// SPDX-License-Identifier: GPL-2.0-only
/*
* i2c tv tuner chip device driver
* core core , i . e . kernel interfaces , registering and so on
*
* Copyright ( c ) by Ralph Metzler , Gerd Knorr , Gunther Mayer
*
* Copyright ( c ) 2005 - 2011 by Mauro Carvalho Chehab
* - Added support for a separate Radio tuner
* - Major rework and cleanups at the code
*
* This driver supports many devices and the idea is to let the driver
* detect which device is present . So rather than listing all supported
* devices here , we pretend to support a single , fake device type that will
* handle both radio and analog TV tuning .
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/timer.h>
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/slab.h>
#include <linux/poll.h>
#include <linux/i2c.h>
#include <linux/types.h>
#include <linux/init.h>
#include <linux/videodev2.h>
#include <media/tuner.h>
#include <media/tuner-types.h>
#include <media/v4l2-device.h>
#include <media/v4l2-ioctl.h>
#include "mt20xx.h"
#include "tda8290.h"
#include "tea5761.h"
#include "tea5767.h"
#include "xc2028.h"
#include "tuner-simple.h"
#include "tda9887.h"
#include "xc5000.h"
#include "tda18271.h"
#include "xc4000.h"
#define UNSET (-1 U)
/*
* Driver modprobe parameters
*/
/* insmod options used at init time => read/only */
static unsigned int addr;
static unsigned int no_autodetect;
static unsigned int show_i2c;
module_param(addr, int , 0444 );
module_param(no_autodetect, int , 0444 );
module_param(show_i2c, int , 0444 );
/* insmod options used at runtime => read/write */
static int tuner_debug;
static unsigned int tv_range[2 ] = { 44 , 958 };
static unsigned int radio_range[2 ] = { 65 , 108 };
static char pal[] = "--" ;
static char secam[] = "--" ;
static char ntsc[] = "-" ;
module_param_named(debug, tuner_debug, int , 0644 );
module_param_array(tv_range, int , NULL, 0644 );
module_param_array(radio_range, int , NULL, 0644 );
module_param_string(pal, pal, sizeof (pal), 0644 );
module_param_string(secam, secam, sizeof (secam), 0644 );
module_param_string(ntsc, ntsc, sizeof (ntsc), 0644 );
/*
* Static vars
*/
static LIST_HEAD(tuner_list);
static const struct v4l2_subdev_ops tuner_ops;
/*
* Debug macros
*/
#undef pr_fmt
#define pr_fmt(fmt) KBUILD_MODNAME ": %d-%04x: " fmt, \
i2c_adapter_id(t->i2c->adapter), t->i2c->addr
#define dprintk(fmt, arg...) do { \
if (tuner_debug) \
printk(KERN_DEBUG pr_fmt("%s: " fmt), __func__, ## arg); \
} while (0 )
/*
* Internal enums / struct used inside the driver
*/
/**
* enum tuner_pad_index - tuner pad index for MEDIA_ENT_F_TUNER
*
* @ TUNER_PAD_RF_INPUT :
* Radiofrequency ( RF ) sink pad , usually linked to a RF connector entity .
* @ TUNER_PAD_OUTPUT :
* tuner video output source pad . Contains the video chrominance
* and luminance or the hole bandwidth of the signal converted to
* an Intermediate Frequency ( IF ) or to baseband ( on zero - IF tuners ) .
* @ TUNER_PAD_AUD_OUT :
* Tuner audio output source pad . Tuners used to decode analog TV
* signals have an extra pad for audio output . Old tuners use an
* analog stage with a saw filter for the audio IF frequency . The
* output of the pad is , in this case , the audio IF , with should be
* decoded either by the bridge chipset ( that ' s the case of cx2388x
* chipsets ) or may require an external IF sound processor , like
* msp34xx . On modern silicon tuners , the audio IF decoder is usually
* incorporated at the tuner . On such case , the output of this pad
* is an audio sampled data .
* @ TUNER_NUM_PADS :
* Number of pads of the tuner .
*/
enum tuner_pad_index {
TUNER_PAD_RF_INPUT,
TUNER_PAD_OUTPUT,
TUNER_PAD_AUD_OUT,
TUNER_NUM_PADS
};
/**
* enum if_vid_dec_pad_index - video IF - PLL pad index
* for MEDIA_ENT_F_IF_VID_DECODER
*
* @ IF_VID_DEC_PAD_IF_INPUT :
* video Intermediate Frequency ( IF ) sink pad
* @ IF_VID_DEC_PAD_OUT :
* IF - PLL video output source pad . Contains the video chrominance
* and luminance IF signals .
* @ IF_VID_DEC_PAD_NUM_PADS :
* Number of pads of the video IF - PLL .
