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Subject[PATCH v3 15/21] fpga: dfl: add fpga bridge platform driver for FME
Date
This patch adds fpga bridge platform driver for FPGA Management Engine.
It implements the enable_set call back for fpga bridge.

Signed-off-by: Tim Whisonant <tim.whisonant@intel.com>
Signed-off-by: Enno Luebbers <enno.luebbers@intel.com>
Signed-off-by: Shiva Rao <shiva.rao@intel.com>
Signed-off-by: Christopher Rauer <christopher.rauer@intel.com>
Signed-off-by: Wu Hao <hao.wu@intel.com>
----
v3: rename driver to fpga-dfl-fme-br
remove useless dev_dbg in probe function.
rebased due to fpga api change.
---
drivers/fpga/Kconfig | 6 +++
drivers/fpga/Makefile | 1 +
drivers/fpga/fpga-dfl-fme-br.c | 87 ++++++++++++++++++++++++++++++++++++++++++
3 files changed, 94 insertions(+)
create mode 100644 drivers/fpga/fpga-dfl-fme-br.c

diff --git a/drivers/fpga/Kconfig b/drivers/fpga/Kconfig
index 0171ecb..3804064 100644
--- a/drivers/fpga/Kconfig
+++ b/drivers/fpga/Kconfig
@@ -156,6 +156,12 @@ config FPGA_DFL_FME_MGR
help
Say Y to enable FPGA Manager driver for FPGA Management Engine.

+config FPGA_DFL_FME_BRIDGE
+ tristate "FPGA DFL FME Bridge Driver"
+ depends on FPGA_DFL_FME
+ help
+ Say Y to enable FPGA Bridge driver for FPGA Management Engine.
+
config INTEL_FPGA_DFL_PCI
tristate "Intel FPGA DFL PCIe Device Driver"
depends on PCI && FPGA_DFL
diff --git a/drivers/fpga/Makefile b/drivers/fpga/Makefile
index 6378580..3c8c4c7 100644
--- a/drivers/fpga/Makefile
+++ b/drivers/fpga/Makefile
@@ -32,6 +32,7 @@ obj-$(CONFIG_OF_FPGA_REGION) += of-fpga-region.o
obj-$(CONFIG_FPGA_DFL) += fpga-dfl.o
obj-$(CONFIG_FPGA_DFL_FME) += fpga-dfl-fme.o
obj-$(CONFIG_FPGA_DFL_FME_MGR) += fpga-dfl-fme-mgr.o
+obj-$(CONFIG_FPGA_DFL_FME_BRIDGE) += fpga-dfl-fme-br.o

fpga-dfl-fme-objs := dfl-fme-main.o dfl-fme-pr.o

diff --git a/drivers/fpga/fpga-dfl-fme-br.c b/drivers/fpga/fpga-dfl-fme-br.c
new file mode 100644
index 0000000..db2603b
--- /dev/null
+++ b/drivers/fpga/fpga-dfl-fme-br.c
@@ -0,0 +1,87 @@
+/*
+ * FPGA Bridge Driver for FPGA Management Engine (FME)
+ *
+ * Copyright (C) 2017 Intel Corporation, Inc.
+ *
+ * Authors:
+ * Wu Hao <hao.wu@intel.com>
+ * Joseph Grecco <joe.grecco@intel.com>
+ * Enno Luebbers <enno.luebbers@intel.com>
+ * Tim Whisonant <tim.whisonant@intel.com>
+ * Ananda Ravuri <ananda.ravuri@intel.com>
+ * Henry Mitchel <henry.mitchel@intel.com>
+ *
+ * This work is licensed under the terms of the GNU GPL version 2.
+ * SPDX-License-Identifier: GPL-2.0
+ */
+
+#include <linux/module.h>
+#include <linux/fpga/fpga-bridge.h>
+
+#include "fpga-dfl.h"
+#include "dfl-fme.h"
+
+static int fme_bridge_enable_set(struct fpga_bridge *bridge, bool enable)
+{
+ struct fme_br_pdata *pdata = bridge->priv;
+ int ret = 0;
+
+ if (enable)
+ fpga_port_enable(pdata->port);
+ else
+ ret = fpga_port_disable(pdata->port);
+
+ return ret;
+}
+
+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_pdata *pdata = dev_get_platdata(dev);
+ struct fpga_bridge *br;
+ int ret;
+
+ br = devm_kzalloc(dev, sizeof(*br), GFP_KERNEL);
+ if (!br)
+ return -ENOMEM;
+
+ br->name = "Intel FPGA FME Bridge";
+ br->br_ops = &fme_bridge_ops;
+ br->priv = pdata;
+ br->parent = dev;
+ platform_set_drvdata(pdev, br);
+
+ ret = fpga_bridge_register(br);
+ if (ret)
+ dev_err(dev, "unable to register FPGA Bridge\n");
+
+ return ret;
+}
+
+static int fme_br_remove(struct platform_device *pdev)
+{
+ struct fpga_bridge *br = platform_get_drvdata(pdev);
+
+ fpga_bridge_unregister(br);
+
+ return 0;
+}
+
+static struct platform_driver fme_br_driver = {
+ .driver = {
+ .name = FPGA_DFL_FME_BRIDGE,
+ },
+ .probe = fme_br_probe,
+ .remove = fme_br_remove,
+};
+
+module_platform_driver(fme_br_driver);
+
+MODULE_DESCRIPTION("FPGA Bridge for FPGA Management Engine");
+MODULE_AUTHOR("Intel Corporation");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:fpga-dfl-fme-bridge");
--
1.8.3.1
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