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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 <string.h> | |
21 | #include "protocol.h" | |
22 | ||
23 | static const uint32_t devopts[] = { | |
24 | SR_CONF_THERMOMETER, | |
25 | SR_CONF_CONTINUOUS, | |
26 | SR_CONF_LIMIT_SAMPLES | SR_CONF_GET | SR_CONF_SET, | |
27 | SR_CONF_DATA_SOURCE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST, | |
28 | }; | |
29 | ||
30 | static const char *channel_names[] = { | |
31 | "T1", "T2", "T1-T2", | |
32 | }; | |
33 | ||
34 | static const char *data_sources[] = { | |
35 | "Live", | |
36 | "Memory", | |
37 | }; | |
38 | ||
39 | SR_PRIV struct sr_dev_driver uni_t_ut32x_driver_info; | |
40 | ||
41 | static int init(struct sr_dev_driver *di, struct sr_context *sr_ctx) | |
42 | { | |
43 | return std_init(sr_ctx, di, LOG_PREFIX); | |
44 | } | |
45 | ||
46 | static GSList *scan(struct sr_dev_driver *di, GSList *options) | |
47 | { | |
48 | struct drv_context *drvc; | |
49 | struct dev_context *devc; | |
50 | struct sr_dev_inst *sdi; | |
51 | struct sr_config *src; | |
52 | GSList *usb_devices, *devices, *l; | |
53 | unsigned int i; | |
54 | const char *conn; | |
55 | ||
56 | drvc = di->priv; | |
57 | drvc->instances = NULL; | |
58 | ||
59 | conn = NULL; | |
60 | for (l = options; l; l = l->next) { | |
61 | src = l->data; | |
62 | switch (src->key) { | |
63 | case SR_CONF_CONN: | |
64 | conn = g_variant_get_string(src->data, NULL); | |
65 | break; | |
66 | } | |
67 | } | |
68 | if (!conn) | |
69 | return NULL; | |
70 | ||
71 | devices = NULL; | |
72 | if ((usb_devices = sr_usb_find(drvc->sr_ctx->libusb_ctx, conn))) { | |
73 | /* We have a list of sr_usb_dev_inst matching the connection | |
74 | * string. Wrap them in sr_dev_inst and we're done. */ | |
75 | for (l = usb_devices; l; l = l->next) { | |
76 | sdi = g_malloc0(sizeof(struct sr_dev_inst)); | |
77 | sdi->status = SR_ST_INACTIVE; | |
78 | sdi->vendor = g_strdup(VENDOR); | |
79 | sdi->model = g_strdup(MODEL); | |
80 | sdi->driver = di; | |
81 | sdi->inst_type = SR_INST_USB; | |
82 | sdi->conn = l->data; | |
83 | for (i = 0; i < ARRAY_SIZE(channel_names); i++) | |
84 | sr_channel_new(sdi, i, SR_CHANNEL_ANALOG, TRUE, | |
85 | channel_names[i]); | |
86 | devc = g_malloc0(sizeof(struct dev_context)); | |
87 | sdi->priv = devc; | |
88 | devc->limit_samples = 0; | |
89 | devc->data_source = DEFAULT_DATA_SOURCE; | |
90 | drvc->instances = g_slist_append(drvc->instances, sdi); | |
91 | devices = g_slist_append(devices, sdi); | |
92 | } | |
93 | g_slist_free(usb_devices); | |
94 | } else | |
95 | g_slist_free_full(usb_devices, g_free); | |
96 | ||
97 | return devices; | |
98 | } | |
99 | ||
100 | static GSList *dev_list(const struct sr_dev_driver *di) | |
101 | { | |
102 | return ((struct drv_context *)(di->priv))->instances; | |
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; | |
109 | struct sr_usb_dev_inst *usb; | |
110 | int ret; | |
111 | ||
112 | if (!(drvc = di->priv)) { | |
113 | sr_err("Driver was not initialized."); | |
114 | return SR_ERR; | |
115 | } | |
116 | ||
117 | usb = sdi->conn; | |
118 | ||
119 | if (sr_usb_open(drvc->sr_ctx->libusb_ctx, usb) != SR_OK) | |
120 | return SR_ERR; | |
121 | ||
122 | /* | |
123 | * The libusb 1.0.9 Darwin backend is broken: it can report a kernel | |
124 | * driver being active, but detaching it always returns an error. | |
125 | */ | |
126 | #if !defined(__APPLE__) | |
127 | if (libusb_kernel_driver_active(usb->devhdl, USB_INTERFACE) == 1) { | |
128 | if ((ret = libusb_detach_kernel_driver(usb->devhdl, USB_INTERFACE)) < 0) { | |
129 | sr_err("failed to detach kernel driver: %s", | |
