From patchwork Mon Feb 6 11:38:10 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Walker Chen X-Patchwork-Id: 13129716 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 40E0EC636D6 for ; Mon, 6 Feb 2023 11:39:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:CC:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=s0bVM7SA9aKL3wMsU0Eh/Leb5UJfTZc/K2WAWh1aCck=; b=GllsqtM+z1U7lD TIrCmm+cP9WQLYhFkszRnY2DgF2ZZxTZSmnCI3flwpYDFXn6fSxjuPqffbMWFC7jKvN0blMVExse1 Ypl4kJ0UBsaFCMXThra9uQsDeDpKpS4RHW7oUOpL+imDv7NbY+YfLuUWxREFzUxSwYVzUyl5fkYQk LRKizW1AoacNUvDTRQbNXK2whuDD5To6oScvi5DHfwjzm48GJMlpQiFw6nVWx/gtwEYUMRf9SGNXP vjArfCskAn024Xo6Az9wIP5EdadOwlJACx2NOUgklDVqeONy9x5duiAkj+15jqkvDfFtkAK1WvfaX y0qkWZtEsEMZJzjNfsEQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1pOzq1-008K7O-N0; Mon, 06 Feb 2023 11:39:09 +0000 Received: from fd01.gateway.ufhost.com ([61.152.239.71]) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1pOzpx-008K16-Lf for linux-riscv@lists.infradead.org; Mon, 06 Feb 2023 11:39:07 +0000 Received: from EXMBX166.cuchost.com (unknown [175.102.18.54]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "EXMBX166", Issuer "EXMBX166" (not verified)) by fd01.gateway.ufhost.com (Postfix) with ESMTP id 6CA8324E13A; Mon, 6 Feb 2023 19:38:24 +0800 (CST) Received: from EXMBX168.cuchost.com (172.16.6.78) by EXMBX166.cuchost.com (172.16.6.76) with Microsoft SMTP Server (TLS) id 15.0.1497.42; Mon, 6 Feb 2023 19:38:24 +0800 Received: from localhost.localdomain (183.27.96.33) by EXMBX168.cuchost.com (172.16.6.78) with Microsoft SMTP Server (TLS) id 15.0.1497.42; Mon, 6 Feb 2023 19:38:23 +0800 From: Walker Chen To: , , CC: Eugeniy Paltsev , Vinod Koul , Rob Herring , Krzysztof Kozlowski , Conor Dooley , "Palmer Dabbelt" , Emil Renner Berthing , "Walker Chen" , Subject: [PATCH v1 2/3] dma: dw-axi-dmac: Add support for StarFive DMA Date: Mon, 6 Feb 2023 19:38:10 +0800 Message-ID: <20230206113811.23133-3-walker.chen@starfivetech.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20230206113811.23133-1-walker.chen@starfivetech.com> References: <20230206113811.23133-1-walker.chen@starfivetech.com> MIME-Version: 1.0 X-Originating-IP: [183.27.96.33] X-ClientProxiedBy: EXCAS066.cuchost.com (172.16.6.26) To EXMBX168.cuchost.com (172.16.6.78) X-YovoleRuleAgent: yovoleflag X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230206_033906_086496_0057159D X-CRM114-Status: GOOD ( 19.29 ) X-BeenThere: linux-riscv@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-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org Adding DMA reset operation in device probe, and using different registers according to the hardware handshake number. Signed-off-by: Walker Chen --- .../dma/dw-axi-dmac/dw-axi-dmac-platform.c | 25 ++++++++++++++++--- drivers/dma/dw-axi-dmac/dw-axi-dmac.h | 3 +++ 2 files changed, 24 insertions(+), 4 deletions(-) diff --git a/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c b/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c index a183d93bd7e2..3581810033d2 100644 --- a/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c +++ b/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c @@ -25,6 +25,7 @@ #include #include #include +#include #include #include @@ -86,7 +87,8 @@ static inline void axi_chan_config_write(struct axi_dma_chan *chan, cfg_lo = (config->dst_multblk_type << CH_CFG_L_DST_MULTBLK_TYPE_POS | config->src_multblk_type << CH_CFG_L_SRC_MULTBLK_TYPE_POS); - if (chan->chip->dw->hdata->reg_map_8_channels) { + if (chan->chip->dw->hdata->reg_map_8_channels && + !chan->chip->dw->hdata->use_cfg2) { cfg_hi = config->tt_fc << CH_CFG_H_TT_FC_POS | config->hs_sel_src << CH_CFG_H_HS_SEL_SRC_POS | config->hs_sel_dst << CH_CFG_H_HS_SEL_DST_POS | @@ -541,8 +543,6 @@ static void dw_axi_dma_set_hw_channel(struct axi_dma_chan *chan, bool set) (chan->id * DMA_APB_HS_SEL_BIT_SIZE)); reg_value |= (val << (chan->id * DMA_APB_HS_SEL_BIT_SIZE)); lo_hi_writeq(reg_value, chip->apb_regs + DMAC_APB_HW_HS_SEL_0); - - return; } /* @@ -1136,7 +1136,7 @@ static int dma_chan_terminate_all(struct dma_chan *dchan) axi_chan_disable(chan); ret = readl_poll_timeout_atomic(chan->chip->regs + DMAC_CHEN, val, - !(val & chan_active), 1000, 10000); + !(val & chan_active), 1000, DMAC_TIMEOUT_US); if (ret == -ETIMEDOUT) dev_warn(dchan2dev(dchan), "%s failed to stop\n", axi_chan_name(chan)); @@ -1323,6 +1323,12 @@ static int parse_device_properties(struct axi_dma_chip *chip) chip->dw->hdata->m_data_width = tmp; + ret = device_property_read_u32(dev, "snps,num-hs-if", &tmp); + if (!ret) { + if (tmp > 16) + chip->dw->hdata->use_cfg2 = true; + } + ret = device_property_read_u32_array(dev, "snps,block-size", carr, chip->dw->hdata->nr_channels); if (ret) @@ -1410,6 +1416,16 @@ static int dw_probe(struct platform_device *pdev) if (IS_ERR(chip->cfgr_clk)) return PTR_ERR(chip->cfgr_clk); + if (of_device_is_compatible(node, "starfive,axi-dma")) { + chip->resets = devm_reset_control_array_get_exclusive(&pdev->dev); + if (IS_ERR(chip->resets)) + return PTR_ERR(chip->resets); + + ret = reset_control_deassert(chip->resets); + if (ret) + return ret; + } + ret = parse_device_properties(chip); if (ret) return ret; @@ -1554,6 +1570,7 @@ static const struct dev_pm_ops dw_axi_dma_pm_ops = { static const struct of_device_id dw_dma_of_id_table[] = { { .compatible = "snps,axi-dma-1.01a" }, { .compatible = "intel,kmb-axi-dma" }, + { .compatible = "starfive,axi-dma" }, {} }; MODULE_DEVICE_TABLE(of, dw_dma_of_id_table); diff --git a/drivers/dma/dw-axi-dmac/dw-axi-dmac.h b/drivers/dma/dw-axi-dmac/dw-axi-dmac.h index e9d5eb0fd594..761d95691c02 100644 --- a/drivers/dma/dw-axi-dmac/dw-axi-dmac.h +++ b/drivers/dma/dw-axi-dmac/dw-axi-dmac.h @@ -21,6 +21,7 @@ #define DMAC_MAX_CHANNELS 16 #define DMAC_MAX_MASTERS 2 #define DMAC_MAX_BLK_SIZE 0x200000 +#define DMAC_TIMEOUT_US 200000 struct dw_axi_dma_hcfg { u32 nr_channels; @@ -33,6 +34,7 @@ struct dw_axi_dma_hcfg { /* Register map for DMAX_NUM_CHANNELS <= 8 */ bool reg_map_8_channels; bool restrict_axi_burst_len; + bool use_cfg2; }; struct axi_dma_chan { @@ -70,6 +72,7 @@ struct axi_dma_chip { struct clk *core_clk; struct clk *cfgr_clk; struct dw_axi_dma *dw; + struct reset_control *resets; }; /* LLI == Linked List Item */