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android_kernel_samsung_a7y1.../drivers/hid/hid-ovr.c
Waldemar Tomme 4e6e413da6 A750FNXXU5CUD3
2023-04-06 22:47:12 +02:00

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/*
* OVR driver for Linux. Based on hidraw
*/
/*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation; either version 2 of the License, or (at your option)
* any later version.
*/
#include <linux/cdev.h>
#include <linux/poll.h>
#include <linux/sched.h>
#include <linux/module.h>
#include <linux/usb.h>
#include <linux/hidraw.h>
#include <linux/netdevice.h>
#include <linux/interrupt.h>
#include "hid-ids.h"
struct rpscpus_data {
char netdev_name[16];
unsigned long netdev_name_len;
char rpscpus[4];
unsigned long rpscpus_len;
char default_rpscpus[4];
unsigned long default_rpscpus_len;
};
struct irq_affinity_data {
unsigned long irq_num;
char irq_affinity[4];
unsigned long irq_affinity_len;
char default_irq_affinity[4];
unsigned long default_irq_affinity_len;
};
#define OVRIOCGSERIALSIZE _IOR('S', 0x01, int)
#define OVRIOCGSERIAL(len) _IOC(_IOC_READ, 'S', 0x02, len)
#define OVRIOCSRPSCPUS _IOC(_IOC_WRITE|_IOC_READ, 'S', 0x03, sizeof(struct rpscpus_data))
#define OVRIOCSIRQAFFINITY _IOC(_IOC_WRITE|_IOC_READ, 'S', 0x04, sizeof(struct irq_affinity_data))
static struct rpscpus_data ovr_rpscpu_data;
static struct irq_affinity_data ovr_irq_affinity_data;
#define USB_TRACKER_INTERFACE_PROTOCOL 0
/* number of reports to buffer */
#define OVR_HIDRAW_BUFFER_SIZE 64
#define OVR_HIDRAW_MAX_DEVICES 64
#define OVR_FIRST_MINOR 0
#define OVR_HIDRAW_MAX_SERIAL 256
#define OVR_MODE_NODEVICE (0)
#define OVR_MODE_USB (1)
#define OVR_MODE_RELAY (2)
#define OVR_MODE_RELAY_FORCELY (3)
#define OVR_VERSION "0000"
#define OVR_MANUFACTURER "sec_hmt"
#define OVR_PRODUCT "Gear VR"
#define OVR_SERIAL "R323XXU0API1"
static char ovr_serial[OVR_HIDRAW_MAX_SERIAL] = {0,};
static char ovr_serial_len = 0;
static int ovr_mode = OVR_MODE_NODEVICE;
static u8 wbuf[OVR_HIDRAW_BUFFER_SIZE] = { 0,};
static u8 feature_report_69[69] = { 0x0, };
static u8 feature_report_64[64] = { \
0x0A, 0x00, 0xEA, 0x33, 0x32, 0x30, 0x57, 0x35, \
0x30, 0x34, 0x30, 0x48, 0x41, 0x44, 0x36, 0x0 , \
0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , \
0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , \
0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , \
0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , \
0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , \
0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0};
static u8 feature_report_56[56] = { 0x0, };
static u8 feature_report_18[18] = { 0x0, };
static u8 feature_report_15[15] = { \
0xA , 0x0 , 0x0 , 0x33, 0x32, 0x30, 0x57, 0x35, \
0x30, 0x34, 0x30, 0x48, 0x41, 0x44, 0x36};
static u8 feature_report_8[8] = { 0x0, };
static u8 feature_report_7[7] = { \
0x2, 0x0, 0x0, 0x2C, 0x1, 0xE8, 0x3};
static struct kobject *virtual_dir = NULL;
extern struct kobject *virtual_device_parent(struct device *dev);
static struct class *ovr_class;
static struct hidraw *ovr_hidraw_table[OVR_HIDRAW_MAX_DEVICES];
static DEFINE_MUTEX(minors_lock);
static DEFINE_SPINLOCK(list_lock);
static int ovr_major;
static struct cdev ovr_cdev;
#define MONITOR_MAX 32
static int opens = 0;
static unsigned long monitor_info[MONITOR_MAX][4] = {{0,},};
static unsigned int isr_count = 0;
static unsigned long last_isr = 0;
static unsigned int ovr_minor = 0;
static struct workqueue_struct *ovr_wq;
static void ovr_monitor_work(struct work_struct *work);
static DECLARE_DELAYED_WORK(ovr_work, ovr_monitor_work);
static void ovr_rpscpus_work_func(struct work_struct *work);
static DECLARE_DELAYED_WORK(ovr_rpscpus_work, ovr_rpscpus_work_func);
static void ovr_irq_affinity_work_func(struct work_struct *work);
static DECLARE_DELAYED_WORK(ovr_irq_affinity_work, ovr_irq_affinity_work_func);
extern int irq_select_affinity_usr(unsigned int irq, struct cpumask *mask);
static int ovr_report_event(struct hid_device *hid, u8 *data, int len);
static int ovr_connect(struct hid_device *hid, int mode);
static void ovr_disconnect(struct hid_device *hid);
static ssize_t ovr_hidraw_read(struct file *file, char __user *buffer, size_t count, loff_t *ppos)
{
struct hidraw_list *list = file->private_data;
int ret = 0, len;
DECLARE_WAITQUEUE(wait, current);
mutex_lock(&list->read_mutex);
while (ret == 0) {
if (list->head == list->tail) {
add_wait_queue(&list->hidraw->wait, &wait);
set_current_state(TASK_INTERRUPTIBLE);
while (list->head == list->tail) {
if (signal_pending(current)) {
ret = -ERESTARTSYS;
break;
}
if (!list->hidraw->exist) {
ret = -EIO;
break;
}
if (file->f_flags & O_NONBLOCK) {
ret = -EAGAIN;
break;
}
/* allow O_NONBLOCK to work well from other threads */
mutex_unlock(&list->read_mutex);
schedule();
mutex_lock(&list->read_mutex);
set_current_state(TASK_INTERRUPTIBLE);
}
set_current_state(TASK_RUNNING);
remove_wait_queue(&list->hidraw->wait, &wait);
}
if (ret)
goto out;
len = list->buffer[list->tail].len > count ?
