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[media] tuner-core: Better implement standby mode 

In the past, T_STANDBY were used on devices with a separate radio tuner to
mark a tuner that were disabled. With the time, it got newer meanings.

Also, due to a bug at the logic, the driver might incorrectly return
T_STANDBY to userspace.

So, instead of keeping the abuse, just use a boolean for storing
such information.

We can't remove T_STANDBY yet, as this is used on two other drivers. A
latter patch will address its usage outside tuner-core.

Thanks-to: Devin Heitmueller <dheitmueller@kernellabs.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Mauro Carvalho Chehab 2011-02-04 10:42:09 -03:00
parent e2d25a2474
commit cbde689823
2 changed files with 95 additions and 95 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

189
drivers/media/video/tuner-core.c
View File

@ -115,9 +115,11 @@ struct tuner {
unsigned int radio_freq;
unsigned int audmode;
unsigned int mode;
enum v4l2_tuner_type mode;
unsigned int mode_mask; /* Combination of allowable modes */
bool standby; /* Standby mode */
unsigned int type; /* chip type id */
unsigned int config;
const char *name;
@ -262,12 +264,6 @@ static void set_type(struct i2c_client *c, unsigned int type,
t->fe.callback = tuner_callback;
}
if (t->mode == T_UNINITIALIZED) {
tuner_dbg ("tuner 0x%02x: called during i2c_client register by adapter's attach_inform\n", c->addr);
return;
}
/* discard private data, in case set_type() was previously called */
tuner_detach(&t->fe);
t->fe.analog_demod_priv = NULL;
@ -387,8 +383,7 @@ static void set_type(struct i2c_client *c, unsigned int type,
tuner_dbg("type set to %s\n", t->name);
if (t->mode_mask == T_UNINITIALIZED)
t->mode_mask = new_mode_mask;
t->mode_mask = new_mode_mask;
/* Some tuners require more initialization setup before use,
such as firmware download or device calibration.
@ -411,7 +406,6 @@ static void set_type(struct i2c_client *c, unsigned int type,
attach_failed:
tuner_dbg("Tuner attach for type = %d failed.\n", t->type);
t->type = TUNER_ABSENT;
t->mode_mask = T_UNINITIALIZED;
return;
}
@ -429,10 +423,10 @@ static void set_addr(struct i2c_client *c, struct tuner_setup *tun_setup)
struct tuner *t = to_tuner(i2c_get_clientdata(c));
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);
(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
tuner_dbg("set addr discarded for type %i, mask %x. "
"Asked to change tuner at addr 0x%02x, with mask %x\n",
@ -491,7 +485,8 @@ static void tuner_lookup(struct i2c_adapter *adap,
strcmp(pos->i2c->driver->driver.name, "tuner"))
continue;
mode_mask = pos->mode_mask & ~T_STANDBY;
mode_mask = pos->mode_mask;
pos->standby = 1;
if (*radio == NULL && mode_mask == T_RADIO)
*radio = pos;
/* Note: currently TDA9887 is the only demod-only
@ -521,7 +516,9 @@ static int tuner_probe(struct i2c_client *client,
t->name = "(tuner unset)";
t->type = UNSET;
t->audmode = V4L2_TUNER_MODE_STEREO;
t->mode_mask = T_UNINITIALIZED;
t->standby = 1;
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];
@ -544,9 +541,6 @@ static int tuner_probe(struct i2c_client *client,
t->i2c->addr) >= 0) {
t->type = TUNER_TEA5761;
t->mode_mask = T_RADIO;
t->mode = T_STANDBY;
