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path: root/drivers/media/dvb/frontends/mt312.c
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Diffstat (limited to 'drivers/media/dvb/frontends/mt312.c')
-rw-r--r--drivers/media/dvb/frontends/mt312.c134
1 files changed, 83 insertions, 51 deletions
diff --git a/drivers/media/dvb/frontends/mt312.c b/drivers/media/dvb/frontends/mt312.c
index 2d68fafc0ef..1638301fbd6 100644
--- a/drivers/media/dvb/frontends/mt312.c
+++ b/drivers/media/dvb/frontends/mt312.c
@@ -152,7 +152,8 @@ static int mt312_get_inversion(struct mt312_state *state,
int ret;
u8 vit_mode;
- if ((ret = mt312_readreg(state, VIT_MODE, &vit_mode)) < 0)
+ ret = mt312_readreg(state, VIT_MODE, &vit_mode);
+ if (ret < 0)
return ret;
if (vit_mode & 0x80) /* auto inversion was used */
@@ -170,15 +171,18 @@ static int mt312_get_symbol_rate(struct mt312_state *state, u32 *sr)
u16 monitor;
u8 buf[2];
- if ((ret = mt312_readreg(state, SYM_RATE_H, &sym_rate_h)) < 0)
+ ret = mt312_readreg(state, SYM_RATE_H, &sym_rate_h);
+ if (ret < 0)
return ret;
if (sym_rate_h & 0x80) {
/* symbol rate search was used */
- if ((ret = mt312_writereg(state, MON_CTRL, 0x03)) < 0)
+ ret = mt312_writereg(state, MON_CTRL, 0x03);
+ if (ret < 0)
return ret;
- if ((ret = mt312_read(state, MONITOR_H, buf, sizeof(buf))) < 0)
+ ret = mt312_read(state, MONITOR_H, buf, sizeof(buf));
+ if (ret < 0)
return ret;
monitor = (buf[0] << 8) | buf[1];
@@ -186,16 +190,18 @@ static int mt312_get_symbol_rate(struct mt312_state *state, u32 *sr)
dprintk("sr(auto) = %u\n",
mt312_div(monitor * 15625, 4));
} else {
- if ((ret = mt312_writereg(state, MON_CTRL, 0x05)) < 0)
+ ret = mt312_writereg(state, MON_CTRL, 0x05);
+ if (ret < 0)
return ret;
- if ((ret = mt312_read(state, MONITOR_H, buf, sizeof(buf))) < 0)
+ ret = mt312_read(state, MONITOR_H, buf, sizeof(buf));
+ if (ret < 0)
return ret;
dec_ratio = ((buf[0] >> 5) & 0x07) * 32;
- if ((ret = mt312_read(state, SYM_RAT_OP_H, buf,
- sizeof(buf))) < 0)
+ ret = mt312_read(state, SYM_RAT_OP_H, buf, sizeof(buf));
+ if (ret < 0)
return ret;
sym_rat_op = (buf[0] << 8) | buf[1];
@@ -219,7 +225,8 @@ static int mt312_get_code_rate(struct mt312_state *state, fe_code_rate_t *cr)
int ret;
u8 fec_status;
- if ((ret = mt312_readreg(state, FEC_STATUS, &fec_status)) < 0)
+ ret = mt312_readreg(state, FEC_STATUS, &fec_status);
+ if (ret < 0)
return ret;
*cr = fec_tab[(fec_status >> 4) & 0x07];
@@ -234,15 +241,17 @@ static int mt312_initfe(struct dvb_frontend *fe)
u8 buf[2];
/* wake up */
- if ((ret = mt312_writereg(state, CONFIG,
- (state->frequency == 60 ? 0x88 : 0x8c))) < 0)
+ ret = mt312_writereg(state, CONFIG,
+ (state->frequency == 60 ? 0x88 : 0x8c));
+ if (ret < 0)
return ret;
/* wait at least 150 usec */
udelay(150);
/* full reset */
- if ((ret = mt312_reset(state, 1)) < 0)
+ ret = mt312_reset(state, 1);
+ if (ret < 0)
return ret;
/* Per datasheet, write correct values. 09/28/03 ACCJr.
