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git://nv-tegra.nvidia.com/linux-nv-oot.git
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304123a3bf
Port RTCPU drivers from kernel/nvidia to kernel/nvidia-oot. In addition to copying the files this patch: 1) Modifies make files to build rtcpu drivers as modules 2) Modifies licenses of all ported files to SPDX 3) Adds MODULE_LICENSE macro to all modules 4) Removes checks for old kernel versions and the dead code after those checks 5) Fixes style errors according to checkpatch.pl Change-Id: If64296a22ce958e5326c7509cb69f8f7154f598e Signed-off-by: Frank Chen <frankc@nvidia.com> Signed-off-by: Matti Ryttylainen <mryttylainen@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/2783040 Reviewed-by: Laxman Dewangan <ldewangan@nvidia.com> Reviewed-by: Ankur Pawar <ankurp@nvidia.com> Reviewed-by: Semi Malinen <smalinen@nvidia.com> Reviewed-by: Pekka Pessi <ppessi@nvidia.com> GVS: Gerrit_Virtual_Submit <buildbot_gerritrpt@nvidia.com>
116 lines
2.9 KiB
C
116 lines
2.9 KiB
C
// SPDX-License-Identifier: GPL-2.0
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// Copyright (c) 2022, NVIDIA CORPORATION & AFFILIATES. All rights reserved.
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#include <linux/device.h>
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#include <linux/interrupt.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/slab.h>
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#include <linux/tegra-camera-rtcpu.h>
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#include <linux/tegra-rtcpu-monitor.h>
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#include "drivers/video/tegra/host/vi/vi_notify.h"
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#include "vi-notify.h"
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struct tegra_camrtc_mon {
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struct device *rce_dev;
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int wdt_irq;
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struct work_struct wdt_work;
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};
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int tegra_camrtc_mon_restore_rtcpu(struct tegra_camrtc_mon *cam_rtcpu_mon)
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{
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/* (Re)boot the rtcpu */
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/* rtcpu-down and rtcpu-up events are broadcast to all ivc channels */
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return tegra_camrtc_reboot(cam_rtcpu_mon->rce_dev);
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}
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EXPORT_SYMBOL(tegra_camrtc_mon_restore_rtcpu);
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static void tegra_camrtc_mon_wdt_worker(struct work_struct *work)
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{
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struct tegra_camrtc_mon *cam_rtcpu_mon = container_of(work,
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struct tegra_camrtc_mon, wdt_work);
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dev_info(cam_rtcpu_mon->rce_dev,
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"Alert: Camera RTCPU gone bad! restoring it immediately!!\n");
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tegra_camrtc_mon_restore_rtcpu(cam_rtcpu_mon);
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/* Enable WDT IRQ */
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enable_irq(cam_rtcpu_mon->wdt_irq);
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}
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static irqreturn_t tegra_camrtc_mon_wdt_remote_isr(int irq, void *data)
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{
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struct tegra_camrtc_mon *cam_rtcpu_mon = data;
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disable_irq_nosync(irq);
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schedule_work(&cam_rtcpu_mon->wdt_work);
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return IRQ_HANDLED;
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}
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static int tegra_camrtc_mon_wdt_irq_setup(
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struct tegra_camrtc_mon *cam_rtcpu_mon)
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{
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struct platform_device *pdev =
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to_platform_device(cam_rtcpu_mon->rce_dev);
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int ret;
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cam_rtcpu_mon->wdt_irq = platform_get_irq_byname(pdev, "wdt-remote");
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if (cam_rtcpu_mon->wdt_irq < 0) {
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dev_warn(&pdev->dev, "missing irq wdt-remote\n");
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return -ENODEV;
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}
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ret = devm_request_threaded_irq(&pdev->dev, cam_rtcpu_mon->wdt_irq,
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NULL, tegra_camrtc_mon_wdt_remote_isr, IRQF_ONESHOT,
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dev_name(cam_rtcpu_mon->rce_dev), cam_rtcpu_mon);
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if (ret)
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return ret;
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dev_info(&pdev->dev, "using cam RTCPU IRQ (%d)\n",
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cam_rtcpu_mon->wdt_irq);
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return 0;
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}
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struct tegra_camrtc_mon *tegra_camrtc_mon_create(struct device *dev)
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{
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struct tegra_camrtc_mon *cam_rtcpu_mon;
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cam_rtcpu_mon = devm_kzalloc(dev, sizeof(*cam_rtcpu_mon), GFP_KERNEL);
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if (unlikely(cam_rtcpu_mon == NULL))
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return ERR_PTR(-ENOMEM);
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cam_rtcpu_mon->rce_dev = dev;
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/* Initialize wdt_work */
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INIT_WORK(&cam_rtcpu_mon->wdt_work, tegra_camrtc_mon_wdt_worker);
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tegra_camrtc_mon_wdt_irq_setup(cam_rtcpu_mon);
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dev_info(dev, "tegra_camrtc_mon_create is successful\n");
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return cam_rtcpu_mon;
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}
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EXPORT_SYMBOL(tegra_camrtc_mon_create);
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int tegra_cam_rtcpu_mon_destroy(struct tegra_camrtc_mon *cam_rtcpu_mon)
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{
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if (IS_ERR_OR_NULL(cam_rtcpu_mon))
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return -EINVAL;
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devm_kfree(cam_rtcpu_mon->rce_dev, cam_rtcpu_mon);
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return 0;
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}
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EXPORT_SYMBOL(tegra_cam_rtcpu_mon_destroy);
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MODULE_DESCRIPTION("CAMERA RTCPU monitor driver");
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MODULE_AUTHOR("Sudhir Vyas <svyas@nvidia.com>");
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MODULE_LICENSE("GPL v2");
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