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bb993797 KA |
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 | ||
6ec6c43b | 20 | #include <config.h> |
bb993797 | 21 | #include "protocol.h" |
ad9dbc1c | 22 | #include "beaglelogic.h" |
bb993797 | 23 | |
138589b0 BV |
24 | /* Scan options */ |
25 | static const uint32_t scanopts[] = { | |
26 | SR_CONF_NUM_LOGIC_CHANNELS, | |
27 | }; | |
28 | ||
29 | /* Hardware capabilities */ | |
f254bc4b | 30 | static const uint32_t devopts[] = { |
ad9dbc1c | 31 | SR_CONF_LOGIC_ANALYZER, |
ad9dbc1c | 32 | SR_CONF_CONTINUOUS, |
5827f61b BV |
33 | SR_CONF_LIMIT_SAMPLES | SR_CONF_GET | SR_CONF_SET, |
34 | SR_CONF_SAMPLERATE | SR_CONF_GET | SR_CONF_SET, | |
35 | SR_CONF_TRIGGER_MATCH | SR_CONF_LIST, | |
e743a47d | 36 | SR_CONF_CAPTURE_RATIO | SR_CONF_GET | SR_CONF_SET, |
5827f61b | 37 | SR_CONF_NUM_LOGIC_CHANNELS | SR_CONF_GET, |
ad9dbc1c KA |
38 | }; |
39 | ||
40 | /* Trigger matching capabilities */ | |
41 | static const int32_t soft_trigger_matches[] = { | |
42 | SR_TRIGGER_ZERO, | |
43 | SR_TRIGGER_ONE, | |
44 | SR_TRIGGER_RISING, | |
45 | SR_TRIGGER_FALLING, | |
46 | SR_TRIGGER_EDGE, | |
47 | }; | |
48 | ||
0f34cb47 UH |
49 | SR_PRIV const char *channel_names[] = { |
50 | "P8_45", "P8_46", "P8_43", "P8_44", "P8_41", "P8_42", "P8_39", | |
51 | "P8_40", "P8_27", "P8_29", "P8_28", "P8_30", "P8_21", "P8_20", | |
ad9dbc1c KA |
52 | }; |
53 | ||
54 | /* Possible sample rates : 10 Hz to 100 MHz = (100 / x) MHz */ | |
55 | static const uint64_t samplerates[] = { | |
138589b0 BV |
56 | SR_HZ(10), |
57 | SR_MHZ(100), | |
58 | SR_HZ(1), | |
ad9dbc1c KA |
59 | }; |
60 | ||
f57d8ffe | 61 | static struct dev_context *beaglelogic_devc_alloc(void) |
ad9dbc1c KA |
62 | { |
63 | struct dev_context *devc; | |
64 | ||
f57d8ffe | 65 | devc = g_malloc0(sizeof(struct dev_context)); |
ad9dbc1c KA |
66 | |
67 | /* Default non-zero values (if any) */ | |
68 | devc->fd = -1; | |
69 | devc->limit_samples = (uint64_t)-1; | |
70 | ||
71 | return devc; | |
72 | } | |
73 | ||
4f840ce9 | 74 | static GSList *scan(struct sr_dev_driver *di, GSList *options) |
bb993797 KA |
75 | { |
76 | struct drv_context *drvc; | |
ad9dbc1c KA |
77 | GSList *devices, *l; |
78 | struct sr_config *src; | |
79 | struct sr_dev_inst *sdi; | |
80 | struct dev_context *devc; | |
ad9dbc1c | 81 | int i, maxch; |
bb993797 KA |
82 | |
83 | devices = NULL; | |
41812aca | 84 | drvc = di->context; |
bb993797 KA |
85 | drvc->instances = NULL; |
86 | ||
ad9dbc1c KA |
87 | /* Probe for /dev/beaglelogic */ |
88 | if (!g_file_test(BEAGLELOGIC_DEV_NODE, G_FILE_TEST_EXISTS)) | |
89 | return NULL; | |
90 | ||
aac29cc1 | 91 | sdi = g_malloc0(sizeof(struct sr_dev_inst)); |
0af636be UH |
92 | sdi->status = SR_ST_INACTIVE; |
93 | sdi->model = g_strdup("BeagleLogic"); | |
94 | sdi->version = g_strdup("1.0"); | |
ad9dbc1c KA |
95 | sdi->driver = di; |
96 | ||
97 | /* Unless explicitly specified, keep max channels to 8 only */ | |
98 | maxch = 8; | |
99 | for (l = options; l; l = l->next) { | |
100 | src = l->data; | |
101 | if (src->key == SR_CONF_NUM_LOGIC_CHANNELS) | |
102 | maxch = g_variant_get_int32(src->data); | |
103 | } | |
104 | ||
105 | /* We need to test for number of channels by opening the node */ | |
106 | devc = beaglelogic_devc_alloc(); | |
107 | ||
108 | if (beaglelogic_open_nonblock(devc) != SR_OK) { | |
