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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 | static const uint32_t devopts[] = { | |
26 | SR_CONF_CONTINUOUS, | |
27 | SR_CONF_LIMIT_SAMPLES | SR_CONF_GET | SR_CONF_SET, | |
28 | SR_CONF_LIMIT_MSEC | SR_CONF_GET | SR_CONF_SET, | |
29 | SR_CONF_SAMPLERATE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST, | |
30 | }; | |
31 | ||
32 | /* | |
33 | * Currently there are two channel-group/probe options for ACME: | |
34 | * - SR_CONF_PROBE_FACTOR - allows to modify current shunt resistance | |
35 | * calibration | |
36 | * - SR_CONF_POWER_OFF - allows to remotely cut-off/restore power to | |
37 | * measured devices | |
38 | * | |
39 | * They are not static - we have to check each probe's capabilities in | |
40 | * config_list(). | |
41 | */ | |
42 | #define MAX_DEVOPTS_CG 2 | |
43 | #define HAS_PROBE_FACTOR (SR_CONF_PROBE_FACTOR | SR_CONF_GET | SR_CONF_SET) | |
44 | #define HAS_POWER_OFF (SR_CONF_POWER_OFF | SR_CONF_GET | SR_CONF_SET) | |
45 | ||
46 | #define MAX_SAMPLE_RATE 500 /* In Hz */ | |
47 | ||
48 | static const uint64_t samplerates[] = { | |
49 | SR_HZ(1), | |
50 | SR_HZ(MAX_SAMPLE_RATE), | |
51 | SR_HZ(1), | |
52 | }; | |
53 | ||
54 | static GSList *scan(struct sr_dev_driver *di, GSList *options) | |
55 | { | |
56 | struct dev_context *devc; | |
57 | struct sr_dev_inst *sdi; | |
58 | gboolean status; | |
59 | int i; | |
60 | ||
61 | (void)options; | |
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->priv = devc; | |
71 | ||
72 | status = bl_acme_is_sane(); | |
73 | if (!status) | |
74 | goto err_out; | |
75 | ||
76 | /* | |
77 | * Iterate over all ACME connectors and check if any probes | |
78 | * are present. | |
79 | */ | |
80 | for (i = 0; i < MAX_PROBES; i++) { | |
81 | /* | |
82 | * First check if there's an energy probe on this connector. If | |
83 | * not, and we're already at the fifth probe - see if we can | |
84 | * detect a temperature probe. | |
85 | */ | |
86 | status = bl_acme_detect_probe(bl_acme_get_enrg_addr(i), | |
87 | PROBE_NUM(i), ENRG_PROBE_NAME); | |
88 | if (status) { | |
89 | /* Energy probe detected. */ | |
90 | status = bl_acme_register_probe(sdi, PROBE_ENRG, | |
91 | bl_acme_get_enrg_addr(i), PROBE_NUM(i)); | |
92 | if (!status) { | |
93 | sr_err("Error registering power probe %d", | |
94 | PROBE_NUM(i)); | |
95 | continue; | |
96 | } | |
97 | } else if (i >= TEMP_PRB_START_INDEX) { | |
98 | status = bl_acme_detect_probe(bl_acme_get_temp_addr(i), | |
99 | PROBE_NUM(i), TEMP_PROBE_NAME); | |
100 | if (status) { | |
101 | /* Temperature probe detected. */ | |
102 | status = bl_acme_register_probe(sdi,PROBE_TEMP, | |
103 | bl_acme_get_temp_addr(i), PROBE_NUM(i)); | |
104 | if (!status) { | |
105 | sr_err("Error registering temp " | |
106 | "probe %d", PROBE_NUM(i)); | |
107 | continue; | |
108 | } | |
109 | } | |
110 | } | |
111 | } | |
112 | ||
113 | /* | |
