[PATCH v4 17/24] fpga: dfl: add fpga bridge platform driver for FME
From: Wu Hao <hidden>
Date: 2018-02-13 09:40:08
Also in:
linux-fpga, lkml
Subsystem:
fpga dfl drivers, fpga manager framework, the rest · Maintainers:
Xu Yilun, Moritz Fischer, Linus Torvalds
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 <redacted>
Signed-off-by: Enno Luebbers <redacted>
Signed-off-by: Shiva Rao <redacted>
Signed-off-by: Christopher Rauer <redacted>
Signed-off-by: Wu Hao <redacted>
Acked-by: Alan Tull <redacted>
Acked-by: Moritz Fischer <redacted>
---
v3: rename driver to fpga-dfl-fme-br
remove useless dev_dbg in probe function.
rebased due to fpga api change.
v4: rename to dfl-fme-br and fix SPDX license issue
include dfl-fme-pr.h instead of dfl-fme.h
add Acked-by from Alan and Moritz
---
drivers/fpga/Kconfig | 6 ++++
drivers/fpga/Makefile | 1 +
drivers/fpga/dfl-fme-br.c | 85 +++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 92 insertions(+)
create mode 100644 drivers/fpga/dfl-fme-br.c
diff --git a/drivers/fpga/Kconfig b/drivers/fpga/Kconfig
index 89f76e8..a8f939a 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 FPGA_DFL_PCI tristate "FPGA Device Feature List (DFL) PCIe Device Driver" depends on PCI && FPGA_DFL
diff --git a/drivers/fpga/Makefile b/drivers/fpga/Makefile
index f82814a..75096e9 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) += dfl.o obj-$(CONFIG_FPGA_DFL_FME) += dfl-fme.o obj-$(CONFIG_FPGA_DFL_FME_MGR) += dfl-fme-mgr.o +obj-$(CONFIG_FPGA_DFL_FME_BRIDGE) += dfl-fme-br.o dfl-fme-objs := dfl-fme-main.o dfl-fme-pr.o
diff --git a/drivers/fpga/dfl-fme-br.c b/drivers/fpga/dfl-fme-br.c
new file mode 100644
index 0000000..46cee30
--- /dev/null
+++ b/drivers/fpga/dfl-fme-br.c@@ -0,0 +1,85 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * FPGA Bridge Driver for FPGA Management Engine (FME) + * + * Copyright (C) 2017 Intel Corporation, Inc. + * + * Authors: + * Wu Hao <hao.wu-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org> + * Joseph Grecco <joe.grecco-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org> + * Enno Luebbers <enno.luebbers-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org> + * Tim Whisonant <tim.whisonant-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org> + * Ananda Ravuri <ananda.ravuri-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org> + * Henry Mitchel <henry.mitchel-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org> + */ + +#include <linux/module.h> +#include <linux/fpga/fpga-bridge.h> + +#include "dfl.h" +#include "dfl-fme-pr.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 = "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 DFL FPGA Management Engine"); +MODULE_AUTHOR("Intel Corporation"); +MODULE_LICENSE("GPL v2"); +MODULE_ALIAS("platform:dfl-fme-bridge");
--
2.7.4