1 // SPDX-License-Identifier: GPL-2.0
5  * Copyright (C) 2022-2023, Advanced Micro Devices, Inc.
8 #include <linux/rpmsg.h>
21 	{ .name = "mcdi_ipc" },
24 MODULE_DEVICE_TABLE(rpmsg, cdx_rpmsg_id_table);
35 		return -ENOMEM;  in cdx_rpmsg_send()
40 	ret = rpmsg_send(cdx_mcdi->ept, send_buf, hdr_len + sdu_len);  in cdx_rpmsg_send()
55 	dev = &pdev->dev;  in cdx_attach_to_rproc()
57 	cdx_mcdi = cdx_c->priv;  in cdx_attach_to_rproc()
59 	r5_core_node = of_parse_phandle(dev->of_node, "xlnx,rproc", 0);  in cdx_attach_to_rproc()
61 		dev_err(&pdev->dev, "xlnx,rproc: invalid phandle\n");  in cdx_attach_to_rproc()
62 		return -EINVAL;  in cdx_attach_to_rproc()
65 	rp = rproc_get_by_phandle(r5_core_node->phandle);  in cdx_attach_to_rproc()
67 		ret = -EPROBE_DEFER;  in cdx_attach_to_rproc()
74 		dev_err(&pdev->dev, "Failed to attach to remote processor\n");  in cdx_attach_to_rproc()
79 	cdx_mcdi->r5_rproc = rp;  in cdx_attach_to_rproc()
91 	cdx_mcdi = cdx_c->priv;  in cdx_detach_to_r5()
93 	rproc_detach(cdx_mcdi->r5_rproc);  in cdx_detach_to_r5()
94 	rproc_put(cdx_mcdi->r5_rproc);  in cdx_detach_to_r5()
100 	struct cdx_controller *cdx_c = dev_get_drvdata(&rpdev->dev);  in cdx_rpmsg_cb()
101 	struct cdx_mcdi *cdx_mcdi = cdx_c->priv;  in cdx_rpmsg_cb()
104 		return -EINVAL;  in cdx_rpmsg_cb()
117 	cdx_c = dev_get_drvdata(&cdx_mcdi->rpdev->dev);  in cdx_rpmsg_post_probe_work()
128 	cdx_mcdi = cdx_c->priv;  in cdx_rpmsg_probe()
131 	chinfo.dst = rpdev->dst;  in cdx_rpmsg_probe()
132 	strscpy(chinfo.name, cdx_rpmsg_id_table[0].name,  in cdx_rpmsg_probe()
133 		strlen(cdx_rpmsg_id_table[0].name));  in cdx_rpmsg_probe()
135 	cdx_mcdi->ept = rpmsg_create_ept(rpdev, cdx_rpmsg_cb, NULL, chinfo);  in cdx_rpmsg_probe()
136 	if (!cdx_mcdi->ept) {  in cdx_rpmsg_probe()
137 		dev_err_probe(&rpdev->dev, -ENXIO,  in cdx_rpmsg_probe()
139 			      chinfo.name);  in cdx_rpmsg_probe()
140 		return -EINVAL;  in cdx_rpmsg_probe()
143 	cdx_mcdi->rpdev = rpdev;  in cdx_rpmsg_probe()
144 	dev_set_drvdata(&rpdev->dev, cdx_c);  in cdx_rpmsg_probe()
146 	schedule_work(&cdx_mcdi->work);  in cdx_rpmsg_probe()
152 	struct cdx_controller *cdx_c = dev_get_drvdata(&rpdev->dev);  in cdx_rpmsg_remove()
153 	struct cdx_mcdi *cdx_mcdi = cdx_c->priv;  in cdx_rpmsg_remove()
155 	flush_work(&cdx_mcdi->work);  in cdx_rpmsg_remove()
158 	rpmsg_destroy_ept(cdx_mcdi->ept);  in cdx_rpmsg_remove()
159 	dev_set_drvdata(&rpdev->dev, NULL);  in cdx_rpmsg_remove()
163 	.drv.name = KBUILD_MODNAME,
182 	cdx_mcdi = cdx_c->priv;  in cdx_setup_rpmsg()
184 	/* Register RPMsg driver */  in cdx_setup_rpmsg()
187 	INIT_WORK(&cdx_mcdi->work, cdx_rpmsg_post_probe_work);  in cdx_setup_rpmsg()
190 		dev_err(&pdev->dev,  in cdx_setup_rpmsg()
191 			"Failed to register cdx RPMsg driver: %d\n", ret);  in cdx_setup_rpmsg()