From patchwork Wed Jun 29 23:39:47 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Antti Palosaari X-Patchwork-Id: 9206339 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id CADAA6075F for ; Wed, 29 Jun 2016 23:40:08 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id BC5DA284BC for ; Wed, 29 Jun 2016 23:40:08 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id B12C628609; Wed, 29 Jun 2016 23:40:08 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 2AD96284BC for ; Wed, 29 Jun 2016 23:40:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751698AbcF2XkF (ORCPT ); Wed, 29 Jun 2016 19:40:05 -0400 Received: from mail.kapsi.fi ([217.30.184.167]:40926 "EHLO mail.kapsi.fi" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751585AbcF2XkA (ORCPT ); Wed, 29 Jun 2016 19:40:00 -0400 Received: from dyn3-82-128-188-182.psoas.suomi.net ([82.128.188.182] helo=localhost.localdomain.localdomain) by mail.kapsi.fi with esmtpsa (TLS1.2:DHE_RSA_AES_256_CBC_SHA256:256) (Exim 4.80) (envelope-from ) id 1bIP5K-00087D-Fw; Thu, 30 Jun 2016 02:39:58 +0300 From: Antti Palosaari To: linux-media@vger.kernel.org Cc: Antti Palosaari Subject: [PATCH 4/5] m88ds3103: use Hz instead of kHz on calculations Date: Thu, 30 Jun 2016 02:39:47 +0300 Message-Id: <1467243588-26204-4-git-send-email-crope@iki.fi> X-Mailer: git-send-email 2.4.11 In-Reply-To: <1467243588-26204-1-git-send-email-crope@iki.fi> References: <1467243588-26204-1-git-send-email-crope@iki.fi> X-SA-Exim-Connect-IP: 82.128.188.182 X-SA-Exim-Mail-From: crope@iki.fi X-SA-Exim-Scanned: No (on mail.kapsi.fi); SAEximRunCond expanded to false Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP There was some calculations where was kHz used in order to keep calculation withing 32-bit. Convert all to Hz and use 64-bit division helpers where needed. Signed-off-by: Antti Palosaari --- drivers/media/dvb-frontends/m88ds3103.c | 50 ++++++++++++++-------------- drivers/media/dvb-frontends/m88ds3103_priv.h | 3 +- 2 files changed, 26 insertions(+), 27 deletions(-) diff --git a/drivers/media/dvb-frontends/m88ds3103.c b/drivers/media/dvb-frontends/m88ds3103.c index fae9251..5158bf3 100644 --- a/drivers/media/dvb-frontends/m88ds3103.c +++ b/drivers/media/dvb-frontends/m88ds3103.c @@ -307,7 +307,7 @@ static int m88ds3103_set_frontend(struct dvb_frontend *fe) u8 u8tmp, u8tmp1 = 0, u8tmp2 = 0; /* silence compiler warning */ u8 buf[3]; u16 u16tmp; - u32 tuner_frequency, target_mclk; + u32 tuner_frequency_khz, target_mclk; s32 s32tmp; dev_dbg(&client->dev, @@ -344,7 +344,7 @@ static int m88ds3103_set_frontend(struct dvb_frontend *fe) } if (fe->ops.tuner_ops.get_frequency) { - ret = fe->ops.tuner_ops.get_frequency(fe, &tuner_frequency); + ret = fe->ops.tuner_ops.get_frequency(fe, &tuner_frequency_khz); if (ret) goto err; } else { @@ -353,20 +353,20 @@ static int m88ds3103_set_frontend(struct dvb_frontend *fe) * actual frequency used. Carrier offset calculation is not * valid. */ - tuner_frequency = c->frequency; + tuner_frequency_khz = c->frequency; } /* select M88RS6000 demod main mclk and ts mclk from tuner die. */ if (dev->chip_id == M88RS6000_CHIP_ID) { if (c->symbol_rate > 45010000) - dev->mclk_khz = 110250; + dev->mclk = 110250000; else - dev->mclk_khz = 96000; + dev->mclk = 96000000; if (c->delivery_system == SYS_DVBS) - target_mclk = 96000; + target_mclk = 96000000; else - target_mclk = 144000; + target_mclk = 144000000; /* Enable demod clock path */ ret = regmap_write(dev->regmap, 0x06, 0x00); @@ -375,7 +375,7 @@ static int m88ds3103_set_frontend(struct dvb_frontend *fe) usleep_range(10000, 20000); } else { /* set M88DS3103 mclk and ts mclk. */ - dev->mclk_khz = 96000; + dev->mclk = 96000000; switch (dev->cfg->ts_mode) { case M88DS3103_TS_SERIAL: @@ -385,14 +385,14 @@ static int m88ds3103_set_frontend(struct dvb_frontend *fe) case