Jonathan Cameron | 847ec80 | 2009-08-18 18:06:19 +0100 | [diff] [blame] | 1 | /* The industrial I/O core |
| 2 | * |
| 3 | * Copyright (c) 2008 Jonathan Cameron |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of the GNU General Public License version 2 as published by |
| 7 | * the Free Software Foundation. |
| 8 | * |
| 9 | * Based on elements of hwmon and input subsystems. |
| 10 | */ |
| 11 | |
| 12 | #include <linux/kernel.h> |
| 13 | #include <linux/module.h> |
| 14 | #include <linux/idr.h> |
| 15 | #include <linux/kdev_t.h> |
| 16 | #include <linux/err.h> |
| 17 | #include <linux/device.h> |
| 18 | #include <linux/fs.h> |
Jonathan Cameron | 847ec80 | 2009-08-18 18:06:19 +0100 | [diff] [blame] | 19 | #include <linux/poll.h> |
Jonathan Cameron | ffc18af | 2009-10-12 19:18:09 +0100 | [diff] [blame] | 20 | #include <linux/sched.h> |
Jeff Mahoney | 4439c93 | 2009-10-12 17:10:34 -0400 | [diff] [blame] | 21 | #include <linux/wait.h> |
Jonathan Cameron | 847ec80 | 2009-08-18 18:06:19 +0100 | [diff] [blame] | 22 | #include <linux/cdev.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 23 | #include <linux/slab.h> |
Jonathan Cameron | 8e7d967 | 2011-08-30 12:32:45 +0100 | [diff] [blame] | 24 | #include <linux/anon_inodes.h> |
Jonathan Cameron | 847ec80 | 2009-08-18 18:06:19 +0100 | [diff] [blame] | 25 | #include "iio.h" |
Jonathan Cameron | df9c1c4 | 2011-08-12 17:56:03 +0100 | [diff] [blame] | 26 | #include "iio_core.h" |
Jonathan Cameron | 6aea1c3 | 2011-08-24 17:28:38 +0100 | [diff] [blame] | 27 | #include "iio_core_trigger.h" |
Jonathan Cameron | 9dd1cb3 | 2011-08-30 12:41:15 +0100 | [diff] [blame] | 28 | #include "sysfs.h" |
Jonathan Cameron | af5046a | 2011-10-26 17:41:32 +0100 | [diff] [blame^] | 29 | #include "events.h" |
Jonathan Cameron | 9dd1cb3 | 2011-08-30 12:41:15 +0100 | [diff] [blame] | 30 | |
Jonathan Cameron | 47c24fd | 2011-08-30 12:41:07 +0100 | [diff] [blame] | 31 | /* IDA to assign each registered device a unique id*/ |
Jonathan Cameron | b156cf7 | 2010-09-04 17:54:43 +0100 | [diff] [blame] | 32 | static DEFINE_IDA(iio_ida); |
Jonathan Cameron | 847ec80 | 2009-08-18 18:06:19 +0100 | [diff] [blame] | 33 | |
Jonathan Cameron | f625cb9 | 2011-08-30 12:32:48 +0100 | [diff] [blame] | 34 | static dev_t iio_devt; |
Jonathan Cameron | 847ec80 | 2009-08-18 18:06:19 +0100 | [diff] [blame] | 35 | |
| 36 | #define IIO_DEV_MAX 256 |
Jonathan Cameron | 5aaaeba | 2010-05-04 14:43:00 +0100 | [diff] [blame] | 37 | struct bus_type iio_bus_type = { |
Jonathan Cameron | 847ec80 | 2009-08-18 18:06:19 +0100 | [diff] [blame] | 38 | .name = "iio", |
Jonathan Cameron | 847ec80 | 2009-08-18 18:06:19 +0100 | [diff] [blame] | 39 | }; |
Jonathan Cameron | 5aaaeba | 2010-05-04 14:43:00 +0100 | [diff] [blame] | 40 | EXPORT_SYMBOL(iio_bus_type); |
Jonathan Cameron | 847ec80 | 2009-08-18 18:06:19 +0100 | [diff] [blame] | 41 | |
Jonathan Cameron | 1e8dfcc | 2011-08-30 12:41:11 +0100 | [diff] [blame] | 42 | static const char * const iio_data_type_name[] = { |
| 43 | [IIO_RAW] = "raw", |
| 44 | [IIO_PROCESSED] = "input", |
| 45 | }; |
| 46 | |
Jonathan Cameron | c6fc806 | 2011-09-02 17:14:34 +0100 | [diff] [blame] | 47 | static const char * const iio_direction[] = { |
| 48 | [0] = "in", |
| 49 | [1] = "out", |
| 50 | }; |
| 51 | |
Jonathan Cameron | ade7ef7 | 2011-09-02 17:14:45 +0100 | [diff] [blame] | 52 | static const char * const iio_chan_type_name_spec[] = { |
Jonathan Cameron | c6fc806 | 2011-09-02 17:14:34 +0100 | [diff] [blame] | 53 | [IIO_VOLTAGE] = "voltage", |
Michael Hennerich | faf290e | 2011-05-18 14:42:02 +0100 | [diff] [blame] | 54 | [IIO_CURRENT] = "current", |
| 55 | [IIO_POWER] = "power", |
Bryan Freed | 9bff02f | 2011-07-07 12:01:54 -0700 | [diff] [blame] | 56 | [IIO_ACCEL] = "accel", |
Jonathan Cameron | 41ea040 | 2011-10-05 15:27:59 +0100 | [diff] [blame] | 57 | [IIO_ANGL_VEL] = "anglvel", |
Jonathan Cameron | 1d89271 | 2011-05-18 14:40:51 +0100 | [diff] [blame] | 58 | [IIO_MAGN] = "magn", |
Bryan Freed | 9bff02f | 2011-07-07 12:01:54 -0700 | [diff] [blame] | 59 | [IIO_LIGHT] = "illuminance", |
| 60 | [IIO_INTENSITY] = "intensity", |
Bryan Freed | f09f2c8 | 2011-07-07 12:01:55 -0700 | [diff] [blame] | 61 | [IIO_PROXIMITY] = "proximity", |
Bryan Freed | 9bff02f | 2011-07-07 12:01:54 -0700 | [diff] [blame] | 62 | [IIO_TEMP] = "temp", |
Jonathan Cameron | 1d89271 | 2011-05-18 14:40:51 +0100 | [diff] [blame] | 63 | [IIO_INCLI] = "incli", |
| 64 | [IIO_ROT] = "rot", |
Jonathan Cameron | 1d89271 | 2011-05-18 14:40:51 +0100 | [diff] [blame] | 65 | [IIO_ANGL] = "angl", |
Bryan Freed | 9bff02f | 2011-07-07 12:01:54 -0700 | [diff] [blame] | 66 | [IIO_TIMESTAMP] = "timestamp", |
Jonathan Cameron | 66dbe70 | 2011-09-02 17:14:43 +0100 | [diff] [blame] | 67 | [IIO_CAPACITANCE] = "capacitance", |
Jonathan Cameron | 1d89271 | 2011-05-18 14:40:51 +0100 | [diff] [blame] | 68 | }; |
| 69 | |
Jonathan Cameron | 330c6c5 | 2011-09-02 17:14:39 +0100 | [diff] [blame] | 70 | static const char * const iio_modifier_names[] = { |
Jonathan Cameron | 1d89271 | 2011-05-18 14:40:51 +0100 | [diff] [blame] | 71 | [IIO_MOD_X] = "x", |
| 72 | [IIO_MOD_Y] = "y", |
| 73 | [IIO_MOD_Z] = "z", |
Jonathan Cameron | 330c6c5 | 2011-09-02 17:14:39 +0100 | [diff] [blame] | 74 | [IIO_MOD_LIGHT_BOTH] = "both", |
| 75 | [IIO_MOD_LIGHT_IR] = "ir", |
Jonathan Cameron | 1d89271 | 2011-05-18 14:40:51 +0100 | [diff] [blame] | 76 | }; |
| 77 | |
| 78 | /* relies on pairs of these shared then separate */ |
| 79 | static const char * const iio_chan_info_postfix[] = { |
| 80 | [IIO_CHAN_INFO_SCALE_SHARED/2] = "scale", |
| 81 | [IIO_CHAN_INFO_OFFSET_SHARED/2] = "offset", |
| 82 | [IIO_CHAN_INFO_CALIBSCALE_SHARED/2] = "calibscale", |
| 83 | [IIO_CHAN_INFO_CALIBBIAS_SHARED/2] = "calibbias", |
Jonathan Cameron | eb7fea5 | 2011-05-18 14:41:57 +0100 | [diff] [blame] | 84 | [IIO_CHAN_INFO_PEAK_SHARED/2] = "peak_raw", |
| 85 | [IIO_CHAN_INFO_PEAK_SCALE_SHARED/2] = "peak_scale", |
Jonathan Cameron | 7d43817 | 2011-08-12 17:47:53 +0100 | [diff] [blame] | 86 | [IIO_CHAN_INFO_QUADRATURE_CORRECTION_RAW_SHARED/2] |
| 87 | = "quadrature_correction_raw", |
Jonathan Cameron | 66dbe70 | 2011-09-02 17:14:43 +0100 | [diff] [blame] | 88 | [IIO_CHAN_INFO_AVERAGE_RAW_SHARED/2] = "mean_raw", |
Jonathan Cameron | 1d89271 | 2011-05-18 14:40:51 +0100 | [diff] [blame] | 89 | }; |
| 90 | |
Jonathan Cameron | 7ae8cf6 | 2011-08-30 12:32:44 +0100 | [diff] [blame] | 91 | /** |
| 92 | * struct iio_detected_event_list - list element for events that have occurred |
| 93 | * @list: linked list header |
| 94 | * @ev: the event itself |
| 95 | */ |
| 96 | struct iio_detected_event_list { |
| 97 | struct list_head list; |
| 98 | struct iio_event_data ev; |
| 99 | }; |
| 100 | |
| 101 | /** |
| 102 | * struct iio_event_interface - chrdev interface for an event line |
| 103 | * @dev: device assocated with event interface |
Jonathan Cameron | 7ae8cf6 | 2011-08-30 12:32:44 +0100 | [diff] [blame] | 104 | * @wait: wait queue to allow blocking reads of events |
| 105 | * @event_list_lock: mutex to protect the list of detected events |
| 106 | * @det_events: list of detected events |
| 107 | * @max_events: maximum number of events before new ones are dropped |
| 108 | * @current_events: number of events in detected list |
Jonathan Cameron | 6356463 | 2011-08-30 12:32:46 +0100 | [diff] [blame] | 109 | * @flags: file operations related flags including busy flag. |
Jonathan Cameron | 7ae8cf6 | 2011-08-30 12:32:44 +0100 | [diff] [blame] | 110 | */ |
| 111 | struct iio_event_interface { |
Jonathan Cameron | 7ae8cf6 | 2011-08-30 12:32:44 +0100 | [diff] [blame] | 112 | wait_queue_head_t wait; |
| 113 | struct mutex event_list_lock; |
| 114 | struct list_head det_events; |
| 115 | int max_events; |
| 116 | int current_events; |
| 117 | struct list_head dev_attr_list; |
Jonathan Cameron | 6356463 | 2011-08-30 12:32:46 +0100 | [diff] [blame] | 118 | unsigned long flags; |
Jonathan Cameron | 26d25ae | 2011-09-02 17:14:40 +0100 | [diff] [blame] | 119 | struct attribute_group group; |
Jonathan Cameron | 7ae8cf6 | 2011-08-30 12:32:44 +0100 | [diff] [blame] | 120 | }; |
| 121 | |
Jonathan Cameron | f8c6f4e | 2011-10-06 17:14:35 +0100 | [diff] [blame] | 122 | int iio_push_event(struct iio_dev *indio_dev, u64 ev_code, s64 timestamp) |
Jonathan Cameron | 847ec80 | 2009-08-18 18:06:19 +0100 | [diff] [blame] | 123 | { |
Jonathan Cameron | f8c6f4e | 2011-10-06 17:14:35 +0100 | [diff] [blame] | 124 | struct iio_event_interface *ev_int = indio_dev->event_interface; |
Jonathan Cameron | 847ec80 | 2009-08-18 18:06:19 +0100 | [diff] [blame] | 125 | struct iio_detected_event_list *ev; |
| 126 | int ret = 0; |
| 127 | |
| 128 | /* Does anyone care? */ |
| 129 | mutex_lock(&ev_int->event_list_lock); |
