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linux-next/drivers/media/tuners/max2165.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outdated.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

428 lines
9.8 KiB
C
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/*
* Driver for Maxim MAX2165 silicon tuner
*
* Copyright (c) 2009 David T. L. Wong <davidtlwong@gmail.com>
*
* 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/module.h>
#include <linux/moduleparam.h>
#include <linux/videodev2.h>
#include <linux/delay.h>
#include <linux/dvb/frontend.h>
#include <linux/i2c.h>
#include <linux/slab.h>
#include "dvb_frontend.h"
#include "max2165.h"
#include "max2165_priv.h"
#include "tuner-i2c.h"
#define dprintk(args...) \
do { \
if (debug) \
printk(KERN_DEBUG "max2165: " args); \
} while (0)
static int debug;
module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "Turn on/off debugging (default:off).");
static int max2165_write_reg(struct max2165_priv *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->i2c_address;
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) ? -EIO : 0;
}
static int max2165_read_reg(struct max2165_priv *priv, u8 reg, u8 *p_data)
{
int ret;
u8 dev_addr = priv->config->i2c_address;
u8 b0[] = { reg };
u8 b1[] = { 0 };
struct i2c_msg msg[] = {
{ .addr = dev_addr, .flags = 0, .buf = b0, .len = 1 },
{ .addr = dev_addr, .flags = I2C_M_RD, .buf = b1, .len = 1 },
};
ret = i2c_transfer(priv->i2c, msg, 2);
if (ret != 2) {
dprintk("%s: error reg=0x%x, ret=%i\n", __func__, reg, ret);
return -EIO;
}
*p_data = b1[0];
if (debug >= 2)
dprintk("%s: reg=0x%02X, data=0x%02X\n",
__func__, reg, b1[0]);
return 0;
}
static int max2165_mask_write_reg(struct max2165_priv *priv, u8 reg,
u8 mask, u8 data)
{
int ret;
u8 v;
data &= mask;
ret = max2165_read_reg(priv, reg, &v);
if (ret != 0)
return ret;
v &= ~mask;
v |= data;
ret = max2165_write_reg(priv, reg, v);
return ret;
}
static int max2165_read_rom_table(struct max2165_priv *priv)
{
u8 dat[3];
int i;
for (i = 0; i < 3; i++) {
max2165_write_reg(priv, REG_ROM_TABLE_ADDR, i + 1);
max2165_read_reg(priv, REG_ROM_TABLE_DATA, &dat[i]);
}
priv->tf_ntch_low_cfg = dat[0] >> 4;
priv->tf_ntch_hi_cfg = dat[0] & 0x0F;
priv->tf_balun_low_ref = dat[1] & 0x0F;
priv->tf_balun_hi_ref = dat[1] >> 4;
priv->bb_filter_7mhz_cfg = dat[2] & 0x0F;
priv->bb_filter_8mhz_cfg = dat[2] >> 4;
dprintk("tf_ntch_low_cfg = 0x%X\n", priv->tf_ntch_low_cfg);
dprintk("tf_ntch_hi_cfg = 0x%X\n", priv->tf_ntch_hi_cfg);
dprintk("tf_balun_low_ref = 0x%X\n", priv->tf_balun_low_ref);
dprintk("tf_balun_hi_ref = 0x%X\n", priv->tf_balun_hi_ref);
dprintk("bb_filter_7mhz_cfg = 0x%X\n", priv->bb_filter_7mhz_cfg);
dprintk("bb_filter_8mhz_cfg = 0x%X\n", priv->bb_filter_8mhz_cfg);
return 0;
}
static int max2165_set_osc(struct max2165_priv *priv, u8 osc /*MHz*/)
{
u8 v;
v = (osc / 2);
if (v == 2)
v = 0x7;
else
v -= 8;
max2165_mask_write_reg(priv, REG_PLL_CFG, 0x07, v);
return 0;
}
static int max2165_set_bandwidth(struct max2165_priv *priv, u32 bw)
{
u8 val;
if (bw == 8000000)
val = priv->bb_filter_8mhz_cfg;
