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 25 #include <linux/fb.h> 26 #include <linux/vmalloc.h> 27 #include <linux/backlight.h> 28 #include <linux/lcd.h> 29 30 #include <linux/leds.h> 31 32 #include <linux/seq_file.h> 33 #include <linux/debugfs.h> 34 35 #include <linux/completion.h> 36 #include <linux/uaccess.h> 37 #include <linux/module.h> 38 #include <media/rc-core.h> 39 40 #include "hid-picolcd.h" 41 42 43 int picolcd_raw_cir(struct picolcd_data *data, 44 struct hid_report *report, u8 *raw_data, int size) 45 { 46 unsigned long flags; 47 int i, w, sz; 48 DEFINE_IR_RAW_EVENT(rawir); 49 50 /* ignore if rc_dev is NULL or status is shunned */ 51 spin_lock_irqsave(&data->lock, flags); 52 if (!data->rc_dev || (data->status & PICOLCD_CIR_SHUN)) { 53 spin_unlock_irqrestore(&data->lock, flags); 54 return 1; 55 } 56 spin_unlock_irqrestore(&data->lock, flags); 57 58 /* PicoLCD USB packets contain 16-bit intervals in network order, 59 * with value negated for pulse. Intervals are in microseconds. 60 * 61 * Note: some userspace LIRC code for PicoLCD says negated values 62 * for space - is it a matter of IR chip? (pulse for my TSOP2236) 63 * 64 * In addition, the first interval seems to be around 15000 + base 65 * interval for non-first report of IR data - thus the quirk below 66 * to get RC_CODE to understand Sony and JVC remotes I have at hand 67 */ 68 sz = size > 0 ? min((int)raw_data[0], size-1) : 0; 69 for (i = 0; i+1 < sz; i += 2) { 70 init_ir_raw_event(&rawir); 71 w = (raw_data[i] << 8) | (raw_data[i+1]); 72 rawir.pulse = !!(w & 0x8000); 73 rawir.duration = US_TO_NS(rawir.pulse ? (65536 - w) : w); 74 /* Quirk!! - see above */ 75 if (i == 0 && rawir.duration > 15000000) 76 rawir.duration -= 15000000; 77 ir_raw_event_store(data->rc_dev, &rawir); 78 } 79 ir_raw_event_handle(data->rc_dev); 80 81 return 1; 82 } 83 84 static int picolcd_cir_open(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 return 0; 93 } 94 95 static void picolcd_cir_close(struct rc_dev *dev) 96 { 97 struct picolcd_data *data = dev->priv; 98 unsigned long flags; 99 100 spin_lock_irqsave(&data->lock, flags); 101 data->status |= PICOLCD_CIR_SHUN; 102 spin_unlock_irqrestore(&data->lock, flags); 103 } 104 105 /* initialize CIR input device */ 106 int picolcd_init_cir(struct picolcd_data *data, struct hid_report *report) 107 { 108 struct rc_dev *rdev; 109 int ret = 0; 110 111 rdev = rc_allocate_device(RC_DRIVER_IR_RAW); 112 if (!rdev) 113 return -ENOMEM; 114 115 rdev->priv = data; 116 rdev->allowed_protocols = RC_BIT_ALL_IR_DECODER; 117 rdev->open = picolcd_cir_open; 118 rdev->close = picolcd_cir_close; 119 rdev->input_name = data->hdev->name; 120 rdev->input_phys = data->hdev->phys; 121 rdev->input_id.bustype = data->hdev->bus; 122 rdev->input_id.vendor = data->hdev->vendor; 123 rdev->input_id.product = data->hdev->product; 124 rdev->input_id.version = data->hdev->version; 125 rdev->dev.parent = &data->hdev->dev; 126 rdev->driver_name = PICOLCD_NAME; 127 rdev->map_name = RC_MAP_RC6_MCE; 128 rdev->timeout = MS_TO_NS(100); 129 rdev->rx_resolution = US_TO_NS(1); 130 131 ret = rc_register_device(rdev); 132 if (ret) 133 goto err; 134 data->rc_dev = rdev; 135 return 0; 136 137 err: 138 rc_free_device(rdev); 139 return ret; 140 } 141 142 void picolcd_exit_cir(struct picolcd_data *data) 143 { 144 struct rc_dev *rdev = data->rc_dev; 145 146 data->rc_dev = NULL; 147 rc_unregister_device(rdev); 148 } 149 150