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/* Copyright (c) 2014-2017, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only version 2 as published by the Free Software Foundation.
*
* 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/kernel.h>
#include <linux/init.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/dma-mapping.h>
#include <linux/slab.h>
#include <soc/qcom/memory_dump.h>
static int cpuss_dump_probe(struct platform_device *pdev)
{
struct device_node *child_node, *dump_node;
const struct device_node *node = pdev->dev.of_node;
static dma_addr_t dump_addr;
static void *dump_vaddr;
struct msm_dump_data *dump_data;
struct msm_dump_entry dump_entry;
int ret;
u32 size, id;
for_each_available_child_of_node(node, child_node) {
dump_node = of_parse_phandle(child_node, "qcom,dump-node", 0);
if (!dump_node) {
dev_err(&pdev->dev, "Unable to find node for %s\n",
child_node->name);
continue;
}
ret = of_property_read_u32(dump_node, "qcom,dump-size", &size);
if (ret) {
dev_err(&pdev->dev, "Unable to find size for %s\n",
dump_node->name);
continue;
}
ret = of_property_read_u32(child_node, "qcom,dump-id", &id);
if (ret) {
dev_err(&pdev->dev, "Unable to find id for %s\n",
child_node->name);
continue;
}
dump_vaddr = (void *) dma_alloc_coherent(&pdev->dev, size,
&dump_addr, GFP_KERNEL);
if (!dump_vaddr) {
dev_err(&pdev->dev, "Couldn't get memory for dumping\n");
continue;
}
memset(dump_vaddr, 0x0, size);
dump_data = devm_kzalloc(&pdev->dev,
sizeof(struct msm_dump_data), GFP_KERNEL);
if (!dump_data) {
dev_err(&pdev->dev, "Dump data allocation failed\n");
dma_free_coherent(&pdev->dev, size, dump_vaddr,
dump_addr);
continue;
}
dump_data->addr = dump_addr;
dump_data->len = size;
scnprintf(dump_data->name, sizeof(dump_data->name),
"KCPUSS%X", id);
dump_entry.id = id;
dump_entry.addr = virt_to_phys(dump_data);
ret = msm_dump_data_register(MSM_DUMP_TABLE_APPS, &dump_entry);
if (ret) {
dev_err(&pdev->dev, "Data dump setup failed, id = %d\n",
id);
dma_free_coherent(&pdev->dev, size, dump_vaddr,
dump_addr);
devm_kfree(&pdev->dev, dump_data);
}
}
return 0;
}
static int cpuss_dump_remove(struct platform_device *pdev)
{
return 0;
}
static const struct of_device_id cpuss_dump_match_table[] = {
{ .compatible = "qcom,cpuss-dump", },
{}
};
static struct platform_driver cpuss_dump_driver = {
.probe = cpuss_dump_probe,
.remove = cpuss_dump_remove,
.driver = {
.name = "msm_cpuss_dump",
.owner = THIS_MODULE,
.of_match_table = cpuss_dump_match_table,
},
};
static int __init cpuss_dump_init(void)
{
return platform_driver_register(&cpuss_dump_driver);
}
static void __exit cpuss_dump_exit(void)
{
platform_driver_unregister(&cpuss_dump_driver);
}
subsys_initcall(cpuss_dump_init);
module_exit(cpuss_dump_exit)
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