114 | * Let's assume there's no ACME device present if no probe | |
115 | * has been registered. | |
116 | */ | |
117 | if (!sdi->channel_groups) | |
118 | goto err_out; | |
119 | ||
120 | return std_scan_complete(di, g_slist_append(NULL, sdi)); | |
121 | ||
122 | err_out: | |
123 | g_free(devc); | |
124 | sr_dev_inst_free(sdi); | |
125 | ||
126 | return NULL; | |
127 | } | |
128 | ||
129 | static int dev_open(struct sr_dev_inst *sdi) | |
130 | { | |
131 | (void)sdi; | |
132 | ||
133 | sdi->status = SR_ST_ACTIVE; | |
134 | ||
135 | return SR_OK; | |
136 | } | |
137 | ||
138 | static int dev_close(struct sr_dev_inst *sdi) | |
139 | { | |
140 | (void)sdi; | |
141 | ||
142 | sdi->status = SR_ST_INACTIVE; | |
143 | ||
144 | return SR_OK; | |
145 | } | |
146 | ||
147 | static int config_get(uint32_t key, GVariant **data, | |
148 | const struct sr_dev_inst *sdi, | |
149 | const struct sr_channel_group *cg) | |
150 | { | |
151 | struct dev_context *devc; | |
152 | int ret; | |
153 | uint64_t shunt; | |
154 | gboolean power_off; | |
155 | ||
156 | devc = sdi->priv; | |
157 | ||
158 | ret = SR_OK; | |
159 | switch (key) { | |
160 | case SR_CONF_LIMIT_SAMPLES: | |
161 | case SR_CONF_LIMIT_MSEC: | |
162 | ret = sr_sw_limits_config_get(&devc->limits, key, data); | |
163 | break; | |
164 | case SR_CONF_SAMPLERATE: | |
165 | *data = g_variant_new_uint64(devc->samplerate); | |
166 | break; | |
167 | case SR_CONF_PROBE_FACTOR: | |
168 | if (!cg) | |
169 | return SR_ERR_CHANNEL_GROUP; | |
170 | ret = bl_acme_get_shunt(cg, &shunt); | |
171 | if (ret == SR_OK) | |
172 | *data = g_variant_new_uint64(shunt); | |
173 | break; | |
174 | case SR_CONF_POWER_OFF: | |
175 | if (!cg) | |
176 | return SR_ERR_CHANNEL_GROUP; | |
177 | ret = bl_acme_read_power_state(cg, &power_off); | |
178 | if (ret == SR_OK) | |
179 | *data = g_variant_new_boolean(power_off); | |
180 | break; | |
181 | default: | |
182 | return SR_ERR_NA; | |
183 | } | |
184 | ||
185 | return ret; | |
186 | } | |
187 | ||
188 | static int config_set(uint32_t key, GVariant *data, | |
189 | const struct sr_dev_inst *sdi, | |
190 | const struct sr_channel_group *cg) | |
191 | { | |
192 | struct dev_context *devc; | |
193 | uint64_t samplerate; | |
194 | int ret; | |
195 | ||
196 | if (sdi->status != SR_ST_ACTIVE) | |
197 | return SR_ERR_DEV_CLOSED; | |
198 | ||
199 | devc = sdi->priv; | |
200 | ||
201 | ret = SR_OK; | |
202 | switch (key) { | |
203 | case SR_CONF_LIMIT_SAMPLES: | |
204 | case SR_CONF_LIMIT_MSEC: | |
205 | ret = sr_sw_limits_config_set(&devc->limits, key, data); | |
206 | break; | |
207 | case SR_CONF_SAMPLERATE: | |
208 | samplerate = g_variant_get_uint64(data); | |
209 | if (samplerate > MAX_SAMPLE_RATE) { | |
210 | sr_err("Maximum sample rate is %d", MAX_SAMPLE_RATE); | |
211 | ret = SR_ERR_SAMPLERATE; | |
212 | break; | |
213 | } | |
214 | devc->samplerate = samplerate; | |
215 | bl_acme_maybe_set_update_interval(sdi, samplerate); | |
216 | break; | |
