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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 | // SPDX-License-Identifier: GPL-2.0-only /* DVB frontend part of the Linux driver for TwinhanDTV Alpha/MagicBoxII USB2.0 * DVB-T receiver. * * Copyright (C) 2004-5 Patrick Boettcher (patrick.boettcher@posteo.de) * * Thanks to Twinhan who kindly provided hardware and information. * * see Documentation/driver-api/media/drivers/dvb-usb.rst for more information */ #include "vp7045.h" /* It is a Zarlink MT352 within a Samsung Tuner (DNOS404ZH102A) - 040929 - AAT * * Programming is hidden inside the firmware, so set_frontend is very easy. * Even though there is a Firmware command that one can use to access the demod * via its registers. This is used for status information. */ struct vp7045_fe_state { struct dvb_frontend fe; struct dvb_usb_device *d; }; static int vp7045_fe_read_status(struct dvb_frontend *fe, enum fe_status *status) { struct vp7045_fe_state *state = fe->demodulator_priv; u8 s0 = vp7045_read_reg(state->d,0x00), s1 = vp7045_read_reg(state->d,0x01), s3 = vp7045_read_reg(state->d,0x03); *status = 0; if (s0 & (1 << 4)) *status |= FE_HAS_CARRIER; if (s0 & (1 << 1)) *status |= FE_HAS_VITERBI; if (s0 & (1 << 5)) *status |= FE_HAS_LOCK; if (s1 & (1 << 1)) *status |= FE_HAS_SYNC; if (s3 & (1 << 6)) *status |= FE_HAS_SIGNAL; if ((*status & (FE_HAS_CARRIER | FE_HAS_VITERBI | FE_HAS_SYNC)) != (FE_HAS_CARRIER | FE_HAS_VITERBI | FE_HAS_SYNC)) *status &= ~FE_HAS_LOCK; return 0; } static int vp7045_fe_read_ber(struct dvb_frontend* fe, u32 *ber) { struct vp7045_fe_state *state = fe->demodulator_priv; *ber = (vp7045_read_reg(state->d, 0x0D) << 16) | (vp7045_read_reg(state->d, 0x0E) << 8) | vp7045_read_reg(state->d, 0x0F); return 0; } static int vp7045_fe_read_unc_blocks(struct dvb_frontend* fe, u32 *unc) { struct vp7045_fe_state *state = fe->demodulator_priv; *unc = (vp7045_read_reg(state->d, 0x10) << 8) | vp7045_read_reg(state->d, 0x11); return 0; } static int vp7045_fe_read_signal_strength(struct dvb_frontend* fe, u16 *strength) { struct vp7045_fe_state *state = fe->demodulator_priv; u16 signal = (vp7045_read_reg(state->d, 0x14) << 8) | vp7045_read_reg(state->d, 0x15); *strength = ~signal; return 0; } static int vp7045_fe_read_snr(struct dvb_frontend* fe, u16 *snr) { struct vp7045_fe_state *state = fe->demodulator_priv; u8 _snr = vp7045_read_reg(state->d, 0x09); *snr = (_snr << 8) | _snr; return 0; } static int vp7045_fe_init(struct dvb_frontend* fe) { return 0; } static int vp7045_fe_sleep(struct dvb_frontend* fe) { return 0; } static int vp7045_fe_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings *tune) { tune->min_delay_ms = 800; return 0; } static int vp7045_fe_set_frontend(struct dvb_frontend *fe) { struct dtv_frontend_properties *fep = &fe->dtv_property_cache; struct vp7045_fe_state *state = fe->demodulator_priv; u8 buf[5]; u32 freq = fep->frequency / 1000; buf[0] = (freq >> 16) & 0xff; buf[1] = (freq >> 8) & 0xff; buf[2] = freq & 0xff; buf[3] = 0; switch (fep->bandwidth_hz) { case 8000000: buf[4] = 8; break; case 7000000: buf[4] = 7; break; case 6000000: buf[4] = 6; break; default: return -EINVAL; } vp7045_usb_op(state->d,LOCK_TUNER_COMMAND,buf,5,NULL,0,200); return 0; } static void vp7045_fe_release(struct dvb_frontend* fe) { struct vp7045_fe_state *state = fe->demodulator_priv; kfree(state); } static const struct dvb_frontend_ops vp7045_fe_ops; struct dvb_frontend * vp7045_fe_attach(struct dvb_usb_device *d) { struct vp7045_fe_state *s = kzalloc(sizeof(struct vp7045_fe_state), GFP_KERNEL); if (s == NULL) goto error; s->d = d; memcpy(&s->fe.ops, &vp7045_fe_ops, sizeof(struct dvb_frontend_ops)); s->fe.demodulator_priv = s; return &s->fe; error: return NULL; } static const struct dvb_frontend_ops vp7045_fe_ops = { .delsys = { SYS_DVBT }, .info = { .name = "Twinhan VP7045/46 USB DVB-T", .frequency_min_hz = 44250 * kHz, .frequency_max_hz = 867250 * kHz, .frequency_stepsize_hz = 1 * kHz, .caps = FE_CAN_INVERSION_AUTO | FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 | FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO | FE_CAN_QPSK | FE_CAN_QAM_16 | FE_CAN_QAM_64 | FE_CAN_QAM_AUTO | FE_CAN_TRANSMISSION_MODE_AUTO | FE_CAN_GUARD_INTERVAL_AUTO | FE_CAN_RECOVER | FE_CAN_HIERARCHY_AUTO, }, .release = vp7045_fe_release, .init = vp7045_fe_init, .sleep = vp7045_fe_sleep, .set_frontend = vp7045_fe_set_frontend, .get_tune_settings = vp7045_fe_get_tune_settings, .read_status = vp7045_fe_read_status, .read_ber = vp7045_fe_read_ber, .read_signal_strength = vp7045_fe_read_signal_strength, .read_snr = vp7045_fe_read_snr, .read_ucblocks = vp7045_fe_read_unc_blocks, }; |