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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); | |
a64fec2b | 170 | g_error_free(err); |
6b80b80d | 171 | return ret; |
6b80b80d BG |
172 | } |
173 | ||
391e23a9 | 174 | if (!strncmp(buf, prb_name, strlen(prb_name))) { |
6b80b80d BG |
175 | /* |
176 | * Correct driver registered on this address - but is | |
177 | * there an actual probe connected? | |
178 | */ | |
179 | probe_hwmon_path(addr, path); | |
180 | status = g_file_test(path->str, G_FILE_TEST_IS_DIR); | |
181 | if (status) { | |
182 | /* We have found an ACME probe. */ | |
183 | ret = TRUE; | |
184 | } | |
185 | } | |
186 | ||
187 | g_free(buf); | |
188 | g_string_free(path, TRUE); | |
189 | ||
190 | return ret; | |
191 | } | |
192 | ||
193 | static int get_hwmon_index(unsigned int addr) | |
194 | { | |
195 | int status, hwmon; | |
196 | GString *path = g_string_sized_new(64); | |
197 | GError *err = NULL; | |
198 | GDir *dir; | |
199 | ||
200 | probe_hwmon_path(addr, path); | |
201 | dir = g_dir_open(path->str, 0, &err); | |
391e23a9 | 202 | if (!dir) { |
6b80b80d BG |
203 | sr_err("Error opening %s: %s", path->str, err->message); |
204 | g_string_free(path, TRUE); | |
a64fec2b | 205 | g_error_free(err); |
6b80b80d BG |
206 | return -1; |
207 | } | |
208 | ||
209 | g_string_free(path, TRUE); | |
210 | ||
211 | /* | |
212 | * The directory should contain a single file named hwmonX where X | |
213 | * is the hwmon index. | |
214 | */ | |
215 | status = sscanf(g_dir_read_name(dir), "hwmon%d", &hwmon); | |
216 | g_dir_close(dir); | |
217 | if (status != 1) { | |
218 | sr_err("Unable to determine the hwmon entry"); | |
219 | return -1; | |
220 | } | |
221 | ||
222 | return hwmon; | |
223 | } | |
224 | ||
391e23a9 | 225 | static void append_channel(struct sr_dev_inst *sdi, struct sr_channel_group *cg, |
6b80b80d BG |
226 | int index, int type) |
227 | { | |
228 | struct channel_priv *cp; | |
229 | struct dev_context *devc; | |
230 | struct sr_channel *ch; | |
231 | char *name; | |
232 | ||
233 | devc = sdi->priv; | |
234 | ||
235 | switch (type) { | |
236 | case ENRG_PWR: | |
237 | name = g_strdup_printf("P%d_ENRG_PWR", index); | |
238 | break; | |
239 | case ENRG_CURR: | |
240 | name = g_strdup_printf("P%d_ENRG_CURR", index); | |
241 | break; | |
242 | case ENRG_VOL: | |
243 | name = g_strdup_printf("P%d_ENRG_VOL", index); | |
244 | break; | |
245 | case TEMP_IN: | |
246 | name = g_strdup_printf("P%d_TEMP_IN", index); | |
247 | break; | |
248 | case TEMP_OUT: | |
249 | name = g_strdup_printf("P%d_TEMP_OUT", index); | |
250 | break; | |
251 | default: | |
391e23a9 | 252 | sr_err("Invalid channel type: %d.", type); |
6b80b80d BG |
253 | return; |
254 | } | |
255 | ||
256 | cp = g_malloc0(sizeof(struct channel_priv)); | |
257 | cp->ch_type = type; | |
258 | cp->probe = cg->priv; | |
259 | ||
5e23fcab | 260 | ch = sr_channel_new(sdi, devc->num_channels++, |
6b80b80d BG |
261 | SR_CHANNEL_ANALOG, TRUE, name); |
