From patchwork Tue Feb 1 16:30:05 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Patrick Venture X-Patchwork-Id: 1587354 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: bilbo.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=google.com header.i=@google.com header.a=rsa-sha256 header.s=20210112 header.b=I3N+O9s+; dkim-atps=neutral Authentication-Results: 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=) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by bilbo.ozlabs.org (Postfix) with ESMTPS id 4JpCfW1R7bz9sFh for ; Wed, 2 Feb 2022 05:10:57 +1100 (AEDT) Received: from localhost ([::1]:32996 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1nExcE-0005nM-Ar for incoming@patchwork.ozlabs.org; Tue, 01 Feb 2022 13:10:54 -0500 Received: from eggs.gnu.org ([209.51.188.92]:44834) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from <3EWD5YQcKCswDw5BC9wy66y3w.u648w4C-vwDw3565y5C.69y@flex--venture.bounces.google.com>) id 1nEw8b-0005gu-FN for qemu-devel@nongnu.org; Tue, 01 Feb 2022 11:36:17 -0500 Received: from [2607:f8b0:4864:20::b4a] (port=33540 helo=mail-yb1-xb4a.google.com) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from <3EWD5YQcKCswDw5BC9wy66y3w.u648w4C-vwDw3565y5C.69y@flex--venture.bounces.google.com>) id 1nEw8Y-0000Wc-SR for qemu-devel@nongnu.org; Tue, 01 Feb 2022 11:36:13 -0500 Received: by mail-yb1-xb4a.google.com with SMTP id u185-20020a2560c2000000b0060fd98540f7so34199968ybb.0 for ; Tue, 01 Feb 2022 08:36:00 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; h=date:message-id:mime-version:subject:from:to:cc; bh=7qgTSv2Qca38AF58tQe7sG2bmCZn6VioTVSnDScd/KU=; b=I3N+O9s+cJ/rxN7JHsvgKB7jxdZJA7Ifi4KA0ptB/nzGh4pkj2DDIAInK/bGekm4A+ ZcTivAUZfa19JsnUJ6XlEuxsJ8clUnZ9w/YoUaQ8/KVnIXyCuS2m9wxSo2f8Ct4ULB5J kDpr5ztbNC7Bn3kmpK00g8yQ/IBMeFv4t7Bl6PzCAjLbYQ/bV5zM5ZltiyNyZAVZ9euS a0nQHb//91jiTK8NH+0Il1R3K5OLXDk0pHo/FTKeXiVGBr5/897kyzhpFRHl4/fmwURc Iy2SmUEFj2DqPPAad4rNiNOirHi9jHCyU1JqhNL+8dHSXFtAoLn5esz9p7rPCsMoVhCu mN/Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:date:message-id:mime-version:subject:from:to:cc; bh=7qgTSv2Qca38AF58tQe7sG2bmCZn6VioTVSnDScd/KU=; b=B9KVDCxhVtBzYn8G5/RyTLmtiWoXpnT9EG9trG2fw8v5hPamJS3okteZLhEay+sGvG lSd2J5ecWSbSZv80/YFinv+ZisD2xYQGopRL2MQlYHbzCkFptcK0E1Bdwzlgwlq74S+e uDu7hFa38J4HHpMAutR4OLVbi2Df9G0A93eWPbmn2wedhuqvyPL51gWTjsl2siJdiOaW EeE4efPIp8KyJ+luRzA/VOTq0MXv8NBEUQ4gZX5MgSdEjlUmEgggFvscQkd0qhqvMmE8 dqOqUer7+vn7noJNVYTxmgvAI7OaV1wsGIZpwhJXDCfMX0jxr0ZSgJctUA3C87BxMpDE Gcyw== X-Gm-Message-State: AOAM532AE0ilZmI9IzaJPcMB0dXOhvFpc2CU3sekc+Zf8b0mUIFuA6Mq sZA26acWMaQcX/JLlmeeZCKn/gKS6aND X-Google-Smtp-Source: ABdhPJwPiE0FCf1Zt/LnnuVZ6UnGd78t7amm+fcNLWrt1FktI6MwF6RjYsPs61FAZ4QcWyRFabMhiw/F1egj X-Received: from venture.svl.corp.google.com ([2620:15c:2a3:200:5780:bdf0:5f14:9c50]) (user=venture job=sendgmr) by 2002:a81:24d8:: with SMTP id k207mr67ywk.151.1643733009606; Tue, 01 Feb 2022 08:30:09 -0800 (PST) Date: Tue, 1 Feb 2022 08:30:05 -0800 Message-Id: <20220201163005.989457-1-venture@google.com> Mime-Version: 1.0 X-Mailer: git-send-email 2.35.0.rc2.247.g8bbb082509-goog Subject: [PATCH] hw/i2c: flatten pca954x mux device From: Patrick Venture To: cminyard@mvista.com Cc: qemu-devel@nongnu.org, Patrick Venture , Hao Wu X-Host-Lookup-Failed: Reverse DNS lookup failed for 2607:f8b0:4864:20::b4a (failed) Received-SPF: pass client-ip=2607:f8b0:4864:20::b4a; envelope-from=3EWD5YQcKCswDw5BC9wy66y3w.u648w4C-vwDw3565y5C.69y@flex--venture.bounces.google.com; helo=mail-yb1-xb4a.google.com X-Spam_score_int: -87 X-Spam_score: -8.8 X-Spam_bar: -------- X-Spam_report: (-8.8 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_MED=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, PDS_HP_HELO_NORDNS=0.001, RCVD_IN_DNSWL_NONE=-0.0001, RDNS_NONE=0.793, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01, USER_IN_DEF_DKIM_WL=-7.5 autolearn=no 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" Previously this device created N subdevices which each owned an i2c bus. Now this device simply owns the N i2c busses directly. Tested: Verified devices behind mux are