From patchwork Mon Jul 29 14:20:53 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Herve Codina X-Patchwork-Id: 13745059 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 69D1EC3DA61 for ; Mon, 29 Jul 2024 14:32:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=QMfEiRmSRkX/pBoCz01B9PXrobVJrcp4KetogWxNR/M=; b=ubNqhveMuIlF925dN0ldicniOI Bhbiz8VQW0IJHLKV/+nlEuOXB32c1ofDXz4mT8h1E8GtaUchCXY09BsC/PsjwK7/LJJZt22yi1+MW lh8emwOz9G0//8ABMcyxth5N2oSYbjJgg4YmXJF3DKFJqxWnyfzYN98VXTA9imxgxcB8LWXxZuwcu +hlNXOEzqc/zk+bpyCiIldjlKAvz63C3G7c08VCp7Fo7OtVbNgbQlAGJXq9ie1Y6zMcrgBJoNHBKp Dz2iHBnfit2Mj24DntdSnmAwh6nxI3T5Kb9Sb7mgy1AI9ikxYNehP7HVLOSahIleBnyyNXjDoVpba 18lOhuyw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1sYRQ5-0000000BcWn-3Nab; Mon, 29 Jul 2024 14:32:13 +0000 Received: from relay1-d.mail.gandi.net ([2001:4b98:dc4:8::221]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1sYRFl-0000000BXlt-4Afv for linux-arm-kernel@lists.infradead.org; Mon, 29 Jul 2024 14:21:35 +0000 Received: by mail.gandi.net (Postfix) with ESMTPA id 0612E240006; Mon, 29 Jul 2024 14:21:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1722262892; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=QMfEiRmSRkX/pBoCz01B9PXrobVJrcp4KetogWxNR/M=; b=ZBUUtOFQ8SFGjFY3X2fnmSHouUeMuj/jwtcKOIHojHN/ttdqMIMat1BGBIKsZW9wkhwU4V pIXJaTatfsWmYpaxjgOTrDdBggksFCafHPOqo2JokVRJEneOYTEmkH0fzYe6iRlgvjgVNB 6sjpadb/6YW9p5h9HlkTbTrQSiVv3pZSM6C0z+HwrqctnPADj50QkUmxZY++/QSf68QWRU 794DnmUXs0OiVZVnRIpQBFvEwHYL7KFXLHPRaOdf2Snt6AsCRvCpcR+B6N66jw8Hso7Au2 wPGMlwT5RtVPZ/9rD8Rz8HQNfTn9b2odwHWfQ7K8PbMc5yU9g2I3jNVc/F+PJw== From: Herve Codina To: Herve Codina , Christophe Leroy , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Qiang Zhao , Li Yang , Mark Brown Cc: linuxppc-dev@lists.ozlabs.org, linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Thomas Petazzoni Subject: [PATCH v1 24/36] soc: fsl: cpm1: qmc: Introduce qmc_data structure Date: Mon, 29 Jul 2024 16:20:53 +0200 Message-ID: <20240729142107.104574-25-herve.codina@bootlin.com> X-Mailer: git-send-email 2.45.0 In-Reply-To: <20240729142107.104574-1-herve.codina@bootlin.com> References: <20240729142107.104574-1-herve.codina@bootlin.com> MIME-Version: 1.0 X-GND-Sasl: herve.codina@bootlin.com X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240729_072134_381871_23BB1D55 X-CRM114-Status: GOOD ( 16.55 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Current code handles CPM1 version of QMC. Some hardcoded values are used several times to initialize the QMC state machine. In the QUICC Engine (QE) version of QMC, these values are different. In order to prepare the support for the QE version of QMC and avoid the copy of the hardcoded values, introduce the qmc_data structure to define these version specific