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/*
* 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;
const struct of_device_id *of_id;
struct iproc_pcie *pcie;
struct device_node *np = dev->of_node;
struct resource reg;
resource_size_t iobase = 0;
LIST_HEAD(res);
int ret;
of_id = of_match_device(iproc_pcie_of_match_table, dev);
if (!of_id)
return -EINVAL;
pcie = devm_kzalloc(dev, sizeof(*pcie), GFP_KERNEL);
if (!pcie)
return -ENOMEM;
pcie->dev = dev;
pcie->type = (enum iproc_pcie_type)of_id->data;
ret = of_address_to_resource(np, 0, ®);
if (ret < 0) {
dev_err(dev, "unable to obtain controller resources\n");
return ret;
}
pcie->base = devm_ioremap(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, &res, &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, &res);
if (ret)
dev_err(dev, "PCIe controller setup failed\n");
pci_free_resource_list(&res);
platform_set_drvdata(pdev, pcie);
return ret;
}
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");
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