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V4L/DVB (9000): S2API: Cleanup code that prepares tuning structures. 

Signed-off-by: Steven Toth <stoth@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Steven Toth 2008-09-12 00:27:13 -03:00 committed by Mauro Carvalho Chehab
parent ee33c525c4
commit d5748f1079
1 changed files with 97 additions and 134 deletions
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231
drivers/media/dvb/dvb-core/dvb_frontend.c
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@ -1001,6 +1001,8 @@ void dtv_property_cache_sync(struct dvb_frontend *fe, struct dvb_frontend_parame
{ {
struct dtv_frontend_properties *c = &fe->dtv_property_cache; struct dtv_frontend_properties *c = &fe->dtv_property_cache;
printk("%s()\n", __FUNCTION__);
c->frequency = p->frequency; c->frequency = p->frequency;
c->inversion = p->inversion; c->inversion = p->inversion;
@ -1029,153 +1031,114 @@ void dtv_property_cache_sync(struct dvb_frontend *fe, struct dvb_frontend_parame
} }
} }
int dtv_property_cache_submit(struct dvb_frontend *fe) /* Ensure the cached values are set correctly in the frontend
* legacy tuning structures, for the advanced tuning API.
*/
void dtv_property_legacy_params_sync(struct dvb_frontend *fe)
{ {
/* We have to do one of two things:
* To support legacy devices using the new API we take values from
* the tv_cache and generate a legacy truning structure.
*
* Or,
*
* To support advanced tuning devices with the new API we
* notify the new advance driver type that a tuning operation is required
* and let it pull values from the cache as is, we don't need to
* pass structures.
*
* We'll use the modulation type to assess how this is handled. as the API
* progresses we'll probably want to have a flag in dvb_frontend_ops
* to allow the frontend driver to dictate how it likes to be tuned.
*
* Because of how this is attached to the ioctl handler for legacy support,
* it's important to return an appropriate result code with atleast the following
* three meanings:
* < 0 = processing error
* 0 = lecagy ioctl handler to submit a traditional set_frontend() call.
* 1 = lecagy ioctl handler should NOT submit a traditional set_frontend() call.
*/
int r;
struct dtv_frontend_properties *c = &fe->dtv_property_cache; struct dtv_frontend_properties *c = &fe->dtv_property_cache;
struct dvb_frontend_private *fepriv = fe->frontend_priv; struct dvb_frontend_private *fepriv = fe->frontend_priv;
struct dvb_frontend_parameters p; struct dvb_frontend_parameters *p = &fepriv->parameters;
printk("%s()\n", __FUNCTION__); printk("%s()\n", __FUNCTION__);
/* For legacy delivery systems we don't need the delivery_system to be specified */ p->frequency = c->frequency;
p->inversion = c->inversion;
switch (fe->ops.info.type) {
case FE_QPSK:
printk("%s() Preparing QPSK req\n", __FUNCTION__);
p->u.qpsk.symbol_rate = c->symbol_rate;
p->u.qpsk.fec_inner = c->fec_inner;
break;
case FE_QAM:
printk("%s() Preparing QAM req\n", __FUNCTION__);
p->u.qam.symbol_rate = c->symbol_rate;
p->u.qam.fec_inner = c->fec_inner;
p->u.qam.modulation = c->modulation;
break;
case FE_OFDM:
printk("%s() Preparing OFDM req\n", __FUNCTION__);
p->u.ofdm.bandwidth = c->bandwidth;
p->u.ofdm.code_rate_HP = c->code_rate_HP;
p->u.ofdm.code_rate_LP = c->code_rate_LP;
p->u.ofdm.constellation = c->modulation;
p->u.ofdm.transmission_mode = c->transmission_mode;
p->u.ofdm.guard_interval = c->guard_interval;
p->u.ofdm.hierarchy_information = c->hierarchy;
break;
case FE_ATSC:
printk("%s() Preparing VSB req\n", __FUNCTION__);
p->u.vsb.modulation = c->modulation;
break;
}
}
/* Ensure the cached values are set correctly in the frontend
* legacy tuning structures, for the legacy tuning API.
*/
void dtv_property_adv_params_sync(struct dvb_frontend *fe)
{
struct dtv_frontend_properties *c = &fe->dtv_property_cache;
struct dvb_frontend_private *fepriv = fe->frontend_priv;
struct dvb_frontend_parameters *p = &fepriv->parameters;
printk("%s()\n", __FUNCTION__);
p->frequency = c->frequency;
p->inversion = c->inversion;
switch(c->modulation) {
case _8PSK:
case _16APSK:
case NBC_QPSK:
p->u.qpsk.symbol_rate = c->symbol_rate;
p->u.qpsk.fec_inner = c->fec_inner;
break;
default:
break;
}
if(c->delivery_system == SYS_ISDBT) {
/* Fake out a generic DVB-T request so we pass validation in the ioctl */
p->frequency = c->frequency;
p->inversion = INVERSION_AUTO;
p->u.ofdm.constellation = QAM_AUTO;
p->u.ofdm.code_rate_HP = FEC_AUTO;
p->u.ofdm.code_rate_LP = FEC_AUTO;
p->u.ofdm.bandwidth = BANDWIDTH_AUTO;
p->u.ofdm.transmission_mode = TRANSMISSION_MODE_AUTO;
p->u.ofdm.guard_interval = GUARD_INTERVAL_AUTO;
p->u.ofdm.hierarchy_information = HIERARCHY_AUTO;
}
}
void dtv_property_cache_submit(struct dvb_frontend *fe)
{
struct dtv_frontend_properties *c = &fe->dtv_property_cache;
printk("%s()\n", __FUNCTION__);
/* For legacy delivery systems we don't need the delivery_system to
* be specified, but we populate the older structures from the cache
* so we can call set_frontend on older drivers.