*/
enum if_vid_dec_pad_index {
IF_VID_DEC_PAD_IF_INPUT,
IF_VID_DEC_PAD_OUT,
IF_VID_DEC_PAD_NUM_PADS
};
struct tuner {
/* device */
struct dvb_frontend fe;
struct i2c_client *i2c;
struct v4l2_subdev sd;
struct list_head list;
/* keep track of the current settings */
v4l2_std_id std;
unsigned int tv_freq;
unsigned int radio_freq;
unsigned int audmode;
enum v4l2_tuner_type mode;
unsigned int mode_mask; /* Combination of allowable modes */
bool standby; /* Standby mode */
unsigned int type; /* chip type id */
void *config;
const char *name;
#if defined (CONFIG_MEDIA_CONTROLLER)
struct media_pad pad[TUNER_NUM_PADS];
#endif
};
/*
* Function prototypes
*/
static void set_tv_freq(struct i2c_client *c, unsigned int freq);
static void set_radio_freq(struct i2c_client *c, unsigned int freq);
/*
* tuner attach / detach logic
*/
/* This macro allows us to probe dynamically, avoiding static links */
#ifdef CONFIG_MEDIA_ATTACH
#define tuner_symbol_probe(FUNCTION, ARGS...) ({ \
int __r = -EINVAL; \
typeof(&FUNCTION) __a = symbol_request(FUNCTION); \
if (__a) { \
__r = (int ) __a(ARGS); \
symbol_put(FUNCTION); \
} else { \
printk(KERN_ERR "TUNER: Unable to find " \
"symbol " #FUNCTION "()\n" ); \
} \
__r; \
})
static void tuner_detach(struct dvb_frontend *fe)
{
if (fe->ops.tuner_ops.release) {
fe->ops.tuner_ops.release(fe);
symbol_put_addr(fe->ops.tuner_ops.release);
}
if (fe->ops.analog_ops.release) {
fe->ops.analog_ops.release(fe);
symbol_put_addr(fe->ops.analog_ops.release);
}
}
#else
#define tuner_symbol_probe(FUNCTION, ARGS...) ({ \
FUNCTION(ARGS); \
})
static void tuner_detach(struct dvb_frontend *fe)
{
if (fe->ops.tuner_ops.release)
fe->ops.tuner_ops.release(fe);
if (fe->ops.analog_ops.release)
fe->ops.analog_ops.release(fe);
}
#endif
static inline struct tuner *to_tuner(struct v4l2_subdev *sd)
{
return container_of(sd, struct tuner, sd);
}
/*
* struct analog_demod_ops callbacks
*/
static void fe_set_params(struct dvb_frontend *fe,
struct analog_parameters *params)
{
struct dvb_tuner_ops *fe_tuner_ops = &fe->ops.tuner_ops;
struct tuner *t = fe->analog_demod_priv;
if (NULL == fe_tuner_ops->set_analog_params) {
pr_warn("Tuner frontend module has no way to set freq\n" );
return ;
}
fe_tuner_ops->set_analog_params(fe, params);
}
static void fe_standby(struct dvb_frontend *fe)
{
struct dvb_tuner_ops *fe_tuner_ops = &fe->ops.tuner_ops;
if (fe_tuner_ops->sleep)
fe_tuner_ops->sleep(fe);
}
static int fe_set_config(struct dvb_frontend *fe, void *priv_cfg)
{
struct dvb_tuner_ops *fe_tuner_ops = &fe->ops.tuner_ops;
struct tuner *t = fe->analog_demod_priv;
if (fe_tuner_ops->set_config)
return fe_tuner_ops->set_config(fe, priv_cfg);
pr_warn("Tuner frontend module has no way to set config\n" );
return 0 ;
}
static void tuner_status(struct dvb_frontend *fe);
static const struct analog_demod_ops tuner_analog_ops = {
.set_params = fe_set_params,
.standby = fe_standby,
.set_config = fe_set_config,
.tuner_status = tuner_status
};
/*
* Functions to select between radio and TV and tuner probe / remove functions
*/
/**
* set_type - Sets the tuner type for a given device
*
* @ c : i2c_client descriptor
* @ type : type of the tuner ( e . g . tuner number )
* @ new_mode_mask : Indicates if tuner supports TV and / or Radio
* @ new_config : an optional parameter used by a few tuners to adjust
* internal parameters , like LNA mode
* @ tuner_callback : an optional function to be called when switching
* to analog mode
*
* This function applies the tuner config to tuner specified
* by tun_setup structure . It contains several per - tuner initialization " magic "
*/
static void set_type(struct i2c_client *c, unsigned int type,
unsigned int new_mode_mask, void *new_config,
int (*tuner_callback) (void *dev, int component, int cmd, int arg))
{
struct tuner *t = to_tuner(i2c_get_clientdata(c));
struct dvb_tuner_ops *fe_tuner_ops = &t->fe.ops.tuner_ops;
struct analog_demod_ops *analog_ops = &t->fe.ops.analog_ops;
unsigned char buffer[4 ];
int tune_now = 1 ;
if (type == UNSET || type == TUNER_ABSENT) {
dprintk("tuner 0x%02x: Tuner type absent\n" , c->addr);
return ;
}
t->type = type;
t->config = new_config;
if (tuner_callback != NULL) {
dprintk("defining GPIO callback\n" );
t->fe.callback = tuner_callback;
}
/* discard private data, in case set_type() was previously called */
tuner_detach(&t->fe);
t->fe.analog_demod_priv = NULL;
switch (t->type) {
case TUNER_MT2032:
if (!dvb_attach(microtune_attach,
