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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 | /* Scan options */ | |
25 | static const uint32_t scanopts[] = { | |
26 | SR_CONF_NUM_LOGIC_CHANNELS, | |
27 | }; | |
28 | ||
29 | static const uint32_t drvopts[] = { | |
30 | SR_CONF_LOGIC_ANALYZER, | |
31 | }; | |
32 | ||
33 | /* Hardware capabilities */ | |
34 | static const uint32_t devopts[] = { | |
35 | SR_CONF_CONTINUOUS, | |
36 | SR_CONF_LIMIT_SAMPLES | SR_CONF_GET | SR_CONF_SET, | |
37 | SR_CONF_SAMPLERATE | SR_CONF_GET | SR_CONF_SET, | |
38 | SR_CONF_TRIGGER_MATCH | SR_CONF_LIST, | |
39 | SR_CONF_CAPTURE_RATIO | SR_CONF_GET | SR_CONF_SET, | |
40 | SR_CONF_NUM_LOGIC_CHANNELS | SR_CONF_GET, | |
41 | }; | |
42 | ||
43 | /* Trigger matching capabilities */ | |
44 | static const int32_t soft_trigger_matches[] = { | |
45 | SR_TRIGGER_ZERO, | |
46 | SR_TRIGGER_ONE, | |
47 | SR_TRIGGER_RISING, | |
48 | SR_TRIGGER_FALLING, | |
49 | SR_TRIGGER_EDGE, | |
50 | }; | |
51 | ||
52 | SR_PRIV const char *channel_names[] = { | |
53 | "P8_45", "P8_46", "P8_43", "P8_44", "P8_41", "P8_42", "P8_39", | |
54 | "P8_40", "P8_27", "P8_29", "P8_28", "P8_30", "P8_21", "P8_20", | |
55 | }; | |
56 | ||
57 | /* Possible sample rates : 10 Hz to 100 MHz = (100 / x) MHz */ | |
58 | static const uint64_t samplerates[] = { | |
59 | SR_HZ(10), | |
60 | SR_MHZ(100), | |
61 | SR_HZ(1), | |
62 | }; | |
63 | ||
64 | static struct dev_context *beaglelogic_devc_alloc(void) | |
65 | { | |
66 | struct dev_context *devc; | |
67 | ||
68 | devc = g_malloc0(sizeof(struct dev_context)); | |
69 | ||
70 | /* Default non-zero values (if any) */ | |
71 | devc->fd = -1; | |
72 | devc->limit_samples = (uint64_t)-1; | |
73 | ||
74 | return devc; | |
75 | } | |
76 | ||
77 | static GSList *scan(struct sr_dev_driver *di, GSList *options) | |
78 | { | |
79 | GSList *l; | |
80 | struct sr_config *src; | |
81 | struct sr_dev_inst *sdi; | |
82 | struct dev_context *devc; | |
83 | int i, maxch; | |
84 | ||
85 | /* Probe for /dev/beaglelogic */ | |
86 | if (!g_file_test(BEAGLELOGIC_DEV_NODE, G_FILE_TEST_EXISTS)) | |
87 | return NULL; | |
88 | ||
89 | sdi = g_malloc0(sizeof(struct sr_dev_inst)); | |
90 | sdi->status = SR_ST_INACTIVE; | |
91 | sdi->model = g_strdup("BeagleLogic"); | |
92 | sdi->version = g_strdup("1.0"); | |
93 | ||
94 | /* Unless explicitly specified, keep max channels to 8 only */ | |
95 | maxch = 8; | |
96 | for (l = options; l; l = l->next) { | |
97 | src = l->data; | |
98 | if (src->key == SR_CONF_NUM_LOGIC_CHANNELS) | |
99 | maxch = g_variant_get_int32(src->data); | |
100 | } | |
101 | ||
102 | /* We need to test for number of channels by opening the node */ | |
103 | devc = beaglelogic_devc_alloc(); | |
104 | ||
105 | if (beaglelogic_open_nonblock(devc) != SR_OK) { | |
106 | g_free(devc); | |
107 | sr_dev_inst_free(sdi); | |
108 | ||
109 | return NULL; | |
110 | } | |
111 | ||
112 | if (maxch > 8) { | |
113 | maxch = NUM_CHANNELS; | |
114 | devc->sampleunit = BL_SAMPLEUNIT_16_BITS; | |
115 | } else { | |
116 | maxch = 8; | |
117 | devc->sampleunit = BL_SAMPLEUNIT_8_BITS; | |
118 | } | |
119 | ||
120 | beaglelogic_set_sampleunit(devc); | |
121 | beaglelogic_close(devc); | |
122 | ||
123 | /* Signal */ | |
124 | sr_info("BeagleLogic device found at "BEAGLELOGIC_DEV_NODE); | |
125 | ||
126 | /* Fill the channels */ | |
127 | for (i = 0; i < maxch; i++) | |
128 | sr_channel_new(sdi, i, SR_CHANNEL_LOGIC, TRUE, | |
129 | channel_names[i]); | |
130 | ||
131 | sdi->priv = devc; | |
132 | ||
133 | return std_scan_complete(di, g_slist_append(NULL, sdi)); | |
134 | } | |
135 | ||
136 | static int dev_open(struct sr_dev_inst *sdi) | |
137 | { | |
138 | struct dev_context *devc = sdi->priv; | |
