mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-23 17:30:02 +00:00
![Krzysztof Wilczyński](/assets/img/avatar_default.png)
Replace command with a semicolon to correct syntax and to prevent potential unspecified behaviour and/or unintended side effects. Related: https://lore.kernel.org/linux-pci/20201216131944.14990-1-zhengyongjun3@huawei.com/ Co-authored-by: Zheng Yongjun <zhengyongjun3@huawei.com> Link: https://lore.kernel.org/r/20210311033745.1547044-1-kw@linux.com Signed-off-by: Krzysztof Wilczyński <kw@linux.com> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Acked-by: Roy Zang <roy.zang@nxp.com>
181 lines
4.5 KiB
C
181 lines
4.5 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 to_ls_pcie_ep(x) dev_get_drvdata((x)->dev)
|
|
|
|
struct ls_pcie_ep_drvdata {
|
|
u32 func_offset;
|
|
const struct dw_pcie_ep_ops *ops;
|
|
const struct dw_pcie_ops *dw_pcie_ops;
|
|
};
|
|
|
|
struct ls_pcie_ep {
|
|
struct dw_pcie *pci;
|
|
struct pci_epc_features *ls_epc;
|
|
const struct ls_pcie_ep_drvdata *drvdata;
|
|
};
|
|
|
|
static int ls_pcie_establish_link(struct dw_pcie *pci)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static const struct dw_pcie_ops dw_ls_pcie_ep_ops = {
|
|
.start_link = ls_pcie_establish_link,
|
|
};
|
|
|
|
static const struct pci_epc_features*
|
|
ls_pcie_ep_get_features(struct dw_pcie_ep *ep)
|
|
{
|
|
struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
|
|
struct ls_pcie_ep *pcie = to_ls_pcie_ep(pci);
|
|
|
|
return pcie->ls_epc;
|
|
}
|
|
|
|
static void ls_pcie_ep_init(struct dw_pcie_ep *ep)
|
|
{
|
|
struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
|
|
struct ls_pcie_ep *pcie = to_ls_pcie_ep(pci);
|
|
struct dw_pcie_ep_func *ep_func;
|
|
enum pci_barno bar;
|
|
|
|
ep_func = dw_pcie_ep_get_func_from_ep(ep, 0);
|
|
if (!ep_func)
|
|
return;
|
|
|
|
for (bar = 0; bar < PCI_STD_NUM_BARS; bar++)
|
|
dw_pcie_ep_reset_bar(pci, bar);
|
|
|
|
pcie->ls_epc->msi_capable = ep_func->msi_cap ? true : false;
|
|
pcie->ls_epc->msix_capable = ep_func->msix_cap ? true : false;
|
|
}
|
|
|
|
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_doorbell(ep, func_no,
|
|
interrupt_num);
|
|
default:
|
|
dev_err(pci->dev, "UNKNOWN IRQ type\n");
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
static unsigned int ls_pcie_ep_func_conf_select(struct dw_pcie_ep *ep,
|
|
u8 func_no)
|
|
{
|
|
struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
|
|
struct ls_pcie_ep *pcie = to_ls_pcie_ep(pci);
|
|
|
|
WARN_ON(func_no && !pcie->drvdata->func_offset);
|
|
return pcie->drvdata->func_offset * func_no;
|
|
}
|
|
|
|
static const struct dw_pcie_ep_ops ls_pcie_ep_ops = {
|
|
.ep_init = ls_pcie_ep_init,
|
|
.raise_irq = ls_pcie_ep_raise_irq,
|
|
.get_features = ls_pcie_ep_get_features,
|
|
.func_conf_select = ls_pcie_ep_func_conf_select,
|
|
};
|
|
|
|
static const struct ls_pcie_ep_drvdata ls1_ep_drvdata = {
|
|
.ops = &ls_pcie_ep_ops,
|
|
.dw_pcie_ops = &dw_ls_pcie_ep_ops,
|
|
};
|
|
|
|
static const struct ls_pcie_ep_drvdata ls2_ep_drvdata = {
|
|
.func_offset = 0x20000,
|
|
.ops = &ls_pcie_ep_ops,
|
|
.dw_pcie_ops = &dw_ls_pcie_ep_ops,
|
|
};
|
|
|
|
static const struct ls_pcie_ep_drvdata lx2_ep_drvdata = {
|
|
.func_offset = 0x8000,
|
|
.ops = &ls_pcie_ep_ops,
|
|
.dw_pcie_ops = &dw_ls_pcie_ep_ops,
|
|
};
|
|
|
|
static const struct of_device_id ls_pcie_ep_of_match[] = {
|
|
{ .compatible = "fsl,ls1046a-pcie-ep", .data = &ls1_ep_drvdata },
|
|
{ .compatible = "fsl,ls1088a-pcie-ep", .data = &ls2_ep_drvdata },
|
|
{ .compatible = "fsl,ls2088a-pcie-ep", .data = &ls2_ep_drvdata },
|
|
{ .compatible = "fsl,lx2160ar2-pcie-ep", .data = &lx2_ep_drvdata },
|
|
{ },
|
|
};
|
|
|
|
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 pci_epc_features *ls_epc;
|
|
struct resource *dbi_base;
|
|
|
|
pcie = devm_kzalloc(dev, sizeof(*pcie), GFP_KERNEL);
|
|
if (!pcie)
|
|
return -ENOMEM;
|
|
|
|
pci = devm_kzalloc(dev, sizeof(*pci), GFP_KERNEL);
|
|
if (!pci)
|
|
return -ENOMEM;
|
|
|
|
ls_epc = devm_kzalloc(dev, sizeof(*ls_epc), GFP_KERNEL);
|
|
if (!ls_epc)
|
|
return -ENOMEM;
|
|
|
|
pcie->drvdata = of_device_get_match_data(dev);
|
|
|
|
pci->dev = dev;
|
|
pci->ops = pcie->drvdata->dw_pcie_ops;
|
|
|
|
ls_epc->bar_fixed_64bit = (1 << BAR_2) | (1 << BAR_4);
|
|
|
|
pcie->pci = pci;
|
|
pcie->ls_epc = ls_epc;
|
|
|
|
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->ep.ops = &ls_pcie_ep_ops;
|
|
|
|
platform_set_drvdata(pdev, pcie);
|
|
|
|
return dw_pcie_ep_init(&pci->ep);
|
|
}
|
|
|
|
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);
|