--- /dev/null
+/*
+ * Rockchip VR driver for Linux
+ *
+ * Copyright (C) ROCKCHIP, Inc.
+ *
+ * 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.
+ */
+
+/*
+ * Driver for Rockchip VR devices. Based on hidraw driver.
+ */
+
+#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/input.h>
+#include <linux/platform_device.h>
+#include "hid-rkvr.h"
+#include "hid-ids.h"
+
+#define USB_TRACKER_INTERFACE_PROTOCOL 0
+/* define rkvr interface number */
+#define RKVR_INTERFACE_USB_AUDIO_ID 1
+#define RKVR_INTERFACE_USB_SENSOR_ID 2
+#define RKVR_INTERFACE_USB_AUDIO_KEY_ID 1
+/* number of reports to buffer */
+#define RKVR_HIDRAW_BUFFER_SIZE 64
+#define RKVR_HIDRAW_MAX_DEVICES 8
+#define RKVR_FIRST_MINOR 0
+
+static struct class *rkvr_class;
+
+static struct hidraw *rkvr_hidraw_table[RKVR_HIDRAW_MAX_DEVICES];
+
+static DEFINE_MUTEX(minors_lock);
+
+struct keymap_t {
+ __u16 key_menu_up:1;
+ __u16 key_menu_down:1;
+ __u16 key_home_up:1;
+ __u16 key_home_down:1;
+ __u16 key_power_up:1;
+ __u16 key_power_down:1;
+ __u16 key_volup_up:1;
+ __u16 key_volup_down:1;
+ __u16 key_voldn_up:1;
+ __u16 key_voldn_down:1;
+ __u16 key_pressed:1;
+};
+
+union rkvr_data_t {
+ struct rkvr_data {
+ __u8 buf_head[6];
+ __u8 buf_sensortemperature[2];
+ __u8 buf_sensor[40];
+ __u8 buf_reserve[12];
+ struct keymap_t key_map;
+ } rkvr_data;
+ __u8 buf[62];
+};
+
+static int rkvr_major;
+static struct cdev rkvr_cdev;
+static unsigned int count_array[15] = {0,};
+static unsigned long old_jiffy_array[15] = {0,};
+static int rkvr_index;
+static int opens;
+
+struct sensor_hid_data {
+ void *priv;
+ int (*send_event)(char *raw_data, size_t raw_len, void *priv);
+} sensorData;
+
+static DEFINE_MUTEX(device_list_lock);
+static struct list_head rkvr_hid_hw_device_list = {
+ .next = &rkvr_hid_hw_device_list,
+ .prev = &rkvr_hid_hw_device_list
+};
+
+static struct rkvr_iio_hw_device *inv_hid_alloc(const char *name)
+{
+ struct rkvr_iio_hw_device *p;
+ const char *s;
+
+ if (!name)
+ return 0;
+ s = kstrdup_const(name, GFP_KERNEL);
+ if (!s)
+ goto error;
+ p = kzalloc(sizeof(*p), GFP_KERNEL);
+ if (!p)
+ goto error;
+ p->name = s;
+ return p;
+error:
+ pr_err("%s error!\n", __func__);
+ if (s)
+ kfree_const(s);
+ return 0;
+}
+
+static void inv_hid_free(struct rkvr_iio_hw_device *hw_device)
+{
+ kfree_const(hw_device->name);
+ kfree(hw_device);
+}
+
+static int inv_hid_register_devcie(struct rkvr_iio_hw_device *hw_device)
+{
+
+ mutex_lock(&device_list_lock);
+ if (hw_device->name && (!list_empty(&rkvr_hid_hw_device_list))) {
+ struct rkvr_iio_hw_device *p;
+
+ list_for_each_entry(p, &rkvr_hid_hw_device_list, l) {
+ if (!strcmp(hw_device->name, p->name)) {
+ pr_err("%s already exist ,abort\n", hw_device->name);
+ return -1;
+ }
+ }
+ }
+ list_add_tail(&hw_device->l, &rkvr_hid_hw_device_list);
+ mutex_unlock(&device_list_lock);
+ return 0;
+}
+
+static void inv_hid_unregister_and_destroy_devcie_by_name(const char *name)
+{
+ struct rkvr_iio_hw_device *p = NULL;
+
+ mutex_lock(&device_list_lock);
+ list_for_each_entry(p, &rkvr_hid_hw_device_list, l) {
