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063e7aef | 1 | /* |
50985c20 | 2 | * This file is part of the libsigrok project. |
063e7aef UH |
3 | * |
4 | * Copyright (C) 2013 Uwe Hermann <uwe@hermann-uwe.de> | |
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 2 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, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
19 | */ | |
20 | ||
2eb84c98 | 21 | /** @file |
04cb9157 MH |
22 | * Standard API helper functions. |
23 | * @internal | |
24 | */ | |
25 | ||
063e7aef | 26 | #include <glib.h> |
c1aae900 | 27 | #include <libsigrok/libsigrok.h> |
063e7aef | 28 | #include "libsigrok-internal.h" |
5a1afc09 | 29 | #include "scpi.h" |
063e7aef | 30 | |
3544f848 ML |
31 | #define LOG_PREFIX "std" |
32 | ||
063e7aef UH |
33 | /** |
34 | * Standard sr_driver_init() API helper. | |
35 | * | |
6078d2c9 | 36 | * This function can be used to simplify most driver's init() API callback. |
063e7aef UH |
37 | * |
38 | * It creates a new 'struct drv_context' (drvc), assigns sr_ctx to it, and | |
39 | * then 'drvc' is assigned to the 'struct sr_dev_driver' (di) that is passed. | |
40 | * | |
41 | * @param sr_ctx The libsigrok context to assign. | |
42 | * @param di The driver instance to use. | |
04cb9157 | 43 | * @param[in] prefix A driver-specific prefix string used for log messages. |
063e7aef | 44 | * |
91219afc | 45 | * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments. |
063e7aef | 46 | */ |
f6beaac5 UH |
47 | SR_PRIV int std_init(struct sr_context *sr_ctx, struct sr_dev_driver *di, |
48 | const char *prefix) | |
063e7aef UH |
49 | { |
50 | struct drv_context *drvc; | |
51 | ||
52 | if (!di) { | |
ac2926b3 | 53 | sr_err("%s: Invalid driver, cannot initialize.", prefix); |
063e7aef UH |
54 | return SR_ERR_ARG; |
55 | } | |
56 | ||
91219afc | 57 | drvc = g_malloc0(sizeof(struct drv_context)); |
063e7aef | 58 | drvc->sr_ctx = sr_ctx; |
c2523f22 | 59 | drvc->instances = NULL; |
41812aca | 60 | di->context = drvc; |
063e7aef UH |
61 | |
62 | return SR_OK; | |
63 | } | |
4afdfd46 UH |
64 | |
65 | /** | |
66 | * Standard API helper for sending an SR_DF_HEADER packet. | |
67 | * | |
68 | * This function can be used to simplify most driver's | |
6078d2c9 | 69 | * dev_acquisition_start() API callback. |
4afdfd46 UH |
70 | * |
71 | * @param sdi The device instance to use. | |
72 | * @param prefix A driver-specific prefix string used for log messages. | |
73 | * Must not be NULL. An empty string is allowed. | |
74 | * | |
75 | * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments, or | |
76 | * SR_ERR upon other errors. | |
77 | */ | |
78 | SR_PRIV int std_session_send_df_header(const struct sr_dev_inst *sdi, | |
79 | const char *prefix) | |
80 | { | |
81 | int ret; | |
82 | struct sr_datafeed_packet packet; | |
83 | struct sr_datafeed_header header; | |
84 | ||
85 | if (!prefix) { | |
86 | sr_err("Invalid prefix."); | |
87 | return SR_ERR_ARG; | |
88 | } | |
89 | ||
ac2926b3 | 90 | sr_dbg("%s: Starting acquisition.", prefix); |
4afdfd46 UH |
91 | |
92 | /* Send header packet to the session bus. */ | |
ac2926b3 | 93 | sr_dbg("%s: Sending SR_DF_HEADER packet.", prefix); |
4afdfd46 UH |
94 | packet.type = SR_DF_HEADER; |
95 | packet.payload = (uint8_t *)&header; | |
96 | header.feed_version = 1; | |
97 | gettimeofday(&header.starttime, NULL); | |
98 | ||
99 | if ((ret = sr_session_send(sdi, &packet)) < 0) { | |
ac2926b3 | 100 | sr_err("%s: Failed to send header packet: %d.", prefix, ret); |
4afdfd46 UH |
101 | return ret; |
102 | } | |
103 | ||
104 | return SR_OK; | |
105 | } | |
cd2f0fe2 | 106 | |
