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alistair23-linux/drivers/media/dvb-frontends/cx24113.c
Sakari Ailus bcb63314e2 [media] media: Drop FSF's postal address from the source code files 
Drop the FSF's postal address from the source code files that typically
contain mostly the license text. Of the 628 removed instances, 578 are
outdated.

The patch has been created with the following command without manual edits:

git grep -l "675 Mass Ave\|59 Temple Place\|51 Franklin St" -- \
	drivers/media/ include/media|while read i; do i=$i perl -e '
open(F,"< $ENV{i}");
$a=join("", <F>);
$a =~ s/[ \t]*\*\n.*You should.*\n.*along with.*\n.*(\n.*USA.*$)?\n//m
	&& $a =~ s/(^.*)Or, (point your browser to) /$1To obtain the license, $2\n$1/m;
close(F);
open(F, "> $ENV{i}");
print F $a;
close(F);'; done

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
2017-01-27 11:38:09 -02:00

614 lines
14 KiB
C
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/*
* Driver for Conexant CX24113/CX24128 Tuner (Satellite)
*
* Copyright (C) 2007-8 Patrick Boettcher <pb@linuxtv.org>
*
* Developed for BBTI / Technisat
*
* 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.
*/
#include <linux/slab.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include "dvb_frontend.h"
#include "cx24113.h"
static int debug;
#define cx_info(args...) do { printk(KERN_INFO "CX24113: " args); } while (0)
#define cx_err(args...) do { printk(KERN_ERR "CX24113: " args); } while (0)
#define dprintk(args...) \
do { \
if (debug) { \
printk(KERN_DEBUG "CX24113: %s: ", __func__); \
printk(args); \
} \
} while (0)
struct cx24113_state {
struct i2c_adapter *i2c;
const struct cx24113_config *config;
#define REV_CX24113 0x23
u8 rev;
u8 ver;
u8 icp_mode:1;
#define ICP_LEVEL1 0
#define ICP_LEVEL2 1
#define ICP_LEVEL3 2
#define ICP_LEVEL4 3
u8 icp_man:2;
u8 icp_auto_low:2;
u8 icp_auto_mlow:2;
u8 icp_auto_mhi:2;
u8 icp_auto_hi:2;
u8 icp_dig;
#define LNA_MIN_GAIN 0
#define LNA_MID_GAIN 1
#define LNA_MAX_GAIN 2
u8 lna_gain:2;
u8 acp_on:1;
u8 vco_mode:2;
u8 vco_shift:1;
#define VCOBANDSEL_6 0x80
#define VCOBANDSEL_5 0x01
#define VCOBANDSEL_4 0x02
#define VCOBANDSEL_3 0x04
#define VCOBANDSEL_2 0x08
#define VCOBANDSEL_1 0x10
u8 vco_band;
#define VCODIV4 4
#define VCODIV2 2
u8 vcodiv;
u8 bs_delay:4;
u16 bs_freqcnt:13;
u16 bs_rdiv;
u8 prescaler_mode:1;
u8 rfvga_bias_ctrl;
s16 tuner_gain_thres;
u8 gain_level;
u32 frequency;
u8 refdiv;
u8 Fwindow_enabled;
};
static int cx24113_writereg(struct cx24113_state *state, int reg, int data)
{
u8 buf[] = { reg, data };
struct i2c_msg msg = { .addr = state->config->i2c_addr,
.flags = 0, .buf = buf, .len = 2 };
int err = i2c_transfer(state->i2c, &msg, 1);
if (err != 1) {
printk(KERN_DEBUG "%s: writereg error(err == %i, reg == 0x%02x, data == 0x%02x)\n",
__func__, err, reg, data);
return err;
}
return 0;
}
static int cx24113_readreg(struct cx24113_state *state, u8 reg)
