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, probe_type;
  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                         probe_type = (int)(unsigned long)
  50                                 plugin->get_device_info(i, DI_PROBE_TYPE);
  51
  52                         if (probe_type != PROBE_TYPE_ANALOG)
  53                                 probe_type = PROBE_TYPE_LOGIC;
  54
  55                         device_new(plugin, i, num_probes, probe_type);
  56                 }
  57         }
  58 }
  59
  60 void device_close_all(void)
  61 {
  62         struct device *device;
  63
  64         while (devices) {
  65                 device = devices->data;
  66                 if (device->plugin)
  67                         device->plugin->close(device->plugin_index);
  68                 device_destroy(device);
  69         }
  70 }
  71
  72 GSList *device_list(void)
  73 {
  74         return devices;
  75 }
  76
  77 struct device *device_new(struct device_plugin *plugin, int plugin_index,
  78                           int num_probes, int probe_type)
  79 {
  80         struct device *device;
  81         int i;
  82         char probename[16];
  83
  84         device = g_malloc0(sizeof(struct device));
  85         device->plugin = plugin;
  86         device->plugin_index = plugin_index;
  87         device->probe_type = probe_type;
  88         devices = g_slist_append(devices, device);
  89
  90         for (i = 0; i < num_probes; i++) {
  91                 snprintf(probename, 16, "%d", i + 1);
  92                 device_probe_add(device, probename);
  93         }
  94
  95         return device;
  96 }
  97
  98 void device_clear(struct device *device)
  99 {
 100         unsigned int pnum;
 101
 102         /* TODO: Plugin-specific clear call? */
 103
 104         if (!device->probes)
 105                 return;
 106
 107         for (pnum = 1; pnum <= g_slist_length(device->probes); pnum++)
 108                 device_probe_clear(device, pnum);
 109 }
 110
 111 void device_destroy(struct device *device)
 112 {
 113         unsigned int pnum;
 114
 115         /*
 116          * TODO: Plugin-specific destroy call, need to decrease refcount
 117          * in plugin.
 118          */
 119
 120         devices = g_slist_remove(devices, device);
 121         if (device->probes) {
 122                 for (pnum = 1; pnum <= g_slist_length(device->probes); pnum++)
 123                         device_probe_clear(device, pnum);
 124                 g_slist_free(device->probes);
 125         }
 126         g_free(device);
 127 }
 128
 129 void device_probe_clear(struct device *device, int probenum)
 130 {
 131         struct probe *p;
 132
 133         p = probe_find(device, probenum);
 134         if (!p)
 135                 return;
 136
 137         if (p->name) {
 138                 g_free(p->name);
 139                 p->name = NULL;
 140         }
 141
 142         if (p->trigger) {
 143                 g_free(p->trigger);
 144                 p->trigger = NULL;
 145         }
 146 }
 147
 148 void device_probe_add(struct device *device, char *name)
 149 {
 150         struct probe *p;
 151
 152         p = g_malloc0(sizeof(struct probe));
 153         p->index = g_slist_length(device->probes) + 1;
 154         p->enabled = TRUE;
 155         p->name = g_strdup(name);
 156         p->trigger = NULL;
 157         device->probes = g_slist_append(device->probes, p);
 158 }
 159
 160 struct probe *probe_find(struct device *device, int probenum)
 161 {
 162         GSList *l;
 163         struct probe *p, *found_probe;
 164
 165         found_probe = NULL;
 166         for (l = device->probes; l; l = l->next) {
 167                 p = l->data;
 168                 if (p->index == probenum) {
 169                         found_probe = p;
 170                         break;
 171                 }
 172         }
 173
 174         return found_probe;
 175 }
 176
 177 void device_probe_name(struct device *device, int probenum, char *name)
 178 {
 179         struct probe *p;
 180
 181         p = probe_find(device, probenum);
 182         if (!p)
 183                 return;
 184
 185         if (p->name)
 186                 g_free(p->name);
 187         p->name = g_strdup(name);
 188 }
 189
 190 void device_trigger_clear(struct device *device)
 191 {
 192         struct probe *p;
 193         unsigned int pnum;
 194
 195         if (!device->probes)
 196                 return;
 197
 198         for (pnum = 1; pnum <= g_slist_length(device->probes); pnum++) {
 199                 p = probe_find(device, pnum);
 200                 if (p && p->trigger) {
 201                         g_free(p->trigger);
 202                         p->trigger = NULL;
 203                 }
 204         }
 205 }
 206
 207 void device_trigger_set(struct device *device, int probenum, char *trigger)
 208 {
 209         struct probe *p;
 210
 211         p = probe_find(device, probenum);
 212         if (!p)
 213                 return;
 214
 215         if (p->trigger)
 216                 g_free(p->trigger);
 217
 218         p->trigger = g_strdup(trigger);
 219 }