src/hardware/baylibre-acme/api.c

   1 /*
   2  * This file is part of the libsigrok project.
   3  *
   4  * Copyright (C) 2015 Bartosz Golaszewski <bgolaszewski@baylibre.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 "protocol.h"
  21
  22 SR_PRIV struct sr_dev_driver baylibre_acme_driver_info;
  23
  24 static const uint32_t devopts[] = {
  25         SR_CONF_CONTINUOUS | SR_CONF_SET,
  26         SR_CONF_LIMIT_SAMPLES | SR_CONF_GET | SR_CONF_SET,
  27         SR_CONF_LIMIT_MSEC | SR_CONF_GET | SR_CONF_SET,
  28         SR_CONF_SAMPLERATE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  29 };
  30
  31 static const uint32_t devopts_cg[] = {
  32         SR_CONF_PROBE_FACTOR | SR_CONF_GET | SR_CONF_SET,
  33         SR_CONF_POWER_OFF | SR_CONF_GET | SR_CONF_SET,
  34 };
  35
  36 #define MAX_SAMPLE_RATE 500 /* In Hz */
  37
  38 static const uint64_t samplerates[] = {
  39         SR_HZ(1),
  40         SR_HZ(MAX_SAMPLE_RATE),
  41         SR_HZ(1),
  42 };
  43
  44 static int init(struct sr_dev_driver *di, struct sr_context *sr_ctx)
  45 {
  46         return std_init(sr_ctx, di, LOG_PREFIX);
  47 }
  48
  49 static GSList *scan(struct sr_dev_driver *di, GSList *options)
  50 {
  51         struct drv_context *drvc;
  52         struct dev_context *devc;
  53         struct sr_dev_inst *sdi;
  54         GSList *devices;
  55         gboolean status;
  56         int i;
  57
  58         (void)options;
  59
  60         drvc = di->priv;
  61         devices = NULL;
  62
  63         devc = g_malloc0(sizeof(struct dev_context));
  64         devc->samplerate = SR_HZ(10);
  65
  66         sdi = g_malloc0(sizeof(struct sr_dev_inst));
  67         sdi->status = SR_ST_INACTIVE;
  68         sdi->vendor = g_strdup("BayLibre");
  69         sdi->model = g_strdup("ACME");
  70         sdi->driver = di;
  71         sdi->priv = devc;
  72
  73         status = bl_acme_is_sane();
  74         if (!status)
  75                 goto err_out;
  76
  77         /*
  78          * Iterate over all ACME connectors and check if any probes
  79          * are present.
  80          */
  81         for (i = 0; i < MAX_PROBES; i++) {
  82                 /*
  83                  * First check if there's an energy probe on this connector. If
  84                  * not, and we're already at the fifth probe - see if we can
  85                  * detect a temperature probe.
  86                  */
  87                 status = bl_acme_detect_probe(bl_acme_get_enrg_addr(i),
  88                                               PROBE_NUM(i), ENRG_PROBE_NAME);
  89                 if (status) {
  90                         /* Energy probe detected. */
  91                         status = bl_acme_register_probe(sdi, PROBE_ENRG,
  92                                         bl_acme_get_enrg_addr(i), PROBE_NUM(i));
  93                         if (!status) {
  94                                 sr_err("Error registering power probe %d",
  95                                        PROBE_NUM(i));
  96                                 continue;
  97                         }
  98                 } else if (i >= TEMP_PRB_START_INDEX) {
  99                         status = bl_acme_detect_probe(bl_acme_get_temp_addr(i),
 100                                               PROBE_NUM(i), TEMP_PROBE_NAME);
 101                         if (status) {
 102                                 /* Temperature probe detected. */
 103                                 status = bl_acme_register_probe(sdi,PROBE_TEMP,
 104                                         bl_acme_get_temp_addr(i), PROBE_NUM(i));
 105                                 if (!status) {
 106                                         sr_err("Error registering temp "
 107                                                "probe %d", PROBE_NUM(i));
 108                                         continue;
 109                                 }
 110                         }
 111                 }
 112         }
 113
 114         /*
 115          * Let's assume there's no ACME device present if no probe
 116          * has been registered.
