/*
- * Force feedback support for Logitech Speed Force Wireless
+ * Force feedback support for Logitech Gaming Wheels
*
- * http://wiibrew.org/wiki/Logitech_USB_steering_wheel
+ * Including G27, G25, DFP, DFGT, FFEX, Momo, Momo2 &
+ * Speed Force Wireless (WiiWheel)
*
* Copyright (c) 2010 Simon Wood <simon@mungewell.org>
*/
static DEVICE_ATTR(range, S_IRWXU | S_IRWXG | S_IRWXO, lg4ff_range_show, lg4ff_range_store);
-static bool list_inited;
-
struct lg4ff_device_entry {
- char *device_id; /* Use name in respective kobject structure's address as the ID */
__u16 range;
__u16 min_range;
__u16 max_range;
- __u8 leds;
+#ifdef CONFIG_LEDS_CLASS
+ __u8 led_state;
+ struct led_classdev *led[5];
+#endif
struct list_head list;
void (*set_range)(struct hid_device *hid, u16 range);
};
-static struct lg4ff_device_entry device_list;
-
static const signed short lg4ff_wheel_effects[] = {
FF_CONSTANT,
FF_AUTOCENTER,
/* Read current range and display it in terminal */
static ssize_t lg4ff_range_show(struct device *dev, struct device_attribute *attr, char *buf)
{
- struct lg4ff_device_entry *uninitialized_var(entry);
- struct list_head *h;
struct hid_device *hid = to_hid_device(dev);
+ struct lg4ff_device_entry *entry;
+ struct lg_drv_data *drv_data;
size_t count;
- list_for_each(h, &device_list.list) {
- entry = list_entry(h, struct lg4ff_device_entry, list);
- if (strcmp(entry->device_id, (&hid->dev)->kobj.name) == 0)
- break;
+ drv_data = hid_get_drvdata(hid);
+ if (!drv_data) {
+ hid_err(hid, "Private driver data not found!\n");
+ return 0;
}
- if (h == &device_list.list) {
- dbg_hid("Device not found!");
+
+ entry = drv_data->device_props;
+ if (!entry) {
+ hid_err(hid, "Device properties not found!\n");
return 0;
}
* according to the type of the wheel */
static ssize_t lg4ff_range_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
{
- struct lg4ff_device_entry *uninitialized_var(entry);
- struct list_head *h;
struct hid_device *hid = to_hid_device(dev);
+ struct lg4ff_device_entry *entry;
+ struct lg_drv_data *drv_data;
__u16 range = simple_strtoul(buf, NULL, 10);
- list_for_each(h, &device_list.list) {
- entry = list_entry(h, struct lg4ff_device_entry, list);
- if (strcmp(entry->device_id, (&hid->dev)->kobj.name) == 0)
- break;
+ drv_data = hid_get_drvdata(hid);
+ if (!drv_data) {
+ hid_err(hid, "Private driver data not found!\n");
+ return 0;
}
- if (h == &device_list.list) {
- dbg_hid("Device not found!");
- return count;
+
+ entry = drv_data->device_props;
+ if (!entry) {
+ hid_err(hid, "Device properties not found!\n");
+ return 0;
}
if (range == 0)
return count;
}
+#ifdef CONFIG_LEDS_CLASS
+static void lg4ff_set_leds(struct hid_device *hid, __u8 leds)
+{
+ struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
+ struct hid_report *report = list_entry(report_list->next, struct hid_report, list);
+
+ report->field[0]->value[0] = 0xf8;
+ report->field[0]->value[1] = 0x12;
+ report->field[0]->value[2] = leds;
+ report->field[0]->value[3] = 0x00;
+ report->field[0]->value[4] = 0x00;