+ if (!strcmp(name, p->name)) {
+ list_del(&p->l);
+ break;
+ }
+ }
+ if (p) {
+ pr_info("find dev with name %s,free now\n", name);
+ inv_hid_free(p);
+ }
+ mutex_unlock(&device_list_lock);
+}
+
+static ssize_t rkvr_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 && rkvr_index < 15) {
+ if (++count_array[rkvr_index] >= 1000) {
+ unsigned long cur_jiffy = jiffies;
+
+ hid_dbg(list->hidraw->hid, "rkvr: %d Hz, read(%d) (%d:%s)\n", (int)(1000 * HZ / (cur_jiffy - old_jiffy_array[rkvr_index])), rkvr_index, current->pid, current->comm);
+ count_array[rkvr_index] = 0;
+ old_jiffy_array[rkvr_index] = cur_jiffy;
+ }
+ if (++rkvr_index >= opens)
+ rkvr_index = 0;
+ } else {
+ rkvr_index = 0;
+ }
+ }
+
+ kfree(list->buffer[list->tail].value);
+ list->buffer[list->tail].value = NULL;
+ list->tail = (list->tail + 1) & (RKVR_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 rkvr_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 (!rkvr_hidraw_table[minor] || !rkvr_hidraw_table[minor]->exist) {
+ ret = -ENODEV;
+ goto out;
+ }
+
+ dev = rkvr_hidraw_table[minor]->hid;
+
+ if (count > HID_MAX_BUFFER_SIZE) {
+ hid_warn(dev, "rkvr - pid %d passed too large report\n",
+ task_pid_nr(current));
+ ret = -EINVAL;
+ goto out;
+ }
+
+ if (count < 2) {
+ hid_warn(dev, "rkvr - 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 rkvr_hidraw_write(struct file *file, const char __user *buffer, size_t count, loff_t *ppos)
+{
+ ssize_t ret;
+
+ mutex_lock(&minors_lock);
+ ret = rkvr_hidraw_send_report(file, buffer, count, HID_OUTPUT_REPORT);
+ mutex_unlock(&minors_lock);
+ return ret;
+}
+
+/* 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 rkvr_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 = rkvr_hidraw_table[minor]->hid;
+
+ if (!dev->ll_driver->raw_request) {
+ ret = -ENODEV;
+ goto out;
+ }
+
+ if (count > HID_MAX_BUFFER_SIZE) {
+ hid_warn(dev, "rkvr - hidraw: pid %d passed too large report\n",
+ task_pid_nr(current));
+ ret = -EINVAL;
+ goto out;
+ }
+
+ if (count < 2) {
+ hid_warn(dev, "rkvr - 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 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 rkvr_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 rkvr_hidraw_open(struct inode *inode, struct file *file)
+{
+ unsigned int minor = iminor(inode);
+ struct hidraw *dev;
+ struct hidraw_list *list;
+ unsigned long flags;
+ int err = 0;
+
+ list = kzalloc(sizeof(*list), GFP_KERNEL);
+ if (!list) {
+ err = -ENOMEM;
+ goto out;
+ }
+
+ mutex_lock(&minors_lock);
+ if (!rkvr_hidraw_table[minor] || !rkvr_hidraw_table[minor]->exist) {
+ err = -ENODEV;
+ goto out_unlock;
+ }
+
+ dev = rkvr_hidraw_table[minor];
+ if (!dev->open++) {
+ err = hid_hw_power(dev->hid, PM_HINT_FULLON);
+ if (err < 0) {
+ dev->open--;
+ goto out_unlock;
+ }
+
+ err = hid_hw_open(dev->hid);
+
+ if (err < 0) {
+ hid_hw_power(dev->hid, PM_HINT_NORMAL);
+ dev->open--;
+ goto out_unlock;
+ }
+ }
+
+ list->hidraw = rkvr_hidraw_table[minor];
+ mutex_init(&list->read_mutex);
+ spin_lock_irqsave(&rkvr_hidraw_table[minor]->list_lock, flags);
