drivers/misc/mic/card/mic_debugfs.c

   1 /*
   2  * Intel MIC Platform Software Stack (MPSS)
   3  *
   4  * Copyright(c) 2013 Intel Corporation.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License, version 2, as
   8  * published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  13  * General Public License for more details.
  14  *
  15  * The full GNU General Public License is included in this distribution in
  16  * the file called "COPYING".
  17  *
  18  * Disclaimer: The codes contained in these modules may be specific to
  19  * the Intel Software Development Platform codenamed: Knights Ferry, and
  20  * the Intel product codenamed: Knights Corner, and are not backward
  21  * compatible with other Intel products. Additionally, Intel will NOT
  22  * support the codes or instruction set in future products.
  23  *
  24  * Intel MIC Card driver.
  25  *
  26  */
  27 #include <linux/debugfs.h>
  28 #include <linux/delay.h>
  29 #include <linux/seq_file.h>
  30 #include <linux/interrupt.h>
  31 #include <linux/device.h>
  32
  33 #include "../common/mic_dev.h"
  34 #include "mic_device.h"
  35
  36 /* Debugfs parent dir */
  37 static struct dentry *mic_dbg;
  38
  39 /**
  40  * mic_intr_test - Send interrupts to host.
  41  */
  42 static int mic_intr_test(struct seq_file *s, void *unused)
  43 {
  44         struct mic_driver *mdrv = s->private;
  45         struct mic_device *mdev = &mdrv->mdev;
  46
  47         mic_send_intr(mdev, 0);
  48         msleep(1000);
  49         mic_send_intr(mdev, 1);
  50         msleep(1000);
  51         mic_send_intr(mdev, 2);
  52         msleep(1000);
  53         mic_send_intr(mdev, 3);
  54         msleep(1000);
  55
  56         return 0;
  57 }
  58
  59 static int mic_intr_test_open(struct inode *inode, struct file *file)
  60 {
  61         return single_open(file, mic_intr_test, inode->i_private);
  62 }
  63
  64 static int mic_intr_test_release(struct inode *inode, struct file *file)
  65 {
  66         return single_release(inode, file);
  67 }
  68
  69 static const struct file_operations intr_test_ops = {
  70         .owner   = THIS_MODULE,
  71         .open    = mic_intr_test_open,
  72         .read    = seq_read,
  73         .llseek  = seq_lseek,
  74         .release = mic_intr_test_release
  75 };
  76
  77 /**
  78  * mic_create_card_debug_dir - Initialize MIC debugfs entries.
  79  */
  80 void __init mic_create_card_debug_dir(struct mic_driver *mdrv)
  81 {
  82         struct dentry *d;
  83
  84         if (!mic_dbg)
  85                 return;
  86
  87         mdrv->dbg_dir = debugfs_create_dir(mdrv->name, mic_dbg);
  88         if (!mdrv->dbg_dir) {
  89                 dev_err(mdrv->dev, "Cant create dbg_dir %s\n", mdrv->name);
  90                 return;
  91         }
  92
  93         d = debugfs_create_file("intr_test", 0444, mdrv->dbg_dir,
  94                 mdrv, &intr_test_ops);
  95
  96         if (!d) {
  97                 dev_err(mdrv->dev,
  98                         "Cant create dbg intr_test %s\n", mdrv->name);
  99                 return;
 100         }
 101 }
 102
 103 /**
 104  * mic_delete_card_debug_dir - Uninitialize MIC debugfs entries.
 105  */
 106 void mic_delete_card_debug_dir(struct mic_driver *mdrv)
 107 {
 108         if (!mdrv->dbg_dir)
 109                 return;
 110
 111         debugfs_remove_recursive(mdrv->dbg_dir);
 112 }
 113
 114 /**
 115  * mic_init_card_debugfs - Initialize global debugfs entry.
 116  */
 117 void __init mic_init_card_debugfs(void)
 118 {
 119         mic_dbg = debugfs_create_dir(KBUILD_MODNAME, NULL);
 120         if (!mic_dbg)
 121                 pr_err("can't create debugfs dir\n");
 122 }
 123
 124 /**
 125  * mic_exit_card_debugfs - Uninitialize global debugfs entry
 126  */
 127 void mic_exit_card_debugfs(void)
 128 {
 129         debugfs_remove(mic_dbg);
 130 }