1 /*
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
iproc_pcie_pltfm_probe(struct platform_device * pdev)29 static int iproc_pcie_pltfm_probe(struct platform_device *pdev)
30 {
31 struct iproc_pcie *pcie;
32 struct device_node *np = pdev->dev.of_node;
33 struct resource reg;
34 resource_size_t iobase = 0;
35 LIST_HEAD(res);
36 int ret;
37
38 pcie = devm_kzalloc(&pdev->dev, sizeof(struct iproc_pcie), GFP_KERNEL);
39 if (!pcie)
40 return -ENOMEM;
41
42 pcie->dev = &pdev->dev;
43 platform_set_drvdata(pdev, pcie);
44
45 ret = of_address_to_resource(np, 0, ®);
46 if (ret < 0) {
47 dev_err(pcie->dev, "unable to obtain controller resources\n");
48 return ret;
49 }
50
51 pcie->base = devm_ioremap(pcie->dev, reg.start, resource_size(®));
52 if (!pcie->base) {
53 dev_err(pcie->dev, "unable to map controller registers\n");
54 return -ENOMEM;
55 }
56
57 if (of_property_read_bool(np, "brcm,pcie-ob")) {
58 u32 val;
59
60 ret = of_property_read_u32(np, "brcm,pcie-ob-axi-offset",
61 &val);
62 if (ret) {
63 dev_err(pcie->dev,
64 "missing brcm,pcie-ob-axi-offset property\n");
65 return ret;
66 }
67 pcie->ob.axi_offset = val;
68
69 ret = of_property_read_u32(np, "brcm,pcie-ob-window-size",
70 &val);
71 if (ret) {
72 dev_err(pcie->dev,
73 "missing brcm,pcie-ob-window-size property\n");
74 return ret;
75 }
76 pcie->ob.window_size = (resource_size_t)val * SZ_1M;
77
78 if (of_property_read_bool(np, "brcm,pcie-ob-oarr-size"))
79 pcie->ob.set_oarr_size = true;
80
81 pcie->need_ob_cfg = true;
82 }
83
84 /* PHY use is optional */
85 pcie->phy = devm_phy_get(&pdev->dev, "pcie-phy");
86 if (IS_ERR(pcie->phy)) {
87 if (PTR_ERR(pcie->phy) == -EPROBE_DEFER)
88 return -EPROBE_DEFER;
89 pcie->phy = NULL;
90 }
91
92 ret = of_pci_get_host_bridge_resources(np, 0, 0xff, &res, &iobase);
93 if (ret) {
94 dev_err(pcie->dev,
95 "unable to get PCI host bridge resources\n");
96 return ret;
97 }
98
99 pcie->map_irq = of_irq_parse_and_map_pci;
100
101 ret = iproc_pcie_setup(pcie, &res);
102 if (ret)
103 dev_err(pcie->dev, "PCIe controller setup failed\n");
104
105 pci_free_resource_list(&res);
106
107 return ret;
108 }
109
iproc_pcie_pltfm_remove(struct platform_device * pdev)110 static int iproc_pcie_pltfm_remove(struct platform_device *pdev)
111 {
112 struct iproc_pcie *pcie = platform_get_drvdata(pdev);
113
114 return iproc_pcie_remove(pcie);
115 }
116
117 static const struct of_device_id iproc_pcie_of_match_table[] = {
118 { .compatible = "brcm,iproc-pcie", },
119 { /* sentinel */ }
120 };
121 MODULE_DEVICE_TABLE(of, iproc_pcie_of_match_table);
122
123 static struct platform_driver iproc_pcie_pltfm_driver = {
124 .driver = {
125 .name = "iproc-pcie",
126 .of_match_table = of_match_ptr(iproc_pcie_of_match_table),
127 },
128 .probe = iproc_pcie_pltfm_probe,
129 .remove = iproc_pcie_pltfm_remove,
130 };
131 module_platform_driver(iproc_pcie_pltfm_driver);
132
133 MODULE_AUTHOR("Ray Jui <rjui@broadcom.com>");
134 MODULE_DESCRIPTION("Broadcom iPROC PCIe platform driver");
135 MODULE_LICENSE("GPL v2");
136