Commit 2b40182a authored by Chen Feng's avatar Chen Feng Committed by Greg Kroah-Hartman
Browse files

staging: android: ion: Add ion driver for Hi6220 SoC platform



Add ion support for hi6220 SoC platform.
Signed-off-by: default avatarChen Feng <puck.chen@hisilicon.com>
Signed-off-by: default avatarYu Dongbin <yudongbin@hisilicon.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent d9c0e6c1
......@@ -33,3 +33,10 @@ config ION_TEGRA
help
Choose this option if you wish to use ion on an nVidia Tegra.
config ION_HISI
tristate "Ion for Hisilicon"
depends on ARCH_HISI && ION
help
Choose this option if you wish to use ion on Hisilicon Platform.
source "drivers/staging/android/ion/hisilicon/Kconfig"
......@@ -7,4 +7,5 @@ endif
obj-$(CONFIG_ION_DUMMY) += ion_dummy_driver.o
obj-$(CONFIG_ION_TEGRA) += tegra/
obj-$(CONFIG_ION_HISI) += hisilicon/
config HI6220_ION
bool "Hi6220 ION Driver"
depends on ARCH_HISI && ION
help
Build the Hisilicon Hi6220 ion driver.
obj-$(CONFIG_HI6220_ION) += hi6220_ion.o
/*
* Hisilicon Hi6220 ION Driver
*
* Copyright (c) 2015 Hisilicon Limited.
*
* Author: Chen Feng <puck.chen@hisilicon.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#define pr_fmt(fmt) "Ion: " fmt
#include <linux/err.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/of.h>
#include <linux/mm.h>
#include "../ion_priv.h"
#include "../ion.h"
struct hi6220_ion_type_table {
const char *name;
enum ion_heap_type type;
};
static struct hi6220_ion_type_table ion_type_table[] = {
{"ion_system", ION_HEAP_TYPE_SYSTEM},
{"ion_system_contig", ION_HEAP_TYPE_SYSTEM_CONTIG},
{"ion_carveout", ION_HEAP_TYPE_CARVEOUT},
{"ion_chunk", ION_HEAP_TYPE_CHUNK},
{"ion_dma", ION_HEAP_TYPE_DMA},
{"ion_custom", ION_HEAP_TYPE_CUSTOM},
};
static struct ion_device *idev;
static int num_heaps;
static struct ion_heap **heaps;
static struct ion_platform_heap **heaps_data;
static int get_type_by_name(const char *name, enum ion_heap_type *type)
{
int i;
for (i = 0; i < ARRAY_SIZE(ion_type_table); i++) {
if (strncmp(name, ion_type_table[i].name, strlen(name)))
continue;
*type = ion_type_table[i].type;
return 0;
}
return -EINVAL;
}
static int hi6220_set_platform_data(struct platform_device *pdev)
{
unsigned int base;
unsigned int size;
unsigned int id;
const char *heap_name;
const char *type_name;
enum ion_heap_type type;
int ret;
struct device_node *np;
struct ion_platform_heap *p_data;
const struct device_node *dt_node = pdev->dev.of_node;
int index = 0;
for_each_child_of_node(dt_node, np)
num_heaps++;
heaps_data = devm_kzalloc(&pdev->dev,
sizeof(struct ion_platform_heap *) *
num_heaps,
GFP_KERNEL);
if (!heaps_data)
return -ENOMEM;
for_each_child_of_node(dt_node, np) {
ret = of_property_read_string(np, "heap-name", &heap_name);
if (ret < 0) {
pr_err("check the name of node %s\n", np->name);
continue;
}
ret = of_property_read_u32(np, "heap-id", &id);
if (ret < 0) {
pr_err("check the id %s\n", np->name);
continue;
}
ret = of_property_read_u32(np, "heap-base", &base);
if (ret < 0) {
pr_err("check the base of node %s\n", np->name);
continue;
}
ret = of_property_read_u32(np, "heap-size", &size);
if (ret < 0) {
pr_err("check the size of node %s\n", np->name);
continue;
}
ret = of_property_read_string(np, "heap-type", &type_name);
if (ret < 0) {
pr_err("check the type of node %s\n", np->name);
continue;
}
ret = get_type_by_name(type_name, &type);
if (ret < 0) {
pr_err("type name error %s!\n", type_name);
continue;
}
pr_info("heap index %d : name %s base 0x%x size 0x%x id %d type %d\n",
index, heap_name, base, size, id, type);
p_data = devm_kzalloc(&pdev->dev,
sizeof(struct ion_platform_heap),
GFP_KERNEL);
if (!p_data)
return -ENOMEM;
p_data->name = heap_name;
p_data->base = base;
p_data->size = size;
p_data->id = id;
p_data->type = type;
heaps_data[index] = p_data;
index++;
}
return 0;
}
static int hi6220_ion_probe(struct platform_device *pdev)
{
int i;
int err;
static struct ion_platform_heap *p_heap;
idev = ion_device_create(NULL);
err = hi6220_set_platform_data(pdev);
if (err) {
pr_err("ion set platform data error!\n");
goto err_free_idev;
}
heaps = devm_kzalloc(&pdev->dev,
sizeof(struct ion_heap *) * num_heaps,
GFP_KERNEL);
if (!heaps) {
err = -ENOMEM;
goto err_free_idev;
}
/*
* create the heaps as specified in the dts file
*/
for (i = 0; i < num_heaps; i++) {
p_heap = heaps_data[i];
heaps[i] = ion_heap_create(p_heap);
if (IS_ERR_OR_NULL(heaps[i])) {
err = PTR_ERR(heaps[i]);
goto err_free_heaps;
}
ion_device_add_heap(idev, heaps[i]);
pr_info("%s: adding heap %s of type %d with %lx@%lx\n",
__func__, p_heap->name, p_heap->type,
p_heap->base, (unsigned long)p_heap->size);
}
return err;
err_free_heaps:
for (i = 0; i < num_heaps; ++i) {
ion_heap_destroy(heaps[i]);
heaps[i] = NULL;
}
err_free_idev:
ion_device_destroy(idev);
return err;
}
static int hi6220_ion_remove(struct platform_device *pdev)
{
int i;
for (i = 0; i < num_heaps; i++) {
ion_heap_destroy(heaps[i]);
heaps[i] = NULL;
}
ion_device_destroy(idev);
return 0;
}
static const struct of_device_id hi6220_ion_match_table[] = {
{.compatible = "hisilicon,hi6220-ion"},
{},
};
static struct platform_driver hi6220_ion_driver = {
.probe = hi6220_ion_probe,
.remove = hi6220_ion_remove,
.driver = {
.name = "ion-hi6220",
.of_match_table = hi6220_ion_match_table,
},
};
static int __init hi6220_ion_init(void)
{
int ret;
ret = platform_driver_register(&hi6220_ion_driver);
return ret;
}
subsys_initcall(hi6220_ion_init);
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