2 * This file is part of the libsigrok project.
4 * Copyright (C) 2014 Kumar Abhishek <abhishek@theembeddedkitchen.net>
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.
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.
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/>.
21 #include "beaglelogic.h"
23 SR_PRIV struct sr_dev_driver beaglelogic_driver_info;
24 static struct sr_dev_driver *di = &beaglelogic_driver_info;
27 static const uint32_t scanopts[] = {
28 SR_CONF_NUM_LOGIC_CHANNELS,
31 /* Hardware capabilities */
32 static const uint32_t devopts[] = {
33 SR_CONF_LOGIC_ANALYZER,
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_NUM_LOGIC_CHANNELS | SR_CONF_GET,
41 /* Trigger matching capabilities */
42 static const int32_t soft_trigger_matches[] = {
50 /* Channels are numbered 0-13 */
51 SR_PRIV const char *beaglelogic_channel_names[NUM_CHANNELS + 1] = {
52 "P8_45", "P8_46", "P8_43", "P8_44", "P8_41", "P8_42", "P8_39", "P8_40",
53 "P8_27", "P8_29", "P8_28", "P8_30", "P8_21", "P8_20", NULL,
56 /* Possible sample rates : 10 Hz to 100 MHz = (100 / x) MHz */
57 static const uint64_t samplerates[] = {
63 static int init(struct sr_context *sr_ctx)
65 return std_init(sr_ctx, di, LOG_PREFIX);
68 static struct dev_context * beaglelogic_devc_alloc(void)
70 struct dev_context *devc;
72 /* Allocate zeroed structure */
73 devc = g_try_malloc0(sizeof(*devc));
75 /* Default non-zero values (if any) */
77 devc->limit_samples = (uint64_t)-1;
82 static GSList *scan(GSList *options)
84 struct drv_context *drvc;
86 struct sr_config *src;
87 struct sr_dev_inst *sdi;
88 struct dev_context *devc;
89 struct sr_channel *ch;
94 drvc->instances = NULL;
96 /* Probe for /dev/beaglelogic */
97 if (!g_file_test(BEAGLELOGIC_DEV_NODE, G_FILE_TEST_EXISTS))
100 sdi = sr_dev_inst_new(0, SR_ST_INACTIVE, NULL, "BeagleLogic", "1.0");
103 /* Unless explicitly specified, keep max channels to 8 only */
105 for (l = options; l; l = l->next) {
107 if (src->key == SR_CONF_NUM_LOGIC_CHANNELS)
108 maxch = g_variant_get_int32(src->data);
111 /* We need to test for number of channels by opening the node */
112 devc = beaglelogic_devc_alloc();
114 if (beaglelogic_open_nonblock(devc) != SR_OK) {
116 sr_dev_inst_free(sdi);
122 maxch = NUM_CHANNELS;
123 devc->sampleunit = BL_SAMPLEUNIT_16_BITS;
126 devc->sampleunit = BL_SAMPLEUNIT_8_BITS;
129 beaglelogic_set_sampleunit(devc);
130 beaglelogic_close(devc);
133 sr_info("BeagleLogic device found at "BEAGLELOGIC_DEV_NODE);
135 /* Fill the channels */
136 for (i = 0; i < maxch; i++) {
137 if (!(ch = sr_channel_new(i, SR_CHANNEL_LOGIC, TRUE,
138 beaglelogic_channel_names[i])))
140 sdi->channels = g_slist_append(sdi->channels, ch);
144 drvc->instances = g_slist_append(drvc->instances, sdi);
145 devices = g_slist_append(devices, sdi);
150 static GSList *dev_list(void)
152 return ((struct drv_context *)(di->priv))->instances;
155 static int dev_clear(void)
157 return std_dev_clear(di, NULL);
160 static int dev_open(struct sr_dev_inst *sdi)
162 struct dev_context *devc = sdi->priv;
164 /* Open BeagleLogic */
165 if (beaglelogic_open_nonblock(devc))
168 /* Set fd and local attributes */
169 devc->pollfd.fd = devc->fd;
170 devc->pollfd.events = G_IO_IN;
172 /* Get the default attributes */
173 beaglelogic_get_samplerate(devc);
174 beaglelogic_get_sampleunit(devc);
175 beaglelogic_get_triggerflags(devc);
176 beaglelogic_get_buffersize(devc);
177 beaglelogic_get_bufunitsize(devc);
179 /* Map the kernel capture FIFO for reads, saves 1 level of memcpy */
180 if (beaglelogic_mmap(devc) != SR_OK) {
181 sr_err("Unable to map capture buffer");
182 beaglelogic_close(devc);
186 /* We're good to go now */
187 sdi->status = SR_ST_ACTIVE;
191 static int dev_close(struct sr_dev_inst *sdi)
193 struct dev_context *devc = sdi->priv;
195 if (sdi->status == SR_ST_ACTIVE) {
196 /* Close the memory mapping and the file */
197 beaglelogic_munmap(devc);
198 beaglelogic_close(devc);
200 sdi->status = SR_ST_INACTIVE;
204 static int cleanup(void)
206 struct drv_context *drvc;
207 struct sr_dev_inst *sdi;
211 if (!(drvc = di->priv))
214 /* Clean up the instances */
215 for (l = drvc->instances; l; l = l->next) {
219 sr_dev_inst_free(sdi);
221 g_slist_free(drvc->instances);
222 drvc->instances = NULL;
229 static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
