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1 | /* | |
2 | * This file is part of the libsigrok project. | |
3 | * | |
4 | * Copyright (C) 2014 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 | SR_PRIV struct sr_dev_driver beaglelogic_driver_info; | |
25 | ||
26 | /* Scan options */ | |
27 | static const uint32_t scanopts[] = { | |
28 | SR_CONF_NUM_LOGIC_CHANNELS, | |
29 | }; | |
30 | ||
31 | /* Hardware capabilities */ | |
32 | static const uint32_t devopts[] = { | |
33 | SR_CONF_LOGIC_ANALYZER, | |
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, | |
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 | /* Trigger matching capabilities */ | |
43 | static const int32_t soft_trigger_matches[] = { | |
44 | SR_TRIGGER_ZERO, | |
45 | SR_TRIGGER_ONE, | |
46 | SR_TRIGGER_RISING, | |
47 | SR_TRIGGER_FALLING, | |
48 | SR_TRIGGER_EDGE, | |
49 | }; | |
50 | ||
51 | SR_PRIV const char *channel_names[] = { | |
52 | "P8_45", "P8_46", "P8_43", "P8_44", "P8_41", "P8_42", "P8_39", | |
53 | "P8_40", "P8_27", "P8_29", "P8_28", "P8_30", "P8_21", "P8_20", | |
54 | }; | |
55 | ||
56 | /* Possible sample rates : 10 Hz to 100 MHz = (100 / x) MHz */ | |
57 | static const uint64_t samplerates[] = { | |
58 | SR_HZ(10), | |
59 | SR_MHZ(100), | |
60 | SR_HZ(1), | |
61 | }; | |
62 | ||
63 | static struct dev_context *beaglelogic_devc_alloc(void) | |
64 | { | |
65 | struct dev_context *devc; | |
66 | ||
67 | devc = g_malloc0(sizeof(struct dev_context)); | |
68 | ||
69 | /* Default non-zero values (if any) */ | |
70 | devc->fd = -1; | |
71 | devc->limit_samples = (uint64_t)-1; | |
72 | ||
73 | return devc; | |
74 | } | |
75 | ||
76 | static GSList *scan(struct sr_dev_driver *di, GSList *options) | |
77 | { | |
78 | struct drv_context *drvc; | |
79 | GSList *devices, *l; | |
80 | struct sr_config *src; | |
81 | struct sr_dev_inst *sdi; | |
82 | struct dev_context *devc; | |
83 | int i, maxch; | |
84 | ||
85 | devices = NULL; | |
86 | drvc = di->context; | |
87 | drvc->instances = NULL; | |
88 | ||
89 | /* Probe for /dev/beaglelogic */ | |
90 | if (!g_file_test(BEAGLELOGIC_DEV_NODE, G_FILE_TEST_EXISTS)) | |
91 | return NULL; | |
92 | ||
93 | sdi = g_malloc0(sizeof(struct sr_dev_inst)); | |
94 | sdi->status = SR_ST_INACTIVE; | |
95 | sdi->model = g_strdup("BeagleLogic"); | |
96 | sdi->version = g_strdup("1.0"); | |
97 | sdi->driver = di; | |
98 | ||
99 | /* Unless explicitly specified, keep max channels to 8 only */ | |
100 | maxch = 8; | |
101 | for (l = options; l; l = l->next) { | |
102 | src = l->data; | |
103 | if (src->key == SR_CONF_NUM_LOGIC_CHANNELS) | |
104 | maxch = g_variant_get_int32(src->data); | |
105 | } | |
106 | ||
107 | /* We need to test for number of channels by opening the node */ | |
108 | devc = beaglelogic_devc_alloc(); | |
109 | ||
110 | if (beaglelogic_open_nonblock(devc) != SR_OK) { | |
111 | g_free(devc); | |
112 | sr_dev_inst_free(sdi); | |
113 | ||
114 | return NULL; | |
115 | } | |
116 | ||
117 | if (maxch > 8) { | |
118 | maxch = NUM_CHANNELS; | |
119 | devc->sampleunit = BL_SAMPLEUNIT_16_BITS; | |
120 | } else { | |
121 | maxch = 8; | |
122 | devc->sampleunit = BL_SAMPLEUNIT_8_BITS; | |
123 | } | |
124 | ||
125 | beaglelogic_set_sampleunit(devc); | |
126 | beaglelogic_close(devc); | |
127 | ||
128 | /* Signal */ | |
129 | sr_info("BeagleLogic device found at "BEAGLELOGIC_DEV_NODE); | |
130 | ||
131 | /* Fill the channels */ | |
132 | for (i = 0; i < maxch; i++) | |
133 | sr_channel_new(sdi, i, SR_CHANNEL_LOGIC, TRUE, | |
134 | channel_names[i]); | |
135 | ||
136 | sdi->priv = devc; | |
137 | drvc->instances = g_slist_append(drvc->instances, sdi); | |
138 | devices = g_slist_append(devices, sdi); | |
139 | ||
140 | return devices; | |
141 | } | |
142 | ||
143 | static int dev_open(struct sr_dev_inst *sdi) | |
144 | { | |
145 | struct dev_context *devc = sdi->priv; | |
146 | ||
147 | /* Open BeagleLogic */ | |
148 | if (beaglelogic_open_nonblock(devc)) | |
