Thomas Gleixner | c942fdd | 2019-05-27 08:55:06 +0200 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
Jarod Wilson | 4a62a5a | 2010-07-03 01:06:57 -0300 | [diff] [blame] | 2 | /* |
| 3 | * LIRC base driver |
| 4 | * |
| 5 | * by Artur Lipowski <alipowski@interia.pl> |
Jarod Wilson | 4a62a5a | 2010-07-03 01:06:57 -0300 | [diff] [blame] | 6 | */ |
| 7 | |
Andi Shyti | 3fac031 | 2016-07-06 06:01:16 -0300 | [diff] [blame] | 8 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| 9 | |
Jarod Wilson | 4a62a5a | 2010-07-03 01:06:57 -0300 | [diff] [blame] | 10 | #include <linux/module.h> |
Jarod Wilson | 4a62a5a | 2010-07-03 01:06:57 -0300 | [diff] [blame] | 11 | #include <linux/mutex.h> |
Jarod Wilson | 4a62a5a | 2010-07-03 01:06:57 -0300 | [diff] [blame] | 12 | #include <linux/device.h> |
Sean Young | f4364dc | 2018-05-27 12:24:09 +0100 | [diff] [blame] | 13 | #include <linux/file.h> |
David Härdeman | 46c8f47 | 2017-06-25 09:32:05 -0300 | [diff] [blame] | 14 | #include <linux/idr.h> |
Sean Young | a6ddd4f | 2017-09-26 09:34:47 -0400 | [diff] [blame] | 15 | #include <linux/poll.h> |
Sean Young | 42e0442 | 2017-11-02 16:39:16 -0400 | [diff] [blame] | 16 | #include <linux/sched.h> |
| 17 | #include <linux/wait.h> |
Jarod Wilson | 4a62a5a | 2010-07-03 01:06:57 -0300 | [diff] [blame] | 18 | |
Sean Young | a60d64b | 2017-09-23 10:41:13 -0400 | [diff] [blame] | 19 | #include "rc-core-priv.h" |
Sean Young | aefb5e3 | 2017-11-02 16:44:21 -0400 | [diff] [blame] | 20 | #include <uapi/linux/lirc.h> |
Jarod Wilson | 4a62a5a | 2010-07-03 01:06:57 -0300 | [diff] [blame] | 21 | |
Sean Young | 5c4c8b4 | 2019-06-13 04:49:26 -0400 | [diff] [blame] | 22 | #define LIRCBUF_SIZE 1024 |
Jarod Wilson | 4a62a5a | 2010-07-03 01:06:57 -0300 | [diff] [blame] | 23 | |
| 24 | static dev_t lirc_base_dev; |
| 25 | |
David Härdeman | 46c8f47 | 2017-06-25 09:32:05 -0300 | [diff] [blame] | 26 | /* Used to keep track of allocated lirc devices */ |
David Härdeman | 46c8f47 | 2017-06-25 09:32:05 -0300 | [diff] [blame] | 27 | static DEFINE_IDA(lirc_ida); |
Jarod Wilson | 4a62a5a | 2010-07-03 01:06:57 -0300 | [diff] [blame] | 28 | |
| 29 | /* Only used for sysfs but defined to void otherwise */ |
| 30 | static struct class *lirc_class; |
| 31 | |
Sean Young | 42e0442 | 2017-11-02 16:39:16 -0400 | [diff] [blame] | 32 | /** |
Sean Young | 75992a4 | 2020-08-24 21:10:45 +0200 | [diff] [blame] | 33 | * lirc_raw_event() - Send raw IR data to lirc to be relayed to userspace |
Sean Young | 42e0442 | 2017-11-02 16:39:16 -0400 | [diff] [blame] | 34 | * |
| 35 | * @dev: the struct rc_dev descriptor of the device |
| 36 | * @ev: the struct ir_raw_event descriptor of the pulse/space |
| 37 | */ |
Sean Young | 75992a4 | 2020-08-24 21:10:45 +0200 | [diff] [blame] | 38 | void lirc_raw_event(struct rc_dev *dev, struct ir_raw_event ev) |
Jarod Wilson | 4a62a5a | 2010-07-03 01:06:57 -0300 | [diff] [blame] | 39 | { |
Sean Young | 7e45d66 | 2017-11-02 17:21:13 -0400 | [diff] [blame] | 40 | unsigned long flags; |
| 41 | struct lirc_fh *fh; |
Sean Young | 42e0442 | 2017-11-02 16:39:16 -0400 | [diff] [blame] | 42 | int sample; |
Sean Young | a607f51 | 2017-08-04 10:12:03 -0400 | [diff] [blame] | 43 | |
Sean Young | 42e0442 | 2017-11-02 16:39:16 -0400 | [diff] [blame] | 44 | /* Packet start */ |
| 45 | if (ev.reset) { |
| 46 | /* |
| 47 | * Userspace expects a long space event before the start of |
| 48 | * the signal to use as a sync. This may be done with repeat |
| 49 | * packets and normal samples. But if a reset has been sent |
| 50 | * then we assume that a long time has passed, so we send a |
| 51 | * space with the maximum time value. |
| 52 | */ |
| 53 | sample = LIRC_SPACE(LIRC_VALUE_MASK); |
Sean Young | 1f17f68 | 2018-02-12 07:27:50 -0500 | [diff] [blame] | 54 | dev_dbg(&dev->dev, "delivering reset sync space to lirc_dev\n"); |
David Härdeman | b15e393 | 2017-06-25 09:32:36 -0300 | [diff] [blame] | 55 | |
Sean Young | 42e0442 | 2017-11-02 16:39:16 -0400 | [diff] [blame] | 56 | /* Carrier reports */ |
| 57 | } else if (ev.carrier_report) { |
| 58 | sample = LIRC_FREQUENCY(ev.carrier); |
Sean Young | 1f17f68 | 2018-02-12 07:27:50 -0500 | [diff] [blame] | 59 | dev_dbg(&dev->dev, "carrier report (freq: %d)\n", sample); |
Sean Young | 42e0442 | 2017-11-02 16:39:16 -0400 | [diff] [blame] | 60 | |
| 61 | /* Packet end */ |
| 62 | } else if (ev.timeout) { |
| 63 | if (dev->gap) |
| 64 | return; |
| 65 | |
| 66 | dev->gap_start = ktime_get(); |
| 67 | dev->gap = true; |
| 68 | dev->gap_duration = ev.duration; |
| 69 | |
Sean Young | 528222d8 | 2020-08-23 19:23:05 +0200 | [diff] [blame] | 70 | sample = LIRC_TIMEOUT(ev.duration); |
Sean Young | 1f17f68 | 2018-02-12 07:27:50 -0500 | [diff] [blame] | 71 | dev_dbg(&dev->dev, "timeout report (duration: %d)\n", sample); |
Sean Young | 42e0442 | 2017-11-02 16:39:16 -0400 | [diff] [blame] | 72 | |
| 73 | /* Normal sample */ |
| 74 | } else { |
| 75 | if (dev->gap) { |
Sean Young | 528222d8 | 2020-08-23 19:23:05 +0200 | [diff] [blame] | 76 | dev->gap_duration += ktime_to_us(ktime_sub(ktime_get(), |
Sean Young | 42e0442 | 2017-11-02 16:39:16 -0400 | [diff] [blame] | 77 | dev->gap_start)); |
| 78 | |
Sean Young | 528222d8 | 2020-08-23 19:23:05 +0200 | [diff] [blame] | 79 | /* Cap by LIRC_VALUE_MASK */ |
Sean Young | 42e0442 | 2017-11-02 16:39:16 -0400 | [diff] [blame] | 80 | dev->gap_duration = min_t(u64, dev->gap_duration, |
| 81 | LIRC_VALUE_MASK); |
| 82 | |
Sean Young | 7e45d66 | 2017-11-02 17:21:13 -0400 | [diff] [blame] | 83 | spin_lock_irqsave(&dev->lirc_fh_lock, flags); |
| 84 | list_for_each_entry(fh, &dev->lirc_fh, list) |
| 85 | kfifo_put(&fh->rawir, |
| 86 | LIRC_SPACE(dev->gap_duration)); |
| 87 | spin_unlock_irqrestore(&dev->lirc_fh_lock, flags); |
Sean Young | 42e0442 | 2017-11-02 16:39:16 -0400 | [diff] [blame] | 88 | dev->gap = false; |
| 89 | } |
| 90 | |
Sean Young | 528222d8 | 2020-08-23 19:23:05 +0200 | [diff] [blame] | 91 | sample = ev.pulse ? LIRC_PULSE(ev.duration) : |
| 92 | LIRC_SPACE(ev.duration); |
Sean Young | 1f17f68 | 2018-02-12 07:27:50 -0500 | [diff] [blame] | 93 | dev_dbg(&dev->dev, "delivering %uus %s to lirc_dev\n", |
Sean Young | 528222d8 | 2020-08-23 19:23:05 +0200 | [diff] [blame] | 94 | ev.duration, TO_STR(ev.pulse)); |
Jarod Wilson | 4a62a5a | 2010-07-03 01:06:57 -0300 | [diff] [blame] | 95 | } |
Sean Young | 42e0442 | 2017-11-02 16:39:16 -0400 | [diff] [blame] | 96 | |
Sean Young | f4364dc | 2018-05-27 12:24:09 +0100 | [diff] [blame] | 97 | /* |
| 98 | * bpf does not care about the gap generated above; that exists |
| 99 | * for backwards compatibility |
| 100 | */ |
| 101 | lirc_bpf_run(dev, sample); |