217 | case SR_CONF_PROBE_FACTOR: | |
218 | if (!cg) | |
219 | return SR_ERR_CHANNEL_GROUP; | |
220 | ret = bl_acme_set_shunt(cg, g_variant_get_uint64(data)); | |
221 | break; | |
222 | case SR_CONF_POWER_OFF: | |
223 | if (!cg) | |
224 | return SR_ERR_CHANNEL_GROUP; | |
225 | ret = bl_acme_set_power_off(cg, g_variant_get_boolean(data)); | |
226 | break; | |
227 | default: | |
228 | ret = SR_ERR_NA; | |
229 | } | |
230 | ||
231 | return ret; | |
232 | } | |
233 | ||
234 | static int config_list(uint32_t key, GVariant **data, | |
235 | const struct sr_dev_inst *sdi, | |
236 | const struct sr_channel_group *cg) | |
237 | { | |
238 | uint32_t devopts_cg[MAX_DEVOPTS_CG]; | |
239 | GVariant *gvar; | |
240 | GVariantBuilder gvb; | |
241 | int ret, num_devopts_cg = 0; | |
242 | ||
243 | (void)sdi; | |
244 | (void)cg; | |
245 | ||
246 | ret = SR_OK; | |
247 | if (!cg) { | |
248 | switch (key) { | |
249 | case SR_CONF_DEVICE_OPTIONS: | |
250 | *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32, | |
251 | devopts, ARRAY_SIZE(devopts), sizeof(uint32_t)); | |
252 | break; | |
253 | case SR_CONF_SAMPLERATE: | |
254 | g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}")); | |
255 | gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"), | |
256 | samplerates, ARRAY_SIZE(samplerates), sizeof(uint64_t)); | |
257 | g_variant_builder_add(&gvb, "{sv}", | |
258 | "samplerate-steps", gvar); | |
259 | *data = g_variant_builder_end(&gvb); | |
260 | break; | |
261 | default: | |
262 | return SR_ERR_NA; | |
263 | } | |
264 | } else { | |
265 | switch (key) { | |
266 | case SR_CONF_DEVICE_OPTIONS: | |
267 | if (bl_acme_get_probe_type(cg) == PROBE_ENRG) | |
268 | devopts_cg[num_devopts_cg++] = HAS_PROBE_FACTOR; | |
269 | if (bl_acme_probe_has_pws(cg)) | |
270 | devopts_cg[num_devopts_cg++] = HAS_POWER_OFF; | |
271 | ||
272 | *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32, | |
273 | devopts_cg, num_devopts_cg, sizeof(uint32_t)); | |
274 | break; | |
275 | default: | |
276 | return SR_ERR_NA; | |
277 | } | |
278 | } | |
279 | ||
280 | return ret; | |
281 | } | |
282 | ||
283 | static void dev_acquisition_close(const struct sr_dev_inst *sdi) | |
284 | { | |
285 | GSList *chl; | |
286 | struct sr_channel *ch; | |
287 | ||
288 | for (chl = sdi->channels; chl; chl = chl->next) { | |
289 | ch = chl->data; | |
290 | bl_acme_close_channel(ch); | |
291 | } | |
292 | } | |
293 | ||
294 | static int dev_acquisition_open(const struct sr_dev_inst *sdi) | |
295 | { | |
296 | GSList *chl; | |
297 | struct sr_channel *ch; | |
298 | ||
299 | for (chl = sdi->channels; chl; chl = chl->next) { | |
300 | ch = chl->data; | |
301 | if (bl_acme_open_channel(ch)) { | |
302 | sr_err("Error opening channel %s", ch->name); | |
303 | dev_acquisition_close(sdi); | |
304 | return SR_ERR; | |
305 | } | |
306 | } | |
307 | ||
308 | return 0; | |
309 | } | |
310 | ||
311 | static int dev_acquisition_start(const struct sr_dev_inst *sdi) | |
312 | { | |