c4f2dfd0 UH |
107 | #ifdef HAVE_LIBSERIALPORT |
108 | ||
813aab69 | 109 | /** |
23dc6661 BV |
110 | * Standard serial driver dev_open() helper. |
111 | * | |
112 | * This function can be used to implement the dev_open() driver API | |
113 | * callback in drivers that use a serial port. The port is opened | |
6c592ece | 114 | * with the SERIAL_RDWR flag. |
23dc6661 BV |
115 | * |
116 | * If the open succeeded, the status field of the given sdi is set | |
117 | * to SR_ST_ACTIVE. | |
118 | * | |
119 | * @retval SR_OK Success. | |
120 | * @retval SR_ERR Serial port open failed. | |
121 | */ | |
122 | SR_PRIV int std_serial_dev_open(struct sr_dev_inst *sdi) | |
123 | { | |
124 | struct sr_serial_dev_inst *serial; | |
125 | ||
126 | serial = sdi->conn; | |
6c592ece | 127 | if (serial_open(serial, SERIAL_RDWR) != SR_OK) |
23dc6661 BV |
128 | return SR_ERR; |
129 | ||
130 | sdi->status = SR_ST_ACTIVE; | |
131 | ||
132 | return SR_OK; | |
133 | } | |
134 | ||
813aab69 | 135 | /** |
1e7134dc BV |
136 | * Standard serial driver dev_close() helper. |
137 | * | |
138 | * This function can be used to implement the dev_close() driver API | |
139 | * callback in drivers that use a serial port. | |
140 | * | |
141 | * After closing the port, the status field of the given sdi is set | |
142 | * to SR_ST_INACTIVE. | |
143 | * | |
144 | * @retval SR_OK Success. | |
145 | */ | |
146 | SR_PRIV int std_serial_dev_close(struct sr_dev_inst *sdi) | |
147 | { | |
148 | struct sr_serial_dev_inst *serial; | |
149 | ||
150 | serial = sdi->conn; | |
151 | if (serial && sdi->status == SR_ST_ACTIVE) { | |
152 | serial_close(serial); | |
153 | sdi->status = SR_ST_INACTIVE; | |
154 | } | |
155 | ||
156 | return SR_OK; | |
157 | } | |
158 | ||
813aab69 | 159 | /** |
cd2f0fe2 UH |
160 | * Standard sr_session_stop() API helper. |
161 | * | |
162 | * This function can be used to simplify most (serial port based) driver's | |
6078d2c9 | 163 | * dev_acquisition_stop() API callback. |
cd2f0fe2 UH |
164 | * |
165 | * @param sdi The device instance for which acquisition should stop. | |
166 | * Must not be NULL. | |
167 | * @param cb_data Opaque 'cb_data' pointer. Must not be NULL. | |
6078d2c9 | 168 | * @param dev_close_fn Function pointer to the driver's dev_close(). |
cd2f0fe2 UH |
169 | * Must not be NULL. |
170 | * @param serial The serial device instance (struct serial_dev_inst *). | |
171 | * Must not be NULL. | |
813aab69 | 172 | * @param[in] prefix A driver-specific prefix string used for log messages. |
cd2f0fe2 UH |
173 | * Must not be NULL. An empty string is allowed. |
174 | * | |
1477a9a6 MH |
175 | * @retval SR_OK Success. |
176 | * @retval SR_ERR_ARG Invalid arguments. | |
177 | * @retval SR_ERR_DEV_CLOSED Device is closed. | |
178 | * @retval SR_ERR Other errors. | |
cd2f0fe2 | 179 | */ |
d43b0908 | 180 | SR_PRIV int std_serial_dev_acquisition_stop(struct sr_dev_inst *sdi, |
144f6660 | 181 | void *cb_data, dev_close_callback dev_close_fn, |
cd2f0fe2 UH |
182 | struct sr_serial_dev_inst *serial, const char *prefix) |
183 | { | |
184 | int ret; | |
185 | struct sr_datafeed_packet packet; | |
186 | ||
187 | if (!prefix) { | |
188 | sr_err("Invalid prefix."); | |
189 | return SR_ERR_ARG; | |
190 | } | |
191 | ||
192 | if (sdi->status != SR_ST_ACTIVE) { | |
ac2926b3 | 193 | sr_err("%s: Device inactive, can't stop acquisition.", prefix); |
1477a9a6 | 194 | return SR_ERR_DEV_CLOSED; |
cd2f0fe2 UH |
195 | } |
196 | ||
ac2926b3 | 197 | sr_dbg("%s: Stopping acquisition.", prefix); |
cd2f0fe2 | 198 | |
102f1239 | 199 | if ((ret = serial_source_remove(sdi->session, serial)) < 0) { |
