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181 lines
4.5 KiB
181 lines
4.5 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* PCIe controller EP driver for Freescale Layerscape SoCs |
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* |
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* Copyright (C) 2018 NXP Semiconductor. |
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* |
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* Author: Xiaowei Bao <[email protected]> |
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*/ |
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#include <linux/kernel.h> |
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#include <linux/init.h> |
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#include <linux/of_pci.h> |
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#include <linux/of_platform.h> |
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#include <linux/of_address.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 "pcie-designware.h" |
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#define to_ls_pcie_ep(x) dev_get_drvdata((x)->dev) |
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struct ls_pcie_ep_drvdata { |
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u32 func_offset; |
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const struct dw_pcie_ep_ops *ops; |
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const struct dw_pcie_ops *dw_pcie_ops; |
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}; |
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struct ls_pcie_ep { |
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struct dw_pcie *pci; |
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struct pci_epc_features *ls_epc; |
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const struct ls_pcie_ep_drvdata *drvdata; |
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}; |
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static int ls_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_ls_pcie_ep_ops = { |
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.start_link = ls_pcie_establish_link, |
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}; |
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static const struct pci_epc_features* |
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ls_pcie_ep_get_features(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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struct ls_pcie_ep *pcie = to_ls_pcie_ep(pci); |
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return pcie->ls_epc; |
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} |
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static void ls_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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struct ls_pcie_ep *pcie = to_ls_pcie_ep(pci); |
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struct dw_pcie_ep_func *ep_func; |
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enum pci_barno bar; |
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ep_func = dw_pcie_ep_get_func_from_ep(ep, 0); |
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if (!ep_func) |
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return; |
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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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pcie->ls_epc->msi_capable = ep_func->msi_cap ? true : false; |
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pcie->ls_epc->msix_capable = ep_func->msix_cap ? true : false; |
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} |
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static int ls_pcie_ep_raise_irq(struct dw_pcie_ep *ep, u8 func_no, |
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enum pci_epc_irq_type type, 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_doorbell(ep, func_no, |
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interrupt_num); |
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default: |
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dev_err(pci->dev, "UNKNOWN IRQ type\n"); |
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return -EINVAL; |
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} |
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} |
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static unsigned int ls_pcie_ep_func_conf_select(struct dw_pcie_ep *ep, |
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u8 func_no) |
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{ |
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struct dw_pcie *pci = to_dw_pcie_from_ep(ep); |
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struct ls_pcie_ep *pcie = to_ls_pcie_ep(pci); |
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WARN_ON(func_no && !pcie->drvdata->func_offset); |
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return pcie->drvdata->func_offset * func_no; |
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} |
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static const struct dw_pcie_ep_ops ls_pcie_ep_ops = { |
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.ep_init = ls_pcie_ep_init, |
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.raise_irq = ls_pcie_ep_raise_irq, |
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.get_features = ls_pcie_ep_get_features, |
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.func_conf_select = ls_pcie_ep_func_conf_select, |
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}; |
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static const struct ls_pcie_ep_drvdata ls1_ep_drvdata = { |
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.ops = &ls_pcie_ep_ops, |
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.dw_pcie_ops = &dw_ls_pcie_ep_ops, |
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}; |
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static const struct ls_pcie_ep_drvdata ls2_ep_drvdata = { |
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.func_offset = 0x20000, |
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.ops = &ls_pcie_ep_ops, |
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.dw_pcie_ops = &dw_ls_pcie_ep_ops, |
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}; |
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static const struct ls_pcie_ep_drvdata lx2_ep_drvdata = { |
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.func_offset = 0x8000, |
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.ops = &ls_pcie_ep_ops, |
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.dw_pcie_ops = &dw_ls_pcie_ep_ops, |
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}; |
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static const struct of_device_id ls_pcie_ep_of_match[] = { |
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{ .compatible = "fsl,ls1046a-pcie-ep", .data = &ls1_ep_drvdata }, |
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{ .compatible = "fsl,ls1088a-pcie-ep", .data = &ls2_ep_drvdata }, |
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{ .compatible = "fsl,ls2088a-pcie-ep", .data = &ls2_ep_drvdata }, |
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{ .compatible = "fsl,lx2160ar2-pcie-ep", .data = &lx2_ep_drvdata }, |
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{ }, |
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}; |
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static int __init ls_pcie_ep_probe(struct platform_device *pdev) |
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{ |
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struct device *dev = &pdev->dev; |
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struct dw_pcie *pci; |
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struct ls_pcie_ep *pcie; |
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struct pci_epc_features *ls_epc; |
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struct resource *dbi_base; |
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pcie = devm_kzalloc(dev, sizeof(*pcie), GFP_KERNEL); |
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if (!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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ls_epc = devm_kzalloc(dev, sizeof(*ls_epc), GFP_KERNEL); |
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if (!ls_epc) |
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return -ENOMEM; |
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pcie->drvdata = of_device_get_match_data(dev); |
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pci->dev = dev; |
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pci->ops = pcie->drvdata->dw_pcie_ops; |
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ls_epc->bar_fixed_64bit = (1 << BAR_2) | (1 << BAR_4); |
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pcie->pci = pci; |
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pcie->ls_epc = ls_epc; |
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dbi_base = platform_get_resource_byname(pdev, IORESOURCE_MEM, "regs"); |
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pci->dbi_base = devm_pci_remap_cfg_resource(dev, dbi_base); |
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if (IS_ERR(pci->dbi_base)) |
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return PTR_ERR(pci->dbi_base); |
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pci->ep.ops = &ls_pcie_ep_ops; |
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platform_set_drvdata(pdev, pcie); |
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return dw_pcie_ep_init(&pci->ep); |
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} |
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static struct platform_driver ls_pcie_ep_driver = { |
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.driver = { |
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.name = "layerscape-pcie-ep", |
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.of_match_table = ls_pcie_ep_of_match, |
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.suppress_bind_attrs = true, |
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}, |
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}; |
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builtin_platform_driver_probe(ls_pcie_ep_driver, ls_pcie_ep_probe);
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