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Mon, 16 Oct 2023 16:17:56 +0000 From: Frank Li To: lpieralisi@kernel.org Cc: Frank.li@nxp.com, bhelgaas@google.com, helgaas@kernel.org, imx@lists.linux.dev, kw@linux.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, minghuan.Lian@nxp.com, mingkai.hu@nxp.com, robh@kernel.org, roy.zang@nxp.com Subject: [PATCH v2 1/3] PCI: layerscape: Add function pointer for exit_from_l2() Date: Mon, 16 Oct 2023 12:17:36 -0400 Message-Id: <20231016161738.2854352-1-Frank.Li@nxp.com> X-Mailer: git-send-email 2.34.1 X-ClientProxiedBy: BYAPR11CA0085.namprd11.prod.outlook.com (2603:10b6:a03:f4::26) To AM6PR04MB4838.eurprd04.prod.outlook.com (2603:10a6:20b:4::16) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: AM6PR04MB4838:EE_|AM9PR04MB7489:EE_ X-MS-Office365-Filtering-Correlation-Id: fe367f43-d6a4-4929-a475-08dbce637522 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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Using function pointer for ls1028. It prepare for other layerscape suspend/resume support. Signed-off-by: Frank Li --- Notes: Change from v1 to v2 - change subject 'a' to 'A' drivers/pci/controller/dwc/pci-layerscape.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/drivers/pci/controller/dwc/pci-layerscape.c b/drivers/pci/controller/dwc/pci-layerscape.c index b931d597656f..20c48c06e224 100644 --- a/drivers/pci/controller/dwc/pci-layerscape.c +++ b/drivers/pci/controller/dwc/pci-layerscape.c @@ -39,6 +39,8 @@ struct ls_pcie_drvdata { const u32 pf_off; + const struct dw_pcie_host_ops *ops; + void (*exit_from_l2)(struct dw_pcie_rp *pp); bool pm_support; }; @@ -180,6 +182,7 @@ static const struct ls_pcie_drvdata ls1021a_drvdata = { static const struct ls_pcie_drvdata layerscape_drvdata = { .pf_off = 0xc0000, .pm_support = true, + .exit_from_l2 = ls_pcie_exit_from_l2, }; static const struct of_device_id ls_pcie_of_match[] = { @@ -213,7 +216,7 @@ static int ls_pcie_probe(struct platform_device *pdev) pcie->drvdata = of_device_get_match_data(dev); pci->dev = dev; - pci->pp.ops = &ls_pcie_host_ops; + pci->pp.ops = pcie->drvdata->ops ? pcie->drvdata->ops : &ls_pcie_host_ops; pcie->pci = pci; @@ -251,7 +254,7 @@ static int ls_pcie_resume_noirq(struct device *dev) if (!pcie->drvdata->pm_support) return 0; - ls_pcie_exit_from_l2(&pcie->pci->pp); + pcie->drvdata->exit_from_l2(&pcie->pci->pp); return dw_pcie_resume_noirq(pcie->pci); } From patchwork Mon Oct 16 16:17:37 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Frank Li X-Patchwork-Id: 13423685 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 54E71CDB465 for ; Mon, 16 Oct 2023 16:26:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231508AbjJPQ0w (ORCPT ); Mon, 16 Oct 2023 12:26:52 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35004 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233904AbjJPQ0f (ORCPT ); 