1 // SPDX-License-Identifier: GPL-2.0
3 * Cadence PCIe platform driver.
5 * Copyright (c) 2019, Cadence Design Systems
6 * Author: Tom Joseph <tjoseph@cadence.com>
8 #include <linux/kernel.h>
9 #include <linux/of_address.h>
10 #include <linux/of_pci.h>
11 #include <linux/platform_device.h>
12 #include <linux/pm_runtime.h>
13 #include <linux/of_device.h>
14 #include "pcie-cadence.h"
17 * struct cdns_plat_pcie - private data for this PCIe platform driver
18 * @pcie: Cadence PCIe controller
19 * @is_rc: Set to 1 indicates the PCIe controller mode is Root Complex,
20 * if 0 it is in Endpoint mode.
22 struct cdns_plat_pcie {
23 struct cdns_pcie *pcie;
27 struct cdns_plat_pcie_of_data {
31 static const struct of_device_id cdns_plat_pcie_of_match[];
33 static int cdns_plat_pcie_probe(struct platform_device *pdev)
35 const struct cdns_plat_pcie_of_data *data;
36 struct cdns_plat_pcie *cdns_plat_pcie;
37 const struct of_device_id *match;
38 struct device *dev = &pdev->dev;
39 struct pci_host_bridge *bridge;
40 struct cdns_pcie_ep *ep;
41 struct cdns_pcie_rc *rc;
46 match = of_match_device(cdns_plat_pcie_of_match, dev);
50 data = (struct cdns_plat_pcie_of_data *)match->data;
53 pr_debug(" Started %s with is_rc: %d\n", __func__, is_rc);
54 cdns_plat_pcie = devm_kzalloc(dev, sizeof(*cdns_plat_pcie), GFP_KERNEL);
58 platform_set_drvdata(pdev, cdns_plat_pcie);
60 if (!IS_ENABLED(CONFIG_PCIE_CADENCE_PLAT_HOST))
63 bridge = devm_pci_alloc_host_bridge(dev, sizeof(*rc));
67 rc = pci_host_bridge_priv(bridge);
69 cdns_plat_pcie->pcie = &rc->pcie;
70 cdns_plat_pcie->is_rc = is_rc;
72 ret = cdns_pcie_init_phy(dev, cdns_plat_pcie->pcie);
74 dev_err(dev, "failed to init phy\n");
77 pm_runtime_enable(dev);
78 ret = pm_runtime_get_sync(dev);
80 dev_err(dev, "pm_runtime_get_sync() failed\n");
84 ret = cdns_pcie_host_setup(rc);
88 if (!IS_ENABLED(CONFIG_PCIE_CADENCE_PLAT_EP))
91 ep = devm_kzalloc(dev, sizeof(*ep), GFP_KERNEL);
96 cdns_plat_pcie->pcie = &ep->pcie;
97 cdns_plat_pcie->is_rc = is_rc;
99 ret = cdns_pcie_init_phy(dev, cdns_plat_pcie->pcie);
101 dev_err(dev, "failed to init phy\n");
105 pm_runtime_enable(dev);
106 ret = pm_runtime_get_sync(dev);
108 dev_err(dev, "pm_runtime_get_sync() failed\n");
112 ret = cdns_pcie_ep_setup(ep);
118 pm_runtime_put_sync(dev);
121 pm_runtime_disable(dev);
122 cdns_pcie_disable_phy(cdns_plat_pcie->pcie);
123 phy_count = cdns_plat_pcie->pcie->phy_count;
125 device_link_del(cdns_plat_pcie->pcie->link[phy_count]);
130 static void cdns_plat_pcie_shutdown(struct platform_device *pdev)
132 struct device *dev = &pdev->dev;
133 struct cdns_pcie *pcie = dev_get_drvdata(dev);
136 ret = pm_runtime_put_sync(dev);
138 dev_dbg(dev, "pm_runtime_put_sync failed\n");
140 pm_runtime_disable(dev);
142 cdns_pcie_disable_phy(pcie);
145 static const struct cdns_plat_pcie_of_data cdns_plat_pcie_host_of_data = {
149 static const struct cdns_plat_pcie_of_data cdns_plat_pcie_ep_of_data = {
153 static const struct of_device_id cdns_plat_pcie_of_match[] = {
155 .compatible = "cdns,cdns-pcie-host",
156 .data = &cdns_plat_pcie_host_of_data,
159 .compatible = "cdns,cdns-pcie-ep",
160 .data = &cdns_plat_pcie_ep_of_data,
165 static struct platform_driver cdns_plat_pcie_driver = {
168 .of_match_table = cdns_plat_pcie_of_match,
169 .pm = &cdns_pcie_pm_ops,
171 .probe = cdns_plat_pcie_probe,
172 .shutdown = cdns_plat_pcie_shutdown,
174 builtin_platform_driver(cdns_plat_pcie_driver);