Jonathan Cameron | 6356463 | 2011-08-30 12:32:46 +0100 | [diff] [blame] | 130 | if (test_bit(IIO_BUSY_BIT_POS, &ev_int->flags)) { |
Jonathan Cameron | 75c8075 | 2010-01-09 16:57:34 +0000 | [diff] [blame] | 131 | if (ev_int->current_events == ev_int->max_events) { |
| 132 | mutex_unlock(&ev_int->event_list_lock); |
Jonathan Cameron | 847ec80 | 2009-08-18 18:06:19 +0100 | [diff] [blame] | 133 | return 0; |
Jonathan Cameron | 75c8075 | 2010-01-09 16:57:34 +0000 | [diff] [blame] | 134 | } |
Jonathan Cameron | 847ec80 | 2009-08-18 18:06:19 +0100 | [diff] [blame] | 135 | ev = kmalloc(sizeof(*ev), GFP_KERNEL); |
| 136 | if (ev == NULL) { |
| 137 | ret = -ENOMEM; |
Jonathan Cameron | 75c8075 | 2010-01-09 16:57:34 +0000 | [diff] [blame] | 138 | mutex_unlock(&ev_int->event_list_lock); |
Jonathan Cameron | 847ec80 | 2009-08-18 18:06:19 +0100 | [diff] [blame] | 139 | goto error_ret; |
| 140 | } |
| 141 | ev->ev.id = ev_code; |
| 142 | ev->ev.timestamp = timestamp; |
Jonathan Cameron | 847ec80 | 2009-08-18 18:06:19 +0100 | [diff] [blame] | 143 | |
Jonathan Cameron | 3b8ebfb | 2011-05-18 14:42:21 +0100 | [diff] [blame] | 144 | list_add_tail(&ev->list, &ev_int->det_events); |
Jonathan Cameron | 847ec80 | 2009-08-18 18:06:19 +0100 | [diff] [blame] | 145 | ev_int->current_events++; |
| 146 | mutex_unlock(&ev_int->event_list_lock); |
| 147 | wake_up_interruptible(&ev_int->wait); |
| 148 | } else |
| 149 | mutex_unlock(&ev_int->event_list_lock); |
| 150 | |
| 151 | error_ret: |
| 152 | return ret; |
| 153 | } |
Jonathan Cameron | 847ec80 | 2009-08-18 18:06:19 +0100 | [diff] [blame] | 154 | EXPORT_SYMBOL(iio_push_event); |
| 155 | |
Jonathan Cameron | 847ec80 | 2009-08-18 18:06:19 +0100 | [diff] [blame] | 156 | /* This turns up an awful lot */ |
| 157 | ssize_t iio_read_const_attr(struct device *dev, |
| 158 | struct device_attribute *attr, |
| 159 | char *buf) |
| 160 | { |
| 161 | return sprintf(buf, "%s\n", to_iio_const_attr(attr)->string); |
| 162 | } |
| 163 | EXPORT_SYMBOL(iio_read_const_attr); |
| 164 | |
Mark Brown | 77712e5 | 2010-02-18 17:19:17 +0000 | [diff] [blame] | 165 | static ssize_t iio_event_chrdev_read(struct file *filep, |
| 166 | char __user *buf, |
| 167 | size_t count, |
| 168 | loff_t *f_ps) |
Jonathan Cameron | 847ec80 | 2009-08-18 18:06:19 +0100 | [diff] [blame] | 169 | { |
| 170 | struct iio_event_interface *ev_int = filep->private_data; |
| 171 | struct iio_detected_event_list *el; |
Lars-Peter Clausen | dc8f526 | 2011-10-26 17:27:43 +0100 | [diff] [blame] | 172 | size_t len = sizeof(el->ev); |
Jonathan Cameron | 847ec80 | 2009-08-18 18:06:19 +0100 | [diff] [blame] | 173 | int ret; |
Lars-Peter Clausen | dc8f526 | 2011-10-26 17:27:43 +0100 | [diff] [blame] | 174 | |
| 175 | if (count < len) |
| 176 | return -EINVAL; |
Jonathan Cameron | 6356463 | 2011-08-30 12:32:46 +0100 | [diff] [blame] | 177 | |
Jonathan Cameron | 847ec80 | 2009-08-18 18:06:19 +0100 | [diff] [blame] | 178 | mutex_lock(&ev_int->event_list_lock); |
Jonathan Cameron | 3b8ebfb | 2011-05-18 14:42:21 +0100 | [diff] [blame] | 179 | if (list_empty(&ev_int->det_events)) { |
Jonathan Cameron | 847ec80 | 2009-08-18 18:06:19 +0100 | [diff] [blame] | 180 | if (filep->f_flags & O_NONBLOCK) { |
| 181 | ret = -EAGAIN; |
| 182 | goto error_mutex_unlock; |
| 183 | } |
| 184 | mutex_unlock(&ev_int->event_list_lock); |
| 185 | /* Blocking on device; waiting for something to be there */ |
| 186 | ret = wait_event_interruptible(ev_int->wait, |
| 187 | !list_empty(&ev_int |
Jonathan Cameron | 3b8ebfb | 2011-05-18 14:42:21 +0100 | [diff] [blame] | 188 | ->det_events)); |
Jonathan Cameron | 847ec80 | 2009-08-18 18:06:19 +0100 | [diff] [blame] | 189 | if (ret) |
| 190 | goto error_ret; |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 191 | /* Single access device so no one else can get the data */ |
Jonathan Cameron | 847ec80 | 2009-08-18 18:06:19 +0100 | [diff] [blame] | 192 | mutex_lock(&ev_int->event_list_lock); |
| 193 | } |
| 194 | |
Jonathan Cameron | 3b8ebfb | 2011-05-18 14:42:21 +0100 | [diff] [blame] | 195 | el = list_first_entry(&ev_int->det_events, |
Jonathan Cameron | 847ec80 | 2009-08-18 18:06:19 +0100 | [diff] [blame] | 196 | struct iio_detected_event_list, |
| 197 | list); |
Jonathan Cameron | 847ec80 | 2009-08-18 18:06:19 +0100 | [diff] [blame] | 198 | if (copy_to_user(buf, &(el->ev), len)) { |
| 199 | ret = -EFAULT; |
| 200 | goto error_mutex_unlock; |
| 201 | } |
| 202 | list_del(&el->list); |
| 203 | ev_int->current_events--; |
| 204 | mutex_unlock(&ev_int->event_list_lock); |
Jonathan Cameron | 847ec80 | 2009-08-18 18:06:19 +0100 | [diff] [blame] | 205 | kfree(el); |
| 206 | |
| 207 | return len; |
| 208 | |
| 209 | error_mutex_unlock: |
| 210 | mutex_unlock(&ev_int->event_list_lock); |
| 211 | error_ret: |
| 212 | |
| 213 | return ret; |
| 214 | } |
| 215 | |
Mark Brown | 77712e5 | 2010-02-18 17:19:17 +0000 | [diff] [blame] | 216 | static int iio_event_chrdev_release(struct inode *inode, struct file *filep) |
Jonathan Cameron | 847ec80 | 2009-08-18 18:06:19 +0100 | [diff] [blame] | 217 | { |
Jonathan Cameron | 8e7d967 | 2011-08-30 12:32:45 +0100 | [diff] [blame] | 218 | struct iio_event_interface *ev_int = filep->private_data; |
Jonathan Cameron | 847ec80 | 2009-08-18 18:06:19 +0100 | [diff] [blame] | 219 | struct iio_detected_event_list *el, *t; |
Jonathan Cameron | 6356463 | 2011-08-30 12:32:46 +0100 | [diff] [blame] | 220 | |
Jonathan Cameron | 847ec80 | 2009-08-18 18:06:19 +0100 | [diff] [blame] | 221 | mutex_lock(&ev_int->event_list_lock); |
Jonathan Cameron | 6356463 | 2011-08-30 12:32:46 +0100 | [diff] [blame] | 222 | clear_bit(IIO_BUSY_BIT_POS, &ev_int->flags); |
Jonathan Cameron | 847ec80 | 2009-08-18 18:06:19 +0100 | [diff] [blame] | 223 | /* |
| 224 | * In order to maintain a clean state for reopening, |
| 225 | * clear out any awaiting events. The mask will prevent |
| 226 | * any new __iio_push_event calls running. |
| 227 | */ |
Jonathan Cameron | 3b8ebfb | 2011-05-18 14:42:21 +0100 | [diff] [blame] | 228 | list_for_each_entry_safe(el, t, &ev_int->det_events, list) { |
Jonathan Cameron | 847ec80 | 2009-08-18 18:06:19 +0100 | [diff] [blame] | 229 | list_del(&el->list); |
| 230 | kfree(el); |
| 231 | } |
Jonathan Cameron | 8e7d967 | 2011-08-30 12:32:45 +0100 | [diff] [blame] | 232 | ev_int->current_events = 0; |
Jonathan Cameron | 847ec80 | 2009-08-18 18:06:19 +0100 | [diff] [blame] | 233 | mutex_unlock(&ev_int->event_list_lock); |
| 234 | |
| 235 | return 0; |
| 236 | } |
| 237 | |
| 238 | static const struct file_operations iio_event_chrdev_fileops = { |
| 239 | .read = iio_event_chrdev_read, |
| 240 | .release = iio_event_chrdev_release, |
Jonathan Cameron | 847ec80 | 2009-08-18 18:06:19 +0100 | [diff] [blame] | 241 | .owner = THIS_MODULE, |
Arnd Bergmann | 6038f37 | 2010-08-15 18:52:59 +0200 | [diff] [blame] | 242 | .llseek = noop_llseek, |
Jonathan Cameron | 847ec80 | 2009-08-18 18:06:19 +0100 | [diff] [blame] | 243 | }; |
| 244 | |
Jonathan Cameron | 1aa0427 | 2011-08-30 12:32:47 +0100 | [diff] [blame] | 245 | static int iio_event_getfd(struct iio_dev *indio_dev) |
Jonathan Cameron | 8e7d967 | 2011-08-30 12:32:45 +0100 | [diff] [blame] | 246 | { |
Al Viro | b464133 | 2011-11-21 17:25:37 -0500 | [diff] [blame] | 247 | int fd; |
| 248 | |
Jonathan Cameron | 5aa9618 | 2011-08-30 12:41:06 +0100 | [diff] [blame] | 249 | if (indio_dev->event_interface == NULL) |
Jonathan Cameron | 8e7d967 | 2011-08-30 12:32:45 +0100 | [diff] [blame] | 250 | return -ENODEV; |
| 251 | |
Jonathan Cameron | 5aa9618 | 2011-08-30 12:41:06 +0100 | [diff] [blame] | 252 | mutex_lock(&indio_dev->event_interface->event_list_lock); |
Jonathan Cameron | 8e7d967 | 2011-08-30 12:32:45 +0100 | [diff] [blame] | 253 | if (test_and_set_bit(IIO_BUSY_BIT_POS, |
Jonathan Cameron | 5aa9618 | 2011-08-30 12:41:06 +0100 | [diff] [blame] | 254 | &indio_dev->event_interface->flags)) { |
| 255 | mutex_unlock(&indio_dev->event_interface->event_list_lock); |
Jonathan Cameron | 8e7d967 | 2011-08-30 12:32:45 +0100 | [diff] [blame] | 256 | return -EBUSY; |
| 257 | } |
Jonathan Cameron | 5aa9618 | 2011-08-30 12:41:06 +0100 | [diff] [blame] | 258 | mutex_unlock(&indio_dev->event_interface->event_list_lock); |
Al Viro | b464133 | 2011-11-21 17:25:37 -0500 | [diff] [blame] | 259 | fd = anon_inode_getfd("iio:event", |
Jonathan Cameron | 8e7d967 | 2011-08-30 12:32:45 +0100 | [diff] [blame] | 260 | &iio_event_chrdev_fileops, |
Jonathan Cameron | 5aa9618 | 2011-08-30 12:41:06 +0100 | [diff] [blame] | 261 | indio_dev->event_interface, O_RDONLY); |
Al Viro | b464133 | 2011-11-21 17:25:37 -0500 | [diff] [blame] | 262 | if (fd < 0) { |
| 263 | mutex_lock(&indio_dev->event_interface->event_list_lock); |
Greg Kroah-Hartman | f791cec | 2011-11-26 16:31:16 -0800 | [diff] [blame] | 264 | clear_bit(IIO_BUSY_BIT_POS, &indio_dev->event_interface->flags); |
