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linux/drivers/media/dvb-frontends/lgs8gxx.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

1052 lines
23 KiB
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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Support for Legend Silicon GB20600 (a.k.a DMB-TH) demodulator
* LGS8913, LGS8GL5, LGS8G75
* experimental support LGS8G42, LGS8G52
*
* Copyright (C) 2007-2009 David T.L. Wong <davidtlwong@gmail.com>
* Copyright (C) 2008 Sirius International (Hong Kong) Limited
* Timothy Lee <timothy.lee@siriushk.com> (for initial work on LGS8GL5)
*/
#include <asm/div64.h>
#include <linux/firmware.h>
#include <media/dvb_frontend.h>
#include "lgs8gxx.h"
#include "lgs8gxx_priv.h"
#define dprintk(args...) \
do { \
if (debug) \
printk(KERN_DEBUG "lgs8gxx: " args); \
} while (0)
static int debug;
static int fake_signal_str = 1;
#define LGS8GXX_FIRMWARE "lgs8g75.fw"
module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
module_param(fake_signal_str, int, 0644);
MODULE_PARM_DESC(fake_signal_str, "fake signal strength for LGS8913."
"Signal strength calculation is slow.(default:on).");
/* LGS8GXX internal helper functions */
static int lgs8gxx_write_reg(struct lgs8gxx_state *priv, u8 reg, u8 data)
{
int ret;
u8 buf[] = { reg, data };
struct i2c_msg msg = { .flags = 0, .buf = buf, .len = 2 };
msg.addr = priv->config->demod_address;
if (priv->config->prod != LGS8GXX_PROD_LGS8G75 && reg >= 0xC0)
msg.addr += 0x02;
if (debug >= 2)
dprintk("%s: reg=0x%02X, data=0x%02X\n", __func__, reg, data);
ret = i2c_transfer(priv->i2c, &msg, 1);
if (ret != 1)
dprintk("%s: error reg=0x%x, data=0x%x, ret=%i\n",
__func__, reg, data, ret);
return (ret != 1) ? -1 : 0;
}
static int lgs8gxx_read_reg(struct lgs8gxx_state *priv, u8 reg, u8 *p_data)
{
int ret;
u8 dev_addr;
u8 b0[] = { reg };
u8 b1[] = { 0 };
struct i2c_msg msg[] = {
{ .flags = 0, .buf = b0, .len = 1 },
{ .flags = I2C_M_RD, .buf = b1, .len = 1 },
};
dev_addr = priv->config->demod_address;
if (priv->config->prod != LGS8GXX_PROD_LGS8G75 && reg >= 0xC0)
dev_addr += 0x02;
msg[1].addr = msg[0].addr = dev_addr;
ret = i2c_transfer(priv->i2c, msg, 2);
if (ret != 2) {
dprintk("%s: error reg=0x%x, ret=%i\n", __func__, reg, ret);
return -1;
}
*p_data = b1[0];
if (debug >= 2)
dprintk("%s: reg=0x%02X, data=0x%02X\n", __func__, reg, b1[0]);
return 0;
}
static int lgs8gxx_soft_reset(struct lgs8gxx_state *priv)
{
lgs8gxx_write_reg(priv, 0x02, 0x00);
msleep(1);
lgs8gxx_write_reg(priv, 0x02, 0x01);
msleep(100);
return 0;
}
static int wait_reg_mask(struct lgs8gxx_state *priv, u8 reg, u8 mask,
u8 val, u8 delay, u8 tries)
{
u8 t;
int i;
for (i = 0; i < tries; i++) {
lgs8gxx_read_reg(priv, reg, &t);
if ((t & mask) == val)
return 0;
msleep(delay);
}
return 1;
}
