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Commit | Line | Data |
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dfaee1de BG |
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 | ||
6ec6c43b | 20 | #include <config.h> |
6b80b80d | 21 | #include <string.h> |
391e23a9 | 22 | #include <stdlib.h> |
6b80b80d | 23 | #include <errno.h> |
391e23a9 | 24 | #include <fcntl.h> |
4678bdb6 | 25 | #include <arpa/inet.h> |
61f2b7f7 | 26 | #include <glib/gstdio.h> |
dfaee1de | 27 | #include "protocol.h" |
740ad48a | 28 | #include "gpio.h" |
dfaee1de | 29 | |
4678bdb6 BG |
30 | #define ACME_REV_A 1 |
31 | #define ACME_REV_B 2 | |
32 | ||
133016f6 BG |
33 | enum channel_type { |
34 | ENRG_PWR = 1, | |
35 | ENRG_CURR, | |
36 | ENRG_VOL, | |
37 | TEMP_IN, | |
38 | TEMP_OUT, | |
39 | }; | |
40 | ||
6b80b80d | 41 | struct channel_group_priv { |
4678bdb6 | 42 | uint8_t rev; |
6b80b80d | 43 | int hwmon_num; |
61f2b7f7 | 44 | int probe_type; |
740ad48a | 45 | int index; |
8f196120 | 46 | int has_pws; |
4678bdb6 | 47 | uint32_t pws_gpio; |
6b80b80d BG |
48 | }; |
49 | ||
50 | struct channel_priv { | |
51 | int ch_type; | |
4e88b86c | 52 | int fd; |
7e5a048f | 53 | float val; |
6b80b80d BG |
54 | struct channel_group_priv *probe; |
55 | }; | |
56 | ||
4678bdb6 BG |
57 | #define EEPROM_SERIAL_SIZE 16 |
58 | #define EEPROM_TAG_SIZE 32 | |
59 | ||
60 | #define EEPROM_PROBE_TYPE_USB 1 | |
61 | #define EEPROM_PROBE_TYPE_JACK 2 | |
62 | #define EEPROM_PROBE_TYPE_HE10 3 | |
63 | ||
64 | struct probe_eeprom { | |
453a0c2e BG |
65 | uint32_t type; |
66 | uint32_t rev; | |
67 | uint32_t shunt; | |
4678bdb6 BG |
68 | uint8_t pwr_sw; |
69 | uint8_t serial[EEPROM_SERIAL_SIZE]; | |
453a0c2e | 70 | int8_t tag[EEPROM_TAG_SIZE]; |
4c3a4bca BG |
71 | }; |
72 | ||
73 | #define EEPROM_SIZE (3 * sizeof(uint32_t) + 1 + EEPROM_SERIAL_SIZE + EEPROM_TAG_SIZE) | |
74 | ||
75 | #define EEPROM_OFF_TYPE 0 | |
76 | #define EEPROM_OFF_REV sizeof(uint32_t) | |
77 | #define EEPROM_OFF_SHUNT (2 * sizeof(uint32_t)) | |
78 | #define EEPROM_OFF_PWR_SW (3 * sizeof(uint32_t)) | |
79 | #define EEPROM_OFF_SERIAL (3 * sizeof(uint32_t) + 1) | |
80 | #define EEPROM_OFF_TAG (EEPROM_OFF_SERIAL + EEPROM_SERIAL_SIZE) | |
4678bdb6 | 81 | |
6b80b80d BG |
82 | static const uint8_t enrg_i2c_addrs[] = { |
83 | 0x40, 0x41, 0x44, 0x45, 0x42, 0x43, 0x46, 0x47, | |
84 | }; | |
85 | ||
86 | static const uint8_t temp_i2c_addrs[] = { | |
87 | 0x0, 0x0, 0x0, 0x0, 0x4c, 0x49, 0x4f, 0x4b, | |
88 | }; | |
89 | ||
4678bdb6 | 90 | static const uint32_t revA_pws_gpios[] = { |
391e23a9 | 91 | 486, 498, 502, 482, 478, 506, 510, 474, |
740ad48a BG |
92 | }; |
93 | ||
4678bdb6 | 94 | static const uint32_t revA_pws_info_gpios[] = { |
740ad48a BG |
95 | 487, 499, 503, 483, 479, 507, 511, 475, |
96 | }; | |
97 | ||
4678bdb6 BG |
98 | static const uint32_t revB_pws_gpios[] = { |
99 | 489, 491, 493, 495, 497, 499, 501, 503, | |
100 | }; | |
101 | ||
61f2b7f7 BG |
102 | #define MOHM_TO_UOHM(x) ((x) * 1000) |
103 | #define UOHM_TO_MOHM(x) ((x) / 1000) | |
104 | ||
6b80b80d BG |
105 | SR_PRIV uint8_t bl_acme_get_enrg_addr(int index) |
106 | { | |
107 | return enrg_i2c_addrs[index]; | |
108 | } | |
109 | ||
110 | SR_PRIV uint8_t bl_acme_get_temp_addr(int index) | |
111 | { | |
112 | return temp_i2c_addrs[index]; | |
