From patchwork Mon Feb 17 06:56:02 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?b?Q2h1bi1IdW5nIFd1ICjlt6vpp7/lro8p?= X-Patchwork-Id: 11385415 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 4A07A138D for ; Mon, 17 Feb 2020 06:56:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 29DDF20679 for ; Mon, 17 Feb 2020 06:56:49 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=mediatek.com header.i=@mediatek.com header.b="p4SeIOL2" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726647AbgBQG4s (ORCPT ); Mon, 17 Feb 2020 01:56:48 -0500 Received: from mailgw01.mediatek.com ([210.61.82.183]:6658 "EHLO mailgw01.mediatek.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1725855AbgBQG4s (ORCPT ); Mon, 17 Feb 2020 01:56:48 -0500 X-UUID: 1802d54c9eda4d11bb9fbeb245679826-20200217 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=mediatek.com; s=dk; h=Content-Transfer-Encoding:Content-Type:MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:CC:To:From; bh=hxYCCL3/k4cibEcsvPHtckq0NXx5A2Fj9khz3ehuN+o=; b=p4SeIOL24J0WiZxgC4Ufbtv9qKDlfLq9rAF6TMXhyC/K5RNG7uyDjSd/Dmz4aKVKHtn36+Kq8e4RUNFYJrq11HLkxT7PWXfrIbEC8jh70vvwuXdJ6+0yS5yFFqNVIOsPJco0mEGZWK6zZdJQngGjyFnPr666ihOwAMeCuRAOzes=; X-UUID: 1802d54c9eda4d11bb9fbeb245679826-20200217 Received: from mtkexhb02.mediatek.inc [(172.21.101.103)] by mailgw01.mediatek.com (envelope-from ) (Cellopoint E-mail Firewall v4.1.10 Build 0809 with TLS) with ESMTP id 3879307; Mon, 17 Feb 2020 14:56:42 +0800 Received: from MTKCAS06.mediatek.inc (172.21.101.30) by mtkmbs05n1.mediatek.inc (172.21.101.15) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Mon, 17 Feb 2020 14:55:46 +0800 Received: from mtkswgap22.mediatek.inc (172.21.77.33) by MTKCAS06.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1395.4 via Frontend Transport; Mon, 17 Feb 2020 14:54:43 +0800 From: Chun-Hung Wu To: Chaotian Jing , Ulf Hansson , Rob Herring , Mark Rutland , Matthias Brugger , Linus Walleij , Pavel Machek , Kate Stewart , Greg Kroah-Hartman , Martin Blumenstingl , Pan Bian , Thomas Gleixner , Allison Randal , Mathieu Malaterre , Stanley Chu , Kuohong Wang CC: , , , , , , , Chun-Hung Wu Subject: [PATCH v3 2/4] mmc: mediatek: refine msdc timeout api Date: Mon, 17 Feb 2020 14:56:02 +0800 Message-ID: <1581922564-24914-3-git-send-email-chun-hung.wu@mediatek.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1581922564-24914-1-git-send-email-chun-hung.wu@mediatek.com> References: <1581922564-24914-1-git-send-email-chun-hung.wu@mediatek.com> MIME-Version: 1.0 X-MTK: N Sender: linux-mmc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-mmc@vger.kernel.org Extract msdc timeout api common part to have better code architecture and avoid redundent code. Signed-off-by: Chun-Hung Wu --- drivers/mmc/host/mtk-sd.c | 32 ++++++++++++++++++++++---------- 1 file changed, 22 insertions(+), 10 deletions(-) diff --git a/drivers/mmc/host/mtk-sd.c b/drivers/mmc/host/mtk-sd.c index 189e426..127b0cf 100644 --- a/drivers/mmc/host/mtk-sd.c +++ b/drivers/mmc/host/mtk-sd.c @@ -698,21 +698,21 @@ static void msdc_unprepare_data(struct msdc_host *host, struct mmc_request *mrq) } } -/* clock control primitives */ -static void msdc_set_timeout(struct msdc_host *host, u32 ns, u32 clks) +static u64 msdc_timeout_cal(struct msdc_host *host, u64 ns, u64 clks) { - u32 timeout, clk_ns; + u64 timeout, clk_ns; u32 mode = 0; - host->timeout_ns = ns; - host->timeout_clks = clks; if (host->mmc->actual_clock == 0) { timeout = 0; } else { - clk_ns = 1000000000UL / host->mmc->actual_clock; - timeout = (ns + clk_ns - 1) / clk_ns + clks; + clk_ns = 1000000000ULL; + do_div(clk_ns, host->mmc->actual_clock); + timeout = ns + clk_ns - 1; + do_div(timeout, clk_ns); + timeout += clks; /* in 1048576 sclk cycle unit */ - timeout = (timeout + (0x1 << 20) - 1) >> 20; + timeout = DIV_ROUND_UP(timeout, (0x1 << 20)); if (host->dev_comp->clk_div_bits == 8) sdr_get_field(host->base + MSDC_CFG, MSDC_CFG_CKMOD, &mode); @@ -722,9 +722,21 @@ static void msdc_set_timeout(struct msdc_host *host, u32 ns, u32 clks) /*DDR mode will double the clk cycles for data timeout */ timeout = mode >= 2 ? timeout * 2 : timeout; timeout = timeout > 1 ? timeout - 1 : 0; - timeout = timeout > 255 ? 255 : timeout; } - sdr_set_field(host->base + SDC_CFG, SDC_CFG_DTOC, timeout); + return timeout; +} + +/* clock control primitives */ +static void msdc_set_timeout(struct msdc_host *host, u64 ns, u64 clks) +{ + u64 timeout; + + host->timeout_ns = ns; + host->timeout_clks = clks; + + timeout = msdc_timeout_cal(host, ns, clks); + sdr_set_field(host->base + SDC_CFG, SDC_CFG_DTOC, + (u32)(timeout > 255 ? 255 : timeout)); } static void msdc_gate_clock(struct msdc_host *host)