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V4L/DVB: cx22702: Simplify cx22702_set_tps()

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Code in function cx22702_set_tps() can be slightly simplified.
Apparently gcc was smart enough to optimize it anyway, but it can't
hurt to make the code more readable.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: Steven Toth <stoth@kernellabs.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Jean Delvare 2010-09-10 10:36:37 -03:00 committed by Mauro Carvalho Chehab
parent bdc6fad341
commit f89ca6fae2
1 changed files with 26 additions and 32 deletions
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58
drivers/media/dvb/frontends/cx22702.c
View file

@ -316,33 +316,31 @@ static int cx22702_set_tps(struct dvb_frontend *fe,
} }
/* manually programmed values */ /* manually programmed values */
val = 0; switch (p->u.ofdm.constellation) { /* mask 0x18 */
switch (p->u.ofdm.constellation) {
case QPSK: case QPSK:
val = (val & 0xe7); val = 0x00;
break; break;
case QAM_16: case QAM_16:
val = (val & 0xe7) | 0x08; val = 0x08;
break; break;
case QAM_64: case QAM_64:
val = (val & 0xe7) | 0x10; val = 0x10;
break; break;
default: default:
dprintk("%s: invalid constellation\n", __func__); dprintk("%s: invalid constellation\n", __func__);
return -EINVAL; return -EINVAL;
} }
switch (p->u.ofdm.hierarchy_information) { switch (p->u.ofdm.hierarchy_information) { /* mask 0x07 */
case HIERARCHY_NONE: case HIERARCHY_NONE:
val = (val & 0xf8);
break; break;
case HIERARCHY_1: case HIERARCHY_1:
val = (val & 0xf8) | 1; val |= 0x01;
break; break;
case HIERARCHY_2: case HIERARCHY_2:
val = (val & 0xf8) | 2; val |= 0x02;
break; break;
case HIERARCHY_4: case HIERARCHY_4:
val = (val & 0xf8) | 3; val |= 0x03;
break; break;
default: default:
dprintk("%s: invalid hierarchy\n", __func__); dprintk("%s: invalid hierarchy\n", __func__);
@ -350,44 +348,42 @@ static int cx22702_set_tps(struct dvb_frontend *fe,
} }
cx22702_writereg(state, 0x06, val); cx22702_writereg(state, 0x06, val);
val = 0; switch (p->u.ofdm.code_rate_HP) { /* mask 0x38 */
switch (p->u.ofdm.code_rate_HP) {
case FEC_NONE: case FEC_NONE:
case FEC_1_2: case FEC_1_2:
val = (val & 0xc7); val = 0x00;
break; break;
case FEC_2_3: case FEC_2_3:
val = (val & 0xc7) | 0x08; val = 0x08;
break; break;
case FEC_3_4: case FEC_3_4:
val = (val & 0xc7) | 0x10; val = 0x10;
break; break;
case FEC_5_6: case FEC_5_6:
val = (val & 0xc7) | 0x18; val = 0x18;
break; break;
case FEC_7_8: case FEC_7_8:
val = (val & 0xc7) | 0x20; val = 0x20;
break; break;
default: default:
dprintk("%s: invalid code_rate_HP\n", __func__); dprintk("%s: invalid code_rate_HP\n", __func__);
return -EINVAL; return -EINVAL;
} }
switch (p->u.ofdm.code_rate_LP) { switch (p->u.ofdm.code_rate_LP) { /* mask 0x07 */
case FEC_NONE: case FEC_NONE:
case FEC_1_2: case FEC_1_2:
val = (val & 0xf8);
break; break;
case FEC_2_3: case FEC_2_3:
val = (val & 0xf8) | 1; val |= 0x01;
break; break;
case FEC_3_4: case FEC_3_4:
val = (val & 0xf8) | 2; val |= 0x02;
break; break;
case FEC_5_6: case FEC_5_6:
val = (val & 0xf8) | 3; val |= 0x03;
break; break;
case FEC_7_8: case FEC_7_8:
val = (val & 0xf8) | 4; val |= 0x04;
break; break;
default: default:
dprintk("%s: invalid code_rate_LP\n", __func__); dprintk("%s: invalid code_rate_LP\n", __func__);
@ -395,30 +391,28 @@ static int cx22702_set_tps(struct dvb_frontend *fe,
} }
cx22702_writereg(state, 0x07, val); cx22702_writereg(state, 0x07, val);
val = 0; switch (p->u.ofdm.guard_interval) { /* mask 0x0c */
switch (p->u.ofdm.guard_interval) {
case GUARD_INTERVAL_1_32: case GUARD_INTERVAL_1_32:
val = (val & 0xf3); val = 0x00;
break; break;
case GUARD_INTERVAL_1_16: case GUARD_INTERVAL_1_16:
val = (val & 0xf3) | 0x04; val = 0x04;
break; break;
case GUARD_INTERVAL_1_8: case GUARD_INTERVAL_1_8:
val = (val & 0xf3) | 0x08; val = 0x08;
break; break;
case GUARD_INTERVAL_1_4: case GUARD_INTERVAL_1_4:
val = (val & 0xf3) | 0x0c; val = 0x0c;
break; break;
default: default:
dprintk("%s: invalid guard_interval\n", __func__); dprintk("%s: invalid guard_interval\n", __func__);
return -EINVAL; return -EINVAL;
} }
switch (p->u.ofdm.transmission_mode) { switch (p->u.ofdm.transmission_mode) { /* mask 0x03 */
case TRANSMISSION_MODE_2K: case TRANSMISSION_MODE_2K:
val = (val & 0xfc);
break; break;
case TRANSMISSION_MODE_8K: case TRANSMISSION_MODE_8K:
val = (val & 0xfc) | 1; val |= 0x1;
break; break;
default: default:
dprintk("%s: invalid transmission_mode\n", __func__); dprintk("%s: invalid transmission_mode\n", __func__);