diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/media/dvb-frontends/mb86a20s.c | 138 |
1 files changed, 80 insertions, 58 deletions
diff --git a/drivers/media/dvb-frontends/mb86a20s.c b/drivers/media/dvb-frontends/mb86a20s.c index fade566927c..4ff3a0c9d97 100644 --- a/drivers/media/dvb-frontends/mb86a20s.c +++ b/drivers/media/dvb-frontends/mb86a20s.c @@ -1,11 +1,9 @@ /* * Fujitu mb86a20s ISDB-T/ISDB-Tsb Module driver * - * Copyright (C) 2010 Mauro Carvalho Chehab <mchehab@redhat.com> + * Copyright (C) 2010-2013 Mauro Carvalho Chehab <mchehab@redhat.com> * Copyright (C) 2009-2010 Douglas Landgraf <dougsland@redhat.com> * - * FIXME: Need to port to DVB v5.2 API - * * 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 version 2. @@ -360,7 +358,7 @@ static int mb86a20s_set_frontend(struct dvb_frontend *fe) /* * FIXME: Properly implement the set frontend properties */ - struct dtv_frontend_properties *p = &fe->dtv_property_cache; + struct dtv_frontend_properties *c = &fe->dtv_property_cache; #endif dprintk("\n"); @@ -507,93 +505,117 @@ static int mb86a20s_get_segment_count(struct mb86a20s_state *state, return count; } +static void mb86a20s_reset_frontend_cache(struct dvb_frontend *fe) +{ + struct dtv_frontend_properties *c = &fe->dtv_property_cache; + + /* Fixed parameters */ + c->delivery_system = SYS_ISDBT; + c->bandwidth_hz = 6000000; + + /* Initialize values that will be later autodetected */ + c->isdbt_layer_enabled = 0; + c->transmission_mode = TRANSMISSION_MODE_AUTO; + c->guard_interval = GUARD_INTERVAL_AUTO; + c->isdbt_sb_mode = 0; + c->isdbt_sb_segment_count = 0; +} + static int mb86a20s_get_frontend(struct dvb_frontend *fe) { struct mb86a20s_state *state = fe->demodulator_priv; - struct dtv_frontend_properties *p = &fe->dtv_property_cache; + struct dtv_frontend_properties *c = &fe->dtv_property_cache; int i, rc; - /* Fixed parameters */ - p->delivery_system = SYS_ISDBT; - p->bandwidth_hz = 6000000; + /* Reset frontend cache to default values */ + mb86a20s_reset_frontend_cache(fe); if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 0); /* Check for partial reception */ rc = mb86a20s_writereg(state, 0x6d, 0x85); - if (rc >= 0) - rc = mb86a20s_readreg(state, 0x6e); - if (rc >= 0) - p->isdbt_partial_reception = (rc & 0x10) ? 1 : 0; + if (rc < 0) + return rc; + rc = mb86a20s_readreg(state, 0x6e); + if (rc < 0) + return rc; + c->isdbt_partial_reception = (rc & 0x10) ? 1 : 0; /* Get per-layer data */ - p->isdbt_layer_enabled = 0; + for (i = 0; i < 3; i++) { rc = mb86a20s_get_segment_count(state, i); - if (rc >= 0 && rc < 14) - p->layer[i].segment_count = rc; - if (rc == 0x0f) + if (rc < 0) + goto error; + if (rc >= 0 && rc < 14) + c->layer[i].segment_count = rc; + else { + c->layer[i].segment_count = 0; continue; - p->isdbt_layer_enabled |= 1 << i; + } + c->isdbt_layer_enabled |= 1 << i; rc = mb86a20s_get_modulation(state, i); - if (rc >= 0) - p->layer[i].modulation = rc; + if (rc < 0) + goto error; + c->layer[i].modulation = rc; rc = mb86a20s_get_fec(state, i); - if (rc >= 0) - p->layer[i].fec = rc; + if (rc < 0) + goto error; + c->layer[i].fec = rc; rc = mb86a20s_get_interleaving(state, i); - if (rc >= 0) - p->layer[i].interleaving = rc; + if (rc < 0) + goto error; + c->layer[i].interleaving = rc; } - p->isdbt_sb_mode = 0; rc = mb86a20s_writereg(state, 0x6d, 0x84); - if ((rc >= 0) && ((rc & 0x60) == 0x20)) { - p->isdbt_sb_mode = 1; + if (rc < 0) + return rc; + if ((rc & 0x60) == 0x20) { + c->isdbt_sb_mode = 1; /* At least, one segment should exist */ - if (!p->isdbt_sb_segment_count) - p->isdbt_sb_segment_count = 1; - } else - p->isdbt_sb_segment_count = 0; + if (!c->isdbt_sb_segment_count) + c->isdbt_sb_segment_count = 1; + } /* Get transmission mode and guard interval */ - p->transmission_mode = TRANSMISSION_MODE_AUTO; - p->guard_interval = GUARD_INTERVAL_AUTO; rc = mb86a20s_readreg(state, 0x07); - if (rc >= 0) { - if ((rc & 0x60) == 0x20) { - switch (rc & 0x0c >> 2) { - case 0: - p->transmission_mode = TRANSMISSION_MODE_2K; - break; - case 1: - p->transmission_mode = TRANSMISSION_MODE_4K; - break; - case 2: - p->transmission_mode = TRANSMISSION_MODE_8K; - break; - } + if (rc < 0) + return rc; + if ((rc & 0x60) == 0x20) { + switch (rc & 0x0c >> 2) { + case 0: + c->transmission_mode = TRANSMISSION_MODE_2K; + break; + case 1: + c->transmission_mode = TRANSMISSION_MODE_4K; + break; + case 2: + c->transmission_mode = TRANSMISSION_MODE_8K; + break; } - if (!(rc & 0x10)) { - switch (rc & 0x3) { - case 0: - p->guard_interval = GUARD_INTERVAL_1_4; - break; - case 1: - p->guard_interval = GUARD_INTERVAL_1_8; - break; - case 2: - p->guard_interval = GUARD_INTERVAL_1_16; - break; - } + } + if (!(rc & 0x10)) { + switch (rc & 0x3) { + case 0: + c->guard_interval = GUARD_INTERVAL_1_4; + break; + case 1: + c->guard_interval = GUARD_INTERVAL_1_8; + break; + case 2: + c->guard_interval = GUARD_INTERVAL_1_16; + break; } } +error: if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 1); - return 0; + return rc; + } static int mb86a20s_tune(struct dvb_frontend *fe, |