556 lines
13 KiB
C
556 lines
13 KiB
C
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// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Support for OR51211 (pcHDTV HD-2000) - VSB
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*
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* Copyright (C) 2005 Kirk Lapray <kirk_lapray@bigfoot.com>
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*
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* Based on code from Jack Kelliher (kelliher@xmission.com)
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* Copyright (C) 2002 & pcHDTV, inc.
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": %s: " fmt, __func__
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/*
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* This driver needs external firmware. Please use the command
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* "<kerneldir>/scripts/get_dvb_firmware or51211" to
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* download/extract it, and then copy it to /usr/lib/hotplug/firmware
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* or /lib/firmware (depending on configuration of firmware hotplug).
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*/
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#define OR51211_DEFAULT_FIRMWARE "dvb-fe-or51211.fw"
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/device.h>
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#include <linux/firmware.h>
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#include <linux/string.h>
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#include <linux/slab.h>
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#include <asm/byteorder.h>
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#include <media/dvb_math.h>
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#include <media/dvb_frontend.h>
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#include "or51211.h"
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static int debug;
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#define dprintk(args...) \
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do { if (debug) pr_debug(args); } while (0)
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static u8 run_buf[] = {0x7f,0x01};
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static u8 cmd_buf[] = {0x04,0x01,0x50,0x80,0x06}; // ATSC
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struct or51211_state {
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struct i2c_adapter* i2c;
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/* Configuration settings */
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const struct or51211_config* config;
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struct dvb_frontend frontend;
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struct bt878* bt;
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/* Demodulator private data */
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u8 initialized:1;
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u32 snr; /* Result of last SNR calculation */
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/* Tuner private data */
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u32 current_frequency;
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};
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static int i2c_writebytes (struct or51211_state* state, u8 reg, const u8 *buf,
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int len)
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{
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int err;
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struct i2c_msg msg;
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msg.addr = reg;
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msg.flags = 0;
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msg.len = len;
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msg.buf = (u8 *)buf;
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if ((err = i2c_transfer (state->i2c, &msg, 1)) != 1) {
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pr_warn("error (addr %02x, err == %i)\n", reg, err);
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return -EREMOTEIO;
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}
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return 0;
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}
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static int i2c_readbytes(struct or51211_state *state, u8 reg, u8 *buf, int len)
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{
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int err;
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struct i2c_msg msg;
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msg.addr = reg;
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msg.flags = I2C_M_RD;
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msg.len = len;
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msg.buf = buf;
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if ((err = i2c_transfer (state->i2c, &msg, 1)) != 1) {
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pr_warn("error (addr %02x, err == %i)\n", reg, err);
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return -EREMOTEIO;
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}
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return 0;
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}
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static int or51211_load_firmware (struct dvb_frontend* fe,
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const struct firmware *fw)
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{
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struct or51211_state* state = fe->demodulator_priv;
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u8 tudata[585];
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int i;
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dprintk("Firmware is %zu bytes\n", fw->size);
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/* Get eprom data */
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tudata[0] = 17;
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if (i2c_writebytes(state,0x50,tudata,1)) {
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pr_warn("error eprom addr\n");
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return -1;
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}
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if (i2c_readbytes(state,0x50,&tudata[145],192)) {
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pr_warn("error eprom\n");
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return -1;
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}
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/* Create firmware buffer */
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for (i = 0; i < 145; i++)
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tudata[i] = fw->data[i];
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for (i = 0; i < 248; i++)
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tudata[i+337] = fw->data[145+i];
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state->config->reset(fe);
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if (i2c_writebytes(state,state->config->demod_address,tudata,585)) {
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pr_warn("error 1\n");
