From patchwork Fri Sep 9 09:14:30 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Baryshkov X-Patchwork-Id: 604272 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7B8CEC6FA99 for ; Fri, 9 Sep 2022 09:14:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232117AbiIIJOu (ORCPT ); Fri, 9 Sep 2022 05:14:50 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57596 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232123AbiIIJOr (ORCPT ); Fri, 9 Sep 2022 05:14:47 -0400 Received: from mail-lf1-x136.google.com (mail-lf1-x136.google.com [IPv6:2a00:1450:4864:20::136]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EB7FCA1B4 for ; Fri, 9 Sep 2022 02:14:42 -0700 (PDT) Received: by mail-lf1-x136.google.com with SMTP id f14so673142lfg.5 for ; Fri, 09 Sep 2022 02:14:42 -0700 (PDT) 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; bh=BG/TDrsuuuP6fpTPNslkj+bSpnJP0yproc+vCPdzyEE=; b=rK3jD3C7Bl6R85J/1ihgcwK4hC+M9srfdz34IbLOA8F+rbwg5PlSnI1iaruhlxUI2I Q3cjcqnzTf3ViB7jX+cP0D/euSCmIems85x/P7c/guPp+s9rC1gUH/Sv2qbYFEFjepgO lXvV1LdVV6zqsrLnW1DVjSr8CtpGGSWF4gh42kmoRhuBRVOvsJu4vYcP5vj7OZWANMZw et4ARbtiVNfYqD4e7J7SCNBe5zO6S1TBpdec2K+mNv15vNkN/bbrpKJMbiJ65XXM9Fry wXvZRZvEGbhxHjXSeA9GTB2IeBytICR6hRyUe5KAM3uDaBK3GZFejedZ0spCM71XtOwL KTSg== 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; bh=BG/TDrsuuuP6fpTPNslkj+bSpnJP0yproc+vCPdzyEE=; b=1GcKU05qiSF15U9pp+5II9IhoWz1tP52JkXA1GRcVFCgMG82hkMkh0Y9Hvpp0Hy82p DoC2n2om9WL1uDWVPluPxxlCt/GnPuPgsbjWYz/Y0QtF2EIBi92IsFnM+GVLGc/8FXQ+ Eah4mPsvUYS++1q0tZjLCLXJIBTuF13xKkjvde0HMUhl9BzVWzGR9ArLT3wqenLFmo8R oBLFw6XBwbBw/AeAgO5FrvjJbgB2vrTEbkiM5P8XYxoxFh/g1s137RLamBZ3q6JXfbtj E11TWKT3ocpvkkXpcGcXA9xqsD5U2COzPTI5z3f3Y+zlCSNMFcpLwzJxs0kwkwazyZcm 5gmw== X-Gm-Message-State: ACgBeo08HYV2OmTcJTv7rjNLPJy6My4D88+qj6lquiHrgW21j1VzBLkA wLBpkJreihDKlNtKu27bcUDjL2jWS1TKEg== X-Google-Smtp-Source: AA6agR5HQg+Un5RLLGNR7B+3/W+q+RGySeJeTdGJ9BqHia5jtWkKVN6Y9ntbpFMa/p0DMCd0lr404g== X-Received: by 2002:a19:ac45:0:b0:494:9978:178a with SMTP id r5-20020a19ac45000000b004949978178amr3872345lfc.505.1662714880682; Fri, 09 Sep 2022 02:14:40 -0700 (PDT) Received: from eriador.lan ([37.153.55.125]) by smtp.gmail.com with ESMTPSA id z26-20020a2e4c1a000000b0026acbb6ed1asm201615lja.66.2022.09.09.02.14.39 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 09 Sep 2022 02:14:40 -0700 (PDT) From: Dmitry Baryshkov To: Andy Gross , Bjorn Andersson , Konrad Dybcio , Rob Herring , Jingoo Han , Gustavo Pimentel , Lorenzo Pieralisi , =?utf-8?q?Krzysztof_Wilczy?= =?utf-8?q?=C5=84ski?= , Bjorn Helgaas , Vinod Koul , Kishon Vijay Abraham I Cc: Philipp Zabel , Johan Hovold , linux-arm-msm@vger.kernel.org, linux-pci@vger.kernel.org, linux-phy@lists.infradead.org Subject: [PATCH v3 6/9] phy: qcom-qmp-pcie: support separate tables for EP mode Date: Fri, 9 Sep 2022 12:14:30 +0300 Message-Id: <20220909091433.3715981-7-dmitry.baryshkov@linaro.org> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220909091433.3715981-1-dmitry.baryshkov@linaro.org> References: <20220909091433.3715981-1-dmitry.baryshkov@linaro.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org The PCIe QMP PHY requires different programming sequences when being used for the RC (Root Complex) or for the EP (End Point) modes. Allow selecting the submode and thus selecting a set of PHY programming tables. Since the RC and EP modes share common some common init sequence, the common sequence is kept in the main table and the sequence differences are pushed to the secondary tables. Signed-off-by: Dmitry Baryshkov --- drivers/phy/qualcomm/phy-qcom-qmp-pcie.c | 54 ++++++++++++++++++++---- 1 file changed, 46 insertions(+), 8 deletions(-) diff --git a/drivers/phy/qualcomm/phy-qcom-qmp-pcie.c b/drivers/phy/qualcomm/phy-qcom-qmp-pcie.c index d115f7ef3901..d945e8c61811 100644 --- a/drivers/phy/qualcomm/phy-qcom-qmp-pcie.c +++ b/drivers/phy/qualcomm/phy-qcom-qmp-pcie.c @@ -1369,10 +1369,14 @@ struct qmp_phy_cfg { /* Main init sequence for PHY blocks - serdes, tx, rx, pcs */ struct qmp_phy_cfg_tables main; /* - * Additional init