]> git.kernelconcepts.de Git - karo-tx-linux.git/blob - drivers/pci/host/pcie-iproc-platform.c
Merge branch 'pci/host-layerscape' into next
[karo-tx-linux.git] / drivers / pci / host / pcie-iproc-platform.c
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
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, &reg);
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(&reg));
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
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");