}
43
44/* not supported by this Frontend */
45static int gp8psk_fe_read_ber(struct dvb_frontend* fe, u32 *ber)
46{
47	(void) fe;
48	*ber = 0;
49	return 0;
50}
51
52/* not supported by this Frontend */
53static int gp8psk_fe_read_unc_blocks(struct dvb_frontend* fe, u32 *unc)
54{
55	(void) fe;
56	*unc = 0;
57	return 0;
58}
59
60static int gp8psk_fe_read_snr(struct dvb_frontend* fe, u16 *snr)
61{
62	struct gp8psk_fe_state *st = fe->demodulator_priv;
63	u8 buf[2];
64
65	if (time_after(jiffies,st->next_snr_check)) {
66		gp8psk_usb_in_op(st->d,GET_SIGNAL_STRENGTH,0,0,buf,2);
67		*snr = (int)(buf[1]) << 8 | buf[0];
68		/* snr is reported in dBu*256 */
69		/* snr / 38.4 ~= 100% strength */
70		/* snr * 17 returns 100% strength as 65535 */
71		if (*snr <= 3855)
72			*snr = (*snr<<4) + *snr; // snr * 17
73		else
74			*snr = 65535;
75		st->next_snr_check = jiffies + (10*HZ)/1000;
76	} else {
77		*snr = st->snr;
78	}
79	return 0;
80}
81
82static int gp8psk_fe_read_signal_strength(struct dvb_frontend* fe, u16 *strength)
83{
84	return gp8psk_fe_read_snr(fe, strength);
85}
86
87static int gp8psk_fe_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings *tune)
88{
89	tune->min_delay_ms = 800;
90	return 0;
91}
92
93static int gp8psk_fe_set_frontend(struct dvb_frontend* fe,
94				  struct dvb_frontend_parameters *fep)
95{
96	struct gp8psk_fe_state *state = fe->demodulator_priv;
97	u8 cmd[10];
98	u32 freq = fep->frequency * 1000;
99
100	cmd[4] = freq         & 0xff;
101	cmd[5] = (freq >> 8)  & 0xff;
102	cmd[6] = (freq >> 16) & 0xff;
103	cmd[7] = (freq >> 24) & 0xff;
104
105	switch(fe->ops.info.type) {
106	case FE_QPSK:
107		cmd[0] =  fep->u.qpsk.symbol_rate        & 0xff;
108		cmd[1] = (fep->u.qpsk.symbol_rate >>  8) & 0xff;
109		cmd[2] = (fep->u.qpsk.symbol_rate >> 16) & 0xff;
110		cmd[3] = (fep->u.qpsk.symbol_rate >> 24) & 0xff;
111		cmd[8] = ADV_MOD_DVB_QPSK;
112		cmd[9] = 0x03; /*ADV_MOD_FEC_XXX*/
113		break;
114	default:
115		// other modes are unsuported right now
116		cmd[0] = 0;
117		cmd[1] = 0;
118		cmd[2] = 0;
119		cmd[3] = 0;
120		cmd[8] = 0;
121		cmd[9] = 0;
122		break;
123	}
124
125	gp8psk_usb_out_op(state->d,TUNE_8PSK,0,0,cmd,10);
126
127	state->next_snr_check = jiffies;
128
129	return 0;
130}
131
132static int gp8psk_fe_get_frontend(struct dvb_frontend* fe,
133				  struct dvb_frontend_parameters *fep)
134{
135	return 0;
136}
137
138
139static int gp8psk_fe_send_diseqc_msg (struct dvb_frontend* fe,
140				    struct dvb_diseqc_master_cmd *m)
141{
142	struct gp8psk_fe_state *st = fe->demodulator_priv;
143
144	deb_fe("%s\n",__FUNCTION__);
145
146	if (gp8psk_usb_out_op(st->d,SEND_DISEQC_COMMAND, m->msg[0], 0,
147			m->msg, m->msg_len)) {
148		return -EINVAL;
149	}
150	return 0;
151}
152
153static int gp8psk_fe_send_diseqc_burst (struct dvb_frontend* fe,
154				    fe_sec_mini_cmd_t burst)
155{
156	struct gp8psk_fe_state *st = fe->demodulator_priv;
157	u8 cmd;
158
159	deb_fe("%s\n",__FUNCTION__);
160
161	/* These commands are certainly wrong */
162	cmd = (burst == SEC_MINI_A) ? 0x00 : 0x01;
163