/* Sets freq to FM range */
t->radio_freq = 87.5 * 16000;
tuner_lookup(t->i2c->adapter, &radio, &tv);
if (tv)
tv->mode_mask &= ~T_RADIO;
@ -569,7 +563,6 @@ static int tuner_probe(struct i2c_client *client,
t->type = TUNER_TDA9887;
t->mode_mask = T_RADIO | T_ANALOG_TV |
T_DIGITAL_TV;
t->mode = T_STANDBY;
goto register_client;
}
break;
@ -579,9 +572,7 @@ static int tuner_probe(struct i2c_client *client,
>= 0) {
t->type = TUNER_TEA5767;
t->mode_mask = T_RADIO;
t->mode = T_STANDBY;
/* Sets freq to FM range */
t->radio_freq = 87.5 * 16000;
tuner_lookup(t->i2c->adapter, &radio, &tv);
if (tv)
tv->mode_mask &= ~T_RADIO;
@ -605,15 +596,10 @@ static int tuner_probe(struct i2c_client *client,
if (radio == NULL)
t->mode_mask |= T_RADIO;
tuner_dbg("Setting mode_mask to 0x%02x\n", t->mode_mask);
t->tv_freq = 400 * 16; /* Sets freq to VHF High */
t->radio_freq = 87.5 * 16000; /* Sets freq to FM range */
}
/* Should be just before return */
register_client:
tuner_info("chip found @ 0x%x (%s)\n", client->addr << 1,
client->adapter->name);
/* Sets a default mode */
if (t->mode_mask & T_ANALOG_TV) {
t->mode = V4L2_TUNER_ANALOG_TV;
@ -624,6 +610,12 @@ register_client:
}
set_type(client, t->type, t->mode_mask, t->config, t->fe.callback);
list_add_tail(&t->list, &tuner_list);
tuner_info("Tuner %d found with type(s)%s%s%s.\n",
t->type,
t->mode_mask & T_RADIO ? " radio" : "",
t->mode_mask & T_ANALOG_TV ? " TV" : "",
t->mode_mask & T_ANALOG_TV ? " DTV" : "");
return 0;
}
@ -679,6 +671,7 @@ static void set_tv_freq(struct i2c_client *c, unsigned int freq)
tuner_dbg("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, &params);
}
@ -837,13 +830,14 @@ static void set_radio_freq(struct i2c_client *c, unsigned int freq)
tuner_dbg("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, &params);
}
/**
* check_mode - Verify if tuner supports the requested mode
* @t - a pointer to the module's internal struct_tuner
* @t: a pointer to the module's internal struct_tuner
*
* This function checks if the tuner is capable of tuning analog TV,
* digital TV or radio, depending on what the caller wants. If the
@ -852,51 +846,51 @@ static void set_radio_freq(struct i2c_client *c, unsigned int freq)
* This function is needed for boards that have a separate tuner for
* radio (like devices with tea5767).
*/
static inline int check_mode(struct tuner *t)
static inline int check_mode(struct tuner *t, enum v4l2_tuner_type mode)
{
if ((1 << t->mode & t->mode_mask) == 0) {
if ((1 << mode & t->mode_mask) == 0) {
return -EINVAL;
}
return 0;
}
/**
* set_mode - Switch tuner to other mode.
* @client - struct i2c_client pointer
* @t - a pointer to the module's internal struct_tuner
* @mode - enum v4l2_type + T_STANDBY mode
* @cmd - string for the command to be executed (for debug messages)
* set_mode_freq - Switch tuner to other mode.
* @client: struct i2c_client pointer
* @t: a pointer to the module's internal struct_tuner
* @mode: enum v4l2_type (radio or TV)
* @freq: frequency to set (0 means to use the previous one)
*
* If tuner doesn't support the needed mode (radio or TV), prints a
* debug message and returns -EINVAL, changing internal state to T_STANDBY.
* Otherwise, changes the state and sets frequency to the last value, if