109 | g_free(devc); | |
110 | sr_dev_inst_free(sdi); | |
111 | ||
112 | return NULL; | |
113 | } | |
114 | ||
115 | if (maxch > 8) { | |
116 | maxch = NUM_CHANNELS; | |
117 | devc->sampleunit = BL_SAMPLEUNIT_16_BITS; | |
118 | } else { | |
119 | maxch = 8; | |
120 | devc->sampleunit = BL_SAMPLEUNIT_8_BITS; | |
121 | } | |
122 | ||
123 | beaglelogic_set_sampleunit(devc); | |
124 | beaglelogic_close(devc); | |
125 | ||
126 | /* Signal */ | |
127 | sr_info("BeagleLogic device found at "BEAGLELOGIC_DEV_NODE); | |
128 | ||
129 | /* Fill the channels */ | |
5e23fcab ML |
130 | for (i = 0; i < maxch; i++) |
131 | sr_channel_new(sdi, i, SR_CHANNEL_LOGIC, TRUE, | |
0f34cb47 | 132 | channel_names[i]); |
ad9dbc1c KA |
133 | |
134 | sdi->priv = devc; | |
135 | drvc->instances = g_slist_append(drvc->instances, sdi); | |
136 | devices = g_slist_append(devices, sdi); | |
bb993797 KA |
137 | |
138 | return devices; | |
139 | } | |
140 | ||
bb993797 KA |
141 | static int dev_open(struct sr_dev_inst *sdi) |
142 | { | |
ad9dbc1c KA |
143 | struct dev_context *devc = sdi->priv; |
144 | ||
145 | /* Open BeagleLogic */ | |
146 | if (beaglelogic_open_nonblock(devc)) | |
147 | return SR_ERR; | |
148 | ||
149 | /* Set fd and local attributes */ | |
150 | devc->pollfd.fd = devc->fd; | |
151 | devc->pollfd.events = G_IO_IN; | |
89efe064 | 152 | devc->pollfd.revents = 0; |
ad9dbc1c KA |
153 | |
154 | /* Get the default attributes */ | |
155 | beaglelogic_get_samplerate(devc); | |
156 | beaglelogic_get_sampleunit(devc); | |
157 | beaglelogic_get_triggerflags(devc); | |
158 | beaglelogic_get_buffersize(devc); | |
159 | beaglelogic_get_bufunitsize(devc); | |
160 | ||
161 | /* Map the kernel capture FIFO for reads, saves 1 level of memcpy */ | |
162 | if (beaglelogic_mmap(devc) != SR_OK) { | |
163 | sr_err("Unable to map capture buffer"); | |
164 | beaglelogic_close(devc); | |
165 | return SR_ERR; | |
166 | } | |
bb993797 | 167 | |
ad9dbc1c | 168 | /* We're good to go now */ |
bb993797 | 169 | sdi->status = SR_ST_ACTIVE; |
bb993797 KA |
170 | return SR_OK; |
171 | } | |
172 | ||
173 | static int dev_close(struct sr_dev_inst *sdi) | |
174 | { | |
ad9dbc1c | 175 | struct dev_context *devc = sdi->priv; |
bb993797 | 176 | |
ad9dbc1c KA |
177 | if (sdi->status == SR_ST_ACTIVE) { |
178 | /* Close the memory mapping and the file */ | |
179 | beaglelogic_munmap(devc); | |
180 | beaglelogic_close(devc); | |
181 | } | |
bb993797 | 182 | sdi->status = SR_ST_INACTIVE; |
bb993797 KA |
183 | return SR_OK; |
184 | } | |
185 | ||
584560f1 | 186 | static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi, |
bb993797 KA |
187 | const struct sr_channel_group *cg) |
188 | { | |
ad9dbc1c | 189 | struct dev_context *devc = sdi->priv; |
dcd438ee | 190 | |
bb993797 KA |
191 | (void)cg; |
192 | ||
bb993797 | 193 | switch (key) { |
ad9dbc1c KA |
194 | case SR_CONF_LIMIT_SAMPLES: |
195 | *data = g_variant_new_uint64(devc->limit_samples); | |
196 | break; | |
ad9dbc1c KA |
197 | case SR_CONF_SAMPLERATE: |
198 | *data = g_variant_new_uint64(devc->cur_samplerate); | |
199 | break; | |
e743a47d AJ |
200 | case SR_CONF_CAPTURE_RATIO: |
201 | *data = g_variant_new_uint64(devc->capture_ratio); | |
202 | break; | |
ad9dbc1c KA |
203 | case SR_CONF_NUM_LOGIC_CHANNELS: |
204 | *data = g_variant_new_uint32(g_slist_length(sdi->channels)); | |
205 | break; | |
bb993797 KA |
