--- /dev/null
+/***************************************************************************
+ * Copyright (C) 2010-2012 by Bruno Prémont <bonbons@linux-vserver.org> *
+ * *
+ * Based on Logitech G13 driver (v0.4) *
+ * Copyright (C) 2009 by Rick L. Vinyard, Jr. <rvinyard@cs.nmsu.edu> *
+ * *
+ * 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, version 2 of the License. *
+ * *
+ * This driver is distributed in the hope that it will be useful, but *
+ * WITHOUT ANY WARRANTY; without even the implied warranty of *
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
+ * General Public License for more details. *
+ * *
+ * You should have received a copy of the GNU General Public License *
+ * along with this software. If not see <http://www.gnu.org/licenses/>. *
+ ***************************************************************************/
+
+#include <linux/hid.h>
+#include <linux/hid-debug.h>
+#include <linux/input.h>
+#include "hid-ids.h"
+
+#include <linux/fb.h>
+#include <linux/vmalloc.h>
+#include <linux/backlight.h>
+#include <linux/lcd.h>
+
+#include <linux/leds.h>
+
+#include <linux/seq_file.h>
+#include <linux/debugfs.h>
+
+#include <linux/completion.h>
+#include <linux/uaccess.h>
+#include <linux/module.h>
+
+#include "hid-picolcd.h"
+
+
+void picolcd_leds_set(struct picolcd_data *data)
+{
+ struct hid_report *report;
+ unsigned long flags;
+
+ if (!data->led[0])
+ return;
+ report = picolcd_out_report(REPORT_LED_STATE, data->hdev);
+ if (!report || report->maxfield != 1 || report->field[0]->report_count != 1)
+ return;
+
+ spin_lock_irqsave(&data->lock, flags);
+ hid_set_field(report->field[0], 0, data->led_state);
+ if (!(data->status & PICOLCD_FAILED))
+ hid_hw_request(data->hdev, report, HID_REQ_SET_REPORT);
+ spin_unlock_irqrestore(&data->lock, flags);
+}
+
+static void picolcd_led_set_brightness(struct led_classdev *led_cdev,
+ enum led_brightness value)
+{
+ struct device *dev;
+ struct hid_device *hdev;
+ struct picolcd_data *data;
+ int i, state = 0;
+
+ dev = led_cdev->dev->parent;
+ hdev = container_of(dev, struct hid_device, dev);
+ data = hid_get_drvdata(hdev);
+ if (!data)
+ return;
+ for (i = 0; i < 8; i++) {
+ if (led_cdev != data->led[i])
+ continue;
+ state = (data->led_state >> i) & 1;
+ if (value == LED_OFF && state) {
+ data->led_state &= ~(1 << i);
+ picolcd_leds_set(data);
+ } else if (value != LED_OFF && !state) {
+ data->led_state |= 1 << i;
+ picolcd_leds_set(data);
+ }
+ break;
+ }
+}
+
+static enum led_brightness picolcd_led_get_brightness(struct led_classdev *led_cdev)
+{
+ struct device *dev;
+ struct hid_device *hdev;
+ struct picolcd_data *data;
+ int i, value = 0;
+
+ dev = led_cdev->dev->parent;
+ hdev = container_of(dev, struct hid_device, dev);
+ data = hid_get_drvdata(hdev);
+ for (i = 0; i < 8; i++)
+ if (led_cdev == data->led[i]) {
+ value = (data->led_state >> i) & 1;
+ break;
+ }
+ return value ? LED_FULL : LED_OFF;
+}
+
+int picolcd_init_leds(struct picolcd_data *data, struct hid_report *report)
+{
+ struct device *dev = &data->hdev->dev;
+ struct led_classdev *led;
+ size_t name_sz = strlen(dev_name(dev)) + 8;
+ char *name;
+ int i, ret = 0;
+
+ if (!report)
+ return -ENODEV;
+ if (report->maxfield != 1 || report->field[0]->report_count != 1 ||
+ report->field[0]->report_size != 8) {
+ dev_err(dev, "unsupported LED_STATE report");
+ return -EINVAL;
+ }
+
+ for (i = 0; i < 8; i++) {
+ led = kzalloc(sizeof(struct led_classdev)+name_sz, GFP_KERNEL);
+ if (!led) {
+ dev_err(dev, "can't allocate memory for LED %d\n", i);
+ ret = -ENOMEM;
+ goto err;
+ }
+ name = (void *)(&led[1]);
+ snprintf(name, name_sz, "%s::GPO%d", dev_name(dev), i);
+ led->name = name;
+ led->brightness = 0;
+ led->max_brightness = 1;
+ led->brightness_get = picolcd_led_get_brightness;
+ led->brightness_set = picolcd_led_set_brightness;
+
+ data->led[i] = led;
+ ret = led_classdev_register(dev, data->led[i]);
+ if (ret) {
+ data->led[i] = NULL;
+ kfree(led);
+ dev_err(dev, "can't register LED %d\n", i);
+ goto err;
+ }
+ }
+ return 0;
+err:
+ for (i = 0; i < 8; i++)
+ if (data->led[i]) {
+ led = data->led[i];
+ data->led[i] = NULL;
+ led_classdev_unregister(led);
+ kfree(led);
+ }
+ return ret;
+}
+
+void picolcd_exit_leds(struct picolcd_data *data)
+{
+ struct led_classdev *led;
+ int i;
+
+ for (i = 0; i < 8; i++) {
+ led = data->led[i];
+ data->led[i] = NULL;
+ if (!led)
+ continue;
+ led_classdev_unregister(led);
+ kfree(led);
+ }
+}
+
+
Code Review / kvmfornfv.git / blobdiff