{
int ret;
u8 b;
struct i2c_msg msg[] = {
{ .addr = state->config->i2c_addr,
.flags = 0, .buf = &reg, .len = 1 },
{ .addr = state->config->i2c_addr,
.flags = I2C_M_RD, .buf = &b, .len = 1 }
};
ret = i2c_transfer(state->i2c, msg, 2);
if (ret != 2) {
printk(KERN_DEBUG "%s: reg=0x%x (error=%d)\n",
__func__, reg, ret);
return ret;
}
return b;
}
static void cx24113_set_parameters(struct cx24113_state *state)
{
u8 r;
r = cx24113_readreg(state, 0x10) & 0x82;
r |= state->icp_mode;
r |= state->icp_man << 4;
r |= state->icp_dig << 2;
r |= state->prescaler_mode << 5;
cx24113_writereg(state, 0x10, r);
r = (state->icp_auto_low << 0) | (state->icp_auto_mlow << 2)
| (state->icp_auto_mhi << 4) | (state->icp_auto_hi << 6);
cx24113_writereg(state, 0x11, r);
if (state->rev == REV_CX24113) {
r = cx24113_readreg(state, 0x20) & 0xec;
r |= state->lna_gain;
r |= state->rfvga_bias_ctrl << 4;
cx24113_writereg(state, 0x20, r);
}
r = cx24113_readreg(state, 0x12) & 0x03;
r |= state->acp_on << 2;
r |= state->bs_delay << 4;
cx24113_writereg(state, 0x12, r);
r = cx24113_readreg(state, 0x18) & 0x40;
r |= state->vco_shift;
if (state->vco_band == VCOBANDSEL_6)
r |= (1 << 7);
else
r |= (state->vco_band << 1);
cx24113_writereg(state, 0x18, r);
r = cx24113_readreg(state, 0x14) & 0x20;
r |= (state->vco_mode << 6) | ((state->bs_freqcnt >> 8) & 0x1f);
cx24113_writereg(state, 0x14, r);
cx24113_writereg(state, 0x15, (state->bs_freqcnt & 0xff));
cx24113_writereg(state, 0x16, (state->bs_rdiv >> 4) & 0xff);
r = (cx24113_readreg(state, 0x17) & 0x0f) |
((state->bs_rdiv & 0x0f) << 4);
cx24113_writereg(state, 0x17, r);
}
#define VGA_0 0x00
#define VGA_1 0x04
#define VGA_2 0x02
#define VGA_3 0x06
#define VGA_4 0x01
#define VGA_5 0x05
#define VGA_6 0x03
#define VGA_7 0x07
#define RFVGA_0 0x00
#define RFVGA_1 0x01
#define RFVGA_2 0x02
#define RFVGA_3 0x03
static int cx24113_set_gain_settings(struct cx24113_state *state,
s16 power_estimation)
{
u8 ampout = cx24113_readreg(state, 0x1d) & 0xf0,
vga = cx24113_readreg(state, 0x1f) & 0x3f,
rfvga = cx24113_readreg(state, 0x20) & 0xf3;
u8 gain_level = power_estimation >= state->tuner_gain_thres;
dprintk("power estimation: %d, thres: %d, gain_level: %d/%d\n",
power_estimation, state->tuner_gain_thres,
state->gain_level, gain_level);
if (gain_level == state->gain_level)
return 0; /* nothing to be done */
ampout |= 0xf;
if (gain_level) {
rfvga |= RFVGA_0 << 2;
vga |= (VGA_7 << 3) | VGA_7;
} else {
rfvga |= RFVGA_2 << 2;
vga |= (VGA_6 << 3) | VGA_2;
}
state->gain_level = gain_level;
cx24113_writereg(state, 0x1d, ampout);
cx24113_writereg(state, 0x1f, vga);
cx24113_writereg(state, 0x20, rfvga);
return 1; /* did something */
}
static int cx24113_set_Fref(struct cx24113_state *state, u8 high)
{
u8 xtal = cx24113_readreg(state, 0x02);
if (state->rev == 0x43 && state->vcodiv == VCODIV4)
high = 1;
xtal &= ~0x2;
if (high)
