From patchwork Wed May 25 08:34:46 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hans Petter Selasky X-Patchwork-Id: 815292 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by demeter2.kernel.org (8.14.4/8.14.3) with ESMTP id p4P8ab0s007192 for ; Wed, 25 May 2011 08:36:37 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933168Ab1EYIga (ORCPT ); Wed, 25 May 2011 04:36:30 -0400 Received: from mailfe03.c2i.net ([212.247.154.66]:40924 "EHLO swip.net" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S932933Ab1EYIgD convert rfc822-to-8bit (ORCPT ); Wed, 25 May 2011 04:36:03 -0400 X-Cloudmark-Score: 0.000000 [] X-Cloudmark-Analysis: v=1.1 cv=0KkIQGagYCvnrzE3Z2Lmid87OPdbX6VLcZYwAuLMZ50= c=1 sm=1 a=SvYTsOw2Z4kA:10 a=ur3GO1xt07kA:10 a=WQU8e4WWZSUA:10 a=kj9zAlcOel0A:10 a=CL8lFSKtTFcA:10 a=i9M/sDlu2rpZ9XS819oYzg==:17 a=8kQB0OdkAAAA:8 a=FxOIGl7BR9lp_no964wA:9 a=CjuIK1q_8ugA:10 a=9aOQ2cSd83gA:10 a=i9M/sDlu2rpZ9XS819oYzg==:117 Received: from [188.126.198.129] (account mc467741@c2i.net HELO laptop002.hselasky.homeunix.org) by mailfe03.swip.net (CommuniGate Pro SMTP 5.2.19) with ESMTPA id 131544002 for linux-media@vger.kernel.org; Wed, 25 May 2011 10:36:00 +0200 From: Hans Petter Selasky To: "linux-media@vger.kernel.org" Subject: [PATCH v2] Fix the derot zig-zag to work with TT-USB2.0 TechnoTrend Date: Wed, 25 May 2011 10:34:46 +0200 User-Agent: KMail/1.13.5 (FreeBSD/8.2-STABLE; KDE/4.4.5; amd64; ; ) X-Face: *nPdTl_}RuAI6^PVpA02T?$%Xa^>@hE0uyUIoiha$pC:9TVgl.Oq,NwSZ4V" =?utf-8?q?=7CLR=2E+tj=7Dg5=0A=09=25V?=,x^qOs~mnU3]Gn; cQLv&.N>TrxmSFf+p6(30a/{)KUU!s}w\IhQBj}[g}bj0I3^glmC( =?utf-8?q?=0A=09=3AAuzV9=3A=2EhESm-x4h240C=609=3Dw?= MIME-Version: 1.0 Message-Id: <201105251034.47058.hselasky@c2i.net> Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org X-Greylist: IP, sender and recipient auto-whitelisted, not delayed by milter-greylist-4.2.6 (demeter2.kernel.org [140.211.167.43]); Wed, 25 May 2011 08:36:37 +0000 (UTC) (The initial patch cause too long tune delay on non-present carriers. Use the hardware derot, by writing zero to the derot register.) From 2b960abaeeaa32f6bcaa350ca80906c467ab9cb1 Mon Sep 17 00:00:00 2001 From: Hans Petter Selasky Date: Tue, 24 May 2011 21:44:53 +0200 Subject: [PATCH] Fix the derot zig-zag to work with TT-USB2.0 TechnoTrend hardware. Signed-off-by: Hans Petter Selasky --- drivers/media/dvb/frontends/stb0899_algo.c | 130 ++++++++-------------------- drivers/media/dvb/frontends/stb0899_priv.h | 2 - 2 files changed, 36 insertions(+), 96 deletions(-) diff --git a/drivers/media/dvb/frontends/stb0899_algo.c b/drivers/media/dvb/frontends/stb0899_algo.c index d70eee0..0cdaac2 100644 --- a/drivers/media/dvb/frontends/stb0899_algo.c +++ b/drivers/media/dvb/frontends/stb0899_algo.c @@ -117,7 +117,7 @@ static u32 stb0899_set_srate(struct stb0899_state *state, u32 master_clk, u32 sr */ static long stb0899_calc_derot_time(long srate) { - if (srate > 0) + if (srate > 999) return (100000 / (srate / 1000)); else return 0; @@ -207,36 +207,23 @@ static enum stb0899_status stb0899_search_tmg(struct stb0899_state *state) { struct stb0899_internal *internal = &state->internal; struct stb0899_params *params = &state->params; - - short int derot_step, derot_freq = 0, derot_limit, next_loop = 3; - int index = 0; - u8 cfr[2]; + int index; + u8 cfr[2] = {0,0}; internal->status = NOTIMING; - /* timing loop computation & symbol rate optimisation */ - derot_limit = (internal->sub_range / 2L) / internal->mclk; - derot_step = (params->srate / 2L) / internal->mclk; - - while ((stb0899_check_tmg(state) != TIMINGOK) && next_loop) { - index++; - derot_freq += index * internal->direction * derot_step; /* next derot zig zag position */ + /* let the hardware figure out derot frequency */ + stb0899_write_regs(state, STB0899_CFRM, cfr, 2); /* derotator frequency */ - if (abs(derot_freq) > derot_limit) - next_loop--; - - if (next_loop) { - STB0899_SETFIELD_VAL(CFRM, cfr[0], MSB(state->config->inversion * derot_freq)); - STB0899_SETFIELD_VAL(CFRL, cfr[1], LSB(state->config->inversion * derot_freq)); - stb0899_write_regs(state, STB0899_CFRM, cfr, 2); /* derotator frequency */ + for (index = 0; index < 8; index++) { + if (stb0899_check_tmg(state) == TIMINGOK) { + /* get derotator frequency */ + stb0899_read_regs(state, STB0899_CFRM, cfr, 2); + internal->derot_freq = state->config->inversion * MAKEWORD16(cfr[0], cfr[1]); + dprintk(state->verbose, FE_DEBUG, 1, "------->TIMING OK ! " + "Derot Freq = %d", internal->derot_freq); + break; } - internal->direction = -internal->direction; /* Change zigzag direction */ - } - - if (internal->status == TIMINGOK) { - stb0899_read_regs(state, STB0899_CFRM, cfr, 2); /* get derotator frequency */ - internal->derot_freq = state->config->inversion * MAKEWORD16(cfr[0], cfr[1]); - dprintk(state->verbose, FE_DEBUG, 1, "------->TIMING OK ! Derot Freq = %d", internal->derot_freq); } return internal->status; @@ -277,50 +264,25 @@ static enum stb0899_status stb0899_check_carrier(struct stb0899_state *state) static enum stb0899_status stb0899_search_carrier(struct stb0899_state *state) { struct stb0899_internal *internal = &state->internal; - - short int derot_freq = 0, last_derot_freq = 0, derot_limit, next_loop = 3; - int index = 0; + int index; u8 cfr[2]; u8 reg; internal->status = NOCARRIER; - derot_limit = (internal->sub_range / 2L) / internal->mclk; - derot_freq = internal->derot_freq; reg = stb0899_read_reg(state, STB0899_CFD); STB0899_SETFIELD_VAL(CFD_ON, reg, 1); stb0899_write_reg(state, STB0899_CFD, reg); - do { - dprintk(state->verbose, FE_DEBUG, 1, "Derot Freq=%d, mclk=%d", derot_freq, internal->mclk); - if (stb0899_check_carrier(state) == NOCARRIER) { - index++; - last_derot_freq = derot_freq; - derot_freq += index * internal->direction * internal->derot_step; /* next zig zag derotator position */ - - if(abs(derot_freq) > derot_limit) - next_loop--; - - if (next_loop) { - reg = stb0899_read_reg(state, STB0899_CFD); - STB0899_SETFIELD_VAL(CFD_ON, reg, 1); - stb0899_write_reg(state, STB0899_CFD, reg); - - STB0899_SETFIELD_VAL(CFRM, cfr[0], MSB(state->config- >inversion * derot_freq)); - STB0899_SETFIELD_VAL(CFRL, cfr[1], LSB(state->config- >inversion * derot_freq)); - stb0899_write_regs(state, STB0899_CFRM, cfr, 2); /* derotator frequency */ - } + for (index = 0; index < 8; index++) { + if (stb0899_check_carrier(state) == CARRIEROK) { + /* get derotator frequency */ + stb0899_read_regs(state, STB0899_CFRM, cfr, 2); + internal->derot_freq = state->config->inversion * MAKEWORD16(cfr[0], cfr[1]); + dprintk(state->verbose, FE_DEBUG, 1, "----> CARRIER OK !, " + "Derot Freq=%d", internal->derot_freq); + break; } - - internal->direction = -internal->direction; /* Change zigzag direction */ - } while ((internal->status != CARRIEROK) && next_loop); - - if (internal->status == CARRIEROK) { - stb0899_read_regs(state, STB0899_CFRM, cfr, 2); /* get derotator frequency */ - internal->derot_freq = state->config->inversion * MAKEWORD16(cfr[0], cfr[1]); - dprintk(state->verbose, FE_DEBUG, 1, "----> CARRIER OK !, Derot Freq=%d", internal->derot_freq); - } else { - internal->derot_freq = last_derot_freq; } return internal->status; @@ -384,46 +346,29 @@ static enum