+ list_add_tail(&list->node, &rkvr_hidraw_table[minor]->list);
+ spin_unlock_irqrestore(&rkvr_hidraw_table[minor]->list_lock, flags);
+ file->private_data = list;
+
+ opens = dev->open;
+
+out_unlock:
+ mutex_unlock(&minors_lock);
+out:
+ if (err < 0)
+ kfree(list);
+
+ return err;
+}
+
+static int rkvr_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 void rkvr_drop_ref(struct hidraw *hidraw, int exists_bit)
+{
+ if (exists_bit) { /*hw removed**/
+ hidraw->exist = 0;
+ if (hidraw->open) {
+ hid_hw_close(hidraw->hid);
+ wake_up_interruptible(&hidraw->wait);
+ }
+ } else {
+ --hidraw->open;
+ }
+
+ if (!hidraw->open) {
+ if (!hidraw->exist) { /*no opened && no hardware,delete all**/
+ rkvr_hidraw_table[hidraw->minor] = NULL;
+ kfree(hidraw);
+ } else {
+ /* close device for last reader */
+ hid_hw_power(hidraw->hid, PM_HINT_NORMAL);
+ hid_hw_close(hidraw->hid);
+ }
+ }
+}
+
+static int rkvr_hidraw_release(struct inode *inode, struct file *file)
+{
+ unsigned int minor = iminor(inode);
+ struct hidraw_list *list = file->private_data;
+ unsigned long flags;
+
+ mutex_lock(&minors_lock);
+
+ spin_lock_irqsave(&rkvr_hidraw_table[minor]->list_lock, flags);
+ list_del(&list->node);
+ spin_unlock_irqrestore(&rkvr_hidraw_table[minor]->list_lock, flags);
+
+ kfree(list);
+ rkvr_drop_ref(rkvr_hidraw_table[minor], 0);
+
+ mutex_unlock(&minors_lock);
+
+ return 0;
+}
+
+static void rkvr_send_key_event(struct input_dev *input, int key_value, int state)
+{
+ if (!input) {
+ return;
+ }
+ if (state) {
+ input_report_key(input, key_value, 1);
+ input_sync(input);
+ } else {
+ input_report_key(input, key_value, 0);
+ input_sync(input);
+ }
+}
+
+static int rkvr_keys_event(struct hid_device *hdev, void *data, unsigned long len)
+{
+ struct input_dev *input = hdev->hiddev;
+ union rkvr_data_t *rkvr_data = (union rkvr_data_t *)data;
+
+ if (rkvr_data->rkvr_data.key_map.key_menu_up)
+ rkvr_send_key_event(input, KEY_MENU, 0);
+ else if (rkvr_data->rkvr_data.key_map.key_menu_down)
+ rkvr_send_key_event(input, KEY_MENU, 1);
+ else if (rkvr_data->rkvr_data.key_map.key_home_up)
+ rkvr_send_key_event(input, KEY_HOME, 0);
+ else if (rkvr_data->rkvr_data.key_map.key_home_down)
+ rkvr_send_key_event(input, KEY_HOME, 1);
+ else if (rkvr_data->rkvr_data.key_map.key_power_up)
+ rkvr_send_key_event(input, KEY_POWER, 0);
+ else if (rkvr_data->rkvr_data.key_map.key_power_down)
+ rkvr_send_key_event(input, KEY_POWER, 1);
+ else if (rkvr_data->rkvr_data.key_map.key_volup_up)
+ rkvr_send_key_event(input, KEY_VOLUMEUP, 0);
+ else if (rkvr_data->rkvr_data.key_map.key_volup_down)
+ rkvr_send_key_event(input, KEY_VOLUMEUP, 1);
+ else if (rkvr_data->rkvr_data.key_map.key_voldn_up)
+ rkvr_send_key_event(input, KEY_VOLUMEDOWN, 0);
+ else if (rkvr_data->rkvr_data.key_map.key_voldn_down)
+ rkvr_send_key_event(input, KEY_VOLUMEDOWN, 1);
+ return 0;
+}
+
+static int rkvr_report_event(struct hid_device *hid, u8 *data, int len)
+{
+ struct hidraw *dev = hid->hidraw;
+ struct hidraw_list *list;
+ int ret = 0;
+ unsigned long flags;