113 | } | |
114 | ||
115 | SR_PRIV gboolean bl_acme_is_sane(void) | |
116 | { | |
117 | gboolean status; | |
118 | ||
119 | /* | |
120 | * We expect sysfs to be present and mounted at /sys, ina226 and | |
121 | * tmp435 sensors detected by the system and their appropriate | |
122 | * drivers loaded and functional. | |
123 | */ | |
124 | status = g_file_test("/sys", G_FILE_TEST_IS_DIR); | |
125 | if (!status) { | |
126 | sr_err("/sys/ directory not found - sysfs not mounted?"); | |
127 | return FALSE; | |
128 | } | |
129 | ||
130 | return TRUE; | |
131 | } | |
132 | ||
133 | static void probe_name_path(unsigned int addr, GString *path) | |
134 | { | |
135 | g_string_printf(path, | |
136 | "/sys/class/i2c-adapter/i2c-1/1-00%02x/name", addr); | |
137 | } | |
138 | ||
139 | /* | |
140 | * For given address fill buf with the path to appropriate hwmon entry. | |
141 | */ | |
142 | static void probe_hwmon_path(unsigned int addr, GString *path) | |
143 | { | |
144 | g_string_printf(path, | |
145 | "/sys/class/i2c-adapter/i2c-1/1-00%02x/hwmon", addr); | |
146 | } | |
147 | ||
4678bdb6 BG |
148 | static void probe_eeprom_path(unsigned int addr, GString *path) |
149 | { | |
150 | g_string_printf(path, | |
151 | "/sys/class/i2c-dev/i2c-1/device/1-00%02x/eeprom", | |
152 | addr + 0x10); | |
153 | } | |
154 | ||
6b80b80d BG |
155 | SR_PRIV gboolean bl_acme_detect_probe(unsigned int addr, |
156 | int prb_num, const char *prb_name) | |
157 | { | |
158 | gboolean ret = FALSE, status; | |
159 | char *buf = NULL; | |
160 | GString *path = g_string_sized_new(64); | |
161 | GError *err = NULL; | |
162 | gsize size; | |
163 | ||
164 | probe_name_path(addr, path); | |
165 | status = g_file_get_contents(path->str, &buf, &size, &err); | |
166 | if (!status) { | |
167 | sr_dbg("Name for probe %d can't be read: %s", | |
168 | prb_num, err->message); | |
169 | g_string_free(path, TRUE); | |
170 | return ret; | |
6b80b80d BG |
171 | } |
172 | ||
391e23a9 | 173 | if (!strncmp(buf, prb_name, strlen(prb_name))) { |
6b80b80d BG |
174 | /* |
175 | * Correct driver registered on this address - but is | |
176 | * there an actual probe connected? | |
177 | */ | |
178 | probe_hwmon_path(addr, path); | |
179 | status = g_file_test(path->str, G_FILE_TEST_IS_DIR); | |
180 | if (status) { | |
181 | /* We have found an ACME probe. */ | |
182 | ret = TRUE; | |
183 | } | |
184 | } | |
185 | ||
186 | g_free(buf); | |
187 | g_string_free(path, TRUE); | |
188 | ||
189 | return ret; | |
190 | } | |
191 | ||
192 | static int get_hwmon_index(unsigned int addr) | |
193 | { | |
194 | int status, hwmon; | |
195 | GString *path = g_string_sized_new(64); | |
196 | GError *err = NULL; | |
197 | GDir *dir; | |
198 | ||
199 | probe_hwmon_path(addr, path); | |
200 | dir = g_dir_open(path->str, 0, &err); | |
391e23a9 | 201 | if (!dir) { |
6b80b80d BG |
202 | sr_err("Error opening %s: %s", path->str, err->message); |
203 | g_string_free(path, TRUE); | |
204 | return -1; | |
205 | } | |
206 | ||
207 | g_string_free(path, TRUE); | |
208 | ||
209 | /* | |
210 | * The directory should contain a single file named hwmonX where X | |
211 | * is the hwmon index. | |
212 | */ | |
213 | status = sscanf(g_dir_read_name(dir), "hwmon%d", &hwmon); | |
214 | g_dir_close(dir); | |
215 | if (status != 1) { | |
