mirror of https://gitee.com/openkylin/linux.git
398 lines
9.7 KiB
C
398 lines
9.7 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Frontend driver for the GENPIX 8pks/qpsk/DCII USB2.0 DVB-S module
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*
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* Copyright (C) 2006,2007 Alan Nisota (alannisota@gmail.com)
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* Copyright (C) 2006,2007 Genpix Electronics (genpix@genpix-electronics.com)
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*
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* Thanks to GENPIX for the sample code used to implement this module.
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*
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* This module is based off the vp7045 and vp702x modules
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include "gp8psk-fe.h"
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#include <media/dvb_frontend.h>
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static int debug;
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module_param(debug, int, 0644);
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MODULE_PARM_DESC(debug, "Turn on/off debugging (default:off).");
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#define dprintk(fmt, arg...) do { \
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if (debug) \
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printk(KERN_DEBUG pr_fmt("%s: " fmt), \
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__func__, ##arg); \
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} while (0)
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struct gp8psk_fe_state {
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struct dvb_frontend fe;
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void *priv;
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const struct gp8psk_fe_ops *ops;
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bool is_rev1;
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u8 lock;
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u16 snr;
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unsigned long next_status_check;
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unsigned long status_check_interval;
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};
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static int gp8psk_tuned_to_DCII(struct dvb_frontend *fe)
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{
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struct gp8psk_fe_state *st = fe->demodulator_priv;
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u8 status;
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st->ops->in(st->priv, GET_8PSK_CONFIG, 0, 0, &status, 1);
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return status & bmDCtuned;
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}
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static int gp8psk_set_tuner_mode(struct dvb_frontend *fe, int mode)
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{
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struct gp8psk_fe_state *st = fe->demodulator_priv;
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return st->ops->out(st->priv, SET_8PSK_CONFIG, mode, 0, NULL, 0);
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}
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static int gp8psk_fe_update_status(struct gp8psk_fe_state *st)
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{
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u8 buf[6];
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if (time_after(jiffies,st->next_status_check)) {
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st->ops->in(st->priv, GET_SIGNAL_LOCK, 0, 0, &st->lock, 1);
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st->ops->in(st->priv, GET_SIGNAL_STRENGTH, 0, 0, buf, 6);
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st->snr = (buf[1]) << 8 | buf[0];
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st->next_status_check = jiffies + (st->status_check_interval*HZ)/1000;
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}
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return 0;
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}
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static int gp8psk_fe_read_status(struct dvb_frontend *fe,
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enum fe_status *status)
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{
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struct gp8psk_fe_state *st = fe->demodulator_priv;
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gp8psk_fe_update_status(st);
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if (st->lock)
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*status = FE_HAS_LOCK | FE_HAS_SYNC | FE_HAS_VITERBI | FE_HAS_SIGNAL | FE_HAS_CARRIER;
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else
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*status = 0;
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if (*status & FE_HAS_LOCK)
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st->status_check_interval = 1000;
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else
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st->status_check_interval = 100;
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return 0;
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}
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/* not supported by this Frontend */
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static int gp8psk_fe_read_ber(struct dvb_frontend* fe, u32 *ber)
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{
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(void) fe;
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*ber = 0;
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return 0;
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}
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/* not supported by this Frontend */
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static int gp8psk_fe_read_unc_blocks(struct dvb_frontend* fe, u32 *unc)
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{
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(void) fe;
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*unc = 0;
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return 0;
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}
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static int gp8psk_fe_read_snr(struct dvb_frontend* fe, u16 *snr)
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{
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struct gp8psk_fe_state *st = fe->demodulator_priv;
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gp8psk_fe_update_status(st);
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/* snr is reported in dBu*256 */
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*snr = st->snr;
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return 0;
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}
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static int gp8psk_fe_read_signal_strength(struct dvb_frontend* fe, u16 *strength)
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{
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struct gp8psk_fe_state *st = fe->demodulator_priv;
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gp8psk_fe_update_status(st);
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/* snr is reported in dBu*256 */
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/* snr / 38.4 ~= 100% strength */
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/* snr * 17 returns 100% strength as 65535 */
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if (st->snr > 0xf00)
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*strength = 0xffff;
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else
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*strength = (st->snr << 4) + st->snr; /* snr*17 */
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return 0;
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}
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static int gp8psk_fe_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings *tune)
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{
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tune->min_delay_ms = 800;
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return 0;
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}
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static int gp8psk_fe_set_frontend(struct dvb_frontend *fe)
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{
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struct gp8psk_fe_state *st = fe->demodulator_priv;