149 | return SR_ERR; | |
150 | ||
151 | /* Set fd and local attributes */ | |
152 | devc->pollfd.fd = devc->fd; | |
153 | devc->pollfd.events = G_IO_IN; | |
154 | devc->pollfd.revents = 0; | |
155 | ||
156 | /* Get the default attributes */ | |
157 | beaglelogic_get_samplerate(devc); | |
158 | beaglelogic_get_sampleunit(devc); | |
159 | beaglelogic_get_triggerflags(devc); | |
160 | beaglelogic_get_buffersize(devc); | |
161 | beaglelogic_get_bufunitsize(devc); | |
162 | ||
163 | /* Map the kernel capture FIFO for reads, saves 1 level of memcpy */ | |
164 | if (beaglelogic_mmap(devc) != SR_OK) { | |
165 | sr_err("Unable to map capture buffer"); | |
166 | beaglelogic_close(devc); | |
167 | return SR_ERR; | |
168 | } | |
169 | ||
170 | /* We're good to go now */ | |
171 | sdi->status = SR_ST_ACTIVE; | |
172 | return SR_OK; | |
173 | } | |
174 | ||
175 | static int dev_close(struct sr_dev_inst *sdi) | |
176 | { | |
177 | struct dev_context *devc = sdi->priv; | |
178 | ||
179 | if (sdi->status == SR_ST_ACTIVE) { | |
180 | /* Close the memory mapping and the file */ | |
181 | beaglelogic_munmap(devc); | |
182 | beaglelogic_close(devc); | |
183 | } | |
184 | sdi->status = SR_ST_INACTIVE; | |
185 | return SR_OK; | |
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 = sdi->priv; | |
192 | ||
193 | (void)cg; | |
194 | ||
195 | switch (key) { | |
196 | case SR_CONF_LIMIT_SAMPLES: | |
197 | *data = g_variant_new_uint64(devc->limit_samples); | |
198 | break; | |
199 | case SR_CONF_SAMPLERATE: | |
200 | *data = g_variant_new_uint64(devc->cur_samplerate); | |
201 | break; | |
202 | case SR_CONF_CAPTURE_RATIO: | |
203 | *data = g_variant_new_uint64(devc->capture_ratio); | |
204 | break; | |
205 | case SR_CONF_NUM_LOGIC_CHANNELS: | |
206 | *data = g_variant_new_uint32(g_slist_length(sdi->channels)); | |
207 | break; | |
208 | default: | |
209 | return SR_ERR_NA; | |
210 | } | |
211 | ||
212 | return SR_OK; | |
213 | } | |
214 | ||
215 | static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi, | |
216 | const struct sr_channel_group *cg) | |
217 | { | |
218 | struct dev_context *devc = sdi->priv; | |
219 | uint64_t tmp_u64; | |
220 | ||
221 | (void)cg; | |
222 | ||
223 | if (sdi->status != SR_ST_ACTIVE) | |
224 | return SR_ERR_DEV_CLOSED; | |
225 | ||
226 | switch (key) { | |
227 | case SR_CONF_SAMPLERATE: | |
228 | devc->cur_samplerate = g_variant_get_uint64(data); | |
229 | return beaglelogic_set_samplerate(devc); | |
230 | case SR_CONF_LIMIT_SAMPLES: | |
231 | tmp_u64 = g_variant_get_uint64(data); | |
232 | devc->limit_samples = tmp_u64; | |
233 | devc->triggerflags = BL_TRIGGERFLAGS_ONESHOT; | |
234 | ||
235 | /* Check if we have sufficient buffer size */ | |
236 | tmp_u64 *= SAMPLEUNIT_TO_BYTES(devc->sampleunit); | |
237 | if (tmp_u64 > devc->buffersize) { | |
238 | sr_warn("Insufficient buffer space has been allocated."); | |
239 | sr_warn("Please use \'echo <size in bytes> > "\ | |
240 | BEAGLELOGIC_SYSFS_ATTR(memalloc) \ | |
241 | "\' as root to increase the buffer size, this"\ | |
242 | " capture is now truncated to %d Msamples", | |
243 | devc->buffersize / | |
244 | (SAMPLEUNIT_TO_BYTES(devc->sampleunit) * 1000000)); | |
245 | } | |
246 | return beaglelogic_set_triggerflags(devc); | |
247 | case SR_CONF_CAPTURE_RATIO: | |
248 | devc->capture_ratio = g_variant_get_uint64(data); | |
249 | if (devc->capture_ratio > 100) | |
250 | return SR_ERR; | |
251 | return SR_OK; | |
252 | default: | |
253 | return SR_ERR_NA; | |
254 | } | |
255 | ||
256 | return SR_OK; | |
257 | } | |
258 | ||
259 | static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi, | |
260 | const struct sr_channel_group *cg) | |
261 | { | |
262 | int ret; | |
263 | GVariant *gvar; | |
264 | GVariantBuilder gvb; | |
265 | ||
266 | (void)sdi; | |
267 | (void)cg; | |
268 | ||
269 | ret = SR_OK; | |
270 | switch (key) { | |
271 | case SR_CONF_SCAN_OPTIONS: | |
