From patchwork Tue Jul 9 22:12:07 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Witold Sadowski X-Patchwork-Id: 812271 Received: from mx0b-0016f401.pphosted.com (mx0b-0016f401.pphosted.com [67.231.156.173]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D3953185636; Tue, 9 Jul 2024 22:12:22 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=67.231.156.173 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1720563145; cv=none; b=sm92bkt2mGwq7SFUbrpBmdyAZdWugbLHR77fpZpXj7zDKOj9eEfUQOWU5Za6bnOVP7FumzHRpNPLvr033raujCFwMFvTiS3NxIB+OwAwlRhBx0UrmPqJ7n/HlvRQ2lV0XBYNdg4jlEzXHYwosqVSUP7KMyOeVMmaJtTDpvc3siY= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1720563145; c=relaxed/simple; bh=K6el2r3lK9LhYDQbphXj7qixWLpe9gt1/38m8L7E3X4=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=hrMdAnVrtC+DGKlwb2rOv+yXgTYGaBaTmu/aetqMkYG9a9y95vH9pZRexj6ZcFNdkt4ftXuollTTFDEneqqYud7d+zgMv60g0BqJGiJoqM3lmfJA/z0NufJq6UARgdPsn9WOfHq3QHcJRwTn8IWo3ZoQlnlu8mrTIttst10oB8I= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=marvell.com; spf=pass smtp.mailfrom=marvell.com; dkim=pass (2048-bit key) header.d=marvell.com header.i=@marvell.com header.b=J+q4AlDl; arc=none smtp.client-ip=67.231.156.173 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=marvell.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=marvell.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=marvell.com header.i=@marvell.com header.b="J+q4AlDl" Received: from pps.filterd (m0045851.ppops.net [127.0.0.1]) by mx0b-0016f401.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 469KH3Lm020309; Tue, 9 Jul 2024 15:12:17 -0700 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=marvell.com; h= cc:content-transfer-encoding:content-type:date:from:in-reply-to :message-id:mime-version:references:subject:to; s=pfpt0220; bh=p Rf6L3p+XvPwgIDOe8BlAnkoPmI3hxz3UOVHayaabP0=; b=J+q4AlDlDCqs3spkj Rd4jBTCYxPLMp5i/R/H4TYs4aQSjhFNgb5PaeBGYr5WoehjHHLfSm6PVrttvlHrM NioS7XBRA/j4uqKdlv1WdJrmll2yICLz+wS+smWwBiOcxyNwvrRHtqxcDQx6/o+d eK1Amlm/nSSWEDr6hchNiJAWETmRVJh6EEltxo5oXFoQrXl5XALE1ewCtkA1jw/s 8KLLVkALs+Ie8zfM1ZasjL7C5zNba7vYA1GmBvQBoGd2gI3kqr/mGtj08u/1NmYu qVD1uhi4JYgAcOTSEzja9WRngUvGem6nXZYWLpiletx5wqKEVP/etNfm1+8V8W83 aBCCQ== Received: from dc6wp-exch02.marvell.com ([4.21.29.225]) by mx0b-0016f401.pphosted.com (PPS) with ESMTPS id 408ntymyxg-5 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 09 Jul 2024 15:12:17 -0700 (PDT) Received: from DC6WP-EXCH02.marvell.com (10.76.176.209) by DC6WP-EXCH02.marvell.com (10.76.176.209) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.4; Tue, 9 Jul 2024 15:12:15 -0700 Received: from maili.marvell.com (10.69.176.80) by DC6WP-EXCH02.marvell.com (10.76.176.209) with Microsoft SMTP Server id 15.2.1544.4 via Frontend Transport; Tue, 9 Jul 2024 15:12:15 -0700 Received: from Dell2s-9.sclab.marvell.com (unknown [10.110.150.250]) by maili.marvell.com (Postfix) with ESMTP id 895553F707B; Tue, 9 Jul 2024 15:12:15 -0700 (PDT) From: Witold Sadowski To: , , CC: , , , , , Witold Sadowski Subject: [PATCH v10 5/9] spi: cadence: Add Marvell xSPI interrupt changes Date: Tue, 9 Jul 2024 15:12:07 -0700 Message-ID: <20240709221211.2130456-6-wsadowski@marvell.