126 lines
3.1 KiB
C
126 lines
3.1 KiB
C
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/* Copyright (c) 2014, The Linux Foundation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 and
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* only version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/of.h>
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#include <linux/of_device.h>
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#include <linux/dma-mapping.h>
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#include <linux/slab.h>
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#include <soc/qcom/memory_dump.h>
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static int cpuss_dump_probe(struct platform_device *pdev)
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{
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struct device_node *child_node, *dump_node;
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const struct device_node *node = pdev->dev.of_node;
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static dma_addr_t dump_addr;
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static void *dump_vaddr;
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struct msm_dump_data *dump_data;
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struct msm_dump_entry dump_entry;
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int ret;
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u32 size, id;
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for_each_available_child_of_node(node, child_node) {
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dump_node = of_parse_phandle(child_node, "qcom,dump-node", 0);
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if (!dump_node) {
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dev_err(&pdev->dev, "Unable to find node for %s\n",
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child_node->name);
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continue;
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}
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ret = of_property_read_u32(dump_node, "qcom,dump-size", &size);
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if (ret) {
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dev_err(&pdev->dev, "Unable to find size for %s\n",
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dump_node->name);
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continue;
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}
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ret = of_property_read_u32(child_node, "qcom,dump-id", &id);
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if (ret) {
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dev_err(&pdev->dev, "Unable to find id for %s\n",
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child_node->name);
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continue;
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}
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dump_vaddr = (void *) dma_alloc_coherent(&pdev->dev, size,
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&dump_addr, GFP_KERNEL);
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if (!dump_vaddr) {
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dev_err(&pdev->dev, "Couldn't get memory for dumping\n");
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continue;
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}
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memset(dump_vaddr, 0x0, size);
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dump_data = devm_kzalloc(&pdev->dev,
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sizeof(struct msm_dump_data), GFP_KERNEL);
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if (!dump_data) {
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dev_err(&pdev->dev, "Dump data allocation failed\n");
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dma_free_coherent(&pdev->dev, size, dump_vaddr,
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dump_addr);
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continue;
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}
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dump_data->addr = dump_addr;
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dump_data->len = size;
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dump_entry.id = id;
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dump_entry.addr = virt_to_phys(dump_data);
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ret = msm_dump_data_register(MSM_DUMP_TABLE_APPS, &dump_entry);
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if (ret) {
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dev_err(&pdev->dev, "Data dump setup failed, id = %d\n",
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id);
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dma_free_coherent(&pdev->dev, size, dump_vaddr,
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dump_addr);
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devm_kfree(&pdev->dev, dump_data);
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}
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}
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return 0;
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}
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static int cpuss_dump_remove(struct platform_device *pdev)
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{
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return 0;
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}
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static struct of_device_id cpuss_dump_match_table[] = {
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{ .compatible = "qcom,cpuss-dump", },
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{}
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};
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static struct platform_driver cpuss_dump_driver = {
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.probe = cpuss_dump_probe,
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.remove = cpuss_dump_remove,
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.driver = {
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.name = "msm_cpuss_dump",
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.owner = THIS_MODULE,
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.of_match_table = cpuss_dump_match_table,
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},
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};
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static int __init cpuss_dump_init(void)
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{
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return platform_driver_register(&cpuss_dump_driver);
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}
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static void __exit cpuss_dump_exit(void)
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{
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platform_driver_unregister(&cpuss_dump_driver);
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}
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subsys_initcall(cpuss_dump_init);
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module_exit(cpuss_dump_exit)
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