* the tuner can sleep or if it supports both Radio and TV.
*/
static inline int set_mode(struct i2c_client *client, struct tuner *t,
int mode, char *cmd)
static int set_mode_freq(struct i2c_client *client, struct tuner *t,
enum v4l2_tuner_type mode, unsigned int freq)
{
struct analog_demod_ops *analog_ops = &t->fe.ops.analog_ops;
if (mode == t->mode)
return 0;
t->mode = mode;
if (check_mode(t) == -EINVAL) {
tuner_dbg("Tuner doesn't support this mode. "
"Putting tuner to sleep\n");
t->mode = T_STANDBY;
if (analog_ops->standby)
analog_ops->standby(&t->fe);
return -EINVAL;
if (mode != t->mode) {
if (check_mode(t, mode) == -EINVAL) {
tuner_dbg("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;
tuner_dbg("Changing to mode %d\n", mode);
}
if (t->mode == V4L2_TUNER_RADIO) {
if (t->radio_freq)
set_radio_freq(client, t->radio_freq);
if (freq)
t->radio_freq = freq;
set_radio_freq(client, t->radio_freq);
} else {
if (t->tv_freq)
set_tv_freq(client, t->tv_freq);
if (freq)
t->tv_freq = freq;
set_tv_freq(client, t->tv_freq);
}
return 0;
@ -923,6 +917,13 @@ static void set_freq(struct i2c_client *c, unsigned long freq)
}
}
/**
* 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;
@ -932,10 +933,16 @@ static void tuner_status(struct dvb_frontend *fe)
const char *p;
switch (t->mode) {
case V4L2_TUNER_RADIO: p = "radio"; break;
case V4L2_TUNER_ANALOG_TV: p = "analog TV"; break;
case V4L2_TUNER_DIGITAL_TV: p = "digital TV"; break;
default: p = "undefined"; break;
case V4L2_TUNER_RADIO:
p = "radio";
break;
case V4L2_TUNER_DIGITAL_TV:
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;
@ -944,7 +951,8 @@ static void tuner_status(struct dvb_frontend *fe)
freq = t->tv_freq / 16;
freq_fraction = (t->tv_freq % 16) * 100 / 16;
}
tuner_info("Tuner mode: %s\n", p);
tuner_info("Tuner mode: %s%s\n", p,
t->standby ? " on standby mode" : "");
tuner_info("Frequency: %lu.%02lu MHz\n", freq, freq_fraction);
tuner_info("Standard: 0x%08lx\n", (unsigned long)t->std);
if (t->mode != V4L2_TUNER_RADIO)
@ -963,19 +971,22 @@ static void tuner_status(struct dvb_frontend *fe)
analog_ops->has_signal(fe));
}
/**
* tuner_s_power - controls the power state of the tuner
* @sd: pointer to struct v4l2_subdev
* @on: a zero value puts the tuner to sleep
*/
static int tuner_s_power(struct v4l2_subdev *sd, int on)
{
struct tuner *t = to_tuner(sd);
struct analog_demod_ops *analog_ops = &t->fe.ops.analog_ops;
/* FIXME: Why this function don't wake the tuner if on != 0 ? */
if (on)
return 0;
tuner_dbg("Putting tuner to sleep\n");
if (check_mode(t) == -EINVAL)
return 0;
t->mode = T_STANDBY;
t->standby = true;
if (analog_ops->standby)
analog_ops->standby(&t->fe);
return 0;
@ -983,13 +994,12 @@ static int tuner_s_power(struct v4l2_subdev *sd, int on)
/* ---------------------------------------------------------------------- */
static int tuner_s_radio(struct v4l2_subdev *sd)
{
struct tuner *t = to_tuner(sd);
struct i2c_client *client = v4l2_get_subdevdata(sd);
if (set_mode(client, t, V4L2_TUNER_RADIO, "s_radio") == -EINVAL)
if (set_mode_freq(client, t, V4L2_TUNER_RADIO, 0) == -EINVAL)
return 0;
return 0;
}
@ -1002,13 +1012,12 @@ static int tuner_s_std(struct v4l2_subdev *sd, v4l2_std_id std)
struct tuner *t = to_tuner(sd);
