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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 <stdlib.h> | |
24 | #include <string.h> | |
25 | #include <libsigrok/libsigrok.h> | |
26 | #include "libsigrok-internal.h" | |
27 | #include "protocol.h" | |
28 | ||
29 | #define VICTOR_VID 0x1244 | |
30 | #define VICTOR_PID 0xd237 | |
31 | #define VICTOR_VENDOR "Victor" | |
32 | #define VICTOR_INTERFACE 0 | |
33 | #define VICTOR_ENDPOINT (LIBUSB_ENDPOINT_IN | 1) | |
34 | static int dev_acquisition_stop(struct sr_dev_inst *sdi); | |
35 | ||
36 | static const uint32_t drvopts[] = { | |
37 | SR_CONF_MULTIMETER, | |
38 | }; | |
39 | ||
40 | static const uint32_t scanopts[] = { | |
41 | SR_CONF_CONN, | |
42 | }; | |
43 | ||
44 | static const uint32_t devopts[] = { | |
45 | SR_CONF_CONTINUOUS, | |
46 | SR_CONF_LIMIT_SAMPLES | SR_CONF_SET, | |
47 | SR_CONF_LIMIT_MSEC | SR_CONF_SET, | |
48 | SR_CONF_CONN | SR_CONF_GET, | |
49 | }; | |
50 | ||
51 | static GSList *scan(struct sr_dev_driver *di, GSList *options) | |
52 | { | |
53 | struct drv_context *drvc; | |
54 | struct dev_context *devc; | |
55 | struct sr_dev_inst *sdi; | |
56 | struct libusb_device_descriptor des; | |
57 | libusb_device **devlist; | |
58 | GSList *devices; | |
59 | int i; | |
60 | char connection_id[64]; | |
61 | ||
62 | (void)options; | |
63 | ||
64 | drvc = di->context; | |
65 | ||
66 | devices = NULL; | |
67 | libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist); | |
68 | for (i = 0; devlist[i]; i++) { | |
69 | libusb_get_device_descriptor(devlist[i], &des); | |
70 | ||
71 | if (des.idVendor != VICTOR_VID || des.idProduct != VICTOR_PID) | |
72 | continue; | |
73 | ||
74 | usb_get_port_path(devlist[i], connection_id, sizeof(connection_id)); | |
75 | ||
76 | sdi = g_malloc0(sizeof(struct sr_dev_inst)); | |
77 | sdi->status = SR_ST_INACTIVE; | |
78 | sdi->vendor = g_strdup(VICTOR_VENDOR); | |
79 | sdi->driver = di; | |
80 | sdi->connection_id = g_strdup(connection_id); | |
81 | devc = g_malloc0(sizeof(struct dev_context)); | |
82 | sr_sw_limits_init(&devc->limits); | |
83 | sdi->priv = devc; | |
84 | ||
85 | sr_channel_new(sdi, 0, SR_CHANNEL_ANALOG, TRUE, "P1"); | |
86 | sdi->conn = sr_usb_dev_inst_new(libusb_get_bus_number(devlist[i]), | |
87 | libusb_get_device_address(devlist[i]), NULL); | |
88 | sdi->inst_type = SR_INST_USB; | |
89 | ||
90 | drvc->instances = g_slist_append(drvc->instances, sdi); | |
91 | devices = g_slist_append(devices, sdi); | |
92 | } | |
93 | libusb_free_device_list(devlist, 1); | |
94 | ||
95 | return devices; | |
96 | } | |
97 | ||
98 | static int dev_open(struct sr_dev_inst *sdi) | |
99 | { | |
100 | struct sr_dev_driver *di = sdi->driver; | |
101 | struct drv_context *drvc = di->context; | |
102 | struct sr_usb_dev_inst *usb; | |
103 | int ret; | |
104 | ||
105 | usb = sdi->conn; | |
106 | ||
107 | ret = sr_usb_open(drvc->sr_ctx->libusb_ctx, usb); | |
108 | if (ret != SR_OK) | |
109 | return ret; | |
110 | ||
111 | /* The device reports as HID class, so the kernel would have | |
112 | * claimed it. */ | |
113 | if (libusb_kernel_driver_active(usb->devhdl, 0) == 1) { | |
114 | if ((ret = libusb_detach_kernel_driver(usb->devhdl, 0)) < 0) { | |
115 | sr_err("Failed to detach kernel driver: %s.", | |
116 | libusb_error_name(ret)); | |
117 | return SR_ERR; | |
118 | } | |
119 | } | |
120 | ||
121 | if ((ret = libusb_claim_interface(usb->devhdl, | |
122 | VICTOR_INTERFACE))) { | |
123 | sr_err("Failed to claim interface: %s.", libusb_error_name(ret)); | |
124 | return SR_ERR; | |
125 | } | |
126 | sdi->status = SR_ST_ACTIVE; | |
127 | ||
128 | return SR_OK; | |
129 | } | |
130 | ||
131 | static int dev_close(struct sr_dev_inst *sdi) | |