139 | ||
140 | /* Open BeagleLogic */ | |
141 | if (beaglelogic_open_nonblock(devc)) | |
142 | return SR_ERR; | |
143 | ||
144 | /* Set fd and local attributes */ | |
145 | devc->pollfd.fd = devc->fd; | |
146 | devc->pollfd.events = G_IO_IN; | |
147 | devc->pollfd.revents = 0; | |
148 | ||
149 | /* Get the default attributes */ | |
150 | beaglelogic_get_samplerate(devc); | |
151 | beaglelogic_get_sampleunit(devc); | |
152 | beaglelogic_get_triggerflags(devc); | |
153 | beaglelogic_get_buffersize(devc); | |
154 | beaglelogic_get_bufunitsize(devc); | |
155 | ||
156 | /* Map the kernel capture FIFO for reads, saves 1 level of memcpy */ | |
157 | if (beaglelogic_mmap(devc) != SR_OK) { | |
158 | sr_err("Unable to map capture buffer"); | |
159 | beaglelogic_close(devc); | |
160 | return SR_ERR; | |
161 | } | |
162 | ||
163 | return SR_OK; | |
164 | } | |
165 | ||
166 | static int dev_close(struct sr_dev_inst *sdi) | |
167 | { | |
168 | struct dev_context *devc = sdi->priv; | |
169 | ||
170 | /* Close the memory mapping and the file */ | |
171 | beaglelogic_munmap(devc); | |
172 | beaglelogic_close(devc); | |
173 | ||
174 | return SR_OK; | |
175 | } | |
176 | ||
177 | static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi, | |
178 | const struct sr_channel_group *cg) | |
179 | { | |
180 | struct dev_context *devc = sdi->priv; | |
181 | ||
182 | (void)cg; | |
183 | ||
184 | switch (key) { | |
185 | case SR_CONF_LIMIT_SAMPLES: | |
186 | *data = g_variant_new_uint64(devc->limit_samples); | |
187 | break; | |
188 | case SR_CONF_SAMPLERATE: | |
189 | *data = g_variant_new_uint64(devc->cur_samplerate); | |
190 | break; | |
191 | case SR_CONF_CAPTURE_RATIO: | |
192 | *data = g_variant_new_uint64(devc->capture_ratio); | |
193 | break; | |
194 | case SR_CONF_NUM_LOGIC_CHANNELS: | |
195 | *data = g_variant_new_uint32(g_slist_length(sdi->channels)); | |
196 | break; | |
197 | default: | |
198 | return SR_ERR_NA; | |
199 | } | |
200 | ||
201 | return SR_OK; | |
202 | } | |
203 | ||
204 | static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi, | |
205 | const struct sr_channel_group *cg) | |
206 | { | |
207 | struct dev_context *devc = sdi->priv; | |
208 | uint64_t tmp_u64; | |
209 | ||
210 | (void)cg; | |
211 | ||
212 | switch (key) { | |
213 | case SR_CONF_SAMPLERATE: | |
214 | devc->cur_samplerate = g_variant_get_uint64(data); | |
215 | return beaglelogic_set_samplerate(devc); | |
216 | case SR_CONF_LIMIT_SAMPLES: | |
217 | tmp_u64 = g_variant_get_uint64(data); | |
218 | devc->limit_samples = tmp_u64; | |
219 | devc->triggerflags = BL_TRIGGERFLAGS_ONESHOT; | |
220 | ||
221 | /* Check if we have sufficient buffer size */ | |
222 | tmp_u64 *= SAMPLEUNIT_TO_BYTES(devc->sampleunit); | |
223 | if (tmp_u64 > devc->buffersize) { | |
224 | sr_warn("Insufficient buffer space has been allocated."); | |
225 | sr_warn("Please use \'echo <size in bytes> > "\ | |
226 | BEAGLELOGIC_SYSFS_ATTR(memalloc) \ | |
227 | "\' as root to increase the buffer size, this"\ | |
228 | " capture is now truncated to %d Msamples", | |
229 | devc->buffersize / | |
230 | (SAMPLEUNIT_TO_BYTES(devc->sampleunit) * 1000000)); | |
231 | } | |
232 | return beaglelogic_set_triggerflags(devc); | |
233 | case SR_CONF_CAPTURE_RATIO: | |
234 | devc->capture_ratio = g_variant_get_uint64(data); | |
235 | if (devc->capture_ratio > 100) | |
236 | return SR_ERR; | |
237 | return SR_OK; | |
238 | default: | |
239 | return SR_ERR_NA; | |
240 | } | |
241 | ||
242 | return SR_OK; | |
243 | } | |
244 | ||
245 | static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi, | |
246 | const struct sr_channel_group *cg) | |
247 | { | |
248 | GVariant *gvar; | |
249 | GVariantBuilder gvb; | |
