--- /dev/null
+/*
+ * Roccat common functions for device specific drivers
+ *
+ * Copyright (c) 2011 Stefan Achatz <erazor_de@users.sourceforge.net>
+ */
+
+/*
+ * 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/hid.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include "hid-roccat-common.h"
+
+static inline uint16_t roccat_common2_feature_report(uint8_t report_id)
+{
+ return 0x300 | report_id;
+}
+
+int roccat_common2_receive(struct usb_device *usb_dev, uint report_id,
+ void *data, uint size)
+{
+ char *buf;
+ int len;
+
+ buf = kmalloc(size, GFP_KERNEL);
+ if (buf == NULL)
+ return -ENOMEM;
+
+ len = usb_control_msg(usb_dev, usb_rcvctrlpipe(usb_dev, 0),
+ HID_REQ_GET_REPORT,
+ USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,
+ roccat_common2_feature_report(report_id),
+ 0, buf, size, USB_CTRL_SET_TIMEOUT);
+
+ memcpy(data, buf, size);
+ kfree(buf);
+ return ((len < 0) ? len : ((len != size) ? -EIO : 0));
+}
+EXPORT_SYMBOL_GPL(roccat_common2_receive);
+
+int roccat_common2_send(struct usb_device *usb_dev, uint report_id,
+ void const *data, uint size)
+{
+ char *buf;
+ int len;
+
+ buf = kmemdup(data, size, GFP_KERNEL);
+ if (buf == NULL)
+ return -ENOMEM;
+
+ len = usb_control_msg(usb_dev, usb_sndctrlpipe(usb_dev, 0),
+ HID_REQ_SET_REPORT,
+ USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_OUT,
+ roccat_common2_feature_report(report_id),
+ 0, buf, size, USB_CTRL_SET_TIMEOUT);
+
+ kfree(buf);
+ return ((len < 0) ? len : ((len != size) ? -EIO : 0));
+}
+EXPORT_SYMBOL_GPL(roccat_common2_send);
+
+enum roccat_common2_control_states {
+ ROCCAT_COMMON_CONTROL_STATUS_CRITICAL = 0,
+ ROCCAT_COMMON_CONTROL_STATUS_OK = 1,
+ ROCCAT_COMMON_CONTROL_STATUS_INVALID = 2,
+ ROCCAT_COMMON_CONTROL_STATUS_BUSY = 3,
+ ROCCAT_COMMON_CONTROL_STATUS_CRITICAL_NEW = 4,
+};
+
+static int roccat_common2_receive_control_status(struct usb_device *usb_dev)
+{
+ int retval;
+ struct roccat_common2_control control;
+
+ do {
+ msleep(50);
+ retval = roccat_common2_receive(usb_dev,
+ ROCCAT_COMMON_COMMAND_CONTROL,
+ &control, sizeof(struct roccat_common2_control));
+
+ if (retval)
+ return retval;
+
+ switch (control.value) {
+ case ROCCAT_COMMON_CONTROL_STATUS_OK:
+ return 0;
+ case ROCCAT_COMMON_CONTROL_STATUS_BUSY:
+ msleep(500);
+ continue;
+ case ROCCAT_COMMON_CONTROL_STATUS_INVALID:
+ case ROCCAT_COMMON_CONTROL_STATUS_CRITICAL:
+ case ROCCAT_COMMON_CONTROL_STATUS_CRITICAL_NEW:
+ return -EINVAL;
+ default:
+ dev_err(&usb_dev->dev,
+ "roccat_common2_receive_control_status: "
+ "unknown response value 0x%x\n",
+ control.value);
+ return -EINVAL;
+ }
+
+ } while (1);
+}
+
+int roccat_common2_send_with_status(struct usb_device *usb_dev,
+ uint command, void const *buf, uint size)
+{
+ int retval;
+
+ retval = roccat_common2_send(usb_dev, command, buf, size);
+ if (retval)
+ return retval;
+
+ msleep(100);
+
+ return roccat_common2_receive_control_status(usb_dev);
+}
+EXPORT_SYMBOL_GPL(roccat_common2_send_with_status);
+
+int roccat_common2_device_init_struct(struct usb_device *usb_dev,
+ struct roccat_common2_device *dev)
+{
+ mutex_init(&dev->lock);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(roccat_common2_device_init_struct);
+
+ssize_t roccat_common2_sysfs_read(struct file *fp, struct kobject *kobj,
+ char *buf, loff_t off, size_t count,
+ size_t real_size, uint command)
+{
+ struct device *dev =
+ container_of(kobj, struct device, kobj)->parent->parent;
+ struct roccat_common2_device *roccat_dev = hid_get_drvdata(dev_get_drvdata(dev));
+ struct usb_device *usb_dev = interface_to_usbdev(to_usb_interface(dev));
+ int retval;
+
+ if (off >= real_size)
+ return 0;
+
+ if (off != 0 || count != real_size)
+ return -EINVAL;
+
+ mutex_lock(&roccat_dev->lock);
+ retval = roccat_common2_receive(usb_dev, command, buf, real_size);
+ mutex_unlock(&roccat_dev->lock);
+
+ return retval ? retval : real_size;
+}
+EXPORT_SYMBOL_GPL(roccat_common2_sysfs_read);
+
+ssize_t roccat_common2_sysfs_write(struct file *fp, struct kobject *kobj,
+ void const *buf, loff_t off, size_t count,
+ size_t real_size, uint command)
+{
+ struct device *dev =
+ container_of(kobj, struct device, kobj)->parent->parent;
+ struct roccat_common2_device *roccat_dev = hid_get_drvdata(dev_get_drvdata(dev));
+ struct usb_device *usb_dev = interface_to_usbdev(to_usb_interface(dev));
+ int retval;
+
+ if (off != 0 || count != real_size)
+ return -EINVAL;
+
+ mutex_lock(&roccat_dev->lock);
+ retval = roccat_common2_send_with_status(usb_dev, command, buf, real_size);
+ mutex_unlock(&roccat_dev->lock);
+
+ return retval ? retval : real_size;
+}
+EXPORT_SYMBOL_GPL(roccat_common2_sysfs_write);
+
+MODULE_AUTHOR("Stefan Achatz");
+MODULE_DESCRIPTION("USB Roccat common driver");
+MODULE_LICENSE("GPL v2");
Code Review / kvmfornfv.git / blobdiff