--- /dev/null
+/*
+ * drivers/video/tegra/host/bus.c
+ *
+ * Copyright (C) 2010 Google, Inc.
+ *
+ * Author:
+ * Erik Gilling <konkers@google.com>
+ *
+ * based heavily on drivers/base/platform.c
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <linux/pm_runtime.h>
+#include <linux/nvhost.h>
+
+#include "dev.h"
+
+struct nvhost_master *nvhost;
+struct device nvhost_bus = {
+ .init_name = "nvhost",
+};
+
+struct resource *nvhost_get_resource(struct nvhost_device *dev,
+ unsigned int type, unsigned int num)
+{
+ int i;
+
+ for (i = 0; i < dev->num_resources; i++) {
+ struct resource *r = &dev->resource[i];
+
+ if (type == resource_type(r) && num-- == 0)
+ return r;
+ }
+ return NULL;
+}
+EXPORT_SYMBOL_GPL(nvhost_get_resource);
+
+int nvhost_get_irq(struct nvhost_device *dev, unsigned int num)
+{
+ struct resource *r = nvhost_get_resource(dev, IORESOURCE_IRQ, num);
+
+ return r ? r->start : -ENXIO;
+}
+EXPORT_SYMBOL_GPL(nvhost_get_irq);
+
+struct resource *nvhost_get_resource_byname(struct nvhost_device *dev,
+ unsigned int type,
+ const char *name)
+{
+ int i;
+
+ for (i = 0; i < dev->num_resources; i++) {
+ struct resource *r = &dev->resource[i];
+
+ if (type == resource_type(r) && !strcmp(r->name, name))
+ return r;
+ }
+ return NULL;
+}
+EXPORT_SYMBOL_GPL(nvhost_get_resource_byname);
+
+int nvhost_get_irq_byname(struct nvhost_device *dev, const char *name)
+{
+ struct resource *r = nvhost_get_resource_byname(dev, IORESOURCE_IRQ,
+ name);
+
+ return r ? r->start : -ENXIO;
+}
+EXPORT_SYMBOL_GPL(nvhost_get_irq_byname);
+
+static int nvhost_drv_probe(struct device *_dev)
+{
+ struct nvhost_driver *drv = to_nvhost_driver(_dev->driver);
+ struct nvhost_device *dev = to_nvhost_device(_dev);
+
+ dev->host = nvhost;
+
+ return drv->probe(dev);
+}
+
+static int nvhost_drv_remove(struct device *_dev)
+{
+ struct nvhost_driver *drv = to_nvhost_driver(_dev->driver);
+ struct nvhost_device *dev = to_nvhost_device(_dev);
+
+ return drv->remove(dev);
+}
+
+static void nvhost_drv_shutdown(struct device *_dev)
+{
+ struct nvhost_driver *drv = to_nvhost_driver(_dev->driver);
+ struct nvhost_device *dev = to_nvhost_device(_dev);
+
+ drv->shutdown(dev);
+}
+
+int nvhost_driver_register(struct nvhost_driver *drv)
+{
+ drv->driver.bus = &nvhost_bus_type;
+ if (drv->probe)
+ drv->driver.probe = nvhost_drv_probe;
+ if (drv->remove)
+ drv->driver.remove = nvhost_drv_remove;
+ if (drv->shutdown)
+ drv->driver.shutdown = nvhost_drv_shutdown;
+
+ return driver_register(&drv->driver);
+}
+EXPORT_SYMBOL(nvhost_driver_register);
+
+void nvhost_driver_unregister(struct nvhost_driver *drv)
+{
+ driver_unregister(&drv->driver);
+}
+EXPORT_SYMBOL_GPL(nvhost_driver_unregister);
+
+int nvhost_device_register(struct nvhost_device *dev)
+{
+ int i, ret = 0;
+
+ if (!dev)
+ return -EINVAL;
+
+ device_initialize(&dev->dev);
+
+ if (!dev->dev.parent)
+ dev->dev.parent = &nvhost_bus;
+
+ dev->dev.bus = &nvhost_bus_type;