164	if (gp8psk_usb_out_op(st->d,SEND_DISEQC_COMMAND, cmd, 0,
165			&cmd, 0)) {
166		return -EINVAL;
167	}
168	return 0;
169}
170
171static int gp8psk_fe_set_tone (struct dvb_frontend* fe, fe_sec_tone_mode_t tone)
172{
173	struct gp8psk_fe_state* state = fe->demodulator_priv;
174
175	if (gp8psk_usb_out_op(state->d,SET_22KHZ_TONE,
176		 (tone == SEC_TONE_ON), 0, NULL, 0)) {
177		return -EINVAL;
178	}
179	return 0;
180}
181
182static int gp8psk_fe_set_voltage (struct dvb_frontend* fe, fe_sec_voltage_t voltage)
183{
184	struct gp8psk_fe_state* state = fe->demodulator_priv;
185
186	if (gp8psk_usb_out_op(state->d,SET_LNB_VOLTAGE,
187			 voltage == SEC_VOLTAGE_18, 0, NULL, 0)) {
188		return -EINVAL;
189	}
190	return 0;
191}
192
193static int gp8psk_fe_send_legacy_dish_cmd (struct dvb_frontend* fe, unsigned long sw_cmd)
194{
195	struct gp8psk_fe_state* state = fe->demodulator_priv;
196	u8 cmd = sw_cmd & 0x7f;
197
198	if (gp8psk_usb_out_op(state->d,SET_DN_SWITCH, cmd, 0,
199			NULL, 0)) {
200		return -EINVAL;
201	}
202	if (gp8psk_usb_out_op(state->d,SET_LNB_VOLTAGE, !!(sw_cmd & 0x80),
203			0, NULL, 0)) {
204		return -EINVAL;
205	}
206
207	return 0;
208}
209
210static void gp8psk_fe_release(struct dvb_frontend* fe)
211{
212	struct gp8psk_fe_state *state = fe->demodulator_priv;
213	kfree(state);
214}
215
216static struct dvb_frontend_ops gp8psk_fe_ops;
217
218struct dvb_frontend * gp8psk_fe_attach(struct dvb_usb_device *d)
219{
220	struct gp8psk_fe_state *s = kzalloc(sizeof(struct gp8psk_fe_state), GFP_KERNEL);
221	if (s == NULL)
222		goto error;
223
224	s->d = d;
225	memcpy(&s->fe.ops, &gp8psk_fe_ops, sizeof(struct dvb_frontend_ops));
226	s->fe.demodulator_priv = s;
227
228	goto success;
229error:
230	return NULL;
231success:
232	return &s->fe;
233}
234
235
236static struct dvb_frontend_ops gp8psk_fe_ops = {
237	.info = {
238		.name			= "Genpix 8psk-USB DVB-S",
239		.type			= FE_QPSK,
240		.frequency_min		= 950000,
241		.frequency_max		= 2150000,
242		.frequency_stepsize	= 100,
243		.symbol_rate_min        = 1000000,
244		.symbol_rate_max        = 45000000,
245		.symbol_rate_tolerance  = 500,  /* ppm */
246		.caps = FE_CAN_INVERSION_AUTO |
247				FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
248				FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
249				FE_CAN_QPSK
250	},
251
252	.release = gp8psk_fe_release,
253
254	.init = NULL,
255	.sleep = NULL,
256
257	.set_frontend = gp8psk_fe_set_frontend,
258	.get_frontend = gp8psk_fe_get_frontend,
259	.get_tune_settings = gp8psk_fe_get_tune_settings,
260
261	.read_status = gp8psk_fe_read_status,
262	.read_ber = gp8psk_fe_read_ber,
263	.read_signal_strength = gp8psk_fe_read_signal_strength,
264	.read_snr = gp8psk_fe_read_snr,
265	.read_ucblocks = gp8psk_fe_read_unc_blocks,
266
267	.diseqc_send_master_cmd = gp8psk_fe_send_diseqc_msg,
268	.diseqc_send_burst = gp8psk_fe_send_diseqc_burst,
269	.set_tone = gp8psk_fe_set_tone,
270	.set_voltage = gp8psk_fe_set_voltage,
271	.dishnetwork_send_legacy_command = gp8psk_fe_send_legacy_dish_cmd,
272};
273