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1// SPDX-License-Identifier: GPL-2.0-only2/***************************************************************************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 values52 * 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 + base55 * interval for non-first report of IR data - thus the quirk below56 * to get RC_CODE to understand Sony and JVC remotes I have at hand57 */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}138 139