staging: android: ion: Add ion driver for Hi6220 SoC platform (2b40182a) · Commits · git / linux-net

drivers/staging/android/ion/Kconfig

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Original line number	Diff line number	Diff line
		@@ -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"

drivers/staging/android/ion/Makefile

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Original line number	Diff line number	Diff line
		@@ -7,4 +7,5 @@ endif

		obj-$(CONFIG_ION_DUMMY) += ion_dummy_driver.o
		obj-$(CONFIG_ION_TEGRA) += tegra/
		obj-$(CONFIG_ION_HISI) += hisilicon/

drivers/staging/android/ion/hisilicon/Kconfig

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		config HI6220_ION
		bool "Hi6220 ION Driver"
		depends on ARCH_HISI && ION
		help
		Build the Hisilicon Hi6220 ion driver.

drivers/staging/android/ion/hisilicon/Makefile

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		obj-$(CONFIG_HI6220_ION) += hi6220_ion.o

drivers/staging/android/ion/hisilicon/hi6220_ion.c

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		/*
		* 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);