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yaml --- r: 179534 b: refs/heads/master c: 3e978a8 h: refs/heads/master v: v3
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Manu Abraham
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Mauro Carvalho Chehab
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Jan 17, 2010
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--- | ||
refs/heads/master: ad0ac434cb3b34640a4e81d7e80a1512c6e40253 | ||
refs/heads/master: 3e978a8284080d801d20cda377d9cf7c12fe68b9 |
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/* | ||
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. | ||
*/ | ||
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#include <linux/init.h> | ||
#include <linux/kernel.h> | ||
#include <linux/module.h> | ||
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#include "dvb_frontend.h" | ||
#include "tda665x.h" | ||
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struct tda665x_state { | ||
struct dvb_frontend *fe; | ||
struct i2c_adapter *i2c; | ||
const struct tda665x_config *config; | ||
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u32 frequency; | ||
u32 bandwidth; | ||
}; | ||
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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 }; | ||
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err = i2c_transfer(state->i2c, &msg, 1); | ||
if (err != 1) | ||
goto exit; | ||
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return err; | ||
exit: | ||
printk("%s: I/O Error err=<%d>\n", __func__, err); | ||
return err; | ||
} | ||
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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 }; | ||
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err = i2c_transfer(state->i2c, &msg, 1); | ||
if (err != 1) | ||
goto exit; | ||
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return err; | ||
exit: | ||
printk("%s: I/O Error err=<%d>\n", __func__, err); | ||
return err; | ||
} | ||
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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; | ||
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switch (param) { | ||
case DVBFE_TUNER_FREQUENCY: | ||
tstate->frequency = state->frequency; | ||
break; | ||
case DVBFE_TUNER_BANDWIDTH: | ||
break; | ||
default: | ||
printk("%s: Unknown parameter (param=%d)\n", __func__, param); | ||
err = -EINVAL; | ||
break; | ||
} | ||
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return err; | ||
} | ||
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static int tda665x_get_status(struct dvb_frontend *fe, u32 *status) | ||
{ | ||
struct tda665x_state *state = fe->tuner_priv; | ||
u8 result = 0; | ||
int err = 0; | ||
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*status = 0; | ||
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err = tda665x_read(state, &result); | ||
if (err < 0) | ||
goto exit; | ||
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if ((result >> 6) & 0x01) { | ||
printk("%s: Tuner Phase Locked\n", __func__); | ||
*status = 1; | ||
} | ||
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return err; | ||
exit: | ||
printk("%s: I/O Error\n", __func__); | ||
return err; | ||
} | ||
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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; | ||
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if (param & DVBFE_TUNER_FREQUENCY) { | ||
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frequency = tstate->frequency; | ||
if ((frequency < config->frequency_max) || (frequency > config->frequency_min)) { | ||
printk("%s: Frequency beyond limits, frequency=%d\n", __func__, frequency); | ||
return -EINVAL; | ||
} | ||
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frequency += config->frequency_offst; | ||
frequency *= config->ref_multiplier; | ||
frequency += config->ref_divider >> 1; | ||
frequency /= config->ref_divider; | ||
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buf[0] = (u8 ) (frequency & 0x7f00) >> 8; | ||
buf[1] = (u8 ) (frequency & 0x00ff) >> 0; | ||
buf[2] = 0x80 | 0x40 | 0x02; | ||
buf[3] = 0x00; | ||
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/* restore frequency */ | ||
frequency = tstate->frequency; | ||
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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; | ||
} | ||
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/* Set params */ | ||
err = tda665x_write(state, buf, 5); | ||
if (err < 0) | ||
goto exit; | ||
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/* sleep for some time */ | ||
printk("%s: Waiting to Phase LOCK\n", __func__); | ||
msleep(20); | ||
/* check status */ | ||
err = tda665x_get_status(fe, &status); | ||
if (err < 0) | ||
goto exit; | ||
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if (status == 1) { | ||
printk("%s: Tuner Phase locked: status=%d\n", __func__, status); | ||
state->frequency = frequency; /* cache successful state */ | ||
} else { | ||
printk("%s: No Phase lock: status=%d\n", __func__, status); | ||
} | ||
} else { | ||
printk("%s: Unknown parameter (param=%d)\n", __func__, param); | ||
return -EINVAL; | ||
} | ||
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return 0; | ||
exit: | ||
printk("%s: I/O Error\n", __func__); | ||
return err; | ||
} | ||
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static int tda665x_release(struct dvb_frontend *fe) | ||
{ | ||
struct tda665x_state *state = fe->tuner_priv; | ||
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fe->tuner_priv = NULL; | ||
kfree(state); | ||
return 0; | ||
} | ||
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static struct dvb_tuner_ops tda665x_ops = { | ||
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.set_state = tda665x_set_state, | ||
.get_state = tda665x_get_state, | ||
.get_status = tda665x_get_status, | ||
.release = tda665x_release | ||
}; | ||
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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; | ||
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state = kzalloc(sizeof (struct tda665x_state), GFP_KERNEL); | ||
if (state == NULL) | ||
goto exit; | ||
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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; | ||
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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; | ||
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printk("%s: Attaching TDA665x (%s) tuner\n", __func__, info->name); | ||
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return fe; | ||
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exit: | ||
kfree(state); | ||
return NULL; | ||
} | ||
EXPORT_SYMBOL(tda665x_attach); | ||
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MODULE_DESCRIPTION("TDA665x driver"); | ||
MODULE_AUTHOR("Manu Abraham"); | ||
MODULE_LICENSE("GPL"); |
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Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,52 @@ | ||
/* | ||
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. | ||
*/ | ||
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#ifndef __TDA665x_H | ||
#define __TDA665x_H | ||
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struct tda665x_config { | ||
char name[128]; | ||
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u8 addr; | ||
u32 frequency_min; | ||
u32 frequency_max; | ||
u32 frequency_offst; | ||
u32 ref_multiplier; | ||
u32 ref_divider; | ||
}; | ||
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#if defined(CONFIG_DVB_TDA665x) || (defined(CONFIG_DVB_TDA665x_MODULE) && defined(MODULE)) | ||
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extern struct dvb_frontend *tda665x_attach(struct dvb_frontend *fe, | ||
const struct tda665x_config *config, | ||
struct i2c_adapter *i2c); | ||
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#else | ||
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static inline struct dvb_frontend *tda665x_attach(struct dvb_frontend *fe, | ||
const struct tda665x_config *config, | ||
struct i2c_adapter *i2c) | ||
{ | ||
printk(KERN_WARNING "%s: Driver disabled by Kconfig\n", __func__); | ||
return NULL; | ||
} | ||
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#endif /* CONFIG_DVB_TDA665x */ | ||
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#endif /* __TDA665x_H */ |
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