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/*
* drivers/staging/android/ion/rockchip/rockchip_ion.c
*
* Copyright (C) 2014 ROCKCHIP, Inc.
*
* 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/module.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/dma-buf.h>
#include <linux/dma-contiguous.h>
#include <linux/of.h>
#include <linux/of_reserved_mem.h>
#include <linux/rockchip_ion.h>
#include "../ion_priv.h"
struct ion_device *rockchip_ion_dev;
static struct ion_heap **heaps;
struct ion_heap_desc {
unsigned int id;
enum ion_heap_type type;
const char *name;
};
static struct ion_heap_desc ion_heap_meta[] = {
{
.id = ION_HEAP_TYPE_SYSTEM,
.type = ION_HEAP_TYPE_SYSTEM,
.name = "system-heap",
}, {
.id = ION_HEAP_TYPE_CARVEOUT,
.type = ION_HEAP_TYPE_CARVEOUT,
.name = "carveout-heap",
}, {
.id = ION_HEAP_TYPE_DMA,
.type = ION_HEAP_TYPE_DMA,
.name = "cma-heap",
},
};
/* Return result of step for heap array. */
static int rk_ion_of_heap(struct ion_platform_heap *myheap,
struct device_node *node)
{
unsigned int reg[2] = {0,};
int itype;
for (itype = 0; itype < ARRAY_SIZE(ion_heap_meta); itype++) {
if (strcmp(ion_heap_meta[itype].name, node->name))
continue;
myheap->name = node->name;
myheap->align = SZ_1M;
myheap->id = ion_heap_meta[itype].id;
if (!strcmp("cma-heap", node->name)) {
myheap->type = ION_HEAP_TYPE_DMA;
if (!of_property_read_u32_array(node, "reg", reg, 2)) {
myheap->base = reg[0];
myheap->size = reg[1];
}
return 1;
}
if (!strcmp("system-heap", node->name)) {
myheap->type = ION_HEAP_TYPE_SYSTEM;
return 1;
}
}
return 0;
}
static struct ion_platform_data *rk_ion_of(struct device_node *node)
{
struct ion_platform_data *pdata;
int iheap = 0;
struct device_node *child;
struct ion_platform_heap *myheap;
pdata = kzalloc(sizeof(*pdata), GFP_KERNEL);
if (!pdata)
return NULL;
pdata->nr = of_get_child_count(node);
again:
pdata->heaps = kcalloc(pdata->nr, sizeof(*myheap), GFP_KERNEL);
for_each_child_of_node(node, child) {
iheap += rk_ion_of_heap(&pdata->heaps[iheap], child);
}
if (pdata->nr != iheap) {
pdata->nr = iheap;
iheap = 0;
kfree(pdata->heaps);
pr_err("%s: mismatch, repeating\n", __func__);
goto again;
}
return pdata;
}
static int rk_ion_probe(struct platform_device *pdev)
{
int err;
int i;
struct ion_platform_data *pdata = pdev->dev.platform_data;
struct ion_device *idev;
err = of_reserved_mem_device_init(&pdev->dev);
if (err)
pr_debug("No reserved memory region assign to ion\n");
if (!pdata) {
pdata = rk_ion_of(pdev->dev.of_node);
pdev->dev.platform_data = pdata;
}
heaps = kcalloc(pdata->nr, sizeof(*heaps), GFP_KERNEL);
idev = ion_device_create(NULL);
if (IS_ERR_OR_NULL(idev)) {
kfree(heaps);
return PTR_ERR(idev);
}
ion_device_set_platform(idev, &pdev->dev);
rockchip_ion_dev = idev;
/* create the heaps as specified in the board file */
for (i = 0; i < pdata->nr; i++) {
struct ion_platform_heap *heap_data = &pdata->heaps[i];
heap_data->priv = &pdev->dev;
heaps[i] = ion_heap_create(heap_data);
if (IS_ERR_OR_NULL(heaps[i])) {
err = PTR_ERR(heaps[i]);
goto err;
}
pr_info("rockchip ion: success to create - %s\n",
heaps[i]->name);
ion_device_add_heap(idev, heaps[i]);
}
platform_set_drvdata(pdev, idev);
return 0;
err:
for (i = 0; i < pdata->nr; i++) {
if (heaps[i])
ion_heap_destroy(heaps[i]);
}
kfree(heaps);
return err;
}
static int rk_ion_remove(struct platform_device *pdev)
{
struct ion_platform_data *pdata = pdev->dev.platform_data;
struct ion_device *idev = platform_get_drvdata(pdev);
int i;
ion_device_destroy(idev);
for (i = 0; i < pdata->nr; i++)
ion_heap_destroy(heaps[i]);
kfree(heaps);
return 0;
}
struct ion_client *rockchip_ion_client_create(const char *name)
{
if (!rockchip_ion_dev) {
pr_err("rockchip ion idev is NULL\n");
return NULL;
}
return ion_client_create(rockchip_ion_dev, name);
}
EXPORT_SYMBOL_GPL(rockchip_ion_client_create);
static const struct of_device_id rk_ion_match[] = {
{ .compatible = "rockchip,ion", },
{}
};
static struct platform_driver ion_driver = {
.probe = rk_ion_probe,
.remove = rk_ion_remove,
.driver = {
.name = "ion-rk",
.owner = THIS_MODULE,
.of_match_table = of_match_ptr(rk_ion_match),
},
};
static int __init rk_ion_init(void)
{
return platform_driver_register(&ion_driver);
}
static void __exit rk_ion_exit(void)
{
platform_driver_unregister(&ion_driver);
}
subsys_initcall(rk_ion_init);
module_exit(rk_ion_exit);
MODULE_AUTHOR("Meiyou.chen <cmy@rock-chips.com>");
MODULE_DESCRIPTION("ROCKCHIP Ion driver");
MODULE_LICENSE("GPL v2");
MODULE_DEVICE_TABLE(of, rk_ion_match);
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