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- // SPDX-License-Identifier: GPL-2.0
- /*
- * FPGA Bridge Driver for FPGA Management Engine (FME)
- *
- * Copyright (C) 2017-2018 Intel Corporation, Inc.
- *
- * Authors:
- * Wu Hao <[email protected]>
- * Joseph Grecco <[email protected]>
- * Enno Luebbers <[email protected]>
- * Tim Whisonant <[email protected]>
- * Ananda Ravuri <[email protected]>
- * Henry Mitchel <[email protected]>
- */
- #include <linux/module.h>
- #include <linux/fpga/fpga-bridge.h>
- #include "dfl.h"
- #include "dfl-fme-pr.h"
- struct fme_br_priv {
- struct dfl_fme_br_pdata *pdata;
- struct dfl_fpga_port_ops *port_ops;
- struct platform_device *port_pdev;
- };
- static int fme_bridge_enable_set(struct fpga_bridge *bridge, bool enable)
- {
- struct fme_br_priv *priv = bridge->priv;
- struct platform_device *port_pdev;
- struct dfl_fpga_port_ops *ops;
- if (!priv->port_pdev) {
- port_pdev = dfl_fpga_cdev_find_port(priv->pdata->cdev,
- &priv->pdata->port_id,
- dfl_fpga_check_port_id);
- if (!port_pdev)
- return -ENODEV;
- priv->port_pdev = port_pdev;
- }
- if (priv->port_pdev && !priv->port_ops) {
- ops = dfl_fpga_port_ops_get(priv->port_pdev);
- if (!ops || !ops->enable_set)
- return -ENOENT;
- priv->port_ops = ops;
- }
- return priv->port_ops->enable_set(priv->port_pdev, enable);
- }
- static const struct fpga_bridge_ops fme_bridge_ops = {
- .enable_set = fme_bridge_enable_set,
- };
- static int fme_br_probe(struct platform_device *pdev)
- {
- struct device *dev = &pdev->dev;
- struct fme_br_priv *priv;
- struct fpga_bridge *br;
- priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
- if (!priv)
- return -ENOMEM;
- priv->pdata = dev_get_platdata(dev);
- br = fpga_bridge_register(dev, "DFL FPGA FME Bridge",
- &fme_bridge_ops, priv);
- if (IS_ERR(br))
- return PTR_ERR(br);
- platform_set_drvdata(pdev, br);
- return 0;
- }
- static int fme_br_remove(struct platform_device *pdev)
- {
- struct fpga_bridge *br = platform_get_drvdata(pdev);
- struct fme_br_priv *priv = br->priv;
- fpga_bridge_unregister(br);
- if (priv->port_pdev)
- put_device(&priv->port_pdev->dev);
- if (priv->port_ops)
- dfl_fpga_port_ops_put(priv->port_ops);
- return 0;
- }
- static struct platform_driver fme_br_driver = {
- .driver = {
- .name = DFL_FPGA_FME_BRIDGE,
- },
- .probe = fme_br_probe,
- .remove = fme_br_remove,
- };
- module_platform_driver(fme_br_driver);
- MODULE_DESCRIPTION("FPGA Bridge for DFL FPGA Management Engine");
- MODULE_AUTHOR("Intel Corporation");
- MODULE_LICENSE("GPL v2");
- MODULE_ALIAS("platform:dfl-fme-bridge");
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