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1 | /* | |
2 | * This file is part of the libsigrok project. | |
3 | * | |
4 | * Copyright (C) 2012 Bert Vermeulen <bert@biot.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 <glib.h> | |
22 | #include <libusb.h> | |
23 | #include <libsigrok/libsigrok.h> | |
24 | #include "libsigrok-internal.h" | |
25 | #include "protocol.h" | |
26 | ||
27 | static const uint32_t scanopts[] = { | |
28 | SR_CONF_CONN, | |
29 | }; | |
30 | ||
31 | static const uint32_t devopts[] = { | |
32 | SR_CONF_THERMOMETER, | |
33 | SR_CONF_HYGROMETER, | |
34 | SR_CONF_CONN | SR_CONF_GET, | |
35 | SR_CONF_LIMIT_SAMPLES | SR_CONF_GET | SR_CONF_SET, | |
36 | SR_CONF_DATALOG | SR_CONF_GET | SR_CONF_SET, | |
37 | }; | |
38 | ||
39 | static GSList *scan(struct sr_dev_driver *di, GSList *options) | |
40 | { | |
41 | struct drv_context *drvc; | |
42 | struct sr_dev_inst *sdi; | |
43 | struct sr_usb_dev_inst *usb; | |
44 | struct sr_config *src; | |
45 | GSList *usb_devices, *devices, *l; | |
46 | const char *conn; | |
47 | ||
48 | drvc = di->context; | |
49 | ||
50 | conn = NULL; | |
51 | for (l = options; l; l = l->next) { | |
52 | src = l->data; | |
53 | switch (src->key) { | |
54 | case SR_CONF_CONN: | |
55 | conn = g_variant_get_string(src->data, NULL); | |
56 | break; | |
57 | } | |
58 | } | |
59 | if (!conn) | |
60 | return NULL; | |
61 | ||
62 | devices = NULL; | |
63 | if ((usb_devices = sr_usb_find(drvc->sr_ctx->libusb_ctx, conn))) { | |
64 | /* We have a list of sr_usb_dev_inst matching the connection | |
65 | * string. Wrap them in sr_dev_inst and we're done. */ | |
66 | for (l = usb_devices; l; l = l->next) { | |
67 | usb = l->data; | |
68 | if (!(sdi = lascar_scan(usb->bus, usb->address))) { | |
69 | /* Not a Lascar EL-USB. */ | |
70 | g_free(usb); | |
71 | continue; | |
72 | } | |
73 | sdi->inst_type = SR_INST_USB; | |
74 | sdi->conn = usb; | |
75 | devices = g_slist_append(devices, sdi); | |
76 | } | |
77 | g_slist_free(usb_devices); | |
78 | } else | |
79 | g_slist_free_full(usb_devices, g_free); | |
80 | ||
81 | return std_scan_complete(di, devices); | |
82 | } | |
83 | ||
84 | static int dev_open(struct sr_dev_inst *sdi) | |
85 | { | |
86 | struct sr_dev_driver *di = sdi->driver; | |
87 | struct drv_context *drvc = di->context;; | |
88 | struct sr_usb_dev_inst *usb; | |
89 | int ret; | |
90 | ||
91 | usb = sdi->conn; | |
92 | ||
93 | if (sr_usb_open(drvc->sr_ctx->libusb_ctx, usb) != SR_OK) | |
94 | return SR_ERR; | |
95 | ||
96 | if ((ret = libusb_claim_interface(usb->devhdl, LASCAR_INTERFACE))) { | |
97 | sr_err("Failed to claim interface: %s.", libusb_error_name(ret)); | |
98 | return SR_ERR; | |
99 | } | |
100 | ||
101 | return SR_OK; | |
102 | } | |
103 | ||
104 | static int dev_close(struct sr_dev_inst *sdi) | |
105 | { | |
106 | struct sr_usb_dev_inst *usb; | |
107 | ||
108 | usb = sdi->conn; | |
109 | ||
110 | if (!usb->devhdl) | |
111 | return SR_ERR_BUG; | |
112 | ||
113 | libusb_release_interface(usb->devhdl, LASCAR_INTERFACE); | |
114 | libusb_close(usb->devhdl); | |
115 | usb->devhdl = NULL; | |
116 | ||
117 | return SR_OK; | |
118 | } | |
119 | ||
120 | static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi, | |
121 | const struct sr_channel_group *cg) | |
122 | { | |
123 | struct dev_context *devc; | |
124 | struct sr_usb_dev_inst *usb; | |
125 | int ret; | |