250 | ||
251 | switch (key) { | |
252 | case SR_CONF_SCAN_OPTIONS: | |
253 | case SR_CONF_DEVICE_OPTIONS: | |
254 | return STD_CONFIG_LIST(key, data, sdi, cg, scanopts, drvopts, devopts); | |
255 | case SR_CONF_SAMPLERATE: | |
256 | g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}")); | |
257 | gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"), | |
258 | samplerates, ARRAY_SIZE(samplerates), sizeof(uint64_t)); | |
259 | g_variant_builder_add(&gvb, "{sv}", "samplerate-steps", gvar); | |
260 | *data = g_variant_builder_end(&gvb); | |
261 | break; | |
262 | case SR_CONF_TRIGGER_MATCH: | |
263 | *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32, | |
264 | soft_trigger_matches, ARRAY_SIZE(soft_trigger_matches), | |
265 | sizeof(int32_t)); | |
266 | break; | |
267 | default: | |
268 | return SR_ERR_NA; | |
269 | } | |
270 | ||
271 | return SR_OK; | |
272 | } | |
273 | ||
274 | /* get a sane timeout for poll() */ | |
275 | #define BUFUNIT_TIMEOUT_MS(devc) (100 + ((devc->bufunitsize * 1000) / \ | |
276 | (uint32_t)(devc->cur_samplerate))) | |
277 | ||
278 | static int dev_acquisition_start(const struct sr_dev_inst *sdi) | |
279 | { | |
280 | struct dev_context *devc = sdi->priv; | |
281 | struct sr_trigger *trigger; | |
282 | ||
283 | /* Clear capture state */ | |
284 | devc->bytes_read = 0; | |
285 | devc->offset = 0; | |
286 | ||
287 | /* Configure channels */ | |
288 | devc->sampleunit = g_slist_length(sdi->channels) > 8 ? | |
289 | BL_SAMPLEUNIT_16_BITS : BL_SAMPLEUNIT_8_BITS; | |
290 | beaglelogic_set_sampleunit(devc); | |
291 | ||
292 | /* Configure triggers & send header packet */ | |
293 | if ((trigger = sr_session_trigger_get(sdi->session))) { | |
294 | int pre_trigger_samples = 0; | |
295 | if (devc->limit_samples > 0) | |
296 | pre_trigger_samples = devc->capture_ratio * devc->limit_samples/100; | |
297 | devc->stl = soft_trigger_logic_new(sdi, trigger, pre_trigger_samples); | |
298 | if (!devc->stl) | |
299 | return SR_ERR_MALLOC; | |
300 | devc->trigger_fired = FALSE; | |
301 | } else | |
302 | devc->trigger_fired = TRUE; | |
303 | std_session_send_df_header(sdi); | |
304 | ||
305 | /* Trigger and add poll on file */ | |
306 | beaglelogic_start(devc); | |
307 | sr_session_source_add_pollfd(sdi->session, &devc->pollfd, | |
308 | BUFUNIT_TIMEOUT_MS(devc), beaglelogic_receive_data, | |
309 | (void *)sdi); | |
310 | ||
311 | return SR_OK; | |
312 | } | |
313 | ||
314 | static int dev_acquisition_stop(struct sr_dev_inst *sdi) | |
315 | { | |
316 | struct dev_context *devc = sdi->priv; | |
317 | ||
318 | /* Execute a stop on BeagleLogic */ | |
319 | beaglelogic_stop(devc); | |
320 | ||
321 | /* lseek to offset 0, flushes the cache */ | |
322 | lseek(devc->fd, 0, SEEK_SET); | |
323 | ||
324 | /* Remove session source and send EOT packet */ | |
325 | sr_session_source_remove_pollfd(sdi->session, &devc->pollfd); | |
326 | std_session_send_df_end(sdi); | |
327 | ||
328 | return SR_OK; | |
329 | } | |
330 | ||
331 | static struct sr_dev_driver beaglelogic_driver_info = { | |
332 | .name = "beaglelogic", | |
333 | .longname = "BeagleLogic", | |
334 | .api_version = 1, | |
335 | .init = std_init, | |
336 | .cleanup = std_cleanup, | |
337 | .scan = scan, | |
338 | .dev_list = std_dev_list, | |
339 | .dev_clear = std_dev_clear, | |
340 | .config_get = config_get, | |
341 | .config_set = config_set, | |
342 | .config_list = config_list, | |
343 | .dev_open = dev_open, | |
344 | .dev_close = dev_close, | |
345 | .dev_acquisition_start = dev_acquisition_start, | |
346 | .dev_acquisition_stop = dev_acquisition_stop, | |
347 | .context = NULL, | |
348 | }; | |
349 | SR_REGISTER_DEV_DRIVER(beaglelogic_driver_info); |