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1 | /* | |
2 | * This file is part of the libsigrok project. | |
3 | * | |
4 | * Copyright (C) 2014-2017 Kumar Abhishek <abhishek@theembeddedkitchen.net> | |
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 "protocol.h" | |
22 | #include "beaglelogic.h" | |
23 | ||
24 | static const uint32_t scanopts[] = { | |
25 | SR_CONF_CONN, | |
26 | SR_CONF_NUM_LOGIC_CHANNELS, | |
27 | }; | |
28 | ||
29 | static const uint32_t drvopts[] = { | |
30 | SR_CONF_LOGIC_ANALYZER, | |
31 | }; | |
32 | ||
33 | static const uint32_t devopts[] = { | |
34 | SR_CONF_CONTINUOUS, | |
35 | SR_CONF_LIMIT_SAMPLES | SR_CONF_GET | SR_CONF_SET, | |
36 | SR_CONF_SAMPLERATE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST, | |
37 | SR_CONF_TRIGGER_MATCH | SR_CONF_LIST, | |
38 | SR_CONF_CAPTURE_RATIO | SR_CONF_GET | SR_CONF_SET, | |
39 | SR_CONF_NUM_LOGIC_CHANNELS | SR_CONF_GET, | |
40 | }; | |
41 | ||
42 | static const int32_t trigger_matches[] = { | |
43 | SR_TRIGGER_ZERO, | |
44 | SR_TRIGGER_ONE, | |
45 | SR_TRIGGER_RISING, | |
46 | SR_TRIGGER_FALLING, | |
47 | SR_TRIGGER_EDGE, | |
48 | }; | |
49 | ||
50 | SR_PRIV const char *channel_names[] = { | |
51 | "P8_45", "P8_46", "P8_43", "P8_44", "P8_41", "P8_42", "P8_39", | |
52 | "P8_40", "P8_27", "P8_29", "P8_28", "P8_30", "P8_21", "P8_20", | |
53 | }; | |
54 | ||
55 | /* Possible sample rates : 10 Hz to 100 MHz = (100 / x) MHz */ | |
56 | static const uint64_t samplerates[] = { | |
57 | SR_HZ(10), | |
58 | SR_MHZ(100), | |
59 | SR_HZ(1), | |
60 | }; | |
61 | ||
62 | static GSList *scan(struct sr_dev_driver *di, GSList *options) | |
63 | { | |
64 | GSList *l; | |
65 | struct sr_config *src; | |
66 | struct sr_dev_inst *sdi; | |
67 | struct dev_context *devc; | |
68 | const char *conn; | |
69 | gchar **params; | |
70 | int i, maxch; | |
71 | ||
72 | maxch = NUM_CHANNELS; | |
73 | conn = NULL; | |
74 | for (l = options; l; l = l->next) { | |
75 | src = l->data; | |
76 | if (src->key == SR_CONF_NUM_LOGIC_CHANNELS) | |
77 | maxch = g_variant_get_int32(src->data); | |
78 | if (src->key == SR_CONF_CONN) | |
79 | conn = g_variant_get_string(src->data, NULL); | |
80 | } | |
81 | ||
82 | /* Probe for /dev/beaglelogic if not connecting via TCP */ | |
83 | if (!conn) { | |
84 | params = NULL; | |
85 | if (!g_file_test(BEAGLELOGIC_DEV_NODE, G_FILE_TEST_EXISTS)) | |
86 | return NULL; | |
87 | } else { | |
88 | params = g_strsplit(conn, "/", 0); | |
89 | if (!params || !params[1] || !params[2]) { | |
90 | sr_err("Invalid Parameters."); | |
91 | g_strfreev(params); | |
92 | return NULL; | |
93 | } | |
94 | if (g_ascii_strncasecmp(params[0], "tcp", 3)) { | |
95 | sr_err("Only TCP (tcp-raw) protocol is currently supported."); | |
96 | g_strfreev(params); | |
97 | return NULL; | |
98 | } | |
99 | } | |
100 | ||
101 | maxch = (maxch > 8) ? NUM_CHANNELS : 8; | |
102 | ||
103 | sdi = g_new0(struct sr_dev_inst, 1); | |
104 | sdi->status = SR_ST_INACTIVE; | |
105 | sdi->model = g_strdup("BeagleLogic"); | |
106 | sdi->version = g_strdup("1.0"); | |
107 | ||
108 | devc = g_malloc0(sizeof(struct dev_context)); | |
109 | ||
110 | /* Default non-zero values (if any) */ | |
111 | devc->fd = -1; | |
112 | devc->limit_samples = 10000000; | |
113 | devc->tcp_buffer = 0; | |
114 | ||
115 | if (!conn) { | |
116 | devc->beaglelogic = &beaglelogic_native_ops; | |
