1 // SPDX-License-Identifier: GPL-2.0
3 * FPGA Bridge Driver for FPGA Management Engine (FME)
5 * Copyright (C) 2017-2018 Intel Corporation, Inc.
8 * Wu Hao <hao.wu@intel.com>
9 * Joseph Grecco <joe.grecco@intel.com>
10 * Enno Luebbers <enno.luebbers@intel.com>
11 * Tim Whisonant <tim.whisonant@intel.com>
12 * Ananda Ravuri <ananda.ravuri@intel.com>
13 * Henry Mitchel <henry.mitchel@intel.com>
16 #include <linux/module.h>
17 #include <linux/fpga/fpga-bridge.h>
20 #include "dfl-fme-pr.h"
23 struct dfl_fme_br_pdata *pdata;
24 struct dfl_fpga_port_ops *port_ops;
25 struct platform_device *port_pdev;
28 static int fme_bridge_enable_set(struct fpga_bridge *bridge, bool enable)
30 struct fme_br_priv *priv = bridge->priv;
31 struct platform_device *port_pdev;
32 struct dfl_fpga_port_ops *ops;
34 if (!priv->port_pdev) {
35 port_pdev = dfl_fpga_cdev_find_port(priv->pdata->cdev,
36 &priv->pdata->port_id,
37 dfl_fpga_check_port_id);
41 priv->port_pdev = port_pdev;
44 if (priv->port_pdev && !priv->port_ops) {
45 ops = dfl_fpga_port_ops_get(priv->port_pdev);
46 if (!ops || !ops->enable_set)
52 return priv->port_ops->enable_set(priv->port_pdev, enable);
55 static const struct fpga_bridge_ops fme_bridge_ops = {
56 .enable_set = fme_bridge_enable_set,
59 static int fme_br_probe(struct platform_device *pdev)
61 struct device *dev = &pdev->dev;
62 struct fme_br_priv *priv;
63 struct fpga_bridge *br;
66 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
70 priv->pdata = dev_get_platdata(dev);
72 br = fpga_bridge_create(dev, "DFL FPGA FME Bridge",
73 &fme_bridge_ops, priv);
77 platform_set_drvdata(pdev, br);
79 ret = fpga_bridge_register(br);
86 static int fme_br_remove(struct platform_device *pdev)
88 struct fpga_bridge *br = platform_get_drvdata(pdev);
89 struct fme_br_priv *priv = br->priv;
91 fpga_bridge_unregister(br);
94 put_device(&priv->port_pdev->dev);
96 dfl_fpga_port_ops_put(priv->port_ops);
101 static struct platform_driver fme_br_driver = {
103 .name = DFL_FPGA_FME_BRIDGE,
105 .probe = fme_br_probe,
106 .remove = fme_br_remove,
109 module_platform_driver(fme_br_driver);
111 MODULE_DESCRIPTION("FPGA Bridge for DFL FPGA Management Engine");
112 MODULE_AUTHOR("Intel Corporation");
113 MODULE_LICENSE("GPL v2");
114 MODULE_ALIAS("platform:dfl-fme-bridge");