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1 | /* | |
2 | * This file is part of the libsigrok project. | |
3 | * | |
4 | * Copyright (C) 2013 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 "protocol.h" | |
21 | ||
22 | #include <string.h> | |
23 | ||
24 | static const uint32_t devopts[] = { | |
25 | SR_CONF_THERMOMETER, | |
26 | SR_CONF_CONTINUOUS, | |
27 | SR_CONF_LIMIT_SAMPLES | SR_CONF_GET | SR_CONF_SET, | |
28 | SR_CONF_DATA_SOURCE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST, | |
29 | }; | |
30 | ||
31 | static char *channels[] = { | |
32 | "T1", | |
33 | "T2", | |
34 | "T1-T2", | |
35 | }; | |
36 | ||
37 | static const char *data_sources[] = { | |
38 | "Live", | |
39 | "Memory", | |
40 | }; | |
41 | ||
42 | SR_PRIV struct sr_dev_driver uni_t_ut32x_driver_info; | |
43 | ||
44 | static int init(struct sr_dev_driver *di, struct sr_context *sr_ctx) | |
45 | { | |
46 | return std_init(sr_ctx, di, LOG_PREFIX); | |
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 sr_config *src; | |
55 | GSList *usb_devices, *devices, *l; | |
56 | int i; | |
57 | const char *conn; | |
58 | ||
59 | drvc = di->priv; | |
60 | drvc->instances = NULL; | |
61 | ||
62 | conn = NULL; | |
63 | for (l = options; l; l = l->next) { | |
64 | src = l->data; | |
65 | switch (src->key) { | |
66 | case SR_CONF_CONN: | |
67 | conn = g_variant_get_string(src->data, NULL); | |
68 | break; | |
69 | } | |
70 | } | |
71 | if (!conn) | |
72 | return NULL; | |
73 | ||
74 | devices = NULL; | |
75 | if ((usb_devices = sr_usb_find(drvc->sr_ctx->libusb_ctx, conn))) { | |
76 | /* We have a list of sr_usb_dev_inst matching the connection | |
77 | * string. Wrap them in sr_dev_inst and we're done. */ | |
78 | for (l = usb_devices; l; l = l->next) { | |
79 | sdi = g_malloc0(sizeof(struct sr_dev_inst)); | |
80 | sdi->status = SR_ST_INACTIVE; | |
81 | sdi->vendor = g_strdup(VENDOR); | |
82 | sdi->model = g_strdup(MODEL); | |
83 | sdi->driver = di; | |
84 | sdi->inst_type = SR_INST_USB; | |
85 | sdi->conn = l->data; | |
86 | for (i = 0; i < 3; i++) | |
87 | sr_channel_new(sdi, i, SR_CHANNEL_ANALOG, TRUE, channels[i]); | |
88 | devc = g_malloc0(sizeof(struct dev_context)); | |
89 | sdi->priv = devc; | |
90 | devc->limit_samples = 0; | |
91 | devc->data_source = DEFAULT_DATA_SOURCE; | |
92 | drvc->instances = g_slist_append(drvc->instances, sdi); | |
93 | devices = g_slist_append(devices, sdi); | |
94 | } | |
95 | g_slist_free(usb_devices); | |
96 | } else | |
97 | g_slist_free_full(usb_devices, g_free); | |
98 | ||
99 | return devices; | |
100 | } | |
101 | ||
102 | static GSList *dev_list(const struct sr_dev_driver *di) | |
103 | { | |
104 | return ((struct drv_context *)(di->priv))->instances; | |
105 | } | |
106 | ||
107 | static int dev_open(struct sr_dev_inst *sdi) | |
108 | { | |
109 | struct sr_dev_driver *di = sdi->driver; | |
110 | struct drv_context *drvc; | |
111 | struct sr_usb_dev_inst *usb; | |
112 | int ret; | |
113 | ||
114 | if (!(drvc = di->priv)) { | |
115 | sr_err("Driver was not initialized."); | |
116 | return SR_ERR; | |
117 | } | |
118 | ||
119 | usb = sdi->conn; | |
120 | ||
121 | if (sr_usb_open(drvc->sr_ctx->libusb_ctx, usb) != SR_OK) | |
122 | return SR_ERR; | |
123 | ||
124 | /* | |
125 | * The libusbx 1.0.9 darwin backend is broken: it can report a kernel | |
126 | * driver being active, but detaching it always returns an error. | |
127 | */ | |
128 | #if !defined(__APPLE__) | |
129 | if (libusb_kernel_driver_active(usb->devhdl, USB_INTERFACE) == 1) { | |
130 | if ((ret = libusb_detach_kernel_driver(usb->devhdl, USB_INTERFACE)) < 0) { | |
131 | sr_err("failed to detach kernel driver: %s", | |
132 | libusb_error_name(ret)); | |
