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1// SPDX-License-Identifier: GPL-2.0-only2/* DVB frontend part of the Linux driver for TwinhanDTV Alpha/MagicBoxII USB2.03 * DVB-T receiver.4 *5 * Copyright (C) 2004-5 Patrick Boettcher (patrick.boettcher@posteo.de)6 *7 * Thanks to Twinhan who kindly provided hardware and information.8 *9 * see Documentation/driver-api/media/drivers/dvb-usb.rst for more information10 */11#include "vp7045.h"12 13/* It is a Zarlink MT352 within a Samsung Tuner (DNOS404ZH102A) - 040929 - AAT14 *15 * Programming is hidden inside the firmware, so set_frontend is very easy.16 * Even though there is a Firmware command that one can use to access the demod17 * via its registers. This is used for status information.18 */19 20struct vp7045_fe_state {21 struct dvb_frontend fe;22 struct dvb_usb_device *d;23};24 25static int vp7045_fe_read_status(struct dvb_frontend *fe,26 enum fe_status *status)27{28 struct vp7045_fe_state *state = fe->demodulator_priv;29 u8 s0 = vp7045_read_reg(state->d,0x00),30 s1 = vp7045_read_reg(state->d,0x01),31 s3 = vp7045_read_reg(state->d,0x03);32 33 *status = 0;34 if (s0 & (1 << 4))35 *status |= FE_HAS_CARRIER;36 if (s0 & (1 << 1))37 *status |= FE_HAS_VITERBI;38 if (s0 & (1 << 5))39 *status |= FE_HAS_LOCK;40 if (s1 & (1 << 1))41 *status |= FE_HAS_SYNC;42 if (s3 & (1 << 6))43 *status |= FE_HAS_SIGNAL;44 45 if ((*status & (FE_HAS_CARRIER | FE_HAS_VITERBI | FE_HAS_SYNC)) !=46 (FE_HAS_CARRIER | FE_HAS_VITERBI | FE_HAS_SYNC))47 *status &= ~FE_HAS_LOCK;48 49 return 0;50}51 52static int vp7045_fe_read_ber(struct dvb_frontend* fe, u32 *ber)53{54 struct vp7045_fe_state *state = fe->demodulator_priv;55 *ber = (vp7045_read_reg(state->d, 0x0D) << 16) |56 (vp7045_read_reg(state->d, 0x0E) << 8) |57 vp7045_read_reg(state->d, 0x0F);58 return 0;59}60 61static int vp7045_fe_read_unc_blocks(struct dvb_frontend* fe, u32 *unc)62{63 struct vp7045_fe_state *state = fe->demodulator_priv;64 *unc = (vp7045_read_reg(state->d, 0x10) << 8) |65 vp7045_read_reg(state->d, 0x11);66 return 0;67}68 69static int vp7045_fe_read_signal_strength(struct dvb_frontend* fe, u16 *strength)70{71 struct vp7045_fe_state *state = fe->demodulator_priv;72 u16 signal = (vp7045_read_reg(state->d, 0x14) << 8) |73 vp7045_read_reg(state->d, 0x15);74 75 *strength = ~signal;76 return 0;77}78 79static int vp7045_fe_read_snr(struct dvb_frontend* fe, u16 *snr)80{81 struct vp7045_fe_state *state = fe->demodulator_priv;82 u8 _snr = vp7045_read_reg(state->d, 0x09);83 *snr = (_snr << 8) | _snr;84 return 0;85}86 87static int vp7045_fe_init(struct dvb_frontend* fe)88{89 return 0;90}91 92static int vp7045_fe_sleep(struct dvb_frontend* fe)93{94 return 0;95}96 97static int vp7045_fe_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings *tune)98{99 tune->min_delay_ms = 800;100 return 0;101}102 103static int vp7045_fe_set_frontend(struct dvb_frontend *fe)104{105 struct dtv_frontend_properties *fep = &fe->dtv_property_cache;106 struct vp7045_fe_state *state = fe->demodulator_priv;107 u8 buf[5];108 u32 freq = fep->frequency / 1000;109 110 buf[0] = (freq >> 16) & 0xff;111 buf[1] = (freq >> 8) & 0xff;112 buf[2] = freq & 0xff;113 buf[3] = 0;114 115 switch (fep->bandwidth_hz) {116 case 8000000:117 buf[4] = 8;118 break;119 case 7000000:120 buf[4] = 7;121 break;122 case 6000000:123 buf[4] = 6;124 break;125 default:126 return -EINVAL;127 }128 129 vp7045_usb_op(state->d,LOCK_TUNER_COMMAND,buf,5,NULL,0,200);130 return 0;131}132 133static void vp7045_fe_release(struct dvb_frontend* fe)134{135 struct vp7045_fe_state *state = fe->demodulator_priv;136 kfree(state);137}138 139static const struct dvb_frontend_ops vp7045_fe_ops;140 141struct dvb_frontend * vp7045_fe_attach(struct dvb_usb_device *d)142{143 struct vp7045_fe_state *s = kzalloc(sizeof(struct vp7045_fe_state), GFP_KERNEL);144 if (s == NULL)145 goto error;146 147 s->d = d;148 memcpy(&s->fe.ops, &vp7045_fe_ops, sizeof(struct dvb_frontend_ops));149 s->fe.demodulator_priv = s;150 151 return &s->fe;152error:153 return NULL;154}155 156 157static const struct dvb_frontend_ops vp7045_fe_ops = {158 .delsys = { SYS_DVBT },159 .info = {160 .name = "Twinhan VP7045/46 USB DVB-T",161 .frequency_min_hz = 44250 * kHz,162 .frequency_max_hz = 867250 * kHz,163 .frequency_stepsize_hz = 1 * kHz,164 .caps = FE_CAN_INVERSION_AUTO |165 FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |166 FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |167 FE_CAN_QPSK | FE_CAN_QAM_16 | FE_CAN_QAM_64 | FE_CAN_QAM_AUTO |168 FE_CAN_TRANSMISSION_MODE_AUTO |169 FE_CAN_GUARD_INTERVAL_AUTO |170 FE_CAN_RECOVER |171 FE_CAN_HIERARCHY_AUTO,172 },173 174 .release = vp7045_fe_release,175 176 .init = vp7045_fe_init,177 .sleep = vp7045_fe_sleep,178 179 .set_frontend = vp7045_fe_set_frontend,180 .get_tune_settings = vp7045_fe_get_tune_settings,181 182 .read_status = vp7045_fe_read_status,183 .read_ber = vp7045_fe_read_ber,184 .read_signal_strength = vp7045_fe_read_signal_strength,185 .read_snr = vp7045_fe_read_snr,186 .read_ucblocks = vp7045_fe_read_unc_blocks,187};188