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1 | // SPDX-License-Identifier: GPL-2.0 |
2 | /* | |
3 | * FPGA Region Driver for FPGA Management Engine (FME) | |
4 | * | |
5 | * Copyright (C) 2017-2018 Intel Corporation, Inc. | |
6 | * | |
7 | * Authors: | |
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> | |
14 | */ | |
15 | ||
16 | #include <linux/module.h> | |
34bd2833 | 17 | #include <linux/fpga/fpga-mgr.h> |
bb61b9be WH |
18 | #include <linux/fpga/fpga-region.h> |
19 | ||
20 | #include "dfl-fme-pr.h" | |
21 | ||
22 | static int fme_region_get_bridges(struct fpga_region *region) | |
23 | { | |
24 | struct dfl_fme_region_pdata *pdata = region->priv; | |
25 | struct device *dev = &pdata->br->dev; | |
26 | ||
27 | return fpga_bridge_get_to_list(dev, region->info, ®ion->bridge_list); | |
28 | } | |
29 | ||
30 | static int fme_region_probe(struct platform_device *pdev) | |
31 | { | |
32 | struct dfl_fme_region_pdata *pdata = dev_get_platdata(&pdev->dev); | |
8886a579 | 33 | struct fpga_region_info info = { 0 }; |
bb61b9be WH |
34 | struct device *dev = &pdev->dev; |
35 | struct fpga_region *region; | |
36 | struct fpga_manager *mgr; | |
37 | int ret; | |
38 | ||
39 | mgr = fpga_mgr_get(&pdata->mgr->dev); | |
40 | if (IS_ERR(mgr)) | |
41 | return -EPROBE_DEFER; | |
42 | ||
8886a579 RW |
43 | info.mgr = mgr; |
44 | info.compat_id = mgr->compat_id; | |
45 | info.get_bridges = fme_region_get_bridges; | |
46 | info.priv = pdata; | |
47 | region = fpga_region_register_full(dev, &info); | |
48 | if (IS_ERR(region)) { | |
49 | ret = PTR_ERR(region); | |
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50 | goto eprobe_mgr_put; |
51 | } | |
52 | ||
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53 | platform_set_drvdata(pdev, region); |
54 | ||
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55 | dev_dbg(dev, "DFL FME FPGA Region probed\n"); |
56 | ||
57 | return 0; | |
58 | ||
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59 | eprobe_mgr_put: |
60 | fpga_mgr_put(mgr); | |
61 | return ret; | |
62 | } | |
63 | ||
64 | static int fme_region_remove(struct platform_device *pdev) | |
65 | { | |
b77c9878 | 66 | struct fpga_region *region = platform_get_drvdata(pdev); |
34bd2833 | 67 | struct fpga_manager *mgr = region->mgr; |
bb61b9be WH |
68 | |
69 | fpga_region_unregister(region); | |
34bd2833 | 70 | fpga_mgr_put(mgr); |
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71 | |
72 | return 0; | |
73 | } | |
74 | ||
75 | static struct platform_driver fme_region_driver = { | |
76 | .driver = { | |
77 | .name = DFL_FPGA_FME_REGION, | |
78 | }, | |
79 | .probe = fme_region_probe, | |
80 | .remove = fme_region_remove, | |
81 | }; | |
82 | ||
83 | module_platform_driver(fme_region_driver); | |
84 | ||
85 | MODULE_DESCRIPTION("FPGA Region for DFL FPGA Management Engine"); | |
86 | MODULE_AUTHOR("Intel Corporation"); | |
87 | MODULE_LICENSE("GPL v2"); | |
88 | MODULE_ALIAS("platform:dfl-fme-region"); |