216 | sr_err("Unable to determine the hwmon entry"); | |
217 | return -1; | |
218 | } | |
219 | ||
220 | return hwmon; | |
221 | } | |
222 | ||
391e23a9 | 223 | static void append_channel(struct sr_dev_inst *sdi, struct sr_channel_group *cg, |
6b80b80d BG |
224 | int index, int type) |
225 | { | |
226 | struct channel_priv *cp; | |
227 | struct dev_context *devc; | |
228 | struct sr_channel *ch; | |
229 | char *name; | |
230 | ||
231 | devc = sdi->priv; | |
232 | ||
233 | switch (type) { | |
234 | case ENRG_PWR: | |
235 | name = g_strdup_printf("P%d_ENRG_PWR", index); | |
236 | break; | |
237 | case ENRG_CURR: | |
238 | name = g_strdup_printf("P%d_ENRG_CURR", index); | |
239 | break; | |
240 | case ENRG_VOL: | |
241 | name = g_strdup_printf("P%d_ENRG_VOL", index); | |
242 | break; | |
243 | case TEMP_IN: | |
244 | name = g_strdup_printf("P%d_TEMP_IN", index); | |
245 | break; | |
246 | case TEMP_OUT: | |
247 | name = g_strdup_printf("P%d_TEMP_OUT", index); | |
248 | break; | |
249 | default: | |
391e23a9 | 250 | sr_err("Invalid channel type: %d.", type); |
6b80b80d BG |
251 | return; |
252 | } | |
253 | ||
254 | cp = g_malloc0(sizeof(struct channel_priv)); | |
255 | cp->ch_type = type; | |
256 | cp->probe = cg->priv; | |
257 | ||
5e23fcab | 258 | ch = sr_channel_new(sdi, devc->num_channels++, |
6b80b80d BG |
259 | SR_CHANNEL_ANALOG, TRUE, name); |
260 | g_free(name); | |
261 | ||
262 | ch->priv = cp; | |
263 | cg->channels = g_slist_append(cg->channels, ch); | |
6b80b80d BG |
264 | } |
265 | ||
4678bdb6 BG |
266 | static int read_probe_eeprom(unsigned int addr, struct probe_eeprom *eeprom) |
267 | { | |
4678bdb6 | 268 | GString *path = g_string_sized_new(64); |
4c3a4bca | 269 | char eeprom_buf[EEPROM_SIZE]; |
4678bdb6 BG |
270 | ssize_t rd; |
271 | int fd; | |
272 | ||
273 | probe_eeprom_path(addr, path); | |
274 | fd = g_open(path->str, O_RDONLY); | |
275 | g_string_free(path, TRUE); | |
276 | if (fd < 0) | |
277 | return -1; | |
278 | ||
4c3a4bca | 279 | rd = read(fd, eeprom_buf, EEPROM_SIZE); |
4678bdb6 | 280 | g_close(fd, NULL); |
4c3a4bca | 281 | if (rd != EEPROM_SIZE) |
4678bdb6 BG |
282 | return -1; |
283 | ||
a7da85f5 BG |
284 | eeprom->type = RB32(eeprom_buf + EEPROM_OFF_TYPE); |
285 | eeprom->rev = RB32(eeprom_buf + EEPROM_OFF_REV); | |
286 | eeprom->shunt = RB32(eeprom_buf + EEPROM_OFF_SHUNT); | |
4c3a4bca BG |
287 | eeprom->pwr_sw = R8(eeprom_buf + EEPROM_OFF_PWR_SW); |
288 | /* Don't care about the serial number and tag for now. */ | |
4678bdb6 BG |
289 | |
290 | /* Check if we have some sensible values. */ | |
291 | if (eeprom->rev != 'B') | |
292 | /* 'B' is the only supported revision with EEPROM for now. */ | |
293 | return -1; | |
294 | ||
295 | if (eeprom->type != EEPROM_PROBE_TYPE_USB && | |
296 | eeprom->type != EEPROM_PROBE_TYPE_JACK && | |
297 | eeprom->type != EEPROM_PROBE_TYPE_HE10) | |
298 | return -1; | |
299 | ||
300 | return 0; | |
301 | } | |
302 | ||
303 | /* Some i2c slave addresses on revision B probes differ from revision A. */ | |
304 | static int revB_addr_to_num(unsigned int addr) | |
305 | { | |
306 | switch (addr) { | |
307 | case 0x44: return 5; | |
308 | case 0x45: return 6; | |
309 | case 0x42: return 3; | |
310 | case 0x43: return 4; | |
311 | default: return addr - 0x3f; | |