262 | g_free(name); | |
263 | ||
264 | ch->priv = cp; | |
265 | cg->channels = g_slist_append(cg->channels, ch); | |
6b80b80d BG |
266 | } |
267 | ||
4678bdb6 BG |
268 | static int read_probe_eeprom(unsigned int addr, struct probe_eeprom *eeprom) |
269 | { | |
4678bdb6 | 270 | GString *path = g_string_sized_new(64); |
4c3a4bca | 271 | char eeprom_buf[EEPROM_SIZE]; |
4678bdb6 BG |
272 | ssize_t rd; |
273 | int fd; | |
274 | ||
275 | probe_eeprom_path(addr, path); | |
276 | fd = g_open(path->str, O_RDONLY); | |
277 | g_string_free(path, TRUE); | |
278 | if (fd < 0) | |
279 | return -1; | |
280 | ||
4c3a4bca | 281 | rd = read(fd, eeprom_buf, EEPROM_SIZE); |
e4388768 | 282 | close(fd); |
4c3a4bca | 283 | if (rd != EEPROM_SIZE) |
4678bdb6 BG |
284 | return -1; |
285 | ||
a7da85f5 BG |
286 | eeprom->type = RB32(eeprom_buf + EEPROM_OFF_TYPE); |
287 | eeprom->rev = RB32(eeprom_buf + EEPROM_OFF_REV); | |
288 | eeprom->shunt = RB32(eeprom_buf + EEPROM_OFF_SHUNT); | |
4c3a4bca BG |
289 | eeprom->pwr_sw = R8(eeprom_buf + EEPROM_OFF_PWR_SW); |
290 | /* Don't care about the serial number and tag for now. */ | |
4678bdb6 BG |
291 | |
292 | /* Check if we have some sensible values. */ | |
293 | if (eeprom->rev != 'B') | |
294 | /* 'B' is the only supported revision with EEPROM for now. */ | |
295 | return -1; | |
296 | ||
297 | if (eeprom->type != EEPROM_PROBE_TYPE_USB && | |
298 | eeprom->type != EEPROM_PROBE_TYPE_JACK && | |
299 | eeprom->type != EEPROM_PROBE_TYPE_HE10) | |
300 | return -1; | |
301 | ||
302 | return 0; | |
303 | } | |
304 | ||
305 | /* Some i2c slave addresses on revision B probes differ from revision A. */ | |
306 | static int revB_addr_to_num(unsigned int addr) | |
307 | { | |
308 | switch (addr) { | |
309 | case 0x44: return 5; | |
310 | case 0x45: return 6; | |
311 | case 0x42: return 3; | |
312 | case 0x43: return 4; | |
313 | default: return addr - 0x3f; | |
314 | } | |
315 | } | |
316 | ||
6b80b80d BG |
317 | SR_PRIV gboolean bl_acme_register_probe(struct sr_dev_inst *sdi, int type, |
318 | unsigned int addr, int prb_num) | |
319 | { | |
320 | struct sr_channel_group *cg; | |
321 | struct channel_group_priv *cgp; | |
4678bdb6 BG |
322 | struct probe_eeprom eeprom; |
323 | int hwmon, status; | |
324 | uint32_t gpio; | |
6b80b80d BG |
325 | |
326 | /* Obtain the hwmon index. */ | |
327 | hwmon = get_hwmon_index(addr); | |
328 | if (hwmon < 0) | |
329 | return FALSE; | |
330 | ||
331 | cg = g_malloc0(sizeof(struct sr_channel_group)); | |
332 | cgp = g_malloc0(sizeof(struct channel_group_priv)); | |
4678bdb6 BG |
333 | cg->priv = cgp; |
334 | ||
335 | /* | |
336 | * See if we can read the EEPROM contents. If not, assume it's | |
337 | * a revision A probe. | |
338 | */ | |
4c3a4bca | 339 | memset(&eeprom, 0, sizeof(struct probe_eeprom)); |
4678bdb6 BG |
340 | status = read_probe_eeprom(addr, &eeprom); |
341 | cgp->rev = status < 0 ? ACME_REV_A : ACME_REV_B; | |
342 | ||