static int lgs8gxx_set_ad_mode(struct lgs8gxx_state *priv)
{
const struct lgs8gxx_config *config = priv->config;
u8 if_conf;
if_conf = 0x10; /* AGC output on, RF_AGC output off; */
if_conf |=
((config->ext_adc) ? 0x80 : 0x00) |
((config->if_neg_center) ? 0x04 : 0x00) |
((config->if_freq == 0) ? 0x08 : 0x00) | /* Baseband */
((config->adc_signed) ? 0x02 : 0x00) |
((config->if_neg_edge) ? 0x01 : 0x00);
if (config->ext_adc &&
(config->prod == LGS8GXX_PROD_LGS8G52)) {
lgs8gxx_write_reg(priv, 0xBA, 0x40);
}
lgs8gxx_write_reg(priv, 0x07, if_conf);
return 0;
}
static int lgs8gxx_set_if_freq(struct lgs8gxx_state *priv, u32 freq /*in kHz*/)
{
u64 val;
u32 v32;
u32 if_clk;
if_clk = priv->config->if_clk_freq;
val = freq;
if (freq != 0) {
val <<= 32;
if (if_clk != 0)
do_div(val, if_clk);
v32 = val & 0xFFFFFFFF;
dprintk("Set IF Freq to %dkHz\n", freq);
} else {
v32 = 0;
dprintk("Set IF Freq to baseband\n");
}
dprintk("AFC_INIT_FREQ = 0x%08X\n", v32);
if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
lgs8gxx_write_reg(priv, 0x08, 0xFF & (v32));
lgs8gxx_write_reg(priv, 0x09, 0xFF & (v32 >> 8));
lgs8gxx_write_reg(priv, 0x0A, 0xFF & (v32 >> 16));
lgs8gxx_write_reg(priv, 0x0B, 0xFF & (v32 >> 24));
} else {
lgs8gxx_write_reg(priv, 0x09, 0xFF & (v32));
lgs8gxx_write_reg(priv, 0x0A, 0xFF & (v32 >> 8));
lgs8gxx_write_reg(priv, 0x0B, 0xFF & (v32 >> 16));
lgs8gxx_write_reg(priv, 0x0C, 0xFF & (v32 >> 24));
}
return 0;
}
static int lgs8gxx_get_afc_phase(struct lgs8gxx_state *priv)
{
u64 val;
u32 v32 = 0;
u8 reg_addr, t;
int i;
if (priv->config->prod == LGS8GXX_PROD_LGS8G75)
reg_addr = 0x23;
else
reg_addr = 0x48;
for (i = 0; i < 4; i++) {
lgs8gxx_read_reg(priv, reg_addr, &t);
v32 <<= 8;
v32 |= t;
reg_addr--;
}
val = v32;
val *= priv->config->if_clk_freq;
val >>= 32;
dprintk("AFC = %u kHz\n", (u32)val);
return 0;
}
static int lgs8gxx_set_mode_auto(struct lgs8gxx_state *priv)
{
u8 t;
u8 prod = priv->config->prod;
if (prod == LGS8GXX_PROD_LGS8913)
lgs8gxx_write_reg(priv, 0xC6, 0x01);
if (prod == LGS8GXX_PROD_LGS8G75) {
lgs8gxx_read_reg(priv, 0x0C, &t);
t &= (~0x04);
lgs8gxx_write_reg(priv, 0x0C, t | 0x80);
lgs8gxx_write_reg(priv, 0x39, 0x00);
lgs8gxx_write_reg(priv, 0x3D, 0x04);
} else if (prod == LGS8GXX_PROD_LGS8913 ||
prod == LGS8GXX_PROD_LGS8GL5 ||
prod == LGS8GXX_PROD_LGS8G42 ||
prod == LGS8GXX_PROD_LGS8G52 ||
prod == LGS8GXX_PROD_LGS8G54) {
lgs8gxx_read_reg(priv, 0x7E, &t);
lgs8gxx_write_reg(priv, 0x7E, t | 0x01);
/* clear FEC self reset */
lgs8gxx_read_reg(priv, 0xC5, &t);
lgs8gxx_write_reg(priv, 0xC5, t & 0xE0);
}
if (prod == LGS8GXX_PROD_LGS8913) {
/* FEC auto detect */
lgs8gxx_write_reg(priv, 0xC1, 0x03);
lgs8gxx_read_reg(priv, 0x7C, &t);
t = (t & 0x8C) | 0x03;
lgs8gxx_write_reg(priv, 0x7C, t);
/* BER test mode */
lgs8gxx_read_reg(priv, 0xC3, &t);