xtal |= high << 1;
return cx24113_writereg(state, 0x02, xtal);
}
static int cx24113_enable(struct cx24113_state *state, u8 enable)
{
u8 r21 = (cx24113_readreg(state, 0x21) & 0xc0) | enable;
if (state->rev == REV_CX24113)
r21 |= (1 << 1);
return cx24113_writereg(state, 0x21, r21);
}
static int cx24113_set_bandwidth(struct cx24113_state *state, u32 bandwidth_khz)
{
u8 r;
if (bandwidth_khz <= 19000)
r = 0x03 << 6;
else if (bandwidth_khz <= 25000)
r = 0x02 << 6;
else
r = 0x01 << 6;
dprintk("bandwidth to be set: %d\n", bandwidth_khz);
bandwidth_khz *= 10;
bandwidth_khz -= 10000;
bandwidth_khz /= 1000;
bandwidth_khz += 5;
bandwidth_khz /= 10;
dprintk("bandwidth: %d %d\n", r >> 6, bandwidth_khz);
r |= bandwidth_khz & 0x3f;
return cx24113_writereg(state, 0x1e, r);
}
static int cx24113_set_clk_inversion(struct cx24113_state *state, u8 on)
{
u8 r = (cx24113_readreg(state, 0x10) & 0x7f) | ((on & 0x1) << 7);
return cx24113_writereg(state, 0x10, r);
}
static int cx24113_get_status(struct dvb_frontend *fe, u32 *status)
{
struct cx24113_state *state = fe->tuner_priv;
u8 r = (cx24113_readreg(state, 0x10) & 0x02) >> 1;
if (r)
*status |= TUNER_STATUS_LOCKED;
dprintk("PLL locked: %d\n", r);
return 0;
}
static u8 cx24113_set_ref_div(struct cx24113_state *state, u8 refdiv)
{
if (state->rev == 0x43 && state->vcodiv == VCODIV4)
refdiv = 2;
return state->refdiv = refdiv;
}
static void cx24113_calc_pll_nf(struct cx24113_state *state, u16 *n, s32 *f)
{
s32 N;
s64 F;
u64 dividend;
u8 R, r;
u8 vcodiv;
u8 factor;
s32 freq_hz = state->frequency * 1000;
if (state->config->xtal_khz < 20000)
factor = 1;
else
factor = 2;
if (state->rev == REV_CX24113) {
if (state->frequency >= 1100000)
vcodiv = VCODIV2;
else
vcodiv = VCODIV4;
} else {
if (state->frequency >= 1165000)
vcodiv = VCODIV2;
else
vcodiv = VCODIV4;
}
state->vcodiv = vcodiv;
dprintk("calculating N/F for %dHz with vcodiv %d\n", freq_hz, vcodiv);
R = 0;
do {
R = cx24113_set_ref_div(state, R + 1);
/* calculate tuner PLL settings: */
N = (freq_hz / 100 * vcodiv) * R;
N /= (state->config->xtal_khz) * factor * 2;
N += 5; /* For round up. */
N /= 10;
N -= 32;
} while (N < 6 && R < 3);
if (N < 6) {
cx_err("strange frequency: N < 6\n");
return;
}
F = freq_hz;
F *= (u64) (R * vcodiv * 262144);
dprintk("1 N: %d, F: %lld, R: %d\n", N, (long long)F, R);
/* do_div needs an u64 as first argument */
dividend = F;
do_div(dividend, state->config->xtal_khz * 1000 * factor * 2);
F = dividend;
dprintk("2 N: %d, F: %lld, R: %d\n", N, (long long)F, R);
F -= (N + 32) * 262144;
dprintk("3 N: %d, F: %lld, R: %d\n", N, (long long)F, R);
if (state->Fwindow_enabled) {
if (F > (262144 / 2 - 1638))
F = 262144 / 2 - 1638;
if (F < (-262144 / 2 + 1638))
F = -262144 / 2 + 1638;
if ((F < 3277 && F > 0) || (F > -3277 && F < 0)) {
F = 0;
r = cx24113_readreg(state, 0x10);
cx24113_writereg(state, 0x10, r | (1 << 6));
}
}
