314 lines
6.9 KiB
C
314 lines
6.9 KiB
C
/*
|
|
* Driver for Zarlink ZL10039 DVB-S tuner
|
|
*
|
|
* Copyright 2007 Jan D. Louw <jd.louw@mweb.co.za>
|
|
*
|
|
* 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/init.h>
|
|
#include <linux/string.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/dvb/frontend.h>
|
|
|
|
#include <media/dvb_frontend.h>
|
|
#include "zl10039.h"
|
|
|
|
static int debug;
|
|
|
|
/* Max transfer size done by I2C transfer functions */
|
|
#define MAX_XFER_SIZE 64
|
|
|
|
#define dprintk(args...) \
|
|
do { \
|
|
if (debug) \
|
|
printk(KERN_DEBUG args); \
|
|
} while (0)
|
|
|
|
enum zl10039_model_id {
|
|
ID_ZL10039 = 1
|
|
};
|
|
|
|
struct zl10039_state {
|
|
struct i2c_adapter *i2c;
|
|
u8 i2c_addr;
|
|
u8 id;
|
|
};
|
|
|
|
enum zl10039_reg_addr {
|
|
PLL0 = 0,
|
|
PLL1,
|
|
PLL2,
|
|
PLL3,
|
|
RFFE,
|
|
BASE0,
|
|
BASE1,
|
|
BASE2,
|
|
LO0,
|
|
LO1,
|
|
LO2,
|
|
LO3,
|
|
LO4,
|
|
LO5,
|
|
LO6,
|
|
GENERAL
|
|
};
|
|
|
|
static int zl10039_read(const struct zl10039_state *state,
|
|
const enum zl10039_reg_addr reg, u8 *buf,
|
|
const size_t count)
|
|
{
|
|
u8 regbuf[] = { reg };
|
|
struct i2c_msg msg[] = {
|
|
{/* Write register address */
|
|
.addr = state->i2c_addr,
|
|
.flags = 0,
|
|
.buf = regbuf,
|
|
.len = 1,
|
|
}, {/* Read count bytes */
|
|
.addr = state->i2c_addr,
|
|
.flags = I2C_M_RD,
|
|
.buf = buf,
|
|
.len = count,
|
|
},
|
|
};
|
|
|
|
dprintk("%s\n", __func__);
|
|
|
|
if (i2c_transfer(state->i2c, msg, 2) != 2) {
|
|
dprintk("%s: i2c read error\n", __func__);
|
|
return -EREMOTEIO;
|
|
}
|
|
|
|
return 0; /* Success */
|
|
}
|
|
|
|
static int zl10039_write(struct zl10039_state *state,
|
|
const enum zl10039_reg_addr reg, const u8 *src,
|
|
const size_t count)
|
|
{
|
|
u8 buf[MAX_XFER_SIZE];
|
|
struct i2c_msg msg = {
|
|
.addr = state->i2c_addr,
|
|
.flags = 0,
|
|
.buf = buf,
|
|
.len = count + 1,
|
|
};
|
|
|
|
if (1 + count > sizeof(buf)) {
|
|
printk(KERN_WARNING
|
|
"%s: i2c wr reg=%04x: len=%zu is too big!\n",
|
|
KBUILD_MODNAME, reg, count);
|
|
return -EINVAL;
|
|
}
|
|
|
|
dprintk("%s\n", __func__);
|
|
/* Write register address and data in one go */
|
|
buf[0] = reg;
|
|
memcpy(&buf[1], src, count);
|
|
if (i2c_transfer(state->i2c, &msg, 1) != 1) {
|
|
dprintk("%s: i2c write error\n", __func__);
|
|
return -EREMOTEIO;
|
|
}
|
|
|
|
return 0; /* Success */
|
|
}
|
|
|
|
static inline int zl10039_readreg(struct zl10039_state *state,
|
|
const enum zl10039_reg_addr reg, u8 *val)
