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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 <config.h> | |
21 | #include <string.h> | |
22 | #include "protocol.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 const char *channel_names[] = { | |
32 | "T1", "T2", "T1-T2", | |
33 | }; | |
34 | ||
35 | static const char *data_sources[] = { | |
36 | "Live", | |
37 | "Memory", | |
38 | }; | |
39 | ||
40 | SR_PRIV struct sr_dev_driver uni_t_ut32x_driver_info; | |
41 | ||
42 | static int init(struct sr_dev_driver *di, struct sr_context *sr_ctx) | |
43 | { | |
44 | return std_init(sr_ctx, di, LOG_PREFIX); | |
45 | } | |
46 | ||
47 | static GSList *scan(struct sr_dev_driver *di, GSList *options) | |
48 | { | |
49 | struct drv_context *drvc; | |
50 | struct dev_context *devc; | |
51 | struct sr_dev_inst *sdi; | |
52 | struct sr_config *src; | |
53 | GSList *usb_devices, *devices, *l; | |
54 | unsigned int i; | |
55 | const char *conn; | |
56 | ||
57 | drvc = di->context; | |
58 | drvc->instances = NULL; | |
59 | ||
60 | conn = NULL; | |
61 | for (l = options; l; l = l->next) { | |
62 | src = l->data; | |
63 | switch (src->key) { | |
64 | case SR_CONF_CONN: | |
65 | conn = g_variant_get_string(src->data, NULL); | |
66 | break; | |
67 | } | |
68 | } | |
69 | if (!conn) | |
70 | return NULL; | |
71 | ||
72 | devices = NULL; | |
73 | if ((usb_devices = sr_usb_find(drvc->sr_ctx->libusb_ctx, conn))) { | |
74 | /* We have a list of sr_usb_dev_inst matching the connection | |
75 | * string. Wrap them in sr_dev_inst and we're done. */ | |
76 | for (l = usb_devices; l; l = l->next) { | |
77 | sdi = g_malloc0(sizeof(struct sr_dev_inst)); | |
78 | sdi->status = SR_ST_INACTIVE; | |
79 | sdi->vendor = g_strdup(VENDOR); | |
80 | sdi->model = g_strdup(MODEL); | |
81 | sdi->driver = di; | |
82 | sdi->inst_type = SR_INST_USB; | |
83 | sdi->conn = l->data; | |
84 | for (i = 0; i < ARRAY_SIZE(channel_names); i++) | |
85 | sr_channel_new(sdi, i, SR_CHANNEL_ANALOG, TRUE, | |
86 | channel_names[i]); | |
87 | devc = g_malloc0(sizeof(struct dev_context)); | |
88 | sdi->priv = devc; | |
89 | devc->limit_samples = 0; | |
90 | devc->data_source = DEFAULT_DATA_SOURCE; | |
91 | drvc->instances = g_slist_append(drvc->instances, sdi); | |
92 | devices = g_slist_append(devices, sdi); | |
93 | } | |
94 | g_slist_free(usb_devices); | |
95 | } else | |
96 | g_slist_free_full(usb_devices, g_free); | |
97 | ||
98 | return devices; | |
99 | } | |
100 | ||
101 | static GSList *dev_list(const struct sr_dev_driver *di) | |
102 | { | |
103 | return ((struct drv_context *)(di->context))->instances; | |
104 | } | |
105 | ||
106 | static int dev_open(struct sr_dev_inst *sdi) | |
107 | { | |
108 | struct sr_dev_driver *di = sdi->driver; | |
109 | struct drv_context *drvc; | |
110 | struct sr_usb_dev_inst *usb; | |
111 | int ret; | |
112 | ||
113 | if (!(drvc = di->context)) { | |
114 | sr_err("Driver was not initialized."); | |
115 | return SR_ERR; | |
116 | } | |
117 | ||
118 | usb = sdi->conn; | |
119 | ||
120 | if (sr_usb_open(drvc->sr_ctx->libusb_ctx, usb) != SR_OK) | |
121 | return SR_ERR; | |
122 | ||
123 | /* | |
124 | * The libusb 1.0.9 Darwin backend is broken: it can report a kernel | |
125 | * driver being active, but detaching it always returns an error. | |
126 | */ | |
127 | #if !defined(__APPLE__) | |
128 | if (libusb_kernel_driver_active(usb->devhdl, USB_INTERFACE) == 1) { | |
129 | if ((ret = libusb_detach_kernel_driver(usb->devhdl, USB_INTERFACE)) < 0) { | |
130 | sr_err("failed to detach kernel driver: %s", | |
131 | libusb_error_name(ret)); | |
132 | return SR_ERR; | |
