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 */
23 struct zynqmp_fpga_priv {
24 struct device *dev;
25 u32 flags;
26 };
27
zynqmp_fpga_ops_write_init(struct fpga_manager * mgr,struct fpga_image_info * info,const char * buf,size_t size)28 static 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
zynqmp_fpga_ops_write(struct fpga_manager * mgr,const char * buf,size_t size)40 static 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
zynqmp_fpga_ops_state(struct fpga_manager * mgr)69 static 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
80 static const struct fpga_manager_ops zynqmp_fpga_ops = {
81 .state = zynqmp_fpga_ops_state,
82 .write_init = zynqmp_fpga_ops_write_init,
83 .write = zynqmp_fpga_ops_write,
84 };
85
zynqmp_fpga_probe(struct platform_device * pdev)86 static int zynqmp_fpga_probe(struct platform_device *pdev)
87 {
88 struct device *dev = &pdev->dev;
89 struct zynqmp_fpga_priv *priv;
90 struct fpga_manager *mgr;
91
92 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
93 if (!priv)
94 return -ENOMEM;
95
96 priv->dev = dev;
97
98 mgr = devm_fpga_mgr_create(dev, "Xilinx ZynqMP FPGA Manager",
99 &zynqmp_fpga_ops, priv);
100 if (!mgr)
101 return -ENOMEM;
102
103 return devm_fpga_mgr_register(dev, mgr);
104 }
105
106 #ifdef CONFIG_OF
107 static const struct of_device_id zynqmp_fpga_of_match[] = {
108 { .compatible = "xlnx,zynqmp-pcap-fpga", },
109 {},
110 };
111 MODULE_DEVICE_TABLE(of, zynqmp_fpga_of_match);
112 #endif
113
114 static struct platform_driver zynqmp_fpga_driver = {
115 .probe = zynqmp_fpga_probe,
116 .driver = {
117 .name = "zynqmp_fpga_manager",
118 .of_match_table = of_match_ptr(zynqmp_fpga_of_match),
119 },
120 };
121
122 module_platform_driver(zynqmp_fpga_driver);
123
124 MODULE_AUTHOR("Nava kishore Manne <navam@xilinx.com>");
125 MODULE_DESCRIPTION("Xilinx ZynqMp FPGA Manager");
126 MODULE_LICENSE("GPL");
127