Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394...
[linux-2.6] / drivers / media / dvb / dvb-usb / vp7045-fe.c
1 /* DVB frontend part of the Linux driver for TwinhanDTV Alpha/MagicBoxII USB2.0
2  * DVB-T receiver.
3  *
4  * Copyright (C) 2004-5 Patrick Boettcher (patrick.boettcher@desy.de)
5  *
6  * Thanks to Twinhan who kindly provided hardware and information.
7  *
8  *      This program is free software; you can redistribute it and/or modify it
9  *      under the terms of the GNU General Public License as published by the Free
10  *      Software Foundation, version 2.
11  *
12  * see Documentation/dvb/README.dvb-usb for more information
13  *
14  */
15 #include "vp7045.h"
16
17 /* It is a Zarlink MT352 within a Samsung Tuner (DNOS404ZH102A) - 040929 - AAT
18  *
19  * Programming is hidden inside the firmware, so set_frontend is very easy.
20  * Even though there is a Firmware command that one can use to access the demod
21  * via its registers. This is used for status information.
22  */
23
24 struct vp7045_fe_state {
25         struct dvb_frontend fe;
26         struct dvb_usb_device *d;
27 };
28
29 static int vp7045_fe_read_status(struct dvb_frontend* fe, fe_status_t *status)
30 {
31         struct vp7045_fe_state *state = fe->demodulator_priv;
32         u8 s0 = vp7045_read_reg(state->d,0x00),
33            s1 = vp7045_read_reg(state->d,0x01),
34            s3 = vp7045_read_reg(state->d,0x03);
35
36         *status = 0;
37         if (s0 & (1 << 4))
38                 *status |= FE_HAS_CARRIER;
39         if (s0 & (1 << 1))
40                 *status |= FE_HAS_VITERBI;
41         if (s0 & (1 << 5))
42                 *status |= FE_HAS_LOCK;
43         if (s1 & (1 << 1))
44                 *status |= FE_HAS_SYNC;
45         if (s3 & (1 << 6))
46                 *status |= FE_HAS_SIGNAL;
47
48         if ((*status & (FE_HAS_CARRIER | FE_HAS_VITERBI | FE_HAS_SYNC)) !=
49                         (FE_HAS_CARRIER | FE_HAS_VITERBI | FE_HAS_SYNC))
50                 *status &= ~FE_HAS_LOCK;
51
52         return 0;
53 }
54
55 static int vp7045_fe_read_ber(struct dvb_frontend* fe, u32 *ber)
56 {
57         struct vp7045_fe_state *state = fe->demodulator_priv;
58         *ber = (vp7045_read_reg(state->d, 0x0D) << 16) |
59                (vp7045_read_reg(state->d, 0x0E) << 8) |
60                 vp7045_read_reg(state->d, 0x0F);
61         return 0;
62 }
63
64 static int vp7045_fe_read_unc_blocks(struct dvb_frontend* fe, u32 *unc)
65 {
66         struct vp7045_fe_state *state = fe->demodulator_priv;
67         *unc = (vp7045_read_reg(state->d, 0x10) << 8) |
68                     vp7045_read_reg(state->d, 0x11);
69         return 0;
70 }
71
72 static int vp7045_fe_read_signal_strength(struct dvb_frontend* fe, u16 *strength)
73 {
74         struct vp7045_fe_state *state = fe->demodulator_priv;
75         u16 signal = (vp7045_read_reg(state->d, 0x14) << 8) |
76                 vp7045_read_reg(state->d, 0x15);
77
78         *strength = ~signal;
79         return 0;
80 }
81
82 static int vp7045_fe_read_snr(struct dvb_frontend* fe, u16 *snr)
83 {
84         struct vp7045_fe_state *state = fe->demodulator_priv;
85         u8 _snr = vp7045_read_reg(state->d, 0x09);
86         *snr = (_snr << 8) | _snr;
87         return 0;
88 }
89
90 static int vp7045_fe_init(struct dvb_frontend* fe)
91 {
92         return 0;
93 }
94
95 static int vp7045_fe_sleep(struct dvb_frontend* fe)
96 {
97         return 0;
98 }
99