ac2926b3 | 200 | sr_err("%s: Failed to remove source: %d.", prefix, ret); |
cd2f0fe2 UH |
201 | return ret; |
202 | } | |
203 | ||
6078d2c9 | 204 | if ((ret = dev_close_fn(sdi)) < 0) { |
ac2926b3 | 205 | sr_err("%s: Failed to close device: %d.", prefix, ret); |
cd2f0fe2 UH |
206 | return ret; |
207 | } | |
208 | ||
209 | /* Send SR_DF_END packet to the session bus. */ | |
ac2926b3 | 210 | sr_dbg("%s: Sending SR_DF_END packet.", prefix); |
cd2f0fe2 UH |
211 | packet.type = SR_DF_END; |
212 | packet.payload = NULL; | |
213 | if ((ret = sr_session_send(cb_data, &packet)) < 0) { | |
ac2926b3 | 214 | sr_err("%s: Failed to send SR_DF_END packet: %d.", prefix, ret); |
cd2f0fe2 UH |
215 | return ret; |
216 | } | |
217 | ||
218 | return SR_OK; | |
219 | } | |
49f00e13 | 220 | |
c4f2dfd0 UH |
221 | #endif |
222 | ||
813aab69 | 223 | /** |
49f00e13 BV |
224 | * Standard driver dev_clear() helper. |
225 | * | |
813aab69 MH |
226 | * Clear driver, this means, close all instances. |
227 | * | |
49f00e13 BV |
228 | * This function can be used to implement the dev_clear() driver API |
229 | * callback. dev_close() is called before every sr_dev_inst is cleared. | |
230 | * | |
231 | * The only limitation is driver-specific device contexts (sdi->priv). | |
232 | * These are freed, but any dynamic allocation within structs stored | |
233 | * there cannot be freed. | |
234 | * | |
235 | * @param driver The driver which will have its instances released. | |
12a33563 BV |
236 | * @param clear_private If not NULL, this points to a function called |
237 | * with sdi->priv as argument. The function can then clear any device | |
238 | * instance-specific resources kept there. It must also clear the struct | |
239 | * pointed to by sdi->priv. | |
49f00e13 BV |
240 | * |
241 | * @return SR_OK on success. | |
242 | */ | |
ae5859ff | 243 | SR_PRIV int std_dev_clear(const struct sr_dev_driver *driver, |
144f6660 | 244 | std_dev_clear_callback clear_private) |
49f00e13 | 245 | { |
49f00e13 | 246 | struct drv_context *drvc; |
12a33563 | 247 | struct sr_dev_inst *sdi; |
7aebe22d | 248 | GSList *l; |
49f00e13 BV |
249 | int ret; |
250 | ||
41812aca | 251 | if (!(drvc = driver->context)) |
3a277f3b BV |
252 | /* Driver was never initialized, nothing to do. */ |
253 | return SR_OK; | |
254 | ||
49f00e13 BV |
255 | ret = SR_OK; |
256 | for (l = drvc->instances; l; l = l->next) { | |
49f00e13 BV |
257 | if (!(sdi = l->data)) { |
258 | ret = SR_ERR_BUG; | |
259 | continue; | |
260 | } | |
49f00e13 BV |
261 | if (driver->dev_close) |
262 | driver->dev_close(sdi); | |
263 | ||
264 | if (sdi->conn) { | |
45357ce6 | 265 | #ifdef HAVE_LIBSERIALPORT |
c4f2dfd0 | 266 | if (sdi->inst_type == SR_INST_SERIAL) |
12a33563 | 267 | sr_serial_dev_inst_free(sdi->conn); |
c4f2dfd0 | 268 | #endif |
45357ce6 | 269 | #ifdef HAVE_LIBUSB_1_0 |
c4f2dfd0 | 270 | if (sdi->inst_type == SR_INST_USB) |
49f00e13 | 271 | sr_usb_dev_inst_free(sdi->conn); |
a0c7e23a | 272 | #endif |
23f43dff ML |
273 | if (sdi->inst_type == SR_INST_SCPI) |
274 | sr_scpi_free(sdi->conn); | |
daa39012 AJ |
275 | if (sdi->inst_type == SR_INST_MODBUS) |
276 | sr_modbus_free(sdi->conn); | |
49f00e13 | 277 | } |
ae5859ff | 278 | if (clear_private) |
886413b6 BV |
279 | /* The helper function is responsible for freeing |
280 | * its own sdi->priv! */ | |
ae5859ff | 281 | clear_private(sdi->priv); |
12a33563 BV |
282 | else |
283 | g_free(sdi->priv); | |
886413b6 | 284 | |
49f00e13 BV |
285 | sr_dev_inst_free(sdi); |
286 | } | |
287 | ||
288 | g_slist_free(drvc->instances); | |
289 | drvc->instances = NULL; | |
290 | ||
291 | return ret; | |
292 | } |