272 | *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32, | |
273 | scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t)); | |
274 | break; | |
275 | case SR_CONF_DEVICE_OPTIONS: | |
276 | *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32, | |
277 | devopts, ARRAY_SIZE(devopts), sizeof(uint32_t)); | |
278 | break; | |
279 | case SR_CONF_SAMPLERATE: | |
280 | g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}")); | |
281 | gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"), | |
282 | samplerates, ARRAY_SIZE(samplerates), sizeof(uint64_t)); | |
283 | g_variant_builder_add(&gvb, "{sv}", "samplerate-steps", gvar); | |
284 | *data = g_variant_builder_end(&gvb); | |
285 | break; | |
286 | case SR_CONF_TRIGGER_MATCH: | |
287 | *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32, | |
288 | soft_trigger_matches, ARRAY_SIZE(soft_trigger_matches), | |
289 | sizeof(int32_t)); | |
290 | break; | |
291 | default: | |
292 | return SR_ERR_NA; | |
293 | } | |
294 | ||
295 | return ret; | |
296 | } | |
297 | ||
298 | /* get a sane timeout for poll() */ | |
299 | #define BUFUNIT_TIMEOUT_MS(devc) (100 + ((devc->bufunitsize * 1000) / \ | |
300 | (uint32_t)(devc->cur_samplerate))) | |
301 | ||
302 | static int dev_acquisition_start(const struct sr_dev_inst *sdi) | |
303 | { | |
304 | struct dev_context *devc = sdi->priv; | |
305 | struct sr_trigger *trigger; | |
306 | ||
307 | if (sdi->status != SR_ST_ACTIVE) | |
308 | return SR_ERR_DEV_CLOSED; | |
309 | ||
310 | /* Clear capture state */ | |
311 | devc->bytes_read = 0; | |
312 | devc->offset = 0; | |
313 | ||
314 | /* Configure channels */ | |
315 | devc->sampleunit = g_slist_length(sdi->channels) > 8 ? | |
316 | BL_SAMPLEUNIT_16_BITS : BL_SAMPLEUNIT_8_BITS; | |
317 | beaglelogic_set_sampleunit(devc); | |
318 | ||
319 | /* Configure triggers & send header packet */ | |
320 | if ((trigger = sr_session_trigger_get(sdi->session))) { | |
321 | int pre_trigger_samples = 0; | |
322 | if (devc->limit_samples > 0) | |
323 | pre_trigger_samples = devc->capture_ratio * devc->limit_samples/100; | |
324 | devc->stl = soft_trigger_logic_new(sdi, trigger, pre_trigger_samples); | |
325 | if (!devc->stl) | |
326 | return SR_ERR_MALLOC; | |
327 | devc->trigger_fired = FALSE; | |
328 | } else | |
329 | devc->trigger_fired = TRUE; | |
330 | std_session_send_df_header(sdi, LOG_PREFIX); | |
331 | ||
332 | /* Trigger and add poll on file */ | |
333 | beaglelogic_start(devc); | |
334 | sr_session_source_add_pollfd(sdi->session, &devc->pollfd, | |
335 | BUFUNIT_TIMEOUT_MS(devc), beaglelogic_receive_data, | |
336 | (void *)sdi); | |
337 | ||
338 | return SR_OK; | |
339 | } | |
340 | ||
341 | static int dev_acquisition_stop(struct sr_dev_inst *sdi) | |
342 | { | |
343 | struct dev_context *devc = sdi->priv; | |
344 | ||
345 | if (sdi->status != SR_ST_ACTIVE) | |
346 | return SR_ERR_DEV_CLOSED; | |
347 | ||
348 | /* Execute a stop on BeagleLogic */ | |
349 | beaglelogic_stop(devc); | |
350 | ||
351 | /* lseek to offset 0, flushes the cache */ | |
352 | lseek(devc->fd, 0, SEEK_SET); | |
353 | ||
354 | /* Remove session source and send EOT packet */ | |
355 | sr_session_source_remove_pollfd(sdi->session, &devc->pollfd); | |
356 | std_session_send_df_end(sdi, LOG_PREFIX); | |
357 | ||
358 | return SR_OK; | |
359 | } | |
360 | ||
361 | SR_PRIV struct sr_dev_driver beaglelogic_driver_info = { | |
362 | .name = "beaglelogic", | |
363 | .longname = "BeagleLogic", | |
364 | .api_version = 1, | |
365 | .init = std_init, | |
366 | .cleanup = std_cleanup, | |
367 | .scan = scan, | |
368 | .dev_list = std_dev_list, | |
369 | .config_get = config_get, | |
370 | .config_set = config_set, | |
371 | .config_list = config_list, | |
372 | .dev_open = dev_open, | |
373 | .dev_close = dev_close, | |
374 | .dev_acquisition_start = dev_acquisition_start, | |
375 | .dev_acquisition_stop = dev_acquisition_stop, | |
376 | .context = NULL, | |
377 | }; |