133 | } | |
134 | } | |
135 | #endif | |
136 | ||
137 | if ((ret = libusb_set_configuration(usb->devhdl, USB_CONFIGURATION))) { | |
138 | sr_err("Failed to set configuration: %s.", libusb_error_name(ret)); | |
139 | return SR_ERR; | |
140 | } | |
141 | ||
142 | if ((ret = libusb_claim_interface(usb->devhdl, USB_INTERFACE))) { | |
143 | sr_err("Failed to claim interface: %s.", libusb_error_name(ret)); | |
144 | return SR_ERR; | |
145 | } | |
146 | sdi->status = SR_ST_ACTIVE; | |
147 | ||
148 | return ret; | |
149 | } | |
150 | ||
151 | static int dev_close(struct sr_dev_inst *sdi) | |
152 | { | |
153 | struct sr_dev_driver *di = sdi->driver; | |
154 | struct sr_usb_dev_inst *usb; | |
155 | ||
156 | if (!di->context) { | |
157 | sr_err("Driver was not initialized."); | |
158 | return SR_ERR; | |
159 | } | |
160 | ||
161 | usb = sdi->conn; | |
162 | if (!usb->devhdl) | |
163 | /* Nothing to do. */ | |
164 | return SR_OK; | |
165 | ||
166 | libusb_release_interface(usb->devhdl, USB_INTERFACE); | |
167 | libusb_close(usb->devhdl); | |
168 | usb->devhdl = NULL; | |
169 | sdi->status = SR_ST_INACTIVE; | |
170 | ||
171 | return SR_OK; | |
172 | } | |
173 | ||
174 | static int cleanup(const struct sr_dev_driver *di) | |
175 | { | |
176 | int ret; | |
177 | struct drv_context *drvc; | |
178 | ||
179 | if (!(drvc = di->context)) | |
180 | /* Can get called on an unused driver, doesn't matter. */ | |
181 | return SR_OK; | |
182 | ||
183 | ret = std_dev_clear(di, NULL); | |
184 | g_free(drvc); | |
185 | ||
186 | return ret; | |
187 | } | |
188 | ||
189 | static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi, | |
190 | const struct sr_channel_group *cg) | |
191 | { | |
192 | struct dev_context *devc; | |
193 | ||
194 | (void)cg; | |
195 | ||
196 | devc = sdi->priv; | |
197 | switch (key) { | |
198 | case SR_CONF_LIMIT_SAMPLES: | |
199 | *data = g_variant_new_uint64(devc->limit_samples); | |
200 | break; | |
201 | case SR_CONF_DATA_SOURCE: | |
202 | if (devc->data_source == DATA_SOURCE_LIVE) | |
203 | *data = g_variant_new_string("Live"); | |
204 | else | |
205 | *data = g_variant_new_string("Memory"); | |
206 | break; | |
207 | default: | |
208 | return SR_ERR_NA; | |
209 | } | |
210 | ||
211 | return SR_OK; | |
212 | } | |
213 | ||
214 | static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi, | |
215 | const struct sr_channel_group *cg) | |
216 | { | |
217 | struct sr_dev_driver *di = sdi->driver; | |
218 | struct dev_context *devc; | |
219 | const char *tmp_str; | |
220 | ||
221 | (void)cg; | |
222 | ||
223 | if (sdi->status != SR_ST_ACTIVE) | |
224 | return SR_ERR_DEV_CLOSED; | |
225 | ||
226 | if (!di->context) { | |
227 | sr_err("Driver was not initialized."); | |
228 | return SR_ERR; | |
229 | } | |
230 | ||
231 | devc = sdi->priv; | |
232 | ||
233 | switch (key) { | |
234 | case SR_CONF_LIMIT_SAMPLES: | |
235 | devc->limit_samples = g_variant_get_uint64(data); | |
236 | break; | |
237 | case SR_CONF_DATA_SOURCE: | |
238 | tmp_str = g_variant_get_string(data, NULL); | |
239 | if (!strcmp(tmp_str, "Live")) | |
240 | devc->data_source = DATA_SOURCE_LIVE; | |
241 | else if (!strcmp(tmp_str, "Memory")) | |
242 | devc->data_source = DATA_SOURCE_MEMORY; | |
243 | else | |
244 | return SR_ERR; | |
245 | break; | |
246 | default: | |
247 | return SR_ERR_NA; | |
248 | } | |
249 | ||
250 | return SR_OK; | |
251 | } | |
252 | ||
253 | static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi, | |
254 | const struct sr_channel_group *cg) | |
255 | { | |
256 | (void)sdi; | |
257 | (void)cg; | |
258 | ||
259 | switch (key) { | |
260 | case SR_CONF_DEVICE_OPTIONS: | |
