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