else
val = priv->bb_filter_7mhz_cfg;
max2165_mask_write_reg(priv, REG_BASEBAND_CTRL, 0xF0, val << 4);
return 0;
}
static int fixpt_div32(u32 dividend, u32 divisor, u32 *quotient, u32 *fraction)
{
u32 remainder;
u32 q, f = 0;
int i;
if (0 == divisor)
return -EINVAL;
q = dividend / divisor;
remainder = dividend - q * divisor;
for (i = 0; i < 31; i++) {
remainder <<= 1;
if (remainder >= divisor) {
f += 1;
remainder -= divisor;
}
f <<= 1;
}
*quotient = q;
*fraction = f;
return 0;
}
static int max2165_set_rf(struct max2165_priv *priv, u32 freq)
{
u8 tf;
u8 tf_ntch;
u32 t;
u32 quotient, fraction;
int ret;
/* Set PLL divider according to RF frequency */
ret = fixpt_div32(freq / 1000, priv->config->osc_clk * 1000,
&quotient, &fraction);
if (ret != 0)
return ret;
/* 20-bit fraction */
fraction >>= 12;
max2165_write_reg(priv, REG_NDIV_INT, quotient);
max2165_mask_write_reg(priv, REG_NDIV_FRAC2, 0x0F, fraction >> 16);
max2165_write_reg(priv, REG_NDIV_FRAC1, fraction >> 8);
max2165_write_reg(priv, REG_NDIV_FRAC0, fraction);
/* Norch Filter */
tf_ntch = (freq < 725000000) ?
priv->tf_ntch_low_cfg : priv->tf_ntch_hi_cfg;
/* Tracking filter balun */
t = priv->tf_balun_low_ref;
t += (priv->tf_balun_hi_ref - priv->tf_balun_low_ref)
* (freq / 1000 - 470000) / (780000 - 470000);
tf = t;
dprintk("tf = %X\n", tf);
tf |= tf_ntch << 4;
max2165_write_reg(priv, REG_TRACK_FILTER, tf);
return 0;
}
static void max2165_debug_status(struct max2165_priv *priv)
{
u8 status, autotune;
u8 auto_vco_success, auto_vco_active;
u8 pll_locked;
u8 dc_offset_low, dc_offset_hi;
u8 signal_lv_over_threshold;
u8 vco, vco_sub_band, adc;
max2165_read_reg(priv, REG_STATUS, &status);
max2165_read_reg(priv, REG_AUTOTUNE, &autotune);
auto_vco_success = (status >> 6) & 0x01;
auto_vco_active = (status >> 5) & 0x01;
pll_locked = (status >> 4) & 0x01;
dc_offset_low = (status >> 3) & 0x01;
dc_offset_hi = (status >> 2) & 0x01;
signal_lv_over_threshold = status & 0x01;
vco = autotune >> 6;
vco_sub_band = (autotune >> 3) & 0x7;
adc = autotune & 0x7;
dprintk("auto VCO active: %d, auto VCO success: %d\n",
auto_vco_active, auto_vco_success);
dprintk("PLL locked: %d\n", pll_locked);
dprintk("DC offset low: %d, DC offset high: %d\n",
dc_offset_low, dc_offset_hi);
dprintk("Signal lvl over threshold: %d\n", signal_lv_over_threshold);
dprintk("VCO: %d, VCO Sub-band: %d, ADC: %d\n", vco, vco_sub_band, adc);
}
static int max2165_set_params(struct dvb_frontend *fe)
{
struct max2165_priv *priv = fe->tuner_priv;
struct dtv_frontend_properties *c = &fe->dtv_property_cache;
int ret;
switch (c->bandwidth_hz) {
case 7000000:
case 8000000:
priv->frequency = c->frequency;
break;
default:
printk(KERN_INFO "MAX2165: bandwidth %d Hz not supported.\n",
c->bandwidth_hz);
return -EINVAL;
}
dprintk("%s() frequency=%d\n", __func__, c->frequency);
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 1);
max2165_set_bandwidth(priv, c->bandwidth_hz);
ret = max2165_set_rf(priv, priv->frequency);
mdelay(50);
max2165_debug_status(priv);
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 0);
if (ret != 0)