126 | char str[128]; | |
127 | ||
128 | (void)cg; | |
129 | ||
130 | devc = sdi->priv; | |
131 | switch (key) { | |
132 | case SR_CONF_CONN: | |
133 | if (!sdi || !sdi->conn) | |
134 | return SR_ERR_ARG; | |
135 | usb = sdi->conn; | |
136 | snprintf(str, 128, "%d.%d", usb->bus, usb->address); | |
137 | *data = g_variant_new_string(str); | |
138 | break; | |
139 | case SR_CONF_DATALOG: | |
140 | if (!sdi) | |
141 | return SR_ERR_ARG; | |
142 | if ((ret = lascar_is_logging(sdi)) == -1) | |
143 | return SR_ERR; | |
144 | *data = g_variant_new_boolean(ret ? TRUE : FALSE); | |
145 | break; | |
146 | case SR_CONF_LIMIT_SAMPLES: | |
147 | *data = g_variant_new_uint64(devc->limit_samples); | |
148 | break; | |
149 | default: | |
150 | return SR_ERR_NA; | |
151 | } | |
152 | ||
153 | return SR_OK; | |
154 | } | |
155 | ||
156 | static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi, | |
157 | const struct sr_channel_group *cg) | |
158 | { | |
159 | struct dev_context *devc; | |
160 | int ret; | |
161 | ||
162 | (void)cg; | |
163 | ||
164 | devc = sdi->priv; | |
165 | ret = SR_OK; | |
166 | switch (key) { | |
167 | case SR_CONF_DATALOG: | |
168 | if (g_variant_get_boolean(data)) | |
169 | ret = lascar_start_logging(sdi); | |
170 | else | |
171 | ret = lascar_stop_logging(sdi); | |
172 | break; | |
173 | case SR_CONF_LIMIT_SAMPLES: | |
174 | devc->limit_samples = g_variant_get_uint64(data); | |
175 | break; | |
176 | default: | |
177 | ret = SR_ERR_NA; | |
178 | } | |
179 | ||
180 | return ret; | |
181 | } | |
182 | ||
183 | static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi, | |
184 | const struct sr_channel_group *cg) | |
185 | { | |
186 | (void)sdi; | |
187 | (void)cg; | |
188 | ||
189 | switch (key) { | |
190 | case SR_CONF_SCAN_OPTIONS: | |
191 | *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32, | |
192 | scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t)); | |
193 | break; | |
194 | case SR_CONF_DEVICE_OPTIONS: | |
195 | *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32, | |
196 | devopts, ARRAY_SIZE(devopts), sizeof(uint32_t)); | |
197 | break; | |
198 | default: | |
199 | return SR_ERR_NA; | |
200 | } | |
201 | ||
202 | return SR_OK; | |
203 | } | |
204 | ||
205 | static void LIBUSB_CALL mark_xfer(struct libusb_transfer *xfer) | |
206 | { | |
207 | ||
208 | if (xfer->status == LIBUSB_TRANSFER_COMPLETED) | |
209 | xfer->user_data = GINT_TO_POINTER(1); | |
210 | else | |
211 | xfer->user_data = GINT_TO_POINTER(-1); | |
212 | ||
213 | } | |
214 | ||
215 | /* The Lascar software, in its infinite ignorance, reads a set of four | |
216 | * bytes from the device config struct and interprets it as a float. | |
217 | * That only works because they only use windows, and only on x86. However | |
218 | * we may be running on any architecture, any operating system. So we have | |
219 | * to convert these four bytes as the Lascar software would on windows/x86, | |
220 | * to the local representation of a float. | |
221 | * The source format is little-endian, with IEEE 754-2008 BINARY32 encoding. */ | |
222 | static float binary32_le_to_float(unsigned char *buf) | |
223 | { | |
224 | GFloatIEEE754 f; | |
225 | ||
226 | f.v_float = 0; | |
227 | f.mpn.sign = (buf[3] & 0x80) ? 1 : 0; | |
228 | f.mpn.biased_exponent = (buf[3] << 1) | (buf[2] >> 7); | |
229 | f.mpn.mantissa = buf[0] | (buf[1] << 8) | ((buf[2] & 0x7f) << 16); | |