count : list->buffer[list->tail].len;
if (list->buffer[list->tail].value) {
if (copy_to_user(buffer, list->buffer[list->tail].value, len)) {
ret = -EFAULT;
goto out;
}
ret = len;
if (opens > 0)
{
int i;
for (i=0; i<MONITOR_MAX; i++) {
if (monitor_info[i][0] == (unsigned long)file) {
monitor_info[i][1]++;
monitor_info[i][2] = jiffies;
break;
}
}
}
}
kfree(list->buffer[list->tail].value);
list->buffer[list->tail].value = NULL;
list->tail = (list->tail + 1) & (OVR_HIDRAW_BUFFER_SIZE - 1);
}
out:
mutex_unlock(&list->read_mutex);
return ret;
}
/* The first byte is expected to be a report number.
* This function is to be called with the minors_lock mutex held */
static ssize_t ovr_hidraw_send_report(struct file *file, const char __user *buffer, size_t count, unsigned char report_type)
{
unsigned int minor = iminor(file_inode(file));
struct hid_device *dev;
__u8 *buf;
int ret = 0;
if (!ovr_hidraw_table[minor] || !ovr_hidraw_table[minor]->exist) {
ret = -ENODEV;
goto out;
}
dev = ovr_hidraw_table[minor]->hid;
if (!dev) {
ret = -ENODEV;
goto out;
}
if (count > HID_MAX_BUFFER_SIZE) {
hid_warn(dev, "ovr - pid %d passed too large report\n",
task_pid_nr(current));
ret = -EINVAL;
goto out;
}
if (count < 2) {
hid_warn(dev, "ovr - pid %d passed too short report\n",
task_pid_nr(current));
ret = -EINVAL;
goto out;
}
buf = kmalloc(count * sizeof(__u8), GFP_KERNEL);
if (!buf) {
ret = -ENOMEM;
goto out;
}
if (copy_from_user(buf, buffer, count)) {
ret = -EFAULT;
goto out_free;
}
if ((report_type == HID_OUTPUT_REPORT) &&
!(dev->quirks & HID_QUIRK_NO_OUTPUT_REPORTS_ON_INTR_EP)) {
ret = hid_hw_output_report(dev, buf, count);
/*
* compatibility with old implementation of USB-HID and I2C-HID:
* if the device does not support receiving output reports,
* on an interrupt endpoint, fallback to SET_REPORT HID command.
*/
if (ret != -ENOSYS)
goto out_free;
}
ret = hid_hw_raw_request(dev, buf[0], buf, count, report_type,
HID_REQ_SET_REPORT);
out_free:
kfree(buf);
out:
return ret;
}
/* the first byte is expected to be a report number */
static ssize_t ovr_hidraw_write(struct file *file, const char __user *buffer, size_t count, loff_t *ppos)
{
ssize_t ret = -EFAULT;
mutex_lock(&minors_lock);
if ((ovr_mode == OVR_MODE_RELAY || ovr_mode == OVR_MODE_RELAY_FORCELY) \
&& count >= 24 && !copy_from_user(wbuf, buffer, count)) {
isr_count++;
last_isr = jiffies;
ovr_report_event(NULL, wbuf, OVR_HIDRAW_BUFFER_SIZE-2);
ret = count;
}
mutex_unlock(&minors_lock);
return ret;
}
static void ovr_monitor_work(struct work_struct *work)
{
int i;
unsigned long now = jiffies;
struct hid_device *dev;
int ret = 0;
__u8 *buf;
size_t count = 24;
unsigned char report_number = 0x31;
unsigned char report_type = HID_FEATURE_REPORT;
mutex_lock(&minors_lock);
if (opens > 0 && ovr_minor >= 0 && ovr_hidraw_table[ovr_minor] && ovr_hidraw_table[ovr_minor]->exist) {
dev = ovr_hidraw_table[ovr_minor]->hid;
if (dev) {
buf = kmalloc(count * sizeof(__u8), GFP_KERNEL);
if (buf) {
ret = hid_hw_raw_request(dev, report_number, buf, count, report_type, HID_REQ_GET_REPORT);
if (ret < 0) {
printk("OVR: hid_hw_raw_request error %d\n", ret);
} else {
printk("OVR: timestamp(0x%2.2X%2.2X%2.2X%2.2X) sensor(0x%2.2X%2.2X%2.2X%2.2X) pui(0x%2.2X%2.2X%2.2X%2.2X) proxy(%d) mainloop(0x%2.2X) (%2.2X %2.2X %2.2X %2.2X %2.2X %2.2X)\n",
buf[7], buf[6], buf[5], buf[4], buf[11], buf[10], buf[9], buf[8], buf[15], buf[14], buf[13], buf[12], buf[16], buf[17], buf[18], buf[19], buf[20], buf[21], buf[22], buf[23]);
}
kfree(buf);
} else {
printk("OVR: no mem for monitor report\n");
}
}
printk("OVR: isr(%d), diff(isr):%ums\n", isr_count, jiffies_to_msecs(now-last_isr));
isr_count = 0;
for (i=0; i<MONITOR_MAX; i++) {
if (monitor_info[i][0]) {
printk("OVR: 0x%x %lu(%lu), diff(read):%u secs\n", (unsigned int)monitor_info[i][0], monitor_info[i][3], monitor_info[i][1], jiffies_to_msecs(now-monitor_info[i][2])/1000);
