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1fb37a81 RJ |
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 | ||
943ebae7 RJ |
29 | static const struct of_device_id iproc_pcie_of_match_table[] = { |
30 | { | |
31 | .compatible = "brcm,iproc-pcie", | |
32 | .data = (int *)IPROC_PCIE_PAXB, | |
c7c44527 RJ |
33 | }, { |
34 | .compatible = "brcm,iproc-pcie-paxb-v2", | |
35 | .data = (int *)IPROC_PCIE_PAXB_V2, | |
943ebae7 RJ |
36 | }, { |
37 | .compatible = "brcm,iproc-pcie-paxc", | |
38 | .data = (int *)IPROC_PCIE_PAXC, | |
787b3c4f RJ |
39 | }, { |
40 | .compatible = "brcm,iproc-pcie-paxc-v2", | |
41 | .data = (int *)IPROC_PCIE_PAXC_V2, | |
943ebae7 RJ |
42 | }, |
43 | { /* sentinel */ } | |
44 | }; | |
45 | MODULE_DEVICE_TABLE(of, iproc_pcie_of_match_table); | |
46 | ||
1fb37a81 RJ |
47 | static int iproc_pcie_pltfm_probe(struct platform_device *pdev) |
48 | { | |
786aeccb | 49 | struct device *dev = &pdev->dev; |
1fb37a81 | 50 | struct iproc_pcie *pcie; |
786aeccb | 51 | struct device_node *np = dev->of_node; |
1fb37a81 RJ |
52 | struct resource reg; |
53 | resource_size_t iobase = 0; | |
6e347b5e | 54 | LIST_HEAD(resources); |
52774076 | 55 | struct pci_host_bridge *bridge; |
1fb37a81 RJ |
56 | int ret; |
57 | ||
52774076 LP |
58 | bridge = devm_pci_alloc_host_bridge(dev, sizeof(*pcie)); |
59 | if (!bridge) | |
1fb37a81 RJ |
60 | return -ENOMEM; |
61 | ||
52774076 LP |
62 | pcie = pci_host_bridge_priv(bridge); |
63 | ||
786aeccb | 64 | pcie->dev = dev; |
e5c3b3e9 | 65 | pcie->type = (enum iproc_pcie_type) of_device_get_match_data(dev); |
1fb37a81 RJ |
66 | |
67 | ret = of_address_to_resource(np, 0, ®); | |
68 | if (ret < 0) { | |
786aeccb | 69 | dev_err(dev, "unable to obtain controller resources\n"); |
1fb37a81 RJ |
70 | return ret; |
71 | } | |
72 | ||
868564da LP |
73 | pcie->base = devm_pci_remap_cfgspace(dev, reg.start, |
74 | resource_size(®)); | |
1fb37a81 | 75 | if (!pcie->base) { |
786aeccb | 76 | dev_err(dev, "unable to map controller registers\n"); |
1fb37a81 RJ |
77 | return -ENOMEM; |
78 | } | |
3bc2b234 | 79 | pcie->base_addr = reg.start; |
1fb37a81 | 80 | |
e99a187b RJ |
81 | if (of_property_read_bool(np, "brcm,pcie-ob")) { |
82 | u32 val; | |
83 | ||
84 | ret = of_property_read_u32(np, "brcm,pcie-ob-axi-offset", | |
85 | &val); | |
86 | if (ret) { | |
786aeccb | 87 | dev_err(dev, |
e99a187b RJ |
88 | "missing brcm,pcie-ob-axi-offset property\n"); |
89 | return ret; | |
90 | } | |
91 | pcie->ob.axi_offset = val; | |
e99a187b RJ |
92 | pcie->need_ob_cfg = true; |
93 | } | |
94 | ||
9bc8d811 RJ |
95 | /* |
96 | * DT nodes are not used by all platforms that use the iProc PCIe | |
97 | * core driver. For platforms that require explict inbound mapping | |
98 | * configuration, "dma-ranges" would have been present in DT | |
99 | */ | |
100 | pcie->need_ib_cfg = of_property_read_bool(np, "dma-ranges"); | |
101 | ||
1fb37a81 | 102 | /* PHY use is optional */ |
786aeccb | 103 | pcie->phy = devm_phy_get(dev, "pcie-phy"); |
1fb37a81 RJ |
104 | if (IS_ERR(pcie->phy)) { |
105 | if (PTR_ERR(pcie->phy) == -EPROBE_DEFER) | |
106 | return -EPROBE_DEFER; | |
107 | pcie->phy = NULL; | |
108 | } | |
109 | ||
6e347b5e BH |
110 | ret = of_pci_get_host_bridge_resources(np, 0, 0xff, &resources, |
111 | &iobase); | |
1fb37a81 | 112 | if (ret) { |
6e347b5e | 113 | dev_err(dev, "unable to get PCI host bridge resources\n"); |
1fb37a81 RJ |
114 | return ret; |
115 | } | |
116 | ||
ffbd7968 AG |
117 | /* PAXC doesn't support legacy IRQs, skip mapping */ |
118 | switch (pcie->type) { | |
119 | case IPROC_PCIE_PAXC: | |
120 | case IPROC_PCIE_PAXC_V2: | |
121 | break; | |
122 | default: | |
123 | pcie->map_irq = of_irq_parse_and_map_pci; | |
124 | } | |
c1e02cea | 125 | |
6e347b5e BH |
126 | ret = iproc_pcie_setup(pcie, &resources); |
127 | if (ret) { | |
786aeccb | 128 | dev_err(dev, "PCIe controller setup failed\n"); |
6e347b5e BH |
129 | pci_free_resource_list(&resources); |
130 | return ret; | |
131 | } | |
ef07991a | 132 | |
556c7bb7 | 133 | platform_set_drvdata(pdev, pcie); |
6e347b5e | 134 | return 0; |
1fb37a81 RJ |
135 | } |
136 | ||
137 | static int iproc_pcie_pltfm_remove(struct platform_device *pdev) | |
138 | { | |
139 | struct iproc_pcie *pcie = platform_get_drvdata(pdev); | |
140 | ||
141 | return iproc_pcie_remove(pcie); | |
142 | } | |
143 | ||
b91c26c6 OP |
144 | static void iproc_pcie_pltfm_shutdown(struct platform_device *pdev) |
145 | { | |
146 | struct iproc_pcie *pcie = platform_get_drvdata(pdev); | |
147 | ||
148 | iproc_pcie_shutdown(pcie); | |
149 | } | |
150 | ||
1fb37a81 RJ |
151 | static struct platform_driver iproc_pcie_pltfm_driver = { |
152 | .driver = { | |
153 | .name = "iproc-pcie", | |
154 | .of_match_table = of_match_ptr(iproc_pcie_of_match_table), | |
155 | }, | |
156 | .probe = iproc_pcie_pltfm_probe, | |
157 | .remove = iproc_pcie_pltfm_remove, | |
b91c26c6 | 158 | .shutdown = iproc_pcie_pltfm_shutdown, |
1fb37a81 RJ |
159 | }; |
160 | module_platform_driver(iproc_pcie_pltfm_driver); | |
161 | ||
162 | MODULE_AUTHOR("Ray Jui <rjui@broadcom.com>"); | |
163 | MODULE_DESCRIPTION("Broadcom iPROC PCIe platform driver"); | |
164 | MODULE_LICENSE("GPL v2"); |