206 | default: |
207 | return SR_ERR_NA; | |
208 | } | |
209 | ||
ad9dbc1c | 210 | return SR_OK; |
bb993797 KA |
211 | } |
212 | ||
584560f1 | 213 | static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi, |
bb993797 KA |
214 | const struct sr_channel_group *cg) |
215 | { | |
ad9dbc1c KA |
216 | struct dev_context *devc = sdi->priv; |
217 | uint64_t tmp_u64; | |
dcd438ee | 218 | |
bb993797 KA |
219 | (void)cg; |
220 | ||
221 | if (sdi->status != SR_ST_ACTIVE) | |
222 | return SR_ERR_DEV_CLOSED; | |
223 | ||
bb993797 | 224 | switch (key) { |
ad9dbc1c KA |
225 | case SR_CONF_SAMPLERATE: |
226 | devc->cur_samplerate = g_variant_get_uint64(data); | |
227 | return beaglelogic_set_samplerate(devc); | |
ad9dbc1c KA |
228 | case SR_CONF_LIMIT_SAMPLES: |
229 | tmp_u64 = g_variant_get_uint64(data); | |
230 | devc->limit_samples = tmp_u64; | |
231 | devc->triggerflags = BL_TRIGGERFLAGS_ONESHOT; | |
232 | ||
233 | /* Check if we have sufficient buffer size */ | |
234 | tmp_u64 *= SAMPLEUNIT_TO_BYTES(devc->sampleunit); | |
235 | if (tmp_u64 > devc->buffersize) { | |
236 | sr_warn("Insufficient buffer space has been allocated."); | |
237 | sr_warn("Please use \'echo <size in bytes> > "\ | |
238 | BEAGLELOGIC_SYSFS_ATTR(memalloc) \ | |
239 | "\' as root to increase the buffer size, this"\ | |
240 | " capture is now truncated to %d Msamples", | |
241 | devc->buffersize / | |
242 | (SAMPLEUNIT_TO_BYTES(devc->sampleunit) * 1000000)); | |
243 | } | |
244 | return beaglelogic_set_triggerflags(devc); | |
e743a47d AJ |
245 | case SR_CONF_CAPTURE_RATIO: |
246 | devc->capture_ratio = g_variant_get_uint64(data); | |
a5c38703 | 247 | if (devc->capture_ratio > 100) |
e743a47d | 248 | return SR_ERR; |
e743a47d | 249 | return SR_OK; |
bb993797 | 250 | default: |
ad9dbc1c | 251 | return SR_ERR_NA; |
bb993797 KA |
252 | } |
253 | ||
ad9dbc1c | 254 | return SR_OK; |
bb993797 KA |
255 | } |
256 | ||
584560f1 | 257 | static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi, |
bb993797 KA |
258 | const struct sr_channel_group *cg) |
259 | { | |
260 | int ret; | |
ad9dbc1c KA |
261 | GVariant *gvar; |
262 | GVariantBuilder gvb; | |
bb993797 KA |
263 | |
264 | (void)sdi; | |
bb993797 KA |
265 | (void)cg; |
266 | ||
267 | ret = SR_OK; | |
268 | switch (key) { | |
138589b0 BV |
269 | case SR_CONF_SCAN_OPTIONS: |
270 | *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32, | |
271 | scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t)); | |
272 | break; | |
ad9dbc1c | 273 | case SR_CONF_DEVICE_OPTIONS: |
584560f1 | 274 | *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32, |
f254bc4b | 275 | devopts, ARRAY_SIZE(devopts), sizeof(uint32_t)); |
ad9dbc1c KA |
276 | break; |
277 | case SR_CONF_SAMPLERATE: | |
278 | g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}")); | |
279 | gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"), | |
280 | samplerates, ARRAY_SIZE(samplerates), sizeof(uint64_t)); | |
281 | g_variant_builder_add(&gvb, "{sv}", "samplerate-steps", gvar); | |
282 | *data = g_variant_builder_end(&gvb); | |
283 | break; | |
284 | case SR_CONF_TRIGGER_MATCH: | |
af945a66 | 285 | *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32, |
ad9dbc1c KA |
286 | soft_trigger_matches, ARRAY_SIZE(soft_trigger_matches), |
287 | sizeof(int32_t)); | |
288 | break; | |
bb993797 KA |
289 | default: |
