From 2c3c1048746a4622d8c89a29670120dc8fab93c4 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Sun, 7 Apr 2024 20:49:45 +0200
Subject: Adding upstream version 6.1.76.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 drivers/pci/controller/pcie-iproc-platform.c | 145 +++++++++++++++++++++++++++
 1 file changed, 145 insertions(+)
 create mode 100644 drivers/pci/controller/pcie-iproc-platform.c

(limited to 'drivers/pci/controller/pcie-iproc-platform.c')

diff --git a/drivers/pci/controller/pcie-iproc-platform.c b/drivers/pci/controller/pcie-iproc-platform.c
new file mode 100644
index 000000000..538115246
--- /dev/null
+++ b/drivers/pci/controller/pcie-iproc-platform.c
@@ -0,0 +1,145 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2015 Broadcom Corporation
+ */
+
+#include <linux/kernel.h>
+#include <linux/pci.h>
+#include <linux/clk.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <linux/of_address.h>
+#include <linux/of_pci.h>
+#include <linux/of_irq.h>
+#include <linux/of_platform.h>
+#include <linux/phy/phy.h>
+
+#include "../pci.h"
+#include "pcie-iproc.h"
+
+static const struct of_device_id iproc_pcie_of_match_table[] = {
+	{
+		.compatible = "brcm,iproc-pcie",
+		.data = (int *)IPROC_PCIE_PAXB,
+	}, {
+		.compatible = "brcm,iproc-pcie-paxb-v2",
+		.data = (int *)IPROC_PCIE_PAXB_V2,
+	}, {
+		.compatible = "brcm,iproc-pcie-paxc",
+		.data = (int *)IPROC_PCIE_PAXC,
+	}, {
+		.compatible = "brcm,iproc-pcie-paxc-v2",
+		.data = (int *)IPROC_PCIE_PAXC_V2,
+	},
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, iproc_pcie_of_match_table);
+
+static int iproc_pltfm_pcie_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct iproc_pcie *pcie;
+	struct device_node *np = dev->of_node;
+	struct resource reg;
+	struct pci_host_bridge *bridge;
+	int ret;
+
+	bridge = devm_pci_alloc_host_bridge(dev, sizeof(*pcie));
+	if (!bridge)
+		return -ENOMEM;
+
+	pcie = pci_host_bridge_priv(bridge);
+
+	pcie->dev = dev;
+	pcie->type = (enum iproc_pcie_type) of_device_get_match_data(dev);
+
+	ret = of_address_to_resource(np, 0, &reg);
+	if (ret < 0) {
+		dev_err(dev, "unable to obtain controller resources\n");
+		return ret;
+	}
+
+	pcie->base = devm_pci_remap_cfgspace(dev, reg.start,
+					     resource_size(&reg));
+	if (!pcie->base) {
+		dev_err(dev, "unable to map controller registers\n");
+		return -ENOMEM;
+	}
+	pcie->base_addr = reg.start;
+
+	if (of_property_read_bool(np, "brcm,pcie-ob")) {
+		u32 val;
+
+		ret = of_property_read_u32(np, "brcm,pcie-ob-axi-offset",
+					   &val);
+		if (ret) {
+			dev_err(dev,
+				"missing brcm,pcie-ob-axi-offset property\n");
+			return ret;
+		}
+		pcie->ob.axi_offset = val;
+		pcie->need_ob_cfg = true;
+	}
+
+	/*
+	 * DT nodes are not used by all platforms that use the iProc PCIe
+	 * core driver. For platforms that require explicit inbound mapping
+	 * configuration, "dma-ranges" would have been present in DT
+	 */
+	pcie->need_ib_cfg = of_property_read_bool(np, "dma-ranges");
+
+	/* PHY use is optional */
+	pcie->phy = devm_phy_optional_get(dev, "pcie-phy");
+	if (IS_ERR(pcie->phy))
+		return PTR_ERR(pcie->phy);
+
+	/* PAXC doesn't support legacy IRQs, skip mapping */
+	switch (pcie->type) {
+	case IPROC_PCIE_PAXC:
+	case IPROC_PCIE_PAXC_V2:
+		pcie->map_irq = NULL;
+		break;
+	default:
+		break;
+	}
+
+	ret = iproc_pcie_setup(pcie, &bridge->windows);
+	if (ret) {
+		dev_err(dev, "PCIe controller setup failed\n");
+		return ret;
+	}
+
+	platform_set_drvdata(pdev, pcie);
+	return 0;
+}
+
+static int iproc_pltfm_pcie_remove(struct platform_device *pdev)
+{
+	struct iproc_pcie *pcie = platform_get_drvdata(pdev);
+
+	return iproc_pcie_remove(pcie);
+}
+
+static void iproc_pltfm_pcie_shutdown(struct platform_device *pdev)
+{
+	struct iproc_pcie *pcie = platform_get_drvdata(pdev);
+
+	iproc_pcie_shutdown(pcie);
+}
+
+static struct platform_driver iproc_pltfm_pcie_driver = {
+	.driver = {
+		.name = "iproc-pcie",
+		.of_match_table = of_match_ptr(iproc_pcie_of_match_table),
+	},
+	.probe = iproc_pltfm_pcie_probe,
+	.remove = iproc_pltfm_pcie_remove,
+	.shutdown = iproc_pltfm_pcie_shutdown,
+};
+module_platform_driver(iproc_pltfm_pcie_driver);
+
+MODULE_AUTHOR("Ray Jui <rjui@broadcom.com>");
+MODULE_DESCRIPTION("Broadcom iPROC PCIe platform driver");
+MODULE_LICENSE("GPL v2");
-- 
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