Al Viro | b464133 | 2011-11-21 17:25:37 -0500 | [diff] [blame] | 265 | mutex_unlock(&indio_dev->event_interface->event_list_lock); |
| 266 | } |
| 267 | return fd; |
Jonathan Cameron | 8e7d967 | 2011-08-30 12:32:45 +0100 | [diff] [blame] | 268 | } |
| 269 | |
Jonathan Cameron | 847ec80 | 2009-08-18 18:06:19 +0100 | [diff] [blame] | 270 | static int __init iio_init(void) |
| 271 | { |
| 272 | int ret; |
| 273 | |
Jonathan Cameron | 5aaaeba | 2010-05-04 14:43:00 +0100 | [diff] [blame] | 274 | /* Register sysfs bus */ |
| 275 | ret = bus_register(&iio_bus_type); |
Jonathan Cameron | 847ec80 | 2009-08-18 18:06:19 +0100 | [diff] [blame] | 276 | if (ret < 0) { |
| 277 | printk(KERN_ERR |
Jonathan Cameron | 5aaaeba | 2010-05-04 14:43:00 +0100 | [diff] [blame] | 278 | "%s could not register bus type\n", |
Jonathan Cameron | 847ec80 | 2009-08-18 18:06:19 +0100 | [diff] [blame] | 279 | __FILE__); |
| 280 | goto error_nothing; |
| 281 | } |
| 282 | |
Jonathan Cameron | 9aa1a16 | 2011-08-12 17:08:50 +0100 | [diff] [blame] | 283 | ret = alloc_chrdev_region(&iio_devt, 0, IIO_DEV_MAX, "iio"); |
| 284 | if (ret < 0) { |
| 285 | printk(KERN_ERR "%s: failed to allocate char dev region\n", |
| 286 | __FILE__); |
Jonathan Cameron | 5aaaeba | 2010-05-04 14:43:00 +0100 | [diff] [blame] | 287 | goto error_unregister_bus_type; |
Jonathan Cameron | 9aa1a16 | 2011-08-12 17:08:50 +0100 | [diff] [blame] | 288 | } |
Jonathan Cameron | 847ec80 | 2009-08-18 18:06:19 +0100 | [diff] [blame] | 289 | |
| 290 | return 0; |
| 291 | |
Jonathan Cameron | 5aaaeba | 2010-05-04 14:43:00 +0100 | [diff] [blame] | 292 | error_unregister_bus_type: |
| 293 | bus_unregister(&iio_bus_type); |
Jonathan Cameron | 847ec80 | 2009-08-18 18:06:19 +0100 | [diff] [blame] | 294 | error_nothing: |
| 295 | return ret; |
| 296 | } |
| 297 | |
| 298 | static void __exit iio_exit(void) |
| 299 | { |
Jonathan Cameron | 9aa1a16 | 2011-08-12 17:08:50 +0100 | [diff] [blame] | 300 | if (iio_devt) |
| 301 | unregister_chrdev_region(iio_devt, IIO_DEV_MAX); |
Jonathan Cameron | 5aaaeba | 2010-05-04 14:43:00 +0100 | [diff] [blame] | 302 | bus_unregister(&iio_bus_type); |
Jonathan Cameron | 847ec80 | 2009-08-18 18:06:19 +0100 | [diff] [blame] | 303 | } |
| 304 | |
Jonathan Cameron | 1d89271 | 2011-05-18 14:40:51 +0100 | [diff] [blame] | 305 | static ssize_t iio_read_channel_info(struct device *dev, |
| 306 | struct device_attribute *attr, |
| 307 | char *buf) |
Jonathan Cameron | 847ec80 | 2009-08-18 18:06:19 +0100 | [diff] [blame] | 308 | { |
Jonathan Cameron | 1d89271 | 2011-05-18 14:40:51 +0100 | [diff] [blame] | 309 | struct iio_dev *indio_dev = dev_get_drvdata(dev); |
| 310 | struct iio_dev_attr *this_attr = to_iio_dev_attr(attr); |
| 311 | int val, val2; |
Jonathan Cameron | 6fe8135 | 2011-05-18 14:42:37 +0100 | [diff] [blame] | 312 | int ret = indio_dev->info->read_raw(indio_dev, this_attr->c, |
| 313 | &val, &val2, this_attr->address); |
Jonathan Cameron | 847ec80 | 2009-08-18 18:06:19 +0100 | [diff] [blame] | 314 | |
Jonathan Cameron | 1d89271 | 2011-05-18 14:40:51 +0100 | [diff] [blame] | 315 | if (ret < 0) |
| 316 | return ret; |
| 317 | |
| 318 | if (ret == IIO_VAL_INT) |
| 319 | return sprintf(buf, "%d\n", val); |
| 320 | else if (ret == IIO_VAL_INT_PLUS_MICRO) { |
| 321 | if (val2 < 0) |
| 322 | return sprintf(buf, "-%d.%06u\n", val, -val2); |
| 323 | else |
| 324 | return sprintf(buf, "%d.%06u\n", val, val2); |
Michael Hennerich | 71646e2 | 2011-06-27 13:07:07 +0100 | [diff] [blame] | 325 | } else if (ret == IIO_VAL_INT_PLUS_NANO) { |
| 326 | if (val2 < 0) |
| 327 | return sprintf(buf, "-%d.%09u\n", val, -val2); |
| 328 | else |
| 329 | return sprintf(buf, "%d.%09u\n", val, val2); |
Jonathan Cameron | 1d89271 | 2011-05-18 14:40:51 +0100 | [diff] [blame] | 330 | } else |
| 331 | return 0; |
| 332 | } |
| 333 | |
| 334 | static ssize_t iio_write_channel_info(struct device *dev, |
| 335 | struct device_attribute *attr, |
| 336 | const char *buf, |
| 337 | size_t len) |
| 338 | { |
| 339 | struct iio_dev *indio_dev = dev_get_drvdata(dev); |
| 340 | struct iio_dev_attr *this_attr = to_iio_dev_attr(attr); |
Michael Hennerich | 5c04af0 | 2011-06-27 13:07:10 +0100 | [diff] [blame] | 341 | int ret, integer = 0, fract = 0, fract_mult = 100000; |
Jonathan Cameron | 1d89271 | 2011-05-18 14:40:51 +0100 | [diff] [blame] | 342 | bool integer_part = true, negative = false; |
| 343 | |
| 344 | /* Assumes decimal - precision based on number of digits */ |
Jonathan Cameron | 6fe8135 | 2011-05-18 14:42:37 +0100 | [diff] [blame] | 345 | if (!indio_dev->info->write_raw) |
Jonathan Cameron | 1d89271 | 2011-05-18 14:40:51 +0100 | [diff] [blame] | 346 | return -EINVAL; |
Michael Hennerich | 5c04af0 | 2011-06-27 13:07:10 +0100 | [diff] [blame] | 347 | |
| 348 | if (indio_dev->info->write_raw_get_fmt) |
| 349 | switch (indio_dev->info->write_raw_get_fmt(indio_dev, |
| 350 | this_attr->c, this_attr->address)) { |
| 351 | case IIO_VAL_INT_PLUS_MICRO: |
| 352 | fract_mult = 100000; |
| 353 | break; |
| 354 | case IIO_VAL_INT_PLUS_NANO: |
| 355 | fract_mult = 100000000; |
| 356 | break; |
| 357 | default: |
| 358 | return -EINVAL; |
| 359 | } |
| 360 | |
Jonathan Cameron | 1d89271 | 2011-05-18 14:40:51 +0100 | [diff] [blame] | 361 | if (buf[0] == '-') { |
| 362 | negative = true; |
| 363 | buf++; |
| 364 | } |
Michael Hennerich | 5c04af0 | 2011-06-27 13:07:10 +0100 | [diff] [blame] | 365 | |
Jonathan Cameron | 1d89271 | 2011-05-18 14:40:51 +0100 | [diff] [blame] | 366 | while (*buf) { |
| 367 | if ('0' <= *buf && *buf <= '9') { |
| 368 | if (integer_part) |
| 369 | integer = integer*10 + *buf - '0'; |
| 370 | else { |
Michael Hennerich | 5c04af0 | 2011-06-27 13:07:10 +0100 | [diff] [blame] | 371 | fract += fract_mult*(*buf - '0'); |
| 372 | if (fract_mult == 1) |
Jonathan Cameron | 1d89271 | 2011-05-18 14:40:51 +0100 | [diff] [blame] | 373 | break; |
Michael Hennerich | 5c04af0 | 2011-06-27 13:07:10 +0100 | [diff] [blame] | 374 | fract_mult /= 10; |
Jonathan Cameron | 1d89271 | 2011-05-18 14:40:51 +0100 | [diff] [blame] | 375 | } |
| 376 | } else if (*buf == '\n') { |
| 377 | if (*(buf + 1) == '\0') |
| 378 | break; |
| 379 | else |
| 380 | return -EINVAL; |
| 381 | } else if (*buf == '.') { |
| 382 | integer_part = false; |
| 383 | } else { |
| 384 | return -EINVAL; |
| 385 | } |
| 386 | buf++; |
| 387 | } |
| 388 | if (negative) { |
| 389 | if (integer) |
| 390 | integer = -integer; |
| 391 | else |
Michael Hennerich | 5c04af0 | 2011-06-27 13:07:10 +0100 | [diff] [blame] | 392 | fract = -fract; |
Jonathan Cameron | 847ec80 | 2009-08-18 18:06:19 +0100 | [diff] [blame] | 393 | } |
| 394 | |
Jonathan Cameron | 6fe8135 | 2011-05-18 14:42:37 +0100 | [diff] [blame] | 395 | ret = indio_dev->info->write_raw(indio_dev, this_attr->c, |
Michael Hennerich | 5c04af0 | 2011-06-27 13:07:10 +0100 | [diff] [blame] | 396 | integer, fract, this_attr->address); |
Jonathan Cameron | 1d89271 | 2011-05-18 14:40:51 +0100 | [diff] [blame] | 397 | if (ret) |
| 398 | return ret; |
| 399 | |
| 400 | return len; |
| 401 | } |
| 402 | |
Jonathan Cameron | df9c1c4 | 2011-08-12 17:56:03 +0100 | [diff] [blame] | 403 | static |
Jonathan Cameron | 1d89271 | 2011-05-18 14:40:51 +0100 | [diff] [blame] | 404 | int __iio_device_attr_init(struct device_attribute *dev_attr, |
| 405 | const char *postfix, |
| 406 | struct iio_chan_spec const *chan, |
| 407 | ssize_t (*readfunc)(struct device *dev, |
| 408 | struct device_attribute *attr, |
| 409 | char *buf), |
| 410 | ssize_t (*writefunc)(struct device *dev, |
| 411 | struct device_attribute *attr, |
| 412 | const char *buf, |
| 413 | size_t len), |
| 414 | bool generic) |
| 415 | { |
| 416 | int ret; |
| 417 | char *name_format, *full_postfix; |
| 418 | sysfs_attr_init(&dev_attr->attr); |
Jonathan Cameron | ade7ef7 | 2011-09-02 17:14:45 +0100 | [diff] [blame] | 419 | |
| 420 | /* Build up postfix of <extend_name>_<modifier>_postfix */ |
Jonathan Cameron | 0403e0d | 2011-10-26 17:27:42 +0100 | [diff] [blame] | 421 | if (chan->modified && !generic) { |
Jonathan Cameron | ade7ef7 | 2011-09-02 17:14:45 +0100 | [diff] [blame] | 422 | if (chan->extend_name) |
| 423 | full_postfix = kasprintf(GFP_KERNEL, "%s_%s_%s", |
| 424 | iio_modifier_names[chan |
| 425 | ->channel2], |
| 426 | chan->extend_name, |
| 427 | postfix); |
| 428 | else |
| 429 | full_postfix = kasprintf(GFP_KERNEL, "%s_%s", |
| 430 | iio_modifier_names[chan |
| 431 | ->channel2], |
| 432 | postfix); |
| 433 | } else { |
| 434 | if (chan->extend_name == NULL) |
| 435 | full_postfix = kstrdup(postfix, GFP_KERNEL); |
| 436 | else |
| 437 | full_postfix = kasprintf(GFP_KERNEL, |
| 438 | "%s_%s", |
| 439 | chan->extend_name, |
| 440 | postfix); |
| 441 | } |
| 442 | if (full_postfix == NULL) { |
