158 lines
3.5 KiB
C
158 lines
3.5 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* PCIe controller EP driver for Freescale Layerscape SoCs
|
|
*
|
|
* Copyright (C) 2018 NXP Semiconductor.
|
|
*
|
|
* Author: Xiaowei Bao <xiaowei.bao@nxp.com>
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/init.h>
|
|
#include <linux/of_pci.h>
|
|
#include <linux/of_platform.h>
|
|
#include <linux/of_address.h>
|
|
#include <linux/pci.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/resource.h>
|
|
|
|
#include "pcie-designware.h"
|
|
|
|
#define PCIE_DBI2_OFFSET 0x1000 /* DBI2 base address*/
|
|
|
|
struct ls_pcie_ep {
|
|
struct dw_pcie *pci;
|
|
};
|
|
|
|
#define to_ls_pcie_ep(x) dev_get_drvdata((x)->dev)
|
|
|
|
static int ls_pcie_establish_link(struct dw_pcie *pci)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static const struct dw_pcie_ops ls_pcie_ep_ops = {
|
|
.start_link = ls_pcie_establish_link,
|
|
};
|
|
|
|
static const struct of_device_id ls_pcie_ep_of_match[] = {
|
|
{ .compatible = "fsl,ls-pcie-ep",},
|
|
{ },
|
|
};
|
|
|
|
static const struct pci_epc_features ls_pcie_epc_features = {
|
|
.linkup_notifier = false,
|
|
.msi_capable = true,
|
|
.msix_capable = false,
|
|
.bar_fixed_64bit = (1 << BAR_2) | (1 << BAR_4),
|
|
};
|
|
|
|
static const struct pci_epc_features*
|
|
ls_pcie_ep_get_features(struct dw_pcie_ep *ep)
|
|
{
|
|
return &ls_pcie_epc_features;
|
|
}
|
|
|
|
static void ls_pcie_ep_init(struct dw_pcie_ep *ep)
|
|
{
|
|
struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
|
|
enum pci_barno bar;
|
|
|
|
for (bar = BAR_0; bar <= BAR_5; bar++)
|
|
dw_pcie_ep_reset_bar(pci, bar);
|
|
}
|
|
|
|
static int ls_pcie_ep_raise_irq(struct dw_pcie_ep *ep, u8 func_no,
|
|
enum pci_epc_irq_type type, u16 interrupt_num)
|
|
{
|
|
struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
|
|
|
|
switch (type) {
|
|
case PCI_EPC_IRQ_LEGACY:
|
|
return dw_pcie_ep_raise_legacy_irq(ep, func_no);
|
|
case PCI_EPC_IRQ_MSI:
|
|
return dw_pcie_ep_raise_msi_irq(ep, func_no, interrupt_num);
|
|
case PCI_EPC_IRQ_MSIX:
|
|
return dw_pcie_ep_raise_msix_irq(ep, func_no, interrupt_num);
|
|
default:
|
|
dev_err(pci->dev, "UNKNOWN IRQ type\n");
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
static const struct dw_pcie_ep_ops pcie_ep_ops = {
|
|
.ep_init = ls_pcie_ep_init,
|
|
.raise_irq = ls_pcie_ep_raise_irq,
|
|
.get_features = ls_pcie_ep_get_features,
|
|
};
|
|
|
|
static int __init ls_add_pcie_ep(struct ls_pcie_ep *pcie,
|
|
struct platform_device *pdev)
|
|
{
|
|
struct dw_pcie *pci = pcie->pci;
|
|
struct device *dev = pci->dev;
|
|
struct dw_pcie_ep *ep;
|
|
struct resource *res;
|
|
int ret;
|
|
|
|
ep = &pci->ep;
|
|
ep->ops = &pcie_ep_ops;
|
|
|
|
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "addr_space");
|
|
if (!res)
|
|
return -EINVAL;
|
|
|
|
ep->phys_base = res->start;
|
|
ep->addr_size = resource_size(res);
|
|
|
|
ret = dw_pcie_ep_init(ep);
|
|
if (ret) {
|
|
dev_err(dev, "failed to initialize endpoint\n");
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int __init ls_pcie_ep_probe(struct platform_device *pdev)
|
|
{
|
|
struct device *dev = &pdev->dev;
|
|
struct dw_pcie *pci;
|
|
struct ls_pcie_ep *pcie;
|
|
struct resource *dbi_base;
|
|
int ret;
|
|
|
|
pcie = devm_kzalloc(dev, sizeof(*pcie), GFP_KERNEL);
|
|
if (!pcie)
|
|
return -ENOMEM;
|
|
|
|
pci = devm_kzalloc(dev, sizeof(*pci), GFP_KERNEL);
|
|
if (!pci)
|
|
return -ENOMEM;
|
|
|
|
dbi_base = platform_get_resource_byname(pdev, IORESOURCE_MEM, "regs");
|
|
pci->dbi_base = devm_pci_remap_cfg_resource(dev, dbi_base);
|
|
if (IS_ERR(pci->dbi_base))
|
|
return PTR_ERR(pci->dbi_base);
|
|
|
|
pci->dbi_base2 = pci->dbi_base + PCIE_DBI2_OFFSET;
|
|
pci->dev = dev;
|
|
pci->ops = &ls_pcie_ep_ops;
|
|
pcie->pci = pci;
|
|
|
|
platform_set_drvdata(pdev, pcie);
|
|
|
|
ret = ls_add_pcie_ep(pcie, pdev);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static struct platform_driver ls_pcie_ep_driver = {
|
|
.driver = {
|
|
.name = "layerscape-pcie-ep",
|
|
.of_match_table = ls_pcie_ep_of_match,
|
|
.suppress_bind_attrs = true,
|
|
},
|
|
};
|
|
builtin_platform_driver_probe(ls_pcie_ep_driver, ls_pcie_ep_probe);
|