312 | } | |
313 | } | |
314 | ||
6b80b80d BG |
315 | SR_PRIV gboolean bl_acme_register_probe(struct sr_dev_inst *sdi, int type, |
316 | unsigned int addr, int prb_num) | |
317 | { | |
318 | struct sr_channel_group *cg; | |
319 | struct channel_group_priv *cgp; | |
4678bdb6 BG |
320 | struct probe_eeprom eeprom; |
321 | int hwmon, status; | |
322 | uint32_t gpio; | |
6b80b80d BG |
323 | |
324 | /* Obtain the hwmon index. */ | |
325 | hwmon = get_hwmon_index(addr); | |
326 | if (hwmon < 0) | |
327 | return FALSE; | |
328 | ||
329 | cg = g_malloc0(sizeof(struct sr_channel_group)); | |
330 | cgp = g_malloc0(sizeof(struct channel_group_priv)); | |
4678bdb6 BG |
331 | cg->priv = cgp; |
332 | ||
333 | /* | |
334 | * See if we can read the EEPROM contents. If not, assume it's | |
335 | * a revision A probe. | |
336 | */ | |
4c3a4bca | 337 | memset(&eeprom, 0, sizeof(struct probe_eeprom)); |
4678bdb6 BG |
338 | status = read_probe_eeprom(addr, &eeprom); |
339 | cgp->rev = status < 0 ? ACME_REV_A : ACME_REV_B; | |
340 | ||
341 | prb_num = cgp->rev == ACME_REV_A ? prb_num : revB_addr_to_num(addr); | |
342 | ||
6b80b80d | 343 | cgp->hwmon_num = hwmon; |
61f2b7f7 | 344 | cgp->probe_type = type; |
740ad48a | 345 | cgp->index = prb_num - 1; |
6b80b80d | 346 | cg->name = g_strdup_printf("Probe_%d", prb_num); |
4678bdb6 BG |
347 | |
348 | if (cgp->rev == ACME_REV_A) { | |
349 | gpio = revA_pws_info_gpios[cgp->index]; | |
350 | cgp->has_pws = sr_gpio_getval_export(gpio); | |
351 | cgp->pws_gpio = revA_pws_gpios[cgp->index]; | |
352 | } else { | |
353 | cgp->has_pws = eeprom.pwr_sw; | |
354 | cgp->pws_gpio = revB_pws_gpios[cgp->index]; | |
355 | ||
356 | /* | |
357 | * For revision B we can already try to set the shunt | |
358 | * resistance according to the EEPROM contents. | |
359 | * | |
360 | * Keep the default value if shunt in EEPROM == 0. | |
361 | */ | |
362 | if (eeprom.shunt > 0) | |
363 | bl_acme_set_shunt(cg, UOHM_TO_MOHM(eeprom.shunt)); | |
364 | } | |
6b80b80d BG |
365 | |
366 | if (type == PROBE_ENRG) { | |
367 | append_channel(sdi, cg, prb_num, ENRG_PWR); | |
368 | append_channel(sdi, cg, prb_num, ENRG_CURR); | |
369 | append_channel(sdi, cg, prb_num, ENRG_VOL); | |
370 | } else if (type == PROBE_TEMP) { | |
371 | append_channel(sdi, cg, prb_num, TEMP_IN); | |
372 | append_channel(sdi, cg, prb_num, TEMP_OUT); | |
373 | } else { | |
391e23a9 | 374 | sr_err("Invalid probe type: %d.", type); |
6b80b80d BG |
375 | } |
376 | ||
377 | sdi->channel_groups = g_slist_append(sdi->channel_groups, cg); | |
378 | ||
379 | return TRUE; | |
380 | } | |
381 | ||
1fe04eb8 BG |
382 | SR_PRIV int bl_acme_get_probe_type(const struct sr_channel_group *cg) |
383 | { | |
384 | struct channel_group_priv *cgp = cg->priv; | |
385 | ||
386 | return cgp->probe_type; | |
387 | } | |
388 | ||
389 | SR_PRIV int bl_acme_probe_has_pws(const struct sr_channel_group *cg) | |
390 | { | |
391 | struct channel_group_priv *cgp = cg->priv; | |
392 | ||
8f196120 | 393 | return cgp->has_pws; |
1fe04eb8 BG |
394 | } |
395 | ||
61f2b7f7 BG |
396 | /* |
397 | * Sets path to the hwmon attribute if this channel group | |
398 | * supports shunt resistance setting. The caller has to supply | |
399 | * a valid GString. | |
400 | */ | |
401 | static int get_shunt_path(const struct sr_channel_group *cg, GString *path) | |