343 | prb_num = cgp->rev == ACME_REV_A ? prb_num : revB_addr_to_num(addr); | |
344 | ||
6b80b80d | 345 | cgp->hwmon_num = hwmon; |
61f2b7f7 | 346 | cgp->probe_type = type; |
740ad48a | 347 | cgp->index = prb_num - 1; |
6b80b80d | 348 | cg->name = g_strdup_printf("Probe_%d", prb_num); |
4678bdb6 BG |
349 | |
350 | if (cgp->rev == ACME_REV_A) { | |
351 | gpio = revA_pws_info_gpios[cgp->index]; | |
352 | cgp->has_pws = sr_gpio_getval_export(gpio); | |
353 | cgp->pws_gpio = revA_pws_gpios[cgp->index]; | |
354 | } else { | |
355 | cgp->has_pws = eeprom.pwr_sw; | |
356 | cgp->pws_gpio = revB_pws_gpios[cgp->index]; | |
357 | ||
358 | /* | |
359 | * For revision B we can already try to set the shunt | |
360 | * resistance according to the EEPROM contents. | |
361 | * | |
362 | * Keep the default value if shunt in EEPROM == 0. | |
363 | */ | |
364 | if (eeprom.shunt > 0) | |
365 | bl_acme_set_shunt(cg, UOHM_TO_MOHM(eeprom.shunt)); | |
366 | } | |
6b80b80d BG |
367 | |
368 | if (type == PROBE_ENRG) { | |
369 | append_channel(sdi, cg, prb_num, ENRG_PWR); | |
370 | append_channel(sdi, cg, prb_num, ENRG_CURR); | |
371 | append_channel(sdi, cg, prb_num, ENRG_VOL); | |
372 | } else if (type == PROBE_TEMP) { | |
373 | append_channel(sdi, cg, prb_num, TEMP_IN); | |
374 | append_channel(sdi, cg, prb_num, TEMP_OUT); | |
375 | } else { | |
391e23a9 | 376 | sr_err("Invalid probe type: %d.", type); |
6b80b80d BG |
377 | } |
378 | ||
379 | sdi->channel_groups = g_slist_append(sdi->channel_groups, cg); | |
380 | ||
381 | return TRUE; | |
382 | } | |
383 | ||
1fe04eb8 BG |
384 | SR_PRIV int bl_acme_get_probe_type(const struct sr_channel_group *cg) |
385 | { | |
386 | struct channel_group_priv *cgp = cg->priv; | |
387 | ||
388 | return cgp->probe_type; | |
389 | } | |
390 | ||
391 | SR_PRIV int bl_acme_probe_has_pws(const struct sr_channel_group *cg) | |
392 | { | |
393 | struct channel_group_priv *cgp = cg->priv; | |
394 | ||
8f196120 | 395 | return cgp->has_pws; |
1fe04eb8 BG |
396 | } |
397 | ||
61f2b7f7 BG |
398 | /* |
399 | * Sets path to the hwmon attribute if this channel group | |
400 | * supports shunt resistance setting. The caller has to supply | |
401 | * a valid GString. | |
402 | */ | |
403 | static int get_shunt_path(const struct sr_channel_group *cg, GString *path) | |
404 | { | |
405 | struct channel_group_priv *cgp; | |
406 | int ret = SR_OK, status; | |
407 | ||
408 | cgp = cg->priv; | |
409 | ||
410 | if (cgp->probe_type != PROBE_ENRG) { | |
411 | sr_err("Probe doesn't support shunt resistance setting"); | |
412 | return SR_ERR_ARG; | |
413 | } | |
414 | ||
415 | g_string_append_printf(path, | |
416 | "/sys/class/hwmon/hwmon%d/shunt_resistor", | |
417 | cgp->hwmon_num); | |
418 | ||
419 | /* | |
420 | * The shunt_resistor sysfs attribute is available | |
421 | * in the Linux kernel since version 3.20. We have | |
391e23a9 | 422 | * to notify the user if this attribute is not present. |
61f2b7f7 BG |
423 | */ |
424 | status = g_file_test(path->str, G_FILE_TEST_EXISTS); | |