+ union rkvr_data_t *rkvr_data = (union rkvr_data_t *)data;
+ struct sensor_hid_data *pdata = hid_get_drvdata(hid);
+
+ spin_lock_irqsave(&dev->list_lock, flags);
+ if (hid->hiddev) {
+ rkvr_keys_event(hid, data, len);
+ }
+ if (pdata && pdata->priv && pdata->send_event) {
+ pdata->send_event(rkvr_data->buf, len, pdata->priv);
+ spin_unlock_irqrestore(&dev->list_lock, flags);
+ } else {
+ list_for_each_entry(list, &dev->list, node) {
+ int new_head = (list->head + 1) & (RKVR_HIDRAW_BUFFER_SIZE - 1);
+
+ if (new_head == list->tail)
+ continue;
+
+ list->buffer[list->head].value = kmemdup(data, len, GFP_ATOMIC);
+ if (!list->buffer[list->head].value) {
+ ret = -ENOMEM;
+ spin_unlock_irqrestore(&dev->list_lock, flags);
+ break;
+ }
+
+ list->buffer[list->head].len = len;
+ list->head = new_head;
+ kill_fasync(&list->fasync, SIGIO, POLL_IN);
+ }
+ spin_unlock_irqrestore(&dev->list_lock, flags);
+ wake_up_interruptible(&dev->wait);
+ }
+ return ret;
+}
+
+static void hid_report_fill_rw(unsigned char *buf, u8 reg, u8 *data, int len, int w)
+{
+ if (w)
+ buf[0] = (1 << 7) | (len && 0x7f);
+ else
+ buf[0] = len && 0x7f;
+ buf[1] = reg;
+ memcpy(&buf[2], data, len);
+}
+
+#if DEBUG_SYS
+#define HID_OUTPUT_READREG 3
+
+static int hid_report_readreg(struct device *dev, u8 reg, u8 *data, int len)
+{
+ struct hid_device *hid = container_of(dev, struct hid_device, dev);
+ unsigned char report_number = reg;
+ unsigned char report_type = HID_OUTPUT_READREG;
+ char buf[1 + sizeof(data) * len];
+ int readlen = 1 + sizeof(data) * len;
+ int ret;
+
+ ret = hid_hw_raw_request(hid, report_number, (unsigned char *)buf, readlen, report_type, HID_REQ_GET_REPORT);
+ if (ret != readlen) {
+ hid_info(hid, "id_hw_raw_request fail\n");
+ } else {
+ memcpy(data, &buf[1], readlen);
+ hid_info(hid, "hid_report_readreg %02x %02x\n", reg, data[0]);
+ }
+
+ return 0;
+}
+
+static int hid_report_writereg(struct device *dev, u8 reg, u8 data)
+{
+ struct hid_device *hid = container_of(dev, struct hid_device, dev);
+ unsigned char report_number = 5;
+ unsigned char report_type = HID_OUTPUT_REPORT;
+ char buf[3 + sizeof(data)];
+ int ret;
+
+ hid_report_fill_rw(&buf[1], reg, &data, sizeof(data), 1);
+ ret = hid_hw_raw_request(hid, report_number, (unsigned char *)buf, 4, report_type, HID_REQ_SET_REPORT);
+ if (ret != 4)
+ hid_info(hid, "id_hw_raw_request fail\n");
+ else
+ hid_info(hid, "id_hw_raw_request ok\n");
+
+ return 0;
+}
+
+static ssize_t rkvr_dev_attr_debug_store(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct hidraw *devraw;
+ struct hid_device *hid = container_of(dev, struct hid_device, dev);
+
+ devraw = dev_get_drvdata(dev);
+ if (0 == strncmp(buf, "write", 5))
+ hid_report_writereg(&devraw->hid->dev, 0, 0);
+ hid_info(hid, "%s\n", buf);
+
+ return count;
+}
+
+static ssize_t rkvr_dev_attr_debug_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ size_t count = 0;
+ u8 mpu6500_id = 0;
+ struct hidraw *devraw;
+
+ devraw = dev_get_drvdata(dev);
+ if (!hid_report_readreg(&devraw->hid->dev, 0x75 | 0x80, &mpu6500_id, 1))