monitor_info[i][1] = 0;
}
}
queue_delayed_work(ovr_wq, &ovr_work, msecs_to_jiffies(2000));
}
mutex_unlock(&minors_lock);
}
/* This function performs a Get_Report transfer over the control endpoint
* per section 7.2.1 of the HID specification, version 1.1. The first byte
* of buffer is the report number to request, or 0x0 if the defice does not
* use numbered reports. The report_type parameter can be HID_FEATURE_REPORT
* or HID_INPUT_REPORT. This function is to be called with the minors_lock
* mutex held. */
static ssize_t ovr_hidraw_get_report(struct file *file, char __user *buffer, size_t count, unsigned char report_type)
{
unsigned int minor = iminor(file_inode(file));
struct hid_device *dev;
__u8 *buf;
int ret = 0, len;
unsigned char report_number;
dev = ovr_hidraw_table[minor]->hid;
if (!dev) {
ret = -ENODEV;
goto out;
}
if (!dev->ll_driver->raw_request) {
ret = -ENODEV;
goto out;
}
if (count > HID_MAX_BUFFER_SIZE) {
printk(KERN_WARNING "ovr - hidraw: pid %d passed too large report\n",
task_pid_nr(current));
ret = -EINVAL;
goto out;
}
if (count < 2) {
printk(KERN_WARNING "ovr - hidraw: pid %d passed too short report\n",
task_pid_nr(current));
ret = -EINVAL;
goto out;
}
buf = kmalloc(count * sizeof(__u8), GFP_KERNEL);
if (!buf) {
ret = -ENOMEM;
goto out;
}
/*
* Read the first byte from the user. This is the report number,
* which is passed to ovr_hid_hw_raw_request().
*/
if (copy_from_user(&report_number, buffer, 1)) {
ret = -EFAULT;
goto out_free;
}
ret = hid_hw_raw_request(dev, report_number, buf, count, report_type,
HID_REQ_GET_REPORT);
if (ret < 0)
goto out_free;
len = (ret < count) ? ret : count;
if (copy_to_user(buffer, buf, len)) {
ret = -EFAULT;
goto out_free;
}
ret = len;
out_free:
kfree(buf);
out:
return ret;
}
static unsigned int ovr_hidraw_poll(struct file *file, poll_table *wait)
{
struct hidraw_list *list = file->private_data;
poll_wait(file, &list->hidraw->wait, wait);
if (list->head != list->tail)
return POLLIN | POLLRDNORM;
if (!list->hidraw->exist)
return POLLERR | POLLHUP;
return 0;
}
static int ovr_hidraw_open(struct inode *inode, struct file *file)
{
unsigned int minor = iminor(inode);
struct hidraw *dev;
struct hidraw_list *list;
int err = 0;
if (!(list = kzalloc(sizeof(struct hidraw_list), GFP_KERNEL))) {
err = -ENOMEM;
goto out;
}
mutex_lock(&minors_lock);
if (!ovr_hidraw_table[minor]) {
err = -ENODEV;
goto out_unlock;
}
printk("OVR: open %d (%d:%s) >>>\n", minor, current->pid, current->comm);
list->hidraw = ovr_hidraw_table[minor];
mutex_init(&list->read_mutex);
spin_lock_irq(&list_lock);
list_add_tail(&list->node, &ovr_hidraw_table[minor]->list);
spin_unlock_irq(&list_lock);
file->private_data = list;
dev = ovr_hidraw_table[minor];
dev->open++;
if (minor == ovr_minor) {
int i;
for (i=0; i<MONITOR_MAX; i++) {
if (monitor_info[i][0] == 0) {
monitor_info[i][0] = (unsigned long)file;
monitor_info[i][1] = 0;
monitor_info[i][2] = jiffies;
monitor_info[i][3] = current->pid;
break;
}
}
opens = dev->open;
if (opens == 1) {
queue_delayed_work(ovr_wq, &ovr_work, msecs_to_jiffies(2000));
}
}
printk("OVR: open(%d) err %d <<<\n", opens, err);
out_unlock:
mutex_unlock(&minors_lock);
out:
if (err < 0)
kfree(list);
return err;
}
static int ovr_hidraw_fasync(int fd, struct file *file, int on)
{
struct hidraw_list *list = file->private_data;
return fasync_helper(fd, file, on, &list->fasync);
}
static int ovr_hidraw_release(struct inode * inode, struct file * file)
{
unsigned int minor = iminor(inode);
struct hidraw *dev;
struct hidraw_list *list = file->private_data;
int ret;
int i;
unsigned long flags;
mutex_lock(&minors_lock);
if (!ovr_hidraw_table[minor]) {
ret = -ENODEV;
goto unlock;
}
printk("OVR: release %d (%d:%s) >>>\n", minor, current->pid, current->comm);
spin_lock_irqsave(&list_lock, flags);
list_del(&list->node);
spin_unlock_irqrestore(&list_lock, flags);
