Lingutla Chandrasekhar | be48b07 | 2017-09-25 19:07:12 +0530 | [diff] [blame] | 1 | /* Copyright (c) 2014-2017, The Linux Foundation. All rights reserved. |
Channagoud Kadabi | 7e8d55a | 2016-08-23 14:04:44 -0700 | [diff] [blame] | 2 | * |
| 3 | * This program is free software; you can redistribute it and/or modify |
| 4 | * it under the terms of the GNU General Public License version 2 and |
| 5 | * only version 2 as published by the Free Software Foundation. |
| 6 | * |
| 7 | * This program is distributed in the hope that it will be useful, |
| 8 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 9 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 10 | * GNU General Public License for more details. |
| 11 | * |
| 12 | */ |
| 13 | |
| 14 | #include <linux/module.h> |
| 15 | #include <linux/kernel.h> |
| 16 | #include <linux/init.h> |
| 17 | #include <linux/of.h> |
| 18 | #include <linux/of_device.h> |
| 19 | #include <linux/dma-mapping.h> |
| 20 | #include <linux/slab.h> |
| 21 | #include <soc/qcom/memory_dump.h> |
| 22 | |
| 23 | static int cpuss_dump_probe(struct platform_device *pdev) |
| 24 | { |
| 25 | struct device_node *child_node, *dump_node; |
| 26 | const struct device_node *node = pdev->dev.of_node; |
| 27 | static dma_addr_t dump_addr; |
| 28 | static void *dump_vaddr; |
| 29 | struct msm_dump_data *dump_data; |
| 30 | struct msm_dump_entry dump_entry; |
| 31 | int ret; |
| 32 | u32 size, id; |
| 33 | |
| 34 | for_each_available_child_of_node(node, child_node) { |
| 35 | dump_node = of_parse_phandle(child_node, "qcom,dump-node", 0); |
| 36 | |
| 37 | if (!dump_node) { |
| 38 | dev_err(&pdev->dev, "Unable to find node for %s\n", |
| 39 | child_node->name); |
| 40 | continue; |
| 41 | } |
| 42 | |
| 43 | ret = of_property_read_u32(dump_node, "qcom,dump-size", &size); |
| 44 | if (ret) { |
| 45 | dev_err(&pdev->dev, "Unable to find size for %s\n", |
| 46 | dump_node->name); |
| 47 | continue; |
| 48 | } |
| 49 | |
| 50 | ret = of_property_read_u32(child_node, "qcom,dump-id", &id); |
| 51 | if (ret) { |
| 52 | dev_err(&pdev->dev, "Unable to find id for %s\n", |
| 53 | child_node->name); |
| 54 | continue; |
| 55 | } |
| 56 | |
| 57 | dump_vaddr = (void *) dma_alloc_coherent(&pdev->dev, size, |
| 58 | &dump_addr, GFP_KERNEL); |
| 59 | |
| 60 | if (!dump_vaddr) { |
| 61 | dev_err(&pdev->dev, "Couldn't get memory for dumping\n"); |
| 62 | continue; |
| 63 | } |
| 64 | |
| 65 | memset(dump_vaddr, 0x0, size); |
| 66 | |
| 67 | dump_data = devm_kzalloc(&pdev->dev, |
| 68 | sizeof(struct msm_dump_data), GFP_KERNEL); |
| 69 | if (!dump_data) { |
| 70 | dma_free_coherent(&pdev->dev, size, dump_vaddr, |
| 71 | dump_addr); |
| 72 | continue; |
| 73 | } |
| 74 | |
| 75 | dump_data->addr = dump_addr; |
| 76 | dump_data->len = size; |
Lingutla Chandrasekhar | be48b07 | 2017-09-25 19:07:12 +0530 | [diff] [blame] | 77 | scnprintf(dump_data->name, sizeof(dump_data->name), |
| 78 | "KCPUSS%X", id); |
Channagoud Kadabi | 7e8d55a | 2016-08-23 14:04:44 -0700 | [diff] [blame] | 79 | dump_entry.id = id; |
| 80 | dump_entry.addr = virt_to_phys(dump_data); |
| 81 | ret = msm_dump_data_register(MSM_DUMP_TABLE_APPS, &dump_entry); |
| 82 | if (ret) { |
| 83 | dev_err(&pdev->dev, "Data dump setup failed, id = %d\n", |
| 84 | id); |
| 85 | dma_free_coherent(&pdev->dev, size, dump_vaddr, |
| 86 | dump_addr); |
| 87 | devm_kfree(&pdev->dev, dump_data); |
| 88 | } |
| 89 | |
| 90 | } |
| 91 | return 0; |
| 92 | } |
| 93 | |
| 94 | static int cpuss_dump_remove(struct platform_device *pdev) |
| 95 | { |
| 96 | return 0; |
| 97 | } |
| 98 | |
| 99 | static const struct of_device_id cpuss_dump_match_table[] = { |
| 100 | { .compatible = "qcom,cpuss-dump", }, |
| 101 | {} |
| 102 | }; |
| 103 | |
| 104 | static struct platform_driver cpuss_dump_driver = { |
| 105 | .probe = cpuss_dump_probe, |
| 106 | .remove = cpuss_dump_remove, |
| 107 | .driver = { |
| 108 | .name = "msm_cpuss_dump", |
| 109 | .owner = THIS_MODULE, |
| 110 | .of_match_table = cpuss_dump_match_table, |
| 111 | }, |
| 112 | }; |
| 113 | |
| 114 | static int __init cpuss_dump_init(void) |
| 115 | { |
| 116 | return platform_driver_register(&cpuss_dump_driver); |
| 117 | } |
| 118 | |
| 119 | static void __exit cpuss_dump_exit(void) |
| 120 | { |
| 121 | platform_driver_unregister(&cpuss_dump_driver); |
| 122 | } |
| 123 | |
| 124 | subsys_initcall(cpuss_dump_init); |
| 125 | module_exit(cpuss_dump_exit) |
| 126 | |