&t->fe, t->i2c->adapter, t->i2c->addr))
goto attach_failed;
break ;
case TUNER_PHILIPS_TDA8290:
{
if (!dvb_attach(tda829x_attach, &t->fe, t->i2c->adapter,
t->i2c->addr, t->config))
goto attach_failed;
break ;
}
case TUNER_TEA5767:
if (!dvb_attach(tea5767_attach, &t->fe,
t->i2c->adapter, t->i2c->addr))
goto attach_failed;
t->mode_mask = T_RADIO;
break ;
case TUNER_TEA5761:
if (!dvb_attach(tea5761_attach, &t->fe,
t->i2c->adapter, t->i2c->addr))
goto attach_failed;
t->mode_mask = T_RADIO;
break ;
case TUNER_PHILIPS_FMD1216ME_MK3:
case TUNER_PHILIPS_FMD1216MEX_MK3:
buffer[0 ] = 0 x0b;
buffer[1 ] = 0 xdc;
buffer[2 ] = 0 x9c;
buffer[3 ] = 0 x60;
i2c_master_send(c, buffer, 4 );
mdelay(1 );
buffer[2 ] = 0 x86;
buffer[3 ] = 0 x54;
i2c_master_send(c, buffer, 4 );
if (!dvb_attach(simple_tuner_attach, &t->fe,
t->i2c->adapter, t->i2c->addr, t->type))
goto attach_failed;
break ;
case TUNER_PHILIPS_TD1316:
buffer[0 ] = 0 x0b;
buffer[1 ] = 0 xdc;
buffer[2 ] = 0 x86;
buffer[3 ] = 0 xa4;
i2c_master_send(c, buffer, 4 );
if (!dvb_attach(simple_tuner_attach, &t->fe,
t->i2c->adapter, t->i2c->addr, t->type))
goto attach_failed;
break ;
case TUNER_XC2028:
{
struct xc2028_config cfg = {
.i2c_adap = t->i2c->adapter,
.i2c_addr = t->i2c->addr,
};
if (!dvb_attach(xc2028_attach, &t->fe, &cfg))
goto attach_failed;
tune_now = 0 ;
break ;
}
case TUNER_TDA9887:
if (!dvb_attach(tda9887_attach,
&t->fe, t->i2c->adapter, t->i2c->addr))
goto attach_failed;
break ;
case TUNER_XC5000:
{
struct xc5000_config xc5000_cfg = {
.i2c_address = t->i2c->addr,
/* if_khz will be set at dvb_attach() */
.if_khz = 0 ,
};
if (!dvb_attach(xc5000_attach,
&t->fe, t->i2c->adapter, &xc5000_cfg))
goto attach_failed;
tune_now = 0 ;
break ;
}
case TUNER_XC5000C:
{
struct xc5000_config xc5000c_cfg = {
.i2c_address = t->i2c->addr,
/* if_khz will be set at dvb_attach() */
.if_khz = 0 ,
.chip_id = XC5000C,
};
if (!dvb_attach(xc5000_attach,
&t->fe, t->i2c->adapter, &xc5000c_cfg))
goto attach_failed;
tune_now = 0 ;
break ;
}
case TUNER_NXP_TDA18271:
{
struct tda18271_config cfg = {
.small_i2c = TDA18271_03_BYTE_CHUNK_INIT,
};
if (!dvb_attach(tda18271_attach, &t->fe, t->i2c->addr,
t->i2c->adapter, &cfg))
goto attach_failed;
tune_now = 0 ;
break ;
}
case TUNER_XC4000:
{
struct xc4000_config xc4000_cfg = {
.i2c_address = t->i2c->addr,
/* FIXME: the correct parameters will be set */
/* only when the digital dvb_attach() occurs */
.default_pm = 0 ,
.dvb_amplitude = 0 ,
.set_smoothedcvbs = 0 ,
.if_khz = 0
};
if (!dvb_attach(xc4000_attach,
&t->fe, t->i2c->adapter, &xc4000_cfg))
goto attach_failed;
tune_now = 0 ;
break ;
}
default :
if (!dvb_attach(simple_tuner_attach, &t->fe,
t->i2c->adapter, t->i2c->addr, t->type))
goto attach_failed;
break ;
}
if ((NULL == analog_ops->set_params) &&
(fe_tuner_ops->set_analog_params)) {
t->name = fe_tuner_ops->info.name;
t->fe.analog_demod_priv = t;
memcpy(analog_ops, &tuner_analog_ops,
sizeof (struct analog_demod_ops));
if (fe_tuner_ops->get_rf_strength)
analog_ops->has_signal = fe_tuner_ops->get_rf_strength;
if (fe_tuner_ops->get_afc)
analog_ops->get_afc = fe_tuner_ops->get_afc;
} else {
t->name = analog_ops->info.name;
}
#ifdef CONFIG_MEDIA_CONTROLLER
t->sd.entity.name = t->name;
#endif
dprintk("type set to %s\n" , t->name);
t->mode_mask = new_mode_mask;
/* Some tuners require more initialization setup before use,
such as firmware download or device calibration .
trying to set a frequency here will just fail
FIXME : better to move set_freq to the tuner code . This is needed
on analog tuners for PLL to properly work
*/
if (tune_now) {
if (V4L2_TUNER_RADIO == t->mode)
set_radio_freq(c, t->radio_freq);
else
set_tv_freq(c, t->tv_freq);
}
dprintk("%s %s I2C addr 0x%02x with type %d used for 0x%02x\n" ,
c->adapter->name, c->dev.driver->name, c->addr << 1 , type,
t->mode_mask);
return ;
attach_failed:
dprintk("Tuner attach for type = %d failed.\n" , t->type);
t->type = TUNER_ABSENT;
return ;
}
/**
* tuner_s_type_addr - Sets the tuner type for a device
*
* @ sd : subdev descriptor
* @ tun_setup : type to be associated to a given tuner i2c address
*
* This function applies the tuner config to tuner specified
* by tun_setup structure .
* If tuner I2C address is UNSET , then it will only set the device
* if the tuner supports the mode specified in the call .
* If the address is specified , the change will be applied only if
* tuner I2C address matches .
* The call can change the tuner number and the tuner mode .
