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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 scanopts[] = { | |
25 | SR_CONF_CONN, | |
26 | }; | |
27 | ||
28 | static const uint32_t drvopts[] = { | |
29 | SR_CONF_THERMOMETER, | |
30 | }; | |
31 | ||
32 | static const uint32_t devopts[] = { | |
33 | SR_CONF_CONTINUOUS, | |
34 | SR_CONF_LIMIT_SAMPLES | SR_CONF_GET | SR_CONF_SET, | |
35 | SR_CONF_DATA_SOURCE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST, | |
36 | }; | |
37 | ||
38 | static const char *channel_names[] = { | |
39 | "T1", "T2", "T1-T2", | |
40 | }; | |
41 | ||
42 | static const char *data_sources[] = { | |
43 | "Live", "Memory", | |
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->context; | |
57 | ||
58 | conn = NULL; | |
59 | for (l = options; l; l = l->next) { | |
60 | src = l->data; | |
61 | switch (src->key) { | |
62 | case SR_CONF_CONN: | |
63 | conn = g_variant_get_string(src->data, NULL); | |
64 | break; | |
65 | } | |
66 | } | |
67 | if (!conn) | |
68 | return NULL; | |
69 | ||
70 | devices = NULL; | |
71 | if ((usb_devices = sr_usb_find(drvc->sr_ctx->libusb_ctx, conn))) { | |
72 | /* We have a list of sr_usb_dev_inst matching the connection | |
73 | * string. Wrap them in sr_dev_inst and we're done. */ | |
74 | for (l = usb_devices; l; l = l->next) { | |
75 | sdi = g_malloc0(sizeof(struct sr_dev_inst)); | |
76 | sdi->status = SR_ST_INACTIVE; | |
77 | sdi->vendor = g_strdup("UNI-T"); | |
78 | sdi->model = g_strdup("UT32x"); | |
79 | sdi->inst_type = SR_INST_USB; | |
80 | sdi->conn = l->data; | |
81 | for (i = 0; i < ARRAY_SIZE(channel_names); i++) | |
82 | sr_channel_new(sdi, i, SR_CHANNEL_ANALOG, TRUE, | |
83 | channel_names[i]); | |
84 | devc = g_malloc0(sizeof(struct dev_context)); | |
85 | sdi->priv = devc; | |
86 | devc->limit_samples = 0; | |
87 | devc->data_source = DEFAULT_DATA_SOURCE; | |
88 | devices = g_slist_append(devices, sdi); | |
89 | } | |
90 | g_slist_free(usb_devices); | |
91 | } else | |
92 | g_slist_free_full(usb_devices, g_free); | |
93 | ||
94 | return std_scan_complete(di, devices); | |
95 | } | |
96 | ||
97 | static int dev_open(struct sr_dev_inst *sdi) | |
98 | { | |
99 | struct sr_dev_driver *di = sdi->driver; | |
100 | struct drv_context *drvc = di->context; | |
101 | struct sr_usb_dev_inst *usb; | |
102 | int ret; | |
103 | ||
104 | usb = sdi->conn; | |
105 | ||
106 | if (sr_usb_open(drvc->sr_ctx->libusb_ctx, usb) != SR_OK) | |
107 | return SR_ERR; | |
108 | ||
109 | /* | |
110 | * The libusb 1.0.9 Darwin backend is broken: it can report a kernel | |
111 | * driver being active, but detaching it always returns an error. | |
112 | */ | |
113 | #if !defined(__APPLE__) | |
114 | if (libusb_kernel_driver_active(usb->devhdl, USB_INTERFACE) == 1) { | |
115 | if ((ret = libusb_detach_kernel_driver(usb->devhdl, USB_INTERFACE)) < 0) { | |
116 | sr_err("failed to detach kernel driver: %s", | |
117 | libusb_error_name(ret)); | |