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Signed-off-by: Frank Li --- Notes: change from v1 to v2 - change subject 'a' to 'A' drivers/pci/controller/dwc/pci-layerscape.c | 88 ++++++++++++++++++++- 1 file changed, 87 insertions(+), 1 deletion(-) diff --git a/drivers/pci/controller/dwc/pci-layerscape.c b/drivers/pci/controller/dwc/pci-layerscape.c index 20c48c06e224..bc5a8ff1a26c 100644 --- a/drivers/pci/controller/dwc/pci-layerscape.c +++ b/drivers/pci/controller/dwc/pci-layerscape.c @@ -35,6 +35,12 @@ #define PF_MCR_PTOMR BIT(0) #define PF_MCR_EXL2S BIT(1) +/* LS1021A PEXn PM Write Control Register */ +#define SCFG_PEXPMWRCR(idx) (0x5c + (idx) * 0x64) +#define PMXMTTURNOFF BIT(31) +#define SCFG_PEXSFTRSTCR 0x190 +#define PEXSR(idx) BIT(idx) + #define PCIE_IATU_NUM 6 struct ls_pcie_drvdata { @@ -48,6 +54,8 @@ struct ls_pcie { struct dw_pcie *pci; const struct ls_pcie_drvdata *drvdata; void __iomem *pf_base; + struct regmap *scfg; + int index; bool big_endian; }; @@ -170,13 +178,91 @@ static int ls_pcie_host_init(struct dw_pcie_rp *pp) return 0; } +static void ls1021a_pcie_send_turnoff_msg(struct dw_pcie_rp *pp) +{ + struct dw_pcie *pci = to_dw_pcie_from_pp(pp); + struct ls_pcie *pcie = to_ls_pcie(pci); + u32 val; + + if (!pcie->scfg) { + dev_dbg(pcie->pci->dev, "SYSCFG is NULL\n"); + return; + } + + /* Send Turn_off message */ + regmap_read(pcie->scfg, SCFG_PEXPMWRCR(pcie->index), &val); + val |= PMXMTTURNOFF; + regmap_write(pcie->scfg, SCFG_PEXPMWRCR(pcie->index), val); + + /* There are not register to check ACK, so wait PCIE_PME_TO_L2_TIMEOUT_US */ + mdelay(PCIE_PME_TO_L2_TIMEOUT_US/1000); + + /* Clear Turn_off message */ + regmap_read(pcie->scfg, SCFG_PEXPMWRCR(pcie->index), &val); + val &= ~PMXMTTURNOFF; + regmap_write(pcie->scfg, SCFG_PEXPMWRCR(pcie->index), val); +} + +static void ls1021a_pcie_exit_from_l2(struct dw_pcie_rp *pp) +{ + struct dw_pcie *pci = to_dw_pcie_from_pp(pp); + struct ls_pcie *pcie = to_ls_pcie(pci); + u32 val; + + regmap_read(pcie->scfg, SCFG_PEXSFTRSTCR, &val); + val |= PEXSR(pcie->index); + regmap_write(pcie->scfg, SCFG_PEXSFTRSTCR, val); + + regmap_read(pcie->scfg, SCFG_PEXSFTRSTCR, &val); + val &= ~PEXSR(pcie->index); + regmap_write(pcie->scfg, SCFG_PEXSFTRSTCR, val); +} + +static int ls1021a_pcie_host_init(struct dw_pcie_rp *pp) +{ + struct dw_pcie *pci = to_dw_pcie_from_pp(pp); + struct ls_pcie *pcie = to_ls_pcie(pci); + struct device *dev = pcie->pci->dev; + u32 index[2]; + int ret; + + ret = ls_pcie_host_init(pp); + if (ret) + return ret; + + pcie->scfg = syscon_regmap_lookup_by_phandle(dev->of_node, "fsl,pcie-scfg"); + if (IS_ERR(pcie->scfg)) { + ret = PTR_ERR(pcie->scfg); + dev_err(dev, "No syscfg phandle specified\n"); + pcie->scfg = NULL; + return ret; + } + + ret = of_property_read_u32_array(dev->of_node, "fsl,pcie-scfg", index, 2); + if (ret) { + pcie->scfg = NULL; + return ret; + } + + pcie->index = index[1]; + + return ret; +} + static const