t = (t & 0xEF) | 0x10;
lgs8gxx_write_reg(priv, 0xC3, t);
}
if (priv->config->prod == LGS8GXX_PROD_LGS8G52)
lgs8gxx_write_reg(priv, 0xD9, 0x40);
return 0;
}
static int lgs8gxx_set_mode_manual(struct lgs8gxx_state *priv)
{
u8 t;
if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
u8 t2;
lgs8gxx_read_reg(priv, 0x0C, &t);
t &= (~0x80);
lgs8gxx_write_reg(priv, 0x0C, t);
lgs8gxx_read_reg(priv, 0x0C, &t);
lgs8gxx_read_reg(priv, 0x19, &t2);
if (((t&0x03) == 0x01) && (t2&0x01)) {
lgs8gxx_write_reg(priv, 0x6E, 0x05);
lgs8gxx_write_reg(priv, 0x39, 0x02);
lgs8gxx_write_reg(priv, 0x39, 0x03);
lgs8gxx_write_reg(priv, 0x3D, 0x05);
lgs8gxx_write_reg(priv, 0x3E, 0x28);
lgs8gxx_write_reg(priv, 0x53, 0x80);
} else {
lgs8gxx_write_reg(priv, 0x6E, 0x3F);
lgs8gxx_write_reg(priv, 0x39, 0x00);
lgs8gxx_write_reg(priv, 0x3D, 0x04);
}
lgs8gxx_soft_reset(priv);
return 0;
}
/* turn off auto-detect; manual settings */
lgs8gxx_write_reg(priv, 0x7E, 0);
if (priv->config->prod == LGS8GXX_PROD_LGS8913)
lgs8gxx_write_reg(priv, 0xC1, 0);
lgs8gxx_read_reg(priv, 0xC5, &t);
t = (t & 0xE0) | 0x06;
lgs8gxx_write_reg(priv, 0xC5, t);
lgs8gxx_soft_reset(priv);
return 0;
}
static int lgs8gxx_is_locked(struct lgs8gxx_state *priv, u8 *locked)
{
int ret = 0;
u8 t;
if (priv->config->prod == LGS8GXX_PROD_LGS8G75)
ret = lgs8gxx_read_reg(priv, 0x13, &t);
else
ret = lgs8gxx_read_reg(priv, 0x4B, &t);
if (ret != 0)
return ret;
if (priv->config->prod == LGS8GXX_PROD_LGS8G75)
*locked = ((t & 0x80) == 0x80) ? 1 : 0;
else
*locked = ((t & 0xC0) == 0xC0) ? 1 : 0;
return 0;
}
/* Wait for Code Acquisition Lock */
static int lgs8gxx_wait_ca_lock(struct lgs8gxx_state *priv, u8 *locked)
{
int ret = 0;
u8 reg, mask, val;
if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
reg = 0x13;
mask = 0x80;
val = 0x80;
} else {
reg = 0x4B;
mask = 0xC0;
val = 0xC0;
}
ret = wait_reg_mask(priv, reg, mask, val, 50, 40);
*locked = (ret == 0) ? 1 : 0;
return 0;
}
static int lgs8gxx_is_autodetect_finished(struct lgs8gxx_state *priv,
u8 *finished)
{
int ret = 0;
u8 reg, mask, val;
if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
reg = 0x1f;
mask = 0xC0;
val = 0x80;
} else {
reg = 0xA4;
mask = 0x03;
val = 0x01;
}
ret = wait_reg_mask(priv, reg, mask, val, 10, 20);
*finished = (ret == 0) ? 1 : 0;
return 0;
}
static int lgs8gxx_autolock_gi(struct lgs8gxx_state *priv, u8 gi, u8 cpn,
u8 *locked)
{
int err = 0;
u8 ad_fini = 0;
u8 t1, t2;
if (gi == GI_945)
dprintk("try GI 945\n");
else if (gi == GI_595)
dprintk("try GI 595\n");
else if (gi == GI_420)
dprintk("try GI 420\n");
if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
lgs8gxx_read_reg(priv, 0x0C, &t1);
lgs8gxx_read_reg(priv, 0x18, &t2);
t1 &= ~(GI_MASK);
t1 |= gi;
t2 &= 0xFE;
t2 |= cpn ? 0x01 : 0x00;
lgs8gxx_write_reg(priv, 0x0C, t1);