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return -1;
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}
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msleep(1);
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if (i2c_writebytes(state,state->config->demod_address,
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&fw->data[393],8125)) {
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pr_warn("error 2\n");
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return -1;
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}
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msleep(1);
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if (i2c_writebytes(state,state->config->demod_address,run_buf,2)) {
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pr_warn("error 3\n");
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return -1;
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}
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/* Wait at least 5 msec */
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msleep(10);
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if (i2c_writebytes(state,state->config->demod_address,run_buf,2)) {
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pr_warn("error 4\n");
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return -1;
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}
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msleep(10);
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pr_info("Done.\n");
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return 0;
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};
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static int or51211_setmode(struct dvb_frontend* fe, int mode)
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{
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struct or51211_state* state = fe->demodulator_priv;
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u8 rec_buf[14];
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state->config->setmode(fe, mode);
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if (i2c_writebytes(state,state->config->demod_address,run_buf,2)) {
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pr_warn("error 1\n");
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return -1;
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}
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/* Wait at least 5 msec */
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msleep(10);
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if (i2c_writebytes(state,state->config->demod_address,run_buf,2)) {
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pr_warn("error 2\n");
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return -1;
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}
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msleep(10);
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/* Set operation mode in Receiver 1 register;
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* type 1:
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* data 0x50h Automatic sets receiver channel conditions
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* Automatic NTSC rejection filter
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* Enable MPEG serial data output
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* MPEG2tr
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* High tuner phase noise
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* normal +/-150kHz Carrier acquisition range
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*/
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if (i2c_writebytes(state,state->config->demod_address,cmd_buf,3)) {
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pr_warn("error 3\n");
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return -1;
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}
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rec_buf[0] = 0x04;
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rec_buf[1] = 0x00;
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rec_buf[2] = 0x03;
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rec_buf[3] = 0x00;
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msleep(20);
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if (i2c_writebytes(state,state->config->demod_address,rec_buf,3)) {
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pr_warn("error 5\n");
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}
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msleep(3);
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if (i2c_readbytes(state,state->config->demod_address,&rec_buf[10],2)) {
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pr_warn("error 6\n");
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return -1;
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}
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dprintk("rec status %02x %02x\n", rec_buf[10], rec_buf[11]);
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return 0;
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}
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static int or51211_set_parameters(struct dvb_frontend *fe)
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{
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struct dtv_frontend_properties *p = &fe->dtv_property_cache;
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struct or51211_state* state = fe->demodulator_priv;
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/* Change only if we are actually changing the channel */
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if (state->current_frequency != p->frequency) {
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if (fe->ops.tuner_ops.set_params) {
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fe->ops.tuner_ops.set_params(fe);
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if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 0);
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}
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/* Set to ATSC mode */
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or51211_setmode(fe,0);
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/* Update current frequency */
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state->current_frequency = p->frequency;
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}
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return 0;
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}
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static int or51211_read_status(struct dvb_frontend *fe, enum fe_status *status)
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{
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struct or51211_state* state = fe->demodulator_priv;
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unsigned char rec_buf[2];
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unsigned char snd_buf[] = {0x04,0x00,0x03,0x00};
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*status = 0;
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/* Receiver Status */
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if (i2c_writebytes(state,state->config->demod_address,snd_buf,3)) {
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pr_warn("write error\n");
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return -1;
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}
