From d22bb548b23c4281fc0fa0862333d912069752ae Mon Sep 17 00:00:00 2001 From: Amaury Pouly Date: Thu, 9 Nov 2017 23:01:24 +0100 Subject: rda5802: document some registers This information is available in the RDA5802N or RDA5807 datasheet. I suspect that register SYSCONFIG6 is not actually used by the tuner. Based on an obscure statement in the datasheet, I guess SYSCONFIG5 is a frequency in Khz called freq_direct that offsets the lower band frequency (56/67 MHz) but 1) it is not enabled (FREQ_MODE=0) and 2) it is not clear if this offset is really just to avoid interference (ie the RF and IF are simply shifted by this amount) or an actual offset. Change-Id: Ia469f5370aee7c8c3390324d0cef1193c64df755 --- firmware/drivers/tuner/rda5802.c | 14 +++++++------- 1 file changed, 7 insertions(+), 7 deletions(-) diff --git a/firmware/drivers/tuner/rda5802.c b/firmware/drivers/tuner/rda5802.c index 3f122714bd..55e775e985 100644 --- a/firmware/drivers/tuner/rda5802.c +++ b/firmware/drivers/tuner/rda5802.c @@ -48,9 +48,9 @@ #define SYSCONFIG1 0x4 #define SYSCONFIG2 0x5 #define SYSCONFIG3 0x6 -#define SYSCONFIG4 0x7 /* undocumented */ -#define SYSCONFIG5 0x8 /* undocumented */ -#define SYSCONFIG6 0x9 /* undocumented */ +#define SYSCONFIG4 0x7 +#define SYSCONFIG5 0x8 +#define SYSCONFIG6 0x9 /* suspected not to exists */ #define READCHAN 0xA #define STATUSRSSI 0xB @@ -81,7 +81,7 @@ /* SYSCONFIG1 (0x4) */ #define SYSCONFIG1_DE (0x1 << 11) - #define SYSCONFIG1_SOFTMUTE_EN (0x1 << 9) +#define SYSCONFIG1_SOFTMUTE_EN (0x1 << 9) /* SYSCONFIG2 (0x5) */ #define SYSCONFIG2_VOLUME (0xF << 0) @@ -105,9 +105,9 @@ static uint16_t cache[16] = { [SYSCONFIG1] = 0x0200, /* SYSCONFIG1_SOFTMUTE_EN */ [SYSCONFIG2] = 0x867F, /* INT_MODE (def), SEEKTH=1100b, LNA_PORT_SEL=LNAN, LNA_ICSEL=3.0mA, VOLUME=max */ - [SYSCONFIG3] = 0x8000, /* I2S slave mode */ - [SYSCONFIG4] = 0x4712, /* undocumented, affects stereo blend */ - [SYSCONFIG5] = 0x5EC6, /* undocumented */ + [SYSCONFIG3] = 0x8000, /* RSVD */ + [SYSCONFIG4] = 0x4712, /* TH_SOFRBLEND=34dB, 65M_50M MODE=65~76MHz, RSVD, SEEK_TH_OLD=4, SOFTBLEND_EN */ + [SYSCONFIG5] = 0x5EC6, /* FREQ_DIRECT=24262kHz (unused) */ [SYSCONFIG6] = 0x0000 /* undocumented */ }; -- cgit v1.2.3