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01c54e62 NM |
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 | ||
15 | static 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 | ||
22 | static 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(mgr->dev.parent, size, &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, dma_addr); | |
35 | dma_free_coherent(mgr->dev.parent, size, kbuf, dma_addr); | |
36 | ||
37 | return ret; | |
38 | } | |
39 | ||
01c54e62 | 40 | static const struct fpga_manager_ops versal_fpga_ops = { |
01c54e62 NM |
41 | .write_init = versal_fpga_ops_write_init, |
42 | .write = versal_fpga_ops_write, | |
01c54e62 NM |
43 | }; |
44 | ||
45 | static 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(&pdev->dev, DMA_BIT_MASK(32)); | |
52 | if (ret < 0) { | |
53 | dev_err(dev, "no usable DMA configuration\n"); | |
54 | return ret; | |
55 | } | |
56 | ||
57 | mgr = devm_fpga_mgr_create(dev, "Xilinx Versal FPGA Manager", | |
58 | &versal_fpga_ops, NULL); | |
59 | if (!mgr) | |
60 | return -ENOMEM; | |
61 | ||
62 | return devm_fpga_mgr_register(dev, mgr); | |
63 | } | |
64 | ||
65 | static const struct of_device_id versal_fpga_of_match[] = { | |
66 | { .compatible = "xlnx,versal-fpga", }, | |
67 | {}, | |
68 | }; | |
69 | MODULE_DEVICE_TABLE(of, versal_fpga_of_match); | |
70 | ||
71 | static struct platform_driver versal_fpga_driver = { | |
72 | .probe = versal_fpga_probe, | |
73 | .driver = { | |
74 | .name = "versal_fpga_manager", | |
75 | .of_match_table = of_match_ptr(versal_fpga_of_match), | |
76 | }, | |
77 | }; | |
78 | module_platform_driver(versal_fpga_driver); | |
79 | ||
80 | MODULE_AUTHOR("Nava kishore Manne <nava.manne@xilinx.com>"); | |
81 | MODULE_AUTHOR("Appana Durga Kedareswara rao <appanad.durga.rao@xilinx.com>"); | |
82 | MODULE_DESCRIPTION("Xilinx Versal FPGA Manager"); | |
83 | MODULE_LICENSE("GPL"); |