| 443 | ret = -ENOMEM; |
Jonathan Cameron | 1d89271 | 2011-05-18 14:40:51 +0100 | [diff] [blame] | 444 | goto error_ret; |
Jonathan Cameron | ade7ef7 | 2011-09-02 17:14:45 +0100 | [diff] [blame] | 445 | } |
Jonathan Cameron | 1d89271 | 2011-05-18 14:40:51 +0100 | [diff] [blame] | 446 | |
Jonathan Cameron | ade7ef7 | 2011-09-02 17:14:45 +0100 | [diff] [blame] | 447 | if (chan->differential) { /* Differential can not have modifier */ |
| 448 | if (generic) |
| 449 | name_format |
| 450 | = kasprintf(GFP_KERNEL, "%s_%s-%s_%s", |
| 451 | iio_direction[chan->output], |
| 452 | iio_chan_type_name_spec[chan->type], |
| 453 | iio_chan_type_name_spec[chan->type], |
| 454 | full_postfix); |
| 455 | else if (chan->indexed) |
| 456 | name_format |
| 457 | = kasprintf(GFP_KERNEL, "%s_%s%d-%s%d_%s", |
| 458 | iio_direction[chan->output], |
| 459 | iio_chan_type_name_spec[chan->type], |
| 460 | chan->channel, |
| 461 | iio_chan_type_name_spec[chan->type], |
| 462 | chan->channel2, |
| 463 | full_postfix); |
| 464 | else { |
| 465 | WARN_ON("Differential channels must be indexed\n"); |
| 466 | ret = -EINVAL; |
| 467 | goto error_free_full_postfix; |
| 468 | } |
| 469 | } else { /* Single ended */ |
| 470 | if (generic) |
| 471 | name_format |
| 472 | = kasprintf(GFP_KERNEL, "%s_%s_%s", |
| 473 | iio_direction[chan->output], |
| 474 | iio_chan_type_name_spec[chan->type], |
| 475 | full_postfix); |
| 476 | else if (chan->indexed) |
| 477 | name_format |
| 478 | = kasprintf(GFP_KERNEL, "%s_%s%d_%s", |
| 479 | iio_direction[chan->output], |
| 480 | iio_chan_type_name_spec[chan->type], |
| 481 | chan->channel, |
| 482 | full_postfix); |
| 483 | else |
| 484 | name_format |
| 485 | = kasprintf(GFP_KERNEL, "%s_%s_%s", |
| 486 | iio_direction[chan->output], |
| 487 | iio_chan_type_name_spec[chan->type], |
| 488 | full_postfix); |
| 489 | } |
Jonathan Cameron | 1d89271 | 2011-05-18 14:40:51 +0100 | [diff] [blame] | 490 | if (name_format == NULL) { |
| 491 | ret = -ENOMEM; |
| 492 | goto error_free_full_postfix; |
| 493 | } |
| 494 | dev_attr->attr.name = kasprintf(GFP_KERNEL, |
| 495 | name_format, |
| 496 | chan->channel, |
| 497 | chan->channel2); |
| 498 | if (dev_attr->attr.name == NULL) { |
| 499 | ret = -ENOMEM; |
| 500 | goto error_free_name_format; |
| 501 | } |
| 502 | |
| 503 | if (readfunc) { |
| 504 | dev_attr->attr.mode |= S_IRUGO; |
| 505 | dev_attr->show = readfunc; |
| 506 | } |
| 507 | |
| 508 | if (writefunc) { |
| 509 | dev_attr->attr.mode |= S_IWUSR; |
| 510 | dev_attr->store = writefunc; |
| 511 | } |
| 512 | kfree(name_format); |
| 513 | kfree(full_postfix); |
| 514 | |
| 515 | return 0; |
| 516 | |
| 517 | error_free_name_format: |
| 518 | kfree(name_format); |
| 519 | error_free_full_postfix: |
| 520 | kfree(full_postfix); |
Jonathan Cameron | 847ec80 | 2009-08-18 18:06:19 +0100 | [diff] [blame] | 521 | error_ret: |
| 522 | return ret; |
| 523 | } |
| 524 | |
Jonathan Cameron | df9c1c4 | 2011-08-12 17:56:03 +0100 | [diff] [blame] | 525 | static void __iio_device_attr_deinit(struct device_attribute *dev_attr) |
Jonathan Cameron | 1d89271 | 2011-05-18 14:40:51 +0100 | [diff] [blame] | 526 | { |
| 527 | kfree(dev_attr->attr.name); |
| 528 | } |
| 529 | |
| 530 | int __iio_add_chan_devattr(const char *postfix, |
Jonathan Cameron | 1d89271 | 2011-05-18 14:40:51 +0100 | [diff] [blame] | 531 | struct iio_chan_spec const *chan, |
| 532 | ssize_t (*readfunc)(struct device *dev, |
| 533 | struct device_attribute *attr, |
| 534 | char *buf), |
| 535 | ssize_t (*writefunc)(struct device *dev, |
| 536 | struct device_attribute *attr, |
| 537 | const char *buf, |
| 538 | size_t len), |
Jonathan Cameron | e614a54 | 2011-09-02 17:14:41 +0100 | [diff] [blame] | 539 | u64 mask, |
Jonathan Cameron | 1d89271 | 2011-05-18 14:40:51 +0100 | [diff] [blame] | 540 | bool generic, |
| 541 | struct device *dev, |
| 542 | struct list_head *attr_list) |
| 543 | { |
| 544 | int ret; |
| 545 | struct iio_dev_attr *iio_attr, *t; |
| 546 | |
| 547 | iio_attr = kzalloc(sizeof *iio_attr, GFP_KERNEL); |
| 548 | if (iio_attr == NULL) { |
| 549 | ret = -ENOMEM; |
| 550 | goto error_ret; |
| 551 | } |
| 552 | ret = __iio_device_attr_init(&iio_attr->dev_attr, |
| 553 | postfix, chan, |
| 554 | readfunc, writefunc, generic); |
| 555 | if (ret) |
| 556 | goto error_iio_dev_attr_free; |
| 557 | iio_attr->c = chan; |
| 558 | iio_attr->address = mask; |
| 559 | list_for_each_entry(t, attr_list, l) |
| 560 | if (strcmp(t->dev_attr.attr.name, |
| 561 | iio_attr->dev_attr.attr.name) == 0) { |
| 562 | if (!generic) |
| 563 | dev_err(dev, "tried to double register : %s\n", |
| 564 | t->dev_attr.attr.name); |
| 565 | ret = -EBUSY; |
| 566 | goto error_device_attr_deinit; |
| 567 | } |
Jonathan Cameron | 1d89271 | 2011-05-18 14:40:51 +0100 | [diff] [blame] | 568 | list_add(&iio_attr->l, attr_list); |
| 569 | |
| 570 | return 0; |
| 571 | |
| 572 | error_device_attr_deinit: |
| 573 | __iio_device_attr_deinit(&iio_attr->dev_attr); |
| 574 | error_iio_dev_attr_free: |
| 575 | kfree(iio_attr); |
| 576 | error_ret: |
| 577 | return ret; |
| 578 | } |
| 579 | |
Jonathan Cameron | f8c6f4e | 2011-10-06 17:14:35 +0100 | [diff] [blame] | 580 | static int iio_device_add_channel_sysfs(struct iio_dev *indio_dev, |
Jonathan Cameron | 1d89271 | 2011-05-18 14:40:51 +0100 | [diff] [blame] | 581 | struct iio_chan_spec const *chan) |
| 582 | { |
Jonathan Cameron | 26d25ae | 2011-09-02 17:14:40 +0100 | [diff] [blame] | 583 | int ret, i, attrcount = 0; |
Jonathan Cameron | 1d89271 | 2011-05-18 14:40:51 +0100 | [diff] [blame] | 584 | |
Jonathan Cameron | 1d89271 | 2011-05-18 14:40:51 +0100 | [diff] [blame] | 585 | if (chan->channel < 0) |
| 586 | return 0; |
Jonathan Cameron | 1e8dfcc | 2011-08-30 12:41:11 +0100 | [diff] [blame] | 587 | |
| 588 | ret = __iio_add_chan_devattr(iio_data_type_name[chan->processed_val], |
Jonathan Cameron | 26d25ae | 2011-09-02 17:14:40 +0100 | [diff] [blame] | 589 | chan, |
Jonathan Cameron | 1e8dfcc | 2011-08-30 12:41:11 +0100 | [diff] [blame] | 590 | &iio_read_channel_info, |
Jonathan Cameron | c6fc806 | 2011-09-02 17:14:34 +0100 | [diff] [blame] | 591 | (chan->output ? |
Jonathan Cameron | 1e8dfcc | 2011-08-30 12:41:11 +0100 | [diff] [blame] | 592 | &iio_write_channel_info : NULL), |
| 593 | 0, |
| 594 | 0, |
Jonathan Cameron | f8c6f4e | 2011-10-06 17:14:35 +0100 | [diff] [blame] | 595 | &indio_dev->dev, |
| 596 | &indio_dev->channel_attr_list); |
Jonathan Cameron | 1d89271 | 2011-05-18 14:40:51 +0100 | [diff] [blame] | 597 | if (ret) |
| 598 | goto error_ret; |
Jonathan Cameron | 26d25ae | 2011-09-02 17:14:40 +0100 | [diff] [blame] | 599 | attrcount++; |
Jonathan Cameron | 1d89271 | 2011-05-18 14:40:51 +0100 | [diff] [blame] | 600 | |
| 601 | for_each_set_bit(i, &chan->info_mask, sizeof(long)*8) { |
| 602 | ret = __iio_add_chan_devattr(iio_chan_info_postfix[i/2], |
Jonathan Cameron | 26d25ae | 2011-09-02 17:14:40 +0100 | [diff] [blame] | 603 | chan, |
Jonathan Cameron | 1d89271 | 2011-05-18 14:40:51 +0100 | [diff] [blame] | 604 | &iio_read_channel_info, |
| 605 | &iio_write_channel_info, |
| 606 | (1 << i), |
| 607 | !(i%2), |
Jonathan Cameron | f8c6f4e | 2011-10-06 17:14:35 +0100 | [diff] [blame] | 608 | &indio_dev->dev, |
| 609 | &indio_dev->channel_attr_list); |
Jonathan Cameron | 1d89271 | 2011-05-18 14:40:51 +0100 | [diff] [blame] | 610 | if (ret == -EBUSY && (i%2 == 0)) { |
| 611 | ret = 0; |
| 612 | continue; |
| 613 | } |
| 614 | if (ret < 0) |
| 615 | goto error_ret; |
Jonathan Cameron | 26d25ae | 2011-09-02 17:14:40 +0100 | [diff] [blame] | 616 | attrcount++; |
Jonathan Cameron | 1d89271 | 2011-05-18 14:40:51 +0100 | [diff] [blame] | 617 | } |
Jonathan Cameron | 26d25ae | 2011-09-02 17:14:40 +0100 | [diff] [blame] | 618 | ret = attrcount; |
Jonathan Cameron | 1d89271 | 2011-05-18 14:40:51 +0100 | [diff] [blame] | 619 | error_ret: |
| 620 | return ret; |
| 621 | } |
| 622 | |
Jonathan Cameron | f8c6f4e | 2011-10-06 17:14:35 +0100 | [diff] [blame] | 623 | static void iio_device_remove_and_free_read_attr(struct iio_dev *indio_dev, |
Jonathan Cameron | 1d89271 | 2011-05-18 14:40:51 +0100 | [diff] [blame] | 624 | struct iio_dev_attr *p) |
| 625 | { |
Jonathan Cameron | 1d89271 | 2011-05-18 14:40:51 +0100 | [diff] [blame] | 626 | kfree(p->dev_attr.attr.name); |
| 627 | kfree(p); |
| 628 | } |
| 629 | |
Jonathan Cameron | 1b73288 | 2011-05-18 14:41:43 +0100 | [diff] [blame] | 630 | static ssize_t iio_show_dev_name(struct device *dev, |
| 631 | struct device_attribute *attr, |
| 632 | char *buf) |
| 633 | { |
| 634 | struct iio_dev *indio_dev = dev_get_drvdata(dev); |
| 635 | return sprintf(buf, "%s\n", indio_dev->name); |
| 636 | } |
| 637 | |
| 638 | static DEVICE_ATTR(name, S_IRUGO, iio_show_dev_name, NULL); |
| 639 | |