+ count += sprintf(&buf[count], "reg value %d\n", mpu6500_id);
+ else
+ count += sprintf(&buf[count], "read fail\n");
+
+ return count;
+}
+static DEVICE_ATTR(debug, 0664, rkvr_dev_attr_debug_show, rkvr_dev_attr_debug_store);
+#endif
+
+static int rkvr_hid_read(struct rkvr_iio_hw_device *hdev, int reg, unsigned char *data, int len)
+{
+ struct hid_device *hid = container_of(hdev->dev, struct hid_device, dev);
+ unsigned char report_number = reg;
+ unsigned char report_type = HID_OUTPUT_READREG;
+ char buf[1 + sizeof(data) * len];
+ int readlen = 1 + sizeof(data) * len;
+ int ret;
+
+ ret = hid_hw_raw_request(hid, report_number, (unsigned char *)buf, readlen, report_type, HID_REQ_GET_REPORT);
+ if (ret != readlen) {
+ hid_err(hid, "id_hw_raw_request fail\n");
+ } else {
+ memcpy(data, &buf[1], sizeof(data) * len);
+ }
+
+ return 0;
+}
+
+static int rkvr_hid_write(struct rkvr_iio_hw_device *hdev, int reg, unsigned char data)
+{
+ struct hid_device *hid = container_of(hdev->dev, struct hid_device, dev);
+ unsigned char report_number = 5;
+ unsigned char report_type = HID_OUTPUT_REPORT;
+ char buf[3 + sizeof(data)];
+ int ret;
+
+ hid_report_fill_rw(&buf[1], reg, &data, sizeof(data), 1);
+ ret = hid_hw_raw_request(hid, report_number, (unsigned char *)buf, 4, report_type, HID_REQ_SET_REPORT);
+ if (ret != 4)
+ hid_info(hid, "id_hw_raw_request fail\n");
+ else
+ hid_info(hid, "id_hw_raw_request ok\n");
+
+ return 0;
+}
+
+static int rkvr_hid_open(struct rkvr_iio_hw_device *hdev)
+{
+ struct hid_device *hid;
+ int err;
+
+ hid = container_of(hdev->dev, struct hid_device, dev);
+ err = hid_hw_power(hid, PM_HINT_FULLON);
+ if (err < 0)
+ return err;
+ err = hid_hw_open(hid);
+ if (err < 0) {
+ hid_hw_power(hid, PM_HINT_NORMAL);
+ return err;
+ }
+
+ return 0;
+}
+
+static void rkvr_hid_close(struct rkvr_iio_hw_device *hdev)
+{
+ struct hid_device *hid;
+
+ hid = container_of(hdev->dev, struct hid_device, dev);
+ hid_hw_power(hid, PM_HINT_NORMAL);
+ hid_hw_close(hid);
+}
+
+#if DYNAMIC_LOAD_MPU6500
+static int register_mpu6500;
+struct platform_device mpu6500_dev = {
+ .name = "mpu6500",
+};
+#endif
+
+static int rkvr_connect(struct hid_device *hid)
+{
+ int minor, result;
+ struct hidraw *dev;
+
+ /* we accept any HID device, no matter the applications */
+ dev = kzalloc(sizeof(*dev), GFP_KERNEL);
+ if (!dev)
+ return -ENOMEM;
+ result = -EINVAL;
+ mutex_lock(&minors_lock);
+ for (minor = 0; minor < RKVR_HIDRAW_MAX_DEVICES; minor++) {
+ if (rkvr_hidraw_table[minor])
+ continue;
+ rkvr_hidraw_table[minor] = dev;
+ result = 0;
+ break;
+ }
+ if (result) {
+ mutex_unlock(&minors_lock);
+ kfree(dev);
+ goto out;
+ }
+
+ dev->dev = device_create(rkvr_class, &hid->dev, MKDEV(rkvr_major, minor),
+ NULL, "%s%d", "rkvr", minor);
+
+ if (IS_ERR(dev->dev)) {
+ rkvr_hidraw_table[minor] = NULL;
+ mutex_unlock(&minors_lock);
+ result = PTR_ERR(dev->dev);
+ kfree(dev);
+ goto out;
+ }
+
+ dev_set_drvdata(dev->dev, dev);
+#if DEBUG_SYS
+ device_create_file(dev->dev, &dev_attr_debug);
+#endif
+
+ {
+ struct rkvr_iio_hw_device *hw_device;
+
