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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_INTERFACE 0 | |
32 | #define VICTOR_ENDPOINT (LIBUSB_ENDPOINT_IN | 1) | |
33 | ||
34 | static const uint32_t scanopts[] = { | |
35 | SR_CONF_CONN, | |
36 | }; | |
37 | ||
38 | static const uint32_t drvopts[] = { | |
39 | SR_CONF_MULTIMETER, | |
40 | }; | |
41 | ||
42 | static const uint32_t devopts[] = { | |
43 | SR_CONF_CONTINUOUS, | |
44 | SR_CONF_LIMIT_SAMPLES | SR_CONF_SET, | |
45 | SR_CONF_LIMIT_MSEC | SR_CONF_SET, | |
46 | SR_CONF_CONN | SR_CONF_GET, | |
47 | }; | |
48 | ||
49 | static GSList *scan(struct sr_dev_driver *di, GSList *options) | |
50 | { | |
51 | struct drv_context *drvc; | |
52 | struct dev_context *devc; | |
53 | struct sr_dev_inst *sdi; | |
54 | struct libusb_device_descriptor des; | |
55 | libusb_device **devlist; | |
56 | GSList *devices; | |
57 | int i; | |
58 | char connection_id[64]; | |
59 | ||
60 | (void)options; | |
61 | ||
62 | drvc = di->context; | |
63 | ||
64 | devices = NULL; | |
65 | libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist); | |
66 | for (i = 0; devlist[i]; i++) { | |
67 | libusb_get_device_descriptor(devlist[i], &des); | |
68 | ||
69 | if (des.idVendor != VICTOR_VID || des.idProduct != VICTOR_PID) | |
70 | continue; | |
71 | ||
72 | usb_get_port_path(devlist[i], connection_id, sizeof(connection_id)); | |
73 | ||
74 | sdi = g_malloc0(sizeof(struct sr_dev_inst)); | |
75 | sdi->status = SR_ST_INACTIVE; | |
76 | sdi->vendor = g_strdup("Victor"); | |
77 | sdi->connection_id = g_strdup(connection_id); | |
78 | devc = g_malloc0(sizeof(struct dev_context)); | |
79 | sr_sw_limits_init(&devc->limits); | |
80 | sdi->priv = devc; | |
81 | ||
82 | sr_channel_new(sdi, 0, SR_CHANNEL_ANALOG, TRUE, "P1"); | |
83 | sdi->conn = sr_usb_dev_inst_new(libusb_get_bus_number(devlist[i]), | |
84 | libusb_get_device_address(devlist[i]), NULL); | |
85 | sdi->inst_type = SR_INST_USB; | |
86 | ||
87 | devices = g_slist_append(devices, sdi); | |
88 | } | |
89 | libusb_free_device_list(devlist, 1); | |
90 | ||
91 | return std_scan_complete(di, devices); | |
92 | } | |
93 | ||
94 | static int dev_open(struct sr_dev_inst *sdi) | |
95 | { | |
96 | struct sr_dev_driver *di = sdi->driver; | |
97 | struct drv_context *drvc = di->context; | |
98 | struct sr_usb_dev_inst *usb; | |
99 | int ret; | |
100 | ||
101 | usb = sdi->conn; | |
102 | ||
103 | ret = sr_usb_open(drvc->sr_ctx->libusb_ctx, usb); | |
104 | if (ret != SR_OK) | |
105 | return ret; | |
106 | ||
107 | if (libusb_kernel_driver_active(usb->devhdl, 0) == 1) { | |
108 | if ((ret = libusb_detach_kernel_driver(usb->devhdl, 0)) < 0) { | |
109 | sr_err("Failed to detach kernel driver: %s.", | |
110 | libusb_error_name(ret)); | |
111 | return SR_ERR; | |
112 | } | |
113 | } | |
114 | ||
115 | if ((ret = libusb_claim_interface(usb->devhdl, | |
116 | VICTOR_INTERFACE))) { | |
117 | sr_err("Failed to claim interface: %s.", libusb_error_name(ret)); | |
118 | return SR_ERR; | |
119 | } | |
120 | ||
121 | return SR_OK; | |
122 | } | |
123 | ||
124 | static int dev_close(struct sr_dev_inst *sdi) | |
125 | { | |
126 | struct sr_usb_dev_inst *usb; | |