 117          */
 118         if (sdi->channel_groups == NULL)
 119                 goto err_out;
 120
 121         devices = g_slist_append(devices, sdi);
 122         drvc->instances = g_slist_append(drvc->instances, sdi);
 123
 124         return devices;
 125
 126 err_out:
 127         g_free(devc);
 128         sr_dev_inst_free(sdi);
 129
 130         return NULL;
 131 }
 132
 133 static GSList *dev_list(const struct sr_dev_driver *di)
 134 {
 135         return ((struct drv_context *)(di->priv))->instances;
 136 }
 137
 138 static int dev_clear(const struct sr_dev_driver *di)
 139 {
 140         return std_dev_clear(di, NULL);
 141 }
 142
 143 static int dev_open(struct sr_dev_inst *sdi)
 144 {
 145         (void)sdi;
 146
 147         /* Nothing to do here. */
 148         sdi->status = SR_ST_ACTIVE;
 149
 150         return SR_OK;
 151 }
 152
 153 static int dev_close(struct sr_dev_inst *sdi)
 154 {
 155         (void)sdi;
 156
 157         /* Nothing to do here. */
 158         sdi->status = SR_ST_INACTIVE;
 159
 160         return SR_OK;
 161 }
 162
 163 static int cleanup(const struct sr_dev_driver *di)
 164 {
 165         dev_clear(di);
 166
 167         return SR_OK;
 168 }
 169
 170 static int config_get(uint32_t key, GVariant **data,
 171                       const struct sr_dev_inst *sdi,
 172                       const struct sr_channel_group *cg)
 173 {
 174         struct dev_context *devc;
 175         int ret;
 176         uint64_t shunt;
 177         gboolean power_off;
 178
 179         devc = sdi->priv;
 180
 181         ret = SR_OK;
 182         switch (key) {
 183         case SR_CONF_LIMIT_SAMPLES:
 184                 *data = g_variant_new_uint64(devc->limit_samples);
 185                 break;
 186         case SR_CONF_LIMIT_MSEC:
 187                 *data = g_variant_new_uint64(devc->limit_msec);
 188                 break;
 189         case SR_CONF_SAMPLERATE:
 190                 *data = g_variant_new_uint64(devc->samplerate);
 191                 break;
 192         case SR_CONF_PROBE_FACTOR:
 193                 if (!cg)
 194                         return SR_ERR_CHANNEL_GROUP;
 195                 ret = bl_acme_get_shunt(cg, &shunt);
 196                 if (ret == SR_OK)
 197                         *data = g_variant_new_uint64(shunt);
 198                 break;
 199         case SR_CONF_POWER_OFF:
 200                 if (!cg)
 201                         return SR_ERR_CHANNEL_GROUP;
 202                 ret = bl_acme_read_power_state(cg, &power_off);
 203                 if (ret == SR_OK)
 204                         *data = g_variant_new_boolean(power_off);
 205                 break;
 206         default:
 207                 return SR_ERR_NA;
 208         }
 209
 210         return ret;
 211 }
 212
 213 static int config_set(uint32_t key, GVariant *data,
 214                       const struct sr_dev_inst *sdi,
 215                       const struct sr_channel_group *cg)
 216 {
 217         struct dev_context *devc;
 218         uint64_t samplerate;
 219         int ret;
 220
 221         if (sdi->status != SR_ST_ACTIVE)
 222                 return SR_ERR_DEV_CLOSED;
 223
 224         devc = sdi->priv;
 225
 226         ret = SR_OK;
 227         switch (key) {
 228         case SR_CONF_LIMIT_SAMPLES:
 229                 devc->limit_samples = g_variant_get_uint64(data);
 230                 devc->limit_msec = 0;
 231                 break;
 232         case SR_CONF_LIMIT_MSEC:
 233                 devc->limit_msec = g_variant_get_uint64(data) * 1000;
 234                 devc->limit_samples = 0;
 235                 break;
 236         case SR_CONF_SAMPLERATE:
 237                 samplerate = g_variant_get_uint64(data);
 238                 if (samplerate > MAX_SAMPLE_RATE) {
 239                         sr_err("Maximum sample rate is %d", MAX_SAMPLE_RATE);
 240                         ret = SR_ERR_SAMPLERATE;
 241                         break;
 242                 }
 243                 devc->samplerate = samplerate;
 244                 break;
 245         case SR_CONF_PROBE_FACTOR:
 246                 if (!cg)
 247                         return SR_ERR_CHANNEL_GROUP;
 248                 ret = bl_acme_set_shunt(cg, g_variant_get_uint64(data));
 249                 break;
 250         case SR_CONF_POWER_OFF:
 251                 if (!cg)
 252                         return SR_ERR_CHANNEL_GROUP;
 253                 ret = bl_acme_set_power_off(cg, g_variant_get_boolean(data));
