83 lines
2.3 KiB
C
83 lines
2.3 KiB
C
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/*
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* Copyright (c) 2016-2017, NVIDIA CORPORATION. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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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/of.h>
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#include <linux/tegra-hsp.h>
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#include <linux/tegra-ivc-bus.h>
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static u32 tegra_hsp_mailbox_notify(void *data, u32 value)
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{
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struct device *dev = data;
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tegra_hsp_notify(dev);
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return 0;
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}
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static int tegra_hsp_mailbox_probe(struct device *dev)
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{
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struct tegra_hsp_sm_pair *pair;
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pair = of_tegra_hsp_sm_pair_by_name(dev->of_node, "ivc-pair",
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tegra_hsp_mailbox_notify, NULL, dev);
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if (IS_ERR(pair))
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return PTR_ERR(pair);
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dev_set_drvdata(dev, pair);
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return 0;
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}
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static void tegra_hsp_mailbox_remove(struct device *dev)
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{
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struct tegra_hsp_sm_pair *pair = dev_get_drvdata(dev);
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tegra_hsp_sm_pair_free(pair);
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}
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static void tegra_hsp_mailbox_ring(struct device *dev)
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{
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struct tegra_hsp_sm_pair *pair = dev_get_drvdata(dev);
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tegra_hsp_sm_pair_write(pair, 1);
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}
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static const struct of_device_id tegra_hsp_mailbox_of_match[] = {
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{ .compatible = "nvidia,tegra186-hsp-mailbox" },
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{ },
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};
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static const struct tegra_hsp_ops tegra_hsp_mailbox_ops = {
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.probe = tegra_hsp_mailbox_probe,
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.remove = tegra_hsp_mailbox_remove,
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.ring = tegra_hsp_mailbox_ring,
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};
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static struct tegra_ivc_driver tegra_hsp_mailbox_driver = {
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.driver = {
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.name = "tegra-hsp-mailbox",
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.bus = &tegra_ivc_bus_type,
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.owner = THIS_MODULE,
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.of_match_table = tegra_hsp_mailbox_of_match,
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},
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.dev_type = &tegra_hsp_type,
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.ops.hsp = &tegra_hsp_mailbox_ops,
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};
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/* A tegra_hsp_type driver must be registered before ivc bus is created */
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tegra_ivc_subsys_driver_default(tegra_hsp_mailbox_driver);
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MODULE_AUTHOR("Remi Denis-Courmont <remid@nvidia.com>");
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MODULE_DESCRIPTION("NVIDIA Tegra HSP shared mailbox driver");
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MODULE_LICENSE("GPL");
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