344 lines
8.5 KiB
C
344 lines
8.5 KiB
C
|
// SPDX-License-Identifier: GPL-2.0-or-later
|
||
|
|
/*
|
||
|
|
* Driver for Microtune MT2266 "Direct conversion low power broadband tuner"
|
||
|
|
*
|
||
|
|
* Copyright (c) 2007 Olivier DANET <odanet@caramail.com>
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <linux/module.h>
|
||
|
|
#include <linux/delay.h>
|
||
|
|
#include <linux/dvb/frontend.h>
|
||
|
|
#include <linux/i2c.h>
|
||
|
|
#include <linux/slab.h>
|
||
|
|
|
||
|
|
#include <media/dvb_frontend.h>
|
||
|
|
#include "mt2266.h"
|
||
|
|
|
||
|
|
#define I2C_ADDRESS 0x60
|
||
|
|
|
||
|
|
#define REG_PART_REV 0
|
||
|
|
#define REG_TUNE 1
|
||
|
|
#define REG_BAND 6
|
||
|
|
#define REG_BANDWIDTH 8
|
||
|
|
#define REG_LOCK 0x12
|
||
|
|
|
||
|
|
#define PART_REV 0x85
|
||
|
|
|
||
|
|
struct mt2266_priv {
|
||
|
|
struct mt2266_config *cfg;
|
||
|
|
struct i2c_adapter *i2c;
|
||
|
|
|
||
|
|
u32 frequency;
|
||
|
|
u32 bandwidth;
|
||
|
|
u8 band;
|
||
|
|
};
|
||
|
|
|
||
|
|
#define MT2266_VHF 1
|
||
|
|
#define MT2266_UHF 0
|
||
|
|
|
||
|
|
/* Here, frequencies are expressed in kiloHertz to avoid 32 bits overflows */
|
||
|
|
|
||
|
|
static int debug;
|
||
|
|
module_param(debug, int, 0644);
|
||
|
|
MODULE_PARM_DESC(debug, "Turn on/off debugging (default:off).");
|
||
|
|
|
||
|
|
#define dprintk(args...) do { if (debug) {printk(KERN_DEBUG "MT2266: " args); printk("\n"); }} while (0)
|
||
|
|
|
||
|
|
// Reads a single register
|
||
|
|
static int mt2266_readreg(struct mt2266_priv *priv, u8 reg, u8 *val)
|
||
|
|
{
|
||
|
|
struct i2c_msg msg[2] = {
|
||
|
|
{ .addr = priv->cfg->i2c_address, .flags = 0, .buf = ®, .len = 1 },
|
||
|
|
{ .addr = priv->cfg->i2c_address, .flags = I2C_M_RD, .buf = val, .len = 1 },
|
||
|
|
};
|
||
|
|
if (i2c_transfer(priv->i2c, msg, 2) != 2) {
|
||
|
|
printk(KERN_WARNING "MT2266 I2C read failed\n");
|
||
|
|
return -EREMOTEIO;
|
||
|
|
}
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Writes a single register
|
||
|
|
static int mt2266_writereg(struct mt2266_priv *priv, u8 reg, u8 val)
|
||
|
|
{
|
||
|
|
u8 buf[2] = { reg, val };
|
||
|
|
struct i2c_msg msg = {
|
||
|
|
.addr = priv->cfg->i2c_address, .flags = 0, .buf = buf, .len = 2
|
||
|
|
};
|
||
|
|
if (i2c_transfer(priv->i2c, &msg, 1) != 1) {
|
||
|
|
printk(KERN_WARNING "MT2266 I2C write failed\n");
|
||
|
|
return -EREMOTEIO;
|
||
|
|
}
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Writes a set of consecutive registers
|
||
|
|
static int mt2266_writeregs(struct mt2266_priv *priv,u8 *buf, u8 len)
|
||
|
|
{
|
||
|
|
struct i2c_msg msg = {
|
||
|
|
.addr = priv->cfg->i2c_address, .flags = 0, .buf = buf, .len = len
|
||
|
|
};
|
||
|
|
if (i2c_transfer(priv->i2c, &msg, 1) != 1) {
|
||
|
|
printk(KERN_WARNING "MT2266 I2C write failed (len=%i)\n",(int)len);
|
||
|
|
return -EREMOTEIO;