117 | sr_info("BeagleLogic device found at "BEAGLELOGIC_DEV_NODE); | |
118 | } else { | |
119 | devc->read_timeout = 1000 * 1000; | |
120 | devc->beaglelogic = &beaglelogic_tcp_ops; | |
121 | devc->address = g_strdup(params[1]); | |
122 | devc->port = g_strdup(params[2]); | |
123 | g_strfreev(params); | |
124 | ||
125 | if (devc->beaglelogic->open(devc) != SR_OK) | |
126 | goto err_free; | |
127 | if (beaglelogic_tcp_detect(devc) != SR_OK) | |
128 | goto err_free; | |
129 | if (devc->beaglelogic->close(devc) != SR_OK) | |
130 | goto err_free; | |
131 | sr_info("BeagleLogic device found at %s : %s", | |
132 | devc->address, devc->port); | |
133 | } | |
134 | ||
135 | /* Fill the channels */ | |
136 | for (i = 0; i < maxch; i++) | |
137 | sr_channel_new(sdi, i, SR_CHANNEL_LOGIC, TRUE, | |
138 | channel_names[i]); | |
139 | ||
140 | sdi->priv = devc; | |
141 | ||
142 | return std_scan_complete(di, g_slist_append(NULL, sdi)); | |
143 | ||
144 | err_free: | |
145 | g_free(sdi->model); | |
146 | g_free(sdi->version); | |
147 | g_free(devc->address); | |
148 | g_free(devc->port); | |
149 | g_free(devc); | |
150 | g_free(sdi); | |
151 | ||
152 | return NULL; | |
153 | } | |
154 | ||
155 | static int dev_open(struct sr_dev_inst *sdi) | |
156 | { | |
157 | struct dev_context *devc = sdi->priv; | |
158 | ||
159 | /* Open BeagleLogic */ | |
160 | if (devc->beaglelogic->open(devc)) | |
161 | return SR_ERR; | |
162 | ||
163 | /* Set fd and local attributes */ | |
164 | if (devc->beaglelogic == &beaglelogic_tcp_ops) | |
165 | devc->pollfd.fd = devc->socket; | |
166 | else | |
167 | devc->pollfd.fd = devc->fd; | |
168 | devc->pollfd.events = G_IO_IN; | |
169 | devc->pollfd.revents = 0; | |
170 | ||
171 | /* Get the default attributes */ | |
172 | devc->beaglelogic->get_samplerate(devc); | |
173 | devc->beaglelogic->get_sampleunit(devc); | |
174 | devc->beaglelogic->get_buffersize(devc); | |
175 | devc->beaglelogic->get_bufunitsize(devc); | |
176 | ||
177 | /* Set the triggerflags to default for continuous capture unless we | |
178 | * explicitly limit samples using SR_CONF_LIMIT_SAMPLES */ | |
179 | devc->triggerflags = BL_TRIGGERFLAGS_CONTINUOUS; | |
180 | devc->beaglelogic->set_triggerflags(devc); | |
181 | ||
182 | /* Map the kernel capture FIFO for reads, saves 1 level of memcpy */ | |
183 | if (devc->beaglelogic == &beaglelogic_native_ops) { | |
184 | if (devc->beaglelogic->mmap(devc) != SR_OK) { | |
185 | sr_err("Unable to map capture buffer"); | |
186 | devc->beaglelogic->close(devc); | |
187 | return SR_ERR; | |
188 | } | |
189 | } else { | |
190 | devc->tcp_buffer = g_malloc(TCP_BUFFER_SIZE); | |
191 | } | |
192 | ||
193 | return SR_OK; | |
194 | } | |
195 | ||
196 | static int dev_close(struct sr_dev_inst *sdi) | |
197 | { | |
198 | struct dev_context *devc = sdi->priv; | |
199 | ||
200 | /* Close the memory mapping and the file */ | |
201 | if (devc->beaglelogic == &beaglelogic_native_ops) | |
202 | devc->beaglelogic->munmap(devc); | |
203 | devc->beaglelogic->close(devc); | |
204 | ||
205 | return SR_OK; | |
206 | } | |
207 | ||
208 | static void clear_helper(struct dev_context *devc) | |
209 | { | |
210 | g_free(devc->tcp_buffer); | |
211 | g_free(devc->address); | |
212 | g_free(devc->port); | |
213 | } | |
214 | ||
215 | static int dev_clear(const struct sr_dev_driver *di) | |