*/
static int tuner_s_type_addr(struct v4l2_subdev *sd,
struct tuner_setup *tun_setup)
{
struct tuner *t = to_tuner(sd);
struct i2c_client *c = v4l2_get_subdevdata(sd);
dprintk("Calling set_type_addr for type=%d, addr=0x%02x, mode=0x%02x, config=%p\n" ,
tun_setup->type,
tun_setup->addr,
tun_setup->mode_mask,
tun_setup->config);
if ((t->type == UNSET && ((tun_setup->addr == ADDR_UNSET) &&
(t->mode_mask & tun_setup->mode_mask))) ||
(tun_setup->addr == c->addr)) {
set_type(c, tun_setup->type, tun_setup->mode_mask,
tun_setup->config, tun_setup->tuner_callback);
} else
dprintk("set addr discarded for type %i, mask %x. Asked to change tuner at addr 0x%02x, with mask %x\n" ,
t->type, t->mode_mask,
tun_setup->addr, tun_setup->mode_mask);
return 0 ;
}
/**
* tuner_s_config - Sets tuner configuration
*
* @ sd : subdev descriptor
* @ cfg : tuner configuration
*
* Calls tuner set_config ( ) private function to set some tuner - internal
* parameters
*/
static int tuner_s_config(struct v4l2_subdev *sd,
const struct v4l2_priv_tun_config *cfg)
{
struct tuner *t = to_tuner(sd);
struct analog_demod_ops *analog_ops = &t->fe.ops.analog_ops;
if (t->type != cfg->tuner)
return 0 ;
if (analog_ops->set_config) {
analog_ops->set_config(&t->fe, cfg->priv);
return 0 ;
}
dprintk("Tuner frontend module has no way to set config\n" );
return 0 ;
}
/**
* tuner_lookup - Seek for tuner adapters
*
* @ adap : i2c_adapter struct
* @ radio : pointer to be filled if the adapter is radio
* @ tv : pointer to be filled if the adapter is TV
*
* Search for existing radio and / or TV tuners on the given I2C adapter ,
* discarding demod - only adapters ( tda9887 ) .
*
* Note that when this function is called from tuner_probe you can be
* certain no other devices will be added / deleted at the same time , I2C
* core protects against that .
*/
static void tuner_lookup(struct i2c_adapter *adap,
struct tuner **radio, struct tuner **tv)
{
struct tuner *pos;
*radio = NULL;
*tv = NULL;
list_for_each_entry(pos, &tuner_list, list) {
int mode_mask;
if (pos->i2c->adapter != adap ||
strcmp(pos->i2c->dev.driver->name, "tuner" ))
continue ;
mode_mask = pos->mode_mask;
if (*radio == NULL && mode_mask == T_RADIO)
*radio = pos;
/* Note: currently TDA9887 is the only demod-only
device . If other devices appear then we need to
make this test more general. */
else if (*tv == NULL && pos->type != TUNER_TDA9887 &&
(pos->mode_mask & T_ANALOG_TV))
*tv = pos;
}
}
/**
* tuner_probe - Probes the existing tuners on an I2C bus
*
* @ client : i2c_client descriptor
*
* This routine probes for tuners at the expected I2C addresses . On most
* cases , if a device answers to a given I2C address , it assumes that the
* device is a tuner . On a few cases , however , an additional logic is needed
* to double check if the device is really a tuner , or to identify the tuner
* type , like on tea5767 / 5761 devices .
*
* During client attach , set_type is called by adapter ' s attach_inform callback .
* set_type must then be completed by tuner_probe .
*/
static int tuner_probe(struct i2c_client *client)
{
struct tuner *t;
struct tuner *radio;
struct tuner *tv;
#ifdef CONFIG_MEDIA_CONTROLLER
int ret;
#endif
t = kzalloc(sizeof (struct tuner), GFP_KERNEL);
if (NULL == t)
return -ENOMEM;
v4l2_i2c_subdev_init(&t->sd, client, &tuner_ops);
t->i2c = client;
t->name = "(tuner unset)" ;
t->type = UNSET;
t->audmode = V4L2_TUNER_MODE_STEREO;
t->standby = true ;
t->radio_freq = 87 .5 * 16000 ; /* Initial freq range */
t->tv_freq = 400 * 16 ; /* Sets freq to VHF High - needed for some PLL's to properly start */
if (show_i2c) {
unsigned char buffer[16 ];
int rc;
memset(buffer, 0 , sizeof (buffer));
rc = i2c_master_recv(client, buffer, sizeof (buffer));
if (rc >= 0 )
pr_info("I2C RECV = %*ph\n" , rc, buffer);
}
/* autodetection code based on the i2c addr */
if (!no_autodetect) {
switch (client->addr) {
case 0 x10:
if (tuner_symbol_probe(tea5761_autodetection,
t->i2c->adapter,
t->i2c->addr) >= 0 ) {
t->type = TUNER_TEA5761;
t->mode_mask = T_RADIO;
tuner_lookup(t->i2c->adapter, &radio, &tv);
if (tv)
tv->mode_mask &= ~T_RADIO;
goto register_client;
}
kfree(t);
return -ENODEV;
case 0 x42:
case 0 x43:
case 0 x4a:
case 0 x4b:
/* If chip is not tda8290, don't register.
since it can be tda9887*/
if (tuner_symbol_probe(tda829x_probe, t->i2c->adapter,
t->i2c->addr) >= 0 ) {
dprintk("tda829x detected\n" );
} else {
/* Default is being tda9887 */
t->type = TUNER_TDA9887;
t->mode_mask = T_RADIO | T_ANALOG_TV;
goto register_client;
}
break ;
case 0 x60:
if (tuner_symbol_probe(tea5767_autodetection,
t->i2c->adapter, t->i2c->addr)
>= 0 ) {
t->type = TUNER_TEA5767;
t->mode_mask = T_RADIO;
/* Sets freq to FM range */
tuner_lookup(t->i2c->adapter, &radio, &tv);
if (tv)
tv->mode_mask &= ~T_RADIO;
goto register_client;
}
break ;
}
}
/* Initializes only the first TV tuner on this adapter. Why only the
first ? Because there are some devices ( notably the ones with TI
tuners ) that have more than one i2c address for the * same * device .
Experience shows that , except for just one case , the first
address is the right one . The exception is a Russian tuner
( ACORP_Y878F ) . So , the desired behavior is just to enable the
first found TV tuner. */
tuner_lookup(t->i2c->adapter, &radio, &tv);
if (tv == NULL) {
t->mode_mask = T_ANALOG_TV;
if (radio == NULL)
t->mode_mask |= T_RADIO;
dprintk("Setting mode_mask to 0x%02x\n" , t->mode_mask);
}
/* Should be just before return */
register_client:
#if defined (CONFIG_MEDIA_CONTROLLER)
t->sd.entity.name = t->name;
/*
* Handle the special case where the tuner has actually
* two stages : the PLL to tune into a frequency and the
* IF - PLL demodulator ( tda988x ) .
