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/*
* Copyright (c) 2011, Code Aurora Forum. 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.
*/
#include <linux/slab.h>
#include <linux/kernel.h>
#include <linux/device.h>
#include <linux/platform_device.h>
#include <linux/debugfs.h>
#include <linux/crc-ccitt.h>
#include <mach/diag_bridge.h>
#define DRIVER_DESC "USB host diag bridge driver test"
#define DRIVER_VERSION "1.0"
#define RD_BUF_SIZE 2048
#define DIAG_TEST_CONNECTED 0
struct diag_test_dev {
char *read_buf;
struct work_struct read_w;
unsigned long flags;
struct diag_bridge_ops ops;
};
static struct diag_test_dev *__dev;
static struct dentry *dent;
static void
diag_test_read_complete_cb(void *d, char *buf, size_t size, size_t actual)
{
if (actual < 0) {
pr_err("%s: read complete err\n", __func__);
return;
}
print_hex_dump(KERN_INFO, "to_host:", 0, 1, 1, buf, actual, false);
}
static void diag_test_read_work(struct work_struct *w)
{
struct diag_test_dev *dev =
container_of(w, struct diag_test_dev, read_w);
memset(dev->read_buf, 0, RD_BUF_SIZE);
diag_bridge_read(dev->read_buf, RD_BUF_SIZE);
}
static void
diag_test_write_complete_cb(void *d, char *buf, size_t size, size_t actual)
{
struct diag_test_dev *dev = d;
if (actual > 0)
schedule_work(&dev->read_w);
}
#if defined(CONFIG_DEBUG_FS)
#define DEBUG_BUF_SIZE 1024
static ssize_t send_ping_cmd(struct file *file, const char __user *ubuf,
size_t count, loff_t *ppos)
{
struct diag_test_dev *dev = __dev;
unsigned char *buf;
int temp = sizeof(unsigned char) * 4;
if (!dev)
return -ENODEV;
buf = kmalloc(temp, GFP_KERNEL);
if (!buf) {
pr_err("%s: unable to allocate mem for ping cmd\n",
__func__);
return -ENOMEM;
}
/* hdlc encoded ping command */
buf[0] = 0x0C;
buf[1] = 0x14;
buf[2] = 0x3A;
buf[3] = 0x7E;
diag_bridge_write(buf, temp);
return count;
}
const struct file_operations diag_test_ping_ops = {
.write = send_ping_cmd,
};
static void diag_test_debug_init(void)
{
struct dentry *dfile;
dent = debugfs_create_dir("diag_test", 0);
if (IS_ERR(dent))
return;
dfile = debugfs_create_file("send_ping", 0444, dent,
0, &diag_test_ping_ops);
if (!dfile || IS_ERR(dfile))
debugfs_remove(dent);
}
#else
static void diag_test_debug_init(void) { }
#endif
static int diag_test_remove(struct platform_device *pdev)
{
diag_bridge_close();
if (dent) {
debugfs_remove_recursive(dent);
dent = NULL;
}
return 0;
}
static int diag_test_probe(struct platform_device *pdev)
{
struct diag_test_dev *dev = __dev;
int ret = 0;
pr_info("%s:\n", __func__);
ret = diag_bridge_open(&dev->ops);
if (ret)
pr_err("diag open failed: %d", ret);
diag_test_debug_init();
return ret;
}
static struct platform_driver diag_test = {
.remove = diag_test_remove,
.probe = diag_test_probe,
.driver = {
.name = "diag_bridge",
.owner = THIS_MODULE,
},
};
static int __init diag_test_init(void)
{
struct diag_test_dev *dev;
int ret = 0;
pr_info("%s\n", __func__);
dev = kzalloc(sizeof(*dev), GFP_KERNEL);
if (!dev)
return -ENOMEM;
__dev = dev;
dev->ops.read_complete_cb = diag_test_read_complete_cb;
dev->ops.write_complete_cb = diag_test_write_complete_cb;
dev->read_buf = kmalloc(RD_BUF_SIZE, GFP_KERNEL);
if (!dev->read_buf) {
pr_err("%s: unable to allocate read buffer\n", __func__);
kfree(dev);
return -ENOMEM;
}
dev->ops.ctxt = dev;
INIT_WORK(&dev->read_w, diag_test_read_work);
ret = platform_driver_register(&diag_test);
if (ret)
pr_err("%s: platform driver %s register failed %d\n",
__func__, diag_test.driver.name, ret);
return ret;
}
static void __exit diag_test_exit(void)
{
struct diag_test_dev *dev = __dev;
pr_info("%s:\n", __func__);
if (test_bit(DIAG_TEST_CONNECTED, &dev->flags))
diag_bridge_close();
kfree(dev->read_buf);
kfree(dev);
}
module_init(diag_test_init);
module_exit(diag_test_exit);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_VERSION(DRIVER_VERSION);
MODULE_LICENSE("GPL v2");
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