402 | { | |
403 | struct channel_group_priv *cgp; | |
404 | int ret = SR_OK, status; | |
405 | ||
406 | cgp = cg->priv; | |
407 | ||
408 | if (cgp->probe_type != PROBE_ENRG) { | |
409 | sr_err("Probe doesn't support shunt resistance setting"); | |
410 | return SR_ERR_ARG; | |
411 | } | |
412 | ||
413 | g_string_append_printf(path, | |
414 | "/sys/class/hwmon/hwmon%d/shunt_resistor", | |
415 | cgp->hwmon_num); | |
416 | ||
417 | /* | |
418 | * The shunt_resistor sysfs attribute is available | |
419 | * in the Linux kernel since version 3.20. We have | |
391e23a9 | 420 | * to notify the user if this attribute is not present. |
61f2b7f7 BG |
421 | */ |
422 | status = g_file_test(path->str, G_FILE_TEST_EXISTS); | |
423 | if (!status) { | |
391e23a9 | 424 | sr_err("shunt_resistance attribute not present, please update " |
61f2b7f7 BG |
425 | "your kernel to version >=3.20"); |
426 | return SR_ERR_NA; | |
427 | } | |
428 | ||
429 | return ret; | |
430 | } | |
431 | ||
7c91c22a BG |
432 | /* |
433 | * Try setting the update_interval sysfs attribute for each probe according | |
434 | * to samplerate. | |
435 | */ | |
436 | SR_PRIV void bl_acme_maybe_set_update_interval(const struct sr_dev_inst *sdi, | |
437 | uint64_t samplerate) | |
438 | { | |
439 | struct sr_channel_group *cg; | |
440 | struct channel_group_priv *cgp; | |
441 | GString *hwmon; | |
442 | GSList *l; | |
443 | FILE *fd; | |
444 | ||
445 | for (l = sdi->channel_groups; l != NULL; l = l->next) { | |
446 | cg = l->data; | |
447 | cgp = cg->priv; | |
448 | ||
449 | hwmon = g_string_sized_new(64); | |
450 | g_string_append_printf(hwmon, | |
451 | "/sys/class/hwmon/hwmon%d/update_interval", | |
452 | cgp->hwmon_num); | |
453 | ||
454 | if (g_file_test(hwmon->str, G_FILE_TEST_EXISTS)) { | |
455 | fd = g_fopen(hwmon->str, "w"); | |
456 | if (!fd) { | |
457 | g_string_free(hwmon, TRUE); | |
458 | continue; | |
459 | } | |
460 | ||
461 | g_fprintf(fd, "%" PRIu64 "\n", 1000 / samplerate); | |
462 | fclose(fd); | |
463 | } | |
464 | ||
465 | g_string_free(hwmon, TRUE); | |
466 | } | |
467 | } | |
468 | ||
61f2b7f7 BG |
469 | SR_PRIV int bl_acme_get_shunt(const struct sr_channel_group *cg, |
470 | uint64_t *shunt) | |
471 | { | |
472 | GString *path = g_string_sized_new(64); | |
473 | gchar *contents; | |
474 | int status, ret = SR_OK; | |
475 | GError *err = NULL; | |
476 | ||
477 | status = get_shunt_path(cg, path); | |
478 | if (status != SR_OK) { | |
479 | ret = status; | |
480 | goto out; | |
481 | } | |
482 | ||
483 | status = g_file_get_contents(path->str, &contents, NULL, &err); | |
484 | if (!status) { | |
485 | sr_err("Error reading shunt resistance: %s", err->message); | |
486 | ret = SR_ERR_IO; | |
487 | goto out; | |
488 | } | |
489 | ||
490 | *shunt = UOHM_TO_MOHM(strtol(contents, NULL, 10)); | |
491 | ||
492 | out: | |
493 | g_string_free(path, TRUE); | |
494 | return ret; | |
495 | } | |
496 | ||
391e23a9 | 497 | SR_PRIV int bl_acme_set_shunt(const struct sr_channel_group *cg, uint64_t shunt) |
61f2b7f7 BG |
498 | { |
499 | GString *path = g_string_sized_new(64);; | |
500 | int status, ret = SR_OK; | |
501 | FILE *fd; | |
502 | ||
503 | status = get_shunt_path(cg, path); | |
504 | if (status != SR_OK) { | |
505 | ret = status; | |
