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