| 102 | |
Sean Young | 7e45d66 | 2017-11-02 17:21:13 -0400 | [diff] [blame] | 103 | spin_lock_irqsave(&dev->lirc_fh_lock, flags); |
| 104 | list_for_each_entry(fh, &dev->lirc_fh, list) { |
| 105 | if (LIRC_IS_TIMEOUT(sample) && !fh->send_timeout_reports) |
| 106 | continue; |
| 107 | if (kfifo_put(&fh->rawir, sample)) |
Linus Torvalds | a9a0884 | 2018-02-11 14:34:03 -0800 | [diff] [blame] | 108 | wake_up_poll(&fh->wait_poll, EPOLLIN | EPOLLRDNORM); |
Sean Young | 7e45d66 | 2017-11-02 17:21:13 -0400 | [diff] [blame] | 109 | } |
| 110 | spin_unlock_irqrestore(&dev->lirc_fh_lock, flags); |
David Härdeman | 3381b77 | 2017-06-30 05:41:57 -0300 | [diff] [blame] | 111 | } |
| 112 | |
Sean Young | 42e0442 | 2017-11-02 16:39:16 -0400 | [diff] [blame] | 113 | /** |
Sean Young | 75992a4 | 2020-08-24 21:10:45 +0200 | [diff] [blame] | 114 | * lirc_scancode_event() - Send scancode data to lirc to be relayed to |
Sean Young | 7e45d66 | 2017-11-02 17:21:13 -0400 | [diff] [blame] | 115 | * userspace. This can be called in atomic context. |
Sean Young | 42e0442 | 2017-11-02 16:39:16 -0400 | [diff] [blame] | 116 | * @dev: the struct rc_dev descriptor of the device |
| 117 | * @lsc: the struct lirc_scancode describing the decoded scancode |
| 118 | */ |
Sean Young | 75992a4 | 2020-08-24 21:10:45 +0200 | [diff] [blame] | 119 | void lirc_scancode_event(struct rc_dev *dev, struct lirc_scancode *lsc) |
David Härdeman | 3381b77 | 2017-06-30 05:41:57 -0300 | [diff] [blame] | 120 | { |
Sean Young | 7e45d66 | 2017-11-02 17:21:13 -0400 | [diff] [blame] | 121 | unsigned long flags; |
| 122 | struct lirc_fh *fh; |
Sean Young | 74c839b | 2017-01-30 13:49:58 -0200 | [diff] [blame] | 123 | |
Sean Young | 42e0442 | 2017-11-02 16:39:16 -0400 | [diff] [blame] | 124 | lsc->timestamp = ktime_get_ns(); |
| 125 | |
Sean Young | 7e45d66 | 2017-11-02 17:21:13 -0400 | [diff] [blame] | 126 | spin_lock_irqsave(&dev->lirc_fh_lock, flags); |
| 127 | list_for_each_entry(fh, &dev->lirc_fh, list) { |
| 128 | if (kfifo_put(&fh->scancodes, *lsc)) |
Linus Torvalds | a9a0884 | 2018-02-11 14:34:03 -0800 | [diff] [blame] | 129 | wake_up_poll(&fh->wait_poll, EPOLLIN | EPOLLRDNORM); |
Andi Shyti | 6fa99e1 | 2016-07-06 06:01:13 -0300 | [diff] [blame] | 130 | } |
Sean Young | 7e45d66 | 2017-11-02 17:21:13 -0400 | [diff] [blame] | 131 | spin_unlock_irqrestore(&dev->lirc_fh_lock, flags); |
Andi Shyti | 6fa99e1 | 2016-07-06 06:01:13 -0300 | [diff] [blame] | 132 | } |
Sean Young | 75992a4 | 2020-08-24 21:10:45 +0200 | [diff] [blame] | 133 | EXPORT_SYMBOL_GPL(lirc_scancode_event); |
Andi Shyti | 6fa99e1 | 2016-07-06 06:01:13 -0300 | [diff] [blame] | 134 | |
Sean Young | 75992a4 | 2020-08-24 21:10:45 +0200 | [diff] [blame] | 135 | static int lirc_open(struct inode *inode, struct file *file) |
David Härdeman | 6ecccc3 | 2017-06-25 09:32:15 -0300 | [diff] [blame] | 136 | { |
Sean Young | 42e0442 | 2017-11-02 16:39:16 -0400 | [diff] [blame] | 137 | struct rc_dev *dev = container_of(inode->i_cdev, struct rc_dev, |
| 138 | lirc_cdev); |
Sean Young | 7e45d66 | 2017-11-02 17:21:13 -0400 | [diff] [blame] | 139 | struct lirc_fh *fh = kzalloc(sizeof(*fh), GFP_KERNEL); |
| 140 | unsigned long flags; |
David Härdeman | de226ec | 2017-06-25 09:31:19 -0300 | [diff] [blame] | 141 | int retval; |
Jarod Wilson | 4a62a5a | 2010-07-03 01:06:57 -0300 | [diff] [blame] | 142 | |
Sean Young | 7e45d66 | 2017-11-02 17:21:13 -0400 | [diff] [blame] | 143 | if (!fh) |
| 144 | return -ENOMEM; |
Jarod Wilson | 4a62a5a | 2010-07-03 01:06:57 -0300 | [diff] [blame] | 145 | |
Sean Young | 7e45d66 | 2017-11-02 17:21:13 -0400 | [diff] [blame] | 146 | get_device(&dev->dev); |
David Härdeman | 3381b77 | 2017-06-30 05:41:57 -0300 | [diff] [blame] | 147 | |
Sean Young | 42e0442 | 2017-11-02 16:39:16 -0400 | [diff] [blame] | 148 | if (!dev->registered) { |
David Härdeman | 3381b77 | 2017-06-30 05:41:57 -0300 | [diff] [blame] | 149 | retval = -ENODEV; |
Sean Young | 7e45d66 | 2017-11-02 17:21:13 -0400 | [diff] [blame] | 150 | goto out_fh; |
David Härdeman | 3381b77 | 2017-06-30 05:41:57 -0300 | [diff] [blame] | 151 | } |
| 152 | |
Sean Young | 7e45d66 | 2017-11-02 17:21:13 -0400 | [diff] [blame] | 153 | if (dev->driver_type == RC_DRIVER_IR_RAW) { |
| 154 | if (kfifo_alloc(&fh->rawir, MAX_IR_EVENT_SIZE, GFP_KERNEL)) { |
| 155 | retval = -ENOMEM; |
| 156 | goto out_fh; |
| 157 | } |
David Härdeman | 3381b77 | 2017-06-30 05:41:57 -0300 | [diff] [blame] | 158 | } |
Jarod Wilson | 4a62a5a | 2010-07-03 01:06:57 -0300 | [diff] [blame] | 159 | |
Sean Young | 7e45d66 | 2017-11-02 17:21:13 -0400 | [diff] [blame] | 160 | if (dev->driver_type != RC_DRIVER_IR_RAW_TX) { |
| 161 | if (kfifo_alloc(&fh->scancodes, 32, GFP_KERNEL)) { |
| 162 | retval = -ENOMEM; |
| 163 | goto out_rawir; |
| 164 | } |
Srinivas Kandagatla | ca7a722 | 2013-07-22 04:23:07 -0300 | [diff] [blame] | 165 | } |
| 166 | |
Sean Young | 7e45d66 | 2017-11-02 17:21:13 -0400 | [diff] [blame] | 167 | fh->send_mode = LIRC_MODE_PULSE; |
| 168 | fh->rc = dev; |
| 169 | fh->send_timeout_reports = true; |
David Härdeman | 2c5a1f44 | 2017-05-01 13:03:46 -0300 | [diff] [blame] | 170 | |
Sean Young | 7e45d66 | 2017-11-02 17:21:13 -0400 | [diff] [blame] | 171 | if (dev->driver_type == RC_DRIVER_SCANCODE) |
| 172 | fh->rec_mode = LIRC_MODE_SCANCODE; |
| 173 | else |
| 174 | fh->rec_mode = LIRC_MODE_MODE2; |
Jarod Wilson | 4a62a5a | 2010-07-03 01:06:57 -0300 | [diff] [blame] | 175 | |
Sean Young | 7e45d66 | 2017-11-02 17:21:13 -0400 | [diff] [blame] | 176 | retval = rc_open(dev); |
| 177 | if (retval) |
| 178 | goto out_kfifo; |
| 179 | |
| 180 | init_waitqueue_head(&fh->wait_poll); |
| 181 | |
| 182 | file->private_data = fh; |
| 183 | spin_lock_irqsave(&dev->lirc_fh_lock, flags); |
| 184 | list_add(&fh->list, &dev->lirc_fh); |
| 185 | spin_unlock_irqrestore(&dev->lirc_fh_lock, flags); |
Sean Young | 42e0442 | 2017-11-02 16:39:16 -0400 | [diff] [blame] | 186 | |
Kirill Smelkov | c5bf68f | 2019-03-26 23:51:19 +0300 | [diff] [blame] | 187 | stream_open(inode, file); |
Arnd Bergmann | d9d2e9d | 2010-08-15 18:51:56 +0200 | [diff] [blame] | 188 | |
David Härdeman | de226ec | 2017-06-25 09:31:19 -0300 | [diff] [blame] | 189 | return 0; |
Sean Young | 7e45d66 | 2017-11-02 17:21:13 -0400 | [diff] [blame] | 190 | out_kfifo: |
| 191 | if (dev->driver_type != RC_DRIVER_IR_RAW_TX) |
| 192 | kfifo_free(&fh->scancodes); |
| 193 | out_rawir: |
| 194 | if (dev->driver_type == RC_DRIVER_IR_RAW) |
| 195 | kfifo_free(&fh->rawir); |
| 196 | out_fh: |
| 197 | kfree(fh); |
| 198 | put_device(&dev->dev); |
David Härdeman | 3381b77 | 2017-06-30 05:41:57 -0300 | [diff] [blame] | 199 | |
