mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-17 09:14:19 +08:00
7659806ade
The dw_plat_pcie_of_match[] forward declaration was required when
dw_plat_pcie_probe() called of_match_device(). 5c204204cf
("PCI:
designware-plat: Prefer of_device_get_match_data()") replaced that with
of_device_get_match_data(), which no longer needs the declaration.
Drop the unnecessary forward declaration.
[bhelgaas: commit log]
Link: https://lore.kernel.org/r/20220624143428.8334-19-Sergey.Semin@baikalelectronics.ru
Tested-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Reviewed-by: Rob Herring <robh@kernel.org>
188 lines
4.1 KiB
C
188 lines
4.1 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* PCIe RC driver for Synopsys DesignWare Core
|
|
*
|
|
* Copyright (C) 2015-2016 Synopsys, Inc. (www.synopsys.com)
|
|
*
|
|
* Authors: Joao Pinto <Joao.Pinto@synopsys.com>
|
|
*/
|
|
#include <linux/clk.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/gpio.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/init.h>
|
|
#include <linux/of_device.h>
|
|
#include <linux/pci.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/resource.h>
|
|
#include <linux/types.h>
|
|
|
|
#include "pcie-designware.h"
|
|
|
|
struct dw_plat_pcie {
|
|
struct dw_pcie *pci;
|
|
enum dw_pcie_device_mode mode;
|
|
};
|
|
|
|
struct dw_plat_pcie_of_data {
|
|
enum dw_pcie_device_mode mode;
|
|
};
|
|
|
|
static const struct dw_pcie_host_ops dw_plat_pcie_host_ops = {
|
|
};
|
|
|
|
static void dw_plat_pcie_ep_init(struct dw_pcie_ep *ep)
|
|
{
|
|
struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
|
|
enum pci_barno bar;
|
|
|
|
for (bar = 0; bar < PCI_STD_NUM_BARS; bar++)
|
|
dw_pcie_ep_reset_bar(pci, bar);
|
|
}
|
|
|
|
static int dw_plat_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 0;
|
|
}
|
|
|
|
static const struct pci_epc_features dw_plat_pcie_epc_features = {
|
|
.linkup_notifier = false,
|
|
.msi_capable = true,
|
|
.msix_capable = true,
|
|
};
|
|
|
|
static const struct pci_epc_features*
|
|
dw_plat_pcie_get_features(struct dw_pcie_ep *ep)
|
|
{
|
|
return &dw_plat_pcie_epc_features;
|
|
}
|
|
|
|
static const struct dw_pcie_ep_ops pcie_ep_ops = {
|
|
.ep_init = dw_plat_pcie_ep_init,
|
|
.raise_irq = dw_plat_pcie_ep_raise_irq,
|
|
.get_features = dw_plat_pcie_get_features,
|
|
};
|
|
|
|
static int dw_plat_add_pcie_port(struct dw_plat_pcie *dw_plat_pcie,
|
|
struct platform_device *pdev)
|
|
{
|
|
struct dw_pcie *pci = dw_plat_pcie->pci;
|
|
struct dw_pcie_rp *pp = &pci->pp;
|
|
struct device *dev = &pdev->dev;
|
|
int ret;
|
|
|
|
pp->irq = platform_get_irq(pdev, 1);
|
|
if (pp->irq < 0)
|
|
return pp->irq;
|
|
|
|
pp->num_vectors = MAX_MSI_IRQS;
|
|
pp->ops = &dw_plat_pcie_host_ops;
|
|
|
|
ret = dw_pcie_host_init(pp);
|
|
if (ret) {
|
|
dev_err(dev, "Failed to initialize host\n");
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int dw_plat_pcie_probe(struct platform_device *pdev)
|
|
{
|
|
struct device *dev = &pdev->dev;
|
|
struct dw_plat_pcie *dw_plat_pcie;
|
|
struct dw_pcie *pci;
|
|
int ret;
|
|
const struct dw_plat_pcie_of_data *data;
|
|
enum dw_pcie_device_mode mode;
|
|
|
|
data = of_device_get_match_data(dev);
|
|
if (!data)
|
|
return -EINVAL;
|
|
|
|
mode = (enum dw_pcie_device_mode)data->mode;
|
|
|
|
dw_plat_pcie = devm_kzalloc(dev, sizeof(*dw_plat_pcie), GFP_KERNEL);
|
|
if (!dw_plat_pcie)
|
|
return -ENOMEM;
|
|
|
|
pci = devm_kzalloc(dev, sizeof(*pci), GFP_KERNEL);
|
|
if (!pci)
|
|
return -ENOMEM;
|
|
|
|
pci->dev = dev;
|
|
|
|
dw_plat_pcie->pci = pci;
|
|
dw_plat_pcie->mode = mode;
|
|
|
|
platform_set_drvdata(pdev, dw_plat_pcie);
|
|
|
|
switch (dw_plat_pcie->mode) {
|
|
case DW_PCIE_RC_TYPE:
|
|
if (!IS_ENABLED(CONFIG_PCIE_DW_PLAT_HOST))
|
|
return -ENODEV;
|
|
|
|
ret = dw_plat_add_pcie_port(dw_plat_pcie, pdev);
|
|
break;
|
|
case DW_PCIE_EP_TYPE:
|
|
if (!IS_ENABLED(CONFIG_PCIE_DW_PLAT_EP))
|
|
return -ENODEV;
|
|
|
|
pci->ep.ops = &pcie_ep_ops;
|
|
ret = dw_pcie_ep_init(&pci->ep);
|
|
break;
|
|
default:
|
|
dev_err(dev, "INVALID device type %d\n", dw_plat_pcie->mode);
|
|
ret = -EINVAL;
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static const struct dw_plat_pcie_of_data dw_plat_pcie_rc_of_data = {
|
|
.mode = DW_PCIE_RC_TYPE,
|
|
};
|
|
|
|
static const struct dw_plat_pcie_of_data dw_plat_pcie_ep_of_data = {
|
|
.mode = DW_PCIE_EP_TYPE,
|
|
};
|
|
|
|
static const struct of_device_id dw_plat_pcie_of_match[] = {
|
|
{
|
|
.compatible = "snps,dw-pcie",
|
|
.data = &dw_plat_pcie_rc_of_data,
|
|
},
|
|
{
|
|
.compatible = "snps,dw-pcie-ep",
|
|
.data = &dw_plat_pcie_ep_of_data,
|
|
},
|
|
{},
|
|
};
|
|
|
|
static struct platform_driver dw_plat_pcie_driver = {
|
|
.driver = {
|
|
.name = "dw-pcie",
|
|
.of_match_table = dw_plat_pcie_of_match,
|
|
.suppress_bind_attrs = true,
|
|
},
|
|
.probe = dw_plat_pcie_probe,
|
|
};
|
|
builtin_platform_driver(dw_plat_pcie_driver);
|