147 lines
3.6 KiB
C
147 lines
3.6 KiB
C
/*
|
|
* Copyright (C) 2015 Broadcom Corporation
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License as
|
|
* published by the Free Software Foundation version 2.
|
|
*
|
|
* This program is distributed "as is" WITHOUT ANY WARRANTY of any
|
|
* kind, whether express or implied; without even the implied warranty
|
|
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/pci.h>
|
|
#include <linux/clk.h>
|
|
#include <linux/module.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/of_address.h>
|
|
#include <linux/of_pci.h>
|
|
#include <linux/of_irq.h>
|
|
#include <linux/of_platform.h>
|
|
#include <linux/phy/phy.h>
|
|
|
|
#include "pcie-iproc.h"
|
|
|
|
static const struct of_device_id iproc_pcie_of_match_table[] = {
|
|
{
|
|
.compatible = "brcm,iproc-pcie",
|
|
.data = (int *)IPROC_PCIE_PAXB,
|
|
}, {
|
|
.compatible = "brcm,iproc-pcie-paxb-v2",
|
|
.data = (int *)IPROC_PCIE_PAXB_V2,
|
|
}, {
|
|
.compatible = "brcm,iproc-pcie-paxc",
|
|
.data = (int *)IPROC_PCIE_PAXC,
|
|
}, {
|
|
.compatible = "brcm,iproc-pcie-paxc-v2",
|
|
.data = (int *)IPROC_PCIE_PAXC_V2,
|
|
},
|
|
{ /* sentinel */ }
|
|
};
|
|
MODULE_DEVICE_TABLE(of, iproc_pcie_of_match_table);
|
|
|
|
static int iproc_pcie_pltfm_probe(struct platform_device *pdev)
|
|
{
|
|
struct device *dev = &pdev->dev;
|
|
struct iproc_pcie *pcie;
|
|
struct device_node *np = dev->of_node;
|
|
struct resource reg;
|
|
resource_size_t iobase = 0;
|
|
LIST_HEAD(resources);
|
|
int ret;
|
|
|
|
pcie = devm_kzalloc(dev, sizeof(*pcie), GFP_KERNEL);
|
|
if (!pcie)
|
|
return -ENOMEM;
|
|
|
|
pcie->dev = dev;
|
|
pcie->type = (enum iproc_pcie_type) of_device_get_match_data(dev);
|
|
|
|
ret = of_address_to_resource(np, 0, ®);
|
|
if (ret < 0) {
|
|
dev_err(dev, "unable to obtain controller resources\n");
|
|
return ret;
|
|
}
|
|
|
|
pcie->base = devm_pci_remap_cfgspace(dev, reg.start,
|
|
resource_size(®));
|
|
if (!pcie->base) {
|
|
dev_err(dev, "unable to map controller registers\n");
|
|
return -ENOMEM;
|
|
}
|
|
pcie->base_addr = reg.start;
|
|
|
|
if (of_property_read_bool(np, "brcm,pcie-ob")) {
|
|
u32 val;
|
|
|
|
ret = of_property_read_u32(np, "brcm,pcie-ob-axi-offset",
|
|
&val);
|
|
if (ret) {
|
|
dev_err(dev,
|
|
"missing brcm,pcie-ob-axi-offset property\n");
|
|
return ret;
|
|
}
|
|
pcie->ob.axi_offset = val;
|
|
pcie->need_ob_cfg = true;
|
|
}
|
|
|
|
/* PHY use is optional */
|
|
pcie->phy = devm_phy_get(dev, "pcie-phy");
|
|
if (IS_ERR(pcie->phy)) {
|
|
if (PTR_ERR(pcie->phy) == -EPROBE_DEFER)
|
|
return -EPROBE_DEFER;
|
|
pcie->phy = NULL;
|
|
}
|
|
|
|
ret = of_pci_get_host_bridge_resources(np, 0, 0xff, &resources,
|
|
&iobase);
|
|
if (ret) {
|
|
dev_err(dev, "unable to get PCI host bridge resources\n");
|
|
return ret;
|
|
}
|
|
|
|
/* PAXC doesn't support legacy IRQs, skip mapping */
|
|
switch (pcie->type) {
|
|
case IPROC_PCIE_PAXC:
|
|
case IPROC_PCIE_PAXC_V2:
|
|
break;
|
|
default:
|
|
pcie->map_irq = of_irq_parse_and_map_pci;
|
|
}
|
|
|
|
ret = iproc_pcie_setup(pcie, &resources);
|
|
if (ret) {
|
|
dev_err(dev, "PCIe controller setup failed\n");
|
|
pci_free_resource_list(&resources);
|
|
return ret;
|
|
}
|
|
|
|
platform_set_drvdata(pdev, pcie);
|
|
return 0;
|
|
}
|
|
|
|
static int iproc_pcie_pltfm_remove(struct platform_device *pdev)
|
|
{
|
|
struct iproc_pcie *pcie = platform_get_drvdata(pdev);
|
|
|
|
return iproc_pcie_remove(pcie);
|
|
}
|
|
|
|
static struct platform_driver iproc_pcie_pltfm_driver = {
|
|
.driver = {
|
|
.name = "iproc-pcie",
|
|
.of_match_table = of_match_ptr(iproc_pcie_of_match_table),
|
|
},
|
|
.probe = iproc_pcie_pltfm_probe,
|
|
.remove = iproc_pcie_pltfm_remove,
|
|
};
|
|
module_platform_driver(iproc_pcie_pltfm_driver);
|
|
|
|
MODULE_AUTHOR("Ray Jui <rjui@broadcom.com>");
|
|
MODULE_DESCRIPTION("Broadcom iPROC PCIe platform driver");
|
|
MODULE_LICENSE("GPL v2");
|