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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 <config.h> | |
21 | #include "protocol.h" | |
22 | #include <time.h> | |
23 | #include <sys/timerfd.h> | |
24 | ||
25 | SR_PRIV struct sr_dev_driver baylibre_acme_driver_info; | |
26 | ||
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, | |
32 | }; | |
33 | ||
34 | /* | |
35 | * Currently there are two channel-group/probe options for ACME: | |
36 | * - SR_CONF_PROBE_FACTOR - allows to modify current shunt resistance | |
37 | * calibration | |
38 | * - SR_CONF_POWER_OFF - allows to remotely cut-off/restore power to | |
39 | * measured devices | |
40 | * | |
41 | * They are not static - we have to check each probe's capabilities in | |
42 | * config_list(). | |
43 | */ | |
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) | |
47 | ||
48 | #define MAX_SAMPLE_RATE 500 /* In Hz */ | |
49 | ||
50 | static const uint64_t samplerates[] = { | |
51 | SR_HZ(1), | |
52 | SR_HZ(MAX_SAMPLE_RATE), | |
53 | SR_HZ(1), | |
54 | }; | |
55 | ||
56 | static int init(struct sr_dev_driver *di, struct sr_context *sr_ctx) | |
57 | { | |
58 | return std_init(sr_ctx, di, LOG_PREFIX); | |
59 | } | |
60 | ||
61 | static GSList *scan(struct sr_dev_driver *di, GSList *options) | |
62 | { | |
63 | struct drv_context *drvc; | |
64 | struct dev_context *devc; | |
65 | struct sr_dev_inst *sdi; | |
66 | GSList *devices; | |
67 | gboolean status; | |
68 | int i; | |
69 | ||
70 | (void)options; | |
71 | ||
72 | drvc = di->context; | |
73 | devices = NULL; | |
74 | ||
75 | devc = g_malloc0(sizeof(struct dev_context)); | |
76 | devc->samplerate = SR_HZ(10); | |
77 | ||
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"); | |
82 | sdi->driver = di; | |
83 | sdi->priv = devc; | |
84 | ||
85 | status = bl_acme_is_sane(); | |
86 | if (!status) | |
87 | goto err_out; | |
88 | ||
89 | /* | |
90 | * Iterate over all ACME connectors and check if any probes | |
91 | * are present. | |
92 | */ | |
93 | for (i = 0; i < MAX_PROBES; i++) { | |
94 | /* | |
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. | |
98 | */ | |
99 | status = bl_acme_detect_probe(bl_acme_get_enrg_addr(i), | |
100 | PROBE_NUM(i), ENRG_PROBE_NAME); | |
101 | if (status) { | |
102 | /* Energy probe detected. */ | |
103 | status = bl_acme_register_probe(sdi, PROBE_ENRG, | |
104 | bl_acme_get_enrg_addr(i), PROBE_NUM(i)); | |
105 | if (!status) { | |
106 | sr_err("Error registering power probe %d", | |
107 | PROBE_NUM(i)); | |
108 | continue; | |
109 | } | |
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); | |
113 | if (status) { | |
114 | /* Temperature probe detected. */ | |
115 | status = bl_acme_register_probe(sdi,PROBE_TEMP, | |
116 | bl_acme_get_temp_addr(i), PROBE_NUM(i)); | |
117 | if (!status) { | |
118 | sr_err("Error registering temp " | |
119 | "probe %d", PROBE_NUM(i)); | |
120 | continue; | |
121 | } | |
122 | } | |
123 | } | |
124 | } | |
125 | ||
126 | /* | |
127 | * Let's assume there's no ACME device present if no probe | |
128 | * has been registered. | |
129 | */ | |
130 | if (!sdi->channel_groups) | |
131 | goto err_out; | |
132 | ||
133 | devices = g_slist_append(devices, sdi); | |
134 | drvc->instances = g_slist_append(drvc->instances, sdi); | |
135 | ||
136 | return devices; | |
137 | ||
138 | err_out: | |
139 | g_free(devc); | |
140 | sr_dev_inst_free(sdi); | |
141 | ||
142 | return NULL; | |
143 | } | |
144 | ||
145 | static GSList *dev_list(const struct sr_dev_driver *di) | |
146 | { | |
147 | return ((struct drv_context *)(di->context))->instances; | |