133 | return SR_ERR; | |
134 | } | |
135 | } | |
136 | #endif | |
137 | ||
138 | if ((ret = libusb_set_configuration(usb->devhdl, USB_CONFIGURATION))) { | |
139 | sr_err("Failed to set configuration: %s.", libusb_error_name(ret)); | |
140 | return SR_ERR; | |
141 | } | |
142 | ||
143 | if ((ret = libusb_claim_interface(usb->devhdl, USB_INTERFACE))) { | |
144 | sr_err("Failed to claim interface: %s.", libusb_error_name(ret)); | |
145 | return SR_ERR; | |
146 | } | |
147 | sdi->status = SR_ST_ACTIVE; | |
148 | ||
149 | return ret; | |
150 | } | |
151 | ||
152 | static int dev_close(struct sr_dev_inst *sdi) | |
153 | { | |
154 | struct sr_dev_driver *di = sdi->driver; | |
155 | struct sr_usb_dev_inst *usb; | |
156 | ||
157 | if (!di->priv) { | |
158 | sr_err("Driver was not initialized."); | |
159 | return SR_ERR; | |
160 | } | |
161 | ||
162 | usb = sdi->conn; | |
163 | if (!usb->devhdl) | |
164 | /* Nothing to do. */ | |
165 | return SR_OK; | |
166 | ||
167 | libusb_release_interface(usb->devhdl, USB_INTERFACE); | |
168 | libusb_close(usb->devhdl); | |
169 | usb->devhdl = NULL; | |
170 | sdi->status = SR_ST_INACTIVE; | |
171 | ||
172 | return SR_OK; | |
173 | } | |
174 | ||
175 | static int cleanup(const struct sr_dev_driver *di) | |
176 | { | |
177 | int ret; | |
178 | struct drv_context *drvc; | |
179 | ||
180 | if (!(drvc = di->priv)) | |
181 | /* Can get called on an unused driver, doesn't matter. */ | |
182 | return SR_OK; | |
183 | ||
184 | ret = std_dev_clear(di, NULL); | |
185 | g_free(drvc); | |
186 | ||
187 | return ret; | |
188 | } | |
189 | ||
190 | static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi, | |
191 | const struct sr_channel_group *cg) | |
192 | { | |
193 | struct dev_context *devc; | |
194 | ||
195 | (void)cg; | |
196 | ||
197 | devc = sdi->priv; | |
198 | switch (key) { | |
199 | case SR_CONF_LIMIT_SAMPLES: | |
200 | *data = g_variant_new_uint64(devc->limit_samples); | |
201 | break; | |
202 | case SR_CONF_DATA_SOURCE: | |
203 | if (devc->data_source == DATA_SOURCE_LIVE) | |
204 | *data = g_variant_new_string("Live"); | |
205 | else | |
206 | *data = g_variant_new_string("Memory"); | |
207 | break; | |
208 | default: | |
209 | return SR_ERR_NA; | |
210 | } | |
211 | ||
212 | return SR_OK; | |
213 | } | |
214 | ||
215 | static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi, | |
216 | const struct sr_channel_group *cg) | |
217 | { | |
218 | struct sr_dev_driver *di = sdi->driver; | |
219 | struct dev_context *devc; | |
220 | int ret; | |
221 | const char *tmp_str; | |
222 | ||
223 | (void)cg; | |
224 | ||
225 | if (sdi->status != SR_ST_ACTIVE) | |
226 | return SR_ERR_DEV_CLOSED; | |
227 | ||
228 | if (!di->priv) { | |
229 | sr_err("Driver was not initialized."); | |
230 | return SR_ERR; | |
231 | } | |
232 | ||
233 | devc = sdi->priv; | |
234 | ret = SR_OK; | |
235 | switch (key) { | |
236 | case SR_CONF_LIMIT_SAMPLES: | |
237 | devc->limit_samples = g_variant_get_uint64(data); | |
238 | sr_dbg("Setting sample limit to %" PRIu64 ".", | |
239 | devc->limit_samples); | |
240 | break; | |
241 | case SR_CONF_DATA_SOURCE: | |
242 | tmp_str = g_variant_get_string(data, NULL); | |
243 | if (!strcmp(tmp_str, "Live")) | |
244 | devc->data_source = DATA_SOURCE_LIVE; | |
245 | else if (!strcmp(tmp_str, "Memory")) | |
246 | devc->data_source = DATA_SOURCE_MEMORY; | |
247 | else | |
248 | return SR_ERR; | |
249 | break; | |
250 | default: | |
251 | ret = SR_ERR_NA; | |
252 | } | |
253 | ||
254 | return ret; | |
255 | } | |
256 | ||
257 | static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi, | |
258 | const struct sr_channel_group *cg) | |
259 | { | |
260 | ||
261 | (void)sdi; | |