+ hw_device = inv_hid_alloc("hid-rkvr");
+ if (!hw_device) {
+ hid_err(hid, "inv_hid_alloc(\"hid-rkvr\") fail\n");
+ rkvr_hidraw_table[minor] = NULL;
+ mutex_unlock(&minors_lock);
+ result = PTR_ERR(dev->dev);
+ kfree(dev);
+ goto out;
+ }
+ hw_device->dev = &hid->dev;
+ hw_device->open = rkvr_hid_open;
+ hw_device->close = rkvr_hid_close;
+ hw_device->read = rkvr_hid_read;
+ hw_device->write = rkvr_hid_write;
+ if (inv_hid_register_devcie(hw_device)) {
+ hid_err(hid, "inv_hid_register_devcie(\"hid-rkvr\") fail\n");
+ inv_hid_free(hw_device);
+ rkvr_hidraw_table[minor] = NULL;
+ mutex_unlock(&minors_lock);
+ result = PTR_ERR(dev->dev);
+ kfree(dev);
+ goto out;
+ }
+ }
+
+#if DYNAMIC_LOAD_MPU6500
+ if (!register_mpu6500) {
+ register_mpu6500 = 1;
+ hid_info(hid, "--->platform_device_register-->\n");
+ platform_device_register(&mpu6500_dev);
+ }
+#endif
+
+ if (hid_hw_open(hid)) {
+ rkvr_hidraw_table[minor] = NULL;
+ mutex_unlock(&minors_lock);
+ result = PTR_ERR(dev->dev);
+ kfree(dev);
+ hid_err(hid, "rkvr_connect:hid_hw_open fail\n");
+ goto out;
+ }
+
+ init_waitqueue_head(&dev->wait);
+ spin_lock_init(&dev->list_lock);
+ INIT_LIST_HEAD(&dev->list);
+
+ dev->hid = hid;
+ dev->minor = minor;
+ dev->exist = 1;
+ hid->hidraw = dev; /*struct hidraw * **/
+ mutex_unlock(&minors_lock);
+out:
+ return result;
+}
+
+static int rkvr_keys_remove(struct hid_device *hdev)
+{
+ struct input_dev *input = hdev->hiddev;
+
+ input_unregister_device(input);
+ return 0;
+}
+
+static unsigned int key_codes[] = {
+ KEY_MENU,
+ KEY_HOME,
+ KEY_POWER,
+ KEY_VOLUMEUP,
+ KEY_VOLUMEDOWN,
+ KEY_WAKEUP
+};
+
+static int __must_check rkvr_keys_probe(struct hid_device *hdev)
+{
+
+ struct device *dev = &hdev->dev;
+ struct input_dev *input = NULL;
+ int i, error = 0;
+
+ input = devm_input_allocate_device(dev);
+ if (!input) {
+ hid_err(hdev, "input_allocate_device fail\n");
+ return -ENOMEM;
+ }
+ input->name = "rkvr-keypad";
+ input->phys = "rkvr-keys/input0";
+ input->dev.parent = dev;
+ input->id.bustype = BUS_HOST;
+ input->id.vendor = 0x071b;
+ input->id.product = 0x3205;
+ input->id.version = 0x0001;
+
+ for (i = 0; i < sizeof(key_codes) / sizeof(key_codes[0]); i++) {
+ hid_info(hdev, "input_set_capability %d\n", key_codes[i]);
+ input_set_capability(input, EV_KEY, key_codes[i]);
+ }
+
+ error = input_register_device(input);
+ if (error) {
+ hid_err(hdev, "rkvr-s: Unable to register input device, error: %d\n", error);
+ return error;
+ }
+ hdev->hiddev = input;
+
+ return 0;
+}
+
+static inline int __must_check rkvr_hw_start(struct hid_device *hdev, unsigned int connect_mask)
+{
+ int ret = hdev->ll_driver->start(hdev);
+
+ if (ret)
+ return ret;
+ ret = rkvr_connect(hdev);
+ if (ret)
+ hdev->ll_driver->stop(hdev);
+
+ return ret;
+}
+
+static void rkvr_disconnect(struct hid_device *hid)
+{
+ struct hidraw *hidraw = hid->hidraw;
+
+ mutex_lock(&minors_lock);
+ /* always unregistering inv_hid_device when hardware disconnect */
+ inv_hid_unregister_and_destroy_devcie_by_name("hid-rkvr");
+#if DEBUG_SYS
+ device_remove_file(hidraw->dev, &dev_attr_debug);