*/
if (t->type == TUNER_TDA9887) {
t->pad[IF_VID_DEC_PAD_IF_INPUT].flags = MEDIA_PAD_FL_SINK;
t->pad[IF_VID_DEC_PAD_IF_INPUT].sig_type = PAD_SIGNAL_ANALOG;
t->pad[IF_VID_DEC_PAD_OUT].flags = MEDIA_PAD_FL_SOURCE;
t->pad[IF_VID_DEC_PAD_OUT].sig_type = PAD_SIGNAL_ANALOG;
ret = media_entity_pads_init(&t->sd.entity,
IF_VID_DEC_PAD_NUM_PADS,
&t->pad[0 ]);
t->sd.entity.function = MEDIA_ENT_F_IF_VID_DECODER;
} else {
t->pad[TUNER_PAD_RF_INPUT].flags = MEDIA_PAD_FL_SINK;
t->pad[TUNER_PAD_RF_INPUT].sig_type = PAD_SIGNAL_ANALOG;
t->pad[TUNER_PAD_OUTPUT].flags = MEDIA_PAD_FL_SOURCE;
t->pad[TUNER_PAD_OUTPUT].sig_type = PAD_SIGNAL_ANALOG;
t->pad[TUNER_PAD_AUD_OUT].flags = MEDIA_PAD_FL_SOURCE;
t->pad[TUNER_PAD_AUD_OUT].sig_type = PAD_SIGNAL_AUDIO;
ret = media_entity_pads_init(&t->sd.entity, TUNER_NUM_PADS,
&t->pad[0 ]);
t->sd.entity.function = MEDIA_ENT_F_TUNER;
}
if (ret < 0 ) {
pr_err("failed to initialize media entity!\n" );
kfree(t);
return ret;
}
#endif
/* Sets a default mode */
if (t->mode_mask & T_ANALOG_TV)
t->mode = V4L2_TUNER_ANALOG_TV;
else
t->mode = V4L2_TUNER_RADIO;
set_type(client, t->type, t->mode_mask, t->config, t->fe.callback);
list_add_tail(&t->list, &tuner_list);
pr_info("Tuner %d found with type(s)%s%s.\n" ,
t->type,
t->mode_mask & T_RADIO ? " Radio" : "" ,
t->mode_mask & T_ANALOG_TV ? " TV" : "" );
return 0 ;
}
/**
* tuner_remove - detaches a tuner
*
* @ client : i2c_client descriptor
*/
static void tuner_remove(struct i2c_client *client)
{
struct tuner *t = to_tuner(i2c_get_clientdata(client));
v4l2_device_unregister_subdev(&t->sd);
tuner_detach(&t->fe);
t->fe.analog_demod_priv = NULL;
list_del(&t->list);
kfree(t);
}
/*
* Functions to switch between Radio and TV
*
* A few cards have a separate I2C tuner for radio . Those routines
* take care of switching between TV / Radio mode , filtering only the
* commands that apply to the Radio or TV tuner .
*/
/**
* check_mode - Verify if tuner supports the requested mode
* @ t : a pointer to the module ' s internal struct_tuner
* @ mode : mode of the tuner , as defined by & enum v4l2_tuner_type .
*
* This function checks if the tuner is capable of tuning analog TV ,
* digital TV or radio , depending on what the caller wants . If the
* tuner can ' t support that mode , it returns - EINVAL . Otherwise , it
* returns 0 .
* This function is needed for boards that have a separate tuner for
* radio ( like devices with tea5767 ) .
*
* NOTE : mt20xx uses V4L2_TUNER_DIGITAL_TV and calls set_tv_freq to
* select a TV frequency . So , t_mode = T_ANALOG_TV could actually
* be used to represent a Digital TV too .
*/
static inline int check_mode(struct tuner *t, enum v4l2_tuner_type mode)
{
int t_mode;
if (mode == V4L2_TUNER_RADIO)
t_mode = T_RADIO;
else
t_mode = T_ANALOG_TV;
if ((t_mode & t->mode_mask) == 0 )
return -EINVAL;
return 0 ;
}
/**
* set_mode - Switch tuner to other mode .
* @ t : a pointer to the module ' s internal struct_tuner
* @ mode : enum v4l2_type ( radio or TV )
*
* If tuner doesn ' t support the needed mode ( radio or TV ) , prints a
* debug message and returns - EINVAL , changing its state to standby .
* Otherwise , changes the mode and returns 0 .
*/
static int set_mode(struct tuner *t, enum v4l2_tuner_type mode)
{
struct analog_demod_ops *analog_ops = &t->fe.ops.analog_ops;
if (mode != t->mode) {
if (check_mode(t, mode) == -EINVAL) {
dprintk("Tuner doesn't support mode %d. Putting tuner to sleep\n" ,
mode);
t->standby = true ;
if (analog_ops->standby)
analog_ops->standby(&t->fe);
return -EINVAL;
}
t->mode = mode;
dprintk("Changing to mode %d\n" , mode);
}
return 0 ;
}
/**
* set_freq - Set the tuner to the desired frequency .