David Härdeman | 3381b77 | 2017-06-30 05:41:57 -0300 | [diff] [blame] | 200 | return retval; |
Jarod Wilson | 4a62a5a | 2010-07-03 01:06:57 -0300 | [diff] [blame] | 201 | } |
Jarod Wilson | 4a62a5a | 2010-07-03 01:06:57 -0300 | [diff] [blame] | 202 | |
Sean Young | 75992a4 | 2020-08-24 21:10:45 +0200 | [diff] [blame] | 203 | static int lirc_close(struct inode *inode, struct file *file) |
Jarod Wilson | 4a62a5a | 2010-07-03 01:06:57 -0300 | [diff] [blame] | 204 | { |
Sean Young | 7e45d66 | 2017-11-02 17:21:13 -0400 | [diff] [blame] | 205 | struct lirc_fh *fh = file->private_data; |
| 206 | struct rc_dev *dev = fh->rc; |
| 207 | unsigned long flags; |
Jarod Wilson | 4a62a5a | 2010-07-03 01:06:57 -0300 | [diff] [blame] | 208 | |
Sean Young | 7e45d66 | 2017-11-02 17:21:13 -0400 | [diff] [blame] | 209 | spin_lock_irqsave(&dev->lirc_fh_lock, flags); |
| 210 | list_del(&fh->list); |
| 211 | spin_unlock_irqrestore(&dev->lirc_fh_lock, flags); |
Jarod Wilson | 4a62a5a | 2010-07-03 01:06:57 -0300 | [diff] [blame] | 212 | |
Sean Young | 7e45d66 | 2017-11-02 17:21:13 -0400 | [diff] [blame] | 213 | if (dev->driver_type == RC_DRIVER_IR_RAW) |
| 214 | kfifo_free(&fh->rawir); |
| 215 | if (dev->driver_type != RC_DRIVER_IR_RAW_TX) |
| 216 | kfifo_free(&fh->scancodes); |
| 217 | kfree(fh); |
David Härdeman | 3381b77 | 2017-06-30 05:41:57 -0300 | [diff] [blame] | 218 | |
Sean Young | 42e0442 | 2017-11-02 16:39:16 -0400 | [diff] [blame] | 219 | rc_close(dev); |
Sean Young | 7e45d66 | 2017-11-02 17:21:13 -0400 | [diff] [blame] | 220 | put_device(&dev->dev); |
Jarod Wilson | 4a62a5a | 2010-07-03 01:06:57 -0300 | [diff] [blame] | 221 | |
| 222 | return 0; |
| 223 | } |
Jarod Wilson | 4a62a5a | 2010-07-03 01:06:57 -0300 | [diff] [blame] | 224 | |
Sean Young | 75992a4 | 2020-08-24 21:10:45 +0200 | [diff] [blame] | 225 | static ssize_t lirc_transmit(struct file *file, const char __user *buf, |
| 226 | size_t n, loff_t *ppos) |
Jarod Wilson | 4a62a5a | 2010-07-03 01:06:57 -0300 | [diff] [blame] | 227 | { |
Sean Young | 7e45d66 | 2017-11-02 17:21:13 -0400 | [diff] [blame] | 228 | struct lirc_fh *fh = file->private_data; |
| 229 | struct rc_dev *dev = fh->rc; |
Sean Young | a74b2bf | 2017-12-13 16:09:21 -0500 | [diff] [blame] | 230 | unsigned int *txbuf; |
Sean Young | 42e0442 | 2017-11-02 16:39:16 -0400 | [diff] [blame] | 231 | struct ir_raw_event *raw = NULL; |
Sean Young | 4957133 | 2017-11-04 08:30:45 -0400 | [diff] [blame] | 232 | ssize_t ret; |
Sean Young | 42e0442 | 2017-11-02 16:39:16 -0400 | [diff] [blame] | 233 | size_t count; |
| 234 | ktime_t start; |
| 235 | s64 towait; |
| 236 | unsigned int duration = 0; /* signal duration in us */ |
| 237 | int i; |
Jarod Wilson | 4a62a5a | 2010-07-03 01:06:57 -0300 | [diff] [blame] | 238 | |
Sean Young | 4957133 | 2017-11-04 08:30:45 -0400 | [diff] [blame] | 239 | ret = mutex_lock_interruptible(&dev->lock); |
| 240 | if (ret) |
| 241 | return ret; |
Jarod Wilson | 4a62a5a | 2010-07-03 01:06:57 -0300 | [diff] [blame] | 242 | |
Sean Young | 4957133 | 2017-11-04 08:30:45 -0400 | [diff] [blame] | 243 | if (!dev->registered) { |
| 244 | ret = -ENODEV; |
Sean Young | a74b2bf | 2017-12-13 16:09:21 -0500 | [diff] [blame] | 245 | goto out_unlock; |
David Härdeman | b15e393 | 2017-06-25 09:32:36 -0300 | [diff] [blame] | 246 | } |
Jarod Wilson | 4a62a5a | 2010-07-03 01:06:57 -0300 | [diff] [blame] | 247 | |
Sean Young | 42e0442 | 2017-11-02 16:39:16 -0400 | [diff] [blame] | 248 | if (!dev->tx_ir) { |
| 249 | ret = -EINVAL; |
Sean Young | a74b2bf | 2017-12-13 16:09:21 -0500 | [diff] [blame] | 250 | goto out_unlock; |
Sean Young | 42e0442 | 2017-11-02 16:39:16 -0400 | [diff] [blame] | 251 | } |
| 252 | |
Sean Young | 7e45d66 | 2017-11-02 17:21:13 -0400 | [diff] [blame] | 253 | if (fh->send_mode == LIRC_MODE_SCANCODE) { |
Sean Young | 42e0442 | 2017-11-02 16:39:16 -0400 | [diff] [blame] | 254 | struct lirc_scancode scan; |
| 255 | |
Sean Young | 4957133 | 2017-11-04 08:30:45 -0400 | [diff] [blame] | 256 | if (n != sizeof(scan)) { |
| 257 | ret = -EINVAL; |
Sean Young | a74b2bf | 2017-12-13 16:09:21 -0500 | [diff] [blame] | 258 | goto out_unlock; |
Sean Young | 4957133 | 2017-11-04 08:30:45 -0400 | [diff] [blame] | 259 | } |
Sean Young | 42e0442 | 2017-11-02 16:39:16 -0400 | [diff] [blame] | 260 | |
Sean Young | 4957133 | 2017-11-04 08:30:45 -0400 | [diff] [blame] | 261 | if (copy_from_user(&scan, buf, sizeof(scan))) { |
| 262 | ret = -EFAULT; |
Sean Young | a74b2bf | 2017-12-13 16:09:21 -0500 | [diff] [blame] | 263 | goto out_unlock; |
Sean Young | 4957133 | 2017-11-04 08:30:45 -0400 | [diff] [blame] | 264 | } |
Sean Young | 42e0442 | 2017-11-02 16:39:16 -0400 | [diff] [blame] | 265 | |
Dan Carpenter | 72e637f | 2020-10-30 12:52:30 +0100 | [diff] [blame] | 266 | if (scan.flags || scan.keycode || scan.timestamp || |
| 267 | scan.rc_proto > RC_PROTO_MAX) { |
Sean Young | 4957133 | 2017-11-04 08:30:45 -0400 | [diff] [blame] | 268 | ret = -EINVAL; |
Sean Young | a74b2bf | 2017-12-13 16:09:21 -0500 | [diff] [blame] | 269 | goto out_unlock; |
Sean Young | 4957133 | 2017-11-04 08:30:45 -0400 | [diff] [blame] | 270 | } |
Sean Young | 42e0442 | 2017-11-02 16:39:16 -0400 | [diff] [blame] | 271 | |
Sean Young | e6c6d7d | 2020-01-17 17:46:36 +0100 | [diff] [blame] | 272 | /* We only have encoders for 32-bit protocols. */ |
Sean Young | 42e0442 | 2017-11-02 16:39:16 -0400 | [diff] [blame] | 273 | if (scan.scancode > U32_MAX || |
Sean Young | 4957133 | 2017-11-04 08:30:45 -0400 | [diff] [blame] | 274 | !rc_validate_scancode(scan.rc_proto, scan.scancode)) { |
| 275 | ret = -EINVAL; |
Sean Young | a74b2bf | 2017-12-13 16:09:21 -0500 | [diff] [blame] | 276 | goto out_unlock; |
Sean Young | 4957133 | 2017-11-04 08:30:45 -0400 | [diff] [blame] | 277 | } |
Sean Young | 42e0442 | 2017-11-02 16:39:16 -0400 | [diff] [blame] | 278 | |
| 279 | raw = kmalloc_array(LIRCBUF_SIZE, sizeof(*raw), GFP_KERNEL); |
Sean Young | 4957133 | 2017-11-04 08:30:45 -0400 | [diff] [blame] | 280 | if (!raw) { |
| 281 | ret = -ENOMEM; |
Sean Young | a74b2bf | 2017-12-13 16:09:21 -0500 | [diff] [blame] | 282 | goto out_unlock; |
Sean Young | 4957133 | 2017-11-04 08:30:45 -0400 | [diff] [blame] | 283 | } |
Sean Young | 42e0442 | 2017-11-02 16:39:16 -0400 | [diff] [blame] | 284 | |
| 285 | ret = ir_raw_encode_scancode(scan.rc_proto, scan.scancode, |
| 286 | raw, LIRCBUF_SIZE); |
| 287 | if (ret < 0) |
Colin Ian King | 8d25e15 | 2017-12-19 11:48:25 -0500 | [diff] [blame] | 288 | goto out_kfree_raw; |
Sean Young | 42e0442 | 2017-11-02 16:39:16 -0400 | [diff] [blame] | 289 | |
| 290 | count = ret; |
| 291 | |
| 292 | txbuf = kmalloc_array(count, sizeof(unsigned int), GFP_KERNEL); |