506 | goto out; | |
507 | } | |
508 | ||
509 | /* | |
510 | * Can't use g_file_set_contents() here, as it calls open() with | |
511 | * O_EXEC flag in a sysfs directory thus failing with EACCES. | |
512 | */ | |
513 | fd = g_fopen(path->str, "w"); | |
514 | if (!fd) { | |
7237e912 | 515 | sr_err("Error opening %s: %s", path->str, g_strerror(errno)); |
350b8b07 BG |
516 | ret = SR_ERR_IO; |
517 | goto out; | |
61f2b7f7 BG |
518 | } |
519 | ||
34527854 | 520 | g_fprintf(fd, "%" PRIu64 "\n", MOHM_TO_UOHM(shunt)); |
61f2b7f7 BG |
521 | fclose(fd); |
522 | ||
523 | out: | |
524 | g_string_free(path, TRUE); | |
525 | return ret; | |
526 | } | |
527 | ||
740ad48a BG |
528 | SR_PRIV int bl_acme_read_power_state(const struct sr_channel_group *cg, |
529 | gboolean *off) | |
530 | { | |
531 | struct channel_group_priv *cgp; | |
532 | int val; | |
533 | ||
534 | cgp = cg->priv; | |
535 | ||
1fe04eb8 | 536 | if (!bl_acme_probe_has_pws(cg)) { |
740ad48a BG |
537 | sr_err("Probe has no power-switch"); |
538 | return SR_ERR_ARG; | |
539 | } | |
540 | ||
4678bdb6 | 541 | val = sr_gpio_getval_export(cgp->pws_gpio); |
740ad48a BG |
542 | *off = val ? FALSE : TRUE; |
543 | ||
544 | return SR_OK; | |
545 | } | |
546 | ||
547 | SR_PRIV int bl_acme_set_power_off(const struct sr_channel_group *cg, | |
548 | gboolean off) | |
549 | { | |
550 | struct channel_group_priv *cgp; | |
09d217a4 | 551 | int val; |
740ad48a BG |
552 | |
553 | cgp = cg->priv; | |
554 | ||
1fe04eb8 | 555 | if (!bl_acme_probe_has_pws(cg)) { |
740ad48a BG |
556 | sr_err("Probe has no power-switch"); |
557 | return SR_ERR_ARG; | |
558 | } | |
559 | ||
4678bdb6 | 560 | val = sr_gpio_setval_export(cgp->pws_gpio, off ? 0 : 1); |
192d37e7 BG |
561 | if (val < 0) { |
562 | sr_err("Error setting power-off state: gpio: %d", | |
4678bdb6 | 563 | cgp->pws_gpio); |
192d37e7 BG |
564 | return SR_ERR_IO; |
565 | } | |
740ad48a BG |
566 | |
567 | return SR_OK; | |
568 | } | |
569 | ||
6b80b80d | 570 | static int channel_to_mq(struct sr_channel *ch) |
dfaee1de | 571 | { |
6b80b80d BG |
572 | struct channel_priv *chp; |
573 | ||
574 | chp = ch->priv; | |
575 | ||
576 | switch (chp->ch_type) { | |
577 | case ENRG_PWR: | |
578 | return SR_MQ_POWER; | |
579 | case ENRG_CURR: | |
580 | return SR_MQ_CURRENT; | |
581 | case ENRG_VOL: | |
582 | return SR_MQ_VOLTAGE; | |
391e23a9 | 583 | case TEMP_IN: /* Fallthrough */ |
6b80b80d BG |
584 | case TEMP_OUT: |
585 | return SR_MQ_TEMPERATURE; | |
586 | default: | |
587 | return -1; | |
588 | } | |
589 | } | |
590 | ||
591 | static int channel_to_unit(struct sr_channel *ch) | |
592 | { | |
593 | struct channel_priv *chp; | |
594 | ||
595 | chp = ch->priv; | |
596 | ||
597 | switch (chp->ch_type) { | |
598 | case ENRG_PWR: | |
599 | return SR_UNIT_WATT; | |
600 | case ENRG_CURR: | |
601 | return SR_UNIT_AMPERE; | |
602 | case ENRG_VOL: | |
603 | return SR_UNIT_VOLT; | |
391e23a9 | 604 | case TEMP_IN: /* Fallthrough */ |
6b80b80d BG |
605 | case TEMP_OUT: |
606 | return SR_UNIT_CELSIUS; | |
607 | default: | |
608 | return -1; | |
609 | } | |
610 | } | |
611 | ||
612 | /* We need to scale measurements down from the units used by the drivers. */ | |
613 | static float adjust_data(int val, int type) | |
614 | { | |
615 | switch (type) { | |
616 | case ENRG_PWR: | |