@@ -251,8 +260,8 @@ static int mt312_initfe(struct dvb_frontend *fe)
u8 buf_def[8] = { 0x14, 0x12, 0x03, 0x02,
0x01, 0x00, 0x00, 0x00 };
- if ((ret = mt312_write(state, VIT_SETUP, buf_def,
- sizeof(buf_def))) < 0)
+ ret = mt312_write(state, VIT_SETUP, buf_def, sizeof(buf_def));
+ if (ret < 0)
return ret;
}
@@ -263,23 +272,28 @@ static int mt312_initfe(struct dvb_frontend *fe)
/* DISEQC_RATIO */
buf[1] = mt312_div(MT312_PLL_CLK, 15000 * 4);
- if ((ret = mt312_write(state, SYS_CLK, buf, sizeof(buf))) < 0)
+ ret = mt312_write(state, SYS_CLK, buf, sizeof(buf));
+ if (ret < 0)
return ret;
- if ((ret = mt312_writereg(state, SNR_THS_HIGH, 0x32)) < 0)
+ ret = mt312_writereg(state, SNR_THS_HIGH, 0x32);
+ if (ret < 0)
return ret;
- if ((ret = mt312_writereg(state, OP_CTRL, 0x53)) < 0)
+ ret = mt312_writereg(state, OP_CTRL, 0x53);
+ if (ret < 0)
return ret;
/* TS_SW_LIM */
buf[0] = 0x8c;
buf[1] = 0x98;
- if ((ret = mt312_write(state, TS_SW_LIM_L, buf, sizeof(buf))) < 0)
+ ret = mt312_write(state, TS_SW_LIM_L, buf, sizeof(buf));
+ if (ret < 0)
return ret;
- if ((ret = mt312_writereg(state, CS_SW_LIM, 0x69)) < 0)
+ ret = mt312_writereg(state, CS_SW_LIM, 0x69);
+ if (ret < 0)
return ret;
return 0;
@@ -295,24 +309,26 @@ static int mt312_send_master_cmd(struct dvb_frontend *fe,
if ((c->msg_len == 0) || (c->msg_len > sizeof(c->msg)))
return -EINVAL;
- if ((ret = mt312_readreg(state, DISEQC_MODE, &diseqc_mode)) < 0)
+ ret = mt312_readreg(state, DISEQC_MODE, &diseqc_mode);
+ if (ret < 0)
return ret;
- if ((ret =
- mt312_write(state, (0x80 | DISEQC_INSTR), c->msg, c->msg_len)) < 0)
+ ret = mt312_write(state, (0x80 | DISEQC_INSTR), c->msg, c->msg_len);
+ if (ret < 0)
return ret;
- if ((ret =
- mt312_writereg(state, DISEQC_MODE,
- (diseqc_mode & 0x40) | ((c->msg_len - 1) << 3)
- | 0x04)) < 0)
+ ret = mt312_writereg(state, DISEQC_MODE,
+ (diseqc_mode & 0x40) | ((c->msg_len - 1) << 3)
+ | 0x04);
+ if (ret < 0)
return ret;
/* set DISEQC_MODE[2:0] to zero if a return message is expected */
- if (c->msg[0] & 0x02)
- if ((ret = mt312_writereg(state, DISEQC_MODE,
- (diseqc_mode & 0x40))) < 0)
+ if (c->msg[0] & 0x02) {
+ ret = mt312_writereg(state, DISEQC_MODE, (diseqc_mode & 0x40));
+ if (ret < 0)
return ret;
+ }
return 0;
}
@@ -328,12 +344,13 @@ static int mt312_send_burst(struct dvb_frontend *fe, const fe_sec_mini_cmd_t c)
if (c > SEC_MINI_B)
return -EINVAL;
- if ((ret = mt312_readreg(state, DISEQC_MODE, &diseqc_mode)) < 0)
+ ret = mt312_readreg(state, DISEQC_MODE, &diseqc_mode);
+ if (ret < 0)
return ret;
- if ((ret =
- mt312_writereg(state, DISEQC_MODE,
- (diseqc_mode & 0x40) | mini_tab[c])) < 0)
+ ret = mt312_writereg(state, DISEQC_MODE,
+ (diseqc_mode & 0x40) | mini_tab[c]);
+ if (ret < 0)
return ret;
return 0;
@@ -350,12 +367,13 @@ static int mt312_set_tone(struct dvb_frontend *fe, const fe_sec_tone_mode_t t)
if (t > SEC_TONE_OFF)
return -EINVAL;
- if ((ret = mt312_readreg(state, DISEQC_MODE, &diseqc_mode)) < 0)
+ ret = mt312_readreg(state, DISEQC_MODE, &diseqc_mode);
+ if (ret < 0)
return ret;
- if ((ret =
- mt312_writereg(state, DISEQC_MODE,
- (diseqc_mode & 0x40) | tone_tab[t])) < 0)
+ ret = mt312_writereg(state, DISEQC_MODE,
+ (diseqc_mode & 0x40) | tone_tab[t]);
+ if (ret < 0)
return ret;
return 0;
@@ -380,7 +398,8 @@ static int mt312_read_status(struct dvb_frontend *fe, fe_status_t *s)