sequence for PHY blocks, providing additional - * register programming. Unless required it can be left omitted. + * Additional init sequences for PHY blocks, providing additional + * register programming. They are used for providing separate sequences + * for the Root Complex and for the End Point usecases. + * + * If EP mode is not supported, both tables can be left empty. */ - struct qmp_phy_cfg_tables *secondary; + struct qmp_phy_cfg_tables *secondary_rc; /* for the RC only */ + struct qmp_phy_cfg_tables *secondary_ep; /* for the EP only */ /* clock ids to be requested */ const char * const *clk_list; @@ -1422,6 +1426,7 @@ struct qmp_phy_cfg { * @index: lane index * @qmp: QMP phy to which this lane belongs * @mode: current PHY mode + * @secondary: currently selected PHY secondary init table set */ struct qmp_phy { struct phy *phy; @@ -1434,6 +1439,7 @@ struct qmp_phy { void __iomem *rx2; void __iomem *pcs_misc; struct clk *pipe_clk; + const struct qmp_phy_cfg_tables *secondary; unsigned int index; struct qcom_qmp *qmp; enum phy_mode mode; @@ -1687,7 +1693,15 @@ static const struct qmp_phy_cfg sm8250_qmp_gen3x1_pciephy_cfg = { .pcs_misc_tbl = sm8250_qmp_pcie_pcs_misc_tbl, .pcs_misc_tbl_num = ARRAY_SIZE(sm8250_qmp_pcie_pcs_misc_tbl), }, - .secondary = &(struct qmp_phy_cfg_tables) { + /* + * For sm8250 the split between the primary and secondary_rc tables is + * historical, it reflects the programming sequence common to all PCIe + * PHYs on this platform and a sequence required for this particular + * PHY type. If EP support for sm8250 is required, the + * primary/secondary_rc split is to be reconsidered and adjusted + * according to EP programming sequence. + */ + .secondary_rc = &(struct qmp_phy_cfg_tables) { .serdes_tbl = sm8250_qmp_gen3x1_pcie_serdes_tbl, .serdes_tbl_num = ARRAY_SIZE(sm8250_qmp_gen3x1_pcie_serdes_tbl), .rx_tbl = sm8250_qmp_gen3x1_pcie_rx_tbl, @@ -1730,7 +1744,15 @@ static const struct qmp_phy_cfg sm8250_qmp_gen3x2_pciephy_cfg = { .pcs_misc_tbl = sm8250_qmp_pcie_pcs_misc_tbl, .pcs_misc_tbl_num = ARRAY_SIZE(sm8250_qmp_pcie_pcs_misc_tbl), }, - .secondary = &(struct qmp_phy_cfg_tables) { + /* + * For sm8250 the split between the primary and secondary_rc tables is + * historical, it reflects the programming sequence common to all PCIe + * PHYs on this platform and a sequence required for this particular + * PHY type. If EP support for sm8250 is required, the + * primary/secondary_rc split is to be reconsidered and adjusted + * according to EP programming sequence. + */ + .secondary_rc = &(struct qmp_phy_cfg_tables) { .tx_tbl = sm8250_qmp_gen3x2_pcie_tx_tbl, .tx_tbl_num = ARRAY_SIZE(sm8250_qmp_gen3x2_pcie_tx_tbl), .rx_tbl = sm8250_qmp_gen3x2_pcie_rx_tbl, @@ -2085,8 +2107,12 @@ static int qcom_qmp_phy_pcie_power_on(struct phy *phy) unsigned int mask, val, ready; int ret; + /* Default to RC mode if the mode was not selected using phy_set_mode_ext() */ + if (!qphy->secondary) + qphy->secondary = cfg->secondary_rc; + qcom_qmp_phy_pcie_serdes_init(qphy, &cfg->main); - qcom_qmp_phy_pcie_serdes_init(qphy, cfg->secondary); + qcom_qmp_phy_pcie_serdes_init(qphy, qphy->secondary); ret = clk_prepare_enable(qphy->pipe_clk); if (ret) { @@ -2096,10 +2122,10 @@ static int qcom_qmp_phy_pcie_power_on(struct phy *phy) /* Tx, Rx, and PCS configurations */ qcom_qmp_phy_pcie_lanes_init(qphy, &cfg->main); - qcom_qmp_phy_pcie_lanes_init(qphy, cfg->secondary); + qcom_qmp_phy_pcie_lanes_init(qphy, qphy->secondary); qcom_qmp_phy_pcie_pcs_init(qphy, &cfg->main); - qcom_qmp_phy_pcie_pcs_init(qphy, cfg->secondary); + qcom_qmp_phy_pcie_pcs_init(qphy, qphy->secondary); /* * Pull out PHY from POWER DOWN state. @@ -2201,6 +2227,18 @@ static int qcom_qmp_phy_pcie_set_mode(struct phy *phy, qphy->mode = mode; + switch (submode) { + case PHY_SUBMODE_PCIE_RC: + qphy->secondary = qphy->cfg->secondary_rc; + break; + case PHY_SUBMODE_PCIE_EP: + qphy->secondary = qphy->cfg->secondary_ep; + break; + default: + dev_err(&phy->dev, "Unuspported submode %d\n", submode); + return -EINVAL; + } + return 0; }