425 | if (!status) { | |
391e23a9 | 426 | sr_err("shunt_resistance attribute not present, please update " |
61f2b7f7 BG |
427 | "your kernel to version >=3.20"); |
428 | return SR_ERR_NA; | |
429 | } | |
430 | ||
431 | return ret; | |
432 | } | |
433 | ||
7c91c22a BG |
434 | /* |
435 | * Try setting the update_interval sysfs attribute for each probe according | |
436 | * to samplerate. | |
437 | */ | |
438 | SR_PRIV void bl_acme_maybe_set_update_interval(const struct sr_dev_inst *sdi, | |
439 | uint64_t samplerate) | |
440 | { | |
441 | struct sr_channel_group *cg; | |
442 | struct channel_group_priv *cgp; | |
443 | GString *hwmon; | |
444 | GSList *l; | |
445 | FILE *fd; | |
446 | ||
447 | for (l = sdi->channel_groups; l != NULL; l = l->next) { | |
448 | cg = l->data; | |
449 | cgp = cg->priv; | |
450 | ||
451 | hwmon = g_string_sized_new(64); | |
452 | g_string_append_printf(hwmon, | |
453 | "/sys/class/hwmon/hwmon%d/update_interval", | |
454 | cgp->hwmon_num); | |
455 | ||
456 | if (g_file_test(hwmon->str, G_FILE_TEST_EXISTS)) { | |
457 | fd = g_fopen(hwmon->str, "w"); | |
458 | if (!fd) { | |
459 | g_string_free(hwmon, TRUE); | |
460 | continue; | |
461 | } | |
462 | ||
463 | g_fprintf(fd, "%" PRIu64 "\n", 1000 / samplerate); | |
464 | fclose(fd); | |
465 | } | |
466 | ||
467 | g_string_free(hwmon, TRUE); | |
468 | } | |
469 | } | |
470 | ||
61f2b7f7 BG |
471 | SR_PRIV int bl_acme_get_shunt(const struct sr_channel_group *cg, |
472 | uint64_t *shunt) | |
473 | { | |
474 | GString *path = g_string_sized_new(64); | |
475 | gchar *contents; | |
476 | int status, ret = SR_OK; | |
477 | GError *err = NULL; | |
478 | ||
479 | status = get_shunt_path(cg, path); | |
480 | if (status != SR_OK) { | |
481 | ret = status; | |
482 | goto out; | |
483 | } | |
484 | ||
485 | status = g_file_get_contents(path->str, &contents, NULL, &err); | |
486 | if (!status) { | |
487 | sr_err("Error reading shunt resistance: %s", err->message); | |
488 | ret = SR_ERR_IO; | |
a64fec2b | 489 | g_error_free(err); |
61f2b7f7 BG |
490 | goto out; |
491 | } | |
492 | ||
493 | *shunt = UOHM_TO_MOHM(strtol(contents, NULL, 10)); | |
494 | ||
495 | out: | |
496 | g_string_free(path, TRUE); | |
497 | return ret; | |
498 | } | |
499 | ||
391e23a9 | 500 | SR_PRIV int bl_acme_set_shunt(const struct sr_channel_group *cg, uint64_t shunt) |
61f2b7f7 BG |
501 | { |
502 | GString *path = g_string_sized_new(64);; | |
503 | int status, ret = SR_OK; | |
504 | FILE *fd; | |
505 | ||
506 | status = get_shunt_path(cg, path); | |
507 | if (status != SR_OK) { | |
508 | ret = status; | |
509 | goto out; | |
510 | } | |
511 | ||
512 | /* | |
513 | * Can't use g_file_set_contents() here, as it calls open() with | |
514 | * O_EXEC flag in a sysfs directory thus failing with EACCES. | |
515 | */ | |
516 | fd = g_fopen(path->str, "w"); | |
517 | if (!fd) { | |
7237e912 | 518 | sr_err("Error opening %s: %s", path->str, g_strerror(errno)); |
350b8b07 BG |