Jonathan Cameron | f8c6f4e | 2011-10-06 17:14:35 +0100 | [diff] [blame] | 640 | static int iio_device_register_sysfs(struct iio_dev *indio_dev) |
Jonathan Cameron | 1d89271 | 2011-05-18 14:40:51 +0100 | [diff] [blame] | 641 | { |
Jonathan Cameron | 26d25ae | 2011-09-02 17:14:40 +0100 | [diff] [blame] | 642 | int i, ret = 0, attrcount, attrn, attrcount_orig = 0; |
Jonathan Cameron | 1d89271 | 2011-05-18 14:40:51 +0100 | [diff] [blame] | 643 | struct iio_dev_attr *p, *n; |
Jonathan Cameron | 26d25ae | 2011-09-02 17:14:40 +0100 | [diff] [blame] | 644 | struct attribute **attr; |
Jonathan Cameron | 1d89271 | 2011-05-18 14:40:51 +0100 | [diff] [blame] | 645 | |
Jonathan Cameron | 26d25ae | 2011-09-02 17:14:40 +0100 | [diff] [blame] | 646 | /* First count elements in any existing group */ |
Jonathan Cameron | f8c6f4e | 2011-10-06 17:14:35 +0100 | [diff] [blame] | 647 | if (indio_dev->info->attrs) { |
| 648 | attr = indio_dev->info->attrs->attrs; |
Jonathan Cameron | 26d25ae | 2011-09-02 17:14:40 +0100 | [diff] [blame] | 649 | while (*attr++ != NULL) |
| 650 | attrcount_orig++; |
Jonathan Cameron | 1d89271 | 2011-05-18 14:40:51 +0100 | [diff] [blame] | 651 | } |
Jonathan Cameron | 26d25ae | 2011-09-02 17:14:40 +0100 | [diff] [blame] | 652 | attrcount = attrcount_orig; |
Jonathan Cameron | 1d89271 | 2011-05-18 14:40:51 +0100 | [diff] [blame] | 653 | /* |
| 654 | * New channel registration method - relies on the fact a group does |
| 655 | * not need to be initialized if it is name is NULL. |
| 656 | */ |
Jonathan Cameron | f8c6f4e | 2011-10-06 17:14:35 +0100 | [diff] [blame] | 657 | INIT_LIST_HEAD(&indio_dev->channel_attr_list); |
| 658 | if (indio_dev->channels) |
| 659 | for (i = 0; i < indio_dev->num_channels; i++) { |
| 660 | ret = iio_device_add_channel_sysfs(indio_dev, |
| 661 | &indio_dev |
Jonathan Cameron | 1d89271 | 2011-05-18 14:40:51 +0100 | [diff] [blame] | 662 | ->channels[i]); |
| 663 | if (ret < 0) |
| 664 | goto error_clear_attrs; |
Jonathan Cameron | 26d25ae | 2011-09-02 17:14:40 +0100 | [diff] [blame] | 665 | attrcount += ret; |
Jonathan Cameron | 1d89271 | 2011-05-18 14:40:51 +0100 | [diff] [blame] | 666 | } |
Jonathan Cameron | 26d25ae | 2011-09-02 17:14:40 +0100 | [diff] [blame] | 667 | |
Jonathan Cameron | f8c6f4e | 2011-10-06 17:14:35 +0100 | [diff] [blame] | 668 | if (indio_dev->name) |
Jonathan Cameron | 26d25ae | 2011-09-02 17:14:40 +0100 | [diff] [blame] | 669 | attrcount++; |
| 670 | |
Jonathan Cameron | f8c6f4e | 2011-10-06 17:14:35 +0100 | [diff] [blame] | 671 | indio_dev->chan_attr_group.attrs |
| 672 | = kzalloc(sizeof(indio_dev->chan_attr_group.attrs[0])* |
Jonathan Cameron | 26d25ae | 2011-09-02 17:14:40 +0100 | [diff] [blame] | 673 | (attrcount + 1), |
| 674 | GFP_KERNEL); |
Jonathan Cameron | f8c6f4e | 2011-10-06 17:14:35 +0100 | [diff] [blame] | 675 | if (indio_dev->chan_attr_group.attrs == NULL) { |
Jonathan Cameron | 26d25ae | 2011-09-02 17:14:40 +0100 | [diff] [blame] | 676 | ret = -ENOMEM; |
| 677 | goto error_clear_attrs; |
Jonathan Cameron | 1b73288 | 2011-05-18 14:41:43 +0100 | [diff] [blame] | 678 | } |
Jonathan Cameron | 26d25ae | 2011-09-02 17:14:40 +0100 | [diff] [blame] | 679 | /* Copy across original attributes */ |
Jonathan Cameron | f8c6f4e | 2011-10-06 17:14:35 +0100 | [diff] [blame] | 680 | if (indio_dev->info->attrs) |
| 681 | memcpy(indio_dev->chan_attr_group.attrs, |
| 682 | indio_dev->info->attrs->attrs, |
| 683 | sizeof(indio_dev->chan_attr_group.attrs[0]) |
Jonathan Cameron | 26d25ae | 2011-09-02 17:14:40 +0100 | [diff] [blame] | 684 | *attrcount_orig); |
| 685 | attrn = attrcount_orig; |
| 686 | /* Add all elements from the list. */ |
Jonathan Cameron | f8c6f4e | 2011-10-06 17:14:35 +0100 | [diff] [blame] | 687 | list_for_each_entry(p, &indio_dev->channel_attr_list, l) |
| 688 | indio_dev->chan_attr_group.attrs[attrn++] = &p->dev_attr.attr; |
| 689 | if (indio_dev->name) |
| 690 | indio_dev->chan_attr_group.attrs[attrn++] = &dev_attr_name.attr; |
Jonathan Cameron | 26d25ae | 2011-09-02 17:14:40 +0100 | [diff] [blame] | 691 | |
Jonathan Cameron | f8c6f4e | 2011-10-06 17:14:35 +0100 | [diff] [blame] | 692 | indio_dev->groups[indio_dev->groupcounter++] = |
| 693 | &indio_dev->chan_attr_group; |
Jonathan Cameron | 26d25ae | 2011-09-02 17:14:40 +0100 | [diff] [blame] | 694 | |
Jonathan Cameron | 1d89271 | 2011-05-18 14:40:51 +0100 | [diff] [blame] | 695 | return 0; |
Jonathan Cameron | 1b73288 | 2011-05-18 14:41:43 +0100 | [diff] [blame] | 696 | |
Jonathan Cameron | 1d89271 | 2011-05-18 14:40:51 +0100 | [diff] [blame] | 697 | error_clear_attrs: |
| 698 | list_for_each_entry_safe(p, n, |
Jonathan Cameron | f8c6f4e | 2011-10-06 17:14:35 +0100 | [diff] [blame] | 699 | &indio_dev->channel_attr_list, l) { |
Jonathan Cameron | 1d89271 | 2011-05-18 14:40:51 +0100 | [diff] [blame] | 700 | list_del(&p->l); |
Jonathan Cameron | f8c6f4e | 2011-10-06 17:14:35 +0100 | [diff] [blame] | 701 | iio_device_remove_and_free_read_attr(indio_dev, p); |
Jonathan Cameron | 1d89271 | 2011-05-18 14:40:51 +0100 | [diff] [blame] | 702 | } |
Jonathan Cameron | 1d89271 | 2011-05-18 14:40:51 +0100 | [diff] [blame] | 703 | |
Jonathan Cameron | 26d25ae | 2011-09-02 17:14:40 +0100 | [diff] [blame] | 704 | return ret; |
Jonathan Cameron | 1d89271 | 2011-05-18 14:40:51 +0100 | [diff] [blame] | 705 | } |
| 706 | |
Jonathan Cameron | f8c6f4e | 2011-10-06 17:14:35 +0100 | [diff] [blame] | 707 | static void iio_device_unregister_sysfs(struct iio_dev *indio_dev) |
Jonathan Cameron | 847ec80 | 2009-08-18 18:06:19 +0100 | [diff] [blame] | 708 | { |
Jonathan Cameron | 1d89271 | 2011-05-18 14:40:51 +0100 | [diff] [blame] | 709 | |
| 710 | struct iio_dev_attr *p, *n; |
Jonathan Cameron | 26d25ae | 2011-09-02 17:14:40 +0100 | [diff] [blame] | 711 | |
Jonathan Cameron | f8c6f4e | 2011-10-06 17:14:35 +0100 | [diff] [blame] | 712 | list_for_each_entry_safe(p, n, &indio_dev->channel_attr_list, l) { |
Jonathan Cameron | 1d89271 | 2011-05-18 14:40:51 +0100 | [diff] [blame] | 713 | list_del(&p->l); |
Jonathan Cameron | f8c6f4e | 2011-10-06 17:14:35 +0100 | [diff] [blame] | 714 | iio_device_remove_and_free_read_attr(indio_dev, p); |
Jonathan Cameron | 1d89271 | 2011-05-18 14:40:51 +0100 | [diff] [blame] | 715 | } |
Jonathan Cameron | f8c6f4e | 2011-10-06 17:14:35 +0100 | [diff] [blame] | 716 | kfree(indio_dev->chan_attr_group.attrs); |
Jonathan Cameron | 847ec80 | 2009-08-18 18:06:19 +0100 | [diff] [blame] | 717 | } |
| 718 | |
Jonathan Cameron | 1d89271 | 2011-05-18 14:40:51 +0100 | [diff] [blame] | 719 | static const char * const iio_ev_type_text[] = { |
| 720 | [IIO_EV_TYPE_THRESH] = "thresh", |
| 721 | [IIO_EV_TYPE_MAG] = "mag", |
Jonathan Cameron | 8ce7375 | 2011-09-02 17:14:44 +0100 | [diff] [blame] | 722 | [IIO_EV_TYPE_ROC] = "roc", |
| 723 | [IIO_EV_TYPE_THRESH_ADAPTIVE] = "thresh_adaptive", |
| 724 | [IIO_EV_TYPE_MAG_ADAPTIVE] = "mag_adaptive", |
Jonathan Cameron | 1d89271 | 2011-05-18 14:40:51 +0100 | [diff] [blame] | 725 | }; |
| 726 | |
| 727 | static const char * const iio_ev_dir_text[] = { |
| 728 | [IIO_EV_DIR_EITHER] = "either", |
| 729 | [IIO_EV_DIR_RISING] = "rising", |
| 730 | [IIO_EV_DIR_FALLING] = "falling" |
| 731 | }; |
| 732 | |
| 733 | static ssize_t iio_ev_state_store(struct device *dev, |
| 734 | struct device_attribute *attr, |
| 735 | const char *buf, |
| 736 | size_t len) |
| 737 | { |
| 738 | struct iio_dev *indio_dev = dev_get_drvdata(dev); |
Jonathan Cameron | aaf370d | 2011-05-18 14:41:16 +0100 | [diff] [blame] | 739 | struct iio_dev_attr *this_attr = to_iio_dev_attr(attr); |
Jonathan Cameron | 1d89271 | 2011-05-18 14:40:51 +0100 | [diff] [blame] | 740 | int ret; |
Jonathan Cameron | c74b0de | 2011-05-18 14:42:33 +0100 | [diff] [blame] | 741 | bool val; |
| 742 | |
| 743 | ret = strtobool(buf, &val); |
| 744 | if (ret < 0) |
| 745 | return ret; |
Jonathan Cameron | 1d89271 | 2011-05-18 14:40:51 +0100 | [diff] [blame] | 746 | |
Jonathan Cameron | 6fe8135 | 2011-05-18 14:42:37 +0100 | [diff] [blame] | 747 | ret = indio_dev->info->write_event_config(indio_dev, |
| 748 | this_attr->address, |
| 749 | val); |
Jonathan Cameron | 1d89271 | 2011-05-18 14:40:51 +0100 | [diff] [blame] | 750 | return (ret < 0) ? ret : len; |
| 751 | } |
| 752 | |
| 753 | static ssize_t iio_ev_state_show(struct device *dev, |
| 754 | struct device_attribute *attr, |
| 755 | char *buf) |
| 756 | { |
| 757 | struct iio_dev *indio_dev = dev_get_drvdata(dev); |
Jonathan Cameron | aaf370d | 2011-05-18 14:41:16 +0100 | [diff] [blame] | 758 | struct iio_dev_attr *this_attr = to_iio_dev_attr(attr); |
Jonathan Cameron | 6fe8135 | 2011-05-18 14:42:37 +0100 | [diff] [blame] | 759 | int val = indio_dev->info->read_event_config(indio_dev, |
| 760 | this_attr->address); |
Jonathan Cameron | 1d89271 | 2011-05-18 14:40:51 +0100 | [diff] [blame] | 761 | |