stb0899_status stb0899_check_data(struct stb0899_state *state) */ static enum stb0899_status stb0899_search_data(struct stb0899_state *state) { - short int derot_freq, derot_step, derot_limit, next_loop = 3; u8 cfr[2]; u8 reg; - int index = 1; + int index; struct stb0899_internal *internal = &state->internal; struct stb0899_params *params = &state->params; - derot_step = (params->srate / 4L) / internal->mclk; - derot_limit = (internal->sub_range / 2L) / internal->mclk; - derot_freq = internal->derot_freq; - - do { - if ((internal->status != CARRIEROK) || (stb0899_check_data(state) != DATAOK)) { - - derot_freq += index * internal->direction * derot_step; /* next zig zag derotator position */ - if (abs(derot_freq) > derot_limit) - next_loop--; + for (index = 0; index < 8; index++) { - if (next_loop) { - dprintk(state->verbose, FE_DEBUG, 1, "Derot freq=%d, mclk=%d", derot_freq, internal->mclk); - reg = stb0899_read_reg(state, STB0899_CFD); - STB0899_SETFIELD_VAL(CFD_ON, reg, 1); - stb0899_write_reg(state, STB0899_CFD, reg); - - STB0899_SETFIELD_VAL(CFRM, cfr[0], MSB(state->config- >inversion * derot_freq)); - STB0899_SETFIELD_VAL(CFRL, cfr[1], LSB(state->config- >inversion * derot_freq)); - stb0899_write_regs(state, STB0899_CFRM, cfr, 2); /* derotator frequency */ - - stb0899_check_carrier(state); - index++; - } + if ((internal->status == CARRIEROK) && + (stb0899_check_data(state) == DATAOK)) { + /* get derotator frequency */ + stb0899_read_regs(state, STB0899_CFRM, cfr, 2); + internal->derot_freq = state->config->inversion * MAKEWORD16(cfr[0], cfr[1]); + dprintk(state->verbose, FE_DEBUG, 1, "------> DATAOK ! Derot Freq=%d", internal->derot_freq); + break; } - internal->direction = -internal->direction; /* change zig zag direction */ - } while ((internal->status != DATAOK) && next_loop); - if (internal->status == DATAOK) { - stb0899_read_regs(state, STB0899_CFRM, cfr, 2); /* get derotator frequency */ - internal->derot_freq = state->config->inversion * MAKEWORD16(cfr[0], cfr[1]); - dprintk(state->verbose, FE_DEBUG, 1, "------> DATAOK ! Derot Freq=%d", internal->derot_freq); + reg = stb0899_read_reg(state, STB0899_CFD); + STB0899_SETFIELD_VAL(CFD_ON, reg, 1); + stb0899_write_reg(state, STB0899_CFD, reg); + + stb0899_check_carrier(state); } return internal->status; @@ -508,8 +453,6 @@ enum stb0899_status stb0899_dvbs_algo(struct stb0899_state *state) { 37, 36, 33, 32 } /* QPSK 7/8 */ }; - internal->direction = 1; - stb0899_set_srate(state, internal->master_clk, params->srate); /* Carrier loop optimization versus symbol rate for acquisition*/ if (params->srate <= 5000000) { @@ -553,7 +496,6 @@ enum stb0899_status stb0899_dvbs_algo(struct stb0899_state *state) internal->derot_percent, params->srate, internal->mclk); /* Initial calculations */ - internal->derot_step = internal->derot_percent * (params->srate / 1000L) / internal->mclk; /* DerotStep/1000 * Fsymbol */ internal->t_derot = stb0899_calc_derot_time(params->srate); internal->t_data = 500; diff --git a/drivers/media/dvb/frontends/stb0899_priv.h b/drivers/media/dvb/frontends/stb0899_priv.h index 82395b9..d26ced5 100644 --- a/drivers/media/dvb/frontends/stb0899_priv.h +++ b/drivers/media/dvb/frontends/stb0899_priv.h @@ -176,8 +176,6 @@ struct stb0899_internal { s16 derot_freq; /* Current derotator frequency (Hz) */ s16 derot_percent; - s16 direction; /* Current derotator search direction */ - s16 derot_step; /* Derotator step (binary value) */ s16 t_derot; /* Derotator time constant (ms) */ s16 t_data; /* Data recovery time constant (ms) */ s16 sub_dir; /* Direction of the next sub range */