519 | ret = SR_ERR_IO; |
520 | goto out; | |
61f2b7f7 BG |
521 | } |
522 | ||
34527854 | 523 | g_fprintf(fd, "%" PRIu64 "\n", MOHM_TO_UOHM(shunt)); |
61f2b7f7 BG |
524 | fclose(fd); |
525 | ||
526 | out: | |
527 | g_string_free(path, TRUE); | |
528 | return ret; | |
529 | } | |
530 | ||
740ad48a BG |
531 | SR_PRIV int bl_acme_read_power_state(const struct sr_channel_group *cg, |
532 | gboolean *off) | |
533 | { | |
534 | struct channel_group_priv *cgp; | |
535 | int val; | |
536 | ||
537 | cgp = cg->priv; | |
538 | ||
1fe04eb8 | 539 | if (!bl_acme_probe_has_pws(cg)) { |
740ad48a BG |
540 | sr_err("Probe has no power-switch"); |
541 | return SR_ERR_ARG; | |
542 | } | |
543 | ||
4678bdb6 | 544 | val = sr_gpio_getval_export(cgp->pws_gpio); |
740ad48a BG |
545 | *off = val ? FALSE : TRUE; |
546 | ||
547 | return SR_OK; | |
548 | } | |
549 | ||
550 | SR_PRIV int bl_acme_set_power_off(const struct sr_channel_group *cg, | |
551 | gboolean off) | |
552 | { | |
553 | struct channel_group_priv *cgp; | |
09d217a4 | 554 | int val; |
740ad48a BG |
555 | |
556 | cgp = cg->priv; | |
557 | ||
1fe04eb8 | 558 | if (!bl_acme_probe_has_pws(cg)) { |
740ad48a BG |
559 | sr_err("Probe has no power-switch"); |
560 | return SR_ERR_ARG; | |
561 | } | |
562 | ||
4678bdb6 | 563 | val = sr_gpio_setval_export(cgp->pws_gpio, off ? 0 : 1); |
192d37e7 BG |
564 | if (val < 0) { |
565 | sr_err("Error setting power-off state: gpio: %d", | |
4678bdb6 | 566 | cgp->pws_gpio); |
192d37e7 BG |
567 | return SR_ERR_IO; |
568 | } | |
740ad48a BG |
569 | |
570 | return SR_OK; | |
571 | } | |
572 | ||
6b80b80d | 573 | static int channel_to_mq(struct sr_channel *ch) |
dfaee1de | 574 | { |
6b80b80d BG |
575 | struct channel_priv *chp; |
576 | ||
577 | chp = ch->priv; | |
578 | ||
579 | switch (chp->ch_type) { | |
580 | case ENRG_PWR: | |
581 | return SR_MQ_POWER; | |
582 | case ENRG_CURR: | |
583 | return SR_MQ_CURRENT; | |
584 | case ENRG_VOL: | |
585 | return SR_MQ_VOLTAGE; | |
391e23a9 | 586 | case TEMP_IN: /* Fallthrough */ |
6b80b80d BG |
587 | case TEMP_OUT: |
588 | return SR_MQ_TEMPERATURE; | |
589 | default: | |
590 | return -1; | |
591 | } | |
592 | } | |
593 | ||
594 | static int channel_to_unit(struct sr_channel *ch) | |
595 | { | |
596 | struct channel_priv *chp; | |
597 | ||
598 | chp = ch->priv; | |
599 | ||
600 | switch (chp->ch_type) { | |
601 | case ENRG_PWR: | |
602 | return SR_UNIT_WATT; | |
603 | case ENRG_CURR: | |
604 | return SR_UNIT_AMPERE; | |
605 | case ENRG_VOL: | |
606 | return SR_UNIT_VOLT; | |
391e23a9 | 607 | case TEMP_IN: /* Fallthrough */ |
6b80b80d BG |
608 | case TEMP_OUT: |
609 | return SR_UNIT_CELSIUS; | |
610 | default: | |
611 | return -1; | |
612 | } | |
613 | } | |
614 | ||
615 | /* We need to scale measurements down from the units used by the drivers. */ | |
616 | static float adjust_data(int val, int type) | |
617 | { | |
618 | switch (type) { | |
619 | case ENRG_PWR: | |
620 | return ((float)val) / 1000000.0; | |
391e23a9 UH |
