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144 lines · 3.2 KiB

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 struct zynqmp_fpga_priv *priv;
44 dma_addr_t dma_addr;
45 u32 eemi_flags = 0;
46 char *kbuf;
47 int ret;
48
49 priv = mgr->priv;
50
51 kbuf = dma_alloc_coherent(priv->dev, size, &dma_addr, GFP_KERNEL);
52 if (!kbuf)
53 return -ENOMEM;
54
55 memcpy(kbuf, buf, size);
56
57 wmb(); /* ensure all writes are done before initiate FW call */
58
59 if (priv->flags & FPGA_MGR_PARTIAL_RECONFIG)
60 eemi_flags |= XILINX_ZYNQMP_PM_FPGA_PARTIAL;
61
62 ret = zynqmp_pm_fpga_load(dma_addr, size, eemi_flags);
63
64 dma_free_coherent(priv->dev, size, kbuf, dma_addr);
65
66 return ret;
67}
68
69static enum fpga_mgr_states zynqmp_fpga_ops_state(struct fpga_manager *mgr)
70{
71 u32 status = 0;
72
73 zynqmp_pm_fpga_get_status(&status);
74 if (status & IXR_FPGA_DONE_MASK)
75 return FPGA_MGR_STATE_OPERATING;
76
77 return FPGA_MGR_STATE_UNKNOWN;
78}
79
80static ssize_t status_show(struct device *dev,
81 struct device_attribute *attr, char *buf)
82{
83 u32 status;
84 int ret;
85
86 ret = zynqmp_pm_fpga_get_config_status(&status);
87 if (ret)
88 return ret;
89
90 return sysfs_emit(buf, "0x%x\n", status);
91}
92static DEVICE_ATTR_RO(status);
93
94static struct attribute *zynqmp_fpga_attrs[] = {
95 &dev_attr_status.attr,
96 NULL,
97};
98ATTRIBUTE_GROUPS(zynqmp_fpga);
99
100static const struct fpga_manager_ops zynqmp_fpga_ops = {
101 .state = zynqmp_fpga_ops_state,
102 .write_init = zynqmp_fpga_ops_write_init,
103 .write = zynqmp_fpga_ops_write,
104};
105
106static int zynqmp_fpga_probe(struct platform_device *pdev)
107{
108 struct device *dev = &pdev->dev;
109 struct zynqmp_fpga_priv *priv;
110 struct fpga_manager *mgr;
111
112 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
113 if (!priv)
114 return -ENOMEM;
115
116 priv->dev = dev;
117
118 mgr = devm_fpga_mgr_register(dev, "Xilinx ZynqMP FPGA Manager",
119 &zynqmp_fpga_ops, priv);
120 return PTR_ERR_OR_ZERO(mgr);
121}
122
123#ifdef CONFIG_OF
124static const struct of_device_id zynqmp_fpga_of_match[] = {
125 { .compatible = "xlnx,zynqmp-pcap-fpga", },
126 {},
127};
128MODULE_DEVICE_TABLE(of, zynqmp_fpga_of_match);
129#endif
130
131static struct platform_driver zynqmp_fpga_driver = {
132 .probe = zynqmp_fpga_probe,
133 .driver = {
134 .name = "zynqmp_fpga_manager",
135 .of_match_table = of_match_ptr(zynqmp_fpga_of_match),
136 .dev_groups = zynqmp_fpga_groups,
137 },
138};
139
140module_platform_driver(zynqmp_fpga_driver);
141
142MODULE_AUTHOR("Nava kishore Manne <[email protected]>");
143MODULE_DESCRIPTION("Xilinx ZynqMp FPGA Manager");
144MODULE_LICENSE("GPL");