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Ray Jui1fb37a82015-04-08 11:21:35 -07001/*
2 * Copyright (C) 2015 Broadcom Corporation
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License as
6 * published by the Free Software Foundation version 2.
7 *
8 * This program is distributed "as is" WITHOUT ANY WARRANTY of any
9 * kind, whether express or implied; without even the implied warranty
10 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
12 */
13
14#include <linux/kernel.h>
15#include <linux/pci.h>
16#include <linux/clk.h>
17#include <linux/module.h>
18#include <linux/slab.h>
19#include <linux/interrupt.h>
20#include <linux/platform_device.h>
21#include <linux/of_address.h>
22#include <linux/of_pci.h>
23#include <linux/of_irq.h>
24#include <linux/of_platform.h>
25#include <linux/phy/phy.h>
26
27#include "pcie-iproc.h"
28
Ray Jui943ebae2015-12-04 09:34:59 -080029static const struct of_device_id iproc_pcie_of_match_table[] = {
30 {
31 .compatible = "brcm,iproc-pcie",
32 .data = (int *)IPROC_PCIE_PAXB,
33 }, {
Ray Juic7c44522016-10-31 17:38:41 -070034 .compatible = "brcm,iproc-pcie-paxb-v2",
35 .data = (int *)IPROC_PCIE_PAXB_V2,
36 }, {
Ray Jui943ebae2015-12-04 09:34:59 -080037 .compatible = "brcm,iproc-pcie-paxc",
38 .data = (int *)IPROC_PCIE_PAXC,
Ray Jui787b3c42016-10-31 17:38:35 -070039 }, {
40 .compatible = "brcm,iproc-pcie-paxc-v2",
41 .data = (int *)IPROC_PCIE_PAXC_V2,
Ray Jui943ebae2015-12-04 09:34:59 -080042 },
43 { /* sentinel */ }
44};
45MODULE_DEVICE_TABLE(of, iproc_pcie_of_match_table);
46
Ray Jui1fb37a82015-04-08 11:21:35 -070047static int iproc_pcie_pltfm_probe(struct platform_device *pdev)
48{
Bjorn Helgaas786aecc2016-10-06 13:36:08 -050049 struct device *dev = &pdev->dev;
Ray Jui943ebae2015-12-04 09:34:59 -080050 const struct of_device_id *of_id;
Ray Jui1fb37a82015-04-08 11:21:35 -070051 struct iproc_pcie *pcie;
Bjorn Helgaas786aecc2016-10-06 13:36:08 -050052 struct device_node *np = dev->of_node;
Ray Jui1fb37a82015-04-08 11:21:35 -070053 struct resource reg;
54 resource_size_t iobase = 0;
55 LIST_HEAD(res);
56 int ret;
57
Bjorn Helgaas786aecc2016-10-06 13:36:08 -050058 of_id = of_match_device(iproc_pcie_of_match_table, dev);
Ray Jui943ebae2015-12-04 09:34:59 -080059 if (!of_id)
60 return -EINVAL;
61
Bjorn Helgaas786aecc2016-10-06 13:36:08 -050062 pcie = devm_kzalloc(dev, sizeof(*pcie), GFP_KERNEL);
Ray Jui1fb37a82015-04-08 11:21:35 -070063 if (!pcie)
64 return -ENOMEM;
65
Bjorn Helgaas786aecc2016-10-06 13:36:08 -050066 pcie->dev = dev;
Ray Jui943ebae2015-12-04 09:34:59 -080067 pcie->type = (enum iproc_pcie_type)of_id->data;
Ray Jui1fb37a82015-04-08 11:21:35 -070068
69 ret = of_address_to_resource(np, 0, &reg);
70 if (ret < 0) {
Bjorn Helgaas786aecc2016-10-06 13:36:08 -050071 dev_err(dev, "unable to obtain controller resources\n");
Ray Jui1fb37a82015-04-08 11:21:35 -070072 return ret;
73 }
74
Bjorn Helgaas786aecc2016-10-06 13:36:08 -050075 pcie->base = devm_ioremap(dev, reg.start, resource_size(&reg));