130 | libusb_error_name(ret)); | |
131 | return SR_ERR; | |
132 | } | |
133 | } | |
134 | #endif | |
135 | ||
136 | if ((ret = libusb_set_configuration(usb->devhdl, USB_CONFIGURATION))) { | |
137 | sr_err("Failed to set configuration: %s.", libusb_error_name(ret)); | |
138 | return SR_ERR; | |
139 | } | |
140 | ||
141 | if ((ret = libusb_claim_interface(usb->devhdl, USB_INTERFACE))) { | |
142 | sr_err("Failed to claim interface: %s.", libusb_error_name(ret)); | |
143 | return SR_ERR; | |
144 | } | |
145 | sdi->status = SR_ST_ACTIVE; | |
146 | ||
147 | return ret; | |
148 | } | |
149 | ||
150 | static int dev_close(struct sr_dev_inst *sdi) | |
151 | { | |
152 | struct sr_dev_driver *di = sdi->driver; | |
153 | struct sr_usb_dev_inst *usb; | |
154 | ||
155 | if (!di->priv) { | |
156 | sr_err("Driver was not initialized."); | |
157 | return SR_ERR; | |
158 | } | |
159 | ||
160 | usb = sdi->conn; | |
161 | if (!usb->devhdl) | |
162 | /* Nothing to do. */ | |
163 | return SR_OK; | |
164 | ||
165 | libusb_release_interface(usb->devhdl, USB_INTERFACE); | |
166 | libusb_close(usb->devhdl); | |
167 | usb->devhdl = NULL; | |
168 | sdi->status = SR_ST_INACTIVE; | |
169 | ||
170 | return SR_OK; | |
171 | } | |
172 | ||
173 | static int cleanup(const struct sr_dev_driver *di) | |
174 | { | |
175 | int ret; | |
176 | struct drv_context *drvc; | |
177 | ||
178 | if (!(drvc = di->priv)) | |
179 | /* Can get called on an unused driver, doesn't matter. */ | |
180 | return SR_OK; | |
181 | ||
182 | ret = std_dev_clear(di, NULL); | |
183 | g_free(drvc); | |
184 | ||
185 | return ret; | |
186 | } | |
187 | ||
188 | static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi, | |
189 | const struct sr_channel_group *cg) | |
190 | { | |
191 | struct dev_context *devc; | |
192 | ||
193 | (void)cg; | |
194 | ||
195 | devc = sdi->priv; | |
196 | switch (key) { | |
197 | case SR_CONF_LIMIT_SAMPLES: | |
198 | *data = g_variant_new_uint64(devc->limit_samples); | |
199 | break; | |
200 | case SR_CONF_DATA_SOURCE: | |
201 | if (devc->data_source == DATA_SOURCE_LIVE) | |
202 | *data = g_variant_new_string("Live"); | |
203 | else | |
204 | *data = g_variant_new_string("Memory"); | |
205 | break; | |
206 | default: | |
207 | return SR_ERR_NA; | |
208 | } | |
209 | ||
210 | return SR_OK; | |
211 | } | |
212 | ||
213 | static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi, | |
214 | const struct sr_channel_group *cg) | |
215 | { | |
216 | struct sr_dev_driver *di = sdi->driver; | |
217 | struct dev_context *devc; | |
218 | const char *tmp_str; | |
219 | ||
220 | (void)cg; | |
221 | ||
222 | if (sdi->status != SR_ST_ACTIVE) | |
223 | return SR_ERR_DEV_CLOSED; | |
224 | ||
225 | if (!di->priv) { | |
226 | sr_err("Driver was not initialized."); | |
227 | return SR_ERR; | |
228 | } | |
229 | ||
230 | devc = sdi->priv; | |
231 | ||
232 | switch (key) { | |
233 | case SR_CONF_LIMIT_SAMPLES: | |
234 | devc->limit_samples = g_variant_get_uint64(data); | |
235 | break; | |
236 | case SR_CONF_DATA_SOURCE: | |
237 | tmp_str = g_variant_get_string(data, NULL); | |
238 | if (!strcmp(tmp_str, "Live")) | |
239 | devc->data_source = DATA_SOURCE_LIVE; | |
240 | else if (!strcmp(tmp_str, "Memory")) | |
241 | devc->data_source = DATA_SOURCE_MEMORY; | |
242 | else | |
243 | return SR_ERR; | |
244 | break; | |
245 | default: | |
246 | return SR_ERR_NA; | |
247 | } | |
248 | ||
249 | return SR_OK; | |
250 | } | |
251 | ||
252 | static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi, | |
253 | const struct sr_channel_group *cg) | |
254 | { | |
255 | (void)sdi; | |
256 | (void)cg; | |
257 | ||
258 | switch (key) { | |
