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 { 108 struct dtv_frontend_properties *fep = &fe->dtv_property_cache; 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->bandwidth_hz) { 119 case 8000000: 120 buf[4] = 8; 121 break; 122 case 7000000: 123 buf[4] = 7; 124 break; 125 case 6000000: 126 buf[4] = 6; 127 break; 128 default: 129 return -EINVAL; 130 } 131 132 vp7045_usb_op(state->d,LOCK_TUNER_COMMAND,buf,5,NULL,0,200); 133 return 0; 134 } 135 136 static void vp7045_fe_release(struct dvb_frontend* fe) 137 { 138 struct vp7045_fe_state *state = fe->demodulator_priv; 139 kfree(state); 140 } 141 142 static struct dvb_frontend_ops vp7045_fe_ops; 143 144 struct dvb_frontend * vp7045_fe_attach(struct dvb_usb_device *d) 145 { 146 struct vp7045_fe_state *s = kzalloc(sizeof(struct vp7045_fe_state), GFP_KERNEL); 147 if (s == NULL) 148 goto error; 149 150 s->d = d; 151 memcpy(&s->fe.ops, &vp7045_fe_ops, sizeof(struct dvb_frontend_ops)); 152 s->fe.demodulator_priv = s; 153 154 return &s->fe; 155 error: 156 return NULL; 157 } 158 159 160 static struct dvb_frontend_ops vp7045_fe_ops = { 161 .delsys = { SYS_DVBT }, 162 .info = { 163 .name = "Twinhan VP7045/46 USB DVB-T", 164 .frequency_min = 44250000, 165 .frequency_max = 867250000, 166 .frequency_stepsize = 1000, 167 .caps = FE_CAN_INVERSION_AUTO | 168 FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 | 169 FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO | 170 FE_CAN_QPSK | FE_CAN_QAM_16 | FE_CAN_QAM_64 | FE_CAN_QAM_AUTO | 171 FE_CAN_TRANSMISSION_MODE_AUTO | 172 FE_CAN_GUARD_INTERVAL_AUTO | 173 FE_CAN_RECOVER | 174 FE_CAN_HIERARCHY_AUTO, 175 }, 176 177 .release = vp7045_fe_release, 178 179 .init = vp7045_fe_init, 180 .sleep = vp7045_fe_sleep, 181 182 .set_frontend = vp7045_fe_set_frontend, 183 .get_tune_settings = vp7045_fe_get_tune_settings, 184 185 .read_status = vp7045_fe_read_status, 186 .read_ber = vp7045_fe_read_ber, 187 .read_signal_strength = vp7045_fe_read_signal_strength, 188 .read_snr = vp7045_fe_read_snr, 189 .read_ucblocks = vp7045_fe_read_unc_blocks, 190 }; 191