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/*
* drivers/video/tegra/host/dev.c
*
* Tegra Graphics Host Driver Entrypoint
*
* Copyright (c) 2010-2012, NVIDIA Corporation.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope 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, see <http://www.gnu.org/licenses/>.
*/
#define CREATE_TRACE_POINTS
#include <trace/events/nvhost.h>
#include <linux/module.h>
#include <linux/io.h>
#include <linux/nvhost.h>
#include <linux/list.h>
#include <linux/slab.h>
#include <mach/gpufuse.h>
/* host1x device list is used in 2 places:
* 1. In ioctl(NVHOST_IOCTL_CTRL_MODULE_REGRDWR) of host1x device
* 2. debug-fs dump of host1x and client device
* as well as channel state */
struct nvhost_device_list {
struct list_head list;
struct platform_device *pdev;
};
/* HEAD for the host1x device list */
static struct nvhost_device_list ndev_head;
/* Constructor for the host1x device list */
void nvhost_device_list_init(void)
{
INIT_LIST_HEAD(&ndev_head.list);
}
/* Adds a device to tail of host1x device list */
int nvhost_device_list_add(struct platform_device *pdev)
{
struct nvhost_device_list *list;
list = kzalloc(sizeof(struct nvhost_device_list), GFP_KERNEL);
if (!list)
return -ENOMEM;
list->pdev = pdev;
list_add_tail(&list->list, &ndev_head.list);
return 0;
}
/* Iterator function for host1x device list
* It takes a fptr as an argument and calls that function for each
* device in the list */
void nvhost_device_list_for_all(void *data,
int (*fptr)(struct platform_device *pdev, void *fdata))
{
struct list_head *pos;
struct nvhost_device_list *nlist;
int ret;
list_for_each(pos, &ndev_head.list) {
nlist = list_entry(pos, struct nvhost_device_list, list);
if (nlist && nlist->pdev && fptr) {
ret = fptr(nlist->pdev, data);
if (ret) {
pr_info("%s: iterator error\n", __func__);
break;
}
}
}
}
/* Simple search function for the host1x device list
* It takes the moduleid as argument and returns a pointer to host1x
* device that matches the moduleid otherwise returns NULL */
struct platform_device *nvhost_device_list_match_by_id(u32 id)
{
struct list_head *pos;
struct nvhost_device_list *nlist;
struct nvhost_device_data *pdata;
list_for_each(pos, &ndev_head.list) {
nlist = list_entry(pos, struct nvhost_device_list, list);
if (nlist && nlist->pdev) {
pdata = platform_get_drvdata(nlist->pdev);
if (pdata && (pdata->moduleid == id))
return nlist->pdev;
}
}
return NULL;
}
/* Removes a device from the host1x device list */
void nvhost_device_list_remove(struct platform_device *pdev)
{
struct list_head *pos;
struct nvhost_device_list *nlist;
list_for_each(pos, &ndev_head.list) {
nlist = list_entry(pos, struct nvhost_device_list, list);
if (nlist && nlist->pdev == pdev) {
list_del(&nlist->list);
kfree(nlist);
}
}
}
static unsigned int register_sets = 2;
void nvhost_set_register_sets(unsigned int r)
{
register_sets = r;
}
void nvhost_device_writel(struct platform_device *dev, u32 r, u32 v)
{
struct nvhost_device_data *pdata = platform_get_drvdata(dev);
writel(v, pdata->aperture + r);
}
EXPORT_SYMBOL_GPL(nvhost_device_writel);
u32 nvhost_device_readl(struct platform_device *dev, u32 r)
{
struct nvhost_device_data *pdata = platform_get_drvdata(dev);
return readl(pdata->aperture + r);
}
EXPORT_SYMBOL_GPL(nvhost_device_readl);
module_param_call(register_sets, NULL, param_get_uint, ®ister_sets, 0444);
MODULE_PARM_DESC(register_sets, "Number of register sets");
MODULE_AUTHOR("NVIDIA");
MODULE_DESCRIPTION("Graphics host driver for Tegra products");
MODULE_VERSION("1.0");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform-nvhost");
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