| 293 | if (!txbuf) { |
| 294 | ret = -ENOMEM; |
Colin Ian King | 8d25e15 | 2017-12-19 11:48:25 -0500 | [diff] [blame] | 295 | goto out_kfree_raw; |
Sean Young | 42e0442 | 2017-11-02 16:39:16 -0400 | [diff] [blame] | 296 | } |
| 297 | |
| 298 | for (i = 0; i < count; i++) |
Sean Young | 528222d8 | 2020-08-23 19:23:05 +0200 | [diff] [blame] | 299 | txbuf[i] = raw[i].duration; |
Sean Young | 42e0442 | 2017-11-02 16:39:16 -0400 | [diff] [blame] | 300 | |
| 301 | if (dev->s_tx_carrier) { |
| 302 | int carrier = ir_raw_encode_carrier(scan.rc_proto); |
| 303 | |
| 304 | if (carrier > 0) |
| 305 | dev->s_tx_carrier(dev, carrier); |
| 306 | } |
| 307 | } else { |
Sean Young | 4957133 | 2017-11-04 08:30:45 -0400 | [diff] [blame] | 308 | if (n < sizeof(unsigned int) || n % sizeof(unsigned int)) { |
| 309 | ret = -EINVAL; |
Sean Young | a74b2bf | 2017-12-13 16:09:21 -0500 | [diff] [blame] | 310 | goto out_unlock; |
Sean Young | 4957133 | 2017-11-04 08:30:45 -0400 | [diff] [blame] | 311 | } |
Sean Young | 42e0442 | 2017-11-02 16:39:16 -0400 | [diff] [blame] | 312 | |
| 313 | count = n / sizeof(unsigned int); |
Sean Young | 4957133 | 2017-11-04 08:30:45 -0400 | [diff] [blame] | 314 | if (count > LIRCBUF_SIZE || count % 2 == 0) { |
| 315 | ret = -EINVAL; |
Sean Young | a74b2bf | 2017-12-13 16:09:21 -0500 | [diff] [blame] | 316 | goto out_unlock; |
Sean Young | 4957133 | 2017-11-04 08:30:45 -0400 | [diff] [blame] | 317 | } |
Sean Young | 42e0442 | 2017-11-02 16:39:16 -0400 | [diff] [blame] | 318 | |
| 319 | txbuf = memdup_user(buf, n); |
Sean Young | 4957133 | 2017-11-04 08:30:45 -0400 | [diff] [blame] | 320 | if (IS_ERR(txbuf)) { |
| 321 | ret = PTR_ERR(txbuf); |
Sean Young | a74b2bf | 2017-12-13 16:09:21 -0500 | [diff] [blame] | 322 | goto out_unlock; |
Sean Young | 4957133 | 2017-11-04 08:30:45 -0400 | [diff] [blame] | 323 | } |
Sean Young | 42e0442 | 2017-11-02 16:39:16 -0400 | [diff] [blame] | 324 | } |
| 325 | |
| 326 | for (i = 0; i < count; i++) { |
Sean Young | 528222d8 | 2020-08-23 19:23:05 +0200 | [diff] [blame] | 327 | if (txbuf[i] > IR_MAX_DURATION - duration || !txbuf[i]) { |
Sean Young | 42e0442 | 2017-11-02 16:39:16 -0400 | [diff] [blame] | 328 | ret = -EINVAL; |
Sean Young | a74b2bf | 2017-12-13 16:09:21 -0500 | [diff] [blame] | 329 | goto out_kfree; |
Sean Young | 42e0442 | 2017-11-02 16:39:16 -0400 | [diff] [blame] | 330 | } |
| 331 | |
| 332 | duration += txbuf[i]; |
| 333 | } |
| 334 | |
Sean Young | 2942273 | 2018-02-12 09:00:28 -0500 | [diff] [blame] | 335 | start = ktime_get(); |
| 336 | |
Sean Young | 42e0442 | 2017-11-02 16:39:16 -0400 | [diff] [blame] | 337 | ret = dev->tx_ir(dev, txbuf, count); |
| 338 | if (ret < 0) |
Sean Young | a74b2bf | 2017-12-13 16:09:21 -0500 | [diff] [blame] | 339 | goto out_kfree; |
Sean Young | 42e0442 | 2017-11-02 16:39:16 -0400 | [diff] [blame] | 340 | |
Sean Young | f81a815 | 2017-12-13 16:30:22 -0500 | [diff] [blame] | 341 | kfree(txbuf); |
| 342 | kfree(raw); |
| 343 | mutex_unlock(&dev->lock); |
| 344 | |
Sean Young | dde7edf | 2017-12-11 17:12:09 -0500 | [diff] [blame] | 345 | /* |
| 346 | * The lircd gap calculation expects the write function to |
| 347 | * wait for the actual IR signal to be transmitted before |
| 348 | * returning. |
| 349 | */ |
| 350 | towait = ktime_us_delta(ktime_add_us(start, duration), |
| 351 | ktime_get()); |
| 352 | if (towait > 0) { |
| 353 | set_current_state(TASK_INTERRUPTIBLE); |
| 354 | schedule_timeout(usecs_to_jiffies(towait)); |
Sean Young | 42e0442 | 2017-11-02 16:39:16 -0400 | [diff] [blame] | 355 | } |
| 356 | |
Sean Young | f81a815 | 2017-12-13 16:30:22 -0500 | [diff] [blame] | 357 | return n; |
Sean Young | a74b2bf | 2017-12-13 16:09:21 -0500 | [diff] [blame] | 358 | out_kfree: |
Sean Young | 42e0442 | 2017-11-02 16:39:16 -0400 | [diff] [blame] | 359 | kfree(txbuf); |
Colin Ian King | 8d25e15 | 2017-12-19 11:48:25 -0500 | [diff] [blame] | 360 | out_kfree_raw: |
Sean Young | 42e0442 | 2017-11-02 16:39:16 -0400 | [diff] [blame] | 361 | kfree(raw); |
Sean Young | a74b2bf | 2017-12-13 16:09:21 -0500 | [diff] [blame] | 362 | out_unlock: |
| 363 | mutex_unlock(&dev->lock); |
Jarod Wilson | 4a62a5a | 2010-07-03 01:06:57 -0300 | [diff] [blame] | 364 | return ret; |
| 365 | } |
Jarod Wilson | 4a62a5a | 2010-07-03 01:06:57 -0300 | [diff] [blame] | 366 | |
Sean Young | 75992a4 | 2020-08-24 21:10:45 +0200 | [diff] [blame] | 367 | static long lirc_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
Jarod Wilson | 4a62a5a | 2010-07-03 01:06:57 -0300 | [diff] [blame] | 368 | { |
Sean Young | 7e45d66 | 2017-11-02 17:21:13 -0400 | [diff] [blame] | 369 | struct lirc_fh *fh = file->private_data; |
| 370 | struct rc_dev *dev = fh->rc; |
Sean Young | 42e0442 | 2017-11-02 16:39:16 -0400 | [diff] [blame] | 371 | u32 __user *argp = (u32 __user *)(arg); |
Sean Young | 4957133 | 2017-11-04 08:30:45 -0400 | [diff] [blame] | 372 | u32 val = 0; |
| 373 | int ret; |
Jarod Wilson | 4a62a5a | 2010-07-03 01:06:57 -0300 | [diff] [blame] | 374 | |
Sean Young | 42e0442 | 2017-11-02 16:39:16 -0400 | [diff] [blame] | 375 | if (_IOC_DIR(cmd) & _IOC_WRITE) { |
| 376 | ret = get_user(val, argp); |
| 377 | if (ret) |
| 378 | return ret; |
| 379 | } |
Jarod Wilson | 4a62a5a | 2010-07-03 01:06:57 -0300 | [diff] [blame] | 380 | |
Sean Young | 4957133 | 2017-11-04 08:30:45 -0400 | [diff] [blame] | 381 | ret = mutex_lock_interruptible(&dev->lock); |
| 382 | if (ret) |
| 383 | return ret; |
Jarod Wilson | 4a62a5a | 2010-07-03 01:06:57 -0300 | [diff] [blame] | 384 | |
Sean Young | 4957133 | 2017-11-04 08:30:45 -0400 | [diff] [blame] | 385 | if (!dev->registered) { |
| 386 | ret = -ENODEV; |
David Härdeman | 3381b77 | 2017-06-30 05:41:57 -0300 | [diff] [blame] | 387 | goto out; |
| 388 | } |
Jarod Wilson | 4a62a5a | 2010-07-03 01:06:57 -0300 | [diff] [blame] | 389 | |
| 390 | switch (cmd) { |
| 391 | case LIRC_GET_FEATURES: |
Sean Young | 42e0442 | 2017-11-02 16:39:16 -0400 | [diff] [blame] | 392 | if (dev->driver_type == RC_DRIVER_SCANCODE) |
| 393 | val |= LIRC_CAN_REC_SCANCODE; |
| 394 | |
| 395 | if (dev->driver_type == RC_DRIVER_IR_RAW) { |
Sean Young | 02d742f | 2017-12-28 14:58:26 -0500 | [diff] [blame] | 396 | val |= LIRC_CAN_REC_MODE2; |
Sean Young | 42e0442 | 2017-11-02 16:39:16 -0400 | [diff] [blame] | 397 | if (dev->rx_resolution) |
| 398 | val |= LIRC_CAN_GET_REC_RESOLUTION; |
| 399 | } |
| 400 | |
| 401 | if (dev->tx_ir) { |
Sean Young | 02d742f | 2017-12-28 14:58:26 -0500 | [diff] [blame] | 402 | val |= LIRC_CAN_SEND_PULSE; |
Sean Young | 42e0442 | 2017-11-02 16:39:16 -0400 | [diff] [blame] | 403 | if (dev->s_tx_mask) |