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struct dtv_frontend_properties *c = &fe->dtv_property_cache;
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u8 cmd[10];
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u32 freq = c->frequency * 1000;
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dprintk("%s()\n", __func__);
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cmd[4] = freq & 0xff;
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cmd[5] = (freq >> 8) & 0xff;
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cmd[6] = (freq >> 16) & 0xff;
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cmd[7] = (freq >> 24) & 0xff;
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/* backwards compatibility: DVB-S + 8-PSK were used for Turbo-FEC */
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if (c->delivery_system == SYS_DVBS && c->modulation == PSK_8)
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c->delivery_system = SYS_TURBO;
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switch (c->delivery_system) {
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case SYS_DVBS:
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if (c->modulation != QPSK) {
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dprintk("%s: unsupported modulation selected (%d)\n",
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__func__, c->modulation);
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return -EOPNOTSUPP;
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}
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c->fec_inner = FEC_AUTO;
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break;
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case SYS_DVBS2: /* kept for backwards compatibility */
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dprintk("%s: DVB-S2 delivery system selected\n", __func__);
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break;
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case SYS_TURBO:
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dprintk("%s: Turbo-FEC delivery system selected\n", __func__);
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break;
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default:
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dprintk("%s: unsupported delivery system selected (%d)\n",
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__func__, c->delivery_system);
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return -EOPNOTSUPP;
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}
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cmd[0] = c->symbol_rate & 0xff;
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cmd[1] = (c->symbol_rate >> 8) & 0xff;
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cmd[2] = (c->symbol_rate >> 16) & 0xff;
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cmd[3] = (c->symbol_rate >> 24) & 0xff;
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switch (c->modulation) {
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case QPSK:
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if (st->is_rev1)
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if (gp8psk_tuned_to_DCII(fe))
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st->ops->reload(st->priv);
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switch (c->fec_inner) {
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case FEC_1_2:
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cmd[9] = 0; break;
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case FEC_2_3:
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cmd[9] = 1; break;
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case FEC_3_4:
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cmd[9] = 2; break;
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case FEC_5_6:
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cmd[9] = 3; break;
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case FEC_7_8:
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cmd[9] = 4; break;
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case FEC_AUTO:
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cmd[9] = 5; break;
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default:
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cmd[9] = 5; break;
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}
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if (c->delivery_system == SYS_TURBO)
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cmd[8] = ADV_MOD_TURBO_QPSK;
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else
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cmd[8] = ADV_MOD_DVB_QPSK;
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break;
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case PSK_8: /* PSK_8 is for compatibility with DN */
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cmd[8] = ADV_MOD_TURBO_8PSK;
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switch (c->fec_inner) {
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case FEC_2_3:
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cmd[9] = 0; break;
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case FEC_3_4:
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cmd[9] = 1; break;
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case FEC_3_5:
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cmd[9] = 2; break;
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case FEC_5_6:
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cmd[9] = 3; break;
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case FEC_8_9:
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cmd[9] = 4; break;
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default:
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cmd[9] = 0; break;
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}
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break;
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case QAM_16: /* QAM_16 is for compatibility with DN */
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cmd[8] = ADV_MOD_TURBO_16QAM;
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cmd[9] = 0;
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break;
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default: /* Unknown modulation */
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dprintk("%s: unsupported modulation selected (%d)\n",
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__func__, c->modulation);
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return -EOPNOTSUPP;
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}
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if (st->is_rev1)
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gp8psk_set_tuner_mode(fe, 0);
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st->ops->out(st->priv, TUNE_8PSK, 0, 0, cmd, 10);
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st->lock = 0;
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st->next_status_check = jiffies;
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st->status_check_interval = 200;
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return 0;
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}
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static int gp8psk_fe_send_diseqc_msg (struct dvb_frontend* fe,
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struct dvb_diseqc_master_cmd *m)
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{
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struct gp8psk_fe_state *st = fe->demodulator_priv;
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dprintk("%s\n", __func__);
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if (st->ops->out(st->priv, SEND_DISEQC_COMMAND, m->msg[0], 0,
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m->msg, m->msg_len)) {
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return -EINVAL;
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}
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return 0;
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}
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static int gp8psk_fe_send_diseqc_burst(struct dvb_frontend *fe,
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enum fe_sec_mini_cmd burst)
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{
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struct gp8psk_fe_state *st = fe->demodulator_priv;
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u8 cmd;
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dprintk("%s\n", __func__);
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/* These commands are certainly wrong */
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cmd = (burst == SEC_MINI_A) ? 0x00 : 0x01;
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if (st->ops->out(st->priv, SEND_DISEQC_COMMAND, cmd, 0,
