LXR linux/drivers/misc/mic/card/mic

   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 */
  37static struct dentry *mic_dbg;
  38
  39/**
  40 * mic_intr_test - Send interrupts to host.
  41 */
  42static 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
  59static 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
  64static int mic_intr_test_release(struct inode *inode, struct file *file)
  65{
  66        return single_release(inode, file);
  67}
  68
  69static 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 */
  80void __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 */
 106void 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 */
 117void __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 */
 127void mic_exit_card_debugfs(void)
 128{
 129        debugfs_remove(mic_dbg);
 130}
 131