+ report->field[0]->value[5] = 0x00;
+ report->field[0]->value[6] = 0x00;
+ usbhid_submit_report(hid, report, USB_DIR_OUT);
+}
+
+static void lg4ff_led_set_brightness(struct led_classdev *led_cdev,
+ enum led_brightness value)
+{
+ struct device *dev = led_cdev->dev->parent;
+ struct hid_device *hid = container_of(dev, struct hid_device, dev);
+ struct lg_drv_data *drv_data = (struct lg_drv_data *)hid_get_drvdata(hid);
+ struct lg4ff_device_entry *entry;
+ int i, state = 0;
+
+ if (!drv_data) {
+ hid_err(hid, "Device data not found.");
+ return;
+ }
+
+ entry = (struct lg4ff_device_entry *)drv_data->device_props;
+
+ if (!entry) {
+ hid_err(hid, "Device properties not found.");
+ return;
+ }
+
+ for (i = 0; i < 5; i++) {
+ if (led_cdev != entry->led[i])
+ continue;
+ state = (entry->led_state >> i) & 1;
+ if (value == LED_OFF && state) {
+ entry->led_state &= ~(1 << i);
+ lg4ff_set_leds(hid, entry->led_state);
+ } else if (value != LED_OFF && !state) {
+ entry->led_state |= 1 << i;
+ lg4ff_set_leds(hid, entry->led_state);
+ }
+ break;
+ }
+}
+
+static enum led_brightness lg4ff_led_get_brightness(struct led_classdev *led_cdev)
+{
+ struct device *dev = led_cdev->dev->parent;
+ struct hid_device *hid = container_of(dev, struct hid_device, dev);
+ struct lg_drv_data *drv_data = (struct lg_drv_data *)hid_get_drvdata(hid);
+ struct lg4ff_device_entry *entry;
+ int i, value = 0;
+
+ if (!drv_data) {
+ hid_err(hid, "Device data not found.");
+ return LED_OFF;
+ }
+
+ entry = (struct lg4ff_device_entry *)drv_data->device_props;
+
+ if (!entry) {
+ hid_err(hid, "Device properties not found.");
+ return LED_OFF;
+ }
+
+ for (i = 0; i < 5; i++)
+ if (led_cdev == entry->led[i]) {
+ value = (entry->led_state >> i) & 1;
+ break;
+ }
+
+ return value ? LED_FULL : LED_OFF;
+}
+#endif
+
int lg4ff_init(struct hid_device *hid)
{
struct hid_input *hidinput = list_entry(hid->inputs.next, struct hid_input, list);
struct hid_report *report;
struct hid_field *field;
struct lg4ff_device_entry *entry;
+ struct lg_drv_data *drv_data;
struct usb_device_descriptor *udesc;
int error, i, j;
__u16 bcdDevice, rev_maj, rev_min;
dev->ff->set_autocenter(dev, 0);
}
- /* Initialize device_list if this is the first device to handle by lg4ff */
- if (!list_inited) {
- INIT_LIST_HEAD(&device_list.list);
- list_inited = 1;
+ /* Get private driver data */
+ drv_data = hid_get_drvdata(hid);
+ if (!drv_data) {
+ hid_err(hid, "Cannot add device, private driver data not allocated\n");
+ return -1;
}
- /* Add the device to device_list */
+ /* Initialize device properties */
entry = kzalloc(sizeof(struct lg4ff_device_entry), GFP_KERNEL);
if (!entry) {
- hid_err(hid, "Cannot add device, insufficient memory.\n");
- return -ENOMEM;
- }
- entry->device_id = kstrdup((&hid->dev)->kobj.name, GFP_KERNEL);
- if (!entry->device_id) {
- hid_err(hid, "Cannot set device_id, insufficient memory.\n");
- kfree(entry);
+ hid_err(hid, "Cannot add device, insufficient memory to allocate device properties.\n");
return -ENOMEM;
}
+ drv_data->device_props = entry;
+
