From patchwork Wed Jan 11 08:50:14 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= X-Patchwork-Id: 1724527 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@legolas.ozlabs.org Authentication-Results: legolas.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org (client-ip=209.51.188.17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) Authentication-Results: legolas.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=linaro.org header.i=@linaro.org header.a=rsa-sha256 header.s=google header.b=pke7i96a; dkim-atps=neutral Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-ECDSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by legolas.ozlabs.org (Postfix) with ESMTPS id 4NsLyl5mZgz23f3 for ; Wed, 11 Jan 2023 19:51:58 +1100 (AEDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1pFWos-0003Pf-8U; Wed, 11 Jan 2023 03:50:50 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1pFWof-0003Gd-7m for qemu-devel@nongnu.org; Wed, 11 Jan 2023 03:50:38 -0500 Received: from mail-wm1-x335.google.com ([2a00:1450:4864:20::335]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1pFWod-0007e7-5A for qemu-devel@nongnu.org; Wed, 11 Jan 2023 03:50:36 -0500 Received: by mail-wm1-x335.google.com with SMTP id c4-20020a1c3504000000b003d9e2f72093so8981328wma.1 for ; Wed, 11 Jan 2023 00:50:34 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=iDnNDu+oMICH4wdH8XoWszonkd1H38BArRChhxQlZUY=; b=pke7i96aicODUbCCMtqiAD2ggXYbBh6JXivqZQnOJcDKrpvoEqSo2zJdwGmIvBl5xg yZwHRTWd1YcQeBG+IwX5uOKCEduo52I6In69jv0X3S+YzGAcTVX6D0+Y6dbTU7Ls/ad6 bpGKkwtYpbh5ye2Mel9659WNHyoPyvd2vAe8xzniRJjNwgIaSltGBiE3KpXY5RDlDjA5 VY1uw59ca2BZAylmcBhhjm7nP30hl6mqix6EXJu7RvSjUvSro24XUOI1CW0k7mff1ME0 8rcb7+Im4ceBdlUokHnO+nITYF+LRaqfnoRhvTL+f/HX6yNDRbhZfgyaTg4dMtayr4Ew lxeg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=iDnNDu+oMICH4wdH8XoWszonkd1H38BArRChhxQlZUY=; b=mIgS7iGkvehZYr/Or5yNNr9OuQndQjvQTo0A/KtaIsaTDowg0M8n+Yjck2bo0gVEc2 o5NbGstY1STtZXVRRfktv3cS3wj8T9YbWXJp1vZOt+t5JpMAxnxDs0G9qd6xSW2baTrX IWRUmSH92tUqa4xxf92VPIwN2W2z/JOeDCL8z4NRvP4LTKfwCsnsYyLzy553uJ4QleFs OllTGq5HkEdJf2u6YTwmi7GfMuOpm3UD7zglNxuOn6G2brica50Y3o3VHztk2a/praJz yu3koGxfIwYa2b+8fAxroTuVXKMnIPMoIoVkBXN0ZU1Kn1sfOPqPg+dg8WHIaEU/C3Lx ThnQ== X-Gm-Message-State: AFqh2koGtTt4U072lngFBzUC8olu4gKRYv0sjyL1OV0x946s37PPUq4P fO3YCzn5potrhH5fug8Go9VZXhzOumJzEgNw X-Google-Smtp-Source: AMrXdXtR5fpEqXEMcvIzxT3owtyy580OHRs6/GXRuZNjjol0zz/4defvgga/RFXw4+yvcXnASFzN8Q== X-Received: by 2002:a05:600c:1d25:b0:3d3:50b9:b192 with SMTP id l37-20020a05600c1d2500b003d350b9b192mr61983619wms.18.1673427033020; Wed, 11 Jan 2023 00:50:33 -0800 (PST) Received: from localhost.localdomain ([81.0.6.76]) by smtp.gmail.com with ESMTPSA id o19-20020a05600c511300b003d9862ec435sm5964179wms.20.2023.01.11.00.50.32 (version=TLS1_3 cipher=TLS_CHACHA20_POLY1305_SHA256 bits=256/256); Wed, 11 Jan 2023 00:50:32 -0800 (PST) From: =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= To: qemu-devel@nongnu.org Cc: qemu-arm@nongnu.org, Peter Maydell , Thomas Huth , Jan Kiszka , qemu-trivial@nongnu.org, =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= , Richard