2 * This file is part of the libsigrok project.
4 * Copyright (C) 2015 Bartosz Golaszewski <bgolaszewski@baylibre.com>
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.
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.
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/>.
23 #include <sys/timerfd.h>
25 SR_PRIV struct sr_dev_driver baylibre_acme_driver_info;
27 static const uint32_t devopts[] = {
28 SR_CONF_CONTINUOUS | SR_CONF_SET,
29 SR_CONF_LIMIT_SAMPLES | SR_CONF_GET | SR_CONF_SET,
30 SR_CONF_LIMIT_MSEC | SR_CONF_GET | SR_CONF_SET,
31 SR_CONF_SAMPLERATE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
35 * Currently there are two channel-group/probe options for ACME:
36 * - SR_CONF_PROBE_FACTOR - allows to modify current shunt resistance
38 * - SR_CONF_POWER_OFF - allows to remotely cut-off/restore power to
41 * They are not static - we have to check each probe's capabilities in
44 #define MAX_DEVOPTS_CG 2
45 #define HAS_PROBE_FACTOR (SR_CONF_PROBE_FACTOR | SR_CONF_GET | SR_CONF_SET)
46 #define HAS_POWER_OFF (SR_CONF_POWER_OFF | SR_CONF_GET | SR_CONF_SET)
48 #define MAX_SAMPLE_RATE 500 /* In Hz */
50 static const uint64_t samplerates[] = {
52 SR_HZ(MAX_SAMPLE_RATE),
56 static int init(struct sr_dev_driver *di, struct sr_context *sr_ctx)
58 return std_init(sr_ctx, di, LOG_PREFIX);
61 static GSList *scan(struct sr_dev_driver *di, GSList *options)
63 struct drv_context *drvc;
64 struct dev_context *devc;
65 struct sr_dev_inst *sdi;
75 devc = g_malloc0(sizeof(struct dev_context));
76 devc->samplerate = SR_HZ(10);
78 sdi = g_malloc0(sizeof(struct sr_dev_inst));
79 sdi->status = SR_ST_INACTIVE;
80 sdi->vendor = g_strdup("BayLibre");
81 sdi->model = g_strdup("ACME");
85 status = bl_acme_is_sane();
90 * Iterate over all ACME connectors and check if any probes
93 for (i = 0; i < MAX_PROBES; i++) {
95 * First check if there's an energy probe on this connector. If
96 * not, and we're already at the fifth probe - see if we can
97 * detect a temperature probe.
99 status = bl_acme_detect_probe(bl_acme_get_enrg_addr(i),
100 PROBE_NUM(i), ENRG_PROBE_NAME);
102 /* Energy probe detected. */
103 status = bl_acme_register_probe(sdi, PROBE_ENRG,
104 bl_acme_get_enrg_addr(i), PROBE_NUM(i));
106 sr_err("Error registering power probe %d",
110 } else if (i >= TEMP_PRB_START_INDEX) {
111 status = bl_acme_detect_probe(bl_acme_get_temp_addr(i),
112 PROBE_NUM(i), TEMP_PROBE_NAME);
114 /* Temperature probe detected. */
115 status = bl_acme_register_probe(sdi,PROBE_TEMP,
116 bl_acme_get_temp_addr(i), PROBE_NUM(i));
118 sr_err("Error registering temp "
119 "probe %d", PROBE_NUM(i));
127 * Let's assume there's no ACME device present if no probe
128 * has been registered.
130 if (!sdi->channel_groups)
133 devices = g_slist_append(devices, sdi);
134 drvc->instances = g_slist_append(drvc->instances, sdi);
140 sr_dev_inst_free(sdi);
145 static GSList *dev_list(const struct sr_dev_driver *di)
147 return ((struct drv_context *)(di->context))->instances;
150 static int dev_clear(const struct sr_dev_driver *di)
152 return std_dev_clear(di, NULL);
155 static int dev_open(struct sr_dev_inst *sdi)
159 sdi->status = SR_ST_ACTIVE;
164 static int dev_close(struct sr_dev_inst *sdi)
168 sdi->status = SR_ST_INACTIVE;
173 static int config_get(uint32_t key, GVariant **data,
174 const struct sr_dev_inst *sdi,
175 const struct sr_channel_group *cg)
177 struct dev_context *devc;
186 case SR_CONF_LIMIT_SAMPLES:
187 *data = g_variant_new_uint64(devc->limit_samples);
189 case SR_CONF_LIMIT_MSEC:
190 *data = g_variant_new_uint64(devc->limit_msec);
192 case SR_CONF_SAMPLERATE:
193 *data = g_variant_new_uint64(devc->samplerate);
195 case SR_CONF_PROBE_FACTOR:
197 return SR_ERR_CHANNEL_GROUP;
198 ret = bl_acme_get_shunt(cg, &shunt);
200 *data = g_variant_new_uint64(shunt);
202 case SR_CONF_POWER_OFF:
204 return SR_ERR_CHANNEL_GROUP;
205 ret = bl_acme_read_power_state(cg, &power_off);
207 *data = g_variant_new_boolean(power_off);
216 static int config_set(uint32_t key, GVariant *data,
217 const struct sr_dev_inst *sdi,
218 const struct sr_channel_group *cg)
220 struct dev_context *devc;
224 if (sdi->status != SR_ST_ACTIVE)
225 return SR_ERR_DEV_CLOSED;
231 case SR_CONF_LIMIT_SAMPLES:
232 devc->limit_samples = g_variant_get_uint64(data);
233 devc->limit_msec = 0;