lgs8gxx_write_reg(priv, 0x18, t2);
} else {
lgs8gxx_write_reg(priv, 0x04, gi);
}
lgs8gxx_soft_reset(priv);
err = lgs8gxx_wait_ca_lock(priv, locked);
if (err || !(*locked))
return err;
err = lgs8gxx_is_autodetect_finished(priv, &ad_fini);
if (err != 0)
return err;
if (ad_fini) {
dprintk("auto detect finished\n");
} else
*locked = 0;
return 0;
}
static int lgs8gxx_auto_detect(struct lgs8gxx_state *priv,
u8 *detected_param, u8 *gi)
{
int i, j;
int err = 0;
u8 locked = 0, tmp_gi;
dprintk("%s\n", __func__);
lgs8gxx_set_mode_auto(priv);
if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
lgs8gxx_write_reg(priv, 0x67, 0xAA);
lgs8gxx_write_reg(priv, 0x6E, 0x3F);
} else {
/* Guard Interval */
lgs8gxx_write_reg(priv, 0x03, 00);
}
for (i = 0; i < 2; i++) {
for (j = 0; j < 2; j++) {
tmp_gi = GI_945;
err = lgs8gxx_autolock_gi(priv, GI_945, j, &locked);
if (err)
goto out;
if (locked)
goto locked;
}
for (j = 0; j < 2; j++) {
tmp_gi = GI_420;
err = lgs8gxx_autolock_gi(priv, GI_420, j, &locked);
if (err)
goto out;
if (locked)
goto locked;
}
tmp_gi = GI_595;
err = lgs8gxx_autolock_gi(priv, GI_595, 1, &locked);
if (err)
goto out;
if (locked)
goto locked;
}
locked:
if ((err == 0) && (locked == 1)) {
u8 t;
if (priv->config->prod != LGS8GXX_PROD_LGS8G75) {
lgs8gxx_read_reg(priv, 0xA2, &t);
*detected_param = t;
} else {
lgs8gxx_read_reg(priv, 0x1F, &t);
*detected_param = t & 0x3F;
}
if (tmp_gi == GI_945)
dprintk("GI 945 locked\n");
else if (tmp_gi == GI_595)
dprintk("GI 595 locked\n");
else if (tmp_gi == GI_420)
dprintk("GI 420 locked\n");
*gi = tmp_gi;
}
if (!locked)
err = -1;
out:
return err;
}
static void lgs8gxx_auto_lock(struct lgs8gxx_state *priv)
{
s8 err;
u8 gi = 0x2;
u8 detected_param = 0;
err = lgs8gxx_auto_detect(priv, &detected_param, &gi);
if (err != 0) {
dprintk("lgs8gxx_auto_detect failed\n");
} else
dprintk("detected param = 0x%02X\n", detected_param);
/* Apply detected parameters */
if (priv->config->prod == LGS8GXX_PROD_LGS8913) {
u8 inter_leave_len = detected_param & TIM_MASK ;
/* Fix 8913 time interleaver detection bug */
inter_leave_len = (inter_leave_len == TIM_MIDDLE) ? 0x60 : 0x40;
detected_param &= CF_MASK | SC_MASK | LGS_FEC_MASK;
detected_param |= inter_leave_len;
}
if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
u8 t;
lgs8gxx_read_reg(priv, 0x19, &t);
t &= 0x81;
t |= detected_param << 1;
lgs8gxx_write_reg(priv, 0x19, t);
} else {
lgs8gxx_write_reg(priv, 0x7D, detected_param);
if (priv->config->prod == LGS8GXX_PROD_LGS8913)
lgs8gxx_write_reg(priv, 0xC0, detected_param);
}
/* lgs8gxx_soft_reset(priv); */
/* Enter manual mode */
lgs8gxx_set_mode_manual(priv);
switch (gi) {
case GI_945:
priv->curr_gi = 945; break;
case GI_595:
priv->curr_gi = 595; break;
case GI_420:
priv->curr_gi = 420; break;
default:
priv->curr_gi = 945; break;
}
}
static int lgs8gxx_set_mpeg_mode(struct lgs8gxx_state *priv,
u8 serial, u8 clk_pol, u8 clk_gated)
{
int ret = 0;
u8 t, reg_addr;
reg_addr = (priv->config->prod == LGS8GXX_PROD_LGS8G75) ? 0x30 : 0xC2;
ret = lgs8gxx_read_reg(priv, reg_addr, &t);
if (ret != 0)
return ret;
t &= 0xF8;
t |= serial ? TS_SERIAL : TS_PARALLEL;
t |= clk_pol ? TS_CLK_INVERTED : TS_CLK_NORMAL;
t |= clk_gated ? TS_CLK_GATED : TS_CLK_FREERUN;
ret = lgs8gxx_write_reg(priv, reg_addr, t);
if (ret != 0)
return ret;
return 0;
}
/* A/D input peak-to-peak voltage range */
static int lgs8g75_set_adc_vpp(struct lgs8gxx_state *priv,
u8 sel)
{
u8 r26 = 0x73, r27 = 0x90;
if (priv->config->prod != LGS8GXX_PROD_LGS8G75)
return 0;
r26 |= (sel & 0x01) << 7;
r27 |= (sel & 0x02) >> 1;
lgs8gxx_write_reg(priv, 0x26, r26);
lgs8gxx_write_reg(priv, 0x27, r27);
return 0;
}
/* LGS8913 demod frontend functions */
static int lgs8913_init(struct lgs8gxx_state *priv)
{
u8 t;
/* LGS8913 specific */
lgs8gxx_write_reg(priv, 0xc1, 0x3);
lgs8gxx_read_reg(priv, 0x7c, &t);
lgs8gxx_write_reg(priv, 0x7c, (t&0x8c) | 0x3);
/* LGS8913 specific */
lgs8gxx_read_reg(priv, 0xc3, &t);
lgs8gxx_write_reg(priv, 0xc3, t&0x10);
return 0;
}
static int lgs8g75_init_data(struct lgs8gxx_state *priv)
{
const struct firmware *fw;
int rc;
int i;
rc = request_firmware(&fw, LGS8GXX_FIRMWARE, &priv->i2c->dev);
if (rc)
return rc;
lgs8gxx_write_reg(priv, 0xC6, 0x40);
lgs8gxx_write_reg(priv, 0x3D, 0x04);
lgs8gxx_write_reg(priv, 0x39, 0x00);
lgs8gxx_write_reg(priv, 0x3A, 0x00);
lgs8gxx_write_reg(priv, 0x38, 0x00);
lgs8gxx_write_reg(priv, 0x3B, 0x00);
lgs8gxx_write_reg(priv, 0x38, 0x00);
for (i = 0; i < fw->size; i++) {
lgs8gxx_write_reg(priv, 0x38, 0x00);
lgs8gxx_write_reg(priv, 0x3A, (u8)(i&0xff));
lgs8gxx_write_reg(priv, 0x3B, (u8)(i>>8));
lgs8gxx_write_reg(priv, 0x3C, fw->data[i]);
}
lgs8gxx_write_reg(priv, 0x38, 0x00);
release_firmware(fw);
return 0;
}
static int lgs8gxx_init(struct dvb_frontend *fe)
{
struct lgs8gxx_state *priv =
(struct lgs8gxx_state *)fe->demodulator_priv;
const struct lgs8gxx_config *config = priv->config;
u8 data = 0;
s8 err;
dprintk("%s\n", __func__);
lgs8gxx_read_reg(priv, 0, &data);
dprintk("reg 0 = 0x%02X\n", data);
if (config->prod == LGS8GXX_PROD_LGS8G75)
lgs8g75_set_adc_vpp(priv, config->adc_vpp);
/* Setup MPEG output format */
err = lgs8gxx_set_mpeg_mode(priv, config->serial_ts,
config->ts_clk_pol,
config->ts_clk_gated);
if (err != 0)
return -EIO;
if (config->prod == LGS8GXX_PROD_LGS8913)
lgs8913_init(priv);
lgs8gxx_set_if_freq(priv, priv->config->if_freq);
lgs8gxx_set_ad_mode(priv);
return 0;
}
static void lgs8gxx_release(struct dvb_frontend *fe)
{
struct lgs8gxx_state *state = fe->demodulator_priv;
dprintk("%s\n", __func__);
kfree(state);
}