132 | { | |
133 | struct sr_usb_dev_inst *usb; | |
134 | ||
135 | usb = sdi->conn; | |
136 | ||
137 | if (!usb->devhdl) | |
138 | /* Nothing to do. */ | |
139 | return SR_OK; | |
140 | ||
141 | libusb_release_interface(usb->devhdl, VICTOR_INTERFACE); | |
142 | libusb_close(usb->devhdl); | |
143 | usb->devhdl = NULL; | |
144 | sdi->status = SR_ST_INACTIVE; | |
145 | ||
146 | return SR_OK; | |
147 | } | |
148 | ||
149 | static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi, | |
150 | const struct sr_channel_group *cg) | |
151 | { | |
152 | struct dev_context *devc = sdi->priv; | |
153 | struct sr_usb_dev_inst *usb; | |
154 | char str[128]; | |
155 | ||
156 | (void)cg; | |
157 | ||
158 | switch (key) { | |
159 | case SR_CONF_CONN: | |
160 | if (!sdi || !sdi->conn) | |
161 | return SR_ERR_ARG; | |
162 | usb = sdi->conn; | |
163 | snprintf(str, 128, "%d.%d", usb->bus, usb->address); | |
164 | *data = g_variant_new_string(str); | |
165 | break; | |
166 | case SR_CONF_LIMIT_SAMPLES: | |
167 | case SR_CONF_LIMIT_MSEC: | |
168 | return sr_sw_limits_config_get(&devc->limits, key, data); | |
169 | default: | |
170 | return SR_ERR_NA; | |
171 | } | |
172 | ||
173 | return SR_OK; | |
174 | } | |
175 | ||
176 | static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi, | |
177 | const struct sr_channel_group *cg) | |
178 | { | |
179 | struct dev_context *devc; | |
180 | ||
181 | (void)cg; | |
182 | ||
183 | if (sdi->status != SR_ST_ACTIVE) | |
184 | return SR_ERR_DEV_CLOSED; | |
185 | ||
186 | devc = sdi->priv; | |
187 | ||
188 | return sr_sw_limits_config_set(&devc->limits, key, data); | |
189 | } | |
190 | ||
191 | static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi, | |
192 | const struct sr_channel_group *cg) | |
193 | { | |
194 | (void)sdi; | |
195 | (void)cg; | |
196 | ||
197 | switch (key) { | |
198 | case SR_CONF_SCAN_OPTIONS: | |
199 | *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32, | |
200 | scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t)); | |
201 | break; | |
202 | case SR_CONF_DEVICE_OPTIONS: | |
203 | if (!sdi) | |
204 | *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32, | |
205 | drvopts, ARRAY_SIZE(drvopts), sizeof(uint32_t)); | |
206 | else | |
207 | *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32, | |
208 | devopts, ARRAY_SIZE(devopts), sizeof(uint32_t)); | |
209 | break; | |
210 | default: | |
211 | return SR_ERR_NA; | |
212 | } | |
213 | ||
214 | return SR_OK; | |
215 | } | |
216 | ||
217 | static void LIBUSB_CALL receive_transfer(struct libusb_transfer *transfer) | |
218 | { | |
219 | struct dev_context *devc; | |
220 | struct sr_dev_inst *sdi; | |
221 | int ret; | |
222 | ||
223 | sdi = transfer->user_data; | |
224 | devc = sdi->priv; | |
225 | if (transfer->status == LIBUSB_TRANSFER_NO_DEVICE) { | |
226 | /* USB device was unplugged. */ | |
227 | dev_acquisition_stop(sdi); | |
228 | } else if (transfer->status == LIBUSB_TRANSFER_COMPLETED) { | |
229 | sr_dbg("Got %d-byte packet.", transfer->actual_length); | |
230 | if (transfer->actual_length == DMM_DATA_SIZE) { | |
231 | victor_dmm_receive_data(sdi, transfer->buffer); | |
232 | if (sr_sw_limits_check(&devc->limits)) | |
233 | dev_acquisition_stop(sdi); | |
234 | } | |
235 | } | |
236 | /* Anything else is either an error or a timeout, which is fine: | |
237 | * we were just going to send another transfer request anyway. */ | |
238 | ||
239 | if (sdi->status == SR_ST_ACTIVE) { | |
240 | /* Send the same request again. */ | |
241 | if ((ret = libusb_submit_transfer(transfer) != 0)) { | |
242 | sr_err("Unable to resubmit transfer: %s.", | |
243 | libusb_error_name(ret)); | |
244 | g_free(transfer->buffer); | |
