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- #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) {
- 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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