diff options
Diffstat (limited to 'drivers/media/dvb-frontends/m88rs2000.c')
| -rw-r--r-- | drivers/media/dvb-frontends/m88rs2000.c | 42 |
1 files changed, 31 insertions, 11 deletions
diff --git a/drivers/media/dvb-frontends/m88rs2000.c b/drivers/media/dvb-frontends/m88rs2000.c index 8091653e886..02699c11101 100644 --- a/drivers/media/dvb-frontends/m88rs2000.c +++ b/drivers/media/dvb-frontends/m88rs2000.c @@ -160,24 +160,44 @@ static int m88rs2000_set_symbolrate(struct dvb_frontend *fe, u32 srate) { struct m88rs2000_state *state = fe->demodulator_priv; int ret; - u32 temp; + u64 temp; + u32 mclk; u8 b[3]; if ((srate < 1000000) || (srate > 45000000)) return -EINVAL; + mclk = m88rs2000_get_mclk(fe); + if (!mclk) + return -EINVAL; + temp = srate / 1000; - temp *= 11831; - temp /= 68; - temp -= 3; + temp *= 1 << 24; + + do_div(temp, mclk); b[0] = (u8) (temp >> 16) & 0xff; b[1] = (u8) (temp >> 8) & 0xff; b[2] = (u8) temp & 0xff; + ret = m88rs2000_writereg(state, 0x93, b[2]); ret |= m88rs2000_writereg(state, 0x94, b[1]); ret |= m88rs2000_writereg(state, 0x95, b[0]); + if (srate > 10000000) + ret |= m88rs2000_writereg(state, 0xa0, 0x20); + else + ret |= m88rs2000_writereg(state, 0xa0, 0x60); + + ret |= m88rs2000_writereg(state, 0xa1, 0xe0); + + if (srate > 12000000) + ret |= m88rs2000_writereg(state, 0xa3, 0x20); + else if (srate > 2800000) + ret |= m88rs2000_writereg(state, 0xa3, 0x98); + else + ret |= m88rs2000_writereg(state, 0xa3, 0x90); + deb_info("m88rs2000: m88rs2000_set_symbolrate\n"); return ret; } @@ -307,8 +327,6 @@ struct inittab m88rs2000_shutdown[] = { struct inittab fe_reset[] = { {DEMOD_WRITE, 0x00, 0x01}, - {DEMOD_WRITE, 0xf1, 0xbf}, - {DEMOD_WRITE, 0x00, 0x01}, {DEMOD_WRITE, 0x20, 0x81}, {DEMOD_WRITE, 0x21, 0x80}, {DEMOD_WRITE, 0x10, 0x33}, @@ -351,9 +369,6 @@ struct inittab fe_trigger[] = { {DEMOD_WRITE, 0x9b, 0x64}, {DEMOD_WRITE, 0x9e, 0x00}, {DEMOD_WRITE, 0x9f, 0xf8}, - {DEMOD_WRITE, 0xa0, 0x20}, - {DEMOD_WRITE, 0xa1, 0xe0}, - {DEMOD_WRITE, 0xa3, 0x38}, {DEMOD_WRITE, 0x98, 0xff}, {DEMOD_WRITE, 0xc0, 0x0f}, {DEMOD_WRITE, 0x89, 0x01}, @@ -625,8 +640,13 @@ static int m88rs2000_set_frontend(struct dvb_frontend *fe) if (ret < 0) return -ENODEV; - /* Reset Demod */ - ret = m88rs2000_tab_set(state, fe_reset); + /* Reset demod by symbol rate */ + if (c->symbol_rate > 27500000) + ret = m88rs2000_writereg(state, 0xf1, 0xa4); + else + ret = m88rs2000_writereg(state, 0xf1, 0xbf); + + ret |= m88rs2000_tab_set(state, fe_reset); if (ret < 0) return -ENODEV; |