259 | case SR_CONF_DEVICE_OPTIONS: | |
260 | *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32, | |
261 | devopts, ARRAY_SIZE(devopts), sizeof(uint32_t)); | |
262 | break; | |
263 | case SR_CONF_DATA_SOURCE: | |
264 | *data = g_variant_new_strv(data_sources, ARRAY_SIZE(data_sources)); | |
265 | break; | |
266 | default: | |
267 | return SR_ERR_NA; | |
268 | } | |
269 | ||
270 | return SR_OK; | |
271 | } | |
272 | ||
273 | static int dev_acquisition_start(const struct sr_dev_inst *sdi, | |
274 | void *cb_data) | |
275 | { | |
276 | struct sr_dev_driver *di = sdi->driver; | |
277 | struct drv_context *drvc; | |
278 | struct dev_context *devc; | |
279 | struct sr_usb_dev_inst *usb; | |
280 | int len, ret; | |
281 | unsigned char cmd[2]; | |
282 | ||
283 | if (sdi->status != SR_ST_ACTIVE) | |
284 | return SR_ERR_DEV_CLOSED; | |
285 | ||
286 | drvc = di->priv; | |
287 | devc = sdi->priv; | |
288 | usb = sdi->conn; | |
289 | ||
290 | devc->cb_data = cb_data; | |
291 | devc->num_samples = 0; | |
292 | devc->packet_len = 0; | |
293 | ||
294 | /* Configure serial port parameters on USB-UART interface | |
295 | * chip inside the device (just baudrate 2400 actually). */ | |
296 | cmd[0] = 0x09; | |
297 | cmd[1] = 0x60; | |
298 | ret = libusb_control_transfer(usb->devhdl, 0x21, 0x09, 0x0300, 0x00, | |
299 | cmd, 2, 5); | |
300 | if (ret != 2) { | |
301 | sr_dbg("Failed to configure CH9325: %s", libusb_error_name(ret)); | |
302 | return SR_ERR; | |
303 | } | |
304 | ||
305 | /* Send header packet to the session bus. */ | |
306 | std_session_send_df_header(cb_data, LOG_PREFIX); | |
307 | ||
308 | if (!(devc->xfer = libusb_alloc_transfer(0))) | |
309 | return SR_ERR; | |
310 | ||
311 | /* Length of payload to follow. */ | |
312 | cmd[0] = 0x01; | |
313 | if (devc->data_source == DATA_SOURCE_LIVE) | |
314 | cmd[1] = CMD_GET_LIVE; | |
315 | else | |
316 | cmd[1] = CMD_GET_STORED; | |
317 | ||
318 | ret = libusb_bulk_transfer(usb->devhdl, EP_OUT, cmd, 2, &len, 5); | |
319 | if (ret != 0 || len != 2) { | |
320 | sr_dbg("Failed to start acquisition: %s", libusb_error_name(ret)); | |
321 | libusb_free_transfer(devc->xfer); | |
322 | return SR_ERR; | |
323 | } | |
324 | ||
325 | libusb_fill_bulk_transfer(devc->xfer, usb->devhdl, EP_IN, devc->buf, | |
326 | 8, uni_t_ut32x_receive_transfer, (void *)sdi, 15); | |
327 | if (libusb_submit_transfer(devc->xfer) != 0) { | |
328 | libusb_free_transfer(devc->xfer); | |
329 | return SR_ERR; | |
330 | } | |
331 | ||
332 | usb_source_add(sdi->session, drvc->sr_ctx, 10, | |
333 | uni_t_ut32x_handle_events, (void *)sdi); | |
334 | ||
335 | return SR_OK; | |
336 | } | |
337 | ||
338 | static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data) | |
339 | { | |
340 | ||
341 | (void)cb_data; | |
342 | ||
343 | if (sdi->status != SR_ST_ACTIVE) | |
344 | return SR_ERR_DEV_CLOSED; | |
345 | ||
346 | /* Signal USB transfer handler to clean up and stop. */ | |
347 | sdi->status = SR_ST_STOPPING; | |
348 | ||
349 | return SR_OK; | |
350 | } | |
351 | ||
352 | SR_PRIV struct sr_dev_driver uni_t_ut32x_driver_info = { | |
353 | .name = "uni-t-ut32x", | |
354 | .longname = "UNI-T UT32x", | |
355 | .api_version = 1, | |
356 | .init = init, | |
357 | .cleanup = cleanup, | |
358 | .scan = scan, | |
359 | .dev_list = dev_list, | |
360 | .dev_clear = NULL, | |
361 | .config_get = config_get, | |
362 | .config_set = config_set, | |
363 | .config_list = config_list, | |
364 | .dev_open = dev_open, | |
365 | .dev_close = dev_close, | |
366 | .dev_acquisition_start = dev_acquisition_start, | |
367 | .dev_acquisition_stop = dev_acquisition_stop, | |
368 | .priv = NULL, | |
369 | }; |