dev = ovr_hidraw_table[minor];
--dev->open;
if (minor == ovr_minor) {
for (i=0; i<MONITOR_MAX; i++) {
if (monitor_info[i][0] == (unsigned long)file) {
monitor_info[i][0] = 0;
break;
}
}
opens = dev->open;
}
if (!dev->open) {
if (!list->hidraw->exist) {
printk("OVR: freed ovr_hidraw_table %d\n", minor);
kfree(list->hidraw);
ovr_hidraw_table[minor] = NULL;
}
}
for (i = 0; i < OVR_HIDRAW_BUFFER_SIZE; ++i)
kfree(list->buffer[i].value);
kfree(list);
ret = 0;
printk("OVR: release(%d) <<<\n", opens);
unlock:
mutex_unlock(&minors_lock);
return ret;
}
static int ovr_report_event(struct hid_device *hid, u8 *data, int len)
{
struct hidraw *dev;
struct hidraw_list *list;
int ret = 0;
unsigned long flags;
if (hid) {
dev = hid->hidovr;
} else {
dev = ovr_hidraw_table[ovr_minor];
}
spin_lock_irqsave(&list_lock, flags);
list_for_each_entry(list, &dev->list, node) {
int new_head = (list->head + 1) & (OVR_HIDRAW_BUFFER_SIZE - 1);
if (new_head == list->tail)
continue;
if (!(list->buffer[list->head].value = kmemdup(data, len, GFP_ATOMIC))) {
ret = -ENOMEM;
spin_unlock_irqrestore(&list_lock, flags);
break;
}
list->buffer[list->head].len = len;
list->head = new_head;
kill_fasync(&list->fasync, SIGIO, POLL_IN);
}
spin_unlock_irqrestore(&list_lock, flags);
wake_up_interruptible(&dev->wait);
return ret;
}
static ssize_t get_rps_cpus(char *name, int name_size, char *buf)
{
size_t len = 0;
#ifdef CONFIG_RPS
struct net_device *dev;
struct netdev_rx_queue *queue = NULL;
struct rps_map *map;
cpumask_var_t mask;
int i;
if (name_size <= 0) {
return len;
}
dev = first_net_device(&init_net);
while (dev) {
if (!memcmp(name, dev->name, name_size)) {
queue = dev->_rx;
if (!queue) {
return -1;
}
if (!zalloc_cpumask_var(&mask, GFP_KERNEL))
return -ENOMEM;
rcu_read_lock();
map = rcu_dereference(queue->rps_map);
if (map)
for (i = 0; i < map->len; i++)
cpumask_set_cpu(map->cpus[i], mask);
len += cpumap_print_to_pagebuf(false, buf + len, mask);
if (PAGE_SIZE - len < 3) {
rcu_read_unlock();
free_cpumask_var(mask);
return -EINVAL;
}
rcu_read_unlock();
free_cpumask_var(mask);
break;
}
dev = next_net_device(dev);
}
#endif
return len;
}
static int set_rps_cpus(char *name, int name_size, char *buf, size_t len)
{
int ret = -1;
#ifdef CONFIG_RPS
struct net_device *dev;
struct netdev_rx_queue *queue = NULL;
struct rps_map *old_map, *map;
cpumask_var_t mask;
int err, cpu, i;
static DEFINE_SPINLOCK(rps_map_lock);
if (name_size <= 0 || len < 1 || len > 4) {
return ret;
}
dev = first_net_device(&init_net);
while (dev) {
if (!memcmp(name, dev->name, name_size)) {
queue = dev->_rx;
if (!queue) {
return -1;
}
if (len == 0 || (len == 1 && buf[0] == '0') || (len == 2 && buf[0] == '0' && buf[1] == '0')) {
map = rcu_dereference_protected(queue->rps_map, 1);
if (map) {
RCU_INIT_POINTER(queue->rps_map, NULL);
kfree_rcu(map, rcu);
}
return 0;
}
if (!alloc_cpumask_var(&mask, GFP_KERNEL)) {
return -ENOMEM;
}
err = bitmap_parse(buf, len, cpumask_bits(mask), nr_cpumask_bits);
if (err) {
free_cpumask_var(mask);
return err;
}
map = kzalloc(max_t(unsigned int,
RPS_MAP_SIZE(cpumask_weight(mask)), L1_CACHE_BYTES),
GFP_KERNEL);
if (!map) {
free_cpumask_var(mask);
return -ENOMEM;
}
i = 0;
for_each_cpu(cpu, mask)
map->cpus[i++] = cpu;
if (i)
map->len = i;
else {
kfree(map);
map = NULL;
free_cpumask_var(mask);
return -1;
}
spin_lock(&rps_map_lock);
old_map = rcu_dereference_protected(queue->rps_map,
lockdep_is_held(&rps_map_lock));
rcu_assign_pointer(queue->rps_map, map);
spin_unlock(&rps_map_lock);
if (map)
static_key_slow_inc(&rps_needed);
if (old_map) {
kfree_rcu(old_map, rcu);
static_key_slow_dec(&rps_needed);
}
free_cpumask_var(mask);
ret = map->len;
break;
}
dev = next_net_device(dev);
}
#endif
return ret;
}
static int write_irq_affinity(unsigned int irq, const char __user *buffer, size_t count)
{
int err = -1;
#ifdef CONFIG_SMP
cpumask_var_t new_value;
if (count < 1 || count > 4) {
