1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (C) 2019-2021 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
15static int versal_fpga_ops_write_init(struct fpga_manager *mgr,
16 struct fpga_image_info *info,
17 const char *buf, size_t size)
18{
19 return 0;
20}
21
22static int versal_fpga_ops_write(struct fpga_manager *mgr,
23 const char *buf, size_t size)
24{
25 dma_addr_t dma_addr = 0;
26 char *kbuf;
27 int ret;
28
29 kbuf = dma_alloc_coherent(dev: mgr->dev.parent, size, dma_handle: &dma_addr, GFP_KERNEL);
30 if (!kbuf)
31 return -ENOMEM;
32
33 memcpy(kbuf, buf, size);
34 ret = zynqmp_pm_load_pdi(PDI_SRC_DDR, address: dma_addr);
35 dma_free_coherent(dev: mgr->dev.parent, size, cpu_addr: kbuf, dma_handle: dma_addr);
36
37 return ret;
38}
39
40static const struct fpga_manager_ops versal_fpga_ops = {
41 .write_init = versal_fpga_ops_write_init,
42 .write = versal_fpga_ops_write,
43};
44
45static int versal_fpga_probe(struct platform_device *pdev)
46{
47 struct device *dev = &pdev->dev;
48 struct fpga_manager *mgr;
49 int ret;
50
51 ret = dma_set_mask_and_coherent(dev: &pdev->dev, DMA_BIT_MASK(44));
52 if (ret < 0) {
53 dev_err(dev, "no usable DMA configuration\n");
54 return ret;
55 }
56
57 mgr = devm_fpga_mgr_register(parent: dev, name: "Xilinx Versal FPGA Manager",
58 mops: &versal_fpga_ops, NULL);
59 return PTR_ERR_OR_ZERO(ptr: mgr);
60}
61
62static const struct of_device_id versal_fpga_of_match[] = {
63 { .compatible = "xlnx,versal-fpga", },
64 {},
65};
66MODULE_DEVICE_TABLE(of, versal_fpga_of_match);
67
68static struct platform_driver versal_fpga_driver = {
69 .probe = versal_fpga_probe,
70 .driver = {
71 .name = "versal_fpga_manager",
72 .of_match_table = of_match_ptr(versal_fpga_of_match),
73 },
74};
75module_platform_driver(versal_fpga_driver);
76
77MODULE_AUTHOR("Nava kishore Manne <nava.manne@xilinx.com>");
78MODULE_AUTHOR("Appana Durga Kedareswara rao <appanad.durga.rao@xilinx.com>");
79MODULE_DESCRIPTION("Xilinx Versal FPGA Manager");
80MODULE_LICENSE("GPL");
81

source code of linux/drivers/fpga/versal-fpga.c