1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  * FireDTV driver (formerly known as FireSAT)
4  *
5  * Copyright (C) 2004 Andreas Monitzer <andy@monitzer.com>
6  * Copyright (C) 2008 Henrik Kurelid <henrik@kurelid.se>
7  */
8 
9 #include <linux/device.h>
10 #include <linux/errno.h>
11 #include <linux/kernel.h>
12 #include <linux/string.h>
13 #include <linux/types.h>
14 
15 #include <media/dvb_frontend.h>
16 
17 #include "firedtv.h"
18 
19 static int fdtv_dvb_init(struct dvb_frontend *fe)
20 {
21 	struct firedtv *fdtv = fe->sec_priv;
22 	int err;
23 
24 	/* FIXME - allocate free channel at IRM */
25 	fdtv->isochannel = fdtv->adapter.num;
26 
27 	err = cmp_establish_pp_connection(fdtv, fdtv->subunit,
28 					  fdtv->isochannel);
29 	if (err) {
30 		dev_err(fdtv->device,
31 			"could not establish point to point connection\n");
32 		return err;
33 	}
34 
35 	return fdtv_start_iso(fdtv);
36 }
37 
38 static int fdtv_sleep(struct dvb_frontend *fe)
39 {
40 	struct firedtv *fdtv = fe->sec_priv;
41 
42 	fdtv_stop_iso(fdtv);
43 	cmp_break_pp_connection(fdtv, fdtv->subunit, fdtv->isochannel);
44 	fdtv->isochannel = -1;
45 	return 0;
46 }
47 
48 #define LNBCONTROL_DONTCARE 0xff
49 
50 static int fdtv_diseqc_send_master_cmd(struct dvb_frontend *fe,
51 				       struct dvb_diseqc_master_cmd *cmd)
52 {
53 	struct firedtv *fdtv = fe->sec_priv;
54 
55 	return avc_lnb_control(fdtv, LNBCONTROL_DONTCARE, LNBCONTROL_DONTCARE,
56 			       LNBCONTROL_DONTCARE, 1, cmd);
57 }
58 
59 static int fdtv_diseqc_send_burst(struct dvb_frontend *fe,
60 				  enum fe_sec_mini_cmd minicmd)
61 {
62 	return 0;
63 }
64 
65 static int fdtv_set_tone(struct dvb_frontend *fe, enum fe_sec_tone_mode tone)
66 {
67 	struct firedtv *fdtv = fe->sec_priv;
68 
69 	fdtv->tone = tone;
70 	return 0;
71 }
72 
73 static int fdtv_set_voltage(struct dvb_frontend *fe,
74 			    enum fe_sec_voltage voltage)
75 {
76 	struct firedtv *fdtv = fe->sec_priv;
77 
78 	fdtv->voltage = voltage;
79 	return 0;
80 }
81 
82 static int fdtv_read_status(struct dvb_frontend *fe, enum fe_status *status)
83 {
84 	struct firedtv *fdtv = fe->sec_priv;
85 	struct firedtv_tuner_status stat;
86 
87 	if (avc_tuner_status(fdtv, &stat))
88 		return -EINVAL;
89 
90 	if (stat.no_rf)
91 		*status = 0;
92 	else
93 		*status = FE_HAS_SIGNAL | FE_HAS_VITERBI | FE_HAS_SYNC |
94 			  FE_HAS_CARRIER | FE_HAS_LOCK;
95 	return 0;
96 }
97 
98 static int fdtv_read_ber(struct dvb_frontend *fe, u32 *ber)
99 {
100 	struct firedtv *fdtv = fe->sec_priv;
101 	struct firedtv_tuner_status stat;
102 
103 	if (avc_tuner_status(fdtv, &stat))
104 		return -EINVAL;
105 
106 	*ber = stat.ber;
107 	return 0;
108 }
109 
110 static int fdtv_read_signal_strength(struct dvb_frontend *fe, u16 *strength)
111 {
112 	struct firedtv *fdtv = fe->sec_priv;
113 	struct firedtv_tuner_status stat;
114 
115 	if (avc_tuner_status(fdtv, &stat))
116 		return -EINVAL;
117 
118 	*strength = stat.signal_strength << 8;
119 	return 0;
120 }
121 
122 static int fdtv_read_snr(struct dvb_frontend *fe, u16 *snr)
123 {
124 	struct firedtv *fdtv = fe->sec_priv;
125 	struct firedtv_tuner_status stat;
126 
127 	if (avc_tuner_status(fdtv, &stat))
128 		return -EINVAL;
129 
130 	/* C/N[dB] = -10 * log10(snr / 65535) */
131 	*snr = stat.carrier_noise_ratio * 257;
132 	return 0;
133 }
134 
135 static int fdtv_read_uncorrected_blocks(struct dvb_frontend *fe, u32 *ucblocks)