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msleep(3);
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if (i2c_readbytes(state,state->config->demod_address,rec_buf,2)) {
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pr_warn("read error\n");
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return -1;
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}
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dprintk("%x %x\n", rec_buf[0], rec_buf[1]);
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if (rec_buf[0] & 0x01) { /* Receiver Lock */
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*status |= FE_HAS_SIGNAL;
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*status |= FE_HAS_CARRIER;
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*status |= FE_HAS_VITERBI;
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*status |= FE_HAS_SYNC;
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*status |= FE_HAS_LOCK;
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}
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return 0;
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}
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/* Calculate SNR estimation (scaled by 2^24)
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8-VSB SNR equation from Oren datasheets
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For 8-VSB:
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SNR[dB] = 10 * log10(219037.9454 / MSE^2 )
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We re-write the snr equation as:
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SNR * 2^24 = 10*(c - 2*intlog10(MSE))
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Where for 8-VSB, c = log10(219037.9454) * 2^24 */
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static u32 calculate_snr(u32 mse, u32 c)
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{
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if (mse == 0) /* No signal */
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return 0;
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mse = 2*intlog10(mse);
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if (mse > c) {
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/* Negative SNR, which is possible, but realisticly the
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demod will lose lock before the signal gets this bad. The
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API only allows for unsigned values, so just return 0 */
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return 0;
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}
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return 10*(c - mse);
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}
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static int or51211_read_snr(struct dvb_frontend* fe, u16* snr)
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{
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struct or51211_state* state = fe->demodulator_priv;
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u8 rec_buf[2];
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u8 snd_buf[3];
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/* SNR after Equalizer */
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snd_buf[0] = 0x04;
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snd_buf[1] = 0x00;
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snd_buf[2] = 0x04;
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if (i2c_writebytes(state,state->config->demod_address,snd_buf,3)) {
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pr_warn("error writing snr reg\n");
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return -1;
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}
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if (i2c_readbytes(state,state->config->demod_address,rec_buf,2)) {
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pr_warn("read_status read error\n");
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return -1;
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}
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state->snr = calculate_snr(rec_buf[0], 89599047);
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*snr = (state->snr) >> 16;
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dprintk("noise = 0x%02x, snr = %d.%02d dB\n", rec_buf[0],
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state->snr >> 24, (((state->snr>>8) & 0xffff) * 100) >> 16);
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return 0;
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}
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static int or51211_read_signal_strength(struct dvb_frontend* fe, u16* strength)
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{
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/* Calculate Strength from SNR up to 35dB */
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/* Even though the SNR can go higher than 35dB, there is some comfort */
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/* factor in having a range of strong signals that can show at 100% */
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struct or51211_state* state = (struct or51211_state*)fe->demodulator_priv;
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u16 snr;
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int ret;
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ret = fe->ops.read_snr(fe, &snr);
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if (ret != 0)
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return ret;
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/* Rather than use the 8.8 value snr, use state->snr which is 8.24 */
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/* scale the range 0 - 35*2^24 into 0 - 65535 */
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if (state->snr >= 8960 * 0x10000)
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*strength = 0xffff;
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else
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*strength = state->snr / 8960;
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return 0;
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}
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static int or51211_read_ber(struct dvb_frontend* fe, u32* ber)
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{
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*ber = -ENOSYS;
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return 0;
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}
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static int or51211_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks)
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{
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*ucblocks = -ENOSYS;
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return 0;
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}
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static int or51211_sleep(struct dvb_frontend* fe)
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{
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return 0;
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}
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static int or51211_init(struct dvb_frontend* fe)
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{
