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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 | ||
35 | SR_PRIV struct sr_dev_driver victor_dmm_driver_info; | |
36 | static int dev_acquisition_stop(struct sr_dev_inst *sdi); | |
37 | ||
38 | static const uint32_t drvopts[] = { | |
39 | SR_CONF_MULTIMETER, | |
40 | }; | |
41 | ||
42 | static const uint32_t scanopts[] = { | |
43 | SR_CONF_CONN, | |
44 | }; | |
45 | ||
46 | static const uint32_t devopts[] = { | |
47 | SR_CONF_CONTINUOUS, | |
48 | SR_CONF_LIMIT_SAMPLES | SR_CONF_SET, | |
49 | SR_CONF_LIMIT_MSEC | SR_CONF_SET, | |
50 | SR_CONF_CONN | SR_CONF_GET, | |
51 | }; | |
52 | ||
53 | static int init(struct sr_dev_driver *di, struct sr_context *sr_ctx) | |
54 | { | |
55 | return std_init(sr_ctx, di, LOG_PREFIX); | |
56 | } | |
57 | ||
58 | static GSList *scan(struct sr_dev_driver *di, GSList *options) | |
59 | { | |
60 | struct drv_context *drvc; | |
61 | struct dev_context *devc; | |
62 | struct sr_dev_inst *sdi; | |
63 | struct libusb_device_descriptor des; | |
64 | libusb_device **devlist; | |
65 | GSList *devices; | |
66 | int i; | |
67 | char connection_id[64]; | |
68 | ||
69 | (void)options; | |
70 | ||
71 | drvc = di->context; | |
72 | ||
73 | devices = NULL; | |
74 | libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist); | |
75 | for (i = 0; devlist[i]; i++) { | |
76 | libusb_get_device_descriptor(devlist[i], &des); | |
77 | ||
78 | if (des.idVendor != VICTOR_VID || des.idProduct != VICTOR_PID) | |
79 | continue; | |
80 | ||
81 | usb_get_port_path(devlist[i], connection_id, sizeof(connection_id)); | |
82 | ||
83 | sdi = g_malloc0(sizeof(struct sr_dev_inst)); | |
84 | sdi->status = SR_ST_INACTIVE; | |
85 | sdi->vendor = g_strdup(VICTOR_VENDOR); | |
86 | sdi->driver = di; | |
87 | sdi->connection_id = g_strdup(connection_id); | |
88 | devc = g_malloc0(sizeof(struct dev_context)); | |
89 | sr_sw_limits_init(&devc->limits); | |
90 | sdi->priv = devc; | |
91 | ||
92 | sr_channel_new(sdi, 0, SR_CHANNEL_ANALOG, TRUE, "P1"); | |
93 | sdi->conn = sr_usb_dev_inst_new(libusb_get_bus_number(devlist[i]), | |
94 | libusb_get_device_address(devlist[i]), NULL); | |
95 | sdi->inst_type = SR_INST_USB; | |
96 | ||
97 | drvc->instances = g_slist_append(drvc->instances, sdi); | |
98 | devices = g_slist_append(devices, sdi); | |
99 | } | |
100 | libusb_free_device_list(devlist, 1); | |
101 | ||
102 | return devices; | |
103 | } | |
104 | ||
105 | static int dev_open(struct sr_dev_inst *sdi) | |
106 | { | |
107 | struct sr_dev_driver *di = sdi->driver; | |
108 | struct drv_context *drvc = di->context; | |
109 | struct sr_usb_dev_inst *usb; | |
110 | int ret; | |
111 | ||
112 | usb = sdi->conn; | |
113 | ||
114 | ret = sr_usb_open(drvc->sr_ctx->libusb_ctx, usb); | |
115 | if (ret != SR_OK) | |
116 | return ret; | |
117 | ||
118 | /* The device reports as HID class, so the kernel would have | |
119 | * claimed it. */ | |
120 | if (libusb_kernel_driver_active(usb->devhdl, 0) == 1) { | |
121 | if ((ret = libusb_detach_kernel_driver(usb->devhdl, 0)) < 0) { | |
122 | sr_err("Failed to detach kernel driver: %s.", | |
123 | libusb_error_name(ret)); | |
124 | return SR_ERR; | |
125 | } | |
126 | } | |
127 | ||
128 | if ((ret = libusb_claim_interface(usb->devhdl, | |
129 | VICTOR_INTERFACE))) { | |
130 | sr_err("Failed to claim interface: %s.", libusb_error_name(ret)); | |
131 | return SR_ERR; | |
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 | struct sr_usb_dev_inst *usb; | |
141 | ||
142 | usb = sdi->conn; | |
143 | ||
144 | if (!usb->devhdl) | |
145 | /* Nothing to do. */ | |
