2012-05-20 20:44:54 +00:00
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/*
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* Roccat Savu driver for Linux
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*
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* Copyright (c) 2012 Stefan Achatz <erazor_de@users.sourceforge.net>
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*/
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/*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*/
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/* Roccat Savu is a gamer mouse with macro keys that can be configured in
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* 5 profiles.
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*/
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#include <linux/device.h>
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#include <linux/input.h>
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#include <linux/hid.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/hid-roccat.h>
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#include "hid-ids.h"
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#include "hid-roccat-common.h"
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#include "hid-roccat-savu.h"
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static struct class *savu_class;
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static ssize_t savu_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 =
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container_of(kobj, struct device, kobj)->parent->parent;
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struct savu_device *savu = 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(&savu->savu_lock);
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2012-05-20 20:45:04 +00:00
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retval = roccat_common2_receive(usb_dev, command, buf, real_size);
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2012-05-20 20:44:54 +00:00
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mutex_unlock(&savu->savu_lock);
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return retval ? retval : real_size;
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}
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static ssize_t savu_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 =
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container_of(kobj, struct device, kobj)->parent->parent;
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struct savu_device *savu = 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(&savu->savu_lock);
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2012-05-20 20:45:04 +00:00
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retval = roccat_common2_send_with_status(usb_dev, command,
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2012-05-20 20:44:59 +00:00
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(void *)buf, real_size);
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2012-05-20 20:44:54 +00:00
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mutex_unlock(&savu->savu_lock);
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return retval ? retval : real_size;
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}
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#define SAVU_SYSFS_W(thingy, THINGY) \
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static ssize_t savu_sysfs_write_ ## thingy(struct file *fp, \
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struct kobject *kobj, struct bin_attribute *attr, char *buf, \
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loff_t off, size_t count) \
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{ \
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return savu_sysfs_write(fp, kobj, buf, off, count, \
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SAVU_SIZE_ ## THINGY, SAVU_COMMAND_ ## THINGY); \
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}
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#define SAVU_SYSFS_R(thingy, THINGY) \
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static ssize_t savu_sysfs_read_ ## thingy(struct file *fp, \
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struct kobject *kobj, struct bin_attribute *attr, char *buf, \
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loff_t off, size_t count) \
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{ \
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return savu_sysfs_read(fp, kobj, buf, off, count, \
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SAVU_SIZE_ ## THINGY, SAVU_COMMAND_ ## THINGY); \
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}
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#define SAVU_SYSFS_RW(thingy, THINGY) \
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SAVU_SYSFS_W(thingy, THINGY) \
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SAVU_SYSFS_R(thingy, THINGY)
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#define SAVU_BIN_ATTRIBUTE_RW(thingy, THINGY) \
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{ \
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.attr = { .name = #thingy, .mode = 0660 }, \
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.size = SAVU_SIZE_ ## THINGY, \
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.read = savu_sysfs_read_ ## thingy, \
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.write = savu_sysfs_write_ ## thingy \
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}
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#define SAVU_BIN_ATTRIBUTE_R(thingy, THINGY) \
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{ \
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.attr = { .name = #thingy, .mode = 0440 }, \
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.size = SAVU_SIZE_ ## THINGY, \
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.read = savu_sysfs_read_ ## thingy, \
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}
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#define SAVU_BIN_ATTRIBUTE_W(thingy, THINGY) \
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{ \
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.attr = { .name = #thingy, .mode = 0220 }, \
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.size = SAVU_SIZE_ ## THINGY, \
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.write = savu_sysfs_write_ ## thingy \
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}
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SAVU_SYSFS_W(control, CONTROL)
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SAVU_SYSFS_RW(profile, PROFILE)
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SAVU_SYSFS_RW(general, GENERAL)
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SAVU_SYSFS_RW(buttons, BUTTONS)
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SAVU_SYSFS_RW(macro, MACRO)
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SAVU_SYSFS_R(info, INFO)
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2012-07-04 16:45:03 +00:00
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SAVU_SYSFS_RW(sensor, SENSOR)
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2012-05-20 20:44:54 +00:00
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static struct bin_attribute savu_bin_attributes[] = {
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SAVU_BIN_ATTRIBUTE_W(control, CONTROL),
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SAVU_BIN_ATTRIBUTE_RW(profile, PROFILE),
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SAVU_BIN_ATTRIBUTE_RW(general, GENERAL),
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SAVU_BIN_ATTRIBUTE_RW(buttons, BUTTONS),
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SAVU_BIN_ATTRIBUTE_RW(macro, MACRO),
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SAVU_BIN_ATTRIBUTE_R(info, INFO),
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2012-07-04 16:45:03 +00:00
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SAVU_BIN_ATTRIBUTE_RW(sensor, SENSOR),
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2012-05-20 20:44:54 +00:00
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__ATTR_NULL
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};
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static int savu_init_savu_device_struct(struct usb_device *usb_dev,
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struct savu_device *savu)
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{
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mutex_init(&savu->savu_lock);
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return 0;
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}
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static int savu_init_specials(struct hid_device *hdev)
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{
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struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
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struct usb_device *usb_dev = interface_to_usbdev(intf);
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struct savu_device *savu;
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int retval;
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if (intf->cur_altsetting->desc.bInterfaceProtocol
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!= USB_INTERFACE_PROTOCOL_MOUSE) {
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hid_set_drvdata(hdev, NULL);
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return 0;
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}
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savu = kzalloc(sizeof(*savu), GFP_KERNEL);
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if (!savu) {