136 {
137 	return -EOPNOTSUPP;
138 }
139 
140 static int fdtv_set_frontend(struct dvb_frontend *fe)
141 {
142 	struct dtv_frontend_properties *p = &fe->dtv_property_cache;
143 	struct firedtv *fdtv = fe->sec_priv;
144 
145 	return avc_tuner_dsd(fdtv, p);
146 }
147 
148 void fdtv_frontend_init(struct firedtv *fdtv, const char *name)
149 {
150 	struct dvb_frontend_ops *ops = &fdtv->fe.ops;
151 	struct dvb_frontend_internal_info *fi = &ops->info;
152 
153 	ops->init			= fdtv_dvb_init;
154 	ops->sleep			= fdtv_sleep;
155 
156 	ops->set_frontend		= fdtv_set_frontend;
157 
158 	ops->read_status		= fdtv_read_status;
159 	ops->read_ber			= fdtv_read_ber;
160 	ops->read_signal_strength	= fdtv_read_signal_strength;
161 	ops->read_snr			= fdtv_read_snr;
162 	ops->read_ucblocks		= fdtv_read_uncorrected_blocks;
163 
164 	ops->diseqc_send_master_cmd	= fdtv_diseqc_send_master_cmd;
165 	ops->diseqc_send_burst		= fdtv_diseqc_send_burst;
166 	ops->set_tone			= fdtv_set_tone;
167 	ops->set_voltage		= fdtv_set_voltage;
168 
169 	switch (fdtv->type) {
170 	case FIREDTV_DVB_S:
171 		ops->delsys[0]		= SYS_DVBS;
172 
173 		fi->frequency_min_hz	=   950 * MHz;
174 		fi->frequency_max_hz	=  2150 * MHz;
175 		fi->frequency_stepsize_hz = 125 * kHz;
176 		fi->symbol_rate_min	= 1000000;
177 		fi->symbol_rate_max	= 40000000;
178 
179 		fi->caps		= FE_CAN_INVERSION_AUTO |
180 					  FE_CAN_FEC_1_2	|
181 					  FE_CAN_FEC_2_3	|
182 					  FE_CAN_FEC_3_4	|
183 					  FE_CAN_FEC_5_6	|
184 					  FE_CAN_FEC_7_8	|
185 					  FE_CAN_FEC_AUTO	|
186 					  FE_CAN_QPSK;
187 		break;
188 
189 	case FIREDTV_DVB_S2:
190 		ops->delsys[0]		= SYS_DVBS;
191 		ops->delsys[1]		= SYS_DVBS2;
192 
193 		fi->frequency_min_hz	=   950 * MHz;
194 		fi->frequency_max_hz	=  2150 * MHz;
195 		fi->frequency_stepsize_hz = 125 * kHz;
196 		fi->symbol_rate_min	= 1000000;
197 		fi->symbol_rate_max	= 40000000;
198 
199 		fi->caps		= FE_CAN_INVERSION_AUTO |
200 					  FE_CAN_FEC_1_2        |
201 					  FE_CAN_FEC_2_3        |
202 					  FE_CAN_FEC_3_4        |
203 					  FE_CAN_FEC_5_6        |
204 					  FE_CAN_FEC_7_8        |
205 					  FE_CAN_FEC_AUTO       |
206 					  FE_CAN_QPSK           |
207 					  FE_CAN_2G_MODULATION;
208 		break;
209 
210 	case FIREDTV_DVB_C:
211 		ops->delsys[0]		= SYS_DVBC_ANNEX_A;
212 
213 		fi->frequency_min_hz	=      47 * MHz;
214 		fi->frequency_max_hz	=     866 * MHz;
215 		fi->frequency_stepsize_hz = 62500;
216 		fi->symbol_rate_min	= 870000;
217 		fi->symbol_rate_max	= 6900000;
218 
219 		fi->caps		= FE_CAN_INVERSION_AUTO |
220 					  FE_CAN_QAM_16		|
221 					  FE_CAN_QAM_32		|
222 					  FE_CAN_QAM_64		|
223 					  FE_CAN_QAM_128	|
224 					  FE_CAN_QAM_256	|
225 					  FE_CAN_QAM_AUTO;
226 		break;
227 
228 	case FIREDTV_DVB_T:
229 		ops->delsys[0]		= SYS_DVBT;
230 
231 		fi->frequency_min_hz	=  49 * MHz;
232 		fi->frequency_max_hz	= 861 * MHz;
233 		fi->frequency_stepsize_hz = 62500;
234 
235 		fi->caps		= FE_CAN_INVERSION_AUTO		|
236 					  FE_CAN_FEC_2_3		|
237 					  FE_CAN_TRANSMISSION_MODE_AUTO |
238 					  FE_CAN_GUARD_INTERVAL_AUTO	|
239 					  FE_CAN_HIERARCHY_AUTO;
240 		break;
241 
242 	default:
243 		dev_err(fdtv->device, "no frontend for model type %d\n",
244 			fdtv->type);
245 	}
246 	strscpy(fi->name, name, sizeof(fi->name));
247 
248 	fdtv->fe.dvb = &fdtv->adapter;
249 	fdtv->fe.sec_priv = fdtv;
250 }
251