|
||
|
|
}
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Initialisation sequences
|
||
|
|
static u8 mt2266_init1[] = { REG_TUNE, 0x00, 0x00, 0x28,
|
||
|
|
0x00, 0x52, 0x99, 0x3f };
|
||
|
|
|
||
|
|
static u8 mt2266_init2[] = {
|
||
|
|
0x17, 0x6d, 0x71, 0x61, 0xc0, 0xbf, 0xff, 0xdc, 0x00, 0x0a, 0xd4,
|
||
|
|
0x03, 0x64, 0x64, 0x64, 0x64, 0x22, 0xaa, 0xf2, 0x1e, 0x80, 0x14,
|
||
|
|
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x7f, 0x5e, 0x3f, 0xff, 0xff,
|
||
|
|
0xff, 0x00, 0x77, 0x0f, 0x2d
|
||
|
|
};
|
||
|
|
|
||
|
|
static u8 mt2266_init_8mhz[] = { REG_BANDWIDTH, 0x22, 0x22, 0x22, 0x22,
|
||
|
|
0x22, 0x22, 0x22, 0x22 };
|
||
|
|
|
||
|
|
static u8 mt2266_init_7mhz[] = { REG_BANDWIDTH, 0x32, 0x32, 0x32, 0x32,
|
||
|
|
0x32, 0x32, 0x32, 0x32 };
|
||
|
|
|
||
|
|
static u8 mt2266_init_6mhz[] = { REG_BANDWIDTH, 0xa7, 0xa7, 0xa7, 0xa7,
|
||
|
|
0xa7, 0xa7, 0xa7, 0xa7 };
|
||
|
|
|
||
|
|
static u8 mt2266_uhf[] = { 0x1d, 0xdc, 0x00, 0x0a, 0xd4, 0x03, 0x64, 0x64,
|
||
|
|
0x64, 0x64, 0x22, 0xaa, 0xf2, 0x1e, 0x80, 0x14 };
|
||
|
|
|
||
|
|
static u8 mt2266_vhf[] = { 0x1d, 0xfe, 0x00, 0x00, 0xb4, 0x03, 0xa5, 0xa5,
|
||
|
|
0xa5, 0xa5, 0x82, 0xaa, 0xf1, 0x17, 0x80, 0x1f };
|
||
|
|
|
||
|
|
#define FREF 30000 // Quartz oscillator 30 MHz
|
||
|
|
|
||
|
|
static int mt2266_set_params(struct dvb_frontend *fe)
|
||
|
|
{
|
||
|
|
struct dtv_frontend_properties *c = &fe->dtv_property_cache;
|
||
|
|
struct mt2266_priv *priv;
|
||
|
|
int ret=0;
|
||
|
|
u32 freq;
|
||
|
|
u32 tune;
|
||
|
|
u8 lnaband;
|
||
|
|
u8 b[10];
|
||
|
|
int i;
|
||
|
|
u8 band;
|
||
|
|
|
||
|
|
priv = fe->tuner_priv;
|
||
|
|
|
||
|
|
freq = priv->frequency / 1000; /* Hz -> kHz */
|
||
|
|
if (freq < 470000 && freq > 230000)
|
||
|
|
return -EINVAL; /* Gap between VHF and UHF bands */
|
||
|
|
|
||
|
|
priv->frequency = c->frequency;
|
||
|
|
tune = 2 * freq * (8192/16) / (FREF/16);
|
||
|
|
band = (freq < 300000) ? MT2266_VHF : MT2266_UHF;
|
||
|
|
if (band == MT2266_VHF)
|
||
|
|
tune *= 2;
|
||
|
|
|
||
|
|
switch (c->bandwidth_hz) {
|
||
|
|
case 6000000:
|
||
|
|
mt2266_writeregs(priv, mt2266_init_6mhz,
|
||
|
|
sizeof(mt2266_init_6mhz));
|
||
|
|
break;
|
||
|
|
case 8000000:
|
||
|
|
mt2266_writeregs(priv, mt2266_init_8mhz,
|
||
|
|
sizeof(mt2266_init_8mhz));
|
||
|
|
break;
|
||
|
|
case 7000000:
|
||
|
|
default:
|
||
|
|
mt2266_writeregs(priv, mt2266_init_7mhz,
|
||
|
|
sizeof(mt2266_init_7mhz));
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
priv->bandwidth = c->bandwidth_hz;
|
||
|
|
|
||
|
|
if (band == MT2266_VHF && priv->band == MT2266_UHF) {
|
||
|
|
dprintk("Switch from UHF to VHF");
|
||
|
|
mt2266_writereg(priv, 0x05, 0x04);
|
||
|
|
mt2266_writereg(priv, 0x19, 0x61);
|
||
|
|
mt2266_writeregs(priv, mt2266_vhf, sizeof(mt2266_vhf));
|
||
|
|
} else if (band == MT2266_UHF && priv->band == MT2266_VHF) {
