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@posteo.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/media/dvb-drivers/dvb-usb.rst 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, 30 enum fe_status *status) 31 { 32 struct vp7045_fe_state *state = fe->demodulator_priv; 33 u8 s0 = vp7045_read_reg(state->d,0x00), 34 s1 = vp7045_read_reg(state->d,0x01), 35 s3 = vp7045_read_reg(state->d,0x03); 36 37 *status = 0; 38 if (s0 & (1 << 4)) 39 *status |= FE_HAS_CARRIER; 40 if (s0 & (1 << 1)) 41 *status |= FE_HAS_VITERBI; 42 if (s0 & (1 << 5)) 43 *status |= FE_HAS_LOCK; 44 if (s1 & (1 << 1)) 45 *status |= FE_HAS_SYNC; 46 if (s3 & (1 << 6)) 47 *status |= FE_HAS_SIGNAL; 48 49 if ((*status & (FE_HAS_CARRIER | FE_HAS_VITERBI | FE_HAS_SYNC)) != 50 (FE_HAS_CARRIER | FE_HAS_VITERBI | FE_HAS_SYNC)) 51 *status &= ~FE_HAS_LOCK; 52 53 return 0; 54 } 55 56 static int vp7045_fe_read_ber(struct dvb_frontend* fe, u32 *ber) 57 { 58 struct vp7045_fe_state *state = fe->demodulator_priv; 59 *ber = (vp7045_read_reg(state->d, 0x0D) << 16) | 60 (vp7045_read_reg(state->d, 0x0E) << 8) | 61 vp7045_read_reg(state->d, 0x0F); 62 return 0; 63 } 64 65 static int vp7045_fe_read_unc_blocks(struct dvb_frontend* fe, u32 *unc) 66 { 67 struct vp7045_fe_state *state = fe->demodulator_priv; 68 *unc = (vp7045_read_reg(state->d, 0x10) << 8) | 69 vp7045_read_reg(state->d, 0x11); 70 return 0; 71 } 72 73 static int vp7045_fe_read_signal_strength(struct dvb_frontend* fe, u16 *strength) 74 { 75 struct vp7045_fe_state *state = fe->demodulator_priv; 76 u16 signal = (vp7045_read_reg(state->d, 0x14) << 8) | 77 vp7045_read_reg(state->d, 0x15); 78 79 *strength = ~signal; 80 return 0; 81 } 82 83 static int vp7045_fe_read_snr(struct dvb_frontend* fe, u16 *snr) 84 { 85 struct vp7045_fe_state *state = fe->demodulator_priv; 86 u8 _snr = vp7045_read_reg(state->d, 0x09); 87 *snr = (_snr << 8) | _snr; 88 return 0; 89 } 90 91 static int vp7045_fe_init(struct dvb_frontend* fe) 92 { 93 return 0; 94 } 95 96 static int vp7045_fe_sleep(struct dvb_frontend* fe) 97 { 98 return 0; 99 } 100 101 static int vp7045_fe_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings *tune) 102 { 103 tune->min_delay_ms = 800; 104 return 0; 105 } 106 107 static int vp7045_fe_set_frontend(struct dvb_frontend *fe) 108 { 109 struct dtv_frontend_properties *fep = &fe->dtv_property_cache; 110 struct vp7045_fe_state *state = fe->demodulator_priv; 111 u8 buf[5]; 112 u32 freq = fep->frequency / 1000; 113 114 buf[0] = (freq >> 16) & 0xff; 115 buf[1] = (freq >> 8) & 0xff; 116 buf[2] = freq & 0xff; 117 buf[3] = 0; 118 119 switch (fep->bandwidth_hz) { 120 case 8000000: 121 buf[4] = 8; 122 break; 123 case 7000000: 124 buf[4] = 7; 125 break; 126 case 6000000: 127 buf[4] = 6; 128 break; 129 default: 130 return -EINVAL; 131 } 132 133 vp7045_usb_op(state->d,LOCK_TUNER_COMMAND,buf,5,NULL,0,200); 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 const 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 const struct dvb_frontend_ops vp7045_fe_ops = { 162 .delsys = { SYS_DVBT }, 163 .info = { 164 .name = "Twinhan VP7045/46 USB DVB-T", 165 .frequency_min_hz = 44250 * kHz, 166 .frequency_max_hz = 867250 * kHz, 167 .frequency_stepsize_hz = 1 * kHz, 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_tune_settings = vp7045_fe_get_tune_settings, 185 186 .read_status = vp7045_fe_read_status, 187 .read_ber = vp7045_fe_read_ber, 188 .read_signal_strength = vp7045_fe_read_signal_strength, 189 .read_snr = vp7045_fe_read_snr, 190 .read_ucblocks = vp7045_fe_read_unc_blocks, 191 }; 192