118 | return SR_ERR; | |
119 | } | |
120 | } | |
121 | #endif | |
122 | ||
123 | if ((ret = libusb_set_configuration(usb->devhdl, USB_CONFIGURATION))) { | |
124 | sr_err("Failed to set configuration: %s.", libusb_error_name(ret)); | |
125 | return SR_ERR; | |
126 | } | |
127 | ||
128 | if ((ret = libusb_claim_interface(usb->devhdl, USB_INTERFACE))) { | |
129 | sr_err("Failed to claim interface: %s.", libusb_error_name(ret)); | |
130 | return SR_ERR; | |
131 | } | |
132 | ||
133 | return SR_OK; | |
134 | } | |
135 | ||
136 | static int dev_close(struct sr_dev_inst *sdi) | |
137 | { | |
138 | struct sr_usb_dev_inst *usb; | |
139 | ||
140 | usb = sdi->conn; | |
141 | ||
142 | if (!usb->devhdl) | |
143 | return SR_ERR_BUG; | |
144 | ||
145 | libusb_release_interface(usb->devhdl, USB_INTERFACE); | |
146 | libusb_close(usb->devhdl); | |
147 | usb->devhdl = NULL; | |
148 | ||
149 | return SR_OK; | |
150 | } | |
151 | ||
152 | static int config_get(uint32_t key, GVariant **data, | |
153 | const struct sr_dev_inst *sdi, const struct sr_channel_group *cg) | |
154 | { | |
155 | struct dev_context *devc; | |
156 | ||
157 | (void)cg; | |
158 | ||
159 | devc = sdi->priv; | |
160 | switch (key) { | |
161 | case SR_CONF_LIMIT_SAMPLES: | |
162 | *data = g_variant_new_uint64(devc->limit_samples); | |
163 | break; | |
164 | case SR_CONF_DATA_SOURCE: | |
165 | if (devc->data_source == DATA_SOURCE_LIVE) | |
166 | *data = g_variant_new_string("Live"); | |
167 | else | |
168 | *data = g_variant_new_string("Memory"); | |
169 | break; | |
170 | default: | |
171 | return SR_ERR_NA; | |
172 | } | |
173 | ||
174 | return SR_OK; | |
175 | } | |
176 | ||
177 | static int config_set(uint32_t key, GVariant *data, | |
178 | const struct sr_dev_inst *sdi, const struct sr_channel_group *cg) | |
179 | { | |
180 | struct dev_context *devc; | |
181 | int idx; | |
182 | ||
183 | (void)cg; | |
184 | ||
185 | devc = sdi->priv; | |
186 | ||
187 | switch (key) { | |
188 | case SR_CONF_LIMIT_SAMPLES: | |
189 | devc->limit_samples = g_variant_get_uint64(data); | |
190 | break; | |
191 | case SR_CONF_DATA_SOURCE: | |
192 | if ((idx = std_str_idx(data, ARRAY_AND_SIZE(data_sources))) < 0) | |
193 | return SR_ERR_ARG; | |
194 | devc->data_source = idx; | |
195 | break; | |
196 | default: | |
197 | return SR_ERR_NA; | |
198 | } | |
199 | ||
200 | return SR_OK; | |
201 | } | |
202 | ||
203 | static int config_list(uint32_t key, GVariant **data, | |
204 | const struct sr_dev_inst *sdi, const struct sr_channel_group *cg) | |
205 | { | |
206 | switch (key) { | |
207 | case SR_CONF_SCAN_OPTIONS: | |
208 | case SR_CONF_DEVICE_OPTIONS: | |
209 | return STD_CONFIG_LIST(key, data, sdi, cg, scanopts, drvopts, devopts); | |
210 | case SR_CONF_DATA_SOURCE: | |
211 | *data = g_variant_new_strv(ARRAY_AND_SIZE(data_sources)); | |
212 | break; | |
213 | default: | |
214 | return SR_ERR_NA; | |
215 | } | |
216 | ||
217 | return SR_OK; | |
218 | } | |
219 | ||