245 | libusb_free_transfer(transfer); | |
246 | dev_acquisition_stop(sdi); | |
247 | } | |
248 | } else { | |
249 | /* This was the last transfer we're going to receive, so | |
250 | * clean up now. */ | |
251 | g_free(transfer->buffer); | |
252 | libusb_free_transfer(transfer); | |
253 | } | |
254 | } | |
255 | ||
256 | static int handle_events(int fd, int revents, void *cb_data) | |
257 | { | |
258 | struct dev_context *devc; | |
259 | struct drv_context *drvc; | |
260 | struct sr_dev_inst *sdi; | |
261 | struct sr_dev_driver *di; | |
262 | struct timeval tv; | |
263 | ||
264 | (void)fd; | |
265 | (void)revents; | |
266 | ||
267 | sdi = cb_data; | |
268 | devc = sdi->priv; | |
269 | di = sdi->driver; | |
270 | drvc = di->context; | |
271 | ||
272 | if (sr_sw_limits_check(&devc->limits)) | |
273 | dev_acquisition_stop(sdi); | |
274 | ||
275 | if (sdi->status == SR_ST_STOPPING) { | |
276 | usb_source_remove(sdi->session, drvc->sr_ctx); | |
277 | dev_close(sdi); | |
278 | std_session_send_df_end(sdi, LOG_PREFIX); | |
279 | } | |
280 | ||
281 | memset(&tv, 0, sizeof(struct timeval)); | |
282 | libusb_handle_events_timeout_completed(drvc->sr_ctx->libusb_ctx, &tv, | |
283 | NULL); | |
284 | ||
285 | return TRUE; | |
286 | } | |
287 | ||
288 | static int dev_acquisition_start(const struct sr_dev_inst *sdi) | |
289 | { | |
290 | struct sr_dev_driver *di = sdi->driver; | |
291 | struct drv_context *drvc = di->context; | |
292 | struct sr_usb_dev_inst *usb; | |
293 | struct libusb_transfer *transfer; | |
294 | int ret; | |
295 | unsigned char *buf; | |
296 | ||
297 | if (sdi->status != SR_ST_ACTIVE) | |
298 | return SR_ERR_DEV_CLOSED; | |
299 | ||
300 | usb = sdi->conn; | |
301 | ||
302 | std_session_send_df_header(sdi, LOG_PREFIX); | |
303 | ||
304 | usb_source_add(sdi->session, drvc->sr_ctx, 100, | |
305 | handle_events, (void *)sdi); | |
306 | ||
307 | buf = g_malloc(DMM_DATA_SIZE); | |
308 | transfer = libusb_alloc_transfer(0); | |
309 | /* Each transfer request gets 100ms to arrive before it's restarted. | |
310 | * The device only sends 1 transfer/second no matter how many | |
311 | * times you ask, but we want to keep step with the USB events | |
312 | * handling above. */ | |
313 | libusb_fill_interrupt_transfer(transfer, usb->devhdl, | |
314 | VICTOR_ENDPOINT, buf, DMM_DATA_SIZE, receive_transfer, | |
315 | (struct sr_dev_inst *)sdi, 100); | |
316 | if ((ret = libusb_submit_transfer(transfer) != 0)) { | |
317 | sr_err("Unable to submit transfer: %s.", libusb_error_name(ret)); | |
318 | libusb_free_transfer(transfer); | |
319 | g_free(buf); | |
320 | return SR_ERR; | |
321 | } | |
322 | ||
323 | return SR_OK; | |
324 | } | |
325 | ||
326 | static int dev_acquisition_stop(struct sr_dev_inst *sdi) | |
327 | { | |
328 | if (sdi->status != SR_ST_ACTIVE) { | |
329 | sr_err("Device not active, can't stop acquisition."); | |
330 | return SR_ERR; | |
331 | } | |
332 | ||
333 | sdi->status = SR_ST_STOPPING; | |
334 | ||
335 | return SR_OK; | |
336 | } | |
337 | ||
338 | static struct sr_dev_driver victor_dmm_driver_info = { | |
339 | .name = "victor-dmm", | |
340 | .longname = "Victor DMMs", | |
341 | .api_version = 1, | |
342 | .init = std_init, | |
343 | .cleanup = std_cleanup, | |
344 | .scan = scan, | |
345 | .dev_list = std_dev_list, | |
346 | .dev_clear = NULL, | |
347 | .config_get = config_get, | |
348 | .config_set = config_set, | |
349 | .config_list = config_list, | |
350 | .dev_open = dev_open, | |
351 | .dev_close = dev_close, | |
352 | .dev_acquisition_start = dev_acquisition_start, | |
353 | .dev_acquisition_stop = dev_acquisition_stop, | |
354 | .context = NULL, | |
355 | }; | |
356 | SR_REGISTER_DEV_DRIVER(victor_dmm_driver_info); |