static int lgs8gxx_write(struct dvb_frontend *fe, const u8 buf[], int len)
{
struct lgs8gxx_state *priv = fe->demodulator_priv;
if (len != 2)
return -EINVAL;
return lgs8gxx_write_reg(priv, buf[0], buf[1]);
}
static int lgs8gxx_set_fe(struct dvb_frontend *fe)
{
struct dtv_frontend_properties *fe_params = &fe->dtv_property_cache;
struct lgs8gxx_state *priv = fe->demodulator_priv;
dprintk("%s\n", __func__);
/* set 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);
}
/* start auto lock */
lgs8gxx_auto_lock(priv);
msleep(10);
/* TODO: get real readings from device */
/* bandwidth */
fe_params->bandwidth_hz = 8000000;
fe_params->code_rate_HP = FEC_AUTO;
fe_params->code_rate_LP = FEC_AUTO;
fe_params->modulation = QAM_AUTO;
/* transmission mode */
fe_params->transmission_mode = TRANSMISSION_MODE_AUTO;
/* guard interval */
fe_params->guard_interval = GUARD_INTERVAL_AUTO;
/* hierarchy */
fe_params->hierarchy = HIERARCHY_NONE;
return 0;
}
static
int lgs8gxx_get_tune_settings(struct dvb_frontend *fe,
struct dvb_frontend_tune_settings *fesettings)
{
/* FIXME: copy from tda1004x.c */
fesettings->min_delay_ms = 800;
fesettings->step_size = 0;
fesettings->max_drift = 0;
return 0;
}
static int lgs8gxx_read_status(struct dvb_frontend *fe,
enum fe_status *fe_status)
{
struct lgs8gxx_state *priv = fe->demodulator_priv;
s8 ret;
u8 t, locked = 0;
dprintk("%s\n", __func__);
*fe_status = 0;
lgs8gxx_get_afc_phase(priv);
lgs8gxx_is_locked(priv, &locked);
if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
if (locked)
*fe_status |= FE_HAS_SIGNAL | FE_HAS_CARRIER |
FE_HAS_VITERBI | FE_HAS_SYNC | FE_HAS_LOCK;
return 0;
}
ret = lgs8gxx_read_reg(priv, 0x4B, &t);
if (ret != 0)
return -EIO;
dprintk("Reg 0x4B: 0x%02X\n", t);
*fe_status = 0;
if (priv->config->prod == LGS8GXX_PROD_LGS8913) {
if ((t & 0x40) == 0x40)
*fe_status |= FE_HAS_SIGNAL | FE_HAS_CARRIER;
if ((t & 0x80) == 0x80)
*fe_status |= FE_HAS_VITERBI | FE_HAS_SYNC |
FE_HAS_LOCK;
} else {
if ((t & 0x80) == 0x80)
*fe_status |= FE_HAS_SIGNAL | FE_HAS_CARRIER |
FE_HAS_VITERBI | FE_HAS_SYNC | FE_HAS_LOCK;
}
/* success */
dprintk("%s: fe_status=0x%x\n", __func__, *fe_status);
return 0;
}
static int lgs8gxx_read_signal_agc(struct lgs8gxx_state *priv, u16 *signal)
{
u16 v;
u8 agc_lvl[2], cat;
dprintk("%s()\n", __func__);
lgs8gxx_read_reg(priv, 0x3F, &agc_lvl[0]);
lgs8gxx_read_reg(priv, 0x3E, &agc_lvl[1]);
v = agc_lvl[0];
v <<= 8;
v |= agc_lvl[1];
dprintk("agc_lvl: 0x%04X\n", v);
if (v < 0x100)
cat = 0;
else if (v < 0x190)
cat = 5;
else if (v < 0x2A8)
cat = 4;
else if (v < 0x381)
cat = 3;
else if (v < 0x400)
cat = 2;
else if (v == 0x400)
cat = 1;
else
cat = 0;
*signal = cat * 65535 / 5;
return 0;
}
static int lgs8913_read_signal_strength(struct lgs8gxx_state *priv, u16 *signal)
{
u8 t; s8 ret;
s16 max_strength = 0;
u8 str;
