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 sr_global *global;
  25
  26 GSList *devices = NULL;
  27
  28 void device_scan(void)
  29 {
  30         GSList *plugins, *l;
  31         struct sr_device_plugin *plugin;
  32
  33         plugins = list_hwplugins();
  34
  35         /*
  36          * Initialize all plugins first. Since the init() call may involve
  37          * a firmware upload and associated delay, we may as well get all
  38          * of these out of the way first.
  39          */
  40         for (l = plugins; l; l = l->next) {
  41                 plugin = l->data;
  42                 device_plugin_init(plugin);
  43         }
  44
  45 }
  46
  47 int device_plugin_init(struct sr_device_plugin *plugin)
  48 {
  49         int num_devices, num_probes, i;
  50
  51         g_message("initializing %s plugin", plugin->name);
  52         num_devices = plugin->init(NULL);
  53         for (i = 0; i < num_devices; i++) {
  54                 num_probes = (int)plugin->get_device_info(i, SR_DI_NUM_PROBES);
  55                 device_new(plugin, i, num_probes);
  56         }
  57
  58         return num_devices;
  59 }
  60
  61 void device_close_all(void)
  62 {
  63         struct sr_device *device;
  64
  65         while (devices) {
  66                 device = devices->data;
  67                 if (device->plugin)
  68                         device->plugin->close(device->plugin_index);
  69                 device_destroy(device);
  70         }
  71 }
  72
  73 GSList *device_list(void)
  74 {
  75
  76         if (!devices)
  77                 device_scan();
  78
  79         return devices;
  80 }
  81
  82 struct sr_device *device_new(struct sr_device_plugin *plugin, int plugin_index,
  83                              int num_probes)
  84 {
  85         struct sr_device *device;
  86         int i;
  87
  88         device = g_malloc0(sizeof(struct sr_device));
  89         device->plugin = plugin;
  90         device->plugin_index = plugin_index;
  91         devices = g_slist_append(devices, device);
  92
  93         for (i = 0; i < num_probes; i++)
  94                 device_probe_add(device, NULL);
  95
  96         return device;
  97 }
  98
  99 void device_clear(struct sr_device *device)
 100 {
 101         unsigned int pnum;
 102
 103         /* TODO: Plugin-specific clear call? */
 104
 105         if (!device->probes)
 106                 return;
 107
 108         for (pnum = 1; pnum <= g_slist_length(device->probes); pnum++)
 109                 device_probe_clear(device, pnum);
 110 }
 111
 112 void device_destroy(struct sr_device *device)
 113 {
 114         unsigned int pnum;
 115
 116         /*
 117          * TODO: Plugin-specific destroy call, need to decrease refcount
 118          * in plugin.
 119          */
 120
 121         devices = g_slist_remove(devices, device);
 122         if (device->probes) {
 123                 for (pnum = 1; pnum <= g_slist_length(device->probes); pnum++)
 124                         device_probe_clear(device, pnum);
 125                 g_slist_free(device->probes);
 126         }
 127         g_free(device);
 128 }
 129
 130 void device_probe_clear(struct sr_device *device, int probenum)
 131 {
 132         struct probe *p;
 133
 134         p = probe_find(device, probenum);
 135         if (!p)
 136                 return;
 137
 138         if (p->name) {
 139                 g_free(p->name);
 140                 p->name = NULL;
 141         }
 142
 143         if (p->trigger) {
 144                 g_free(p->trigger);
 145                 p->trigger = NULL;
 146         }
 147 }
 148
 149 void device_probe_add(struct sr_device *device, char *name)
 150 {
 151         struct probe *p;
 152         char probename[16];
 153         int probenum;
 154
 155         probenum = g_slist_length(device->probes) + 1;
 156         p = g_malloc0(sizeof(struct probe));
 157         p->index = probenum;
 158         p->enabled = TRUE;
 159         if (name) {
 160                 p->name = g_strdup(name);
 161         } else {
 162                 snprintf(probename, 16, "%d", probenum);
 163                 p->name = g_strdup(probename);
 164         }
 165         p->name = g_strdup(name);
 166         p->trigger = NULL;
 167         device->probes = g_slist_append(device->probes, p);
 168 }
 169
 170 struct probe *probe_find(struct sr_device *device, int probenum)
 171 {
 172         GSList *l;
 173         struct probe *p, *found_probe;
 174
 175         found_probe = NULL;
 176         for (l = device->probes; l; l = l->next) {
 177                 p = l->data;
 178                 if (p->index == probenum) {
 179                         found_probe = p;
 180                         break;
 181                 }
 182         }
 183
 184         return found_probe;
 185 }
 186
 187 /* TODO: return SIGROK_ERR if probenum not found */
 188 void device_probe_name(struct sr_device *device, int probenum, char *name)
 189 {
 190         struct probe *p;
 191
 192         p = probe_find(device, probenum);
 193         if (!p)
 194                 return;
 195
 196         if (p->name)
 197                 g_free(p->name);
 198         p->name = g_strdup(name);
 199 }
 200
 201 /* TODO: return SIGROK_ERR if probenum not found */
 202 void device_trigger_clear(struct sr_device *device)
 203 {
 204         struct probe *p;
 205         unsigned int pnum;
 206
 207         if (!device->probes)
 208                 return;
 209
 210         for (pnum = 1; pnum <= g_slist_length(device->probes); pnum++) {
 211                 p = probe_find(device, pnum);
 212                 if (p && p->trigger) {
 213                         g_free(p->trigger);
 214                         p->trigger = NULL;
 215                 }
 216         }
 217 }
 218
 219 /* TODO: return SIGROK_ERR if probenum not found */
 220 void device_trigger_set(struct sr_device *device, int probenum, char *trigger)
 221 {
 222         struct probe *p;
 223
 224         p = probe_find(device, probenum);
 225         if (!p)
 226                 return;
 227
 228         if (p->trigger)
 229                 g_free(p->trigger);
 230
 231         p->trigger = g_strdup(trigger);
 232
 233 }
 234
 235 gboolean device_has_hwcap(struct sr_device *device, int hwcap)
 236 {
 237         int *capabilities, i;
 238
 239         if ((capabilities = device->plugin->get_capabilities()))
 240                 for (i = 0; capabilities[i]; i++)
 241                         if (capabilities[i] == hwcap)
 242                                 return TRUE;
 243
 244         return FALSE;
 245 }