Henderson Subject: [PATCH v3 3/5] hw/i2c/bitbang_i2c: Change state calling bitbang_i2c_set_state() helper Date: Wed, 11 Jan 2023 09:50:14 +0100 Message-Id: <20230111085016.44551-4-philmd@linaro.org> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20230111085016.44551-1-philmd@linaro.org> References: <20230111085016.44551-1-philmd@linaro.org> MIME-Version: 1.0 Received-SPF: pass client-ip=2a00:1450:4864:20::335; envelope-from=philmd@linaro.org; helo=mail-wm1-x335.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Signed-off-by: Philippe Mathieu-Daudé Reviewed-by: Richard Henderson --- hw/i2c/bitbang_i2c.c | 23 +++++++++++++++-------- 1 file changed, 15 insertions(+), 8 deletions(-) diff --git a/hw/i2c/bitbang_i2c.c b/hw/i2c/bitbang_i2c.c index e41cb63daa..bf4b781393 100644 --- a/hw/i2c/bitbang_i2c.c +++ b/hw/i2c/bitbang_i2c.c @@ -26,13 +26,19 @@ do { printf("bitbang_i2c: " fmt , ## __VA_ARGS__); } while (0) #define DPRINTF(fmt, ...) do {} while(0) #endif +static void bitbang_i2c_set_state(bitbang_i2c_interface *i2c, + bitbang_i2c_state state) +{ + i2c->state = state; +} + static void bitbang_i2c_enter_stop(bitbang_i2c_interface *i2c) { DPRINTF("STOP\n"); if (i2c->current_addr >= 0) i2c_end_transfer(i2c->bus); i2c->current_addr = -1; - i2c->state = STOPPED; + bitbang_i2c_set_state(i2c, STOPPED); } /* Set device data pin. */ @@ -69,7 +75,7 @@ int bitbang_i2c_set(bitbang_i2c_interface *i2c, int line, int level) if (level == 0) { DPRINTF("START\n"); /* START condition. */ - i2c->state = SENDING_BIT7; + bitbang_i2c_set_state(i2c, SENDING_BIT7); i2c->current_addr = -1; } else { /* STOP condition. */ @@ -96,7 +102,7 @@ int bitbang_i2c_set(bitbang_i2c_interface *i2c, int line, int level) case SENDING_BIT7 ... SENDING_BIT0: i2c->buffer = (i2c->buffer << 1) | data; /* will end up in WAITING_FOR_ACK */ - i2c->state++; + bitbang_i2c_set_state(i2c, i2c->state + 1); return bitbang_i2c_ret(i2c, 1); case WAITING_FOR_ACK: @@ -117,13 +123,14 @@ int bitbang_i2c_set(bitbang_i2c_interface *i2c, int line, int level) * device we were sending to decided to NACK us). */ DPRINTF("Got NACK\n"); + bitbang_i2c_set_state(i2c, SENT_NACK); bitbang_i2c_enter_stop(i2c); return bitbang_i2c_ret(i2c, 1); } if (i2c->current_addr & 1) { - i2c->state = RECEIVING_BIT7; + bitbang_i2c_set_state(i2c, RECEIVING_BIT7); } else { - i2c->state = SENDING_BIT7; + bitbang_i2c_set_state(i2c, SENDING_BIT7); } return bitbang_i2c_ret(i2c, 0); } @@ -134,18 +141,18 @@ int bitbang_i2c_set(bitbang_i2c_interface *i2c, int line, int level) case RECEIVING_BIT6 ... RECEIVING_BIT0: data = i2c->buffer >> 7; /* will end up in SENDING_ACK */ - i2c->state++; + bitbang_i2c_set_state(i2c, i2c->state + 1); i2c->buffer <<= 1; return bitbang_i2c_ret(i2c, data); case SENDING_ACK: - i2c->state = RECEIVING_BIT7; if (data != 0) { DPRINTF("NACKED\n"); - i2c->state = SENT_NACK; + bitbang_i2c_set_state(i2c, SENT_NACK); i2c_nack(i2c->bus); } else { DPRINTF("ACKED\n"); + bitbang_i2c_set_state(i2c, RECEIVING_BIT7); } return bitbang_i2c_ret(i2c, 1); }