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/*Copyright (c) 2019, The Linux Foundation. All rights reserved.
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only version 2 as published by the Free Software Foundation.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
/*!@file: DWC_ETH_QOS_poll_support.c
*/
#include "DWC_ETH_QOS_yheader.h"
#define AVB_CLASS_A_CHANNEL_NUM 2
#define AVB_CLASS_B_CHANNEL_NUM 3
extern struct DWC_ETH_QOS_prv_data *gDWC_ETH_QOS_prv_data;
struct pps_info {
int channel_no;
};
bool avb_class_a_msg_wq_flag;
bool avb_class_b_msg_wq_flag;
DECLARE_WAIT_QUEUE_HEAD(avb_class_a_msg_wq);
DECLARE_WAIT_QUEUE_HEAD(avb_class_b_msg_wq);
static ssize_t pps_fops_read(struct file *filp, char __user *buf,
size_t count, loff_t *f_pos)
{
unsigned int len = 0, buf_len = 5000;
char* temp_buf;
ssize_t ret_cnt = 0;
struct pps_info *info;
info = filp->private_data;
if (info->channel_no == AVB_CLASS_A_CHANNEL_NUM ) {
temp_buf = kzalloc(buf_len, GFP_KERNEL);
if (!temp_buf)
return -ENOMEM;
if (gDWC_ETH_QOS_prv_data)
len = scnprintf(temp_buf, buf_len ,
"%ld\n", gDWC_ETH_QOS_prv_data->avb_class_a_intr_cnt);
else
len = scnprintf(temp_buf, buf_len , "0\n");
ret_cnt = simple_read_from_buffer(buf, count, f_pos, temp_buf, len);
kfree(temp_buf);
if (gDWC_ETH_QOS_prv_data)
EMACERR("poll pps2intr info=%d sent by kernel\n", gDWC_ETH_QOS_prv_data->avb_class_a_intr_cnt);
} else if (info->channel_no == AVB_CLASS_B_CHANNEL_NUM ) {
temp_buf = kzalloc(buf_len, GFP_KERNEL);
if (!temp_buf)
return -ENOMEM;
if (gDWC_ETH_QOS_prv_data)
len = scnprintf(temp_buf, buf_len ,
"%ld\n", gDWC_ETH_QOS_prv_data->avb_class_b_intr_cnt);
else
len = scnprintf(temp_buf, buf_len , "0\n");
ret_cnt = simple_read_from_buffer(buf, count, f_pos, temp_buf, len);
kfree(temp_buf);
} else {
EMACERR("invalid channel %d\n",info->channel_no);
}
return ret_cnt;
}
static unsigned int pps_fops_poll(struct file *file, poll_table *wait)
{
unsigned int mask = 0;
struct pps_info *info;
info = file->private_data;
if (info->channel_no == AVB_CLASS_A_CHANNEL_NUM ){
EMACDBG("avb_class_a_fops_poll wait\n");
poll_wait(file, &avb_class_a_msg_wq, wait);
EMACDBG("avb_class_a_fops_poll exit\n");
if (avb_class_a_msg_wq_flag == 1) {
//Sending read mask
mask |= POLLIN | POLLRDNORM;
avb_class_a_msg_wq_flag = 0;
}
} else if (info->channel_no == AVB_CLASS_B_CHANNEL_NUM) {
EMACDBG("avb_class_b_fops_poll wait\n");
poll_wait(file, &avb_class_b_msg_wq, wait);
EMACDBG("avb_class_b_fops_poll exit\n");
if (avb_class_b_msg_wq_flag == 1) {
//Sending read mask
mask |= POLLIN | POLLRDNORM;
avb_class_b_msg_wq_flag = 0;
}
} else {
EMACERR("invalid channel %d\n",info->channel_no);
}
return mask;
}
int pps_open(struct inode *inode, struct file *file)
{
struct pps_info *info;
EMACDBG("pps_open enter\n");
info = kmalloc(sizeof(*info), GFP_KERNEL);