return err;
}
if (!irq_can_set_affinity(irq))
return -EIO;
if (!alloc_cpumask_var(&new_value, GFP_KERNEL))
return -ENOMEM;
err = cpumask_parse_user(buffer, count, new_value);
if (err)
goto free_cpumask;
if (!cpumask_intersects(new_value, cpu_online_mask)) {
err = irq_select_affinity_usr(irq, new_value) ? -EINVAL : count;
} else {
irq_set_affinity(irq, new_value);
err = count;
}
free_cpumask:
free_cpumask_var(new_value);
#endif
return err;
}
void init_ovr_data(void) {
ovr_rpscpu_data.netdev_name[0] = 'w';
ovr_rpscpu_data.netdev_name[1] = 'l';
ovr_rpscpu_data.netdev_name[2] = 'a';
ovr_rpscpu_data.netdev_name[3] = 'n';
ovr_rpscpu_data.netdev_name[4] = '0';
ovr_rpscpu_data.netdev_name_len = 5;
ovr_rpscpu_data.rpscpus_len = 0;
ovr_rpscpu_data.default_rpscpus_len = 0;
ovr_irq_affinity_data.irq_num = 0;
ovr_irq_affinity_data.irq_affinity_len = 0;
ovr_irq_affinity_data.default_irq_affinity_len = 0;
#if defined(CONFIG_SOC_EXYNOS7420) || defined(CONFIG_SOC_EXYNOS8890)
ovr_rpscpu_data.rpscpus[0] = 'f';
ovr_rpscpu_data.rpscpus[1] = '0';
ovr_rpscpu_data.rpscpus_len = 2;
#elif defined(CONFIG_ARCH_APQ8084)
ovr_rpscpu_data.rpscpus[0] = 'c';
ovr_rpscpu_data.rpscpus_len = 1;
ovr_irq_affinity_data.irq_num = 276;
ovr_irq_affinity_data.irq_affinity[0] = '2';
ovr_irq_affinity_data.irq_affinity_len = 1;
ovr_irq_affinity_data.default_irq_affinity[0] = 'f';
ovr_irq_affinity_data.default_irq_affinity_len = 1;
#elif defined(CONFIG_ARCH_MSM8996)
ovr_rpscpu_data.rpscpus[0] = 'e';
ovr_rpscpu_data.rpscpus_len = 1;
#endif
}
void set_rpscpus(int bSet) {
if (bSet) {
if (ovr_rpscpu_data.rpscpus_len > 0) {
if (ovr_rpscpu_data.rpscpus_len < 16) {
ovr_rpscpu_data.netdev_name[ovr_rpscpu_data.netdev_name_len] = 0;
printk("OVR: rpscpus i/f : %s\n", ovr_rpscpu_data.netdev_name);
}
ovr_rpscpu_data.default_rpscpus_len =
get_rps_cpus(ovr_rpscpu_data.netdev_name,
ovr_rpscpu_data.netdev_name_len,
ovr_rpscpu_data.default_rpscpus);
set_rps_cpus(ovr_rpscpu_data.netdev_name,
ovr_rpscpu_data.netdev_name_len,
ovr_rpscpu_data.rpscpus,
ovr_rpscpu_data.rpscpus_len);
}
} else {
if (ovr_rpscpu_data.default_rpscpus_len > 0) {
set_rps_cpus(ovr_rpscpu_data.netdev_name,
ovr_rpscpu_data.netdev_name_len,
ovr_rpscpu_data.default_rpscpus,
ovr_rpscpu_data.default_rpscpus_len);
}
}
}
void set_irq_affinity(int bSet) {
if (bSet) {
if (ovr_irq_affinity_data.irq_affinity_len > 0) {
printk("OVR: affinity irq : %d\n", (int)ovr_irq_affinity_data.irq_num);
write_irq_affinity(ovr_irq_affinity_data.irq_num,
ovr_irq_affinity_data.irq_affinity,
ovr_irq_affinity_data.irq_affinity_len);
}
} else {
if (ovr_irq_affinity_data.default_irq_affinity_len > 0) {
write_irq_affinity(ovr_irq_affinity_data.irq_num,
ovr_irq_affinity_data.default_irq_affinity,
ovr_irq_affinity_data.default_irq_affinity_len);
}
}
}
static void ovr_rpscpus_work_func(struct work_struct *work)
{
set_rpscpus(1);
}
static void ovr_irq_affinity_work_func(struct work_struct *work)
{
set_irq_affinity(1);
}
static ssize_t bcdDevice_show(struct device *dev, struct device_attribute *attr, char *buf)
{
return sprintf(buf, "%s\n", OVR_VERSION);
}
static ssize_t serial_show(struct device *dev, struct device_attribute *attr, char *buf)
{
return sprintf(buf, "%s\n", OVR_SERIAL);
}
static ssize_t product_show(struct device *dev, struct device_attribute *attr, char *buf)
{
return sprintf(buf, "%s\n", OVR_PRODUCT);
}
static ssize_t manufacturer_show(struct device *dev, struct device_attribute *attr, char *buf)
{
return sprintf(buf, "%s\n", OVR_MANUFACTURER);
}
static DEVICE_ATTR(bcdDevice, S_IRUGO, bcdDevice_show, NULL);
static DEVICE_ATTR(serial, S_IRUGO, serial_show, NULL);
static DEVICE_ATTR(product, S_IRUGO, product_show, NULL);
static DEVICE_ATTR(manufacturer, S_IRUGO, manufacturer_show, NULL);
static struct device_attribute *ovr_dev_attrs[] = {
&dev_attr_bcdDevice,
&dev_attr_serial,
&dev_attr_manufacturer,
&dev_attr_product,