621 | case ENRG_CURR: /* Fallthrough */ |
622 | case ENRG_VOL: /* Fallthrough */ | |
623 | case TEMP_IN: /* Fallthrough */ | |
6b80b80d BG |
624 | case TEMP_OUT: |
625 | return ((float)val) / 1000.0; | |
626 | default: | |
627 | return 0.0; | |
628 | } | |
629 | } | |
630 | ||
631 | static float read_sample(struct sr_channel *ch) | |
632 | { | |
633 | struct channel_priv *chp; | |
4e88b86c | 634 | char buf[16]; |
6b80b80d BG |
635 | ssize_t len; |
636 | int fd; | |
637 | ||
4e88b86c DL |
638 | chp = ch->priv; |
639 | fd = chp->fd; | |
640 | ||
641 | lseek(fd, 0, SEEK_SET); | |
642 | ||
643 | len = read(fd, buf, sizeof(buf)); | |
644 | if (len < 0) { | |
6433156c | 645 | sr_err("Error reading from channel %s (hwmon: %d): %s", |
7237e912 | 646 | ch->name, chp->probe->hwmon_num, g_strerror(errno)); |
4e88b86c DL |
647 | ch->enabled = FALSE; |
648 | return -1.0; | |
649 | } | |
650 | ||
651 | return adjust_data(strtol(buf, NULL, 10), chp->ch_type); | |
652 | } | |
653 | ||
654 | SR_PRIV int bl_acme_open_channel(struct sr_channel *ch) | |
655 | { | |
656 | struct channel_priv *chp; | |
2c240774 UH |
657 | char path[64]; |
658 | const char *file; | |
4e88b86c DL |
659 | int fd; |
660 | ||
6b80b80d BG |
661 | chp = ch->priv; |
662 | ||
663 | switch (chp->ch_type) { | |
664 | case ENRG_PWR: file = "power1_input"; break; | |
665 | case ENRG_CURR: file = "curr1_input"; break; | |
666 | case ENRG_VOL: file = "in1_input"; break; | |
667 | case TEMP_IN: file = "temp1_input"; break; | |
668 | case TEMP_OUT: file = "temp2_input"; break; | |
669 | default: | |
391e23a9 | 670 | sr_err("Invalid channel type: %d.", chp->ch_type); |
4e88b86c | 671 | return SR_ERR; |
6b80b80d BG |
672 | } |
673 | ||
391e23a9 | 674 | snprintf(path, sizeof(path), "/sys/class/hwmon/hwmon%d/%s", |
6b80b80d | 675 | chp->probe->hwmon_num, file); |
4e88b86c | 676 | |
6b80b80d BG |
677 | fd = open(path, O_RDONLY); |
678 | if (fd < 0) { | |
7237e912 | 679 | sr_err("Error opening %s: %s", path, g_strerror(errno)); |
6b80b80d | 680 | ch->enabled = FALSE; |
4e88b86c | 681 | return SR_ERR; |
6b80b80d BG |
682 | } |
683 | ||
4e88b86c | 684 | chp->fd = fd; |
6b80b80d | 685 | |
4e88b86c DL |
686 | return 0; |
687 | } | |
688 | ||
689 | SR_PRIV void bl_acme_close_channel(struct sr_channel *ch) | |
690 | { | |
691 | struct channel_priv *chp; | |
692 | ||
693 | chp = ch->priv; | |
694 | close(chp->fd); | |
695 | chp->fd = -1; | |
6b80b80d BG |
696 | } |
697 | ||
698 | SR_PRIV int bl_acme_receive_data(int fd, int revents, void *cb_data) | |
699 | { | |
a0648b1a | 700 | uint64_t nrexpiration; |
6b80b80d | 701 | struct sr_datafeed_packet packet, framep; |
5faebab2 | 702 | struct sr_datafeed_analog_old analog; |
6b80b80d BG |
703 | struct sr_dev_inst *sdi; |
704 | struct sr_channel *ch; | |
7e5a048f | 705 | struct channel_priv *chp; |
dfaee1de | 706 | struct dev_context *devc; |
6b80b80d | 707 | GSList *chl, chonly; |
7e5a048f | 708 | unsigned i; |
dfaee1de BG |
709 | |