216 | { | |
217 | return std_dev_clear_with_callback(di, (std_dev_clear_callback)clear_helper); | |
218 | } | |
219 | ||
220 | static int config_get(uint32_t key, GVariant **data, | |
221 | const struct sr_dev_inst *sdi, const struct sr_channel_group *cg) | |
222 | { | |
223 | struct dev_context *devc = sdi->priv; | |
224 | ||
225 | (void)cg; | |
226 | ||
227 | switch (key) { | |
228 | case SR_CONF_LIMIT_SAMPLES: | |
229 | *data = g_variant_new_uint64(devc->limit_samples); | |
230 | break; | |
231 | case SR_CONF_SAMPLERATE: | |
232 | *data = g_variant_new_uint64(devc->cur_samplerate); | |
233 | break; | |
234 | case SR_CONF_CAPTURE_RATIO: | |
235 | *data = g_variant_new_uint64(devc->capture_ratio); | |
236 | break; | |
237 | case SR_CONF_NUM_LOGIC_CHANNELS: | |
238 | *data = g_variant_new_uint32(g_slist_length(sdi->channels)); | |
239 | break; | |
240 | default: | |
241 | return SR_ERR_NA; | |
242 | } | |
243 | ||
244 | return SR_OK; | |
245 | } | |
246 | ||
247 | static int config_set(uint32_t key, GVariant *data, | |
248 | const struct sr_dev_inst *sdi, const struct sr_channel_group *cg) | |
249 | { | |
250 | struct dev_context *devc = sdi->priv; | |
251 | uint64_t tmp_u64; | |
252 | ||
253 | (void)cg; | |
254 | ||
255 | switch (key) { | |
256 | case SR_CONF_SAMPLERATE: | |
257 | devc->cur_samplerate = g_variant_get_uint64(data); | |
258 | return devc->beaglelogic->set_samplerate(devc); | |
259 | case SR_CONF_LIMIT_SAMPLES: | |
260 | tmp_u64 = g_variant_get_uint64(data); | |
261 | devc->limit_samples = tmp_u64; | |
262 | devc->triggerflags = BL_TRIGGERFLAGS_ONESHOT; | |
263 | ||
264 | /* Check if we have sufficient buffer size */ | |
265 | tmp_u64 *= SAMPLEUNIT_TO_BYTES(devc->sampleunit); | |
266 | if (tmp_u64 > devc->buffersize) { | |
267 | sr_warn("Insufficient buffer space has been allocated."); | |
268 | sr_warn("Please use \'echo <size in bytes> > "\ | |
269 | BEAGLELOGIC_SYSFS_ATTR(memalloc) \ | |
270 | "\' to increase the buffer size, this"\ | |
271 | " capture is now truncated to %d Msamples", | |
272 | devc->buffersize / | |
273 | (SAMPLEUNIT_TO_BYTES(devc->sampleunit) * 1000000)); | |
274 | } | |
275 | return devc->beaglelogic->set_triggerflags(devc); | |
276 | case SR_CONF_CAPTURE_RATIO: | |
277 | devc->capture_ratio = g_variant_get_uint64(data); | |
278 | break; | |
279 | default: | |
280 | return SR_ERR_NA; | |
281 | } | |
282 | ||
283 | return SR_OK; | |
284 | } | |
285 | ||
286 | static int config_list(uint32_t key, GVariant **data, | |
287 | const struct sr_dev_inst *sdi, const struct sr_channel_group *cg) | |
288 | { | |
289 | switch (key) { | |
290 | case SR_CONF_SCAN_OPTIONS: | |
291 | case SR_CONF_DEVICE_OPTIONS: | |
292 | return STD_CONFIG_LIST(key, data, sdi, cg, scanopts, drvopts, devopts); | |
293 | case SR_CONF_SAMPLERATE: | |
294 | *data = std_gvar_samplerates_steps(ARRAY_AND_SIZE(samplerates)); | |
295 | break; | |
296 | case SR_CONF_TRIGGER_MATCH: | |
297 | *data = std_gvar_array_i32(ARRAY_AND_SIZE(trigger_matches)); | |
298 | break; | |
299 | default: | |
300 | return SR_ERR_NA; | |
301 | } | |
302 | ||
303 | return SR_OK; | |
304 | } | |
305 | ||
306 | /* get a sane timeout for poll() */ | |
307 | #define BUFUNIT_TIMEOUT_MS(devc) (100 + ((devc->bufunitsize * 1000) / \ | |
308 | (uint32_t)(devc->cur_samplerate))) | |
309 | ||
