cregit-Linux how code gets into the kernel

Release 4.7 drivers/hid/hid-picolcd_leds.c

Directory: drivers/hid
/***************************************************************************
 *   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); }

Contributors

PersonTokensPropCommitsCommitProp
bruno premontbruno premont12098.36%266.67%
benjamin tissoiresbenjamin tissoires21.64%133.33%
Total122100.00%3100.00%


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 = to_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; } }

Contributors

PersonTokensPropCommitsCommitProp
bruno premontbruno premont15599.36%266.67%
geliang tanggeliang tang10.64%133.33%
Total156100.00%3100.00%


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 = to_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; }

Contributors

PersonTokensPropCommitsCommitProp
bruno premontbruno premont10199.02%150.00%
geliang tanggeliang tang10.98%150.00%
Total102100.00%2100.00%


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; }

Contributors

PersonTokensPropCommitsCommitProp
bruno premontbruno premont337100.00%1100.00%
Total337100.00%1100.00%


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); } }

Contributors

PersonTokensPropCommitsCommitProp
bruno premontbruno premont67100.00%1100.00%
Total67100.00%1100.00%


Overall Contributors

PersonTokensPropCommitsCommitProp
bruno premontbruno premont82699.52%360.00%
geliang tanggeliang tang20.24%120.00%
benjamin tissoiresbenjamin tissoires20.24%120.00%
Total830100.00%5100.00%
Directory: drivers/hid
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