values. Signed-off-by: Herve Codina --- drivers/soc/fsl/qe/qmc.c | 69 ++++++++++++++++++++++++++-------------- 1 file changed, 46 insertions(+), 23 deletions(-) diff --git a/drivers/soc/fsl/qe/qmc.c b/drivers/soc/fsl/qe/qmc.c index 3736a8e4575e..85fc86f91806 100644 --- a/drivers/soc/fsl/qe/qmc.c +++ b/drivers/soc/fsl/qe/qmc.c @@ -215,8 +215,17 @@ struct qmc_chan { bool is_rx_stopped; }; +struct qmc_data { + u32 tstate; /* Initial TSTATE value */ + u32 rstate; /* Initial RSTATE value */ + u32 zistate; /* Initial ZISTATE value */ + u32 zdstate_hdlc; /* Initial ZDSTATE value (HDLC mode) */ + u32 zdstate_transp; /* Initial ZDSTATE value (Transparent mode) */ +}; + struct qmc { struct device *dev; + const struct qmc_data *data; struct tsa_serial *tsa_serial; void __iomem *scc_regs; void __iomem *scc_pram; @@ -543,11 +552,11 @@ int qmc_chan_read_submit(struct qmc_chan *chan, dma_addr_t addr, size_t length, /* Restart receiver if needed */ if (chan->is_rx_halted && !chan->is_rx_stopped) { /* Restart receiver */ - if (chan->mode == QMC_TRANSPARENT) - qmc_write32(chan->s_param + QMC_SPE_ZDSTATE, 0x18000080); - else - qmc_write32(chan->s_param + QMC_SPE_ZDSTATE, 0x00000080); - qmc_write32(chan->s_param + QMC_SPE_RSTATE, 0x31000000); + qmc_write32(chan->s_param + QMC_SPE_ZDSTATE, + chan->mode == QMC_TRANSPARENT ? + chan->qmc->data->zdstate_transp : + chan->qmc->data->zdstate_hdlc); + qmc_write32(chan->s_param + QMC_SPE_RSTATE, chan->qmc->data->rstate); chan->is_rx_halted = false; } chan->rx_pending++; @@ -971,11 +980,11 @@ static int qmc_chan_start_rx(struct qmc_chan *chan) } /* Restart the receiver */ - if (chan->mode == QMC_TRANSPARENT) - qmc_write32(chan->s_param + QMC_SPE_ZDSTATE, 0x18000080); - else - qmc_write32(chan->s_param + QMC_SPE_ZDSTATE, 0x00000080); - qmc_write32(chan->s_param + QMC_SPE_RSTATE, 0x31000000); + qmc_write32(chan->s_param + QMC_SPE_ZDSTATE, + chan->mode == QMC_TRANSPARENT ? + chan->qmc->data->zdstate_transp : + chan->qmc->data->zdstate_hdlc); + qmc_write32(chan->s_param + QMC_SPE_RSTATE, chan->qmc->data->rstate); chan->is_rx_halted = false; chan->is_rx_stopped = false; @@ -1121,8 +1130,8 @@ static void qmc_chan_reset_tx(struct qmc_chan *chan) qmc_read16(chan->s_param + QMC_SPE_TBASE)); /* Reset TSTATE and ZISTATE to their initial value */ - qmc_write32(chan->s_param + QMC_SPE_TSTATE, 0x30000000); - qmc_write32(chan->s_param + QMC_SPE_ZISTATE, 0x00000100); + qmc_write32(chan->s_param + QMC_SPE_TSTATE, chan->qmc->data->tstate); + qmc_write32(chan->s_param + QMC_SPE_ZISTATE, chan->qmc->data->zistate); spin_unlock_irqrestore(&chan->tx_lock, flags); } @@ -1393,11 +1402,11 @@ static int qmc_setup_chan(struct qmc *qmc, struct qmc_chan *chan) val = ((chan->id * (QMC_NB_TXBDS + QMC_NB_RXBDS)) + QMC_NB_TXBDS) * sizeof(cbd_t); qmc_write16(chan->s_param + QMC_SPE_RBASE, val); qmc_write16(chan->s_param + QMC_SPE_RBPTR, val); - qmc_write32(chan->s_param + QMC_SPE_TSTATE, 0x30000000); - qmc_write32(chan->s_param + QMC_SPE_RSTATE, 0x31000000); - qmc_write32(chan->s_param + QMC_SPE_ZISTATE, 0x00000100); + qmc_write32(chan->s_param + QMC_SPE_TSTATE, chan->qmc->data->tstate); + qmc_write32(chan->s_param + QMC_SPE_RSTATE, chan->qmc->data->rstate); + qmc_write32(chan->s_param + QMC_SPE_ZISTATE, chan->qmc->data->zistate); if (chan->mode == QMC_TRANSPARENT) { - qmc_write32(chan->s_param + QMC_SPE_ZDSTATE, 0x18000080); + qmc_write32(chan->s_param + QMC_SPE_ZDSTATE, chan->qmc->data->zdstate_transp); qmc_write16(chan->s_param + QMC_SPE_TMRBLR, 60); val = QMC_SPE_CHAMR_MODE_TRANSP; if (chan->is_reverse_data) @@ -1407,7 +1416,7 @@ static int qmc_setup_chan(struct qmc *qmc, struct qmc_chan *chan) if (ret) return ret; } else { - qmc_write32(chan->s_param + QMC_SPE_ZDSTATE, 0x00000080); + qmc_write32(chan->s_param + QMC_SPE_ZDSTATE, chan->qmc->data->zdstate_hdlc); qmc_write16(chan->s_param + QMC_SPE_MFLR, 60); qmc_write16(chan->s_param + QMC_SPE_CHAMR, QMC_SPE_CHAMR_MODE_HDLC | QMC_SPE_CHAMR_HDLC_IDLM); @@ -1535,11 +1544,12 @@ static void qmc_irq_gint(struct qmc *qmc) /* Restart the receiver if needed */ spin_lock_irqsave(&chan->rx_lock, flags); if (chan->rx_pending && !chan->is_rx_stopped) { - if (chan->mode == QMC_TRANSPARENT) - qmc_write32(chan->s_param + QMC_SPE_ZDSTATE, 0x18000080); - else - qmc_write32(chan->s_param + QMC_SPE_ZDSTATE, 0x00000080); - qmc_write32(chan->s_param + QMC_SPE_RSTATE, 0x31000000); + qmc_write32(chan->s_param + QMC_SPE_ZDSTATE, + chan->mode == QMC_TRANSPARENT ? + chan->qmc->data->zdstate_transp : + chan->qmc->data->zdstate_hdlc); + qmc_write32(chan->s_param + QMC_SPE_RSTATE, + chan->qmc->data->rstate); chan->is_rx_halted = false; } else { chan->is_rx_halted = true; @@ -1597,6 +1607,11 @@ static int qmc_probe(struct platform_device *pdev) return -ENOMEM; qmc->dev = &pdev->dev; + qmc->data = of_device_get_match_data(&pdev->dev); + if (!qmc->data) { + dev_err(qmc->dev, "Missing match data\n"); + return -EINVAL; + } INIT_LIST_HEAD(&qmc->chan_head); qmc->scc_regs = devm_platform_ioremap_resource_byname(pdev, "scc_regs"); @@ -1752,8 +1767,16 @@ static void qmc_remove(struct platform_device *pdev) tsa_serial_disconnect(qmc->tsa_serial); } +static const struct qmc_data qmc_data_cpm1 = { + .tstate = 0x30000000, + .rstate = 0x31000000, + .zistate = 0x00000100, + .zdstate_hdlc = 0x00000080, + .zdstate_transp = 0x18000080, +}; + static const struct of_device_id qmc_id_table[] = { - { .compatible = "fsl,cpm1-scc-qmc" }, + { .compatible = "fsl,cpm1-scc-qmc", .data = &qmc_data_cpm1 }, {} /* sentinel */ }; MODULE_DEVICE_TABLE(of, qmc_id_table);