235 case SR_CONF_LIMIT_MSEC:
236 devc->limit_msec = g_variant_get_uint64(data) * 1000;
237 devc->limit_samples = 0;
239 case SR_CONF_SAMPLERATE:
240 samplerate = g_variant_get_uint64(data);
241 if (samplerate > MAX_SAMPLE_RATE) {
242 sr_err("Maximum sample rate is %d", MAX_SAMPLE_RATE);
243 ret = SR_ERR_SAMPLERATE;
246 devc->samplerate = samplerate;
247 bl_acme_maybe_set_update_interval(sdi, samplerate);
249 case SR_CONF_PROBE_FACTOR:
251 return SR_ERR_CHANNEL_GROUP;
252 ret = bl_acme_set_shunt(cg, g_variant_get_uint64(data));
254 case SR_CONF_POWER_OFF:
256 return SR_ERR_CHANNEL_GROUP;
257 ret = bl_acme_set_power_off(cg, g_variant_get_boolean(data));
266 static int config_list(uint32_t key, GVariant **data,
267 const struct sr_dev_inst *sdi,
268 const struct sr_channel_group *cg)
270 uint32_t devopts_cg[MAX_DEVOPTS_CG];
273 int ret, num_devopts_cg = 0;
281 case SR_CONF_DEVICE_OPTIONS:
282 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
283 devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
285 case SR_CONF_SAMPLERATE:
286 g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
287 gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"),
288 samplerates, ARRAY_SIZE(samplerates), sizeof(uint64_t));
289 g_variant_builder_add(&gvb, "{sv}",
290 "samplerate-steps", gvar);
291 *data = g_variant_builder_end(&gvb);
298 case SR_CONF_DEVICE_OPTIONS:
299 if (bl_acme_get_probe_type(cg) == PROBE_ENRG)
300 devopts_cg[num_devopts_cg++] = HAS_PROBE_FACTOR;
301 if (bl_acme_probe_has_pws(cg))
302 devopts_cg[num_devopts_cg++] = HAS_POWER_OFF;
304 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
305 devopts_cg, num_devopts_cg, sizeof(uint32_t));
315 static void dev_acquisition_close(const struct sr_dev_inst *sdi)
318 struct sr_channel *ch;
320 for (chl = sdi->channels; chl; chl = chl->next) {
322 bl_acme_close_channel(ch);
326 static int dev_acquisition_open(const struct sr_dev_inst *sdi)
329 struct sr_channel *ch;
331 for (chl = sdi->channels; chl; chl = chl->next) {
333 if (bl_acme_open_channel(ch)) {
334 sr_err("Error opening channel %s", ch->name);
335 dev_acquisition_close(sdi);
343 static int dev_acquisition_start(const struct sr_dev_inst *sdi)
345 struct dev_context *devc;
346 struct itimerspec tspec = {
347 .it_interval = { 0, 0 },
351 if (sdi->status != SR_ST_ACTIVE)
352 return SR_ERR_DEV_CLOSED;
354 if (dev_acquisition_open(sdi))
358 devc->samples_read = 0;
359 devc->samples_missed = 0;
360 devc->timer_fd = timerfd_create(CLOCK_MONOTONIC, 0);
361 if (devc->timer_fd < 0) {
362 sr_err("Error creating timer fd");
366 tspec.it_interval.tv_sec = 0;
367 tspec.it_interval.tv_nsec = SR_HZ_TO_NS(devc->samplerate);
368 tspec.it_value = tspec.it_interval;
370 if (timerfd_settime(devc->timer_fd, 0, &tspec, NULL)) {
371 sr_err("Failed to set timer");
372 close(devc->timer_fd);
376 devc->channel = g_io_channel_unix_new(devc->timer_fd);
377 g_io_channel_set_flags(devc->channel, G_IO_FLAG_NONBLOCK, NULL);
378 g_io_channel_set_encoding(devc->channel, NULL, NULL);
379 g_io_channel_set_buffered(devc->channel, FALSE);
381 sr_session_source_add_channel(sdi->session, devc->channel,
382 G_IO_IN | G_IO_ERR, 1000, bl_acme_receive_data, (void *)sdi);
384 std_session_send_df_header(sdi, LOG_PREFIX);
385 devc->start_time = g_get_monotonic_time();
390 static int dev_acquisition_stop(struct sr_dev_inst *sdi)
392 struct dev_context *devc;
396 if (sdi->status != SR_ST_ACTIVE)
397 return SR_ERR_DEV_CLOSED;
399 dev_acquisition_close(sdi);
400 sr_session_source_remove_channel(sdi->session, devc->channel);
401 g_io_channel_shutdown(devc->channel, FALSE, NULL);
402 g_io_channel_unref(devc->channel);
403 devc->channel = NULL;
405 std_session_send_df_end(sdi, LOG_PREFIX);
407 if (devc->samples_missed > 0)
408 sr_warn("%" PRIu64 " samples missed", devc->samples_missed);
413 SR_PRIV struct sr_dev_driver baylibre_acme_driver_info = {
414 .name = "baylibre-acme",
415 .longname = "BayLibre ACME (Another Cute Measurement Equipment)",
418 .cleanup = std_cleanup,
420 .dev_list = dev_list,
421 .dev_clear = dev_clear,
422 .config_get = config_get,
423 .config_set = config_set,
424 .config_list = config_list,
425 .dev_open = dev_open,
426 .dev_close = dev_close,
427 .dev_acquisition_start = dev_acquisition_start,
428 .dev_acquisition_stop = dev_acquisition_stop,