mirror of
https://github.com/torvalds/linux.git
synced 2024-12-29 06:12:08 +00:00
0df1042751
Remove useless kfree() and clean up code related to the removal. The semantic patch that finds this problem is as follows: (http://coccinelle.lip6.fr/) // <smpl> @r exists@ position p1,p2; expression x; @@ if (x@p1 == NULL) { ... kfree@p2(x); ... return ...; } @unchanged exists@ position r.p1,r.p2; expression e <= r.x,x,e1; iterator I; statement S; @@ if (x@p1 == NULL) { ... when != I(x,...) S when != e = e1 when != e += e1 when != e -= e1 when != ++e when != --e when != e++ when != e-- when != &e kfree@p2(x); ... return ...; } @ok depends on unchanged exists@ position any r.p1; position r.p2; expression x; @@ ... when != true x@p1 == NULL kfree@p2(x); @depends on !ok && unchanged@ position r.p2; expression x; @@ *kfree@p2(x); // </smpl> Signed-off-by: Peter Senna Tschudin <peter.senna@gmail.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
255 lines
6.2 KiB
C
255 lines
6.2 KiB
C
/*
|
|
TDA665x tuner driver
|
|
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/init.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/slab.h>
|
|
|
|
#include "dvb_frontend.h"
|
|
#include "tda665x.h"
|
|
|
|
struct tda665x_state {
|
|
struct dvb_frontend *fe;
|
|
struct i2c_adapter *i2c;
|
|
const struct tda665x_config *config;
|
|
|
|
u32 frequency;
|
|
u32 bandwidth;
|
|
};
|
|
|
|
static int tda665x_read(struct tda665x_state *state, u8 *buf)
|
|
{
|
|
const struct tda665x_config *config = state->config;
|
|
int err = 0;
|
|
struct i2c_msg msg = { .addr = config->addr, .flags = I2C_M_RD, .buf = buf, .len = 2 };
|
|
|
|
err = i2c_transfer(state->i2c, &msg, 1);
|
|
if (err != 1)
|
|
goto exit;
|
|
|
|
return err;
|
|
exit:
|
|
printk(KERN_ERR "%s: I/O Error err=<%d>\n", __func__, err);
|
|
return err;
|
|
}
|
|
|
|
static int tda665x_write(struct tda665x_state *state, u8 *buf, u8 length)
|
|
{
|
|
const struct tda665x_config *config = state->config;
|
|
int err = 0;
|
|
struct i2c_msg msg = { .addr = config->addr, .flags = 0, .buf = buf, .len = length };
|
|
|
|
err = i2c_transfer(state->i2c, &msg, 1);
|
|
if (err != 1)
|
|
goto exit;
|
|
|
|
return err;
|
|
exit:
|
|
printk(KERN_ERR "%s: I/O Error err=<%d>\n", __func__, err);
|
|
return err;
|
|
}
|
|
|
|
static int tda665x_get_state(struct dvb_frontend *fe,
|
|
enum tuner_param param,
|
|
struct tuner_state *tstate)
|
|
{
|
|
struct tda665x_state *state = fe->tuner_priv;
|
|
int err = 0;
|
|
|
|
switch (param) {
|
|
case DVBFE_TUNER_FREQUENCY:
|
|
tstate->frequency = state->frequency;
|
|
break;
|
|
case DVBFE_TUNER_BANDWIDTH:
|
|
break;
|
|
default:
|
|
printk(KERN_ERR "%s: Unknown parameter (param=%d)\n", __func__, param);
|
|
err = -EINVAL;
|
|
break;
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
static int tda665x_get_status(struct dvb_frontend *fe, u32 *status)
|
|
{
|
|
struct tda665x_state *state = fe->tuner_priv;
|
|
u8 result = 0;
|
|
int err = 0;
|
|
|
|
*status = 0;
|
|
|
|
err = tda665x_read(state, &result);
|
|
if (err < 0)
|
|
goto exit;
|
|
|
|
if ((result >> 6) & 0x01) {
|
|
printk(KERN_DEBUG "%s: Tuner Phase Locked\n", __func__);
|
|
*status = 1;
|
|
}
|
|
|
|
return err;
|
|
exit:
|
|
printk(KERN_ERR "%s: I/O Error\n", __func__);
|
|
return err;
|
|
}
|
|
|
|
static int tda665x_set_state(struct dvb_frontend *fe,
|
|
enum tuner_param param,
|
|
struct tuner_state *tstate)
|
|
{
|
|
struct tda665x_state *state = fe->tuner_priv;
|
|
const struct tda665x_config *config = state->config;
|
|
u32 frequency, status = 0;
|
|
u8 buf[4];
|
|
int err = 0;
|
|
|
|