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struct or51211_state* state = fe->demodulator_priv;
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const struct or51211_config* config = state->config;
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const struct firmware* fw;
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unsigned char get_ver_buf[] = {0x04,0x00,0x30,0x00,0x00};
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unsigned char rec_buf[14];
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int ret,i;
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if (!state->initialized) {
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/* Request the firmware, this will block until it uploads */
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pr_info("Waiting for firmware upload (%s)...\n",
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OR51211_DEFAULT_FIRMWARE);
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ret = config->request_firmware(fe, &fw,
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OR51211_DEFAULT_FIRMWARE);
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pr_info("Got Hotplug firmware\n");
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if (ret) {
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pr_warn("No firmware uploaded (timeout or file not found?)\n");
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return ret;
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}
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ret = or51211_load_firmware(fe, fw);
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release_firmware(fw);
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if (ret) {
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pr_warn("Writing firmware to device failed!\n");
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
pr_info("Firmware upload complete.\n");
|
||
|
|
|
||
|
|
/* Set operation mode in Receiver 1 register;
|
||
|
|
* type 1:
|
||
|
|
* data 0x50h Automatic sets receiver channel conditions
|
||
|
|
* Automatic NTSC rejection filter
|
||
|
|
* Enable MPEG serial data output
|
||
|
|
* MPEG2tr
|
||
|
|
* High tuner phase noise
|
||
|
|
* normal +/-150kHz Carrier acquisition range
|
||
|
|
*/
|
||
|
|
if (i2c_writebytes(state,state->config->demod_address,
|
||
|
|
cmd_buf,3)) {
|
||
|
|
pr_warn("Load DVR Error 5\n");
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Read back ucode version to besure we loaded correctly */
|
||
|
|
/* and are really up and running */
|
||
|
|
rec_buf[0] = 0x04;
|
||
|
|
rec_buf[1] = 0x00;
|
||
|
|
rec_buf[2] = 0x03;
|
||
|
|
rec_buf[3] = 0x00;
|
||
|
|
msleep(30);
|
||
|
|
if (i2c_writebytes(state,state->config->demod_address,
|
||
|
|
rec_buf,3)) {
|
||
|
|
pr_warn("Load DVR Error A\n");
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
msleep(3);
|
||
|
|
if (i2c_readbytes(state,state->config->demod_address,
|
||
|
|
&rec_buf[10],2)) {
|
||
|
|
pr_warn("Load DVR Error B\n");
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
|
||
|
|
rec_buf[0] = 0x04;
|
||
|
|
rec_buf[1] = 0x00;
|
||
|
|
rec_buf[2] = 0x01;
|
||
|
|
rec_buf[3] = 0x00;
|
||
|
|
msleep(20);
|
||
|
|
if (i2c_writebytes(state,state->config->demod_address,
|
||
|
|
rec_buf,3)) {
|
||
|
|
pr_warn("Load DVR Error C\n");
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
msleep(3);
|
||
|
|
if (i2c_readbytes(state,state->config->demod_address,
|
||
|
|
&rec_buf[12],2)) {
|
||
|
|
pr_warn("Load DVR Error D\n");
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
|
||
|
|
for (i = 0; i < 8; i++)
|
||
|
|
rec_buf[i]=0xed;
|
||
|
|
|
||
|
|
for (i = 0; i < 5; i++) {
|
||
|
|
msleep(30);
|
||
|
|
get_ver_buf[4] = i+1;
|
||
|
|
if (i2c_writebytes(state,state->config->demod_address,
|
||
|
|
get_ver_buf,5)) {
|
||
|
|
pr_warn("Load DVR Error 6 - %d\n", i);
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
msleep(3);
|
||
|
|
|
||
|
|
if (i2c_readbytes(state,state->config->demod_address,
|
||
|
|
&rec_buf[i*2],2)) {
|
||
|
|
pr_warn("Load DVR Error 7 - %d\n", i);
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
/* If we didn't receive the right index, try again */
|
||
|
|
if ((int)rec_buf[i*2+1]!=i+1){
|
||
|
|
i--;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
dprintk("read_fwbits %10ph\n", rec_buf);
|
||
|
|
|
||
|
|
pr_info("ver TU%02x%02x%02x VSB mode %02x Status %02x\n",
|
||
|
|
rec_buf[2], rec_buf[4], rec_buf[6], rec_buf[12],
|
||
|
|
rec_buf[10]);
|
||
|
|
|
||
|
|
rec_buf[0] = 0x04;
|
||
|
|
rec_buf[1] = 0x00;
|
||
|
|
rec_buf[2] = 0x03;
|
||
|
|
rec_buf[3] = 0x00;
|
||
|
|
msleep(20);
|
||
|
|
if (i2c_writebytes(state,state->config->demod_address,
|
||
|
|
rec_buf,3)) {
|
||
|
|
pr_warn("Load DVR Error 8\n");
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
msleep(20);
|
||
|
|
if (i2c_readbytes(state,state->config->demod_address,
|
||
|
|
&rec_buf[8],2)) {
|
||
|
|
pr_warn("Load DVR Error 9\n");
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
state->initialized = 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int or51211_get_tune_settings(struct dvb_frontend* fe,
|
||
|
|
struct dvb_frontend_tune_settings* fesettings)
|
||
|
|
{
|
||
|
|
fesettings->min_delay_ms = 500;
|
||
|
|
fesettings->step_size = 0;
|
||
|
|
fesettings->max_drift = 0;
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void or51211_release(struct dvb_frontend* fe)
|
||
|
|
{
|
||
|
|
struct or51211_state* state = fe->demodulator_priv;
|
||
|
|
state->config->sleep(fe);
|
||
|
|
kfree(state);
|
||
|
|
}
|
||
|
|
|
||
|
|
static const struct dvb_frontend_ops or51211_ops;
|
||
|
|
|
||
|
|
struct dvb_frontend* or51211_attach(const struct or51211_config* config,
|
||
|
|
struct i2c_adapter* i2c)
|
||
|
|
{
|
||
|
|
struct or51211_state* state = NULL;
|
||
|
|
|
||
|
|
/* Allocate memory for the internal state */
|
||
|
|
state = kzalloc(sizeof(struct or51211_state), GFP_KERNEL);
|
||
|
|
if (state == NULL)
|
||
|
|
return NULL;
|
||
|
|
|
||
|
|
/* Setup the state */
|
||
|
|
state->config = config;
|
||
|
|
state->i2c = i2c;
|
||
|
|
state->initialized = 0;
|
||
|
|
state->current_frequency = 0;
|
||
|
|
|
||
|
|
/* Create dvb_frontend */
|
||
|
|
memcpy(&state->frontend.ops, &or51211_ops, sizeof(struct dvb_frontend_ops));
|
||
|
|
state->frontend.demodulator_priv = state;
|
||
|
|
return &state->frontend;
|
||
|
|
}
|
||
|
|
|
||
|
|
static const struct dvb_frontend_ops or51211_ops = {
|
||
|
|
.delsys = { SYS_ATSC, SYS_DVBC_ANNEX_B },
|
||
|
|
.info = {
|
||
|
|
.name = "Oren OR51211 VSB Frontend",
|
||
|
|
.frequency_min_hz = 44 * MHz,
|
||
|
|
.frequency_max_hz = 958 * MHz,
|
||
|
|
.frequency_stepsize_hz = 166666,
|
||
|
|
.caps = 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_8VSB
|
||
|
|
},
|
||
|
|
|
||
|
|
.release = or51211_release,
|
||
|
|
|
||
|
|
.init = or51211_init,
|
||
|
|
.sleep = or51211_sleep,
|
||
|
|
|
||
|
|
.set_frontend = or51211_set_parameters,
|
||
|
|
.get_tune_settings = or51211_get_tune_settings,
|
||
|
|
|
||
|
|
.read_status = or51211_read_status,
|
||
|
|
.read_ber = or51211_read_ber,
|
||
|
|
.read_signal_strength = or51211_read_signal_strength,
|
||
|
|
.read_snr = or51211_read_snr,
|
||
|
|
.read_ucblocks = or51211_read_ucblocks,
|
||
|
|
};
|
||
|
|
|
||
|
|
module_param(debug, int, 0644);
|
||
|
|
MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
|
||
|
|
|
||
|
|
MODULE_DESCRIPTION("Oren OR51211 VSB [pcHDTV HD-2000] Demodulator Driver");
|
||
|
|
MODULE_AUTHOR("Kirk Lapray");
|
||
|
|
MODULE_LICENSE("GPL");
|
||
|
|
|
||
|
|
EXPORT_SYMBOL(or51211_attach);
|
||
|
|
|