146 | return SR_OK; | |
147 | ||
148 | libusb_release_interface(usb->devhdl, VICTOR_INTERFACE); | |
149 | libusb_close(usb->devhdl); | |
150 | usb->devhdl = NULL; | |
151 | sdi->status = SR_ST_INACTIVE; | |
152 | ||
153 | return SR_OK; | |
154 | } | |
155 | ||
156 | static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi, | |
157 | const struct sr_channel_group *cg) | |
158 | { | |
159 | struct dev_context *devc = sdi->priv; | |
160 | struct sr_usb_dev_inst *usb; | |
161 | char str[128]; | |
162 | ||
163 | (void)cg; | |
164 | ||
165 | switch (key) { | |
166 | case SR_CONF_CONN: | |
167 | if (!sdi || !sdi->conn) | |
168 | return SR_ERR_ARG; | |
169 | usb = sdi->conn; | |
170 | snprintf(str, 128, "%d.%d", usb->bus, usb->address); | |
171 | *data = g_variant_new_string(str); | |
172 | break; | |
173 | case SR_CONF_LIMIT_SAMPLES: | |
174 | case SR_CONF_LIMIT_MSEC: | |
175 | return sr_sw_limits_config_get(&devc->limits, key, data); | |
176 | default: | |
177 | return SR_ERR_NA; | |
178 | } | |
179 | ||
180 | return SR_OK; | |
181 | } | |
182 | ||
183 | static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi, | |
184 | const struct sr_channel_group *cg) | |
185 | { | |
186 | struct dev_context *devc; | |
187 | ||
188 | (void)cg; | |
189 | ||
190 | if (sdi->status != SR_ST_ACTIVE) | |
191 | return SR_ERR_DEV_CLOSED; | |
192 | ||
193 | devc = sdi->priv; | |
194 | ||
195 | return sr_sw_limits_config_set(&devc->limits, key, data); | |
196 | } | |
197 | ||
198 | static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi, | |
199 | const struct sr_channel_group *cg) | |
200 | { | |
201 | (void)sdi; | |
202 | (void)cg; | |
203 | ||
204 | switch (key) { | |
205 | case SR_CONF_SCAN_OPTIONS: | |
206 | *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32, | |
207 | scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t)); | |
208 | break; | |
209 | case SR_CONF_DEVICE_OPTIONS: | |
210 | if (!sdi) | |
211 | *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32, | |
212 | drvopts, ARRAY_SIZE(drvopts), sizeof(uint32_t)); | |
213 | else | |
214 | *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32, | |
215 | devopts, ARRAY_SIZE(devopts), sizeof(uint32_t)); | |
216 | break; | |
217 | default: | |
218 | return SR_ERR_NA; | |
219 | } | |
220 | ||
221 | return SR_OK; | |
222 | } | |
223 | ||
224 | static void LIBUSB_CALL receive_transfer(struct libusb_transfer *transfer) | |
225 | { | |
226 | struct dev_context *devc; | |
227 | struct sr_dev_inst *sdi; | |
228 | int ret; | |
229 | ||
230 | sdi = transfer->user_data; | |
231 | devc = sdi->priv; | |
232 | if (transfer->status == LIBUSB_TRANSFER_NO_DEVICE) { | |
233 | /* USB device was unplugged. */ | |
234 | dev_acquisition_stop(sdi); | |
235 | } else if (transfer->status == LIBUSB_TRANSFER_COMPLETED) { | |
236 | sr_dbg("Got %d-byte packet.", transfer->actual_length); | |
237 | if (transfer->actual_length == DMM_DATA_SIZE) { | |
238 | victor_dmm_receive_data(sdi, transfer->buffer); | |
239 | if (sr_sw_limits_check(&devc->limits)) | |
240 | dev_acquisition_stop(sdi); | |
241 | } | |
242 | } | |
243 | /* Anything else is either an error or a timeout, which is fine: | |
244 | * we were just going to send another transfer request anyway. */ | |
245 | ||
246 | if (sdi->status == SR_ST_ACTIVE) { | |
247 | /* Send the same request again. */ | |
248 | if ((ret = libusb_submit_transfer(transfer) != 0)) { | |
249 | sr_err("Unable to resubmit transfer: %s.", | |
250 | libusb_error_name(ret)); | |
251 | g_free(transfer->buffer); | |
252 | libusb_free_transfer(transfer); | |