617 | return ((float)val) / 1000000.0; | |
391e23a9 UH |
618 | case ENRG_CURR: /* Fallthrough */ |
619 | case ENRG_VOL: /* Fallthrough */ | |
620 | case TEMP_IN: /* Fallthrough */ | |
6b80b80d BG |
621 | case TEMP_OUT: |
622 | return ((float)val) / 1000.0; | |
623 | default: | |
624 | return 0.0; | |
625 | } | |
626 | } | |
627 | ||
628 | static float read_sample(struct sr_channel *ch) | |
629 | { | |
630 | struct channel_priv *chp; | |
4e88b86c | 631 | char buf[16]; |
6b80b80d BG |
632 | ssize_t len; |
633 | int fd; | |
634 | ||
4e88b86c DL |
635 | chp = ch->priv; |
636 | fd = chp->fd; | |
637 | ||
638 | lseek(fd, 0, SEEK_SET); | |
639 | ||
640 | len = read(fd, buf, sizeof(buf)); | |
641 | if (len < 0) { | |
6433156c | 642 | sr_err("Error reading from channel %s (hwmon: %d): %s", |
7237e912 | 643 | ch->name, chp->probe->hwmon_num, g_strerror(errno)); |
4e88b86c DL |
644 | ch->enabled = FALSE; |
645 | return -1.0; | |
646 | } | |
647 | ||
648 | return adjust_data(strtol(buf, NULL, 10), chp->ch_type); | |
649 | } | |
650 | ||
651 | SR_PRIV int bl_acme_open_channel(struct sr_channel *ch) | |
652 | { | |
653 | struct channel_priv *chp; | |
654 | char path[64], *file; | |
655 | int fd; | |
656 | ||
6b80b80d BG |
657 | chp = ch->priv; |
658 | ||
659 | switch (chp->ch_type) { | |
660 | case ENRG_PWR: file = "power1_input"; break; | |
661 | case ENRG_CURR: file = "curr1_input"; break; | |
662 | case ENRG_VOL: file = "in1_input"; break; | |
663 | case TEMP_IN: file = "temp1_input"; break; | |
664 | case TEMP_OUT: file = "temp2_input"; break; | |
665 | default: | |
391e23a9 | 666 | sr_err("Invalid channel type: %d.", chp->ch_type); |
4e88b86c | 667 | return SR_ERR; |
6b80b80d BG |
668 | } |
669 | ||
391e23a9 | 670 | snprintf(path, sizeof(path), "/sys/class/hwmon/hwmon%d/%s", |
6b80b80d | 671 | chp->probe->hwmon_num, file); |
4e88b86c | 672 | |
6b80b80d BG |
673 | fd = open(path, O_RDONLY); |
674 | if (fd < 0) { | |
7237e912 | 675 | sr_err("Error opening %s: %s", path, g_strerror(errno)); |
6b80b80d | 676 | ch->enabled = FALSE; |
4e88b86c | 677 | return SR_ERR; |
6b80b80d BG |
678 | } |
679 | ||
4e88b86c | 680 | chp->fd = fd; |
6b80b80d | 681 | |
4e88b86c DL |
682 | return 0; |
683 | } | |
684 | ||
685 | SR_PRIV void bl_acme_close_channel(struct sr_channel *ch) | |
686 | { | |
687 | struct channel_priv *chp; | |
688 | ||
689 | chp = ch->priv; | |
690 | close(chp->fd); | |
691 | chp->fd = -1; | |
6b80b80d BG |
692 | } |
693 | ||
694 | SR_PRIV int bl_acme_receive_data(int fd, int revents, void *cb_data) | |
695 | { | |
a0648b1a DL |
696 | uint32_t cur_time, elapsed_time; |
697 | uint64_t nrexpiration; | |
6b80b80d | 698 | struct sr_datafeed_packet packet, framep; |
5faebab2 | 699 | struct sr_datafeed_analog_old analog; |
6b80b80d BG |
700 | struct sr_dev_inst *sdi; |
701 | struct sr_channel *ch; | |
7e5a048f | 702 | struct channel_priv *chp; |
dfaee1de | 703 | struct dev_context *devc; |
6b80b80d | 704 | GSList *chl, chonly; |
7e5a048f | 705 | unsigned i; |
dfaee1de BG |
706 | |
707 | (void)fd; | |
6b80b80d BG |
708 | (void)revents; |
709 | ||
710 | sdi = cb_data; | |
711 | if (!sdi) | |
712 | return TRUE; | |
dfaee1de | 713 | |
6b80b80d BG |
714 | devc = sdi->priv; |
715 | if (!devc) | |
dfaee1de BG |
716 | return TRUE; |
717 | ||
