tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * Copyright (C) 2019 Xilinx, Inc.
4 */
5
6#include <linux/dma-mapping.h>
7#include <linux/fpga/fpga-mgr.h>
8#include <linux/io.h>
9#include <linux/kernel.h>
10#include <linux/module.h>
11#include <linux/of_address.h>
12#include <linux/string.h>
13#include <linux/firmware/xlnx-zynqmp.h>
14
15/* Constant Definitions */
16#define IXR_FPGA_DONE_MASK BIT(3)
17
18/**
19 * struct zynqmp_fpga_priv - Private data structure
20 * @dev: Device data structure
21 * @flags: flags which is used to identify the bitfile type
22 */
23struct zynqmp_fpga_priv {
24 struct device *dev;
25 u32 flags;
26};
27
28static int zynqmp_fpga_ops_write_init(struct fpga_manager *mgr,
29 struct fpga_image_info *info,
30 const char *buf, size_t size)
31{
32 struct zynqmp_fpga_priv *priv;
33
34 priv = mgr->priv;
35 priv->flags = info->flags;
36
37 return 0;
38}
39
40static int zynqmp_fpga_ops_write(struct fpga_manager *mgr,
41 const char *buf, size_t size)
42{
43 const struct zynqmp_eemi_ops *eemi_ops = zynqmp_pm_get_eemi_ops();
44 struct zynqmp_fpga_priv *priv;
45 dma_addr_t dma_addr;
46 u32 eemi_flags = 0;
47 char *kbuf;
48 int ret;
49
50 if (IS_ERR_OR_NULL(eemi_ops) || !eemi_ops->fpga_load)
51 return -ENXIO;
52
53 priv = mgr->priv;
54
55 kbuf = dma_alloc_coherent(priv->dev, size, &dma_addr, GFP_KERNEL);
56 if (!kbuf)
57 return -ENOMEM;
58
59 memcpy(kbuf, buf, size);
60
61 wmb(); /* ensure all writes are done before initiate FW call */
62
63 if (priv->flags & FPGA_MGR_PARTIAL_RECONFIG)
64 eemi_flags |= XILINX_ZYNQMP_PM_FPGA_PARTIAL;
65
66 ret = eemi_ops->fpga_load(dma_addr, size, eemi_flags);
67
68 dma_free_coherent(priv->dev, size, kbuf, dma_addr);
69
70 return ret;
71}
72
73static int zynqmp_fpga_ops_write_complete(struct fpga_manager *mgr,
74 struct fpga_image_info *info)
75{
76 return 0;
77}
78
79static enum fpga_mgr_states zynqmp_fpga_ops_state(struct fpga_manager *mgr)
80{
81 const struct zynqmp_eemi_ops *eemi_ops = zynqmp_pm_get_eemi_ops();
82 u32 status;
83
84 if (IS_ERR_OR_NULL(eemi_ops) || !eemi_ops->fpga_get_status)
85 return FPGA_MGR_STATE_UNKNOWN;
86
87 eemi_ops->fpga_get_status(&status);
88 if (status & IXR_FPGA_DONE_MASK)
89 return FPGA_MGR_STATE_OPERATING;
90
91 return FPGA_MGR_STATE_UNKNOWN;
92}
93
94static const struct fpga_manager_ops zynqmp_fpga_ops = {
95 .state = zynqmp_fpga_ops_state,
96 .write_init = zynqmp_fpga_ops_write_init,
97 .write = zynqmp_fpga_ops_write,
98 .write_complete = zynqmp_fpga_ops_write_complete,
99};
100
101static int zynqmp_fpga_probe(struct platform_device *pdev)
102{
103 struct device *dev = &pdev->dev;
104 struct zynqmp_fpga_priv *priv;
105 struct fpga_manager *mgr;
106 int ret;
107
108 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
109 if (!priv)
110 return -ENOMEM;
111
112 priv->dev = dev;
113
114 mgr = devm_fpga_mgr_create(dev, "Xilinx ZynqMP FPGA Manager",
115 &zynqmp_fpga_ops, priv);
116 if (!mgr)
117 return -ENOMEM;
118
119 platform_set_drvdata(pdev, mgr);
120
121 ret = fpga_mgr_register(mgr);
122 if (ret) {
123 dev_err(dev, "unable to register FPGA manager");
124 return ret;
125 }
126
127 return 0;
128}
129
130static int zynqmp_fpga_remove(struct platform_device *pdev)
131{
132 struct fpga_manager *mgr = platform_get_drvdata(pdev);
133
134 fpga_mgr_unregister(mgr);
135
136 return 0;
137}
138
139static const struct of_device_id zynqmp_fpga_of_match[] = {
140 { .compatible = "xlnx,zynqmp-pcap-fpga", },
141 {},
142};
143
144MODULE_DEVICE_TABLE(of, zynqmp_fpga_of_match);
145
146static struct platform_driver zynqmp_fpga_driver = {
147 .probe = zynqmp_fpga_probe,
148 .remove = zynqmp_fpga_remove,
149 .driver = {
150 .name = "zynqmp_fpga_manager",
151 .of_match_table = of_match_ptr(zynqmp_fpga_of_match),
152 },
153};
154
155module_platform_driver(zynqmp_fpga_driver);
156
157MODULE_AUTHOR("Nava kishore Manne <navam@xilinx.com>");
158MODULE_DESCRIPTION("Xilinx ZynqMp FPGA Manager");
159MODULE_LICENSE("GPL");