+
+ if (dev->id != -1)
+ dev_set_name(&dev->dev, "%s.%d", dev->name, dev->id);
+ else
+ dev_set_name(&dev->dev, "%s", dev->name);
+
+ for (i = 0; i < dev->num_resources; i++) {
+ struct resource *p, *r = &dev->resource[i];
+
+ if (r->name == NULL)
+ r->name = dev_name(&dev->dev);
+
+ p = r->parent;
+ if (!p) {
+ if (resource_type(r) == IORESOURCE_MEM)
+ p = &iomem_resource;
+ else if (resource_type(r) == IORESOURCE_IO)
+ p = &ioport_resource;
+ }
+
+ if (p && insert_resource(p, r)) {
+ pr_err("%s: failed to claim resource %d\n",
+ dev_name(&dev->dev), i);
+ ret = -EBUSY;
+ goto failed;
+ }
+ }
+
+ ret = device_add(&dev->dev);
+ if (ret == 0)
+ return ret;
+
+failed:
+ while (--i >= 0) {
+ struct resource *r = &dev->resource[i];
+ unsigned long type = resource_type(r);
+
+ if (type == IORESOURCE_MEM || type == IORESOURCE_IO)
+ release_resource(r);
+ }
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(nvhost_device_register);
+
+void nvhost_device_unregister(struct nvhost_device *dev)
+{
+ int i;
+ if (dev) {
+ device_del(&dev->dev);
+
+ for (i = 0; i < dev->num_resources; i++) {
+ struct resource *r = &dev->resource[i];
+ unsigned long type = resource_type(r);
+
+ if (type == IORESOURCE_MEM || type == IORESOURCE_IO)
+ release_resource(r);
+ }
+
+ put_device(&dev->dev);
+ }
+}
+EXPORT_SYMBOL_GPL(nvhost_device_unregister);
+
+
+static int nvhost_bus_match(struct device *_dev, struct device_driver *drv)
+{
+ struct nvhost_device *dev = to_nvhost_device(_dev);
+
+ pr_info("host1x: %s %s\n", dev->name, drv->name);
+ return !strncmp(dev->name, drv->name, strlen(drv->name));
+}
+
+#ifdef CONFIG_PM_SLEEP
+
+static int nvhost_legacy_suspend(struct device *dev, pm_message_t mesg)
+{
+ struct nvhost_driver *pdrv = to_nvhost_driver(dev->driver);
+ struct nvhost_device *pdev = to_nvhost_device(dev);
+ int ret = 0;
+
+ if (dev->driver && pdrv->suspend)
+ ret = pdrv->suspend(pdev, mesg);
+
+ return ret;
+}
+
+static int nvhost_legacy_resume(struct device *dev)
+{
+ struct nvhost_driver *pdrv = to_nvhost_driver(dev->driver);
+ struct nvhost_device *pdev = to_nvhost_device(dev);
+ int ret = 0;
+
+ if (dev->driver && pdrv->resume)
+ ret = pdrv->resume(pdev);
+
+ return ret;
+}
+
+static int nvhost_pm_prepare(struct device *dev)
+{
+ struct device_driver *drv = dev->driver;
+ int ret = 0;
+
+ if (drv && drv->pm && drv->pm->prepare)
+ ret = drv->pm->prepare(dev);
+
+ return ret;
+}
+
+static void nvhost_pm_complete(struct device *dev)
+{
+ struct device_driver *drv = dev->driver;
+
+ if (drv && drv->pm && drv->pm->complete)
+ drv->pm->complete(dev);
+}
+
+#else /* !CONFIG_PM_SLEEP */
+
+#define nvhost_pm_prepare NULL
+#define nvhost_pm_complete NULL
+
+#endif /* !CONFIG_PM_SLEEP */
+
+#ifdef CONFIG_SUSPEND
+
+int __weak nvhost_pm_suspend(struct device *dev)
+{
+ struct device_driver *drv = dev->driver;
+ int ret = 0;
+
+ if (!drv)
+ return 0;
+
+ if (drv->pm) {
+ if (drv->pm->suspend)