* @ t : a pointer to the module ' s internal struct_tuner
* @ freq : frequency to set ( 0 means to use the current frequency )
*/
static void set_freq(struct tuner *t, unsigned int freq)
{
struct i2c_client *client = v4l2_get_subdevdata(&t->sd);
if (t->mode == V4L2_TUNER_RADIO) {
if (!freq)
freq = t->radio_freq;
set_radio_freq(client, freq);
} else {
if (!freq)
freq = t->tv_freq;
set_tv_freq(client, freq);
}
}
/*
* Functions that are specific for TV mode
*/
/**
* set_tv_freq - Set tuner frequency , freq in Units of 62 . 5 kHz = 1 / 16 MHz
*
* @ c : i2c_client descriptor
* @ freq : frequency
*/
static void set_tv_freq(struct i2c_client *c, unsigned int freq)
{
struct tuner *t = to_tuner(i2c_get_clientdata(c));
struct analog_demod_ops *analog_ops = &t->fe.ops.analog_ops;
struct analog_parameters params = {
.mode = t->mode,
.audmode = t->audmode,
.std = t->std
};
if (t->type == UNSET) {
pr_warn("tuner type not set\n" );
return ;
}
if (NULL == analog_ops->set_params) {
pr_warn("Tuner has no way to set tv freq\n" );
return ;
}
if (freq < tv_range[0 ] * 16 || freq > tv_range[1 ] * 16 ) {
dprintk("TV freq (%d.%02d) out of range (%d-%d)\n" ,
freq / 16 , freq % 16 * 100 / 16 , tv_range[0 ],
tv_range[1 ]);
/* V4L2 spec: if the freq is not possible then the closest
possible value should be selected */
if (freq < tv_range[0 ] * 16 )
freq = tv_range[0 ] * 16 ;
else
freq = tv_range[1 ] * 16 ;
}
params.frequency = freq;
dprintk("tv freq set to %d.%02d\n" ,
freq / 16 , freq % 16 * 100 / 16 );
t->tv_freq = freq;
t->standby = false ;
analog_ops->set_params(&t->fe, ¶ms);
}
/**
* tuner_fixup_std - force a given video standard variant
*
* @ t : tuner internal struct
* @ std : TV standard
*
* A few devices or drivers have problem to detect some standard variations .
* On other operational systems , the drivers generally have a per - country
* code , and some logic to apply per - country hacks . V4L2 API doesn ' t provide
* such hacks . Instead , it relies on a proper video standard selection from
* the userspace application . However , as some apps are buggy , not allowing
* to distinguish all video standard variations , a modprobe parameter can
* be used to force a video standard match .
*/
static v4l2_std_id tuner_fixup_std(struct tuner *t, v4l2_std_id std)
{
if (pal[0 ] != '-' && (std & V4L2_STD_PAL) == V4L2_STD_PAL) {
switch (pal[0 ]) {
case '6' :
return V4L2_STD_PAL_60;
case 'b' :
case 'B' :
case 'g' :
case 'G' :
return V4L2_STD_PAL_BG;
case 'i' :
case 'I' :
return V4L2_STD_PAL_I;
case 'd' :
case 'D' :
case 'k' :
case 'K' :
return V4L2_STD_PAL_DK;
case 'M' :
case 'm' :
return V4L2_STD_PAL_M;
case 'N' :
case 'n' :
if (pal[1 ] == 'c' || pal[1 ] == 'C' )
return V4L2_STD_PAL_Nc;
return V4L2_STD_PAL_N;
default :
pr_warn("pal= argument not recognised\n" );
break ;
}
}
if (secam[0 ] != '-' && (std & V4L2_STD_SECAM) == V4L2_STD_SECAM) {
switch (secam[0 ]) {
case 'b' :
case 'B' :
case 'g' :
case 'G' :
case 'h' :
case 'H' :
return V4L2_STD_SECAM_B |
V4L2_STD_SECAM_G |
V4L2_STD_SECAM_H;
case 'd' :
case 'D' :
case 'k' :
case 'K' :
return V4L2_STD_SECAM_DK;
case 'l' :
case 'L' :
if ((secam[1 ] == 'C' ) || (secam[1 ] == 'c' ))
return V4L2_STD_SECAM_LC;
return V4L2_STD_SECAM_L;
default :
pr_warn("secam= argument not recognised\n" );
break ;
}
}
if (ntsc[0 ] != '-' && (std & V4L2_STD_NTSC) == V4L2_STD_NTSC) {
switch (ntsc[0 ]) {
case 'm' :
case 'M' :
return V4L2_STD_NTSC_M;
case 'j' :
case 'J' :
return V4L2_STD_NTSC_M_JP;
case 'k' :
case 'K' :
return V4L2_STD_NTSC_M_KR;
default :
pr_info("ntsc= argument not recognised\n" );
break ;
}
}
return std;
}
/*
* Functions that are specific for Radio mode
*/
/**
* set_radio_freq - Set tuner frequency , freq in Units of 62 . 5 Hz = 1 / 16 kHz
*
* @ c : i2c_client descriptor
* @ freq : frequency
*/
static void set_radio_freq(struct i2c_client *c, unsigned int freq)
{
struct tuner *t = to_tuner(i2c_get_clientdata(c));
struct analog_demod_ops *analog_ops = &t->fe.ops.analog_ops;
struct analog_parameters params = {
.mode = t->mode,
.audmode = t->audmode,
.std = t->std
};
if (t->type == UNSET) {
pr_warn("tuner type not set\n" );
return ;
}
if (NULL == analog_ops->set_params) {
pr_warn("tuner has no way to set radio frequency\n" );
return ;
}
if (freq < radio_range[0 ] * 16000 || freq > radio_range[1 ] * 16000 ) {
dprintk("radio freq (%d.%02d) out of range (%d-%d)\n" ,
freq / 16000 , freq % 16000 * 100 / 16000 ,
radio_range[0 ], radio_range[1 ]);
/* V4L2 spec: if the freq is not possible then the closest
possible value should be selected */
if (freq < radio_range[0 ] * 16000 )
freq = radio_range[0 ] * 16000 ;
else
freq = radio_range[1 ] * 16000 ;
}
params.frequency = freq;
dprintk("radio freq set to %d.%02d\n" ,
freq / 16000 , freq % 16000 * 100 / 16000 );
t->radio_freq = freq;
t->standby = false ;
analog_ops->set_params(&t->fe, ¶ms);
/*
* The tuner driver might decide to change the audmode if it only
* supports stereo , so update t - > audmode .