+#endif
+
+ device_destroy(rkvr_class, MKDEV(rkvr_major, hidraw->minor));
+ rkvr_drop_ref(hidraw, 1);
+ mutex_unlock(&minors_lock);
+}
+
+static void rkvr_hw_stop(struct hid_device *hdev)
+{
+ rkvr_disconnect(hdev);
+ hdev->ll_driver->stop(hdev);
+}
+
+static long rkvr_hidraw_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
+{
+ struct inode *inode = file_inode(file);
+ unsigned int minor = iminor(inode);
+ long ret = 0;
+ struct hidraw *dev;
+ void __user *user_arg = (void __user *)arg;
+
+ mutex_lock(&minors_lock);
+ dev = rkvr_hidraw_table[minor];
+ if (!dev) {
+ ret = -ENODEV;
+ goto out;
+ }
+
+ switch (cmd) {
+ case HIDIOCGRDESCSIZE:
+ if (put_user(dev->hid->rsize, (int __user *)arg))
+ ret = -EFAULT;
+ break;
+
+ case HIDIOCGRDESC:
+ {
+ __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;
+ break;
+ }
+ case HIDIOCGRAWINFO:
+ {
+ struct hidraw_devinfo dinfo;
+
+ dinfo.bustype = dev->hid->bus;
+ dinfo.vendor = dev->hid->vendor;
+ dinfo.product = dev->hid->product;
+ if (copy_to_user(user_arg, &dinfo, sizeof(dinfo)))
+ ret = -EFAULT;
+ break;
+ }
+ default:
+ {
+ struct hid_device *hid = dev->hid;
+
+ if (_IOC_TYPE(cmd) != 'H') {
+ ret = -EINVAL;
+ break;
+ }
+
+ if (_IOC_NR(cmd) == _IOC_NR(HIDIOCSFEATURE(0))) {
+ int len = _IOC_SIZE(cmd);
+
+ ret = rkvr_hidraw_send_report(file, user_arg, len, HID_FEATURE_REPORT);
+ break;
+ }
+ if (_IOC_NR(cmd) == _IOC_NR(HIDIOCGFEATURE(0))) {
+ int len = _IOC_SIZE(cmd);
+
+ ret = rkvr_hidraw_get_report(file, user_arg, len, HID_FEATURE_REPORT);
+ break;
+ }
+
+ /* Begin Read-only ioctls. */
+ if (_IOC_DIR(cmd) != _IOC_READ) {
+ ret = -EINVAL;
+ break;
+ }
+
+ if (_IOC_NR(cmd) == _IOC_NR(HIDIOCGRAWNAME(0))) {
+ 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;
+ break;
+ }
+
+ if (_IOC_NR(cmd) == _IOC_NR(HIDIOCGRAWPHYS(0))) {
+ 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;
+ break;
+ }
+ }
+
+ ret = -ENOTTY;
+ }
+out:
+ mutex_unlock(&minors_lock);
+ return ret;
+}
+
+static const struct file_operations rkvr_ops = {
+ .owner = THIS_MODULE,
+ .read = rkvr_hidraw_read,
+ .write = rkvr_hidraw_write,
+ .poll = rkvr_hidraw_poll,
+ .open = rkvr_hidraw_open,
+ .release = rkvr_hidraw_release,
+ .unlocked_ioctl = rkvr_hidraw_ioctl,
+#ifdef CONFIG_COMPAT
+ .compat_ioctl = rkvr_hidraw_ioctl,
+#endif
+ .fasync = rkvr_hidraw_fasync,
+ .llseek = noop_llseek,
+};
+
+int rkvr_sensor_register_callback(int (*callback)(char *, size_t, void *), void *priv)
+{
+ sensorData.priv = priv;
+ sensorData.send_event = callback;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(rkvr_sensor_register_callback);
+
+static int rkvr_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, "rkvr - parse failed\n");
+ goto exit;
+ }
+ hid_set_drvdata(hdev, &sensorData);
+ if (intf->cur_altsetting->desc.bInterfaceNumber == RKVR_INTERFACE_USB_SENSOR_ID) {
+ retval = rkvr_keys_probe(hdev);
+ if (retval) {
+ hid_err(hdev, "rkvr_keys_probe failed\n");
+ goto exit_stop;
+ }
+ retval = rkvr_hw_start(hdev, 0);
+ if (retval) {
+ hid_err(hdev, "rkvr - rkvr hw start failed\n");