| 404 | val |= LIRC_CAN_SET_TRANSMITTER_MASK; |
| 405 | if (dev->s_tx_carrier) |
| 406 | val |= LIRC_CAN_SET_SEND_CARRIER; |
| 407 | if (dev->s_tx_duty_cycle) |
| 408 | val |= LIRC_CAN_SET_SEND_DUTY_CYCLE; |
| 409 | } |
| 410 | |
| 411 | if (dev->s_rx_carrier_range) |
| 412 | val |= LIRC_CAN_SET_REC_CARRIER | |
| 413 | LIRC_CAN_SET_REC_CARRIER_RANGE; |
| 414 | |
| 415 | if (dev->s_learning_mode) |
| 416 | val |= LIRC_CAN_USE_WIDEBAND_RECEIVER; |
| 417 | |
| 418 | if (dev->s_carrier_report) |
| 419 | val |= LIRC_CAN_MEASURE_CARRIER; |
| 420 | |
| 421 | if (dev->max_timeout) |
| 422 | val |= LIRC_CAN_SET_REC_TIMEOUT; |
| 423 | |
Jarod Wilson | 4a62a5a | 2010-07-03 01:06:57 -0300 | [diff] [blame] | 424 | break; |
Sean Young | 42e0442 | 2017-11-02 16:39:16 -0400 | [diff] [blame] | 425 | |
| 426 | /* mode support */ |
Jarod Wilson | 4a62a5a | 2010-07-03 01:06:57 -0300 | [diff] [blame] | 427 | case LIRC_GET_REC_MODE: |
Sean Young | 42e0442 | 2017-11-02 16:39:16 -0400 | [diff] [blame] | 428 | if (dev->driver_type == RC_DRIVER_IR_RAW_TX) |
Sean Young | 4957133 | 2017-11-04 08:30:45 -0400 | [diff] [blame] | 429 | ret = -ENOTTY; |
| 430 | else |
| 431 | val = fh->rec_mode; |
Jarod Wilson | 4a62a5a | 2010-07-03 01:06:57 -0300 | [diff] [blame] | 432 | break; |
Sean Young | 42e0442 | 2017-11-02 16:39:16 -0400 | [diff] [blame] | 433 | |
Jarod Wilson | 4a62a5a | 2010-07-03 01:06:57 -0300 | [diff] [blame] | 434 | case LIRC_SET_REC_MODE: |
Sean Young | 42e0442 | 2017-11-02 16:39:16 -0400 | [diff] [blame] | 435 | switch (dev->driver_type) { |
| 436 | case RC_DRIVER_IR_RAW_TX: |
Sean Young | 4957133 | 2017-11-04 08:30:45 -0400 | [diff] [blame] | 437 | ret = -ENOTTY; |
| 438 | break; |
Sean Young | 42e0442 | 2017-11-02 16:39:16 -0400 | [diff] [blame] | 439 | case RC_DRIVER_SCANCODE: |
| 440 | if (val != LIRC_MODE_SCANCODE) |
Sean Young | 4957133 | 2017-11-04 08:30:45 -0400 | [diff] [blame] | 441 | ret = -EINVAL; |
Sean Young | 42e0442 | 2017-11-02 16:39:16 -0400 | [diff] [blame] | 442 | break; |
| 443 | case RC_DRIVER_IR_RAW: |
| 444 | if (!(val == LIRC_MODE_MODE2 || |
| 445 | val == LIRC_MODE_SCANCODE)) |
Sean Young | 4957133 | 2017-11-04 08:30:45 -0400 | [diff] [blame] | 446 | ret = -EINVAL; |
Jarod Wilson | 4a62a5a | 2010-07-03 01:06:57 -0300 | [diff] [blame] | 447 | break; |
| 448 | } |
| 449 | |
Sean Young | 4957133 | 2017-11-04 08:30:45 -0400 | [diff] [blame] | 450 | if (!ret) |
| 451 | fh->rec_mode = val; |
Jarod Wilson | 4a62a5a | 2010-07-03 01:06:57 -0300 | [diff] [blame] | 452 | break; |
Sean Young | 42e0442 | 2017-11-02 16:39:16 -0400 | [diff] [blame] | 453 | |
| 454 | case LIRC_GET_SEND_MODE: |
| 455 | if (!dev->tx_ir) |
Sean Young | 4957133 | 2017-11-04 08:30:45 -0400 | [diff] [blame] | 456 | ret = -ENOTTY; |
| 457 | else |
| 458 | val = fh->send_mode; |
Jarod Wilson | 4a62a5a | 2010-07-03 01:06:57 -0300 | [diff] [blame] | 459 | break; |
Sean Young | 42e0442 | 2017-11-02 16:39:16 -0400 | [diff] [blame] | 460 | |
| 461 | case LIRC_SET_SEND_MODE: |
| 462 | if (!dev->tx_ir) |
Sean Young | 4957133 | 2017-11-04 08:30:45 -0400 | [diff] [blame] | 463 | ret = -ENOTTY; |
| 464 | else if (!(val == LIRC_MODE_PULSE || val == LIRC_MODE_SCANCODE)) |
| 465 | ret = -EINVAL; |
| 466 | else |
| 467 | fh->send_mode = val; |
| 468 | break; |
Sean Young | 42e0442 | 2017-11-02 16:39:16 -0400 | [diff] [blame] | 469 | |
| 470 | /* TX settings */ |
| 471 | case LIRC_SET_TRANSMITTER_MASK: |
| 472 | if (!dev->s_tx_mask) |
Sean Young | 4957133 | 2017-11-04 08:30:45 -0400 | [diff] [blame] | 473 | ret = -ENOTTY; |
| 474 | else |
| 475 | ret = dev->s_tx_mask(dev, val); |
| 476 | break; |
Sean Young | 42e0442 | 2017-11-02 16:39:16 -0400 | [diff] [blame] | 477 | |
| 478 | case LIRC_SET_SEND_CARRIER: |
| 479 | if (!dev->s_tx_carrier) |
Sean Young | 4957133 | 2017-11-04 08:30:45 -0400 | [diff] [blame] | 480 | ret = -ENOTTY; |
| 481 | else |
| 482 | ret = dev->s_tx_carrier(dev, val); |
| 483 | break; |
Sean Young | 42e0442 | 2017-11-02 16:39:16 -0400 | [diff] [blame] | 484 | |
| 485 | case LIRC_SET_SEND_DUTY_CYCLE: |
| 486 | if (!dev->s_tx_duty_cycle) |
Sean Young | 4957133 | 2017-11-04 08:30:45 -0400 | [diff] [blame] | 487 | ret = -ENOTTY; |
| 488 | else if (val <= 0 || val >= 100) |
| 489 | ret = -EINVAL; |
| 490 | else |
| 491 | ret = dev->s_tx_duty_cycle(dev, val); |
| 492 | break; |
Sean Young | 42e0442 | 2017-11-02 16:39:16 -0400 | [diff] [blame] | 493 | |
| 494 | /* RX settings */ |
| 495 | case LIRC_SET_REC_CARRIER: |
| 496 | if (!dev->s_rx_carrier_range) |
Sean Young | 4957133 | 2017-11-04 08:30:45 -0400 | [diff] [blame] | 497 | ret = -ENOTTY; |
| 498 | else if (val <= 0) |
| 499 | ret = -EINVAL; |
| 500 | else |
| 501 | ret = dev->s_rx_carrier_range(dev, fh->carrier_low, |
| 502 | val); |
| 503 | break; |
Sean Young | 42e0442 | 2017-11-02 16:39:16 -0400 | [diff] [blame] | 504 | |
| 505 | case LIRC_SET_REC_CARRIER_RANGE: |
| 506 | if (!dev->s_rx_carrier_range) |
Sean Young | 4957133 | 2017-11-04 08:30:45 -0400 | [diff] [blame] | 507 | ret = -ENOTTY; |
| 508 | else if (val <= 0) |
| 509 | ret = -EINVAL; |
| 510 | else |
| 511 | fh->carrier_low = val; |
| 512 | break; |
Sean Young | 42e0442 | 2017-11-02 16:39:16 -0400 | [diff] [blame] | 513 | |
| 514 | case LIRC_GET_REC_RESOLUTION: |
| 515 | if (!dev->rx_resolution) |
Sean Young | 4957133 | 2017-11-04 08:30:45 -0400 | [diff] [blame] | 516 | ret = -ENOTTY; |
| 517 | else |
Sean Young | 528222d8 | 2020-08-23 19:23:05 +0200 | [diff] [blame] | 518 | val = dev->rx_resolution; |
Sean Young | 42e0442 | 2017-11-02 16:39:16 -0400 | [diff] [blame] | 519 | break; |
| 520 | |
| 521 | case LIRC_SET_WIDEBAND_RECEIVER: |
| 522 | if (!dev->s_learning_mode) |
Sean Young | 4957133 | 2017-11-04 08:30:45 -0400 | [diff] [blame] | 523 | ret = -ENOTTY; |
| 524 | else |
| 525 | ret = dev->s_learning_mode(dev, !!val); |
| 526 | break; |
Sean Young | 42e0442 | 2017-11-02 16:39:16 -0400 | [diff] [blame] | 527 | |
| 528 | case LIRC_SET_MEASURE_CARRIER_MODE: |
| 529 | if (!dev->s_carrier_report) |
Sean Young | 4957133 | 2017-11-04 08:30:45 -0400 | [diff] [blame] | 530 | ret = -ENOTTY; |
| 531 | else |
| 532 | ret = dev->s_carrier_report(dev, !!val); |
| 533 | break; |
Sean Young | 42e0442 | 2017-11-02 16:39:16 -0400 | [diff] [blame] | 534 | |
| 535 | /* Generic timeout support */ |
| 536 | case LIRC_GET_MIN_TIMEOUT: |
| 537 | if (!dev->max_timeout) |
Sean Young | 4957133 | 2017-11-04 08:30:45 -0400 | [diff] [blame] | 538 | ret = -ENOTTY; |
| 539 | else |
Sean Young | 528222d8 | 2020-08-23 19:23:05 +0200 | [diff] [blame] | 540 | val = dev->min_timeout; |
Sean Young | 42e0442 | 2017-11-02 16:39:16 -0400 | [diff] [blame] | 541 | break; |
| 542 | |