148 | } | |
149 | ||
150 | static int dev_clear(const struct sr_dev_driver *di) | |
151 | { | |
152 | return std_dev_clear(di, NULL); | |
153 | } | |
154 | ||
155 | static int dev_open(struct sr_dev_inst *sdi) | |
156 | { | |
157 | (void)sdi; | |
158 | ||
159 | sdi->status = SR_ST_ACTIVE; | |
160 | ||
161 | return SR_OK; | |
162 | } | |
163 | ||
164 | static int dev_close(struct sr_dev_inst *sdi) | |
165 | { | |
166 | (void)sdi; | |
167 | ||
168 | sdi->status = SR_ST_INACTIVE; | |
169 | ||
170 | return SR_OK; | |
171 | } | |
172 | ||
173 | static int config_get(uint32_t key, GVariant **data, | |
174 | const struct sr_dev_inst *sdi, | |
175 | const struct sr_channel_group *cg) | |
176 | { | |
177 | struct dev_context *devc; | |
178 | int ret; | |
179 | uint64_t shunt; | |
180 | gboolean power_off; | |
181 | ||
182 | devc = sdi->priv; | |
183 | ||
184 | ret = SR_OK; | |
185 | switch (key) { | |
186 | case SR_CONF_LIMIT_SAMPLES: | |
187 | *data = g_variant_new_uint64(devc->limit_samples); | |
188 | break; | |
189 | case SR_CONF_LIMIT_MSEC: | |
190 | *data = g_variant_new_uint64(devc->limit_msec); | |
191 | break; | |
192 | case SR_CONF_SAMPLERATE: | |
193 | *data = g_variant_new_uint64(devc->samplerate); | |
194 | break; | |
195 | case SR_CONF_PROBE_FACTOR: | |
196 | if (!cg) | |
197 | return SR_ERR_CHANNEL_GROUP; | |
198 | ret = bl_acme_get_shunt(cg, &shunt); | |
199 | if (ret == SR_OK) | |
200 | *data = g_variant_new_uint64(shunt); | |
201 | break; | |
202 | case SR_CONF_POWER_OFF: | |
203 | if (!cg) | |
204 | return SR_ERR_CHANNEL_GROUP; | |
205 | ret = bl_acme_read_power_state(cg, &power_off); | |
206 | if (ret == SR_OK) | |
207 | *data = g_variant_new_boolean(power_off); | |
208 | break; | |
209 | default: | |
210 | return SR_ERR_NA; | |
211 | } | |
212 | ||
213 | return ret; | |
214 | } | |
215 | ||
216 | static int config_set(uint32_t key, GVariant *data, | |
217 | const struct sr_dev_inst *sdi, | |
218 | const struct sr_channel_group *cg) | |
219 | { | |
220 | struct dev_context *devc; | |
221 | uint64_t samplerate; | |
222 | int ret; | |
223 | ||
224 | if (sdi->status != SR_ST_ACTIVE) | |
225 | return SR_ERR_DEV_CLOSED; | |
226 | ||
227 | devc = sdi->priv; | |
228 | ||
229 | ret = SR_OK; | |
230 | switch (key) { | |
231 | case SR_CONF_LIMIT_SAMPLES: | |
232 | devc->limit_samples = g_variant_get_uint64(data); | |
233 | devc->limit_msec = 0; | |
234 | break; | |
235 | case SR_CONF_LIMIT_MSEC: | |
236 | devc->limit_msec = g_variant_get_uint64(data) * 1000; | |
237 | devc->limit_samples = 0; | |
238 | break; | |
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; | |
244 | break; | |
245 | } | |
246 | devc->samplerate = samplerate; | |
247 | bl_acme_maybe_set_update_interval(sdi, samplerate); | |
248 | break; | |
249 | case SR_CONF_PROBE_FACTOR: | |
250 | if (!cg) | |
251 | return SR_ERR_CHANNEL_GROUP; | |
252 | ret = bl_acme_set_shunt(cg, g_variant_get_uint64(data)); | |
253 | break; | |
254 | case SR_CONF_POWER_OFF: | |
255 | if (!cg) | |
256 | return SR_ERR_CHANNEL_GROUP; | |
257 | ret = bl_acme_set_power_off(cg, g_variant_get_boolean(data)); | |
258 | break; | |
259 | default: | |
260 | ret = SR_ERR_NA; | |
261 | } | |
262 | ||
263 | return ret; | |
264 | } | |
265 | ||
266 | static int config_list(uint32_t key, GVariant **data, | |
267 | const struct sr_dev_inst *sdi, | |
268 | const struct sr_channel_group *cg) | |
269 | { | |
270 | uint32_t devopts_cg[MAX_DEVOPTS_CG]; | |
271 | GVariant *gvar; | |
272 | GVariantBuilder gvb; | |
273 | int ret, num_devopts_cg = 0; | |
274 | ||
275 | (void)sdi; | |