230 | ||
231 | return f.v_float; | |
232 | } | |
233 | ||
234 | static int lascar_proc_config(const struct sr_dev_inst *sdi) | |
235 | { | |
236 | struct dev_context *devc; | |
237 | struct sr_usb_dev_inst *usb; | |
238 | int dummy, ret; | |
239 | ||
240 | devc = sdi->priv; | |
241 | usb = sdi->conn; | |
242 | ||
243 | if (lascar_get_config(usb->devhdl, devc->config, &dummy) != SR_OK) | |
244 | return SR_ERR; | |
245 | ||
246 | ret = SR_OK; | |
247 | switch (devc->profile->logformat) { | |
248 | case LOG_TEMP_RH: | |
249 | devc->sample_size = 2; | |
250 | devc->temp_unit = devc->config[0x2e] | (devc->config[0x2f] << 8); | |
251 | if (devc->temp_unit != 0 && devc->temp_unit != 1) { | |
252 | sr_dbg("invalid temperature unit %d", devc->temp_unit); | |
253 | /* Default to Celsius, we're all adults here. */ | |
254 | devc->temp_unit = 0; | |
255 | } else | |
256 | sr_dbg("temperature unit is %s", devc->temp_unit | |
257 | ? "Fahrenheit" : "Celsius"); | |
258 | break; | |
259 | case LOG_CO: | |
260 | devc->sample_size = 2; | |
261 | devc->co_high = binary32_le_to_float(devc->config + 0x24); | |
262 | devc->co_low = binary32_le_to_float(devc->config + 0x28); | |
263 | sr_dbg("EL-USB-CO calibration high %f low %f", devc->co_high, | |
264 | devc->co_low); | |
265 | break; | |
266 | default: | |
267 | ret = SR_ERR_ARG; | |
268 | } | |
269 | devc->logged_samples = devc->config[0x1e] | (devc->config[0x1f] << 8); | |
270 | sr_dbg("device log contains %d samples.", devc->logged_samples); | |
271 | ||
272 | return ret; | |
273 | } | |
274 | ||
275 | static int dev_acquisition_start(const struct sr_dev_inst *sdi) | |
276 | { | |
277 | struct sr_dev_driver *di = sdi->driver; | |
278 | struct sr_datafeed_packet packet; | |
279 | struct sr_datafeed_meta meta; | |
280 | struct sr_config *src; | |
281 | struct dev_context *devc; | |
282 | struct drv_context *drvc; | |
283 | struct sr_usb_dev_inst *usb; | |
284 | struct libusb_transfer *xfer_in, *xfer_out; | |
285 | struct timeval tv; | |
286 | uint64_t interval; | |
287 | int ret; | |
288 | unsigned char cmd[3], resp[4], *buf; | |
289 | ||
290 | drvc = di->context; | |
291 | devc = sdi->priv; | |
292 | usb = sdi->conn; | |
293 | ||
294 | if (lascar_proc_config(sdi) != SR_OK) | |
295 | return SR_ERR; | |
296 | ||
297 | sr_dbg("Starting log retrieval."); | |
298 | ||
299 | std_session_send_df_header(sdi); | |
300 | ||
301 | interval = (devc->config[0x1c] | (devc->config[0x1d] << 8)) * 1000; | |
302 | packet.type = SR_DF_META; | |
303 | packet.payload = &meta; | |
304 | src = sr_config_new(SR_CONF_SAMPLE_INTERVAL, g_variant_new_uint64(interval)); | |
305 | meta.config = g_slist_append(NULL, src); | |
306 | sr_session_send(sdi, &packet); | |
307 | g_free(src); | |
308 | ||
309 | if (devc->logged_samples == 0) { | |
310 | /* This ensures the frontend knows the session is done. */ | |
311 | std_session_send_df_end(sdi); | |
312 | return SR_OK; | |
313 | } | |
314 | ||
315 | if (!(xfer_in = libusb_alloc_transfer(0)) || | |
316 | !(xfer_out = libusb_alloc_transfer(0))) | |
317 | return SR_ERR; | |
318 | ||
319 | libusb_control_transfer(usb->devhdl, LIBUSB_REQUEST_TYPE_VENDOR, | |
320 | 0x00, 0xffff, 0x00, NULL, 0, 50); | |
321 | libusb_control_transfer(usb->devhdl, LIBUSB_REQUEST_TYPE_VENDOR, | |
322 | 0x02, 0x0002, 0x00, NULL, 0, 50); | |
323 | libusb_control_transfer(usb->devhdl, LIBUSB_REQUEST_TYPE_VENDOR, | |