|
|
{
|
|
return zl10039_read(state, reg, val, 1);
|
|
}
|
|
|
|
static inline int zl10039_writereg(struct zl10039_state *state,
|
|
const enum zl10039_reg_addr reg,
|
|
const u8 val)
|
|
{
|
|
const u8 tmp = val; /* see gcc.gnu.org/bugzilla/show_bug.cgi?id=81715 */
|
|
|
|
return zl10039_write(state, reg, &tmp, 1);
|
|
}
|
|
|
|
static int zl10039_init(struct dvb_frontend *fe)
|
|
{
|
|
struct zl10039_state *state = fe->tuner_priv;
|
|
int ret;
|
|
|
|
dprintk("%s\n", __func__);
|
|
if (fe->ops.i2c_gate_ctrl)
|
|
fe->ops.i2c_gate_ctrl(fe, 1);
|
|
/* Reset logic */
|
|
ret = zl10039_writereg(state, GENERAL, 0x40);
|
|
if (ret < 0) {
|
|
dprintk("Note: i2c write error normal when resetting the tuner\n");
|
|
}
|
|
/* Wake up */
|
|
ret = zl10039_writereg(state, GENERAL, 0x01);
|
|
if (ret < 0) {
|
|
dprintk("Tuner power up failed\n");
|
|
return ret;
|
|
}
|
|
if (fe->ops.i2c_gate_ctrl)
|
|
fe->ops.i2c_gate_ctrl(fe, 0);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int zl10039_sleep(struct dvb_frontend *fe)
|
|
{
|
|
struct zl10039_state *state = fe->tuner_priv;
|
|
int ret;
|
|
|
|
dprintk("%s\n", __func__);
|
|
if (fe->ops.i2c_gate_ctrl)
|
|
fe->ops.i2c_gate_ctrl(fe, 1);
|
|
ret = zl10039_writereg(state, GENERAL, 0x80);
|
|
if (ret < 0) {
|
|
dprintk("Tuner sleep failed\n");
|
|
return ret;
|
|
}
|
|
if (fe->ops.i2c_gate_ctrl)
|
|
fe->ops.i2c_gate_ctrl(fe, 0);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int zl10039_set_params(struct dvb_frontend *fe)
|
|
{
|
|
struct dtv_frontend_properties *c = &fe->dtv_property_cache;
|
|
struct zl10039_state *state = fe->tuner_priv;
|
|
u8 buf[6];
|
|
u8 bf;
|
|
u32 fbw;
|
|
u32 div;
|
|
int ret;
|
|
|
|
dprintk("%s\n", __func__);
|
|
dprintk("Set frequency = %d, symbol rate = %d\n",
|
|
c->frequency, c->symbol_rate);
|
|
|
|
/* Assumed 10.111 MHz crystal oscillator */
|
|
/* Cancelled num/den 80 to prevent overflow */
|
|
div = (c->frequency * 1000) / 126387;
|
|
fbw = (c->symbol_rate * 27) / 32000;
|
|
/* Cancelled num/den 10 to prevent overflow */
|
|
bf = ((fbw * 5088) / 1011100) - 1;
|
|
|
|
/*PLL divider*/
|
|
buf[0] = (div >> 8) & 0x7f;
|
|
buf[1] = (div >> 0) & 0xff;
|
|
/*Reference divider*/
|
|
/* Select reference ratio of 80 */
|
|
buf[2] = 0x1D;
|
|
/*PLL test modes*/
|
|
buf[3] = 0x40;
|
|
/*RF Control register*/
|
|
buf[4] = 0x6E; /* Bypass enable */
|
|
/*Baseband filter cutoff */
|
|
buf[5] = bf;
|
|
|
|
/* Open i2c gate */
|
|
if (fe->ops.i2c_gate_ctrl)
|
|
fe->ops.i2c_gate_ctrl(fe, 1);