u16 i, gi = priv->curr_gi;
dprintk("%s\n", __func__);
ret = lgs8gxx_read_reg(priv, 0x4B, &t);
if (ret != 0)
return -EIO;
if (fake_signal_str) {
if ((t & 0xC0) == 0xC0) {
dprintk("Fake signal strength\n");
*signal = 0x7FFF;
} else
*signal = 0;
return 0;
}
dprintk("gi = %d\n", gi);
for (i = 0; i < gi; i++) {
if ((i & 0xFF) == 0)
lgs8gxx_write_reg(priv, 0x84, 0x03 & (i >> 8));
lgs8gxx_write_reg(priv, 0x83, i & 0xFF);
lgs8gxx_read_reg(priv, 0x94, &str);
if (max_strength < str)
max_strength = str;
}
*signal = max_strength;
dprintk("%s: signal=0x%02X\n", __func__, *signal);
lgs8gxx_read_reg(priv, 0x95, &t);
dprintk("%s: AVG Noise=0x%02X\n", __func__, t);
return 0;
}
static int lgs8g75_read_signal_strength(struct lgs8gxx_state *priv, u16 *signal)
{
u8 t;
s16 v = 0;
dprintk("%s\n", __func__);
lgs8gxx_read_reg(priv, 0xB1, &t);
v |= t;
v <<= 8;
lgs8gxx_read_reg(priv, 0xB0, &t);
v |= t;
*signal = v;
dprintk("%s: signal=0x%02X\n", __func__, *signal);
return 0;
}
static int lgs8gxx_read_signal_strength(struct dvb_frontend *fe, u16 *signal)
{
struct lgs8gxx_state *priv = fe->demodulator_priv;
if (priv->config->prod == LGS8GXX_PROD_LGS8913)
return lgs8913_read_signal_strength(priv, signal);
else if (priv->config->prod == LGS8GXX_PROD_LGS8G75)
return lgs8g75_read_signal_strength(priv, signal);
else
return lgs8gxx_read_signal_agc(priv, signal);
}
static int lgs8gxx_read_snr(struct dvb_frontend *fe, u16 *snr)
{
struct lgs8gxx_state *priv = fe->demodulator_priv;
u8 t;
*snr = 0;
if (priv->config->prod == LGS8GXX_PROD_LGS8G75)
lgs8gxx_read_reg(priv, 0x34, &t);
else
lgs8gxx_read_reg(priv, 0x95, &t);
dprintk("AVG Noise=0x%02X\n", t);
*snr = 256 - t;
*snr <<= 8;
dprintk("snr=0x%x\n", *snr);
return 0;
}
static int lgs8gxx_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks)
{
*ucblocks = 0;
dprintk("%s: ucblocks=0x%x\n", __func__, *ucblocks);
return 0;
}
static void packet_counter_start(struct lgs8gxx_state *priv)
{
u8 orig, t;
if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
lgs8gxx_read_reg(priv, 0x30, &orig);
orig &= 0xE7;
t = orig | 0x10;
lgs8gxx_write_reg(priv, 0x30, t);
t = orig | 0x18;
lgs8gxx_write_reg(priv, 0x30, t);
t = orig | 0x10;
lgs8gxx_write_reg(priv, 0x30, t);
} else {
lgs8gxx_write_reg(priv, 0xC6, 0x01);
lgs8gxx_write_reg(priv, 0xC6, 0x41);
lgs8gxx_write_reg(priv, 0xC6, 0x01);
}
}
static void packet_counter_stop(struct lgs8gxx_state *priv)
{
u8 t;
if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
lgs8gxx_read_reg(priv, 0x30, &t);
t &= 0xE7;
lgs8gxx_write_reg(priv, 0x30, t);
} else {
lgs8gxx_write_reg(priv, 0xC6, 0x81);
}
}
static int lgs8gxx_read_ber(struct dvb_frontend *fe, u32 *ber)
{
struct lgs8gxx_state *priv = fe->demodulator_priv;
u8 reg_err, reg_total, t;
u32 total_cnt = 0, err_cnt = 0;
int i;
dprintk("%s\n", __func__);