|
||
|
|
dprintk("Switch from VHF to UHF");
|
||
|
|
mt2266_writereg(priv, 0x05, 0x52);
|
||
|
|
mt2266_writereg(priv, 0x19, 0x61);
|
||
|
|
mt2266_writeregs(priv, mt2266_uhf, sizeof(mt2266_uhf));
|
||
|
|
}
|
||
|
|
msleep(10);
|
||
|
|
|
||
|
|
if (freq <= 495000)
|
||
|
|
lnaband = 0xEE;
|
||
|
|
else if (freq <= 525000)
|
||
|
|
lnaband = 0xDD;
|
||
|
|
else if (freq <= 550000)
|
||
|
|
lnaband = 0xCC;
|
||
|
|
else if (freq <= 580000)
|
||
|
|
lnaband = 0xBB;
|
||
|
|
else if (freq <= 605000)
|
||
|
|
lnaband = 0xAA;
|
||
|
|
else if (freq <= 630000)
|
||
|
|
lnaband = 0x99;
|
||
|
|
else if (freq <= 655000)
|
||
|
|
lnaband = 0x88;
|
||
|
|
else if (freq <= 685000)
|
||
|
|
lnaband = 0x77;
|
||
|
|
else if (freq <= 710000)
|
||
|
|
lnaband = 0x66;
|
||
|
|
else if (freq <= 735000)
|
||
|
|
lnaband = 0x55;
|
||
|
|
else if (freq <= 765000)
|
||
|
|
lnaband = 0x44;
|
||
|
|
else if (freq <= 802000)
|
||
|
|
lnaband = 0x33;
|
||
|
|
else if (freq <= 840000)
|
||
|
|
lnaband = 0x22;
|
||
|
|
else
|
||
|
|
lnaband = 0x11;
|
||
|
|
|
||
|
|
b[0] = REG_TUNE;
|
||
|
|
b[1] = (tune >> 8) & 0x1F;
|
||
|
|
b[2] = tune & 0xFF;
|
||
|
|
b[3] = tune >> 13;
|
||
|
|
mt2266_writeregs(priv,b,4);
|
||
|
|
|
||
|
|
dprintk("set_parms: tune=%d band=%d %s",
|
||
|
|
(int) tune, (int) lnaband,
|
||
|
|
(band == MT2266_UHF) ? "UHF" : "VHF");
|
||
|
|
dprintk("set_parms: [1..3]: %2x %2x %2x",
|
||
|
|
(int) b[1], (int) b[2], (int)b[3]);
|
||
|
|
|
||
|
|
if (band == MT2266_UHF) {
|
||
|
|
b[0] = 0x05;
|
||
|
|
b[1] = (priv->band == MT2266_VHF) ? 0x52 : 0x62;
|
||
|
|
b[2] = lnaband;
|
||
|
|
mt2266_writeregs(priv, b, 3);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Wait for pll lock or timeout */
|
||
|
|
i = 0;
|
||
|
|
do {
|
||
|
|
mt2266_readreg(priv,REG_LOCK,b);
|
||
|
|
if (b[0] & 0x40)
|
||
|
|
break;
|
||
|
|
msleep(10);
|
||
|
|
i++;
|
||
|
|
} while (i<10);
|
||
|
|
dprintk("Lock when i=%i",(int)i);
|
||
|
|
|
||
|
|
if (band == MT2266_UHF && priv->band == MT2266_VHF)
|
||
|
|
mt2266_writereg(priv, 0x05, 0x62);
|
||
|
|
|
||
|
|
priv->band = band;
|
||
|
|
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void mt2266_calibrate(struct mt2266_priv *priv)
|
||
|
|
{
|
||
|
|
mt2266_writereg(priv, 0x11, 0x03);
|
||
|
|
mt2266_writereg(priv, 0x11, 0x01);
|
||
|
|
mt2266_writeregs(priv, mt2266_init1, sizeof(mt2266_init1));
|
||
|
|
mt2266_writeregs(priv, mt2266_init2, sizeof(mt2266_init2));
|
||
|
|
mt2266_writereg(priv, 0x33, 0x5e);
|
||
|
|
mt2266_writereg(priv, 0x10, 0x10);
|
||
|
|
mt2266_writereg(priv, 0x10, 0x00);
|
||
|
|
mt2266_writeregs(priv, mt2266_init_8mhz, sizeof(mt2266_init_8mhz));
|
||
|
|
msleep(25);
|
||
|
|
mt2266_writereg(priv, 0x17, 0x6d);
|
||
|
|
mt2266_writereg(priv, 0x1c, 0x00);
|
||
|
|
msleep(75);
|
||
|
|
mt2266_writereg(priv, 0x17, 0x6d);
|
||
|
|