+ rkvr_keys_remove(hdev);
+ goto exit_stop;
+ }
+ } else {
+ retval = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
+ if (retval) {
+ hid_err(hdev, "rkvr - hid hw start failed\n");
+ goto exit;
+ }
+ }
+
+ return 0;
+
+exit_stop:
+ hid_hw_stop(hdev);
+exit:
+ return retval;
+}
+
+static void rkvr_remove(struct hid_device *hdev)
+{
+ struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
+
+ if (intf->cur_altsetting->desc.bInterfaceNumber == RKVR_INTERFACE_USB_SENSOR_ID) {
+ rkvr_keys_remove(hdev);
+ rkvr_hw_stop(hdev);
+ } else {
+ hid_hw_stop(hdev);
+ }
+}
+
+static int rkvr_raw_event(struct hid_device *hdev, struct hid_report *report, u8 *data, int size)
+{
+ int retval = 0;
+ static unsigned int count;
+ static unsigned long old_jiffy;
+
+ struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
+
+ if (intf->cur_altsetting->desc.bInterfaceNumber != RKVR_INTERFACE_USB_SENSOR_ID) {
+ hid_info(hdev, "%s,ignored interface number is %d\n", __func__,
+ intf->cur_altsetting->desc.bInterfaceNumber);
+ return 0;
+ }
+
+ /* print sensor poll frequency */
+ if (++count >= 1000) {
+ unsigned long cur_jiffy = jiffies;
+
+ hid_info(hdev, "rkvr: %d Hz, hidrkvr %d\n", (int)(1000 * HZ / (cur_jiffy - old_jiffy)), (hdev->hidraw ? 1 : 0));
+ count = 0;
+ old_jiffy = cur_jiffy;
+ }
+
+ if (hdev->hidraw || hdev->hiddev) {
+ retval = rkvr_report_event(hdev, data, size);
+ if (retval < 0)
+ hid_info(hdev, "rkvr: raw event err %d\n", retval);
+ }
+
+ return retval;
+}
+
+static const struct hid_device_id rkvr_devices[] = {
+ { HID_USB_DEVICE(USB_VENDOR_ID_ROCKCHIP, USB_DEVICE_ID_NANOC) },
+ { }
+};
+
+MODULE_DEVICE_TABLE(hid, rkvr_devices);
+
+static struct hid_driver rkvr_driver = {
+ .name = "rkvr",
+ .id_table = rkvr_devices,
+ .probe = rkvr_probe,
+ .remove = rkvr_remove,
+ .raw_event = rkvr_raw_event
+};
+
+static int __init rkvr_init(void)
+{
+ int retval;
+ dev_t dev_id;
+
+ rkvr_class = class_create(THIS_MODULE, "rkvr");
+ if (IS_ERR(rkvr_class))
+ return PTR_ERR(rkvr_class);
+
+ retval = hid_register_driver(&rkvr_driver);
+ if (retval < 0) {
+ pr_warn("rkvr_init - Can't register drive.\n");
+ goto out_class;
+ }
+
+ retval = alloc_chrdev_region(&dev_id, RKVR_FIRST_MINOR,
+ RKVR_HIDRAW_MAX_DEVICES, "rkvr");
+ if (retval < 0) {
+ pr_warn("rkvr_init - Can't allocate chrdev region.\n");
+ goto out_register;
+ }
+
+ rkvr_major = MAJOR(dev_id);
+ cdev_init(&rkvr_cdev, &rkvr_ops);
+ cdev_add(&rkvr_cdev, dev_id, RKVR_HIDRAW_MAX_DEVICES);
+ return 0;
+
+out_register:
+ hid_unregister_driver(&rkvr_driver);
+out_class:
+ class_destroy(rkvr_class);
+
+ return retval;
+}
+
+static void __exit rkvr_exit(void)
+{
+ dev_t dev_id = MKDEV(rkvr_major, 0);
+
+ cdev_del(&rkvr_cdev);
+
+ unregister_chrdev_region(dev_id, RKVR_HIDRAW_MAX_DEVICES);
+
+ hid_unregister_driver(&rkvr_driver);
+ class_destroy(rkvr_class);
+}
+
+module_init(rkvr_init);
+module_exit(rkvr_exit);
+
+MODULE_AUTHOR("zwp");
+MODULE_DESCRIPTION("USB ROCKCHIP VR char device driver.");
+MODULE_LICENSE("GPL v2");
projects / firefly-linux-kernel-4.4.55.git / commitdiff