+ ret = drv->pm->suspend(dev);
+ } else {
+ ret = nvhost_legacy_suspend(dev, PMSG_SUSPEND);
+ }
+
+ return ret;
+}
+
+int __weak nvhost_pm_suspend_noirq(struct device *dev)
+{
+ struct device_driver *drv = dev->driver;
+ int ret = 0;
+
+ if (!drv)
+ return 0;
+
+ if (drv->pm) {
+ if (drv->pm->suspend_noirq)
+ ret = drv->pm->suspend_noirq(dev);
+ }
+
+ return ret;
+}
+
+int __weak nvhost_pm_resume(struct device *dev)
+{
+ struct device_driver *drv = dev->driver;
+ int ret = 0;
+
+ if (!drv)
+ return 0;
+
+ if (drv->pm) {
+ if (drv->pm->resume)
+ ret = drv->pm->resume(dev);
+ } else {
+ ret = nvhost_legacy_resume(dev);
+ }
+
+ return ret;
+}
+
+int __weak nvhost_pm_resume_noirq(struct device *dev)
+{
+ struct device_driver *drv = dev->driver;
+ int ret = 0;
+
+ if (!drv)
+ return 0;
+
+ if (drv->pm) {
+ if (drv->pm->resume_noirq)
+ ret = drv->pm->resume_noirq(dev);
+ }
+
+ return ret;
+}
+
+#else /* !CONFIG_SUSPEND */
+
+#define nvhost_pm_suspend NULL
+#define nvhost_pm_resume NULL
+#define nvhost_pm_suspend_noirq NULL
+#define nvhost_pm_resume_noirq NULL
+
+#endif /* !CONFIG_SUSPEND */
+
+#ifdef CONFIG_HIBERNATION
+
+static int nvhost_pm_freeze(struct device *dev)
+{
+ struct device_driver *drv = dev->driver;
+ int ret = 0;
+
+ if (!drv)
+ return 0;
+
+ if (drv->pm) {
+ if (drv->pm->freeze)
+ ret = drv->pm->freeze(dev);
+ } else {
+ ret = nvhost_legacy_suspend(dev, PMSG_FREEZE);
+ }
+
+ return ret;
+}
+
+static int nvhost_pm_freeze_noirq(struct device *dev)
+{
+ struct device_driver *drv = dev->driver;
+ int ret = 0;
+
+ if (!drv)
+ return 0;
+
+ if (drv->pm) {
+ if (drv->pm->freeze_noirq)
+ ret = drv->pm->freeze_noirq(dev);
+ }
+
+ return ret;
+}
+
+static int nvhost_pm_thaw(struct device *dev)
+{
+ struct device_driver *drv = dev->driver;
+ int ret = 0;
+
+ if (!drv)
+ return 0;
+
+ if (drv->pm) {
+ if (drv->pm->thaw)
+ ret = drv->pm->thaw(dev);
+ } else {
+ ret = nvhost_legacy_resume(dev);
+ }
+
+ return ret;
+}
+
+static int nvhost_pm_thaw_noirq(struct device *dev)
+{
+ struct device_driver *drv = dev->driver;
+ int ret = 0;
+
+ if (!drv)
+ return 0;
+
+ if (drv->pm) {
+ if (drv->pm->thaw_noirq)
+ ret = drv->pm->thaw_noirq(dev);
+ }
+
+ return ret;
+}
+
+static int nvhost_pm_poweroff(struct device *dev)
+{
+ struct device_driver *drv = dev->driver;
+ int ret = 0;
+
+ if (!drv)
+ return 0;
+
+ if (drv->pm) {
+ if (drv->pm->poweroff)
+ ret = drv->pm->poweroff(dev);
+ } else {
+ ret = nvhost_legacy_suspend(dev, PMSG_HIBERNATE);
+ }
+
+ return ret;
+}
+
+static int nvhost_pm_poweroff_noirq(struct device *dev)
+{
+ struct device_driver *drv = dev->driver;
+ int ret = 0;
+
+ if (!drv)
+ return 0;
+
+ if (drv->pm) {
+ if (drv->pm->poweroff_noirq)
+ ret = drv->pm->poweroff_noirq(dev);
+ }
+
+ return ret;
+}
+
+static int nvhost_pm_restore(struct device *dev)
+{
+ struct device_driver *drv = dev->driver;
+ int ret = 0;
+
+ if (!drv)
+ return 0;
+
+ if (drv->pm) {
+ if (drv->pm->restore)