if (!info)
return -ENOMEM;
if (!strncmp(file->f_path.dentry->d_iname, AVB_CLASS_A_POLL_DEV_NODE_NAME , strlen (AVB_CLASS_A_POLL_DEV_NODE_NAME))) {
EMACDBG("pps_open file name =%s \n",file->f_path.dentry->d_iname);
info->channel_no = AVB_CLASS_A_CHANNEL_NUM;
} else if (!strncmp(file->f_path.dentry->d_iname, AVB_CLASS_B_POLL_DEV_NODE_NAME , strlen (AVB_CLASS_B_POLL_DEV_NODE_NAME))) {
EMACDBG("pps_open file name =%s \n",file->f_path.dentry->d_iname);
info->channel_no = AVB_CLASS_B_CHANNEL_NUM;
} else {
EMACDBG("stsrncmp failed for %s\n",file->f_path.dentry->d_iname);
}
file->private_data = info;
return 0;
}
int pps_release(struct inode *inode, struct file *file)
{
kfree(file->private_data);
return 0;
}
static const struct file_operations pps_fops = {
.owner = THIS_MODULE,
.open = pps_open,
.release = pps_release,
.read = pps_fops_read,
.poll = pps_fops_poll,
};
int create_pps_interrupt_info_device_node(dev_t *pps_dev_t, struct cdev** pps_cdev,
struct class** pps_class, char *pps_dev_node_name)
{
int ret;
EMACDBG("create_pps_interrupt_info_device_node enter \n");
ret = alloc_chrdev_region(pps_dev_t, 0, 1,
pps_dev_node_name);
if (ret) {
EMACERR("alloc_chrdev_region error for node %s \n", pps_dev_node_name);
goto alloc_chrdev1_region_fail;
}
*pps_cdev = cdev_alloc();
if(!*pps_cdev) {
ret = -ENOMEM;
EMACERR("failed to alloc cdev\n");
goto fail_alloc_cdev;
}
cdev_init(*pps_cdev, &pps_fops);
ret = cdev_add(*pps_cdev, *pps_dev_t, 1);
if (ret < 0) {
EMACERR(":cdev_add err=%d\n", -ret);
goto cdev1_add_fail;
}
*pps_class = class_create(THIS_MODULE, pps_dev_node_name);
if(!*pps_class) {
ret = -ENODEV;
EMACERR("failed to create class\n");
goto fail_create_class;
}
if (!device_create(*pps_class, NULL,
*pps_dev_t, NULL, pps_dev_node_name)) {
ret = -EINVAL;
EMACERR("failed to create device_create\n");
goto fail_create_device;
}
EMACDBG("create_pps_interrupt_info_device_node exit successfuly \n");
return 0;
fail_create_device:
class_destroy(*pps_class);
fail_create_class:
cdev_del(*pps_cdev);
cdev1_add_fail:
fail_alloc_cdev:
unregister_chrdev_region(*pps_dev_t, 1);
alloc_chrdev1_region_fail:
return ret;
}
int remove_pps_interrupt_info_device_node(struct DWC_ETH_QOS_prv_data *pdata)
{
cdev_del(pdata->avb_class_a_cdev);
device_destroy(pdata->avb_class_a_class, pdata->avb_class_a_dev_t);
class_destroy(pdata->avb_class_a_class);
unregister_chrdev_region(pdata->avb_class_a_dev_t, 1);
pdata->avb_class_a_cdev = NULL;
pdata->avb_class_a_class = NULL;
cdev_del(pdata->avb_class_b_cdev);
device_destroy(pdata->avb_class_b_class, pdata->avb_class_b_dev_t);
class_destroy(pdata->avb_class_b_class);
unregister_chrdev_region(pdata->avb_class_b_dev_t, 1);
pdata->avb_class_b_cdev = NULL;
pdata->avb_class_b_class = NULL;
return 0;
}
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