| 543 | case LIRC_GET_MAX_TIMEOUT: |
| 544 | if (!dev->max_timeout) |
Sean Young | 4957133 | 2017-11-04 08:30:45 -0400 | [diff] [blame] | 545 | ret = -ENOTTY; |
| 546 | else |
Sean Young | 528222d8 | 2020-08-23 19:23:05 +0200 | [diff] [blame] | 547 | val = dev->max_timeout; |
Sean Young | 42e0442 | 2017-11-02 16:39:16 -0400 | [diff] [blame] | 548 | break; |
| 549 | |
| 550 | case LIRC_SET_REC_TIMEOUT: |
Sean Young | 4957133 | 2017-11-04 08:30:45 -0400 | [diff] [blame] | 551 | if (!dev->max_timeout) { |
| 552 | ret = -ENOTTY; |
Sean Young | 4957133 | 2017-11-04 08:30:45 -0400 | [diff] [blame] | 553 | } else { |
Sean Young | 528222d8 | 2020-08-23 19:23:05 +0200 | [diff] [blame] | 554 | if (val < dev->min_timeout || val > dev->max_timeout) |
Sean Young | 4957133 | 2017-11-04 08:30:45 -0400 | [diff] [blame] | 555 | ret = -EINVAL; |
| 556 | else if (dev->s_timeout) |
Sean Young | 528222d8 | 2020-08-23 19:23:05 +0200 | [diff] [blame] | 557 | ret = dev->s_timeout(dev, val); |
Sean Young | c2837ad | 2018-02-12 08:59:00 -0500 | [diff] [blame] | 558 | else |
Sean Young | 528222d8 | 2020-08-23 19:23:05 +0200 | [diff] [blame] | 559 | dev->timeout = val; |
Sean Young | 4957133 | 2017-11-04 08:30:45 -0400 | [diff] [blame] | 560 | } |
Sean Young | 42e0442 | 2017-11-02 16:39:16 -0400 | [diff] [blame] | 561 | break; |
| 562 | |
Sean Young | 95d1544 | 2018-03-23 16:59:52 -0400 | [diff] [blame] | 563 | case LIRC_GET_REC_TIMEOUT: |
Sean Young | 42e0442 | 2017-11-02 16:39:16 -0400 | [diff] [blame] | 564 | if (!dev->timeout) |
Sean Young | 4957133 | 2017-11-04 08:30:45 -0400 | [diff] [blame] | 565 | ret = -ENOTTY; |
| 566 | else |
Sean Young | 528222d8 | 2020-08-23 19:23:05 +0200 | [diff] [blame] | 567 | val = dev->timeout; |
Sean Young | 95d1544 | 2018-03-23 16:59:52 -0400 | [diff] [blame] | 568 | break; |
| 569 | |
Sean Young | 42e0442 | 2017-11-02 16:39:16 -0400 | [diff] [blame] | 570 | case LIRC_SET_REC_TIMEOUT_REPORTS: |
Sean Young | 2849225 | 2018-03-24 08:02:48 -0400 | [diff] [blame] | 571 | if (dev->driver_type != RC_DRIVER_IR_RAW) |
Sean Young | 4957133 | 2017-11-04 08:30:45 -0400 | [diff] [blame] | 572 | ret = -ENOTTY; |
| 573 | else |
| 574 | fh->send_timeout_reports = !!val; |
Sean Young | 42e0442 | 2017-11-02 16:39:16 -0400 | [diff] [blame] | 575 | break; |
| 576 | |
Jarod Wilson | 4a62a5a | 2010-07-03 01:06:57 -0300 | [diff] [blame] | 577 | default: |
Sean Young | 4957133 | 2017-11-04 08:30:45 -0400 | [diff] [blame] | 578 | ret = -ENOTTY; |
Jarod Wilson | 4a62a5a | 2010-07-03 01:06:57 -0300 | [diff] [blame] | 579 | } |
| 580 | |
Sean Young | 4957133 | 2017-11-04 08:30:45 -0400 | [diff] [blame] | 581 | if (!ret && _IOC_DIR(cmd) & _IOC_READ) |
Sean Young | 42e0442 | 2017-11-02 16:39:16 -0400 | [diff] [blame] | 582 | ret = put_user(val, argp); |
| 583 | |
David Härdeman | 3381b77 | 2017-06-30 05:41:57 -0300 | [diff] [blame] | 584 | out: |
Sean Young | 4957133 | 2017-11-04 08:30:45 -0400 | [diff] [blame] | 585 | mutex_unlock(&dev->lock); |
Sean Young | 42e0442 | 2017-11-02 16:39:16 -0400 | [diff] [blame] | 586 | return ret; |
Jarod Wilson | 4a62a5a | 2010-07-03 01:06:57 -0300 | [diff] [blame] | 587 | } |
Jarod Wilson | 4a62a5a | 2010-07-03 01:06:57 -0300 | [diff] [blame] | 588 | |
Sean Young | 75992a4 | 2020-08-24 21:10:45 +0200 | [diff] [blame] | 589 | static __poll_t lirc_poll(struct file *file, struct poll_table_struct *wait) |
Jarod Wilson | 4a62a5a | 2010-07-03 01:06:57 -0300 | [diff] [blame] | 590 | { |
Sean Young | 7e45d66 | 2017-11-02 17:21:13 -0400 | [diff] [blame] | 591 | struct lirc_fh *fh = file->private_data; |
| 592 | struct rc_dev *rcdev = fh->rc; |
Linus Torvalds | 68c5735 | 2018-02-06 11:27:48 -0800 | [diff] [blame] | 593 | __poll_t events = 0; |
Jarod Wilson | 4a62a5a | 2010-07-03 01:06:57 -0300 | [diff] [blame] | 594 | |
Sean Young | 7e45d66 | 2017-11-02 17:21:13 -0400 | [diff] [blame] | 595 | poll_wait(file, &fh->wait_poll, wait); |
Jarod Wilson | 715d29a7 | 2010-10-18 12:02:01 -0300 | [diff] [blame] | 596 | |
Sean Young | 42e0442 | 2017-11-02 16:39:16 -0400 | [diff] [blame] | 597 | if (!rcdev->registered) { |
Linus Torvalds | a9a0884 | 2018-02-11 14:34:03 -0800 | [diff] [blame] | 598 | events = EPOLLHUP | EPOLLERR; |
Sean Young | 42e0442 | 2017-11-02 16:39:16 -0400 | [diff] [blame] | 599 | } else if (rcdev->driver_type != RC_DRIVER_IR_RAW_TX) { |
Sean Young | 7e45d66 | 2017-11-02 17:21:13 -0400 | [diff] [blame] | 600 | if (fh->rec_mode == LIRC_MODE_SCANCODE && |
| 601 | !kfifo_is_empty(&fh->scancodes)) |
Linus Torvalds | a9a0884 | 2018-02-11 14:34:03 -0800 | [diff] [blame] | 602 | events = EPOLLIN | EPOLLRDNORM; |
David Härdeman | b15e393 | 2017-06-25 09:32:36 -0300 | [diff] [blame] | 603 | |
Sean Young | 7e45d66 | 2017-11-02 17:21:13 -0400 | [diff] [blame] | 604 | if (fh->rec_mode == LIRC_MODE_MODE2 && |
| 605 | !kfifo_is_empty(&fh->rawir)) |
Linus Torvalds | a9a0884 | 2018-02-11 14:34:03 -0800 | [diff] [blame] | 606 | events = EPOLLIN | EPOLLRDNORM; |
Dan Carpenter | 250f7a5 | 2010-11-17 02:20:15 -0300 | [diff] [blame] | 607 | } |
David Härdeman | 3381b77 | 2017-06-30 05:41:57 -0300 | [diff] [blame] | 608 | |
Sean Young | 42e0442 | 2017-11-02 16:39:16 -0400 | [diff] [blame] | 609 | return events; |
| 610 | } |
Jarod Wilson | 4a62a5a | 2010-07-03 01:06:57 -0300 | [diff] [blame] | 611 | |
Sean Young | 75992a4 | 2020-08-24 21:10:45 +0200 | [diff] [blame] | 612 | static ssize_t lirc_read_mode2(struct file *file, char __user *buffer, |
| 613 | size_t length) |
Sean Young | 42e0442 | 2017-11-02 16:39:16 -0400 | [diff] [blame] | 614 | { |
Sean Young | 7e45d66 | 2017-11-02 17:21:13 -0400 | [diff] [blame] | 615 | struct lirc_fh *fh = file->private_data; |
| 616 | struct rc_dev *rcdev = fh->rc; |
Sean Young | 42e0442 | 2017-11-02 16:39:16 -0400 | [diff] [blame] | 617 | unsigned int copied; |
| 618 | int ret; |
David Härdeman | 3381b77 | 2017-06-30 05:41:57 -0300 | [diff] [blame] | 619 | |
Sean Young | 42e0442 | 2017-11-02 16:39:16 -0400 | [diff] [blame] | 620 | if (length < sizeof(unsigned int) || length % sizeof(unsigned int)) |
| 621 | return -EINVAL; |
Jarod Wilson | 4a62a5a | 2010-07-03 01:06:57 -0300 | [diff] [blame] | 622 | |
Sean Young | 42e0442 | 2017-11-02 16:39:16 -0400 | [diff] [blame] | 623 | do { |
Sean Young | 7e45d66 | 2017-11-02 17:21:13 -0400 | [diff] [blame] | 624 | if (kfifo_is_empty(&fh->rawir)) { |
Sean Young | 42e0442 | 2017-11-02 16:39:16 -0400 | [diff] [blame] | 625 | if (file->f_flags & O_NONBLOCK) |
| 626 | return -EAGAIN; |
Jarod Wilson | 4a62a5a | 2010-07-03 01:06:57 -0300 | [diff] [blame] | 627 | |
Sean Young | 7e45d66 | 2017-11-02 17:21:13 -0400 | [diff] [blame] | 628 | ret = wait_event_interruptible(fh->wait_poll, |