*s = 0;
- if ((ret = mt312_read(state, QPSK_STAT_H, status, sizeof(status))) < 0)
+ ret = mt312_read(state, QPSK_STAT_H, status, sizeof(status));
+ if (ret < 0)
return ret;
dprintk("QPSK_STAT_H: 0x%02x, QPSK_STAT_L: 0x%02x,"
@@ -406,7 +425,8 @@ static int mt312_read_ber(struct dvb_frontend *fe, u32 *ber)
int ret;
u8 buf[3];
- if ((ret = mt312_read(state, RS_BERCNT_H, buf, 3)) < 0)
+ ret = mt312_read(state, RS_BERCNT_H, buf, 3);
+ if (ret < 0)
return ret;
*ber = ((buf[0] << 16) | (buf[1] << 8) | buf[2]) * 64;
@@ -423,7 +443,8 @@ static int mt312_read_signal_strength(struct dvb_frontend *fe,
u16 agc;
s16 err_db;
- if ((ret = mt312_read(state, AGC_H, buf, sizeof(buf))) < 0)
+ ret = mt312_read(state, AGC_H, buf, sizeof(buf));
+ if (ret < 0)
return ret;
agc = (buf[0] << 6) | (buf[1] >> 2);
@@ -442,7 +463,8 @@ static int mt312_read_snr(struct dvb_frontend *fe, u16 *snr)
int ret;
u8 buf[2];
- if ((ret = mt312_read(state, M_SNR_H, &buf, sizeof(buf))) < 0)
+ ret = mt312_read(state, M_SNR_H, &buf, sizeof(buf));
+ if (ret < 0)
return ret;
*snr = 0xFFFF - ((((buf[0] & 0x7f) << 8) | buf[1]) << 1);
@@ -456,7 +478,8 @@ static int mt312_read_ucblocks(struct dvb_frontend *fe, u32 *ubc)
int ret;
u8 buf[2];
- if ((ret = mt312_read(state, RS_UBC_H, &buf, sizeof(buf))) < 0)
+ ret = mt312_read(state, RS_UBC_H, &buf, sizeof(buf));
+ if (ret < 0)
return ret;
*ubc = (buf[0] << 8) | buf[1];
@@ -512,14 +535,16 @@ static int mt312_set_frontend(struct dvb_frontend *fe,
if ((config_val & 0x0c) == 0x08) {
/* We are running 60MHz */
state->frequency = 90;
- if ((ret = mt312_initfe(fe)) < 0)
+ ret = mt312_initfe(fe);
+ if (ret < 0)
return ret;
}
} else {
if ((config_val & 0x0c) == 0x0C) {
/* We are running 90MHz */
state->frequency = 60;
- if ((ret = mt312_initfe(fe)) < 0)
+ ret = mt312_initfe(fe);
+ if (ret < 0)
return ret;
}
}
@@ -557,7 +582,8 @@ static int mt312_set_frontend(struct dvb_frontend *fe,
/* GO */
buf[4] = 0x01;
- if ((ret = mt312_write(state, SYM_RATE_H, buf, sizeof(buf))) < 0)
+ ret = mt312_write(state, SYM_RATE_H, buf, sizeof(buf));
+ if (ret < 0)
return ret;
mt312_reset(state, 0);
@@ -571,13 +597,16 @@ static int mt312_get_frontend(struct dvb_frontend *fe,
struct mt312_state *state = fe->demodulator_priv;
int ret;
- if ((ret = mt312_get_inversion(state, &p->inversion)) < 0)
+ ret = mt312_get_inversion(state, &p->inversion);
+ if (ret < 0)
return ret;
- if ((ret = mt312_get_symbol_rate(state, &p->u.qpsk.symbol_rate)) < 0)
+ ret = mt312_get_symbol_rate(state, &p->u.qpsk.symbol_rate);
+ if (ret < 0)
return ret;
- if ((ret = mt312_get_code_rate(state, &p->u.qpsk.fec_inner)) < 0)
+ ret = mt312_get_code_rate(state, &p->u.qpsk.fec_inner);
+ if (ret < 0)
return ret;
return 0;
@@ -601,14 +630,17 @@ static int mt312_sleep(struct dvb_frontend *fe)
u8 config;
/* reset all registers to defaults */
- if ((ret = mt312_reset(state, 1)) < 0)
+ ret = mt312_reset(state, 1);
+ if (ret < 0)
return ret;
- if ((ret = mt312_readreg(state, CONFIG, &config)) < 0)
+ ret = mt312_readreg(state, CONFIG, &config);
+ if (ret < 0)
return ret;
/* enter standby */
- if ((ret = mt312_writereg(state, CONFIG, config & 0x7f)) < 0)
+ ret = mt312_writereg(state, CONFIG, config & 0x7f);
+ if (ret < 0)
return ret;
return 0;
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-27 22:58:07 +0000