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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (C) 2015 Broadcom Corporation
4 */
5
6#include <linux/kernel.h>
7#include <linux/pci.h>
8#include <linux/clk.h>
9#include <linux/module.h>
10#include <linux/slab.h>
11#include <linux/interrupt.h>
12#include <linux/platform_device.h>
13#include <linux/of_address.h>
14#include <linux/of_pci.h>
15#include <linux/of_platform.h>
16#include <linux/phy/phy.h>
17
18#include "../pci.h"
19#include "pcie-iproc.h"
20
21static const struct of_device_id iproc_pcie_of_match_table[] = {
22 {
23 .compatible = "brcm,iproc-pcie",
24 .data = (int *)IPROC_PCIE_PAXB,
25 }, {
26 .compatible = "brcm,iproc-pcie-paxb-v2",
27 .data = (int *)IPROC_PCIE_PAXB_V2,
28 }, {
29 .compatible = "brcm,iproc-pcie-paxc",
30 .data = (int *)IPROC_PCIE_PAXC,
31 }, {
32 .compatible = "brcm,iproc-pcie-paxc-v2",
33 .data = (int *)IPROC_PCIE_PAXC_V2,
34 },
35 { /* sentinel */ }
36};
37MODULE_DEVICE_TABLE(of, iproc_pcie_of_match_table);
38
39static int iproc_pltfm_pcie_probe(struct platform_device *pdev)
40{
41 struct device *dev = &pdev->dev;
42 struct iproc_pcie *pcie;
43 struct device_node *np = dev->of_node;
44 struct resource reg;
45 struct pci_host_bridge *bridge;
46 int ret;
47
48 bridge = devm_pci_alloc_host_bridge(dev, sizeof(*pcie));
49 if (!bridge)
50 return -ENOMEM;
51
52 pcie = pci_host_bridge_priv(bridge);
53
54 pcie->dev = dev;
55 pcie->type = (uintptr_t)of_device_get_match_data(dev);
56
57 ret = of_address_to_resource(np, 0, ®);
58 if (ret < 0) {
59 dev_err(dev, "unable to obtain controller resources\n");
60 return ret;
61 }
62
63 pcie->base = devm_pci_remap_cfgspace(dev, reg.start,
64 resource_size(®));
65 if (!pcie->base) {
66 dev_err(dev, "unable to map controller registers\n");
67 return -ENOMEM;
68 }
69 pcie->base_addr = reg.start;
70
71 if (of_property_read_bool(np, "brcm,pcie-ob")) {
72 u32 val;
73
74 ret = of_property_read_u32(np, "brcm,pcie-ob-axi-offset",
75 &val);
76 if (ret) {
77 dev_err(dev,
78 "missing brcm,pcie-ob-axi-offset property\n");
79 return ret;
80 }
81 pcie->ob.axi_offset = val;
82 pcie->need_ob_cfg = true;
83 }
84
85 /*
86 * DT nodes are not used by all platforms that use the iProc PCIe
87 * core driver. For platforms that require explicit inbound mapping
88 * configuration, "dma-ranges" would have been present in DT
89 */
90 pcie->need_ib_cfg = of_property_read_bool(np, "dma-ranges");
91
92 /* PHY use is optional */
93 pcie->phy = devm_phy_optional_get(dev, "pcie-phy");
94 if (IS_ERR(pcie->phy))
95 return PTR_ERR(pcie->phy);
96
97 /* PAXC doesn't support legacy IRQs, skip mapping */
98 switch (pcie->type) {
99 case IPROC_PCIE_PAXC:
100 case IPROC_PCIE_PAXC_V2:
101 pcie->map_irq = NULL;
102 break;
103 default:
104 break;
105 }
106
107 ret = iproc_pcie_setup(pcie, &bridge->windows);
108 if (ret) {
109 dev_err(dev, "PCIe controller setup failed\n");
110 return ret;
111 }
112
113 platform_set_drvdata(pdev, pcie);
114 return 0;
115}
116
117static void iproc_pltfm_pcie_remove(struct platform_device *pdev)
118{
119 struct iproc_pcie *pcie = platform_get_drvdata(pdev);
120
121 iproc_pcie_remove(pcie);
122}
123
124static void iproc_pltfm_pcie_shutdown(struct platform_device *pdev)
125{
126 struct iproc_pcie *pcie = platform_get_drvdata(pdev);
127
128 iproc_pcie_shutdown(pcie);
129}
130
131static struct platform_driver iproc_pltfm_pcie_driver = {
132 .driver = {
133 .name = "iproc-pcie",
134 .of_match_table = of_match_ptr(iproc_pcie_of_match_table),
135 },
136 .probe = iproc_pltfm_pcie_probe,
137 .remove = iproc_pltfm_pcie_remove,
138 .shutdown = iproc_pltfm_pcie_shutdown,
139};
140module_platform_driver(iproc_pltfm_pcie_driver);
141
142MODULE_AUTHOR("Ray Jui <rjui@broadcom.com>");
143MODULE_DESCRIPTION("Broadcom iPROC PCIe platform driver");
144MODULE_LICENSE("GPL v2");
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (C) 2015 Broadcom Corporation
4 */
5
6#include <linux/kernel.h>
7#include <linux/pci.h>
