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
  47                           = (int)(unsigned long)plugin->get_device_info(i,
  48                             DI_NUM_PROBES);
  49                         device_new(plugin, i, num_probes);
  50                 }
  51         }
  52 }
  53
  54 void device_close_all(void)
  55 {
  56         struct device *device;
  57
  58         while (devices) {
  59                 device = devices->data;
  60                 if (device->plugin)
  61                         device->plugin->close(device->plugin_index);
  62                 device_destroy(device);
  63         }
  64 }
  65
  66 GSList *device_list(void)
  67 {
  68         return devices;
  69 }
  70
  71 struct device *device_new(struct device_plugin *plugin, int plugin_index,
  72                           int num_probes)
  73 {
  74         struct device *device;
  75         int i;
  76         char probename[16];
  77
  78         device = g_malloc0(sizeof(struct device));
  79         device->plugin = plugin;
  80         device->plugin_index = plugin_index;
  81         devices = g_slist_append(devices, device);
  82
  83         for (i = 0; i < num_probes; i++) {
  84                 snprintf(probename, 16, "%d", i + 1);
  85                 device_probe_add(device, probename);
  86         }
  87
  88         return device;
  89 }
  90
  91 void device_clear(struct device *device)
  92 {
  93         unsigned int pnum;
  94
  95         /* TODO: Plugin-specific clear call? */
  96
  97         if (!device->probes)
  98                 return;
  99
 100         for (pnum = 1; pnum <= g_slist_length(device->probes); pnum++)
 101                 device_probe_clear(device, pnum);
 102 }
 103
 104 void device_destroy(struct device *device)
 105 {
 106         unsigned int pnum;
 107
 108         /*
 109          * TODO: Plugin-specific destroy call, need to decrease refcount
 110          * in plugin.
 111          */
 112
 113         devices = g_slist_remove(devices, device);
 114         if (device->probes) {
 115                 for (pnum = 1; pnum <= g_slist_length(device->probes); pnum++)
 116                         device_probe_clear(device, pnum);
 117                 g_slist_free(device->probes);
 118         }
 119         g_free(device);
 120 }
 121
 122 void device_probe_clear(struct device *device, int probenum)
 123 {
 124         struct probe *p;
 125
 126         p = probe_find(device, probenum);
 127         if (!p)
 128                 return;
 129
 130         if (p->name) {
 131                 g_free(p->name);
 132                 p->name = NULL;
 133         }
 134
 135         if (p->trigger) {
 136                 g_free(p->trigger);
 137                 p->trigger = NULL;
 138         }
 139 }
 140
 141 void device_probe_add(struct device *device, char *name)
 142 {
 143         struct probe *p;
 144
 145         p = g_malloc0(sizeof(struct probe));
 146         p->index = g_slist_length(device->probes) + 1;
 147         p->enabled = TRUE;
 148         p->name = g_strdup(name);
 149         p->trigger = NULL;
 150         device->probes = g_slist_append(device->probes, p);
 151 }
 152
 153 struct probe *probe_find(struct device *device, int probenum)
 154 {
 155         GSList *l;
 156         struct probe *p, *found_probe;
 157
 158         found_probe = NULL;
 159         for (l = device->probes; l; l = l->next) {
 160                 p = l->data;
 161                 if (p->index == probenum) {
 162                         found_probe = p;
 163                         break;
 164                 }
 165         }
 166
 167         return found_probe;
 168 }
 169
 170 void device_probe_name(struct device *device, int probenum, char *name)
 171 {
 172         struct probe *p;
 173
 174         p = probe_find(device, probenum);
 175         if (!p)
 176                 return;
 177
 178         if (p->name)
 179                 g_free(p->name);
 180         p->name = g_strdup(name);
 181 }
 182
 183 void device_trigger_clear(struct device *device)
 184 {
 185         struct probe *p;
 186         unsigned int pnum;
 187
 188         if (!device->probes)
 189                 return;
 190
 191         for (pnum = 1; pnum <= g_slist_length(device->probes); pnum++) {
 192                 p = probe_find(device, pnum);
 193                 if (p && p->trigger) {
 194                         g_free(p->trigger);
 195                         p->trigger = NULL;
 196                 }
 197         }
 198 }
 199
 200 void device_trigger_set(struct device *device, int probenum, char *trigger)
 201 {
 202         struct probe *p;
 203
 204         p = probe_find(device, probenum);
 205         if (!p)
 206                 return;
 207
 208         if (p->trigger)
 209                 g_free(p->trigger);
 210
 211         p->trigger = g_strdup(trigger);
 212 }