5faebab2 | 718 | packet.type = SR_DF_ANALOG_OLD; |
6b80b80d | 719 | packet.payload = &analog; |
5faebab2 | 720 | memset(&analog, 0, sizeof(struct sr_datafeed_analog_old)); |
6b80b80d | 721 | |
a0648b1a DL |
722 | if (read(devc->timer_fd, &nrexpiration, sizeof(nrexpiration)) < 0) { |
723 | sr_warn("Failed to read timer information"); | |
724 | return TRUE; | |
725 | } | |
726 | ||
6b80b80d | 727 | /* |
a0648b1a DL |
728 | * We were not able to process the previous timer expiration, we are |
729 | * overloaded. | |
6b80b80d | 730 | */ |
a0648b1a DL |
731 | if (nrexpiration > 1) |
732 | devc->samples_missed += nrexpiration - 1; | |
6b80b80d | 733 | |
6b80b80d | 734 | /* |
7e5a048f BG |
735 | * XXX This is a nasty workaround... |
736 | * | |
737 | * At high sampling rates and maximum channels we are not able to | |
738 | * acquire samples fast enough, even though frontends still think | |
739 | * that samples arrive on time. This causes shifts in frontend | |
740 | * plots. | |
741 | * | |
742 | * To compensate for the delay we check if any clock events were | |
743 | * missed and - if so - don't really read the next value, but send | |
744 | * the same sample as fast as possible. We do it until we are back | |
745 | * on schedule. | |
746 | * | |
747 | * At high sampling rate this doesn't seem to visibly reduce the | |
748 | * accuracy. | |
6b80b80d | 749 | */ |
7e5a048f BG |
750 | for (i = 0; i < nrexpiration; i++) { |
751 | framep.type = SR_DF_FRAME_BEGIN; | |
752 | sr_session_send(cb_data, &framep); | |
753 | ||
754 | /* | |
755 | * Due to different units used in each channel we're sending | |
756 | * samples one-by-one. | |
757 | */ | |
758 | for (chl = sdi->channels; chl; chl = chl->next) { | |
759 | ch = chl->data; | |
760 | chp = ch->priv; | |
6b80b80d | 761 | |
7e5a048f BG |
762 | if (!ch->enabled) |
763 | continue; | |
764 | chonly.next = NULL; | |
765 | chonly.data = ch; | |
766 | analog.channels = &chonly; | |
767 | analog.num_samples = 1; | |
768 | analog.mq = channel_to_mq(chl->data); | |
769 | analog.unit = channel_to_unit(ch); | |
770 | ||
771 | if (i < 1) | |
772 | chp->val = read_sample(ch); | |
773 | ||
774 | analog.data = &chp->val; | |
775 | sr_session_send(cb_data, &packet); | |
776 | } | |
777 | ||
778 | framep.type = SR_DF_FRAME_END; | |
779 | sr_session_send(cb_data, &framep); | |
780 | } | |
6b80b80d BG |
781 | |
782 | devc->samples_read++; | |
783 | if (devc->limit_samples > 0 && | |
784 | devc->samples_read >= devc->limit_samples) { | |
785 | sr_info("Requested number of samples reached."); | |
786 | sdi->driver->dev_acquisition_stop(sdi, cb_data); | |
787 | devc->last_sample_fin = g_get_monotonic_time(); | |
dfaee1de | 788 | return TRUE; |
6b80b80d BG |
789 | } else if (devc->limit_msec > 0) { |
790 | cur_time = g_get_monotonic_time(); | |
791 | elapsed_time = cur_time - devc->start_time; | |
dfaee1de | 792 | |
6b80b80d BG |
793 | if (elapsed_time >= devc->limit_msec) { |
794 | sr_info("Sampling time limit reached."); | |
795 | sdi->driver->dev_acquisition_stop(sdi, cb_data); | |
796 | devc->last_sample_fin = g_get_monotonic_time(); | |
797 | return TRUE; | |
798 | } | |
dfaee1de BG |
799 | } |
800 | ||
6b80b80d | 801 | devc->last_sample_fin = g_get_monotonic_time(); |
dfaee1de BG |
802 | return TRUE; |
803 | } |