| 762 | if (val < 0) |
| 763 | return val; |
| 764 | else |
| 765 | return sprintf(buf, "%d\n", val); |
| 766 | } |
| 767 | |
| 768 | static ssize_t iio_ev_value_show(struct device *dev, |
| 769 | struct device_attribute *attr, |
| 770 | char *buf) |
| 771 | { |
| 772 | struct iio_dev *indio_dev = dev_get_drvdata(dev); |
| 773 | struct iio_dev_attr *this_attr = to_iio_dev_attr(attr); |
| 774 | int val, ret; |
| 775 | |
Jonathan Cameron | 6fe8135 | 2011-05-18 14:42:37 +0100 | [diff] [blame] | 776 | ret = indio_dev->info->read_event_value(indio_dev, |
| 777 | this_attr->address, &val); |
Jonathan Cameron | 1d89271 | 2011-05-18 14:40:51 +0100 | [diff] [blame] | 778 | if (ret < 0) |
| 779 | return ret; |
| 780 | |
| 781 | return sprintf(buf, "%d\n", val); |
| 782 | } |
| 783 | |
| 784 | static ssize_t iio_ev_value_store(struct device *dev, |
| 785 | struct device_attribute *attr, |
| 786 | const char *buf, |
| 787 | size_t len) |
| 788 | { |
| 789 | struct iio_dev *indio_dev = dev_get_drvdata(dev); |
| 790 | struct iio_dev_attr *this_attr = to_iio_dev_attr(attr); |
| 791 | unsigned long val; |
| 792 | int ret; |
| 793 | |
| 794 | ret = strict_strtoul(buf, 10, &val); |
| 795 | if (ret) |
| 796 | return ret; |
| 797 | |
Jonathan Cameron | 6fe8135 | 2011-05-18 14:42:37 +0100 | [diff] [blame] | 798 | ret = indio_dev->info->write_event_value(indio_dev, this_attr->address, |
| 799 | val); |
Jonathan Cameron | 1d89271 | 2011-05-18 14:40:51 +0100 | [diff] [blame] | 800 | if (ret < 0) |
| 801 | return ret; |
| 802 | |
| 803 | return len; |
| 804 | } |
| 805 | |
Jonathan Cameron | f8c6f4e | 2011-10-06 17:14:35 +0100 | [diff] [blame] | 806 | static int iio_device_add_event_sysfs(struct iio_dev *indio_dev, |
Jonathan Cameron | 1d89271 | 2011-05-18 14:40:51 +0100 | [diff] [blame] | 807 | struct iio_chan_spec const *chan) |
| 808 | { |
Jonathan Cameron | e614a54 | 2011-09-02 17:14:41 +0100 | [diff] [blame] | 809 | int ret = 0, i, attrcount = 0; |
| 810 | u64 mask = 0; |
Jonathan Cameron | 1d89271 | 2011-05-18 14:40:51 +0100 | [diff] [blame] | 811 | char *postfix; |
| 812 | if (!chan->event_mask) |
| 813 | return 0; |
| 814 | |
| 815 | for_each_set_bit(i, &chan->event_mask, sizeof(chan->event_mask)*8) { |
| 816 | postfix = kasprintf(GFP_KERNEL, "%s_%s_en", |
Jonathan Cameron | c04ea8a | 2011-09-02 17:14:42 +0100 | [diff] [blame] | 817 | iio_ev_type_text[i/IIO_EV_DIR_MAX], |
| 818 | iio_ev_dir_text[i%IIO_EV_DIR_MAX]); |
Jonathan Cameron | 1d89271 | 2011-05-18 14:40:51 +0100 | [diff] [blame] | 819 | if (postfix == NULL) { |
| 820 | ret = -ENOMEM; |
| 821 | goto error_ret; |
| 822 | } |
Jonathan Cameron | 330c6c5 | 2011-09-02 17:14:39 +0100 | [diff] [blame] | 823 | if (chan->modified) |
Jonathan Cameron | 1d89271 | 2011-05-18 14:40:51 +0100 | [diff] [blame] | 824 | mask = IIO_MOD_EVENT_CODE(chan->type, 0, chan->channel, |
Jonathan Cameron | c04ea8a | 2011-09-02 17:14:42 +0100 | [diff] [blame] | 825 | i/IIO_EV_DIR_MAX, |
| 826 | i%IIO_EV_DIR_MAX); |
Jonathan Cameron | ade7ef7 | 2011-09-02 17:14:45 +0100 | [diff] [blame] | 827 | else if (chan->differential) |
| 828 | mask = IIO_EVENT_CODE(chan->type, |
| 829 | 0, 0, |
| 830 | i%IIO_EV_DIR_MAX, |
| 831 | i/IIO_EV_DIR_MAX, |
| 832 | 0, |
| 833 | chan->channel, |
| 834 | chan->channel2); |
Jonathan Cameron | 330c6c5 | 2011-09-02 17:14:39 +0100 | [diff] [blame] | 835 | else |
| 836 | mask = IIO_UNMOD_EVENT_CODE(chan->type, |
| 837 | chan->channel, |
Jonathan Cameron | c04ea8a | 2011-09-02 17:14:42 +0100 | [diff] [blame] | 838 | i/IIO_EV_DIR_MAX, |
| 839 | i%IIO_EV_DIR_MAX); |
Jonathan Cameron | 330c6c5 | 2011-09-02 17:14:39 +0100 | [diff] [blame] | 840 | |
Jonathan Cameron | aaf370d | 2011-05-18 14:41:16 +0100 | [diff] [blame] | 841 | ret = __iio_add_chan_devattr(postfix, |
Jonathan Cameron | aaf370d | 2011-05-18 14:41:16 +0100 | [diff] [blame] | 842 | chan, |
| 843 | &iio_ev_state_show, |
| 844 | iio_ev_state_store, |
| 845 | mask, |
Jonathan Cameron | aaf370d | 2011-05-18 14:41:16 +0100 | [diff] [blame] | 846 | 0, |
Jonathan Cameron | f8c6f4e | 2011-10-06 17:14:35 +0100 | [diff] [blame] | 847 | &indio_dev->dev, |
| 848 | &indio_dev->event_interface-> |
Jonathan Cameron | aaf370d | 2011-05-18 14:41:16 +0100 | [diff] [blame] | 849 | dev_attr_list); |
Jonathan Cameron | 1d89271 | 2011-05-18 14:40:51 +0100 | [diff] [blame] | 850 | kfree(postfix); |
| 851 | if (ret) |
| 852 | goto error_ret; |
Jonathan Cameron | 26d25ae | 2011-09-02 17:14:40 +0100 | [diff] [blame] | 853 | attrcount++; |
Jonathan Cameron | 1d89271 | 2011-05-18 14:40:51 +0100 | [diff] [blame] | 854 | postfix = kasprintf(GFP_KERNEL, "%s_%s_value", |
Jonathan Cameron | c04ea8a | 2011-09-02 17:14:42 +0100 | [diff] [blame] | 855 | iio_ev_type_text[i/IIO_EV_DIR_MAX], |
| 856 | iio_ev_dir_text[i%IIO_EV_DIR_MAX]); |
Jonathan Cameron | 1d89271 | 2011-05-18 14:40:51 +0100 | [diff] [blame] | 857 | if (postfix == NULL) { |
| 858 | ret = -ENOMEM; |
| 859 | goto error_ret; |
| 860 | } |
Jonathan Cameron | 26d25ae | 2011-09-02 17:14:40 +0100 | [diff] [blame] | 861 | ret = __iio_add_chan_devattr(postfix, chan, |
Jonathan Cameron | 1d89271 | 2011-05-18 14:40:51 +0100 | [diff] [blame] | 862 | iio_ev_value_show, |
| 863 | iio_ev_value_store, |
| 864 | mask, |
| 865 | 0, |
Jonathan Cameron | f8c6f4e | 2011-10-06 17:14:35 +0100 | [diff] [blame] | 866 | &indio_dev->dev, |
| 867 | &indio_dev->event_interface-> |
Jonathan Cameron | 5aa9618 | 2011-08-30 12:41:06 +0100 | [diff] [blame] | 868 | dev_attr_list); |
Jonathan Cameron | 1d89271 | 2011-05-18 14:40:51 +0100 | [diff] [blame] | 869 | kfree(postfix); |
| 870 | if (ret) |
| 871 | goto error_ret; |
Jonathan Cameron | 26d25ae | 2011-09-02 17:14:40 +0100 | [diff] [blame] | 872 | attrcount++; |
Jonathan Cameron | 1d89271 | 2011-05-18 14:40:51 +0100 | [diff] [blame] | 873 | } |
Jonathan Cameron | 26d25ae | 2011-09-02 17:14:40 +0100 | [diff] [blame] | 874 | ret = attrcount; |
Jonathan Cameron | 1d89271 | 2011-05-18 14:40:51 +0100 | [diff] [blame] | 875 | error_ret: |
| 876 | return ret; |
| 877 | } |
| 878 | |
Jonathan Cameron | f8c6f4e | 2011-10-06 17:14:35 +0100 | [diff] [blame] | 879 | static inline void __iio_remove_event_config_attrs(struct iio_dev *indio_dev) |
Jonathan Cameron | 1d89271 | 2011-05-18 14:40:51 +0100 | [diff] [blame] | 880 | { |
| 881 | struct iio_dev_attr *p, *n; |
Jonathan Cameron | 1d89271 | 2011-05-18 14:40:51 +0100 | [diff] [blame] | 882 | list_for_each_entry_safe(p, n, |
Jonathan Cameron | f8c6f4e | 2011-10-06 17:14:35 +0100 | [diff] [blame] | 883 | &indio_dev->event_interface-> |
Jonathan Cameron | 1d89271 | 2011-05-18 14:40:51 +0100 | [diff] [blame] | 884 | dev_attr_list, l) { |
Jonathan Cameron | 1d89271 | 2011-05-18 14:40:51 +0100 | [diff] [blame] | 885 | kfree(p->dev_attr.attr.name); |
| 886 | kfree(p); |
| 887 | } |
Jonathan Cameron | 1d89271 | 2011-05-18 14:40:51 +0100 | [diff] [blame] | 888 | } |
| 889 | |
Jonathan Cameron | f8c6f4e | 2011-10-06 17:14:35 +0100 | [diff] [blame] | 890 | static inline int __iio_add_event_config_attrs(struct iio_dev *indio_dev) |
Jonathan Cameron | 847ec80 | 2009-08-18 18:06:19 +0100 | [diff] [blame] | 891 | { |
Jonathan Cameron | 26d25ae | 2011-09-02 17:14:40 +0100 | [diff] [blame] | 892 | int j, ret, attrcount = 0; |
Jonathan Cameron | 1e8dfcc | 2011-08-30 12:41:11 +0100 | [diff] [blame] | 893 | |
Jonathan Cameron | f8c6f4e | 2011-10-06 17:14:35 +0100 | [diff] [blame] | 894 | INIT_LIST_HEAD(&indio_dev->event_interface->dev_attr_list); |
Jonathan Cameron | 1d89271 | 2011-05-18 14:40:51 +0100 | [diff] [blame] | 895 | /* Dynically created from the channels array */ |
Jonathan Cameron | f8c6f4e | 2011-10-06 17:14:35 +0100 | [diff] [blame] | 896 | for (j = 0; j < indio_dev->num_channels; j++) { |
| 897 | ret = iio_device_add_event_sysfs(indio_dev, |
| 898 | &indio_dev->channels[j]); |
Jonathan Cameron | 26d25ae | 2011-09-02 17:14:40 +0100 | [diff] [blame] | 899 | if (ret < 0) |
Jonathan Cameron | 5aa9618 | 2011-08-30 12:41:06 +0100 | [diff] [blame] | 900 | goto error_clear_attrs; |
Jonathan Cameron | 26d25ae | 2011-09-02 17:14:40 +0100 | [diff] [blame] | 901 | attrcount += ret; |
Jonathan Cameron | 1d89271 | 2011-05-18 14:40:51 +0100 | [diff] [blame] | 902 | } |
Jonathan Cameron | 26d25ae | 2011-09-02 17:14:40 +0100 | [diff] [blame] | 903 | return attrcount; |
Jonathan Cameron | 847ec80 | 2009-08-18 18:06:19 +0100 | [diff] [blame] | 904 | |
Jonathan Cameron | 1d89271 | 2011-05-18 14:40:51 +0100 | [diff] [blame] | 905 | error_clear_attrs: |
Jonathan Cameron | f8c6f4e | 2011-10-06 17:14:35 +0100 | [diff] [blame] | 906 | __iio_remove_event_config_attrs(indio_dev); |
Jonathan Cameron | 847ec80 | 2009-08-18 18:06:19 +0100 | [diff] [blame] | 907 | |
| 908 | return ret; |
| 909 | } |
| 910 | |