262 | (void)cg; | |
263 | ||
264 | switch (key) { | |
265 | case SR_CONF_DEVICE_OPTIONS: | |
266 | *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32, | |
267 | devopts, ARRAY_SIZE(devopts), sizeof(uint32_t)); | |
268 | break; | |
269 | case SR_CONF_DATA_SOURCE: | |
270 | *data = g_variant_new_strv(data_sources, ARRAY_SIZE(data_sources)); | |
271 | break; | |
272 | default: | |
273 | return SR_ERR_NA; | |
274 | } | |
275 | ||
276 | return SR_OK; | |
277 | } | |
278 | ||
279 | static int dev_acquisition_start(const struct sr_dev_inst *sdi, | |
280 | void *cb_data) | |
281 | { | |
282 | struct sr_dev_driver *di = sdi->driver; | |
283 | struct drv_context *drvc; | |
284 | struct dev_context *devc; | |
285 | struct sr_usb_dev_inst *usb; | |
286 | int len, ret; | |
287 | unsigned char cmd[2]; | |
288 | ||
289 | if (sdi->status != SR_ST_ACTIVE) | |
290 | return SR_ERR_DEV_CLOSED; | |
291 | ||
292 | drvc = di->priv; | |
293 | devc = sdi->priv; | |
294 | usb = sdi->conn; | |
295 | ||
296 | devc->cb_data = cb_data; | |
297 | devc->num_samples = 0; | |
298 | devc->packet_len = 0; | |
299 | ||
300 | /* Configure serial port parameters on USB-UART interface | |
301 | * chip inside the device (just baudrate 2400 actually). */ | |
302 | cmd[0] = 0x09; | |
303 | cmd[1] = 0x60; | |
304 | ret = libusb_control_transfer(usb->devhdl, 0x21, 0x09, 0x0300, 0x00, | |
305 | cmd, 2, 5); | |
306 | if (ret != 2) { | |
307 | sr_dbg("Failed to configure CH9325: %s", libusb_error_name(ret)); | |
308 | return SR_ERR; | |
309 | } | |
310 | ||
311 | /* Send header packet to the session bus. */ | |
312 | std_session_send_df_header(cb_data, LOG_PREFIX); | |
313 | ||
314 | if (!(devc->xfer = libusb_alloc_transfer(0))) | |
315 | return SR_ERR; | |
316 | ||
317 | /* Length of payload to follow. */ | |
318 | cmd[0] = 0x01; | |
319 | if (devc->data_source == DATA_SOURCE_LIVE) | |
320 | cmd[1] = CMD_GET_LIVE; | |
321 | else | |
322 | cmd[1] = CMD_GET_STORED; | |
323 | ||
324 | ret = libusb_bulk_transfer(usb->devhdl, EP_OUT, cmd, 2, &len, 5); | |
325 | if (ret != 0 || len != 2) { | |
326 | sr_dbg("Failed to start acquisition: %s", libusb_error_name(ret)); | |
327 | libusb_free_transfer(devc->xfer); | |
328 | return SR_ERR; | |
329 | } | |
330 | ||
331 | libusb_fill_bulk_transfer(devc->xfer, usb->devhdl, EP_IN, devc->buf, | |
332 | 8, uni_t_ut32x_receive_transfer, (void *)sdi, 15); | |
333 | if (libusb_submit_transfer(devc->xfer) != 0) { | |
334 | libusb_free_transfer(devc->xfer); | |
335 | return SR_ERR; | |
336 | } | |
337 | ||
338 | usb_source_add(sdi->session, drvc->sr_ctx, 10, | |
339 | uni_t_ut32x_handle_events, (void *)sdi); | |
340 | ||
341 | return SR_OK; | |
342 | } | |
343 | ||
344 | static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data) | |
345 | { | |
346 | ||
347 | (void)cb_data; | |
348 | ||
349 | if (sdi->status != SR_ST_ACTIVE) | |
350 | return SR_ERR_DEV_CLOSED; | |
351 | ||
352 | /* Signal USB transfer handler to clean up and stop. */ | |
353 | sdi->status = SR_ST_STOPPING; | |
354 | ||
355 | return SR_OK; | |
356 | } | |
357 | ||
358 | SR_PRIV struct sr_dev_driver uni_t_ut32x_driver_info = { | |
359 | .name = "uni-t-ut32x", | |
360 | .longname = "UNI-T UT32x", | |
361 | .api_version = 1, | |
362 | .init = init, | |
363 | .cleanup = cleanup, | |
364 | .scan = scan, | |
365 | .dev_list = dev_list, | |
366 | .dev_clear = NULL, | |
367 | .config_get = config_get, | |
368 | .config_set = config_set, | |
369 | .config_list = config_list, | |
370 | .dev_open = dev_open, | |
371 | .dev_close = dev_close, | |
372 | .dev_acquisition_start = dev_acquisition_start, | |
373 | .dev_acquisition_stop = dev_acquisition_stop, | |
374 | .priv = NULL, | |
375 | }; |