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&cmd, 0)) {
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return -EINVAL;
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}
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return 0;
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}
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static int gp8psk_fe_set_tone(struct dvb_frontend *fe,
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enum fe_sec_tone_mode tone)
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{
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struct gp8psk_fe_state *st = fe->demodulator_priv;
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if (st->ops->out(st->priv, SET_22KHZ_TONE,
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(tone == SEC_TONE_ON), 0, NULL, 0)) {
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return -EINVAL;
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}
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return 0;
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}
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static int gp8psk_fe_set_voltage(struct dvb_frontend *fe,
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enum fe_sec_voltage voltage)
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{
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struct gp8psk_fe_state *st = fe->demodulator_priv;
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if (st->ops->out(st->priv, SET_LNB_VOLTAGE,
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voltage == SEC_VOLTAGE_18, 0, NULL, 0)) {
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return -EINVAL;
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}
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return 0;
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}
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static int gp8psk_fe_enable_high_lnb_voltage(struct dvb_frontend* fe, long onoff)
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{
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struct gp8psk_fe_state *st = fe->demodulator_priv;
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return st->ops->out(st->priv, USE_EXTRA_VOLT, onoff, 0, NULL, 0);
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}
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static int gp8psk_fe_send_legacy_dish_cmd (struct dvb_frontend* fe, unsigned long sw_cmd)
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{
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struct gp8psk_fe_state *st = fe->demodulator_priv;
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u8 cmd = sw_cmd & 0x7f;
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if (st->ops->out(st->priv, SET_DN_SWITCH, cmd, 0, NULL, 0))
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return -EINVAL;
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if (st->ops->out(st->priv, SET_LNB_VOLTAGE, !!(sw_cmd & 0x80),
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0, NULL, 0))
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return -EINVAL;
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return 0;
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}
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static void gp8psk_fe_release(struct dvb_frontend* fe)
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{
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struct gp8psk_fe_state *st = fe->demodulator_priv;
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kfree(st);
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}
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static const struct dvb_frontend_ops gp8psk_fe_ops;
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struct dvb_frontend *gp8psk_fe_attach(const struct gp8psk_fe_ops *ops,
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void *priv, bool is_rev1)
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{
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struct gp8psk_fe_state *st;
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if (!ops || !ops->in || !ops->out || !ops->reload) {
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pr_err("Error! gp8psk-fe ops not defined.\n");
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return NULL;
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}
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st = kzalloc(sizeof(struct gp8psk_fe_state), GFP_KERNEL);
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if (!st)
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return NULL;
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memcpy(&st->fe.ops, &gp8psk_fe_ops, sizeof(struct dvb_frontend_ops));
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st->fe.demodulator_priv = st;
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st->ops = ops;
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st->priv = priv;
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st->is_rev1 = is_rev1;
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pr_info("Frontend %sattached\n", is_rev1 ? "revision 1 " : "");
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return &st->fe;
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}
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EXPORT_SYMBOL_GPL(gp8psk_fe_attach);
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static const struct dvb_frontend_ops gp8psk_fe_ops = {
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.delsys = { SYS_DVBS },
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.info = {
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.name = "Genpix DVB-S",
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.frequency_min_hz = 800 * MHz,
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.frequency_max_hz = 2250 * MHz,
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.frequency_stepsize_hz = 100 * kHz,
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.symbol_rate_min = 1000000,
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.symbol_rate_max = 45000000,
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.symbol_rate_tolerance = 500, /* ppm */
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.caps = FE_CAN_INVERSION_AUTO |
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FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
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FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
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/*
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* FE_CAN_QAM_16 is for compatibility
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* (Myth incorrectly detects Turbo-QPSK as plain QAM-16)
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*/
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FE_CAN_QPSK | FE_CAN_QAM_16 | FE_CAN_TURBO_FEC
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},
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.release = gp8psk_fe_release,
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.init = NULL,
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.sleep = NULL,
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.set_frontend = gp8psk_fe_set_frontend,
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.get_tune_settings = gp8psk_fe_get_tune_settings,
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.read_status = gp8psk_fe_read_status,
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.read_ber = gp8psk_fe_read_ber,
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.read_signal_strength = gp8psk_fe_read_signal_strength,
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.read_snr = gp8psk_fe_read_snr,
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.read_ucblocks = gp8psk_fe_read_unc_blocks,
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.diseqc_send_master_cmd = gp8psk_fe_send_diseqc_msg,
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.diseqc_send_burst = gp8psk_fe_send_diseqc_burst,
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.set_tone = gp8psk_fe_set_tone,
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.set_voltage = gp8psk_fe_set_voltage,
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.dishnetwork_send_legacy_command = gp8psk_fe_send_legacy_dish_cmd,
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.enable_high_lnb_voltage = gp8psk_fe_enable_high_lnb_voltage
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};
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MODULE_AUTHOR("Alan Nisota <alannisota@gamil.com>");
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MODULE_DESCRIPTION("Frontend Driver for Genpix DVB-S");
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MODULE_VERSION("1.1");
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MODULE_LICENSE("GPL");
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