if (param & DVBFE_TUNER_FREQUENCY) {
|
|
|
|
frequency = tstate->frequency;
|
|
if ((frequency < config->frequency_max) || (frequency > config->frequency_min)) {
|
|
printk(KERN_ERR "%s: Frequency beyond limits, frequency=%d\n", __func__, frequency);
|
|
return -EINVAL;
|
|
}
|
|
|
|
frequency += config->frequency_offst;
|
|
frequency *= config->ref_multiplier;
|
|
frequency += config->ref_divider >> 1;
|
|
frequency /= config->ref_divider;
|
|
|
|
buf[0] = (u8) ((frequency & 0x7f00) >> 8);
|
|
buf[1] = (u8) (frequency & 0x00ff) >> 0;
|
|
buf[2] = 0x80 | 0x40 | 0x02;
|
|
buf[3] = 0x00;
|
|
|
|
/* restore frequency */
|
|
frequency = tstate->frequency;
|
|
|
|
if (frequency < 153000000) {
|
|
/* VHF-L */
|
|
buf[3] |= 0x01; /* fc, Low Band, 47 - 153 MHz */
|
|
if (frequency < 68000000)
|
|
buf[3] |= 0x40; /* 83uA */
|
|
if (frequency < 1040000000)
|
|
buf[3] |= 0x60; /* 122uA */
|
|
if (frequency < 1250000000)
|
|
buf[3] |= 0x80; /* 163uA */
|
|
else
|
|
buf[3] |= 0xa0; /* 254uA */
|
|
} else if (frequency < 438000000) {
|
|
/* VHF-H */
|
|
buf[3] |= 0x02; /* fc, Mid Band, 153 - 438 MHz */
|
|
if (frequency < 230000000)
|
|
buf[3] |= 0x40;
|
|
if (frequency < 300000000)
|
|
buf[3] |= 0x60;
|
|
else
|
|
buf[3] |= 0x80;
|
|
} else {
|
|
/* UHF */
|
|
buf[3] |= 0x04; /* fc, High Band, 438 - 862 MHz */
|
|
if (frequency < 470000000)
|
|
buf[3] |= 0x60;
|
|
if (frequency < 526000000)
|
|
buf[3] |= 0x80;
|
|
else
|
|
buf[3] |= 0xa0;
|
|
}
|
|
|
|
/* Set params */
|
|
err = tda665x_write(state, buf, 5);
|
|
if (err < 0)
|
|
goto exit;
|
|
|
|
/* sleep for some time */
|
|
printk(KERN_DEBUG "%s: Waiting to Phase LOCK\n", __func__);
|
|
msleep(20);
|
|
/* check status */
|
|
err = tda665x_get_status(fe, &status);
|
|
if (err < 0)
|
|
goto exit;
|
|
|
|
if (status == 1) {
|
|
printk(KERN_DEBUG "%s: Tuner Phase locked: status=%d\n", __func__, status);
|
|
state->frequency = frequency; /* cache successful state */
|
|
} else {
|
|
printk(KERN_ERR "%s: No Phase lock: status=%d\n", __func__, status);
|
|
}
|
|
} else {
|
|
printk(KERN_ERR "%s: Unknown parameter (param=%d)\n", __func__, param);
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
exit:
|
|
printk(KERN_ERR "%s: I/O Error\n", __func__);
|
|
return err;
|
|
}
|
|
|
|
static int tda665x_release(struct dvb_frontend *fe)
|
|
{
|
|
struct tda665x_state *state = fe->tuner_priv;
|
|
|
|
fe->tuner_priv = NULL;
|
|
kfree(state);
|
|
return 0;
|
|
}
|
|
|
|
static struct dvb_tuner_ops tda665x_ops = {
|
|
|
|
.set_state = tda665x_set_state,
|
|
.get_state = tda665x_get_state,
|
|
.get_status = tda665x_get_status,
|
|
.release = tda665x_release
|
|
};
|
|
|
|
struct dvb_frontend *tda665x_attach(struct dvb_frontend *fe,
|
|
const struct tda665x_config *config,
|
|
struct i2c_adapter *i2c)
|
|
{
|
|
struct tda665x_state *state = NULL;
|
|
struct dvb_tuner_info *info;
|
|
|
|
state = kzalloc(sizeof(struct tda665x_state), GFP_KERNEL);
|
|
if (!state)
|
|
return NULL;
|
|
|
|
state->config = config;
|
|
state->i2c = i2c;
|
|
state->fe = fe;
|
|
fe->tuner_priv = state;
|
|
fe->ops.tuner_ops = tda665x_ops;
|
|
info = &fe->ops.tuner_ops.info;
|
|
|
|
memcpy(info->name, config->name, sizeof(config->name));
|
|
info->frequency_min = config->frequency_min;
|
|
info->frequency_max = config->frequency_max;
|
|
info->frequency_step = config->frequency_offst;
|
|
|
|
printk(KERN_DEBUG "%s: Attaching TDA665x (%s) tuner\n", __func__, info->name);
|
|
|
|
return fe;
|
|
}
|
|
EXPORT_SYMBOL(tda665x_attach);
|
|
|
|
MODULE_DESCRIPTION("TDA665x driver");
|
|
MODULE_AUTHOR("Manu Abraham");
|
|
MODULE_LICENSE("GPL");
|