*/
if(is_legacy_delivery_system(c->delivery_system)) { if(is_legacy_delivery_system(c->delivery_system)) {
printk("%s() legacy, modulation = %d\n", __FUNCTION__, c->modulation); printk("%s() legacy, modulation = %d\n", __FUNCTION__, c->modulation);
switch(c->modulation) { dtv_property_legacy_params_sync(fe);
case QPSK:
printk("%s() Preparing QPSK req\n", __FUNCTION__);
p.frequency = c->frequency;
p.inversion = c->inversion;
p.u.qpsk.symbol_rate = c->symbol_rate;
p.u.qpsk.fec_inner = c->fec_inner;
memcpy(&fepriv->parameters, &p,
sizeof (struct dvb_frontend_parameters));
/* Call the traditional tuning mechanisms. */
r = 0;
break;
case QAM_16:
case QAM_32:
case QAM_64:
case QAM_128:
case QAM_256:
case QAM_AUTO:
printk("%s() Preparing QAM req\n", __FUNCTION__);
p.frequency = c->frequency;
p.inversion = c->inversion;
p.u.qam.symbol_rate = c->symbol_rate;
p.u.vsb.modulation = c->modulation;
printk("%s() frequency = %d\n", __FUNCTION__, p.frequency);
printk("%s() QAM = %d\n", __FUNCTION__, p.u.vsb.modulation);
memcpy(&fepriv->parameters, &p,
sizeof (struct dvb_frontend_parameters));
/* At this point we're fully formed for backwards
* compatability and we need to return this
* via the ioctl handler as SET_FRONTEND (arg).
* We've already patched the new values into the
* frontends tuning structures so the ioctl code just
* continues as if a legacy tune structure was passed
* from userspace.
*/
r = 0;
break;
case VSB_8:
case VSB_16:
printk("%s() Preparing VSB req\n", __FUNCTION__);
p.frequency = c->frequency;
p.u.vsb.modulation = c->modulation;
memcpy(&fepriv->parameters, &p,
sizeof (struct dvb_frontend_parameters));
/* Call the traditional tuning mechanisms. */
r = 0;
break;
/* TODO: Add any missing modulation types */
default:
r = -1;
}
} else { } else {
printk("%s() adv, modulation = %d\n", __FUNCTION__, c->modulation);
/* For advanced delivery systems / modulation types ... /* For advanced delivery systems / modulation types ...
* we seed the lecacy dvb_frontend_parameters structure * we seed the lecacy dvb_frontend_parameters structure
* so that the sanity checking code later in the IOCTL processing * so that the sanity checking code later in the IOCTL processing
* can validate our basic frequency ranges, symbolrates, modulation * can validate our basic frequency ranges, symbolrates, modulation
* etc. * etc.
*/ */
r = -1; dtv_property_adv_params_sync(fe);
switch(c->modulation) {
case _8PSK:
case _16APSK:
case NBC_QPSK:
/* Just post a notification to the demod driver and let it pull
* the specific values it wants from its dtv_property_cache.
* It can decide how best to use those parameters.
* IOCTL will call set_frontend (by default) due to zigzag
* support etc.
*/
if (fe->ops.set_params)
r = fe->ops.set_params(fe);
p.frequency = c->frequency;
p.inversion = c->inversion;
p.u.qpsk.symbol_rate = c->symbol_rate;
p.u.qpsk.fec_inner = c->fec_inner;
memcpy(&fepriv->parameters, &p,
sizeof (struct dvb_frontend_parameters));
r = 0;
break;
default:
r = -1;
}
if(c->delivery_system == SYS_ISDBT) {
/* Fake out a generic DVB-T request so we pass validation in the ioctl */
p.frequency = c->frequency;
p.inversion = INVERSION_AUTO;
p.u.ofdm.constellation = QAM_AUTO;
p.u.ofdm.code_rate_HP = FEC_AUTO;
p.u.ofdm.code_rate_LP = FEC_AUTO;
p.u.ofdm.bandwidth = BANDWIDTH_AUTO;
p.u.ofdm.transmission_mode = TRANSMISSION_MODE_AUTO;
p.u.ofdm.guard_interval = GUARD_INTERVAL_AUTO;
p.u.ofdm.hierarchy_information = HIERARCHY_AUTO;
memcpy(&fepriv->parameters, &p,
sizeof (struct dvb_frontend_parameters));
r = 0;
}
} }
return r;
} }
static int dvb_frontend_ioctl_legacy(struct inode *inode, struct file *file, static int dvb_frontend_ioctl_legacy(struct inode *inode, struct file *file,
@ -1203,13 +1166,13 @@ int dtv_property_process(struct dvb_frontend *fe, struct dtv_property *tvp,
break; break;
case DTV_TUNE: case DTV_TUNE:
/* interpret the cache of data, build either a traditional frontend /* interpret the cache of data, build either a traditional frontend
* tunerequest and submit it to a subset of the ioctl handler, * tunerequest so we can pass validation in the FE_SET_FRONTEND
* or, call a new undefined method on the frontend to deal with * ioctl.
* all new tune requests.
*/ */
fe->dtv_property_cache.state = tvp->cmd; fe->dtv_property_cache.state = tvp->cmd;
printk("%s() Finalised property cache\n", __FUNCTION__); printk("%s() Finalised property cache\n", __FUNCTION__);
r |= dtv_property_cache_submit(fe); dtv_property_cache_submit(fe);
r |= dvb_frontend_ioctl_legacy(inode, file, FE_SET_FRONTEND, r |= dvb_frontend_ioctl_legacy(inode, file, FE_SET_FRONTEND,
&fepriv->parameters); &fepriv->parameters);
break; break;