struct i2c_client *client = v4l2_get_subdevdata(sd);
if (set_mode(client, t, V4L2_TUNER_ANALOG_TV, "s_std") == -EINVAL)
if (set_mode_freq(client, t, V4L2_TUNER_ANALOG_TV, 0) == -EINVAL)
return 0;
t->std = std;
tuner_fixup_std(t);
if (t->tv_freq)
set_freq(client, t->tv_freq);
return 0;
}
@ -1017,9 +1026,8 @@ static int tuner_s_frequency(struct v4l2_subdev *sd, struct v4l2_frequency *f)
struct tuner *t = to_tuner(sd);
struct i2c_client *client = v4l2_get_subdevdata(sd);
if (set_mode(client, t, f->type, "s_frequency") == -EINVAL)
if (set_mode_freq(client, t, f->type, f->frequency) == -EINVAL)
return 0;
set_freq(client, f->frequency);
return 0;
}
@ -1029,20 +1037,20 @@ 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) == -EINVAL)
if (check_mode(t, f->type) == -EINVAL)
return 0;
f->type = t->mode;
if (fe_tuner_ops->get_frequency) {
if (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);
return 0;
} else {
f->frequency = (V4L2_TUNER_RADIO == t->mode) ?
t->radio_freq : t->tv_freq;
}
f->frequency = (V4L2_TUNER_RADIO == t->mode) ?
t->radio_freq : t->tv_freq;
return 0;
}
@ -1052,9 +1060,8 @@ static int tuner_g_tuner(struct v4l2_subdev *sd, struct v4l2_tuner *vt)
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) == -EINVAL)
if (check_mode(t, vt->type) == -EINVAL)
return 0;
vt->type = t->mode;
if (analog_ops->get_afc)
vt->afc = analog_ops->get_afc(&t->fe);
@ -1067,8 +1074,7 @@ static int tuner_g_tuner(struct v4l2_subdev *sd, struct v4l2_tuner *vt)
}
/* radio mode */
vt->rxsubchans =
V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO;
vt->rxsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO;
if (fe_tuner_ops->get_status) {
u32 tuner_status;
@ -1080,11 +1086,11 @@ static int tuner_g_tuner(struct v4l2_subdev *sd, struct v4l2_tuner *vt)
}
if (analog_ops->has_signal)
vt->signal = analog_ops->has_signal(&t->fe);
vt->capability |=
V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO;
vt->capability |= V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO;
vt->audmode = t->audmode;
vt->rangelow = radio_range[0] * 16000;
vt->rangehigh = radio_range[1] * 16000;
return 0;
}
@ -1093,14 +1099,12 @@ static int tuner_s_tuner(struct v4l2_subdev *sd, struct v4l2_tuner *vt)
struct tuner *t = to_tuner(sd);
struct i2c_client *client = v4l2_get_subdevdata(sd);
if (check_mode(t) == -EINVAL)
if (set_mode_freq(client, t, vt->type, 0) == -EINVAL)
return 0;
/* do nothing unless we're a radio tuner */
if (t->mode != V4L2_TUNER_RADIO)
return 0;
t->audmode = vt->audmode;
set_radio_freq(client, t->radio_freq);
if (t->mode == V4L2_TUNER_RADIO)
t->audmode = vt->audmode;
return 0;
}
@ -1128,13 +1132,10 @@ static int tuner_resume(struct i2c_client *c)
struct tuner *t = to_tuner(i2c_get_clientdata(c));
tuner_dbg("resume\n");
if (V4L2_TUNER_RADIO == t->mode) {
if (t->radio_freq)
set_freq(c, t->radio_freq);
} else {
if (t->tv_freq)
set_freq(c, t->tv_freq);
}
if (V4L2_TUNER_RADIO == t->mode)
set_freq(c, t->radio_freq);
else
set_freq(c, t->tv_freq);
return 0;
}

1
include/media/tuner.h
View File

@ -160,7 +160,6 @@
#ifdef __KERNEL__
enum tuner_mode {
T_UNINITIALIZED = 0,
T_RADIO = 1 << V4L2_TUNER_RADIO,
T_ANALOG_TV = 1 << V4L2_TUNER_ANALOG_TV,
T_DIGITAL_TV = 1 << V4L2_TUNER_DIGITAL_TV,