dprintk("4 N: %d, F: %lld, R: %d\n", N, (long long)F, R);
*n = (u16) N;
*f = (s32) F;
}
static void cx24113_set_nfr(struct cx24113_state *state, u16 n, s32 f, u8 r)
{
u8 reg;
cx24113_writereg(state, 0x19, (n >> 1) & 0xff);
reg = ((n & 0x1) << 7) | ((f >> 11) & 0x7f);
cx24113_writereg(state, 0x1a, reg);
cx24113_writereg(state, 0x1b, (f >> 3) & 0xff);
reg = cx24113_readreg(state, 0x1c) & 0x1f;
cx24113_writereg(state, 0x1c, reg | ((f & 0x7) << 5));
cx24113_set_Fref(state, r - 1);
}
static int cx24113_set_frequency(struct cx24113_state *state, u32 frequency)
{
u8 r = 1; /* or 2 */
u16 n = 6;
s32 f = 0;
r = cx24113_readreg(state, 0x14);
cx24113_writereg(state, 0x14, r & 0x3f);
r = cx24113_readreg(state, 0x10);
cx24113_writereg(state, 0x10, r & 0xbf);
state->frequency = frequency;
dprintk("tuning to frequency: %d\n", frequency);
cx24113_calc_pll_nf(state, &n, &f);
cx24113_set_nfr(state, n, f, state->refdiv);
r = cx24113_readreg(state, 0x18) & 0xbf;
if (state->vcodiv != VCODIV2)
r |= 1 << 6;
cx24113_writereg(state, 0x18, r);
/* The need for this sleep is not clear. But helps in some cases */
msleep(5);
r = cx24113_readreg(state, 0x1c) & 0xef;
cx24113_writereg(state, 0x1c, r | (1 << 4));
return 0;
}
static int cx24113_init(struct dvb_frontend *fe)
{
struct cx24113_state *state = fe->tuner_priv;
int ret;
state->tuner_gain_thres = -50;
state->gain_level = 255; /* to force a gain-setting initialization */
state->icp_mode = 0;
if (state->config->xtal_khz < 11000) {
state->icp_auto_hi = ICP_LEVEL4;
state->icp_auto_mhi = ICP_LEVEL4;
state->icp_auto_mlow = ICP_LEVEL3;
state->icp_auto_low = ICP_LEVEL3;
} else {
state->icp_auto_hi = ICP_LEVEL4;
state->icp_auto_mhi = ICP_LEVEL4;
state->icp_auto_mlow = ICP_LEVEL3;
state->icp_auto_low = ICP_LEVEL2;
}
state->icp_dig = ICP_LEVEL3;
state->icp_man = ICP_LEVEL1;
state->acp_on = 1;
state->vco_mode = 0;
state->vco_shift = 0;
state->vco_band = VCOBANDSEL_1;
state->bs_delay = 8;
state->bs_freqcnt = 0x0fff;
state->bs_rdiv = 0x0fff;
state->prescaler_mode = 0;
state->lna_gain = LNA_MAX_GAIN;
state->rfvga_bias_ctrl = 1;
state->Fwindow_enabled = 1;
cx24113_set_Fref(state, 0);
cx24113_enable(state, 0x3d);
cx24113_set_parameters(state);
cx24113_set_gain_settings(state, -30);
cx24113_set_bandwidth(state, 18025);
cx24113_set_clk_inversion(state, 1);
if (state->config->xtal_khz >= 40000)
ret = cx24113_writereg(state, 0x02,
(cx24113_readreg(state, 0x02) & 0xfb) | (1 << 2));
else
ret = cx24113_writereg(state, 0x02,
(cx24113_readreg(state, 0x02) & 0xfb) | (0 << 2));
return ret;
}
static int cx24113_set_params(struct dvb_frontend *fe)
{
struct dtv_frontend_properties *c = &fe->dtv_property_cache;
struct cx24113_state *state = fe->tuner_priv;
/* for a ROLL-OFF factor of 0.35, 0.2: 600, 0.25: 625 */
u32 roll_off = 675;
u32 bw;
bw = ((c->symbol_rate/100) * roll_off) / 1000;
bw += (10000000/100) + 5;
bw /= 10;
bw += 1000;