253 | dev_acquisition_stop(sdi); | |
254 | } | |
255 | } else { | |
256 | /* This was the last transfer we're going to receive, so | |
257 | * clean up now. */ | |
258 | g_free(transfer->buffer); | |
259 | libusb_free_transfer(transfer); | |
260 | } | |
261 | } | |
262 | ||
263 | static int handle_events(int fd, int revents, void *cb_data) | |
264 | { | |
265 | struct dev_context *devc; | |
266 | struct drv_context *drvc; | |
267 | struct sr_dev_inst *sdi; | |
268 | struct sr_dev_driver *di; | |
269 | struct timeval tv; | |
270 | ||
271 | (void)fd; | |
272 | (void)revents; | |
273 | ||
274 | sdi = cb_data; | |
275 | devc = sdi->priv; | |
276 | di = sdi->driver; | |
277 | drvc = di->context; | |
278 | ||
279 | if (sr_sw_limits_check(&devc->limits)) | |
280 | dev_acquisition_stop(sdi); | |
281 | ||
282 | if (sdi->status == SR_ST_STOPPING) { | |
283 | usb_source_remove(sdi->session, drvc->sr_ctx); | |
284 | dev_close(sdi); | |
285 | std_session_send_df_end(sdi, LOG_PREFIX); | |
286 | } | |
287 | ||
288 | memset(&tv, 0, sizeof(struct timeval)); | |
289 | libusb_handle_events_timeout_completed(drvc->sr_ctx->libusb_ctx, &tv, | |
290 | NULL); | |
291 | ||
292 | return TRUE; | |
293 | } | |
294 | ||
295 | static int dev_acquisition_start(const struct sr_dev_inst *sdi) | |
296 | { | |
297 | struct sr_dev_driver *di = sdi->driver; | |
298 | struct drv_context *drvc = di->context; | |
299 | struct sr_usb_dev_inst *usb; | |
300 | struct libusb_transfer *transfer; | |
301 | int ret; | |
302 | unsigned char *buf; | |
303 | ||
304 | if (sdi->status != SR_ST_ACTIVE) | |
305 | return SR_ERR_DEV_CLOSED; | |
306 | ||
307 | usb = sdi->conn; | |
308 | ||
309 | std_session_send_df_header(sdi, LOG_PREFIX); | |
310 | ||
311 | usb_source_add(sdi->session, drvc->sr_ctx, 100, | |
312 | handle_events, (void *)sdi); | |
313 | ||
314 | buf = g_malloc(DMM_DATA_SIZE); | |
315 | transfer = libusb_alloc_transfer(0); | |
316 | /* Each transfer request gets 100ms to arrive before it's restarted. | |
317 | * The device only sends 1 transfer/second no matter how many | |
318 | * times you ask, but we want to keep step with the USB events | |
319 | * handling above. */ | |
320 | libusb_fill_interrupt_transfer(transfer, usb->devhdl, | |
321 | VICTOR_ENDPOINT, buf, DMM_DATA_SIZE, receive_transfer, | |
322 | (struct sr_dev_inst *)sdi, 100); | |
323 | if ((ret = libusb_submit_transfer(transfer) != 0)) { | |
324 | sr_err("Unable to submit transfer: %s.", libusb_error_name(ret)); | |
325 | libusb_free_transfer(transfer); | |
326 | g_free(buf); | |
327 | return SR_ERR; | |
328 | } | |
329 | ||
330 | return SR_OK; | |
331 | } | |
332 | ||
333 | static int dev_acquisition_stop(struct sr_dev_inst *sdi) | |
334 | { | |
335 | if (sdi->status != SR_ST_ACTIVE) { | |
336 | sr_err("Device not active, can't stop acquisition."); | |
337 | return SR_ERR; | |
338 | } | |
339 | ||
340 | sdi->status = SR_ST_STOPPING; | |
341 | ||
342 | return SR_OK; | |
343 | } | |
344 | ||
345 | SR_PRIV struct sr_dev_driver victor_dmm_driver_info = { | |
346 | .name = "victor-dmm", | |
347 | .longname = "Victor DMMs", | |
348 | .api_version = 1, | |
349 | .init = init, | |
350 | .cleanup = std_cleanup, | |
351 | .scan = scan, | |
352 | .dev_list = std_dev_list, | |
353 | .dev_clear = NULL, | |
354 | .config_get = config_get, | |
355 | .config_set = config_set, | |
356 | .config_list = config_list, | |
357 | .dev_open = dev_open, | |
358 | .dev_close = dev_close, | |
359 | .dev_acquisition_start = dev_acquisition_start, | |
360 | .dev_acquisition_stop = dev_acquisition_stop, | |
361 | .context = NULL, | |
362 | }; |