| 1 | |
| 2 | |
| 3 | * /proc interface for comedi
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| 4 | *
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| 5 | * COMEDI - Linux Control and Measurement Device Interface
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| 6 | * Copyright (C) 1998 David A. Schleef <[email protected]>
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| 7 |
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| 8 |
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| 9 | |
| 10 | * This is some serious bloatware.
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| 11 | *
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| 12 | * Taken from Dave A.'s PCL-711 driver, 'cuz I thought it
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| 13 | * was cool.
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| 14 |
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| 15 |
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| 16 | #include <linux/comedi/comedidev.h>
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| 17 | #include "comedi_internal.h"
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| 18 | #include <linux/proc_fs.h>
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| 19 | #include <linux/seq_file.h>
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| 20 |
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| 21 | static int comedi_read(struct seq_file *m, void *v)
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| 22 | {
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| 23 | int i;
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| 24 | int devices_q = 0;
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| 25 | struct comedi_driver *driv;
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| 26 |
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| 27 | seq_printf(m, "comedi version " COMEDI_RELEASE "\nformat string: %s\n",
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| 28 | "\"%2d: %-20s %-20s %4d\", i, driver_name, board_name, n_subdevices");
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| 29 |
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| 30 | for (i = 0; i < COMEDI_NUM_BOARD_MINORS; i++) {
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| 31 | struct comedi_device *dev = comedi_dev_get_from_minor(i);
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| 32 |
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| 33 | if (!dev)
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| 34 | continue;
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| 35 |
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| 36 | down_read(&dev->attach_lock);
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| 37 | if (dev->attached) {
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| 38 | devices_q = 1;
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| 39 | seq_printf(m, "%2d: %-20s %-20s %4d\n",
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| 40 | i, dev->driver->driver_name,
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| 41 | dev->board_name, dev->n_subdevices);
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| 42 | }
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| 43 | up_read(&dev->attach_lock);
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| 44 | comedi_dev_put(dev);
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| 45 | }
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| 46 | if (!devices_q)
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| 47 | seq_puts(m, "no devices\n");
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| 48 |
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| 49 | mutex_lock(&comedi_drivers_list_lock);
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| 50 | for (driv = comedi_drivers; driv; driv = driv->next) {
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| 51 | seq_printf(m, "%s:\n", driv->driver_name);
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| 52 | for (i = 0; i < driv->num_names; i++)
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| 53 | seq_printf(m, " %s\n",
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| 54 | *(char **)((char *)driv->board_name +
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| 55 | i * driv->offset));
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| 56 |
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| 57 | if (!driv->num_names)
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| 58 | seq_printf(m, " %s\n", driv->driver_name);
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| 59 | }
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| 60 | mutex_unlock(&comedi_drivers_list_lock);
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| 61 |
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| 62 | return 0;
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| 63 | }
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| 64 |
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| 65 | void __init comedi_proc_init(void)
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| 66 | {
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| 67 | if (!proc_create_single("comedi", 0444, NULL, comedi_read))
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| 68 | pr_warn("comedi: unable to create proc entry\n");
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| 69 | }
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| 70 |
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| 71 | void comedi_proc_cleanup(void)
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| 72 | {
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| 73 | remove_proc_entry("comedi", NULL);
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| 74 | }
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