mt2266_writereg(priv, 0x1c, 0xff);
|
||
|
|
}
|
||
|
|
|
||
|
|
static int mt2266_get_frequency(struct dvb_frontend *fe, u32 *frequency)
|
||
|
|
{
|
||
|
|
struct mt2266_priv *priv = fe->tuner_priv;
|
||
|
|
*frequency = priv->frequency;
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int mt2266_get_bandwidth(struct dvb_frontend *fe, u32 *bandwidth)
|
||
|
|
{
|
||
|
|
struct mt2266_priv *priv = fe->tuner_priv;
|
||
|
|
*bandwidth = priv->bandwidth;
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int mt2266_init(struct dvb_frontend *fe)
|
||
|
|
{
|
||
|
|
int ret;
|
||
|
|
struct mt2266_priv *priv = fe->tuner_priv;
|
||
|
|
ret = mt2266_writereg(priv, 0x17, 0x6d);
|
||
|
|
if (ret < 0)
|
||
|
|
return ret;
|
||
|
|
ret = mt2266_writereg(priv, 0x1c, 0xff);
|
||
|
|
if (ret < 0)
|
||
|
|
return ret;
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int mt2266_sleep(struct dvb_frontend *fe)
|
||
|
|
{
|
||
|
|
struct mt2266_priv *priv = fe->tuner_priv;
|
||
|
|
mt2266_writereg(priv, 0x17, 0x6d);
|
||
|
|
mt2266_writereg(priv, 0x1c, 0x00);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void mt2266_release(struct dvb_frontend *fe)
|
||
|
|
{
|
||
|
|
kfree(fe->tuner_priv);
|
||
|
|
fe->tuner_priv = NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
static const struct dvb_tuner_ops mt2266_tuner_ops = {
|
||
|
|
.info = {
|
||
|
|
.name = "Microtune MT2266",
|
||
|
|
.frequency_min_hz = 174 * MHz,
|
||
|
|
.frequency_max_hz = 862 * MHz,
|
||
|
|
.frequency_step_hz = 50 * kHz,
|
||
|
|
},
|
||
|
|
.release = mt2266_release,
|
||
|
|
.init = mt2266_init,
|
||
|
|
.sleep = mt2266_sleep,
|
||
|
|
.set_params = mt2266_set_params,
|
||
|
|
.get_frequency = mt2266_get_frequency,
|
||
|
|
.get_bandwidth = mt2266_get_bandwidth
|
||
|
|
};
|
||
|
|
|
||
|
|
struct dvb_frontend * mt2266_attach(struct dvb_frontend *fe, struct i2c_adapter *i2c, struct mt2266_config *cfg)
|
||
|
|
{
|
||
|
|
struct mt2266_priv *priv = NULL;
|
||
|
|
u8 id = 0;
|
||
|
|
|
||
|
|
priv = kzalloc(sizeof(struct mt2266_priv), GFP_KERNEL);
|
||
|
|
if (priv == NULL)
|
||
|
|
return NULL;
|
||
|
|
|
||
|
|
priv->cfg = cfg;
|
||
|
|
priv->i2c = i2c;
|
||
|
|
priv->band = MT2266_UHF;
|
||
|
|
|
||
|
|
if (mt2266_readreg(priv, 0, &id)) {
|
||
|
|
kfree(priv);
|
||
|
|
return NULL;
|
||
|
|
}
|
||
|
|
if (id != PART_REV) {
|
||
|
|
kfree(priv);
|
||
|
|
return NULL;
|
||
|
|
}
|
||
|
|
printk(KERN_INFO "MT2266: successfully identified\n");
|
||
|
|
memcpy(&fe->ops.tuner_ops, &mt2266_tuner_ops, sizeof(struct dvb_tuner_ops));
|
||
|
|
|
||
|
|
fe->tuner_priv = priv;
|
||
|
|
mt2266_calibrate(priv);
|
||
|
|
return fe;
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL(mt2266_attach);
|
||
|
|
|
||
|
|
MODULE_AUTHOR("Olivier DANET");
|
||
|
|
MODULE_DESCRIPTION("Microtune MT2266 silicon tuner driver");
|
||
|
|
MODULE_LICENSE("GPL");
|