127 | ||
128 | usb = sdi->conn; | |
129 | ||
130 | if (!usb->devhdl) | |
131 | return SR_ERR_BUG; | |
132 | ||
133 | libusb_release_interface(usb->devhdl, VICTOR_INTERFACE); | |
134 | libusb_close(usb->devhdl); | |
135 | usb->devhdl = NULL; | |
136 | ||
137 | return SR_OK; | |
138 | } | |
139 | ||
140 | static int config_get(uint32_t key, GVariant **data, | |
141 | const struct sr_dev_inst *sdi, const struct sr_channel_group *cg) | |
142 | { | |
143 | struct dev_context *devc = sdi->priv; | |
144 | struct sr_usb_dev_inst *usb; | |
145 | ||
146 | (void)cg; | |
147 | ||
148 | switch (key) { | |
149 | case SR_CONF_CONN: | |
150 | if (!sdi || !sdi->conn) | |
151 | return SR_ERR_ARG; | |
152 | usb = sdi->conn; | |
153 | *data = g_variant_new_printf("%d.%d", usb->bus, usb->address); | |
154 | break; | |
155 | case SR_CONF_LIMIT_SAMPLES: | |
156 | case SR_CONF_LIMIT_MSEC: | |
157 | return sr_sw_limits_config_get(&devc->limits, key, data); | |
158 | default: | |
159 | return SR_ERR_NA; | |
160 | } | |
161 | ||
162 | return SR_OK; | |
163 | } | |
164 | ||
165 | static int config_set(uint32_t key, GVariant *data, | |
166 | const struct sr_dev_inst *sdi, const struct sr_channel_group *cg) | |
167 | { | |
168 | struct dev_context *devc; | |
169 | ||
170 | (void)cg; | |
171 | ||
172 | devc = sdi->priv; | |
173 | ||
174 | return sr_sw_limits_config_set(&devc->limits, key, data); | |
175 | } | |
176 | ||
177 | static int config_list(uint32_t key, GVariant **data, | |
178 | const struct sr_dev_inst *sdi, const struct sr_channel_group *cg) | |
179 | { | |
180 | return STD_CONFIG_LIST(key, data, sdi, cg, scanopts, drvopts, devopts); | |
181 | } | |
182 | ||
183 | static void LIBUSB_CALL receive_transfer(struct libusb_transfer *transfer) | |
184 | { | |
185 | struct dev_context *devc; | |
186 | struct sr_dev_inst *sdi; | |
187 | int ret; | |
188 | ||
189 | sdi = transfer->user_data; | |
190 | devc = sdi->priv; | |
191 | if (transfer->status == LIBUSB_TRANSFER_NO_DEVICE) { | |
192 | /* USB device was unplugged. */ | |
193 | sr_dev_acquisition_stop(sdi); | |
194 | } else if (transfer->status == LIBUSB_TRANSFER_COMPLETED) { | |
195 | sr_dbg("Got %d-byte packet.", transfer->actual_length); | |
196 | if (transfer->actual_length == DMM_DATA_SIZE) { | |
197 | victor_dmm_receive_data(sdi, transfer->buffer); | |
198 | if (sr_sw_limits_check(&devc->limits)) | |
199 | sr_dev_acquisition_stop(sdi); | |
200 | } | |
201 | } | |
202 | /* Anything else is either an error or a timeout, which is fine: | |
203 | * we were just going to send another transfer request anyway. */ | |
204 | ||
205 | if (sdi->status == SR_ST_ACTIVE) { | |
206 | /* Send the same request again. */ | |
207 | if ((ret = libusb_submit_transfer(transfer) != 0)) { | |
208 | sr_err("Unable to resubmit transfer: %s.", | |
209 | libusb_error_name(ret)); | |
210 | g_free(transfer->buffer); | |
211 | libusb_free_transfer(transfer); | |
212 | sr_dev_acquisition_stop(sdi); | |
213 | } | |
214 | } else { | |
215 | /* This was the last transfer we're going to receive, so | |
216 | * clean up now. */ | |
217 | g_free(transfer->buffer); | |
218 | libusb_free_transfer(transfer); | |
