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// SPDX-License-Identifier: GPL-2.0-only
/***************************************************************************
* 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> *
* *
***************************************************************************/
#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 <media/rc-core.h>
#include "hid-picolcd.h"
int picolcd_raw_cir(struct picolcd_data *data,
struct hid_report *report, u8 *raw_data, int size)
{
unsigned long flags;
int i, w, sz;
struct ir_raw_event rawir = {};
/* ignore if rc_dev is NULL or status is shunned */
spin_lock_irqsave(&data->lock, flags);
if (!data->rc_dev || (data->status & PICOLCD_CIR_SHUN)) {
spin_unlock_irqrestore(&data->lock, flags);
return 1;
}
spin_unlock_irqrestore(&data->lock, flags);
/* PicoLCD USB packets contain 16-bit intervals in network order,
* with value negated for pulse. Intervals are in microseconds.
*
* Note: some userspace LIRC code for PicoLCD says negated values
* for space - is it a matter of IR chip? (pulse for my TSOP2236)
*
* In addition, the first interval seems to be around 15000 + base
* interval for non-first report of IR data - thus the quirk below
* to get RC_CODE to understand Sony and JVC remotes I have at hand
*/
sz = size > 0 ? min((int)raw_data[0], size-1) : 0;
for (i = 0; i+1 < sz; i += 2) {
w = (raw_data[i] << 8) | (raw_data[i+1]);
rawir.pulse = !!(w & 0x8000);
rawir.duration = rawir.pulse ? (65536 - w) : w;
/* Quirk!! - see above */
if (i == 0 && rawir.duration > 15000)
rawir.duration -= 15000;
ir_raw_event_store(data->rc_dev, &rawir);
}
ir_raw_event_handle(data->rc_dev);
return 1;
}
static int picolcd_cir_open(struct rc_dev *dev)
{
struct picolcd_data *data = dev->priv;
unsigned long flags;
spin_lock_irqsave(&data->lock, flags);
data->status &= ~PICOLCD_CIR_SHUN;
spin_unlock_irqrestore(&data->lock, flags);
return 0;
}
static void picolcd_cir_close(struct rc_dev *dev)
{
struct picolcd_data *data = dev->priv;
unsigned long flags;
spin_lock_irqsave(&data->lock, flags);
data->status |= PICOLCD_CIR_SHUN;
spin_unlock_irqrestore(&data->lock, flags);
}
/* initialize CIR input device */
int picolcd_init_cir(struct picolcd_data *data, struct hid_report *report)
{
struct rc_dev *rdev;
int ret = 0;
rdev = rc_allocate_device(RC_DRIVER_IR_RAW);
if (!rdev)
return -ENOMEM;
rdev->priv = data;
rdev->allowed_protocols = RC_PROTO_BIT_ALL_IR_DECODER;
rdev->open = picolcd_cir_open;
rdev->close = picolcd_cir_close;
rdev->device_name = data->hdev->name;
rdev->input_phys = data->hdev->phys;
rdev->input_id.bustype = data->hdev->bus;
rdev->input_id.vendor = data->hdev->vendor;
rdev->input_id.product = data->hdev->product;
rdev->input_id.version = data->hdev->version;
rdev->dev.parent = &data->hdev->dev;
rdev->driver_name = PICOLCD_NAME;
rdev->map_name = RC_MAP_RC6_MCE;
rdev->timeout = MS_TO_US(100);
rdev->rx_resolution = 1;
ret = rc_register_device(rdev);
if (ret)
goto err;
data->rc_dev = rdev;
return 0;
err:
rc_free_device(rdev);
return ret;
}
void picolcd_exit_cir(struct picolcd_data *data)
{
struct rc_dev *rdev = data->rc_dev;
data->rc_dev = NULL;
rc_unregister_device(rdev);
}
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