|
|
/* BR = 10, Enable filter adjustment */
|
|
ret = zl10039_writereg(state, BASE1, 0x0A);
|
|
if (ret < 0)
|
|
goto error;
|
|
/* Write new config values */
|
|
ret = zl10039_write(state, PLL0, buf, sizeof(buf));
|
|
if (ret < 0)
|
|
goto error;
|
|
/* BR = 10, Disable filter adjustment */
|
|
ret = zl10039_writereg(state, BASE1, 0x6A);
|
|
if (ret < 0)
|
|
goto error;
|
|
|
|
/* Close i2c gate */
|
|
if (fe->ops.i2c_gate_ctrl)
|
|
fe->ops.i2c_gate_ctrl(fe, 0);
|
|
return 0;
|
|
error:
|
|
dprintk("Error setting tuner\n");
|
|
return ret;
|
|
}
|
|
|
|
static void zl10039_release(struct dvb_frontend *fe)
|
|
{
|
|
struct zl10039_state *state = fe->tuner_priv;
|
|
|
|
dprintk("%s\n", __func__);
|
|
kfree(state);
|
|
fe->tuner_priv = NULL;
|
|
}
|
|
|
|
static const struct dvb_tuner_ops zl10039_ops = {
|
|
.release = zl10039_release,
|
|
.init = zl10039_init,
|
|
.sleep = zl10039_sleep,
|
|
.set_params = zl10039_set_params,
|
|
};
|
|
|
|
struct dvb_frontend *zl10039_attach(struct dvb_frontend *fe,
|
|
u8 i2c_addr, struct i2c_adapter *i2c)
|
|
{
|
|
struct zl10039_state *state = NULL;
|
|
|
|
dprintk("%s\n", __func__);
|
|
state = kmalloc(sizeof(struct zl10039_state), GFP_KERNEL);
|
|
if (state == NULL)
|
|
goto error;
|
|
|
|
state->i2c = i2c;
|
|
state->i2c_addr = i2c_addr;
|
|
|
|
/* Open i2c gate */
|
|
if (fe->ops.i2c_gate_ctrl)
|
|
fe->ops.i2c_gate_ctrl(fe, 1);
|
|
/* check if this is a valid tuner */
|
|
if (zl10039_readreg(state, GENERAL, &state->id) < 0) {
|
|
/* Close i2c gate */
|
|
if (fe->ops.i2c_gate_ctrl)
|
|
fe->ops.i2c_gate_ctrl(fe, 0);
|
|
goto error;
|
|
}
|
|
/* Close i2c gate */
|
|
if (fe->ops.i2c_gate_ctrl)
|
|
fe->ops.i2c_gate_ctrl(fe, 0);
|
|
|
|
state->id = state->id & 0x0f;
|
|
switch (state->id) {
|
|
case ID_ZL10039:
|
|
strcpy(fe->ops.tuner_ops.info.name,
|
|
"Zarlink ZL10039 DVB-S tuner");
|
|
break;
|
|
default:
|
|
dprintk("Chip ID=%x does not match a known type\n", state->id);
|
|
goto error;
|
|
}
|
|
|
|
memcpy(&fe->ops.tuner_ops, &zl10039_ops, sizeof(struct dvb_tuner_ops));
|
|
fe->tuner_priv = state;
|
|
dprintk("Tuner attached @ i2c address 0x%02x\n", i2c_addr);
|
|
return fe;
|
|
error:
|
|
kfree(state);
|
|
return NULL;
|
|
}
|
|
EXPORT_SYMBOL(zl10039_attach);
|
|
|
|
module_param(debug, int, 0644);
|
|
MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
|
|
MODULE_DESCRIPTION("Zarlink ZL10039 DVB-S tuner driver");
|
|
MODULE_AUTHOR("Jan D. Louw <jd.louw@mweb.co.za>");
|
|
MODULE_LICENSE("GPL");
|