*/
t->audmode = params.audmode;
}
/*
* Debug function for reporting tuner status to userspace
*/
/**
* tuner_status - Dumps the current tuner status at dmesg
* @ fe : pointer to struct dvb_frontend
*
* This callback is used only for driver debug purposes , answering to
* VIDIOC_LOG_STATUS . No changes should happen on this call .
*/
static void tuner_status(struct dvb_frontend *fe)
{
struct tuner *t = fe->analog_demod_priv;
unsigned long freq, freq_fraction;
struct dvb_tuner_ops *fe_tuner_ops = &fe->ops.tuner_ops;
struct analog_demod_ops *analog_ops = &fe->ops.analog_ops;
const char *p;
switch (t->mode) {
case V4L2_TUNER_RADIO:
p = "radio" ;
break ;
case V4L2_TUNER_DIGITAL_TV: /* Used by mt20xx */
p = "digital TV" ;
break ;
case V4L2_TUNER_ANALOG_TV:
default :
p = "analog TV" ;
break ;
}
if (t->mode == V4L2_TUNER_RADIO) {
freq = t->radio_freq / 16000 ;
freq_fraction = (t->radio_freq % 16000 ) * 100 / 16000 ;
} else {
freq = t->tv_freq / 16 ;
freq_fraction = (t->tv_freq % 16 ) * 100 / 16 ;
}
pr_info("Tuner mode: %s%s\n" , p,
t->standby ? " on standby mode" : "" );
pr_info("Frequency: %lu.%02lu MHz\n" , freq, freq_fraction);
pr_info("Standard: 0x%08lx\n" , (unsigned long )t->std);
if (t->mode != V4L2_TUNER_RADIO)
return ;
if (fe_tuner_ops->get_status) {
u32 tuner_status = 0 ;
fe_tuner_ops->get_status(&t->fe, &tuner_status);
if (tuner_status & TUNER_STATUS_LOCKED)
pr_info("Tuner is locked.\n" );
if (tuner_status & TUNER_STATUS_STEREO)
pr_info("Stereo: yes\n" );
}
if (analog_ops->has_signal) {
u16 signal;
if (!analog_ops->has_signal(fe, &signal))
pr_info("Signal strength: %hu\n" , signal);
}
}
/*
* Function to splicitly change mode to radio . Probably not needed anymore
*/
static int tuner_s_radio(struct v4l2_subdev *sd)
{
struct tuner *t = to_tuner(sd);
if (set_mode(t, V4L2_TUNER_RADIO) == 0 )
set_freq(t, 0 );
return 0 ;
}
/*
* Tuner callbacks to handle userspace ioctl ' s
*/
/**
* tuner_standby - places the tuner in standby mode
* @ sd : pointer to struct v4l2_subdev
*/
static int tuner_standby(struct v4l2_subdev *sd)
{
struct tuner *t = to_tuner(sd);
struct analog_demod_ops *analog_ops = &t->fe.ops.analog_ops;
dprintk("Putting tuner to sleep\n" );
t->standby = true ;
if (analog_ops->standby)
analog_ops->standby(&t->fe);
return 0 ;
}
static int tuner_s_std(struct v4l2_subdev *sd, v4l2_std_id std)
{
struct tuner *t = to_tuner(sd);
if (set_mode(t, V4L2_TUNER_ANALOG_TV))
return 0 ;
t->std = tuner_fixup_std(t, std);
if (t->std != std)
dprintk("Fixup standard %llx to %llx\n" , std, t->std);
set_freq(t, 0 );
return 0 ;
}
static int tuner_s_frequency(struct v4l2_subdev *sd, const struct v4l2_frequency *f)
{
struct tuner *t = to_tuner(sd);
if (set_mode(t, f->type) == 0 )
set_freq(t, f->frequency);
return 0 ;
}
/**
* tuner_g_frequency - Get the tuned frequency for the tuner
* @ sd : pointer to struct v4l2_subdev
* @ f : pointer to struct v4l2_frequency
*
* At return , the structure f will be filled with tuner frequency
* if the tuner matches the f - > type .
* Note : f - > type should be initialized before calling it .
* This is done by either video_ioctl2 or by the bridge driver .
*/
static int tuner_g_frequency(struct v4l2_subdev *sd, struct v4l2_frequency *f)
{
struct tuner *t = to_tuner(sd);
struct dvb_tuner_ops *fe_tuner_ops = &t->fe.ops.tuner_ops;
if (check_mode(t, f->type) == -EINVAL)
return 0 ;
if (f->type == t->mode && fe_tuner_ops->get_frequency && !t->standby) {
u32 abs_freq;
fe_tuner_ops->get_frequency(&t->fe, &abs_freq);
f->frequency = (V4L2_TUNER_RADIO == t->mode) ?
DIV_ROUND_CLOSEST(abs_freq * 2 , 125 ) :
DIV_ROUND_CLOSEST(abs_freq, 62500 );
} else {
f->frequency = (V4L2_TUNER_RADIO == f->type) ?
t->radio_freq : t->tv_freq;
}
return 0 ;
}
/**
* tuner_g_tuner - Fill in tuner information
* @ sd : pointer to struct v4l2_subdev
* @ vt : pointer to struct v4l2_tuner
*
* At return , the structure vt will be filled with tuner information
* if the tuner matches vt - > type .
* Note : vt - > type should be initialized before calling it .
* This is done by either video_ioctl2 or by the bridge driver .