+ ret = drv->pm->restore(dev);
+ } else {
+ ret = nvhost_legacy_resume(dev);
+ }
+
+ return ret;
+}
+
+static int nvhost_pm_restore_noirq(struct device *dev)
+{
+ struct device_driver *drv = dev->driver;
+ int ret = 0;
+
+ if (!drv)
+ return 0;
+
+ if (drv->pm) {
+ if (drv->pm->restore_noirq)
+ ret = drv->pm->restore_noirq(dev);
+ }
+
+ return ret;
+}
+
+#else /* !CONFIG_HIBERNATION */
+
+#define nvhost_pm_freeze NULL
+#define nvhost_pm_thaw NULL
+#define nvhost_pm_poweroff NULL
+#define nvhost_pm_restore NULL
+#define nvhost_pm_freeze_noirq NULL
+#define nvhost_pm_thaw_noirq NULL
+#define nvhost_pm_poweroff_noirq NULL
+#define nvhost_pm_restore_noirq NULL
+
+#endif /* !CONFIG_HIBERNATION */
+
+#ifdef CONFIG_PM_RUNTIME
+
+int __weak nvhost_pm_runtime_suspend(struct device *dev)
+{
+ return pm_generic_runtime_suspend(dev);
+};
+
+int __weak nvhost_pm_runtime_resume(struct device *dev)
+{
+ return pm_generic_runtime_resume(dev);
+};
+
+int __weak nvhost_pm_runtime_idle(struct device *dev)
+{
+ return pm_generic_runtime_idle(dev);
+};
+
+#else /* !CONFIG_PM_RUNTIME */
+
+#define nvhost_pm_runtime_suspend NULL
+#define nvhost_pm_runtime_resume NULL
+#define nvhost_pm_runtime_idle NULL
+
+#endif /* !CONFIG_PM_RUNTIME */
+
+static const struct dev_pm_ops nvhost_dev_pm_ops = {
+ .prepare = nvhost_pm_prepare,
+ .complete = nvhost_pm_complete,
+ .suspend = nvhost_pm_suspend,
+ .resume = nvhost_pm_resume,
+ .freeze = nvhost_pm_freeze,
+ .thaw = nvhost_pm_thaw,
+ .poweroff = nvhost_pm_poweroff,
+ .restore = nvhost_pm_restore,
+ .suspend_noirq = nvhost_pm_suspend_noirq,
+ .resume_noirq = nvhost_pm_resume_noirq,
+ .freeze_noirq = nvhost_pm_freeze_noirq,
+ .thaw_noirq = nvhost_pm_thaw_noirq,
+ .poweroff_noirq = nvhost_pm_poweroff_noirq,
+ .restore_noirq = nvhost_pm_restore_noirq,
+ .runtime_suspend = nvhost_pm_runtime_suspend,
+ .runtime_resume = nvhost_pm_runtime_resume,
+ .runtime_idle = nvhost_pm_runtime_idle,
+};
+
+struct bus_type nvhost_bus_type = {
+ .name = "nvhost",
+ .match = nvhost_bus_match,
+ .pm = &nvhost_dev_pm_ops,
+};
+EXPORT_SYMBOL(nvhost_bus_type);
+
+int nvhost_bus_register(struct nvhost_master *host)
+{
+ nvhost = host;
+
+ return 0;
+}
+
+
+int nvhost_bus_init(void)
+{
+ int err;
+
+ pr_info("host1x bus init\n");
+ err = device_register(&nvhost_bus);
+ if (err)
+ return err;
+
+ err = bus_register(&nvhost_bus_type);
+ if (err)
+ device_unregister(&nvhost_bus);
+
+ return err;
+}
+postcore_initcall(nvhost_bus_init);
+
--- /dev/null
+/*
+ * drivers/video/tegra/host/dev.c
+ *
+ * Tegra Graphics Host Driver Entrypoint
+ *
+ * Copyright (c) 2010, NVIDIA Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+#include "dev.h"
+
+#include <linux/nvhost.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include <linux/spinlock.h>
+#include <linux/fs.h>
+#include <linux/cdev.h>
+#include <linux/platform_device.h>
+#include <linux/uaccess.h>
+#include <linux/file.h>
+#include <linux/nvhost.h>