entry->min_range = lg4ff_devices[i].min_range;
entry->max_range = lg4ff_devices[i].max_range;
entry->set_range = lg4ff_devices[i].set_range;
- list_add(&entry->list, &device_list.list);
/* Create sysfs interface */
error = device_create_file(&hid->dev, &dev_attr_range);
if (entry->set_range != NULL)
entry->set_range(hid, entry->range);
- hid_info(hid, "Force feedback for Logitech Speed Force Wireless by Simon Wood <simon@mungewell.org>\n");
+#ifdef CONFIG_LEDS_CLASS
+ /* register led subsystem - G27 only */
+ entry->led_state = 0;
+ for (j = 0; j < 5; j++)
+ entry->led[j] = NULL;
+
+ if (lg4ff_devices[i].product_id == USB_DEVICE_ID_LOGITECH_G27_WHEEL) {
+ struct led_classdev *led;
+ size_t name_sz;
+ char *name;
+
+ lg4ff_set_leds(hid, 0);
+
+ name_sz = strlen(dev_name(&hid->dev)) + 8;
+
+ for (j = 0; j < 5; j++) {
+ led = kzalloc(sizeof(struct led_classdev)+name_sz, GFP_KERNEL);
+ if (!led) {
+ hid_err(hid, "can't allocate memory for LED %d\n", j);
+ goto err;
+ }
+
+ name = (void *)(&led[1]);
+ snprintf(name, name_sz, "%s::RPM%d", dev_name(&hid->dev), j+1);
+ led->name = name;
+ led->brightness = 0;
+ led->max_brightness = 1;
+ led->brightness_get = lg4ff_led_get_brightness;
+ led->brightness_set = lg4ff_led_set_brightness;
+
+ entry->led[j] = led;
+ error = led_classdev_register(&hid->dev, led);
+
+ if (error) {
+ hid_err(hid, "failed to register LED %d. Aborting.\n", j);
+err:
+ /* Deregister LEDs (if any) */
+ for (j = 0; j < 5; j++) {
+ led = entry->led[j];
+ entry->led[j] = NULL;
+ if (!led)
+ continue;
+ led_classdev_unregister(led);
+ kfree(led);
+ }
+ goto out; /* Let the driver continue without LEDs */
+ }
+ }
+ }
+out:
+#endif
+ hid_info(hid, "Force feedback support for Logitech Gaming Wheels\n");
return 0;
}
int lg4ff_deinit(struct hid_device *hid)
{
- bool found = 0;
struct lg4ff_device_entry *entry;
- struct list_head *h, *g;
- list_for_each_safe(h, g, &device_list.list) {
- entry = list_entry(h, struct lg4ff_device_entry, list);
- if (strcmp(entry->device_id, (&hid->dev)->kobj.name) == 0) {
- list_del(h);
- kfree(entry->device_id);
- kfree(entry);
- found = 1;
- break;
- }
- }
+ struct lg_drv_data *drv_data;
+
+ device_remove_file(&hid->dev, &dev_attr_range);
- if (!found) {
- dbg_hid("Device entry not found!\n");
+ drv_data = hid_get_drvdata(hid);
+ if (!drv_data) {
+ hid_err(hid, "Error while deinitializing device, no private driver data.\n");
+ return -1;
+ }
+ entry = drv_data->device_props;
+ if (!entry) {
+ hid_err(hid, "Error while deinitializing device, no device properties data.\n");
return -1;
}
- device_remove_file(&hid->dev, &dev_attr_range);
+#ifdef CONFIG_LEDS_CLASS
+ {
+ int j;
+ struct led_classdev *led;
+
+ /* Deregister LEDs (if any) */
+ for (j = 0; j < 5; j++) {
+
+ led = entry->led[j];
+ entry->led[j] = NULL;
+ if (!led)
+ continue;
+ led_classdev_unregister(led);
+ kfree(led);
+ }
+ }
+#endif
+
+ /* Deallocate memory */
+ kfree(entry);
+
dbg_hid("Device successfully unregistered\n");
return 0;
}
projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / blobdiff