struct dw_pcie_host_ops ls_pcie_host_ops = { .host_init = ls_pcie_host_init, .pme_turn_off = ls_pcie_send_turnoff_msg, }; +static const struct dw_pcie_host_ops ls1021a_pcie_host_ops = { + .host_init = ls1021a_pcie_host_init, + .pme_turn_off = ls1021a_pcie_send_turnoff_msg, +}; + static const struct ls_pcie_drvdata ls1021a_drvdata = { - .pm_support = false, + .pm_support = true, + .ops = &ls1021a_pcie_host_ops, + .exit_from_l2 = ls1021a_pcie_exit_from_l2, }; static const struct ls_pcie_drvdata layerscape_drvdata = { From patchwork Mon Oct 16 16:17:38 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Frank Li X-Patchwork-Id: 13423675 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 AE7ADCDB482 for ; Mon, 16 Oct 2023 16:20:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234020AbjJPQUT (ORCPT ); Mon, 16 Oct 2023 12:20:19 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35424 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234098AbjJPQUC (ORCPT ); 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Signed-off-by: Frank Li --- Notes: Change from v1 to v2 - Change subject 'a' to 'A' drivers/pci/controller/dwc/pci-layerscape.c | 91 ++++++++++++++++++++- 1 file changed, 90 insertions(+), 1 deletion(-) diff --git a/drivers/pci/controller/dwc/pci-layerscape.c b/drivers/pci/controller/dwc/pci-layerscape.c index bc5a8ff1a26c..debabb9bb41f 100644 --- a/drivers/pci/controller/dwc/pci-layerscape.c +++ b/drivers/pci/controller/dwc/pci-layerscape.c @@ -41,10 +41,20 @@ #define SCFG_PEXSFTRSTCR 0x190 #define PEXSR(idx) BIT(idx) +/* LS1043A PEX PME control register */ +#define SCFG_PEXPMECR 0x144 +#define PEXPME(idx) BIT(31 - (idx) * 4) + +/* LS1043A PEX LUT debug register */ +#define LS_PCIE_LDBG 0x7fc +#define LDBG_SR BIT(30) +#define LDBG_WE BIT(31) + #define PCIE_IATU_NUM 6 struct ls_pcie_drvdata { const u32 pf_off; + const u32 lut_off; const struct dw_pcie_host_ops *ops; void (*exit_from_l2)(struct dw_pcie_rp *pp); bool pm_support; @@ -54,6 +64,7 @@ struct ls_pcie { struct dw_pcie *pci; const struct ls_pcie_drvdata *drvdata; void __iomem *pf_base; + void __iomem *lut_base; struct regmap *scfg; int index; bool big_endian; @@ -116,6 +127,23 @@ static void ls_pcie_pf_writel(struct ls_pcie *pcie, u32 off, u32 val) iowrite32(val, pcie->pf_base + off); } +static u32 ls_pcie_lut_readl(struct ls_pcie *pcie, u32 off) +{ + if (pcie->big_endian) + return ioread32be(pcie->lut_base + off); + + return ioread32(pcie->lut_base + off); +} + +static void ls_pcie_lut_writel(struct ls_pcie *pcie, u32 off, u32 val) +{ + if (pcie->big_endian) + iowrite32be(val, pcie->lut_base + off); + else + iowrite32(val, pcie->lut_base + off); +} + + static void ls_pcie_send_turnoff_msg(struct dw_pcie_rp *pp) { struct dw_pcie *pci = to_dw_pcie_from_pp(pp); @@ -249,6 +277,54 @@ static int ls1021a_pcie_host_init(struct dw_pcie_rp *pp) return ret; } +static void ls1043a_pcie_send_turnoff_msg(struct