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 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 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, 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 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 device *device_new(struct device_plugin *plugin, int plugin_index,
  83                           int num_probes)
  84 {
  85         struct device *device;
  86         int i;
  87         char probename[16];
  88
  89         device = g_malloc0(sizeof(struct device));
  90         device->plugin = plugin;
  91         device->plugin_index = plugin_index;
  92         devices = g_slist_append(devices, device);
  93
  94         for (i = 0; i < num_probes; i++) {
  95                 snprintf(probename, 16, "%d", i + 1);
  96                 device_probe_add(device, probename);
  97         }
  98
  99         return device;
 100 }
 101
 102 void device_clear(struct device *device)
 103 {
 104         unsigned int pnum;
 105
 106         /* TODO: Plugin-specific clear call? */
 107
 108         if (!device->probes)
 109                 return;
 110
 111         for (pnum = 1; pnum <= g_slist_length(device->probes); pnum++)
 112                 device_probe_clear(device, pnum);
 113 }
 114
 115 void device_destroy(struct device *device)
 116 {
 117         unsigned int pnum;
 118
 119         /*
 120          * TODO: Plugin-specific destroy call, need to decrease refcount
 121          * in plugin.
 122          */
 123
 124         devices = g_slist_remove(devices, device);
 125         if (device->probes) {
 126                 for (pnum = 1; pnum <= g_slist_length(device->probes); pnum++)
 127                         device_probe_clear(device, pnum);
 128                 g_slist_free(device->probes);
 129         }
 130         g_free(device);
 131 }
 132
 133 void device_probe_clear(struct device *device, int probenum)
 134 {
 135         struct probe *p;
 136
 137         p = probe_find(device, probenum);
 138         if (!p)
 139                 return;
 140
 141         if (p->name) {
 142                 g_free(p->name);
 143                 p->name = NULL;
 144         }
 145
 146         if (p->trigger) {
 147                 g_free(p->trigger);
 148                 p->trigger = NULL;
 149         }
 150 }
 151
 152 void device_probe_add(struct device *device, char *name)
 153 {
 154         struct probe *p;
 155
 156         p = g_malloc0(sizeof(struct probe));
 157         p->index = g_slist_length(device->probes) + 1;
 158         p->enabled = TRUE;
 159         p->name = g_strdup(name);
 160         p->trigger = NULL;
 161         device->probes = g_slist_append(device->probes, p);
 162 }
 163
 164 struct probe *probe_find(struct device *device, int probenum)
 165 {
 166         GSList *l;
 167         struct probe *p, *found_probe;
 168
 169         found_probe = NULL;
 170         for (l = device->probes; l; l = l->next) {
 171                 p = l->data;
 172                 if (p->index == probenum) {
 173                         found_probe = p;
 174                         break;
 175                 }
 176         }
 177
 178         return found_probe;
 179 }
 180
 181 void device_probe_name(struct device *device, int probenum, char *name)
 182 {
 183         struct probe *p;
 184
 185         p = probe_find(device, probenum);
 186         if (!p)
 187                 return;
 188
 189         if (p->name)
 190                 g_free(p->name);
 191         p->name = g_strdup(name);
 192 }
 193
 194 void device_trigger_clear(struct device *device)
 195 {
 196         struct probe *p;
 197         unsigned int pnum;
 198
 199         if (!device->probes)
 200                 return;
 201
 202         for (pnum = 1; pnum <= g_slist_length(device->probes); pnum++) {
 203                 p = probe_find(device, pnum);
 204                 if (p && p->trigger) {
 205                         g_free(p->trigger);
 206                         p->trigger = NULL;
 207                 }
 208         }
 209 }
 210
 211 void device_trigger_set(struct device *device, int probenum, char *trigger)
 212 {
 213         struct probe *p;
 214
 215         p = probe_find(device, probenum);
 216         if (!p)
 217                 return;
 218
 219         if (p->trigger)
 220                 g_free(p->trigger);
 221
 222         p->trigger = g_strdup(trigger);
 223 }