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linux-next/drivers/media/dvb-frontends/or51211.c
Thomas Gleixner c942fddf87 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157 
Based on 3 normalized pattern(s):

  this program is free software you can redistribute it and or modify
  it under the terms of the gnu general public license as published by
  the free software foundation either version 2 of the license or at
  your option any later version this program is distributed in the
  hope that it will be useful but without any warranty without even
  the implied warranty of merchantability or fitness for a particular
  purpose see the gnu general public license for more details

  this program is free software you can redistribute it and or modify
  it under the terms of the gnu general public license as published by
  the free software foundation either version 2 of the license or at
  your option any later version [author] [kishon] [vijay] [abraham]
  [i] [kishon]@[ti] [com] this program is distributed in the hope that
  it will be useful but without any warranty without even the implied
  warranty of merchantability or fitness for a particular purpose see
  the gnu general public license for more details

  this program is free software you can redistribute it and or modify
  it under the terms of the gnu general public license as published by
  the free software foundation either version 2 of the license or at
  your option any later version [author] [graeme] [gregory]
  [gg]@[slimlogic] [co] [uk] [author] [kishon] [vijay] [abraham] [i]
  [kishon]@[ti] [com] [based] [on] [twl6030]_[usb] [c] [author] [hema]
  [hk] [hemahk]@[ti] [com] this program is distributed in the hope
  that it will be useful but without any warranty without even the
  implied warranty of merchantability or fitness for a particular
  purpose see the gnu general public license for more details

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 1105 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Richard Fontana <rfontana@redhat.com>
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190527070033.202006027@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-30 11:26:37 -07:00