cx24113_set_bandwidth(state, bw);
cx24113_set_frequency(state, c->frequency);
msleep(5);
return cx24113_get_status(fe, &bw);
}
static s8 cx24113_agc_table[2][10] = {
{-54, -41, -35, -30, -25, -21, -16, -10, -6, -2},
{-39, -35, -30, -25, -19, -15, -11, -5, 1, 9},
};
void cx24113_agc_callback(struct dvb_frontend *fe)
{
struct cx24113_state *state = fe->tuner_priv;
s16 s, i;
if (!fe->ops.read_signal_strength)
return;
do {
/* this only works with the current CX24123 implementation */
fe->ops.read_signal_strength(fe, (u16 *) &s);
s >>= 8;
dprintk("signal strength: %d\n", s);
for (i = 0; i < sizeof(cx24113_agc_table[0]); i++)
if (cx24113_agc_table[state->gain_level][i] > s)
break;
s = -25 - i*5;
} while (cx24113_set_gain_settings(state, s));
}
EXPORT_SYMBOL(cx24113_agc_callback);
static int cx24113_get_frequency(struct dvb_frontend *fe, u32 *frequency)
{
struct cx24113_state *state = fe->tuner_priv;
*frequency = state->frequency;
return 0;
}
static void cx24113_release(struct dvb_frontend *fe)
{
struct cx24113_state *state = fe->tuner_priv;
dprintk("\n");
fe->tuner_priv = NULL;
kfree(state);
}
static const struct dvb_tuner_ops cx24113_tuner_ops = {
.info = {
.name = "Conexant CX24113",
.frequency_min = 950000,
.frequency_max = 2150000,
.frequency_step = 125,
},
.release = cx24113_release,
.init = cx24113_init,
.set_params = cx24113_set_params,
.get_frequency = cx24113_get_frequency,
.get_status = cx24113_get_status,
};
struct dvb_frontend *cx24113_attach(struct dvb_frontend *fe,
const struct cx24113_config *config, struct i2c_adapter *i2c)
{
/* allocate memory for the internal state */
struct cx24113_state *state =
kzalloc(sizeof(struct cx24113_state), GFP_KERNEL);
int rc;
if (state == NULL) {
cx_err("Unable to kzalloc\n");
goto error;
}
/* setup the state */
state->config = config;
state->i2c = i2c;
cx_info("trying to detect myself\n");
/* making a dummy read, because of some expected troubles
* after power on */
cx24113_readreg(state, 0x00);
rc = cx24113_readreg(state, 0x00);
if (rc < 0) {
cx_info("CX24113 not found.\n");
goto error;
}
state->rev = rc;
switch (rc) {
case 0x43:
cx_info("detected CX24113 variant\n");
break;
case REV_CX24113:
cx_info("successfully detected\n");
break;
default:
cx_err("unsupported device id: %x\n", state->rev);
goto error;
}
state->ver = cx24113_readreg(state, 0x01);
cx_info("version: %x\n", state->ver);
/* create dvb_frontend */
memcpy(&fe->ops.tuner_ops, &cx24113_tuner_ops,
sizeof(struct dvb_tuner_ops));
fe->tuner_priv = state;
return fe;
error:
kfree(state);
return NULL;
}
EXPORT_SYMBOL(cx24113_attach);
module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "Activates frontend debugging (default:0)");
MODULE_AUTHOR("Patrick Boettcher <pb@linuxtv.org>");
MODULE_DESCRIPTION("DVB Frontend module for Conexant CX24113/CX24128hardware");
MODULE_LICENSE("GPL");
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