220 | static int dev_acquisition_start(const struct sr_dev_inst *sdi) | |
221 | { | |
222 | struct sr_dev_driver *di = sdi->driver; | |
223 | struct drv_context *drvc; | |
224 | struct dev_context *devc; | |
225 | struct sr_usb_dev_inst *usb; | |
226 | int len, ret; | |
227 | unsigned char cmd[2]; | |
228 | ||
229 | drvc = di->context; | |
230 | devc = sdi->priv; | |
231 | usb = sdi->conn; | |
232 | ||
233 | devc->num_samples = 0; | |
234 | devc->packet_len = 0; | |
235 | ||
236 | /* Configure serial port parameters on USB-UART interface | |
237 | * chip inside the device (just baudrate 2400 actually). */ | |
238 | cmd[0] = 0x09; | |
239 | cmd[1] = 0x60; | |
240 | ret = libusb_control_transfer(usb->devhdl, 0x21, 0x09, 0x0300, 0x00, | |
241 | cmd, 2, 5); | |
242 | if (ret != 2) { | |
243 | sr_dbg("Failed to configure CH9325: %s", libusb_error_name(ret)); | |
244 | return SR_ERR; | |
245 | } | |
246 | ||
247 | std_session_send_df_header(sdi); | |
248 | ||
249 | if (!(devc->xfer = libusb_alloc_transfer(0))) | |
250 | return SR_ERR; | |
251 | ||
252 | /* Length of payload to follow. */ | |
253 | cmd[0] = 0x01; | |
254 | if (devc->data_source == DATA_SOURCE_LIVE) | |
255 | cmd[1] = CMD_GET_LIVE; | |
256 | else | |
257 | cmd[1] = CMD_GET_STORED; | |
258 | ||
259 | ret = libusb_bulk_transfer(usb->devhdl, EP_OUT, cmd, 2, &len, 5); | |
260 | if (ret != 0 || len != 2) { | |
261 | sr_dbg("Failed to start acquisition: %s", libusb_error_name(ret)); | |
262 | libusb_free_transfer(devc->xfer); | |
263 | return SR_ERR; | |
264 | } | |
265 | ||
266 | libusb_fill_bulk_transfer(devc->xfer, usb->devhdl, EP_IN, devc->buf, | |
267 | 8, uni_t_ut32x_receive_transfer, (void *)sdi, 15); | |
268 | if (libusb_submit_transfer(devc->xfer) != 0) { | |
269 | libusb_free_transfer(devc->xfer); | |
270 | return SR_ERR; | |
271 | } | |
272 | ||
273 | usb_source_add(sdi->session, drvc->sr_ctx, 10, | |
274 | uni_t_ut32x_handle_events, (void *)sdi); | |
275 | ||
276 | return SR_OK; | |
277 | } | |
278 | ||
279 | static int dev_acquisition_stop(struct sr_dev_inst *sdi) | |
280 | { | |
281 | /* Signal USB transfer handler to clean up and stop. */ | |
282 | sdi->status = SR_ST_STOPPING; | |
283 | ||
284 | return SR_OK; | |
285 | } | |
286 | ||
287 | static struct sr_dev_driver uni_t_ut32x_driver_info = { | |
288 | .name = "uni-t-ut32x", | |
289 | .longname = "UNI-T UT32x", | |
290 | .api_version = 1, | |
291 | .init = std_init, | |
292 | .cleanup = std_cleanup, | |
293 | .scan = scan, | |
294 | .dev_list = std_dev_list, | |
295 | .dev_clear = std_dev_clear, | |
296 | .config_get = config_get, | |
297 | .config_set = config_set, | |
298 | .config_list = config_list, | |
299 | .dev_open = dev_open, | |
300 | .dev_close = dev_close, | |
301 | .dev_acquisition_start = dev_acquisition_start, | |
302 | .dev_acquisition_stop = dev_acquisition_stop, | |
303 | .context = NULL, | |
304 | }; | |
305 | SR_REGISTER_DEV_DRIVER(uni_t_ut32x_driver_info); |