M88DS3103_TS_PARALLEL: case M88DS3103_TS_CI: if (c->delivery_system == SYS_DVBS) - target_mclk = 96000; + target_mclk = 96000000; else { if (c->symbol_rate < 18000000) - target_mclk = 96000; + target_mclk = 96000000; else if (c->symbol_rate < 28000000) - target_mclk = 144000; + target_mclk = 144000000; else - target_mclk = 192000; + target_mclk = 192000000; } break; default: @@ -402,15 +402,15 @@ static int m88ds3103_set_frontend(struct dvb_frontend *fe) } switch (target_mclk) { - case 96000: + case 96000000: u8tmp1 = 0x02; /* 0b10 */ u8tmp2 = 0x01; /* 0b01 */ break; - case 144000: + case 144000000: u8tmp1 = 0x00; /* 0b00 */ u8tmp2 = 0x01; /* 0b01 */ break; - case 192000: + case 192000000: u8tmp1 = 0x03; /* 0b11 */ u8tmp2 = 0x00; /* 0b00 */ break; @@ -464,8 +464,8 @@ static int m88ds3103_set_frontend(struct dvb_frontend *fe) } if (dev->chip_id == M88RS6000_CHIP_ID) { - if ((c->delivery_system == SYS_DVBS2) - && ((c->symbol_rate / 1000) <= 5000)) { + if (c->delivery_system == SYS_DVBS2 && + c->symbol_rate <= 5000000) { ret = regmap_write(dev->regmap, 0xc0, 0x04); if (ret) goto err; @@ -532,7 +532,7 @@ static int m88ds3103_set_frontend(struct dvb_frontend *fe) u8tmp2 = DIV_ROUND_UP(u16tmp, 2) - 1; } - dev_dbg(&client->dev, "target_mclk=%d ts_clk=%d ts_clk_divide_ratio=%u\n", + dev_dbg(&client->dev, "target_mclk=%u ts_clk=%u ts_clk_divide_ratio=%u\n", target_mclk, dev->cfg->ts_clk, u16tmp); /* u8tmp1[5:2] => fe[3:0], u8tmp1[1:0] => ea[7:6] */ @@ -569,7 +569,7 @@ static int m88ds3103_set_frontend(struct dvb_frontend *fe) if (ret) goto err; - u16tmp = DIV_ROUND_CLOSEST((c->symbol_rate / 1000) << 15, dev->mclk_khz / 2); + u16tmp = DIV_ROUND_CLOSEST_ULL((u64)c->symbol_rate * 0x10000, dev->mclk); buf[0] = (u16tmp >> 0) & 0xff; buf[1] = (u16tmp >> 8) & 0xff; ret = regmap_bulk_write(dev->regmap, 0x61, buf, 2); @@ -589,10 +589,11 @@ static int m88ds3103_set_frontend(struct dvb_frontend *fe) goto err; dev_dbg(&client->dev, "carrier offset=%d\n", - (tuner_frequency - c->frequency)); + (tuner_frequency_khz - c->frequency)); - s32tmp = 0x10000 * (tuner_frequency - c->frequency); - s32tmp = DIV_ROUND_CLOSEST(s32tmp, dev->mclk_khz); + /* Use 32-bit calc as there is no s64 version of DIV_ROUND_CLOSEST() */ + s32tmp = 0x10000 * (tuner_frequency_khz - c->frequency); + s32tmp = DIV_ROUND_CLOSEST(s32tmp, dev->mclk / 1000); buf[0] = (s32tmp >> 0) & 0xff; buf[1] = (s32tmp >> 8) & 0xff; ret = regmap_bulk_write(dev->regmap, 0x5e, buf, 2); @@ -937,8 +938,7 @@ static int m88ds3103_get_frontend(struct dvb_frontend *fe, if (ret) goto err; - c->symbol_rate = 1ull * ((buf[1] << 8) | (buf[0] << 0)) * - dev->mclk_khz * 1000 / 0x10000; + c->symbol_rate = DIV_ROUND_CLOSEST_ULL((u64)(buf[1] << 8 | buf[0] << 0) * dev->mclk, 0x10000); return 0; err: @@ -1381,7 +1381,7 @@ static int m88ds3103_probe(struct i2c_client *client, dev->config.clock = pdata->clk; dev->config.i2c_wr_max = pdata->i2c_wr_max; dev->config.ts_mode = pdata->ts_mode; - dev->config.ts_clk = pdata->ts_clk; + dev->config.ts_clk = pdata->ts_clk * 1000; dev->config.ts_clk_pol = pdata->ts_clk_pol; dev->config.spec_inv = pdata->spec_inv; dev->config.agc_inv = pdata->agc_inv; diff --git a/drivers/media/dvb-frontends/m88ds3103_priv.h b/drivers/media/dvb-frontends/m88ds3103_priv.h index d78e467..07f20c2 100644 --- a/drivers/media/dvb-frontends/m88ds3103_priv.h +++ b/drivers/media/dvb-frontends/m88ds3103_priv.h @@ -27,7 +27,6 @@ #define M88DS3103_FIRMWARE "dvb-demod-m88ds3103.fw" #define M88RS6000_FIRMWARE "dvb-demod-m88rs6000.fw" -#define M88DS3103_MCLK_KHZ 96000 #define M88RS6000_CHIP_ID 0x74 #define M88DS3103_CHIP_ID 0x70 @@ -46,7 +45,7 @@ struct m88ds3103_dev { /* auto detect chip id to do different config */ u8 chip_id; /* main mclk is calculated for M88RS6000 dynamically */ - s32 mclk_khz; + s32 mclk; u64 post_bit_error; u64 post_bit_count; };