*/
static int tuner_g_tuner(struct v4l2_subdev *sd, struct v4l2_tuner *vt)
{
struct tuner *t = to_tuner(sd);
struct analog_demod_ops *analog_ops = &t->fe.ops.analog_ops;
struct dvb_tuner_ops *fe_tuner_ops = &t->fe.ops.tuner_ops;
if (check_mode(t, vt->type) == -EINVAL)
return 0 ;
if (vt->type == t->mode && analog_ops->get_afc)
analog_ops->get_afc(&t->fe, &vt->afc);
if (vt->type == t->mode && analog_ops->has_signal) {
u16 signal = (u16)vt->signal;
if (!analog_ops->has_signal(&t->fe, &signal))
vt->signal = signal;
}
if (vt->type != V4L2_TUNER_RADIO) {
vt->capability |= V4L2_TUNER_CAP_NORM;
vt->rangelow = tv_range[0 ] * 16 ;
vt->rangehigh = tv_range[1 ] * 16 ;
return 0 ;
}
/* radio mode */
if (vt->type == t->mode) {
vt->rxsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO;
if (fe_tuner_ops->get_status) {
u32 tuner_status = 0 ;
fe_tuner_ops->get_status(&t->fe, &tuner_status);
vt->rxsubchans =
(tuner_status & TUNER_STATUS_STEREO) ?
V4L2_TUNER_SUB_STEREO :
V4L2_TUNER_SUB_MONO;
}
vt->audmode = t->audmode;
}
vt->capability |= V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO;
vt->rangelow = radio_range[0 ] * 16000 ;
vt->rangehigh = radio_range[1 ] * 16000 ;
return 0 ;
}
/**
* tuner_s_tuner - Set the tuner ' s audio mode
* @ sd : pointer to struct v4l2_subdev
* @ vt : pointer to struct v4l2_tuner
*
* Sets the audio mode if the tuner matches vt - > type .
* Note : vt - > type should be initialized before calling it .
* This is done by either video_ioctl2 or by the bridge driver .
*/
static int tuner_s_tuner(struct v4l2_subdev *sd, const struct v4l2_tuner *vt)
{
struct tuner *t = to_tuner(sd);
if (set_mode(t, vt->type))
return 0 ;
if (t->mode == V4L2_TUNER_RADIO) {
t->audmode = vt->audmode;
/*
* For radio audmode can only be mono or stereo . Map any
* other values to stereo . The actual tuner driver that is
* called in set_radio_freq can decide to limit the audmode to
* mono if only mono is supported .
*/
if (t->audmode != V4L2_TUNER_MODE_MONO &&
t->audmode != V4L2_TUNER_MODE_STEREO)
t->audmode = V4L2_TUNER_MODE_STEREO;
}
set_freq(t, 0 );
return 0 ;
}
static int tuner_log_status(struct v4l2_subdev *sd)
{
struct tuner *t = to_tuner(sd);
struct analog_demod_ops *analog_ops = &t->fe.ops.analog_ops;
if (analog_ops->tuner_status)
analog_ops->tuner_status(&t->fe);
return 0 ;
}
#ifdef CONFIG_PM_SLEEP
static int tuner_suspend(struct device *dev)
{
struct i2c_client *c = to_i2c_client(dev);
struct tuner *t = to_tuner(i2c_get_clientdata(c));
struct analog_demod_ops *analog_ops = &t->fe.ops.analog_ops;
dprintk("suspend\n" );
if (t->fe.ops.tuner_ops.suspend)
t->fe.ops.tuner_ops.suspend(&t->fe);
else if (!t->standby && analog_ops->standby)
analog_ops->standby(&t->fe);
return 0 ;
}
static int tuner_resume(struct device *dev)
{
struct i2c_client *c = to_i2c_client(dev);
struct tuner *t = to_tuner(i2c_get_clientdata(c));
dprintk("resume\n" );
if (t->fe.ops.tuner_ops.resume)
t->fe.ops.tuner_ops.resume(&t->fe);
else if (!t->standby)
if (set_mode(t, t->mode) == 0 )
set_freq(t, 0 );
return 0 ;
}
#endif
static int tuner_command(struct i2c_client *client, unsigned cmd, void *arg)
{
struct v4l2_subdev *sd = i2c_get_clientdata(client);
/* TUNER_SET_CONFIG is still called by tuner-simple.c, so we have
to handle it here .
There must be a better way of doing this... */
switch (cmd) {
case TUNER_SET_CONFIG:
return tuner_s_config(sd, arg);
}
return -ENOIOCTLCMD;
}
/*
* Callback structs
*/
static const struct v4l2_subdev_core_ops tuner_core_ops = {
.log_status = tuner_log_status,
};
static const struct v4l2_subdev_tuner_ops tuner_tuner_ops = {
.standby = tuner_standby,
.s_radio = tuner_s_radio,
.g_tuner = tuner_g_tuner,
.s_tuner = tuner_s_tuner,
.s_frequency = tuner_s_frequency,
.g_frequency = tuner_g_frequency,
.s_type_addr = tuner_s_type_addr,
.s_config = tuner_s_config,
};
static const struct v4l2_subdev_video_ops tuner_video_ops = {
.s_std = tuner_s_std,
};
static const struct v4l2_subdev_ops tuner_ops = {
.core = &tuner_core_ops,
.tuner = &tuner_tuner_ops,
.video = &tuner_video_ops,
};
/*
* I2C structs and module init functions
*/
static const struct dev_pm_ops tuner_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(tuner_suspend, tuner_resume)
};
static const struct i2c_device_id tuner_id[] = {
{ "tuner" , }, /* autodetect */
{ }
};
MODULE_DEVICE_TABLE(i2c, tuner_id);
static struct i2c_driver tuner_driver = {
.driver = {
.name = "tuner" ,
.pm = &tuner_pm_ops,
},
.probe = tuner_probe,
.remove = tuner_remove,
.command = tuner_command,
.id_table = tuner_id,
};
module_i2c_driver(tuner_driver);
MODULE_DESCRIPTION("device driver for various TV and TV+FM radio tuners" );
MODULE_AUTHOR("Ralph Metzler, Gerd Knorr, Gunther Mayer" );
MODULE_LICENSE("GPL" );
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