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![Thomas Gleixner](/assets/img/avatar_default.png)
Based on 1 normalized pattern(s): 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 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 3029 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
175 lines
4.5 KiB
C
175 lines
4.5 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Roccat common functions for device specific drivers
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*
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* Copyright (c) 2011 Stefan Achatz <erazor_de@users.sourceforge.net>
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*/
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/*
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*/
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#include <linux/hid.h>
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#include <linux/slab.h>
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#include <linux/module.h>
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#include "hid-roccat-common.h"
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static inline uint16_t roccat_common2_feature_report(uint8_t report_id)
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{
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return 0x300 | report_id;
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}
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int roccat_common2_receive(struct usb_device *usb_dev, uint report_id,
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void *data, uint size)
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{
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char *buf;
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int len;
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buf = kmalloc(size, GFP_KERNEL);
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if (buf == NULL)
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return -ENOMEM;
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len = usb_control_msg(usb_dev, usb_rcvctrlpipe(usb_dev, 0),
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HID_REQ_GET_REPORT,
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USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,
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roccat_common2_feature_report(report_id),
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0, buf, size, USB_CTRL_SET_TIMEOUT);
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memcpy(data, buf, size);
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kfree(buf);
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return ((len < 0) ? len : ((len != size) ? -EIO : 0));
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}
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EXPORT_SYMBOL_GPL(roccat_common2_receive);
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int roccat_common2_send(struct usb_device *usb_dev, uint report_id,
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void const *data, uint size)
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{
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char *buf;
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int len;
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buf = kmemdup(data, size, GFP_KERNEL);
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if (buf == NULL)
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return -ENOMEM;
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len = usb_control_msg(usb_dev, usb_sndctrlpipe(usb_dev, 0),
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HID_REQ_SET_REPORT,
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USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_OUT,
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roccat_common2_feature_report(report_id),
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0, buf, size, USB_CTRL_SET_TIMEOUT);
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kfree(buf);
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return ((len < 0) ? len : ((len != size) ? -EIO : 0));
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}
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EXPORT_SYMBOL_GPL(roccat_common2_send);
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enum roccat_common2_control_states {
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ROCCAT_COMMON_CONTROL_STATUS_CRITICAL = 0,
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ROCCAT_COMMON_CONTROL_STATUS_OK = 1,
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ROCCAT_COMMON_CONTROL_STATUS_INVALID = 2,
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ROCCAT_COMMON_CONTROL_STATUS_BUSY = 3,
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ROCCAT_COMMON_CONTROL_STATUS_CRITICAL_NEW = 4,
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};
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static int roccat_common2_receive_control_status(struct usb_device *usb_dev)
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{
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int retval;
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struct roccat_common2_control control;
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do {
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msleep(50);
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retval = roccat_common2_receive(usb_dev,
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ROCCAT_COMMON_COMMAND_CONTROL,
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&control, sizeof(struct roccat_common2_control));
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if (retval)
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return retval;
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switch (control.value) {
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case ROCCAT_COMMON_CONTROL_STATUS_OK:
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return 0;
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case ROCCAT_COMMON_CONTROL_STATUS_BUSY:
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msleep(500);
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continue;
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case ROCCAT_COMMON_CONTROL_STATUS_INVALID:
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case ROCCAT_COMMON_CONTROL_STATUS_CRITICAL:
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case ROCCAT_COMMON_CONTROL_STATUS_CRITICAL_NEW:
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return -EINVAL;
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default:
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dev_err(&usb_dev->dev,
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"roccat_common2_receive_control_status: "
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"unknown response value 0x%x\n",
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control.value);
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return -EINVAL;
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}
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} while (1);
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}
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int roccat_common2_send_with_status(struct usb_device *usb_dev,
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uint command, void const *buf, uint size)
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{
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int retval;
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retval = roccat_common2_send(usb_dev, command, buf, size);
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if (retval)
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return retval;
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msleep(100);
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return roccat_common2_receive_control_status(usb_dev);
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}
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EXPORT_SYMBOL_GPL(roccat_common2_send_with_status);
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int roccat_common2_device_init_struct(struct usb_device *usb_dev,
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struct roccat_common2_device *dev)
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{
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mutex_init(&dev->lock);
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return 0;
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}
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EXPORT_SYMBOL_GPL(roccat_common2_device_init_struct);
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ssize_t roccat_common2_sysfs_read(struct file *fp, struct kobject *kobj,
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char *buf, loff_t off, size_t count,
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size_t real_size, uint command)
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{
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struct device *dev = kobj_to_dev(kobj)->parent->parent;
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struct roccat_common2_device *roccat_dev = hid_get_drvdata(dev_get_drvdata(dev));
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struct usb_device *usb_dev = interface_to_usbdev(to_usb_interface(dev));
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int retval;
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if (off >= real_size)
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return 0;
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if (off != 0 || count != real_size)
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return -EINVAL;
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mutex_lock(&roccat_dev->lock);
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retval = roccat_common2_receive(usb_dev, command, buf, real_size);
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mutex_unlock(&roccat_dev->lock);
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return retval ? retval : real_size;
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}
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EXPORT_SYMBOL_GPL(roccat_common2_sysfs_read);
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ssize_t roccat_common2_sysfs_write(struct file *fp, struct kobject *kobj,
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void const *buf, loff_t off, size_t count,
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size_t real_size, uint command)
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{
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struct device *dev = kobj_to_dev(kobj)->parent->parent;
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struct roccat_common2_device *roccat_dev = hid_get_drvdata(dev_get_drvdata(dev));
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struct usb_device *usb_dev = interface_to_usbdev(to_usb_interface(dev));
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int retval;
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if (off != 0 || count != real_size)
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return -EINVAL;
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mutex_lock(&roccat_dev->lock);
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retval = roccat_common2_send_with_status(usb_dev, command, buf, real_size);
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mutex_unlock(&roccat_dev->lock);
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return retval ? retval : real_size;
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}
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EXPORT_SYMBOL_GPL(roccat_common2_sysfs_write);
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MODULE_AUTHOR("Stefan Achatz");
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MODULE_DESCRIPTION("USB Roccat common driver");
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MODULE_LICENSE("GPL v2");
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