230 const struct sr_channel_group *cg)
232 struct dev_context *devc = sdi->priv;
236 case SR_CONF_LIMIT_SAMPLES:
237 *data = g_variant_new_uint64(devc->limit_samples);
240 case SR_CONF_SAMPLERATE:
241 *data = g_variant_new_uint64(devc->cur_samplerate);
244 case SR_CONF_NUM_LOGIC_CHANNELS:
245 *data = g_variant_new_uint32(g_slist_length(sdi->channels));
255 static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
256 const struct sr_channel_group *cg)
258 struct dev_context *devc = sdi->priv;
262 if (sdi->status != SR_ST_ACTIVE)
263 return SR_ERR_DEV_CLOSED;
266 case SR_CONF_SAMPLERATE:
267 devc->cur_samplerate = g_variant_get_uint64(data);
268 return beaglelogic_set_samplerate(devc);
270 case SR_CONF_LIMIT_SAMPLES:
271 tmp_u64 = g_variant_get_uint64(data);
272 devc->limit_samples = tmp_u64;
273 devc->triggerflags = BL_TRIGGERFLAGS_ONESHOT;
275 /* Check if we have sufficient buffer size */
276 tmp_u64 *= SAMPLEUNIT_TO_BYTES(devc->sampleunit);
277 if (tmp_u64 > devc->buffersize) {
278 sr_warn("Insufficient buffer space has been allocated.");
279 sr_warn("Please use \'echo <size in bytes> > "\
280 BEAGLELOGIC_SYSFS_ATTR(memalloc) \
281 "\' as root to increase the buffer size, this"\
282 " capture is now truncated to %d Msamples",
284 (SAMPLEUNIT_TO_BYTES(devc->sampleunit) * 1000000));
286 return beaglelogic_set_triggerflags(devc);
295 static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
296 const struct sr_channel_group *cg)
308 case SR_CONF_SCAN_OPTIONS:
309 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
310 scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
312 case SR_CONF_DEVICE_OPTIONS:
313 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
314 devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
316 case SR_CONF_SAMPLERATE:
317 g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
318 gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"),
319 samplerates, ARRAY_SIZE(samplerates), sizeof(uint64_t));
320 g_variant_builder_add(&gvb, "{sv}", "samplerate-steps", gvar);
321 *data = g_variant_builder_end(&gvb);
323 case SR_CONF_TRIGGER_MATCH:
324 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
325 soft_trigger_matches, ARRAY_SIZE(soft_trigger_matches),
335 /* get a sane timeout for poll() */
336 #define BUFUNIT_TIMEOUT_MS(devc) (100 + ((devc->bufunitsize * 1000) / \
337 (uint32_t)(devc->cur_samplerate)))
339 static int dev_acquisition_start(const struct sr_dev_inst *sdi,
343 struct dev_context *devc = sdi->priv;
344 struct sr_trigger *trigger;
346 if (sdi->status != SR_ST_ACTIVE)
347 return SR_ERR_DEV_CLOSED;
349 /* Save user pointer */
350 devc->cb_data = cb_data;
352 /* Clear capture state */
353 devc->bytes_read = 0;
356 /* Configure channels */
357 devc->sampleunit = g_slist_length(sdi->channels) > 8 ?
358 BL_SAMPLEUNIT_16_BITS : BL_SAMPLEUNIT_8_BITS;
359 beaglelogic_set_sampleunit(devc);
361 /* Configure triggers & send header packet */
362 if ((trigger = sr_session_trigger_get(sdi->session))) {
363 devc->stl = soft_trigger_logic_new(sdi, trigger);
364 devc->trigger_fired = FALSE;
366 devc->trigger_fired = TRUE;
367 std_session_send_df_header(cb_data, LOG_PREFIX);
369 /* Trigger and add poll on file */
370 beaglelogic_start(devc);
371 sr_session_source_add_pollfd(sdi->session, &devc->pollfd,
372 BUFUNIT_TIMEOUT_MS(devc), beaglelogic_receive_data,
378 static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
380 struct dev_context *devc = sdi->priv;
381 struct sr_datafeed_packet pkt;
385 if (sdi->status != SR_ST_ACTIVE)
386 return SR_ERR_DEV_CLOSED;
388 /* Execute a stop on BeagleLogic */
389 beaglelogic_stop(devc);
391 /* lseek to offset 0, flushes the cache */
392 lseek(devc->fd, 0, SEEK_SET);
394 /* Remove session source and send EOT packet */
395 sr_session_source_remove_pollfd(sdi->session, &devc->pollfd);
396 pkt.type = SR_DF_END;
398 sr_session_send(sdi, &pkt);
403 SR_PRIV struct sr_dev_driver beaglelogic_driver_info = {
404 .name = "beaglelogic",
405 .longname = "BeagleLogic",
410 .dev_list = dev_list,
411 .dev_clear = dev_clear,
412 .config_get = config_get,
413 .config_set = config_set,
414 .config_list = config_list,
415 .dev_open = dev_open,
416 .dev_close = dev_close,
417 .dev_acquisition_start = dev_acquisition_start,
418 .dev_acquisition_stop = dev_acquisition_stop,