Merge branch 'master' into upstream
[linux-2.6] / drivers / media / dvb / dvb-usb / gp8psk-fe.c
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
18 struct 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
28 static 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 */
45 static 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 */
53 static int gp8psk_fe_read_unc_blocks(struct dvb_frontend* fe, u32 *unc)
54 {
55         (void) fe;
56         *unc = 0;
57         return 0;
58 }
59
60 static 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
82 static int gp8psk_fe_read_signal_strength(struct dvb_frontend* fe, u16 *strength)
83 {
84         return gp8psk_fe_read_snr(fe, strength);
85 }
86
87 static 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
93 static 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
132 static int gp8psk_fe_get_frontend(struct dvb_frontend* fe,
133                                   struct dvb_frontend_parameters *fep)
134 {
135         return 0;
136 }
137
138
139 static 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
153 static 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
171 static 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
182 static 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
193 static 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
210 static void gp8psk_fe_release(struct dvb_frontend* fe)
211 {
212         struct gp8psk_fe_state *state = fe->demodulator_priv;
213         kfree(state);
214 }
215
216 static struct dvb_frontend_ops gp8psk_fe_ops;
217
218 struct 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;
229 error:
230         return NULL;
231 success:
232         return &s->fe;
233 }
234
235
236 static 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 };