device.c

   1 /*
   2  * This file is part of the sigrok project.
   3  *
   4  * Copyright (C) 2010 Bert Vermeulen <bert@biot.com>
   5  *
   6  * This program is free software: you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation, either version 3 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include <stdio.h>
  21 #include <glib.h>
  22 #include <sigrok.h>
  23
  24 extern struct sigrok_global *global;
  25
  26 GSList *devices = NULL;
  27
  28 void device_scan(void)
  29 {
  30         GSList *plugins, *l;
  31         struct device_plugin *plugin;
  32         int num_devices, num_probes, i;
  33
  34         plugins = list_hwplugins();
  35
  36         /*
  37          * Initialize all plugins first. Since the init() call may involve
  38          * a firmware upload and associated delay, we may as well get all
  39          * of these out of the way first.
  40          */
  41         for (l = plugins; l; l = l->next) {
  42                 plugin = l->data;
  43                 g_message("initializing %s plugin", plugin->name);
  44                 num_devices = plugin->init(NULL);
  45                 for (i = 0; i < num_devices; i++) {
  46                         num_probes = (int)plugin->get_device_info(i, DI_NUM_PROBES);
  47                         device_new(plugin, i, num_probes);
  48                 }
  49         }
  50 }
  51
  52 void device_close_all(void)
  53 {
  54         struct device *device;
  55
  56         while (devices) {
  57                 device = devices->data;
  58                 if (device->plugin)
  59                         device->plugin->close(device->plugin_index);
  60                 device_destroy(device);
  61         }
  62 }
  63
  64 GSList *device_list(void)
  65 {
  66         return devices;
  67 }
  68
  69 struct device *device_new(struct device_plugin *plugin, int plugin_index, int num_probes)
  70 {
  71         struct device *device;
  72         int i;
  73         char probename[16];
  74
  75         device = g_malloc0(sizeof(struct device));
  76         device->plugin = plugin;
  77         device->plugin_index = plugin_index;
  78         devices = g_slist_append(devices, device);
  79
  80         for (i = 0; i < num_probes; i++) {
  81                 snprintf(probename, 16, "%d", i + 1);
  82                 device_probe_add(device, probename);
  83         }
  84
  85         return device;
  86 }
  87
  88 void device_clear(struct device *device)
  89 {
  90         unsigned int pnum;
  91
  92         /* TODO: Plugin-specific clear call? */
  93
  94         if (!device->probes)
  95                 return;
  96
  97         for (pnum = 1; pnum <= g_slist_length(device->probes); pnum++)
  98                 device_probe_clear(device, pnum);
  99 }
 100
 101 void device_destroy(struct device *device)
 102 {
 103         unsigned int pnum;
 104
 105         /*
 106          * TODO: Plugin-specific destroy call, need to decrease refcount
 107          * in plugin.
 108          */
 109
 110         devices = g_slist_remove(devices, device);
 111         if (device->probes) {
 112                 for (pnum = 1; pnum <= g_slist_length(device->probes); pnum++)
 113                         device_probe_clear(device, pnum);
 114                 g_slist_free(device->probes);
 115         }
 116         g_free(device);
 117 }
 118
 119 void device_probe_clear(struct device *device, int probenum)
 120 {
 121         struct probe *p;
 122
 123         p = probe_find(device, probenum);
 124         if (!p)
 125                 return;
 126
 127         if (p->name) {
 128                 g_free(p->name);
 129                 p->name = NULL;
 130         }
 131
 132         if (p->trigger) {
 133                 g_free(p->trigger);
 134                 p->trigger = NULL;
 135         }
 136 }
 137
 138 void device_probe_add(struct device *device, char *name)
 139 {
 140         struct probe *p;
 141
 142         p = g_malloc0(sizeof(struct probe));
 143         p->index = g_slist_length(device->probes) + 1;
 144         p->enabled = TRUE;
 145         p->name = g_strdup(name);
 146         p->trigger = NULL;
 147         device->probes = g_slist_append(device->probes, p);
 148 }
 149
 150 struct probe *probe_find(struct device *device, int probenum)
 151 {
 152         GSList *l;
 153         struct probe *p, *found_probe;
 154
 155         found_probe = NULL;
 156         for (l = device->probes; l; l = l->next) {
 157                 p = l->data;
 158                 if (p->index == probenum) {
 159                         found_probe = p;
 160                         break;
 161                 }
 162         }
 163
 164         return found_probe;
 165 }
 166
 167 void device_probe_name(struct device *device, int probenum, char *name)
 168 {
 169         struct probe *p;
 170
 171         p = probe_find(device, probenum);
 172         if (!p)
 173                 return;
 174
 175         if (p->name)
 176                 g_free(p->name);
 177         p->name = g_strdup(name);
 178 }
 179
 180 void device_trigger_clear(struct device *device)
 181 {
 182         struct probe *p;
 183         unsigned int pnum;
 184
 185         if (!device->probes)
 186                 return;
 187
 188         for (pnum = 1; pnum <= g_slist_length(device->probes); pnum++) {
 189                 p = probe_find(device, pnum);
 190                 if (p && p->trigger) {
 191                         g_free(p->trigger);
 192                         p->trigger = NULL;
 193                 }
 194         }
 195 }
 196
 197 void device_trigger_set(struct device *device, int probenum, char *trigger)
 198 {
 199         struct probe *p;
 200
 201         p = probe_find(device, probenum);
 202         if (!p)
 203                 return;
 204
 205         if (p->trigger)
 206                 g_free(p->trigger);
 207
 208         p->trigger = g_strdup(trigger);
 209 }