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