310 | static int dev_acquisition_start(const struct sr_dev_inst *sdi) | |
311 | { | |
312 | struct dev_context *devc = sdi->priv; | |
313 | GSList *l; | |
314 | struct sr_trigger *trigger; | |
315 | struct sr_channel *channel; | |
316 | ||
317 | /* Clear capture state */ | |
318 | devc->bytes_read = 0; | |
319 | devc->offset = 0; | |
320 | ||
321 | /* Configure channels */ | |
322 | devc->sampleunit = BL_SAMPLEUNIT_8_BITS; | |
323 | ||
324 | for (l = sdi->channels; l; l = l->next) { | |
325 | channel = l->data; | |
326 | if (channel->index >= 8 && channel->enabled) | |
327 | devc->sampleunit = BL_SAMPLEUNIT_16_BITS; | |
328 | } | |
329 | devc->beaglelogic->set_sampleunit(devc); | |
330 | ||
331 | /* If continuous sampling, set the limit_samples to max possible value */ | |
332 | if (devc->triggerflags == BL_TRIGGERFLAGS_CONTINUOUS) | |
333 | devc->limit_samples = UINT64_MAX; | |
334 | ||
335 | /* Configure triggers & send header packet */ | |
336 | if ((trigger = sr_session_trigger_get(sdi->session))) { | |
337 | int pre_trigger_samples = 0; | |
338 | if (devc->limit_samples > 0) | |
339 | pre_trigger_samples = (devc->capture_ratio * devc->limit_samples) / 100; | |
340 | devc->stl = soft_trigger_logic_new(sdi, trigger, pre_trigger_samples); | |
341 | if (!devc->stl) | |
342 | return SR_ERR_MALLOC; | |
343 | devc->trigger_fired = FALSE; | |
344 | } else | |
345 | devc->trigger_fired = TRUE; | |
346 | std_session_send_df_header(sdi); | |
347 | ||
348 | /* Trigger and add poll on file */ | |
349 | devc->beaglelogic->start(devc); | |
350 | if (devc->beaglelogic == &beaglelogic_native_ops) | |
351 | sr_session_source_add_pollfd(sdi->session, &devc->pollfd, | |
352 | BUFUNIT_TIMEOUT_MS(devc), beaglelogic_native_receive_data, | |
353 | (void *)sdi); | |
354 | else | |
355 | sr_session_source_add_pollfd(sdi->session, &devc->pollfd, | |
356 | BUFUNIT_TIMEOUT_MS(devc), beaglelogic_tcp_receive_data, | |
357 | (void *)sdi); | |
358 | ||
359 | return SR_OK; | |
360 | } | |
361 | ||
362 | static int dev_acquisition_stop(struct sr_dev_inst *sdi) | |
363 | { | |
364 | struct dev_context *devc = sdi->priv; | |
365 | ||
366 | /* Execute a stop on BeagleLogic */ | |
367 | devc->beaglelogic->stop(devc); | |
368 | ||
369 | /* Flush the cache */ | |
370 | if (devc->beaglelogic == &beaglelogic_native_ops) | |
371 | lseek(devc->fd, 0, SEEK_SET); | |
372 | else | |
373 | beaglelogic_tcp_drain(devc); | |
374 | ||
375 | /* Remove session source and send EOT packet */ | |
376 | sr_session_source_remove_pollfd(sdi->session, &devc->pollfd); | |
377 | std_session_send_df_end(sdi); | |
378 | ||
379 | return SR_OK; | |
380 | } | |
381 | ||
382 | static struct sr_dev_driver beaglelogic_driver_info = { | |
383 | .name = "beaglelogic", | |
384 | .longname = "BeagleLogic", | |
385 | .api_version = 1, | |
386 | .init = std_init, | |
387 | .cleanup = std_cleanup, | |
388 | .scan = scan, | |
389 | .dev_list = std_dev_list, | |
390 | .dev_clear = dev_clear, | |
391 | .config_get = config_get, | |
392 | .config_set = config_set, | |
393 | .config_list = config_list, | |
394 | .dev_open = dev_open, | |
395 | .dev_close = dev_close, | |
396 | .dev_acquisition_start = dev_acquisition_start, | |
397 | .dev_acquisition_stop = dev_acquisition_stop, | |
398 | .context = NULL, | |
399 | }; | |
400 | SR_REGISTER_DEV_DRIVER(beaglelogic_driver_info); |