| Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1 | /* Copyright (c) 2009, Code Aurora Forum. All rights reserved. |
| 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 | /* |
| 15 | * PROC COMM TEST Driver source file |
| 16 | */ |
| 17 | |
| 18 | #include <linux/types.h> |
| 19 | #include <linux/uaccess.h> |
| 20 | #include <linux/debugfs.h> |
| 21 | #include <linux/module.h> |
| 22 | #include "proc_comm.h" |
| 23 | |
| 24 | static struct dentry *dent; |
| 25 | static int proc_comm_test_res; |
| 26 | |
| 27 | static int proc_comm_reverse_test(void) |
| 28 | { |
| 29 | uint32_t data1, data2; |
| 30 | int rc; |
| 31 | |
| 32 | data1 = 10; |
| 33 | data2 = 20; |
| 34 | |
| 35 | rc = msm_proc_comm(PCOM_OEM_TEST_CMD, &data1, &data2); |
| 36 | if (rc) |
| 37 | return rc; |
| 38 | |
| 39 | if ((data1 != 20) || (data2 != 10)) |
| 40 | return -1; |
| 41 | |
| 42 | return 0; |
| 43 | } |
| 44 | |
| 45 | static ssize_t debug_read(struct file *fp, char __user *buf, |
| 46 | size_t count, loff_t *pos) |
| 47 | { |
| 48 | char _buf[16]; |
| 49 | |
| 50 | snprintf(_buf, sizeof(_buf), "%i\n", proc_comm_test_res); |
| 51 | |
| 52 | return simple_read_from_buffer(buf, count, pos, _buf, strlen(_buf)); |
| 53 | } |
| 54 | |
| 55 | static ssize_t debug_write(struct file *fp, const char __user *buf, |
| 56 | size_t count, loff_t *pos) |
| 57 | { |
| 58 | |
| 59 | unsigned char cmd[64]; |
| 60 | int len; |
| 61 | |
| 62 | if (count < 1) |
| 63 | return 0; |
| 64 | |
| 65 | len = count > 63 ? 63 : count; |
| 66 | |
| 67 | if (copy_from_user(cmd, buf, len)) |
| 68 | return -EFAULT; |
| 69 | |
| 70 | cmd[len] = 0; |
| 71 | |
| 72 | if (cmd[len-1] == '\n') { |
| 73 | cmd[len-1] = 0; |
| 74 | len--; |
| 75 | } |
| 76 | |
| 77 | if (!strncmp(cmd, "reverse_test", 64)) |
| 78 | proc_comm_test_res = proc_comm_reverse_test(); |
| 79 | else |
| 80 | proc_comm_test_res = -EINVAL; |
| 81 | |
| 82 | if (proc_comm_test_res) |
| 83 | pr_err("proc comm test fail %d\n", |
| 84 | proc_comm_test_res); |
| 85 | else |
| 86 | pr_info("proc comm test passed\n"); |
| 87 | |
| 88 | return count; |
| 89 | } |
| 90 | |
| 91 | static int debug_release(struct inode *ip, struct file *fp) |
| 92 | { |
| 93 | return 0; |
| 94 | } |
| 95 | |
| 96 | static int debug_open(struct inode *ip, struct file *fp) |
| 97 | { |
| 98 | return 0; |
| 99 | } |
| 100 | |
| 101 | static const struct file_operations debug_ops = { |
| 102 | .owner = THIS_MODULE, |
| 103 | .open = debug_open, |
| 104 | .release = debug_release, |
| 105 | .read = debug_read, |
| 106 | .write = debug_write, |
| 107 | }; |
| 108 | |
| 109 | static void __exit proc_comm_test_mod_exit(void) |
| 110 | { |
| 111 | debugfs_remove(dent); |
| 112 | } |
| 113 | |
| 114 | static int __init proc_comm_test_mod_init(void) |
| 115 | { |
| 116 | dent = debugfs_create_file("proc_comm", 0444, 0, NULL, &debug_ops); |
| 117 | proc_comm_test_res = -1; |
| 118 | return 0; |
| 119 | } |
| 120 | |
| 121 | module_init(proc_comm_test_mod_init); |
| 122 | module_exit(proc_comm_test_mod_exit); |
| 123 | |
| 124 | MODULE_DESCRIPTION("PROC COMM TEST Driver"); |
| 125 | MODULE_LICENSE("GPL v2"); |