| 629 | !kfifo_is_empty(&fh->rawir) || |
Sean Young | 42e0442 | 2017-11-02 16:39:16 -0400 | [diff] [blame] | 630 | !rcdev->registered); |
| 631 | if (ret) |
| 632 | return ret; |
Jarod Wilson | 4a62a5a | 2010-07-03 01:06:57 -0300 | [diff] [blame] | 633 | } |
Jarod Wilson | 4a62a5a | 2010-07-03 01:06:57 -0300 | [diff] [blame] | 634 | |
Sean Young | 42e0442 | 2017-11-02 16:39:16 -0400 | [diff] [blame] | 635 | if (!rcdev->registered) |
| 636 | return -ENODEV; |
Dan Carpenter | 250f7a5 | 2010-11-17 02:20:15 -0300 | [diff] [blame] | 637 | |
Sean Young | 42e0442 | 2017-11-02 16:39:16 -0400 | [diff] [blame] | 638 | ret = mutex_lock_interruptible(&rcdev->lock); |
| 639 | if (ret) |
| 640 | return ret; |
Sean Young | 7e45d66 | 2017-11-02 17:21:13 -0400 | [diff] [blame] | 641 | ret = kfifo_to_user(&fh->rawir, buffer, length, &copied); |
Sean Young | 42e0442 | 2017-11-02 16:39:16 -0400 | [diff] [blame] | 642 | mutex_unlock(&rcdev->lock); |
| 643 | if (ret) |
| 644 | return ret; |
| 645 | } while (copied == 0); |
Jarod Wilson | 4a62a5a | 2010-07-03 01:06:57 -0300 | [diff] [blame] | 646 | |
Sean Young | 42e0442 | 2017-11-02 16:39:16 -0400 | [diff] [blame] | 647 | return copied; |
Jarod Wilson | 4a62a5a | 2010-07-03 01:06:57 -0300 | [diff] [blame] | 648 | } |
Jarod Wilson | 4a62a5a | 2010-07-03 01:06:57 -0300 | [diff] [blame] | 649 | |
Sean Young | 75992a4 | 2020-08-24 21:10:45 +0200 | [diff] [blame] | 650 | static ssize_t lirc_read_scancode(struct file *file, char __user *buffer, |
| 651 | size_t length) |
David Härdeman | 615cd3f | 2017-06-25 09:31:40 -0300 | [diff] [blame] | 652 | { |
Sean Young | 7e45d66 | 2017-11-02 17:21:13 -0400 | [diff] [blame] | 653 | struct lirc_fh *fh = file->private_data; |
| 654 | struct rc_dev *rcdev = fh->rc; |
Sean Young | 42e0442 | 2017-11-02 16:39:16 -0400 | [diff] [blame] | 655 | unsigned int copied; |
| 656 | int ret; |
David Härdeman | 615cd3f | 2017-06-25 09:31:40 -0300 | [diff] [blame] | 657 | |
Sean Young | 42e0442 | 2017-11-02 16:39:16 -0400 | [diff] [blame] | 658 | if (length < sizeof(struct lirc_scancode) || |
| 659 | length % sizeof(struct lirc_scancode)) |
| 660 | return -EINVAL; |
| 661 | |
| 662 | do { |
Sean Young | 7e45d66 | 2017-11-02 17:21:13 -0400 | [diff] [blame] | 663 | if (kfifo_is_empty(&fh->scancodes)) { |
Sean Young | 42e0442 | 2017-11-02 16:39:16 -0400 | [diff] [blame] | 664 | if (file->f_flags & O_NONBLOCK) |
| 665 | return -EAGAIN; |
| 666 | |
Sean Young | 7e45d66 | 2017-11-02 17:21:13 -0400 | [diff] [blame] | 667 | ret = wait_event_interruptible(fh->wait_poll, |
| 668 | !kfifo_is_empty(&fh->scancodes) || |
Sean Young | 42e0442 | 2017-11-02 16:39:16 -0400 | [diff] [blame] | 669 | !rcdev->registered); |
| 670 | if (ret) |
| 671 | return ret; |
| 672 | } |
| 673 | |
| 674 | if (!rcdev->registered) |
| 675 | return -ENODEV; |
| 676 | |
| 677 | ret = mutex_lock_interruptible(&rcdev->lock); |
| 678 | if (ret) |
| 679 | return ret; |
Sean Young | 7e45d66 | 2017-11-02 17:21:13 -0400 | [diff] [blame] | 680 | ret = kfifo_to_user(&fh->scancodes, buffer, length, &copied); |
Sean Young | 42e0442 | 2017-11-02 16:39:16 -0400 | [diff] [blame] | 681 | mutex_unlock(&rcdev->lock); |
| 682 | if (ret) |
| 683 | return ret; |
| 684 | } while (copied == 0); |
| 685 | |
| 686 | return copied; |
David Härdeman | 615cd3f | 2017-06-25 09:31:40 -0300 | [diff] [blame] | 687 | } |
David Härdeman | 615cd3f | 2017-06-25 09:31:40 -0300 | [diff] [blame] | 688 | |
Sean Young | 75992a4 | 2020-08-24 21:10:45 +0200 | [diff] [blame] | 689 | static ssize_t lirc_read(struct file *file, char __user *buffer, size_t length, |
| 690 | loff_t *ppos) |
Jarod Wilson | 4a62a5a | 2010-07-03 01:06:57 -0300 | [diff] [blame] | 691 | { |
Sean Young | 7e45d66 | 2017-11-02 17:21:13 -0400 | [diff] [blame] | 692 | struct lirc_fh *fh = file->private_data; |
| 693 | struct rc_dev *rcdev = fh->rc; |
David Härdeman | 615cd3f | 2017-06-25 09:31:40 -0300 | [diff] [blame] | 694 | |
Sean Young | 42e0442 | 2017-11-02 16:39:16 -0400 | [diff] [blame] | 695 | if (rcdev->driver_type == RC_DRIVER_IR_RAW_TX) |
| 696 | return -EINVAL; |
| 697 | |
| 698 | if (!rcdev->registered) |
| 699 | return -ENODEV; |
| 700 | |
Sean Young | 7e45d66 | 2017-11-02 17:21:13 -0400 | [diff] [blame] | 701 | if (fh->rec_mode == LIRC_MODE_MODE2) |
Sean Young | 75992a4 | 2020-08-24 21:10:45 +0200 | [diff] [blame] | 702 | return lirc_read_mode2(file, buffer, length); |
Sean Young | 42e0442 | 2017-11-02 16:39:16 -0400 | [diff] [blame] | 703 | else /* LIRC_MODE_SCANCODE */ |
Sean Young | 75992a4 | 2020-08-24 21:10:45 +0200 | [diff] [blame] | 704 | return lirc_read_scancode(file, buffer, length); |
Jarod Wilson | 4a62a5a | 2010-07-03 01:06:57 -0300 | [diff] [blame] | 705 | } |
Jarod Wilson | 4a62a5a | 2010-07-03 01:06:57 -0300 | [diff] [blame] | 706 | |
Sean Young | 42e0442 | 2017-11-02 16:39:16 -0400 | [diff] [blame] | 707 | static const struct file_operations lirc_fops = { |
| 708 | .owner = THIS_MODULE, |
Sean Young | 75992a4 | 2020-08-24 21:10:45 +0200 | [diff] [blame] | 709 | .write = lirc_transmit, |
| 710 | .unlocked_ioctl = lirc_ioctl, |
Arnd Bergmann | 1832f2d | 2018-09-11 21:59:08 +0200 | [diff] [blame] | 711 | .compat_ioctl = compat_ptr_ioctl, |
Sean Young | 75992a4 | 2020-08-24 21:10:45 +0200 | [diff] [blame] | 712 | .read = lirc_read, |
| 713 | .poll = lirc_poll, |
| 714 | .open = lirc_open, |
| 715 | .release = lirc_close, |
Sean Young | 42e0442 | 2017-11-02 16:39:16 -0400 | [diff] [blame] | 716 | .llseek = no_llseek, |
| 717 | }; |
Jarod Wilson | 4a62a5a | 2010-07-03 01:06:57 -0300 | [diff] [blame] | 718 | |
Jarod Wilson | 4a62a5a | 2010-07-03 01:06:57 -0300 | [diff] [blame] | 719 | static void lirc_release_device(struct device *ld) |
| 720 | { |
Sean Young | a6ddd4f | 2017-09-26 09:34:47 -0400 | [diff] [blame] | 721 | struct rc_dev *rcdev = container_of(ld, struct rc_dev, lirc_dev); |
Jarod Wilson | 4a62a5a | 2010-07-03 01:06:57 -0300 | [diff] [blame] | 722 | |
Sean Young | a6ddd4f | 2017-09-26 09:34:47 -0400 | [diff] [blame] | 723 | put_device(&rcdev->dev); |
Jarod Wilson | 4a62a5a | 2010-07-03 01:06:57 -0300 | [diff] [blame] | 724 | } |
| 725 | |
Sean Young | 75992a4 | 2020-08-24 21:10:45 +0200 | [diff] [blame] | 726 | int lirc_register(struct rc_dev *dev) |
Jarod Wilson | 4a62a5a | 2010-07-03 01:06:57 -0300 | [diff] [blame] | 727 | { |
Sean Young | ed8c34d | 2018-03-27 11:24:05 -0400 | [diff] [blame] | 728 | const char *rx_type, *tx_type; |
Sean Young | a6ddd4f | 2017-09-26 09:34:47 -0400 | [diff] [blame] | 729 | int err, minor; |
Jarod Wilson | 4a62a5a | 2010-07-03 01:06:57 -0300 | [diff] [blame] | 730 | |
