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 33 int 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 = US_TO_NS(rawir.pulse ? (65536 - w) : w); 63 /* Quirk!! - see above */ 64 if (i == 0 && rawir.duration > 15000000) 65 rawir.duration -= 15000000; 66 ir_raw_event_store(data->rc_dev, &rawir); 67 } 68 ir_raw_event_handle(data->rc_dev); 69 70 return 1; 71 } 72 73 static 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 84 static 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 */ 95 int 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_NS(100); 118 rdev->rx_resolution = US_TO_NS(1); 119 120 ret = rc_register_device(rdev); 121 if (ret) 122 goto err; 123 data->rc_dev = rdev; 124 return 0; 125 126 err: 127 rc_free_device(rdev); 128 return ret; 129 } 130 131 void 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