mirror of https://gitee.com/openkylin/linux.git
273 lines
6.4 KiB
C
273 lines
6.4 KiB
C
/* DVB USB compliant Linux driver for the
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* - GENPIX 8pks/qpsk USB2.0 DVB-S module
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*
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* Copyright (C) 2006 Alan Nisota (alannisota@gmail.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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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation, version 2.
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*
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* see Documentation/dvb/README.dvb-usb for more information
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*/
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#include "gp8psk.h"
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struct gp8psk_fe_state {
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struct dvb_frontend fe;
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struct dvb_usb_device *d;
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u16 snr;
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unsigned long next_snr_check;
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};
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static int gp8psk_fe_read_status(struct dvb_frontend* fe, fe_status_t *status)
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{
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struct gp8psk_fe_state *st = fe->demodulator_priv;
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u8 lock;
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if (gp8psk_usb_in_op(st->d, GET_SIGNAL_LOCK, 0, 0, &lock,1))
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return -EINVAL;
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if (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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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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u8 buf[2];
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if (time_after(jiffies,st->next_snr_check)) {
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gp8psk_usb_in_op(st->d,GET_SIGNAL_STRENGTH,0,0,buf,2);
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*snr = (int)(buf[1]) << 8 | buf[0];
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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 (*snr <= 3855)
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*snr = (*snr<<4) + *snr; // snr * 17
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else
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*snr = 65535;
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st->next_snr_check = jiffies + (10*HZ)/1000;
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} else {
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*snr = st->snr;
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}
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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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return gp8psk_fe_read_snr(fe, strength);
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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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struct dvb_frontend_parameters *fep)
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{
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struct gp8psk_fe_state *state = fe->demodulator_priv;
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u8 cmd[10];
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u32 freq = fep->frequency * 1000;
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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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switch(fe->ops.info.type) {
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case FE_QPSK:
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cmd[0] = fep->u.qpsk.symbol_rate & 0xff;
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cmd[1] = (fep->u.qpsk.symbol_rate >> 8) & 0xff;
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cmd[2] = (fep->u.qpsk.symbol_rate >> 16) & 0xff;
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cmd[3] = (fep->u.qpsk.symbol_rate >> 24) & 0xff;
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cmd[8] = ADV_MOD_DVB_QPSK;
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cmd[9] = 0x03; /*ADV_MOD_FEC_XXX*/
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break;
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default:
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// other modes are unsuported right now
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cmd[0] = 0;
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cmd[1] = 0;
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cmd[2] = 0;
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cmd[3] = 0;
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cmd[8] = 0;
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cmd[9] = 0;
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break;
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}
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gp8psk_usb_out_op(state->d,TUNE_8PSK,0,0,cmd,10);
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state->next_snr_check = jiffies;
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return 0;
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}
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static int gp8psk_fe_get_frontend(struct dvb_frontend* fe,
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struct dvb_frontend_parameters *fep)
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{
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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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deb_fe("%s\n",__FUNCTION__);
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if (gp8psk_usb_out_op(st->d,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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fe_sec_mini_cmd_t 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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deb_fe("%s\n",__FUNCTION__);
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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 (gp8psk_usb_out_op(st->d,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, fe_sec_tone_mode_t tone)
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{
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struct gp8psk_fe_state* state = fe->demodulator_priv;
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if (gp8psk_usb_out_op(state->d,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, fe_sec_voltage_t voltage)
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{
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struct gp8psk_fe_state* state = fe->demodulator_priv;
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if (gp8psk_usb_out_op(state->d,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_send_legacy_dish_cmd (struct dvb_frontend* fe, unsigned long sw_cmd)
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{
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struct gp8psk_fe_state* state = fe->demodulator_priv;
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u8 cmd = sw_cmd & 0x7f;
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if (gp8psk_usb_out_op(state->d,SET_DN_SWITCH, cmd, 0,
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NULL, 0)) {
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return -EINVAL;
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}
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if (gp8psk_usb_out_op(state->d,SET_LNB_VOLTAGE, !!(sw_cmd & 0x80),
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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 void gp8psk_fe_release(struct dvb_frontend* fe)
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{
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struct gp8psk_fe_state *state = fe->demodulator_priv;
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kfree(state);
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}
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static struct dvb_frontend_ops gp8psk_fe_ops;
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struct dvb_frontend * gp8psk_fe_attach(struct dvb_usb_device *d)
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{
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struct gp8psk_fe_state *s = kzalloc(sizeof(struct gp8psk_fe_state), GFP_KERNEL);
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if (s == NULL)
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goto error;
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s->d = d;
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memcpy(&s->fe.ops, &gp8psk_fe_ops, sizeof(struct dvb_frontend_ops));
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s->fe.demodulator_priv = s;
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goto success;
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error:
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return NULL;
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success:
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return &s->fe;
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}
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static struct dvb_frontend_ops gp8psk_fe_ops = {
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.info = {
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.name = "Genpix 8psk-USB DVB-S",
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.type = FE_QPSK,
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.frequency_min = 950000,
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.frequency_max = 2150000,
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.frequency_stepsize = 100,
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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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FE_CAN_QPSK
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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_frontend = gp8psk_fe_get_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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};
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