Jonathan Cameron | f8c6f4e | 2011-10-06 17:14:35 +0100 | [diff] [blame] | 911 | static bool iio_check_for_dynamic_events(struct iio_dev *indio_dev) |
Jonathan Cameron | 5aa9618 | 2011-08-30 12:41:06 +0100 | [diff] [blame] | 912 | { |
| 913 | int j; |
Jonathan Cameron | 1e8dfcc | 2011-08-30 12:41:11 +0100 | [diff] [blame] | 914 | |
Jonathan Cameron | f8c6f4e | 2011-10-06 17:14:35 +0100 | [diff] [blame] | 915 | for (j = 0; j < indio_dev->num_channels; j++) |
| 916 | if (indio_dev->channels[j].event_mask != 0) |
Jonathan Cameron | 5aa9618 | 2011-08-30 12:41:06 +0100 | [diff] [blame] | 917 | return true; |
| 918 | return false; |
| 919 | } |
| 920 | |
Jonathan Cameron | 1e8dfcc | 2011-08-30 12:41:11 +0100 | [diff] [blame] | 921 | static void iio_setup_ev_int(struct iio_event_interface *ev_int) |
| 922 | { |
| 923 | mutex_init(&ev_int->event_list_lock); |
| 924 | /* discussion point - make this variable? */ |
| 925 | ev_int->max_events = 10; |
| 926 | ev_int->current_events = 0; |
| 927 | INIT_LIST_HEAD(&ev_int->det_events); |
| 928 | init_waitqueue_head(&ev_int->wait); |
| 929 | } |
| 930 | |
Jonathan Cameron | 26d25ae | 2011-09-02 17:14:40 +0100 | [diff] [blame] | 931 | static const char *iio_event_group_name = "events"; |
Jonathan Cameron | f8c6f4e | 2011-10-06 17:14:35 +0100 | [diff] [blame] | 932 | static int iio_device_register_eventset(struct iio_dev *indio_dev) |
Jonathan Cameron | 847ec80 | 2009-08-18 18:06:19 +0100 | [diff] [blame] | 933 | { |
Jonathan Cameron | 26d25ae | 2011-09-02 17:14:40 +0100 | [diff] [blame] | 934 | struct iio_dev_attr *p; |
| 935 | int ret = 0, attrcount_orig = 0, attrcount, attrn; |
| 936 | struct attribute **attr; |
Jonathan Cameron | 847ec80 | 2009-08-18 18:06:19 +0100 | [diff] [blame] | 937 | |
Jonathan Cameron | f8c6f4e | 2011-10-06 17:14:35 +0100 | [diff] [blame] | 938 | if (!(indio_dev->info->event_attrs || |
| 939 | iio_check_for_dynamic_events(indio_dev))) |
Jonathan Cameron | 847ec80 | 2009-08-18 18:06:19 +0100 | [diff] [blame] | 940 | return 0; |
| 941 | |
Jonathan Cameron | f8c6f4e | 2011-10-06 17:14:35 +0100 | [diff] [blame] | 942 | indio_dev->event_interface = |
Jonathan Cameron | 5aa9618 | 2011-08-30 12:41:06 +0100 | [diff] [blame] | 943 | kzalloc(sizeof(struct iio_event_interface), GFP_KERNEL); |
Jonathan Cameron | f8c6f4e | 2011-10-06 17:14:35 +0100 | [diff] [blame] | 944 | if (indio_dev->event_interface == NULL) { |
Jonathan Cameron | 847ec80 | 2009-08-18 18:06:19 +0100 | [diff] [blame] | 945 | ret = -ENOMEM; |
| 946 | goto error_ret; |
| 947 | } |
| 948 | |
Jonathan Cameron | f8c6f4e | 2011-10-06 17:14:35 +0100 | [diff] [blame] | 949 | iio_setup_ev_int(indio_dev->event_interface); |
| 950 | if (indio_dev->info->event_attrs != NULL) { |
| 951 | attr = indio_dev->info->event_attrs->attrs; |
Jonathan Cameron | 26d25ae | 2011-09-02 17:14:40 +0100 | [diff] [blame] | 952 | while (*attr++ != NULL) |
| 953 | attrcount_orig++; |
Jonathan Cameron | 5aa9618 | 2011-08-30 12:41:06 +0100 | [diff] [blame] | 954 | } |
Jonathan Cameron | 26d25ae | 2011-09-02 17:14:40 +0100 | [diff] [blame] | 955 | attrcount = attrcount_orig; |
Jonathan Cameron | f8c6f4e | 2011-10-06 17:14:35 +0100 | [diff] [blame] | 956 | if (indio_dev->channels) { |
| 957 | ret = __iio_add_event_config_attrs(indio_dev); |
Jonathan Cameron | 26d25ae | 2011-09-02 17:14:40 +0100 | [diff] [blame] | 958 | if (ret < 0) |
Jonathan Cameron | cc2439f | 2011-08-12 16:55:30 +0100 | [diff] [blame] | 959 | goto error_free_setup_event_lines; |
Jonathan Cameron | 26d25ae | 2011-09-02 17:14:40 +0100 | [diff] [blame] | 960 | attrcount += ret; |
Jonathan Cameron | 847ec80 | 2009-08-18 18:06:19 +0100 | [diff] [blame] | 961 | } |
| 962 | |
Jonathan Cameron | f8c6f4e | 2011-10-06 17:14:35 +0100 | [diff] [blame] | 963 | indio_dev->event_interface->group.name = iio_event_group_name; |
| 964 | indio_dev->event_interface->group.attrs = |
| 965 | kzalloc(sizeof(indio_dev->event_interface->group.attrs[0]) |
Jonathan Cameron | 26d25ae | 2011-09-02 17:14:40 +0100 | [diff] [blame] | 966 | *(attrcount + 1), |
| 967 | GFP_KERNEL); |
Jonathan Cameron | f8c6f4e | 2011-10-06 17:14:35 +0100 | [diff] [blame] | 968 | if (indio_dev->event_interface->group.attrs == NULL) { |
Jonathan Cameron | 26d25ae | 2011-09-02 17:14:40 +0100 | [diff] [blame] | 969 | ret = -ENOMEM; |
| 970 | goto error_free_setup_event_lines; |
| 971 | } |
Jonathan Cameron | f8c6f4e | 2011-10-06 17:14:35 +0100 | [diff] [blame] | 972 | if (indio_dev->info->event_attrs) |
| 973 | memcpy(indio_dev->event_interface->group.attrs, |
| 974 | indio_dev->info->event_attrs->attrs, |
| 975 | sizeof(indio_dev->event_interface->group.attrs[0]) |
Jonathan Cameron | 26d25ae | 2011-09-02 17:14:40 +0100 | [diff] [blame] | 976 | *attrcount_orig); |
| 977 | attrn = attrcount_orig; |
| 978 | /* Add all elements from the list. */ |
| 979 | list_for_each_entry(p, |
Jonathan Cameron | f8c6f4e | 2011-10-06 17:14:35 +0100 | [diff] [blame] | 980 | &indio_dev->event_interface->dev_attr_list, |
Jonathan Cameron | 26d25ae | 2011-09-02 17:14:40 +0100 | [diff] [blame] | 981 | l) |
Jonathan Cameron | f8c6f4e | 2011-10-06 17:14:35 +0100 | [diff] [blame] | 982 | indio_dev->event_interface->group.attrs[attrn++] = |
Jonathan Cameron | 26d25ae | 2011-09-02 17:14:40 +0100 | [diff] [blame] | 983 | &p->dev_attr.attr; |
Jonathan Cameron | f8c6f4e | 2011-10-06 17:14:35 +0100 | [diff] [blame] | 984 | indio_dev->groups[indio_dev->groupcounter++] = |
| 985 | &indio_dev->event_interface->group; |
Jonathan Cameron | 26d25ae | 2011-09-02 17:14:40 +0100 | [diff] [blame] | 986 | |
Jonathan Cameron | 847ec80 | 2009-08-18 18:06:19 +0100 | [diff] [blame] | 987 | return 0; |
| 988 | |
Jonathan Cameron | cc2439f | 2011-08-12 16:55:30 +0100 | [diff] [blame] | 989 | error_free_setup_event_lines: |
Jonathan Cameron | f8c6f4e | 2011-10-06 17:14:35 +0100 | [diff] [blame] | 990 | __iio_remove_event_config_attrs(indio_dev); |
| 991 | kfree(indio_dev->event_interface); |
Jonathan Cameron | 847ec80 | 2009-08-18 18:06:19 +0100 | [diff] [blame] | 992 | error_ret: |
| 993 | |
| 994 | return ret; |
| 995 | } |
| 996 | |
Jonathan Cameron | f8c6f4e | 2011-10-06 17:14:35 +0100 | [diff] [blame] | 997 | static void iio_device_unregister_eventset(struct iio_dev *indio_dev) |
Jonathan Cameron | 847ec80 | 2009-08-18 18:06:19 +0100 | [diff] [blame] | 998 | { |
Jonathan Cameron | f8c6f4e | 2011-10-06 17:14:35 +0100 | [diff] [blame] | 999 | if (indio_dev->event_interface == NULL) |
Jonathan Cameron | 847ec80 | 2009-08-18 18:06:19 +0100 | [diff] [blame] | 1000 | return; |
Jonathan Cameron | f8c6f4e | 2011-10-06 17:14:35 +0100 | [diff] [blame] | 1001 | __iio_remove_event_config_attrs(indio_dev); |
| 1002 | kfree(indio_dev->event_interface->group.attrs); |
| 1003 | kfree(indio_dev->event_interface); |
Jonathan Cameron | 847ec80 | 2009-08-18 18:06:19 +0100 | [diff] [blame] | 1004 | } |
| 1005 | |
| 1006 | static void iio_dev_release(struct device *device) |
| 1007 | { |
Jonathan Cameron | f8c6f4e | 2011-10-06 17:14:35 +0100 | [diff] [blame] | 1008 | struct iio_dev *indio_dev = container_of(device, struct iio_dev, dev); |
| 1009 | cdev_del(&indio_dev->chrdev); |
| 1010 | if (indio_dev->modes & INDIO_BUFFER_TRIGGERED) |
| 1011 | iio_device_unregister_trigger_consumer(indio_dev); |
| 1012 | iio_device_unregister_eventset(indio_dev); |
| 1013 | iio_device_unregister_sysfs(indio_dev); |
Jonathan Cameron | 847ec80 | 2009-08-18 18:06:19 +0100 | [diff] [blame] | 1014 | } |
| 1015 | |
| 1016 | static struct device_type iio_dev_type = { |
| 1017 | .name = "iio_device", |
| 1018 | .release = iio_dev_release, |
| 1019 | }; |
| 1020 | |
Jonathan Cameron | 6f7c8ee | 2011-04-15 18:55:56 +0100 | [diff] [blame] | 1021 | struct iio_dev *iio_allocate_device(int sizeof_priv) |
Jonathan Cameron | 847ec80 | 2009-08-18 18:06:19 +0100 | [diff] [blame] | 1022 | { |
Jonathan Cameron | 6f7c8ee | 2011-04-15 18:55:56 +0100 | [diff] [blame] | 1023 | struct iio_dev *dev; |
| 1024 | size_t alloc_size; |
| 1025 | |
| 1026 | alloc_size = sizeof(struct iio_dev); |
| 1027 | if (sizeof_priv) { |
| 1028 | alloc_size = ALIGN(alloc_size, IIO_ALIGN); |
| 1029 | alloc_size += sizeof_priv; |
| 1030 | } |
| 1031 | /* ensure 32-byte alignment of whole construct ? */ |
| 1032 | alloc_size += IIO_ALIGN - 1; |
| 1033 | |
| 1034 | dev = kzalloc(alloc_size, GFP_KERNEL); |
Jonathan Cameron | 847ec80 | 2009-08-18 18:06:19 +0100 | [diff] [blame] | 1035 | |
| 1036 | if (dev) { |
Jonathan Cameron | 26d25ae | 2011-09-02 17:14:40 +0100 | [diff] [blame] | 1037 | dev->dev.groups = dev->groups; |
Jonathan Cameron | 847ec80 | 2009-08-18 18:06:19 +0100 | [diff] [blame] | 1038 | dev->dev.type = &iio_dev_type; |
Jonathan Cameron | 5aaaeba | 2010-05-04 14:43:00 +0100 | [diff] [blame] | 1039 | dev->dev.bus = &iio_bus_type; |
Jonathan Cameron | 847ec80 | 2009-08-18 18:06:19 +0100 | [diff] [blame] | 1040 | device_initialize(&dev->dev); |
