Merge branch 'drm-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied...
[linux-2.6] / drivers / media / dvb / dvb-usb / dtt200u-fe.c
1 /* Frontend part of the Linux driver for the WideView/ Yakumo/ Hama/
2  * Typhoon/ Yuan DVB-T USB2.0 receiver.
3  *
4  * Copyright (C) 2005 Patrick Boettcher <patrick.boettcher@desy.de>
5  *
6  *      This program is free software; you can redistribute it and/or modify it
7  *      under the terms of the GNU General Public License as published by the Free
8  *      Software Foundation, version 2.
9  *
10  * see Documentation/dvb/README.dvb-usb for more information
11  */
12 #include "dtt200u.h"
13
14 struct dtt200u_fe_state {
15         struct dvb_usb_device *d;
16
17         fe_status_t stat;
18
19         struct dvb_frontend_parameters fep;
20         struct dvb_frontend frontend;
21 };
22
23 static int dtt200u_fe_read_status(struct dvb_frontend* fe, fe_status_t *stat)
24 {
25         struct dtt200u_fe_state *state = fe->demodulator_priv;
26         u8 st = GET_TUNE_STATUS, b[3];
27
28         dvb_usb_generic_rw(state->d,&st,1,b,3,0);
29
30         switch (b[0]) {
31                 case 0x01:
32                         *stat = FE_HAS_SIGNAL | FE_HAS_CARRIER |
33                                 FE_HAS_VITERBI | FE_HAS_SYNC | FE_HAS_LOCK;
34                         break;
35                 case 0x00: /* pending */
36                         *stat = FE_TIMEDOUT; /* during set_frontend */
37                         break;
38                 default:
39                 case 0x02: /* failed */
40                         *stat = 0;
41                         break;
42         }
43         return 0;
44 }
45
46 static int dtt200u_fe_read_ber(struct dvb_frontend* fe, u32 *ber)
47 {
48         struct dtt200u_fe_state *state = fe->demodulator_priv;
49         u8 bw = GET_VIT_ERR_CNT,b[3];
50         dvb_usb_generic_rw(state->d,&bw,1,b,3,0);
51         *ber = (b[0] << 16) | (b[1] << 8) | b[2];
52         return 0;
53 }
54
55 static int dtt200u_fe_read_unc_blocks(struct dvb_frontend* fe, u32 *unc)
56 {
57         struct dtt200u_fe_state *state = fe->demodulator_priv;
58         u8 bw = GET_RS_UNCOR_BLK_CNT,b[2];
59
60         dvb_usb_generic_rw(state->d,&bw,1,b,2,0);
61         *unc = (b[0] << 8) | b[1];
62         return 0;
63 }
64
65 static int dtt200u_fe_read_signal_strength(struct dvb_frontend* fe, u16 *strength)
66 {
67         struct dtt200u_fe_state *state = fe->demodulator_priv;
68         u8 bw = GET_AGC, b;
69         dvb_usb_generic_rw(state->d,&bw,1,&b,1,0);
70         *strength = (b << 8) | b;
71         return 0;
72 }
73
74 static int dtt200u_fe_read_snr(struct dvb_frontend* fe, u16 *snr)
75 {
76         struct dtt200u_fe_state *state = fe->demodulator_priv;
77         u8 bw = GET_SNR,br;
78         dvb_usb_generic_rw(state->d,&bw,1,&br,1,0);
79         *snr = ~((br << 8) | br);
80         return 0;
81 }
82
83 static int dtt200u_fe_init(struct dvb_frontend* fe)
84 {
85         struct dtt200u_fe_state *state = fe->demodulator_priv;
86         u8 b = SET_INIT;
87         return dvb_usb_generic_write(state->d,&b,1);
88 }
89
90 static int dtt200u_fe_sleep(struct dvb_frontend* fe)
91 {
92         return dtt200u_fe_init(fe);
93 }
94
95 static int dtt200u_fe_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings *tune)
96 {
97         tune->min_delay_ms = 1500;
98         tune->step_size = 0;
99         tune->max_drift = 0;
100         return 0;
101 }
102
103 static int dtt200u_fe_set_frontend(struct dvb_frontend* fe,
104                                   struct dvb_frontend_parameters *fep)
105 {
106         struct dtt200u_fe_state *state = fe->demodulator_priv;
107         int i;
108         fe_status_t st;