return -EREMOTEIO;
return 0;
}
static int max2165_get_frequency(struct dvb_frontend *fe, u32 *freq)
{
struct max2165_priv *priv = fe->tuner_priv;
dprintk("%s()\n", __func__);
*freq = priv->frequency;
return 0;
}
static int max2165_get_bandwidth(struct dvb_frontend *fe, u32 *bw)
{
struct max2165_priv *priv = fe->tuner_priv;
dprintk("%s()\n", __func__);
*bw = priv->bandwidth;
return 0;
}
static int max2165_get_status(struct dvb_frontend *fe, u32 *status)
{
struct max2165_priv *priv = fe->tuner_priv;
u16 lock_status = 0;
dprintk("%s()\n", __func__);
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 1);
max2165_debug_status(priv);
*status = lock_status;
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 0);
return 0;
}
static int max2165_sleep(struct dvb_frontend *fe)
{
dprintk("%s()\n", __func__);
return 0;
}
static int max2165_init(struct dvb_frontend *fe)
{
struct max2165_priv *priv = fe->tuner_priv;
dprintk("%s()\n", __func__);
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 1);
/* Setup initial values */
/* Fractional Mode on */
max2165_write_reg(priv, REG_NDIV_FRAC2, 0x18);
/* LNA on */
max2165_write_reg(priv, REG_LNA, 0x01);
max2165_write_reg(priv, REG_PLL_CFG, 0x7A);
max2165_write_reg(priv, REG_TEST, 0x08);
max2165_write_reg(priv, REG_SHUTDOWN, 0x40);
max2165_write_reg(priv, REG_VCO_CTRL, 0x84);
max2165_write_reg(priv, REG_BASEBAND_CTRL, 0xC3);
max2165_write_reg(priv, REG_DC_OFFSET_CTRL, 0x75);
max2165_write_reg(priv, REG_DC_OFFSET_DAC, 0x00);
max2165_write_reg(priv, REG_ROM_TABLE_ADDR, 0x00);
max2165_set_osc(priv, priv->config->osc_clk);
max2165_read_rom_table(priv);
max2165_set_bandwidth(priv, 8000000);
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 0);
return 0;
}
static void max2165_release(struct dvb_frontend *fe)
{
struct max2165_priv *priv = fe->tuner_priv;
dprintk("%s()\n", __func__);
kfree(priv);
fe->tuner_priv = NULL;
}
static const struct dvb_tuner_ops max2165_tuner_ops = {
.info = {
.name = "Maxim MAX2165",
.frequency_min = 470000000,
.frequency_max = 862000000,
.frequency_step = 50000,
},
.release = max2165_release,
.init = max2165_init,
.sleep = max2165_sleep,
.set_params = max2165_set_params,
.set_analog_params = NULL,
.get_frequency = max2165_get_frequency,
.get_bandwidth = max2165_get_bandwidth,
.get_status = max2165_get_status
};
struct dvb_frontend *max2165_attach(struct dvb_frontend *fe,
struct i2c_adapter *i2c,
struct max2165_config *cfg)
{
struct max2165_priv *priv = NULL;
dprintk("%s(%d-%04x)\n", __func__,
i2c ? i2c_adapter_id(i2c) : -1,
cfg ? cfg->i2c_address : -1);
priv = kzalloc(sizeof(struct max2165_priv), GFP_KERNEL);
if (priv == NULL)
return NULL;
memcpy(&fe->ops.tuner_ops, &max2165_tuner_ops,
sizeof(struct dvb_tuner_ops));
priv->config = cfg;
priv->i2c = i2c;
fe->tuner_priv = priv;
max2165_init(fe);
max2165_debug_status(priv);
return fe;
}
EXPORT_SYMBOL(max2165_attach);
MODULE_AUTHOR("David T. L. Wong <davidtlwong@gmail.com>");
MODULE_DESCRIPTION("Maxim MAX2165 silicon tuner driver");
MODULE_LICENSE("GPL");
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