Sean Young | 7e45d66 | 2017-11-02 17:21:13 -0400 | [diff] [blame] | 731 | minor = ida_simple_get(&lirc_ida, 0, RC_DEV_MAX, GFP_KERNEL); |
| 732 | if (minor < 0) |
| 733 | return minor; |
| 734 | |
Sean Young | a6ddd4f | 2017-09-26 09:34:47 -0400 | [diff] [blame] | 735 | device_initialize(&dev->lirc_dev); |
| 736 | dev->lirc_dev.class = lirc_class; |
Sean Young | a6ddd4f | 2017-09-26 09:34:47 -0400 | [diff] [blame] | 737 | dev->lirc_dev.parent = &dev->dev; |
Sean Young | 7e45d66 | 2017-11-02 17:21:13 -0400 | [diff] [blame] | 738 | dev->lirc_dev.release = lirc_release_device; |
Sean Young | a6ddd4f | 2017-09-26 09:34:47 -0400 | [diff] [blame] | 739 | dev->lirc_dev.devt = MKDEV(MAJOR(lirc_base_dev), minor); |
| 740 | dev_set_name(&dev->lirc_dev, "lirc%d", minor); |
Jarod Wilson | 4a62a5a | 2010-07-03 01:06:57 -0300 | [diff] [blame] | 741 | |
Sean Young | 7e45d66 | 2017-11-02 17:21:13 -0400 | [diff] [blame] | 742 | INIT_LIST_HEAD(&dev->lirc_fh); |
| 743 | spin_lock_init(&dev->lirc_fh_lock); |
| 744 | |
Sean Young | a6ddd4f | 2017-09-26 09:34:47 -0400 | [diff] [blame] | 745 | cdev_init(&dev->lirc_cdev, &lirc_fops); |
| 746 | |
| 747 | err = cdev_device_add(&dev->lirc_cdev, &dev->lirc_dev); |
| 748 | if (err) |
| 749 | goto out_ida; |
| 750 | |
| 751 | get_device(&dev->dev); |
| 752 | |
Sean Young | ed8c34d | 2018-03-27 11:24:05 -0400 | [diff] [blame] | 753 | switch (dev->driver_type) { |
| 754 | case RC_DRIVER_SCANCODE: |
| 755 | rx_type = "scancode"; |
| 756 | break; |
| 757 | case RC_DRIVER_IR_RAW: |
| 758 | rx_type = "raw IR"; |
| 759 | break; |
| 760 | default: |
| 761 | rx_type = "no"; |
| 762 | break; |
| 763 | } |
| 764 | |
| 765 | if (dev->tx_ir) |
| 766 | tx_type = "raw IR"; |
| 767 | else |
| 768 | tx_type = "no"; |
| 769 | |
| 770 | dev_info(&dev->dev, "lirc_dev: driver %s registered at minor = %d, %s receiver, %s transmitter", |
| 771 | dev->driver_name, minor, rx_type, tx_type); |
Jarod Wilson | 4a62a5a | 2010-07-03 01:06:57 -0300 | [diff] [blame] | 772 | |
| 773 | return 0; |
Sean Young | a6ddd4f | 2017-09-26 09:34:47 -0400 | [diff] [blame] | 774 | |
| 775 | out_ida: |
| 776 | ida_simple_remove(&lirc_ida, minor); |
Sean Young | a6ddd4f | 2017-09-26 09:34:47 -0400 | [diff] [blame] | 777 | return err; |
Jarod Wilson | 4a62a5a | 2010-07-03 01:06:57 -0300 | [diff] [blame] | 778 | } |
Jarod Wilson | 4a62a5a | 2010-07-03 01:06:57 -0300 | [diff] [blame] | 779 | |
Sean Young | 75992a4 | 2020-08-24 21:10:45 +0200 | [diff] [blame] | 780 | void lirc_unregister(struct rc_dev *dev) |
Jarod Wilson | 4a62a5a | 2010-07-03 01:06:57 -0300 | [diff] [blame] | 781 | { |
Sean Young | 7e45d66 | 2017-11-02 17:21:13 -0400 | [diff] [blame] | 782 | unsigned long flags; |
| 783 | struct lirc_fh *fh; |
| 784 | |
Sean Young | a6ddd4f | 2017-09-26 09:34:47 -0400 | [diff] [blame] | 785 | dev_dbg(&dev->dev, "lirc_dev: driver %s unregistered from minor = %d\n", |
| 786 | dev->driver_name, MINOR(dev->lirc_dev.devt)); |
Sean Young | 71695af | 2017-09-23 14:44:18 -0400 | [diff] [blame] | 787 | |
Sean Young | 7e45d66 | 2017-11-02 17:21:13 -0400 | [diff] [blame] | 788 | spin_lock_irqsave(&dev->lirc_fh_lock, flags); |
| 789 | list_for_each_entry(fh, &dev->lirc_fh, list) |
Linus Torvalds | a9a0884 | 2018-02-11 14:34:03 -0800 | [diff] [blame] | 790 | wake_up_poll(&fh->wait_poll, EPOLLHUP | EPOLLERR); |
Sean Young | 7e45d66 | 2017-11-02 17:21:13 -0400 | [diff] [blame] | 791 | spin_unlock_irqrestore(&dev->lirc_fh_lock, flags); |
Jarod Wilson | 4a62a5a | 2010-07-03 01:06:57 -0300 | [diff] [blame] | 792 | |
Sean Young | a6ddd4f | 2017-09-26 09:34:47 -0400 | [diff] [blame] | 793 | cdev_device_del(&dev->lirc_cdev, &dev->lirc_dev); |
| 794 | ida_simple_remove(&lirc_ida, MINOR(dev->lirc_dev.devt)); |
Jarod Wilson | 4a62a5a | 2010-07-03 01:06:57 -0300 | [diff] [blame] | 795 | } |
Jarod Wilson | 4a62a5a | 2010-07-03 01:06:57 -0300 | [diff] [blame] | 796 | |
Sean Young | a60d64b | 2017-09-23 10:41:13 -0400 | [diff] [blame] | 797 | int __init lirc_dev_init(void) |
Jarod Wilson | 4a62a5a | 2010-07-03 01:06:57 -0300 | [diff] [blame] | 798 | { |
| 799 | int retval; |
| 800 | |
| 801 | lirc_class = class_create(THIS_MODULE, "lirc"); |
| 802 | if (IS_ERR(lirc_class)) { |
Andi Shyti | 3fac031 | 2016-07-06 06:01:16 -0300 | [diff] [blame] | 803 | pr_err("class_create failed\n"); |
Andi Shyti | 54fceca | 2016-07-06 06:01:17 -0300 | [diff] [blame] | 804 | return PTR_ERR(lirc_class); |
Jarod Wilson | 4a62a5a | 2010-07-03 01:06:57 -0300 | [diff] [blame] | 805 | } |
| 806 | |
Sean Young | 32c3db3 | 2020-08-23 14:32:41 +0200 | [diff] [blame] | 807 | retval = alloc_chrdev_region(&lirc_base_dev, 0, RC_DEV_MAX, "lirc"); |
Jarod Wilson | 4a62a5a | 2010-07-03 01:06:57 -0300 | [diff] [blame] | 808 | if (retval) { |
| 809 | class_destroy(lirc_class); |
Andi Shyti | 3fac031 | 2016-07-06 06:01:16 -0300 | [diff] [blame] | 810 | pr_err("alloc_chrdev_region failed\n"); |
Andi Shyti | 54fceca | 2016-07-06 06:01:17 -0300 | [diff] [blame] | 811 | return retval; |
Jarod Wilson | 4a62a5a | 2010-07-03 01:06:57 -0300 | [diff] [blame] | 812 | } |
| 813 | |
Sean Young | 5817b3d | 2018-02-13 06:11:35 -0500 | [diff] [blame] | 814 | pr_debug("IR Remote Control driver registered, major %d\n", |
| 815 | MAJOR(lirc_base_dev)); |
Jarod Wilson | 4a62a5a | 2010-07-03 01:06:57 -0300 | [diff] [blame] | 816 | |
Andi Shyti | 54fceca | 2016-07-06 06:01:17 -0300 | [diff] [blame] | 817 | return 0; |
Jarod Wilson | 4a62a5a | 2010-07-03 01:06:57 -0300 | [diff] [blame] | 818 | } |
| 819 | |
Sean Young | a60d64b | 2017-09-23 10:41:13 -0400 | [diff] [blame] | 820 | void __exit lirc_dev_exit(void) |
Jarod Wilson | 4a62a5a | 2010-07-03 01:06:57 -0300 | [diff] [blame] | 821 | { |
| 822 | class_destroy(lirc_class); |
Sean Young | a6ddd4f | 2017-09-26 09:34:47 -0400 | [diff] [blame] | 823 | unregister_chrdev_region(lirc_base_dev, RC_DEV_MAX); |
Jarod Wilson | 4a62a5a | 2010-07-03 01:06:57 -0300 | [diff] [blame] | 824 | } |
| 825 | |
Sean Young | f4364dc | 2018-05-27 12:24:09 +0100 | [diff] [blame] | 826 | struct rc_dev *rc_dev_get_from_fd(int fd) |
| 827 | { |
| 828 | struct fd f = fdget(fd); |
| 829 | struct lirc_fh *fh; |
| 830 | struct rc_dev *dev; |
| 831 | |
| 832 | if (!f.file) |
| 833 | return ERR_PTR(-EBADF); |
| 834 | |
| 835 | if (f.file->f_op != &lirc_fops) { |
| 836 | fdput(f); |
| 837 | return ERR_PTR(-EINVAL); |
| 838 | } |
| 839 | |
| 840 | fh = f.file->private_data; |
| 841 | dev = fh->rc; |
| 842 | |
| 843 | get_device(&dev->dev); |
| 844 | fdput(f); |
| 845 | |
| 846 | return dev; |
| 847 | } |
| 848 | |
Sean Young | 04d0e8d | 2017-12-28 14:45:12 -0500 | [diff] [blame] | 849 | MODULE_ALIAS("lirc_dev"); |