109         u16 freq = fep->frequency / 250000;
110         u8 bwbuf[2] = { SET_BANDWIDTH, 0 },freqbuf[3] = { SET_RF_FREQ, 0, 0 };
111
112         switch (fep->u.ofdm.bandwidth) {
113                 case BANDWIDTH_8_MHZ: bwbuf[1] = 8; break;
114                 case BANDWIDTH_7_MHZ: bwbuf[1] = 7; break;
115                 case BANDWIDTH_6_MHZ: bwbuf[1] = 6; break;
116                 case BANDWIDTH_AUTO: return -EOPNOTSUPP;
117                 default:
118                         return -EINVAL;
119         }
120
121         dvb_usb_generic_write(state->d,bwbuf,2);
122
123         freqbuf[1] = freq & 0xff;
124         freqbuf[2] = (freq >> 8) & 0xff;
125         dvb_usb_generic_write(state->d,freqbuf,3);
126
127         for (i = 0; i < 30; i++) {
128                 msleep(20);
129                 dtt200u_fe_read_status(fe, &st);
130                 if (st & FE_TIMEDOUT)
131                         continue;
132         }
133
134         return 0;
135 }
136
137 static int dtt200u_fe_get_frontend(struct dvb_frontend* fe,
138                                   struct dvb_frontend_parameters *fep)
139 {
140         struct dtt200u_fe_state *state = fe->demodulator_priv;
141         memcpy(fep,&state->fep,sizeof(struct dvb_frontend_parameters));
142         return 0;
143 }
144
145 static void dtt200u_fe_release(struct dvb_frontend* fe)
146 {
147         struct dtt200u_fe_state *state = (struct dtt200u_fe_state*) fe->demodulator_priv;
148         kfree(state);
149 }
150
151 static struct dvb_frontend_ops dtt200u_fe_ops;
152
153 struct dvb_frontend* dtt200u_fe_attach(struct dvb_usb_device *d)
154 {
155         struct dtt200u_fe_state* state = NULL;
156
157         /* allocate memory for the internal state */
158         state = kzalloc(sizeof(struct dtt200u_fe_state), GFP_KERNEL);
159         if (state == NULL)
160                 goto error;
161
162         deb_info("attaching frontend dtt200u\n");
163
164         state->d = d;
165
166         memcpy(&state->frontend.ops,&dtt200u_fe_ops,sizeof(struct dvb_frontend_ops));
167         state->frontend.demodulator_priv = state;
168
169         return &state->frontend;
170 error:
171         return NULL;
172 }
173
174 static struct dvb_frontend_ops dtt200u_fe_ops = {
175         .info = {
176                 .name                   = "WideView USB DVB-T",
177                 .type                   = FE_OFDM,
178                 .frequency_min          = 44250000,
179                 .frequency_max          = 867250000,
180                 .frequency_stepsize     = 250000,
181                 .caps = FE_CAN_INVERSION_AUTO |
182                                 FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
183                                 FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
184                                 FE_CAN_QPSK | FE_CAN_QAM_16 | FE_CAN_QAM_64 | FE_CAN_QAM_AUTO |
185                                 FE_CAN_TRANSMISSION_MODE_AUTO |
186                                 FE_CAN_GUARD_INTERVAL_AUTO |
187                                 FE_CAN_RECOVER |
188                                 FE_CAN_HIERARCHY_AUTO,
189         },
190
191         .release = dtt200u_fe_release,
192
193         .init = dtt200u_fe_init,
194         .sleep = dtt200u_fe_sleep,
195
196         .set_frontend = dtt200u_fe_set_frontend,
197         .get_frontend = dtt200u_fe_get_frontend,
198         .get_tune_settings = dtt200u_fe_get_tune_settings,
199
200         .read_status = dtt200u_fe_read_status,
201         .read_ber = dtt200u_fe_read_ber,
202         .read_signal_strength = dtt200u_fe_read_signal_strength,
203         .read_snr = dtt200u_fe_read_snr,
204         .read_ucblocks = dtt200u_fe_read_unc_blocks,
205 };