/*
Intersil ISL6423 SEC and LNB Power supply controller
Copyright (C) Manu Abraham <abraham.manu@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.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/string.h>
#include <linux/slab.h>
#include "dvb_frontend.h"
#include "isl6423.h"
static unsigned int verbose;
module_param(verbose, int, 0644);
MODULE_PARM_DESC(verbose, "Set Verbosity level");
#define FE_ERROR 0
#define FE_NOTICE 1
#define FE_INFO 2
#define FE_DEBUG 3
#define FE_DEBUGREG 4
#define dprintk(__y, __z, format, arg...) do { \
if (__z) { \
if ((verbose > FE_ERROR) && (verbose > __y)) \
printk(KERN_ERR "%s: " format "\n", __func__ , ##arg); \
else if ((verbose > FE_NOTICE) && (verbose > __y)) \
printk(KERN_NOTICE "%s: " format "\n", __func__ , ##arg); \
else if ((verbose > FE_INFO) && (verbose > __y)) \
printk(KERN_INFO "%s: " format "\n", __func__ , ##arg); \
else if ((verbose > FE_DEBUG) && (verbose > __y)) \
printk(KERN_DEBUG "%s: " format "\n", __func__ , ##arg); \
} else { \
if (verbose > __y) \
printk(format, ##arg); \
} \
} while (0)
struct isl6423_dev {
const struct isl6423_config *config;
struct i2c_adapter *i2c;
u8 reg_3;
u8 reg_4;
unsigned int verbose;
};
static int isl6423_write(struct isl6423_dev *isl6423, u8 reg)
{
struct i2c_adapter *i2c = isl6423->i2c;
u8 addr = isl6423->config->addr;
int err = 0;
struct i2c_msg msg = { .addr = addr, .flags = 0, .buf = ®, .len = 1 };
dprintk(FE_DEBUG, 1, "write reg %02X", reg);
err = i2c_transfer(i2c, &msg, 1);
if (err < 0)
goto exit;
return 0;
exit:
dprintk(FE_ERROR, 1, "I/O error <%d>", err);
return err;
}
static int isl6423_set_modulation(struct dvb_frontend *fe)
{
struct isl6423_dev *isl6423 = (struct isl6423_dev *) fe->sec_priv;
const struct isl6423_config *config = isl6423->config;
int err = 0;
u8 reg_2 = 0;
reg_2 = 0x01 << 5;
if (config->mod_extern)
reg_2 |= (1 << 3);
else
reg_2 |= (1 << 4);
err = isl6423_write(isl6423, reg_2);
if (err < 0)
goto exit;
return 0;
exit:
dprintk(FE_ERROR, 1, "I/O error <%d>", err);
return err;
}
static int isl6423_voltage_boost(struct dvb_frontend *fe, long arg)
{
struct isl6423_dev *isl6423 = (struct isl6423_dev *) fe->sec_priv;
u8 reg_3 = isl6423->reg_3;
u8 reg_4 = isl6423->reg_4;
int err = 0;
if (arg) {
/* EN = 1, VSPEN = 1, VBOT = 1 */
reg_4 |= (1 << 4);
reg_4 |= 0x1;
reg_3 |= (1 << 3);
} else {
/* EN = 1, VSPEN = 1, VBOT = 0 */
reg_4 |= (1 << 4);
reg_4 &= ~0x1;
reg_3 |= (1 << 3);
}
err = isl6423_write(isl6423, reg_3);
if (err < 0)
goto exit;
err = isl6423_write(isl6423, reg_4);
if (err < 0)
goto exit;
isl6423->reg_3 = reg_3;
isl6423->reg_4 = reg_4;
return 0;
exit:
dprintk(FE_ERROR, 1, "I/O error <%d>", err);
return err;
}
static int isl6423_set_voltage(struct dvb_frontend *fe,
enum fe_sec_voltage voltage)