| 1041 | dev_set_drvdata(&dev->dev, (void *)dev); |
| 1042 | mutex_init(&dev->mlock); |
Jonathan Cameron | a9e39f9 | 2011-09-14 13:01:25 +0100 | [diff] [blame] | 1043 | |
| 1044 | dev->id = ida_simple_get(&iio_ida, 0, 0, GFP_KERNEL); |
| 1045 | if (dev->id < 0) { |
| 1046 | /* cannot use a dev_err as the name isn't available */ |
| 1047 | printk(KERN_ERR "Failed to get id\n"); |
| 1048 | kfree(dev); |
| 1049 | return NULL; |
| 1050 | } |
| 1051 | dev_set_name(&dev->dev, "iio:device%d", dev->id); |
Jonathan Cameron | 847ec80 | 2009-08-18 18:06:19 +0100 | [diff] [blame] | 1052 | } |
| 1053 | |
| 1054 | return dev; |
| 1055 | } |
| 1056 | EXPORT_SYMBOL(iio_allocate_device); |
| 1057 | |
| 1058 | void iio_free_device(struct iio_dev *dev) |
| 1059 | { |
Jonathan Cameron | a9e39f9 | 2011-09-14 13:01:25 +0100 | [diff] [blame] | 1060 | if (dev) { |
| 1061 | ida_simple_remove(&iio_ida, dev->id); |
Jonathan Cameron | 1aa0427 | 2011-08-30 12:32:47 +0100 | [diff] [blame] | 1062 | kfree(dev); |
Jonathan Cameron | a9e39f9 | 2011-09-14 13:01:25 +0100 | [diff] [blame] | 1063 | } |
Jonathan Cameron | 847ec80 | 2009-08-18 18:06:19 +0100 | [diff] [blame] | 1064 | } |
| 1065 | EXPORT_SYMBOL(iio_free_device); |
| 1066 | |
Jonathan Cameron | 1aa0427 | 2011-08-30 12:32:47 +0100 | [diff] [blame] | 1067 | /** |
Jonathan Cameron | 14555b1 | 2011-09-21 11:15:57 +0100 | [diff] [blame] | 1068 | * iio_chrdev_open() - chrdev file open for buffer access and ioctls |
Jonathan Cameron | 1aa0427 | 2011-08-30 12:32:47 +0100 | [diff] [blame] | 1069 | **/ |
| 1070 | static int iio_chrdev_open(struct inode *inode, struct file *filp) |
| 1071 | { |
Jonathan Cameron | f8c6f4e | 2011-10-06 17:14:35 +0100 | [diff] [blame] | 1072 | struct iio_dev *indio_dev = container_of(inode->i_cdev, |
Jonathan Cameron | 1aa0427 | 2011-08-30 12:32:47 +0100 | [diff] [blame] | 1073 | struct iio_dev, chrdev); |
Jonathan Cameron | f8c6f4e | 2011-10-06 17:14:35 +0100 | [diff] [blame] | 1074 | filp->private_data = indio_dev; |
Jonathan Cameron | 30eb82f | 2011-09-21 11:16:02 +0100 | [diff] [blame] | 1075 | |
Jonathan Cameron | f8c6f4e | 2011-10-06 17:14:35 +0100 | [diff] [blame] | 1076 | return iio_chrdev_buffer_open(indio_dev); |
Jonathan Cameron | 1aa0427 | 2011-08-30 12:32:47 +0100 | [diff] [blame] | 1077 | } |
| 1078 | |
| 1079 | /** |
Jonathan Cameron | 14555b1 | 2011-09-21 11:15:57 +0100 | [diff] [blame] | 1080 | * iio_chrdev_release() - chrdev file close buffer access and ioctls |
Jonathan Cameron | 1aa0427 | 2011-08-30 12:32:47 +0100 | [diff] [blame] | 1081 | **/ |
| 1082 | static int iio_chrdev_release(struct inode *inode, struct file *filp) |
| 1083 | { |
Jonathan Cameron | 14555b1 | 2011-09-21 11:15:57 +0100 | [diff] [blame] | 1084 | iio_chrdev_buffer_release(container_of(inode->i_cdev, |
Jonathan Cameron | 1aa0427 | 2011-08-30 12:32:47 +0100 | [diff] [blame] | 1085 | struct iio_dev, chrdev)); |
| 1086 | return 0; |
| 1087 | } |
| 1088 | |
| 1089 | /* Somewhat of a cross file organization violation - ioctls here are actually |
| 1090 | * event related */ |
| 1091 | static long iio_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) |
| 1092 | { |
| 1093 | struct iio_dev *indio_dev = filp->private_data; |
| 1094 | int __user *ip = (int __user *)arg; |
| 1095 | int fd; |
| 1096 | |
| 1097 | if (cmd == IIO_GET_EVENT_FD_IOCTL) { |
| 1098 | fd = iio_event_getfd(indio_dev); |
| 1099 | if (copy_to_user(ip, &fd, sizeof(fd))) |
| 1100 | return -EFAULT; |
| 1101 | return 0; |
| 1102 | } |
| 1103 | return -EINVAL; |
| 1104 | } |
| 1105 | |
Jonathan Cameron | 14555b1 | 2011-09-21 11:15:57 +0100 | [diff] [blame] | 1106 | static const struct file_operations iio_buffer_fileops = { |
| 1107 | .read = iio_buffer_read_first_n_outer_addr, |
Jonathan Cameron | 1aa0427 | 2011-08-30 12:32:47 +0100 | [diff] [blame] | 1108 | .release = iio_chrdev_release, |
| 1109 | .open = iio_chrdev_open, |
Jonathan Cameron | 14555b1 | 2011-09-21 11:15:57 +0100 | [diff] [blame] | 1110 | .poll = iio_buffer_poll_addr, |
Jonathan Cameron | 1aa0427 | 2011-08-30 12:32:47 +0100 | [diff] [blame] | 1111 | .owner = THIS_MODULE, |
| 1112 | .llseek = noop_llseek, |
| 1113 | .unlocked_ioctl = iio_ioctl, |
| 1114 | .compat_ioctl = iio_ioctl, |
| 1115 | }; |
| 1116 | |
Jonathan Cameron | f8c6f4e | 2011-10-06 17:14:35 +0100 | [diff] [blame] | 1117 | int iio_device_register(struct iio_dev *indio_dev) |
Jonathan Cameron | 847ec80 | 2009-08-18 18:06:19 +0100 | [diff] [blame] | 1118 | { |
| 1119 | int ret; |
| 1120 | |
Jonathan Cameron | 1aa0427 | 2011-08-30 12:32:47 +0100 | [diff] [blame] | 1121 | /* configure elements for the chrdev */ |
Jonathan Cameron | f8c6f4e | 2011-10-06 17:14:35 +0100 | [diff] [blame] | 1122 | indio_dev->dev.devt = MKDEV(MAJOR(iio_devt), indio_dev->id); |
Jonathan Cameron | 847ec80 | 2009-08-18 18:06:19 +0100 | [diff] [blame] | 1123 | |
Jonathan Cameron | f8c6f4e | 2011-10-06 17:14:35 +0100 | [diff] [blame] | 1124 | ret = iio_device_register_sysfs(indio_dev); |
Jonathan Cameron | 847ec80 | 2009-08-18 18:06:19 +0100 | [diff] [blame] | 1125 | if (ret) { |
Jonathan Cameron | f8c6f4e | 2011-10-06 17:14:35 +0100 | [diff] [blame] | 1126 | dev_err(indio_dev->dev.parent, |
Jonathan Cameron | 847ec80 | 2009-08-18 18:06:19 +0100 | [diff] [blame] | 1127 | "Failed to register sysfs interfaces\n"); |
Jonathan Cameron | a9e39f9 | 2011-09-14 13:01:25 +0100 | [diff] [blame] | 1128 | goto error_ret; |
Jonathan Cameron | 847ec80 | 2009-08-18 18:06:19 +0100 | [diff] [blame] | 1129 | } |
Jonathan Cameron | f8c6f4e | 2011-10-06 17:14:35 +0100 | [diff] [blame] | 1130 | ret = iio_device_register_eventset(indio_dev); |
Jonathan Cameron | 847ec80 | 2009-08-18 18:06:19 +0100 | [diff] [blame] | 1131 | if (ret) { |
Jonathan Cameron | f8c6f4e | 2011-10-06 17:14:35 +0100 | [diff] [blame] | 1132 | dev_err(indio_dev->dev.parent, |
Roel Van Nyen | c849d25 | 2010-04-29 19:27:31 +0200 | [diff] [blame] | 1133 | "Failed to register event set\n"); |
Jonathan Cameron | 847ec80 | 2009-08-18 18:06:19 +0100 | [diff] [blame] | 1134 | goto error_free_sysfs; |
| 1135 | } |
Jonathan Cameron | f8c6f4e | 2011-10-06 17:14:35 +0100 | [diff] [blame] | 1136 | if (indio_dev->modes & INDIO_BUFFER_TRIGGERED) |
| 1137 | iio_device_register_trigger_consumer(indio_dev); |
Jonathan Cameron | 847ec80 | 2009-08-18 18:06:19 +0100 | [diff] [blame] | 1138 | |
Jonathan Cameron | f8c6f4e | 2011-10-06 17:14:35 +0100 | [diff] [blame] | 1139 | ret = device_add(&indio_dev->dev); |
Jonathan Cameron | 26d25ae | 2011-09-02 17:14:40 +0100 | [diff] [blame] | 1140 | if (ret < 0) |
| 1141 | goto error_unreg_eventset; |
Jonathan Cameron | f8c6f4e | 2011-10-06 17:14:35 +0100 | [diff] [blame] | 1142 | cdev_init(&indio_dev->chrdev, &iio_buffer_fileops); |
| 1143 | indio_dev->chrdev.owner = indio_dev->info->driver_module; |
| 1144 | ret = cdev_add(&indio_dev->chrdev, indio_dev->dev.devt, 1); |
Jonathan Cameron | 26d25ae | 2011-09-02 17:14:40 +0100 | [diff] [blame] | 1145 | if (ret < 0) |
| 1146 | goto error_del_device; |
Jonathan Cameron | 847ec80 | 2009-08-18 18:06:19 +0100 | [diff] [blame] | 1147 | return 0; |
| 1148 | |
Jonathan Cameron | 847ec80 | 2009-08-18 18:06:19 +0100 | [diff] [blame] | 1149 | error_del_device: |
Jonathan Cameron | f8c6f4e | 2011-10-06 17:14:35 +0100 | [diff] [blame] | 1150 | device_del(&indio_dev->dev); |
Jonathan Cameron | 26d25ae | 2011-09-02 17:14:40 +0100 | [diff] [blame] | 1151 | error_unreg_eventset: |
Jonathan Cameron | f8c6f4e | 2011-10-06 17:14:35 +0100 | [diff] [blame] | 1152 | iio_device_unregister_eventset(indio_dev); |
Jonathan Cameron | 26d25ae | 2011-09-02 17:14:40 +0100 | [diff] [blame] | 1153 | error_free_sysfs: |
Jonathan Cameron | f8c6f4e | 2011-10-06 17:14:35 +0100 | [diff] [blame] | 1154 | iio_device_unregister_sysfs(indio_dev); |
Jonathan Cameron | 847ec80 | 2009-08-18 18:06:19 +0100 | [diff] [blame] | 1155 | error_ret: |
| 1156 | return ret; |
| 1157 | } |
| 1158 | EXPORT_SYMBOL(iio_device_register); |
| 1159 | |
Jonathan Cameron | f8c6f4e | 2011-10-06 17:14:35 +0100 | [diff] [blame] | 1160 | void iio_device_unregister(struct iio_dev *indio_dev) |
Jonathan Cameron | 847ec80 | 2009-08-18 18:06:19 +0100 | [diff] [blame] | 1161 | { |
Jonathan Cameron | f8c6f4e | 2011-10-06 17:14:35 +0100 | [diff] [blame] | 1162 | device_unregister(&indio_dev->dev); |
Jonathan Cameron | 847ec80 | 2009-08-18 18:06:19 +0100 | [diff] [blame] | 1163 | } |
| 1164 | EXPORT_SYMBOL(iio_device_unregister); |
Jonathan Cameron | 847ec80 | 2009-08-18 18:06:19 +0100 | [diff] [blame] | 1165 | subsys_initcall(iio_init); |
| 1166 | module_exit(iio_exit); |
| 1167 | |
| 1168 | MODULE_AUTHOR("Jonathan Cameron <jic23@cam.ac.uk>"); |
| 1169 | MODULE_DESCRIPTION("Industrial I/O core"); |
| 1170 | MODULE_LICENSE("GPL"); |