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hid_err(hdev, "can't alloc device descriptor\n");
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return -ENOMEM;
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}
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hid_set_drvdata(hdev, savu);
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retval = savu_init_savu_device_struct(usb_dev, savu);
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if (retval) {
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hid_err(hdev, "couldn't init struct savu_device\n");
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goto exit_free;
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}
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retval = roccat_connect(savu_class, hdev,
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sizeof(struct savu_roccat_report));
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if (retval < 0) {
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hid_err(hdev, "couldn't init char dev\n");
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} else {
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savu->chrdev_minor = retval;
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savu->roccat_claimed = 1;
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}
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return 0;
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exit_free:
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kfree(savu);
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return retval;
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}
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static void savu_remove_specials(struct hid_device *hdev)
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{
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struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
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struct savu_device *savu;
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if (intf->cur_altsetting->desc.bInterfaceProtocol
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!= USB_INTERFACE_PROTOCOL_MOUSE)
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return;
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savu = hid_get_drvdata(hdev);
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if (savu->roccat_claimed)
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roccat_disconnect(savu->chrdev_minor);
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kfree(savu);
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}
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static int savu_probe(struct hid_device *hdev,
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const struct hid_device_id *id)
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{
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int retval;
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retval = hid_parse(hdev);
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if (retval) {
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hid_err(hdev, "parse failed\n");
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goto exit;
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}
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retval = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
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if (retval) {
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hid_err(hdev, "hw start failed\n");
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goto exit;
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}
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retval = savu_init_specials(hdev);
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if (retval) {
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hid_err(hdev, "couldn't install mouse\n");
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goto exit_stop;
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}
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return 0;
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exit_stop:
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hid_hw_stop(hdev);
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exit:
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return retval;
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}
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static void savu_remove(struct hid_device *hdev)
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{
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savu_remove_specials(hdev);
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hid_hw_stop(hdev);
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}
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static void savu_report_to_chrdev(struct savu_device const *savu,
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u8 const *data)
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{
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struct savu_roccat_report roccat_report;
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struct savu_mouse_report_special const *special_report;
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if (data[0] != SAVU_MOUSE_REPORT_NUMBER_SPECIAL)
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return;
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special_report = (struct savu_mouse_report_special const *)data;
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roccat_report.type = special_report->type;
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roccat_report.data[0] = special_report->data[0];
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roccat_report.data[1] = special_report->data[1];
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roccat_report_event(savu->chrdev_minor,
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(uint8_t const *)&roccat_report);
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}
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static int savu_raw_event(struct hid_device *hdev,
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struct hid_report *report, u8 *data, int size)
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{
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struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
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struct savu_device *savu = hid_get_drvdata(hdev);
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if (intf->cur_altsetting->desc.bInterfaceProtocol
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!= USB_INTERFACE_PROTOCOL_MOUSE)
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return 0;
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if (savu == NULL)
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return 0;
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if (savu->roccat_claimed)
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savu_report_to_chrdev(savu, data);
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return 0;
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}
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static const struct hid_device_id savu_devices[] = {
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{ HID_USB_DEVICE(USB_VENDOR_ID_ROCCAT, USB_DEVICE_ID_ROCCAT_SAVU) },
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{ }
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};
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MODULE_DEVICE_TABLE(hid, savu_devices);
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static struct hid_driver savu_driver = {
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.name = "savu",
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.id_table = savu_devices,
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.probe = savu_probe,
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.remove = savu_remove,
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.raw_event = savu_raw_event
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};
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static int __init savu_init(void)
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{
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int retval;
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savu_class = class_create(THIS_MODULE, "savu");
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if (IS_ERR(savu_class))
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return PTR_ERR(savu_class);
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savu_class->dev_bin_attrs = savu_bin_attributes;
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retval = hid_register_driver(&savu_driver);
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if (retval)
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class_destroy(savu_class);
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return retval;
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}
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static void __exit savu_exit(void)
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{
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hid_unregister_driver(&savu_driver);
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class_destroy(savu_class);
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}
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module_init(savu_init);
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module_exit(savu_exit);
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MODULE_AUTHOR("Stefan Achatz");
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MODULE_DESCRIPTION("USB Roccat Savu driver");
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MODULE_LICENSE("GPL v2");
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