710 | (void)fd; | |
6b80b80d BG |
711 | (void)revents; |
712 | ||
713 | sdi = cb_data; | |
714 | if (!sdi) | |
715 | return TRUE; | |
dfaee1de | 716 | |
6b80b80d BG |
717 | devc = sdi->priv; |
718 | if (!devc) | |
dfaee1de BG |
719 | return TRUE; |
720 | ||
5faebab2 | 721 | packet.type = SR_DF_ANALOG_OLD; |
6b80b80d | 722 | packet.payload = &analog; |
5faebab2 | 723 | memset(&analog, 0, sizeof(struct sr_datafeed_analog_old)); |
6b80b80d | 724 | |
a0648b1a DL |
725 | if (read(devc->timer_fd, &nrexpiration, sizeof(nrexpiration)) < 0) { |
726 | sr_warn("Failed to read timer information"); | |
727 | return TRUE; | |
728 | } | |
729 | ||
6b80b80d | 730 | /* |
a0648b1a DL |
731 | * We were not able to process the previous timer expiration, we are |
732 | * overloaded. | |
6b80b80d | 733 | */ |
a0648b1a DL |
734 | if (nrexpiration > 1) |
735 | devc->samples_missed += nrexpiration - 1; | |
6b80b80d | 736 | |
6b80b80d | 737 | /* |
7e5a048f BG |
738 | * XXX This is a nasty workaround... |
739 | * | |
740 | * At high sampling rates and maximum channels we are not able to | |
741 | * acquire samples fast enough, even though frontends still think | |
742 | * that samples arrive on time. This causes shifts in frontend | |
743 | * plots. | |
744 | * | |
745 | * To compensate for the delay we check if any clock events were | |
746 | * missed and - if so - don't really read the next value, but send | |
747 | * the same sample as fast as possible. We do it until we are back | |
748 | * on schedule. | |
749 | * | |
750 | * At high sampling rate this doesn't seem to visibly reduce the | |
751 | * accuracy. | |
6b80b80d | 752 | */ |
7e5a048f BG |
753 | for (i = 0; i < nrexpiration; i++) { |
754 | framep.type = SR_DF_FRAME_BEGIN; | |
695dc859 | 755 | sr_session_send(sdi, &framep); |
7e5a048f BG |
756 | |
757 | /* | |
758 | * Due to different units used in each channel we're sending | |
759 | * samples one-by-one. | |
760 | */ | |
761 | for (chl = sdi->channels; chl; chl = chl->next) { | |
762 | ch = chl->data; | |
763 | chp = ch->priv; | |
6b80b80d | 764 | |
7e5a048f BG |
765 | if (!ch->enabled) |
766 | continue; | |
767 | chonly.next = NULL; | |
768 | chonly.data = ch; | |
769 | analog.channels = &chonly; | |
770 | analog.num_samples = 1; | |
771 | analog.mq = channel_to_mq(chl->data); | |
772 | analog.unit = channel_to_unit(ch); | |
773 | ||
774 | if (i < 1) | |
775 | chp->val = read_sample(ch); | |
776 | ||
777 | analog.data = &chp->val; | |
695dc859 | 778 | sr_session_send(sdi, &packet); |
7e5a048f BG |
779 | } |
780 | ||
781 | framep.type = SR_DF_FRAME_END; | |
695dc859 | 782 | sr_session_send(sdi, &framep); |
7e5a048f | 783 | } |
6b80b80d | 784 | |
d54a7c42 LPC |
785 | sr_sw_limits_update_samples_read(&devc->limits, 1); |
786 | ||
787 | if (sr_sw_limits_check(&devc->limits)) { | |
695dc859 | 788 | sdi->driver->dev_acquisition_stop(sdi); |
dfaee1de | 789 | return TRUE; |
dfaee1de BG |
790 | } |
791 | ||
792 | return TRUE; | |
793 | } |