still accessible via qmp and i2c from within an arm32 SoC. Reviewed-by: Hao Wu Signed-off-by: Patrick Venture --- hw/i2c/i2c_mux_pca954x.c | 75 ++++++---------------------------------- 1 file changed, 11 insertions(+), 64 deletions(-) diff --git a/hw/i2c/i2c_mux_pca954x.c b/hw/i2c/i2c_mux_pca954x.c index 847c59921c..f9ce633b3a 100644 --- a/hw/i2c/i2c_mux_pca954x.c +++ b/hw/i2c/i2c_mux_pca954x.c @@ -30,24 +30,6 @@ #define PCA9548_CHANNEL_COUNT 8 #define PCA9546_CHANNEL_COUNT 4 -/* - * struct Pca954xChannel - The i2c mux device will have N of these states - * that own the i2c channel bus. - * @bus: The owned channel bus. - * @enabled: Is this channel active? - */ -typedef struct Pca954xChannel { - SysBusDevice parent; - - I2CBus *bus; - - bool enabled; -} Pca954xChannel; - -#define TYPE_PCA954X_CHANNEL "pca954x-channel" -#define PCA954X_CHANNEL(obj) \ - OBJECT_CHECK(Pca954xChannel, (obj), TYPE_PCA954X_CHANNEL) - /* * struct Pca954xState - The pca954x state object. * @control: The value written to the mux control. @@ -59,8 +41,8 @@ typedef struct Pca954xState { uint8_t control; - /* The channel i2c buses. */ - Pca954xChannel channel[PCA9548_CHANNEL_COUNT]; + bool enabled[PCA9548_CHANNEL_COUNT]; + I2CBus *bus[PCA9548_CHANNEL_COUNT]; } Pca954xState; /* @@ -98,11 +80,11 @@ static bool pca954x_match(I2CSlave *candidate, uint8_t address, } for (i = 0; i < mc->nchans; i++) { - if (!mux->channel[i].enabled) { + if (!mux->enabled[i]) { continue; } - if (i2c_scan_bus(mux->channel[i].bus, address, broadcast, + if (i2c_scan_bus(mux->bus[i], address, broadcast, current_devs)) { if (!broadcast) { return true; @@ -125,9 +107,9 @@ static void pca954x_enable_channel(Pca954xState *s, uint8_t enable_mask) */ for (i = 0; i < mc->nchans; i++) { if (enable_mask & (1 << i)) { - s->channel[i].enabled = true; + s->enabled[i] = true; } else { - s->channel[i].enabled = false; + s->enabled[i] = false; } } } @@ -184,23 +166,7 @@ I2CBus *pca954x_i2c_get_bus(I2CSlave *mux, uint8_t channel) Pca954xState *pca954x = PCA954X(mux); g_assert(channel < pc->nchans); - return I2C_BUS(qdev_get_child_bus(DEVICE(&pca954x->channel[channel]), - "i2c-bus")); -} - -static void pca954x_channel_init(Object *obj) -{ - Pca954xChannel *s = PCA954X_CHANNEL(obj); - s->bus = i2c_init_bus(DEVICE(s), "i2c-bus"); - - /* Start all channels as disabled. */ - s->enabled = false; -} - -static void pca954x_channel_class_init(ObjectClass *klass, void *data) -{ - DeviceClass *dc = DEVICE_CLASS(klass); - dc->desc = "Pca954x Channel"; + return pca954x->bus[channel]; } static void pca9546_class_init(ObjectClass *klass, void *data) @@ -215,28 +181,17 @@ static void pca9548_class_init(ObjectClass *klass, void *data) s->nchans = PCA9548_CHANNEL_COUNT; } -static void pca954x_realize(DeviceState *dev, Error **errp) -{ - Pca954xState *s = PCA954X(dev); - Pca954xClass *c = PCA954X_GET_CLASS(s); - int i; - - /* SMBus modules. Cannot fail. */ - for (i = 0; i < c->nchans; i++) { - sysbus_realize(SYS_BUS_DEVICE(&s->channel[i]), &error_abort); - } -} - static void pca954x_init(Object *obj) { Pca954xState *s = PCA954X(obj); Pca954xClass *c = PCA954X_GET_CLASS(obj); int i; - /* Only initialize the children we expect. */ + /* SMBus modules. Cannot fail. */ for (i = 0; i < c->nchans; i++) { - object_initialize_child(obj, "channel[*]", &s->channel[i], - TYPE_PCA954X_CHANNEL); + /* start all channels as disabled. */ + s->enabled[i] = false; + s->bus[i] = i2c_init_bus(DEVICE(s), "channel[*]"); } } @@ -252,7 +207,6 @@ static void pca954x_class_init(ObjectClass *klass, void *data) rc->phases.enter = pca954x_enter_reset; dc->desc = "Pca954x i2c-mux"; - dc->realize = pca954x_realize; k->write_data = pca954x_write_data; k->receive_byte = pca954x_read_byte; @@ -278,13 +232,6 @@ static const TypeInfo pca954x_info[] = { .parent = TYPE_PCA954X, .class_init = pca9548_class_init, }, - { - .name = TYPE_PCA954X_CHANNEL, - .parent = TYPE_SYS_BUS_DEVICE, - .class_init = pca954x_channel_class_init, - .instance_size = sizeof(Pca954xChannel), - .instance_init = pca954x_channel_init, - } }; DEFINE_TYPES(pca954x_info)