NULL,
};
static ssize_t relay_on_show(struct device *dev, struct device_attribute *attr, char *buf)
{
return sprintf(buf, "%d\n", ovr_mode);
}
static ssize_t relay_on_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
{
unsigned long val;
if (kstrtoul(buf, 0, &val))
return -EINVAL;
switch(val) {
case OVR_MODE_RELAY:
ovr_connect(NULL, OVR_MODE_RELAY);
break;
case OVR_MODE_RELAY_FORCELY:
ovr_connect(NULL, OVR_MODE_RELAY_FORCELY);
break;
case OVR_MODE_NODEVICE:
ovr_disconnect(NULL);
break;
default:
return -EINVAL;
break;
}
return count;
}
static DEVICE_ATTR(relay_on, 0664, relay_on_show, relay_on_store);
static struct device_attribute *ovr_relay_attrs[] = {
&dev_attr_relay_on,
NULL,
};
static void make_ovr_node(void)
{
int ret, i;
if (virtual_dir) {
for (i=0; ovr_dev_attrs[i]!= NULL; i++) {
ret = sysfs_create_file(virtual_dir, &ovr_dev_attrs[i]->attr);
if (ret) {
printk("OVR: sysfs_create_file error %d(%d) \n", ret, i);
}
}
}
}
static void remove_ovr_node(void)
{
int i;
if (virtual_dir) {
for (i=0; ovr_dev_attrs[i]!= NULL; i++) {
sysfs_remove_file(virtual_dir, &ovr_dev_attrs[i]->attr);
}
}
}
static int ovr_connect(struct hid_device *hid, int mode)
{
int minor, result, i;
struct hidraw *dev;
/* we accept any HID device, no matter the applications */
if (ovr_mode == OVR_MODE_RELAY && hid) {
ovr_disconnect(NULL);
}
else if (ovr_mode) {
return -EINVAL;
}
dev = kzalloc(sizeof(struct hidraw), GFP_KERNEL);
if (!dev)
return -ENOMEM;
result = -EINVAL;
mutex_lock(&minors_lock);
for (minor = 0; minor < OVR_HIDRAW_MAX_DEVICES; minor++)
{
if (ovr_hidraw_table[minor]) {
printk("OVR: old ovr_hidraw_table %d\n", minor);
continue;
}
ovr_hidraw_table[minor] = dev;
result = 0;
break;
}
printk("OVR: connect %d %d (%d:%s) >>>\n", minor, result, current->pid, current->comm);
if (result) {
mutex_unlock(&minors_lock);
kfree(dev);
goto out;
}
if (hid) {
dev->dev = device_create(ovr_class, &hid->dev, MKDEV(ovr_major, minor),
NULL, "%s%d", "ovr", minor);
} else {
dev->dev = device_create(ovr_class, NULL, MKDEV(ovr_major, minor),
NULL, "%s%d", "ovr", minor);
}
if (IS_ERR(dev->dev)) {
ovr_hidraw_table[minor] = NULL;
mutex_unlock(&minors_lock);
result = PTR_ERR(dev->dev);
kfree(dev);
goto out;
}
if (!hid) {
make_ovr_node();
if (mode == OVR_MODE_RELAY_FORCELY) {
ovr_mode = OVR_MODE_RELAY_FORCELY;
} else {
ovr_mode = OVR_MODE_RELAY;
}
} else {
ovr_mode = OVR_MODE_USB;
}
for (i=0; i<MONITOR_MAX; i++)
monitor_info[i][0] = 0;
opens = 0;
ovr_minor = minor;
printk("OVR: connect <<<\n");
mutex_unlock(&minors_lock);
init_waitqueue_head(&dev->wait);
INIT_LIST_HEAD(&dev->list);
if (hid) {
dev->hid = hid;
}
dev->minor = minor;
dev->exist = 1;
if (hid) {
hid->hidovr = dev;
}
init_ovr_data();
set_rpscpus(1);
set_irq_affinity(1);
out:
return result;
}
static void ovr_disconnect(struct hid_device *hid)
{
struct hidraw *hidraw;
if (ovr_mode == OVR_MODE_NODEVICE || (ovr_mode == OVR_MODE_USB && !hid)) {
return;
}
if (hid) {
hidraw = hid->hidovr;
} else {
hidraw = ovr_hidraw_table[ovr_minor];
}
mutex_lock(&minors_lock);
printk("OVR: disconnect %d %d (%d:%s) >>>\n", hidraw->minor, hidraw->open, current->pid, current->comm);
if (!hid) {
remove_ovr_node();
}
if (hidraw->minor == ovr_minor) {
opens = 0;
ovr_minor = -1;
}
hidraw->exist = 0;
device_destroy(ovr_class, MKDEV(ovr_major, hidraw->minor));
if (hidraw->open) {
wake_up_interruptible(&hidraw->wait);
} else {
printk("OVR: freed ovr_hidraw_table %d\n", hidraw->minor);
ovr_hidraw_table[hidraw->minor] = NULL;
kfree(hidraw);
}
printk("OVR: disconnect <<<\n");
ovr_mode = OVR_MODE_NODEVICE;
mutex_unlock(&minors_lock);
set_rpscpus(0);
set_irq_affinity(0);
}
static long ovr_hidraw_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
struct inode *inode = file->f_path.dentry->d_inode;
unsigned int minor = iminor(inode);
long ret = 0;
struct hidraw *dev;
void __user *user_arg = (void __user*) arg;