219 | } | |
220 | } | |
221 | ||
222 | static int handle_events(int fd, int revents, void *cb_data) | |
223 | { | |
224 | struct dev_context *devc; | |
225 | struct drv_context *drvc; | |
226 | struct sr_dev_inst *sdi; | |
227 | struct sr_dev_driver *di; | |
228 | struct timeval tv; | |
229 | ||
230 | (void)fd; | |
231 | (void)revents; | |
232 | ||
233 | sdi = cb_data; | |
234 | devc = sdi->priv; | |
235 | di = sdi->driver; | |
236 | drvc = di->context; | |
237 | ||
238 | if (sr_sw_limits_check(&devc->limits)) | |
239 | sr_dev_acquisition_stop(sdi); | |
240 | ||
241 | if (sdi->status == SR_ST_STOPPING) { | |
242 | usb_source_remove(sdi->session, drvc->sr_ctx); | |
243 | dev_close(sdi); | |
244 | std_session_send_df_end(sdi); | |
245 | } | |
246 | ||
247 | memset(&tv, 0, sizeof(struct timeval)); | |
248 | libusb_handle_events_timeout_completed(drvc->sr_ctx->libusb_ctx, &tv, | |
249 | NULL); | |
250 | ||
251 | return TRUE; | |
252 | } | |
253 | ||
254 | static int dev_acquisition_start(const struct sr_dev_inst *sdi) | |
255 | { | |
256 | struct sr_dev_driver *di = sdi->driver; | |
257 | struct drv_context *drvc = di->context; | |
258 | struct sr_usb_dev_inst *usb; | |
259 | struct libusb_transfer *transfer; | |
260 | int ret; | |
261 | unsigned char *buf; | |
262 | ||
263 | usb = sdi->conn; | |
264 | ||
265 | std_session_send_df_header(sdi); | |
266 | ||
267 | usb_source_add(sdi->session, drvc->sr_ctx, 100, | |
268 | handle_events, (void *)sdi); | |
269 | ||
270 | buf = g_malloc(DMM_DATA_SIZE); | |
271 | transfer = libusb_alloc_transfer(0); | |
272 | /* Each transfer request gets 100ms to arrive before it's restarted. | |
273 | * The device only sends 1 transfer/second no matter how many | |
274 | * times you ask, but we want to keep step with the USB events | |
275 | * handling above. */ | |
276 | libusb_fill_interrupt_transfer(transfer, usb->devhdl, | |
277 | VICTOR_ENDPOINT, buf, DMM_DATA_SIZE, receive_transfer, | |
278 | (struct sr_dev_inst *)sdi, 100); | |
279 | if ((ret = libusb_submit_transfer(transfer) != 0)) { | |
280 | sr_err("Unable to submit transfer: %s.", libusb_error_name(ret)); | |
281 | libusb_free_transfer(transfer); | |
282 | g_free(buf); | |
283 | return SR_ERR; | |
284 | } | |
285 | ||
286 | return SR_OK; | |
287 | } | |
288 | ||
289 | static int dev_acquisition_stop(struct sr_dev_inst *sdi) | |
290 | { | |
291 | sdi->status = SR_ST_STOPPING; | |
292 | ||
293 | return SR_OK; | |
294 | } | |
295 | ||
296 | static struct sr_dev_driver victor_dmm_driver_info = { | |
297 | .name = "victor-dmm", | |
298 | .longname = "Victor DMMs", | |
299 | .api_version = 1, | |
300 | .init = std_init, | |
301 | .cleanup = std_cleanup, | |
302 | .scan = scan, | |
303 | .dev_list = std_dev_list, | |
304 | .dev_clear = std_dev_clear, | |
305 | .config_get = config_get, | |
306 | .config_set = config_set, | |
307 | .config_list = config_list, | |
308 | .dev_open = dev_open, | |
309 | .dev_close = dev_close, | |
310 | .dev_acquisition_start = dev_acquisition_start, | |
311 | .dev_acquisition_stop = dev_acquisition_stop, | |
312 | .context = NULL, | |
313 | }; | |
314 | SR_REGISTER_DEV_DRIVER(victor_dmm_driver_info); |