276 | (void)cg; | |
277 | ||
278 | ret = SR_OK; | |
279 | if (!cg) { | |
280 | switch (key) { | |
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)); | |
284 | break; | |
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); | |
292 | break; | |
293 | default: | |
294 | return SR_ERR_NA; | |
295 | } | |
296 | } else { | |
297 | switch (key) { | |
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; | |
303 | ||
304 | *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32, | |
305 | devopts_cg, num_devopts_cg, sizeof(uint32_t)); | |
306 | break; | |
307 | default: | |
308 | return SR_ERR_NA; | |
309 | } | |
310 | } | |
311 | ||
312 | return ret; | |
313 | } | |
314 | ||
315 | static void dev_acquisition_close(const struct sr_dev_inst *sdi) | |
316 | { | |
317 | GSList *chl; | |
318 | struct sr_channel *ch; | |
319 | ||
320 | for (chl = sdi->channels; chl; chl = chl->next) { | |
321 | ch = chl->data; | |
322 | bl_acme_close_channel(ch); | |
323 | } | |
324 | } | |
325 | ||
326 | static int dev_acquisition_open(const struct sr_dev_inst *sdi) | |
327 | { | |
328 | GSList *chl; | |
329 | struct sr_channel *ch; | |
330 | ||
331 | for (chl = sdi->channels; chl; chl = chl->next) { | |
332 | ch = chl->data; | |
333 | if (bl_acme_open_channel(ch)) { | |
334 | sr_err("Error opening channel %s", ch->name); | |
335 | dev_acquisition_close(sdi); | |
336 | return SR_ERR; | |
337 | } | |
338 | } | |
339 | ||
340 | return 0; | |
341 | } | |
342 | ||
343 | static int dev_acquisition_start(const struct sr_dev_inst *sdi) | |
344 | { | |
345 | struct dev_context *devc; | |
346 | struct itimerspec tspec = { | |
347 | .it_interval = { 0, 0 }, | |
348 | .it_value = { 0, 0 } | |
349 | }; | |
350 | ||
351 | if (sdi->status != SR_ST_ACTIVE) | |
352 | return SR_ERR_DEV_CLOSED; | |
353 | ||
354 | if (dev_acquisition_open(sdi)) | |
355 | return SR_ERR; | |
356 | ||
357 | devc = sdi->priv; | |
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"); | |
363 | return SR_ERR; | |
364 | } | |
365 | ||
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; | |
369 | ||
370 | if (timerfd_settime(devc->timer_fd, 0, &tspec, NULL)) { | |
371 | sr_err("Failed to set timer"); | |
372 | close(devc->timer_fd); | |
373 | return SR_ERR; | |
374 | } | |
375 | ||
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); | |
380 | ||
381 | sr_session_source_add_channel(sdi->session, devc->channel, | |
382 | G_IO_IN | G_IO_ERR, 1000, bl_acme_receive_data, (void *)sdi); | |
383 | ||
384 | std_session_send_df_header(sdi, LOG_PREFIX); | |
385 | devc->start_time = g_get_monotonic_time(); | |
386 | ||
387 | return SR_OK; | |
388 | } | |
389 | ||
390 | static int dev_acquisition_stop(struct sr_dev_inst *sdi) | |
391 | { | |
392 | struct dev_context *devc; | |
393 | ||
394 | devc = sdi->priv; | |
395 | ||
396 | if (sdi->status != SR_ST_ACTIVE) | |
397 | return SR_ERR_DEV_CLOSED; | |
398 | ||
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; | |
404 | ||
405 | std_session_send_df_end(sdi, LOG_PREFIX); | |
406 | ||
407 | if (devc->samples_missed > 0) | |
408 | sr_warn("%" PRIu64 " samples missed", devc->samples_missed); | |
409 | ||
410 | return SR_OK; | |
411 | } | |
412 | ||
413 | SR_PRIV struct sr_dev_driver baylibre_acme_driver_info = { | |
414 | .name = "baylibre-acme", | |
415 | .longname = "BayLibre ACME (Another Cute Measurement Equipment)", | |
416 | .api_version = 1, | |
417 | .init = init, | |
418 | .cleanup = std_cleanup, | |
419 | .scan = scan, | |
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, | |
429 | .context = NULL, | |
430 | }; |