313 | struct dev_context *devc; | |
314 | struct itimerspec tspec = { | |
315 | .it_interval = { 0, 0 }, | |
316 | .it_value = { 0, 0 } | |
317 | }; | |
318 | ||
319 | if (sdi->status != SR_ST_ACTIVE) | |
320 | return SR_ERR_DEV_CLOSED; | |
321 | ||
322 | if (dev_acquisition_open(sdi)) | |
323 | return SR_ERR; | |
324 | ||
325 | devc = sdi->priv; | |
326 | devc->samples_missed = 0; | |
327 | devc->timer_fd = timerfd_create(CLOCK_MONOTONIC, 0); | |
328 | if (devc->timer_fd < 0) { | |
329 | sr_err("Error creating timer fd"); | |
330 | return SR_ERR; | |
331 | } | |
332 | ||
333 | tspec.it_interval.tv_sec = 0; | |
334 | tspec.it_interval.tv_nsec = SR_HZ_TO_NS(devc->samplerate); | |
335 | tspec.it_value = tspec.it_interval; | |
336 | ||
337 | if (timerfd_settime(devc->timer_fd, 0, &tspec, NULL)) { | |
338 | sr_err("Failed to set timer"); | |
339 | close(devc->timer_fd); | |
340 | return SR_ERR; | |
341 | } | |
342 | ||
343 | devc->channel = g_io_channel_unix_new(devc->timer_fd); | |
344 | g_io_channel_set_flags(devc->channel, G_IO_FLAG_NONBLOCK, NULL); | |
345 | g_io_channel_set_encoding(devc->channel, NULL, NULL); | |
346 | g_io_channel_set_buffered(devc->channel, FALSE); | |
347 | ||
348 | sr_session_source_add_channel(sdi->session, devc->channel, | |
349 | G_IO_IN | G_IO_ERR, 1000, bl_acme_receive_data, (void *)sdi); | |
350 | ||
351 | std_session_send_df_header(sdi); | |
352 | sr_sw_limits_acquisition_start(&devc->limits); | |
353 | ||
354 | return SR_OK; | |
355 | } | |
356 | ||
357 | static int dev_acquisition_stop(struct sr_dev_inst *sdi) | |
358 | { | |
359 | struct dev_context *devc; | |
360 | ||
361 | devc = sdi->priv; | |
362 | ||
363 | if (sdi->status != SR_ST_ACTIVE) | |
364 | return SR_ERR_DEV_CLOSED; | |
365 | ||
366 | dev_acquisition_close(sdi); | |
367 | sr_session_source_remove_channel(sdi->session, devc->channel); | |
368 | g_io_channel_shutdown(devc->channel, FALSE, NULL); | |
369 | g_io_channel_unref(devc->channel); | |
370 | devc->channel = NULL; | |
371 | ||
372 | std_session_send_df_end(sdi); | |
373 | ||
374 | if (devc->samples_missed > 0) | |
375 | sr_warn("%" PRIu64 " samples missed", devc->samples_missed); | |
376 | ||
377 | return SR_OK; | |
378 | } | |
379 | ||
380 | static struct sr_dev_driver baylibre_acme_driver_info = { | |
381 | .name = "baylibre-acme", | |
382 | .longname = "BayLibre ACME (Another Cute Measurement Equipment)", | |
383 | .api_version = 1, | |
384 | .init = std_init, | |
385 | .cleanup = std_cleanup, | |
386 | .scan = scan, | |
387 | .dev_list = std_dev_list, | |
388 | .config_get = config_get, | |
389 | .config_set = config_set, | |
390 | .config_list = config_list, | |
391 | .dev_open = dev_open, | |
392 | .dev_close = dev_close, | |
393 | .dev_acquisition_start = dev_acquisition_start, | |
394 | .dev_acquisition_stop = dev_acquisition_stop, | |
395 | .context = NULL, | |
396 | }; | |
397 | SR_REGISTER_DEV_DRIVER(baylibre_acme_driver_info); |