mutex_lock(&minors_lock);
dev = ovr_hidraw_table[minor];
if (!dev || (dev && !dev->exist)) {
ret = -ENODEV;
goto out;
}
switch (cmd) {
case HIDIOCGRDESCSIZE:
if (dev->hid) {
if (put_user(dev->hid->rsize, (int __user *)arg))
ret = -EFAULT;
} else {
ret = -EFAULT;
}
break;
case HIDIOCGRDESC:
{
if (dev->hid) {
__u32 len;
if (get_user(len, (int __user *)arg))
ret = -EFAULT;
else if (len > HID_MAX_DESCRIPTOR_SIZE - 1)
ret = -EINVAL;
else if (copy_to_user(user_arg + offsetof(
struct hidraw_report_descriptor,
value[0]),
dev->hid->rdesc,
min(dev->hid->rsize, len)))
ret = -EFAULT;
} else {
ret = -EFAULT;
}
break;
}
case HIDIOCGRAWINFO:
{
struct hidraw_devinfo dinfo;
if (dev->hid) {
dinfo.bustype = dev->hid->bus;
dinfo.vendor = dev->hid->vendor;
dinfo.product = dev->hid->product;
} else {
dinfo.bustype = 0;
dinfo.vendor = USB_VENDOR_ID_SAMSUNG_ELECTRONICS;
dinfo.product = USB_DEVICE_ID_SAMSUNG_GEARVR_1;
}
if (copy_to_user(user_arg, &dinfo, sizeof(dinfo)))
ret = -EFAULT;
break;
}
default:
{
struct hid_device *hid = dev->hid;
if (_IOC_TYPE(cmd) != 'H') {
if (_IOC_TYPE(cmd) == 'S') {
if (cmd == OVRIOCGSERIALSIZE) {
if (ovr_serial_len <= 0)
ret = 0;
else if (put_user(ovr_serial_len, (int __user *)arg))
ret = -EFAULT;
break;
} else if (_IOC_NR(cmd) == _IOC_NR(OVRIOCGSERIAL(0))) {
__u32 len;
if (ovr_serial_len <= 0)
ret = -EFAULT;
else if (get_user(len, (int __user *)arg))
ret = -EFAULT;
else if (len != ovr_serial_len)
ret = -EINVAL;
else if (copy_to_user(user_arg, ovr_serial, ovr_serial_len))
ret = -EFAULT;
break;
} else if (cmd == OVRIOCSRPSCPUS) {
ret = copy_from_user(&ovr_rpscpu_data, user_arg, sizeof(struct rpscpus_data));
if (!ret &&
ovr_rpscpu_data.netdev_name_len > 0 && ovr_rpscpu_data.netdev_name_len <= 16 &&
ovr_rpscpu_data.rpscpus_len > 0 && ovr_rpscpu_data.rpscpus_len <= 4) {
queue_delayed_work(ovr_wq, &ovr_rpscpus_work, 0);
}
break;
} else if (cmd == OVRIOCSIRQAFFINITY) {
ret = copy_from_user(&ovr_irq_affinity_data, user_arg, sizeof(struct irq_affinity_data));
if (!ret && ovr_irq_affinity_data.irq_num > 0 &&
ovr_irq_affinity_data.irq_affinity_len > 0 &&
ovr_irq_affinity_data.irq_affinity_len <= 4 &&
ovr_irq_affinity_data.default_irq_affinity_len > 0 &&
ovr_irq_affinity_data.default_irq_affinity_len <= 4) {
queue_delayed_work(ovr_wq, &ovr_irq_affinity_work, 0);
}
break;
}
}
ret = -EINVAL;
break;
}
if (_IOC_NR(cmd) == _IOC_NR(HIDIOCSFEATURE(0))) {
int len = _IOC_SIZE(cmd);
if (hid) {
ret = ovr_hidraw_send_report(file, user_arg, len, HID_FEATURE_REPORT);
} else {
switch (len) {
case 2:
ret = len;
feature_report_7[3] = 0x2C;
break;
case 7:
ret = copy_from_user((void *)feature_report_7, user_arg, len) ? -EFAULT : len;
break;
default:
ret = len;
break;
}
}
break;
}
if (_IOC_NR(cmd) == _IOC_NR(HIDIOCGFEATURE(0))) {
int len = _IOC_SIZE(cmd);
if (hid) {
ret = ovr_hidraw_get_report(file, user_arg, len, HID_FEATURE_REPORT);
} else {
__u8 *buf;
switch (len) {
case 7:
buf = feature_report_7;
break;
case 8:
buf = feature_report_8;
break;
case 15:
buf = feature_report_15;
break;
case 18:
buf = feature_report_18;
break;
case 56:
buf = feature_report_56;
break;
case 64:
buf = feature_report_64;
break;
case 69:
buf = feature_report_69;
break;
default:
if (len <= 69) {
buf = feature_report_69;
} else {
ret = -EINVAL;
goto out;
}
break;
}
ret = copy_to_user(user_arg, (void *)buf, len) ? -EFAULT : len;
}
break;
}
/* Begin Read-only ioctls. */
if (_IOC_DIR(cmd) != _IOC_READ) {
ret = -EINVAL;
break;
}
if (_IOC_NR(cmd) == _IOC_NR(HIDIOCGRAWNAME(0))) {
if (hid) {
int len = strlen(hid->name) + 1;
if (len > _IOC_SIZE(cmd))
len = _IOC_SIZE(cmd);
ret = copy_to_user(user_arg, hid->name, len) ?
-EFAULT : len;
} else {
ret = -EFAULT;
}
break;
}
if (_IOC_NR(cmd) == _IOC_NR(HIDIOCGRAWPHYS(0))) {
if (hid) {
int len = strlen(hid->phys) + 1;
if (len > _IOC_SIZE(cmd))
len = _IOC_SIZE(cmd);
ret = copy_to_user(user_arg, hid->phys, len) ?