290 | return SR_ERR_NA; | |
291 | } | |
292 | ||
293 | return ret; | |
294 | } | |
295 | ||
ad9dbc1c KA |
296 | /* get a sane timeout for poll() */ |
297 | #define BUFUNIT_TIMEOUT_MS(devc) (100 + ((devc->bufunitsize * 1000) / \ | |
298 | (uint32_t)(devc->cur_samplerate))) | |
299 | ||
695dc859 | 300 | static int dev_acquisition_start(const struct sr_dev_inst *sdi) |
bb993797 | 301 | { |
ad9dbc1c KA |
302 | struct dev_context *devc = sdi->priv; |
303 | struct sr_trigger *trigger; | |
bb993797 KA |
304 | |
305 | if (sdi->status != SR_ST_ACTIVE) | |
306 | return SR_ERR_DEV_CLOSED; | |
307 | ||
ad9dbc1c KA |
308 | /* Clear capture state */ |
309 | devc->bytes_read = 0; | |
310 | devc->offset = 0; | |
311 | ||
312 | /* Configure channels */ | |
313 | devc->sampleunit = g_slist_length(sdi->channels) > 8 ? | |
314 | BL_SAMPLEUNIT_16_BITS : BL_SAMPLEUNIT_8_BITS; | |
315 | beaglelogic_set_sampleunit(devc); | |
316 | ||
317 | /* Configure triggers & send header packet */ | |
318 | if ((trigger = sr_session_trigger_get(sdi->session))) { | |
e743a47d AJ |
319 | int pre_trigger_samples = 0; |
320 | if (devc->limit_samples > 0) | |
321 | pre_trigger_samples = devc->capture_ratio * devc->limit_samples/100; | |
322 | devc->stl = soft_trigger_logic_new(sdi, trigger, pre_trigger_samples); | |
98fec29e | 323 | if (!devc->stl) |
e743a47d | 324 | return SR_ERR_MALLOC; |
ad9dbc1c KA |
325 | devc->trigger_fired = FALSE; |
326 | } else | |
327 | devc->trigger_fired = TRUE; | |
695dc859 | 328 | std_session_send_df_header(sdi, LOG_PREFIX); |
ad9dbc1c KA |
329 | |
330 | /* Trigger and add poll on file */ | |
331 | beaglelogic_start(devc); | |
332 | sr_session_source_add_pollfd(sdi->session, &devc->pollfd, | |
333 | BUFUNIT_TIMEOUT_MS(devc), beaglelogic_receive_data, | |
334 | (void *)sdi); | |
bb993797 KA |
335 | |
336 | return SR_OK; | |
337 | } | |
338 | ||
695dc859 | 339 | static int dev_acquisition_stop(struct sr_dev_inst *sdi) |
bb993797 | 340 | { |
ad9dbc1c | 341 | struct dev_context *devc = sdi->priv; |
ad9dbc1c | 342 | |
bb993797 KA |
343 | if (sdi->status != SR_ST_ACTIVE) |
344 | return SR_ERR_DEV_CLOSED; | |
345 | ||
ad9dbc1c KA |
346 | /* Execute a stop on BeagleLogic */ |
347 | beaglelogic_stop(devc); | |
348 | ||
349 | /* lseek to offset 0, flushes the cache */ | |
350 | lseek(devc->fd, 0, SEEK_SET); | |
351 | ||
352 | /* Remove session source and send EOT packet */ | |
353 | sr_session_source_remove_pollfd(sdi->session, &devc->pollfd); | |
3be42bc2 | 354 | std_session_send_df_end(sdi, LOG_PREFIX); |
bb993797 KA |
355 | |
356 | return SR_OK; | |
357 | } | |
358 | ||
dd5c48a6 | 359 | static struct sr_dev_driver beaglelogic_driver_info = { |
bb993797 KA |
360 | .name = "beaglelogic", |
361 | .longname = "BeagleLogic", | |
362 | .api_version = 1, | |
c2fdcc25 | 363 | .init = std_init, |
700d6b64 | 364 | .cleanup = std_cleanup, |
bb993797 | 365 | .scan = scan, |
c01bf34c | 366 | .dev_list = std_dev_list, |
bb993797 KA |
367 | .config_get = config_get, |
368 | .config_set = config_set, | |
369 | .config_list = config_list, | |
370 | .dev_open = dev_open, | |
371 | .dev_close = dev_close, | |
372 | .dev_acquisition_start = dev_acquisition_start, | |
373 | .dev_acquisition_stop = dev_acquisition_stop, | |
41812aca | 374 | .context = NULL, |
bb993797 | 375 | }; |
dd5c48a6 | 376 | SR_REGISTER_DEV_DRIVER(beaglelogic_driver_info); |