1// SPDX-License-Identifier: GPL-2.0-only
  2/***************************************************************************
  3 *   Copyright (C) 2010-2012 by Bruno Prémont <bonbons@linux-vserver.org>  *
  4 *                                                                         *
  5 *   Based on Logitech G13 driver (v0.4)                                   *
  6 *     Copyright (C) 2009 by Rick L. Vinyard, Jr. <rvinyard@cs.nmsu.edu>   *
  7 *                                                                         *
  8 ***************************************************************************/
  9
 10#include <linux/hid.h>
 11#include <linux/hid-debug.h>
 12#include <linux/input.h>
 13#include "hid-ids.h"
 14
 15#include <linux/fb.h>
 16#include <linux/vmalloc.h>
 17#include <linux/backlight.h>
 18#include <linux/lcd.h>
 19
 20#include <linux/leds.h>
 21
 22#include <linux/seq_file.h>
 23#include <linux/debugfs.h>
 24
 25#include <linux/completion.h>
 26#include <linux/uaccess.h>
 27#include <linux/module.h>
 28#include <media/rc-core.h>
 29
 30#include "hid-picolcd.h"
 31
 32
 33int picolcd_raw_cir(struct picolcd_data *data,
 34		struct hid_report *report, u8 *raw_data, int size)
 35{
 36	unsigned long flags;
 37	int i, w, sz;
 38	struct ir_raw_event rawir = {};
 39
 40	/* ignore if rc_dev is NULL or status is shunned */
 41	spin_lock_irqsave(&data->lock, flags);
 42	if (!data->rc_dev || (data->status & PICOLCD_CIR_SHUN)) {
 43		spin_unlock_irqrestore(&data->lock, flags);
 44		return 1;
 45	}
 46	spin_unlock_irqrestore(&data->lock, flags);
 47
 48	/* PicoLCD USB packets contain 16-bit intervals in network order,
 49	 * with value negated for pulse. Intervals are in microseconds.
 50	 *
 51	 * Note: some userspace LIRC code for PicoLCD says negated values
 52	 * for space - is it a matter of IR chip? (pulse for my TSOP2236)
 53	 *
 54	 * In addition, the first interval seems to be around 15000 + base
 55	 * interval for non-first report of IR data - thus the quirk below
 56	 * to get RC_CODE to understand Sony and JVC remotes I have at hand
 57	 */
 58	sz = size > 0 ? min((int)raw_data[0], size-1) : 0;
 59	for (i = 0; i+1 < sz; i += 2) {
 60		w = (raw_data[i] << 8) | (raw_data[i+1]);
 61		rawir.pulse = !!(w & 0x8000);
 62		rawir.duration = rawir.pulse ? (65536 - w) : w;
 63		/* Quirk!! - see above */
 64		if (i == 0 && rawir.duration > 15000)
 65			rawir.duration -= 15000;
 66		ir_raw_event_store(data->rc_dev, &rawir);
 67	}
 68	ir_raw_event_handle(data->rc_dev);
 69
 70	return 1;
 71}
 72
 73static int picolcd_cir_open(struct rc_dev *dev)
 74{
 75	struct picolcd_data *data = dev->priv;
 76	unsigned long flags;
 77
 78	spin_lock_irqsave(&data->lock, flags);
 79	data->status &= ~PICOLCD_CIR_SHUN;
 80	spin_unlock_irqrestore(&data->lock, flags);
 81	return 0;
 82}
 83
 84static void picolcd_cir_close(struct rc_dev *dev)
 85{
 86	struct picolcd_data *data = dev->priv;
 87	unsigned long flags;
 88
 89	spin_lock_irqsave(&data->lock, flags);
 90	data->status |= PICOLCD_CIR_SHUN;
 91	spin_unlock_irqrestore(&data->lock, flags);
 92}
 93
 94/* initialize CIR input device */
 95int picolcd_init_cir(struct picolcd_data *data, struct hid_report *report)
 96{
 97	struct rc_dev *rdev;
 98	int ret = 0;
 99
100	rdev = rc_allocate_device(RC_DRIVER_IR_RAW);
101	if (!rdev)
102		return -ENOMEM;
103
104	rdev->priv             = data;
105	rdev->allowed_protocols = RC_PROTO_BIT_ALL_IR_DECODER;
106	rdev->open             = picolcd_cir_open;
107	rdev->close            = picolcd_cir_close;
108	rdev->device_name      = data->hdev->name;
109	rdev->input_phys       = data->hdev->phys;
110	rdev->input_id.bustype = data->hdev->bus;
111	rdev->input_id.vendor  = data->hdev->vendor;
112	rdev->input_id.product = data->hdev->product;
113	rdev->input_id.version = data->hdev->version;
114	rdev->dev.parent       = &data->hdev->dev;
115	rdev->driver_name      = PICOLCD_NAME;
116	rdev->map_name         = RC_MAP_RC6_MCE;
117	rdev->timeout          = MS_TO_US(100);
118	rdev->rx_resolution    = 1;
119
120	ret = rc_register_device(rdev);
121	if (ret)
122		goto err;
123	data->rc_dev = rdev;
124	return 0;
125
126err:
127	rc_free_device(rdev);
128	return ret;
129}
130
131void picolcd_exit_cir(struct picolcd_data *data)
132{
133	struct rc_dev *rdev = data->rc_dev;
134
135	data->rc_dev = NULL;
136	rc_unregister_device(rdev);
137}
138