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202 lines
4.5 KiB
202 lines
4.5 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* PCIe RC driver for Synopsys DesignWare Core |
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* |
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* Copyright (C) 2015-2016 Synopsys, Inc. (www.synopsys.com) |
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* |
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* Authors: Joao Pinto <[email protected]> |
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*/ |
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#include <linux/clk.h> |
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#include <linux/delay.h> |
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#include <linux/gpio.h> |
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#include <linux/interrupt.h> |
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#include <linux/kernel.h> |
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#include <linux/init.h> |
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#include <linux/of_device.h> |
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#include <linux/pci.h> |
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#include <linux/platform_device.h> |
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#include <linux/resource.h> |
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#include <linux/types.h> |
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#include <linux/regmap.h> |
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#include "pcie-designware.h" |
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struct dw_plat_pcie { |
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struct dw_pcie *pci; |
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struct regmap *regmap; |
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enum dw_pcie_device_mode mode; |
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}; |
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struct dw_plat_pcie_of_data { |
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enum dw_pcie_device_mode mode; |
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}; |
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static const struct of_device_id dw_plat_pcie_of_match[]; |
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static const struct dw_pcie_host_ops dw_plat_pcie_host_ops = { |
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}; |
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static int dw_plat_pcie_establish_link(struct dw_pcie *pci) |
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{ |
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return 0; |
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} |
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static const struct dw_pcie_ops dw_pcie_ops = { |
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.start_link = dw_plat_pcie_establish_link, |
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}; |
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static void dw_plat_pcie_ep_init(struct dw_pcie_ep *ep) |
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{ |
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struct dw_pcie *pci = to_dw_pcie_from_ep(ep); |
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enum pci_barno bar; |
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for (bar = 0; bar < PCI_STD_NUM_BARS; bar++) |
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dw_pcie_ep_reset_bar(pci, bar); |
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} |
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static int dw_plat_pcie_ep_raise_irq(struct dw_pcie_ep *ep, u8 func_no, |
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enum pci_epc_irq_type type, |
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u16 interrupt_num) |
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{ |
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struct dw_pcie *pci = to_dw_pcie_from_ep(ep); |
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switch (type) { |
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case PCI_EPC_IRQ_LEGACY: |
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return dw_pcie_ep_raise_legacy_irq(ep, func_no); |
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case PCI_EPC_IRQ_MSI: |
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return dw_pcie_ep_raise_msi_irq(ep, func_no, interrupt_num); |
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case PCI_EPC_IRQ_MSIX: |
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return dw_pcie_ep_raise_msix_irq(ep, func_no, interrupt_num); |
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default: |
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dev_err(pci->dev, "UNKNOWN IRQ type\n"); |
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} |
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return 0; |
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} |
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static const struct pci_epc_features dw_plat_pcie_epc_features = { |
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.linkup_notifier = false, |
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.msi_capable = true, |
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.msix_capable = true, |
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}; |
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static const struct pci_epc_features* |
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dw_plat_pcie_get_features(struct dw_pcie_ep *ep) |
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{ |
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return &dw_plat_pcie_epc_features; |
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} |
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static const struct dw_pcie_ep_ops pcie_ep_ops = { |
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.ep_init = dw_plat_pcie_ep_init, |
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.raise_irq = dw_plat_pcie_ep_raise_irq, |
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.get_features = dw_plat_pcie_get_features, |
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}; |
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static int dw_plat_add_pcie_port(struct dw_plat_pcie *dw_plat_pcie, |
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struct platform_device *pdev) |
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{ |
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struct dw_pcie *pci = dw_plat_pcie->pci; |
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struct pcie_port *pp = &pci->pp; |
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struct device *dev = &pdev->dev; |
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int ret; |
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pp->irq = platform_get_irq(pdev, 1); |
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if (pp->irq < 0) |
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return pp->irq; |
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pp->num_vectors = MAX_MSI_IRQS; |
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pp->ops = &dw_plat_pcie_host_ops; |
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ret = dw_pcie_host_init(pp); |
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if (ret) { |
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dev_err(dev, "Failed to initialize host\n"); |
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return ret; |
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} |
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return 0; |
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} |
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static int dw_plat_pcie_probe(struct platform_device *pdev) |
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{ |
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struct device *dev = &pdev->dev; |
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struct dw_plat_pcie *dw_plat_pcie; |
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struct dw_pcie *pci; |
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int ret; |
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const struct of_device_id *match; |
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const struct dw_plat_pcie_of_data *data; |
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enum dw_pcie_device_mode mode; |
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match = of_match_device(dw_plat_pcie_of_match, dev); |
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if (!match) |
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return -EINVAL; |
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data = (struct dw_plat_pcie_of_data *)match->data; |
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mode = (enum dw_pcie_device_mode)data->mode; |
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dw_plat_pcie = devm_kzalloc(dev, sizeof(*dw_plat_pcie), GFP_KERNEL); |
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if (!dw_plat_pcie) |
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return -ENOMEM; |
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pci = devm_kzalloc(dev, sizeof(*pci), GFP_KERNEL); |
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if (!pci) |
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return -ENOMEM; |
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pci->dev = dev; |
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pci->ops = &dw_pcie_ops; |
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dw_plat_pcie->pci = pci; |
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dw_plat_pcie->mode = mode; |
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platform_set_drvdata(pdev, dw_plat_pcie); |
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switch (dw_plat_pcie->mode) { |
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case DW_PCIE_RC_TYPE: |
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if (!IS_ENABLED(CONFIG_PCIE_DW_PLAT_HOST)) |
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return -ENODEV; |
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ret = dw_plat_add_pcie_port(dw_plat_pcie, pdev); |
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if (ret < 0) |
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return ret; |
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break; |
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case DW_PCIE_EP_TYPE: |
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if (!IS_ENABLED(CONFIG_PCIE_DW_PLAT_EP)) |
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return -ENODEV; |
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pci->ep.ops = &pcie_ep_ops; |
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return dw_pcie_ep_init(&pci->ep); |
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default: |
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dev_err(dev, "INVALID device type %d\n", dw_plat_pcie->mode); |
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} |
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return 0; |
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} |
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static const struct dw_plat_pcie_of_data dw_plat_pcie_rc_of_data = { |
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.mode = DW_PCIE_RC_TYPE, |
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}; |
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static const struct dw_plat_pcie_of_data dw_plat_pcie_ep_of_data = { |
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.mode = DW_PCIE_EP_TYPE, |
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}; |
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static const struct of_device_id dw_plat_pcie_of_match[] = { |
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{ |
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.compatible = "snps,dw-pcie", |
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.data = &dw_plat_pcie_rc_of_data, |
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}, |
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{ |
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.compatible = "snps,dw-pcie-ep", |
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.data = &dw_plat_pcie_ep_of_data, |
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}, |
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{}, |
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}; |
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static struct platform_driver dw_plat_pcie_driver = { |
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.driver = { |
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.name = "dw-pcie", |
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.of_match_table = dw_plat_pcie_of_match, |
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.suppress_bind_attrs = true, |
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}, |
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.probe = dw_plat_pcie_probe, |
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}; |
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builtin_platform_driver(dw_plat_pcie_driver);
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