8#include <linux/clk.h>
9#include <linux/module.h>
10#include <linux/slab.h>
11#include <linux/interrupt.h>
12#include <linux/platform_device.h>
13#include <linux/of_address.h>
14#include <linux/of_pci.h>
15#include <linux/of_irq.h>
16#include <linux/of_platform.h>
17#include <linux/phy/phy.h>
18
19#include "../pci.h"
20#include "pcie-iproc.h"
21
22static const struct of_device_id iproc_pcie_of_match_table[] = {
23 {
24 .compatible = "brcm,iproc-pcie",
25 .data = (int *)IPROC_PCIE_PAXB,
26 }, {
27 .compatible = "brcm,iproc-pcie-paxb-v2",
28 .data = (int *)IPROC_PCIE_PAXB_V2,
29 }, {
30 .compatible = "brcm,iproc-pcie-paxc",
31 .data = (int *)IPROC_PCIE_PAXC,
32 }, {
33 .compatible = "brcm,iproc-pcie-paxc-v2",
34 .data = (int *)IPROC_PCIE_PAXC_V2,
35 },
36 { /* sentinel */ }
37};
38MODULE_DEVICE_TABLE(of, iproc_pcie_of_match_table);
39
40static int iproc_pcie_pltfm_probe(struct platform_device *pdev)
41{
42 struct device *dev = &pdev->dev;
43 struct iproc_pcie *pcie;
44 struct device_node *np = dev->of_node;
45 struct resource reg;
46 resource_size_t iobase = 0;
47 LIST_HEAD(resources);
48 struct pci_host_bridge *bridge;
49 int ret;
50
51 bridge = devm_pci_alloc_host_bridge(dev, sizeof(*pcie));
52 if (!bridge)
53 return -ENOMEM;
54
55 pcie = pci_host_bridge_priv(bridge);
56
57 pcie->dev = dev;
58 pcie->type = (enum iproc_pcie_type) of_device_get_match_data(dev);
59
60 ret = of_address_to_resource(np, 0, ®);
61 if (ret < 0) {
62 dev_err(dev, "unable to obtain controller resources\n");
63 return ret;
64 }
65
66 pcie->base = devm_pci_remap_cfgspace(dev, reg.start,
67 resource_size(®));
68 if (!pcie->base) {
69 dev_err(dev, "unable to map controller registers\n");
70 return -ENOMEM;
71 }
72 pcie->base_addr = reg.start;
73
74 if (of_property_read_bool(np, "brcm,pcie-ob")) {
75 u32 val;
76
77 ret = of_property_read_u32(np, "brcm,pcie-ob-axi-offset",
78 &val);
79 if (ret) {
80 dev_err(dev,
81 "missing brcm,pcie-ob-axi-offset property\n");
82 return ret;
83 }
84 pcie->ob.axi_offset = val;
85 pcie->need_ob_cfg = true;
86 }
87
88 /*
89 * DT nodes are not used by all platforms that use the iProc PCIe
90 * core driver. For platforms that require explicit inbound mapping
91 * configuration, "dma-ranges" would have been present in DT
92 */
93 pcie->need_ib_cfg = of_property_read_bool(np, "dma-ranges");
94
95 /* PHY use is optional */
96 pcie->phy = devm_phy_optional_get(dev, "pcie-phy");
97 if (IS_ERR(pcie->phy))
98 return PTR_ERR(pcie->phy);
99
100 ret = devm_of_pci_get_host_bridge_resources(dev, 0, 0xff, &resources,
101 &iobase);
102 if (ret) {
103 dev_err(dev, "unable to get PCI host bridge resources\n");
104 return ret;
105 }
106
107 /* PAXC doesn't support legacy IRQs, skip mapping */
108 switch (pcie->type) {
109 case IPROC_PCIE_PAXC:
110 case IPROC_PCIE_PAXC_V2:
111 break;
112 default:
113 pcie->map_irq = of_irq_parse_and_map_pci;
114 }
115
116 ret = iproc_pcie_setup(pcie, &resources);
117 if (ret) {
118 dev_err(dev, "PCIe controller setup failed\n");
119 pci_free_resource_list(&resources);
120 return ret;
121 }
122
123 platform_set_drvdata(pdev, pcie);
124 return 0;
125}
126
127static int iproc_pcie_pltfm_remove(struct platform_device *pdev)
128{
129 struct iproc_pcie *pcie = platform_get_drvdata(pdev);
130
131 return iproc_pcie_remove(pcie);
132}
133
134static void iproc_pcie_pltfm_shutdown(struct platform_device *pdev)
135{
136 struct iproc_pcie *pcie = platform_get_drvdata(pdev);
137
138 iproc_pcie_shutdown(pcie);
139}
140
141static struct platform_driver iproc_pcie_pltfm_driver = {
142 .driver = {
143 .name = "iproc-pcie",
144 .of_match_table = of_match_ptr(iproc_pcie_of_match_table),
145 },
146 .probe = iproc_pcie_pltfm_probe,
147 .remove = iproc_pcie_pltfm_remove,
148 .shutdown = iproc_pcie_pltfm_shutdown,
149};
150module_platform_driver(iproc_pcie_pltfm_driver);
151
152MODULE_AUTHOR("Ray Jui <rjui@broadcom.com>");
153MODULE_DESCRIPTION("Broadcom iPROC PCIe platform driver");
154MODULE_LICENSE("GPL v2");