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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Support for OR51211 (pcHDTV HD-2000) - VSB
*
* Copyright (C) 2005 Kirk Lapray <kirk_lapray@bigfoot.com>
*
* Based on code from Jack Kelliher (kelliher@xmission.com)
* Copyright (C) 2002 & pcHDTV, inc.
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": %s: " fmt, __func__
/*
* This driver needs external firmware. Please use the command
* "<kerneldir>/scripts/get_dvb_firmware or51211" to
* download/extract it, and then copy it to /usr/lib/hotplug/firmware
* or /lib/firmware (depending on configuration of firmware hotplug).
*/
#define OR51211_DEFAULT_FIRMWARE "dvb-fe-or51211.fw"
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/device.h>
#include <linux/firmware.h>
#include <linux/string.h>
#include <linux/slab.h>
#include <asm/byteorder.h>
#include <media/dvb_math.h>
#include <media/dvb_frontend.h>
#include "or51211.h"
static int debug;
#define dprintk(args...) \
do { if (debug) pr_debug(args); } while (0)
static u8 run_buf[] = {0x7f,0x01};
static u8 cmd_buf[] = {0x04,0x01,0x50,0x80,0x06}; // ATSC
struct or51211_state {
struct i2c_adapter* i2c;
/* Configuration settings */
const struct or51211_config* config;
struct dvb_frontend frontend;
struct bt878* bt;
/* Demodulator private data */
u8 initialized:1;
u32 snr; /* Result of last SNR calculation */
/* Tuner private data */
u32 current_frequency;
};
static int i2c_writebytes (struct or51211_state* state, u8 reg, const u8 *buf,
int len)
{
int err;
struct i2c_msg msg;
msg.addr = reg;
msg.flags = 0;
msg.len = len;
msg.buf = (u8 *)buf;
if ((err = i2c_transfer (state->i2c, &msg, 1)) != 1) {
pr_warn("error (addr %02x, err == %i)\n", reg, err);
return -EREMOTEIO;
}
return 0;
}
static int i2c_readbytes(struct or51211_state *state, u8 reg, u8 *buf, int len)
{
int err;
struct i2c_msg msg;
msg.addr = reg;
msg.flags = I2C_M_RD;
msg.len = len;
msg.buf = buf;
if ((err = i2c_transfer (state->i2c, &msg, 1)) != 1) {
pr_warn("error (addr %02x, err == %i)\n", reg, err);
return -EREMOTEIO;
}
return 0;
}
static int or51211_load_firmware (struct dvb_frontend* fe,
const struct firmware *fw)
{
struct or51211_state* state = fe->demodulator_priv;
u8 tudata[585];
int i;
dprintk("Firmware is %zu bytes\n", fw->size);
/* Get eprom data */
tudata[0] = 17;
if (i2c_writebytes(state,0x50,tudata,1)) {
pr_warn("error eprom addr\n");
return -1;
}
if (i2c_readbytes(state,0x50,&tudata[145],192)) {
pr_warn("error eprom\n");
return -1;
}
/* Create firmware buffer */
for (i = 0; i < 145; i++)
tudata[i] = fw->data[i];
for (i = 0; i < 248; i++)
tudata[i+337] = fw->data[145+i];
state->config->reset(fe);
if (i2c_writebytes(state,state->config->demod_address,tudata,585)) {
pr_warn("error 1\n");
return -1;
}
msleep(1);
if (i2c_writebytes(state,state->config->demod_address,
&fw->data[393],8125)) {
pr_warn("error 2\n");
return -1;
}
msleep(1);
if (i2c_writebytes(state,state->config->demod_address,run_buf,2)) {
pr_warn("error 3\n");
return -1;
}
/* Wait at least 5 msec */
msleep(10);
if (i2c_writebytes(state,state->config->demod_address,run_buf,2)) {
pr_warn("error 4\n");
return -1;
}
msleep(10);
pr_info("Done.\n");
return 0;
};
static int or51211_setmode(struct dvb_frontend* fe, int mode)
{
struct or51211_state* state = fe->demodulator_priv;
u8 rec_buf[14];
state->config->setmode(fe, mode);
if (i2c_writebytes(state,state->config->demod_address,run_buf,2)) {
pr_warn("error 1\n");
return -1;
}
/* Wait at least 5 msec */
msleep(10);
if (i2c_writebytes(state,state->config->demod_address,run_buf,2)) {
pr_warn("error 2\n");
return -1;
}
msleep(10);
/* 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("error 3\n");
return -1;
}
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("error 5\n");
}
msleep(3);
if (i2c_readbytes(state,state->config->demod_address,&rec_buf[10],2)) {
pr_warn("error 6\n");
return -1;
}
dprintk("rec status %02x %02x\n", rec_buf[10], rec_buf[11]);
return 0;
}
static int or51211_set_parameters(struct dvb_frontend *fe)
{
struct dtv_frontend_properties *p = &fe->dtv_property_cache;
struct or51211_state* state = fe->demodulator_priv;
/* Change only if we are actually changing the channel */
if (state->current_frequency != p->frequency) {
if (fe->ops.tuner_ops.set_params) {
fe->ops.tuner_ops.set_params(fe);
if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 0);
}
/* Set to ATSC mode */
or51211_setmode(fe,0);
/* Update current frequency */
state->current_frequency = p->frequency;
}
return 0;
}
static int or51211_read_status(struct dvb_frontend *fe, enum fe_status *status)
{
struct or51211_state* state = fe->demodulator_priv;
unsigned char rec_buf[2];
unsigned char snd_buf[] = {0x04,0x00,0x03,0x00};
*status = 0;
/* Receiver Status */
if (i2c_writebytes(state,state->config->demod_address,snd_buf,3)) {
pr_warn("write error\n");
return -1;
}
msleep(3);
if (i2c_readbytes(state,state->config->demod_address,rec_buf,2)) {
pr_warn("read error\n");
return -1;
}
dprintk("%x %x\n", rec_buf[0], rec_buf[1]);
if (rec_buf[0] & 0x01) { /* Receiver Lock */
*status |= FE_HAS_SIGNAL;
*status |= FE_HAS_CARRIER;
*status |= FE_HAS_VITERBI;
*status |= FE_HAS_SYNC;
*status |= FE_HAS_LOCK;
}
return 0;
}
/* Calculate SNR estimation (scaled by 2^24)
8-VSB SNR equation from Oren datasheets
For 8-VSB:
SNR[dB] = 10 * log10(219037.9454 / MSE^2 )
We re-write the snr equation as:
SNR * 2^24 = 10*(c - 2*intlog10(MSE))
Where for 8-VSB, c = log10(219037.9454) * 2^24 */
static u32 calculate_snr(u32 mse, u32 c)
{
if (mse == 0) /* No signal */
return 0;
mse = 2*intlog10(mse);
if (mse > c) {
/* Negative SNR, which is possible, but realisticly the
demod will lose lock before the signal gets this bad. The
API only allows for unsigned values, so just return 0 */
return 0;
}
return 10*(c - mse);
}
static int or51211_read_snr(struct dvb_frontend* fe, u16* snr)
{
struct or51211_state* state = fe->demodulator_priv;
u8 rec_buf[2];
u8 snd_buf[3];
/* SNR after Equalizer */
snd_buf[0] = 0x04;
snd_buf[1] = 0x00;
snd_buf[2] = 0x04;
if (i2c_writebytes(state,state->config->demod_address,snd_buf,3)) {
pr_warn("error writing snr reg\n");
return -1;
}
if (i2c_readbytes(state,state->config->demod_address,rec_buf,2)) {
pr_warn("read_status read error\n");
return -1;
}
state->snr = calculate_snr(rec_buf[0], 89599047);
*snr = (state->snr) >> 16;
dprintk("noise = 0x%02x, snr = %d.%02d dB\n", rec_buf[0],
state->snr >> 24, (((state->snr>>8) & 0xffff) * 100) >> 16);
return 0;
}
static int or51211_read_signal_strength(struct dvb_frontend* fe, u16* strength)
{
/* Calculate Strength from SNR up to 35dB */
/* Even though the SNR can go higher than 35dB, there is some comfort */
/* factor in having a range of strong signals that can show at 100% */
struct or51211_state* state = (struct or51211_state*)fe->demodulator_priv;
u16 snr;
int ret;
ret = fe->ops.read_snr(fe, &snr);
if (ret != 0)
return ret;
/* Rather than use the 8.8 value snr, use state->snr which is 8.24 */
/* scale the range 0 - 35*2^24 into 0 - 65535 */
if (state->snr >= 8960 * 0x10000)
*strength = 0xffff;
else
*strength = state->snr / 8960;
return 0;
}
static int or51211_read_ber(struct dvb_frontend* fe, u32* ber)
{
*ber = -ENOSYS;
return 0;
}
static int or51211_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks)
{
*ucblocks = -ENOSYS;
return 0;
}
static int or51211_sleep(struct dvb_frontend* fe)
{
return 0;
}
static int or51211_init(struct dvb_frontend* fe)
{
struct or51211_state* state = fe->demodulator_priv;
const struct or51211_config* config = state->config;
const struct firmware* fw;
unsigned char get_ver_buf[] = {0x04,0x00,0x30,0x00,0x00};
unsigned char rec_buf[14];
int ret,i;
if (!state->initialized) {
/* Request the firmware, this will block until it uploads */
pr_info("Waiting for firmware upload (%s)...\n",
OR51211_DEFAULT_FIRMWARE);
ret = config->request_firmware(fe, &fw,
OR51211_DEFAULT_FIRMWARE);
pr_info("Got Hotplug firmware\n");
if (ret) {
pr_warn("No firmware uploaded (timeout or file not found?)\n");
return ret;
}
ret = or51211_load_firmware(fe, fw);
release_firmware(fw);
if (ret) {
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);
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