{
struct isl6423_dev *isl6423 = (struct isl6423_dev *) fe->sec_priv;
u8 reg_3 = isl6423->reg_3;
u8 reg_4 = isl6423->reg_4;
int err = 0;
switch (voltage) {
case SEC_VOLTAGE_OFF:
/* EN = 0 */
reg_4 &= ~(1 << 4);
break;
case SEC_VOLTAGE_13:
/* EN = 1, VSPEN = 1, VTOP = 0, VBOT = 0 */
reg_4 |= (1 << 4);
reg_4 &= ~0x3;
reg_3 |= (1 << 3);
break;
case SEC_VOLTAGE_18:
/* EN = 1, VSPEN = 1, VTOP = 1, VBOT = 0 */
reg_4 |= (1 << 4);
reg_4 |= 0x2;
reg_4 &= ~0x1;
reg_3 |= (1 << 3);
break;
default:
break;
}
err = isl6423_write(isl6423, reg_3);
if (err < 0)
goto exit;
err = isl6423_write(isl6423, reg_4);
if (err < 0)
goto exit;
isl6423->reg_3 = reg_3;
isl6423->reg_4 = reg_4;
return 0;
exit:
dprintk(FE_ERROR, 1, "I/O error <%d>", err);
return err;
}
static int isl6423_set_current(struct dvb_frontend *fe)
{
struct isl6423_dev *isl6423 = (struct isl6423_dev *) fe->sec_priv;
u8 reg_3 = isl6423->reg_3;
const struct isl6423_config *config = isl6423->config;
int err = 0;
switch (config->current_max) {
case SEC_CURRENT_275m:
/* 275mA */
/* ISELH = 0, ISELL = 0 */
reg_3 &= ~0x3;
break;
case SEC_CURRENT_515m:
/* 515mA */
/* ISELH = 0, ISELL = 1 */
reg_3 &= ~0x2;
reg_3 |= 0x1;
break;
case SEC_CURRENT_635m:
/* 635mA */
/* ISELH = 1, ISELL = 0 */
reg_3 &= ~0x1;
reg_3 |= 0x2;
break;
case SEC_CURRENT_800m:
/* 800mA */
/* ISELH = 1, ISELL = 1 */
reg_3 |= 0x3;
break;
}
err = isl6423_write(isl6423, reg_3);
if (err < 0)
goto exit;
switch (config->curlim) {
case SEC_CURRENT_LIM_ON:
/* DCL = 0 */
reg_3 &= ~0x10;
break;
case SEC_CURRENT_LIM_OFF:
/* DCL = 1 */
reg_3 |= 0x10;
break;
}
err = isl6423_write(isl6423, reg_3);
if (err < 0)
goto exit;
isl6423->reg_3 = reg_3;
return 0;
exit:
dprintk(FE_ERROR, 1, "I/O error <%d>", err);
return err;
}
static void isl6423_release(struct dvb_frontend *fe)
{
isl6423_set_voltage(fe, SEC_VOLTAGE_OFF);
kfree(fe->sec_priv);
fe->sec_priv = NULL;
}
struct dvb_frontend *isl6423_attach(struct dvb_frontend *fe,
struct i2c_adapter *i2c,
const struct isl6423_config *config)
{
struct isl6423_dev *isl6423;
isl6423 = kzalloc(sizeof(struct isl6423_dev), GFP_KERNEL);
if (!isl6423)
return NULL;
isl6423->config = config;
isl6423->i2c = i2c;
fe->sec_priv = isl6423;
/* SR3H = 0, SR3M = 1, SR3L = 0 */
isl6423->reg_3 = 0x02 << 5;
/* SR4H = 0, SR4M = 1, SR4L = 1 */
isl6423->reg_4 = 0x03 << 5;
if (isl6423_set_current(fe))
goto exit;
if (isl6423_set_modulation(fe))
goto exit;
fe->ops.release_sec = isl6423_release;
fe->ops.set_voltage = isl6423_set_voltage;
fe->ops.enable_high_lnb_voltage = isl6423_voltage_boost;
isl6423->verbose = verbose;
return fe;
exit:
kfree(isl6423);
fe->sec_priv = NULL;
return NULL;
}
EXPORT_SYMBOL(isl6423_attach);
MODULE_DESCRIPTION("ISL6423 SEC");
MODULE_AUTHOR("Manu Abraham");
MODULE_LICENSE("GPL");