Ray Jui1fb37a82015-04-08 11:21:35 -070076 if (!pcie->base) {
Bjorn Helgaas786aecc2016-10-06 13:36:08 -050077 dev_err(dev, "unable to map controller registers\n");
Ray Jui1fb37a82015-04-08 11:21:35 -070078 return -ENOMEM;
79 }
Ray Jui3bc2b232016-01-06 18:04:35 -060080 pcie->base_addr = reg.start;
Ray Jui1fb37a82015-04-08 11:21:35 -070081
Ray Juie99a1872015-10-16 08:18:24 -050082 if (of_property_read_bool(np, "brcm,pcie-ob")) {
83 u32 val;
84
85 ret = of_property_read_u32(np, "brcm,pcie-ob-axi-offset",
86 &val);
87 if (ret) {
Bjorn Helgaas786aecc2016-10-06 13:36:08 -050088 dev_err(dev,
Ray Juie99a1872015-10-16 08:18:24 -050089 "missing brcm,pcie-ob-axi-offset property\n");
90 return ret;
91 }
92 pcie->ob.axi_offset = val;
Ray Juie99a1872015-10-16 08:18:24 -050093 pcie->need_ob_cfg = true;
94 }
95
Ray Jui1fb37a82015-04-08 11:21:35 -070096 /* PHY use is optional */
Bjorn Helgaas786aecc2016-10-06 13:36:08 -050097 pcie->phy = devm_phy_get(dev, "pcie-phy");
Ray Jui1fb37a82015-04-08 11:21:35 -070098 if (IS_ERR(pcie->phy)) {
99 if (PTR_ERR(pcie->phy) == -EPROBE_DEFER)
100 return -EPROBE_DEFER;
101 pcie->phy = NULL;
102 }
103
104 ret = of_pci_get_host_bridge_resources(np, 0, 0xff, &res, &iobase);
105 if (ret) {
Bjorn Helgaas786aecc2016-10-06 13:36:08 -0500106 dev_err(dev,
Ray Jui1fb37a82015-04-08 11:21:35 -0700107 "unable to get PCI host bridge resources\n");
108 return ret;
109 }
110
Andy Gospodarekffbd7962016-12-01 15:34:52 -0500111 /* PAXC doesn't support legacy IRQs, skip mapping */
112 switch (pcie->type) {
113 case IPROC_PCIE_PAXC:
114 case IPROC_PCIE_PAXC_V2:
115 break;
116 default:
117 pcie->map_irq = of_irq_parse_and_map_pci;
118 }
Hauke Mehrtensc1e02ce2015-05-12 23:23:00 +0200119
Hauke Mehrtens18c43422015-05-24 22:37:02 +0200120 ret = iproc_pcie_setup(pcie, &res);
Hauke Mehrtensef079912015-05-24 22:37:03 +0200121 if (ret)
Bjorn Helgaas786aecc2016-10-06 13:36:08 -0500122 dev_err(dev, "PCIe controller setup failed\n");
Ray Jui1fb37a82015-04-08 11:21:35 -0700123
Hauke Mehrtensef079912015-05-24 22:37:03 +0200124 pci_free_resource_list(&res);
125
Bjorn Helgaas556c7bb2016-10-06 13:36:08 -0500126 platform_set_drvdata(pdev, pcie);
Hauke Mehrtensef079912015-05-24 22:37:03 +0200127 return ret;
Ray Jui1fb37a82015-04-08 11:21:35 -0700128}
129
130static int iproc_pcie_pltfm_remove(struct platform_device *pdev)
131{
132 struct iproc_pcie *pcie = platform_get_drvdata(pdev);
133
134 return iproc_pcie_remove(pcie);
135}
136
Ray Jui1fb37a82015-04-08 11:21:35 -0700137static struct platform_driver iproc_pcie_pltfm_driver = {
138 .driver = {
139 .name = "iproc-pcie",
140 .of_match_table = of_match_ptr(iproc_pcie_of_match_table),
141 },
142 .probe = iproc_pcie_pltfm_probe,
143 .remove = iproc_pcie_pltfm_remove,
144};
145module_platform_driver(iproc_pcie_pltfm_driver);
146
147MODULE_AUTHOR("Ray Jui <rjui@broadcom.com>");
148MODULE_DESCRIPTION("Broadcom iPROC PCIe platform driver");
149MODULE_LICENSE("GPL v2");