261 | *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32, | |
262 | devopts, ARRAY_SIZE(devopts), sizeof(uint32_t)); | |
263 | break; | |
264 | case SR_CONF_DATA_SOURCE: | |
265 | *data = g_variant_new_strv(data_sources, ARRAY_SIZE(data_sources)); | |
266 | break; | |
267 | default: | |
268 | return SR_ERR_NA; | |
269 | } | |
270 | ||
271 | return SR_OK; | |
272 | } | |
273 | ||
274 | static int dev_acquisition_start(const struct sr_dev_inst *sdi, | |
275 | void *cb_data) | |
276 | { | |
277 | struct sr_dev_driver *di = sdi->driver; | |
278 | struct drv_context *drvc; | |
279 | struct dev_context *devc; | |
280 | struct sr_usb_dev_inst *usb; | |
281 | int len, ret; | |
282 | unsigned char cmd[2]; | |
283 | ||
284 | if (sdi->status != SR_ST_ACTIVE) | |
285 | return SR_ERR_DEV_CLOSED; | |
286 | ||
287 | drvc = di->context; | |
288 | devc = sdi->priv; | |
289 | usb = sdi->conn; | |
290 | ||
291 | devc->cb_data = cb_data; | |
292 | devc->num_samples = 0; | |
293 | devc->packet_len = 0; | |
294 | ||
295 | /* Configure serial port parameters on USB-UART interface | |
296 | * chip inside the device (just baudrate 2400 actually). */ | |
297 | cmd[0] = 0x09; | |
298 | cmd[1] = 0x60; | |
299 | ret = libusb_control_transfer(usb->devhdl, 0x21, 0x09, 0x0300, 0x00, | |
300 | cmd, 2, 5); | |
301 | if (ret != 2) { | |
302 | sr_dbg("Failed to configure CH9325: %s", libusb_error_name(ret)); | |
303 | return SR_ERR; | |
304 | } | |
305 | ||
306 | /* Send header packet to the session bus. */ | |
307 | std_session_send_df_header(cb_data, LOG_PREFIX); | |
308 | ||
309 | if (!(devc->xfer = libusb_alloc_transfer(0))) | |
310 | return SR_ERR; | |
311 | ||
312 | /* Length of payload to follow. */ | |
313 | cmd[0] = 0x01; | |
314 | if (devc->data_source == DATA_SOURCE_LIVE) | |
315 | cmd[1] = CMD_GET_LIVE; | |
316 | else | |
317 | cmd[1] = CMD_GET_STORED; | |
318 | ||
319 | ret = libusb_bulk_transfer(usb->devhdl, EP_OUT, cmd, 2, &len, 5); | |
320 | if (ret != 0 || len != 2) { | |
321 | sr_dbg("Failed to start acquisition: %s", libusb_error_name(ret)); | |
322 | libusb_free_transfer(devc->xfer); | |
323 | return SR_ERR; | |
324 | } | |
325 | ||
326 | libusb_fill_bulk_transfer(devc->xfer, usb->devhdl, EP_IN, devc->buf, | |
327 | 8, uni_t_ut32x_receive_transfer, (void *)sdi, 15); | |
328 | if (libusb_submit_transfer(devc->xfer) != 0) { | |
329 | libusb_free_transfer(devc->xfer); | |
330 | return SR_ERR; | |
331 | } | |
332 | ||
333 | usb_source_add(sdi->session, drvc->sr_ctx, 10, | |
334 | uni_t_ut32x_handle_events, (void *)sdi); | |
335 | ||
336 | return SR_OK; | |
337 | } | |
338 | ||
339 | static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data) | |
340 | { | |
341 | ||
342 | (void)cb_data; | |
343 | ||
344 | if (sdi->status != SR_ST_ACTIVE) | |
345 | return SR_ERR_DEV_CLOSED; | |
346 | ||
347 | /* Signal USB transfer handler to clean up and stop. */ | |
348 | sdi->status = SR_ST_STOPPING; | |
349 | ||
350 | return SR_OK; | |
351 | } | |
352 | ||
353 | SR_PRIV struct sr_dev_driver uni_t_ut32x_driver_info = { | |
354 | .name = "uni-t-ut32x", | |
355 | .longname = "UNI-T UT32x", | |
356 | .api_version = 1, | |
357 | .init = init, | |
358 | .cleanup = cleanup, | |
359 | .scan = scan, | |
360 | .dev_list = dev_list, | |
361 | .dev_clear = NULL, | |
362 | .config_get = config_get, | |
363 | .config_set = config_set, | |
364 | .config_list = config_list, | |
365 | .dev_open = dev_open, | |
366 | .dev_close = dev_close, | |
367 | .dev_acquisition_start = dev_acquisition_start, | |
368 | .dev_acquisition_stop = dev_acquisition_stop, | |
369 | .context = NULL, | |
370 | }; |