+
+#include <asm/io.h>
+
+#define DRIVER_NAME "tegra_grhost"
+#define IFACE_NAME "nvhost"
+
+static int __init nvhost_probe(struct platform_device *pdev)
+{
+ struct nvhost_master *host;
+
+ host = kzalloc(sizeof(*host), GFP_KERNEL);
+ if (!host)
+ return -ENOMEM;
+
+ host->pdev = pdev;
+
+ platform_set_drvdata(pdev, host);
+
+ nvhost_bus_register(host);
+
+ dev_info(&pdev->dev, "initialized\n");
+ return 0;
+}
+
+static int __exit nvhost_remove(struct platform_device *pdev)
+{
+ return 0;
+}
+
+static struct platform_driver nvhost_driver = {
+ .probe = nvhost_probe,
+ .remove = __exit_p(nvhost_remove),
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = DRIVER_NAME
+ }
+};
+
+static int __init nvhost_mod_init(void)
+{
+ return platform_driver_register(&nvhost_driver);
+}
+
+static void __exit nvhost_mod_exit(void)
+{
+ platform_driver_unregister(&nvhost_driver);
+}
+
+module_init(nvhost_mod_init);
+module_exit(nvhost_mod_exit);
+
+MODULE_AUTHOR("NVIDIA");
+MODULE_DESCRIPTION("Graphics host driver for Tegra products");
+MODULE_VERSION("1.0");
+MODULE_LICENSE("Dual BSD/GPL");
+MODULE_ALIAS("platform-nvhost");
--- /dev/null
+/*
+ * include/linux/nvhost.h
+ *
+ * Tegra graphics host driver
+ *
+ * Copyright (c) 2009-2010, NVIDIA Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+#ifndef __LINUX_NVHOST_H
+#define __LINUX_NVHOST_H
+
+#include <linux/device.h>
+
+struct nvhost_master;
+
+struct nvhost_device {
+ const char *name;
+ struct device dev;
+ int id;
+ u32 num_resources;
+ struct resource *resource;
+
+ struct nvhost_master *host;
+};
+
+extern int nvhost_device_register(struct nvhost_device *);
+extern void nvhost_device_unregister(struct nvhost_device *);
+
+extern struct bus_type nvhost_bus_type;
+
+struct nvhost_driver {
+ int (*probe)(struct nvhost_device *);
+ int (*remove)(struct nvhost_device *);
+ void (*shutdown)(struct nvhost_device *);
+ int (*suspend)(struct nvhost_device *, pm_message_t state);
+ int (*resume)(struct nvhost_device *);
+ struct device_driver driver;
+};
+
+extern int nvhost_driver_register(struct nvhost_driver *);
+extern void nvhost_driver_unregister(struct nvhost_driver *);
+extern struct resource *nvhost_get_resource(struct nvhost_device *, unsigned int, unsigned int);
+extern int nvhost_get_irq(struct nvhost_device *, unsigned int);
+extern struct resource *nvhost_get_resource_byname(struct nvhost_device *, unsigned int, const char *);
+extern int nvhost_get_irq_byname(struct nvhost_device *, const char *);
+
+#define to_nvhost_device(x) container_of((x), struct nvhost_device, dev)
+#define to_nvhost_driver(drv) (container_of((drv), struct nvhost_driver, \
+ driver))
+
+#define nvhost_get_drvdata(_dev) dev_get_drvdata(&(_dev)->dev)
+#define nvhost_set_drvdata(_dev,data) dev_set_drvdata(&(_dev)->dev, (data))
+
+int nvhost_bus_register(struct nvhost_master *host);
+#endif
projects / firefly-linux-kernel-4.4.55.git / commitdiff