packet_counter_start(priv);
msleep(200);
packet_counter_stop(priv);
if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
reg_total = 0x28; reg_err = 0x2C;
} else {
reg_total = 0xD0; reg_err = 0xD4;
}
for (i = 0; i < 4; i++) {
total_cnt <<= 8;
lgs8gxx_read_reg(priv, reg_total+3-i, &t);
total_cnt |= t;
}
for (i = 0; i < 4; i++) {
err_cnt <<= 8;
lgs8gxx_read_reg(priv, reg_err+3-i, &t);
err_cnt |= t;
}
dprintk("error=%d total=%d\n", err_cnt, total_cnt);
if (total_cnt == 0)
*ber = 0;
else
*ber = err_cnt * 100 / total_cnt;
dprintk("%s: ber=0x%x\n", __func__, *ber);
return 0;
}
static int lgs8gxx_i2c_gate_ctrl(struct dvb_frontend *fe, int enable)
{
struct lgs8gxx_state *priv = fe->demodulator_priv;
if (priv->config->tuner_address == 0)
return 0;
if (enable) {
u8 v = 0x80 | priv->config->tuner_address;
return lgs8gxx_write_reg(priv, 0x01, v);
}
return lgs8gxx_write_reg(priv, 0x01, 0);
}
static const struct dvb_frontend_ops lgs8gxx_ops = {
.delsys = { SYS_DTMB },
.info = {
.name = "Legend Silicon LGS8913/LGS8GXX DMB-TH",
.frequency_min_hz = 474 * MHz,
.frequency_max_hz = 858 * MHz,
.frequency_stepsize_hz = 10 * kHz,
.caps =
FE_CAN_FEC_AUTO |
FE_CAN_QAM_AUTO |
FE_CAN_TRANSMISSION_MODE_AUTO |
FE_CAN_GUARD_INTERVAL_AUTO
},
.release = lgs8gxx_release,
.init = lgs8gxx_init,
.write = lgs8gxx_write,
.i2c_gate_ctrl = lgs8gxx_i2c_gate_ctrl,
.set_frontend = lgs8gxx_set_fe,
.get_tune_settings = lgs8gxx_get_tune_settings,
.read_status = lgs8gxx_read_status,
.read_ber = lgs8gxx_read_ber,
.read_signal_strength = lgs8gxx_read_signal_strength,
.read_snr = lgs8gxx_read_snr,
.read_ucblocks = lgs8gxx_read_ucblocks,
};
struct dvb_frontend *lgs8gxx_attach(const struct lgs8gxx_config *config,
struct i2c_adapter *i2c)
{
struct lgs8gxx_state *priv = NULL;
u8 data = 0;
dprintk("%s()\n", __func__);
if (config == NULL || i2c == NULL)
return NULL;
priv = kzalloc(sizeof(struct lgs8gxx_state), GFP_KERNEL);
if (priv == NULL)
goto error_out;
priv->config = config;
priv->i2c = i2c;
/* check if the demod is there */
if (lgs8gxx_read_reg(priv, 0, &data) != 0) {
dprintk("%s lgs8gxx not found at i2c addr 0x%02X\n",
__func__, priv->config->demod_address);
goto error_out;
}
lgs8gxx_read_reg(priv, 1, &data);
memcpy(&priv->frontend.ops, &lgs8gxx_ops,
sizeof(struct dvb_frontend_ops));
priv->frontend.demodulator_priv = priv;
if (config->prod == LGS8GXX_PROD_LGS8G75)
lgs8g75_init_data(priv);
return &priv->frontend;
error_out:
dprintk("%s() error_out\n", __func__);
kfree(priv);
return NULL;
}
EXPORT_SYMBOL(lgs8gxx_attach);
MODULE_DESCRIPTION("Legend Silicon LGS8913/LGS8GXX DMB-TH demodulator driver");
MODULE_AUTHOR("David T. L. Wong <davidtlwong@gmail.com>");
MODULE_LICENSE("GPL");
MODULE_FIRMWARE(LGS8GXX_FIRMWARE);
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