dw_pcie_rp *pp) +{ + struct dw_pcie *pci = to_dw_pcie_from_pp(pp); + struct ls_pcie *pcie = to_ls_pcie(pci); + u32 val; + + if (!pcie->scfg) { + dev_dbg(pcie->pci->dev, "SYSCFG is NULL\n"); + return; + } + + /* Send Turn_off message */ + regmap_read(pcie->scfg, SCFG_PEXPMECR, &val); + val |= PEXPME(pcie->index); + regmap_write(pcie->scfg, SCFG_PEXPMECR, val); + + /* There are not register to check ACK, so wait PCIE_PME_TO_L2_TIMEOUT_US */ + mdelay(PCIE_PME_TO_L2_TIMEOUT_US/1000); + + /* Clear Turn_off message */ + regmap_read(pcie->scfg, SCFG_PEXPMECR, &val); + val &= ~PEXPME(pcie->index); + regmap_write(pcie->scfg, SCFG_PEXPMECR, val); +} + +static void ls1043a_pcie_exit_from_l2(struct dw_pcie_rp *pp) +{ + struct dw_pcie *pci = to_dw_pcie_from_pp(pp); + struct ls_pcie *pcie = to_ls_pcie(pci); + u32 val; + + val = ls_pcie_lut_readl(pcie, LS_PCIE_LDBG); + val |= LDBG_WE; + ls_pcie_lut_writel(pcie, LS_PCIE_LDBG, val); + + val = ls_pcie_lut_readl(pcie, LS_PCIE_LDBG); + val |= LDBG_SR; + ls_pcie_lut_writel(pcie, LS_PCIE_LDBG, val); + + val = ls_pcie_lut_readl(pcie, LS_PCIE_LDBG); + val &= ~LDBG_SR; + ls_pcie_lut_writel(pcie, LS_PCIE_LDBG, val); + + val = ls_pcie_lut_readl(pcie, LS_PCIE_LDBG); + val &= ~LDBG_WE; + ls_pcie_lut_writel(pcie, LS_PCIE_LDBG, val); +} + static const struct dw_pcie_host_ops ls_pcie_host_ops = { .host_init = ls_pcie_host_init, .pme_turn_off = ls_pcie_send_turnoff_msg, @@ -265,6 +341,18 @@ static const struct ls_pcie_drvdata ls1021a_drvdata = { .exit_from_l2 = ls1021a_pcie_exit_from_l2, }; +static const struct dw_pcie_host_ops ls1043a_pcie_host_ops = { + .host_init = ls1021a_pcie_host_init, /* the same as ls1021 */ + .pme_turn_off = ls1043a_pcie_send_turnoff_msg, +}; + +static const struct ls_pcie_drvdata ls1043a_drvdata = { + .lut_off = 0x10000, + .pm_support = true, + .ops = &ls1043a_pcie_host_ops, + .exit_from_l2 = ls1043a_pcie_exit_from_l2, +}; + static const struct ls_pcie_drvdata layerscape_drvdata = { .pf_off = 0xc0000, .pm_support = true, @@ -275,7 +363,7 @@ static const struct of_device_id ls_pcie_of_match[] = { { .compatible = "fsl,ls1012a-pcie", .data = &layerscape_drvdata }, { .compatible = "fsl,ls1021a-pcie", .data = &ls1021a_drvdata }, { .compatible = "fsl,ls1028a-pcie", .data = &layerscape_drvdata }, - { .compatible = "fsl,ls1043a-pcie", .data = &ls1021a_drvdata }, + { .compatible = "fsl,ls1043a-pcie", .data = &ls1043a_drvdata }, { .compatible = "fsl,ls1046a-pcie", .data = &layerscape_drvdata }, { .compatible = "fsl,ls2080a-pcie", .data = &layerscape_drvdata }, { .compatible = "fsl,ls2085a-pcie", .data = &layerscape_drvdata }, @@ -314,6 +402,7 @@ static int ls_pcie_probe(struct platform_device *pdev) pcie->big_endian = of_property_read_bool(dev->of_node, "big-endian"); pcie->pf_base = pci->dbi_base + pcie->drvdata->pf_off; + pcie->lut_base = pci->dbi_base + pcie->drvdata->lut_off; if (!ls_pcie_is_bridge(pcie)) return -ENODEV;