2 * Copyright (C) 2015 Broadcom Corporation
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.
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.
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>
27 #include "pcie-iproc.h"
29 static const struct of_device_id iproc_pcie_of_match_table
[] = {
31 .compatible
= "brcm,iproc-pcie",
32 .data
= (int *)IPROC_PCIE_PAXB
,
34 .compatible
= "brcm,iproc-pcie-paxb-v2",
35 .data
= (int *)IPROC_PCIE_PAXB_V2
,
37 .compatible
= "brcm,iproc-pcie-paxc",
38 .data
= (int *)IPROC_PCIE_PAXC
,
40 .compatible
= "brcm,iproc-pcie-paxc-v2",
41 .data
= (int *)IPROC_PCIE_PAXC_V2
,
45 MODULE_DEVICE_TABLE(of
, iproc_pcie_of_match_table
);
47 static int iproc_pcie_pltfm_probe(struct platform_device
*pdev
)
49 struct device
*dev
= &pdev
->dev
;
50 struct iproc_pcie
*pcie
;
51 struct device_node
*np
= dev
->of_node
;
53 resource_size_t iobase
= 0;
55 struct pci_host_bridge
*bridge
;
58 bridge
= devm_pci_alloc_host_bridge(dev
, sizeof(*pcie
));
62 pcie
= pci_host_bridge_priv(bridge
);
65 pcie
->type
= (enum iproc_pcie_type
) of_device_get_match_data(dev
);
67 ret
= of_address_to_resource(np
, 0, ®
);
69 dev_err(dev
, "unable to obtain controller resources\n");
73 pcie
->base
= devm_pci_remap_cfgspace(dev
, reg
.start
,
76 dev_err(dev
, "unable to map controller registers\n");
79 pcie
->base_addr
= reg
.start
;
81 if (of_property_read_bool(np
, "brcm,pcie-ob")) {
84 ret
= of_property_read_u32(np
, "brcm,pcie-ob-axi-offset",
88 "missing brcm,pcie-ob-axi-offset property\n");
91 pcie
->ob
.axi_offset
= val
;
92 pcie
->need_ob_cfg
= true;
95 /* PHY use is optional */
96 pcie
->phy
= devm_phy_get(dev
, "pcie-phy");
97 if (IS_ERR(pcie
->phy
)) {
98 if (PTR_ERR(pcie
->phy
) == -EPROBE_DEFER
)
103 ret
= of_pci_get_host_bridge_resources(np
, 0, 0xff, &resources
,
106 dev_err(dev
, "unable to get PCI host bridge resources\n");
110 /* PAXC doesn't support legacy IRQs, skip mapping */
111 switch (pcie
->type
) {
112 case IPROC_PCIE_PAXC
:
113 case IPROC_PCIE_PAXC_V2
:
116 pcie
->map_irq
= of_irq_parse_and_map_pci
;
119 ret
= iproc_pcie_setup(pcie
, &resources
);
121 dev_err(dev
, "PCIe controller setup failed\n");
122 pci_free_resource_list(&resources
);
126 platform_set_drvdata(pdev
, pcie
);
130 static int iproc_pcie_pltfm_remove(struct platform_device
*pdev
)
132 struct iproc_pcie
*pcie
= platform_get_drvdata(pdev
);
134 return iproc_pcie_remove(pcie
);
137 static void iproc_pcie_pltfm_shutdown(struct platform_device
*pdev
)
139 struct iproc_pcie
*pcie
= platform_get_drvdata(pdev
);
141 iproc_pcie_shutdown(pcie
);
144 static struct platform_driver iproc_pcie_pltfm_driver
= {
146 .name
= "iproc-pcie",
147 .of_match_table
= of_match_ptr(iproc_pcie_of_match_table
),
149 .probe
= iproc_pcie_pltfm_probe
,
150 .remove
= iproc_pcie_pltfm_remove
,
151 .shutdown
= iproc_pcie_pltfm_shutdown
,
153 module_platform_driver(iproc_pcie_pltfm_driver
);
155 MODULE_AUTHOR("Ray Jui <rjui@broadcom.com>");
156 MODULE_DESCRIPTION("Broadcom iPROC PCIe platform driver");
157 MODULE_LICENSE("GPL v2");