-EFAULT : len;
} else {
ret = -EFAULT;
}
break;
}
}
ret = -ENOTTY;
}
out:
mutex_unlock(&minors_lock);
return ret;
}
static const struct file_operations ovr_ops = {
.owner = THIS_MODULE,
.read = ovr_hidraw_read,
.write = ovr_hidraw_write,
.poll = ovr_hidraw_poll,
.open = ovr_hidraw_open,
.release = ovr_hidraw_release,
.unlocked_ioctl = ovr_hidraw_ioctl,
#ifdef CONFIG_COMPAT
.compat_ioctl = ovr_hidraw_ioctl,
#endif
.fasync = ovr_hidraw_fasync,
.llseek = noop_llseek,
};
static int ovr_probe(struct hid_device *hdev, const struct hid_device_id *id)
{
int retval;
struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
retval = hid_parse(hdev);
if (retval) {
hid_err(hdev, "ovr - parse failed\n");
goto exit;
}
retval = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
if (retval) {
hid_err(hdev, "ovr - hw start failed\n");
goto exit;
}
if (!intf || intf->cur_altsetting->desc.bInterfaceProtocol
!= USB_TRACKER_INTERFACE_PROTOCOL) {
return 0;
}
if (intf) {
struct usb_device *udev = interface_to_usbdev(intf);
if (udev) {
ovr_serial_len = strnlen(udev->serial, OVR_HIDRAW_MAX_SERIAL);
if (ovr_serial_len > 0) {
strncpy(ovr_serial, udev->serial, ovr_serial_len);
printk("OVR: %s(%d)\n", udev->serial, ovr_serial_len);
}
}
}
retval = ovr_connect(hdev, OVR_MODE_USB);
if (retval) {
hid_err(hdev, "ovr - Couldn't connect\n");
goto exit_stop;
}
retval = hid_hw_power(hdev, PM_HINT_FULLON);
if (retval < 0) {
hid_err(hdev, "ovr - Couldn't feed power\n");
ovr_disconnect(hdev);
goto exit_stop;
}
retval = hid_hw_open(hdev);
if (retval < 0) {
hid_err(hdev, "ovr - Couldn't open hid\n");
hid_hw_power(hdev, PM_HINT_NORMAL);
ovr_disconnect(hdev);
goto exit_stop;
}
return 0;
exit_stop:
hid_hw_stop(hdev);
exit:
return retval;
}
static void ovr_remove(struct hid_device *hdev)
{
struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
if (intf->cur_altsetting->desc.bInterfaceProtocol
!= USB_TRACKER_INTERFACE_PROTOCOL) {
hid_hw_stop(hdev);
return;
}
hid_hw_close(hdev);
hid_hw_power(hdev, PM_HINT_NORMAL);
ovr_disconnect(hdev);
hid_hw_stop(hdev);
}
static int ovr_raw_event(struct hid_device *hdev, struct hid_report *report, u8 *data, int size)
{
int retval = 0;
struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
if (intf->cur_altsetting->desc.bInterfaceProtocol
!= USB_TRACKER_INTERFACE_PROTOCOL) {
return 0;
}
isr_count++;
last_isr = jiffies;
if (hdev->hidovr) {
retval = ovr_report_event(hdev, data, size);
if (retval < 0)
printk("OVR: raw event err %d\n", retval);
}
return retval;
}
static const struct hid_device_id ovr_devices[] = {
{ HID_USB_DEVICE(USB_VENDOR_ID_OVR, USB_DEVICE_ID_OVR_TRACKER) },
{ HID_USB_DEVICE(USB_VENDOR_ID_OVR, USB_DEVICE_ID_OVR_KTRACKER) },
{ HID_USB_DEVICE(USB_VENDOR_ID_OVR, USB_DEVICE_ID_OVR_LATENCY_TESTER) },
{ HID_USB_DEVICE(USB_VENDOR_ID_SAMSUNG_ELECTRONICS, USB_DEVICE_ID_SAMSUNG_GEARVR_1) },
{ HID_USB_DEVICE(USB_VENDOR_ID_SAMSUNG_ELECTRONICS, USB_DEVICE_ID_SAMSUNG_GEARVR_2) },
{ HID_USB_DEVICE(USB_VENDOR_ID_SAMSUNG_ELECTRONICS, USB_DEVICE_ID_SAMSUNG_GEARVR_3) },
{ HID_USB_DEVICE(USB_VENDOR_ID_SAMSUNG_ELECTRONICS, USB_DEVICE_ID_SAMSUNG_GEARVR_4) },
{ HID_USB_DEVICE(USB_VENDOR_ID_SAMSUNG_ELECTRONICS, USB_DEVICE_ID_SAMSUNG_GEARVR_5) },
{ HID_USB_DEVICE(USB_VENDOR_ID_SAMSUNG_ELECTRONICS, USB_DEVICE_ID_SAMSUNG_GEARVR_6) },
{ }
};
MODULE_DEVICE_TABLE(hid, ovr_devices);
static struct hid_driver ovr_driver = {
.name = "ovr",
.id_table = ovr_devices,
.probe = ovr_probe,
.remove = ovr_remove,
.raw_event = ovr_raw_event
};
static int __init ovr_init(void)
{
int retval = 0;
dev_t dev_id;
ovr_class = class_create(THIS_MODULE, "ovr");
if (IS_ERR(ovr_class)) {
return PTR_ERR(ovr_class);
}
virtual_dir = virtual_device_parent(NULL);
if (!virtual_dir) {
pr_warn("ovr_init - failed virtual_device_parent\n");
goto out_class;
}
retval = sysfs_create_file(virtual_dir, &ovr_relay_attrs[0]->attr);
if (retval) {
pr_warn("ovr_init - failed sysfs_create_file\n");
kobject_put(virtual_dir);
virtual_dir = NULL;
goto out_class;
}
retval = hid_register_driver(&ovr_driver);
if (retval < 0) {
pr_warn("ovr_init - Can't register drive.\n");
goto out_class;
}
retval = alloc_chrdev_region(&dev_id, OVR_FIRST_MINOR,
OVR_HIDRAW_MAX_DEVICES, "ovr");
if (retval < 0) {
pr_warn("ovr_init - Can't allocate chrdev region.\n");
goto out_register;
}
ovr_major = MAJOR(dev_id);
cdev_init(&ovr_cdev, &ovr_ops);
cdev_add(&ovr_cdev, dev_id, OVR_HIDRAW_MAX_DEVICES);
ovr_wq = create_workqueue("ovr_work");
return 0;
out_register:
hid_unregister_driver(&ovr_driver);
out_class:
class_destroy(ovr_class);
return retval;
}
static void __exit ovr_exit(void)
{
dev_t dev_id = MKDEV(ovr_major, 0);
cdev_del(&ovr_cdev);
unregister_chrdev_region(dev_id, OVR_HIDRAW_MAX_DEVICES);
hid_unregister_driver(&ovr_driver);
kobject_put(virtual_dir);
virtual_dir = NULL;
class_destroy(ovr_class);
}
module_init(ovr_init);
module_exit(ovr_exit);
MODULE_DESCRIPTION("USB OVR device driver.");
MODULE_LICENSE("GPL v2");
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