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240709221211.2130456-1-wsadowski@marvell.com> References: <20240709221211.2130456-1-wsadowski@marvell.com> Precedence: bulk X-Mailing-List: linux-spi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Proofpoint-ORIG-GUID: ymT6WOH5uhbjfaM_K7bwojkkgy4jxTLS X-Proofpoint-GUID: ymT6WOH5uhbjfaM_K7bwojkkgy4jxTLS X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1039,Hydra:6.0.680,FMLib:17.12.28.16 definitions=2024-07-09_10,2024-07-09_01,2024-05-17_01 It is possible that before enabling interrupt, interrupt bit will be set. It might cause improper IRQ handler behaviour. To fix it, clear interrupt bit before enabling interrupts. That behaviour is specific to Marvell xSPI implementation. In addition in Marvell xSPI interrupt must be cleared in two places - xSPI itself, and Marvell overlay. Signed-off-by: Witold Sadowski --- drivers/spi/spi-cadence-xspi.c | 28 ++++++++++++++++++++++++---- 1 file changed, 24 insertions(+), 4 deletions(-) diff --git a/drivers/spi/spi-cadence-xspi.c b/drivers/spi/spi-cadence-xspi.c index 5952ca4593bb..cada53cbf5d5 100644 --- a/drivers/spi/spi-cadence-xspi.c +++ b/drivers/spi/spi-cadence-xspi.c @@ -311,6 +311,7 @@ struct cdns_xspi_dev { const struct cdns_xspi_driver_data *driver_data; void (*sdma_handler)(struct cdns_xspi_dev *cdns_xspi); + void (*set_interrupts_handler)(struct cdns_xspi_dev *cdns_xspi, bool enabled); }; static void cdns_xspi_reset_dll(struct cdns_xspi_dev *cdns_xspi) @@ -472,6 +473,23 @@ static void cdns_xspi_set_interrupts(struct cdns_xspi_dev *cdns_xspi, writel(intr_enable, cdns_xspi->iobase + CDNS_XSPI_INTR_ENABLE_REG); } +static void marvell_xspi_set_interrupts(struct cdns_xspi_dev *cdns_xspi, + bool enabled) +{ + u32 intr_enable; + u32 irq_status; + + irq_status = readl(cdns_xspi->iobase + CDNS_XSPI_INTR_STATUS_REG); + writel(irq_status, cdns_xspi->iobase + CDNS_XSPI_INTR_STATUS_REG); + + intr_enable = readl(cdns_xspi->iobase + CDNS_XSPI_INTR_ENABLE_REG); + if (enabled) + intr_enable |= CDNS_XSPI_INTR_MASK; + else + intr_enable &= ~CDNS_XSPI_INTR_MASK; + writel(intr_enable, cdns_xspi->iobase + CDNS_XSPI_INTR_ENABLE_REG); +} + static int cdns_xspi_controller_init(struct cdns_xspi_dev *cdns_xspi) { u32 ctrl_ver; @@ -489,7 +507,7 @@ static int cdns_xspi_controller_init(struct cdns_xspi_dev *cdns_xspi) ctrl_features = readl(cdns_xspi->iobase + CDNS_XSPI_CTRL_FEATURES_REG); cdns_xspi->hw_num_banks = FIELD_GET(CDNS_XSPI_NUM_BANKS, ctrl_features); - cdns_xspi_set_interrupts(cdns_xspi, false); + cdns_xspi->set_interrupts_handler(cdns_xspi, false); return 0; } @@ -594,7 +612,7 @@ static int cdns_xspi_send_stig_command(struct cdns_xspi_dev *cdns_xspi, writel(FIELD_PREP(CDNS_XSPI_CTRL_WORK_MODE, CDNS_XSPI_WORK_MODE_STIG), cdns_xspi->iobase + CDNS_XSPI_CTRL_CONFIG_REG); - cdns_xspi_set_interrupts(cdns_xspi, true); + cdns_xspi->set_interrupts_handler(cdns_xspi, true); cdns_xspi->sdma_error = false; memset(cmd_regs, 0, sizeof(cmd_regs)); @@ -626,14 +644,14 @@ static int cdns_xspi_send_stig_command(struct cdns_xspi_dev *cdns_xspi, wait_for_completion(&cdns_xspi->sdma_complete); if (cdns_xspi->sdma_error) { - cdns_xspi_set_interrupts(cdns_xspi, false); + cdns_xspi->set_interrupts_handler(cdns_xspi, false); return -EIO; } cdns_xspi->sdma_handler(cdns_xspi); } wait_for_completion(&cdns_xspi->cmd_complete); - cdns_xspi_set_interrupts(cdns_xspi, false); + cdns_xspi->set_interrupts_handler(cdns_xspi, false); cmd_status = cdns_xspi_check_command_status(cdns_xspi); if (cmd_status) @@ -802,9 +820,11 @@ static int cdns_xspi_probe(struct platform_device *pdev) if (cdns_xspi->driver_data->mrvl_hw_overlay) { host->mem_ops = &marvell_xspi_mem_ops; cdns_xspi->sdma_handler = &marvell_xspi_sdma_handle; + cdns_xspi->set_interrupts_handler = &marvell_xspi_set_interrupts; } else { host->mem_ops = &cadence_xspi_mem_ops; cdns_xspi->sdma_handler = &cdns_xspi_sdma_handle; + cdns_xspi->set_interrupts_handler = &cdns_xspi_set_interrupts; } host->dev.of_node = pdev->dev.of_node; host->bus_num = -1;