100 static int vp7045_fe_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings *tune)
101 {
102         tune->min_delay_ms = 800;
103         return 0;
104 }
105
106 static int vp7045_fe_set_frontend(struct dvb_frontend* fe,
107                                   struct dvb_frontend_parameters *fep)
108 {
109         struct vp7045_fe_state *state = fe->demodulator_priv;
110         u8 buf[5];
111         u32 freq = fep->frequency / 1000;
112
113         buf[0] = (freq >> 16) & 0xff;
114         buf[1] = (freq >>  8) & 0xff;
115         buf[2] =  freq        & 0xff;
116         buf[3] = 0;
117
118         switch (fep->u.ofdm.bandwidth) {
119                 case BANDWIDTH_8_MHZ: buf[4] = 8; break;
120                 case BANDWIDTH_7_MHZ: buf[4] = 7; break;
121                 case BANDWIDTH_6_MHZ: buf[4] = 6; break;
122                 case BANDWIDTH_AUTO: return -EOPNOTSUPP;
123                 default:
124                         return -EINVAL;
125         }
126
127         vp7045_usb_op(state->d,LOCK_TUNER_COMMAND,buf,5,NULL,0,200);
128         return 0;
129 }
130
131 static int vp7045_fe_get_frontend(struct dvb_frontend* fe,
132                                   struct dvb_frontend_parameters *fep)
133 {
134         return 0;
135 }
136
137 static void vp7045_fe_release(struct dvb_frontend* fe)
138 {
139         struct vp7045_fe_state *state = fe->demodulator_priv;
140         kfree(state);
141 }
142
143 static struct dvb_frontend_ops vp7045_fe_ops;
144
145 struct dvb_frontend * vp7045_fe_attach(struct dvb_usb_device *d)
146 {
147         struct vp7045_fe_state *s = kzalloc(sizeof(struct vp7045_fe_state), GFP_KERNEL);
148         if (s == NULL)
149                 goto error;
150
151         s->d = d;
152         memcpy(&s->fe.ops, &vp7045_fe_ops, sizeof(struct dvb_frontend_ops));
153         s->fe.demodulator_priv = s;
154
155         return &s->fe;
156 error:
157         return NULL;
158 }
159
160
161 static struct dvb_frontend_ops vp7045_fe_ops = {
162         .info = {
163                 .name                   = "Twinhan VP7045/46 USB DVB-T",
164                 .type                   = FE_OFDM,
165                 .frequency_min          = 44250000,
166                 .frequency_max          = 867250000,
167                 .frequency_stepsize     = 1000,
168                 .caps = FE_CAN_INVERSION_AUTO |
169                                 FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
170                                 FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
171                                 FE_CAN_QPSK | FE_CAN_QAM_16 | FE_CAN_QAM_64 | FE_CAN_QAM_AUTO |
172                                 FE_CAN_TRANSMISSION_MODE_AUTO |
173                                 FE_CAN_GUARD_INTERVAL_AUTO |
174                                 FE_CAN_RECOVER |
175                                 FE_CAN_HIERARCHY_AUTO,
176         },
177
178         .release = vp7045_fe_release,
179
180         .init = vp7045_fe_init,
181         .sleep = vp7045_fe_sleep,
182
183         .set_frontend = vp7045_fe_set_frontend,
184         .get_frontend = vp7045_fe_get_frontend,
185         .get_tune_settings = vp7045_fe_get_tune_settings,
186
187         .read_status = vp7045_fe_read_status,
188         .read_ber = vp7045_fe_read_ber,
189         .read_signal_strength = vp7045_fe_read_signal_strength,
190         .read_snr = vp7045_fe_read_snr,
191         .read_ucblocks = vp7045_fe_read_unc_blocks,
192 };