linux/drivers/hid/hid-picolcd_cir.c
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   1/***************************************************************************
   2 *   Copyright (C) 2010-2012 by Bruno Prémont <bonbons@linux-vserver.org>  *
   3 *                                                                         *
   4 *   Based on Logitech G13 driver (v0.4)                                   *
   5 *     Copyright (C) 2009 by Rick L. Vinyard, Jr. <rvinyard@cs.nmsu.edu>   *
   6 *                                                                         *
   7 *   This program is free software: you can redistribute it and/or modify  *
   8 *   it under the terms of the GNU General Public License as published by  *
   9 *   the Free Software Foundation, version 2 of the License.               *
  10 *                                                                         *
  11 *   This driver is distributed in the hope that it will be useful, but    *
  12 *   WITHOUT ANY WARRANTY; without even the implied warranty of            *
  13 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU      *
  14 *   General Public License for more details.                              *
  15 *                                                                         *
  16 *   You should have received a copy of the GNU General Public License     *
  17 *   along with this software. If not see <http://www.gnu.org/licenses/>.  *
  18 ***************************************************************************/
  19
  20#include <linux/hid.h>
  21#include <linux/hid-debug.h>
  22#include <linux/input.h>
  23#include "hid-ids.h"
  24#include "usbhid/usbhid.h"
  25#include <linux/usb.h>
  26
  27#include <linux/fb.h>
  28#include <linux/vmalloc.h>
  29#include <linux/backlight.h>
  30#include <linux/lcd.h>
  31
  32#include <linux/leds.h>
  33
  34#include <linux/seq_file.h>
  35#include <linux/debugfs.h>
  36
  37#include <linux/completion.h>
  38#include <linux/uaccess.h>
  39#include <linux/module.h>
  40#include <media/rc-core.h>
  41
  42#include "hid-picolcd.h"
  43
  44
  45int picolcd_raw_cir(struct picolcd_data *data,
  46                struct hid_report *report, u8 *raw_data, int size)
  47{
  48        unsigned long flags;
  49        int i, w, sz;
  50        DEFINE_IR_RAW_EVENT(rawir);
  51
  52        /* ignore if rc_dev is NULL or status is shunned */
  53        spin_lock_irqsave(&data->lock, flags);
  54        if (!data->rc_dev || (data->status & PICOLCD_CIR_SHUN)) {
  55                spin_unlock_irqrestore(&data->lock, flags);
  56                return 1;
  57        }
  58        spin_unlock_irqrestore(&data->lock, flags);
  59
  60        /* PicoLCD USB packets contain 16-bit intervals in network order,
  61         * with value negated for pulse. Intervals are in microseconds.
  62         *
  63         * Note: some userspace LIRC code for PicoLCD says negated values
  64         * for space - is it a matter of IR chip? (pulse for my TSOP2236)
  65         *
  66         * In addition, the first interval seems to be around 15000 + base
  67         * interval for non-first report of IR data - thus the quirk below
  68         * to get RC_CODE to understand Sony and JVC remotes I have at hand
  69         */
  70        sz = size > 0 ? min((int)raw_data[0], size-1) : 0;
  71        for (i = 0; i+1 < sz; i += 2) {
  72                init_ir_raw_event(&rawir);
  73                w = (raw_data[i] << 8) | (raw_data[i+1]);
  74                rawir.pulse = !!(w & 0x8000);
  75                rawir.duration = US_TO_NS(rawir.pulse ? (65536 - w) : w);
  76                /* Quirk!! - see above */
  77                if (i == 0 && rawir.duration > 15000000)
  78                        rawir.duration -= 15000000;
  79                ir_raw_event_store(data->rc_dev, &rawir);
  80        }
  81        ir_raw_event_handle(data->rc_dev);
  82
  83        return 1;
  84}
  85
  86static int picolcd_cir_open(struct rc_dev *dev)
  87{
  88        struct picolcd_data *data = dev->priv;
  89        unsigned long flags;
  90
  91        spin_lock_irqsave(&data->lock, flags);
  92        data->status &= ~PICOLCD_CIR_SHUN;
  93        spin_unlock_irqrestore(&data->lock, flags);
  94        return 0;
  95}
  96
  97static void picolcd_cir_close(struct rc_dev *dev)
  98{
  99        struct picolcd_data *data = dev->priv;
 100        unsigned long flags;
 101
 102        spin_lock_irqsave(&data->lock, flags);
 103        data->status |= PICOLCD_CIR_SHUN;
 104        spin_unlock_irqrestore(&data->lock, flags);
 105}
 106
 107/* initialize CIR input device */
 108int picolcd_init_cir(struct picolcd_data *data, struct hid_report *report)
 109{
 110        struct rc_dev *rdev;
 111        int ret = 0;
 112
 113        rdev = rc_allocate_device();
 114        if (!rdev)
 115                return -ENOMEM;
 116
 117        rdev->priv             = data;
 118        rdev->driver_type      = RC_DRIVER_IR_RAW;
 119        rdev->allowed_protos   = RC_BIT_ALL;
 120        rdev->open             = picolcd_cir_open;
 121        rdev->close            = picolcd_cir_close;
 122        rdev->input_name       = data->hdev->name;
 123        rdev->input_phys       = data->hdev->phys;
 124        rdev->input_id.bustype = data->hdev->bus;
 125        rdev->input_id.vendor  = data->hdev->vendor;
 126        rdev->input_id.product = data->hdev->product;
 127        rdev->input_id.version = data->hdev->version;
 128        rdev->dev.parent       = &data->hdev->dev;
 129        rdev->driver_name      = PICOLCD_NAME;
 130        rdev->map_name         = RC_MAP_RC6_MCE;
 131        rdev->timeout          = MS_TO_NS(100);
 132        rdev->rx_resolution    = US_TO_NS(1);
 133
 134        ret = rc_register_device(rdev);
 135        if (ret)
 136                goto err;
 137        data->rc_dev = rdev;
 138        return 0;
 139
 140err:
 141        rc_free_device(rdev);
 142        return ret;
 143}
 144
 145void picolcd_exit_cir(struct picolcd_data *data)
 146{
 147        struct rc_dev *rdev = data->rc_dev;
 148
 149        data->rc_dev = NULL;
 150        rc_unregister_device(rdev);
 151}
 152
 153
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