 254                 break;
 255         default:
 256                 ret = SR_ERR_NA;
 257         }
 258
 259         return ret;
 260 }
 261
 262 static int config_list(uint32_t key, GVariant **data,
 263                        const struct sr_dev_inst *sdi,
 264                        const struct sr_channel_group *cg)
 265 {
 266         GVariant *gvar;
 267         GVariantBuilder gvb;
 268         int ret;
 269
 270         (void)sdi;
 271         (void)cg;
 272
 273         ret = SR_OK;
 274         if (!cg) {
 275                 switch (key) {
 276                 case SR_CONF_DEVICE_OPTIONS:
 277                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 278                                 devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
 279                         break;
 280                 case SR_CONF_SAMPLERATE:
 281                         g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
 282                         gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"),
 283                                 samplerates, ARRAY_SIZE(samplerates), sizeof(uint64_t));
 284                         g_variant_builder_add(&gvb, "{sv}",
 285                                               "samplerate-steps", gvar);
 286                         *data = g_variant_builder_end(&gvb);
 287                         break;
 288                 default:
 289                         return SR_ERR_NA;
 290                 }
 291         } else {
 292                 switch (key) {
 293                 case SR_CONF_DEVICE_OPTIONS:
 294                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 295                                 devopts_cg, ARRAY_SIZE(devopts_cg), sizeof(uint32_t));
 296                         break;
 297                 default:
 298                         return SR_ERR_NA;
 299                 }
 300         }
 301
 302         return ret;
 303 }
 304
 305 static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data)
 306 {
 307         struct dev_context *devc;
 308
 309         (void)cb_data;
 310
 311         if (sdi->status != SR_ST_ACTIVE)
 312                 return SR_ERR_DEV_CLOSED;
 313
 314         devc = sdi->priv;
 315         devc->samples_read = 0;
 316
 317         if (pipe(devc->pipe_fds)) {
 318                 sr_err("Error setting up pipe");
 319                 return SR_ERR;
 320         }
 321
 322         devc->channel = g_io_channel_unix_new(devc->pipe_fds[0]);
 323         g_io_channel_set_flags(devc->channel, G_IO_FLAG_NONBLOCK, NULL);
 324         g_io_channel_set_encoding(devc->channel, NULL, NULL);
 325         g_io_channel_set_buffered(devc->channel, FALSE);
 326
 327         sr_session_source_add_channel(sdi->session, devc->channel,
 328                 G_IO_IN | G_IO_ERR, 1, bl_acme_receive_data, (void *)sdi);
 329
 330         /* Send header packet to the session bus. */
 331         std_session_send_df_header(sdi, LOG_PREFIX);
 332         devc->start_time = g_get_monotonic_time();
 333
 334         return SR_OK;
 335 }
 336
 337 static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
 338 {
 339         struct sr_datafeed_packet packet;
 340         struct dev_context *devc;
 341
 342         (void)cb_data;
 343
 344         devc = sdi->priv;
 345
 346         if (sdi->status != SR_ST_ACTIVE)
 347                 return SR_ERR_DEV_CLOSED;
 348
 349         sr_session_source_remove_channel(sdi->session, devc->channel);
 350         g_io_channel_shutdown(devc->channel, FALSE, NULL);
 351         g_io_channel_unref(devc->channel);
 352         devc->channel = NULL;
 353
 354         /* Send last packet. */
 355         packet.type = SR_DF_END;
 356         sr_session_send(sdi, &packet);
 357
 358         return SR_OK;
 359 }
 360
 361 SR_PRIV struct sr_dev_driver baylibre_acme_driver_info = {
 362         .name = "baylibre-acme",
 363         .longname = "BayLibre ACME (Another Cute Measurement Equipment)",
 364         .api_version = 1,
 365         .init = init,
 366         .cleanup = cleanup,
 367         .scan = scan,
 368         .dev_list = dev_list,
 369         .dev_clear = dev_clear,
 370         .config_get = config_get,
 371         .config_set = config_set,
 372         .config_list = config_list,
 373         .dev_open = dev_open,
 374         .dev_close = dev_close,
 375         .dev_acquisition_start = dev_acquisition_start,
 376         .dev_acquisition_stop = dev_acquisition_stop,
 377         .priv = NULL,
 378 };