mirror of
https://github.com/rd-stuffs/msm-4.14.git
synced 2025-02-20 11:45:48 +08:00
78f5f83181
Add new mailbox for gvm which will be used to siganl primary host when gvm want to communicate with remote sub system. This mailbox will use virtual IRQ line which will trigger interrupt to primary host and primary host will then forward this interrupt to corresponding remote sub system. Change-Id: Ib9e10e26f0e636e9a3a4cbaf9676362f5574d681 Signed-off-by: Arun Prakash <app@codeaurora.org>
127 lines
3.2 KiB
C
127 lines
3.2 KiB
C
/*
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* Copyright (c) 2020, The Linux Foundation, All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 and
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* only version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/io.h>
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#include <linux/slab.h>
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#include <linux/of.h>
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#include <linux/of_platform.h>
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#include <linux/platform_device.h>
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#include <linux/mailbox_controller.h>
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#define QCOM_GVM_CHNL 32
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struct qcom_gvm_ipc {
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struct mbox_controller mbox;
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struct mbox_chan mbox_chans[QCOM_GVM_CHNL];
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void __iomem *reg;
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unsigned long offset;
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};
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static int qcom_gvm_ipc_send_data(struct mbox_chan *chan, void *data)
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{
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struct qcom_gvm_ipc *gvm_ipc = container_of(chan->mbox,
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struct qcom_gvm_ipc, mbox);
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__raw_writel(1, gvm_ipc->reg);
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return 0;
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}
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static const struct mbox_chan_ops qcom_gvm_ipc_ops = {
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.send_data = qcom_gvm_ipc_send_data,
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};
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static int qcom_gvm_ipc_probe(struct platform_device *pdev)
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{
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struct qcom_gvm_ipc *gvm_ipc;
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struct resource *res;
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void __iomem *base;
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unsigned long i;
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int ret;
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gvm_ipc = devm_kzalloc(&pdev->dev, sizeof(*gvm_ipc), GFP_KERNEL);
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if (!gvm_ipc)
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return -ENOMEM;
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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if (!res)
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return -ENODEV;
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base = devm_ioremap(&pdev->dev, res->start, resource_size(res));
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if (IS_ERR(base))
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return PTR_ERR(base);
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gvm_ipc->reg = base;
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/* Initialize channel identifiers */
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for (i = 0; i < ARRAY_SIZE(gvm_ipc->mbox_chans); i++)
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gvm_ipc->mbox_chans[i].con_priv = (void *)i;
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gvm_ipc->mbox.dev = &pdev->dev;
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gvm_ipc->mbox.ops = &qcom_gvm_ipc_ops;
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gvm_ipc->mbox.chans = gvm_ipc->mbox_chans;
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gvm_ipc->mbox.num_chans = ARRAY_SIZE(gvm_ipc->mbox_chans);
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ret = mbox_controller_register(&gvm_ipc->mbox);
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if (ret) {
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dev_err(&pdev->dev, "failed to register GVM IPC controller\n");
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return ret;
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}
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platform_set_drvdata(pdev, gvm_ipc);
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return 0;
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}
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static int qcom_gvm_ipc_remove(struct platform_device *pdev)
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{
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struct qcom_gvm_ipc *gvm_ipc = platform_get_drvdata(pdev);
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mbox_controller_unregister(&gvm_ipc->mbox);
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return 0;
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}
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/* .data is the offset of the ipc register within the global block */
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static const struct of_device_id qcom_gvm_ipc_of_match[] = {
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{ .compatible = "qcom,sm8150-apcs-hmss-global" },
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{}
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};
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MODULE_DEVICE_TABLE(of, qcom_gvm_ipc_of_match);
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static struct platform_driver qcom_gvm_ipc_driver = {
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.probe = qcom_gvm_ipc_probe,
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.remove = qcom_gvm_ipc_remove,
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.driver = {
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.name = "qcom_gvm_ipc",
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.of_match_table = qcom_gvm_ipc_of_match,
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.suppress_bind_attrs = true,
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},
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};
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static int __init qcom_gvm_ipc_init(void)
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{
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return platform_driver_register(&qcom_gvm_ipc_driver);
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}
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postcore_initcall(qcom_gvm_ipc_init);
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static void __exit qcom_gvm_ipc_exit(void)
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{
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platform_driver_unregister(&qcom_gvm_ipc_driver);
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}
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module_exit(qcom_gvm_ipc_exit);
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MODULE_DESCRIPTION("Qualcomm Technologies, Inc. GVM IPC driver");
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MODULE_LICENSE("GPL v2");
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