324 | 0x02, 0x0001, 0x00, NULL, 0, 50); | |
325 | ||
326 | /* Flush input. The F321 requires this. */ | |
327 | while (libusb_bulk_transfer(usb->devhdl, LASCAR_EP_IN, resp, | |
328 | 256, &ret, 5) == 0 && ret > 0) | |
329 | ; | |
330 | ||
331 | libusb_fill_bulk_transfer(xfer_in, usb->devhdl, LASCAR_EP_IN, | |
332 | resp, sizeof(resp), mark_xfer, 0, BULK_XFER_TIMEOUT); | |
333 | if (libusb_submit_transfer(xfer_in) != 0) { | |
334 | libusb_free_transfer(xfer_in); | |
335 | libusb_free_transfer(xfer_out); | |
336 | return SR_ERR; | |
337 | } | |
338 | ||
339 | cmd[0] = 0x03; | |
340 | cmd[1] = 0xff; | |
341 | cmd[2] = 0xff; | |
342 | libusb_fill_bulk_transfer(xfer_out, usb->devhdl, LASCAR_EP_OUT, | |
343 | cmd, 3, mark_xfer, 0, 100); | |
344 | if (libusb_submit_transfer(xfer_out) != 0) { | |
345 | libusb_free_transfer(xfer_in); | |
346 | libusb_free_transfer(xfer_out); | |
347 | return SR_ERR; | |
348 | } | |
349 | ||
350 | tv.tv_sec = 0; | |
351 | tv.tv_usec = 0; | |
352 | while (!xfer_in->user_data || !xfer_out->user_data) { | |
353 | g_usleep(SLEEP_US_LONG); | |
354 | libusb_handle_events_timeout(drvc->sr_ctx->libusb_ctx, &tv); | |
355 | } | |
356 | if (xfer_in->user_data != GINT_TO_POINTER(1) || | |
357 | xfer_out->user_data != GINT_TO_POINTER(1)) { | |
358 | sr_dbg("no response to log transfer request"); | |
359 | libusb_free_transfer(xfer_in); | |
360 | libusb_free_transfer(xfer_out); | |
361 | return SR_ERR; | |
362 | } | |
363 | if (xfer_in->actual_length != 3 || xfer_in->buffer[0] != 2) { | |
364 | sr_dbg("invalid response to log transfer request"); | |
365 | libusb_free_transfer(xfer_in); | |
366 | libusb_free_transfer(xfer_out); | |
367 | return SR_ERR; | |
368 | } | |
369 | devc->log_size = xfer_in->buffer[1] + (xfer_in->buffer[2] << 8); | |
370 | libusb_free_transfer(xfer_out); | |
371 | ||
372 | usb_source_add(sdi->session, drvc->sr_ctx, 100, | |
373 | lascar_el_usb_handle_events, (void *)sdi); | |
374 | ||
375 | buf = g_malloc(4096); | |
376 | libusb_fill_bulk_transfer(xfer_in, usb->devhdl, LASCAR_EP_IN, | |
377 | buf, 4096, lascar_el_usb_receive_transfer, | |
378 | (struct sr_dev_inst *)sdi, 100); | |
379 | if ((ret = libusb_submit_transfer(xfer_in) != 0)) { | |
380 | sr_err("Unable to submit transfer: %s.", libusb_error_name(ret)); | |
381 | libusb_free_transfer(xfer_in); | |
382 | g_free(buf); | |
383 | return SR_ERR; | |
384 | } | |
385 | ||
386 | return SR_OK; | |
387 | } | |
388 | ||
389 | static int dev_acquisition_stop(struct sr_dev_inst *sdi) | |
390 | { | |
391 | sdi->status = SR_ST_STOPPING; | |
392 | /* TODO: free ongoing transfers? */ | |
393 | ||
394 | return SR_OK; | |
395 | } | |
396 | ||
397 | SR_PRIV struct sr_dev_driver lascar_el_usb_driver_info = { | |
398 | .name = "lascar-el-usb", | |
399 | .longname = "Lascar EL-USB", | |
400 | .api_version = 1, | |
401 | .init = std_init, | |
402 | .cleanup = std_cleanup, | |
403 | .scan = scan, | |
404 | .dev_list = std_dev_list, | |
405 | .dev_clear = NULL, | |
406 | .config_get = config_get, | |
407 | .config_set = config_set, | |
408 | .config_list = config_list, | |
409 | .dev_open = dev_open, | |
410 | .dev_close = dev_close, | |
411 | .dev_acquisition_start = dev_acquisition_start, | |
412 | .dev_acquisition_stop = dev_acquisition_stop, | |
413 | .context = NULL, | |
414 | }; | |
415 | SR_REGISTER_DEV_DRIVER(lascar_el_usb_driver_info); |